Pierre Tardy | 57f0adc | 2011-02-06 19:03:46 +0100 | [diff] [blame] | 1 | /* |
| 2 | * This file contains work-arounds for many known sdio hardware |
| 3 | * bugs. |
| 4 | * |
| 5 | * Copyright (c) 2011 Pierre Tardy <tardyp@gmail.com> |
| 6 | * Inspired from pci fixup code: |
| 7 | * Copyright (c) 1999 Martin Mares <mj@ucw.cz> |
| 8 | * |
| 9 | */ |
| 10 | |
| 11 | #include <linux/types.h> |
| 12 | #include <linux/kernel.h> |
| 13 | #include <linux/mmc/card.h> |
| 14 | #include <linux/mod_devicetable.h> |
| 15 | |
| 16 | /* |
| 17 | * The world is not perfect and supplies us with broken mmc/sdio devices. |
| 18 | * For at least a part of these bugs we need a work-around |
| 19 | */ |
| 20 | |
| 21 | struct mmc_fixup { |
| 22 | u16 vendor, device; /* You can use SDIO_ANY_ID here of course */ |
| 23 | void (*vendor_fixup)(struct mmc_card *card, int data); |
| 24 | int data; |
| 25 | }; |
| 26 | |
| 27 | /* |
| 28 | * This hook just adds a quirk unconditionnally |
| 29 | */ |
| 30 | static void __maybe_unused add_quirk(struct mmc_card *card, int data) |
| 31 | { |
| 32 | card->quirks |= data; |
| 33 | } |
| 34 | |
| 35 | /* |
| 36 | * This hook just removes a quirk unconditionnally |
| 37 | */ |
| 38 | static void __maybe_unused remove_quirk(struct mmc_card *card, int data) |
| 39 | { |
| 40 | card->quirks &= ~data; |
| 41 | } |
| 42 | |
Pierre Tardy | db993500 | 2011-02-06 19:03:47 +0100 | [diff] [blame] | 43 | /* |
| 44 | * This hook just adds a quirk for all sdio devices |
| 45 | */ |
| 46 | static void add_quirk_for_sdio_devices(struct mmc_card *card, int data) |
| 47 | { |
| 48 | if (mmc_card_sdio(card)) |
| 49 | card->quirks |= data; |
| 50 | } |
| 51 | |
Pierre Tardy | 12f8ef8 | 2011-02-06 19:04:17 +0100 | [diff] [blame] | 52 | #ifndef SDIO_VENDOR_ID_TI |
| 53 | #define SDIO_VENDOR_ID_TI 0x0097 |
| 54 | #endif |
| 55 | |
| 56 | #ifndef SDIO_DEVICE_ID_TI_WL1271 |
| 57 | #define SDIO_DEVICE_ID_TI_WL1271 0x4076 |
| 58 | #endif |
| 59 | |
Pierre Tardy | 57f0adc | 2011-02-06 19:03:46 +0100 | [diff] [blame] | 60 | static const struct mmc_fixup mmc_fixup_methods[] = { |
Pierre Tardy | db993500 | 2011-02-06 19:03:47 +0100 | [diff] [blame] | 61 | /* by default sdio devices are considered CLK_GATING broken */ |
| 62 | /* good cards will be whitelisted as they are tested */ |
| 63 | { SDIO_ANY_ID, SDIO_ANY_ID, |
Pierre Tardy | 12f8ef8 | 2011-02-06 19:04:17 +0100 | [diff] [blame] | 64 | add_quirk_for_sdio_devices, MMC_QUIRK_BROKEN_CLK_GATING }, |
| 65 | { SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271, |
| 66 | remove_quirk, MMC_QUIRK_BROKEN_CLK_GATING }, |
Pierre Tardy | 57f0adc | 2011-02-06 19:03:46 +0100 | [diff] [blame] | 67 | { 0 } |
| 68 | }; |
| 69 | |
| 70 | void mmc_fixup_device(struct mmc_card *card) |
| 71 | { |
| 72 | const struct mmc_fixup *f; |
| 73 | |
| 74 | for (f = mmc_fixup_methods; f->vendor_fixup; f++) { |
| 75 | if ((f->vendor == card->cis.vendor |
| 76 | || f->vendor == (u16) SDIO_ANY_ID) && |
| 77 | (f->device == card->cis.device |
| 78 | || f->device == (u16) SDIO_ANY_ID)) { |
| 79 | dev_dbg(&card->dev, "calling %pF\n", f->vendor_fixup); |
| 80 | f->vendor_fixup(card, f->data); |
| 81 | } |
| 82 | } |
| 83 | } |
| 84 | EXPORT_SYMBOL(mmc_fixup_device); |