| /* |
| * cros_ec_sysfs - expose the Chrome OS EC through sysfs |
| * |
| * Copyright (C) 2014 Google, Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #define pr_fmt(fmt) "cros_ec_sysfs: " fmt |
| |
| #include <linux/ctype.h> |
| #include <linux/delay.h> |
| #include <linux/device.h> |
| #include <linux/fs.h> |
| #include <linux/kobject.h> |
| #include <linux/mfd/cros_ec.h> |
| #include <linux/mfd/cros_ec_commands.h> |
| #include <linux/mfd/cros_ec_dev.h> |
| #include <linux/module.h> |
| #include <linux/platform_device.h> |
| #include <linux/printk.h> |
| #include <linux/stat.h> |
| #include <linux/types.h> |
| #include <linux/uaccess.h> |
| |
| #include "cros_ec_dev.h" |
| |
| /* Accessor functions */ |
| |
| static ssize_t show_ec_reboot(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| int count = 0; |
| |
| count += scnprintf(buf + count, PAGE_SIZE - count, |
| "ro|rw|cancel|cold|disable-jump|hibernate"); |
| count += scnprintf(buf + count, PAGE_SIZE - count, |
| " [at-shutdown]\n"); |
| return count; |
| } |
| |
| static ssize_t store_ec_reboot(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| static const struct { |
| const char * const str; |
| uint8_t cmd; |
| uint8_t flags; |
| } words[] = { |
| {"cancel", EC_REBOOT_CANCEL, 0}, |
| {"ro", EC_REBOOT_JUMP_RO, 0}, |
| {"rw", EC_REBOOT_JUMP_RW, 0}, |
| {"cold", EC_REBOOT_COLD, 0}, |
| {"disable-jump", EC_REBOOT_DISABLE_JUMP, 0}, |
| {"hibernate", EC_REBOOT_HIBERNATE, 0}, |
| {"at-shutdown", -1, EC_REBOOT_FLAG_ON_AP_SHUTDOWN}, |
| }; |
| struct ec_params_reboot_ec param; |
| struct cros_ec_command msg = { 0 }; |
| int got_cmd = 0, offset = 0; |
| int i; |
| int ret; |
| struct cros_ec_dev *ec = container_of( |
| dev, struct cros_ec_dev, class_dev); |
| |
| param.flags = 0; |
| while (1) { |
| /* Find word to start scanning */ |
| while (buf[offset] & isspace(buf[offset])) |
| offset++; |
| if (!buf[offset]) |
| break; |
| |
| for (i = 0; i < ARRAY_SIZE(words); i++) { |
| if (!strncasecmp(words[i].str, buf+offset, |
| strlen(words[i].str))) { |
| if (words[i].flags) { |
| param.flags |= words[i].flags; |
| } else { |
| param.cmd = words[i].cmd; |
| got_cmd = 1; |
| } |
| break; |
| } |
| } |
| |
| /* On to the next word, if any */ |
| while (buf[offset] && !isspace(buf[offset])) |
| offset++; |
| } |
| |
| if (!got_cmd) |
| return -EINVAL; |
| |
| msg.command = EC_CMD_REBOOT_EC + ec->cmd_offset; |
| msg.outdata = (uint8_t *)¶m; |
| msg.outsize = sizeof(param); |
| ret = cros_ec_cmd_xfer_status(ec->ec_dev, &msg); |
| if (ret < 0) |
| return ret; |
| |
| return count; |
| } |
| |
| static ssize_t show_ec_version(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| static const char * const image_names[] = {"unknown", "RO", "RW"}; |
| struct ec_response_get_version r_ver; |
| struct ec_response_get_chip_info r_chip; |
| struct ec_response_board_version r_board; |
| struct cros_ec_command msg = { 0 }; |
| char r_build_string[EC_HOST_PARAM_SIZE]; |
| int ret; |
| int count = 0; |
| struct cros_ec_dev *ec = container_of( |
| dev, struct cros_ec_dev, class_dev); |
| |
| /* Get versions. RW may change. */ |
| msg.command = EC_CMD_GET_VERSION + ec->cmd_offset; |
| msg.indata = (uint8_t *)&r_ver; |
| msg.insize = sizeof(r_ver); |
| ret = cros_ec_cmd_xfer_status(ec->ec_dev, &msg); |
| if (ret < 0) |
| return ret; |
| |
| /* Strings should be null-terminated, but let's be sure. */ |
| r_ver.version_string_ro[sizeof(r_ver.version_string_ro) - 1] = '\0'; |
| r_ver.version_string_rw[sizeof(r_ver.version_string_rw) - 1] = '\0'; |
| count += scnprintf(buf + count, PAGE_SIZE - count, |
| "RO version: %s\n", r_ver.version_string_ro); |
| count += scnprintf(buf + count, PAGE_SIZE - count, |
| "RW version: %s\n", r_ver.version_string_rw); |
| count += scnprintf(buf + count, PAGE_SIZE - count, |
| "Firmware copy: %s\n", |
| (r_ver.current_image < ARRAY_SIZE(image_names) ? |
| image_names[r_ver.current_image] : "?")); |
| |
| /* Get build info. */ |
| msg.command = EC_CMD_GET_BUILD_INFO + ec->cmd_offset; |
| msg.indata = (uint8_t *)r_build_string; |
| msg.insize = sizeof(r_build_string); |
| ret = cros_ec_cmd_xfer(ec->ec_dev, &msg); |
| if (ret < 0) |
| count += scnprintf(buf + count, PAGE_SIZE - count, |
| "Build info: XFER ERROR %d\n", ret); |
| else if (msg.result != EC_RES_SUCCESS) |
| count += scnprintf(buf + count, PAGE_SIZE - count, |
| "Build info: EC error %d\n", msg.result); |
| else { |
| r_build_string[sizeof(r_build_string) - 1] = '\0'; |
| count += scnprintf(buf + count, PAGE_SIZE - count, |
| "Build info: %s\n", r_build_string); |
| } |
| |
| /* Get chip info. */ |
| msg.command = EC_CMD_GET_CHIP_INFO + ec->cmd_offset; |
| msg.indata = (uint8_t *)&r_chip; |
| msg.insize = sizeof(r_chip); |
| ret = cros_ec_cmd_xfer(ec->ec_dev, &msg); |
| if (ret < 0) |
| count += scnprintf(buf + count, PAGE_SIZE - count, |
| "Chip info: XFER ERROR %d\n", ret); |
| else if (msg.result != EC_RES_SUCCESS) |
| count += scnprintf(buf + count, PAGE_SIZE - count, |
| "Chip info: EC error %d\n", msg.result); |
| else { |
| r_chip.vendor[sizeof(r_chip.vendor) - 1] = '\0'; |
| r_chip.name[sizeof(r_chip.name) - 1] = '\0'; |
| r_chip.revision[sizeof(r_chip.revision) - 1] = '\0'; |
| count += scnprintf(buf + count, PAGE_SIZE - count, |
| "Chip vendor: %s\n", r_chip.vendor); |
| count += scnprintf(buf + count, PAGE_SIZE - count, |
| "Chip name: %s\n", r_chip.name); |
| count += scnprintf(buf + count, PAGE_SIZE - count, |
| "Chip revision: %s\n", r_chip.revision); |
| } |
| |
| /* Get board version */ |
| msg.command = EC_CMD_GET_BOARD_VERSION + ec->cmd_offset; |
| msg.indata = (uint8_t *)&r_board; |
| msg.insize = sizeof(r_board); |
| ret = cros_ec_cmd_xfer(ec->ec_dev, &msg); |
| if (ret < 0) |
| count += scnprintf(buf + count, PAGE_SIZE - count, |
| "Board version: XFER ERROR %d\n", ret); |
| else if (msg.result != EC_RES_SUCCESS) |
| count += scnprintf(buf + count, PAGE_SIZE - count, |
| "Board version: EC error %d\n", msg.result); |
| else { |
| count += scnprintf(buf + count, PAGE_SIZE - count, |
| "Board version: %d\n", |
| r_board.board_version); |
| } |
| |
| return count; |
| } |
| |
| static ssize_t show_ec_flashinfo(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct ec_response_flash_info resp; |
| struct cros_ec_command msg = { 0 }; |
| int ret; |
| struct cros_ec_dev *ec = container_of( |
| dev, struct cros_ec_dev, class_dev); |
| |
| /* The flash info shouldn't ever change, but ask each time anyway. */ |
| msg.command = EC_CMD_FLASH_INFO + ec->cmd_offset; |
| msg.indata = (uint8_t *)&resp; |
| msg.insize = sizeof(resp); |
| ret = cros_ec_cmd_xfer_status(ec->ec_dev, &msg); |
| if (ret < 0) |
| return ret; |
| |
| return scnprintf(buf, PAGE_SIZE, |
| "FlashSize %d\nWriteSize %d\n" |
| "EraseSize %d\nProtectSize %d\n", |
| resp.flash_size, resp.write_block_size, |
| resp.erase_block_size, resp.protect_block_size); |
| } |
| |
| /* Keyboard wake angle control */ |
| static ssize_t show_kb_wake_angle(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct ec_response_motion_sense resp; |
| struct ec_params_motion_sense req; |
| struct cros_ec_command msg = { 0 }; |
| int ret; |
| struct cros_ec_dev *ec = container_of( |
| dev, struct cros_ec_dev, class_dev); |
| |
| msg.command = EC_CMD_MOTION_SENSE_CMD + ec->cmd_offset; |
| msg.version = 2; |
| req.cmd = MOTIONSENSE_CMD_KB_WAKE_ANGLE; |
| req.kb_wake_angle.data = EC_MOTION_SENSE_NO_VALUE; |
| msg.outdata = (uint8_t *)&req; |
| msg.outsize = sizeof(req); |
| msg.indata = (uint8_t *)&resp; |
| msg.insize = sizeof(resp); |
| ret = cros_ec_cmd_xfer_status(ec->ec_dev, &msg); |
| if (ret < 0) |
| return ret; |
| return scnprintf(buf, PAGE_SIZE, "%d\n", resp.kb_wake_angle.ret); |
| } |
| |
| static ssize_t store_kb_wake_angle(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct ec_response_motion_sense resp; |
| struct ec_params_motion_sense req; |
| struct cros_ec_command msg = { 0 }; |
| int ret; |
| struct cros_ec_dev *ec = container_of( |
| dev, struct cros_ec_dev, class_dev); |
| uint16_t angle; |
| |
| ret = kstrtou16(buf, 0, &angle); |
| if (ret) |
| return ret; |
| |
| msg.command = EC_CMD_MOTION_SENSE_CMD + ec->cmd_offset; |
| msg.version = 2; |
| req.cmd = MOTIONSENSE_CMD_KB_WAKE_ANGLE; |
| req.kb_wake_angle.data = angle; |
| msg.outdata = (uint8_t *)&req; |
| msg.outsize = sizeof(req); |
| msg.indata = (uint8_t *)&resp; |
| msg.insize = sizeof(resp); |
| ret = cros_ec_cmd_xfer_status(ec->ec_dev, &msg); |
| if (ret < 0) |
| return ret; |
| return count; |
| } |
| |
| /* Module initialization */ |
| |
| static DEVICE_ATTR(reboot, S_IWUSR | S_IRUGO, show_ec_reboot, store_ec_reboot); |
| static DEVICE_ATTR(version, S_IRUGO, show_ec_version, NULL); |
| static DEVICE_ATTR(flashinfo, S_IRUGO, show_ec_flashinfo, NULL); |
| static DEVICE_ATTR(kb_wake_angle, S_IWUSR | S_IRUGO, |
| show_kb_wake_angle, store_kb_wake_angle); |
| |
| |
| static struct attribute *__ec_attrs[] = { |
| &dev_attr_kb_wake_angle.attr, |
| &dev_attr_reboot.attr, |
| &dev_attr_version.attr, |
| &dev_attr_flashinfo.attr, |
| NULL, |
| }; |
| |
| static umode_t cros_ec_ctrl_visible(struct kobject *kobj, |
| struct attribute *a, int n) |
| { |
| struct device *dev = container_of(kobj, struct device, kobj); |
| struct cros_ec_dev *ec = container_of( |
| dev, struct cros_ec_dev, class_dev); |
| |
| if (a == &dev_attr_kb_wake_angle.attr) { |
| if (ec->has_kb_wake_angle) |
| return a->mode; |
| else |
| return 0; |
| } else { |
| return a->mode; |
| } |
| } |
| |
| struct attribute_group cros_ec_attr_group = { |
| .attrs = __ec_attrs, |
| .is_visible = cros_ec_ctrl_visible, |
| }; |
| |