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-rw-r--r--drivers/mtd/nand/Kconfig42
-rw-r--r--drivers/mtd/nand/Makefile4
-rw-r--r--drivers/mtd/nand/atmel_nand.c58
-rw-r--r--drivers/mtd/nand/cs553x_nand.c2
-rw-r--r--drivers/mtd/nand/fsl_elbc_nand.c3
-rw-r--r--drivers/mtd/nand/fsl_upm.c68
-rw-r--r--drivers/mtd/nand/gpio.c375
-rw-r--r--drivers/mtd/nand/mxc_nand.c1077
-rw-r--r--drivers/mtd/nand/nand_base.c16
-rw-r--r--drivers/mtd/nand/nand_ecc.c554
-rw-r--r--drivers/mtd/nand/nandsim.c1
-rw-r--r--drivers/mtd/nand/pxa3xx_nand.c147
-rw-r--r--drivers/mtd/nand/sh_flctl.c878
-rw-r--r--drivers/mtd/nand/toto.c206
14 files changed, 2932 insertions, 499 deletions
diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
index 41f361c49b3..1c2e9450d66 100644
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -56,6 +56,12 @@ config MTD_NAND_H1900
help
This enables the driver for the iPAQ h1900 flash.
+config MTD_NAND_GPIO
+ tristate "GPIO NAND Flash driver"
+ depends on GENERIC_GPIO && ARM
+ help
+ This enables a GPIO based NAND flash driver.
+
config MTD_NAND_SPIA
tristate "NAND Flash device on SPIA board"
depends on ARCH_P720T
@@ -68,12 +74,6 @@ config MTD_NAND_AMS_DELTA
help
Support for NAND flash on Amstrad E3 (Delta).
-config MTD_NAND_TOTO
- tristate "NAND Flash device on TOTO board"
- depends on ARCH_OMAP && BROKEN
- help
- Support for NAND flash on Texas Instruments Toto platform.
-
config MTD_NAND_TS7250
tristate "NAND Flash device on TS-7250 board"
depends on MACH_TS72XX
@@ -163,13 +163,6 @@ config MTD_NAND_S3C2410_HWECC
incorrect ECC generation, and if using these, the default of
software ECC is preferable.
-config MTD_NAND_NDFC
- tristate "NDFC NanD Flash Controller"
- depends on 4xx && !PPC_MERGE
- select MTD_NAND_ECC_SMC
- help
- NDFC Nand Flash Controllers are integrated in IBM/AMCC's 4xx SoCs
-
config MTD_NAND_S3C2410_CLKSTOP
bool "S3C2410 NAND IDLE clock stop"
depends on MTD_NAND_S3C2410
@@ -340,6 +333,13 @@ config MTD_NAND_PXA3xx
This enables the driver for the NAND flash device found on
PXA3xx processors
+config MTD_NAND_PXA3xx_BUILTIN
+ bool "Use builtin definitions for some NAND chips (deprecated)"
+ depends on MTD_NAND_PXA3xx
+ help
+ This enables builtin definitions for some NAND chips. This
+ is deprecated in favor of platform specific data.
+
config MTD_NAND_CM_X270
tristate "Support for NAND Flash on CM-X270 modules"
depends on MTD_NAND && MACH_ARMCORE
@@ -400,10 +400,24 @@ config MTD_NAND_FSL_ELBC
config MTD_NAND_FSL_UPM
tristate "Support for NAND on Freescale UPM"
- depends on MTD_NAND && OF_GPIO && (PPC_83xx || PPC_85xx)
+ depends on MTD_NAND && (PPC_83xx || PPC_85xx)
select FSL_LBC
help
Enables support for NAND Flash chips wired onto Freescale PowerPC
processor localbus with User-Programmable Machine support.
+config MTD_NAND_MXC
+ tristate "MXC NAND support"
+ depends on ARCH_MX2
+ help
+ This enables the driver for the NAND flash controller on the
+ MXC processors.
+
+config MTD_NAND_SH_FLCTL
+ tristate "Support for NAND on Renesas SuperH FLCTL"
+ depends on MTD_NAND && SUPERH && CPU_SUBTYPE_SH7723
+ help
+ Several Renesas SuperH CPU has FLCTL. This option enables support
+ for NAND Flash using FLCTL. This driver support SH7723.
+
endif # MTD_NAND
diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
index b786c5da82d..b661586afbf 100644
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -8,7 +8,6 @@ obj-$(CONFIG_MTD_NAND_IDS) += nand_ids.o
obj-$(CONFIG_MTD_NAND_CAFE) += cafe_nand.o
obj-$(CONFIG_MTD_NAND_SPIA) += spia.o
obj-$(CONFIG_MTD_NAND_AMS_DELTA) += ams-delta.o
-obj-$(CONFIG_MTD_NAND_TOTO) += toto.o
obj-$(CONFIG_MTD_NAND_AUTCPU12) += autcpu12.o
obj-$(CONFIG_MTD_NAND_EDB7312) += edb7312.o
obj-$(CONFIG_MTD_NAND_AU1550) += au1550nd.o
@@ -24,6 +23,7 @@ obj-$(CONFIG_MTD_NAND_NANDSIM) += nandsim.o
obj-$(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_CM_X270) += cmx270_nand.o
obj-$(CONFIG_MTD_NAND_BASLER_EXCITE) += excite_nandflash.o
obj-$(CONFIG_MTD_NAND_PXA3xx) += pxa3xx_nand.o
@@ -34,5 +34,7 @@ obj-$(CONFIG_MTD_NAND_PASEMI) += pasemi_nand.o
obj-$(CONFIG_MTD_NAND_ORION) += orion_nand.o
obj-$(CONFIG_MTD_NAND_FSL_ELBC) += fsl_elbc_nand.o
obj-$(CONFIG_MTD_NAND_FSL_UPM) += fsl_upm.o
+obj-$(CONFIG_MTD_NAND_SH_FLCTL) += sh_flctl.o
+obj-$(CONFIG_MTD_NAND_MXC) += mxc_nand.o
nand-objs := nand_base.o nand_bbt.o
diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c
index 3387e0d5076..c98c1570a40 100644
--- a/drivers/mtd/nand/atmel_nand.c
+++ b/drivers/mtd/nand/atmel_nand.c
@@ -174,48 +174,6 @@ static void atmel_write_buf16(struct mtd_info *mtd, const u8 *buf, int len)
}
/*
- * write oob for small pages
- */
-static int atmel_nand_write_oob_512(struct mtd_info *mtd,
- struct nand_chip *chip, int page)
-{
- int chunk = chip->ecc.bytes + chip->ecc.prepad + chip->ecc.postpad;
- int eccsize = chip->ecc.size, length = mtd->oobsize;
- int len, pos, status = 0;
- const uint8_t *bufpoi = chip->oob_poi;
-
- pos = eccsize + chunk;
-
- chip->cmdfunc(mtd, NAND_CMD_SEQIN, pos, page);
- len = min_t(int, length, chunk);
- chip->write_buf(mtd, bufpoi, len);
- bufpoi += len;
- length -= len;
- if (length > 0)
- chip->write_buf(mtd, bufpoi, length);
-
- chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
- status = chip->waitfunc(mtd, chip);
-
- return status & NAND_STATUS_FAIL ? -EIO : 0;
-
-}
-
-/*
- * read oob for small pages
- */
-static int atmel_nand_read_oob_512(struct mtd_info *mtd,
- struct nand_chip *chip, int page, int sndcmd)
-{
- if (sndcmd) {
- chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page);
- sndcmd = 0;
- }
- chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
- return sndcmd;
-}
-
-/*
* Calculate HW ECC
*
* function called after a write
@@ -235,14 +193,14 @@ static int atmel_nand_calculate(struct mtd_info *mtd,
/* get the first 2 ECC bytes */
ecc_value = ecc_readl(host->ecc, PR);
- ecc_code[eccpos[0]] = ecc_value & 0xFF;
- ecc_code[eccpos[1]] = (ecc_value >> 8) & 0xFF;
+ ecc_code[0] = ecc_value & 0xFF;
+ ecc_code[1] = (ecc_value >> 8) & 0xFF;
/* get the last 2 ECC bytes */
ecc_value = ecc_readl(host->ecc, NPR) & ATMEL_ECC_NPARITY;
- ecc_code[eccpos[2]] = ecc_value & 0xFF;
- ecc_code[eccpos[3]] = (ecc_value >> 8) & 0xFF;
+ ecc_code[2] = ecc_value & 0xFF;
+ ecc_code[3] = (ecc_value >> 8) & 0xFF;
return 0;
}
@@ -476,14 +434,12 @@ static int __init atmel_nand_probe(struct platform_device *pdev)
res = -EIO;
goto err_ecc_ioremap;
}
- nand_chip->ecc.mode = NAND_ECC_HW_SYNDROME;
+ nand_chip->ecc.mode = NAND_ECC_HW;
nand_chip->ecc.calculate = atmel_nand_calculate;
nand_chip->ecc.correct = atmel_nand_correct;
nand_chip->ecc.hwctl = atmel_nand_hwctl;
nand_chip->ecc.read_page = atmel_nand_read_page;
nand_chip->ecc.bytes = 4;
- nand_chip->ecc.prepad = 0;
- nand_chip->ecc.postpad = 0;
}
nand_chip->chip_delay = 20; /* 20us command delay time */
@@ -514,7 +470,7 @@ static int __init atmel_nand_probe(struct platform_device *pdev)
goto err_scan_ident;
}
- if (nand_chip->ecc.mode == NAND_ECC_HW_SYNDROME) {
+ if (nand_chip->ecc.mode == NAND_ECC_HW) {
/* ECC is calculated for the whole page (1 step) */
nand_chip->ecc.size = mtd->writesize;
@@ -522,8 +478,6 @@ static int __init atmel_nand_probe(struct platform_device *pdev)
switch (mtd->writesize) {
case 512:
nand_chip->ecc.layout = &atmel_oobinfo_small;
- nand_chip->ecc.read_oob = atmel_nand_read_oob_512;
- nand_chip->ecc.write_oob = atmel_nand_write_oob_512;
ecc_writel(host->ecc, MR, ATMEL_ECC_PAGESIZE_528);
break;
case 1024:
diff --git a/drivers/mtd/nand/cs553x_nand.c b/drivers/mtd/nand/cs553x_nand.c
index 3370a800fd3..9f1b451005c 100644
--- a/drivers/mtd/nand/cs553x_nand.c
+++ b/drivers/mtd/nand/cs553x_nand.c
@@ -289,8 +289,10 @@ static int __init cs553x_init(void)
int i;
uint64_t val;
+#ifdef CONFIG_MTD_PARTITIONS
int mtd_parts_nb = 0;
struct mtd_partition *mtd_parts = NULL;
+#endif
/* If the CPU isn't a Geode GX or LX, abort */
if (!is_geode())
diff --git a/drivers/mtd/nand/fsl_elbc_nand.c b/drivers/mtd/nand/fsl_elbc_nand.c
index 98ad3cefcaf..4aa5bd6158d 100644
--- a/drivers/mtd/nand/fsl_elbc_nand.c
+++ b/drivers/mtd/nand/fsl_elbc_nand.c
@@ -918,8 +918,7 @@ static int __devinit fsl_elbc_chip_probe(struct fsl_elbc_ctrl *ctrl,
#ifdef CONFIG_MTD_OF_PARTS
if (ret == 0) {
- ret = of_mtd_parse_partitions(priv->dev, &priv->mtd,
- node, &parts);
+ ret = of_mtd_parse_partitions(priv->dev, node, &parts);
if (ret < 0)
goto err;
}
diff --git a/drivers/mtd/nand/fsl_upm.c b/drivers/mtd/nand/fsl_upm.c
index 1ebfd87f00b..024e3fffd4b 100644
--- a/drivers/mtd/nand/fsl_upm.c
+++ b/drivers/mtd/nand/fsl_upm.c
@@ -13,6 +13,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/delay.h>
#include <linux/mtd/nand.h>
#include <linux/mtd/nand_ecc.h>
#include <linux/mtd/partitions.h>
@@ -36,8 +37,6 @@ struct fsl_upm_nand {
uint8_t upm_cmd_offset;
void __iomem *io_base;
int rnb_gpio;
- const uint32_t *wait_pattern;
- const uint32_t *wait_write;
int chip_delay;
};
@@ -61,10 +60,11 @@ static void fun_wait_rnb(struct fsl_upm_nand *fun)
if (fun->rnb_gpio >= 0) {
while (--cnt && !fun_chip_ready(&fun->mtd))
cpu_relax();
+ if (!cnt)
+ dev_err(fun->dev, "tired waiting for RNB\n");
+ } else {
+ ndelay(100);
}
-
- if (!cnt)
- dev_err(fun->dev, "tired waiting for RNB\n");
}
static void fun_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
@@ -89,8 +89,7 @@ static void fun_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
fsl_upm_run_pattern(&fun->upm, fun->io_base, cmd);
- if (fun->wait_pattern)
- fun_wait_rnb(fun);
+ fun_wait_rnb(fun);
}
static uint8_t fun_read_byte(struct mtd_info *mtd)
@@ -116,14 +115,16 @@ static void fun_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len)
for (i = 0; i < len; i++) {
out_8(fun->chip.IO_ADDR_W, buf[i]);
- if (fun->wait_write)
- fun_wait_rnb(fun);
+ fun_wait_rnb(fun);
}
}
-static int __devinit fun_chip_init(struct fsl_upm_nand *fun)
+static int __devinit fun_chip_init(struct fsl_upm_nand *fun,
+ const struct device_node *upm_np,
+ const struct resource *io_res)
{
int ret;
+ struct device_node *flash_np;
#ifdef CONFIG_MTD_PARTITIONS
static const char *part_types[] = { "cmdlinepart", NULL, };
#endif
@@ -143,18 +144,37 @@ static int __devinit fun_chip_init(struct fsl_upm_nand *fun)
fun->mtd.priv = &fun->chip;
fun->mtd.owner = THIS_MODULE;
+ flash_np = of_get_next_child(upm_np, NULL);
+ if (!flash_np)
+ return -ENODEV;
+
+ fun->mtd.name = kasprintf(GFP_KERNEL, "%x.%s", io_res->start,
+ flash_np->name);
+ if (!fun->mtd.name) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
ret = nand_scan(&fun->mtd, 1);
if (ret)
- return ret;
-
- fun->mtd.name = fun->dev->bus_id;
+ goto err;
#ifdef CONFIG_MTD_PARTITIONS
ret = parse_mtd_partitions(&fun->mtd, part_types, &fun->parts, 0);
+
+#ifdef CONFIG_MTD_OF_PARTS
+ if (ret == 0)
+ ret = of_mtd_parse_partitions(fun->dev, &fun->mtd,
+ flash_np, &fun->parts);
+#endif
if (ret > 0)
- return add_mtd_partitions(&fun->mtd, fun->parts, ret);
+ ret = add_mtd_partitions(&fun->mtd, fun->parts, ret);
+ else
#endif
- return add_mtd_device(&fun->mtd);
+ ret = add_mtd_device(&fun->mtd);
+err:
+ of_node_put(flash_np);
+ return ret;
}
static int __devinit fun_probe(struct of_device *ofdev,
@@ -211,6 +231,12 @@ static int __devinit fun_probe(struct of_device *ofdev,
goto err2;
}
+ prop = of_get_property(ofdev->node, "chip-delay", NULL);
+ if (prop)
+ fun->chip_delay = *prop;
+ else
+ fun->chip_delay = 50;
+
fun->io_base = devm_ioremap_nocache(&ofdev->dev, io_res.start,
io_res.end - io_res.start + 1);
if (!fun->io_base) {
@@ -220,17 +246,8 @@ static int __devinit fun_probe(struct of_device *ofdev,
fun->dev = &ofdev->dev;
fun->last_ctrl = NAND_CLE;
- fun->wait_pattern = of_get_property(ofdev->node, "fsl,wait-pattern",
- NULL);
- fun->wait_write = of_get_property(ofdev->node, "fsl,wait-write", NULL);
-
- prop = of_get_property(ofdev->node, "chip-delay", NULL);
- if (prop)
- fun->chip_delay = *prop;
- else
- fun->chip_delay = 50;
- ret = fun_chip_init(fun);
+ ret = fun_chip_init(fun, ofdev->node, &io_res);
if (ret)
goto err2;
@@ -251,6 +268,7 @@ static int __devexit fun_remove(struct of_device *ofdev)
struct fsl_upm_nand *fun = dev_get_drvdata(&ofdev->dev);
nand_release(&fun->mtd);
+ kfree(fun->mtd.name);
if (fun->rnb_gpio >= 0)
gpio_free(fun->rnb_gpio);
diff --git a/drivers/mtd/nand/gpio.c b/drivers/mtd/nand/gpio.c
new file mode 100644
index 00000000000..8f902e75aa8
--- /dev/null
+++ b/drivers/mtd/nand/gpio.c
@@ -0,0 +1,375 @@
+/*
+ * drivers/mtd/nand/gpio.c
+ *
+ * Updated, and converted to generic GPIO based driver by Russell King.
+ *
+ * Written by Ben Dooks <ben@simtec.co.uk>
+ * Based on 2.4 version by Mark Whittaker
+ *
+ * © 2004 Simtec Electronics
+ *
+ * Device driver for NAND connected via GPIO
+ *
+ * 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/kernel.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/io.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/nand-gpio.h>
+
+struct gpiomtd {
+ void __iomem *io_sync;
+ struct mtd_info mtd_info;
+ struct nand_chip nand_chip;
+ struct gpio_nand_platdata plat;
+};
+
+#define gpio_nand_getpriv(x) container_of(x, struct gpiomtd, mtd_info)
+
+
+#ifdef CONFIG_ARM
+/* gpio_nand_dosync()
+ *
+ * Make sure the GPIO state changes occur in-order with writes to NAND
+ * memory region.
+ * Needed on PXA due to bus-reordering within the SoC itself (see section on
+ * I/O ordering in PXA manual (section 2.3, p35)
+ */
+static void gpio_nand_dosync(struct gpiomtd *gpiomtd)
+{
+ unsigned long tmp;
+
+ if (gpiomtd->io_sync) {
+ /*
+ * Linux memory barriers don't cater for what's required here.
+ * What's required is what's here - a read from a separate
+ * region with a dependency on that read.
+ */
+ tmp = readl(gpiomtd->io_sync);
+ asm volatile("mov %1, %0\n" : "=r" (tmp) : "r" (tmp));
+ }
+}
+#else
+static inline void gpio_nand_dosync(struct gpiomtd *gpiomtd) {}
+#endif
+
+static void gpio_nand_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
+{
+ struct gpiomtd *gpiomtd = gpio_nand_getpriv(mtd);
+
+ gpio_nand_dosync(gpiomtd);
+
+ if (ctrl & NAND_CTRL_CHANGE) {
+ gpio_set_value(gpiomtd->plat.gpio_nce, !(ctrl & NAND_NCE));
+ gpio_set_value(gpiomtd->plat.gpio_cle, !!(ctrl & NAND_CLE));
+ gpio_set_value(gpiomtd->plat.gpio_ale, !!(ctrl & NAND_ALE));
+ gpio_nand_dosync(gpiomtd);
+ }
+ if (cmd == NAND_CMD_NONE)
+ return;
+
+ writeb(cmd, gpiomtd->nand_chip.IO_ADDR_W);
+ gpio_nand_dosync(gpiomtd);
+}
+
+static void gpio_nand_writebuf(struct mtd_info *mtd, const u_char *buf, int len)
+{
+ struct nand_chip *this = mtd->priv;
+
+ writesb(this->IO_ADDR_W, buf, len);
+}
+
+static void gpio_nand_readbuf(struct mtd_info *mtd, u_char *buf, int len)
+{
+ struct nand_chip *this = mtd->priv;
+
+ readsb(this->IO_ADDR_R, buf, len);
+}
+
+static int gpio_nand_verifybuf(struct mtd_info *mtd, const u_char *buf, int len)
+{
+ struct nand_chip *this = mtd->priv;
+ unsigned char read, *p = (unsigned char *) buf;
+ int i, err = 0;
+
+ for (i = 0; i < len; i++) {
+ read = readb(this->IO_ADDR_R);
+ if (read != p[i]) {
+ pr_debug("%s: err at %d (read %04x vs %04x)\n",
+ __func__, i, read, p[i]);
+ err = -EFAULT;
+ }
+ }
+ return err;
+}
+
+static void gpio_nand_writebuf16(struct mtd_info *mtd, const u_char *buf,
+ int len)
+{
+ struct nand_chip *this = mtd->priv;
+
+ if (IS_ALIGNED((unsigned long)buf, 2)) {
+ writesw(this->IO_ADDR_W, buf, len>>1);
+ } else {
+ int i;
+ unsigned short *ptr = (unsigned short *)buf;
+
+ for (i = 0; i < len; i += 2, ptr++)
+ writew(*ptr, this->IO_ADDR_W);
+ }
+}
+
+static void gpio_nand_readbuf16(struct mtd_info *mtd, u_char *buf, int len)
+{
+ struct nand_chip *this = mtd->priv;
+
+ if (IS_ALIGNED((unsigned long)buf, 2)) {
+ readsw(this->IO_ADDR_R, buf, len>>1);
+ } else {
+ int i;
+ unsigned short *ptr = (unsigned short *)buf;
+
+ for (i = 0; i < len; i += 2, ptr++)
+ *ptr = readw(this->IO_ADDR_R);
+ }
+}
+
+static int gpio_nand_verifybuf16(struct mtd_info *mtd, const u_char *buf,
+ int len)
+{
+ struct nand_chip *this = mtd->priv;
+ unsigned short read, *p = (unsigned short *) buf;
+ int i, err = 0;
+ len >>= 1;
+
+ for (i = 0; i < len; i++) {
+ read = readw(this->IO_ADDR_R);
+ if (read != p[i]) {
+ pr_debug("%s: err at %d (read %04x vs %04x)\n",
+ __func__, i, read, p[i]);
+ err = -EFAULT;
+ }
+ }
+ return err;
+}
+
+
+static int gpio_nand_devready(struct mtd_info *mtd)
+{
+ struct gpiomtd *gpiomtd = gpio_nand_getpriv(mtd);
+ return gpio_get_value(gpiomtd->plat.gpio_rdy);
+}
+
+static int __devexit gpio_nand_remove(struct platform_device *dev)
+{
+ struct gpiomtd *gpiomtd = platform_get_drvdata(dev);
+ struct resource *res;
+
+ nand_release(&gpiomtd->mtd_info);
+
+ res = platform_get_resource(dev, IORESOURCE_MEM, 1);
+ iounmap(gpiomtd->io_sync);
+ if (res)
+ release_mem_region(res->start, res->end - res->start + 1);
+
+ res = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ iounmap(gpiomtd->nand_chip.IO_ADDR_R);
+ release_mem_region(res->start, res->end - res->start + 1);
+
+ if (gpio_is_valid(gpiomtd->plat.gpio_nwp))
+ gpio_set_value(gpiomtd->plat.gpio_nwp, 0);
+ gpio_set_value(gpiomtd->plat.gpio_nce, 1);
+
+ gpio_free(gpiomtd->plat.gpio_cle);
+ gpio_free(gpiomtd->plat.gpio_ale);
+ gpio_free(gpiomtd->plat.gpio_nce);
+ if (gpio_is_valid(gpiomtd->plat.gpio_nwp))
+ gpio_free(gpiomtd->plat.gpio_nwp);
+ gpio_free(gpiomtd->plat.gpio_rdy);
+
+ kfree(gpiomtd);
+
+ return 0;
+}
+
+static void __iomem *request_and_remap(struct resource *res, size_t size,
+ const char *name, int *err)
+{
+ void __iomem *ptr;
+
+ if (!request_mem_region(res->start, res->end - res->start + 1, name)) {
+ *err = -EBUSY;
+ return NULL;
+ }
+
+ ptr = ioremap(res->start, size);
+ if (!ptr) {
+ release_mem_region(res->start, res->end - res->start + 1);
+ *err = -ENOMEM;
+ }
+ return ptr;
+}
+
+static int __devinit gpio_nand_probe(struct platform_device *dev)
+{
+ struct gpiomtd *gpiomtd;
+ struct nand_chip *this;
+ struct resource *res0, *res1;
+ int ret;
+
+ if (!dev->dev.platform_data)
+ return -EINVAL;
+
+ res0 = platform_get_resource(dev, IORESOURCE_MEM, 0);
+ if (!res0)
+ return -EINVAL;
+
+ gpiomtd = kzalloc(sizeof(*gpiomtd), GFP_KERNEL);
+ if (gpiomtd == NULL) {
+ dev_err(&dev->dev, "failed to create NAND MTD\n");
+ return -ENOMEM;
+ }
+
+ this = &gpiomtd->nand_chip;
+ this->IO_ADDR_R = request_and_remap(res0, 2, "NAND", &ret);
+ if (!this->IO_ADDR_R) {
+ dev_err(&dev->dev, "unable to map NAND\n");
+ goto err_map;
+ }
+
+ res1 = platform_get_resource(dev, IORESOURCE_MEM, 1);
+ if (res1) {
+ gpiomtd->io_sync = request_and_remap(res1, 4, "NAND sync", &ret);
+ if (!gpiomtd->io_sync) {
+ dev_err(&dev->dev, "unable to map sync NAND\n");
+ goto err_sync;
+ }
+ }
+
+ memcpy(&gpiomtd->plat, dev->dev.platform_data, sizeof(gpiomtd->plat));
+
+ ret = gpio_request(gpiomtd->plat.gpio_nce, "NAND NCE");
+ if (ret)
+ goto err_nce;
+ gpio_direction_output(gpiomtd->plat.gpio_nce, 1);
+ if (gpio_is_valid(gpiomtd->plat.gpio_nwp)) {
+ ret = gpio_request(gpiomtd->plat.gpio_nwp, "NAND NWP");
+ if (ret)
+ goto err_nwp;
+ gpio_direction_output(gpiomtd->plat.gpio_nwp, 1);
+ }
+ ret = gpio_request(gpiomtd->plat.gpio_ale, "NAND ALE");
+ if (ret)
+ goto err_ale;
+ gpio_direction_output(gpiomtd->plat.gpio_ale, 0);
+ ret = gpio_request(gpiomtd->plat.gpio_cle, "NAND CLE");
+ if (ret)
+ goto err_cle;
+ gpio_direction_output(gpiomtd->plat.gpio_cle, 0);
+ ret = gpio_request(gpiomtd->plat.gpio_rdy, "NAND RDY");
+ if (ret)
+ goto err_rdy;
+ gpio_direction_input(gpiomtd->plat.gpio_rdy);
+
+
+ this->IO_ADDR_W = this->IO_ADDR_R;
+ this->ecc.mode = NAND_ECC_SOFT;
+ this->options = gpiomtd->plat.options;
+ this->chip_delay = gpiomtd->plat.chip_delay;
+
+ /* install our routines */
+ this->cmd_ctrl = gpio_nand_cmd_ctrl;
+ this->dev_ready = gpio_nand_devready;
+
+ if (this->options & NAND_BUSWIDTH_16) {
+ this->read_buf = gpio_nand_readbuf16;
+ this->write_buf = gpio_nand_writebuf16;
+ this->verify_buf = gpio_nand_verifybuf16;
+ } else {
+ this->read_buf = gpio_nand_readbuf;
+ this->write_buf = gpio_nand_writebuf;
+ this->verify_buf = gpio_nand_verifybuf;
+ }
+
+ /* set the mtd private data for the nand driver */
+ gpiomtd->mtd_info.priv = this;
+ gpiomtd->mtd_info.owner = THIS_MODULE;
+
+ if (nand_scan(&gpiomtd->mtd_info, 1)) {
+ dev_err(&dev->dev, "no nand chips found?\n");
+ ret = -ENXIO;
+ goto err_wp;
+ }
+
+ if (gpiomtd->plat.adjust_parts)
+ gpiomtd->plat.adjust_parts(&gpiomtd->plat,
+ gpiomtd->mtd_info.size);
+
+ add_mtd_partitions(&gpiomtd->mtd_info, gpiomtd->plat.parts,
+ gpiomtd->plat.num_parts);
+ platform_set_drvdata(dev, gpiomtd);
+
+ return 0;
+
+err_wp:
+ if (gpio_is_valid(gpiomtd->plat.gpio_nwp))
+ gpio_set_value(gpiomtd->plat.gpio_nwp, 0);
+ gpio_free(gpiomtd->plat.gpio_rdy);
+err_rdy:
+ gpio_free(gpiomtd->plat.gpio_cle);
+err_cle:
+ gpio_free(gpiomtd->plat.gpio_ale);
+err_ale:
+ if (gpio_is_valid(gpiomtd->plat.gpio_nwp))
+ gpio_free(gpiomtd->plat.gpio_nwp);
+err_nwp:
+ gpio_free(gpiomtd->plat.gpio_nce);
+err_nce:
+ iounmap(gpiomtd->io_sync);
+ if (res1)
+ release_mem_region(res1->start, res1->end - res1->start + 1);
+err_sync:
+ iounmap(gpiomtd->nand_chip.IO_ADDR_R);
+ release_mem_region(res0->start, res0->end - res0->start + 1);
+err_map:
+ kfree(gpiomtd);
+ return ret;
+}
+
+static struct platform_driver gpio_nand_driver = {
+ .probe = gpio_nand_probe,
+ .remove = gpio_nand_remove,
+ .driver = {
+ .name = "gpio-nand",
+ },
+};
+
+static int __init gpio_nand_init(void)
+{
+ printk(KERN_INFO "GPIO NAND driver, © 2004 Simtec Electronics\n");
+
+ return platform_driver_register(&gpio_nand_driver);
+}
+
+static void __exit gpio_nand_exit(void)
+{
+ platform_driver_unregister(&gpio_nand_driver);
+}
+
+module_init(gpio_nand_init);
+module_exit(gpio_nand_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
+MODULE_DESCRIPTION("GPIO NAND Driver");
diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
new file mode 100644
index 00000000000..21fd4f1c480
--- /dev/null
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -0,0 +1,1077 @@
+/*
+ * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright 2008 Sascha Hauer, kernel@pengutronix.de
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/partitions.h>
+#include <linux/interrupt.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+
+#include <asm/mach/flash.h>
+#include <mach/mxc_nand.h>
+
+#define DRIVER_NAME "mxc_nand"
+
+/* Addresses for NFC registers */
+#define NFC_BUF_SIZE 0xE00
+#define NFC_BUF_ADDR 0xE04
+#define NFC_FLASH_ADDR 0xE06
+#define NFC_FLASH_CMD 0xE08
+#define NFC_CONFIG 0xE0A
+#define NFC_ECC_STATUS_RESULT 0xE0C
+#define NFC_RSLTMAIN_AREA 0xE0E
+#define NFC_RSLTSPARE_AREA 0xE10
+#define NFC_WRPROT 0xE12
+#define NFC_UNLOCKSTART_BLKADDR 0xE14
+#define NFC_UNLOCKEND_BLKADDR 0xE16
+#define NFC_NF_WRPRST 0xE18
+#define NFC_CONFIG1 0xE1A
+#define NFC_CONFIG2 0xE1C
+
+/* Addresses for NFC RAM BUFFER Main area 0 */
+#define MAIN_AREA0 0x000
+#define MAIN_AREA1 0x200
+#define MAIN_AREA2 0x400
+#define MAIN_AREA3 0x600
+
+/* Addresses for NFC SPARE BUFFER Spare area 0 */
+#define SPARE_AREA0 0x800
+#define SPARE_AREA1 0x810
+#define SPARE_AREA2 0x820
+#define SPARE_AREA3 0x830
+
+/* Set INT to 0, FCMD to 1, rest to 0 in NFC_CONFIG2 Register
+ * for Command operation */
+#define NFC_CMD 0x1
+
+/* Set INT to 0, FADD to 1, rest to 0 in NFC_CONFIG2 Register
+ * for Address operation */
+#define NFC_ADDR 0x2
+
+/* Set INT to 0, FDI to 1, rest to 0 in NFC_CONFIG2 Register
+ * for Input operation */
+#define NFC_INPUT 0x4
+
+/* Set INT to 0, FDO to 001, rest to 0 in NFC_CONFIG2 Register
+ * for Data Output operation */
+#define NFC_OUTPUT 0x8
+
+/* Set INT to 0, FD0 to 010, rest to 0 in NFC_CONFIG2 Register
+ * for Read ID operation */
+#define NFC_ID 0x10
+
+/* Set INT to 0, FDO to 100, rest to 0 in NFC_CONFIG2 Register
+ * for Read Status operation */
+#define NFC_STATUS 0x20
+
+/* Set INT to 1, rest to 0 in NFC_CONFIG2 Register for Read
+ * Status operation */
+#define NFC_INT 0x8000
+
+#define NFC_SP_EN (1 << 2)
+#define NFC_ECC_EN (1 << 3)
+#define NFC_INT_MSK (1 << 4)
+#define NFC_BIG (1 << 5)
+#define NFC_RST (1 << 6)
+#define NFC_CE (1 << 7)
+#define NFC_ONE_CYCLE (1 << 8)
+
+struct mxc_nand_host {
+ struct mtd_info mtd;
+ struct nand_chip nand;
+ struct mtd_partition *parts;
+ struct device *dev;
+
+ void __iomem *regs;
+ int spare_only;
+ int status_request;
+ int pagesize_2k;
+ uint16_t col_addr;
+ struct clk *clk;
+ int clk_act;
+ int irq;
+
+ wait_queue_head_t irq_waitq;
+};
+
+/* Define delays in microsec for NAND device operations */
+#define TROP_US_DELAY 2000
+/* Macros to get byte and bit positions of ECC */
+#define COLPOS(x) ((x) >> 3)
+#define BITPOS(x) ((x) & 0xf)
+
+/* Define single bit Error positions in Main & Spare area */
+#define MAIN_SINGLEBIT_ERROR 0x4
+#define SPARE_SINGLEBIT_ERROR 0x1
+
+/* OOB placement block for use with hardware ecc generation */
+static struct nand_ecclayout nand_hw_eccoob_8 = {
+ .eccbytes = 5,
+ .eccpos = {6, 7, 8, 9, 10},
+ .oobfree = {{0, 5}, {11, 5}, }
+};
+
+static struct nand_ecclayout nand_hw_eccoob_16 = {
+ .eccbytes = 5,
+ .eccpos = {6, 7, 8, 9, 10},
+ .oobfree = {{0, 6}, {12, 4}, }
+};
+
+#ifdef CONFIG_MTD_PARTITIONS
+static const char *part_probes[] = { "RedBoot", "cmdlinepart", NULL };
+#endif
+
+static irqreturn_t mxc_nfc_irq(int irq, void *dev_id)
+{
+ struct mxc_nand_host *host = dev_id;
+
+ uint16_t tmp;
+
+ tmp = readw(host->regs + NFC_CONFIG1);
+ tmp |= NFC_INT_MSK; /* Disable interrupt */
+ writew(tmp, host->regs + NFC_CONFIG1);
+
+ wake_up(&host->irq_waitq);
+
+ return IRQ_HANDLED;
+}
+
+/* This function polls the NANDFC to wait for the basic operation to
+ * complete by checking the INT bit of config2 register.
+ */
+static void wait_op_done(struct mxc_nand_host *host, int max_retries,
+ uint16_t param, int useirq)
+{
+ uint32_t tmp;
+
+ if (useirq) {
+ if ((readw(host->regs + NFC_CONFIG2) & NFC_INT) == 0) {
+
+ tmp = readw(host->regs + NFC_CONFIG1);
+ tmp &= ~NFC_INT_MSK; /* Enable interrupt */
+ writew(tmp, host->regs + NFC_CONFIG1);
+
+ wait_event(host->irq_waitq,
+ readw(host->regs + NFC_CONFIG2) & NFC_INT);
+
+ tmp = readw(host->regs + NFC_CONFIG2);
+ tmp &= ~NFC_INT;
+ writew(tmp, host->regs + NFC_CONFIG2);
+ }
+ } else {
+ while (max_retries-- > 0) {
+ if (readw(host->regs + NFC_CONFIG2) & NFC_INT) {
+ tmp = readw(host->regs + NFC_CONFIG2);
+ tmp &= ~NFC_INT;
+ writew(tmp, host->regs + NFC_CONFIG2);
+ break;
+ }
+ udelay(1);
+ }
+ if (max_retries <= 0)
+ DEBUG(MTD_DEBUG_LEVEL0, "%s(%d): INT not set\n",
+ __func__, param);
+ }
+}
+
+/* This function issues the specified command to the NAND device and
+ * waits for completion. */
+static void send_cmd(struct mxc_nand_host *host, uint16_t cmd, int useirq)
+{
+ DEBUG(MTD_DEBUG_LEVEL3, "send_cmd(host, 0x%x, %d)\n", cmd, useirq);
+
+ writew(cmd, host->regs + NFC_FLASH_CMD);
+ writew(NFC_CMD, host->regs + NFC_CONFIG2);
+
+ /* Wait for operation to complete */
+ wait_op_done(host, TROP_US_DELAY, cmd, useirq);
+}
+
+/* This function sends an address (or partial address) to the
+ * NAND device. The address is used to select the source/destination for
+ * a NAND command. */
+static void send_addr(struct mxc_nand_host *host, uint16_t addr, int islast)
+{
+ DEBUG(MTD_DEBUG_LEVEL3, "send_addr(host, 0x%x %d)\n", addr, islast);
+
+ writew(addr, host->regs + NFC_FLASH_ADDR);
+ writew(NFC_ADDR, host->regs + NFC_CONFIG2);
+
+ /* Wait for operation to complete */
+ wait_op_done(host, TROP_US_DELAY, addr, islast);
+}
+
+/* This function requests the NANDFC to initate the transfer
+ * of data currently in the NANDFC RAM buffer to the NAND device. */
+static void send_prog_page(struct mxc_nand_host *host, uint8_t buf_id,
+ int spare_only)
+{
+ DEBUG(MTD_DEBUG_LEVEL3, "send_prog_page (%d)\n", spare_only);
+
+ /* NANDFC buffer 0 is used for page read/write */
+ writew(buf_id, host->regs + NFC_BUF_ADDR);
+
+ /* Configure spare or page+spare access */
+ if (!host->pagesize_2k) {
+ uint16_t config1 = readw(host->regs + NFC_CONFIG1);
+ if (spare_only)
+ config1 |= NFC_SP_EN;
+ else
+ config1 &= ~(NFC_SP_EN);
+ writew(config1, host->regs + NFC_CONFIG1);
+ }
+
+ writew(NFC_INPUT, host->regs + NFC_CONFIG2);
+
+ /* Wait for operation to complete */
+ wait_op_done(host, TROP_US_DELAY, spare_only, true);
+}
+
+/* Requests NANDFC to initated the transfer of data from the
+ * NAND device into in the NANDFC ram buffer. */
+static void send_read_page(struct mxc_nand_host *host, uint8_t buf_id,
+ int spare_only)
+{
+ DEBUG(MTD_DEBUG_LEVEL3, "send_read_page (%d)\n", spare_only);
+
+ /* NANDFC buffer 0 is used for page read/write */
+ writew(buf_id, host->regs + NFC_BUF_ADDR);
+
+ /* Configure spare or page+spare access */
+ if (!host->pagesize_2k) {
+ uint32_t config1 = readw(host->regs + NFC_CONFIG1);
+ if (spare_only)
+ config1 |= NFC_SP_EN;
+ else
+ config1 &= ~NFC_SP_EN;
+ writew(config1, host->regs + NFC_CONFIG1);
+ }
+
+ writew(NFC_OUTPUT, host->regs + NFC_CONFIG2);
+
+ /* Wait for operation to complete */
+ wait_op_done(host, TROP_US_DELAY, spare_only, true);
+}
+
+/* Request the NANDFC to perform a read of the NAND device ID. */
+static void send_read_id(struct mxc_nand_host *host)
+{
+ struct nand_chip *this = &host->nand;
+ uint16_t tmp;
+
+ /* NANDFC buffer 0 is used for device ID output */
+ writew(0x0, host->regs + NFC_BUF_ADDR);
+
+ /* Read ID into main buffer */
+ tmp = readw(host->regs + NFC_CONFIG1);
+ tmp &= ~NFC_SP_EN;
+ writew(tmp, host->regs + NFC_CONFIG1);
+
+ writew(NFC_ID, host->regs + NFC_CONFIG2);
+
+ /* Wait for operation to complete */
+ wait_op_done(host, TROP_US_DELAY, 0, true);
+
+ if (this->options & NAND_BUSWIDTH_16) {
+ void __iomem *main_buf = host->regs + MAIN_AREA0;
+ /* compress the ID info */
+ writeb(readb(main_buf + 2), main_buf + 1);
+ writeb(readb(main_buf + 4), main_buf + 2);
+ writeb(readb(main_buf + 6), main_buf + 3);
+ writeb(readb(main_buf + 8), main_buf + 4);
+ writeb(readb(main_buf + 10), main_buf + 5);
+ }
+}
+
+/* This function requests the NANDFC to perform a read of the
+ * NAND device status and returns the current status. */
+static uint16_t get_dev_status(struct mxc_nand_host *host)
+{
+ void __iomem *main_buf = host->regs + MAIN_AREA1;
+ uint32_t store;
+ uint16_t ret, tmp;
+ /* Issue status request to NAND device */
+
+ /* store the main area1 first word, later do recovery */
+ store = readl(main_buf);
+ /* NANDFC buffer 1 is used for device status to prevent
+ * corruption of read/write buffer on status requests. */
+ writew(1, host->regs + NFC_BUF_ADDR);
+
+ /* Read status into main buffer */
+ tmp = readw(host->regs + NFC_CONFIG1);
+ tmp &= ~NFC_SP_EN;
+ writew(tmp, host->regs + NFC_CONFIG1);
+
+ writew(NFC_STATUS, host->regs + NFC_CONFIG2);
+
+ /* Wait for operation to complete */
+ wait_op_done(host, TROP_US_DELAY, 0, true);
+
+ /* Status is placed in first word of main buffer */
+ /* get status, then recovery area 1 data */
+ ret = readw(main_buf);
+ writel(store, main_buf);
+
+ return ret;
+}
+
+/* This functions is used by upper layer to checks if device is ready */
+static int mxc_nand_dev_ready(struct mtd_info *mtd)
+{
+ /*
+ * NFC handles R/B internally. Therefore, this function
+ * always returns status as ready.
+ */
+ return 1;
+}
+
+static void mxc_nand_enable_hwecc(struct mtd_info *mtd, int mode)
+{
+ /*
+ * If HW ECC is enabled, we turn it on during init. There is
+ * no need to enable again here.
+ */
+}
+
+static int mxc_nand_correct_data(struct mtd_info *mtd, u_char *dat,
+ u_char *read_ecc, u_char *calc_ecc)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+ struct mxc_nand_host *host = nand_chip->priv;
+
+ /*
+ * 1-Bit errors are automatically corrected in HW. No need for
+ * additional correction. 2-Bit errors cannot be corrected by
+ * HW ECC, so we need to return failure
+ */
+ uint16_t ecc_status = readw(host->regs + NFC_ECC_STATUS_RESULT);
+
+ if (((ecc_status & 0x3) == 2) || ((ecc_status >> 2) == 2)) {
+ DEBUG(MTD_DEBUG_LEVEL0,
+ "MXC_NAND: HWECC uncorrectable 2-bit ECC error\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+static int mxc_nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat,
+ u_char *ecc_code)
+{
+ return 0;
+}
+
+static u_char mxc_nand_read_byte(struct mtd_info *mtd)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+ struct mxc_nand_host *host = nand_chip->priv;
+ uint8_t ret = 0;
+ uint16_t col, rd_word;
+ uint16_t __iomem *main_buf = host->regs + MAIN_AREA0;
+ uint16_t __iomem *spare_buf = host->regs + SPARE_AREA0;
+
+ /* Check for status request */
+ if (host->status_request)
+ return get_dev_status(host) & 0xFF;
+
+ /* Get column for 16-bit access */
+ col = host->col_addr >> 1;
+
+ /* If we are accessing the spare region */
+ if (host->spare_only)
+ rd_word = readw(&spare_buf[col]);
+ else
+ rd_word = readw(&main_buf[col]);
+
+ /* Pick upper/lower byte of word from RAM buffer */
+ if (host->col_addr & 0x1)
+ ret = (rd_word >> 8) & 0xFF;
+ else
+ ret = rd_word & 0xFF;
+
+ /* Update saved column address */
+ host->col_addr++;
+
+ return ret;
+}
+
+static uint16_t mxc_nand_read_word(struct mtd_info *mtd)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+ struct mxc_nand_host *host = nand_chip->priv;
+ uint16_t col, rd_word, ret;
+ uint16_t __iomem *p;
+
+ DEBUG(MTD_DEBUG_LEVEL3,
+ "mxc_nand_read_word(col = %d)\n", host->col_addr);
+
+ col = host->col_addr;
+ /* Adjust saved column address */
+ if (col < mtd->writesize && host->spare_only)
+ col += mtd->writesize;
+
+ if (col < mtd->writesize)
+ p = (host->regs + MAIN_AREA0) + (col >> 1);
+ else
+ p = (host->regs + SPARE_AREA0) + ((col - mtd->writesize) >> 1);
+
+ if (col & 1) {
+ rd_word = readw(p);
+ ret = (rd_word >> 8) & 0xff;
+ rd_word = readw(&p[1]);
+ ret |= (rd_word << 8) & 0xff00;
+
+ } else
+ ret = readw(p);
+
+ /* Update saved column address */
+ host->col_addr = col + 2;
+
+ return ret;
+}
+
+/* Write data of length len to buffer buf. The data to be
+ * written on NAND Flash is first copied to RAMbuffer. After the Data Input
+ * Operation by the NFC, the data is written to NAND Flash */
+static void mxc_nand_write_buf(struct mtd_info *mtd,
+ const u_char *buf, int len)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+ struct mxc_nand_host *host = nand_chip->priv;
+ int n, col, i = 0;
+
+ DEBUG(MTD_DEBUG_LEVEL3,
+ "mxc_nand_write_buf(col = %d, len = %d)\n", host->col_addr,
+ len);
+
+ col = host->col_addr;
+
+ /* Adjust saved column address */
+ if (col < mtd->writesize && host->spare_only)
+ col += mtd->writesize;
+
+ n = mtd->writesize + mtd->oobsize - col;
+ n = min(len, n);
+
+ DEBUG(MTD_DEBUG_LEVEL3,
+ "%s:%d: col = %d, n = %d\n", __func__, __LINE__, col, n);
+
+ while (n) {
+ void __iomem *p;
+
+ if (col < mtd->writesize)
+ p = host->regs + MAIN_AREA0 + (col & ~3);
+ else
+ p = host->regs + SPARE_AREA0 -
+ mtd->writesize + (col & ~3);
+
+ DEBUG(MTD_DEBUG_LEVEL3, "%s:%d: p = %p\n", __func__,
+ __LINE__, p);
+
+ if (((col | (int)&buf[i]) & 3) || n < 16) {
+ uint32_t data = 0;
+
+ if (col & 3 || n < 4)
+ data = readl(p);
+
+ switch (col & 3) {
+ case 0:
+ if (n) {
+ data = (data & 0xffffff00) |
+ (buf[i++] << 0);
+ n--;
+ col++;
+ }
+ case 1:
+ if (n) {
+ data = (data & 0xffff00ff) |
+ (buf[i++] << 8);
+ n--;
+ col++;
+ }
+ case 2:
+ if (n) {
+ data = (data & 0xff00ffff) |
+ (buf[i++] << 16);
+ n--;
+ col++;
+ }
+ case 3:
+ if (n) {
+ data = (data & 0x00ffffff) |
+ (buf[i++] << 24);
+ n--;
+ col++;
+ }
+ }
+
+ writel(data, p);
+ } else {
+ int m = mtd->writesize - col;
+
+ if (col >= mtd->writesize)
+ m += mtd->oobsize;
+
+ m = min(n, m) & ~3;
+
+ DEBUG(MTD_DEBUG_LEVEL3,
+ "%s:%d: n = %d, m = %d, i = %d, col = %d\n",
+ __func__, __LINE__, n, m, i, col);
+
+ memcpy(p, &buf[i], m);
+ col += m;
+ i += m;
+ n -= m;
+ }
+ }
+ /* Update saved column address */
+ host->col_addr = col;
+}
+
+/* Read the data buffer from the NAND Flash. To read the data from NAND
+ * Flash first the data output cycle is initiated by the NFC, which copies
+ * the data to RAMbuffer. This data of length len is then copied to buffer buf.
+ */
+static void mxc_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+ struct mxc_nand_host *host = nand_chip->priv;
+ int n, col, i = 0;
+
+ DEBUG(MTD_DEBUG_LEVEL3,
+ "mxc_nand_read_buf(col = %d, len = %d)\n", host->col_addr, len);
+
+ col = host->col_addr;
+
+ /* Adjust saved column address */
+ if (col < mtd->writesize && host->spare_only)
+ col += mtd->writesize;
+
+ n = mtd->writesize + mtd->oobsize - col;
+ n = min(len, n);
+
+ while (n) {
+ void __iomem *p;
+
+ if (col < mtd->writesize)
+ p = host->regs + MAIN_AREA0 + (col & ~3);
+ else
+ p = host->regs + SPARE_AREA0 -
+ mtd->writesize + (col & ~3);
+
+ if (((col | (int)&buf[i]) & 3) || n < 16) {
+ uint32_t data;
+
+ data = readl(p);
+ switch (col & 3) {
+ case 0:
+ if (n) {
+ buf[i++] = (uint8_t) (data);
+ n--;
+ col++;
+ }
+ case 1:
+ if (n) {
+ buf[i++] = (uint8_t) (data >> 8);
+ n--;
+ col++;
+ }
+ case 2:
+ if (n) {
+ buf[i++] = (uint8_t) (data >> 16);
+ n--;
+ col++;
+ }
+ case 3:
+ if (n) {
+ buf[i++] = (uint8_t) (data >> 24);
+ n--;
+ col++;
+ }
+ }
+ } else {
+ int m = mtd->writesize - col;
+
+ if (col >= mtd->writesize)
+ m += mtd->oobsize;
+
+ m = min(n, m) & ~3;
+ memcpy(&buf[i], p, m);
+ col += m;
+ i += m;
+ n -= m;
+ }
+ }
+ /* Update saved column address */
+ host->col_addr = col;
+
+}
+
+/* Used by the upper layer to verify the data in NAND Flash
+ * with the data in the buf. */
+static int mxc_nand_verify_buf(struct mtd_info *mtd,
+ const u_char *buf, int len)
+{
+ return -EFAULT;
+}
+
+/* This function is used by upper layer for select and
+ * deselect of the NAND chip */
+static void mxc_nand_select_chip(struct mtd_info *mtd, int chip)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+ struct mxc_nand_host *host = nand_chip->priv;
+
+#ifdef CONFIG_MTD_NAND_MXC_FORCE_CE
+ if (chip > 0) {
+ DEBUG(MTD_DEBUG_LEVEL0,
+ "ERROR: Illegal chip select (chip = %d)\n", chip);
+ return;
+ }
+
+ if (chip == -1) {
+ writew(readw(host->regs + NFC_CONFIG1) & ~NFC_CE,
+ host->regs + NFC_CONFIG1);
+ return;
+ }
+
+ writew(readw(host->regs + NFC_CONFIG1) | NFC_CE,
+ host->regs + NFC_CONFIG1);
+#endif
+
+ switch (chip) {
+ case -1:
+ /* Disable the NFC clock */
+ if (host->clk_act) {
+ clk_disable(host->clk);
+ host->clk_act = 0;
+ }
+ break;
+ case 0:
+ /* Enable the NFC clock */
+ if (!host->clk_act) {
+ clk_enable(host->clk);
+ host->clk_act = 1;
+ }
+ break;
+
+ default:
+ break;
+ }
+}
+
+/* Used by the upper layer to write command to NAND Flash for
+ * different operations to be carried out on NAND Flash */
+static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
+ int column, int page_addr)
+{
+ struct nand_chip *nand_chip = mtd->priv;
+ struct mxc_nand_host *host = nand_chip->priv;
+ int useirq = true;
+
+ DEBUG(MTD_DEBUG_LEVEL3,
+ "mxc_nand_command (cmd = 0x%x, col = 0x%x, page = 0x%x)\n",
+ command, column, page_addr);
+
+ /* Reset command state information */
+ host->status_request = false;
+
+ /* Command pre-processing step */
+ switch (command) {
+
+ case NAND_CMD_STATUS:
+ host->col_addr = 0;
+ host->status_request = true;
+ break;
+
+ case NAND_CMD_READ0:
+ host->col_addr = column;
+ host->spare_only = false;
+ useirq = false;
+ break;
+
+ case NAND_CMD_READOOB:
+ host->col_addr = column;
+ host->spare_only = true;
+ useirq = false;
+ if (host->pagesize_2k)
+ command = NAND_CMD_READ0; /* only READ0 is valid */
+ break;
+
+ case NAND_CMD_SEQIN:
+ if (column >= mtd->writesize) {
+ /*
+ * FIXME: before send SEQIN command for write OOB,
+ * We must read one page out.
+ * For K9F1GXX has no READ1 command to set current HW
+ * pointer to spare area, we must write the whole page
+ * including OOB together.
+ */
+ if (host->pagesize_2k)
+ /* call ourself to read a page */
+ mxc_nand_command(mtd, NAND_CMD_READ0, 0,
+ page_addr);
+
+ host->col_addr = column - mtd->writesize;
+ host->spare_only = true;
+
+ /* Set program pointer to spare region */
+ if (!host->pagesize_2k)
+ send_cmd(host, NAND_CMD_READOOB, false);
+ } else {
+ host->spare_only = false;
+ host->col_addr = column;
+
+ /* Set program pointer to page start */
+ if (!host->pagesize_2k)
+ send_cmd(host, NAND_CMD_READ0, false);
+ }
+ useirq = false;
+ break;
+
+ case NAND_CMD_PAGEPROG:
+ send_prog_page(host, 0, host->spare_only);
+
+ if (host->pagesize_2k) {
+ /* data in 4 areas datas */
+ send_prog_page(host, 1, host->spare_only);
+ send_prog_page(host, 2, host->spare_only);
+ send_prog_page(host, 3, host->spare_only);
+ }
+
+ break;
+
+ case NAND_CMD_ERASE1:
+ useirq = false;
+ break;
+ }
+
+ /* Write out the command to the device. */
+ send_cmd(host, command, useirq);
+
+ /* Write out column address, if necessary */
+ if (column != -1) {
+ /*
+ * MXC NANDFC can only perform full page+spare or
+ * spare-only read/write. When the upper layers
+ * layers perform a read/write buf operation,
+ * we will used the saved column adress to index into
+ * the full page.
+ */
+ send_addr(host, 0, page_addr == -1);
+ if (host->pagesize_2k)
+ /* another col addr cycle for 2k page */
+ send_addr(host, 0, false);
+ }
+
+ /* Write out page address, if necessary */
+ if (page_addr != -1) {
+ /* paddr_0 - p_addr_7 */
+ send_addr(host, (page_addr & 0xff), false);
+
+ if (host->pagesize_2k) {
+ send_addr(host, (page_addr >> 8) & 0xFF, false);
+ if (mtd->size >= 0x40000000)
+ send_addr(host, (page_addr >> 16) & 0xff, true);
+ } else {
+ /* One more address cycle for higher density devices */
+ if (mtd->size >= 0x4000000) {
+ /* 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);
+ }
+ }
+
+ /* Command post-processing step */
+ switch (command) {
+
+ case NAND_CMD_RESET:
+ break;
+
+ case NAND_CMD_READOOB:
+ case NAND_CMD_READ0:
+ if (host->pagesize_2k) {
+ /* send read confirm command */
+ send_cmd(host, NAND_CMD_READSTART, true);
+ /* read for each AREA */
+ send_read_page(host, 0, host->spare_only);
+ send_read_page(host, 1, host->spare_only);
+ send_read_page(host, 2, host->spare_only);
+ send_read_page(host, 3, host->spare_only);
+ } else
+ send_read_page(host, 0, host->spare_only);
+ break;
+
+ case NAND_CMD_READID:
+ send_read_id(host);
+ break;
+
+ case NAND_CMD_PAGEPROG:
+ break;
+
+ case NAND_CMD_STATUS:
+ break;
+
+ case NAND_CMD_ERASE2:
+ break;
+ }
+}
+
+static int __init mxcnd_probe(struct platform_device *pdev)
+{
+ struct nand_chip *this;
+ struct mtd_info *mtd;
+ struct mxc_nand_platform_data *pdata = pdev->dev.platform_data;
+ struct mxc_nand_host *host;
+ struct resource *res;
+ uint16_t tmp;
+ int err = 0, nr_parts = 0;
+
+ /* Allocate memory for MTD device structure and private data */
+ host = kzalloc(sizeof(struct mxc_nand_host), GFP_KERNEL);
+ if (!host)
+ return -ENOMEM;
+
+ host->dev = &pdev->dev;
+ /* structures must be linked */
+ this = &host->nand;
+ mtd = &host->mtd;
+ mtd->priv = this;
+ mtd->owner = THIS_MODULE;
+
+ /* 50 us command delay time */
+ this->chip_delay = 5;
+
+ this->priv = host;
+ this->dev_ready = mxc_nand_dev_ready;
+ this->cmdfunc = mxc_nand_command;
+ this->select_chip = mxc_nand_select_chip;
+ this->read_byte = mxc_nand_read_byte;
+ this->read_word = mxc_nand_read_word;
+ this->write_buf = mxc_nand_write_buf;
+ this->read_buf = mxc_nand_read_buf;
+ this->verify_buf = mxc_nand_verify_buf;
+
+ host->clk = clk_get(&pdev->dev, "nfc_clk");
+ if (IS_ERR(host->clk))
+ goto eclk;
+
+ clk_enable(host->clk);
+ host->clk_act = 1;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ err = -ENODEV;
+ goto eres;
+ }
+
+ host->regs = ioremap(res->start, res->end - res->start + 1);
+ if (!host->regs) {
+ err = -EIO;
+ goto eres;
+ }
+
+ tmp = readw(host->regs + NFC_CONFIG1);
+ tmp |= NFC_INT_MSK;
+ writew(tmp, host->regs + NFC_CONFIG1);
+
+ init_waitqueue_head(&host->irq_waitq);
+
+ host->irq = platform_get_irq(pdev, 0);
+
+ err = request_irq(host->irq, mxc_nfc_irq, 0, "mxc_nd", host);
+ if (err)
+ goto eirq;
+
+ if (pdata->hw_ecc) {
+ this->ecc.calculate = mxc_nand_calculate_ecc;
+ this->ecc.hwctl = mxc_nand_enable_hwecc;
+ this->ecc.correct = mxc_nand_correct_data;
+ 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);
+ } else {
+ this->ecc.size = 512;
+ this->ecc.bytes = 3;
+ this->ecc.layout = &nand_hw_eccoob_8;
+ this->ecc.mode = NAND_ECC_SOFT;
+ tmp = readw(host->regs + NFC_CONFIG1);
+ tmp &= ~NFC_ECC_EN;
+ writew(tmp, host->regs + NFC_CONFIG1);
+ }
+
+ /* Reset NAND */
+ this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
+
+ /* preset operation */
+ /* Unlock the internal RAM Buffer */
+ writew(0x2, host->regs + NFC_CONFIG);
+
+ /* Blocks to be unlocked */
+ writew(0x0, host->regs + NFC_UNLOCKSTART_BLKADDR);
+ writew(0x4000, host->regs + NFC_UNLOCKEND_BLKADDR);
+
+ /* Unlock Block Command for given address range */
+ writew(0x4, host->regs + NFC_WRPROT);
+
+ /* NAND bus width determines access funtions used by upper layer */
+ if (pdata->width == 2) {
+ this->options |= NAND_BUSWIDTH_16;
+ this->ecc.layout = &nand_hw_eccoob_16;
+ }
+
+ host->pagesize_2k = 0;
+
+ /* 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");
+ err = -ENXIO;
+ goto escan;
+ }
+
+ /* Register the partitions */
+#ifdef CONFIG_MTD_PARTITIONS
+ nr_parts =
+ parse_mtd_partitions(mtd, part_probes, &host->parts, 0);
+ if (nr_parts > 0)
+ add_mtd_partitions(mtd, host->parts, nr_parts);
+ else
+#endif
+ {
+ pr_info("Registering %s as whole device\n", mtd->name);
+ add_mtd_device(mtd);
+ }
+
+ platform_set_drvdata(pdev, host);
+
+ return 0;
+
+escan:
+ free_irq(host->irq, NULL);
+eirq:
+ iounmap(host->regs);
+eres:
+ clk_put(host->clk);
+eclk:
+ kfree(host);
+
+ return err;
+}
+
+static int __devexit mxcnd_remove(struct platform_device *pdev)
+{
+ struct mxc_nand_host *host = platform_get_drvdata(pdev);
+
+ clk_put(host->clk);
+
+ platform_set_drvdata(pdev, NULL);
+
+ nand_release(&host->mtd);
+ free_irq(host->irq, NULL);
+ iounmap(host->regs);
+ kfree(host);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int mxcnd_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct mtd_info *info = platform_get_drvdata(pdev);
+ int ret = 0;
+
+ DEBUG(MTD_DEBUG_LEVEL0, "MXC_ND : NAND suspend\n");
+ if (info)
+ ret = info->suspend(info);
+
+ /* Disable the NFC clock */
+ clk_disable(nfc_clk); /* FIXME */
+
+ return ret;
+}
+
+static int mxcnd_resume(struct platform_device *pdev)
+{
+ struct mtd_info *info = platform_get_drvdata(pdev);
+ int ret = 0;
+
+ DEBUG(MTD_DEBUG_LEVEL0, "MXC_ND : NAND resume\n");
+ /* Enable the NFC clock */
+ clk_enable(nfc_clk); /* FIXME */
+
+ if (info)
+ info->resume(info);
+
+ return ret;
+}
+
+#else
+# define mxcnd_suspend NULL
+# define mxcnd_resume NULL
+#endif /* CONFIG_PM */
+
+static struct platform_driver mxcnd_driver = {
+ .driver = {
+ .name = DRIVER_NAME,
+ },
+ .remove = __exit_p(mxcnd_remove),
+ .suspend = mxcnd_suspend,
+ .resume = mxcnd_resume,
+};
+
+static int __init mxc_nd_init(void)
+{
+ /* Register the device driver structure. */
+ pr_info("MXC MTD nand Driver\n");
+ if (platform_driver_probe(&mxcnd_driver, mxcnd_probe) != 0) {
+ printk(KERN_ERR "Driver register failed for mxcnd_driver\n");
+ return -ENODEV;
+ }
+ return 0;
+}
+
+static void __exit mxc_nd_cleanup(void)
+{
+ /* Unregister the device structure */
+ platform_driver_unregister(&mxcnd_driver);
+}
+
+module_init(mxc_nd_init);
+module_exit(mxc_nd_cleanup);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("MXC NAND MTD driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index d1129bae6c2..0a9c9cd33f9 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -801,9 +801,9 @@ static int nand_read_page_swecc(struct mtd_info *mtd, struct nand_chip *chip,
* nand_read_subpage - [REPLACABLE] software ecc based sub-page read function
* @mtd: mtd info structure
* @chip: nand chip info structure
- * @dataofs offset of requested data within the page
- * @readlen data length
- * @buf: buffer to store read data
+ * @data_offs: offset of requested data within the page
+ * @readlen: data length
+ * @bufpoi: buffer to store read data
*/
static int nand_read_subpage(struct mtd_info *mtd, struct nand_chip *chip, uint32_t data_offs, uint32_t readlen, uint8_t *bufpoi)
{
@@ -2042,7 +2042,7 @@ int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr,
return -EINVAL;
}
- instr->fail_addr = 0xffffffff;
+ instr->fail_addr = MTD_FAIL_ADDR_UNKNOWN;
/* Grab the lock and see if the device is available */
nand_get_device(chip, mtd, FL_ERASING);
@@ -2318,6 +2318,12 @@ static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
/* Select the device */
chip->select_chip(mtd, 0);
+ /*
+ * Reset the chip, required by some chips (e.g. Micron MT29FxGxxxxx)
+ * after power-up
+ */
+ chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
+
/* Send the command for reading device ID */
chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);
@@ -2488,6 +2494,8 @@ int nand_scan_ident(struct mtd_info *mtd, int maxchips)
/* Check for a chip array */
for (i = 1; i < maxchips; i++) {
chip->select_chip(mtd, i);
+ /* See comment in nand_get_flash_type for reset */
+ chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
/* Send the command for reading device ID */
chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);
/* Read manufacturer and device IDs */
diff --git a/drivers/mtd/nand/nand_ecc.c b/drivers/mtd/nand/nand_ecc.c
index 918a806a847..868147acce2 100644
--- a/drivers/mtd/nand/nand_ecc.c
+++ b/drivers/mtd/nand/nand_ecc.c
@@ -1,13 +1,18 @@
/*
- * This file contains an ECC algorithm from Toshiba that detects and
- * corrects 1 bit errors in a 256 byte block of data.
+ * This file contains an ECC algorithm that detects and corrects 1 bit
+ * errors in a 256 byte block of data.
*
* drivers/mtd/nand/nand_ecc.c
*
- * Copyright (C) 2000-2004 Steven J. Hill (sjhill@realitydiluted.com)
- * Toshiba America Electronics Components, Inc.
+ * Copyright © 2008 Koninklijke Philips Electronics NV.
+ * Author: Frans Meulenbroeks
*
- * Copyright (C) 2006 Thomas Gleixner <tglx@linutronix.de>
+ * Completely replaces the previous ECC implementation which was written by:
+ * Steven J. Hill (sjhill@realitydiluted.com)
+ * Thomas Gleixner (tglx@linutronix.de)
+ *
+ * Information on how this algorithm works and how it was developed
+ * can be found in Documentation/mtd/nand_ecc.txt
*
* This file is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
@@ -23,174 +28,475 @@
* with this file; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*
- * As a special exception, if other files instantiate templates or use
- * macros or inline functions from these files, or you compile these
- * files and link them with other works to produce a work based on these
- * files, these files do not by themselves cause the resulting work to be
- * covered by the GNU General Public License. However the source code for
- * these files must still be made available in accordance with section (3)
- * of the GNU General Public License.
- *
- * This exception does not invalidate any other reasons why a work based on
- * this file might be covered by the GNU General Public License.
*/
+/*
+ * The STANDALONE macro is useful when running the code outside the kernel
+ * e.g. when running the code in a testbed or a benchmark program.
+ * When STANDALONE is used, the module related macros are commented out
+ * as well as the linux include files.
+ * Instead a private definition of mtd_info is given to satisfy the compiler
+ * (the code does not use mtd_info, so the code does not care)
+ */
+#ifndef STANDALONE
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
#include <linux/mtd/nand_ecc.h>
+#include <asm/byteorder.h>
+#else
+#include <stdint.h>
+struct mtd_info;
+#define EXPORT_SYMBOL(x) /* x */
+
+#define MODULE_LICENSE(x) /* x */
+#define MODULE_AUTHOR(x) /* x */
+#define MODULE_DESCRIPTION(x) /* x */
+
+#define printk printf
+#define KERN_ERR ""
+#endif
+
+/*
+ * invparity is a 256 byte table that contains the odd parity
+ * for each byte. So if the number of bits in a byte is even,
+ * the array element is 1, and when the number of bits is odd
+ * the array eleemnt is 0.
+ */
+static const char invparity[256] = {
+ 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
+ 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
+ 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
+ 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
+ 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
+ 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
+ 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
+ 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
+ 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
+ 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
+ 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
+ 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
+ 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1,
+ 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
+ 0, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0,
+ 1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1
+};
+
+/*
+ * bitsperbyte contains the number of bits per byte
+ * this is only used for testing and repairing parity
+ * (a precalculated value slightly improves performance)
+ */
+static const char bitsperbyte[256] = {
+ 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4,
+ 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
+ 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
+ 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
+ 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
+ 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
+ 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
+ 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
+ 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
+ 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
+ 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
+ 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
+ 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
+ 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
+ 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
+ 4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8,
+};
/*
- * Pre-calculated 256-way 1 byte column parity
+ * addressbits is a lookup table to filter out the bits from the xor-ed
+ * ecc data that identify the faulty location.
+ * this is only used for repairing parity
+ * see the comments in nand_correct_data for more details
*/
-static const u_char nand_ecc_precalc_table[] = {
- 0x00, 0x55, 0x56, 0x03, 0x59, 0x0c, 0x0f, 0x5a, 0x5a, 0x0f, 0x0c, 0x59, 0x03, 0x56, 0x55, 0x00,
- 0x65, 0x30, 0x33, 0x66, 0x3c, 0x69, 0x6a, 0x3f, 0x3f, 0x6a, 0x69, 0x3c, 0x66, 0x33, 0x30, 0x65,
- 0x66, 0x33, 0x30, 0x65, 0x3f, 0x6a, 0x69, 0x3c, 0x3c, 0x69, 0x6a, 0x3f, 0x65, 0x30, 0x33, 0x66,
- 0x03, 0x56, 0x55, 0x00, 0x5a, 0x0f, 0x0c, 0x59, 0x59, 0x0c, 0x0f, 0x5a, 0x00, 0x55, 0x56, 0x03,
- 0x69, 0x3c, 0x3f, 0x6a, 0x30, 0x65, 0x66, 0x33, 0x33, 0x66, 0x65, 0x30, 0x6a, 0x3f, 0x3c, 0x69,
- 0x0c, 0x59, 0x5a, 0x0f, 0x55, 0x00, 0x03, 0x56, 0x56, 0x03, 0x00, 0x55, 0x0f, 0x5a, 0x59, 0x0c,
- 0x0f, 0x5a, 0x59, 0x0c, 0x56, 0x03, 0x00, 0x55, 0x55, 0x00, 0x03, 0x56, 0x0c, 0x59, 0x5a, 0x0f,
- 0x6a, 0x3f, 0x3c, 0x69, 0x33, 0x66, 0x65, 0x30, 0x30, 0x65, 0x66, 0x33, 0x69, 0x3c, 0x3f, 0x6a,
- 0x6a, 0x3f, 0x3c, 0x69, 0x33, 0x66, 0x65, 0x30, 0x30, 0x65, 0x66, 0x33, 0x69, 0x3c, 0x3f, 0x6a,
- 0x0f, 0x5a, 0x59, 0x0c, 0x56, 0x03, 0x00, 0x55, 0x55, 0x00, 0x03, 0x56, 0x0c, 0x59, 0x5a, 0x0f,
- 0x0c, 0x59, 0x5a, 0x0f, 0x55, 0x00, 0x03, 0x56, 0x56, 0x03, 0x00, 0x55, 0x0f, 0x5a, 0x59, 0x0c,
- 0x69, 0x3c, 0x3f, 0x6a, 0x30, 0x65, 0x66, 0x33, 0x33, 0x66, 0x65, 0x30, 0x6a, 0x3f, 0x3c, 0x69,
- 0x03, 0x56, 0x55, 0x00, 0x5a, 0x0f, 0x0c, 0x59, 0x59, 0x0c, 0x0f, 0x5a, 0x00, 0x55, 0x56, 0x03,
- 0x66, 0x33, 0x30, 0x65, 0x3f, 0x6a, 0x69, 0x3c, 0x3c, 0x69, 0x6a, 0x3f, 0x65, 0x30, 0x33, 0x66,
- 0x65, 0x30, 0x33, 0x66, 0x3c, 0x69, 0x6a, 0x3f, 0x3f, 0x6a, 0x69, 0x3c, 0x66, 0x33, 0x30, 0x65,
- 0x00, 0x55, 0x56, 0x03, 0x59, 0x0c, 0x0f, 0x5a, 0x5a, 0x0f, 0x0c, 0x59, 0x03, 0x56, 0x55, 0x00
+static const char addressbits[256] = {
+ 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x01,
+ 0x02, 0x02, 0x03, 0x03, 0x02, 0x02, 0x03, 0x03,
+ 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x01,
+ 0x02, 0x02, 0x03, 0x03, 0x02, 0x02, 0x03, 0x03,
+ 0x04, 0x04, 0x05, 0x05, 0x04, 0x04, 0x05, 0x05,
+ 0x06, 0x06, 0x07, 0x07, 0x06, 0x06, 0x07, 0x07,
+ 0x04, 0x04, 0x05, 0x05, 0x04, 0x04, 0x05, 0x05,
+ 0x06, 0x06, 0x07, 0x07, 0x06, 0x06, 0x07, 0x07,
+ 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x01,
+ 0x02, 0x02, 0x03, 0x03, 0x02, 0x02, 0x03, 0x03,
+ 0x00, 0x00, 0x01, 0x01, 0x00, 0x00, 0x01, 0x01,
+ 0x02, 0x02, 0x03, 0x03, 0x02, 0x02, 0x03, 0x03,
+ 0x04, 0x04, 0x05, 0x05, 0x04, 0x04, 0x05, 0x05,
+ 0x06, 0x06, 0x07, 0x07, 0x06, 0x06, 0x07, 0x07,
+ 0x04, 0x04, 0x05, 0x05, 0x04, 0x04, 0x05, 0x05,
+ 0x06, 0x06, 0x07, 0x07, 0x06, 0x06, 0x07, 0x07,
+ 0x08, 0x08, 0x09, 0x09, 0x08, 0x08, 0x09, 0x09,
+ 0x0a, 0x0a, 0x0b, 0x0b, 0x0a, 0x0a, 0x0b, 0x0b,
+ 0x08, 0x08, 0x09, 0x09, 0x08, 0x08, 0x09, 0x09,
+ 0x0a, 0x0a, 0x0b, 0x0b, 0x0a, 0x0a, 0x0b, 0x0b,
+ 0x0c, 0x0c, 0x0d, 0x0d, 0x0c, 0x0c, 0x0d, 0x0d,
+ 0x0e, 0x0e, 0x0f, 0x0f, 0x0e, 0x0e, 0x0f, 0x0f,
+ 0x0c, 0x0c, 0x0d, 0x0d, 0x0c, 0x0c, 0x0d, 0x0d,
+ 0x0e, 0x0e, 0x0f, 0x0f, 0x0e, 0x0e, 0x0f, 0x0f,
+ 0x08, 0x08, 0x09, 0x09, 0x08, 0x08, 0x09, 0x09,
+ 0x0a, 0x0a, 0x0b, 0x0b, 0x0a, 0x0a, 0x0b, 0x0b,
+ 0x08, 0x08, 0x09, 0x09, 0x08, 0x08, 0x09, 0x09,
+ 0x0a, 0x0a, 0x0b, 0x0b, 0x0a, 0x0a, 0x0b, 0x0b,
+ 0x0c, 0x0c, 0x0d, 0x0d, 0x0c, 0x0c, 0x0d, 0x0d,
+ 0x0e, 0x0e, 0x0f, 0x0f, 0x0e, 0x0e, 0x0f, 0x0f,
+ 0x0c, 0x0c, 0x0d, 0x0d, 0x0c, 0x0c, 0x0d, 0x0d,
+ 0x0e, 0x0e, 0x0f, 0x0f, 0x0e, 0x0e, 0x0f, 0x0f
};
/**
- * nand_calculate_ecc - [NAND Interface] Calculate 3-byte ECC for 256-byte block
+ * nand_calculate_ecc - [NAND Interface] Calculate 3-byte ECC for 256/512-byte
+ * block
* @mtd: MTD block structure
- * @dat: raw data
- * @ecc_code: buffer for ECC
+ * @buf: input buffer with raw data
+ * @code: output buffer with ECC
*/
-int nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat,
- u_char *ecc_code)
+int nand_calculate_ecc(struct mtd_info *mtd, const unsigned char *buf,
+ unsigned char *code)
{
- uint8_t idx, reg1, reg2, reg3, tmp1, tmp2;
int i;
+ const uint32_t *bp = (uint32_t *)buf;
+ /* 256 or 512 bytes/ecc */
+ const uint32_t eccsize_mult =
+ (((struct nand_chip *)mtd->priv)->ecc.size) >> 8;
+ uint32_t cur; /* current value in buffer */
+ /* rp0..rp15..rp17 are the various accumulated parities (per byte) */
+ uint32_t rp0, rp1, rp2, rp3, rp4, rp5, rp6, rp7;
+ uint32_t rp8, rp9, rp10, rp11, rp12, rp13, rp14, rp15, rp16;
+ uint32_t uninitialized_var(rp17); /* to make compiler happy */
+ uint32_t par; /* the cumulative parity for all data */
+ uint32_t tmppar; /* the cumulative parity for this iteration;
+ for rp12, rp14 and rp16 at the end of the
+ loop */
+
+ par = 0;
+ rp4 = 0;
+ rp6 = 0;
+ rp8 = 0;
+ rp10 = 0;
+ rp12 = 0;
+ rp14 = 0;
+ rp16 = 0;
+
+ /*
+ * The loop is unrolled a number of times;
+ * This avoids if statements to decide on which rp value to update
+ * Also we process the data by longwords.
+ * Note: passing unaligned data might give a performance penalty.
+ * It is assumed that the buffers are aligned.
+ * tmppar is the cumulative sum of this iteration.
+ * needed for calculating rp12, rp14, rp16 and par
+ * also used as a performance improvement for rp6, rp8 and rp10
+ */
+ for (i = 0; i < eccsize_mult << 2; i++) {
+ cur = *bp++;
+ tmppar = cur;
+ rp4 ^= cur;
+ cur = *bp++;
+ tmppar ^= cur;
+ rp6 ^= tmppar;
+ cur = *bp++;
+ tmppar ^= cur;
+ rp4 ^= cur;
+ cur = *bp++;
+ tmppar ^= cur;
+ rp8 ^= tmppar;
- /* Initialize variables */
- reg1 = reg2 = reg3 = 0;
+ cur = *bp++;
+ tmppar ^= cur;
+ rp4 ^= cur;
+ rp6 ^= cur;
+ cur = *bp++;
+ tmppar ^= cur;
+ rp6 ^= cur;
+ cur = *bp++;
+ tmppar ^= cur;
+ rp4 ^= cur;
+ cur = *bp++;
+ tmppar ^= cur;
+ rp10 ^= tmppar;
- /* Build up column parity */
- for(i = 0; i < 256; i++) {
- /* Get CP0 - CP5 from table */
- idx = nand_ecc_precalc_table[*dat++];
- reg1 ^= (idx & 0x3f);
+ cur = *bp++;
+ tmppar ^= cur;
+ rp4 ^= cur;
+ rp6 ^= cur;
+ rp8 ^= cur;
+ cur = *bp++;
+ tmppar ^= cur;
+ rp6 ^= cur;
+ rp8 ^= cur;
+ cur = *bp++;
+ tmppar ^= cur;
+ rp4 ^= cur;
+ rp8 ^= cur;
+ cur = *bp++;
+ tmppar ^= cur;
+ rp8 ^= cur;
- /* All bit XOR = 1 ? */
- if (idx & 0x40) {
- reg3 ^= (uint8_t) i;
- reg2 ^= ~((uint8_t) i);
- }
+ cur = *bp++;
+ tmppar ^= cur;
+ rp4 ^= cur;
+ rp6 ^= cur;
+ cur = *bp++;
+ tmppar ^= cur;
+ rp6 ^= cur;
+ cur = *bp++;
+ tmppar ^= cur;
+ rp4 ^= cur;
+ cur = *bp++;
+ tmppar ^= cur;
+
+ par ^= tmppar;
+ if ((i & 0x1) == 0)
+ rp12 ^= tmppar;
+ if ((i & 0x2) == 0)
+ rp14 ^= tmppar;
+ if (eccsize_mult == 2 && (i & 0x4) == 0)
+ rp16 ^= tmppar;
}
- /* Create non-inverted ECC code from line parity */
- tmp1 = (reg3 & 0x80) >> 0; /* B7 -> B7 */
- tmp1 |= (reg2 & 0x80) >> 1; /* B7 -> B6 */
- tmp1 |= (reg3 & 0x40) >> 1; /* B6 -> B5 */
- tmp1 |= (reg2 & 0x40) >> 2; /* B6 -> B4 */
- tmp1 |= (reg3 & 0x20) >> 2; /* B5 -> B3 */
- tmp1 |= (reg2 & 0x20) >> 3; /* B5 -> B2 */
- tmp1 |= (reg3 & 0x10) >> 3; /* B4 -> B1 */
- tmp1 |= (reg2 & 0x10) >> 4; /* B4 -> B0 */
-
- tmp2 = (reg3 & 0x08) << 4; /* B3 -> B7 */
- tmp2 |= (reg2 & 0x08) << 3; /* B3 -> B6 */
- tmp2 |= (reg3 & 0x04) << 3; /* B2 -> B5 */
- tmp2 |= (reg2 & 0x04) << 2; /* B2 -> B4 */
- tmp2 |= (reg3 & 0x02) << 2; /* B1 -> B3 */
- tmp2 |= (reg2 & 0x02) << 1; /* B1 -> B2 */
- tmp2 |= (reg3 & 0x01) << 1; /* B0 -> B1 */
- tmp2 |= (reg2 & 0x01) << 0; /* B7 -> B0 */
-
- /* Calculate final ECC code */
-#ifdef CONFIG_MTD_NAND_ECC_SMC
- ecc_code[0] = ~tmp2;
- ecc_code[1] = ~tmp1;
+ /*
+ * handle the fact that we use longword operations
+ * we'll bring rp4..rp14..rp16 back to single byte entities by
+ * shifting and xoring first fold the upper and lower 16 bits,
+ * then the upper and lower 8 bits.
+ */
+ rp4 ^= (rp4 >> 16);
+ rp4 ^= (rp4 >> 8);
+ rp4 &= 0xff;
+ rp6 ^= (rp6 >> 16);
+ rp6 ^= (rp6 >> 8);
+ rp6 &= 0xff;
+ rp8 ^= (rp8 >> 16);
+ rp8 ^= (rp8 >> 8);
+ rp8 &= 0xff;
+ rp10 ^= (rp10 >> 16);
+ rp10 ^= (rp10 >> 8);
+ rp10 &= 0xff;
+ rp12 ^= (rp12 >> 16);
+ rp12 ^= (rp12 >> 8);
+ rp12 &= 0xff;
+ rp14 ^= (rp14 >> 16);
+ rp14 ^= (rp14 >> 8);
+ rp14 &= 0xff;
+ if (eccsize_mult == 2) {
+ rp16 ^= (rp16 >> 16);
+ rp16 ^= (rp16 >> 8);
+ rp16 &= 0xff;
+ }
+
+ /*
+ * we also need to calculate the row parity for rp0..rp3
+ * This is present in par, because par is now
+ * rp3 rp3 rp2 rp2 in little endian and
+ * rp2 rp2 rp3 rp3 in big endian
+ * as well as
+ * rp1 rp0 rp1 rp0 in little endian and
+ * rp0 rp1 rp0 rp1 in big endian
+ * First calculate rp2 and rp3
+ */
+#ifdef __BIG_ENDIAN
+ rp2 = (par >> 16);
+ rp2 ^= (rp2 >> 8);
+ rp2 &= 0xff;
+ rp3 = par & 0xffff;
+ rp3 ^= (rp3 >> 8);
+ rp3 &= 0xff;
#else
- ecc_code[0] = ~tmp1;
- ecc_code[1] = ~tmp2;
+ rp3 = (par >> 16);
+ rp3 ^= (rp3 >> 8);
+ rp3 &= 0xff;
+ rp2 = par & 0xffff;
+ rp2 ^= (rp2 >> 8);
+ rp2 &= 0xff;
#endif
- ecc_code[2] = ((~reg1) << 2) | 0x03;
- return 0;
-}
-EXPORT_SYMBOL(nand_calculate_ecc);
+ /* reduce par to 16 bits then calculate rp1 and rp0 */
+ par ^= (par >> 16);
+#ifdef __BIG_ENDIAN
+ rp0 = (par >> 8) & 0xff;
+ rp1 = (par & 0xff);
+#else
+ rp1 = (par >> 8) & 0xff;
+ rp0 = (par & 0xff);
+#endif
-static inline int countbits(uint32_t byte)
-{
- int res = 0;
+ /* finally reduce par to 8 bits */
+ par ^= (par >> 8);
+ par &= 0xff;
- for (;byte; byte >>= 1)
- res += byte & 0x01;
- return res;
+ /*
+ * and calculate rp5..rp15..rp17
+ * note that par = rp4 ^ rp5 and due to the commutative property
+ * of the ^ operator we can say:
+ * rp5 = (par ^ rp4);
+ * The & 0xff seems superfluous, but benchmarking learned that
+ * leaving it out gives slightly worse results. No idea why, probably
+ * it has to do with the way the pipeline in pentium is organized.
+ */
+ rp5 = (par ^ rp4) & 0xff;
+ rp7 = (par ^ rp6) & 0xff;
+ rp9 = (par ^ rp8) & 0xff;
+ rp11 = (par ^ rp10) & 0xff;
+ rp13 = (par ^ rp12) & 0xff;
+ rp15 = (par ^ rp14) & 0xff;
+ if (eccsize_mult == 2)
+ rp17 = (par ^ rp16) & 0xff;
+
+ /*
+ * Finally calculate the ecc bits.
+ * Again here it might seem that there are performance optimisations
+ * possible, but benchmarks showed that on the system this is developed
+ * the code below is the fastest
+ */
+#ifdef CONFIG_MTD_NAND_ECC_SMC
+ code[0] =
+ (invparity[rp7] << 7) |
+ (invparity[rp6] << 6) |
+ (invparity[rp5] << 5) |
+ (invparity[rp4] << 4) |
+ (invparity[rp3] << 3) |
+ (invparity[rp2] << 2) |
+ (invparity[rp1] << 1) |
+ (invparity[rp0]);
+ code[1] =
+ (invparity[rp15] << 7) |
+ (invparity[rp14] << 6) |
+ (invparity[rp13] << 5) |
+ (invparity[rp12] << 4) |
+ (invparity[rp11] << 3) |
+ (invparity[rp10] << 2) |
+ (invparity[rp9] << 1) |
+ (invparity[rp8]);
+#else
+ code[1] =
+ (invparity[rp7] << 7) |
+ (invparity[rp6] << 6) |
+ (invparity[rp5] << 5) |
+ (invparity[rp4] << 4) |
+ (invparity[rp3] << 3) |
+ (invparity[rp2] << 2) |
+ (invparity[rp1] << 1) |
+ (invparity[rp0]);
+ code[0] =
+ (invparity[rp15] << 7) |
+ (invparity[rp14] << 6) |
+ (invparity[rp13] << 5) |
+ (invparity[rp12] << 4) |
+ (invparity[rp11] << 3) |
+ (invparity[rp10] << 2) |
+ (invparity[rp9] << 1) |
+ (invparity[rp8]);
+#endif
+ if (eccsize_mult == 1)
+ code[2] =
+ (invparity[par & 0xf0] << 7) |
+ (invparity[par & 0x0f] << 6) |
+ (invparity[par & 0xcc] << 5) |
+ (invparity[par & 0x33] << 4) |
+ (invparity[par & 0xaa] << 3) |
+ (invparity[par & 0x55] << 2) |
+ 3;
+ else
+ code[2] =
+ (invparity[par & 0xf0] << 7) |
+ (invparity[par & 0x0f] << 6) |
+ (invparity[par & 0xcc] << 5) |
+ (invparity[par & 0x33] << 4) |
+ (invparity[par & 0xaa] << 3) |
+ (invparity[par & 0x55] << 2) |
+ (invparity[rp17] << 1) |
+ (invparity[rp16] << 0);
+ return 0;
}
+EXPORT_SYMBOL(nand_calculate_ecc);
/**
* nand_correct_data - [NAND Interface] Detect and correct bit error(s)
* @mtd: MTD block structure
- * @dat: raw data read from the chip
+ * @buf: raw data read from the chip
* @read_ecc: ECC from the chip
* @calc_ecc: the ECC calculated from raw data
*
- * Detect and correct a 1 bit error for 256 byte block
+ * Detect and correct a 1 bit error for 256/512 byte block
*/
-int nand_correct_data(struct mtd_info *mtd, u_char *dat,
- u_char *read_ecc, u_char *calc_ecc)
+int nand_correct_data(struct mtd_info *mtd, unsigned char *buf,
+ unsigned char *read_ecc, unsigned char *calc_ecc)
{
- uint8_t s0, s1, s2;
+ unsigned char b0, b1, b2;
+ unsigned char byte_addr, bit_addr;
+ /* 256 or 512 bytes/ecc */
+ const uint32_t eccsize_mult =
+ (((struct nand_chip *)mtd->priv)->ecc.size) >> 8;
+ /*
+ * b0 to b2 indicate which bit is faulty (if any)
+ * we might need the xor result more than once,
+ * so keep them in a local var
+ */
#ifdef CONFIG_MTD_NAND_ECC_SMC
- s0 = calc_ecc[0] ^ read_ecc[0];
- s1 = calc_ecc[1] ^ read_ecc[1];
- s2 = calc_ecc[2] ^ read_ecc[2];
+ b0 = read_ecc[0] ^ calc_ecc[0];
+ b1 = read_ecc[1] ^ calc_ecc[1];
#else
- s1 = calc_ecc[0] ^ read_ecc[0];
- s0 = calc_ecc[1] ^ read_ecc[1];
- s2 = calc_ecc[2] ^ read_ecc[2];
+ b0 = read_ecc[1] ^ calc_ecc[1];
+ b1 = read_ecc[0] ^ calc_ecc[0];
#endif
- if ((s0 | s1 | s2) == 0)
- return 0;
-
- /* Check for a single bit error */
- if( ((s0 ^ (s0 >> 1)) & 0x55) == 0x55 &&
- ((s1 ^ (s1 >> 1)) & 0x55) == 0x55 &&
- ((s2 ^ (s2 >> 1)) & 0x54) == 0x54) {
+ b2 = read_ecc[2] ^ calc_ecc[2];
- uint32_t byteoffs, bitnum;
+ /* check if there are any bitfaults */
- byteoffs = (s1 << 0) & 0x80;
- byteoffs |= (s1 << 1) & 0x40;
- byteoffs |= (s1 << 2) & 0x20;
- byteoffs |= (s1 << 3) & 0x10;
+ /* repeated if statements are slightly more efficient than switch ... */
+ /* ordered in order of likelihood */
- byteoffs |= (s0 >> 4) & 0x08;
- byteoffs |= (s0 >> 3) & 0x04;
- byteoffs |= (s0 >> 2) & 0x02;
- byteoffs |= (s0 >> 1) & 0x01;
-
- bitnum = (s2 >> 5) & 0x04;
- bitnum |= (s2 >> 4) & 0x02;
- bitnum |= (s2 >> 3) & 0x01;
-
- dat[byteoffs] ^= (1 << bitnum);
+ if ((b0 | b1 | b2) == 0)
+ return 0; /* no error */
+ if ((((b0 ^ (b0 >> 1)) & 0x55) == 0x55) &&
+ (((b1 ^ (b1 >> 1)) & 0x55) == 0x55) &&
+ ((eccsize_mult == 1 && ((b2 ^ (b2 >> 1)) & 0x54) == 0x54) ||
+ (eccsize_mult == 2 && ((b2 ^ (b2 >> 1)) & 0x55) == 0x55))) {
+ /* single bit error */
+ /*
+ * rp17/rp15/13/11/9/7/5/3/1 indicate which byte is the faulty
+ * byte, cp 5/3/1 indicate the faulty bit.
+ * A lookup table (called addressbits) is used to filter
+ * the bits from the byte they are in.
+ * A marginal optimisation is possible by having three
+ * different lookup tables.
+ * One as we have now (for b0), one for b2
+ * (that would avoid the >> 1), and one for b1 (with all values
+ * << 4). However it was felt that introducing two more tables
+ * hardly justify the gain.
+ *
+ * The b2 shift is there to get rid of the lowest two bits.
+ * We could also do addressbits[b2] >> 1 but for the
+ * performace it does not make any difference
+ */
+ if (eccsize_mult == 1)
+ byte_addr = (addressbits[b1] << 4) + addressbits[b0];
+ else
+ byte_addr = (addressbits[b2 & 0x3] << 8) +
+ (addressbits[b1] << 4) + addressbits[b0];
+ bit_addr = addressbits[b2 >> 2];
+ /* flip the bit */
+ buf[byte_addr] ^= (1 << bit_addr);
return 1;
- }
- if(countbits(s0 | ((uint32_t)s1 << 8) | ((uint32_t)s2 <<16)) == 1)
- return 1;
+ }
+ /* count nr of bits; use table lookup, faster than calculating it */
+ if ((bitsperbyte[b0] + bitsperbyte[b1] + bitsperbyte[b2]) == 1)
+ return 1; /* error in ecc data; no action needed */
- return -EBADMSG;
+ printk(KERN_ERR "uncorrectable error : ");
+ return -1;
}
EXPORT_SYMBOL(nand_correct_data);
MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Steven J. Hill <sjhill@realitydiluted.com>");
+MODULE_AUTHOR("Frans Meulenbroeks <fransmeulenbroeks@gmail.com>");
MODULE_DESCRIPTION("Generic NAND ECC support");
diff --git a/drivers/mtd/nand/nandsim.c b/drivers/mtd/nand/nandsim.c
index 556e8131ecd..ae7c57781a6 100644
--- a/drivers/mtd/nand/nandsim.c
+++ b/drivers/mtd/nand/nandsim.c
@@ -38,7 +38,6 @@
#include <linux/delay.h>
#include <linux/list.h>
#include <linux/random.h>
-#include <asm/div64.h>
/* Default simulator parameters values */
#if !defined(CONFIG_NANDSIM_FIRST_ID_BYTE) || \
diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
index a64ad15b8fd..c0fa9c9edf0 100644
--- a/drivers/mtd/nand/pxa3xx_nand.c
+++ b/drivers/mtd/nand/pxa3xx_nand.c
@@ -115,55 +115,11 @@ enum {
STATE_PIO_WRITING,
};
-struct pxa3xx_nand_timing {
- unsigned int tCH; /* Enable signal hold time */
- unsigned int tCS; /* Enable signal setup time */
- unsigned int tWH; /* ND_nWE high duration */
- unsigned int tWP; /* ND_nWE pulse time */
- unsigned int tRH; /* ND_nRE high duration */
- unsigned int tRP; /* ND_nRE pulse width */
- unsigned int tR; /* ND_nWE high to ND_nRE low for read */
- unsigned int tWHR; /* ND_nWE high to ND_nRE low for status read */
- unsigned int tAR; /* ND_ALE low to ND_nRE low delay */
-};
-
-struct pxa3xx_nand_cmdset {
- uint16_t read1;
- uint16_t read2;
- uint16_t program;
- uint16_t read_status;
- uint16_t read_id;
- uint16_t erase;
- uint16_t reset;
- uint16_t lock;
- uint16_t unlock;
- uint16_t lock_status;
-};
-
-struct pxa3xx_nand_flash {
- struct pxa3xx_nand_timing *timing; /* NAND Flash timing */
- struct pxa3xx_nand_cmdset *cmdset;
-
- uint32_t page_per_block;/* Pages per block (PG_PER_BLK) */
- uint32_t page_size; /* Page size in bytes (PAGE_SZ) */
- uint32_t flash_width; /* Width of Flash memory (DWIDTH_M) */
- uint32_t dfc_width; /* Width of flash controller(DWIDTH_C) */
- uint32_t num_blocks; /* Number of physical blocks in Flash */
- uint32_t chip_id;
-
- /* NOTE: these are automatically calculated, do not define */
- size_t oob_size;
- size_t read_id_bytes;
-
- unsigned int col_addr_cycles;
- unsigned int row_addr_cycles;
-};
-
struct pxa3xx_nand_info {
struct nand_chip nand_chip;
struct platform_device *pdev;
- struct pxa3xx_nand_flash *flash_info;
+ const struct pxa3xx_nand_flash *flash_info;
struct clk *clk;
void __iomem *mmio_base;
@@ -202,12 +158,20 @@ struct pxa3xx_nand_info {
uint32_t ndcb0;
uint32_t ndcb1;
uint32_t ndcb2;
+
+ /* calculated from pxa3xx_nand_flash data */
+ size_t oob_size;
+ size_t read_id_bytes;
+
+ unsigned int col_addr_cycles;
+ unsigned int row_addr_cycles;
};
static int use_dma = 1;
module_param(use_dma, bool, 0444);
MODULE_PARM_DESC(use_dma, "enable DMA for data transfering to/from NAND HW");
+#ifdef CONFIG_MTD_NAND_PXA3xx_BUILTIN
static struct pxa3xx_nand_cmdset smallpage_cmdset = {
.read1 = 0x0000,
.read2 = 0x0050,
@@ -291,11 +255,35 @@ static struct pxa3xx_nand_flash micron1GbX16 = {
.chip_id = 0xb12c,
};
+static struct pxa3xx_nand_timing stm2GbX16_timing = {
+ .tCH = 10,
+ .tCS = 35,
+ .tWH = 15,
+ .tWP = 25,
+ .tRH = 15,
+ .tRP = 25,
+ .tR = 25000,
+ .tWHR = 60,
+ .tAR = 10,
+};
+
+static struct pxa3xx_nand_flash stm2GbX16 = {
+ .timing = &stm2GbX16_timing,
+ .page_per_block = 64,
+ .page_size = 2048,
+ .flash_width = 16,
+ .dfc_width = 16,
+ .num_blocks = 2048,
+ .chip_id = 0xba20,
+};
+
static struct pxa3xx_nand_flash *builtin_flash_types[] = {
&samsung512MbX16,
&micron1GbX8,
&micron1GbX16,
+ &stm2GbX16,
};
+#endif /* CONFIG_MTD_NAND_PXA3xx_BUILTIN */
#define NDTR0_tCH(c) (min((c), 7) << 19)
#define NDTR0_tCS(c) (min((c), 7) << 16)
@@ -312,7 +300,7 @@ static struct pxa3xx_nand_flash *builtin_flash_types[] = {
#define ns2cycle(ns, clk) (int)(((ns) * (clk / 1000000) / 1000) + 1)
static void pxa3xx_nand_set_timing(struct pxa3xx_nand_info *info,
- struct pxa3xx_nand_timing *t)
+ const struct pxa3xx_nand_timing *t)
{
unsigned long nand_clk = clk_get_rate(info->clk);
uint32_t ndtr0, ndtr1;
@@ -354,8 +342,8 @@ static int wait_for_event(struct pxa3xx_nand_info *info, uint32_t event)
static int prepare_read_prog_cmd(struct pxa3xx_nand_info *info,
uint16_t cmd, int column, int page_addr)
{
- struct pxa3xx_nand_flash *f = info->flash_info;
- struct pxa3xx_nand_cmdset *cmdset = f->cmdset;
+ const struct pxa3xx_nand_flash *f = info->flash_info;
+ const struct pxa3xx_nand_cmdset *cmdset = f->cmdset;
/* calculate data size */
switch (f->page_size) {
@@ -373,14 +361,14 @@ static int prepare_read_prog_cmd(struct pxa3xx_nand_info *info,
info->ndcb0 = cmd | ((cmd & 0xff00) ? NDCB0_DBC : 0);
info->ndcb1 = 0;
info->ndcb2 = 0;
- info->ndcb0 |= NDCB0_ADDR_CYC(f->row_addr_cycles + f->col_addr_cycles);
+ info->ndcb0 |= NDCB0_ADDR_CYC(info->row_addr_cycles + info->col_addr_cycles);
- if (f->col_addr_cycles == 2) {
+ if (info->col_addr_cycles == 2) {
/* large block, 2 cycles for column address
* row address starts from 3rd cycle
*/
info->ndcb1 |= (page_addr << 16) | (column & 0xffff);
- if (f->row_addr_cycles == 3)
+ if (info->row_addr_cycles == 3)
info->ndcb2 = (page_addr >> 16) & 0xff;
} else
/* small block, 1 cycles for column address
@@ -406,7 +394,7 @@ static int prepare_erase_cmd(struct pxa3xx_nand_info *info,
static int prepare_other_cmd(struct pxa3xx_nand_info *info, uint16_t cmd)
{
- struct pxa3xx_nand_cmdset *cmdset = info->flash_info->cmdset;
+ const struct pxa3xx_nand_cmdset *cmdset = info->flash_info->cmdset;
info->ndcb0 = cmd | ((cmd & 0xff00) ? NDCB0_DBC : 0);
info->ndcb1 = 0;
@@ -641,8 +629,8 @@ static void pxa3xx_nand_cmdfunc(struct mtd_info *mtd, unsigned command,
int column, int page_addr)
{
struct pxa3xx_nand_info *info = mtd->priv;
- struct pxa3xx_nand_flash *flash_info = info->flash_info;
- struct pxa3xx_nand_cmdset *cmdset = flash_info->cmdset;
+ const struct pxa3xx_nand_flash *flash_info = info->flash_info;
+ const struct pxa3xx_nand_cmdset *cmdset = flash_info->cmdset;
int ret;
info->use_dma = (use_dma) ? 1 : 0;
@@ -720,7 +708,7 @@ static void pxa3xx_nand_cmdfunc(struct mtd_info *mtd, unsigned command,
info->use_dma = 0; /* force PIO read */
info->buf_start = 0;
info->buf_count = (command == NAND_CMD_READID) ?
- flash_info->read_id_bytes : 1;
+ info->read_id_bytes : 1;
if (prepare_other_cmd(info, (command == NAND_CMD_READID) ?
cmdset->read_id : cmdset->read_status))
@@ -861,8 +849,8 @@ static int pxa3xx_nand_ecc_correct(struct mtd_info *mtd,
static int __readid(struct pxa3xx_nand_info *info, uint32_t *id)
{
- struct pxa3xx_nand_flash *f = info->flash_info;
- struct pxa3xx_nand_cmdset *cmdset = f->cmdset;
+ const struct pxa3xx_nand_flash *f = info->flash_info;
+ const struct pxa3xx_nand_cmdset *cmdset = f->cmdset;
uint32_t ndcr;
uint8_t id_buff[8];
@@ -891,7 +879,7 @@ fail_timeout:
}
static int pxa3xx_nand_config_flash(struct pxa3xx_nand_info *info,
- struct pxa3xx_nand_flash *f)
+ const struct pxa3xx_nand_flash *f)
{
struct platform_device *pdev = info->pdev;
struct pxa3xx_nand_platform_data *pdata = pdev->dev.platform_data;
@@ -904,25 +892,25 @@ static int pxa3xx_nand_config_flash(struct pxa3xx_nand_info *info,
return -EINVAL;
/* calculate flash information */
- f->oob_size = (f->page_size == 2048) ? 64 : 16;
- f->read_id_bytes = (f->page_size == 2048) ? 4 : 2;
+ info->oob_size = (f->page_size == 2048) ? 64 : 16;
+ info->read_id_bytes = (f->page_size == 2048) ? 4 : 2;
/* calculate addressing information */
- f->col_addr_cycles = (f->page_size == 2048) ? 2 : 1;
+ info->col_addr_cycles = (f->page_size == 2048) ? 2 : 1;
if (f->num_blocks * f->page_per_block > 65536)
- f->row_addr_cycles = 3;
+ info->row_addr_cycles = 3;
else
- f->row_addr_cycles = 2;
+ info->row_addr_cycles = 2;
ndcr |= (pdata->enable_arbiter) ? NDCR_ND_ARB_EN : 0;
- ndcr |= (f->col_addr_cycles == 2) ? NDCR_RA_START : 0;
+ ndcr |= (info->col_addr_cycles == 2) ? NDCR_RA_START : 0;
ndcr |= (f->page_per_block == 64) ? NDCR_PG_PER_BLK : 0;
ndcr |= (f->page_size == 2048) ? NDCR_PAGE_SZ : 0;
ndcr |= (f->flash_width == 16) ? NDCR_DWIDTH_M : 0;
ndcr |= (f->dfc_width == 16) ? NDCR_DWIDTH_C : 0;
- ndcr |= NDCR_RD_ID_CNT(f->read_id_bytes);
+ ndcr |= NDCR_RD_ID_CNT(info->read_id_bytes);
ndcr |= NDCR_SPARE_EN; /* enable spare by default */
info->reg_ndcr = ndcr;
@@ -932,12 +920,27 @@ static int pxa3xx_nand_config_flash(struct pxa3xx_nand_info *info,
return 0;
}
-static int pxa3xx_nand_detect_flash(struct pxa3xx_nand_info *info)
+static int pxa3xx_nand_detect_flash(struct pxa3xx_nand_info *info,
+ const struct pxa3xx_nand_platform_data *pdata)
{
- struct pxa3xx_nand_flash *f;
- uint32_t id;
+ const struct pxa3xx_nand_flash *f;
+ uint32_t id = -1;
int i;
+ for (i = 0; i<pdata->num_flash; ++i) {
+ f = pdata->flash + i;
+
+ if (pxa3xx_nand_config_flash(info, f))
+ continue;
+
+ if (__readid(info, &id))
+ continue;
+
+ if (id == f->chip_id)
+ return 0;
+ }
+
+#ifdef CONFIG_MTD_NAND_PXA3xx_BUILTIN
for (i = 0; i < ARRAY_SIZE(builtin_flash_types); i++) {
f = builtin_flash_types[i];
@@ -951,7 +954,11 @@ static int pxa3xx_nand_detect_flash(struct pxa3xx_nand_info *info)
if (id == f->chip_id)
return 0;
}
+#endif
+ dev_warn(&info->pdev->dev,
+ "failed to detect configured nand flash; found %04x instead of\n",
+ id);
return -ENODEV;
}
@@ -1014,7 +1021,7 @@ static struct nand_ecclayout hw_largepage_ecclayout = {
static void pxa3xx_nand_init_mtd(struct mtd_info *mtd,
struct pxa3xx_nand_info *info)
{
- struct pxa3xx_nand_flash *f = info->flash_info;
+ const struct pxa3xx_nand_flash *f = info->flash_info;
struct nand_chip *this = &info->nand_chip;
this->options = (f->flash_width == 16) ? NAND_BUSWIDTH_16: 0;
@@ -1135,7 +1142,7 @@ static int pxa3xx_nand_probe(struct platform_device *pdev)
goto fail_free_buf;
}
- ret = pxa3xx_nand_detect_flash(info);
+ ret = pxa3xx_nand_detect_flash(info, pdata);
if (ret) {
dev_err(&pdev->dev, "failed to detect flash\n");
ret = -ENODEV;
diff --git a/drivers/mtd/nand/sh_flctl.c b/drivers/mtd/nand/sh_flctl.c
new file mode 100644
index 00000000000..821acb08ff1
--- /dev/null
+++ b/drivers/mtd/nand/sh_flctl.c
@@ -0,0 +1,878 @@
+/*
+ * SuperH FLCTL nand controller
+ *
+ * Copyright © 2008 Renesas Solutions Corp.
+ * Copyright © 2008 Atom Create Engineering Co., Ltd.
+ *
+ * Based on fsl_elbc_nand.c, Copyright © 2006-2007 Freescale Semiconductor
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/sh_flctl.h>
+
+static struct nand_ecclayout flctl_4secc_oob_16 = {
+ .eccbytes = 10,
+ .eccpos = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9},
+ .oobfree = {
+ {.offset = 12,
+ . length = 4} },
+};
+
+static struct nand_ecclayout flctl_4secc_oob_64 = {
+ .eccbytes = 10,
+ .eccpos = {48, 49, 50, 51, 52, 53, 54, 55, 56, 57},
+ .oobfree = {
+ {.offset = 60,
+ . length = 4} },
+};
+
+static uint8_t scan_ff_pattern[] = { 0xff, 0xff };
+
+static struct nand_bbt_descr flctl_4secc_smallpage = {
+ .options = NAND_BBT_SCAN2NDPAGE,
+ .offs = 11,
+ .len = 1,
+ .pattern = scan_ff_pattern,
+};
+
+static struct nand_bbt_descr flctl_4secc_largepage = {
+ .options = 0,
+ .offs = 58,
+ .len = 2,
+ .pattern = scan_ff_pattern,
+};
+
+static void empty_fifo(struct sh_flctl *flctl)
+{
+ writel(0x000c0000, FLINTDMACR(flctl)); /* FIFO Clear */
+ writel(0x00000000, FLINTDMACR(flctl)); /* Clear Error flags */
+}
+
+static void start_translation(struct sh_flctl *flctl)
+{
+ writeb(TRSTRT, FLTRCR(flctl));
+}
+
+static void wait_completion(struct sh_flctl *flctl)
+{
+ uint32_t timeout = LOOP_TIMEOUT_MAX;
+
+ while (timeout--) {
+ if (readb(FLTRCR(flctl)) & TREND) {
+ writeb(0x0, FLTRCR(flctl));
+ return;
+ }
+ udelay(1);
+ }
+
+ printk(KERN_ERR "wait_completion(): Timeout occured \n");
+ writeb(0x0, FLTRCR(flctl));
+}
+
+static void set_addr(struct mtd_info *mtd, int column, int page_addr)
+{
+ struct sh_flctl *flctl = mtd_to_flctl(mtd);
+ uint32_t addr = 0;
+
+ if (column == -1) {
+ addr = page_addr; /* ERASE1 */
+ } else if (page_addr != -1) {
+ /* SEQIN, READ0, etc.. */
+ if (flctl->page_size) {
+ addr = column & 0x0FFF;
+ addr |= (page_addr & 0xff) << 16;
+ addr |= ((page_addr >> 8) & 0xff) << 24;
+ /* big than 128MB */
+ if (flctl->rw_ADRCNT == ADRCNT2_E) {
+ uint32_t addr2;
+ addr2 = (page_addr >> 16) & 0xff;
+ writel(addr2, FLADR2(flctl));
+ }
+ } else {
+ addr = column;
+ addr |= (page_addr & 0xff) << 8;
+ addr |= ((page_addr >> 8) & 0xff) << 16;
+ addr |= ((page_addr >> 16) & 0xff) << 24;
+ }
+ }
+ writel(addr, FLADR(flctl));
+}
+
+static void wait_rfifo_ready(struct sh_flctl *flctl)
+{
+ uint32_t timeout = LOOP_TIMEOUT_MAX;
+
+ while (timeout--) {
+ uint32_t val;
+ /* check FIFO */
+ val = readl(FLDTCNTR(flctl)) >> 16;
+ if (val & 0xFF)
+ return;
+ udelay(1);
+ }
+ printk(KERN_ERR "wait_rfifo_ready(): Timeout occured \n");
+}
+
+static void wait_wfifo_ready(struct sh_flctl *flctl)
+{
+ uint32_t len, timeout = LOOP_TIMEOUT_MAX;
+
+ while (timeout--) {
+ /* check FIFO */
+ len = (readl(FLDTCNTR(flctl)) >> 16) & 0xFF;
+ if (len >= 4)
+ return;
+ udelay(1);
+ }
+ printk(KERN_ERR "wait_wfifo_ready(): Timeout occured \n");
+}
+
+static int wait_recfifo_ready(struct sh_flctl *flctl)
+{
+ uint32_t timeout = LOOP_TIMEOUT_MAX;
+ int checked[4];
+ void __iomem *ecc_reg[4];
+ int i;
+ uint32_t data, size;
+
+ memset(checked, 0, sizeof(checked));
+
+ while (timeout--) {
+ size = readl(FLDTCNTR(flctl)) >> 24;
+ if (size & 0xFF)
+ return 0; /* success */
+
+ if (readl(FL4ECCCR(flctl)) & _4ECCFA)
+ return 1; /* can't correct */
+
+ udelay(1);
+ if (!(readl(FL4ECCCR(flctl)) & _4ECCEND))
+ continue;
+
+ /* start error correction */
+ ecc_reg[0] = FL4ECCRESULT0(flctl);
+ ecc_reg[1] = FL4ECCRESULT1(flctl);
+ ecc_reg[2] = FL4ECCRESULT2(flctl);
+ ecc_reg[3] = FL4ECCRESULT3(flctl);
+
+ for (i = 0; i < 3; i++) {
+ data = readl(ecc_reg[i]);
+ if (data != INIT_FL4ECCRESULT_VAL && !checked[i]) {
+ uint8_t org;
+ int index;
+
+ index = data >> 16;
+ org = flctl->done_buff[index];
+ flctl->done_buff[index] = org ^ (data & 0xFF);
+ checked[i] = 1;
+ }
+ }
+
+ writel(0, FL4ECCCR(flctl));
+ }
+
+ printk(KERN_ERR "wait_recfifo_ready(): Timeout occured \n");
+ return 1; /* timeout */
+}
+
+static void wait_wecfifo_ready(struct sh_flctl *flctl)
+{
+ uint32_t timeout = LOOP_TIMEOUT_MAX;
+ uint32_t len;
+
+ while (timeout--) {
+ /* check FLECFIFO */
+ len = (readl(FLDTCNTR(flctl)) >> 24) & 0xFF;
+ if (len >= 4)
+ return;
+ udelay(1);
+ }
+ printk(KERN_ERR "wait_wecfifo_ready(): Timeout occured \n");
+}
+
+static void read_datareg(struct sh_flctl *flctl, int offset)
+{
+ unsigned long data;
+ unsigned long *buf = (unsigned long *)&flctl->done_buff[offset];
+
+ wait_completion(flctl);
+
+ data = readl(FLDATAR(flctl));
+ *buf = le32_to_cpu(data);
+}
+
+static void read_fiforeg(struct sh_flctl *flctl, int rlen, int offset)
+{
+ int i, len_4align;
+ unsigned long *buf = (unsigned long *)&flctl->done_buff[offset];
+ void *fifo_addr = (void *)FLDTFIFO(flctl);
+
+ len_4align = (rlen + 3) / 4;
+
+ for (i = 0; i < len_4align; i++) {
+ wait_rfifo_ready(flctl);
+ buf[i] = readl(fifo_addr);
+ buf[i] = be32_to_cpu(buf[i]);
+ }
+}
+
+static int read_ecfiforeg(struct sh_flctl *flctl, uint8_t *buff)
+{
+ int i;
+ unsigned long *ecc_buf = (unsigned long *)buff;
+ void *fifo_addr = (void *)FLECFIFO(flctl);
+
+ for (i = 0; i < 4; i++) {
+ if (wait_recfifo_ready(flctl))
+ return 1;
+ ecc_buf[i] = readl(fifo_addr);
+ ecc_buf[i] = be32_to_cpu(ecc_buf[i]);
+ }
+
+ return 0;
+}
+
+static void write_fiforeg(struct sh_flctl *flctl, int rlen, int offset)
+{
+ int i, len_4align;
+ unsigned long *data = (unsigned long *)&flctl->done_buff[offset];
+ void *fifo_addr = (void *)FLDTFIFO(flctl);
+
+ len_4align = (rlen + 3) / 4;
+ for (i = 0; i < len_4align; i++) {
+ wait_wfifo_ready(flctl);
+ writel(cpu_to_be32(data[i]), fifo_addr);
+ }
+}
+
+static void set_cmd_regs(struct mtd_info *mtd, uint32_t cmd, uint32_t flcmcdr_val)
+{
+ struct sh_flctl *flctl = mtd_to_flctl(mtd);
+ uint32_t flcmncr_val = readl(FLCMNCR(flctl));
+ uint32_t flcmdcr_val, addr_len_bytes = 0;
+
+ /* Set SNAND bit if page size is 2048byte */
+ if (flctl->page_size)
+ flcmncr_val |= SNAND_E;
+ else
+ flcmncr_val &= ~SNAND_E;
+
+ /* default FLCMDCR val */
+ flcmdcr_val = DOCMD1_E | DOADR_E;
+
+ /* Set for FLCMDCR */
+ switch (cmd) {
+ case NAND_CMD_ERASE1:
+ addr_len_bytes = flctl->erase_ADRCNT;
+ flcmdcr_val |= DOCMD2_E;
+ break;
+ case NAND_CMD_READ0:
+ case NAND_CMD_READOOB:
+ addr_len_bytes = flctl->rw_ADRCNT;
+ flcmdcr_val |= CDSRC_E;
+ break;
+ case NAND_CMD_SEQIN:
+ /* This case is that cmd is READ0 or READ1 or READ00 */
+ flcmdcr_val &= ~DOADR_E; /* ONLY execute 1st cmd */
+ break;
+ case NAND_CMD_PAGEPROG:
+ addr_len_bytes = flctl->rw_ADRCNT;
+ flcmdcr_val |= DOCMD2_E | CDSRC_E | SELRW;
+ break;
+ case NAND_CMD_READID:
+ flcmncr_val &= ~SNAND_E;
+ addr_len_bytes = ADRCNT_1;
+ break;
+ case NAND_CMD_STATUS:
+ case NAND_CMD_RESET:
+ flcmncr_val &= ~SNAND_E;
+ flcmdcr_val &= ~(DOADR_E | DOSR_E);
+ break;
+ default:
+ break;
+ }
+
+ /* Set address bytes parameter */
+ flcmdcr_val |= addr_len_bytes;
+
+ /* Now actually write */
+ writel(flcmncr_val, FLCMNCR(flctl));
+ writel(flcmdcr_val, FLCMDCR(flctl));
+ writel(flcmcdr_val, FLCMCDR(flctl));
+}
+
+static int flctl_read_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip,
+ uint8_t *buf)
+{
+ int i, eccsize = chip->ecc.size;
+ int eccbytes = chip->ecc.bytes;
+ int eccsteps = chip->ecc.steps;
+ uint8_t *p = buf;
+ struct sh_flctl *flctl = mtd_to_flctl(mtd);
+
+ for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize)
+ chip->read_buf(mtd, p, eccsize);
+
+ for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
+ if (flctl->hwecc_cant_correct[i])
+ mtd->ecc_stats.failed++;
+ else
+ mtd->ecc_stats.corrected += 0;
+ }
+
+ return 0;
+}
+
+static void flctl_write_page_hwecc(struct mtd_info *mtd, struct nand_chip *chip,
+ const uint8_t *buf)
+{
+ int i, eccsize = chip->ecc.size;
+ int eccbytes = chip->ecc.bytes;
+ int eccsteps = chip->ecc.steps;
+ const uint8_t *p = buf;
+
+ for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize)
+ chip->write_buf(mtd, p, eccsize);
+}
+
+static void execmd_read_page_sector(struct mtd_info *mtd, int page_addr)
+{
+ struct sh_flctl *flctl = mtd_to_flctl(mtd);
+ int sector, page_sectors;
+
+ if (flctl->page_size)
+ page_sectors = 4;
+ else
+ page_sectors = 1;
+
+ writel(readl(FLCMNCR(flctl)) | ACM_SACCES_MODE | _4ECCCORRECT,
+ FLCMNCR(flctl));
+
+ set_cmd_regs(mtd, NAND_CMD_READ0,
+ (NAND_CMD_READSTART << 8) | NAND_CMD_READ0);
+
+ for (sector = 0; sector < page_sectors; sector++) {
+ int ret;
+
+ empty_fifo(flctl);
+ writel(readl(FLCMDCR(flctl)) | 1, FLCMDCR(flctl));
+ writel(page_addr << 2 | sector, FLADR(flctl));
+
+ start_translation(flctl);
+ read_fiforeg(flctl, 512, 512 * sector);
+
+ ret = read_ecfiforeg(flctl,
+ &flctl->done_buff[mtd->writesize + 16 * sector]);
+
+ if (ret)
+ flctl->hwecc_cant_correct[sector] = 1;
+
+ writel(0x0, FL4ECCCR(flctl));
+ wait_completion(flctl);
+ }
+ writel(readl(FLCMNCR(flctl)) & ~(ACM_SACCES_MODE | _4ECCCORRECT),
+ FLCMNCR(flctl));
+}
+
+static void execmd_read_oob(struct mtd_info *mtd, int page_addr)
+{
+ struct sh_flctl *flctl = mtd_to_flctl(mtd);
+
+ set_cmd_regs(mtd, NAND_CMD_READ0,
+ (NAND_CMD_READSTART << 8) | NAND_CMD_READ0);
+
+ empty_fifo(flctl);
+ if (flctl->page_size) {
+ int i;
+ /* In case that the page size is 2k */
+ for (i = 0; i < 16 * 3; i++)
+ flctl->done_buff[i] = 0xFF;
+
+ set_addr(mtd, 3 * 528 + 512, page_addr);
+ writel(16, FLDTCNTR(flctl));
+
+ start_translation(flctl);
+ read_fiforeg(flctl, 16, 16 * 3);
+ wait_completion(flctl);
+ } else {
+ /* In case that the page size is 512b */
+ set_addr(mtd, 512, page_addr);
+ writel(16, FLDTCNTR(flctl));
+
+ start_translation(flctl);
+ read_fiforeg(flctl, 16, 0);
+ wait_completion(flctl);
+ }
+}
+
+static void execmd_write_page_sector(struct mtd_info *mtd)
+{
+ struct sh_flctl *flctl = mtd_to_flctl(mtd);
+ int i, page_addr = flctl->seqin_page_addr;
+ int sector, page_sectors;
+
+ if (flctl->page_size)
+ page_sectors = 4;
+ else
+ page_sectors = 1;
+
+ writel(readl(FLCMNCR(flctl)) | ACM_SACCES_MODE, FLCMNCR(flctl));
+
+ set_cmd_regs(mtd, NAND_CMD_PAGEPROG,
+ (NAND_CMD_PAGEPROG << 8) | NAND_CMD_SEQIN);
+
+ for (sector = 0; sector < page_sectors; sector++) {
+ empty_fifo(flctl);
+ writel(readl(FLCMDCR(flctl)) | 1, FLCMDCR(flctl));
+ writel(page_addr << 2 | sector, FLADR(flctl));
+
+ start_translation(flctl);
+ write_fiforeg(flctl, 512, 512 * sector);
+
+ for (i = 0; i < 4; i++) {
+ wait_wecfifo_ready(flctl); /* wait for write ready */
+ writel(0xFFFFFFFF, FLECFIFO(flctl));
+ }
+ wait_completion(flctl);
+ }
+
+ writel(readl(FLCMNCR(flctl)) & ~ACM_SACCES_MODE, FLCMNCR(flctl));
+}
+
+static void execmd_write_oob(struct mtd_info *mtd)
+{
+ struct sh_flctl *flctl = mtd_to_flctl(mtd);
+ int page_addr = flctl->seqin_page_addr;
+ int sector, page_sectors;
+
+ if (flctl->page_size) {
+ sector = 3;
+ page_sectors = 4;
+ } else {
+ sector = 0;
+ page_sectors = 1;
+ }
+
+ set_cmd_regs(mtd, NAND_CMD_PAGEPROG,
+ (NAND_CMD_PAGEPROG << 8) | NAND_CMD_SEQIN);
+
+ for (; sector < page_sectors; sector++) {
+ empty_fifo(flctl);
+ set_addr(mtd, sector * 528 + 512, page_addr);
+ writel(16, FLDTCNTR(flctl)); /* set read size */
+
+ start_translation(flctl);
+ write_fiforeg(flctl, 16, 16 * sector);
+ wait_completion(flctl);
+ }
+}
+
+static void flctl_cmdfunc(struct mtd_info *mtd, unsigned int command,
+ int column, int page_addr)
+{
+ struct sh_flctl *flctl = mtd_to_flctl(mtd);
+ uint32_t read_cmd = 0;
+
+ flctl->read_bytes = 0;
+ if (command != NAND_CMD_PAGEPROG)
+ flctl->index = 0;
+
+ switch (command) {
+ case NAND_CMD_READ1:
+ case NAND_CMD_READ0:
+ if (flctl->hwecc) {
+ /* read page with hwecc */
+ execmd_read_page_sector(mtd, page_addr);
+ break;
+ }
+ empty_fifo(flctl);
+ if (flctl->page_size)
+ set_cmd_regs(mtd, command, (NAND_CMD_READSTART << 8)
+ | command);
+ else
+ set_cmd_regs(mtd, command, command);
+
+ set_addr(mtd, 0, page_addr);
+
+ flctl->read_bytes = mtd->writesize + mtd->oobsize;
+ flctl->index += column;
+ goto read_normal_exit;
+
+ case NAND_CMD_READOOB:
+ if (flctl->hwecc) {
+ /* read page with hwecc */
+ execmd_read_oob(mtd, page_addr);
+ break;
+ }
+
+ empty_fifo(flctl);
+ if (flctl->page_size) {
+ set_cmd_regs(mtd, command, (NAND_CMD_READSTART << 8)
+ | NAND_CMD_READ0);
+ set_addr(mtd, mtd->writesize, page_addr);
+ } else {
+ set_cmd_regs(mtd, command, command);
+ set_addr(mtd, 0, page_addr);
+ }
+ flctl->read_bytes = mtd->oobsize;
+ goto read_normal_exit;
+
+ case NAND_CMD_READID:
+ empty_fifo(flctl);
+ set_cmd_regs(mtd, command, command);
+ set_addr(mtd, 0, 0);
+
+ flctl->read_bytes = 4;
+ writel(flctl->read_bytes, FLDTCNTR(flctl)); /* set read size */
+ start_translation(flctl);
+ read_datareg(flctl, 0); /* read and end */
+ break;
+
+ case NAND_CMD_ERASE1:
+ flctl->erase1_page_addr = page_addr;
+ break;
+
+ case NAND_CMD_ERASE2:
+ set_cmd_regs(mtd, NAND_CMD_ERASE1,
+ (command << 8) | NAND_CMD_ERASE1);
+ set_addr(mtd, -1, flctl->erase1_page_addr);
+ start_translation(flctl);
+ wait_completion(flctl);
+ break;
+
+ case NAND_CMD_SEQIN:
+ if (!flctl->page_size) {
+ /* output read command */
+ if (column >= mtd->writesize) {
+ column -= mtd->writesize;
+ read_cmd = NAND_CMD_READOOB;
+ } else if (column < 256) {
+ read_cmd = NAND_CMD_READ0;
+ } else {
+ column -= 256;
+ read_cmd = NAND_CMD_READ1;
+ }
+ }
+ flctl->seqin_column = column;
+ flctl->seqin_page_addr = page_addr;
+ flctl->seqin_read_cmd = read_cmd;
+ break;
+
+ case NAND_CMD_PAGEPROG:
+ empty_fifo(flctl);
+ if (!flctl->page_size) {
+ set_cmd_regs(mtd, NAND_CMD_SEQIN,
+ flctl->seqin_read_cmd);
+ set_addr(mtd, -1, -1);
+ writel(0, FLDTCNTR(flctl)); /* set 0 size */
+ start_translation(flctl);
+ wait_completion(flctl);
+ }
+ if (flctl->hwecc) {
+ /* write page with hwecc */
+ if (flctl->seqin_column == mtd->writesize)
+ execmd_write_oob(mtd);
+ else if (!flctl->seqin_column)
+ execmd_write_page_sector(mtd);
+ else
+ printk(KERN_ERR "Invalid address !?\n");
+ break;
+ }
+ set_cmd_regs(mtd, command, (command << 8) | NAND_CMD_SEQIN);
+ set_addr(mtd, flctl->seqin_column, flctl->seqin_page_addr);
+ writel(flctl->index, FLDTCNTR(flctl)); /* set write size */
+ start_translation(flctl);
+ write_fiforeg(flctl, flctl->index, 0);
+ wait_completion(flctl);
+ break;
+
+ case NAND_CMD_STATUS:
+ set_cmd_regs(mtd, command, command);
+ set_addr(mtd, -1, -1);
+
+ flctl->read_bytes = 1;
+ writel(flctl->read_bytes, FLDTCNTR(flctl)); /* set read size */
+ start_translation(flctl);
+ read_datareg(flctl, 0); /* read and end */
+ break;
+
+ case NAND_CMD_RESET:
+ set_cmd_regs(mtd, command, command);
+ set_addr(mtd, -1, -1);
+
+ writel(0, FLDTCNTR(flctl)); /* set 0 size */
+ start_translation(flctl);
+ wait_completion(flctl);
+ break;
+
+ default:
+ break;
+ }
+ return;
+
+read_normal_exit:
+ writel(flctl->read_bytes, FLDTCNTR(flctl)); /* set read size */
+ start_translation(flctl);
+ read_fiforeg(flctl, flctl->read_bytes, 0);
+ wait_completion(flctl);
+ return;
+}
+
+static void flctl_select_chip(struct mtd_info *mtd, int chipnr)
+{
+ struct sh_flctl *flctl = mtd_to_flctl(mtd);
+ uint32_t flcmncr_val = readl(FLCMNCR(flctl));
+
+ switch (chipnr) {
+ case -1:
+ flcmncr_val &= ~CE0_ENABLE;
+ writel(flcmncr_val, FLCMNCR(flctl));
+ break;
+ case 0:
+ flcmncr_val |= CE0_ENABLE;
+ writel(flcmncr_val, FLCMNCR(flctl));
+ break;
+ default:
+ BUG();
+ }
+}
+
+static void flctl_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len)
+{
+ struct sh_flctl *flctl = mtd_to_flctl(mtd);
+ int i, index = flctl->index;
+
+ for (i = 0; i < len; i++)
+ flctl->done_buff[index + i] = buf[i];
+ flctl->index += len;
+}
+
+static uint8_t flctl_read_byte(struct mtd_info *mtd)
+{
+ struct sh_flctl *flctl = mtd_to_flctl(mtd);
+ int index = flctl->index;
+ uint8_t data;
+
+ data = flctl->done_buff[index];
+ flctl->index++;
+ return data;
+}
+
+static void flctl_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
+{
+ int i;
+
+ for (i = 0; i < len; i++)
+ buf[i] = flctl_read_byte(mtd);
+}
+
+static int flctl_verify_buf(struct mtd_info *mtd, const u_char *buf, int len)
+{
+ int i;
+
+ for (i = 0; i < len; i++)
+ if (buf[i] != flctl_read_byte(mtd))
+ return -EFAULT;
+ return 0;
+}
+
+static void flctl_register_init(struct sh_flctl *flctl, unsigned long val)
+{
+ writel(val, FLCMNCR(flctl));
+}
+
+static int flctl_chip_init_tail(struct mtd_info *mtd)
+{
+ struct sh_flctl *flctl = mtd_to_flctl(mtd);
+ struct nand_chip *chip = &flctl->chip;
+
+ if (mtd->writesize == 512) {
+ flctl->page_size = 0;
+ if (chip->chipsize > (32 << 20)) {
+ /* big than 32MB */
+ flctl->rw_ADRCNT = ADRCNT_4;
+ flctl->erase_ADRCNT = ADRCNT_3;
+ } else if (chip->chipsize > (2 << 16)) {
+ /* big than 128KB */
+ flctl->rw_ADRCNT = ADRCNT_3;
+ flctl->erase_ADRCNT = ADRCNT_2;
+ } else {
+ flctl->rw_ADRCNT = ADRCNT_2;
+ flctl->erase_ADRCNT = ADRCNT_1;
+ }
+ } else {
+ flctl->page_size = 1;
+ if (chip->chipsize > (128 << 20)) {
+ /* big than 128MB */
+ flctl->rw_ADRCNT = ADRCNT2_E;
+ flctl->erase_ADRCNT = ADRCNT_3;
+ } else if (chip->chipsize > (8 << 16)) {
+ /* big than 512KB */
+ flctl->rw_ADRCNT = ADRCNT_4;
+ flctl->erase_ADRCNT = ADRCNT_2;
+ } else {
+ flctl->rw_ADRCNT = ADRCNT_3;
+ flctl->erase_ADRCNT = ADRCNT_1;
+ }
+ }
+
+ if (flctl->hwecc) {
+ if (mtd->writesize == 512) {
+ chip->ecc.layout = &flctl_4secc_oob_16;
+ chip->badblock_pattern = &flctl_4secc_smallpage;
+ } else {
+ chip->ecc.layout = &flctl_4secc_oob_64;
+ chip->badblock_pattern = &flctl_4secc_largepage;
+ }
+
+ chip->ecc.size = 512;
+ chip->ecc.bytes = 10;
+ chip->ecc.read_page = flctl_read_page_hwecc;
+ chip->ecc.write_page = flctl_write_page_hwecc;
+ chip->ecc.mode = NAND_ECC_HW;
+
+ /* 4 symbols ECC enabled */
+ writel(readl(FLCMNCR(flctl)) | _4ECCEN | ECCPOS2 | ECCPOS_02,
+ FLCMNCR(flctl));
+ } else {
+ chip->ecc.mode = NAND_ECC_SOFT;
+ }
+
+ return 0;
+}
+
+static int __init flctl_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ struct sh_flctl *flctl;
+ struct mtd_info *flctl_mtd;
+ struct nand_chip *nand;
+ struct sh_flctl_platform_data *pdata;
+ int ret;
+
+ pdata = pdev->dev.platform_data;
+ if (pdata == NULL) {
+ printk(KERN_ERR "sh_flctl platform_data not found.\n");
+ return -ENODEV;
+ }
+
+ flctl = kzalloc(sizeof(struct sh_flctl), GFP_KERNEL);
+ if (!flctl) {
+ printk(KERN_ERR "Unable to allocate NAND MTD dev structure.\n");
+ return -ENOMEM;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ printk(KERN_ERR "%s: resource not found.\n", __func__);
+ ret = -ENODEV;
+ goto err;
+ }
+
+ flctl->reg = ioremap(res->start, res->end - res->start + 1);
+ if (flctl->reg == NULL) {
+ printk(KERN_ERR "%s: ioremap error.\n", __func__);
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ platform_set_drvdata(pdev, flctl);
+ flctl_mtd = &flctl->mtd;
+ nand = &flctl->chip;
+ flctl_mtd->priv = nand;
+ flctl->hwecc = pdata->has_hwecc;
+
+ flctl_register_init(flctl, pdata->flcmncr_val);
+
+ nand->options = NAND_NO_AUTOINCR;
+
+ /* Set address of hardware control function */
+ /* 20 us command delay time */
+ nand->chip_delay = 20;
+
+ nand->read_byte = flctl_read_byte;
+ nand->write_buf = flctl_write_buf;
+ nand->read_buf = flctl_read_buf;
+ nand->verify_buf = flctl_verify_buf;
+ nand->select_chip = flctl_select_chip;
+ nand->cmdfunc = flctl_cmdfunc;
+
+ ret = nand_scan_ident(flctl_mtd, 1);
+ if (ret)
+ goto err;
+
+ ret = flctl_chip_init_tail(flctl_mtd);
+ if (ret)
+ goto err;
+
+ ret = nand_scan_tail(flctl_mtd);
+ if (ret)
+ goto err;
+
+ add_mtd_partitions(flctl_mtd, pdata->parts, pdata->nr_parts);
+
+ return 0;
+
+err:
+ kfree(flctl);
+ return ret;
+}
+
+static int __exit flctl_remove(struct platform_device *pdev)
+{
+ struct sh_flctl *flctl = platform_get_drvdata(pdev);
+
+ nand_release(&flctl->mtd);
+ kfree(flctl);
+
+ return 0;
+}
+
+static struct platform_driver flctl_driver = {
+ .probe = flctl_probe,
+ .remove = flctl_remove,
+ .driver = {
+ .name = "sh_flctl",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init flctl_nand_init(void)
+{
+ return platform_driver_register(&flctl_driver);
+}
+
+static void __exit flctl_nand_cleanup(void)
+{
+ platform_driver_unregister(&flctl_driver);
+}
+
+module_init(flctl_nand_init);
+module_exit(flctl_nand_cleanup);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Yoshihiro Shimoda");
+MODULE_DESCRIPTION("SuperH FLCTL driver");
+MODULE_ALIAS("platform:sh_flctl");
diff --git a/drivers/mtd/nand/toto.c b/drivers/mtd/nand/toto.c
deleted file mode 100644
index bbf492e6830..00000000000
--- a/drivers/mtd/nand/toto.c
+++ /dev/null
@@ -1,206 +0,0 @@
-/*
- * drivers/mtd/nand/toto.c
- *
- * Copyright (c) 2003 Texas Instruments
- *
- * Derived from drivers/mtd/autcpu12.c
- *
- * Copyright (c) 2002 Thomas Gleixner <tgxl@linutronix.de>
- *
- * 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.
- *
- * Overview:
- * This is a device driver for the NAND flash device found on the
- * TI fido board. It supports 32MiB and 64MiB cards
- */
-
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/delay.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/nand.h>
-#include <linux/mtd/partitions.h>
-#include <asm/io.h>
-#include <asm/arch/hardware.h>
-#include <asm/sizes.h>
-#include <asm/arch/toto.h>
-#include <asm/arch-omap1510/hardware.h>
-#include <asm/arch/gpio.h>
-
-#define CONFIG_NAND_WORKAROUND 1
-
-/*
- * MTD structure for TOTO board
- */
-static struct mtd_info *toto_mtd = NULL;
-
-static unsigned long toto_io_base = OMAP_FLASH_1_BASE;
-
-/*
- * Define partitions for flash devices
- */
-
-static struct mtd_partition partition_info64M[] = {
- { .name = "toto kernel partition 1",
- .offset = 0,
- .size = 2 * SZ_1M },
- { .name = "toto file sys partition 2",
- .offset = 2 * SZ_1M,
- .size = 14 * SZ_1M },
- { .name = "toto user partition 3",
- .offset = 16 * SZ_1M,
- .size = 16 * SZ_1M },
- { .name = "toto devboard extra partition 4",
- .offset = 32 * SZ_1M,
- .size = 32 * SZ_1M },
-};
-
-static struct mtd_partition partition_info32M[] = {
- { .name = "toto kernel partition 1",
- .offset = 0,
- .size = 2 * SZ_1M },
- { .name = "toto file sys partition 2",
- .offset = 2 * SZ_1M,
- .size = 14 * SZ_1M },
- { .name = "toto user partition 3",
- .offset = 16 * SZ_1M,
- .size = 16 * SZ_1M },
-};
-
-#define NUM_PARTITIONS32M 3
-#define NUM_PARTITIONS64M 4
-
-/*
- * hardware specific access to control-lines
- *
- * ctrl:
- * NAND_NCE: bit 0 -> bit 14 (0x4000)
- * NAND_CLE: bit 1 -> bit 12 (0x1000)
- * NAND_ALE: bit 2 -> bit 1 (0x0002)
- */
-static void toto_hwcontrol(struct mtd_info *mtd, int cmd,
- unsigned int ctrl)
-{
- struct nand_chip *chip = mtd->priv;
-
- if (ctrl & NAND_CTRL_CHANGE) {
- unsigned long bits;
-
- /* hopefully enough time for tc make proceding write to clear */
- udelay(1);
-
- bits = (~ctrl & NAND_NCE) << 14;
- bits |= (ctrl & NAND_CLE) << 12;
- bits |= (ctrl & NAND_ALE) >> 1;
-
-#warning Wild guess as gpiosetout() is nowhere defined in the kernel source - tglx
- gpiosetout(0x5002, bits);
-
-#ifdef CONFIG_NAND_WORKAROUND
- /* "some" dev boards busted, blue wired to rts2 :( */
- rts2setout(2, (ctrl & NAND_CLE) << 1);
-#endif
- /* allow time to ensure gpio state to over take memory write */
- udelay(1);
- }
-
- if (cmd != NAND_CMD_NONE)
- writeb(cmd, chip->IO_ADDR_W);
-}
-
-/*
- * Main initialization routine
- */
-static int __init toto_init(void)
-{
- struct nand_chip *this;
- int err = 0;
-
- /* Allocate memory for MTD device structure and private data */
- toto_mtd = kmalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip), GFP_KERNEL);
- if (!toto_mtd) {
- printk(KERN_WARNING "Unable to allocate toto NAND MTD device structure.\n");
- err = -ENOMEM;
- goto out;
- }
-
- /* Get pointer to private data */
- this = (struct nand_chip *)(&toto_mtd[1]);
-
- /* Initialize structures */
- memset(toto_mtd, 0, sizeof(struct mtd_info));
- memset(this, 0, sizeof(struct nand_chip));
-
- /* Link the private data with the MTD structure */
- toto_mtd->priv = this;
- toto_mtd->owner = THIS_MODULE;
-
- /* Set address of NAND IO lines */
- this->IO_ADDR_R = toto_io_base;
- this->IO_ADDR_W = toto_io_base;
- this->cmd_ctrl = toto_hwcontrol;
- this->dev_ready = NULL;
- /* 25 us command delay time */
- this->chip_delay = 30;
- this->ecc.mode = NAND_ECC_SOFT;
-
- /* Scan to find existance of the device */
- if (nand_scan(toto_mtd, 1)) {
- err = -ENXIO;
- goto out_mtd;
- }
-
- /* Register the partitions */
- switch (toto_mtd->size) {
- case SZ_64M:
- add_mtd_partitions(toto_mtd, partition_info64M, NUM_PARTITIONS64M);
- break;
- case SZ_32M:
- add_mtd_partitions(toto_mtd, partition_info32M, NUM_PARTITIONS32M);
- break;
- default:{
- printk(KERN_WARNING "Unsupported Nand device\n");
- err = -ENXIO;
- goto out_buf;
- }
- }
-
- gpioreserve(NAND_MASK); /* claim our gpios */
- archflashwp(0, 0); /* open up flash for writing */
-
- goto out;
-
- out_mtd:
- kfree(toto_mtd);
- out:
- return err;
-}
-
-module_init(toto_init);
-
-/*
- * Clean up routine
- */
-static void __exit toto_cleanup(void)
-{
- /* Release resources, unregister device */
- nand_release(toto_mtd);
-
- /* Free the MTD device structure */
- kfree(toto_mtd);
-
- /* stop flash writes */
- archflashwp(0, 1);
-
- /* release gpios to system */
- gpiorelease(NAND_MASK);
-}
-
-module_exit(toto_cleanup);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Richard Woodruff <r-woodruff2@ti.com>");
-MODULE_DESCRIPTION("Glue layer for NAND flash on toto board");
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-04 19:44:23 +0000