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->devnum;
  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 = blk_select_hwpart_devnum(IF_TYPE_MMC, dev_num,
  82                                        block_dev->hwpart);
  83         if (err < 0)
  84                 return -1;
  85
  86         /*
  87          * We want to see if the requested start or total block count are
  88          * unaligned.  We discard the whole numbers and only care about the
  89          * remainder.
  90          */
  91         err = div_u64_rem(start, mmc->erase_grp_size, &start_rem);
  92         err = div_u64_rem(blkcnt, mmc->erase_grp_size, &blkcnt_rem);
  93         if (start_rem || blkcnt_rem)
  94                 printf("\n\nCaution! Your devices Erase group is 0x%x\n"
  95                        "The erase range would be change to "
  96                        "0x" LBAF "~0x" LBAF "\n\n",
  97                        mmc->erase_grp_size, start & ~(mmc->erase_grp_size - 1),
  98                        ((start + blkcnt + mmc->erase_grp_size)
  99                        & ~(mmc->erase_grp_size - 1)) - 1);
 100
 101         while (blk < blkcnt) {
 102                 blk_r = ((blkcnt - blk) > mmc->erase_grp_size) ?
 103                         mmc->erase_grp_size : (blkcnt - blk);
 104                 err = mmc_erase_t(mmc, start + blk, blk_r);
 105                 if (err)
 106                         break;
 107
 108                 blk += blk_r;
 109
 110                 /* Waiting for the ready status */
 111                 if (mmc_send_status(mmc, timeout))
 112                         return 0;
 113         }
 114
 115         return blk;
 116 }
 117
 118 static ulong mmc_write_blocks(struct mmc *mmc, lbaint_t start,
 119                 lbaint_t blkcnt, const void *src)
 120 {
 121         struct mmc_cmd cmd;
 122         struct mmc_data data;
 123         int timeout = 1000;
 124
 125         if ((start + blkcnt) > mmc_get_blk_desc(mmc)->lba) {
 126                 printf("MMC: block number 0x" LBAF " exceeds max(0x" LBAF ")\n",
 127                        start + blkcnt, mmc_get_blk_desc(mmc)->lba);
 128                 return 0;
 129         }
 130
 131         if (blkcnt == 0)
 132                 return 0;
 133         else if (blkcnt == 1)
 134                 cmd.cmdidx = MMC_CMD_WRITE_SINGLE_BLOCK;
 135         else
 136                 cmd.cmdidx = MMC_CMD_WRITE_MULTIPLE_BLOCK;
 137
 138         if (mmc->high_capacity)
 139                 cmd.cmdarg = start;
 140         else
 141                 cmd.cmdarg = start * mmc->write_bl_len;
 142
 143         cmd.resp_type = MMC_RSP_R1;
 144
 145         data.src = src;
 146         data.blocks = blkcnt;
 147         data.blocksize = mmc->write_bl_len;
 148         data.flags = MMC_DATA_WRITE;
 149
 150         if (mmc_send_cmd(mmc, &cmd, &data)) {
 151                 printf("mmc write failed\n");
 152                 return 0;
 153         }
 154
 155         /* SPI multiblock writes terminate using a special
 156          * token, not a STOP_TRANSMISSION request.
 157          */
 158         if (!mmc_host_is_spi(mmc) && blkcnt > 1) {
 159                 cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
 160                 cmd.cmdarg = 0;
 161                 cmd.resp_type = MMC_RSP_R1b;
 162                 if (mmc_send_cmd(mmc, &cmd, NULL)) {
 163                         printf("mmc fail to send stop cmd\n");
 164                         return 0;
 165                 }
 166         }
 167
 168         /* Waiting for the ready status */
 169         if (mmc_send_status(mmc, timeout))
 170                 return 0;
 171
 172         return blkcnt;
 173 }
 174
 175 ulong mmc_bwrite(struct blk_desc *block_dev, lbaint_t start, lbaint_t blkcnt,
 176                  const void *src)
 177 {
 178         int dev_num = block_dev->devnum;
 179         lbaint_t cur, blocks_todo = blkcnt;
 180         int err;
 181
 182         struct mmc *mmc = find_mmc_device(dev_num);
 183         if (!mmc)
 184                 return 0;
 185
 186         err = blk_select_hwpart_devnum(IF_TYPE_MMC, dev_num, block_dev->hwpart);
 187         if (err < 0)
 188                 return 0;
 189
 190         if (mmc_set_blocklen(mmc, mmc->write_bl_len))
 191                 return 0;
 192
 193         do {
 194                 cur = (blocks_todo > mmc->cfg->b_max) ?
 195                         mmc->cfg->b_max : blocks_todo;
 196                 if (mmc_write_blocks(mmc, start, cur, src) != cur)
 197                         return 0;
 198                 blocks_todo -= cur;
 199                 start += cur;
 200                 src += cur * mmc->write_bl_len;
 201         } while (blocks_todo > 0);
 202
 203         return blkcnt;
 204 }