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/* Copyright (c) 2012 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.
*/
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/io.h>
#include <unistd.h>
#include "comm-host.h"
#include "lightbar.h"
/* Handy tricks */
#define BUILD_ASSERT(cond) ((void)sizeof(char[1 - 2*!(cond)]))
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
#define LB_SIZES(SUBCMD) { \
sizeof(((struct ec_params_lightbar *)0)->SUBCMD) \
+ sizeof(((struct ec_params_lightbar *)0)->cmd), \
sizeof(((struct ec_response_lightbar *)0)->SUBCMD) }
static const struct {
uint8_t insize;
uint8_t outsize;
} lb_command_paramcount[] = {
LB_SIZES(dump),
LB_SIZES(off),
LB_SIZES(on),
LB_SIZES(init),
LB_SIZES(brightness),
LB_SIZES(seq),
LB_SIZES(reg),
LB_SIZES(rgb),
LB_SIZES(get_seq),
LB_SIZES(demo),
LB_SIZES(get_params),
LB_SIZES(set_params)
};
#undef LB_SIZES
static void lb_cmd_noargs(enum lightbar_command cmd)
{
struct ec_params_lightbar param;
struct ec_response_lightbar resp;
param.cmd = cmd;
ec_command(EC_CMD_LIGHTBAR_CMD, 0,
¶m, lb_command_paramcount[param.cmd].insize,
&resp, lb_command_paramcount[param.cmd].outsize);
}
inline void lightbar_off(void)
{
lb_cmd_noargs(LIGHTBAR_CMD_OFF);
}
inline void lightbar_on(void)
{
lb_cmd_noargs(LIGHTBAR_CMD_ON);
}
inline void lightbar_init_vals(void)
{
lb_cmd_noargs(LIGHTBAR_CMD_INIT);
}
void lightbar_brightness(int newval)
{
struct ec_params_lightbar param;
struct ec_response_lightbar resp;
param.cmd = LIGHTBAR_CMD_BRIGHTNESS;
param.brightness.num = newval;
ec_command(EC_CMD_LIGHTBAR_CMD, 0,
¶m, lb_command_paramcount[param.cmd].insize,
&resp, lb_command_paramcount[param.cmd].outsize);
}
void lightbar_sequence(enum lightbar_sequence num)
{
struct ec_params_lightbar param;
struct ec_response_lightbar resp;
param.cmd = LIGHTBAR_CMD_SEQ;
param.seq.num = num;
ec_command(EC_CMD_LIGHTBAR_CMD, 0,
¶m, lb_command_paramcount[param.cmd].insize,
&resp, lb_command_paramcount[param.cmd].outsize);
}
void lightbar_reg(uint8_t ctrl, uint8_t reg, uint8_t val)
{
struct ec_params_lightbar param;
struct ec_response_lightbar resp;
param.cmd = LIGHTBAR_CMD_REG;
param.reg.ctrl = ctrl;
param.reg.reg = reg;
param.reg.value = val;
ec_command(EC_CMD_LIGHTBAR_CMD, 0,
¶m, lb_command_paramcount[param.cmd].insize,
&resp, lb_command_paramcount[param.cmd].outsize);
}
void lightbar_rgb(int led, int red, int green, int blue)
{
struct ec_params_lightbar param;
struct ec_response_lightbar resp;
param.cmd = LIGHTBAR_CMD_RGB;
param.rgb.led = led;
param.rgb.red = red;
param.rgb.green = green;
param.rgb.blue = blue;
ec_command(EC_CMD_LIGHTBAR_CMD, 0,
¶m, lb_command_paramcount[param.cmd].insize,
&resp, lb_command_paramcount[param.cmd].outsize);
}
void wait_for_ec_to_stop(void)
{
int r;
struct ec_params_lightbar param;
struct ec_response_lightbar resp;
int count = 0;
do {
usleep(100000);
param.cmd = LIGHTBAR_CMD_GET_SEQ;
r = ec_command(EC_CMD_LIGHTBAR_CMD, 0,
¶m,
lb_command_paramcount[param.cmd].insize,
&resp,
lb_command_paramcount[param.cmd].outsize);
if (count++ > 10) {
fprintf(stderr, "EC isn't responding\n");
exit(1);
}
} while (r < 0 && resp.get_seq.num != LIGHTBAR_STOP);
}
int main(int argc, char **argv)
{
int i;
BUILD_ASSERT(ARRAY_SIZE(lb_command_paramcount) == LIGHTBAR_NUM_CMDS);
if (comm_init() < 0)
return -3;
/* Tell the EC to let us drive. */
lightbar_sequence(LIGHTBAR_STOP);
/* Wait until it's listening */
wait_for_ec_to_stop();
/* Initialize it */
lightbar_off();
lightbar_init_vals();
lightbar_brightness(0xff);
lightbar_on();
/* Play a bit */
for (i = 0; i <= 255; i += 4) {
lightbar_rgb(4, 0, i, 0);
usleep(100000);
}
for (; i >= 0; i -= 4) {
lightbar_rgb(4, i, 0, 0);
usleep(100000);
}
/* Let the EC drive again */
lightbar_sequence(LIGHTBAR_RUN);
return 0;
}
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