From: Sangbeom Kim <sbkim73@samsung.com>
To: linux-samsung-soc@vger.kernel.org
Cc: kgene.kim@samsung.com, ben-linux@fluff.org,
Abhilash Kesavan <a.kesavan@samsung.com>,
Sangbeom Kim <sbkim73@samsung.com>
Subject: [PATCH 2/4] ARM: S5P64X0: Add support for SDHCI configuration
Date: Mon, 13 Dec 2010 14:46:23 +0900 [thread overview]
Message-ID: <1292219185-3911-3-git-send-email-sbkim73@samsung.com> (raw)
In-Reply-To: <1292219185-3911-1-git-send-email-sbkim73@samsung.com>
From: Abhilash Kesavan <a.kesavan@samsung.com>
Adds support for HSMMC for S5P6440 and S5P6450, performs
setup for host controller and related GPIO.
Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: Sangbeom Kim <sbkim73@samsung.com>
---
arch/arm/mach-s5p64x0/Kconfig | 19 ++++++++
arch/arm/mach-s5p64x0/Makefile | 2 +
arch/arm/mach-s5p64x0/setup-sdhci-gpio.c | 67 ++++++++++++++++++++++++++++++
arch/arm/mach-s5p64x0/setup-sdhci.c | 58 ++++++++++++++++++++++++++
4 files changed, 146 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-s5p64x0/setup-sdhci-gpio.c
create mode 100644 arch/arm/mach-s5p64x0/setup-sdhci.c
diff --git a/arch/arm/mach-s5p64x0/Kconfig b/arch/arm/mach-s5p64x0/Kconfig
index 164d278..3946728 100644
--- a/arch/arm/mach-s5p64x0/Kconfig
+++ b/arch/arm/mach-s5p64x0/Kconfig
@@ -24,6 +24,17 @@ config S5P64X0_SETUP_I2C1
help
Common setup code for i2c bus 1.
+config S5P64X0_SETUP_SDHCI
+ bool
+ select S5P64X0_SETUP_SDHCI_GPIO
+ help
+ Internal helper functions for S5P64X0 based SDHCI systems
+
+config S5P64X0_SETUP_SDHCI_GPIO
+ bool
+ help
+ Common setup code for SDHCI gpio.
+
# machine support
config MACH_SMDK6440
@@ -35,7 +46,11 @@ config MACH_SMDK6440
select S3C64XX_DEV_SPI
select SAMSUNG_DEV_ADC
select SAMSUNG_DEV_TS
+ select S3C_DEV_HSMMC
+ select S3C_DEV_HSMMC1
+ select S3C_DEV_HSMMC2
select S5P64X0_SETUP_I2C1
+ select S5P64X0_SETUP_SDHCI
help
Machine support for the Samsung SMDK6440
@@ -48,7 +63,11 @@ config MACH_SMDK6450
select S3C64XX_DEV_SPI
select SAMSUNG_DEV_ADC
select SAMSUNG_DEV_TS
+ select S3C_DEV_HSMMC
+ select S3C_DEV_HSMMC1
+ select S3C_DEV_HSMMC2
select S5P64X0_SETUP_I2C1
+ select S5P64X0_SETUP_SDHCI
help
Machine support for the Samsung SMDK6450
diff --git a/arch/arm/mach-s5p64x0/Makefile b/arch/arm/mach-s5p64x0/Makefile
index 669f470..cbc9d1c 100644
--- a/arch/arm/mach-s5p64x0/Makefile
+++ b/arch/arm/mach-s5p64x0/Makefile
@@ -29,3 +29,5 @@ obj-y += dev-audio.o
obj-$(CONFIG_S3C64XX_DEV_SPI) += dev-spi.o
obj-$(CONFIG_S5P64X0_SETUP_I2C1) += setup-i2c1.o
+obj-$(CONFIG_S5P64X0_SETUP_SDHCI) += setup-sdhci.o
+obj-$(CONFIG_S5P64X0_SETUP_SDHCI_GPIO) += setup-sdhci-gpio.o
diff --git a/arch/arm/mach-s5p64x0/setup-sdhci-gpio.c b/arch/arm/mach-s5p64x0/setup-sdhci-gpio.c
new file mode 100644
index 0000000..3266c68
--- /dev/null
+++ b/arch/arm/mach-s5p64x0/setup-sdhci-gpio.c
@@ -0,0 +1,67 @@
+/* linux/arch/arm/plat-s5p64x0/setup-sdhci-gpio.c
+ *
+ * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * S5P64X0 - Helper functions for setting up SDHCI device(s) GPIO (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/platform_device.h>
+#include <linux/io.h>
+
+#include <mach/gpio.h>
+#include <mach/regs-gpio.h>
+
+#include <plat/gpio-cfg.h>
+#include <plat/sdhci.h>
+
+void s5p64x0_setup_sdhci0_cfg_gpio(struct platform_device *dev, int width)
+{
+ struct s3c_sdhci_platdata *pdata = dev->dev.platform_data;
+
+ /* Set all the necessary GPG pins to special-function 2 */
+ s3c_gpio_cfgrange_nopull(S5P6450_GPG(0), 2 + width, S3C_GPIO_SFN(2));
+
+ /* Set GPG[6] pin to special-funtion 2 - MMC0 CDn */
+ if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) {
+ s3c_gpio_setpull(S5P6450_GPG(6), S3C_GPIO_PULL_UP);
+ s3c_gpio_cfgpin(S5P6450_GPG(6), S3C_GPIO_SFN(2));
+ }
+}
+
+void s5p64x0_setup_sdhci1_cfg_gpio(struct platform_device *dev, int width)
+{
+ struct s3c_sdhci_platdata *pdata = dev->dev.platform_data;
+
+ /* Set all the necessary GPH pins to special-function 2 */
+ s3c_gpio_cfgrange_nopull(S5P6450_GPH(0), 2 + width, S3C_GPIO_SFN(2));
+
+ /* Set GPG[6] pin to special-funtion 3 - MMC1 CDn */
+ if (pdata->cd_type == S3C_SDHCI_CD_INTERNAL) {
+ s3c_gpio_setpull(S5P6450_GPG(6), S3C_GPIO_PULL_UP);
+ s3c_gpio_cfgpin(S5P6450_GPG(6), S3C_GPIO_SFN(3));
+ }
+}
+
+void s5p6440_setup_sdhci2_cfg_gpio(struct platform_device *dev, int width)
+{
+ /* Set GPC[4:5] pins to special-function 3 - CLK and CMD */
+ s3c_gpio_cfgrange_nopull(S5P6440_GPC(4), 2, S3C_GPIO_SFN(3));
+
+ /* Set GPH[6:9] pins to special-function 3 - Data[0:3] */
+ s3c_gpio_cfgrange_nopull(S5P6440_GPH(6), 4, S3C_GPIO_SFN(3));
+
+ /* No MMC2 CDn available */
+}
+
+void s5p6450_setup_sdhci2_cfg_gpio(struct platform_device *dev, int width)
+{
+ /* Set all the necessary GPG pins to special-function 2 */
+ s3c_gpio_cfgrange_nopull(S5P6450_GPG(7), 2 + width, S3C_GPIO_SFN(3));
+
+ /* No MMC2 CDn available */
+}
diff --git a/arch/arm/mach-s5p64x0/setup-sdhci.c b/arch/arm/mach-s5p64x0/setup-sdhci.c
new file mode 100644
index 0000000..7ea4c0d
--- /dev/null
+++ b/arch/arm/mach-s5p64x0/setup-sdhci.c
@@ -0,0 +1,58 @@
+/* linux/arch/arm/mach-s5p64x0/setup-sdhci.c
+ *
+ * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * S5P64X0 - Helper functions for setting 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/platform_device.h>
+#include <linux/io.h>
+#include <linux/mmc/host.h>
+
+#include <plat/regs-sdhci.h>
+
+/* clock sources for the mmc bus clock, order as for the ctrl2[5..4] */
+
+char *s5p64x0_hsmmc_clksrcs[4] = {
+ /* [0] = NULL, - reserved */
+ /* [1] = NULL, - reserved */
+ [2] = "sclk_mmc", /* mmc_bus */
+ /* [3] = NULL, - reserved */
+};
+
+void s5p64x0_setup_sdhci_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;
+
+ /*
+ * clear async mode, enable conflict mask, rx feedback ctrl, SD clock
+ * hold and no use debounce count
+ */
+ ctrl2 |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR |
+ S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK |
+ S3C_SDHCI_CTRL2_DFCNT_NONE |
+ S3C_SDHCI_CTRL2_ENCLKOUTHOLD);
+
+ if (ios)
+ if (ios->clock > 400000)
+ ctrl2 |= S3C_SDHCI_CTRL2_ENFBCLKRX;
+ ctrl3 = 0;
+
+ writel(ctrl2, r + S3C_SDHCI_CONTROL2);
+ writel(ctrl3, r + S3C_SDHCI_CONTROL3);
+}
--
1.6.6.1
next prev parent reply other threads:[~2010-12-13 6:05 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-13 5:46 [PATCH 0/4] ARM: S5P64X0: Add SDMMC support for S5P64x0 Sangbeom Kim
2010-12-13 5:46 ` [PATCH 1/4] ARM: S5P64X0: Changed the name for mmc special clock on s5p6440 Sangbeom Kim
2010-12-20 5:52 ` Kukjin Kim
2010-12-13 5:46 ` Sangbeom Kim [this message]
2010-12-20 6:03 ` [PATCH 2/4] ARM: S5P64X0: Add support for SDHCI configuration Kukjin Kim
2010-12-13 5:46 ` [PATCH 3/4] ARM: S5P64X0: Add SDHCI platform data for S5P6440/50 Sangbeom Kim
2010-12-13 5:46 ` [PATCH 4/4] ARM: S5P64X0: Add SDHCI support for SMDK6440 and SMDK6450 Sangbeom Kim
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