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mtd: atmel_nand: replace memcpy32_toio/memcpy32_fromio with memcpy 

There is no need to use memcpy32_toio/memcpy32_fromio to transfer data
between memory and NFC sram. As the NFC sram is a also a memory space
not an I/O space, we can just use memcpy().

We remove the __iomem prefix for NFC sram to avoid sparse warnings.

Signed-off-by: Josh Wu <josh.wu@atmel.com>
Reviewed-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This commit is contained in:
Wu, Josh 2014-11-07 15:26:09 +08:00 committed by Brian Norris
parent 6710247706
commit 068b44b714
1 changed files with 10 additions and 29 deletions
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39
drivers/mtd/nand/atmel_nand.c
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@ -92,7 +92,7 @@ static struct nand_ecclayout atmel_oobinfo_small = {
struct atmel_nfc {
void __iomem *base_cmd_regs;
void __iomem *hsmc_regs;
void __iomem *sram_bank0;
void *sram_bank0;
dma_addr_t sram_bank0_phys;
bool use_nfc_sram;
bool write_by_sram;
@ -105,7 +105,7 @@ struct atmel_nfc {
struct completion comp_xfer_done;
/* Point to the sram bank which include readed data via NFC */
void __iomem *data_in_sram;
void *data_in_sram;
bool will_write_sram;
};
static struct atmel_nfc nand_nfc;
@ -257,26 +257,6 @@ static int atmel_nand_set_enable_ready_pins(struct mtd_info *mtd)
return res;
}
static void memcpy32_fromio(void *trg, const void __iomem *src, size_t size)
{
int i;
u32 *t = trg;
const __iomem u32 *s = src;
for (i = 0; i < (size >> 2); i++)
*t++ = readl_relaxed(s++);
}
static void memcpy32_toio(void __iomem *trg, const void *src, int size)
{
int i;
u32 __iomem *t = trg;
const u32 *s = src;
for (i = 0; i < (size >> 2); i++)
writel_relaxed(*s++, t++);
}
/*
* Minimal-overhead PIO for data access.
*/
@ -286,7 +266,7 @@ static void atmel_read_buf8(struct mtd_info *mtd, u8 *buf, int len)
struct atmel_nand_host *host = nand_chip->priv;
if (host->nfc && host->nfc->use_nfc_sram && host->nfc->data_in_sram) {
memcpy32_fromio(buf, host->nfc->data_in_sram, len);
memcpy(buf, host->nfc->data_in_sram, len);
host->nfc->data_in_sram += len;
} else {
__raw_readsb(nand_chip->IO_ADDR_R, buf, len);
@ -299,7 +279,7 @@ static void atmel_read_buf16(struct mtd_info *mtd, u8 *buf, int len)
struct atmel_nand_host *host = nand_chip->priv;
if (host->nfc && host->nfc->use_nfc_sram && host->nfc->data_in_sram) {
memcpy32_fromio(buf, host->nfc->data_in_sram, len);
memcpy(buf, host->nfc->data_in_sram, len);
host->nfc->data_in_sram += len;
} else {
__raw_readsw(nand_chip->IO_ADDR_R, buf, len / 2);
@ -1972,7 +1952,7 @@ static int nfc_sram_write_page(struct mtd_info *mtd, struct nand_chip *chip,
int cfg, len;
int status = 0;
struct atmel_nand_host *host = chip->priv;
void __iomem *sram = host->nfc->sram_bank0 + nfc_get_sram_off(host);
void *sram = host->nfc->sram_bank0 + nfc_get_sram_off(host);
/* Subpage write is not supported */
if (offset || (data_len < mtd->writesize))
@ -1983,14 +1963,14 @@ static int nfc_sram_write_page(struct mtd_info *mtd, struct nand_chip *chip,
if (use_dma) {
if (atmel_nand_dma_op(mtd, (void *)buf, len, 0) != 0)
/* Fall back to use cpu copy */
memcpy32_toio(sram, buf, len);
memcpy(sram, buf, len);
} else {
memcpy32_toio(sram, buf, len);
memcpy(sram, buf, len);
}
cfg = nfc_readl(host->nfc->hsmc_regs, CFG);
if (unlikely(raw) && oob_required) {
memcpy32_toio(sram + len, chip->oob_poi, mtd->oobsize);
memcpy(sram + len, chip->oob_poi, mtd->oobsize);
len += mtd->oobsize;
nfc_writel(host->nfc->hsmc_regs, CFG, cfg | NFC_CFG_WSPARE);
} else {
@ -2333,7 +2313,8 @@ static int atmel_nand_nfc_probe(struct platform_device *pdev)
nfc_sram = platform_get_resource(pdev, IORESOURCE_MEM, 2);
if (nfc_sram) {
nfc->sram_bank0 = devm_ioremap_resource(&pdev->dev, nfc_sram);
nfc->sram_bank0 = (void * __force)
devm_ioremap_resource(&pdev->dev, nfc_sram);
if (IS_ERR(nfc->sram_bank0)) {
dev_warn(&pdev->dev, "Fail to ioremap the NFC sram with error: %ld. So disable NFC sram.\n",
PTR_ERR(nfc->sram_bank0));