#include <linux/err.h>
#include <linux/slab.h>
+#include <linux/stat.h>
#include <linux/mmc/host.h>
#include <linux/mmc/card.h>
break;
default:
- printk(KERN_ERR "%s: card has unknown MMCA version %d\n",
+ pr_err("%s: card has unknown MMCA version %d\n",
mmc_hostname(card->host), card->csd.mmca_vsn);
return -EINVAL;
}
*/
csd->structure = UNSTUFF_BITS(resp, 126, 2);
if (csd->structure == 0) {
- printk(KERN_ERR "%s: unrecognised CSD structure version %d\n",
+ pr_err("%s: unrecognised CSD structure version %d\n",
mmc_hostname(card->host), csd->structure);
return -EINVAL;
}
*/
ext_csd = kmalloc(512, GFP_KERNEL);
if (!ext_csd) {
- printk(KERN_ERR "%s: could not allocate a buffer to "
+ pr_err("%s: could not allocate a buffer to "
"receive the ext_csd.\n", mmc_hostname(card->host));
return -ENOMEM;
}
* stored in their CSD.
*/
if (card->csd.capacity == (4096 * 512)) {
- printk(KERN_ERR "%s: unable to read EXT_CSD "
+ pr_err("%s: unable to read EXT_CSD "
"on a possible high capacity card. "
"Card will be ignored.\n",
mmc_hostname(card->host));
} else {
- printk(KERN_WARNING "%s: unable to read "
+ pr_warning("%s: unable to read "
"EXT_CSD, performance might "
"suffer.\n",
mmc_hostname(card->host));
*/
static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
{
- int err = 0;
+ int err = 0, idx;
+ unsigned int part_size;
+ u8 hc_erase_grp_sz = 0, hc_wp_grp_sz = 0;
BUG_ON(!card);
card->ext_csd.raw_ext_csd_structure = ext_csd[EXT_CSD_STRUCTURE];
if (card->csd.structure == 3) {
if (card->ext_csd.raw_ext_csd_structure > 2) {
- printk(KERN_ERR "%s: unrecognised EXT_CSD structure "
+ pr_err("%s: unrecognised EXT_CSD structure "
"version %d\n", mmc_hostname(card->host),
card->ext_csd.raw_ext_csd_structure);
err = -EINVAL;
card->ext_csd.rev = ext_csd[EXT_CSD_REV];
if (card->ext_csd.rev > 6) {
- printk(KERN_ERR "%s: unrecognised EXT_CSD revision %d\n",
+ pr_err("%s: unrecognised EXT_CSD revision %d\n",
mmc_hostname(card->host), card->ext_csd.rev);
err = -EINVAL;
goto out;
break;
default:
/* MMC v4 spec says this cannot happen */
- printk(KERN_WARNING "%s: card is mmc v4 but doesn't "
+ pr_warning("%s: card is mmc v4 but doesn't "
"support any high-speed modes.\n",
mmc_hostname(card->host));
}
* There are two boot regions of equal size, defined in
* multiples of 128K.
*/
- card->ext_csd.boot_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
+ if (ext_csd[EXT_CSD_BOOT_MULT] && mmc_boot_partition_access(card->host)) {
+ for (idx = 0; idx < MMC_NUM_BOOT_PARTITION; idx++) {
+ part_size = ext_csd[EXT_CSD_BOOT_MULT] << 17;
+ mmc_part_add(card, part_size,
+ EXT_CSD_PART_CONFIG_ACC_BOOT0 + idx,
+ "boot%d", idx, true);
+ }
+ }
}
card->ext_csd.raw_hc_erase_gap_size =
* card has the Enhanced area enabled. If so, export enhanced
* area offset and size to user by adding sysfs interface.
*/
+ card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT];
if ((ext_csd[EXT_CSD_PARTITION_SUPPORT] & 0x2) &&
(ext_csd[EXT_CSD_PARTITION_ATTRIBUTE] & 0x1)) {
- u8 hc_erase_grp_sz =
+ hc_erase_grp_sz =
ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
- u8 hc_wp_grp_sz =
+ hc_wp_grp_sz =
ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
card->ext_csd.enhanced_area_en = 1;
card->ext_csd.enhanced_area_offset = -EINVAL;
card->ext_csd.enhanced_area_size = -EINVAL;
}
+
+ /*
+ * General purpose partition feature support --
+ * If ext_csd has the size of general purpose partitions,
+ * set size, part_cfg, partition name in mmc_part.
+ */
+ if (ext_csd[EXT_CSD_PARTITION_SUPPORT] &
+ EXT_CSD_PART_SUPPORT_PART_EN) {
+ if (card->ext_csd.enhanced_area_en != 1) {
+ hc_erase_grp_sz =
+ ext_csd[EXT_CSD_HC_ERASE_GRP_SIZE];
+ hc_wp_grp_sz =
+ ext_csd[EXT_CSD_HC_WP_GRP_SIZE];
+
+ card->ext_csd.enhanced_area_en = 1;
+ }
+
+ for (idx = 0; idx < MMC_NUM_GP_PARTITION; idx++) {
+ if (!ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3] &&
+ !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1] &&
+ !ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2])
+ continue;
+ part_size =
+ (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 2]
+ << 16) +
+ (ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3 + 1]
+ << 8) +
+ ext_csd[EXT_CSD_GP_SIZE_MULT + idx * 3];
+ part_size *= (size_t)(hc_erase_grp_sz *
+ hc_wp_grp_sz);
+ mmc_part_add(card, part_size << 19,
+ EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
+ "gp%d", idx, false);
+ }
+ }
card->ext_csd.sec_trim_mult =
ext_csd[EXT_CSD_SEC_TRIM_MULT];
card->ext_csd.sec_erase_mult =
ext_csd[EXT_CSD_TRIM_MULT];
}
- if (card->ext_csd.rev >= 5)
+ if (card->ext_csd.rev >= 5) {
+ /* check whether the eMMC card supports HPI */
+ if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x1) {
+ card->ext_csd.hpi = 1;
+ if (ext_csd[EXT_CSD_HPI_FEATURES] & 0x2)
+ card->ext_csd.hpi_cmd = MMC_STOP_TRANSMISSION;
+ else
+ card->ext_csd.hpi_cmd = MMC_SEND_STATUS;
+ /*
+ * Indicate the maximum timeout to close
+ * a command interrupted by HPI
+ */
+ card->ext_csd.out_of_int_time =
+ ext_csd[EXT_CSD_OUT_OF_INTERRUPT_TIME] * 10;
+ }
+
card->ext_csd.rel_param = ext_csd[EXT_CSD_WR_REL_PARAM];
+ card->ext_csd.rst_n_function = ext_csd[EXT_CSD_RST_N_FUNCTION];
+ }
+ card->ext_csd.raw_erased_mem_count = ext_csd[EXT_CSD_ERASED_MEM_CONT];
if (ext_csd[EXT_CSD_ERASED_MEM_CONT])
card->erased_byte = 0xFF;
else
card->erased_byte = 0x0;
+ /* eMMC v4.5 or later */
+ if (card->ext_csd.rev >= 6) {
+ card->ext_csd.feature_support |= MMC_DISCARD_FEATURE;
+
+ card->ext_csd.generic_cmd6_time = 10 *
+ ext_csd[EXT_CSD_GENERIC_CMD6_TIME];
+ card->ext_csd.power_off_longtime = 10 *
+ ext_csd[EXT_CSD_POWER_OFF_LONG_TIME];
+
+ card->ext_csd.cache_size =
+ ext_csd[EXT_CSD_CACHE_SIZE + 0] << 0 |
+ ext_csd[EXT_CSD_CACHE_SIZE + 1] << 8 |
+ ext_csd[EXT_CSD_CACHE_SIZE + 2] << 16 |
+ ext_csd[EXT_CSD_CACHE_SIZE + 3] << 24;
+ }
+
out:
return err;
}
.groups = mmc_attr_groups,
};
+/*
+ * Select the PowerClass for the current bus width
+ * If power class is defined for 4/8 bit bus in the
+ * extended CSD register, select it by executing the
+ * mmc_switch command.
+ */
+static int mmc_select_powerclass(struct mmc_card *card,
+ unsigned int bus_width, u8 *ext_csd)
+{
+ int err = 0;
+ unsigned int pwrclass_val;
+ unsigned int index = 0;
+ struct mmc_host *host;
+
+ BUG_ON(!card);
+
+ host = card->host;
+ BUG_ON(!host);
+
+ if (ext_csd == NULL)
+ return 0;
+
+ /* Power class selection is supported for versions >= 4.0 */
+ if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
+ return 0;
+
+ /* Power class values are defined only for 4/8 bit bus */
+ if (bus_width == EXT_CSD_BUS_WIDTH_1)
+ return 0;
+
+ switch (1 << host->ios.vdd) {
+ case MMC_VDD_165_195:
+ if (host->ios.clock <= 26000000)
+ index = EXT_CSD_PWR_CL_26_195;
+ else if (host->ios.clock <= 52000000)
+ index = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
+ EXT_CSD_PWR_CL_52_195 :
+ EXT_CSD_PWR_CL_DDR_52_195;
+ else if (host->ios.clock <= 200000000)
+ index = EXT_CSD_PWR_CL_200_195;
+ break;
+ case MMC_VDD_32_33:
+ case MMC_VDD_33_34:
+ case MMC_VDD_34_35:
+ case MMC_VDD_35_36:
+ if (host->ios.clock <= 26000000)
+ index = EXT_CSD_PWR_CL_26_360;
+ else if (host->ios.clock <= 52000000)
+ index = (bus_width <= EXT_CSD_BUS_WIDTH_8) ?
+ EXT_CSD_PWR_CL_52_360 :
+ EXT_CSD_PWR_CL_DDR_52_360;
+ else if (host->ios.clock <= 200000000)
+ index = EXT_CSD_PWR_CL_200_360;
+ break;
+ default:
+ pr_warning("%s: Voltage range not supported "
+ "for power class.\n", mmc_hostname(host));
+ return -EINVAL;
+ }
+
+ pwrclass_val = ext_csd[index];
+
+ if (bus_width & (EXT_CSD_BUS_WIDTH_8 | EXT_CSD_DDR_BUS_WIDTH_8))
+ pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_8BIT_MASK) >>
+ EXT_CSD_PWR_CL_8BIT_SHIFT;
+ else
+ pwrclass_val = (pwrclass_val & EXT_CSD_PWR_CL_4BIT_MASK) >>
+ EXT_CSD_PWR_CL_4BIT_SHIFT;
+
+ /* If the power class is different from the default value */
+ if (pwrclass_val > 0) {
+ err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+ EXT_CSD_POWER_CLASS,
+ pwrclass_val,
+ card->ext_csd.generic_cmd6_time);
+ }
+
+ return err;
+}
+
/*
* Handle the detection and initialisation of a card.
*
BUG_ON(!host);
WARN_ON(!host->claimed);
+ /* Set correct bus mode for MMC before attempting init */
+ if (!mmc_host_is_spi(host))
+ mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
+
/*
* Since we're changing the OCR value, we seem to
* need to tell some cards to go back to the idle
* state. We wait 1ms to give cards time to
* respond.
+ * mmc_go_idle is needed for eMMC that are asleep
*/
mmc_go_idle(host);
*/
if (card->ext_csd.enhanced_area_en) {
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
- EXT_CSD_ERASE_GROUP_DEF, 1, 0);
+ EXT_CSD_ERASE_GROUP_DEF, 1,
+ card->ext_csd.generic_cmd6_time);
if (err && err != -EBADMSG)
goto free_card;
goto free_card;
}
+ /*
+ * If the host supports the power_off_notify capability then
+ * set the notification byte in the ext_csd register of device
+ */
+ if ((host->caps2 & MMC_CAP2_POWEROFF_NOTIFY) &&
+ (card->poweroff_notify_state == MMC_NO_POWER_NOTIFICATION)) {
+ err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+ EXT_CSD_POWER_OFF_NOTIFICATION,
+ EXT_CSD_POWER_ON,
+ card->ext_csd.generic_cmd6_time);
+ if (err && err != -EBADMSG)
+ goto free_card;
+ }
+
+ if (!err)
+ card->poweroff_notify_state = MMC_POWERED_ON;
+
/*
* Activate high speed (if supported)
*/
if ((card->ext_csd.hs_max_dtr != 0) &&
(host->caps & MMC_CAP_MMC_HIGHSPEED)) {
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
- EXT_CSD_HS_TIMING, 1, 0);
+ EXT_CSD_HS_TIMING, 1,
+ card->ext_csd.generic_cmd6_time);
if (err && err != -EBADMSG)
goto free_card;
if (err) {
- printk(KERN_WARNING "%s: switch to highspeed failed\n",
+ pr_warning("%s: switch to highspeed failed\n",
mmc_hostname(card->host));
err = 0;
} else {
}
}
+ /*
+ * Enable HPI feature (if supported)
+ */
+ if (card->ext_csd.hpi) {
+ err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+ EXT_CSD_HPI_MGMT, 1, 0);
+ if (err && err != -EBADMSG)
+ goto free_card;
+ if (err) {
+ pr_warning("%s: Enabling HPI failed\n",
+ mmc_hostname(card->host));
+ err = 0;
+ } else
+ card->ext_csd.hpi_en = 1;
+ }
+
/*
* Compute bus speed.
*/
bus_width = bus_widths[idx];
if (bus_width == MMC_BUS_WIDTH_1)
ddr = 0; /* no DDR for 1-bit width */
+ err = mmc_select_powerclass(card, ext_csd_bits[idx][0],
+ ext_csd);
+ if (err)
+ pr_err("%s: power class selection to "
+ "bus width %d failed\n",
+ mmc_hostname(card->host),
+ 1 << bus_width);
+
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_BUS_WIDTH,
ext_csd_bits[idx][0],
- 0);
+ card->ext_csd.generic_cmd6_time);
if (!err) {
mmc_set_bus_width(card->host, bus_width);
}
if (!err && ddr) {
+ err = mmc_select_powerclass(card, ext_csd_bits[idx][1],
+ ext_csd);
+ if (err)
+ pr_err("%s: power class selection to "
+ "bus width %d ddr %d failed\n",
+ mmc_hostname(card->host),
+ 1 << bus_width, ddr);
+
err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
EXT_CSD_BUS_WIDTH,
ext_csd_bits[idx][1],
- 0);
+ card->ext_csd.generic_cmd6_time);
}
if (err) {
- printk(KERN_WARNING "%s: switch to bus width %d ddr %d "
+ pr_warning("%s: switch to bus width %d ddr %d "
"failed\n", mmc_hostname(card->host),
1 << bus_width, ddr);
goto free_card;
}
}
+ /*
+ * If cache size is higher than 0, this indicates
+ * the existence of cache and it can be turned on.
+ */
+ if ((host->caps2 & MMC_CAP2_CACHE_CTRL) &&
+ card->ext_csd.cache_size > 0) {
+ err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+ EXT_CSD_CACHE_CTRL, 1, 0);
+ if (err && err != -EBADMSG)
+ goto free_card;
+
+ /*
+ * Only if no error, cache is turned on successfully.
+ */
+ card->ext_csd.cache_ctrl = err ? 0 : 1;
+ }
+
if (!oldcard)
host->card = card;
mmc_claim_host(host);
mmc_detach_bus(host);
+ mmc_power_off(host);
mmc_release_host(host);
}
}
*/
static int mmc_suspend(struct mmc_host *host)
{
+ int err = 0;
+
BUG_ON(!host);
BUG_ON(!host->card);
mmc_claim_host(host);
- if (!mmc_host_is_spi(host))
+ if (mmc_card_can_sleep(host))
+ err = mmc_card_sleep(host);
+ else if (!mmc_host_is_spi(host))
mmc_deselect_cards(host);
host->card->state &= ~MMC_STATE_HIGHSPEED;
mmc_release_host(host);
- return 0;
+ return err;
}
/*
BUG_ON(!host);
WARN_ON(!host->claimed);
+ /* Set correct bus mode for MMC before attempting attach */
+ if (!mmc_host_is_spi(host))
+ mmc_set_bus_mode(host, MMC_BUSMODE_OPENDRAIN);
+
err = mmc_send_op_cond(host, 0, &ocr);
if (err)
return err;
* support.
*/
if (ocr & 0x7F) {
- printk(KERN_WARNING "%s: card claims to support voltages "
+ pr_warning("%s: card claims to support voltages "
"below the defined range. These will be ignored.\n",
mmc_hostname(host));
ocr &= ~0x7F;
err:
mmc_detach_bus(host);
- printk(KERN_ERR "%s: error %d whilst initialising MMC card\n",
+ pr_err("%s: error %d whilst initialising MMC card\n",
mmc_hostname(host), err);
return err;
git.openpandora.org / pandora-kernel.git / blobdiff