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