1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 3 #include <assert.h> 4 #include <soc/ramstage.h> 5 #include <types.h> 6 7 union eeprom_dimm_layout { 8 struct __packed { 9 char name[50]; 10 char manufacturer[50]; 11 uint8_t ranks; 12 uint8_t controller_id; 13 uint8_t data_width_bits; 14 uint8_t bus_width_bits; 15 uint32_t capacity_mib; 16 uint32_t max_tdp_milliwatts; 17 }; 18 uint8_t raw[0x80]; 19 }; 20 21 _Static_assert(sizeof(union eeprom_dimm_layout) == 0x80, 22 "union eeprom_dimm_layout has invalid size!"); 23 24 struct __packed eeprom_board_layout { 25 uint32_t signature; 26 union { 27 struct __packed { 28 char cpu_name[50]; 29 uint8_t cpu_count; 30 uint32_t cpu_max_non_turbo_frequency; 31 char pch_name[50]; 32 union eeprom_dimm_layout dimm[4]; 33 }; 34 uint8_t raw_layout[617]; 35 }; 36 }; 37 38 _Static_assert(sizeof(struct eeprom_board_layout) == (617 + sizeof(uint32_t)), 39 "struct eeprom_board_layout has invalid size!"); 40 41 struct __packed eeprom_reset_cause_regs { 42 uint32_t gblrst_cause0; 43 uint32_t gblrst_cause1; 44 uint32_t hpr_cause0; 45 }; 46 47 struct __packed eeprom_board_settings { 48 uint32_t signature; 49 union { 50 struct __packed { 51 uint8_t secureboot; 52 uint8_t primary_video; 53 uint8_t deep_sx_enabled; 54 uint8_t wake_on_usb; 55 uint8_t usb_powered_in_s5; 56 uint8_t power_state_after_g3; 57 uint8_t blue_rear_vref; 58 uint8_t front_panel_audio; 59 uint8_t pxe_boot_capability; 60 uint8_t pink_rear_vref; 61 uint8_t vtx_disabled; 62 uint8_t boot_menu_disabled; 63 }; 64 uint8_t raw_settings[12]; 65 }; 66 }; 67 68 enum { 69 PRIMARY_VIDEO_ASPEED = 0, 70 PRIMARY_VIDEO_INTEL = 1, 71 }; 72 73 _Static_assert(sizeof(struct eeprom_board_settings) == (12 + sizeof(uint32_t)), 74 "struct eeprom_board_settings has invalid size!"); 75 76 struct __packed eeprom_bmc_settings { 77 uint8_t pcie_mux; 78 uint8_t hsi; 79 uint8_t efp3_displayport; 80 }; 81 82 #define HERMES_SN_PN_LENGTH 32 83 84 /* The EEPROM on address 0x57 has the following vendor defined layout: */ 85 struct __packed eeprom_layout { 86 union { 87 uint8_t raw_fspm_upd[0x600]; 88 FSPM_UPD mupd; 89 }; 90 union { 91 uint8_t raw_fsps_upd[0xc00]; 92 FSPS_UPD supd; 93 }; 94 union { 95 uint8_t raw_board_layout[0x400]; 96 struct eeprom_board_layout board_layout; 97 }; 98 char system_serial_number[HERMES_SN_PN_LENGTH]; 99 char board_serial_number[HERMES_SN_PN_LENGTH]; 100 uint8_t boot_order[0x200]; 101 char board_part_number[HERMES_SN_PN_LENGTH]; 102 char product_part_number[HERMES_SN_PN_LENGTH]; 103 union { 104 struct eeprom_reset_cause_regs reset_cause_regs; 105 uint8_t raw_reset_cause_registers[0x80]; 106 }; 107 uint8_t unused[0x600]; 108 union { 109 uint8_t raw_board_settings[0xf8]; 110 struct eeprom_board_settings board_settings; 111 }; 112 union { 113 uint8_t raw_bmc_settings[0x8]; 114 struct eeprom_bmc_settings bmc_settings; 115 }; 116 }; 117 118 _Static_assert(sizeof(FSPM_UPD) <= 0x600, "FSPM_UPD too big"); 119 _Static_assert(sizeof(FSPS_UPD) <= 0xc00, "FSPS_UPD too big"); 120 _Static_assert(sizeof(struct eeprom_layout) == 0x2000, "EEPROM layout size mismatch"); 121 122 bool eeprom_read_buffer(void *blob, size_t read_offset, size_t size); 123 int check_signature(const size_t offset, const uint64_t signature); 124 struct eeprom_board_settings *get_board_settings(void); 125 struct eeprom_bmc_settings *get_bmc_settings(void); 126 const char *eeprom_read_serial(size_t offset, const char *fallback); 127 uint8_t get_bmc_hsi(void); 128 void report_eeprom_error(const size_t off); 129 bool eeprom_write_byte(const uint8_t data, const uint16_t write_offset); 130 bool write_board_settings(const struct eeprom_board_layout *new_layout); 131 132 #define READ_EEPROM(section_type, section_name, dest, opt_name) \ 133 do { \ 134 typeof(dest->opt_name) __tmp; \ 135 size_t __off = offsetof(struct eeprom_layout, section_name); \ 136 bool ret = eeprom_read_buffer(&__tmp, \ 137 __off + offsetof(section_type, opt_name), \ 138 sizeof(__tmp)); \ 139 if (ret) { \ 140 report_eeprom_error(__off + offsetof(section_type, opt_name)); \ 141 } else { \ 142 dest->opt_name = __tmp; \ 143 } \ 144 } while (0) 145 146 #define READ_EEPROM_FSP_M(dest, opt_name) READ_EEPROM(FSPM_UPD, raw_fspm_upd, dest, opt_name) 147 #define READ_EEPROM_FSP_S(dest, opt_name) READ_EEPROM(FSPS_UPD, raw_fsps_upd, dest, opt_name) 148