#include <linux/ctype.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/fs.h>
#include <linux/kobject.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/platform_device.h>
#include <linux/printk.h>
#include <linux/slab.h>
#include <linux/stat.h>
#include <linux/types.h>
#include <linux/uaccess.h>
#define DRV_NAME "cros-ec-sysfs"
static ssize_t reboot_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
int count = 0;
count += sysfs_emit_at(buf, count,
"ro|rw|cancel|cold|disable-jump|hibernate|cold-ap-off");
count += sysfs_emit_at(buf, count, " [at-shutdown]\n");
return count;
}
static ssize_t reboot_store(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-ap-off", EC_REBOOT_COLD_AP_OFF, 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 cros_ec_command *msg;
struct ec_params_reboot_ec *param;
int got_cmd = 0, offset = 0;
int i;
int ret;
struct cros_ec_dev *ec = to_cros_ec_dev(dev);
msg = kmalloc(sizeof(*msg) + sizeof(*param), GFP_KERNEL);
if (!msg)
return -ENOMEM;
param = (struct ec_params_reboot_ec *)msg->data;
param->flags = 0;
while (1) {
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;
}
}
while (buf[offset] && !isspace(buf[offset]))
offset++;
}
if (!got_cmd) {
count = -EINVAL;
goto exit;
}
msg->version = 0;
msg->command = EC_CMD_REBOOT_EC + ec->cmd_offset;
msg->outsize = sizeof(*param);
msg->insize = 0;
ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
if (ret < 0)
count = ret;
exit:
kfree(msg);
return count;
}
static ssize_t version_show(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;
int ret;
int count = 0;
struct cros_ec_dev *ec = to_cros_ec_dev(dev);
msg = kmalloc(sizeof(*msg) + EC_HOST_PARAM_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
msg->version = 0;
msg->command = EC_CMD_GET_VERSION + ec->cmd_offset;
msg->insize = sizeof(*r_ver);
msg->outsize = 0;
ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
if (ret < 0) {
count = ret;
goto exit;
}
r_ver = (struct ec_response_get_version *)msg->data;
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 += sysfs_emit_at(buf, count, "RO version: %s\n", r_ver->version_string_ro);
count += sysfs_emit_at(buf, count, "RW version: %s\n", r_ver->version_string_rw);
count += sysfs_emit_at(buf, count, "Firmware copy: %s\n",
(r_ver->current_image < ARRAY_SIZE(image_names) ?
image_names[r_ver->current_image] : "?"));
msg->command = EC_CMD_GET_BUILD_INFO + ec->cmd_offset;
msg->insize = EC_HOST_PARAM_SIZE;
ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
if (ret < 0) {
count += sysfs_emit_at(buf, count,
"Build info: XFER / EC ERROR %d / %d\n",
ret, msg->result);
} else {
msg->data[EC_HOST_PARAM_SIZE - 1] = '\0';
count += sysfs_emit_at(buf, count, "Build info: %s\n", msg->data);
}
msg->command = EC_CMD_GET_CHIP_INFO + ec->cmd_offset;
msg->insize = sizeof(*r_chip);
ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
if (ret < 0) {
count += sysfs_emit_at(buf, count,
"Chip info: XFER / EC ERROR %d / %d\n",
ret, msg->result);
} else {
r_chip = (struct ec_response_get_chip_info *)msg->data;
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 += sysfs_emit_at(buf, count, "Chip vendor: %s\n", r_chip->vendor);
count += sysfs_emit_at(buf, count, "Chip name: %s\n", r_chip->name);
count += sysfs_emit_at(buf, count, "Chip revision: %s\n", r_chip->revision);
}
msg->command = EC_CMD_GET_BOARD_VERSION + ec->cmd_offset;
msg->insize = sizeof(*r_board);
ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
if (ret < 0) {
count += sysfs_emit_at(buf, count,
"Board version: XFER / EC ERROR %d / %d\n",
ret, msg->result);
} else {
r_board = (struct ec_response_board_version *)msg->data;
count += sysfs_emit_at(buf, count,
"Board version: %d\n",
r_board->board_version);
}
exit:
kfree(msg);
return count;
}
static ssize_t flashinfo_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ec_response_flash_info *resp;
struct cros_ec_command *msg;
int ret;
struct cros_ec_dev *ec = to_cros_ec_dev(dev);
msg = kmalloc(sizeof(*msg) + sizeof(*resp), GFP_KERNEL);
if (!msg)
return -ENOMEM;
msg->version = 0;
msg->command = EC_CMD_FLASH_INFO + ec->cmd_offset;
msg->insize = sizeof(*resp);
msg->outsize = 0;
ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
if (ret < 0)
goto exit;
resp = (struct ec_response_flash_info *)msg->data;
ret = sysfs_emit(buf,
"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);
exit:
kfree(msg);
return ret;
}
static ssize_t kb_wake_angle_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct cros_ec_dev *ec = to_cros_ec_dev(dev);
struct ec_response_motion_sense *resp;
struct ec_params_motion_sense *param;
struct cros_ec_command *msg;
int ret;
msg = kmalloc(sizeof(*msg) + EC_HOST_PARAM_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
param = (struct ec_params_motion_sense *)msg->data;
msg->command = EC_CMD_MOTION_SENSE_CMD + ec->cmd_offset;
msg->version = 2;
param->cmd = MOTIONSENSE_CMD_KB_WAKE_ANGLE;
param->kb_wake_angle.data = EC_MOTION_SENSE_NO_VALUE;
msg->outsize = sizeof(*param);
msg->insize = sizeof(*resp);
ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
if (ret < 0)
goto exit;
resp = (struct ec_response_motion_sense *)msg->data;
ret = sysfs_emit(buf, "%d\n", resp->kb_wake_angle.ret);
exit:
kfree(msg);
return ret;
}
static ssize_t kb_wake_angle_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct cros_ec_dev *ec = to_cros_ec_dev(dev);
struct ec_params_motion_sense *param;
struct cros_ec_command *msg;
u16 angle;
int ret;
ret = kstrtou16(buf, 0, &angle);
if (ret)
return ret;
msg = kmalloc(sizeof(*msg) + EC_HOST_PARAM_SIZE, GFP_KERNEL);
if (!msg)
return -ENOMEM;
param = (struct ec_params_motion_sense *)msg->data;
msg->command = EC_CMD_MOTION_SENSE_CMD + ec->cmd_offset;
msg->version = 2;
param->cmd = MOTIONSENSE_CMD_KB_WAKE_ANGLE;
param->kb_wake_angle.data = angle;
msg->outsize = sizeof(*param);
msg->insize = sizeof(struct ec_response_motion_sense);
ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
kfree(msg);
if (ret < 0)
return ret;
return count;
}
static ssize_t usbpdmuxinfo_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct cros_ec_dev *ec = to_cros_ec_dev(dev);
ssize_t count = 0;
struct ec_response_usb_pd_ports resp_pd_ports;
int ret;
int i;
ret = cros_ec_cmd(ec->ec_dev, 0, EC_CMD_USB_PD_PORTS, NULL, 0,
&resp_pd_ports, sizeof(resp_pd_ports));
if (ret < 0)
return -EIO;
for (i = 0; i < resp_pd_ports.num_ports; i++) {
struct ec_response_usb_pd_mux_info resp_mux;
struct ec_params_usb_pd_mux_info req = {
.port = i,
};
ret = cros_ec_cmd(ec->ec_dev, 0, EC_CMD_USB_PD_MUX_INFO,
&req, sizeof(req), &resp_mux, sizeof(resp_mux));
if (ret >= 0) {
count += sysfs_emit_at(buf, count, "Port %d:", i);
count += sysfs_emit_at(buf, count, " USB=%d",
!!(resp_mux.flags & USB_PD_MUX_USB_ENABLED));
count += sysfs_emit_at(buf, count, " DP=%d",
!!(resp_mux.flags & USB_PD_MUX_DP_ENABLED));
count += sysfs_emit_at(buf, count, " POLARITY=%s",
(resp_mux.flags & USB_PD_MUX_POLARITY_INVERTED) ?
"INVERTED" : "NORMAL");
count += sysfs_emit_at(buf, count, " HPD_IRQ=%d",
!!(resp_mux.flags & USB_PD_MUX_HPD_IRQ));
count += sysfs_emit_at(buf, count, " HPD_LVL=%d",
!!(resp_mux.flags & USB_PD_MUX_HPD_LVL));
count += sysfs_emit_at(buf, count, " SAFE=%d",
!!(resp_mux.flags & USB_PD_MUX_SAFE_MODE));
count += sysfs_emit_at(buf, count, " TBT=%d",
!!(resp_mux.flags & USB_PD_MUX_TBT_COMPAT_ENABLED));
count += sysfs_emit_at(buf, count, " USB4=%d\n",
!!(resp_mux.flags & USB_PD_MUX_USB4_ENABLED));
}
}
return count ? : -EIO;
}
static ssize_t ap_mode_entry_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct cros_ec_dev *ec = to_cros_ec_dev(dev);
const bool ap_driven_altmode = cros_ec_check_features(
ec, EC_FEATURE_TYPEC_REQUIRE_AP_MODE_ENTRY);
return sysfs_emit(buf, "%s\n", ap_driven_altmode ? "yes" : "no");
}
static DEVICE_ATTR_RW(reboot);
static DEVICE_ATTR_RO(version);
static DEVICE_ATTR_RO(flashinfo);
static DEVICE_ATTR_RW(kb_wake_angle);
static DEVICE_ATTR_RO(usbpdmuxinfo);
static DEVICE_ATTR_RO(ap_mode_entry);
static struct attribute *__ec_attrs[] = {
&dev_attr_kb_wake_angle.attr,
&dev_attr_reboot.attr,
&dev_attr_version.attr,
&dev_attr_flashinfo.attr,
&dev_attr_usbpdmuxinfo.attr,
&dev_attr_ap_mode_entry.attr,
NULL,
};
static umode_t cros_ec_ctrl_visible(struct kobject *kobj,
struct attribute *a, int n)
{
struct device *dev = kobj_to_dev(kobj);
struct cros_ec_dev *ec = to_cros_ec_dev(dev);
if (a == &dev_attr_kb_wake_angle.attr && !ec->has_kb_wake_angle)
return 0;
if (a == &dev_attr_usbpdmuxinfo.attr ||
a == &dev_attr_ap_mode_entry.attr) {
struct cros_ec_platform *ec_platform = dev_get_platdata(ec->dev);
if (strcmp(ec_platform->ec_name, CROS_EC_DEV_NAME))
return 0;
}
return a->mode;
}
static const struct attribute_group cros_ec_attr_group = {
.attrs = __ec_attrs,
.is_visible = cros_ec_ctrl_visible,
};
static int cros_ec_sysfs_probe(struct platform_device *pd)
{
struct cros_ec_dev *ec_dev = dev_get_drvdata(pd->dev.parent);
struct device *dev = &pd->dev;
int ret;
ret = sysfs_create_group(&ec_dev->class_dev.kobj, &cros_ec_attr_group);
if (ret < 0)
dev_err(dev, "failed to create attributes. err=%d\n", ret);
return ret;
}
static void cros_ec_sysfs_remove(struct platform_device *pd)
{
struct cros_ec_dev *ec_dev = dev_get_drvdata(pd->dev.parent);
sysfs_remove_group(&ec_dev->class_dev.kobj, &cros_ec_attr_group);
}
static const struct platform_device_id cros_ec_sysfs_id[] = {
{ DRV_NAME, 0 },
{}
};
MODULE_DEVICE_TABLE(platform, cros_ec_sysfs_id);
static struct platform_driver cros_ec_sysfs_driver = {
.driver = {
.name = DRV_NAME,
},
.probe = cros_ec_sysfs_probe,
.remove = cros_ec_sysfs_remove,
.id_table = cros_ec_sysfs_id,
};
module_platform_driver(cros_ec_sysfs_driver);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Expose the ChromeOS EC through sysfs");
