X-Git-Url: https://git.kernelconcepts.de/?a=blobdiff_plain;f=drivers%2Fmtd%2Fnand%2Fatmel_nand.c;h=a345e7b2463a3f80fb806fe12a19fcf2e72bf13e;hb=d6666be6f0c43efb9475d1d35fbef9f8be61b7b1;hp=84c38f3c65b0cc7e12718be9a0e4e884a68e0086;hpb=0ea90b9e79cff66934119e6dd8fa8e9d0f7d005a;p=karo-tx-linux.git diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c index 84c38f3c65b0..a345e7b2463a 100644 --- a/drivers/mtd/nand/atmel_nand.c +++ b/drivers/mtd/nand/atmel_nand.c @@ -92,7 +92,7 @@ static struct nand_ecclayout atmel_oobinfo_small = { struct atmel_nfc { void __iomem *base_cmd_regs; void __iomem *hsmc_regs; - void __iomem *sram_bank0; + void *sram_bank0; dma_addr_t sram_bank0_phys; bool use_nfc_sram; bool write_by_sram; @@ -105,7 +105,7 @@ struct atmel_nfc { struct completion comp_xfer_done; /* Point to the sram bank which include readed data via NFC */ - void __iomem *data_in_sram; + void *data_in_sram; bool will_write_sram; }; static struct atmel_nfc nand_nfc; @@ -127,6 +127,7 @@ struct atmel_nand_host { bool has_pmecc; u8 pmecc_corr_cap; u16 pmecc_sector_size; + bool has_no_lookup_table; u32 pmecc_lookup_table_offset; u32 pmecc_lookup_table_offset_512; u32 pmecc_lookup_table_offset_1024; @@ -256,26 +257,6 @@ static int atmel_nand_set_enable_ready_pins(struct mtd_info *mtd) return res; } -static void memcpy32_fromio(void *trg, const void __iomem *src, size_t size) -{ - int i; - u32 *t = trg; - const __iomem u32 *s = src; - - for (i = 0; i < (size >> 2); i++) - *t++ = readl_relaxed(s++); -} - -static void memcpy32_toio(void __iomem *trg, const void *src, int size) -{ - int i; - u32 __iomem *t = trg; - const u32 *s = src; - - for (i = 0; i < (size >> 2); i++) - writel_relaxed(*s++, t++); -} - /* * Minimal-overhead PIO for data access. */ @@ -285,7 +266,7 @@ static void atmel_read_buf8(struct mtd_info *mtd, u8 *buf, int len) struct atmel_nand_host *host = nand_chip->priv; if (host->nfc && host->nfc->use_nfc_sram && host->nfc->data_in_sram) { - memcpy32_fromio(buf, host->nfc->data_in_sram, len); + memcpy(buf, host->nfc->data_in_sram, len); host->nfc->data_in_sram += len; } else { __raw_readsb(nand_chip->IO_ADDR_R, buf, len); @@ -298,7 +279,7 @@ static void atmel_read_buf16(struct mtd_info *mtd, u8 *buf, int len) struct atmel_nand_host *host = nand_chip->priv; if (host->nfc && host->nfc->use_nfc_sram && host->nfc->data_in_sram) { - memcpy32_fromio(buf, host->nfc->data_in_sram, len); + memcpy(buf, host->nfc->data_in_sram, len); host->nfc->data_in_sram += len; } else { __raw_readsw(nand_chip->IO_ADDR_R, buf, len / 2); @@ -1112,12 +1093,66 @@ static int pmecc_choose_ecc(struct atmel_nand_host *host, return 0; } +static inline int deg(unsigned int poly) +{ + /* polynomial degree is the most-significant bit index */ + return fls(poly) - 1; +} + +static int build_gf_tables(int mm, unsigned int poly, + int16_t *index_of, int16_t *alpha_to) +{ + unsigned int i, x = 1; + const unsigned int k = 1 << deg(poly); + unsigned int nn = (1 << mm) - 1; + + /* primitive polynomial must be of degree m */ + if (k != (1u << mm)) + return -EINVAL; + + for (i = 0; i < nn; i++) { + alpha_to[i] = x; + index_of[x] = i; + if (i && (x == 1)) + /* polynomial is not primitive (a^i=1 with 0mtd; struct nand_chip *nand_chip = &host->nand_chip; struct resource *regs, *regs_pmerr, *regs_rom; + uint16_t *galois_table; int cap, sector_size, err_no; err_no = pmecc_choose_ecc(host, &cap, §or_size); @@ -1163,8 +1198,24 @@ static int atmel_pmecc_nand_init_params(struct platform_device *pdev, regs_rom = platform_get_resource(pdev, IORESOURCE_MEM, 3); host->pmecc_rom_base = devm_ioremap_resource(&pdev->dev, regs_rom); if (IS_ERR(host->pmecc_rom_base)) { - err_no = PTR_ERR(host->pmecc_rom_base); - goto err; + if (!host->has_no_lookup_table) + /* Don't display the information again */ + dev_err(host->dev, "Can not get I/O resource for ROM, will build a lookup table in runtime!\n"); + + host->has_no_lookup_table = true; + } + + if (host->has_no_lookup_table) { + /* Build the look-up table in runtime */ + galois_table = create_lookup_table(host->dev, sector_size); + if (!galois_table) { + dev_err(host->dev, "Failed to build a lookup table in runtime!\n"); + err_no = -EINVAL; + goto err; + } + + host->pmecc_rom_base = (void __iomem *)galois_table; + host->pmecc_lookup_table_offset = 0; } nand_chip->ecc.size = sector_size; @@ -1501,8 +1552,10 @@ static int atmel_of_init_port(struct atmel_nand_host *host, if (of_property_read_u32_array(np, "atmel,pmecc-lookup-table-offset", offset, 2) != 0) { - dev_err(host->dev, "Cannot get PMECC lookup table offset\n"); - return -EINVAL; + dev_err(host->dev, "Cannot get PMECC lookup table offset, will build a lookup table in runtime.\n"); + host->has_no_lookup_table = true; + /* Will build a lookup table and initialize the offset later */ + return 0; } if (!offset[0] && !offset[1]) { dev_err(host->dev, "Invalid PMECC lookup table offset\n"); @@ -1899,7 +1952,7 @@ static int nfc_sram_write_page(struct mtd_info *mtd, struct nand_chip *chip, int cfg, len; int status = 0; struct atmel_nand_host *host = chip->priv; - void __iomem *sram = host->nfc->sram_bank0 + nfc_get_sram_off(host); + void *sram = host->nfc->sram_bank0 + nfc_get_sram_off(host); /* Subpage write is not supported */ if (offset || (data_len < mtd->writesize)) @@ -1910,14 +1963,14 @@ static int nfc_sram_write_page(struct mtd_info *mtd, struct nand_chip *chip, if (use_dma) { if (atmel_nand_dma_op(mtd, (void *)buf, len, 0) != 0) /* Fall back to use cpu copy */ - memcpy32_toio(sram, buf, len); + memcpy(sram, buf, len); } else { - memcpy32_toio(sram, buf, len); + memcpy(sram, buf, len); } cfg = nfc_readl(host->nfc->hsmc_regs, CFG); if (unlikely(raw) && oob_required) { - memcpy32_toio(sram + len, chip->oob_poi, mtd->oobsize); + memcpy(sram + len, chip->oob_poi, mtd->oobsize); len += mtd->oobsize; nfc_writel(host->nfc->hsmc_regs, CFG, cfg | NFC_CFG_WSPARE); } else { @@ -2260,7 +2313,8 @@ static int atmel_nand_nfc_probe(struct platform_device *pdev) nfc_sram = platform_get_resource(pdev, IORESOURCE_MEM, 2); if (nfc_sram) { - nfc->sram_bank0 = devm_ioremap_resource(&pdev->dev, nfc_sram); + nfc->sram_bank0 = (void * __force) + devm_ioremap_resource(&pdev->dev, nfc_sram); if (IS_ERR(nfc->sram_bank0)) { dev_warn(&pdev->dev, "Fail to ioremap the NFC sram with error: %ld. So disable NFC sram.\n", PTR_ERR(nfc->sram_bank0));