xref: /openbmc/linux/drivers/media/usb/dvb-usb/digitv.c (revision 56b77ba1) 
1 // SPDX-License-Identifier: GPL-2.0-only
2 /* DVB USB compliant linux driver for Nebula Electronics uDigiTV DVB-T USB2.0
3  * receiver
4  *
5  * Copyright (C) 2005 Patrick Boettcher (patrick.boettcher@posteo.de)
6  *
7  * partly based on the SDK published by Nebula Electronics
8  *
9  * see Documentation/driver-api/media/drivers/dvb-usb.rst for more information
10  */
11 #include "digitv.h"
12 
13 #include "mt352.h"
14 #include "nxt6000.h"
15 
16 /* debug */
17 static int dvb_usb_digitv_debug;
18 module_param_named(debug,dvb_usb_digitv_debug, int, 0644);
19 MODULE_PARM_DESC(debug, "set debugging level (1=rc (or-able))." DVB_USB_DEBUG_STATUS);
20 
21 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
22 
23 #define deb_rc(args...)   dprintk(dvb_usb_digitv_debug,0x01,args)
24 
25 static int digitv_ctrl_msg(struct dvb_usb_device *d,
26 		u8 cmd, u8 vv, u8 *wbuf, int wlen, u8 *rbuf, int rlen)
27 {
28 	struct digitv_state *st = d->priv;
29 	int ret, wo;
30 
31 	wo = (rbuf == NULL || rlen == 0); /* write-only */
32 
33 	if (wlen > 4 || rlen > 4)
34 		return -EIO;
35 
36 	memset(st->sndbuf, 0, 7);
37 	memset(st->rcvbuf, 0, 7);
38 
39 	st->sndbuf[0] = cmd;
40 	st->sndbuf[1] = vv;
41 	st->sndbuf[2] = wo ? wlen : rlen;
42 
43 	if (wo) {
44 		memcpy(&st->sndbuf[3], wbuf, wlen);
45 		ret = dvb_usb_generic_write(d, st->sndbuf, 7);
46 	} else {
47 		ret = dvb_usb_generic_rw(d, st->sndbuf, 7, st->rcvbuf, 7, 10);
48 		memcpy(rbuf, &st->rcvbuf[3], rlen);
49 	}
50 	return ret;
51 }
52 
53 /* I2C */
54 static int digitv_i2c_xfer(struct i2c_adapter *adap,struct i2c_msg msg[],int num)
55 {
56 	struct dvb_usb_device *d = i2c_get_adapdata(adap);
57 	int i;
58 
59 	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
60 		return -EAGAIN;
61 
62 	if (num > 2)
63 		warn("more than 2 i2c messages at a time is not handled yet. TODO.");
64 
65 	for (i = 0; i < num; i++) {
66 		if (msg[i].len < 1) {
67 			i = -EOPNOTSUPP;
68 			break;
69 		}
70 		/* write/read request */
71 		if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
72 			if (digitv_ctrl_msg(d, USB_READ_COFDM, msg[i].buf[0], NULL, 0,
73 						msg[i+1].buf,msg[i+1].len) < 0)
74 				break;
75 			i++;
76 		} else
77 			if (digitv_ctrl_msg(d,USB_WRITE_COFDM, msg[i].buf[0],
78 						&msg[i].buf[1],msg[i].len-1,NULL,0) < 0)
79 				break;
80 	}
81 
82 	mutex_unlock(&d->i2c_mutex);
83 	return i;
84 }
85 
86 static u32 digitv_i2c_func(struct i2c_adapter *adapter)
87 {
88 	return I2C_FUNC_I2C;
89 }
90 
91 static struct i2c_algorithm digitv_i2c_algo = {
92 	.master_xfer   = digitv_i2c_xfer,
93 	.functionality = digitv_i2c_func,
94 };
95 
96 /* Callbacks for DVB USB */
97 static int digitv_identify_state(struct usb_device *udev,
98 				 const struct dvb_usb_device_properties *props,
99 				 const struct dvb_usb_device_description **desc,
100 				 int *cold)
101 {
102 	*cold = udev->descriptor.iManufacturer == 0 && udev->descriptor.iProduct == 0;
103 	return 0;
104 }
105 
106 static int digitv_mt352_demod_init(struct dvb_frontend *fe)
107 {
108 	static u8 reset_buf[] = { 0x89, 0x38,  0x8a, 0x2d, 0x50, 0x80 };
109 	static u8 init_buf[] = { 0x68, 0xa0,  0x8e, 0x40,  0x53, 0x50,
110 			0x67, 0x20,  0x7d, 0x01,  0x7c, 0x00,  0x7a, 0x00,
111 			0x79, 0x20,  0x57, 0x05,  0x56, 0x31,  0x88, 0x0f,
112 			0x75, 0x32 };
113 	int i;
114 
115 	for (i = 0; i < ARRAY_SIZE(reset_buf); i += 2)
116 		mt352_write(fe, &reset_buf[i], 2);
117 
118 	msleep(1);
119 
120 	for (i = 0; i < ARRAY_SIZE(init_buf); i += 2)
121 		mt352_write(fe, &init_buf[i], 2);
122 
123 	return 0;
124 }
125 
126 static struct mt352_config digitv_mt352_config = {
127 	.demod_init = digitv_mt352_demod_init,
128 };
129 
130 static int digitv_nxt6000_tuner_set_params(struct dvb_frontend *fe)
131 {
132 	struct dvb_usb_adapter *adap = fe->dvb->priv;
133 	u8 b[5];
134 
135 	fe->ops.tuner_ops.calc_regs(fe, b, sizeof(b));
136 	if (fe->ops.i2c_gate_ctrl)
137 		fe->ops.i2c_gate_ctrl(fe, 1);
138 	return digitv_ctrl_msg(adap->dev, USB_WRITE_TUNER, 0, &b[1], 4, NULL, 0);
139 }
140 
141 static struct nxt6000_config digitv_nxt6000_config = {
142 	.clock_inversion = 1,
143 };
144 
145 static int digitv_frontend_attach(struct dvb_usb_adapter *adap)
146 {
147 	struct digitv_state *st = adap->dev->priv;
148 
149 	adap->fe_adap[0].fe = dvb_attach(mt352_attach, &digitv_mt352_config,
150 					 &adap->dev->i2c_adap);
151 	if ((adap->fe_adap[0].fe) != NULL) {
152 		st->is_nxt6000 = 0;
153 		return 0;
154 	}
155 	adap->fe_adap[0].fe = dvb_attach(nxt6000_attach,
156 					 &digitv_nxt6000_config,
157 					 &adap->dev->i2c_adap);
158 	if ((adap->fe_adap[0].fe) != NULL) {
159 		st->is_nxt6000 = 1;
160 		return 0;
161 	}
162 	return -EIO;
163 }
164 
165 static int digitv_tuner_attach(struct dvb_usb_adapter *adap)
166 {
167 	struct digitv_state *st = adap->dev->priv;
168 
169 	if (!dvb_attach(dvb_pll_attach, adap->fe_adap[0].fe, 0x60, NULL, DVB_PLL_TDED4))
170 		return -ENODEV;
171 
172 	if (st->is_nxt6000)
173 		adap->fe_adap[0].fe->ops.tuner_ops.set_params = digitv_nxt6000_tuner_set_params;
174 
175 	return 0;
176 }
177 
178 static struct rc_map_table rc_map_digitv_table[] = {
179 	{ 0x5f55, KEY_0 },
180 	{ 0x6f55, KEY_1 },
181 	{ 0x9f55, KEY_2 },
182 	{ 0xaf55, KEY_3 },
183 	{ 0x5f56, KEY_4 },
184 	{ 0x6f56, KEY_5 },
185 	{ 0x9f56, KEY_6 },
186 	{ 0xaf56, KEY_7 },
187 	{ 0x5f59, KEY_8 },
188 	{ 0x6f59, KEY_9 },
189 	{ 0x9f59, KEY_TV },
190 	{ 0xaf59, KEY_AUX },
191 	{ 0x5f5a, KEY_DVD },
192 	{ 0x6f5a, KEY_POWER },
193 	{ 0x9f5a, KEY_CAMERA },     /* labelled 'Picture' */
194 	{ 0xaf5a, KEY_AUDIO },
195 	{ 0x5f65, KEY_INFO },
196 	{ 0x6f65, KEY_F13 },     /* 16:9 */
197 	{ 0x9f65, KEY_F14 },     /* 14:9 */
198 	{ 0xaf65, KEY_EPG },
199 	{ 0x5f66, KEY_EXIT },
200 	{ 0x6f66, KEY_MENU },
201 	{ 0x9f66, KEY_UP },
202 	{ 0xaf66, KEY_DOWN },
203 	{ 0x5f69, KEY_LEFT },
204 	{ 0x6f69, KEY_RIGHT },
205 	{ 0x9f69, KEY_ENTER },
206 	{ 0xaf69, KEY_CHANNELUP },
207 	{ 0x5f6a, KEY_CHANNELDOWN },
208 	{ 0x6f6a, KEY_VOLUMEUP },
209 	{ 0x9f6a, KEY_VOLUMEDOWN },
210 	{ 0xaf6a, KEY_RED },
211 	{ 0x5f95, KEY_GREEN },
212 	{ 0x6f95, KEY_YELLOW },
213 	{ 0x9f95, KEY_BLUE },
214 	{ 0xaf95, KEY_SUBTITLE },
215 	{ 0x5f96, KEY_F15 },     /* AD */
216 	{ 0x6f96, KEY_TEXT },
217 	{ 0x9f96, KEY_MUTE },
218 	{ 0xaf96, KEY_REWIND },
219 	{ 0x5f99, KEY_STOP },
220 	{ 0x6f99, KEY_PLAY },
221 	{ 0x9f99, KEY_FASTFORWARD },
222 	{ 0xaf99, KEY_F16 },     /* chapter */
223 	{ 0x5f9a, KEY_PAUSE },
224 	{ 0x6f9a, KEY_PLAY },
225 	{ 0x9f9a, KEY_RECORD },
226 	{ 0xaf9a, KEY_F17 },     /* picture in picture */
227 	{ 0x5fa5, KEY_KPPLUS },  /* zoom in */
228 	{ 0x6fa5, KEY_KPMINUS }, /* zoom out */
229 	{ 0x9fa5, KEY_F18 },     /* capture */
230 	{ 0xafa5, KEY_F19 },     /* web */
231 	{ 0x5fa6, KEY_EMAIL },
232 	{ 0x6fa6, KEY_PHONE },
233 	{ 0x9fa6, KEY_PC },
234 };
235 
236 static int digitv_rc_query(struct dvb_usb_device *d, u32 *event, int *state)
237 {
238 	struct rc_map_table *entry;
239 	int ret, i;
240 	u8 key[4];
241 	u8 b[4] = { 0 };
242 
243 	*event = 0;
244 	*state = REMOTE_NO_KEY_PRESSED;
245 
246 	ret = digitv_ctrl_msg(d, USB_READ_REMOTE, 0, NULL, 0, key, 4);
247 	if (ret)
248 		return ret;
249 
250 	/* Tell the device we've read the remote. Not sure how necessary
251 	   this is, but the Nebula SDK does it. */
252 	ret = digitv_ctrl_msg(d, USB_WRITE_REMOTE, 0, b, 4, NULL, 0);
253 	if (ret)
254 		return ret;
255 
256 	/* if something is inside the buffer, simulate key press */
257 	if (key[0] != 0) {
258 		for (i = 0; i < d->props.rc.legacy.rc_map_size; i++) {
259 			entry = &d->props.rc.legacy.rc_map_table[i];
260 
261 			if (rc5_custom(entry) == key[0] &&
262 			    rc5_data(entry) == key[1]) {
263 				*event = entry->keycode;
264 				*state = REMOTE_KEY_PRESSED;
265 				return 0;
266 			}
267 		}
268 
269 		deb_rc("key: %*ph\n", 4, key);
270 	}
271 
272 	return 0;
273 }
274 
275 /* DVB USB Driver stuff */
276 static struct dvb_usb_device_properties digitv_properties;
277 
278 static int digitv_probe(struct usb_interface *intf,
279 		const struct usb_device_id *id)
280 {
281 	struct dvb_usb_device *d;
282 	int ret = dvb_usb_device_init(intf, &digitv_properties, THIS_MODULE, &d,
283 				      adapter_nr);
284 	if (ret == 0) {
285 		u8 b[4] = { 0 };
286 
287 		if (d != NULL) { /* do that only when the firmware is loaded */
288 			b[0] = 1;
289 			digitv_ctrl_msg(d,USB_WRITE_REMOTE_TYPE,0,b,4,NULL,0);
290 
291 			b[0] = 0;
292 			digitv_ctrl_msg(d,USB_WRITE_REMOTE,0,b,4,NULL,0);
293 		}
294 	}
295 	return ret;
296 }
297 
298 enum {
299 	ANCHOR_NEBULA_DIGITV,
300 };
301 
302 static struct usb_device_id digitv_table[] = {
303 	DVB_USB_DEV(ANCHOR, ANCHOR_NEBULA_DIGITV),
304 	{ }
305 };
306 
307 MODULE_DEVICE_TABLE (usb, digitv_table);
308 
309 static struct dvb_usb_device_properties digitv_properties = {
310 	.caps = DVB_USB_IS_AN_I2C_ADAPTER,
311 
312 	.usb_ctrl = CYPRESS_FX2,
313 	.firmware = "dvb-usb-digitv-02.fw",
314 
315 	.size_of_priv = sizeof(struct digitv_state),
316 
317 	.num_adapters = 1,
318 	.adapter = {
319 		{
320 		.num_frontends = 1,
321 		.fe = {{
322 			.frontend_attach  = digitv_frontend_attach,
323 			.tuner_attach     = digitv_tuner_attach,
324 
325 			/* parameter for the MPEG2-data transfer */
326 			.stream = {
327 				.type = USB_BULK,
328 				.count = 7,
329 				.endpoint = 0x02,
330 				.u = {
331 					.bulk = {
332 						.buffersize = 4096,
333 					}
334 				}
335 			},
336 		}},
337 		}
338 	},
339 	.identify_state   = digitv_identify_state,
340 
341 	.rc.legacy = {
342 		.rc_interval      = 1000,
343 		.rc_map_table     = rc_map_digitv_table,
344 		.rc_map_size      = ARRAY_SIZE(rc_map_digitv_table),
345 		.rc_query         = digitv_rc_query,
346 	},
347 
348 	.i2c_algo         = &digitv_i2c_algo,
349 
350 	.generic_bulk_ctrl_endpoint = 0x01,
351 
352 	.num_device_descs = 1,
353 	.devices = {
354 		{   "Nebula Electronics uDigiTV DVB-T USB2.0)",
355 			{ &digitv_table[ANCHOR_NEBULA_DIGITV], NULL },
356 			{ NULL },
357 		},
358 		{ NULL },
359 	}
360 };
361 
362 static struct usb_driver digitv_driver = {
363 	.name		= "dvb_usb_digitv",
364 	.probe		= digitv_probe,
365 	.disconnect = dvb_usb_device_exit,
366 	.id_table	= digitv_table,
367 };
368 
369 module_usb_driver(digitv_driver);
370 
371 MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@posteo.de>");
372 MODULE_DESCRIPTION("Driver for Nebula Electronics uDigiTV DVB-T USB2.0");
373 MODULE_VERSION("1.0-alpha");
374 MODULE_LICENSE("GPL");
375