diff options
| author | Sascha Hauer <s.hauer@pengutronix.de> | 2016-09-15 10:32:52 +0200 |
|---|---|---|
| committer | Boris Brezillon <boris.brezillon@free-electrons.com> | 2016-09-23 09:35:16 +0200 |
| commit | 4123ea34aac754cdbd0a5e482c29be433c311d67 (patch) | |
| tree | c86f25bab02ffd0604c9c01f40a4c188f3554292 /drivers/mtd | |
| parent | 907f45fb9951b0440d832098baeae9162604eb98 (diff) | |
| download | talos-obmc-linux-4123ea34aac754cdbd0a5e482c29be433c311d67.tar.gz talos-obmc-linux-4123ea34aac754cdbd0a5e482c29be433c311d67.zip | |
mtd: nand: mxc: implement onfi get/set features
To be able to support different ONFI timing modes we have to implement
the onfi_set_features and onfi_get_features. Tested on an i.MX25 SoC.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/nand/mxc_nand.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c index 5173fadc9a4e..8bd8108066ea 100644 --- a/drivers/mtd/nand/mxc_nand.c +++ b/drivers/mtd/nand/mxc_nand.c @@ -1239,6 +1239,59 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command, } } +static int mxc_nand_onfi_set_features(struct mtd_info *mtd, + struct nand_chip *chip, int addr, + u8 *subfeature_param) +{ + struct nand_chip *nand_chip = mtd_to_nand(mtd); + struct mxc_nand_host *host = nand_get_controller_data(nand_chip); + int i; + + if (!chip->onfi_version || + !(le16_to_cpu(chip->onfi_params.opt_cmd) + & ONFI_OPT_CMD_SET_GET_FEATURES)) + return -EINVAL; + + host->buf_start = 0; + + for (i = 0; i < ONFI_SUBFEATURE_PARAM_LEN; ++i) + chip->write_byte(mtd, subfeature_param[i]); + + memcpy32_toio(host->main_area0, host->data_buf, mtd->writesize); + host->devtype_data->send_cmd(host, NAND_CMD_SET_FEATURES, false); + mxc_do_addr_cycle(mtd, addr, -1); + host->devtype_data->send_page(mtd, NFC_INPUT); + + return 0; +} + +static int mxc_nand_onfi_get_features(struct mtd_info *mtd, + struct nand_chip *chip, int addr, + u8 *subfeature_param) +{ + struct nand_chip *nand_chip = mtd_to_nand(mtd); + struct mxc_nand_host *host = nand_get_controller_data(nand_chip); + int i; + + if (!chip->onfi_version || + !(le16_to_cpu(chip->onfi_params.opt_cmd) + & ONFI_OPT_CMD_SET_GET_FEATURES)) + return -EINVAL; + + *(uint32_t *)host->main_area0 = 0xdeadbeef; + + host->devtype_data->send_cmd(host, NAND_CMD_GET_FEATURES, false); + mxc_do_addr_cycle(mtd, addr, -1); + host->devtype_data->send_page(mtd, NFC_OUTPUT); + memcpy32_fromio(host->data_buf, host->main_area0, 512); + host->buf_start = 0; + + for (i = 0; i < ONFI_SUBFEATURE_PARAM_LEN; ++i) + *subfeature_param++ = chip->read_byte(mtd); + + return 0; +} + /* * The generic flash bbt decriptors overlap with our ecc * hardware, so define some i.MX specific ones. @@ -1513,6 +1566,8 @@ static int mxcnd_probe(struct platform_device *pdev) this->read_word = mxc_nand_read_word; this->write_buf = mxc_nand_write_buf; this->read_buf = mxc_nand_read_buf; + this->onfi_set_features = mxc_nand_onfi_set_features; + this->onfi_get_features = mxc_nand_onfi_get_features; host->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(host->clk)) |
