diff options
| author | Miquel Raynal <miquel.raynal@bootlin.com> | 2018-02-28 20:51:47 +0100 |
|---|---|---|
| committer | Maxime Ripard <maxime.ripard@bootlin.com> | 2018-04-03 12:11:04 +0200 |
| commit | 28f7a9d375c8bc7a30563b8d995b9baa355c7e41 (patch) | |
| tree | ec067ee6f0c326340ad1070a53067c18d54253f2 /drivers/mtd/nand | |
| parent | 802f766994ded5afc9d89e93556011063a430e0d (diff) | |
spl: nand: sunxi: introduce the nand_wait_int() helper
The pattern of polling on a status register until a bit is set or a
timeout occurs is repeated multiple times in the driver. Mutualize the
code by introducing the nand_wait_int() helper that does wait for the
bit to flip or returns an error in case of timeout.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Diffstat (limited to 'drivers/mtd/nand')
| -rw-r--r-- | drivers/mtd/nand/sunxi_nand_spl.c | 34 |
1 files changed, 14 insertions, 20 deletions
diff --git a/drivers/mtd/nand/sunxi_nand_spl.c b/drivers/mtd/nand/sunxi_nand_spl.c index 608cc997ca..c2f4f2cbf7 100644 --- a/drivers/mtd/nand/sunxi_nand_spl.c +++ b/drivers/mtd/nand/sunxi_nand_spl.c @@ -155,6 +155,17 @@ static inline int check_value_negated(int offset, int unexpected_bits, return check_value_inner(offset, unexpected_bits, timeout_us, 1); } +static int nand_wait_int(void) +{ + if (!check_value(SUNXI_NFC_BASE + NFC_ST, NFC_ST_CMD_INT_FLAG, + DEFAULT_TIMEOUT_US)) { + printf("nand: timeout waiting for interruption\n"); + return -ETIMEDOUT; + } + + return 0; +} + void nand_init(void) { uint32_t val; @@ -176,12 +187,7 @@ void nand_init(void) writel(NFC_SEND_CMD1 | NFC_WAIT_FLAG | NAND_CMD_RESET, SUNXI_NFC_BASE + NFC_CMD); - if (!check_value(SUNXI_NFC_BASE + NFC_ST, NFC_ST_CMD_INT_FLAG, - DEFAULT_TIMEOUT_US)) { - printf("Error timeout waiting for nand reset\n"); - return; - } - writel(NFC_ST_CMD_INT_FLAG, SUNXI_NFC_BASE + NFC_ST); + nand_wait_int(); } static void nand_apply_config(const struct nfc_config *conf) @@ -211,13 +217,7 @@ static int nand_load_page(const struct nfc_config *conf, u32 offs) ((conf->addr_cycles - 1) << NFC_ADDR_NUM_OFFSET) | NFC_SEND_ADDR, SUNXI_NFC_BASE + NFC_CMD); - if (!check_value(SUNXI_NFC_BASE + NFC_ST, NFC_ST_CMD_INT_FLAG, - DEFAULT_TIMEOUT_US)) { - printf("Error while initializing dma interrupt\n"); - return -EIO; - } - - return 0; + return nand_wait_int(); } static int nand_reset_column(void) @@ -231,13 +231,7 @@ static int nand_reset_column(void) (1 << NFC_ADDR_NUM_OFFSET) | NFC_SEND_ADDR | NFC_CMD_RNDOUT, SUNXI_NFC_BASE + NFC_CMD); - if (!check_value(SUNXI_NFC_BASE + NFC_ST, NFC_ST_CMD_INT_FLAG, - DEFAULT_TIMEOUT_US)) { - printf("Error while initializing dma interrupt\n"); - return -1; - } - - return 0; + return nand_wait_int(); } static int nand_read_page(const struct nfc_config *conf, u32 offs, |