xref: /openbmc/linux/drivers/media/usb/dvb-usb/digitv.c (revision 4a6a676f) 
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 		/* write/read request */
67 		if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
68 			if (digitv_ctrl_msg(d, USB_READ_COFDM, msg[i].buf[0], NULL, 0,
69 						msg[i+1].buf,msg[i+1].len) < 0)
70 				break;
71 			i++;
72 		} else
73 			if (digitv_ctrl_msg(d,USB_WRITE_COFDM, msg[i].buf[0],
74 						&msg[i].buf[1],msg[i].len-1,NULL,0) < 0)
75 				break;
76 	}
77 
78 	mutex_unlock(&d->i2c_mutex);
79 	return i;
80 }
81 
82 static u32 digitv_i2c_func(struct i2c_adapter *adapter)
83 {
84 	return I2C_FUNC_I2C;
85 }
86 
87 static struct i2c_algorithm digitv_i2c_algo = {
88 	.master_xfer   = digitv_i2c_xfer,
89 	.functionality = digitv_i2c_func,
90 };
91 
92 /* Callbacks for DVB USB */
93 static int digitv_identify_state(struct usb_device *udev,
94 				 const struct dvb_usb_device_properties *props,
95 				 const struct dvb_usb_device_description **desc,
96 				 int *cold)
97 {
98 	*cold = udev->descriptor.iManufacturer == 0 && udev->descriptor.iProduct == 0;
99 	return 0;
100 }
101 
102 static int digitv_mt352_demod_init(struct dvb_frontend *fe)
103 {
104 	static u8 reset_buf[] = { 0x89, 0x38,  0x8a, 0x2d, 0x50, 0x80 };
105 	static u8 init_buf[] = { 0x68, 0xa0,  0x8e, 0x40,  0x53, 0x50,
106 			0x67, 0x20,  0x7d, 0x01,  0x7c, 0x00,  0x7a, 0x00,
107 			0x79, 0x20,  0x57, 0x05,  0x56, 0x31,  0x88, 0x0f,
108 			0x75, 0x32 };
109 	int i;
110 
111 	for (i = 0; i < ARRAY_SIZE(reset_buf); i += 2)
112 		mt352_write(fe, &reset_buf[i], 2);
113 
114 	msleep(1);
115 
116 	for (i = 0; i < ARRAY_SIZE(init_buf); i += 2)
117 		mt352_write(fe, &init_buf[i], 2);
118 
119 	return 0;
120 }
121 
122 static struct mt352_config digitv_mt352_config = {
123 	.demod_init = digitv_mt352_demod_init,
124 };
125 
126 static int digitv_nxt6000_tuner_set_params(struct dvb_frontend *fe)
127 {
128 	struct dvb_usb_adapter *adap = fe->dvb->priv;
129 	u8 b[5];
130 
131 	fe->ops.tuner_ops.calc_regs(fe, b, sizeof(b));
132 	if (fe->ops.i2c_gate_ctrl)
133 		fe->ops.i2c_gate_ctrl(fe, 1);
134 	return digitv_ctrl_msg(adap->dev, USB_WRITE_TUNER, 0, &b[1], 4, NULL, 0);
135 }
136 
137 static struct nxt6000_config digitv_nxt6000_config = {
138 	.clock_inversion = 1,
139 };
140 
141 static int digitv_frontend_attach(struct dvb_usb_adapter *adap)
142 {
143 	struct digitv_state *st = adap->dev->priv;
144 
145 	adap->fe_adap[0].fe = dvb_attach(mt352_attach, &digitv_mt352_config,
146 					 &adap->dev->i2c_adap);
147 	if ((adap->fe_adap[0].fe) != NULL) {
148 		st->is_nxt6000 = 0;
149 		return 0;
150 	}
151 	adap->fe_adap[0].fe = dvb_attach(nxt6000_attach,
152 					 &digitv_nxt6000_config,
153 					 &adap->dev->i2c_adap);
154 	if ((adap->fe_adap[0].fe) != NULL) {
155 		st->is_nxt6000 = 1;
156 		return 0;
157 	}
158 	return -EIO;
159 }
160 
161 static int digitv_tuner_attach(struct dvb_usb_adapter *adap)
162 {
163 	struct digitv_state *st = adap->dev->priv;
164 
165 	if (!dvb_attach(dvb_pll_attach, adap->fe_adap[0].fe, 0x60, NULL, DVB_PLL_TDED4))
166 		return -ENODEV;
167 
168 	if (st->is_nxt6000)
169 		adap->fe_adap[0].fe->ops.tuner_ops.set_params = digitv_nxt6000_tuner_set_params;
170 
171 	return 0;
172 }
173 
174 static struct rc_map_table rc_map_digitv_table[] = {
175 	{ 0x5f55, KEY_0 },
176 	{ 0x6f55, KEY_1 },
177 	{ 0x9f55, KEY_2 },
178 	{ 0xaf55, KEY_3 },
179 	{ 0x5f56, KEY_4 },
180 	{ 0x6f56, KEY_5 },
181 	{ 0x9f56, KEY_6 },
182 	{ 0xaf56, KEY_7 },
183 	{ 0x5f59, KEY_8 },
184 	{ 0x6f59, KEY_9 },
185 	{ 0x9f59, KEY_TV },
186 	{ 0xaf59, KEY_AUX },
187 	{ 0x5f5a, KEY_DVD },
188 	{ 0x6f5a, KEY_POWER },
189 	{ 0x9f5a, KEY_CAMERA },     /* labelled 'Picture' */
190 	{ 0xaf5a, KEY_AUDIO },
191 	{ 0x5f65, KEY_INFO },
192 	{ 0x6f65, KEY_F13 },     /* 16:9 */
193 	{ 0x9f65, KEY_F14 },     /* 14:9 */
194 	{ 0xaf65, KEY_EPG },
195 	{ 0x5f66, KEY_EXIT },
196 	{ 0x6f66, KEY_MENU },
197 	{ 0x9f66, KEY_UP },
198 	{ 0xaf66, KEY_DOWN },
199 	{ 0x5f69, KEY_LEFT },
200 	{ 0x6f69, KEY_RIGHT },
201 	{ 0x9f69, KEY_ENTER },
202 	{ 0xaf69, KEY_CHANNELUP },
203 	{ 0x5f6a, KEY_CHANNELDOWN },
204 	{ 0x6f6a, KEY_VOLUMEUP },
205 	{ 0x9f6a, KEY_VOLUMEDOWN },
206 	{ 0xaf6a, KEY_RED },
207 	{ 0x5f95, KEY_GREEN },
208 	{ 0x6f95, KEY_YELLOW },
209 	{ 0x9f95, KEY_BLUE },
210 	{ 0xaf95, KEY_SUBTITLE },
211 	{ 0x5f96, KEY_F15 },     /* AD */
212 	{ 0x6f96, KEY_TEXT },
213 	{ 0x9f96, KEY_MUTE },
214 	{ 0xaf96, KEY_REWIND },
215 	{ 0x5f99, KEY_STOP },
216 	{ 0x6f99, KEY_PLAY },
217 	{ 0x9f99, KEY_FASTFORWARD },
218 	{ 0xaf99, KEY_F16 },     /* chapter */
219 	{ 0x5f9a, KEY_PAUSE },
220 	{ 0x6f9a, KEY_PLAY },
221 	{ 0x9f9a, KEY_RECORD },
222 	{ 0xaf9a, KEY_F17 },     /* picture in picture */
223 	{ 0x5fa5, KEY_KPPLUS },  /* zoom in */
224 	{ 0x6fa5, KEY_KPMINUS }, /* zoom out */
225 	{ 0x9fa5, KEY_F18 },     /* capture */
226 	{ 0xafa5, KEY_F19 },     /* web */
227 	{ 0x5fa6, KEY_EMAIL },
228 	{ 0x6fa6, KEY_PHONE },
229 	{ 0x9fa6, KEY_PC },
230 };
231 
232 static int digitv_rc_query(struct dvb_usb_device *d, u32 *event, int *state)
233 {
234 	struct rc_map_table *entry;
235 	int ret, i;
236 	u8 key[4];
237 	u8 b[4] = { 0 };
238 
239 	*event = 0;
240 	*state = REMOTE_NO_KEY_PRESSED;
241 
242 	ret = digitv_ctrl_msg(d, USB_READ_REMOTE, 0, NULL, 0, key, 4);
243 	if (ret)
244 		return ret;
245 
246 	/* Tell the device we've read the remote. Not sure how necessary
247 	   this is, but the Nebula SDK does it. */
248 	ret = digitv_ctrl_msg(d, USB_WRITE_REMOTE, 0, b, 4, NULL, 0);
249 	if (ret)
250 		return ret;
251 
252 	/* if something is inside the buffer, simulate key press */
253 	if (key[0] != 0) {
254 		for (i = 0; i < d->props.rc.legacy.rc_map_size; i++) {
255 			entry = &d->props.rc.legacy.rc_map_table[i];
256 
257 			if (rc5_custom(entry) == key[0] &&
258 			    rc5_data(entry) == key[1]) {
259 				*event = entry->keycode;
260 				*state = REMOTE_KEY_PRESSED;
261 				return 0;
262 			}
263 		}
264 
265 		deb_rc("key: %*ph\n", 4, key);
266 	}
267 
268 	return 0;
269 }
270 
271 /* DVB USB Driver stuff */
272 static struct dvb_usb_device_properties digitv_properties;
273 
274 static int digitv_probe(struct usb_interface *intf,
275 		const struct usb_device_id *id)
276 {
277 	struct dvb_usb_device *d;
278 	int ret = dvb_usb_device_init(intf, &digitv_properties, THIS_MODULE, &d,
279 				      adapter_nr);
280 	if (ret == 0) {
281 		u8 b[4] = { 0 };
282 
283 		if (d != NULL) { /* do that only when the firmware is loaded */
284 			b[0] = 1;
285 			digitv_ctrl_msg(d,USB_WRITE_REMOTE_TYPE,0,b,4,NULL,0);
286 
287 			b[0] = 0;
288 			digitv_ctrl_msg(d,USB_WRITE_REMOTE,0,b,4,NULL,0);
289 		}
290 	}
291 	return ret;
292 }
293 
294 enum {
295 	ANCHOR_NEBULA_DIGITV,
296 };
297 
298 static struct usb_device_id digitv_table[] = {
299 	DVB_USB_DEV(ANCHOR, ANCHOR_NEBULA_DIGITV),
300 	{ }
301 };
302 
303 MODULE_DEVICE_TABLE (usb, digitv_table);
304 
305 static struct dvb_usb_device_properties digitv_properties = {
306 	.caps = DVB_USB_IS_AN_I2C_ADAPTER,
307 
308 	.usb_ctrl = CYPRESS_FX2,
309 	.firmware = "dvb-usb-digitv-02.fw",
310 
311 	.size_of_priv = sizeof(struct digitv_state),
312 
313 	.num_adapters = 1,
314 	.adapter = {
315 		{
316 		.num_frontends = 1,
317 		.fe = {{
318 			.frontend_attach  = digitv_frontend_attach,
319 			.tuner_attach     = digitv_tuner_attach,
320 
321 			/* parameter for the MPEG2-data transfer */
322 			.stream = {
323 				.type = USB_BULK,
324 				.count = 7,
325 				.endpoint = 0x02,
326 				.u = {
327 					.bulk = {
328 						.buffersize = 4096,
329 					}
330 				}
331 			},
332 		}},
333 		}
334 	},
335 	.identify_state   = digitv_identify_state,
336 
337 	.rc.legacy = {
338 		.rc_interval      = 1000,
339 		.rc_map_table     = rc_map_digitv_table,
340 		.rc_map_size      = ARRAY_SIZE(rc_map_digitv_table),
341 		.rc_query         = digitv_rc_query,
342 	},
343 
344 	.i2c_algo         = &digitv_i2c_algo,
345 
346 	.generic_bulk_ctrl_endpoint = 0x01,
347 
348 	.num_device_descs = 1,
349 	.devices = {
350 		{   "Nebula Electronics uDigiTV DVB-T USB2.0)",
351 			{ &digitv_table[ANCHOR_NEBULA_DIGITV], NULL },
352 			{ NULL },
353 		},
354 		{ NULL },
355 	}
356 };
357 
358 static struct usb_driver digitv_driver = {
359 	.name		= "dvb_usb_digitv",
360 	.probe		= digitv_probe,
361 	.disconnect = dvb_usb_device_exit,
362 	.id_table	= digitv_table,
363 };
364 
365 module_usb_driver(digitv_driver);
366 
367 MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@posteo.de>");
368 MODULE_DESCRIPTION("Driver for Nebula Electronics uDigiTV DVB-T USB2.0");
369 MODULE_VERSION("1.0-alpha");
370 MODULE_LICENSE("GPL");
371