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mmc: sdio: fall back to SDIO 1.0 for broken 1.1 cards

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I have two SDIO WLAN cards which specify being SDIO Rev. 1.1 cards but
their FUNCE tuple reports the smaller size of a Rev 1.0 card. So,
enforce 1.0 on these cards to avoid reading the not present registers.
They are not really used anyhow. My cards initialize properly after this
patch.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Wolfram Sang 2016-05-09 09:59:59 +02:00 committed by Ulf Hansson
parent 5b5fe95a69
commit 88ea46bcbf
1 changed files with 6 additions and 1 deletions
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7
drivers/mmc/core/sdio_cis.c
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@ -177,8 +177,13 @@ static int cistpl_funce_func(struct mmc_card *card, struct sdio_func *func,
vsn = func->card->cccr.sdio_vsn;
min_size = (vsn == SDIO_SDIO_REV_1_00) ? 28 : 42;
if (size < min_size)
if (size == 28 && vsn == SDIO_SDIO_REV_1_10) {
pr_warn("%s: card has broken SDIO 1.1 CIS, forcing SDIO 1.0\n",
mmc_hostname(card->host));
vsn = SDIO_SDIO_REV_1_00;
} else if (size < min_size) {
return -EINVAL;
}
/* TPLFE_MAX_BLK_SIZE */
func->max_blksize = buf[12] | (buf[13] << 8);