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mtd: nand: sunxi: Stop using polling mode when waiting for long operations

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Some operations, like read/write an entire page of data with the ECC
engine enabled, are known to take a lot of time. Use the interrupt-based
waiting mode in these situation.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
This commit is contained in:
Boris Brezillon 2017-01-06 10:42:06 +01:00
parent 19649e2c16
commit 8de15e1feb
1 changed files with 18 additions and 6 deletions
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24
drivers/mtd/nand/sunxi_nand.c
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@ -522,6 +522,8 @@ static void sunxi_nfc_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
u32 tmp;
while (len > offs) {
bool poll = false;
cnt = min(len - offs, NFC_SRAM_SIZE);
ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);
@ -532,7 +534,11 @@ static void sunxi_nfc_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
tmp = NFC_DATA_TRANS | NFC_DATA_SWAP_METHOD;
writel(tmp, nfc->regs + NFC_REG_CMD);
ret = sunxi_nfc_wait_events(nfc, NFC_CMD_INT_FLAG, true, 0);
/* Arbitrary limit for polling mode */
if (cnt < 64)
poll = true;
ret = sunxi_nfc_wait_events(nfc, NFC_CMD_INT_FLAG, poll, 0);
if (ret)
break;
@ -555,6 +561,8 @@ static void sunxi_nfc_write_buf(struct mtd_info *mtd, const uint8_t *buf,
u32 tmp;
while (len > offs) {
bool poll = false;
cnt = min(len - offs, NFC_SRAM_SIZE);
ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);
@ -567,7 +575,11 @@ static void sunxi_nfc_write_buf(struct mtd_info *mtd, const uint8_t *buf,
NFC_ACCESS_DIR;
writel(tmp, nfc->regs + NFC_REG_CMD);
ret = sunxi_nfc_wait_events(nfc, NFC_CMD_INT_FLAG, true, 0);
/* Arbitrary limit for polling mode */
if (cnt < 64)
poll = true;
ret = sunxi_nfc_wait_events(nfc, NFC_CMD_INT_FLAG, poll, 0);
if (ret)
break;
@ -961,7 +973,7 @@ static int sunxi_nfc_hw_ecc_read_chunk(struct mtd_info *mtd,
writel(NFC_DATA_TRANS | NFC_DATA_SWAP_METHOD | NFC_ECC_OP,
nfc->regs + NFC_REG_CMD);
ret = sunxi_nfc_wait_events(nfc, NFC_CMD_INT_FLAG, true, 0);
ret = sunxi_nfc_wait_events(nfc, NFC_CMD_INT_FLAG, false, 0);
sunxi_nfc_randomizer_disable(mtd);
if (ret)
return ret;
@ -1073,7 +1085,7 @@ static int sunxi_nfc_hw_ecc_read_chunks_dma(struct mtd_info *mtd, uint8_t *buf,
writel(NFC_PAGE_OP | NFC_DATA_SWAP_METHOD | NFC_DATA_TRANS,
nfc->regs + NFC_REG_CMD);
ret = sunxi_nfc_wait_events(nfc, NFC_CMD_INT_FLAG, true, 0);
ret = sunxi_nfc_wait_events(nfc, NFC_CMD_INT_FLAG, false, 0);
if (ret)
dmaengine_terminate_all(nfc->dmac);
@ -1193,7 +1205,7 @@ static int sunxi_nfc_hw_ecc_write_chunk(struct mtd_info *mtd,
NFC_ACCESS_DIR | NFC_ECC_OP,
nfc->regs + NFC_REG_CMD);
ret = sunxi_nfc_wait_events(nfc, NFC_CMD_INT_FLAG, true, 0);
ret = sunxi_nfc_wait_events(nfc, NFC_CMD_INT_FLAG, false, 0);
sunxi_nfc_randomizer_disable(mtd);
if (ret)
return ret;
@ -1432,7 +1444,7 @@ static int sunxi_nfc_hw_ecc_write_page_dma(struct mtd_info *mtd,
NFC_DATA_TRANS | NFC_ACCESS_DIR,
nfc->regs + NFC_REG_CMD);
ret = sunxi_nfc_wait_events(nfc, NFC_CMD_INT_FLAG, true, 0);
ret = sunxi_nfc_wait_events(nfc, NFC_CMD_INT_FLAG, false, 0);
if (ret)
dmaengine_terminate_all(nfc->dmac);