drivers/mmc/core/sdio_ops.c

   1 /*
   2  *  linux/drivers/mmc/sdio_ops.c
   3  *
   4  *  Copyright 2006-2007 Pierre Ossman
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or (at
   9  * your option) any later version.
  10  */
  11
  12 #include <linux/scatterlist.h>
  13
  14 #include <linux/mmc/host.h>
  15 #include <linux/mmc/card.h>
  16 #include <linux/mmc/mmc.h>
  17 #include <linux/mmc/sdio.h>
  18
  19 #include "core.h"
  20
  21 int mmc_send_io_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
  22 {
  23         struct mmc_command cmd;
  24         int i, err = 0;
  25
  26         BUG_ON(!host);
  27
  28         memset(&cmd, 0, sizeof(struct mmc_command));
  29
  30         cmd.opcode = SD_IO_SEND_OP_COND;
  31         cmd.arg = ocr;
  32         cmd.flags = MMC_RSP_SPI_R4 | MMC_RSP_R4 | MMC_CMD_BCR;
  33
  34         for (i = 100; i; i--) {
  35                 err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
  36                 if (err)
  37                         break;
  38
  39                 /* if we're just probing, do a single pass */
  40                 if (ocr == 0)
  41                         break;
  42
  43                 /* otherwise wait until reset completes */
  44                 if (mmc_host_is_spi(host)) {
  45                         /*
  46                          * Both R1_SPI_IDLE and MMC_CARD_BUSY indicate
  47                          * an initialized card under SPI, but some cards
  48                          * (Marvell's) only behave when looking at this
  49                          * one.
  50                          */
  51                         if (cmd.resp[1] & MMC_CARD_BUSY)
  52                                 break;
  53                 } else {
  54                         if (cmd.resp[0] & MMC_CARD_BUSY)
  55                                 break;
  56                 }
  57
  58                 err = -ETIMEDOUT;
  59
  60                 mmc_delay(10);
  61         }
  62
  63         if (rocr)
  64                 *rocr = cmd.resp[mmc_host_is_spi(host) ? 1 : 0];
  65
  66         return err;
  67 }
  68
  69 int mmc_io_rw_direct(struct mmc_card *card, int write, unsigned fn,
  70         unsigned addr, u8 in, u8* out)
  71 {
  72         struct mmc_command cmd;
  73         int err;
  74
  75         BUG_ON(!card);
  76         BUG_ON(fn > 7);
  77
  78         memset(&cmd, 0, sizeof(struct mmc_command));
  79
  80         cmd.opcode = SD_IO_RW_DIRECT;
  81         cmd.arg = write ? 0x80000000 : 0x00000000;
  82         cmd.arg |= fn << 28;
  83         cmd.arg |= (write && out) ? 0x08000000 : 0x00000000;
  84         cmd.arg |= addr << 9;
  85         cmd.arg |= in;
  86         cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_AC;
  87
  88         err = mmc_wait_for_cmd(card->host, &cmd, 0);
  89         if (err)
  90                 return err;
  91
  92         if (mmc_host_is_spi(card->host)) {
  93                 /* host driver already reported errors */
  94         } else {
  95                 if (cmd.resp[0] & R5_ERROR)
  96                         return -EIO;
  97                 if (cmd.resp[0] & R5_FUNCTION_NUMBER)
  98                         return -EINVAL;
  99                 if (cmd.resp[0] & R5_OUT_OF_RANGE)
 100                         return -ERANGE;
 101         }
 102
 103         if (out) {
 104                 if (mmc_host_is_spi(card->host))
 105                         *out = (cmd.resp[0] >> 8) & 0xFF;
 106                 else
 107                         *out = cmd.resp[0] & 0xFF;
 108         }
 109
 110         return 0;
 111 }
 112
 113 int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn,
 114         unsigned addr, int incr_addr, u8 *buf, unsigned blocks, unsigned blksz)
 115 {
 116         struct mmc_request mrq;
 117         struct mmc_command cmd;
 118         struct mmc_data data;
 119         struct scatterlist sg;
 120
 121         BUG_ON(!card);
 122         BUG_ON(fn > 7);
 123         BUG_ON(blocks == 1 && blksz > 512);
 124         WARN_ON(blocks == 0);
 125         WARN_ON(blksz == 0);
 126
 127         memset(&mrq, 0, sizeof(struct mmc_request));
 128         memset(&cmd, 0, sizeof(struct mmc_command));
 129         memset(&data, 0, sizeof(struct mmc_data));
 130
 131         mrq.cmd = &cmd;
 132         mrq.data = &data;
 133
 134         cmd.opcode = SD_IO_RW_EXTENDED;
 135         cmd.arg = write ? 0x80000000 : 0x00000000;
 136         cmd.arg |= fn << 28;
 137         cmd.arg |= incr_addr ? 0x04000000 : 0x00000000;
 138         cmd.arg |= addr << 9;
 139         if (blocks == 1 && blksz <= 512)
 140                 cmd.arg |= (blksz == 512) ? 0 : blksz;  /* byte mode */
 141         else
 142                 cmd.arg |= 0x08000000 | blocks;         /* block mode */
 143         cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC;
 144
 145         data.blksz = blksz;
 146         data.blocks = blocks;
 147         data.flags = write ? MMC_DATA_WRITE : MMC_DATA_READ;
 148         data.sg = &sg;
 149         data.sg_len = 1;
 150
 151         sg_init_one(&sg, buf, blksz * blocks);
 152
 153         mmc_set_data_timeout(&data, card);
 154
 155         mmc_wait_for_req(card->host, &mrq);
 156
 157         if (cmd.error)
 158                 return cmd.error;
 159         if (data.error)
 160                 return data.error;
 161
 162         if (mmc_host_is_spi(card->host)) {
 163                 /* host driver already reported errors */
 164         } else {
 165                 if (cmd.resp[0] & R5_ERROR)
 166                         return -EIO;
 167                 if (cmd.resp[0] & R5_FUNCTION_NUMBER)
 168                         return -EINVAL;
 169                 if (cmd.resp[0] & R5_OUT_OF_RANGE)
 170                         return -ERANGE;
 171         }
 172
 173         return 0;
 174 }
 175