[PATCH 2/8] OMAP3:GPIO:Add support for early platform gpio device

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

This patch adds support for implementing OMAP3 GPIO as an
early platform device and adds gpio_init specific to OMAP3

This patch adds device structures for each GPIO device in
OMAP3 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/gpio3xxx.c | 351 +++++++++++++++++++++++++++++++
arch/arm/mach-omap2/include/mach/gpio.h | 13 +-
2 files changed, 363 insertions(+), 1 deletions(-)
create mode 100644 arch/arm/mach-omap2/gpio3xxx.c

diff --git a/arch/arm/mach-omap2/gpio3xxx.c b/arch/arm/mach-omap2/gpio3xxx.c
new file mode 100644
index 0000000..8f404e7
--- /dev/null
+++ b/arch/arm/mach-omap2/gpio3xxx.c
@@ -0,0 +1,351 @@
+/*
+ * gpio3xxx.c - OMAP3-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>
+
+/*
+ * OMAP3 GPIO reg offsets
+ */
+static struct gpio_reg_offset omap3_gpio_reg = {
+ .data_in = OMAP24XX_GPIO_DATAIN,
+ .data_out = OMAP24XX_GPIO_DATAOUT,
+ .data_out_set = OMAP24XX_GPIO_SETDATAOUT,
+ .data_out_clear = OMAP24XX_GPIO_CLEARDATAOUT,
+ .dir_ctrl = OMAP24XX_GPIO_OE,
+ .irq_status0 = OMAP24XX_GPIO_IRQSTATUS1,
+ .irq_status1 = OMAP24XX_GPIO_IRQSTATUS2,
+ .irq_mask = OMAP24XX_GPIO_IRQENABLE1,
+ .irq_set = OMAP24XX_GPIO_SETIRQENABLE1,
+ .irq_clear = OMAP24XX_GPIO_CLEARIRQENABLE1,
+ .irq_mask_bits = 0xffffffff,
+ .irq_inv = 0,
+ .wkup_enable = OMAP24XX_GPIO_WAKE_EN,
+ .wkup_clear = OMAP24XX_GPIO_CLEARWKUENA,
+ .wkup_set = OMAP24XX_GPIO_SETWKUENA,
+ .debounce_ena = OMAP24XX_GPIO_DEBOUNCE_EN,
+ .debounce_val = OMAP24XX_GPIO_DEBOUNCE_VAL,
+ .ctrl = OMAP24XX_GPIO_CTRL,
+ .syscfg = OMAP24XX_GPIO_SYSCONFIG,
+ .leveldetect0 = OMAP24XX_GPIO_LEVELDETECT0,
+ .leveldetect1 = OMAP24XX_GPIO_LEVELDETECT1,
+ .rise_detect = OMAP24XX_GPIO_RISINGDETECT,
+ .fall_detect = OMAP24XX_GPIO_FALLINGDETECT,
+ .rev_reg = OMAP24XX_GPIO_REVISION,
+};
+
+/*
+ * OMAP3 GPIO1 interface data
+ */
+static struct __initdata resource omap3_gpio1_resources[] = {
+ {
+ .start = OMAP34XX_GPIO1_BASE,
+ .end = OMAP34XX_GPIO1_BASE + OMAP3_GPIO_AS_LEN - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = INT_34XX_GPIO_BANK1,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct __initdata omap_gpio_platform_data omap3_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 omap3_gpio1 = {
+ .name = "omap-gpio",
+ .id = 0,
+ .dev = {
+ .platform_data = &omap3_gpio1_config,
+ },
+ .num_resources = ARRAY_SIZE(omap3_gpio1_resources),
+ .resource = omap3_gpio1_resources,
+};
+
+/*
+ * OMAP3 GPIO2 interface data
+ */
+static struct __initdata resource omap3_gpio2_resources[] = {
+ {
+ .start = OMAP34XX_GPIO2_BASE,
+ .end = OMAP34XX_GPIO2_BASE + OMAP3_GPIO_AS_LEN - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = INT_34XX_GPIO_BANK2,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct __initdata omap_gpio_platform_data omap3_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 omap3_gpio2 = {
+ .name = "omap-gpio",
+ .id = 1,
+ .dev = {
+ .platform_data = &omap3_gpio2_config,
+ },
+ .num_resources = ARRAY_SIZE(omap3_gpio2_resources),
+ .resource = omap3_gpio2_resources,
+};
+
+/*
+ * OMAP3 GPIO3 interface data
+ */
+static struct __initdata resource omap3_gpio3_resources[] = {
+ {
+ .start = OMAP34XX_GPIO3_BASE,
+ .end = OMAP34XX_GPIO3_BASE + OMAP3_GPIO_AS_LEN - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = INT_34XX_GPIO_BANK3,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct __initdata omap_gpio_platform_data omap3_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 omap3_gpio3 = {
+ .name = "omap-gpio",
+ .id = 2,
+ .dev = {
+ .platform_data = &omap3_gpio3_config,
+ },
+ .num_resources = ARRAY_SIZE(omap3_gpio3_resources),
+ .resource = omap3_gpio3_resources,
+};
+
+/*
+ * OMAP3 GPIO4 interface data
+ */
+static struct __initdata resource omap3_gpio4_resources[] = {
+ {
+ .start = OMAP34XX_GPIO4_BASE,
+ .end = OMAP34XX_GPIO4_BASE + OMAP3_GPIO_AS_LEN - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = INT_34XX_GPIO_BANK4,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct __initdata omap_gpio_platform_data omap3_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 omap3_gpio4 = {
+ .name = "omap-gpio",
+ .id = 3,
+ .dev = {
+ .platform_data = &omap3_gpio4_config,
+ },
+ .num_resources = ARRAY_SIZE(omap3_gpio4_resources),
+ .resource = omap3_gpio4_resources,
+};
+
+/*
+ * OMAP3 GPIO5 interface data
+ */
+static struct __initdata resource omap3_gpio5_resources[] = {
+ {
+ .start = OMAP34XX_GPIO5_BASE,
+ .end = OMAP34XX_GPIO5_BASE + OMAP3_GPIO_AS_LEN - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = INT_34XX_GPIO_BANK5,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct __initdata omap_gpio_platform_data omap3_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 omap3_gpio5 = {
+ .name = "omap-gpio",
+ .id = 4,
+ .dev = {
+ .platform_data = &omap3_gpio5_config,
+ },
+ .num_resources = ARRAY_SIZE(omap3_gpio5_resources),
+ .resource = omap3_gpio5_resources,
+};
+
+/*
+ * OMAP3 GPIO6 interface data
+ */
+static struct __initdata resource omap3_gpio6_resources[] = {
+ {
+ .start = OMAP34XX_GPIO6_BASE,
+ .end = OMAP34XX_GPIO6_BASE + OMAP3_GPIO_AS_LEN - 1,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = INT_34XX_GPIO_BANK6,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct __initdata omap_gpio_platform_data omap3_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 omap3_gpio6 = {
+ .name = "omap-gpio",
+ .id = 5,
+ .dev = {
+ .platform_data = &omap3_gpio6_config,
+ },
+ .num_resources = ARRAY_SIZE(omap3_gpio6_resources),
+ .resource = omap3_gpio6_resources,
+};
+
+static struct __initdata platform_device * omap3_gpio_early_dev[] = {
+ &omap3_gpio1,
+ &omap3_gpio2,
+ &omap3_gpio3,
+ &omap3_gpio4,
+ &omap3_gpio5,
+ &omap3_gpio6
+};
+
+static struct gpio_bank *omap3_get_gpio_bank(int gpio,
+ struct gpio_bank *gpio_bank)
+{
+ if (cpu_is_omap34xx())
+ return &gpio_bank[gpio >> 5];
+ BUG();
+ return NULL;
+}
+
+static int set_omap3_gpio_triggering(struct gpio_bank *bank, int gpio,
+ int trigger)
+{
+ void __iomem *base = bank->base;
+ u32 gpio_bit = 1 << gpio;
+
+ if (!cpu_is_omap34xx())
+ return -EINVAL;
+
+ MOD_REG_BIT(OMAP24XX_GPIO_LEVELDETECT0, gpio_bit,
+ trigger & IRQ_TYPE_LEVEL_LOW);
+ MOD_REG_BIT(OMAP24XX_GPIO_LEVELDETECT1, gpio_bit,
+ trigger & IRQ_TYPE_LEVEL_HIGH);
+ MOD_REG_BIT(OMAP24XX_GPIO_RISINGDETECT, gpio_bit,
+ trigger & IRQ_TYPE_EDGE_RISING);
+ MOD_REG_BIT(OMAP24XX_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
+ + OMAP24XX_GPIO_SETWKUENA);
+ else
+ __raw_writel(1 << gpio, bank->base
+ + OMAP24XX_GPIO_CLEARWKUENA);
+ } 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 + OMAP24XX_GPIO_LEVELDETECT0) |
+ __raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT1);
+
+ return 0;
+}
+
+void __init omap3_gpio_mod_init(struct gpio_bank *bank, int i)
+{
+ static const u32 non_wakeup_gpios[] = {
+ 0xe203ffc0, 0x08700040
+ };
+
+ /*
+ * Initialize interface clock ungated,
+ * module enabled
+ */
+ __raw_writel(0x00000000, bank->base + OMAP24XX_GPIO_IRQENABLE1);
+ __raw_writel(0xffffffff, bank->base + OMAP24XX_GPIO_IRQSTATUS1);
+ __raw_writew(0x0015, bank->base + OMAP24XX_GPIO_SYSCONFIG);
+ __raw_writew(0x00000000, bank->base + OMAP24XX_GPIO_DEBOUNCE_EN);
+ __raw_writew(0x0, bank->base + OMAP24XX_GPIO_CTRL);
+
+ if (i < ARRAY_SIZE(non_wakeup_gpios))
+ bank->non_wakeup_gpios = non_wakeup_gpios[i];
+}
+
+/*
+ * OMAP3 GPIO function pointers, reg offsets pointer and other info
+ */
+static struct omap_gpio_info omap3_gpio_data = {
+ .reg_off = &omap3_gpio_reg,
+ .index_mask = 0x1f,
+ .no_of_gpio = 192,
+ .bank_count = OMAP34XX_NR_GPIOS,
+ .bank_bits = 32,
+ .get_gpio_bank = omap3_get_gpio_bank,
+ .gpio_mod_init = omap3_gpio_mod_init,
+ .set_gpio_triggering = set_omap3_gpio_triggering,
+};
+
+void __init omap3_gpio_init_data(void)
+{
+ gpio_init(&omap3_gpio_data);
+}
+
+int __init omap3_early_init_gpio(struct platform_device ***pdev)
+{
+ *pdev = omap3_gpio_early_dev;
+ return OMAP34XX_NR_GPIOS;
+}
+
+int __init omap3_gpio_dev_reg(void)
+{
+ if (cpu_is_omap34xx()) {
+ platform_device_register(&omap3_gpio1);
+ platform_device_register(&omap3_gpio2);
+ platform_device_register(&omap3_gpio3);
+ platform_device_register(&omap3_gpio4);
+ platform_device_register(&omap3_gpio5);
+ platform_device_register(&omap3_gpio6);
+ }
+ return 0;
+}
+arch_initcall(omap3_gpio_dev_reg);
diff --git a/arch/arm/mach-omap2/include/mach/gpio.h b/arch/arm/mach-omap2/include/mach/gpio.h
index 0b90a72..07bfa0f 100644
--- a/arch/arm/mach-omap2/include/mach/gpio.h
+++ b/arch/arm/mach-omap2/include/mach/gpio.h
@@ -1,6 +1,8 @@
/*
* arch/arm/mach-omap2/include/mach/gpio.h
*/
+#ifndef __ASM_ARCH_OMAP2PLUS_GPIO_H
+#define __ASM_ARCH_OMAP2PLUS_GPIO_H

#include <plat/gpio.h>

@@ -18,6 +20,8 @@
#define OMAP243X_GPIO4_BASE 0x49012000
#define OMAP243X_GPIO5_BASE 0x480B6000

+#define OMAP2_GPIO_AS_LEN 4096
+
/*
* omap34xx specific GPIO registers
*/
@@ -29,7 +33,7 @@
#define OMAP34XX_GPIO6_BASE 0x49058000

#define OMAP34XX_NR_GPIOS 6
-
+#define OMAP3_GPIO_AS_LEN 4096
/*
* OMAP44XX specific GPIO registers
*/
@@ -40,6 +44,9 @@
#define OMAP44XX_GPIO5_BASE 0x4805B000
#define OMAP44XX_GPIO6_BASE 0x4805D000

+#define OMAP4_GPIO_AS_LEN 4096
+#define OMAP4_NR_GPIOS 6
+
/*
* GPIO register offsets
*/
@@ -102,3 +109,7 @@
#define OMAP4_GPIO_SETWKUENA 0x0184
#define OMAP4_GPIO_CLEARDATAOUT 0x0190
#define OMAP4_GPIO_SETDATAOUT 0x0194
+
+extern void omap3_gpio_init_data(void);
+extern int omap3_early_init_gpio(struct platform_device ***pdev);
+#endif
--
1.6.3.3