[people/ms/u-boot.git] / board / toradex / apalis_imx6 / pf0100.c

/*
 * Copyright (C) 2014-2016, Toradex AG
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

/*
 * Helpers for Freescale PMIC PF0100
*/

#include <common.h>
#include <i2c.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/iomux.h>
#include <asm/arch/mx6-pins.h>
#include <asm/gpio.h>
#include <asm/mach-imx/iomux-v3.h>

#include "pf0100_otp.inc"
#include "pf0100.h"

/* define for PMIC register dump */
/*#define DEBUG */

/* use Apalis GPIO1 to switch on VPGM, ON: 1 */
static iomux_v3_cfg_t const pmic_prog_pads[] = {
	MX6_PAD_NANDF_D4__GPIO2_IO04 | MUX_PAD_CTRL(NO_PAD_CTRL),
#	define PMIC_PROG_VOLTAGE IMX_GPIO_NR(2, 4)
};

unsigned pmic_init(void)
{
	unsigned programmed = 0;
	uchar bus = 1;
	uchar devid, revid, val;

	puts("PMIC: ");
	if (!((0 == i2c_set_bus_num(bus)) &&
	      (0 == i2c_probe(PFUZE100_I2C_ADDR)))) {
		puts("i2c bus failed\n");
		return 0;
	}
	/* get device ident */
	if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_DEVICEID, 1, &devid, 1) < 0) {
		puts("i2c pmic devid read failed\n");
		return 0;
	}
	if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_REVID, 1, &revid, 1) < 0) {
		puts("i2c pmic revid read failed\n");
		return 0;
	}
	printf("device id: 0x%.2x, revision id: 0x%.2x\n", devid, revid);

#ifdef DEBUG
	{
		unsigned i, j;

		for (i = 0; i < 16; i++)
			printf("\t%x", i);
		for (j = 0; j < 0x80; ) {
			printf("\n%2x", j);
			for (i = 0; i < 16; i++) {
				i2c_read(PFUZE100_I2C_ADDR, j+i, 1, &val, 1);
				printf("\t%2x", val);
			}
			j += 0x10;
		}
		printf("\nEXT Page 1");

		val = PFUZE100_PAGE_REGISTER_PAGE1;
		if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_PAGE_REGISTER, 1,
			      &val, 1)) {
			puts("i2c write failed\n");
			return 0;
		}

		for (j = 0x80; j < 0x100; ) {
			printf("\n%2x", j);
			for (i = 0; i < 16; i++) {
				i2c_read(PFUZE100_I2C_ADDR, j+i, 1, &val, 1);
				printf("\t%2x", val);
			}
			j += 0x10;
		}
		printf("\nEXT Page 2");

		val = PFUZE100_PAGE_REGISTER_PAGE2;
		if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_PAGE_REGISTER, 1,
			      &val, 1)) {
			puts("i2c write failed\n");
			return 0;
		}

		for (j = 0x80; j < 0x100; ) {
			printf("\n%2x", j);
			for (i = 0; i < 16; i++) {
				i2c_read(PFUZE100_I2C_ADDR, j+i, 1, &val, 1);
				printf("\t%2x", val);
			}
			j += 0x10;
		}
		printf("\n");
	}
#endif
	/* get device programmed state */
	val = PFUZE100_PAGE_REGISTER_PAGE1;
	if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_PAGE_REGISTER, 1, &val, 1)) {
		puts("i2c write failed\n");
		return 0;
	}
	if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_FUSE_POR1, 1, &val, 1) < 0) {
		puts("i2c fuse_por read failed\n");
		return 0;
	}
	if (val & PFUZE100_FUSE_POR_M)
		programmed++;

	if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_FUSE_POR2, 1, &val, 1) < 0) {
		puts("i2c fuse_por read failed\n");
		return programmed;
	}
	if (val & PFUZE100_FUSE_POR_M)
		programmed++;

	if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_FUSE_POR3, 1, &val, 1) < 0) {
		puts("i2c fuse_por read failed\n");
		return programmed;
	}
	if (val & PFUZE100_FUSE_POR_M)
		programmed++;

	switch (programmed) {
	case 0:
		printf("PMIC: not programmed\n");
		break;
	case 3:
		printf("PMIC: programmed\n");
		break;
	default:
		printf("PMIC: undefined programming state\n");
		break;
	}

	/* The following is needed during production */
	if (programmed != 3) {
		/* set VGEN1 to 1.2V */
		val = PFUZE100_VGEN1_VAL;
		if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_VGEN1CTL, 1,
			      &val, 1)) {
			puts("i2c write failed\n");
			return programmed;
		}

		/* set SWBST to 5.0V */
		val = PFUZE100_SWBST_VAL;
		if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_SWBSTCTL, 1,
			      &val, 1)) {
			puts("i2c write failed\n");
		}
	}
	return programmed;
}

int pf0100_prog(void)
{
	unsigned char bus = 1;
	unsigned char val;
	unsigned int i;

	if (pmic_init() == 3) {
		puts("PMIC already programmed, exiting\n");
		return CMD_RET_FAILURE;
	}
	/* set up gpio to manipulate vprog, initially off */
	imx_iomux_v3_setup_multiple_pads(pmic_prog_pads,
					 ARRAY_SIZE(pmic_prog_pads));
	gpio_direction_output(PMIC_PROG_VOLTAGE, 0);

	if (!((0 == i2c_set_bus_num(bus)) &&
	      (0 == i2c_probe(PFUZE100_I2C_ADDR)))) {
		puts("i2c bus failed\n");
		return CMD_RET_FAILURE;
	}

	for (i = 0; i < ARRAY_SIZE(pmic_otp_prog); i++) {
		switch (pmic_otp_prog[i].cmd) {
		case pmic_i2c:
			val = (unsigned char) (pmic_otp_prog[i].value & 0xff);
			if (i2c_write(PFUZE100_I2C_ADDR, pmic_otp_prog[i].reg,
				      1, &val, 1)) {
				printf("i2c write failed, reg 0x%2x, value 0x%2x\n",
				       pmic_otp_prog[i].reg, val);
				return CMD_RET_FAILURE;
			}
			break;
		case pmic_delay:
			udelay(pmic_otp_prog[i].value * 1000);
			break;
		case pmic_vpgm:
			gpio_direction_output(PMIC_PROG_VOLTAGE,
					      pmic_otp_prog[i].value);
			break;
		case pmic_pwr:
			/* TODO */
			break;
		}
	}
	return CMD_RET_SUCCESS;
}

int do_pf0100_prog(cmd_tbl_t *cmdtp, int flag, int argc,
		char * const argv[])
{
	int ret;
	puts("Programming PMIC OTP...");
	ret = pf0100_prog();
	if (ret == CMD_RET_SUCCESS)
		puts("done.\n");
	else
		puts("failed.\n");
	return ret;
}

U_BOOT_CMD(
	pf0100_otp_prog, 1, 0, do_pf0100_prog,
	"Program the OTP fuses on the PMIC PF0100",
	""
);
Commit	Line	Data
592f4aed MK	1	/*
	2	* Copyright (C) 2014-2016, Toradex AG
	3	*
	4	* SPDX-License-Identifier: GPL-2.0+
	5	*/
	6
	7	/*
	8	* Helpers for Freescale PMIC PF0100
	9	*/
	10
	11	#include <common.h>
	12	#include <i2c.h>
	13	#include <asm/arch/imx-regs.h>
	14	#include <asm/arch/iomux.h>
	15	#include <asm/arch/mx6-pins.h>
	16	#include <asm/gpio.h>
552a848e	17	#include <asm/mach-imx/iomux-v3.h>
592f4aed MK	18
	19	#include "pf0100_otp.inc"
	20	#include "pf0100.h"
	21
	22	/* define for PMIC register dump */
	23	/#define DEBUG /
	24
	25	/* use Apalis GPIO1 to switch on VPGM, ON: 1 */
	26	static iomux_v3_cfg_t const pmic_prog_pads[] = {
	27	MX6_PAD_NANDF_D4__GPIO2_IO04 \| MUX_PAD_CTRL(NO_PAD_CTRL),
	28	# define PMIC_PROG_VOLTAGE IMX_GPIO_NR(2, 4)
	29	};
	30
	31	unsigned pmic_init(void)
	32	{
	33	unsigned programmed = 0;
	34	uchar bus = 1;
	35	uchar devid, revid, val;
	36
	37	puts("PMIC: ");
	38	if (!((0 == i2c_set_bus_num(bus)) &&
	39	(0 == i2c_probe(PFUZE100_I2C_ADDR)))) {
	40	puts("i2c bus failed\n");
	41	return 0;
	42	}
	43	/* get device ident */
	44	if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_DEVICEID, 1, &devid, 1) < 0) {
	45	puts("i2c pmic devid read failed\n");
	46	return 0;
	47	}
	48	if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_REVID, 1, &revid, 1) < 0) {
	49	puts("i2c pmic revid read failed\n");
	50	return 0;
	51	}
	52	printf("device id: 0x%.2x, revision id: 0x%.2x\n", devid, revid);
	53
	54	#ifdef DEBUG
	55	{
	56	unsigned i, j;
	57
	58	for (i = 0; i < 16; i++)
	59	printf("\t%x", i);
	60	for (j = 0; j < 0x80; ) {
	61	printf("\n%2x", j);
	62	for (i = 0; i < 16; i++) {
	63	i2c_read(PFUZE100_I2C_ADDR, j+i, 1, &val, 1);
	64	printf("\t%2x", val);
	65	}
	66	j += 0x10;
	67	}
	68	printf("\nEXT Page 1");
	69
	70	val = PFUZE100_PAGE_REGISTER_PAGE1;
	71	if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_PAGE_REGISTER, 1,
	72	&val, 1)) {
	73	puts("i2c write failed\n");
	74	return 0;
	75	}
	76
	77	for (j = 0x80; j < 0x100; ) {
	78	printf("\n%2x", j);
	79	for (i = 0; i < 16; i++) {
	80	i2c_read(PFUZE100_I2C_ADDR, j+i, 1, &val, 1);
	81	printf("\t%2x", val);
82	}
83	j += 0x10;
84	}
85	printf("\nEXT Page 2");
86
87	val = PFUZE100_PAGE_REGISTER_PAGE2;
88	if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_PAGE_REGISTER, 1,
89	&val, 1)) {
90	puts("i2c write failed\n");
91	return 0;
92	}
93
94	for (j = 0x80; j < 0x100; ) {
95	printf("\n%2x", j);
96	for (i = 0; i < 16; i++) {
97	i2c_read(PFUZE100_I2C_ADDR, j+i, 1, &val, 1);
98	printf("\t%2x", val);
99	}
100	j += 0x10;
101	}
102	printf("\n");
103	}
104	#endif
105	/* get device programmed state */
106	val = PFUZE100_PAGE_REGISTER_PAGE1;
107	if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_PAGE_REGISTER, 1, &val, 1)) {
108	puts("i2c write failed\n");
109	return 0;
110	}
111	if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_FUSE_POR1, 1, &val, 1) < 0) {
112	puts("i2c fuse_por read failed\n");
113	return 0;
114	}
115	if (val & PFUZE100_FUSE_POR_M)
116	programmed++;
117
118	if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_FUSE_POR2, 1, &val, 1) < 0) {
119	puts("i2c fuse_por read failed\n");
120	return programmed;
121	}
122	if (val & PFUZE100_FUSE_POR_M)
123	programmed++;
124
125	if (i2c_read(PFUZE100_I2C_ADDR, PFUZE100_FUSE_POR3, 1, &val, 1) < 0) {
126	puts("i2c fuse_por read failed\n");
127	return programmed;
128	}
129	if (val & PFUZE100_FUSE_POR_M)
130	programmed++;
131
132	switch (programmed) {
133	case 0:
134	printf("PMIC: not programmed\n");
135	break;
136	case 3:
137	printf("PMIC: programmed\n");
138	break;
139	default:
140	printf("PMIC: undefined programming state\n");
141	break;
142	}
143
144	/* The following is needed during production */
145	if (programmed != 3) {
146	/* set VGEN1 to 1.2V */
147	val = PFUZE100_VGEN1_VAL;
148	if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_VGEN1CTL, 1,
149	&val, 1)) {
150	puts("i2c write failed\n");
151	return programmed;
152	}
153
154	/* set SWBST to 5.0V */
155	val = PFUZE100_SWBST_VAL;
156	if (i2c_write(PFUZE100_I2C_ADDR, PFUZE100_SWBSTCTL, 1,
157	&val, 1)) {
158	puts("i2c write failed\n");
159	}
160	}
161	return programmed;
162	}
163
164	int pf0100_prog(void)
165	{
166	unsigned char bus = 1;
167	unsigned char val;
168	unsigned int i;
169
170	if (pmic_init() == 3) {
171	puts("PMIC already programmed, exiting\n");
172	return CMD_RET_FAILURE;
173	}
174	/* set up gpio to manipulate vprog, initially off */
175	imx_iomux_v3_setup_multiple_pads(pmic_prog_pads,
176	ARRAY_SIZE(pmic_prog_pads));
177	gpio_direction_output(PMIC_PROG_VOLTAGE, 0);
178
179	if (!((0 == i2c_set_bus_num(bus)) &&
180	(0 == i2c_probe(PFUZE100_I2C_ADDR)))) {
181	puts("i2c bus failed\n");
182	return CMD_RET_FAILURE;
183	}
184
185	for (i = 0; i < ARRAY_SIZE(pmic_otp_prog); i++) {
186	switch (pmic_otp_prog[i].cmd) {
187	case pmic_i2c:
188	val = (unsigned char) (pmic_otp_prog[i].value & 0xff);
189	if (i2c_write(PFUZE100_I2C_ADDR, pmic_otp_prog[i].reg,
190	1, &val, 1)) {
191	printf("i2c write failed, reg 0x%2x, value 0x%2x\n",
192	pmic_otp_prog[i].reg, val);
193	return CMD_RET_FAILURE;
194	}
195	break;
196	case pmic_delay:
197	udelay(pmic_otp_prog[i].value * 1000);
198	break;
199	case pmic_vpgm:
200	gpio_direction_output(PMIC_PROG_VOLTAGE,
201	pmic_otp_prog[i].value);
202	break;
203	case pmic_pwr:
204	/* TODO */
205	break;
206	}
207	}
208	return CMD_RET_SUCCESS;
209	}
210
211	int do_pf0100_prog(cmd_tbl_t *cmdtp, int flag, int argc,
212	char * const argv[])
213	{
214	int ret;
215	puts("Programming PMIC OTP...");
216	ret = pf0100_prog();
217	if (ret == CMD_RET_SUCCESS)
218	puts("done.\n");
219	else
220	puts("failed.\n");
221	return ret;
222	}
223
224	U_BOOT_CMD(
225	pf0100_otp_prog, 1, 0, do_pf0100_prog,
226	"Program the OTP fuses on the PMIC PF0100",
227	""
228	);