[people/ms/u-boot.git] / drivers / gpio / mpc83xx_gpio.c

/*
 * Freescale MPC83xx GPIO handling.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <mpc83xx.h>
#include <asm/gpio.h>
#include <asm/io.h>

#ifndef CONFIG_MPC83XX_GPIO_0_INIT_DIRECTION
#define CONFIG_MPC83XX_GPIO_0_INIT_DIRECTION 0
#endif
#ifndef CONFIG_MPC83XX_GPIO_1_INIT_DIRECTION
#define CONFIG_MPC83XX_GPIO_1_INIT_DIRECTION 0
#endif
#ifndef CONFIG_MPC83XX_GPIO_0_INIT_OPEN_DRAIN
#define CONFIG_MPC83XX_GPIO_0_INIT_OPEN_DRAIN 0
#endif
#ifndef CONFIG_MPC83XX_GPIO_1_INIT_OPEN_DRAIN
#define CONFIG_MPC83XX_GPIO_1_INIT_OPEN_DRAIN 0
#endif
#ifndef CONFIG_MPC83XX_GPIO_0_INIT_VALUE
#define CONFIG_MPC83XX_GPIO_0_INIT_VALUE 0
#endif
#ifndef CONFIG_MPC83XX_GPIO_1_INIT_VALUE
#define CONFIG_MPC83XX_GPIO_1_INIT_VALUE 0
#endif

static unsigned int gpio_output_value[MPC83XX_GPIO_CTRLRS];

/*
 * Generic_GPIO primitives.
 */

int gpio_request(unsigned gpio, const char *label)
{
	if (gpio >= MAX_NUM_GPIOS)
		return -1;

	return 0;
}

int gpio_free(unsigned gpio)
{
	/* Do not set to input */
	return 0;
}

/* set GPIO pin 'gpio' as an input */
int gpio_direction_input(unsigned gpio)
{
	immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
	unsigned int ctrlr;
	unsigned int line;
	unsigned int line_mask;

	/* 32-bits per controller */
	ctrlr = gpio >> 5;
	line = gpio & (0x1F);

	/* Big endian */
	line_mask = 1 << (31 - line);

	clrbits_be32(&im->gpio[ctrlr].dir, line_mask);

	return 0;
}

/* set GPIO pin 'gpio' as an output, with polarity 'value' */
int gpio_direction_output(unsigned gpio, int value)
{
	immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
	unsigned int ctrlr;
	unsigned int line;
	unsigned int line_mask;

	if (value != 0 && value != 1) {
		printf("Error: Value parameter must be 0 or 1.\n");
		return -1;
	}

	gpio_set_value(gpio, value);

	/* 32-bits per controller */
	ctrlr = gpio >> 5;
	line = gpio & (0x1F);

	/* Big endian */
	line_mask = 1 << (31 - line);

	/* Make the line output */
	setbits_be32(&im->gpio[ctrlr].dir, line_mask);

	return 0;
}

/* read GPIO IN value of pin 'gpio' */
int gpio_get_value(unsigned gpio)
{
	immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
	unsigned int ctrlr;
	unsigned int line;
	unsigned int line_mask;

	/* 32-bits per controller */
	ctrlr = gpio >> 5;
	line = gpio & (0x1F);

	/* Big endian */
	line_mask = 1 << (31 - line);

	/* Read the value and mask off the bit */
	return (in_be32(&im->gpio[ctrlr].dat) & line_mask) != 0;
}

/* write GPIO OUT value to pin 'gpio' */
int gpio_set_value(unsigned gpio, int value)
{
	immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
	unsigned int ctrlr;
	unsigned int line;
	unsigned int line_mask;

	if (value != 0 && value != 1) {
		printf("Error: Value parameter must be 0 or 1.\n");
		return -1;
	}

	/* 32-bits per controller */
	ctrlr = gpio >> 5;
	line = gpio & (0x1F);

	/* Big endian */
	line_mask = 1 << (31 - line);

	/* Update the local output buffer soft copy */
	gpio_output_value[ctrlr] =
		(gpio_output_value[ctrlr] & ~line_mask) | \
			(value ? line_mask : 0);

	/* Write the output */
	out_be32(&im->gpio[ctrlr].dat, gpio_output_value[ctrlr]);

	return 0;
}

/* Configure GPIO registers early */
void mpc83xx_gpio_init_f(void)
{
	immap_t *im = (immap_t *)CONFIG_SYS_IMMR;

#if MPC83XX_GPIO_CTRLRS >= 1
	out_be32(&im->gpio[0].dir, CONFIG_MPC83XX_GPIO_0_INIT_DIRECTION);
	out_be32(&im->gpio[0].odr, CONFIG_MPC83XX_GPIO_0_INIT_OPEN_DRAIN);
	out_be32(&im->gpio[0].dat, CONFIG_MPC83XX_GPIO_0_INIT_VALUE);
	out_be32(&im->gpio[0].ier, 0xFFFFFFFF); /* Clear all events */
	out_be32(&im->gpio[0].imr, 0);
	out_be32(&im->gpio[0].icr, 0);
#endif

#if MPC83XX_GPIO_CTRLRS >= 2
	out_be32(&im->gpio[1].dir, CONFIG_MPC83XX_GPIO_1_INIT_DIRECTION);
	out_be32(&im->gpio[1].odr, CONFIG_MPC83XX_GPIO_1_INIT_OPEN_DRAIN);
	out_be32(&im->gpio[1].dat, CONFIG_MPC83XX_GPIO_1_INIT_VALUE);
	out_be32(&im->gpio[1].ier, 0xFFFFFFFF); /* Clear all events */
	out_be32(&im->gpio[1].imr, 0);
	out_be32(&im->gpio[1].icr, 0);
#endif
}

/* Initialize GPIO soft-copies */
void mpc83xx_gpio_init_r(void)
{
#if MPC83XX_GPIO_CTRLRS >= 1
	gpio_output_value[0] = CONFIG_MPC83XX_GPIO_0_INIT_VALUE;
#endif

#if MPC83XX_GPIO_CTRLRS >= 2
	gpio_output_value[1] = CONFIG_MPC83XX_GPIO_1_INIT_VALUE;
#endif
}
Commit	Line	Data
4b565793 JH	1	/*
	2	* Freescale MPC83xx GPIO handling.
	3	*
1a459660	4	* SPDX-License-Identifier: GPL-2.0+
4b565793 JH	5	*/
	6
	7	#include <common.h>
	8	#include <mpc83xx.h>
	9	#include <asm/gpio.h>
	10	#include <asm/io.h>
	11
	12	#ifndef CONFIG_MPC83XX_GPIO_0_INIT_DIRECTION
	13	#define CONFIG_MPC83XX_GPIO_0_INIT_DIRECTION 0
	14	#endif
	15	#ifndef CONFIG_MPC83XX_GPIO_1_INIT_DIRECTION
	16	#define CONFIG_MPC83XX_GPIO_1_INIT_DIRECTION 0
	17	#endif
	18	#ifndef CONFIG_MPC83XX_GPIO_0_INIT_OPEN_DRAIN
	19	#define CONFIG_MPC83XX_GPIO_0_INIT_OPEN_DRAIN 0
	20	#endif
	21	#ifndef CONFIG_MPC83XX_GPIO_1_INIT_OPEN_DRAIN
	22	#define CONFIG_MPC83XX_GPIO_1_INIT_OPEN_DRAIN 0
	23	#endif
	24	#ifndef CONFIG_MPC83XX_GPIO_0_INIT_VALUE
	25	#define CONFIG_MPC83XX_GPIO_0_INIT_VALUE 0
	26	#endif
	27	#ifndef CONFIG_MPC83XX_GPIO_1_INIT_VALUE
	28	#define CONFIG_MPC83XX_GPIO_1_INIT_VALUE 0
	29	#endif
	30
	31	static unsigned int gpio_output_value[MPC83XX_GPIO_CTRLRS];
	32
	33	/*
	34	* Generic_GPIO primitives.
	35	*/
	36
	37	int gpio_request(unsigned gpio, const char *label)
	38	{
	39	if (gpio >= MAX_NUM_GPIOS)
	40	return -1;
	41
	42	return 0;
	43	}
	44
	45	int gpio_free(unsigned gpio)
	46	{
	47	/* Do not set to input */
	48	return 0;
	49	}
	50
	51	/* set GPIO pin 'gpio' as an input */
	52	int gpio_direction_input(unsigned gpio)
	53	{
	54	immap_t im = (immap_t )CONFIG_SYS_IMMR;
	55	unsigned int ctrlr;
	56	unsigned int line;
	57	unsigned int line_mask;
	58
	59	/* 32-bits per controller */
	60	ctrlr = gpio >> 5;
	61	line = gpio & (0x1F);
	62
	63	/* Big endian */
	64	line_mask = 1 << (31 - line);
	65
	66	clrbits_be32(&im->gpio[ctrlr].dir, line_mask);
	67
	68	return 0;
69	}
70
71	/* set GPIO pin 'gpio' as an output, with polarity 'value' */
72	int gpio_direction_output(unsigned gpio, int value)
73	{
74	immap_t im = (immap_t )CONFIG_SYS_IMMR;
75	unsigned int ctrlr;
76	unsigned int line;
77	unsigned int line_mask;
78
79	if (value != 0 && value != 1) {
80	printf("Error: Value parameter must be 0 or 1.\n");
81	return -1;
82	}
83
84	gpio_set_value(gpio, value);
85
86	/* 32-bits per controller */
87	ctrlr = gpio >> 5;
88	line = gpio & (0x1F);
89
90	/* Big endian */
91	line_mask = 1 << (31 - line);
92
93	/* Make the line output */
94	setbits_be32(&im->gpio[ctrlr].dir, line_mask);
95
96	return 0;
97	}
98
99	/* read GPIO IN value of pin 'gpio' */
100	int gpio_get_value(unsigned gpio)
101	{
102	immap_t im = (immap_t )CONFIG_SYS_IMMR;
103	unsigned int ctrlr;
104	unsigned int line;
105	unsigned int line_mask;
106
107	/* 32-bits per controller */
108	ctrlr = gpio >> 5;
109	line = gpio & (0x1F);
110
111	/* Big endian */
112	line_mask = 1 << (31 - line);
113
114	/* Read the value and mask off the bit */
115	return (in_be32(&im->gpio[ctrlr].dat) & line_mask) != 0;
116	}
117
118	/* write GPIO OUT value to pin 'gpio' */
119	int gpio_set_value(unsigned gpio, int value)
120	{
121	immap_t im = (immap_t )CONFIG_SYS_IMMR;
122	unsigned int ctrlr;
123	unsigned int line;
124	unsigned int line_mask;
125
126	if (value != 0 && value != 1) {
127	printf("Error: Value parameter must be 0 or 1.\n");
128	return -1;
129	}
130
131	/* 32-bits per controller */
132	ctrlr = gpio >> 5;
133	line = gpio & (0x1F);
134
135	/* Big endian */
136	line_mask = 1 << (31 - line);
137
138	/* Update the local output buffer soft copy */
139	gpio_output_value[ctrlr] =
140	(gpio_output_value[ctrlr] & ~line_mask) \| \
141	(value ? line_mask : 0);
142
143	/* Write the output */
144	out_be32(&im->gpio[ctrlr].dat, gpio_output_value[ctrlr]);
145
146	return 0;
147	}
148
149	/* Configure GPIO registers early */
8121d3c5	150	void mpc83xx_gpio_init_f(void)
4b565793 JH	151	{
	152	immap_t im = (immap_t )CONFIG_SYS_IMMR;
	153
	154	#if MPC83XX_GPIO_CTRLRS >= 1
	155	out_be32(&im->gpio[0].dir, CONFIG_MPC83XX_GPIO_0_INIT_DIRECTION);
	156	out_be32(&im->gpio[0].odr, CONFIG_MPC83XX_GPIO_0_INIT_OPEN_DRAIN);
	157	out_be32(&im->gpio[0].dat, CONFIG_MPC83XX_GPIO_0_INIT_VALUE);
	158	out_be32(&im->gpio[0].ier, 0xFFFFFFFF); /* Clear all events */
	159	out_be32(&im->gpio[0].imr, 0);
	160	out_be32(&im->gpio[0].icr, 0);
	161	#endif
	162
	163	#if MPC83XX_GPIO_CTRLRS >= 2
	164	out_be32(&im->gpio[1].dir, CONFIG_MPC83XX_GPIO_1_INIT_DIRECTION);
	165	out_be32(&im->gpio[1].odr, CONFIG_MPC83XX_GPIO_1_INIT_OPEN_DRAIN);
	166	out_be32(&im->gpio[1].dat, CONFIG_MPC83XX_GPIO_1_INIT_VALUE);
	167	out_be32(&im->gpio[1].ier, 0xFFFFFFFF); /* Clear all events */
	168	out_be32(&im->gpio[1].imr, 0);
	169	out_be32(&im->gpio[1].icr, 0);
	170	#endif
	171	}
	172
	173	/* Initialize GPIO soft-copies */
8121d3c5	174	void mpc83xx_gpio_init_r(void)
4b565793 JH	175	{
	176	#if MPC83XX_GPIO_CTRLRS >= 1
	177	gpio_output_value[0] = CONFIG_MPC83XX_GPIO_0_INIT_VALUE;
	178	#endif
	179
	180	#if MPC83XX_GPIO_CTRLRS >= 2
	181	gpio_output_value[1] = CONFIG_MPC83XX_GPIO_1_INIT_VALUE;
	182	#endif
	183	}