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1/*
2 * Elo serial touchscreen driver
3 *
4 * Copyright (c) 2004 Vojtech Pavlik
5 */
6
7/*
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 as published by
10 * the Free Software Foundation.
11 */
12
13/*
14 * This driver can handle serial Elo touchscreens using either the Elo standard
15 * 'E271-2210' 10-byte protocol, Elo legacy 'E281A-4002' 6-byte protocol, Elo
16 * legacy 'E271-140' 4-byte protocol and Elo legacy 'E261-280' 3-byte protocol.
17 */
18
19#include <linux/errno.h>
20#include <linux/kernel.h>
21#include <linux/module.h>
22#include <linux/slab.h>
23#include <linux/input.h>
24#include <linux/serio.h>
25#include <linux/init.h>
26#include <linux/ctype.h>
27
28#define DRIVER_DESC "Elo serial touchscreen driver"
29
30MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
31MODULE_DESCRIPTION(DRIVER_DESC);
32MODULE_LICENSE("GPL");
33
34/*
35 * Definitions & global arrays.
36 */
37
38#define ELO_MAX_LENGTH 10
39
40#define ELO10_PACKET_LEN 8
41#define ELO10_TOUCH 0x03
42#define ELO10_PRESSURE 0x80
43
44#define ELO10_LEAD_BYTE 'U'
45
46#define ELO10_ID_CMD 'i'
47
48#define ELO10_TOUCH_PACKET 'T'
49#define ELO10_ACK_PACKET 'A'
50#define ELI10_ID_PACKET 'I'
51
52/*
53 * Per-touchscreen data.
54 */
55
56struct elo {
57 struct input_dev *dev;
58 struct serio *serio;
59 struct mutex cmd_mutex;
60 struct completion cmd_done;
61 int id;
62 int idx;
63 unsigned char expected_packet;
64 unsigned char csum;
65 unsigned char data[ELO_MAX_LENGTH];
66 unsigned char response[ELO10_PACKET_LEN];
67 char phys[32];
68};
69
70static void elo_process_data_10(struct elo *elo, unsigned char data)
71{
72 struct input_dev *dev = elo->dev;
73
74 elo->data[elo->idx] = data;
75
76 switch (elo->idx++) {
77 case 0:
78 elo->csum = 0xaa;
79 if (data != ELO10_LEAD_BYTE) {
80 dev_dbg(&elo->serio->dev,
81 "unsynchronized data: 0x%02x\n", data);
82 elo->idx = 0;
83 }
84 break;
85
86 case 9:
87 elo->idx = 0;
88 if (data != elo->csum) {
89 dev_dbg(&elo->serio->dev,
90 "bad checksum: 0x%02x, expected 0x%02x\n",
91 data, elo->csum);
92 break;
93 }
94 if (elo->data[1] != elo->expected_packet) {
95 if (elo->data[1] != ELO10_TOUCH_PACKET)
96 dev_dbg(&elo->serio->dev,
97 "unexpected packet: 0x%02x\n",
98 elo->data[1]);
99 break;
100 }
101 if (likely(elo->data[1] == ELO10_TOUCH_PACKET)) {
102 input_report_abs(dev, ABS_X, (elo->data[4] << 8) | elo->data[3]);
103 input_report_abs(dev, ABS_Y, (elo->data[6] << 8) | elo->data[5]);
104 if (elo->data[2] & ELO10_PRESSURE)
105 input_report_abs(dev, ABS_PRESSURE,
106 (elo->data[8] << 8) | elo->data[7]);
107 input_report_key(dev, BTN_TOUCH, elo->data[2] & ELO10_TOUCH);
108 input_sync(dev);
109 } else if (elo->data[1] == ELO10_ACK_PACKET) {
110 if (elo->data[2] == '0')
111 elo->expected_packet = ELO10_TOUCH_PACKET;
112 complete(&elo->cmd_done);
113 } else {
114 memcpy(elo->response, &elo->data[1], ELO10_PACKET_LEN);
115 elo->expected_packet = ELO10_ACK_PACKET;
116 }
117 break;
118 }
119 elo->csum += data;
120}
121
122static void elo_process_data_6(struct elo *elo, unsigned char data)
123{
124 struct input_dev *dev = elo->dev;
125
126 elo->data[elo->idx] = data;
127
128 switch (elo->idx++) {
129
130 case 0:
131 if ((data & 0xc0) != 0xc0)
132 elo->idx = 0;
133 break;
134
135 case 1:
136 if ((data & 0xc0) != 0x80)
137 elo->idx = 0;
138 break;
139
140 case 2:
141 if ((data & 0xc0) != 0x40)
142 elo->idx = 0;
143 break;
144
145 case 3:
146 if (data & 0xc0) {
147 elo->idx = 0;
148 break;
149 }
150
151 input_report_abs(dev, ABS_X, ((elo->data[0] & 0x3f) << 6) | (elo->data[1] & 0x3f));
152 input_report_abs(dev, ABS_Y, ((elo->data[2] & 0x3f) << 6) | (elo->data[3] & 0x3f));
153
154 if (elo->id == 2) {
155 input_report_key(dev, BTN_TOUCH, 1);
156 input_sync(dev);
157 elo->idx = 0;
158 }
159
160 break;
161
162 case 4:
163 if (data) {
164 input_sync(dev);
165 elo->idx = 0;
166 }
167 break;
168
169 case 5:
170 if ((data & 0xf0) == 0) {
171 input_report_abs(dev, ABS_PRESSURE, elo->data[5]);
172 input_report_key(dev, BTN_TOUCH, !!elo->data[5]);
173 }
174 input_sync(dev);
175 elo->idx = 0;
176 break;
177 }
178}
179
180static void elo_process_data_3(struct elo *elo, unsigned char data)
181{
182 struct input_dev *dev = elo->dev;
183
184 elo->data[elo->idx] = data;
185
186 switch (elo->idx++) {
187
188 case 0:
189 if ((data & 0x7f) != 0x01)
190 elo->idx = 0;
191 break;
192 case 2:
193 input_report_key(dev, BTN_TOUCH, !(elo->data[1] & 0x80));
194 input_report_abs(dev, ABS_X, elo->data[1]);
195 input_report_abs(dev, ABS_Y, elo->data[2]);
196 input_sync(dev);
197 elo->idx = 0;
198 break;
199 }
200}
201
202static irqreturn_t elo_interrupt(struct serio *serio,
203 unsigned char data, unsigned int flags)
204{
205 struct elo *elo = serio_get_drvdata(serio);
206
207 switch (elo->id) {
208 case 0:
209 elo_process_data_10(elo, data);
210 break;
211
212 case 1:
213 case 2:
214 elo_process_data_6(elo, data);
215 break;
216
217 case 3:
218 elo_process_data_3(elo, data);
219 break;
220 }
221
222 return IRQ_HANDLED;
223}
224
225static int elo_command_10(struct elo *elo, unsigned char *packet)
226{
227 int rc = -1;
228 int i;
229 unsigned char csum = 0xaa + ELO10_LEAD_BYTE;
230
231 mutex_lock(&elo->cmd_mutex);
232
233 serio_pause_rx(elo->serio);
234 elo->expected_packet = toupper(packet[0]);
235 init_completion(&elo->cmd_done);
236 serio_continue_rx(elo->serio);
237
238 if (serio_write(elo->serio, ELO10_LEAD_BYTE))
239 goto out;
240
241 for (i = 0; i < ELO10_PACKET_LEN; i++) {
242 csum += packet[i];
243 if (serio_write(elo->serio, packet[i]))
244 goto out;
245 }
246
247 if (serio_write(elo->serio, csum))
248 goto out;
249
250 wait_for_completion_timeout(&elo->cmd_done, HZ);
251
252 if (elo->expected_packet == ELO10_TOUCH_PACKET) {
253 /* We are back in reporting mode, the command was ACKed */
254 memcpy(packet, elo->response, ELO10_PACKET_LEN);
255 rc = 0;
256 }
257
258 out:
259 mutex_unlock(&elo->cmd_mutex);
260 return rc;
261}
262
263static int elo_setup_10(struct elo *elo)
264{
265 static const char *elo_types[] = { "Accu", "Dura", "Intelli", "Carroll" };
266 struct input_dev *dev = elo->dev;
267 unsigned char packet[ELO10_PACKET_LEN] = { ELO10_ID_CMD };
268
269 if (elo_command_10(elo, packet))
270 return -1;
271
272 dev->id.version = (packet[5] << 8) | packet[4];
273
274 input_set_abs_params(dev, ABS_X, 96, 4000, 0, 0);
275 input_set_abs_params(dev, ABS_Y, 96, 4000, 0, 0);
276 if (packet[3] & ELO10_PRESSURE)
277 input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
278
279 dev_info(&elo->serio->dev,
280 "%sTouch touchscreen, fw: %02x.%02x, features: 0x%02x, controller: 0x%02x\n",
281 elo_types[(packet[1] -'0') & 0x03],
282 packet[5], packet[4], packet[3], packet[7]);
283
284 return 0;
285}
286
287/*
288 * elo_disconnect() is the opposite of elo_connect()
289 */
290
291static void elo_disconnect(struct serio *serio)
292{
293 struct elo *elo = serio_get_drvdata(serio);
294
295 input_get_device(elo->dev);
296 input_unregister_device(elo->dev);
297 serio_close(serio);
298 serio_set_drvdata(serio, NULL);
299 input_put_device(elo->dev);
300 kfree(elo);
301}
302
303/*
304 * elo_connect() is the routine that is called when someone adds a
305 * new serio device that supports Gunze protocol and registers it as
306 * an input device.
307 */
308
309static int elo_connect(struct serio *serio, struct serio_driver *drv)
310{
311 struct elo *elo;
312 struct input_dev *input_dev;
313 int err;
314
315 elo = kzalloc(sizeof(struct elo), GFP_KERNEL);
316 input_dev = input_allocate_device();
317 if (!elo || !input_dev) {
318 err = -ENOMEM;
319 goto fail1;
320 }
321
322 elo->serio = serio;
323 elo->id = serio->id.id;
324 elo->dev = input_dev;
325 elo->expected_packet = ELO10_TOUCH_PACKET;
326 mutex_init(&elo->cmd_mutex);
327 init_completion(&elo->cmd_done);
328 snprintf(elo->phys, sizeof(elo->phys), "%s/input0", serio->phys);
329
330 input_dev->name = "Elo Serial TouchScreen";
331 input_dev->phys = elo->phys;
332 input_dev->id.bustype = BUS_RS232;
333 input_dev->id.vendor = SERIO_ELO;
334 input_dev->id.product = elo->id;
335 input_dev->id.version = 0x0100;
336 input_dev->dev.parent = &serio->dev;
337
338 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
339 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
340
341 serio_set_drvdata(serio, elo);
342 err = serio_open(serio, drv);
343 if (err)
344 goto fail2;
345
346 switch (elo->id) {
347
348 case 0: /* 10-byte protocol */
349 if (elo_setup_10(elo))
350 goto fail3;
351
352 break;
353
354 case 1: /* 6-byte protocol */
355 input_set_abs_params(input_dev, ABS_PRESSURE, 0, 15, 0, 0);
356
357 case 2: /* 4-byte protocol */
358 input_set_abs_params(input_dev, ABS_X, 96, 4000, 0, 0);
359 input_set_abs_params(input_dev, ABS_Y, 96, 4000, 0, 0);
360 break;
361
362 case 3: /* 3-byte protocol */
363 input_set_abs_params(input_dev, ABS_X, 0, 255, 0, 0);
364 input_set_abs_params(input_dev, ABS_Y, 0, 255, 0, 0);
365 break;
366 }
367
368 err = input_register_device(elo->dev);
369 if (err)
370 goto fail3;
371
372 return 0;
373
374 fail3: serio_close(serio);
375 fail2: serio_set_drvdata(serio, NULL);
376 fail1: input_free_device(input_dev);
377 kfree(elo);
378 return err;
379}
380
381/*
382 * The serio driver structure.
383 */
384
385static struct serio_device_id elo_serio_ids[] = {
386 {
387 .type = SERIO_RS232,
388 .proto = SERIO_ELO,
389 .id = SERIO_ANY,
390 .extra = SERIO_ANY,
391 },
392 { 0 }
393};
394
395MODULE_DEVICE_TABLE(serio, elo_serio_ids);
396
397static struct serio_driver elo_drv = {
398 .driver = {
399 .name = "elo",
400 },
401 .description = DRIVER_DESC,
402 .id_table = elo_serio_ids,
403 .interrupt = elo_interrupt,
404 .connect = elo_connect,
405 .disconnect = elo_disconnect,
406};
407
408/*
409 * The functions for inserting/removing us as a module.
410 */
411
412static int __init elo_init(void)
413{
414 return serio_register_driver(&elo_drv);
415}
416
417static void __exit elo_exit(void)
418{
419 serio_unregister_driver(&elo_drv);
420}
421
422module_init(elo_init);
423module_exit(elo_exit);
1/*
2 * Elo serial touchscreen driver
3 *
4 * Copyright (c) 2004 Vojtech Pavlik
5 */
6
7/*
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 as published by
10 * the Free Software Foundation.
11 */
12
13/*
14 * This driver can handle serial Elo touchscreens using either the Elo standard
15 * 'E271-2210' 10-byte protocol, Elo legacy 'E281A-4002' 6-byte protocol, Elo
16 * legacy 'E271-140' 4-byte protocol and Elo legacy 'E261-280' 3-byte protocol.
17 */
18
19#include <linux/errno.h>
20#include <linux/kernel.h>
21#include <linux/module.h>
22#include <linux/slab.h>
23#include <linux/input.h>
24#include <linux/serio.h>
25#include <linux/ctype.h>
26
27#define DRIVER_DESC "Elo serial touchscreen driver"
28
29MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
30MODULE_DESCRIPTION(DRIVER_DESC);
31MODULE_LICENSE("GPL");
32
33/*
34 * Definitions & global arrays.
35 */
36
37#define ELO_MAX_LENGTH 10
38
39#define ELO10_PACKET_LEN 8
40#define ELO10_TOUCH 0x03
41#define ELO10_PRESSURE 0x80
42
43#define ELO10_LEAD_BYTE 'U'
44
45#define ELO10_ID_CMD 'i'
46
47#define ELO10_TOUCH_PACKET 'T'
48#define ELO10_ACK_PACKET 'A'
49#define ELI10_ID_PACKET 'I'
50
51/*
52 * Per-touchscreen data.
53 */
54
55struct elo {
56 struct input_dev *dev;
57 struct serio *serio;
58 struct mutex cmd_mutex;
59 struct completion cmd_done;
60 int id;
61 int idx;
62 unsigned char expected_packet;
63 unsigned char csum;
64 unsigned char data[ELO_MAX_LENGTH];
65 unsigned char response[ELO10_PACKET_LEN];
66 char phys[32];
67};
68
69static void elo_process_data_10(struct elo *elo, unsigned char data)
70{
71 struct input_dev *dev = elo->dev;
72
73 elo->data[elo->idx] = data;
74
75 switch (elo->idx++) {
76 case 0:
77 elo->csum = 0xaa;
78 if (data != ELO10_LEAD_BYTE) {
79 dev_dbg(&elo->serio->dev,
80 "unsynchronized data: 0x%02x\n", data);
81 elo->idx = 0;
82 }
83 break;
84
85 case 9:
86 elo->idx = 0;
87 if (data != elo->csum) {
88 dev_dbg(&elo->serio->dev,
89 "bad checksum: 0x%02x, expected 0x%02x\n",
90 data, elo->csum);
91 break;
92 }
93 if (elo->data[1] != elo->expected_packet) {
94 if (elo->data[1] != ELO10_TOUCH_PACKET)
95 dev_dbg(&elo->serio->dev,
96 "unexpected packet: 0x%02x\n",
97 elo->data[1]);
98 break;
99 }
100 if (likely(elo->data[1] == ELO10_TOUCH_PACKET)) {
101 input_report_abs(dev, ABS_X, (elo->data[4] << 8) | elo->data[3]);
102 input_report_abs(dev, ABS_Y, (elo->data[6] << 8) | elo->data[5]);
103 if (elo->data[2] & ELO10_PRESSURE)
104 input_report_abs(dev, ABS_PRESSURE,
105 (elo->data[8] << 8) | elo->data[7]);
106 input_report_key(dev, BTN_TOUCH, elo->data[2] & ELO10_TOUCH);
107 input_sync(dev);
108 } else if (elo->data[1] == ELO10_ACK_PACKET) {
109 if (elo->data[2] == '0')
110 elo->expected_packet = ELO10_TOUCH_PACKET;
111 complete(&elo->cmd_done);
112 } else {
113 memcpy(elo->response, &elo->data[1], ELO10_PACKET_LEN);
114 elo->expected_packet = ELO10_ACK_PACKET;
115 }
116 break;
117 }
118 elo->csum += data;
119}
120
121static void elo_process_data_6(struct elo *elo, unsigned char data)
122{
123 struct input_dev *dev = elo->dev;
124
125 elo->data[elo->idx] = data;
126
127 switch (elo->idx++) {
128
129 case 0:
130 if ((data & 0xc0) != 0xc0)
131 elo->idx = 0;
132 break;
133
134 case 1:
135 if ((data & 0xc0) != 0x80)
136 elo->idx = 0;
137 break;
138
139 case 2:
140 if ((data & 0xc0) != 0x40)
141 elo->idx = 0;
142 break;
143
144 case 3:
145 if (data & 0xc0) {
146 elo->idx = 0;
147 break;
148 }
149
150 input_report_abs(dev, ABS_X, ((elo->data[0] & 0x3f) << 6) | (elo->data[1] & 0x3f));
151 input_report_abs(dev, ABS_Y, ((elo->data[2] & 0x3f) << 6) | (elo->data[3] & 0x3f));
152
153 if (elo->id == 2) {
154 input_report_key(dev, BTN_TOUCH, 1);
155 input_sync(dev);
156 elo->idx = 0;
157 }
158
159 break;
160
161 case 4:
162 if (data) {
163 input_sync(dev);
164 elo->idx = 0;
165 }
166 break;
167
168 case 5:
169 if ((data & 0xf0) == 0) {
170 input_report_abs(dev, ABS_PRESSURE, elo->data[5]);
171 input_report_key(dev, BTN_TOUCH, !!elo->data[5]);
172 }
173 input_sync(dev);
174 elo->idx = 0;
175 break;
176 }
177}
178
179static void elo_process_data_3(struct elo *elo, unsigned char data)
180{
181 struct input_dev *dev = elo->dev;
182
183 elo->data[elo->idx] = data;
184
185 switch (elo->idx++) {
186
187 case 0:
188 if ((data & 0x7f) != 0x01)
189 elo->idx = 0;
190 break;
191 case 2:
192 input_report_key(dev, BTN_TOUCH, !(elo->data[1] & 0x80));
193 input_report_abs(dev, ABS_X, elo->data[1]);
194 input_report_abs(dev, ABS_Y, elo->data[2]);
195 input_sync(dev);
196 elo->idx = 0;
197 break;
198 }
199}
200
201static irqreturn_t elo_interrupt(struct serio *serio,
202 unsigned char data, unsigned int flags)
203{
204 struct elo *elo = serio_get_drvdata(serio);
205
206 switch (elo->id) {
207 case 0:
208 elo_process_data_10(elo, data);
209 break;
210
211 case 1:
212 case 2:
213 elo_process_data_6(elo, data);
214 break;
215
216 case 3:
217 elo_process_data_3(elo, data);
218 break;
219 }
220
221 return IRQ_HANDLED;
222}
223
224static int elo_command_10(struct elo *elo, unsigned char *packet)
225{
226 int rc = -1;
227 int i;
228 unsigned char csum = 0xaa + ELO10_LEAD_BYTE;
229
230 mutex_lock(&elo->cmd_mutex);
231
232 serio_pause_rx(elo->serio);
233 elo->expected_packet = toupper(packet[0]);
234 init_completion(&elo->cmd_done);
235 serio_continue_rx(elo->serio);
236
237 if (serio_write(elo->serio, ELO10_LEAD_BYTE))
238 goto out;
239
240 for (i = 0; i < ELO10_PACKET_LEN; i++) {
241 csum += packet[i];
242 if (serio_write(elo->serio, packet[i]))
243 goto out;
244 }
245
246 if (serio_write(elo->serio, csum))
247 goto out;
248
249 wait_for_completion_timeout(&elo->cmd_done, HZ);
250
251 if (elo->expected_packet == ELO10_TOUCH_PACKET) {
252 /* We are back in reporting mode, the command was ACKed */
253 memcpy(packet, elo->response, ELO10_PACKET_LEN);
254 rc = 0;
255 }
256
257 out:
258 mutex_unlock(&elo->cmd_mutex);
259 return rc;
260}
261
262static int elo_setup_10(struct elo *elo)
263{
264 static const char *elo_types[] = { "Accu", "Dura", "Intelli", "Carroll" };
265 struct input_dev *dev = elo->dev;
266 unsigned char packet[ELO10_PACKET_LEN] = { ELO10_ID_CMD };
267
268 if (elo_command_10(elo, packet))
269 return -1;
270
271 dev->id.version = (packet[5] << 8) | packet[4];
272
273 input_set_abs_params(dev, ABS_X, 96, 4000, 0, 0);
274 input_set_abs_params(dev, ABS_Y, 96, 4000, 0, 0);
275 if (packet[3] & ELO10_PRESSURE)
276 input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
277
278 dev_info(&elo->serio->dev,
279 "%sTouch touchscreen, fw: %02x.%02x, features: 0x%02x, controller: 0x%02x\n",
280 elo_types[(packet[1] -'0') & 0x03],
281 packet[5], packet[4], packet[3], packet[7]);
282
283 return 0;
284}
285
286/*
287 * elo_disconnect() is the opposite of elo_connect()
288 */
289
290static void elo_disconnect(struct serio *serio)
291{
292 struct elo *elo = serio_get_drvdata(serio);
293
294 input_get_device(elo->dev);
295 input_unregister_device(elo->dev);
296 serio_close(serio);
297 serio_set_drvdata(serio, NULL);
298 input_put_device(elo->dev);
299 kfree(elo);
300}
301
302/*
303 * elo_connect() is the routine that is called when someone adds a
304 * new serio device that supports Gunze protocol and registers it as
305 * an input device.
306 */
307
308static int elo_connect(struct serio *serio, struct serio_driver *drv)
309{
310 struct elo *elo;
311 struct input_dev *input_dev;
312 int err;
313
314 elo = kzalloc(sizeof(struct elo), GFP_KERNEL);
315 input_dev = input_allocate_device();
316 if (!elo || !input_dev) {
317 err = -ENOMEM;
318 goto fail1;
319 }
320
321 elo->serio = serio;
322 elo->id = serio->id.id;
323 elo->dev = input_dev;
324 elo->expected_packet = ELO10_TOUCH_PACKET;
325 mutex_init(&elo->cmd_mutex);
326 init_completion(&elo->cmd_done);
327 snprintf(elo->phys, sizeof(elo->phys), "%s/input0", serio->phys);
328
329 input_dev->name = "Elo Serial TouchScreen";
330 input_dev->phys = elo->phys;
331 input_dev->id.bustype = BUS_RS232;
332 input_dev->id.vendor = SERIO_ELO;
333 input_dev->id.product = elo->id;
334 input_dev->id.version = 0x0100;
335 input_dev->dev.parent = &serio->dev;
336
337 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
338 input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
339
340 serio_set_drvdata(serio, elo);
341 err = serio_open(serio, drv);
342 if (err)
343 goto fail2;
344
345 switch (elo->id) {
346
347 case 0: /* 10-byte protocol */
348 if (elo_setup_10(elo))
349 goto fail3;
350
351 break;
352
353 case 1: /* 6-byte protocol */
354 input_set_abs_params(input_dev, ABS_PRESSURE, 0, 15, 0, 0);
355
356 case 2: /* 4-byte protocol */
357 input_set_abs_params(input_dev, ABS_X, 96, 4000, 0, 0);
358 input_set_abs_params(input_dev, ABS_Y, 96, 4000, 0, 0);
359 break;
360
361 case 3: /* 3-byte protocol */
362 input_set_abs_params(input_dev, ABS_X, 0, 255, 0, 0);
363 input_set_abs_params(input_dev, ABS_Y, 0, 255, 0, 0);
364 break;
365 }
366
367 err = input_register_device(elo->dev);
368 if (err)
369 goto fail3;
370
371 return 0;
372
373 fail3: serio_close(serio);
374 fail2: serio_set_drvdata(serio, NULL);
375 fail1: input_free_device(input_dev);
376 kfree(elo);
377 return err;
378}
379
380/*
381 * The serio driver structure.
382 */
383
384static struct serio_device_id elo_serio_ids[] = {
385 {
386 .type = SERIO_RS232,
387 .proto = SERIO_ELO,
388 .id = SERIO_ANY,
389 .extra = SERIO_ANY,
390 },
391 { 0 }
392};
393
394MODULE_DEVICE_TABLE(serio, elo_serio_ids);
395
396static struct serio_driver elo_drv = {
397 .driver = {
398 .name = "elo",
399 },
400 .description = DRIVER_DESC,
401 .id_table = elo_serio_ids,
402 .interrupt = elo_interrupt,
403 .connect = elo_connect,
404 .disconnect = elo_disconnect,
405};
406
407module_serio_driver(elo_drv);