Merge master.kernel.org:/home/rmk/linux-2.6-mmc

* master.kernel.org:/home/rmk/linux-2.6-mmc:
  [MMC] Move set_ios debugging into mmc.c
  [MMC] Correct mmc_request_done comments
  [MMC] PXA: reduce the number of lines PXAMCI debug uses
  [MMC] PXA and i.MX: don't avoid sending stop command on error
  [MMC] extend data timeout for writes
  [ARM] 3485/1: i.MX: MX1 SD/MMC fix of unintentional double start possibility

drivers/mmc/at91_mci.c

@@ -621,9 +621,6 @@ static void at91_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 	struct at91mci_host *host = mmc_priv(mmc);
 	unsigned long at91_master_clock = clk_get_rate(mci_clk);
 
-	DBG("Clock %uHz, busmode %u, powermode %u, Vdd %u\n",
-		ios->clock, ios->bus_mode, ios->power_mode, ios->vdd);
-
 	if (host)
 		host->bus_mode = ios->bus_mode;
 	else

drivers/mmc/au1xmmc.c

@@ -720,10 +720,6 @@ static void au1xmmc_set_ios(struct mmc_host* mmc, struct mmc_ios* ios)
 {
 	struct au1xmmc_host *host = mmc_priv(mmc);
 
-	DBG("set_ios (power=%u, clock=%uHz, vdd=%u, mode=%u)\n",
-	      host->id, ios->power_mode, ios->clock, ios->vdd,
-	      ios->bus_mode);
-
 	if (ios->power_mode == MMC_POWER_OFF)
 		au1xmmc_set_power(host, 0);
 	else if (ios->power_mode == MMC_POWER_ON) {

drivers/mmc/imxmmc.c

@@ -102,6 +102,7 @@ struct imxmci_host {
 #define IMXMCI_PEND_CPU_DATA_b	5
 #define IMXMCI_PEND_CARD_XCHG_b	6
 #define IMXMCI_PEND_SET_INIT_b	7
+#define IMXMCI_PEND_STARTED_b	8
 
 #define IMXMCI_PEND_IRQ_m	(1 << IMXMCI_PEND_IRQ_b)
 #define IMXMCI_PEND_DMA_END_m	(1 << IMXMCI_PEND_DMA_END_b)
@@ -111,6 +112,7 @@ struct imxmci_host {
 #define IMXMCI_PEND_CPU_DATA_m	(1 << IMXMCI_PEND_CPU_DATA_b)
 #define IMXMCI_PEND_CARD_XCHG_m	(1 << IMXMCI_PEND_CARD_XCHG_b)
 #define IMXMCI_PEND_SET_INIT_m	(1 << IMXMCI_PEND_SET_INIT_b)
+#define IMXMCI_PEND_STARTED_m	(1 << IMXMCI_PEND_STARTED_b)
 
 static void imxmci_stop_clock(struct imxmci_host *host)
 {
@@ -131,23 +133,52 @@ static void imxmci_stop_clock(struct imxmci_host *host)
 	dev_dbg(mmc_dev(host->mmc), "imxmci_stop_clock blocked, no luck\n");
 }
 
-static void imxmci_start_clock(struct imxmci_host *host)
+static int imxmci_start_clock(struct imxmci_host *host)
 {
-	int i = 0;
+	unsigned int trials = 0;
+	unsigned int delay_limit = 128;
+	unsigned long flags;
+
 	MMC_STR_STP_CLK &= ~STR_STP_CLK_STOP_CLK;
-	while(i < 0x1000) {
-	        if(!(i & 0x7f))
+
+	clear_bit(IMXMCI_PEND_STARTED_b, &host->pending_events);
+
+	/*
+	 * Command start of the clock, this usually succeeds in less
+	 * then 6 delay loops, but during card detection (low clockrate)
+	 * it takes up to 5000 delay loops and sometimes fails for the first time
+	 */
 	MMC_STR_STP_CLK |= STR_STP_CLK_START_CLK;
 
-		if(MMC_STATUS & STATUS_CARD_BUS_CLK_RUN) {
+	do {
+		unsigned int delay = delay_limit;
+
+		while(delay--){
+			if(MMC_STATUS & STATUS_CARD_BUS_CLK_RUN)
 				/* Check twice before cut */
 				if(MMC_STATUS & STATUS_CARD_BUS_CLK_RUN)
-				return;
-		}
+					return 0;
 
-		i++;
+			if(test_bit(IMXMCI_PEND_STARTED_b, &host->pending_events))
+				return 0;
 		}
-	dev_dbg(mmc_dev(host->mmc), "imxmci_start_clock blocked, no luck\n");
+
+		local_irq_save(flags);
+		/*
+		 * Ensure, that request is not doubled under all possible circumstances.
+		 * It is possible, that cock running state is missed, because some other
+		 * IRQ or schedule delays this function execution and the clocks has
+		 * been already stopped by other means (response processing, SDHC HW)
+		 */
+		if(!test_bit(IMXMCI_PEND_STARTED_b, &host->pending_events))
+			MMC_STR_STP_CLK |= STR_STP_CLK_START_CLK;
+		local_irq_restore(flags);
+
+	} while(++trials<256);
+
+	dev_err(mmc_dev(host->mmc), "imxmci_start_clock blocked, no luck\n");
+
+	return -1;
 }
 
 static void imxmci_softreset(void)
@@ -498,7 +529,7 @@ static int imxmci_data_done(struct imxmci_host *host, unsigned int stat)
 
 	data_error = imxmci_finish_data(host, stat);
 
-	if (host->req->stop && (data_error == MMC_ERR_NONE)) {
+	if (host->req->stop) {
 		imxmci_stop_clock(host);
 		imxmci_start_cmd(host, host->req->stop, 0);
 	} else {
@@ -622,6 +653,7 @@ static irqreturn_t imxmci_irq(int irq, void *devid, struct pt_regs *regs)
 	atomic_set(&host->stuck_timeout, 0);
 	host->status_reg = stat;
 	set_bit(IMXMCI_PEND_IRQ_b, &host->pending_events);
+	set_bit(IMXMCI_PEND_STARTED_b, &host->pending_events);
 	tasklet_schedule(&host->tasklet);
 
 	return IRQ_RETVAL(handled);;
@@ -775,10 +807,6 @@ static void imxmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 	struct imxmci_host *host = mmc_priv(mmc);
 	int prescaler;
 
-	dev_dbg(mmc_dev(host->mmc), "clock %u power %u vdd %u width %u\n",
-		ios->clock, ios->power_mode, ios->vdd,
-		(ios->bus_width==MMC_BUS_WIDTH_4)?4:1);
-
 	if( ios->bus_width==MMC_BUS_WIDTH_4 ) {
 		host->actual_bus_width = MMC_BUS_WIDTH_4;
 		imx_gpio_mode(PB11_PF_SD_DAT3);

drivers/mmc/mmc.c

@@ -59,21 +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;
-	pr_debug("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--;
@@ -97,8 +99,9 @@ EXPORT_SYMBOL(mmc_request_done);
 void
 mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
 {
-	pr_debug("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);
 
@@ -312,6 +315,18 @@ 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;
@@ -364,7 +379,7 @@ 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;
 }
@@ -415,7 +430,7 @@ static u32 mmc_select_voltage(struct mmc_host *host, u32 ocr)
 		ocr = 3 << bit;
 
 		host->ios.vdd = bit;
-		host->ops->set_ios(host, &host->ios);
+		mmc_set_ios(host);
 	} else {
 		ocr = 0;
 	}
@@ -549,6 +564,7 @@ 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 {
@@ -583,6 +599,7 @@ 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);
 	}
@@ -666,7 +683,7 @@ 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);
 
@@ -679,7 +696,7 @@ 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);
 }
@@ -704,13 +721,13 @@ 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);
 }
@@ -723,7 +740,7 @@ 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)
@@ -971,7 +988,8 @@ static unsigned int mmc_calculate_clock(struct mmc_host *host)
 		if (!mmc_card_dead(card) && max_dtr > card->csd.max_dtr)
 			max_dtr = card->csd.max_dtr;
 
-	pr_debug("MMC: selected %d.%03dMHz transfer rate\n",
+	pr_debug("%s: selected %d.%03dMHz transfer rate\n",
+		 mmc_hostname(host),
 		 max_dtr / 1000000, (max_dtr / 1000) % 1000);
 
 	return max_dtr;
@@ -1046,7 +1064,7 @@ 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
@@ -1082,7 +1100,7 @@ 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);
 
@@ -1128,7 +1146,7 @@ static void mmc_rescan(void *data)
 		 * 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);

drivers/mmc/mmc_block.c

@@ -187,6 +187,12 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
 			brq.cmd.opcode = MMC_WRITE_BLOCK;
 			brq.data.flags |= MMC_DATA_WRITE;
 			brq.data.blocks = 1;
+
+			/*
+			 * Scale up the timeout by the r2w factor
+			 */
+			brq.data.timeout_ns <<= card->csd.r2w_factor;
+			brq.data.timeout_clks <<= card->csd.r2w_factor;
 		}
 
 		if (brq.data.blocks > 1) {

drivers/mmc/mmci.c

@@ -402,9 +402,6 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 	struct mmci_host *host = mmc_priv(mmc);
 	u32 clk = 0, pwr = 0;
 
-	DBG(host, "clock %uHz busmode %u powermode %u Vdd %u\n",
-	    ios->clock, ios->bus_mode, ios->power_mode, ios->vdd);
-
 	if (ios->clock) {
 		if (ios->clock >= host->mclk) {
 			clk = MCI_CLK_BYPASS;

drivers/mmc/pxamci.c

@@ -198,7 +198,6 @@ static void pxamci_start_cmd(struct pxamci_host *host, struct mmc_command *cmd,
 
 static void pxamci_finish_request(struct pxamci_host *host, struct mmc_request *mrq)
 {
-	pr_debug("PXAMCI: request done\n");
 	host->mrq = NULL;
 	host->cmd = NULL;
 	host->data = NULL;
@@ -291,7 +290,7 @@ static int pxamci_data_done(struct pxamci_host *host, unsigned int stat)
 	pxamci_disable_irq(host, DATA_TRAN_DONE);
 
 	host->data = NULL;
-	if (host->mrq->stop && data->error == MMC_ERR_NONE) {
+	if (host->mrq->stop) {
 		pxamci_stop_clock(host);
 		pxamci_start_cmd(host, host->mrq->stop, 0);
 	} else {
@@ -309,12 +308,10 @@ static irqreturn_t pxamci_irq(int irq, void *devid, struct pt_regs *regs)
 
 	ireg = readl(host->base + MMC_I_REG);
 
-	pr_debug("PXAMCI: irq %08x\n", ireg);
-
 	if (ireg) {
 		unsigned stat = readl(host->base + MMC_STAT);
 
-		pr_debug("PXAMCI: stat %08x\n", stat);
+		pr_debug("PXAMCI: irq %08x stat %08x\n", ireg, stat);
 
 		if (ireg & END_CMD_RES)
 			handled |= pxamci_cmd_done(host, stat);
@@ -368,10 +365,6 @@ static void pxamci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 {
 	struct pxamci_host *host = mmc_priv(mmc);
 
-	pr_debug("pxamci_set_ios: clock %u power %u vdd %u.%02u\n",
-		 ios->clock, ios->power_mode, ios->vdd / 100,
-		 ios->vdd % 100);
-
 	if (ios->clock) {
 		unsigned int clk = CLOCKRATE / ios->clock;
 		if (CLOCKRATE / clk > ios->clock)
@@ -397,7 +390,7 @@ static void pxamci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 			host->cmdat |= CMDAT_INIT;
 	}
 
-	pr_debug("pxamci_set_ios: clkrt = %x cmdat = %x\n",
+	pr_debug("PXAMCI: clkrt = %x cmdat = %x\n",
 		 host->clkrt, host->cmdat);
 }
 

drivers/mmc/sdhci.c

@@ -570,10 +570,6 @@ static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 
 	spin_lock_irqsave(&host->lock, flags);
 
-	DBG("clock %uHz busmode %u powermode %u cs %u Vdd %u width %u\n",
-	     ios->clock, ios->bus_mode, ios->power_mode, ios->chip_select,
-	     ios->vdd, ios->bus_width);
-
 	/*
 	 * Reset the chip on each power off.
 	 * Should clear out any weird states.

drivers/mmc/wbsd.c

@@ -931,10 +931,6 @@ static void wbsd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 	struct wbsd_host *host = mmc_priv(mmc);
 	u8 clk, setup, pwr;
 
-	DBGF("clock %uHz busmode %u powermode %u cs %u Vdd %u width %u\n",
-		ios->clock, ios->bus_mode, ios->power_mode, ios->chip_select,
-		ios->vdd, ios->bus_width);
-
 	spin_lock_bh(&host->lock);
 
 	/*

include/linux/mmc/card.h

@@ -28,6 +28,7 @@ struct mmc_csd {
 	unsigned short		cmdclass;
 	unsigned short		tacc_clks;
 	unsigned int		tacc_ns;
+	unsigned int		r2w_factor;
 	unsigned int		max_dtr;
 	unsigned int		read_blkbits;
 	unsigned int		write_blkbits;