static int mmc_set_signal_voltage(struct mmc *mmc, uint signal_voltage);
static int mmc_power_cycle(struct mmc *mmc);
+static int mmc_select_mode_and_width(struct mmc *mmc, uint card_caps);
#if CONFIG_IS_ENABLED(MMC_TINY)
static struct mmc mmc_static;
#endif
#if !CONFIG_IS_ENABLED(DM_MMC)
+
+static int mmc_wait_dat0(struct mmc *mmc, int state, int timeout)
+{
+ return -ENOSYS;
+}
+
__weak int board_mmc_getwp(struct mmc *mmc)
{
return -1;
int mmc_set_blocklen(struct mmc *mmc, int len)
{
struct mmc_cmd cmd;
+ int err;
if (mmc->ddr_mode)
return 0;
cmd.resp_type = MMC_RSP_R1;
cmd.cmdarg = len;
- return mmc_send_cmd(mmc, &cmd, NULL);
+ err = mmc_send_cmd(mmc, &cmd, NULL);
+
+#ifdef CONFIG_MMC_QUIRKS
+ if (err && (mmc->quirks & MMC_QUIRK_RETRY_SET_BLOCKLEN)) {
+ int retries = 4;
+ /*
+ * It has been seen that SET_BLOCKLEN may fail on the first
+ * attempt, let's try a few more time
+ */
+ do {
+ err = mmc_send_cmd(mmc, &cmd, NULL);
+ if (!err)
+ break;
+ } while (retries--);
+ }
+#endif
+
+ return err;
}
static int mmc_read_blocks(struct mmc *mmc, void *dst, lbaint_t start,
return 0;
}
-static int sd_send_op_cond(struct mmc *mmc)
+static int mmc_switch_voltage(struct mmc *mmc, int signal_voltage)
+{
+ struct mmc_cmd cmd;
+ int err = 0;
+
+ /*
+ * Send CMD11 only if the request is to switch the card to
+ * 1.8V signalling.
+ */
+ if (signal_voltage == MMC_SIGNAL_VOLTAGE_330)
+ return mmc_set_signal_voltage(mmc, signal_voltage);
+
+ cmd.cmdidx = SD_CMD_SWITCH_UHS18V;
+ cmd.cmdarg = 0;
+ cmd.resp_type = MMC_RSP_R1;
+
+ err = mmc_send_cmd(mmc, &cmd, NULL);
+ if (err)
+ return err;
+
+ if (!mmc_host_is_spi(mmc) && (cmd.response[0] & MMC_STATUS_ERROR))
+ return -EIO;
+
+ /*
+ * The card should drive cmd and dat[0:3] low immediately
+ * after the response of cmd11, but wait 100 us to be sure
+ */
+ err = mmc_wait_dat0(mmc, 0, 100);
+ if (err == -ENOSYS)
+ udelay(100);
+ else if (err)
+ return -ETIMEDOUT;
+
+ /*
+ * During a signal voltage level switch, the clock must be gated
+ * for 5 ms according to the SD spec
+ */
+ mmc_set_clock(mmc, mmc->clock, true);
+
+ err = mmc_set_signal_voltage(mmc, signal_voltage);
+ if (err)
+ return err;
+
+ /* Keep clock gated for at least 10 ms, though spec only says 5 ms */
+ mdelay(10);
+ mmc_set_clock(mmc, mmc->clock, false);
+
+ /*
+ * Failure to switch is indicated by the card holding
+ * dat[0:3] low. Wait for at least 1 ms according to spec
+ */
+ err = mmc_wait_dat0(mmc, 1, 1000);
+ if (err == -ENOSYS)
+ udelay(1000);
+ else if (err)
+ return -ETIMEDOUT;
+
+ return 0;
+}
+
+static int sd_send_op_cond(struct mmc *mmc, bool uhs_en)
{
int timeout = 1000;
int err;
if (mmc->version == SD_VERSION_2)
cmd.cmdarg |= OCR_HCS;
+ if (uhs_en)
+ cmd.cmdarg |= OCR_S18R;
+
err = mmc_send_cmd(mmc, &cmd, NULL);
if (err)
mmc->ocr = cmd.response[0];
+ if (uhs_en && !(mmc_host_is_spi(mmc)) && (cmd.response[0] & 0x41000000)
+ == 0x41000000) {
+ err = mmc_switch_voltage(mmc, MMC_SIGNAL_VOLTAGE_180);
+ if (err)
+ return err;
+ }
+
mmc->high_capacity = ((mmc->ocr & OCR_HCS) == OCR_HCS);
mmc->rca = 0;
case MMC_HS_52:
case MMC_DDR_52:
speed_bits = EXT_CSD_TIMING_HS;
+ break;
+ case MMC_HS_200:
+ speed_bits = EXT_CSD_TIMING_HS200;
+ break;
case MMC_LEGACY:
speed_bits = EXT_CSD_TIMING_LEGACY;
break;
mmc->card_caps |= MMC_MODE_4BIT | MMC_MODE_8BIT;
- cardtype = ext_csd[EXT_CSD_CARD_TYPE] & 0xf;
+ cardtype = ext_csd[EXT_CSD_CARD_TYPE] & 0x3f;
+ mmc->cardtype = cardtype;
- /* High Speed is set, there are two types: 52MHz and 26MHz */
+ if (cardtype & (EXT_CSD_CARD_TYPE_HS200_1_2V |
+ EXT_CSD_CARD_TYPE_HS200_1_8V)) {
+ mmc->card_caps |= MMC_MODE_HS200;
+ }
if (cardtype & EXT_CSD_CARD_TYPE_52) {
if (cardtype & EXT_CSD_CARD_TYPE_DDR_52)
mmc->card_caps |= MMC_MODE_DDR_52MHz;
return 0;
}
+static int mmc_boot_part_access_chk(struct mmc *mmc, unsigned int part_num)
+{
+ int forbidden = 0;
+ bool change = false;
+
+ if (part_num & PART_ACCESS_MASK)
+ forbidden = MMC_CAP(MMC_HS_200);
+
+ if (MMC_CAP(mmc->selected_mode) & forbidden) {
+ debug("selected mode (%s) is forbidden for part %d\n",
+ mmc_mode_name(mmc->selected_mode), part_num);
+ change = true;
+ } else if (mmc->selected_mode != mmc->best_mode) {
+ debug("selected mode is not optimal\n");
+ change = true;
+ }
+
+ if (change)
+ return mmc_select_mode_and_width(mmc,
+ mmc->card_caps & ~forbidden);
+
+ return 0;
+}
+
int mmc_switch_part(struct mmc *mmc, unsigned int part_num)
{
int ret;
+ ret = mmc_boot_part_access_chk(mmc, part_num);
+ if (ret)
+ return ret;
+
ret = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONF,
(mmc->part_config & ~PART_ACCESS_MASK)
| (part_num & PART_ACCESS_MASK));
ALLOC_CACHE_ALIGN_BUFFER(__be32, switch_status, 16);
struct mmc_data data;
int timeout;
+ u32 sd3_bus_mode;
mmc->card_caps = MMC_MODE_1BIT;
if (__be32_to_cpu(switch_status[3]) & SD_HIGHSPEED_SUPPORTED)
mmc->card_caps |= MMC_CAP(SD_HS);
+ /* Version before 3.0 don't support UHS modes */
+ if (mmc->version < SD_VERSION_3)
+ return 0;
+
+ sd3_bus_mode = __be32_to_cpu(switch_status[3]) >> 16 & 0x1f;
+ if (sd3_bus_mode & SD_MODE_UHS_SDR104)
+ mmc->card_caps |= MMC_CAP(UHS_SDR104);
+ if (sd3_bus_mode & SD_MODE_UHS_SDR50)
+ mmc->card_caps |= MMC_CAP(UHS_SDR50);
+ if (sd3_bus_mode & SD_MODE_UHS_SDR25)
+ mmc->card_caps |= MMC_CAP(UHS_SDR25);
+ if (sd3_bus_mode & SD_MODE_UHS_SDR12)
+ mmc->card_caps |= MMC_CAP(UHS_SDR12);
+ if (sd3_bus_mode & SD_MODE_UHS_DDR50)
+ mmc->card_caps |= MMC_CAP(UHS_DDR50);
+
return 0;
}
int err;
ALLOC_CACHE_ALIGN_BUFFER(uint, switch_status, 16);
+ int speed;
- err = sd_switch(mmc, SD_SWITCH_SWITCH, 0, 1, (u8 *)switch_status);
+ switch (mode) {
+ case SD_LEGACY:
+ case UHS_SDR12:
+ speed = UHS_SDR12_BUS_SPEED;
+ break;
+ case SD_HS:
+ case UHS_SDR25:
+ speed = UHS_SDR25_BUS_SPEED;
+ break;
+ case UHS_SDR50:
+ speed = UHS_SDR50_BUS_SPEED;
+ break;
+ case UHS_DDR50:
+ speed = UHS_DDR50_BUS_SPEED;
+ break;
+ case UHS_SDR104:
+ speed = UHS_SDR104_BUS_SPEED;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ err = sd_switch(mmc, SD_SWITCH_SWITCH, 0, speed, (u8 *)switch_status);
if (err)
return err;
- if ((__be32_to_cpu(switch_status[4]) & 0x0f000000) != 0x01000000)
+ if ((__be32_to_cpu(switch_status[4]) >> 24) != speed)
return -ENOTSUPP;
return 0;
}
#if !CONFIG_IS_ENABLED(DM_MMC)
+static int mmc_execute_tuning(struct mmc *mmc, uint opcode)
+{
+ return -ENOTSUPP;
+}
+
static void mmc_send_init_stream(struct mmc *mmc)
{
}
struct mode_width_tuning {
enum bus_mode mode;
uint widths;
+ uint tuning;
};
+int mmc_voltage_to_mv(enum mmc_voltage voltage)
+{
+ switch (voltage) {
+ case MMC_SIGNAL_VOLTAGE_000: return 0;
+ case MMC_SIGNAL_VOLTAGE_330: return 3300;
+ case MMC_SIGNAL_VOLTAGE_180: return 1800;
+ case MMC_SIGNAL_VOLTAGE_120: return 1200;
+ }
+ return -EINVAL;
+}
+
static int mmc_set_signal_voltage(struct mmc *mmc, uint signal_voltage)
{
+ int err;
+
+ if (mmc->signal_voltage == signal_voltage)
+ return 0;
+
mmc->signal_voltage = signal_voltage;
- return mmc_set_ios(mmc);
+ err = mmc_set_ios(mmc);
+ if (err)
+ debug("unable to set voltage (err %d)\n", err);
+
+ return err;
}
static const struct mode_width_tuning sd_modes_by_pref[] = {
+ {
+ .mode = UHS_SDR104,
+ .widths = MMC_MODE_4BIT | MMC_MODE_1BIT,
+ .tuning = MMC_CMD_SEND_TUNING_BLOCK
+ },
+ {
+ .mode = UHS_SDR50,
+ .widths = MMC_MODE_4BIT | MMC_MODE_1BIT,
+ },
+ {
+ .mode = UHS_DDR50,
+ .widths = MMC_MODE_4BIT | MMC_MODE_1BIT,
+ },
+ {
+ .mode = UHS_SDR25,
+ .widths = MMC_MODE_4BIT | MMC_MODE_1BIT,
+ },
{
.mode = SD_HS,
.widths = MMC_MODE_4BIT | MMC_MODE_1BIT,
},
+ {
+ .mode = UHS_SDR12,
+ .widths = MMC_MODE_4BIT | MMC_MODE_1BIT,
+ },
{
.mode = SD_LEGACY,
.widths = MMC_MODE_4BIT | MMC_MODE_1BIT,
mwt++) \
if (caps & MMC_CAP(mwt->mode))
-static int sd_select_mode_and_width(struct mmc *mmc)
+static int sd_select_mode_and_width(struct mmc *mmc, uint card_caps)
{
int err;
uint widths[] = {MMC_MODE_4BIT, MMC_MODE_1BIT};
const struct mode_width_tuning *mwt;
+ bool uhs_en = (mmc->ocr & OCR_S18R) ? true : false;
+ uint caps;
+
- err = sd_get_capabilities(mmc);
- if (err)
- return err;
/* Restrict card's capabilities by what the host can do */
- mmc->card_caps &= (mmc->cfg->host_caps | MMC_MODE_1BIT);
+ caps = card_caps & (mmc->host_caps | MMC_MODE_1BIT);
+
+ if (!uhs_en)
+ caps &= ~UHS_CAPS;
- for_each_sd_mode_by_pref(mmc->card_caps, mwt) {
+ for_each_sd_mode_by_pref(caps, mwt) {
uint *w;
for (w = widths; w < widths + ARRAY_SIZE(widths); w++) {
- if (*w & mmc->card_caps & mwt->widths) {
+ if (*w & caps & mwt->widths) {
debug("trying mode %s width %d (at %d MHz)\n",
mmc_mode_name(mwt->mode),
bus_width(*w),
mmc_select_mode(mmc, mwt->mode);
mmc_set_clock(mmc, mmc->tran_speed, false);
+ /* execute tuning if needed */
+ if (mwt->tuning && !mmc_host_is_spi(mmc)) {
+ err = mmc_execute_tuning(mmc,
+ mwt->tuning);
+ if (err) {
+ debug("tuning failed\n");
+ goto error;
+ }
+ }
+
err = sd_read_ssr(mmc);
if (!err)
return 0;
return -EBADMSG;
}
+static int mmc_set_lowest_voltage(struct mmc *mmc, enum bus_mode mode,
+ uint32_t allowed_mask)
+{
+ u32 card_mask = 0;
+
+ switch (mode) {
+ case MMC_HS_200:
+ if (mmc->cardtype & EXT_CSD_CARD_TYPE_HS200_1_8V)
+ card_mask |= MMC_SIGNAL_VOLTAGE_180;
+ if (mmc->cardtype & EXT_CSD_CARD_TYPE_HS200_1_2V)
+ card_mask |= MMC_SIGNAL_VOLTAGE_120;
+ break;
+ case MMC_DDR_52:
+ if (mmc->cardtype & EXT_CSD_CARD_TYPE_DDR_1_8V)
+ card_mask |= MMC_SIGNAL_VOLTAGE_330 |
+ MMC_SIGNAL_VOLTAGE_180;
+ if (mmc->cardtype & EXT_CSD_CARD_TYPE_DDR_1_2V)
+ card_mask |= MMC_SIGNAL_VOLTAGE_120;
+ break;
+ default:
+ card_mask |= MMC_SIGNAL_VOLTAGE_330;
+ break;
+ }
+
+ while (card_mask & allowed_mask) {
+ enum mmc_voltage best_match;
+
+ best_match = 1 << (ffs(card_mask & allowed_mask) - 1);
+ if (!mmc_set_signal_voltage(mmc, best_match))
+ return 0;
+
+ allowed_mask &= ~best_match;
+ }
+
+ return -ENOTSUPP;
+}
+
static const struct mode_width_tuning mmc_modes_by_pref[] = {
{
.mode = MMC_HS_200,
.widths = MMC_MODE_8BIT | MMC_MODE_4BIT,
+ .tuning = MMC_CMD_SEND_TUNING_BLOCK_HS200
},
{
.mode = MMC_DDR_52,
ecbv++) \
if ((ddr == ecbv->is_ddr) && (caps & ecbv->cap))
-static int mmc_select_mode_and_width(struct mmc *mmc)
+static int mmc_select_mode_and_width(struct mmc *mmc, uint card_caps)
{
int err;
const struct mode_width_tuning *mwt;
const struct ext_csd_bus_width *ecbw;
- err = mmc_get_capabilities(mmc);
- if (err)
- return err;
-
/* Restrict card's capabilities by what the host can do */
- mmc->card_caps &= (mmc->cfg->host_caps | MMC_MODE_1BIT);
+ card_caps &= (mmc->host_caps | MMC_MODE_1BIT);
/* Only version 4 of MMC supports wider bus widths */
if (mmc->version < MMC_VERSION_4)
return -ENOTSUPP;
}
- for_each_mmc_mode_by_pref(mmc->card_caps, mwt) {
- for_each_supported_width(mmc->card_caps & mwt->widths,
+ mmc_set_clock(mmc, mmc->legacy_speed, false);
+
+ for_each_mmc_mode_by_pref(card_caps, mwt) {
+ for_each_supported_width(card_caps & mwt->widths,
mmc_is_mode_ddr(mwt->mode), ecbw) {
+ enum mmc_voltage old_voltage;
debug("trying mode %s width %d (at %d MHz)\n",
mmc_mode_name(mwt->mode),
bus_width(ecbw->cap),
mmc_mode2freq(mmc, mwt->mode) / 1000000);
+ old_voltage = mmc->signal_voltage;
+ err = mmc_set_lowest_voltage(mmc, mwt->mode,
+ MMC_ALL_SIGNAL_VOLTAGE);
+ if (err)
+ continue;
+
/* configure the bus width (card + host) */
err = mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_BUS_WIDTH,
mmc_select_mode(mmc, mwt->mode);
mmc_set_clock(mmc, mmc->tran_speed, false);
+ /* execute tuning if needed */
+ if (mwt->tuning) {
+ err = mmc_execute_tuning(mmc, mwt->tuning);
+ if (err) {
+ debug("tuning failed\n");
+ goto error;
+ }
+ }
+
/* do a transfer to check the configuration */
err = mmc_read_and_compare_ext_csd(mmc);
if (!err)
return 0;
error:
+ mmc_set_signal_voltage(mmc, old_voltage);
/* if an error occured, revert to a safer bus mode */
mmc_switch(mmc, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_BUS_WIDTH, EXT_CSD_BUS_WIDTH_1);
cmd.resp_type = MMC_RSP_R1;
cmd.cmdarg = 1;
err = mmc_send_cmd(mmc, &cmd, NULL);
-
if (err)
return err;
}
err = mmc_send_cmd(mmc, &cmd, NULL);
+#ifdef CONFIG_MMC_QUIRKS
+ if (err && (mmc->quirks & MMC_QUIRK_RETRY_SEND_CID)) {
+ int retries = 4;
+ /*
+ * It has been seen that SEND_CID may fail on the first
+ * attempt, let's try a few more time
+ */
+ do {
+ err = mmc_send_cmd(mmc, &cmd, NULL);
+ if (!err)
+ break;
+ } while (retries--);
+ }
+#endif
+
if (err)
return err;
if (err)
return err;
- if (IS_SD(mmc))
- err = sd_select_mode_and_width(mmc);
- else
- err = mmc_select_mode_and_width(mmc);
+ if (IS_SD(mmc)) {
+ err = sd_get_capabilities(mmc);
+ if (err)
+ return err;
+ err = sd_select_mode_and_width(mmc, mmc->card_caps);
+ } else {
+ err = mmc_get_capabilities(mmc);
+ if (err)
+ return err;
+ mmc_select_mode_and_width(mmc, mmc->card_caps);
+ }
if (err)
return err;
+ mmc->best_mode = mmc->selected_mode;
/* Fix the block length for DDR mode */
if (mmc->ddr_mode) {
static int mmc_power_off(struct mmc *mmc)
{
+ mmc_set_clock(mmc, 1, true);
#if CONFIG_IS_ENABLED(DM_MMC) && CONFIG_IS_ENABLED(DM_REGULATOR)
if (mmc->vmmc_supply) {
int ret = regulator_set_enable(mmc->vmmc_supply, false);
if (ret) {
- puts("Error disabling VMMC supply\n");
+ debug("Error disabling VMMC supply\n");
return ret;
}
}
int mmc_start_init(struct mmc *mmc)
{
bool no_card;
+ bool uhs_en = supports_uhs(mmc->cfg->host_caps);
int err;
+ mmc->host_caps = mmc->cfg->host_caps;
+
/* we pretend there's no card when init is NULL */
no_card = mmc_getcd(mmc) == 0;
#if !CONFIG_IS_ENABLED(DM_MMC)
if (err)
return err;
- err = mmc_power_on(mmc);
+#ifdef CONFIG_MMC_QUIRKS
+ mmc->quirks = MMC_QUIRK_RETRY_SET_BLOCKLEN |
+ MMC_QUIRK_RETRY_SEND_CID;
+#endif
+
+ err = mmc_power_cycle(mmc);
+ if (err) {
+ /*
+ * if power cycling is not supported, we should not try
+ * to use the UHS modes, because we wouldn't be able to
+ * recover from an error during the UHS initialization.
+ */
+ debug("Unable to do a full power cycle. Disabling the UHS modes for safety\n");
+ uhs_en = false;
+ mmc->host_caps &= ~UHS_CAPS;
+ err = mmc_power_on(mmc);
+ }
if (err)
return err;
#endif
mmc->ddr_mode = 0;
+retry:
mmc_set_initial_state(mmc);
mmc_send_init_stream(mmc);
err = mmc_send_if_cond(mmc);
/* Now try to get the SD card's operating condition */
- err = sd_send_op_cond(mmc);
+ err = sd_send_op_cond(mmc, uhs_en);
+ if (err && uhs_en) {
+ uhs_en = false;
+ mmc_power_cycle(mmc);
+ goto retry;
+ }
/* If the command timed out, we check for an MMC card */
if (err == -ETIMEDOUT) {
projects / people / ms / u-boot.git / blobdiff