This patch adds support for handling OMAP1 specific GPIO operations
including gpio_init
Signed-off-by: Charulatha V <charu@xxxxxx>
---
arch/arm/mach-omap1/gpio.c | 404 ++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 404 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-omap1/gpio.c
diff --git a/arch/arm/mach-omap1/gpio.c b/arch/arm/mach-omap1/gpio.c
new file mode 100644
index 0000000..e54ce07
--- /dev/null
+++ b/arch/arm/mach-omap1/gpio.c
@@ -0,0 +1,404 @@
+/*
+ * gpio.c - OMAP1 architecture specific common gpio code
+ *
+ * Copyright (C) 2010 Texas Instruments, Inc.
+ *
+ * Author:
+ * Charulatha V <charu@xxxxxx>
+ *
+ * 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>
+
+static struct gpio_bank omap1610_gpio_bank[5] = {
+ { OMAP1_MPUIO_VBASE, NULL, INT_MPUIO, IH_MPUIO_BASE,
+ METHOD_MPUIO },
+ { OMAP1610_GPIO1_BASE, NULL, INT_GPIO_BANK1, IH_GPIO_BASE,
+ METHOD_GPIO_1610 },
+ { OMAP1610_GPIO2_BASE, NULL, INT_1610_GPIO_BANK2, IH_GPIO_BASE + 16,
+ METHOD_GPIO_1610 },
+ { OMAP1610_GPIO3_BASE, NULL, INT_1610_GPIO_BANK3, IH_GPIO_BASE + 32,
+ METHOD_GPIO_1610 },
+ { OMAP1610_GPIO4_BASE, NULL, INT_1610_GPIO_BANK4, IH_GPIO_BASE + 48,
+ METHOD_GPIO_1610 },
+};
+
+static struct gpio_bank omap1510_gpio_bank[2] = {
+ { OMAP1_MPUIO_VBASE, NULL, INT_MPUIO, IH_MPUIO_BASE,
+ METHOD_MPUIO },
+ { OMAP1510_GPIO_BASE, NULL, INT_GPIO_BANK1, IH_GPIO_BASE,
+ METHOD_GPIO_1510 }
+};
+
+static struct gpio_bank omap7xx_gpio_bank[7] = {
+ { OMAP1_MPUIO_VBASE, NULL, INT_7XX_MPUIO, IH_MPUIO_BASE,
+ METHOD_MPUIO },
+ { OMAP7XX_GPIO1_BASE, NULL, INT_7XX_GPIO_BANK1, IH_GPIO_BASE,
+ METHOD_GPIO_7XX },
+ { OMAP7XX_GPIO2_BASE, NULL, INT_7XX_GPIO_BANK2, IH_GPIO_BASE + 32,
+ METHOD_GPIO_7XX },
+ { OMAP7XX_GPIO3_BASE, NULL, INT_7XX_GPIO_BANK3, IH_GPIO_BASE + 64,
+ METHOD_GPIO_7XX },
+ { OMAP7XX_GPIO4_BASE, NULL, INT_7XX_GPIO_BANK4, IH_GPIO_BASE + 96,
+ METHOD_GPIO_7XX },
+ { OMAP7XX_GPIO5_BASE, NULL, INT_7XX_GPIO_BANK5, IH_GPIO_BASE + 128,
+ METHOD_GPIO_7XX },
+ { OMAP7XX_GPIO6_BASE, NULL, INT_7XX_GPIO_BANK6, IH_GPIO_BASE + 160,
+ METHOD_GPIO_7XX },
+};
+
+static struct gpio_reg_offset omap1610_gpio_reg = {
+ .data_in = OMAP1610_GPIO_DATAIN,
+ .data_out = OMAP1610_GPIO_DATAOUT,
+ .data_out_set = OMAP1610_GPIO_SET_DATAOUT,
+ .data_out_clear = OMAP1610_GPIO_CLEAR_DATAOUT,
+ .dir_ctrl = OMAP1610_GPIO_DIRECTION,
+ .irq_status0 = OMAP1610_GPIO_IRQSTATUS1,
+ .irq_mask = OMAP1610_GPIO_IRQENABLE1,
+ .irq_set = OMAP1610_GPIO_SET_IRQENABLE1,
+ .irq_clear = OMAP1610_GPIO_CLEAR_IRQENABLE1,
+ .irq_mask_bits = 0xffff,
+ .irq_inv = 0,
+ .wkup_enable = OMAP1610_GPIO_WAKEUPENABLE,
+ .wkup_clear = OMAP1610_GPIO_CLEAR_WAKEUPENA,
+ .wkup_set = OMAP1610_GPIO_SET_WAKEUPENA,
+ .syscfg = OMAP1610_GPIO_SYSCONFIG,
+};
+
+static struct gpio_reg_offset omap1510_gpio_reg = {
+ .data_in = OMAP1510_GPIO_DATA_INPUT,
+ .data_out = OMAP1510_GPIO_DATA_OUTPUT,
+ .dir_ctrl = OMAP1510_GPIO_DIR_CONTROL,
+ .irq_status0 = OMAP1510_GPIO_INT_STATUS,
+ .irq_mask = OMAP1510_GPIO_INT_MASK,
+ .irq_mask_bits = 0xffff,
+ .irq_inv = 1,
+ .ctrl = OMAP1510_GPIO_PIN_CONTROL,
+};
+
+static struct gpio_reg_offset omap7xx_gpio_reg = {
+ .data_in = OMAP7XX_GPIO_DATA_INPUT,
+ .data_out = OMAP7XX_GPIO_DATA_OUTPUT,
+ .dir_ctrl = OMAP7XX_GPIO_DIR_CONTROL,
+ .irq_status0 = OMAP7XX_GPIO_INT_STATUS,
+ .irq_mask = OMAP7XX_GPIO_INT_MASK,
+ .irq_mask_bits = 0xffffffff,
+ .irq_inv = 1,
+};
+
+static struct mpu_gpio_reg_off omap1_gpio_mpureg = {
+ .mpu_io_ctrl = OMAP_MPUIO_IO_CNTL,
+ .mpu_data_out = OMAP_MPUIO_OUTPUT,
+ .mpu_data_in = OMAP_MPUIO_INPUT_LATCH,
+ .mpu_isr = OMAP_MPUIO_GPIO_INT,
+ .mpu_irq_mask = OMAP_MPUIO_GPIO_MASKIT,
+ .mpu_irq_mask_bits = 0xffff,
+ .mpu_irq_inv = 1,
+};
+
+static struct gpio_bank *omap1_get_gpio_bank(int gpio,
+ struct gpio_bank *gpio_bank)
+{
+ if (cpu_is_omap15xx()) {
+ if (OMAP_GPIO_IS_MPUIO(gpio))
+ return &gpio_bank[0];
+ return &gpio_bank[1];
+ } else if (cpu_is_omap16xx()) {
+ if (OMAP_GPIO_IS_MPUIO(gpio))
+ return &gpio_bank[0];
+ return &gpio_bank[1 + (gpio >> 4)];
+ } else if (cpu_is_omap7xx()) {
+ if (OMAP_GPIO_IS_MPUIO(gpio))
+ return &gpio_bank[0];
+ return &gpio_bank[1 + (gpio >> 5)];
+ }
+ BUG();
+ return NULL;
+}
+
+/*
+ * This only applies to chips that can't do both rising and falling edge
+ * detection at once. For all other chips, this function is a noop.
+ */
+static void omap1_toggle_edge_triggering(struct gpio_bank *bank, int gpio)
+{
+ void __iomem *reg = bank->base;
+ u32 l = 0;
+
+ switch (bank->method) {
+ case METHOD_MPUIO:
+ reg += OMAP_MPUIO_GPIO_INT_EDGE;
+ break;
+ case METHOD_GPIO_1510:
+ reg += OMAP1510_GPIO_INT_CONTROL;
+ break;
+ case METHOD_GPIO_7XX:
+ reg += OMAP7XX_GPIO_INT_CONTROL;
+ break;
+ default:
+ return;
+ }
+
+ l = __raw_readl(reg);
+ if ((l >> gpio) & 1)
+ l &= ~(1 << gpio);
+ else
+ l |= 1 << gpio;
+
+ __raw_writel(l, reg);
+}
+
+static int set_omap1_gpio_triggering(struct gpio_bank *bank, int gpio,
+ int trigger)
+{
+ void __iomem *reg = bank->base;
+ u32 l = 0;
+
+ switch (bank->method) {
+ case METHOD_MPUIO:
+ reg += OMAP_MPUIO_GPIO_INT_EDGE;
+ l = __raw_readl(reg);
+ if (trigger & IRQ_TYPE_EDGE_BOTH)
+ bank->toggle_mask |= 1 << gpio;
+ if (trigger & IRQ_TYPE_EDGE_RISING)
+ l |= 1 << gpio;
+ else if (trigger & IRQ_TYPE_EDGE_FALLING)
+ l &= ~(1 << gpio);
+ else
+ goto bad;
+ break;
+ case METHOD_GPIO_1510:
+ reg += OMAP1510_GPIO_INT_CONTROL;
+ l = __raw_readl(reg);
+ if (trigger & IRQ_TYPE_EDGE_BOTH)
+ bank->toggle_mask |= 1 << gpio;
+ if (trigger & IRQ_TYPE_EDGE_RISING)
+ l |= 1 << gpio;
+ else if (trigger & IRQ_TYPE_EDGE_FALLING)
+ l &= ~(1 << gpio);
+ else
+ goto bad;
+ break;
+ case METHOD_GPIO_1610:
+ if (gpio & 0x08)
+ reg += OMAP1610_GPIO_EDGE_CTRL2;
+ else
+ reg += OMAP1610_GPIO_EDGE_CTRL1;
+ gpio &= 0x07;
+ l = __raw_readl(reg);
+ l &= ~(3 << (gpio << 1));
+ if (trigger & IRQ_TYPE_EDGE_RISING)
+ l |= 2 << (gpio << 1);
+ if (trigger & IRQ_TYPE_EDGE_FALLING)
+ l |= 1 << (gpio << 1);
+ if (trigger)
+ /* Enable wake-up during idle for dynamic tick */
+ __raw_writel(1 << gpio, bank->base +
+ OMAP1610_GPIO_SET_WAKEUPENA);
+ else
+ __raw_writel(1 << gpio, bank->base +
+ OMAP1610_GPIO_CLEAR_WAKEUPENA);
+ break;
+ case METHOD_GPIO_7XX:
+ reg += OMAP7XX_GPIO_INT_CONTROL;
+ l = __raw_readl(reg);
+ if (trigger & IRQ_TYPE_EDGE_BOTH)
+ bank->toggle_mask |= 1 << gpio;
+ if (trigger & IRQ_TYPE_EDGE_RISING)
+ l |= 1 << gpio;
+ else if (trigger & IRQ_TYPE_EDGE_FALLING)
+ l &= ~(1 << gpio);
+ else
+ goto bad;
+ break;
+ default:
+ goto bad;
+ }
+ __raw_writel(l, reg);
+ return 0;
+bad:
+ return -EINVAL;
+}
+
+#ifdef CONFIG_ARCH_OMAP16XX
+static int omap_mpuio_suspend_noirq(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct gpio_bank *bank = platform_get_drvdata(pdev);
+ void __iomem *mask_reg = bank->base + OMAP_MPUIO_GPIO_MASKIT;
+ unsigned long flags;
+
+ spin_lock_irqsave(&bank->lock, flags);
+ bank->saved_wakeup = __raw_readl(mask_reg);
+ __raw_writel(0xffff & ~bank->suspend_wakeup, mask_reg);
+ spin_unlock_irqrestore(&bank->lock, flags);
+
+ return 0;
+}
+
+static int omap_mpuio_resume_noirq(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct gpio_bank *bank = platform_get_drvdata(pdev);
+ void __iomem *mask_reg = bank->base + OMAP_MPUIO_GPIO_MASKIT;
+ unsigned long flags;
+
+ spin_lock_irqsave(&bank->lock, flags);
+ __raw_writel(bank->saved_wakeup, mask_reg);
+ spin_unlock_irqrestore(&bank->lock, flags);
+
+ return 0;
+}
+
+static const struct dev_pm_ops omap_mpuio_dev_pm_ops = {
+ .suspend_noirq = omap_mpuio_suspend_noirq,
+ .resume_noirq = omap_mpuio_resume_noirq,
+};
+
+/* use platform_driver for this, now that there's no longer any
+ * point to sys_device (other than not disturbing old code).
+ */
+static struct platform_driver omap_mpuio_driver = {
+ .driver = {
+ .name = "mpuio",
+ .pm = &omap_mpuio_dev_pm_ops,
+ },
+};
+
+static struct platform_device omap_mpuio_device = {
+ .name = "mpuio",
+ .id = -1,
+ .dev = {
+ .driver = &omap_mpuio_driver.driver,
+ }
+ /* could list the /proc/iomem resources */
+};
+
+void mpuio_init(void)
+{
+ platform_set_drvdata(&omap_mpuio_device, &omap1610_gpio_bank[0]);
+
+ if (platform_driver_register(&omap_mpuio_driver) == 0)
+ (void) platform_device_register(&omap_mpuio_device);
+}
+#else
+static struct platform_device omap_mpuio_device;
+void mpuio_init(void) {}
+#endif
+
+/*
+ * OMAP1 GPIO function pointers, reg offset pointer and other info
+ */
+static struct omap_gpio_info omap1_gpio_data = {
+ .get_gpio_bank = omap1_get_gpio_bank,
+ .set_gpio_triggering = set_omap1_gpio_triggering,
+ .toggle_edge_triggering = omap1_toggle_edge_triggering,
+ .mpu_reg = &omap1_gpio_mpureg,
+};
+
+static void __init omap1_init_gpio(struct gpio_bank *gpio_bank)
+{
+ int i;
+ struct gpio_bank *bank;
+
+ if (cpu_is_omap15xx()) {
+ struct clk *gpio_ick;
+ gpio_ick = clk_get(NULL, "arm_gpio_ck");
+ if (IS_ERR(gpio_ick))
+ printk(KERN_ERR "Could not get arm_gpio_ck\n");
+ else
+ clk_enable(gpio_ick);
+ }
+
+ for (i = 0; i < omap1_gpio_data.bank_count; i++) {
+ bank = &gpio_bank[i];
+ spin_lock_init(&bank->lock);
+
+ /* Static mapping, never released */
+ bank->base = ioremap(bank->pbase, SZ_2K);
+ if (!bank->base) {
+ printk(KERN_ERR "Could not ioremap gpio bank%i\n", i);
+ continue;
+ }
+ }
+
+ if (bank_is_mpuio(bank))
+ __raw_writew(0xffff, bank->base + OMAP_MPUIO_GPIO_MASKIT);
+ else if (cpu_is_omap15xx() && bank->method == METHOD_GPIO_1510) {
+ __raw_writew(0xffff, bank->base + OMAP1510_GPIO_INT_MASK);
+ __raw_writew(0x0000, bank->base + OMAP1510_GPIO_INT_STATUS);
+ } else if (cpu_is_omap16xx() && bank->method == METHOD_GPIO_1610) {
+ __raw_writew(0x0000, bank->base + OMAP1610_GPIO_IRQENABLE1);
+ __raw_writew(0xffff, bank->base + OMAP1610_GPIO_IRQSTATUS1);
+ __raw_writew(0x0014, bank->base + OMAP1610_GPIO_SYSCONFIG);
+ } else if (cpu_is_omap7xx() && bank->method == METHOD_GPIO_7XX) {
+ __raw_writel(0xffffffff, bank->base + OMAP7XX_GPIO_INT_MASK);
+ __raw_writel(0x00000000, bank->base + OMAP7XX_GPIO_INT_STATUS);
+ }
+
+ if (cpu_is_omap16xx()) {
+ u32 rev;
+ /* Enable system clock for GPIO module.
+ * The CAM_CLK_CTRL *is* really the right place.
+ */
+ bank->chip.dev = &omap_mpuio_device.dev;
+ if (bank_is_mpuio(bank))
+ omap_writel(omap_readl(ULPD_CAM_CLK_CTRL) |
+ 0x04, ULPD_CAM_CLK_CTRL);
+ rev = __raw_readw(gpio_bank[1].base + OMAP1610_GPIO_REVISION);
+ printk(KERN_INFO "OMAP GPIO hardware version %d.%d\n",
+ (rev >> 4) & 0x0f, rev & 0x0f);
+ }
+}
+
+static void __init omap1_gpio_init(void)
+{
+ if (cpu_is_omap16xx()) {
+ omap1_gpio_data.reg_off = &omap1610_gpio_reg;
+ omap1_gpio_data.index_mask = 0x0f;
+ omap1_gpio_data.no_of_gpio = 64;
+ omap1_gpio_data.bank_count = 5;
+ omap1_gpio_data.bank_bits = 16;
+ omap1_gpio_data.gpio_bank = omap1610_gpio_bank;
+ } else if (cpu_is_omap15xx()) {
+ omap1_gpio_data.reg_off = &omap1510_gpio_reg;
+ omap1_gpio_data.index_mask = 0x0f;
+ omap1_gpio_data.no_of_gpio = 16;
+ omap1_gpio_data.bank_count = 2;
+ omap1_gpio_data.bank_bits = 16;
+ omap1_gpio_data.gpio_bank = omap1510_gpio_bank;
+ } else if (cpu_is_omap7xx()) {
+ omap1_gpio_data.reg_off = &omap7xx_gpio_reg;
+ omap1_gpio_data.index_mask = 0x1f;
+ omap1_gpio_data.no_of_gpio = 192;
+ omap1_gpio_data.bank_count = 7;
+ omap1_gpio_data.bank_bits = 32;
+ omap1_gpio_data.gpio_bank = omap7xx_gpio_bank;
+ }
+ omap1_init_gpio(omap1_gpio_data.gpio_bank);
+ gpio_init(&omap1_gpio_data);
+}
+
+/*
+ * This may get called early from board specific init
+ * for boards that have interrupts routed via FPGA.
+ */
+int __init omap_gpio_init(void)
+{
+ int i;
+ static int initialized;
+
+ if ((!initialized) && cpu_class_is_omap1()) {
+ omap1_gpio_init();
+ for (i = 0; i < omap1_gpio_data.bank_count; i++)
+ init_gpio_chip_irq(omap1_gpio_data.gpio_bank);
+
+ mpuio_init();
+ }
+ initialized = 1;
+
+ return 0;
+}
--
1.6.3.3
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