diff options
Diffstat (limited to 'arch/arm/mach-imx/generic.c')
| -rw-r--r-- | arch/arm/mach-imx/generic.c | 307 |
1 files changed, 307 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/generic.c b/arch/arm/mach-imx/generic.c new file mode 100644 index 0000000..fa72174 --- /dev/null +++ b/arch/arm/mach-imx/generic.c @@ -0,0 +1,307 @@ +/* + * arch/arm/mach-imx/generic.c + * + * author: Sascha Hauer + * Created: april 20th, 2004 + * Copyright: Synertronixx GmbH + * + * Common code for i.MX machines + * + * 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; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ +#include <linux/platform_device.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/string.h> + +#include <asm/errno.h> +#include <mach/imxfb.h> +#include <mach/hardware.h> +#include <mach/imx-regs.h> + +#include <asm/mach/map.h> +#include <mach/mmc.h> +#include <mach/gpio.h> + +unsigned long imx_gpio_alloc_map[(GPIO_PORT_MAX + 1) * 32 / BITS_PER_LONG]; + +void imx_gpio_mode(int gpio_mode) +{ + unsigned int pin = gpio_mode & GPIO_PIN_MASK; + unsigned int port = (gpio_mode & GPIO_PORT_MASK) >> GPIO_PORT_SHIFT; + unsigned int ocr = (gpio_mode & GPIO_OCR_MASK) >> GPIO_OCR_SHIFT; + unsigned int tmp; + + /* Pullup enable */ + if(gpio_mode & GPIO_PUEN) + PUEN(port) |= (1<<pin); + else + PUEN(port) &= ~(1<<pin); + + /* Data direction */ + if(gpio_mode & GPIO_OUT) + DDIR(port) |= 1<<pin; + else + DDIR(port) &= ~(1<<pin); + + /* Primary / alternate function */ + if(gpio_mode & GPIO_AF) + GPR(port) |= (1<<pin); + else + GPR(port) &= ~(1<<pin); + + /* use as gpio? */ + if(gpio_mode & GPIO_GIUS) + GIUS(port) |= (1<<pin); + else + GIUS(port) &= ~(1<<pin); + + /* Output / input configuration */ + /* FIXME: I'm not very sure about OCR and ICONF, someone + * should have a look over it + */ + if(pin<16) { + tmp = OCR1(port); + tmp &= ~( 3<<(pin*2)); + tmp |= (ocr << (pin*2)); + OCR1(port) = tmp; + + ICONFA1(port) &= ~( 3<<(pin*2)); + ICONFA1(port) |= ((gpio_mode >> GPIO_AOUT_SHIFT) & 3) << (pin * 2); + ICONFB1(port) &= ~( 3<<(pin*2)); + ICONFB1(port) |= ((gpio_mode >> GPIO_BOUT_SHIFT) & 3) << (pin * 2); + } else { + tmp = OCR2(port); + tmp &= ~( 3<<((pin-16)*2)); + tmp |= (ocr << ((pin-16)*2)); + OCR2(port) = tmp; + + ICONFA2(port) &= ~( 3<<((pin-16)*2)); + ICONFA2(port) |= ((gpio_mode >> GPIO_AOUT_SHIFT) & 3) << ((pin-16) * 2); + ICONFB2(port) &= ~( 3<<((pin-16)*2)); + ICONFB2(port) |= ((gpio_mode >> GPIO_BOUT_SHIFT) & 3) << ((pin-16) * 2); + } +} + +EXPORT_SYMBOL(imx_gpio_mode); + +int imx_gpio_request(unsigned gpio, const char *label) +{ + if(gpio >= (GPIO_PORT_MAX + 1) * 32) { + printk(KERN_ERR "imx_gpio: Attempt to request nonexistent GPIO %d for \"%s\"\n", + gpio, label ? label : "?"); + return -EINVAL; + } + + if(test_and_set_bit(gpio, imx_gpio_alloc_map)) { + printk(KERN_ERR "imx_gpio: GPIO %d already used. Allocation for \"%s\" failed\n", + gpio, label ? label : "?"); + return -EBUSY; + } + + return 0; +} + +EXPORT_SYMBOL(imx_gpio_request); + +void imx_gpio_free(unsigned gpio) +{ + if(gpio >= (GPIO_PORT_MAX + 1) * 32) + return; + + clear_bit(gpio, imx_gpio_alloc_map); +} + +EXPORT_SYMBOL(imx_gpio_free); + +int imx_gpio_direction_input(unsigned gpio) +{ + imx_gpio_mode(gpio | GPIO_IN | GPIO_GIUS | GPIO_DR); + return 0; +} + +EXPORT_SYMBOL(imx_gpio_direction_input); + +int imx_gpio_direction_output(unsigned gpio, int value) +{ + imx_gpio_set_value(gpio, value); + imx_gpio_mode(gpio | GPIO_OUT | GPIO_GIUS | GPIO_DR); + return 0; +} + +EXPORT_SYMBOL(imx_gpio_direction_output); + +int imx_gpio_setup_multiple_pins(const int *pin_list, unsigned count, + int alloc_mode, const char *label) +{ + const int *p = pin_list; + int i; + unsigned gpio; + unsigned mode; + + for (i = 0; i < count; i++) { + gpio = *p & (GPIO_PIN_MASK | GPIO_PORT_MASK); + mode = *p & ~(GPIO_PIN_MASK | GPIO_PORT_MASK); + + if (gpio >= (GPIO_PORT_MAX + 1) * 32) + goto setup_error; + + if (alloc_mode & IMX_GPIO_ALLOC_MODE_RELEASE) + imx_gpio_free(gpio); + else if (!(alloc_mode & IMX_GPIO_ALLOC_MODE_NO_ALLOC)) + if (imx_gpio_request(gpio, label)) + if (!(alloc_mode & IMX_GPIO_ALLOC_MODE_TRY_ALLOC)) + goto setup_error; + + if (!(alloc_mode & (IMX_GPIO_ALLOC_MODE_ALLOC_ONLY | + IMX_GPIO_ALLOC_MODE_RELEASE))) + imx_gpio_mode(gpio | mode); + + p++; + } + return 0; + +setup_error: + if(alloc_mode & (IMX_GPIO_ALLOC_MODE_NO_ALLOC | + IMX_GPIO_ALLOC_MODE_TRY_ALLOC)) + return -EINVAL; + + while (p != pin_list) { + p--; + gpio = *p & (GPIO_PIN_MASK | GPIO_PORT_MASK); + imx_gpio_free(gpio); + } + + return -EINVAL; +} + +EXPORT_SYMBOL(imx_gpio_setup_multiple_pins); + +void __imx_gpio_set_value(unsigned gpio, int value) +{ + imx_gpio_set_value_inline(gpio, value); +} + +EXPORT_SYMBOL(__imx_gpio_set_value); + +int imx_gpio_to_irq(unsigned gpio) +{ + return IRQ_GPIOA(0) + gpio; +} + +EXPORT_SYMBOL(imx_gpio_to_irq); + +int imx_irq_to_gpio(unsigned irq) +{ + if (irq < IRQ_GPIOA(0)) + return -EINVAL; + return irq - IRQ_GPIOA(0); +} + +EXPORT_SYMBOL(imx_irq_to_gpio); + +static struct resource imx_mmc_resources[] = { + [0] = { + .start = 0x00214000, + .end = 0x002140FF, + .flags = IORESOURCE_MEM, + }, + [1] = { + .start = (SDHC_INT), + .end = (SDHC_INT), + .flags = IORESOURCE_IRQ, + }, +}; + +static u64 imxmmmc_dmamask = 0xffffffffUL; + +static struct platform_device imx_mmc_device = { + .name = "imx-mmc", + .id = 0, + .dev = { + .dma_mask = &imxmmmc_dmamask, + .coherent_dma_mask = 0xffffffff, + }, + .num_resources = ARRAY_SIZE(imx_mmc_resources), + .resource = imx_mmc_resources, +}; + +void __init imx_set_mmc_info(struct imxmmc_platform_data *info) +{ + imx_mmc_device.dev.platform_data = info; +} + +static struct imxfb_mach_info imx_fb_info; + +void __init set_imx_fb_info(struct imxfb_mach_info *hard_imx_fb_info) +{ + memcpy(&imx_fb_info,hard_imx_fb_info,sizeof(struct imxfb_mach_info)); +} + +static struct resource imxfb_resources[] = { + [0] = { + .start = 0x00205000, + .end = 0x002050FF, + .flags = IORESOURCE_MEM, + }, + [1] = { + .start = LCDC_INT, + .end = LCDC_INT, + .flags = IORESOURCE_IRQ, + }, +}; + +static u64 fb_dma_mask = ~(u64)0; + +static struct platform_device imxfb_device = { + .name = "imx-fb", + .id = 0, + .dev = { + .platform_data = &imx_fb_info, + .dma_mask = &fb_dma_mask, + .coherent_dma_mask = 0xffffffff, + }, + .num_resources = ARRAY_SIZE(imxfb_resources), + .resource = imxfb_resources, +}; + +static struct platform_device *devices[] __initdata = { + &imx_mmc_device, + &imxfb_device, +}; + +static struct map_desc imx_io_desc[] __initdata = { + { + .virtual = IMX_IO_BASE, + .pfn = __phys_to_pfn(IMX_IO_PHYS), + .length = IMX_IO_SIZE, + .type = MT_DEVICE + } +}; + +void __init +imx_map_io(void) +{ + iotable_init(imx_io_desc, ARRAY_SIZE(imx_io_desc)); +} + +static int __init imx_init(void) +{ + return platform_add_devices(devices, ARRAY_SIZE(devices)); +} + +subsys_initcall(imx_init); |
