[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 <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;

	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;

	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(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>
86879d71	17	#include <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;
	25
	26	switch (pmic_i2c_tx_num) {
	27	case 3:
86879d71 ŁM	28	if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG) {
	29	buf[2] = (cpu_to_le32(val) >> 16) & 0xff;
	30	buf[1] = (cpu_to_le32(val) >> 8) & 0xff;
	31	buf[0] = cpu_to_le32(val) & 0xff;
	32	} else {
	33	buf[0] = (cpu_to_le32(val) >> 16) & 0xff;
	34	buf[1] = (cpu_to_le32(val) >> 8) & 0xff;
	35	buf[2] = cpu_to_le32(val) & 0xff;
	36	}
e542b7f0	37	break;
b5bf9caf	38	case 2:
86879d71 ŁM	39	if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG) {
	40	buf[1] = (cpu_to_le32(val) >> 8) & 0xff;
	41	buf[0] = cpu_to_le32(val) & 0xff;
	42	} else {
	43	buf[0] = (cpu_to_le32(val) >> 8) & 0xff;
	44	buf[1] = cpu_to_le32(val) & 0xff;
	45	}
b5bf9caf	46	break;
e542b7f0	47	case 1:
86879d71	48	buf[0] = cpu_to_le32(val) & 0xff;
e542b7f0	49	break;
a22429d2 FE	50	default:
	51	printf("%s: invalid tx_num: %d", __func__, pmic_i2c_tx_num);
	52	return -1;
e542b7f0 ŁM	53	}
	54
	55	if (i2c_write(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num))
	56	return -1;
	57
	58	return 0;
	59	}
	60
	61	int pmic_reg_read(struct pmic p, u32 reg, u32 val)
	62	{
	63	unsigned char buf[4] = { 0 };
	64	u32 ret_val = 0;
	65
c7336815	66	if (check_reg(p, reg))
e542b7f0 ŁM	67	return -1;
	68
	69	if (i2c_read(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num))
	70	return -1;
	71
	72	switch (pmic_i2c_tx_num) {
	73	case 3:
86879d71 ŁM	74	if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG)
	75	ret_val = le32_to_cpu(buf[2] << 16
	76	\| buf[1] << 8 \| buf[0]);
	77	else
	78	ret_val = le32_to_cpu(buf[0] << 16 \|
	79	buf[1] << 8 \| buf[2]);
e542b7f0	80	break;
b5bf9caf	81	case 2:
86879d71 ŁM	82	if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG)
	83	ret_val = le32_to_cpu(buf[1] << 8 \| buf[0]);
	84	else
	85	ret_val = le32_to_cpu(buf[0] << 8 \| buf[1]);
b5bf9caf	86	break;
e542b7f0	87	case 1:
86879d71	88	ret_val = le32_to_cpu(buf[0]);
e542b7f0	89	break;
a22429d2 FE	90	default:
	91	printf("%s: invalid tx_num: %d", __func__, pmic_i2c_tx_num);
	92	return -1;
e542b7f0 ŁM	93	}
	94	memcpy(val, &ret_val, sizeof(ret_val));
	95
	96	return 0;
	97	}
	98
	99	int pmic_probe(struct pmic *p)
	100	{
d69edade	101	I2C_SET_BUS(p->bus);
b5bf9caf	102	debug("Bus: %d PMIC:%s probed!\n", p->bus, p->name);
e542b7f0 ŁM	103	if (i2c_probe(pmic_i2c_addr)) {
	104	printf("Can't find PMIC:%s\n", p->name);
	105	return -1;
	106	}
	107
	108	return 0;
	109	}