1// SPDX-License-Identifier: GPL-2.0-only
2/* Common methods for dibusb-based-receivers.
3 *
4 * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@posteo.de)
5 *
6 * see Documentation/driver-api/media/drivers/dvb-usb.rst for more information
7 */
8
9#include "dibusb.h"
10
11/* Max transfer size done by I2C transfer functions */
12#define MAX_XFER_SIZE  64
13
14static int debug;
15module_param(debug, int, 0644);
16MODULE_PARM_DESC(debug, "set debugging level (1=info (|-able))." DVB_USB_DEBUG_STATUS);
17MODULE_LICENSE("GPL");
18
19#define deb_info(args...) dprintk(debug,0x01,args)
20
21/* common stuff used by the different dibusb modules */
22int dibusb_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
23{
24	if (adap->priv != NULL) {
25		struct dibusb_state *st = adap->priv;
26		if (st->ops.fifo_ctrl != NULL)
27			if (st->ops.fifo_ctrl(adap->fe_adap[0].fe, onoff)) {
28				err("error while controlling the fifo of the demod.");
29				return -ENODEV;
30			}
31	}
32	return 0;
33}
34EXPORT_SYMBOL(dibusb_streaming_ctrl);
35
36int dibusb_pid_filter(struct dvb_usb_adapter *adap, int index, u16 pid, int onoff)
37{
38	if (adap->priv != NULL) {
39		struct dibusb_state *st = adap->priv;
40		if (st->ops.pid_ctrl != NULL)
41			st->ops.pid_ctrl(adap->fe_adap[0].fe,
42					 index, pid, onoff);
43	}
44	return 0;
45}
46EXPORT_SYMBOL(dibusb_pid_filter);
47
48int dibusb_pid_filter_ctrl(struct dvb_usb_adapter *adap, int onoff)
49{
50	if (adap->priv != NULL) {
51		struct dibusb_state *st = adap->priv;
52		if (st->ops.pid_parse != NULL)
53			if (st->ops.pid_parse(adap->fe_adap[0].fe, onoff) < 0)
54				err("could not handle pid_parser");
55	}
56	return 0;
57}
58EXPORT_SYMBOL(dibusb_pid_filter_ctrl);
59
60int dibusb_power_ctrl(struct dvb_usb_device *d, int onoff)
61{
62	u8 *b;
63	int ret;
64
65	b = kmalloc(3, GFP_KERNEL);
66	if (!b)
67		return -ENOMEM;
68
69	b[0] = DIBUSB_REQ_SET_IOCTL;
70	b[1] = DIBUSB_IOCTL_CMD_POWER_MODE;
71	b[2] = onoff ? DIBUSB_IOCTL_POWER_WAKEUP : DIBUSB_IOCTL_POWER_SLEEP;
72
73	ret = dvb_usb_generic_write(d, b, 3);
74
75	kfree(b);
76
77	msleep(10);
78
79	return ret;
80}
81EXPORT_SYMBOL(dibusb_power_ctrl);
82
83int dibusb2_0_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
84{
85	int ret;
86	u8 *b;
87
88	b = kmalloc(3, GFP_KERNEL);
89	if (!b)
90		return -ENOMEM;
91
92	if ((ret = dibusb_streaming_ctrl(adap,onoff)) < 0)
93		goto ret;
94
95	if (onoff) {
96		b[0] = DIBUSB_REQ_SET_STREAMING_MODE;
97		b[1] = 0x00;
98		ret = dvb_usb_generic_write(adap->dev, b, 2);
99		if (ret  < 0)
100			goto ret;
101	}
102
103	b[0] = DIBUSB_REQ_SET_IOCTL;
104	b[1] = onoff ? DIBUSB_IOCTL_CMD_ENABLE_STREAM : DIBUSB_IOCTL_CMD_DISABLE_STREAM;
105	ret = dvb_usb_generic_write(adap->dev, b, 3);
106
107ret:
108	kfree(b);
109	return ret;
110}
111EXPORT_SYMBOL(dibusb2_0_streaming_ctrl);
112
113int dibusb2_0_power_ctrl(struct dvb_usb_device *d, int onoff)
114{
115	u8 *b;
116	int ret;
117
118	if (!onoff)
119		return 0;
120
121	b = kmalloc(3, GFP_KERNEL);
122	if (!b)
123		return -ENOMEM;
124
125	b[0] = DIBUSB_REQ_SET_IOCTL;
126	b[1] = DIBUSB_IOCTL_CMD_POWER_MODE;
127	b[2] = DIBUSB_IOCTL_POWER_WAKEUP;
128
129	ret = dvb_usb_generic_write(d, b, 3);
130
131	kfree(b);
132
133	return ret;
134}
135EXPORT_SYMBOL(dibusb2_0_power_ctrl);
136
137static int dibusb_i2c_msg(struct dvb_usb_device *d, u8 addr,
138			  u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
139{
140	u8 *sndbuf;
141	int ret, wo, len;
142
143	/* write only ? */
144	wo = (rbuf == NULL || rlen == 0);
145
146	len = 2 + wlen + (wo ? 0 : 2);
147
148	sndbuf = kmalloc(MAX_XFER_SIZE, GFP_KERNEL);
149	if (!sndbuf)
150		return -ENOMEM;
151
152	if (4 + wlen > MAX_XFER_SIZE) {
153		warn("i2c wr: len=%d is too big!\n", wlen);
154		ret = -EOPNOTSUPP;
155		goto ret;
156	}
157
158	sndbuf[0] = wo ? DIBUSB_REQ_I2C_WRITE : DIBUSB_REQ_I2C_READ;
159	sndbuf[1] = (addr << 1) | (wo ? 0 : 1);
160
161	memcpy(&sndbuf[2], wbuf, wlen);
162
163	if (!wo) {
164		sndbuf[wlen + 2] = (rlen >> 8) & 0xff;
165		sndbuf[wlen + 3] = rlen & 0xff;
166	}
167
168	ret = dvb_usb_generic_rw(d, sndbuf, len, rbuf, rlen, 0);
169
170ret:
171	kfree(sndbuf);
172	return ret;
173}
174
175/*
176 * I2C master xfer function
177 */
178static int dibusb_i2c_xfer(struct i2c_adapter *adap,struct i2c_msg msg[],int num)
179{
180	struct dvb_usb_device *d = i2c_get_adapdata(adap);
181	int i;
182
183	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
184		return -EAGAIN;
185
186	for (i = 0; i < num; i++) {
187		/* write/read request */
188		if (i+1 < num && (msg[i].flags & I2C_M_RD) == 0
189					  && (msg[i+1].flags & I2C_M_RD)) {
190			if (dibusb_i2c_msg(d, msg[i].addr, msg[i].buf,msg[i].len,
191						msg[i+1].buf,msg[i+1].len) < 0)
192				break;
193			i++;
194		} else if ((msg[i].flags & I2C_M_RD) == 0) {
195			if (dibusb_i2c_msg(d, msg[i].addr, msg[i].buf,msg[i].len,NULL,0) < 0)
196				break;
197		} else if (msg[i].addr != 0x50) {
198			/* 0x50 is the address of the eeprom - we need to protect it
199			 * from dibusb's bad i2c implementation: reads without
200			 * writing the offset before are forbidden */
201			if (dibusb_i2c_msg(d, msg[i].addr, NULL, 0, msg[i].buf, msg[i].len) < 0)
202				break;
203		}
204	}
205
206	mutex_unlock(&d->i2c_mutex);
207	return i;
208}
209
210static u32 dibusb_i2c_func(struct i2c_adapter *adapter)
211{
212	return I2C_FUNC_I2C;
213}
214
215struct i2c_algorithm dibusb_i2c_algo = {
216	.master_xfer   = dibusb_i2c_xfer,
217	.functionality = dibusb_i2c_func,
218};
219EXPORT_SYMBOL(dibusb_i2c_algo);
220
221int dibusb_read_eeprom_byte(struct dvb_usb_device *d, u8 offs, u8 *val)
222{
223	u8 *buf;
224	int rc;
225
226	buf = kzalloc(2, GFP_KERNEL);
227	if (!buf)
228		return -ENOMEM;
229
230	buf[0] = offs;
231
232	rc = dibusb_i2c_msg(d, 0x50, &buf[0], 1, &buf[1], 1);
233	*val = buf[1];
234	kfree(buf);
235
236	return rc;
237}
238EXPORT_SYMBOL(dibusb_read_eeprom_byte);
239
240/*
241 * common remote control stuff
242 */
243struct rc_map_table rc_map_dibusb_table[] = {
244	/* Key codes for the little Artec T1/Twinhan/HAMA/ remote. */
245	{ 0x0016, KEY_POWER },
246	{ 0x0010, KEY_MUTE },
247	{ 0x0003, KEY_1 },
248	{ 0x0001, KEY_2 },
249	{ 0x0006, KEY_3 },
250	{ 0x0009, KEY_4 },
251	{ 0x001d, KEY_5 },
252	{ 0x001f, KEY_6 },
253	{ 0x000d, KEY_7 },
254	{ 0x0019, KEY_8 },
255	{ 0x001b, KEY_9 },
256	{ 0x0015, KEY_0 },
257	{ 0x0005, KEY_CHANNELUP },
258	{ 0x0002, KEY_CHANNELDOWN },
259	{ 0x001e, KEY_VOLUMEUP },
260	{ 0x000a, KEY_VOLUMEDOWN },
261	{ 0x0011, KEY_RECORD },
262	{ 0x0017, KEY_FAVORITES }, /* Heart symbol - Channel list. */
263	{ 0x0014, KEY_PLAY },
264	{ 0x001a, KEY_STOP },
265	{ 0x0040, KEY_REWIND },
266	{ 0x0012, KEY_FASTFORWARD },
267	{ 0x000e, KEY_PREVIOUS }, /* Recall - Previous channel. */
268	{ 0x004c, KEY_PAUSE },
269	{ 0x004d, KEY_SCREEN }, /* Full screen mode. */
270	{ 0x0054, KEY_AUDIO }, /* MTS - Switch to secondary audio. */
271	/* additional keys TwinHan VisionPlus, the Artec seemingly not have */
272	{ 0x000c, KEY_CANCEL }, /* Cancel */
273	{ 0x001c, KEY_EPG }, /* EPG */
274	{ 0x0000, KEY_TAB }, /* Tab */
275	{ 0x0048, KEY_INFO }, /* Preview */
276	{ 0x0004, KEY_LIST }, /* RecordList */
277	{ 0x000f, KEY_TEXT }, /* Teletext */
278	/* Key codes for the KWorld/ADSTech/JetWay remote. */
279	{ 0x8612, KEY_POWER },
280	{ 0x860f, KEY_SELECT }, /* source */
281	{ 0x860c, KEY_UNKNOWN }, /* scan */
282	{ 0x860b, KEY_EPG },
283	{ 0x8610, KEY_MUTE },
284	{ 0x8601, KEY_1 },
285	{ 0x8602, KEY_2 },
286	{ 0x8603, KEY_3 },
287	{ 0x8604, KEY_4 },
288	{ 0x8605, KEY_5 },
289	{ 0x8606, KEY_6 },
290	{ 0x8607, KEY_7 },
291	{ 0x8608, KEY_8 },
292	{ 0x8609, KEY_9 },
293	{ 0x860a, KEY_0 },
294	{ 0x8618, KEY_ZOOM },
295	{ 0x861c, KEY_UNKNOWN }, /* preview */
296	{ 0x8613, KEY_UNKNOWN }, /* snap */
297	{ 0x8600, KEY_UNDO },
298	{ 0x861d, KEY_RECORD },
299	{ 0x860d, KEY_STOP },
300	{ 0x860e, KEY_PAUSE },
301	{ 0x8616, KEY_PLAY },
302	{ 0x8611, KEY_BACK },
303	{ 0x8619, KEY_FORWARD },
304	{ 0x8614, KEY_UNKNOWN }, /* pip */
305	{ 0x8615, KEY_ESC },
306	{ 0x861a, KEY_UP },
307	{ 0x861e, KEY_DOWN },
308	{ 0x861f, KEY_LEFT },
309	{ 0x861b, KEY_RIGHT },
310
311	/* Key codes for the DiBcom MOD3000 remote. */
312	{ 0x8000, KEY_MUTE },
313	{ 0x8001, KEY_TEXT },
314	{ 0x8002, KEY_HOME },
315	{ 0x8003, KEY_POWER },
316
317	{ 0x8004, KEY_RED },
318	{ 0x8005, KEY_GREEN },
319	{ 0x8006, KEY_YELLOW },
320	{ 0x8007, KEY_BLUE },
321
322	{ 0x8008, KEY_DVD },
323	{ 0x8009, KEY_AUDIO },
324	{ 0x800a, KEY_IMAGES },      /* Pictures */
325	{ 0x800b, KEY_VIDEO },
326
327	{ 0x800c, KEY_BACK },
328	{ 0x800d, KEY_UP },
329	{ 0x800e, KEY_RADIO },
330	{ 0x800f, KEY_EPG },
331
332	{ 0x8010, KEY_LEFT },
333	{ 0x8011, KEY_OK },
334	{ 0x8012, KEY_RIGHT },
335	{ 0x8013, KEY_UNKNOWN },    /* SAP */
336
337	{ 0x8014, KEY_TV },
338	{ 0x8015, KEY_DOWN },
339	{ 0x8016, KEY_MENU },       /* DVD Menu */
340	{ 0x8017, KEY_LAST },
341
342	{ 0x8018, KEY_RECORD },
343	{ 0x8019, KEY_STOP },
344	{ 0x801a, KEY_PAUSE },
345	{ 0x801b, KEY_PLAY },
346
347	{ 0x801c, KEY_PREVIOUS },
348	{ 0x801d, KEY_REWIND },
349	{ 0x801e, KEY_FASTFORWARD },
350	{ 0x801f, KEY_NEXT},
351
352	{ 0x8040, KEY_1 },
353	{ 0x8041, KEY_2 },
354	{ 0x8042, KEY_3 },
355	{ 0x8043, KEY_CHANNELUP },
356
357	{ 0x8044, KEY_4 },
358	{ 0x8045, KEY_5 },
359	{ 0x8046, KEY_6 },
360	{ 0x8047, KEY_CHANNELDOWN },
361
362	{ 0x8048, KEY_7 },
363	{ 0x8049, KEY_8 },
364	{ 0x804a, KEY_9 },
365	{ 0x804b, KEY_VOLUMEUP },
366
367	{ 0x804c, KEY_CLEAR },
368	{ 0x804d, KEY_0 },
369	{ 0x804e, KEY_ENTER },
370	{ 0x804f, KEY_VOLUMEDOWN },
371};
372EXPORT_SYMBOL(rc_map_dibusb_table);
373
374int dibusb_rc_query(struct dvb_usb_device *d, u32 *event, int *state)
375{
376	u8 *buf;
377	int ret;
378
379	buf = kmalloc(5, GFP_KERNEL);
380	if (!buf)
381		return -ENOMEM;
382
383	buf[0] = DIBUSB_REQ_POLL_REMOTE;
384
385	ret = dvb_usb_generic_rw(d, buf, 1, buf, 5, 0);
386	if (ret < 0)
387		goto ret;
388
389	dvb_usb_nec_rc_key_to_event(d, buf, event, state);
390
391	if (buf[0] != 0)
392		deb_info("key: %*ph\n", 5, buf);
393
394ret:
395	kfree(buf);
396
397	return ret;
398}
399EXPORT_SYMBOL(dibusb_rc_query);
400