diff options
Diffstat (limited to 'drivers/misc/dell-laptop.c')
| -rw-r--r-- | drivers/misc/dell-laptop.c | 436 |
1 files changed, 0 insertions, 436 deletions
diff --git a/drivers/misc/dell-laptop.c b/drivers/misc/dell-laptop.c deleted file mode 100644 index 4d33a2068b7..00000000000 --- a/drivers/misc/dell-laptop.c +++ /dev/null @@ -1,436 +0,0 @@ -/* - * 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 "../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 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"), - }, - }, - { } -}; - -static void 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 find_tokens(const struct dmi_header *dm) -{ - 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. - - 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 -*/ - -static int dell_rfkill_set(int radio, enum rfkill_state state) -{ - struct calling_interface_buffer buffer; - int disable = (state == RFKILL_STATE_UNBLOCKED) ? 0 : 1; - - memset(&buffer, 0, sizeof(struct calling_interface_buffer)); - buffer.input[0] = (1 | (radio<<8) | (disable << 16)); - dell_send_request(&buffer, 17, 11); - - return 0; -} - -static int dell_wifi_set(void *data, enum rfkill_state state) -{ - return dell_rfkill_set(1, state); -} - -static int dell_bluetooth_set(void *data, enum rfkill_state state) -{ - return dell_rfkill_set(2, state); -} - -static int dell_wwan_set(void *data, enum rfkill_state state) -{ - return dell_rfkill_set(3, state); -} - -static int dell_rfkill_get(int bit, enum rfkill_state *state) -{ - struct calling_interface_buffer buffer; - int status; - int new_state = RFKILL_STATE_HARD_BLOCKED; - - memset(&buffer, 0, sizeof(struct calling_interface_buffer)); - dell_send_request(&buffer, 17, 11); - status = buffer.output[1]; - - if (status & (1<<16)) - new_state = RFKILL_STATE_SOFT_BLOCKED; - - if (status & (1<<bit)) - *state = new_state; - else - *state = RFKILL_STATE_UNBLOCKED; - - return 0; -} - -static int dell_wifi_get(void *data, enum rfkill_state *state) -{ - return dell_rfkill_get(17, state); -} - -static int dell_bluetooth_get(void *data, enum rfkill_state *state) -{ - return dell_rfkill_get(18, state); -} - -static int dell_wwan_get(void *data, enum rfkill_state *state) -{ - return dell_rfkill_get(19, state); -} - -static int dell_setup_rfkill(void) -{ - struct calling_interface_buffer buffer; - int status; - int ret; - - memset(&buffer, 0, sizeof(struct calling_interface_buffer)); - dell_send_request(&buffer, 17, 11); - status = buffer.output[1]; - - if ((status & (1<<2|1<<8)) == (1<<2|1<<8)) { - wifi_rfkill = rfkill_allocate(NULL, RFKILL_TYPE_WLAN); - if (!wifi_rfkill) - goto err_wifi; - wifi_rfkill->name = "dell-wifi"; - wifi_rfkill->toggle_radio = dell_wifi_set; - wifi_rfkill->get_state = dell_wifi_get; - ret = rfkill_register(wifi_rfkill); - if (ret) - goto err_wifi; - } - - if ((status & (1<<3|1<<9)) == (1<<3|1<<9)) { - bluetooth_rfkill = rfkill_allocate(NULL, RFKILL_TYPE_BLUETOOTH); - if (!bluetooth_rfkill) - goto err_bluetooth; - bluetooth_rfkill->name = "dell-bluetooth"; - bluetooth_rfkill->toggle_radio = dell_bluetooth_set; - bluetooth_rfkill->get_state = dell_bluetooth_get; - ret = rfkill_register(bluetooth_rfkill); - if (ret) - goto err_bluetooth; - } - - if ((status & (1<<4|1<<10)) == (1<<4|1<<10)) { - wwan_rfkill = rfkill_allocate(NULL, RFKILL_TYPE_WWAN); - if (!wwan_rfkill) - goto err_wwan; - wwan_rfkill->name = "dell-wwan"; - wwan_rfkill->toggle_radio = dell_wwan_set; - wwan_rfkill->get_state = dell_wwan_get; - ret = rfkill_register(wwan_rfkill); - if (ret) - goto err_wwan; - } - - return 0; -err_wwan: - if (wwan_rfkill) - rfkill_free(wwan_rfkill); - if (bluetooth_rfkill) { - rfkill_unregister(bluetooth_rfkill); - bluetooth_rfkill = NULL; - } -err_bluetooth: - if (bluetooth_rfkill) - rfkill_free(bluetooth_rfkill); - if (wifi_rfkill) { - rfkill_unregister(wifi_rfkill); - wifi_rfkill = NULL; - } -err_wifi: - if (wifi_rfkill) - rfkill_free(wifi_rfkill); - - return ret; -} - -static int dell_send_intensity(struct backlight_device *bd) -{ - struct calling_interface_buffer buffer; - - memset(&buffer, 0, sizeof(struct calling_interface_buffer)); - buffer.input[0] = find_token_location(BRIGHTNESS_TOKEN); - buffer.input[1] = bd->props.brightness; - - if (buffer.input[0] == -1) - return -ENODEV; - - if (power_supply_is_system_supplied() > 0) - dell_send_request(&buffer, 1, 2); - else - dell_send_request(&buffer, 1, 1); - - return 0; -} - -static int dell_get_intensity(struct backlight_device *bd) -{ - struct calling_interface_buffer buffer; - - memset(&buffer, 0, sizeof(struct calling_interface_buffer)); - buffer.input[0] = find_token_location(BRIGHTNESS_TOKEN); - - if (buffer.input[0] == -1) - return -ENODEV; - - if (power_supply_is_system_supplied() > 0) - dell_send_request(&buffer, 0, 2); - else - dell_send_request(&buffer, 0, 1); - - return buffer.output[1]; -} - -static struct backlight_ops dell_ops = { - .get_brightness = dell_get_intensity, - .update_status = dell_send_intensity, -}; - -static int __init dell_init(void) -{ - struct calling_interface_buffer buffer; - int max_intensity = 0; - int ret; - - if (!dmi_check_system(dell_device_table)) - return -ENODEV; - - dmi_walk(find_tokens); - - if (!da_tokens) { - printk(KERN_INFO "dell-laptop: Unable to find dmi tokens\n"); - return -ENODEV; - } - - ret = dell_setup_rfkill(); - - if (ret) { - printk(KERN_WARNING "dell-laptop: Unable to setup rfkill\n"); - goto out; - } - -#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 - - memset(&buffer, 0, sizeof(struct calling_interface_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]; - } - - if (max_intensity) { - dell_backlight_device = backlight_device_register( - "dell_backlight", - NULL, NULL, - &dell_ops); - - if (IS_ERR(dell_backlight_device)) { - ret = PTR_ERR(dell_backlight_device); - dell_backlight_device = NULL; - goto out; - } - - dell_backlight_device->props.max_brightness = max_intensity; - dell_backlight_device->props.brightness = - dell_get_intensity(dell_backlight_device); - backlight_update_status(dell_backlight_device); - } - - return 0; -out: - if (wifi_rfkill) - rfkill_unregister(wifi_rfkill); - if (bluetooth_rfkill) - rfkill_unregister(bluetooth_rfkill); - if (wwan_rfkill) - rfkill_unregister(wwan_rfkill); - kfree(da_tokens); - return ret; -} - -static void __exit dell_exit(void) -{ - backlight_device_unregister(dell_backlight_device); - if (wifi_rfkill) - rfkill_unregister(wifi_rfkill); - if (bluetooth_rfkill) - rfkill_unregister(bluetooth_rfkill); - if (wwan_rfkill) - rfkill_unregister(wwan_rfkill); -} - -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:*"); |