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/* SPDX-License-Identifier: GPL-2.0-only */
#include <assert.h>
#include <boardid.h>
#include <console/console.h>
#include <delay.h>
#include <device/i2c_simple.h>
#include <drivers/camera/cros_camera.h>
#include <ec/google/chromeec/ec.h>
#include <soc/auxadc.h>
#include <soc/i2c.h>
#include <soc/pmic_wrap_common.h>
#include <string.h>
/* For CBI un-provisioned/corrupted Flapjack board. */
#define FLAPJACK_UNDEF_SKU_ID 0
#define ADC_LEVELS 12
enum {
LCM_ID_CHANNEL = 2, /* ID of LCD Module on schematics. */
RAM_ID_CHANNEL = 3,
SKU_ID_CHANNEL = 4,
};
static const int ram_voltages[ADC_LEVELS] = {
/* ID : Voltage (unit: uV) */
/* 0 : */ 74000,
/* 1 : */ 212000,
/* 2 : */ 319000,
/* 3 : */ 429000,
/* 4 : */ 542000,
/* 5 : */ 666000,
/* 6 : */ 781000,
/* 7 : */ 900000,
/* 8 : */ 1023000,
/* 9 : */ 1137000,
/* 10 : */ 1240000,
/* 11 : */ 1343000,
};
static const int lcm_voltages[ADC_LEVELS] = {
/* ID : Voltage (unit: uV) */
/* 0 : */ 0,
/* 1 : */ 283000,
/* 2 : */ 394000,
/* 3 : */ 503000,
/* 4 : */ 608000,
/* 5 : */ 712000,
/* 6 : */ 823000,
/* 7 : */ 937000,
/* 8 : */ 1046000,
/* 9 : */ 1155000,
/* 10 : */ 1277000,
/* 11 : */ 1434000,
};
static const int *adc_voltages[] = {
[LCM_ID_CHANNEL] = lcm_voltages,
[RAM_ID_CHANNEL] = ram_voltages,
[SKU_ID_CHANNEL] = ram_voltages, /* SKU ID is sharing RAM voltages. */
};
static uint32_t get_adc_index(unsigned int channel)
{
int value = auxadc_get_voltage(channel);
assert(channel < ARRAY_SIZE(adc_voltages));
const int *voltages = adc_voltages[channel];
assert(voltages);
/* Find the closest voltage */
uint32_t id;
for (id = 0; id < ADC_LEVELS - 1; id++)
if (value < (voltages[id] + voltages[id + 1]) / 2)
break;
printk(BIOS_DEBUG, "ADC[%d]: Raw value=%d ID=%d\n", channel, value, id);
return id;
}
static uint8_t eeprom_random_read(uint8_t bus, uint8_t slave, uint16_t offset,
uint8_t *data, uint16_t len)
{
struct i2c_msg seg[2];
uint8_t address[2];
address[0] = offset >> 8;
address[1] = offset & 0xff;
seg[0].flags = 0;
seg[0].slave = slave;
seg[0].buf = address;
seg[0].len = sizeof(address);
seg[1].flags = I2C_M_RD;
seg[1].slave = slave;
seg[1].buf = data;
seg[1].len = len;
return i2c_transfer(bus, seg, ARRAY_SIZE(seg));
}
/* Regulator for world facing camera. */
#define PMIC_LDO_VCAMIO_CON0 0x1cb0
#define CROS_CAMERA_INFO_OFFSET 0x1f80
#define MT8183_FORMAT 0x8183
#define KODAMA_PID 0x00c7
/* Returns the ID for world facing camera. */
static uint8_t wfc_id(void)
{
if (!CONFIG(BOARD_GOOGLE_KODAMA))
return 0;
int i, ret;
uint8_t bus = 2;
uint8_t dev_addr = 0x50; /* at24c32/64 device address */
struct cros_camera_info data = {0};
const uint16_t sensor_pids[] = {
[0] = 0x5965, /* OV5965 */
[1] = 0x5035, /* GC5035 */
};
mtk_i2c_bus_init(bus);
/* Turn on camera sensor EEPROM */
pwrap_write(PMIC_LDO_VCAMIO_CON0, 0x1);
udelay(270);
ret = eeprom_random_read(bus, dev_addr, CROS_CAMERA_INFO_OFFSET,
(uint8_t *)&data, sizeof(data));
pwrap_write(PMIC_LDO_VCAMIO_CON0, 0x0);
if (ret) {
printk(BIOS_ERR,
"Failed to read from EEPROM; using default WFC id 0\n");
return 0;
}
if (check_cros_camera_info(&data)) {
printk(BIOS_ERR,
"Failed to check camera info; using default WFC id 0\n");
return 0;
}
if (data.data_format != MT8183_FORMAT) {
printk(BIOS_ERR, "Incompatible camera format: %#04x\n",
data.data_format);
return 0;
}
if (data.module_pid != KODAMA_PID) {
printk(BIOS_ERR, "Incompatible module pid: %#04x\n",
data.module_pid);
return 0;
}
printk(BIOS_DEBUG, "Camera sensor pid: %#04x\n", data.sensor_pid);
for (i = 0; i < ARRAY_SIZE(sensor_pids); i++) {
if (data.sensor_pid == sensor_pids[i]) {
printk(BIOS_INFO, "Detected WFC id: %d\n", i);
return i;
}
}
printk(BIOS_WARNING, "Unknown WFC id; using default id 0\n");
return 0;
}
/* board_id is provided by ec/google/chromeec/ec_boardid.c */
uint32_t sku_id(void)
{
static uint32_t cached_sku_id = BOARD_ID_INIT;
if (cached_sku_id != BOARD_ID_INIT)
return cached_sku_id;
/* On Flapjack, getting the SKU via CBI. */
if (CONFIG(BOARD_GOOGLE_FLAPJACK)) {
if (google_chromeec_cbi_get_sku_id(&cached_sku_id))
cached_sku_id = FLAPJACK_UNDEF_SKU_ID;
return cached_sku_id;
}
/* Quirk for Kukui: All Rev1/Sku0 had incorrectly set SKU_ID=1. */
if (CONFIG(BOARD_GOOGLE_KUKUI)) {
if (board_id() == 1) {
cached_sku_id = 0;
return cached_sku_id;
}
}
/*
* The SKU (later used for device tree matching) is combined from:
* World facing camera (WFC) ID.
* ADC2[4bit/H] = straps on LCD module (type of panel).
* ADC4[4bit/L] = SKU ID from board straps.
*/
cached_sku_id = (wfc_id() << 8 |
get_adc_index(LCM_ID_CHANNEL) << 4 |
get_adc_index(SKU_ID_CHANNEL));
return cached_sku_id;
}
uint32_t ram_code(void)
{
static uint32_t cached_ram_code = BOARD_ID_INIT;
if (cached_ram_code == BOARD_ID_INIT) {
cached_ram_code = get_adc_index(RAM_ID_CHANNEL);
/* Model-specific offset - see sdram_configs.c for details. */
cached_ram_code += CONFIG_BOARD_SDRAM_TABLE_OFFSET;
}
return cached_ram_code;
}
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