Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 "Crazy" James Simmons jsimmons@transvirtual.com |
3 | * | |
4 | * Sponsored by Transvirtual Technology. | |
5 | * | |
6 | * Derived from the code in h3600_ts.[ch] by Charles Flynn | |
7 | */ | |
8 | ||
9 | /* | |
10 | * Driver for the h3600 Touch Screen and other Atmel controlled devices. | |
11 | */ | |
12 | ||
13 | /* | |
14 | * This program is free software; you can redistribute it and/or modify | |
15 | * it under the terms of the GNU General Public License as published by | |
16 | * the Free Software Foundation; either version 2 of the License, or | |
17 | * (at your option) any later version. | |
18 | * | |
19 | * This program is distributed in the hope that it will be useful, | |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
22 | * GNU General Public License for more details. | |
23 | * | |
24 | * You should have received a copy of the GNU General Public License | |
25 | * along with this program; if not, write to the Free Software | |
26 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
27 | * | |
28 | * Should you need to contact me, the author, you can do so by | |
29 | * e-mail - mail your message to <jsimmons@transvirtual.com>. | |
30 | */ | |
31 | ||
32 | #include <linux/errno.h> | |
33 | #include <linux/kernel.h> | |
34 | #include <linux/module.h> | |
35 | #include <linux/slab.h> | |
36 | #include <linux/input.h> | |
37 | #include <linux/serio.h> | |
38 | #include <linux/init.h> | |
39 | #include <linux/delay.h> | |
1da177e4 LT |
40 | |
41 | /* SA1100 serial defines */ | |
a09e64fb RK |
42 | #include <mach/hardware.h> |
43 | #include <mach/irqs.h> | |
1da177e4 LT |
44 | |
45 | #define DRIVER_DESC "H3600 touchscreen driver" | |
46 | ||
47 | MODULE_AUTHOR("James Simmons <jsimmons@transvirtual.com>"); | |
48 | MODULE_DESCRIPTION(DRIVER_DESC); | |
49 | MODULE_LICENSE("GPL"); | |
50 | ||
51 | /* | |
52 | * Definitions & global arrays. | |
53 | */ | |
54 | ||
55 | /* The start and end of frame characters SOF and EOF */ | |
56 | #define CHAR_SOF 0x02 | |
57 | #define CHAR_EOF 0x03 | |
58 | #define FRAME_OVERHEAD 3 /* CHAR_SOF,CHAR_EOF,LENGTH = 3 */ | |
59 | ||
60 | /* | |
61 | Atmel events and response IDs contained in frame. | |
62 | Programmer has no control over these numbers. | |
63 | TODO there are holes - specifically 1,7,0x0a | |
64 | */ | |
65 | #define VERSION_ID 0 /* Get Version (request/respose) */ | |
66 | #define KEYBD_ID 2 /* Keyboard (event) */ | |
67 | #define TOUCHS_ID 3 /* Touch Screen (event)*/ | |
68 | #define EEPROM_READ_ID 4 /* (request/response) */ | |
69 | #define EEPROM_WRITE_ID 5 /* (request/response) */ | |
70 | #define THERMAL_ID 6 /* (request/response) */ | |
71 | #define NOTIFY_LED_ID 8 /* (request/response) */ | |
72 | #define BATTERY_ID 9 /* (request/response) */ | |
73 | #define SPI_READ_ID 0x0b /* ( request/response) */ | |
74 | #define SPI_WRITE_ID 0x0c /* ( request/response) */ | |
75 | #define FLITE_ID 0x0d /* backlight ( request/response) */ | |
76 | #define STX_ID 0xa1 /* extension pack status (req/resp) */ | |
77 | ||
78 | #define MAX_ID 14 | |
79 | ||
80 | #define H3600_MAX_LENGTH 16 | |
81 | #define H3600_KEY 0xf | |
82 | ||
83 | #define H3600_SCANCODE_RECORD 1 /* 1 -> record button */ | |
84 | #define H3600_SCANCODE_CALENDAR 2 /* 2 -> calendar */ | |
85 | #define H3600_SCANCODE_CONTACTS 3 /* 3 -> contact */ | |
86 | #define H3600_SCANCODE_Q 4 /* 4 -> Q button */ | |
87 | #define H3600_SCANCODE_START 5 /* 5 -> start menu */ | |
88 | #define H3600_SCANCODE_UP 6 /* 6 -> up */ | |
de1b963a DT |
89 | #define H3600_SCANCODE_RIGHT 7 /* 7 -> right */ |
90 | #define H3600_SCANCODE_LEFT 8 /* 8 -> left */ | |
91 | #define H3600_SCANCODE_DOWN 9 /* 9 -> down */ | |
1da177e4 | 92 | |
1da177e4 LT |
93 | /* |
94 | * Per-touchscreen data. | |
95 | */ | |
96 | struct h3600_dev { | |
eca1ed19 | 97 | struct input_dev *dev; |
1da177e4 | 98 | struct serio *serio; |
1da177e4 LT |
99 | unsigned char event; /* event ID from packet */ |
100 | unsigned char chksum; | |
101 | unsigned char len; | |
102 | unsigned char idx; | |
103 | unsigned char buf[H3600_MAX_LENGTH]; | |
104 | char phys[32]; | |
105 | }; | |
106 | ||
7d12e780 | 107 | static irqreturn_t action_button_handler(int irq, void *dev_id) |
1da177e4 | 108 | { |
de1b963a | 109 | int down = (GPLR & GPIO_BITSY_ACTION_BUTTON) ? 0 : 1; |
15aafa2f | 110 | struct input_dev *dev = dev_id; |
1da177e4 | 111 | |
1da177e4 LT |
112 | input_report_key(dev, KEY_ENTER, down); |
113 | input_sync(dev); | |
114 | ||
115 | return IRQ_HANDLED; | |
116 | } | |
117 | ||
7d12e780 | 118 | static irqreturn_t npower_button_handler(int irq, void *dev_id) |
1da177e4 | 119 | { |
de1b963a | 120 | int down = (GPLR & GPIO_BITSY_NPOWER_BUTTON) ? 0 : 1; |
15aafa2f | 121 | struct input_dev *dev = dev_id; |
1da177e4 LT |
122 | |
123 | /* | |
124 | * This interrupt is only called when we release the key. So we have | |
125 | * to fake a key press. | |
126 | */ | |
1da177e4 LT |
127 | input_report_key(dev, KEY_SUSPEND, 1); |
128 | input_report_key(dev, KEY_SUSPEND, down); | |
129 | input_sync(dev); | |
130 | ||
131 | return IRQ_HANDLED; | |
132 | } | |
133 | ||
134 | #ifdef CONFIG_PM | |
135 | ||
136 | static int flite_brightness = 25; | |
137 | ||
138 | enum flite_pwr { | |
de1b963a DT |
139 | FLITE_PWR_OFF = 0, |
140 | FLITE_PWR_ON = 1 | |
1da177e4 LT |
141 | }; |
142 | ||
143 | /* | |
144 | * h3600_flite_power: enables or disables power to frontlight, using last bright */ | |
145 | unsigned int h3600_flite_power(struct input_dev *dev, enum flite_pwr pwr) | |
146 | { | |
147 | unsigned char brightness = (pwr == FLITE_PWR_OFF) ? 0 : flite_brightness; | |
40b9b0b8 | 148 | struct h3600_dev *ts = input_get_drvdata(dev); |
1da177e4 LT |
149 | |
150 | /* Must be in this order */ | |
de1b963a | 151 | ts->serio->write(ts->serio, 1); |
1da177e4 | 152 | ts->serio->write(ts->serio, pwr); |
de1b963a | 153 | ts->serio->write(ts->serio, brightness); |
1da177e4 LT |
154 | return 0; |
155 | } | |
156 | ||
1da177e4 LT |
157 | #endif |
158 | ||
159 | /* | |
160 | * This function translates the native event packets to linux input event | |
161 | * packets. Some packets coming from serial are not touchscreen related. In | |
162 | * this case we send them off to be processed elsewhere. | |
163 | */ | |
7d12e780 | 164 | static void h3600ts_process_packet(struct h3600_dev *ts) |
1da177e4 | 165 | { |
eca1ed19 | 166 | struct input_dev *dev = ts->dev; |
1da177e4 LT |
167 | static int touched = 0; |
168 | int key, down = 0; | |
169 | ||
de1b963a DT |
170 | switch (ts->event) { |
171 | /* | |
172 | Buttons - returned as a single byte | |
173 | 7 6 5 4 3 2 1 0 | |
174 | S x x x N N N N | |
1da177e4 | 175 | |
de1b963a DT |
176 | S switch state ( 0=pressed 1=released) |
177 | x Unused. | |
178 | NNNN switch number 0-15 | |
1da177e4 | 179 | |
de1b963a DT |
180 | Note: This is true for non interrupt generated key events. |
181 | */ | |
182 | case KEYBD_ID: | |
1da177e4 LT |
183 | down = (ts->buf[0] & 0x80) ? 0 : 1; |
184 | ||
185 | switch (ts->buf[0] & 0x7f) { | |
186 | case H3600_SCANCODE_RECORD: | |
187 | key = KEY_RECORD; | |
188 | break; | |
189 | case H3600_SCANCODE_CALENDAR: | |
190 | key = KEY_PROG1; | |
191 | break; | |
192 | case H3600_SCANCODE_CONTACTS: | |
193 | key = KEY_PROG2; | |
de1b963a | 194 | break; |
1da177e4 LT |
195 | case H3600_SCANCODE_Q: |
196 | key = KEY_Q; | |
de1b963a | 197 | break; |
1da177e4 LT |
198 | case H3600_SCANCODE_START: |
199 | key = KEY_PROG3; | |
de1b963a | 200 | break; |
1da177e4 LT |
201 | case H3600_SCANCODE_UP: |
202 | key = KEY_UP; | |
de1b963a | 203 | break; |
1da177e4 LT |
204 | case H3600_SCANCODE_RIGHT: |
205 | key = KEY_RIGHT; | |
de1b963a | 206 | break; |
1da177e4 LT |
207 | case H3600_SCANCODE_LEFT: |
208 | key = KEY_LEFT; | |
de1b963a | 209 | break; |
1da177e4 LT |
210 | case H3600_SCANCODE_DOWN: |
211 | key = KEY_DOWN; | |
de1b963a | 212 | break; |
1da177e4 LT |
213 | default: |
214 | key = 0; | |
215 | } | |
de1b963a DT |
216 | if (key) |
217 | input_report_key(dev, key, down); | |
218 | break; | |
219 | /* | |
220 | * Native touchscreen event data is formatted as shown below:- | |
221 | * | |
222 | * +-------+-------+-------+-------+ | |
223 | * | Xmsb | Xlsb | Ymsb | Ylsb | | |
224 | * +-------+-------+-------+-------+ | |
225 | * byte 0 1 2 3 | |
226 | */ | |
227 | case TOUCHS_ID: | |
1da177e4 LT |
228 | if (!touched) { |
229 | input_report_key(dev, BTN_TOUCH, 1); | |
230 | touched = 1; | |
231 | } | |
232 | ||
233 | if (ts->len) { | |
234 | unsigned short x, y; | |
235 | ||
236 | x = ts->buf[0]; x <<= 8; x += ts->buf[1]; | |
de1b963a | 237 | y = ts->buf[2]; y <<= 8; y += ts->buf[3]; |
1da177e4 | 238 | |
de1b963a DT |
239 | input_report_abs(dev, ABS_X, x); |
240 | input_report_abs(dev, ABS_Y, y); | |
1da177e4 | 241 | } else { |
de1b963a | 242 | input_report_key(dev, BTN_TOUCH, 0); |
1da177e4 LT |
243 | touched = 0; |
244 | } | |
de1b963a | 245 | break; |
1da177e4 LT |
246 | default: |
247 | /* Send a non input event elsewhere */ | |
248 | break; | |
de1b963a | 249 | } |
1da177e4 LT |
250 | |
251 | input_sync(dev); | |
252 | } | |
253 | ||
254 | /* | |
255 | * h3600ts_event() handles events from the input module. | |
256 | */ | |
257 | static int h3600ts_event(struct input_dev *dev, unsigned int type, | |
de1b963a | 258 | unsigned int code, int value) |
1da177e4 | 259 | { |
eca1ed19 | 260 | #if 0 |
40b9b0b8 | 261 | struct h3600_dev *ts = input_get_drvdata(dev); |
1da177e4 LT |
262 | |
263 | switch (type) { | |
264 | case EV_LED: { | |
265 | // ts->serio->write(ts->serio, SOME_CMD); | |
266 | return 0; | |
267 | } | |
268 | } | |
269 | return -1; | |
eca1ed19 DT |
270 | #endif |
271 | return 0; | |
1da177e4 LT |
272 | } |
273 | ||
274 | /* | |
275 | Frame format | |
276 | byte 1 2 3 len + 4 | |
277 | +-------+---------------+---------------+--=------------+ | |
278 | |SOF |id |len | len bytes | Chksum | | |
279 | +-------+---------------+---------------+--=------------+ | |
280 | bit 0 7 8 11 12 15 16 | |
281 | ||
282 | +-------+---------------+-------+ | |
283 | |SOF |id |0 |Chksum | - Note Chksum does not include SOF | |
284 | +-------+---------------+-------+ | |
285 | bit 0 7 8 11 12 15 16 | |
286 | ||
287 | */ | |
288 | ||
289 | static int state; | |
290 | ||
291 | /* decode States */ | |
292 | #define STATE_SOF 0 /* start of FRAME */ | |
293 | #define STATE_ID 1 /* state where we decode the ID & len */ | |
294 | #define STATE_DATA 2 /* state where we decode data */ | |
295 | #define STATE_EOF 3 /* state where we decode checksum or EOF */ | |
296 | ||
297 | static irqreturn_t h3600ts_interrupt(struct serio *serio, unsigned char data, | |
7d12e780 | 298 | unsigned int flags) |
1da177e4 | 299 | { |
de1b963a | 300 | struct h3600_dev *ts = serio_get_drvdata(serio); |
1da177e4 LT |
301 | |
302 | /* | |
de1b963a DT |
303 | * We have a new frame coming in. |
304 | */ | |
1da177e4 LT |
305 | switch (state) { |
306 | case STATE_SOF: | |
de1b963a DT |
307 | if (data == CHAR_SOF) |
308 | state = STATE_ID; | |
1da177e4 | 309 | break; |
de1b963a | 310 | case STATE_ID: |
1da177e4 LT |
311 | ts->event = (data & 0xf0) >> 4; |
312 | ts->len = (data & 0xf); | |
313 | ts->idx = 0; | |
314 | if (ts->event >= MAX_ID) { | |
315 | state = STATE_SOF; | |
de1b963a | 316 | break; |
1da177e4 LT |
317 | } |
318 | ts->chksum = data; | |
de1b963a | 319 | state = (ts->len > 0) ? STATE_DATA : STATE_EOF; |
1da177e4 LT |
320 | break; |
321 | case STATE_DATA: | |
322 | ts->chksum += data; | |
323 | ts->buf[ts->idx]= data; | |
de1b963a DT |
324 | if (++ts->idx == ts->len) |
325 | state = STATE_EOF; | |
1da177e4 LT |
326 | break; |
327 | case STATE_EOF: | |
de1b963a DT |
328 | state = STATE_SOF; |
329 | if (data == CHAR_EOF || data == ts->chksum) | |
7d12e780 | 330 | h3600ts_process_packet(ts); |
de1b963a DT |
331 | break; |
332 | default: | |
333 | printk("Error3\n"); | |
334 | break; | |
1da177e4 LT |
335 | } |
336 | ||
337 | return IRQ_HANDLED; | |
338 | } | |
339 | ||
340 | /* | |
341 | * h3600ts_connect() is the routine that is called when someone adds a | |
342 | * new serio device that supports H3600 protocol and registers it as | |
343 | * an input device. | |
344 | */ | |
345 | static int h3600ts_connect(struct serio *serio, struct serio_driver *drv) | |
346 | { | |
347 | struct h3600_dev *ts; | |
eca1ed19 | 348 | struct input_dev *input_dev; |
1da177e4 LT |
349 | int err; |
350 | ||
eca1ed19 DT |
351 | ts = kzalloc(sizeof(struct h3600_dev), GFP_KERNEL); |
352 | input_dev = input_allocate_device(); | |
353 | if (!ts || !input_dev) { | |
354 | err = -ENOMEM; | |
355 | goto fail1; | |
356 | } | |
1da177e4 | 357 | |
eca1ed19 DT |
358 | ts->serio = serio; |
359 | ts->dev = input_dev; | |
a21466cc | 360 | snprintf(ts->phys, sizeof(ts->phys), "%s/input0", serio->phys); |
1da177e4 | 361 | |
eca1ed19 DT |
362 | input_dev->name = "H3600 TouchScreen"; |
363 | input_dev->phys = ts->phys; | |
364 | input_dev->id.bustype = BUS_RS232; | |
365 | input_dev->id.vendor = SERIO_H3600; | |
366 | input_dev->id.product = 0x0666; /* FIXME !!! We can ask the hardware */ | |
367 | input_dev->id.version = 0x0100; | |
a5394fb0 | 368 | input_dev->dev.parent = &serio->dev; |
40b9b0b8 DT |
369 | |
370 | input_set_drvdata(input_dev, ts); | |
eca1ed19 DT |
371 | |
372 | input_dev->event = h3600ts_event; | |
373 | ||
7b19ada2 JS |
374 | input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS) | |
375 | BIT_MASK(EV_LED) | BIT_MASK(EV_PWR); | |
376 | input_dev->ledbit[0] = BIT_MASK(LED_SLEEP); | |
eca1ed19 DT |
377 | input_set_abs_params(input_dev, ABS_X, 60, 985, 0, 0); |
378 | input_set_abs_params(input_dev, ABS_Y, 35, 1024, 0, 0); | |
379 | ||
380 | set_bit(KEY_RECORD, input_dev->keybit); | |
381 | set_bit(KEY_Q, input_dev->keybit); | |
382 | set_bit(KEY_PROG1, input_dev->keybit); | |
383 | set_bit(KEY_PROG2, input_dev->keybit); | |
384 | set_bit(KEY_PROG3, input_dev->keybit); | |
385 | set_bit(KEY_UP, input_dev->keybit); | |
386 | set_bit(KEY_RIGHT, input_dev->keybit); | |
387 | set_bit(KEY_LEFT, input_dev->keybit); | |
388 | set_bit(KEY_DOWN, input_dev->keybit); | |
389 | set_bit(KEY_ENTER, input_dev->keybit); | |
390 | set_bit(KEY_SUSPEND, input_dev->keybit); | |
391 | set_bit(BTN_TOUCH, input_dev->keybit); | |
1da177e4 LT |
392 | |
393 | /* Device specific stuff */ | |
de1b963a DT |
394 | set_GPIO_IRQ_edge(GPIO_BITSY_ACTION_BUTTON, GPIO_BOTH_EDGES); |
395 | set_GPIO_IRQ_edge(GPIO_BITSY_NPOWER_BUTTON, GPIO_RISING_EDGE); | |
1da177e4 | 396 | |
de1b963a | 397 | if (request_irq(IRQ_GPIO_BITSY_ACTION_BUTTON, action_button_handler, |
dace1453 | 398 | IRQF_SHARED | IRQF_DISABLED, "h3600_action", &ts->dev)) { |
1da177e4 | 399 | printk(KERN_ERR "h3600ts.c: Could not allocate Action Button IRQ!\n"); |
eca1ed19 DT |
400 | err = -EBUSY; |
401 | goto fail2; | |
1da177e4 LT |
402 | } |
403 | ||
de1b963a | 404 | if (request_irq(IRQ_GPIO_BITSY_NPOWER_BUTTON, npower_button_handler, |
dace1453 | 405 | IRQF_SHARED | IRQF_DISABLED, "h3600_suspend", &ts->dev)) { |
1da177e4 | 406 | printk(KERN_ERR "h3600ts.c: Could not allocate Power Button IRQ!\n"); |
eca1ed19 DT |
407 | err = -EBUSY; |
408 | goto fail3; | |
1da177e4 LT |
409 | } |
410 | ||
1da177e4 LT |
411 | serio_set_drvdata(serio, ts); |
412 | ||
413 | err = serio_open(serio, drv); | |
eca1ed19 | 414 | if (err) |
1da177e4 | 415 | return err; |
1da177e4 LT |
416 | |
417 | //h3600_flite_control(1, 25); /* default brightness */ | |
eca1ed19 | 418 | input_register_device(ts->dev); |
1da177e4 LT |
419 | |
420 | return 0; | |
eca1ed19 DT |
421 | |
422 | fail3: free_irq(IRQ_GPIO_BITSY_NPOWER_BUTTON, ts->dev); | |
423 | fail2: free_irq(IRQ_GPIO_BITSY_ACTION_BUTTON, ts->dev); | |
424 | fail1: serio_set_drvdata(serio, NULL); | |
425 | input_free_device(input_dev); | |
426 | kfree(ts); | |
427 | return err; | |
1da177e4 LT |
428 | } |
429 | ||
430 | /* | |
431 | * h3600ts_disconnect() is the opposite of h3600ts_connect() | |
432 | */ | |
433 | ||
434 | static void h3600ts_disconnect(struct serio *serio) | |
435 | { | |
436 | struct h3600_dev *ts = serio_get_drvdata(serio); | |
437 | ||
438 | free_irq(IRQ_GPIO_BITSY_ACTION_BUTTON, &ts->dev); | |
439 | free_irq(IRQ_GPIO_BITSY_NPOWER_BUTTON, &ts->dev); | |
eca1ed19 DT |
440 | input_get_device(ts->dev); |
441 | input_unregister_device(ts->dev); | |
1da177e4 LT |
442 | serio_close(serio); |
443 | serio_set_drvdata(serio, NULL); | |
eca1ed19 | 444 | input_put_device(ts->dev); |
1da177e4 LT |
445 | kfree(ts); |
446 | } | |
447 | ||
448 | /* | |
449 | * The serio driver structure. | |
450 | */ | |
451 | ||
452 | static struct serio_device_id h3600ts_serio_ids[] = { | |
453 | { | |
454 | .type = SERIO_RS232, | |
455 | .proto = SERIO_H3600, | |
456 | .id = SERIO_ANY, | |
457 | .extra = SERIO_ANY, | |
458 | }, | |
459 | { 0 } | |
460 | }; | |
461 | ||
462 | MODULE_DEVICE_TABLE(serio, h3600ts_serio_ids); | |
463 | ||
464 | static struct serio_driver h3600ts_drv = { | |
465 | .driver = { | |
466 | .name = "h3600ts", | |
467 | }, | |
468 | .description = DRIVER_DESC, | |
469 | .id_table = h3600ts_serio_ids, | |
470 | .interrupt = h3600ts_interrupt, | |
471 | .connect = h3600ts_connect, | |
472 | .disconnect = h3600ts_disconnect, | |
473 | }; | |
474 | ||
475 | /* | |
476 | * The functions for inserting/removing us as a module. | |
477 | */ | |
478 | ||
479 | static int __init h3600ts_init(void) | |
480 | { | |
153a9df0 | 481 | return serio_register_driver(&h3600ts_drv); |
1da177e4 LT |
482 | } |
483 | ||
484 | static void __exit h3600ts_exit(void) | |
485 | { | |
486 | serio_unregister_driver(&h3600ts_drv); | |
487 | } | |
488 | ||
489 | module_init(h3600ts_init); | |
490 | module_exit(h3600ts_exit); |