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/* Copyright 2015 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.
*/
/* EC for Buddy panel control */
#include "gpio.h"
#include "hooks.h"
#include "i2c.h"
#include "panel.h"
#include "task.h"
#include "timer.h"
#include "util.h"
static int get_panel_id(void)
{
int pin_status = 0;
if (gpio_get_level(GPIO_PANEL_ID1))
pin_status |= 0x01;
if (gpio_get_level(GPIO_PANEL_ID2))
pin_status |= 0x02;
if (gpio_get_level(GPIO_PANEL_ID3))
pin_status |= 0x04;
switch (pin_status) {
case 0x00:
return PANEL_LGC_SLE;
case 0x01:
return PANEL_BOE;
case 0x04:
return PANEL_LGC_SLK;
case 0x07:
return PANEL_NONE;
default:
return PANEL_UNKNOWN;
}
}
static void panel_converter_setting(void)
{
int i;
int panel_id = get_panel_id();
/* Unidentified panel id must not be configured */
ASSERT(panel_id != PANEL_UNKNOWN);
if (panel_id == PANEL_NONE)
return;
if (gpio_get_level(CONFIG_BACKLIGHT_REQ_GPIO)) {
for (i = 0; i < CMD_NUM; i++) {
i2c_write8(I2C_PORT_CONVERT, I2C_ADDR_CONVERT,
converter_cfg_vals[panel_id][i].reg,
converter_cfg_vals[panel_id][i].val);
}
}
}
DECLARE_DEFERRED(panel_converter_setting);
static void update_backlight(void)
{
#ifdef CONFIG_BACKLIGHT_REQ_GPIO
if (gpio_get_level(CONFIG_BACKLIGHT_REQ_GPIO)) {
gpio_set_level(GPIO_ENABLE_BACKLIGHT, 1);
hook_call_deferred(&panel_converter_setting, 200 * MSEC);
} else {
gpio_set_level(GPIO_ENABLE_BACKLIGHT, 0);
}
#endif
}
void backlight_interrupt(enum gpio_signal signal)
{
update_backlight();
}
static void convert_init(void)
{
update_backlight();
#ifdef CONFIG_BACKLIGHT_REQ_GPIO
gpio_enable_interrupt(CONFIG_BACKLIGHT_REQ_GPIO);
#endif
}
DECLARE_HOOK(HOOK_INIT, convert_init, HOOK_PRIO_DEFAULT);
static int i2c_write_block(int port, int addr, uint8_t *data, int size)
{
int rv;
i2c_lock(port, 1);
/* Extend timeout setting to avoid timeout error */
i2c_set_timeout(port, 700 * MSEC);
rv = i2c_xfer(port, addr, data, size, NULL, 0, I2C_XFER_SINGLE);
i2c_set_timeout(port, 0);
i2c_lock(port, 0);
return rv;
}
static int i2c_read_block(int port, int addr, int cmd, uint8_t *buf, int size)
{
int rv;
uint8_t reg;
reg = cmd;
i2c_lock(port, 1);
rv = i2c_xfer(port, addr, ®, 1, buf, size, I2C_XFER_SINGLE);
i2c_lock(port, 0);
return rv;
}
static int flash_transmitter_fw(void)
{
int crc = 0;
int crc_done = 0;
int rv = 0;
int retry = 0;
/* EC program SRAM start */
i2c_write8(I2C_PORT_TRANSM, I2C_ADDR_TRANSM, 0x6F, 0x80);
/* Write FW into transmitter SRAM */
i2c_write8(I2C_PORT_TRANSM, I2C_ADDR_TRANSM, 0x5D, 0x00);
i2c_write8(I2C_PORT_TRANSM, I2C_ADDR_TRANSM, 0x5E, 0x00);
i2c_write_block(I2C_PORT_TRANSM, I2C_ADDR_TRANSM,
(uint8_t *)transmitter_fw, sizeof(transmitter_fw));
/* Setup HW CRC module, verify range from 0x0000 to 0x17FE for 6K FW */
i2c_write8(I2C_PORT_TRANSM, I2C_ADDR_TRANSM, 0x70, 0x00);
i2c_write8(I2C_PORT_TRANSM, I2C_ADDR_TRANSM, 0x71, 0x00);
i2c_write8(I2C_PORT_TRANSM, I2C_ADDR_TRANSM, 0x72, 0x17);
i2c_write8(I2C_PORT_TRANSM, I2C_ADDR_TRANSM, 0x73, 0xFE);
/* HW CRC start */
i2c_write8(I2C_PORT_TRANSM, I2C_ADDR_TRANSM, 0x74, 0x01);
/* Check HW CRC ready */
do {
retry++;
i2c_read8(I2C_PORT_TRANSM, I2C_ADDR_TRANSM, 0x74, &crc_done);
} while ((retry < 3) && (crc_done & 0x02) == 0);
/* Compare HW CRC value with FW CRC (last byte of transmitter FW) */
if (crc_done & 0x02) {
rv = i2c_read8(I2C_PORT_TRANSM, I2C_ADDR_TRANSM, 0x75, &crc);
if (!rv && (crc == transmitter_fw[sizeof(transmitter_fw)-1]))
return EC_SUCCESS;
}
return EC_ERROR_UNKNOWN;
}
static int flash_edid(void)
{
int i;
uint8_t edid_tmp[128];
int panel_id = get_panel_id();
/* Setup */
i2c_write8(I2C_PORT_TRANSM, I2C_ADDR_TRANSM, 0x61, 0x02);
/* Write EDID into transmitter SRAM */
i2c_write8(I2C_PORT_TRANSM, I2C_ADDR_TRANSM, 0x5D, 0x81);
i2c_write8(I2C_PORT_TRANSM, I2C_ADDR_TRANSM, 0x5E, 0x00);
i2c_write_block(I2C_PORT_TRANSM, I2C_ADDR_TRANSM,
(uint8_t *)edid[panel_id], sizeof(edid_tmp) + 1);
/* Read EDID from transmitter to verify */
i2c_write8(I2C_PORT_TRANSM, I2C_ADDR_TRANSM, 0x5D, 0x81);
i2c_write8(I2C_PORT_TRANSM, I2C_ADDR_TRANSM, 0x5E, 0x00);
i2c_read_block(I2C_PORT_TRANSM, I2C_ADDR_TRANSM, 0x5C,
edid_tmp, sizeof(edid_tmp));
/* Verify EDID */
for (i = 0; i < sizeof(edid_tmp); i++) {
if (edid_tmp[i] != edid[panel_id][i+1])
return EC_ERROR_UNKNOWN;
}
return EC_SUCCESS;
}
static void transmitter_reset(void)
{
/* Reset and re-run transmitter */
i2c_write8(I2C_PORT_TRANSM, I2C_ADDR_TRANSM, 0xFD, 0x05);
i2c_write8(I2C_PORT_TRANSM, I2C_ADDR_TRANSM, 0xFC, 0x83);
i2c_write8(I2C_PORT_TRANSM, I2C_ADDR_TRANSM, 0x6F, 0x40);
}
void panel_task(void)
{
int rv;
int retry;
while (1) {
/* Wait for task wake event */
task_wait_event(-1);
/* Delay 50ms to wait transmitter ready */
msleep(50);
retry = 0;
do {
retry++;
rv = flash_transmitter_fw();
} while ((retry < 3) && rv);
if (rv)
return;
retry = 0;
do {
retry++;
rv = flash_edid();
} while ((retry < 3) && rv);
if (rv)
return;
transmitter_reset();
}
}
static void transmitter_power_on(void)
{
task_wake(TASK_ID_PANEL);
}
DECLARE_HOOK(HOOK_CHIPSET_STARTUP, transmitter_power_on, HOOK_PRIO_DEFAULT);
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