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mmc.c
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mmc.c
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/*-
* Copyright (c) 2006 Bernd Walter. All rights reserved.
* Copyright (c) 2006 M. Warner Losh. All rights reserved.
* Copyright (c) 2017 Marius Strobl <marius@FreeBSD.org>
*
* 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/malloc.h>
#include <sys/lock.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/bus.h>
#include <sys/endian.h>
#include <sys/sysctl.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 <dev/mmc/mmcvar.h>
#include "mmcbr_if.h"
#include "mmcbus_if.h"
CTASSERT(bus_timing_max <= sizeof(uint32_t) * NBBY);
/*
* Per-card data
*/
struct mmc_ivars {
uint32_t raw_cid[4]; /* Raw bits of the CID */
uint32_t raw_csd[4]; /* Raw bits of the CSD */
uint32_t raw_scr[2]; /* Raw bits of the SCR */
uint8_t raw_ext_csd[MMC_EXTCSD_SIZE]; /* Raw bits of the EXT_CSD */
uint32_t raw_sd_status[16]; /* Raw bits of the SD_STATUS */
uint16_t rca;
u_char read_only; /* True when the device is read-only */
u_char high_cap; /* High Capacity device (block addressed) */
enum mmc_card_mode mode;
enum mmc_bus_width bus_width; /* Bus width to use */
struct mmc_cid cid; /* cid decoded */
struct mmc_csd csd; /* csd decoded */
struct mmc_scr scr; /* scr decoded */
struct mmc_sd_status sd_status; /* SD_STATUS decoded */
uint32_t sec_count; /* Card capacity in 512byte blocks */
uint32_t timings; /* Mask of bus timings supported */
uint32_t vccq_120; /* Mask of bus timings at VCCQ of 1.2 V */
uint32_t vccq_180; /* Mask of bus timings at VCCQ of 1.8 V */
uint32_t tran_speed; /* Max speed in normal mode */
uint32_t hs_tran_speed; /* Max speed in high speed mode */
uint32_t erase_sector; /* Card native erase sector size */
uint32_t cmd6_time; /* Generic switch timeout [us] */
uint32_t quirks; /* Quirks as per mmc_quirk->quirks */
char card_id_string[64];/* Formatted CID info (serial, MFG, etc) */
char card_sn_string[16];/* Formatted serial # for disk->d_ident */
};
#define CMD_RETRIES 3
static const struct mmc_quirk mmc_quirks[] = {
/*
* For some SanDisk iNAND devices, the CMD38 argument needs to be
* provided in EXT_CSD[113].
*/
{ 0x2, 0x100, "SEM02G", MMC_QUIRK_INAND_CMD38 },
{ 0x2, 0x100, "SEM04G", MMC_QUIRK_INAND_CMD38 },
{ 0x2, 0x100, "SEM08G", MMC_QUIRK_INAND_CMD38 },
{ 0x2, 0x100, "SEM16G", MMC_QUIRK_INAND_CMD38 },
{ 0x2, 0x100, "SEM32G", MMC_QUIRK_INAND_CMD38 },
/*
* Disable TRIM for Kingston eMMCs where a firmware bug can lead to
* unrecoverable data corruption.
*/
{ 0x70, MMC_QUIRK_OID_ANY, "V10008", MMC_QUIRK_BROKEN_TRIM },
{ 0x70, MMC_QUIRK_OID_ANY, "V10016", MMC_QUIRK_BROKEN_TRIM },
{ 0x0, 0x0, NULL, 0x0 }
};
static SYSCTL_NODE(_hw, OID_AUTO, mmc, CTLFLAG_RD, NULL, "mmc driver");
static int mmc_debug;
SYSCTL_INT(_hw_mmc, OID_AUTO, debug, CTLFLAG_RWTUN, &mmc_debug, 0,
"Debug level");
/* bus entry points */
static int mmc_acquire_bus(device_t busdev, device_t dev);
static int mmc_attach(device_t dev);
static int mmc_child_location_str(device_t dev, device_t child, char *buf,
size_t buflen);
static int mmc_detach(device_t dev);
static int mmc_probe(device_t dev);
static int mmc_read_ivar(device_t bus, device_t child, int which,
uintptr_t *result);
static int mmc_release_bus(device_t busdev, device_t dev);
static int mmc_resume(device_t dev);
static void mmc_retune_pause(device_t busdev, device_t dev, bool retune);
static void mmc_retune_unpause(device_t busdev, device_t dev);
static int mmc_suspend(device_t dev);
static int mmc_wait_for_request(device_t busdev, device_t dev,
struct mmc_request *req);
static int mmc_write_ivar(device_t bus, device_t child, int which,
uintptr_t value);
#define MMC_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx)
#define MMC_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx)
#define MMC_LOCK_INIT(_sc) \
mtx_init(&(_sc)->sc_mtx, device_get_nameunit((_sc)->dev), \
"mmc", MTX_DEF)
#define MMC_LOCK_DESTROY(_sc) mtx_destroy(&(_sc)->sc_mtx);
#define MMC_ASSERT_LOCKED(_sc) mtx_assert(&(_sc)->sc_mtx, MA_OWNED);
#define MMC_ASSERT_UNLOCKED(_sc) mtx_assert(&(_sc)->sc_mtx, MA_NOTOWNED);
static int mmc_all_send_cid(struct mmc_softc *sc, uint32_t *rawcid);
static void mmc_app_decode_scr(uint32_t *raw_scr, struct mmc_scr *scr);
static void mmc_app_decode_sd_status(uint32_t *raw_sd_status,
struct mmc_sd_status *sd_status);
static int mmc_app_sd_status(struct mmc_softc *sc, uint16_t rca,
uint32_t *rawsdstatus);
static int mmc_app_send_scr(struct mmc_softc *sc, uint16_t rca,
uint32_t *rawscr);
static int mmc_calculate_clock(struct mmc_softc *sc);
static void mmc_decode_cid_mmc(uint32_t *raw_cid, struct mmc_cid *cid,
bool is_4_41p);
static void mmc_decode_cid_sd(uint32_t *raw_cid, struct mmc_cid *cid);
static void mmc_decode_csd_mmc(uint32_t *raw_csd, struct mmc_csd *csd);
static int mmc_decode_csd_sd(uint32_t *raw_csd, struct mmc_csd *csd);
static void mmc_delayed_attach(void *xsc);
static int mmc_delete_cards(struct mmc_softc *sc, bool final);
static void mmc_discover_cards(struct mmc_softc *sc);
static void mmc_format_card_id_string(struct mmc_ivars *ivar);
static void mmc_go_discovery(struct mmc_softc *sc);
static uint32_t mmc_get_bits(uint32_t *bits, int bit_len, int start,
int size);
static int mmc_highest_voltage(uint32_t ocr);
static bool mmc_host_timing(device_t dev, enum mmc_bus_timing timing);
static void mmc_idle_cards(struct mmc_softc *sc);
static void mmc_ms_delay(int ms);
static void mmc_log_card(device_t dev, struct mmc_ivars *ivar, int newcard);
static void mmc_power_down(struct mmc_softc *sc);
static void mmc_power_up(struct mmc_softc *sc);
static void mmc_rescan_cards(struct mmc_softc *sc);
static int mmc_retune(device_t busdev, device_t dev, bool reset);
static void mmc_scan(struct mmc_softc *sc);
static int mmc_sd_switch(struct mmc_softc *sc, uint8_t mode, uint8_t grp,
uint8_t value, uint8_t *res);
static int mmc_select_card(struct mmc_softc *sc, uint16_t rca);
static uint32_t mmc_select_vdd(struct mmc_softc *sc, uint32_t ocr);
static int mmc_send_app_op_cond(struct mmc_softc *sc, uint32_t ocr,
uint32_t *rocr);
static int mmc_send_csd(struct mmc_softc *sc, uint16_t rca, uint32_t *rawcsd);
static int mmc_send_if_cond(struct mmc_softc *sc, uint8_t vhs);
static int mmc_send_op_cond(struct mmc_softc *sc, uint32_t ocr,
uint32_t *rocr);
static int mmc_send_relative_addr(struct mmc_softc *sc, uint32_t *resp);
static int mmc_set_blocklen(struct mmc_softc *sc, uint32_t len);
static int mmc_set_card_bus_width(struct mmc_softc *sc, struct mmc_ivars *ivar,
enum mmc_bus_timing timing);
static int mmc_set_power_class(struct mmc_softc *sc, struct mmc_ivars *ivar);
static int mmc_set_relative_addr(struct mmc_softc *sc, uint16_t resp);
static int mmc_set_timing(struct mmc_softc *sc, struct mmc_ivars *ivar,
enum mmc_bus_timing timing);
static int mmc_set_vccq(struct mmc_softc *sc, struct mmc_ivars *ivar,
enum mmc_bus_timing timing);
static int mmc_switch_to_hs200(struct mmc_softc *sc, struct mmc_ivars *ivar,
uint32_t clock);
static int mmc_switch_to_hs400(struct mmc_softc *sc, struct mmc_ivars *ivar,
uint32_t max_dtr, enum mmc_bus_timing max_timing);
static int mmc_test_bus_width(struct mmc_softc *sc);
static uint32_t mmc_timing_to_dtr(struct mmc_ivars *ivar,
enum mmc_bus_timing timing);
static const char *mmc_timing_to_string(enum mmc_bus_timing timing);
static void mmc_update_child_list(struct mmc_softc *sc);
static int mmc_wait_for_command(struct mmc_softc *sc, uint32_t opcode,
uint32_t arg, uint32_t flags, uint32_t *resp, int retries);
static int mmc_wait_for_req(struct mmc_softc *sc, struct mmc_request *req);
static void mmc_wakeup(struct mmc_request *req);
static void
mmc_ms_delay(int ms)
{
DELAY(1000 * ms); /* XXX BAD */
}
static int
mmc_probe(device_t dev)
{
device_set_desc(dev, "MMC/SD bus");
return (0);
}
static int
mmc_attach(device_t dev)
{
struct mmc_softc *sc;
sc = device_get_softc(dev);
sc->dev = dev;
MMC_LOCK_INIT(sc);
/* We'll probe and attach our children later, but before / mount */
sc->config_intrhook.ich_func = mmc_delayed_attach;
sc->config_intrhook.ich_arg = sc;
if (config_intrhook_establish(&sc->config_intrhook) != 0)
device_printf(dev, "config_intrhook_establish failed\n");
return (0);
}
static int
mmc_detach(device_t dev)
{
struct mmc_softc *sc = device_get_softc(dev);
int err;
err = mmc_delete_cards(sc, true);
if (err != 0)
return (err);
mmc_power_down(sc);
MMC_LOCK_DESTROY(sc);
return (0);
}
static int
mmc_suspend(device_t dev)
{
struct mmc_softc *sc = device_get_softc(dev);
int err;
err = bus_generic_suspend(dev);
if (err != 0)
return (err);
/*
* We power down with the bus acquired here, mainly so that no device
* is selected any longer and sc->last_rca gets set to 0. Otherwise,
* the deselect as part of the bus acquisition in mmc_scan() may fail
* during resume, as the bus isn't powered up again before later in
* mmc_go_discovery().
*/
err = mmc_acquire_bus(dev, dev);
if (err != 0)
return (err);
mmc_power_down(sc);
err = mmc_release_bus(dev, dev);
return (err);
}
static int
mmc_resume(device_t dev)
{
struct mmc_softc *sc = device_get_softc(dev);
mmc_scan(sc);
return (bus_generic_resume(dev));
}
static int
mmc_acquire_bus(device_t busdev, device_t dev)
{
struct mmc_softc *sc;
struct mmc_ivars *ivar;
int err;
uint16_t rca;
enum mmc_bus_timing timing;
err = MMCBR_ACQUIRE_HOST(device_get_parent(busdev), busdev);
if (err)
return (err);
sc = device_get_softc(busdev);
MMC_LOCK(sc);
if (sc->owner)
panic("mmc: host bridge didn't serialize us.");
sc->owner = dev;
MMC_UNLOCK(sc);
if (busdev != dev) {
/*
* Keep track of the last rca that we've selected. If
* we're asked to do it again, don't. We never
* unselect unless the bus code itself wants the mmc
* bus, and constantly reselecting causes problems.
*/
ivar = device_get_ivars(dev);
rca = ivar->rca;
if (sc->last_rca != rca) {
if (mmc_select_card(sc, rca) != MMC_ERR_NONE) {
device_printf(busdev, "Card at relative "
"address %d failed to select\n", rca);
return (ENXIO);
}
sc->last_rca = rca;
timing = mmcbr_get_timing(busdev);
/*
* For eMMC modes, setting/updating bus width and VCCQ
* only really is necessary if there actually is more
* than one device on the bus as generally that already
* had to be done by mmc_calculate_clock() or one of
* its calees. Moreover, setting the bus width anew
* can trigger re-tuning (via a CRC error on the next
* CMD), even if not switching between devices an the
* previously selected one is still tuned. Obviously,
* we need to re-tune the host controller if devices
* are actually switched, though.
*/
if (timing >= bus_timing_mmc_ddr52 &&
sc->child_count == 1)
return (0);
/* Prepare bus width for the new card. */
if (bootverbose || mmc_debug) {
device_printf(busdev,
"setting bus width to %d bits %s timing\n",
(ivar->bus_width == bus_width_4) ? 4 :
(ivar->bus_width == bus_width_8) ? 8 : 1,
mmc_timing_to_string(timing));
}
if (mmc_set_card_bus_width(sc, ivar, timing) !=
MMC_ERR_NONE) {
device_printf(busdev, "Card at relative "
"address %d failed to set bus width\n",
rca);
return (ENXIO);
}
mmcbr_set_bus_width(busdev, ivar->bus_width);
mmcbr_update_ios(busdev);
if (mmc_set_vccq(sc, ivar, timing) != MMC_ERR_NONE) {
device_printf(busdev, "Failed to set VCCQ "
"for card at relative address %d\n", rca);
return (ENXIO);
}
if (timing >= bus_timing_mmc_hs200 &&
mmc_retune(busdev, dev, true) != 0) {
device_printf(busdev, "Card at relative "
"address %d failed to re-tune\n", rca);
return (ENXIO);
}
}
} else {
/*
* If there's a card selected, stand down.
*/
if (sc->last_rca != 0) {
if (mmc_select_card(sc, 0) != MMC_ERR_NONE)
return (ENXIO);
sc->last_rca = 0;
}
}
return (0);
}
static int
mmc_release_bus(device_t busdev, device_t dev)
{
struct mmc_softc *sc;
int err;
sc = device_get_softc(busdev);
MMC_LOCK(sc);
if (!sc->owner)
panic("mmc: releasing unowned bus.");
if (sc->owner != dev)
panic("mmc: you don't own the bus. game over.");
MMC_UNLOCK(sc);
err = MMCBR_RELEASE_HOST(device_get_parent(busdev), busdev);
if (err)
return (err);
MMC_LOCK(sc);
sc->owner = NULL;
MMC_UNLOCK(sc);
return (0);
}
static uint32_t
mmc_select_vdd(struct mmc_softc *sc, uint32_t ocr)
{
return (ocr & MMC_OCR_VOLTAGE);
}
static int
mmc_highest_voltage(uint32_t ocr)
{
int i;
for (i = MMC_OCR_MAX_VOLTAGE_SHIFT;
i >= MMC_OCR_MIN_VOLTAGE_SHIFT; i--)
if (ocr & (1 << i))
return (i);
return (-1);
}
static void
mmc_wakeup(struct mmc_request *req)
{
struct mmc_softc *sc;
sc = (struct mmc_softc *)req->done_data;
MMC_LOCK(sc);
req->flags |= MMC_REQ_DONE;
MMC_UNLOCK(sc);
wakeup(req);
}
static int
mmc_wait_for_req(struct mmc_softc *sc, struct mmc_request *req)
{
req->done = mmc_wakeup;
req->done_data = sc;
if (__predict_false(mmc_debug > 1)) {
device_printf(sc->dev, "REQUEST: CMD%d arg %#x flags %#x",
req->cmd->opcode, req->cmd->arg, req->cmd->flags);
if (req->cmd->data) {
printf(" data %d\n", (int)req->cmd->data->len);
} else
printf("\n");
}
MMCBR_REQUEST(device_get_parent(sc->dev), sc->dev, req);
MMC_LOCK(sc);
while ((req->flags & MMC_REQ_DONE) == 0)
msleep(req, &sc->sc_mtx, 0, "mmcreq", 0);
MMC_UNLOCK(sc);
if (__predict_false(mmc_debug > 2 || (mmc_debug > 0 &&
req->cmd->error != MMC_ERR_NONE)))
device_printf(sc->dev, "CMD%d RESULT: %d\n",
req->cmd->opcode, req->cmd->error);
return (0);
}
static int
mmc_wait_for_request(device_t busdev, device_t dev, struct mmc_request *req)
{
struct mmc_softc *sc;
struct mmc_ivars *ivar;
int err, i;
enum mmc_retune_req retune_req;
sc = device_get_softc(busdev);
KASSERT(sc->owner != NULL,
("%s: Request from %s without bus being acquired.", __func__,
device_get_nameunit(dev)));
/*
* Unless no device is selected or re-tuning is already ongoing,
* execute re-tuning if a) the bridge is requesting to do so and
* re-tuning hasn't been otherwise paused, or b) if a child asked
* to be re-tuned prior to pausing (see also mmc_retune_pause()).
*/
if (__predict_false(sc->last_rca != 0 && sc->retune_ongoing == 0 &&
(((retune_req = mmcbr_get_retune_req(busdev)) != retune_req_none &&
sc->retune_paused == 0) || sc->retune_needed == 1))) {
if (__predict_false(mmc_debug > 1)) {
device_printf(busdev,
"Re-tuning with%s circuit reset required\n",
retune_req == retune_req_reset ? "" : "out");
}
if (device_get_parent(dev) == busdev)
ivar = device_get_ivars(dev);
else {
for (i = 0; i < sc->child_count; i++) {
ivar = device_get_ivars(sc->child_list[i]);
if (ivar->rca == sc->last_rca)
break;
}
if (ivar->rca != sc->last_rca)
return (EINVAL);
}
sc->retune_ongoing = 1;
err = mmc_retune(busdev, dev, retune_req == retune_req_reset);
sc->retune_ongoing = 0;
switch (err) {
case MMC_ERR_NONE:
case MMC_ERR_FAILED: /* Re-tune error but still might work */
break;
case MMC_ERR_BADCRC: /* Switch failure on HS400 recovery */
return (ENXIO);
case MMC_ERR_INVALID: /* Driver implementation b0rken */
default: /* Unknown error, should not happen */
return (EINVAL);
}
sc->retune_needed = 0;
}
return (mmc_wait_for_req(sc, req));
}
static int
mmc_wait_for_command(struct mmc_softc *sc, uint32_t opcode,
uint32_t arg, uint32_t flags, uint32_t *resp, int retries)
{
struct mmc_command cmd;
int err;
memset(&cmd, 0, sizeof(cmd));
cmd.opcode = opcode;
cmd.arg = arg;
cmd.flags = flags;
cmd.data = NULL;
err = mmc_wait_for_cmd(sc->dev, sc->dev, &cmd, retries);
if (err)
return (err);
if (resp) {
if (flags & MMC_RSP_136)
memcpy(resp, cmd.resp, 4 * sizeof(uint32_t));
else
*resp = cmd.resp[0];
}
return (0);
}
static void
mmc_idle_cards(struct mmc_softc *sc)
{
device_t dev;
struct mmc_command cmd;
dev = sc->dev;
mmcbr_set_chip_select(dev, cs_high);
mmcbr_update_ios(dev);
mmc_ms_delay(1);
memset(&cmd, 0, sizeof(cmd));
cmd.opcode = MMC_GO_IDLE_STATE;
cmd.arg = 0;
cmd.flags = MMC_RSP_NONE | MMC_CMD_BC;
cmd.data = NULL;
mmc_wait_for_cmd(sc->dev, sc->dev, &cmd, CMD_RETRIES);
mmc_ms_delay(1);
mmcbr_set_chip_select(dev, cs_dontcare);
mmcbr_update_ios(dev);
mmc_ms_delay(1);
}
static int
mmc_send_app_op_cond(struct mmc_softc *sc, uint32_t ocr, uint32_t *rocr)
{
struct mmc_command cmd;
int err = MMC_ERR_NONE, i;
memset(&cmd, 0, sizeof(cmd));
cmd.opcode = ACMD_SD_SEND_OP_COND;
cmd.arg = ocr;
cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR;
cmd.data = NULL;
for (i = 0; i < 1000; i++) {
err = mmc_wait_for_app_cmd(sc->dev, sc->dev, 0, &cmd,
CMD_RETRIES);
if (err != MMC_ERR_NONE)
break;
if ((cmd.resp[0] & MMC_OCR_CARD_BUSY) ||
(ocr & MMC_OCR_VOLTAGE) == 0)
break;
err = MMC_ERR_TIMEOUT;
mmc_ms_delay(10);
}
if (rocr && err == MMC_ERR_NONE)
*rocr = cmd.resp[0];
return (err);
}
static int
mmc_send_op_cond(struct mmc_softc *sc, uint32_t ocr, uint32_t *rocr)
{
struct mmc_command cmd;
int err = MMC_ERR_NONE, i;
memset(&cmd, 0, sizeof(cmd));
cmd.opcode = MMC_SEND_OP_COND;
cmd.arg = ocr;
cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR;
cmd.data = NULL;
for (i = 0; i < 1000; i++) {
err = mmc_wait_for_cmd(sc->dev, sc->dev, &cmd, CMD_RETRIES);
if (err != MMC_ERR_NONE)
break;
if ((cmd.resp[0] & MMC_OCR_CARD_BUSY) ||
(ocr & MMC_OCR_VOLTAGE) == 0)
break;
err = MMC_ERR_TIMEOUT;
mmc_ms_delay(10);
}
if (rocr && err == MMC_ERR_NONE)
*rocr = cmd.resp[0];
return (err);
}
static int
mmc_send_if_cond(struct mmc_softc *sc, uint8_t vhs)
{
struct mmc_command cmd;
int err;
memset(&cmd, 0, sizeof(cmd));
cmd.opcode = SD_SEND_IF_COND;
cmd.arg = (vhs << 8) + 0xAA;
cmd.flags = MMC_RSP_R7 | MMC_CMD_BCR;
cmd.data = NULL;
err = mmc_wait_for_cmd(sc->dev, sc->dev, &cmd, CMD_RETRIES);
return (err);
}
static void
mmc_power_up(struct mmc_softc *sc)
{
device_t dev;
enum mmc_vccq vccq;
dev = sc->dev;
mmcbr_set_vdd(dev, mmc_highest_voltage(mmcbr_get_host_ocr(dev)));
mmcbr_set_bus_mode(dev, opendrain);
mmcbr_set_chip_select(dev, cs_dontcare);
mmcbr_set_bus_width(dev, bus_width_1);
mmcbr_set_power_mode(dev, power_up);
mmcbr_set_clock(dev, 0);
mmcbr_update_ios(dev);
for (vccq = vccq_330; ; vccq--) {
mmcbr_set_vccq(dev, vccq);
if (mmcbr_switch_vccq(dev) == 0 || vccq == vccq_120)
break;
}
mmc_ms_delay(1);
mmcbr_set_clock(dev, SD_MMC_CARD_ID_FREQUENCY);
mmcbr_set_timing(dev, bus_timing_normal);
mmcbr_set_power_mode(dev, power_on);
mmcbr_update_ios(dev);
mmc_ms_delay(2);
}
static void
mmc_power_down(struct mmc_softc *sc)
{
device_t dev = sc->dev;
mmcbr_set_bus_mode(dev, opendrain);
mmcbr_set_chip_select(dev, cs_dontcare);
mmcbr_set_bus_width(dev, bus_width_1);
mmcbr_set_power_mode(dev, power_off);
mmcbr_set_clock(dev, 0);
mmcbr_set_timing(dev, bus_timing_normal);
mmcbr_update_ios(dev);
}
static int
mmc_select_card(struct mmc_softc *sc, uint16_t rca)
{
int err, flags;
flags = (rca ? MMC_RSP_R1B : MMC_RSP_NONE) | MMC_CMD_AC;
sc->retune_paused++;
err = mmc_wait_for_command(sc, MMC_SELECT_CARD, (uint32_t)rca << 16,
flags, NULL, CMD_RETRIES);
sc->retune_paused--;
return (err);
}
static int
mmc_sd_switch(struct mmc_softc *sc, uint8_t mode, uint8_t grp, uint8_t value,
uint8_t *res)
{
int err;
struct mmc_command cmd;
struct mmc_data data;
memset(&cmd, 0, sizeof(cmd));
memset(&data, 0, sizeof(data));
memset(res, 0, 64);
cmd.opcode = SD_SWITCH_FUNC;
cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
cmd.arg = mode << 31; /* 0 - check, 1 - set */
cmd.arg |= 0x00FFFFFF;
cmd.arg &= ~(0xF << (grp * 4));
cmd.arg |= value << (grp * 4);
cmd.data = &data;
data.data = res;
data.len = 64;
data.flags = MMC_DATA_READ;
err = mmc_wait_for_cmd(sc->dev, sc->dev, &cmd, CMD_RETRIES);
return (err);
}
static int
mmc_set_card_bus_width(struct mmc_softc *sc, struct mmc_ivars *ivar,
enum mmc_bus_timing timing)
{
struct mmc_command cmd;
int err;
uint8_t value;
if (mmcbr_get_mode(sc->dev) == mode_sd) {
memset(&cmd, 0, sizeof(cmd));
cmd.opcode = ACMD_SET_CLR_CARD_DETECT;
cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
cmd.arg = SD_CLR_CARD_DETECT;
err = mmc_wait_for_app_cmd(sc->dev, sc->dev, ivar->rca, &cmd,
CMD_RETRIES);
if (err != 0)
return (err);
memset(&cmd, 0, sizeof(cmd));
cmd.opcode = ACMD_SET_BUS_WIDTH;
cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
switch (ivar->bus_width) {
case bus_width_1:
cmd.arg = SD_BUS_WIDTH_1;
break;
case bus_width_4:
cmd.arg = SD_BUS_WIDTH_4;
break;
default:
return (MMC_ERR_INVALID);
}
err = mmc_wait_for_app_cmd(sc->dev, sc->dev, ivar->rca, &cmd,
CMD_RETRIES);
} else {
switch (ivar->bus_width) {
case bus_width_1:
if (timing == bus_timing_mmc_hs400 ||
timing == bus_timing_mmc_hs400es)
return (MMC_ERR_INVALID);
value = EXT_CSD_BUS_WIDTH_1;
break;
case bus_width_4:
switch (timing) {
case bus_timing_mmc_ddr52:
value = EXT_CSD_BUS_WIDTH_4_DDR;
break;
case bus_timing_mmc_hs400:
case bus_timing_mmc_hs400es:
return (MMC_ERR_INVALID);
default:
value = EXT_CSD_BUS_WIDTH_4;
break;
}
break;
case bus_width_8:
value = 0;
switch (timing) {
case bus_timing_mmc_hs400es:
value = EXT_CSD_BUS_WIDTH_ES;
/* FALLTHROUGH */
case bus_timing_mmc_ddr52:
case bus_timing_mmc_hs400:
value |= EXT_CSD_BUS_WIDTH_8_DDR;
break;
default:
value = EXT_CSD_BUS_WIDTH_8;
break;
}
break;
default:
return (MMC_ERR_INVALID);
}
err = mmc_switch(sc->dev, sc->dev, ivar->rca,
EXT_CSD_CMD_SET_NORMAL, EXT_CSD_BUS_WIDTH, value,
ivar->cmd6_time, true);
}
return (err);
}
static int
mmc_set_power_class(struct mmc_softc *sc, struct mmc_ivars *ivar)
{
device_t dev;
const uint8_t *ext_csd;
uint32_t clock;
uint8_t value;
dev = sc->dev;
if (mmcbr_get_mode(dev) != mode_mmc || ivar->csd.spec_vers < 4)
return (MMC_ERR_NONE);
value = 0;
ext_csd = ivar->raw_ext_csd;
clock = mmcbr_get_clock(dev);
switch (1 << mmcbr_get_vdd(dev)) {
case MMC_OCR_LOW_VOLTAGE:
if (clock <= MMC_TYPE_HS_26_MAX)
value = ext_csd[EXT_CSD_PWR_CL_26_195];
else if (clock <= MMC_TYPE_HS_52_MAX) {
if (mmcbr_get_timing(dev) >= bus_timing_mmc_ddr52 &&
ivar->bus_width >= bus_width_4)
value = ext_csd[EXT_CSD_PWR_CL_52_195_DDR];
else
value = ext_csd[EXT_CSD_PWR_CL_52_195];
} else if (clock <= MMC_TYPE_HS200_HS400ES_MAX)
value = ext_csd[EXT_CSD_PWR_CL_200_195];
break;
case MMC_OCR_270_280:
case MMC_OCR_280_290:
case MMC_OCR_290_300:
case MMC_OCR_300_310:
case MMC_OCR_310_320:
case MMC_OCR_320_330:
case MMC_OCR_330_340:
case MMC_OCR_340_350:
case MMC_OCR_350_360:
if (clock <= MMC_TYPE_HS_26_MAX)
value = ext_csd[EXT_CSD_PWR_CL_26_360];
else if (clock <= MMC_TYPE_HS_52_MAX) {
if (mmcbr_get_timing(dev) == bus_timing_mmc_ddr52 &&
ivar->bus_width >= bus_width_4)
value = ext_csd[EXT_CSD_PWR_CL_52_360_DDR];
else
value = ext_csd[EXT_CSD_PWR_CL_52_360];
} else if (clock <= MMC_TYPE_HS200_HS400ES_MAX) {
if (ivar->bus_width == bus_width_8)
value = ext_csd[EXT_CSD_PWR_CL_200_360_DDR];
else
value = ext_csd[EXT_CSD_PWR_CL_200_360];
}
break;
default:
device_printf(dev, "No power class support for VDD 0x%x\n",
1 << mmcbr_get_vdd(dev));
return (MMC_ERR_INVALID);
}
if (ivar->bus_width == bus_width_8)
value = (value & EXT_CSD_POWER_CLASS_8BIT_MASK) >>
EXT_CSD_POWER_CLASS_8BIT_SHIFT;
else
value = (value & EXT_CSD_POWER_CLASS_4BIT_MASK) >>
EXT_CSD_POWER_CLASS_4BIT_SHIFT;
if (value == 0)
return (MMC_ERR_NONE);
return (mmc_switch(dev, dev, ivar->rca, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_POWER_CLASS, value, ivar->cmd6_time, true));
}
static int
mmc_set_timing(struct mmc_softc *sc, struct mmc_ivars *ivar,
enum mmc_bus_timing timing)
{
u_char switch_res[64];
uint8_t value;
int err;
if (mmcbr_get_mode(sc->dev) == mode_sd) {
switch (timing) {
case bus_timing_normal:
value = SD_SWITCH_NORMAL_MODE;
break;
case bus_timing_hs:
value = SD_SWITCH_HS_MODE;
break;
default:
return (MMC_ERR_INVALID);
}
err = mmc_sd_switch(sc, SD_SWITCH_MODE_SET, SD_SWITCH_GROUP1,
value, switch_res);
if (err != MMC_ERR_NONE)
return (err);
if ((switch_res[16] & 0xf) != value)
return (MMC_ERR_FAILED);
mmcbr_set_timing(sc->dev, timing);
mmcbr_update_ios(sc->dev);
} else {
switch (timing) {
case bus_timing_normal:
value = EXT_CSD_HS_TIMING_BC;
break;
case bus_timing_hs:
case bus_timing_mmc_ddr52:
value = EXT_CSD_HS_TIMING_HS;
break;
case bus_timing_mmc_hs200:
value = EXT_CSD_HS_TIMING_HS200;
break;
case bus_timing_mmc_hs400:
case bus_timing_mmc_hs400es:
value = EXT_CSD_HS_TIMING_HS400;
break;
default:
return (MMC_ERR_INVALID);
}
err = mmc_switch(sc->dev, sc->dev, ivar->rca,
EXT_CSD_CMD_SET_NORMAL, EXT_CSD_HS_TIMING, value,
ivar->cmd6_time, false);
if (err != MMC_ERR_NONE)
return (err);
mmcbr_set_timing(sc->dev, timing);
mmcbr_update_ios(sc->dev);
err = mmc_switch_status(sc->dev, sc->dev, ivar->rca,
ivar->cmd6_time);
}
return (err);
}
static int
mmc_set_vccq(struct mmc_softc *sc, struct mmc_ivars *ivar,
enum mmc_bus_timing timing)
{
if (isset(&ivar->vccq_120, timing))
mmcbr_set_vccq(sc->dev, vccq_120);
else if (isset(&ivar->vccq_180, timing))
mmcbr_set_vccq(sc->dev, vccq_180);
else
mmcbr_set_vccq(sc->dev, vccq_330);
if (mmcbr_switch_vccq(sc->dev) != 0)
return (MMC_ERR_INVALID);
else
return (MMC_ERR_NONE);
}
static const uint8_t p8[8] = {
0x55, 0xAA, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
static const uint8_t p8ok[8] = {
0xAA, 0x55, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
static const uint8_t p4[4] = {
0x5A, 0x00, 0x00, 0x00
};
static const uint8_t p4ok[4] = {
0xA5, 0x00, 0x00, 0x00
};
static int
mmc_test_bus_width(struct mmc_softc *sc)
{
struct mmc_command cmd;
struct mmc_data data;
uint8_t buf[8];
int err;
if (mmcbr_get_caps(sc->dev) & MMC_CAP_8_BIT_DATA) {
mmcbr_set_bus_width(sc->dev, bus_width_8);
mmcbr_update_ios(sc->dev);
sc->squelched++; /* Errors are expected, squelch reporting. */