diff options
Diffstat (limited to 'drivers/mtd/onenand/samsung.c')
| -rw-r--r-- | drivers/mtd/onenand/samsung.c | 145 |
1 files changed, 134 insertions, 11 deletions
diff --git a/drivers/mtd/onenand/samsung.c b/drivers/mtd/onenand/samsung.c index 3306b5b..9532cc9 100644 --- a/drivers/mtd/onenand/samsung.c +++ b/drivers/mtd/onenand/samsung.c @@ -23,12 +23,16 @@ #include <linux/mtd/partitions.h> #include <linux/dma-mapping.h> #include <linux/interrupt.h> +#include <linux/clk.h> #include <asm/mach/flash.h> #include <plat/regs-onenand.h> #include <linux/io.h> +#include <asm/setup.h> +#include <linux/string.h> + enum soc_type { TYPE_S3C6400, TYPE_S3C6410, @@ -36,6 +40,45 @@ enum soc_type { TYPE_S5PC110, }; +struct mtd_partition s3c_partition_info[] = { + { + .name = "misc", + .offset = (768*SZ_1K), /* for bootloader */ + .size = (256*SZ_1K), + .mask_flags = MTD_CAP_NANDFLASH, + }, + { + .name = "recovery", + .offset = MTDPART_OFS_APPEND, + .size = (5*SZ_1M), + }, + { + .name = "kernel", + .offset = MTDPART_OFS_APPEND, + .size = (5*SZ_1M), + }, + { + .name = "ramdisk", + .offset = MTDPART_OFS_APPEND, + .size = (3*SZ_1M), + }, + { + .name = "system", + .offset = MTDPART_OFS_APPEND, + .size = (90*SZ_1M), + }, + { + .name = "cache", + .offset = MTDPART_OFS_APPEND, + .size = (80*SZ_1M), + }, + { + .name = "userdata", + .offset = MTDPART_OFS_APPEND, + .size = MTDPART_SIZ_FULL, + } +}; + #define ONENAND_ERASE_STATUS 0x00 #define ONENAND_MULTI_ERASE_SET 0x01 #define ONENAND_ERASE_START 0x03 @@ -193,6 +236,56 @@ static void s3c_dump_reg(void) } #endif +struct slsi_ptbl_entry { + char name[16]; + __u32 offset; + __u32 size; + __u32 flags; +}; + +struct mtd_partition *partitions; +int num_partitions; + +#define MAX_PARTITIONS 12 +#define ATAG_SLSI_PARTITION 0x28247574 +struct mtd_partition slsi_nand_partitions[MAX_PARTITIONS]; +char slsi_nand_names[MAX_PARTITIONS * 16]; + +static int __init parse_tag_partition(const struct tag *tag) +{ + struct mtd_partition *ptn = slsi_nand_partitions; + char *name = slsi_nand_names; + struct slsi_ptbl_entry *entry = (void *) &tag->u; + unsigned count, n; + + count = (tag->hdr.size - 2) / + (sizeof(struct slsi_ptbl_entry) / sizeof(__u32)); + + if (count > MAX_PARTITIONS) + count = MAX_PARTITIONS; + + for (n = 0; n < count; n++) { + memcpy(name, entry->name, 15); + name[15] = 0; + ptn->name = name; + ptn->offset = entry->offset; + ptn->size = entry->size; + + printk(KERN_INFO "Partition (from atag) %15s -- Offset:0x%08x Size:0x%08x\n", + entry->name, entry->offset, entry->size); + + name += 16; + entry++; + ptn++; + } + + num_partitions = count; + partitions = slsi_nand_partitions; + + return 0; +} +__tagtable(ATAG_SLSI_PARTITION, parse_tag_partition); + static unsigned int s3c64xx_cmd_map(unsigned type, unsigned val) { return (type << S3C64XX_CMD_MAP_SHIFT) | val; @@ -916,6 +1009,17 @@ static int s3c_onenand_probe(struct platform_device *pdev) err = -EFAULT; goto ioremap_failed; } + + this->clk = clk_get(&pdev->dev, "onenand"); + + if (IS_ERR(this->clk)) { + dev_err(&pdev->dev, "cannot get clock\n"); + err = PTR_ERR(this->clk); + goto clk_failed; + } + + clk_enable(this->clk); + /* Set onenand_chip also */ this->base = onenand->base; @@ -1017,6 +1121,27 @@ static int s3c_onenand_probe(struct platform_device *pdev) if (s3c_read_reg(MEM_CFG_OFFSET) & ONENAND_SYS_CFG1_SYNC_READ) dev_info(&onenand->pdev->dev, "OneNAND Sync. Burst Read enabled\n"); +#ifdef CONFIG_MTD_CMDLINE_PARTS + err = parse_mtd_partitions(mtd, part_probes, &onenand->parts, 0); + if (err > 0) + mtd_device_register(mtd, onenand->parts, err); + else if (err <= 0 && pdata && pdata->parts) + mtd_device_register(mtd, pdata->parts, pdata->nr_parts); + else +#endif + if (num_partitions <= 0) { + /* default partition table */ + num_partitions = ARRAY_SIZE(s3c_partition_info); /* pdata->nr_parts */ + partitions = s3c_partition_info; /* pdata->parts */ + } + + if (partitions && num_partitions > 0) + err = mtd_device_register(mtd, partitions, num_partitions); + else + err = mtd_device_register(mtd, NULL, 0); + + +/* err = parse_mtd_partitions(mtd, part_probes, &onenand->parts, 0); if (err > 0) mtd_device_register(mtd, onenand->parts, err); @@ -1024,9 +1149,11 @@ static int s3c_onenand_probe(struct platform_device *pdev) mtd_device_register(mtd, pdata->parts, pdata->nr_parts); else err = mtd_device_register(mtd, NULL, 0); +*/ platform_set_drvdata(pdev, mtd); + clk_disable(this->clk); return 0; scan_failed: @@ -1049,6 +1176,9 @@ ahb_ioremap_failed: dma_resource_failed: ahb_resource_failed: iounmap(onenand->base); + clk_disable(this->clk); + clk_put(this->clk); +clk_failed: ioremap_failed: if (onenand->base_res) release_mem_region(onenand->base_res->start, @@ -1063,6 +1193,7 @@ onenand_fail: static int __devexit s3c_onenand_remove(struct platform_device *pdev) { struct mtd_info *mtd = platform_get_drvdata(pdev); + struct onenand_chip *this = mtd->priv; onenand_release(mtd); if (onenand->ahb_addr) @@ -1083,33 +1214,25 @@ static int __devexit s3c_onenand_remove(struct platform_device *pdev) platform_set_drvdata(pdev, NULL); kfree(onenand->oob_buf); kfree(onenand->page_buf); + clk_put(this->clk); kfree(onenand); kfree(mtd); return 0; } -static int s3c_pm_ops_suspend(struct device *dev) -{ - struct platform_device *pdev = to_platform_device(dev); - struct mtd_info *mtd = platform_get_drvdata(pdev); - struct onenand_chip *this = mtd->priv; - - this->wait(mtd, FL_PM_SUSPENDED); - return 0; -} - static int s3c_pm_ops_resume(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); struct mtd_info *mtd = platform_get_drvdata(pdev); struct onenand_chip *this = mtd->priv; + clk_enable(this->clk); this->unlock_all(mtd); + clk_disable(this->clk); return 0; } static const struct dev_pm_ops s3c_pm_ops = { - .suspend = s3c_pm_ops_suspend, .resume = s3c_pm_ops_resume, }; |