diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0352-mmc-Add-card_quirks-module-parameter-log-quirks.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0352-mmc-Add-card_quirks-module-parameter-log-quirks.patch | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0352-mmc-Add-card_quirks-module-parameter-log-quirks.patch b/target/linux/brcm2708/patches-4.4/0352-mmc-Add-card_quirks-module-parameter-log-quirks.patch new file mode 100644 index 0000000000..97fe268e18 --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0352-mmc-Add-card_quirks-module-parameter-log-quirks.patch @@ -0,0 +1,76 @@ +From 2b859a1735c3113756c172ab8113f3f764c49c38 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.org> +Date: Fri, 20 May 2016 10:11:43 +0100 +Subject: [PATCH] mmc: Add card_quirks module parameter, log quirks + +Use mmc_block.card_quirks to override the quirks for all SD or MMC +cards. The value is a bitfield using the bit positions defined in +include/linux/mmc/card.h. If the module parameter is placed in the +kernel command line (or bootargs) stored on the card then, assuming the +device only has one SD card interface, the override effectively becomes +card-specific. + +Signed-off-by: Phil Elwell <phil@raspberrypi.org> +--- + drivers/mmc/card/block.c | 28 +++++++++++++++++++++++++--- + 1 file changed, 25 insertions(+), 3 deletions(-) + +--- a/drivers/mmc/card/block.c ++++ b/drivers/mmc/card/block.c +@@ -137,6 +137,13 @@ enum { + module_param(perdev_minors, int, 0444); + MODULE_PARM_DESC(perdev_minors, "Minors numbers to allocate per device"); + ++/* ++ * Allow quirks to be overridden for the current card ++ */ ++static char *card_quirks; ++module_param(card_quirks, charp, 0644); ++MODULE_PARM_DESC(card_quirks, "Force the use of the indicated quirks (a bitfield)"); ++ + static inline int mmc_blk_part_switch(struct mmc_card *card, + struct mmc_blk_data *md); + static int get_card_status(struct mmc_card *card, u32 *status, int retries); +@@ -2570,6 +2577,7 @@ static int mmc_blk_probe(struct mmc_card + { + struct mmc_blk_data *md, *part_md; + char cap_str[10]; ++ char quirk_str[24]; + + /* + * Check that the card supports the command class(es) we need. +@@ -2577,7 +2585,16 @@ static int mmc_blk_probe(struct mmc_card + if (!(card->csd.cmdclass & CCC_BLOCK_READ)) + return -ENODEV; + +- mmc_fixup_device(card, blk_fixups); ++ if (card_quirks) { ++ unsigned long quirks; ++ if (kstrtoul(card_quirks, 0, &quirks) == 0) ++ card->quirks = (unsigned int)quirks; ++ else ++ pr_err("mmc_block: Invalid card_quirks parameter '%s'\n", ++ card_quirks); ++ } ++ else ++ mmc_fixup_device(card, blk_fixups); + + md = mmc_blk_alloc(card); + if (IS_ERR(md)) +@@ -2585,9 +2602,14 @@ static int mmc_blk_probe(struct mmc_card + + string_get_size((u64)get_capacity(md->disk), 512, STRING_UNITS_2, + cap_str, sizeof(cap_str)); +- pr_info("%s: %s %s %s %s\n", ++ if (card->quirks) ++ snprintf(quirk_str, sizeof(quirk_str), ++ " (quirks 0x%08x)", card->quirks); ++ else ++ quirk_str[0] = '\0'; ++ pr_info("%s: %s %s %s%s%s\n", + md->disk->disk_name, mmc_card_id(card), mmc_card_name(card), +- cap_str, md->read_only ? "(ro)" : ""); ++ cap_str, md->read_only ? " (ro)" : "", quirk_str); + + if (mmc_blk_alloc_parts(card, md)) + goto out; |