text: /* Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
   * Use of this source code is governed by a BSD-style license that can be
   * found in the LICENSE file.
   *
   * TI LP5562 driver.
   */
  
  #include "console.h"
  #include "i2c.h"
  #include "lp5562.h"
  #include "timer.h"
  #include "util.h"
  
  /* 8-bit I2C address */
  #define LP5562_I2C_ADDR (0x30 << 1)
  
  inline int lp5562_write(uint8_t reg, uint8_t val)
  {
  	return i2c_write8(I2C_PORT_MASTER, LP5562_I2C_ADDR, reg, val);
  }
  
  inline int lp5562_read(uint8_t reg, int *val)
  {
  	return i2c_read8(I2C_PORT_MASTER, LP5562_I2C_ADDR, reg, val);
  }
  
  int lp5562_set_color(uint32_t rgb)
  {
  	int ret = 0;
  
  	ret |= lp5562_write(LP5562_REG_B_PWM, rgb & 0xff);
  	ret |= lp5562_write(LP5562_REG_G_PWM, (rgb >> 8) & 0xff);
  	ret |= lp5562_write(LP5562_REG_R_PWM, (rgb >> 16) & 0xff);
  
  	return ret;
  }
  
  int lp5562_set_engine(uint8_t r, uint8_t g, uint8_t b)
  {
  	return lp5562_write(LP5562_REG_LED_MAP, (r << 4) | (g << 2) | b);
  }
  
  int lp5562_engine_load(int engine, const uint8_t *program, int size)
  {
  	int prog_addr = LP5562_REG_ENG_PROG(engine);
  	int i, ret, val;
  	int shift = 6 - engine * 2;
  
  	ret = lp5562_read(LP5562_REG_OP_MODE, &val);
  	if (ret)
  		return ret;
  	val &= ~(0x3 << shift);
  	val |= 0x1 << shift;
  	ret = lp5562_write(LP5562_REG_OP_MODE, val);
  	if (ret)
  		return ret;
  
  	for (i = 0; i < size; ++i) {
  		ret = lp5562_write(prog_addr + i, program[i]);
  		if (ret)
  			return ret;
  	}
  
  	val &= ~(0x3 << shift);
  	val |= 0x2 << shift;
  	ret = lp5562_write(LP5562_REG_OP_MODE, val);
  
  	return ret;
  }
  
  int lp5562_engine_control(int eng1, int eng2, int eng3)
  {
  	int ret, val;
  
  	ret = lp5562_read(LP5562_REG_ENABLE, &val);
  	if (ret)
  		return ret;
  	val &= 0xc0;
  	val |= (eng1 << 4) | (eng2 << 2) | eng3;
  	return lp5562_write(LP5562_REG_ENABLE, val);
  }
  
  int lp5562_get_engine_state(int engine)
  {
  	int val;
  
  	if (lp5562_read(LP5562_REG_ENABLE, &val))
  		return 0xee;
  	return (val >> (6 - engine * 2)) & 0x3;
  }
  
  int lp5562_poweron(void)
  {
  	int ret = 0;
  
  	ret |= lp5562_write(LP5562_REG_ENABLE, 0x40);
  	udelay(500); /* start-up delay */
  
  	ret |= lp5562_write(LP5562_REG_CONFIG, 0x1);
  	ret |= lp5562_write(LP5562_REG_LED_MAP, 0x0);
  
  	return ret;
  }
  
  int lp5562_poweroff(void)
  {
  	return lp5562_write(LP5562_REG_ENABLE, 0x0);
  }
  
  int lp5562_get_pc(int engine)
  {
  	int ret;
  	if (lp5562_read(LP5562_REG_ENG1_PC + engine - 1, &ret))
  		return 0xee;
  	return ret;
  }
  
  int lp5562_set_pc(int engine, int val)
  {
  	return lp5562_write(LP5562_REG_ENG1_PC + engine - 1, val);
  }
  
  /*****************************************************************************/
  /* Console commands */
  #ifdef CONFIG_CMD_POWERLED
  static int command_lp5562(int argc, char **argv)
  {
  	if (argc == 4) {
  		char *e;
  		uint8_t red, green, blue;
  
  		red = strtoi(argv[1], &e, 0);
  		if (e && *e)
  			return EC_ERROR_PARAM1;
  		green = strtoi(argv[2], &e, 0);
  		if (e && *e)
  			return EC_ERROR_PARAM2;
  		blue = strtoi(argv[3], &e, 0);
  		if (e && *e)
  			return EC_ERROR_PARAM3;
  
  		return lp5562_set_color((red << 16) | (green << 8) | blue);
  	} else if (argc == 2) {
  		int v;
  
  		if (!parse_bool(argv[1], &v))
  			return EC_ERROR_PARAM1;
  
  		if (v)
  			return lp5562_poweron();
  		else
  			return lp5562_poweroff();
  	}
  
  	return EC_ERROR_INVAL;
  }
  DECLARE_CONSOLE_COMMAND(lp5562, command_lp5562,
  			"on | off | <red> <green> <blue>",
  			"Set the color of the LED",
  			NULL);
  #endif
  