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path: root/drivers/mtd/nand/ndfc.c
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Diffstat (limited to 'drivers/mtd/nand/ndfc.c')
-rw-r--r--drivers/mtd/nand/ndfc.c118
1 files changed, 44 insertions, 74 deletions
diff --git a/drivers/mtd/nand/ndfc.c b/drivers/mtd/nand/ndfc.c
index c9ae0a5023b..69eaba690a9 100644
--- a/drivers/mtd/nand/ndfc.c
+++ b/drivers/mtd/nand/ndfc.c
@@ -30,9 +30,11 @@
#include <linux/mtd/ndfc.h>
#include <linux/slab.h>
#include <linux/mtd/mtd.h>
+#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <asm/io.h>
+#define NDFC_MAX_CS 4
struct ndfc_controller {
struct platform_device *ofdev;
@@ -41,17 +43,15 @@ struct ndfc_controller {
struct nand_chip chip;
int chip_select;
struct nand_hw_control ndfc_control;
-#ifdef CONFIG_MTD_PARTITIONS
- struct mtd_partition *parts;
-#endif
};
-static struct ndfc_controller ndfc_ctrl;
+static struct ndfc_controller ndfc_ctrl[NDFC_MAX_CS];
static void ndfc_select_chip(struct mtd_info *mtd, int chip)
{
uint32_t ccr;
- struct ndfc_controller *ndfc = &ndfc_ctrl;
+ struct nand_chip *nchip = mtd->priv;
+ struct ndfc_controller *ndfc = nchip->priv;
ccr = in_be32(ndfc->ndfcbase + NDFC_CCR);
if (chip >= 0) {
@@ -64,7 +64,8 @@ static void ndfc_select_chip(struct mtd_info *mtd, int chip)
static void ndfc_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
{
- struct ndfc_controller *ndfc = &ndfc_ctrl;
+ struct nand_chip *chip = mtd->priv;
+ struct ndfc_controller *ndfc = chip->priv;
if (cmd == NAND_CMD_NONE)
return;
@@ -77,7 +78,8 @@ static void ndfc_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
static int ndfc_ready(struct mtd_info *mtd)
{
- struct ndfc_controller *ndfc = &ndfc_ctrl;
+ struct nand_chip *chip = mtd->priv;
+ struct ndfc_controller *ndfc = chip->priv;
return in_be32(ndfc->ndfcbase + NDFC_STAT) & NDFC_STAT_IS_READY;
}
@@ -85,7 +87,8 @@ static int ndfc_ready(struct mtd_info *mtd)
static void ndfc_enable_hwecc(struct mtd_info *mtd, int mode)
{
uint32_t ccr;
- struct ndfc_controller *ndfc = &ndfc_ctrl;
+ struct nand_chip *chip = mtd->priv;
+ struct ndfc_controller *ndfc = chip->priv;
ccr = in_be32(ndfc->ndfcbase + NDFC_CCR);
ccr |= NDFC_CCR_RESET_ECC;
@@ -96,7 +99,8 @@ static void ndfc_enable_hwecc(struct mtd_info *mtd, int mode)
static int ndfc_calculate_ecc(struct mtd_info *mtd,
const u_char *dat, u_char *ecc_code)
{
- struct ndfc_controller *ndfc = &ndfc_ctrl;
+ struct nand_chip *chip = mtd->priv;
+ struct ndfc_controller *ndfc = chip->priv;
uint32_t ecc;
uint8_t *p = (uint8_t *)&ecc;
@@ -119,7 +123,8 @@ static int ndfc_calculate_ecc(struct mtd_info *mtd,
*/
static void ndfc_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
{
- struct ndfc_controller *ndfc = &ndfc_ctrl;
+ struct nand_chip *chip = mtd->priv;
+ struct ndfc_controller *ndfc = chip->priv;
uint32_t *p = (uint32_t *) buf;
for(;len > 0; len -= 4)
@@ -128,39 +133,23 @@ static void ndfc_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
static void ndfc_write_buf(struct mtd_info *mtd, const uint8_t *buf, int len)
{
- struct ndfc_controller *ndfc = &ndfc_ctrl;
+ struct nand_chip *chip = mtd->priv;
+ struct ndfc_controller *ndfc = chip->priv;
uint32_t *p = (uint32_t *) buf;
for(;len > 0; len -= 4)
out_be32(ndfc->ndfcbase + NDFC_DATA, *p++);
}
-static int ndfc_verify_buf(struct mtd_info *mtd, const uint8_t *buf, int len)
-{
- struct ndfc_controller *ndfc = &ndfc_ctrl;
- uint32_t *p = (uint32_t *) buf;
-
- for(;len > 0; len -= 4)
- if (*p++ != in_be32(ndfc->ndfcbase + NDFC_DATA))
- return -EFAULT;
- return 0;
-}
-
/*
* Initialize chip structure
*/
static int ndfc_chip_init(struct ndfc_controller *ndfc,
struct device_node *node)
{
-#ifdef CONFIG_MTD_PARTITIONS
-#ifdef CONFIG_MTD_CMDLINE_PARTS
- static const char *part_types[] = { "cmdlinepart", NULL };
-#else
- static const char *part_types[] = { NULL };
-#endif
-#endif
struct device_node *flash_np;
struct nand_chip *chip = &ndfc->chip;
+ struct mtd_part_parser_data ppdata;
int ret;
chip->IO_ADDR_R = ndfc->ndfcbase + NDFC_DATA;
@@ -172,13 +161,14 @@ static int ndfc_chip_init(struct ndfc_controller *ndfc,
chip->controller = &ndfc->ndfc_control;
chip->read_buf = ndfc_read_buf;
chip->write_buf = ndfc_write_buf;
- chip->verify_buf = ndfc_verify_buf;
chip->ecc.correct = nand_correct_data;
chip->ecc.hwctl = ndfc_enable_hwecc;
chip->ecc.calculate = ndfc_calculate_ecc;
chip->ecc.mode = NAND_ECC_HW;
chip->ecc.size = 256;
chip->ecc.bytes = 3;
+ chip->ecc.strength = 1;
+ chip->priv = ndfc;
ndfc->mtd.priv = chip;
ndfc->mtd.owner = THIS_MODULE;
@@ -187,6 +177,7 @@ static int ndfc_chip_init(struct ndfc_controller *ndfc,
if (!flash_np)
return -ENODEV;
+ ppdata.of_node = flash_np;
ndfc->mtd.name = kasprintf(GFP_KERNEL, "%s.%s",
dev_name(&ndfc->ofdev->dev), flash_np->name);
if (!ndfc->mtd.name) {
@@ -198,25 +189,7 @@ static int ndfc_chip_init(struct ndfc_controller *ndfc,
if (ret)
goto err;
-#ifdef CONFIG_MTD_PARTITIONS
- ret = parse_mtd_partitions(&ndfc->mtd, part_types, &ndfc->parts, 0);
- if (ret < 0)
- goto err;
-
-#ifdef CONFIG_MTD_OF_PARTS
- if (ret == 0) {
- ret = of_mtd_parse_partitions(&ndfc->ofdev->dev, flash_np,
- &ndfc->parts);
- if (ret < 0)
- goto err;
- }
-#endif
-
- if (ret > 0)
- ret = add_mtd_partitions(&ndfc->mtd, ndfc->parts, ret);
- else
-#endif
- ret = add_mtd_device(&ndfc->mtd);
+ ret = mtd_device_parse_register(&ndfc->mtd, NULL, &ppdata, NULL, 0);
err:
of_node_put(flash_np);
@@ -225,18 +198,12 @@ err:
return ret;
}
-static int __devinit ndfc_probe(struct platform_device *ofdev,
- const struct of_device_id *match)
+static int ndfc_probe(struct platform_device *ofdev)
{
- struct ndfc_controller *ndfc = &ndfc_ctrl;
+ struct ndfc_controller *ndfc;
const __be32 *reg;
u32 ccr;
- int err, len;
-
- spin_lock_init(&ndfc->ndfc_control.lock);
- init_waitqueue_head(&ndfc->ndfc_control.wq);
- ndfc->ofdev = ofdev;
- dev_set_drvdata(&ofdev->dev, ndfc);
+ int err, len, cs;
/* Read the reg property to get the chip select */
reg = of_get_property(ofdev->dev.of_node, "reg", &len);
@@ -244,7 +211,20 @@ static int __devinit ndfc_probe(struct platform_device *ofdev,
dev_err(&ofdev->dev, "unable read reg property (%d)\n", len);
return -ENOENT;
}
- ndfc->chip_select = be32_to_cpu(reg[0]);
+
+ cs = be32_to_cpu(reg[0]);
+ if (cs >= NDFC_MAX_CS) {
+ dev_err(&ofdev->dev, "invalid CS number (%d)\n", cs);
+ return -EINVAL;
+ }
+
+ ndfc = &ndfc_ctrl[cs];
+ ndfc->chip_select = cs;
+
+ spin_lock_init(&ndfc->ndfc_control.lock);
+ init_waitqueue_head(&ndfc->ndfc_control.wq);
+ ndfc->ofdev = ofdev;
+ dev_set_drvdata(&ofdev->dev, ndfc);
ndfc->ndfcbase = of_iomap(ofdev->dev.of_node, 0);
if (!ndfc->ndfcbase) {
@@ -277,11 +257,12 @@ static int __devinit ndfc_probe(struct platform_device *ofdev,
return 0;
}
-static int __devexit ndfc_remove(struct platform_device *ofdev)
+static int ndfc_remove(struct platform_device *ofdev)
{
struct ndfc_controller *ndfc = dev_get_drvdata(&ofdev->dev);
nand_release(&ndfc->mtd);
+ kfree(ndfc->mtd.name);
return 0;
}
@@ -292,28 +273,17 @@ static const struct of_device_id ndfc_match[] = {
};
MODULE_DEVICE_TABLE(of, ndfc_match);
-static struct of_platform_driver ndfc_driver = {
+static struct platform_driver ndfc_driver = {
.driver = {
.name = "ndfc",
.owner = THIS_MODULE,
.of_match_table = ndfc_match,
},
.probe = ndfc_probe,
- .remove = __devexit_p(ndfc_remove),
+ .remove = ndfc_remove,
};
-static int __init ndfc_nand_init(void)
-{
- return of_register_platform_driver(&ndfc_driver);
-}
-
-static void __exit ndfc_nand_exit(void)
-{
- of_unregister_platform_driver(&ndfc_driver);
-}
-
-module_init(ndfc_nand_init);
-module_exit(ndfc_nand_exit);
+module_platform_driver(ndfc_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Thomas Gleixner <tglx@linutronix.de>");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 14:20:29 +0000