drivers/mmc/mmc_write.c

   1 /*
   2  * Copyright 2008, Freescale Semiconductor, Inc
   3  * Andy Fleming
   4  *
   5  * Based vaguely on the Linux code
   6  *
   7  * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9
  10 #include <config.h>
  11 #include <common.h>
  12 #include <part.h>
  13 #include <div64.h>
  14 #include <linux/math64.h>
  15 #include "mmc_private.h"
  16
  17 static ulong mmc_erase_t(struct mmc *mmc, ulong start, lbaint_t blkcnt)
  18 {
  19         struct mmc_cmd cmd;
  20         ulong end;
  21         int err, start_cmd, end_cmd;
  22
  23         if (mmc->high_capacity) {
  24                 end = start + blkcnt - 1;
  25         } else {
  26                 end = (start + blkcnt - 1) * mmc->write_bl_len;
  27                 start *= mmc->write_bl_len;
  28         }
  29
  30         if (IS_SD(mmc)) {
  31                 start_cmd = SD_CMD_ERASE_WR_BLK_START;
  32                 end_cmd = SD_CMD_ERASE_WR_BLK_END;
  33         } else {
  34                 start_cmd = MMC_CMD_ERASE_GROUP_START;
  35                 end_cmd = MMC_CMD_ERASE_GROUP_END;
  36         }
  37
  38         cmd.cmdidx = start_cmd;
  39         cmd.cmdarg = start;
  40         cmd.resp_type = MMC_RSP_R1;
  41
  42         err = mmc_send_cmd(mmc, &cmd, NULL);
  43         if (err)
  44                 goto err_out;
  45
  46         cmd.cmdidx = end_cmd;
  47         cmd.cmdarg = end;
  48
  49         err = mmc_send_cmd(mmc, &cmd, NULL);
  50         if (err)
  51                 goto err_out;
  52
  53         cmd.cmdidx = MMC_CMD_ERASE;
  54         cmd.cmdarg = MMC_ERASE_ARG;
  55         cmd.resp_type = MMC_RSP_R1b;
  56
  57         err = mmc_send_cmd(mmc, &cmd, NULL);
  58         if (err)
  59                 goto err_out;
  60
  61         return 0;
  62
  63 err_out:
  64         puts("mmc erase failed\n");
  65         return err;
  66 }
  67
  68 unsigned long mmc_berase(struct blk_desc *block_dev, lbaint_t start,
  69                          lbaint_t blkcnt)
  70 {
  71         int dev_num = block_dev->dev;
  72         int err = 0;
  73         u32 start_rem, blkcnt_rem;
  74         struct mmc *mmc = find_mmc_device(dev_num);
  75         lbaint_t blk = 0, blk_r = 0;
  76         int timeout = 1000;
  77
  78         if (!mmc)
  79                 return -1;
  80
  81         err = mmc_select_hwpart(dev_num, block_dev->hwpart);
  82         if (err < 0)
  83                 return -1;
  84
  85         /*
  86          * We want to see if the requested start or total block count are
  87          * unaligned.  We discard the whole numbers and only care about the
  88          * remainder.
  89          */
  90         err = div_u64_rem(start, mmc->erase_grp_size, &start_rem);
  91         err = div_u64_rem(blkcnt, mmc->erase_grp_size, &blkcnt_rem);
  92         if (start_rem || blkcnt_rem)
  93                 printf("\n\nCaution! Your devices Erase group is 0x%x\n"
  94                        "The erase range would be change to "
  95                        "0x" LBAF "~0x" LBAF "\n\n",
  96                        mmc->erase_grp_size, start & ~(mmc->erase_grp_size - 1),
  97                        ((start + blkcnt + mmc->erase_grp_size)
  98                        & ~(mmc->erase_grp_size - 1)) - 1);
  99
 100         while (blk < blkcnt) {
 101                 blk_r = ((blkcnt - blk) > mmc->erase_grp_size) ?
 102                         mmc->erase_grp_size : (blkcnt - blk);
 103                 err = mmc_erase_t(mmc, start + blk, blk_r);
 104                 if (err)
 105                         break;
 106
 107                 blk += blk_r;
 108
 109                 /* Waiting for the ready status */
 110                 if (mmc_send_status(mmc, timeout))
 111                         return 0;
 112         }
 113
 114         return blk;
 115 }
 116
 117 static ulong mmc_write_blocks(struct mmc *mmc, lbaint_t start,
 118                 lbaint_t blkcnt, const void *src)
 119 {
 120         struct mmc_cmd cmd;
 121         struct mmc_data data;
 122         int timeout = 1000;
 123
 124         if ((start + blkcnt) > mmc->block_dev.lba) {
 125                 printf("MMC: block number 0x" LBAF " exceeds max(0x" LBAF ")\n",
 126                        start + blkcnt, mmc->block_dev.lba);
 127                 return 0;
 128         }
 129
 130         if (blkcnt == 0)
 131                 return 0;
 132         else if (blkcnt == 1)
 133                 cmd.cmdidx = MMC_CMD_WRITE_SINGLE_BLOCK;
 134         else
 135                 cmd.cmdidx = MMC_CMD_WRITE_MULTIPLE_BLOCK;
 136
 137         if (mmc->high_capacity)
 138                 cmd.cmdarg = start;
 139         else
 140                 cmd.cmdarg = start * mmc->write_bl_len;
 141
 142         cmd.resp_type = MMC_RSP_R1;
 143
 144         data.src = src;
 145         data.blocks = blkcnt;
 146         data.blocksize = mmc->write_bl_len;
 147         data.flags = MMC_DATA_WRITE;
 148
 149         if (mmc_send_cmd(mmc, &cmd, &data)) {
 150                 printf("mmc write failed\n");
 151                 return 0;
 152         }
 153
 154         /* SPI multiblock writes terminate using a special
 155          * token, not a STOP_TRANSMISSION request.
 156          */
 157         if (!mmc_host_is_spi(mmc) && blkcnt > 1) {
 158                 cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
 159                 cmd.cmdarg = 0;
 160                 cmd.resp_type = MMC_RSP_R1b;
 161                 if (mmc_send_cmd(mmc, &cmd, NULL)) {
 162                         printf("mmc fail to send stop cmd\n");
 163                         return 0;
 164                 }
 165         }
 166
 167         /* Waiting for the ready status */
 168         if (mmc_send_status(mmc, timeout))
 169                 return 0;
 170
 171         return blkcnt;
 172 }
 173
 174 ulong mmc_bwrite(struct blk_desc *block_dev, lbaint_t start, lbaint_t blkcnt,
 175                  const void *src)
 176 {
 177         int dev_num = block_dev->dev;
 178         lbaint_t cur, blocks_todo = blkcnt;
 179         int err;
 180
 181         struct mmc *mmc = find_mmc_device(dev_num);
 182         if (!mmc)
 183                 return 0;
 184
 185         err = mmc_select_hwpart(dev_num, block_dev->hwpart);
 186         if (err < 0)
 187                 return 0;
 188
 189         if (mmc_set_blocklen(mmc, mmc->write_bl_len))
 190                 return 0;
 191
 192         do {
 193                 cur = (blocks_todo > mmc->cfg->b_max) ?
 194                         mmc->cfg->b_max : blocks_todo;
 195                 if (mmc_write_blocks(mmc, start, cur, src) != cur)
 196                         return 0;
 197                 blocks_todo -= cur;
 198                 start += cur;
 199                 src += cur * mmc->write_bl_len;
 200         } while (blocks_todo > 0);
 201
 202         return blkcnt;
 203 }