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"),
120 MODULE_DEVICE_TABLE(dmi, dell_device_table);
122 static struct dmi_system_id __devinitdata dell_blacklist[] = {
123 /* Supported by compal-laptop */
125 .ident = "Dell Mini 9",
127 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
128 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 910"),
132 .ident = "Dell Mini 10",
134 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
135 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1010"),
139 .ident = "Dell Mini 10v",
141 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
142 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1011"),
146 .ident = "Dell Mini 1012",
148 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
149 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1012"),
153 .ident = "Dell Inspiron 11z",
155 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
156 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1110"),
160 .ident = "Dell Mini 12",
162 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
163 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1210"),
169 static struct dmi_system_id __devinitdata dell_quirks[] = {
171 .callback = dmi_matched,
172 .ident = "Dell Vostro V130",
174 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
175 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V130"),
177 .driver_data = &quirk_dell_vostro_v130,
180 .callback = dmi_matched,
181 .ident = "Dell Vostro V131",
183 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
184 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"),
186 .driver_data = &quirk_dell_vostro_v130,
189 .callback = dmi_matched,
190 .ident = "Dell Vostro 3555",
192 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
193 DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3555"),
195 .driver_data = &quirk_dell_vostro_v130,
198 .callback = dmi_matched,
199 .ident = "Dell Inspiron N311z",
201 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
202 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron N311z"),
204 .driver_data = &quirk_dell_vostro_v130,
207 .callback = dmi_matched,
208 .ident = "Dell Inspiron M5110",
210 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
211 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron M5110"),
213 .driver_data = &quirk_dell_vostro_v130,
217 static struct calling_interface_buffer *buffer;
218 static struct page *bufferpage;
219 static DEFINE_MUTEX(buffer_mutex);
221 static int hwswitch_state;
223 static void get_buffer(void)
225 mutex_lock(&buffer_mutex);
226 memset(buffer, 0, sizeof(struct calling_interface_buffer));
229 static void release_buffer(void)
231 mutex_unlock(&buffer_mutex);
234 static void __init parse_da_table(const struct dmi_header *dm)
236 /* Final token is a terminator, so we don't want to copy it */
237 int tokens = (dm->length-11)/sizeof(struct calling_interface_token)-1;
238 struct calling_interface_structure *table =
239 container_of(dm, struct calling_interface_structure, header);
241 /* 4 bytes of table header, plus 7 bytes of Dell header, plus at least
247 da_command_address = table->cmdIOAddress;
248 da_command_code = table->cmdIOCode;
250 da_tokens = krealloc(da_tokens, (da_num_tokens + tokens) *
251 sizeof(struct calling_interface_token),
257 memcpy(da_tokens+da_num_tokens, table->tokens,
258 sizeof(struct calling_interface_token) * tokens);
260 da_num_tokens += tokens;
263 static void __init find_tokens(const struct dmi_header *dm, void *dummy)
266 case 0xd4: /* Indexed IO */
267 case 0xd5: /* Protected Area Type 1 */
268 case 0xd6: /* Protected Area Type 2 */
270 case 0xda: /* Calling interface */
276 static int find_token_location(int tokenid)
279 for (i = 0; i < da_num_tokens; i++) {
280 if (da_tokens[i].tokenID == tokenid)
281 return da_tokens[i].location;
287 static struct calling_interface_buffer *
288 dell_send_request(struct calling_interface_buffer *buffer, int class,
291 struct smi_cmd command;
293 command.magic = SMI_CMD_MAGIC;
294 command.command_address = da_command_address;
295 command.command_code = da_command_code;
296 command.ebx = virt_to_phys(buffer);
297 command.ecx = 0x42534931;
299 buffer->class = class;
300 buffer->select = select;
302 dcdbas_smi_request(&command);
307 /* Derived from information in DellWirelessCtl.cpp:
308 Class 17, select 11 is radio control. It returns an array of 32-bit values.
310 Input byte 0 = 0: Wireless information
312 result[0]: return code
314 Bit 0: Hardware switch supported
315 Bit 1: Wifi locator supported
316 Bit 2: Wifi is supported
317 Bit 3: Bluetooth is supported
318 Bit 4: WWAN is supported
319 Bit 5: Wireless keyboard supported
321 Bit 8: Wifi is installed
322 Bit 9: Bluetooth is installed
323 Bit 10: WWAN is installed
325 Bit 16: Hardware switch is on
326 Bit 17: Wifi is blocked
327 Bit 18: Bluetooth is blocked
328 Bit 19: WWAN is blocked
330 result[2]: NVRAM size in bytes
331 result[3]: NVRAM format version number
333 Input byte 0 = 2: Wireless switch configuration
334 result[0]: return code
336 Bit 0: Wifi controlled by switch
337 Bit 1: Bluetooth controlled by switch
338 Bit 2: WWAN controlled by switch
340 Bit 7: Wireless switch config locked
341 Bit 8: Wifi locator enabled
343 Bit 15: Wifi locator setting locked
347 static int dell_rfkill_set(void *data, bool blocked)
349 int disable = blocked ? 1 : 0;
350 unsigned long radio = (unsigned long)data;
351 int hwswitch_bit = (unsigned long)data - 1;
355 dell_send_request(buffer, 17, 11);
357 /* If the hardware switch controls this radio, and the hardware
358 switch is disabled, don't allow changing the software state */
359 if ((hwswitch_state & BIT(hwswitch_bit)) &&
360 !(buffer->output[1] & BIT(16))) {
365 buffer->input[0] = (1 | (radio<<8) | (disable << 16));
366 dell_send_request(buffer, 17, 11);
373 static void dell_rfkill_query(struct rfkill *rfkill, void *data)
376 int bit = (unsigned long)data + 16;
377 int hwswitch_bit = (unsigned long)data - 1;
380 dell_send_request(buffer, 17, 11);
381 status = buffer->output[1];
384 rfkill_set_sw_state(rfkill, !!(status & BIT(bit)));
386 if (hwswitch_state & (BIT(hwswitch_bit)))
387 rfkill_set_hw_state(rfkill, !(status & BIT(16)));
390 static const struct rfkill_ops dell_rfkill_ops = {
391 .set_block = dell_rfkill_set,
392 .query = dell_rfkill_query,
395 static struct dentry *dell_laptop_dir;
397 static int dell_debugfs_show(struct seq_file *s, void *data)
402 dell_send_request(buffer, 17, 11);
403 status = buffer->output[1];
406 seq_printf(s, "status:\t0x%X\n", status);
407 seq_printf(s, "Bit 0 : Hardware switch supported: %lu\n",
409 seq_printf(s, "Bit 1 : Wifi locator supported: %lu\n",
410 (status & BIT(1)) >> 1);
411 seq_printf(s, "Bit 2 : Wifi is supported: %lu\n",
412 (status & BIT(2)) >> 2);
413 seq_printf(s, "Bit 3 : Bluetooth is supported: %lu\n",
414 (status & BIT(3)) >> 3);
415 seq_printf(s, "Bit 4 : WWAN is supported: %lu\n",
416 (status & BIT(4)) >> 4);
417 seq_printf(s, "Bit 5 : Wireless keyboard supported: %lu\n",
418 (status & BIT(5)) >> 5);
419 seq_printf(s, "Bit 8 : Wifi is installed: %lu\n",
420 (status & BIT(8)) >> 8);
421 seq_printf(s, "Bit 9 : Bluetooth is installed: %lu\n",
422 (status & BIT(9)) >> 9);
423 seq_printf(s, "Bit 10: WWAN is installed: %lu\n",
424 (status & BIT(10)) >> 10);
425 seq_printf(s, "Bit 16: Hardware switch is on: %lu\n",
426 (status & BIT(16)) >> 16);
427 seq_printf(s, "Bit 17: Wifi is blocked: %lu\n",
428 (status & BIT(17)) >> 17);
429 seq_printf(s, "Bit 18: Bluetooth is blocked: %lu\n",
430 (status & BIT(18)) >> 18);
431 seq_printf(s, "Bit 19: WWAN is blocked: %lu\n",
432 (status & BIT(19)) >> 19);
434 seq_printf(s, "\nhwswitch_state:\t0x%X\n", hwswitch_state);
435 seq_printf(s, "Bit 0 : Wifi controlled by switch: %lu\n",
436 hwswitch_state & BIT(0));
437 seq_printf(s, "Bit 1 : Bluetooth controlled by switch: %lu\n",
438 (hwswitch_state & BIT(1)) >> 1);
439 seq_printf(s, "Bit 2 : WWAN controlled by switch: %lu\n",
440 (hwswitch_state & BIT(2)) >> 2);
441 seq_printf(s, "Bit 7 : Wireless switch config locked: %lu\n",
442 (hwswitch_state & BIT(7)) >> 7);
443 seq_printf(s, "Bit 8 : Wifi locator enabled: %lu\n",
444 (hwswitch_state & BIT(8)) >> 8);
445 seq_printf(s, "Bit 15: Wifi locator setting locked: %lu\n",
446 (hwswitch_state & BIT(15)) >> 15);
451 static int dell_debugfs_open(struct inode *inode, struct file *file)
453 return single_open(file, dell_debugfs_show, inode->i_private);
456 static const struct file_operations dell_debugfs_fops = {
457 .owner = THIS_MODULE,
458 .open = dell_debugfs_open,
461 .release = single_release,
464 static void dell_update_rfkill(struct work_struct *ignored)
467 dell_rfkill_query(wifi_rfkill, (void *)1);
468 if (bluetooth_rfkill)
469 dell_rfkill_query(bluetooth_rfkill, (void *)2);
471 dell_rfkill_query(wwan_rfkill, (void *)3);
473 static DECLARE_DELAYED_WORK(dell_rfkill_work, dell_update_rfkill);
476 static int __init dell_setup_rfkill(void)
481 if (dmi_check_system(dell_blacklist)) {
482 pr_info("Blacklisted hardware detected - not enabling rfkill\n");
487 dell_send_request(buffer, 17, 11);
488 status = buffer->output[1];
489 buffer->input[0] = 0x2;
490 dell_send_request(buffer, 17, 11);
491 hwswitch_state = buffer->output[1];
494 if ((status & (1<<2|1<<8)) == (1<<2|1<<8)) {
495 wifi_rfkill = rfkill_alloc("dell-wifi", &platform_device->dev,
497 &dell_rfkill_ops, (void *) 1);
502 ret = rfkill_register(wifi_rfkill);
507 if ((status & (1<<3|1<<9)) == (1<<3|1<<9)) {
508 bluetooth_rfkill = rfkill_alloc("dell-bluetooth",
509 &platform_device->dev,
510 RFKILL_TYPE_BLUETOOTH,
511 &dell_rfkill_ops, (void *) 2);
512 if (!bluetooth_rfkill) {
516 ret = rfkill_register(bluetooth_rfkill);
521 if ((status & (1<<4|1<<10)) == (1<<4|1<<10)) {
522 wwan_rfkill = rfkill_alloc("dell-wwan",
523 &platform_device->dev,
525 &dell_rfkill_ops, (void *) 3);
530 ret = rfkill_register(wwan_rfkill);
537 rfkill_destroy(wwan_rfkill);
538 if (bluetooth_rfkill)
539 rfkill_unregister(bluetooth_rfkill);
541 rfkill_destroy(bluetooth_rfkill);
543 rfkill_unregister(wifi_rfkill);
545 rfkill_destroy(wifi_rfkill);
550 static void dell_cleanup_rfkill(void)
553 rfkill_unregister(wifi_rfkill);
554 rfkill_destroy(wifi_rfkill);
556 if (bluetooth_rfkill) {
557 rfkill_unregister(bluetooth_rfkill);
558 rfkill_destroy(bluetooth_rfkill);
561 rfkill_unregister(wwan_rfkill);
562 rfkill_destroy(wwan_rfkill);
566 static int dell_send_intensity(struct backlight_device *bd)
571 buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
572 buffer->input[1] = bd->props.brightness;
574 if (buffer->input[0] == -1) {
579 if (power_supply_is_system_supplied() > 0)
580 dell_send_request(buffer, 1, 2);
582 dell_send_request(buffer, 1, 1);
589 static int dell_get_intensity(struct backlight_device *bd)
594 buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
596 if (buffer->input[0] == -1) {
601 if (power_supply_is_system_supplied() > 0)
602 dell_send_request(buffer, 0, 2);
604 dell_send_request(buffer, 0, 1);
606 ret = buffer->output[1];
613 static const struct backlight_ops dell_ops = {
614 .get_brightness = dell_get_intensity,
615 .update_status = dell_send_intensity,
618 static void touchpad_led_on(void)
622 i8042_command(&data, command | 1 << 12);
625 static void touchpad_led_off(void)
629 i8042_command(&data, command | 1 << 12);
632 static void touchpad_led_set(struct led_classdev *led_cdev,
633 enum led_brightness value)
641 static struct led_classdev touchpad_led = {
642 .name = "dell-laptop::touchpad",
643 .brightness_set = touchpad_led_set,
644 .flags = LED_CORE_SUSPENDRESUME,
647 static int __devinit touchpad_led_init(struct device *dev)
649 return led_classdev_register(dev, &touchpad_led);
652 static void touchpad_led_exit(void)
654 led_classdev_unregister(&touchpad_led);
657 static bool dell_laptop_i8042_filter(unsigned char data, unsigned char str,
660 static bool extended;
665 if (unlikely(data == 0xe0)) {
668 } else if (unlikely(extended)) {
671 schedule_delayed_work(&dell_rfkill_work,
672 round_jiffies_relative(HZ));
681 static int __init dell_init(void)
683 int max_intensity = 0;
686 if (!dmi_check_system(dell_device_table))
690 /* find if this machine support other functions */
691 dmi_check_system(dell_quirks);
693 dmi_walk(find_tokens, NULL);
696 pr_info("Unable to find dmi tokens\n");
700 ret = platform_driver_register(&platform_driver);
702 goto fail_platform_driver;
703 platform_device = platform_device_alloc("dell-laptop", -1);
704 if (!platform_device) {
706 goto fail_platform_device1;
708 ret = platform_device_add(platform_device);
710 goto fail_platform_device2;
713 * Allocate buffer below 4GB for SMI data--only 32-bit physical addr
714 * is passed to SMI handler.
716 bufferpage = alloc_page(GFP_KERNEL | GFP_DMA32);
720 buffer = page_address(bufferpage);
722 ret = dell_setup_rfkill();
725 pr_warn("Unable to setup rfkill\n");
729 ret = i8042_install_filter(dell_laptop_i8042_filter);
731 pr_warn("Unable to install key filter\n");
735 if (quirks && quirks->touchpad_led)
736 touchpad_led_init(&platform_device->dev);
738 dell_laptop_dir = debugfs_create_dir("dell_laptop", NULL);
739 if (dell_laptop_dir != NULL)
740 debugfs_create_file("rfkill", 0444, dell_laptop_dir, NULL,
744 /* In the event of an ACPI backlight being available, don't
745 * register the platform controller.
747 if (acpi_video_backlight_support())
752 buffer->input[0] = find_token_location(BRIGHTNESS_TOKEN);
753 if (buffer->input[0] != -1) {
754 dell_send_request(buffer, 0, 2);
755 max_intensity = buffer->output[3];
760 struct backlight_properties props;
761 memset(&props, 0, sizeof(struct backlight_properties));
762 props.type = BACKLIGHT_PLATFORM;
763 props.max_brightness = max_intensity;
764 dell_backlight_device = backlight_device_register("dell_backlight",
765 &platform_device->dev,
770 if (IS_ERR(dell_backlight_device)) {
771 ret = PTR_ERR(dell_backlight_device);
772 dell_backlight_device = NULL;
776 dell_backlight_device->props.brightness =
777 dell_get_intensity(dell_backlight_device);
778 backlight_update_status(dell_backlight_device);
784 i8042_remove_filter(dell_laptop_i8042_filter);
785 cancel_delayed_work_sync(&dell_rfkill_work);
787 dell_cleanup_rfkill();
789 free_page((unsigned long)bufferpage);
791 platform_device_del(platform_device);
792 fail_platform_device2:
793 platform_device_put(platform_device);
794 fail_platform_device1:
795 platform_driver_unregister(&platform_driver);
796 fail_platform_driver:
801 static void __exit dell_exit(void)
803 debugfs_remove_recursive(dell_laptop_dir);
804 if (quirks && quirks->touchpad_led)
806 i8042_remove_filter(dell_laptop_i8042_filter);
807 cancel_delayed_work_sync(&dell_rfkill_work);
808 backlight_device_unregister(dell_backlight_device);
809 dell_cleanup_rfkill();
810 if (platform_device) {
811 platform_device_unregister(platform_device);
812 platform_driver_unregister(&platform_driver);
815 free_page((unsigned long)buffer);
818 module_init(dell_init);
819 module_exit(dell_exit);
821 MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
822 MODULE_DESCRIPTION("Dell laptop driver");
823 MODULE_LICENSE("GPL");