summaryrefslogtreecommitdiff
path: root/drivers/mtd/nand/s3c2410.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/mtd/nand/s3c2410.c')
-rw-r--r--drivers/mtd/nand/s3c2410.c191
1 files changed, 76 insertions, 115 deletions
diff --git a/drivers/mtd/nand/s3c2410.c b/drivers/mtd/nand/s3c2410.c
index d804061..295e4be 100644
--- a/drivers/mtd/nand/s3c2410.c
+++ b/drivers/mtd/nand/s3c2410.c
@@ -21,6 +21,8 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
+#define pr_fmt(fmt) "nand-s3c2410: " fmt
+
#ifdef CONFIG_MTD_NAND_S3C2410_DEBUG
#define DEBUG
#endif
@@ -30,6 +32,7 @@
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/string.h>
+#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
@@ -43,24 +46,9 @@
#include <linux/mtd/nand_ecc.h>
#include <linux/mtd/partitions.h>
-#include <asm/io.h>
-
#include <plat/regs-nand.h>
#include <linux/platform_data/mtd-nand-s3c2410.h>
-#ifdef CONFIG_MTD_NAND_S3C2410_HWECC
-static int hardware_ecc = 1;
-#else
-static int hardware_ecc = 0;
-#endif
-
-#ifdef CONFIG_MTD_NAND_S3C2410_CLKSTOP
-static const int clock_stop = 1;
-#else
-static const int clock_stop = 0;
-#endif
-
-
/* new oob placement block for use with hardware ecc generation
*/
@@ -109,9 +97,8 @@ enum s3c_nand_clk_state {
* @mtds: An array of MTD instances on this controoler.
* @platform: The platform data for this board.
* @device: The platform device we bound to.
- * @area: The IO area resource that came from request_mem_region().
* @clk: The clock resource for this controller.
- * @regs: The area mapped for the hardware registers described by @area.
+ * @regs: The area mapped for the hardware registers.
* @sel_reg: Pointer to the register controlling the NAND selection.
* @sel_bit: The bit in @sel_reg to select the NAND chip.
* @mtd_count: The number of MTDs created from this controller.
@@ -128,7 +115,6 @@ struct s3c2410_nand_info {
/* device info */
struct device *device;
- struct resource *area;
struct clk *clk;
void __iomem *regs;
void __iomem *sel_reg;
@@ -169,7 +155,11 @@ static struct s3c2410_platform_nand *to_nand_plat(struct platform_device *dev)
static inline int allow_clk_suspend(struct s3c2410_nand_info *info)
{
- return clock_stop;
+#ifdef CONFIG_MTD_NAND_S3C2410_CLKSTOP
+ return 1;
+#else
+ return 0;
+#endif
}
/**
@@ -215,7 +205,8 @@ static int s3c_nand_calc_rate(int wanted, unsigned long clk, int max)
pr_debug("result %d from %ld, %d\n", result, clk, wanted);
if (result > max) {
- printk("%d ns is too big for current clock rate %ld\n", wanted, clk);
+ pr_err("%d ns is too big for current clock rate %ld\n",
+ wanted, clk);
return -1;
}
@@ -225,7 +216,7 @@ static int s3c_nand_calc_rate(int wanted, unsigned long clk, int max)
return result;
}
-#define to_ns(ticks,clk) (((ticks) * NS_IN_KHZ) / (unsigned int)(clk))
+#define to_ns(ticks, clk) (((ticks) * NS_IN_KHZ) / (unsigned int)(clk))
/* controller setup */
@@ -268,7 +259,8 @@ static int s3c2410_nand_setrate(struct s3c2410_nand_info *info)
}
dev_info(info->device, "Tacls=%d, %dns Twrph0=%d %dns, Twrph1=%d %dns\n",
- tacls, to_ns(tacls, clkrate), twrph0, to_ns(twrph0, clkrate), twrph1, to_ns(twrph1, clkrate));
+ tacls, to_ns(tacls, clkrate), twrph0, to_ns(twrph0, clkrate),
+ twrph1, to_ns(twrph1, clkrate));
switch (info->cpu_type) {
case TYPE_S3C2410:
@@ -325,13 +317,13 @@ static int s3c2410_nand_inithw(struct s3c2410_nand_info *info)
if (ret < 0)
return ret;
- switch (info->cpu_type) {
- case TYPE_S3C2410:
+ switch (info->cpu_type) {
+ case TYPE_S3C2410:
default:
break;
- case TYPE_S3C2440:
- case TYPE_S3C2412:
+ case TYPE_S3C2440:
+ case TYPE_S3C2412:
/* enable the controller and de-assert nFCE */
writel(S3C2440_NFCONT_ENABLE, info->regs + S3C2440_NFCONT);
@@ -450,6 +442,7 @@ static int s3c2412_nand_devready(struct mtd_info *mtd)
/* ECC handling functions */
+#ifdef CONFIG_MTD_NAND_S3C2410_HWECC
static int s3c2410_nand_correct_data(struct mtd_info *mtd, u_char *dat,
u_char *read_ecc, u_char *calc_ecc)
{
@@ -463,10 +456,8 @@ static int s3c2410_nand_correct_data(struct mtd_info *mtd, u_char *dat,
diff1 = read_ecc[1] ^ calc_ecc[1];
diff2 = read_ecc[2] ^ calc_ecc[2];
- pr_debug("%s: rd %02x%02x%02x calc %02x%02x%02x diff %02x%02x%02x\n",
- __func__,
- read_ecc[0], read_ecc[1], read_ecc[2],
- calc_ecc[0], calc_ecc[1], calc_ecc[2],
+ pr_debug("%s: rd %*phN calc %*phN diff %02x%02x%02x\n",
+ __func__, 3, read_ecc, 3, calc_ecc,
diff0, diff1, diff2);
if (diff0 == 0 && diff1 == 0 && diff2 == 0)
@@ -546,7 +537,8 @@ static void s3c2412_nand_enable_hwecc(struct mtd_info *mtd, int mode)
unsigned long ctrl;
ctrl = readl(info->regs + S3C2440_NFCONT);
- writel(ctrl | S3C2412_NFCONT_INIT_MAIN_ECC, info->regs + S3C2440_NFCONT);
+ writel(ctrl | S3C2412_NFCONT_INIT_MAIN_ECC,
+ info->regs + S3C2440_NFCONT);
}
static void s3c2440_nand_enable_hwecc(struct mtd_info *mtd, int mode)
@@ -558,7 +550,8 @@ static void s3c2440_nand_enable_hwecc(struct mtd_info *mtd, int mode)
writel(ctrl | S3C2440_NFCONT_INITECC, info->regs + S3C2440_NFCONT);
}
-static int s3c2410_nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat, u_char *ecc_code)
+static int s3c2410_nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat,
+ u_char *ecc_code)
{
struct s3c2410_nand_info *info = s3c2410_nand_mtd_toinfo(mtd);
@@ -566,13 +559,13 @@ static int s3c2410_nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat, u
ecc_code[1] = readb(info->regs + S3C2410_NFECC + 1);
ecc_code[2] = readb(info->regs + S3C2410_NFECC + 2);
- pr_debug("%s: returning ecc %02x%02x%02x\n", __func__,
- ecc_code[0], ecc_code[1], ecc_code[2]);
+ pr_debug("%s: returning ecc %*phN\n", __func__, 3, ecc_code);
return 0;
}
-static int s3c2412_nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat, u_char *ecc_code)
+static int s3c2412_nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat,
+ u_char *ecc_code)
{
struct s3c2410_nand_info *info = s3c2410_nand_mtd_toinfo(mtd);
unsigned long ecc = readl(info->regs + S3C2412_NFMECC0);
@@ -581,12 +574,13 @@ static int s3c2412_nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat, u
ecc_code[1] = ecc >> 8;
ecc_code[2] = ecc >> 16;
- pr_debug("calculate_ecc: returning ecc %02x,%02x,%02x\n", ecc_code[0], ecc_code[1], ecc_code[2]);
+ pr_debug("%s: returning ecc %*phN\n", __func__, 3, ecc_code);
return 0;
}
-static int s3c2440_nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat, u_char *ecc_code)
+static int s3c2440_nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat,
+ u_char *ecc_code)
{
struct s3c2410_nand_info *info = s3c2410_nand_mtd_toinfo(mtd);
unsigned long ecc = readl(info->regs + S3C2440_NFMECC0);
@@ -599,6 +593,7 @@ static int s3c2440_nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat, u
return 0;
}
+#endif
/* over-ride the standard functions for a little more speed. We can
* use read/write block to move the data buffers to/from the controller
@@ -625,13 +620,15 @@ static void s3c2440_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
}
}
-static void s3c2410_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len)
+static void s3c2410_nand_write_buf(struct mtd_info *mtd, const u_char *buf,
+ int len)
{
struct nand_chip *this = mtd->priv;
writesb(this->IO_ADDR_W, buf, len);
}
-static void s3c2440_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len)
+static void s3c2440_nand_write_buf(struct mtd_info *mtd, const u_char *buf,
+ int len)
{
struct s3c2410_nand_info *info = s3c2410_nand_mtd_toinfo(mtd);
@@ -675,7 +672,8 @@ static inline int s3c2410_nand_cpufreq_register(struct s3c2410_nand_info *info)
CPUFREQ_TRANSITION_NOTIFIER);
}
-static inline void s3c2410_nand_cpufreq_deregister(struct s3c2410_nand_info *info)
+static inline void
+s3c2410_nand_cpufreq_deregister(struct s3c2410_nand_info *info)
{
cpufreq_unregister_notifier(&info->freq_transition,
CPUFREQ_TRANSITION_NOTIFIER);
@@ -687,7 +685,8 @@ static inline int s3c2410_nand_cpufreq_register(struct s3c2410_nand_info *info)
return 0;
}
-static inline void s3c2410_nand_cpufreq_deregister(struct s3c2410_nand_info *info)
+static inline void
+s3c2410_nand_cpufreq_deregister(struct s3c2410_nand_info *info)
{
}
#endif
@@ -717,29 +716,12 @@ static int s3c24xx_nand_remove(struct platform_device *pdev)
pr_debug("releasing mtd %d (%p)\n", mtdno, ptr);
nand_release(&ptr->mtd);
}
-
- kfree(info->mtds);
}
/* free the common resources */
- if (!IS_ERR(info->clk)) {
+ if (!IS_ERR(info->clk))
s3c2410_nand_clk_set_state(info, CLOCK_DISABLE);
- clk_put(info->clk);
- }
-
- if (info->regs != NULL) {
- iounmap(info->regs);
- info->regs = NULL;
- }
-
- if (info->area != NULL) {
- release_resource(info->area);
- kfree(info->area);
- info->area = NULL;
- }
-
- kfree(info);
return 0;
}
@@ -810,7 +792,7 @@ static void s3c2410_nand_init_chip(struct s3c2410_nand_info *info,
dev_info(info->device, "System booted from NAND\n");
break;
- }
+ }
chip->IO_ADDR_R = chip->IO_ADDR_W;
@@ -819,32 +801,31 @@ static void s3c2410_nand_init_chip(struct s3c2410_nand_info *info,
nmtd->mtd.owner = THIS_MODULE;
nmtd->set = set;
- if (hardware_ecc) {
+#ifdef CONFIG_MTD_NAND_S3C2410_HWECC
+ chip->ecc.calculate = s3c2410_nand_calculate_ecc;
+ chip->ecc.correct = s3c2410_nand_correct_data;
+ chip->ecc.mode = NAND_ECC_HW;
+ chip->ecc.strength = 1;
+
+ switch (info->cpu_type) {
+ case TYPE_S3C2410:
+ chip->ecc.hwctl = s3c2410_nand_enable_hwecc;
chip->ecc.calculate = s3c2410_nand_calculate_ecc;
- chip->ecc.correct = s3c2410_nand_correct_data;
- chip->ecc.mode = NAND_ECC_HW;
- chip->ecc.strength = 1;
-
- switch (info->cpu_type) {
- case TYPE_S3C2410:
- chip->ecc.hwctl = s3c2410_nand_enable_hwecc;
- chip->ecc.calculate = s3c2410_nand_calculate_ecc;
- break;
-
- case TYPE_S3C2412:
- chip->ecc.hwctl = s3c2412_nand_enable_hwecc;
- chip->ecc.calculate = s3c2412_nand_calculate_ecc;
- break;
-
- case TYPE_S3C2440:
- chip->ecc.hwctl = s3c2440_nand_enable_hwecc;
- chip->ecc.calculate = s3c2440_nand_calculate_ecc;
- break;
+ break;
- }
- } else {
- chip->ecc.mode = NAND_ECC_SOFT;
+ case TYPE_S3C2412:
+ chip->ecc.hwctl = s3c2412_nand_enable_hwecc;
+ chip->ecc.calculate = s3c2412_nand_calculate_ecc;
+ break;
+
+ case TYPE_S3C2440:
+ chip->ecc.hwctl = s3c2440_nand_enable_hwecc;
+ chip->ecc.calculate = s3c2440_nand_calculate_ecc;
+ break;
}
+#else
+ chip->ecc.mode = NAND_ECC_SOFT;
+#endif
if (set->ecc_layout != NULL)
chip->ecc.layout = set->ecc_layout;
@@ -921,7 +902,7 @@ static void s3c2410_nand_update_chip(struct s3c2410_nand_info *info,
static int s3c24xx_nand_probe(struct platform_device *pdev)
{
struct s3c2410_platform_nand *plat = to_nand_plat(pdev);
- enum s3c_cpu_type cpu_type;
+ enum s3c_cpu_type cpu_type;
struct s3c2410_nand_info *info;
struct s3c2410_nand_mtd *nmtd;
struct s3c2410_nand_set *sets;
@@ -935,7 +916,7 @@ static int s3c24xx_nand_probe(struct platform_device *pdev)
pr_debug("s3c2410_nand_probe(%p)\n", pdev);
- info = kzalloc(sizeof(*info), GFP_KERNEL);
+ info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
if (info == NULL) {
dev_err(&pdev->dev, "no memory for flash info\n");
err = -ENOMEM;
@@ -949,7 +930,7 @@ static int s3c24xx_nand_probe(struct platform_device *pdev)
/* get the clock source and enable it */
- info->clk = clk_get(&pdev->dev, "nand");
+ info->clk = devm_clk_get(&pdev->dev, "nand");
if (IS_ERR(info->clk)) {
dev_err(&pdev->dev, "failed to get clock\n");
err = -ENOENT;
@@ -961,22 +942,14 @@ static int s3c24xx_nand_probe(struct platform_device *pdev)
/* allocate and map the resource */
/* currently we assume we have the one resource */
- res = pdev->resource;
+ res = pdev->resource;
size = resource_size(res);
- info->area = request_mem_region(res->start, size, pdev->name);
-
- if (info->area == NULL) {
- dev_err(&pdev->dev, "cannot reserve register region\n");
- err = -ENOENT;
- goto exit_error;
- }
-
- info->device = &pdev->dev;
- info->platform = plat;
- info->regs = ioremap(res->start, size);
- info->cpu_type = cpu_type;
+ info->device = &pdev->dev;
+ info->platform = plat;
+ info->cpu_type = cpu_type;
+ info->regs = devm_request_and_ioremap(&pdev->dev, res);
if (info->regs == NULL) {
dev_err(&pdev->dev, "cannot reserve register region\n");
err = -EIO;
@@ -999,7 +972,7 @@ static int s3c24xx_nand_probe(struct platform_device *pdev)
/* allocate our information */
size = nr_sets * sizeof(*info->mtds);
- info->mtds = kzalloc(size, GFP_KERNEL);
+ info->mtds = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
if (info->mtds == NULL) {
dev_err(&pdev->dev, "failed to allocate mtd storage\n");
err = -ENOMEM;
@@ -1011,7 +984,8 @@ static int s3c24xx_nand_probe(struct platform_device *pdev)
nmtd = info->mtds;
for (setno = 0; setno < nr_sets; setno++, nmtd++) {
- pr_debug("initialising set %d (%p, info %p)\n", setno, nmtd, info);
+ pr_debug("initialising set %d (%p, info %p)\n",
+ setno, nmtd, info);
s3c2410_nand_init_chip(info, nmtd, sets);
@@ -1134,20 +1108,7 @@ static struct platform_driver s3c24xx_nand_driver = {
},
};
-static int __init s3c2410_nand_init(void)
-{
- printk("S3C24XX NAND Driver, (c) 2004 Simtec Electronics\n");
-
- return platform_driver_register(&s3c24xx_nand_driver);
-}
-
-static void __exit s3c2410_nand_exit(void)
-{
- platform_driver_unregister(&s3c24xx_nand_driver);
-}
-
-module_init(s3c2410_nand_init);
-module_exit(s3c2410_nand_exit);
+module_platform_driver(s3c24xx_nand_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
generated by cgit v0.10.2 at 2024-08-25 06:50:49 (GMT)