mmc: sdhci-pci: add 8-bit bus width support for mrst hc0
And hook platform_8bit_width to support 8-bit bus width. Signed-off-by: Major Lee <major_lee@wistron.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com> Signed-off-by: Chris Ball <cjb@laptop.org>
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@ -143,6 +143,12 @@ static const struct sdhci_pci_fixes sdhci_cafe = {
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SDHCI_QUIRK_BROKEN_TIMEOUT_VAL,
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};
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static int mrst_hc_probe_slot(struct sdhci_pci_slot *slot)
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{
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slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA;
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return 0;
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}
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/*
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* ADMA operation is disabled for Moorestown platform due to
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* hardware bugs.
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@ -159,6 +165,7 @@ static int mrst_hc_probe(struct sdhci_pci_chip *chip)
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static const struct sdhci_pci_fixes sdhci_intel_mrst_hc0 = {
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.quirks = SDHCI_QUIRK_BROKEN_ADMA | SDHCI_QUIRK_NO_HISPD_BIT,
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.probe_slot = mrst_hc_probe_slot,
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};
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static const struct sdhci_pci_fixes sdhci_intel_mrst_hc1_hc2 = {
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@ -789,8 +796,34 @@ static int sdhci_pci_enable_dma(struct sdhci_host *host)
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return 0;
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}
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static int sdhci_pci_8bit_width(struct sdhci_host *host, int width)
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{
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u8 ctrl;
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ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
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switch (width) {
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case MMC_BUS_WIDTH_8:
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ctrl |= SDHCI_CTRL_8BITBUS;
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ctrl &= ~SDHCI_CTRL_4BITBUS;
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break;
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case MMC_BUS_WIDTH_4:
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ctrl |= SDHCI_CTRL_4BITBUS;
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ctrl &= ~SDHCI_CTRL_8BITBUS;
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break;
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default:
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ctrl &= ~(SDHCI_CTRL_8BITBUS | SDHCI_CTRL_4BITBUS);
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break;
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}
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sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
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return 0;
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}
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static struct sdhci_ops sdhci_pci_ops = {
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.enable_dma = sdhci_pci_enable_dma,
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.platform_8bit_width = sdhci_pci_8bit_width,
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};
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/*****************************************************************************\
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