diff options
Diffstat (limited to 'drivers/mtd/nand')
| -rw-r--r-- | drivers/mtd/nand/Kconfig | 15 | ||||
| -rw-r--r-- | drivers/mtd/nand/Makefile | 1 | ||||
| -rw-r--r-- | drivers/mtd/nand/atmel_nand.c | 166 | ||||
| -rw-r--r-- | drivers/mtd/nand/davinci_nand.c | 3 | ||||
| -rw-r--r-- | drivers/mtd/nand/mpc5121_nfc.c | 5 | ||||
| -rw-r--r-- | drivers/mtd/nand/mxc_nand.c | 31 | ||||
| -rw-r--r-- | drivers/mtd/nand/nand_base.c | 42 | ||||
| -rw-r--r-- | drivers/mtd/nand/nand_bbt.c | 8 | ||||
| -rw-r--r-- | drivers/mtd/nand/nand_bch.c | 243 | ||||
| -rw-r--r-- | drivers/mtd/nand/nandsim.c | 43 | ||||
| -rw-r--r-- | drivers/mtd/nand/omap2.c | 16 | ||||
| -rw-r--r-- | drivers/mtd/nand/pxa3xx_nand.c | 977 |
12 files changed, 1005 insertions, 545 deletions
diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig index 4f6c06f..a92054e 100644 --- a/drivers/mtd/nand/Kconfig +++ b/drivers/mtd/nand/Kconfig @@ -31,6 +31,21 @@ config MTD_NAND_VERIFY_WRITE device thinks the write was successful, a bit could have been flipped accidentally due to device wear or something else. +config MTD_NAND_BCH + tristate + select BCH + depends on MTD_NAND_ECC_BCH + default MTD_NAND + +config MTD_NAND_ECC_BCH + bool "Support software BCH ECC" + default n + help + This enables support for software BCH error correction. Binary BCH + codes are more powerful and cpu intensive than traditional Hamming + ECC codes. They are used with NAND devices requiring more than 1 bit + of error correction. + config MTD_SM_COMMON tristate default n diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile index 8ad6fae..5745d83 100644 --- a/drivers/mtd/nand/Makefile +++ b/drivers/mtd/nand/Makefile @@ -4,6 +4,7 @@ obj-$(CONFIG_MTD_NAND) += nand.o obj-$(CONFIG_MTD_NAND_ECC) += nand_ecc.o +obj-$(CONFIG_MTD_NAND_BCH) += nand_bch.o obj-$(CONFIG_MTD_NAND_IDS) += nand_ids.o obj-$(CONFIG_MTD_SM_COMMON) += sm_common.o diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c index ccce0f0..6fae04b 100644 --- a/drivers/mtd/nand/atmel_nand.c +++ b/drivers/mtd/nand/atmel_nand.c @@ -48,6 +48,9 @@ #define no_ecc 0 #endif +static int use_dma = 1; +module_param(use_dma, int, 0); + static int on_flash_bbt = 0; module_param(on_flash_bbt, int, 0); @@ -89,11 +92,20 @@ struct atmel_nand_host { struct nand_chip nand_chip; struct mtd_info mtd; void __iomem *io_base; + dma_addr_t io_phys; struct atmel_nand_data *board; struct device *dev; void __iomem *ecc; + + struct completion comp; + struct dma_chan *dma_chan; }; +static int cpu_has_dma(void) +{ + return cpu_is_at91sam9rl() || cpu_is_at91sam9g45(); +} + /* * Enable NAND. */ @@ -150,7 +162,7 @@ static int atmel_nand_device_ready(struct mtd_info *mtd) /* * Minimal-overhead PIO for data access. */ -static void atmel_read_buf(struct mtd_info *mtd, u8 *buf, int len) +static void atmel_read_buf8(struct mtd_info *mtd, u8 *buf, int len) { struct nand_chip *nand_chip = mtd->priv; @@ -164,7 +176,7 @@ static void atmel_read_buf16(struct mtd_info *mtd, u8 *buf, int len) __raw_readsw(nand_chip->IO_ADDR_R, buf, len / 2); } -static void atmel_write_buf(struct mtd_info *mtd, const u8 *buf, int len) +static void atmel_write_buf8(struct mtd_info *mtd, const u8 *buf, int len) { struct nand_chip *nand_chip = mtd->priv; @@ -178,6 +190,121 @@ static void atmel_write_buf16(struct mtd_info *mtd, const u8 *buf, int len) __raw_writesw(nand_chip->IO_ADDR_W, buf, len / 2); } +static void dma_complete_func(void *completion) +{ + complete(completion); +} + +static int atmel_nand_dma_op(struct mtd_info *mtd, void *buf, int len, + int is_read) +{ + struct dma_device *dma_dev; + enum dma_ctrl_flags flags; + dma_addr_t dma_src_addr, dma_dst_addr, phys_addr; + struct dma_async_tx_descriptor *tx = NULL; + dma_cookie_t cookie; + struct nand_chip *chip = mtd->priv; + struct atmel_nand_host *host = chip->priv; + void *p = buf; + int err = -EIO; + enum dma_data_direction dir = is_read ? DMA_FROM_DEVICE : DMA_TO_DEVICE; + + if (buf >= high_memory) { + struct page *pg; + + if (((size_t)buf & PAGE_MASK) != + ((size_t)(buf + len - 1) & PAGE_MASK)) { + dev_warn(host->dev, "Buffer not fit in one page\n"); + goto err_buf; + } + + pg = vmalloc_to_page(buf); + if (pg == 0) { + dev_err(host->dev, "Failed to vmalloc_to_page\n"); + goto err_buf; + } + p = page_address(pg) + ((size_t)buf & ~PAGE_MASK); + } + + dma_dev = host->dma_chan->device; + + flags = DMA_CTRL_ACK | DMA_PREP_INTERRUPT | DMA_COMPL_SKIP_SRC_UNMAP | + DMA_COMPL_SKIP_DEST_UNMAP; + + phys_addr = dma_map_single(dma_dev->dev, p, len, dir); + if (dma_mapping_error(dma_dev->dev, phys_addr)) { + dev_err(host->dev, "Failed to dma_map_single\n"); + goto err_buf; + } + + if (is_read) { + dma_src_addr = host->io_phys; + dma_dst_addr = phys_addr; + } else { + dma_src_addr = phys_addr; + dma_dst_addr = host->io_phys; + } + + tx = dma_dev->device_prep_dma_memcpy(host->dma_chan, dma_dst_addr, + dma_src_addr, len, flags); + if (!tx) { + dev_err(host->dev, "Failed to prepare DMA memcpy\n"); + goto err_dma; + } + + init_completion(&host->comp); + tx->callback = dma_complete_func; + tx->callback_param = &host->comp; + + cookie = tx->tx_submit(tx); + if (dma_submit_error(cookie)) { + dev_err(host->dev, "Failed to do DMA tx_submit\n"); + goto err_dma; + } + + dma_async_issue_pending(host->dma_chan); + wait_for_completion(&host->comp); + + err = 0; + +err_dma: + dma_unmap_single(dma_dev->dev, phys_addr, len, dir); +err_buf: + if (err != 0) + dev_warn(host->dev, "Fall back to CPU I/O\n"); + return err; +} + +static void atmel_read_buf(struct mtd_info *mtd, u8 *buf, int len) +{ + struct nand_chip *chip = mtd->priv; + struct atmel_nand_host *host = chip->priv; + + if (use_dma && len >= mtd->oobsize) + if (atmel_nand_dma_op(mtd, buf, len, 1) == 0) + return; + + if (host->board->bus_width_16) + atmel_read_buf16(mtd, buf, len); + else + atmel_read_buf8(mtd, buf, len); +} + +static void atmel_write_buf(struct mtd_info *mtd, const u8 *buf, int len) +{ + struct nand_chip *chip = mtd->priv; + struct atmel_nand_host *host = chip->priv; + + if (use_dma && len >= mtd->oobsize) + if (atmel_nand_dma_op(mtd, (void *)buf, len, 0) == 0) + return; + + if (host->board->bus_width_16) + atmel_write_buf16(mtd, buf, len); + else + atmel_write_buf8(mtd, buf, len); +} + /* * Calculate HW ECC * @@ -398,6 +525,8 @@ static int __init atmel_nand_probe(struct platform_device *pdev) return -ENOMEM; } + host->io_phys = (dma_addr_t)mem->start; + host->io_base = ioremap(mem->start, mem->end - mem->start + 1); if (host->io_base == NULL) { printk(KERN_ERR "atmel_nand: ioremap failed\n"); @@ -448,14 +577,11 @@ static int __init atmel_nand_probe(struct platform_device *pdev) nand_chip->chip_delay = 20; /* 20us command delay time */ - if (host->board->bus_width_16) { /* 16-bit bus width */ + if (host->board->bus_width_16) /* 16-bit bus width */ nand_chip->options |= NAND_BUSWIDTH_16; - nand_chip->read_buf = atmel_read_buf16; - nand_chip->write_buf = atmel_write_buf16; - } else { - nand_chip->read_buf = atmel_read_buf; - nand_chip->write_buf = atmel_write_buf; - } + + nand_chip->read_buf = atmel_read_buf; + nand_chip->write_buf = atmel_write_buf; platform_set_drvdata(pdev, host); atmel_nand_enable(host); @@ -473,6 +599,22 @@ static int __init atmel_nand_probe(struct platform_device *pdev) nand_chip->options |= NAND_USE_FLASH_BBT; } + if (cpu_has_dma() && use_dma) { + dma_cap_mask_t mask; + + dma_cap_zero(mask); + dma_cap_set(DMA_MEMCPY, mask); + host->dma_chan = dma_request_channel(mask, 0, NULL); + if (!host->dma_chan) { + dev_err(host->dev, "Failed to request DMA channel\n"); + use_dma = 0; + } + } + if (use_dma) + dev_info(host->dev, "Using DMA for NAND access.\n"); + else + dev_info(host->dev, "No DMA support for NAND access.\n"); + /* first scan to find the device and get the page size */ if (nand_scan_ident(mtd, 1, NULL)) { res = -ENXIO; @@ -555,6 +697,8 @@ err_scan_ident: err_no_card: atmel_nand_disable(host); platform_set_drvdata(pdev, NULL); + if (host->dma_chan) + dma_release_channel(host->dma_chan); if (host->ecc) iounmap(host->ecc); err_ecc_ioremap: @@ -578,6 +722,10 @@ static int __exit atmel_nand_remove(struct platform_device *pdev) if (host->ecc) iounmap(host->ecc); + + if (host->dma_chan) + dma_release_channel(host->dma_chan); + iounmap(host->io_base); kfree(host); diff --git a/drivers/mtd/nand/davinci_nand.c b/drivers/mtd/nand/davinci_nand.c index a90fde3..aff3468 100644 --- a/drivers/mtd/nand/davinci_nand.c +++ b/drivers/mtd/nand/davinci_nand.c @@ -37,9 +37,6 @@ #include <mach/nand.h> #include <mach/aemif.h> -#include <asm/mach-types.h> - - /* * This is a device driver for the NAND flash controller found on the * various DaVinci family chips. It handles up to four SoC chipselects, diff --git a/drivers/mtd/nand/mpc5121_nfc.c b/drivers/mtd/nand/mpc5121_nfc.c index c2f9543..0b81b5b 100644 --- a/drivers/mtd/nand/mpc5121_nfc.c +++ b/drivers/mtd/nand/mpc5121_nfc.c @@ -29,6 +29,7 @@ #include <linux/clk.h> #include <linux/gfp.h> #include <linux/delay.h> +#include <linux/err.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/io.h> @@ -757,9 +758,9 @@ static int __devinit mpc5121_nfc_probe(struct platform_device *op) /* Enable NFC clock */ prv->clk = clk_get(dev, "nfc_clk"); - if (!prv->clk) { + if (IS_ERR(prv->clk)) { dev_err(dev, "Unable to acquire NFC clock!\n"); - retval = -ENODEV; + retval = PTR_ERR(prv->clk); goto error; } diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c index 5ae1d9e..42a95fb 100644 --- a/drivers/mtd/nand/mxc_nand.c +++ b/drivers/mtd/nand/mxc_nand.c @@ -211,6 +211,31 @@ static struct nand_ecclayout nandv2_hw_eccoob_largepage = { } }; +/* OOB description for 4096 byte pages with 128 byte OOB */ +static struct nand_ecclayout nandv2_hw_eccoob_4k = { + .eccbytes = 8 * 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, + 71, 72, 73, 74, 75, 76, 77, 78, 79, + 87, 88, 89, 90, 91, 92, 93, 94, 95, + 103, 104, 105, 106, 107, 108, 109, 110, 111, + 119, 120, 121, 122, 123, 124, 125, 126, 127, + }, + .oobfree = { + {.offset = 2, .length = 4}, + {.offset = 16, .length = 7}, + {.offset = 32, .length = 7}, + {.offset = 48, .length = 7}, + {.offset = 64, .length = 7}, + {.offset = 80, .length = 7}, + {.offset = 96, .length = 7}, + {.offset = 112, .length = 7}, + } +}; + #ifdef CONFIG_MTD_PARTITIONS static const char *part_probes[] = { "RedBoot", "cmdlinepart", NULL }; #endif @@ -641,9 +666,9 @@ static void mxc_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len) n = min(n, len); - memcpy(buf, host->data_buf + col, len); + memcpy(buf, host->data_buf + col, n); - host->buf_start += len; + host->buf_start += n; } /* Used by the upper layer to verify the data in NAND Flash @@ -1185,6 +1210,8 @@ static int __init mxcnd_probe(struct platform_device *pdev) if (mtd->writesize == 2048) this->ecc.layout = oob_largepage; + if (nfc_is_v21() && mtd->writesize == 4096) + this->ecc.layout = &nandv2_hw_eccoob_4k; /* second phase scan */ if (nand_scan_tail(mtd)) { diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index a9c6ce7..85cfc06 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -42,6 +42,7 @@ #include <linux/mtd/mtd.h> #include <linux/mtd/nand.h> #include <linux/mtd/nand_ecc.h> +#include <linux/mtd/nand_bch.h> #include <linux/interrupt.h> #include <linux/bitops.h> #include <linux/leds.h> @@ -2377,7 +2378,7 @@ static int nand_do_write_oob(struct mtd_info *mtd, loff_t to, return -EINVAL; } - /* Do not allow reads past end of device */ + /* Do not allow write past end of device */ if (unlikely(to >= mtd->size || ops->ooboffs + ops->ooblen > ((mtd->size >> chip->page_shift) - @@ -3248,7 +3249,7 @@ int nand_scan_tail(struct mtd_info *mtd) /* * If no default placement scheme is given, select an appropriate one */ - if (!chip->ecc.layout) { + if (!chip->ecc.layout && (chip->ecc.mode != NAND_ECC_SOFT_BCH)) { switch (mtd->oobsize) { case 8: chip->ecc.layout = &nand_oob_8; @@ -3351,6 +3352,40 @@ int nand_scan_tail(struct mtd_info *mtd) chip->ecc.bytes = 3; break; + case NAND_ECC_SOFT_BCH: + if (!mtd_nand_has_bch()) { + printk(KERN_WARNING "CONFIG_MTD_ECC_BCH not enabled\n"); + BUG(); + } + chip->ecc.calculate = nand_bch_calculate_ecc; + chip->ecc.correct = nand_bch_correct_data; + chip->ecc.read_page = nand_read_page_swecc; + chip->ecc.read_subpage = nand_read_subpage; + chip->ecc.write_page = nand_write_page_swecc; + chip->ecc.read_page_raw = nand_read_page_raw; + chip->ecc.write_page_raw = nand_write_page_raw; + chip->ecc.read_oob = nand_read_oob_std; + chip->ecc.write_oob = nand_write_oob_std; + /* + * Board driver should supply ecc.size and ecc.bytes values to + * select how many bits are correctable; see nand_bch_init() + * for details. + * Otherwise, default to 4 bits for large page devices + */ + if (!chip->ecc.size && (mtd->oobsize >= 64)) { + chip->ecc.size = 512; + chip->ecc.bytes = 7; + } + chip->ecc.priv = nand_bch_init(mtd, + chip->ecc.size, + chip->ecc.bytes, + &chip->ecc.layout); + if (!chip->ecc.priv) { + printk(KERN_WARNING "BCH ECC initialization failed!\n"); + BUG(); + } + break; + case NAND_ECC_NONE: printk(KERN_WARNING "NAND_ECC_NONE selected by board driver. " "This is not recommended !!\n"); @@ -3501,6 +3536,9 @@ void nand_release(struct mtd_info *mtd) { struct nand_chip *chip = mtd->priv; + if (chip->ecc.mode == NAND_ECC_SOFT_BCH) + nand_bch_free((struct nand_bch_control *)chip->ecc.priv); + #ifdef CONFIG_MTD_PARTITIONS /* Deregister partitions */ del_mtd_partitions(mtd); diff --git a/drivers/mtd/nand/nand_bbt.c b/drivers/mtd/nand/nand_bbt.c index 6ebd869..a1e8b300 100644 --- a/drivers/mtd/nand/nand_bbt.c +++ b/drivers/mtd/nand/nand_bbt.c @@ -1101,12 +1101,16 @@ static void mark_bbt_region(struct mtd_info *mtd, struct nand_bbt_descr *td) static void verify_bbt_descr(struct mtd_info *mtd, struct nand_bbt_descr *bd) { struct nand_chip *this = mtd->priv; - u32 pattern_len = bd->len; - u32 bits = bd->options & NAND_BBT_NRBITS_MSK; + u32 pattern_len; + u32 bits; u32 table_size; if (!bd) return; + + pattern_len = bd->len; + bits = bd->options & NAND_BBT_NRBITS_MSK; + BUG_ON((this->options & NAND_USE_FLASH_BBT_NO_OOB) && !(this->options & NAND_USE_FLASH_BBT)); BUG_ON(!bits); diff --git a/drivers/mtd/nand/nand_bch.c b/drivers/mtd/nand/nand_bch.c new file mode 100644 index 0000000..0f931e7 --- /dev/null +++ b/drivers/mtd/nand/nand_bch.c @@ -0,0 +1,243 @@ +/* + * This file provides ECC correction for more than 1 bit per block of data, + * using binary BCH codes. It relies on the generic BCH library lib/bch.c. + * + * Copyright © 2011 Ivan Djelic <ivan.djelic@parrot.com> + * + * This file is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 or (at your option) any + * later version. + * + * This file is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + * + * You should have received a copy of the GNU General Public License along + * with this file; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. + */ + +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/bitops.h> +#include <linux/mtd/mtd.h> +#include <linux/mtd/nand.h> +#include <linux/mtd/nand_bch.h> +#include <linux/bch.h> + +/** + * struct nand_bch_control - private NAND BCH control structure + * @bch: BCH control structure + * @ecclayout: private ecc layout for this BCH configuration + * @errloc: error location array + * @eccmask: XOR ecc mask, allows erased pages to be decoded as valid + */ +struct nand_bch_control { + struct bch_control *bch; + struct nand_ecclayout ecclayout; + unsigned int *errloc; + unsigned char *eccmask; +}; + +/** + * nand_bch_calculate_ecc - [NAND Interface] Calculate ECC for data block + * @mtd: MTD block structure + * @buf: input buffer with raw data + * @code: output buffer with ECC + */ +int nand_bch_calculate_ecc(struct mtd_info *mtd, const unsigned char *buf, + unsigned char *code) +{ + const struct nand_chip *chip = mtd->priv; + struct nand_bch_control *nbc = chip->ecc.priv; + unsigned int i; + + memset(code, 0, chip->ecc.bytes); + encode_bch(nbc->bch, buf, chip->ecc.size, code); + + /* apply mask so that an erased page is a valid codeword */ + for (i = 0; i < chip->ecc.bytes; i++) + code[i] ^= nbc->eccmask[i]; + + return 0; +} +EXPORT_SYMBOL(nand_bch_calculate_ecc); + +/** + * nand_bch_correct_data - [NAND Interface] Detect and correct bit error(s) + * @mtd: MTD block structure + * @buf: raw data read from the chip + * @read_ecc: ECC from the chip + * @calc_ecc: the ECC calculated from raw data + * + * Detect and correct bit errors for a data byte block + */ +int nand_bch_correct_data(struct mtd_info *mtd, unsigned char *buf, + unsigned char *read_ecc, unsigned char *calc_ecc) +{ + const struct nand_chip *chip = mtd->priv; + struct nand_bch_control *nbc = chip->ecc.priv; + unsigned int *errloc = nbc->errloc; + int i, count; + + count = decode_bch(nbc->bch, NULL, chip->ecc.size, read_ecc, calc_ecc, + NULL, errloc); + if (count > 0) { + for (i = 0; i < count; i++) { + if (errloc[i] < (chip->ecc.size*8)) + /* error is located in data, correct it */ + buf[errloc[i] >> 3] ^= (1 << (errloc[i] & 7)); + /* else error in ecc, no action needed */ + + DEBUG(MTD_DEBUG_LEVEL0, "%s: corrected bitflip %u\n", + __func__, errloc[i]); + } + } else if (count < 0) { + printk(KERN_ERR "ecc unrecoverable error\n"); + count = -1; + } + return count; +} +EXPORT_SYMBOL(nand_bch_correct_data); + +/** + * nand_bch_init - [NAND Interface] Initialize NAND BCH error correction + * @mtd: MTD block structure + * @eccsize: ecc block size in bytes + * @eccbytes: ecc length in bytes + * @ecclayout: output default layout + * + * Returns: + * a pointer to a new NAND BCH control structure, or NULL upon failure + * + * Initialize NAND BCH error correction. Parameters @eccsize and @eccbytes + * are used to compute BCH parameters m (Galois field order) and t (error + * correction capability). @eccbytes should be equal to the number of bytes + * required to store m*t bits, where m is such that 2^m-1 > @eccsize*8. + * + * Example: to configure 4 bit correction per 512 bytes, you should pass + * @eccsize = 512 (thus, m=13 is the smallest integer such that 2^m-1 > 512*8) + * @eccbytes = 7 (7 bytes are required to store m*t = 13*4 = 52 bits) + */ +struct nand_bch_control * +nand_bch_init(struct mtd_info *mtd, unsigned int eccsize, unsigned int eccbytes, + struct nand_ecclayout **ecclayout) +{ + unsigned int m, t, eccsteps, i; + struct nand_ecclayout *layout; + struct nand_bch_control *nbc = NULL; + unsigned char *erased_page; + + if (!eccsize || !eccbytes) { + printk(KERN_WARNING "ecc parameters not supplied\n"); + goto fail; + } + + m = fls(1+8*eccsize); + t = (eccbytes*8)/m; + + nbc = kzalloc(sizeof(*nbc), GFP_KERNEL); + if (!nbc) + goto fail; + + nbc->bch = init_bch(m, t, 0); + if (!nbc->bch) + goto fail; + + /* verify that eccbytes has the expected value */ + if (nbc->bch->ecc_bytes != eccbytes) { + printk(KERN_WARNING "invalid eccbytes %u, should be %u\n", + eccbytes, nbc->bch->ecc_bytes); + goto fail; + } + + eccsteps = mtd->writesize/eccsize; + + /* if no ecc placement scheme was provided, build one */ + if (!*ecclayout) { + + /* handle large page devices only */ + if (mtd->oobsize < 64) { + printk(KERN_WARNING "must provide an oob scheme for " + "oobsize %d\n", mtd->oobsize); + goto fail; + } + + layout = &nbc->ecclayout; + layout->eccbytes = eccsteps*eccbytes; + + /* reserve 2 bytes for bad block marker */ + if (layout->eccbytes+2 > mtd->oobsize) { + printk(KERN_WARNING "no suitable oob scheme available " + "for oobsize %d eccbytes %u\n", mtd->oobsize, + eccbytes); + goto fail; + } + /* put ecc bytes at oob tail */ + for (i = 0; i < layout->eccbytes; i++) + layout->eccpos[i] = mtd->oobsize-layout->eccbytes+i; + + layout->oobfree[0].offset = 2; + layout->oobfree[0].length = mtd->oobsize-2-layout->eccbytes; + + *ecclayout = layout; + } + + /* sanity checks */ + if (8*(eccsize+eccbytes) >= (1 << m)) { + printk(KERN_WARNING "eccsize %u is too large\n", eccsize); + goto fail; + } + if ((*ecclayout)->eccbytes != (eccsteps*eccbytes)) { + printk(KERN_WARNING "invalid ecc layout\n"); + goto fail; + } + + nbc->eccmask = kmalloc(eccbytes, GFP_KERNEL); + nbc->errloc = kmalloc(t*sizeof(*nbc->errloc), GFP_KERNEL); + if (!nbc->eccmask || !nbc->errloc) + goto fail; + /* + * compute and store the inverted ecc of an erased ecc block + */ + erased_page = kmalloc(eccsize, GFP_KERNEL); + if (!erased_page) + goto fail; + + memset(erased_page, 0xff, eccsize); + memset(nbc->eccmask, 0, eccbytes); + encode_bch(nbc->bch, erased_page, eccsize, nbc->eccmask); + kfree(erased_page); + + for (i = 0; i < eccbytes; i++) + nbc->eccmask[i] ^= 0xff; + + return nbc; +fail: + nand_bch_free(nbc); + return NULL; +} +EXPORT_SYMBOL(nand_bch_init); + +/** + * nand_bch_free - [NAND Interface] Release NAND BCH ECC resources + * @nbc: NAND BCH control structure + */ +void nand_bch_free(struct nand_bch_control *nbc) +{ + if (nbc) { + free_bch(nbc->bch); + kfree(nbc->errloc); + kfree(nbc->eccmask); + kfree(nbc); + } +} +EXPORT_SYMBOL(nand_bch_free); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Ivan Djelic <ivan.djelic@parrot.com>"); +MODULE_DESCRIPTION("NAND software BCH ECC support"); diff --git a/drivers/mtd/nand/nandsim.c b/drivers/mtd/nand/nandsim.c index a5aa99f..213181b 100644 --- a/drivers/mtd/nand/nandsim.c +++ b/drivers/mtd/nand/nandsim.c @@ -34,6 +34,7 @@ #include <linux/string.h> #include <linux/mtd/mtd.h> #include <linux/mtd/nand.h> +#include <linux/mtd/nand_bch.h> #include <linux/mtd/partitions.h> #include <linux/delay.h> #include <linux/list.h> @@ -108,6 +109,7 @@ static unsigned int rptwear = 0; static unsigned int overridesize = 0; static char *cache_file = NULL; static unsigned int bbt; +static unsigned int bch; module_param(first_id_byte, uint, 0400); module_param(second_id_byte, uint, 0400); @@ -132,6 +134,7 @@ module_param(rptwear, uint, 0400); module_param(overridesize, uint, 0400); module_param(cache_file, charp, 0400); module_param(bbt, uint, 0400); +module_param(bch, uint, 0400); MODULE_PARM_DESC(first_id_byte, "The first byte returned by NAND Flash 'read ID' command (manufacturer ID)"); MODULE_PARM_DESC(second_id_byte, "The second byte returned by NAND Flash 'read ID' command (chip ID)"); @@ -165,6 +168,8 @@ MODULE_PARM_DESC(overridesize, "Specifies the NAND Flash size overriding the I " e.g. 5 means a size of 32 erase blocks"); MODULE_PARM_DESC(cache_file, "File to use to cache nand pages instead of memory"); MODULE_PARM_DESC(bbt, "0 OOB, 1 BBT with marker in OOB, 2 BBT with marker in data area"); +MODULE_PARM_DESC(bch, "Enable BCH ecc and set how many bits should " + "be correctable in 512-byte blocks"); /* The largest possible page size */ #define NS_LARGEST_PAGE_SIZE 4096 @@ -2309,7 +2314,43 @@ static int __init ns_init_module(void) if ((retval = parse_gravepages()) != 0) goto error; - if ((retval = nand_scan(nsmtd, 1)) != 0) { + retval = nand_scan_ident(nsmtd, 1, NULL); + if (retval) { + NS_ERR("cannot scan NAND Simulator device\n"); + if (retval > 0) + retval = -ENXIO; + goto error; + } + + if (bch) { + unsigned int eccsteps, eccbytes; + if (!mtd_nand_has_bch()) { + NS_ERR("BCH ECC support is disabled\n"); + retval = -EINVAL; + goto error; + } + /* use 512-byte ecc blocks */ + eccsteps = nsmtd->writesize/512; + eccbytes = (bch*13+7)/8; + /* do not bother supporting small page devices */ + if ((nsmtd->oobsize < 64) || !eccsteps) { + NS_ERR("bch not available on small page devices\n"); + retval = -EINVAL; + goto error; + } + if ((eccbytes*eccsteps+2) > nsmtd->oobsize) { + NS_ERR("invalid bch value %u\n", bch); + retval = -EINVAL; + goto error; + } + chip->ecc.mode = NAND_ECC_SOFT_BCH; + chip->ecc.size = 512; + chip->ecc.bytes = eccbytes; + NS_INFO("using %u-bit/%u bytes BCH ECC\n", bch, chip->ecc.size); + } + + retval = nand_scan_tail(nsmtd); + if (retval) { NS_ERR("can't register NAND Simulator\n"); if (retval > 0) retval = -ENXIO; diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c index 7b8f1ff..da9a351 100644 --- a/drivers/mtd/nand/omap2.c +++ b/drivers/mtd/nand/omap2.c @@ -668,6 +668,8 @@ static void gen_true_ecc(u8 *ecc_buf) * * This function compares two ECC's and indicates if there is an error. * If the error can be corrected it will be corrected to the buffer. + * If there is no error, %0 is returned. If there is an error but it + * was corrected, %1 is returned. Otherwise, %-1 is returned. */ static int omap_compare_ecc(u8 *ecc_data1, /* read from NAND memory */ u8 *ecc_data2, /* read from register */ @@ -773,7 +775,7 @@ static int omap_compare_ecc(u8 *ecc_data1, /* read from NAND memory */ page_data[find_byte] ^= (1 << find_bit); - return 0; + return 1; default: if (isEccFF) { if (ecc_data2[0] == 0 && @@ -794,8 +796,11 @@ static int omap_compare_ecc(u8 *ecc_data1, /* read from NAND memory */ * @calc_ecc: ecc read from HW ECC registers * * Compares the ecc read from nand spare area with ECC registers values - * and if ECC's mismached, it will call 'omap_compare_ecc' for error detection - * and correction. + * and if ECC's mismatched, it will call 'omap_compare_ecc' for error + * detection and correction. If there are no errors, %0 is returned. If + * there were errors and all of the errors were corrected, the number of + * corrected errors is returned. If uncorrectable errors exist, %-1 is + * returned. */ static int omap_correct_data(struct mtd_info *mtd, u_char *dat, u_char *read_ecc, u_char *calc_ecc) @@ -803,6 +808,7 @@ static int omap_correct_data(struct mtd_info *mtd, u_char *dat, struct omap_nand_info *info = container_of(mtd, struct omap_nand_info, mtd); int blockCnt = 0, i = 0, ret = 0; + int stat = 0; /* Ex NAND_ECC_HW12_2048 */ if ((info->nand.ecc.mode == NAND_ECC_HW) && @@ -816,12 +822,14 @@ static int omap_correct_data(struct mtd_info *mtd, u_char *dat, ret = omap_compare_ecc(read_ecc, calc_ecc, dat); if (ret < 0) return ret; + /* keep track of the number of corrected errors */ + stat += ret; } read_ecc += 3; calc_ecc += 3; dat += 512; } - return 0; + return stat; } /** diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c index ea2c288..ab7f4c3 100644 --- a/drivers/mtd/nand/pxa3xx_nand.c +++ b/drivers/mtd/nand/pxa3xx_nand.c @@ -27,6 +27,8 @@ #include <plat/pxa3xx_nand.h> #define CHIP_DELAY_TIMEOUT (2 * HZ/10) +#define NAND_STOP_DELAY (2 * HZ/50) +#define PAGE_CHUNK_SIZE (2048) /* registers and bit definitions */ #define NDCR (0x00) /* Control register */ @@ -52,16 +54,18 @@ #define NDCR_ND_MODE (0x3 << 21) #define NDCR_NAND_MODE (0x0) #define NDCR_CLR_PG_CNT (0x1 << 20) -#define NDCR_CLR_ECC (0x1 << 19) +#define NDCR_STOP_ON_UNCOR (0x1 << 19) #define NDCR_RD_ID_CNT_MASK (0x7 << 16) #define NDCR_RD_ID_CNT(x) (((x) << 16) & NDCR_RD_ID_CNT_MASK) #define NDCR_RA_START (0x1 << 15) #define NDCR_PG_PER_BLK (0x1 << 14) #define NDCR_ND_ARB_EN (0x1 << 12) +#define NDCR_INT_MASK (0xFFF) #define NDSR_MASK (0xfff) -#define NDSR_RDY (0x1 << 11) +#define NDSR_RDY (0x1 << 12) +#define NDSR_FLASH_RDY (0x1 << 11) #define NDSR_CS0_PAGED (0x1 << 10) #define NDSR_CS1_PAGED (0x1 << 9) #define NDSR_CS0_CMDD (0x1 << 8) @@ -74,6 +78,7 @@ #define NDSR_RDDREQ (0x1 << 1) #define NDSR_WRCMDREQ (0x1) +#define NDCB0_ST_ROW_EN (0x1 << 26) #define NDCB0_AUTO_RS (0x1 << 25) #define NDCB0_CSEL (0x1 << 24) #define NDCB0_CMD_TYPE_MASK (0x7 << 21) @@ -104,18 +109,21 @@ enum { }; enum { - STATE_READY = 0, + STATE_IDLE = 0, STATE_CMD_HANDLE, STATE_DMA_READING, STATE_DMA_WRITING, STATE_DMA_DONE, STATE_PIO_READING, STATE_PIO_WRITING, + STATE_CMD_DONE, + STATE_READY, }; struct pxa3xx_nand_info { struct nand_chip nand_chip; + struct nand_hw_control controller; struct platform_device *pdev; struct pxa3xx_nand_cmdset *cmdset; @@ -126,6 +134,7 @@ struct pxa3xx_nand_info { unsigned int buf_start; unsigned int buf_count; + struct mtd_info *mtd; /* DMA information */ int drcmr_dat; int drcmr_cmd; @@ -149,6 +158,7 @@ struct pxa3xx_nand_info { int use_ecc; /* use HW ECC ? */ int use_dma; /* use DMA ? */ + int is_ready; unsigned int page_size; /* page size of attached chip */ unsigned int data_size; /* data size in FIFO */ @@ -201,20 +211,22 @@ static struct pxa3xx_nand_timing timing[] = { }; static struct pxa3xx_nand_flash builtin_flash_types[] = { - { 0, 0, 2048, 8, 8, 0, &default_cmdset, &timing[0] }, - { 0x46ec, 32, 512, 16, 16, 4096, &default_cmdset, &timing[1] }, - { 0xdaec, 64, 2048, 8, 8, 2048, &default_cmdset, &timing[1] }, - { 0xd7ec, 128, 4096, 8, 8, 8192, &default_cmdset, &timing[1] }, - { 0xa12c, 64, 2048, 8, 8, 1024, &default_cmdset, &timing[2] }, - { 0xb12c, 64, 2048, 16, 16, 1024, &default_cmdset, &timing[2] }, - { 0xdc2c, 64, 2048, 8, 8, 4096, &default_cmdset, &timing[2] }, - { 0xcc2c, 64, 2048, 16, 16, 4096, &default_cmdset, &timing[2] }, - { 0xba20, 64, 2048, 16, 16, 2048, &default_cmdset, &timing[3] }, +{ "DEFAULT FLASH", 0, 0, 2048, 8, 8, 0, &timing[0] }, +{ "64MiB 16-bit", 0x46ec, 32, 512, 16, 16, 4096, &timing[1] }, +{ "256MiB 8-bit", 0xdaec, 64, 2048, 8, 8, 2048, &timing[1] }, +{ "4GiB 8-bit", 0xd7ec, 128, 4096, 8, 8, 8192, &timing[1] }, +{ "128MiB 8-bit", 0xa12c, 64, 2048, 8, 8, 1024, &timing[2] }, +{ "128MiB 16-bit", 0xb12c, 64, 2048, 16, 16, 1024, &timing[2] }, +{ "512MiB 8-bit", 0xdc2c, 64, 2048, 8, 8, 4096, &timing[2] }, +{ "512MiB 16-bit", 0xcc2c, 64, 2048, 16, 16, 4096, &timing[2] }, +{ "256MiB 16-bit", 0xba20, 64, 2048, 16, 16, 2048, &timing[3] }, }; /* Define a default flash type setting serve as flash detecting only */ #define DEFAULT_FLASH_TYPE (&builtin_flash_types[0]) +const char *mtd_names[] = {"pxa3xx_nand-0", NULL}; + #define NDTR0_tCH(c) (min((c), 7) << 19) #define NDTR0_tCS(c) (min((c), 7) << 16) #define NDTR0_tWH(c) (min((c), 7) << 11) @@ -252,25 +264,6 @@ static void pxa3xx_nand_set_timing(struct pxa3xx_nand_info *info, nand_writel(info, NDTR1CS0, ndtr1); } -#define WAIT_EVENT_TIMEOUT 10 - -static int wait_for_event(struct pxa3xx_nand_info *info, uint32_t event) -{ - int timeout = WAIT_EVENT_TIMEOUT; - uint32_t ndsr; - - while (timeout--) { - ndsr = nand_readl(info, NDSR) & NDSR_MASK; - if (ndsr & event) { - nand_writel(info, NDSR, ndsr); - return 0; - } - udelay(10); - } - - return -ETIMEDOUT; -} - static void pxa3xx_set_datasize(struct pxa3xx_nand_info *info) { int oob_enable = info->reg_ndcr & NDCR_SPARE_EN; @@ -291,69 +284,45 @@ static void pxa3xx_set_datasize(struct pxa3xx_nand_info *info) } } -static int prepare_read_prog_cmd(struct pxa3xx_nand_info *info, - uint16_t cmd, int column, int page_addr) +/** + * NOTE: it is a must to set ND_RUN firstly, then write + * command buffer, otherwise, it does not work. + * We enable all the interrupt at the same time, and + * let pxa3xx_nand_irq to handle all logic. + */ +static void pxa3xx_nand_start(struct pxa3xx_nand_info *info) { - const struct pxa3xx_nand_cmdset *cmdset = info->cmdset; - pxa3xx_set_datasize(info); - - /* generate values for NDCBx registers */ - info->ndcb0 = cmd | ((cmd & 0xff00) ? NDCB0_DBC : 0); - info->ndcb1 = 0; - info->ndcb2 = 0; - info->ndcb0 |= NDCB0_ADDR_CYC(info->row_addr_cycles + info->col_addr_cycles); - - if (info->col_addr_cycles == 2) { - /* large block, 2 cycles for column address - * row address starts from 3rd cycle - */ - info->ndcb1 |= page_addr << 16; - if (info->row_addr_cycles == 3) - info->ndcb2 = (page_addr >> 16) & 0xff; - } else - /* small block, 1 cycles for column address - * row address starts from 2nd cycle - */ - info->ndcb1 = page_addr << 8; - - if (cmd == cmdset->program) - info->ndcb0 |= NDCB0_CMD_TYPE(1) | NDCB0_AUTO_RS; + uint32_t ndcr; - return 0; -} + ndcr = info->reg_ndcr; + ndcr |= info->use_ecc ? NDCR_ECC_EN : 0; + ndcr |= info->use_dma ? NDCR_DMA_EN : 0; + ndcr |= NDCR_ND_RUN; -static int prepare_erase_cmd(struct pxa3xx_nand_info *info, - uint16_t cmd, int page_addr) -{ - info->ndcb0 = cmd | ((cmd & 0xff00) ? NDCB0_DBC : 0); - info->ndcb0 |= NDCB0_CMD_TYPE(2) | NDCB0_AUTO_RS | NDCB0_ADDR_CYC(3); - info->ndcb1 = page_addr; - info->ndcb2 = 0; - return 0; + /* clear status bits and run */ + nand_writel(info, NDCR, 0); + nand_writel(info, NDSR, NDSR_MASK); + nand_writel(info, NDCR, ndcr); } -static int prepare_other_cmd(struct pxa3xx_nand_info *info, uint16_t cmd) +static void pxa3xx_nand_stop(struct pxa3xx_nand_info *info) { - const struct pxa3xx_nand_cmdset *cmdset = info->cmdset; - - info->ndcb0 = cmd | ((cmd & 0xff00) ? NDCB0_DBC : 0); - info->ndcb1 = 0; - info->ndcb2 = 0; + uint32_t ndcr; + int timeout = NAND_STOP_DELAY; - info->oob_size = 0; - if (cmd == cmdset->read_id) { - info->ndcb0 |= NDCB0_CMD_TYPE(3); - info->data_size = 8; - } else if (cmd == cmdset->read_status) { - info->ndcb0 |= NDCB0_CMD_TYPE(4); - info->data_size = 8; - } else if (cmd == cmdset->reset || cmd == cmdset->lock || - cmd == cmdset->unlock) { - info->ndcb0 |= NDCB0_CMD_TYPE(5); - } else - return -EINVAL; + /* wait RUN bit in NDCR become 0 */ + ndcr = nand_readl(info, NDCR); + while ((ndcr & NDCR_ND_RUN) && (timeout-- > 0)) { + ndcr = nand_readl(info, NDCR); + udelay(1); + } - return 0; + if (timeout <= 0) { + ndcr &= ~NDCR_ND_RUN; + nand_writel(info, NDCR, ndcr); + } + /* clear status bits */ + nand_writel(info, NDSR, NDSR_MASK); } static void enable_int(struct pxa3xx_nand_info *info, uint32_t int_mask) @@ -372,39 +341,8 @@ static void disable_int(struct pxa3xx_nand_info *info, uint32_t int_mask) nand_writel(info, NDCR, ndcr | int_mask); } -/* NOTE: it is a must to set ND_RUN firstly, then write command buffer - * otherwise, it does not work - */ -static int write_cmd(struct pxa3xx_nand_info *info) +static void handle_data_pio(struct pxa3xx_nand_info *info) { - uint32_t ndcr; - - /* clear status bits and run */ - nand_writel(info, NDSR, NDSR_MASK); - - ndcr = info->reg_ndcr; - - ndcr |= info->use_ecc ? NDCR_ECC_EN : 0; - ndcr |= info->use_dma ? NDCR_DMA_EN : 0; - ndcr |= NDCR_ND_RUN; - - nand_writel(info, NDCR, ndcr); - - if (wait_for_event(info, NDSR_WRCMDREQ)) { - printk(KERN_ERR "timed out writing command\n"); - return -ETIMEDOUT; - } - - nand_writel(info, NDCB0, info->ndcb0); - nand_writel(info, NDCB0, info->ndcb1); - nand_writel(info, NDCB0, info->ndcb2); - return 0; -} - -static int handle_data_pio(struct pxa3xx_nand_info *info) -{ - int ret, timeout = CHIP_DELAY_TIMEOUT; - switch (info->state) { case STATE_PIO_WRITING: __raw_writesl(info->mmio_base + NDDB, info->data_buff, @@ -412,14 +350,6 @@ static int handle_data_pio(struct pxa3xx_nand_info *info) if (info->oob_size > 0) __raw_writesl(info->mmio_base + NDDB, info->oob_buff, DIV_ROUND_UP(info->oob_size, 4)); - - enable_int(info, NDSR_CS0_BBD | NDSR_CS0_CMDD); - - ret = wait_for_completion_timeout(&info->cmd_complete, timeout); - if (!ret) { - printk(KERN_ERR "program command time out\n"); - return -1; - } break; case STATE_PIO_READING: __raw_readsl(info->mmio_base + NDDB, info->data_buff, @@ -431,14 +361,11 @@ static int handle_data_pio(struct pxa3xx_nand_info *info) default: printk(KERN_ERR "%s: invalid state %d\n", __func__, info->state); - return -EINVAL; + BUG(); } - - info->state = STATE_READY; - return 0; } -static void start_data_dma(struct pxa3xx_nand_info *info, int dir_out) +static void start_data_dma(struct pxa3xx_nand_info *info) { struct pxa_dma_desc *desc = info->data_desc; int dma_len = ALIGN(info->data_size + info->oob_size, 32); @@ -446,14 +373,21 @@ static void start_data_dma(struct pxa3xx_nand_info *info, int dir_out) desc->ddadr = DDADR_STOP; desc->dcmd = DCMD_ENDIRQEN | DCMD_WIDTH4 | DCMD_BURST32 | dma_len; - if (dir_out) { + switch (info->state) { + case STATE_DMA_WRITING: desc->dsadr = info->data_buff_phys; desc->dtadr = info->mmio_phys + NDDB; desc->dcmd |= DCMD_INCSRCADDR | DCMD_FLOWTRG; - } else { + break; + case STATE_DMA_READING: desc->dtadr = info->data_buff_phys; desc->dsadr = info->mmio_phys + NDDB; desc->dcmd |= DCMD_INCTRGADDR | DCMD_FLOWSRC; + break; + default: + printk(KERN_ERR "%s: invalid state %d\n", __func__, + info->state); + BUG(); } DRCMR(info->drcmr_dat) = DRCMR_MAPVLD | info->data_dma_ch; @@ -471,93 +405,62 @@ static void pxa3xx_nand_data_dma_irq(int channel, void *data) if (dcsr & DCSR_BUSERR) { info->retcode = ERR_DMABUSERR; - complete(&info->cmd_complete); } - if (info->state == STATE_DMA_WRITING) { - info->state = STATE_DMA_DONE; - enable_int(info, NDSR_CS0_BBD | NDSR_CS0_CMDD); - } else { - info->state = STATE_READY; - complete(&info->cmd_complete); - } + info->state = STATE_DMA_DONE; + enable_int(info, NDCR_INT_MASK); + nand_writel(info, NDSR, NDSR_WRDREQ | NDSR_RDDREQ); } static irqreturn_t pxa3xx_nand_irq(int irq, void *devid) { struct pxa3xx_nand_info *info = devid; - unsigned int status; + unsigned int status, is_completed = 0; status = nand_readl(info, NDSR); - if (status & (NDSR_RDDREQ | NDSR_DBERR | NDSR_SBERR)) { - if (status & NDSR_DBERR) - info->retcode = ERR_DBERR; - else if (status & NDSR_SBERR) - info->retcode = ERR_SBERR; - - disable_int(info, NDSR_RDDREQ | NDSR_DBERR | NDSR_SBERR); - - if (info->use_dma) { - info->state = STATE_DMA_READING; - start_data_dma(info, 0); - } else { - info->state = STATE_PIO_READING; - complete(&info->cmd_complete); - } - } else if (status & NDSR_WRDREQ) { - disable_int(info, NDSR_WRDREQ); + if (status & NDSR_DBERR) + info->retcode = ERR_DBERR; + if (status & NDSR_SBERR) + info->retcode = ERR_SBERR; + if (status & (NDSR_RDDREQ | NDSR_WRDREQ)) { + /* whether use dma to transfer data */ if (info->use_dma) { - info->state = STATE_DMA_WRITING; - start_data_dma(info, 1); + disable_int(info, NDCR_INT_MASK); + info->state = (status & NDSR_RDDREQ) ? + STATE_DMA_READING : STATE_DMA_WRITING; + start_data_dma(info); + goto NORMAL_IRQ_EXIT; } else { - info->state = STATE_PIO_WRITING; - complete(&info->cmd_complete); + info->state = (status & NDSR_RDDREQ) ? + STATE_PIO_READING : STATE_PIO_WRITING; + handle_data_pio(info); } - } else if (status & (NDSR_CS0_BBD | NDSR_CS0_CMDD)) { - if (status & NDSR_CS0_BBD) - info->retcode = ERR_BBERR; - - disable_int(info, NDSR_CS0_BBD | NDSR_CS0_CMDD); - info->state = STATE_READY; - complete(&info->cmd_complete); } - nand_writel(info, NDSR, status); - return IRQ_HANDLED; -} - -static int pxa3xx_nand_do_cmd(struct pxa3xx_nand_info *info, uint32_t event) -{ - uint32_t ndcr; - int ret, timeout = CHIP_DELAY_TIMEOUT; - - if (write_cmd(info)) { - info->retcode = ERR_SENDCMD; - goto fail_stop; + if (status & NDSR_CS0_CMDD) { + info->state = STATE_CMD_DONE; + is_completed = 1; } - - info->state = STATE_CMD_HANDLE; - - enable_int(info, event); - - ret = wait_for_completion_timeout(&info->cmd_complete, timeout); - if (!ret) { - printk(KERN_ERR "command execution timed out\n"); - info->retcode = ERR_SENDCMD; - goto fail_stop; + if (status & NDSR_FLASH_RDY) { + info->is_ready = 1; + info->state = STATE_READY; } - if (info->use_dma == 0 && info->data_size > 0) - if (handle_data_pio(info)) - goto fail_stop; - - return 0; + if (status & NDSR_WRCMDREQ) { + nand_writel(info, NDSR, NDSR_WRCMDREQ); + status &= ~NDSR_WRCMDREQ; + info->state = STATE_CMD_HANDLE; + nand_writel(info, NDCB0, info->ndcb0); + nand_writel(info, NDCB0, info->ndcb1); + nand_writel(info, NDCB0, info->ndcb2); + } -fail_stop: - ndcr = nand_readl(info, NDCR); - nand_writel(info, NDCR, ndcr & ~NDCR_ND_RUN); - udelay(10); - return -ETIMEDOUT; + /* clear NDSR to let the controller exit the IRQ */ + nand_writel(info, NDSR, status); + if (is_completed) + complete(&info->cmd_complete); +NORMAL_IRQ_EXIT: + return IRQ_HANDLED; } static int pxa3xx_nand_dev_ready(struct mtd_info *mtd) @@ -574,125 +477,218 @@ static inline int is_buf_blank(uint8_t *buf, size_t len) return 1; } -static void pxa3xx_nand_cmdfunc(struct mtd_info *mtd, unsigned command, - int column, int page_addr) +static int prepare_command_pool(struct pxa3xx_nand_info *info, int command, + uint16_t column, int page_addr) { - struct pxa3xx_nand_info *info = mtd->priv; - const struct pxa3xx_nand_cmdset *cmdset = info->cmdset; - int ret; + uint16_t cmd; + int addr_cycle, exec_cmd, ndcb0; + struct mtd_info *mtd = info->mtd; + + ndcb0 = 0; + addr_cycle = 0; + exec_cmd = 1; + + /* reset data and oob column point to handle data */ + info->buf_start = 0; + info->buf_count = 0; + info->oob_size = 0; + info->use_ecc = 0; + info->is_ready = 0; + info->retcode = ERR_NONE; - info->use_dma = (use_dma) ? 1 : 0; - info->use_ecc = 0; - info->data_size = 0; - info->state = STATE_READY; + switch (command) { + case NAND_CMD_READ0: + case NAND_CMD_PAGEPROG: + info->use_ecc = 1; + case NAND_CMD_READOOB: + pxa3xx_set_datasize(info); + break; + case NAND_CMD_SEQIN: + exec_cmd = 0; + break; + default: + info->ndcb1 = 0; + info->ndcb2 = 0; + break; + } - init_completion(&info->cmd_complete); + info->ndcb0 = ndcb0; + addr_cycle = NDCB0_ADDR_CYC(info->row_addr_cycles + + info->col_addr_cycles); switch (command) { case NAND_CMD_READOOB: - /* disable HW ECC to get all the OOB data */ - info->buf_count = mtd->writesize + mtd->oobsize; - info->buf_start = mtd->writesize + column; - memset(info->data_buff, 0xFF, info->buf_count); + case NAND_CMD_READ0: + cmd = info->cmdset->read1; + if (command == NAND_CMD_READOOB) + info->buf_start = mtd->writesize + column; + else + info->buf_start = column; - if (prepare_read_prog_cmd(info, cmdset->read1, column, page_addr)) - break; + if (unlikely(info->page_size < PAGE_CHUNK_SIZE)) + info->ndcb0 |= NDCB0_CMD_TYPE(0) + | addr_cycle + | (cmd & NDCB0_CMD1_MASK); + else + info->ndcb0 |= NDCB0_CMD_TYPE(0) + | NDCB0_DBC + | addr_cycle + | cmd; - pxa3xx_nand_do_cmd(info, NDSR_RDDREQ | NDSR_DBERR | NDSR_SBERR); + case NAND_CMD_SEQIN: + /* small page addr setting */ + if (unlikely(info->page_size < PAGE_CHUNK_SIZE)) { + info->ndcb1 = ((page_addr & 0xFFFFFF) << 8) + | (column & 0xFF); - /* We only are OOB, so if the data has error, does not matter */ - if (info->retcode == ERR_DBERR) - info->retcode = ERR_NONE; - break; + info->ndcb2 = 0; + } else { + info->ndcb1 = ((page_addr & 0xFFFF) << 16) + | (column & 0xFFFF); + + if (page_addr & 0xFF0000) + info->ndcb2 = (page_addr & 0xFF0000) >> 16; + else + info->ndcb2 = 0; + } - case NAND_CMD_READ0: - info->use_ecc = 1; - info->retcode = ERR_NONE; - info->buf_start = column; info->buf_count = mtd->writesize + mtd->oobsize; memset(info->data_buff, 0xFF, info->buf_count); - if (prepare_read_prog_cmd(info, cmdset->read1, column, page_addr)) + break; + + case NAND_CMD_PAGEPROG: + if (is_buf_blank(info->data_buff, + (mtd->writesize + mtd->oobsize))) { + exec_cmd = 0; break; + } - pxa3xx_nand_do_cmd(info, NDSR_RDDREQ | NDSR_DBERR | NDSR_SBERR); + cmd = info->cmdset->program; + info->ndcb0 |= NDCB0_CMD_TYPE(0x1) + | NDCB0_AUTO_RS + | NDCB0_ST_ROW_EN + | NDCB0_DBC + | cmd + | addr_cycle; + break; - if (info->retcode == ERR_DBERR) { - /* for blank page (all 0xff), HW will calculate its ECC as - * 0, which is different from the ECC information within - * OOB, ignore such double bit errors - */ - if (is_buf_blank(info->data_buff, mtd->writesize)) - info->retcode = ERR_NONE; - } + case NAND_CMD_READID: + cmd = info->cmdset->read_id; + info->buf_count = info->read_id_bytes; + info->ndcb0 |= NDCB0_CMD_TYPE(3) + | NDCB0_ADDR_CYC(1) + | cmd; + + info->data_size = 8; break; - case NAND_CMD_SEQIN: - info->buf_start = column; - info->buf_count = mtd->writesize + mtd->oobsize; - memset(info->data_buff, 0xff, info->buf_count); + case NAND_CMD_STATUS: + cmd = info->cmdset->read_status; + info->buf_count = 1; + info->ndcb0 |= NDCB0_CMD_TYPE(4) + | NDCB0_ADDR_CYC(1) + | cmd; - /* save column/page_addr for next CMD_PAGEPROG */ - info->seqin_column = column; - info->seqin_page_addr = page_addr; + info->data_size = 8; break; - case NAND_CMD_PAGEPROG: - info->use_ecc = (info->seqin_column >= mtd->writesize) ? 0 : 1; - if (prepare_read_prog_cmd(info, cmdset->program, - info->seqin_column, info->seqin_page_addr)) - break; + case NAND_CMD_ERASE1: + cmd = info->cmdset->erase; + info->ndcb0 |= NDCB0_CMD_TYPE(2) + | NDCB0_AUTO_RS + | NDCB0_ADDR_CYC(3) + | NDCB0_DBC + | cmd; + info->ndcb1 = page_addr; + info->ndcb2 = 0; - pxa3xx_nand_do_cmd(info, NDSR_WRDREQ); break; - case NAND_CMD_ERASE1: - if (prepare_erase_cmd(info, cmdset->erase, page_addr)) - break; + case NAND_CMD_RESET: + cmd = info->cmdset->reset; + info->ndcb0 |= NDCB0_CMD_TYPE(5) + | cmd; - pxa3xx_nand_do_cmd(info, NDSR_CS0_BBD | NDSR_CS0_CMDD); break; + case NAND_CMD_ERASE2: + exec_cmd = 0; break; - case NAND_CMD_READID: - case NAND_CMD_STATUS: - info->use_dma = 0; /* force PIO read */ - info->buf_start = 0; - info->buf_count = (command == NAND_CMD_READID) ? - info->read_id_bytes : 1; - - if (prepare_other_cmd(info, (command == NAND_CMD_READID) ? - cmdset->read_id : cmdset->read_status)) - break; - pxa3xx_nand_do_cmd(info, NDSR_RDDREQ); + default: + exec_cmd = 0; + printk(KERN_ERR "pxa3xx-nand: non-supported" + " command %x\n", command); break; - case NAND_CMD_RESET: - if (prepare_other_cmd(info, cmdset->reset)) - break; + } - ret = pxa3xx_nand_do_cmd(info, NDSR_CS0_CMDD); - if (ret == 0) { - int timeout = 2; - uint32_t ndcr; + return exec_cmd; +} - while (timeout--) { - if (nand_readl(info, NDSR) & NDSR_RDY) - break; - msleep(10); - } +static void pxa3xx_nand_cmdfunc(struct mtd_info *mtd, unsigned command, + int column, int page_addr) +{ + struct pxa3xx_nand_info *info = mtd->priv; + int ret, exec_cmd; - ndcr = nand_readl(info, NDCR); - nand_writel(info, NDCR, ndcr & ~NDCR_ND_RUN); + /* + * if this is a x16 device ,then convert the input + * "byte" address into a "word" address appropriate + * for indexing a word-oriented device + */ + if (info->reg_ndcr & NDCR_DWIDTH_M) + column /= 2; + + exec_cmd = prepare_command_pool(info, command, column, page_addr); + if (exec_cmd) { + init_completion(&info->cmd_complete); + pxa3xx_nand_start(info); + + ret = wait_for_completion_timeout(&info->cmd_complete, + CHIP_DELAY_TIMEOUT); + if (!ret) { + printk(KERN_ERR "Wait time out!!!\n"); + /* Stop State Machine for next command cycle */ + pxa3xx_nand_stop(info); } - break; - default: - printk(KERN_ERR "non-supported command.\n"); - break; + info->state = STATE_IDLE; } +} + +static void pxa3xx_nand_write_page_hwecc(struct mtd_info *mtd, + struct nand_chip *chip, const uint8_t *buf) +{ + chip->write_buf(mtd, buf, mtd->writesize); + chip->write_buf(mtd, chip->oob_poi, mtd->oobsize); +} - if (info->retcode == ERR_DBERR) { - printk(KERN_ERR "double bit error @ page %08x\n", page_addr); - info->retcode = ERR_NONE; +static int pxa3xx_nand_read_page_hwecc(struct mtd_info *mtd, + struct nand_chip *chip, uint8_t *buf, int page) +{ + struct pxa3xx_nand_info *info = mtd->priv; + + chip->read_buf(mtd, buf, mtd->writesize); + chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); + + if (info->retcode == ERR_SBERR) { + switch (info->use_ecc) { + case 1: + mtd->ecc_stats.corrected++; + break; + case 0: + default: + break; + } + } else if (info->retcode == ERR_DBERR) { + /* + * for blank page (all 0xff), HW will calculate its ECC as + * 0, which is different from the ECC information within + * OOB, ignore such double bit errors + */ + if (is_buf_blank(buf, mtd->writesize)) + mtd->ecc_stats.failed++; } + + return 0; } static uint8_t pxa3xx_nand_read_byte(struct mtd_info *mtd) @@ -769,73 +765,12 @@ static int pxa3xx_nand_waitfunc(struct mtd_info *mtd, struct nand_chip *this) return 0; } -static void pxa3xx_nand_ecc_hwctl(struct mtd_info *mtd, int mode) -{ - return; -} - -static int pxa3xx_nand_ecc_calculate(struct mtd_info *mtd, - const uint8_t *dat, uint8_t *ecc_code) -{ - return 0; -} - -static int pxa3xx_nand_ecc_correct(struct mtd_info *mtd, - uint8_t *dat, uint8_t *read_ecc, uint8_t *calc_ecc) -{ - struct pxa3xx_nand_info *info = mtd->priv; - /* - * Any error include ERR_SEND_CMD, ERR_DBERR, ERR_BUSERR, we - * consider it as a ecc error which will tell the caller the - * read fail We have distinguish all the errors, but the - * nand_read_ecc only check this function return value - * - * Corrected (single-bit) errors must also be noted. - */ - if (info->retcode == ERR_SBERR) - return 1; - else if (info->retcode != ERR_NONE) - return -1; - - return 0; -} - -static int __readid(struct pxa3xx_nand_info *info, uint32_t *id) -{ - const struct pxa3xx_nand_cmdset *cmdset = info->cmdset; - uint32_t ndcr; - uint8_t id_buff[8]; - - if (prepare_other_cmd(info, cmdset->read_id)) { - printk(KERN_ERR "failed to prepare command\n"); - return -EINVAL; - } - - /* Send command */ - if (write_cmd(info)) - goto fail_timeout; - - /* Wait for CMDDM(command done successfully) */ - if (wait_for_event(info, NDSR_RDDREQ)) - goto fail_timeout; - - __raw_readsl(info->mmio_base + NDDB, id_buff, 2); - *id = id_buff[0] | (id_buff[1] << 8); - return 0; - -fail_timeout: - ndcr = nand_readl(info, NDCR); - nand_writel(info, NDCR, ndcr & ~NDCR_ND_RUN); - udelay(10); - return -ETIMEDOUT; -} - static int pxa3xx_nand_config_flash(struct pxa3xx_nand_info *info, const struct pxa3xx_nand_flash *f) { struct platform_device *pdev = info->pdev; struct pxa3xx_nand_platform_data *pdata = pdev->dev.platform_data; - uint32_t ndcr = 0x00000FFF; /* disable all interrupts */ + uint32_t ndcr = 0x0; /* enable all interrupts */ if (f->page_size != 2048 && f->page_size != 512) return -EINVAL; @@ -844,9 +779,8 @@ static int pxa3xx_nand_config_flash(struct pxa3xx_nand_info *info, return -EINVAL; /* calculate flash information */ - info->cmdset = f->cmdset; + info->cmdset = &default_cmdset; info->page_size = f->page_size; - info->oob_buff = info->data_buff + f->page_size; info->read_id_bytes = (f->page_size == 2048) ? 4 : 2; /* calculate addressing information */ @@ -876,87 +810,18 @@ static int pxa3xx_nand_config_flash(struct pxa3xx_nand_info *info, static int pxa3xx_nand_detect_config(struct pxa3xx_nand_info *info) { uint32_t ndcr = nand_readl(info, NDCR); - struct nand_flash_dev *type = NULL; - uint32_t id = -1, page_per_block, num_blocks; - int i; - - page_per_block = ndcr & NDCR_PG_PER_BLK ? 64 : 32; info->page_size = ndcr & NDCR_PAGE_SZ ? 2048 : 512; - /* set info fields needed to __readid */ + /* set info fields needed to read id */ info->read_id_bytes = (info->page_size == 2048) ? 4 : 2; info->reg_ndcr = ndcr; info->cmdset = &default_cmdset; - if (__readid(info, &id)) - return -ENODEV; - - /* Lookup the flash id */ - id = (id >> 8) & 0xff; /* device id is byte 2 */ - for (i = 0; nand_flash_ids[i].name != NULL; i++) { - if (id == nand_flash_ids[i].id) { - type = &nand_flash_ids[i]; - break; - } - } - - if (!type) - return -ENODEV; - - /* fill the missing flash information */ - i = __ffs(page_per_block * info->page_size); - num_blocks = type->chipsize << (20 - i); - - /* calculate addressing information */ - info->col_addr_cycles = (info->page_size == 2048) ? 2 : 1; - - if (num_blocks * page_per_block > 65536) - info->row_addr_cycles = 3; - else - info->row_addr_cycles = 2; - info->ndtr0cs0 = nand_readl(info, NDTR0CS0); info->ndtr1cs0 = nand_readl(info, NDTR1CS0); return 0; } -static int pxa3xx_nand_detect_flash(struct pxa3xx_nand_info *info, - const struct pxa3xx_nand_platform_data *pdata) -{ - const struct pxa3xx_nand_flash *f; - uint32_t id = -1; - int i; - - if (pdata->keep_config) - if (pxa3xx_nand_detect_config(info) == 0) - return 0; - - /* we use default timing to detect id */ - f = DEFAULT_FLASH_TYPE; - pxa3xx_nand_config_flash(info, f); - if (__readid(info, &id)) - goto fail_detect; - - for (i=0; i<ARRAY_SIZE(builtin_flash_types) + pdata->num_flash - 1; i++) { - /* we first choose the flash definition from platfrom */ - if (i < pdata->num_flash) - f = pdata->flash + i; - else - f = &builtin_flash_types[i - pdata->num_flash + 1]; - if (f->chip_id == id) { - dev_info(&info->pdev->dev, "detect chip id: 0x%x\n", id); - pxa3xx_nand_config_flash(info, f); - return 0; - } - } - - dev_warn(&info->pdev->dev, - "failed to detect configured nand flash; found %04x instead of\n", - id); -fail_detect: - return -ENODEV; -} - /* the maximum possible buffer size for large page with OOB data * is: 2048 + 64 = 2112 bytes, allocate a page here for both the * data buffer and the DMA descriptor @@ -998,82 +863,144 @@ static int pxa3xx_nand_init_buff(struct pxa3xx_nand_info *info) return 0; } -static struct nand_ecclayout hw_smallpage_ecclayout = { - .eccbytes = 6, - .eccpos = {8, 9, 10, 11, 12, 13 }, - .oobfree = { {2, 6} } -}; +static int pxa3xx_nand_sensing(struct pxa3xx_nand_info *info) +{ + struct mtd_info *mtd = info->mtd; + struct nand_chip *chip = mtd->priv; -static struct nand_ecclayout hw_largepage_ecclayout = { - .eccbytes = 24, - .eccpos = { - 40, 41, 42, 43, 44, 45, 46, 47, - 48, 49, 50, 51, 52, 53, 54, 55, - 56, 57, 58, 59, 60, 61, 62, 63}, - .oobfree = { {2, 38} } -}; + /* use the common timing to make a try */ + pxa3xx_nand_config_flash(info, &builtin_flash_types[0]); + chip->cmdfunc(mtd, NAND_CMD_RESET, 0, 0); + if (info->is_ready) + return 1; + else + return 0; +} -static void pxa3xx_nand_init_mtd(struct mtd_info *mtd, - struct pxa3xx_nand_info *info) +static int pxa3xx_nand_scan(struct mtd_info *mtd) { - struct nand_chip *this = &info->nand_chip; - - this->options = (info->reg_ndcr & NDCR_DWIDTH_C) ? NAND_BUSWIDTH_16: 0; - - this->waitfunc = pxa3xx_nand_waitfunc; - this->select_chip = pxa3xx_nand_select_chip; - this->dev_ready = pxa3xx_nand_dev_ready; - this->cmdfunc = pxa3xx_nand_cmdfunc; - this->read_word = pxa3xx_nand_read_word; - this->read_byte = pxa3xx_nand_read_byte; - this->read_buf = pxa3xx_nand_read_buf; - this->write_buf = pxa3xx_nand_write_buf; - this->verify_buf = pxa3xx_nand_verify_buf; - - this->ecc.mode = NAND_ECC_HW; - this->ecc.hwctl = pxa3xx_nand_ecc_hwctl; - this->ecc.calculate = pxa3xx_nand_ecc_calculate; - this->ecc.correct = pxa3xx_nand_ecc_correct; - this->ecc.size = info->page_size; - - if (info->page_size == 2048) - this->ecc.layout = &hw_largepage_ecclayout; + struct pxa3xx_nand_info *info = mtd->priv; + struct platform_device *pdev = info->pdev; + struct pxa3xx_nand_platform_data *pdata = pdev->dev.platform_data; + struct nand_flash_dev pxa3xx_flash_ids[2] = { {NULL,}, {NULL,} }; + const struct pxa3xx_nand_flash *f = NULL; + struct nand_chip *chip = mtd->priv; + uint32_t id = -1; + uint64_t chipsize; + int i, ret, num; + + if (pdata->keep_config && !pxa3xx_nand_detect_config(info)) + goto KEEP_CONFIG; + + ret = pxa3xx_nand_sensing(info); + if (!ret) { + kfree(mtd); + info->mtd = NULL; + printk(KERN_INFO "There is no nand chip on cs 0!\n"); + + return -EINVAL; + } + + chip->cmdfunc(mtd, NAND_CMD_READID, 0, 0); + id = *((uint16_t *)(info->data_buff)); + if (id != 0) + printk(KERN_INFO "Detect a flash id %x\n", id); + else { + kfree(mtd); + info->mtd = NULL; + printk(KERN_WARNING "Read out ID 0, potential timing set wrong!!\n"); + + return -EINVAL; + } + + num = ARRAY_SIZE(builtin_flash_types) + pdata->num_flash - 1; + for (i = 0; i < num; i++) { + if (i < pdata->num_flash) + f = pdata->flash + i; + else + f = &builtin_flash_types[i - pdata->num_flash + 1]; + + /* find the chip in default list */ + if (f->chip_id == id) + break; + } + + if (i >= (ARRAY_SIZE(builtin_flash_types) + pdata->num_flash - 1)) { + kfree(mtd); + info->mtd = NULL; + printk(KERN_ERR "ERROR!! flash not defined!!!\n"); + + return -EINVAL; + } + + pxa3xx_nand_config_flash(info, f); + pxa3xx_flash_ids[0].name = f->name; + pxa3xx_flash_ids[0].id = (f->chip_id >> 8) & 0xffff; + pxa3xx_flash_ids[0].pagesize = f->page_size; + chipsize = (uint64_t)f->num_blocks * f->page_per_block * f->page_size; + pxa3xx_flash_ids[0].chipsize = chipsize >> 20; + pxa3xx_flash_ids[0].erasesize = f->page_size * f->page_per_block; + if (f->flash_width == 16) + pxa3xx_flash_ids[0].options = NAND_BUSWIDTH_16; +KEEP_CONFIG: + if (nand_scan_ident(mtd, 1, pxa3xx_flash_ids)) + return -ENODEV; + /* calculate addressing information */ + info->col_addr_cycles = (mtd->writesize >= 2048) ? 2 : 1; + info->oob_buff = info->data_buff + mtd->writesize; + if ((mtd->size >> chip->page_shift) > 65536) + info->row_addr_cycles = 3; else - this->ecc.layout = &hw_smallpage_ecclayout; + info->row_addr_cycles = 2; + mtd->name = mtd_names[0]; + chip->ecc.mode = NAND_ECC_HW; + chip->ecc.size = f->page_size; + + chip->options = (f->flash_width == 16) ? NAND_BUSWIDTH_16 : 0; + chip->options |= NAND_NO_AUTOINCR; + chip->options |= NAND_NO_READRDY; - this->chip_delay = 25; + return nand_scan_tail(mtd); } -static int pxa3xx_nand_probe(struct platform_device *pdev) +static +struct pxa3xx_nand_info *alloc_nand_resource(struct platform_device *pdev) { - struct pxa3xx_nand_platform_data *pdata; struct pxa3xx_nand_info *info; - struct nand_chip *this; + struct nand_chip *chip; struct mtd_info *mtd; struct resource *r; - int ret = 0, irq; - - pdata = pdev->dev.platform_data; - - if (!pdata) { - dev_err(&pdev->dev, "no platform data defined\n"); - return -ENODEV; - } + int ret, irq; mtd = kzalloc(sizeof(struct mtd_info) + sizeof(struct pxa3xx_nand_info), GFP_KERNEL); if (!mtd) { dev_err(&pdev->dev, "failed to allocate memory\n"); - return -ENOMEM; + return NULL; } info = (struct pxa3xx_nand_info *)(&mtd[1]); + chip = (struct nand_chip *)(&mtd[1]); info->pdev = pdev; - - this = &info->nand_chip; + info->mtd = mtd; mtd->priv = info; mtd->owner = THIS_MODULE; + chip->ecc.read_page = pxa3xx_nand_read_page_hwecc; + chip->ecc.write_page = pxa3xx_nand_write_page_hwecc; + chip->controller = &info->controller; + chip->waitfunc = pxa3xx_nand_waitfunc; + chip->select_chip = pxa3xx_nand_select_chip; + chip->dev_ready = pxa3xx_nand_dev_ready; + chip->cmdfunc = pxa3xx_nand_cmdfunc; + chip->read_word = pxa3xx_nand_read_word; + chip->read_byte = pxa3xx_nand_read_byte; + chip->read_buf = pxa3xx_nand_read_buf; + chip->write_buf = pxa3xx_nand_write_buf; + chip->verify_buf = pxa3xx_nand_verify_buf; + + spin_lock_init(&chip->controller->lock); + init_waitqueue_head(&chip->controller->wq); info->clk = clk_get(&pdev->dev, NULL); if (IS_ERR(info->clk)) { dev_err(&pdev->dev, "failed to get nand clock\n"); @@ -1141,43 +1068,12 @@ static int pxa3xx_nand_probe(struct platform_device *pdev) goto fail_free_buf; } - ret = pxa3xx_nand_detect_flash(info, pdata); - if (ret) { - dev_err(&pdev->dev, "failed to detect flash\n"); - ret = -ENODEV; - goto fail_free_irq; - } - - pxa3xx_nand_init_mtd(mtd, info); - - platform_set_drvdata(pdev, mtd); - - if (nand_scan(mtd, 1)) { - dev_err(&pdev->dev, "failed to scan nand\n"); - ret = -ENXIO; - goto fail_free_irq; - } - -#ifdef CONFIG_MTD_PARTITIONS - if (mtd_has_cmdlinepart()) { - static const char *probes[] = { "cmdlinepart", NULL }; - struct mtd_partition *parts; - int nr_parts; - - nr_parts = parse_mtd_partitions(mtd, probes, &parts, 0); - - if (nr_parts) - return add_mtd_partitions(mtd, parts, nr_parts); - } + platform_set_drvdata(pdev, info); - return add_mtd_partitions(mtd, pdata->parts, pdata->nr_parts); -#else - return 0; -#endif + return info; -fail_free_irq: - free_irq(irq, info); fail_free_buf: + free_irq(irq, info); if (use_dma) { pxa_free_dma(info->data_dma_ch); dma_free_coherent(&pdev->dev, info->data_buff_size, @@ -1193,22 +1089,18 @@ fail_put_clk: clk_put(info->clk); fail_free_mtd: kfree(mtd); - return ret; + return NULL; } static int pxa3xx_nand_remove(struct platform_device *pdev) { - struct mtd_info *mtd = platform_get_drvdata(pdev); - struct pxa3xx_nand_info *info = mtd->priv; + struct pxa3xx_nand_info *info = platform_get_drvdata(pdev); + struct mtd_info *mtd = info->mtd; struct resource *r; int irq; platform_set_drvdata(pdev, NULL); - del_mtd_device(mtd); -#ifdef CONFIG_MTD_PARTITIONS - del_mtd_partitions(mtd); -#endif irq = platform_get_irq(pdev, 0); if (irq >= 0) free_irq(irq, info); @@ -1226,17 +1118,62 @@ static int pxa3xx_nand_remove(struct platform_device *pdev) clk_disable(info->clk); clk_put(info->clk); - kfree(mtd); + if (mtd) { + del_mtd_device(mtd); +#ifdef CONFIG_MTD_PARTITIONS + del_mtd_partitions(mtd); +#endif + kfree(mtd); + } return 0; } +static int pxa3xx_nand_probe(struct platform_device *pdev) +{ + struct pxa3xx_nand_platform_data *pdata; + struct pxa3xx_nand_info *info; + + pdata = pdev->dev.platform_data; + if (!pdata) { + dev_err(&pdev->dev, "no platform data defined\n"); + return -ENODEV; + } + + info = alloc_nand_resource(pdev); + if (info == NULL) + return -ENOMEM; + + if (pxa3xx_nand_scan(info->mtd)) { + dev_err(&pdev->dev, "failed to scan nand\n"); + pxa3xx_nand_remove(pdev); + return -ENODEV; + } + +#ifdef CONFIG_MTD_PARTITIONS + if (mtd_has_cmdlinepart()) { + const char *probes[] = { "cmdlinepart", NULL }; + struct mtd_partition *parts; + int nr_parts; + + nr_parts = parse_mtd_partitions(info->mtd, probes, &parts, 0); + + if (nr_parts) + return add_mtd_partitions(info->mtd, parts, nr_parts); + } + + return add_mtd_partitions(info->mtd, pdata->parts, pdata->nr_parts); +#else + return 0; +#endif +} + #ifdef CONFIG_PM static int pxa3xx_nand_suspend(struct platform_device *pdev, pm_message_t state) { - struct mtd_info *mtd = (struct mtd_info *)platform_get_drvdata(pdev); - struct pxa3xx_nand_info *info = mtd->priv; + struct pxa3xx_nand_info *info = platform_get_drvdata(pdev); + struct mtd_info *mtd = info->mtd; - if (info->state != STATE_READY) { + if (info->state) { dev_err(&pdev->dev, "driver busy, state = %d\n", info->state); return -EAGAIN; } @@ -1246,8 +1183,8 @@ static int pxa3xx_nand_suspend(struct platform_device *pdev, pm_message_t state) static int pxa3xx_nand_resume(struct platform_device *pdev) { - struct mtd_info *mtd = (struct mtd_info *)platform_get_drvdata(pdev); - struct pxa3xx_nand_info *info = mtd->priv; + struct pxa3xx_nand_info *info = platform_get_drvdata(pdev); + struct mtd_info *mtd = info->mtd; nand_writel(info, NDTR0CS0, info->ndtr0cs0); nand_writel(info, NDTR1CS0, info->ndtr1cs0); |