[PATCH 4/8] OMAP4:GPIO:Add support for early platform gpio device

Charulatha V
2010-03-31T12:19:29Z

This patch adds support for implementing OMAP4 GPIO as an
early platform device and adds gpio_init specific to OMAP4

This patch adds device structures for each GPIO device in
OMAP4 architecture. These strutures are not created in a
separate *_data.c file because these structures would be
removed once the driver gets adapted to HWMOD way.

Signed-off-by: Charulatha V <charu@ti.com>
---
arch/arm/mach-omap2/gpio44xx.c | 350 +++++++++++++++++++++++++++++++
arch/arm/mach-omap2/include/mach/gpio.h | 3 +-
2 files changed, 352 insertions(+), 1 deletions(-)
create mode 100644 arch/arm/mach-omap2/gpio44xx.c

diff --git a/arch/arm/mach-omap2/gpio44xx.c b/arch/arm/mach-omap2/gpio44xx.c
new file mode 100644
index 0000000..6133251
--- /dev/null
+++ b/arch/arm/mach-omap2/gpio44xx.c
@@ -0,0 +1,350 @@
+/*
+ * gpio44xx.c - OMAP4-specific gpio code
+ *
+ * Copyright (C) 2010 Texas Instruments, Inc.
+ *
+ * Author:
+ * Charulatha V <charu@ti.com>
+ *
+ * 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 <plat/gpio.h>
+
+/*
+ * OMAP4 GPIO reg offsets
+ */
+static struct gpio_reg_offset omap4_gpio_reg = {
+ .data_in = OMAP4_GPIO_DATAIN,
+ .data_out = OMAP4_GPIO_DATAOUT,
+ .data_out_set = OMAP4_GPIO_SETDATAOUT,
+ .data_out_clear = OMAP4_GPIO_CLEARDATAOUT,
+ .dir_ctrl = OMAP4_GPIO_OE,
+ .irq_status0 = OMAP4_GPIO_IRQSTATUS0,
+ .irq_status1 = OMAP4_GPIO_IRQSTATUS1,
+ .irq_mask = OMAP4_GPIO_IRQSTATUSSET0,
+ .irq_set = OMAP4_GPIO_IRQSTATUSSET0,
+ .irq_clear = OMAP4_GPIO_IRQSTATUSCLR0,
+ .irq_mask_bits = 0xffffffff,
+ .irq_inv = 0,
+ .wkup_enable = OMAP4_GPIO_IRQWAKEN0,
+ .wkup_clear = OMAP4_GPIO_IRQWAKEN0,
+ .wkup_set = OMAP4_GPIO_IRQWAKEN0,
+ .debounce_ena = OMAP4_GPIO_DEBOUNCENABLE,
+ .debounce_val = OMAP4_GPIO_DEBOUNCINGTIME,
+ .ctrl = OMAP4_GPIO_CTRL,
+ .syscfg = OMAP4_GPIO_SYSCONFIG,
+ .leveldetect0 = OMAP4_GPIO_LEVELDETECT0,
+ .leveldetect1 = OMAP4_GPIO_LEVELDETECT1,
+ .rise_detect = OMAP4_GPIO_RISINGDETECT,
+ .fall_detect = OMAP4_GPIO_FALLINGDETECT,
+ .rev_reg = OMAP4_GPIO_REVISION,
+};
+
+/*
+ * OMAP4 GPIO1 interface data
+ */
+static struct __initdata resource omap4_gpio1_resources[] = {
+ {
+ .start = OMAP44XX_GPIO1_BASE,
+ .end = OMAP44XX_GPIO1_BASE + OMAP4_GPIO_AS_LEN - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = OMAP44XX_IRQ_GPIO1,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct __initdata omap_gpio_platform_data omap4_gpio1_config = {
+ .ick_name = "gpio1_ick",
+ .dbck_name = "gpio1_dbck",
+ .virtual_irq_start = IH_GPIO_BASE,
+ .method = METHOD_GPIO_OMAP2PLUS,
+};
+
+static struct __initdata platform_device omap4_gpio1 = {
+ .name = "omap-gpio",
+ .id = 0,
+ .dev = {
+ .platform_data = &omap4_gpio1_config,
+ },
+ .num_resources = ARRAY_SIZE(omap4_gpio1_resources),
+ .resource = omap4_gpio1_resources,
+};
+
+/*
+ * OMAP4 GPIO2 interface data
+ */
+static struct __initdata resource omap4_gpio2_resources[] = {
+ {
+ .start = OMAP44XX_GPIO2_BASE,
+ .end = OMAP44XX_GPIO2_BASE + OMAP4_GPIO_AS_LEN - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = OMAP44XX_IRQ_GPIO2,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct __initdata omap_gpio_platform_data omap4_gpio2_config = {
+ .ick_name = "gpio2_ick",
+ .dbck_name = "gpio2_dbck",
+ .virtual_irq_start = IH_GPIO_BASE + 32,
+ .method = METHOD_GPIO_OMAP2PLUS,
+};
+
+static struct __initdata platform_device omap4_gpio2 = {
+ .name = "omap-gpio",
+ .id = 1,
+ .dev = {
+ .platform_data = &omap4_gpio2_config,
+ },
+ .num_resources = ARRAY_SIZE(omap4_gpio2_resources),
+ .resource = omap4_gpio2_resources,
+};
+
+/*
+ * OMAP4 GPIO3 interface data
+ */
+static struct __initdata resource omap4_gpio3_resources[] = {
+ {
+ .start = OMAP44XX_GPIO3_BASE,
+ .end = OMAP44XX_GPIO3_BASE + OMAP4_GPIO_AS_LEN - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = OMAP44XX_IRQ_GPIO3,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct __initdata omap_gpio_platform_data omap4_gpio3_config = {
+ .ick_name = "gpio3_ick",
+ .dbck_name = "gpio3_dbck",
+ .virtual_irq_start = IH_GPIO_BASE + 64,
+ .method = METHOD_GPIO_OMAP2PLUS,
+};
+
+static struct __initdata platform_device omap4_gpio3 = {
+ .name = "omap-gpio",
+ .id = 2,
+ .dev = {
+ .platform_data = &omap4_gpio3_config,
+ },
+ .num_resources = ARRAY_SIZE(omap4_gpio3_resources),
+ .resource = omap4_gpio3_resources,
+};
+
+/*
+ * OMAP4 GPIO4 interface data
+ */
+static struct __initdata resource omap4_gpio4_resources[] = {
+ {
+ .start = OMAP44XX_GPIO4_BASE,
+ .end = OMAP44XX_GPIO4_BASE + OMAP4_GPIO_AS_LEN - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = OMAP44XX_IRQ_GPIO4,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct __initdata omap_gpio_platform_data omap4_gpio4_config = {
+ .ick_name = "gpio4_ick",
+ .dbck_name = "gpio4_dbck",
+ .virtual_irq_start = IH_GPIO_BASE + 96,
+ .method = METHOD_GPIO_OMAP2PLUS,
+};
+
+static struct __initdata platform_device omap4_gpio4 = {
+ .name = "omap-gpio",
+ .id = 3,
+ .dev = {
+ .platform_data = &omap4_gpio4_config,
+ },
+ .num_resources = ARRAY_SIZE(omap4_gpio4_resources),
+ .resource = omap4_gpio4_resources,
+};
+
+/*
+ * OMAP4 GPIO5 interface data
+ */
+static struct __initdata resource omap4_gpio5_resources[] = {
+ {
+ .start = OMAP44XX_GPIO5_BASE,
+ .end = OMAP44XX_GPIO5_BASE + OMAP4_GPIO_AS_LEN - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = OMAP44XX_IRQ_GPIO5,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct __initdata omap_gpio_platform_data omap4_gpio5_config = {
+ .ick_name = "gpio5_ick",
+ .dbck_name = "gpio5_dbck",
+ .virtual_irq_start = IH_GPIO_BASE + 128,
+ .method = METHOD_GPIO_OMAP2PLUS,
+};
+
+static struct __initdata platform_device omap4_gpio5 = {
+ .name = "omap-gpio",
+ .id = 4,
+ .dev = {
+ .platform_data = &omap4_gpio5_config,
+ },
+ .num_resources = ARRAY_SIZE(omap4_gpio5_resources),
+ .resource = omap4_gpio5_resources,
+};
+
+/*
+ * OMAP4 GPIO6 interface data
+ */
+static struct __initdata resource omap4_gpio6_resources[] = {
+ {
+ .start = OMAP44XX_GPIO6_BASE,
+ .end = OMAP44XX_GPIO6_BASE + OMAP4_GPIO_AS_LEN - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = OMAP44XX_IRQ_GPIO6,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct __initdata omap_gpio_platform_data omap4_gpio6_config = {
+ .ick_name = "gpio6_ick",
+ .dbck_name = "gpio6_dbck",
+ .virtual_irq_start = IH_GPIO_BASE + 160,
+ .method = METHOD_GPIO_OMAP2PLUS,
+};
+
+static struct __initdata platform_device omap4_gpio6 = {
+ .name = "omap-gpio",
+ .id = 5,
+ .dev = {
+ .platform_data = &omap4_gpio6_config,
+ },
+ .num_resources = ARRAY_SIZE(omap4_gpio6_resources),
+ .resource = omap4_gpio6_resources,
+};
+
+static struct __initdata platform_device * omap4_gpio_early_dev[] = {
+ &omap4_gpio1,
+ &omap4_gpio2,
+ &omap4_gpio3,
+ &omap4_gpio4,
+ &omap4_gpio5,
+ &omap4_gpio6
+};
+
+static struct gpio_bank *omap4_get_gpio_bank(int gpio,
+ struct gpio_bank *gpio_bank)
+{
+ if (cpu_is_omap44xx())
+ return &gpio_bank[gpio >> 5];
+ BUG();
+ return NULL;
+}
+
+static int set_omap4_gpio_triggering(struct gpio_bank *bank, int gpio,
+ int trigger)
+{
+ void __iomem *base = bank->base;
+ u32 gpio_bit = 1 << gpio;
+ u32 val;
+
+ if (!cpu_is_omap44xx())
+ return -EINVAL;
+
+ MOD_REG_BIT(OMAP4_GPIO_LEVELDETECT0, gpio_bit,
+ trigger & IRQ_TYPE_LEVEL_LOW);
+ MOD_REG_BIT(OMAP4_GPIO_LEVELDETECT1, gpio_bit,
+ trigger & IRQ_TYPE_LEVEL_HIGH);
+ MOD_REG_BIT(OMAP4_GPIO_RISINGDETECT, gpio_bit,
+ trigger & IRQ_TYPE_EDGE_RISING);
+ MOD_REG_BIT(OMAP4_GPIO_FALLINGDETECT, gpio_bit,
+ trigger & IRQ_TYPE_EDGE_FALLING);
+ if (likely(!(bank->non_wakeup_gpios & gpio_bit))) {
+ if (trigger != 0)
+ __raw_writel(1 << gpio, bank->base +
+ OMAP4_GPIO_IRQWAKEN0);
+ else {
+ val = __raw_readl(bank->base + OMAP4_GPIO_IRQWAKEN0);
+ __raw_writel(val & (~(1 << gpio)), bank->base +
+ OMAP4_GPIO_IRQWAKEN0);
+ }
+ } else {
+ if (trigger != 0)
+ bank->enabled_non_wakeup_gpios |= gpio_bit;
+ else
+ bank->enabled_non_wakeup_gpios &= ~gpio_bit;
+ }
+
+ bank->level_mask = __raw_readl(bank->base + OMAP4_GPIO_LEVELDETECT0) |
+ __raw_readl(bank->base +
+ OMAP4_GPIO_LEVELDETECT1);
+
+ return 0;
+}
+
+void __init omap4_gpio_mod_init(struct gpio_bank *bank, int i)
+{
+ static const u32 non_wakeup_gpios[] = {
+ 0xe203ffc0, 0x08700040
+ };
+
+ __raw_writel(0xffffffff, bank->base + OMAP4_GPIO_IRQSTATUSCLR0);
+ __raw_writew(0x0015, bank->base + OMAP4_GPIO_SYSCONFIG);
+ __raw_writel(0x00000000, bank->base + OMAP4_GPIO_DEBOUNCENABLE);
+ /* Initialize interface clock ungated, module enabled */
+ __raw_writel(0, bank->base + OMAP4_GPIO_CTRL);
+
+ if (i < ARRAY_SIZE(non_wakeup_gpios))
+ bank->non_wakeup_gpios = non_wakeup_gpios[i];
+}
+
+/*
+ * OMAP4 GPIO function pointers, reg offset pointer and other info
+ */
+static struct omap_gpio_info omap4_gpio_data = {
+ .reg_off = &omap4_gpio_reg,
+ .index_mask = 0x1f,
+ .no_of_gpio = 192,
+ .bank_count = OMAP4_NR_GPIOS,
+ .bank_bits = 32,
+ .get_gpio_bank = omap4_get_gpio_bank,
+ .gpio_mod_init = omap4_gpio_mod_init,
+ .set_gpio_triggering = set_omap4_gpio_triggering,
+};
+
+void __init omap4_gpio_init_data(void)
+{
+ gpio_init(&omap4_gpio_data);
+}
+
+int __init omap4_early_init_gpio(struct platform_device ***pdev)
+{
+ *pdev = omap4_gpio_early_dev;
+ return OMAP4_NR_GPIOS;
+}
+
+int __init omap4_gpio_dev_reg(void)
+{
+ if (cpu_is_omap44xx()) {
+ platform_device_register(&omap4_gpio1);
+ platform_device_register(&omap4_gpio2);
+ platform_device_register(&omap4_gpio3);
+ platform_device_register(&omap4_gpio4);
+ platform_device_register(&omap4_gpio5);
+ platform_device_register(&omap4_gpio6);
+ }
+ return 0;
+}
+arch_initcall(omap4_gpio_dev_reg);
diff --git a/arch/arm/mach-omap2/include/mach/gpio.h b/arch/arm/mach-omap2/include/mach/gpio.h
index e822a41..d2d9d17 100644
--- a/arch/arm/mach-omap2/include/mach/gpio.h
+++ b/arch/arm/mach-omap2/include/mach/gpio.h
@@ -89,7 +89,6 @@
#define OMAP4_GPIO_IRQWAKEN0 0x0044
#define OMAP4_GPIO_IRQWAKEN1 0x0048
#define OMAP4_GPIO_SYSSTATUS 0x0114
-#define OMAP4_GPIO_SYSSTATUS 0x0114
#define OMAP4_GPIO_IRQENABLE1 0x011c
#define OMAP4_GPIO_WAKE_EN 0x0120
#define OMAP4_GPIO_IRQSTATUS2 0x0128
@@ -112,6 +111,8 @@

extern void omap2_gpio_init_data(void);
extern void omap3_gpio_init_data(void);
+extern void omap4_gpio_init_data(void);
extern int omap2_early_init_gpio(struct platform_device ***pdev);
extern int omap3_early_init_gpio(struct platform_device ***pdev);
+extern int omap4_early_init_gpio(struct platform_device ***pdev);
#endif
--
1.6.3.3