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