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Diffstat (limited to 'drivers/mtd/nand/pxa3xx_nand.c')
-rw-r--r--drivers/mtd/nand/pxa3xx_nand.c348
1 files changed, 94 insertions, 254 deletions
diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
index 4d01cda68844..17f8518cc5eb 100644
--- a/drivers/mtd/nand/pxa3xx_nand.c
+++ b/drivers/mtd/nand/pxa3xx_nand.c
@@ -117,7 +117,7 @@ struct pxa3xx_nand_info {
struct nand_chip nand_chip;
struct platform_device *pdev;
- const struct pxa3xx_nand_flash *flash_info;
+ struct pxa3xx_nand_cmdset *cmdset;
struct clk *clk;
void __iomem *mmio_base;
@@ -131,6 +131,7 @@ struct pxa3xx_nand_info {
int drcmr_cmd;
unsigned char *data_buff;
+ unsigned char *oob_buff;
dma_addr_t data_buff_phys;
size_t data_buff_size;
int data_dma_ch;
@@ -149,7 +150,8 @@ struct pxa3xx_nand_info {
int use_ecc; /* use HW ECC ? */
int use_dma; /* use DMA ? */
- size_t data_size; /* data size in FIFO */
+ unsigned int page_size; /* page size of attached chip */
+ unsigned int data_size; /* data size in FIFO */
int retcode;
struct completion cmd_complete;
@@ -158,6 +160,10 @@ struct pxa3xx_nand_info {
uint32_t ndcb1;
uint32_t ndcb2;
+ /* timing calcuted from setting */
+ uint32_t ndtr0cs0;
+ uint32_t ndtr1cs0;
+
/* calculated from pxa3xx_nand_flash data */
size_t oob_size;
size_t read_id_bytes;
@@ -174,23 +180,7 @@ MODULE_PARM_DESC(use_dma, "enable DMA for data transfering to/from NAND HW");
* Default NAND flash controller configuration setup by the
* bootloader. This configuration is used only when pdata->keep_config is set
*/
-static struct pxa3xx_nand_timing default_timing;
-static struct pxa3xx_nand_flash default_flash;
-
-static struct pxa3xx_nand_cmdset smallpage_cmdset = {
- .read1 = 0x0000,
- .read2 = 0x0050,
- .program = 0x1080,
- .read_status = 0x0070,
- .read_id = 0x0090,
- .erase = 0xD060,
- .reset = 0x00FF,
- .lock = 0x002A,
- .unlock = 0x2423,
- .lock_status = 0x007A,
-};
-
-static struct pxa3xx_nand_cmdset largepage_cmdset = {
+static struct pxa3xx_nand_cmdset default_cmdset = {
.read1 = 0x3000,
.read2 = 0x0050,
.program = 0x1080,
@@ -203,142 +193,27 @@ static struct pxa3xx_nand_cmdset largepage_cmdset = {
.lock_status = 0x007A,
};
-#ifdef CONFIG_MTD_NAND_PXA3xx_BUILTIN
-static struct pxa3xx_nand_timing samsung512MbX16_timing = {
- .tCH = 10,
- .tCS = 0,
- .tWH = 20,
- .tWP = 40,
- .tRH = 30,
- .tRP = 40,
- .tR = 11123,
- .tWHR = 110,
- .tAR = 10,
-};
-
-static struct pxa3xx_nand_flash samsung512MbX16 = {
- .timing = &samsung512MbX16_timing,
- .cmdset = &smallpage_cmdset,
- .page_per_block = 32,
- .page_size = 512,
- .flash_width = 16,
- .dfc_width = 16,
- .num_blocks = 4096,
- .chip_id = 0x46ec,
-};
-
-static struct pxa3xx_nand_flash samsung2GbX8 = {
- .timing = &samsung512MbX16_timing,
- .cmdset = &smallpage_cmdset,
- .page_per_block = 64,
- .page_size = 2048,
- .flash_width = 8,
- .dfc_width = 8,
- .num_blocks = 2048,
- .chip_id = 0xdaec,
+static struct pxa3xx_nand_timing timing[] = {
+ { 40, 80, 60, 100, 80, 100, 90000, 400, 40, },
+ { 10, 0, 20, 40, 30, 40, 11123, 110, 10, },
+ { 10, 25, 15, 25, 15, 30, 25000, 60, 10, },
+ { 10, 35, 15, 25, 15, 25, 25000, 60, 10, },
};
-static struct pxa3xx_nand_flash samsung32GbX8 = {
- .timing = &samsung512MbX16_timing,
- .cmdset = &smallpage_cmdset,
- .page_per_block = 128,
- .page_size = 4096,
- .flash_width = 8,
- .dfc_width = 8,
- .num_blocks = 8192,
- .chip_id = 0xd7ec,
+static struct pxa3xx_nand_flash builtin_flash_types[] = {
+ { 0, 0, 2048, 8, 8, 0, &default_cmdset, &timing[0] },
+ { 0x46ec, 32, 512, 16, 16, 4096, &default_cmdset, &timing[1] },
+ { 0xdaec, 64, 2048, 8, 8, 2048, &default_cmdset, &timing[1] },
+ { 0xd7ec, 128, 4096, 8, 8, 8192, &default_cmdset, &timing[1] },
+ { 0xa12c, 64, 2048, 8, 8, 1024, &default_cmdset, &timing[2] },
+ { 0xb12c, 64, 2048, 16, 16, 1024, &default_cmdset, &timing[2] },
+ { 0xdc2c, 64, 2048, 8, 8, 4096, &default_cmdset, &timing[2] },
+ { 0xcc2c, 64, 2048, 16, 16, 4096, &default_cmdset, &timing[2] },
+ { 0xba20, 64, 2048, 16, 16, 2048, &default_cmdset, &timing[3] },
};
-static struct pxa3xx_nand_timing micron_timing = {
- .tCH = 10,
- .tCS = 25,
- .tWH = 15,
- .tWP = 25,
- .tRH = 15,
- .tRP = 30,
- .tR = 25000,
- .tWHR = 60,
- .tAR = 10,
-};
-
-static struct pxa3xx_nand_flash micron1GbX8 = {
- .timing = &micron_timing,
- .cmdset = &largepage_cmdset,
- .page_per_block = 64,
- .page_size = 2048,
- .flash_width = 8,
- .dfc_width = 8,
- .num_blocks = 1024,
- .chip_id = 0xa12c,
-};
-
-static struct pxa3xx_nand_flash micron1GbX16 = {
- .timing = &micron_timing,
- .cmdset = &largepage_cmdset,
- .page_per_block = 64,
- .page_size = 2048,
- .flash_width = 16,
- .dfc_width = 16,
- .num_blocks = 1024,
- .chip_id = 0xb12c,
-};
-
-static struct pxa3xx_nand_flash micron4GbX8 = {
- .timing = &micron_timing,
- .cmdset = &largepage_cmdset,
- .page_per_block = 64,
- .page_size = 2048,
- .flash_width = 8,
- .dfc_width = 8,
- .num_blocks = 4096,
- .chip_id = 0xdc2c,
-};
-
-static struct pxa3xx_nand_flash micron4GbX16 = {
- .timing = &micron_timing,
- .cmdset = &largepage_cmdset,
- .page_per_block = 64,
- .page_size = 2048,
- .flash_width = 16,
- .dfc_width = 16,
- .num_blocks = 4096,
- .chip_id = 0xcc2c,
-};
-
-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,
- .cmdset = &largepage_cmdset,
- .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,
- &samsung2GbX8,
- &samsung32GbX8,
- &micron1GbX8,
- &micron1GbX16,
- &micron4GbX8,
- &micron4GbX16,
- &stm2GbX16,
-};
-#endif /* CONFIG_MTD_NAND_PXA3xx_BUILTIN */
+/* Define a default flash type setting serve as flash detecting only */
+#define DEFAULT_FLASH_TYPE (&builtin_flash_types[0])
#define NDTR0_tCH(c) (min((c), 7) << 19)
#define NDTR0_tCS(c) (min((c), 7) << 16)
@@ -351,23 +226,9 @@ static struct pxa3xx_nand_flash *builtin_flash_types[] = {
#define NDTR1_tWHR(c) (min((c), 15) << 4)
#define NDTR1_tAR(c) (min((c), 15) << 0)
-#define tCH_NDTR0(r) (((r) >> 19) & 0x7)
-#define tCS_NDTR0(r) (((r) >> 16) & 0x7)
-#define tWH_NDTR0(r) (((r) >> 11) & 0x7)
-#define tWP_NDTR0(r) (((r) >> 8) & 0x7)
-#define tRH_NDTR0(r) (((r) >> 3) & 0x7)
-#define tRP_NDTR0(r) (((r) >> 0) & 0x7)
-
-#define tR_NDTR1(r) (((r) >> 16) & 0xffff)
-#define tWHR_NDTR1(r) (((r) >> 4) & 0xf)
-#define tAR_NDTR1(r) (((r) >> 0) & 0xf)
-
/* convert nano-seconds to nand flash controller clock cycles */
#define ns2cycle(ns, clk) (int)((ns) * (clk / 1000000) / 1000)
-/* convert nand flash controller clock cycles to nano-seconds */
-#define cycle2ns(c, clk) ((((c) + 1) * 1000000 + clk / 500) / (clk / 1000))
-
static void pxa3xx_nand_set_timing(struct pxa3xx_nand_info *info,
const struct pxa3xx_nand_timing *t)
{
@@ -385,6 +246,8 @@ static void pxa3xx_nand_set_timing(struct pxa3xx_nand_info *info,
NDTR1_tWHR(ns2cycle(t->tWHR, nand_clk)) |
NDTR1_tAR(ns2cycle(t->tAR, nand_clk));
+ info->ndtr0cs0 = ndtr0;
+ info->ndtr1cs0 = ndtr1;
nand_writel(info, NDTR0CS0, ndtr0);
nand_writel(info, NDTR1CS0, ndtr1);
}
@@ -408,23 +271,31 @@ static int wait_for_event(struct pxa3xx_nand_info *info, uint32_t event)
return -ETIMEDOUT;
}
-static int prepare_read_prog_cmd(struct pxa3xx_nand_info *info,
- uint16_t cmd, int column, int page_addr)
+static void pxa3xx_set_datasize(struct pxa3xx_nand_info *info)
{
- const struct pxa3xx_nand_flash *f = info->flash_info;
- const struct pxa3xx_nand_cmdset *cmdset = f->cmdset;
+ int oob_enable = info->reg_ndcr & NDCR_SPARE_EN;
- /* calculate data size */
- switch (f->page_size) {
+ info->data_size = info->page_size;
+ if (!oob_enable) {
+ info->oob_size = 0;
+ return;
+ }
+
+ switch (info->page_size) {
case 2048:
- info->data_size = (info->use_ecc) ? 2088 : 2112;
+ info->oob_size = (info->use_ecc) ? 40 : 64;
break;
case 512:
- info->data_size = (info->use_ecc) ? 520 : 528;
+ info->oob_size = (info->use_ecc) ? 8 : 16;
break;
- default:
- return -EINVAL;
}
+}
+
+static int prepare_read_prog_cmd(struct pxa3xx_nand_info *info,
+ uint16_t cmd, int column, int page_addr)
+{
+ const struct pxa3xx_nand_cmdset *cmdset = info->cmdset;
+ pxa3xx_set_datasize(info);
/* generate values for NDCBx registers */
info->ndcb0 = cmd | ((cmd & 0xff00) ? NDCB0_DBC : 0);
@@ -463,12 +334,13 @@ static int prepare_erase_cmd(struct pxa3xx_nand_info *info,
static int prepare_other_cmd(struct pxa3xx_nand_info *info, uint16_t cmd)
{
- const struct pxa3xx_nand_cmdset *cmdset = info->flash_info->cmdset;
+ const struct pxa3xx_nand_cmdset *cmdset = info->cmdset;
info->ndcb0 = cmd | ((cmd & 0xff00) ? NDCB0_DBC : 0);
info->ndcb1 = 0;
info->ndcb2 = 0;
+ info->oob_size = 0;
if (cmd == cmdset->read_id) {
info->ndcb0 |= NDCB0_CMD_TYPE(3);
info->data_size = 8;
@@ -537,6 +409,9 @@ static int handle_data_pio(struct pxa3xx_nand_info *info)
case STATE_PIO_WRITING:
__raw_writesl(info->mmio_base + NDDB, info->data_buff,
DIV_ROUND_UP(info->data_size, 4));
+ if (info->oob_size > 0)
+ __raw_writesl(info->mmio_base + NDDB, info->oob_buff,
+ DIV_ROUND_UP(info->oob_size, 4));
enable_int(info, NDSR_CS0_BBD | NDSR_CS0_CMDD);
@@ -549,6 +424,9 @@ static int handle_data_pio(struct pxa3xx_nand_info *info)
case STATE_PIO_READING:
__raw_readsl(info->mmio_base + NDDB, info->data_buff,
DIV_ROUND_UP(info->data_size, 4));
+ if (info->oob_size > 0)
+ __raw_readsl(info->mmio_base + NDDB, info->oob_buff,
+ DIV_ROUND_UP(info->oob_size, 4));
break;
default:
printk(KERN_ERR "%s: invalid state %d\n", __func__,
@@ -563,7 +441,7 @@ static int handle_data_pio(struct pxa3xx_nand_info *info)
static void start_data_dma(struct pxa3xx_nand_info *info, int dir_out)
{
struct pxa_dma_desc *desc = info->data_desc;
- int dma_len = ALIGN(info->data_size, 32);
+ int dma_len = ALIGN(info->data_size + info->oob_size, 32);
desc->ddadr = DDADR_STOP;
desc->dcmd = DCMD_ENDIRQEN | DCMD_WIDTH4 | DCMD_BURST32 | dma_len;
@@ -700,8 +578,7 @@ static void pxa3xx_nand_cmdfunc(struct mtd_info *mtd, unsigned command,
int column, int page_addr)
{
struct pxa3xx_nand_info *info = mtd->priv;
- const struct pxa3xx_nand_flash *flash_info = info->flash_info;
- const struct pxa3xx_nand_cmdset *cmdset = flash_info->cmdset;
+ const struct pxa3xx_nand_cmdset *cmdset = info->cmdset;
int ret;
info->use_dma = (use_dma) ? 1 : 0;
@@ -925,8 +802,7 @@ static int pxa3xx_nand_ecc_correct(struct mtd_info *mtd,
static int __readid(struct pxa3xx_nand_info *info, uint32_t *id)
{
- const struct pxa3xx_nand_flash *f = info->flash_info;
- const struct pxa3xx_nand_cmdset *cmdset = f->cmdset;
+ const struct pxa3xx_nand_cmdset *cmdset = info->cmdset;
uint32_t ndcr;
uint8_t id_buff[8];
@@ -968,7 +844,9 @@ static int pxa3xx_nand_config_flash(struct pxa3xx_nand_info *info,
return -EINVAL;
/* calculate flash information */
- info->oob_size = (f->page_size == 2048) ? 64 : 16;
+ info->cmdset = f->cmdset;
+ info->page_size = f->page_size;
+ info->oob_buff = info->data_buff + f->page_size;
info->read_id_bytes = (f->page_size == 2048) ? 4 : 2;
/* calculate addressing information */
@@ -992,49 +870,20 @@ static int pxa3xx_nand_config_flash(struct pxa3xx_nand_info *info,
info->reg_ndcr = ndcr;
pxa3xx_nand_set_timing(info, f->timing);
- info->flash_info = f;
return 0;
}
-static void pxa3xx_nand_detect_timing(struct pxa3xx_nand_info *info,
- struct pxa3xx_nand_timing *t)
-{
- unsigned long nand_clk = clk_get_rate(info->clk);
- uint32_t ndtr0 = nand_readl(info, NDTR0CS0);
- uint32_t ndtr1 = nand_readl(info, NDTR1CS0);
-
- t->tCH = cycle2ns(tCH_NDTR0(ndtr0), nand_clk);
- t->tCS = cycle2ns(tCS_NDTR0(ndtr0), nand_clk);
- t->tWH = cycle2ns(tWH_NDTR0(ndtr0), nand_clk);
- t->tWP = cycle2ns(tWP_NDTR0(ndtr0), nand_clk);
- t->tRH = cycle2ns(tRH_NDTR0(ndtr0), nand_clk);
- t->tRP = cycle2ns(tRP_NDTR0(ndtr0), nand_clk);
-
- t->tR = cycle2ns(tR_NDTR1(ndtr1), nand_clk);
- t->tWHR = cycle2ns(tWHR_NDTR1(ndtr1), nand_clk);
- t->tAR = cycle2ns(tAR_NDTR1(ndtr1), nand_clk);
-}
-
static int pxa3xx_nand_detect_config(struct pxa3xx_nand_info *info)
{
uint32_t ndcr = nand_readl(info, NDCR);
struct nand_flash_dev *type = NULL;
- uint32_t id = -1;
+ uint32_t id = -1, page_per_block, num_blocks;
int i;
- default_flash.page_per_block = ndcr & NDCR_PG_PER_BLK ? 64 : 32;
- default_flash.page_size = ndcr & NDCR_PAGE_SZ ? 2048 : 512;
- default_flash.flash_width = ndcr & NDCR_DWIDTH_M ? 16 : 8;
- default_flash.dfc_width = ndcr & NDCR_DWIDTH_C ? 16 : 8;
-
- if (default_flash.page_size == 2048)
- default_flash.cmdset = &largepage_cmdset;
- else
- default_flash.cmdset = &smallpage_cmdset;
-
+ page_per_block = ndcr & NDCR_PG_PER_BLK ? 64 : 32;
+ info->page_size = ndcr & NDCR_PAGE_SZ ? 2048 : 512;
/* set info fields needed to __readid */
- info->flash_info = &default_flash;
- info->read_id_bytes = (default_flash.page_size == 2048) ? 4 : 2;
+ info->read_id_bytes = (info->page_size == 2048) ? 4 : 2;
info->reg_ndcr = ndcr;
if (__readid(info, &id))
@@ -1053,21 +902,20 @@ static int pxa3xx_nand_detect_config(struct pxa3xx_nand_info *info)
return -ENODEV;
/* fill the missing flash information */
- i = __ffs(default_flash.page_per_block * default_flash.page_size);
- default_flash.num_blocks = type->chipsize << (20 - i);
-
- info->oob_size = (default_flash.page_size == 2048) ? 64 : 16;
+ i = __ffs(page_per_block * info->page_size);
+ num_blocks = type->chipsize << (20 - i);
/* calculate addressing information */
- info->col_addr_cycles = (default_flash.page_size == 2048) ? 2 : 1;
+ info->col_addr_cycles = (info->page_size == 2048) ? 2 : 1;
- if (default_flash.num_blocks * default_flash.page_per_block > 65536)
+ if (num_blocks * page_per_block > 65536)
info->row_addr_cycles = 3;
else
info->row_addr_cycles = 2;
- pxa3xx_nand_detect_timing(info, &default_timing);
- default_flash.timing = &default_timing;
+ info->ndtr0cs0 = nand_readl(info, NDTR0CS0);
+ info->ndtr1cs0 = nand_readl(info, NDTR1CS0);
+ info->cmdset = &default_cmdset;
return 0;
}
@@ -1083,38 +931,29 @@ static int pxa3xx_nand_detect_flash(struct pxa3xx_nand_info *info,
if (pxa3xx_nand_detect_config(info) == 0)
return 0;
- 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];
-
- if (pxa3xx_nand_config_flash(info, f))
- continue;
-
- if (__readid(info, &id))
- continue;
-
- if (id == f->chip_id)
+ /* we use default timing to detect id */
+ f = DEFAULT_FLASH_TYPE;
+ pxa3xx_nand_config_flash(info, f);
+ if (__readid(info, &id))
+ goto fail_detect;
+
+ for (i=0; i<ARRAY_SIZE(builtin_flash_types) + pdata->num_flash - 1; i++) {
+ /* we first choose the flash definition from platfrom */
+ if (i < pdata->num_flash)
+ f = pdata->flash + i;
+ else
+ f = &builtin_flash_types[i - pdata->num_flash + 1];
+ if (f->chip_id == id) {
+ dev_info(&info->pdev->dev, "detect chip id: 0x%x\n", id);
+ pxa3xx_nand_config_flash(info, f);
return 0;
+ }
}
-#endif
dev_warn(&info->pdev->dev,
"failed to detect configured nand flash; found %04x instead of\n",
id);
+fail_detect:
return -ENODEV;
}
@@ -1177,10 +1016,9 @@ static struct nand_ecclayout hw_largepage_ecclayout = {
static void pxa3xx_nand_init_mtd(struct mtd_info *mtd,
struct pxa3xx_nand_info *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;
+ this->options = (info->reg_ndcr & NDCR_DWIDTH_C) ? NAND_BUSWIDTH_16: 0;
this->waitfunc = pxa3xx_nand_waitfunc;
this->select_chip = pxa3xx_nand_select_chip;
@@ -1196,9 +1034,9 @@ static void pxa3xx_nand_init_mtd(struct mtd_info *mtd,
this->ecc.hwctl = pxa3xx_nand_ecc_hwctl;
this->ecc.calculate = pxa3xx_nand_ecc_calculate;
this->ecc.correct = pxa3xx_nand_ecc_correct;
- this->ecc.size = f->page_size;
+ this->ecc.size = info->page_size;
- if (f->page_size == 2048)
+ if (info->page_size == 2048)
this->ecc.layout = &hw_largepage_ecclayout;
else
this->ecc.layout = &hw_smallpage_ecclayout;
@@ -1411,9 +1249,11 @@ static int pxa3xx_nand_resume(struct platform_device *pdev)
struct mtd_info *mtd = (struct mtd_info *)platform_get_drvdata(pdev);
struct pxa3xx_nand_info *info = mtd->priv;
+ nand_writel(info, NDTR0CS0, info->ndtr0cs0);
+ nand_writel(info, NDTR1CS0, info->ndtr1cs0);
clk_enable(info->clk);
- return pxa3xx_nand_config_flash(info, info->flash_info);
+ return 0;
}
#else
#define pxa3xx_nand_suspend NULL
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.