diff options
Diffstat (limited to 'board/gateworks/venice/gsc.c')
| -rw-r--r-- | board/gateworks/venice/gsc.c | 700 |
1 files changed, 0 insertions, 700 deletions
diff --git a/board/gateworks/venice/gsc.c b/board/gateworks/venice/gsc.c deleted file mode 100644 index 763b89b363..0000000000 --- a/board/gateworks/venice/gsc.c +++ /dev/null @@ -1,700 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * Copyright 2021 Gateworks Corporation - */ - -#include <common.h> -#include <command.h> -#include <hang.h> -#include <hexdump.h> -#include <i2c.h> -#include <linux/delay.h> -#include <dm/uclass.h> - -#include "gsc.h" - -DECLARE_GLOBAL_DATA_PTR; - -struct venice_board_info som_info; -struct venice_board_info base_info; -char venice_model[32]; -uint32_t venice_serial; - -/* return a mac address from EEPROM info */ -int gsc_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; -} - -/* System Controller registers */ -enum { - GSC_SC_CTRL0 = 0, - GSC_SC_CTRL1 = 1, - GSC_SC_STATUS = 10, - GSC_SC_FWCRC = 12, - GSC_SC_FWVER = 14, - GSC_SC_WP = 15, - GSC_SC_RST_CAUSE = 16, - GSC_SC_THERM_PROTECT = 19, -}; - -/* System Controller Control1 bits */ -enum { - GSC_SC_CTRL1_WDTIME = 4, /* 1 = 60s timeout, 0 = 30s timeout */ - GSC_SC_CTRL1_WDEN = 5, /* 1 = enable, 0 = disable */ - GSC_SC_CTRL1_BOOT_CHK = 6, /* 1 = enable alt boot check */ - GSC_SC_CTRL1_WDDIS = 7, /* 1 = disable boot watchdog */ -}; - -/* System Controller Interrupt bits */ -enum { - GSC_SC_IRQ_PB = 0, /* Pushbutton switch */ - GSC_SC_IRQ_SECURE = 1, /* Secure Key erase operation complete */ - GSC_SC_IRQ_EEPROM_WP = 2, /* EEPROM write violation */ - GSC_SC_IRQ_GPIO = 4, /* GPIO change */ - GSC_SC_IRQ_TAMPER = 5, /* Tamper detect */ - GSC_SC_IRQ_WATCHDOG = 6, /* Watchdog trip */ - GSC_SC_IRQ_PBLONG = 7, /* Pushbutton long hold */ -}; - -/* System Controller WP bits */ -enum { - GSC_SC_WP_ALL = 0, /* Write Protect All EEPROM regions */ - GSC_SC_WP_BOARDINFO = 1, /* Write Protect Board Info region */ -}; - -/* System Controller Reset Cause */ -enum { - GSC_SC_RST_CAUSE_VIN = 0, - GSC_SC_RST_CAUSE_PB = 1, - GSC_SC_RST_CAUSE_WDT = 2, - GSC_SC_RST_CAUSE_CPU = 3, - GSC_SC_RST_CAUSE_TEMP_LOCAL = 4, - GSC_SC_RST_CAUSE_TEMP_REMOTE = 5, - GSC_SC_RST_CAUSE_SLEEP = 6, - GSC_SC_RST_CAUSE_BOOT_WDT = 7, - GSC_SC_RST_CAUSE_BOOT_WDT_MAN = 8, - GSC_SC_RST_CAUSE_SOFT_PWR = 9, - GSC_SC_RST_CAUSE_MAX = 10, -}; - -#include <dm/device.h> -static struct udevice *gsc_get_dev(int busno, int slave) -{ - struct udevice *dev, *bus; - int ret; - - ret = uclass_get_device_by_seq(UCLASS_I2C, busno, &bus); - if (ret) { - printf("GSC : failed I2C%d probe: %d\n", busno, ret); - return NULL; - } - ret = dm_i2c_probe(bus, slave, 0, &dev); - if (ret) - return NULL; - - return dev; -} - -static int gsc_read_eeprom(int bus, int slave, int alen, struct venice_board_info *info) -{ - int i; - int chksum; - unsigned char *buf = (unsigned char *)info; - struct udevice *dev; - int ret; - - /* probe device */ - dev = gsc_get_dev(bus, slave); - if (!dev) { - if (slave == GSC_EEPROM_ADDR) - puts("ERROR: Failed to probe EEPROM\n"); - return -ENODEV; - } - - /* 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 == GSC_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", bus, 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", bus, slave); - print_hex_dump_bytes("", DUMP_PREFIX_NONE, buf, sizeof(*info)); - memset(info, 0, sizeof(*info)); - return -EINVAL; - } - - return 0; -} - -static const char *gsc_get_rst_cause(struct udevice *dev) -{ - static char str[64]; - static const char * const names[] = { - "VIN", - "PB", - "WDT", - "CPU", - "TEMP_L", - "TEMP_R", - "SLEEP", - "BOOT_WDT1", - "BOOT_WDT2", - "SOFT_PWR", - }; - unsigned char reg; - - /* reset cause */ - str[0] = 0; - if (!dm_i2c_read(dev, GSC_SC_RST_CAUSE, ®, 1)) { - if (reg < ARRAY_SIZE(names)) - sprintf(str, "%s", names[reg]); - else - sprintf(str, "0x%02x", reg); - } - - /* thermal protection */ - if (!dm_i2c_read(dev, GSC_SC_THERM_PROTECT, ®, 1)) { - strcat(str, " Thermal Protection "); - if (reg & BIT(0)) - strcat(str, "Enabled"); - else - strcat(str, "Disabled"); - } - - return str; -} - -/* display hardware monitor ADC channels */ -int gsc_hwmon(void) -{ - const void *fdt = gd->fdt_blob; - struct udevice *dev; - int node, reg, mode, len, val, offset; - const char *label; - u8 buf[2]; - int ret; - - node = fdt_node_offset_by_compatible(fdt, -1, "gw,gsc-adc"); - if (node <= 0) - return node; - - /* probe device */ - dev = gsc_get_dev(GSC_BUSNO, GSC_HWMON_ADDR); - if (!dev) { - puts("ERROR: Failed to probe GSC HWMON\n"); - return -ENODEV; - } - - /* iterate over hwmon nodes */ - node = fdt_first_subnode(fdt, node); - while (node > 0) { - reg = fdtdec_get_int(fdt, node, "reg", -1); - mode = fdtdec_get_int(fdt, node, "gw,mode", -1); - offset = fdtdec_get_int(fdt, node, "gw,voltage-offset-microvolt", 0); - label = fdt_stringlist_get(fdt, node, "label", 0, NULL); - - if ((reg == -1) || (mode == -1) || !label) - printf("invalid dt:%s\n", fdt_get_name(fdt, node, NULL)); - - memset(buf, 0, sizeof(buf)); - ret = dm_i2c_read(dev, reg, buf, sizeof(buf)); - if (ret) { - printf("i2c error: %d\n", ret); - continue; - } - val = buf[0] | buf[1] << 8; - if (val >= 0) { - const u32 *div; - int r[2]; - - switch (mode) { - case 0: /* temperature (C*10) */ - if (val > 0x8000) - val -= 0xffff; - printf("%-8s: %d.%ldC\n", label, val / 10, abs(val % 10)); - break; - case 1: /* prescaled voltage */ - if (val != 0xffff) - printf("%-8s: %d.%03dV\n", label, val / 1000, val % 1000); - break; - case 2: /* scaled based on ref volt and resolution */ - val *= 2500; - val /= 1 << 12; - - /* apply pre-scaler voltage divider */ - div = fdt_getprop(fdt, node, "gw,voltage-divider-ohms", &len); - if (div && (len == sizeof(uint32_t) * 2)) { - r[0] = fdt32_to_cpu(div[0]); - r[1] = fdt32_to_cpu(div[1]); - if (r[0] && r[1]) { - val *= (r[0] + r[1]); - val /= r[1]; - } - } - - /* adjust by offset */ - val += (offset / 1000); - - printf("%-8s: %d.%03dV\n", label, val / 1000, val % 1000); - break; - } - } - node = fdt_next_subnode(fdt, node); - } - - 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 *gsc_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 gsc_read(void) -{ - char rev_pcb; - int rev_bom; - int ret; - - ret = gsc_read_eeprom(GSC_BUSNO, GSC_EEPROM_ADDR, 1, &som_info); - if (ret) { - memset(&som_info, 0, sizeof(som_info)); - return ret; - } - - /* read optional baseboard EEPROM */ - gsc_read_eeprom(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; - - return 0; -} - -static int gsc_info(int verbose) -{ - struct udevice *dev; - unsigned char buf[16]; - - 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 > 1) { - 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]); - } - - /* Display RTC */ - puts("RTC : "); - dev = gsc_get_dev(GSC_BUSNO, GSC_RTC_ADDR); - if (!dev) { - puts("Failed to probe GSC RTC\n"); - } else { - dm_i2c_read(dev, 0, buf, 6); - printf("%d\n", buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24); - } - - /* Display hwmon */ - gsc_hwmon(); - - return 0; -} - -int gsc_init(int quiet) -{ - unsigned char buf[16]; - struct udevice *dev; - int ret; - - /* - * On a board with a missing/depleted backup battery for GSC, the - * board may be ready to probe the GSC before its firmware is - * running. We will wait here indefinately for the GSC/EEPROM. - */ -#ifdef CONFIG_IMX8MN - // TODO: - // IMX8MN boots quicker than IMX8MM and exposes issue - // where because GSC I2C state machine isn't running and its - // SCL/SDA are driven low spams i2c errors - // - // Put a loop here that somehow waits for I2C CLK/DAT to be high - mdelay(40); -#endif - while (1) { - /* probe device */ - dev = gsc_get_dev(GSC_BUSNO, GSC_SC_ADDR); - if (dev) - break; - mdelay(1); - } - - ret = dm_i2c_read(dev, 0, buf, sizeof(buf)); - if (ret) { - puts("ERROR: Failed reading GSC\n"); - return ret; - } - gsc_read(); - - /* banner */ - if (!quiet) { - printf("GSC : v%d 0x%04x", buf[GSC_SC_FWVER], - buf[GSC_SC_FWCRC] | buf[GSC_SC_FWCRC + 1] << 8); - printf(" RST:%s", gsc_get_rst_cause(dev)); - printf("\n"); - gsc_info(1); - } - - if (ret) - hang(); - - return (16 << som_info.sdram_size); -} - -const char *gsc_get_model(void) -{ - return venice_model; -} - -uint32_t gsc_get_serial(void) -{ - return venice_serial; -} - -#if !(IS_ENABLED(CONFIG_SPL_BUILD)) -static int gsc_sleep(unsigned long secs) -{ - unsigned char reg; - struct udevice *dev; - int ret; - - /* probe device */ - dev = gsc_get_dev(GSC_BUSNO, GSC_SC_ADDR); - if (!dev) - return -ENODEV; - - printf("GSC Sleeping for %ld seconds\n", secs); - reg = (secs >> 24) & 0xff; - ret = dm_i2c_write(dev, 9, ®, 1); - if (ret) - goto err; - reg = (secs >> 16) & 0xff; - ret = dm_i2c_write(dev, 8, ®, 1); - if (ret) - goto err; - reg = (secs >> 8) & 0xff; - ret = dm_i2c_write(dev, 7, ®, 1); - if (ret) - goto err; - reg = secs & 0xff; - ret = dm_i2c_write(dev, 6, ®, 1); - if (ret) - goto err; - ret = dm_i2c_read(dev, GSC_SC_CTRL1, ®, 1); - if (ret) - goto err; - reg |= (1 << 2); - ret = dm_i2c_write(dev, GSC_SC_CTRL1, ®, 1); - if (ret) - goto err; - reg &= ~(1 << 2); - reg |= 0x3; - ret = dm_i2c_write(dev, GSC_SC_CTRL1, ®, 1); - if (ret) - goto err; - - return 0; - -err: - printf("i2c error\n"); - return ret; -} - -static int gsc_boot_wd_disable(void) -{ - u8 reg; - struct udevice *dev; - int ret; - - /* probe device */ - dev = gsc_get_dev(GSC_BUSNO, GSC_SC_ADDR); - if (!dev) - return -ENODEV; - - ret = dm_i2c_read(dev, GSC_SC_CTRL1, ®, 1); - if (ret) - goto err; - reg |= (1 << GSC_SC_CTRL1_WDDIS); - reg &= ~(1 << GSC_SC_CTRL1_BOOT_CHK); - ret = dm_i2c_write(dev, GSC_SC_CTRL1, ®, 1); - if (ret) - goto err; - puts("GSC : boot watchdog disabled\n"); - - return 0; - -err: - printf("i2c error"); - return ret; -} - -static int do_gsc(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[]) -{ - if (argc < 2) - return gsc_info(2); - - if (strcasecmp(argv[1], "sleep") == 0) { - if (argc < 3) - return CMD_RET_USAGE; - if (!gsc_sleep(dectoul(argv[2], NULL))) - return CMD_RET_SUCCESS; - } else if (strcasecmp(argv[1], "hwmon") == 0) { - if (!gsc_hwmon()) - return CMD_RET_SUCCESS; - } else if (strcasecmp(argv[1], "wd-disable") == 0) { - if (!gsc_boot_wd_disable()) - return CMD_RET_SUCCESS; - } - - return CMD_RET_USAGE; -} - -U_BOOT_CMD(gsc, 4, 1, do_gsc, "Gateworks System Controller", - "[sleep <secs>]|[hwmon]|[wd-disable]\n"); -#endif |