1 /* 2 * Copyright (C) 2014 Gateworks Corporation 3 * Author: Tim Harvey <tharvey@gateworks.com> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <common.h> 9 #include <errno.h> 10 #include <i2c.h> 11 #include <malloc.h> 12 #include <asm/bitops.h> 13 14 #include "gsc.h" 15 #include "ventana_eeprom.h" 16 17 /* read ventana EEPROM, check for validity, and return baseboard type */ 18 int 19 read_eeprom(int bus, struct ventana_board_info *info) 20 { 21 int i; 22 int chksum; 23 char baseboard; 24 int type; 25 unsigned char *buf = (unsigned char *)info; 26 27 memset(info, 0, sizeof(*info)); 28 29 /* 30 * On a board with a missing/depleted backup battery for GSC, the 31 * board may be ready to probe the GSC before its firmware is 32 * running. We will wait here indefinately for the GSC/EEPROM. 33 */ 34 while (1) { 35 if (0 == i2c_set_bus_num(bus) && 36 0 == i2c_probe(GSC_EEPROM_ADDR)) 37 break; 38 mdelay(1); 39 } 40 41 /* read eeprom config section */ 42 if (gsc_i2c_read(GSC_EEPROM_ADDR, 0x00, 1, buf, sizeof(*info))) { 43 puts("EEPROM: Failed to read EEPROM\n"); 44 return GW_UNKNOWN; 45 } 46 47 /* sanity checks */ 48 if (info->model[0] != 'G' || info->model[1] != 'W') { 49 puts("EEPROM: Invalid Model in EEPROM\n"); 50 return GW_UNKNOWN; 51 } 52 53 /* validate checksum */ 54 for (chksum = 0, i = 0; i < sizeof(*info)-2; i++) 55 chksum += buf[i]; 56 if ((info->chksum[0] != chksum>>8) || 57 (info->chksum[1] != (chksum&0xff))) { 58 puts("EEPROM: Failed EEPROM checksum\n"); 59 return GW_UNKNOWN; 60 } 61 62 /* original GW5400-A prototype */ 63 baseboard = info->model[3]; 64 if (strncasecmp((const char *)info->model, "GW5400-A", 8) == 0) 65 baseboard = '0'; 66 67 switch (baseboard) { 68 case '0': /* original GW5400-A prototype */ 69 type = GW54proto; 70 break; 71 case '1': 72 type = GW51xx; 73 break; 74 case '2': 75 type = GW52xx; 76 break; 77 case '3': 78 type = GW53xx; 79 break; 80 case '4': 81 type = GW54xx; 82 break; 83 default: 84 printf("EEPROM: Unknown model in EEPROM: %s\n", info->model); 85 type = GW_UNKNOWN; 86 break; 87 } 88 return type; 89 } 90 91 /* list of config bits that the bootloader will remove from dtb if not set */ 92 struct ventana_eeprom_config econfig[] = { 93 { "eth0", "ethernet0", EECONFIG_ETH0 }, 94 { "eth1", "ethernet1", EECONFIG_ETH1 }, 95 { "sata", "ahci0", EECONFIG_SATA }, 96 { "pcie", NULL, EECONFIG_PCIE}, 97 { "lvds0", NULL, EECONFIG_LVDS0 }, 98 { "lvds1", NULL, EECONFIG_LVDS1 }, 99 { "usb0", NULL, EECONFIG_USB0 }, 100 { "usb1", NULL, EECONFIG_USB1 }, 101 { "mmc0", NULL, EECONFIG_SD0 }, 102 { "mmc1", NULL, EECONFIG_SD1 }, 103 { "mmc2", NULL, EECONFIG_SD2 }, 104 { "mmc3", NULL, EECONFIG_SD3 }, 105 { "uart0", NULL, EECONFIG_UART0 }, 106 { "uart1", NULL, EECONFIG_UART1 }, 107 { "uart2", NULL, EECONFIG_UART2 }, 108 { "uart3", NULL, EECONFIG_UART3 }, 109 { "uart4", NULL, EECONFIG_UART4 }, 110 { "ipu0", NULL, EECONFIG_IPU0 }, 111 { "ipu1", NULL, EECONFIG_IPU1 }, 112 { "can0", NULL, EECONFIG_FLEXCAN }, 113 { "i2c0", NULL, EECONFIG_I2C0 }, 114 { "i2c1", NULL, EECONFIG_I2C1 }, 115 { "i2c2", NULL, EECONFIG_I2C2 }, 116 { "vpu", NULL, EECONFIG_VPU }, 117 { "csi0", NULL, EECONFIG_CSI0 }, 118 { "csi1", NULL, EECONFIG_CSI1 }, 119 { "spi0", NULL, EECONFIG_ESPCI0 }, 120 { "spi1", NULL, EECONFIG_ESPCI1 }, 121 { "spi2", NULL, EECONFIG_ESPCI2 }, 122 { "spi3", NULL, EECONFIG_ESPCI3 }, 123 { "spi4", NULL, EECONFIG_ESPCI4 }, 124 { "spi5", NULL, EECONFIG_ESPCI5 }, 125 { "gps", "pps", EECONFIG_GPS }, 126 { "hdmi_in", NULL, EECONFIG_HDMI_IN }, 127 { "hdmi_out", NULL, EECONFIG_HDMI_OUT }, 128 { "cvbs_in", NULL, EECONFIG_VID_IN }, 129 { "cvbs_out", NULL, EECONFIG_VID_OUT }, 130 { "nand", NULL, EECONFIG_NAND }, 131 { /* Sentinel */ } 132 }; 133 134 #ifdef CONFIG_CMD_EECONFIG 135 static struct ventana_eeprom_config *get_config(const char *name) 136 { 137 struct ventana_eeprom_config *cfg = econfig; 138 139 while (cfg->name) { 140 if (0 == strcmp(name, cfg->name)) 141 return cfg; 142 cfg++; 143 } 144 return NULL; 145 } 146 147 static u8 econfig_bytes[sizeof(ventana_info.config)]; 148 static int econfig_init = -1; 149 150 int do_econfig(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 151 { 152 struct ventana_eeprom_config *cfg; 153 struct ventana_board_info *info = &ventana_info; 154 int i; 155 156 if (argc < 2) 157 return CMD_RET_USAGE; 158 159 /* initialize */ 160 if (econfig_init != 1) { 161 memcpy(econfig_bytes, info->config, sizeof(econfig_bytes)); 162 econfig_init = 1; 163 } 164 165 /* list configs */ 166 if ((strncmp(argv[1], "list", 4) == 0)) { 167 cfg = econfig; 168 while (cfg->name) { 169 printf("%s: %d\n", cfg->name, 170 test_bit(cfg->bit, econfig_bytes) ? 1 : 0); 171 cfg++; 172 } 173 } 174 175 /* save */ 176 else if ((strncmp(argv[1], "save", 4) == 0)) { 177 unsigned char *buf = (unsigned char *)info; 178 int chksum; 179 180 /* calculate new checksum */ 181 memcpy(info->config, econfig_bytes, sizeof(econfig_bytes)); 182 for (chksum = 0, i = 0; i < sizeof(*info)-2; i++) 183 chksum += buf[i]; 184 debug("old chksum:0x%04x\n", 185 (info->chksum[0] << 8) | info->chksum[1]); 186 debug("new chksum:0x%04x\n", chksum); 187 info->chksum[0] = chksum >> 8; 188 info->chksum[1] = chksum & 0xff; 189 190 /* write new config data */ 191 if (gsc_i2c_write(GSC_EEPROM_ADDR, info->config - (u8 *)info, 192 1, econfig_bytes, sizeof(econfig_bytes))) { 193 printf("EEPROM: Failed updating config\n"); 194 return CMD_RET_FAILURE; 195 } 196 197 /* write new config data */ 198 if (gsc_i2c_write(GSC_EEPROM_ADDR, info->chksum - (u8 *)info, 199 1, info->chksum, 2)) { 200 printf("EEPROM: Failed updating checksum\n"); 201 return CMD_RET_FAILURE; 202 } 203 204 printf("Config saved to EEPROM\n"); 205 } 206 207 /* get config */ 208 else if (argc == 2) { 209 cfg = get_config(argv[1]); 210 if (cfg) { 211 printf("%s: %d\n", cfg->name, 212 test_bit(cfg->bit, econfig_bytes) ? 1 : 0); 213 } else { 214 printf("invalid config: %s\n", argv[1]); 215 return CMD_RET_FAILURE; 216 } 217 } 218 219 /* set config */ 220 else if (argc == 3) { 221 cfg = get_config(argv[1]); 222 if (cfg) { 223 if (simple_strtol(argv[2], NULL, 10)) { 224 test_and_set_bit(cfg->bit, econfig_bytes); 225 printf("Enabled %s\n", cfg->name); 226 } else { 227 test_and_clear_bit(cfg->bit, econfig_bytes); 228 printf("Disabled %s\n", cfg->name); 229 } 230 } else { 231 printf("invalid config: %s\n", argv[1]); 232 return CMD_RET_FAILURE; 233 } 234 } 235 236 else 237 return CMD_RET_USAGE; 238 239 return CMD_RET_SUCCESS; 240 } 241 242 U_BOOT_CMD( 243 econfig, 3, 0, do_econfig, 244 "EEPROM configuration", 245 "list - list config\n" 246 "save - save config to EEPROM\n" 247 "<name> - get config 'name'\n" 248 "<name> [0|1] - set config 'name' to value\n" 249 ); 250 251 #endif /* CONFIG_CMD_EECONFIG */ 252