]> git.karo-electronics.de Git - mv-sheeva.git/blobdiff - arch/arm/mach-s3c2416/setup-sdhci.c
Merge tag 'v2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[mv-sheeva.git] / arch / arm / mach-s3c2416 / setup-sdhci.c
diff --git a/arch/arm/mach-s3c2416/setup-sdhci.c b/arch/arm/mach-s3c2416/setup-sdhci.c
new file mode 100644 (file)
index 0000000..ed34fad
--- /dev/null
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+/* linux/arch/arm/mach-s3c2416/setup-sdhci.c
+ *
+ * Copyright 2010 Promwad Innovation Company
+ *     Yauhen Kharuzhy <yauhen.kharuzhy@promwad.com>
+ *
+ * S3C2416 - Helper functions for settign up SDHCI device(s) (HSMMC)
+ *
+ * Based on mach-s3c64xx/setup-sdhci.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+
+#include <linux/mmc/card.h>
+#include <linux/mmc/host.h>
+
+#include <plat/regs-sdhci.h>
+#include <plat/sdhci.h>
+
+/* clock sources for the mmc bus clock, order as for the ctrl2[5..4] */
+
+char *s3c2416_hsmmc_clksrcs[4] = {
+       [0] = "hsmmc",
+       [1] = "hsmmc",
+       [2] = "hsmmc-if",
+       /* [3] = "48m", - note not successfully used yet */
+};
+
+void s3c2416_setup_sdhci_cfg_card(struct platform_device *dev,
+                                 void __iomem *r,
+                                 struct mmc_ios *ios,
+                                 struct mmc_card *card)
+{
+       u32 ctrl2, ctrl3;
+
+       ctrl2 = __raw_readl(r + S3C_SDHCI_CONTROL2);
+       ctrl2 &= S3C_SDHCI_CTRL2_SELBASECLK_MASK;
+       ctrl2 |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR |
+                 S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK |
+                 S3C_SDHCI_CTRL2_ENFBCLKRX |
+                 S3C_SDHCI_CTRL2_DFCNT_NONE |
+                 S3C_SDHCI_CTRL2_ENCLKOUTHOLD);
+
+       if (ios->clock < 25 * 1000000)
+               ctrl3 = (S3C_SDHCI_CTRL3_FCSEL3 |
+                        S3C_SDHCI_CTRL3_FCSEL2 |
+                        S3C_SDHCI_CTRL3_FCSEL1 |
+                        S3C_SDHCI_CTRL3_FCSEL0);
+       else
+               ctrl3 = (S3C_SDHCI_CTRL3_FCSEL1 | S3C_SDHCI_CTRL3_FCSEL0);
+
+       __raw_writel(ctrl2, r + S3C_SDHCI_CONTROL2);
+       __raw_writel(ctrl3, r + S3C_SDHCI_CONTROL3);
+}