| Christoph Stoidner | 5b7d701 | 2024-11-20 17:31:42 +0100 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
| 2 | /* |
| 3 | * Copyright (C) 2024 PHYTEC Messtechnik GmbH |
| 4 | * Author: Primoz Fiser <primoz.fiser@norik.com> |
| 5 | */ |
| 6 | |
| 7 | #include <asm/arch/sys_proto.h> |
| 8 | #include <dm/device.h> |
| 9 | #include <dm/uclass.h> |
| 10 | #include <i2c.h> |
| 11 | #include <u-boot/crc.h> |
| 12 | |
| 13 | #include "imx93_som_detection.h" |
| 14 | |
| 15 | extern struct phytec_eeprom_data eeprom_data; |
| 16 | |
| 17 | #if IS_ENABLED(CONFIG_PHYTEC_IMX93_SOM_DETECTION) |
| 18 | |
| 19 | /* Check if the SoM is actually one of the following products: |
| 20 | * - i.MX93 |
| 21 | * |
| 22 | * Returns 0 in case it's a known SoM. Otherwise, returns 1. |
| 23 | */ |
| 24 | u8 __maybe_unused phytec_imx93_detect(struct phytec_eeprom_data *data) |
| 25 | { |
| 26 | u8 som; |
| 27 | |
| 28 | if (!data) |
| 29 | data = &eeprom_data; |
| 30 | |
| 31 | /* Early API revisions are not supported */ |
| 32 | if (!data->valid || data->payload.api_rev < PHYTEC_API_REV2) |
| 33 | return 1; |
| 34 | |
| 35 | som = data->payload.data.data_api2.som_no; |
| 36 | debug("%s: som id: %u\n", __func__, som); |
| 37 | |
| 38 | if (som == PHYTEC_IMX93_SOM && is_imx93()) |
| 39 | return 0; |
| 40 | |
| 41 | pr_err("%s: SoM ID does not match. Wrong EEPROM data?\n", __func__); |
| 42 | return 1; |
| 43 | } |
| 44 | |
| 45 | /* |
| 46 | * Filter PHYTEC i.MX93 SoM options by option index |
| 47 | * |
| 48 | * Returns: |
| 49 | * - option value |
| 50 | * - PHYTEC_EEPROM_INVAL when the data is invalid |
| 51 | * |
| 52 | */ |
| 53 | u8 __maybe_unused phytec_imx93_get_opt(struct phytec_eeprom_data *data, |
| 54 | enum phytec_imx93_option_index idx) |
| 55 | { |
| 56 | char *opt; |
| 57 | u8 opt_id; |
| 58 | |
| 59 | if (!data) |
| 60 | data = &eeprom_data; |
| 61 | |
| 62 | if (!data->valid || data->payload.api_rev < PHYTEC_API_REV2) |
| 63 | return PHYTEC_EEPROM_INVAL; |
| 64 | |
| 65 | opt = phytec_get_opt(data); |
| 66 | if (opt) |
| 67 | opt_id = PHYTEC_GET_OPTION(opt[idx]); |
| 68 | else |
| 69 | opt_id = PHYTEC_EEPROM_INVAL; |
| 70 | |
| 71 | debug("%s: opt[%d] id: %u\n", __func__, idx, opt_id); |
| 72 | return opt_id; |
| 73 | } |
| 74 | |
| 75 | /* |
| 76 | * Filter PHYTEC i.MX93 SoM voltage |
| 77 | * |
| 78 | * Returns: |
| 79 | * - PHYTEC_IMX93_VOLTAGE_1V8 or PHYTEC_IMX93_VOLTAGE_3V3 |
| 80 | * - PHYTEC_EEPROM_INVAL when the data is invalid |
| 81 | * |
| 82 | */ |
| 83 | enum phytec_imx93_voltage __maybe_unused phytec_imx93_get_voltage(struct phytec_eeprom_data *data) |
| 84 | { |
| 85 | u8 option = phytec_imx93_get_opt(data, PHYTEC_IMX93_OPT_FEAT); |
| 86 | |
| 87 | if (option == PHYTEC_EEPROM_INVAL) |
| 88 | return PHYTEC_IMX93_VOLTAGE_INVALID; |
| 89 | return (option & 0x01) ? PHYTEC_IMX93_VOLTAGE_1V8 : PHYTEC_IMX93_VOLTAGE_3V3; |
| 90 | } |
| 91 | |
| 92 | #else |
| 93 | |
| 94 | inline u8 __maybe_unused phytec_imx93_detect(struct phytec_eeprom_data *data) |
| 95 | { |
| 96 | return 1; |
| 97 | } |
| 98 | |
| 99 | inline u8 __maybe_unused phytec_imx93_get_opt(struct phytec_eeprom_data *data, |
| 100 | enum phytec_imx93_option_index idx) |
| 101 | { |
| 102 | return PHYTEC_EEPROM_INVAL; |
| 103 | } |
| 104 | |
| 105 | inline enum phytec_imx93_voltage __maybe_unused phytec_imx93_get_voltage |
| 106 | (struct phytec_eeprom_data *data) |
| 107 | { |
| 108 | return PHYTEC_EEPROM_INVAL; |
| 109 | } |
| 110 | |
| 111 | #endif /* IS_ENABLED(CONFIG_PHYTEC_IMX93_SOM_DETECTION) */ |