* 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>
#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)
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
{
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_nand_write(info->gpmc_cs, GPMC_NAND_COMMAND, cmd);
+
+ else if (ctrl & NAND_ALE)
+ gpmc_nand_write(info->gpmc_cs, GPMC_NAND_ADDRESS, cmd);
+
+ else /* NAND_NCE */
+ gpmc_nand_write(info->gpmc_cs, GPMC_NAND_DATA, cmd);
+ }
}
/**
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 {
+ status = gpmc_read_status(GPMC_STATUS_BUFFER);
+ } while (!status);
}
}
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 {
+ status = gpmc_read_status(GPMC_STATUS_BUFFER);
+ } while (!status);
}
}
{
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;
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);
+ r_count = gpmc_read_status(GPMC_PREFETCH_FIFO_CNT);
+ 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);
}
{
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--;
}
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) {
+ w_count = gpmc_read_status(GPMC_PREFETCH_FIFO_CNT);
+ 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 {
+ pref_count = gpmc_read_status(GPMC_PREFETCH_COUNT);
+ } while (pref_count);
/* disable and stop the PFPW engine */
gpmc_prefetch_reset(info->gpmc_cs);
}
/* setup and start DMA using dma_addr */
wait_for_completion(&info->comp);
- while (0x3fff & (prefetch_status = gpmc_prefetch_status()))
- ;
+ do {
+ prefetch_status = gpmc_read_status(GPMC_PREFETCH_COUNT);
+ } while (prefetch_status);
/* disable and stop the PFPW engine */
gpmc_prefetch_reset();
}
#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
{
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);
}
/**
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
/**
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_nand_write(info->gpmc_cs,
+ GPMC_NAND_COMMAND, (NAND_CMD_STATUS & 0xFF));
while (time_before(jiffies, timeo)) {
- status = __raw_readb(this->IO_ADDR_R);
+ status = gpmc_nand_read(info->gpmc_cs, GPMC_NAND_DATA);
if (status & NAND_STATUS_READY)
break;
cond_resched();
*/
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);
+ val = gpmc_read_status(GPMC_GET_IRQ_STATUS);
if ((val & 0x100) == 0x100) {
/* Clear IRQ Interrupt */
val |= 0x100;
val &= ~(0x0);
- __raw_writel(val, info->gpmc_baseaddr + GPMC_IRQ_STATUS);
+ gpmc_cs_configure(info->gpmc_cs, GPMC_SET_IRQ_STATUS, val);
} else {
unsigned int cnt = 0;
while (cnt++ < 0x1FF) {
if ((val & 0x100) == 0x100)
return 0;
- val = __raw_readl(info->gpmc_baseaddr +
- GPMC_IRQ_STATUS);
+ val = gpmc_read_status(GPMC_GET_IRQ_STATUS);
}
}
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;
info->nand.options |= NAND_SKIP_BBTSCAN;
/* NAND write protect off */
- omap_nand_wp(&info->mtd, NAND_WP_OFF);
+ gpmc_cs_configure(info->gpmc_cs, GPMC_CONFIG_WP, 0);
if (!request_mem_region(info->phys_base, NAND_IO_SIZE,
pdev->dev.driver->name)) {
}
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;
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
/* 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;
}
git://bbs.cooldavid.org / net-next-2.6.git / commitdiff