mmc: quirks: Extends card quirks with MMC/SD quirks matching the CID.

The current mechanism is SDIO-only. This allows us to create
function-specific quirks, without creating messy Kconfig dependencies,
or polluting core/ with function-specific code.

Signed-off-by: Andrei Warkentin <andreiw@motorola.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Chris Ball <cjb@laptop.org>

1 files changed, 90 insertions, 1 deletions

diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 2a7e54970c93..c6513175f7f1 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -11,6 +11,7 @@
 #define LINUX_MMC_CARD_H
 
 #include <linux/mmc/core.h>
+#include <linux/mod_devicetable.h>
 
 struct mmc_cid {
         unsigned int            manfid;
@@ -157,7 +158,92 @@ struct mmc_card {
         struct dentry           *debugfs_root;
 };
 
-void mmc_fixup_device(struct mmc_card *dev);
+/*
+ *  The world is not perfect and supplies us with broken mmc/sdio devices.
+ *  For at least some of these bugs we need a work-around.
+ */
+
+struct mmc_fixup {
+        /* CID-specific fields. */
+        const char *name;
+
+        /* Valid revision range */
+        u64 rev_start, rev_end;
+
+        unsigned int manfid;
+        unsigned short oemid;
+
+        /* SDIO-specfic fields. You can use SDIO_ANY_ID here of course */
+        u16 cis_vendor, cis_device;
+
+        void (*vendor_fixup)(struct mmc_card *card, int data);
+        int data;
+};
+
+#define CID_MANFID_ANY (-1ul)
+#define CID_OEMID_ANY ((unsigned short) -1)
+#define CID_NAME_ANY (NULL)
+
+#define END_FIXUP { 0 }
+
+#define _FIXUP_EXT(_name, _manfid, _oemid, _rev_start, _rev_end,        \
+                   _cis_vendor, _cis_device,                            \
+                   _fixup, _data)                                       \
+        {                                                  \
+                .name = (_name),                           \
+                .manfid = (_manfid),                       \
+                .oemid = (_oemid),                         \
+                .rev_start = (_rev_start),                 \
+                .rev_end = (_rev_end),                     \
+                .cis_vendor = (_cis_vendor),               \
+                .cis_device = (_cis_device),               \
+                .vendor_fixup = (_fixup),                  \
+                .data = (_data),                           \
+         }
+
+#define MMC_FIXUP_REV(_name, _manfid, _oemid, _rev_start, _rev_end,     \
+                      _fixup, _data)                                    \
+        _FIXUP_EXT(_name, _manfid,                                      \
+                   _oemid, _rev_start, _rev_end,                        \
+                   SDIO_ANY_ID, SDIO_ANY_ID,                            \
+                   _fixup, _data)                                       \
+
+#define MMC_FIXUP(_name, _manfid, _oemid, _fixup, _data) \
+        MMC_FIXUP_REV(_name, _manfid, _oemid, 0, -1ull, _fixup, _data)
+
+#define SDIO_FIXUP(_vendor, _device, _fixup, _data)                     \
+        _FIXUP_EXT(CID_NAME_ANY, CID_MANFID_ANY,                        \
+                    CID_OEMID_ANY, 0, -1ull,                            \
+                   _vendor, _device,                                    \
+                   _fixup, _data)                                       \
+
+#define cid_rev(hwrev, fwrev, year, month)      \
+        (((u64) hwrev) << 40 |                  \
+         ((u64) fwrev) << 32 |                  \
+         ((u64) year) << 16 |                   \
+         ((u64) month))
+
+#define cid_rev_card(card)                \
+        cid_rev(card->cid.hwrev,          \
+                    card->cid.fwrev,      \
+                    card->cid.year,       \
+                    card->cid.month)
+
+/*
+ * This hook just adds a quirk unconditionally.
+ */
+static inline void __maybe_unused add_quirk(struct mmc_card *card, int data)
+{
+        card->quirks |= data;
+}
+
+/*
+ * This hook just removes a quirk unconditionally.
+ */
+static inline void __maybe_unused remove_quirk(struct mmc_card *card, int data)
+{
+        card->quirks &= ~data;
+}
 
 #define mmc_card_mmc(c)         ((c)->type == MMC_TYPE_MMC)
 #define mmc_card_sd(c)          ((c)->type == MMC_TYPE_SD)
@@ -218,4 +304,7 @@ struct mmc_driver {
 extern int mmc_register_driver(struct mmc_driver *);
 extern void mmc_unregister_driver(struct mmc_driver *);
 
+extern void mmc_fixup_device(struct mmc_card *card,
+                             const struct mmc_fixup *table);
+
 #endif