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msi-laptop: Detect 3G device exists by standard ec command

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Detect 3G device exists by standard ec command. Driver will not create the threeg sysfs
file and threeg rfkill interface if there have no internal 3G device in MSI notebook/netbook.

Signed-off-by: Lee, Chun-Yi <jlee@novell.com>
Cc: Lennart Poettering <mzxreary@0pointer.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Lee, Chun-Yi 2010-01-27 12:23:00 +08:00 committed by Greg Kroah-Hartman
parent ec766278ba
commit e22388e71b
1 changed files with 34 additions and 10 deletions
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44
drivers/platform/x86/msi-laptop.c
View file

@ -79,6 +79,8 @@
static int msi_laptop_resume(struct platform_device *device);
#define MSI_STANDARD_EC_DEVICES_EXISTS_ADDRESS 0x2f
static int force;
module_param(force, bool, 0);
MODULE_PARM_DESC(force, "Force driver load, ignore DMI data");
@ -89,6 +91,7 @@ MODULE_PARM_DESC(auto_brightness, "Enable automatic brightness control (0: disab
static bool old_ec_model;
static int wlan_s, bluetooth_s, threeg_s;
static int threeg_exists;
/* Some MSI 3G netbook only have one fn key to control Wlan/Bluetooth/3G,
* those netbook will load the SCM (windows app) to disable the original
@ -224,6 +227,20 @@ static int get_wireless_state_ec_standard(void)
return 0;
}
static int get_threeg_exists(void)
{
u8 rdata;
int result;
result = ec_read(MSI_STANDARD_EC_DEVICES_EXISTS_ADDRESS, &rdata);
if (result < 0)
return -1;
threeg_exists = !!(rdata & MSI_STANDARD_EC_3G_MASK);
return 0;
}
/* Backlight device stuff */
static int bl_get_brightness(struct backlight_device *b)
@ -561,15 +578,17 @@ static int rfkill_init(struct platform_device *sdev)
if (retval)
goto err_wlan;
rfk_threeg = rfkill_alloc("msi-threeg", &sdev->dev, RFKILL_TYPE_WWAN,
&rfkill_threeg_ops, NULL);
if (!rfk_threeg) {
retval = -ENOMEM;
goto err_threeg;
if (threeg_exists) {
rfk_threeg = rfkill_alloc("msi-threeg", &sdev->dev,
RFKILL_TYPE_WWAN, &rfkill_threeg_ops, NULL);
if (!rfk_threeg) {
retval = -ENOMEM;
goto err_threeg;
}
retval = rfkill_register(rfk_threeg);
if (retval)
goto err_threeg;
}
retval = rfkill_register(rfk_threeg);
if (retval)
goto err_threeg;
return 0;
@ -649,6 +668,9 @@ static int __init msi_init(void)
if (force || dmi_check_system(msi_dmi_table))
old_ec_model = 1;
if (!old_ec_model)
get_threeg_exists();
if (!old_ec_model && dmi_check_system(msi_load_scm_models_dmi_table))
load_scm_model = 1;
@ -694,7 +716,9 @@ static int __init msi_init(void)
goto fail_platform_device2;
if (!old_ec_model) {
ret = device_create_file(&msipf_device->dev, &dev_attr_threeg);
if (threeg_exists)
ret = device_create_file(&msipf_device->dev,
&dev_attr_threeg);
if (ret)
goto fail_platform_device2;
}
@ -733,7 +757,7 @@ static void __exit msi_cleanup(void)
{
sysfs_remove_group(&msipf_device->dev.kobj, &msipf_attribute_group);
if (!old_ec_model)
if (!old_ec_model && threeg_exists)
device_remove_file(&msipf_device->dev, &dev_attr_threeg);
platform_device_unregister(msipf_device);
platform_driver_unregister(&msipf_driver);