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Subject[PATCH 60/62] msi-laptop: Detect 3G device exists by standard ec command
Date
From: Lee, Chun-Yi <jlee@novell.com>

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>
---
drivers/platform/x86/msi-laptop.c | 44 ++++++++++++++++++++++++++++--------
1 files changed, 34 insertions(+), 10 deletions(-)
diff --git a/drivers/platform/x86/msi-laptop.c b/drivers/platform/x86/msi-laptop.c
index af1b62f..c2b05da 100644
--- a/drivers/platform/x86/msi-laptop.c
+++ b/drivers/platform/x86/msi-laptop.c
@@ -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);
--
1.7.0.1


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