Commit cdb54fac authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/drzeus/mmc 

* 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/drzeus/mmc:
  mmc: correct request error handling
  mmc: Flush block queue when removing card
  mmc: sdhci high speed support
  mmc: Support for high speed SD cards
  mmc: Fix mmc_delay() function
  mmc: Add support for mmc v4 wide-bus modes
  [PATCH] mmc: Add support for mmc v4 high speed mode
  trivial change for mmc/Kconfig: MMC_PXA does not mean only PXA255
  Make general code cleanups
  Add MMC_CAP_{MULTIWRITE,BYTEBLOCK} flags
  Platform device error handling cleanup
  Move register definitions away from the header file
  Change OMAP_MMC_{READ,WRITE} macros to use the host pointer
  Replace base with virt_base and phys_base
  mmc: constify mmc_host_ops vectors
  mmc: remove kernel_thread()
parents 37043318 8b7feff8

drivers/mmc/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -40,7 +40,7 @@ config MMC_ARMMMCI 
	  If unsure, say N.



config MMC_PXA

	tristate "Intel PXA255 Multimedia Card Interface support"

	tristate "Intel PXA25x/26x/27x Multimedia Card Interface support"

	depends on ARCH_PXA && MMC

	help

	  This selects the Intel(R) PXA(R) Multimedia card Interface.

drivers/mmc/at91_mci.c

+1 −1
Original line number Diff line number Diff line
@@ -793,7 +793,7 @@ int at91_mci_get_ro(struct mmc_host *mmc) 
	return read_only;

}



static struct mmc_host_ops at91_mci_ops = {

static const struct mmc_host_ops at91_mci_ops = {

	.request	= at91_mci_request,

	.set_ios	= at91_mci_set_ios,

	.get_ro		= at91_mci_get_ro,

drivers/mmc/au1xmmc.c

+1 −1
Original line number Diff line number Diff line
@@ -875,7 +875,7 @@ static void au1xmmc_init_dma(struct au1xmmc_host *host) 
	host->rx_chan = rxchan;

}



struct mmc_host_ops au1xmmc_ops = {

struct const mmc_host_ops au1xmmc_ops = {

	.request	= au1xmmc_request,

	.set_ios	= au1xmmc_set_ios,

};

drivers/mmc/imxmmc.c

+1 −1
Original line number Diff line number Diff line
@@ -877,7 +877,7 @@ static void imxmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 
	}

}



static struct mmc_host_ops imxmci_ops = {

static const struct mmc_host_ops imxmci_ops = {

	.request	= imxmci_request,

	.set_ios	= imxmci_set_ios,

};

drivers/mmc/mmc.c

+274 −20
Original line number Diff line number Diff line
@@ -4,6 +4,7 @@ 
 *  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
@@ -396,23 +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.

	 */

	if (host->caps & MMC_CAP_4_BIT_DATA) {

		/*

	 *

	 * 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;
@@ -453,11 +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);

	}

}
@@ -953,6 +954,137 @@ static void mmc_read_csds(struct mmc_host *host) 
	}

}



static void mmc_process_ext_csds(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;



	/*

	 * 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;
@@ -1025,14 +1157,133 @@ 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)

		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;

			}

		}



	pr_debug("%s: selected %d.%03dMHz transfer rate\n",

		 mmc_hostname(host),
@@ -1150,8 +1401,11 @@ static void mmc_setup(struct mmc_host *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);

}

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