diff options
Diffstat (limited to 'drivers/platform/x86/dell-laptop.c')
| -rw-r--r-- | drivers/platform/x86/dell-laptop.c | 2003 |
1 files changed, 2003 insertions, 0 deletions
diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c new file mode 100644 index 000000000..2c1d5f543 --- /dev/null +++ b/drivers/platform/x86/dell-laptop.c @@ -0,0 +1,2003 @@ +/* + * 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 "../../firmware/dcdbas.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 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); +} + +/* + * 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); + +#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)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(); + 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_AUTHOR("Gabriele Mazzotta <gabriele.mzt@gmail.com>"); +MODULE_AUTHOR("Pali Rohár <pali.rohar@gmail.com>"); +MODULE_DESCRIPTION("Dell laptop driver"); +MODULE_LICENSE("GPL"); |