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