159189a8bSTim Harvey /* 259189a8bSTim Harvey * Copyright (C) 2013 Gateworks Corporation 359189a8bSTim Harvey * 459189a8bSTim Harvey * Author: Tim Harvey <tharvey@gateworks.com> 559189a8bSTim Harvey * 659189a8bSTim Harvey * SPDX-License-Identifier: GPL-2.0+ 759189a8bSTim Harvey */ 859189a8bSTim Harvey 91221ce45SMasahiro Yamada #include <linux/errno.h> 1059189a8bSTim Harvey #include <common.h> 1159189a8bSTim Harvey #include <i2c.h> 1259189a8bSTim Harvey #include <linux/ctype.h> 1359189a8bSTim Harvey 14a419352dSTim Harvey #include "ventana_eeprom.h" 1559189a8bSTim Harvey #include "gsc.h" 1659189a8bSTim Harvey 1759189a8bSTim Harvey /* 1859189a8bSTim Harvey * The Gateworks System Controller will fail to ACK a master transaction if 1959189a8bSTim Harvey * it is busy, which can occur during its 1HZ timer tick while reading ADC's. 2059189a8bSTim Harvey * When this does occur, it will never be busy long enough to fail more than 2159189a8bSTim Harvey * 2 back-to-back transfers. Thus we wrap i2c_read and i2c_write with 2259189a8bSTim Harvey * 3 retries. 2359189a8bSTim Harvey */ 2459189a8bSTim Harvey int gsc_i2c_read(uchar chip, uint addr, int alen, uchar *buf, int len) 2559189a8bSTim Harvey { 2659189a8bSTim Harvey int retry = 3; 2759189a8bSTim Harvey int n = 0; 2859189a8bSTim Harvey int ret; 2959189a8bSTim Harvey 3059189a8bSTim Harvey while (n++ < retry) { 3159189a8bSTim Harvey ret = i2c_read(chip, addr, alen, buf, len); 3259189a8bSTim Harvey if (!ret) 3359189a8bSTim Harvey break; 3459189a8bSTim Harvey debug("%s: 0x%02x 0x%02x retry%d: %d\n", __func__, chip, addr, 3559189a8bSTim Harvey n, ret); 3659189a8bSTim Harvey if (ret != -ENODEV) 3759189a8bSTim Harvey break; 3859189a8bSTim Harvey mdelay(10); 3959189a8bSTim Harvey } 4059189a8bSTim Harvey return ret; 4159189a8bSTim Harvey } 4259189a8bSTim Harvey 4359189a8bSTim Harvey int gsc_i2c_write(uchar chip, uint addr, int alen, uchar *buf, int len) 4459189a8bSTim Harvey { 4559189a8bSTim Harvey int retry = 3; 4659189a8bSTim Harvey int n = 0; 4759189a8bSTim Harvey int ret; 4859189a8bSTim Harvey 4959189a8bSTim Harvey while (n++ < retry) { 5059189a8bSTim Harvey ret = i2c_write(chip, addr, alen, buf, len); 5159189a8bSTim Harvey if (!ret) 5259189a8bSTim Harvey break; 5359189a8bSTim Harvey debug("%s: 0x%02x 0x%02x retry%d: %d\n", __func__, chip, addr, 5459189a8bSTim Harvey n, ret); 5559189a8bSTim Harvey if (ret != -ENODEV) 5659189a8bSTim Harvey break; 5759189a8bSTim Harvey mdelay(10); 5859189a8bSTim Harvey } 59e5131d53STim Harvey mdelay(100); 6059189a8bSTim Harvey return ret; 6159189a8bSTim Harvey } 6259189a8bSTim Harvey 6316e369f5STim Harvey static void read_hwmon(const char *name, uint reg, uint size) 6459189a8bSTim Harvey { 6559189a8bSTim Harvey unsigned char buf[3]; 6659189a8bSTim Harvey uint ui; 6759189a8bSTim Harvey 6859189a8bSTim Harvey printf("%-8s:", name); 6959189a8bSTim Harvey memset(buf, 0, sizeof(buf)); 7059189a8bSTim Harvey if (gsc_i2c_read(GSC_HWMON_ADDR, reg, 1, buf, size)) { 7159189a8bSTim Harvey puts("fRD\n"); 7259189a8bSTim Harvey } else { 7359189a8bSTim Harvey ui = buf[0] | (buf[1]<<8) | (buf[2]<<16); 7482a17e75STim Harvey if (reg == GSC_HWMON_TEMP && ui > 0x8000) 7582a17e75STim Harvey ui -= 0xffff; 7659189a8bSTim Harvey if (ui == 0xffffff) 7716e369f5STim Harvey puts("invalid\n"); 7859189a8bSTim Harvey else 7916e369f5STim Harvey printf("%d\n", ui); 8059189a8bSTim Harvey } 8159189a8bSTim Harvey } 8259189a8bSTim Harvey 83ee5931d4STim Harvey int gsc_info(int verbose) 8459189a8bSTim Harvey { 85ee5931d4STim Harvey unsigned char buf[16]; 8659189a8bSTim Harvey 8759189a8bSTim Harvey i2c_set_bus_num(0); 88ee5931d4STim Harvey if (gsc_i2c_read(GSC_SC_ADDR, 0, 1, buf, 16)) 89ee5931d4STim Harvey return CMD_RET_FAILURE; 90ee5931d4STim Harvey 91ee5931d4STim Harvey printf("GSC: v%d", buf[GSC_SC_FWVER]); 92ee5931d4STim Harvey printf(" 0x%04x", buf[GSC_SC_FWCRC] | buf[GSC_SC_FWCRC+1]<<8); 93ee5931d4STim Harvey printf(" WDT:%sabled", (buf[GSC_SC_CTRL1] & (1<<GSC_SC_CTRL1_WDEN)) 94ee5931d4STim Harvey ? "en" : "dis"); 95ee5931d4STim Harvey if (buf[GSC_SC_STATUS] & (1 << GSC_SC_IRQ_WATCHDOG)) { 96ee5931d4STim Harvey buf[GSC_SC_STATUS] &= ~(1 << GSC_SC_IRQ_WATCHDOG); 97ee5931d4STim Harvey puts(" WDT_RESET"); 98ee5931d4STim Harvey gsc_i2c_write(GSC_SC_ADDR, GSC_SC_STATUS, 1, 99ee5931d4STim Harvey &buf[GSC_SC_STATUS], 1); 100ee5931d4STim Harvey } 101ca628b74STim Harvey if (!gsc_i2c_read(GSC_HWMON_ADDR, GSC_HWMON_TEMP, 1, buf, 2)) { 102ca628b74STim Harvey int ui = buf[0] | buf[1]<<8; 103ca628b74STim Harvey if (ui > 0x8000) 104ca628b74STim Harvey ui -= 0xffff; 105ca628b74STim Harvey printf(" board temp at %dC", ui / 10); 106ca628b74STim Harvey } 107ee5931d4STim Harvey puts("\n"); 108ee5931d4STim Harvey if (!verbose) 109ee5931d4STim Harvey return CMD_RET_SUCCESS; 110ee5931d4STim Harvey 11116e369f5STim Harvey read_hwmon("Temp", GSC_HWMON_TEMP, 2); 11216e369f5STim Harvey read_hwmon("VIN", GSC_HWMON_VIN, 3); 11316e369f5STim Harvey read_hwmon("VBATT", GSC_HWMON_VBATT, 3); 11416e369f5STim Harvey read_hwmon("VDD_3P3", GSC_HWMON_VDD_3P3, 3); 11545af3f74STim Harvey read_hwmon("VDD_ARM", GSC_HWMON_VDD_CORE, 3); 11645af3f74STim Harvey read_hwmon("VDD_SOC", GSC_HWMON_VDD_SOC, 3); 11716e369f5STim Harvey read_hwmon("VDD_HIGH", GSC_HWMON_VDD_HIGH, 3); 11816e369f5STim Harvey read_hwmon("VDD_DDR", GSC_HWMON_VDD_DDR, 3); 11916e369f5STim Harvey read_hwmon("VDD_5P0", GSC_HWMON_VDD_5P0, 3); 120385575bcSTim Harvey if (strncasecmp((const char*) ventana_info.model, "GW553", 5)) 12116e369f5STim Harvey read_hwmon("VDD_2P5", GSC_HWMON_VDD_2P5, 3); 12216e369f5STim Harvey read_hwmon("VDD_1P8", GSC_HWMON_VDD_1P8, 3); 12345af3f74STim Harvey read_hwmon("VDD_IO2", GSC_HWMON_VDD_IO2, 3); 124a419352dSTim Harvey switch (ventana_info.model[3]) { 12559189a8bSTim Harvey case '1': /* GW51xx */ 12645af3f74STim Harvey read_hwmon("VDD_IO3", GSC_HWMON_VDD_IO4, 3); /* -C rev */ 12759189a8bSTim Harvey break; 12859189a8bSTim Harvey case '2': /* GW52xx */ 12945af3f74STim Harvey break; 13059189a8bSTim Harvey case '3': /* GW53xx */ 13145af3f74STim Harvey read_hwmon("VDD_IO4", GSC_HWMON_VDD_IO4, 3); /* -C rev */ 13245af3f74STim Harvey read_hwmon("VDD_GPS", GSC_HWMON_VDD_IO3, 3); 13359189a8bSTim Harvey break; 13459189a8bSTim Harvey case '4': /* GW54xx */ 13545af3f74STim Harvey read_hwmon("VDD_IO3", GSC_HWMON_VDD_IO4, 3); /* -C rev */ 13645af3f74STim Harvey read_hwmon("VDD_GPS", GSC_HWMON_VDD_IO3, 3); 13759189a8bSTim Harvey break; 1383aa22674STim Harvey case '5': /* GW55xx */ 1393aa22674STim Harvey break; 14094a1d6c6STim Harvey case '6': /* GW560x */ 14194a1d6c6STim Harvey read_hwmon("VDD_IO4", GSC_HWMON_VDD_IO4, 3); 14294a1d6c6STim Harvey read_hwmon("VDD_GPS", GSC_HWMON_VDD_IO3, 3); 14394a1d6c6STim Harvey break; 14459189a8bSTim Harvey } 14559189a8bSTim Harvey return 0; 14659189a8bSTim Harvey } 14759189a8bSTim Harvey 1482d833c85STim Harvey /* 1492d833c85STim Harvey * The Gateworks System Controller implements a boot 1502d833c85STim Harvey * watchdog (always enabled) as a workaround for IMX6 boot related 1512d833c85STim Harvey * errata such as: 1522d833c85STim Harvey * ERR005768 - no fix scheduled 1532d833c85STim Harvey * ERR006282 - fixed in silicon r1.2 1542d833c85STim Harvey * ERR007117 - fixed in silicon r1.3 1552d833c85STim Harvey * ERR007220 - fixed in silicon r1.3 1562d833c85STim Harvey * ERR007926 - no fix scheduled 1572d833c85STim Harvey * see http://cache.freescale.com/files/32bit/doc/errata/IMX6DQCE.pdf 1582d833c85STim Harvey * 1592d833c85STim Harvey * Disable the boot watchdog 1602d833c85STim Harvey */ 1612d833c85STim Harvey int gsc_boot_wd_disable(void) 1622d833c85STim Harvey { 1632d833c85STim Harvey u8 reg; 1642d833c85STim Harvey 1652d833c85STim Harvey i2c_set_bus_num(CONFIG_I2C_GSC); 1662d833c85STim Harvey if (!gsc_i2c_read(GSC_SC_ADDR, GSC_SC_CTRL1, 1, ®, 1)) { 1672d833c85STim Harvey reg |= (1 << GSC_SC_CTRL1_WDDIS); 1682d833c85STim Harvey if (!gsc_i2c_write(GSC_SC_ADDR, GSC_SC_CTRL1, 1, ®, 1)) 1692d833c85STim Harvey return 0; 1702d833c85STim Harvey } 1712d833c85STim Harvey puts("Error: could not disable GSC Watchdog\n"); 1722d833c85STim Harvey return 1; 1732d833c85STim Harvey } 1742d833c85STim Harvey 175*bf52330aSTom Rini #if defined(CONFIG_CMD_GSC) && !defined(CONFIG_SPL_BUILD) 176efa7ed72STim Harvey static int do_gsc_sleep(cmd_tbl_t *cmdtp, int flag, int argc, 177efa7ed72STim Harvey char * const argv[]) 178efa7ed72STim Harvey { 179efa7ed72STim Harvey unsigned char reg; 180efa7ed72STim Harvey unsigned long secs = 0; 181efa7ed72STim Harvey 182efa7ed72STim Harvey if (argc < 2) 183efa7ed72STim Harvey return CMD_RET_USAGE; 184efa7ed72STim Harvey 185efa7ed72STim Harvey secs = simple_strtoul(argv[1], NULL, 10); 186efa7ed72STim Harvey printf("GSC Sleeping for %ld seconds\n", secs); 187efa7ed72STim Harvey 188efa7ed72STim Harvey i2c_set_bus_num(0); 189efa7ed72STim Harvey reg = (secs >> 24) & 0xff; 190efa7ed72STim Harvey if (gsc_i2c_write(GSC_SC_ADDR, 9, 1, ®, 1)) 191efa7ed72STim Harvey goto error; 192efa7ed72STim Harvey reg = (secs >> 16) & 0xff; 193efa7ed72STim Harvey if (gsc_i2c_write(GSC_SC_ADDR, 8, 1, ®, 1)) 194efa7ed72STim Harvey goto error; 195efa7ed72STim Harvey reg = (secs >> 8) & 0xff; 196efa7ed72STim Harvey if (gsc_i2c_write(GSC_SC_ADDR, 7, 1, ®, 1)) 197efa7ed72STim Harvey goto error; 198efa7ed72STim Harvey reg = secs & 0xff; 199efa7ed72STim Harvey if (gsc_i2c_write(GSC_SC_ADDR, 6, 1, ®, 1)) 200efa7ed72STim Harvey goto error; 201efa7ed72STim Harvey if (gsc_i2c_read(GSC_SC_ADDR, GSC_SC_CTRL1, 1, ®, 1)) 202efa7ed72STim Harvey goto error; 203efa7ed72STim Harvey reg |= (1 << 2); 204efa7ed72STim Harvey if (gsc_i2c_write(GSC_SC_ADDR, GSC_SC_CTRL1, 1, ®, 1)) 205efa7ed72STim Harvey goto error; 206efa7ed72STim Harvey reg &= ~(1 << 2); 207efa7ed72STim Harvey reg |= 0x3; 208efa7ed72STim Harvey if (gsc_i2c_write(GSC_SC_ADDR, GSC_SC_CTRL1, 1, ®, 1)) 209efa7ed72STim Harvey goto error; 210efa7ed72STim Harvey 211efa7ed72STim Harvey return CMD_RET_SUCCESS; 212efa7ed72STim Harvey 213efa7ed72STim Harvey error: 214efa7ed72STim Harvey printf("i2c error\n"); 215efa7ed72STim Harvey return CMD_RET_FAILURE; 216efa7ed72STim Harvey } 217efa7ed72STim Harvey 218ee5931d4STim Harvey static int do_gsc_wd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 219ee5931d4STim Harvey { 220ee5931d4STim Harvey unsigned char reg; 221ee5931d4STim Harvey 222ee5931d4STim Harvey if (argc < 2) 223ee5931d4STim Harvey return CMD_RET_USAGE; 224ee5931d4STim Harvey 225ee5931d4STim Harvey if (strcasecmp(argv[1], "enable") == 0) { 226ee5931d4STim Harvey int timeout = 0; 227ee5931d4STim Harvey 228ee5931d4STim Harvey if (argc > 2) 229ee5931d4STim Harvey timeout = simple_strtoul(argv[2], NULL, 10); 230ee5931d4STim Harvey i2c_set_bus_num(0); 231ee5931d4STim Harvey if (gsc_i2c_read(GSC_SC_ADDR, GSC_SC_CTRL1, 1, ®, 1)) 232ee5931d4STim Harvey return CMD_RET_FAILURE; 233ee5931d4STim Harvey reg &= ~((1 << GSC_SC_CTRL1_WDEN) | (1 << GSC_SC_CTRL1_WDTIME)); 234ee5931d4STim Harvey if (timeout == 60) 235ee5931d4STim Harvey reg |= (1 << GSC_SC_CTRL1_WDTIME); 236ee5931d4STim Harvey else 237ee5931d4STim Harvey timeout = 30; 238ee5931d4STim Harvey reg |= (1 << GSC_SC_CTRL1_WDEN); 239ee5931d4STim Harvey if (gsc_i2c_write(GSC_SC_ADDR, GSC_SC_CTRL1, 1, ®, 1)) 240ee5931d4STim Harvey return CMD_RET_FAILURE; 241ee5931d4STim Harvey printf("GSC Watchdog enabled with timeout=%d seconds\n", 242ee5931d4STim Harvey timeout); 243ee5931d4STim Harvey } else if (strcasecmp(argv[1], "disable") == 0) { 244ee5931d4STim Harvey i2c_set_bus_num(0); 245ee5931d4STim Harvey if (gsc_i2c_read(GSC_SC_ADDR, GSC_SC_CTRL1, 1, ®, 1)) 246ee5931d4STim Harvey return CMD_RET_FAILURE; 247ee5931d4STim Harvey reg &= ~((1 << GSC_SC_CTRL1_WDEN) | (1 << GSC_SC_CTRL1_WDTIME)); 248ee5931d4STim Harvey if (gsc_i2c_write(GSC_SC_ADDR, GSC_SC_CTRL1, 1, ®, 1)) 249ee5931d4STim Harvey return CMD_RET_FAILURE; 250ee5931d4STim Harvey printf("GSC Watchdog disabled\n"); 251ee5931d4STim Harvey } else { 252ee5931d4STim Harvey return CMD_RET_USAGE; 253ee5931d4STim Harvey } 254ee5931d4STim Harvey return CMD_RET_SUCCESS; 255ee5931d4STim Harvey } 256ee5931d4STim Harvey 257ee5931d4STim Harvey static int do_gsc(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 258ee5931d4STim Harvey { 259ee5931d4STim Harvey if (argc < 2) 260ee5931d4STim Harvey return gsc_info(1); 261ee5931d4STim Harvey 262ee5931d4STim Harvey if (strcasecmp(argv[1], "wd") == 0) 263ee5931d4STim Harvey return do_gsc_wd(cmdtp, flag, --argc, ++argv); 264efa7ed72STim Harvey else if (strcasecmp(argv[1], "sleep") == 0) 265efa7ed72STim Harvey return do_gsc_sleep(cmdtp, flag, --argc, ++argv); 266ee5931d4STim Harvey 267ee5931d4STim Harvey return CMD_RET_USAGE; 268ee5931d4STim Harvey } 269ee5931d4STim Harvey 270ee5931d4STim Harvey U_BOOT_CMD( 271ee5931d4STim Harvey gsc, 4, 1, do_gsc, "GSC configuration", 272efa7ed72STim Harvey "[wd enable [30|60]]|[wd disable]|[sleep <secs>]\n" 27359189a8bSTim Harvey ); 27459189a8bSTim Harvey 27559189a8bSTim Harvey #endif /* CONFIG_CMD_GSC */ 276