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-rw-r--r--drivers/mtd/nand/Kconfig24
-rw-r--r--drivers/mtd/nand/Makefile1
-rw-r--r--drivers/mtd/nand/atmel_nand.c11
-rw-r--r--drivers/mtd/nand/bf5xx_nand.c17
-rw-r--r--drivers/mtd/nand/davinci_nand.c342
-rw-r--r--drivers/mtd/nand/mxc_nand.c66
-rw-r--r--drivers/mtd/nand/nand_base.c3
-rw-r--r--drivers/mtd/nand/nand_ecc.c4
-rw-r--r--drivers/mtd/nand/omap2.c776
-rw-r--r--drivers/mtd/nand/orion_nand.c23
-rw-r--r--drivers/mtd/nand/plat_nand.c19
-rw-r--r--drivers/mtd/nand/s3c2410.c268
-rw-r--r--drivers/mtd/nand/txx9ndfmc.c16
13 files changed, 1406 insertions, 164 deletions
diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
index f3276897859e..ce96c091f01b 100644
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -74,6 +74,12 @@ config MTD_NAND_AMS_DELTA
help
Support for NAND flash on Amstrad E3 (Delta).
+config MTD_NAND_OMAP2
+ tristate "NAND Flash device on OMAP2 and OMAP3"
+ depends on ARM && MTD_NAND && (ARCH_OMAP2 || ARCH_OMAP3)
+ help
+ Support for NAND flash on Texas Instruments OMAP2 and OMAP3 platforms.
+
config MTD_NAND_TS7250
tristate "NAND Flash device on TS-7250 board"
depends on MACH_TS72XX
@@ -139,27 +145,27 @@ config MTD_NAND_PPCHAMELEONEVB
This enables the NAND flash driver on the PPChameleon EVB Board.
config MTD_NAND_S3C2410
- tristate "NAND Flash support for S3C2410/S3C2440 SoC"
- depends on ARCH_S3C2410
+ tristate "NAND Flash support for Samsung S3C SoCs"
+ depends on ARCH_S3C2410 || ARCH_S3C64XX
help
- This enables the NAND flash controller on the S3C2410 and S3C2440
+ This enables the NAND flash controller on the S3C24xx and S3C64xx
SoCs
No board specific support is done by this driver, each board
must advertise a platform_device for the driver to attach.
config MTD_NAND_S3C2410_DEBUG
- bool "S3C2410 NAND driver debug"
+ bool "Samsung S3C NAND driver debug"
depends on MTD_NAND_S3C2410
help
- Enable debugging of the S3C2410 NAND driver
+ Enable debugging of the S3C NAND driver
config MTD_NAND_S3C2410_HWECC
- bool "S3C2410 NAND Hardware ECC"
+ bool "Samsung S3C NAND Hardware ECC"
depends on MTD_NAND_S3C2410
help
- Enable the use of the S3C2410's internal ECC generator when
- using NAND. Early versions of the chip have had problems with
+ Enable the use of the controller's internal ECC generator when
+ using NAND. Early versions of the chips have had problems with
incorrect ECC generation, and if using these, the default of
software ECC is preferable.
@@ -171,7 +177,7 @@ config MTD_NAND_NDFC
NDFC Nand Flash Controllers are integrated in IBM/AMCC's 4xx SoCs
config MTD_NAND_S3C2410_CLKSTOP
- bool "S3C2410 NAND IDLE clock stop"
+ bool "Samsung S3C NAND IDLE clock stop"
depends on MTD_NAND_S3C2410
default n
help
diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
index d33860ac42c3..f3a786b3cff3 100644
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -25,6 +25,7 @@ obj-$(CONFIG_MTD_NAND_CS553X) += cs553x_nand.o
obj-$(CONFIG_MTD_NAND_NDFC) += ndfc.o
obj-$(CONFIG_MTD_NAND_ATMEL) += atmel_nand.o
obj-$(CONFIG_MTD_NAND_GPIO) += gpio.o
+obj-$(CONFIG_MTD_NAND_OMAP2) += omap2.o
obj-$(CONFIG_MTD_NAND_CM_X270) += cmx270_nand.o
obj-$(CONFIG_MTD_NAND_BASLER_EXCITE) += excite_nandflash.o
obj-$(CONFIG_MTD_NAND_PXA3xx) += pxa3xx_nand.o
diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c
index 47a33cec3793..2802992b39da 100644
--- a/drivers/mtd/nand/atmel_nand.c
+++ b/drivers/mtd/nand/atmel_nand.c
@@ -24,6 +24,7 @@
#include <linux/slab.h>
#include <linux/module.h>
+#include <linux/moduleparam.h>
#include <linux/platform_device.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/nand.h>
@@ -47,6 +48,9 @@
#define no_ecc 0
#endif
+static int on_flash_bbt = 0;
+module_param(on_flash_bbt, int, 0);
+
/* Register access macros */
#define ecc_readl(add, reg) \
__raw_readl(add + ATMEL_ECC_##reg)
@@ -459,12 +463,17 @@ static int __init atmel_nand_probe(struct platform_device *pdev)
if (host->board->det_pin) {
if (gpio_get_value(host->board->det_pin)) {
- printk("No SmartMedia card inserted.\n");
+ printk(KERN_INFO "No SmartMedia card inserted.\n");
res = ENXIO;
goto err_no_card;
}
}
+ if (on_flash_bbt) {
+ printk(KERN_INFO "atmel_nand: Use On Flash BBT\n");
+ nand_chip->options |= NAND_USE_FLASH_BBT;
+ }
+
/* first scan to find the device and get the page size */
if (nand_scan_ident(mtd, 1)) {
res = -ENXIO;
diff --git a/drivers/mtd/nand/bf5xx_nand.c b/drivers/mtd/nand/bf5xx_nand.c
index 4c2a67ca801e..8506e7e606fd 100644
--- a/drivers/mtd/nand/bf5xx_nand.c
+++ b/drivers/mtd/nand/bf5xx_nand.c
@@ -458,7 +458,7 @@ static irqreturn_t bf5xx_nand_dma_irq(int irq, void *dev_id)
return IRQ_HANDLED;
}
-static int bf5xx_nand_dma_rw(struct mtd_info *mtd,
+static void bf5xx_nand_dma_rw(struct mtd_info *mtd,
uint8_t *buf, int is_read)
{
struct bf5xx_nand_info *info = mtd_to_nand_info(mtd);
@@ -496,11 +496,20 @@ static int bf5xx_nand_dma_rw(struct mtd_info *mtd,
/* setup DMA register with Blackfin DMA API */
set_dma_config(CH_NFC, 0x0);
set_dma_start_addr(CH_NFC, (unsigned long) buf);
+
+/* The DMAs have different size on BF52x and BF54x */
+#ifdef CONFIG_BF52x
+ set_dma_x_count(CH_NFC, (page_size >> 1));
+ set_dma_x_modify(CH_NFC, 2);
+ val = DI_EN | WDSIZE_16;
+#endif
+
+#ifdef CONFIG_BF54x
set_dma_x_count(CH_NFC, (page_size >> 2));
set_dma_x_modify(CH_NFC, 4);
-
- /* setup write or read operation */
val = DI_EN | WDSIZE_32;
+#endif
+ /* setup write or read operation */
if (is_read)
val |= WNR;
set_dma_config(CH_NFC, val);
@@ -512,8 +521,6 @@ static int bf5xx_nand_dma_rw(struct mtd_info *mtd,
else
bfin_write_NFC_PGCTL(0x2);
wait_for_completion(&info->dma_completion);
-
- return 0;
}
static void bf5xx_nand_dma_read_buf(struct mtd_info *mtd,
diff --git a/drivers/mtd/nand/davinci_nand.c b/drivers/mtd/nand/davinci_nand.c
index 02700f769b8a..0fad6487e6f4 100644
--- a/drivers/mtd/nand/davinci_nand.c
+++ b/drivers/mtd/nand/davinci_nand.c
@@ -44,7 +44,7 @@
* and some flavors of secondary chipselect (e.g. based on A12) as used
* with multichip packages.
*
- * The 1-bit ECC hardware is supported, but not yet the newer 4-bit ECC
+ * The 1-bit ECC hardware is supported, as well as the newer 4-bit ECC
* available on chips like the DM355 and OMAP-L137 and needed with the
* more error-prone MLC NAND chips.
*
@@ -54,11 +54,14 @@
struct davinci_nand_info {
struct mtd_info mtd;
struct nand_chip chip;
+ struct nand_ecclayout ecclayout;
struct device *dev;
struct clk *clk;
bool partitioned;
+ bool is_readmode;
+
void __iomem *base;
void __iomem *vaddr;
@@ -73,6 +76,7 @@ struct davinci_nand_info {
};
static DEFINE_SPINLOCK(davinci_nand_lock);
+static bool ecc4_busy;
#define to_davinci_nand(m) container_of(m, struct davinci_nand_info, mtd)
@@ -218,6 +222,192 @@ static int nand_davinci_correct_1bit(struct mtd_info *mtd, u_char *dat,
/*----------------------------------------------------------------------*/
/*
+ * 4-bit hardware ECC ... context maintained over entire AEMIF
+ *
+ * This is a syndrome engine, but we avoid NAND_ECC_HW_SYNDROME
+ * since that forces use of a problematic "infix OOB" layout.
+ * Among other things, it trashes manufacturer bad block markers.
+ * Also, and specific to this hardware, it ECC-protects the "prepad"
+ * in the OOB ... while having ECC protection for parts of OOB would
+ * seem useful, the current MTD stack sometimes wants to update the
+ * OOB without recomputing ECC.
+ */
+
+static void nand_davinci_hwctl_4bit(struct mtd_info *mtd, int mode)
+{
+ struct davinci_nand_info *info = to_davinci_nand(mtd);
+ unsigned long flags;
+ u32 val;
+
+ spin_lock_irqsave(&davinci_nand_lock, flags);
+
+ /* Start 4-bit ECC calculation for read/write */
+ val = davinci_nand_readl(info, NANDFCR_OFFSET);
+ val &= ~(0x03 << 4);
+ val |= (info->core_chipsel << 4) | BIT(12);
+ davinci_nand_writel(info, NANDFCR_OFFSET, val);
+
+ info->is_readmode = (mode == NAND_ECC_READ);
+
+ spin_unlock_irqrestore(&davinci_nand_lock, flags);
+}
+
+/* Read raw ECC code after writing to NAND. */
+static void
+nand_davinci_readecc_4bit(struct davinci_nand_info *info, u32 code[4])
+{
+ const u32 mask = 0x03ff03ff;
+
+ code[0] = davinci_nand_readl(info, NAND_4BIT_ECC1_OFFSET) & mask;
+ code[1] = davinci_nand_readl(info, NAND_4BIT_ECC2_OFFSET) & mask;
+ code[2] = davinci_nand_readl(info, NAND_4BIT_ECC3_OFFSET) & mask;
+ code[3] = davinci_nand_readl(info, NAND_4BIT_ECC4_OFFSET) & mask;
+}
+
+/* Terminate read ECC; or return ECC (as bytes) of data written to NAND. */
+static int nand_davinci_calculate_4bit(struct mtd_info *mtd,
+ const u_char *dat, u_char *ecc_code)
+{
+ struct davinci_nand_info *info = to_davinci_nand(mtd);
+ u32 raw_ecc[4], *p;
+ unsigned i;
+
+ /* After a read, terminate ECC calculation by a dummy read
+ * of some 4-bit ECC register. ECC covers everything that
+ * was read; correct() just uses the hardware state, so
+ * ecc_code is not needed.
+ */
+ if (info->is_readmode) {
+ davinci_nand_readl(info, NAND_4BIT_ECC1_OFFSET);
+ return 0;
+ }
+
+ /* Pack eight raw 10-bit ecc values into ten bytes, making
+ * two passes which each convert four values (in upper and
+ * lower halves of two 32-bit words) into five bytes. The
+ * ROM boot loader uses this same packing scheme.
+ */
+ nand_davinci_readecc_4bit(info, raw_ecc);
+ for (i = 0, p = raw_ecc; i < 2; i++, p += 2) {
+ *ecc_code++ = p[0] & 0xff;
+ *ecc_code++ = ((p[0] >> 8) & 0x03) | ((p[0] >> 14) & 0xfc);
+ *ecc_code++ = ((p[0] >> 22) & 0x0f) | ((p[1] << 4) & 0xf0);
+ *ecc_code++ = ((p[1] >> 4) & 0x3f) | ((p[1] >> 10) & 0xc0);
+ *ecc_code++ = (p[1] >> 18) & 0xff;
+ }
+
+ return 0;
+}
+
+/* Correct up to 4 bits in data we just read, using state left in the
+ * hardware plus the ecc_code computed when it was first written.
+ */
+static int nand_davinci_correct_4bit(struct mtd_info *mtd,
+ u_char *data, u_char *ecc_code, u_char *null)
+{
+ int i;
+ struct davinci_nand_info *info = to_davinci_nand(mtd);
+ unsigned short ecc10[8];
+ unsigned short *ecc16;
+ u32 syndrome[4];
+ unsigned num_errors, corrected;
+
+ /* All bytes 0xff? It's an erased page; ignore its ECC. */
+ for (i = 0; i < 10; i++) {
+ if (ecc_code[i] != 0xff)
+ goto compare;
+ }
+ return 0;
+
+compare:
+ /* Unpack ten bytes into eight 10 bit values. We know we're
+ * little-endian, and use type punning for less shifting/masking.
+ */
+ if (WARN_ON(0x01 & (unsigned) ecc_code))
+ return -EINVAL;
+ ecc16 = (unsigned short *)ecc_code;
+
+ ecc10[0] = (ecc16[0] >> 0) & 0x3ff;
+ ecc10[1] = ((ecc16[0] >> 10) & 0x3f) | ((ecc16[1] << 6) & 0x3c0);
+ ecc10[2] = (ecc16[1] >> 4) & 0x3ff;
+ ecc10[3] = ((ecc16[1] >> 14) & 0x3) | ((ecc16[2] << 2) & 0x3fc);
+ ecc10[4] = (ecc16[2] >> 8) | ((ecc16[3] << 8) & 0x300);
+ ecc10[5] = (ecc16[3] >> 2) & 0x3ff;
+ ecc10[6] = ((ecc16[3] >> 12) & 0xf) | ((ecc16[4] << 4) & 0x3f0);
+ ecc10[7] = (ecc16[4] >> 6) & 0x3ff;
+
+ /* Tell ECC controller about the expected ECC codes. */
+ for (i = 7; i >= 0; i--)
+ davinci_nand_writel(info, NAND_4BIT_ECC_LOAD_OFFSET, ecc10[i]);
+
+ /* Allow time for syndrome calculation ... then read it.
+ * A syndrome of all zeroes 0 means no detected errors.
+ */
+ davinci_nand_readl(info, NANDFSR_OFFSET);
+ nand_davinci_readecc_4bit(info, syndrome);
+ if (!(syndrome[0] | syndrome[1] | syndrome[2] | syndrome[3]))
+ return 0;
+
+ /* Start address calculation, and wait for it to complete.
+ * We _could_ start reading more data while this is working,
+ * to speed up the overall page read.
+ */
+ davinci_nand_writel(info, NANDFCR_OFFSET,
+ davinci_nand_readl(info, NANDFCR_OFFSET) | BIT(13));
+ for (;;) {
+ u32 fsr = davinci_nand_readl(info, NANDFSR_OFFSET);
+
+ switch ((fsr >> 8) & 0x0f) {
+ case 0: /* no error, should not happen */
+ return 0;
+ case 1: /* five or more errors detected */
+ return -EIO;
+ case 2: /* error addresses computed */
+ case 3:
+ num_errors = 1 + ((fsr >> 16) & 0x03);
+ goto correct;
+ default: /* still working on it */
+ cpu_relax();
+ continue;
+ }
+ }
+
+correct:
+ /* correct each error */
+ for (i = 0, corrected = 0; i < num_errors; i++) {
+ int error_address, error_value;
+
+ if (i > 1) {
+ error_address = davinci_nand_readl(info,
+ NAND_ERR_ADD2_OFFSET);
+ error_value = davinci_nand_readl(info,
+ NAND_ERR_ERRVAL2_OFFSET);
+ } else {
+ error_address = davinci_nand_readl(info,
+ NAND_ERR_ADD1_OFFSET);
+ error_value = davinci_nand_readl(info,
+ NAND_ERR_ERRVAL1_OFFSET);
+ }
+
+ if (i & 1) {
+ error_address >>= 16;
+ error_value >>= 16;
+ }
+ error_address &= 0x3ff;
+ error_address = (512 + 7) - error_address;
+
+ if (error_address < 512) {
+ data[error_address] ^= error_value;
+ corrected++;
+ }
+ }
+
+ return corrected;
+}
+
+/*----------------------------------------------------------------------*/
+
+/*
* NOTE: NAND boot requires ALE == EM_A[1], CLE == EM_A[2], so that's
* how these chips are normally wired. This translates to both 8 and 16
* bit busses using ALE == BIT(3) in byte addresses, and CLE == BIT(4).
@@ -294,6 +484,23 @@ static void __init nand_dm6446evm_flash_init(struct davinci_nand_info *info)
/*----------------------------------------------------------------------*/
+/* An ECC layout for using 4-bit ECC with small-page flash, storing
+ * ten ECC bytes plus the manufacturer's bad block marker byte, and
+ * and not overlapping the default BBT markers.
+ */
+static struct nand_ecclayout hwecc4_small __initconst = {
+ .eccbytes = 10,
+ .eccpos = { 0, 1, 2, 3, 4,
+ /* offset 5 holds the badblock marker */
+ 6, 7,
+ 13, 14, 15, },
+ .oobfree = {
+ {.offset = 8, .length = 5, },
+ {.offset = 16, },
+ },
+};
+
+
static int __init nand_davinci_probe(struct platform_device *pdev)
{
struct davinci_nand_pdata *pdata = pdev->dev.platform_data;
@@ -306,6 +513,10 @@ static int __init nand_davinci_probe(struct platform_device *pdev)
uint32_t val;
nand_ecc_modes_t ecc_mode;
+ /* insist on board-specific configuration */
+ if (!pdata)
+ return -ENODEV;
+
/* which external chipselect will we be managing? */
if (pdev->id < 0 || pdev->id > 3)
return -ENODEV;
@@ -351,7 +562,7 @@ static int __init nand_davinci_probe(struct platform_device *pdev)
info->chip.select_chip = nand_davinci_select_chip;
/* options such as NAND_USE_FLASH_BBT or 16-bit widths */
- info->chip.options = pdata ? pdata->options : 0;
+ info->chip.options = pdata->options;
info->ioaddr = (uint32_t __force) vaddr;
@@ -360,14 +571,8 @@ static int __init nand_davinci_probe(struct platform_device *pdev)
info->mask_chipsel = pdata->mask_chipsel;
/* use nandboot-capable ALE/CLE masks by default */
- if (pdata && pdata->mask_ale)
- info->mask_ale = pdata->mask_cle;
- else
- info->mask_ale = MASK_ALE;
- if (pdata && pdata->mask_cle)
- info->mask_cle = pdata->mask_cle;
- else
- info->mask_cle = MASK_CLE;
+ info->mask_ale = pdata->mask_cle ? : MASK_ALE;
+ info->mask_cle = pdata->mask_cle ? : MASK_CLE;
/* Set address of hardware control function */
info->chip.cmd_ctrl = nand_davinci_hwcontrol;
@@ -377,30 +582,44 @@ static int __init nand_davinci_probe(struct platform_device *pdev)
info->chip.read_buf = nand_davinci_read_buf;
info->chip.write_buf = nand_davinci_write_buf;
- /* use board-specific ECC config; else, the best available */
- if (pdata)
- ecc_mode = pdata->ecc_mode;
- else
- ecc_mode = NAND_ECC_HW;
+ /* Use board-specific ECC config */
+ ecc_mode = pdata->ecc_mode;
+ ret = -EINVAL;
switch (ecc_mode) {
case NAND_ECC_NONE:
case NAND_ECC_SOFT:
+ pdata->ecc_bits = 0;
break;
case NAND_ECC_HW:
- info->chip.ecc.calculate = nand_davinci_calculate_1bit;
- info->chip.ecc.correct = nand_davinci_correct_1bit;
- info->chip.ecc.hwctl = nand_davinci_hwctl_1bit;
+ if (pdata->ecc_bits == 4) {
+ /* No sanity checks: CPUs must support this,
+ * and the chips may not use NAND_BUSWIDTH_16.
+ */
+
+ /* No sharing 4-bit hardware between chipselects yet */
+ spin_lock_irq(&davinci_nand_lock);
+ if (ecc4_busy)
+ ret = -EBUSY;
+ else
+ ecc4_busy = true;
+ spin_unlock_irq(&davinci_nand_lock);
+
+ if (ret == -EBUSY)
+ goto err_ecc;
+
+ info->chip.ecc.calculate = nand_davinci_calculate_4bit;
+ info->chip.ecc.correct = nand_davinci_correct_4bit;
+ info->chip.ecc.hwctl = nand_davinci_hwctl_4bit;
+ info->chip.ecc.bytes = 10;
+ } else {
+ info->chip.ecc.calculate = nand_davinci_calculate_1bit;
+ info->chip.ecc.correct = nand_davinci_correct_1bit;
+ info->chip.ecc.hwctl = nand_davinci_hwctl_1bit;
+ info->chip.ecc.bytes = 3;
+ }
info->chip.ecc.size = 512;
- info->chip.ecc.bytes = 3;
break;
- case NAND_ECC_HW_SYNDROME:
- /* FIXME implement */
- info->chip.ecc.size = 512;
- info->chip.ecc.bytes = 10;
-
- dev_warn(&pdev->dev, "4-bit ECC nyet supported\n");
- /* FALL THROUGH */
default:
ret = -EINVAL;
goto err_ecc;
@@ -441,12 +660,56 @@ static int __init nand_davinci_probe(struct platform_device *pdev)
spin_unlock_irq(&davinci_nand_lock);
/* Scan to find existence of the device(s) */
- ret = nand_scan(&info->mtd, pdata->mask_chipsel ? 2 : 1);
+ ret = nand_scan_ident(&info->mtd, pdata->mask_chipsel ? 2 : 1);
if (ret < 0) {
dev_dbg(&pdev->dev, "no NAND chip(s) found\n");
goto err_scan;
}
+ /* Update ECC layout if needed ... for 1-bit HW ECC, the default
+ * is OK, but it allocates 6 bytes when only 3 are needed (for
+ * each 512 bytes). For the 4-bit HW ECC, that default is not
+ * usable: 10 bytes are needed, not 6.
+ */
+ if (pdata->ecc_bits == 4) {
+ int chunks = info->mtd.writesize / 512;
+
+ if (!chunks || info->mtd.oobsize < 16) {
+ dev_dbg(&pdev->dev, "too small\n");
+ ret = -EINVAL;
+ goto err_scan;
+ }
+
+ /* For small page chips, preserve the manufacturer's
+ * badblock marking data ... and make sure a flash BBT
+ * table marker fits in the free bytes.
+ */
+ if (chunks == 1) {
+ info->ecclayout = hwecc4_small;
+ info->ecclayout.oobfree[1].length =
+ info->mtd.oobsize - 16;
+ goto syndrome_done;
+ }
+
+ /* For large page chips we'll be wanting to use a
+ * not-yet-implemented mode that reads OOB data
+ * before reading the body of the page, to avoid
+ * the "infix OOB" model of NAND_ECC_HW_SYNDROME
+ * (and preserve manufacturer badblock markings).
+ */
+ dev_warn(&pdev->dev, "no 4-bit ECC support yet "
+ "for large page NAND\n");
+ ret = -EIO;
+ goto err_scan;
+
+syndrome_done:
+ info->chip.ecc.layout = &info->ecclayout;
+ }
+
+ ret = nand_scan_tail(&info->mtd);
+ if (ret < 0)
+ goto err_scan;
+
if (mtd_has_partitions()) {
struct mtd_partition *mtd_parts = NULL;
int mtd_parts_nb = 0;
@@ -455,22 +718,11 @@ static int __init nand_davinci_probe(struct platform_device *pdev)
static const char *probes[] __initconst =
{ "cmdlinepart", NULL };
- const char *master_name;
-
- /* Set info->mtd.name = 0 temporarily */
- master_name = info->mtd.name;
- info->mtd.name = (char *)0;
-
- /* info->mtd.name == 0, means: don't bother checking
- <mtd-id> */
mtd_parts_nb = parse_mtd_partitions(&info->mtd, probes,
&mtd_parts, 0);
-
- /* Restore info->mtd.name */
- info->mtd.name = master_name;
}
- if (mtd_parts_nb <= 0 && pdata) {
+ if (mtd_parts_nb <= 0) {
mtd_parts = pdata->parts;
mtd_parts_nb = pdata->nr_parts;
}
@@ -483,7 +735,7 @@ static int __init nand_davinci_probe(struct platform_device *pdev)
info->partitioned = true;
}
- } else if (pdata && pdata->nr_parts) {
+ } else if (pdata->nr_parts) {
dev_warn(&pdev->dev, "ignoring %d default partitions on %s\n",
pdata->nr_parts, info->mtd.name);
}
@@ -509,6 +761,11 @@ err_scan:
err_clk_enable:
clk_put(info->clk);
+ spin_lock_irq(&davinci_nand_lock);
+ if (ecc_mode == NAND_ECC_HW_SYNDROME)
+ ecc4_busy = false;
+ spin_unlock_irq(&davinci_nand_lock);
+
err_ecc:
err_clk:
err_ioremap:
@@ -532,6 +789,11 @@ static int __exit nand_davinci_remove(struct platform_device *pdev)
else
status = del_mtd_device(&info->mtd);
+ spin_lock_irq(&davinci_nand_lock);
+ if (info->chip.ecc.mode == NAND_ECC_HW_SYNDROME)
+ ecc4_busy = false;
+ spin_unlock_irq(&davinci_nand_lock);
+
iounmap(info->base);
iounmap(info->vaddr);
diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 40c26080ecda..76beea40d2cf 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -138,7 +138,14 @@ static struct nand_ecclayout nand_hw_eccoob_8 = {
static struct nand_ecclayout nand_hw_eccoob_16 = {
.eccbytes = 5,
.eccpos = {6, 7, 8, 9, 10},
- .oobfree = {{0, 6}, {12, 4}, }
+ .oobfree = {{0, 5}, {11, 5}, }
+};
+
+static struct nand_ecclayout nand_hw_eccoob_64 = {
+ .eccbytes = 20,
+ .eccpos = {6, 7, 8, 9, 10, 22, 23, 24, 25, 26,
+ 38, 39, 40, 41, 42, 54, 55, 56, 57, 58},
+ .oobfree = {{2, 4}, {11, 10}, {27, 10}, {43, 10}, {59, 5}, }
};
#ifdef CONFIG_MTD_PARTITIONS
@@ -192,7 +199,7 @@ static void wait_op_done(struct mxc_nand_host *host, int max_retries,
}
udelay(1);
}
- if (max_retries <= 0)
+ if (max_retries < 0)
DEBUG(MTD_DEBUG_LEVEL0, "%s(%d): INT not set\n",
__func__, param);
}
@@ -795,9 +802,13 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
send_addr(host, (page_addr & 0xff), false);
if (host->pagesize_2k) {
- send_addr(host, (page_addr >> 8) & 0xFF, false);
- if (mtd->size >= 0x40000000)
+ if (mtd->size >= 0x10000000) {
+ /* paddr_8 - paddr_15 */
+ send_addr(host, (page_addr >> 8) & 0xff, false);
send_addr(host, (page_addr >> 16) & 0xff, true);
+ } else
+ /* paddr_8 - paddr_15 */
+ send_addr(host, (page_addr >> 8) & 0xff, true);
} else {
/* One more address cycle for higher density devices */
if (mtd->size >= 0x4000000) {
@@ -923,7 +934,6 @@ static int __init mxcnd_probe(struct platform_device *pdev)
this->ecc.mode = NAND_ECC_HW;
this->ecc.size = 512;
this->ecc.bytes = 3;
- this->ecc.layout = &nand_hw_eccoob_8;
tmp = readw(host->regs + NFC_CONFIG1);
tmp |= NFC_ECC_EN;
writew(tmp, host->regs + NFC_CONFIG1);
@@ -957,12 +967,44 @@ static int __init mxcnd_probe(struct platform_device *pdev)
this->ecc.layout = &nand_hw_eccoob_16;
}
- host->pagesize_2k = 0;
+ /* first scan to find the device and get the page size */
+ if (nand_scan_ident(mtd, 1)) {
+ err = -ENXIO;
+ goto escan;
+ }
- /* Scan to find existence of the device */
- if (nand_scan(mtd, 1)) {
- DEBUG(MTD_DEBUG_LEVEL0,
- "MXC_ND: Unable to find any NAND device.\n");
+ host->pagesize_2k = (mtd->writesize == 2048) ? 1 : 0;
+
+ if (this->ecc.mode == NAND_ECC_HW) {
+ switch (mtd->oobsize) {
+ case 8:
+ this->ecc.layout = &nand_hw_eccoob_8;
+ break;
+ case 16:
+ this->ecc.layout = &nand_hw_eccoob_16;
+ break;
+ case 64:
+ this->ecc.layout = &nand_hw_eccoob_64;
+ break;
+ default:
+ /* page size not handled by HW ECC */
+ /* switching back to soft ECC */
+ this->ecc.size = 512;
+ this->ecc.bytes = 3;
+ this->ecc.layout = &nand_hw_eccoob_8;
+ this->ecc.mode = NAND_ECC_SOFT;
+ this->ecc.calculate = NULL;
+ this->ecc.correct = NULL;
+ this->ecc.hwctl = NULL;
+ tmp = readw(host->regs + NFC_CONFIG1);
+ tmp &= ~NFC_ECC_EN;
+ writew(tmp, host->regs + NFC_CONFIG1);
+ break;
+ }
+ }
+
+ /* second phase scan */
+ if (nand_scan_tail(mtd)) {
err = -ENXIO;
goto escan;
}
@@ -985,7 +1027,7 @@ static int __init mxcnd_probe(struct platform_device *pdev)
return 0;
escan:
- free_irq(host->irq, NULL);
+ free_irq(host->irq, host);
eirq:
iounmap(host->regs);
eres:
@@ -1005,7 +1047,7 @@ static int __devexit mxcnd_remove(struct platform_device *pdev)
platform_set_drvdata(pdev, NULL);
nand_release(&host->mtd);
- free_irq(host->irq, NULL);
+ free_irq(host->irq, host);
iounmap(host->regs);
kfree(host);
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 3d7ed432fa41..8c21b89d2d0c 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -2756,7 +2756,8 @@ int nand_scan_tail(struct mtd_info *mtd)
* the out of band area
*/
chip->ecc.layout->oobavail = 0;
- for (i = 0; chip->ecc.layout->oobfree[i].length; i++)
+ for (i = 0; chip->ecc.layout->oobfree[i].length
+ && i < ARRAY_SIZE(chip->ecc.layout->oobfree); i++)
chip->ecc.layout->oobavail +=
chip->ecc.layout->oobfree[i].length;
mtd->oobavail = chip->ecc.layout->oobavail;
diff --git a/drivers/mtd/nand/nand_ecc.c b/drivers/mtd/nand/nand_ecc.c
index 868147acce2c..c0cb87d6d16e 100644
--- a/drivers/mtd/nand/nand_ecc.c
+++ b/drivers/mtd/nand/nand_ecc.c
@@ -428,8 +428,8 @@ EXPORT_SYMBOL(nand_calculate_ecc);
int nand_correct_data(struct mtd_info *mtd, unsigned char *buf,
unsigned char *read_ecc, unsigned char *calc_ecc)
{
- unsigned char b0, b1, b2;
- unsigned char byte_addr, bit_addr;
+ unsigned char b0, b1, b2, bit_addr;
+ unsigned int byte_addr;
/* 256 or 512 bytes/ecc */
const uint32_t eccsize_mult =
(((struct nand_chip *)mtd->priv)->ecc.size) >> 8;
diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c
new file mode 100644
index 000000000000..0cd76f89f4b0
--- /dev/null
+++ b/drivers/mtd/nand/omap2.c
@@ -0,0 +1,776 @@
+/*
+ * Copyright © 2004 Texas Instruments, Jian Zhang <jzhang@ti.com>
+ * Copyright © 2004 Micron Technology Inc.
+ * Copyright © 2004 David Brownell
+ *
+ * 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.
+ */
+
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/delay.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/partitions.h>
+#include <linux/io.h>
+
+#include <asm/dma.h>
+
+#include <mach/gpmc.h>
+#include <mach/nand.h>
+
+#define GPMC_IRQ_STATUS 0x18
+#define GPMC_ECC_CONFIG 0x1F4
+#define GPMC_ECC_CONTROL 0x1F8
+#define GPMC_ECC_SIZE_CONFIG 0x1FC
+#define GPMC_ECC1_RESULT 0x200
+
+#define DRIVER_NAME "omap2-nand"
+
+/* size (4 KiB) for IO mapping */
+#define NAND_IO_SIZE SZ_4K
+
+#define NAND_WP_OFF 0
+#define NAND_WP_BIT 0x00000010
+#define WR_RD_PIN_MONITORING 0x00600000
+
+#define GPMC_BUF_FULL 0x00000001
+#define GPMC_BUF_EMPTY 0x00000000
+
+#define NAND_Ecc_P1e (1 << 0)
+#define NAND_Ecc_P2e (1 << 1)
+#define NAND_Ecc_P4e (1 << 2)
+#define NAND_Ecc_P8e (1 << 3)
+#define NAND_Ecc_P16e (1 << 4)
+#define NAND_Ecc_P32e (1 << 5)
+#define NAND_Ecc_P64e (1 << 6)
+#define NAND_Ecc_P128e (1 << 7)
+#define NAND_Ecc_P256e (1 << 8)
+#define NAND_Ecc_P512e (1 << 9)
+#define NAND_Ecc_P1024e (1 << 10)
+#define NAND_Ecc_P2048e (1 << 11)
+
+#define NAND_Ecc_P1o (1 << 16)
+#define NAND_Ecc_P2o (1 << 17)
+#define NAND_Ecc_P4o (1 << 18)
+#define NAND_Ecc_P8o (1 << 19)
+#define NAND_Ecc_P16o (1 << 20)
+#define NAND_Ecc_P32o (1 << 21)
+#define NAND_Ecc_P64o (1 << 22)
+#define NAND_Ecc_P128o (1 << 23)
+#define NAND_Ecc_P256o (1 << 24)
+#define NAND_Ecc_P512o (1 << 25)
+#define NAND_Ecc_P1024o (1 << 26)
+#define NAND_Ecc_P2048o (1 << 27)
+
+#define TF(value) (value ? 1 : 0)
+
+#define P2048e(a) (TF(a & NAND_Ecc_P2048e) << 0)
+#define P2048o(a) (TF(a & NAND_Ecc_P2048o) << 1)
+#define P1e(a) (TF(a & NAND_Ecc_P1e) << 2)
+#define P1o(a) (TF(a & NAND_Ecc_P1o) << 3)
+#define P2e(a) (TF(a & NAND_Ecc_P2e) << 4)
+#define P2o(a) (TF(a & NAND_Ecc_P2o) << 5)
+#define P4e(a) (TF(a & NAND_Ecc_P4e) << 6)
+#define P4o(a) (TF(a & NAND_Ecc_P4o) << 7)
+
+#define P8e(a) (TF(a & NAND_Ecc_P8e) << 0)
+#define P8o(a) (TF(a & NAND_Ecc_P8o) << 1)
+#define P16e(a) (TF(a & NAND_Ecc_P16e) << 2)
+#define P16o(a) (TF(a & NAND_Ecc_P16o) << 3)
+#define P32e(a) (TF(a & NAND_Ecc_P32e) << 4)
+#define P32o(a) (TF(a & NAND_Ecc_P32o) << 5)
+#define P64e(a) (TF(a & NAND_Ecc_P64e) << 6)
+#define P64o(a) (TF(a & NAND_Ecc_P64o) << 7)
+
+#define P128e(a) (TF(a & NAND_Ecc_P128e) << 0)
+#define P128o(a) (TF(a & NAND_Ecc_P128o) << 1)
+#define P256e(a) (TF(a & NAND_Ecc_P256e) << 2)
+#define P256o(a) (TF(a & NAND_Ecc_P256o) << 3)
+#define P512e(a) (TF(a & NAND_Ecc_P512e) << 4)
+#define P512o(a) (TF(a & NAND_Ecc_P512o) << 5)
+#define P1024e(a) (TF(a & NAND_Ecc_P1024e) << 6)
+#define P1024o(a) (TF(a & NAND_Ecc_P1024o) << 7)
+
+#define P8e_s(a) (TF(a & NAND_Ecc_P8e) << 0)
+#define P8o_s(a) (TF(a & NAND_Ecc_P8o) << 1)
+#define P16e_s(a) (TF(a & NAND_Ecc_P16e) << 2)
+#define P16o_s(a) (TF(a & NAND_Ecc_P16o) << 3)
+#define P1e_s(a) (TF(a & NAND_Ecc_P1e) << 4)
+#define P1o_s(a) (TF(a & NAND_Ecc_P1o) << 5)
+#define P2e_s(a) (TF(a & NAND_Ecc_P2e) << 6)
+#define P2o_s(a) (TF(a & NAND_Ecc_P2o) << 7)
+
+#define P4e_s(a) (TF(a & NAND_Ecc_P4e) << 0)
+#define P4o_s(a) (TF(a & NAND_Ecc_P4o) << 1)
+
+#ifdef CONFIG_MTD_PARTITIONS
+static const char *part_probes[] = { "cmdlinepart", NULL };
+#endif
+
+struct omap_nand_info {
+ struct nand_hw_control controller;
+ struct omap_nand_platform_data *pdata;
+ struct mtd_info mtd;
+ struct mtd_partition *parts;
+ struct nand_chip nand;
+ struct platform_device *pdev;
+
+ int gpmc_cs;
+ unsigned long phys_base;
+ void __iomem *gpmc_cs_baseaddr;
+ void __iomem *gpmc_baseaddr;
+};
+
+/**
+ * omap_nand_wp - This function enable or disable the Write Protect feature
+ * @mtd: MTD device structure
+ * @mode: WP ON/OFF
+ */
+static void omap_nand_wp(struct mtd_info *mtd, int mode)
+{
+ struct omap_nand_info *info = container_of(mtd,
+ struct omap_nand_info, mtd);
+
+ unsigned long config = __raw_readl(info->gpmc_baseaddr + GPMC_CONFIG);
+
+ if (mode)
+ config &= ~(NAND_WP_BIT); /* WP is ON */
+ else
+ config |= (NAND_WP_BIT); /* WP is OFF */
+
+ __raw_writel(config, (info->gpmc_baseaddr + GPMC_CONFIG));
+}
+
+/**
+ * omap_hwcontrol - hardware specific access to control-lines
+ * @mtd: MTD device structure
+ * @cmd: command to device
+ * @ctrl:
+ * NAND_NCE: bit 0 -> don't care
+ * NAND_CLE: bit 1 -> Command Latch
+ * NAND_ALE: bit 2 -> Address Latch
+ *
+ * NOTE: boards may use different bits for these!!
+ */
+static void omap_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
+{
+ struct omap_nand_info *info = container_of(mtd,
+ struct omap_nand_info, mtd);
+ switch (ctrl) {
+ case NAND_CTRL_CHANGE | NAND_CTRL_CLE:
+ info->nand.IO_ADDR_W = info->gpmc_cs_baseaddr +
+ GPMC_CS_NAND_COMMAND;
+ info->nand.IO_ADDR_R = info->gpmc_cs_baseaddr +
+ GPMC_CS_NAND_DATA;
+ break;
+
+ case NAND_CTRL_CHANGE | NAND_CTRL_ALE:
+ info->nand.IO_ADDR_W = info->gpmc_cs_baseaddr +
+ GPMC_CS_NAND_ADDRESS;
+ info->nand.IO_ADDR_R = info->gpmc_cs_baseaddr +
+ GPMC_CS_NAND_DATA;
+ break;
+
+ case NAND_CTRL_CHANGE | NAND_NCE:
+ info->nand.IO_ADDR_W = info->gpmc_cs_baseaddr +
+ GPMC_CS_NAND_DATA;
+ info->nand.IO_ADDR_R = info->gpmc_cs_baseaddr +
+ GPMC_CS_NAND_DATA;
+ break;
+ }
+
+ if (cmd != NAND_CMD_NONE)
+ __raw_writeb(cmd, info->nand.IO_ADDR_W);
+}
+
+/**
+ * omap_read_buf16 - read data from NAND controller into buffer
+ * @mtd: MTD device structure
+ * @buf: buffer to store date
+ * @len: number of bytes to read
+ */
+static void omap_read_buf16(struct mtd_info *mtd, u_char *buf, int len)
+{
+ struct nand_chip *nand = mtd->priv;
+
+ __raw_readsw(nand->IO_ADDR_R, buf, len / 2);
+}
+
+/**
+ * omap_write_buf16 - write buffer to NAND controller
+ * @mtd: MTD device structure
+ * @buf: data buffer
+ * @len: number of bytes to write
+ */
+static void omap_write_buf16(struct mtd_info *mtd, const u_char * buf, int len)
+{
+ struct omap_nand_info *info = container_of(mtd,
+ struct omap_nand_info, mtd);
+ u16 *p = (u16 *) buf;
+
+ /* FIXME try bursts of writesw() or DMA ... */
+ len >>= 1;
+
+ while (len--) {
+ writew(*p++, info->nand.IO_ADDR_W);
+
+ while (GPMC_BUF_EMPTY == (readl(info->gpmc_baseaddr +
+ GPMC_STATUS) & GPMC_BUF_FULL))
+ ;
+ }
+}
+/**
+ * omap_verify_buf - Verify chip data against buffer
+ * @mtd: MTD device structure
+ * @buf: buffer containing the data to compare
+ * @len: number of bytes to compare
+ */
+static int omap_verify_buf(struct mtd_info *mtd, const u_char * buf, int len)
+{
+ struct omap_nand_info *info = container_of(mtd, struct omap_nand_info,
+ mtd);
+ u16 *p = (u16 *) buf;
+
+ len >>= 1;
+ while (len--) {
+ if (*p++ != cpu_to_le16(readw(info->nand.IO_ADDR_R)))
+ return -EFAULT;
+ }
+
+ return 0;
+}
+
+#ifdef CONFIG_MTD_NAND_OMAP_HWECC
+/**
+ * omap_hwecc_init - Initialize the HW ECC for NAND flash in GPMC controller
+ * @mtd: MTD device structure
+ */
+static void omap_hwecc_init(struct mtd_info *mtd)
+{
+ struct omap_nand_info *info = container_of(mtd, struct omap_nand_info,
+ mtd);
+ struct nand_chip *chip = mtd->priv;
+ unsigned long val = 0x0;
+
+ /* Read from ECC Control Register */
+ val = __raw_readl(info->gpmc_baseaddr + GPMC_ECC_CONTROL);
+ /* Clear all ECC | Enable Reg1 */
+ val = ((0x00000001<<8) | 0x00000001);
+ __raw_writel(val, info->gpmc_baseaddr + GPMC_ECC_CONTROL);
+
+ /* Read from ECC Size Config Register */
+ val = __raw_readl(info->gpmc_baseaddr + GPMC_ECC_SIZE_CONFIG);
+ /* ECCSIZE1=512 | Select eccResultsize[0-3] */
+ val = ((((chip->ecc.size >> 1) - 1) << 22) | (0x0000000F));
+ __raw_writel(val, info->gpmc_baseaddr + GPMC_ECC_SIZE_CONFIG);
+}
+
+/**
+ * gen_true_ecc - This function will generate true ECC value
+ * @ecc_buf: buffer to store ecc code
+ *
+ * This generated true ECC value can be used when correcting
+ * data read from NAND flash memory core
+ */
+static void gen_true_ecc(u8 *ecc_buf)
+{
+ u32 tmp = ecc_buf[0] | (ecc_buf[1] << 16) |
+ ((ecc_buf[2] & 0xF0) << 20) | ((ecc_buf[2] & 0x0F) << 8);
+
+ ecc_buf[0] = ~(P64o(tmp) | P64e(tmp) | P32o(tmp) | P32e(tmp) |
+ P16o(tmp) | P16e(tmp) | P8o(tmp) | P8e(tmp));
+ ecc_buf[1] = ~(P1024o(tmp) | P1024e(tmp) | P512o(tmp) | P512e(tmp) |
+ P256o(tmp) | P256e(tmp) | P128o(tmp) | P128e(tmp));
+ ecc_buf[2] = ~(P4o(tmp) | P4e(tmp) | P2o(tmp) | P2e(tmp) | P1o(tmp) |
+ P1e(tmp) | P2048o(tmp) | P2048e(tmp));
+}
+
+/**
+ * omap_compare_ecc - Detect (2 bits) and correct (1 bit) error in data
+ * @ecc_data1: ecc code from nand spare area
+ * @ecc_data2: ecc code from hardware register obtained from hardware ecc
+ * @page_data: page data
+ *
+ * This function compares two ECC's and indicates if there is an error.
+ * If the error can be corrected it will be corrected to the buffer.
+ */
+static int omap_compare_ecc(u8 *ecc_data1, /* read from NAND memory */
+ u8 *ecc_data2, /* read from register */
+ u8 *page_data)
+{
+ uint i;
+ u8 tmp0_bit[8], tmp1_bit[8], tmp2_bit[8];
+ u8 comp0_bit[8], comp1_bit[8], comp2_bit[8];
+ u8 ecc_bit[24];
+ u8 ecc_sum = 0;
+ u8 find_bit = 0;
+ uint find_byte = 0;
+ int isEccFF;
+
+ isEccFF = ((*(u32 *)ecc_data1 & 0xFFFFFF) == 0xFFFFFF);
+
+ gen_true_ecc(ecc_data1);
+ gen_true_ecc(ecc_data2);
+
+ for (i = 0; i <= 2; i++) {
+ *(ecc_data1 + i) = ~(*(ecc_data1 + i));
+ *(ecc_data2 + i) = ~(*(ecc_data2 + i));
+ }
+
+ for (i = 0; i < 8; i++) {
+ tmp0_bit[i] = *ecc_data1 % 2;
+ *ecc_data1 = *ecc_data1 / 2;
+ }
+
+ for (i = 0; i < 8; i++) {
+ tmp1_bit[i] = *(ecc_data1 + 1) % 2;
+ *(ecc_data1 + 1) = *(ecc_data1 + 1) / 2;
+ }
+
+ for (i = 0; i < 8; i++) {
+ tmp2_bit[i] = *(ecc_data1 + 2) % 2;
+ *(ecc_data1 + 2) = *(ecc_data1 + 2) / 2;
+ }
+
+ for (i = 0; i < 8; i++) {
+ comp0_bit[i] = *ecc_data2 % 2;
+ *ecc_data2 = *ecc_data2 / 2;
+ }
+
+ for (i = 0; i < 8; i++) {
+ comp1_bit[i] = *(ecc_data2 + 1) % 2;
+ *(ecc_data2 + 1) = *(ecc_data2 + 1) / 2;
+ }
+
+ for (i = 0; i < 8; i++) {
+ comp2_bit[i] = *(ecc_data2 + 2) % 2;
+ *(ecc_data2 + 2) = *(ecc_data2 + 2) / 2;
+ }
+
+ for (i = 0; i < 6; i++)
+ ecc_bit[i] = tmp2_bit[i + 2] ^ comp2_bit[i + 2];
+
+ for (i = 0; i < 8; i++)
+ ecc_bit[i + 6] = tmp0_bit[i] ^ comp0_bit[i];
+
+ for (i = 0; i < 8; i++)
+ ecc_bit[i + 14] = tmp1_bit[i] ^ comp1_bit[i];
+
+ ecc_bit[22] = tmp2_bit[0] ^ comp2_bit[0];
+ ecc_bit[23] = tmp2_bit[1] ^ comp2_bit[1];
+
+ for (i = 0; i < 24; i++)
+ ecc_sum += ecc_bit[i];
+
+ switch (ecc_sum) {
+ case 0:
+ /* Not reached because this function is not called if
+ * ECC values are equal
+ */
+ return 0;
+
+ case 1:
+ /* Uncorrectable error */
+ DEBUG(MTD_DEBUG_LEVEL0, "ECC UNCORRECTED_ERROR 1\n");
+ return -1;
+
+ case 11:
+ /* UN-Correctable error */
+ DEBUG(MTD_DEBUG_LEVEL0, "ECC UNCORRECTED_ERROR B\n");
+ return -1;
+
+ case 12:
+ /* Correctable error */
+ find_byte = (ecc_bit[23] << 8) +
+ (ecc_bit[21] << 7) +
+ (ecc_bit[19] << 6) +
+ (ecc_bit[17] << 5) +
+ (ecc_bit[15] << 4) +
+ (ecc_bit[13] << 3) +
+ (ecc_bit[11] << 2) +
+ (ecc_bit[9] << 1) +
+ ecc_bit[7];
+
+ find_bit = (ecc_bit[5] << 2) + (ecc_bit[3] << 1) + ecc_bit[1];
+
+ DEBUG(MTD_DEBUG_LEVEL0, "Correcting single bit ECC error at "
+ "offset: %d, bit: %d\n", find_byte, find_bit);
+
+ page_data[find_byte] ^= (1 << find_bit);
+
+ return 0;
+ default:
+ if (isEccFF) {
+ if (ecc_data2[0] == 0 &&
+ ecc_data2[1] == 0 &&
+ ecc_data2[2] == 0)
+ return 0;
+ }
+ DEBUG(MTD_DEBUG_LEVEL0, "UNCORRECTED_ERROR default\n");
+ return -1;
+ }
+}
+
+/**
+ * omap_correct_data - Compares the ECC read with HW generated ECC
+ * @mtd: MTD device structure
+ * @dat: page data
+ * @read_ecc: ecc read from nand flash
+ * @calc_ecc: ecc read from HW ECC registers
+ *
+ * Compares the ecc read from nand spare area with ECC registers values
+ * and if ECC's mismached, it will call 'omap_compare_ecc' for error detection
+ * and correction.
+ */
+static int omap_correct_data(struct mtd_info *mtd, u_char *dat,
+ u_char *read_ecc, u_char *calc_ecc)
+{
+ struct omap_nand_info *info = container_of(mtd, struct omap_nand_info,
+ mtd);
+ int blockCnt = 0, i = 0, ret = 0;
+
+ /* Ex NAND_ECC_HW12_2048 */
+ if ((info->nand.ecc.mode == NAND_ECC_HW) &&
+ (info->nand.ecc.size == 2048))
+ blockCnt = 4;
+ else
+ blockCnt = 1;
+
+ for (i = 0; i < blockCnt; i++) {
+ if (memcmp(read_ecc, calc_ecc, 3) != 0) {
+ ret = omap_compare_ecc(read_ecc, calc_ecc, dat);
+ if (ret < 0)
+ return ret;
+ }
+ read_ecc += 3;
+ calc_ecc += 3;
+ dat += 512;
+ }
+ return 0;
+}
+
+/**
+ * omap_calcuate_ecc - Generate non-inverted ECC bytes.
+ * @mtd: MTD device structure
+ * @dat: The pointer to data on which ecc is computed
+ * @ecc_code: The ecc_code buffer
+ *
+ * Using noninverted ECC can be considered ugly since writing a blank
+ * page ie. padding will clear the ECC bytes. This is no problem as long
+ * nobody is trying to write data on the seemingly unused page. Reading
+ * an erased page will produce an ECC mismatch between generated and read
+ * ECC bytes that has to be dealt with separately.
+ */
+static int omap_calculate_ecc(struct mtd_info *mtd, const u_char *dat,
+ u_char *ecc_code)
+{
+ struct omap_nand_info *info = container_of(mtd, struct omap_nand_info,
+ mtd);
+ unsigned long val = 0x0;
+ unsigned long reg;
+
+ /* Start Reading from HW ECC1_Result = 0x200 */
+ reg = (unsigned long)(info->gpmc_baseaddr + GPMC_ECC1_RESULT);
+ val = __raw_readl(reg);
+ *ecc_code++ = val; /* P128e, ..., P1e */
+ *ecc_code++ = val >> 16; /* P128o, ..., P1o */
+ /* P2048o, P1024o, P512o, P256o, P2048e, P1024e, P512e, P256e */
+ *ecc_code++ = ((val >> 8) & 0x0f) | ((val >> 20) & 0xf0);
+ reg += 4;
+
+ return 0;
+}
+
+/**
+ * omap_enable_hwecc - This function enables the hardware ecc functionality
+ * @mtd: MTD device structure
+ * @mode: Read/Write mode
+ */
+static void omap_enable_hwecc(struct mtd_info *mtd, int mode)
+{
+ struct omap_nand_info *info = container_of(mtd, struct omap_nand_info,
+ mtd);
+ struct nand_chip *chip = mtd->priv;
+ unsigned int dev_width = (chip->options & NAND_BUSWIDTH_16) ? 1 : 0;
+ unsigned long val = __raw_readl(info->gpmc_baseaddr + GPMC_ECC_CONFIG);
+
+ switch (mode) {
+ case NAND_ECC_READ:
+ __raw_writel(0x101, info->gpmc_baseaddr + GPMC_ECC_CONTROL);
+ /* (ECC 16 or 8 bit col) | ( CS ) | ECC Enable */
+ val = (dev_width << 7) | (info->gpmc_cs << 1) | (0x1);
+ break;
+ case NAND_ECC_READSYN:
+ __raw_writel(0x100, info->gpmc_baseaddr + GPMC_ECC_CONTROL);
+ /* (ECC 16 or 8 bit col) | ( CS ) | ECC Enable */
+ val = (dev_width << 7) | (info->gpmc_cs << 1) | (0x1);
+ break;
+ case NAND_ECC_WRITE:
+ __raw_writel(0x101, info->gpmc_baseaddr + GPMC_ECC_CONTROL);
+ /* (ECC 16 or 8 bit col) | ( CS ) | ECC Enable */
+ val = (dev_width << 7) | (info->gpmc_cs << 1) | (0x1);
+ break;
+ default:
+ DEBUG(MTD_DEBUG_LEVEL0, "Error: Unrecognized Mode[%d]!\n",
+ mode);
+ break;
+ }
+
+ __raw_writel(val, info->gpmc_baseaddr + GPMC_ECC_CONFIG);
+}
+#endif
+
+/**
+ * omap_wait - wait until the command is done
+ * @mtd: MTD device structure
+ * @chip: NAND Chip structure
+ *
+ * Wait function is called during Program and erase operations and
+ * the way it is called from MTD layer, we should wait till the NAND
+ * chip is ready after the programming/erase operation has completed.
+ *
+ * Erase can take up to 400ms and program up to 20ms according to
+ * general NAND and SmartMedia specs
+ */
+static int omap_wait(struct mtd_info *mtd, struct nand_chip *chip)
+{
+ struct nand_chip *this = mtd->priv;
+ struct omap_nand_info *info = container_of(mtd, struct omap_nand_info,
+ mtd);
+ unsigned long timeo = jiffies;
+ int status, state = this->state;
+
+ if (state == FL_ERASING)
+ timeo += (HZ * 400) / 1000;
+ else
+ timeo += (HZ * 20) / 1000;
+
+ this->IO_ADDR_W = (void *) info->gpmc_cs_baseaddr +
+ GPMC_CS_NAND_COMMAND;
+ this->IO_ADDR_R = (void *) info->gpmc_cs_baseaddr + GPMC_CS_NAND_DATA;
+
+ __raw_writeb(NAND_CMD_STATUS & 0xFF, this->IO_ADDR_W);
+
+ while (time_before(jiffies, timeo)) {
+ status = __raw_readb(this->IO_ADDR_R);
+ if (!(status & 0x40))
+ break;
+ }
+ return status;
+}
+
+/**
+ * omap_dev_ready - calls the platform specific dev_ready function
+ * @mtd: MTD device structure
+ */
+static int omap_dev_ready(struct mtd_info *mtd)
+{
+ struct omap_nand_info *info = container_of(mtd, struct omap_nand_info,
+ mtd);
+ unsigned int val = __raw_readl(info->gpmc_baseaddr + GPMC_IRQ_STATUS);
+
+ if ((val & 0x100) == 0x100) {
+ /* Clear IRQ Interrupt */
+ val |= 0x100;
+ val &= ~(0x0);
+ __raw_writel(val, info->gpmc_baseaddr + GPMC_IRQ_STATUS);
+ } else {
+ unsigned int cnt = 0;
+ while (cnt++ < 0x1FF) {
+ if ((val & 0x100) == 0x100)
+ return 0;
+ val = __raw_readl(info->gpmc_baseaddr +
+ GPMC_IRQ_STATUS);
+ }
+ }
+
+ return 1;
+}
+
+static int __devinit omap_nand_probe(struct platform_device *pdev)
+{
+ struct omap_nand_info *info;
+ struct omap_nand_platform_data *pdata;
+ int err;
+ unsigned long val;
+
+
+ pdata = pdev->dev.platform_data;
+ if (pdata == NULL) {
+ dev_err(&pdev->dev, "platform data missing\n");
+ return -ENODEV;
+ }
+
+ info = kzalloc(sizeof(struct omap_nand_info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, info);
+
+ spin_lock_init(&info->controller.lock);
+ init_waitqueue_head(&info->controller.wq);
+
+ info->pdev = pdev;
+
+ info->gpmc_cs = pdata->cs;
+ info->gpmc_baseaddr = pdata->gpmc_baseaddr;
+ info->gpmc_cs_baseaddr = pdata->gpmc_cs_baseaddr;
+
+ info->mtd.priv = &info->nand;
+ info->mtd.name = dev_name(&pdev->dev);
+ info->mtd.owner = THIS_MODULE;
+
+ err = gpmc_cs_request(info->gpmc_cs, NAND_IO_SIZE, &info->phys_base);
+ if (err < 0) {
+ dev_err(&pdev->dev, "Cannot request GPMC CS\n");
+ goto out_free_info;
+ }
+
+ /* Enable RD PIN Monitoring Reg */
+ if (pdata->dev_ready) {
+ val = gpmc_cs_read_reg(info->gpmc_cs, GPMC_CS_CONFIG1);
+ val |= WR_RD_PIN_MONITORING;
+ gpmc_cs_write_reg(info->gpmc_cs, GPMC_CS_CONFIG1, val);
+ }
+
+ val = gpmc_cs_read_reg(info->gpmc_cs, GPMC_CS_CONFIG7);
+ val &= ~(0xf << 8);
+ val |= (0xc & 0xf) << 8;
+ gpmc_cs_write_reg(info->gpmc_cs, GPMC_CS_CONFIG7, val);
+
+ /* NAND write protect off */
+ omap_nand_wp(&info->mtd, NAND_WP_OFF);
+
+ if (!request_mem_region(info->phys_base, NAND_IO_SIZE,
+ pdev->dev.driver->name)) {
+ err = -EBUSY;
+ goto out_free_cs;
+ }
+
+ info->nand.IO_ADDR_R = ioremap(info->phys_base, NAND_IO_SIZE);
+ if (!info->nand.IO_ADDR_R) {
+ err = -ENOMEM;
+ goto out_release_mem_region;
+ }
+ info->nand.controller = &info->controller;
+
+ info->nand.IO_ADDR_W = info->nand.IO_ADDR_R;
+ info->nand.cmd_ctrl = omap_hwcontrol;
+
+ /* REVISIT: only supports 16-bit NAND flash */
+
+ info->nand.read_buf = omap_read_buf16;
+ info->nand.write_buf = omap_write_buf16;
+ info->nand.verify_buf = omap_verify_buf;
+
+ /*
+ * If RDY/BSY line is connected to OMAP then use the omap ready
+ * funcrtion and the generic nand_wait function which reads the status
+ * register after monitoring the RDY/BSY line.Otherwise use a standard
+ * chip delay which is slightly more than tR (AC Timing) of the NAND
+ * device and read status register until you get a failure or success
+ */
+ if (pdata->dev_ready) {
+ info->nand.dev_ready = omap_dev_ready;
+ info->nand.chip_delay = 0;
+ } else {
+ info->nand.waitfunc = omap_wait;
+ info->nand.chip_delay = 50;
+ }
+
+ info->nand.options |= NAND_SKIP_BBTSCAN;
+ if ((gpmc_cs_read_reg(info->gpmc_cs, GPMC_CS_CONFIG1) & 0x3000)
+ == 0x1000)
+ info->nand.options |= NAND_BUSWIDTH_16;
+
+#ifdef CONFIG_MTD_NAND_OMAP_HWECC
+ info->nand.ecc.bytes = 3;
+ info->nand.ecc.size = 512;
+ info->nand.ecc.calculate = omap_calculate_ecc;
+ info->nand.ecc.hwctl = omap_enable_hwecc;
+ info->nand.ecc.correct = omap_correct_data;
+ info->nand.ecc.mode = NAND_ECC_HW;
+
+ /* init HW ECC */
+ omap_hwecc_init(&info->mtd);
+#else
+ info->nand.ecc.mode = NAND_ECC_SOFT;
+#endif
+
+ /* DIP switches on some boards change between 8 and 16 bit
+ * bus widths for flash. Try the other width if the first try fails.
+ */
+ if (nand_scan(&info->mtd, 1)) {
+ info->nand.options ^= NAND_BUSWIDTH_16;
+ if (nand_scan(&info->mtd, 1)) {
+ err = -ENXIO;
+ goto out_release_mem_region;
+ }
+ }
+
+#ifdef CONFIG_MTD_PARTITIONS
+ err = parse_mtd_partitions(&info->mtd, part_probes, &info->parts, 0);
+ if (err > 0)
+ add_mtd_partitions(&info->mtd, info->parts, err);
+ else if (pdata->parts)
+ add_mtd_partitions(&info->mtd, pdata->parts, pdata->nr_parts);
+ else
+#endif
+ add_mtd_device(&info->mtd);
+
+ platform_set_drvdata(pdev, &info->mtd);
+
+ return 0;
+
+out_release_mem_region:
+ release_mem_region(info->phys_base, NAND_IO_SIZE);
+out_free_cs:
+ gpmc_cs_free(info->gpmc_cs);
+out_free_info:
+ kfree(info);
+
+ return err;
+}
+
+static int omap_nand_remove(struct platform_device *pdev)
+{
+ struct mtd_info *mtd = platform_get_drvdata(pdev);
+ struct omap_nand_info *info = mtd->priv;
+
+ platform_set_drvdata(pdev, NULL);
+ /* Release NAND device, its internal structures and partitions */
+ nand_release(&info->mtd);
+ iounmap(info->nand.IO_ADDR_R);
+ kfree(&info->mtd);
+ return 0;
+}
+
+static struct platform_driver omap_nand_driver = {
+ .probe = omap_nand_probe,
+ .remove = omap_nand_remove,
+ .driver = {
+ .name = DRIVER_NAME,
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init omap_nand_init(void)
+{
+ printk(KERN_INFO "%s driver initializing\n", DRIVER_NAME);
+ return platform_driver_register(&omap_nand_driver);
+}
+
+static void __exit omap_nand_exit(void)
+{
+ platform_driver_unregister(&omap_nand_driver);
+}
+
+module_init(omap_nand_init);
+module_exit(omap_nand_exit);
+
+MODULE_ALIAS(DRIVER_NAME);
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Glue layer for NAND flash on TI OMAP boards");
diff --git a/drivers/mtd/nand/orion_nand.c b/drivers/mtd/nand/orion_nand.c
index c2dfd3ea353d..7ad972229db4 100644
--- a/drivers/mtd/nand/orion_nand.c
+++ b/drivers/mtd/nand/orion_nand.c
@@ -47,6 +47,28 @@ static void orion_nand_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl
writeb(cmd, nc->IO_ADDR_W + offs);
}
+static void orion_nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
+{
+ struct nand_chip *chip = mtd->priv;
+ void __iomem *io_base = chip->IO_ADDR_R;
+ uint64_t *buf64;
+ int i = 0;
+
+ while (len && (unsigned long)buf & 7) {
+ *buf++ = readb(io_base);
+ len--;
+ }
+ buf64 = (uint64_t *)buf;
+ while (i < len/8) {
+ uint64_t x;
+ asm ("ldrd\t%0, [%1]" : "=r" (x) : "r" (io_base));
+ buf64[i++] = x;
+ }
+ i *= 8;
+ while (i < len)
+ buf[i++] = readb(io_base);
+}
+
static int __init orion_nand_probe(struct platform_device *pdev)
{
struct mtd_info *mtd;
@@ -83,6 +105,7 @@ static int __init orion_nand_probe(struct platform_device *pdev)
nc->priv = board;
nc->IO_ADDR_R = nc->IO_ADDR_W = io_base;
nc->cmd_ctrl = orion_nand_cmd_ctrl;
+ nc->read_buf = orion_nand_read_buf;
nc->ecc.mode = NAND_ECC_SOFT;
if (board->chip_delay)
diff --git a/drivers/mtd/nand/plat_nand.c b/drivers/mtd/nand/plat_nand.c
index 86e1d08eee00..4e16c6f5bdd5 100644
--- a/drivers/mtd/nand/plat_nand.c
+++ b/drivers/mtd/nand/plat_nand.c
@@ -61,6 +61,8 @@ static int __devinit plat_nand_probe(struct platform_device *pdev)
data->chip.cmd_ctrl = pdata->ctrl.cmd_ctrl;
data->chip.dev_ready = pdata->ctrl.dev_ready;
data->chip.select_chip = pdata->ctrl.select_chip;
+ data->chip.write_buf = pdata->ctrl.write_buf;
+ data->chip.read_buf = pdata->ctrl.read_buf;
data->chip.chip_delay = pdata->chip.chip_delay;
data->chip.options |= pdata->chip.options;
@@ -70,6 +72,13 @@ static int __devinit plat_nand_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, data);
+ /* Handle any platform specific setup */
+ if (pdata->ctrl.probe) {
+ res = pdata->ctrl.probe(pdev);
+ if (res)
+ goto out;
+ }
+
/* Scan to find existance of the device */
if (nand_scan(&data->mtd, 1)) {
res = -ENXIO;
@@ -86,6 +95,8 @@ static int __devinit plat_nand_probe(struct platform_device *pdev)
return 0;
}
}
+ if (pdata->chip.set_parts)
+ pdata->chip.set_parts(data->mtd.size, &pdata->chip);
if (pdata->chip.partitions) {
data->parts = pdata->chip.partitions;
res = add_mtd_partitions(&data->mtd, data->parts,
@@ -99,6 +110,8 @@ static int __devinit plat_nand_probe(struct platform_device *pdev)
nand_release(&data->mtd);
out:
+ if (pdata->ctrl.remove)
+ pdata->ctrl.remove(pdev);
platform_set_drvdata(pdev, NULL);
iounmap(data->io_base);
kfree(data);
@@ -111,15 +124,15 @@ out:
static int __devexit plat_nand_remove(struct platform_device *pdev)
{
struct plat_nand_data *data = platform_get_drvdata(pdev);
-#ifdef CONFIG_MTD_PARTITIONS
struct platform_nand_data *pdata = pdev->dev.platform_data;
-#endif
nand_release(&data->mtd);
#ifdef CONFIG_MTD_PARTITIONS
if (data->parts && data->parts != pdata->chip.partitions)
kfree(data->parts);
#endif
+ if (pdata->ctrl.remove)
+ pdata->ctrl.remove(pdev);
iounmap(data->io_base);
kfree(data);
@@ -128,7 +141,7 @@ static int __devexit plat_nand_remove(struct platform_device *pdev)
static struct platform_driver plat_nand_driver = {
.probe = plat_nand_probe,
- .remove = plat_nand_remove,
+ .remove = __devexit_p(plat_nand_remove),
.driver = {
.name = "gen_nand",
.owner = THIS_MODULE,
diff --git a/drivers/mtd/nand/s3c2410.c b/drivers/mtd/nand/s3c2410.c
index 8e375d5fe231..11dc7e69c4fb 100644
--- a/drivers/mtd/nand/s3c2410.c
+++ b/drivers/mtd/nand/s3c2410.c
@@ -74,6 +74,14 @@ static struct nand_ecclayout nand_hw_eccoob = {
struct s3c2410_nand_info;
+/**
+ * struct s3c2410_nand_mtd - driver MTD structure
+ * @mtd: The MTD instance to pass to the MTD layer.
+ * @chip: The NAND chip information.
+ * @set: The platform information supplied for this set of NAND chips.
+ * @info: Link back to the hardware information.
+ * @scan_res: The result from calling nand_scan_ident().
+*/
struct s3c2410_nand_mtd {
struct mtd_info mtd;
struct nand_chip chip;
@@ -90,6 +98,21 @@ enum s3c_cpu_type {
/* overview of the s3c2410 nand state */
+/**
+ * struct s3c2410_nand_info - NAND controller state.
+ * @mtds: An array of MTD instances on this controoler.
+ * @platform: The platform data for this board.
+ * @device: The platform device we bound to.
+ * @area: The IO area resource that came from request_mem_region().
+ * @clk: The clock resource for this controller.
+ * @regs: The area mapped for the hardware registers described by @area.
+ * @sel_reg: Pointer to the register controlling the NAND selection.
+ * @sel_bit: The bit in @sel_reg to select the NAND chip.
+ * @mtd_count: The number of MTDs created from this controller.
+ * @save_sel: The contents of @sel_reg to be saved over suspend.
+ * @clk_rate: The clock rate from @clk.
+ * @cpu_type: The exact type of this controller.
+ */
struct s3c2410_nand_info {
/* mtd info */
struct nand_hw_control controller;
@@ -145,12 +168,19 @@ static inline int allow_clk_stop(struct s3c2410_nand_info *info)
#define NS_IN_KHZ 1000000
+/**
+ * s3c_nand_calc_rate - calculate timing data.
+ * @wanted: The cycle time in nanoseconds.
+ * @clk: The clock rate in kHz.
+ * @max: The maximum divider value.
+ *
+ * Calculate the timing value from the given parameters.
+ */
static int s3c_nand_calc_rate(int wanted, unsigned long clk, int max)
{
int result;
- result = (wanted * clk) / NS_IN_KHZ;
- result++;
+ result = DIV_ROUND_UP((wanted * clk), NS_IN_KHZ);
pr_debug("result %d from %ld, %d\n", result, clk, wanted);
@@ -169,13 +199,21 @@ static int s3c_nand_calc_rate(int wanted, unsigned long clk, int max)
/* controller setup */
+/**
+ * s3c2410_nand_setrate - setup controller timing information.
+ * @info: The controller instance.
+ *
+ * Given the information supplied by the platform, calculate and set
+ * the necessary timing registers in the hardware to generate the
+ * necessary timing cycles to the hardware.
+ */
static int s3c2410_nand_setrate(struct s3c2410_nand_info *info)
{
struct s3c2410_platform_nand *plat = info->platform;
int tacls_max = (info->cpu_type == TYPE_S3C2412) ? 8 : 4;
int tacls, twrph0, twrph1;
unsigned long clkrate = clk_get_rate(info->clk);
- unsigned long set, cfg, mask;
+ unsigned long uninitialized_var(set), cfg, uninitialized_var(mask);
unsigned long flags;
/* calculate the timing information for the controller */
@@ -215,9 +253,9 @@ static int s3c2410_nand_setrate(struct s3c2410_nand_info *info)
case TYPE_S3C2440:
case TYPE_S3C2412:
- mask = (S3C2410_NFCONF_TACLS(tacls_max - 1) |
- S3C2410_NFCONF_TWRPH0(7) |
- S3C2410_NFCONF_TWRPH1(7));
+ mask = (S3C2440_NFCONF_TACLS(tacls_max - 1) |
+ S3C2440_NFCONF_TWRPH0(7) |
+ S3C2440_NFCONF_TWRPH1(7));
set = S3C2440_NFCONF_TACLS(tacls - 1);
set |= S3C2440_NFCONF_TWRPH0(twrph0 - 1);
@@ -225,14 +263,9 @@ static int s3c2410_nand_setrate(struct s3c2410_nand_info *info)
break;
default:
- /* keep compiler happy */
- mask = 0;
- set = 0;
BUG();
}
- dev_dbg(info->device, "NF_CONF is 0x%lx\n", cfg);
-
local_irq_save(flags);
cfg = readl(info->regs + S3C2410_NFCONF);
@@ -242,9 +275,18 @@ static int s3c2410_nand_setrate(struct s3c2410_nand_info *info)
local_irq_restore(flags);
+ dev_dbg(info->device, "NF_CONF is 0x%lx\n", cfg);
+
return 0;
}
+/**
+ * s3c2410_nand_inithw - basic hardware initialisation
+ * @info: The hardware state.
+ *
+ * Do the basic initialisation of the hardware, using s3c2410_nand_setrate()
+ * to setup the hardware access speeds and set the controller to be enabled.
+*/
static int s3c2410_nand_inithw(struct s3c2410_nand_info *info)
{
int ret;
@@ -268,8 +310,19 @@ static int s3c2410_nand_inithw(struct s3c2410_nand_info *info)
return 0;
}
-/* select chip */
-
+/**
+ * s3c2410_nand_select_chip - select the given nand chip
+ * @mtd: The MTD instance for this chip.
+ * @chip: The chip number.
+ *
+ * This is called by the MTD layer to either select a given chip for the
+ * @mtd instance, or to indicate that the access has finished and the
+ * chip can be de-selected.
+ *
+ * The routine ensures that the nFCE line is correctly setup, and any
+ * platform specific selection code is called to route nFCE to the specific
+ * chip.
+ */
static void s3c2410_nand_select_chip(struct mtd_info *mtd, int chip)
{
struct s3c2410_nand_info *info;
@@ -530,7 +583,16 @@ static void s3c2410_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
static void s3c2440_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
{
struct s3c2410_nand_info *info = s3c2410_nand_mtd_toinfo(mtd);
- readsl(info->regs + S3C2440_NFDATA, buf, len / 4);
+
+ readsl(info->regs + S3C2440_NFDATA, buf, len >> 2);
+
+ /* cleanup if we've got less than a word to do */
+ if (len & 3) {
+ buf += len & ~3;
+
+ for (; len & 3; len--)
+ *buf++ = readb(info->regs + S3C2440_NFDATA);
+ }
}
static void s3c2410_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len)
@@ -542,7 +604,16 @@ static void s3c2410_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int
static void s3c2440_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len)
{
struct s3c2410_nand_info *info = s3c2410_nand_mtd_toinfo(mtd);
- writesl(info->regs + S3C2440_NFDATA, buf, len / 4);
+
+ writesl(info->regs + S3C2440_NFDATA, buf, len >> 2);
+
+ /* cleanup any fractional write */
+ if (len & 3) {
+ buf += len & ~3;
+
+ for (; len & 3; len--, buf++)
+ writeb(*buf, info->regs + S3C2440_NFDATA);
+ }
}
/* cpufreq driver support */
@@ -593,7 +664,7 @@ static inline void s3c2410_nand_cpufreq_deregister(struct s3c2410_nand_info *inf
/* device management functions */
-static int s3c2410_nand_remove(struct platform_device *pdev)
+static int s3c24xx_nand_remove(struct platform_device *pdev)
{
struct s3c2410_nand_info *info = to_nand_info(pdev);
@@ -645,17 +716,31 @@ static int s3c2410_nand_remove(struct platform_device *pdev)
}
#ifdef CONFIG_MTD_PARTITIONS
+const char *part_probes[] = { "cmdlinepart", NULL };
static int s3c2410_nand_add_partition(struct s3c2410_nand_info *info,
struct s3c2410_nand_mtd *mtd,
struct s3c2410_nand_set *set)
{
+ struct mtd_partition *part_info;
+ int nr_part = 0;
+
if (set == NULL)
return add_mtd_device(&mtd->mtd);
- if (set->nr_partitions > 0 && set->partitions != NULL) {
- return add_mtd_partitions(&mtd->mtd, set->partitions, set->nr_partitions);
+ if (set->nr_partitions == 0) {
+ mtd->mtd.name = set->name;
+ nr_part = parse_mtd_partitions(&mtd->mtd, part_probes,
+ &part_info, 0);
+ } else {
+ if (set->nr_partitions > 0 && set->partitions != NULL) {
+ nr_part = set->nr_partitions;
+ part_info = set->partitions;
+ }
}
+ if (nr_part > 0 && part_info)
+ return add_mtd_partitions(&mtd->mtd, part_info, nr_part);
+
return add_mtd_device(&mtd->mtd);
}
#else
@@ -667,11 +752,16 @@ static int s3c2410_nand_add_partition(struct s3c2410_nand_info *info,
}
#endif
-/* s3c2410_nand_init_chip
+/**
+ * s3c2410_nand_init_chip - initialise a single instance of an chip
+ * @info: The base NAND controller the chip is on.
+ * @nmtd: The new controller MTD instance to fill in.
+ * @set: The information passed from the board specific platform data.
*
- * init a single instance of an chip
-*/
-
+ * Initialise the given @nmtd from the information in @info and @set. This
+ * readies the structure for use with the MTD layer functions by ensuring
+ * all pointers are setup and the necessary control routines selected.
+ */
static void s3c2410_nand_init_chip(struct s3c2410_nand_info *info,
struct s3c2410_nand_mtd *nmtd,
struct s3c2410_nand_set *set)
@@ -757,14 +847,40 @@ static void s3c2410_nand_init_chip(struct s3c2410_nand_info *info,
if (set->disable_ecc)
chip->ecc.mode = NAND_ECC_NONE;
+
+ switch (chip->ecc.mode) {
+ case NAND_ECC_NONE:
+ dev_info(info->device, "NAND ECC disabled\n");
+ break;
+ case NAND_ECC_SOFT:
+ dev_info(info->device, "NAND soft ECC\n");
+ break;
+ case NAND_ECC_HW:
+ dev_info(info->device, "NAND hardware ECC\n");
+ break;
+ default:
+ dev_info(info->device, "NAND ECC UNKNOWN\n");
+ break;
+ }
+
+ /* If you use u-boot BBT creation code, specifying this flag will
+ * let the kernel fish out the BBT from the NAND, and also skip the
+ * full NAND scan that can take 1/2s or so. Little things... */
+ if (set->flash_bbt)
+ chip->options |= NAND_USE_FLASH_BBT | NAND_SKIP_BBTSCAN;
}
-/* s3c2410_nand_update_chip
+/**
+ * s3c2410_nand_update_chip - post probe update
+ * @info: The controller instance.
+ * @nmtd: The driver version of the MTD instance.
*
- * post-probe chip update, to change any items, such as the
- * layout for large page nand
- */
-
+ * This routine is called after the chip probe has succesfully completed
+ * and the relevant per-chip information updated. This call ensure that
+ * we update the internal state accordingly.
+ *
+ * The internal state is currently limited to the ECC state information.
+*/
static void s3c2410_nand_update_chip(struct s3c2410_nand_info *info,
struct s3c2410_nand_mtd *nmtd)
{
@@ -773,33 +889,33 @@ static void s3c2410_nand_update_chip(struct s3c2410_nand_info *info,
dev_dbg(info->device, "chip %p => page shift %d\n",
chip, chip->page_shift);
- if (hardware_ecc) {
+ if (chip->ecc.mode != NAND_ECC_HW)
+ return;
+
/* change the behaviour depending on wether we are using
* the large or small page nand device */
- if (chip->page_shift > 10) {
- chip->ecc.size = 256;
- chip->ecc.bytes = 3;
- } else {
- chip->ecc.size = 512;
- chip->ecc.bytes = 3;
- chip->ecc.layout = &nand_hw_eccoob;
- }
+ if (chip->page_shift > 10) {
+ chip->ecc.size = 256;
+ chip->ecc.bytes = 3;
+ } else {
+ chip->ecc.size = 512;
+ chip->ecc.bytes = 3;
+ chip->ecc.layout = &nand_hw_eccoob;
}
}
-/* s3c2410_nand_probe
+/* s3c24xx_nand_probe
*
* called by device layer when it finds a device matching
* one our driver can handled. This code checks to see if
* it can allocate all necessary resources then calls the
* nand layer to look for devices
*/
-
-static int s3c24xx_nand_probe(struct platform_device *pdev,
- enum s3c_cpu_type cpu_type)
+static int s3c24xx_nand_probe(struct platform_device *pdev)
{
struct s3c2410_platform_nand *plat = to_nand_plat(pdev);
+ enum s3c_cpu_type cpu_type;
struct s3c2410_nand_info *info;
struct s3c2410_nand_mtd *nmtd;
struct s3c2410_nand_set *sets;
@@ -809,6 +925,8 @@ static int s3c24xx_nand_probe(struct platform_device *pdev,
int nr_sets;
int setno;
+ cpu_type = platform_get_device_id(pdev)->driver_data;
+
pr_debug("s3c2410_nand_probe(%p)\n", pdev);
info = kmalloc(sizeof(*info), GFP_KERNEL);
@@ -922,7 +1040,7 @@ static int s3c24xx_nand_probe(struct platform_device *pdev,
return 0;
exit_error:
- s3c2410_nand_remove(pdev);
+ s3c24xx_nand_remove(pdev);
if (err == 0)
err = -EINVAL;
@@ -983,50 +1101,33 @@ static int s3c24xx_nand_resume(struct platform_device *dev)
/* driver device registration */
-static int s3c2410_nand_probe(struct platform_device *dev)
-{
- return s3c24xx_nand_probe(dev, TYPE_S3C2410);
-}
-
-static int s3c2440_nand_probe(struct platform_device *dev)
-{
- return s3c24xx_nand_probe(dev, TYPE_S3C2440);
-}
-
-static int s3c2412_nand_probe(struct platform_device *dev)
-{
- return s3c24xx_nand_probe(dev, TYPE_S3C2412);
-}
-
-static struct platform_driver s3c2410_nand_driver = {
- .probe = s3c2410_nand_probe,
- .remove = s3c2410_nand_remove,
- .suspend = s3c24xx_nand_suspend,
- .resume = s3c24xx_nand_resume,
- .driver = {
- .name = "s3c2410-nand",
- .owner = THIS_MODULE,
+static struct platform_device_id s3c24xx_driver_ids[] = {
+ {
+ .name = "s3c2410-nand",
+ .driver_data = TYPE_S3C2410,
+ }, {
+ .name = "s3c2440-nand",
+ .driver_data = TYPE_S3C2440,
+ }, {
+ .name = "s3c2412-nand",
+ .driver_data = TYPE_S3C2412,
+ }, {
+ .name = "s3c6400-nand",
+ .driver_data = TYPE_S3C2412, /* compatible with 2412 */
},
+ { }
};
-static struct platform_driver s3c2440_nand_driver = {
- .probe = s3c2440_nand_probe,
- .remove = s3c2410_nand_remove,
- .suspend = s3c24xx_nand_suspend,
- .resume = s3c24xx_nand_resume,
- .driver = {
- .name = "s3c2440-nand",
- .owner = THIS_MODULE,
- },
-};
+MODULE_DEVICE_TABLE(platform, s3c24xx_driver_ids);
-static struct platform_driver s3c2412_nand_driver = {
- .probe = s3c2412_nand_probe,
- .remove = s3c2410_nand_remove,
+static struct platform_driver s3c24xx_nand_driver = {
+ .probe = s3c24xx_nand_probe,
+ .remove = s3c24xx_nand_remove,
.suspend = s3c24xx_nand_suspend,
.resume = s3c24xx_nand_resume,
+ .id_table = s3c24xx_driver_ids,
.driver = {
- .name = "s3c2412-nand",
+ .name = "s3c24xx-nand",
.owner = THIS_MODULE,
},
};
@@ -1035,16 +1136,12 @@ static int __init s3c2410_nand_init(void)
{
printk("S3C24XX NAND Driver, (c) 2004 Simtec Electronics\n");
- platform_driver_register(&s3c2412_nand_driver);
- platform_driver_register(&s3c2440_nand_driver);
- return platform_driver_register(&s3c2410_nand_driver);
+ return platform_driver_register(&s3c24xx_nand_driver);
}
static void __exit s3c2410_nand_exit(void)
{
- platform_driver_unregister(&s3c2412_nand_driver);
- platform_driver_unregister(&s3c2440_nand_driver);
- platform_driver_unregister(&s3c2410_nand_driver);
+ platform_driver_unregister(&s3c24xx_nand_driver);
}
module_init(s3c2410_nand_init);
@@ -1053,6 +1150,3 @@ module_exit(s3c2410_nand_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
MODULE_DESCRIPTION("S3C24XX MTD NAND driver");
-MODULE_ALIAS("platform:s3c2410-nand");
-MODULE_ALIAS("platform:s3c2412-nand");
-MODULE_ALIAS("platform:s3c2440-nand");
diff --git a/drivers/mtd/nand/txx9ndfmc.c b/drivers/mtd/nand/txx9ndfmc.c
index 812479264896..488088eff2ca 100644
--- a/drivers/mtd/nand/txx9ndfmc.c
+++ b/drivers/mtd/nand/txx9ndfmc.c
@@ -64,7 +64,7 @@ struct txx9ndfmc_priv {
struct nand_chip chip;
struct mtd_info mtd;
int cs;
- char mtdname[BUS_ID_SIZE + 2];
+ const char *mtdname;
};
#define MAX_TXX9NDFMC_DEV 4
@@ -334,16 +334,23 @@ static int __init txx9ndfmc_probe(struct platform_device *dev)
if (plat->ch_mask != 1) {
txx9_priv->cs = i;
- sprintf(txx9_priv->mtdname, "%s.%u",
- dev_name(&dev->dev), i);
+ txx9_priv->mtdname = kasprintf(GFP_KERNEL, "%s.%u",
+ dev_name(&dev->dev), i);
} else {
txx9_priv->cs = -1;
- strcpy(txx9_priv->mtdname, dev_name(&dev->dev));
+ txx9_priv->mtdname = kstrdup(dev_name(&dev->dev),
+ GFP_KERNEL);
+ }
+ if (!txx9_priv->mtdname) {
+ kfree(txx9_priv);
+ dev_err(&dev->dev, "Unable to allocate MTD name.\n");
+ continue;
}
if (plat->wide_mask & (1 << i))
chip->options |= NAND_BUSWIDTH_16;
if (nand_scan(mtd, 1)) {
+ kfree(txx9_priv->mtdname);
kfree(txx9_priv);
continue;
}
@@ -385,6 +392,7 @@ static int __exit txx9ndfmc_remove(struct platform_device *dev)
kfree(drvdata->parts[i]);
#endif
del_mtd_device(mtd);
+ kfree(txx9_priv->mtdname);
kfree(txx9_priv);
}
return 0;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 21:59:32 +0100