275 lines
8.5 KiB
C
275 lines
8.5 KiB
C
/*-
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* Copyright (c) 2006 Bernd Walter. All rights reserved.
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* Copyright (c) 2006 M. Warner Losh <imp@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Portions of this software may have been developed with reference to
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* the SD Simplified Specification. The following disclaimer may apply:
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*
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* The following conditions apply to the release of the simplified
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* specification ("Simplified Specification") by the SD Card Association and
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* the SD Group. The Simplified Specification is a subset of the complete SD
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* Specification which is owned by the SD Card Association and the SD
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* Group. This Simplified Specification is provided on a non-confidential
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* basis subject to the disclaimers below. Any implementation of the
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* Simplified Specification may require a license from the SD Card
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* Association, SD Group, SD-3C LLC or other third parties.
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*
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* Disclaimers:
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*
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* The information contained in the Simplified Specification is presented only
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* as a standard specification for SD Cards and SD Host/Ancillary products and
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* is provided "AS-IS" without any representations or warranties of any
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* kind. No responsibility is assumed by the SD Group, SD-3C LLC or the SD
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* Card Association for any damages, any infringements of patents or other
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* right of the SD Group, SD-3C LLC, the SD Card Association or any third
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* parties, which may result from its use. No license is granted by
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* implication, estoppel or otherwise under any patent or other rights of the
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* SD Group, SD-3C LLC, the SD Card Association or any third party. Nothing
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* herein shall be construed as an obligation by the SD Group, the SD-3C LLC
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* or the SD Card Association to disclose or distribute any technical
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* information, know-how or other confidential information to any third party.
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*/
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#include <sys/cdefs.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/time.h>
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#include <dev/mmc/bridge.h>
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#include <dev/mmc/mmc_private.h>
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#include <dev/mmc/mmc_subr.h>
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#include <dev/mmc/mmcreg.h>
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#include <dev/mmc/mmcbrvar.h>
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#include "mmcbus_if.h"
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#define CMD_RETRIES 3
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#define LOG_PPS 5 /* Log no more than 5 errors per second. */
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int
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mmc_wait_for_cmd(device_t busdev, device_t dev, struct mmc_command *cmd,
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int retries)
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{
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struct mmc_request mreq;
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struct mmc_softc *sc;
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int err;
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do {
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memset(&mreq, 0, sizeof(mreq));
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memset(cmd->resp, 0, sizeof(cmd->resp));
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cmd->retries = 0; /* Retries done here, not in hardware. */
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cmd->mrq = &mreq;
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if (cmd->data != NULL)
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cmd->data->mrq = &mreq;
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mreq.cmd = cmd;
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if (MMCBUS_WAIT_FOR_REQUEST(busdev, dev, &mreq) != 0)
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err = MMC_ERR_FAILED;
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else
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err = cmd->error;
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} while (err != MMC_ERR_NONE && retries-- > 0);
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if (err != MMC_ERR_NONE && busdev == dev) {
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sc = device_get_softc(busdev);
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if (sc->squelched == 0 && ppsratecheck(&sc->log_time,
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&sc->log_count, LOG_PPS)) {
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device_printf(sc->dev, "CMD%d failed, RESULT: %d\n",
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cmd->opcode, err);
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}
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}
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return (err);
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}
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int
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mmc_wait_for_app_cmd(device_t busdev, device_t dev, uint16_t rca,
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struct mmc_command *cmd, int retries)
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{
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struct mmc_command appcmd;
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struct mmc_softc *sc;
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int err;
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sc = device_get_softc(busdev);
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/* Squelch error reporting at lower levels, we report below. */
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sc->squelched++;
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do {
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memset(&appcmd, 0, sizeof(appcmd));
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appcmd.opcode = MMC_APP_CMD;
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appcmd.arg = (uint32_t)rca << 16;
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appcmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
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if (mmc_wait_for_cmd(busdev, dev, &appcmd, 0) != 0)
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err = MMC_ERR_FAILED;
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else
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err = appcmd.error;
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if (err == MMC_ERR_NONE) {
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if (!(appcmd.resp[0] & R1_APP_CMD))
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err = MMC_ERR_FAILED;
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else if (mmc_wait_for_cmd(busdev, dev, cmd, 0) != 0)
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err = MMC_ERR_FAILED;
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else
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err = cmd->error;
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}
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} while (err != MMC_ERR_NONE && retries-- > 0);
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sc->squelched--;
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if (err != MMC_ERR_NONE && busdev == dev) {
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if (sc->squelched == 0 && ppsratecheck(&sc->log_time,
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&sc->log_count, LOG_PPS)) {
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device_printf(sc->dev, "ACMD%d failed, RESULT: %d\n",
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cmd->opcode, err);
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}
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}
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return (err);
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}
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int
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mmc_switch(device_t busdev, device_t dev, uint16_t rca, uint8_t set,
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uint8_t index, uint8_t value, u_int timeout, bool status)
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{
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struct mmc_command cmd;
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struct mmc_softc *sc;
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int err;
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KASSERT(timeout != 0, ("%s: no timeout", __func__));
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sc = device_get_softc(busdev);
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memset(&cmd, 0, sizeof(cmd));
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cmd.opcode = MMC_SWITCH_FUNC;
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cmd.arg = (MMC_SWITCH_FUNC_WR << 24) | (index << 16) | (value << 8) |
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set;
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/*
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* If the hardware supports busy detection but the switch timeout
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* exceeds the maximum host timeout, use a R1 instead of a R1B
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* response in order to keep the hardware from timing out.
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*/
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if (mmcbr_get_caps(busdev) & MMC_CAP_WAIT_WHILE_BUSY &&
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timeout > mmcbr_get_max_busy_timeout(busdev))
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cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
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else
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cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
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/*
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* Pause re-tuning so it won't interfere with the busy state and also
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* so that the result of CMD13 will always refer to switching rather
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* than to a tuning command that may have snuck in between.
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*/
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sc->retune_paused++;
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err = mmc_wait_for_cmd(busdev, dev, &cmd, CMD_RETRIES);
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if (err != MMC_ERR_NONE || status == false)
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goto out;
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err = mmc_switch_status(busdev, dev, rca, timeout);
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out:
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sc->retune_paused--;
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return (err);
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}
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int
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mmc_switch_status(device_t busdev, device_t dev, uint16_t rca, u_int timeout)
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{
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struct timeval cur, end;
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int err, crc_timeout;
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uint32_t status;
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KASSERT(timeout != 0, ("%s: no timeout", __func__));
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/*
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* Note that when using a R1B response in mmc_switch(), bridges of
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* type MMC_CAP_WAIT_WHILE_BUSY will issue mmc_send_status() only
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* once and then exit the loop.
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*/
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end.tv_sec = end.tv_usec = 0;
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for (;;) {
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crc_timeout=0;
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do {
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/*
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* CRC errors indicate that the command wasn't accepted
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* and executed due to a communications error. Retry
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* CRC errors a couple of times to cope with transient
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* failures.
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*
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* This is required for some cheap laptops to boot.
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*/
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err = mmc_send_status(busdev, dev, rca, &status);
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crc_timeout++;
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} while (err == MMC_ERR_BADCRC && crc_timeout < 10);
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if (err != MMC_ERR_NONE)
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break;
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if (R1_CURRENT_STATE(status) == R1_STATE_TRAN)
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break;
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getmicrouptime(&cur);
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if (end.tv_sec == 0 && end.tv_usec == 0) {
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end.tv_usec = timeout;
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timevaladd(&end, &cur);
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}
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if (timevalcmp(&cur, &end, >)) {
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err = MMC_ERR_TIMEOUT;
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break;
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}
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}
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if (err == MMC_ERR_NONE && (status & R1_SWITCH_ERROR) != 0)
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return (MMC_ERR_FAILED);
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return (err);
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}
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int
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mmc_send_ext_csd(device_t busdev, device_t dev, uint8_t *rawextcsd)
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{
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struct mmc_command cmd;
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struct mmc_data data;
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int err;
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memset(&cmd, 0, sizeof(cmd));
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memset(&data, 0, sizeof(data));
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memset(rawextcsd, 0, MMC_EXTCSD_SIZE);
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cmd.opcode = MMC_SEND_EXT_CSD;
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cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
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cmd.data = &data;
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data.data = rawextcsd;
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data.len = MMC_EXTCSD_SIZE;
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data.flags = MMC_DATA_READ;
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err = mmc_wait_for_cmd(busdev, dev, &cmd, CMD_RETRIES);
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return (err);
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}
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int
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mmc_send_status(device_t busdev, device_t dev, uint16_t rca, uint32_t *status)
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{
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struct mmc_command cmd;
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int err;
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memset(&cmd, 0, sizeof(cmd));
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cmd.opcode = MMC_SEND_STATUS;
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cmd.arg = (uint32_t)rca << 16;
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cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
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err = mmc_wait_for_cmd(busdev, dev, &cmd, CMD_RETRIES);
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*status = cmd.resp[0];
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return (err);
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}
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