diff mbox

[2/3] Add rfkill support to compal-laptop

Message ID 1250706969-10382-1-git-send-email-Mario_Limonciello@Dell.com (mailing list archive)
State RFC, archived
Headers show

Commit Message

Mario Limonciello Aug. 19, 2009, 6:36 p.m. UTC 
Signed-off-by: Mario Limonciello <Mario_Limonciello@Dell.com>
Reviewed-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
---
 drivers/platform/x86/compal-laptop.c |   87 +++++++++++++++++++++++++++++++++-
 1 files changed, 85 insertions(+), 2 deletions(-)

Comments

Johannes Berg Aug. 19, 2009, 6:42 p.m. UTC | #1 
On Wed, 2009-08-19 at 13:36 -0500, Mario Limonciello wrote:
> Signed-off-by: Mario Limonciello <Mario_Limonciello@Dell.com>
> Reviewed-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>

> +	ret = setup_rfkill();
> +	if (ret)
> +		goto fail_rfkill;
> +
>  	printk(KERN_INFO "compal-laptop: driver "COMPAL_DRIVER_VERSION
>  		" successfully loaded.\n");
>  
>  	return 0;
>  
> +fail_rfkill:
>  fail_platform_device2:

Isn't that missing sysfs_remove_group()?

johannes
Mario Limonciello Aug. 19, 2009, 6:47 p.m. UTC | #2 
Johannes:

Johannes Berg wrote:
> On Wed, 2009-08-19 at 13:36 -0500, Mario Limonciello wrote:
>   
>
>   
>
> Isn't that missing sysfs_remove_group()?
>
> johannes
>   
The third patch in the (updated) series is dropping the sysfs bits, so
sysfs_remove_group is removed there.
Alan Jenkins Aug. 20, 2009, 8:52 a.m. UTC | #3 
On 8/19/09, Mario Limonciello <mario_limonciello@dell.com> wrote:
> Johannes:
>
> Johannes Berg wrote:
>> On Wed, 2009-08-19 at 13:36 -0500, Mario Limonciello wrote:
>>
>>
>>
>>
>> Isn't that missing sysfs_remove_group()?
>>
>> johannes
>>
> The third patch in the (updated) series is dropping the sysfs bits, so
> sysfs_remove_group is removed there.

That's not ideal.  Each patch should stand on its own; it's bad form
to introduce a bug in one patch and fix it in the next one.  Even
something obscure like omitting to free the sysfs group when
setup_rfkill() fails.

I would suggest merging these two patches into one. That would avoid
adding sysfs_remove_group() in this patch, just to remove it in the
next one.  It also avoids the question in this patch, of what happens
to the rfkill interface if you write to the sysfs file.

Alan
--
To unsubscribe from this list: send the line "unsubscribe linux-acpi" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
diff mbox

Patch

diff --git a/drivers/platform/x86/compal-laptop.c b/drivers/platform/x86/compal-laptop.c
index c1c8c03..da7ead6 100644
--- a/drivers/platform/x86/compal-laptop.c
+++ b/drivers/platform/x86/compal-laptop.c
@@ -52,6 +52,7 @@ 
 #include <linux/backlight.h>
 #include <linux/platform_device.h>
 #include <linux/autoconf.h>
+#include <linux/rfkill.h>
 
 #define COMPAL_DRIVER_VERSION "0.2.6"
 
@@ -64,6 +65,10 @@ 
 #define WLAN_MASK	0x01
 #define BT_MASK 	0x02
 
+static struct rfkill *wifi_rfkill;
+static struct rfkill *bt_rfkill;
+static struct platform_device *compal_device;
+
 static int force;
 module_param(force, bool, 0);
 MODULE_PARM_DESC(force, "Force driver load, ignore DMI data");
@@ -89,6 +94,77 @@  static int get_lcd_level(void)
 	return (int) result;
 }
 
+static int compal_rfkill_set(void *data, bool blocked)
+{
+	unsigned long radio = (unsigned long) data;
+	u8 result, value;
+
+	ec_read(COMPAL_EC_COMMAND_WIRELESS, &result);
+
+	if (!blocked)
+		value = (u8) (result | radio);
+	else
+		value = (u8) (result & ~radio);
+	ec_write(COMPAL_EC_COMMAND_WIRELESS, value);
+
+	return 0;
+}
+
+static void compal_rfkill_poll(struct rfkill *rfkill, void *data)
+{
+	u8 result;
+	bool hw_blocked;
+
+	ec_read(COMPAL_EC_COMMAND_WIRELESS, &result);
+
+	hw_blocked = !(result & KILLSWITCH_MASK);
+	rfkill_set_hw_state(rfkill, hw_blocked);
+}
+
+static const struct rfkill_ops compal_rfkill_ops = {
+	.poll = compal_rfkill_poll,
+	.set_block = compal_rfkill_set,
+};
+
+static int setup_rfkill(void)
+{
+	int ret;
+
+	wifi_rfkill = rfkill_alloc("compal-wifi", &compal_device->dev,
+				RFKILL_TYPE_WLAN, &compal_rfkill_ops,
+				(void *) WLAN_MASK);
+	if (!wifi_rfkill)
+		return -ENOMEM;
+
+	ret = rfkill_register(wifi_rfkill);
+	if (ret)
+		goto err_wifi;
+
+	bt_rfkill = rfkill_alloc("compal-bluetooth", &compal_device->dev,
+				RFKILL_TYPE_BLUETOOTH, &compal_rfkill_ops,
+				(void *) BT_MASK);
+	if (!bt_rfkill) {
+		ret = -ENOMEM;
+		goto err_allocate_bt;
+	}
+	ret = rfkill_register(bt_rfkill);
+	if (ret)
+		goto err_register_bt;
+
+	return 0;
+
+err_register_bt:
+	rfkill_destroy(bt_rfkill);
+
+err_allocate_bt:
+	rfkill_unregister(wifi_rfkill);
+
+err_wifi:
+	rfkill_destroy(wifi_rfkill);
+
+	return ret;
+}
+
 static int set_wlan_state(int state)
 {
 	u8 result, value;
@@ -258,8 +334,6 @@  static struct platform_driver compal_driver = {
 	}
 };
 
-static struct platform_device *compal_device;
-
 /* Initialization */
 
 static int dmi_check_cb(const struct dmi_system_id *id)
@@ -397,11 +471,16 @@  static int __init compal_init(void)
 	if (ret)
 		goto fail_platform_device2;
 
+	ret = setup_rfkill();
+	if (ret)
+		goto fail_rfkill;
+
 	printk(KERN_INFO "compal-laptop: driver "COMPAL_DRIVER_VERSION
 		" successfully loaded.\n");
 
 	return 0;
 
+fail_rfkill:
 fail_platform_device2:
 
 	platform_device_del(compal_device);
@@ -428,6 +507,10 @@  static void __exit compal_cleanup(void)
 	platform_device_unregister(compal_device);
 	platform_driver_unregister(&compal_driver);
 	backlight_device_unregister(compalbl_device);
+	rfkill_unregister(wifi_rfkill);
+	rfkill_destroy(wifi_rfkill);
+	rfkill_unregister(bt_rfkill);
+	rfkill_destroy(bt_rfkill);
 
 	printk(KERN_INFO "compal-laptop: driver unloaded.\n");
 }