From 9467114ef43c971f0ae8aee3729d412125a2f432 Mon Sep 17 00:00:00 2001 From: Sascha Hauer Date: Mon, 5 Oct 2009 12:14:21 +0200 Subject: [PATCH] mxc_nand: Add NFC V2 support The v2 version of this controller is used on i.MX35/25 SoCs. Signed-off-by: Sascha Hauer --- drivers/mtd/nand/mxc_nand.c | 81 +++++++++++++++++++++++++++++++------ 1 file changed, 68 insertions(+), 13 deletions(-) diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c index 09b9aab6823d..4a696820d6d4 100644 --- a/drivers/mtd/nand/mxc_nand.c +++ b/drivers/mtd/nand/mxc_nand.c @@ -33,9 +33,13 @@ #include #include +#include #define DRIVER_NAME "mxc_nand" +#define nfc_is_v21() (cpu_is_mx25() || cpu_is_mx35()) +#define nfc_is_v1() (cpu_is_mx31() || cpu_is_mx27()) + /* Addresses for NFC registers */ #define NFC_BUF_SIZE 0xE00 #define NFC_BUF_ADDR 0xE04 @@ -46,8 +50,10 @@ #define NFC_RSLTMAIN_AREA 0xE0E #define NFC_RSLTSPARE_AREA 0xE10 #define NFC_WRPROT 0xE12 -#define NFC_UNLOCKSTART_BLKADDR 0xE14 -#define NFC_UNLOCKEND_BLKADDR 0xE16 +#define NFC_V1_UNLOCKSTART_BLKADDR 0xe14 +#define NFC_V1_UNLOCKEND_BLKADDR 0xe16 +#define NFC_V21_UNLOCKSTART_BLKADDR 0xe20 +#define NFC_V21_UNLOCKEND_BLKADDR 0xe22 #define NFC_NF_WRPRST 0xE18 #define NFC_CONFIG1 0xE1A #define NFC_CONFIG2 0xE1C @@ -116,19 +122,47 @@ struct mxc_nand_host { #define TROP_US_DELAY 2000 /* OOB placement block for use with hardware ecc generation */ -static struct nand_ecclayout nand_hw_eccoob_smallpage = { +static struct nand_ecclayout nandv1_hw_eccoob_smallpage = { .eccbytes = 5, .eccpos = {6, 7, 8, 9, 10}, .oobfree = {{0, 5}, {12, 4}, } }; -static struct nand_ecclayout nand_hw_eccoob_largepage = { +static struct nand_ecclayout nandv1_hw_eccoob_largepage = { .eccbytes = 20, .eccpos = {6, 7, 8, 9, 10, 22, 23, 24, 25, 26, 38, 39, 40, 41, 42, 54, 55, 56, 57, 58}, .oobfree = {{2, 4}, {11, 10}, {27, 10}, {43, 10}, {59, 5}, } }; +/* OOB description for 512 byte pages with 16 byte OOB */ +static struct nand_ecclayout nandv2_hw_eccoob_smallpage = { + .eccbytes = 1 * 9, + .eccpos = { + 7, 8, 9, 10, 11, 12, 13, 14, 15 + }, + .oobfree = { + {.offset = 0, .length = 5} + } +}; + +/* OOB description for 2048 byte pages with 64 byte OOB */ +static struct nand_ecclayout nandv2_hw_eccoob_largepage = { + .eccbytes = 4 * 9, + .eccpos = { + 7, 8, 9, 10, 11, 12, 13, 14, 15, + 23, 24, 25, 26, 27, 28, 29, 30, 31, + 39, 40, 41, 42, 43, 44, 45, 46, 47, + 55, 56, 57, 58, 59, 60, 61, 62, 63 + }, + .oobfree = { + {.offset = 2, .length = 4}, + {.offset = 16, .length = 7}, + {.offset = 32, .length = 7}, + {.offset = 48, .length = 7} + } +}; + #ifdef CONFIG_MTD_PARTITIONS static const char *part_probes[] = { "RedBoot", "cmdlinepart", NULL }; #endif @@ -219,7 +253,7 @@ static void send_page(struct mtd_info *mtd, unsigned int ops) struct mxc_nand_host *host = nand_chip->priv; int bufs, i; - if (mtd->writesize > 512) + if (nfc_is_v1() && mtd->writesize > 512) bufs = 4; else bufs = 1; @@ -613,6 +647,7 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command, send_cmd(host, command, true); mxc_do_addr_cycle(mtd, column, page_addr); send_read_id(host); + host->buf_start = column; break; case NAND_CMD_ERASE1: @@ -633,6 +668,7 @@ static int __init mxcnd_probe(struct platform_device *pdev) struct resource *res; uint16_t tmp; int err = 0, nr_parts = 0; + struct nand_ecclayout *oob_smallpage, *oob_largepage; /* Allocate memory for MTD device structure and private data */ host = kzalloc(sizeof(struct mxc_nand_host) + NAND_MAX_PAGESIZE + @@ -641,7 +677,6 @@ static int __init mxcnd_probe(struct platform_device *pdev) return -ENOMEM; host->data_buf = (uint8_t *)(host + 1); - host->spare_len = 16; host->dev = &pdev->dev; /* structures must be linked */ @@ -686,10 +721,23 @@ static int __init mxcnd_probe(struct platform_device *pdev) goto eres; } - host->regs = host->base; host->main_area0 = host->base; host->main_area1 = host->base + 0x200; - host->spare0 = host->base + 0x800; + + if (nfc_is_v21()) { + host->regs = host->base + 0x1000; + host->spare0 = host->base + 0x1000; + host->spare_len = 64; + oob_smallpage = &nandv2_hw_eccoob_smallpage; + oob_largepage = &nandv2_hw_eccoob_largepage; + } else if (nfc_is_v1()) { + host->regs = host->base; + host->spare0 = host->base + 0x800; + host->spare_len = 16; + oob_smallpage = &nandv1_hw_eccoob_smallpage; + oob_largepage = &nandv1_hw_eccoob_largepage; + } else + BUG(); tmp = readw(host->regs + NFC_CONFIG1); tmp |= NFC_INT_MSK; @@ -711,15 +759,22 @@ static int __init mxcnd_probe(struct platform_device *pdev) writew(0x2, host->regs + NFC_CONFIG); /* Blocks to be unlocked */ - writew(0x0, host->regs + NFC_UNLOCKSTART_BLKADDR); - writew(0x4000, host->regs + NFC_UNLOCKEND_BLKADDR); + if (nfc_is_v21()) { + writew(0x0, host->regs + NFC_V21_UNLOCKSTART_BLKADDR); + writew(0xffff, host->regs + NFC_V21_UNLOCKEND_BLKADDR); + this->ecc.bytes = 9; + } else if (nfc_is_v1()) { + writew(0x0, host->regs + NFC_V1_UNLOCKSTART_BLKADDR); + writew(0x4000, host->regs + NFC_V1_UNLOCKEND_BLKADDR); + this->ecc.bytes = 3; + } else + BUG(); /* Unlock Block Command for given address range */ writew(0x4, host->regs + NFC_WRPROT); this->ecc.size = 512; - this->ecc.bytes = 3; - this->ecc.layout = &nand_hw_eccoob_smallpage; + this->ecc.layout = oob_smallpage; if (pdata->hw_ecc) { this->ecc.calculate = mxc_nand_calculate_ecc; @@ -747,7 +802,7 @@ static int __init mxcnd_probe(struct platform_device *pdev) } if (mtd->writesize == 2048) - this->ecc.layout = &nand_hw_eccoob_largepage; + this->ecc.layout = oob_largepage; /* second phase scan */ if (nand_scan_tail(mtd)) { -- 2.20.1