scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4);
scr->bus_widths = UNSTUFF_BITS(resp, 48, 4);
+ if (scr->sda_vsn == SCR_SPEC_VER_2)
+ /* Check if Physical Layer Spec v3.0 is supported */
+ scr->sda_spec3 = UNSTUFF_BITS(resp, 47, 1);
if (UNSTUFF_BITS(resp, 55, 1))
card->erased_byte = 0xFF;
status = kmalloc(64, GFP_KERNEL);
if (!status) {
printk(KERN_ERR "%s: could not allocate a buffer for "
- "switch capabilities.\n", mmc_hostname(card->host));
+ "switch capabilities.\n",
+ mmc_hostname(card->host));
return -ENOMEM;
}
+ /* Find out the supported Bus Speed Modes. */
err = mmc_sd_switch(card, 0, 0, 1, status);
if (err) {
- /* If the host or the card can't do the switch,
- * fail more gracefully. */
- if ((err != -EINVAL)
- && (err != -ENOSYS)
- && (err != -EFAULT))
+ /*
+ * If the host or the card can't do the switch,
+ * fail more gracefully.
+ */
+ if (err != -EINVAL && err != -ENOSYS && err != -EFAULT)
goto out;
- printk(KERN_WARNING "%s: problem reading switch "
- "capabilities, performance might suffer.\n",
+ printk(KERN_WARNING "%s: problem reading Bus Speed modes.\n",
mmc_hostname(card->host));
err = 0;
goto out;
}
- if (status[13] & 0x02)
- card->sw_caps.hs_max_dtr = 50000000;
+ if (card->scr.sda_spec3) {
+ card->sw_caps.sd3_bus_mode = status[13];
+
+ /* Find out Driver Strengths supported by the card */
+ err = mmc_sd_switch(card, 0, 2, 1, status);
+ if (err) {
+ /*
+ * If the host or the card can't do the switch,
+ * fail more gracefully.
+ */
+ if (err != -EINVAL && err != -ENOSYS && err != -EFAULT)
+ goto out;
+
+ printk(KERN_WARNING "%s: problem reading "
+ "Driver Strength.\n",
+ mmc_hostname(card->host));
+ err = 0;
+
+ goto out;
+ }
+
+ card->sw_caps.sd3_drv_type = status[9];
+
+ /* Find out Current Limits supported by the card */
+ err = mmc_sd_switch(card, 0, 3, 1, status);
+ if (err) {
+ /*
+ * If the host or the card can't do the switch,
+ * fail more gracefully.
+ */
+ if (err != -EINVAL && err != -ENOSYS && err != -EFAULT)
+ goto out;
+
+ printk(KERN_WARNING "%s: problem reading "
+ "Current Limit.\n",
+ mmc_hostname(card->host));
+ err = 0;
+
+ goto out;
+ }
+
+ card->sw_caps.sd3_curr_limit = status[7];
+ } else {
+ if (status[13] & 0x02)
+ card->sw_caps.hs_max_dtr = 50000000;
+ }
out:
kfree(status);
return err;
}
+static int sd_select_driver_type(struct mmc_card *card, u8 *status)
+{
+ int host_drv_type = 0, card_drv_type = 0;
+ int err;
+
+ /*
+ * If the host doesn't support any of the Driver Types A,C or D,
+ * default Driver Type B is used.
+ */
+ if (!(card->host->caps & (MMC_CAP_DRIVER_TYPE_A | MMC_CAP_DRIVER_TYPE_C
+ | MMC_CAP_DRIVER_TYPE_D)))
+ return 0;
+
+ if (card->host->caps & MMC_CAP_DRIVER_TYPE_A) {
+ host_drv_type = MMC_SET_DRIVER_TYPE_A;
+ if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_A)
+ card_drv_type = MMC_SET_DRIVER_TYPE_A;
+ else if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_B)
+ card_drv_type = MMC_SET_DRIVER_TYPE_B;
+ else if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_C)
+ card_drv_type = MMC_SET_DRIVER_TYPE_C;
+ } else if (card->host->caps & MMC_CAP_DRIVER_TYPE_C) {
+ host_drv_type = MMC_SET_DRIVER_TYPE_C;
+ if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_C)
+ card_drv_type = MMC_SET_DRIVER_TYPE_C;
+ } else if (!(card->host->caps & MMC_CAP_DRIVER_TYPE_D)) {
+ /*
+ * If we are here, that means only the default driver type
+ * B is supported by the host.
+ */
+ host_drv_type = MMC_SET_DRIVER_TYPE_B;
+ if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_B)
+ card_drv_type = MMC_SET_DRIVER_TYPE_B;
+ else if (card->sw_caps.sd3_drv_type & SD_DRIVER_TYPE_C)
+ card_drv_type = MMC_SET_DRIVER_TYPE_C;
+ }
+
+ err = mmc_sd_switch(card, 1, 2, card_drv_type, status);
+ if (err)
+ return err;
+
+ if ((status[15] & 0xF) != card_drv_type) {
+ printk(KERN_WARNING "%s: Problem setting driver strength!\n",
+ mmc_hostname(card->host));
+ return 0;
+ }
+
+ mmc_set_driver_type(card->host, host_drv_type);
+
+ return 0;
+}
+
+static int sd_set_bus_speed_mode(struct mmc_card *card, u8 *status)
+{
+ unsigned int bus_speed = 0, timing = 0;
+ int err;
+
+ /*
+ * If the host doesn't support any of the UHS-I modes, fallback on
+ * default speed.
+ */
+ if (!(card->host->caps & (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 |
+ MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_DDR50)))
+ return 0;
+
+ if ((card->host->caps & MMC_CAP_UHS_SDR104) &&
+ (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) {
+ bus_speed = UHS_SDR104_BUS_SPEED;
+ timing = MMC_TIMING_UHS_SDR104;
+ card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR;
+ } else if ((card->host->caps & MMC_CAP_UHS_DDR50) &&
+ (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) {
+ bus_speed = UHS_DDR50_BUS_SPEED;
+ timing = MMC_TIMING_UHS_DDR50;
+ card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR;
+ } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
+ MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode &
+ SD_MODE_UHS_SDR50)) {
+ bus_speed = UHS_SDR50_BUS_SPEED;
+ timing = MMC_TIMING_UHS_SDR50;
+ card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR;
+ } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
+ MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) &&
+ (card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) {
+ bus_speed = UHS_SDR25_BUS_SPEED;
+ timing = MMC_TIMING_UHS_SDR25;
+ card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR;
+ } else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
+ MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 |
+ MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode &
+ SD_MODE_UHS_SDR12)) {
+ bus_speed = UHS_SDR12_BUS_SPEED;
+ timing = MMC_TIMING_UHS_SDR12;
+ card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR;
+ }
+
+ card->sd_bus_speed = bus_speed;
+ err = mmc_sd_switch(card, 1, 0, bus_speed, status);
+ if (err)
+ return err;
+
+ if ((status[16] & 0xF) != bus_speed)
+ printk(KERN_WARNING "%s: Problem setting bus speed mode!\n",
+ mmc_hostname(card->host));
+ else {
+ mmc_set_timing(card->host, timing);
+ mmc_set_clock(card->host, card->sw_caps.uhs_max_dtr);
+ }
+
+ return 0;
+}
+
+static int sd_set_current_limit(struct mmc_card *card, u8 *status)
+{
+ int current_limit = 0;
+ int err;
+
+ /*
+ * Current limit switch is only defined for SDR50, SDR104, and DDR50
+ * bus speed modes. For other bus speed modes, we set the default
+ * current limit of 200mA.
+ */
+ if ((card->sd_bus_speed == UHS_SDR50_BUS_SPEED) ||
+ (card->sd_bus_speed == UHS_SDR104_BUS_SPEED) ||
+ (card->sd_bus_speed == UHS_DDR50_BUS_SPEED)) {
+ if (card->host->caps & MMC_CAP_MAX_CURRENT_800) {
+ if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_800)
+ current_limit = SD_SET_CURRENT_LIMIT_800;
+ else if (card->sw_caps.sd3_curr_limit &
+ SD_MAX_CURRENT_600)
+ current_limit = SD_SET_CURRENT_LIMIT_600;
+ else if (card->sw_caps.sd3_curr_limit &
+ SD_MAX_CURRENT_400)
+ current_limit = SD_SET_CURRENT_LIMIT_400;
+ else if (card->sw_caps.sd3_curr_limit &
+ SD_MAX_CURRENT_200)
+ current_limit = SD_SET_CURRENT_LIMIT_200;
+ } else if (card->host->caps & MMC_CAP_MAX_CURRENT_600) {
+ if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_600)
+ current_limit = SD_SET_CURRENT_LIMIT_600;
+ else if (card->sw_caps.sd3_curr_limit &
+ SD_MAX_CURRENT_400)
+ current_limit = SD_SET_CURRENT_LIMIT_400;
+ else if (card->sw_caps.sd3_curr_limit &
+ SD_MAX_CURRENT_200)
+ current_limit = SD_SET_CURRENT_LIMIT_200;
+ } else if (card->host->caps & MMC_CAP_MAX_CURRENT_400) {
+ if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_400)
+ current_limit = SD_SET_CURRENT_LIMIT_400;
+ else if (card->sw_caps.sd3_curr_limit &
+ SD_MAX_CURRENT_200)
+ current_limit = SD_SET_CURRENT_LIMIT_200;
+ } else if (card->host->caps & MMC_CAP_MAX_CURRENT_200) {
+ if (card->sw_caps.sd3_curr_limit & SD_MAX_CURRENT_200)
+ current_limit = SD_SET_CURRENT_LIMIT_200;
+ }
+ } else
+ current_limit = SD_SET_CURRENT_LIMIT_200;
+
+ err = mmc_sd_switch(card, 1, 3, current_limit, status);
+ if (err)
+ return err;
+
+ if (((status[15] >> 4) & 0x0F) != current_limit)
+ printk(KERN_WARNING "%s: Problem setting current limit!\n",
+ mmc_hostname(card->host));
+
+ return 0;
+}
+
+/*
+ * UHS-I specific initialization procedure
+ */
+static int mmc_sd_init_uhs_card(struct mmc_card *card)
+{
+ int err;
+ u8 *status;
+
+ if (!card->scr.sda_spec3)
+ return 0;
+
+ if (!(card->csd.cmdclass & CCC_SWITCH))
+ return 0;
+
+ status = kmalloc(64, GFP_KERNEL);
+ if (!status) {
+ printk(KERN_ERR "%s: could not allocate a buffer for "
+ "switch capabilities.\n", mmc_hostname(card->host));
+ return -ENOMEM;
+ }
+
+ /* Set 4-bit bus width */
+ if ((card->host->caps & MMC_CAP_4_BIT_DATA) &&
+ (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
+ err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
+ if (err)
+ goto out;
+
+ mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
+ }
+
+ /* Set the driver strength for the card */
+ err = sd_select_driver_type(card, status);
+ if (err)
+ goto out;
+
+ /* Set bus speed mode of the card */
+ err = sd_set_bus_speed_mode(card, status);
+ if (err)
+ goto out;
+
+ /* Set current limit for the card */
+ err = sd_set_current_limit(card, status);
+
+out:
+ kfree(status);
+
+ return err;
+}
+
MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
card->raw_cid[2], card->raw_cid[3]);
MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
/*
* Fetch CID from card.
*/
-int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid)
+int mmc_sd_get_cid(struct mmc_host *host, u32 ocr, u32 *cid, u32 *rocr)
{
int err;
*/
err = mmc_send_if_cond(host, ocr);
if (!err)
- ocr |= 1 << 30;
+ ocr |= SD_OCR_CCS;
+
+ /*
+ * If the host supports one of UHS-I modes, request the card
+ * to switch to 1.8V signaling level.
+ */
+ if (host->caps & (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 |
+ MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 | MMC_CAP_UHS_DDR50))
+ ocr |= SD_OCR_S18R;
- err = mmc_send_app_op_cond(host, ocr, NULL);
+ /* If the host can supply more than 150mA, XPC should be set to 1. */
+ if (host->caps & (MMC_CAP_SET_XPC_330 | MMC_CAP_SET_XPC_300 |
+ MMC_CAP_SET_XPC_180))
+ ocr |= SD_OCR_XPC;
+
+try_again:
+ err = mmc_send_app_op_cond(host, ocr, rocr);
if (err)
return err;
+ /*
+ * In case CCS and S18A in the response is set, start Signal Voltage
+ * Switch procedure. SPI mode doesn't support CMD11.
+ */
+ if (!mmc_host_is_spi(host) && rocr &&
+ ((*rocr & 0x41000000) == 0x41000000)) {
+ err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180);
+ if (err) {
+ ocr &= ~SD_OCR_S18R;
+ goto try_again;
+ }
+ }
+
if (mmc_host_is_spi(host))
err = mmc_send_cid(host, cid);
else
struct mmc_card *card;
int err;
u32 cid[4];
+ u32 rocr = 0;
BUG_ON(!host);
WARN_ON(!host->claimed);
- err = mmc_sd_get_cid(host, ocr, cid);
+ err = mmc_sd_get_cid(host, ocr, cid, &rocr);
if (err)
return err;
if (err)
goto free_card;
- /*
- * Attempt to change to high-speed (if supported)
- */
- err = mmc_sd_switch_hs(card);
- if (err > 0)
- mmc_sd_go_highspeed(card);
- else if (err)
- goto free_card;
-
- /*
- * Set bus speed.
- */
- mmc_set_clock(host, mmc_sd_get_max_clock(card));
-
- /*
- * Switch to wider bus (if supported).
- */
- if ((host->caps & MMC_CAP_4_BIT_DATA) &&
- (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
- err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
+ /* Initialization sequence for UHS-I cards */
+ if (rocr & SD_ROCR_S18A) {
+ err = mmc_sd_init_uhs_card(card);
if (err)
goto free_card;
+ } else {
+ /*
+ * Attempt to change to high-speed (if supported)
+ */
+ err = mmc_sd_switch_hs(card);
+ if (err > 0)
+ mmc_sd_go_highspeed(card);
+ else if (err)
+ goto free_card;
- mmc_set_bus_width(host, MMC_BUS_WIDTH_4);
+ /*
+ * Set bus speed.
+ */
+ mmc_set_clock(host, mmc_sd_get_max_clock(card));
+
+ /*
+ * Switch to wider bus (if supported).
+ */
+ if ((host->caps & MMC_CAP_4_BIT_DATA) &&
+ (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
+ err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
+ if (err)
+ goto free_card;
+
+ mmc_set_bus_width(host, MMC_BUS_WIDTH_4);
+ }
}
host->card = card;
BUG_ON(!host);
WARN_ON(!host->claimed);
+ /* Make sure we are at 3.3V signalling voltage */
+ err = mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330);
+ if (err)
+ return err;
+
err = mmc_send_app_op_cond(host, 0, &ocr);
if (err)
return err;
git.openpandora.org / pandora-kernel.git / blobdiff