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52fe0cdb SH |
1 | /* |
2 | * Fujitsu Lifebook Application Panel button drive | |
3 | * | |
4 | * Copyright (C) 2007 Stephen Hemminger <shemminger@linux-foundation.org> | |
5 | * Copyright (C) 2001-2003 Jochen Eisinger <jochen@penguin-breeder.org> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License version 2 as published by | |
9 | * the Free Software Foundation. | |
10 | * | |
11 | * Many Fujitsu Lifebook laptops have a small panel of buttons that are | |
12 | * accessible via the i2c/smbus interface. This driver polls those | |
13 | * buttons and generates input events. | |
14 | * | |
15 | * For more details see: | |
16 | * http://apanel.sourceforge.net/tech.php | |
17 | */ | |
18 | ||
19 | #include <linux/kernel.h> | |
20 | #include <linux/module.h> | |
21 | #include <linux/ioport.h> | |
22 | #include <linux/io.h> | |
52fe0cdb SH |
23 | #include <linux/input-polldev.h> |
24 | #include <linux/i2c.h> | |
52fe0cdb SH |
25 | #include <linux/leds.h> |
26 | ||
27 | #define APANEL_NAME "Fujitsu Application Panel" | |
52fe0cdb SH |
28 | #define APANEL "apanel" |
29 | ||
30 | /* How often we poll keys - msecs */ | |
31 | #define POLL_INTERVAL_DEFAULT 1000 | |
32 | ||
33 | /* Magic constants in BIOS that tell about buttons */ | |
34 | enum apanel_devid { | |
35 | APANEL_DEV_NONE = 0, | |
36 | APANEL_DEV_APPBTN = 1, | |
37 | APANEL_DEV_CDBTN = 2, | |
38 | APANEL_DEV_LCD = 3, | |
39 | APANEL_DEV_LED = 4, | |
40 | ||
41 | APANEL_DEV_MAX, | |
42 | }; | |
43 | ||
44 | enum apanel_chip { | |
45 | CHIP_NONE = 0, | |
46 | CHIP_OZ992C = 1, | |
47 | CHIP_OZ163T = 2, | |
48 | CHIP_OZ711M3 = 4, | |
49 | }; | |
50 | ||
51 | /* Result of BIOS snooping/probing -- what features are supported */ | |
52 | static enum apanel_chip device_chip[APANEL_DEV_MAX]; | |
53 | ||
54 | #define MAX_PANEL_KEYS 12 | |
55 | ||
56 | struct apanel { | |
57 | struct input_polled_dev *ipdev; | |
1561bfe5 | 58 | struct i2c_client *client; |
52fe0cdb SH |
59 | unsigned short keymap[MAX_PANEL_KEYS]; |
60 | u16 nkeys; | |
52fe0cdb SH |
61 | struct led_classdev mail_led; |
62 | }; | |
63 | ||
64 | ||
1561bfe5 | 65 | static int apanel_probe(struct i2c_client *, const struct i2c_device_id *); |
52fe0cdb SH |
66 | |
67 | static void report_key(struct input_dev *input, unsigned keycode) | |
68 | { | |
69 | pr_debug(APANEL ": report key %#x\n", keycode); | |
70 | input_report_key(input, keycode, 1); | |
71 | input_sync(input); | |
72 | ||
73 | input_report_key(input, keycode, 0); | |
74 | input_sync(input); | |
75 | } | |
76 | ||
77 | /* Poll for key changes | |
78 | * | |
79 | * Read Application keys via SMI | |
80 | * A (0x4), B (0x8), Internet (0x2), Email (0x1). | |
81 | * | |
82 | * CD keys: | |
83 | * Forward (0x100), Rewind (0x200), Stop (0x400), Pause (0x800) | |
84 | */ | |
85 | static void apanel_poll(struct input_polled_dev *ipdev) | |
86 | { | |
87 | struct apanel *ap = ipdev->private; | |
88 | struct input_dev *idev = ipdev->input; | |
89 | u8 cmd = device_chip[APANEL_DEV_APPBTN] == CHIP_OZ992C ? 0 : 8; | |
90 | s32 data; | |
91 | int i; | |
92 | ||
1561bfe5 | 93 | data = i2c_smbus_read_word_data(ap->client, cmd); |
52fe0cdb SH |
94 | if (data < 0) |
95 | return; /* ignore errors (due to ACPI??) */ | |
96 | ||
97 | /* write back to clear latch */ | |
1561bfe5 | 98 | i2c_smbus_write_word_data(ap->client, cmd, 0); |
52fe0cdb SH |
99 | |
100 | if (!data) | |
101 | return; | |
102 | ||
103 | dev_dbg(&idev->dev, APANEL ": data %#x\n", data); | |
104 | for (i = 0; i < idev->keycodemax; i++) | |
105 | if ((1u << i) & data) | |
106 | report_key(idev, ap->keymap[i]); | |
107 | } | |
108 | ||
1cd48dc5 | 109 | static int mail_led_set(struct led_classdev *led, |
52fe0cdb SH |
110 | enum led_brightness value) |
111 | { | |
112 | struct apanel *ap = container_of(led, struct apanel, mail_led); | |
1cd48dc5 | 113 | u16 led_bits = value != LED_OFF ? 0x8000 : 0x0000; |
52fe0cdb | 114 | |
1cd48dc5 | 115 | return i2c_smbus_write_word_data(ap->client, 0x10, led_bits); |
52fe0cdb SH |
116 | } |
117 | ||
1561bfe5 | 118 | static int apanel_remove(struct i2c_client *client) |
52fe0cdb SH |
119 | { |
120 | struct apanel *ap = i2c_get_clientdata(client); | |
121 | ||
122 | if (device_chip[APANEL_DEV_LED] != CHIP_NONE) | |
123 | led_classdev_unregister(&ap->mail_led); | |
124 | ||
125 | input_unregister_polled_device(ap->ipdev); | |
52fe0cdb SH |
126 | input_free_polled_device(ap->ipdev); |
127 | ||
128 | return 0; | |
129 | } | |
130 | ||
52fe0cdb SH |
131 | static void apanel_shutdown(struct i2c_client *client) |
132 | { | |
1561bfe5 | 133 | apanel_remove(client); |
52fe0cdb SH |
134 | } |
135 | ||
ce7b39a1 | 136 | static const struct i2c_device_id apanel_id[] = { |
1561bfe5 JD |
137 | { "fujitsu_apanel", 0 }, |
138 | { } | |
139 | }; | |
140 | MODULE_DEVICE_TABLE(i2c, apanel_id); | |
141 | ||
52fe0cdb SH |
142 | static struct i2c_driver apanel_driver = { |
143 | .driver = { | |
144 | .name = APANEL, | |
145 | }, | |
1561bfe5 JD |
146 | .probe = &apanel_probe, |
147 | .remove = &apanel_remove, | |
52fe0cdb | 148 | .shutdown = &apanel_shutdown, |
1561bfe5 | 149 | .id_table = apanel_id, |
52fe0cdb SH |
150 | }; |
151 | ||
152 | static struct apanel apanel = { | |
52fe0cdb SH |
153 | .keymap = { |
154 | [0] = KEY_MAIL, | |
155 | [1] = KEY_WWW, | |
156 | [2] = KEY_PROG2, | |
157 | [3] = KEY_PROG1, | |
158 | ||
159 | [8] = KEY_FORWARD, | |
160 | [9] = KEY_REWIND, | |
161 | [10] = KEY_STOPCD, | |
162 | [11] = KEY_PLAYPAUSE, | |
163 | ||
164 | }, | |
165 | .mail_led = { | |
166 | .name = "mail:blue", | |
1cd48dc5 | 167 | .brightness_set_blocking = mail_led_set, |
52fe0cdb SH |
168 | }, |
169 | }; | |
170 | ||
171 | /* NB: Only one panel on the i2c. */ | |
1561bfe5 JD |
172 | static int apanel_probe(struct i2c_client *client, |
173 | const struct i2c_device_id *id) | |
52fe0cdb SH |
174 | { |
175 | struct apanel *ap; | |
176 | struct input_polled_dev *ipdev; | |
177 | struct input_dev *idev; | |
178 | u8 cmd = device_chip[APANEL_DEV_APPBTN] == CHIP_OZ992C ? 0 : 8; | |
179 | int i, err = -ENOMEM; | |
180 | ||
52fe0cdb SH |
181 | ap = &apanel; |
182 | ||
183 | ipdev = input_allocate_polled_device(); | |
184 | if (!ipdev) | |
185 | goto out1; | |
186 | ||
187 | ap->ipdev = ipdev; | |
1561bfe5 | 188 | ap->client = client; |
52fe0cdb | 189 | |
1561bfe5 | 190 | i2c_set_clientdata(client, ap); |
52fe0cdb | 191 | |
1561bfe5 | 192 | err = i2c_smbus_write_word_data(client, cmd, 0); |
52fe0cdb | 193 | if (err) { |
1561bfe5 | 194 | dev_warn(&client->dev, APANEL ": smbus write error %d\n", |
52fe0cdb SH |
195 | err); |
196 | goto out3; | |
197 | } | |
198 | ||
199 | ipdev->poll = apanel_poll; | |
200 | ipdev->poll_interval = POLL_INTERVAL_DEFAULT; | |
201 | ipdev->private = ap; | |
202 | ||
203 | idev = ipdev->input; | |
204 | idev->name = APANEL_NAME " buttons"; | |
205 | idev->phys = "apanel/input0"; | |
206 | idev->id.bustype = BUS_HOST; | |
1561bfe5 | 207 | idev->dev.parent = &client->dev; |
52fe0cdb SH |
208 | |
209 | set_bit(EV_KEY, idev->evbit); | |
210 | ||
211 | idev->keycode = ap->keymap; | |
212 | idev->keycodesize = sizeof(ap->keymap[0]); | |
213 | idev->keycodemax = (device_chip[APANEL_DEV_CDBTN] != CHIP_NONE) ? 12 : 4; | |
214 | ||
215 | for (i = 0; i < idev->keycodemax; i++) | |
216 | if (ap->keymap[i]) | |
217 | set_bit(ap->keymap[i], idev->keybit); | |
218 | ||
219 | err = input_register_polled_device(ipdev); | |
220 | if (err) | |
221 | goto out3; | |
222 | ||
52fe0cdb | 223 | if (device_chip[APANEL_DEV_LED] != CHIP_NONE) { |
1561bfe5 | 224 | err = led_classdev_register(&client->dev, &ap->mail_led); |
52fe0cdb SH |
225 | if (err) |
226 | goto out4; | |
227 | } | |
228 | ||
229 | return 0; | |
230 | out4: | |
231 | input_unregister_polled_device(ipdev); | |
232 | out3: | |
52fe0cdb SH |
233 | input_free_polled_device(ipdev); |
234 | out1: | |
235 | return err; | |
236 | } | |
237 | ||
238 | /* Scan the system ROM for the signature "FJKEYINF" */ | |
239 | static __init const void __iomem *bios_signature(const void __iomem *bios) | |
240 | { | |
241 | ssize_t offset; | |
242 | const unsigned char signature[] = "FJKEYINF"; | |
243 | ||
244 | for (offset = 0; offset < 0x10000; offset += 0x10) { | |
245 | if (check_signature(bios + offset, signature, | |
246 | sizeof(signature)-1)) | |
247 | return bios + offset; | |
248 | } | |
249 | pr_notice(APANEL ": Fujitsu BIOS signature '%s' not found...\n", | |
250 | signature); | |
251 | return NULL; | |
252 | } | |
253 | ||
254 | static int __init apanel_init(void) | |
255 | { | |
256 | void __iomem *bios; | |
257 | const void __iomem *p; | |
258 | u8 devno; | |
1561bfe5 | 259 | unsigned char i2c_addr; |
52fe0cdb SH |
260 | int found = 0; |
261 | ||
262 | bios = ioremap(0xF0000, 0x10000); /* Can't fail */ | |
263 | ||
264 | p = bios_signature(bios); | |
265 | if (!p) { | |
266 | iounmap(bios); | |
267 | return -ENODEV; | |
268 | } | |
269 | ||
270 | /* just use the first address */ | |
271 | p += 8; | |
1561bfe5 | 272 | i2c_addr = readb(p + 3) >> 1; |
52fe0cdb SH |
273 | |
274 | for ( ; (devno = readb(p)) & 0x7f; p += 4) { | |
275 | unsigned char method, slave, chip; | |
276 | ||
277 | method = readb(p + 1); | |
278 | chip = readb(p + 2); | |
279 | slave = readb(p + 3) >> 1; | |
280 | ||
1561bfe5 | 281 | if (slave != i2c_addr) { |
52fe0cdb | 282 | pr_notice(APANEL ": only one SMBus slave " |
f695c240 | 283 | "address supported, skipping device...\n"); |
52fe0cdb SH |
284 | continue; |
285 | } | |
286 | ||
287 | /* translate alternative device numbers */ | |
288 | switch (devno) { | |
289 | case 6: | |
290 | devno = APANEL_DEV_APPBTN; | |
291 | break; | |
292 | case 7: | |
293 | devno = APANEL_DEV_LED; | |
294 | break; | |
295 | } | |
296 | ||
297 | if (devno >= APANEL_DEV_MAX) | |
298 | pr_notice(APANEL ": unknown device %u found\n", devno); | |
299 | else if (device_chip[devno] != CHIP_NONE) | |
fef5f569 JP |
300 | pr_warn(APANEL ": duplicate entry for devno %u\n", |
301 | devno); | |
52fe0cdb SH |
302 | |
303 | else if (method != 1 && method != 2 && method != 4) { | |
304 | pr_notice(APANEL ": unknown method %u for devno %u\n", | |
305 | method, devno); | |
306 | } else { | |
307 | device_chip[devno] = (enum apanel_chip) chip; | |
308 | ++found; | |
309 | } | |
310 | } | |
311 | iounmap(bios); | |
312 | ||
313 | if (found == 0) { | |
314 | pr_info(APANEL ": no input devices reported by BIOS\n"); | |
315 | return -EIO; | |
316 | } | |
317 | ||
318 | return i2c_add_driver(&apanel_driver); | |
319 | } | |
320 | module_init(apanel_init); | |
321 | ||
322 | static void __exit apanel_cleanup(void) | |
323 | { | |
324 | i2c_del_driver(&apanel_driver); | |
325 | } | |
326 | module_exit(apanel_cleanup); | |
327 | ||
328 | MODULE_AUTHOR("Stephen Hemminger <shemminger@linux-foundation.org>"); | |
329 | MODULE_DESCRIPTION(APANEL_NAME " driver"); | |
330 | MODULE_LICENSE("GPL"); | |
52fe0cdb SH |
331 | |
332 | MODULE_ALIAS("dmi:*:svnFUJITSU:pnLifeBook*:pvr*:rvnFUJITSU:*"); | |
333 | MODULE_ALIAS("dmi:*:svnFUJITSU:pnLifebook*:pvr*:rvnFUJITSU:*"); |