/*
 * Given a 128-bit response, decode to our card CSD structure.
 */
static int mmc_decode_csd(struct mmc_card *card)
{
	struct mmc_csd *csd = &card->csd;
	unsigned int e, m, csd_struct;
	u32 *resp = card->raw_csd;

	/*
	 * We only understand CSD structure v1.1 and v1.2.
	 * v1.2 has extra information in bits 15, 11 and 10.
	 */
	csd_struct = UNSTUFF_BITS(resp, 126, 2);
#if defined(CONFIG_INAND_VERSION_PATCH)
	if (csd_struct != 1 && csd_struct != 2 && csd_struct != 3) {
#else
	if (csd_struct != 1 && csd_struct != 2) {
#endif	
		printk(KERN_ERR "%s: unrecognised CSD structure version %d\n",
			mmc_hostname(card->host), csd_struct);
		return -EINVAL;
	}

	csd->mmca_vsn	 = UNSTUFF_BITS(resp, 122, 4);
	m = UNSTUFF_BITS(resp, 115, 4);
	e = UNSTUFF_BITS(resp, 112, 3);
	csd->tacc_ns	 = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
	csd->tacc_clks	 = UNSTUFF_BITS(resp, 104, 8) * 100;

	m = UNSTUFF_BITS(resp, 99, 4);
	e = UNSTUFF_BITS(resp, 96, 3);
	csd->max_dtr	  = tran_exp[e] * tran_mant[m];
	csd->cmdclass	  = UNSTUFF_BITS(resp, 84, 12);

	e = UNSTUFF_BITS(resp, 47, 3);
	m = UNSTUFF_BITS(resp, 62, 12);
	csd->capacity	  = (1 + m) << (e + 2);

	csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
	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);

	return 0;
}

/*
 * Read and decode extended CSD.
 */
static int mmc_read_ext_csd(struct mmc_card *card)
{
	int err;
	u8 *ext_csd;
	unsigned int ext_csd_struct;

	BUG_ON(!card);

	if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
		return 0;

	/*
	 * As the ext_csd is so large and mostly unused, we don't store the
	 * raw block in mmc_card.
	 */
	ext_csd = kmalloc(512, GFP_KERNEL);
	if (!ext_csd) {
		printk(KERN_ERR "%s: could not allocate a buffer to "
			"receive the ext_csd.\n", mmc_hostname(card->host));
		return -ENOMEM;
	}

	err = mmc_send_ext_csd(card, ext_csd);
	if (err) {
		/*
		 * We all hosts that cannot perform the command
		 * to fail more gracefully
		 */
		if (err != -EINVAL)
			goto out;

		/*
		 * High capacity cards should have this "magic" size
		 * stored in their CSD.
		 */
		if (card->csd.capacity == (4096 * 512)) {
			printk(KERN_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 "
				"EXT_CSD, performance might "
				"suffer.\n",
				mmc_hostname(card->host));
			err = 0;
		}

		goto out;
	}

	ext_csd_struct = ext_csd[EXT_CSD_REV];
#if defined(CONFIG_INAND_VERSION_PATCH)
	if (ext_csd_struct > 5) {
#else
	if (ext_csd_struct > 3) {
#endif
		printk(KERN_ERR "%s: unrecognised EXT_CSD structure "
			"version %d\n", mmc_hostname(card->host),
			ext_csd_struct);
		err = -EINVAL;
		goto out;
	}

	if (ext_csd_struct >= 2) {
		card->ext_csd.sectors =
			ext_csd[EXT_CSD_SEC_CNT + 0] << 0 |
			ext_csd[EXT_CSD_SEC_CNT + 1] << 8 |
			ext_csd[EXT_CSD_SEC_CNT + 2] << 16 |
			ext_csd[EXT_CSD_SEC_CNT + 3] << 24;
#if !defined(CONFIG_INAND_VERSION_PATCH)
		if (card->ext_csd.sectors)
			mmc_card_set_blockaddr(card);
#endif
	}

	switch (ext_csd[EXT_CSD_CARD_TYPE] & EXT_CSD_CARD_TYPE_MASK) {
	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(KERN_WARNING "%s: card is mmc v4 but doesn't "
			"support any high-speed modes.\n",
			mmc_hostname(card->host));
		goto out;
	}

out:
	kfree(ext_csd);

	return err;
}

MMC_DEV_ATTR(cid, "%08x%08x%08x%08x\n", card->raw_cid[0], card->raw_cid[1],
	card->raw_cid[2], card->raw_cid[3]);
MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1],
	card->raw_csd[2], card->raw_csd[3]);
MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year);
MMC_DEV_ATTR(fwrev, "0x%x\n", card->cid.fwrev);
MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev);
MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid);
MMC_DEV_ATTR(name, "%s\n", card->cid.prod_name);
MMC_DEV_ATTR(oemid, "0x%04x\n", card->cid.oemid);
MMC_DEV_ATTR(serial, "0x%08x\n", card->cid.serial);

static struct attribute *mmc_std_attrs[] = {
	&dev_attr_cid.attr,
	&dev_attr_csd.attr,
	&dev_attr_date.attr,
	&dev_attr_fwrev.attr,
	&dev_attr_hwrev.attr,
	&dev_attr_manfid.attr,
	&dev_attr_name.attr,
	&dev_attr_oemid.attr,
	&dev_attr_serial.attr,
	NULL,
};

static struct attribute_group mmc_std_attr_group = {
	.attrs = mmc_std_attrs,
};

static struct attribute_group *mmc_attr_groups[] = {
	&mmc_std_attr_group,
	NULL,
};

static struct device_type mmc_type = {
	.groups = mmc_attr_groups,
};

/*
 * Handle the detection and initialisation of a card.
 *
 * In the case of a resume, "oldcard" will contain the card
 * we're trying to reinitialise.
 */
static int mmc_init_card(struct mmc_host *host, u32 ocr,
	struct mmc_card *oldcard)
{
	struct mmc_card *card;
	int err;
	u32 cid[4];
#if defined(CONFIG_INAND_VERSION_PATCH)		
	u32 rocr[1];
#endif
	unsigned int max_dtr;

	BUG_ON(!host);
	WARN_ON(!host->claimed);

	/*
	 * 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(host);

	/* The extra bit indicates that we support high capacity */
#if defined(CONFIG_INAND_VERSION_PATCH)		
	err = mmc_send_op_cond(host, ocr | (1 << 30), rocr);
#else
	err = mmc_send_op_cond(host, ocr | (1 << 30), NULL);
#endif
	if (err)
		goto err;

	/*
	 * For SPI, enable CRC as appropriate.
	 */
	if (mmc_host_is_spi(host)) {
		err = mmc_spi_set_crc(host, use_spi_crc);
		if (err)
			goto err;
	}

	/*
	 * Fetch CID from card.
	 */
	if (mmc_host_is_spi(host))
		err = mmc_send_cid(host, cid);
	else
		err = mmc_all_send_cid(host, cid);
	if (err)
		goto err;

	if (oldcard) {
		if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
			err = -ENOENT;
			goto err;
		}

		card = oldcard;
	} else {
		/*
		 * Allocate card structure.
		 */
		card = mmc_alloc_card(host, &mmc_type);
		if (IS_ERR(card)) {
			err = PTR_ERR(card);
			goto err;
		}

		card->type = MMC_TYPE_MMC;
		card->rca = 1;
		memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
		host->card = card;
	}

	/*
	 * For native busses:  set card RCA and quit open drain mode.
	 */
	if (!mmc_host_is_spi(host)) {
		err = mmc_set_relative_addr(card);
		if (err)
			goto free_card;

		mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
	}

	if (!oldcard) {
		/*
		 * Fetch CSD from card.
		 */
		err = mmc_send_csd(card, card->raw_csd);
		if (err)
			goto free_card;

		err = mmc_decode_csd(card);
		if (err)
			goto free_card;
		err = mmc_decode_cid(card);
		if (err)
			goto free_card;
	}

	/*
	 * Select card, as all following commands rely on that.
	 */
	if (!mmc_host_is_spi(host)) {
		err = mmc_select_card(card);
		if (err)
			goto free_card;
	}

	if (!oldcard) {
		/*
		 * Fetch and process extended CSD.
		 */
		err = mmc_read_ext_csd(card);
		if (err)
			goto free_card;
#if defined(CONFIG_INAND_VERSION_PATCH)		
		if (rocr[0] & 0x40000000)
			mmc_card_set_blockaddr(card);
#endif	
	}

	/*
	 * 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);
		if (err)
			goto free_card;

		mmc_card_set_highspeed(card);

		mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
	}

	/*
	 * Compute bus speed.
	 */
	max_dtr = (unsigned int)-1;

	if (mmc_card_highspeed(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;
	}

	mmc_set_clock(host, max_dtr);

	/*
	 * Activate wide bus (if supported).
	 */
	if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) &&
	    (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) {
		unsigned ext_csd_bit, bus_width;

		if (host->caps & MMC_CAP_8_BIT_DATA) {
			ext_csd_bit = EXT_CSD_BUS_WIDTH_8;
			bus_width = MMC_BUS_WIDTH_8;
		} else {
			ext_csd_bit = EXT_CSD_BUS_WIDTH_4;
			bus_width = MMC_BUS_WIDTH_4;
		}

		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
				 EXT_CSD_BUS_WIDTH, ext_csd_bit);

		if (err)
			goto free_card;

		mmc_set_bus_width(card->host, bus_width);
	}

	if (!oldcard)
		host->card = card;

	return 0;

free_card:
	if (!oldcard) {
		mmc_remove_card(card);
		host->card = NULL;
	}
err:

	return err;
}

/*
 * Host is being removed. Free up the current card.
 */
static void mmc_remove(struct mmc_host *host)
{
	BUG_ON(!host);
	BUG_ON(!host->card);

	mmc_remove_card(host->card);
	host->card = NULL;
}
Exemplo n.º 2
0
/*
 * Handle the detection and initialisation of a card.
 *
 * In the case of a resume, "oldcard" will contain the card
 * we're trying to reinitialise.
 */
static int mmc_init_card(struct mmc_host *host, u32 ocr,
	struct mmc_card *oldcard)
{
	struct mmc_card *card;
	int err;
	u32 cid[4];
	unsigned int max_dtr;

	BUG_ON(!host);
	WARN_ON(!host->claimed);

	/*
	 * 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(host);

	/* The extra bit indicates that we support high capacity */
	err = mmc_send_op_cond(host, ocr | (1 << 30), NULL);
	if (err)
		goto err;

	/*
	 * For SPI, enable CRC as appropriate.
	 */
	if (mmc_host_is_spi(host)) {
		err = mmc_spi_set_crc(host, use_spi_crc);
		if (err)
			goto err;
	}

	/*
	 * Fetch CID from card.
	 */
	if (mmc_host_is_spi(host))
		err = mmc_send_cid(host, cid);
	else
		err = mmc_all_send_cid(host, cid);
	if (err)
		goto err;

	if (oldcard) {
		if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
			err = -ENOENT;
			goto err;
		}

		card = oldcard;
	} else {
		/*
		 * Allocate card structure.
		 */
		card = mmc_alloc_card(host, &mmc_type);
		if (IS_ERR(card)) {
			err = PTR_ERR(card);
			goto err;
		}

		card->type = MMC_TYPE_MMC;
		card->rca = 1;
		memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
	}

	/*
	 * For native busses:  set card RCA and quit open drain mode.
	 */
	if (!mmc_host_is_spi(host)) {
		err = mmc_set_relative_addr(card);
		if (err)
			goto free_card;

		mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
	}

	if (!oldcard) {
		/*
		 * Fetch CSD from card.
		 */
		err = mmc_send_csd(card, card->raw_csd);
		if (err)
			goto free_card;

		err = mmc_decode_csd(card);
		if (err)
			goto free_card;
		err = mmc_decode_cid(card);
		if (err)
			goto free_card;
	}

	/*
	 * Select card, as all following commands rely on that.
	 */
	if (!mmc_host_is_spi(host)) {
		err = mmc_select_card(card);
		if (err)
			goto free_card;
	}

	if (!oldcard) {
		/*
		 * Fetch and process extended CSD.
		 */
		err = mmc_read_ext_csd(card);
		if (err)
			goto free_card;
	}

	/*
	 * 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);
		if (err && err != -EBADMSG)
			goto free_card;

		if (err) {
			printk(KERN_WARNING "%s: switch to highspeed failed\n",
			       mmc_hostname(card->host));
			err = 0;
		} else {
			mmc_card_set_highspeed(card);
			mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
		}
	}

	/*
	 * Compute bus speed.
	 */
	max_dtr = (unsigned int)-1;

	if (mmc_card_highspeed(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;
	}

	mmc_set_clock(host, max_dtr);

	/*
	 * Activate wide bus (if supported).
	 */
	if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) &&
	    (host->caps & (MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA))) {
		unsigned ext_csd_bit, bus_width;

		if (host->caps & MMC_CAP_8_BIT_DATA) {
			pr_info("Setting the bus width to 8 bit\n");
			ext_csd_bit = EXT_CSD_BUS_WIDTH_8;
			bus_width = MMC_BUS_WIDTH_8;
		} else if (host->caps & MMC_CAP_4_BIT_DATA) {
			pr_info("Setting the bus width to 4 bit\n");
			ext_csd_bit = EXT_CSD_BUS_WIDTH_4;
			bus_width = MMC_BUS_WIDTH_4;
		} else {
			pr_info("Setting the bus width to 1 bit\n");
			ext_csd_bit = EXT_CSD_BUS_WIDTH_1;
			bus_width = MMC_BUS_WIDTH_1;
		}
		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
				 EXT_CSD_BUS_WIDTH, ext_csd_bit);

		if (err && err != -EBADMSG)
			goto free_card;

		if (err) {
			printk(KERN_WARNING "%s: switch to bus width %d "
			       "failed\n", mmc_hostname(card->host),
			       1 << bus_width);
			err = 0;
		} else {
			mmc_set_bus_width(card->host, bus_width);
		}
	}

	if (!oldcard)
		host->card = card;

	return 0;

free_card:
	if (!oldcard)
		mmc_remove_card(card);
err:

	return err;
}
Exemplo n.º 3
0
/*
 * Handle the detection and initialisation of a card.
 *
 * In the case of a resume, "oldcard" will contain the card
 * we're trying to reinitialise.
 */
static int mmc_init_card(struct mmc_host *host, u32 ocr,
	struct mmc_card *oldcard)
{
	struct mmc_card *card;
	int err, ddr = 0;
	u32 cid[4];
	unsigned int max_dtr;
	u32 rocr;
	u8 *ext_csd = NULL;

	BUG_ON(!host);
	WARN_ON(!host->claimed);

	/*
	 * 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(host);

	/* The extra bit indicates that we support high capacity */
	err = mmc_send_op_cond(host, ocr | MMC_CARD_SECTOR_ADDR, &rocr);
	if (err)
		goto err;

	/*
	 * For SPI, enable CRC as appropriate.
	 */
	if (mmc_host_is_spi(host)) {
		err = mmc_spi_set_crc(host, use_spi_crc);
		if (err)
			goto err;
	}

	/*
	 * Fetch CID from card.
	 */
	if (mmc_host_is_spi(host))
		err = mmc_send_cid(host, cid);
	else
		err = mmc_all_send_cid(host, cid);
	if (err)
		goto err;

	if (oldcard) {
		if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
			err = -ENOENT;
			goto err;
		}

		card = oldcard;
	} else {
		/*
		 * Allocate card structure.
		 */
		card = mmc_alloc_card(host, &mmc_type);
		if (IS_ERR(card)) {
			err = PTR_ERR(card);
			goto err;
		}

		card->type = MMC_TYPE_MMC;
		card->rca = 1;
		memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
	}

	/*
	 * For native busses:  set card RCA and quit open drain mode.
	 */
	if (!mmc_host_is_spi(host)) {
		err = mmc_set_relative_addr(card);
		if (err)
			goto free_card;

		mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
	}

	if (!oldcard) {
		/*
		 * Fetch CSD from card.
		 */
		err = mmc_send_csd(card, card->raw_csd);
		if (err)
			goto free_card;

		err = mmc_decode_csd(card);
		if (err)
			goto free_card;
		err = mmc_decode_cid(card);
		if (err)
			goto free_card;
	}

	/*
	 * Select card, as all following commands rely on that.
	 */
	if (!mmc_host_is_spi(host)) {
		err = mmc_select_card(card);
		if (err)
			goto free_card;
	}

	if (!oldcard) {
		/*
		 * Fetch and process extended CSD.
		 */

		err = mmc_get_ext_csd(card, &ext_csd);
		if (err)
			goto free_card;
		err = mmc_read_ext_csd(card, ext_csd);
		if (err)
			goto free_card;

		/* If doing byte addressing, check if required to do sector
		 * addressing.  Handle the case of <2GB cards needing sector
		 * addressing.  See section 8.1 JEDEC Standard JED84-A441;
		 * ocr register has bit 30 set for sector addressing.
		 */
		if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30)))
			mmc_card_set_blockaddr(card);

		/* Erase size depends on CSD and Extended CSD */
		mmc_set_erase_size(card);

		if (card->ext_csd.sectors && (rocr & MMC_CARD_SECTOR_ADDR))
			mmc_card_set_blockaddr(card);
	}

	/*
	 * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
	 * bit.  This bit will be lost every time after a reset or power off.
	 */
	if (card->ext_csd.enhanced_area_en) {
		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
				 EXT_CSD_ERASE_GROUP_DEF, 1, 0);

		if (err && err != -EBADMSG)
			goto free_card;

		if (err) {
			err = 0;
			/*
			 * Just disable enhanced area off & sz
			 * will try to enable ERASE_GROUP_DEF
			 * during next time reinit
			 */
			card->ext_csd.enhanced_area_offset = -EINVAL;
			card->ext_csd.enhanced_area_size = -EINVAL;
		} else {
			card->ext_csd.erase_group_def = 1;
			/*
			 * enable ERASE_GRP_DEF successfully.
			 * This will affect the erase size, so
			 * here need to reset erase size
			 */
			mmc_set_erase_size(card);
		}
	}

	/*
	 * Ensure eMMC user default partition is enabled
	 */
	if (card->ext_csd.part_config & EXT_CSD_PART_CONFIG_ACC_MASK) {
		card->ext_csd.part_config &= ~EXT_CSD_PART_CONFIG_ACC_MASK;
		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_PART_CONFIG,
				 card->ext_csd.part_config,
				 card->ext_csd.part_time);
		if (err && err != -EBADMSG)
			goto free_card;
	}

	/*
	 * 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);
		if (err && err != -EBADMSG)
			goto free_card;

		if (err) {
			printk(KERN_WARNING "%s: switch to highspeed failed\n",
			       mmc_hostname(card->host));
			err = 0;
		} else {
			mmc_card_set_highspeed(card);
			mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
		}
	}

	/*
	 * Compute bus speed.
	 */
	max_dtr = (unsigned int)-1;

	if (mmc_card_highspeed(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;
	}

	mmc_set_clock(host, max_dtr);

	/*
	 * Indicate DDR mode (if supported).
	 */
	if (mmc_card_highspeed(card)) {
		if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V)
			&& ((host->caps & (MMC_CAP_1_8V_DDR |
			     MMC_CAP_UHS_DDR50))
				== (MMC_CAP_1_8V_DDR | MMC_CAP_UHS_DDR50)))
				ddr = MMC_1_8V_DDR_MODE;
		else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
			&& ((host->caps & (MMC_CAP_1_2V_DDR |
			     MMC_CAP_UHS_DDR50))
				== (MMC_CAP_1_2V_DDR | MMC_CAP_UHS_DDR50)))
				ddr = MMC_1_2V_DDR_MODE;
	}

	/*
	 * Activate wide bus and DDR (if supported).
	 */
	if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) &&
	    (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 },
			{ EXT_CSD_BUS_WIDTH_4, EXT_CSD_DDR_BUS_WIDTH_4 },
			{ EXT_CSD_BUS_WIDTH_1, EXT_CSD_BUS_WIDTH_1 },
		};
		static unsigned bus_widths[] = {
			MMC_BUS_WIDTH_8,
			MMC_BUS_WIDTH_4,
			MMC_BUS_WIDTH_1
		};
		unsigned idx, bus_width = 0;

		if (host->caps & MMC_CAP_8_BIT_DATA)
			idx = 0;
		else
			idx = 1;
		for (; idx < ARRAY_SIZE(bus_widths); idx++) {
			bus_width = bus_widths[idx];
			if (bus_width == MMC_BUS_WIDTH_1)
				ddr = 0; /* no DDR for 1-bit width */
			err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
					 EXT_CSD_BUS_WIDTH,
					 ext_csd_bits[idx][0],
					 0);
			if (!err) {
				mmc_set_bus_width(card->host, bus_width);

				/*
				 * If controller can't handle bus width test,
				 * compare ext_csd previously read in 1 bit mode
				 * against ext_csd at new bus width
				 */
				if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
					err = mmc_compare_ext_csds(card,
						bus_width);
				else
					err = mmc_bus_test(card, bus_width);
				if (!err)
					break;
			}
		}

		if (!err && ddr) {
			err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
					 EXT_CSD_BUS_WIDTH,
					 ext_csd_bits[idx][1],
					 0);
		}
		if (err) {
			printk(KERN_WARNING "%s: switch to bus width %d ddr %d "
				"failed\n", mmc_hostname(card->host),
				1 << bus_width, ddr);
			goto free_card;
		} else if (ddr) {
			/*
			 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
			 * signaling.
			 *
			 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
			 *
			 * 1.8V vccq at 3.3V core voltage (vcc) is not required
			 * in the JEDEC spec for DDR.
			 *
			 * Do not force change in vccq since we are obviously
			 * working and no change to vccq is needed.
			 *
			 * WARNING: eMMC rules are NOT the same as SD DDR
			 */
			if (ddr == MMC_1_2V_DDR_MODE) {
				err = mmc_set_signal_voltage(host,
					MMC_SIGNAL_VOLTAGE_120, 0);
				if (err)
					goto err;
			}
			mmc_card_set_ddr_mode(card);
			mmc_set_timing(card->host, MMC_TIMING_UHS_DDR50);
			mmc_set_bus_width(card->host, bus_width);
		}
	}

	if (!oldcard)
		host->card = card;

	mmc_free_ext_csd(ext_csd);
	return 0;

free_card:
	if (!oldcard)
		mmc_remove_card(card);
err:
	mmc_free_ext_csd(ext_csd);

	return err;
}
Exemplo n.º 4
0
/*
 * Handle the detection and initialisation of a card.
 *
 * In the case of a resume, "curcard" will contain the card
 * we're trying to reinitialise.
 */
static int mmc_sd_init_card(struct mmc_host *host, u32 ocr,
	struct mmc_card *oldcard)
{
	struct mmc_card *card;
	int err;
	u32 cid[4];
	unsigned int max_dtr;
	unsigned int card_supports_8bit = 1;

	BUG_ON(!host);
	BUG_ON(!host->claimed);

	/*
	 * 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(host);

	/* The extra bit indicates that we support high capacity */
	err = mmc_send_op_cond(host, ocr | (1 << 30), &ocr);
	if (err != MMC_ERR_NONE)
		goto err;

	/*
	 * Fetch CID from card.
	 */
	err = mmc_all_send_cid(host, cid);
	if (err != MMC_ERR_NONE)
		goto err;

	if (oldcard) {
		if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0)
			goto err;

		card = oldcard;
	} else {
		/*
		 * Allocate card structure.
		 */
		card = mmc_alloc_card(host);
		if (IS_ERR(card))
			goto err;

		card->type = MMC_TYPE_MMC;
		card->rca = 1;
		memcpy(card->raw_cid, cid, sizeof(card->raw_cid));

		printk(KERN_WARNING "[kwwo]%s: mmc-card detected\n",	mmc_hostname(card->host));
	}

	/*
	 * Set card RCA.
	 */
	err = mmc_set_relative_addr(card);
	if (err != MMC_ERR_NONE)
		goto free_card;

	mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);

	if (!oldcard) {
		/*
		 * Fetch CSD from card.
		 */
		err = mmc_send_csd(card, card->raw_csd);
		if (err != MMC_ERR_NONE)
			goto free_card;

		err = mmc_decode_csd(card);
		if (err < 0)
			goto free_card;
		err = mmc_decode_cid(card);
		if (err < 0)
			goto free_card;
	}

	/*
	 * Select card, as all following commands rely on that.
	 */
	err = mmc_select_card(card);
	if (err != MMC_ERR_NONE)
		goto free_card;

	if (!oldcard) {
		/*
		 * Fetch and process extened CSD.
		 */
		err = mmc_read_ext_csd(card);
		if (err != MMC_ERR_NONE)
			goto free_card;
	}

	/*
	 * Activate block addressing mode (if supported)
	 */
	if ( (ocr & (3 << 29)) == (2 << 29))
		mmc_card_set_blockaddr(card);

	/*
	 * 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);
		if (err != MMC_ERR_NONE)
			goto free_card;

		mmc_card_set_highspeed(card);

		mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
	}

	/*
	 * Compute bus speed.
	 */
	max_dtr = (unsigned int)-1;

	if (mmc_card_highspeed(card)) {
		if (max_dtr > card->ext_csd.hs_max_dtr)
			max_dtr = card->ext_csd.hs_max_dtr;
			printk(KERN_INFO "[kwwo]%s: hs ext_csd.hs_max_dtr=%d\n",	mmc_hostname(card->host), max_dtr);
	} else if (max_dtr > card->csd.max_dtr) {
		max_dtr = card->csd.max_dtr;
		printk(KERN_WARNING "[kwwo]%s: csd.max_dtr=%d\n", mmc_hostname(card->host), max_dtr);
		/* Limit 32nm MoviNAND MMC clock under 20MHz*/
		if ( max_dtr > 20000000 ) {
			max_dtr = 20000000;
			printk(KERN_WARNING "MMC clk forced max. 20 MHz (16.5MHz)\n");
		}
	}

	/*  Workarounds for buggy cards */
	if (card->cid.manfid == MMC_MANUFACTURER_SAMSUNG) {
		const int spare4bmaxspeed = 34700000;
		switch (card->cid.prv) {
			case 0x1b:
			case 0x16:
				if (max_dtr > spare4bmaxspeed) {
					/* reduce clock to below 34.7 MHz, 4 bit mode */
					max_dtr = spare4bmaxspeed;
					card_supports_8bit = 0;
					printk(KERN_INFO "MMC: enabling workaround for movinand spare4b issue\n");
				}
				break;
		}
	}

	mmc_set_clock(host, max_dtr);

	/*
	 * Activate wide bus (if supported).
	 */
	if( card->csd.mmca_vsn >= CSD_SPEC_VER_4 )
	{
#ifdef CONFIG_MMC_8_BIT_TRANSFERS
		if ( (host->caps & MMC_CAP_8_BIT_DATA) && (card_supports_8bit) )
		{
			err = mmc_switch( card, EXT_CSD_CMD_SET_NORMAL,
				EXT_CSD_BUS_WIDTH, EXT_CSD_BUS_WIDTH_8 );
			if( err != MMC_ERR_NONE )
				goto free_card;

			mmc_set_bus_width( card->host, MMC_BUS_WIDTH_8 );
		}
		else
#endif
		if( host->caps & MMC_CAP_4_BIT_DATA )
		{
			err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
				EXT_CSD_BUS_WIDTH, EXT_CSD_BUS_WIDTH_4);
			if (err != MMC_ERR_NONE)
				goto free_card;

			mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
		}
	}

	if (!oldcard)
		host->card = card;

	return MMC_ERR_NONE;

free_card:
	if (!oldcard)
		mmc_remove_card(card);
err:

	return MMC_ERR_FAILED;
}
Exemplo n.º 5
0
/*
 * Handle the detection and initialisation of a card.
 *
 * In the case of a resume, "oldcard" will contain the card
 * we're trying to reinitialise.
 */
static int mmc_init_card(struct mmc_host *host, u32 ocr,
	struct mmc_card *oldcard)
{
	struct mmc_card *card;
	int err, ddr = 0;
	u32 cid[4];
	unsigned int max_dtr;
	u32 rocr;

	BUG_ON(!host);
	WARN_ON(!host->claimed);

	/*
	 * 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(host);

	/* The extra bit indicates that we support high capacity */
	err = mmc_send_op_cond(host, ocr | (1 << 30), &rocr);
	if (err)
		goto err;

	/*
	 * For SPI, enable CRC as appropriate.
	 */
	if (mmc_host_is_spi(host)) {
		err = mmc_spi_set_crc(host, use_spi_crc);
		if (err)
			goto err;
	}

	/*
	 * Fetch CID from card.
	 */
	if (mmc_host_is_spi(host))
		err = mmc_send_cid(host, cid);
	else
		err = mmc_all_send_cid(host, cid);
	if (err)
		goto err;

	if (oldcard) {
		if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
			err = -ENOENT;
			goto err;
		}

		card = oldcard;
	} else {
		/*
		 * Allocate card structure.
		 */
		card = mmc_alloc_card(host, &mmc_type);
		if (IS_ERR(card)) {
			err = PTR_ERR(card);
			goto err;
		}

		card->type = MMC_TYPE_MMC;
		card->rca = 1;
		memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
	}

	/*
	 * For native busses:  set card RCA and quit open drain mode.
	 */
	if (!mmc_host_is_spi(host)) {
		err = mmc_set_relative_addr(card);
		if (err)
			goto free_card;

		mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
	}

	if (!oldcard) {
		/*
		 * Fetch CSD from card.
		 */
		err = mmc_send_csd(card, card->raw_csd);
		if (err)
			goto free_card;

		err = mmc_decode_csd(card);
		if (err)
			goto free_card;
		err = mmc_decode_cid(card);
		if (err)
			goto free_card;
	}

	/*
	 * Select card, as all following commands rely on that.
	 */
	if (!mmc_host_is_spi(host)) {
		err = mmc_select_card(card);
		if (err)
			goto free_card;
	}

	if (!oldcard) {
		/*
		 * Fetch and process extended CSD.
		 */
		err = mmc_read_ext_csd(card);
		if (err)
			goto free_card;

		/* If doing byte addressing, check if required to do sector
		 * addressing.  Handle the case of <2GB cards needing sector
		 * addressing.  See section 8.1 JEDEC Standard JED84-A441;
		 * ocr register has bit 30 set for sector addressing.
		 */
		if (!(mmc_card_blockaddr(card)) && (rocr & (1<<30)))
			mmc_card_set_blockaddr(card);

		/* Erase size depends on CSD and Extended CSD */
		mmc_set_erase_size(card);
	}

	/* htc: For SanDisk X3, we have to enable power class 4 */
	if (card->cid.manfid == 0x45) {
		if (card->ext_csd.sectors > 33554432) { /* the storage size larger than 16GB */
			if (card->ext_csd.max_enh_size_mult < 0xEC) {
				err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL, EXT_CSD_POWER_CLASS, 4); 
				if (err && err != -EBADMSG)
					goto free_card;

				if (err) {
					printk(KERN_WARNING "%s: switch to power class 4 failed\n",
						mmc_hostname(card->host));
					err = 0;
				} else {
					printk(KERN_WARNING "%s: switch to power class 4 sucessfully\n",
						mmc_hostname(card->host));
				}
			}
		}
	}

	/*
	 * If enhanced_area_en is TRUE, host needs to enable ERASE_GRP_DEF
	 * bit.  This bit will be lost every time after a reset or power off.
	 */
		/* htc: set ERASE_GRP_DET to 1 anyway */
		//if (card->ext_csd.enhanced_area_en) {
		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
				EXT_CSD_ERASE_GROUP_DEF, 1);

		if (err && err != -EBADMSG)
			goto free_card;

		if (err) {
			err = 0;
			/*
			 * Just disable enhanced area off & sz
			 * will try to enable ERASE_GROUP_DEF
			 * during next time reinit
			 */
			card->ext_csd.enhanced_area_offset = -EINVAL;
			card->ext_csd.enhanced_area_size = -EINVAL;
		} else {
			card->ext_csd.erase_group_def = 1;
			/*
			 * enable ERASE_GRP_DEF successfully.
			 * This will affect the erase size, so
			 * here need to reset erase size
			 */
			mmc_set_erase_size(card);
		}
	//}

	/**
	 * Enable boot mode (if not enabled yet)
	 */
#if 0
	if (card->ext_csd.part_conf != 0x48) {
		printk(KERN_INFO "%s: Got default part_conf setting, modify it...\n",
			mmc_hostname(card->host));

		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
			EXT_CSD_PARTITION_CFG, 0x48);

		if (err && err != -EBADMSG) {
			printk(KERN_ERR "%s: switch command to set EXT_CSD_PARTITION_CONFIG failed\n",
				mmc_hostname(card->host));
			goto free_card;
		} else {
			printk(KERN_INFO "%s: boot_mode is enabled\n",
				mmc_hostname(card->host));
		}
	}
#endif
	/*
	 * 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);
		if (err && err != -EBADMSG)
			goto free_card;

		if (err) {
			printk(KERN_WARNING "%s: switch to highspeed failed\n",
			       mmc_hostname(card->host));
			err = 0;
		} else {
			mmc_card_set_highspeed(card);
			mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
		}
	}

	/*
	 * Enable HPI feature (if supported)
	 */
	if (card->ext_csd.hpi && (card->host->caps & MMC_CAP_BKOPS)) {
		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
			EXT_CSD_HPI_MGMT, 1);
		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;
		}
	}

	/*
	 * Enable Background ops feature (if supported)
	 */
	if (card->ext_csd.bk_ops && (card->host->caps & MMC_CAP_BKOPS)) {
		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
			EXT_CSD_BKOPS_EN, 1);
		if (err && err != -EBADMSG)
			goto free_card;
		if (err) {
			pr_warning("%s: Enabling BK ops failed\n",
				   mmc_hostname(card->host));
			err = 0;
		} else {
			card->ext_csd.bk_ops_en = 1;
		}
	}

	/*
	 * Compute bus speed.
	 */
	max_dtr = (unsigned int)-1;

	if (mmc_card_highspeed(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;
	}

	mmc_set_clock(host, max_dtr);

	/* TODO workaround for SanDisk X3 eMMC */
	if (card->cid.manfid == 0x45) {
		if (card->ext_csd.sectors > 33554432) { /* the storage size larger than 16GB */
			printk(KERN_INFO "%s: Force to use SDR for SanDisk X3\n", mmc_hostname(card->host));
			host->caps &= ~MMC_CAP_1_8V_DDR;
			host->caps &= ~MMC_CAP_1_2V_DDR;
			host->caps &= ~MMC_CAP_UHS_DDR50;
		}
	}

	/*
	 * Indicate DDR mode (if supported).
	 */
	if (mmc_card_highspeed(card)) {
		if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V)
			&& ((host->caps & (MMC_CAP_1_8V_DDR |
			     MMC_CAP_UHS_DDR50))
				== (MMC_CAP_1_8V_DDR | MMC_CAP_UHS_DDR50)))
				ddr = MMC_1_8V_DDR_MODE;
		else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
			&& ((host->caps & (MMC_CAP_1_2V_DDR |
			     MMC_CAP_UHS_DDR50))
				== (MMC_CAP_1_2V_DDR | MMC_CAP_UHS_DDR50)))
				ddr = MMC_1_2V_DDR_MODE;
	}

	/*
	 * Activate wide bus and DDR (if supported).
	 */
	if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) &&
	    (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 },
			{ EXT_CSD_BUS_WIDTH_4, EXT_CSD_DDR_BUS_WIDTH_4 },
			{ EXT_CSD_BUS_WIDTH_1, EXT_CSD_BUS_WIDTH_1 },
		};
		static unsigned bus_widths[] = {
			MMC_BUS_WIDTH_8,
			MMC_BUS_WIDTH_4,
			MMC_BUS_WIDTH_1
		};
		unsigned idx, bus_width = 0;

		if (host->caps & MMC_CAP_8_BIT_DATA)
			idx = 0;
		else
			idx = 1;
		for (; idx < ARRAY_SIZE(bus_widths); idx++) {
			bus_width = bus_widths[idx];
			if (bus_width == MMC_BUS_WIDTH_1)
				ddr = 0; /* no DDR for 1-bit width */
			err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
					 EXT_CSD_BUS_WIDTH,
					 ext_csd_bits[idx][0]);
			if (!err) {
				mmc_set_bus_width(card->host, bus_width);
				/*
				 * If controller can't handle bus width test,
				 * use the highest bus width to maintain
				 * compatibility with previous MMC behavior.
				 */
				if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
					break;
				err = mmc_bus_test(card, bus_width);
				if (!err)
					break;
			}
		}

		if (!err && ddr) {
			err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
					EXT_CSD_BUS_WIDTH,
					ext_csd_bits[idx][1]);
		}
		if (err) {
			printk(KERN_WARNING "%s: switch to bus width %d ddr %d "
				"failed\n", mmc_hostname(card->host),
				1 << bus_width, ddr);
			goto free_card;
		} else if (ddr) {
			/*
			 * eMMC cards can support 3.3V to 1.2V i/o (vccq)
			 * signaling.
			 *
			 * EXT_CSD_CARD_TYPE_DDR_1_8V means 3.3V or 1.8V vccq.
			 *
			 * 1.8V vccq at 3.3V core voltage (vcc) is not required
			 * in the JEDEC spec for DDR.
			 *
			 * Do not force change in vccq since we are obviously
			 * working and no change to vccq is needed.
			 *
			 * WARNING: eMMC rules are NOT the same as SD DDR
			 */
			if (ddr == EXT_CSD_CARD_TYPE_DDR_1_2V) {
				err = mmc_set_signal_voltage(host,
					MMC_SIGNAL_VOLTAGE_120);
				if (err)
					goto err;
			}
			mmc_card_set_ddr_mode(card);
			mmc_set_timing(card->host, MMC_TIMING_UHS_DDR50);
			mmc_set_bus_width(card->host, bus_width);
		}
	}

	if (!oldcard)
		host->card = card;

	return 0;

free_card:
	if (!oldcard)
		mmc_remove_card(card);
err:

	return err;
}
Exemplo n.º 6
0
/*
 * Handle the detection and initialisation of a card.
 *
 * In the case of a resume, "oldcard" will contain the card
 * we're trying to reinitialise.
 */
static int mmc_init_card(struct mmc_host *host, u32 ocr,
	struct mmc_card *oldcard)
{
	struct mmc_card *card;
	int err, ddr = 0;
	u32 cid[4];
	unsigned int max_dtr;
	u32 rocr;

	BUG_ON(!host);
	WARN_ON(!host->claimed);

	/*
	 * 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(host);

	/* The extra bit indicates that we support high capacity */
	err = mmc_send_op_cond(host, ocr | MMC_CARD_SECTOR_ADDR, &rocr);
	if (err)
		goto err;

	/*
	 * For SPI, enable CRC as appropriate.
	 */
	if (mmc_host_is_spi(host)) {
		err = mmc_spi_set_crc(host, use_spi_crc);
		if (err)
			goto err;
	}

	/*
	 * Fetch CID from card.
	 */
	if (mmc_host_is_spi(host))
		err = mmc_send_cid(host, cid);
	else
		err = mmc_all_send_cid(host, cid);
	if (err)
		goto err;

	if (oldcard) {
		if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
			err = -ENOENT;
			goto err;
		}

		card = oldcard;
	} else {
		/*
		 * Allocate card structure.
		 */
		card = mmc_alloc_card(host, &mmc_type);
		if (IS_ERR(card)) {
			err = PTR_ERR(card);
			goto err;
		}

		card->type = MMC_TYPE_MMC;
		card->rca = 1;
		memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
	}

	/*
	 * For native busses:  set card RCA and quit open drain mode.
	 */
	if (!mmc_host_is_spi(host)) {
		err = mmc_set_relative_addr(card);
		if (err)
			goto free_card;

		mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
	}

	if (!oldcard) {
		/*
		 * Fetch CSD from card.
		 */
		err = mmc_send_csd(card, card->raw_csd);
		if (err)
			goto free_card;

		err = mmc_decode_csd(card);
		if (err)
			goto free_card;
		err = mmc_decode_cid(card);
		if (err)
			goto free_card;
	}

	/*
	 * Select card, as all following commands rely on that.
	 */
	if (!mmc_host_is_spi(host)) {
		err = mmc_select_card(card);
		if (err)
			goto free_card;
	}

	if (!oldcard) {
		/*
		 * Fetch and process extended CSD.
		 */
		err = mmc_read_ext_csd(card);
		if (err)
			goto free_card;
		/* Erase size depends on CSD and Extended CSD */
		mmc_set_erase_size(card);

		if (card->ext_csd.sectors && (rocr & MMC_CARD_SECTOR_ADDR))
			mmc_card_set_blockaddr(card);
	}

	/*
	 * 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);
		if (err && err != -EBADMSG)
			goto free_card;

		if (err) {
			printk(KERN_WARNING "%s: switch to highspeed failed\n",
			       mmc_hostname(card->host));
			err = 0;
		} else {
			mmc_card_set_highspeed(card);
			mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
		}
	}

	/*
	 * Compute bus speed.
	 */
	max_dtr = (unsigned int)-1;

	if (mmc_card_highspeed(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;
	}

	mmc_set_clock(host, max_dtr);

	/*
	 * Indicate DDR mode (if supported).
	 */
	if (mmc_card_highspeed(card)) {
		if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_8V)
			&& (host->caps & (MMC_CAP_1_8V_DDR)))
				ddr = MMC_1_8V_DDR_MODE;
		else if ((card->ext_csd.card_type & EXT_CSD_CARD_TYPE_DDR_1_2V)
			&& (host->caps & (MMC_CAP_1_2V_DDR)))
				ddr = MMC_1_2V_DDR_MODE;
	}

	/*
	 * Activate wide bus and DDR (if supported).
	 */
	if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) &&
	    (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 },
			{ EXT_CSD_BUS_WIDTH_4, EXT_CSD_DDR_BUS_WIDTH_4 },
			{ EXT_CSD_BUS_WIDTH_1, EXT_CSD_BUS_WIDTH_1 },
		};
		static unsigned bus_widths[] = {
			MMC_BUS_WIDTH_8,
			MMC_BUS_WIDTH_4,
			MMC_BUS_WIDTH_1
		};
		unsigned idx, bus_width = 0;

		if (host->caps & MMC_CAP_8_BIT_DATA)
			idx = 0;
		else
			idx = 1;
		for (; idx < ARRAY_SIZE(bus_widths); idx++) {
			bus_width = bus_widths[idx];
			if (bus_width == MMC_BUS_WIDTH_1)
				ddr = 0; /* no DDR for 1-bit width */
			err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
					 EXT_CSD_BUS_WIDTH,
					 ext_csd_bits[idx][0]);
			if (!err) {
				mmc_set_bus_width_ddr(card->host,
						      bus_width, MMC_SDR_MODE);
				/*
				 * If controller can't handle bus width test,
				 * use the highest bus width to maintain
				 * compatibility with previous MMC behavior.
				 */
				if (!(host->caps & MMC_CAP_BUS_WIDTH_TEST))
					break;
				err = mmc_bus_test(card, bus_width);
				if (!err)
					break;
			}
		}

		if (!err && ddr) {
			err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
					EXT_CSD_BUS_WIDTH,
					ext_csd_bits[idx][1]);
		}
		if (err) {
			printk(KERN_WARNING "%s: switch to bus width %d ddr %d "
				"failed\n", mmc_hostname(card->host),
				1 << bus_width, ddr);
			goto free_card;
		} else if (ddr) {
			mmc_card_set_ddr_mode(card);
			mmc_set_bus_width_ddr(card->host, bus_width, ddr);
		}
	}

	if (!oldcard)
		host->card = card;

	return 0;

free_card:
	if (!oldcard)
		mmc_remove_card(card);
err:

	return err;
}
Exemplo n.º 7
0
static void
mmc_discover_cards(struct mmc_softc *sc)
{
	struct mmc_ivars *ivar = NULL;
	device_t *devlist;
	int err, i, devcount, newcard;
	uint32_t raw_cid[4];
	uint32_t resp, sec_count;
	device_t child;
	uint16_t rca = 2;
	u_char switch_res[64];

	if (bootverbose || mmc_debug)
		device_printf(sc->dev, "Probing cards\n");
	while (1) {
		err = mmc_all_send_cid(sc, raw_cid);
		if (err == MMC_ERR_TIMEOUT)
			break;
		if (err != MMC_ERR_NONE) {
			device_printf(sc->dev, "Error reading CID %d\n", err);
			break;
		}
		newcard = 1;
		if ((err = device_get_children(sc->dev, &devlist, &devcount)) != 0)
			return;
		for (i = 0; i < devcount; i++) {
			ivar = device_get_ivars(devlist[i]);
			if (memcmp(ivar->raw_cid, raw_cid, sizeof(raw_cid)) == 0) {
				newcard = 0;
				break;
			}
		}
		kfree(devlist, M_TEMP);
		if (bootverbose || mmc_debug) {
			device_printf(sc->dev, "%sard detected (CID %08x%08x%08x%08x)\n",
			    newcard ? "New c" : "C",
			    raw_cid[0], raw_cid[1], raw_cid[2], raw_cid[3]);
		}
		if (newcard) {
			ivar = kmalloc(sizeof(struct mmc_ivars), M_DEVBUF,
			    M_WAITOK | M_ZERO);
			memcpy(ivar->raw_cid, raw_cid, sizeof(raw_cid));
		}
		if (mmcbr_get_ro(sc->dev))
			ivar->read_only = 1;
		ivar->bus_width = bus_width_1;
		ivar->timing = bus_timing_normal;
		ivar->mode = mmcbr_get_mode(sc->dev);
		if (ivar->mode == mode_sd) {
			mmc_decode_cid_sd(ivar->raw_cid, &ivar->cid);
			mmc_send_relative_addr(sc, &resp);
			ivar->rca = resp >> 16;
			/* Get card CSD. */
			mmc_send_csd(sc, ivar->rca, ivar->raw_csd);
			mmc_decode_csd_sd(ivar->raw_csd, &ivar->csd);
			ivar->sec_count = ivar->csd.capacity / MMC_SECTOR_SIZE;
			if (ivar->csd.csd_structure > 0)
				ivar->high_cap = 1;
			ivar->tran_speed = ivar->csd.tran_speed;
			ivar->erase_sector = ivar->csd.erase_sector *
			    ivar->csd.write_bl_len / MMC_SECTOR_SIZE;
			/* Get card SCR. Card must be selected to fetch it. */
			mmc_select_card(sc, ivar->rca);
			mmc_app_send_scr(sc, ivar->rca, ivar->raw_scr);
			mmc_app_decode_scr(ivar->raw_scr, &ivar->scr);
			/* Get card switch capabilities (command class 10). */
			if ((ivar->scr.sda_vsn >= 1) &&
			    (ivar->csd.ccc & (1<<10))) {
				mmc_sd_switch(sc, SD_SWITCH_MODE_CHECK,
				    SD_SWITCH_GROUP1, SD_SWITCH_NOCHANGE,
				    switch_res);
				if (switch_res[13] & 2) {
					ivar->timing = bus_timing_hs;
					ivar->hs_tran_speed = SD_MAX_HS;
				}
			}
			mmc_app_sd_status(sc, ivar->rca, ivar->raw_sd_status);
			mmc_app_decode_sd_status(ivar->raw_sd_status,
			    &ivar->sd_status);
			if (ivar->sd_status.au_size != 0) {
				ivar->erase_sector =
				    16 << ivar->sd_status.au_size;
			}
			mmc_select_card(sc, 0);
			/* Find max supported bus width. */
			if ((mmcbr_get_caps(sc->dev) & MMC_CAP_4_BIT_DATA) &&
			    (ivar->scr.bus_widths & SD_SCR_BUS_WIDTH_4))
				ivar->bus_width = bus_width_4;
			if (bootverbose || mmc_debug)
				mmc_log_card(sc->dev, ivar, newcard);
			if (newcard) {
				/* Add device. */
				child = device_add_child(sc->dev, NULL, -1);
				device_set_ivars(child, ivar);
			}
			return;
		}
		mmc_decode_cid_mmc(ivar->raw_cid, &ivar->cid);
		ivar->rca = rca++;
		mmc_set_relative_addr(sc, ivar->rca);
		/* Get card CSD. */
		mmc_send_csd(sc, ivar->rca, ivar->raw_csd);
		mmc_decode_csd_mmc(ivar->raw_csd, &ivar->csd);
		ivar->sec_count = ivar->csd.capacity / MMC_SECTOR_SIZE;
		ivar->tran_speed = ivar->csd.tran_speed;
		ivar->erase_sector = ivar->csd.erase_sector *
		    ivar->csd.write_bl_len / MMC_SECTOR_SIZE;
		/* Only MMC >= 4.x cards support EXT_CSD. */
		if (ivar->csd.spec_vers >= 4) {
			/* Card must be selected to fetch EXT_CSD. */
			mmc_select_card(sc, ivar->rca);
			mmc_send_ext_csd(sc, ivar->raw_ext_csd);
			/* Handle extended capacity from EXT_CSD */
			sec_count = ivar->raw_ext_csd[EXT_CSD_SEC_CNT] +
			    (ivar->raw_ext_csd[EXT_CSD_SEC_CNT + 1] << 8) +
			    (ivar->raw_ext_csd[EXT_CSD_SEC_CNT + 2] << 16) +
			    (ivar->raw_ext_csd[EXT_CSD_SEC_CNT + 3] << 24);
			if (sec_count != 0) {
				ivar->sec_count = sec_count;
				ivar->high_cap = 1;
			}
			/* Get card speed in high speed mode. */
			ivar->timing = bus_timing_hs;
			if (ivar->raw_ext_csd[EXT_CSD_CARD_TYPE]
			    & EXT_CSD_CARD_TYPE_52)
				ivar->hs_tran_speed = MMC_TYPE_52_MAX_HS;
			else if (ivar->raw_ext_csd[EXT_CSD_CARD_TYPE]
			    & EXT_CSD_CARD_TYPE_26)
				ivar->hs_tran_speed = MMC_TYPE_26_MAX_HS;
			else
				ivar->hs_tran_speed = ivar->tran_speed;
			/* Find max supported bus width. */
			ivar->bus_width = mmc_test_bus_width(sc);
			mmc_select_card(sc, 0);
			/* Handle HC erase sector size. */
			if (ivar->raw_ext_csd[EXT_CSD_ERASE_GRP_SIZE] != 0) {
				ivar->erase_sector = 1024 *
				    ivar->raw_ext_csd[EXT_CSD_ERASE_GRP_SIZE];
				mmc_switch(sc, EXT_CSD_CMD_SET_NORMAL,
				    EXT_CSD_ERASE_GRP_DEF, 1);
			}
		} else {
			ivar->bus_width = bus_width_1;
			ivar->timing = bus_timing_normal;
		}
		if (bootverbose || mmc_debug)
			mmc_log_card(sc->dev, ivar, newcard);
		if (newcard) {
			/* Add device. */
			child = device_add_child(sc->dev, NULL, -1);
			device_set_ivars(child, ivar);
		}
	}
Exemplo n.º 8
0
Arquivo: mmc.c Projeto: mozyg/kernel
/*
 * Handle the detection and initialisation of a card.
 *
 * In the case of a resume, "curcard" will contain the card
 * we're trying to reinitialise.
 */
static int mmc_init_card(struct mmc_host *host, u32 ocr,
	struct mmc_card *oldcard)
{
	struct mmc_card *card;
	int err;
	u32 cid[4];
	unsigned int max_dtr;

	BUG_ON(!host);
	WARN_ON(!host->claimed);

	/*
	 * 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(host);

	/* The extra bit indicates that we support high capacity */
	err = mmc_send_op_cond(host, ocr | (1 << 30), NULL);
	if (err)
		goto err;

	/*
	 * For SPI, enable CRC as appropriate.
	 */
	if (mmc_host_is_spi(host)) {
		err = mmc_spi_set_crc(host, use_spi_crc);
		if (err)
			goto err;
	}

	/*
	 * Fetch CID from card.
	 */
	if (mmc_host_is_spi(host))
		err = mmc_send_cid(host, cid);
	else
		err = mmc_all_send_cid(host, cid);
	if (err)
		goto err;

	if (oldcard) {
		if (memcmp(cid, oldcard->raw_cid, sizeof(cid)) != 0) {
			err = -ENOENT;
			goto err;
		}

		card = oldcard;
	} else {
		/*
		 * Allocate card structure.
		 */
		card = mmc_alloc_card(host);
		if (IS_ERR(card)) {
			err = PTR_ERR(card);
			goto err;
		}

		card->type = MMC_TYPE_MMC;
		host->mode = MMC_MODE_MMC;
		card->rca = 1;
		memcpy(card->raw_cid, cid, sizeof(card->raw_cid));
	}

	/*
	 * For native busses:  set card RCA and quit open drain mode.
	 */
	if (!mmc_host_is_spi(host)) {
		err = mmc_set_relative_addr(card);
		if (err)
			goto free_card;

		mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
	}

	if (!oldcard) {
		/*
		 * Fetch CSD from card.
		 */
		err = mmc_send_csd(card, card->raw_csd);
		if (err)
			goto free_card;

		err = mmc_decode_csd(card);
		if (err)
			goto free_card;
		err = mmc_decode_cid(card);
		if (err)
			goto free_card;
	}

	/*
	 * Select card, as all following commands rely on that.
	 */
	if (!mmc_host_is_spi(host)) {
		err = mmc_select_card(card);
		if (err)
			goto free_card;
	}

	if (!oldcard) {
		/*
		 * Fetch and process extended CSD.
		 */
		err = mmc_read_ext_csd(card);
		if (err)
			goto free_card;
	}

	/*
	 * Activate high speed (if supported)
	 */
	if ((card->ext_csd.hs_max_dtr != 0) &&
		(host->caps & MMC_CAP_MMC_HIGHSPEED)) {
		err = mmc_execute_switch(card, EXT_CSD_CMD_SET_NORMAL,
			EXT_CSD_HS_TIMING, 1);
		if (err)
			goto free_card;

		mmc_card_set_highspeed(card);

		mmc_set_timing(card->host, MMC_TIMING_MMC_HS);
	}

	/*
	 * Compute bus speed.
	 */
	max_dtr = (unsigned int)-1;

	if (mmc_card_highspeed(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;
	}

	mmc_set_clock(host, max_dtr);

	/*
	 * HACK: some devices, Hynix flash in particular, seem
	 * to need a little pause here or it wont respond to any
	 * further commands.
	 */
//	msleep(10);
	mdelay(10);

	/*
	 * Activate wide bus (if supported).
	 */
	if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) &&
		(host->caps & MMC_CAP_8_BIT_DATA)) {
		err = mmc_execute_switch(card, EXT_CSD_CMD_SET_NORMAL,
			EXT_CSD_BUS_WIDTH, EXT_CSD_BUS_WIDTH_8);
		if (err)
			goto free_card;
		mmc_set_bus_width(card->host, MMC_BUS_WIDTH_8);
	} else if ((card->csd.mmca_vsn >= CSD_SPEC_VER_4) &&
		(host->caps & MMC_CAP_4_BIT_DATA)) {
		err = mmc_execute_switch(card, EXT_CSD_CMD_SET_NORMAL,
			EXT_CSD_BUS_WIDTH, EXT_CSD_BUS_WIDTH_4);
		if (err)
			goto free_card;
		mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
	}

	if (!oldcard)
		host->card = card;

	return 0;

free_card:
	if (!oldcard)
		mmc_remove_card(card);
err:

	return err;
}