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path: root/drivers/mtd/onenand/omap2.c
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Diffstat (limited to 'drivers/mtd/onenand/omap2.c')
-rw-r--r--drivers/mtd/onenand/omap2.c115
1 files changed, 70 insertions, 45 deletions
diff --git a/drivers/mtd/onenand/omap2.c b/drivers/mtd/onenand/omap2.c
index 9f322f1a7f22..14a49abe057e 100644
--- a/drivers/mtd/onenand/omap2.c
+++ b/drivers/mtd/onenand/omap2.c
@@ -35,6 +35,7 @@
#include <linux/dma-mapping.h>
#include <linux/io.h>
#include <linux/slab.h>
+#include <linux/regulator/consumer.h>
#include <asm/mach/flash.h>
#include <plat/gpmc.h>
@@ -62,9 +63,14 @@ struct omap2_onenand {
struct completion dma_done;
int dma_channel;
int freq;
- int (*setup)(void __iomem *base, int freq);
+ int (*setup)(void __iomem *base, int *freq_ptr);
+ struct regulator *regulator;
};
+#ifdef CONFIG_MTD_PARTITIONS
+static const char *part_probes[] = { "cmdlinepart", NULL, };
+#endif
+
static void omap2_onenand_dma_cb(int lch, u16 ch_status, void *data)
{
struct omap2_onenand *c = data;
@@ -108,8 +114,9 @@ static void wait_warn(char *msg, int state, unsigned int ctrl,
static int omap2_onenand_wait(struct mtd_info *mtd, int state)
{
struct omap2_onenand *c = container_of(mtd, struct omap2_onenand, mtd);
+ struct onenand_chip *this = mtd->priv;
unsigned int intr = 0;
- unsigned int ctrl;
+ unsigned int ctrl, ctrl_mask;
unsigned long timeout;
u32 syscfg;
@@ -141,11 +148,9 @@ static int omap2_onenand_wait(struct mtd_info *mtd, int state)
wait_err("controller error", state, ctrl, intr);
return -EIO;
}
- if ((intr & intr_flags) != intr_flags) {
- wait_err("timeout", state, ctrl, intr);
- return -EIO;
- }
- return 0;
+ if ((intr & intr_flags) == intr_flags)
+ return 0;
+ /* Continue in wait for interrupt branch */
}
if (state != FL_READING) {
@@ -180,7 +185,8 @@ retry:
if (result == 0) {
/* Timeout after 20ms */
ctrl = read_reg(c, ONENAND_REG_CTRL_STATUS);
- if (ctrl & ONENAND_CTRL_ONGO) {
+ if (ctrl & ONENAND_CTRL_ONGO &&
+ !this->ongoing) {
/*
* The operation seems to be still going
* so give it some more time.
@@ -269,7 +275,11 @@ retry:
return -EIO;
}
- if (ctrl & 0xFE9F)
+ ctrl_mask = 0xFE9F;
+ if (this->ongoing)
+ ctrl_mask &= ~0x8000;
+
+ if (ctrl & ctrl_mask)
wait_warn("unexpected controller status", state, ctrl, intr);
return 0;
@@ -569,7 +579,7 @@ static int __adjust_timing(struct device *dev, void *data)
/* DMA is not in use so this is all that is needed */
/* Revisit for OMAP3! */
- ret = c->setup(c->onenand.base, c->freq);
+ ret = c->setup(c->onenand.base, &c->freq);
return ret;
}
@@ -591,6 +601,30 @@ static void omap2_onenand_shutdown(struct platform_device *pdev)
memset((__force void *)c->onenand.base, 0, ONENAND_BUFRAM_SIZE);
}
+static int omap2_onenand_enable(struct mtd_info *mtd)
+{
+ int ret;
+ struct omap2_onenand *c = container_of(mtd, struct omap2_onenand, mtd);
+
+ ret = regulator_enable(c->regulator);
+ if (ret != 0)
+ dev_err(&c->pdev->dev, "cant enable regulator\n");
+
+ return ret;
+}
+
+static int omap2_onenand_disable(struct mtd_info *mtd)
+{
+ int ret;
+ struct omap2_onenand *c = container_of(mtd, struct omap2_onenand, mtd);
+
+ ret = regulator_disable(c->regulator);
+ if (ret != 0)
+ dev_err(&c->pdev->dev, "cant disable regulator\n");
+
+ return ret;
+}
+
static int __devinit omap2_onenand_probe(struct platform_device *pdev)
{
struct omap_onenand_platform_data *pdata;
@@ -637,7 +671,7 @@ static int __devinit omap2_onenand_probe(struct platform_device *pdev)
}
if (pdata->onenand_setup != NULL) {
- r = pdata->onenand_setup(c->onenand.base, c->freq);
+ r = pdata->onenand_setup(c->onenand.base, &c->freq);
if (r < 0) {
dev_err(&pdev->dev, "Onenand platform setup failed: "
"%d\n", r);
@@ -682,8 +716,8 @@ static int __devinit omap2_onenand_probe(struct platform_device *pdev)
}
dev_info(&pdev->dev, "initializing on CS%d, phys base 0x%08lx, virtual "
- "base %p\n", c->gpmc_cs, c->phys_base,
- c->onenand.base);
+ "base %p, freq %d MHz\n", c->gpmc_cs, c->phys_base,
+ c->onenand.base, c->freq);
c->pdev = pdev;
c->mtd.name = dev_name(&pdev->dev);
@@ -705,32 +739,29 @@ static int __devinit omap2_onenand_probe(struct platform_device *pdev)
}
}
- if ((r = onenand_scan(&c->mtd, 1)) < 0)
- goto err_release_dma;
-
- switch ((c->onenand.version_id >> 4) & 0xf) {
- case 0:
- c->freq = 40;
- break;
- case 1:
- c->freq = 54;
- break;
- case 2:
- c->freq = 66;
- break;
- case 3:
- c->freq = 83;
- break;
+ if (pdata->regulator_can_sleep) {
+ c->regulator = regulator_get(&pdev->dev, "vonenand");
+ if (IS_ERR(c->regulator)) {
+ dev_err(&pdev->dev, "Failed to get regulator\n");
+ goto err_release_dma;
+ }
+ c->onenand.enable = omap2_onenand_enable;
+ c->onenand.disable = omap2_onenand_disable;
}
+ if ((r = onenand_scan(&c->mtd, 1)) < 0)
+ goto err_release_regulator;
+
#ifdef CONFIG_MTD_PARTITIONS
- if (pdata->parts != NULL)
- r = add_mtd_partitions(&c->mtd, pdata->parts,
- pdata->nr_parts);
+ r = parse_mtd_partitions(&c->mtd, part_probes, &c->parts, 0);
+ if (r > 0)
+ r = add_mtd_partitions(&c->mtd, c->parts, r);
+ else if (pdata->parts != NULL)
+ r = add_mtd_partitions(&c->mtd, pdata->parts, pdata->nr_parts);
else
#endif
r = add_mtd_device(&c->mtd);
- if (r < 0)
+ if (r)
goto err_release_onenand;
platform_set_drvdata(pdev, c);
@@ -739,6 +770,8 @@ static int __devinit omap2_onenand_probe(struct platform_device *pdev)
err_release_onenand:
onenand_release(&c->mtd);
+err_release_regulator:
+ regulator_put(c->regulator);
err_release_dma:
if (c->dma_channel != -1)
omap_free_dma(c->dma_channel);
@@ -754,6 +787,7 @@ err_release_mem_region:
err_free_cs:
gpmc_cs_free(c->gpmc_cs);
err_kfree:
+ kfree(c->parts);
kfree(c);
return r;
@@ -763,18 +797,8 @@ static int __devexit omap2_onenand_remove(struct platform_device *pdev)
{
struct omap2_onenand *c = dev_get_drvdata(&pdev->dev);
- BUG_ON(c == NULL);
-
-#ifdef CONFIG_MTD_PARTITIONS
- if (c->parts)
- del_mtd_partitions(&c->mtd);
- else
- del_mtd_device(&c->mtd);
-#else
- del_mtd_device(&c->mtd);
-#endif
-
onenand_release(&c->mtd);
+ regulator_put(c->regulator);
if (c->dma_channel != -1)
omap_free_dma(c->dma_channel);
omap2_onenand_shutdown(pdev);
@@ -786,6 +810,7 @@ static int __devexit omap2_onenand_remove(struct platform_device *pdev)
iounmap(c->onenand.base);
release_mem_region(c->phys_base, ONENAND_IO_SIZE);
gpmc_cs_free(c->gpmc_cs);
+ kfree(c->parts);
kfree(c);
return 0;
@@ -815,7 +840,7 @@ static void __exit omap2_onenand_exit(void)
module_init(omap2_onenand_init);
module_exit(omap2_onenand_exit);
-MODULE_ALIAS(DRIVER_NAME);
+MODULE_ALIAS("platform:" DRIVER_NAME);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jarkko Lavinen <jarkko.lavinen@nokia.com>");
MODULE_DESCRIPTION("Glue layer for OneNAND flash on OMAP2 / OMAP3");