bfin_gpio.c

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	unsigned long flags; \
	unsigned short ret; \
	local_irq_save(flags); \
	ret = (gpio_bankb[gpio_bank(gpio)]->name); \
	AWA_DUMMY_READ(name); \
	local_irq_restore(flags); \
	return ret; \
} \
EXPORT_SYMBOL(get_gpiop_ ## name);
#else
#define GET_GPIO_P(name) \
unsigned short get_gpiop_ ## name(unsigned short gpio) \
{ \
	return (gpio_bankb[gpio_bank(gpio)]->name);\
} \
EXPORT_SYMBOL(get_gpiop_ ## name);
#endif

GET_GPIO_P(data)
GET_GPIO_P(dir)
GET_GPIO_P(inen)
GET_GPIO_P(polar)
GET_GPIO_P(edge)
GET_GPIO_P(both)
GET_GPIO_P(maska)
GET_GPIO_P(maskb)


#ifdef CONFIG_PM
/***********************************************************
*
* FUNCTIONS: Blackfin PM Setup API
*
* INPUTS/OUTPUTS:
* gpio - GPIO Number between 0 and MAX_BLACKFIN_GPIOS
* type -
*	PM_WAKE_RISING
*	PM_WAKE_FALLING
*	PM_WAKE_HIGH
*	PM_WAKE_LOW
*	PM_WAKE_BOTH_EDGES
*
* DESCRIPTION: Blackfin PM Driver API
*
* CAUTION:
*************************************************************
* MODIFICATION HISTORY :
**************************************************************/
int gpio_pm_wakeup_request(unsigned short gpio, unsigned char type)
{
	unsigned long flags;

	if ((check_gpio(gpio) < 0) || !type)
		return -EINVAL;

	local_irq_save(flags);

	wakeup_map[gpio_bank(gpio)] |= gpio_bit(gpio);
	wakeup_flags_map[gpio] = type;
	local_irq_restore(flags);

	return 0;
}
EXPORT_SYMBOL(gpio_pm_wakeup_request);

void gpio_pm_wakeup_free(unsigned short gpio)
{
	unsigned long flags;

	if (check_gpio(gpio) < 0)
		return;

	local_irq_save(flags);

	wakeup_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);

	local_irq_restore(flags);
}
EXPORT_SYMBOL(gpio_pm_wakeup_free);

static int bfin_gpio_wakeup_type(unsigned short gpio, unsigned char type)
{
	port_setup(gpio, GPIO_USAGE);
	set_gpio_dir(gpio, 0);
	set_gpio_inen(gpio, 1);

	if (type & (PM_WAKE_RISING | PM_WAKE_FALLING))
		set_gpio_edge(gpio, 1);
	 else
		set_gpio_edge(gpio, 0);

	if ((type & (PM_WAKE_BOTH_EDGES)) == (PM_WAKE_BOTH_EDGES))
		set_gpio_both(gpio, 1);
	else
		set_gpio_both(gpio, 0);

	if ((type & (PM_WAKE_FALLING | PM_WAKE_LOW)))
		set_gpio_polar(gpio, 1);
	else
		set_gpio_polar(gpio, 0);

	SSYNC();

	return 0;
}

u32 gpio_pm_setup(void)
{
	u32 sic_iwr = 0;
	u16 bank, mask, i, gpio;

	for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
		mask = wakeup_map[gpio_bank(i)];
		bank = gpio_bank(i);

		gpio_bank_saved[bank].maskb = gpio_bankb[bank]->maskb;
		gpio_bankb[bank]->maskb = 0;

		if (mask) {
#ifdef BF537_FAMILY
			gpio_bank_saved[bank].fer   = *port_fer[bank];
#endif
			gpio_bank_saved[bank].inen  = gpio_bankb[bank]->inen;
			gpio_bank_saved[bank].polar = gpio_bankb[bank]->polar;
			gpio_bank_saved[bank].dir   = gpio_bankb[bank]->dir;
			gpio_bank_saved[bank].edge  = gpio_bankb[bank]->edge;
			gpio_bank_saved[bank].both  = gpio_bankb[bank]->both;
			gpio_bank_saved[bank].reserved =
						reserved_gpio_map[bank];

			gpio = i;

			while (mask) {
				if (mask & 1) {
					reserved_gpio_map[gpio_bank(gpio)] |=
							gpio_bit(gpio);
					bfin_gpio_wakeup_type(gpio,
						wakeup_flags_map[gpio]);
					set_gpio_data(gpio, 0); /*Clear*/
				}
				gpio++;
				mask >>= 1;
			}

			sic_iwr |= 1 <<
				(sic_iwr_irqs[bank] - (IRQ_CORETMR + 1));
			gpio_bankb[bank]->maskb_set = wakeup_map[gpio_bank(i)];
		}
	}

	AWA_DUMMY_READ(maskb_set);

	if (sic_iwr)
		return sic_iwr;
	else
		return IWR_ENABLE_ALL;
}

void gpio_pm_restore(void)
{
	u16 bank, mask, i;

	for (i = 0; i < MAX_BLACKFIN_GPIOS; i += GPIO_BANKSIZE) {
		mask = wakeup_map[gpio_bank(i)];
		bank = gpio_bank(i);

		if (mask) {
#ifdef BF537_FAMILY
			*port_fer[bank]   	= gpio_bank_saved[bank].fer;
#endif
			gpio_bankb[bank]->inen  = gpio_bank_saved[bank].inen;
			gpio_bankb[bank]->dir   = gpio_bank_saved[bank].dir;
			gpio_bankb[bank]->polar = gpio_bank_saved[bank].polar;
			gpio_bankb[bank]->edge  = gpio_bank_saved[bank].edge;
			gpio_bankb[bank]->both  = gpio_bank_saved[bank].both;

			reserved_gpio_map[bank] =
					gpio_bank_saved[bank].reserved;

		}

		gpio_bankb[bank]->maskb = gpio_bank_saved[bank].maskb;
	}
	AWA_DUMMY_READ(maskb);
}

#endif
#endif /* BF548_FAMILY */

/***********************************************************
*
* FUNCTIONS: 	Blackfin Peripheral Resource Allocation
*		and PortMux Setup
*
* INPUTS/OUTPUTS:
* per	Peripheral Identifier
* label	String
*
* DESCRIPTION: Blackfin Peripheral Resource Allocation and Setup API
*
* CAUTION:
*************************************************************
* MODIFICATION HISTORY :
**************************************************************/

#ifdef BF548_FAMILY
int peripheral_request(unsigned short per, const char *label)
{
	unsigned long flags;
	unsigned short ident = P_IDENT(per);

	/*
	 * Don't cares are pins with only one dedicated function
	 */

	if (per & P_DONTCARE)
		return 0;

	if (!(per & P_DEFINED))
		return -ENODEV;

	if (check_gpio(ident) < 0)
		return -EINVAL;

	local_irq_save(flags);

	if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) {
		printk(KERN_ERR
		    "%s: Peripheral %d is already reserved as GPIO by %s !\n",
		       __FUNCTION__, ident, get_label(ident));
		dump_stack();
		local_irq_restore(flags);
		return -EBUSY;
	}

	if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) {

		u16 funct = get_portmux(ident);

	/*
	 * Pin functions like AMC address strobes my
	 * be requested and used by several drivers
	 */

		if (!((per & P_MAYSHARE) && (funct == P_FUNCT2MUX(per)))) {

		/*
		 * Allow that the identical pin function can
		 * be requested from the same driver twice
		 */

		if (cmp_label(ident, label) == 0)
			goto anyway;

			printk(KERN_ERR
			       "%s: Peripheral %d function %d is already reserved by %s !\n",
			       __FUNCTION__, ident, P_FUNCT2MUX(per), get_label(ident));
			dump_stack();
			local_irq_restore(flags);
			return -EBUSY;
		}
	}

anyway:
	reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident);

	portmux_setup(ident, P_FUNCT2MUX(per));
	port_setup(ident, PERIPHERAL_USAGE);

	local_irq_restore(flags);
	set_label(ident, label);

	return 0;
}
EXPORT_SYMBOL(peripheral_request);
#else

int peripheral_request(unsigned short per, const char *label)
{
	unsigned long flags;
	unsigned short ident = P_IDENT(per);

	/*
	 * Don't cares are pins with only one dedicated function
	 */

	if (per & P_DONTCARE)
		return 0;

	if (!(per & P_DEFINED))
		return -ENODEV;

	local_irq_save(flags);

	if (!check_gpio(ident)) {

	if (unlikely(reserved_gpio_map[gpio_bank(ident)] & gpio_bit(ident))) {
		printk(KERN_ERR
		       "%s: Peripheral %d is already reserved as GPIO by %s !\n",
		       __FUNCTION__, ident, get_label(ident));
		dump_stack();
		local_irq_restore(flags);
		return -EBUSY;
	}

	}

	if (unlikely(reserved_peri_map[gpio_bank(ident)] & gpio_bit(ident))) {

	/*
	 * Pin functions like AMC address strobes my
	 * be requested and used by several drivers
	 */

	if (!(per & P_MAYSHARE)) {

	/*
	 * Allow that the identical pin function can
	 * be requested from the same driver twice
	 */

		if (cmp_label(ident, label) == 0)
			goto anyway;

			printk(KERN_ERR
			       "%s: Peripheral %d function %d is already"
			       " reserved by %s !\n",
			       __FUNCTION__, ident, P_FUNCT2MUX(per),
				get_label(ident));
			dump_stack();
			local_irq_restore(flags);
			return -EBUSY;
		}

	}

anyway:
	portmux_setup(per, P_FUNCT2MUX(per));

	port_setup(ident, PERIPHERAL_USAGE);

	reserved_peri_map[gpio_bank(ident)] |= gpio_bit(ident);
	local_irq_restore(flags);
	set_label(ident, label);

	return 0;
}
EXPORT_SYMBOL(peripheral_request);
#endif

int peripheral_request_list(unsigned short per[], const char *label)
{
	u16 cnt;
	int ret;

	for (cnt = 0; per[cnt] != 0; cnt++) {

		ret = peripheral_request(per[cnt], label);

		if (ret < 0) {
			for ( ; cnt > 0; cnt--) {
				peripheral_free(per[cnt - 1]);
			}
		return ret;
		}
	}

	return 0;
}
EXPORT_SYMBOL(peripheral_request_list);

void peripheral_free(unsigned short per)
{
	unsigned long flags;
	unsigned short ident = P_IDENT(per);

	if (per & P_DONTCARE)
		return;

	if (!(per & P_DEFINED))
		return;

	if (check_gpio(ident) < 0)
		return;

	local_irq_save(flags);

	if (unlikely(!(reserved_peri_map[gpio_bank(ident)]
			 & gpio_bit(ident)))) {
		local_irq_restore(flags);
		return;
	}

	if (!(per & P_MAYSHARE)) {
		port_setup(ident, GPIO_USAGE);
	}

	reserved_peri_map[gpio_bank(ident)] &= ~gpio_bit(ident);

	set_label(ident, "free");

	local_irq_restore(flags);
}
EXPORT_SYMBOL(peripheral_free);

void peripheral_free_list(unsigned short per[])
{
	u16 cnt;

	for (cnt = 0; per[cnt] != 0; cnt++) {
		peripheral_free(per[cnt]);
	}

}
EXPORT_SYMBOL(peripheral_free_list);

/***********************************************************
*
* FUNCTIONS: Blackfin GPIO Driver
*
* INPUTS/OUTPUTS:
* gpio	PIO Number between 0 and MAX_BLACKFIN_GPIOS
* label	String
*
* DESCRIPTION: Blackfin GPIO Driver API
*
* CAUTION:
*************************************************************
* MODIFICATION HISTORY :
**************************************************************/

int gpio_request(unsigned short gpio, const char *label)
{
	unsigned long flags;

	if (check_gpio(gpio) < 0)
		return -EINVAL;

	local_irq_save(flags);

	/*
	 * Allow that the identical GPIO can
	 * be requested from the same driver twice
	 * Do nothing and return -
	 */

	if (cmp_label(gpio, label) == 0) {
		local_irq_restore(flags);
		return 0;
	}

	if (unlikely(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
		printk(KERN_ERR "bfin-gpio: GPIO %d is already reserved by %s !\n",
			 gpio, get_label(gpio));
		dump_stack();
		local_irq_restore(flags);
		return -EBUSY;
	}
	if (unlikely(reserved_peri_map[gpio_bank(gpio)] & gpio_bit(gpio))) {
		printk(KERN_ERR
		       "bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n",
		       gpio, get_label(gpio));
		dump_stack();
		local_irq_restore(flags);
		return -EBUSY;
	}

	reserved_gpio_map[gpio_bank(gpio)] |= gpio_bit(gpio);

	local_irq_restore(flags);

	port_setup(gpio, GPIO_USAGE);
	set_label(gpio, label);

	return 0;
}
EXPORT_SYMBOL(gpio_request);

void gpio_free(unsigned short gpio)
{
	unsigned long flags;

	if (check_gpio(gpio) < 0)
		return;

	local_irq_save(flags);

	if (unlikely(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)))) {
		printk(KERN_ERR "bfin-gpio: GPIO %d wasn't reserved!\n", gpio);
		dump_stack();
		local_irq_restore(flags);
		return;
	}

	default_gpio(gpio);

	reserved_gpio_map[gpio_bank(gpio)] &= ~gpio_bit(gpio);

	set_label(gpio, "free");

	local_irq_restore(flags);
}
EXPORT_SYMBOL(gpio_free);

#ifdef BF548_FAMILY
void gpio_direction_input(unsigned short gpio)
{
	unsigned long flags;

	BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)));

	local_irq_save(flags);
	gpio_array[gpio_bank(gpio)]->port_dir_clear = gpio_bit(gpio);
	gpio_array[gpio_bank(gpio)]->port_inen |= gpio_bit(gpio);
	local_irq_restore(flags);
}
EXPORT_SYMBOL(gpio_direction_input);

void gpio_direction_output(unsigned short gpio)
{
	unsigned long flags;

	BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)));

	local_irq_save(flags);
	gpio_array[gpio_bank(gpio)]->port_inen &= ~gpio_bit(gpio);
	gpio_array[gpio_bank(gpio)]->port_dir_set = gpio_bit(gpio);
	local_irq_restore(flags);
}
EXPORT_SYMBOL(gpio_direction_output);

void gpio_set_value(unsigned short gpio, unsigned short arg)
{
	if (arg)
		gpio_array[gpio_bank(gpio)]->port_set = gpio_bit(gpio);
	else
		gpio_array[gpio_bank(gpio)]->port_clear = gpio_bit(gpio);

}
EXPORT_SYMBOL(gpio_set_value);

unsigned short gpio_get_value(unsigned short gpio)
{
	return (1 & (gpio_array[gpio_bank(gpio)]->port_data >> gpio_sub_n(gpio)));
}
EXPORT_SYMBOL(gpio_get_value);

#else

void gpio_direction_input(unsigned short gpio)
{
	unsigned long flags;

	BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)));

	local_irq_save(flags);
	gpio_bankb[gpio_bank(gpio)]->dir &= ~gpio_bit(gpio);
	gpio_bankb[gpio_bank(gpio)]->inen |= gpio_bit(gpio);
	AWA_DUMMY_READ(inen);
	local_irq_restore(flags);
}
EXPORT_SYMBOL(gpio_direction_input);

void gpio_direction_output(unsigned short gpio)
{
	unsigned long flags;

	BUG_ON(!(reserved_gpio_map[gpio_bank(gpio)] & gpio_bit(gpio)));

	local_irq_save(flags);
	gpio_bankb[gpio_bank(gpio)]->inen &= ~gpio_bit(gpio);
	gpio_bankb[gpio_bank(gpio)]->dir |= gpio_bit(gpio);
	AWA_DUMMY_READ(dir);
	local_irq_restore(flags);
}
EXPORT_SYMBOL(gpio_direction_output);

/* If we are booting from SPI and our board lacks a strong enough pull up,
 * the core can reset and execute the bootrom faster than the resistor can
 * pull the signal logically high.  To work around this (common) error in
 * board design, we explicitly set the pin back to GPIO mode, force /CS
 * high, and wait for the electrons to do their thing.
 *
 * This function only makes sense to be called from reset code, but it
 * lives here as we need to force all the GPIO states w/out going through
 * BUG() checks and such.
 */
void bfin_gpio_reset_spi0_ssel1(void)
{
	u16 gpio = P_IDENT(P_SPI0_SSEL1);

	port_setup(gpio, GPIO_USAGE);
	gpio_bankb[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
	udelay(1);
}

#endif /*BF548_FAMILY */