Rex-BC Chen | 81a6966 | 2021-11-18 12:44:42 +0800 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 2 | |
| 3 | #include <assert.h> |
| 4 | #include <boardid.h> |
| 5 | #include <console/console.h> |
Rex-BC Chen | 9f6805a | 2021-11-18 18:35:55 +0800 | [diff] [blame] | 6 | #include <ec/google/chromeec/ec.h> |
Rex-BC Chen | 81a6966 | 2021-11-18 12:44:42 +0800 | [diff] [blame] | 7 | #include <soc/auxadc.h> |
| 8 | |
Yidi Lin | cb7c4fd | 2024-01-02 17:33:00 +0800 | [diff] [blame] | 9 | #include "panel.h" |
Ruihai Zhou | d0b13a4 | 2023-03-30 17:54:12 +0800 | [diff] [blame] | 10 | |
Rex-BC Chen | 81a6966 | 2021-11-18 12:44:42 +0800 | [diff] [blame] | 11 | /* board_id is provided by ec/google/chromeec/ec_boardid.c */ |
| 12 | |
| 13 | #define ADC_LEVELS 12 |
| 14 | |
| 15 | enum { |
| 16 | /* RAM IDs */ |
| 17 | RAM_ID_LOW_CHANNEL = 2, |
| 18 | RAM_ID_HIGH_CHANNEL = 3, |
Rex-BC Chen | 9f6805a | 2021-11-18 18:35:55 +0800 | [diff] [blame] | 19 | /* SKU IDs */ |
| 20 | SKU_ID_LOW_CHANNEL = 4, |
| 21 | SKU_ID_HIGH_CHANNEL = 5, |
Rex-BC Chen | 81a6966 | 2021-11-18 12:44:42 +0800 | [diff] [blame] | 22 | }; |
| 23 | |
Ruihai Zhou | d0b13a4 | 2023-03-30 17:54:12 +0800 | [diff] [blame] | 24 | static const unsigned int lcm_voltages[ADC_LEVELS] = { |
| 25 | /* ID : Voltage (unit: uV) */ |
Ruihai Zhou | 060c7c7 | 2023-09-22 10:21:37 +0800 | [diff] [blame] | 26 | [0] = 0, |
| 27 | [1] = 89191, |
| 28 | [2] = 148419, |
| 29 | [3] = 205240, |
| 30 | [4] = 282774, |
| 31 | [5] = 393556, |
| 32 | [6] = 495561, |
| 33 | [7] = 641944, |
| 34 | [8] = 798049, |
| 35 | [9] = 960054, |
| 36 | [10] = 1191264, |
| 37 | [11] = 1433691, |
Ruihai Zhou | d0b13a4 | 2023-03-30 17:54:12 +0800 | [diff] [blame] | 38 | }; |
| 39 | |
Rex-BC Chen | 81a6966 | 2021-11-18 12:44:42 +0800 | [diff] [blame] | 40 | static const unsigned int ram_voltages[ADC_LEVELS] = { |
| 41 | /* ID : Voltage (unit: uV) */ |
| 42 | [0] = 74300, |
| 43 | [1] = 211700, |
| 44 | [2] = 318800, |
| 45 | [3] = 428600, |
| 46 | [4] = 541700, |
| 47 | [5] = 665800, |
| 48 | [6] = 781400, |
| 49 | [7] = 900000, |
| 50 | [8] = 1023100, |
| 51 | [9] = 1137000, |
| 52 | [10] = 1240000, |
| 53 | [11] = 1342600, |
| 54 | }; |
| 55 | |
| 56 | static const unsigned int *adc_voltages[] = { |
| 57 | [RAM_ID_LOW_CHANNEL] = ram_voltages, |
| 58 | [RAM_ID_HIGH_CHANNEL] = ram_voltages, |
Rex-BC Chen | 9f6805a | 2021-11-18 18:35:55 +0800 | [diff] [blame] | 59 | [SKU_ID_LOW_CHANNEL] = ram_voltages, |
| 60 | [SKU_ID_HIGH_CHANNEL] = ram_voltages, |
Rex-BC Chen | 81a6966 | 2021-11-18 12:44:42 +0800 | [diff] [blame] | 61 | }; |
| 62 | |
Ruihai Zhou | d0b13a4 | 2023-03-30 17:54:12 +0800 | [diff] [blame] | 63 | static const unsigned int *adc_voltages_detachable[] = { |
| 64 | [RAM_ID_LOW_CHANNEL] = ram_voltages, |
| 65 | [RAM_ID_HIGH_CHANNEL] = ram_voltages, |
| 66 | [SKU_ID_LOW_CHANNEL] = ram_voltages, |
| 67 | [SKU_ID_HIGH_CHANNEL] = lcm_voltages, |
| 68 | }; |
| 69 | |
Rex-BC Chen | 81a6966 | 2021-11-18 12:44:42 +0800 | [diff] [blame] | 70 | static uint32_t get_adc_index(unsigned int channel) |
| 71 | { |
| 72 | unsigned int value = auxadc_get_voltage_uv(channel); |
Ruihai Zhou | d0b13a4 | 2023-03-30 17:54:12 +0800 | [diff] [blame] | 73 | const unsigned int *voltages; |
Rex-BC Chen | 81a6966 | 2021-11-18 12:44:42 +0800 | [diff] [blame] | 74 | |
Ruihai Zhou | d0b13a4 | 2023-03-30 17:54:12 +0800 | [diff] [blame] | 75 | if (CONFIG(BOARD_GOOGLE_STARYU_COMMON)) { |
| 76 | assert(channel < ARRAY_SIZE(adc_voltages_detachable)); |
| 77 | voltages = adc_voltages_detachable[channel]; |
| 78 | } else { |
| 79 | assert(channel < ARRAY_SIZE(adc_voltages)); |
| 80 | voltages = adc_voltages[channel]; |
| 81 | } |
| 82 | |
Rex-BC Chen | 81a6966 | 2021-11-18 12:44:42 +0800 | [diff] [blame] | 83 | assert(voltages); |
| 84 | |
| 85 | /* Find the closest voltage */ |
| 86 | uint32_t id; |
| 87 | for (id = 0; id < ADC_LEVELS - 1; id++) |
| 88 | if (value < (voltages[id] + voltages[id + 1]) / 2) |
| 89 | break; |
| 90 | |
| 91 | printk(BIOS_DEBUG, "ADC[%u]: Raw value=%u ID=%u\n", channel, value, id); |
| 92 | return id; |
| 93 | } |
| 94 | |
Ruihai Zhou | d0b13a4 | 2023-03-30 17:54:12 +0800 | [diff] [blame] | 95 | /* Detachables use ADC channel 5 for panel ID */ |
| 96 | uint32_t panel_id(void) |
| 97 | { |
| 98 | static uint32_t cached_panel_id = BOARD_ID_INIT; |
| 99 | |
| 100 | if (cached_panel_id == BOARD_ID_INIT) |
| 101 | cached_panel_id = get_adc_index(SKU_ID_HIGH_CHANNEL); |
| 102 | |
| 103 | return cached_panel_id; |
| 104 | } |
| 105 | |
Rex-BC Chen | 9f6805a | 2021-11-18 18:35:55 +0800 | [diff] [blame] | 106 | uint32_t sku_id(void) |
| 107 | { |
| 108 | static uint32_t cached_sku_code = BOARD_ID_INIT; |
| 109 | |
Ruihai Zhou | d0b13a4 | 2023-03-30 17:54:12 +0800 | [diff] [blame] | 110 | if (cached_sku_code != BOARD_ID_INIT) |
| 111 | return cached_sku_code; |
Rex-BC Chen | 9f6805a | 2021-11-18 18:35:55 +0800 | [diff] [blame] | 112 | |
Ruihai Zhou | d0b13a4 | 2023-03-30 17:54:12 +0800 | [diff] [blame] | 113 | cached_sku_code = google_chromeec_get_board_sku(); |
| 114 | |
| 115 | if (CONFIG(BOARD_GOOGLE_STARYU_COMMON)) { |
| 116 | if (cached_sku_code == CROS_SKU_UNPROVISIONED || |
| 117 | cached_sku_code == CROS_SKU_UNKNOWN) { |
| 118 | printk(BIOS_WARNING, "SKU code from EC: %s\n", |
| 119 | (cached_sku_code == CROS_SKU_UNKNOWN) ? |
| 120 | "CROS_SKU_UNKNOWN" : "CROS_SKU_UNPROVISIONED"); |
| 121 | /* Reserve last 4 bits to report PANEL_ID */ |
| 122 | cached_sku_code = 0x7FFFFFF0UL | panel_id(); |
Rex-BC Chen | 9f6805a | 2021-11-18 18:35:55 +0800 | [diff] [blame] | 123 | } |
Ruihai Zhou | d0b13a4 | 2023-03-30 17:54:12 +0800 | [diff] [blame] | 124 | } else if (cached_sku_code == CROS_SKU_UNKNOWN) { |
| 125 | printk(BIOS_WARNING, "Failed to get SKU code from EC\n"); |
| 126 | cached_sku_code = (get_adc_index(SKU_ID_HIGH_CHANNEL) << 4 | |
| 127 | get_adc_index(SKU_ID_LOW_CHANNEL)); |
Rex-BC Chen | 9f6805a | 2021-11-18 18:35:55 +0800 | [diff] [blame] | 128 | } |
| 129 | |
Ruihai Zhou | d0b13a4 | 2023-03-30 17:54:12 +0800 | [diff] [blame] | 130 | printk(BIOS_DEBUG, "SKU Code: %#02x\n", cached_sku_code); |
Rex-BC Chen | 9f6805a | 2021-11-18 18:35:55 +0800 | [diff] [blame] | 131 | return cached_sku_code; |
| 132 | } |
| 133 | |
Rex-BC Chen | 81a6966 | 2021-11-18 12:44:42 +0800 | [diff] [blame] | 134 | uint32_t ram_code(void) |
| 135 | { |
| 136 | static uint32_t cached_ram_code = BOARD_ID_INIT; |
| 137 | |
| 138 | if (cached_ram_code == BOARD_ID_INIT) { |
| 139 | cached_ram_code = (get_adc_index(RAM_ID_HIGH_CHANNEL) << 4 | |
| 140 | get_adc_index(RAM_ID_LOW_CHANNEL)); |
| 141 | printk(BIOS_DEBUG, "RAM Code: %#02x\n", cached_ram_code); |
| 142 | } |
| 143 | |
| 144 | return cached_ram_code; |
| 145 | } |