| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * Copyright (C) 2013 Gateworks Corporation |
| * |
| * Author: Tim Harvey <tharvey@gateworks.com> |
| */ |
| |
| #include <common.h> |
| #include <command.h> |
| #include <log.h> |
| #include <linux/delay.h> |
| #include <linux/errno.h> |
| #include <common.h> |
| #include <i2c.h> |
| #include <linux/ctype.h> |
| |
| #include <asm/arch/sys_proto.h> |
| |
| #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<<GSC_SC_CTRL1_WDEN)) |
| ? "en" : "dis"); |
| if (buf[GSC_SC_STATUS] & (1 << GSC_SC_IRQ_WATCHDOG)) { |
| buf[GSC_SC_STATUS] &= ~(1 << GSC_SC_IRQ_WATCHDOG); |
| puts(" WDT_RESET"); |
| gsc_i2c_write(GSC_SC_ADDR, GSC_SC_STATUS, 1, |
| &buf[GSC_SC_STATUS], 1); |
| } |
| if (!gsc_i2c_read(GSC_HWMON_ADDR, GSC_HWMON_TEMP, 1, buf, 2)) { |
| int ui = buf[0] | buf[1]<<8; |
| if (ui > 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 = simple_strtoul(argv[1], NULL, 10); |
| 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 = simple_strtoul(argv[2], NULL, 10); |
| 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 <secs>]\n" |
| ); |
| |
| #endif /* CONFIG_CMD_GSC */ |