[people/ms/u-boot.git] / drivers / power / power_i2c.c

/*
 * Copyright (C) 2011 Samsung Electronics
 * Lukasz Majewski <l.majewski@samsung.com>
 *
 * (C) Copyright 2010
 * Stefano Babic, DENX Software Engineering, sbabic@denx.de
 *
 * (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <linux/types.h>
#include <power/pmic.h>
#include <i2c.h>
#include <linux/compiler.h>

int pmic_reg_write(struct pmic *p, u32 reg, u32 val)
{
	unsigned char buf[4] = { 0 };

	if (check_reg(p, reg))
		return -1;

	I2C_SET_BUS(p->bus);

	switch (pmic_i2c_tx_num) {
	case 3:
		if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG) {
			buf[2] = (cpu_to_le32(val) >> 16) & 0xff;
			buf[1] = (cpu_to_le32(val) >> 8) & 0xff;
			buf[0] = cpu_to_le32(val) & 0xff;
		} else {
			buf[0] = (cpu_to_le32(val) >> 16) & 0xff;
			buf[1] = (cpu_to_le32(val) >> 8) & 0xff;
			buf[2] = cpu_to_le32(val) & 0xff;
		}
		break;
	case 2:
		if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG) {
			buf[1] = (cpu_to_le32(val) >> 8) & 0xff;
			buf[0] = cpu_to_le32(val) & 0xff;
		} else {
			buf[0] = (cpu_to_le32(val) >> 8) & 0xff;
			buf[1] = cpu_to_le32(val) & 0xff;
		}
		break;
	case 1:
		buf[0] = cpu_to_le32(val) & 0xff;
		break;
	default:
		printf("%s: invalid tx_num: %d", __func__, pmic_i2c_tx_num);
		return -1;
	}

	if (i2c_write(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num))
		return -1;

	return 0;
}

int pmic_reg_read(struct pmic *p, u32 reg, u32 *val)
{
	unsigned char buf[4] = { 0 };
	u32 ret_val = 0;

	if (check_reg(p, reg))
		return -1;

	I2C_SET_BUS(p->bus);

	if (i2c_read(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num))
		return -1;

	switch (pmic_i2c_tx_num) {
	case 3:
		if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG)
			ret_val = le32_to_cpu(buf[2] << 16
					      | buf[1] << 8 | buf[0]);
		else
			ret_val = le32_to_cpu(buf[0] << 16 |
					      buf[1] << 8 | buf[2]);
		break;
	case 2:
		if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG)
			ret_val = le32_to_cpu(buf[1] << 8 | buf[0]);
		else
			ret_val = le32_to_cpu(buf[0] << 8 | buf[1]);
		break;
	case 1:
		ret_val = le32_to_cpu(buf[0]);
		break;
	default:
		printf("%s: invalid tx_num: %d", __func__, pmic_i2c_tx_num);
		return -1;
	}
	memcpy(val, &ret_val, sizeof(ret_val));

	return 0;
}

int pmic_probe(struct pmic *p)
{
	i2c_set_bus_num(p->bus);
	debug("Bus: %d PMIC:%s probed!\n", p->bus, p->name);
	if (i2c_probe(pmic_i2c_addr)) {
		printf("Can't find PMIC:%s\n", p->name);
		return -1;
	}

	return 0;
}
Commit	Line	Data
e542b7f0 ŁM	1	/*
	2	* Copyright (C) 2011 Samsung Electronics
	3	* Lukasz Majewski <l.majewski@samsung.com>
	4	*
	5	* (C) Copyright 2010
	6	* Stefano Babic, DENX Software Engineering, sbabic@denx.de
	7	*
	8	* (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
	9	*
1a459660	10	* SPDX-License-Identifier: GPL-2.0+
e542b7f0 ŁM	11	*/
	12
	13	#include <common.h>
	14	#include <linux/types.h>
c7336815	15	#include <power/pmic.h>
e542b7f0	16	#include <i2c.h>
afc366f0	17	#include <linux/compiler.h>
e542b7f0 ŁM	18
	19	int pmic_reg_write(struct pmic *p, u32 reg, u32 val)
	20	{
	21	unsigned char buf[4] = { 0 };
	22
c7336815	23	if (check_reg(p, reg))
e542b7f0 ŁM	24	return -1;
e542b7f0 ŁM	25
0b259dc2 AD	26	I2C_SET_BUS(p->bus);
0b259dc2 AD	27
e542b7f0 ŁM	28	switch (pmic_i2c_tx_num) {
e542b7f0 ŁM	29	case 3:
86879d71 ŁM	30	if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG) {
	31	buf[2] = (cpu_to_le32(val) >> 16) & 0xff;
	32	buf[1] = (cpu_to_le32(val) >> 8) & 0xff;
	33	buf[0] = cpu_to_le32(val) & 0xff;
	34	} else {
	35	buf[0] = (cpu_to_le32(val) >> 16) & 0xff;
	36	buf[1] = (cpu_to_le32(val) >> 8) & 0xff;
	37	buf[2] = cpu_to_le32(val) & 0xff;
	38	}
e542b7f0	39	break;
b5bf9caf	40	case 2:
86879d71 ŁM	41	if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG) {
	42	buf[1] = (cpu_to_le32(val) >> 8) & 0xff;
	43	buf[0] = cpu_to_le32(val) & 0xff;
	44	} else {
	45	buf[0] = (cpu_to_le32(val) >> 8) & 0xff;
	46	buf[1] = cpu_to_le32(val) & 0xff;
	47	}
b5bf9caf	48	break;
e542b7f0	49	case 1:
86879d71	50	buf[0] = cpu_to_le32(val) & 0xff;
e542b7f0	51	break;
a22429d2 FE	52	default:
	53	printf("%s: invalid tx_num: %d", __func__, pmic_i2c_tx_num);
	54	return -1;
e542b7f0 ŁM	55	}
	56
	57	if (i2c_write(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num))
	58	return -1;
	59
	60	return 0;
	61	}
	62
	63	int pmic_reg_read(struct pmic p, u32 reg, u32 val)
	64	{
	65	unsigned char buf[4] = { 0 };
	66	u32 ret_val = 0;
	67
c7336815	68	if (check_reg(p, reg))
e542b7f0 ŁM	69	return -1;
e542b7f0 ŁM	70
0b259dc2 AD	71	I2C_SET_BUS(p->bus);
0b259dc2 AD	72
e542b7f0 ŁM	73	if (i2c_read(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num))
	74	return -1;
	75
	76	switch (pmic_i2c_tx_num) {
	77	case 3:
86879d71 ŁM	78	if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG)
	79	ret_val = le32_to_cpu(buf[2] << 16
	80	\| buf[1] << 8 \| buf[0]);
	81	else
	82	ret_val = le32_to_cpu(buf[0] << 16 \|
	83	buf[1] << 8 \| buf[2]);
e542b7f0	84	break;
b5bf9caf	85	case 2:
86879d71 ŁM	86	if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG)
	87	ret_val = le32_to_cpu(buf[1] << 8 \| buf[0]);
	88	else
	89	ret_val = le32_to_cpu(buf[0] << 8 \| buf[1]);
b5bf9caf	90	break;
e542b7f0	91	case 1:
86879d71	92	ret_val = le32_to_cpu(buf[0]);
e542b7f0	93	break;
a22429d2 FE	94	default:
	95	printf("%s: invalid tx_num: %d", __func__, pmic_i2c_tx_num);
	96	return -1;
e542b7f0 ŁM	97	}
	98	memcpy(val, &ret_val, sizeof(ret_val));
	99
	100	return 0;
	101	}
	102
	103	int pmic_probe(struct pmic *p)
	104	{
3fbb517f	105	i2c_set_bus_num(p->bus);
b5bf9caf	106	debug("Bus: %d PMIC:%s probed!\n", p->bus, p->name);
e542b7f0 ŁM	107	if (i2c_probe(pmic_i2c_addr)) {
	108	printf("Can't find PMIC:%s\n", p->name);
	109	return -1;
	110	}
	111
	112	return 0;
	113	}