openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

[MTD] [NAND] pxa3xx_nand: moved some helper variables out from platform data 

This patch moves some attributes out from the platform data into the
dynamically created nand device.   This results into a cleaner interface
and allows to use constant pxa3xx_nand_flash definitions.

Signed-off-by: Enrico Scholz <enrico.scholz@sigma-chemnitz.de>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Enrico Scholz 2008-08-29 12:59:51 +02:00 committed by David Woodhouse
parent 7dad482ed0
commit c8c17c888d
2 changed files with 26 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
arch/arm/mach-pxa/include/mach/pxa3xx_nand.h
View File

@ -39,13 +39,6 @@ struct pxa3xx_nand_flash {
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_platform_data {
@ -59,7 +52,7 @@ struct pxa3xx_nand_platform_data {
const struct mtd_partition *parts;
unsigned int nr_parts;
struct pxa3xx_nand_flash * const flash;
const struct pxa3xx_nand_flash * flash;
size_t num_flash;
};

43
drivers/mtd/nand/pxa3xx_nand.c
View File

@ -119,7 +119,7 @@ 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;
@ -158,6 +158,13 @@ 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;
@ -335,7 +342,7 @@ 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;
const struct pxa3xx_nand_flash *f = info->flash_info;
const struct pxa3xx_nand_cmdset *cmdset = f->cmdset;
/* calculate data size */
@ -354,14 +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
@ -622,7 +629,7 @@ 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;
const struct pxa3xx_nand_flash *flash_info = info->flash_info;
const struct pxa3xx_nand_cmdset *cmdset = flash_info->cmdset;
int ret;
@ -701,7 +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))
@ -842,7 +849,7 @@ 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;
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];
@ -872,7 +879,7 @@ static int __readid(struct pxa3xx_nand_info *info, uint32_t *id)
}
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;
@ -885,25 +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;
@ -916,7 +923,7 @@ static int pxa3xx_nand_config_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;
const struct pxa3xx_nand_flash *f;
uint32_t id;
int i;
@ -1011,7 +1018,7 @@ 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;