[J-u-boot.git] / drivers / gpio / sunxi_gpio.c

/*
 * (C) Copyright 2012 Henrik Nordstrom <[email protected]>
 *
 * Based on earlier arch/arm/cpu/armv7/sunxi/gpio.c:
 *
 * (C) Copyright 2007-2011
 * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
 * Tom Cubie <[email protected]>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <dm.h>
#include <errno.h>
#include <fdtdec.h>
#include <malloc.h>
#include <asm/arch/gpio.h>
#include <asm/io.h>
#include <asm/gpio.h>
#include <dm/device-internal.h>

DECLARE_GLOBAL_DATA_PTR;

#define SUNXI_GPIOS_PER_BANK	SUNXI_GPIO_A_NR

struct sunxi_gpio_platdata {
	struct sunxi_gpio *regs;
	const char *bank_name;	/* Name of bank, e.g. "B" */
	int gpio_count;
};

#ifndef CONFIG_DM_GPIO
static int sunxi_gpio_output(u32 pin, u32 val)
{
	u32 dat;
	u32 bank = GPIO_BANK(pin);
	u32 num = GPIO_NUM(pin);
	struct sunxi_gpio *pio = BANK_TO_GPIO(bank);

	dat = readl(&pio->dat);
	if (val)
		dat |= 0x1 << num;
	else
		dat &= ~(0x1 << num);

	writel(dat, &pio->dat);

	return 0;
}

static int sunxi_gpio_input(u32 pin)
{
	u32 dat;
	u32 bank = GPIO_BANK(pin);
	u32 num = GPIO_NUM(pin);
	struct sunxi_gpio *pio = BANK_TO_GPIO(bank);

	dat = readl(&pio->dat);
	dat >>= num;

	return dat & 0x1;
}

int gpio_request(unsigned gpio, const char *label)
{
	return 0;
}

int gpio_free(unsigned gpio)
{
	return 0;
}

int gpio_direction_input(unsigned gpio)
{
	sunxi_gpio_set_cfgpin(gpio, SUNXI_GPIO_INPUT);

	return 0;
}

int gpio_direction_output(unsigned gpio, int value)
{
	sunxi_gpio_set_cfgpin(gpio, SUNXI_GPIO_OUTPUT);

	return sunxi_gpio_output(gpio, value);
}

int gpio_get_value(unsigned gpio)
{
	return sunxi_gpio_input(gpio);
}

int gpio_set_value(unsigned gpio, int value)
{
	return sunxi_gpio_output(gpio, value);
}

int sunxi_name_to_gpio(const char *name)
{
	int group = 0;
	int groupsize = 9 * 32;
	long pin;
	char *eptr;

	if (*name == 'P' || *name == 'p')
		name++;
	if (*name >= 'A') {
		group = *name - (*name > 'a' ? 'a' : 'A');
		groupsize = 32;
		name++;
	}

	pin = simple_strtol(name, &eptr, 10);
	if (!*name || *eptr)
		return -1;
	if (pin < 0 || pin > groupsize || group >= 9)
		return -1;
	return group * 32 + pin;
}
#endif

int sunxi_name_to_gpio_bank(const char *name)
{
	int group = 0;

	if (*name == 'P' || *name == 'p')
		name++;
	if (*name >= 'A') {
		group = *name - (*name > 'a' ? 'a' : 'A');
		return group;
	}

	return -1;
}

#ifdef CONFIG_DM_GPIO
/* TODO([email protected]): Remove this function and use device tree */
int sunxi_name_to_gpio(const char *name)
{
	unsigned int gpio;
	int ret;
#if !defined CONFIG_SPL_BUILD && defined CONFIG_AXP_GPIO
	char lookup[8];

	if (strcasecmp(name, "AXP0-VBUS-DETECT") == 0) {
		sprintf(lookup, SUNXI_GPIO_AXP0_PREFIX "%d",
			SUNXI_GPIO_AXP0_VBUS_DETECT);
		name = lookup;
	} else if (strcasecmp(name, "AXP0-VBUS-ENABLE") == 0) {
		sprintf(lookup, SUNXI_GPIO_AXP0_PREFIX "%d",
			SUNXI_GPIO_AXP0_VBUS_ENABLE);
		name = lookup;
	}
#endif
	ret = gpio_lookup_name(name, NULL, NULL, &gpio);

	return ret ? ret : gpio;
}

static int sunxi_gpio_direction_input(struct udevice *dev, unsigned offset)
{
	struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);

	sunxi_gpio_set_cfgbank(plat->regs, offset, SUNXI_GPIO_INPUT);

	return 0;
}

static int sunxi_gpio_direction_output(struct udevice *dev, unsigned offset,
				       int value)
{
	struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
	u32 num = GPIO_NUM(offset);

	sunxi_gpio_set_cfgbank(plat->regs, offset, SUNXI_GPIO_OUTPUT);
	clrsetbits_le32(&plat->regs->dat, 1 << num, value ? (1 << num) : 0);

	return 0;
}

static int sunxi_gpio_get_value(struct udevice *dev, unsigned offset)
{
	struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
	u32 num = GPIO_NUM(offset);
	unsigned dat;

	dat = readl(&plat->regs->dat);
	dat >>= num;

	return dat & 0x1;
}

static int sunxi_gpio_set_value(struct udevice *dev, unsigned offset,
				int value)
{
	struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
	u32 num = GPIO_NUM(offset);

	clrsetbits_le32(&plat->regs->dat, 1 << num, value ? (1 << num) : 0);
	return 0;
}

static int sunxi_gpio_get_function(struct udevice *dev, unsigned offset)
{
	struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
	int func;

	func = sunxi_gpio_get_cfgbank(plat->regs, offset);
	if (func == SUNXI_GPIO_OUTPUT)
		return GPIOF_OUTPUT;
	else if (func == SUNXI_GPIO_INPUT)
		return GPIOF_INPUT;
	else
		return GPIOF_FUNC;
}

static const struct dm_gpio_ops gpio_sunxi_ops = {
	.direction_input	= sunxi_gpio_direction_input,
	.direction_output	= sunxi_gpio_direction_output,
	.get_value		= sunxi_gpio_get_value,
	.set_value		= sunxi_gpio_set_value,
	.get_function		= sunxi_gpio_get_function,
};

/**
 * Returns the name of a GPIO bank
 *
 * GPIO banks are named A, B, C, ...
 *
 * @bank:	Bank number (0, 1..n-1)
 * @return allocated string containing the name
 */
static char *gpio_bank_name(int bank)
{
	char *name;

	name = malloc(3);
	if (name) {
		name[0] = 'P';
		name[1] = 'A' + bank;
		name[2] = '\0';
	}

	return name;
}

static int gpio_sunxi_probe(struct udevice *dev)
{
	struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
	struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);

	/* Tell the uclass how many GPIOs we have */
	if (plat) {
		uc_priv->gpio_count = plat->gpio_count;
		uc_priv->bank_name = plat->bank_name;
	}

	return 0;
}
/**
 * We have a top-level GPIO device with no actual GPIOs. It has a child
 * device for each Sunxi bank.
 */
static int gpio_sunxi_bind(struct udevice *parent)
{
	struct sunxi_gpio_platdata *plat = parent->platdata;
	struct sunxi_gpio_reg *ctlr;
	int bank, no_banks, ret, start;

	/* If this is a child device, there is nothing to do here */
	if (plat)
		return 0;

	if (fdt_node_check_compatible(gd->fdt_blob, parent->of_offset,
				"allwinner,sun6i-a31-r-pinctrl") == 0) {
		start = 'L' - 'A';
		no_banks = 2; /* L & M */
	} else if (fdt_node_check_compatible(gd->fdt_blob, parent->of_offset,
				"allwinner,sun8i-a23-r-pinctrl") == 0) {
		start = 'L' - 'A';
		no_banks = 1; /* L only */
	} else {
		start = 0;
		no_banks = SUNXI_GPIO_BANKS;
	}

	ctlr = (struct sunxi_gpio_reg *)dev_get_addr(parent);
	for (bank = 0; bank < no_banks; bank++) {
		struct sunxi_gpio_platdata *plat;
		struct udevice *dev;

		plat = calloc(1, sizeof(*plat));
		if (!plat)
			return -ENOMEM;
		plat->regs = &ctlr->gpio_bank[bank];
		plat->bank_name = gpio_bank_name(start + bank);
		plat->gpio_count = SUNXI_GPIOS_PER_BANK;

		ret = device_bind(parent, parent->driver,
					plat->bank_name, plat, -1, &dev);
		if (ret)
			return ret;
		dev->of_offset = parent->of_offset;
	}

	return 0;
}

static const struct udevice_id sunxi_gpio_ids[] = {
	{ .compatible = "allwinner,sun4i-a10-pinctrl" },
	{ .compatible = "allwinner,sun5i-a10s-pinctrl" },
	{ .compatible = "allwinner,sun5i-a13-pinctrl" },
	{ .compatible = "allwinner,sun6i-a31-pinctrl" },
	{ .compatible = "allwinner,sun6i-a31s-pinctrl" },
	{ .compatible = "allwinner,sun7i-a20-pinctrl" },
	{ .compatible = "allwinner,sun8i-a23-pinctrl" },
	{ .compatible = "allwinner,sun8i-a33-pinctrl" },
	{ .compatible = "allwinner,sun9i-a80-pinctrl" },
	{ .compatible = "allwinner,sun6i-a31-r-pinctrl" },
	{ .compatible = "allwinner,sun8i-a23-r-pinctrl" },
	{ }
};

U_BOOT_DRIVER(gpio_sunxi) = {
	.name	= "gpio_sunxi",
	.id	= UCLASS_GPIO,
	.ops	= &gpio_sunxi_ops,
	.of_match = sunxi_gpio_ids,
	.bind	= gpio_sunxi_bind,
	.probe	= gpio_sunxi_probe,
};
#endif
Commit	Line	Data
abce2c62 IC	1	/*
	2	* (C) Copyright 2012 Henrik Nordstrom <[email protected]>
	3	*
	4	* Based on earlier arch/arm/cpu/armv7/sunxi/gpio.c:
	5	*
	6	* (C) Copyright 2007-2011
	7	* Allwinner Technology Co., Ltd. <www.allwinnertech.com>
	8	* Tom Cubie <[email protected]>
	9	*
	10	* SPDX-License-Identifier: GPL-2.0+
	11	*/
	12
	13	#include <common.h>
7aa97485 SG	14	#include <dm.h>
	15	#include <errno.h>
	16	#include <fdtdec.h>
	17	#include <malloc.h>
2fcf033d	18	#include <asm/arch/gpio.h>
abce2c62 IC	19	#include <asm/io.h>
abce2c62 IC	20	#include <asm/gpio.h>
7aa97485	21	#include <dm/device-internal.h>
abce2c62	22
7aa97485 SG	23	DECLARE_GLOBAL_DATA_PTR;
	24
	25	#define SUNXI_GPIOS_PER_BANK SUNXI_GPIO_A_NR
	26
	27	struct sunxi_gpio_platdata {
	28	struct sunxi_gpio *regs;
	29	const char bank_name; / Name of bank, e.g. "B" */
	30	int gpio_count;
	31	};
	32
	33	#ifndef CONFIG_DM_GPIO
abce2c62 IC	34	static int sunxi_gpio_output(u32 pin, u32 val)
	35	{
	36	u32 dat;
	37	u32 bank = GPIO_BANK(pin);
	38	u32 num = GPIO_NUM(pin);
	39	struct sunxi_gpio *pio = BANK_TO_GPIO(bank);
	40
	41	dat = readl(&pio->dat);
	42	if (val)
	43	dat \|= 0x1 << num;
	44	else
	45	dat &= ~(0x1 << num);
	46
	47	writel(dat, &pio->dat);
	48
	49	return 0;
	50	}
	51
	52	static int sunxi_gpio_input(u32 pin)
	53	{
	54	u32 dat;
	55	u32 bank = GPIO_BANK(pin);
	56	u32 num = GPIO_NUM(pin);
	57	struct sunxi_gpio *pio = BANK_TO_GPIO(bank);
	58
	59	dat = readl(&pio->dat);
	60	dat >>= num;
	61
	62	return dat & 0x1;
	63	}
	64
	65	int gpio_request(unsigned gpio, const char *label)
	66	{
	67	return 0;
	68	}
	69
	70	int gpio_free(unsigned gpio)
	71	{
	72	return 0;
	73	}
	74
	75	int gpio_direction_input(unsigned gpio)
	76	{
	77	sunxi_gpio_set_cfgpin(gpio, SUNXI_GPIO_INPUT);
	78
b0c4ae1a	79	return 0;
abce2c62 IC	80	}
	81
	82	int gpio_direction_output(unsigned gpio, int value)
	83	{
	84	sunxi_gpio_set_cfgpin(gpio, SUNXI_GPIO_OUTPUT);
	85
	86	return sunxi_gpio_output(gpio, value);
	87	}
	88
	89	int gpio_get_value(unsigned gpio)
	90	{
	91	return sunxi_gpio_input(gpio);
	92	}
	93
	94	int gpio_set_value(unsigned gpio, int value)
	95	{
	96	return sunxi_gpio_output(gpio, value);
	97	}
	98
	99	int sunxi_name_to_gpio(const char *name)
	100	{
	101	int group = 0;
	102	int groupsize = 9 * 32;
	103	long pin;
	104	char *eptr;
6c727e09	105
abce2c62 IC	106	if (name == 'P' \|\| name == 'p')
	107	name++;
	108	if (*name >= 'A') {
	109	group = name - (name > 'a' ? 'a' : 'A');
	110	groupsize = 32;
	111	name++;
	112	}
	113
	114	pin = simple_strtol(name, &eptr, 10);
	115	if (!name \|\| eptr)
	116	return -1;
	117	if (pin < 0 \|\| pin > groupsize \|\| group >= 9)
	118	return -1;
	119	return group * 32 + pin;
	120	}
7aa97485 SG	121	#endif
7aa97485 SG	122
746c087b HG	123	int sunxi_name_to_gpio_bank(const char *name)
	124	{
	125	int group = 0;
	126
	127	if (name == 'P' \|\| name == 'p')
	128	name++;
	129	if (*name >= 'A') {
	130	group = name - (name > 'a' ? 'a' : 'A');
	131	return group;
	132	}
	133
	134	return -1;
	135	}
	136
7aa97485	137	#ifdef CONFIG_DM_GPIO
a5ab8838 SG	138	/* TODO([email protected]): Remove this function and use device tree */
	139	int sunxi_name_to_gpio(const char *name)
	140	{
	141	unsigned int gpio;
	142	int ret;
f9b7a04b HG	143	#if !defined CONFIG_SPL_BUILD && defined CONFIG_AXP_GPIO
	144	char lookup[8];
	145
	146	if (strcasecmp(name, "AXP0-VBUS-DETECT") == 0) {
	147	sprintf(lookup, SUNXI_GPIO_AXP0_PREFIX "%d",
	148	SUNXI_GPIO_AXP0_VBUS_DETECT);
	149	name = lookup;
	150	} else if (strcasecmp(name, "AXP0-VBUS-ENABLE") == 0) {
	151	sprintf(lookup, SUNXI_GPIO_AXP0_PREFIX "%d",
	152	SUNXI_GPIO_AXP0_VBUS_ENABLE);
	153	name = lookup;
	154	}
	155	#endif
a5ab8838 SG	156	ret = gpio_lookup_name(name, NULL, NULL, &gpio);
	157
	158	return ret ? ret : gpio;
	159	}
	160
7aa97485 SG	161	static int sunxi_gpio_direction_input(struct udevice *dev, unsigned offset)
	162	{
	163	struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
	164
	165	sunxi_gpio_set_cfgbank(plat->regs, offset, SUNXI_GPIO_INPUT);
	166
	167	return 0;
	168	}
	169
	170	static int sunxi_gpio_direction_output(struct udevice *dev, unsigned offset,
	171	int value)
	172	{
	173	struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
	174	u32 num = GPIO_NUM(offset);
	175
	176	sunxi_gpio_set_cfgbank(plat->regs, offset, SUNXI_GPIO_OUTPUT);
	177	clrsetbits_le32(&plat->regs->dat, 1 << num, value ? (1 << num) : 0);
	178
	179	return 0;
	180	}
	181
	182	static int sunxi_gpio_get_value(struct udevice *dev, unsigned offset)
	183	{
	184	struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
	185	u32 num = GPIO_NUM(offset);
	186	unsigned dat;
	187
	188	dat = readl(&plat->regs->dat);
	189	dat >>= num;
	190
	191	return dat & 0x1;
	192	}
	193
	194	static int sunxi_gpio_set_value(struct udevice *dev, unsigned offset,
	195	int value)
	196	{
	197	struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
	198	u32 num = GPIO_NUM(offset);
	199
	200	clrsetbits_le32(&plat->regs->dat, 1 << num, value ? (1 << num) : 0);
	201	return 0;
	202	}
	203
	204	static int sunxi_gpio_get_function(struct udevice *dev, unsigned offset)
	205	{
	206	struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
	207	int func;
	208
	209	func = sunxi_gpio_get_cfgbank(plat->regs, offset);
	210	if (func == SUNXI_GPIO_OUTPUT)
	211	return GPIOF_OUTPUT;
	212	else if (func == SUNXI_GPIO_INPUT)
	213	return GPIOF_INPUT;
	214	else
	215	return GPIOF_FUNC;
	216	}
	217
	218	static const struct dm_gpio_ops gpio_sunxi_ops = {
	219	.direction_input = sunxi_gpio_direction_input,
	220	.direction_output = sunxi_gpio_direction_output,
	221	.get_value = sunxi_gpio_get_value,
	222	.set_value = sunxi_gpio_set_value,
	223	.get_function = sunxi_gpio_get_function,
	224	};
225
226	/**
227	* Returns the name of a GPIO bank
228	*
229	* GPIO banks are named A, B, C, ...
230	*
231	* @bank: Bank number (0, 1..n-1)
232	* @return allocated string containing the name
233	*/
234	static char *gpio_bank_name(int bank)
235	{
236	char *name;
237
07ce60f3	238	name = malloc(3);
7aa97485	239	if (name) {
07ce60f3 SG	240	name[0] = 'P';
	241	name[1] = 'A' + bank;
	242	name[2] = '\0';
7aa97485 SG	243	}
	244
	245	return name;
	246	}
	247
	248	static int gpio_sunxi_probe(struct udevice *dev)
	249	{
	250	struct sunxi_gpio_platdata *plat = dev_get_platdata(dev);
e564f054	251	struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
7aa97485 SG	252
	253	/* Tell the uclass how many GPIOs we have */
	254	if (plat) {
	255	uc_priv->gpio_count = plat->gpio_count;
	256	uc_priv->bank_name = plat->bank_name;
	257	}
	258
	259	return 0;
	260	}
	261	/**
	262	* We have a top-level GPIO device with no actual GPIOs. It has a child
	263	* device for each Sunxi bank.
	264	*/
	265	static int gpio_sunxi_bind(struct udevice *parent)
	266	{
	267	struct sunxi_gpio_platdata *plat = parent->platdata;
	268	struct sunxi_gpio_reg *ctlr;
fbf10ae9	269	int bank, no_banks, ret, start;
7aa97485 SG	270
	271	/* If this is a child device, there is nothing to do here */
	272	if (plat)
	273	return 0;
	274
fbf10ae9 HG	275	if (fdt_node_check_compatible(gd->fdt_blob, parent->of_offset,
	276	"allwinner,sun6i-a31-r-pinctrl") == 0) {
	277	start = 'L' - 'A';
	278	no_banks = 2; /* L & M */
	279	} else if (fdt_node_check_compatible(gd->fdt_blob, parent->of_offset,
	280	"allwinner,sun8i-a23-r-pinctrl") == 0) {
	281	start = 'L' - 'A';
	282	no_banks = 1; /* L only */
	283	} else {
	284	start = 0;
	285	no_banks = SUNXI_GPIO_BANKS;
	286	}
	287
4e9838c1	288	ctlr = (struct sunxi_gpio_reg *)dev_get_addr(parent);
fbf10ae9	289	for (bank = 0; bank < no_banks; bank++) {
7aa97485 SG	290	struct sunxi_gpio_platdata *plat;
	291	struct udevice *dev;
	292
	293	plat = calloc(1, sizeof(*plat));
	294	if (!plat)
	295	return -ENOMEM;
	296	plat->regs = &ctlr->gpio_bank[bank];
fbf10ae9	297	plat->bank_name = gpio_bank_name(start + bank);
7aa97485 SG	298	plat->gpio_count = SUNXI_GPIOS_PER_BANK;
	299
	300	ret = device_bind(parent, parent->driver,
	301	plat->bank_name, plat, -1, &dev);
	302	if (ret)
	303	return ret;
	304	dev->of_offset = parent->of_offset;
	305	}
	306
	307	return 0;
	308	}
	309
	310	static const struct udevice_id sunxi_gpio_ids[] = {
11d52a9d HG	311	{ .compatible = "allwinner,sun4i-a10-pinctrl" },
	312	{ .compatible = "allwinner,sun5i-a10s-pinctrl" },
	313	{ .compatible = "allwinner,sun5i-a13-pinctrl" },
	314	{ .compatible = "allwinner,sun6i-a31-pinctrl" },
	315	{ .compatible = "allwinner,sun6i-a31s-pinctrl" },
7aa97485	316	{ .compatible = "allwinner,sun7i-a20-pinctrl" },
11d52a9d	317	{ .compatible = "allwinner,sun8i-a23-pinctrl" },
a52783e1	318	{ .compatible = "allwinner,sun8i-a33-pinctrl" },
11d52a9d	319	{ .compatible = "allwinner,sun9i-a80-pinctrl" },
fbf10ae9 HG	320	{ .compatible = "allwinner,sun6i-a31-r-pinctrl" },
fbf10ae9 HG	321	{ .compatible = "allwinner,sun8i-a23-r-pinctrl" },
7aa97485 SG	322	{ }
	323	};
	324
	325	U_BOOT_DRIVER(gpio_sunxi) = {
	326	.name = "gpio_sunxi",
	327	.id = UCLASS_GPIO,
	328	.ops = &gpio_sunxi_ops,
	329	.of_match = sunxi_gpio_ids,
	330	.bind = gpio_sunxi_bind,
	331	.probe = gpio_sunxi_probe,
	332	};
	333	#endif