Skip to content

Commit

Permalink
ideapad: add debugfs support
Browse files Browse the repository at this point in the history 
Add two nodes in debugfs which shows cfg value and its meaning,
and status info read from VPC2004.

Signed-off-by: Ike Panhc <ike.pan@canonical.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
  • Loading branch information
Ike Panhc authored and Matthew Garrett committed Oct 24, 2011
1 parent f43d9ec commit 773e320
Show file tree
Hide file tree
Showing 2 changed files with 171 additions and 0 deletions.
19 changes: 19 additions & 0 deletions Documentation/ABI/testing/debugfs-ideapad
View file
Original file line number Diff line number Diff line change
@@ -0,0 +1,19 @@
What: /sys/kernel/debug/ideapad/cfg
Date: Sep 2011
KernelVersion: 3.2
Contact: Ike Panhc <ike.pan@canonical.com>
Description:

cfg shows the return value of _CFG method in VPC2004 device. It tells machine
capability and what graphic component within the machine.


What: /sys/kernel/debug/ideapad/status
Date: Sep 2011
KernelVersion: 3.2
Contact: Ike Panhc <ike.pan@canonical.com>
Description:

status shows infos we can read and tells its meaning and value.


152 changes: 152 additions & 0 deletions drivers/platform/x86/ideapad-laptop.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -34,6 +34,8 @@
#include <linux/input/sparse-keymap.h>
#include <linux/backlight.h>
#include <linux/fb.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>

#define IDEAPAD_RFKILL_DEV_NUM (3)

Expand Down Expand Up @@ -71,10 +73,12 @@ struct ideapad_private {
struct platform_device *platform_device;
struct input_dev *inputdev;
struct backlight_device *blightdev;
struct dentry *debug;
unsigned long cfg;
};

static acpi_handle ideapad_handle;
static struct ideapad_private *ideapad_priv;
static bool no_bt_rfkill;
module_param(no_bt_rfkill, bool, 0444);
MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");
Expand Down Expand Up @@ -187,6 +191,146 @@ static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
return -1;
}

/*
* debugfs
*/
#define DEBUGFS_EVENT_LEN (4096)
static int debugfs_status_show(struct seq_file *s, void *data)
{
unsigned long value;

if (!read_ec_data(ideapad_handle, VPCCMD_R_BL_MAX, &value))
seq_printf(s, "Backlight max:\t%lu\n", value);
if (!read_ec_data(ideapad_handle, VPCCMD_R_BL, &value))
seq_printf(s, "Backlight now:\t%lu\n", value);
if (!read_ec_data(ideapad_handle, VPCCMD_R_BL_POWER, &value))
seq_printf(s, "BL power value:\t%s\n", value ? "On" : "Off");
seq_printf(s, "=====================\n");

if (!read_ec_data(ideapad_handle, VPCCMD_R_RF, &value))
seq_printf(s, "Radio status:\t%s(%lu)\n",
value ? "On" : "Off", value);
if (!read_ec_data(ideapad_handle, VPCCMD_R_WIFI, &value))
seq_printf(s, "Wifi status:\t%s(%lu)\n",
value ? "On" : "Off", value);
if (!read_ec_data(ideapad_handle, VPCCMD_R_BT, &value))
seq_printf(s, "BT status:\t%s(%lu)\n",
value ? "On" : "Off", value);
if (!read_ec_data(ideapad_handle, VPCCMD_R_3G, &value))
seq_printf(s, "3G status:\t%s(%lu)\n",
value ? "On" : "Off", value);
seq_printf(s, "=====================\n");

if (!read_ec_data(ideapad_handle, VPCCMD_R_TOUCHPAD, &value))
seq_printf(s, "Touchpad status:%s(%lu)\n",
value ? "On" : "Off", value);
if (!read_ec_data(ideapad_handle, VPCCMD_R_CAMERA, &value))
seq_printf(s, "Camera status:\t%s(%lu)\n",
value ? "On" : "Off", value);

return 0;
}

static int debugfs_status_open(struct inode *inode, struct file *file)
{
return single_open(file, debugfs_status_show, NULL);
}

static const struct file_operations debugfs_status_fops = {
.owner = THIS_MODULE,
.open = debugfs_status_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};

static int debugfs_cfg_show(struct seq_file *s, void *data)
{
if (!ideapad_priv) {
seq_printf(s, "cfg: N/A\n");
} else {
seq_printf(s, "cfg: 0x%.8lX\n\nCapability: ",
ideapad_priv->cfg);
if (test_bit(CFG_BT_BIT, &ideapad_priv->cfg))
seq_printf(s, "Bluetooth ");
if (test_bit(CFG_3G_BIT, &ideapad_priv->cfg))
seq_printf(s, "3G ");
if (test_bit(CFG_WIFI_BIT, &ideapad_priv->cfg))
seq_printf(s, "Wireless ");
if (test_bit(CFG_CAMERA_BIT, &ideapad_priv->cfg))
seq_printf(s, "Camera ");
seq_printf(s, "\nGraphic: ");
switch ((ideapad_priv->cfg)&0x700) {
case 0x100:
seq_printf(s, "Intel");
break;
case 0x200:
seq_printf(s, "ATI");
break;
case 0x300:
seq_printf(s, "Nvidia");
break;
case 0x400:
seq_printf(s, "Intel and ATI");
break;
case 0x500:
seq_printf(s, "Intel and Nvidia");
break;
}
seq_printf(s, "\n");
}
return 0;
}

static int debugfs_cfg_open(struct inode *inode, struct file *file)
{
return single_open(file, debugfs_cfg_show, NULL);
}

static const struct file_operations debugfs_cfg_fops = {
.owner = THIS_MODULE,
.open = debugfs_cfg_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};

static int __devinit ideapad_debugfs_init(struct ideapad_private *priv)
{
struct dentry *node;

priv->debug = debugfs_create_dir("ideapad", NULL);
if (priv->debug == NULL) {
pr_err("failed to create debugfs directory");
goto errout;
}

node = debugfs_create_file("cfg", S_IRUGO, priv->debug, NULL,
&debugfs_cfg_fops);
if (!node) {
pr_err("failed to create cfg in debugfs");
goto errout;
}

node = debugfs_create_file("status", S_IRUGO, priv->debug, NULL,
&debugfs_status_fops);
if (!node) {
pr_err("failed to create event in debugfs");
goto errout;
}

return 0;

errout:
return -ENOMEM;
}

static void ideapad_debugfs_exit(struct ideapad_private *priv)
{
debugfs_remove_recursive(priv->debug);
priv->debug = NULL;
}

/*
* sysfs
*/
Expand Down Expand Up @@ -573,13 +717,18 @@ static int __devinit ideapad_acpi_add(struct acpi_device *adevice)
if (!priv)
return -ENOMEM;
dev_set_drvdata(&adevice->dev, priv);
ideapad_priv = priv;
ideapad_handle = adevice->handle;
priv->cfg = cfg;

ret = ideapad_platform_init(priv);
if (ret)
goto platform_failed;

ret = ideapad_debugfs_init(priv);
if (ret)
goto debugfs_failed;

ret = ideapad_input_init(priv);
if (ret)
goto input_failed;
Expand All @@ -605,6 +754,8 @@ static int __devinit ideapad_acpi_add(struct acpi_device *adevice)
ideapad_unregister_rfkill(adevice, i);
ideapad_input_exit(priv);
input_failed:
ideapad_debugfs_exit(priv);
debugfs_failed:
ideapad_platform_exit(priv);
platform_failed:
kfree(priv);
Expand All @@ -620,6 +771,7 @@ static int __devexit ideapad_acpi_remove(struct acpi_device *adevice, int type)
for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
ideapad_unregister_rfkill(adevice, i);
ideapad_input_exit(priv);
ideapad_debugfs_exit(priv);
ideapad_platform_exit(priv);
dev_set_drvdata(&adevice->dev, NULL);
kfree(priv);
Expand Down

0 comments on commit 773e320

Please sign in to comment.