1 files changed, 219 insertions, 37 deletions

diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c
index 3780994dc8f2..b7f4d2705916 100644
--- a/drivers/platform/x86/dell-laptop.c
+++ b/drivers/platform/x86/dell-laptop.c
@@ -22,6 +22,8 @@
 #include <linux/rfkill.h>
 #include <linux/power_supply.h>
 #include <linux/acpi.h>
+#include <linux/mm.h>
+#include <linux/i8042.h>
 #include "../../firmware/dcdbas.h"
 
 #define BRIGHTNESS_TOKEN 0x7d
@@ -79,9 +81,73 @@ static const struct dmi_system_id __initdata dell_device_table[] = {
 			DMI_MATCH(DMI_CHASSIS_TYPE, "8"),
 		},
 	},
+	{
+		.ident = "Dell Computer Corporation",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
+			DMI_MATCH(DMI_CHASSIS_TYPE, "8"),
+		},
+	},
 	{ }
 };
 
+static struct dmi_system_id __devinitdata dell_blacklist[] = {
+	/* Supported by compal-laptop */
+	{
+		.ident = "Dell Mini 9",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 910"),
+		},
+	},
+	{
+		.ident = "Dell Mini 10",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1010"),
+		},
+	},
+	{
+		.ident = "Dell Mini 10v",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1011"),
+		},
+	},
+	{
+		.ident = "Dell Inspiron 11z",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1110"),
+		},
+	},
+	{
+		.ident = "Dell Mini 12",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1210"),
+		},
+	},
+	{}
+};
+
+static struct calling_interface_buffer *buffer;
+struct page *bufferpage;
+DEFINE_MUTEX(buffer_mutex);
+
+static int hwswitch_state;
+
+static void get_buffer(void)
+{
+	mutex_lock(&buffer_mutex);
+	memset(buffer, 0, sizeof(struct calling_interface_buffer));
+}
+
+static void release_buffer(void)
+{
+	mutex_unlock(&buffer_mutex);
+}
+
 static void __init parse_da_table(const struct dmi_header *dm)
 {
 	/* Final token is a terminator, so we don't want to copy it */
@@ -160,6 +226,8 @@ dell_send_request(struct calling_interface_buffer *buffer, int class,
 /* Derived from information in DellWirelessCtl.cpp:
    Class 17, select 11 is radio control. It returns an array of 32-bit values.
 
+   Input byte 0 = 0: Wireless information
+
    result[0]: return code
    result[1]:
      Bit 0:      Hardware switch supported
@@ -180,33 +248,62 @@ dell_send_request(struct calling_interface_buffer *buffer, int class,
      Bits 20-31: Reserved
    result[2]: NVRAM size in bytes
    result[3]: NVRAM format version number
+
+   Input byte 0 = 2: Wireless switch configuration
+   result[0]: return code
+   result[1]:
+     Bit 0:      Wifi controlled by switch
+     Bit 1:      Bluetooth controlled by switch
+     Bit 2:      WWAN controlled by switch
+     Bits 3-6:   Reserved
+     Bit 7:      Wireless switch config locked
+     Bit 8:      Wifi locator enabled
+     Bits 9-14:  Reserved
+     Bit 15:     Wifi locator setting locked
+     Bits 16-31: Reserved
 */
 
 static int dell_rfkill_set(void *data, bool blocked)
 {
-	struct calling_interface_buffer buffer;
 	int disable = blocked ? 1 : 0;
 	unsigned long radio = (unsigned long)data;
+	int hwswitch_bit = (unsigned long)data - 1;
+	int ret = 0;
+
+	get_buffer();
+	dell_send_request(buffer, 17, 11);
+
+	/* If the hardware switch controls this radio, and the hardware
+	   switch is disabled, don't allow changing the software state */
+	if ((hwswitch_state & BIT(hwswitch_bit)) &&
+	    !(buffer->output[1] & BIT(16))) {
+		ret = -EINVAL;
+		goto out;
+	}
 
-	memset(&buffer, 0, sizeof(struct calling_interface_buffer));
-	buffer.input[0] = (1 | (radio<<8) | (disable << 16));
-	dell_send_request(&buffer, 17, 11);
+	buffer->input[0] = (1 | (radio<<8) | (disable << 16));
+	dell_send_request(buffer, 17, 11);
 
-	return 0;
+out:
+	release_buffer();
+	return ret;
 }
 
 static void dell_rfkill_query(struct rfkill *rfkill, void *data)
 {
-	struct calling_interface_buffer buffer;
 	int status;
 	int bit = (unsigned long)data + 16;
+	int hwswitch_bit = (unsigned long)data - 1;
 
-	memset(&buffer, 0, sizeof(struct calling_interface_buffer));
-	dell_send_request(&buffer, 17, 11);
-	status = buffer.output[1];
+	get_buffer();
+	dell_send_request(buffer, 17, 11);
+	status = buffer->output[1];
+	release_buffer();
 
 	rfkill_set_sw_state(rfkill, !!(status & BIT(bit)));
-	rfkill_set_hw_state(rfkill, !(status & BIT(16)));
+
+	if (hwswitch_state & (BIT(hwswitch_bit)))
+		rfkill_set_hw_state(rfkill, !(status & BIT(16)));
 }
 
 static const struct rfkill_ops dell_rfkill_ops = {
@@ -214,15 +311,36 @@ static const struct rfkill_ops dell_rfkill_ops = {
 	.query = dell_rfkill_query,
 };
 
+static void dell_update_rfkill(struct work_struct *ignored)
+{
+	if (wifi_rfkill)
+		dell_rfkill_query(wifi_rfkill, (void *)1);
+	if (bluetooth_rfkill)
+		dell_rfkill_query(bluetooth_rfkill, (void *)2);
+	if (wwan_rfkill)
+		dell_rfkill_query(wwan_rfkill, (void *)3);
+}
+static DECLARE_DELAYED_WORK(dell_rfkill_work, dell_update_rfkill);
+
+
 static int __init dell_setup_rfkill(void)
 {
-	struct calling_interface_buffer buffer;
 	int status;
 	int ret;
 
-	memset(&buffer, 0, sizeof(struct calling_interface_buffer));
-	dell_send_request(&buffer, 17, 11);
-	status = buffer.output[1];
+	if (dmi_check_system(dell_blacklist)) {
+		printk(KERN_INFO "dell-laptop: Blacklisted hardware detected - "
+				"not enabling rfkill\n");
+		return 0;
+	}
+
+	get_buffer();
+	dell_send_request(buffer, 17, 11);
+	status = buffer->output[1];
+	buffer->input[0] = 0x2;
+	dell_send_request(buffer, 17, 11);
+	hwswitch_state = buffer->output[1];
+	release_buffer();
 
 	if ((status & (1<<2|1<<8)) == (1<<2|1<<8)) {
 		wifi_rfkill = rfkill_alloc("dell-wifi", &platform_device->dev,
@@ -298,39 +416,49 @@ static void dell_cleanup_rfkill(void)
 
 static int dell_send_intensity(struct backlight_device *bd)
 {
-	struct calling_interface_buffer buffer;
+	int ret = 0;
 
-	memset(&buffer, 0, sizeof(struct calling_interface_buffer));
-	buffer.input[0] = find_token_location(BRIGHTNESS_TOKEN);
-	buffer.input[1] = bd->props.brightness;
+	get_buffer();
+	buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
+	buffer->input[1] = bd->props.brightness;
 
-	if (buffer.input[0] == -1)
-		return -ENODEV;
+	if (buffer->input[0] == -1) {
+		ret = -ENODEV;
+		goto out;
+	}
 
 	if (power_supply_is_system_supplied() > 0)
-		dell_send_request(&buffer, 1, 2);
+		dell_send_request(buffer, 1, 2);
 	else
-		dell_send_request(&buffer, 1, 1);
+		dell_send_request(buffer, 1, 1);
 
+out:
+	release_buffer();
 	return 0;
 }
 
 static int dell_get_intensity(struct backlight_device *bd)
 {
-	struct calling_interface_buffer buffer;
+	int ret = 0;
 
-	memset(&buffer, 0, sizeof(struct calling_interface_buffer));
-	buffer.input[0] = find_token_location(BRIGHTNESS_TOKEN);
+	get_buffer();
+	buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
 
-	if (buffer.input[0] == -1)
-		return -ENODEV;
+	if (buffer->input[0] == -1) {
+		ret = -ENODEV;
+		goto out;
+	}
 
 	if (power_supply_is_system_supplied() > 0)
-		dell_send_request(&buffer, 0, 2);
+		dell_send_request(buffer, 0, 2);
 	else
-		dell_send_request(&buffer, 0, 1);
+		dell_send_request(buffer, 0, 1);
 
-	return buffer.output[1];
+out:
+	release_buffer();
+	if (ret)
+		return ret;
+	return buffer->output[1];
 }
 
 static struct backlight_ops dell_ops = {
@@ -338,9 +466,32 @@ static struct backlight_ops dell_ops = {
 	.update_status  = dell_send_intensity,
 };
 
+bool dell_laptop_i8042_filter(unsigned char data, unsigned char str,
+			      struct serio *port)
+{
+	static bool extended;
+
+	if (str & 0x20)
+		return false;
+
+	if (unlikely(data == 0xe0)) {
+		extended = true;
+		return false;
+	} else if (unlikely(extended)) {
+		switch (data) {
+		case 0x8:
+			schedule_delayed_work(&dell_rfkill_work,
+					      round_jiffies_relative(HZ));
+			break;
+		}
+		extended = false;
+	}
+
+	return false;
+}
+
 static int __init dell_init(void)
 {
-	struct calling_interface_buffer buffer;
 	int max_intensity = 0;
 	int ret;
 
@@ -366,6 +517,17 @@ static int __init dell_init(void)
 	if (ret)
 		goto fail_platform_device2;
 
+	/*
+	 * Allocate buffer below 4GB for SMI data--only 32-bit physical addr
+	 * is passed to SMI handler.
+	 */
+	bufferpage = alloc_page(GFP_KERNEL | GFP_DMA32);
+
+	if (!bufferpage)
+		goto fail_buffer;
+	buffer = page_address(bufferpage);
+	mutex_init(&buffer_mutex);
+
 	ret = dell_setup_rfkill();
 
 	if (ret) {
@@ -373,6 +535,13 @@ static int __init dell_init(void)
 		goto fail_rfkill;
 	}
 
+	ret = i8042_install_filter(dell_laptop_i8042_filter);
+	if (ret) {
+		printk(KERN_WARNING
+		       "dell-laptop: Unable to install key filter\n");
+		goto fail_filter;
+	}
+
 #ifdef CONFIG_ACPI
 	/* In the event of an ACPI backlight being available, don't
 	 * register the platform controller.
@@ -381,13 +550,13 @@ static int __init dell_init(void)
 		return 0;
 #endif
 
-	memset(&buffer, 0, sizeof(struct calling_interface_buffer));
-	buffer.input[0] = find_token_location(BRIGHTNESS_TOKEN);
-
-	if (buffer.input[0] != -1) {
-		dell_send_request(&buffer, 0, 2);
-		max_intensity = buffer.output[3];
+	get_buffer();
+	buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
+	if (buffer->input[0] != -1) {
+		dell_send_request(buffer, 0, 2);
+		max_intensity = buffer->output[3];
 	}
+	release_buffer();
 
 	if (max_intensity) {
 		dell_backlight_device = backlight_device_register(
@@ -410,8 +579,12 @@ static int __init dell_init(void)
 	return 0;
 
 fail_backlight:
+	i8042_remove_filter(dell_laptop_i8042_filter);
+fail_filter:
 	dell_cleanup_rfkill();
 fail_rfkill:
+	free_page((unsigned long)bufferpage);
+fail_buffer:
 	platform_device_del(platform_device);
 fail_platform_device2:
 	platform_device_put(platform_device);
@@ -424,8 +597,16 @@ fail_platform_driver:
 
 static void __exit dell_exit(void)
 {
+	cancel_delayed_work_sync(&dell_rfkill_work);
+	i8042_remove_filter(dell_laptop_i8042_filter);
 	backlight_device_unregister(dell_backlight_device);
 	dell_cleanup_rfkill();
+	if (platform_device) {
+		platform_device_del(platform_device);
+		platform_driver_unregister(&platform_driver);
+	}
+	kfree(da_tokens);
+	free_page((unsigned long)buffer);
 }
 
 module_init(dell_init);
@@ -435,3 +616,4 @@ MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
 MODULE_DESCRIPTION("Dell laptop driver");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("dmi:*svnDellInc.:*:ct8:*");
+MODULE_ALIAS("dmi:*svnDellComputerCorporation.:*:ct8:*");