183d290c5STom Rini // SPDX-License-Identifier: GPL-2.0+ 259189a8bSTim Harvey /* 359189a8bSTim Harvey * Copyright (C) 2013 Gateworks Corporation 459189a8bSTim Harvey * 559189a8bSTim Harvey * Author: Tim Harvey <tharvey@gateworks.com> 659189a8bSTim Harvey */ 759189a8bSTim Harvey 81221ce45SMasahiro Yamada #include <linux/errno.h> 959189a8bSTim Harvey #include <common.h> 1059189a8bSTim Harvey #include <i2c.h> 1159189a8bSTim Harvey #include <linux/ctype.h> 1259189a8bSTim Harvey 13a419352dSTim Harvey #include "ventana_eeprom.h" 1459189a8bSTim Harvey #include "gsc.h" 1559189a8bSTim Harvey 1659189a8bSTim Harvey /* 1759189a8bSTim Harvey * The Gateworks System Controller will fail to ACK a master transaction if 1859189a8bSTim Harvey * it is busy, which can occur during its 1HZ timer tick while reading ADC's. 1959189a8bSTim Harvey * When this does occur, it will never be busy long enough to fail more than 2059189a8bSTim Harvey * 2 back-to-back transfers. Thus we wrap i2c_read and i2c_write with 2159189a8bSTim Harvey * 3 retries. 2259189a8bSTim Harvey */ 2359189a8bSTim Harvey int gsc_i2c_read(uchar chip, uint addr, int alen, uchar *buf, int len) 2459189a8bSTim Harvey { 2559189a8bSTim Harvey int retry = 3; 2659189a8bSTim Harvey int n = 0; 2759189a8bSTim Harvey int ret; 2859189a8bSTim Harvey 2959189a8bSTim Harvey while (n++ < retry) { 3059189a8bSTim Harvey ret = i2c_read(chip, addr, alen, buf, len); 3159189a8bSTim Harvey if (!ret) 3259189a8bSTim Harvey break; 3359189a8bSTim Harvey debug("%s: 0x%02x 0x%02x retry%d: %d\n", __func__, chip, addr, 3459189a8bSTim Harvey n, ret); 3559189a8bSTim Harvey if (ret != -ENODEV) 3659189a8bSTim Harvey break; 3759189a8bSTim Harvey mdelay(10); 3859189a8bSTim Harvey } 3959189a8bSTim Harvey return ret; 4059189a8bSTim Harvey } 4159189a8bSTim Harvey 4259189a8bSTim Harvey int gsc_i2c_write(uchar chip, uint addr, int alen, uchar *buf, int len) 4359189a8bSTim Harvey { 4459189a8bSTim Harvey int retry = 3; 4559189a8bSTim Harvey int n = 0; 4659189a8bSTim Harvey int ret; 4759189a8bSTim Harvey 4859189a8bSTim Harvey while (n++ < retry) { 4959189a8bSTim Harvey ret = i2c_write(chip, addr, alen, buf, len); 5059189a8bSTim Harvey if (!ret) 5159189a8bSTim Harvey break; 5259189a8bSTim Harvey debug("%s: 0x%02x 0x%02x retry%d: %d\n", __func__, chip, addr, 5359189a8bSTim Harvey n, ret); 5459189a8bSTim Harvey if (ret != -ENODEV) 5559189a8bSTim Harvey break; 5659189a8bSTim Harvey mdelay(10); 5759189a8bSTim Harvey } 58e5131d53STim Harvey mdelay(100); 5959189a8bSTim Harvey return ret; 6059189a8bSTim Harvey } 6159189a8bSTim Harvey 6216e369f5STim Harvey static void read_hwmon(const char *name, uint reg, uint size) 6359189a8bSTim Harvey { 6459189a8bSTim Harvey unsigned char buf[3]; 6559189a8bSTim Harvey uint ui; 6659189a8bSTim Harvey 6759189a8bSTim Harvey printf("%-8s:", name); 6859189a8bSTim Harvey memset(buf, 0, sizeof(buf)); 6959189a8bSTim Harvey if (gsc_i2c_read(GSC_HWMON_ADDR, reg, 1, buf, size)) { 7059189a8bSTim Harvey puts("fRD\n"); 7159189a8bSTim Harvey } else { 7259189a8bSTim Harvey ui = buf[0] | (buf[1]<<8) | (buf[2]<<16); 73*d1c3867aSTim Harvey if (size == 2 && ui > 0x8000) 7482a17e75STim Harvey ui -= 0xffff; 7559189a8bSTim Harvey if (ui == 0xffffff) 7616e369f5STim Harvey puts("invalid\n"); 7759189a8bSTim Harvey else 7816e369f5STim Harvey printf("%d\n", ui); 7959189a8bSTim Harvey } 8059189a8bSTim Harvey } 8159189a8bSTim Harvey 82ee5931d4STim Harvey int gsc_info(int verbose) 8359189a8bSTim Harvey { 84ee5931d4STim Harvey unsigned char buf[16]; 8559189a8bSTim Harvey 8659189a8bSTim Harvey i2c_set_bus_num(0); 87ee5931d4STim Harvey if (gsc_i2c_read(GSC_SC_ADDR, 0, 1, buf, 16)) 88ee5931d4STim Harvey return CMD_RET_FAILURE; 89ee5931d4STim Harvey 90ee5931d4STim Harvey printf("GSC: v%d", buf[GSC_SC_FWVER]); 91ee5931d4STim Harvey printf(" 0x%04x", buf[GSC_SC_FWCRC] | buf[GSC_SC_FWCRC+1]<<8); 92ee5931d4STim Harvey printf(" WDT:%sabled", (buf[GSC_SC_CTRL1] & (1<<GSC_SC_CTRL1_WDEN)) 93ee5931d4STim Harvey ? "en" : "dis"); 94ee5931d4STim Harvey if (buf[GSC_SC_STATUS] & (1 << GSC_SC_IRQ_WATCHDOG)) { 95ee5931d4STim Harvey buf[GSC_SC_STATUS] &= ~(1 << GSC_SC_IRQ_WATCHDOG); 96ee5931d4STim Harvey puts(" WDT_RESET"); 97ee5931d4STim Harvey gsc_i2c_write(GSC_SC_ADDR, GSC_SC_STATUS, 1, 98ee5931d4STim Harvey &buf[GSC_SC_STATUS], 1); 99ee5931d4STim Harvey } 100ca628b74STim Harvey if (!gsc_i2c_read(GSC_HWMON_ADDR, GSC_HWMON_TEMP, 1, buf, 2)) { 101ca628b74STim Harvey int ui = buf[0] | buf[1]<<8; 102ca628b74STim Harvey if (ui > 0x8000) 103ca628b74STim Harvey ui -= 0xffff; 104ca628b74STim Harvey printf(" board temp at %dC", ui / 10); 105ca628b74STim Harvey } 106ee5931d4STim Harvey puts("\n"); 107ee5931d4STim Harvey if (!verbose) 108ee5931d4STim Harvey return CMD_RET_SUCCESS; 109ee5931d4STim Harvey 11016e369f5STim Harvey read_hwmon("Temp", GSC_HWMON_TEMP, 2); 11116e369f5STim Harvey read_hwmon("VIN", GSC_HWMON_VIN, 3); 11216e369f5STim Harvey read_hwmon("VBATT", GSC_HWMON_VBATT, 3); 11316e369f5STim Harvey read_hwmon("VDD_3P3", GSC_HWMON_VDD_3P3, 3); 11445af3f74STim Harvey read_hwmon("VDD_ARM", GSC_HWMON_VDD_CORE, 3); 11545af3f74STim Harvey read_hwmon("VDD_SOC", GSC_HWMON_VDD_SOC, 3); 11616e369f5STim Harvey read_hwmon("VDD_HIGH", GSC_HWMON_VDD_HIGH, 3); 11716e369f5STim Harvey read_hwmon("VDD_DDR", GSC_HWMON_VDD_DDR, 3); 11816e369f5STim Harvey read_hwmon("VDD_5P0", GSC_HWMON_VDD_5P0, 3); 119385575bcSTim Harvey if (strncasecmp((const char*) ventana_info.model, "GW553", 5)) 12016e369f5STim Harvey read_hwmon("VDD_2P5", GSC_HWMON_VDD_2P5, 3); 12116e369f5STim Harvey read_hwmon("VDD_1P8", GSC_HWMON_VDD_1P8, 3); 12245af3f74STim Harvey read_hwmon("VDD_IO2", GSC_HWMON_VDD_IO2, 3); 123a419352dSTim Harvey switch (ventana_info.model[3]) { 12459189a8bSTim Harvey case '1': /* GW51xx */ 12545af3f74STim Harvey read_hwmon("VDD_IO3", GSC_HWMON_VDD_IO4, 3); /* -C rev */ 12659189a8bSTim Harvey break; 12759189a8bSTim Harvey case '2': /* GW52xx */ 12845af3f74STim Harvey break; 12959189a8bSTim Harvey case '3': /* GW53xx */ 13045af3f74STim Harvey read_hwmon("VDD_IO4", GSC_HWMON_VDD_IO4, 3); /* -C rev */ 13145af3f74STim Harvey read_hwmon("VDD_GPS", GSC_HWMON_VDD_IO3, 3); 13259189a8bSTim Harvey break; 13359189a8bSTim Harvey case '4': /* GW54xx */ 13445af3f74STim Harvey read_hwmon("VDD_IO3", GSC_HWMON_VDD_IO4, 3); /* -C rev */ 13545af3f74STim Harvey read_hwmon("VDD_GPS", GSC_HWMON_VDD_IO3, 3); 13659189a8bSTim Harvey break; 1373aa22674STim Harvey case '5': /* GW55xx */ 1383aa22674STim Harvey break; 13994a1d6c6STim Harvey case '6': /* GW560x */ 14094a1d6c6STim Harvey read_hwmon("VDD_IO4", GSC_HWMON_VDD_IO4, 3); 14194a1d6c6STim Harvey read_hwmon("VDD_GPS", GSC_HWMON_VDD_IO3, 3); 14294a1d6c6STim Harvey break; 143*d1c3867aSTim Harvey case '9': /* GW590x */ 144*d1c3867aSTim Harvey read_hwmon("AMONBMON", GSC_HWMON_VDD_IO3, 3); 145*d1c3867aSTim Harvey read_hwmon("BAT_VOLT", GSC_HWMON_VDD_EXT, 3); 146*d1c3867aSTim Harvey read_hwmon("BAT_TEMP", GSC_HWMON_VDD_IO4, 2); 14759189a8bSTim Harvey } 14859189a8bSTim Harvey return 0; 14959189a8bSTim Harvey } 15059189a8bSTim Harvey 1512d833c85STim Harvey /* 1522d833c85STim Harvey * The Gateworks System Controller implements a boot 1532d833c85STim Harvey * watchdog (always enabled) as a workaround for IMX6 boot related 1542d833c85STim Harvey * errata such as: 1552d833c85STim Harvey * ERR005768 - no fix scheduled 1562d833c85STim Harvey * ERR006282 - fixed in silicon r1.2 1572d833c85STim Harvey * ERR007117 - fixed in silicon r1.3 1582d833c85STim Harvey * ERR007220 - fixed in silicon r1.3 1592d833c85STim Harvey * ERR007926 - no fix scheduled 1602d833c85STim Harvey * see http://cache.freescale.com/files/32bit/doc/errata/IMX6DQCE.pdf 1612d833c85STim Harvey * 1622d833c85STim Harvey * Disable the boot watchdog 1632d833c85STim Harvey */ 1642d833c85STim Harvey int gsc_boot_wd_disable(void) 1652d833c85STim Harvey { 1662d833c85STim Harvey u8 reg; 1672d833c85STim Harvey 1682d833c85STim Harvey i2c_set_bus_num(CONFIG_I2C_GSC); 1692d833c85STim Harvey if (!gsc_i2c_read(GSC_SC_ADDR, GSC_SC_CTRL1, 1, ®, 1)) { 1702d833c85STim Harvey reg |= (1 << GSC_SC_CTRL1_WDDIS); 1712d833c85STim Harvey if (!gsc_i2c_write(GSC_SC_ADDR, GSC_SC_CTRL1, 1, ®, 1)) 1722d833c85STim Harvey return 0; 1732d833c85STim Harvey } 1742d833c85STim Harvey puts("Error: could not disable GSC Watchdog\n"); 1752d833c85STim Harvey return 1; 1762d833c85STim Harvey } 1772d833c85STim Harvey 178bf52330aSTom Rini #if defined(CONFIG_CMD_GSC) && !defined(CONFIG_SPL_BUILD) 179efa7ed72STim Harvey static int do_gsc_sleep(cmd_tbl_t *cmdtp, int flag, int argc, 180efa7ed72STim Harvey char * const argv[]) 181efa7ed72STim Harvey { 182efa7ed72STim Harvey unsigned char reg; 183efa7ed72STim Harvey unsigned long secs = 0; 184efa7ed72STim Harvey 185efa7ed72STim Harvey if (argc < 2) 186efa7ed72STim Harvey return CMD_RET_USAGE; 187efa7ed72STim Harvey 188efa7ed72STim Harvey secs = simple_strtoul(argv[1], NULL, 10); 189efa7ed72STim Harvey printf("GSC Sleeping for %ld seconds\n", secs); 190efa7ed72STim Harvey 191efa7ed72STim Harvey i2c_set_bus_num(0); 192efa7ed72STim Harvey reg = (secs >> 24) & 0xff; 193efa7ed72STim Harvey if (gsc_i2c_write(GSC_SC_ADDR, 9, 1, ®, 1)) 194efa7ed72STim Harvey goto error; 195efa7ed72STim Harvey reg = (secs >> 16) & 0xff; 196efa7ed72STim Harvey if (gsc_i2c_write(GSC_SC_ADDR, 8, 1, ®, 1)) 197efa7ed72STim Harvey goto error; 198efa7ed72STim Harvey reg = (secs >> 8) & 0xff; 199efa7ed72STim Harvey if (gsc_i2c_write(GSC_SC_ADDR, 7, 1, ®, 1)) 200efa7ed72STim Harvey goto error; 201efa7ed72STim Harvey reg = secs & 0xff; 202efa7ed72STim Harvey if (gsc_i2c_write(GSC_SC_ADDR, 6, 1, ®, 1)) 203efa7ed72STim Harvey goto error; 204efa7ed72STim Harvey if (gsc_i2c_read(GSC_SC_ADDR, GSC_SC_CTRL1, 1, ®, 1)) 205efa7ed72STim Harvey goto error; 206efa7ed72STim Harvey reg |= (1 << 2); 207efa7ed72STim Harvey if (gsc_i2c_write(GSC_SC_ADDR, GSC_SC_CTRL1, 1, ®, 1)) 208efa7ed72STim Harvey goto error; 209efa7ed72STim Harvey reg &= ~(1 << 2); 210efa7ed72STim Harvey reg |= 0x3; 211efa7ed72STim Harvey if (gsc_i2c_write(GSC_SC_ADDR, GSC_SC_CTRL1, 1, ®, 1)) 212efa7ed72STim Harvey goto error; 213efa7ed72STim Harvey 214efa7ed72STim Harvey return CMD_RET_SUCCESS; 215efa7ed72STim Harvey 216efa7ed72STim Harvey error: 217efa7ed72STim Harvey printf("i2c error\n"); 218efa7ed72STim Harvey return CMD_RET_FAILURE; 219efa7ed72STim Harvey } 220efa7ed72STim Harvey 221ee5931d4STim Harvey static int do_gsc_wd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 222ee5931d4STim Harvey { 223ee5931d4STim Harvey unsigned char reg; 224ee5931d4STim Harvey 225ee5931d4STim Harvey if (argc < 2) 226ee5931d4STim Harvey return CMD_RET_USAGE; 227ee5931d4STim Harvey 228ee5931d4STim Harvey if (strcasecmp(argv[1], "enable") == 0) { 229ee5931d4STim Harvey int timeout = 0; 230ee5931d4STim Harvey 231ee5931d4STim Harvey if (argc > 2) 232ee5931d4STim Harvey timeout = simple_strtoul(argv[2], NULL, 10); 233ee5931d4STim Harvey i2c_set_bus_num(0); 234ee5931d4STim Harvey if (gsc_i2c_read(GSC_SC_ADDR, GSC_SC_CTRL1, 1, ®, 1)) 235ee5931d4STim Harvey return CMD_RET_FAILURE; 236ee5931d4STim Harvey reg &= ~((1 << GSC_SC_CTRL1_WDEN) | (1 << GSC_SC_CTRL1_WDTIME)); 237ee5931d4STim Harvey if (timeout == 60) 238ee5931d4STim Harvey reg |= (1 << GSC_SC_CTRL1_WDTIME); 239ee5931d4STim Harvey else 240ee5931d4STim Harvey timeout = 30; 241ee5931d4STim Harvey reg |= (1 << GSC_SC_CTRL1_WDEN); 242ee5931d4STim Harvey if (gsc_i2c_write(GSC_SC_ADDR, GSC_SC_CTRL1, 1, ®, 1)) 243ee5931d4STim Harvey return CMD_RET_FAILURE; 244ee5931d4STim Harvey printf("GSC Watchdog enabled with timeout=%d seconds\n", 245ee5931d4STim Harvey timeout); 246ee5931d4STim Harvey } else if (strcasecmp(argv[1], "disable") == 0) { 247ee5931d4STim Harvey i2c_set_bus_num(0); 248ee5931d4STim Harvey if (gsc_i2c_read(GSC_SC_ADDR, GSC_SC_CTRL1, 1, ®, 1)) 249ee5931d4STim Harvey return CMD_RET_FAILURE; 250ee5931d4STim Harvey reg &= ~((1 << GSC_SC_CTRL1_WDEN) | (1 << GSC_SC_CTRL1_WDTIME)); 251ee5931d4STim Harvey if (gsc_i2c_write(GSC_SC_ADDR, GSC_SC_CTRL1, 1, ®, 1)) 252ee5931d4STim Harvey return CMD_RET_FAILURE; 253ee5931d4STim Harvey printf("GSC Watchdog disabled\n"); 254ee5931d4STim Harvey } else { 255ee5931d4STim Harvey return CMD_RET_USAGE; 256ee5931d4STim Harvey } 257ee5931d4STim Harvey return CMD_RET_SUCCESS; 258ee5931d4STim Harvey } 259ee5931d4STim Harvey 260ee5931d4STim Harvey static int do_gsc(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 261ee5931d4STim Harvey { 262ee5931d4STim Harvey if (argc < 2) 263ee5931d4STim Harvey return gsc_info(1); 264ee5931d4STim Harvey 265ee5931d4STim Harvey if (strcasecmp(argv[1], "wd") == 0) 266ee5931d4STim Harvey return do_gsc_wd(cmdtp, flag, --argc, ++argv); 267efa7ed72STim Harvey else if (strcasecmp(argv[1], "sleep") == 0) 268efa7ed72STim Harvey return do_gsc_sleep(cmdtp, flag, --argc, ++argv); 269ee5931d4STim Harvey 270ee5931d4STim Harvey return CMD_RET_USAGE; 271ee5931d4STim Harvey } 272ee5931d4STim Harvey 273ee5931d4STim Harvey U_BOOT_CMD( 274ee5931d4STim Harvey gsc, 4, 1, do_gsc, "GSC configuration", 275efa7ed72STim Harvey "[wd enable [30|60]]|[wd disable]|[sleep <secs>]\n" 27659189a8bSTim Harvey ); 27759189a8bSTim Harvey 27859189a8bSTim Harvey #endif /* CONFIG_CMD_GSC */ 279