diff options
Diffstat (limited to 'drivers/mtd')
-rw-r--r-- | drivers/mtd/nand/omap2.c | 129 | ||||
-rw-r--r-- | drivers/mtd/onenand/omap2.c | 11 |
2 files changed, 112 insertions, 28 deletions
diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c index 5b313862064..5c8978e9024 100644 --- a/drivers/mtd/nand/omap2.c +++ b/drivers/mtd/nand/omap2.c @@ -27,8 +27,7 @@ #include <linux/bch.h> #endif -#include <plat/dma.h> -#include <plat/gpmc.h> +#include <plat-omap/dma-omap.h> #include <linux/platform_data/mtd-nand-omap2.h> #define DRIVER_NAME "omap2-nand" @@ -106,10 +105,18 @@ #define CS_MASK 0x7 #define ENABLE_PREFETCH (0x1 << 7) #define DMA_MPU_MODE_SHIFT 2 +#define ECCSIZE0_SHIFT 12 #define ECCSIZE1_SHIFT 22 #define ECC1RESULTSIZE 0x1 #define ECCCLEAR 0x100 #define ECC1 0x1 +#define PREFETCH_FIFOTHRESHOLD_MAX 0x40 +#define PREFETCH_FIFOTHRESHOLD(val) ((val) << 8) +#define PREFETCH_STATUS_COUNT(val) (val & 0x00003fff) +#define PREFETCH_STATUS_FIFO_CNT(val) ((val >> 24) & 0x7F) +#define STATUS_BUFF_EMPTY 0x00000001 + +#define OMAP24XX_DMA_GPMC 4 /* oob info generated runtime depending on ecc algorithm and layout selected */ static struct nand_ecclayout omap_oobinfo; @@ -269,7 +276,7 @@ static void omap_write_buf8(struct mtd_info *mtd, const u_char *buf, int len) /* wait until buffer is available for write */ do { status = readl(info->reg.gpmc_status) & - GPMC_STATUS_BUFF_EMPTY; + STATUS_BUFF_EMPTY; } while (!status); } } @@ -307,7 +314,7 @@ static void omap_write_buf16(struct mtd_info *mtd, const u_char * buf, int len) /* wait until buffer is available for write */ do { status = readl(info->reg.gpmc_status) & - GPMC_STATUS_BUFF_EMPTY; + STATUS_BUFF_EMPTY; } while (!status); } } @@ -348,7 +355,7 @@ static void omap_read_buf_pref(struct mtd_info *mtd, u_char *buf, int len) } else { do { r_count = readl(info->reg.gpmc_prefetch_status); - r_count = GPMC_PREFETCH_STATUS_FIFO_CNT(r_count); + r_count = PREFETCH_STATUS_FIFO_CNT(r_count); r_count = r_count >> 2; ioread32_rep(info->nand.IO_ADDR_R, p, r_count); p += r_count; @@ -395,7 +402,7 @@ static void omap_write_buf_pref(struct mtd_info *mtd, } else { while (len) { w_count = readl(info->reg.gpmc_prefetch_status); - w_count = GPMC_PREFETCH_STATUS_FIFO_CNT(w_count); + w_count = PREFETCH_STATUS_FIFO_CNT(w_count); w_count = w_count >> 1; for (i = 0; (i < w_count) && len; i++, len -= 2) iowrite16(*p++, info->nand.IO_ADDR_W); @@ -407,7 +414,7 @@ static void omap_write_buf_pref(struct mtd_info *mtd, do { cpu_relax(); val = readl(info->reg.gpmc_prefetch_status); - val = GPMC_PREFETCH_STATUS_COUNT(val); + val = PREFETCH_STATUS_COUNT(val); } while (val && (tim++ < limit)); /* disable and stop the PFPW engine */ @@ -493,7 +500,7 @@ static inline int omap_nand_dma_transfer(struct mtd_info *mtd, void *addr, do { cpu_relax(); val = readl(info->reg.gpmc_prefetch_status); - val = GPMC_PREFETCH_STATUS_COUNT(val); + val = PREFETCH_STATUS_COUNT(val); } while (val && (tim++ < limit)); /* disable and stop the PFPW engine */ @@ -556,7 +563,7 @@ static irqreturn_t omap_nand_irq(int this_irq, void *dev) u32 bytes; bytes = readl(info->reg.gpmc_prefetch_status); - bytes = GPMC_PREFETCH_STATUS_FIFO_CNT(bytes); + bytes = PREFETCH_STATUS_FIFO_CNT(bytes); bytes = bytes & 0xFFFC; /* io in multiple of 4 bytes */ if (info->iomode == OMAP_NAND_IO_WRITE) { /* checks for write io */ if (this_irq == info->gpmc_irq_count) @@ -682,7 +689,7 @@ static void omap_write_buf_irq_pref(struct mtd_info *mtd, limit = (loops_per_jiffy * msecs_to_jiffies(OMAP_NAND_TIMEOUT_MS)); do { val = readl(info->reg.gpmc_prefetch_status); - val = GPMC_PREFETCH_STATUS_COUNT(val); + val = PREFETCH_STATUS_COUNT(val); cpu_relax(); } while (val && (tim++ < limit)); @@ -996,7 +1003,7 @@ static int omap_wait(struct mtd_info *mtd, struct nand_chip *chip) cond_resched(); } - status = gpmc_nand_read(info->gpmc_cs, GPMC_NAND_DATA); + status = readb(info->reg.gpmc_nand_data); return status; } @@ -1029,19 +1036,45 @@ static int omap_dev_ready(struct mtd_info *mtd) static void omap3_enable_hwecc_bch(struct mtd_info *mtd, int mode) { int nerrors; - unsigned int dev_width; + unsigned int dev_width, nsectors; struct omap_nand_info *info = container_of(mtd, struct omap_nand_info, mtd); struct nand_chip *chip = mtd->priv; + u32 val; nerrors = (info->nand.ecc.bytes == 13) ? 8 : 4; dev_width = (chip->options & NAND_BUSWIDTH_16) ? 1 : 0; + nsectors = 1; /* * Program GPMC to perform correction on one 512-byte sector at a time. * Using 4 sectors at a time (i.e. ecc.size = 2048) is also possible and * gives a slight (5%) performance gain (but requires additional code). */ - (void)gpmc_enable_hwecc_bch(info->gpmc_cs, mode, dev_width, 1, nerrors); + + writel(ECC1, info->reg.gpmc_ecc_control); + + /* + * When using BCH, sector size is hardcoded to 512 bytes. + * Here we are using wrapping mode 6 both for reading and writing, with: + * size0 = 0 (no additional protected byte in spare area) + * size1 = 32 (skip 32 nibbles = 16 bytes per sector in spare area) + */ + val = (32 << ECCSIZE1_SHIFT) | (0 << ECCSIZE0_SHIFT); + writel(val, info->reg.gpmc_ecc_size_config); + + /* BCH configuration */ + val = ((1 << 16) | /* enable BCH */ + (((nerrors == 8) ? 1 : 0) << 12) | /* 8 or 4 bits */ + (0x06 << 8) | /* wrap mode = 6 */ + (dev_width << 7) | /* bus width */ + (((nsectors-1) & 0x7) << 4) | /* number of sectors */ + (info->gpmc_cs << 1) | /* ECC CS */ + (0x1)); /* enable ECC */ + + writel(val, info->reg.gpmc_ecc_config); + + /* clear ecc and enable bits */ + writel(ECCCLEAR | ECC1, info->reg.gpmc_ecc_control); } /** @@ -1055,7 +1088,32 @@ static int omap3_calculate_ecc_bch4(struct mtd_info *mtd, const u_char *dat, { struct omap_nand_info *info = container_of(mtd, struct omap_nand_info, mtd); - return gpmc_calculate_ecc_bch4(info->gpmc_cs, dat, ecc_code); + unsigned long nsectors, val1, val2; + int i; + + nsectors = ((readl(info->reg.gpmc_ecc_config) >> 4) & 0x7) + 1; + + for (i = 0; i < nsectors; i++) { + + /* Read hw-computed remainder */ + val1 = readl(info->reg.gpmc_bch_result0[i]); + val2 = readl(info->reg.gpmc_bch_result1[i]); + + /* + * Add constant polynomial to remainder, in order to get an ecc + * sequence of 0xFFs for a buffer filled with 0xFFs; and + * left-justify the resulting polynomial. + */ + *ecc_code++ = 0x28 ^ ((val2 >> 12) & 0xFF); + *ecc_code++ = 0x13 ^ ((val2 >> 4) & 0xFF); + *ecc_code++ = 0xcc ^ (((val2 & 0xF) << 4)|((val1 >> 28) & 0xF)); + *ecc_code++ = 0x39 ^ ((val1 >> 20) & 0xFF); + *ecc_code++ = 0x96 ^ ((val1 >> 12) & 0xFF); + *ecc_code++ = 0xac ^ ((val1 >> 4) & 0xFF); + *ecc_code++ = 0x7f ^ ((val1 & 0xF) << 4); + } + + return 0; } /** @@ -1069,7 +1127,39 @@ static int omap3_calculate_ecc_bch8(struct mtd_info *mtd, const u_char *dat, { struct omap_nand_info *info = container_of(mtd, struct omap_nand_info, mtd); - return gpmc_calculate_ecc_bch8(info->gpmc_cs, dat, ecc_code); + unsigned long nsectors, val1, val2, val3, val4; + int i; + + nsectors = ((readl(info->reg.gpmc_ecc_config) >> 4) & 0x7) + 1; + + for (i = 0; i < nsectors; i++) { + + /* Read hw-computed remainder */ + val1 = readl(info->reg.gpmc_bch_result0[i]); + val2 = readl(info->reg.gpmc_bch_result1[i]); + val3 = readl(info->reg.gpmc_bch_result2[i]); + val4 = readl(info->reg.gpmc_bch_result3[i]); + + /* + * Add constant polynomial to remainder, in order to get an ecc + * sequence of 0xFFs for a buffer filled with 0xFFs. + */ + *ecc_code++ = 0xef ^ (val4 & 0xFF); + *ecc_code++ = 0x51 ^ ((val3 >> 24) & 0xFF); + *ecc_code++ = 0x2e ^ ((val3 >> 16) & 0xFF); + *ecc_code++ = 0x09 ^ ((val3 >> 8) & 0xFF); + *ecc_code++ = 0xed ^ (val3 & 0xFF); + *ecc_code++ = 0x93 ^ ((val2 >> 24) & 0xFF); + *ecc_code++ = 0x9a ^ ((val2 >> 16) & 0xFF); + *ecc_code++ = 0xc2 ^ ((val2 >> 8) & 0xFF); + *ecc_code++ = 0x97 ^ (val2 & 0xFF); + *ecc_code++ = 0x79 ^ ((val1 >> 24) & 0xFF); + *ecc_code++ = 0xe5 ^ ((val1 >> 16) & 0xFF); + *ecc_code++ = 0x24 ^ ((val1 >> 8) & 0xFF); + *ecc_code++ = 0xb5 ^ (val1 & 0xFF); + } + + return 0; } /** @@ -1125,7 +1215,7 @@ static void omap3_free_bch(struct mtd_info *mtd) */ static int omap3_init_bch(struct mtd_info *mtd, int ecc_opt) { - int ret, max_errors; + int max_errors; struct omap_nand_info *info = container_of(mtd, struct omap_nand_info, mtd); #ifdef CONFIG_MTD_NAND_OMAP_BCH8 @@ -1142,11 +1232,6 @@ static int omap3_init_bch(struct mtd_info *mtd, int ecc_opt) goto fail; } - /* initialize GPMC BCH engine */ - ret = gpmc_init_hwecc_bch(info->gpmc_cs, 1, max_errors); - if (ret) - goto fail; - /* software bch library is only used to detect and locate errors */ info->bch = init_bch(13, max_errors, 0x201b /* hw polynomial */); if (!info->bch) @@ -1513,7 +1598,7 @@ static int omap_nand_remove(struct platform_device *pdev) /* Release NAND device, its internal structures and partitions */ nand_release(&info->mtd); iounmap(info->nand.IO_ADDR_R); - release_mem_region(info->phys_base, NAND_IO_SIZE); + release_mem_region(info->phys_base, info->mem_size); kfree(info); return 0; } diff --git a/drivers/mtd/onenand/omap2.c b/drivers/mtd/onenand/omap2.c index 1961be98517..53069aef1f4 100644 --- a/drivers/mtd/onenand/omap2.c +++ b/drivers/mtd/onenand/omap2.c @@ -38,12 +38,10 @@ #include <linux/regulator/consumer.h> #include <asm/mach/flash.h> -#include <plat/gpmc.h> #include <linux/platform_data/mtd-onenand-omap2.h> #include <asm/gpio.h> -#include <plat/dma.h> -#include <plat/cpu.h> +#include <plat-omap/dma-omap.h> #define DRIVER_NAME "omap2-onenand" @@ -63,6 +61,7 @@ struct omap2_onenand { int freq; int (*setup)(void __iomem *base, int *freq_ptr); struct regulator *regulator; + u8 flags; }; static void omap2_onenand_dma_cb(int lch, u16 ch_status, void *data) @@ -155,7 +154,7 @@ static int omap2_onenand_wait(struct mtd_info *mtd, int state) if (!(syscfg & ONENAND_SYS_CFG1_IOBE)) { syscfg |= ONENAND_SYS_CFG1_IOBE; write_reg(c, syscfg, ONENAND_REG_SYS_CFG1); - if (cpu_is_omap34xx()) + if (c->flags & ONENAND_IN_OMAP34XX) /* Add a delay to let GPIO settle */ syscfg = read_reg(c, ONENAND_REG_SYS_CFG1); } @@ -639,6 +638,7 @@ static int __devinit omap2_onenand_probe(struct platform_device *pdev) init_completion(&c->irq_done); init_completion(&c->dma_done); + c->flags = pdata->flags; c->gpmc_cs = pdata->cs; c->gpio_irq = pdata->gpio_irq; c->dma_channel = pdata->dma_channel; @@ -729,7 +729,7 @@ static int __devinit omap2_onenand_probe(struct platform_device *pdev) this = &c->onenand; if (c->dma_channel >= 0) { this->wait = omap2_onenand_wait; - if (cpu_is_omap34xx()) { + if (c->flags & ONENAND_IN_OMAP34XX) { this->read_bufferram = omap3_onenand_read_bufferram; this->write_bufferram = omap3_onenand_write_bufferram; } else { @@ -803,7 +803,6 @@ static int __devexit omap2_onenand_remove(struct platform_device *pdev) } iounmap(c->onenand.base); release_mem_region(c->phys_base, c->mem_size); - gpmc_cs_free(c->gpmc_cs); kfree(c); return 0; |