The patch titled
sdio: allow non-standard SDIO cards
has been added to the -mm tree. Its filename is
sdio-allow-non-standard-sdio-cards.patch
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------------------------------------------------------
Subject: sdio: allow non-standard SDIO cards
From: Grazvydas Ignotas <[email protected]>
There are some chips (like TI WL12xx series) that can be interfaced over
SDIO but don't support the SDIO specification, meaning that they are
missing CIA (Common I/O Area) with all it's registers. Current Linux SDIO
implementation relies on those registers to identify and configure the
card, so non-standard cards can not function and cause lots of warnings
from the core when it reads invalid data from non-existent registers.
After this patch, init_card() host callback can now set new quirk
MMC_QUIRK_NONSTD_SDIO, which means that SDIO core should not try to access
any standard SDIO registers and rely on init_card() to fill all SDIO
structures instead. As those cards are usually embedded chips, all the
required information can be obtained from machine board files by the host
driver when it's called through init_card() callback.
Signed-off-by: Grazvydas Ignotas <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Tony Lindgren <[email protected]>
Cc: Bob Copeland <[email protected]>
Cc: Kalle Valo <[email protected]>
Cc: Madhusudhan Chikkature <[email protected]>
Cc: Kishore Kadiyala <[email protected]>
Cc: Russell King <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---
drivers/mmc/core/sdio.c | 36 ++++++++++++++++++++++++++++++------
include/linux/mmc/card.h | 2 ++
2 files changed, 32 insertions(+), 6 deletions(-)
diff -puN drivers/mmc/core/sdio.c~sdio-allow-non-standard-sdio-cards
drivers/mmc/core/sdio.c
--- a/drivers/mmc/core/sdio.c~sdio-allow-non-standard-sdio-cards
+++ a/drivers/mmc/core/sdio.c
@@ -63,13 +63,19 @@ static int sdio_init_func(struct mmc_car
func->num = fn;
- ret = sdio_read_fbr(func);
- if (ret)
- goto fail;
+ if (!(card->quirks & MMC_QUIRK_NONSTD_SDIO)) {
+ ret = sdio_read_fbr(func);
+ if (ret)
+ goto fail;
- ret = sdio_read_func_cis(func);
- if (ret)
- goto fail;
+ ret = sdio_read_func_cis(func);
+ if (ret)
+ goto fail;
+ } else {
+ func->vendor = func->card->cis.vendor;
+ func->device = func->card->cis.device;
+ func->max_blksize = func->card->cis.blksize;
+ }
card->sdio_func[fn - 1] = func;
@@ -412,6 +418,23 @@ static int mmc_sdio_init_card(struct mmc
goto remove;
}
+ if (card->quirks & MMC_QUIRK_NONSTD_SDIO) {
+ /*
+ * This is non-standard SDIO device, meaning it doesn't
+ * have any CIA (Common I/O area) registers present.
+ * It's host's responsibility to fill cccr and cis
+ * structures in init_card().
+ */
+ mmc_set_clock(host, card->cis.max_dtr);
+
+ if (card->cccr.high_speed) {
+ mmc_card_set_highspeed(card);
+ mmc_set_timing(card->host, MMC_TIMING_SD_HS);
+ }
+
+ goto finish;
+ }
+
/*
* Read the common registers.
*/
@@ -480,6 +503,7 @@ static int mmc_sdio_init_card(struct mmc
else if (err)
goto remove;
+finish:
if (!oldcard)
host->card = card;
return 0;
diff -puN include/linux/mmc/card.h~sdio-allow-non-standard-sdio-cards
include/linux/mmc/card.h
--- a/include/linux/mmc/card.h~sdio-allow-non-standard-sdio-cards
+++ a/include/linux/mmc/card.h
@@ -103,6 +103,8 @@ struct mmc_card {
#define MMC_QUIRK_LENIENT_FN0 (1<<0) /* allow SDIO FN0 writes
outside of the VS CCCR range */
#define MMC_QUIRK_BLKSZ_FOR_BYTE_MODE (1<<1) /* use func->cur_blksize */
/* for byte mode */
+#define MMC_QUIRK_NONSTD_SDIO (1<<2) /* non-standard SDIO card
attached */
+ /* (missing CIA registers) */
u32 raw_cid[4]; /* raw card CID */
u32 raw_csd[4]; /* raw card CSD */
_
Patches currently in -mm which might be from [email protected] are
linux-next.patch
sdio-allow-non-standard-sdio-cards.patch
omap_hsmmc-add-init_card-pass-through-callback.patch
omap-pandora-pass-wl1251-information-to-sdio-core.patch
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