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1da177e4 LT |
1 | /* |
2 | * $Id: h3600_ts_input.c,v 1.4 2002/01/23 06:39:37 jsimmons Exp $ | |
3 | * | |
4 | * Copyright (c) 2001 "Crazy" James Simmons jsimmons@transvirtual.com | |
5 | * | |
6 | * Sponsored by Transvirtual Technology. | |
7 | * | |
8 | * Derived from the code in h3600_ts.[ch] by Charles Flynn | |
9 | */ | |
10 | ||
11 | /* | |
12 | * Driver for the h3600 Touch Screen and other Atmel controlled devices. | |
13 | */ | |
14 | ||
15 | /* | |
16 | * This program is free software; you can redistribute it and/or modify | |
17 | * it under the terms of the GNU General Public License as published by | |
18 | * the Free Software Foundation; either version 2 of the License, or | |
19 | * (at your option) any later version. | |
20 | * | |
21 | * This program is distributed in the hope that it will be useful, | |
22 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
23 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
24 | * GNU General Public License for more details. | |
25 | * | |
26 | * You should have received a copy of the GNU General Public License | |
27 | * along with this program; if not, write to the Free Software | |
28 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
29 | * | |
30 | * Should you need to contact me, the author, you can do so by | |
31 | * e-mail - mail your message to <jsimmons@transvirtual.com>. | |
32 | */ | |
33 | ||
34 | #include <linux/errno.h> | |
35 | #include <linux/kernel.h> | |
36 | #include <linux/module.h> | |
37 | #include <linux/slab.h> | |
38 | #include <linux/input.h> | |
39 | #include <linux/serio.h> | |
40 | #include <linux/init.h> | |
41 | #include <linux/delay.h> | |
1da177e4 LT |
42 | |
43 | /* SA1100 serial defines */ | |
44 | #include <asm/arch/hardware.h> | |
45 | #include <asm/arch/irqs.h> | |
46 | ||
47 | #define DRIVER_DESC "H3600 touchscreen driver" | |
48 | ||
49 | MODULE_AUTHOR("James Simmons <jsimmons@transvirtual.com>"); | |
50 | MODULE_DESCRIPTION(DRIVER_DESC); | |
51 | MODULE_LICENSE("GPL"); | |
52 | ||
53 | /* | |
54 | * Definitions & global arrays. | |
55 | */ | |
56 | ||
57 | /* The start and end of frame characters SOF and EOF */ | |
58 | #define CHAR_SOF 0x02 | |
59 | #define CHAR_EOF 0x03 | |
60 | #define FRAME_OVERHEAD 3 /* CHAR_SOF,CHAR_EOF,LENGTH = 3 */ | |
61 | ||
62 | /* | |
63 | Atmel events and response IDs contained in frame. | |
64 | Programmer has no control over these numbers. | |
65 | TODO there are holes - specifically 1,7,0x0a | |
66 | */ | |
67 | #define VERSION_ID 0 /* Get Version (request/respose) */ | |
68 | #define KEYBD_ID 2 /* Keyboard (event) */ | |
69 | #define TOUCHS_ID 3 /* Touch Screen (event)*/ | |
70 | #define EEPROM_READ_ID 4 /* (request/response) */ | |
71 | #define EEPROM_WRITE_ID 5 /* (request/response) */ | |
72 | #define THERMAL_ID 6 /* (request/response) */ | |
73 | #define NOTIFY_LED_ID 8 /* (request/response) */ | |
74 | #define BATTERY_ID 9 /* (request/response) */ | |
75 | #define SPI_READ_ID 0x0b /* ( request/response) */ | |
76 | #define SPI_WRITE_ID 0x0c /* ( request/response) */ | |
77 | #define FLITE_ID 0x0d /* backlight ( request/response) */ | |
78 | #define STX_ID 0xa1 /* extension pack status (req/resp) */ | |
79 | ||
80 | #define MAX_ID 14 | |
81 | ||
82 | #define H3600_MAX_LENGTH 16 | |
83 | #define H3600_KEY 0xf | |
84 | ||
85 | #define H3600_SCANCODE_RECORD 1 /* 1 -> record button */ | |
86 | #define H3600_SCANCODE_CALENDAR 2 /* 2 -> calendar */ | |
87 | #define H3600_SCANCODE_CONTACTS 3 /* 3 -> contact */ | |
88 | #define H3600_SCANCODE_Q 4 /* 4 -> Q button */ | |
89 | #define H3600_SCANCODE_START 5 /* 5 -> start menu */ | |
90 | #define H3600_SCANCODE_UP 6 /* 6 -> up */ | |
de1b963a DT |
91 | #define H3600_SCANCODE_RIGHT 7 /* 7 -> right */ |
92 | #define H3600_SCANCODE_LEFT 8 /* 8 -> left */ | |
93 | #define H3600_SCANCODE_DOWN 9 /* 9 -> down */ | |
1da177e4 | 94 | |
1da177e4 LT |
95 | /* |
96 | * Per-touchscreen data. | |
97 | */ | |
98 | struct h3600_dev { | |
eca1ed19 | 99 | struct input_dev *dev; |
1da177e4 | 100 | struct serio *serio; |
1da177e4 LT |
101 | unsigned char event; /* event ID from packet */ |
102 | unsigned char chksum; | |
103 | unsigned char len; | |
104 | unsigned char idx; | |
105 | unsigned char buf[H3600_MAX_LENGTH]; | |
106 | char phys[32]; | |
107 | }; | |
108 | ||
109 | static irqreturn_t action_button_handler(int irq, void *dev_id, struct pt_regs *regs) | |
110 | { | |
de1b963a | 111 | int down = (GPLR & GPIO_BITSY_ACTION_BUTTON) ? 0 : 1; |
1da177e4 LT |
112 | struct input_dev *dev = (struct input_dev *) dev_id; |
113 | ||
114 | input_regs(dev, regs); | |
115 | input_report_key(dev, KEY_ENTER, down); | |
116 | input_sync(dev); | |
117 | ||
118 | return IRQ_HANDLED; | |
119 | } | |
120 | ||
121 | static irqreturn_t npower_button_handler(int irq, void *dev_id, struct pt_regs *regs) | |
122 | { | |
de1b963a | 123 | int down = (GPLR & GPIO_BITSY_NPOWER_BUTTON) ? 0 : 1; |
1da177e4 LT |
124 | struct input_dev *dev = (struct input_dev *) dev_id; |
125 | ||
126 | /* | |
127 | * This interrupt is only called when we release the key. So we have | |
128 | * to fake a key press. | |
129 | */ | |
130 | input_regs(dev, regs); | |
131 | input_report_key(dev, KEY_SUSPEND, 1); | |
132 | input_report_key(dev, KEY_SUSPEND, down); | |
133 | input_sync(dev); | |
134 | ||
135 | return IRQ_HANDLED; | |
136 | } | |
137 | ||
138 | #ifdef CONFIG_PM | |
139 | ||
140 | static int flite_brightness = 25; | |
141 | ||
142 | enum flite_pwr { | |
de1b963a DT |
143 | FLITE_PWR_OFF = 0, |
144 | FLITE_PWR_ON = 1 | |
1da177e4 LT |
145 | }; |
146 | ||
147 | /* | |
148 | * h3600_flite_power: enables or disables power to frontlight, using last bright */ | |
149 | unsigned int h3600_flite_power(struct input_dev *dev, enum flite_pwr pwr) | |
150 | { | |
151 | unsigned char brightness = (pwr == FLITE_PWR_OFF) ? 0 : flite_brightness; | |
152 | struct h3600_dev *ts = dev->private; | |
153 | ||
154 | /* Must be in this order */ | |
de1b963a | 155 | ts->serio->write(ts->serio, 1); |
1da177e4 | 156 | ts->serio->write(ts->serio, pwr); |
de1b963a | 157 | ts->serio->write(ts->serio, brightness); |
1da177e4 LT |
158 | return 0; |
159 | } | |
160 | ||
1da177e4 LT |
161 | #endif |
162 | ||
163 | /* | |
164 | * This function translates the native event packets to linux input event | |
165 | * packets. Some packets coming from serial are not touchscreen related. In | |
166 | * this case we send them off to be processed elsewhere. | |
167 | */ | |
168 | static void h3600ts_process_packet(struct h3600_dev *ts, struct pt_regs *regs) | |
169 | { | |
eca1ed19 | 170 | struct input_dev *dev = ts->dev; |
1da177e4 LT |
171 | static int touched = 0; |
172 | int key, down = 0; | |
173 | ||
174 | input_regs(dev, regs); | |
175 | ||
de1b963a DT |
176 | switch (ts->event) { |
177 | /* | |
178 | Buttons - returned as a single byte | |
179 | 7 6 5 4 3 2 1 0 | |
180 | S x x x N N N N | |
1da177e4 | 181 | |
de1b963a DT |
182 | S switch state ( 0=pressed 1=released) |
183 | x Unused. | |
184 | NNNN switch number 0-15 | |
1da177e4 | 185 | |
de1b963a DT |
186 | Note: This is true for non interrupt generated key events. |
187 | */ | |
188 | case KEYBD_ID: | |
1da177e4 LT |
189 | down = (ts->buf[0] & 0x80) ? 0 : 1; |
190 | ||
191 | switch (ts->buf[0] & 0x7f) { | |
192 | case H3600_SCANCODE_RECORD: | |
193 | key = KEY_RECORD; | |
194 | break; | |
195 | case H3600_SCANCODE_CALENDAR: | |
196 | key = KEY_PROG1; | |
197 | break; | |
198 | case H3600_SCANCODE_CONTACTS: | |
199 | key = KEY_PROG2; | |
de1b963a | 200 | break; |
1da177e4 LT |
201 | case H3600_SCANCODE_Q: |
202 | key = KEY_Q; | |
de1b963a | 203 | break; |
1da177e4 LT |
204 | case H3600_SCANCODE_START: |
205 | key = KEY_PROG3; | |
de1b963a | 206 | break; |
1da177e4 LT |
207 | case H3600_SCANCODE_UP: |
208 | key = KEY_UP; | |
de1b963a | 209 | break; |
1da177e4 LT |
210 | case H3600_SCANCODE_RIGHT: |
211 | key = KEY_RIGHT; | |
de1b963a | 212 | break; |
1da177e4 LT |
213 | case H3600_SCANCODE_LEFT: |
214 | key = KEY_LEFT; | |
de1b963a | 215 | break; |
1da177e4 LT |
216 | case H3600_SCANCODE_DOWN: |
217 | key = KEY_DOWN; | |
de1b963a | 218 | break; |
1da177e4 LT |
219 | default: |
220 | key = 0; | |
221 | } | |
de1b963a DT |
222 | if (key) |
223 | input_report_key(dev, key, down); | |
224 | break; | |
225 | /* | |
226 | * Native touchscreen event data is formatted as shown below:- | |
227 | * | |
228 | * +-------+-------+-------+-------+ | |
229 | * | Xmsb | Xlsb | Ymsb | Ylsb | | |
230 | * +-------+-------+-------+-------+ | |
231 | * byte 0 1 2 3 | |
232 | */ | |
233 | case TOUCHS_ID: | |
1da177e4 LT |
234 | if (!touched) { |
235 | input_report_key(dev, BTN_TOUCH, 1); | |
236 | touched = 1; | |
237 | } | |
238 | ||
239 | if (ts->len) { | |
240 | unsigned short x, y; | |
241 | ||
242 | x = ts->buf[0]; x <<= 8; x += ts->buf[1]; | |
de1b963a | 243 | y = ts->buf[2]; y <<= 8; y += ts->buf[3]; |
1da177e4 | 244 | |
de1b963a DT |
245 | input_report_abs(dev, ABS_X, x); |
246 | input_report_abs(dev, ABS_Y, y); | |
1da177e4 | 247 | } else { |
de1b963a | 248 | input_report_key(dev, BTN_TOUCH, 0); |
1da177e4 LT |
249 | touched = 0; |
250 | } | |
de1b963a | 251 | break; |
1da177e4 LT |
252 | default: |
253 | /* Send a non input event elsewhere */ | |
254 | break; | |
de1b963a | 255 | } |
1da177e4 LT |
256 | |
257 | input_sync(dev); | |
258 | } | |
259 | ||
260 | /* | |
261 | * h3600ts_event() handles events from the input module. | |
262 | */ | |
263 | static int h3600ts_event(struct input_dev *dev, unsigned int type, | |
de1b963a | 264 | unsigned int code, int value) |
1da177e4 | 265 | { |
eca1ed19 | 266 | #if 0 |
1da177e4 LT |
267 | struct h3600_dev *ts = dev->private; |
268 | ||
269 | switch (type) { | |
270 | case EV_LED: { | |
271 | // ts->serio->write(ts->serio, SOME_CMD); | |
272 | return 0; | |
273 | } | |
274 | } | |
275 | return -1; | |
eca1ed19 DT |
276 | #endif |
277 | return 0; | |
1da177e4 LT |
278 | } |
279 | ||
280 | /* | |
281 | Frame format | |
282 | byte 1 2 3 len + 4 | |
283 | +-------+---------------+---------------+--=------------+ | |
284 | |SOF |id |len | len bytes | Chksum | | |
285 | +-------+---------------+---------------+--=------------+ | |
286 | bit 0 7 8 11 12 15 16 | |
287 | ||
288 | +-------+---------------+-------+ | |
289 | |SOF |id |0 |Chksum | - Note Chksum does not include SOF | |
290 | +-------+---------------+-------+ | |
291 | bit 0 7 8 11 12 15 16 | |
292 | ||
293 | */ | |
294 | ||
295 | static int state; | |
296 | ||
297 | /* decode States */ | |
298 | #define STATE_SOF 0 /* start of FRAME */ | |
299 | #define STATE_ID 1 /* state where we decode the ID & len */ | |
300 | #define STATE_DATA 2 /* state where we decode data */ | |
301 | #define STATE_EOF 3 /* state where we decode checksum or EOF */ | |
302 | ||
303 | static irqreturn_t h3600ts_interrupt(struct serio *serio, unsigned char data, | |
304 | unsigned int flags, struct pt_regs *regs) | |
305 | { | |
de1b963a | 306 | struct h3600_dev *ts = serio_get_drvdata(serio); |
1da177e4 LT |
307 | |
308 | /* | |
de1b963a DT |
309 | * We have a new frame coming in. |
310 | */ | |
1da177e4 LT |
311 | switch (state) { |
312 | case STATE_SOF: | |
de1b963a DT |
313 | if (data == CHAR_SOF) |
314 | state = STATE_ID; | |
1da177e4 | 315 | break; |
de1b963a | 316 | case STATE_ID: |
1da177e4 LT |
317 | ts->event = (data & 0xf0) >> 4; |
318 | ts->len = (data & 0xf); | |
319 | ts->idx = 0; | |
320 | if (ts->event >= MAX_ID) { | |
321 | state = STATE_SOF; | |
de1b963a | 322 | break; |
1da177e4 LT |
323 | } |
324 | ts->chksum = data; | |
de1b963a | 325 | state = (ts->len > 0) ? STATE_DATA : STATE_EOF; |
1da177e4 LT |
326 | break; |
327 | case STATE_DATA: | |
328 | ts->chksum += data; | |
329 | ts->buf[ts->idx]= data; | |
de1b963a DT |
330 | if (++ts->idx == ts->len) |
331 | state = STATE_EOF; | |
1da177e4 LT |
332 | break; |
333 | case STATE_EOF: | |
de1b963a DT |
334 | state = STATE_SOF; |
335 | if (data == CHAR_EOF || data == ts->chksum) | |
1da177e4 | 336 | h3600ts_process_packet(ts, regs); |
de1b963a DT |
337 | break; |
338 | default: | |
339 | printk("Error3\n"); | |
340 | break; | |
1da177e4 LT |
341 | } |
342 | ||
343 | return IRQ_HANDLED; | |
344 | } | |
345 | ||
346 | /* | |
347 | * h3600ts_connect() is the routine that is called when someone adds a | |
348 | * new serio device that supports H3600 protocol and registers it as | |
349 | * an input device. | |
350 | */ | |
351 | static int h3600ts_connect(struct serio *serio, struct serio_driver *drv) | |
352 | { | |
353 | struct h3600_dev *ts; | |
eca1ed19 | 354 | struct input_dev *input_dev; |
1da177e4 LT |
355 | int err; |
356 | ||
eca1ed19 DT |
357 | ts = kzalloc(sizeof(struct h3600_dev), GFP_KERNEL); |
358 | input_dev = input_allocate_device(); | |
359 | if (!ts || !input_dev) { | |
360 | err = -ENOMEM; | |
361 | goto fail1; | |
362 | } | |
1da177e4 | 363 | |
eca1ed19 DT |
364 | ts->serio = serio; |
365 | ts->dev = input_dev; | |
a21466cc | 366 | snprintf(ts->phys, sizeof(ts->phys), "%s/input0", serio->phys); |
1da177e4 | 367 | |
eca1ed19 DT |
368 | input_dev->name = "H3600 TouchScreen"; |
369 | input_dev->phys = ts->phys; | |
370 | input_dev->id.bustype = BUS_RS232; | |
371 | input_dev->id.vendor = SERIO_H3600; | |
372 | input_dev->id.product = 0x0666; /* FIXME !!! We can ask the hardware */ | |
373 | input_dev->id.version = 0x0100; | |
374 | input_dev->cdev.dev = &serio->dev; | |
375 | input_dev->private = ts; | |
376 | ||
377 | input_dev->event = h3600ts_event; | |
378 | ||
379 | input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS) | BIT(EV_LED) | BIT(EV_PWR); | |
380 | input_dev->ledbit[0] = BIT(LED_SLEEP); | |
381 | input_set_abs_params(input_dev, ABS_X, 60, 985, 0, 0); | |
382 | input_set_abs_params(input_dev, ABS_Y, 35, 1024, 0, 0); | |
383 | ||
384 | set_bit(KEY_RECORD, input_dev->keybit); | |
385 | set_bit(KEY_Q, input_dev->keybit); | |
386 | set_bit(KEY_PROG1, input_dev->keybit); | |
387 | set_bit(KEY_PROG2, input_dev->keybit); | |
388 | set_bit(KEY_PROG3, input_dev->keybit); | |
389 | set_bit(KEY_UP, input_dev->keybit); | |
390 | set_bit(KEY_RIGHT, input_dev->keybit); | |
391 | set_bit(KEY_LEFT, input_dev->keybit); | |
392 | set_bit(KEY_DOWN, input_dev->keybit); | |
393 | set_bit(KEY_ENTER, input_dev->keybit); | |
394 | set_bit(KEY_SUSPEND, input_dev->keybit); | |
395 | set_bit(BTN_TOUCH, input_dev->keybit); | |
1da177e4 LT |
396 | |
397 | /* Device specific stuff */ | |
de1b963a DT |
398 | set_GPIO_IRQ_edge(GPIO_BITSY_ACTION_BUTTON, GPIO_BOTH_EDGES); |
399 | set_GPIO_IRQ_edge(GPIO_BITSY_NPOWER_BUTTON, GPIO_RISING_EDGE); | |
1da177e4 | 400 | |
de1b963a | 401 | if (request_irq(IRQ_GPIO_BITSY_ACTION_BUTTON, action_button_handler, |
6ceab8a9 | 402 | SA_SHIRQ | SA_INTERRUPT, "h3600_action", &ts->dev)) { |
1da177e4 | 403 | printk(KERN_ERR "h3600ts.c: Could not allocate Action Button IRQ!\n"); |
eca1ed19 DT |
404 | err = -EBUSY; |
405 | goto fail2; | |
1da177e4 LT |
406 | } |
407 | ||
de1b963a | 408 | if (request_irq(IRQ_GPIO_BITSY_NPOWER_BUTTON, npower_button_handler, |
6ceab8a9 | 409 | SA_SHIRQ | SA_INTERRUPT, "h3600_suspend", &ts->dev)) { |
1da177e4 | 410 | printk(KERN_ERR "h3600ts.c: Could not allocate Power Button IRQ!\n"); |
eca1ed19 DT |
411 | err = -EBUSY; |
412 | goto fail3; | |
1da177e4 LT |
413 | } |
414 | ||
1da177e4 LT |
415 | serio_set_drvdata(serio, ts); |
416 | ||
417 | err = serio_open(serio, drv); | |
eca1ed19 | 418 | if (err) |
1da177e4 | 419 | return err; |
1da177e4 LT |
420 | |
421 | //h3600_flite_control(1, 25); /* default brightness */ | |
eca1ed19 | 422 | input_register_device(ts->dev); |
1da177e4 LT |
423 | |
424 | return 0; | |
eca1ed19 DT |
425 | |
426 | fail3: free_irq(IRQ_GPIO_BITSY_NPOWER_BUTTON, ts->dev); | |
427 | fail2: free_irq(IRQ_GPIO_BITSY_ACTION_BUTTON, ts->dev); | |
428 | fail1: serio_set_drvdata(serio, NULL); | |
429 | input_free_device(input_dev); | |
430 | kfree(ts); | |
431 | return err; | |
1da177e4 LT |
432 | } |
433 | ||
434 | /* | |
435 | * h3600ts_disconnect() is the opposite of h3600ts_connect() | |
436 | */ | |
437 | ||
438 | static void h3600ts_disconnect(struct serio *serio) | |
439 | { | |
440 | struct h3600_dev *ts = serio_get_drvdata(serio); | |
441 | ||
442 | free_irq(IRQ_GPIO_BITSY_ACTION_BUTTON, &ts->dev); | |
443 | free_irq(IRQ_GPIO_BITSY_NPOWER_BUTTON, &ts->dev); | |
eca1ed19 DT |
444 | input_get_device(ts->dev); |
445 | input_unregister_device(ts->dev); | |
1da177e4 LT |
446 | serio_close(serio); |
447 | serio_set_drvdata(serio, NULL); | |
eca1ed19 | 448 | input_put_device(ts->dev); |
1da177e4 LT |
449 | kfree(ts); |
450 | } | |
451 | ||
452 | /* | |
453 | * The serio driver structure. | |
454 | */ | |
455 | ||
456 | static struct serio_device_id h3600ts_serio_ids[] = { | |
457 | { | |
458 | .type = SERIO_RS232, | |
459 | .proto = SERIO_H3600, | |
460 | .id = SERIO_ANY, | |
461 | .extra = SERIO_ANY, | |
462 | }, | |
463 | { 0 } | |
464 | }; | |
465 | ||
466 | MODULE_DEVICE_TABLE(serio, h3600ts_serio_ids); | |
467 | ||
468 | static struct serio_driver h3600ts_drv = { | |
469 | .driver = { | |
470 | .name = "h3600ts", | |
471 | }, | |
472 | .description = DRIVER_DESC, | |
473 | .id_table = h3600ts_serio_ids, | |
474 | .interrupt = h3600ts_interrupt, | |
475 | .connect = h3600ts_connect, | |
476 | .disconnect = h3600ts_disconnect, | |
477 | }; | |
478 | ||
479 | /* | |
480 | * The functions for inserting/removing us as a module. | |
481 | */ | |
482 | ||
483 | static int __init h3600ts_init(void) | |
484 | { | |
485 | serio_register_driver(&h3600ts_drv); | |
486 | return 0; | |
487 | } | |
488 | ||
489 | static void __exit h3600ts_exit(void) | |
490 | { | |
491 | serio_unregister_driver(&h3600ts_drv); | |
492 | } | |
493 | ||
494 | module_init(h3600ts_init); | |
495 | module_exit(h3600ts_exit); |