src/mainboard/google/kukui/boardid.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 /*
   4  * The boardid.c should provide board_id, sku_id, and ram_code.
   5  * board_id is provided by ec/google/chromeec/ec_boardid.c.
   6  * sku_id and ram_code are defined in this file.
   7  */
   8
   9 #include <assert.h>
  10 #include <boardid.h>
  11 #include <console/console.h>
  12 #include <delay.h>
  13 #include <device/i2c_simple.h>
  14 #include <drivers/camera/cros_camera.h>
  15 #include <ec/google/chromeec/ec.h>
  16 #include <soc/auxadc_common.h>
  17 #include <soc/i2c.h>
  18 #include <soc/pmic_wrap_common.h>
  19
  20 /* For CBI un-provisioned/corrupted Flapjack board. */
  21 #define FLAPJACK_UNDEF_SKU_ID 0
  22
  23 #define ADC_LEVELS 12
  24
  25 enum {
  26         LCM_ID_CHANNEL = 2,  /* ID of LCD Module on schematics. */
  27         RAM_ID_CHANNEL = 3,
  28         SKU_ID_CHANNEL = 4,
  29 };
  30
  31 static const int ram_voltages[ADC_LEVELS] = {
  32         /* ID : Voltage (unit: uV) */
  33         /*  0 : */   74000,
  34         /*  1 : */  212000,
  35         /*  2 : */  319000,
  36         /*  3 : */  429000,
  37         /*  4 : */  542000,
  38         /*  5 : */  666000,
  39         /*  6 : */  781000,
  40         /*  7 : */  900000,
  41         /*  8 : */ 1023000,
  42         /*  9 : */ 1137000,
  43         /* 10 : */ 1240000,
  44         /* 11 : */ 1343000,
  45 };
  46
  47 static const int lcm_voltages[ADC_LEVELS] = {
  48         /* ID : Voltage (unit: uV) */
  49         /*  0 : */       0,
  50         /*  1 : */  283000,
  51         /*  2 : */  394000,
  52         /*  3 : */  503000,
  53         /*  4 : */  608000,
  54         /*  5 : */  712000,
  55         /*  6 : */  823000,
  56         /*  7 : */  937000,
  57         /*  8 : */ 1046000,
  58         /*  9 : */ 1155000,
  59         /* 10 : */ 1277000,
  60         /* 11 : */ 1434000,
  61 };
  62
  63 static const int *adc_voltages[] = {
  64         [LCM_ID_CHANNEL] = lcm_voltages,
  65         [RAM_ID_CHANNEL] = ram_voltages,
  66         [SKU_ID_CHANNEL] = ram_voltages, /* SKU ID is sharing RAM voltages. */
  67 };
  68
  69 static uint32_t get_adc_index(unsigned int channel)
  70 {
  71         int value = auxadc_get_voltage_uv(channel);
  72
  73         assert(channel < ARRAY_SIZE(adc_voltages));
  74         const int *voltages = adc_voltages[channel];
  75         assert(voltages);
  76
  77         /* Find the closest voltage */
  78         uint32_t id;
  79         for (id = 0; id < ADC_LEVELS - 1; id++)
  80                 if (value < (voltages[id] + voltages[id + 1]) / 2)
  81                         break;
  82         printk(BIOS_DEBUG, "ADC[%d]: Raw value=%d ID=%d\n", channel, value, id);
  83         return id;
  84 }
  85
  86 static uint8_t eeprom_random_read(uint8_t bus, uint8_t slave, uint16_t offset,
  87                                   uint8_t *data, uint16_t len)
  88 {
  89         struct i2c_msg seg[2];
  90         uint8_t address[2];
  91
  92         address[0] = offset >> 8;
  93         address[1] = offset & 0xff;
  94
  95         seg[0].flags = 0;
  96         seg[0].slave = slave;
  97         seg[0].buf   = address;
  98         seg[0].len   = sizeof(address);
  99         seg[1].flags = I2C_M_RD;
 100         seg[1].slave = slave;
 101         seg[1].buf   = data;
 102         seg[1].len   = len;
 103
 104         return i2c_transfer(bus, seg, ARRAY_SIZE(seg));
 105 }
 106
 107 /* Regulator for world facing camera. */
 108 #define PMIC_LDO_VCAMIO_CON0 0x1cb0
 109
 110 #define CROS_CAMERA_INFO_OFFSET 0x1f80
 111 #define MT8183_FORMAT 0x8183
 112 #define KODAMA_PID 0x00c7
 113
 114 /* Returns the ID for world facing camera. */
 115 static uint8_t wfc_id(void)
 116 {
 117         if (!CONFIG(BOARD_GOOGLE_KODAMA))
 118                 return 0;
 119
 120         int i, ret;
 121         uint8_t bus = 2;
 122         uint8_t dev_addr = 0x50;  /* at24c32/64 device address */
 123
 124         struct cros_camera_info data = {0};
 125
 126         const uint16_t sensor_pids[] = {
 127                 [0] = 0x5965,  /* OV5965 */
 128                 [1] = 0x5035,  /* GC5035 */
 129         };
 130
 131         mtk_i2c_bus_init(bus);
 132
 133         /* Turn on camera sensor EEPROM */
 134         pwrap_write(PMIC_LDO_VCAMIO_CON0, 0x1);
 135         udelay(270);
 136
 137         ret = eeprom_random_read(bus, dev_addr, CROS_CAMERA_INFO_OFFSET,
 138                                  (uint8_t *)&data, sizeof(data));
 139         pwrap_write(PMIC_LDO_VCAMIO_CON0, 0x0);
 140
 141         if (ret) {
 142                 printk(BIOS_ERR,
 143                        "Failed to read from EEPROM; using default WFC id 0\n");
 144                 return 0;
 145         }
 146
 147         if (check_cros_camera_info(&data)) {
 148                 printk(BIOS_ERR,
 149                        "Failed to check camera info; using default WFC id 0\n");
 150                 return 0;
 151         }
 152
 153         if (data.data_format != MT8183_FORMAT) {
 154                 printk(BIOS_ERR, "Incompatible camera format: %#04x\n",
 155                        data.data_format);
 156                 return 0;
 157         }
 158         if (data.module_pid != KODAMA_PID) {
 159                 printk(BIOS_ERR, "Incompatible module pid: %#04x\n",
 160                        data.module_pid);
 161                 return 0;
 162         }
 163
 164         printk(BIOS_DEBUG, "Camera sensor pid: %#04x\n", data.sensor_pid);
 165
 166         for (i = 0; i < ARRAY_SIZE(sensor_pids); i++) {
 167                 if (data.sensor_pid == sensor_pids[i]) {
 168                         printk(BIOS_INFO, "Detected WFC id: %d\n", i);
 169                         return i;
 170                 }
 171         }
 172
 173         printk(BIOS_WARNING, "Unknown WFC id; using default id 0\n");
 174         return 0;
 175 }
 176
 177 /* Returns the ID for LCD module (type of panel). */
 178 static uint8_t lcm_id(void)
 179 {
 180         /* LCM is unused on Jacuzzi followers. */
 181         if (CONFIG(BOARD_GOOGLE_JACUZZI_COMMON))
 182                 return CONFIG_BOARD_OVERRIDE_LCM_ID;
 183
 184         return get_adc_index(LCM_ID_CHANNEL);
 185 }
 186
 187 uint32_t sku_id(void)
 188 {
 189         static uint32_t cached_sku_id = BOARD_ID_INIT;
 190
 191         if (cached_sku_id != BOARD_ID_INIT)
 192                 return cached_sku_id;
 193
 194         /* On Flapjack, getting the SKU via CBI. */
 195         if (CONFIG(BOARD_GOOGLE_FLAPJACK)) {
 196                 if (google_chromeec_cbi_get_sku_id(&cached_sku_id))
 197                         cached_sku_id = FLAPJACK_UNDEF_SKU_ID;
 198                 return cached_sku_id;
 199         }
 200
 201         /* Quirk for Kukui: All Rev1/Sku0 had incorrectly set SKU_ID=1. */
 202         if (CONFIG(BOARD_GOOGLE_KUKUI)) {
 203                 if (board_id() == 1) {
 204                         cached_sku_id = 0;
 205                         return cached_sku_id;
 206                 }
 207         }
 208
 209         /*
 210          * The SKU (later used for device tree matching) is combined from:
 211          * World facing camera (WFC) ID.
 212          * ADC2[4bit/H] = straps on LCD module (type of panel).
 213          * ADC4[4bit/L] = SKU ID from board straps.
 214          */
 215         cached_sku_id = (wfc_id() << 8 |
 216                          lcm_id() << 4 |
 217                          get_adc_index(SKU_ID_CHANNEL));
 218
 219         return cached_sku_id;
 220 }
 221
 222 uint32_t ram_code(void)
 223 {
 224         static uint32_t cached_ram_code = BOARD_ID_INIT;
 225
 226         if (cached_ram_code == BOARD_ID_INIT) {
 227                 cached_ram_code = get_adc_index(RAM_ID_CHANNEL);
 228                 /* Model-specific offset - see sdram_configs.c for details. */
 229                 cached_ram_code += CONFIG_BOARD_SDRAM_TABLE_OFFSET;
 230         }
 231         return cached_ram_code;
 232 }