Beispiel #1
0
int cros_ec_register(struct udevice *dev)
{
	struct cros_ec_dev *cdev = dev_get_uclass_priv(dev);
	const void *blob = gd->fdt_blob;
	int node = dev->of_offset;
	char id[MSG_BYTES];

	cdev->dev = dev;
	gpio_request_by_name(dev, "ec-interrupt", 0, &cdev->ec_int,
			     GPIOD_IS_IN);
	cdev->optimise_flash_write = fdtdec_get_bool(blob, node,
						     "optimise-flash-write");

	if (cros_ec_check_version(cdev)) {
		debug("%s: Could not detect CROS-EC version\n", __func__);
		return -CROS_EC_ERR_CHECK_VERSION;
	}

	if (cros_ec_read_id(cdev, id, sizeof(id))) {
		debug("%s: Could not read KBC ID\n", __func__);
		return -CROS_EC_ERR_READ_ID;
	}

	/* Remember this device for use by the cros_ec command */
	debug("Google Chrome EC v%d CROS-EC driver ready, id '%s'\n",
	      cdev->protocol_version, id);

	return 0;
}
Beispiel #2
0
static int do_cros_ec(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	struct cros_ec_dev *dev;
	struct udevice *udev;
	const char *cmd;
	int ret = 0;

	if (argc < 2)
		return CMD_RET_USAGE;

	cmd = argv[1];
	if (0 == strcmp("init", cmd)) {
		/* Remove any existing device */
		ret = uclass_find_device(UCLASS_CROS_EC, 0, &udev);
		if (!ret)
			device_remove(udev);
		ret = uclass_get_device(UCLASS_CROS_EC, 0, &udev);
		if (ret) {
			printf("Could not init cros_ec device (err %d)\n", ret);
			return 1;
		}
		return 0;
	}

	ret = uclass_get_device(UCLASS_CROS_EC, 0, &udev);
	if (ret) {
		printf("Cannot get cros-ec device (err=%d)\n", ret);
		return 1;
	}
	dev = dev_get_uclass_priv(udev);
	if (0 == strcmp("id", cmd)) {
		char id[MSG_BYTES];

		if (cros_ec_read_id(dev, id, sizeof(id))) {
			debug("%s: Could not read KBC ID\n", __func__);
			return 1;
		}
		printf("%s\n", id);
	} else if (0 == strcmp("info", cmd)) {
		struct ec_response_mkbp_info info;

		if (cros_ec_info(dev, &info)) {
			debug("%s: Could not read KBC info\n", __func__);
			return 1;
		}
		printf("rows     = %u\n", info.rows);
		printf("cols     = %u\n", info.cols);
		printf("switches = %#x\n", info.switches);
	} else if (0 == strcmp("curimage", cmd)) {
		enum ec_current_image image;

		if (cros_ec_read_current_image(dev, &image)) {
			debug("%s: Could not read KBC image\n", __func__);
			return 1;
		}
		printf("%d\n", image);
	} else if (0 == strcmp("hash", cmd)) {
		struct ec_response_vboot_hash hash;
		int i;

		if (cros_ec_read_hash(dev, &hash)) {
			debug("%s: Could not read KBC hash\n", __func__);
			return 1;
		}

		if (hash.hash_type == EC_VBOOT_HASH_TYPE_SHA256)
			printf("type:    SHA-256\n");
		else
			printf("type:    %d\n", hash.hash_type);

		printf("offset:  0x%08x\n", hash.offset);
		printf("size:    0x%08x\n", hash.size);

		printf("digest:  ");
		for (i = 0; i < hash.digest_size; i++)
			printf("%02x", hash.hash_digest[i]);
		printf("\n");
	} else if (0 == strcmp("reboot", cmd)) {
		int region;
		enum ec_reboot_cmd cmd;

		if (argc >= 3 && !strcmp(argv[2], "cold"))
			cmd = EC_REBOOT_COLD;
		else {
			region = cros_ec_decode_region(argc - 2, argv + 2);
			if (region == EC_FLASH_REGION_RO)
				cmd = EC_REBOOT_JUMP_RO;
			else if (region == EC_FLASH_REGION_RW)
				cmd = EC_REBOOT_JUMP_RW;
			else
				return CMD_RET_USAGE;
		}

		if (cros_ec_reboot(dev, cmd, 0)) {
			debug("%s: Could not reboot KBC\n", __func__);
			return 1;
		}
	} else if (0 == strcmp("events", cmd)) {
		uint32_t events;

		if (cros_ec_get_host_events(dev, &events)) {
			debug("%s: Could not read host events\n", __func__);
			return 1;
		}
		printf("0x%08x\n", events);
	} else if (0 == strcmp("clrevents", cmd)) {
		uint32_t events = 0x7fffffff;

		if (argc >= 3)
			events = simple_strtol(argv[2], NULL, 0);

		if (cros_ec_clear_host_events(dev, events)) {
			debug("%s: Could not clear host events\n", __func__);
			return 1;
		}
	} else if (0 == strcmp("read", cmd)) {
		ret = do_read_write(dev, 0, argc, argv);
		if (ret > 0)
			return CMD_RET_USAGE;
	} else if (0 == strcmp("write", cmd)) {
		ret = do_read_write(dev, 1, argc, argv);
		if (ret > 0)
			return CMD_RET_USAGE;
	} else if (0 == strcmp("erase", cmd)) {
		int region = cros_ec_decode_region(argc - 2, argv + 2);
		uint32_t offset, size;

		if (region == -1)
			return CMD_RET_USAGE;
		if (cros_ec_flash_offset(dev, region, &offset, &size)) {
			debug("%s: Could not read region info\n", __func__);
			ret = -1;
		} else {
			ret = cros_ec_flash_erase(dev, offset, size);
			if (ret) {
				debug("%s: Could not erase region\n",
				      __func__);
			}
		}
	} else if (0 == strcmp("regioninfo", cmd)) {
		int region = cros_ec_decode_region(argc - 2, argv + 2);
		uint32_t offset, size;

		if (region == -1)
			return CMD_RET_USAGE;
		ret = cros_ec_flash_offset(dev, region, &offset, &size);
		if (ret) {
			debug("%s: Could not read region info\n", __func__);
		} else {
			printf("Region: %s\n", region == EC_FLASH_REGION_RO ?
					"RO" : "RW");
			printf("Offset: %x\n", offset);
			printf("Size:   %x\n", size);
		}
	} else if (0 == strcmp("vbnvcontext", cmd)) {
		uint8_t block[EC_VBNV_BLOCK_SIZE];
		char buf[3];
		int i, len;
		unsigned long result;

		if (argc <= 2) {
			ret = cros_ec_read_vbnvcontext(dev, block);
			if (!ret) {
				printf("vbnv_block: ");
				for (i = 0; i < EC_VBNV_BLOCK_SIZE; i++)
					printf("%02x", block[i]);
				putc('\n');
			}
		} else {
			/*
			 * TODO(clchiou): Move this to a utility function as
			 * cmd_spi might want to call it.
			 */
			memset(block, 0, EC_VBNV_BLOCK_SIZE);
			len = strlen(argv[2]);
			buf[2] = '\0';
			for (i = 0; i < EC_VBNV_BLOCK_SIZE; i++) {
				if (i * 2 >= len)
					break;
				buf[0] = argv[2][i * 2];
				if (i * 2 + 1 >= len)
					buf[1] = '0';
				else
					buf[1] = argv[2][i * 2 + 1];
				strict_strtoul(buf, 16, &result);
				block[i] = result;
			}
			ret = cros_ec_write_vbnvcontext(dev, block);
		}
		if (ret) {
			debug("%s: Could not %s VbNvContext\n", __func__,
					argc <= 2 ?  "read" : "write");
		}
	} else if (0 == strcmp("test", cmd)) {
		int result = cros_ec_test(dev);

		if (result)
			printf("Test failed with error %d\n", result);
		else
			puts("Test passed\n");
	} else if (0 == strcmp("version", cmd)) {
		struct ec_response_get_version *p;
		char *build_string;

		ret = cros_ec_read_version(dev, &p);
		if (!ret) {
			/* Print versions */
			printf("RO version:    %1.*s\n",
			       (int)sizeof(p->version_string_ro),
			       p->version_string_ro);
			printf("RW version:    %1.*s\n",
			       (int)sizeof(p->version_string_rw),
			       p->version_string_rw);
			printf("Firmware copy: %s\n",
				(p->current_image <
					ARRAY_SIZE(ec_current_image_name) ?
				ec_current_image_name[p->current_image] :
				"?"));
			ret = cros_ec_read_build_info(dev, &build_string);
			if (!ret)
				printf("Build info:    %s\n", build_string);
		}
	} else if (0 == strcmp("ldo", cmd)) {
		uint8_t index, state;
		char *endp;

		if (argc < 3)
			return CMD_RET_USAGE;
		index = simple_strtoul(argv[2], &endp, 10);
		if (*argv[2] == 0 || *endp != 0)
			return CMD_RET_USAGE;
		if (argc > 3) {
			state = simple_strtoul(argv[3], &endp, 10);
			if (*argv[3] == 0 || *endp != 0)
				return CMD_RET_USAGE;
			ret = cros_ec_set_ldo(udev, index, state);
		} else {
			ret = cros_ec_get_ldo(udev, index, &state);
			if (!ret) {
				printf("LDO%d: %s\n", index,
					state == EC_LDO_STATE_ON ?
					"on" : "off");
			}
		}

		if (ret) {
			debug("%s: Could not access LDO%d\n", __func__, index);
			return ret;
		}
	} else {
		return CMD_RET_USAGE;
	}

	if (ret < 0) {
		printf("Error: CROS-EC command failed (error %d)\n", ret);
		ret = 1;
	}

	return ret;
}
Beispiel #3
0
int cros_ec_init(const void *blob, struct cros_ec_dev **cros_ecp)
{
	char id[MSG_BYTES];
	struct cros_ec_dev *dev;
	int node = 0;

	*cros_ecp = NULL;
	do {
		node = fdtdec_next_compatible(blob, node,
					      COMPAT_GOOGLE_CROS_EC);
		if (node < 0) {
			debug("%s: Node not found\n", __func__);
			return 0;
		}
	} while (!fdtdec_get_is_enabled(blob, node));

	if (cros_ec_decode_fdt(blob, node, &dev)) {
		debug("%s: Failed to decode device.\n", __func__);
		return -CROS_EC_ERR_FDT_DECODE;
	}

	switch (dev->interface) {
#ifdef CONFIG_CROS_EC_SPI
	case CROS_EC_IF_SPI:
		if (cros_ec_spi_init(dev, blob)) {
			debug("%s: Could not setup SPI interface\n", __func__);
			return -CROS_EC_ERR_DEV_INIT;
		}
		break;
#endif
#ifdef CONFIG_CROS_EC_I2C
	case CROS_EC_IF_I2C:
		if (cros_ec_i2c_init(dev, blob))
			return -CROS_EC_ERR_DEV_INIT;
		break;
#endif
#ifdef CONFIG_CROS_EC_LPC
	case CROS_EC_IF_LPC:
		if (cros_ec_lpc_init(dev, blob))
			return -CROS_EC_ERR_DEV_INIT;
		break;
#endif
#ifdef CONFIG_CROS_EC_SANDBOX
	case CROS_EC_IF_SANDBOX:
		if (cros_ec_sandbox_init(dev, blob))
			return -CROS_EC_ERR_DEV_INIT;
		break;
#endif
	case CROS_EC_IF_NONE:
	default:
		return 0;
	}

	/* we will poll the EC interrupt line */
	fdtdec_setup_gpio(&dev->ec_int);
	if (fdt_gpio_isvalid(&dev->ec_int))
		gpio_direction_input(dev->ec_int.gpio);

	if (cros_ec_check_version(dev)) {
		debug("%s: Could not detect CROS-EC version\n", __func__);
		return -CROS_EC_ERR_CHECK_VERSION;
	}

	if (cros_ec_read_id(dev, id, sizeof(id))) {
		debug("%s: Could not read KBC ID\n", __func__);
		return -CROS_EC_ERR_READ_ID;
	}

	/* Remember this device for use by the cros_ec command */
	last_dev = *cros_ecp = dev;
	debug("Google Chrome EC CROS-EC driver ready, id '%s'\n", id);

	return 0;
}