diff options
author | Matthew Garrett <mjg@redhat.com> | 2009-01-20 16:17:48 +0100 |
---|---|---|
committer | Len Brown <len.brown@intel.com> | 2009-01-20 14:36:53 -0500 |
commit | 5740294ca3a9b113fe146f2826effb69ca50008d (patch) | |
tree | 00e571fce1111310ef4e12801a657aeaf80ae77f /drivers | |
parent | c9ddf8fede1271bde0a512fa94f77c4cb1ef4040 (diff) |
eeepc-laptop: Implement rfkill hotplugging in eeepc-laptop
The Eee implements rfkill by logically unplugging the wireless card from the
PCI bus. Despite sending ACPI notifications, this does not appear to be
implemented using standard ACPI hotplug - nor does the firmware provide the
_OSC method required to support native PCIe hotplug. The only sensible choice
appears to be to handle the hotplugging directly in the eeepc-laptop driver.
Tested successfully on a 700, 900 and 901.
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/platform/x86/eeepc-laptop.c | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/drivers/platform/x86/eeepc-laptop.c b/drivers/platform/x86/eeepc-laptop.c index 21e5206ed28..66655d2b4ce 100644 --- a/drivers/platform/x86/eeepc-laptop.c +++ b/drivers/platform/x86/eeepc-laptop.c @@ -30,6 +30,7 @@ #include <linux/uaccess.h> #include <linux/input.h> #include <linux/rfkill.h> +#include <linux/pci.h> #define EEEPC_LAPTOP_VERSION "0.1" @@ -517,6 +518,41 @@ static void notify_brn(void) bd->props.brightness = read_brightness(bd); } +static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data) +{ + struct pci_dev *dev; + struct pci_bus *bus = pci_find_bus(0, 1); + + if (event != ACPI_NOTIFY_BUS_CHECK) + return; + + if (!bus) { + printk(EEEPC_WARNING "Unable to find PCI bus 1?\n"); + return; + } + + if (get_acpi(CM_ASL_WLAN) == 1) { + dev = pci_get_slot(bus, 0); + if (dev) { + /* Device already present */ + pci_dev_put(dev); + return; + } + dev = pci_scan_single_device(bus, 0); + if (dev) { + pci_bus_assign_resources(bus); + if (pci_bus_add_device(dev)) + printk(EEEPC_ERR "Unable to hotplug wifi\n"); + } + } else { + dev = pci_get_slot(bus, 0); + if (dev) { + pci_remove_bus_device(dev); + pci_dev_put(dev); + } + } +} + static void eeepc_hotk_notify(acpi_handle handle, u32 event, void *data) { static struct key_entry *key; @@ -543,6 +579,45 @@ static void eeepc_hotk_notify(acpi_handle handle, u32 event, void *data) } } +static int eeepc_register_rfkill_notifier(char *node) +{ + acpi_status status = AE_OK; + acpi_handle handle; + + status = acpi_get_handle(NULL, node, &handle); + + if (ACPI_SUCCESS(status)) { + status = acpi_install_notify_handler(handle, + ACPI_SYSTEM_NOTIFY, + eeepc_rfkill_notify, + NULL); + if (ACPI_FAILURE(status)) + printk(EEEPC_WARNING + "Failed to register notify on %s\n", node); + } else + return -ENODEV; + + return 0; +} + +static void eeepc_unregister_rfkill_notifier(char *node) +{ + acpi_status status = AE_OK; + acpi_handle handle; + + status = acpi_get_handle(NULL, node, &handle); + + if (ACPI_SUCCESS(status)) { + status = acpi_remove_notify_handler(handle, + ACPI_SYSTEM_NOTIFY, + eeepc_rfkill_notify); + if (ACPI_FAILURE(status)) + printk(EEEPC_ERR + "Error removing rfkill notify handler %s\n", + node); + } +} + static int eeepc_hotk_add(struct acpi_device *device) { acpi_status status = AE_OK; @@ -622,6 +697,10 @@ static int eeepc_hotk_add(struct acpi_device *device) if (result) goto bluetooth_fail; } + + eeepc_register_rfkill_notifier("\\_SB.PCI0.P0P6"); + eeepc_register_rfkill_notifier("\\_SB.PCI0.P0P7"); + return 0; bluetooth_fail: @@ -649,6 +728,10 @@ static int eeepc_hotk_remove(struct acpi_device *device, int type) eeepc_hotk_notify); if (ACPI_FAILURE(status)) printk(EEEPC_ERR "Error removing notify handler\n"); + + eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P6"); + eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P7"); + kfree(ehotk); return 0; } |