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/*
* 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>
#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 __initdata 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 __initdata 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 __initdata 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 __initdata 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 __initdata 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 __initdata 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 __initdata 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 __initdata 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 __initdata 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 __initdata 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 __initdata platform_device * omap16xx_gpio_dev[] = {
&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);
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