| /* |
| * Driver for Dell laptop extras |
| * |
| * Copyright (c) Red Hat <mjg@redhat.com> |
| * |
| * Based on documentation in the libsmbios package, Copyright (C) 2005 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 "../../firmware/dcdbas.h" |
| |
| #define BRIGHTNESS_TOKEN 0x7d |
| |
| /* 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; |
| }; |
| |
| 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; |
| } |
| |
| 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, |
| }, |
| { } |
| }; |
| |
| static struct calling_interface_buffer *buffer; |
| static struct page *bufferpage; |
| 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_location(int tokenid) |
| { |
| int i; |
| for (i = 0; i < da_num_tokens; i++) { |
| if (da_tokens[i].tokenID == tokenid) |
| return da_tokens[i].location; |
| } |
| |
| return -1; |
| } |
| |
| 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; |
| } |
| |
| /* 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; |
| |
| 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 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 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, "\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 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 __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; |
| } |
| |
| ret = i8042_install_filter(dell_laptop_i8042_filter); |
| if (ret) { |
| pr_warn("Unable to install key filter\n"); |
| goto err_filter; |
| } |
| |
| 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 (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); |
| } |
| |
| 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. |
| */ |
| bufferpage = alloc_page(GFP_KERNEL | GFP_DMA32); |
| if (!bufferpage) { |
| ret = -ENOMEM; |
| goto fail_buffer; |
| } |
| buffer = page_address(bufferpage); |
| |
| 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); |
| |
| 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 |
| * register the platform controller. |
| */ |
| if (acpi_video_backlight_support()) |
| return 0; |
| #endif |
| |
| 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: |
| i8042_remove_filter(dell_laptop_i8042_filter); |
| cancel_delayed_work_sync(&dell_rfkill_work); |
| 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); |
| 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(); |
| 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); |
| } |
| kfree(da_tokens); |
| free_page((unsigned long)buffer); |
| } |
| |
| module_init(dell_init); |
| module_exit(dell_exit); |
| |
| MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>"); |
| MODULE_DESCRIPTION("Dell laptop driver"); |
| MODULE_LICENSE("GPL"); |