redonkable/remarkable-linux
redonkable/remarkable-linux
1
0
Fork 0
Code Releases Activity

mtd: nand: mxc: implement onfi get/set features

Browse source 
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>
This commit is contained in:
Sascha Hauer 2016-09-15 10:32:52 +02:00 committed by Boris Brezillon
parent 907f45fb99
commit 4123ea34aa
1 changed files with 55 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

55
drivers/mtd/nand/mxc_nand.c
View file

@ -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))