diff options
Diffstat (limited to 'board/gateworks/venice/eeprom.c')
| -rw-r--r-- | board/gateworks/venice/eeprom.c | 353 |
1 files changed, 353 insertions, 0 deletions
diff --git a/board/gateworks/venice/eeprom.c b/board/gateworks/venice/eeprom.c new file mode 100644 index 0000000000..62b8125960 --- /dev/null +++ b/board/gateworks/venice/eeprom.c @@ -0,0 +1,353 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright 2021 Gateworks Corporation + */ + +#include <common.h> +#include <gsc.h> +#include <hexdump.h> +#include <i2c.h> +#include <dm/uclass.h> + +#include "eeprom.h" + +/* I2C */ +#define SOM_EEPROM_BUSNO 0 +#define SOM_EEPROM_ADDR 0x51 +#define BASEBOARD_EEPROM_BUSNO 1 +#define BASEBOARD_EEPROM_ADDR 0x52 + +struct venice_board_info som_info; +struct venice_board_info base_info; +char venice_model[32]; +u32 venice_serial; + +/* return a mac address from EEPROM info */ +int eeprom_getmac(int index, uint8_t *address) +{ + int i, j; + u32 maclow, machigh; + u64 mac; + + j = 0; + if (som_info.macno) { + maclow = som_info.mac[5]; + maclow |= som_info.mac[4] << 8; + maclow |= som_info.mac[3] << 16; + maclow |= som_info.mac[2] << 24; + machigh = som_info.mac[1]; + machigh |= som_info.mac[0] << 8; + mac = machigh; + mac <<= 32; + mac |= maclow; + for (i = 0; i < som_info.macno; i++, j++) { + if (index == j) + goto out; + } + } + + maclow = base_info.mac[5]; + maclow |= base_info.mac[4] << 8; + maclow |= base_info.mac[3] << 16; + maclow |= base_info.mac[2] << 24; + machigh = base_info.mac[1]; + machigh |= base_info.mac[0] << 8; + mac = machigh; + mac <<= 32; + mac |= maclow; + for (i = 0; i < base_info.macno; i++, j++) { + if (index == j) + goto out; + } + + return -EINVAL; + +out: + mac += i; + address[0] = (mac >> 40) & 0xff; + address[1] = (mac >> 32) & 0xff; + address[2] = (mac >> 24) & 0xff; + address[3] = (mac >> 16) & 0xff; + address[4] = (mac >> 8) & 0xff; + address[5] = (mac >> 0) & 0xff; + + return 0; +} + +static int eeprom_read(int busno, int slave, int alen, struct venice_board_info *info) +{ + int i; + int chksum; + unsigned char *buf = (unsigned char *)info; + struct udevice *dev, *bus; + int ret; + + /* probe device */ + ret = uclass_get_device_by_seq(UCLASS_I2C, busno, &bus); + if (ret) + return ret; + ret = dm_i2c_probe(bus, slave, 0, &dev); + if (ret) + return ret; + + /* read eeprom config section */ + memset(info, 0, sizeof(*info)); + ret = i2c_set_chip_offset_len(dev, alen); + if (ret) { + puts("EEPROM: Failed to set alen\n"); + return ret; + } + ret = dm_i2c_read(dev, 0x00, buf, sizeof(*info)); + if (ret) { + if (slave == SOM_EEPROM_ADDR) + printf("EEPROM: Failed to read EEPROM\n"); + return ret; + } + + /* validate checksum */ + for (chksum = 0, i = 0; i < (int)sizeof(*info) - 2; i++) + chksum += buf[i]; + if ((info->chksum[0] != chksum >> 8) || + (info->chksum[1] != (chksum & 0xff))) { + printf("EEPROM: I2C%d@0x%02x: Invalid Checksum\n", busno, slave); + print_hex_dump_bytes("", DUMP_PREFIX_NONE, buf, sizeof(*info)); + memset(info, 0, sizeof(*info)); + return -EINVAL; + } + + /* sanity check valid model */ + if (info->model[0] != 'G' || info->model[1] != 'W') { + printf("EEPROM: I2C%d@0x%02x: Invalid Model in EEPROM\n", busno, slave); + print_hex_dump_bytes("", DUMP_PREFIX_NONE, buf, sizeof(*info)); + memset(info, 0, sizeof(*info)); + return -EINVAL; + } + + return 0; +} + +/* determine BOM revision from model */ +int get_bom_rev(const char *str) +{ + int rev_bom = 0; + int i; + + for (i = strlen(str) - 1; i > 0; i--) { + if (str[i] == '-') + break; + if (str[i] >= '1' && str[i] <= '9') { + rev_bom = str[i] - '0'; + break; + } + } + return rev_bom; +} + +/* determine PCB revision from model */ +char get_pcb_rev(const char *str) +{ + char rev_pcb = 'A'; + int i; + + for (i = strlen(str) - 1; i > 0; i--) { + if (str[i] == '-') + break; + if (str[i] >= 'A') { + rev_pcb = str[i]; + break; + } + } + return rev_pcb; +} + +/* + * get dt name based on model and detail level: + * + * For boards that are a combination of a SoM plus a Baseboard: + * Venice SoM part numbers are GW70xx where xx is: + * 7000-7019: same PCB with som dt of '0x' + * 7020-7039: same PCB with som dt of '2x' + * 7040-7059: same PCB with som dt of '4x' + * 7060-7079: same PCB with som dt of '6x' + * 7080-7099: same PCB with som dt of '8x' + * Venice Baseboard part numbers are GW7xxx where xxx is: + * 7100-7199: same PCB with base dt of '71xx' + * 7200-7299: same PCB with base dt of '72xx' + * 7300-7399: same PCB with base dt of '73xx' + * 7400-7499: same PCB with base dt of '74xx' + * 7500-7599: same PCB with base dt of '75xx' + * 7600-7699: same PCB with base dt of '76xx' + * 7700-7799: same PCB with base dt of '77xx' + * 7800-7899: same PCB with base dt of '78xx' + * DT name is comprised of: + * gw<base dt>-<som dt>-[base-pcb-rev][base-bom-rev][som-pcb-rev][som-bom-rev] + * + * For board models from 7900-7999 each PCB is unique with its own dt: + * DT name is comprised: + * gw<model>-[pcb-rev][bom-rev] + * + */ +#define snprintfcat(dest, sz, fmt, ...) \ + snprintf((dest) + strlen(dest), (sz) - strlen(dest), fmt, ##__VA_ARGS__) +const char *eeprom_get_dtb_name(int level, char *buf, int sz) +{ +#ifdef CONFIG_IMX8MM + const char *pre = "imx8mm-venice-gw"; +#else + const char *pre = "imx8mn-venice-gw"; +#endif + int model, rev_pcb, rev_bom; + + model = ((som_info.model[2] - '0') * 1000) + + ((som_info.model[3] - '0') * 100) + + ((som_info.model[4] - '0') * 10) + + (som_info.model[5] - '0'); + rev_pcb = tolower(get_pcb_rev(som_info.model)); + rev_bom = get_bom_rev(som_info.model); + + /* som + baseboard*/ + if (base_info.model[0]) { + /* baseboard id: 7100-7199->71; 7200-7299->72; etc */ + int base = ((base_info.model[2] - '0') * 10) + (base_info.model[3] - '0'); + /* som id: 7000-7019->1; 7020-7039->2; etc */ + int som = ((model % 100) / 20) * 2; + int rev_base_pcb = tolower(get_pcb_rev(base_info.model)); + int rev_base_bom = get_bom_rev(base_info.model); + + snprintf(buf, sz, "%s%2dxx-%dx", pre, base, som); + switch (level) { + case 0: /* full model (ie gw73xx-0x-a1a1) */ + if (rev_base_bom) + snprintfcat(buf, sz, "-%c%d", rev_base_pcb, rev_base_bom); + else + snprintfcat(buf, sz, "-%c", rev_base_pcb); + if (rev_bom) + snprintfcat(buf, sz, "%c%d", rev_pcb, rev_bom); + else + snprintfcat(buf, sz, "%c", rev_pcb); + break; + case 1: /* don't care about SoM revision */ + if (rev_base_bom) + snprintfcat(buf, sz, "-%c%d", rev_base_pcb, rev_base_bom); + else + snprintfcat(buf, sz, "-%c", rev_base_pcb); + snprintfcat(buf, sz, "xx"); + break; + case 2: /* don't care about baseboard revision */ + snprintfcat(buf, sz, "-xx"); + if (rev_bom) + snprintfcat(buf, sz, "%c%d", rev_pcb, rev_bom); + else + snprintfcat(buf, sz, "%c", rev_pcb); + break; + case 3: /* don't care about SoM/baseboard revision */ + break; + default: + return NULL; + } + } else { + snprintf(buf, sz, "%s%04d", pre, model); + switch (level) { + case 0: /* full model wth PCB and BOM revision first (ie gw7901-a1) */ + if (rev_bom) + snprintfcat(buf, sz, "-%c%d", rev_pcb, rev_bom); + else + snprintfcat(buf, sz, "-%c", rev_pcb); + break; + case 1: /* don't care about BOM revision */ + snprintfcat(buf, sz, "-%c", rev_pcb); + break; + case 2: /* don't care about PCB or BOM revision */ + break; + default: + return NULL; + } + } + + return buf; +} + +static int eeprom_info(bool verbose) +{ + printf("Model : %s\n", venice_model); + printf("Serial : %d\n", som_info.serial); + printf("MFGDate : %02x-%02x-%02x%02x\n", + som_info.mfgdate[0], som_info.mfgdate[1], + som_info.mfgdate[2], som_info.mfgdate[3]); + if (base_info.model[0] && verbose) { + printf("SOM : %s %d %02x-%02x-%02x%02x\n", + som_info.model, som_info.serial, + som_info.mfgdate[0], som_info.mfgdate[1], + som_info.mfgdate[2], som_info.mfgdate[3]); + printf("BASE : %s %d %02x-%02x-%02x%02x\n", + base_info.model, base_info.serial, + base_info.mfgdate[0], base_info.mfgdate[1], + base_info.mfgdate[2], base_info.mfgdate[3]); + } + + return 0; +} + +int eeprom_init(int quiet) +{ + char rev_pcb; + int rev_bom; + int ret; + + ret = eeprom_read(SOM_EEPROM_BUSNO, SOM_EEPROM_ADDR, 1, &som_info); + if (ret) { + puts("ERROR: Failed to probe EEPROM\n"); + memset(&som_info, 0, sizeof(som_info)); + return 0; + } + + /* read optional baseboard EEPROM */ + eeprom_read(BASEBOARD_EEPROM_BUSNO, BASEBOARD_EEPROM_ADDR, 2, &base_info); + + /* create model strings */ + if (base_info.model[0]) { + sprintf(venice_model, "GW%c%c%c%c-%c%c-", + som_info.model[2], /* family */ + base_info.model[3], /* baseboard */ + base_info.model[4], base_info.model[5], /* subload of baseboard */ + som_info.model[4], som_info.model[5]); /* last 2digits of SOM */ + + /* baseboard revision */ + rev_pcb = get_pcb_rev(base_info.model); + rev_bom = get_bom_rev(base_info.model); + if (rev_bom) + sprintf(venice_model + strlen(venice_model), "%c%d", rev_pcb, rev_bom); + else + sprintf(venice_model + strlen(venice_model), "%c", rev_pcb); + /* som revision */ + rev_pcb = get_pcb_rev(som_info.model); + rev_bom = get_bom_rev(som_info.model); + if (rev_bom) + sprintf(venice_model + strlen(venice_model), "%c%d", rev_pcb, rev_bom); + else + sprintf(venice_model + strlen(venice_model), "%c", rev_pcb); + } else { + strcpy(venice_model, som_info.model); + } + venice_serial = som_info.serial; + + if (!quiet) + eeprom_info(false); + + return (16 << som_info.sdram_size); +} + +void board_gsc_info(void) +{ + eeprom_info(true); +} + +const char *eeprom_get_model(void) +{ + return venice_model; +} + +u32 eeprom_get_serial(void) +{ + return venice_serial; +} |