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authorMattia Dongili <malattia@linux.it>2009-12-17 00:08:36 +0900
committerLen Brown <len.brown@intel.com>2009-12-23 22:58:47 -0500
commit528809c35faebd8c50a4722c85ab8610725875cc (patch)
tree67ba535e6275f4a63111c494e6cd9aebef20d6dd /drivers/platform/x86/sony-laptop.c
parentd5a664a311c1957a75bec1808cae0f10d606c378 (diff)
downloadlinux-2.6.34-ux500-528809c35faebd8c50a4722c85ab8610725875cc.tar.gz
sony-laptop: enumerate rfkill devices using SN06
SN06 makes sure we get back a longer buffer which seems to be necessary going forward as the SNC devices describes more and more devices (or features more precisely). Moreover SN06 should be called with only the descriptor offset to make sure we hit the rfkill controlling function (F124 or F135) with a 0 argument to get a full list of features. Signed-off-by: Mattia Dongili <malattia@linux.it> Tested-by: Miguel Rodríguez Pérez <miguelrp@gmail.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/platform/x86/sony-laptop.c')
-rw-r--r--drivers/platform/x86/sony-laptop.c76
1 files changed, 57 insertions, 19 deletions
diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c
index 1144686a33f..49f3fe0ac59 100644
--- a/drivers/platform/x86/sony-laptop.c
+++ b/drivers/platform/x86/sony-laptop.c
@@ -1156,35 +1156,73 @@ static void sony_nc_rfkill_update()
}
}
-static int sony_nc_rfkill_setup(struct acpi_device *device)
+static void sony_nc_rfkill_setup(struct acpi_device *device)
{
- int result, ret;
+ int offset;
+ u8 dev_code, i;
+ acpi_status status;
+ struct acpi_object_list params;
+ union acpi_object in_obj;
+ union acpi_object *device_enum;
+ struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
- if (sony_find_snc_handle(0x124) == -1) {
- if (sony_find_snc_handle(0x135) == -1)
- return -1;
+ offset = sony_find_snc_handle(0x124);
+ if (offset == -1) {
+ offset = sony_find_snc_handle(0x135);
+ if (offset == -1)
+ return;
else
sony_rfkill_handle = 0x135;
} else
sony_rfkill_handle = 0x124;
+ dprintk("Found rkfill handle: 0x%.4x\n", sony_rfkill_handle);
- ret = sony_call_snc_handle(sony_rfkill_handle, 0xb00, &result);
- if (ret) {
- printk(KERN_INFO DRV_PFX
- "Unable to enumerate rfkill devices: %x\n", ret);
- return ret;
+ /* need to read the whole buffer returned by the acpi call to SN06
+ * here otherwise we may miss some features
+ */
+ params.count = 1;
+ params.pointer = &in_obj;
+ in_obj.type = ACPI_TYPE_INTEGER;
+ in_obj.integer.value = offset;
+ status = acpi_evaluate_object(sony_nc_acpi_handle, "SN06", &params,
+ &buffer);
+ if (ACPI_FAILURE(status)) {
+ dprintk("Radio device enumeration failed\n");
+ return;
}
- if (result & 0x1)
- sony_nc_setup_rfkill(device, SONY_WIFI);
- if (result & 0x2)
- sony_nc_setup_rfkill(device, SONY_BLUETOOTH);
- if (result & 0x1c)
- sony_nc_setup_rfkill(device, SONY_WWAN);
- if (result & 0x20)
- sony_nc_setup_rfkill(device, SONY_WIMAX);
+ device_enum = (union acpi_object *) buffer.pointer;
+ if (!device_enum || device_enum->type != ACPI_TYPE_BUFFER) {
+ printk(KERN_ERR "Invalid SN06 return object 0x%.2x\n",
+ device_enum->type);
+ goto out_no_enum;
+ }
- return 0;
+ /* the buffer is filled with magic numbers describing the devices
+ * available, 0xff terminates the enumeration
+ */
+ while ((dev_code = *(device_enum->buffer.pointer + i)) != 0xff &&
+ i < device_enum->buffer.length) {
+ i++;
+ dprintk("Radio devices, looking at 0x%.2x\n", dev_code);
+
+ if (dev_code == 0 && !sony_rfkill_devices[SONY_WIFI])
+ sony_nc_setup_rfkill(device, SONY_WIFI);
+
+ if (dev_code == 0x10 && !sony_rfkill_devices[SONY_BLUETOOTH])
+ sony_nc_setup_rfkill(device, SONY_BLUETOOTH);
+
+ if ((0xf0 & dev_code) == 0x20 &&
+ !sony_rfkill_devices[SONY_WWAN])
+ sony_nc_setup_rfkill(device, SONY_WWAN);
+
+ if (dev_code == 0x30 && !sony_rfkill_devices[SONY_WIMAX])
+ sony_nc_setup_rfkill(device, SONY_WIMAX);
+ }
+
+out_no_enum:
+ kfree(buffer.pointer);
+ return;
}
static int sony_nc_add(struct acpi_device *device)