Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / platform / x86 / topstar-laptop.c

diff --git a/kernel/drivers/platform/x86/topstar-laptop.c b/kernel/drivers/platform/x86/topstar-laptop.c
new file mode 100644 (file)
index 0000000..e597de0
--- /dev/null
+++ b/kernel/drivers/platform/x86/topstar-laptop.c
@@ -0,0 +1,187 @@
+/*
+ * ACPI driver for Topstar notebooks (hotkeys support only)
+ *
+ * Copyright (c) 2009 Herton Ronaldo Krzesinski <herton@mandriva.com.br>
+ *
+ * Implementation inspired by existing x86 platform drivers, in special
+ * asus/eepc/fujitsu-laptop, thanks to their authors
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/acpi.h>
+#include <linux/input.h>
+#include <linux/input/sparse-keymap.h>
+
+#define ACPI_TOPSTAR_CLASS "topstar"
+
+struct topstar_hkey {
+       struct input_dev *inputdev;
+};
+
+static const struct key_entry topstar_keymap[] = {
+       { KE_KEY, 0x80, { KEY_BRIGHTNESSUP } },
+       { KE_KEY, 0x81, { KEY_BRIGHTNESSDOWN } },
+       { KE_KEY, 0x83, { KEY_VOLUMEUP } },
+       { KE_KEY, 0x84, { KEY_VOLUMEDOWN } },
+       { KE_KEY, 0x85, { KEY_MUTE } },
+       { KE_KEY, 0x86, { KEY_SWITCHVIDEOMODE } },
+       { KE_KEY, 0x87, { KEY_F13 } }, /* touchpad enable/disable key */
+       { KE_KEY, 0x88, { KEY_WLAN } },
+       { KE_KEY, 0x8a, { KEY_WWW } },
+       { KE_KEY, 0x8b, { KEY_MAIL } },
+       { KE_KEY, 0x8c, { KEY_MEDIA } },
+
+       /* Known non hotkey events don't handled or that we don't care yet */
+       { KE_IGNORE, 0x82, }, /* backlight event */
+       { KE_IGNORE, 0x8e, },
+       { KE_IGNORE, 0x8f, },
+       { KE_IGNORE, 0x90, },
+
+       /*
+        * 'G key' generate two event codes, convert to only
+        * one event/key code for now, consider replacing by
+        * a switch (3G switch - SW_3G?)
+        */
+       { KE_KEY, 0x96, { KEY_F14 } },
+       { KE_KEY, 0x97, { KEY_F14 } },
+
+       { KE_END, 0 }
+};
+
+static void acpi_topstar_notify(struct acpi_device *device, u32 event)
+{
+       static bool dup_evnt[2];
+       bool *dup;
+       struct topstar_hkey *hkey = acpi_driver_data(device);
+
+       /* 0x83 and 0x84 key events comes duplicated... */
+       if (event == 0x83 || event == 0x84) {
+               dup = &dup_evnt[event - 0x83];
+               if (*dup) {
+                       *dup = false;
+                       return;
+               }
+               *dup = true;
+       }
+
+       if (!sparse_keymap_report_event(hkey->inputdev, event, 1, true))
+               pr_info("unknown event = 0x%02x\n", event);
+}
+
+static int acpi_topstar_fncx_switch(struct acpi_device *device, bool state)
+{
+       acpi_status status;
+
+       status = acpi_execute_simple_method(device->handle, "FNCX",
+                                               state ? 0x86 : 0x87);
+       if (ACPI_FAILURE(status)) {
+               pr_err("Unable to switch FNCX notifications\n");
+               return -ENODEV;
+       }
+
+       return 0;
+}
+
+static int acpi_topstar_init_hkey(struct topstar_hkey *hkey)
+{
+       struct input_dev *input;
+       int error;
+
+       input = input_allocate_device();
+       if (!input)
+               return -ENOMEM;
+
+       input->name = "Topstar Laptop extra buttons";
+       input->phys = "topstar/input0";
+       input->id.bustype = BUS_HOST;
+
+       error = sparse_keymap_setup(input, topstar_keymap, NULL);
+       if (error) {
+               pr_err("Unable to setup input device keymap\n");
+               goto err_free_dev;
+       }
+
+       error = input_register_device(input);
+       if (error) {
+               pr_err("Unable to register input device\n");
+               goto err_free_keymap;
+       }
+
+       hkey->inputdev = input;
+       return 0;
+
+ err_free_keymap:
+       sparse_keymap_free(input);
+ err_free_dev:
+       input_free_device(input);
+       return error;
+}
+
+static int acpi_topstar_add(struct acpi_device *device)
+{
+       struct topstar_hkey *tps_hkey;
+
+       tps_hkey = kzalloc(sizeof(struct topstar_hkey), GFP_KERNEL);
+       if (!tps_hkey)
+               return -ENOMEM;
+
+       strcpy(acpi_device_name(device), "Topstar TPSACPI");
+       strcpy(acpi_device_class(device), ACPI_TOPSTAR_CLASS);
+
+       if (acpi_topstar_fncx_switch(device, true))
+               goto add_err;
+
+       if (acpi_topstar_init_hkey(tps_hkey))
+               goto add_err;
+
+       device->driver_data = tps_hkey;
+       return 0;
+
+add_err:
+       kfree(tps_hkey);
+       return -ENODEV;
+}
+
+static int acpi_topstar_remove(struct acpi_device *device)
+{
+       struct topstar_hkey *tps_hkey = acpi_driver_data(device);
+
+       acpi_topstar_fncx_switch(device, false);
+
+       sparse_keymap_free(tps_hkey->inputdev);
+       input_unregister_device(tps_hkey->inputdev);
+       kfree(tps_hkey);
+
+       return 0;
+}
+
+static const struct acpi_device_id topstar_device_ids[] = {
+       { "TPSACPI01", 0 },
+       { "", 0 },
+};
+MODULE_DEVICE_TABLE(acpi, topstar_device_ids);
+
+static struct acpi_driver acpi_topstar_driver = {
+       .name = "Topstar laptop ACPI driver",
+       .class = ACPI_TOPSTAR_CLASS,
+       .ids = topstar_device_ids,
+       .ops = {
+               .add = acpi_topstar_add,
+               .remove = acpi_topstar_remove,
+               .notify = acpi_topstar_notify,
+       },
+};
+module_acpi_driver(acpi_topstar_driver);
+
+MODULE_AUTHOR("Herton Ronaldo Krzesinski");
+MODULE_DESCRIPTION("Topstar Laptop ACPI Extras driver");
+MODULE_LICENSE("GPL");