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 = SECURE_ERASE;
  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(int dev_num, lbaint_t start, lbaint_t blkcnt)
  69 {
  70         int err = 0;
  71         u32 start_rem, blkcnt_rem;
  72         struct mmc *mmc = find_mmc_device(dev_num);
  73         lbaint_t blk = 0, blk_r = 0;
  74         int timeout = 1000;
  75
  76         if (!mmc)
  77                 return -1;
  78
  79         /*
  80          * We want to see if the requested start or total block count are
  81          * unaligned.  We discard the whole numbers and only care about the
  82          * remainder.
  83          */
  84         err = div_u64_rem(start, mmc->erase_grp_size, &start_rem);
  85         err = div_u64_rem(blkcnt, mmc->erase_grp_size, &blkcnt_rem);
  86         if (start_rem || blkcnt_rem)
  87                 printf("\n\nCaution! Your devices Erase group is 0x%x\n"
  88                        "The erase range would be change to "
  89                        "0x" LBAF "~0x" LBAF "\n\n",
  90                        mmc->erase_grp_size, start & ~(mmc->erase_grp_size - 1),
  91                        ((start + blkcnt + mmc->erase_grp_size)
  92                        & ~(mmc->erase_grp_size - 1)) - 1);
  93
  94         while (blk < blkcnt) {
  95                 blk_r = ((blkcnt - blk) > mmc->erase_grp_size) ?
  96                         mmc->erase_grp_size : (blkcnt - blk);
  97                 err = mmc_erase_t(mmc, start + blk, blk_r);
  98                 if (err)
  99                         break;
 100
 101                 blk += blk_r;
 102
 103                 /* Waiting for the ready status */
 104                 if (mmc_send_status(mmc, timeout))
 105                         return 0;
 106         }
 107
 108         return blk;
 109 }
 110
 111 static ulong mmc_write_blocks(struct mmc *mmc, lbaint_t start,
 112                 lbaint_t blkcnt, const void *src)
 113 {
 114         struct mmc_cmd cmd;
 115         struct mmc_data data;
 116         int timeout = 1000;
 117
 118         if ((start + blkcnt) > mmc->block_dev.lba) {
 119                 printf("MMC: block number 0x" LBAF " exceeds max(0x" LBAF ")\n",
 120                        start + blkcnt, mmc->block_dev.lba);
 121                 return 0;
 122         }
 123
 124         if (blkcnt == 0)
 125                 return 0;
 126         else if (blkcnt == 1)
 127                 cmd.cmdidx = MMC_CMD_WRITE_SINGLE_BLOCK;
 128         else
 129                 cmd.cmdidx = MMC_CMD_WRITE_MULTIPLE_BLOCK;
 130
 131         if (mmc->high_capacity)
 132                 cmd.cmdarg = start;
 133         else
 134                 cmd.cmdarg = start * mmc->write_bl_len;
 135
 136         cmd.resp_type = MMC_RSP_R1;
 137
 138         data.src = src;
 139         data.blocks = blkcnt;
 140         data.blocksize = mmc->write_bl_len;
 141         data.flags = MMC_DATA_WRITE;
 142
 143         if (mmc_send_cmd(mmc, &cmd, &data)) {
 144                 printf("mmc write failed\n");
 145                 return 0;
 146         }
 147
 148         /* SPI multiblock writes terminate using a special
 149          * token, not a STOP_TRANSMISSION request.
 150          */
 151         if (!mmc_host_is_spi(mmc) && blkcnt > 1) {
 152                 cmd.cmdidx = MMC_CMD_STOP_TRANSMISSION;
 153                 cmd.cmdarg = 0;
 154                 cmd.resp_type = MMC_RSP_R1b;
 155                 if (mmc_send_cmd(mmc, &cmd, NULL)) {
 156                         printf("mmc fail to send stop cmd\n");
 157                         return 0;
 158                 }
 159         }
 160
 161         /* Waiting for the ready status */
 162         if (mmc_send_status(mmc, timeout))
 163                 return 0;
 164
 165         return blkcnt;
 166 }
 167
 168 ulong mmc_bwrite(int dev_num, lbaint_t start, lbaint_t blkcnt, const void *src)
 169 {
 170         lbaint_t cur, blocks_todo = blkcnt;
 171
 172         struct mmc *mmc = find_mmc_device(dev_num);
 173         if (!mmc)
 174                 return 0;
 175
 176         if (mmc_set_blocklen(mmc, mmc->write_bl_len))
 177                 return 0;
 178
 179         do {
 180                 cur = (blocks_todo > mmc->cfg->b_max) ?
 181                         mmc->cfg->b_max : blocks_todo;
 182                 if (mmc_write_blocks(mmc, start, cur, src) != cur)
 183                         return 0;
 184                 blocks_todo -= cur;
 185                 start += cur;
 186                 src += cur * mmc->write_bl_len;
 187         } while (blocks_todo > 0);
 188
 189         return blkcnt;
 190 }