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path: root/drivers/mtd/nand/pxa3xx_nand.c
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Diffstat (limited to 'drivers/mtd/nand/pxa3xx_nand.c')
-rw-r--r--drivers/mtd/nand/pxa3xx_nand.c147
1 files changed, 77 insertions, 70 deletions
diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
index a64ad15b8fdd..c0fa9c9edf08 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;
generated by cgit v1.2.3 (git 2.0.4) at 2024-04-19 23:17:23 +0000