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19#include <linux/kernel.h>
20#include <linux/module.h>
21#include <linux/ioport.h>
22#include <linux/io.h>
23#include <linux/input-polldev.h>
24#include <linux/i2c.h>
25#include <linux/workqueue.h>
26#include <linux/leds.h>
27
28#define APANEL_NAME "Fujitsu Application Panel"
29#define APANEL_VERSION "1.3.1"
30#define APANEL "apanel"
31
32
33#define POLL_INTERVAL_DEFAULT 1000
34
35
36enum apanel_devid {
37 APANEL_DEV_NONE = 0,
38 APANEL_DEV_APPBTN = 1,
39 APANEL_DEV_CDBTN = 2,
40 APANEL_DEV_LCD = 3,
41 APANEL_DEV_LED = 4,
42
43 APANEL_DEV_MAX,
44};
45
46enum apanel_chip {
47 CHIP_NONE = 0,
48 CHIP_OZ992C = 1,
49 CHIP_OZ163T = 2,
50 CHIP_OZ711M3 = 4,
51};
52
53
54static enum apanel_chip device_chip[APANEL_DEV_MAX];
55
56#define MAX_PANEL_KEYS 12
57
58struct apanel {
59 struct input_polled_dev *ipdev;
60 struct i2c_client *client;
61 unsigned short keymap[MAX_PANEL_KEYS];
62 u16 nkeys;
63 u16 led_bits;
64 struct work_struct led_work;
65 struct led_classdev mail_led;
66};
67
68
69static int apanel_probe(struct i2c_client *, const struct i2c_device_id *);
70
71static void report_key(struct input_dev *input, unsigned keycode)
72{
73 pr_debug(APANEL ": report key %#x\n", keycode);
74 input_report_key(input, keycode, 1);
75 input_sync(input);
76
77 input_report_key(input, keycode, 0);
78 input_sync(input);
79}
80
81
82
83
84
85
86
87
88
89static void apanel_poll(struct input_polled_dev *ipdev)
90{
91 struct apanel *ap = ipdev->private;
92 struct input_dev *idev = ipdev->input;
93 u8 cmd = device_chip[APANEL_DEV_APPBTN] == CHIP_OZ992C ? 0 : 8;
94 s32 data;
95 int i;
96
97 data = i2c_smbus_read_word_data(ap->client, cmd);
98 if (data < 0)
99 return;
100
101
102 i2c_smbus_write_word_data(ap->client, cmd, 0);
103
104 if (!data)
105 return;
106
107 dev_dbg(&idev->dev, APANEL ": data %#x\n", data);
108 for (i = 0; i < idev->keycodemax; i++)
109 if ((1u << i) & data)
110 report_key(idev, ap->keymap[i]);
111}
112
113
114static void led_update(struct work_struct *work)
115{
116 struct apanel *ap = container_of(work, struct apanel, led_work);
117
118 i2c_smbus_write_word_data(ap->client, 0x10, ap->led_bits);
119}
120
121static void mail_led_set(struct led_classdev *led,
122 enum led_brightness value)
123{
124 struct apanel *ap = container_of(led, struct apanel, mail_led);
125
126 if (value != LED_OFF)
127 ap->led_bits |= 0x8000;
128 else
129 ap->led_bits &= ~0x8000;
130
131 schedule_work(&ap->led_work);
132}
133
134static int apanel_remove(struct i2c_client *client)
135{
136 struct apanel *ap = i2c_get_clientdata(client);
137
138 if (device_chip[APANEL_DEV_LED] != CHIP_NONE)
139 led_classdev_unregister(&ap->mail_led);
140
141 input_unregister_polled_device(ap->ipdev);
142 input_free_polled_device(ap->ipdev);
143
144 return 0;
145}
146
147static void apanel_shutdown(struct i2c_client *client)
148{
149 apanel_remove(client);
150}
151
152static const struct i2c_device_id apanel_id[] = {
153 { "fujitsu_apanel", 0 },
154 { }
155};
156MODULE_DEVICE_TABLE(i2c, apanel_id);
157
158static struct i2c_driver apanel_driver = {
159 .driver = {
160 .name = APANEL,
161 },
162 .probe = &apanel_probe,
163 .remove = &apanel_remove,
164 .shutdown = &apanel_shutdown,
165 .id_table = apanel_id,
166};
167
168static struct apanel apanel = {
169 .keymap = {
170 [0] = KEY_MAIL,
171 [1] = KEY_WWW,
172 [2] = KEY_PROG2,
173 [3] = KEY_PROG1,
174
175 [8] = KEY_FORWARD,
176 [9] = KEY_REWIND,
177 [10] = KEY_STOPCD,
178 [11] = KEY_PLAYPAUSE,
179
180 },
181 .mail_led = {
182 .name = "mail:blue",
183 .brightness_set = mail_led_set,
184 },
185};
186
187
188static int apanel_probe(struct i2c_client *client,
189 const struct i2c_device_id *id)
190{
191 struct apanel *ap;
192 struct input_polled_dev *ipdev;
193 struct input_dev *idev;
194 u8 cmd = device_chip[APANEL_DEV_APPBTN] == CHIP_OZ992C ? 0 : 8;
195 int i, err = -ENOMEM;
196
197 ap = &apanel;
198
199 ipdev = input_allocate_polled_device();
200 if (!ipdev)
201 goto out1;
202
203 ap->ipdev = ipdev;
204 ap->client = client;
205
206 i2c_set_clientdata(client, ap);
207
208 err = i2c_smbus_write_word_data(client, cmd, 0);
209 if (err) {
210 dev_warn(&client->dev, APANEL ": smbus write error %d\n",
211 err);
212 goto out3;
213 }
214
215 ipdev->poll = apanel_poll;
216 ipdev->poll_interval = POLL_INTERVAL_DEFAULT;
217 ipdev->private = ap;
218
219 idev = ipdev->input;
220 idev->name = APANEL_NAME " buttons";
221 idev->phys = "apanel/input0";
222 idev->id.bustype = BUS_HOST;
223 idev->dev.parent = &client->dev;
224
225 set_bit(EV_KEY, idev->evbit);
226
227 idev->keycode = ap->keymap;
228 idev->keycodesize = sizeof(ap->keymap[0]);
229 idev->keycodemax = (device_chip[APANEL_DEV_CDBTN] != CHIP_NONE) ? 12 : 4;
230
231 for (i = 0; i < idev->keycodemax; i++)
232 if (ap->keymap[i])
233 set_bit(ap->keymap[i], idev->keybit);
234
235 err = input_register_polled_device(ipdev);
236 if (err)
237 goto out3;
238
239 INIT_WORK(&ap->led_work, led_update);
240 if (device_chip[APANEL_DEV_LED] != CHIP_NONE) {
241 err = led_classdev_register(&client->dev, &ap->mail_led);
242 if (err)
243 goto out4;
244 }
245
246 return 0;
247out4:
248 input_unregister_polled_device(ipdev);
249out3:
250 input_free_polled_device(ipdev);
251out1:
252 return err;
253}
254
255
256static __init const void __iomem *bios_signature(const void __iomem *bios)
257{
258 ssize_t offset;
259 const unsigned char signature[] = "FJKEYINF";
260
261 for (offset = 0; offset < 0x10000; offset += 0x10) {
262 if (check_signature(bios + offset, signature,
263 sizeof(signature)-1))
264 return bios + offset;
265 }
266 pr_notice(APANEL ": Fujitsu BIOS signature '%s' not found...\n",
267 signature);
268 return NULL;
269}
270
271static int __init apanel_init(void)
272{
273 void __iomem *bios;
274 const void __iomem *p;
275 u8 devno;
276 unsigned char i2c_addr;
277 int found = 0;
278
279 bios = ioremap(0xF0000, 0x10000);
280
281 p = bios_signature(bios);
282 if (!p) {
283 iounmap(bios);
284 return -ENODEV;
285 }
286
287
288 p += 8;
289 i2c_addr = readb(p + 3) >> 1;
290
291 for ( ; (devno = readb(p)) & 0x7f; p += 4) {
292 unsigned char method, slave, chip;
293
294 method = readb(p + 1);
295 chip = readb(p + 2);
296 slave = readb(p + 3) >> 1;
297
298 if (slave != i2c_addr) {
299 pr_notice(APANEL ": only one SMBus slave "
300 "address supported, skipping device...\n");
301 continue;
302 }
303
304
305 switch (devno) {
306 case 6:
307 devno = APANEL_DEV_APPBTN;
308 break;
309 case 7:
310 devno = APANEL_DEV_LED;
311 break;
312 }
313
314 if (devno >= APANEL_DEV_MAX)
315 pr_notice(APANEL ": unknown device %u found\n", devno);
316 else if (device_chip[devno] != CHIP_NONE)
317 pr_warn(APANEL ": duplicate entry for devno %u\n",
318 devno);
319
320 else if (method != 1 && method != 2 && method != 4) {
321 pr_notice(APANEL ": unknown method %u for devno %u\n",
322 method, devno);
323 } else {
324 device_chip[devno] = (enum apanel_chip) chip;
325 ++found;
326 }
327 }
328 iounmap(bios);
329
330 if (found == 0) {
331 pr_info(APANEL ": no input devices reported by BIOS\n");
332 return -EIO;
333 }
334
335 return i2c_add_driver(&apanel_driver);
336}
337module_init(apanel_init);
338
339static void __exit apanel_cleanup(void)
340{
341 i2c_del_driver(&apanel_driver);
342}
343module_exit(apanel_cleanup);
344
345MODULE_AUTHOR("Stephen Hemminger <shemminger@linux-foundation.org>");
346MODULE_DESCRIPTION(APANEL_NAME " driver");
347MODULE_LICENSE("GPL");
348MODULE_VERSION(APANEL_VERSION);
349
350MODULE_ALIAS("dmi:*:svnFUJITSU:pnLifeBook*:pvr*:rvnFUJITSU:*");
351MODULE_ALIAS("dmi:*:svnFUJITSU:pnLifebook*:pvr*:rvnFUJITSU:*");
352
