[ARM] S3C6410: Add helper for setting SDHCI device information
authorBen Dooks <ben-linux@fluff.org>
Fri, 31 Oct 2008 16:14:38 +0000 (16:14 +0000)
committerBen Dooks <ben-linux@fluff.org>
Mon, 15 Dec 2008 23:39:34 +0000 (23:39 +0000)
Add the necessary helper functions for setting up the SDHCI
device information.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
arch/arm/mach-s3c6410/Kconfig
arch/arm/mach-s3c6410/Makefile
arch/arm/mach-s3c6410/cpu.c
arch/arm/mach-s3c6410/setup-sdhci.c [new file with mode: 0644]
arch/arm/plat-s3c/dev-hsmmc.c
arch/arm/plat-s3c/include/plat/sdhci.h [new file with mode: 0644]

index d7ccc269086c69f563c0aa1c42b0f466c1cec730..32bdc93fc1ff2e05eca64d7b8ba6f20d637ed3c3 100644 (file)
@@ -14,9 +14,15 @@ config CPU_S3C6410
        help
          Enable S3C6410 CPU support
 
+config S3C6410_SETUP_SDHCI
+       bool
+       help
+         Internal helper functions for S3C6410 based SDHCI systems
+
 config MACH_SMDK6410
        bool "SMDK6410"
        select CPU_S3C6410
        select S3C_DEV_HSMMC
+       select S3C6410_SETUP_SDHCI
        help
          Machine support for the Samsung SMDK6410
index 4a20a009990a999aa5985f26899c36183d9667a7..2cd4f189036bc77c89117682a25cfccc467d4951 100644 (file)
@@ -14,6 +14,10 @@ obj-                         :=
 
 obj-$(CONFIG_CPU_S3C6410)      += cpu.o
 
+# Helper and device support
+
+obj-$(CONFIG_S3C6410_SETUP_SDHCI)      += setup-sdhci.o
+
 # machine support
 
 obj-$(CONFIG_MACH_SMDK6410)    += mach-smdk6410.o
index 975cf88f0e847d58f76c00e1dc9824ecd9b646a3..84fb65b599999438c5c8de7c38758f995cdd651f 100644 (file)
@@ -35,6 +35,7 @@
 #include <plat/cpu.h>
 #include <plat/devs.h>
 #include <plat/clock.h>
+#include <plat/sdhci.h>
 #include <plat/s3c6400.h>
 #include <plat/s3c6410.h>
 
@@ -51,6 +52,9 @@ static struct map_desc s3c6410_iodesc[] __initdata = {
 void __init s3c6410_map_io(void)
 {
        iotable_init(s3c6410_iodesc, ARRAY_SIZE(s3c6410_iodesc));
+
+       /* initialise device information early */
+       s3c6410_default_sdhci0();
 }
 
 void __init s3c6410_init_clocks(int xtal)
diff --git a/arch/arm/mach-s3c6410/setup-sdhci.c b/arch/arm/mach-s3c6410/setup-sdhci.c
new file mode 100644 (file)
index 0000000..0b5788b
--- /dev/null
@@ -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));
+}
index 5a5ef74ebde3898b4369ae6dba41b3c8092d1a9e..4c05b39810e27f49bd26e36189e5fd07861a8ec2 100644 (file)
 
 #include <linux/kernel.h>
 #include <linux/platform_device.h>
+#include <linux/mmc/host.h>
 
 #include <mach/map.h>
+#include <plat/sdhci.h>
 #include <plat/devs.h>
 #include <plat/cpu.h>
 
@@ -35,13 +37,32 @@ static struct resource s3c_hsmmc_resource[] = {
 
 static u64 s3c_device_hsmmc_dmamask = 0xffffffffUL;
 
+struct s3c_sdhci_platdata s3c_hsmmc0_def_platdata = {
+       .max_width      = 4,
+       .host_caps      = (MMC_CAP_4_BIT_DATA |
+                          MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED),
+};
+
 struct platform_device s3c_device_hsmmc0 = {
-       .name             = "s3c-sdhci",
-       .id               = 0,
-       .num_resources    = ARRAY_SIZE(s3c_hsmmc_resource),
-       .resource         = s3c_hsmmc_resource,
-       .dev              = {
-               .dma_mask = &s3c_device_hsmmc_dmamask,
-               .coherent_dma_mask = 0xffffffffUL
-       }
+       .name           = "s3c-sdhci",
+       .id             = 0,
+       .num_resources  = ARRAY_SIZE(s3c_hsmmc_resource),
+       .resource       = s3c_hsmmc_resource,
+       .dev            = {
+               .dma_mask               = &s3c_device_hsmmc_dmamask,
+               .coherent_dma_mask      = 0xffffffffUL,
+               .platform_data          = &s3c_hsmmc0_def_platdata,
+       },
 };
+
+void s3c_sdhci0_set_platdata(struct s3c_sdhci_platdata *pd)
+{
+       struct s3c_sdhci_platdata *set = &s3c_hsmmc0_def_platdata;
+
+       set->max_width = pd->max_width;
+
+       if (pd->cfg_gpio)
+               set->cfg_gpio = pd->cfg_gpio;
+       if (pd->cfg_card)
+               set->cfg_card = pd->cfg_card;
+}
diff --git a/arch/arm/plat-s3c/include/plat/sdhci.h b/arch/arm/plat-s3c/include/plat/sdhci.h
new file mode 100644 (file)
index 0000000..c999912
--- /dev/null
@@ -0,0 +1,87 @@
+/* linux/arch/arm/plat-s3c/include/plat/sdhci.h
+ *
+ * Copyright 2008 Openmoko, Inc.
+ * Copyright 2008 Simtec Electronics
+ *     http://armlinux.simtec.co.uk/
+ *     Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C Platform - SDHCI (HSMMC) platform data definitions
+ *
+ * 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.
+*/
+
+#ifndef __PLAT_S3C_SDHCI_H
+#define __PLAT_S3C_SDHCI_H __FILE__
+
+struct platform_device;
+struct mmc_host;
+struct mmc_card;
+struct mmc_ios;
+
+/**
+ * struct s3c_sdhci_platdata() - Platform device data for Samsung SDHCI
+ * @max_width: The maximum number of data bits supported.
+ * @host_caps: Standard MMC host capabilities bit field.
+ * @cfg_gpio: Configure the GPIO for a specific card bit-width
+ * @cfg_card: Configure the interface for a specific card and speed. This
+ *            is necessary the controllers and/or GPIO blocks require the
+ *           changing of driver-strength and other controls dependant on
+ *           the card and speed of operation.
+ *
+ * Initialisation data specific to either the machine or the platform
+ * for the device driver to use or call-back when configuring gpio or
+ * card speed information.
+*/
+struct s3c_sdhci_platdata {
+       unsigned int    max_width;
+       unsigned int    host_caps;
+
+       char            **clocks;       /* set of clock sources */
+
+       void    (*cfg_gpio)(struct platform_device *dev, int width);
+       void    (*cfg_card)(struct platform_device *dev,
+                           void __iomem *regbase,
+                           struct mmc_ios *ios,
+                           struct mmc_card *card);
+};
+
+/**
+ * s3c_sdhci0_set_platdata - Set platform data for S3C SDHCI device.
+ * @pd: Platform data to register to device.
+ *
+ * Register the given platform data for use withe S3C SDHCI device.
+ * The call will copy the platform data, so the board definitions can
+ * make the structure itself __initdata.
+ */
+extern void s3c_sdhci0_set_platdata(struct s3c_sdhci_platdata *pd);
+
+/* Default platform data, exported so that per-cpu initialisation can
+ * set the correct one when there are more than one cpu type selected.
+*/
+
+extern struct s3c_sdhci_platdata s3c_hsmmc0_def_platata;
+
+/* Helper function availablity */
+
+#ifdef CONFIG_S3C6410_SETUP_SDHCI
+extern char *s3c6410_hsmmc_clksrcs[4];
+
+extern void s3c6410_setup_sdhci0_cfg_gpio(struct platform_device *, int w);
+extern void s3c6410_setup_sdhci0_cfg_card(struct platform_device *dev,
+                                          void __iomem *r,
+                                          struct mmc_ios *ios,
+                                          struct mmc_card *card);
+
+static inline void s3c6410_default_sdhci0(void)
+{
+       s3c_hsmmc0_def_platdata.clocks = s3c6410_hsmmc_clksrcs;
+       s3c_hsmmc0_def_platdata.cfg_gpio = s3c6410_setup_sdhci0_cfg_gpio;
+       s3c_hsmmc0_def_platdata.cfg_card = s3c6410_setup_sdhci0_cfg_card;
+}
+#else
+static inline void s3c6410_default_sdhci0(void) { }
+#endif /* CONFIG_S3C6410_SETUP_SDHCI */
+
+#endif /* __PLAT_S3C_SDHCI_H */