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authorBen Dooks <ben-linux@fluff.org>2008-10-31 16:14:38 +0000
committerBen Dooks <ben-linux@fluff.org>2008-12-15 23:39:34 +0000
commit5cc7fd88fc96072c333184ff359c818665ce2506 (patch)
tree5a91059f40729d6581bc477c0ef4421b681f42b7 /arch/arm/mach-s3c6410/setup-sdhci.c
parentea522c7a54a1422b3ce8a1b9888f2108541ba047 (diff)
[ARM] S3C6410: Add helper for setting SDHCI device information
Add the necessary helper functions for setting up the SDHCI device information. Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Diffstat (limited to 'arch/arm/mach-s3c6410/setup-sdhci.c')
-rw-r--r--arch/arm/mach-s3c6410/setup-sdhci.c102
1 files changed, 102 insertions, 0 deletions
diff --git a/arch/arm/mach-s3c6410/setup-sdhci.c b/arch/arm/mach-s3c6410/setup-sdhci.c
new file mode 100644
index 00000000000..0b5788bd598
--- /dev/null
+++ b/arch/arm/mach-s3c6410/setup-sdhci.c
@@ -0,0 +1,102 @@
+/* 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 <mach/gpio.h>
+#include <plat/gpio-cfg.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 *s3c6410_hsmmc_clksrcs[4] = {
+ [0] = "hsmmc",
+ [1] = "hsmmc",
+ [2] = "mmc_bus",
+ /* [3] = "48m", - note not succesfully used yet */
+};
+
+void s3c6410_setup_sdhci0_cfg_gpio(struct platform_device *dev, int width)
+{
+ unsigned int gpio;
+ unsigned int end;
+
+ end = S3C64XX_GPG(2 + width);
+
+ /* Set all the necessary GPG pins to special-function 0 */
+ for (gpio = S3C64XX_GPG(0); gpio < end; gpio++) {
+ s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+ s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+ }
+
+ s3c_gpio_setpull(S3C64XX_GPG(6), S3C_GPIO_PULL_UP);
+ s3c_gpio_cfgpin(S3C64XX_GPG(6), S3C_GPIO_SFN(2));
+}
+
+void s3c6410_setup_sdhci0_cfg_card(struct platform_device *dev,
+ void __iomem *r,
+ struct mmc_ios *ios,
+ struct mmc_card *card)
+{
+ u32 ctrl2, ctrl3;
+
+ /* don't need to alter anything acording to card-type */
+
+ writel(S3C64XX_SDHCI_CONTROL4_DRIVE_9mA, r + S3C64XX_SDHCI_CONTROL4);
+
+ 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);
+}
+
+void s3c6410_setup_sdhci1_cfg_gpio(struct platform_device *dev, int width)
+{
+ unsigned int gpio;
+ unsigned int end;
+
+ end = S3C64XX_GPH(2 + width);
+
+ /* Set all the necessary GPG pins to special-function 0 */
+ for (gpio = S3C64XX_GPH(0); gpio < end; gpio++) {
+ s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
+ s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
+ }
+
+ s3c_gpio_setpull(S3C64XX_GPG(6), S3C_GPIO_PULL_UP);
+ s3c_gpio_cfgpin(S3C64XX_GPG(6), S3C_GPIO_SFN(3));
+}