[people/ms/u-boot.git] / drivers / gpio / adi_gpio2.c

/*
 * ADI GPIO2 Abstraction Layer
 * Support BF54x, BF60x and future processors.
 *
 * Copyright 2008-2013 Analog Devices Inc.
 *
 * Licensed under the GPL-2 or later
 */

#include <common.h>
#include <linux/errno.h>
#include <asm/gpio.h>

#define RESOURCE_LABEL_SIZE	16

static struct str_ident {
	char name[RESOURCE_LABEL_SIZE];
} str_ident[MAX_RESOURCES];

static void gpio_error(unsigned gpio)
{
	printf("adi_gpio2: GPIO %d wasn't requested!\n", gpio);
}

static void set_label(unsigned short ident, const char *label)
{
	if (label) {
		strncpy(str_ident[ident].name, label,
			RESOURCE_LABEL_SIZE);
		str_ident[ident].name[RESOURCE_LABEL_SIZE - 1] = 0;
	}
}

static char *get_label(unsigned short ident)
{
	return *str_ident[ident].name ? str_ident[ident].name : "UNKNOWN";
}

static int cmp_label(unsigned short ident, const char *label)
{
	if (label == NULL)
		printf("adi_gpio2: please provide none-null label\n");

	if (label)
		return strcmp(str_ident[ident].name, label);
	else
		return -EINVAL;
}

#define map_entry(m, i)      reserved_##m##_map[gpio_bank(i)]
#define is_reserved(m, i, e) (map_entry(m, i) & gpio_bit(i))
#define reserve(m, i)        (map_entry(m, i) |= gpio_bit(i))
#define unreserve(m, i)      (map_entry(m, i) &= ~gpio_bit(i))
#define DECLARE_RESERVED_MAP(m, c) unsigned short reserved_##m##_map[c]

static DECLARE_RESERVED_MAP(gpio, GPIO_BANK_NUM);
static DECLARE_RESERVED_MAP(peri, gpio_bank(MAX_RESOURCES));

inline int check_gpio(unsigned gpio)
{
#if defined(CONFIG_BF54x)
	if (gpio == GPIO_PB15 || gpio == GPIO_PC14 || gpio == GPIO_PC15 ||
		gpio == GPIO_PH14 || gpio == GPIO_PH15 ||
		gpio == GPIO_PJ14 || gpio == GPIO_PJ15)
		return -EINVAL;
#endif
	if (gpio >= MAX_GPIOS)
		return -EINVAL;
	return 0;
}

static void port_setup(unsigned gpio, unsigned short usage)
{
#if defined(CONFIG_BF54x)
	if (usage == GPIO_USAGE)
		gpio_array[gpio_bank(gpio)]->port_fer &= ~gpio_bit(gpio);
	else
		gpio_array[gpio_bank(gpio)]->port_fer |= gpio_bit(gpio);
#else
	if (usage == GPIO_USAGE)
		gpio_array[gpio_bank(gpio)]->port_fer_clear = gpio_bit(gpio);
	else
		gpio_array[gpio_bank(gpio)]->port_fer_set = gpio_bit(gpio);
#endif
}

inline void portmux_setup(unsigned short per)
{
	u32 pmux;
	u16 ident = P_IDENT(per);
	u16 function = P_FUNCT2MUX(per);

	pmux = gpio_array[gpio_bank(ident)]->port_mux;

	pmux &= ~(0x3 << (2 * gpio_sub_n(ident)));
	pmux |= (function & 0x3) << (2 * gpio_sub_n(ident));

	gpio_array[gpio_bank(ident)]->port_mux = pmux;
}

inline u16 get_portmux(unsigned short per)
{
	u32 pmux;
	u16 ident = P_IDENT(per);

	pmux = gpio_array[gpio_bank(ident)]->port_mux;

	return pmux >> (2 * gpio_sub_n(ident)) & 0x3;
}

unsigned short get_gpio_dir(unsigned gpio)
{
	return 0x01 &
		(gpio_array[gpio_bank(gpio)]->dir_clear >> gpio_sub_n(gpio));
}

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

int peripheral_request(unsigned short per, const char *label)
{
	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 -EINVAL;

	BUG_ON(ident >= MAX_RESOURCES);

	/* If a pin can be muxed as either GPIO or peripheral, make
	 * sure it is not already a GPIO pin when we request it.
	 */
	if (unlikely(!check_gpio(ident) && is_reserved(gpio, ident, 1))) {
		printf("%s: Peripheral %d is already reserved as GPIO by %s!\n",
		       __func__, ident, get_label(ident));
		return -EBUSY;
	}

	if (unlikely(is_reserved(peri, ident, 1))) {
		/*
		 * Pin functions like AMC address strobes my
		 * be requested and used by several drivers
		 */

		if (!((per & P_MAYSHARE) &&
			get_portmux(per) == 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;

			printf("%s: Peripheral %d function %d is already "
				"reserved by %s!\n", __func__, ident,
				P_FUNCT2MUX(per), get_label(ident));
			return -EBUSY;
		}
	}

 anyway:
	reserve(peri, ident);

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

	set_label(ident, label);

	return 0;
}

int peripheral_request_list(const 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;
}

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

	if (per & P_DONTCARE)
		return;

	if (!(per & P_DEFINED))
		return;

	if (unlikely(!is_reserved(peri, ident, 0)))
		return;

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

	unreserve(peri, ident);

	set_label(ident, "free");
}

void peripheral_free_list(const unsigned short per[])
{
	u16 cnt;
	for (cnt = 0; per[cnt] != 0; cnt++)
		peripheral_free(per[cnt]);
}

/***********************************************************
*
* FUNCTIONS: GPIO Driver
*
* INPUTS/OUTPUTS:
* gpio	PIO Number between 0 and MAX_GPIOS
* label	String
*
* DESCRIPTION: GPIO Driver API
**************************************************************/

int gpio_request(unsigned gpio, const char *label)
{
	if (check_gpio(gpio) < 0)
		return -EINVAL;

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

	if (cmp_label(gpio, label) == 0)
		return 0;

	if (unlikely(is_reserved(gpio, gpio, 1))) {
		printf("adi_gpio2: GPIO %d is already reserved by %s!\n",
			gpio, get_label(gpio));
		return -EBUSY;
	}
	if (unlikely(is_reserved(peri, gpio, 1))) {
		printf("adi_gpio2: GPIO %d is already reserved as Peripheral "
			"by %s!\n", gpio, get_label(gpio));
		return -EBUSY;
	}

	reserve(gpio, gpio);
	set_label(gpio, label);

	port_setup(gpio, GPIO_USAGE);

	return 0;
}

int gpio_free(unsigned gpio)
{
	if (check_gpio(gpio) < 0)
		return -1;

	if (unlikely(!is_reserved(gpio, gpio, 0))) {
		gpio_error(gpio);
		return -1;
	}

	unreserve(gpio, gpio);

	set_label(gpio, "free");

	return 0;
}

#ifdef ADI_SPECIAL_GPIO_BANKS
static DECLARE_RESERVED_MAP(special_gpio, gpio_bank(MAX_RESOURCES));

int special_gpio_request(unsigned gpio, const char *label)
{
	/*
	 * Allow that the identical GPIO can
	 * be requested from the same driver twice
	 * Do nothing and return -
	 */

	if (cmp_label(gpio, label) == 0)
		return 0;

	if (unlikely(is_reserved(special_gpio, gpio, 1))) {
		printf("adi_gpio2: GPIO %d is already reserved by %s!\n",
			gpio, get_label(gpio));
		return -EBUSY;
	}
	if (unlikely(is_reserved(peri, gpio, 1))) {
		printf("adi_gpio2: GPIO %d is already reserved as Peripheral "
			"by %s!\n", gpio, get_label(gpio));

		return -EBUSY;
	}

	reserve(special_gpio, gpio);
	reserve(peri, gpio);

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

	return 0;
}

void special_gpio_free(unsigned gpio)
{
	if (unlikely(!is_reserved(special_gpio, gpio, 0))) {
		gpio_error(gpio);
		return;
	}

	unreserve(special_gpio, gpio);
	unreserve(peri, gpio);
	set_label(gpio, "free");
}
#endif

static inline void __gpio_direction_input(unsigned gpio)
{
	gpio_array[gpio_bank(gpio)]->dir_clear = gpio_bit(gpio);
#if defined(CONFIG_BF54x)
	gpio_array[gpio_bank(gpio)]->inen |= gpio_bit(gpio);
#else
	gpio_array[gpio_bank(gpio)]->inen_set = gpio_bit(gpio);
#endif
}

int gpio_direction_input(unsigned gpio)
{
	unsigned long flags;

	if (!is_reserved(gpio, gpio, 0)) {
		gpio_error(gpio);
		return -EINVAL;
	}

	local_irq_save(flags);
	__gpio_direction_input(gpio);
	local_irq_restore(flags);

	return 0;
}

int gpio_set_value(unsigned gpio, int arg)
{
	if (arg)
		gpio_array[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
	else
		gpio_array[gpio_bank(gpio)]->data_clear = gpio_bit(gpio);

	return 0;
}

int gpio_direction_output(unsigned gpio, int value)
{
	unsigned long flags;

	if (!is_reserved(gpio, gpio, 0)) {
		gpio_error(gpio);
		return -EINVAL;
	}

	local_irq_save(flags);

#if defined(CONFIG_BF54x)
	gpio_array[gpio_bank(gpio)]->inen &= ~gpio_bit(gpio);
#else
	gpio_array[gpio_bank(gpio)]->inen_clear = gpio_bit(gpio);
#endif
	gpio_set_value(gpio, value);
	gpio_array[gpio_bank(gpio)]->dir_set = gpio_bit(gpio);

	local_irq_restore(flags);

	return 0;
}

int gpio_get_value(unsigned gpio)
{
	return 1 & (gpio_array[gpio_bank(gpio)]->data >> gpio_sub_n(gpio));
}

void gpio_labels(void)
{
	int c, gpio;

	for (c = 0; c < MAX_RESOURCES; c++) {
		gpio = is_reserved(gpio, c, 1);
		if (!check_gpio(c) && gpio)
			printf("GPIO_%d:\t%s\tGPIO %s\n", c, get_label(c),
				get_gpio_dir(c) ? "OUTPUT" : "INPUT");
		else if (is_reserved(peri, c, 1))
			printf("GPIO_%d:\t%s\tPeripheral\n", c, get_label(c));
		else
			continue;
	}
}
Commit	Line	Data
da34aae5 SZ	1	/*
	2	* ADI GPIO2 Abstraction Layer
	3	* Support BF54x, BF60x and future processors.
	4	*
	5	* Copyright 2008-2013 Analog Devices Inc.
	6	*
	7	* Licensed under the GPL-2 or later
	8	*/
	9
	10	#include <common.h>
1221ce45	11	#include <linux/errno.h>
da34aae5	12	#include <asm/gpio.h>
da34aae5 SZ	13
	14	#define RESOURCE_LABEL_SIZE 16
	15
	16	static struct str_ident {
	17	char name[RESOURCE_LABEL_SIZE];
	18	} str_ident[MAX_RESOURCES];
	19
	20	static void gpio_error(unsigned gpio)
	21	{
	22	printf("adi_gpio2: GPIO %d wasn't requested!\n", gpio);
	23	}
	24
	25	static void set_label(unsigned short ident, const char *label)
	26	{
	27	if (label) {
	28	strncpy(str_ident[ident].name, label,
	29	RESOURCE_LABEL_SIZE);
	30	str_ident[ident].name[RESOURCE_LABEL_SIZE - 1] = 0;
	31	}
	32	}
	33
	34	static char *get_label(unsigned short ident)
	35	{
	36	return *str_ident[ident].name ? str_ident[ident].name : "UNKNOWN";
	37	}
	38
	39	static int cmp_label(unsigned short ident, const char *label)
	40	{
	41	if (label == NULL)
	42	printf("adi_gpio2: please provide none-null label\n");
	43
	44	if (label)
	45	return strcmp(str_ident[ident].name, label);
	46	else
	47	return -EINVAL;
	48	}
	49
	50	#define map_entry(m, i) reserved_##m##_map[gpio_bank(i)]
	51	#define is_reserved(m, i, e) (map_entry(m, i) & gpio_bit(i))
	52	#define reserve(m, i) (map_entry(m, i) \|= gpio_bit(i))
	53	#define unreserve(m, i) (map_entry(m, i) &= ~gpio_bit(i))
	54	#define DECLARE_RESERVED_MAP(m, c) unsigned short reserved_##m##_map[c]
	55
	56	static DECLARE_RESERVED_MAP(gpio, GPIO_BANK_NUM);
	57	static DECLARE_RESERVED_MAP(peri, gpio_bank(MAX_RESOURCES));
	58
	59	inline int check_gpio(unsigned gpio)
	60	{
	61	#if defined(CONFIG_BF54x)
	62	if (gpio == GPIO_PB15 \|\| gpio == GPIO_PC14 \|\| gpio == GPIO_PC15 \|\|
	63	gpio == GPIO_PH14 \|\| gpio == GPIO_PH15 \|\|
	64	gpio == GPIO_PJ14 \|\| gpio == GPIO_PJ15)
	65	return -EINVAL;
	66	#endif
	67	if (gpio >= MAX_GPIOS)
	68	return -EINVAL;
	69	return 0;
	70	}
	71
	72	static void port_setup(unsigned gpio, unsigned short usage)
	73	{
	74	#if defined(CONFIG_BF54x)
	75	if (usage == GPIO_USAGE)
	76	gpio_array[gpio_bank(gpio)]->port_fer &= ~gpio_bit(gpio);
77	else
78	gpio_array[gpio_bank(gpio)]->port_fer \|= gpio_bit(gpio);
79	#else
80	if (usage == GPIO_USAGE)
81	gpio_array[gpio_bank(gpio)]->port_fer_clear = gpio_bit(gpio);
82	else
83	gpio_array[gpio_bank(gpio)]->port_fer_set = gpio_bit(gpio);
84	#endif
da34aae5 SZ	85	}
	86
	87	inline void portmux_setup(unsigned short per)
	88	{
	89	u32 pmux;
	90	u16 ident = P_IDENT(per);
	91	u16 function = P_FUNCT2MUX(per);
	92
	93	pmux = gpio_array[gpio_bank(ident)]->port_mux;
	94
	95	pmux &= ~(0x3 << (2 * gpio_sub_n(ident)));
	96	pmux \|= (function & 0x3) << (2 * gpio_sub_n(ident));
	97
	98	gpio_array[gpio_bank(ident)]->port_mux = pmux;
	99	}
	100
	101	inline u16 get_portmux(unsigned short per)
	102	{
	103	u32 pmux;
	104	u16 ident = P_IDENT(per);
	105
	106	pmux = gpio_array[gpio_bank(ident)]->port_mux;
	107
	108	return pmux >> (2 * gpio_sub_n(ident)) & 0x3;
	109	}
	110
	111	unsigned short get_gpio_dir(unsigned gpio)
	112	{
	113	return 0x01 &
	114	(gpio_array[gpio_bank(gpio)]->dir_clear >> gpio_sub_n(gpio));
	115	}
	116
	117	/***********************************************************
	118	*
	119	* FUNCTIONS: Peripheral Resource Allocation
	120	* and PortMux Setup
	121	*
	122	* INPUTS/OUTPUTS:
	123	* per Peripheral Identifier
	124	* label String
	125	*
	126	* DESCRIPTION: Peripheral Resource Allocation and Setup API
	127	**************************************************************/
	128
	129	int peripheral_request(unsigned short per, const char *label)
	130	{
	131	unsigned short ident = P_IDENT(per);
	132
	133	/*
	134	* Don't cares are pins with only one dedicated function
	135	*/
	136
	137	if (per & P_DONTCARE)
	138	return 0;
	139
	140	if (!(per & P_DEFINED))
7c84319a	141	return -EINVAL;
da34aae5 SZ	142
	143	BUG_ON(ident >= MAX_RESOURCES);
	144
	145	/* If a pin can be muxed as either GPIO or peripheral, make
	146	* sure it is not already a GPIO pin when we request it.
	147	*/
	148	if (unlikely(!check_gpio(ident) && is_reserved(gpio, ident, 1))) {
	149	printf("%s: Peripheral %d is already reserved as GPIO by %s!\n",
	150	__func__, ident, get_label(ident));
	151	return -EBUSY;
	152	}
	153
	154	if (unlikely(is_reserved(peri, ident, 1))) {
	155	/*
	156	* Pin functions like AMC address strobes my
	157	* be requested and used by several drivers
	158	*/
	159
	160	if (!((per & P_MAYSHARE) &&
	161	get_portmux(per) == P_FUNCT2MUX(per))) {
	162	/*
	163	* Allow that the identical pin function can
	164	* be requested from the same driver twice
	165	*/
	166
	167	if (cmp_label(ident, label) == 0)
	168	goto anyway;
	169
	170	printf("%s: Peripheral %d function %d is already "
	171	"reserved by %s!\n", __func__, ident,
	172	P_FUNCT2MUX(per), get_label(ident));
	173	return -EBUSY;
	174	}
	175	}
	176
	177	anyway:
	178	reserve(peri, ident);
	179
	180	portmux_setup(per);
	181	port_setup(ident, PERIPHERAL_USAGE);
	182
	183	set_label(ident, label);
	184
	185	return 0;
	186	}
	187
	188	int peripheral_request_list(const unsigned short per[], const char *label)
	189	{
	190	u16 cnt;
	191	int ret;
	192
	193	for (cnt = 0; per[cnt] != 0; cnt++) {
	194	ret = peripheral_request(per[cnt], label);
	195
	196	if (ret < 0) {
	197	for (; cnt > 0; cnt--)
	198	peripheral_free(per[cnt - 1]);
	199
	200	return ret;
	201	}
	202	}
	203
	204	return 0;
	205	}
206
207	void peripheral_free(unsigned short per)
208	{
209	unsigned short ident = P_IDENT(per);
210
211	if (per & P_DONTCARE)
212	return;
213
214	if (!(per & P_DEFINED))
215	return;
216
217	if (unlikely(!is_reserved(peri, ident, 0)))
218	return;
219
220	if (!(per & P_MAYSHARE))
221	port_setup(ident, GPIO_USAGE);
222
223	unreserve(peri, ident);
224
225	set_label(ident, "free");
226	}
227
228	void peripheral_free_list(const unsigned short per[])
229	{
230	u16 cnt;
231	for (cnt = 0; per[cnt] != 0; cnt++)
232	peripheral_free(per[cnt]);
233	}
234
235	/***********************************************************
236	*
237	* FUNCTIONS: GPIO Driver
238	*
239	* INPUTS/OUTPUTS:
240	* gpio PIO Number between 0 and MAX_GPIOS
241	* label String
242	*
243	* DESCRIPTION: GPIO Driver API
244	**************************************************************/
245
246	int gpio_request(unsigned gpio, const char *label)
247	{
248	if (check_gpio(gpio) < 0)
249	return -EINVAL;
250
251	/*
252	* Allow that the identical GPIO can
253	* be requested from the same driver twice
254	* Do nothing and return -
255	*/
256
257	if (cmp_label(gpio, label) == 0)
258	return 0;
259
260	if (unlikely(is_reserved(gpio, gpio, 1))) {
261	printf("adi_gpio2: GPIO %d is already reserved by %s!\n",
262	gpio, get_label(gpio));
263	return -EBUSY;
264	}
265	if (unlikely(is_reserved(peri, gpio, 1))) {
266	printf("adi_gpio2: GPIO %d is already reserved as Peripheral "
267	"by %s!\n", gpio, get_label(gpio));
268	return -EBUSY;
269	}
270
271	reserve(gpio, gpio);
272	set_label(gpio, label);
273
274	port_setup(gpio, GPIO_USAGE);
275
276	return 0;
277	}
278
279	int gpio_free(unsigned gpio)
280	{
281	if (check_gpio(gpio) < 0)
282	return -1;
283
284	if (unlikely(!is_reserved(gpio, gpio, 0))) {
285	gpio_error(gpio);
286	return -1;
287	}
288
289	unreserve(gpio, gpio);
290
291	set_label(gpio, "free");
292
293	return 0;
294	}
295
296	#ifdef ADI_SPECIAL_GPIO_BANKS
297	static DECLARE_RESERVED_MAP(special_gpio, gpio_bank(MAX_RESOURCES));
298
299	int special_gpio_request(unsigned gpio, const char *label)
300	{
301	/*
302	* Allow that the identical GPIO can
303	* be requested from the same driver twice
304	* Do nothing and return -
305	*/
306
307	if (cmp_label(gpio, label) == 0)
308	return 0;
309
310	if (unlikely(is_reserved(special_gpio, gpio, 1))) {
311	printf("adi_gpio2: GPIO %d is already reserved by %s!\n",
312	gpio, get_label(gpio));
313	return -EBUSY;
314	}
315	if (unlikely(is_reserved(peri, gpio, 1))) {
316	printf("adi_gpio2: GPIO %d is already reserved as Peripheral "
317	"by %s!\n", gpio, get_label(gpio));
318
319	return -EBUSY;
320	}
321
322	reserve(special_gpio, gpio);
323	reserve(peri, gpio);
324
325	set_label(gpio, label);
326	port_setup(gpio, GPIO_USAGE);
327
328	return 0;
329	}
330
331	void special_gpio_free(unsigned gpio)
332	{
333	if (unlikely(!is_reserved(special_gpio, gpio, 0))) {
334	gpio_error(gpio);
335	return;
336	}
337
2ced773a AL	338	unreserve(special_gpio, gpio);
2ced773a AL	339	unreserve(peri, gpio);
da34aae5 SZ	340	set_label(gpio, "free");
	341	}
	342	#endif
	343
	344	static inline void __gpio_direction_input(unsigned gpio)
	345	{
	346	gpio_array[gpio_bank(gpio)]->dir_clear = gpio_bit(gpio);
	347	#if defined(CONFIG_BF54x)
	348	gpio_array[gpio_bank(gpio)]->inen \|= gpio_bit(gpio);
	349	#else
	350	gpio_array[gpio_bank(gpio)]->inen_set = gpio_bit(gpio);
	351	#endif
	352	}
	353
	354	int gpio_direction_input(unsigned gpio)
	355	{
	356	unsigned long flags;
	357
	358	if (!is_reserved(gpio, gpio, 0)) {
	359	gpio_error(gpio);
	360	return -EINVAL;
	361	}
	362
	363	local_irq_save(flags);
	364	__gpio_direction_input(gpio);
	365	local_irq_restore(flags);
	366
	367	return 0;
	368	}
	369
	370	int gpio_set_value(unsigned gpio, int arg)
	371	{
	372	if (arg)
	373	gpio_array[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
	374	else
	375	gpio_array[gpio_bank(gpio)]->data_clear = gpio_bit(gpio);
	376
	377	return 0;
	378	}
	379
	380	int gpio_direction_output(unsigned gpio, int value)
	381	{
	382	unsigned long flags;
	383
	384	if (!is_reserved(gpio, gpio, 0)) {
	385	gpio_error(gpio);
	386	return -EINVAL;
	387	}
	388
	389	local_irq_save(flags);
	390
	391	#if defined(CONFIG_BF54x)
	392	gpio_array[gpio_bank(gpio)]->inen &= ~gpio_bit(gpio);
	393	#else
	394	gpio_array[gpio_bank(gpio)]->inen_clear = gpio_bit(gpio);
	395	#endif
	396	gpio_set_value(gpio, value);
	397	gpio_array[gpio_bank(gpio)]->dir_set = gpio_bit(gpio);
	398
	399	local_irq_restore(flags);
	400
	401	return 0;
	402	}
	403
404	int gpio_get_value(unsigned gpio)
405	{
406	return 1 & (gpio_array[gpio_bank(gpio)]->data >> gpio_sub_n(gpio));
407	}
408
409	void gpio_labels(void)
410	{
411	int c, gpio;
412
413	for (c = 0; c < MAX_RESOURCES; c++) {
414	gpio = is_reserved(gpio, c, 1);
415	if (!check_gpio(c) && gpio)
416	printf("GPIO_%d:\t%s\tGPIO %s\n", c, get_label(c),
417	get_gpio_dir(c) ? "OUTPUT" : "INPUT");
418	else if (is_reserved(peri, c, 1))
419	printf("GPIO_%d:\t%s\tPeripheral\n", c, get_label(c));
420	else
421	continue;
422	}
423	}