+++ /dev/null
-// 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 <asm/global_data.h>
-#include <dm/device.h>
-#include <dm/uclass.h>
-
-#include "ventana_eeprom.h"
-#include "gsc.h"
-
-DECLARE_GLOBAL_DATA_PTR;
-
-#if CONFIG_IS_ENABLED(DM_I2C)
-struct udevice *i2c_get_dev(int busno, int slave)
-{
- struct udevice *dev, *bus;
- int ret;
-
- ret = uclass_get_device_by_seq(UCLASS_I2C, busno, &bus);
- if (ret)
- return NULL;
- ret = dm_i2c_probe(bus, slave, 0, &dev);
- if (ret)
- return NULL;
-
- return dev;
-}
-#endif
-
-/*
- * 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;
-#if CONFIG_IS_ENABLED(DM_I2C)
- struct udevice *dev;
-
- dev = i2c_get_dev(CONFIG_I2C_GSC, chip);
- if (!dev)
- return -ENODEV;
- ret = i2c_set_chip_offset_len(dev, alen);
- if (ret) {
- puts("EEPROM: Failed to set alen\n");
- return ret;
- }
-#else
- i2c_set_bus_num(CONFIG_I2C_GSC);
-#endif
-
- while (n++ < retry) {
-#if CONFIG_IS_ENABLED(DM_I2C)
- ret = dm_i2c_read(dev, addr, buf, len);
-#else
- ret = i2c_read(chip, addr, alen, buf, len);
-#endif
- if (!ret)
- break;
- debug("%s: 0x%02x 0x%02x retry%d: %d\n", __func__, chip, addr,
- n, ret);
- if (ret != -EREMOTEIO)
- 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;
-#if CONFIG_IS_ENABLED(DM_I2C)
- struct udevice *dev;
-
- dev = i2c_get_dev(CONFIG_I2C_GSC, chip);
- if (!dev)
- return -ENODEV;
- ret = i2c_set_chip_offset_len(dev, alen);
- if (ret) {
- puts("EEPROM: Failed to set alen\n");
- return ret;
- }
-#endif
-
- while (n++ < retry) {
-#if CONFIG_IS_ENABLED(DM_I2C)
- ret = dm_i2c_write(dev, addr, buf, len);
-#else
- ret = i2c_write(chip, addr, alen, buf, len);
-#endif
- if (!ret)
- break;
- debug("%s: 0x%02x 0x%02x retry%d: %d\n", __func__, chip, addr,
- n, ret);
- if (ret != -EREMOTEIO)
- break;
- mdelay(10);
- }
- mdelay(100);
- return ret;
-}
-
-int gsc_get_board_temp(void)
-{
- const void *fdt = gd->fdt_blob;
- int node, reg, mode, val;
- const char *label;
- u8 buf[2];
- int ret;
-
- node = fdt_node_offset_by_compatible(fdt, -1, "gw,gsc-adc");
- if (node <= 0)
- return node;
-
- /* 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);
- 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));
- continue;
- }
-
- if ((mode != 0) || strcmp(label, "temp"))
- continue;
-
- memset(buf, 0, sizeof(buf));
- ret = gsc_i2c_read(GSC_HWMON_ADDR, reg, 1, buf, sizeof(buf));
- val = buf[0] | buf[1] << 8;
- if (val >= 0) {
- if (val > 0x8000)
- val -= 0xffff;
- return val;
- }
- node = fdt_next_subnode(fdt, node);
- }
-
- return 0;
-}
-
-/* display hardware monitor ADC channels */
-int gsc_hwmon(void)
-{
- const void *fdt = gd->fdt_blob;
- 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;
-
- /* 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 = gsc_i2c_read(GSC_HWMON_ADDR, reg, 1, buf, sizeof(buf));
- 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;
-}
-
-int gsc_info(int verbose)
-{
- unsigned char buf[16];
-
- 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);
- }
- printf(" board temp at %dC", gsc_get_board_temp() / 10);
- puts("\n");
- if (!verbose)
- return CMD_RET_SUCCESS;
-
- gsc_hwmon();
-
- 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;
-
- 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);
-
- 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);
- 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) {
- 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 */
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