Input: wistron - add support for Acer Aspire 1500 notebooks

Also fix a potential issue with some notebooks:

The current code assumes the response to bios_wifi_get_default_setting is
either 1 (disabled) or 3 (enabled), or wifi isn't supported.  The BIOS
response appears to be a bit field w/ 0x1 indicating hardware presence, 0x2
indicating actiation status, and the other 6 bits being unknown/reserved --
with the patch, these 6 bits are ignored.

Signed-off-by: Bernhard Rosenkraenzer <bero@arklinux.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 59 insertions, 20 deletions

diff --git a/drivers/input/misc/wistron_btns.c b/drivers/input/misc/wistron_btns.c
index 76d32e365b5d..6d7e865f9007 100644
--- a/drivers/input/misc/wistron_btns.c
+++ b/drivers/input/misc/wistron_btns.c
@@ -1,6 +1,7 @@
 /*
  * Wistron laptop button driver
  * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
+ * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
  *
  * You can redistribute and/or modify this program under the terms of the
  * GNU General Public License version 2 as published by the Free Software
@@ -40,6 +41,10 @@
 #error "POLL_FREQUENCY too high"
 #endif
 
+/* BIOS subsystem IDs */
+#define WIFI            0x35
+#define BLUETOOTH       0x34
+
 MODULE_AUTHOR("Miloslav Trmac <mitr@volny.cz>");
 MODULE_DESCRIPTION("Wistron laptop button driver");
 MODULE_LICENSE("GPL v2");
@@ -197,29 +202,29 @@ static u8 __init bios_get_cmos_address(void)
         return regs.ecx;
 }
 
-static u16 __init bios_wifi_get_default_setting(void)
+static u16 __init bios_get_default_setting(u8 subsys)
 {
         struct regs regs;
 
         memset(&regs, 0, sizeof (regs));
         regs.eax = 0x9610;
-        regs.ebx = 0x0235;
+        regs.ebx = 0x0200 | subsys;
         call_bios(&regs);
 
         return regs.eax;
 }
 
-static void bios_wifi_set_state(int enable)
+static void bios_set_state(u8 subsys, int enable)
 {
         struct regs regs;
 
         memset(&regs, 0, sizeof (regs));
         regs.eax = 0x9610;
-        regs.ebx = enable ? 0x0135 : 0x0035;
+        regs.ebx = (enable ? 0x0100 : 0x0000) | subsys;
         call_bios(&regs);
 }
 
- /* Hardware database */
+/* Hardware database */
 
 struct key_entry {
         char type;              /* See KE_* below */
@@ -227,10 +232,11 @@ struct key_entry {
         unsigned keycode;       /* For KE_KEY */
 };
 
-enum { KE_END, KE_KEY, KE_WIFI };
+enum { KE_END, KE_KEY, KE_WIFI, KE_BLUETOOTH };
 
 static const struct key_entry *keymap; /* = NULL; Current key map */
 static int have_wifi;
+static int have_bluetooth;
 
 static int __init dmi_matched(struct dmi_system_id *dmi)
 {
@@ -241,6 +247,9 @@ static int __init dmi_matched(struct dmi_system_id *dmi)
                 if (key->type == KE_WIFI) {
                         have_wifi = 1;
                         break;
+                } else if (key->type == KE_BLUETOOTH) {
+                        have_bluetooth = 1;
+                        break;
                 }
         }
         return 1;
@@ -273,6 +282,16 @@ static struct key_entry keymap_wistron_ms2141[] = {
         { KE_END,  0 }
 };
 
+static struct key_entry keymap_acer_aspire_1500[] = {
+        { KE_KEY, 0x11, KEY_PROG1 },
+        { KE_KEY, 0x12, KEY_PROG2 },
+        { KE_WIFI, 0x30, 0 },
+        { KE_KEY, 0x31, KEY_MAIL },
+        { KE_KEY, 0x36, KEY_WWW },
+        { KE_BLUETOOTH, 0x44, 0 },
+        { KE_END, 0 }
+};
+
 /*
  * If your machine is not here (which is currently rather likely), please send
  * a list of buttons and their key codes (reported when loading this module
@@ -288,6 +307,15 @@ static struct dmi_system_id dmi_ids[] = {
                 },
                 .driver_data = keymap_fs_amilo_pro_v2000
         },
+        {
+                .callback = dmi_matched,
+                .ident = "Acer Aspire 1500",
+                .matches = {
+                        DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+                        DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 1500"),
+                },
+                .driver_data = keymap_acer_aspire_1500
+        },
         { 0, }
 };
 
@@ -344,6 +372,7 @@ static void report_key(unsigned keycode)
  /* Driver core */
 
 static int wifi_enabled;
+static int bluetooth_enabled;
 
 static void poll_bios(unsigned long);
 
@@ -363,7 +392,14 @@ static void handle_key(u8 code)
                         case KE_WIFI:
                                 if (have_wifi) {
                                         wifi_enabled = !wifi_enabled;
-                                        bios_wifi_set_state(wifi_enabled);
+                                        bios_set_state(WIFI, wifi_enabled);
+                                }
+                                break;
+
+                        case KE_BLUETOOTH:
+                                if (have_bluetooth) {
+                                        bluetooth_enabled = !bluetooth_enabled;
+                                        bios_set_state(BLUETOOTH, bluetooth_enabled);
                                 }
                                 break;
 
@@ -407,21 +443,24 @@ static int __init wb_module_init(void)
         bios_attach();
         cmos_address = bios_get_cmos_address();
         if (have_wifi) {
-                switch (bios_wifi_get_default_setting()) {
-                case 0x01:
-                        wifi_enabled = 0;
-                        break;
-
-                case 0x03:
-                        wifi_enabled = 1;
-                        break;
-
-                default:
+                u16 wifi = bios_get_default_setting(WIFI);
+                if (wifi & 1)
+                        wifi_enabled = (wifi & 2) ? 1 : 0;
+                else
                         have_wifi = 0;
-                        break;
-                }
+
                 if (have_wifi)
-                        bios_wifi_set_state(wifi_enabled);
+                        bios_set_state(WIFI, wifi_enabled);
+        }
+        if (have_bluetooth) {
+                u16 bt = bios_get_default_setting(BLUETOOTH);
+                if (bt & 1)
+                        bluetooth_enabled = (bt & 2) ? 1 : 0;
+                else
+                        have_bluetooth = 0;
+
+                if (have_bluetooth)
+                        bios_set_state(BLUETOOTH, bluetooth_enabled);
         }
 
         setup_input_dev();