| /* |
| * Driver for Dell laptop extras |
| * |
| * Copyright (c) Red Hat <mjg@redhat.com> |
| * Copyright (c) 2014 Gabriele Mazzotta <gabriele.mzt@gmail.com> |
| * Copyright (c) 2014 Pali Rohár <pali.rohar@gmail.com> |
| * |
| * Based on documentation in the libsmbios package: |
| * Copyright (C) 2005-2014 Dell Inc. |
| * |
| * 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/module.h> |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/platform_device.h> |
| #include <linux/backlight.h> |
| #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> |
| #include <linux/i8042.h> |
| #include <linux/slab.h> |
| #include <linux/debugfs.h> |
| #include <linux/seq_file.h> |
| #include <acpi/video.h> |
| #include "../../firmware/dcdbas.h" |
| #include "dell-rbtn.h" |
| |
| #define BRIGHTNESS_TOKEN 0x7d |
| #define KBD_LED_OFF_TOKEN 0x01E1 |
| #define KBD_LED_ON_TOKEN 0x01E2 |
| #define KBD_LED_AUTO_TOKEN 0x01E3 |
| #define KBD_LED_AUTO_25_TOKEN 0x02EA |
| #define KBD_LED_AUTO_50_TOKEN 0x02EB |
| #define KBD_LED_AUTO_75_TOKEN 0x02EC |
| #define KBD_LED_AUTO_100_TOKEN 0x02F6 |
| |
| /* This structure will be modified by the firmware when we enter |
| * system management mode, hence the volatiles */ |
| |
| struct calling_interface_buffer { |
| u16 class; |
| u16 select; |
| volatile u32 input[4]; |
| volatile u32 output[4]; |
| } __packed; |
| |
| struct calling_interface_token { |
| u16 tokenID; |
| u16 location; |
| union { |
| u16 value; |
| u16 stringlength; |
| }; |
| }; |
| |
| struct calling_interface_structure { |
| struct dmi_header header; |
| u16 cmdIOAddress; |
| u8 cmdIOCode; |
| u32 supportedCmds; |
| struct calling_interface_token tokens[]; |
| } __packed; |
| |
| struct quirk_entry { |
| u8 touchpad_led; |
| |
| int needs_kbd_timeouts; |
| /* |
| * Ordered list of timeouts expressed in seconds. |
| * The list must end with -1 |
| */ |
| int kbd_timeouts[]; |
| }; |
| |
| static struct quirk_entry *quirks; |
| |
| static struct quirk_entry quirk_dell_vostro_v130 = { |
| .touchpad_led = 1, |
| }; |
| |
| static int __init dmi_matched(const struct dmi_system_id *dmi) |
| { |
| quirks = dmi->driver_data; |
| return 1; |
| } |
| |
| /* |
| * These values come from Windows utility provided by Dell. If any other value |
| * is used then BIOS silently set timeout to 0 without any error message. |
| */ |
| static struct quirk_entry quirk_dell_xps13_9333 = { |
| .needs_kbd_timeouts = 1, |
| .kbd_timeouts = { 0, 5, 15, 60, 5 * 60, 15 * 60, -1 }, |
| }; |
| |
| static int da_command_address; |
| static int da_command_code; |
| static int da_num_tokens; |
| static struct calling_interface_token *da_tokens; |
| |
| static struct platform_driver platform_driver = { |
| .driver = { |
| .name = "dell-laptop", |
| } |
| }; |
| |
| 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 bool force_rfkill; |
| |
| module_param(force_rfkill, bool, 0444); |
| MODULE_PARM_DESC(force_rfkill, "enable rfkill on non whitelisted models"); |
| |
| static const struct dmi_system_id dell_device_table[] __initconst = { |
| { |
| .ident = "Dell laptop", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| DMI_MATCH(DMI_CHASSIS_TYPE, "8"), |
| }, |
| }, |
| { |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| DMI_MATCH(DMI_CHASSIS_TYPE, "9"), /*Laptop*/ |
| }, |
| }, |
| { |
| .ident = "Dell Computer Corporation", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), |
| DMI_MATCH(DMI_CHASSIS_TYPE, "8"), |
| }, |
| }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(dmi, dell_device_table); |
| |
| static const struct dmi_system_id dell_quirks[] __initconst = { |
| { |
| .callback = dmi_matched, |
| .ident = "Dell Vostro V130", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V130"), |
| }, |
| .driver_data = &quirk_dell_vostro_v130, |
| }, |
| { |
| .callback = dmi_matched, |
| .ident = "Dell Vostro V131", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"), |
| }, |
| .driver_data = &quirk_dell_vostro_v130, |
| }, |
| { |
| .callback = dmi_matched, |
| .ident = "Dell Vostro 3350", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3350"), |
| }, |
| .driver_data = &quirk_dell_vostro_v130, |
| }, |
| { |
| .callback = dmi_matched, |
| .ident = "Dell Vostro 3555", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3555"), |
| }, |
| .driver_data = &quirk_dell_vostro_v130, |
| }, |
| { |
| .callback = dmi_matched, |
| .ident = "Dell Inspiron N311z", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron N311z"), |
| }, |
| .driver_data = &quirk_dell_vostro_v130, |
| }, |
| { |
| .callback = dmi_matched, |
| .ident = "Dell Inspiron M5110", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron M5110"), |
| }, |
| .driver_data = &quirk_dell_vostro_v130, |
| }, |
| { |
| .callback = dmi_matched, |
| .ident = "Dell Vostro 3360", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3360"), |
| }, |
| .driver_data = &quirk_dell_vostro_v130, |
| }, |
| { |
| .callback = dmi_matched, |
| .ident = "Dell Vostro 3460", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3460"), |
| }, |
| .driver_data = &quirk_dell_vostro_v130, |
| }, |
| { |
| .callback = dmi_matched, |
| .ident = "Dell Vostro 3560", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3560"), |
| }, |
| .driver_data = &quirk_dell_vostro_v130, |
| }, |
| { |
| .callback = dmi_matched, |
| .ident = "Dell Vostro 3450", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Dell System Vostro 3450"), |
| }, |
| .driver_data = &quirk_dell_vostro_v130, |
| }, |
| { |
| .callback = dmi_matched, |
| .ident = "Dell Inspiron 5420", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5420"), |
| }, |
| .driver_data = &quirk_dell_vostro_v130, |
| }, |
| { |
| .callback = dmi_matched, |
| .ident = "Dell Inspiron 5520", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5520"), |
| }, |
| .driver_data = &quirk_dell_vostro_v130, |
| }, |
| { |
| .callback = dmi_matched, |
| .ident = "Dell Inspiron 5720", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5720"), |
| }, |
| .driver_data = &quirk_dell_vostro_v130, |
| }, |
| { |
| .callback = dmi_matched, |
| .ident = "Dell Inspiron 7420", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7420"), |
| }, |
| .driver_data = &quirk_dell_vostro_v130, |
| }, |
| { |
| .callback = dmi_matched, |
| .ident = "Dell Inspiron 7520", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7520"), |
| }, |
| .driver_data = &quirk_dell_vostro_v130, |
| }, |
| { |
| .callback = dmi_matched, |
| .ident = "Dell Inspiron 7720", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7720"), |
| }, |
| .driver_data = &quirk_dell_vostro_v130, |
| }, |
| { |
| .callback = dmi_matched, |
| .ident = "Dell XPS13 9333", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| DMI_MATCH(DMI_PRODUCT_NAME, "XPS13 9333"), |
| }, |
| .driver_data = &quirk_dell_xps13_9333, |
| }, |
| { } |
| }; |
| |
| static struct calling_interface_buffer *buffer; |
| static 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 */ |
| int tokens = (dm->length-11)/sizeof(struct calling_interface_token)-1; |
| struct calling_interface_token *new_da_tokens; |
| struct calling_interface_structure *table = |
| container_of(dm, struct calling_interface_structure, header); |
| |
| /* 4 bytes of table header, plus 7 bytes of Dell header, plus at least |
| 6 bytes of entry */ |
| |
| if (dm->length < 17) |
| return; |
| |
| da_command_address = table->cmdIOAddress; |
| da_command_code = table->cmdIOCode; |
| |
| new_da_tokens = krealloc(da_tokens, (da_num_tokens + tokens) * |
| sizeof(struct calling_interface_token), |
| GFP_KERNEL); |
| |
| if (!new_da_tokens) |
| return; |
| da_tokens = new_da_tokens; |
| |
| memcpy(da_tokens+da_num_tokens, table->tokens, |
| sizeof(struct calling_interface_token) * tokens); |
| |
| da_num_tokens += tokens; |
| } |
| |
| static void __init find_tokens(const struct dmi_header *dm, void *dummy) |
| { |
| switch (dm->type) { |
| case 0xd4: /* Indexed IO */ |
| case 0xd5: /* Protected Area Type 1 */ |
| case 0xd6: /* Protected Area Type 2 */ |
| break; |
| case 0xda: /* Calling interface */ |
| parse_da_table(dm); |
| break; |
| } |
| } |
| |
| static int find_token_id(int tokenid) |
| { |
| int i; |
| |
| for (i = 0; i < da_num_tokens; i++) { |
| if (da_tokens[i].tokenID == tokenid) |
| return i; |
| } |
| |
| return -1; |
| } |
| |
| static int find_token_location(int tokenid) |
| { |
| int id; |
| |
| id = find_token_id(tokenid); |
| if (id == -1) |
| return -1; |
| |
| return da_tokens[id].location; |
| } |
| |
| static struct calling_interface_buffer * |
| dell_send_request(struct calling_interface_buffer *buffer, int class, |
| int select) |
| { |
| struct smi_cmd command; |
| |
| command.magic = SMI_CMD_MAGIC; |
| command.command_address = da_command_address; |
| command.command_code = da_command_code; |
| command.ebx = virt_to_phys(buffer); |
| command.ecx = 0x42534931; |
| |
| buffer->class = class; |
| buffer->select = select; |
| |
| dcdbas_smi_request(&command); |
| |
| return buffer; |
| } |
| |
| static inline int dell_smi_error(int value) |
| { |
| switch (value) { |
| case 0: /* Completed successfully */ |
| return 0; |
| case -1: /* Completed with error */ |
| return -EIO; |
| case -2: /* Function not supported */ |
| return -ENXIO; |
| default: /* Unknown error */ |
| return -EINVAL; |
| } |
| } |
| |
| /* |
| * Derived from information in smbios-wireless-ctl: |
| * |
| * cbSelect 17, Value 11 |
| * |
| * Return Wireless Info |
| * cbArg1, byte0 = 0x00 |
| * |
| * cbRes1 Standard return codes (0, -1, -2) |
| * cbRes2 Info bit flags: |
| * |
| * 0 Hardware switch supported (1) |
| * 1 WiFi locator supported (1) |
| * 2 WLAN supported (1) |
| * 3 Bluetooth (BT) supported (1) |
| * 4 WWAN supported (1) |
| * 5 Wireless KBD supported (1) |
| * 6 Uw b supported (1) |
| * 7 WiGig supported (1) |
| * 8 WLAN installed (1) |
| * 9 BT installed (1) |
| * 10 WWAN installed (1) |
| * 11 Uw b installed (1) |
| * 12 WiGig installed (1) |
| * 13-15 Reserved (0) |
| * 16 Hardware (HW) switch is On (1) |
| * 17 WLAN disabled (1) |
| * 18 BT disabled (1) |
| * 19 WWAN disabled (1) |
| * 20 Uw b disabled (1) |
| * 21 WiGig disabled (1) |
| * 20-31 Reserved (0) |
| * |
| * cbRes3 NVRAM size in bytes |
| * cbRes4, byte 0 NVRAM format version number |
| * |
| * |
| * Set QuickSet Radio Disable Flag |
| * cbArg1, byte0 = 0x01 |
| * cbArg1, byte1 |
| * Radio ID value: |
| * 0 Radio Status |
| * 1 WLAN ID |
| * 2 BT ID |
| * 3 WWAN ID |
| * 4 UWB ID |
| * 5 WIGIG ID |
| * cbArg1, byte2 Flag bits: |
| * 0 QuickSet disables radio (1) |
| * 1-7 Reserved (0) |
| * |
| * cbRes1 Standard return codes (0, -1, -2) |
| * cbRes2 QuickSet (QS) radio disable bit map: |
| * 0 QS disables WLAN |
| * 1 QS disables BT |
| * 2 QS disables WWAN |
| * 3 QS disables UWB |
| * 4 QS disables WIGIG |
| * 5-31 Reserved (0) |
| * |
| * Wireless Switch Configuration |
| * cbArg1, byte0 = 0x02 |
| * |
| * cbArg1, byte1 |
| * Subcommand: |
| * 0 Get config |
| * 1 Set config |
| * 2 Set WiFi locator enable/disable |
| * cbArg1,byte2 |
| * Switch settings (if byte 1==1): |
| * 0 WLAN sw itch control (1) |
| * 1 BT sw itch control (1) |
| * 2 WWAN sw itch control (1) |
| * 3 UWB sw itch control (1) |
| * 4 WiGig sw itch control (1) |
| * 5-7 Reserved (0) |
| * cbArg1, byte2 Enable bits (if byte 1==2): |
| * 0 Enable WiFi locator (1) |
| * |
| * cbRes1 Standard return codes (0, -1, -2) |
| * cbRes2 QuickSet radio disable bit map: |
| * 0 WLAN controlled by sw itch (1) |
| * 1 BT controlled by sw itch (1) |
| * 2 WWAN controlled by sw itch (1) |
| * 3 UWB controlled by sw itch (1) |
| * 4 WiGig controlled by sw itch (1) |
| * 5-6 Reserved (0) |
| * 7 Wireless sw itch config locked (1) |
| * 8 WiFi locator enabled (1) |
| * 9-14 Reserved (0) |
| * 15 WiFi locator setting locked (1) |
| * 16-31 Reserved (0) |
| * |
| * Read Local Config Data (LCD) |
| * cbArg1, byte0 = 0x10 |
| * cbArg1, byte1 NVRAM index low byte |
| * cbArg1, byte2 NVRAM index high byte |
| * cbRes1 Standard return codes (0, -1, -2) |
| * cbRes2 4 bytes read from LCD[index] |
| * cbRes3 4 bytes read from LCD[index+4] |
| * cbRes4 4 bytes read from LCD[index+8] |
| * |
| * Write Local Config Data (LCD) |
| * cbArg1, byte0 = 0x11 |
| * cbArg1, byte1 NVRAM index low byte |
| * cbArg1, byte2 NVRAM index high byte |
| * cbArg2 4 bytes to w rite at LCD[index] |
| * cbArg3 4 bytes to w rite at LCD[index+4] |
| * cbArg4 4 bytes to w rite at LCD[index+8] |
| * cbRes1 Standard return codes (0, -1, -2) |
| * |
| * Populate Local Config Data from NVRAM |
| * cbArg1, byte0 = 0x12 |
| * cbRes1 Standard return codes (0, -1, -2) |
| * |
| * Commit Local Config Data to NVRAM |
| * cbArg1, byte0 = 0x13 |
| * cbRes1 Standard return codes (0, -1, -2) |
| */ |
| |
| 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; |
| |
| get_buffer(); |
| dell_send_request(buffer, 17, 11); |
| |
| /* If the hardware switch controls this radio, and the hardware |
| switch is disabled, always disable the radio */ |
| if ((hwswitch_state & BIT(hwswitch_bit)) && |
| !(buffer->output[1] & BIT(16))) |
| disable = 1; |
| |
| buffer->input[0] = (1 | (radio<<8) | (disable << 16)); |
| dell_send_request(buffer, 17, 11); |
| |
| release_buffer(); |
| return 0; |
| } |
| |
| /* Must be called with the buffer held */ |
| static void dell_rfkill_update_sw_state(struct rfkill *rfkill, int radio, |
| int status) |
| { |
| if (status & BIT(0)) { |
| /* Has hw-switch, sync sw_state to BIOS */ |
| int block = rfkill_blocked(rfkill); |
| buffer->input[0] = (1 | (radio << 8) | (block << 16)); |
| dell_send_request(buffer, 17, 11); |
| } else { |
| /* No hw-switch, sync BIOS state to sw_state */ |
| rfkill_set_sw_state(rfkill, !!(status & BIT(radio + 16))); |
| } |
| } |
| |
| static void dell_rfkill_update_hw_state(struct rfkill *rfkill, int radio, |
| int status) |
| { |
| if (hwswitch_state & (BIT(radio - 1))) |
| rfkill_set_hw_state(rfkill, !(status & BIT(16))); |
| } |
| |
| static void dell_rfkill_query(struct rfkill *rfkill, void *data) |
| { |
| int status; |
| |
| get_buffer(); |
| dell_send_request(buffer, 17, 11); |
| status = buffer->output[1]; |
| |
| dell_rfkill_update_hw_state(rfkill, (unsigned long)data, status); |
| |
| release_buffer(); |
| } |
| |
| 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) |
| { |
| int status; |
| |
| get_buffer(); |
| dell_send_request(buffer, 17, 11); |
| status = buffer->output[1]; |
| release_buffer(); |
| |
| seq_printf(s, "status:\t0x%X\n", status); |
| seq_printf(s, "Bit 0 : Hardware switch supported: %lu\n", |
| status & BIT(0)); |
| seq_printf(s, "Bit 1 : Wifi locator supported: %lu\n", |
| (status & BIT(1)) >> 1); |
| seq_printf(s, "Bit 2 : Wifi is supported: %lu\n", |
| (status & BIT(2)) >> 2); |
| seq_printf(s, "Bit 3 : Bluetooth is supported: %lu\n", |
| (status & BIT(3)) >> 3); |
| seq_printf(s, "Bit 4 : WWAN is supported: %lu\n", |
| (status & BIT(4)) >> 4); |
| seq_printf(s, "Bit 5 : Wireless keyboard supported: %lu\n", |
| (status & BIT(5)) >> 5); |
| seq_printf(s, "Bit 6 : UWB supported: %lu\n", |
| (status & BIT(6)) >> 6); |
| seq_printf(s, "Bit 7 : WiGig supported: %lu\n", |
| (status & BIT(7)) >> 7); |
| seq_printf(s, "Bit 8 : Wifi is installed: %lu\n", |
| (status & BIT(8)) >> 8); |
| seq_printf(s, "Bit 9 : Bluetooth is installed: %lu\n", |
| (status & BIT(9)) >> 9); |
| seq_printf(s, "Bit 10: WWAN is installed: %lu\n", |
| (status & BIT(10)) >> 10); |
| seq_printf(s, "Bit 11: UWB installed: %lu\n", |
| (status & BIT(11)) >> 11); |
| seq_printf(s, "Bit 12: WiGig installed: %lu\n", |
| (status & BIT(12)) >> 12); |
| |
| seq_printf(s, "Bit 16: Hardware switch is on: %lu\n", |
| (status & BIT(16)) >> 16); |
| seq_printf(s, "Bit 17: Wifi is blocked: %lu\n", |
| (status & BIT(17)) >> 17); |
| seq_printf(s, "Bit 18: Bluetooth is blocked: %lu\n", |
| (status & BIT(18)) >> 18); |
| seq_printf(s, "Bit 19: WWAN is blocked: %lu\n", |
| (status & BIT(19)) >> 19); |
| seq_printf(s, "Bit 20: UWB is blocked: %lu\n", |
| (status & BIT(20)) >> 20); |
| seq_printf(s, "Bit 21: WiGig is blocked: %lu\n", |
| (status & BIT(21)) >> 21); |
| |
| seq_printf(s, "\nhwswitch_state:\t0x%X\n", hwswitch_state); |
| seq_printf(s, "Bit 0 : Wifi controlled by switch: %lu\n", |
| hwswitch_state & BIT(0)); |
| seq_printf(s, "Bit 1 : Bluetooth controlled by switch: %lu\n", |
| (hwswitch_state & BIT(1)) >> 1); |
| seq_printf(s, "Bit 2 : WWAN controlled by switch: %lu\n", |
| (hwswitch_state & BIT(2)) >> 2); |
| seq_printf(s, "Bit 3 : UWB controlled by switch: %lu\n", |
| (hwswitch_state & BIT(3)) >> 3); |
| seq_printf(s, "Bit 4 : WiGig controlled by switch: %lu\n", |
| (hwswitch_state & BIT(4)) >> 4); |
| seq_printf(s, "Bit 7 : Wireless switch config locked: %lu\n", |
| (hwswitch_state & BIT(7)) >> 7); |
| seq_printf(s, "Bit 8 : Wifi locator enabled: %lu\n", |
| (hwswitch_state & BIT(8)) >> 8); |
| seq_printf(s, "Bit 15: Wifi locator setting locked: %lu\n", |
| (hwswitch_state & BIT(15)) >> 15); |
| |
| return 0; |
| } |
| |
| static int dell_debugfs_open(struct inode *inode, struct file *file) |
| { |
| return single_open(file, dell_debugfs_show, inode->i_private); |
| } |
| |
| static const struct file_operations dell_debugfs_fops = { |
| .owner = THIS_MODULE, |
| .open = dell_debugfs_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = single_release, |
| }; |
| |
| static void dell_update_rfkill(struct work_struct *ignored) |
| { |
| int status; |
| |
| get_buffer(); |
| dell_send_request(buffer, 17, 11); |
| status = buffer->output[1]; |
| |
| if (wifi_rfkill) { |
| dell_rfkill_update_hw_state(wifi_rfkill, 1, status); |
| dell_rfkill_update_sw_state(wifi_rfkill, 1, status); |
| } |
| if (bluetooth_rfkill) { |
| dell_rfkill_update_hw_state(bluetooth_rfkill, 2, status); |
| dell_rfkill_update_sw_state(bluetooth_rfkill, 2, status); |
| } |
| if (wwan_rfkill) { |
| dell_rfkill_update_hw_state(wwan_rfkill, 3, status); |
| dell_rfkill_update_sw_state(wwan_rfkill, 3, status); |
| } |
| |
| release_buffer(); |
| } |
| static DECLARE_DELAYED_WORK(dell_rfkill_work, dell_update_rfkill); |
| |
| static bool dell_laptop_i8042_filter(unsigned char data, unsigned char str, |
| struct serio *port) |
| { |
| static bool extended; |
| |
| if (str & I8042_STR_AUXDATA) |
| 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 / 4)); |
| break; |
| } |
| extended = false; |
| } |
| |
| return false; |
| } |
| |
| static int (*dell_rbtn_notifier_register_func)(struct notifier_block *); |
| static int (*dell_rbtn_notifier_unregister_func)(struct notifier_block *); |
| |
| static int dell_laptop_rbtn_notifier_call(struct notifier_block *nb, |
| unsigned long action, void *data) |
| { |
| schedule_delayed_work(&dell_rfkill_work, 0); |
| return NOTIFY_OK; |
| } |
| |
| static struct notifier_block dell_laptop_rbtn_notifier = { |
| .notifier_call = dell_laptop_rbtn_notifier_call, |
| }; |
| |
| static int __init dell_setup_rfkill(void) |
| { |
| int status, ret, whitelisted; |
| const char *product; |
| |
| /* |
| * rfkill support causes trouble on various models, mostly Inspirons. |
| * So we whitelist certain series, and don't support rfkill on others. |
| */ |
| whitelisted = 0; |
| product = dmi_get_system_info(DMI_PRODUCT_NAME); |
| if (product && (strncmp(product, "Latitude", 8) == 0 || |
| strncmp(product, "Precision", 9) == 0)) |
| whitelisted = 1; |
| if (!force_rfkill && !whitelisted) |
| 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 & BIT(0))) { |
| if (force_rfkill) { |
| /* No hwsitch, clear all hw-controlled bits */ |
| hwswitch_state &= ~7; |
| } else { |
| /* rfkill is only tested on laptops with a hwswitch */ |
| return 0; |
| } |
| } |
| |
| 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; |
| } |
| |
| /* |
| * Dell Airplane Mode Switch driver (dell-rbtn) supports ACPI devices |
| * which can receive events from HW slider switch. |
| * |
| * Dell SMBIOS on whitelisted models supports controlling radio devices |
| * but does not support receiving HW button switch events. We can use |
| * i8042 filter hook function to receive keyboard data and handle |
| * keycode for HW button. |
| * |
| * So if it is possible we will use Dell Airplane Mode Switch ACPI |
| * driver for receiving HW events and Dell SMBIOS for setting rfkill |
| * states. If ACPI driver or device is not available we will fallback to |
| * i8042 filter hook function. |
| * |
| * To prevent duplicate rfkill devices which control and do same thing, |
| * dell-rbtn driver will automatically remove its own rfkill devices |
| * once function dell_rbtn_notifier_register() is called. |
| */ |
| |
| dell_rbtn_notifier_register_func = |
| symbol_request(dell_rbtn_notifier_register); |
| if (dell_rbtn_notifier_register_func) { |
| dell_rbtn_notifier_unregister_func = |
| symbol_request(dell_rbtn_notifier_unregister); |
| if (!dell_rbtn_notifier_unregister_func) { |
| symbol_put(dell_rbtn_notifier_register); |
| dell_rbtn_notifier_register_func = NULL; |
| } |
| } |
| |
| if (dell_rbtn_notifier_register_func) { |
| ret = dell_rbtn_notifier_register_func( |
| &dell_laptop_rbtn_notifier); |
| symbol_put(dell_rbtn_notifier_register); |
| dell_rbtn_notifier_register_func = NULL; |
| if (ret != 0) { |
| symbol_put(dell_rbtn_notifier_unregister); |
| dell_rbtn_notifier_unregister_func = NULL; |
| } |
| } else { |
| pr_info("Symbols from dell-rbtn acpi driver are not available\n"); |
| ret = -ENODEV; |
| } |
| |
| if (ret == 0) { |
| pr_info("Using dell-rbtn acpi driver for receiving events\n"); |
| } else if (ret != -ENODEV) { |
| pr_warn("Unable to register dell rbtn notifier\n"); |
| goto err_filter; |
| } else { |
| ret = i8042_install_filter(dell_laptop_i8042_filter); |
| if (ret) { |
| pr_warn("Unable to install key filter\n"); |
| goto err_filter; |
| } |
| pr_info("Using i8042 filter function for receiving events\n"); |
| } |
| |
| return 0; |
| err_filter: |
| if (wwan_rfkill) |
| rfkill_unregister(wwan_rfkill); |
| 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 (dell_rbtn_notifier_unregister_func) { |
| dell_rbtn_notifier_unregister_func(&dell_laptop_rbtn_notifier); |
| symbol_put(dell_rbtn_notifier_unregister); |
| dell_rbtn_notifier_unregister_func = NULL; |
| } else { |
| i8042_remove_filter(dell_laptop_i8042_filter); |
| } |
| cancel_delayed_work_sync(&dell_rfkill_work); |
| 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; |
| |
| get_buffer(); |
| buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN); |
| buffer->input[1] = bd->props.brightness; |
| |
| if (buffer->input[0] == -1) { |
| ret = -ENODEV; |
| goto out; |
| } |
| |
| if (power_supply_is_system_supplied() > 0) |
| dell_send_request(buffer, 1, 2); |
| else |
| dell_send_request(buffer, 1, 1); |
| |
| out: |
| release_buffer(); |
| return ret; |
| } |
| |
| static int dell_get_intensity(struct backlight_device *bd) |
| { |
| int ret = 0; |
| |
| get_buffer(); |
| buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN); |
| |
| if (buffer->input[0] == -1) { |
| ret = -ENODEV; |
| goto out; |
| } |
| |
| if (power_supply_is_system_supplied() > 0) |
| dell_send_request(buffer, 0, 2); |
| else |
| dell_send_request(buffer, 0, 1); |
| |
| ret = buffer->output[1]; |
| |
| out: |
| release_buffer(); |
| return ret; |
| } |
| |
| static const struct backlight_ops dell_ops = { |
| .get_brightness = dell_get_intensity, |
| .update_status = dell_send_intensity, |
| }; |
| |
| static void touchpad_led_on(void) |
| { |
| int command = 0x97; |
| char data = 1; |
| i8042_command(&data, command | 1 << 12); |
| } |
| |
| static void touchpad_led_off(void) |
| { |
| int command = 0x97; |
| char data = 2; |
| i8042_command(&data, command | 1 << 12); |
| } |
| |
| static void touchpad_led_set(struct led_classdev *led_cdev, |
| enum led_brightness value) |
| { |
| if (value > 0) |
| touchpad_led_on(); |
| else |
| touchpad_led_off(); |
| } |
| |
| static struct led_classdev touchpad_led = { |
| .name = "dell-laptop::touchpad", |
| .brightness_set = touchpad_led_set, |
| .flags = LED_CORE_SUSPENDRESUME, |
| }; |
| |
| static int __init touchpad_led_init(struct device *dev) |
| { |
| return led_classdev_register(dev, &touchpad_led); |
| } |
| |
| static void touchpad_led_exit(void) |
| { |
| led_classdev_unregister(&touchpad_led); |
| } |
| |
| /* |
| * Derived from information in smbios-keyboard-ctl: |
| * |
| * cbClass 4 |
| * cbSelect 11 |
| * Keyboard illumination |
| * cbArg1 determines the function to be performed |
| * |
| * cbArg1 0x0 = Get Feature Information |
| * cbRES1 Standard return codes (0, -1, -2) |
| * cbRES2, word0 Bitmap of user-selectable modes |
| * bit 0 Always off (All systems) |
| * bit 1 Always on (Travis ATG, Siberia) |
| * bit 2 Auto: ALS-based On; ALS-based Off (Travis ATG) |
| * bit 3 Auto: ALS- and input-activity-based On; input-activity based Off |
| * bit 4 Auto: Input-activity-based On; input-activity based Off |
| * bit 5 Auto: Input-activity-based On (illumination level 25%); input-activity based Off |
| * bit 6 Auto: Input-activity-based On (illumination level 50%); input-activity based Off |
| * bit 7 Auto: Input-activity-based On (illumination level 75%); input-activity based Off |
| * bit 8 Auto: Input-activity-based On (illumination level 100%); input-activity based Off |
| * bits 9-15 Reserved for future use |
| * cbRES2, byte2 Reserved for future use |
| * cbRES2, byte3 Keyboard illumination type |
| * 0 Reserved |
| * 1 Tasklight |
| * 2 Backlight |
| * 3-255 Reserved for future use |
| * cbRES3, byte0 Supported auto keyboard illumination trigger bitmap. |
| * bit 0 Any keystroke |
| * bit 1 Touchpad activity |
| * bit 2 Pointing stick |
| * bit 3 Any mouse |
| * bits 4-7 Reserved for future use |
| * cbRES3, byte1 Supported timeout unit bitmap |
| * bit 0 Seconds |
| * bit 1 Minutes |
| * bit 2 Hours |
| * bit 3 Days |
| * bits 4-7 Reserved for future use |
| * cbRES3, byte2 Number of keyboard light brightness levels |
| * cbRES4, byte0 Maximum acceptable seconds value (0 if seconds not supported). |
| * cbRES4, byte1 Maximum acceptable minutes value (0 if minutes not supported). |
| * cbRES4, byte2 Maximum acceptable hours value (0 if hours not supported). |
| * cbRES4, byte3 Maximum acceptable days value (0 if days not supported) |
| * |
| * cbArg1 0x1 = Get Current State |
| * cbRES1 Standard return codes (0, -1, -2) |
| * cbRES2, word0 Bitmap of current mode state |
| * bit 0 Always off (All systems) |
| * bit 1 Always on (Travis ATG, Siberia) |
| * bit 2 Auto: ALS-based On; ALS-based Off (Travis ATG) |
| * bit 3 Auto: ALS- and input-activity-based On; input-activity based Off |
| * bit 4 Auto: Input-activity-based On; input-activity based Off |
| * bit 5 Auto: Input-activity-based On (illumination level 25%); input-activity based Off |
| * bit 6 Auto: Input-activity-based On (illumination level 50%); input-activity based Off |
| * bit 7 Auto: Input-activity-based On (illumination level 75%); input-activity based Off |
| * bit 8 Auto: Input-activity-based On (illumination level 100%); input-activity based Off |
| * bits 9-15 Reserved for future use |
| * Note: Only One bit can be set |
| * cbRES2, byte2 Currently active auto keyboard illumination triggers. |
| * bit 0 Any keystroke |
| * bit 1 Touchpad activity |
| * bit 2 Pointing stick |
| * bit 3 Any mouse |
| * bits 4-7 Reserved for future use |
| * cbRES2, byte3 Current Timeout |
| * bits 7:6 Timeout units indicator: |
| * 00b Seconds |
| * 01b Minutes |
| * 10b Hours |
| * 11b Days |
| * bits 5:0 Timeout value (0-63) in sec/min/hr/day |
| * NOTE: A value of 0 means always on (no timeout) if any bits of RES3 byte |
| * are set upon return from the [Get feature information] call. |
| * cbRES3, byte0 Current setting of ALS value that turns the light on or off. |
| * cbRES3, byte1 Current ALS reading |
| * cbRES3, byte2 Current keyboard light level. |
| * |
| * cbArg1 0x2 = Set New State |
| * cbRES1 Standard return codes (0, -1, -2) |
| * cbArg2, word0 Bitmap of current mode state |
| * bit 0 Always off (All systems) |
| * bit 1 Always on (Travis ATG, Siberia) |
| * bit 2 Auto: ALS-based On; ALS-based Off (Travis ATG) |
| * bit 3 Auto: ALS- and input-activity-based On; input-activity based Off |
| * bit 4 Auto: Input-activity-based On; input-activity based Off |
| * bit 5 Auto: Input-activity-based On (illumination level 25%); input-activity based Off |
| * bit 6 Auto: Input-activity-based On (illumination level 50%); input-activity based Off |
| * bit 7 Auto: Input-activity-based On (illumination level 75%); input-activity based Off |
| * bit 8 Auto: Input-activity-based On (illumination level 100%); input-activity based Off |
| * bits 9-15 Reserved for future use |
| * Note: Only One bit can be set |
| * cbArg2, byte2 Desired auto keyboard illumination triggers. Must remain inactive to allow |
| * keyboard to turn off automatically. |
| * bit 0 Any keystroke |
| * bit 1 Touchpad activity |
| * bit 2 Pointing stick |
| * bit 3 Any mouse |
| * bits 4-7 Reserved for future use |
| * cbArg2, byte3 Desired Timeout |
| * bits 7:6 Timeout units indicator: |
| * 00b Seconds |
| * 01b Minutes |
| * 10b Hours |
| * 11b Days |
| * bits 5:0 Timeout value (0-63) in sec/min/hr/day |
| * cbArg3, byte0 Desired setting of ALS value that turns the light on or off. |
| * cbArg3, byte2 Desired keyboard light level. |
| */ |
| |
| |
| enum kbd_timeout_unit { |
| KBD_TIMEOUT_SECONDS = 0, |
| KBD_TIMEOUT_MINUTES, |
| KBD_TIMEOUT_HOURS, |
| KBD_TIMEOUT_DAYS, |
| }; |
| |
| enum kbd_mode_bit { |
| KBD_MODE_BIT_OFF = 0, |
| KBD_MODE_BIT_ON, |
| KBD_MODE_BIT_ALS, |
| KBD_MODE_BIT_TRIGGER_ALS, |
| KBD_MODE_BIT_TRIGGER, |
| KBD_MODE_BIT_TRIGGER_25, |
| KBD_MODE_BIT_TRIGGER_50, |
| KBD_MODE_BIT_TRIGGER_75, |
| KBD_MODE_BIT_TRIGGER_100, |
| }; |
| |
| #define kbd_is_als_mode_bit(bit) \ |
| ((bit) == KBD_MODE_BIT_ALS || (bit) == KBD_MODE_BIT_TRIGGER_ALS) |
| #define kbd_is_trigger_mode_bit(bit) \ |
| ((bit) >= KBD_MODE_BIT_TRIGGER_ALS && (bit) <= KBD_MODE_BIT_TRIGGER_100) |
| #define kbd_is_level_mode_bit(bit) \ |
| ((bit) >= KBD_MODE_BIT_TRIGGER_25 && (bit) <= KBD_MODE_BIT_TRIGGER_100) |
| |
| struct kbd_info { |
| u16 modes; |
| u8 type; |
| u8 triggers; |
| u8 levels; |
| u8 seconds; |
| u8 minutes; |
| u8 hours; |
| u8 days; |
| }; |
| |
| struct kbd_state { |
| u8 mode_bit; |
| u8 triggers; |
| u8 timeout_value; |
| u8 timeout_unit; |
| u8 als_setting; |
| u8 als_value; |
| u8 level; |
| }; |
| |
| static const int kbd_tokens[] = { |
| KBD_LED_OFF_TOKEN, |
| KBD_LED_AUTO_25_TOKEN, |
| KBD_LED_AUTO_50_TOKEN, |
| KBD_LED_AUTO_75_TOKEN, |
| KBD_LED_AUTO_100_TOKEN, |
| KBD_LED_ON_TOKEN, |
| }; |
| |
| static u16 kbd_token_bits; |
| |
| static struct kbd_info kbd_info; |
| static bool kbd_als_supported; |
| static bool kbd_triggers_supported; |
| |
| static u8 kbd_mode_levels[16]; |
| static int kbd_mode_levels_count; |
| |
| static u8 kbd_previous_level; |
| static u8 kbd_previous_mode_bit; |
| |
| static bool kbd_led_present; |
| |
| /* |
| * NOTE: there are three ways to set the keyboard backlight level. |
| * First, via kbd_state.mode_bit (assigning KBD_MODE_BIT_TRIGGER_* value). |
| * Second, via kbd_state.level (assigning numerical value <= kbd_info.levels). |
| * Third, via SMBIOS tokens (KBD_LED_* in kbd_tokens) |
| * |
| * There are laptops which support only one of these methods. If we want to |
| * support as many machines as possible we need to implement all three methods. |
| * The first two methods use the kbd_state structure. The third uses SMBIOS |
| * tokens. If kbd_info.levels == 0, the machine does not support setting the |
| * keyboard backlight level via kbd_state.level. |
| */ |
| |
| static int kbd_get_info(struct kbd_info *info) |
| { |
| u8 units; |
| int ret; |
| |
| get_buffer(); |
| |
| buffer->input[0] = 0x0; |
| dell_send_request(buffer, 4, 11); |
| ret = buffer->output[0]; |
| |
| if (ret) { |
| ret = dell_smi_error(ret); |
| goto out; |
| } |
| |
| info->modes = buffer->output[1] & 0xFFFF; |
| info->type = (buffer->output[1] >> 24) & 0xFF; |
| info->triggers = buffer->output[2] & 0xFF; |
| units = (buffer->output[2] >> 8) & 0xFF; |
| info->levels = (buffer->output[2] >> 16) & 0xFF; |
| |
| if (units & BIT(0)) |
| info->seconds = (buffer->output[3] >> 0) & 0xFF; |
| if (units & BIT(1)) |
| info->minutes = (buffer->output[3] >> 8) & 0xFF; |
| if (units & BIT(2)) |
| info->hours = (buffer->output[3] >> 16) & 0xFF; |
| if (units & BIT(3)) |
| info->days = (buffer->output[3] >> 24) & 0xFF; |
| |
| out: |
| release_buffer(); |
| return ret; |
| } |
| |
| static unsigned int kbd_get_max_level(void) |
| { |
| if (kbd_info.levels != 0) |
| return kbd_info.levels; |
| if (kbd_mode_levels_count > 0) |
| return kbd_mode_levels_count - 1; |
| return 0; |
| } |
| |
| static int kbd_get_level(struct kbd_state *state) |
| { |
| int i; |
| |
| if (kbd_info.levels != 0) |
| return state->level; |
| |
| if (kbd_mode_levels_count > 0) { |
| for (i = 0; i < kbd_mode_levels_count; ++i) |
| if (kbd_mode_levels[i] == state->mode_bit) |
| return i; |
| return 0; |
| } |
| |
| return -EINVAL; |
| } |
| |
| static int kbd_set_level(struct kbd_state *state, u8 level) |
| { |
| if (kbd_info.levels != 0) { |
| if (level != 0) |
| kbd_previous_level = level; |
| if (state->level == level) |
| return 0; |
| state->level = level; |
| if (level != 0 && state->mode_bit == KBD_MODE_BIT_OFF) |
| state->mode_bit = kbd_previous_mode_bit; |
| else if (level == 0 && state->mode_bit != KBD_MODE_BIT_OFF) { |
| kbd_previous_mode_bit = state->mode_bit; |
| state->mode_bit = KBD_MODE_BIT_OFF; |
| } |
| return 0; |
| } |
| |
| if (kbd_mode_levels_count > 0 && level < kbd_mode_levels_count) { |
| if (level != 0) |
| kbd_previous_level = level; |
| state->mode_bit = kbd_mode_levels[level]; |
| return 0; |
| } |
| |
| return -EINVAL; |
| } |
| |
| static int kbd_get_state(struct kbd_state *state) |
| { |
| int ret; |
| |
| get_buffer(); |
| |
| buffer->input[0] = 0x1; |
| dell_send_request(buffer, 4, 11); |
| ret = buffer->output[0]; |
| |
| if (ret) { |
| ret = dell_smi_error(ret); |
| goto out; |
| } |
| |
| state->mode_bit = ffs(buffer->output[1] & 0xFFFF); |
| if (state->mode_bit != 0) |
| state->mode_bit--; |
| |
| state->triggers = (buffer->output[1] >> 16) & 0xFF; |
| state->timeout_value = (buffer->output[1] >> 24) & 0x3F; |
| state->timeout_unit = (buffer->output[1] >> 30) & 0x3; |
| state->als_setting = buffer->output[2] & 0xFF; |
| state->als_value = (buffer->output[2] >> 8) & 0xFF; |
| state->level = (buffer->output[2] >> 16) & 0xFF; |
| |
| out: |
| release_buffer(); |
| return ret; |
| } |
| |
| static int kbd_set_state(struct kbd_state *state) |
| { |
| int ret; |
| |
| get_buffer(); |
| buffer->input[0] = 0x2; |
| buffer->input[1] = BIT(state->mode_bit) & 0xFFFF; |
| buffer->input[1] |= (state->triggers & 0xFF) << 16; |
| buffer->input[1] |= (state->timeout_value & 0x3F) << 24; |
| buffer->input[1] |= (state->timeout_unit & 0x3) << 30; |
| buffer->input[2] = state->als_setting & 0xFF; |
| buffer->input[2] |= (state->level & 0xFF) << 16; |
| dell_send_request(buffer, 4, 11); |
| ret = buffer->output[0]; |
| release_buffer(); |
| |
| return dell_smi_error(ret); |
| } |
| |
| static int kbd_set_state_safe(struct kbd_state *state, struct kbd_state *old) |
| { |
| int ret; |
| |
| ret = kbd_set_state(state); |
| if (ret == 0) |
| return 0; |
| |
| /* |
| * When setting the new state fails,try to restore the previous one. |
| * This is needed on some machines where BIOS sets a default state when |
| * setting a new state fails. This default state could be all off. |
| */ |
| |
| if (kbd_set_state(old)) |
| pr_err("Setting old previous keyboard state failed\n"); |
| |
| return ret; |
| } |
| |
| static int kbd_set_token_bit(u8 bit) |
| { |
| int id; |
| int ret; |
| |
| if (bit >= ARRAY_SIZE(kbd_tokens)) |
| return -EINVAL; |
| |
| id = find_token_id(kbd_tokens[bit]); |
| if (id == -1) |
| return -EINVAL; |
| |
| get_buffer(); |
| buffer->input[0] = da_tokens[id].location; |
| buffer->input[1] = da_tokens[id].value; |
| dell_send_request(buffer, 1, 0); |
| ret = buffer->output[0]; |
| release_buffer(); |
| |
| return dell_smi_error(ret); |
| } |
| |
| static int kbd_get_token_bit(u8 bit) |
| { |
| int id; |
| int ret; |
| int val; |
| |
| if (bit >= ARRAY_SIZE(kbd_tokens)) |
| return -EINVAL; |
| |
| id = find_token_id(kbd_tokens[bit]); |
| if (id == -1) |
| return -EINVAL; |
| |
| get_buffer(); |
| buffer->input[0] = da_tokens[id].location; |
| dell_send_request(buffer, 0, 0); |
| ret = buffer->output[0]; |
| val = buffer->output[1]; |
| release_buffer(); |
| |
| if (ret) |
| return dell_smi_error(ret); |
| |
| return (val == da_tokens[id].value); |
| } |
| |
| static int kbd_get_first_active_token_bit(void) |
| { |
| int i; |
| int ret; |
| |
| for (i = 0; i < ARRAY_SIZE(kbd_tokens); ++i) { |
| ret = kbd_get_token_bit(i); |
| if (ret == 1) |
| return i; |
| } |
| |
| return ret; |
| } |
| |
| static int kbd_get_valid_token_counts(void) |
| { |
| return hweight16(kbd_token_bits); |
| } |
| |
| static inline int kbd_init_info(void) |
| { |
| struct kbd_state state; |
| int ret; |
| int i; |
| |
| ret = kbd_get_info(&kbd_info); |
| if (ret) |
| return ret; |
| |
| kbd_get_state(&state); |
| |
| /* NOTE: timeout value is stored in 6 bits so max value is 63 */ |
| if (kbd_info.seconds > 63) |
| kbd_info.seconds = 63; |
| if (kbd_info.minutes > 63) |
| kbd_info.minutes = 63; |
| if (kbd_info.hours > 63) |
| kbd_info.hours = 63; |
| if (kbd_info.days > 63) |
| kbd_info.days = 63; |
| |
| /* NOTE: On tested machines ON mode did not work and caused |
| * problems (turned backlight off) so do not use it |
| */ |
| kbd_info.modes &= ~BIT(KBD_MODE_BIT_ON); |
| |
| kbd_previous_level = kbd_get_level(&state); |
| kbd_previous_mode_bit = state.mode_bit; |
| |
| if (kbd_previous_level == 0 && kbd_get_max_level() != 0) |
| kbd_previous_level = 1; |
| |
| if (kbd_previous_mode_bit == KBD_MODE_BIT_OFF) { |
| kbd_previous_mode_bit = |
| ffs(kbd_info.modes & ~BIT(KBD_MODE_BIT_OFF)); |
| if (kbd_previous_mode_bit != 0) |
| kbd_previous_mode_bit--; |
| } |
| |
| if (kbd_info.modes & (BIT(KBD_MODE_BIT_ALS) | |
| BIT(KBD_MODE_BIT_TRIGGER_ALS))) |
| kbd_als_supported = true; |
| |
| if (kbd_info.modes & ( |
| BIT(KBD_MODE_BIT_TRIGGER_ALS) | BIT(KBD_MODE_BIT_TRIGGER) | |
| BIT(KBD_MODE_BIT_TRIGGER_25) | BIT(KBD_MODE_BIT_TRIGGER_50) | |
| BIT(KBD_MODE_BIT_TRIGGER_75) | BIT(KBD_MODE_BIT_TRIGGER_100) |
| )) |
| kbd_triggers_supported = true; |
| |
| /* kbd_mode_levels[0] is reserved, see below */ |
| for (i = 0; i < 16; ++i) |
| if (kbd_is_level_mode_bit(i) && (BIT(i) & kbd_info.modes)) |
| kbd_mode_levels[1 + kbd_mode_levels_count++] = i; |
| |
| /* |
| * Find the first supported mode and assign to kbd_mode_levels[0]. |
| * This should be 0 (off), but we cannot depend on the BIOS to |
| * support 0. |
| */ |
| if (kbd_mode_levels_count > 0) { |
| for (i = 0; i < 16; ++i) { |
| if (BIT(i) & kbd_info.modes) { |
| kbd_mode_levels[0] = i; |
| break; |
| } |
| } |
| kbd_mode_levels_count++; |
| } |
| |
| return 0; |
| |
| } |
| |
| static inline void kbd_init_tokens(void) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(kbd_tokens); ++i) |
| if (find_token_id(kbd_tokens[i]) != -1) |
| kbd_token_bits |= BIT(i); |
| } |
| |
| static void kbd_init(void) |
| { |
| int ret; |
| |
| ret = kbd_init_info(); |
| kbd_init_tokens(); |
| |
| if (kbd_token_bits != 0 || ret == 0) |
| kbd_led_present = true; |
| } |
| |
| static ssize_t kbd_led_timeout_store(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct kbd_state new_state; |
| struct kbd_state state; |
| bool convert; |
| int value; |
| int ret; |
| char ch; |
| u8 unit; |
| int i; |
| |
| ret = sscanf(buf, "%d %c", &value, &ch); |
| if (ret < 1) |
| return -EINVAL; |
| else if (ret == 1) |
| ch = 's'; |
| |
| if (value < 0) |
| return -EINVAL; |
| |
| convert = false; |
| |
| switch (ch) { |
| case 's': |
| if (value > kbd_info.seconds) |
| convert = true; |
| unit = KBD_TIMEOUT_SECONDS; |
| break; |
| case 'm': |
| if (value > kbd_info.minutes) |
| convert = true; |
| unit = KBD_TIMEOUT_MINUTES; |
| break; |
| case 'h': |
| if (value > kbd_info.hours) |
| convert = true; |
| unit = KBD_TIMEOUT_HOURS; |
| break; |
| case 'd': |
| if (value > kbd_info.days) |
| convert = true; |
| unit = KBD_TIMEOUT_DAYS; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| if (quirks && quirks->needs_kbd_timeouts) |
| convert = true; |
| |
| if (convert) { |
| /* Convert value from current units to seconds */ |
| switch (unit) { |
| case KBD_TIMEOUT_DAYS: |
| value *= 24; |
| case KBD_TIMEOUT_HOURS: |
| value *= 60; |
| case KBD_TIMEOUT_MINUTES: |
| value *= 60; |
| unit = KBD_TIMEOUT_SECONDS; |
| } |
| |
| if (quirks && quirks->needs_kbd_timeouts) { |
| for (i = 0; quirks->kbd_timeouts[i] != -1; i++) { |
| if (value <= quirks->kbd_timeouts[i]) { |
| value = quirks->kbd_timeouts[i]; |
| break; |
| } |
| } |
| } |
| |
| if (value <= kbd_info.seconds && kbd_info.seconds) { |
| unit = KBD_TIMEOUT_SECONDS; |
| } else if (value / 60 <= kbd_info.minutes && kbd_info.minutes) { |
| value /= 60; |
| unit = KBD_TIMEOUT_MINUTES; |
| } else if (value / (60 * 60) <= kbd_info.hours && kbd_info.hours) { |
| value /= (60 * 60); |
| unit = KBD_TIMEOUT_HOURS; |
| } else if (value / (60 * 60 * 24) <= kbd_info.days && kbd_info.days) { |
| value /= (60 * 60 * 24); |
| unit = KBD_TIMEOUT_DAYS; |
| } else { |
| return -EINVAL; |
| } |
| } |
| |
| ret = kbd_get_state(&state); |
| if (ret) |
| return ret; |
| |
| new_state = state; |
| new_state.timeout_value = value; |
| new_state.timeout_unit = unit; |
| |
| ret = kbd_set_state_safe(&new_state, &state); |
| if (ret) |
| return ret; |
| |
| return count; |
| } |
| |
| static ssize_t kbd_led_timeout_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct kbd_state state; |
| int ret; |
| int len; |
| |
| ret = kbd_get_state(&state); |
| if (ret) |
| return ret; |
| |
| len = sprintf(buf, "%d", state.timeout_value); |
| |
| switch (state.timeout_unit) { |
| case KBD_TIMEOUT_SECONDS: |
| return len + sprintf(buf+len, "s\n"); |
| case KBD_TIMEOUT_MINUTES: |
| return len + sprintf(buf+len, "m\n"); |
| case KBD_TIMEOUT_HOURS: |
| return len + sprintf(buf+len, "h\n"); |
| case KBD_TIMEOUT_DAYS: |
| return len + sprintf(buf+len, "d\n"); |
| default: |
| return -EINVAL; |
| } |
| |
| return len; |
| } |
| |
| static DEVICE_ATTR(stop_timeout, S_IRUGO | S_IWUSR, |
| kbd_led_timeout_show, kbd_led_timeout_store); |
| |
| static const char * const kbd_led_triggers[] = { |
| "keyboard", |
| "touchpad", |
| /*"trackstick"*/ NULL, /* NOTE: trackstick is just alias for touchpad */ |
| "mouse", |
| }; |
| |
| static ssize_t kbd_led_triggers_store(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct kbd_state new_state; |
| struct kbd_state state; |
| bool triggers_enabled = false; |
| int trigger_bit = -1; |
| char trigger[21]; |
| int i, ret; |
| |
| ret = sscanf(buf, "%20s", trigger); |
| if (ret != 1) |
| return -EINVAL; |
| |
| if (trigger[0] != '+' && trigger[0] != '-') |
| return -EINVAL; |
| |
| ret = kbd_get_state(&state); |
| if (ret) |
| return ret; |
| |
| if (kbd_triggers_supported) |
| triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit); |
| |
| if (kbd_triggers_supported) { |
| for (i = 0; i < ARRAY_SIZE(kbd_led_triggers); ++i) { |
| if (!(kbd_info.triggers & BIT(i))) |
| continue; |
| if (!kbd_led_triggers[i]) |
| continue; |
| if (strcmp(trigger+1, kbd_led_triggers[i]) != 0) |
| continue; |
| if (trigger[0] == '+' && |
| triggers_enabled && (state.triggers & BIT(i))) |
| return count; |
| if (trigger[0] == '-' && |
| (!triggers_enabled || !(state.triggers & BIT(i)))) |
| return count; |
| trigger_bit = i; |
| break; |
| } |
| } |
| |
| if (trigger_bit != -1) { |
| new_state = state; |
| if (trigger[0] == '+') |
| new_state.triggers |= BIT(trigger_bit); |
| else { |
| new_state.triggers &= ~BIT(trigger_bit); |
| /* NOTE: trackstick bit (2) must be disabled when |
| * disabling touchpad bit (1), otherwise touchpad |
| * bit (1) will not be disabled */ |
| if (trigger_bit == 1) |
| new_state.triggers &= ~BIT(2); |
| } |
| if ((kbd_info.triggers & new_state.triggers) != |
| new_state.triggers) |
| return -EINVAL; |
| if (new_state.triggers && !triggers_enabled) { |
| new_state.mode_bit = KBD_MODE_BIT_TRIGGER; |
| kbd_set_level(&new_state, kbd_previous_level); |
| } else if (new_state.triggers == 0) { |
| kbd_set_level(&new_state, 0); |
| } |
| if (!(kbd_info.modes & BIT(new_state.mode_bit))) |
| return -EINVAL; |
| ret = kbd_set_state_safe(&new_state, &state); |
| if (ret) |
| return ret; |
| if (new_state.mode_bit != KBD_MODE_BIT_OFF) |
| kbd_previous_mode_bit = new_state.mode_bit; |
| return count; |
| } |
| |
| return -EINVAL; |
| } |
| |
| static ssize_t kbd_led_triggers_show(struct device *dev, |
| struct device_attribute *attr, char *buf) |
| { |
| struct kbd_state state; |
| bool triggers_enabled; |
| int level, i, ret; |
| int len = 0; |
| |
| ret = kbd_get_state(&state); |
| if (ret) |
| return ret; |
| |
| len = 0; |
| |
| if (kbd_triggers_supported) { |
| triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit); |
| level = kbd_get_level(&state); |
| for (i = 0; i < ARRAY_SIZE(kbd_led_triggers); ++i) { |
| if (!(kbd_info.triggers & BIT(i))) |
| continue; |
| if (!kbd_led_triggers[i]) |
| continue; |
| if ((triggers_enabled || level <= 0) && |
| (state.triggers & BIT(i))) |
| buf[len++] = '+'; |
| else |
| buf[len++] = '-'; |
| len += sprintf(buf+len, "%s ", kbd_led_triggers[i]); |
| } |
| } |
| |
| if (len) |
| buf[len - 1] = '\n'; |
| |
| return len; |
| } |
| |
| static DEVICE_ATTR(start_triggers, S_IRUGO | S_IWUSR, |
| kbd_led_triggers_show, kbd_led_triggers_store); |
| |
| static ssize_t kbd_led_als_enabled_store(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct kbd_state new_state; |
| struct kbd_state state; |
| bool triggers_enabled = false; |
| int enable; |
| int ret; |
| |
| ret = kstrtoint(buf, 0, &enable); |
| if (ret) |
| return ret; |
| |
| ret = kbd_get_state(&state); |
| if (ret) |
| return ret; |
| |
| if (enable == kbd_is_als_mode_bit(state.mode_bit)) |
| return count; |
| |
| new_state = state; |
| |
| if (kbd_triggers_supported) |
| triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit); |
| |
| if (enable) { |
| if (triggers_enabled) |
| new_state.mode_bit = KBD_MODE_BIT_TRIGGER_ALS; |
| else |
| new_state.mode_bit = KBD_MODE_BIT_ALS; |
| } else { |
| if (triggers_enabled) { |
| new_state.mode_bit = KBD_MODE_BIT_TRIGGER; |
| kbd_set_level(&new_state, kbd_previous_level); |
| } else { |
| new_state.mode_bit = KBD_MODE_BIT_ON; |
| } |
| } |
| if (!(kbd_info.modes & BIT(new_state.mode_bit))) |
| return -EINVAL; |
| |
| ret = kbd_set_state_safe(&new_state, &state); |
| if (ret) |
| return ret; |
| kbd_previous_mode_bit = new_state.mode_bit; |
| |
| return count; |
| } |
| |
| static ssize_t kbd_led_als_enabled_show(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct kbd_state state; |
| bool enabled = false; |
| int ret; |
| |
| ret = kbd_get_state(&state); |
| if (ret) |
| return ret; |
| enabled = kbd_is_als_mode_bit(state.mode_bit); |
| |
| return sprintf(buf, "%d\n", enabled ? 1 : 0); |
| } |
| |
| static DEVICE_ATTR(als_enabled, S_IRUGO | S_IWUSR, |
| kbd_led_als_enabled_show, kbd_led_als_enabled_store); |
| |
| static ssize_t kbd_led_als_setting_store(struct device *dev, |
| struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct kbd_state state; |
| struct kbd_state new_state; |
| u8 setting; |
| int ret; |
| |
| ret = kstrtou8(buf, 10, &setting); |
| if (ret) |
| return ret; |
| |
| ret = kbd_get_state(&state); |
| if (ret) |
| return ret; |
| |
| new_state = state; |
| new_state.als_setting = setting; |
| |
| ret = kbd_set_state_safe(&new_state, &state); |
| if (ret) |
| return ret; |
| |
| return count; |
| } |
| |
| static ssize_t kbd_led_als_setting_show(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| struct kbd_state state; |
| int ret; |
| |
| ret = kbd_get_state(&state); |
| if (ret) |
| return ret; |
| |
| return sprintf(buf, "%d\n", state.als_setting); |
| } |
| |
| static DEVICE_ATTR(als_setting, S_IRUGO | S_IWUSR, |
| kbd_led_als_setting_show, kbd_led_als_setting_store); |
| |
| static struct attribute *kbd_led_attrs[] = { |
| &dev_attr_stop_timeout.attr, |
| &dev_attr_start_triggers.attr, |
| NULL, |
| }; |
| |
| static const struct attribute_group kbd_led_group = { |
| .attrs = kbd_led_attrs, |
| }; |
| |
| static struct attribute *kbd_led_als_attrs[] = { |
| &dev_attr_als_enabled.attr, |
| &dev_attr_als_setting.attr, |
| NULL, |
| }; |
| |
| static const struct attribute_group kbd_led_als_group = { |
| .attrs = kbd_led_als_attrs, |
| }; |
| |
| static const struct attribute_group *kbd_led_groups[] = { |
| &kbd_led_group, |
| &kbd_led_als_group, |
| NULL, |
| }; |
| |
| static enum led_brightness kbd_led_level_get(struct led_classdev *led_cdev) |
| { |
| int ret; |
| u16 num; |
| struct kbd_state state; |
| |
| if (kbd_get_max_level()) { |
| ret = kbd_get_state(&state); |
| if (ret) |
| return 0; |
| ret = kbd_get_level(&state); |
| if (ret < 0) |
| return 0; |
| return ret; |
| } |
| |
| if (kbd_get_valid_token_counts()) { |
| ret = kbd_get_first_active_token_bit(); |
| if (ret < 0) |
| return 0; |
| for (num = kbd_token_bits; num != 0 && ret > 0; --ret) |
| num &= num - 1; /* clear the first bit set */ |
| if (num == 0) |
| return 0; |
| return ffs(num) - 1; |
| } |
| |
| pr_warn("Keyboard brightness level control not supported\n"); |
| return 0; |
| } |
| |
| static void kbd_led_level_set(struct led_classdev *led_cdev, |
| enum led_brightness value) |
| { |
| struct kbd_state state; |
| struct kbd_state new_state; |
| u16 num; |
| |
| if (kbd_get_max_level()) { |
| if (kbd_get_state(&state)) |
| return; |
| new_state = state; |
| if (kbd_set_level(&new_state, value)) |
| return; |
| kbd_set_state_safe(&new_state, &state); |
| return; |
| } |
| |
| if (kbd_get_valid_token_counts()) { |
| for (num = kbd_token_bits; num != 0 && value > 0; --value) |
| num &= num - 1; /* clear the first bit set */ |
| if (num == 0) |
| return; |
| kbd_set_token_bit(ffs(num) - 1); |
| return; |
| } |
| |
| pr_warn("Keyboard brightness level control not supported\n"); |
| } |
| |
| static struct led_classdev kbd_led = { |
| .name = "dell::kbd_backlight", |
| .brightness_set = kbd_led_level_set, |
| .brightness_get = kbd_led_level_get, |
| .groups = kbd_led_groups, |
| }; |
| |
| static int __init kbd_led_init(struct device *dev) |
| { |
| kbd_init(); |
| if (!kbd_led_present) |
| return -ENODEV; |
| if (!kbd_als_supported) |
| kbd_led_groups[1] = NULL; |
| kbd_led.max_brightness = kbd_get_max_level(); |
| if (!kbd_led.max_brightness) { |
| kbd_led.max_brightness = kbd_get_valid_token_counts(); |
| if (kbd_led.max_brightness) |
| kbd_led.max_brightness--; |
| } |
| return led_classdev_register(dev, &kbd_led); |
| } |
| |
| static void brightness_set_exit(struct led_classdev *led_cdev, |
| enum led_brightness value) |
| { |
| /* Don't change backlight level on exit */ |
| }; |
| |
| static void kbd_led_exit(void) |
| { |
| if (!kbd_led_present) |
| return; |
| kbd_led.brightness_set = brightness_set_exit; |
| led_classdev_unregister(&kbd_led); |
| } |
| |
| static int __init dell_init(void) |
| { |
| int max_intensity = 0; |
| int ret; |
| |
| if (!dmi_check_system(dell_device_table)) |
| return -ENODEV; |
| |
| quirks = NULL; |
| /* find if this machine support other functions */ |
| dmi_check_system(dell_quirks); |
| |
| dmi_walk(find_tokens, NULL); |
| |
| if (!da_tokens) { |
| pr_info("Unable to find dmi tokens\n"); |
| return -ENODEV; |
| } |
| |
| ret = platform_driver_register(&platform_driver); |
| if (ret) |
| goto fail_platform_driver; |
| platform_device = platform_device_alloc("dell-laptop", -1); |
| if (!platform_device) { |
| ret = -ENOMEM; |
| goto fail_platform_device1; |
| } |
| ret = platform_device_add(platform_device); |
| if (ret) |
| goto fail_platform_device2; |
| |
| /* |
| * Allocate buffer below 4GB for SMI data--only 32-bit physical addr |
| * is passed to SMI handler. |
| */ |
| buffer = (void *)__get_free_page(GFP_KERNEL | GFP_DMA32); |
| if (!buffer) { |
| ret = -ENOMEM; |
| goto fail_buffer; |
| } |
| |
| ret = dell_setup_rfkill(); |
| |
| if (ret) { |
| pr_warn("Unable to setup rfkill\n"); |
| goto fail_rfkill; |
| } |
| |
| if (quirks && quirks->touchpad_led) |
| touchpad_led_init(&platform_device->dev); |
| |
| kbd_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); |
| |
| if (acpi_video_get_backlight_type() != acpi_backlight_vendor) |
| return 0; |
| |
| 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) { |
| struct backlight_properties props; |
| memset(&props, 0, sizeof(struct backlight_properties)); |
| props.type = BACKLIGHT_PLATFORM; |
| props.max_brightness = max_intensity; |
| dell_backlight_device = backlight_device_register("dell_backlight", |
| &platform_device->dev, |
| NULL, |
| &dell_ops, |
| &props); |
| |
| if (IS_ERR(dell_backlight_device)) { |
| ret = PTR_ERR(dell_backlight_device); |
| dell_backlight_device = NULL; |
| goto fail_backlight; |
| } |
| |
| dell_backlight_device->props.brightness = |
| dell_get_intensity(dell_backlight_device); |
| backlight_update_status(dell_backlight_device); |
| } |
| |
| return 0; |
| |
| fail_backlight: |
| dell_cleanup_rfkill(); |
| fail_rfkill: |
| free_page((unsigned long)buffer); |
| fail_buffer: |
| platform_device_del(platform_device); |
| fail_platform_device2: |
| platform_device_put(platform_device); |
| fail_platform_device1: |
| platform_driver_unregister(&platform_driver); |
| fail_platform_driver: |
| kfree(da_tokens); |
| return ret; |
| } |
| |
| static void __exit dell_exit(void) |
| { |
| debugfs_remove_recursive(dell_laptop_dir); |
| if (quirks && quirks->touchpad_led) |
| touchpad_led_exit(); |
| kbd_led_exit(); |
| backlight_device_unregister(dell_backlight_device); |
| dell_cleanup_rfkill(); |
| if (platform_device) { |
| platform_device_unregister(platform_device); |
| platform_driver_unregister(&platform_driver); |
| } |
| kfree(da_tokens); |
| free_page((unsigned long)buffer); |
| } |
| |
| /* dell-rbtn.c driver export functions which will not work correctly (and could |
| * cause kernel crash) if they are called before dell-rbtn.c init code. This is |
| * not problem when dell-rbtn.c is compiled as external module. When both files |
| * (dell-rbtn.c and dell-laptop.c) are compiled statically into kernel, then we |
| * need to ensure that dell_init() will be called after initializing dell-rbtn. |
| * This can be achieved by late_initcall() instead module_init(). |
| */ |
| late_initcall(dell_init); |
| module_exit(dell_exit); |
| |
| MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>"); |
| MODULE_AUTHOR("Gabriele Mazzotta <gabriele.mzt@gmail.com>"); |
| MODULE_AUTHOR("Pali Rohár <pali.rohar@gmail.com>"); |
| MODULE_DESCRIPTION("Dell laptop driver"); |
| MODULE_LICENSE("GPL"); |