git.sur5r.net Git - u-boot/blob - drivers/mtd/nand/mxs_nand_spl.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2014 Gateworks Corporation
   4  * Author: Tim Harvey <tharvey@gateworks.com>
   5  */
   6 #include <common.h>
   7 #include <nand.h>
   8 #include <malloc.h>
   9 #include "mxs_nand.h"
  10
  11 static struct mtd_info *mtd;
  12 static struct nand_chip nand_chip;
  13
  14 static void mxs_nand_command(struct mtd_info *mtd, unsigned int command,
  15                              int column, int page_addr)
  16 {
  17         register struct nand_chip *chip = mtd_to_nand(mtd);
  18         u32 timeo, time_start;
  19
  20         /* write out the command to the device */
  21         chip->cmd_ctrl(mtd, command, NAND_CLE);
  22
  23         /* Serially input address */
  24         if (column != -1) {
  25                 chip->cmd_ctrl(mtd, column, NAND_ALE);
  26                 chip->cmd_ctrl(mtd, column >> 8, NAND_ALE);
  27         }
  28         if (page_addr != -1) {
  29                 chip->cmd_ctrl(mtd, page_addr, NAND_ALE);
  30                 chip->cmd_ctrl(mtd, page_addr >> 8, NAND_ALE);
  31                 /* One more address cycle for devices > 128MiB */
  32                 if (chip->chipsize > (128 << 20))
  33                         chip->cmd_ctrl(mtd, page_addr >> 16, NAND_ALE);
  34         }
  35         chip->cmd_ctrl(mtd, NAND_CMD_NONE, 0);
  36
  37         if (command == NAND_CMD_READ0) {
  38                 chip->cmd_ctrl(mtd, NAND_CMD_READSTART, NAND_CLE);
  39                 chip->cmd_ctrl(mtd, NAND_CMD_NONE, 0);
  40         }
  41
  42         /* wait for nand ready */
  43         ndelay(100);
  44         timeo = (CONFIG_SYS_HZ * 20) / 1000;
  45         time_start = get_timer(0);
  46         while (get_timer(time_start) < timeo) {
  47                 if (chip->dev_ready(mtd))
  48                         break;
  49         }
  50 }
  51
  52 #if defined (CONFIG_SPL_NAND_IDENT)
  53
  54 /* Trying to detect the NAND flash using ONFi, JEDEC, and (extended) IDs */
  55 static int mxs_flash_full_ident(struct mtd_info *mtd)
  56 {
  57         int nand_maf_id, nand_dev_id;
  58         struct nand_chip *chip = mtd_to_nand(mtd);
  59         struct nand_flash_dev *type;
  60
  61         type = nand_get_flash_type(mtd, chip, &nand_maf_id, &nand_dev_id, NULL);
  62
  63         if (IS_ERR(type)) {
  64                 chip->select_chip(mtd, -1);
  65                 return PTR_ERR(type);
  66         }
  67
  68         return 0;
  69 }
  70
  71 #else
  72
  73 /* Trying to detect the NAND flash using ONFi only */
  74 static int mxs_flash_onfi_ident(struct mtd_info *mtd)
  75 {
  76         register struct nand_chip *chip = mtd_to_nand(mtd);
  77         int i;
  78         u8 mfg_id, dev_id;
  79         u8 id_data[8];
  80         struct nand_onfi_params *p = &chip->onfi_params;
  81
  82         /* Reset the chip */
  83         chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
  84
  85         /* Send the command for reading device ID */
  86         chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);
  87
  88         /* Read manufacturer and device IDs */
  89         mfg_id = chip->read_byte(mtd);
  90         dev_id = chip->read_byte(mtd);
  91
  92         /* Try again to make sure */
  93         chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);
  94         for (i = 0; i < 8; i++)
  95                 id_data[i] = chip->read_byte(mtd);
  96         if (id_data[0] != mfg_id || id_data[1] != dev_id) {
  97                 printf("second ID read did not match");
  98                 return -1;
  99         }
 100         debug("0x%02x:0x%02x ", mfg_id, dev_id);
 101
 102         /* read ONFI */
 103         chip->onfi_version = 0;
 104         chip->cmdfunc(mtd, NAND_CMD_READID, 0x20, -1);
 105         if (chip->read_byte(mtd) != 'O' || chip->read_byte(mtd) != 'N' ||
 106             chip->read_byte(mtd) != 'F' || chip->read_byte(mtd) != 'I') {
 107                 return -2;
 108         }
 109
 110         /* we have ONFI, probe it */
 111         chip->cmdfunc(mtd, NAND_CMD_PARAM, 0, -1);
 112         chip->read_buf(mtd, (uint8_t *)p, sizeof(*p));
 113         mtd->name = p->model;
 114         mtd->writesize = le32_to_cpu(p->byte_per_page);
 115         mtd->erasesize = le32_to_cpu(p->pages_per_block) * mtd->writesize;
 116         mtd->oobsize = le16_to_cpu(p->spare_bytes_per_page);
 117         chip->chipsize = le32_to_cpu(p->blocks_per_lun);
 118         chip->chipsize *= (uint64_t)mtd->erasesize * p->lun_count;
 119         /* Calculate the address shift from the page size */
 120         chip->page_shift = ffs(mtd->writesize) - 1;
 121         chip->phys_erase_shift = ffs(mtd->erasesize) - 1;
 122         /* Convert chipsize to number of pages per chip -1 */
 123         chip->pagemask = (chip->chipsize >> chip->page_shift) - 1;
 124         chip->badblockbits = 8;
 125
 126         debug("erasesize=%d (>>%d)\n", mtd->erasesize, chip->phys_erase_shift);
 127         debug("writesize=%d (>>%d)\n", mtd->writesize, chip->page_shift);
 128         debug("oobsize=%d\n", mtd->oobsize);
 129         debug("chipsize=%lld\n", chip->chipsize);
 130
 131         return 0;
 132 }
 133
 134 #endif /* CONFIG_SPL_NAND_IDENT */
 135
 136 static int mxs_flash_ident(struct mtd_info *mtd)
 137 {
 138         int ret;
 139 #if defined (CONFIG_SPL_NAND_IDENT)
 140         ret = mxs_flash_full_ident(mtd);
 141 #else
 142         ret = mxs_flash_onfi_ident(mtd);
 143 #endif
 144         return ret;
 145 }
 146
 147 static int mxs_read_page_ecc(struct mtd_info *mtd, void *buf, unsigned int page)
 148 {
 149         register struct nand_chip *chip = mtd_to_nand(mtd);
 150         int ret;
 151
 152         chip->cmdfunc(mtd, NAND_CMD_READ0, 0x0, page);
 153         ret = nand_chip.ecc.read_page(mtd, chip, buf, 1, page);
 154         if (ret < 0) {
 155                 printf("read_page failed %d\n", ret);
 156                 return -1;
 157         }
 158         return 0;
 159 }
 160
 161 static int is_badblock(struct mtd_info *mtd, loff_t offs, int allowbbt)
 162 {
 163         register struct nand_chip *chip = mtd_to_nand(mtd);
 164         unsigned int block = offs >> chip->phys_erase_shift;
 165         unsigned int page = offs >> chip->page_shift;
 166
 167         debug("%s offs=0x%08x block:%d page:%d\n", __func__, (int)offs, block,
 168               page);
 169         chip->cmdfunc(mtd, NAND_CMD_READ0, mtd->writesize, page);
 170         memset(chip->oob_poi, 0, mtd->oobsize);
 171         chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
 172
 173         return chip->oob_poi[0] != 0xff;
 174 }
 175
 176 /* setup mtd and nand structs and init mxs_nand driver */
 177 static int mxs_nand_init(void)
 178 {
 179         /* return if already initalized */
 180         if (nand_chip.numchips)
 181                 return 0;
 182
 183         /* init mxs nand driver */
 184         mxs_nand_init_spl(&nand_chip);
 185         mtd = nand_to_mtd(&nand_chip);
 186         /* set mtd functions */
 187         nand_chip.cmdfunc = mxs_nand_command;
 188         nand_chip.numchips = 1;
 189
 190         /* identify flash device */
 191         if (mxs_flash_ident(mtd)) {
 192                 printf("Failed to identify\n");
 193                 return -1;
 194         }
 195
 196         /* allocate and initialize buffers */
 197         nand_chip.buffers = memalign(ARCH_DMA_MINALIGN,
 198                                      sizeof(*nand_chip.buffers));
 199         nand_chip.oob_poi = nand_chip.buffers->databuf + mtd->writesize;
 200         /* setup flash layout (does not scan as we override that) */
 201         mtd->size = nand_chip.chipsize;
 202         nand_chip.scan_bbt(mtd);
 203
 204         return 0;
 205 }
 206
 207 int nand_spl_load_image(uint32_t offs, unsigned int size, void *buf)
 208 {
 209         struct nand_chip *chip;
 210         unsigned int page;
 211         unsigned int nand_page_per_block;
 212         unsigned int sz = 0;
 213
 214         if (mxs_nand_init())
 215                 return -ENODEV;
 216         chip = mtd_to_nand(mtd);
 217         page = offs >> chip->page_shift;
 218         nand_page_per_block = mtd->erasesize / mtd->writesize;
 219
 220         debug("%s offset:0x%08x len:%d page:%d\n", __func__, offs, size, page);
 221
 222         size = roundup(size, mtd->writesize);
 223         while (sz < size) {
 224                 if (mxs_read_page_ecc(mtd, buf, page) < 0)
 225                         return -1;
 226                 sz += mtd->writesize;
 227                 offs += mtd->writesize;
 228                 page++;
 229                 buf += mtd->writesize;
 230
 231                 /*
 232                  * Check if we have crossed a block boundary, and if so
 233                  * check for bad block.
 234                  */
 235                 if (!(page % nand_page_per_block)) {
 236                         /*
 237                          * Yes, new block. See if this block is good. If not,
 238                          * loop until we find a good block.
 239                          */
 240                         while (is_badblock(mtd, offs, 1)) {
 241                                 page = page + nand_page_per_block;
 242                                 /* Check i we've reached the end of flash. */
 243                                 if (page >= mtd->size >> chip->page_shift)
 244                                         return -ENOMEM;
 245                         }
 246                 }
 247         }
 248
 249         return 0;
 250 }
 251
 252 int nand_default_bbt(struct mtd_info *mtd)
 253 {
 254         return 0;
 255 }
 256
 257 void nand_init(void)
 258 {
 259 }
 260
 261 void nand_deselect(void)
 262 {
 263 }
 264