diff --git a/Documentation/devicetree/bindings/mtd/brcm,brcmnand.txt b/Documentation/devicetree/bindings/mtd/brcm,brcmnand.txt
new file mode 100644
index 0000000000000000000000000000000000000000..4ff7128ee3b20297d427dc9fb98ac0cb0c1966c7
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/brcm,brcmnand.txt
@@ -0,0 +1,150 @@
+* Broadcom STB NAND Controller
+
+The Broadcom Set-Top Box NAND controller supports low-level access to raw NAND
+flash chips. It has a memory-mapped register interface for both control
+registers and for its data input/output buffer. On some SoCs, this controller is
+paired with a custom DMA engine (inventively named "Flash DMA") which supports
+basic PROGRAM and READ functions, among other features.
+
+This controller was originally designed for STB SoCs (BCM7xxx) but is now
+available on a variety of Broadcom SoCs, including some BCM3xxx, BCM63xx, and
+iProc/Cygnus. Its history includes several similar (but not fully register
+compatible) versions.
+
+Required properties:
+- compatible : May contain an SoC-specific compatibility string (see below)
+ to account for any SoC-specific hardware bits that may be
+ added on top of the base core controller.
+ In addition, must contain compatibility information about
+ the core NAND controller, of the following form:
+ "brcm,brcmnand" and an appropriate version compatibility
+ string, like "brcm,brcmnand-v7.0"
+ Possible values:
+ brcm,brcmnand-v4.0
+ brcm,brcmnand-v5.0
+ brcm,brcmnand-v6.0
+ brcm,brcmnand-v6.1
+ brcm,brcmnand-v7.0
+ brcm,brcmnand-v7.1
+ brcm,brcmnand
+- reg : the register start and length for NAND register region.
+ (optional) Flash DMA register range (if present)
+ (optional) NAND flash cache range (if at non-standard offset)
+- reg-names : a list of the names corresponding to the previous register
+ ranges. Should contain "nand" and (optionally)
+ "flash-dma" and/or "nand-cache".
+- interrupts : The NAND CTLRDY interrupt and (if Flash DMA is available)
+ FLASH_DMA_DONE
+- interrupt-names : May be "nand_ctlrdy" or "flash_dma_done", if broken out as
+ individual interrupts.
+ May be "nand", if the SoC has the individual NAND
+ interrupts multiplexed behind another custom piece of
+ hardware
+- interrupt-parent : See standard interrupt bindings
+- #address-cells : <1> - subnodes give the chip-select number
+- #size-cells : <0>
+
+Optional properties:
+- brcm,nand-has-wp : Some versions of this IP include a write-protect
+ (WP) control bit. It is always available on >=
+ v7.0. Use this property to describe the rare
+ earlier versions of this core that include WP
+
+ -- Additonal SoC-specific NAND controller properties --
+
+The NAND controller is integrated differently on the variety of SoCs on which it
+is found. Part of this integration involves providing status and enable bits
+with which to control the 8 exposed NAND interrupts, as well as hardware for
+configuring the endianness of the data bus. On some SoCs, these features are
+handled via standard, modular components (e.g., their interrupts look like a
+normal IRQ chip), but on others, they are controlled in unique and interesting
+ways, sometimes with registers that lump multiple NAND-related functions
+together. The former case can be described simply by the standard interrupts
+properties in the main controller node. But for the latter exceptional cases,
+we define additional 'compatible' properties and associated register resources within the NAND controller node above.
+
+ - compatible: Can be one of several SoC-specific strings. Each SoC may have
+ different requirements for its additional properties, as described below each
+ bullet point below.
+
+ * "brcm,nand-bcm63138"
+ - reg: (required) the 'NAND_INT_BASE' register range, with separate status
+ and enable registers
+ - reg-names: (required) "nand-int-base"
+
+ * "brcm,nand-iproc"
+ - reg: (required) the "IDM" register range, for interrupt enable and APB
+ bus access endianness configuration, and the "EXT" register range,
+ for interrupt status/ack.
+ - reg-names: (required) a list of the names corresponding to the previous
+ register ranges. Should contain "iproc-idm" and "iproc-ext".
+
+
+* NAND chip-select
+
+Each controller (compatible: "brcm,brcmnand") may contain one or more subnodes
+to represent enabled chip-selects which (may) contain NAND flash chips. Their
+properties are as follows.
+
+Required properties:
+- compatible : should contain "brcm,nandcs"
+- reg : a single integer representing the chip-select
+ number (e.g., 0, 1, 2, etc.)
+- #address-cells : see partition.txt
+- #size-cells : see partition.txt
+- nand-ecc-strength : see nand.txt
+- nand-ecc-step-size : must be 512 or 1024. See nand.txt
+
+Optional properties:
+- nand-on-flash-bbt : boolean, to enable the on-flash BBT for this
+ chip-select. See nand.txt
+- brcm,nand-oob-sector-size : integer, to denote the spare area sector size
+ expected for the ECC layout in use. This size, in
+ addition to the strength and step-size,
+ determines how the hardware BCH engine will lay
+ out the parity bytes it stores on the flash.
+ This property can be automatically determined by
+ the flash geometry (particularly the NAND page
+ and OOB size) in many cases, but when booting
+ from NAND, the boot controller has only a limited
+ number of available options for its default ECC
+ layout.
+
+Each nandcs device node may optionally contain sub-nodes describing the flash
+partition mapping. See partition.txt for more detail.
+
+
+Example:
+
+nand@f0442800 {
+ compatible = "brcm,brcmnand-v7.0", "brcm,brcmnand";
+ reg = <0xF0442800 0x600>,
+ <0xF0443000 0x100>;
+ reg-names = "nand", "flash-dma";
+ interrupt-parent = <&hif_intr2_intc>;
+ interrupts = <24>, <4>;
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ nandcs@1 {
+ compatible = "brcm,nandcs";
+ reg = <1>; // Chip select 1
+ nand-on-flash-bbt;
+ nand-ecc-strength = <12>;
+ nand-ecc-step-size = <512>;
+
+ // Partitions
+ #address-cells = <1>; // <2>, for 64-bit offset
+ #size-cells = <1>; // <2>, for 64-bit length
+ flash0.rootfs@0 {
+ reg = <0 0x10000000>;
+ };
+ flash0@0 {
+ reg = <0 0>; // MTDPART_SIZ_FULL
+ };
+ flash0.kernel@10000000 {
+ reg = <0x10000000 0x400000>;
+ };
+ };
+};
diff --git a/MAINTAINERS b/MAINTAINERS
index a0ee3ca890ede76e43bcefdf5ef931c14834f7f3..e46cf6f0e5b0c704e84103fb47c2f3eb1a9971c5 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2267,6 +2267,12 @@ S: Supported
F: drivers/gpio/gpio-bcm-kona.c
F: Documentation/devicetree/bindings/gpio/gpio-bcm-kona.txt
+BROADCOM STB NAND FLASH DRIVER
+M: Brian Norris <computersforpeace@gmail.com>
+L: linux-mtd@lists.infradead.org
+S: Maintained
+F: drivers/mtd/nand/brcmnand/
+
BROADCOM SPECIFIC AMBA DRIVER (BCMA)
M: Rafał Miłecki <zajec5@gmail.com>
L: linux-wireless@vger.kernel.org
diff --git a/drivers/mtd/chips/Kconfig b/drivers/mtd/chips/Kconfig
index 9f02c28c0204d1c6935551dbca443d3665eee31e..54479c481a7a815dbedc5cbdc3bc734039620925 100644
--- a/drivers/mtd/chips/Kconfig
+++ b/drivers/mtd/chips/Kconfig
@@ -16,6 +16,7 @@ config MTD_CFI
config MTD_JEDECPROBE
tristate "Detect non-CFI AMD/JEDEC-compatible flash chips"
select MTD_GEN_PROBE
+ select MTD_CFI_UTIL
help
This option enables JEDEC-style probing of flash chips which are not
compatible with the Common Flash Interface, but will use the common
diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c
index c50d8cf0f60dd01b0b6c25822788b53dd2884bfd..c3624eb571d16f0067acc8137e8654f1bf829a37 100644
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -1295,7 +1295,7 @@ static int do_otp_write(struct map_info *map, struct flchip *chip, loff_t adr,
unsigned long bus_ofs = adr & ~(map_bankwidth(map)-1);
int gap = adr - bus_ofs;
int n = min_t(int, len, map_bankwidth(map) - gap);
- map_word datum;
+ map_word datum = map_word_ff(map);
if (n != map_bankwidth(map)) {
/* partial write of a word, load old contents */
diff --git a/drivers/mtd/chips/cfi_util.c b/drivers/mtd/chips/cfi_util.c
index 09c79bd0b4f4fbdfd16f87fab4cb5687be070209..6f16552cd59f48d4cb4aab5f6fb3a250190cb4c2 100644
--- a/drivers/mtd/chips/cfi_util.c
+++ b/drivers/mtd/chips/cfi_util.c
@@ -23,6 +23,194 @@
#include <linux/mtd/map.h>
#include <linux/mtd/cfi.h>
+void cfi_udelay(int us)
+{
+ if (us >= 1000) {
+ msleep((us+999)/1000);
+ } else {
+ udelay(us);
+ cond_resched();
+ }
+}
+EXPORT_SYMBOL(cfi_udelay);
+
+/*
+ * Returns the command address according to the given geometry.
+ */
+uint32_t cfi_build_cmd_addr(uint32_t cmd_ofs,
+ struct map_info *map, struct cfi_private *cfi)
+{
+ unsigned bankwidth = map_bankwidth(map);
+ unsigned interleave = cfi_interleave(cfi);
+ unsigned type = cfi->device_type;
+ uint32_t addr;
+
+ addr = (cmd_ofs * type) * interleave;
+
+ /* Modify the unlock address if we are in compatibility mode.
+ * For 16bit devices on 8 bit busses
+ * and 32bit devices on 16 bit busses
+ * set the low bit of the alternating bit sequence of the address.
+ */
+ if (((type * interleave) > bankwidth) && ((cmd_ofs & 0xff) == 0xaa))
+ addr |= (type >> 1)*interleave;
+
+ return addr;
+}
+EXPORT_SYMBOL(cfi_build_cmd_addr);
+
+/*
+ * Transforms the CFI command for the given geometry (bus width & interleave).
+ * It looks too long to be inline, but in the common case it should almost all
+ * get optimised away.
+ */
+map_word cfi_build_cmd(u_long cmd, struct map_info *map, struct cfi_private *cfi)
+{
+ map_word val = { {0} };
+ int wordwidth, words_per_bus, chip_mode, chips_per_word;
+ unsigned long onecmd;
+ int i;
+
+ /* We do it this way to give the compiler a fighting chance
+ of optimising away all the crap for 'bankwidth' larger than
+ an unsigned long, in the common case where that support is
+ disabled */
+ if (map_bankwidth_is_large(map)) {
+ wordwidth = sizeof(unsigned long);
+ words_per_bus = (map_bankwidth(map)) / wordwidth; // i.e. normally 1
+ } else {
+ wordwidth = map_bankwidth(map);
+ words_per_bus = 1;
+ }
+
+ chip_mode = map_bankwidth(map) / cfi_interleave(cfi);
+ chips_per_word = wordwidth * cfi_interleave(cfi) / map_bankwidth(map);
+
+ /* First, determine what the bit-pattern should be for a single
+ device, according to chip mode and endianness... */
+ switch (chip_mode) {
+ default: BUG();
+ case 1:
+ onecmd = cmd;
+ break;
+ case 2:
+ onecmd = cpu_to_cfi16(map, cmd);
+ break;
+ case 4:
+ onecmd = cpu_to_cfi32(map, cmd);
+ break;
+ }
+
+ /* Now replicate it across the size of an unsigned long, or
+ just to the bus width as appropriate */
+ switch (chips_per_word) {
+ default: BUG();
+#if BITS_PER_LONG >= 64
+ case 8:
+ onecmd |= (onecmd << (chip_mode * 32));
+#endif
+ case 4:
+ onecmd |= (onecmd << (chip_mode * 16));
+ case 2:
+ onecmd |= (onecmd << (chip_mode * 8));
+ case 1:
+ ;
+ }
+
+ /* And finally, for the multi-word case, replicate it
+ in all words in the structure */
+ for (i=0; i < words_per_bus; i++) {
+ val.x[i] = onecmd;
+ }
+
+ return val;
+}
+EXPORT_SYMBOL(cfi_build_cmd);
+
+unsigned long cfi_merge_status(map_word val, struct map_info *map,
+ struct cfi_private *cfi)
+{
+ int wordwidth, words_per_bus, chip_mode, chips_per_word;
+ unsigned long onestat, res = 0;
+ int i;
+
+ /* We do it this way to give the compiler a fighting chance
+ of optimising away all the crap for 'bankwidth' larger than
+ an unsigned long, in the common case where that support is
+ disabled */
+ if (map_bankwidth_is_large(map)) {
+ wordwidth = sizeof(unsigned long);
+ words_per_bus = (map_bankwidth(map)) / wordwidth; // i.e. normally 1
+ } else {
+ wordwidth = map_bankwidth(map);
+ words_per_bus = 1;
+ }
+
+ chip_mode = map_bankwidth(map) / cfi_interleave(cfi);
+ chips_per_word = wordwidth * cfi_interleave(cfi) / map_bankwidth(map);
+
+ onestat = val.x[0];
+ /* Or all status words together */
+ for (i=1; i < words_per_bus; i++) {
+ onestat |= val.x[i];
+ }
+
+ res = onestat;
+ switch(chips_per_word) {
+ default: BUG();
+#if BITS_PER_LONG >= 64
+ case 8:
+ res |= (onestat >> (chip_mode * 32));
+#endif
+ case 4:
+ res |= (onestat >> (chip_mode * 16));
+ case 2:
+ res |= (onestat >> (chip_mode * 8));
+ case 1:
+ ;
+ }
+
+ /* Last, determine what the bit-pattern should be for a single
+ device, according to chip mode and endianness... */
+ switch (chip_mode) {
+ case 1:
+ break;
+ case 2:
+ res = cfi16_to_cpu(map, res);
+ break;
+ case 4:
+ res = cfi32_to_cpu(map, res);
+ break;
+ default: BUG();
+ }
+ return res;
+}
+EXPORT_SYMBOL(cfi_merge_status);
+
+/*
+ * Sends a CFI command to a bank of flash for the given geometry.
+ *
+ * Returns the offset in flash where the command was written.
+ * If prev_val is non-null, it will be set to the value at the command address,
+ * before the command was written.
+ */
+uint32_t cfi_send_gen_cmd(u_char cmd, uint32_t cmd_addr, uint32_t base,
+ struct map_info *map, struct cfi_private *cfi,
+ int type, map_word *prev_val)
+{
+ map_word val;
+ uint32_t addr = base + cfi_build_cmd_addr(cmd_addr, map, cfi);
+ val = cfi_build_cmd(cmd, map, cfi);
+
+ if (prev_val)
+ *prev_val = map_read(map, addr);
+
+ map_write(map, val, addr);
+
+ return addr - base;
+}
+EXPORT_SYMBOL(cfi_send_gen_cmd);
+
int __xipram cfi_qry_present(struct map_info *map, __u32 base,
struct cfi_private *cfi)
{
diff --git a/drivers/mtd/devices/docg3.c b/drivers/mtd/devices/docg3.c
index 866d319044750bda27e5679d36ff4b0e5d9d26aa..5e67b4acde780e648669c8de753776a89f99fff8 100644
--- a/drivers/mtd/devices/docg3.c
+++ b/drivers/mtd/devices/docg3.c
@@ -1815,7 +1815,7 @@ static void doc_dbg_unregister(struct docg3 *docg3)
* @chip_id: The chip ID of the supported chip
* @mtd: The structure to fill
*/
-static void __init doc_set_driver_info(int chip_id, struct mtd_info *mtd)
+static int __init doc_set_driver_info(int chip_id, struct mtd_info *mtd)
{
struct docg3 *docg3 = mtd->priv;
int cfg;
@@ -1828,6 +1828,8 @@ static void __init doc_set_driver_info(int chip_id, struct mtd_info *mtd)
case DOC_CHIPID_G3:
mtd->name = kasprintf(GFP_KERNEL, "docg3.%d",
docg3->device_id);
+ if (!mtd->name)
+ return -ENOMEM;
docg3->max_block = 2047;
break;
}
@@ -1850,6 +1852,8 @@ static void __init doc_set_driver_info(int chip_id, struct mtd_info *mtd)
mtd->_block_isbad = doc_block_isbad;
mtd->ecclayout = &docg3_oobinfo;
mtd->ecc_strength = DOC_ECC_BCH_T;
+
+ return 0;
}
/**
@@ -1900,7 +1904,7 @@ doc_probe_device(struct docg3_cascade *cascade, int floor, struct device *dev)
ret = 0;
if (chip_id != (u16)(~chip_id_inv)) {
- goto nomem3;
+ goto nomem4;
}
switch (chip_id) {
@@ -1910,15 +1914,19 @@ doc_probe_device(struct docg3_cascade *cascade, int floor, struct device *dev)
break;
default:
doc_err("Chip id %04x is not a DiskOnChip G3 chip\n", chip_id);
- goto nomem3;
+ goto nomem4;
}
- doc_set_driver_info(chip_id, mtd);
+ ret = doc_set_driver_info(chip_id, mtd);
+ if (ret)
+ goto nomem4;
doc_hamming_ecc_init(docg3, DOC_LAYOUT_OOB_PAGEINFO_SZ);
doc_reload_bbt(docg3);
return mtd;
+nomem4:
+ kfree(docg3->bbt);
nomem3:
kfree(mtd);
nomem2:
@@ -2117,7 +2125,7 @@ static int docg3_release(struct platform_device *pdev)
}
#ifdef CONFIG_OF
-static struct of_device_id docg3_dt_ids[] = {
+static const struct of_device_id docg3_dt_ids[] = {
{ .compatible = "m-systems,diskonchip-g3" },
{}
};
diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index 3af137f49ac9aa49c0c58ad59977b53b9d81f358..d313f948b96c62f208f3a20372f34efff176b2a7 100644
--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -261,45 +261,33 @@ static int m25p_remove(struct spi_device *spi)
* keep them available as module aliases for existing platforms.
*/
static const struct spi_device_id m25p_ids[] = {
- {"at25fs010"}, {"at25fs040"}, {"at25df041a"}, {"at25df321a"},
- {"at25df641"}, {"at26f004"}, {"at26df081a"}, {"at26df161a"},
- {"at26df321"}, {"at45db081d"},
- {"en25f32"}, {"en25p32"}, {"en25q32b"}, {"en25p64"},
- {"en25q64"}, {"en25qh128"}, {"en25qh256"},
- {"f25l32pa"},
- {"mr25h256"}, {"mr25h10"},
- {"gd25q32"}, {"gd25q64"},
- {"160s33b"}, {"320s33b"}, {"640s33b"},
- {"mx25l2005a"}, {"mx25l4005a"}, {"mx25l8005"}, {"mx25l1606e"},
- {"mx25l3205d"}, {"mx25l3255e"}, {"mx25l6405d"}, {"mx25l12805d"},
- {"mx25l12855e"},{"mx25l25635e"},{"mx25l25655e"},{"mx66l51235l"},
- {"mx66l1g55g"},
- {"n25q064"}, {"n25q128a11"}, {"n25q128a13"}, {"n25q256a"},
- {"n25q512a"}, {"n25q512ax3"}, {"n25q00"},
- {"pm25lv512"}, {"pm25lv010"}, {"pm25lq032"},
- {"s25sl032p"}, {"s25sl064p"}, {"s25fl256s0"}, {"s25fl256s1"},
- {"s25fl512s"}, {"s70fl01gs"}, {"s25sl12800"}, {"s25sl12801"},
- {"s25fl129p0"}, {"s25fl129p1"}, {"s25sl004a"}, {"s25sl008a"},
- {"s25sl016a"}, {"s25sl032a"}, {"s25sl064a"}, {"s25fl008k"},
- {"s25fl016k"}, {"s25fl064k"}, {"s25fl132k"},
- {"sst25vf040b"},{"sst25vf080b"},{"sst25vf016b"},{"sst25vf032b"},
- {"sst25vf064c"},{"sst25wf512"}, {"sst25wf010"}, {"sst25wf020"},
- {"sst25wf040"},
- {"m25p05"}, {"m25p10"}, {"m25p20"}, {"m25p40"},
- {"m25p80"}, {"m25p16"}, {"m25p32"}, {"m25p64"},
- {"m25p128"}, {"n25q032"},
+ /*
+ * Entries not used in DTs that should be safe to drop after replacing
+ * them with "nor-jedec" in platform data.
+ */
+ {"s25sl064a"}, {"w25x16"}, {"m25p10"}, {"m25px64"},
+
+ /*
+ * Entries that were used in DTs without "nor-jedec" fallback and should
+ * be kept for backward compatibility.
+ */
+ {"at25df321a"}, {"at25df641"}, {"at26df081a"},
+ {"mr25h256"},
+ {"mx25l4005a"}, {"mx25l1606e"}, {"mx25l6405d"}, {"mx25l12805d"},
+ {"mx25l25635e"},{"mx66l51235l"},
+ {"n25q064"}, {"n25q128a11"}, {"n25q128a13"}, {"n25q512a"},
+ {"s25fl256s1"}, {"s25fl512s"}, {"s25sl12801"}, {"s25fl008k"},
+ {"s25fl064k"},
+ {"sst25vf040b"},{"sst25vf016b"},{"sst25vf032b"},{"sst25wf040"},
+ {"m25p40"}, {"m25p80"}, {"m25p16"}, {"m25p32"},
+ {"m25p64"}, {"m25p128"},
+ {"w25x80"}, {"w25x32"}, {"w25q32"}, {"w25q32dw"},
+ {"w25q80bl"}, {"w25q128"}, {"w25q256"},
+
+ /* Flashes that can't be detected using JEDEC */
{"m25p05-nonjedec"}, {"m25p10-nonjedec"}, {"m25p20-nonjedec"},
{"m25p40-nonjedec"}, {"m25p80-nonjedec"}, {"m25p16-nonjedec"},
{"m25p32-nonjedec"}, {"m25p64-nonjedec"}, {"m25p128-nonjedec"},
- {"m45pe10"}, {"m45pe80"}, {"m45pe16"},
- {"m25pe20"}, {"m25pe80"}, {"m25pe16"},
- {"m25px16"}, {"m25px32"}, {"m25px32-s0"}, {"m25px32-s1"},
- {"m25px64"}, {"m25px80"},
- {"w25x10"}, {"w25x20"}, {"w25x40"}, {"w25x80"},
- {"w25x16"}, {"w25x32"}, {"w25q32"}, {"w25q32dw"},
- {"w25x64"}, {"w25q64"}, {"w25q80"}, {"w25q80bl"},
- {"w25q128"}, {"w25q256"}, {"cat25c11"},
- {"cat25c03"}, {"cat25c09"}, {"cat25c17"}, {"cat25128"},
/*
* Generic support for SPI NOR that can be identified by the JEDEC READ
diff --git a/drivers/mtd/devices/spear_smi.c b/drivers/mtd/devices/spear_smi.c
index 508bab3bd0c49b555b3cacf803f93b153b46ce13..04b24d2b03f285ab10c98d742b2915e48b3e4189 100644
--- a/drivers/mtd/devices/spear_smi.c
+++ b/drivers/mtd/devices/spear_smi.c
@@ -1,8 +1,8 @@
/*
* SMI (Serial Memory Controller) device driver for Serial NOR Flash on
* SPEAr platform
- * The serial nor interface is largely based on drivers/mtd/m25p80.c,
- * however the SPI interface has been replaced by SMI.
+ * The serial nor interface is largely based on m25p80.c, however the SPI
+ * interface has been replaced by SMI.
*
* Copyright © 2010 STMicroelectronics.
* Ashish Priyadarshi
diff --git a/drivers/mtd/maps/Kconfig b/drivers/mtd/maps/Kconfig
index e715ae90632f82e69991bdc7704cc5dbd35ab0f9..7c95a656f9e479339464ea2cc3423353fbbc808f 100644
--- a/drivers/mtd/maps/Kconfig
+++ b/drivers/mtd/maps/Kconfig
@@ -326,7 +326,7 @@ config MTD_BFIN_ASYNC
config MTD_GPIO_ADDR
tristate "GPIO-assisted Flash Chip Support"
- depends on GPIOLIB
+ depends on GPIOLIB || COMPILE_TEST
depends on MTD_COMPLEX_MAPPINGS
help
Map driver which allows flashes to be partially physically addressed
diff --git a/drivers/mtd/maps/amd76xrom.c b/drivers/mtd/maps/amd76xrom.c
index f7207b0a76dcf9d3537f6202c04dbf4696d3f069..f2b68667ea5904126daf90d2e7f719dfb7c25844 100644
--- a/drivers/mtd/maps/amd76xrom.c
+++ b/drivers/mtd/maps/amd76xrom.c
@@ -138,7 +138,7 @@ static int amd76xrom_init_one(struct pci_dev *pdev,
/*
* Try to reserve the window mem region. If this fails then
* it is likely due to a fragment of the window being
- * "reseved" by the BIOS. In the case that the
+ * "reserved" by the BIOS. In the case that the
* request_mem_region() fails then once the rom size is
* discovered we will try to reserve the unreserved fragment.
*/
diff --git a/drivers/mtd/maps/dc21285.c b/drivers/mtd/maps/dc21285.c
index f8a7dd14cee0cc7a8b6767f0ef281ea95dd89149..70a3db3ab856f47c8da32959aed6bf996f83428c 100644
--- a/drivers/mtd/maps/dc21285.c
+++ b/drivers/mtd/maps/dc21285.c
@@ -38,9 +38,9 @@ static void nw_en_write(void)
* we want to write a bit pattern XXX1 to Xilinx to enable
* the write gate, which will be open for about the next 2ms.
*/
- spin_lock_irqsave(&nw_gpio_lock, flags);
+ raw_spin_lock_irqsave(&nw_gpio_lock, flags);
nw_cpld_modify(CPLD_FLASH_WR_ENABLE, CPLD_FLASH_WR_ENABLE);
- spin_unlock_irqrestore(&nw_gpio_lock, flags);
+ raw_spin_unlock_irqrestore(&nw_gpio_lock, flags);
/*
* let the ISA bus to catch on...
diff --git a/drivers/mtd/maps/esb2rom.c b/drivers/mtd/maps/esb2rom.c
index f784cf0caa13b03d7a24542befe1a29e3638e35f..76ed651b515beef6275b7d67820eb1c4fee8e8dc 100644
--- a/drivers/mtd/maps/esb2rom.c
+++ b/drivers/mtd/maps/esb2rom.c
@@ -234,7 +234,7 @@ static int esb2rom_init_one(struct pci_dev *pdev,
/*
* Try to reserve the window mem region. If this fails then
- * it is likely due to the window being "reseved" by the BIOS.
+ * it is likely due to the window being "reserved" by the BIOS.
*/
window->rsrc.name = MOD_NAME;
window->rsrc.start = window->phys;
diff --git a/drivers/mtd/maps/ichxrom.c b/drivers/mtd/maps/ichxrom.c
index c7478e18f4858239319b34f916be6ad595695001..8636bba422009a1f54ff58b1611acac54cbf9b45 100644
--- a/drivers/mtd/maps/ichxrom.c
+++ b/drivers/mtd/maps/ichxrom.c
@@ -167,7 +167,7 @@ static int ichxrom_init_one(struct pci_dev *pdev,
/*
* Try to reserve the window mem region. If this fails then
- * it is likely due to the window being "reseved" by the BIOS.
+ * it is likely due to the window being "reserved" by the BIOS.
*/
window->rsrc.name = MOD_NAME;
window->rsrc.start = window->phys;
diff --git a/drivers/mtd/maps/lantiq-flash.c b/drivers/mtd/maps/lantiq-flash.c
index 33d26f5bee549ecd8bae2426ec9de3028e217d85..e2f878216048eed8ac69e973d5da7e9f4e668147 100644
--- a/drivers/mtd/maps/lantiq-flash.c
+++ b/drivers/mtd/maps/lantiq-flash.c
@@ -45,7 +45,6 @@ struct ltq_mtd {
};
static const char ltq_map_name[] = "ltq_nor";
-static const char * const ltq_probe_types[] = { "cmdlinepart", "ofpart", NULL };
static map_word
ltq_read16(struct map_info *map, unsigned long adr)
@@ -168,8 +167,7 @@ ltq_mtd_probe(struct platform_device *pdev)
cfi->addr_unlock2 ^= 1;
ppdata.of_node = pdev->dev.of_node;
- err = mtd_device_parse_register(ltq_mtd->mtd, ltq_probe_types,
- &ppdata, NULL, 0);
+ err = mtd_device_parse_register(ltq_mtd->mtd, NULL, &ppdata, NULL, 0);
if (err) {
dev_err(&pdev->dev, "failed to add partitions\n");
goto err_destroy;
diff --git a/drivers/mtd/maps/physmap_of.c b/drivers/mtd/maps/physmap_of.c
index ff26e979b1a17c243e1525adfceed3886d479ba1..774b32fd29e673c10cf927cd159a5d50829d6e86 100644
--- a/drivers/mtd/maps/physmap_of.c
+++ b/drivers/mtd/maps/physmap_of.c
@@ -147,7 +147,7 @@ static void of_free_probes(const char * const *probes)
kfree(probes);
}
-static struct of_device_id of_flash_match[];
+static const struct of_device_id of_flash_match[];
static int of_flash_probe(struct platform_device *dev)
{
const char * const *part_probe_types;
@@ -327,7 +327,7 @@ static int of_flash_probe(struct platform_device *dev)
return err;
}
-static struct of_device_id of_flash_match[] = {
+static const struct of_device_id of_flash_match[] = {
{
.compatible = "cfi-flash",
.data = (void *)"cfi_probe",
diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c
index 2b0c528709997a618d672e55c50bb44336a8cd69..41acc507b22ed942bee2f0df6f43dda073efeb99 100644
--- a/drivers/mtd/mtd_blkdevs.c
+++ b/drivers/mtd/mtd_blkdevs.c
@@ -197,6 +197,7 @@ static int blktrans_open(struct block_device *bdev, fmode_t mode)
return -ERESTARTSYS; /* FIXME: busy loop! -arnd*/
mutex_lock(&dev->lock);
+ mutex_lock(&mtd_table_mutex);
if (dev->open)
goto unlock;
@@ -220,6 +221,7 @@ static int blktrans_open(struct block_device *bdev, fmode_t mode)
unlock:
dev->open++;
+ mutex_unlock(&mtd_table_mutex);
mutex_unlock(&dev->lock);
blktrans_dev_put(dev);
return ret;
@@ -230,6 +232,7 @@ static int blktrans_open(struct block_device *bdev, fmode_t mode)
error_put:
module_put(dev->tr->owner);
kref_put(&dev->ref, blktrans_dev_release);
+ mutex_unlock(&mtd_table_mutex);
mutex_unlock(&dev->lock);
blktrans_dev_put(dev);
return ret;
@@ -243,6 +246,7 @@ static void blktrans_release(struct gendisk *disk, fmode_t mode)
return;
mutex_lock(&dev->lock);
+ mutex_lock(&mtd_table_mutex);
if (--dev->open)
goto unlock;
@@ -256,6 +260,7 @@ static void blktrans_release(struct gendisk *disk, fmode_t mode)
__put_mtd_device(dev->mtd);
}
unlock:
+ mutex_unlock(&mtd_table_mutex);
mutex_unlock(&dev->lock);
blktrans_dev_put(dev);
}
@@ -273,7 +278,7 @@ static int blktrans_getgeo(struct block_device *bdev, struct hd_geometry *geo)
if (!dev->mtd)
goto unlock;
- ret = dev->tr->getgeo ? dev->tr->getgeo(dev, geo) : 0;
+ ret = dev->tr->getgeo ? dev->tr->getgeo(dev, geo) : -ENOTTY;
unlock:
mutex_unlock(&dev->lock);
blktrans_dev_put(dev);
diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
index d172195fbd15fcbd947a2bc0780d0f9044cba2fd..8bbbb751bf45e2340e727439b6368c78d148089f 100644
--- a/drivers/mtd/mtdcore.c
+++ b/drivers/mtd/mtdcore.c
@@ -48,14 +48,34 @@
static struct backing_dev_info mtd_bdi = {
};
-static int mtd_cls_suspend(struct device *dev, pm_message_t state);
-static int mtd_cls_resume(struct device *dev);
+#ifdef CONFIG_PM_SLEEP
+
+static int mtd_cls_suspend(struct device *dev)
+{
+ struct mtd_info *mtd = dev_get_drvdata(dev);
+
+ return mtd ? mtd_suspend(mtd) : 0;
+}
+
+static int mtd_cls_resume(struct device *dev)
+{
+ struct mtd_info *mtd = dev_get_drvdata(dev);
+
+ if (mtd)
+ mtd_resume(mtd);
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(mtd_cls_pm_ops, mtd_cls_suspend, mtd_cls_resume);
+#define MTD_CLS_PM_OPS (&mtd_cls_pm_ops)
+#else
+#define MTD_CLS_PM_OPS NULL
+#endif
static struct class mtd_class = {
.name = "mtd",
.owner = THIS_MODULE,
- .suspend = mtd_cls_suspend,
- .resume = mtd_cls_resume,
+ .pm = MTD_CLS_PM_OPS,
};
static DEFINE_IDR(mtd_idr);
@@ -88,22 +108,6 @@ static void mtd_release(struct device *dev)
device_destroy(&mtd_class, index + 1);
}
-static int mtd_cls_suspend(struct device *dev, pm_message_t state)
-{
- struct mtd_info *mtd = dev_get_drvdata(dev);
-
- return mtd ? mtd_suspend(mtd) : 0;
-}
-
-static int mtd_cls_resume(struct device *dev)
-{
- struct mtd_info *mtd = dev_get_drvdata(dev);
-
- if (mtd)
- mtd_resume(mtd);
- return 0;
-}
-
static ssize_t mtd_type_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -375,8 +379,7 @@ static int mtd_reboot_notifier(struct notifier_block *n, unsigned long state,
*
* Add a device to the list of MTD devices present in the system, and
* notify each currently active MTD 'user' of its arrival. Returns
- * zero on success or 1 on failure, which currently will only happen
- * if there is insufficient memory or a sysfs error.
+ * zero on success or non-zero on failure.
*/
int add_mtd_device(struct mtd_info *mtd)
@@ -390,8 +393,10 @@ int add_mtd_device(struct mtd_info *mtd)
mutex_lock(&mtd_table_mutex);
i = idr_alloc(&mtd_idr, mtd, 0, 0, GFP_KERNEL);
- if (i < 0)
+ if (i < 0) {
+ error = i;
goto fail_locked;
+ }
mtd->index = i;
mtd->usecount = 0;
@@ -420,6 +425,8 @@ int add_mtd_device(struct mtd_info *mtd)
printk(KERN_WARNING
"%s: unlock failed, writes may not work\n",
mtd->name);
+ /* Ignore unlock failures? */
+ error = 0;
}
/* Caller should have set dev.parent to match the
@@ -430,7 +437,8 @@ int add_mtd_device(struct mtd_info *mtd)
mtd->dev.devt = MTD_DEVT(i);
dev_set_name(&mtd->dev, "mtd%d", i);
dev_set_drvdata(&mtd->dev, mtd);
- if (device_register(&mtd->dev) != 0)
+ error = device_register(&mtd->dev);
+ if (error)
goto fail_added;
device_create(&mtd_class, mtd->dev.parent, MTD_DEVT(i) + 1, NULL,
@@ -454,7 +462,7 @@ int add_mtd_device(struct mtd_info *mtd)
idr_remove(&mtd_idr, i);
fail_locked:
mutex_unlock(&mtd_table_mutex);
- return 1;
+ return error;
}
/**
@@ -510,8 +518,8 @@ static int mtd_add_device_partitions(struct mtd_info *mtd,
if (nbparts == 0 || IS_ENABLED(CONFIG_MTD_PARTITIONED_MASTER)) {
ret = add_mtd_device(mtd);
- if (ret == 1)
- return -ENODEV;
+ if (ret)
+ return ret;
}
if (nbparts > 0) {
diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
index 5897d8d8fa5a962d896e6726edde207b99575d39..5b2806a7e5f75fe928242bcfdd625d1194738507 100644
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -76,7 +76,7 @@ config MTD_NAND_DENALI_SCRATCH_REG_ADDR
config MTD_NAND_GPIO
tristate "GPIO assisted NAND Flash driver"
- depends on GPIOLIB
+ depends on GPIOLIB || COMPILE_TEST
help
This enables a NAND flash driver where control signals are
connected to GPIO pins, and commands and data are communicated
@@ -394,6 +394,14 @@ config MTD_NAND_GPMI_NAND
block, such as SD card. So pay attention to it when you enable
the GPMI.
+config MTD_NAND_BRCMNAND
+ tristate "Broadcom STB NAND controller"
+ depends on ARM || MIPS
+ help
+ Enables the Broadcom NAND controller driver. The controller was
+ originally designed for Set-Top Box but is used on various BCM7xxx,
+ BCM3xxx, BCM63xxx, iProc/Cygnus and more.
+
config MTD_NAND_BCM47XXNFLASH
tristate "Support for NAND flash on BCM4706 BCMA bus"
depends on BCMA_NFLASH
diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
index 582bbd05aff7ab7df0a20c282bc25faa1532437a..1f897ec3c242a977a52128e37f56ef9431fbd548 100644
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -52,5 +52,6 @@ obj-$(CONFIG_MTD_NAND_XWAY) += xway_nand.o
obj-$(CONFIG_MTD_NAND_BCM47XXNFLASH) += bcm47xxnflash/
obj-$(CONFIG_MTD_NAND_SUNXI) += sunxi_nand.o
obj-$(CONFIG_MTD_NAND_HISI504) += hisi504_nand.o
+obj-$(CONFIG_MTD_NAND_BRCMNAND) += brcmnand/
nand-objs := nand_base.o nand_bbt.o nand_timings.o
diff --git a/drivers/mtd/nand/brcmnand/Makefile b/drivers/mtd/nand/brcmnand/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..3b1fbfd27d4f3ee727ee86e73fd2c128977577f7
--- /dev/null
+++ b/drivers/mtd/nand/brcmnand/Makefile
@@ -0,0 +1,6 @@
+# link order matters; don't link the more generic brcmstb_nand.o before the
+# more specific iproc_nand.o, for instance
+obj-$(CONFIG_MTD_NAND_BRCMNAND) += iproc_nand.o
+obj-$(CONFIG_MTD_NAND_BRCMNAND) += bcm63138_nand.o
+obj-$(CONFIG_MTD_NAND_BRCMNAND) += brcmstb_nand.o
+obj-$(CONFIG_MTD_NAND_BRCMNAND) += brcmnand.o
diff --git a/drivers/mtd/nand/brcmnand/bcm63138_nand.c b/drivers/mtd/nand/brcmnand/bcm63138_nand.c
new file mode 100644
index 0000000000000000000000000000000000000000..3f4c44c24e14e88a999fbeb42ca40e2bb54d8efe
--- /dev/null
+++ b/drivers/mtd/nand/brcmnand/bcm63138_nand.c
@@ -0,0 +1,111 @@
+/*
+ * Copyright © 2015 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/device.h>
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include "brcmnand.h"
+
+struct bcm63138_nand_soc_priv {
+ void __iomem *base;
+};
+
+#define BCM63138_NAND_INT_STATUS 0x00
+#define BCM63138_NAND_INT_EN 0x04
+
+enum {
+ BCM63138_CTLRDY = BIT(4),
+};
+
+static bool bcm63138_nand_intc_ack(struct brcmnand_soc *soc)
+{
+ struct bcm63138_nand_soc_priv *priv = soc->priv;
+ void __iomem *mmio = priv->base + BCM63138_NAND_INT_STATUS;
+ u32 val = brcmnand_readl(mmio);
+
+ if (val & BCM63138_CTLRDY) {
+ brcmnand_writel(val & ~BCM63138_CTLRDY, mmio);
+ return true;
+ }
+
+ return false;
+}
+
+static void bcm63138_nand_intc_set(struct brcmnand_soc *soc, bool en)
+{
+ struct bcm63138_nand_soc_priv *priv = soc->priv;
+ void __iomem *mmio = priv->base + BCM63138_NAND_INT_EN;
+ u32 val = brcmnand_readl(mmio);
+
+ if (en)
+ val |= BCM63138_CTLRDY;
+ else
+ val &= ~BCM63138_CTLRDY;
+
+ brcmnand_writel(val, mmio);
+}
+
+static int bcm63138_nand_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct bcm63138_nand_soc_priv *priv;
+ struct brcmnand_soc *soc;
+ struct resource *res;
+
+ soc = devm_kzalloc(dev, sizeof(*soc), GFP_KERNEL);
+ if (!soc)
+ return -ENOMEM;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nand-int-base");
+ priv->base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(priv->base))
+ return PTR_ERR(priv->base);
+
+ soc->pdev = pdev;
+ soc->priv = priv;
+ soc->ctlrdy_ack = bcm63138_nand_intc_ack;
+ soc->ctlrdy_set_enabled = bcm63138_nand_intc_set;
+
+ return brcmnand_probe(pdev, soc);
+}
+
+static const struct of_device_id bcm63138_nand_of_match[] = {
+ { .compatible = "brcm,nand-bcm63138" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, bcm63138_nand_of_match);
+
+static struct platform_driver bcm63138_nand_driver = {
+ .probe = bcm63138_nand_probe,
+ .remove = brcmnand_remove,
+ .driver = {
+ .name = "bcm63138_nand",
+ .pm = &brcmnand_pm_ops,
+ .of_match_table = bcm63138_nand_of_match,
+ }
+};
+module_platform_driver(bcm63138_nand_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Brian Norris");
+MODULE_DESCRIPTION("NAND driver for BCM63138");
diff --git a/drivers/mtd/nand/brcmnand/brcmnand.c b/drivers/mtd/nand/brcmnand/brcmnand.c
new file mode 100644
index 0000000000000000000000000000000000000000..fddb795eeb710c0580fa22af3d12436039fb18ea
--- /dev/null
+++ b/drivers/mtd/nand/brcmnand/brcmnand.c
@@ -0,0 +1,2246 @@
+/*
+ * Copyright © 2010-2015 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/err.h>
+#include <linux/completion.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/dma-mapping.h>
+#include <linux/ioport.h>
+#include <linux/bug.h>
+#include <linux/kernel.h>
+#include <linux/bitops.h>
+#include <linux/mm.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/partitions.h>
+#include <linux/of.h>
+#include <linux/of_mtd.h>
+#include <linux/of_platform.h>
+#include <linux/slab.h>
+#include <linux/list.h>
+#include <linux/log2.h>
+
+#include "brcmnand.h"
+
+/*
+ * This flag controls if WP stays on between erase/write commands to mitigate
+ * flash corruption due to power glitches. Values:
+ * 0: NAND_WP is not used or not available
+ * 1: NAND_WP is set by default, cleared for erase/write operations
+ * 2: NAND_WP is always cleared
+ */
+static int wp_on = 1;
+module_param(wp_on, int, 0444);
+
+/***********************************************************************
+ * Definitions
+ ***********************************************************************/
+
+#define DRV_NAME "brcmnand"
+
+#define CMD_NULL 0x00
+#define CMD_PAGE_READ 0x01
+#define CMD_SPARE_AREA_READ 0x02
+#define CMD_STATUS_READ 0x03
+#define CMD_PROGRAM_PAGE 0x04
+#define CMD_PROGRAM_SPARE_AREA 0x05
+#define CMD_COPY_BACK 0x06
+#define CMD_DEVICE_ID_READ 0x07
+#define CMD_BLOCK_ERASE 0x08
+#define CMD_FLASH_RESET 0x09
+#define CMD_BLOCKS_LOCK 0x0a
+#define CMD_BLOCKS_LOCK_DOWN 0x0b
+#define CMD_BLOCKS_UNLOCK 0x0c
+#define CMD_READ_BLOCKS_LOCK_STATUS 0x0d
+#define CMD_PARAMETER_READ 0x0e
+#define CMD_PARAMETER_CHANGE_COL 0x0f
+#define CMD_LOW_LEVEL_OP 0x10
+
+struct brcm_nand_dma_desc {
+ u32 next_desc;
+ u32 next_desc_ext;
+ u32 cmd_irq;
+ u32 dram_addr;
+ u32 dram_addr_ext;
+ u32 tfr_len;
+ u32 total_len;
+ u32 flash_addr;
+ u32 flash_addr_ext;
+ u32 cs;
+ u32 pad2[5];
+ u32 status_valid;
+} __packed;
+
+/* Bitfields for brcm_nand_dma_desc::status_valid */
+#define FLASH_DMA_ECC_ERROR (1 << 8)
+#define FLASH_DMA_CORR_ERROR (1 << 9)
+
+/* 512B flash cache in the NAND controller HW */
+#define FC_SHIFT 9U
+#define FC_BYTES 512U
+#define FC_WORDS (FC_BYTES >> 2)
+
+#define BRCMNAND_MIN_PAGESIZE 512
+#define BRCMNAND_MIN_BLOCKSIZE (8 * 1024)
+#define BRCMNAND_MIN_DEVSIZE (4ULL * 1024 * 1024)
+
+/* Controller feature flags */
+enum {
+ BRCMNAND_HAS_1K_SECTORS = BIT(0),
+ BRCMNAND_HAS_PREFETCH = BIT(1),
+ BRCMNAND_HAS_CACHE_MODE = BIT(2),
+ BRCMNAND_HAS_WP = BIT(3),
+};
+
+struct brcmnand_controller {
+ struct device *dev;
+ struct nand_hw_control controller;
+ void __iomem *nand_base;
+ void __iomem *nand_fc; /* flash cache */
+ void __iomem *flash_dma_base;
+ unsigned int irq;
+ unsigned int dma_irq;
+ int nand_version;
+
+ /* Some SoCs provide custom interrupt status register(s) */
+ struct brcmnand_soc *soc;
+
+ int cmd_pending;
+ bool dma_pending;
+ struct completion done;
+ struct completion dma_done;
+
+ /* List of NAND hosts (one for each chip-select) */
+ struct list_head host_list;
+
+ struct brcm_nand_dma_desc *dma_desc;
+ dma_addr_t dma_pa;
+
+ /* in-memory cache of the FLASH_CACHE, used only for some commands */
+ u32 flash_cache[FC_WORDS];
+
+ /* Controller revision details */
+ const u16 *reg_offsets;
+ unsigned int reg_spacing; /* between CS1, CS2, ... regs */
+ const u8 *cs_offsets; /* within each chip-select */
+ const u8 *cs0_offsets; /* within CS0, if different */
+ unsigned int max_block_size;
+ const unsigned int *block_sizes;
+ unsigned int max_page_size;
+ const unsigned int *page_sizes;
+ unsigned int max_oob;
+ u32 features;
+
+ /* for low-power standby/resume only */
+ u32 nand_cs_nand_select;
+ u32 nand_cs_nand_xor;
+ u32 corr_stat_threshold;
+ u32 flash_dma_mode;
+};
+
+struct brcmnand_cfg {
+ u64 device_size;
+ unsigned int block_size;
+ unsigned int page_size;
+ unsigned int spare_area_size;
+ unsigned int device_width;
+ unsigned int col_adr_bytes;
+ unsigned int blk_adr_bytes;
+ unsigned int ful_adr_bytes;
+ unsigned int sector_size_1k;
+ unsigned int ecc_level;
+ /* use for low-power standby/resume only */
+ u32 acc_control;
+ u32 config;
+ u32 config_ext;
+ u32 timing_1;
+ u32 timing_2;
+};
+
+struct brcmnand_host {
+ struct list_head node;
+ struct device_node *of_node;
+
+ struct nand_chip chip;
+ struct mtd_info mtd;
+ struct platform_device *pdev;
+ int cs;
+
+ unsigned int last_cmd;
+ unsigned int last_byte;
+ u64 last_addr;
+ struct brcmnand_cfg hwcfg;
+ struct brcmnand_controller *ctrl;
+};
+
+enum brcmnand_reg {
+ BRCMNAND_CMD_START = 0,
+ BRCMNAND_CMD_EXT_ADDRESS,
+ BRCMNAND_CMD_ADDRESS,
+ BRCMNAND_INTFC_STATUS,
+ BRCMNAND_CS_SELECT,
+ BRCMNAND_CS_XOR,
+ BRCMNAND_LL_OP,
+ BRCMNAND_CS0_BASE,
+ BRCMNAND_CS1_BASE, /* CS1 regs, if non-contiguous */
+ BRCMNAND_CORR_THRESHOLD,
+ BRCMNAND_CORR_THRESHOLD_EXT,
+ BRCMNAND_UNCORR_COUNT,
+ BRCMNAND_CORR_COUNT,
+ BRCMNAND_CORR_EXT_ADDR,
+ BRCMNAND_CORR_ADDR,
+ BRCMNAND_UNCORR_EXT_ADDR,
+ BRCMNAND_UNCORR_ADDR,
+ BRCMNAND_SEMAPHORE,
+ BRCMNAND_ID,
+ BRCMNAND_ID_EXT,
+ BRCMNAND_LL_RDATA,
+ BRCMNAND_OOB_READ_BASE,
+ BRCMNAND_OOB_READ_10_BASE, /* offset 0x10, if non-contiguous */
+ BRCMNAND_OOB_WRITE_BASE,
+ BRCMNAND_OOB_WRITE_10_BASE, /* offset 0x10, if non-contiguous */
+ BRCMNAND_FC_BASE,
+};
+
+/* BRCMNAND v4.0 */
+static const u16 brcmnand_regs_v40[] = {
+ [BRCMNAND_CMD_START] = 0x04,
+ [BRCMNAND_CMD_EXT_ADDRESS] = 0x08,
+ [BRCMNAND_CMD_ADDRESS] = 0x0c,
+ [BRCMNAND_INTFC_STATUS] = 0x6c,
+ [BRCMNAND_CS_SELECT] = 0x14,
+ [BRCMNAND_CS_XOR] = 0x18,
+ [BRCMNAND_LL_OP] = 0x178,
+ [BRCMNAND_CS0_BASE] = 0x40,
+ [BRCMNAND_CS1_BASE] = 0xd0,
+ [BRCMNAND_CORR_THRESHOLD] = 0x84,
+ [BRCMNAND_CORR_THRESHOLD_EXT] = 0,
+ [BRCMNAND_UNCORR_COUNT] = 0,
+ [BRCMNAND_CORR_COUNT] = 0,
+ [BRCMNAND_CORR_EXT_ADDR] = 0x70,
+ [BRCMNAND_CORR_ADDR] = 0x74,
+ [BRCMNAND_UNCORR_EXT_ADDR] = 0x78,
+ [BRCMNAND_UNCORR_ADDR] = 0x7c,
+ [BRCMNAND_SEMAPHORE] = 0x58,
+ [BRCMNAND_ID] = 0x60,
+ [BRCMNAND_ID_EXT] = 0x64,
+ [BRCMNAND_LL_RDATA] = 0x17c,
+ [BRCMNAND_OOB_READ_BASE] = 0x20,
+ [BRCMNAND_OOB_READ_10_BASE] = 0x130,
+ [BRCMNAND_OOB_WRITE_BASE] = 0x30,
+ [BRCMNAND_OOB_WRITE_10_BASE] = 0,
+ [BRCMNAND_FC_BASE] = 0x200,
+};
+
+/* BRCMNAND v5.0 */
+static const u16 brcmnand_regs_v50[] = {
+ [BRCMNAND_CMD_START] = 0x04,
+ [BRCMNAND_CMD_EXT_ADDRESS] = 0x08,
+ [BRCMNAND_CMD_ADDRESS] = 0x0c,
+ [BRCMNAND_INTFC_STATUS] = 0x6c,
+ [BRCMNAND_CS_SELECT] = 0x14,
+ [BRCMNAND_CS_XOR] = 0x18,
+ [BRCMNAND_LL_OP] = 0x178,
+ [BRCMNAND_CS0_BASE] = 0x40,
+ [BRCMNAND_CS1_BASE] = 0xd0,
+ [BRCMNAND_CORR_THRESHOLD] = 0x84,
+ [BRCMNAND_CORR_THRESHOLD_EXT] = 0,
+ [BRCMNAND_UNCORR_COUNT] = 0,
+ [BRCMNAND_CORR_COUNT] = 0,
+ [BRCMNAND_CORR_EXT_ADDR] = 0x70,
+ [BRCMNAND_CORR_ADDR] = 0x74,
+ [BRCMNAND_UNCORR_EXT_ADDR] = 0x78,
+ [BRCMNAND_UNCORR_ADDR] = 0x7c,
+ [BRCMNAND_SEMAPHORE] = 0x58,
+ [BRCMNAND_ID] = 0x60,
+ [BRCMNAND_ID_EXT] = 0x64,
+ [BRCMNAND_LL_RDATA] = 0x17c,
+ [BRCMNAND_OOB_READ_BASE] = 0x20,
+ [BRCMNAND_OOB_READ_10_BASE] = 0x130,
+ [BRCMNAND_OOB_WRITE_BASE] = 0x30,
+ [BRCMNAND_OOB_WRITE_10_BASE] = 0x140,
+ [BRCMNAND_FC_BASE] = 0x200,
+};
+
+/* BRCMNAND v6.0 - v7.1 */
+static const u16 brcmnand_regs_v60[] = {
+ [BRCMNAND_CMD_START] = 0x04,
+ [BRCMNAND_CMD_EXT_ADDRESS] = 0x08,
+ [BRCMNAND_CMD_ADDRESS] = 0x0c,
+ [BRCMNAND_INTFC_STATUS] = 0x14,
+ [BRCMNAND_CS_SELECT] = 0x18,
+ [BRCMNAND_CS_XOR] = 0x1c,
+ [BRCMNAND_LL_OP] = 0x20,
+ [BRCMNAND_CS0_BASE] = 0x50,
+ [BRCMNAND_CS1_BASE] = 0,
+ [BRCMNAND_CORR_THRESHOLD] = 0xc0,
+ [BRCMNAND_CORR_THRESHOLD_EXT] = 0xc4,
+ [BRCMNAND_UNCORR_COUNT] = 0xfc,
+ [BRCMNAND_CORR_COUNT] = 0x100,
+ [BRCMNAND_CORR_EXT_ADDR] = 0x10c,
+ [BRCMNAND_CORR_ADDR] = 0x110,
+ [BRCMNAND_UNCORR_EXT_ADDR] = 0x114,
+ [BRCMNAND_UNCORR_ADDR] = 0x118,
+ [BRCMNAND_SEMAPHORE] = 0x150,
+ [BRCMNAND_ID] = 0x194,
+ [BRCMNAND_ID_EXT] = 0x198,
+ [BRCMNAND_LL_RDATA] = 0x19c,
+ [BRCMNAND_OOB_READ_BASE] = 0x200,
+ [BRCMNAND_OOB_READ_10_BASE] = 0,
+ [BRCMNAND_OOB_WRITE_BASE] = 0x280,
+ [BRCMNAND_OOB_WRITE_10_BASE] = 0,
+ [BRCMNAND_FC_BASE] = 0x400,
+};
+
+enum brcmnand_cs_reg {
+ BRCMNAND_CS_CFG_EXT = 0,
+ BRCMNAND_CS_CFG,
+ BRCMNAND_CS_ACC_CONTROL,
+ BRCMNAND_CS_TIMING1,
+ BRCMNAND_CS_TIMING2,
+};
+
+/* Per chip-select offsets for v7.1 */
+static const u8 brcmnand_cs_offsets_v71[] = {
+ [BRCMNAND_CS_ACC_CONTROL] = 0x00,
+ [BRCMNAND_CS_CFG_EXT] = 0x04,
+ [BRCMNAND_CS_CFG] = 0x08,
+ [BRCMNAND_CS_TIMING1] = 0x0c,
+ [BRCMNAND_CS_TIMING2] = 0x10,
+};
+
+/* Per chip-select offsets for pre v7.1, except CS0 on <= v5.0 */
+static const u8 brcmnand_cs_offsets[] = {
+ [BRCMNAND_CS_ACC_CONTROL] = 0x00,
+ [BRCMNAND_CS_CFG_EXT] = 0x04,
+ [BRCMNAND_CS_CFG] = 0x04,
+ [BRCMNAND_CS_TIMING1] = 0x08,
+ [BRCMNAND_CS_TIMING2] = 0x0c,
+};
+
+/* Per chip-select offset for <= v5.0 on CS0 only */
+static const u8 brcmnand_cs_offsets_cs0[] = {
+ [BRCMNAND_CS_ACC_CONTROL] = 0x00,
+ [BRCMNAND_CS_CFG_EXT] = 0x08,
+ [BRCMNAND_CS_CFG] = 0x08,
+ [BRCMNAND_CS_TIMING1] = 0x10,
+ [BRCMNAND_CS_TIMING2] = 0x14,
+};
+
+/* BRCMNAND_INTFC_STATUS */
+enum {
+ INTFC_FLASH_STATUS = GENMASK(7, 0),
+
+ INTFC_ERASED = BIT(27),
+ INTFC_OOB_VALID = BIT(28),
+ INTFC_CACHE_VALID = BIT(29),
+ INTFC_FLASH_READY = BIT(30),
+ INTFC_CTLR_READY = BIT(31),
+};
+
+static inline u32 nand_readreg(struct brcmnand_controller *ctrl, u32 offs)
+{
+ return brcmnand_readl(ctrl->nand_base + offs);
+}
+
+static inline void nand_writereg(struct brcmnand_controller *ctrl, u32 offs,
+ u32 val)
+{
+ brcmnand_writel(val, ctrl->nand_base + offs);
+}
+
+static int brcmnand_revision_init(struct brcmnand_controller *ctrl)
+{
+ static const unsigned int block_sizes_v6[] = { 8, 16, 128, 256, 512, 1024, 2048, 0 };
+ static const unsigned int block_sizes_v4[] = { 16, 128, 8, 512, 256, 1024, 2048, 0 };
+ static const unsigned int page_sizes[] = { 512, 2048, 4096, 8192, 0 };
+
+ ctrl->nand_version = nand_readreg(ctrl, 0) & 0xffff;
+
+ /* Only support v4.0+? */
+ if (ctrl->nand_version < 0x0400) {
+ dev_err(ctrl->dev, "version %#x not supported\n",
+ ctrl->nand_version);
+ return -ENODEV;
+ }
+
+ /* Register offsets */
+ if (ctrl->nand_version >= 0x0600)
+ ctrl->reg_offsets = brcmnand_regs_v60;
+ else if (ctrl->nand_version >= 0x0500)
+ ctrl->reg_offsets = brcmnand_regs_v50;
+ else if (ctrl->nand_version >= 0x0400)
+ ctrl->reg_offsets = brcmnand_regs_v40;
+
+ /* Chip-select stride */
+ if (ctrl->nand_version >= 0x0701)
+ ctrl->reg_spacing = 0x14;
+ else
+ ctrl->reg_spacing = 0x10;
+
+ /* Per chip-select registers */
+ if (ctrl->nand_version >= 0x0701) {
+ ctrl->cs_offsets = brcmnand_cs_offsets_v71;
+ } else {
+ ctrl->cs_offsets = brcmnand_cs_offsets;
+
+ /* v5.0 and earlier has a different CS0 offset layout */
+ if (ctrl->nand_version <= 0x0500)
+ ctrl->cs0_offsets = brcmnand_cs_offsets_cs0;
+ }
+
+ /* Page / block sizes */
+ if (ctrl->nand_version >= 0x0701) {
+ /* >= v7.1 use nice power-of-2 values! */
+ ctrl->max_page_size = 16 * 1024;
+ ctrl->max_block_size = 2 * 1024 * 1024;
+ } else {
+ ctrl->page_sizes = page_sizes;
+ if (ctrl->nand_version >= 0x0600)
+ ctrl->block_sizes = block_sizes_v6;
+ else
+ ctrl->block_sizes = block_sizes_v4;
+
+ if (ctrl->nand_version < 0x0400) {
+ ctrl->max_page_size = 4096;
+ ctrl->max_block_size = 512 * 1024;
+ }
+ }
+
+ /* Maximum spare area sector size (per 512B) */
+ if (ctrl->nand_version >= 0x0600)
+ ctrl->max_oob = 64;
+ else if (ctrl->nand_version >= 0x0500)
+ ctrl->max_oob = 32;
+ else
+ ctrl->max_oob = 16;
+
+ /* v6.0 and newer (except v6.1) have prefetch support */
+ if (ctrl->nand_version >= 0x0600 && ctrl->nand_version != 0x0601)
+ ctrl->features |= BRCMNAND_HAS_PREFETCH;
+
+ /*
+ * v6.x has cache mode, but it's implemented differently. Ignore it for
+ * now.
+ */
+ if (ctrl->nand_version >= 0x0700)
+ ctrl->features |= BRCMNAND_HAS_CACHE_MODE;
+
+ if (ctrl->nand_version >= 0x0500)
+ ctrl->features |= BRCMNAND_HAS_1K_SECTORS;
+
+ if (ctrl->nand_version >= 0x0700)
+ ctrl->features |= BRCMNAND_HAS_WP;
+ else if (of_property_read_bool(ctrl->dev->of_node, "brcm,nand-has-wp"))
+ ctrl->features |= BRCMNAND_HAS_WP;
+
+ return 0;
+}
+
+static inline u32 brcmnand_read_reg(struct brcmnand_controller *ctrl,
+ enum brcmnand_reg reg)
+{
+ u16 offs = ctrl->reg_offsets[reg];
+
+ if (offs)
+ return nand_readreg(ctrl, offs);
+ else
+ return 0;
+}
+
+static inline void brcmnand_write_reg(struct brcmnand_controller *ctrl,
+ enum brcmnand_reg reg, u32 val)
+{
+ u16 offs = ctrl->reg_offsets[reg];
+
+ if (offs)
+ nand_writereg(ctrl, offs, val);
+}
+
+static inline void brcmnand_rmw_reg(struct brcmnand_controller *ctrl,
+ enum brcmnand_reg reg, u32 mask, unsigned
+ int shift, u32 val)
+{
+ u32 tmp = brcmnand_read_reg(ctrl, reg);
+
+ tmp &= ~mask;
+ tmp |= val << shift;
+ brcmnand_write_reg(ctrl, reg, tmp);
+}
+
+static inline u32 brcmnand_read_fc(struct brcmnand_controller *ctrl, int word)
+{
+ return __raw_readl(ctrl->nand_fc + word * 4);
+}
+
+static inline void brcmnand_write_fc(struct brcmnand_controller *ctrl,
+ int word, u32 val)
+{
+ __raw_writel(val, ctrl->nand_fc + word * 4);
+}
+
+static inline u16 brcmnand_cs_offset(struct brcmnand_controller *ctrl, int cs,
+ enum brcmnand_cs_reg reg)
+{
+ u16 offs_cs0 = ctrl->reg_offsets[BRCMNAND_CS0_BASE];
+ u16 offs_cs1 = ctrl->reg_offsets[BRCMNAND_CS1_BASE];
+ u8 cs_offs;
+
+ if (cs == 0 && ctrl->cs0_offsets)
+ cs_offs = ctrl->cs0_offsets[reg];
+ else
+ cs_offs = ctrl->cs_offsets[reg];
+
+ if (cs && offs_cs1)
+ return offs_cs1 + (cs - 1) * ctrl->reg_spacing + cs_offs;
+
+ return offs_cs0 + cs * ctrl->reg_spacing + cs_offs;
+}
+
+static inline u32 brcmnand_count_corrected(struct brcmnand_controller *ctrl)
+{
+ if (ctrl->nand_version < 0x0600)
+ return 1;
+ return brcmnand_read_reg(ctrl, BRCMNAND_CORR_COUNT);
+}
+
+static void brcmnand_wr_corr_thresh(struct brcmnand_host *host, u8 val)
+{
+ struct brcmnand_controller *ctrl = host->ctrl;
+ unsigned int shift = 0, bits;
+ enum brcmnand_reg reg = BRCMNAND_CORR_THRESHOLD;
+ int cs = host->cs;
+
+ if (ctrl->nand_version >= 0x0600)
+ bits = 6;
+ else if (ctrl->nand_version >= 0x0500)
+ bits = 5;
+ else
+ bits = 4;
+
+ if (ctrl->nand_version >= 0x0600) {
+ if (cs >= 5)
+ reg = BRCMNAND_CORR_THRESHOLD_EXT;
+ shift = (cs % 5) * bits;
+ }
+ brcmnand_rmw_reg(ctrl, reg, (bits - 1) << shift, shift, val);
+}
+
+static inline int brcmnand_cmd_shift(struct brcmnand_controller *ctrl)
+{
+ if (ctrl->nand_version < 0x0700)
+ return 24;
+ return 0;
+}
+
+/***********************************************************************
+ * NAND ACC CONTROL bitfield
+ *
+ * Some bits have remained constant throughout hardware revision, while
+ * others have shifted around.
+ ***********************************************************************/
+
+/* Constant for all versions (where supported) */
+enum {
+ /* See BRCMNAND_HAS_CACHE_MODE */
+ ACC_CONTROL_CACHE_MODE = BIT(22),
+
+ /* See BRCMNAND_HAS_PREFETCH */
+ ACC_CONTROL_PREFETCH = BIT(23),
+
+ ACC_CONTROL_PAGE_HIT = BIT(24),
+ ACC_CONTROL_WR_PREEMPT = BIT(25),
+ ACC_CONTROL_PARTIAL_PAGE = BIT(26),
+ ACC_CONTROL_RD_ERASED = BIT(27),
+ ACC_CONTROL_FAST_PGM_RDIN = BIT(28),
+ ACC_CONTROL_WR_ECC = BIT(30),
+ ACC_CONTROL_RD_ECC = BIT(31),
+};
+
+static inline u32 brcmnand_spare_area_mask(struct brcmnand_controller *ctrl)
+{
+ if (ctrl->nand_version >= 0x0600)
+ return GENMASK(6, 0);
+ else
+ return GENMASK(5, 0);
+}
+
+#define NAND_ACC_CONTROL_ECC_SHIFT 16
+
+static inline u32 brcmnand_ecc_level_mask(struct brcmnand_controller *ctrl)
+{
+ u32 mask = (ctrl->nand_version >= 0x0600) ? 0x1f : 0x0f;
+
+ return mask << NAND_ACC_CONTROL_ECC_SHIFT;
+}
+
+static void brcmnand_set_ecc_enabled(struct brcmnand_host *host, int en)
+{
+ struct brcmnand_controller *ctrl = host->ctrl;
+ u16 offs = brcmnand_cs_offset(ctrl, host->cs, BRCMNAND_CS_ACC_CONTROL);
+ u32 acc_control = nand_readreg(ctrl, offs);
+ u32 ecc_flags = ACC_CONTROL_WR_ECC | ACC_CONTROL_RD_ECC;
+
+ if (en) {
+ acc_control |= ecc_flags; /* enable RD/WR ECC */
+ acc_control |= host->hwcfg.ecc_level
+ << NAND_ACC_CONTROL_ECC_SHIFT;
+ } else {
+ acc_control &= ~ecc_flags; /* disable RD/WR ECC */
+ acc_control &= ~brcmnand_ecc_level_mask(ctrl);
+ }
+
+ nand_writereg(ctrl, offs, acc_control);
+}
+
+static inline int brcmnand_sector_1k_shift(struct brcmnand_controller *ctrl)
+{
+ if (ctrl->nand_version >= 0x0600)
+ return 7;
+ else if (ctrl->nand_version >= 0x0500)
+ return 6;
+ else
+ return -1;
+}
+
+static int brcmnand_get_sector_size_1k(struct brcmnand_host *host)
+{
+ struct brcmnand_controller *ctrl = host->ctrl;
+ int shift = brcmnand_sector_1k_shift(ctrl);
+ u16 acc_control_offs = brcmnand_cs_offset(ctrl, host->cs,
+ BRCMNAND_CS_ACC_CONTROL);
+
+ if (shift < 0)
+ return 0;
+
+ return (nand_readreg(ctrl, acc_control_offs) >> shift) & 0x1;
+}
+
+static void brcmnand_set_sector_size_1k(struct brcmnand_host *host, int val)
+{
+ struct brcmnand_controller *ctrl = host->ctrl;
+ int shift = brcmnand_sector_1k_shift(ctrl);
+ u16 acc_control_offs = brcmnand_cs_offset(ctrl, host->cs,
+ BRCMNAND_CS_ACC_CONTROL);
+ u32 tmp;
+
+ if (shift < 0)
+ return;
+
+ tmp = nand_readreg(ctrl, acc_control_offs);
+ tmp &= ~(1 << shift);
+ tmp |= (!!val) << shift;
+ nand_writereg(ctrl, acc_control_offs, tmp);
+}
+
+/***********************************************************************
+ * CS_NAND_SELECT
+ ***********************************************************************/
+
+enum {
+ CS_SELECT_NAND_WP = BIT(29),
+ CS_SELECT_AUTO_DEVICE_ID_CFG = BIT(30),
+};
+
+static inline void brcmnand_set_wp(struct brcmnand_controller *ctrl, bool en)
+{
+ u32 val = en ? CS_SELECT_NAND_WP : 0;
+
+ brcmnand_rmw_reg(ctrl, BRCMNAND_CS_SELECT, CS_SELECT_NAND_WP, 0, val);
+}
+
+/***********************************************************************
+ * Flash DMA
+ ***********************************************************************/
+
+enum flash_dma_reg {
+ FLASH_DMA_REVISION = 0x00,
+ FLASH_DMA_FIRST_DESC = 0x04,
+ FLASH_DMA_FIRST_DESC_EXT = 0x08,
+ FLASH_DMA_CTRL = 0x0c,
+ FLASH_DMA_MODE = 0x10,
+ FLASH_DMA_STATUS = 0x14,
+ FLASH_DMA_INTERRUPT_DESC = 0x18,
+ FLASH_DMA_INTERRUPT_DESC_EXT = 0x1c,
+ FLASH_DMA_ERROR_STATUS = 0x20,
+ FLASH_DMA_CURRENT_DESC = 0x24,
+ FLASH_DMA_CURRENT_DESC_EXT = 0x28,
+};
+
+static inline bool has_flash_dma(struct brcmnand_controller *ctrl)
+{
+ return ctrl->flash_dma_base;
+}
+
+static inline bool flash_dma_buf_ok(const void *buf)
+{
+ return buf && !is_vmalloc_addr(buf) &&
+ likely(IS_ALIGNED((uintptr_t)buf, 4));
+}
+
+static inline void flash_dma_writel(struct brcmnand_controller *ctrl, u8 offs,
+ u32 val)
+{
+ brcmnand_writel(val, ctrl->flash_dma_base + offs);
+}
+
+static inline u32 flash_dma_readl(struct brcmnand_controller *ctrl, u8 offs)
+{
+ return brcmnand_readl(ctrl->flash_dma_base + offs);
+}
+
+/* Low-level operation types: command, address, write, or read */
+enum brcmnand_llop_type {
+ LL_OP_CMD,
+ LL_OP_ADDR,
+ LL_OP_WR,
+ LL_OP_RD,
+};
+
+/***********************************************************************
+ * Internal support functions
+ ***********************************************************************/
+
+static inline bool is_hamming_ecc(struct brcmnand_cfg *cfg)
+{
+ return cfg->sector_size_1k == 0 && cfg->spare_area_size == 16 &&
+ cfg->ecc_level == 15;
+}
+
+/*
+ * Returns a nand_ecclayout strucutre for the given layout/configuration.
+ * Returns NULL on failure.
+ */
+static struct nand_ecclayout *brcmnand_create_layout(int ecc_level,
+ struct brcmnand_host *host)
+{
+ struct brcmnand_cfg *cfg = &host->hwcfg;
+ int i, j;
+ struct nand_ecclayout *layout;
+ int req;
+ int sectors;
+ int sas;
+ int idx1, idx2;
+
+ layout = devm_kzalloc(&host->pdev->dev, sizeof(*layout), GFP_KERNEL);
+ if (!layout)
+ return NULL;
+
+ sectors = cfg->page_size / (512 << cfg->sector_size_1k);
+ sas = cfg->spare_area_size << cfg->sector_size_1k;
+
+ /* Hamming */
+ if (is_hamming_ecc(cfg)) {
+ for (i = 0, idx1 = 0, idx2 = 0; i < sectors; i++) {
+ /* First sector of each page may have BBI */
+ if (i == 0) {
+ layout->oobfree[idx2].offset = i * sas + 1;
+ /* Small-page NAND use byte 6 for BBI */
+ if (cfg->page_size == 512)
+ layout->oobfree[idx2].offset--;
+ layout->oobfree[idx2].length = 5;
+ } else {
+ layout->oobfree[idx2].offset = i * sas;
+ layout->oobfree[idx2].length = 6;
+ }
+ idx2++;
+ layout->eccpos[idx1++] = i * sas + 6;
+ layout->eccpos[idx1++] = i * sas + 7;
+ layout->eccpos[idx1++] = i * sas + 8;
+ layout->oobfree[idx2].offset = i * sas + 9;
+ layout->oobfree[idx2].length = 7;
+ idx2++;
+ /* Leave zero-terminated entry for OOBFREE */
+ if (idx1 >= MTD_MAX_ECCPOS_ENTRIES_LARGE ||
+ idx2 >= MTD_MAX_OOBFREE_ENTRIES_LARGE - 1)
+ break;
+ }
+ goto out;
+ }
+
+ /*
+ * CONTROLLER_VERSION:
+ * < v5.0: ECC_REQ = ceil(BCH_T * 13/8)
+ * >= v5.0: ECC_REQ = ceil(BCH_T * 14/8)
+ * But we will just be conservative.
+ */
+ req = DIV_ROUND_UP(ecc_level * 14, 8);
+ if (req >= sas) {
+ dev_err(&host->pdev->dev,
+ "error: ECC too large for OOB (ECC bytes %d, spare sector %d)\n",
+ req, sas);
+ return NULL;
+ }
+
+ layout->eccbytes = req * sectors;
+ for (i = 0, idx1 = 0, idx2 = 0; i < sectors; i++) {
+ for (j = sas - req; j < sas && idx1 <
+ MTD_MAX_ECCPOS_ENTRIES_LARGE; j++, idx1++)
+ layout->eccpos[idx1] = i * sas + j;
+
+ /* First sector of each page may have BBI */
+ if (i == 0) {
+ if (cfg->page_size == 512 && (sas - req >= 6)) {
+ /* Small-page NAND use byte 6 for BBI */
+ layout->oobfree[idx2].offset = 0;
+ layout->oobfree[idx2].length = 5;
+ idx2++;
+ if (sas - req > 6) {
+ layout->oobfree[idx2].offset = 6;
+ layout->oobfree[idx2].length =
+ sas - req - 6;
+ idx2++;
+ }
+ } else if (sas > req + 1) {
+ layout->oobfree[idx2].offset = i * sas + 1;
+ layout->oobfree[idx2].length = sas - req - 1;
+ idx2++;
+ }
+ } else if (sas > req) {
+ layout->oobfree[idx2].offset = i * sas;
+ layout->oobfree[idx2].length = sas - req;
+ idx2++;
+ }
+ /* Leave zero-terminated entry for OOBFREE */
+ if (idx1 >= MTD_MAX_ECCPOS_ENTRIES_LARGE ||
+ idx2 >= MTD_MAX_OOBFREE_ENTRIES_LARGE - 1)
+ break;
+ }
+out:
+ /* Sum available OOB */
+ for (i = 0; i < MTD_MAX_OOBFREE_ENTRIES_LARGE; i++)
+ layout->oobavail += layout->oobfree[i].length;
+ return layout;
+}
+
+static struct nand_ecclayout *brcmstb_choose_ecc_layout(
+ struct brcmnand_host *host)
+{
+ struct nand_ecclayout *layout;
+ struct brcmnand_cfg *p = &host->hwcfg;
+ unsigned int ecc_level = p->ecc_level;
+
+ if (p->sector_size_1k)
+ ecc_level <<= 1;
+
+ layout = brcmnand_create_layout(ecc_level, host);
+ if (!layout) {
+ dev_err(&host->pdev->dev,
+ "no proper ecc_layout for this NAND cfg\n");
+ return NULL;
+ }
+
+ return layout;
+}
+
+static void brcmnand_wp(struct mtd_info *mtd, int wp)
+{
+ struct nand_chip *chip = mtd->priv;
+ struct brcmnand_host *host = chip->priv;
+ struct brcmnand_controller *ctrl = host->ctrl;
+
+ if ((ctrl->features & BRCMNAND_HAS_WP) && wp_on == 1) {
+ static int old_wp = -1;
+
+ if (old_wp != wp) {
+ dev_dbg(ctrl->dev, "WP %s\n", wp ? "on" : "off");
+ old_wp = wp;
+ }
+ brcmnand_set_wp(ctrl, wp);
+ }
+}
+
+/* Helper functions for reading and writing OOB registers */
+static inline u8 oob_reg_read(struct brcmnand_controller *ctrl, u32 offs)
+{
+ u16 offset0, offset10, reg_offs;
+
+ offset0 = ctrl->reg_offsets[BRCMNAND_OOB_READ_BASE];
+ offset10 = ctrl->reg_offsets[BRCMNAND_OOB_READ_10_BASE];
+
+ if (offs >= ctrl->max_oob)
+ return 0x77;
+
+ if (offs >= 16 && offset10)
+ reg_offs = offset10 + ((offs - 0x10) & ~0x03);
+ else
+ reg_offs = offset0 + (offs & ~0x03);
+
+ return nand_readreg(ctrl, reg_offs) >> (24 - ((offs & 0x03) << 3));
+}
+
+static inline void oob_reg_write(struct brcmnand_controller *ctrl, u32 offs,
+ u32 data)
+{
+ u16 offset0, offset10, reg_offs;
+
+ offset0 = ctrl->reg_offsets[BRCMNAND_OOB_WRITE_BASE];
+ offset10 = ctrl->reg_offsets[BRCMNAND_OOB_WRITE_10_BASE];
+
+ if (offs >= ctrl->max_oob)
+ return;
+
+ if (offs >= 16 && offset10)
+ reg_offs = offset10 + ((offs - 0x10) & ~0x03);
+ else
+ reg_offs = offset0 + (offs & ~0x03);
+
+ nand_writereg(ctrl, reg_offs, data);
+}
+
+/*
+ * read_oob_from_regs - read data from OOB registers
+ * @ctrl: NAND controller
+ * @i: sub-page sector index
+ * @oob: buffer to read to
+ * @sas: spare area sector size (i.e., OOB size per FLASH_CACHE)
+ * @sector_1k: 1 for 1KiB sectors, 0 for 512B, other values are illegal
+ */
+static int read_oob_from_regs(struct brcmnand_controller *ctrl, int i, u8 *oob,
+ int sas, int sector_1k)
+{
+ int tbytes = sas << sector_1k;
+ int j;
+
+ /* Adjust OOB values for 1K sector size */
+ if (sector_1k && (i & 0x01))
+ tbytes = max(0, tbytes - (int)ctrl->max_oob);
+ tbytes = min_t(int, tbytes, ctrl->max_oob);
+
+ for (j = 0; j < tbytes; j++)
+ oob[j] = oob_reg_read(ctrl, j);
+ return tbytes;
+}
+
+/*
+ * write_oob_to_regs - write data to OOB registers
+ * @i: sub-page sector index
+ * @oob: buffer to write from
+ * @sas: spare area sector size (i.e., OOB size per FLASH_CACHE)
+ * @sector_1k: 1 for 1KiB sectors, 0 for 512B, other values are illegal
+ */
+static int write_oob_to_regs(struct brcmnand_controller *ctrl, int i,
+ const u8 *oob, int sas, int sector_1k)
+{
+ int tbytes = sas << sector_1k;
+ int j;
+
+ /* Adjust OOB values for 1K sector size */
+ if (sector_1k && (i & 0x01))
+ tbytes = max(0, tbytes - (int)ctrl->max_oob);
+ tbytes = min_t(int, tbytes, ctrl->max_oob);
+
+ for (j = 0; j < tbytes; j += 4)
+ oob_reg_write(ctrl, j,
+ (oob[j + 0] << 24) |
+ (oob[j + 1] << 16) |
+ (oob[j + 2] << 8) |
+ (oob[j + 3] << 0));
+ return tbytes;
+}
+
+static irqreturn_t brcmnand_ctlrdy_irq(int irq, void *data)
+{
+ struct brcmnand_controller *ctrl = data;
+
+ /* Discard all NAND_CTLRDY interrupts during DMA */
+ if (ctrl->dma_pending)
+ return IRQ_HANDLED;
+
+ complete(&ctrl->done);
+ return IRQ_HANDLED;
+}
+
+/* Handle SoC-specific interrupt hardware */
+static irqreturn_t brcmnand_irq(int irq, void *data)
+{
+ struct brcmnand_controller *ctrl = data;
+
+ if (ctrl->soc->ctlrdy_ack(ctrl->soc))
+ return brcmnand_ctlrdy_irq(irq, data);
+
+ return IRQ_NONE;
+}
+
+static irqreturn_t brcmnand_dma_irq(int irq, void *data)
+{
+ struct brcmnand_controller *ctrl = data;
+
+ complete(&ctrl->dma_done);
+
+ return IRQ_HANDLED;
+}
+
+static void brcmnand_send_cmd(struct brcmnand_host *host, int cmd)
+{
+ struct brcmnand_controller *ctrl = host->ctrl;
+ u32 intfc;
+
+ dev_dbg(ctrl->dev, "send native cmd %d addr_lo 0x%x\n", cmd,
+ brcmnand_read_reg(ctrl, BRCMNAND_CMD_ADDRESS));
+ BUG_ON(ctrl->cmd_pending != 0);
+ ctrl->cmd_pending = cmd;
+
+ intfc = brcmnand_read_reg(ctrl, BRCMNAND_INTFC_STATUS);
+ BUG_ON(!(intfc & INTFC_CTLR_READY));
+
+ mb(); /* flush previous writes */
+ brcmnand_write_reg(ctrl, BRCMNAND_CMD_START,
+ cmd << brcmnand_cmd_shift(ctrl));
+}
+
+/***********************************************************************
+ * NAND MTD API: read/program/erase
+ ***********************************************************************/
+
+static void brcmnand_cmd_ctrl(struct mtd_info *mtd, int dat,
+ unsigned int ctrl)
+{
+ /* intentionally left blank */
+}
+
+static int brcmnand_waitfunc(struct mtd_info *mtd, struct nand_chip *this)
+{
+ struct nand_chip *chip = mtd->priv;
+ struct brcmnand_host *host = chip->priv;
+ struct brcmnand_controller *ctrl = host->ctrl;
+ unsigned long timeo = msecs_to_jiffies(100);
+
+ dev_dbg(ctrl->dev, "wait on native cmd %d\n", ctrl->cmd_pending);
+ if (ctrl->cmd_pending &&
+ wait_for_completion_timeout(&ctrl->done, timeo) <= 0) {
+ u32 cmd = brcmnand_read_reg(ctrl, BRCMNAND_CMD_START)
+ >> brcmnand_cmd_shift(ctrl);
+
+ dev_err_ratelimited(ctrl->dev,
+ "timeout waiting for command %#02x\n", cmd);
+ dev_err_ratelimited(ctrl->dev, "intfc status %08x\n",
+ brcmnand_read_reg(ctrl, BRCMNAND_INTFC_STATUS));
+ }
+ ctrl->cmd_pending = 0;
+ return brcmnand_read_reg(ctrl, BRCMNAND_INTFC_STATUS) &
+ INTFC_FLASH_STATUS;
+}
+
+enum {
+ LLOP_RE = BIT(16),
+ LLOP_WE = BIT(17),
+ LLOP_ALE = BIT(18),
+ LLOP_CLE = BIT(19),
+ LLOP_RETURN_IDLE = BIT(31),
+
+ LLOP_DATA_MASK = GENMASK(15, 0),
+};
+
+static int brcmnand_low_level_op(struct brcmnand_host *host,
+ enum brcmnand_llop_type type, u32 data,
+ bool last_op)
+{
+ struct mtd_info *mtd = &host->mtd;
+ struct nand_chip *chip = &host->chip;
+ struct brcmnand_controller *ctrl = host->ctrl;
+ u32 tmp;
+
+ tmp = data & LLOP_DATA_MASK;
+ switch (type) {
+ case LL_OP_CMD:
+ tmp |= LLOP_WE | LLOP_CLE;
+ break;
+ case LL_OP_ADDR:
+ /* WE | ALE */
+ tmp |= LLOP_WE | LLOP_ALE;
+ break;
+ case LL_OP_WR:
+ /* WE */
+ tmp |= LLOP_WE;
+ break;
+ case LL_OP_RD:
+ /* RE */
+ tmp |= LLOP_RE;
+ break;
+ }
+ if (last_op)
+ /* RETURN_IDLE */
+ tmp |= LLOP_RETURN_IDLE;
+
+ dev_dbg(ctrl->dev, "ll_op cmd %#x\n", tmp);
+
+ brcmnand_write_reg(ctrl, BRCMNAND_LL_OP, tmp);
+ (void)brcmnand_read_reg(ctrl, BRCMNAND_LL_OP);
+
+ brcmnand_send_cmd(host, CMD_LOW_LEVEL_OP);
+ return brcmnand_waitfunc(mtd, chip);
+}
+
+static void brcmnand_cmdfunc(struct mtd_info *mtd, unsigned command,
+ int column, int page_addr)
+{
+ struct nand_chip *chip = mtd->priv;
+ struct brcmnand_host *host = chip->priv;
+ struct brcmnand_controller *ctrl = host->ctrl;
+ u64 addr = (u64)page_addr << chip->page_shift;
+ int native_cmd = 0;
+
+ if (command == NAND_CMD_READID || command == NAND_CMD_PARAM ||
+ command == NAND_CMD_RNDOUT)
+ addr = (u64)column;
+ /* Avoid propagating a negative, don't-care address */
+ else if (page_addr < 0)
+ addr = 0;
+
+ dev_dbg(ctrl->dev, "cmd 0x%x addr 0x%llx\n", command,
+ (unsigned long long)addr);
+
+ host->last_cmd = command;
+ host->last_byte = 0;
+ host->last_addr = addr;
+
+ switch (command) {
+ case NAND_CMD_RESET:
+ native_cmd = CMD_FLASH_RESET;
+ break;
+ case NAND_CMD_STATUS:
+ native_cmd = CMD_STATUS_READ;
+ break;
+ case NAND_CMD_READID:
+ native_cmd = CMD_DEVICE_ID_READ;
+ break;
+ case NAND_CMD_READOOB:
+ native_cmd = CMD_SPARE_AREA_READ;
+ break;
+ case NAND_CMD_ERASE1:
+ native_cmd = CMD_BLOCK_ERASE;
+ brcmnand_wp(mtd, 0);
+ break;
+ case NAND_CMD_PARAM:
+ native_cmd = CMD_PARAMETER_READ;
+ break;
+ case NAND_CMD_SET_FEATURES:
+ case NAND_CMD_GET_FEATURES:
+ brcmnand_low_level_op(host, LL_OP_CMD, command, false);
+ brcmnand_low_level_op(host, LL_OP_ADDR, column, false);
+ break;
+ case NAND_CMD_RNDOUT:
+ native_cmd = CMD_PARAMETER_CHANGE_COL;
+ addr &= ~((u64)(FC_BYTES - 1));
+ /*
+ * HW quirk: PARAMETER_CHANGE_COL requires SECTOR_SIZE_1K=0
+ * NB: hwcfg.sector_size_1k may not be initialized yet
+ */
+ if (brcmnand_get_sector_size_1k(host)) {
+ host->hwcfg.sector_size_1k =
+ brcmnand_get_sector_size_1k(host);
+ brcmnand_set_sector_size_1k(host, 0);
+ }
+ break;
+ }
+
+ if (!native_cmd)
+ return;
+
+ brcmnand_write_reg(ctrl, BRCMNAND_CMD_EXT_ADDRESS,
+ (host->cs << 16) | ((addr >> 32) & 0xffff));
+ (void)brcmnand_read_reg(ctrl, BRCMNAND_CMD_EXT_ADDRESS);
+ brcmnand_write_reg(ctrl, BRCMNAND_CMD_ADDRESS, lower_32_bits(addr));
+ (void)brcmnand_read_reg(ctrl, BRCMNAND_CMD_ADDRESS);
+
+ brcmnand_send_cmd(host, native_cmd);
+ brcmnand_waitfunc(mtd, chip);
+
+ if (native_cmd == CMD_PARAMETER_READ ||
+ native_cmd == CMD_PARAMETER_CHANGE_COL) {
+ int i;
+
+ brcmnand_soc_data_bus_prepare(ctrl->soc);
+
+ /*
+ * Must cache the FLASH_CACHE now, since changes in
+ * SECTOR_SIZE_1K may invalidate it
+ */
+ for (i = 0; i < FC_WORDS; i++)
+ ctrl->flash_cache[i] = brcmnand_read_fc(ctrl, i);
+
+ brcmnand_soc_data_bus_unprepare(ctrl->soc);
+
+ /* Cleanup from HW quirk: restore SECTOR_SIZE_1K */
+ if (host->hwcfg.sector_size_1k)
+ brcmnand_set_sector_size_1k(host,
+ host->hwcfg.sector_size_1k);
+ }
+
+ /* Re-enable protection is necessary only after erase */
+ if (command == NAND_CMD_ERASE1)
+ brcmnand_wp(mtd, 1);
+}
+
+static uint8_t brcmnand_read_byte(struct mtd_info *mtd)
+{
+ struct nand_chip *chip = mtd->priv;
+ struct brcmnand_host *host = chip->priv;
+ struct brcmnand_controller *ctrl = host->ctrl;
+ uint8_t ret = 0;
+ int addr, offs;
+
+ switch (host->last_cmd) {
+ case NAND_CMD_READID:
+ if (host->last_byte < 4)
+ ret = brcmnand_read_reg(ctrl, BRCMNAND_ID) >>
+ (24 - (host->last_byte << 3));
+ else if (host->last_byte < 8)
+ ret = brcmnand_read_reg(ctrl, BRCMNAND_ID_EXT) >>
+ (56 - (host->last_byte << 3));
+ break;
+
+ case NAND_CMD_READOOB:
+ ret = oob_reg_read(ctrl, host->last_byte);
+ break;
+
+ case NAND_CMD_STATUS:
+ ret = brcmnand_read_reg(ctrl, BRCMNAND_INTFC_STATUS) &
+ INTFC_FLASH_STATUS;
+ if (wp_on) /* hide WP status */
+ ret |= NAND_STATUS_WP;
+ break;
+
+ case NAND_CMD_PARAM:
+ case NAND_CMD_RNDOUT:
+ addr = host->last_addr + host->last_byte;
+ offs = addr & (FC_BYTES - 1);
+
+ /* At FC_BYTES boundary, switch to next column */
+ if (host->last_byte > 0 && offs == 0)
+ chip->cmdfunc(mtd, NAND_CMD_RNDOUT, addr, -1);
+
+ ret = ctrl->flash_cache[offs >> 2] >>
+ (24 - ((offs & 0x03) << 3));
+ break;
+ case NAND_CMD_GET_FEATURES:
+ if (host->last_byte >= ONFI_SUBFEATURE_PARAM_LEN) {
+ ret = 0;
+ } else {
+ bool last = host->last_byte ==
+ ONFI_SUBFEATURE_PARAM_LEN - 1;
+ brcmnand_low_level_op(host, LL_OP_RD, 0, last);
+ ret = brcmnand_read_reg(ctrl, BRCMNAND_LL_RDATA) & 0xff;
+ }
+ }
+
+ dev_dbg(ctrl->dev, "read byte = 0x%02x\n", ret);
+ host->last_byte++;
+
+ return ret;
+}
+
+static void brcmnand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
+{
+ int i;
+
+ for (i = 0; i < len; i++, buf++)
+ *buf = brcmnand_read_byte(mtd);
+}
+
+static void brcmnand_write_buf(struct mtd_info *mtd, const uint8_t *buf,
+ int len)
+{
+ int i;
+ struct nand_chip *chip = mtd->priv;
+ struct brcmnand_host *host = chip->priv;
+
+ switch (host->last_cmd) {
+ case NAND_CMD_SET_FEATURES:
+ for (i = 0; i < len; i++)
+ brcmnand_low_level_op(host, LL_OP_WR, buf[i],
+ (i + 1) == len);
+ break;
+ default:
+ BUG();
+ break;
+ }
+}
+
+/**
+ * Construct a FLASH_DMA descriptor as part of a linked list. You must know the
+ * following ahead of time:
+ * - Is this descriptor the beginning or end of a linked list?
+ * - What is the (DMA) address of the next descriptor in the linked list?
+ */
+static int brcmnand_fill_dma_desc(struct brcmnand_host *host,
+ struct brcm_nand_dma_desc *desc, u64 addr,
+ dma_addr_t buf, u32 len, u8 dma_cmd,
+ bool begin, bool end,
+ dma_addr_t next_desc)
+{
+ memset(desc, 0, sizeof(*desc));
+ /* Descriptors are written in native byte order (wordwise) */
+ desc->next_desc = lower_32_bits(next_desc);
+ desc->next_desc_ext = upper_32_bits(next_desc);
+ desc->cmd_irq = (dma_cmd << 24) |
+ (end ? (0x03 << 8) : 0) | /* IRQ | STOP */
+ (!!begin) | ((!!end) << 1); /* head, tail */
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ desc->cmd_irq |= 0x01 << 12;
+#endif
+ desc->dram_addr = lower_32_bits(buf);
+ desc->dram_addr_ext = upper_32_bits(buf);
+ desc->tfr_len = len;
+ desc->total_len = len;
+ desc->flash_addr = lower_32_bits(addr);
+ desc->flash_addr_ext = upper_32_bits(addr);
+ desc->cs = host->cs;
+ desc->status_valid = 0x01;
+ return 0;
+}
+
+/**
+ * Kick the FLASH_DMA engine, with a given DMA descriptor
+ */
+static void brcmnand_dma_run(struct brcmnand_host *host, dma_addr_t desc)
+{
+ struct brcmnand_controller *ctrl = host->ctrl;
+ unsigned long timeo = msecs_to_jiffies(100);
+
+ flash_dma_writel(ctrl, FLASH_DMA_FIRST_DESC, lower_32_bits(desc));
+ (void)flash_dma_readl(ctrl, FLASH_DMA_FIRST_DESC);
+ flash_dma_writel(ctrl, FLASH_DMA_FIRST_DESC_EXT, upper_32_bits(desc));
+ (void)flash_dma_readl(ctrl, FLASH_DMA_FIRST_DESC_EXT);
+
+ /* Start FLASH_DMA engine */
+ ctrl->dma_pending = true;
+ mb(); /* flush previous writes */
+ flash_dma_writel(ctrl, FLASH_DMA_CTRL, 0x03); /* wake | run */
+
+ if (wait_for_completion_timeout(&ctrl->dma_done, timeo) <= 0) {
+ dev_err(ctrl->dev,
+ "timeout waiting for DMA; status %#x, error status %#x\n",
+ flash_dma_readl(ctrl, FLASH_DMA_STATUS),
+ flash_dma_readl(ctrl, FLASH_DMA_ERROR_STATUS));
+ }
+ ctrl->dma_pending = false;
+ flash_dma_writel(ctrl, FLASH_DMA_CTRL, 0); /* force stop */
+}
+
+static int brcmnand_dma_trans(struct brcmnand_host *host, u64 addr, u32 *buf,
+ u32 len, u8 dma_cmd)
+{
+ struct brcmnand_controller *ctrl = host->ctrl;
+ dma_addr_t buf_pa;
+ int dir = dma_cmd == CMD_PAGE_READ ? DMA_FROM_DEVICE : DMA_TO_DEVICE;
+
+ buf_pa = dma_map_single(ctrl->dev, buf, len, dir);
+ if (dma_mapping_error(ctrl->dev, buf_pa)) {
+ dev_err(ctrl->dev, "unable to map buffer for DMA\n");
+ return -ENOMEM;
+ }
+
+ brcmnand_fill_dma_desc(host, ctrl->dma_desc, addr, buf_pa, len,
+ dma_cmd, true, true, 0);
+
+ brcmnand_dma_run(host, ctrl->dma_pa);
+
+ dma_unmap_single(ctrl->dev, buf_pa, len, dir);
+
+ if (ctrl->dma_desc->status_valid & FLASH_DMA_ECC_ERROR)
+ return -EBADMSG;
+ else if (ctrl->dma_desc->status_valid & FLASH_DMA_CORR_ERROR)
+ return -EUCLEAN;
+
+ return 0;
+}
+
+/*
+ * Assumes proper CS is already set
+ */
+static int brcmnand_read_by_pio(struct mtd_info *mtd, struct nand_chip *chip,
+ u64 addr, unsigned int trans, u32 *buf,
+ u8 *oob, u64 *err_addr)
+{
+ struct brcmnand_host *host = chip->priv;
+ struct brcmnand_controller *ctrl = host->ctrl;
+ int i, j, ret = 0;
+
+ /* Clear error addresses */
+ brcmnand_write_reg(ctrl, BRCMNAND_UNCORR_ADDR, 0);
+ brcmnand_write_reg(ctrl, BRCMNAND_CORR_ADDR, 0);
+
+ brcmnand_write_reg(ctrl, BRCMNAND_CMD_EXT_ADDRESS,
+ (host->cs << 16) | ((addr >> 32) & 0xffff));
+ (void)brcmnand_read_reg(ctrl, BRCMNAND_CMD_EXT_ADDRESS);
+
+ for (i = 0; i < trans; i++, addr += FC_BYTES) {
+ brcmnand_write_reg(ctrl, BRCMNAND_CMD_ADDRESS,
+ lower_32_bits(addr));
+ (void)brcmnand_read_reg(ctrl, BRCMNAND_CMD_ADDRESS);
+ /* SPARE_AREA_READ does not use ECC, so just use PAGE_READ */
+ brcmnand_send_cmd(host, CMD_PAGE_READ);
+ brcmnand_waitfunc(mtd, chip);
+
+ if (likely(buf)) {
+ brcmnand_soc_data_bus_prepare(ctrl->soc);
+
+ for (j = 0; j < FC_WORDS; j++, buf++)
+ *buf = brcmnand_read_fc(ctrl, j);
+
+ brcmnand_soc_data_bus_unprepare(ctrl->soc);
+ }
+
+ if (oob)
+ oob += read_oob_from_regs(ctrl, i, oob,
+ mtd->oobsize / trans,
+ host->hwcfg.sector_size_1k);
+
+ if (!ret) {
+ *err_addr = brcmnand_read_reg(ctrl,
+ BRCMNAND_UNCORR_ADDR) |
+ ((u64)(brcmnand_read_reg(ctrl,
+ BRCMNAND_UNCORR_EXT_ADDR)
+ & 0xffff) << 32);
+ if (*err_addr)
+ ret = -EBADMSG;
+ }
+
+ if (!ret) {
+ *err_addr = brcmnand_read_reg(ctrl,
+ BRCMNAND_CORR_ADDR) |
+ ((u64)(brcmnand_read_reg(ctrl,
+ BRCMNAND_CORR_EXT_ADDR)
+ & 0xffff) << 32);
+ if (*err_addr)
+ ret = -EUCLEAN;
+ }
+ }
+
+ return ret;
+}
+
+static int brcmnand_read(struct mtd_info *mtd, struct nand_chip *chip,
+ u64 addr, unsigned int trans, u32 *buf, u8 *oob)
+{
+ struct brcmnand_host *host = chip->priv;
+ struct brcmnand_controller *ctrl = host->ctrl;
+ u64 err_addr = 0;
+ int err;
+
+ dev_dbg(ctrl->dev, "read %llx -> %p\n", (unsigned long long)addr, buf);
+
+ brcmnand_write_reg(ctrl, BRCMNAND_UNCORR_COUNT, 0);
+
+ if (has_flash_dma(ctrl) && !oob && flash_dma_buf_ok(buf)) {
+ err = brcmnand_dma_trans(host, addr, buf, trans * FC_BYTES,
+ CMD_PAGE_READ);
+ if (err) {
+ if (mtd_is_bitflip_or_eccerr(err))
+ err_addr = addr;
+ else
+ return -EIO;
+ }
+ } else {
+ if (oob)
+ memset(oob, 0x99, mtd->oobsize);
+
+ err = brcmnand_read_by_pio(mtd, chip, addr, trans, buf,
+ oob, &err_addr);
+ }
+
+ if (mtd_is_eccerr(err)) {
+ dev_dbg(ctrl->dev, "uncorrectable error at 0x%llx\n",
+ (unsigned long long)err_addr);
+ mtd->ecc_stats.failed++;
+ /* NAND layer expects zero on ECC errors */
+ return 0;
+ }
+
+ if (mtd_is_bitflip(err)) {
+ unsigned int corrected = brcmnand_count_corrected(ctrl);
+
+ dev_dbg(ctrl->dev, "corrected error at 0x%llx\n",
+ (unsigned long long)err_addr);
+ mtd->ecc_stats.corrected += corrected;
+ /* Always exceed the software-imposed threshold */
+ return max(mtd->bitflip_threshold, corrected);
+ }
+
+ return 0;
+}
+
+static int brcmnand_read_page(struct mtd_info *mtd, struct nand_chip *chip,
+ uint8_t *buf, int oob_required, int page)
+{
+ struct brcmnand_host *host = chip->priv;
+ u8 *oob = oob_required ? (u8 *)chip->oob_poi : NULL;
+
+ return brcmnand_read(mtd, chip, host->last_addr,
+ mtd->writesize >> FC_SHIFT, (u32 *)buf, oob);
+}
+
+static int brcmnand_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
+ uint8_t *buf, int oob_required, int page)
+{
+ struct brcmnand_host *host = chip->priv;
+ u8 *oob = oob_required ? (u8 *)chip->oob_poi : NULL;
+ int ret;
+
+ brcmnand_set_ecc_enabled(host, 0);
+ ret = brcmnand_read(mtd, chip, host->last_addr,
+ mtd->writesize >> FC_SHIFT, (u32 *)buf, oob);
+ brcmnand_set_ecc_enabled(host, 1);
+ return ret;
+}
+
+static int brcmnand_read_oob(struct mtd_info *mtd, struct nand_chip *chip,
+ int page)
+{
+ return brcmnand_read(mtd, chip, (u64)page << chip->page_shift,
+ mtd->writesize >> FC_SHIFT,
+ NULL, (u8 *)chip->oob_poi);
+}
+
+static int brcmnand_read_oob_raw(struct mtd_info *mtd, struct nand_chip *chip,
+ int page)
+{
+ struct brcmnand_host *host = chip->priv;
+
+ brcmnand_set_ecc_enabled(host, 0);
+ brcmnand_read(mtd, chip, (u64)page << chip->page_shift,
+ mtd->writesize >> FC_SHIFT,
+ NULL, (u8 *)chip->oob_poi);
+ brcmnand_set_ecc_enabled(host, 1);
+ return 0;
+}
+
+static int brcmnand_read_subpage(struct mtd_info *mtd, struct nand_chip *chip,
+ uint32_t data_offs, uint32_t readlen,
+ uint8_t *bufpoi, int page)
+{
+ struct brcmnand_host *host = chip->priv;
+
+ return brcmnand_read(mtd, chip, host->last_addr + data_offs,
+ readlen >> FC_SHIFT, (u32 *)bufpoi, NULL);
+}
+
+static int brcmnand_write(struct mtd_info *mtd, struct nand_chip *chip,
+ u64 addr, const u32 *buf, u8 *oob)
+{
+ struct brcmnand_host *host = chip->priv;
+ struct brcmnand_controller *ctrl = host->ctrl;
+ unsigned int i, j, trans = mtd->writesize >> FC_SHIFT;
+ int status, ret = 0;
+
+ dev_dbg(ctrl->dev, "write %llx <- %p\n", (unsigned long long)addr, buf);
+
+ if (unlikely((u32)buf & 0x03)) {
+ dev_warn(ctrl->dev, "unaligned buffer: %p\n", buf);
+ buf = (u32 *)((u32)buf & ~0x03);
+ }
+
+ brcmnand_wp(mtd, 0);
+
+ for (i = 0; i < ctrl->max_oob; i += 4)
+ oob_reg_write(ctrl, i, 0xffffffff);
+
+ if (has_flash_dma(ctrl) && !oob && flash_dma_buf_ok(buf)) {
+ if (brcmnand_dma_trans(host, addr, (u32 *)buf,
+ mtd->writesize, CMD_PROGRAM_PAGE))
+ ret = -EIO;
+ goto out;
+ }
+
+ brcmnand_write_reg(ctrl, BRCMNAND_CMD_EXT_ADDRESS,
+ (host->cs << 16) | ((addr >> 32) & 0xffff));
+ (void)brcmnand_read_reg(ctrl, BRCMNAND_CMD_EXT_ADDRESS);
+
+ for (i = 0; i < trans; i++, addr += FC_BYTES) {
+ /* full address MUST be set before populating FC */
+ brcmnand_write_reg(ctrl, BRCMNAND_CMD_ADDRESS,
+ lower_32_bits(addr));
+ (void)brcmnand_read_reg(ctrl, BRCMNAND_CMD_ADDRESS);
+
+ if (buf) {
+ brcmnand_soc_data_bus_prepare(ctrl->soc);
+
+ for (j = 0; j < FC_WORDS; j++, buf++)
+ brcmnand_write_fc(ctrl, j, *buf);
+
+ brcmnand_soc_data_bus_unprepare(ctrl->soc);
+ } else if (oob) {
+ for (j = 0; j < FC_WORDS; j++)
+ brcmnand_write_fc(ctrl, j, 0xffffffff);
+ }
+
+ if (oob) {
+ oob += write_oob_to_regs(ctrl, i, oob,
+ mtd->oobsize / trans,
+ host->hwcfg.sector_size_1k);
+ }
+
+ /* we cannot use SPARE_AREA_PROGRAM when PARTIAL_PAGE_EN=0 */
+ brcmnand_send_cmd(host, CMD_PROGRAM_PAGE);
+ status = brcmnand_waitfunc(mtd, chip);
+
+ if (status & NAND_STATUS_FAIL) {
+ dev_info(ctrl->dev, "program failed at %llx\n",
+ (unsigned long long)addr);
+ ret = -EIO;
+ goto out;
+ }
+ }
+out:
+ brcmnand_wp(mtd, 1);
+ return ret;
+}
+
+static int brcmnand_write_page(struct mtd_info *mtd, struct nand_chip *chip,
+ const uint8_t *buf, int oob_required)
+{
+ struct brcmnand_host *host = chip->priv;
+ void *oob = oob_required ? chip->oob_poi : NULL;
+
+ brcmnand_write(mtd, chip, host->last_addr, (const u32 *)buf, oob);
+ return 0;
+}
+
+static int brcmnand_write_page_raw(struct mtd_info *mtd,
+ struct nand_chip *chip, const uint8_t *buf,
+ int oob_required)
+{
+ struct brcmnand_host *host = chip->priv;
+ void *oob = oob_required ? chip->oob_poi : NULL;
+
+ brcmnand_set_ecc_enabled(host, 0);
+ brcmnand_write(mtd, chip, host->last_addr, (const u32 *)buf, oob);
+ brcmnand_set_ecc_enabled(host, 1);
+ return 0;
+}
+
+static int brcmnand_write_oob(struct mtd_info *mtd, struct nand_chip *chip,
+ int page)
+{
+ return brcmnand_write(mtd, chip, (u64)page << chip->page_shift,
+ NULL, chip->oob_poi);
+}
+
+static int brcmnand_write_oob_raw(struct mtd_info *mtd, struct nand_chip *chip,
+ int page)
+{
+ struct brcmnand_host *host = chip->priv;
+ int ret;
+
+ brcmnand_set_ecc_enabled(host, 0);
+ ret = brcmnand_write(mtd, chip, (u64)page << chip->page_shift, NULL,
+ (u8 *)chip->oob_poi);
+ brcmnand_set_ecc_enabled(host, 1);
+
+ return ret;
+}
+
+/***********************************************************************
+ * Per-CS setup (1 NAND device)
+ ***********************************************************************/
+
+static int brcmnand_set_cfg(struct brcmnand_host *host,
+ struct brcmnand_cfg *cfg)
+{
+ struct brcmnand_controller *ctrl = host->ctrl;
+ struct nand_chip *chip = &host->chip;
+ u16 cfg_offs = brcmnand_cs_offset(ctrl, host->cs, BRCMNAND_CS_CFG);
+ u16 cfg_ext_offs = brcmnand_cs_offset(ctrl, host->cs,
+ BRCMNAND_CS_CFG_EXT);
+ u16 acc_control_offs = brcmnand_cs_offset(ctrl, host->cs,
+ BRCMNAND_CS_ACC_CONTROL);
+ u8 block_size = 0, page_size = 0, device_size = 0;
+ u32 tmp;
+
+ if (ctrl->block_sizes) {
+ int i, found;
+
+ for (i = 0, found = 0; ctrl->block_sizes[i]; i++)
+ if (ctrl->block_sizes[i] * 1024 == cfg->block_size) {
+ block_size = i;
+ found = 1;
+ }
+ if (!found) {
+ dev_warn(ctrl->dev, "invalid block size %u\n",
+ cfg->block_size);
+ return -EINVAL;
+ }
+ } else {
+ block_size = ffs(cfg->block_size) - ffs(BRCMNAND_MIN_BLOCKSIZE);
+ }
+
+ if (cfg->block_size < BRCMNAND_MIN_BLOCKSIZE || (ctrl->max_block_size &&
+ cfg->block_size > ctrl->max_block_size)) {
+ dev_warn(ctrl->dev, "invalid block size %u\n",
+ cfg->block_size);
+ block_size = 0;
+ }
+
+ if (ctrl->page_sizes) {
+ int i, found;
+
+ for (i = 0, found = 0; ctrl->page_sizes[i]; i++)
+ if (ctrl->page_sizes[i] == cfg->page_size) {
+ page_size = i;
+ found = 1;
+ }
+ if (!found) {
+ dev_warn(ctrl->dev, "invalid page size %u\n",
+ cfg->page_size);
+ return -EINVAL;
+ }
+ } else {
+ page_size = ffs(cfg->page_size) - ffs(BRCMNAND_MIN_PAGESIZE);
+ }
+
+ if (cfg->page_size < BRCMNAND_MIN_PAGESIZE || (ctrl->max_page_size &&
+ cfg->page_size > ctrl->max_page_size)) {
+ dev_warn(ctrl->dev, "invalid page size %u\n", cfg->page_size);
+ return -EINVAL;
+ }
+
+ if (fls64(cfg->device_size) < fls64(BRCMNAND_MIN_DEVSIZE)) {
+ dev_warn(ctrl->dev, "invalid device size 0x%llx\n",
+ (unsigned long long)cfg->device_size);
+ return -EINVAL;
+ }
+ device_size = fls64(cfg->device_size) - fls64(BRCMNAND_MIN_DEVSIZE);
+
+ tmp = (cfg->blk_adr_bytes << 8) |
+ (cfg->col_adr_bytes << 12) |
+ (cfg->ful_adr_bytes << 16) |
+ (!!(cfg->device_width == 16) << 23) |
+ (device_size << 24);
+ if (cfg_offs == cfg_ext_offs) {
+ tmp |= (page_size << 20) | (block_size << 28);
+ nand_writereg(ctrl, cfg_offs, tmp);
+ } else {
+ nand_writereg(ctrl, cfg_offs, tmp);
+ tmp = page_size | (block_size << 4);
+ nand_writereg(ctrl, cfg_ext_offs, tmp);
+ }
+
+ tmp = nand_readreg(ctrl, acc_control_offs);
+ tmp &= ~brcmnand_ecc_level_mask(ctrl);
+ tmp |= cfg->ecc_level << NAND_ACC_CONTROL_ECC_SHIFT;
+ tmp &= ~brcmnand_spare_area_mask(ctrl);
+ tmp |= cfg->spare_area_size;
+ nand_writereg(ctrl, acc_control_offs, tmp);
+
+ brcmnand_set_sector_size_1k(host, cfg->sector_size_1k);
+
+ /* threshold = ceil(BCH-level * 0.75) */
+ brcmnand_wr_corr_thresh(host, DIV_ROUND_UP(chip->ecc.strength * 3, 4));
+
+ return 0;
+}
+
+static void brcmnand_print_cfg(char *buf, struct brcmnand_cfg *cfg)
+{
+ buf += sprintf(buf,
+ "%lluMiB total, %uKiB blocks, %u%s pages, %uB OOB, %u-bit",
+ (unsigned long long)cfg->device_size >> 20,
+ cfg->block_size >> 10,
+ cfg->page_size >= 1024 ? cfg->page_size >> 10 : cfg->page_size,
+ cfg->page_size >= 1024 ? "KiB" : "B",
+ cfg->spare_area_size, cfg->device_width);
+
+ /* Account for Hamming ECC and for BCH 512B vs 1KiB sectors */
+ if (is_hamming_ecc(cfg))
+ sprintf(buf, ", Hamming ECC");
+ else if (cfg->sector_size_1k)
+ sprintf(buf, ", BCH-%u (1KiB sector)", cfg->ecc_level << 1);
+ else
+ sprintf(buf, ", BCH-%u", cfg->ecc_level);
+}
+
+/*
+ * Minimum number of bytes to address a page. Calculated as:
+ * roundup(log2(size / page-size) / 8)
+ *
+ * NB: the following does not "round up" for non-power-of-2 'size'; but this is
+ * OK because many other things will break if 'size' is irregular...
+ */
+static inline int get_blk_adr_bytes(u64 size, u32 writesize)
+{
+ return ALIGN(ilog2(size) - ilog2(writesize), 8) >> 3;
+}
+
+static int brcmnand_setup_dev(struct brcmnand_host *host)
+{
+ struct mtd_info *mtd = &host->mtd;
+ struct nand_chip *chip = &host->chip;
+ struct brcmnand_controller *ctrl = host->ctrl;
+ struct brcmnand_cfg *cfg = &host->hwcfg;
+ char msg[128];
+ u32 offs, tmp, oob_sector;
+ int ret;
+
+ memset(cfg, 0, sizeof(*cfg));
+
+ ret = of_property_read_u32(chip->dn, "brcm,nand-oob-sector-size",
+ &oob_sector);
+ if (ret) {
+ /* Use detected size */
+ cfg->spare_area_size = mtd->oobsize /
+ (mtd->writesize >> FC_SHIFT);
+ } else {
+ cfg->spare_area_size = oob_sector;
+ }
+ if (cfg->spare_area_size > ctrl->max_oob)
+ cfg->spare_area_size = ctrl->max_oob;
+ /*
+ * Set oobsize to be consistent with controller's spare_area_size, as
+ * the rest is inaccessible.
+ */
+ mtd->oobsize = cfg->spare_area_size * (mtd->writesize >> FC_SHIFT);
+
+ cfg->device_size = mtd->size;
+ cfg->block_size = mtd->erasesize;
+ cfg->page_size = mtd->writesize;
+ cfg->device_width = (chip->options & NAND_BUSWIDTH_16) ? 16 : 8;
+ cfg->col_adr_bytes = 2;
+ cfg->blk_adr_bytes = get_blk_adr_bytes(mtd->size, mtd->writesize);
+
+ switch (chip->ecc.size) {
+ case 512:
+ if (chip->ecc.strength == 1) /* Hamming */
+ cfg->ecc_level = 15;
+ else
+ cfg->ecc_level = chip->ecc.strength;
+ cfg->sector_size_1k = 0;
+ break;
+ case 1024:
+ if (!(ctrl->features & BRCMNAND_HAS_1K_SECTORS)) {
+ dev_err(ctrl->dev, "1KB sectors not supported\n");
+ return -EINVAL;
+ }
+ if (chip->ecc.strength & 0x1) {
+ dev_err(ctrl->dev,
+ "odd ECC not supported with 1KB sectors\n");
+ return -EINVAL;
+ }
+
+ cfg->ecc_level = chip->ecc.strength >> 1;
+ cfg->sector_size_1k = 1;
+ break;
+ default:
+ dev_err(ctrl->dev, "unsupported ECC size: %d\n",
+ chip->ecc.size);
+ return -EINVAL;
+ }
+
+ cfg->ful_adr_bytes = cfg->blk_adr_bytes;
+ if (mtd->writesize > 512)
+ cfg->ful_adr_bytes += cfg->col_adr_bytes;
+ else
+ cfg->ful_adr_bytes += 1;
+
+ ret = brcmnand_set_cfg(host, cfg);
+ if (ret)
+ return ret;
+
+ brcmnand_set_ecc_enabled(host, 1);
+
+ brcmnand_print_cfg(msg, cfg);
+ dev_info(ctrl->dev, "detected %s\n", msg);
+
+ /* Configure ACC_CONTROL */
+ offs = brcmnand_cs_offset(ctrl, host->cs, BRCMNAND_CS_ACC_CONTROL);
+ tmp = nand_readreg(ctrl, offs);
+ tmp &= ~ACC_CONTROL_PARTIAL_PAGE;
+ tmp &= ~ACC_CONTROL_RD_ERASED;
+ tmp &= ~ACC_CONTROL_FAST_PGM_RDIN;
+ if (ctrl->features & BRCMNAND_HAS_PREFETCH) {
+ /*
+ * FIXME: Flash DMA + prefetch may see spurious erased-page ECC
+ * errors
+ */
+ if (has_flash_dma(ctrl))
+ tmp &= ~ACC_CONTROL_PREFETCH;
+ else
+ tmp |= ACC_CONTROL_PREFETCH;
+ }
+ nand_writereg(ctrl, offs, tmp);
+
+ return 0;
+}
+
+static int brcmnand_init_cs(struct brcmnand_host *host)
+{
+ struct brcmnand_controller *ctrl = host->ctrl;
+ struct device_node *dn = host->of_node;
+ struct platform_device *pdev = host->pdev;
+ struct mtd_info *mtd;
+ struct nand_chip *chip;
+ int ret;
+ struct mtd_part_parser_data ppdata = { .of_node = dn };
+
+ ret = of_property_read_u32(dn, "reg", &host->cs);
+ if (ret) {
+ dev_err(&pdev->dev, "can't get chip-select\n");
+ return -ENXIO;
+ }
+
+ mtd = &host->mtd;
+ chip = &host->chip;
+
+ chip->dn = dn;
+ chip->priv = host;
+ mtd->priv = chip;
+ mtd->name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "brcmnand.%d",
+ host->cs);
+ mtd->owner = THIS_MODULE;
+ mtd->dev.parent = &pdev->dev;
+
+ chip->IO_ADDR_R = (void __iomem *)0xdeadbeef;
+ chip->IO_ADDR_W = (void __iomem *)0xdeadbeef;
+
+ chip->cmd_ctrl = brcmnand_cmd_ctrl;
+ chip->cmdfunc = brcmnand_cmdfunc;
+ chip->waitfunc = brcmnand_waitfunc;
+ chip->read_byte = brcmnand_read_byte;
+ chip->read_buf = brcmnand_read_buf;
+ chip->write_buf = brcmnand_write_buf;
+
+ chip->ecc.mode = NAND_ECC_HW;
+ chip->ecc.read_page = brcmnand_read_page;
+ chip->ecc.read_subpage = brcmnand_read_subpage;
+ chip->ecc.write_page = brcmnand_write_page;
+ chip->ecc.read_page_raw = brcmnand_read_page_raw;
+ chip->ecc.write_page_raw = brcmnand_write_page_raw;
+ chip->ecc.write_oob_raw = brcmnand_write_oob_raw;
+ chip->ecc.read_oob_raw = brcmnand_read_oob_raw;
+ chip->ecc.read_oob = brcmnand_read_oob;
+ chip->ecc.write_oob = brcmnand_write_oob;
+
+ chip->controller = &ctrl->controller;
+
+ if (nand_scan_ident(mtd, 1, NULL))
+ return -ENXIO;
+
+ chip->options |= NAND_NO_SUBPAGE_WRITE;
+ /*
+ * Avoid (for instance) kmap()'d buffers from JFFS2, which we can't DMA
+ * to/from, and have nand_base pass us a bounce buffer instead, as
+ * needed.
+ */
+ chip->options |= NAND_USE_BOUNCE_BUFFER;
+
+ if (of_get_nand_on_flash_bbt(dn))
+ chip->bbt_options |= NAND_BBT_USE_FLASH | NAND_BBT_NO_OOB;
+
+ if (brcmnand_setup_dev(host))
+ return -ENXIO;
+
+ chip->ecc.size = host->hwcfg.sector_size_1k ? 1024 : 512;
+ /* only use our internal HW threshold */
+ mtd->bitflip_threshold = 1;
+
+ chip->ecc.layout = brcmstb_choose_ecc_layout(host);
+ if (!chip->ecc.layout)
+ return -ENXIO;
+
+ if (nand_scan_tail(mtd))
+ return -ENXIO;
+
+ return mtd_device_parse_register(mtd, NULL, &ppdata, NULL, 0);
+}
+
+static void brcmnand_save_restore_cs_config(struct brcmnand_host *host,
+ int restore)
+{
+ struct brcmnand_controller *ctrl = host->ctrl;
+ u16 cfg_offs = brcmnand_cs_offset(ctrl, host->cs, BRCMNAND_CS_CFG);
+ u16 cfg_ext_offs = brcmnand_cs_offset(ctrl, host->cs,
+ BRCMNAND_CS_CFG_EXT);
+ u16 acc_control_offs = brcmnand_cs_offset(ctrl, host->cs,
+ BRCMNAND_CS_ACC_CONTROL);
+ u16 t1_offs = brcmnand_cs_offset(ctrl, host->cs, BRCMNAND_CS_TIMING1);
+ u16 t2_offs = brcmnand_cs_offset(ctrl, host->cs, BRCMNAND_CS_TIMING2);
+
+ if (restore) {
+ nand_writereg(ctrl, cfg_offs, host->hwcfg.config);
+ if (cfg_offs != cfg_ext_offs)
+ nand_writereg(ctrl, cfg_ext_offs,
+ host->hwcfg.config_ext);
+ nand_writereg(ctrl, acc_control_offs, host->hwcfg.acc_control);
+ nand_writereg(ctrl, t1_offs, host->hwcfg.timing_1);
+ nand_writereg(ctrl, t2_offs, host->hwcfg.timing_2);
+ } else {
+ host->hwcfg.config = nand_readreg(ctrl, cfg_offs);
+ if (cfg_offs != cfg_ext_offs)
+ host->hwcfg.config_ext =
+ nand_readreg(ctrl, cfg_ext_offs);
+ host->hwcfg.acc_control = nand_readreg(ctrl, acc_control_offs);
+ host->hwcfg.timing_1 = nand_readreg(ctrl, t1_offs);
+ host->hwcfg.timing_2 = nand_readreg(ctrl, t2_offs);
+ }
+}
+
+static int brcmnand_suspend(struct device *dev)
+{
+ struct brcmnand_controller *ctrl = dev_get_drvdata(dev);
+ struct brcmnand_host *host;
+
+ list_for_each_entry(host, &ctrl->host_list, node)
+ brcmnand_save_restore_cs_config(host, 0);
+
+ ctrl->nand_cs_nand_select = brcmnand_read_reg(ctrl, BRCMNAND_CS_SELECT);
+ ctrl->nand_cs_nand_xor = brcmnand_read_reg(ctrl, BRCMNAND_CS_XOR);
+ ctrl->corr_stat_threshold =
+ brcmnand_read_reg(ctrl, BRCMNAND_CORR_THRESHOLD);
+
+ if (has_flash_dma(ctrl))
+ ctrl->flash_dma_mode = flash_dma_readl(ctrl, FLASH_DMA_MODE);
+
+ return 0;
+}
+
+static int brcmnand_resume(struct device *dev)
+{
+ struct brcmnand_controller *ctrl = dev_get_drvdata(dev);
+ struct brcmnand_host *host;
+
+ if (has_flash_dma(ctrl)) {
+ flash_dma_writel(ctrl, FLASH_DMA_MODE, ctrl->flash_dma_mode);
+ flash_dma_writel(ctrl, FLASH_DMA_ERROR_STATUS, 0);
+ }
+
+ brcmnand_write_reg(ctrl, BRCMNAND_CS_SELECT, ctrl->nand_cs_nand_select);
+ brcmnand_write_reg(ctrl, BRCMNAND_CS_XOR, ctrl->nand_cs_nand_xor);
+ brcmnand_write_reg(ctrl, BRCMNAND_CORR_THRESHOLD,
+ ctrl->corr_stat_threshold);
+ if (ctrl->soc) {
+ /* Clear/re-enable interrupt */
+ ctrl->soc->ctlrdy_ack(ctrl->soc);
+ ctrl->soc->ctlrdy_set_enabled(ctrl->soc, true);
+ }
+
+ list_for_each_entry(host, &ctrl->host_list, node) {
+ struct mtd_info *mtd = &host->mtd;
+ struct nand_chip *chip = mtd->priv;
+
+ brcmnand_save_restore_cs_config(host, 1);
+
+ /* Reset the chip, required by some chips after power-up */
+ chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
+ }
+
+ return 0;
+}
+
+const struct dev_pm_ops brcmnand_pm_ops = {
+ .suspend = brcmnand_suspend,
+ .resume = brcmnand_resume,
+};
+EXPORT_SYMBOL_GPL(brcmnand_pm_ops);
+
+static const struct of_device_id brcmnand_of_match[] = {
+ { .compatible = "brcm,brcmnand-v4.0" },
+ { .compatible = "brcm,brcmnand-v5.0" },
+ { .compatible = "brcm,brcmnand-v6.0" },
+ { .compatible = "brcm,brcmnand-v6.1" },
+ { .compatible = "brcm,brcmnand-v7.0" },
+ { .compatible = "brcm,brcmnand-v7.1" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, brcmnand_of_match);
+
+/***********************************************************************
+ * Platform driver setup (per controller)
+ ***********************************************************************/
+
+int brcmnand_probe(struct platform_device *pdev, struct brcmnand_soc *soc)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *dn = dev->of_node, *child;
+ struct brcmnand_controller *ctrl;
+ struct resource *res;
+ int ret;
+
+ /* We only support device-tree instantiation */
+ if (!dn)
+ return -ENODEV;
+
+ if (!of_match_node(brcmnand_of_match, dn))
+ return -ENODEV;
+
+ ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL);
+ if (!ctrl)
+ return -ENOMEM;
+
+ dev_set_drvdata(dev, ctrl);
+ ctrl->dev = dev;
+
+ init_completion(&ctrl->done);
+ init_completion(&ctrl->dma_done);
+ spin_lock_init(&ctrl->controller.lock);
+ init_waitqueue_head(&ctrl->controller.wq);
+ INIT_LIST_HEAD(&ctrl->host_list);
+
+ /* NAND register range */
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ ctrl->nand_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(ctrl->nand_base))
+ return PTR_ERR(ctrl->nand_base);
+
+ /* Initialize NAND revision */
+ ret = brcmnand_revision_init(ctrl);
+ if (ret)
+ return ret;
+
+ /*
+ * Most chips have this cache at a fixed offset within 'nand' block.
+ * Some must specify this region separately.
+ */
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nand-cache");
+ if (res) {
+ ctrl->nand_fc = devm_ioremap_resource(dev, res);
+ if (IS_ERR(ctrl->nand_fc))
+ return PTR_ERR(ctrl->nand_fc);
+ } else {
+ ctrl->nand_fc = ctrl->nand_base +
+ ctrl->reg_offsets[BRCMNAND_FC_BASE];
+ }
+
+ /* FLASH_DMA */
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "flash-dma");
+ if (res) {
+ ctrl->flash_dma_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(ctrl->flash_dma_base))
+ return PTR_ERR(ctrl->flash_dma_base);
+
+ flash_dma_writel(ctrl, FLASH_DMA_MODE, 1); /* linked-list */
+ flash_dma_writel(ctrl, FLASH_DMA_ERROR_STATUS, 0);
+
+ /* Allocate descriptor(s) */
+ ctrl->dma_desc = dmam_alloc_coherent(dev,
+ sizeof(*ctrl->dma_desc),
+ &ctrl->dma_pa, GFP_KERNEL);
+ if (!ctrl->dma_desc)
+ return -ENOMEM;
+
+ ctrl->dma_irq = platform_get_irq(pdev, 1);
+ if ((int)ctrl->dma_irq < 0) {
+ dev_err(dev, "missing FLASH_DMA IRQ\n");
+ return -ENODEV;
+ }
+
+ ret = devm_request_irq(dev, ctrl->dma_irq,
+ brcmnand_dma_irq, 0, DRV_NAME,
+ ctrl);
+ if (ret < 0) {
+ dev_err(dev, "can't allocate IRQ %d: error %d\n",
+ ctrl->dma_irq, ret);
+ return ret;
+ }
+
+ dev_info(dev, "enabling FLASH_DMA\n");
+ }
+
+ /* Disable automatic device ID config, direct addressing */
+ brcmnand_rmw_reg(ctrl, BRCMNAND_CS_SELECT,
+ CS_SELECT_AUTO_DEVICE_ID_CFG | 0xff, 0, 0);
+ /* Disable XOR addressing */
+ brcmnand_rmw_reg(ctrl, BRCMNAND_CS_XOR, 0xff, 0, 0);
+
+ if (ctrl->features & BRCMNAND_HAS_WP) {
+ /* Permanently disable write protection */
+ if (wp_on == 2)
+ brcmnand_set_wp(ctrl, false);
+ } else {
+ wp_on = 0;
+ }
+
+ /* IRQ */
+ ctrl->irq = platform_get_irq(pdev, 0);
+ if ((int)ctrl->irq < 0) {
+ dev_err(dev, "no IRQ defined\n");
+ return -ENODEV;
+ }
+
+ /*
+ * Some SoCs integrate this controller (e.g., its interrupt bits) in
+ * interesting ways
+ */
+ if (soc) {
+ ctrl->soc = soc;
+
+ ret = devm_request_irq(dev, ctrl->irq, brcmnand_irq, 0,
+ DRV_NAME, ctrl);
+
+ /* Enable interrupt */
+ ctrl->soc->ctlrdy_ack(ctrl->soc);
+ ctrl->soc->ctlrdy_set_enabled(ctrl->soc, true);
+ } else {
+ /* Use standard interrupt infrastructure */
+ ret = devm_request_irq(dev, ctrl->irq, brcmnand_ctlrdy_irq, 0,
+ DRV_NAME, ctrl);
+ }
+ if (ret < 0) {
+ dev_err(dev, "can't allocate IRQ %d: error %d\n",
+ ctrl->irq, ret);
+ return ret;
+ }
+
+ for_each_available_child_of_node(dn, child) {
+ if (of_device_is_compatible(child, "brcm,nandcs")) {
+ struct brcmnand_host *host;
+
+ host = devm_kzalloc(dev, sizeof(*host), GFP_KERNEL);
+ if (!host)
+ return -ENOMEM;
+ host->pdev = pdev;
+ host->ctrl = ctrl;
+ host->of_node = child;
+
+ ret = brcmnand_init_cs(host);
+ if (ret)
+ continue; /* Try all chip-selects */
+
+ list_add_tail(&host->node, &ctrl->host_list);
+ }
+ }
+
+ /* No chip-selects could initialize properly */
+ if (list_empty(&ctrl->host_list))
+ return -ENODEV;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(brcmnand_probe);
+
+int brcmnand_remove(struct platform_device *pdev)
+{
+ struct brcmnand_controller *ctrl = dev_get_drvdata(&pdev->dev);
+ struct brcmnand_host *host;
+
+ list_for_each_entry(host, &ctrl->host_list, node)
+ nand_release(&host->mtd);
+
+ dev_set_drvdata(&pdev->dev, NULL);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(brcmnand_remove);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Kevin Cernekee");
+MODULE_AUTHOR("Brian Norris");
+MODULE_DESCRIPTION("NAND driver for Broadcom chips");
+MODULE_ALIAS("platform:brcmnand");
diff --git a/drivers/mtd/nand/brcmnand/brcmnand.h b/drivers/mtd/nand/brcmnand/brcmnand.h
new file mode 100644
index 0000000000000000000000000000000000000000..a20c73630b7be1005d0ed0d7caa916949537b0d8
--- /dev/null
+++ b/drivers/mtd/nand/brcmnand/brcmnand.h
@@ -0,0 +1,73 @@
+/*
+ * Copyright © 2015 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __BRCMNAND_H__
+#define __BRCMNAND_H__
+
+#include <linux/types.h>
+#include <linux/io.h>
+
+struct platform_device;
+struct dev_pm_ops;
+
+struct brcmnand_soc {
+ struct platform_device *pdev;
+ void *priv;
+ bool (*ctlrdy_ack)(struct brcmnand_soc *soc);
+ void (*ctlrdy_set_enabled)(struct brcmnand_soc *soc, bool en);
+ void (*prepare_data_bus)(struct brcmnand_soc *soc, bool prepare);
+};
+
+static inline void brcmnand_soc_data_bus_prepare(struct brcmnand_soc *soc)
+{
+ if (soc && soc->prepare_data_bus)
+ soc->prepare_data_bus(soc, true);
+}
+
+static inline void brcmnand_soc_data_bus_unprepare(struct brcmnand_soc *soc)
+{
+ if (soc && soc->prepare_data_bus)
+ soc->prepare_data_bus(soc, false);
+}
+
+static inline u32 brcmnand_readl(void __iomem *addr)
+{
+ /*
+ * MIPS endianness is configured by boot strap, which also reverses all
+ * bus endianness (i.e., big-endian CPU + big endian bus ==> native
+ * endian I/O).
+ *
+ * Other architectures (e.g., ARM) either do not support big endian, or
+ * else leave I/O in little endian mode.
+ */
+ if (IS_ENABLED(CONFIG_MIPS) && IS_ENABLED(__BIG_ENDIAN))
+ return __raw_readl(addr);
+ else
+ return readl_relaxed(addr);
+}
+
+static inline void brcmnand_writel(u32 val, void __iomem *addr)
+{
+ /* See brcmnand_readl() comments */
+ if (IS_ENABLED(CONFIG_MIPS) && IS_ENABLED(__BIG_ENDIAN))
+ __raw_writel(val, addr);
+ else
+ writel_relaxed(val, addr);
+}
+
+int brcmnand_probe(struct platform_device *pdev, struct brcmnand_soc *soc);
+int brcmnand_remove(struct platform_device *pdev);
+
+extern const struct dev_pm_ops brcmnand_pm_ops;
+
+#endif /* __BRCMNAND_H__ */
diff --git a/drivers/mtd/nand/brcmnand/brcmstb_nand.c b/drivers/mtd/nand/brcmnand/brcmstb_nand.c
new file mode 100644
index 0000000000000000000000000000000000000000..5c271077ac87623eaf575f104bbb33f9d89eee75
--- /dev/null
+++ b/drivers/mtd/nand/brcmnand/brcmstb_nand.c
@@ -0,0 +1,44 @@
+/*
+ * Copyright © 2015 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include "brcmnand.h"
+
+static const struct of_device_id brcmstb_nand_of_match[] = {
+ { .compatible = "brcm,brcmnand" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, brcmstb_nand_of_match);
+
+static int brcmstb_nand_probe(struct platform_device *pdev)
+{
+ return brcmnand_probe(pdev, NULL);
+}
+
+static struct platform_driver brcmstb_nand_driver = {
+ .probe = brcmstb_nand_probe,
+ .remove = brcmnand_remove,
+ .driver = {
+ .name = "brcmstb_nand",
+ .pm = &brcmnand_pm_ops,
+ .of_match_table = brcmstb_nand_of_match,
+ }
+};
+module_platform_driver(brcmstb_nand_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Brian Norris");
+MODULE_DESCRIPTION("NAND driver for Broadcom STB chips");
diff --git a/drivers/mtd/nand/brcmnand/iproc_nand.c b/drivers/mtd/nand/brcmnand/iproc_nand.c
new file mode 100644
index 0000000000000000000000000000000000000000..683495c746204232ebfadc5f72ebe90c62bfd6a3
--- /dev/null
+++ b/drivers/mtd/nand/brcmnand/iproc_nand.c
@@ -0,0 +1,150 @@
+/*
+ * Copyright © 2015 Broadcom Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/device.h>
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include "brcmnand.h"
+
+struct iproc_nand_soc_priv {
+ void __iomem *idm_base;
+ void __iomem *ext_base;
+ spinlock_t idm_lock;
+};
+
+#define IPROC_NAND_CTLR_READY_OFFSET 0x10
+#define IPROC_NAND_CTLR_READY BIT(0)
+
+#define IPROC_NAND_IO_CTRL_OFFSET 0x00
+#define IPROC_NAND_APB_LE_MODE BIT(24)
+#define IPROC_NAND_INT_CTRL_READ_ENABLE BIT(6)
+
+static bool iproc_nand_intc_ack(struct brcmnand_soc *soc)
+{
+ struct iproc_nand_soc_priv *priv = soc->priv;
+ void __iomem *mmio = priv->ext_base + IPROC_NAND_CTLR_READY_OFFSET;
+ u32 val = brcmnand_readl(mmio);
+
+ if (val & IPROC_NAND_CTLR_READY) {
+ brcmnand_writel(IPROC_NAND_CTLR_READY, mmio);
+ return true;
+ }
+
+ return false;
+}
+
+static void iproc_nand_intc_set(struct brcmnand_soc *soc, bool en)
+{
+ struct iproc_nand_soc_priv *priv = soc->priv;
+ void __iomem *mmio = priv->idm_base + IPROC_NAND_IO_CTRL_OFFSET;
+ u32 val;
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->idm_lock, flags);
+
+ val = brcmnand_readl(mmio);
+
+ if (en)
+ val |= IPROC_NAND_INT_CTRL_READ_ENABLE;
+ else
+ val &= ~IPROC_NAND_INT_CTRL_READ_ENABLE;
+
+ brcmnand_writel(val, mmio);
+
+ spin_unlock_irqrestore(&priv->idm_lock, flags);
+}
+
+static void iproc_nand_apb_access(struct brcmnand_soc *soc, bool prepare)
+{
+ struct iproc_nand_soc_priv *priv = soc->priv;
+ void __iomem *mmio = priv->idm_base + IPROC_NAND_IO_CTRL_OFFSET;
+ u32 val;
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->idm_lock, flags);
+
+ val = brcmnand_readl(mmio);
+
+ if (prepare)
+ val |= IPROC_NAND_APB_LE_MODE;
+ else
+ val &= ~IPROC_NAND_APB_LE_MODE;
+
+ brcmnand_writel(val, mmio);
+
+ spin_unlock_irqrestore(&priv->idm_lock, flags);
+}
+
+static int iproc_nand_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct iproc_nand_soc_priv *priv;
+ struct brcmnand_soc *soc;
+ struct resource *res;
+
+ soc = devm_kzalloc(dev, sizeof(*soc), GFP_KERNEL);
+ if (!soc)
+ return -ENOMEM;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ spin_lock_init(&priv->idm_lock);
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "iproc-idm");
+ priv->idm_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(priv->idm_base))
+ return PTR_ERR(priv->idm_base);
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "iproc-ext");
+ priv->ext_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(priv->ext_base))
+ return PTR_ERR(priv->ext_base);
+
+ soc->pdev = pdev;
+ soc->priv = priv;
+ soc->ctlrdy_ack = iproc_nand_intc_ack;
+ soc->ctlrdy_set_enabled = iproc_nand_intc_set;
+ soc->prepare_data_bus = iproc_nand_apb_access;
+
+ return brcmnand_probe(pdev, soc);
+}
+
+static const struct of_device_id iproc_nand_of_match[] = {
+ { .compatible = "brcm,nand-iproc" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, iproc_nand_of_match);
+
+static struct platform_driver iproc_nand_driver = {
+ .probe = iproc_nand_probe,
+ .remove = brcmnand_remove,
+ .driver = {
+ .name = "iproc_nand",
+ .pm = &brcmnand_pm_ops,
+ .of_match_table = iproc_nand_of_match,
+ }
+};
+module_platform_driver(iproc_nand_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Brian Norris");
+MODULE_AUTHOR("Ray Jui");
+MODULE_DESCRIPTION("NAND driver for Broadcom IPROC-based SoCs");
diff --git a/drivers/mtd/nand/cs553x_nand.c b/drivers/mtd/nand/cs553x_nand.c
index 88109d375ae7f65546a2225e894e19ade98c41ba..aec6045058c7760d436e14ad865a64c1bcf38ec1 100644
--- a/drivers/mtd/nand/cs553x_nand.c
+++ b/drivers/mtd/nand/cs553x_nand.c
@@ -237,17 +237,23 @@ static int __init cs553x_init_one(int cs, int mmio, unsigned long adr)
/* Enable the following for a flash based bad block table */
this->bbt_options = NAND_BBT_USE_FLASH;
+ new_mtd->name = kasprintf(GFP_KERNEL, "cs553x_nand_cs%d", cs);
+ if (!new_mtd->name) {
+ err = -ENOMEM;
+ goto out_ior;
+ }
+
/* Scan to find existence of the device */
if (nand_scan(new_mtd, 1)) {
err = -ENXIO;
- goto out_ior;
+ goto out_free;
}
- new_mtd->name = kasprintf(GFP_KERNEL, "cs553x_nand_cs%d", cs);
-
cs553x_mtd[cs] = new_mtd;
goto out;
+out_free:
+ kfree(new_mtd->name);
out_ior:
iounmap(this->IO_ADDR_R);
out_mtd:
diff --git a/drivers/mtd/nand/diskonchip.c b/drivers/mtd/nand/diskonchip.c
index f68a7bccecdc65878fac3ed3056ac499099992b7..7da266a5397990281e0a35625435168b2f11a78f 100644
--- a/drivers/mtd/nand/diskonchip.c
+++ b/drivers/mtd/nand/diskonchip.c
@@ -69,6 +69,9 @@ struct doc_priv {
int mh0_page;
int mh1_page;
struct mtd_info *nextdoc;
+
+ /* Handle the last stage of initialization (BBT scan, partitioning) */
+ int (*late_init)(struct mtd_info *mtd);
};
/* This is the syndrome computed by the HW ecc generator upon reading an empty
@@ -1294,14 +1297,11 @@ static int __init nftl_scan_bbt(struct mtd_info *mtd)
this->bbt_md = NULL;
}
- /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set.
- At least as nand_bbt.c is currently written. */
- if ((ret = nand_scan_bbt(mtd, NULL)))
+ ret = this->scan_bbt(mtd);
+ if (ret)
return ret;
- mtd_device_register(mtd, NULL, 0);
- if (!no_autopart)
- mtd_device_register(mtd, parts, numparts);
- return 0;
+
+ return mtd_device_register(mtd, parts, no_autopart ? 0 : numparts);
}
static int __init inftl_scan_bbt(struct mtd_info *mtd)
@@ -1344,10 +1344,10 @@ static int __init inftl_scan_bbt(struct mtd_info *mtd)
this->bbt_md->pattern = "TBB_SYSM";
}
- /* It's safe to set bd=NULL below because NAND_BBT_CREATE is not set.
- At least as nand_bbt.c is currently written. */
- if ((ret = nand_scan_bbt(mtd, NULL)))
+ ret = this->scan_bbt(mtd);
+ if (ret)
return ret;
+
memset((char *)parts, 0, sizeof(parts));
numparts = inftl_partscan(mtd, parts);
/* At least for now, require the INFTL Media Header. We could probably
@@ -1355,10 +1355,7 @@ static int __init inftl_scan_bbt(struct mtd_info *mtd)
autopartitioning, but I want to give it more thought. */
if (!numparts)
return -EIO;
- mtd_device_register(mtd, NULL, 0);
- if (!no_autopart)
- mtd_device_register(mtd, parts, numparts);
- return 0;
+ return mtd_device_register(mtd, parts, no_autopart ? 0 : numparts);
}
static inline int __init doc2000_init(struct mtd_info *mtd)
@@ -1369,7 +1366,7 @@ static inline int __init doc2000_init(struct mtd_info *mtd)
this->read_byte = doc2000_read_byte;
this->write_buf = doc2000_writebuf;
this->read_buf = doc2000_readbuf;
- this->scan_bbt = nftl_scan_bbt;
+ doc->late_init = nftl_scan_bbt;
doc->CDSNControl = CDSN_CTRL_FLASH_IO | CDSN_CTRL_ECC_IO;
doc2000_count_chips(mtd);
@@ -1396,13 +1393,13 @@ static inline int __init doc2001_init(struct mtd_info *mtd)
can have multiple chips. */
doc2000_count_chips(mtd);
mtd->name = "DiskOnChip 2000 (INFTL Model)";
- this->scan_bbt = inftl_scan_bbt;
+ doc->late_init = inftl_scan_bbt;
return (4 * doc->chips_per_floor);
} else {
/* Bog-standard Millennium */
doc->chips_per_floor = 1;
mtd->name = "DiskOnChip Millennium";
- this->scan_bbt = nftl_scan_bbt;
+ doc->late_init = nftl_scan_bbt;
return 1;
}
}
@@ -1415,7 +1412,7 @@ static inline int __init doc2001plus_init(struct mtd_info *mtd)
this->read_byte = doc2001plus_read_byte;
this->write_buf = doc2001plus_writebuf;
this->read_buf = doc2001plus_readbuf;
- this->scan_bbt = inftl_scan_bbt;
+ doc->late_init = inftl_scan_bbt;
this->cmd_ctrl = NULL;
this->select_chip = doc2001plus_select_chip;
this->cmdfunc = doc2001plus_command;
@@ -1591,6 +1588,8 @@ static int __init doc_probe(unsigned long physadr)
nand->ecc.bytes = 6;
nand->ecc.strength = 2;
nand->bbt_options = NAND_BBT_USE_FLASH;
+ /* Skip the automatic BBT scan so we can run it manually */
+ nand->options |= NAND_SKIP_BBTSCAN;
doc->physadr = physadr;
doc->virtadr = virtadr;
@@ -1608,7 +1607,7 @@ static int __init doc_probe(unsigned long physadr)
else
numchips = doc2001_init(mtd);
- if ((ret = nand_scan(mtd, numchips))) {
+ if ((ret = nand_scan(mtd, numchips)) || (ret = doc->late_init(mtd))) {
/* DBB note: i believe nand_release is necessary here, as
buffers may have been allocated in nand_base. Check with
Thomas. FIX ME! */
diff --git a/drivers/mtd/nand/fsmc_nand.c b/drivers/mtd/nand/fsmc_nand.c
index e58af4bfa8c81d1752151adc8a8b86175351057e..793872f180657e65e7d82237853b511dd72e82b3 100644
--- a/drivers/mtd/nand/fsmc_nand.c
+++ b/drivers/mtd/nand/fsmc_nand.c
@@ -562,6 +562,7 @@ static int dma_xfer(struct fsmc_nand_data *host, void *buffer, int len,
dma_cookie_t cookie;
unsigned long flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT;
int ret;
+ unsigned long time_left;
if (direction == DMA_TO_DEVICE)
chan = host->write_dma_chan;
@@ -601,14 +602,13 @@ static int dma_xfer(struct fsmc_nand_data *host, void *buffer, int len,
dma_async_issue_pending(chan);
- ret =
+ time_left =
wait_for_completion_timeout(&host->dma_access_complete,
msecs_to_jiffies(3000));
- if (ret <= 0) {
+ if (time_left == 0) {
dmaengine_terminate_all(chan);
dev_err(host->dev, "wait_for_completion_timeout\n");
- if (!ret)
- ret = -ETIMEDOUT;
+ ret = -ETIMEDOUT;
goto unmap_dma;
}
diff --git a/drivers/mtd/nand/mpc5121_nfc.c b/drivers/mtd/nand/mpc5121_nfc.c
index 1f12e5bfbceda428ecb7650cc6bc0db1355d5124..2a49b53c8db96b03a3b56a7cd039502ebfee0c9d 100644
--- a/drivers/mtd/nand/mpc5121_nfc.c
+++ b/drivers/mtd/nand/mpc5121_nfc.c
@@ -837,7 +837,7 @@ static int mpc5121_nfc_remove(struct platform_device *op)
return 0;
}
-static struct of_device_id mpc5121_nfc_match[] = {
+static const struct of_device_id mpc5121_nfc_match[] = {
{ .compatible = "fsl,mpc5121-nfc", },
{},
};
diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 372e0e38f59b323f4388c6d96416ea5ea35f3c69..2426db88db36bf95f1f247eeae597ff69238c70d 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -189,6 +189,7 @@ struct mxc_nand_host {
int clk_act;
int irq;
int eccsize;
+ int used_oobsize;
int active_cs;
struct completion op_completion;
@@ -280,12 +281,44 @@ static void memcpy32_fromio(void *trg, const void __iomem *src, size_t size)
*t++ = __raw_readl(s++);
}
+static void memcpy16_fromio(void *trg, const void __iomem *src, size_t size)
+{
+ int i;
+ u16 *t = trg;
+ const __iomem u16 *s = src;
+
+ /* We assume that src (IO) is always 32bit aligned */
+ if (PTR_ALIGN(trg, 4) == trg && IS_ALIGNED(size, 4)) {
+ memcpy32_fromio(trg, src, size);
+ return;
+ }
+
+ for (i = 0; i < (size >> 1); i++)
+ *t++ = __raw_readw(s++);
+}
+
static inline void memcpy32_toio(void __iomem *trg, const void *src, int size)
{
/* __iowrite32_copy use 32bit size values so divide by 4 */
__iowrite32_copy(trg, src, size / 4);
}
+static void memcpy16_toio(void __iomem *trg, const void *src, int size)
+{
+ int i;
+ __iomem u16 *t = trg;
+ const u16 *s = src;
+
+ /* We assume that trg (IO) is always 32bit aligned */
+ if (PTR_ALIGN(src, 4) == src && IS_ALIGNED(size, 4)) {
+ memcpy32_toio(trg, src, size);
+ return;
+ }
+
+ for (i = 0; i < (size >> 1); i++)
+ __raw_writew(*s++, t++);
+}
+
static int check_int_v3(struct mxc_nand_host *host)
{
uint32_t tmp;
@@ -807,32 +840,48 @@ static void mxc_nand_select_chip_v2(struct mtd_info *mtd, int chip)
}
/*
- * Function to transfer data to/from spare area.
+ * The controller splits a page into data chunks of 512 bytes + partial oob.
+ * There are writesize / 512 such chunks, the size of the partial oob parts is
+ * oobsize / #chunks rounded down to a multiple of 2. The last oob chunk then
+ * contains additionally the byte lost by rounding (if any).
+ * This function handles the needed shuffling between host->data_buf (which
+ * holds a page in natural order, i.e. writesize bytes data + oobsize bytes
+ * spare) and the NFC buffer.
*/
static void copy_spare(struct mtd_info *mtd, bool bfrom)
{
struct nand_chip *this = mtd->priv;
struct mxc_nand_host *host = this->priv;
- u16 i, j;
- u16 n = mtd->writesize >> 9;
+ u16 i, oob_chunk_size;
+ u16 num_chunks = mtd->writesize / 512;
+
u8 *d = host->data_buf + mtd->writesize;
u8 __iomem *s = host->spare0;
- u16 t = host->devtype_data->spare_len;
+ u16 sparebuf_size = host->devtype_data->spare_len;
- j = (mtd->oobsize / n >> 1) << 1;
+ /* size of oob chunk for all but possibly the last one */
+ oob_chunk_size = (host->used_oobsize / num_chunks) & ~1;
if (bfrom) {
- for (i = 0; i < n - 1; i++)
- memcpy32_fromio(d + i * j, s + i * t, j);
-
- /* the last section */
- memcpy32_fromio(d + i * j, s + i * t, mtd->oobsize - i * j);
+ for (i = 0; i < num_chunks - 1; i++)
+ memcpy16_fromio(d + i * oob_chunk_size,
+ s + i * sparebuf_size,
+ oob_chunk_size);
+
+ /* the last chunk */
+ memcpy16_fromio(d + i * oob_chunk_size,
+ s + i * sparebuf_size,
+ host->used_oobsize - i * oob_chunk_size);
} else {
- for (i = 0; i < n - 1; i++)
- memcpy32_toio(&s[i * t], &d[i * j], j);
-
- /* the last section */
- memcpy32_toio(&s[i * t], &d[i * j], mtd->oobsize - i * j);
+ for (i = 0; i < num_chunks - 1; i++)
+ memcpy16_toio(&s[i * sparebuf_size],
+ &d[i * oob_chunk_size],
+ oob_chunk_size);
+
+ /* the last chunk */
+ memcpy16_toio(&s[oob_chunk_size * sparebuf_size],
+ &d[i * oob_chunk_size],
+ host->used_oobsize - i * oob_chunk_size);
}
}
@@ -911,6 +960,23 @@ static int get_eccsize(struct mtd_info *mtd)
return 8;
}
+static void ecc_8bit_layout_4k(struct nand_ecclayout *layout)
+{
+ int i, j;
+
+ layout->eccbytes = 8*18;
+ for (i = 0; i < 8; i++)
+ for (j = 0; j < 18; j++)
+ layout->eccpos[i*18 + j] = i*26 + j + 7;
+
+ layout->oobfree[0].offset = 2;
+ layout->oobfree[0].length = 4;
+ for (i = 1; i < 8; i++) {
+ layout->oobfree[i].offset = i*26;
+ layout->oobfree[i].length = 7;
+ }
+}
+
static void preset_v1(struct mtd_info *mtd)
{
struct nand_chip *nand_chip = mtd->priv;
@@ -1350,7 +1416,7 @@ static inline int is_imx53_nfc(struct mxc_nand_host *host)
return host->devtype_data == &imx53_nand_devtype_data;
}
-static struct platform_device_id mxcnd_devtype[] = {
+static const struct platform_device_id mxcnd_devtype[] = {
{
.name = "imx21-nand",
.driver_data = (kernel_ulong_t) &imx21_nand_devtype_data,
@@ -1587,8 +1653,20 @@ static int mxcnd_probe(struct platform_device *pdev)
if (mtd->writesize == 2048)
this->ecc.layout = host->devtype_data->ecclayout_2k;
- else if (mtd->writesize == 4096)
+ else if (mtd->writesize == 4096) {
this->ecc.layout = host->devtype_data->ecclayout_4k;
+ if (get_eccsize(mtd) == 8)
+ ecc_8bit_layout_4k(this->ecc.layout);
+ }
+
+ /*
+ * Experimentation shows that i.MX NFC can only handle up to 218 oob
+ * bytes. Limit used_oobsize to 218 so as to not confuse copy_spare()
+ * into copying invalid data to/from the spare IO buffer, as this
+ * might cause ECC data corruption when doing sub-page write to a
+ * partially written page.
+ */
+ host->used_oobsize = min(mtd->oobsize, 218U);
if (this->ecc.mode == NAND_ECC_HW) {
if (is_imx21_nfc(host) || is_imx27_nfc(host))
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index c2e1232cd45cc847197c3960ddbd3cd38584dd55..ceb68ca8277a9ebb49c763a72b0979f089b878bb 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -1,6 +1,4 @@
/*
- * drivers/mtd/nand.c
- *
* Overview:
* This is the generic MTD driver for NAND flash devices. It should be
* capable of working with almost all NAND chips currently available.
@@ -48,6 +46,7 @@
#include <linux/leds.h>
#include <linux/io.h>
#include <linux/mtd/partitions.h>
+#include <linux/of_mtd.h>
/* Define default oob placement schemes for large and small page devices */
static struct nand_ecclayout nand_oob_8 = {
@@ -2928,9 +2927,6 @@ static int nand_onfi_get_features(struct mtd_info *mtd, struct nand_chip *chip,
& ONFI_OPT_CMD_SET_GET_FEATURES))
return -EINVAL;
- /* clear the sub feature parameters */
- memset(subfeature_param, 0, ONFI_SUBFEATURE_PARAM_LEN);
-
chip->cmdfunc(mtd, NAND_CMD_GET_FEATURES, addr, -1);
for (i = 0; i < ONFI_SUBFEATURE_PARAM_LEN; ++i)
*subfeature_param++ = chip->read_byte(mtd);
@@ -3689,7 +3685,7 @@ static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
if (find_full_id_nand(mtd, chip, type, id_data, &busw))
goto ident_done;
} else if (*dev_id == type->dev_id) {
- break;
+ break;
}
}
@@ -3798,6 +3794,39 @@ static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
return type;
}
+static int nand_dt_init(struct mtd_info *mtd, struct nand_chip *chip,
+ struct device_node *dn)
+{
+ int ecc_mode, ecc_strength, ecc_step;
+
+ if (of_get_nand_bus_width(dn) == 16)
+ chip->options |= NAND_BUSWIDTH_16;
+
+ if (of_get_nand_on_flash_bbt(dn))
+ chip->bbt_options |= NAND_BBT_USE_FLASH;
+
+ ecc_mode = of_get_nand_ecc_mode(dn);
+ ecc_strength = of_get_nand_ecc_strength(dn);
+ ecc_step = of_get_nand_ecc_step_size(dn);
+
+ if ((ecc_step >= 0 && !(ecc_strength >= 0)) ||
+ (!(ecc_step >= 0) && ecc_strength >= 0)) {
+ pr_err("must set both strength and step size in DT\n");
+ return -EINVAL;
+ }
+
+ if (ecc_mode >= 0)
+ chip->ecc.mode = ecc_mode;
+
+ if (ecc_strength >= 0)
+ chip->ecc.strength = ecc_strength;
+
+ if (ecc_step > 0)
+ chip->ecc.size = ecc_step;
+
+ return 0;
+}
+
/**
* nand_scan_ident - [NAND Interface] Scan for the NAND device
* @mtd: MTD device structure
@@ -3815,6 +3844,13 @@ int nand_scan_ident(struct mtd_info *mtd, int maxchips,
int i, nand_maf_id, nand_dev_id;
struct nand_chip *chip = mtd->priv;
struct nand_flash_dev *type;
+ int ret;
+
+ if (chip->dn) {
+ ret = nand_dt_init(mtd, chip, chip->dn);
+ if (ret)
+ return ret;
+ }
/* Set the default functions */
nand_set_defaults(chip, chip->options & NAND_BUSWIDTH_16);
diff --git a/drivers/mtd/nand/nand_bbt.c b/drivers/mtd/nand/nand_bbt.c
index 9bb8453d224ec81239a30b035d0aa59f2bc6912b..63a1a36a3f4b4b804f7c4b389eacdc8c19d30a43 100644
--- a/drivers/mtd/nand/nand_bbt.c
+++ b/drivers/mtd/nand/nand_bbt.c
@@ -1,6 +1,4 @@
/*
- * drivers/mtd/nand_bbt.c
- *
* Overview:
* Bad block table support for the NAND driver
*
@@ -64,7 +62,6 @@
#include <linux/mtd/mtd.h>
#include <linux/mtd/bbm.h>
#include <linux/mtd/nand.h>
-#include <linux/mtd/nand_ecc.h>
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/vmalloc.h>
@@ -720,7 +717,7 @@ static int write_bbt(struct mtd_info *mtd, uint8_t *buf,
/* Must we save the block contents? */
if (td->options & NAND_BBT_SAVECONTENT) {
/* Make it block aligned */
- to &= ~((loff_t)((1 << this->bbt_erase_shift) - 1));
+ to &= ~(((loff_t)1 << this->bbt_erase_shift) - 1);
len = 1 << this->bbt_erase_shift;
res = mtd_read(mtd, to, len, &retlen, buf);
if (res < 0) {
@@ -1075,10 +1072,10 @@ static void verify_bbt_descr(struct mtd_info *mtd, struct nand_bbt_descr *bd)
* The bad block table memory is allocated here. It must be freed by calling
* the nand_free_bbt function.
*/
-int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)
+static int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)
{
struct nand_chip *this = mtd->priv;
- int len, res = 0;
+ int len, res;
uint8_t *buf;
struct nand_bbt_descr *td = this->bbt_td;
struct nand_bbt_descr *md = this->bbt_md;
@@ -1099,10 +1096,9 @@ int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)
if (!td) {
if ((res = nand_memory_bbt(mtd, bd))) {
pr_err("nand_bbt: can't scan flash and build the RAM-based BBT\n");
- kfree(this->bbt);
- this->bbt = NULL;
+ goto err;
}
- return res;
+ return 0;
}
verify_bbt_descr(mtd, td);
verify_bbt_descr(mtd, md);
@@ -1112,9 +1108,8 @@ int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)
len += (len >> this->page_shift) * mtd->oobsize;
buf = vmalloc(len);
if (!buf) {
- kfree(this->bbt);
- this->bbt = NULL;
- return -ENOMEM;
+ res = -ENOMEM;
+ goto err;
}
/* Is the bbt at a given page? */
@@ -1126,6 +1121,8 @@ int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)
}
res = check_create(mtd, buf, bd);
+ if (res)
+ goto err;
/* Prevent the bbt regions from erasing / writing */
mark_bbt_region(mtd, td);
@@ -1133,6 +1130,11 @@ int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)
mark_bbt_region(mtd, md);
vfree(buf);
+ return 0;
+
+err:
+ kfree(this->bbt);
+ this->bbt = NULL;
return res;
}
diff --git a/drivers/mtd/nand/nand_ids.c b/drivers/mtd/nand/nand_ids.c
index dd620c19c6192f200ecfb1a83d77a08580e84a4b..7124400d903b3b5feb5412371c5b5dc634fbb250 100644
--- a/drivers/mtd/nand/nand_ids.c
+++ b/drivers/mtd/nand/nand_ids.c
@@ -1,6 +1,4 @@
/*
- * drivers/mtd/nandids.c
- *
* Copyright (C) 2002 Thomas Gleixner (tglx@linutronix.de)
*
* This program is free software; you can redistribute it and/or modify
diff --git a/drivers/mtd/nand/nandsim.c b/drivers/mtd/nand/nandsim.c
index f2324271b94e9d19cc39aafae95cc0ccf934fc42..52c0c1a3899cd1d09bd4d5d9685405be04deaab5 100644
--- a/drivers/mtd/nand/nandsim.c
+++ b/drivers/mtd/nand/nandsim.c
@@ -743,6 +743,11 @@ static int init_nandsim(struct mtd_info *mtd)
goto error;
}
ns->partitions[i].name = get_partition_name(i);
+ if (!ns->partitions[i].name) {
+ NS_ERR("unable to allocate memory.\n");
+ ret = -ENOMEM;
+ goto error;
+ }
ns->partitions[i].offset = next_offset;
ns->partitions[i].size = part_sz;
next_offset += ns->partitions[i].size;
@@ -756,6 +761,11 @@ static int init_nandsim(struct mtd_info *mtd)
goto error;
}
ns->partitions[i].name = get_partition_name(i);
+ if (!ns->partitions[i].name) {
+ NS_ERR("unable to allocate memory.\n");
+ ret = -ENOMEM;
+ goto error;
+ }
ns->partitions[i].offset = next_offset;
ns->partitions[i].size = remains;
ns->nbparts += 1;
diff --git a/drivers/mtd/nand/ndfc.c b/drivers/mtd/nand/ndfc.c
index 3187c6b92d9aaa7537a4a9e2b090035672591347..67a1b3f911cfec41e723a6b6212c9551447544cc 100644
--- a/drivers/mtd/nand/ndfc.c
+++ b/drivers/mtd/nand/ndfc.c
@@ -1,6 +1,4 @@
/*
- * drivers/mtd/ndfc.c
- *
* Overview:
* Platform independent driver for NDFC (NanD Flash Controller)
* integrated into EP440 cores
diff --git a/drivers/mtd/nand/plat_nand.c b/drivers/mtd/nand/plat_nand.c
index 4535c263fae576e59b87594f924c2deb5ed0f3e1..717cf623fcdef81a761940cee99ceed616501d66 100644
--- a/drivers/mtd/nand/plat_nand.c
+++ b/drivers/mtd/nand/plat_nand.c
@@ -24,8 +24,6 @@ struct plat_nand_data {
void __iomem *io_base;
};
-static const char *part_probe_types[] = { "cmdlinepart", NULL };
-
/*
* Probe for the NAND device.
*/
@@ -95,7 +93,7 @@ static int plat_nand_probe(struct platform_device *pdev)
goto out;
}
- part_types = pdata->chip.part_probe_types ? : part_probe_types;
+ part_types = pdata->chip.part_probe_types;
ppdata.of_node = pdev->dev.of_node;
err = mtd_device_parse_register(&data->mtd, part_types, &ppdata,
diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
index a4615fcc3d001f6a0efba58ddfc5b5573ad91069..1259cc558ce98954f00de813facae4bb5317ac82 100644
--- a/drivers/mtd/nand/pxa3xx_nand.c
+++ b/drivers/mtd/nand/pxa3xx_nand.c
@@ -22,13 +22,14 @@
#include <linux/mtd/nand.h>
#include <linux/mtd/partitions.h>
#include <linux/io.h>
+#include <linux/iopoll.h>
#include <linux/irq.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_mtd.h>
-#if defined(CONFIG_ARCH_PXA) || defined(CONFIG_ARCH_MMP)
+#if defined(CONFIG_ARM) && (defined(CONFIG_ARCH_PXA) || defined(CONFIG_ARCH_MMP))
#define ARCH_HAS_DMA
#endif
@@ -483,7 +484,8 @@ static void disable_int(struct pxa3xx_nand_info *info, uint32_t int_mask)
static void drain_fifo(struct pxa3xx_nand_info *info, void *data, int len)
{
if (info->ecc_bch) {
- int timeout;
+ u32 val;
+ int ret;
/*
* According to the datasheet, when reading from NDDB
@@ -494,18 +496,14 @@ static void drain_fifo(struct pxa3xx_nand_info *info, void *data, int len)
* the polling on the last read.
*/
while (len > 8) {
- __raw_readsl(info->mmio_base + NDDB, data, 8);
-
- for (timeout = 0;
- !(nand_readl(info, NDSR) & NDSR_RDDREQ);
- timeout++) {
- if (timeout >= 5) {
- dev_err(&info->pdev->dev,
- "Timeout on RDDREQ while draining the FIFO\n");
- return;
- }
-
- mdelay(1);
+ readsl(info->mmio_base + NDDB, data, 8);
+
+ ret = readl_relaxed_poll_timeout(info->mmio_base + NDSR, val,
+ val & NDSR_RDDREQ, 1000, 5000);
+ if (ret) {
+ dev_err(&info->pdev->dev,
+ "Timeout on RDDREQ while draining the FIFO\n");
+ return;
}
data += 32;
@@ -513,7 +511,7 @@ static void drain_fifo(struct pxa3xx_nand_info *info, void *data, int len)
}
}
- __raw_readsl(info->mmio_base + NDDB, data, len);
+ readsl(info->mmio_base + NDDB, data, len);
}
static void handle_data_pio(struct pxa3xx_nand_info *info)
@@ -522,14 +520,14 @@ static void handle_data_pio(struct pxa3xx_nand_info *info)
switch (info->state) {
case STATE_PIO_WRITING:
- __raw_writesl(info->mmio_base + NDDB,
- info->data_buff + info->data_buff_pos,
- DIV_ROUND_UP(do_bytes, 4));
+ writesl(info->mmio_base + NDDB,
+ info->data_buff + info->data_buff_pos,
+ DIV_ROUND_UP(do_bytes, 4));
if (info->oob_size > 0)
- __raw_writesl(info->mmio_base + NDDB,
- info->oob_buff + info->oob_buff_pos,
- DIV_ROUND_UP(info->oob_size, 4));
+ writesl(info->mmio_base + NDDB,
+ info->oob_buff + info->oob_buff_pos,
+ DIV_ROUND_UP(info->oob_size, 4));
break;
case STATE_PIO_READING:
drain_fifo(info,
@@ -1630,8 +1628,7 @@ static int alloc_nand_resource(struct platform_device *pdev)
info->pdev = pdev;
info->variant = pxa3xx_nand_get_variant(pdev);
for (cs = 0; cs < pdata->num_cs; cs++) {
- mtd = (struct mtd_info *)((unsigned int)&info[1] +
- (sizeof(*mtd) + sizeof(*host)) * cs);
+ mtd = (void *)&info[1] + (sizeof(*mtd) + sizeof(*host)) * cs;
chip = (struct nand_chip *)(&mtd[1]);
host = (struct pxa3xx_nand_host *)chip;
info->host[cs] = host;
diff --git a/drivers/mtd/nand/r852.c b/drivers/mtd/nand/r852.c
index baea83f4dea84f0f0f3d9917e1797b47cb262fca..77e96d2df96cac12194dc0679dfac1dceb098d5e 100644
--- a/drivers/mtd/nand/r852.c
+++ b/drivers/mtd/nand/r852.c
@@ -653,11 +653,15 @@ static int r852_register_nand_device(struct r852_device *dev)
if (sm_register_device(dev->mtd, dev->sm))
goto error2;
- if (device_create_file(&dev->mtd->dev, &dev_attr_media_type))
+ if (device_create_file(&dev->mtd->dev, &dev_attr_media_type)) {
message("can't create media type sysfs attribute");
+ goto error3;
+ }
dev->card_registred = 1;
return 0;
+error3:
+ nand_release(dev->mtd);
error2:
kfree(dev->mtd);
error1:
diff --git a/drivers/mtd/nand/s3c2410.c b/drivers/mtd/nand/s3c2410.c
index 0e02be47ce1d4dbc959e7037a5bb08edc8e91b98..381f67ac6b5a0626a562ffb1508b66cb263fa245 100644
--- a/drivers/mtd/nand/s3c2410.c
+++ b/drivers/mtd/nand/s3c2410.c
@@ -1105,7 +1105,7 @@ static int s3c24xx_nand_resume(struct platform_device *dev)
/* driver device registration */
-static struct platform_device_id s3c24xx_driver_ids[] = {
+static const struct platform_device_id s3c24xx_driver_ids[] = {
{
.name = "s3c2410-nand",
.driver_data = TYPE_S3C2410,
diff --git a/drivers/mtd/nand/xway_nand.c b/drivers/mtd/nand/xway_nand.c
index 3f81dc8f214cdc0240c8a7d07cee734b96d544f1..3b28db458ea042794913dffed7c160c29d24b189 100644
--- a/drivers/mtd/nand/xway_nand.c
+++ b/drivers/mtd/nand/xway_nand.c
@@ -160,14 +160,10 @@ static int xway_nand_probe(struct platform_device *pdev)
return 0;
}
-/* allow users to override the partition in DT using the cmdline */
-static const char *part_probes[] = { "cmdlinepart", "ofpart", NULL };
-
static struct platform_nand_data xway_nand_data = {
.chip = {
.nr_chips = 1,
.chip_delay = 30,
- .part_probe_types = part_probes,
},
.ctrl = {
.probe = xway_nand_probe,
diff --git a/drivers/mtd/onenand/samsung.c b/drivers/mtd/onenand/samsung.c
index 19cfb97adbc0447deae8611f03ffc565973b6076..739259513055567114aa26649f74ef6b7d7a58c9 100644
--- a/drivers/mtd/onenand/samsung.c
+++ b/drivers/mtd/onenand/samsung.c
@@ -1083,7 +1083,7 @@ static const struct dev_pm_ops s3c_pm_ops = {
.resume = s3c_pm_ops_resume,
};
-static struct platform_device_id s3c_onenand_driver_ids[] = {
+static const struct platform_device_id s3c_onenand_driver_ids[] = {
{
.name = "s3c6400-onenand",
.driver_data = TYPE_S3C6400,
diff --git a/drivers/mtd/spi-nor/fsl-quadspi.c b/drivers/mtd/spi-nor/fsl-quadspi.c
index 5d5d36272bb5b3b5d50074e89515e683cb7f6084..52a872fa1b6e412649653490bcf2a64a008feb18 100644
--- a/drivers/mtd/spi-nor/fsl-quadspi.c
+++ b/drivers/mtd/spi-nor/fsl-quadspi.c
@@ -662,7 +662,7 @@ static int fsl_qspi_nor_setup_last(struct fsl_qspi *q)
return 0;
}
-static struct of_device_id fsl_qspi_dt_ids[] = {
+static const struct of_device_id fsl_qspi_dt_ids[] = {
{ .compatible = "fsl,vf610-qspi", .data = (void *)&vybrid_data, },
{ .compatible = "fsl,imx6sx-qspi", .data = (void *)&imx6sx_data, },
{ /* sentinel */ }
diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index 14a5d2325dac0cdf0558d881a99fee2727b7a7bb..d78831b4422b4edb1d2b6f13b879ea888603f492 100644
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -513,6 +513,13 @@ static int spi_nor_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
/* NOTE: double check command sets and memory organization when you add
* more nor chips. This current list focusses on newer chips, which
* have been converging on command sets which including JEDEC ID.
+ *
+ * All newly added entries should describe *hardware* and should use SECT_4K
+ * (or SECT_4K_PMC) if hardware supports erasing 4 KiB sectors. For usage
+ * scenarios excluding small sectors there is config option that can be
+ * disabled: CONFIG_MTD_SPI_NOR_USE_4K_SECTORS.
+ * For historical (and compatibility) reasons (before we got above config) some
+ * old entries may be missing 4K flag.
*/
static const struct spi_device_id spi_nor_ids[] = {
/* Atmel -- some are (confusingly) marketed as "DataFlash" */
@@ -538,7 +545,7 @@ static const struct spi_device_id spi_nor_ids[] = {
{ "en25q64", INFO(0x1c3017, 0, 64 * 1024, 128, SECT_4K) },
{ "en25qh128", INFO(0x1c7018, 0, 64 * 1024, 256, 0) },
{ "en25qh256", INFO(0x1c7019, 0, 64 * 1024, 512, 0) },
- { "en25s64", INFO(0x1c3817, 0, 64 * 1024, 128, 0) },
+ { "en25s64", INFO(0x1c3817, 0, 64 * 1024, 128, SECT_4K) },
/* ESMT */
{ "f25l32pa", INFO(0x8c2016, 0, 64 * 1024, 64, SECT_4K) },
@@ -560,7 +567,11 @@ static const struct spi_device_id spi_nor_ids[] = {
{ "320s33b", INFO(0x898912, 0, 64 * 1024, 64, 0) },
{ "640s33b", INFO(0x898913, 0, 64 * 1024, 128, 0) },
+ /* ISSI */
+ { "is25cd512", INFO(0x7f9d20, 0, 32 * 1024, 2, SECT_4K) },
+
/* Macronix */
+ { "mx25l512e", INFO(0xc22010, 0, 64 * 1024, 1, SECT_4K) },
{ "mx25l2005a", INFO(0xc22012, 0, 64 * 1024, 4, SECT_4K) },
{ "mx25l4005a", INFO(0xc22013, 0, 64 * 1024, 8, SECT_4K) },
{ "mx25l8005", INFO(0xc22014, 0, 64 * 1024, 16, 0) },
@@ -602,7 +613,7 @@ static const struct spi_device_id spi_nor_ids[] = {
{ "s70fl01gs", INFO(0x010221, 0x4d00, 256 * 1024, 256, 0) },
{ "s25sl12800", INFO(0x012018, 0x0300, 256 * 1024, 64, 0) },
{ "s25sl12801", INFO(0x012018, 0x0301, 64 * 1024, 256, 0) },
- { "s25fl128s", INFO6(0x012018, 0x4d0180, 64 * 1024, 256, SPI_NOR_QUAD_READ) },
+ { "s25fl128s", INFO6(0x012018, 0x4d0180, 64 * 1024, 256, SECT_4K | SPI_NOR_QUAD_READ) },
{ "s25fl129p0", INFO(0x012018, 0x4d00, 256 * 1024, 64, 0) },
{ "s25fl129p1", INFO(0x012018, 0x4d01, 64 * 1024, 256, 0) },
{ "s25sl004a", INFO(0x010212, 0, 64 * 1024, 8, 0) },
@@ -613,7 +624,8 @@ static const struct spi_device_id spi_nor_ids[] = {
{ "s25fl008k", INFO(0xef4014, 0, 64 * 1024, 16, SECT_4K) },
{ "s25fl016k", INFO(0xef4015, 0, 64 * 1024, 32, SECT_4K) },
{ "s25fl064k", INFO(0xef4017, 0, 64 * 1024, 128, SECT_4K) },
- { "s25fl132k", INFO(0x014016, 0, 64 * 1024, 64, 0) },
+ { "s25fl132k", INFO(0x014016, 0, 64 * 1024, 64, SECT_4K) },
+ { "s25fl164k", INFO(0x014017, 0, 64 * 1024, 128, SECT_4K) },
/* SST -- large erase sizes are "overlays", "sectors" are 4K */
{ "sst25vf040b", INFO(0xbf258d, 0, 64 * 1024, 8, SECT_4K | SST_WRITE) },
diff --git a/fs/jffs2/fs.c b/fs/jffs2/fs.c
index 60d86e8fba6e9561bb4204ef2c99fe7c744288da..2caf1682036dc1914aaa887565b0a54edbe0ed35 100644
--- a/fs/jffs2/fs.c
+++ b/fs/jffs2/fs.c
@@ -272,12 +272,9 @@ struct inode *jffs2_iget(struct super_block *sb, unsigned long ino)
mutex_lock(&f->sem);
ret = jffs2_do_read_inode(c, f, inode->i_ino, &latest_node);
+ if (ret)
+ goto error;
- if (ret) {
- mutex_unlock(&f->sem);
- iget_failed(inode);
- return ERR_PTR(ret);
- }
inode->i_mode = jemode_to_cpu(latest_node.mode);
i_uid_write(inode, je16_to_cpu(latest_node.uid));
i_gid_write(inode, je16_to_cpu(latest_node.gid));
diff --git a/fs/jffs2/readinode.c b/fs/jffs2/readinode.c
index dddbde4f56f4e32a4c43caff1c4ab231c7106ce6..28e0aab42bc34f6a26f67b82bc3f8c94a9bf4232 100644
--- a/fs/jffs2/readinode.c
+++ b/fs/jffs2/readinode.c
@@ -1203,17 +1203,13 @@ static int jffs2_do_read_inode_internal(struct jffs2_sb_info *c,
JFFS2_ERROR("failed to read from flash: error %d, %zd of %zd bytes read\n",
ret, retlen, sizeof(*latest_node));
/* FIXME: If this fails, there seems to be a memory leak. Find it. */
- mutex_unlock(&f->sem);
- jffs2_do_clear_inode(c, f);
- return ret?ret:-EIO;
+ return ret ? ret : -EIO;
}
crc = crc32(0, latest_node, sizeof(*latest_node)-8);
if (crc != je32_to_cpu(latest_node->node_crc)) {
JFFS2_ERROR("CRC failed for read_inode of inode %u at physical location 0x%x\n",
f->inocache->ino, ref_offset(rii.latest_ref));
- mutex_unlock(&f->sem);
- jffs2_do_clear_inode(c, f);
return -EIO;
}
@@ -1250,16 +1246,11 @@ static int jffs2_do_read_inode_internal(struct jffs2_sb_info *c,
* keep in RAM to facilitate quick follow symlink
* operation. */
uint32_t csize = je32_to_cpu(latest_node->csize);
- if (csize > JFFS2_MAX_NAME_LEN) {
- mutex_unlock(&f->sem);
- jffs2_do_clear_inode(c, f);
+ if (csize > JFFS2_MAX_NAME_LEN)
return -ENAMETOOLONG;
- }
f->target = kmalloc(csize + 1, GFP_KERNEL);
if (!f->target) {
JFFS2_ERROR("can't allocate %u bytes of memory for the symlink target path cache\n", csize);
- mutex_unlock(&f->sem);
- jffs2_do_clear_inode(c, f);
return -ENOMEM;
}
@@ -1271,8 +1262,6 @@ static int jffs2_do_read_inode_internal(struct jffs2_sb_info *c,
ret = -EIO;
kfree(f->target);
f->target = NULL;
- mutex_unlock(&f->sem);
- jffs2_do_clear_inode(c, f);
return ret;
}
@@ -1289,15 +1278,11 @@ static int jffs2_do_read_inode_internal(struct jffs2_sb_info *c,
if (f->metadata) {
JFFS2_ERROR("Argh. Special inode #%u with mode 0%o had metadata node\n",
f->inocache->ino, jemode_to_cpu(latest_node->mode));
- mutex_unlock(&f->sem);
- jffs2_do_clear_inode(c, f);
return -EIO;
}
if (!frag_first(&f->fragtree)) {
JFFS2_ERROR("Argh. Special inode #%u with mode 0%o has no fragments\n",
f->inocache->ino, jemode_to_cpu(latest_node->mode));
- mutex_unlock(&f->sem);
- jffs2_do_clear_inode(c, f);
return -EIO;
}
/* ASSERT: f->fraglist != NULL */
@@ -1305,8 +1290,6 @@ static int jffs2_do_read_inode_internal(struct jffs2_sb_info *c,
JFFS2_ERROR("Argh. Special inode #%u with mode 0x%x had more than one node\n",
f->inocache->ino, jemode_to_cpu(latest_node->mode));
/* FIXME: Deal with it - check crc32, check for duplicate node, check times and discard the older one */
- mutex_unlock(&f->sem);
- jffs2_do_clear_inode(c, f);
return -EIO;
}
/* OK. We're happy */
@@ -1400,10 +1383,8 @@ int jffs2_do_crccheck_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *i
f->inocache = ic;
ret = jffs2_do_read_inode_internal(c, f, &n);
- if (!ret) {
- mutex_unlock(&f->sem);
- jffs2_do_clear_inode(c, f);
- }
+ mutex_unlock(&f->sem);
+ jffs2_do_clear_inode(c, f);
jffs2_xattr_do_crccheck_inode(c, ic);
kfree (f);
return ret;
diff --git a/include/linux/mtd/cfi.h b/include/linux/mtd/cfi.h
index 299d7d31fe539df197d571b584cca3423d6a1907..9b57a9b1b081d375b2a5bf0b8f28f4ee92305b18 100644
--- a/include/linux/mtd/cfi.h
+++ b/include/linux/mtd/cfi.h
@@ -296,183 +296,19 @@ struct cfi_private {
struct flchip chips[0]; /* per-chip data structure for each chip */
};
-/*
- * Returns the command address according to the given geometry.
- */
-static inline uint32_t cfi_build_cmd_addr(uint32_t cmd_ofs,
- struct map_info *map, struct cfi_private *cfi)
-{
- unsigned bankwidth = map_bankwidth(map);
- unsigned interleave = cfi_interleave(cfi);
- unsigned type = cfi->device_type;
- uint32_t addr;
-
- addr = (cmd_ofs * type) * interleave;
-
- /* Modify the unlock address if we are in compatibility mode.
- * For 16bit devices on 8 bit busses
- * and 32bit devices on 16 bit busses
- * set the low bit of the alternating bit sequence of the address.
- */
- if (((type * interleave) > bankwidth) && ((cmd_ofs & 0xff) == 0xaa))
- addr |= (type >> 1)*interleave;
-
- return addr;
-}
-
-/*
- * Transforms the CFI command for the given geometry (bus width & interleave).
- * It looks too long to be inline, but in the common case it should almost all
- * get optimised away.
- */
-static inline map_word cfi_build_cmd(u_long cmd, struct map_info *map, struct cfi_private *cfi)
-{
- map_word val = { {0} };
- int wordwidth, words_per_bus, chip_mode, chips_per_word;
- unsigned long onecmd;
- int i;
-
- /* We do it this way to give the compiler a fighting chance
- of optimising away all the crap for 'bankwidth' larger than
- an unsigned long, in the common case where that support is
- disabled */
- if (map_bankwidth_is_large(map)) {
- wordwidth = sizeof(unsigned long);
- words_per_bus = (map_bankwidth(map)) / wordwidth; // i.e. normally 1
- } else {
- wordwidth = map_bankwidth(map);
- words_per_bus = 1;
- }
-
- chip_mode = map_bankwidth(map) / cfi_interleave(cfi);
- chips_per_word = wordwidth * cfi_interleave(cfi) / map_bankwidth(map);
-
- /* First, determine what the bit-pattern should be for a single
- device, according to chip mode and endianness... */
- switch (chip_mode) {
- default: BUG();
- case 1:
- onecmd = cmd;
- break;
- case 2:
- onecmd = cpu_to_cfi16(map, cmd);
- break;
- case 4:
- onecmd = cpu_to_cfi32(map, cmd);
- break;
- }
-
- /* Now replicate it across the size of an unsigned long, or
- just to the bus width as appropriate */
- switch (chips_per_word) {
- default: BUG();
-#if BITS_PER_LONG >= 64
- case 8:
- onecmd |= (onecmd << (chip_mode * 32));
-#endif
- case 4:
- onecmd |= (onecmd << (chip_mode * 16));
- case 2:
- onecmd |= (onecmd << (chip_mode * 8));
- case 1:
- ;
- }
+uint32_t cfi_build_cmd_addr(uint32_t cmd_ofs,
+ struct map_info *map, struct cfi_private *cfi);
- /* And finally, for the multi-word case, replicate it
- in all words in the structure */
- for (i=0; i < words_per_bus; i++) {
- val.x[i] = onecmd;
- }
-
- return val;
-}
+map_word cfi_build_cmd(u_long cmd, struct map_info *map, struct cfi_private *cfi);
#define CMD(x) cfi_build_cmd((x), map, cfi)
-
-static inline unsigned long cfi_merge_status(map_word val, struct map_info *map,
- struct cfi_private *cfi)
-{
- int wordwidth, words_per_bus, chip_mode, chips_per_word;
- unsigned long onestat, res = 0;
- int i;
-
- /* We do it this way to give the compiler a fighting chance
- of optimising away all the crap for 'bankwidth' larger than
- an unsigned long, in the common case where that support is
- disabled */
- if (map_bankwidth_is_large(map)) {
- wordwidth = sizeof(unsigned long);
- words_per_bus = (map_bankwidth(map)) / wordwidth; // i.e. normally 1
- } else {
- wordwidth = map_bankwidth(map);
- words_per_bus = 1;
- }
-
- chip_mode = map_bankwidth(map) / cfi_interleave(cfi);
- chips_per_word = wordwidth * cfi_interleave(cfi) / map_bankwidth(map);
-
- onestat = val.x[0];
- /* Or all status words together */
- for (i=1; i < words_per_bus; i++) {
- onestat |= val.x[i];
- }
-
- res = onestat;
- switch(chips_per_word) {
- default: BUG();
-#if BITS_PER_LONG >= 64
- case 8:
- res |= (onestat >> (chip_mode * 32));
-#endif
- case 4:
- res |= (onestat >> (chip_mode * 16));
- case 2:
- res |= (onestat >> (chip_mode * 8));
- case 1:
- ;
- }
-
- /* Last, determine what the bit-pattern should be for a single
- device, according to chip mode and endianness... */
- switch (chip_mode) {
- case 1:
- break;
- case 2:
- res = cfi16_to_cpu(map, res);
- break;
- case 4:
- res = cfi32_to_cpu(map, res);
- break;
- default: BUG();
- }
- return res;
-}
-
+unsigned long cfi_merge_status(map_word val, struct map_info *map,
+ struct cfi_private *cfi);
#define MERGESTATUS(x) cfi_merge_status((x), map, cfi)
-
-/*
- * Sends a CFI command to a bank of flash for the given geometry.
- *
- * Returns the offset in flash where the command was written.
- * If prev_val is non-null, it will be set to the value at the command address,
- * before the command was written.
- */
-static inline uint32_t cfi_send_gen_cmd(u_char cmd, uint32_t cmd_addr, uint32_t base,
+uint32_t cfi_send_gen_cmd(u_char cmd, uint32_t cmd_addr, uint32_t base,
struct map_info *map, struct cfi_private *cfi,
- int type, map_word *prev_val)
-{
- map_word val;
- uint32_t addr = base + cfi_build_cmd_addr(cmd_addr, map, cfi);
- val = cfi_build_cmd(cmd, map, cfi);
-
- if (prev_val)
- *prev_val = map_read(map, addr);
-
- map_write(map, val, addr);
-
- return addr - base;
-}
+ int type, map_word *prev_val);
static inline uint8_t cfi_read_query(struct map_info *map, uint32_t addr)
{
@@ -506,15 +342,7 @@ static inline uint16_t cfi_read_query16(struct map_info *map, uint32_t addr)
}
}
-static inline void cfi_udelay(int us)
-{
- if (us >= 1000) {
- msleep((us+999)/1000);
- } else {
- udelay(us);
- cond_resched();
- }
-}
+void cfi_udelay(int us);
int __xipram cfi_qry_present(struct map_info *map, __u32 base,
struct cfi_private *cfi);
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 3d4ea7eb2b68b9681a77c161669a1944994d4431..f25e2bdd188c94643efc0f3a94c7c67de81897aa 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -26,6 +26,8 @@
struct mtd_info;
struct nand_flash_dev;
+struct device_node;
+
/* Scan and identify a NAND device */
extern int nand_scan(struct mtd_info *mtd, int max_chips);
/*
@@ -542,6 +544,7 @@ struct nand_buffers {
* flash device
* @IO_ADDR_W: [BOARDSPECIFIC] address to write the 8 I/O lines of the
* flash device.
+ * @dn: [BOARDSPECIFIC] device node describing this instance
* @read_byte: [REPLACEABLE] read one byte from the chip
* @read_word: [REPLACEABLE] read one word from the chip
* @write_byte: [REPLACEABLE] write a single byte to the chip on the
@@ -644,6 +647,8 @@ struct nand_chip {
void __iomem *IO_ADDR_R;
void __iomem *IO_ADDR_W;
+ struct device_node *dn;
+
uint8_t (*read_byte)(struct mtd_info *mtd);
u16 (*read_word)(struct mtd_info *mtd);
void (*write_byte)(struct mtd_info *mtd, uint8_t byte);
@@ -833,7 +838,6 @@ struct nand_manufacturers {
extern struct nand_flash_dev nand_flash_ids[];
extern struct nand_manufacturers nand_manuf_ids[];
-extern int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd);
extern int nand_default_bbt(struct mtd_info *mtd);
extern int nand_markbad_bbt(struct mtd_info *mtd, loff_t offs);
extern int nand_isreserved_bbt(struct mtd_info *mtd, loff_t offs);