X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fmmc%2Fmmc.c;h=6f2a282e2b9759c0511cf5501a0bd4e9bd501e3f;hb=refs%2Fheads%2Fvserver;hp=1888060c5e0c415cf5701250f845bf4d27a5e0a4;hpb=76828883507a47dae78837ab5dec5a5b4513c667;p=linux-2.6.git

diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 1888060c5..6f2a282e2 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -4,12 +4,12 @@
  *  Copyright (C) 2003-2004 Russell King, All Rights Reserved.
  *  SD support Copyright (C) 2004 Ian Molton, All Rights Reserved.
  *  SD support Copyright (C) 2005 Pierre Ossman, All Rights Reserved.
+ *  MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
-#include <linux/config.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
@@ -27,12 +27,6 @@
 
 #include "mmc.h"
 
-#ifdef CONFIG_MMC_DEBUG
-#define DBG(x...)	printk(KERN_DEBUG x)
-#else
-#define DBG(x...)	do { } while (0)
-#endif
-
 #define CMD_RETRIES	3
 
 /*
@@ -65,20 +59,23 @@ static const unsigned int tacc_mant[] = {
 
 
 /**
- *	mmc_request_done - finish processing an MMC command
- *	@host: MMC host which completed command
- *	@mrq: MMC request which completed
+ *	mmc_request_done - finish processing an MMC request
+ *	@host: MMC host which completed request
+ *	@mrq: MMC request which request
  *
  *	MMC drivers should call this function when they have completed
- *	their processing of a command.  This should be called before the
- *	data part of the command has completed.
+ *	their processing of a request.
  */
 void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq)
 {
 	struct mmc_command *cmd = mrq->cmd;
-	int err = mrq->cmd->error;
-	DBG("MMC: req done (%02x): %d: %08x %08x %08x %08x\n", cmd->opcode,
-	    err, cmd->resp[0], cmd->resp[1], cmd->resp[2], cmd->resp[3]);
+	int err = cmd->error;
+
+	pr_debug("%s: req done (CMD%u): %d/%d/%d: %08x %08x %08x %08x\n",
+		 mmc_hostname(host), cmd->opcode, err,
+		 mrq->data ? mrq->data->error : 0,
+		 mrq->stop ? mrq->stop->error : 0,
+		 cmd->resp[0], cmd->resp[1], cmd->resp[2], cmd->resp[3]);
 
 	if (err && cmd->retries) {
 		cmd->retries--;
@@ -102,8 +99,9 @@ EXPORT_SYMBOL(mmc_request_done);
 void
 mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
 {
-	DBG("MMC: starting cmd %02x arg %08x flags %08x\n",
-	    mrq->cmd->opcode, mrq->cmd->arg, mrq->cmd->flags);
+	pr_debug("%s: starting CMD%u arg %08x flags %08x\n",
+		 mmc_hostname(host), mrq->cmd->opcode,
+		 mrq->cmd->arg, mrq->cmd->flags);
 
 	WARN_ON(host->card_busy == NULL);
 
@@ -131,7 +129,7 @@ static void mmc_wait_done(struct mmc_request *mrq)
 
 int mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq)
 {
-	DECLARE_COMPLETION(complete);
+	DECLARE_COMPLETION_ONSTACK(complete);
 
 	mrq->done_data = &complete;
 	mrq->done = mmc_wait_done;
@@ -250,6 +248,55 @@ int mmc_wait_for_app_cmd(struct mmc_host *host, unsigned int rca,
 
 EXPORT_SYMBOL(mmc_wait_for_app_cmd);
 
+/**
+ *	mmc_set_data_timeout - set the timeout for a data command
+ *	@data: data phase for command
+ *	@card: the MMC card associated with the data transfer
+ *	@write: flag to differentiate reads from writes
+ */
+void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card,
+			  int write)
+{
+	unsigned int mult;
+
+	/*
+	 * SD cards use a 100 multiplier rather than 10
+	 */
+	mult = mmc_card_sd(card) ? 100 : 10;
+
+	/*
+	 * Scale up the multiplier (and therefore the timeout) by
+	 * the r2w factor for writes.
+	 */
+	if (write)
+		mult <<= card->csd.r2w_factor;
+
+	data->timeout_ns = card->csd.tacc_ns * mult;
+	data->timeout_clks = card->csd.tacc_clks * mult;
+
+	/*
+	 * SD cards also have an upper limit on the timeout.
+	 */
+	if (mmc_card_sd(card)) {
+		unsigned int timeout_us, limit_us;
+
+		timeout_us = data->timeout_ns / 1000;
+		timeout_us += data->timeout_clks * 1000 /
+			(card->host->ios.clock / 1000);
+
+		if (write)
+			limit_us = 250000;
+		else
+			limit_us = 100000;
+
+		if (timeout_us > limit_us) {
+			data->timeout_ns = limit_us * 1000;
+			data->timeout_clks = 0;
+		}
+	}
+}
+EXPORT_SYMBOL(mmc_set_data_timeout);
+
 static int mmc_select_card(struct mmc_host *host, struct mmc_card *card);
 
 /**
@@ -317,6 +364,18 @@ void mmc_release_host(struct mmc_host *host)
 
 EXPORT_SYMBOL(mmc_release_host);
 
+static inline void mmc_set_ios(struct mmc_host *host)
+{
+	struct mmc_ios *ios = &host->ios;
+
+	pr_debug("%s: clock %uHz busmode %u powermode %u cs %u Vdd %u width %u\n",
+		 mmc_hostname(host), ios->clock, ios->bus_mode,
+		 ios->power_mode, ios->chip_select, ios->vdd,
+		 ios->bus_width);
+	
+	host->ops->set_ios(host, ios);
+}
+
 static int mmc_select_card(struct mmc_host *host, struct mmc_card *card)
 {
 	int err;
@@ -338,23 +397,23 @@ static int mmc_select_card(struct mmc_host *host, struct mmc_card *card)
 		return err;
 
 	/*
-	 * Default bus width is 1 bit.
-	 */
-	host->ios.bus_width = MMC_BUS_WIDTH_1;
-
-	/*
-	 * We can only change the bus width of the selected
-	 * card so therefore we have to put the handling
+	 * We can only change the bus width of SD cards when
+	 * they are selected so we have to put the handling
 	 * here.
+	 *
+	 * The card is in 1 bit mode by default so
+	 * we only need to change if it supports the
+	 * wider version.
 	 */
-	if (host->caps & MMC_CAP_4_BIT_DATA) {
+	if (mmc_card_sd(card) &&
+		(card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
+
 		/*
-		 * The card is in 1 bit mode by default so
-		 * we only need to change if it supports the
-		 * wider version.
-		 */
-		if (mmc_card_sd(card) &&
-			(card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
+		* Default bus width is 1 bit.
+		*/
+		host->ios.bus_width = MMC_BUS_WIDTH_1;
+
+		if (host->caps & MMC_CAP_4_BIT_DATA) {
 			struct mmc_command cmd;
 			cmd.opcode = SD_APP_SET_BUS_WIDTH;
 			cmd.arg = SD_BUS_WIDTH_4;
@@ -369,7 +428,7 @@ static int mmc_select_card(struct mmc_host *host, struct mmc_card *card)
 		}
 	}
 
-	host->ops->set_ios(host, &host->ios);
+	mmc_set_ios(host);
 
 	return MMC_ERR_NONE;
 }
@@ -395,11 +454,11 @@ static void mmc_deselect_cards(struct mmc_host *host)
 
 static inline void mmc_delay(unsigned int ms)
 {
-	if (ms < HZ / 1000) {
-		yield();
+	if (ms < 1000 / HZ) {
+		cond_resched();
 		mdelay(ms);
 	} else {
-		msleep_interruptible (ms);
+		msleep(ms);
 	}
 }
 
@@ -417,10 +476,10 @@ static u32 mmc_select_voltage(struct mmc_host *host, u32 ocr)
 	if (bit) {
 		bit -= 1;
 
-		ocr = 3 << bit;
+		ocr &= 3 << bit;
 
 		host->ios.vdd = bit;
-		host->ops->set_ios(host, &host->ios);
+		mmc_set_ios(host);
 	} else {
 		ocr = 0;
 	}
@@ -554,6 +613,7 @@ static void mmc_decode_csd(struct mmc_card *card)
 		csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
 		csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
 		csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
+		csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
 		csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
 		csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
 	} else {
@@ -588,6 +648,7 @@ static void mmc_decode_csd(struct mmc_card *card)
 		csd->read_partial = UNSTUFF_BITS(resp, 79, 1);
 		csd->write_misalign = UNSTUFF_BITS(resp, 78, 1);
 		csd->read_misalign = UNSTUFF_BITS(resp, 77, 1);
+		csd->r2w_factor = UNSTUFF_BITS(resp, 26, 3);
 		csd->write_blkbits = UNSTUFF_BITS(resp, 22, 4);
 		csd->write_partial = UNSTUFF_BITS(resp, 21, 1);
 	}
@@ -671,7 +732,7 @@ static void mmc_idle_cards(struct mmc_host *host)
 	struct mmc_command cmd;
 
 	host->ios.chip_select = MMC_CS_HIGH;
-	host->ops->set_ios(host, &host->ios);
+	mmc_set_ios(host);
 
 	mmc_delay(1);
 
@@ -684,7 +745,7 @@ static void mmc_idle_cards(struct mmc_host *host)
 	mmc_delay(1);
 
 	host->ios.chip_select = MMC_CS_DONTCARE;
-	host->ops->set_ios(host, &host->ios);
+	mmc_set_ios(host);
 
 	mmc_delay(1);
 }
@@ -709,13 +770,13 @@ static void mmc_power_up(struct mmc_host *host)
 	host->ios.chip_select = MMC_CS_DONTCARE;
 	host->ios.power_mode = MMC_POWER_UP;
 	host->ios.bus_width = MMC_BUS_WIDTH_1;
-	host->ops->set_ios(host, &host->ios);
+	mmc_set_ios(host);
 
 	mmc_delay(1);
 
 	host->ios.clock = host->f_min;
 	host->ios.power_mode = MMC_POWER_ON;
-	host->ops->set_ios(host, &host->ios);
+	mmc_set_ios(host);
 
 	mmc_delay(2);
 }
@@ -728,7 +789,7 @@ static void mmc_power_off(struct mmc_host *host)
 	host->ios.chip_select = MMC_CS_DONTCARE;
 	host->ios.power_mode = MMC_POWER_OFF;
 	host->ios.bus_width = MMC_BUS_WIDTH_1;
-	host->ops->set_ios(host, &host->ios);
+	mmc_set_ios(host);
 }
 
 static int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
@@ -893,7 +954,7 @@ static void mmc_read_csds(struct mmc_host *host)
 	}
 }
 
-static void mmc_read_scrs(struct mmc_host *host)
+static void mmc_process_ext_csds(struct mmc_host *host)
 {
 	int err;
 	struct mmc_card *card;
@@ -904,6 +965,135 @@ static void mmc_read_scrs(struct mmc_host *host)
 
 	struct scatterlist sg;
 
+	/*
+	 * As the ext_csd is so large and mostly unused, we don't store the
+	 * raw block in mmc_card.
+	 */
+	u8 *ext_csd;
+	ext_csd = kmalloc(512, GFP_KERNEL);
+	if (!ext_csd) {
+		printk("%s: could not allocate a buffer to receive the ext_csd."
+		       "mmc v4 cards will be treated as v3.\n",
+			mmc_hostname(host));
+		return;
+	}
+
+	list_for_each_entry(card, &host->cards, node) {
+		if (card->state & (MMC_STATE_DEAD|MMC_STATE_PRESENT))
+			continue;
+		if (mmc_card_sd(card))
+			continue;
+		if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
+			continue;
+
+		err = mmc_select_card(host, card);
+		if (err != MMC_ERR_NONE) {
+			mmc_card_set_dead(card);
+			continue;
+		}
+
+		memset(&cmd, 0, sizeof(struct mmc_command));
+
+		cmd.opcode = MMC_SEND_EXT_CSD;
+		cmd.arg = 0;
+		cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
+
+		memset(&data, 0, sizeof(struct mmc_data));
+
+		mmc_set_data_timeout(&data, card, 0);
+
+		data.blksz = 512;
+		data.blocks = 1;
+		data.flags = MMC_DATA_READ;
+		data.sg = &sg;
+		data.sg_len = 1;
+
+		memset(&mrq, 0, sizeof(struct mmc_request));
+
+		mrq.cmd = &cmd;
+		mrq.data = &data;
+
+		sg_init_one(&sg, ext_csd, 512);
+
+		mmc_wait_for_req(host, &mrq);
+
+		if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) {
+			mmc_card_set_dead(card);
+			continue;
+		}
+
+		switch (ext_csd[EXT_CSD_CARD_TYPE]) {
+		case EXT_CSD_CARD_TYPE_52 | EXT_CSD_CARD_TYPE_26:
+			card->ext_csd.hs_max_dtr = 52000000;
+			break;
+		case EXT_CSD_CARD_TYPE_26:
+			card->ext_csd.hs_max_dtr = 26000000;
+			break;
+		default:
+			/* MMC v4 spec says this cannot happen */
+			printk("%s: card is mmc v4 but doesn't support "
+			       "any high-speed modes.\n",
+				mmc_hostname(card->host));
+			mmc_card_set_bad(card);
+			continue;
+		}
+
+		/* Activate highspeed support. */
+		cmd.opcode = MMC_SWITCH;
+		cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
+			  (EXT_CSD_HS_TIMING << 16) |
+			  (1 << 8) |
+			  EXT_CSD_CMD_SET_NORMAL;
+		cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
+
+		err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
+		if (err != MMC_ERR_NONE) {
+			printk("%s: failed to switch card to mmc v4 "
+			       "high-speed mode.\n",
+			       mmc_hostname(card->host));
+			continue;
+		}
+
+		mmc_card_set_highspeed(card);
+
+		/* Check for host support for wide-bus modes. */
+		if (!(host->caps & MMC_CAP_4_BIT_DATA)) {
+			continue;
+		}
+
+		/* Activate 4-bit support. */
+		cmd.opcode = MMC_SWITCH;
+		cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
+			  (EXT_CSD_BUS_WIDTH << 16) |
+			  (EXT_CSD_BUS_WIDTH_4 << 8) |
+			  EXT_CSD_CMD_SET_NORMAL;
+		cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
+
+		err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
+		if (err != MMC_ERR_NONE) {
+			printk("%s: failed to switch card to "
+			       "mmc v4 4-bit bus mode.\n",
+			       mmc_hostname(card->host));
+			continue;
+		}
+
+		host->ios.bus_width = MMC_BUS_WIDTH_4;
+	}
+
+	kfree(ext_csd);
+
+	mmc_deselect_cards(host);
+}
+
+static void mmc_read_scrs(struct mmc_host *host)
+{
+	int err;
+	struct mmc_card *card;
+	struct mmc_request mrq;
+	struct mmc_command cmd;
+	struct mmc_data data;
+	struct scatterlist sg;
+
 	list_for_each_entry(card, &host->cards, node) {
 		if (card->state & (MMC_STATE_DEAD|MMC_STATE_PRESENT))
 			continue;
@@ -936,9 +1126,9 @@ static void mmc_read_scrs(struct mmc_host *host)
 
 		memset(&data, 0, sizeof(struct mmc_data));
 
-		data.timeout_ns = card->csd.tacc_ns * 10;
-		data.timeout_clks = card->csd.tacc_clks * 10;
-		data.blksz_bits = 3;
+		mmc_set_data_timeout(&data, card, 0);
+
+		data.blksz = 1 << 3;
 		data.blocks = 1;
 		data.flags = MMC_DATA_READ;
 		data.sg = &sg;
@@ -967,17 +1157,137 @@ static void mmc_read_scrs(struct mmc_host *host)
 	mmc_deselect_cards(host);
 }
 
+static void mmc_read_switch_caps(struct mmc_host *host)
+{
+	int err;
+	struct mmc_card *card;
+	struct mmc_request mrq;
+	struct mmc_command cmd;
+	struct mmc_data data;
+	unsigned char *status;
+	struct scatterlist sg;
+
+	status = kmalloc(64, GFP_KERNEL);
+	if (!status) {
+		printk(KERN_WARNING "%s: Unable to allocate buffer for "
+			"reading switch capabilities.\n",
+			mmc_hostname(host));
+		return;
+	}
+
+	list_for_each_entry(card, &host->cards, node) {
+		if (card->state & (MMC_STATE_DEAD|MMC_STATE_PRESENT))
+			continue;
+		if (!mmc_card_sd(card))
+			continue;
+		if (card->scr.sda_vsn < SCR_SPEC_VER_1)
+			continue;
+
+		err = mmc_select_card(host, card);
+		if (err != MMC_ERR_NONE) {
+			mmc_card_set_dead(card);
+			continue;
+		}
+
+		memset(&cmd, 0, sizeof(struct mmc_command));
+
+		cmd.opcode = SD_SWITCH;
+		cmd.arg = 0x00FFFFF1;
+		cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
+
+		memset(&data, 0, sizeof(struct mmc_data));
+
+		mmc_set_data_timeout(&data, card, 0);
+
+		data.blksz = 64;
+		data.blocks = 1;
+		data.flags = MMC_DATA_READ;
+		data.sg = &sg;
+		data.sg_len = 1;
+
+		memset(&mrq, 0, sizeof(struct mmc_request));
+
+		mrq.cmd = &cmd;
+		mrq.data = &data;
+
+		sg_init_one(&sg, status, 64);
+
+		mmc_wait_for_req(host, &mrq);
+
+		if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) {
+			mmc_card_set_dead(card);
+			continue;
+		}
+
+		if (status[13] & 0x02)
+			card->sw_caps.hs_max_dtr = 50000000;
+
+		memset(&cmd, 0, sizeof(struct mmc_command));
+
+		cmd.opcode = SD_SWITCH;
+		cmd.arg = 0x80FFFFF1;
+		cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
+
+		memset(&data, 0, sizeof(struct mmc_data));
+
+		mmc_set_data_timeout(&data, card, 0);
+
+		data.blksz = 64;
+		data.blocks = 1;
+		data.flags = MMC_DATA_READ;
+		data.sg = &sg;
+		data.sg_len = 1;
+
+		memset(&mrq, 0, sizeof(struct mmc_request));
+
+		mrq.cmd = &cmd;
+		mrq.data = &data;
+
+		sg_init_one(&sg, status, 64);
+
+		mmc_wait_for_req(host, &mrq);
+
+		if (cmd.error != MMC_ERR_NONE || data.error != MMC_ERR_NONE) {
+			mmc_card_set_dead(card);
+			continue;
+		}
+
+		if ((status[16] & 0xF) != 1) {
+			printk(KERN_WARNING "%s: Problem switching card "
+				"into high-speed mode!\n",
+				mmc_hostname(host));
+			continue;
+		}
+
+		mmc_card_set_highspeed(card);
+	}
+
+	kfree(status);
+
+	mmc_deselect_cards(host);
+}
+
 static unsigned int mmc_calculate_clock(struct mmc_host *host)
 {
 	struct mmc_card *card;
 	unsigned int max_dtr = host->f_max;
 
 	list_for_each_entry(card, &host->cards, node)
-		if (!mmc_card_dead(card) && max_dtr > card->csd.max_dtr)
-			max_dtr = card->csd.max_dtr;
+		if (!mmc_card_dead(card)) {
+			if (mmc_card_highspeed(card) && mmc_card_sd(card)) {
+				if (max_dtr > card->sw_caps.hs_max_dtr)
+					max_dtr = card->sw_caps.hs_max_dtr;
+			} else if (mmc_card_highspeed(card) && !mmc_card_sd(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) {
+				max_dtr = card->csd.max_dtr;
+			}
+		}
 
-	DBG("MMC: selected %d.%03dMHz transfer rate\n",
-	    max_dtr / 1000000, (max_dtr / 1000) % 1000);
+	pr_debug("%s: selected %d.%03dMHz transfer rate\n",
+		 mmc_hostname(host),
+		 max_dtr / 1000000, (max_dtr / 1000) % 1000);
 
 	return max_dtr;
 }
@@ -1051,7 +1361,7 @@ static void mmc_setup(struct mmc_host *host)
 	} else {
 		host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
 		host->ios.clock = host->f_min;
-		host->ops->set_ios(host, &host->ios);
+		mmc_set_ios(host);
 
 		/*
 		 * We should remember the OCR mask from the existing
@@ -1087,12 +1397,15 @@ static void mmc_setup(struct mmc_host *host)
 	 * Ok, now switch to push-pull mode.
 	 */
 	host->ios.bus_mode = MMC_BUSMODE_PUSHPULL;
-	host->ops->set_ios(host, &host->ios);
+	mmc_set_ios(host);
 
 	mmc_read_csds(host);
 
-	if (host->mode == MMC_MODE_SD)
+	if (host->mode == MMC_MODE_SD) {
 		mmc_read_scrs(host);
+		mmc_read_switch_caps(host);
+	} else
+		mmc_process_ext_csds(host);
 }
 
 
@@ -1106,34 +1419,47 @@ static void mmc_setup(struct mmc_host *host)
  */
 void mmc_detect_change(struct mmc_host *host, unsigned long delay)
 {
-	if (delay)
-		schedule_delayed_work(&host->detect, delay);
-	else
-		schedule_work(&host->detect);
+	mmc_schedule_delayed_work(&host->detect, delay);
 }
 
 EXPORT_SYMBOL(mmc_detect_change);
 
 
-static void mmc_rescan(void *data)
+static void mmc_rescan(struct work_struct *work)
 {
-	struct mmc_host *host = data;
+	struct mmc_host *host =
+		container_of(work, struct mmc_host, detect.work);
 	struct list_head *l, *n;
+	unsigned char power_mode;
 
 	mmc_claim_host(host);
 
-	if (host->ios.power_mode == MMC_POWER_ON)
+	/*
+	 * Check for removed cards and newly inserted ones. We check for
+	 * removed cards first so we can intelligently re-select the VDD.
+	 */
+	power_mode = host->ios.power_mode;
+	if (power_mode == MMC_POWER_ON)
 		mmc_check_cards(host);
 
 	mmc_setup(host);
 
+	/*
+	 * Some broken cards process CMD1 even in stand-by state. There is
+	 * no reply, but an ILLEGAL_COMMAND error is cached and returned
+	 * after next command. We poll for card status here to clear any
+	 * possibly pending error.
+	 */
+	if (power_mode == MMC_POWER_ON)
+		mmc_check_cards(host);
+
 	if (!list_empty(&host->cards)) {
 		/*
 		 * (Re-)calculate the fastest clock rate which the
 		 * attached cards and the host support.
 		 */
 		host->ios.clock = mmc_calculate_clock(host);
-		host->ops->set_ios(host, &host->ios);
+		mmc_set_ios(host);
 	}
 
 	mmc_release_host(host);
@@ -1185,7 +1511,7 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *dev)
 		spin_lock_init(&host->lock);
 		init_waitqueue_head(&host->wq);
 		INIT_LIST_HEAD(&host->cards);
-		INIT_WORK(&host->detect, mmc_rescan, host);
+		INIT_DELAYED_WORK(&host->detect, mmc_rescan);
 
 		/*
 		 * By default, hosts do not support SGIO or large requests.
@@ -1252,7 +1578,7 @@ EXPORT_SYMBOL(mmc_remove_host);
  */
 void mmc_free_host(struct mmc_host *host)
 {
-	flush_scheduled_work();
+	mmc_flush_scheduled_work();
 	mmc_free_host_sysfs(host);
 }
 
@@ -1283,7 +1609,7 @@ EXPORT_SYMBOL(mmc_suspend_host);
  */
 int mmc_resume_host(struct mmc_host *host)
 {
-	mmc_rescan(host);
+	mmc_rescan(&host->detect.work);
 
 	return 0;
 }