/* * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved. * Copyright 2008 Sascha Hauer, Pengutronix */ /* * The code contained herein is licensed under the GNU General Public * License. You may obtain a copy of the GNU General Public License * Version 2 or later at the following locations: * * http://www.opensource.org/licenses/gpl-license.html * http://www.gnu.org/copyleft/gpl.html */ /* * MX21 Hardware contains a bug which causes HW ECC to fail for two * consecutive read pages containing 1bit Errors (See MX21 Chip Erata, * Erratum 16). Use software ECC for this chip. */ #include #include #include #include #include #include #include #include #include #include #include #define nfc_is_v21() (cpu_is_mx25() || cpu_is_mx35()) #define nfc_is_v1() (cpu_is_mx31() || cpu_is_mx27() || cpu_is_mx21()) #define NFC_V1_ECC_STATUS_RESULT 0x0c #define NFC_V1_RSLTMAIN_AREA 0x0e #define NFC_V1_RSLTSPARE_AREA 0x10 #define NFC_V2_ECC_STATUS_RESULT1 0x0c #define NFC_V2_ECC_STATUS_RESULT2 0x0e #define NFC_V2_SPAS 0x10 #define NFC_V1_V2_BUF_SIZE 0x00 #define NFC_V1_V2_BUF_ADDR 0x04 #define NFC_V1_V2_FLASH_ADDR 0x06 #define NFC_V1_V2_FLASH_CMD 0x08 #define NFC_V1_V2_CONFIG 0x0a #define NFC_V1_V2_WRPROT 0x12 #define NFC_V1_UNLOCKSTART_BLKADDR 0x14 #define NFC_V1_UNLOCKEND_BLKADDR 0x16 #define NFC_V21_UNLOCKSTART_BLKADDR 0x20 #define NFC_V21_UNLOCKEND_BLKADDR 0x22 #define NFC_V1_V2_NF_WRPRST 0x18 #define NFC_V1_V2_CONFIG1 0x1a #define NFC_V1_V2_CONFIG2 0x1c #define NFC_V2_CONFIG1_ECC_MODE_4 (1 << 0) #define NFC_V1_V2_CONFIG1_SP_EN (1 << 2) #define NFC_V1_V2_CONFIG1_ECC_EN (1 << 3) #define NFC_V1_V2_CONFIG1_INT_MSK (1 << 4) #define NFC_V1_V2_CONFIG1_BIG (1 << 5) #define NFC_V1_V2_CONFIG1_RST (1 << 6) #define NFC_V1_V2_CONFIG1_CE (1 << 7) #define NFC_V1_V2_CONFIG1_ONE_CYCLE (1 << 8) #define NFC_V1_V2_CONFIG2_INT (1 << 15) #define NFC_V2_SPAS_SPARESIZE(spas) ((spas) >> 1) /* * Operation modes for the NFC. Valid for v1, v2 and v3 * type controllers. */ #define NFC_CMD (1 << 0) #define NFC_ADDR (1 << 1) #define NFC_INPUT (1 << 2) #define NFC_OUTPUT (1 << 3) #define NFC_ID (1 << 4) #define NFC_STATUS (1 << 5) #ifdef CONFIG_NAND_IMX_BOOT #define __nand_boot_init __bare_init #else #define __nand_boot_init #endif struct imx_nand_host { struct mtd_info mtd; struct nand_chip nand; struct mtd_partition *parts; struct device_d *dev; void *spare0; void *main_area0; void __iomem *base; void __iomem *regs; int status_request; struct clk *clk; int pagesize_2k; uint8_t *data_buf; unsigned int buf_start; int spare_len; void (*preset)(struct mtd_info *); void (*send_cmd)(struct imx_nand_host *, uint16_t); void (*send_addr)(struct imx_nand_host *, uint16_t); void (*send_page)(struct imx_nand_host *, unsigned int); void (*send_read_id)(struct imx_nand_host *); uint16_t (*get_dev_status)(struct imx_nand_host *); }; /* * OOB placement block for use with hardware ecc generation */ 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 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} } }; static void memcpy32(void *trg, const void *src, int size) { int i; unsigned int *t = trg; unsigned const int *s = src; #ifdef CONFIG_ARM_OPTIMZED_STRING_FUNCTIONS if (!((unsigned long)trg & 0x3) && !((unsigned long)src & 0x3)) memcpy(trg, src, size); else #endif for (i = 0; i < (size >> 2); i++) *t++ = *s++; } /* * This function polls the NANDFC to wait for the basic operation to complete by * checking the INT bit of config2 register. * * @param max_retries number of retry attempts (separated by 1 us) * @param param parameter for debug */ static void wait_op_done(struct imx_nand_host *host) { u32 tmp; int i; /* This is a timeout of roughly 15ms on my system. We * need about 2us, but be generous. Don't use udelay * here as we might be here from nand booting. */ for (i = 0; i < 100000; i++) { if (readw(host->regs + NFC_V1_V2_CONFIG2) & NFC_V1_V2_CONFIG2_INT) { tmp = readw(host->regs + NFC_V1_V2_CONFIG2); tmp &= ~NFC_V1_V2_CONFIG2_INT; writew(tmp, host->regs + NFC_V1_V2_CONFIG2); return; } } } /* * This function issues the specified command to the NAND device and * waits for completion. * * @param cmd command for NAND Flash */ static void send_cmd_v1_v2(struct imx_nand_host *host, u16 cmd) { MTD_DEBUG(MTD_DEBUG_LEVEL3, "send_cmd(host, 0x%x)\n", cmd); writew(cmd, host->regs + NFC_V1_V2_FLASH_CMD); writew(NFC_CMD, host->regs + NFC_V1_V2_CONFIG2); if (cpu_is_mx21() && (cmd == NAND_CMD_RESET)) { /* Reset completion is indicated by NFC_CONFIG2 */ /* being set to 0 */ int i; for (i = 0; i < 100000; i++) { if (readw(host->regs + NFC_V1_V2_CONFIG2) == 0) { break; } } } else /* Wait for operation to complete */ wait_op_done(host); } /* * This function sends an address (or partial address) to the * NAND device. The address is used to select the source/destination for * a NAND command. * * @param addr address to be written to NFC. * @param islast True if this is the last address cycle for command */ static void send_addr_v1_v2(struct imx_nand_host *host, u16 addr) { MTD_DEBUG(MTD_DEBUG_LEVEL3, "send_addr(host, 0x%x %d)\n", addr, islast); writew(addr, host->regs + NFC_V1_V2_FLASH_ADDR); writew(NFC_ADDR, host->regs + NFC_V1_V2_CONFIG2); /* Wait for operation to complete */ wait_op_done(host); } /* * This function requests the NANDFC to initate the transfer * of data currently in the NANDFC RAM buffer to the NAND device. * * @param buf_id Specify Internal RAM Buffer number (0-3) * @param spare_only set true if only the spare area is transferred */ static void send_page_v1_v2(struct imx_nand_host *host, unsigned int ops) { int bufs, i; if (nfc_is_v1() && host->pagesize_2k) bufs = 4; else bufs = 1; for (i = 0; i < bufs; i++) { /* NANDFC buffer 0 is used for page read/write */ writew(i, host->regs + NFC_V1_V2_BUF_ADDR); writew(ops, host->regs + NFC_V1_V2_CONFIG2); /* Wait for operation to complete */ wait_op_done(host); } } /* * This function requests the NANDFC to perform a read of the * NAND device ID. */ static void send_read_id_v1_v2(struct imx_nand_host *host) { struct nand_chip *this = &host->nand; /* NANDFC buffer 0 is used for device ID output */ writew(0x0, host->regs + NFC_V1_V2_BUF_ADDR); writew(NFC_ID, host->regs + NFC_V1_V2_CONFIG2); /* Wait for operation to complete */ wait_op_done(host); if (this->options & NAND_BUSWIDTH_16) { volatile u16 *mainbuf = host->main_area0; /* * Pack the every-other-byte result for 16-bit ID reads * into every-byte as the generic code expects and various * chips implement. */ mainbuf[0] = (mainbuf[0] & 0xff) | ((mainbuf[1] & 0xff) << 8); mainbuf[1] = (mainbuf[2] & 0xff) | ((mainbuf[3] & 0xff) << 8); mainbuf[2] = (mainbuf[4] & 0xff) | ((mainbuf[5] & 0xff) << 8); } memcpy32(host->data_buf, host->main_area0, 16); } /* * This function requests the NANDFC to perform a read of the * NAND device status and returns the current status. * * @return device status */ static u16 get_dev_status_v1_v2(struct imx_nand_host *host) { void *main_buf = host->main_area0; u32 store; u16 ret; writew(0x0, host->regs + NFC_V1_V2_BUF_ADDR); /* * The device status is stored in main_area0. To * prevent corruption of the buffer save the value * and restore it afterwards. */ store = readl(main_buf); writew(NFC_STATUS, host->regs + NFC_V1_V2_CONFIG2); /* Wait for operation to complete */ wait_op_done(host); /* Status is placed in first word of main buffer */ /* get status, then recovery area 1 data */ ret = readw(main_buf); writel(store, main_buf); return ret; } /* * This function is used by upper layer to checks if device is ready * * @param mtd MTD structure for the NAND Flash * * @return 0 if device is busy else 1 */ static int imx_nand_dev_ready(struct mtd_info *mtd) { /* * NFC handles R/B internally.Therefore,this function * always returns status as ready. */ return 1; } static void imx_nand_enable_hwecc(struct mtd_info *mtd, int mode) { /* * If HW ECC is enabled, we turn it on during init. There is * no need to enable again here. */ } static int imx_nand_correct_data(struct mtd_info *mtd, u_char * dat, u_char * read_ecc, u_char * calc_ecc) { struct nand_chip *nand_chip = mtd->priv; struct imx_nand_host *host = nand_chip->priv; /* * 1-Bit errors are automatically corrected in HW. No need for * additional correction. 2-Bit errors cannot be corrected by * HW ECC, so we need to return failure */ u16 ecc_status = readw(host->regs + NFC_V1_ECC_STATUS_RESULT); if (((ecc_status & 0x3) == 2) || ((ecc_status >> 2) == 2)) { MTD_DEBUG(MTD_DEBUG_LEVEL0, "MXC_NAND: HWECC uncorrectable 2-bit ECC error\n"); return -1; } return 0; } static int imx_nand_calculate_ecc(struct mtd_info *mtd, const u_char * dat, u_char * ecc_code) { return 0; } /* * This function reads byte from the NAND Flash * * @param mtd MTD structure for the NAND Flash * * @return data read from the NAND Flash */ static u_char imx_nand_read_byte(struct mtd_info *mtd) { struct nand_chip *nand_chip = mtd->priv; struct imx_nand_host *host = nand_chip->priv; u_char ret; /* Check for status request */ if (host->status_request) return host->get_dev_status(host) & 0xFF; ret = *(uint8_t *)(host->data_buf + host->buf_start); host->buf_start++; return ret; } /* * This function reads word from the NAND Flash * * @param mtd MTD structure for the NAND Flash * * @return data read from the NAND Flash */ static u16 imx_nand_read_word(struct mtd_info *mtd) { struct nand_chip *nand_chip = mtd->priv; struct imx_nand_host *host = nand_chip->priv; uint16_t ret; ret = *(uint16_t *)(host->data_buf + host->buf_start); host->buf_start += 2; return ret; } /* * This function writes data of length \b len to buffer \b buf. The data to be * written on NAND Flash is first copied to RAMbuffer. After the Data Input * Operation by the NFC, the data is written to NAND Flash * * @param mtd MTD structure for the NAND Flash * @param buf data to be written to NAND Flash * @param len number of bytes to be written */ static void imx_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len) { struct nand_chip *nand_chip = mtd->priv; struct imx_nand_host *host = nand_chip->priv; u16 col = host->buf_start; int n = mtd->oobsize + mtd->writesize - col; n = min(n, len); memcpy(host->data_buf + col, buf, n); host->buf_start += n; } /* * This function is used to read the data buffer from the NAND Flash. To * read the data from NAND Flash first the data output cycle is initiated by * the NFC, which copies the data to RAMbuffer. This data of length \b len is * then copied to buffer \b buf. * * @param mtd MTD structure for the NAND Flash * @param buf data to be read from NAND Flash * @param len number of bytes to be read */ static void imx_nand_read_buf(struct mtd_info *mtd, u_char * buf, int len) { struct nand_chip *nand_chip = mtd->priv; struct imx_nand_host *host = nand_chip->priv; u16 col = host->buf_start; int n = mtd->oobsize + mtd->writesize - col; n = min(n, len); memcpy(buf, host->data_buf + col, len); host->buf_start += len; } /* * Function to transfer data to/from spare area. */ static void copy_spare(struct mtd_info *mtd, int bfrom) { struct nand_chip *this = mtd->priv; struct imx_nand_host *host = this->priv; u16 i, j; u16 n = mtd->writesize >> 9; u8 *d = host->data_buf + mtd->writesize; u8 *s = host->spare0; u16 t = host->spare_len; j = (mtd->oobsize / n >> 1) << 1; if (bfrom) { for (i = 0; i < n - 1; i++) memcpy32(d + i * j, s + i * t, j); /* the last section */ memcpy32(d + i * j, s + i * t, mtd->oobsize - i * j); } else { for (i = 0; i < n - 1; i++) memcpy32(&s[i * t], &d[i * j], j); /* the last section */ memcpy32(&s[i * t], &d[i * j], mtd->oobsize - i * j); } } /* * This function is used by the upper layer to verify the data in NAND Flash * with the data in the \b buf. * * @param mtd MTD structure for the NAND Flash * @param buf data to be verified * @param len length of the data to be verified * * @return -EFAULT if error else 0 * */ static int imx_nand_verify_buf(struct mtd_info *mtd, const u_char * buf, int len) { return -EFAULT; } /* * This function is used by upper layer for select and deselect of the NAND * chip * * @param mtd MTD structure for the NAND Flash * @param chip val indicating select or deselect */ static void imx_nand_select_chip(struct mtd_info *mtd, int chip) { #ifdef CONFIG_MTD_NAND_MXC_FORCE_CE u16 tmp; if (chip > 0) { MTD_DEBUG(MTD_DEBUG_LEVEL0, "ERROR: Illegal chip select (chip = %d)\n", chip); return; } if (chip == -1) { tmp = readw(host->regs + NFC_CONFIG1); tmp &= ~NFC_CE; writew(tmp, host->regs + NFC_CONFIG1); return; } tmp = readw(host->regs + NFC_CONFIG1); tmp |= NFC_CE; writew(tmp, host->regs + NFC_CONFIG1); #endif } static void mxc_do_addr_cycle(struct mtd_info *mtd, int column, int page_addr) { struct nand_chip *nand_chip = mtd->priv; struct imx_nand_host *host = nand_chip->priv; /* * Write out column address, if necessary */ if (column != -1) { /* * MXC NANDFC can only perform full page+spare or * spare-only read/write. When the upper layers * layers perform a read/write buf operation, * we will used the saved column adress to index into * the full page. */ host->send_addr(host, 0); if (host->pagesize_2k) /* another col addr cycle for 2k page */ host->send_addr(host, 0); } /* * Write out page address, if necessary */ if (page_addr != -1) { host->send_addr(host, (page_addr & 0xff)); /* paddr_0 - p_addr_7 */ if (host->pagesize_2k) { host->send_addr(host, (page_addr >> 8) & 0xFF); if (mtd->size >= 0x10000000) { host->send_addr(host, (page_addr >> 16) & 0xff); } } else { /* One more address cycle for higher density devices */ if (mtd->size >= 0x4000000) { /* paddr_8 - paddr_15 */ host->send_addr(host, (page_addr >> 8) & 0xff); host->send_addr(host, (page_addr >> 16) & 0xff); } else /* paddr_8 - paddr_15 */ host->send_addr(host, (page_addr >> 8) & 0xff); } } } /* * This function is used by the upper layer to write command to NAND Flash for * different operations to be carried out on NAND Flash * * @param mtd MTD structure for the NAND Flash * @param command command for NAND Flash * @param column column offset for the page read * @param page_addr page to be read from NAND Flash */ static void imx_nand_command(struct mtd_info *mtd, unsigned command, int column, int page_addr) { struct nand_chip *nand_chip = mtd->priv; struct imx_nand_host *host = nand_chip->priv; MTD_DEBUG(MTD_DEBUG_LEVEL3, "imx_nand_command (cmd = 0x%x, col = 0x%x, page = 0x%x)\n", command, column, page_addr); /* * Reset command state information */ host->status_request = 0; /* * Command pre-processing step */ switch (command) { case NAND_CMD_STATUS: host->buf_start = 0; host->status_request = 1; host->send_cmd(host, command); mxc_do_addr_cycle(mtd, column, page_addr); break; case NAND_CMD_READ0: case NAND_CMD_READOOB: if (command == NAND_CMD_READ0) host->buf_start = column; else host->buf_start = column + mtd->writesize; command = NAND_CMD_READ0; host->send_cmd(host, command); mxc_do_addr_cycle(mtd, column, page_addr); if (host->pagesize_2k) /* send read confirm command */ host->send_cmd(host, NAND_CMD_READSTART); host->send_page(host, NFC_OUTPUT); memcpy32(host->data_buf, host->main_area0, mtd->writesize); copy_spare(mtd, 1); break; case NAND_CMD_SEQIN: if (column >= mtd->writesize) { if (host->pagesize_2k) { /** * FIXME: before send SEQIN command for write * OOB, we must read one page out. For K9F1GXX * has no READ1 command to set current HW * pointer to spare area, we must write the * whole page including OOB together. */ /* call ourself to read a page */ imx_nand_command(mtd, NAND_CMD_READ0, 0, page_addr); } host->buf_start = column; /* Set program pointer to spare region */ if (!host->pagesize_2k) host->send_cmd(host, NAND_CMD_READOOB); } else { host->buf_start = column; /* Set program pointer to page start */ if (!host->pagesize_2k) host->send_cmd(host, NAND_CMD_READ0); } host->send_cmd(host, command); mxc_do_addr_cycle(mtd, column, page_addr); break; case NAND_CMD_PAGEPROG: memcpy32(host->main_area0, host->data_buf, mtd->writesize); copy_spare(mtd, 0); host->send_page(host, NFC_INPUT); host->send_cmd(host, command); mxc_do_addr_cycle(mtd, column, page_addr); break; case NAND_CMD_READID: host->send_cmd(host, command); mxc_do_addr_cycle(mtd, column, page_addr); host->buf_start = 0; host->send_read_id(host); break; case NAND_CMD_ERASE1: case NAND_CMD_ERASE2: case NAND_CMD_RESET: host->send_cmd(host, command); mxc_do_addr_cycle(mtd, column, page_addr); break; } } #ifdef CONFIG_MXC_NAND_LOW_LEVEL_ERASE static void imx_low_erase(struct mtd_info *mtd) { struct nand_chip *this = mtd->priv; unsigned int page_addr, addr; u_char status; MTD_DEBUG(MTD_DEBUG_LEVEL0, "MXC_ND : imx_low_erase:Erasing NAND\n"); for (addr = 0; addr < this->chipsize; addr += mtd->erasesize) { page_addr = addr / mtd->writesize; imx_nand_command(mtd, NAND_CMD_ERASE1, -1, page_addr); imx_nand_command(mtd, NAND_CMD_ERASE2, -1, -1); imx_nand_command(mtd, NAND_CMD_STATUS, -1, -1); status = imx_nand_read_byte(mtd); if (status & NAND_STATUS_FAIL) { printk(KERN_ERR "ERASE FAILED(block = %d,status = 0x%x)\n", addr / mtd->erasesize, status); } } } #endif /* * The generic flash bbt decriptors overlap with our ecc * hardware, so define some i.MX specific ones. */ static uint8_t bbt_pattern[] = { 'B', 'b', 't', '0' }; static uint8_t mirror_pattern[] = { '1', 't', 'b', 'B' }; static struct nand_bbt_descr bbt_main_descr = { .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP, .offs = 0, .len = 4, .veroffs = 4, .maxblocks = 4, .pattern = bbt_pattern, }; static struct nand_bbt_descr bbt_mirror_descr = { .options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE | NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP, .offs = 0, .len = 4, .veroffs = 4, .maxblocks = 4, .pattern = mirror_pattern, }; /* * This function is called during the driver binding process. * * @param pdev the device structure used to store device specific * information that is used by the suspend, resume and * remove functions * * @return The function always returns 0. */ static int __init imxnd_probe(struct device_d *dev) { struct nand_chip *this; struct mtd_info *mtd; struct imx_nand_platform_data *pdata = dev->platform_data; struct imx_nand_host *host; struct nand_ecclayout *oob_smallpage, *oob_largepage; u16 tmp; int err = 0; #ifdef CONFIG_ARCH_IMX27 PCCR1 |= PCCR1_NFC_BAUDEN; #endif #ifdef CONFIG_ARCH_IMX21 PCCR0 |= PCCR0_NFC_EN; #endif /* Allocate memory for MTD device structure and private data */ host = kzalloc(sizeof(struct imx_nand_host) + NAND_MAX_PAGESIZE + NAND_MAX_OOBSIZE, GFP_KERNEL); if (!host) return -ENOMEM; host->data_buf = (uint8_t *)(host + 1); host->base = (void __iomem *)dev->map_base; host->main_area0 = host->base; if (nfc_is_v1() || nfc_is_v21()) { host->send_cmd = send_cmd_v1_v2; host->send_addr = send_addr_v1_v2; host->send_page = send_page_v1_v2; host->send_read_id = send_read_id_v1_v2; host->get_dev_status = get_dev_status_v1_v2; } if (nfc_is_v21()) { host->regs = host->base + 0x1e00; 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 + 0xe00; host->spare0 = host->base + 0x800; host->spare_len = 16; oob_smallpage = &nandv1_hw_eccoob_smallpage; oob_largepage = &nandv1_hw_eccoob_largepage; } host->dev = dev; /* structures must be linked */ this = &host->nand; mtd = &host->mtd; mtd->priv = this; /* 50 us command delay time */ this->chip_delay = 5; this->priv = host; this->dev_ready = imx_nand_dev_ready; this->cmdfunc = imx_nand_command; this->select_chip = imx_nand_select_chip; this->read_byte = imx_nand_read_byte; this->read_word = imx_nand_read_word; this->write_buf = imx_nand_write_buf; this->read_buf = imx_nand_read_buf; this->verify_buf = imx_nand_verify_buf; #if 0 host->clk = clk_get(&pdev->dev, "nfc_clk"); if (IS_ERR(host->clk)) goto eclk; clk_enable(host->clk); #endif tmp = readw(host->regs + NFC_V1_V2_CONFIG1); tmp |= NFC_V1_V2_CONFIG1_INT_MSK; tmp &= ~NFC_V1_V2_CONFIG1_SP_EN; if (nfc_is_v21()) /* currently no support for 218 byte OOB with stronger ECC */ tmp |= NFC_V2_CONFIG1_ECC_MODE_4; writew(tmp, host->regs + NFC_V1_V2_CONFIG1); if (pdata->hw_ecc) { this->ecc.calculate = imx_nand_calculate_ecc; this->ecc.hwctl = imx_nand_enable_hwecc; this->ecc.correct = imx_nand_correct_data; this->ecc.mode = NAND_ECC_HW; this->ecc.size = 512; tmp = readw(host->regs + NFC_V1_V2_CONFIG1); tmp |= NFC_V1_V2_CONFIG1_ECC_EN; writew(tmp, host->regs + NFC_V1_V2_CONFIG1); } else { this->ecc.size = 512; this->ecc.mode = NAND_ECC_SOFT; tmp = readw(host->regs + NFC_V1_V2_CONFIG1); tmp &= ~NFC_V1_V2_CONFIG1_ECC_EN; writew(tmp, host->regs + NFC_V1_V2_CONFIG1); } /* Reset NAND */ this->cmdfunc(mtd, NAND_CMD_RESET, -1, -1); /* preset operation */ /* Unlock the internal RAM Buffer */ writew(0x2, host->regs + NFC_V1_V2_CONFIG); /* Blocks to be unlocked */ 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; } /* Unlock Block Command for given address range */ writew(0x4, host->regs + NFC_V1_V2_WRPROT); this->ecc.layout = oob_smallpage; /* NAND bus width determines access funtions used by upper layer */ if (pdata->width == 2) { this->options |= NAND_BUSWIDTH_16; this->ecc.layout = &nandv1_hw_eccoob_smallpage; imx_nand_set_layout(0, 16); } if (pdata->flash_bbt) { this->bbt_td = &bbt_main_descr; this->bbt_md = &bbt_mirror_descr; /* update flash based bbt */ this->options |= NAND_USE_FLASH_BBT; } /* first scan to find the device and get the page size */ if (nand_scan_ident(mtd, 1)) { err = -ENXIO; goto escan; } imx_nand_set_layout(mtd->writesize, pdata->width == 2 ? 16 : 8); if (mtd->writesize == 2048) { this->ecc.layout = oob_largepage; host->pagesize_2k = 1; if (nfc_is_v21()) writew(NFC_V2_SPAS_SPARESIZE(64), host->regs + NFC_V2_SPAS); } else { if (nfc_is_v21()) writew(NFC_V2_SPAS_SPARESIZE(16), host->regs + NFC_V2_SPAS); } /* second phase scan */ if (nand_scan_tail(mtd)) { err = -ENXIO; goto escan; } add_mtd_device(mtd); dev->priv = host; return 0; escan: kfree(host); return err; } static struct driver_d imx_nand_driver = { .name = "imx_nand", .probe = imxnd_probe, }; #ifdef CONFIG_NAND_IMX_BOOT static void __nand_boot_init noinline imx_nandboot_wait_op_done(void *regs) { u32 r; while (1) { r = readw(regs + NFC_V1_V2_CONFIG2); if (r & NFC_V1_V2_CONFIG2_INT) break; }; r &= ~NFC_V1_V2_CONFIG2_INT; writew(r, regs + NFC_V1_V2_CONFIG2); } /* * This function issues the specified command to the NAND device and * waits for completion. * * @param cmd command for NAND Flash */ static void __nand_boot_init imx_nandboot_send_cmd(void *regs, u16 cmd) { writew(cmd, regs + NFC_V1_V2_FLASH_CMD); writew(NFC_CMD, regs + NFC_V1_V2_CONFIG2); imx_nandboot_wait_op_done(regs); } /* * This function sends an address (or partial address) to the * NAND device. The address is used to select the source/destination for * a NAND command. * * @param addr address to be written to NFC. * @param islast True if this is the last address cycle for command */ static void __nand_boot_init noinline imx_nandboot_send_addr(void *regs, u16 addr) { writew(addr, regs + NFC_V1_V2_FLASH_ADDR); writew(NFC_ADDR, regs + NFC_V1_V2_CONFIG2); /* Wait for operation to complete */ imx_nandboot_wait_op_done(regs); } static void __nand_boot_init imx_nandboot_nfc_addr(void *regs, u32 offs, int pagesize_2k) { imx_nandboot_send_addr(regs, offs & 0xff); if (pagesize_2k) { imx_nandboot_send_addr(regs, offs & 0xff); imx_nandboot_send_addr(regs, (offs >> 11) & 0xff); imx_nandboot_send_addr(regs, (offs >> 19) & 0xff); imx_nandboot_send_addr(regs, (offs >> 27) & 0xff); imx_nandboot_send_cmd(regs, NAND_CMD_READSTART); } else { imx_nandboot_send_addr(regs, (offs >> 9) & 0xff); imx_nandboot_send_addr(regs, (offs >> 17) & 0xff); imx_nandboot_send_addr(regs, (offs >> 25) & 0xff); } } static void __nand_boot_init imx_nandboot_send_page(void *regs, unsigned int ops, int pagesize_2k) { int bufs, i; if (nfc_is_v1() && pagesize_2k) bufs = 4; else bufs = 1; for (i = 0; i < bufs; i++) { /* NANDFC buffer 0 is used for page read/write */ writew(i, regs + NFC_V1_V2_BUF_ADDR); writew(ops, regs + NFC_V1_V2_CONFIG2); /* Wait for operation to complete */ imx_nandboot_wait_op_done(regs); } } static void __nand_boot_init __memcpy32(void *trg, const void *src, int size) { int i; unsigned int *t = trg; unsigned const int *s = src; for (i = 0; i < (size >> 2); i++) *t++ = *s++; } static int __maybe_unused is_pagesize_2k(void) { #ifdef CONFIG_ARCH_IMX21 if (readl(IMX_SYSTEM_CTL_BASE + 0x14) & (1 << 5)) return 1; else return 0; #endif #ifdef CONFIG_ARCH_IMX27 if (readl(IMX_SYSTEM_CTL_BASE + 0x14) & (1 << 5)) return 1; else return 0; #endif #ifdef CONFIG_ARCH_IMX31 if (readl(IMX_CCM_BASE + CCM_RCSR) & RCSR_NFMS) return 1; else return 0; #endif #if defined(CONFIG_ARCH_IMX35) || defined(CONFIG_ARCH_IMX25) if (readl(IMX_CCM_BASE + CCM_RCSR) & (1 << 8)) return 1; else return 0; #endif } void __nand_boot_init imx_nand_load_image(void *dest, int size) { u32 tmp, page, block, blocksize, pagesize; int pagesize_2k = 1; void *regs, *base, *spare0; #if defined(CONFIG_NAND_IMX_BOOT_512) pagesize_2k = 0; #elif defined(CONFIG_NAND_IMX_BOOT_2K) pagesize_2k = 1; #else pagesize_2k = is_pagesize_2k(); #endif if (pagesize_2k) { pagesize = 2048; blocksize = 128 * 1024; } else { pagesize = 512; blocksize = 16 * 1024; } base = (void __iomem *)IMX_NFC_BASE; if (nfc_is_v21()) { regs = base + 0x1e00; spare0 = base + 0x1000; } else if (nfc_is_v1()) { regs = base + 0xe00; spare0 = base + 0x800; } imx_nandboot_send_cmd(regs, NAND_CMD_RESET); /* preset operation */ /* Unlock the internal RAM Buffer */ writew(0x2, regs + NFC_V1_V2_CONFIG); /* Unlock Block Command for given address range */ writew(0x4, regs + NFC_V1_V2_WRPROT); tmp = readw(regs + NFC_V1_V2_CONFIG1); tmp |= NFC_V1_V2_CONFIG1_ECC_EN; if (nfc_is_v21()) /* currently no support for 218 byte OOB with stronger ECC */ tmp |= NFC_V2_CONFIG1_ECC_MODE_4; tmp &= ~(NFC_V1_V2_CONFIG1_SP_EN | NFC_V1_V2_CONFIG1_INT_MSK); writew(tmp, regs + NFC_V1_V2_CONFIG1); if (nfc_is_v21()) { if (pagesize_2k) writew(NFC_V2_SPAS_SPARESIZE(64), regs + NFC_V2_SPAS); else writew(NFC_V2_SPAS_SPARESIZE(16), regs + NFC_V2_SPAS); } block = page = 0; while (1) { page = 0; while (page * pagesize < blocksize) { debug("page: %d block: %d dest: %p src " "0x%08x\n", page, block, dest, block * blocksize + page * pagesize); imx_nandboot_send_cmd(regs, NAND_CMD_READ0); imx_nandboot_nfc_addr(regs, block * blocksize + page * pagesize, pagesize_2k); imx_nandboot_send_page(regs, NFC_OUTPUT, pagesize_2k); page++; if (pagesize_2k) { if ((readw(spare0) & 0xff) != 0xff) continue; } else { if ((readw(spare0 + 4) & 0xff00) != 0xff00) continue; } __memcpy32(dest, base, pagesize); dest += pagesize; size -= pagesize; if (size <= 0) return; } block++; } } #define CONFIG_NAND_IMX_BOOT_DEBUG #ifdef CONFIG_NAND_IMX_BOOT_DEBUG #include static int do_nand_boot_test(struct command *cmdtp, int argc, char *argv[]) { void *dest; int size; if (argc < 3) return COMMAND_ERROR_USAGE; dest = (void *)strtoul_suffix(argv[1], NULL, 0); size = strtoul_suffix(argv[2], NULL, 0); imx_nand_load_image(dest, size); return 0; } static const __maybe_unused char cmd_nand_boot_test_help[] = "Usage: nand_boot_test \n" "This command loads the booloader from the NAND memory like the reset\n" "routine does. Its intended for development tests only"; BAREBOX_CMD_START(nand_boot_test) .cmd = do_nand_boot_test, .usage = "load bootloader from NAND", BAREBOX_CMD_HELP(cmd_nand_boot_test_help) BAREBOX_CMD_END #endif #endif /* CONFIG_NAND_IMX_BOOT */ /* * Main initialization routine * @return 0 if successful; non-zero otherwise */ static int __init imx_nand_init(void) { return register_driver(&imx_nand_driver); } device_initcall(imx_nand_init); MODULE_AUTHOR("Freescale Semiconductor, Inc."); MODULE_DESCRIPTION("MXC NAND MTD driver"); MODULE_LICENSE("GPL");