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spl: nand: sunxi: create an helper to handle command execution
Executing a command is matter of always doing the following sequence: * Waiting for the FIFO to be empty so we can fill it with the new command. * Clearing the status register. * Writing the command in the FIFO. * Waiting for the command to finish. Add a nand_exec_cmd() helper to handle this instead of repeating the logic through the various functions. 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>
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781e70cff1
commit
a084cb6664
1 changed files with 21 additions and 21 deletions
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@ -177,6 +177,20 @@ static int nand_wait_int(void)
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return 0;
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}
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static int nand_exec_cmd(u32 cmd)
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{
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int ret;
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ret = nand_wait_cmd_fifo_empty();
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if (ret)
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return ret;
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writel(NFC_ST_CMD_INT_FLAG, SUNXI_NFC_BASE + NFC_ST);
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writel(cmd, SUNXI_NFC_BASE + NFC_CMD);
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return nand_wait_int();
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}
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void nand_init(void)
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{
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uint32_t val;
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@ -194,13 +208,7 @@ void nand_init(void)
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}
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/* reset NAND */
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nand_wait_cmd_fifo_empty();
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writel(NFC_ST_CMD_INT_FLAG, SUNXI_NFC_BASE + NFC_ST);
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writel(NFC_SEND_CMD1 | NFC_WAIT_FLAG | NAND_CMD_RESET,
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SUNXI_NFC_BASE + NFC_CMD);
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nand_wait_int();
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nand_exec_cmd(NFC_SEND_CMD1 | NFC_WAIT_FLAG | NAND_CMD_RESET);
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}
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static void nand_apply_config(const struct nfc_config *conf)
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@ -221,37 +229,29 @@ static int nand_load_page(const struct nfc_config *conf, u32 offs)
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{
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int page = offs / conf->page_size;
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nand_wait_cmd_fifo_empty();
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writel((NFC_CMD_RNDOUTSTART << NFC_RANDOM_READ_CMD1_OFFSET) |
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(NFC_CMD_RNDOUT << NFC_RANDOM_READ_CMD0_OFFSET) |
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(NFC_CMD_READSTART << NFC_READ_CMD_OFFSET),
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SUNXI_NFC_BASE + NFC_RCMD_SET);
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writel(((page & 0xFFFF) << 16), SUNXI_NFC_BASE + NFC_ADDR_LOW);
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writel((page >> 16) & 0xFF, SUNXI_NFC_BASE + NFC_ADDR_HIGH);
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writel(NFC_ST_CMD_INT_FLAG, SUNXI_NFC_BASE + NFC_ST);
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writel(NFC_SEND_CMD1 | NFC_SEND_CMD2 | NFC_RAW_CMD | NFC_WAIT_FLAG |
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((conf->addr_cycles - 1) << NFC_ADDR_NUM_OFFSET) | NFC_SEND_ADDR,
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SUNXI_NFC_BASE + NFC_CMD);
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return nand_wait_int();
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return nand_exec_cmd(NFC_SEND_CMD1 | NFC_SEND_CMD2 | NFC_RAW_CMD |
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NFC_SEND_ADDR | NFC_WAIT_FLAG |
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((conf->addr_cycles - 1) << NFC_ADDR_NUM_OFFSET));
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}
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static int nand_reset_column(void)
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{
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nand_wait_cmd_fifo_empty();
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writel((NFC_CMD_RNDOUTSTART << NFC_RANDOM_READ_CMD1_OFFSET) |
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(NFC_CMD_RNDOUT << NFC_RANDOM_READ_CMD0_OFFSET) |
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(NFC_CMD_RNDOUTSTART << NFC_READ_CMD_OFFSET),
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SUNXI_NFC_BASE + NFC_RCMD_SET);
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writel(NFC_ST_CMD_INT_FLAG, SUNXI_NFC_BASE + NFC_ST);
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writel(0, SUNXI_NFC_BASE + NFC_ADDR_LOW);
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writel(NFC_SEND_CMD1 | NFC_SEND_CMD2 | NFC_RAW_CMD |
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(1 << NFC_ADDR_NUM_OFFSET) | NFC_SEND_ADDR | NFC_CMD_RNDOUT,
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SUNXI_NFC_BASE + NFC_CMD);
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return nand_wait_int();
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return nand_exec_cmd(NFC_SEND_CMD1 | NFC_SEND_CMD2 | NFC_RAW_CMD |
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(1 << NFC_ADDR_NUM_OFFSET) | NFC_SEND_ADDR |
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NFC_CMD_RNDOUT);
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}
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static int nand_read_page(const struct nfc_config *conf, u32 offs,
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