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authorBen Dooks <ben-linux@fluff.org>2009-03-25 11:01:24 +0000
committerBen Dooks <ben-linux@fluff.org>2009-05-07 11:04:58 +0100
commit4faf6867638cc21aa43b4ca4ed0bdf14a2d29762 (patch)
tree1fed91079785469a6f044900bd322166df37adbf /arch/arm/mach-s3c6400
parente074f9803227236252c8e7be16d836d709abff57 (diff)
[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>
Diffstat (limited to 'arch/arm/mach-s3c6400')
-rw-r--r--arch/arm/mach-s3c6400/Kconfig7
-rw-r--r--arch/arm/mach-s3c6400/Makefile4
-rw-r--r--arch/arm/mach-s3c6400/s3c6400.c7
-rw-r--r--arch/arm/mach-s3c6400/setup-sdhci.c63
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);
+}
+