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path: root/drivers/mtd/nand/atmel_nand.c
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Diffstat (limited to 'drivers/mtd/nand/atmel_nand.c')
-rw-r--r--drivers/mtd/nand/atmel_nand.c105
1 files changed, 33 insertions, 72 deletions
diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c
index 060feeaf6b3..4ce181a35bc 100644
--- a/drivers/mtd/nand/atmel_nand.c
+++ b/drivers/mtd/nand/atmel_nand.c
@@ -375,8 +375,7 @@ static int atmel_nand_dma_op(struct mtd_info *mtd, void *buf, int len,
dma_dev = host->dma_chan->device;
- flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT | DMA_COMPL_SKIP_SRC_UNMAP |
- DMA_COMPL_SKIP_DEST_UNMAP;
+ flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT;
phys_addr = dma_map_single(dma_dev->dev, p, len, dir);
if (dma_mapping_error(dma_dev->dev, phys_addr)) {
@@ -431,7 +430,7 @@ err_dma:
dma_unmap_single(dma_dev->dev, phys_addr, len, dir);
err_buf:
if (err != 0)
- dev_warn(host->dev, "Fall back to CPU I/O\n");
+ dev_dbg(host->dev, "Fall back to CPU I/O\n");
return err;
}
@@ -1062,56 +1061,28 @@ static void atmel_pmecc_core_init(struct mtd_info *mtd)
}
/*
- * Get ECC requirement in ONFI parameters, returns -1 if ONFI
- * parameters is not supported.
- * return 0 if success to get the ECC requirement.
- */
-static int get_onfi_ecc_param(struct nand_chip *chip,
- int *ecc_bits, int *sector_size)
-{
- *ecc_bits = *sector_size = 0;
-
- if (chip->onfi_params.ecc_bits == 0xff)
- /* TODO: the sector_size and ecc_bits need to be find in
- * extended ecc parameter, currently we don't support it.
- */
- return -1;
-
- *ecc_bits = chip->onfi_params.ecc_bits;
-
- /* The default sector size (ecc codeword size) is 512 */
- *sector_size = 512;
-
- return 0;
-}
-
-/*
- * Get ecc requirement from ONFI parameters ecc requirement.
+ * Get minimum ecc requirements from NAND.
* If pmecc-cap, pmecc-sector-size in DTS are not specified, this function
- * will set them according to ONFI ecc requirement. Otherwise, use the
+ * will set them according to minimum ecc requirement. Otherwise, use the
* value in DTS file.
* return 0 if success. otherwise return error code.
*/
static int pmecc_choose_ecc(struct atmel_nand_host *host,
int *cap, int *sector_size)
{
- /* Get ECC requirement from ONFI parameters */
- *cap = *sector_size = 0;
- if (host->nand_chip.onfi_version) {
- if (!get_onfi_ecc_param(&host->nand_chip, cap, sector_size))
- dev_info(host->dev, "ONFI params, minimum required ECC: %d bits in %d bytes\n",
+ /* Get minimum ECC requirements */
+ if (host->nand_chip.ecc_strength_ds) {
+ *cap = host->nand_chip.ecc_strength_ds;
+ *sector_size = host->nand_chip.ecc_step_ds;
+ dev_info(host->dev, "minimum ECC: %d bits in %d bytes\n",
*cap, *sector_size);
- else
- dev_info(host->dev, "NAND chip ECC reqirement is in Extended ONFI parameter, we don't support yet.\n");
} else {
- dev_info(host->dev, "NAND chip is not ONFI compliant, assume ecc_bits is 2 in 512 bytes");
- }
- if (*cap == 0 && *sector_size == 0) {
*cap = 2;
*sector_size = 512;
+ dev_info(host->dev, "can't detect min. ECC, assume 2 bits in 512 bytes\n");
}
- /* If dts file doesn't specify then use the one in ONFI parameters */
+ /* If device tree doesn't specify, use NAND's minimum ECC parameters */
if (host->pmecc_corr_cap == 0) {
/* use the most fitable ecc bits (the near bigger one ) */
if (*cap <= 2)
@@ -1139,7 +1110,7 @@ static int pmecc_choose_ecc(struct atmel_nand_host *host,
return 0;
}
-static int __init atmel_pmecc_nand_init_params(struct platform_device *pdev,
+static int atmel_pmecc_nand_init_params(struct platform_device *pdev,
struct atmel_nand_host *host)
{
struct mtd_info *mtd = &host->mtd;
@@ -1249,6 +1220,7 @@ static int __init atmel_pmecc_nand_init_params(struct platform_device *pdev,
goto err;
}
+ nand_chip->options |= NAND_NO_SUBPAGE_WRITE;
nand_chip->ecc.read_page = atmel_nand_pmecc_read_page;
nand_chip->ecc.write_page = atmel_nand_pmecc_write_page;
@@ -1449,7 +1421,6 @@ static void atmel_nand_hwctl(struct mtd_info *mtd, int mode)
ecc_writel(host->ecc, CR, ATMEL_ECC_RST);
}
-#if defined(CONFIG_OF)
static int atmel_of_init_port(struct atmel_nand_host *host,
struct device_node *np)
{
@@ -1457,7 +1428,7 @@ static int atmel_of_init_port(struct atmel_nand_host *host,
u32 offset[2];
int ecc_mode;
struct atmel_nand_data *board = &host->board;
- enum of_gpio_flags flags;
+ enum of_gpio_flags flags = 0;
if (of_property_read_u32(np, "atmel,nand-addr-offset", &val) == 0) {
if (val >= 32) {
@@ -1540,15 +1511,8 @@ static int atmel_of_init_port(struct atmel_nand_host *host,
return 0;
}
-#else
-static int atmel_of_init_port(struct atmel_nand_host *host,
- struct device_node *np)
-{
- return -EINVAL;
-}
-#endif
-static int __init atmel_hw_nand_init_params(struct platform_device *pdev,
+static int atmel_hw_nand_init_params(struct platform_device *pdev,
struct atmel_nand_host *host)
{
struct mtd_info *mtd = &host->mtd;
@@ -1696,8 +1660,8 @@ static void nfc_select_chip(struct mtd_info *mtd, int chip)
nfc_writel(host->nfc->hsmc_regs, CTRL, NFC_CTRL_ENABLE);
}
-static int nfc_make_addr(struct mtd_info *mtd, int column, int page_addr,
- unsigned int *addr1234, unsigned int *cycle0)
+static int nfc_make_addr(struct mtd_info *mtd, int command, int column,
+ int page_addr, unsigned int *addr1234, unsigned int *cycle0)
{
struct nand_chip *chip = mtd->priv;
@@ -1711,7 +1675,8 @@ static int nfc_make_addr(struct mtd_info *mtd, int column, int page_addr,
*addr1234 = 0;
if (column != -1) {
- if (chip->options & NAND_BUSWIDTH_16)
+ if (chip->options & NAND_BUSWIDTH_16 &&
+ !nand_opcode_8bits(command))
column >>= 1;
addr_bytes[acycle++] = column & 0xff;
if (mtd->writesize > 512)
@@ -1824,8 +1789,8 @@ static void nfc_nand_command(struct mtd_info *mtd, unsigned int command,
}
if (do_addr)
- acycle = nfc_make_addr(mtd, column, page_addr, &addr1234,
- &cycle0);
+ acycle = nfc_make_addr(mtd, command, column, page_addr,
+ &addr1234, &cycle0);
nfc_addr_cmd = cmd1 | cmd2 | vcmd2 | acycle | csid | dataen | nfcwr;
nfc_send_command(host, nfc_addr_cmd, addr1234, cycle0);
@@ -1987,7 +1952,7 @@ static struct platform_driver atmel_nand_nfc_driver;
/*
* Probe for the NAND device.
*/
-static int __init atmel_nand_probe(struct platform_device *pdev)
+static int atmel_nand_probe(struct platform_device *pdev)
{
struct atmel_nand_host *host;
struct mtd_info *mtd;
@@ -1998,10 +1963,8 @@ static int __init atmel_nand_probe(struct platform_device *pdev)
/* Allocate memory for the device structure (and zero it) */
host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL);
- if (!host) {
- printk(KERN_ERR "atmel_nand: failed to allocate device structure.\n");
+ if (!host)
return -ENOMEM;
- }
res = platform_driver_register(&atmel_nand_nfc_driver);
if (res)
@@ -2019,7 +1982,8 @@ static int __init atmel_nand_probe(struct platform_device *pdev)
mtd = &host->mtd;
nand_chip = &host->nand_chip;
host->dev = &pdev->dev;
- if (pdev->dev.of_node) {
+ if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) {
+ /* Only when CONFIG_OF is enabled of_node can be parsed */
res = atmel_of_init_port(host, pdev->dev.of_node);
if (res)
goto err_nand_ioremap;
@@ -2098,14 +2062,14 @@ static int __init atmel_nand_probe(struct platform_device *pdev)
}
if (gpio_get_value(host->board.det_pin)) {
- printk(KERN_INFO "No SmartMedia card inserted.\n");
+ dev_info(&pdev->dev, "No SmartMedia card inserted.\n");
res = -ENXIO;
goto err_no_card;
}
}
if (host->board.on_flash_bbt || on_flash_bbt) {
- printk(KERN_INFO "atmel_nand: Use On Flash BBT\n");
+ dev_info(&pdev->dev, "Use On Flash BBT\n");
nand_chip->bbt_options |= NAND_BBT_USE_FLASH;
}
@@ -2177,14 +2141,13 @@ err_no_card:
if (host->dma_chan)
dma_release_channel(host->dma_chan);
err_nand_ioremap:
- platform_driver_unregister(&atmel_nand_nfc_driver);
return res;
}
/*
* Remove a NAND device.
*/
-static int __exit atmel_nand_remove(struct platform_device *pdev)
+static int atmel_nand_remove(struct platform_device *pdev)
{
struct atmel_nand_host *host = platform_get_drvdata(pdev);
struct mtd_info *mtd = &host->mtd;
@@ -2207,14 +2170,12 @@ static int __exit atmel_nand_remove(struct platform_device *pdev)
return 0;
}
-#if defined(CONFIG_OF)
static const struct of_device_id atmel_nand_dt_ids[] = {
{ .compatible = "atmel,at91rm9200-nand" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, atmel_nand_dt_ids);
-#endif
static int atmel_nand_nfc_probe(struct platform_device *pdev)
{
@@ -2253,12 +2214,11 @@ static int atmel_nand_nfc_probe(struct platform_device *pdev)
return 0;
}
-#if defined(CONFIG_OF)
-static struct of_device_id atmel_nand_nfc_match[] = {
+static const struct of_device_id atmel_nand_nfc_match[] = {
{ .compatible = "atmel,sama5d3-nfc" },
{ /* sentinel */ }
};
-#endif
+MODULE_DEVICE_TABLE(of, atmel_nand_nfc_match);
static struct platform_driver atmel_nand_nfc_driver = {
.driver = {
@@ -2270,7 +2230,8 @@ static struct platform_driver atmel_nand_nfc_driver = {
};
static struct platform_driver atmel_nand_driver = {
- .remove = __exit_p(atmel_nand_remove),
+ .probe = atmel_nand_probe,
+ .remove = atmel_nand_remove,
.driver = {
.name = "atmel_nand",
.owner = THIS_MODULE,
@@ -2278,7 +2239,7 @@ static struct platform_driver atmel_nand_driver = {
},
};
-module_platform_driver_probe(atmel_nand_driver, atmel_nand_probe);
+module_platform_driver(atmel_nand_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Rick Bronson");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-05 02:16:33 +0000