mirror of https://gitee.com/openkylin/linux.git
85 lines
2.0 KiB
C
85 lines
2.0 KiB
C
/*
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* This file contains work-arounds for many known sdio hardware
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* bugs.
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*
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* Copyright (c) 2011 Pierre Tardy <tardyp@gmail.com>
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* Inspired from pci fixup code:
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* Copyright (c) 1999 Martin Mares <mj@ucw.cz>
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*
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*/
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/mmc/card.h>
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#include <linux/mod_devicetable.h>
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/*
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* The world is not perfect and supplies us with broken mmc/sdio devices.
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* For at least a part of these bugs we need a work-around
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*/
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struct mmc_fixup {
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u16 vendor, device; /* You can use SDIO_ANY_ID here of course */
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void (*vendor_fixup)(struct mmc_card *card, int data);
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int data;
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};
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/*
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* This hook just adds a quirk unconditionnally
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*/
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static void __maybe_unused add_quirk(struct mmc_card *card, int data)
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{
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card->quirks |= data;
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}
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/*
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* This hook just removes a quirk unconditionnally
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*/
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static void __maybe_unused remove_quirk(struct mmc_card *card, int data)
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{
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card->quirks &= ~data;
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}
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/*
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* This hook just adds a quirk for all sdio devices
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*/
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static void add_quirk_for_sdio_devices(struct mmc_card *card, int data)
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{
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if (mmc_card_sdio(card))
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card->quirks |= data;
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}
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#ifndef SDIO_VENDOR_ID_TI
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#define SDIO_VENDOR_ID_TI 0x0097
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#endif
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#ifndef SDIO_DEVICE_ID_TI_WL1271
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#define SDIO_DEVICE_ID_TI_WL1271 0x4076
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#endif
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static const struct mmc_fixup mmc_fixup_methods[] = {
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/* by default sdio devices are considered CLK_GATING broken */
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/* good cards will be whitelisted as they are tested */
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{ SDIO_ANY_ID, SDIO_ANY_ID,
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add_quirk_for_sdio_devices, MMC_QUIRK_BROKEN_CLK_GATING },
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{ SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271,
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remove_quirk, MMC_QUIRK_BROKEN_CLK_GATING },
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{ 0 }
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};
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void mmc_fixup_device(struct mmc_card *card)
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{
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const struct mmc_fixup *f;
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for (f = mmc_fixup_methods; f->vendor_fixup; f++) {
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if ((f->vendor == card->cis.vendor
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|| f->vendor == (u16) SDIO_ANY_ID) &&
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(f->device == card->cis.device
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|| f->device == (u16) SDIO_ANY_ID)) {
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dev_dbg(&card->dev, "calling %pF\n", f->vendor_fixup);
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f->vendor_fixup(card, f->data);
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}
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}
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}
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EXPORT_SYMBOL(mmc_fixup_device);
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