#define READ_ID_BYTES 7
/* macros for registers read/write */
-#define nand_writel(info, off, val) \
- writel_relaxed((val), (info)->mmio_base + (off))
-
-#define nand_readl(info, off) \
- readl_relaxed((info)->mmio_base + (off))
+#define nand_writel(info, off, val) \
+ do { \
+ dev_vdbg(&info->pdev->dev, \
+ "%s():%d nand_writel(0x%x, 0x%04x)\n", \
+ __func__, __LINE__, (val), (off)); \
+ writel_relaxed((val), (info)->mmio_base + (off)); \
+ } while (0)
+
+#define nand_readl(info, off) \
+ ({ \
+ unsigned int _v; \
+ _v = readl_relaxed((info)->mmio_base + (off)); \
+ dev_vdbg(&info->pdev->dev, \
+ "%s():%d nand_readl(0x%04x) = 0x%x\n", \
+ __func__, __LINE__, (off), _v); \
+ _v; \
+ })
/* error code and state */
enum {
struct dma_chan *dma_chan;
dma_cookie_t dma_cookie;
int drcmr_dat;
- int drcmr_cmd;
unsigned char *data_buff;
unsigned char *oob_buff;
int use_spare; /* use spare ? */
int need_wait;
- unsigned int data_size; /* data to be read from FIFO */
- unsigned int chunk_size; /* split commands chunk size */
- unsigned int oob_size;
+ /* Amount of real data per full chunk */
+ unsigned int chunk_size;
+
+ /* Amount of spare data per full chunk */
unsigned int spare_size;
+
+ /* Number of full chunks (i.e chunk_size + spare_size) */
+ unsigned int nfullchunks;
+
+ /*
+ * Total number of chunks. If equal to nfullchunks, then there
+ * are only full chunks. Otherwise, there is one last chunk of
+ * size (last_chunk_size + last_spare_size)
+ */
+ unsigned int ntotalchunks;
+
+ /* Amount of real data in the last chunk */
+ unsigned int last_chunk_size;
+
+ /* Amount of spare data in the last chunk */
+ unsigned int last_spare_size;
+
unsigned int ecc_size;
unsigned int ecc_err_cnt;
unsigned int max_bitflips;
int retcode;
+ /*
+ * Variables only valid during command
+ * execution. step_chunk_size and step_spare_size is the
+ * amount of real data and spare data in the current
+ * chunk. cur_chunk is the current chunk being
+ * read/programmed.
+ */
+ unsigned int step_chunk_size;
+ unsigned int step_spare_size;
+ unsigned int cur_chunk;
+
/* cached register value */
uint32_t reg_ndcr;
uint32_t ndtr0cs0;
return 0;
}
-/*
- * Set the data and OOB size, depending on the selected
- * spare and ECC configuration.
- * Only applicable to READ0, READOOB and PAGEPROG commands.
- */
-static void pxa3xx_set_datasize(struct pxa3xx_nand_info *info,
- struct mtd_info *mtd)
-{
- int oob_enable = info->reg_ndcr & NDCR_SPARE_EN;
-
- info->data_size = mtd->writesize;
- if (!oob_enable)
- return;
-
- info->oob_size = info->spare_size;
- if (!info->use_ecc)
- info->oob_size += info->ecc_size;
-}
-
/**
* NOTE: it is a must to set ND_RUN firstly, then write
* command buffer, otherwise, it does not work.
static void handle_data_pio(struct pxa3xx_nand_info *info)
{
- unsigned int do_bytes = min(info->data_size, info->chunk_size);
-
switch (info->state) {
case STATE_PIO_WRITING:
- writesl(info->mmio_base + NDDB,
- info->data_buff + info->data_buff_pos,
- DIV_ROUND_UP(do_bytes, 4));
+ if (info->step_chunk_size)
+ writesl(info->mmio_base + NDDB,
+ info->data_buff + info->data_buff_pos,
+ DIV_ROUND_UP(info->step_chunk_size, 4));
- if (info->oob_size > 0)
+ if (info->step_spare_size)
writesl(info->mmio_base + NDDB,
info->oob_buff + info->oob_buff_pos,
- DIV_ROUND_UP(info->oob_size, 4));
+ DIV_ROUND_UP(info->step_spare_size, 4));
break;
case STATE_PIO_READING:
- drain_fifo(info,
- info->data_buff + info->data_buff_pos,
- DIV_ROUND_UP(do_bytes, 4));
+ if (info->step_chunk_size)
+ drain_fifo(info,
+ info->data_buff + info->data_buff_pos,
+ DIV_ROUND_UP(info->step_chunk_size, 4));
- if (info->oob_size > 0)
+ if (info->step_spare_size)
drain_fifo(info,
info->oob_buff + info->oob_buff_pos,
- DIV_ROUND_UP(info->oob_size, 4));
+ DIV_ROUND_UP(info->step_spare_size, 4));
break;
default:
dev_err(&info->pdev->dev, "%s: invalid state %d\n", __func__,
}
/* Update buffer pointers for multi-page read/write */
- info->data_buff_pos += do_bytes;
- info->oob_buff_pos += info->oob_size;
- info->data_size -= do_bytes;
+ info->data_buff_pos += info->step_chunk_size;
+ info->oob_buff_pos += info->step_spare_size;
}
static void pxa3xx_nand_data_dma_irq(void *data)
info->state);
BUG();
}
- info->sg.length = info->data_size +
- (info->oob_size ? info->spare_size + info->ecc_size : 0);
+ info->sg.length = info->chunk_size;
+ if (info->use_spare)
+ info->sg.length += info->spare_size + info->ecc_size;
dma_map_sg(info->dma_chan->device->dev, &info->sg, 1, info->dma_dir);
tx = dmaengine_prep_slave_sg(info->dma_chan, &info->sg, 1, direction,
/* reset data and oob column point to handle data */
info->buf_start = 0;
info->buf_count = 0;
- info->oob_size = 0;
info->data_buff_pos = 0;
info->oob_buff_pos = 0;
+ info->step_chunk_size = 0;
+ info->step_spare_size = 0;
+ info->cur_chunk = 0;
info->use_ecc = 0;
info->use_spare = 1;
info->retcode = ERR_NONE;
case NAND_CMD_READ0:
case NAND_CMD_PAGEPROG:
info->use_ecc = 1;
- case NAND_CMD_READOOB:
- pxa3xx_set_datasize(info, mtd);
break;
case NAND_CMD_PARAM:
info->use_spare = 0;
if (command == NAND_CMD_READOOB)
info->buf_start += mtd->writesize;
+ if (info->cur_chunk < info->nfullchunks) {
+ info->step_chunk_size = info->chunk_size;
+ info->step_spare_size = info->spare_size;
+ } else {
+ info->step_chunk_size = info->last_chunk_size;
+ info->step_spare_size = info->last_spare_size;
+ }
+
/*
* Multiple page read needs an 'extended command type' field,
* which is either naked-read or last-read according to the
info->ndcb0 |= NDCB0_DBC | (NAND_CMD_READSTART << 8)
| NDCB0_LEN_OVRD
| NDCB0_EXT_CMD_TYPE(ext_cmd_type);
- info->ndcb3 = info->chunk_size +
- info->oob_size;
+ info->ndcb3 = info->step_chunk_size +
+ info->step_spare_size;
}
set_command_address(info, mtd->writesize, column, page_addr);
| NDCB0_EXT_CMD_TYPE(ext_cmd_type)
| addr_cycle
| command;
- /* No data transfer in this case */
- info->data_size = 0;
exec_cmd = 1;
}
break;
break;
}
+ if (info->cur_chunk < info->nfullchunks) {
+ info->step_chunk_size = info->chunk_size;
+ info->step_spare_size = info->spare_size;
+ } else {
+ info->step_chunk_size = info->last_chunk_size;
+ info->step_spare_size = info->last_spare_size;
+ }
+
/* Second command setting for large pages */
if (mtd->writesize > PAGE_CHUNK_SIZE) {
/*
info->ndcb0 |= NDCB0_CMD_TYPE(0x1)
| NDCB0_LEN_OVRD
| NDCB0_EXT_CMD_TYPE(ext_cmd_type);
- info->ndcb3 = info->chunk_size +
- info->oob_size;
+ info->ndcb3 = info->step_chunk_size +
+ info->step_spare_size;
/*
* This is the command dispatch that completes a chunked
* page program operation.
*/
- if (info->data_size == 0) {
+ if (info->cur_chunk == info->ntotalchunks) {
info->ndcb0 = NDCB0_CMD_TYPE(0x1)
| NDCB0_EXT_CMD_TYPE(ext_cmd_type)
| command;
| command;
info->ndcb1 = (column & 0xFF);
info->ndcb3 = INIT_BUFFER_SIZE;
- info->data_size = INIT_BUFFER_SIZE;
+ info->step_chunk_size = INIT_BUFFER_SIZE;
break;
case NAND_CMD_READID:
| command;
info->ndcb1 = (column & 0xFF);
- info->data_size = 8;
+ info->step_chunk_size = 8;
break;
case NAND_CMD_STATUS:
info->buf_count = 1;
| NDCB0_ADDR_CYC(1)
| command;
- info->data_size = 8;
+ info->step_chunk_size = 8;
break;
case NAND_CMD_ERASE1:
init_completion(&info->dev_ready);
do {
info->state = STATE_PREPARED;
+
exec_cmd = prepare_set_command(info, command, ext_cmd_type,
column, page_addr);
if (!exec_cmd) {
break;
}
+ /* Only a few commands need several steps */
+ if (command != NAND_CMD_PAGEPROG &&
+ command != NAND_CMD_READ0 &&
+ command != NAND_CMD_READOOB)
+ break;
+
+ info->cur_chunk++;
+
/* Check if the sequence is complete */
- if (info->data_size == 0 && command != NAND_CMD_PAGEPROG)
+ if (info->cur_chunk == info->ntotalchunks && command != NAND_CMD_PAGEPROG)
break;
/*
* After a splitted program command sequence has issued
* the command dispatch, the command sequence is complete.
*/
- if (info->data_size == 0 &&
+ if (info->cur_chunk == (info->ntotalchunks + 1) &&
command == NAND_CMD_PAGEPROG &&
ext_cmd_type == EXT_CMD_TYPE_DISPATCH)
break;
if (command == NAND_CMD_READ0 || command == NAND_CMD_READOOB) {
/* Last read: issue a 'last naked read' */
- if (info->data_size == info->chunk_size)
+ if (info->cur_chunk == info->ntotalchunks - 1)
ext_cmd_type = EXT_CMD_TYPE_LAST_RW;
else
ext_cmd_type = EXT_CMD_TYPE_NAKED_RW;
* the command dispatch must be issued to complete.
*/
} else if (command == NAND_CMD_PAGEPROG &&
- info->data_size == 0) {
+ info->cur_chunk == info->ntotalchunks) {
ext_cmd_type = EXT_CMD_TYPE_DISPATCH;
}
} while (1);
int strength, int ecc_stepsize, int page_size)
{
if (strength == 1 && ecc_stepsize == 512 && page_size == 2048) {
+ info->nfullchunks = 1;
+ info->ntotalchunks = 1;
info->chunk_size = 2048;
info->spare_size = 40;
info->ecc_size = 24;
ecc->strength = 1;
} else if (strength == 1 && ecc_stepsize == 512 && page_size == 512) {
+ info->nfullchunks = 1;
+ info->ntotalchunks = 1;
info->chunk_size = 512;
info->spare_size = 8;
info->ecc_size = 8;
*/
} else if (strength == 4 && ecc_stepsize == 512 && page_size == 2048) {
info->ecc_bch = 1;
+ info->nfullchunks = 1;
+ info->ntotalchunks = 1;
info->chunk_size = 2048;
info->spare_size = 32;
info->ecc_size = 32;
} else if (strength == 4 && ecc_stepsize == 512 && page_size == 4096) {
info->ecc_bch = 1;
+ info->nfullchunks = 2;
+ info->ntotalchunks = 2;
info->chunk_size = 2048;
info->spare_size = 32;
info->ecc_size = 32;
*/
} else if (strength == 8 && ecc_stepsize == 512 && page_size == 4096) {
info->ecc_bch = 1;
+ info->nfullchunks = 4;
+ info->ntotalchunks = 5;
info->chunk_size = 1024;
info->spare_size = 0;
+ info->last_chunk_size = 0;
+ info->last_spare_size = 64;
info->ecc_size = 32;
ecc->mode = NAND_ECC_HW;
ecc->size = info->chunk_size;
if (ret < 0)
return ret;
- if (use_dma) {
+ if (!np && use_dma) {
r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
if (r == NULL) {
dev_err(&pdev->dev,
goto fail_disable_clk;
}
info->drcmr_dat = r->start;
-
- r = platform_get_resource(pdev, IORESOURCE_DMA, 1);
- if (r == NULL) {
- dev_err(&pdev->dev,
- "no resource defined for cmd DMA\n");
- ret = -ENXIO;
- goto fail_disable_clk;
- }
- info->drcmr_cmd = r->start;
}
irq = platform_get_irq(pdev, 0);
projects / linux-2.6-block.git / blobdiff