2 * Driver for Dell laptop extras
4 * Copyright (c) Red Hat <mjg@redhat.com>
6 * Based on documentation in the libsmbios package, Copyright (C) 2005 Dell
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
16 #include <linux/module.h>
17 #include <linux/kernel.h>
18 #include <linux/init.h>
19 #include <linux/platform_device.h>
20 #include <linux/backlight.h>
21 #include <linux/err.h>
22 #include <linux/dmi.h>
24 #include <linux/rfkill.h>
25 #include <linux/power_supply.h>
26 #include <linux/acpi.h>
28 #include <linux/i8042.h>
29 #include <linux/slab.h>
30 #include <linux/debugfs.h>
31 #include <linux/seq_file.h>
32 #include "../../firmware/dcdbas.h"
34 #define BRIGHTNESS_TOKEN 0x7d
36 /* This structure will be modified by the firmware when we enter
37 * system management mode, hence the volatiles */
39 struct calling_interface_buffer {
42 volatile u32 input[4];
43 volatile u32 output[4];
46 struct calling_interface_token {
55 struct calling_interface_structure {
56 struct dmi_header header;
60 struct calling_interface_token tokens[];
67 static struct quirk_entry *quirks;
69 static struct quirk_entry quirk_dell_vostro_v130 = {
73 static int dmi_matched(const struct dmi_system_id *dmi)
75 quirks = dmi->driver_data;
79 static int da_command_address;
80 static int da_command_code;
81 static int da_num_tokens;
82 static struct calling_interface_token *da_tokens;
84 static struct platform_driver platform_driver = {
86 .name = "dell-laptop",
91 static struct platform_device *platform_device;
92 static struct backlight_device *dell_backlight_device;
93 static struct rfkill *wifi_rfkill;
94 static struct rfkill *bluetooth_rfkill;
95 static struct rfkill *wwan_rfkill;
97 static const struct dmi_system_id __initdata dell_device_table[] = {
99 .ident = "Dell laptop",
101 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
102 DMI_MATCH(DMI_CHASSIS_TYPE, "8"),
107 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
108 DMI_MATCH(DMI_CHASSIS_TYPE, "9"), /*Laptop*/
112 .ident = "Dell Computer Corporation",
114 DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
115 DMI_MATCH(DMI_CHASSIS_TYPE, "8"),
121 static struct dmi_system_id __devinitdata dell_blacklist[] = {
122 /* Supported by compal-laptop */
124 .ident = "Dell Mini 9",
126 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
127 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 910"),
131 .ident = "Dell Mini 10",
133 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
134 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1010"),
138 .ident = "Dell Mini 10v",
140 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
141 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1011"),
145 .ident = "Dell Mini 1012",
147 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
148 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1012"),
152 .ident = "Dell Inspiron 11z",
154 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
155 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1110"),
159 .ident = "Dell Mini 12",
161 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
162 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1210"),
168 static struct dmi_system_id __devinitdata dell_quirks[] = {
170 .callback = dmi_matched,
171 .ident = "Dell Vostro V130",
173 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
174 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V130"),
176 .driver_data = &quirk_dell_vostro_v130,
179 .callback = dmi_matched,
180 .ident = "Dell Vostro V131",
182 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
183 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"),
185 .driver_data = &quirk_dell_vostro_v130,
188 .callback = dmi_matched,
189 .ident = "Dell Vostro 3555",
191 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
192 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3555"),
194 .driver_data = &quirk_dell_vostro_v130,
197 .callback = dmi_matched,
198 .ident = "Dell Inspiron N311z",
200 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
201 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron N311z"),
203 .driver_data = &quirk_dell_vostro_v130,
206 .callback = dmi_matched,
207 .ident = "Dell Inspiron M5110",
209 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
210 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron M5110"),
212 .driver_data = &quirk_dell_vostro_v130,
216 static struct calling_interface_buffer *buffer;
217 static struct page *bufferpage;
218 static DEFINE_MUTEX(buffer_mutex);
220 static int hwswitch_state;
222 static void get_buffer(void)
224 mutex_lock(&buffer_mutex);
225 memset(buffer, 0, sizeof(struct calling_interface_buffer));
228 static void release_buffer(void)
230 mutex_unlock(&buffer_mutex);
233 static void __init parse_da_table(const struct dmi_header *dm)
235 /* Final token is a terminator, so we don't want to copy it */
236 int tokens = (dm->length-11)/sizeof(struct calling_interface_token)-1;
237 struct calling_interface_structure *table =
238 container_of(dm, struct calling_interface_structure, header);
240 /* 4 bytes of table header, plus 7 bytes of Dell header, plus at least
246 da_command_address = table->cmdIOAddress;
247 da_command_code = table->cmdIOCode;
249 da_tokens = krealloc(da_tokens, (da_num_tokens + tokens) *
250 sizeof(struct calling_interface_token),
256 memcpy(da_tokens+da_num_tokens, table->tokens,
257 sizeof(struct calling_interface_token) * tokens);
259 da_num_tokens += tokens;
262 static void __init find_tokens(const struct dmi_header *dm, void *dummy)
265 case 0xd4: /* Indexed IO */
267 case 0xd5: /* Protected Area Type 1 */
269 case 0xd6: /* Protected Area Type 2 */
271 case 0xda: /* Calling interface */
277 static int find_token_location(int tokenid)
280 for (i = 0; i < da_num_tokens; i++) {
281 if (da_tokens[i].tokenID == tokenid)
282 return da_tokens[i].location;
288 static struct calling_interface_buffer *
289 dell_send_request(struct calling_interface_buffer *buffer, int class,
292 struct smi_cmd command;
294 command.magic = SMI_CMD_MAGIC;
295 command.command_address = da_command_address;
296 command.command_code = da_command_code;
297 command.ebx = virt_to_phys(buffer);
298 command.ecx = 0x42534931;
300 buffer->class = class;
301 buffer->select = select;
303 dcdbas_smi_request(&command);
308 /* Derived from information in DellWirelessCtl.cpp:
309 Class 17, select 11 is radio control. It returns an array of 32-bit values.
311 Input byte 0 = 0: Wireless information
313 result[0]: return code
315 Bit 0: Hardware switch supported
316 Bit 1: Wifi locator supported
317 Bit 2: Wifi is supported
318 Bit 3: Bluetooth is supported
319 Bit 4: WWAN is supported
320 Bit 5: Wireless keyboard supported
322 Bit 8: Wifi is installed
323 Bit 9: Bluetooth is installed
324 Bit 10: WWAN is installed
326 Bit 16: Hardware switch is on
327 Bit 17: Wifi is blocked
328 Bit 18: Bluetooth is blocked
329 Bit 19: WWAN is blocked
331 result[2]: NVRAM size in bytes
332 result[3]: NVRAM format version number
334 Input byte 0 = 2: Wireless switch configuration
335 result[0]: return code
337 Bit 0: Wifi controlled by switch
338 Bit 1: Bluetooth controlled by switch
339 Bit 2: WWAN controlled by switch
341 Bit 7: Wireless switch config locked
342 Bit 8: Wifi locator enabled
344 Bit 15: Wifi locator setting locked
348 static int dell_rfkill_set(void *data, bool blocked)
350 int disable = blocked ? 1 : 0;
351 unsigned long radio = (unsigned long)data;
352 int hwswitch_bit = (unsigned long)data - 1;
356 dell_send_request(buffer, 17, 11);
358 /* If the hardware switch controls this radio, and the hardware
359 switch is disabled, don't allow changing the software state */
360 if ((hwswitch_state & BIT(hwswitch_bit)) &&
361 !(buffer->output[1] & BIT(16))) {
366 buffer->input[0] = (1 | (radio<<8) | (disable << 16));
367 dell_send_request(buffer, 17, 11);
374 static void dell_rfkill_query(struct rfkill *rfkill, void *data)
377 int bit = (unsigned long)data + 16;
378 int hwswitch_bit = (unsigned long)data - 1;
381 dell_send_request(buffer, 17, 11);
382 status = buffer->output[1];
385 rfkill_set_sw_state(rfkill, !!(status & BIT(bit)));
387 if (hwswitch_state & (BIT(hwswitch_bit)))
388 rfkill_set_hw_state(rfkill, !(status & BIT(16)));
391 static const struct rfkill_ops dell_rfkill_ops = {
392 .set_block = dell_rfkill_set,
393 .query = dell_rfkill_query,
396 static struct dentry *dell_laptop_dir;
398 static int dell_debugfs_show(struct seq_file *s, void *data)
403 dell_send_request(buffer, 17, 11);
404 status = buffer->output[1];
407 seq_printf(s, "status:\t0x%X\n", status);
408 seq_printf(s, "Bit 0 : Hardware switch supported: %lu\n",
410 seq_printf(s, "Bit 1 : Wifi locator supported: %lu\n",
411 (status & BIT(1)) >> 1);
412 seq_printf(s, "Bit 2 : Wifi is supported: %lu\n",
413 (status & BIT(2)) >> 2);
414 seq_printf(s, "Bit 3 : Bluetooth is supported: %lu\n",
415 (status & BIT(3)) >> 3);
416 seq_printf(s, "Bit 4 : WWAN is supported: %lu\n",
417 (status & BIT(4)) >> 4);
418 seq_printf(s, "Bit 5 : Wireless keyboard supported: %lu\n",
419 (status & BIT(5)) >> 5);
420 seq_printf(s, "Bit 8 : Wifi is installed: %lu\n",
421 (status & BIT(8)) >> 8);
422 seq_printf(s, "Bit 9 : Bluetooth is installed: %lu\n",
423 (status & BIT(9)) >> 9);
424 seq_printf(s, "Bit 10: WWAN is installed: %lu\n",
425 (status & BIT(10)) >> 10);
426 seq_printf(s, "Bit 16: Hardware switch is on: %lu\n",
427 (status & BIT(16)) >> 16);
428 seq_printf(s, "Bit 17: Wifi is blocked: %lu\n",
429 (status & BIT(17)) >> 17);
430 seq_printf(s, "Bit 18: Bluetooth is blocked: %lu\n",
431 (status & BIT(18)) >> 18);
432 seq_printf(s, "Bit 19: WWAN is blocked: %lu\n",
433 (status & BIT(19)) >> 19);
435 seq_printf(s, "\nhwswitch_state:\t0x%X\n", hwswitch_state);
436 seq_printf(s, "Bit 0 : Wifi controlled by switch: %lu\n",
437 hwswitch_state & BIT(0));
438 seq_printf(s, "Bit 1 : Bluetooth controlled by switch: %lu\n",
439 (hwswitch_state & BIT(1)) >> 1);
440 seq_printf(s, "Bit 2 : WWAN controlled by switch: %lu\n",
441 (hwswitch_state & BIT(2)) >> 2);
442 seq_printf(s, "Bit 7 : Wireless switch config locked: %lu\n",
443 (hwswitch_state & BIT(7)) >> 7);
444 seq_printf(s, "Bit 8 : Wifi locator enabled: %lu\n",
445 (hwswitch_state & BIT(8)) >> 8);
446 seq_printf(s, "Bit 15: Wifi locator setting locked: %lu\n",
447 (hwswitch_state & BIT(15)) >> 15);
452 static int dell_debugfs_open(struct inode *inode, struct file *file)
454 return single_open(file, dell_debugfs_show, inode->i_private);
457 static const struct file_operations dell_debugfs_fops = {
458 .owner = THIS_MODULE,
459 .open = dell_debugfs_open,
462 .release = single_release,
465 static void dell_update_rfkill(struct work_struct *ignored)
468 dell_rfkill_query(wifi_rfkill, (void *)1);
469 if (bluetooth_rfkill)
470 dell_rfkill_query(bluetooth_rfkill, (void *)2);
472 dell_rfkill_query(wwan_rfkill, (void *)3);
474 static DECLARE_DELAYED_WORK(dell_rfkill_work, dell_update_rfkill);
477 static int __init dell_setup_rfkill(void)
482 if (dmi_check_system(dell_blacklist)) {
483 pr_info("Blacklisted hardware detected - not enabling rfkill\n");
488 dell_send_request(buffer, 17, 11);
489 status = buffer->output[1];
490 buffer->input[0] = 0x2;
491 dell_send_request(buffer, 17, 11);
492 hwswitch_state = buffer->output[1];
495 if ((status & (1<<2|1<<8)) == (1<<2|1<<8)) {
496 wifi_rfkill = rfkill_alloc("dell-wifi", &platform_device->dev,
498 &dell_rfkill_ops, (void *) 1);
503 ret = rfkill_register(wifi_rfkill);
508 if ((status & (1<<3|1<<9)) == (1<<3|1<<9)) {
509 bluetooth_rfkill = rfkill_alloc("dell-bluetooth",
510 &platform_device->dev,
511 RFKILL_TYPE_BLUETOOTH,
512 &dell_rfkill_ops, (void *) 2);
513 if (!bluetooth_rfkill) {
517 ret = rfkill_register(bluetooth_rfkill);
522 if ((status & (1<<4|1<<10)) == (1<<4|1<<10)) {
523 wwan_rfkill = rfkill_alloc("dell-wwan",
524 &platform_device->dev,
526 &dell_rfkill_ops, (void *) 3);
531 ret = rfkill_register(wwan_rfkill);
538 rfkill_destroy(wwan_rfkill);
539 if (bluetooth_rfkill)
540 rfkill_unregister(bluetooth_rfkill);
542 rfkill_destroy(bluetooth_rfkill);
544 rfkill_unregister(wifi_rfkill);
546 rfkill_destroy(wifi_rfkill);
551 static void dell_cleanup_rfkill(void)
554 rfkill_unregister(wifi_rfkill);
555 rfkill_destroy(wifi_rfkill);
557 if (bluetooth_rfkill) {
558 rfkill_unregister(bluetooth_rfkill);
559 rfkill_destroy(bluetooth_rfkill);
562 rfkill_unregister(wwan_rfkill);
563 rfkill_destroy(wwan_rfkill);
567 static int dell_send_intensity(struct backlight_device *bd)
572 buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
573 buffer->input[1] = bd->props.brightness;
575 if (buffer->input[0] == -1) {
580 if (power_supply_is_system_supplied() > 0)
581 dell_send_request(buffer, 1, 2);
583 dell_send_request(buffer, 1, 1);
590 static int dell_get_intensity(struct backlight_device *bd)
595 buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
597 if (buffer->input[0] == -1) {
602 if (power_supply_is_system_supplied() > 0)
603 dell_send_request(buffer, 0, 2);
605 dell_send_request(buffer, 0, 1);
607 ret = buffer->output[1];
614 static const struct backlight_ops dell_ops = {
615 .get_brightness = dell_get_intensity,
616 .update_status = dell_send_intensity,
619 static void touchpad_led_on(void)
623 i8042_command(&data, command | 1 << 12);
626 static void touchpad_led_off(void)
630 i8042_command(&data, command | 1 << 12);
633 static void touchpad_led_set(struct led_classdev *led_cdev,
634 enum led_brightness value)
642 static struct led_classdev touchpad_led = {
643 .name = "dell-laptop::touchpad",
644 .brightness_set = touchpad_led_set,
645 .flags = LED_CORE_SUSPENDRESUME,
648 static int __devinit touchpad_led_init(struct device *dev)
650 return led_classdev_register(dev, &touchpad_led);
653 static void touchpad_led_exit(void)
655 led_classdev_unregister(&touchpad_led);
658 static bool dell_laptop_i8042_filter(unsigned char data, unsigned char str,
661 static bool extended;
666 if (unlikely(data == 0xe0)) {
669 } else if (unlikely(extended)) {
672 schedule_delayed_work(&dell_rfkill_work,
673 round_jiffies_relative(HZ));
682 static int __init dell_init(void)
684 int max_intensity = 0;
687 if (!dmi_check_system(dell_device_table))
691 /* find if this machine support other functions */
692 dmi_check_system(dell_quirks);
694 dmi_walk(find_tokens, NULL);
697 pr_info("Unable to find dmi tokens\n");
701 ret = platform_driver_register(&platform_driver);
703 goto fail_platform_driver;
704 platform_device = platform_device_alloc("dell-laptop", -1);
705 if (!platform_device) {
707 goto fail_platform_device1;
709 ret = platform_device_add(platform_device);
711 goto fail_platform_device2;
714 * Allocate buffer below 4GB for SMI data--only 32-bit physical addr
715 * is passed to SMI handler.
717 bufferpage = alloc_page(GFP_KERNEL | GFP_DMA32);
721 buffer = page_address(bufferpage);
723 ret = dell_setup_rfkill();
726 pr_warn("Unable to setup rfkill\n");
730 ret = i8042_install_filter(dell_laptop_i8042_filter);
732 pr_warn("Unable to install key filter\n");
736 if (quirks && quirks->touchpad_led)
737 touchpad_led_init(&platform_device->dev);
739 dell_laptop_dir = debugfs_create_dir("dell_laptop", NULL);
740 if (dell_laptop_dir != NULL)
741 debugfs_create_file("rfkill", 0444, dell_laptop_dir, NULL,
745 /* In the event of an ACPI backlight being available, don't
746 * register the platform controller.
748 if (acpi_video_backlight_support())
753 buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
754 if (buffer->input[0] != -1) {
755 dell_send_request(buffer, 0, 2);
756 max_intensity = buffer->output[3];
761 struct backlight_properties props;
762 memset(&props, 0, sizeof(struct backlight_properties));
763 props.type = BACKLIGHT_PLATFORM;
764 props.max_brightness = max_intensity;
765 dell_backlight_device = backlight_device_register("dell_backlight",
766 &platform_device->dev,
771 if (IS_ERR(dell_backlight_device)) {
772 ret = PTR_ERR(dell_backlight_device);
773 dell_backlight_device = NULL;
777 dell_backlight_device->props.brightness =
778 dell_get_intensity(dell_backlight_device);
779 backlight_update_status(dell_backlight_device);
785 i8042_remove_filter(dell_laptop_i8042_filter);
786 cancel_delayed_work_sync(&dell_rfkill_work);
788 dell_cleanup_rfkill();
790 free_page((unsigned long)bufferpage);
792 platform_device_del(platform_device);
793 fail_platform_device2:
794 platform_device_put(platform_device);
795 fail_platform_device1:
796 platform_driver_unregister(&platform_driver);
797 fail_platform_driver:
802 static void __exit dell_exit(void)
804 debugfs_remove_recursive(dell_laptop_dir);
805 if (quirks && quirks->touchpad_led)
807 i8042_remove_filter(dell_laptop_i8042_filter);
808 cancel_delayed_work_sync(&dell_rfkill_work);
809 backlight_device_unregister(dell_backlight_device);
810 dell_cleanup_rfkill();
811 if (platform_device) {
812 platform_device_unregister(platform_device);
813 platform_driver_unregister(&platform_driver);
816 free_page((unsigned long)buffer);
819 module_init(dell_init);
820 module_exit(dell_exit);
822 MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
823 MODULE_DESCRIPTION("Dell laptop driver");
824 MODULE_LICENSE("GPL");
825 MODULE_ALIAS("dmi:*svnDellInc.:*:ct8:*");
826 MODULE_ALIAS("dmi:*svnDellInc.:*:ct9:*");
827 MODULE_ALIAS("dmi:*svnDellComputerCorporation.:*:ct8:*");