sdhci-of: fix high-speed cards recognition
eSDHC fails to recognize some SDHS cards, throwing timeout errors: mmc0: error -110 whilst initialising SD card That's because we calculate timeout value in a wrong way: on eSDHC hosts the timeout clock is derivied from the SD clock, which is set dynamically. As David Vrabel suggested, deriving timeout clock from SD clock is a common scheme, so let's implement DATA_TIMEOUT_USES_SDCLK quirk and use it for eSDHC hosts. Also, from now on we don't need esdhc_get_timeout_clock() callback, so remove it. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Cc: Pierre Ossman <pierre@ossman.eu> Cc: Kumar Gala <galak@kernel.crashing.org> Cc: David Vrabel <david.vrabel@csr.com> Cc: Ben Dooks <ben@fluff.org> Cc: Sascha Hauer <s.hauer@pengutronix.de> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -172,19 +172,13 @@ static unsigned int esdhc_get_min_clock(struct sdhci_host *host)
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return of_host->clock / 256 / 16;
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}
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static unsigned int esdhc_get_timeout_clock(struct sdhci_host *host)
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{
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struct sdhci_of_host *of_host = sdhci_priv(host);
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return of_host->clock / 1000;
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}
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static struct sdhci_of_data sdhci_esdhc = {
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.quirks = SDHCI_QUIRK_FORCE_BLK_SZ_2048 |
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SDHCI_QUIRK_BROKEN_CARD_DETECTION |
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SDHCI_QUIRK_INVERTED_WRITE_PROTECT |
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SDHCI_QUIRK_NO_BUSY_IRQ |
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SDHCI_QUIRK_NONSTANDARD_CLOCK |
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SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK |
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SDHCI_QUIRK_PIO_NEEDS_DELAY |
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SDHCI_QUIRK_RESTORE_IRQS_AFTER_RESET |
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SDHCI_QUIRK_NO_CARD_NO_RESET,
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@ -199,7 +193,6 @@ static struct sdhci_of_data sdhci_esdhc = {
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.enable_dma = esdhc_enable_dma,
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.get_max_clock = esdhc_get_max_clock,
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.get_min_clock = esdhc_get_min_clock,
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.get_timeout_clock = esdhc_get_timeout_clock,
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},
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};
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@ -591,6 +591,9 @@ static u8 sdhci_calc_timeout(struct sdhci_host *host, struct mmc_data *data)
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target_timeout = data->timeout_ns / 1000 +
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data->timeout_clks / host->clock;
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if (host->quirks & SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK)
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host->timeout_clk = host->clock / 1000;
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/*
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* Figure out needed cycles.
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* We do this in steps in order to fit inside a 32 bit int.
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@ -1757,13 +1760,15 @@ int sdhci_add_host(struct sdhci_host *host)
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host->timeout_clk =
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(caps & SDHCI_TIMEOUT_CLK_MASK) >> SDHCI_TIMEOUT_CLK_SHIFT;
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if (host->timeout_clk == 0) {
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if (!host->ops->get_timeout_clock) {
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if (host->ops->get_timeout_clock) {
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host->timeout_clk = host->ops->get_timeout_clock(host);
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} else if (!(host->quirks &
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SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK)) {
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printk(KERN_ERR
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"%s: Hardware doesn't specify timeout clock "
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"frequency.\n", mmc_hostname(mmc));
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return -ENODEV;
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}
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host->timeout_clk = host->ops->get_timeout_clock(host);
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}
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if (caps & SDHCI_TIMEOUT_CLK_UNIT)
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host->timeout_clk *= 1000;
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@ -232,6 +232,8 @@ struct sdhci_host {
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#define SDHCI_QUIRK_FORCE_1_BIT_DATA (1<<22)
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/* Controller needs 10ms delay between applying power and clock */
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#define SDHCI_QUIRK_DELAY_AFTER_POWER (1<<23)
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/* Controller uses SDCLK instead of TMCLK for data timeouts */
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#define SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK (1<<24)
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int irq; /* Device IRQ */
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void __iomem * ioaddr; /* Mapped address */
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