| /* |
| * 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. |
| */ |
| |
| #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 "../../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; |
| |
| 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", |
| .owner = THIS_MODULE, |
| } |
| }; |
| |
| static struct platform_device *platform_device; |
| static struct backlight_device *dell_backlight_device; |
| static struct rfkill *wifi_rfkill; |
| static struct rfkill *bluetooth_rfkill; |
| static struct rfkill *wwan_rfkill; |
| |
| static const struct dmi_system_id __initdata dell_device_table[] = { |
| { |
| .ident = "Dell laptop", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| DMI_MATCH(DMI_CHASSIS_TYPE, "8"), |
| }, |
| }, |
| { |
| .ident = "Dell Computer Corporation", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"), |
| DMI_MATCH(DMI_CHASSIS_TYPE, "8"), |
| }, |
| }, |
| { } |
| }; |
| |
| static struct dmi_system_id __devinitdata dell_blacklist[] = { |
| /* Supported by compal-laptop */ |
| { |
| .ident = "Dell Mini 9", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 910"), |
| }, |
| }, |
| { |
| .ident = "Dell Mini 10", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1010"), |
| }, |
| }, |
| { |
| .ident = "Dell Mini 10v", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1011"), |
| }, |
| }, |
| { |
| .ident = "Dell Mini 1012", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1012"), |
| }, |
| }, |
| { |
| .ident = "Dell Inspiron 11z", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1110"), |
| }, |
| }, |
| { |
| .ident = "Dell Mini 12", |
| .matches = { |
| DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1210"), |
| }, |
| }, |
| {} |
| }; |
| |
| static struct 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_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; |
| |
| da_tokens = krealloc(da_tokens, (da_num_tokens + tokens) * |
| sizeof(struct calling_interface_token), |
| GFP_KERNEL); |
| |
| if (!da_tokens) |
| return; |
| |
| 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 */ |
| break; |
| case 0xd5: /* Protected Area Type 1 */ |
| break; |
| 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; |
| int ret = 0; |
| |
| get_buffer(); |
| dell_send_request(buffer, 17, 11); |
| |
| /* If the hardware switch controls this radio, and the hardware |
| switch is disabled, don't allow changing the software state */ |
| if ((hwswitch_state & BIT(hwswitch_bit)) && |
| !(buffer->output[1] & BIT(16))) { |
| ret = -EINVAL; |
| goto out; |
| } |
| |
| buffer->input[0] = (1 | (radio<<8) | (disable << 16)); |
| dell_send_request(buffer, 17, 11); |
| |
| out: |
| release_buffer(); |
| return ret; |
| } |
| |
| static void dell_rfkill_query(struct rfkill *rfkill, void *data) |
| { |
| int status; |
| int bit = (unsigned long)data + 16; |
| int hwswitch_bit = (unsigned long)data - 1; |
| |
| get_buffer(); |
| dell_send_request(buffer, 17, 11); |
| status = buffer->output[1]; |
| release_buffer(); |
| |
| rfkill_set_sw_state(rfkill, !!(status & BIT(bit))); |
| |
| if (hwswitch_state & (BIT(hwswitch_bit))) |
| rfkill_set_hw_state(rfkill, !(status & BIT(16))); |
| } |
| |
| static const struct rfkill_ops dell_rfkill_ops = { |
| .set_block = dell_rfkill_set, |
| .query = dell_rfkill_query, |
| }; |
| |
| static void dell_update_rfkill(struct work_struct *ignored) |
| { |
| if (wifi_rfkill) |
| dell_rfkill_query(wifi_rfkill, (void *)1); |
| if (bluetooth_rfkill) |
| dell_rfkill_query(bluetooth_rfkill, (void *)2); |
| if (wwan_rfkill) |
| dell_rfkill_query(wwan_rfkill, (void *)3); |
| } |
| static DECLARE_DELAYED_WORK(dell_rfkill_work, dell_update_rfkill); |
| |
| |
| static int __init dell_setup_rfkill(void) |
| { |
| int status; |
| int ret; |
| |
| if (dmi_check_system(dell_blacklist)) { |
| printk(KERN_INFO "dell-laptop: Blacklisted hardware detected - " |
| "not enabling rfkill\n"); |
| return 0; |
| } |
| |
| get_buffer(); |
| dell_send_request(buffer, 17, 11); |
| status = buffer->output[1]; |
| buffer->input[0] = 0x2; |
| dell_send_request(buffer, 17, 11); |
| hwswitch_state = buffer->output[1]; |
| release_buffer(); |
| |
| if ((status & (1<<2|1<<8)) == (1<<2|1<<8)) { |
| wifi_rfkill = rfkill_alloc("dell-wifi", &platform_device->dev, |
| RFKILL_TYPE_WLAN, |
| &dell_rfkill_ops, (void *) 1); |
| if (!wifi_rfkill) { |
| ret = -ENOMEM; |
| goto err_wifi; |
| } |
| ret = rfkill_register(wifi_rfkill); |
| if (ret) |
| goto err_wifi; |
| } |
| |
| if ((status & (1<<3|1<<9)) == (1<<3|1<<9)) { |
| bluetooth_rfkill = rfkill_alloc("dell-bluetooth", |
| &platform_device->dev, |
| RFKILL_TYPE_BLUETOOTH, |
| &dell_rfkill_ops, (void *) 2); |
| if (!bluetooth_rfkill) { |
| ret = -ENOMEM; |
| goto err_bluetooth; |
| } |
| ret = rfkill_register(bluetooth_rfkill); |
| if (ret) |
| goto err_bluetooth; |
| } |
| |
| if ((status & (1<<4|1<<10)) == (1<<4|1<<10)) { |
| wwan_rfkill = rfkill_alloc("dell-wwan", |
| &platform_device->dev, |
| RFKILL_TYPE_WWAN, |
| &dell_rfkill_ops, (void *) 3); |
| if (!wwan_rfkill) { |
| ret = -ENOMEM; |
| goto err_wwan; |
| } |
| ret = rfkill_register(wwan_rfkill); |
| if (ret) |
| goto err_wwan; |
| } |
| |
| return 0; |
| err_wwan: |
| rfkill_destroy(wwan_rfkill); |
| if (bluetooth_rfkill) |
| rfkill_unregister(bluetooth_rfkill); |
| err_bluetooth: |
| rfkill_destroy(bluetooth_rfkill); |
| if (wifi_rfkill) |
| rfkill_unregister(wifi_rfkill); |
| err_wifi: |
| rfkill_destroy(wifi_rfkill); |
| |
| return ret; |
| } |
| |
| static void dell_cleanup_rfkill(void) |
| { |
| if (wifi_rfkill) { |
| rfkill_unregister(wifi_rfkill); |
| rfkill_destroy(wifi_rfkill); |
| } |
| if (bluetooth_rfkill) { |
| rfkill_unregister(bluetooth_rfkill); |
| rfkill_destroy(bluetooth_rfkill); |
| } |
| if (wwan_rfkill) { |
| rfkill_unregister(wwan_rfkill); |
| rfkill_destroy(wwan_rfkill); |
| } |
| } |
| |
| static int dell_send_intensity(struct backlight_device *bd) |
| { |
| int ret = 0; |
| |
| 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 0; |
| } |
| |
| 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); |
| |
| out: |
| release_buffer(); |
| if (ret) |
| return ret; |
| return buffer->output[1]; |
| } |
| |
| static struct backlight_ops dell_ops = { |
| .get_brightness = dell_get_intensity, |
| .update_status = dell_send_intensity, |
| }; |
| |
| bool dell_laptop_i8042_filter(unsigned char data, unsigned char str, |
| struct serio *port) |
| { |
| static bool extended; |
| |
| if (str & 0x20) |
| return false; |
| |
| if (unlikely(data == 0xe0)) { |
| extended = true; |
| return false; |
| } else if (unlikely(extended)) { |
| switch (data) { |
| case 0x8: |
| schedule_delayed_work(&dell_rfkill_work, |
| round_jiffies_relative(HZ)); |
| break; |
| } |
| extended = false; |
| } |
| |
| return false; |
| } |
| |
| static int __init dell_init(void) |
| { |
| int max_intensity = 0; |
| int ret; |
| |
| if (!dmi_check_system(dell_device_table)) |
| return -ENODEV; |
| |
| dmi_walk(find_tokens, NULL); |
| |
| if (!da_tokens) { |
| printk(KERN_INFO "dell-laptop: 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) |
| goto fail_buffer; |
| buffer = page_address(bufferpage); |
| mutex_init(&buffer_mutex); |
| |
| ret = dell_setup_rfkill(); |
| |
| if (ret) { |
| printk(KERN_WARNING "dell-laptop: Unable to setup rfkill\n"); |
| goto fail_rfkill; |
| } |
| |
| ret = i8042_install_filter(dell_laptop_i8042_filter); |
| if (ret) { |
| printk(KERN_WARNING |
| "dell-laptop: Unable to install key filter\n"); |
| goto fail_filter; |
| } |
| |
| #ifdef CONFIG_ACPI |
| /* In the event of an ACPI backlight being available, don't |
| * register the platform controller. |
| */ |
| 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.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); |
| fail_filter: |
| dell_cleanup_rfkill(); |
| fail_rfkill: |
| free_page((unsigned long)bufferpage); |
| fail_buffer: |
| platform_device_del(platform_device); |
| fail_platform_device2: |
| platform_device_put(platform_device); |
| fail_platform_device1: |
| platform_driver_unregister(&platform_driver); |
| fail_platform_driver: |
| kfree(da_tokens); |
| return ret; |
| } |
| |
| static void __exit dell_exit(void) |
| { |
| 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"); |
| MODULE_ALIAS("dmi:*svnDellInc.:*:ct8:*"); |
| MODULE_ALIAS("dmi:*svnDellComputerCorporation.:*:ct8:*"); |