diff options
Diffstat (limited to 'drivers/platform')
| -rw-r--r-- | drivers/platform/chrome/cros_ec_debugfs.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/drivers/platform/chrome/cros_ec_debugfs.c b/drivers/platform/chrome/cros_ec_debugfs.c index 539403022568..cc265ed8deb7 100644 --- a/drivers/platform/chrome/cros_ec_debugfs.c +++ b/drivers/platform/chrome/cros_ec_debugfs.c @@ -211,6 +211,58 @@ static int cros_ec_console_log_release(struct inode *inode, struct file *file) return 0; } +static ssize_t cros_ec_pdinfo_read(struct file *file, + char __user *user_buf, + size_t count, + loff_t *ppos) +{ + char read_buf[EC_USB_PD_MAX_PORTS * 40], *p = read_buf; + struct cros_ec_debugfs *debug_info = file->private_data; + struct cros_ec_device *ec_dev = debug_info->ec->ec_dev; + struct { + struct cros_ec_command msg; + union { + struct ec_response_usb_pd_control_v1 resp; + struct ec_params_usb_pd_control params; + }; + } __packed ec_buf; + struct cros_ec_command *msg; + struct ec_response_usb_pd_control_v1 *resp; + struct ec_params_usb_pd_control *params; + int i; + + msg = &ec_buf.msg; + params = (struct ec_params_usb_pd_control *)msg->data; + resp = (struct ec_response_usb_pd_control_v1 *)msg->data; + + msg->command = EC_CMD_USB_PD_CONTROL; + msg->version = 1; + msg->insize = sizeof(*resp); + msg->outsize = sizeof(*params); + + /* + * Read status from all PD ports until failure, typically caused + * by attempting to read status on a port that doesn't exist. + */ + for (i = 0; i < EC_USB_PD_MAX_PORTS; ++i) { + params->port = i; + params->role = 0; + params->mux = 0; + params->swap = 0; + + if (cros_ec_cmd_xfer_status(ec_dev, msg) < 0) + break; + + p += scnprintf(p, sizeof(read_buf) + read_buf - p, + "p%d: %s en:%.2x role:%.2x pol:%.2x\n", i, + resp->state, resp->enabled, resp->role, + resp->polarity); + } + + return simple_read_from_buffer(user_buf, count, ppos, + read_buf, p - read_buf); +} + const struct file_operations cros_ec_console_log_fops = { .owner = THIS_MODULE, .open = cros_ec_console_log_open, @@ -220,6 +272,13 @@ const struct file_operations cros_ec_console_log_fops = { .release = cros_ec_console_log_release, }; +const struct file_operations cros_ec_pdinfo_fops = { + .owner = THIS_MODULE, + .open = simple_open, + .read = cros_ec_pdinfo_read, + .llseek = default_llseek, +}; + static int ec_read_version_supported(struct cros_ec_dev *ec) { struct ec_params_get_cmd_versions_v1 *params; @@ -355,6 +414,15 @@ free: return ret; } +static int cros_ec_create_pdinfo(struct cros_ec_debugfs *debug_info) +{ + if (!debugfs_create_file("pdinfo", 0444, debug_info->dir, debug_info, + &cros_ec_pdinfo_fops)) + return -ENOMEM; + + return 0; +} + int cros_ec_debugfs_init(struct cros_ec_dev *ec) { struct cros_ec_platform *ec_platform = dev_get_platdata(ec->dev); @@ -379,6 +447,10 @@ int cros_ec_debugfs_init(struct cros_ec_dev *ec) if (ret) goto remove_debugfs; + ret = cros_ec_create_pdinfo(debug_info); + if (ret) + goto remove_debugfs; + ec->debug_info = debug_info; return 0; |