[deliverable/linux.git] / arch / arm / mach-pxa / mfp-pxa2xx.c

/*
 *  linux/arch/arm/mach-pxa/mfp-pxa2xx.c
 *
 *  PXA2xx pin mux configuration support
 *
 *  The GPIOs on PXA2xx can be configured as one of many alternate
 *  functions, this is by concept samilar to the MFP configuration
 *  on PXA3xx,  what's more important, the low power pin state and
 *  wakeup detection are also supported by the same framework.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/sysdev.h>

#include <mach/gpio.h>
#include <mach/pxa2xx-regs.h>
#include <mach/mfp-pxa2xx.h>

#include "generic.h"

#define PGSR(x)		__REG2(0x40F00020, (x) << 2)
#define __GAFR(u, x)	__REG2((u) ? 0x40E00058 : 0x40E00054, (x) << 3)
#define GAFR_L(x)	__GAFR(0, x)
#define GAFR_U(x)	__GAFR(1, x)

#define PWER_WE35	(1 << 24)

struct gpio_desc {
	unsigned	valid		: 1;
	unsigned	can_wakeup	: 1;
	unsigned	keypad_gpio	: 1;
	unsigned	dir_inverted	: 1;
	unsigned int	mask; /* bit mask in PWER or PKWR */
	unsigned int	mux_mask; /* bit mask of muxed gpio bits, 0 if no mux */
	unsigned long	config;
};

static struct gpio_desc gpio_desc[MFP_PIN_GPIO127 + 1];

static unsigned long gpdr_lpm[4];

static int __mfp_config_gpio(unsigned gpio, unsigned long c)
{
	unsigned long gafr, mask = GPIO_bit(gpio);
	int bank = gpio_to_bank(gpio);
	int uorl = !!(gpio & 0x10); /* GAFRx_U or GAFRx_L ? */
	int shft = (gpio & 0xf) << 1;
	int fn = MFP_AF(c);
	int is_out = (c & MFP_DIR_OUT) ? 1 : 0;

	if (fn > 3)
		return -EINVAL;

	/* alternate function and direction at run-time */
	gafr = (uorl == 0) ? GAFR_L(bank) : GAFR_U(bank);
	gafr = (gafr & ~(0x3 << shft)) | (fn << shft);

	if (uorl == 0)
		GAFR_L(bank) = gafr;
	else
		GAFR_U(bank) = gafr;

	if (is_out ^ gpio_desc[gpio].dir_inverted)
		GPDR(gpio) |= mask;
	else
		GPDR(gpio) &= ~mask;

	/* alternate function and direction at low power mode */
	switch (c & MFP_LPM_STATE_MASK) {
	case MFP_LPM_DRIVE_HIGH:
		PGSR(bank) |= mask;
		is_out = 1;
		break;
	case MFP_LPM_DRIVE_LOW:
		PGSR(bank) &= ~mask;
		is_out = 1;
		break;
	case MFP_LPM_DEFAULT:
		break;
	default:
		/* warning and fall through, treat as MFP_LPM_DEFAULT */
		pr_warning("%s: GPIO%d: unsupported low power mode\n",
				__func__, gpio);
		break;
	}

	if (is_out ^ gpio_desc[gpio].dir_inverted)
		gpdr_lpm[bank] |= mask;
	else
		gpdr_lpm[bank] &= ~mask;

	/* give early warning if MFP_LPM_CAN_WAKEUP is set on the
	 * configurations of those pins not able to wakeup
	 */
	if ((c & MFP_LPM_CAN_WAKEUP) && !gpio_desc[gpio].can_wakeup) {
		pr_warning("%s: GPIO%d unable to wakeup\n",
				__func__, gpio);
		return -EINVAL;
	}

	if ((c & MFP_LPM_CAN_WAKEUP) && is_out) {
		pr_warning("%s: output GPIO%d unable to wakeup\n",
				__func__, gpio);
		return -EINVAL;
	}

	return 0;
}

static inline int __mfp_validate(int mfp)
{
	int gpio = mfp_to_gpio(mfp);

	if ((mfp > MFP_PIN_GPIO127) || !gpio_desc[gpio].valid) {
		pr_warning("%s: GPIO%d is invalid pin\n", __func__, gpio);
		return -1;
	}

	return gpio;
}

void pxa2xx_mfp_config(unsigned long *mfp_cfgs, int num)
{
	unsigned long flags;
	unsigned long *c;
	int i, gpio;

	for (i = 0, c = mfp_cfgs; i < num; i++, c++) {

		gpio = __mfp_validate(MFP_PIN(*c));
		if (gpio < 0)
			continue;

		local_irq_save(flags);

		gpio_desc[gpio].config = *c;
		__mfp_config_gpio(gpio, *c);

		local_irq_restore(flags);
	}
}

void pxa2xx_mfp_set_lpm(int mfp, unsigned long lpm)
{
	unsigned long flags, c;
	int gpio;

	gpio = __mfp_validate(mfp);
	if (gpio < 0)
		return;

	local_irq_save(flags);

	c = gpio_desc[gpio].config;
	c = (c & ~MFP_LPM_STATE_MASK) | lpm;
	__mfp_config_gpio(gpio, c);

	local_irq_restore(flags);
}

int gpio_set_wake(unsigned int gpio, unsigned int on)
{
	struct gpio_desc *d;
	unsigned long c, mux_taken;

	if (gpio > mfp_to_gpio(MFP_PIN_GPIO127))
		return -EINVAL;

	d = &gpio_desc[gpio];
	c = d->config;

	if (!d->valid)
		return -EINVAL;

	if (d->keypad_gpio)
		return -EINVAL;

	mux_taken = (PWER & d->mux_mask) & (~d->mask);
	if (on && mux_taken)
		return -EBUSY;

	if (d->can_wakeup && (c & MFP_LPM_CAN_WAKEUP)) {
		if (on) {
			PWER = (PWER & ~d->mux_mask) | d->mask;

			if (c & MFP_LPM_EDGE_RISE)
				PRER |= d->mask;
			else
				PRER &= ~d->mask;

			if (c & MFP_LPM_EDGE_FALL)
				PFER |= d->mask;
			else
				PFER &= ~d->mask;
		} else {
			PWER &= ~d->mask;
			PRER &= ~d->mask;
			PFER &= ~d->mask;
		}
	}
	return 0;
}

#ifdef CONFIG_PXA25x
static void __init pxa25x_mfp_init(void)
{
	int i;

	for (i = 0; i <= pxa_last_gpio; i++)
		gpio_desc[i].valid = 1;

	for (i = 0; i <= 15; i++) {
		gpio_desc[i].can_wakeup = 1;
		gpio_desc[i].mask = GPIO_bit(i);
	}

	/* PXA26x has additional 4 GPIOs (86/87/88/89) which has the
	 * direction bit inverted in GPDR2. See PXA26x DM 4.1.1.
	 */
	for (i = 86; i <= pxa_last_gpio; i++)
		gpio_desc[i].dir_inverted = 1;
}
#else
static inline void pxa25x_mfp_init(void) {}
#endif /* CONFIG_PXA25x */

#ifdef CONFIG_PXA27x
static int pxa27x_pkwr_gpio[] = {
	13, 16, 17, 34, 36, 37, 38, 39, 90, 91, 93, 94,
	95, 96, 97, 98, 99, 100, 101, 102
};

int keypad_set_wake(unsigned int on)
{
	unsigned int i, gpio, mask = 0;

	if (!on) {
		PKWR = 0;
		return 0;
	}

	for (i = 0; i < ARRAY_SIZE(pxa27x_pkwr_gpio); i++) {

		gpio = pxa27x_pkwr_gpio[i];

		if (gpio_desc[gpio].config & MFP_LPM_CAN_WAKEUP)
			mask |= gpio_desc[gpio].mask;
	}

	PKWR = mask;
	return 0;
}

#define PWER_WEMUX2_GPIO38	(1 << 16)
#define PWER_WEMUX2_GPIO53	(2 << 16)
#define PWER_WEMUX2_GPIO40	(3 << 16)
#define PWER_WEMUX2_GPIO36	(4 << 16)
#define PWER_WEMUX2_MASK	(7 << 16)
#define PWER_WEMUX3_GPIO31	(1 << 19)
#define PWER_WEMUX3_GPIO113	(2 << 19)
#define PWER_WEMUX3_MASK	(3 << 19)

#define INIT_GPIO_DESC_MUXED(mux, gpio)				\
do {								\
	gpio_desc[(gpio)].can_wakeup = 1;			\
	gpio_desc[(gpio)].mask = PWER_ ## mux ## _GPIO ##gpio;	\
	gpio_desc[(gpio)].mux_mask = PWER_ ## mux ## _MASK;	\
} while (0)

static void __init pxa27x_mfp_init(void)
{
	int i, gpio;

	for (i = 0; i <= pxa_last_gpio; i++) {
		/* skip GPIO2, 5, 6, 7, 8, they are not
		 * valid pins allow configuration
		 */
		if (i == 2 || i == 5 || i == 6 || i == 7 || i == 8)
			continue;

		gpio_desc[i].valid = 1;
	}

	/* Keypad GPIOs */
	for (i = 0; i < ARRAY_SIZE(pxa27x_pkwr_gpio); i++) {
		gpio = pxa27x_pkwr_gpio[i];
		gpio_desc[gpio].can_wakeup = 1;
		gpio_desc[gpio].keypad_gpio = 1;
		gpio_desc[gpio].mask = 1 << i;
	}

	/* Overwrite GPIO13 as a PWER wakeup source */
	for (i = 0; i <= 15; i++) {
		/* skip GPIO2, 5, 6, 7, 8 */
		if (GPIO_bit(i) & 0x1e4)
			continue;

		gpio_desc[i].can_wakeup = 1;
		gpio_desc[i].mask = GPIO_bit(i);
	}

	gpio_desc[35].can_wakeup = 1;
	gpio_desc[35].mask = PWER_WE35;

	INIT_GPIO_DESC_MUXED(WEMUX3, 31);
	INIT_GPIO_DESC_MUXED(WEMUX3, 113);
	INIT_GPIO_DESC_MUXED(WEMUX2, 38);
	INIT_GPIO_DESC_MUXED(WEMUX2, 53);
	INIT_GPIO_DESC_MUXED(WEMUX2, 40);
	INIT_GPIO_DESC_MUXED(WEMUX2, 36);
}
#else
static inline void pxa27x_mfp_init(void) {}
#endif /* CONFIG_PXA27x */

#ifdef CONFIG_PM
static unsigned long saved_gafr[2][4];
static unsigned long saved_gpdr[4];
static unsigned long saved_pgsr[4];

static int pxa2xx_mfp_suspend(struct sys_device *d, pm_message_t state)
{
	int i;

	for (i = 0; i <= gpio_to_bank(pxa_last_gpio); i++) {

		saved_gafr[0][i] = GAFR_L(i);
		saved_gafr[1][i] = GAFR_U(i);
		saved_gpdr[i] = GPDR(i * 32);
		saved_pgsr[i] = PGSR(i);

		GPDR(i * 32) = gpdr_lpm[i];
	}
	return 0;
}

static int pxa2xx_mfp_resume(struct sys_device *d)
{
	int i;

	for (i = 0; i <= gpio_to_bank(pxa_last_gpio); i++) {
		GAFR_L(i) = saved_gafr[0][i];
		GAFR_U(i) = saved_gafr[1][i];
		GPDR(i * 32) = saved_gpdr[i];
		PGSR(i) = saved_pgsr[i];
	}
	PSSR = PSSR_RDH | PSSR_PH;
	return 0;
}
#else
#define pxa2xx_mfp_suspend	NULL
#define pxa2xx_mfp_resume	NULL
#endif

struct sysdev_class pxa2xx_mfp_sysclass = {
	.name		= "mfp",
	.suspend	= pxa2xx_mfp_suspend,
	.resume		= pxa2xx_mfp_resume,
};

static int __init pxa2xx_mfp_init(void)
{
	int i;

	if (!cpu_is_pxa2xx())
		return 0;

	if (cpu_is_pxa25x())
		pxa25x_mfp_init();

	if (cpu_is_pxa27x())
		pxa27x_mfp_init();

	/* clear RDH bit to enable GPIO receivers after reset/sleep exit */
	PSSR = PSSR_RDH;

	/* initialize gafr_run[], pgsr_lpm[] from existing values */
	for (i = 0; i <= gpio_to_bank(pxa_last_gpio); i++)
		gpdr_lpm[i] = GPDR(i * 32);

	return sysdev_class_register(&pxa2xx_mfp_sysclass);
}
postcore_initcall(pxa2xx_mfp_init);
Commit	Line	Data
7facc2f9	1	/*
	2	* linux/arch/arm/mach-pxa/mfp-pxa2xx.c
	3	*
	4	* PXA2xx pin mux configuration support
	5	*
	6	* The GPIOs on PXA2xx can be configured as one of many alternate
	7	* functions, this is by concept samilar to the MFP configuration
	8	* on PXA3xx, what's more important, the low power pin state and
	9	* wakeup detection are also supported by the same framework.
	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License version 2 as
	13	* published by the Free Software Foundation.
	14	*/
	15
	16	#include <linux/module.h>
	17	#include <linux/kernel.h>
	18	#include <linux/init.h>
	19	#include <linux/sysdev.h>
	20
da065a0b	21	#include <mach/gpio.h>
a09e64fb RK	22	#include <mach/pxa2xx-regs.h>
a09e64fb RK	23	#include <mach/mfp-pxa2xx.h>
7facc2f9	24
	25	#include "generic.h"
	26
5a3d9651 EM	27	#define PGSR(x) __REG2(0x40F00020, (x) << 2)
	28	#define __GAFR(u, x) __REG2((u) ? 0x40E00058 : 0x40E00054, (x) << 3)
	29	#define GAFR_L(x) __GAFR(0, x)
	30	#define GAFR_U(x) __GAFR(1, x)
7facc2f9	31
	32	#define PWER_WE35 (1 << 24)
	33
c0a596d6	34	struct gpio_desc {
7facc2f9	35	unsigned valid : 1;
	36	unsigned can_wakeup : 1;
	37	unsigned keypad_gpio : 1;
067455aa	38	unsigned dir_inverted : 1;
7facc2f9	39	unsigned int mask; /* bit mask in PWER or PKWR */
99687114	40	unsigned int mux_mask; /* bit mask of muxed gpio bits, 0 if no mux */
7facc2f9	41	unsigned long config;
c0a596d6	42	};
	43
	44	static struct gpio_desc gpio_desc[MFP_PIN_GPIO127 + 1];
7facc2f9	45
5a3d9651	46	static unsigned long gpdr_lpm[4];
566b450c	47
c0a596d6	48	static int __mfp_config_gpio(unsigned gpio, unsigned long c)
7facc2f9	49	{
7facc2f9	50	unsigned long gafr, mask = GPIO_bit(gpio);
5a3d9651 EM	51	int bank = gpio_to_bank(gpio);
	52	int uorl = !!(gpio & 0x10); /* GAFRx_U or GAFRx_L ? */
	53	int shft = (gpio & 0xf) << 1;
	54	int fn = MFP_AF(c);
067455aa	55	int is_out = (c & MFP_DIR_OUT) ? 1 : 0;
7facc2f9	56
7facc2f9	57	if (fn > 3)
	58	return -EINVAL;
	59
5a3d9651 EM	60	/* alternate function and direction at run-time */
	61	gafr = (uorl == 0) ? GAFR_L(bank) : GAFR_U(bank);
	62	gafr = (gafr & ~(0x3 << shft)) \| (fn << shft);
7facc2f9	63
5a3d9651 EM	64	if (uorl == 0)
	65	GAFR_L(bank) = gafr;
	66	else
	67	GAFR_U(bank) = gafr;
	68
067455aa	69	if (is_out ^ gpio_desc[gpio].dir_inverted)
7facc2f9	70	GPDR(gpio) \|= mask;
	71	else
	72	GPDR(gpio) &= ~mask;
	73
5a3d9651 EM	74	/* alternate function and direction at low power mode */
	75	switch (c & MFP_LPM_STATE_MASK) {
	76	case MFP_LPM_DRIVE_HIGH:
	77	PGSR(bank) \|= mask;
067455aa	78	is_out = 1;
5a3d9651 EM	79	break;
	80	case MFP_LPM_DRIVE_LOW:
	81	PGSR(bank) &= ~mask;
067455aa	82	is_out = 1;
5a3d9651 EM	83	break;
	84	case MFP_LPM_DEFAULT:
	85	break;
	86	default:
	87	/* warning and fall through, treat as MFP_LPM_DEFAULT */
	88	pr_warning("%s: GPIO%d: unsupported low power mode\n",
	89	__func__, gpio);
	90	break;
	91	}
	92
067455aa	93	if (is_out ^ gpio_desc[gpio].dir_inverted)
5a3d9651 EM	94	gpdr_lpm[bank] \|= mask;
	95	else
	96	gpdr_lpm[bank] &= ~mask;
7facc2f9	97
c0a596d6	98	/* give early warning if MFP_LPM_CAN_WAKEUP is set on the
	99	* configurations of those pins not able to wakeup
	100	*/
	101	if ((c & MFP_LPM_CAN_WAKEUP) && !gpio_desc[gpio].can_wakeup) {
7facc2f9	102	pr_warning("%s: GPIO%d unable to wakeup\n",
	103	__func__, gpio);
	104	return -EINVAL;
	105	}
	106
067455aa	107	if ((c & MFP_LPM_CAN_WAKEUP) && is_out) {
c0a596d6	108	pr_warning("%s: output GPIO%d unable to wakeup\n",
	109	__func__, gpio);
	110	return -EINVAL;
7facc2f9	111	}
	112
	113	return 0;
	114	}
	115
0fedb0ca EM	116	static inline int __mfp_validate(int mfp)
	117	{
	118	int gpio = mfp_to_gpio(mfp);
	119
	120	if ((mfp > MFP_PIN_GPIO127) \|\| !gpio_desc[gpio].valid) {
	121	pr_warning("%s: GPIO%d is invalid pin\n", __func__, gpio);
	122	return -1;
	123	}
	124
	125	return gpio;
	126	}
	127
7facc2f9	128	void pxa2xx_mfp_config(unsigned long *mfp_cfgs, int num)
	129	{
	130	unsigned long flags;
	131	unsigned long *c;
	132	int i, gpio;
	133
	134	for (i = 0, c = mfp_cfgs; i < num; i++, c++) {
	135
0fedb0ca EM	136	gpio = __mfp_validate(MFP_PIN(*c));
0fedb0ca EM	137	if (gpio < 0)
7facc2f9	138	continue;
7facc2f9	139
	140	local_irq_save(flags);
	141
	142	gpio_desc[gpio].config = *c;
	143	__mfp_config_gpio(gpio, *c);
	144
	145	local_irq_restore(flags);
	146	}
	147	}
	148
566b450c EM	149	void pxa2xx_mfp_set_lpm(int mfp, unsigned long lpm)
566b450c EM	150	{
5a3d9651	151	unsigned long flags, c;
566b450c EM	152	int gpio;
	153
	154	gpio = __mfp_validate(mfp);
	155	if (gpio < 0)
	156	return;
	157
	158	local_irq_save(flags);
5a3d9651 EM	159
	160	c = gpio_desc[gpio].config;
	161	c = (c & ~MFP_LPM_STATE_MASK) \| lpm;
	162	__mfp_config_gpio(gpio, c);
	163
566b450c EM	164	local_irq_restore(flags);
	165	}
	166
c0a596d6	167	int gpio_set_wake(unsigned int gpio, unsigned int on)
	168	{
	169	struct gpio_desc *d;
99687114	170	unsigned long c, mux_taken;
c0a596d6	171
	172	if (gpio > mfp_to_gpio(MFP_PIN_GPIO127))
	173	return -EINVAL;
	174
	175	d = &gpio_desc[gpio];
	176	c = d->config;
	177
	178	if (!d->valid)
	179	return -EINVAL;
	180
	181	if (d->keypad_gpio)
	182	return -EINVAL;
	183
99687114 RJ	184	mux_taken = (PWER & d->mux_mask) & (~d->mask);
	185	if (on && mux_taken)
	186	return -EBUSY;
	187
c0a596d6	188	if (d->can_wakeup && (c & MFP_LPM_CAN_WAKEUP)) {
c0a596d6	189	if (on) {
99687114	190	PWER = (PWER & ~d->mux_mask) \| d->mask;
c0a596d6	191
	192	if (c & MFP_LPM_EDGE_RISE)
	193	PRER \|= d->mask;
	194	else
	195	PRER &= ~d->mask;
	196
	197	if (c & MFP_LPM_EDGE_FALL)
	198	PFER \|= d->mask;
	199	else
	200	PFER &= ~d->mask;
	201	} else {
	202	PWER &= ~d->mask;
	203	PRER &= ~d->mask;
	204	PFER &= ~d->mask;
	205	}
	206	}
	207	return 0;
	208	}
	209
7facc2f9	210	#ifdef CONFIG_PXA25x
5a3d9651	211	static void __init pxa25x_mfp_init(void)
7facc2f9	212	{
	213	int i;
	214
ddd244dd	215	for (i = 0; i <= pxa_last_gpio; i++)
5a3d9651	216	gpio_desc[i].valid = 1;
7facc2f9	217
5a3d9651 EM	218	for (i = 0; i <= 15; i++) {
	219	gpio_desc[i].can_wakeup = 1;
	220	gpio_desc[i].mask = GPIO_bit(i);
7facc2f9	221	}
067455aa EM	222
	223	/* PXA26x has additional 4 GPIOs (86/87/88/89) which has the
	224	* direction bit inverted in GPDR2. See PXA26x DM 4.1.1.
	225	*/
	226	for (i = 86; i <= pxa_last_gpio; i++)
	227	gpio_desc[i].dir_inverted = 1;
7facc2f9	228	}
5a3d9651 EM	229	#else
5a3d9651 EM	230	static inline void pxa25x_mfp_init(void) {}
7facc2f9	231	#endif /* CONFIG_PXA25x */
	232
	233	#ifdef CONFIG_PXA27x
c0a596d6	234	static int pxa27x_pkwr_gpio[] = {
7facc2f9	235	13, 16, 17, 34, 36, 37, 38, 39, 90, 91, 93, 94,
	236	95, 96, 97, 98, 99, 100, 101, 102
	237	};
	238
c0a596d6	239	int keypad_set_wake(unsigned int on)
	240	{
	241	unsigned int i, gpio, mask = 0;
	242
	243	if (!on) {
	244	PKWR = 0;
	245	return 0;
	246	}
	247
	248	for (i = 0; i < ARRAY_SIZE(pxa27x_pkwr_gpio); i++) {
	249
	250	gpio = pxa27x_pkwr_gpio[i];
	251
	252	if (gpio_desc[gpio].config & MFP_LPM_CAN_WAKEUP)
	253	mask \|= gpio_desc[gpio].mask;
	254	}
	255
	256	PKWR = mask;
	257	return 0;
	258	}
	259
99687114 RJ	260	#define PWER_WEMUX2_GPIO38 (1 << 16)
	261	#define PWER_WEMUX2_GPIO53 (2 << 16)
	262	#define PWER_WEMUX2_GPIO40 (3 << 16)
	263	#define PWER_WEMUX2_GPIO36 (4 << 16)
	264	#define PWER_WEMUX2_MASK (7 << 16)
	265	#define PWER_WEMUX3_GPIO31 (1 << 19)
	266	#define PWER_WEMUX3_GPIO113 (2 << 19)
	267	#define PWER_WEMUX3_MASK (3 << 19)
	268
	269	#define INIT_GPIO_DESC_MUXED(mux, gpio) \
	270	do { \
	271	gpio_desc[(gpio)].can_wakeup = 1; \
	272	gpio_desc[(gpio)].mask = PWER_ ## mux ## _GPIO ##gpio; \
	273	gpio_desc[(gpio)].mux_mask = PWER_ ## mux ## _MASK; \
	274	} while (0)
	275
5a3d9651	276	static void __init pxa27x_mfp_init(void)
7facc2f9	277	{
	278	int i, gpio;
	279
ddd244dd	280	for (i = 0; i <= pxa_last_gpio; i++) {
5a3d9651 EM	281	/* skip GPIO2, 5, 6, 7, 8, they are not
	282	* valid pins allow configuration
	283	*/
	284	if (i == 2 \|\| i == 5 \|\| i == 6 \|\| i == 7 \|\| i == 8)
	285	continue;
7facc2f9	286
5a3d9651 EM	287	gpio_desc[i].valid = 1;
5a3d9651 EM	288	}
7facc2f9	289
5a3d9651 EM	290	/* Keypad GPIOs */
	291	for (i = 0; i < ARRAY_SIZE(pxa27x_pkwr_gpio); i++) {
	292	gpio = pxa27x_pkwr_gpio[i];
	293	gpio_desc[gpio].can_wakeup = 1;
	294	gpio_desc[gpio].keypad_gpio = 1;
	295	gpio_desc[gpio].mask = 1 << i;
	296	}
7facc2f9	297
5a3d9651 EM	298	/* Overwrite GPIO13 as a PWER wakeup source */
	299	for (i = 0; i <= 15; i++) {
	300	/* skip GPIO2, 5, 6, 7, 8 */
	301	if (GPIO_bit(i) & 0x1e4)
	302	continue;
7facc2f9	303
5a3d9651 EM	304	gpio_desc[i].can_wakeup = 1;
	305	gpio_desc[i].mask = GPIO_bit(i);
	306	}
	307
	308	gpio_desc[35].can_wakeup = 1;
	309	gpio_desc[35].mask = PWER_WE35;
	310
99687114 RJ	311	INIT_GPIO_DESC_MUXED(WEMUX3, 31);
	312	INIT_GPIO_DESC_MUXED(WEMUX3, 113);
	313	INIT_GPIO_DESC_MUXED(WEMUX2, 38);
	314	INIT_GPIO_DESC_MUXED(WEMUX2, 53);
	315	INIT_GPIO_DESC_MUXED(WEMUX2, 40);
	316	INIT_GPIO_DESC_MUXED(WEMUX2, 36);
5a3d9651 EM	317	}
	318	#else
	319	static inline void pxa27x_mfp_init(void) {}
	320	#endif /* CONFIG_PXA27x */
	321
	322	#ifdef CONFIG_PM
	323	static unsigned long saved_gafr[2][4];
	324	static unsigned long saved_gpdr[4];
818bc814	325	static unsigned long saved_pgsr[4];
5a3d9651 EM	326
	327	static int pxa2xx_mfp_suspend(struct sys_device *d, pm_message_t state)
	328	{
	329	int i;
	330
ddd244dd	331	for (i = 0; i <= gpio_to_bank(pxa_last_gpio); i++) {
7facc2f9	332
5a3d9651 EM	333	saved_gafr[0][i] = GAFR_L(i);
	334	saved_gafr[1][i] = GAFR_U(i);
	335	saved_gpdr[i] = GPDR(i * 32);
818bc814	336	saved_pgsr[i] = PGSR(i);
5a3d9651 EM	337
5a3d9651 EM	338	GPDR(i * 32) = gpdr_lpm[i];
7facc2f9	339	}
5a3d9651 EM	340	return 0;
5a3d9651 EM	341	}
7facc2f9	342
5a3d9651 EM	343	static int pxa2xx_mfp_resume(struct sys_device *d)
	344	{
	345	int i;
	346
ddd244dd	347	for (i = 0; i <= gpio_to_bank(pxa_last_gpio); i++) {
5a3d9651 EM	348	GAFR_L(i) = saved_gafr[0][i];
	349	GAFR_U(i) = saved_gafr[1][i];
	350	GPDR(i * 32) = saved_gpdr[i];
818bc814	351	PGSR(i) = saved_pgsr[i];
5a3d9651 EM	352	}
5a3d9651 EM	353	PSSR = PSSR_RDH \| PSSR_PH;
7facc2f9	354	return 0;
7facc2f9	355	}
5a3d9651 EM	356	#else
	357	#define pxa2xx_mfp_suspend NULL
	358	#define pxa2xx_mfp_resume NULL
	359	#endif
	360
	361	struct sysdev_class pxa2xx_mfp_sysclass = {
	362	.name = "mfp",
	363	.suspend = pxa2xx_mfp_suspend,
	364	.resume = pxa2xx_mfp_resume,
	365	};
	366
	367	static int __init pxa2xx_mfp_init(void)
	368	{
	369	int i;
	370
e7f3c600 EM	371	if (!cpu_is_pxa2xx())
	372	return 0;
	373
5a3d9651 EM	374	if (cpu_is_pxa25x())
	375	pxa25x_mfp_init();
	376
	377	if (cpu_is_pxa27x())
	378	pxa27x_mfp_init();
	379
866bd435 TC	380	/* clear RDH bit to enable GPIO receivers after reset/sleep exit */
	381	PSSR = PSSR_RDH;
	382
5a3d9651	383	/* initialize gafr_run[], pgsr_lpm[] from existing values */
ddd244dd	384	for (i = 0; i <= gpio_to_bank(pxa_last_gpio); i++)
5a3d9651 EM	385	gpdr_lpm[i] = GPDR(i * 32);
	386
	387	return sysdev_class_register(&pxa2xx_mfp_sysclass);
	388	}
	389	postcore_initcall(pxa2xx_mfp_init);