sys/bus/mmc/mmc_subr.c

   1 /*-
   2  * Copyright (c) 2006 Bernd Walter.  All rights reserved.
   3  * Copyright (c) 2006 M. Warner Losh.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  15  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  16  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  17  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  18  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  19  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  20  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  21  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  23  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  *
  25  * Portions of this software may have been developed with reference to
  26  * the SD Simplified Specification.  The following disclaimer may apply:
  27  *
  28  * The following conditions apply to the release of the simplified
  29  * specification ("Simplified Specification") by the SD Card Association and
  30  * the SD Group. The Simplified Specification is a subset of the complete SD
  31  * Specification which is owned by the SD Card Association and the SD
  32  * Group. This Simplified Specification is provided on a non-confidential
  33  * basis subject to the disclaimers below. Any implementation of the
  34  * Simplified Specification may require a license from the SD Card
  35  * Association, SD Group, SD-3C LLC or other third parties.
  36  *
  37  * Disclaimers:
  38  *
  39  * The information contained in the Simplified Specification is presented only
  40  * as a standard specification for SD Cards and SD Host/Ancillary products and
  41  * is provided "AS-IS" without any representations or warranties of any
  42  * kind. No responsibility is assumed by the SD Group, SD-3C LLC or the SD
  43  * Card Association for any damages, any infringements of patents or other
  44  * right of the SD Group, SD-3C LLC, the SD Card Association or any third
  45  * parties, which may result from its use. No license is granted by
  46  * implication, estoppel or otherwise under any patent or other rights of the
  47  * SD Group, SD-3C LLC, the SD Card Association or any third party. Nothing
  48  * herein shall be construed as an obligation by the SD Group, the SD-3C LLC
  49  * or the SD Card Association to disclose or distribute any technical
  50  * information, know-how or other confidential information to any third party.
  51  *
  52  * $FreeBSD: head/sys/dev/mmc/mmc_subr.c 315430 2017-03-16 22:23:04Z marius $
  53  */
  54
  55 #include <sys/param.h>
  56 #include <sys/systm.h>
  57 #include <sys/kernel.h>
  58 #include <sys/lock.h>
  59 #include <sys/time.h>
  60 #include <sys/bus.h>
  61
  62 #include <bus/mmc/bridge.h>
  63 #include <bus/mmc/mmc_private.h>
  64 #include <bus/mmc/mmc_subr.h>
  65 #include <bus/mmc/mmcreg.h>
  66 #include <bus/mmc/mmcbrvar.h>
  67
  68 #include "mmcbus_if.h"
  69
  70 #define CMD_RETRIES     3
  71 #define LOG_PPS         5 /* Log no more than 5 errors per second. */
  72
  73 int
  74 mmc_wait_for_cmd(device_t brdev, device_t reqdev, struct mmc_command *cmd,
  75     int retries)
  76 {
  77         struct mmc_request mreq;
  78         struct mmc_softc *sc;
  79         int err;
  80
  81         do {
  82                 memset(&mreq, 0, sizeof(mreq));
  83                 memset(cmd->resp, 0, sizeof(cmd->resp));
  84                 cmd->retries = 0; /* Retries done here, not in hardware. */
  85                 cmd->mrq = &mreq;
  86                 if (cmd->data != NULL)
  87                         cmd->data->mrq = &mreq;
  88                 mreq.cmd = cmd;
  89                 if (MMCBUS_WAIT_FOR_REQUEST(brdev, reqdev, &mreq) != 0)
  90                         err = MMC_ERR_FAILED;
  91                 else
  92                         err = cmd->error;
  93         } while (err != MMC_ERR_NONE && retries-- > 0);
  94
  95         if (err != MMC_ERR_NONE && brdev == reqdev) {
  96                 sc = device_get_softc(brdev);
  97                 if (sc->squelched == 0 && ppsratecheck(&sc->log_time,
  98                     &sc->log_count, LOG_PPS)) {
  99                         device_printf(sc->dev, "CMD%d failed, RESULT: %d\n",
 100                             cmd->opcode, err);
 101                 }
 102         }
 103
 104         return (err);
 105 }
 106
 107 int
 108 mmc_wait_for_app_cmd(device_t brdev, device_t reqdev, uint16_t rca,
 109     struct mmc_command *cmd, int retries)
 110 {
 111         struct mmc_command appcmd;
 112         struct mmc_softc *sc;
 113         int err;
 114
 115         sc = device_get_softc(brdev);
 116
 117         /* Squelch error reporting at lower levels, we report below. */
 118         sc->squelched++;
 119         do {
 120                 memset(&appcmd, 0, sizeof(appcmd));
 121                 appcmd.opcode = MMC_APP_CMD;
 122                 appcmd.arg = (uint32_t)rca << 16;
 123                 appcmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
 124                 if (mmc_wait_for_cmd(brdev, reqdev, &appcmd, 0) != 0)
 125                         err = MMC_ERR_FAILED;
 126                 else
 127                         err = appcmd.error;
 128                 if (err == MMC_ERR_NONE) {
 129                         if (!(appcmd.resp[0] & R1_APP_CMD))
 130                                 err = MMC_ERR_FAILED;
 131                         else if (mmc_wait_for_cmd(brdev, reqdev, cmd, 0) != 0)
 132                                 err = MMC_ERR_FAILED;
 133                         else
 134                                 err = cmd->error;
 135                 }
 136         } while (err != MMC_ERR_NONE && retries-- > 0);
 137         sc->squelched--;
 138
 139         if (err != MMC_ERR_NONE && brdev == reqdev) {
 140                 sc = device_get_softc(brdev);
 141                 if (sc->squelched == 0 && ppsratecheck(&sc->log_time,
 142                     &sc->log_count, LOG_PPS)) {
 143                         device_printf(sc->dev, "ACMD%d failed, RESULT: %d\n",
 144                             cmd->opcode, err);
 145                 }
 146         }
 147
 148         return (err);
 149 }
 150
 151 int
 152 mmc_switch(device_t brdev, device_t reqdev, uint16_t rca, uint8_t set,
 153     uint8_t index, uint8_t value, u_int timeout, bool status)
 154 {
 155         struct mmc_command cmd;
 156         int err;
 157
 158         KASSERT(timeout != 0, ("%s: no timeout", __func__));
 159
 160         memset(&cmd, 0, sizeof(cmd));
 161         cmd.opcode = MMC_SWITCH_FUNC;
 162         cmd.arg = (MMC_SWITCH_FUNC_WR << 24) | (index << 16) | (value << 8) |
 163             set;
 164         /*
 165          * If the hardware supports busy detection but the switch timeout
 166          * exceeds the maximum host timeout, use a R1 instead of a R1B
 167          * response in order to keep the hardware from timing out.
 168          */
 169         if (mmcbr_get_caps(brdev) & MMC_CAP_WAIT_WHILE_BUSY &&
 170             timeout > mmcbr_get_max_busy_timeout(brdev))
 171                 cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
 172         else
 173                 cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
 174         err = mmc_wait_for_cmd(brdev, reqdev, &cmd, CMD_RETRIES);
 175         if (err != MMC_ERR_NONE || status == false)
 176                 return (err);
 177         return (mmc_switch_status(brdev, reqdev, rca, timeout));
 178 }
 179
 180 int
 181 mmc_switch_status(device_t brdev, device_t reqdev, uint16_t rca, u_int timeout)
 182 {
 183         struct timeval cur, end;
 184         int err;
 185         uint32_t status;
 186
 187         KASSERT(timeout != 0, ("%s: no timeout", __func__));
 188
 189         /*
 190          * Note that when using a R1B response in mmc_switch(), bridges of
 191          * type MMC_CAP_WAIT_WHILE_BUSY will issue mmc_send_status() only
 192          * once and then exit the loop.
 193          */
 194         for (;;) {
 195                 err = mmc_send_status(brdev, reqdev, rca, &status);
 196                 if (err != MMC_ERR_NONE)
 197                         break;
 198                 if (R1_CURRENT_STATE(status) == R1_STATE_TRAN)
 199                         break;
 200                 getmicrouptime(&cur);
 201                 if (end.tv_sec == 0 && end.tv_usec == 0) {
 202                         end.tv_usec = timeout;
 203                         timevaladd(&end, &cur);
 204                 }
 205                 if (timevalcmp(&cur, &end, >)) {
 206                         err = MMC_ERR_TIMEOUT;
 207                         break;
 208                 }
 209         }
 210         if (err == MMC_ERR_NONE && R1_CURRENT_STATE(status) == R1_SWITCH_ERROR)
 211                 return (MMC_ERR_FAILED);
 212         return (err);
 213 }
 214
 215 int
 216 mmc_send_ext_csd(device_t brdev, device_t reqdev, uint8_t *rawextcsd)
 217 {
 218         struct mmc_command cmd;
 219         struct mmc_data data;
 220         int err;
 221
 222         memset(&cmd, 0, sizeof(cmd));
 223         memset(&data, 0, sizeof(data));
 224
 225         memset(rawextcsd, 0, MMC_EXTCSD_SIZE);
 226         cmd.opcode = MMC_SEND_EXT_CSD;
 227         cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
 228         cmd.data = &data;
 229
 230         data.data = rawextcsd;
 231         data.len = MMC_EXTCSD_SIZE;
 232         data.flags = MMC_DATA_READ;
 233
 234         err = mmc_wait_for_cmd(brdev, reqdev, &cmd, CMD_RETRIES);
 235         return (err);
 236 }
 237
 238 int
 239 mmc_send_status(device_t brdev, device_t reqdev, uint16_t rca, uint32_t *status)
 240 {
 241         struct mmc_command cmd;
 242         int err;
 243
 244         memset(&cmd, 0, sizeof(cmd));
 245         cmd.opcode = MMC_SEND_STATUS;
 246         cmd.arg = (uint32_t)rca << 16;
 247         cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
 248         err = mmc_wait_for_cmd(brdev, reqdev, &cmd, CMD_RETRIES);
 249         *status = cmd.resp[0];
 250         return (err);
 251 }