This patch removes direct reference of gpmc address from generic nand platform
code.
Nand platform code now uses wrapper functions which are implemented in gpmc
module.
Signed-off-by: Sukumar Ghorai <s-gho...@ti.com>
---
arch/arm/mach-omap2/gpmc-nand.c | 39 ++----
arch/arm/plat-omap/include/plat/gpmc.h | 5 -
arch/arm/plat-omap/include/plat/nand.h | 6 +-
drivers/mtd/nand/omap2.c | 225 +++++++++-----------------------
4 files changed, 77 insertions(+), 198 deletions(-)
diff --git a/arch/arm/mach-omap2/gpmc-nand.c b/arch/arm/mach-omap2/gpmc-nand.c
index e57fb29..80f5d94
--- a/arch/arm/mach-omap2/gpmc-nand.c
+++ b/arch/arm/mach-omap2/gpmc-nand.c
@@ -19,8 +19,6 @@
#include <plat/board.h>
#include <plat/gpmc.h>
-#define WR_RD_PIN_MONITORING 0x00600000
-
static struct omap_nand_platform_data *gpmc_nand_data;
static struct resource gpmc_nand_resource = {
@@ -71,10 +69,10 @@ static int omap2_nand_gpmc_retime(void)
t.wr_cycle = gpmc_round_ns_to_ticks(gpmc_nand_data->gpmc_t->wr_cycle);
/* Configure GPMC */
- gpmc_cs_write_reg(gpmc_nand_data->cs, GPMC_CS_CONFIG1,
- GPMC_CONFIG1_DEVICESIZE(gpmc_nand_data->devsize) |
- GPMC_CONFIG1_DEVICETYPE_NAND);
-
+ gpmc_hwcontrol(gpmc_nand_data->cs,
+ GPMC_CONFIG_DEV_SIZE, 1, gpmc_nand_data->devsize, NULL);
+ gpmc_hwcontrol(gpmc_nand_data->cs,
+ GPMC_CONFIG_DEV_TYPE, 1, GPMC_DEVICETYPE_NAND, NULL);
err = gpmc_cs_set_timings(gpmc_nand_data->cs, &t);
if (err)
return err;
@@ -82,27 +80,13 @@ static int omap2_nand_gpmc_retime(void)
return 0;
}
-static int gpmc_nand_setup(void)
-{
- struct device *dev = &gpmc_nand_device.dev;
-
- /* Set timings in GPMC */
- if (omap2_nand_gpmc_retime() < 0) {
- dev_err(dev, "Unable to set gpmc timings\n");
- return -EINVAL;
- }
-
- return 0;
-}
-
int __init gpmc_nand_init(struct omap_nand_platform_data *_nand_data)
{
- unsigned int val;
int err = 0;
struct device *dev = &gpmc_nand_device.dev;
gpmc_nand_data = _nand_data;
- gpmc_nand_data->nand_setup = gpmc_nand_setup;
+ gpmc_nand_data->nand_setup = omap2_nand_gpmc_retime;
gpmc_nand_device.dev.platform_data = gpmc_nand_data;
err = gpmc_cs_request(gpmc_nand_data->cs, NAND_IO_SIZE,
@@ -112,19 +96,17 @@ int __init gpmc_nand_init(struct omap_nand_platform_data
*_nand_data)
return err;
}
- err = gpmc_nand_setup();
+ /* Set timings in GPMC */
+ err = omap2_nand_gpmc_retime();
if (err < 0) {
- dev_err(dev, "NAND platform setup failed: %d\n", err);
+ dev_err(dev, "Unable to set gpmc timings: %d\n", err);
return err;
}
/* Enable RD PIN Monitoring Reg */
if (gpmc_nand_data->dev_ready) {
- val = gpmc_cs_read_reg(gpmc_nand_data->cs,
- GPMC_CS_CONFIG1);
- val |= WR_RD_PIN_MONITORING;
- gpmc_cs_write_reg(gpmc_nand_data->cs,
- GPMC_CS_CONFIG1, val);
+ gpmc_hwcontrol(gpmc_nand_data->cs,
+ GPMC_CONFIG_RDY_BSY, 1, 1, NULL);
}
err = platform_device_register(&gpmc_nand_device);
@@ -140,3 +122,4 @@ out_free_cs:
return err;
}
+
diff --git a/arch/arm/plat-omap/include/plat/gpmc.h
b/arch/arm/plat-omap/include/plat/gpmc.h
index 8a1e9d9..ccbc530
--- a/arch/arm/plat-omap/include/plat/gpmc.h
+++ b/arch/arm/plat-omap/include/plat/gpmc.h
@@ -25,9 +25,6 @@
#define GPMC_CS_NAND_ADDRESS 0x20
#define GPMC_CS_NAND_DATA 0x24
-#define GPMC_CONFIG 0x50
-#define GPMC_STATUS 0x54
-
/* Control Commands */
#define GPMC_CONFIG_WP 0x00000001
#define GPMC_CONFIG_RDY_BSY 0x00000002
@@ -63,7 +60,6 @@
#define GPMC_CONFIG1_DEVICESIZE_16 GPMC_CONFIG1_DEVICESIZE(1)
#define GPMC_CONFIG1_DEVICETYPE(val) ((val & 3) << 10)
#define GPMC_CONFIG1_DEVICETYPE_NOR GPMC_CONFIG1_DEVICETYPE(0)
-#define GPMC_CONFIG1_DEVICETYPE_NAND GPMC_CONFIG1_DEVICETYPE(2)
#define GPMC_CONFIG1_MUXADDDATA (1 << 9)
#define GPMC_CONFIG1_TIME_PARA_GRAN (1 << 4)
#define GPMC_CONFIG1_FCLK_DIV(val) (val & 3)
@@ -133,7 +129,6 @@ extern int gpmc_cs_reserved(int cs);
extern int gpmc_prefetch_enable(int cs, int dma_mode,
unsigned int u32_count, int is_write);
extern int gpmc_prefetch_reset(int cs);
-extern int gpmc_prefetch_status(void);
extern void omap3_gpmc_save_context(void);
extern void omap3_gpmc_restore_context(void);
extern void gpmc_init(void);
diff --git a/arch/arm/plat-omap/include/plat/nand.h
b/arch/arm/plat-omap/include/plat/nand.h
index f8efd54..6562cd0
--- a/arch/arm/plat-omap/include/plat/nand.h
+++ b/arch/arm/plat-omap/include/plat/nand.h
@@ -21,13 +21,11 @@ struct omap_nand_platform_data {
int (*dev_ready)(struct omap_nand_platform_data *);
int dma_channel;
unsigned long phys_base;
- void __iomem *gpmc_cs_baseaddr;
- void __iomem *gpmc_baseaddr;
int devsize;
};
-/* size (4 KiB) for IO mapping */
-#define NAND_IO_SIZE SZ_4K
+/* minimum size for IO mapping */
+#define NAND_IO_SIZE 4
#if defined(CONFIG_MTD_NAND_OMAP2) || defined(CONFIG_MTD_NAND_OMAP2_MODULE)
extern int gpmc_nand_init(struct omap_nand_platform_data *d);
diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c
index ec8eb31..f9fa3cb
--- a/drivers/mtd/nand/omap2.c
+++ b/drivers/mtd/nand/omap2.c
@@ -7,6 +7,7 @@
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
+#define CONFIG_MTD_NAND_OMAP_HWECC
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
@@ -23,20 +24,8 @@
#include <plat/gpmc.h>
#include <plat/nand.h>
-#define GPMC_IRQ_STATUS 0x18
-#define GPMC_ECC_CONFIG 0x1F4
-#define GPMC_ECC_CONTROL 0x1F8
-#define GPMC_ECC_SIZE_CONFIG 0x1FC
-#define GPMC_ECC1_RESULT 0x200
-
#define DRIVER_NAME "omap2-nand"
-#define NAND_WP_OFF 0
-#define NAND_WP_BIT 0x00000010
-
-#define GPMC_BUF_FULL 0x00000001
-#define GPMC_BUF_EMPTY 0x00000000
-
#define NAND_Ecc_P1e (1 << 0)
#define NAND_Ecc_P2e (1 << 1)
#define NAND_Ecc_P4e (1 << 2)
@@ -139,34 +128,11 @@ struct omap_nand_info {
int gpmc_cs;
unsigned long phys_base;
- void __iomem *gpmc_cs_baseaddr;
- void __iomem *gpmc_baseaddr;
- void __iomem *nand_pref_fifo_add;
struct completion comp;
int dma_ch;
};
/**
- * omap_nand_wp - This function enable or disable the Write Protect feature
- * @mtd: MTD device structure
- * @mode: WP ON/OFF
- */
-static void omap_nand_wp(struct mtd_info *mtd, int mode)
-{
- struct omap_nand_info *info = container_of(mtd,
- struct omap_nand_info, mtd);
-
- unsigned long config = __raw_readl(info->gpmc_baseaddr + GPMC_CONFIG);
-
- if (mode)
- config &= ~(NAND_WP_BIT); /* WP is ON */
- else
- config |= (NAND_WP_BIT); /* WP is OFF */
-
- __raw_writel(config, (info->gpmc_baseaddr + GPMC_CONFIG));
-}
-
-/**
* omap_hwcontrol - hardware specific access to control-lines
* @mtd: MTD device structure
* @cmd: command to device
@@ -181,31 +147,20 @@ static void omap_hwcontrol(struct mtd_info *mtd, int cmd,
unsigned int ctrl)
{
struct omap_nand_info *info = container_of(mtd,
struct omap_nand_info, mtd);
- switch (ctrl) {
- case NAND_CTRL_CHANGE | NAND_CTRL_CLE:
- info->nand.IO_ADDR_W = info->gpmc_cs_baseaddr +
- GPMC_CS_NAND_COMMAND;
- info->nand.IO_ADDR_R = info->gpmc_cs_baseaddr +
- GPMC_CS_NAND_DATA;
- break;
-
- case NAND_CTRL_CHANGE | NAND_CTRL_ALE:
- info->nand.IO_ADDR_W = info->gpmc_cs_baseaddr +
- GPMC_CS_NAND_ADDRESS;
- info->nand.IO_ADDR_R = info->gpmc_cs_baseaddr +
- GPMC_CS_NAND_DATA;
- break;
-
- case NAND_CTRL_CHANGE | NAND_NCE:
- info->nand.IO_ADDR_W = info->gpmc_cs_baseaddr +
- GPMC_CS_NAND_DATA;
- info->nand.IO_ADDR_R = info->gpmc_cs_baseaddr +
- GPMC_CS_NAND_DATA;
- break;
- }
- if (cmd != NAND_CMD_NONE)
- __raw_writeb(cmd, info->nand.IO_ADDR_W);
+ if (cmd != NAND_CMD_NONE) {
+ if (ctrl & NAND_CLE)
+ gpmc_hwcontrol(info->gpmc_cs,
+ GPMC_NAND_COMMAND, 1, cmd, NULL);
+
+ else if (ctrl & NAND_ALE)
+ gpmc_hwcontrol(info->gpmc_cs,
+ GPMC_NAND_ADDRESS, 1, cmd, NULL);
+
+ else /* NAND_NCE */
+ gpmc_hwcontrol(info->gpmc_cs,
+ GPMC_NAND_DATA, 1, cmd, NULL);
+ }
}
/**
@@ -232,11 +187,15 @@ static void omap_write_buf8(struct mtd_info *mtd, const
u_char *buf, int len)
struct omap_nand_info *info = container_of(mtd,
struct omap_nand_info, mtd);
u_char *p = (u_char *)buf;
+ u32 status = 0;
while (len--) {
iowrite8(*p++, info->nand.IO_ADDR_W);
- while (GPMC_BUF_EMPTY == (readl(info->gpmc_baseaddr +
- GPMC_STATUS) & GPMC_BUF_FULL));
+ /* wait until buffer is available for write */
+ do {
+ gpmc_hwcontrol(info->gpmc_cs,
+ GPMC_STATUS_BUFFER, 0, 0, &status);
+ } while (!status);
}
}
@@ -264,16 +223,17 @@ static void omap_write_buf16(struct mtd_info *mtd, const
u_char * buf, int len)
struct omap_nand_info *info = container_of(mtd,
struct omap_nand_info, mtd);
u16 *p = (u16 *) buf;
-
+ u32 status = 0;
/* FIXME try bursts of writesw() or DMA ... */
len >>= 1;
while (len--) {
iowrite16(*p++, info->nand.IO_ADDR_W);
-
- while (GPMC_BUF_EMPTY == (readl(info->gpmc_baseaddr +
- GPMC_STATUS) & GPMC_BUF_FULL))
- ;
+ /* wait until buffer is available for write */
+ do {
+ gpmc_hwcontrol(info->gpmc_cs,
+ GPMC_STATUS_BUFFER, 0, 0, &status);
+ } while (!status);
}
}
@@ -287,7 +247,7 @@ static void omap_read_buf_pref(struct mtd_info *mtd, u_char
*buf, int len)
{
struct omap_nand_info *info = container_of(mtd,
struct omap_nand_info, mtd);
- uint32_t pfpw_status = 0, r_count = 0;
+ uint32_t r_count = 0;
int ret = 0;
u32 *p = (u32 *)buf;
@@ -310,14 +270,15 @@ static void omap_read_buf_pref(struct mtd_info *mtd,
u_char *buf, int len)
else
omap_read_buf8(mtd, buf, len);
} else {
+ p = (u32 *) buf;
do {
- pfpw_status = gpmc_prefetch_status();
- r_count = ((pfpw_status >> 24) & 0x7F) >> 2;
- ioread32_rep(info->nand_pref_fifo_add, p, r_count);
+ gpmc_hwcontrol(info->gpmc_cs,
+ GPMC_PREFETCH_FIFO_CNT, 0, 0, &r_count);
+ r_count = r_count >> 2;
+ ioread32_rep(info->nand.IO_ADDR_R, p, r_count);
p += r_count;
len -= r_count << 2;
} while (len);
-
/* disable and stop the PFPW engine */
gpmc_prefetch_reset(info->gpmc_cs);
}
@@ -334,13 +295,13 @@ static void omap_write_buf_pref(struct mtd_info *mtd,
{
struct omap_nand_info *info = container_of(mtd,
struct omap_nand_info, mtd);
- uint32_t pfpw_status = 0, w_count = 0;
+ uint32_t pref_count = 0, w_count = 0;
int i = 0, ret = 0;
- u16 *p = (u16 *) buf;
+ u16 *p;
/* take care of subpage writes */
if (len % 2 != 0) {
- writeb(*buf, info->nand.IO_ADDR_R);
+ writeb(*buf, info->nand.IO_ADDR_W);
p = (u16 *)(buf + 1);
len--;
}
@@ -354,14 +315,19 @@ static void omap_write_buf_pref(struct mtd_info *mtd,
else
omap_write_buf8(mtd, buf, len);
} else {
- pfpw_status = gpmc_prefetch_status();
- while (pfpw_status & 0x3FFF) {
- w_count = ((pfpw_status >> 24) & 0x7F) >> 1;
+ p = (u16 *) buf;
+ while (len) {
+ gpmc_hwcontrol(info->gpmc_cs,
+ GPMC_PREFETCH_FIFO_CNT, 0, 0, &w_count);
+ w_count = w_count >> 1;
for (i = 0; (i < w_count) && len; i++, len -= 2)
- iowrite16(*p++, info->nand_pref_fifo_add);
- pfpw_status = gpmc_prefetch_status();
+ iowrite16(*p++, info->nand.IO_ADDR_W);
}
-
+ /* wait for data to flushed-out before reset the prefetch */
+ do {
+ gpmc_hwcontrol(info->gpmc_cs,
+ GPMC_PREFETCH_COUNT, 0, 0, &pref_count);
+ } while (pref_count);
/* disable and stop the PFPW engine */
gpmc_prefetch_reset(info->gpmc_cs);
}
@@ -451,8 +417,10 @@ static inline int omap_nand_dma_transfer(struct mtd_info
*mtd, void *addr,
/* setup and start DMA using dma_addr */
wait_for_completion(&info->comp);
- while (0x3fff & (prefetch_status = gpmc_prefetch_status()))
- ;
+ do {
+ gpmc_hwcontrol(info->gpmc_cs,
+ GPMC_PREFETCH_COUNT, 0, 0, &prefetch_status);
+ } while (prefetch_status);
/* disable and stop the PFPW engine */
gpmc_prefetch_reset();
@@ -530,29 +498,6 @@ static int omap_verify_buf(struct mtd_info *mtd, const
u_char * buf, int len)
}
#ifdef CONFIG_MTD_NAND_OMAP_HWECC
-/**
- * omap_hwecc_init - Initialize the HW ECC for NAND flash in GPMC controller
- * @mtd: MTD device structure
- */
-static void omap_hwecc_init(struct mtd_info *mtd)
-{
- struct omap_nand_info *info = container_of(mtd, struct omap_nand_info,
- mtd);
- struct nand_chip *chip = mtd->priv;
- unsigned long val = 0x0;
-
- /* Read from ECC Control Register */
- val = __raw_readl(info->gpmc_baseaddr + GPMC_ECC_CONTROL);
- /* Clear all ECC | Enable Reg1 */
- val = ((0x00000001<<8) | 0x00000001);
- __raw_writel(val, info->gpmc_baseaddr + GPMC_ECC_CONTROL);
-
- /* Read from ECC Size Config Register */
- val = __raw_readl(info->gpmc_baseaddr + GPMC_ECC_SIZE_CONFIG);
- /* ECCSIZE1=512 | Select eccResultsize[0-3] */
- val = ((((chip->ecc.size >> 1) - 1) << 22) | (0x0000000F));
- __raw_writel(val, info->gpmc_baseaddr + GPMC_ECC_SIZE_CONFIG);
-}
/**
* gen_true_ecc - This function will generate true ECC value
@@ -755,19 +700,7 @@ static int omap_calculate_ecc(struct mtd_info *mtd, const
u_char *dat,
{
struct omap_nand_info *info = container_of(mtd, struct omap_nand_info,
mtd);
- unsigned long val = 0x0;
- unsigned long reg;
-
- /* Start Reading from HW ECC1_Result = 0x200 */
- reg = (unsigned long)(info->gpmc_baseaddr + GPMC_ECC1_RESULT);
- val = __raw_readl(reg);
- *ecc_code++ = val; /* P128e, ..., P1e */
- *ecc_code++ = val >> 16; /* P128o, ..., P1o */
- /* P2048o, P1024o, P512o, P256o, P2048e, P1024e, P512e, P256e */
- *ecc_code++ = ((val >> 8) & 0x0f) | ((val >> 20) & 0xf0);
- reg += 4;
-
- return 0;
+ return gpmc_calculate_ecc(info->gpmc_cs, dat, ecc_code);
}
/**
@@ -781,32 +714,10 @@ static void omap_enable_hwecc(struct mtd_info *mtd, int
mode)
mtd);
struct nand_chip *chip = mtd->priv;
unsigned int dev_width = (chip->options & NAND_BUSWIDTH_16) ? 1 : 0;
- unsigned long val = __raw_readl(info->gpmc_baseaddr + GPMC_ECC_CONFIG);
-
- switch (mode) {
- case NAND_ECC_READ:
- __raw_writel(0x101, info->gpmc_baseaddr + GPMC_ECC_CONTROL);
- /* (ECC 16 or 8 bit col) | ( CS ) | ECC Enable */
- val = (dev_width << 7) | (info->gpmc_cs << 1) | (0x1);
- break;
- case NAND_ECC_READSYN:
- __raw_writel(0x100, info->gpmc_baseaddr + GPMC_ECC_CONTROL);
- /* (ECC 16 or 8 bit col) | ( CS ) | ECC Enable */
- val = (dev_width << 7) | (info->gpmc_cs << 1) | (0x1);
- break;
- case NAND_ECC_WRITE:
- __raw_writel(0x101, info->gpmc_baseaddr + GPMC_ECC_CONTROL);
- /* (ECC 16 or 8 bit col) | ( CS ) | ECC Enable */
- val = (dev_width << 7) | (info->gpmc_cs << 1) | (0x1);
- break;
- default:
- DEBUG(MTD_DEBUG_LEVEL0, "Error: Unrecognized Mode[%d]!\n",
- mode);
- break;
- }
- __raw_writel(val, info->gpmc_baseaddr + GPMC_ECC_CONFIG);
+ gpmc_enable_hwecc(info->gpmc_cs, mode, dev_width, info->nand.ecc.size);
}
+
#endif
/**
@@ -834,14 +745,10 @@ static int omap_wait(struct mtd_info *mtd, struct
nand_chip *chip)
else
timeo += (HZ * 20) / 1000;
- this->IO_ADDR_W = (void *) info->gpmc_cs_baseaddr +
- GPMC_CS_NAND_COMMAND;
- this->IO_ADDR_R = (void *) info->gpmc_cs_baseaddr + GPMC_CS_NAND_DATA;
-
- __raw_writeb(NAND_CMD_STATUS & 0xFF, this->IO_ADDR_W);
-
+ gpmc_hwcontrol(info->gpmc_cs,
+ GPMC_NAND_COMMAND, 1, (NAND_CMD_STATUS & 0xFF), NULL);
while (time_before(jiffies, timeo)) {
- status = __raw_readb(this->IO_ADDR_R);
+ gpmc_hwcontrol(info->gpmc_cs, GPMC_NAND_DATA, 0, 0, &status);
if (status & NAND_STATUS_READY)
break;
cond_resched();
@@ -855,22 +762,24 @@ static int omap_wait(struct mtd_info *mtd, struct
nand_chip *chip)
*/
static int omap_dev_ready(struct mtd_info *mtd)
{
+ unsigned int val = 0;
struct omap_nand_info *info = container_of(mtd, struct omap_nand_info,
mtd);
- unsigned int val = __raw_readl(info->gpmc_baseaddr + GPMC_IRQ_STATUS);
+ gpmc_hwcontrol(info->gpmc_cs, GPMC_GET_SET_IRQ_STATUS, 0, 0, &val);
if ((val & 0x100) == 0x100) {
/* Clear IRQ Interrupt */
val |= 0x100;
val &= ~(0x0);
- __raw_writel(val, info->gpmc_baseaddr + GPMC_IRQ_STATUS);
+ gpmc_hwcontrol(info->gpmc_cs,
+ GPMC_GET_SET_IRQ_STATUS, 1, val, NULL);
} else {
unsigned int cnt = 0;
while (cnt++ < 0x1FF) {
if ((val & 0x100) == 0x100)
return 0;
- val = __raw_readl(info->gpmc_baseaddr +
- GPMC_IRQ_STATUS);
+ gpmc_hwcontrol(info->gpmc_cs,
+ GPMC_GET_SET_IRQ_STATUS, 0, 0, &val);
}
}
@@ -901,8 +810,6 @@ static int __devinit omap_nand_probe(struct platform_device
*pdev)
info->pdev = pdev;
info->gpmc_cs = pdata->cs;
- info->gpmc_baseaddr = pdata->gpmc_baseaddr;
- info->gpmc_cs_baseaddr = pdata->gpmc_cs_baseaddr;
info->phys_base = pdata->phys_base;
info->mtd.priv = &info->nand;
@@ -913,7 +820,7 @@ static int __devinit omap_nand_probe(struct platform_device
*pdev)
info->nand.options |= NAND_SKIP_BBTSCAN;
/* NAND write protect off */
- omap_nand_wp(&info->mtd, NAND_WP_OFF);
+ gpmc_hwcontrol(info->gpmc_cs, GPMC_CONFIG_WP, 1, 0, NULL);
if (!request_mem_region(info->phys_base, NAND_IO_SIZE,
pdev->dev.driver->name)) {
@@ -948,8 +855,6 @@ static int __devinit omap_nand_probe(struct platform_device
*pdev)
}
if (use_prefetch) {
- /* copy the virtual address of nand base for fifo access */
- info->nand_pref_fifo_add = info->nand.IO_ADDR_R;
info->nand.read_buf = omap_read_buf_pref;
info->nand.write_buf = omap_write_buf_pref;
@@ -989,8 +894,6 @@ static int __devinit omap_nand_probe(struct platform_device
*pdev)
info->nand.ecc.correct = omap_correct_data;
info->nand.ecc.mode = NAND_ECC_HW;
- /* init HW ECC */
- omap_hwecc_init(&info->mtd);
#else
info->nand.ecc.mode = NAND_ECC_SOFT;
#endif
@@ -1040,7 +943,7 @@ static int omap_nand_remove(struct platform_device *pdev)
/* Release NAND device, its internal structures and partitions */
nand_release(&info->mtd);
- iounmap(info->nand_pref_fifo_add);
+ iounmap(info->nand.IO_ADDR_R);
kfree(&info->mtd);
return 0;
}
--
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