diff options
author | Corentin Chary <corentincj@iksaif.net> | 2011-02-06 15:28:31 +0300 |
---|---|---|
committer | Matthew Garrett <mjg@redhat.com> | 2011-03-28 14:05:16 +0400 |
commit | 5c95638d115f9c6661fff254b3beb14b19f88e41 (patch) | |
tree | a8028278fafc70dc2c363b437ab88a4e54124a5c /drivers/platform | |
parent | 7898cf1a3665d22c4d16308f73e981c6464be81b (diff) | |
download | linux-5c95638d115f9c6661fff254b3beb14b19f88e41.tar.xz |
eeepc-wmi: add an helper using simple return codes
eeepc_wmi_get_devstate returns an acpi_status, so each
call need extra logic to handle the return code. This
patch add a simple getter, returning a boolean (or a
negative error code).
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Diffstat (limited to 'drivers/platform')
-rw-r--r-- | drivers/platform/x86/eeepc-wmi.c | 96 |
1 files changed, 39 insertions, 57 deletions
diff --git a/drivers/platform/x86/eeepc-wmi.c b/drivers/platform/x86/eeepc-wmi.c index d8234582b541..de501fb3d1bb 100644 --- a/drivers/platform/x86/eeepc-wmi.c +++ b/drivers/platform/x86/eeepc-wmi.c @@ -257,6 +257,29 @@ static acpi_status eeepc_wmi_set_devstate(u32 dev_id, u32 ctrl_param, return status; } +/* Helper for special devices with magic return codes */ +static int eeepc_wmi_get_devstate_simple(u32 dev_id) +{ + u32 retval = 0; + acpi_status status; + + status = eeepc_wmi_get_devstate(dev_id, &retval); + + if (ACPI_FAILURE(status)) + return -EINVAL; + + /* If the device is present, DSTS will always set some bits + * 0x00070000 - 1110000000000000000 - device supported + * 0x00060000 - 1100000000000000000 - not supported + * 0x00020000 - 0100000000000000000 - device supported + * 0x00010000 - 0010000000000000000 - not supported / special mode ? + */ + if (!retval || retval == 0x00060000) + return -ENODEV; + + return retval & 0x1; +} + /* * LEDs */ @@ -290,23 +313,7 @@ static void tpd_led_set(struct led_classdev *led_cdev, static int read_tpd_state(struct eeepc_wmi *eeepc) { - u32 retval; - acpi_status status; - - status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_TPDLED, &retval); - - if (ACPI_FAILURE(status)) - return -1; - else if (!retval || retval == 0x00060000) - /* - * if touchpad led is present, DSTS will set some bits, - * usually 0x00020000. - * 0x00060000 means that the device is not supported - */ - return -ENODEV; - else - /* Status is stored in the first bit */ - return retval & 0x1; + return eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_TPDLED); } static enum led_brightness tpd_led_get(struct led_classdev *led_cdev) @@ -358,15 +365,11 @@ static void eeepc_wmi_led_exit(struct eeepc_wmi *eeepc) */ static bool eeepc_wlan_rfkill_blocked(struct eeepc_wmi *eeepc) { - u32 retval; - acpi_status status; - - status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_WLAN, &retval); + int result = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WLAN); - if (ACPI_FAILURE(status)) + if (result < 0) return false; - - return !(retval & 0x1); + return !result; } static void eeepc_rfkill_hotplug(struct eeepc_wmi *eeepc) @@ -494,19 +497,12 @@ static void eeepc_unregister_rfkill_notifier(struct eeepc_wmi *eeepc, static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value) { - u32 retval; - acpi_status status; - - status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_WLAN, &retval); - - if (ACPI_FAILURE(status)) - return -EIO; + int result = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WLAN); - if (!retval || retval == 0x00060000) - return -ENODEV; - else - *value = (retval & 0x1); + if (result < 0) + return result; + *value = !!result; return 0; } @@ -601,15 +597,14 @@ static int eeepc_rfkill_set(void *data, bool blocked) static void eeepc_rfkill_query(struct rfkill *rfkill, void *data) { int dev_id = (unsigned long)data; - u32 retval; - acpi_status status; + int result; - status = eeepc_wmi_get_devstate(dev_id, &retval); + result = eeepc_wmi_get_devstate_simple(dev_id); - if (ACPI_FAILURE(status)) + if (result < 0) return ; - rfkill_set_sw_state(rfkill, !(retval & 0x1)); + rfkill_set_sw_state(rfkill, !result); } static int eeepc_rfkill_wlan_set(void *data, bool blocked) @@ -650,23 +645,10 @@ static int eeepc_new_rfkill(struct eeepc_wmi *eeepc, const char *name, enum rfkill_type type, int dev_id) { - int result; - u32 retval; - acpi_status status; - - status = eeepc_wmi_get_devstate(dev_id, &retval); + int result = eeepc_wmi_get_devstate_simple(dev_id); - if (ACPI_FAILURE(status)) - return -1; - - /* If the device is present, DSTS will always set some bits - * 0x00070000 - 1110000000000000000 - device supported - * 0x00060000 - 1100000000000000000 - not supported - * 0x00020000 - 0100000000000000000 - device supported - * 0x00010000 - 0010000000000000000 - not supported / special mode ? - */ - if (!retval || retval == 0x00060000) - return -ENODEV; + if (result < 0) + return result; if (dev_id == EEEPC_WMI_DEVID_WLAN && eeepc->hotplug_wireless) *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type, @@ -678,7 +660,7 @@ static int eeepc_new_rfkill(struct eeepc_wmi *eeepc, if (!*rfkill) return -EINVAL; - rfkill_init_sw_state(*rfkill, !(retval & 0x1)); + rfkill_init_sw_state(*rfkill, !result); result = rfkill_register(*rfkill); if (result) { rfkill_destroy(*rfkill); |