diff options
Diffstat (limited to 'kernel/arch/arm/mach-omap1/gpio16xx.c')
| -rw-r--r-- | kernel/arch/arm/mach-omap1/gpio16xx.c | 257 |
1 files changed, 257 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-omap1/gpio16xx.c b/kernel/arch/arm/mach-omap1/gpio16xx.c new file mode 100644 index 000000000..6e6ec93dc --- /dev/null +++ b/kernel/arch/arm/mach-omap1/gpio16xx.c @@ -0,0 +1,257 @@ +/* + * OMAP16xx specific gpio init + * + * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/ + * + * 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 as + * published by the Free Software Foundation version 2. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/gpio.h> +#include <linux/platform_data/gpio-omap.h> + +#include <mach/irqs.h> + +#define OMAP1610_GPIO1_BASE 0xfffbe400 +#define OMAP1610_GPIO2_BASE 0xfffbec00 +#define OMAP1610_GPIO3_BASE 0xfffbb400 +#define OMAP1610_GPIO4_BASE 0xfffbbc00 +#define OMAP1_MPUIO_VBASE OMAP1_MPUIO_BASE + +/* smart idle, enable wakeup */ +#define SYSCONFIG_WORD 0x14 + +/* mpu gpio */ +static struct resource omap16xx_mpu_gpio_resources[] = { + { + .start = OMAP1_MPUIO_VBASE, + .end = OMAP1_MPUIO_VBASE + SZ_2K - 1, + .flags = IORESOURCE_MEM, + }, + { + .start = INT_MPUIO, + .flags = IORESOURCE_IRQ, + }, +}; + +static struct omap_gpio_reg_offs omap16xx_mpuio_regs = { + .revision = USHRT_MAX, + .direction = OMAP_MPUIO_IO_CNTL, + .datain = OMAP_MPUIO_INPUT_LATCH, + .dataout = OMAP_MPUIO_OUTPUT, + .irqstatus = OMAP_MPUIO_GPIO_INT, + .irqenable = OMAP_MPUIO_GPIO_MASKIT, + .irqenable_inv = true, + .irqctrl = OMAP_MPUIO_GPIO_INT_EDGE, +}; + +static struct omap_gpio_platform_data omap16xx_mpu_gpio_config = { + .is_mpuio = true, + .bank_width = 16, + .bank_stride = 1, + .regs = &omap16xx_mpuio_regs, +}; + +static struct platform_device omap16xx_mpu_gpio = { + .name = "omap_gpio", + .id = 0, + .dev = { + .platform_data = &omap16xx_mpu_gpio_config, + }, + .num_resources = ARRAY_SIZE(omap16xx_mpu_gpio_resources), + .resource = omap16xx_mpu_gpio_resources, +}; + +/* gpio1 */ +static struct resource omap16xx_gpio1_resources[] = { + { + .start = OMAP1610_GPIO1_BASE, + .end = OMAP1610_GPIO1_BASE + SZ_2K - 1, + .flags = IORESOURCE_MEM, + }, + { + .start = INT_GPIO_BANK1, + .flags = IORESOURCE_IRQ, + }, +}; + +static struct omap_gpio_reg_offs omap16xx_gpio_regs = { + .revision = OMAP1610_GPIO_REVISION, + .direction = OMAP1610_GPIO_DIRECTION, + .set_dataout = OMAP1610_GPIO_SET_DATAOUT, + .clr_dataout = OMAP1610_GPIO_CLEAR_DATAOUT, + .datain = OMAP1610_GPIO_DATAIN, + .dataout = OMAP1610_GPIO_DATAOUT, + .irqstatus = OMAP1610_GPIO_IRQSTATUS1, + .irqenable = OMAP1610_GPIO_IRQENABLE1, + .set_irqenable = OMAP1610_GPIO_SET_IRQENABLE1, + .clr_irqenable = OMAP1610_GPIO_CLEAR_IRQENABLE1, + .wkup_en = OMAP1610_GPIO_WAKEUPENABLE, + .edgectrl1 = OMAP1610_GPIO_EDGE_CTRL1, + .edgectrl2 = OMAP1610_GPIO_EDGE_CTRL2, +}; + +static struct omap_gpio_platform_data omap16xx_gpio1_config = { + .bank_width = 16, + .regs = &omap16xx_gpio_regs, +}; + +static struct platform_device omap16xx_gpio1 = { + .name = "omap_gpio", + .id = 1, + .dev = { + .platform_data = &omap16xx_gpio1_config, + }, + .num_resources = ARRAY_SIZE(omap16xx_gpio1_resources), + .resource = omap16xx_gpio1_resources, +}; + +/* gpio2 */ +static struct resource omap16xx_gpio2_resources[] = { + { + .start = OMAP1610_GPIO2_BASE, + .end = OMAP1610_GPIO2_BASE + SZ_2K - 1, + .flags = IORESOURCE_MEM, + }, + { + .start = INT_1610_GPIO_BANK2, + .flags = IORESOURCE_IRQ, + }, +}; + +static struct omap_gpio_platform_data omap16xx_gpio2_config = { + .bank_width = 16, + .regs = &omap16xx_gpio_regs, +}; + +static struct platform_device omap16xx_gpio2 = { + .name = "omap_gpio", + .id = 2, + .dev = { + .platform_data = &omap16xx_gpio2_config, + }, + .num_resources = ARRAY_SIZE(omap16xx_gpio2_resources), + .resource = omap16xx_gpio2_resources, +}; + +/* gpio3 */ +static struct resource omap16xx_gpio3_resources[] = { + { + .start = OMAP1610_GPIO3_BASE, + .end = OMAP1610_GPIO3_BASE + SZ_2K - 1, + .flags = IORESOURCE_MEM, + }, + { + .start = INT_1610_GPIO_BANK3, + .flags = IORESOURCE_IRQ, + }, +}; + +static struct omap_gpio_platform_data omap16xx_gpio3_config = { + .bank_width = 16, + .regs = &omap16xx_gpio_regs, +}; + +static struct platform_device omap16xx_gpio3 = { + .name = "omap_gpio", + .id = 3, + .dev = { + .platform_data = &omap16xx_gpio3_config, + }, + .num_resources = ARRAY_SIZE(omap16xx_gpio3_resources), + .resource = omap16xx_gpio3_resources, +}; + +/* gpio4 */ +static struct resource omap16xx_gpio4_resources[] = { + { + .start = OMAP1610_GPIO4_BASE, + .end = OMAP1610_GPIO4_BASE + SZ_2K - 1, + .flags = IORESOURCE_MEM, + }, + { + .start = INT_1610_GPIO_BANK4, + .flags = IORESOURCE_IRQ, + }, +}; + +static struct omap_gpio_platform_data omap16xx_gpio4_config = { + .bank_width = 16, + .regs = &omap16xx_gpio_regs, +}; + +static struct platform_device omap16xx_gpio4 = { + .name = "omap_gpio", + .id = 4, + .dev = { + .platform_data = &omap16xx_gpio4_config, + }, + .num_resources = ARRAY_SIZE(omap16xx_gpio4_resources), + .resource = omap16xx_gpio4_resources, +}; + +static struct platform_device *omap16xx_gpio_dev[] __initdata = { + &omap16xx_mpu_gpio, + &omap16xx_gpio1, + &omap16xx_gpio2, + &omap16xx_gpio3, + &omap16xx_gpio4, +}; + +/* + * omap16xx_gpio_init needs to be done before + * machine_init functions access gpio APIs. + * Hence omap16xx_gpio_init is a postcore_initcall. + */ +static int __init omap16xx_gpio_init(void) +{ + int i; + void __iomem *base; + struct resource *res; + struct platform_device *pdev; + struct omap_gpio_platform_data *pdata; + + if (!cpu_is_omap16xx()) + return -EINVAL; + + /* + * Enable system clock for GPIO module. + * The CAM_CLK_CTRL *is* really the right place. + */ + omap_writel(omap_readl(ULPD_CAM_CLK_CTRL) | 0x04, + ULPD_CAM_CLK_CTRL); + + for (i = 0; i < ARRAY_SIZE(omap16xx_gpio_dev); i++) { + pdev = omap16xx_gpio_dev[i]; + pdata = pdev->dev.platform_data; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (unlikely(!res)) { + dev_err(&pdev->dev, "Invalid mem resource.\n"); + return -ENODEV; + } + + base = ioremap(res->start, resource_size(res)); + if (unlikely(!base)) { + dev_err(&pdev->dev, "ioremap failed.\n"); + return -ENOMEM; + } + + __raw_writel(SYSCONFIG_WORD, base + OMAP1610_GPIO_SYSCONFIG); + iounmap(base); + + platform_device_register(omap16xx_gpio_dev[i]); + } + + return 0; +} +postcore_initcall(omap16xx_gpio_init); |