On Mar 11, 2010, at 9:17 PM, Philip Rakity wrote:
> MMC 4.4 Spec JEDEC Standard No. 84-A44 says CMD1 response from card
> has bit 30 set if card is high capacity. (page 111 - Section 8.1)
>
> Toshiba flash <= 2GB has EXT_CSD sectors but does not support
> High Capacity but because of bad test -- card was put into sector mode
> causing failure.
>
> Signed-off-by: Philip Rakity <prak...@marvell.com>
>
> diff -ru linux-2.6.32.8/drivers/mmc/core/mmc.c linux-2.6.32.8
> copy/drivers/mmc/core/mmc.c
> --- linux-2.6.32.8/drivers/mmc/core/mmc.c 2010-02-09 04:57:19.000000000
> -0800
> +++ linux-2.6.32.8 copy/drivers/mmc/core/mmc.c 2010-03-11
> 14:15:03.000000000 -0800
> @@ -221,8 +221,6 @@
> 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 (card->ext_csd.sectors)
> - mmc_card_set_blockaddr(card);
> }
>
> switch (ext_csd[EXT_CSD_CARD_TYPE]) {
> @@ -306,6 +304,7 @@
> int err;
> u32 cid[4];
> unsigned int max_dtr;
> + u32 rocr;
>
> BUG_ON(!host);
> WARN_ON(!host->claimed);
> @@ -319,7 +318,7 @@
> mmc_go_idle(host);
>
> /* The extra bit indicates that we support high capacity */
> - err = mmc_send_op_cond(host, ocr | (1 << 30), NULL);
> + err = mmc_send_op_cond(host, ocr | MMC_CARD_SECTOR_ADDR, &rocr);
> if (err)
> goto err;
>
> @@ -407,6 +406,9 @@
> err = mmc_read_ext_csd(card);
> if (err)
> goto free_card;
> +
> + if(rocr & MMC_CARD_SECTOR_ADDR)
> + mmc_card_set_blockaddr(card);
> }
>
> /*
> diff -ru linux-2.6.32.8/include/linux/mmc/mmc.h linux-2.6.32.8
> copy/include/linux/mmc/mmc.h
> --- linux-2.6.32.8/include/linux/mmc/mmc.h 2010-02-09 04:57:19.000000000
> -0800
> +++ linux-2.6.32.8 copy/include/linux/mmc/mmc.h 2010-03-11
> 13:47:00.000000000 -0800
> @@ -202,6 +202,7 @@
> * OCR bits are mostly in host.h
> */
> #define MMC_CARD_BUSY 0x80000000 /* Card Power up status bit */
> +#define MMC_CARD_SECTOR_ADDR 0x40000000 /* Card supports sectors */
>
> /*
> * Card Command Classes (CCC)
> <eMMCHighCapacity.patch>
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