[patch] GPIO support for HTC Dream

[pavel@ucw.cz (Pavel Machek)]

Add GPIO support for HTC Dream.

Signed-off-by: Pavel Machek <pavel@ucw.cz>
Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com>

---

This should be very correct, including some nitpicking.

diff --git a/arch/arm/mach-msm/Kconfig b/arch/arm/mach-msm/Kconfig
index f780086..fab64f1 100644
--- a/arch/arm/mach-msm/Kconfig
+++ b/arch/arm/mach-msm/Kconfig
@@ -36,6 +36,8 @@ config MACH_HALIBUT
 
 config MACH_TROUT
 	default y
+	select GENERIC_GPIO
+	select ARCH_REQUIRE_GPIOLIB
 	bool "HTC Dream (aka trout)"
 	help
 	  Support for the HTC Dream, T-Mobile G1, Android ADP1 devices.
diff --git a/arch/arm/mach-msm/Makefile b/arch/arm/mach-msm/Makefile
index 91e6f5c..595881d 100644
--- a/arch/arm/mach-msm/Makefile
+++ b/arch/arm/mach-msm/Makefile
@@ -6,4 +6,4 @@ obj-y += clock.o clock-7x01a.o
 
 obj-$(CONFIG_MACH_HALIBUT) += board-halibut.o
 
-obj-$(CONFIG_MACH_TROUT) += board-dream.o
+obj-$(CONFIG_MACH_TROUT) += board-dream.o board-dream-gpio.o
diff --git a/arch/arm/mach-msm/board-dream-gpio.c b/arch/arm/mach-msm/board-dream-gpio.c
new file mode 100644
index 0000000..f5ea3af
--- /dev/null
+++ b/arch/arm/mach-msm/board-dream-gpio.c
@@ -0,0 +1,116 @@
+/*
+ * linux/arch/arm/mach-msm/gpio.c
+ *
+ * Copyright (C) 2005 HP Labs
+ * Copyright (C) 2008 Google, Inc.
+ * Copyright (C) 2009 Pavel Machek <pavel@ucw.cz>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/gpio.h>
+
+#include "board-dream.h"
+
+struct msm_gpio_chip {
+	struct gpio_chip	chip;
+	void __iomem		*reg;	/* Base of register bank */
+	u8			shadow;
+};
+
+#define to_msm_gpio_chip(c) container_of(c, struct msm_gpio_chip, chip)
+
+static int msm_gpiolib_get(struct gpio_chip *chip, unsigned offset)
+{
+	struct msm_gpio_chip *msm_gpio = to_msm_gpio_chip(chip);
+	unsigned mask = 1 << offset;
+
+	return !! (readb(msm_gpio->reg) & mask);
+}
+
+static void msm_gpiolib_set(struct gpio_chip *chip, unsigned offset, int val)
+{
+	struct msm_gpio_chip *msm_gpio = to_msm_gpio_chip(chip);
+	unsigned mask = 1 << offset;
+
+	if (val)
+		msm_gpio->shadow |= mask;
+	else
+		msm_gpio->shadow &= ~mask;
+
+	writeb(msm_gpio->shadow, msm_gpio->reg);
+}
+
+static int msm_gpiolib_direction_input(struct gpio_chip *chip,
+					unsigned offset)
+{
+	msm_gpiolib_set(chip, offset, 0);
+	return 0;
+}
+
+static int msm_gpiolib_direction_output(struct gpio_chip *chip,
+					 unsigned offset, int val)
+{
+	msm_gpiolib_set(chip, offset, val);
+	return 0;
+}
+
+int gpio_to_irq(unsigned gpio)
+{
+	return -EINVAL;
+}
+
+#define DREAM_GPIO_BANK(name, reg_num, base_gpio, shadow_val)		\
+	{								\
+		.chip = {						\
+			.label		  = name,			\
+			.direction_input  = msm_gpiolib_direction_input,\
+			.direction_output = msm_gpiolib_direction_output, \
+			.get		  = msm_gpiolib_get,		\
+			.set		  = msm_gpiolib_set,		\
+			.base		  = base_gpio,			\
+			.ngpio		  = 8,				\
+		},							\
+		.reg = (void *) reg_num + DREAM_CPLD_BASE,		\
+		.shadow = shadow_val,					\
+	}
+
+static struct msm_gpio_chip msm_gpio_banks[] = {
+#if defined(CONFIG_MSM_DEBUG_UART1)
+        /* H2W pins <-> UART1 */
+        DREAM_GPIO_BANK("MISC2", 0x00,   DREAM_GPIO_MISC2_BASE, 0x40),
+#else
+	/* H2W pins <-> UART3, Bluetooth <-> UART1 */
+        DREAM_GPIO_BANK("MISC2", 0x00,   DREAM_GPIO_MISC2_BASE, 0x80),
+#endif
+	/* I2C pull */
+        DREAM_GPIO_BANK("MISC3", 0x02,   DREAM_GPIO_MISC3_BASE, 0x04),
+        DREAM_GPIO_BANK("MISC4", 0x04,   DREAM_GPIO_MISC4_BASE, 0),
+	/* mmdi 32k en */
+        DREAM_GPIO_BANK("MISC5", 0x06,   DREAM_GPIO_MISC5_BASE, 0x04),
+        DREAM_GPIO_BANK("INT2", 0x08,    DREAM_GPIO_INT2_BASE,  0),
+        DREAM_GPIO_BANK("MISC1", 0x0a,   DREAM_GPIO_MISC1_BASE, 0),
+        DREAM_GPIO_BANK("VIRTUAL", 0x12, DREAM_GPIO_VIRTUAL_BASE, 0),
+};
+
+/*
+ * Called from the processor-specific init to enable GPIO pin support.
+ */
+int __init dream_init_gpio(void)
+{
+        int i;
+
+        for (i = 0; i < ARRAY_SIZE(msm_gpio_banks); i++)
+                gpiochip_add(&msm_gpio_banks[i].chip);
+
+	return 0;
+}
+
+postcore_initcall(dream_init_gpio);
+
diff --git a/arch/arm/mach-msm/include/mach/gpio.h b/arch/arm/mach-msm/include/mach/gpio.h
new file mode 100644
index 0000000..6c07b85
--- /dev/null
+++ b/arch/arm/mach-msm/include/mach/gpio.h
@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 2007 Google, Inc.
+ * Author: Mike Lockwood <lockwood@android.com>
+ * Copyright (C) 2009 Pavel Machek <pavel@ucw.cz>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#ifndef __ASM_ARCH_MSM_GPIO_H
+#define __ASM_ARCH_MSM_GPIO_H
+
+#include <asm-generic/gpio.h>
+
+#define gpio_get_value __gpio_get_value
+#define gpio_set_value __gpio_set_value
+#define gpio_cansleep __gpio_cansleep
+
+extern int gpio_to_irq(unsigned gpio);
+
+
+#define DREAM_GPIO_CABLE_IN1		    (83)
+#define DREAM_GPIO_CABLE_IN2		    (49)
+
+#define DREAM_GPIO_START		    (128)
+
+#define DREAM_GPIO_INT_MASK0_REG            (0x0c)
+#define DREAM_GPIO_INT_STAT0_REG            (0x0e)
+#define DREAM_GPIO_INT_MASK1_REG            (0x14)
+#define DREAM_GPIO_INT_STAT1_REG            (0x10)
+
+#define DREAM_GPIO_HAPTIC_PWM               (28)
+#define DREAM_GPIO_PS_HOLD                  (25)
+
+#define DREAM_GPIO_MISC2_BASE               (DREAM_GPIO_START + 0x00)
+#define DREAM_GPIO_MISC3_BASE               (DREAM_GPIO_START + 0x08)
+#define DREAM_GPIO_MISC4_BASE               (DREAM_GPIO_START + 0x10)
+#define DREAM_GPIO_MISC5_BASE               (DREAM_GPIO_START + 0x18)
+#define DREAM_GPIO_INT2_BASE                (DREAM_GPIO_START + 0x20)
+#define DREAM_GPIO_MISC1_BASE               (DREAM_GPIO_START + 0x28)
+#define DREAM_GPIO_VIRTUAL_BASE             (DREAM_GPIO_START + 0x30)
+#define DREAM_GPIO_INT5_BASE                (DREAM_GPIO_START + 0x48)
+
+#define DREAM_GPIO_CHARGER_EN               (DREAM_GPIO_MISC2_BASE + 0)
+#define DREAM_GPIO_ISET                     (DREAM_GPIO_MISC2_BASE + 1)
+#define DREAM_GPIO_H2W_DAT_DIR              (DREAM_GPIO_MISC2_BASE + 2)
+#define DREAM_GPIO_H2W_CLK_DIR              (DREAM_GPIO_MISC2_BASE + 3)
+#define DREAM_GPIO_H2W_DAT_GPO              (DREAM_GPIO_MISC2_BASE + 4)
+#define DREAM_GPIO_H2W_CLK_GPO              (DREAM_GPIO_MISC2_BASE + 5)
+#define DREAM_GPIO_H2W_SEL0                 (DREAM_GPIO_MISC2_BASE + 6)
+#define DREAM_GPIO_H2W_SEL1                 (DREAM_GPIO_MISC2_BASE + 7)
+
+#define DREAM_GPIO_SPOTLIGHT_EN             (DREAM_GPIO_MISC3_BASE + 0)
+#define DREAM_GPIO_FLASH_EN                 (DREAM_GPIO_MISC3_BASE + 1)
+#define DREAM_GPIO_I2C_PULL                 (DREAM_GPIO_MISC3_BASE + 2)
+#define DREAM_GPIO_TP_I2C_PULL              (DREAM_GPIO_MISC3_BASE + 3)
+#define DREAM_GPIO_TP_EN                    (DREAM_GPIO_MISC3_BASE + 4)
+#define DREAM_GPIO_JOG_EN                   (DREAM_GPIO_MISC3_BASE + 5)
+#define DREAM_GPIO_UI_LED_EN                (DREAM_GPIO_MISC3_BASE + 6)
+#define DREAM_GPIO_QTKEY_LED_EN             (DREAM_GPIO_MISC3_BASE + 7)
+
+#define DREAM_GPIO_VCM_PWDN                 (DREAM_GPIO_MISC4_BASE + 0)
+#define DREAM_GPIO_USB_H2W_SW               (DREAM_GPIO_MISC4_BASE + 1)
+#define DREAM_GPIO_COMPASS_RST_N            (DREAM_GPIO_MISC4_BASE + 2)
+#define DREAM_GPIO_HAPTIC_EN_UP             (DREAM_GPIO_MISC4_BASE + 3)
+#define DREAM_GPIO_HAPTIC_EN_MAIN           (DREAM_GPIO_MISC4_BASE + 4)
+#define DREAM_GPIO_USB_PHY_RST_N            (DREAM_GPIO_MISC4_BASE + 5)
+#define DREAM_GPIO_WIFI_PA_RESETX           (DREAM_GPIO_MISC4_BASE + 6)
+#define DREAM_GPIO_WIFI_EN                  (DREAM_GPIO_MISC4_BASE + 7)
+
+#define DREAM_GPIO_BT_32K_EN                (DREAM_GPIO_MISC5_BASE + 0)
+#define DREAM_GPIO_MAC_32K_EN               (DREAM_GPIO_MISC5_BASE + 1)
+#define DREAM_GPIO_MDDI_32K_EN              (DREAM_GPIO_MISC5_BASE + 2)
+#define DREAM_GPIO_COMPASS_32K_EN           (DREAM_GPIO_MISC5_BASE + 3)
+
+#define DREAM_GPIO_NAVI_ACT_N               (DREAM_GPIO_INT2_BASE + 0)
+#define DREAM_GPIO_COMPASS_IRQ              (DREAM_GPIO_INT2_BASE + 1)
+#define DREAM_GPIO_SLIDING_DET              (DREAM_GPIO_INT2_BASE + 2)
+#define DREAM_GPIO_AUD_HSMIC_DET_N          (DREAM_GPIO_INT2_BASE + 3)
+#define DREAM_GPIO_SD_DOOR_N                (DREAM_GPIO_INT2_BASE + 4)
+#define DREAM_GPIO_CAM_BTN_STEP1_N          (DREAM_GPIO_INT2_BASE + 5)
+#define DREAM_GPIO_CAM_BTN_STEP2_N          (DREAM_GPIO_INT2_BASE + 6)
+#define DREAM_GPIO_TP_ATT_N                 (DREAM_GPIO_INT2_BASE + 7)
+#define DREAM_GPIO_BANK0_FIRST_INT_SOURCE   (DREAM_GPIO_NAVI_ACT_N)
+#define DREAM_GPIO_BANK0_LAST_INT_SOURCE    (DREAM_GPIO_TP_ATT_N)
+
+#define DREAM_GPIO_H2W_DAT_GPI              (DREAM_GPIO_MISC1_BASE + 0)
+#define DREAM_GPIO_H2W_CLK_GPI              (DREAM_GPIO_MISC1_BASE + 1)
+#define DREAM_GPIO_CPLD128_VER_0            (DREAM_GPIO_MISC1_BASE + 4)
+#define DREAM_GPIO_CPLD128_VER_1            (DREAM_GPIO_MISC1_BASE + 5)
+#define DREAM_GPIO_CPLD128_VER_2            (DREAM_GPIO_MISC1_BASE + 6)
+#define DREAM_GPIO_CPLD128_VER_3            (DREAM_GPIO_MISC1_BASE + 7)
+
+#define DREAM_GPIO_SDMC_CD_N                (DREAM_GPIO_VIRTUAL_BASE + 0)
+#define DREAM_GPIO_END                      (DREAM_GPIO_SDMC_CD_N)
+#define DREAM_GPIO_BANK1_FIRST_INT_SOURCE   (DREAM_GPIO_SDMC_CD_N)
+#define DREAM_GPIO_BANK1_LAST_INT_SOURCE    (DREAM_GPIO_SDMC_CD_N)
+
+#endif

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html