diff options
| -rw-r--r-- | drivers/platform/x86/dell-laptop.c | 289 |
1 files changed, 289 insertions, 0 deletions
diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c index bb77e18b3dd4..55f75a2d5168 100644 --- a/drivers/platform/x86/dell-laptop.c +++ b/drivers/platform/x86/dell-laptop.c @@ -21,6 +21,7 @@ #include <linux/err.h> #include <linux/dmi.h> #include <linux/io.h> +#include <linux/rfkill.h> #include <linux/power_supply.h> #include <linux/acpi.h> #include <linux/mm.h> @@ -89,6 +90,9 @@ static struct platform_driver platform_driver = { static struct platform_device *platform_device; static struct backlight_device *dell_backlight_device; +static struct rfkill *wifi_rfkill; +static struct rfkill *bluetooth_rfkill; +static struct rfkill *wwan_rfkill; static const struct dmi_system_id dell_device_table[] __initconst = { { @@ -115,6 +119,53 @@ static const struct dmi_system_id dell_device_table[] __initconst = { }; MODULE_DEVICE_TABLE(dmi, dell_device_table); +static struct dmi_system_id 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 Mini 1012", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1012"), + }, + }, + { + .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 dmi_system_id dell_quirks[] = { { .callback = dmi_matched, @@ -355,6 +406,94 @@ dell_send_request(struct calling_interface_buffer *buffer, int class, return buffer; } +/* 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 + Bit 1: Wifi locator supported + Bit 2: Wifi is supported + Bit 3: Bluetooth is supported + Bit 4: WWAN is supported + Bit 5: Wireless keyboard supported + Bits 6-7: Reserved + Bit 8: Wifi is installed + Bit 9: Bluetooth is installed + Bit 10: WWAN is installed + Bits 11-15: Reserved + Bit 16: Hardware switch is on + Bit 17: Wifi is blocked + Bit 18: Bluetooth is blocked + Bit 19: WWAN is blocked + 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) +{ + 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; + } + + buffer->input[0] = (1 | (radio<<8) | (disable << 16)); + dell_send_request(buffer, 17, 11); + +out: + release_buffer(); + return ret; +} + +static void dell_rfkill_query(struct rfkill *rfkill, void *data) +{ + int status; + int bit = (unsigned long)data + 16; + int hwswitch_bit = (unsigned long)data - 1; + + get_buffer(); + dell_send_request(buffer, 17, 11); + status = buffer->output[1]; + release_buffer(); + + rfkill_set_sw_state(rfkill, !!(status & BIT(bit))); + + if (hwswitch_state & (BIT(hwswitch_bit))) + rfkill_set_hw_state(rfkill, !(status & BIT(16))); +} + +static const struct rfkill_ops dell_rfkill_ops = { + .set_block = dell_rfkill_set, + .query = dell_rfkill_query, +}; + static struct dentry *dell_laptop_dir; static int dell_debugfs_show(struct seq_file *s, void *data) @@ -424,6 +563,108 @@ static const struct file_operations dell_debugfs_fops = { .release = single_release, }; +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) +{ + int status; + int ret; + + if (dmi_check_system(dell_blacklist)) { + pr_info("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, + RFKILL_TYPE_WLAN, + &dell_rfkill_ops, (void *) 1); + if (!wifi_rfkill) { + ret = -ENOMEM; + goto err_wifi; + } + ret = rfkill_register(wifi_rfkill); + if (ret) + goto err_wifi; + } + + if ((status & (1<<3|1<<9)) == (1<<3|1<<9)) { + bluetooth_rfkill = rfkill_alloc("dell-bluetooth", + &platform_device->dev, + RFKILL_TYPE_BLUETOOTH, + &dell_rfkill_ops, (void *) 2); + if (!bluetooth_rfkill) { + ret = -ENOMEM; + goto err_bluetooth; + } + ret = rfkill_register(bluetooth_rfkill); + if (ret) + goto err_bluetooth; + } + + if ((status & (1<<4|1<<10)) == (1<<4|1<<10)) { + wwan_rfkill = rfkill_alloc("dell-wwan", + &platform_device->dev, + RFKILL_TYPE_WWAN, + &dell_rfkill_ops, (void *) 3); + if (!wwan_rfkill) { + ret = -ENOMEM; + goto err_wwan; + } + ret = rfkill_register(wwan_rfkill); + if (ret) + goto err_wwan; + } + + return 0; +err_wwan: + rfkill_destroy(wwan_rfkill); + if (bluetooth_rfkill) + rfkill_unregister(bluetooth_rfkill); +err_bluetooth: + rfkill_destroy(bluetooth_rfkill); + if (wifi_rfkill) + rfkill_unregister(wifi_rfkill); +err_wifi: + rfkill_destroy(wifi_rfkill); + + return ret; +} + +static void dell_cleanup_rfkill(void) +{ + if (wifi_rfkill) { + rfkill_unregister(wifi_rfkill); + rfkill_destroy(wifi_rfkill); + } + if (bluetooth_rfkill) { + rfkill_unregister(bluetooth_rfkill); + rfkill_destroy(bluetooth_rfkill); + } + if (wwan_rfkill) { + rfkill_unregister(wwan_rfkill); + rfkill_destroy(wwan_rfkill); + } +} + static int dell_send_intensity(struct backlight_device *bd) { int ret = 0; @@ -515,6 +756,30 @@ static void touchpad_led_exit(void) led_classdev_unregister(&touchpad_led); } +static 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) { int max_intensity = 0; @@ -557,10 +822,26 @@ static int __init dell_init(void) } buffer = page_address(bufferpage); + ret = dell_setup_rfkill(); + + if (ret) { + pr_warn("Unable to setup rfkill\n"); + goto fail_rfkill; + } + + ret = i8042_install_filter(dell_laptop_i8042_filter); + if (ret) { + pr_warn("Unable to install key filter\n"); + goto fail_filter; + } + if (quirks && quirks->touchpad_led) touchpad_led_init(&platform_device->dev); dell_laptop_dir = debugfs_create_dir("dell_laptop", NULL); + if (dell_laptop_dir != NULL) + debugfs_create_file("rfkill", 0444, dell_laptop_dir, NULL, + &dell_debugfs_fops); #ifdef CONFIG_ACPI /* In the event of an ACPI backlight being available, don't @@ -603,6 +884,11 @@ static int __init dell_init(void) return 0; fail_backlight: + i8042_remove_filter(dell_laptop_i8042_filter); + cancel_delayed_work_sync(&dell_rfkill_work); +fail_filter: + dell_cleanup_rfkill(); +fail_rfkill: free_page((unsigned long)bufferpage); fail_buffer: platform_device_del(platform_device); @@ -620,7 +906,10 @@ static void __exit dell_exit(void) debugfs_remove_recursive(dell_laptop_dir); if (quirks && quirks->touchpad_led) touchpad_led_exit(); + i8042_remove_filter(dell_laptop_i8042_filter); + cancel_delayed_work_sync(&dell_rfkill_work); backlight_device_unregister(dell_backlight_device); + dell_cleanup_rfkill(); if (platform_device) { platform_device_unregister(platform_device); platform_driver_unregister(&platform_driver); |