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authorEric Cooper <ecc@cmu.edu>2008-03-13 07:55:46 -0400
committerLen Brown <len.brown@intel.com>2008-04-29 10:08:06 -0400
commite59f87966adef2cb03d419530e3ade5159487d6d (patch)
tree9cdd798a987f5b71cf2281d6dfd408f15c33bf04 /drivers/misc
parenta01e035ebb552223c03f2d9138ffc73f2d4d3965 (diff)
eeepc-laptop: add base driver
This patch is based on Eric Cooper's work to clean the original asus_acpi given by Asus. It's a platform driver (/sys/devices/platform/eeepc/) wich support: - hotkeys - wlan on/off - camera on/off - cardr on/off Signed-off-by: Corentin Chary <corentincj@iksaif.net> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/misc')
-rw-r--r--drivers/misc/Kconfig11
-rw-r--r--drivers/misc/Makefile3
-rw-r--r--drivers/misc/eeepc-laptop.c442
3 files changed, 455 insertions, 1 deletions
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 297a48f85446..2264127afac7 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -351,6 +351,17 @@ config INTEL_MENLOW
351 351
352 If unsure, say N. 352 If unsure, say N.
353 353
354config EEEPC_LAPTOP
355 tristate "Eee PC Hotkey Driver (EXPERIMENTAL)"
356 depends on X86
357 depends on ACPI
358 depends on EXPERIMENTAL
359 ---help---
360 This driver supports the Fn-Fx keys on Eee PC laptops.
361 It also adds the ability to switch camera/wlan on/off.
362
363 If you have an Eee PC laptop, say Y or M here.
364
354config ENCLOSURE_SERVICES 365config ENCLOSURE_SERVICES
355 tristate "Enclosure Services" 366 tristate "Enclosure Services"
356 default n 367 default n
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 5914da434854..1952875a272e 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -7,7 +7,8 @@ obj-$(CONFIG_IBM_ASM) += ibmasm/
7obj-$(CONFIG_HDPU_FEATURES) += hdpuftrs/ 7obj-$(CONFIG_HDPU_FEATURES) += hdpuftrs/
8obj-$(CONFIG_MSI_LAPTOP) += msi-laptop.o 8obj-$(CONFIG_MSI_LAPTOP) += msi-laptop.o
9obj-$(CONFIG_ACER_WMI) += acer-wmi.o 9obj-$(CONFIG_ACER_WMI) += acer-wmi.o
10obj-$(CONFIG_ASUS_LAPTOP) += asus-laptop.o 10obj-$(CONFIG_ASUS_LAPTOP) += asus-laptop.o
11obj-$(CONFIG_EEEPC_LAPTOP) += eeepc-laptop.o
11obj-$(CONFIG_ATMEL_PWM) += atmel_pwm.o 12obj-$(CONFIG_ATMEL_PWM) += atmel_pwm.o
12obj-$(CONFIG_ATMEL_SSC) += atmel-ssc.o 13obj-$(CONFIG_ATMEL_SSC) += atmel-ssc.o
13obj-$(CONFIG_ATMEL_TCLIB) += atmel_tclib.o 14obj-$(CONFIG_ATMEL_TCLIB) += atmel_tclib.o
diff --git a/drivers/misc/eeepc-laptop.c b/drivers/misc/eeepc-laptop.c
new file mode 100644
index 000000000000..e34ff97530cd
--- /dev/null
+++ b/drivers/misc/eeepc-laptop.c
@@ -0,0 +1,442 @@
1/*
2 * eepc-laptop.c - Asus Eee PC extras
3 *
4 * Based on asus_acpi.c as patched for the Eee PC by Asus:
5 * ftp://ftp.asus.com/pub/ASUS/EeePC/701/ASUS_ACPI_071126.rar
6 * Based on eee.c from eeepc-linux
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 */
18
19#include <linux/kernel.h>
20#include <linux/module.h>
21#include <linux/init.h>
22#include <linux/types.h>
23#include <linux/platform_device.h>
24#include <acpi/acpi_drivers.h>
25#include <acpi/acpi_bus.h>
26#include <linux/uaccess.h>
27
28#define EEEPC_LAPTOP_VERSION "0.1"
29
30#define EEEPC_HOTK_NAME "Eee PC Hotkey Driver"
31#define EEEPC_HOTK_FILE "eeepc"
32#define EEEPC_HOTK_CLASS "hotkey"
33#define EEEPC_HOTK_DEVICE_NAME "Hotkey"
34#define EEEPC_HOTK_HID "ASUS010"
35
36#define EEEPC_LOG EEEPC_HOTK_FILE ": "
37#define EEEPC_ERR KERN_ERR EEEPC_LOG
38#define EEEPC_WARNING KERN_WARNING EEEPC_LOG
39#define EEEPC_NOTICE KERN_NOTICE EEEPC_LOG
40#define EEEPC_INFO KERN_INFO EEEPC_LOG
41
42/*
43 * Definitions for Asus EeePC
44 */
45#define NOTIFY_WLAN_ON 0x10
46
47enum {
48 DISABLE_ASL_WLAN = 0x0001,
49 DISABLE_ASL_BLUETOOTH = 0x0002,
50 DISABLE_ASL_IRDA = 0x0004,
51 DISABLE_ASL_CAMERA = 0x0008,
52 DISABLE_ASL_TV = 0x0010,
53 DISABLE_ASL_GPS = 0x0020,
54 DISABLE_ASL_DISPLAYSWITCH = 0x0040,
55 DISABLE_ASL_MODEM = 0x0080,
56 DISABLE_ASL_CARDREADER = 0x0100
57};
58
59enum {
60 CM_ASL_WLAN = 0,
61 CM_ASL_BLUETOOTH,
62 CM_ASL_IRDA,
63 CM_ASL_1394,
64 CM_ASL_CAMERA,
65 CM_ASL_TV,
66 CM_ASL_GPS,
67 CM_ASL_DVDROM,
68 CM_ASL_DISPLAYSWITCH,
69 CM_ASL_PANELBRIGHT,
70 CM_ASL_BIOSFLASH,
71 CM_ASL_ACPIFLASH,
72 CM_ASL_CPUFV,
73 CM_ASL_CPUTEMPERATURE,
74 CM_ASL_FANCPU,
75 CM_ASL_FANCHASSIS,
76 CM_ASL_USBPORT1,
77 CM_ASL_USBPORT2,
78 CM_ASL_USBPORT3,
79 CM_ASL_MODEM,
80 CM_ASL_CARDREADER,
81 CM_ASL_LID
82};
83
84const char *cm_getv[] = {
85 "WLDG", NULL, NULL, NULL,
86 "CAMG", NULL, NULL, NULL,
87 NULL, "PBLG", NULL, NULL,
88 "CFVG", NULL, NULL, NULL,
89 "USBG", NULL, NULL, "MODG",
90 "CRDG", "LIDG"
91};
92
93const char *cm_setv[] = {
94 "WLDS", NULL, NULL, NULL,
95 "CAMS", NULL, NULL, NULL,
96 "SDSP", "PBLS", "HDPS", NULL,
97 "CFVS", NULL, NULL, NULL,
98 "USBG", NULL, NULL, "MODS",
99 "CRDS", NULL
100};
101
102/*
103 * This is the main structure, we can use it to store useful information
104 * about the hotk device
105 */
106struct eeepc_hotk {
107 struct acpi_device *device; /* the device we are in */
108 acpi_handle handle; /* the handle of the hotk device */
109 u32 cm_supported; /* the control methods supported
110 by this BIOS */
111 uint init_flag; /* Init flags */
112 u16 event_count[128]; /* count for each event */
113};
114
115/* The actual device the driver binds to */
116static struct eeepc_hotk *ehotk;
117
118/* Platform device/driver */
119static struct platform_driver platform_driver = {
120 .driver = {
121 .name = EEEPC_HOTK_FILE,
122 .owner = THIS_MODULE,
123 }
124};
125
126static struct platform_device *platform_device;
127
128/*
129 * The hotkey driver declaration
130 */
131static int eeepc_hotk_add(struct acpi_device *device);
132static int eeepc_hotk_remove(struct acpi_device *device, int type);
133
134static const struct acpi_device_id eeepc_device_ids[] = {
135 {EEEPC_HOTK_HID, 0},
136 {"", 0},
137};
138MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
139
140static struct acpi_driver eeepc_hotk_driver = {
141 .name = EEEPC_HOTK_NAME,
142 .class = EEEPC_HOTK_CLASS,
143 .ids = eeepc_device_ids,
144 .ops = {
145 .add = eeepc_hotk_add,
146 .remove = eeepc_hotk_remove,
147 },
148};
149
150MODULE_AUTHOR("Corentin Chary, Eric Cooper");
151MODULE_DESCRIPTION(EEEPC_HOTK_NAME);
152MODULE_LICENSE("GPL");
153
154/*
155 * ACPI Helpers
156 */
157static int write_acpi_int(acpi_handle handle, const char *method, int val,
158 struct acpi_buffer *output)
159{
160 struct acpi_object_list params;
161 union acpi_object in_obj;
162 acpi_status status;
163
164 params.count = 1;
165 params.pointer = &in_obj;
166 in_obj.type = ACPI_TYPE_INTEGER;
167 in_obj.integer.value = val;
168
169 status = acpi_evaluate_object(handle, (char *)method, &params, output);
170 return (status == AE_OK ? 0 : -1);
171}
172
173static int read_acpi_int(acpi_handle handle, const char *method, int *val)
174{
175 acpi_status status;
176 ulong result;
177
178 status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
179 if (ACPI_FAILURE(status)) {
180 *val = -1;
181 return -1;
182 } else {
183 *val = result;
184 return 0;
185 }
186}
187
188static int set_acpi(int cm, int value)
189{
190 if (ehotk->cm_supported & (0x1 << cm)) {
191 const char *method = cm_setv[cm];
192 if (method == NULL)
193 return -ENODEV;
194 if (write_acpi_int(ehotk->handle, method, value, NULL))
195 printk(EEEPC_WARNING "Error writing %s\n", method);
196 }
197 return 0;
198}
199
200static int get_acpi(int cm)
201{
202 int value = -1;
203 if ((ehotk->cm_supported & (0x1 << cm))) {
204 const char *method = cm_getv[cm];
205 if (method == NULL)
206 return -ENODEV;
207 if (read_acpi_int(ehotk->handle, method, &value))
208 printk(EEEPC_WARNING "Error reading %s\n", method);
209 }
210 return value;
211}
212
213/*
214 * Sys helpers
215 */
216static int parse_arg(const char *buf, unsigned long count, int *val)
217{
218 if (!count)
219 return 0;
220 if (sscanf(buf, "%i", val) != 1)
221 return -EINVAL;
222 return count;
223}
224
225static ssize_t store_sys_acpi(int cm, const char *buf, size_t count)
226{
227 int rv, value;
228
229 rv = parse_arg(buf, count, &value);
230 if (rv > 0)
231 set_acpi(cm, value);
232 return rv;
233}
234
235static ssize_t show_sys_acpi(int cm, char *buf)
236{
237 return sprintf(buf, "%d\n", get_acpi(cm));
238}
239
240#define EEEPC_CREATE_DEVICE_ATTR(_name, _cm) \
241 static ssize_t show_##_name(struct device *dev, \
242 struct device_attribute *attr, \
243 char *buf) \
244 { \
245 return show_sys_acpi(_cm, buf); \
246 } \
247 static ssize_t store_##_name(struct device *dev, \
248 struct device_attribute *attr, \
249 const char *buf, size_t count) \
250 { \
251 return store_sys_acpi(_cm, buf, count); \
252 } \
253 static struct device_attribute dev_attr_##_name = { \
254 .attr = { \
255 .name = __stringify(_name), \
256 .mode = 0644 }, \
257 .show = show_##_name, \
258 .store = store_##_name, \
259 }
260
261EEEPC_CREATE_DEVICE_ATTR(camera, CM_ASL_CAMERA);
262EEEPC_CREATE_DEVICE_ATTR(cardr, CM_ASL_CARDREADER);
263EEEPC_CREATE_DEVICE_ATTR(disp, CM_ASL_DISPLAYSWITCH);
264EEEPC_CREATE_DEVICE_ATTR(wlan, CM_ASL_WLAN);
265
266static struct attribute *platform_attributes[] = {
267 &dev_attr_camera.attr,
268 &dev_attr_cardr.attr,
269 &dev_attr_disp.attr,
270 &dev_attr_wlan.attr,
271 NULL
272};
273
274static struct attribute_group platform_attribute_group = {
275 .attrs = platform_attributes
276};
277
278/*
279 * Hotkey functions
280 */
281static int eeepc_hotk_check(void)
282{
283 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
284 int result;
285
286 result = acpi_bus_get_status(ehotk->device);
287 if (result)
288 return result;
289 if (ehotk->device->status.present) {
290 if (write_acpi_int(ehotk->handle, "INIT", ehotk->init_flag,
291 &buffer)) {
292 printk(EEEPC_ERR "Hotkey initialization failed\n");
293 return -ENODEV;
294 } else {
295 printk(EEEPC_NOTICE "Hotkey init flags 0x%x\n",
296 ehotk->init_flag);
297 }
298 /* get control methods supported */
299 if (read_acpi_int(ehotk->handle, "CMSG"
300 , &ehotk->cm_supported)) {
301 printk(EEEPC_ERR
302 "Get control methods supported failed\n");
303 return -ENODEV;
304 } else {
305 printk(EEEPC_INFO
306 "Get control methods supported: 0x%x\n",
307 ehotk->cm_supported);
308 }
309 } else {
310 printk(EEEPC_ERR "Hotkey device not present, aborting\n");
311 return -EINVAL;
312 }
313 return 0;
314}
315
316static void notify_wlan(u32 *event)
317{
318 /* if DISABLE_ASL_WLAN is set, the notify code for fn+f2
319 will always be 0x10 */
320 if (ehotk->cm_supported & (0x1 << CM_ASL_WLAN)) {
321 const char *method = cm_getv[CM_ASL_WLAN];
322 int value;
323 if (read_acpi_int(ehotk->handle, method, &value))
324 printk(EEEPC_WARNING "Error reading %s\n",
325 method);
326 else if (value == 1)
327 *event = 0x11;
328 }
329}
330
331static void eeepc_hotk_notify(acpi_handle handle, u32 event, void *data)
332{
333 if (!ehotk)
334 return;
335 if (event == NOTIFY_WLAN_ON && (DISABLE_ASL_WLAN & ehotk->init_flag))
336 notify_wlan(&event);
337 acpi_bus_generate_proc_event(ehotk->device, event,
338 ehotk->event_count[event % 128]++);
339}
340
341static int eeepc_hotk_add(struct acpi_device *device)
342{
343 acpi_status status = AE_OK;
344 int result;
345
346 if (!device)
347 return -EINVAL;
348 printk(EEEPC_NOTICE EEEPC_HOTK_NAME "\n");
349 ehotk = kzalloc(sizeof(struct eeepc_hotk), GFP_KERNEL);
350 if (!ehotk)
351 return -ENOMEM;
352 ehotk->init_flag = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
353 ehotk->handle = device->handle;
354 strcpy(acpi_device_name(device), EEEPC_HOTK_DEVICE_NAME);
355 strcpy(acpi_device_class(device), EEEPC_HOTK_CLASS);
356 acpi_driver_data(device) = ehotk;
357 ehotk->device = device;
358 result = eeepc_hotk_check();
359 if (result)
360 goto end;
361 status = acpi_install_notify_handler(ehotk->handle, ACPI_SYSTEM_NOTIFY,
362 eeepc_hotk_notify, ehotk);
363 if (ACPI_FAILURE(status))
364 printk(EEEPC_ERR "Error installing notify handler\n");
365 end:
366 if (result) {
367 kfree(ehotk);
368 ehotk = NULL;
369 }
370 return result;
371}
372
373static int eeepc_hotk_remove(struct acpi_device *device, int type)
374{
375 acpi_status status = 0;
376
377 if (!device || !acpi_driver_data(device))
378 return -EINVAL;
379 status = acpi_remove_notify_handler(ehotk->handle, ACPI_SYSTEM_NOTIFY,
380 eeepc_hotk_notify);
381 if (ACPI_FAILURE(status))
382 printk(EEEPC_ERR "Error removing notify handler\n");
383 kfree(ehotk);
384 return 0;
385}
386
387/*
388 * exit/init
389 */
390static void __exit eeepc_laptop_exit(void)
391{
392 acpi_bus_unregister_driver(&eeepc_hotk_driver);
393 sysfs_remove_group(&platform_device->dev.kobj,
394 &platform_attribute_group);
395 platform_device_unregister(platform_device);
396 platform_driver_unregister(&platform_driver);
397}
398
399static int __init eeepc_laptop_init(void)
400{
401 struct device *dev;
402 int result;
403
404 if (acpi_disabled)
405 return -ENODEV;
406 result = acpi_bus_register_driver(&eeepc_hotk_driver);
407 if (result < 0)
408 return result;
409 if (!ehotk) {
410 acpi_bus_unregister_driver(&eeepc_hotk_driver);
411 return -ENODEV;
412 }
413 dev = acpi_get_physical_device(ehotk->device->handle);
414 /* Register platform stuff */
415 result = platform_driver_register(&platform_driver);
416 if (result)
417 goto fail_platform_driver;
418 platform_device = platform_device_alloc(EEEPC_HOTK_FILE, -1);
419 if (!platform_device) {
420 result = -ENOMEM;
421 goto fail_platform_device1;
422 }
423 result = platform_device_add(platform_device);
424 if (result)
425 goto fail_platform_device2;
426 result = sysfs_create_group(&platform_device->dev.kobj,
427 &platform_attribute_group);
428 if (result)
429 goto fail_sysfs;
430 return 0;
431fail_sysfs:
432 platform_device_del(platform_device);
433fail_platform_device2:
434 platform_device_put(platform_device);
435fail_platform_device1:
436 platform_driver_unregister(&platform_driver);
437fail_platform_driver:
438 return result;
439}
440
441module_init(eeepc_laptop_init);
442module_exit(eeepc_laptop_exit);