arch/arm/mach-imx/generic.c - linux - Git at Google

 /*
  *  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 <asm/arch/imxfb.h>
 #include <asm/hardware.h>
 #include <asm/arch/imx-regs.h>

 #include <asm/mach/map.h>
 #include <asm/arch/mmc.h>
 #include <asm/arch/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));
 }
 EXPORT_SYMBOL(set_imx_fb_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);
	/*
	* 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 <asm/arch/imxfb.h>
	#include <asm/hardware.h>
	#include <asm/arch/imx-regs.h>

	#include <asm/mach/map.h>
	#include <asm/arch/mmc.h>
	#include <asm/arch/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));
	}
	EXPORT_SYMBOL(set_imx_fb_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);