[ARM] S3C64XX: Add S3C6400 SDHCI setup support

Add support for S3C6400 SDHCI channels 0 and 1, making
the GPIO code common to both S3C6400 and S3C6410.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>

4 files changed, 80 insertions, 1 deletions

diff --git a/arch/arm/mach-s3c6400/Kconfig b/arch/arm/mach-s3c6400/Kconfig
index f0292a8cddd..f5af212066c 100644
--- a/arch/arm/mach-s3c6400/Kconfig
+++ b/arch/arm/mach-s3c6400/Kconfig
@@ -14,11 +14,18 @@ config CPU_S3C6400
         help
           Enable S3C6400 CPU support
 
+config S3C6400_SETUP_SDHCI
+        bool
+        help
+          Internal configuration for default SDHCI
+          setup for S3C6400.
+
 # S36400 Macchine support
 
 config MACH_SMDK6400
        bool "SMDK6400"
         select CPU_S3C6400
         select S3C_DEV_HSMMC
+        select S3C6400_SETUP_SDHCI
         help
           Machine support for the Samsung SMDK6400
diff --git a/arch/arm/mach-s3c6400/Makefile b/arch/arm/mach-s3c6400/Makefile
index 07eac2be6f6..df1ce4aa03e 100644
--- a/arch/arm/mach-s3c6400/Makefile
+++ b/arch/arm/mach-s3c6400/Makefile
@@ -14,6 +14,10 @@ obj-				:=
 
 obj-$(CONFIG_CPU_S3C6400)       += s3c6400.o
 
+# setup support
+
+obj-$(CONFIG_S3C6400_SETUP_SDHCI) += setup-sdhci.o
+
 # Machine support
 
 obj-$(CONFIG_MACH_SMDK6400)     += mach-smdk6400.o
diff --git a/arch/arm/mach-s3c6400/s3c6400.c b/arch/arm/mach-s3c6400/s3c6400.c
index d11a4272b94..bd17f3db2c2 100644
--- a/arch/arm/mach-s3c6400/s3c6400.c
+++ b/arch/arm/mach-s3c6400/s3c6400.c
@@ -40,7 +40,12 @@
 
 void __init s3c6400_map_io(void)
 {
-        /* the i2c device is directly compatible with s3c2440 */
+        /* setup SDHCI */
+
+        s3c6400_default_sdhci0();
+        s3c6400_default_sdhci1();
+
+        /* the i2c devices are directly compatible with s3c2440 */
         s3c_i2c0_setname("s3c2440-i2c");
 }
 
diff --git a/arch/arm/mach-s3c6400/setup-sdhci.c b/arch/arm/mach-s3c6400/setup-sdhci.c
new file mode 100644
index 00000000000..b93dafbee1f
--- /dev/null
+++ b/arch/arm/mach-s3c6400/setup-sdhci.c
@@ -0,0 +1,63 @@
+/* linux/arch/arm/mach-s3c6410/setup-sdhci.c
+ *
+ * Copyright 2008 Simtec Electronics
+ * Copyright 2008 Simtec Electronics
+ *      Ben Dooks <ben@simtec.co.uk>
+ *      http://armlinux.simtec.co.uk/
+ *
+ * S3C6410 - Helper functions for settign up SDHCI device(s) (HSMMC)
+ *
+ * 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 *s3c6400_hsmmc_clksrcs[4] = {
+        [0] = "hsmmc",
+        [1] = "hsmmc",
+        [2] = "mmc_bus",
+        /* [3] = "48m", - note not succesfully used yet */
+};
+
+void s3c6400_setup_sdhci_cfg_card(struct platform_device *dev,
+                                  void __iomem *r,
+                                  struct mmc_ios *ios,
+                                  struct mmc_card *card)
+{
+        u32 ctrl2, ctrl3;
+
+        ctrl2 = 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);
+
+        printk(KERN_INFO "%s: CTRL 2=%08x, 3=%08x\n", __func__, ctrl2, ctrl3);
+        writel(ctrl2, r + S3C_SDHCI_CONTROL2);
+        writel(ctrl3, r + S3C_SDHCI_CONTROL3);
+}
+