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Diffstat (limited to 'drivers/mtd/nand')
-rw-r--r--drivers/mtd/nand/omap2.c206
1 files changed, 161 insertions, 45 deletions
diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c
index ac4fd756eda3..52fc089d5bcb 100644
--- a/drivers/mtd/nand/omap2.c
+++ b/drivers/mtd/nand/omap2.c
@@ -101,6 +101,16 @@
#define P4e_s(a) (TF(a & NAND_Ecc_P4e) << 0)
#define P4o_s(a) (TF(a & NAND_Ecc_P4o) << 1)
+#define PREFETCH_CONFIG1_CS_SHIFT 24
+#define ECC_CONFIG_CS_SHIFT 1
+#define CS_MASK 0x7
+#define ENABLE_PREFETCH (0x1 << 7)
+#define DMA_MPU_MODE_SHIFT 2
+#define ECCSIZE1_SHIFT 22
+#define ECC1RESULTSIZE 0x1
+#define ECCCLEAR 0x100
+#define ECC1 0x1
+
/* oob info generated runtime depending on ecc algorithm and layout selected */
static struct nand_ecclayout omap_oobinfo;
/* Define some generic bad / good block scan pattern which are used
@@ -133,6 +143,7 @@ struct omap_nand_info {
} iomode;
u_char *buf;
int buf_len;
+ struct gpmc_nand_regs reg;
#ifdef CONFIG_MTD_NAND_OMAP_BCH
struct bch_control *bch;
@@ -141,6 +152,63 @@ struct omap_nand_info {
};
/**
+ * omap_prefetch_enable - configures and starts prefetch transfer
+ * @cs: cs (chip select) number
+ * @fifo_th: fifo threshold to be used for read/ write
+ * @dma_mode: dma mode enable (1) or disable (0)
+ * @u32_count: number of bytes to be transferred
+ * @is_write: prefetch read(0) or write post(1) mode
+ */
+static int omap_prefetch_enable(int cs, int fifo_th, int dma_mode,
+ unsigned int u32_count, int is_write, struct omap_nand_info *info)
+{
+ u32 val;
+
+ if (fifo_th > PREFETCH_FIFOTHRESHOLD_MAX)
+ return -1;
+
+ if (readl(info->reg.gpmc_prefetch_control))
+ return -EBUSY;
+
+ /* Set the amount of bytes to be prefetched */
+ writel(u32_count, info->reg.gpmc_prefetch_config2);
+
+ /* Set dma/mpu mode, the prefetch read / post write and
+ * enable the engine. Set which cs is has requested for.
+ */
+ val = ((cs << PREFETCH_CONFIG1_CS_SHIFT) |
+ PREFETCH_FIFOTHRESHOLD(fifo_th) | ENABLE_PREFETCH |
+ (dma_mode << DMA_MPU_MODE_SHIFT) | (0x1 & is_write));
+ writel(val, info->reg.gpmc_prefetch_config1);
+
+ /* Start the prefetch engine */
+ writel(0x1, info->reg.gpmc_prefetch_control);
+
+ return 0;
+}
+
+/**
+ * omap_prefetch_reset - disables and stops the prefetch engine
+ */
+static int omap_prefetch_reset(int cs, struct omap_nand_info *info)
+{
+ u32 config1;
+
+ /* check if the same module/cs is trying to reset */
+ config1 = readl(info->reg.gpmc_prefetch_config1);
+ if (((config1 >> PREFETCH_CONFIG1_CS_SHIFT) & CS_MASK) != cs)
+ return -EINVAL;
+
+ /* Stop the PFPW engine */
+ writel(0x0, info->reg.gpmc_prefetch_control);
+
+ /* Reset/disable the PFPW engine */
+ writel(0x0, info->reg.gpmc_prefetch_config1);
+
+ return 0;
+}
+
+/**
* omap_hwcontrol - hardware specific access to control-lines
* @mtd: MTD device structure
* @cmd: command to device
@@ -158,13 +226,13 @@ static void omap_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
if (cmd != NAND_CMD_NONE) {
if (ctrl & NAND_CLE)
- gpmc_nand_write(info->gpmc_cs, GPMC_NAND_COMMAND, cmd);
+ writeb(cmd, info->reg.gpmc_nand_command);
else if (ctrl & NAND_ALE)
- gpmc_nand_write(info->gpmc_cs, GPMC_NAND_ADDRESS, cmd);
+ writeb(cmd, info->reg.gpmc_nand_address);
else /* NAND_NCE */
- gpmc_nand_write(info->gpmc_cs, GPMC_NAND_DATA, cmd);
+ writeb(cmd, info->reg.gpmc_nand_data);
}
}
@@ -198,7 +266,8 @@ static void omap_write_buf8(struct mtd_info *mtd, const u_char *buf, int len)
iowrite8(*p++, info->nand.IO_ADDR_W);
/* wait until buffer is available for write */
do {
- status = gpmc_read_status(GPMC_STATUS_BUFFER);
+ status = readl(info->reg.gpmc_status) &
+ GPMC_STATUS_BUFF_EMPTY;
} while (!status);
}
}
@@ -235,7 +304,8 @@ static void omap_write_buf16(struct mtd_info *mtd, const u_char * buf, int len)
iowrite16(*p++, info->nand.IO_ADDR_W);
/* wait until buffer is available for write */
do {
- status = gpmc_read_status(GPMC_STATUS_BUFFER);
+ status = readl(info->reg.gpmc_status) &
+ GPMC_STATUS_BUFF_EMPTY;
} while (!status);
}
}
@@ -265,8 +335,8 @@ static void omap_read_buf_pref(struct mtd_info *mtd, u_char *buf, int len)
}
/* configure and start prefetch transfer */
- ret = gpmc_prefetch_enable(info->gpmc_cs,
- PREFETCH_FIFOTHRESHOLD_MAX, 0x0, len, 0x0);
+ ret = omap_prefetch_enable(info->gpmc_cs,
+ PREFETCH_FIFOTHRESHOLD_MAX, 0x0, len, 0x0, info);
if (ret) {
/* PFPW engine is busy, use cpu copy method */
if (info->nand.options & NAND_BUSWIDTH_16)
@@ -275,14 +345,15 @@ static void omap_read_buf_pref(struct mtd_info *mtd, u_char *buf, int len)
omap_read_buf8(mtd, (u_char *)p, len);
} else {
do {
- r_count = gpmc_read_status(GPMC_PREFETCH_FIFO_CNT);
+ r_count = readl(info->reg.gpmc_prefetch_status);
+ r_count = GPMC_PREFETCH_STATUS_FIFO_CNT(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);
+ omap_prefetch_reset(info->gpmc_cs, info);
}
}
@@ -301,6 +372,7 @@ static void omap_write_buf_pref(struct mtd_info *mtd,
int i = 0, ret = 0;
u16 *p = (u16 *)buf;
unsigned long tim, limit;
+ u32 val;
/* take care of subpage writes */
if (len % 2 != 0) {
@@ -310,8 +382,8 @@ static void omap_write_buf_pref(struct mtd_info *mtd,
}
/* configure and start prefetch transfer */
- ret = gpmc_prefetch_enable(info->gpmc_cs,
- PREFETCH_FIFOTHRESHOLD_MAX, 0x0, len, 0x1);
+ ret = omap_prefetch_enable(info->gpmc_cs,
+ PREFETCH_FIFOTHRESHOLD_MAX, 0x0, len, 0x1, info);
if (ret) {
/* PFPW engine is busy, use cpu copy method */
if (info->nand.options & NAND_BUSWIDTH_16)
@@ -320,7 +392,8 @@ static void omap_write_buf_pref(struct mtd_info *mtd,
omap_write_buf8(mtd, (u_char *)p, len);
} else {
while (len) {
- w_count = gpmc_read_status(GPMC_PREFETCH_FIFO_CNT);
+ w_count = readl(info->reg.gpmc_prefetch_status);
+ w_count = GPMC_PREFETCH_STATUS_FIFO_CNT(w_count);
w_count = w_count >> 1;
for (i = 0; (i < w_count) && len; i++, len -= 2)
iowrite16(*p++, info->nand.IO_ADDR_W);
@@ -329,11 +402,14 @@ static void omap_write_buf_pref(struct mtd_info *mtd,
tim = 0;
limit = (loops_per_jiffy *
msecs_to_jiffies(OMAP_NAND_TIMEOUT_MS));
- while (gpmc_read_status(GPMC_PREFETCH_COUNT) && (tim++ < limit))
+ do {
cpu_relax();
+ val = readl(info->reg.gpmc_prefetch_status);
+ val = GPMC_PREFETCH_STATUS_COUNT(val);
+ } while (val && (tim++ < limit));
/* disable and stop the PFPW engine */
- gpmc_prefetch_reset(info->gpmc_cs);
+ omap_prefetch_reset(info->gpmc_cs, info);
}
}
@@ -365,6 +441,7 @@ static inline int omap_nand_dma_transfer(struct mtd_info *mtd, void *addr,
unsigned long tim, limit;
unsigned n;
int ret;
+ u32 val;
if (addr >= high_memory) {
struct page *p1;
@@ -396,9 +473,9 @@ static inline int omap_nand_dma_transfer(struct mtd_info *mtd, void *addr,
tx->callback_param = &info->comp;
dmaengine_submit(tx);
- /* configure and start prefetch transfer */
- ret = gpmc_prefetch_enable(info->gpmc_cs,
- PREFETCH_FIFOTHRESHOLD_MAX, 0x1, len, is_write);
+ /* configure and start prefetch transfer */
+ ret = omap_prefetch_enable(info->gpmc_cs,
+ PREFETCH_FIFOTHRESHOLD_MAX, 0x1, len, is_write, info);
if (ret)
/* PFPW engine is busy, use cpu copy method */
goto out_copy_unmap;
@@ -410,11 +487,15 @@ static inline int omap_nand_dma_transfer(struct mtd_info *mtd, void *addr,
wait_for_completion(&info->comp);
tim = 0;
limit = (loops_per_jiffy * msecs_to_jiffies(OMAP_NAND_TIMEOUT_MS));
- while (gpmc_read_status(GPMC_PREFETCH_COUNT) && (tim++ < limit))
+
+ do {
cpu_relax();
+ val = readl(info->reg.gpmc_prefetch_status);
+ val = GPMC_PREFETCH_STATUS_COUNT(val);
+ } while (val && (tim++ < limit));
/* disable and stop the PFPW engine */
- gpmc_prefetch_reset(info->gpmc_cs);
+ omap_prefetch_reset(info->gpmc_cs, info);
dma_unmap_sg(info->dma->device->dev, &sg, 1, dir);
return 0;
@@ -474,7 +555,8 @@ static irqreturn_t omap_nand_irq(int this_irq, void *dev)
u32 irq_stat;
irq_stat = gpmc_read_status(GPMC_GET_IRQ_STATUS);
- bytes = gpmc_read_status(GPMC_PREFETCH_FIFO_CNT);
+ bytes = readl(info->reg.gpmc_prefetch_status);
+ bytes = GPMC_PREFETCH_STATUS_FIFO_CNT(bytes);
bytes = bytes & 0xFFFC; /* io in multiple of 4 bytes */
if (info->iomode == OMAP_NAND_IO_WRITE) { /* checks for write io */
if (irq_stat & 0x2)
@@ -534,8 +616,8 @@ static void omap_read_buf_irq_pref(struct mtd_info *mtd, u_char *buf, int len)
init_completion(&info->comp);
/* configure and start prefetch transfer */
- ret = gpmc_prefetch_enable(info->gpmc_cs,
- PREFETCH_FIFOTHRESHOLD_MAX/2, 0x0, len, 0x0);
+ ret = omap_prefetch_enable(info->gpmc_cs,
+ PREFETCH_FIFOTHRESHOLD_MAX/2, 0x0, len, 0x0, info);
if (ret)
/* PFPW engine is busy, use cpu copy method */
goto out_copy;
@@ -549,7 +631,7 @@ static void omap_read_buf_irq_pref(struct mtd_info *mtd, u_char *buf, int len)
wait_for_completion(&info->comp);
/* disable and stop the PFPW engine */
- gpmc_prefetch_reset(info->gpmc_cs);
+ omap_prefetch_reset(info->gpmc_cs, info);
return;
out_copy:
@@ -572,6 +654,7 @@ static void omap_write_buf_irq_pref(struct mtd_info *mtd,
struct omap_nand_info, mtd);
int ret = 0;
unsigned long tim, limit;
+ u32 val;
if (len <= mtd->oobsize) {
omap_write_buf_pref(mtd, buf, len);
@@ -583,8 +666,8 @@ static void omap_write_buf_irq_pref(struct mtd_info *mtd,
init_completion(&info->comp);
/* configure and start prefetch transfer : size=24 */
- ret = gpmc_prefetch_enable(info->gpmc_cs,
- (PREFETCH_FIFOTHRESHOLD_MAX * 3) / 8, 0x0, len, 0x1);
+ ret = omap_prefetch_enable(info->gpmc_cs,
+ (PREFETCH_FIFOTHRESHOLD_MAX * 3) / 8, 0x0, len, 0x1, info);
if (ret)
/* PFPW engine is busy, use cpu copy method */
goto out_copy;
@@ -599,11 +682,14 @@ static void omap_write_buf_irq_pref(struct mtd_info *mtd,
/* wait for data to flushed-out before reset the prefetch */
tim = 0;
limit = (loops_per_jiffy * msecs_to_jiffies(OMAP_NAND_TIMEOUT_MS));
- while (gpmc_read_status(GPMC_PREFETCH_COUNT) && (tim++ < limit))
+ do {
+ val = readl(info->reg.gpmc_prefetch_status);
+ val = GPMC_PREFETCH_STATUS_COUNT(val);
cpu_relax();
+ } while (val && (tim++ < limit));
/* disable and stop the PFPW engine */
- gpmc_prefetch_reset(info->gpmc_cs);
+ omap_prefetch_reset(info->gpmc_cs, info);
return;
out_copy:
@@ -843,7 +929,20 @@ 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);
- return gpmc_calculate_ecc(info->gpmc_cs, dat, ecc_code);
+ u32 val;
+
+ val = readl(info->reg.gpmc_ecc_config);
+ if (((val >> ECC_CONFIG_CS_SHIFT) & ~CS_MASK) != info->gpmc_cs)
+ return -EINVAL;
+
+ /* read ecc result */
+ val = readl(info->reg.gpmc_ecc1_result);
+ *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);
+
+ return 0;
}
/**
@@ -857,8 +956,34 @@ 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;
+ u32 val;
- gpmc_enable_hwecc(info->gpmc_cs, mode, dev_width, info->nand.ecc.size);
+ /* clear ecc and enable bits */
+ val = ECCCLEAR | ECC1;
+ writel(val, info->reg.gpmc_ecc_control);
+
+ /* program ecc and result sizes */
+ val = ((((info->nand.ecc.size >> 1) - 1) << ECCSIZE1_SHIFT) |
+ ECC1RESULTSIZE);
+ writel(val, info->reg.gpmc_ecc_size_config);
+
+ switch (mode) {
+ case NAND_ECC_READ:
+ case NAND_ECC_WRITE:
+ writel(ECCCLEAR | ECC1, info->reg.gpmc_ecc_control);
+ break;
+ case NAND_ECC_READSYN:
+ writel(ECCCLEAR, info->reg.gpmc_ecc_control);
+ break;
+ default:
+ dev_info(&info->pdev->dev,
+ "error: unrecognized Mode[%d]!\n", mode);
+ break;
+ }
+
+ /* (ECC 16 or 8 bit col) | ( CS ) | ECC Enable */
+ val = (dev_width << 7) | (info->gpmc_cs << 1) | (0x1);
+ writel(val, info->reg.gpmc_ecc_config);
}
/**
@@ -886,10 +1011,9 @@ static int omap_wait(struct mtd_info *mtd, struct nand_chip *chip)
else
timeo += (HZ * 20) / 1000;
- gpmc_nand_write(info->gpmc_cs,
- GPMC_NAND_COMMAND, (NAND_CMD_STATUS & 0xFF));
+ writeb(NAND_CMD_STATUS & 0xFF, info->reg.gpmc_nand_command);
while (time_before(jiffies, timeo)) {
- status = gpmc_nand_read(info->gpmc_cs, GPMC_NAND_DATA);
+ status = readb(info->reg.gpmc_nand_data);
if (status & NAND_STATUS_READY)
break;
cond_resched();
@@ -909,22 +1033,13 @@ static int omap_dev_ready(struct mtd_info *mtd)
struct omap_nand_info *info = container_of(mtd, struct omap_nand_info,
mtd);
- val = gpmc_read_status(GPMC_GET_IRQ_STATUS);
+ val = readl(info->reg.gpmc_status);
+
if ((val & 0x100) == 0x100) {
- /* Clear IRQ Interrupt */
- val |= 0x100;
- val &= ~(0x0);
- gpmc_cs_configure(info->gpmc_cs, GPMC_SET_IRQ_STATUS, val);
+ return 1;
} else {
- unsigned int cnt = 0;
- while (cnt++ < 0x1FF) {
- if ((val & 0x100) == 0x100)
- return 0;
- val = gpmc_read_status(GPMC_GET_IRQ_STATUS);
- }
+ return 0;
}
-
- return 1;
}
#ifdef CONFIG_MTD_NAND_OMAP_BCH
@@ -1175,6 +1290,7 @@ static int __devinit omap_nand_probe(struct platform_device *pdev)
info->gpmc_cs = pdata->cs;
info->phys_base = pdata->phys_base;
+ info->reg = pdata->reg;
info->mtd.priv = &info->nand;
info->mtd.name = dev_name(&pdev->dev);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-14 04:34:31 +0000