arch/m68k/include/asm/mcfgpio.h - arm/linux - Git at Google

 /*
  * Coldfire generic GPIO support.
  *
  * (C) Copyright 2009, Steven King <sfking@fdwdc.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 of the License.
  *
  * 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.
  */

 #ifndef mcfgpio_h
 #define mcfgpio_h

 #ifdef CONFIG_GPIOLIB
 #include <asm-generic/gpio.h>
 #else

 int __mcfgpio_get_value(unsigned gpio);
 void __mcfgpio_set_value(unsigned gpio, int value);
 int __mcfgpio_direction_input(unsigned gpio);
 int __mcfgpio_direction_output(unsigned gpio, int value);
 int __mcfgpio_request(unsigned gpio);
 void __mcfgpio_free(unsigned gpio);

 /* our alternate 'gpiolib' functions */
 static inline int __gpio_get_value(unsigned gpio)
 {
 	if (gpio < MCFGPIO_PIN_MAX)
 		return __mcfgpio_get_value(gpio);
 	else
 		return -EINVAL;
 }

 static inline void __gpio_set_value(unsigned gpio, int value)
 {
 	if (gpio < MCFGPIO_PIN_MAX)
 		__mcfgpio_set_value(gpio, value);
 }

 static inline int __gpio_cansleep(unsigned gpio)
 {
 	if (gpio < MCFGPIO_PIN_MAX)
 		return 0;
 	else
 		return -EINVAL;
 }

 static inline int __gpio_to_irq(unsigned gpio)
 {
 	return -EINVAL;
 }

 static inline int gpio_direction_input(unsigned gpio)
 {
 	if (gpio < MCFGPIO_PIN_MAX)
 		return __mcfgpio_direction_input(gpio);
 	else
 		return -EINVAL;
 }

 static inline int gpio_direction_output(unsigned gpio, int value)
 {
 	if (gpio < MCFGPIO_PIN_MAX)
 		return __mcfgpio_direction_output(gpio, value);
 	else
 		return -EINVAL;
 }

 static inline int gpio_request(unsigned gpio, const char *label)
 {
 	if (gpio < MCFGPIO_PIN_MAX)
 		return __mcfgpio_request(gpio);
 	else
 		return -EINVAL;
 }

 static inline void gpio_free(unsigned gpio)
 {
 	if (gpio < MCFGPIO_PIN_MAX)
 		__mcfgpio_free(gpio);
 }

 #endif /* CONFIG_GPIOLIB */


 /*
  * The Freescale Coldfire family is quite varied in how they implement GPIO.
  * Some parts have 8 bit ports, some have 16bit and some have 32bit; some have
  * only one port, others have multiple ports; some have a single data latch
  * for both input and output, others have a separate pin data register to read
  * input; some require a read-modify-write access to change an output, others
  * have set and clear registers for some of the outputs; Some have all the
  * GPIOs in a single control area, others have some GPIOs implemented in
  * different modules.
  *
  * This implementation attempts accommodate the differences while presenting
  * a generic interface that will optimize to as few instructions as possible.
  */
 #if defined(CONFIG_M5206) || defined(CONFIG_M5206e) || \
     defined(CONFIG_M520x) || defined(CONFIG_M523x) || \
     defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
     defined(CONFIG_M53xx) || defined(CONFIG_M54xx) || \
     defined(CONFIG_M5441x)

 /* These parts have GPIO organized by 8 bit ports */

 #define MCFGPIO_PORTTYPE		u8
 #define MCFGPIO_PORTSIZE		8
 #define mcfgpio_read(port)		__raw_readb(port)
 #define mcfgpio_write(data, port)	__raw_writeb(data, port)

 #elif defined(CONFIG_M5307) || defined(CONFIG_M5407) || defined(CONFIG_M5272)

 /* These parts have GPIO organized by 16 bit ports */

 #define MCFGPIO_PORTTYPE		u16
 #define MCFGPIO_PORTSIZE		16
 #define mcfgpio_read(port)		__raw_readw(port)
 #define mcfgpio_write(data, port)	__raw_writew(data, port)

 #elif defined(CONFIG_M5249) || defined(CONFIG_M525x)

 /* These parts have GPIO organized by 32 bit ports */

 #define MCFGPIO_PORTTYPE		u32
 #define MCFGPIO_PORTSIZE		32
 #define mcfgpio_read(port)		__raw_readl(port)
 #define mcfgpio_write(data, port)	__raw_writel(data, port)

 #endif

 #define mcfgpio_bit(gpio)		(1 << ((gpio) %  MCFGPIO_PORTSIZE))
 #define mcfgpio_port(gpio)		((gpio) / MCFGPIO_PORTSIZE)

 #if defined(CONFIG_M520x) || defined(CONFIG_M523x) || \
     defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
     defined(CONFIG_M53xx) || defined(CONFIG_M54xx) || \
     defined(CONFIG_M5441x)
 /*
  * These parts have an 'Edge' Port module (external interrupt/GPIO) which uses
  * read-modify-write to change an output and a GPIO module which has separate
  * set/clr registers to directly change outputs with a single write access.
  */
 #if defined(CONFIG_M528x)
 /*
  * The 528x also has GPIOs in other modules (GPT, QADC) which use
  * read-modify-write as well as those controlled by the EPORT and GPIO modules.
  */
 #define MCFGPIO_SCR_START		40
 #elif defined(CONFIGM5441x)
 /* The m5441x EPORT doesn't have its own GPIO port, uses PORT C */
 #define MCFGPIO_SCR_START		0
 #else
 #define MCFGPIO_SCR_START		8
 #endif

 #define MCFGPIO_SETR_PORT(gpio)		(MCFGPIO_SETR + \
 					mcfgpio_port(gpio - MCFGPIO_SCR_START))

 #define MCFGPIO_CLRR_PORT(gpio)		(MCFGPIO_CLRR + \
 					mcfgpio_port(gpio - MCFGPIO_SCR_START))
 #else

 #define MCFGPIO_SCR_START		MCFGPIO_PIN_MAX
 /* with MCFGPIO_SCR == MCFGPIO_PIN_MAX, these will be optimized away */
 #define MCFGPIO_SETR_PORT(gpio)		0
 #define MCFGPIO_CLRR_PORT(gpio)		0

 #endif
 /*
  * Coldfire specific helper functions
  */

 /* return the port pin data register for a gpio */
 static inline u32 __mcfgpio_ppdr(unsigned gpio)
 {
 #if defined(CONFIG_M5206) || defined(CONFIG_M5206e) || \
     defined(CONFIG_M5307) || defined(CONFIG_M5407)
 	return MCFSIM_PADAT;
 #elif defined(CONFIG_M5272)
 	if (gpio < 16)
 		return MCFSIM_PADAT;
 	else if (gpio < 32)
 		return MCFSIM_PBDAT;
 	else
 		return MCFSIM_PCDAT;
 #elif defined(CONFIG_M5249) || defined(CONFIG_M525x)
 	if (gpio < 32)
 		return MCFSIM2_GPIOREAD;
 	else
 		return MCFSIM2_GPIO1READ;
 #elif defined(CONFIG_M520x) || defined(CONFIG_M523x) || \
       defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
       defined(CONFIG_M53xx) || defined(CONFIG_M54xx) || \
       defined(CONFIG_M5441x)
 #if !defined(CONFIG_M5441x)
 	if (gpio < 8)
 		return MCFEPORT_EPPDR;
 #if defined(CONFIG_M528x)
 	else if (gpio < 16)
 		return MCFGPTA_GPTPORT;
 	else if (gpio < 24)
 		return MCFGPTB_GPTPORT;
 	else if (gpio < 32)
 		return MCFQADC_PORTQA;
 	else if (gpio < 40)
 		return MCFQADC_PORTQB;
 #endif /* defined(CONFIG_M528x) */
 	else
 #endif /* !defined(CONFIG_M5441x) */
 		return MCFGPIO_PPDR + mcfgpio_port(gpio - MCFGPIO_SCR_START);
 #else
 	return 0;
 #endif
 }

 /* return the port output data register for a gpio */
 static inline u32 __mcfgpio_podr(unsigned gpio)
 {
 #if defined(CONFIG_M5206) || defined(CONFIG_M5206e) || \
     defined(CONFIG_M5307) || defined(CONFIG_M5407)
 	return MCFSIM_PADAT;
 #elif defined(CONFIG_M5272)
 	if (gpio < 16)
 		return MCFSIM_PADAT;
 	else if (gpio < 32)
 		return MCFSIM_PBDAT;
 	else
 		return MCFSIM_PCDAT;
 #elif defined(CONFIG_M5249) || defined(CONFIG_M525x)
 	if (gpio < 32)
 		return MCFSIM2_GPIOWRITE;
 	else
 		return MCFSIM2_GPIO1WRITE;
 #elif defined(CONFIG_M520x) || defined(CONFIG_M523x) || \
       defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
       defined(CONFIG_M53xx) || defined(CONFIG_M54xx) || \
       defined(CONFIG_M5441x)
 #if !defined(CONFIG_M5441x)
 	if (gpio < 8)
 		return MCFEPORT_EPDR;
 #if defined(CONFIG_M528x)
 	else if (gpio < 16)
 		return MCFGPTA_GPTPORT;
 	else if (gpio < 24)
 		return MCFGPTB_GPTPORT;
 	else if (gpio < 32)
 		return MCFQADC_PORTQA;
 	else if (gpio < 40)
 		return MCFQADC_PORTQB;
 #endif /* defined(CONFIG_M528x) */
 	else
 #endif /* !defined(CONFIG_M5441x) */
 		return MCFGPIO_PODR + mcfgpio_port(gpio - MCFGPIO_SCR_START);
 #else
 	return 0;
 #endif
 }

 /* return the port direction data register for a gpio */
 static inline u32 __mcfgpio_pddr(unsigned gpio)
 {
 #if defined(CONFIG_M5206) || defined(CONFIG_M5206e) || \
     defined(CONFIG_M5307) || defined(CONFIG_M5407)
 	return MCFSIM_PADDR;
 #elif defined(CONFIG_M5272)
 	if (gpio < 16)
 		return MCFSIM_PADDR;
 	else if (gpio < 32)
 		return MCFSIM_PBDDR;
 	else
 		return MCFSIM_PCDDR;
 #elif defined(CONFIG_M5249) || defined(CONFIG_M525x)
 	if (gpio < 32)
 		return MCFSIM2_GPIOENABLE;
 	else
 		return MCFSIM2_GPIO1ENABLE;
 #elif defined(CONFIG_M520x) || defined(CONFIG_M523x) || \
       defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
       defined(CONFIG_M53xx) || defined(CONFIG_M54xx) || \
       defined(CONFIG_M5441x)
 #if !defined(CONFIG_M5441x)
 	if (gpio < 8)
 		return MCFEPORT_EPDDR;
 #if defined(CONFIG_M528x)
 	else if (gpio < 16)
 		return MCFGPTA_GPTDDR;
 	else if (gpio < 24)
 		return MCFGPTB_GPTDDR;
 	else if (gpio < 32)
 		return MCFQADC_DDRQA;
 	else if (gpio < 40)
 		return MCFQADC_DDRQB;
 #endif /* defined(CONFIG_M528x) */
 	else
 #endif /* !defined(CONFIG_M5441x) */
 		return MCFGPIO_PDDR + mcfgpio_port(gpio - MCFGPIO_SCR_START);
 #else
 	return 0;
 #endif
 }

 #endif /* mcfgpio_h */
	/*
	* Coldfire generic GPIO support.
	*
	* (C) Copyright 2009, Steven King <sfking@fdwdc.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 of the License.
	*
	* 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.
	*/

	#ifndef mcfgpio_h
	#define mcfgpio_h

	#ifdef CONFIG_GPIOLIB
	#include <asm-generic/gpio.h>
	#else

	int __mcfgpio_get_value(unsigned gpio);
	void __mcfgpio_set_value(unsigned gpio, int value);
	int __mcfgpio_direction_input(unsigned gpio);
	int __mcfgpio_direction_output(unsigned gpio, int value);
	int __mcfgpio_request(unsigned gpio);
	void __mcfgpio_free(unsigned gpio);

	/* our alternate 'gpiolib' functions */
	static inline int __gpio_get_value(unsigned gpio)
	{
	if (gpio < MCFGPIO_PIN_MAX)
	return __mcfgpio_get_value(gpio);
	else
	return -EINVAL;
	}

	static inline void __gpio_set_value(unsigned gpio, int value)
	{
	if (gpio < MCFGPIO_PIN_MAX)
	__mcfgpio_set_value(gpio, value);
	}

	static inline int __gpio_cansleep(unsigned gpio)
	{
	if (gpio < MCFGPIO_PIN_MAX)
	return 0;
	else
	return -EINVAL;
	}

	static inline int __gpio_to_irq(unsigned gpio)
	{
	return -EINVAL;
	}

	static inline int gpio_direction_input(unsigned gpio)
	{
	if (gpio < MCFGPIO_PIN_MAX)
	return __mcfgpio_direction_input(gpio);
	else
	return -EINVAL;
	}

	static inline int gpio_direction_output(unsigned gpio, int value)
	{
	if (gpio < MCFGPIO_PIN_MAX)
	return __mcfgpio_direction_output(gpio, value);
	else
	return -EINVAL;
	}

	static inline int gpio_request(unsigned gpio, const char *label)
	{
	if (gpio < MCFGPIO_PIN_MAX)
	return __mcfgpio_request(gpio);
	else
	return -EINVAL;
	}

	static inline void gpio_free(unsigned gpio)
	{
	if (gpio < MCFGPIO_PIN_MAX)
	__mcfgpio_free(gpio);
	}

	#endif /* CONFIG_GPIOLIB */


	/*
	* The Freescale Coldfire family is quite varied in how they implement GPIO.
	* Some parts have 8 bit ports, some have 16bit and some have 32bit; some have
	* only one port, others have multiple ports; some have a single data latch
	* for both input and output, others have a separate pin data register to read
	* input; some require a read-modify-write access to change an output, others
	* have set and clear registers for some of the outputs; Some have all the
	* GPIOs in a single control area, others have some GPIOs implemented in
	* different modules.
	*
	* This implementation attempts accommodate the differences while presenting
	* a generic interface that will optimize to as few instructions as possible.
	*/
	#if defined(CONFIG_M5206) \|\| defined(CONFIG_M5206e) \|\| \
	defined(CONFIG_M520x) \|\| defined(CONFIG_M523x) \|\| \
	defined(CONFIG_M527x) \|\| defined(CONFIG_M528x) \|\| \
	defined(CONFIG_M53xx) \|\| defined(CONFIG_M54xx) \|\| \
	defined(CONFIG_M5441x)

	/* These parts have GPIO organized by 8 bit ports */

	#define MCFGPIO_PORTTYPE u8
	#define MCFGPIO_PORTSIZE 8
	#define mcfgpio_read(port) __raw_readb(port)
	#define mcfgpio_write(data, port) __raw_writeb(data, port)

	#elif defined(CONFIG_M5307) \|\| defined(CONFIG_M5407) \|\| defined(CONFIG_M5272)

	/* These parts have GPIO organized by 16 bit ports */

	#define MCFGPIO_PORTTYPE u16
	#define MCFGPIO_PORTSIZE 16
	#define mcfgpio_read(port) __raw_readw(port)
	#define mcfgpio_write(data, port) __raw_writew(data, port)

	#elif defined(CONFIG_M5249) \|\| defined(CONFIG_M525x)

	/* These parts have GPIO organized by 32 bit ports */

	#define MCFGPIO_PORTTYPE u32
	#define MCFGPIO_PORTSIZE 32
	#define mcfgpio_read(port) __raw_readl(port)
	#define mcfgpio_write(data, port) __raw_writel(data, port)

	#endif

	#define mcfgpio_bit(gpio) (1 << ((gpio) % MCFGPIO_PORTSIZE))
	#define mcfgpio_port(gpio) ((gpio) / MCFGPIO_PORTSIZE)

	#if defined(CONFIG_M520x) \|\| defined(CONFIG_M523x) \|\| \
	defined(CONFIG_M527x) \|\| defined(CONFIG_M528x) \|\| \
	defined(CONFIG_M53xx) \|\| defined(CONFIG_M54xx) \|\| \
	defined(CONFIG_M5441x)
	/*
	* These parts have an 'Edge' Port module (external interrupt/GPIO) which uses
	* read-modify-write to change an output and a GPIO module which has separate
	* set/clr registers to directly change outputs with a single write access.
	*/
	#if defined(CONFIG_M528x)
	/*
	* The 528x also has GPIOs in other modules (GPT, QADC) which use
	* read-modify-write as well as those controlled by the EPORT and GPIO modules.
	*/
	#define MCFGPIO_SCR_START 40
	#elif defined(CONFIGM5441x)
	/* The m5441x EPORT doesn't have its own GPIO port, uses PORT C */
	#define MCFGPIO_SCR_START 0
	#else
	#define MCFGPIO_SCR_START 8
	#endif

	#define MCFGPIO_SETR_PORT(gpio) (MCFGPIO_SETR + \
	mcfgpio_port(gpio - MCFGPIO_SCR_START))

	#define MCFGPIO_CLRR_PORT(gpio) (MCFGPIO_CLRR + \
	mcfgpio_port(gpio - MCFGPIO_SCR_START))
	#else

	#define MCFGPIO_SCR_START MCFGPIO_PIN_MAX
	/* with MCFGPIO_SCR == MCFGPIO_PIN_MAX, these will be optimized away */
	#define MCFGPIO_SETR_PORT(gpio) 0
	#define MCFGPIO_CLRR_PORT(gpio) 0

	#endif
	/*
	* Coldfire specific helper functions
	*/

	/* return the port pin data register for a gpio */
	static inline u32 __mcfgpio_ppdr(unsigned gpio)
	{
	#if defined(CONFIG_M5206) \|\| defined(CONFIG_M5206e) \|\| \
	defined(CONFIG_M5307) \|\| defined(CONFIG_M5407)
	return MCFSIM_PADAT;
	#elif defined(CONFIG_M5272)
	if (gpio < 16)
	return MCFSIM_PADAT;
	else if (gpio < 32)
	return MCFSIM_PBDAT;
	else
	return MCFSIM_PCDAT;
	#elif defined(CONFIG_M5249) \|\| defined(CONFIG_M525x)
	if (gpio < 32)
	return MCFSIM2_GPIOREAD;
	else
	return MCFSIM2_GPIO1READ;
	#elif defined(CONFIG_M520x) \|\| defined(CONFIG_M523x) \|\| \
	defined(CONFIG_M527x) \|\| defined(CONFIG_M528x) \|\| \
	defined(CONFIG_M53xx) \|\| defined(CONFIG_M54xx) \|\| \
	defined(CONFIG_M5441x)
	#if !defined(CONFIG_M5441x)
	if (gpio < 8)
	return MCFEPORT_EPPDR;
	#if defined(CONFIG_M528x)
	else if (gpio < 16)
	return MCFGPTA_GPTPORT;
	else if (gpio < 24)
	return MCFGPTB_GPTPORT;
	else if (gpio < 32)
	return MCFQADC_PORTQA;
	else if (gpio < 40)
	return MCFQADC_PORTQB;
	#endif /* defined(CONFIG_M528x) */
	else
	#endif /* !defined(CONFIG_M5441x) */
	return MCFGPIO_PPDR + mcfgpio_port(gpio - MCFGPIO_SCR_START);
	#else
	return 0;
	#endif
	}

	/* return the port output data register for a gpio */
	static inline u32 __mcfgpio_podr(unsigned gpio)
	{
	#if defined(CONFIG_M5206) \|\| defined(CONFIG_M5206e) \|\| \
	defined(CONFIG_M5307) \|\| defined(CONFIG_M5407)
	return MCFSIM_PADAT;
	#elif defined(CONFIG_M5272)
	if (gpio < 16)
	return MCFSIM_PADAT;
	else if (gpio < 32)
	return MCFSIM_PBDAT;
	else
	return MCFSIM_PCDAT;
	#elif defined(CONFIG_M5249) \|\| defined(CONFIG_M525x)
	if (gpio < 32)
	return MCFSIM2_GPIOWRITE;
	else
	return MCFSIM2_GPIO1WRITE;
	#elif defined(CONFIG_M520x) \|\| defined(CONFIG_M523x) \|\| \
	defined(CONFIG_M527x) \|\| defined(CONFIG_M528x) \|\| \
	defined(CONFIG_M53xx) \|\| defined(CONFIG_M54xx) \|\| \
	defined(CONFIG_M5441x)
	#if !defined(CONFIG_M5441x)
	if (gpio < 8)
	return MCFEPORT_EPDR;
	#if defined(CONFIG_M528x)
	else if (gpio < 16)
	return MCFGPTA_GPTPORT;
	else if (gpio < 24)
	return MCFGPTB_GPTPORT;
	else if (gpio < 32)
	return MCFQADC_PORTQA;
	else if (gpio < 40)
	return MCFQADC_PORTQB;
	#endif /* defined(CONFIG_M528x) */
	else
	#endif /* !defined(CONFIG_M5441x) */
	return MCFGPIO_PODR + mcfgpio_port(gpio - MCFGPIO_SCR_START);
	#else
	return 0;
	#endif
	}

	/* return the port direction data register for a gpio */
	static inline u32 __mcfgpio_pddr(unsigned gpio)
	{
	#if defined(CONFIG_M5206) \|\| defined(CONFIG_M5206e) \|\| \
	defined(CONFIG_M5307) \|\| defined(CONFIG_M5407)
	return MCFSIM_PADDR;
	#elif defined(CONFIG_M5272)
	if (gpio < 16)
	return MCFSIM_PADDR;
	else if (gpio < 32)
	return MCFSIM_PBDDR;
	else
	return MCFSIM_PCDDR;
	#elif defined(CONFIG_M5249) \|\| defined(CONFIG_M525x)
	if (gpio < 32)
	return MCFSIM2_GPIOENABLE;
	else
	return MCFSIM2_GPIO1ENABLE;
	#elif defined(CONFIG_M520x) \|\| defined(CONFIG_M523x) \|\| \
	defined(CONFIG_M527x) \|\| defined(CONFIG_M528x) \|\| \
	defined(CONFIG_M53xx) \|\| defined(CONFIG_M54xx) \|\| \
	defined(CONFIG_M5441x)
	#if !defined(CONFIG_M5441x)
	if (gpio < 8)
	return MCFEPORT_EPDDR;
	#if defined(CONFIG_M528x)
	else if (gpio < 16)
	return MCFGPTA_GPTDDR;
	else if (gpio < 24)
	return MCFGPTB_GPTDDR;
	else if (gpio < 32)
	return MCFQADC_DDRQA;
	else if (gpio < 40)
	return MCFQADC_DDRQB;
	#endif /* defined(CONFIG_M528x) */
	else
	#endif /* !defined(CONFIG_M5441x) */
	return MCFGPIO_PDDR + mcfgpio_port(gpio - MCFGPIO_SCR_START);
	#else
	return 0;
	#endif
	}

	#endif /* mcfgpio_h */