1 files changed, 188 insertions, 15 deletions

diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index d240427..59b9ba5 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -286,6 +286,27 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
 	}
 	card->ext_csd.raw_card_type = ext_csd[EXT_CSD_CARD_TYPE];
 	switch (ext_csd[EXT_CSD_CARD_TYPE] & EXT_CSD_CARD_TYPE_MASK) {
+	case EXT_CSD_CARD_TYPE_SDR_ALL:
+	case EXT_CSD_CARD_TYPE_SDR_ALL_DDR_1_8V:
+	case EXT_CSD_CARD_TYPE_SDR_ALL_DDR_1_2V:
+	case EXT_CSD_CARD_TYPE_SDR_ALL_DDR_52:
+		card->ext_csd.hs_max_dtr = 200000000;
+		card->ext_csd.card_type = EXT_CSD_CARD_TYPE_SDR_200;
+		break;
+	case EXT_CSD_CARD_TYPE_SDR_1_2V_ALL:
+	case EXT_CSD_CARD_TYPE_SDR_1_2V_DDR_1_8V:
+	case EXT_CSD_CARD_TYPE_SDR_1_2V_DDR_1_2V:
+	case EXT_CSD_CARD_TYPE_SDR_1_2V_DDR_52:
+		card->ext_csd.hs_max_dtr = 200000000;
+		card->ext_csd.card_type = EXT_CSD_CARD_TYPE_SDR_1_2V;
+		break;
+	case EXT_CSD_CARD_TYPE_SDR_1_8V_ALL:
+	case EXT_CSD_CARD_TYPE_SDR_1_8V_DDR_1_8V:
+	case EXT_CSD_CARD_TYPE_SDR_1_8V_DDR_1_2V:
+	case EXT_CSD_CARD_TYPE_SDR_1_8V_DDR_52:
+		card->ext_csd.hs_max_dtr = 200000000;
+		card->ext_csd.card_type = EXT_CSD_CARD_TYPE_SDR_1_8V;
+		break;
 	case EXT_CSD_CARD_TYPE_DDR_52 | EXT_CSD_CARD_TYPE_52 |
 	     EXT_CSD_CARD_TYPE_26:
 		card->ext_csd.hs_max_dtr = 52000000;
@@ -348,7 +369,8 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
 				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);
+					"boot%d", idx, true,
+					MMC_BLK_DATA_AREA_BOOT);
 			}
 		}
 	}
@@ -435,7 +457,8 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
 					hc_wp_grp_sz);
 				mmc_part_add(card, part_size << 19,
 					EXT_CSD_PART_CONFIG_ACC_GP0 + idx,
-					"gp%d", idx, false);
+					"gp%d", idx, false,
+					MMC_BLK_DATA_AREA_GP);
 			}
 		}
 		card->ext_csd.sec_trim_mult =
@@ -446,6 +469,14 @@ static int mmc_read_ext_csd(struct mmc_card *card, u8 *ext_csd)
 			ext_csd[EXT_CSD_SEC_FEATURE_SUPPORT];
 		card->ext_csd.trim_timeout = 300 *
 			ext_csd[EXT_CSD_TRIM_MULT];
+
+		/*
+		 * Note that the call to mmc_part_add above defaults to read
+		 * only. If this default assumption is changed, the call must
+		 * take into account the value of boot_locked below.
+		 */
+		card->ext_csd.boot_ro_lock = ext_csd[EXT_CSD_BOOT_WP];
+		card->ext_csd.boot_ro_lockable = true;
 	}
 
 	if (card->ext_csd.rev >= 5) {
@@ -690,6 +721,79 @@ static int mmc_select_powerclass(struct mmc_card *card,
 }
 
 /*
+ * Selects the desired buswidth and switch to the HS200 mode
+ * if bus width set without error
+ */
+static int mmc_select_hs200(struct mmc_card *card)
+{
+	int idx, err = 0;
+	struct mmc_host *host;
+	static unsigned ext_csd_bits[] = {
+		EXT_CSD_BUS_WIDTH_4,
+		EXT_CSD_BUS_WIDTH_8,
+	};
+	static unsigned bus_widths[] = {
+		MMC_BUS_WIDTH_4,
+		MMC_BUS_WIDTH_8,
+	};
+
+	BUG_ON(!card);
+
+	host = card->host;
+
+	if (card->ext_csd.card_type & EXT_CSD_CARD_TYPE_SDR_1_2V &&
+	    host->caps2 & MMC_CAP2_HS200_1_2V_SDR)
+		if (mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120, 0))
+			err = mmc_set_signal_voltage(host,
+						     MMC_SIGNAL_VOLTAGE_180, 0);
+
+	/* If fails try again during next card power cycle */
+	if (err)
+		goto err;
+
+	idx = (host->caps & MMC_CAP_8_BIT_DATA) ? 1 : 0;
+
+	/*
+	 * Unlike SD, MMC cards dont have a configuration register to notify
+	 * supported bus width. So bus test command should be run to identify
+	 * the supported bus width or compare the ext csd values of current
+	 * bus width and ext csd values of 1 bit mode read earlier.
+	 */
+	for (; idx >= 0; idx--) {
+
+		/*
+		 * Host is capable of 8bit transfer, then switch
+		 * the device to work in 8bit transfer mode. If the
+		 * mmc switch command returns error then switch to
+		 * 4bit transfer mode. On success set the corresponding
+		 * bus width on the host.
+		 */
+		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+				 EXT_CSD_BUS_WIDTH,
+				 ext_csd_bits[idx],
+				 card->ext_csd.generic_cmd6_time);
+		if (err)
+			continue;
+
+		mmc_set_bus_width(card->host, bus_widths[idx]);
+
+		if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
+			err = mmc_compare_ext_csds(card, bus_widths[idx]);
+		else
+			err = mmc_bus_test(card, bus_widths[idx]);
+		if (!err)
+			break;
+	}
+
+	/* switch to HS200 mode if bus width set successfully */
+	if (!err)
+		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+				 EXT_CSD_HS_TIMING, 2, 0);
+err:
+	return err;
+}
+
+/*
  * Handle the detection and initialisation of a card.
  *
  * In the case of a resume, "oldcard" will contain the card
@@ -895,11 +999,15 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 	/*
 	 * 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,
-				 card->ext_csd.generic_cmd6_time);
+	if (card->ext_csd.hs_max_dtr != 0) {
+		err = 0;
+		if (card->ext_csd.hs_max_dtr > 52000000 &&
+		    host->caps2 & MMC_CAP2_HS200)
+			err = mmc_select_hs200(card);
+		else if	(host->caps & MMC_CAP_MMC_HIGHSPEED)
+			err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+					 EXT_CSD_HS_TIMING, 1, 0);
+
 		if (err && err != -EBADMSG)
 			goto free_card;
 
@@ -908,8 +1016,15 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 			       mmc_hostname(card->host));
 			err = 0;
 		} else {
-			mmc_card_set_highspeed(card);
-			mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
+			if (card->ext_csd.hs_max_dtr > 52000000 &&
+			    host->caps2 & MMC_CAP2_HS200) {
+				mmc_card_set_hs200(card);
+				mmc_set_timing(card->host,
+					       MMC_TIMING_MMC_HS200);
+			} else {
+				mmc_card_set_highspeed(card);
+				mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
+			}
 		}
 	}
 
@@ -934,7 +1049,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 	 */
 	max_dtr = (unsigned int)-1;
 
-	if (mmc_card_highspeed(card)) {
+	if (mmc_card_highspeed(card) || mmc_card_hs200(card)) {
 		if (max_dtr > card->ext_csd.hs_max_dtr)
 			max_dtr = card->ext_csd.hs_max_dtr;
 	} else if (max_dtr > card->csd.max_dtr) {
@@ -960,9 +1075,48 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 	}
 
 	/*
+	 * Indicate HS200 SDR mode (if supported).
+	 */
+	if (mmc_card_hs200(card)) {
+		u32 ext_csd_bits;
+		u32 bus_width = card->host->ios.bus_width;
+
+		/*
+		 * For devices supporting HS200 mode, the bus width has
+		 * to be set before executing the tuning function. If
+		 * set before tuning, then device will respond with CRC
+		 * errors for responses on CMD line. So for HS200 the
+		 * sequence will be
+		 * 1. set bus width 4bit / 8 bit (1 bit not supported)
+		 * 2. switch to HS200 mode
+		 * 3. set the clock to > 52Mhz <=200MHz and
+		 * 4. execute tuning for HS200
+		 */
+		if ((host->caps2 & MMC_CAP2_HS200) &&
+		    card->host->ops->execute_tuning)
+			err = card->host->ops->execute_tuning(card->host,
+				MMC_SEND_TUNING_BLOCK_HS200);
+		if (err) {
+			pr_warning("%s: tuning execution failed\n",
+				   mmc_hostname(card->host));
+			goto err;
+		}
+
+		ext_csd_bits = (bus_width == MMC_BUS_WIDTH_8) ?
+				EXT_CSD_BUS_WIDTH_8 : EXT_CSD_BUS_WIDTH_4;
+		err = mmc_select_powerclass(card, ext_csd_bits, ext_csd);
+		if (err) {
+			pr_err("%s: power class selection to bus width %d failed\n",
+				mmc_hostname(card->host), 1 << bus_width);
+			goto err;
+		}
+	}
+
+	/*
 	 * Activate wide bus and DDR (if supported).
 	 */
-	if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) &&
+	if (!mmc_card_hs200(card) &&
+	    (card->csd.mmca_vsn >= CSD_SPEC_VER_3) &&
 	    (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) {
 		static unsigned ext_csd_bits[][2] = {
 			{ EXT_CSD_BUS_WIDTH_8, EXT_CSD_DDR_BUS_WIDTH_8 },
@@ -1048,7 +1202,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 			 *
 			 * WARNING: eMMC rules are NOT the same as SD DDR
 			 */
-			if (ddr == EXT_CSD_CARD_TYPE_DDR_1_2V) {
+			if (ddr == MMC_1_2V_DDR_MODE) {
 				err = mmc_set_signal_voltage(host,
 					MMC_SIGNAL_VOLTAGE_120, 0);
 				if (err)
@@ -1067,14 +1221,23 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
 	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);
+				EXT_CSD_CACHE_CTRL, 1,
+				card->ext_csd.generic_cmd6_time);
 		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 (err) {
+			pr_warning("%s: Cache is supported, "
+					"but failed to turn on (%d)\n",
+					mmc_hostname(card->host), err);
+			card->ext_csd.cache_ctrl = 0;
+			err = 0;
+		} else {
+			card->ext_csd.cache_ctrl = 1;
+		}
 	}
 
 	if (!oldcard)
@@ -1105,6 +1268,14 @@ static void mmc_remove(struct mmc_host *host)
 }
 
 /*
+ * Card detection - card is alive.
+ */
+static int mmc_alive(struct mmc_host *host)
+{
+	return mmc_send_status(host->card, NULL);
+}
+
+/*
  * Card detection callback from host.
  */
 static void mmc_detect(struct mmc_host *host)
@@ -1119,7 +1290,7 @@ static void mmc_detect(struct mmc_host *host)
 	/*
 	 * Just check if our card has been removed.
 	 */
-	err = mmc_send_status(host->card, NULL);
+	err = _mmc_detect_card_removed(host);
 
 	mmc_release_host(host);
 
@@ -1224,6 +1395,7 @@ static const struct mmc_bus_ops mmc_ops = {
 	.suspend = NULL,
 	.resume = NULL,
 	.power_restore = mmc_power_restore,
+	.alive = mmc_alive,
 };
 
 static const struct mmc_bus_ops mmc_ops_unsafe = {
@@ -1234,6 +1406,7 @@ static const struct mmc_bus_ops mmc_ops_unsafe = {
 	.suspend = mmc_suspend,
 	.resume = mmc_resume,
 	.power_restore = mmc_power_restore,
+	.alive = mmc_alive,
 };
 
 static void mmc_attach_bus_ops(struct mmc_host *host)