// SPDX-License-Identifier: GPL-2.0+ /* * Copyright (C) 2013 Gateworks Corporation * * Author: Tim Harvey */ #include #include #include #include #include #include #include #include #include #include "ventana_eeprom.h" #include "gsc.h" /* * The Gateworks System Controller will fail to ACK a master transaction if * it is busy, which can occur during its 1HZ timer tick while reading ADC's. * When this does occur, it will never be busy long enough to fail more than * 2 back-to-back transfers. Thus we wrap i2c_read and i2c_write with * 3 retries. */ int gsc_i2c_read(uchar chip, uint addr, int alen, uchar *buf, int len) { int retry = 3; int n = 0; int ret; while (n++ < retry) { ret = i2c_read(chip, addr, alen, buf, len); if (!ret) break; debug("%s: 0x%02x 0x%02x retry%d: %d\n", __func__, chip, addr, n, ret); if (ret != -ENODEV) break; mdelay(10); } return ret; } int gsc_i2c_write(uchar chip, uint addr, int alen, uchar *buf, int len) { int retry = 3; int n = 0; int ret; while (n++ < retry) { ret = i2c_write(chip, addr, alen, buf, len); if (!ret) break; debug("%s: 0x%02x 0x%02x retry%d: %d\n", __func__, chip, addr, n, ret); if (ret != -ENODEV) break; mdelay(10); } mdelay(100); return ret; } static void read_hwmon(const char *name, uint reg, uint size) { unsigned char buf[3]; uint ui; printf("%-8s:", name); memset(buf, 0, sizeof(buf)); if (gsc_i2c_read(GSC_HWMON_ADDR, reg, 1, buf, size)) { puts("fRD\n"); } else { ui = buf[0] | (buf[1]<<8) | (buf[2]<<16); if (size == 2 && ui > 0x8000) ui -= 0xffff; if (ui == 0xffffff) puts("invalid\n"); else printf("%d\n", ui); } } int gsc_info(int verbose) { unsigned char buf[16]; i2c_set_bus_num(0); if (gsc_i2c_read(GSC_SC_ADDR, 0, 1, buf, 16)) return CMD_RET_FAILURE; printf("GSC: v%d", buf[GSC_SC_FWVER]); printf(" 0x%04x", buf[GSC_SC_FWCRC] | buf[GSC_SC_FWCRC+1]<<8); printf(" WDT:%sabled", (buf[GSC_SC_CTRL1] & (1< 0x8000) ui -= 0xffff; printf(" board temp at %dC", ui / 10); } puts("\n"); if (!verbose) return CMD_RET_SUCCESS; read_hwmon("Temp", GSC_HWMON_TEMP, 2); read_hwmon("VIN", GSC_HWMON_VIN, 3); read_hwmon("VBATT", GSC_HWMON_VBATT, 3); read_hwmon("VDD_3P3", GSC_HWMON_VDD_3P3, 3); read_hwmon("VDD_ARM", GSC_HWMON_VDD_CORE, 3); read_hwmon("VDD_SOC", GSC_HWMON_VDD_SOC, 3); read_hwmon("VDD_HIGH", GSC_HWMON_VDD_HIGH, 3); read_hwmon("VDD_DDR", GSC_HWMON_VDD_DDR, 3); read_hwmon("VDD_5P0", GSC_HWMON_VDD_5P0, 3); if (strncasecmp((const char*) ventana_info.model, "GW553", 5)) read_hwmon("VDD_2P5", GSC_HWMON_VDD_2P5, 3); read_hwmon("VDD_1P8", GSC_HWMON_VDD_1P8, 3); read_hwmon("VDD_IO2", GSC_HWMON_VDD_IO2, 3); switch (ventana_info.model[3]) { case '1': /* GW51xx */ read_hwmon("VDD_IO3", GSC_HWMON_VDD_IO4, 3); /* -C rev */ break; case '2': /* GW52xx */ break; case '3': /* GW53xx */ read_hwmon("VDD_IO4", GSC_HWMON_VDD_IO4, 3); /* -C rev */ read_hwmon("VDD_GPS", GSC_HWMON_VDD_IO3, 3); break; case '4': /* GW54xx */ read_hwmon("VDD_IO3", GSC_HWMON_VDD_IO4, 3); /* -C rev */ read_hwmon("VDD_GPS", GSC_HWMON_VDD_IO3, 3); break; case '5': /* GW55xx */ break; case '6': /* GW560x */ read_hwmon("VDD_IO4", GSC_HWMON_VDD_IO4, 3); read_hwmon("VDD_GPS", GSC_HWMON_VDD_IO3, 3); break; case '9': /* GW590x */ read_hwmon("AMONBMON", GSC_HWMON_VDD_IO3, 3); read_hwmon("BAT_VOLT", GSC_HWMON_VDD_EXT, 3); read_hwmon("BAT_TEMP", GSC_HWMON_VDD_IO4, 2); } return 0; } /* * The Gateworks System Controller implements a boot * watchdog (always enabled) as a workaround for IMX6 boot related * errata such as: * ERR005768 - no fix scheduled * ERR006282 - fixed in silicon r1.2 * ERR007117 - fixed in silicon r1.3 * ERR007220 - fixed in silicon r1.3 * ERR007926 - no fix scheduled * see http://cache.freescale.com/files/32bit/doc/errata/IMX6DQCE.pdf * * Disable the boot watchdog */ int gsc_boot_wd_disable(void) { u8 reg; i2c_set_bus_num(CONFIG_I2C_GSC); if (!gsc_i2c_read(GSC_SC_ADDR, GSC_SC_CTRL1, 1, ®, 1)) { reg |= (1 << GSC_SC_CTRL1_WDDIS); if (!gsc_i2c_write(GSC_SC_ADDR, GSC_SC_CTRL1, 1, ®, 1)) return 0; } puts("Error: could not disable GSC Watchdog\n"); return 1; } /* 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: */ const char *gsc_get_dtb_name(int level, char *buf, int sz) { const char *model = (const char *)ventana_info.model; const char *pre = is_mx6dq() ? "imx6q-" : "imx6dl-"; int modelno, rev_pcb, rev_bom; /* a few board models are dt equivalents to other models */ if (strncasecmp(model, "gw5906", 6) == 0) model = "gw552x-d"; else if (strncasecmp(model, "gw5908", 6) == 0) model = "gw53xx-f"; else if (strncasecmp(model, "gw5905", 6) == 0) model = "gw5904-a"; modelno = ((model[2] - '0') * 1000) + ((model[3] - '0') * 100) + ((model[4] - '0') * 10) + (model[5] - '0'); rev_pcb = tolower(get_pcb_rev(model)); rev_bom = get_bom_rev(model); /* compare model/rev/bom in order of most specific to least */ snprintf(buf, sz, "%s%04d", pre, modelno); switch (level) { case 0: /* full model first (ie gw5400-a1) */ if (rev_bom) { snprintf(buf, sz, "%sgw%04d-%c%d", pre, modelno, rev_pcb, rev_bom); break; } fallthrough; case 1: /* don't care about bom rev (ie gw5400-a) */ snprintf(buf, sz, "%sgw%04d-%c", pre, modelno, rev_pcb); break; case 2: /* don't care about the pcb rev (ie gw5400) */ snprintf(buf, sz, "%sgw%04d", pre, modelno); break; case 3: /* look for generic model (ie gw540x) */ snprintf(buf, sz, "%sgw%03dx", pre, modelno / 10); break; case 4: /* look for more generic model (ie gw54xx) */ snprintf(buf, sz, "%sgw%02dxx", pre, modelno / 100); break; default: /* give up */ return NULL; } return buf; } #if defined(CONFIG_CMD_GSC) && !defined(CONFIG_SPL_BUILD) static int do_gsc_sleep(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) { unsigned char reg; unsigned long secs = 0; if (argc < 2) return CMD_RET_USAGE; secs = dectoul(argv[1], NULL); printf("GSC Sleeping for %ld seconds\n", secs); i2c_set_bus_num(0); reg = (secs >> 24) & 0xff; if (gsc_i2c_write(GSC_SC_ADDR, 9, 1, ®, 1)) goto error; reg = (secs >> 16) & 0xff; if (gsc_i2c_write(GSC_SC_ADDR, 8, 1, ®, 1)) goto error; reg = (secs >> 8) & 0xff; if (gsc_i2c_write(GSC_SC_ADDR, 7, 1, ®, 1)) goto error; reg = secs & 0xff; if (gsc_i2c_write(GSC_SC_ADDR, 6, 1, ®, 1)) goto error; if (gsc_i2c_read(GSC_SC_ADDR, GSC_SC_CTRL1, 1, ®, 1)) goto error; reg |= (1 << 2); if (gsc_i2c_write(GSC_SC_ADDR, GSC_SC_CTRL1, 1, ®, 1)) goto error; reg &= ~(1 << 2); reg |= 0x3; if (gsc_i2c_write(GSC_SC_ADDR, GSC_SC_CTRL1, 1, ®, 1)) goto error; return CMD_RET_SUCCESS; error: printf("i2c error\n"); return CMD_RET_FAILURE; } static int do_gsc_wd(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) { unsigned char reg; if (argc < 2) return CMD_RET_USAGE; if (strcasecmp(argv[1], "enable") == 0) { int timeout = 0; if (argc > 2) timeout = dectoul(argv[2], NULL); i2c_set_bus_num(0); if (gsc_i2c_read(GSC_SC_ADDR, GSC_SC_CTRL1, 1, ®, 1)) return CMD_RET_FAILURE; reg &= ~((1 << GSC_SC_CTRL1_WDEN) | (1 << GSC_SC_CTRL1_WDTIME)); if (timeout == 60) reg |= (1 << GSC_SC_CTRL1_WDTIME); else timeout = 30; reg |= (1 << GSC_SC_CTRL1_WDEN); if (gsc_i2c_write(GSC_SC_ADDR, GSC_SC_CTRL1, 1, ®, 1)) return CMD_RET_FAILURE; printf("GSC Watchdog enabled with timeout=%d seconds\n", timeout); } else if (strcasecmp(argv[1], "disable") == 0) { i2c_set_bus_num(0); if (gsc_i2c_read(GSC_SC_ADDR, GSC_SC_CTRL1, 1, ®, 1)) return CMD_RET_FAILURE; reg &= ~((1 << GSC_SC_CTRL1_WDEN) | (1 << GSC_SC_CTRL1_WDTIME)); if (gsc_i2c_write(GSC_SC_ADDR, GSC_SC_CTRL1, 1, ®, 1)) return CMD_RET_FAILURE; printf("GSC Watchdog disabled\n"); } else { return CMD_RET_USAGE; } return CMD_RET_SUCCESS; } static int do_gsc(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) { if (argc < 2) return gsc_info(1); if (strcasecmp(argv[1], "wd") == 0) return do_gsc_wd(cmdtp, flag, --argc, ++argv); else if (strcasecmp(argv[1], "sleep") == 0) return do_gsc_sleep(cmdtp, flag, --argc, ++argv); return CMD_RET_USAGE; } U_BOOT_CMD( gsc, 4, 1, do_gsc, "GSC configuration", "[wd enable [30|60]]|[wd disable]|[sleep ]\n" ); #endif /* CONFIG_CMD_GSC */