summaryrefslogtreecommitdiff
path: root/drivers/media/dvb-frontends/sp2.c
blob: 8fd42767e263da4998d2e3e5676bd258a1d5246c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
/*
 * CIMaX SP2/SP2HF (Atmel T90FJR) CI driver
 *
 * Copyright (C) 2014 Olli Salonen <olli.salonen@iki.fi>
 *
 * Heavily based on CIMax2(R) SP2 driver in conjunction with NetUp Dual
 * DVB-S2 CI card (cimax2) with following copyrights:
 *
 *  Copyright (C) 2009 NetUP Inc.
 *  Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru>
 *  Copyright (C) 2009 Abylay Ospan <aospan@netup.ru>
 *
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; either version 2 of the License, or
 *    (at your option) any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 */

#include "sp2_priv.h"

static int sp2_read_i2c(struct sp2 *s, u8 reg, u8 *buf, int len)
{
	int ret;
	struct i2c_client *client = s->client;
	struct i2c_adapter *adap = client->adapter;
	struct i2c_msg msg[] = {
		{
			.addr = client->addr,
			.flags = 0,
			.buf = &reg,
			.len = 1
		}, {
			.addr = client->addr,
			.flags	= I2C_M_RD,
			.buf = buf,
			.len = len
		}
	};

	ret = i2c_transfer(adap, msg, 2);

	if (ret != 2) {
		dev_err(&client->dev, "i2c read error, reg = 0x%02x, status = %d\n",
				reg, ret);
		if (ret < 0)
			return ret;
		else
			return -EIO;
	}

	dev_dbg(&s->client->dev, "addr=0x%04x, reg = 0x%02x, data = %02x\n",
				client->addr, reg, buf[0]);

	return 0;
}

static int sp2_write_i2c(struct sp2 *s, u8 reg, u8 *buf, int len)
{
	int ret;
	u8 buffer[35];
	struct i2c_client *client = s->client;
	struct i2c_adapter *adap = client->adapter;
	struct i2c_msg msg = {
		.addr = client->addr,
		.flags = 0,
		.buf = &buffer[0],
		.len = len + 1
	};

	if ((len + 1) > sizeof(buffer)) {
		dev_err(&client->dev, "i2c wr reg=%02x: len=%d is too big!\n",
				reg, len);
		return -EINVAL;
	}

	buffer[0] = reg;
	memcpy(&buffer[1], buf, len);

	ret = i2c_transfer(adap, &msg, 1);

	if (ret != 1) {
		dev_err(&client->dev, "i2c write error, reg = 0x%02x, status = %d\n",
				reg, ret);
		if (ret < 0)
			return ret;
		else
			return -EIO;
	}

	dev_dbg(&s->client->dev, "addr=0x%04x, reg = 0x%02x, data = %*ph\n",
				client->addr, reg, len, buf);

	return 0;
}

static int sp2_ci_op_cam(struct dvb_ca_en50221 *en50221, int slot, u8 acs,
			u8 read, int addr, u8 data)
{
	struct sp2 *s = en50221->data;
	u8 store;
	int mem, ret;
	int (*ci_op_cam)(void*, u8, int, u8, int*) = s->ci_control;

	if (slot != 0)
		return -EINVAL;

	/*
	 * change module access type between IO space and attribute memory
	 * when needed
	 */
	if (s->module_access_type != acs) {
		ret = sp2_read_i2c(s, 0x00, &store, 1);

		if (ret)
			return ret;

		store &= ~(SP2_MOD_CTL_ACS1 | SP2_MOD_CTL_ACS0);
		store |= acs;

		ret = sp2_write_i2c(s, 0x00, &store, 1);
		if (ret)
			return ret;
	}

	s->module_access_type = acs;

	/* implementation of ci_op_cam is device specific */
	if (ci_op_cam) {
		ret = ci_op_cam(s->priv, read, addr, data, &mem);
	} else {
		dev_err(&s->client->dev, "callback not defined");
		return -EINVAL;
	}

	if (ret)
		return ret;

	dev_dbg(&s->client->dev, "%s: slot=%d, addr=0x%04x, %s, data=%x",
			(read) ? "read" : "write", slot, addr,
			(acs == SP2_CI_ATTR_ACS) ? "attr" : "io",
			(read) ? mem : data);

	if (read)
		return mem;
	else
		return 0;

}

int sp2_ci_read_attribute_mem(struct dvb_ca_en50221 *en50221,
				int slot, int addr)
{
	return sp2_ci_op_cam(en50221, slot, SP2_CI_ATTR_ACS,
			SP2_CI_RD, addr, 0);
}

int sp2_ci_write_attribute_mem(struct dvb_ca_en50221 *en50221,
				int slot, int addr, u8 data)
{
	return sp2_ci_op_cam(en50221, slot, SP2_CI_ATTR_ACS,
			SP2_CI_WR, addr, data);
}

int sp2_ci_read_cam_control(struct dvb_ca_en50221 *en50221,
				int slot, u8 addr)
{
	return sp2_ci_op_cam(en50221, slot, SP2_CI_IO_ACS,
			SP2_CI_RD, addr, 0);
}

int sp2_ci_write_cam_control(struct dvb_ca_en50221 *en50221,
				int slot, u8 addr, u8 data)
{
	return sp2_ci_op_cam(en50221, slot, SP2_CI_IO_ACS,
			SP2_CI_WR, addr, data);
}

int sp2_ci_slot_reset(struct dvb_ca_en50221 *en50221, int slot)
{
	struct sp2 *s = en50221->data;
	u8 buf;
	int ret;

	dev_dbg(&s->client->dev, "slot: %d\n", slot);

	if (slot != 0)
		return -EINVAL;

	/* RST on */
	buf = SP2_MOD_CTL_RST;
	ret = sp2_write_i2c(s, 0x00, &buf, 1);

	if (ret)
		return ret;

	usleep_range(500, 600);

	/* RST off */
	buf = 0x00;
	ret = sp2_write_i2c(s, 0x00, &buf, 1);

	if (ret)
		return ret;

	msleep(1000);

	return 0;
}

int sp2_ci_slot_shutdown(struct dvb_ca_en50221 *en50221, int slot)
{
	struct sp2 *s = en50221->data;

	dev_dbg(&s->client->dev, "slot:%d\n", slot);

	/* not implemented */
	return 0;
}

int sp2_ci_slot_ts_enable(struct dvb_ca_en50221 *en50221, int slot)
{
	struct sp2 *s = en50221->data;
	u8 buf;

	dev_dbg(&s->client->dev, "slot:%d\n", slot);

	if (slot != 0)
		return -EINVAL;

	sp2_read_i2c(s, 0x00, &buf, 1);

	/* disable bypass and enable TS */
	buf |= (SP2_MOD_CTL_TSOEN | SP2_MOD_CTL_TSIEN);
	return sp2_write_i2c(s, 0, &buf, 1);
}

int sp2_ci_poll_slot_status(struct dvb_ca_en50221 *en50221,
				int slot, int open)
{
	struct sp2 *s = en50221->data;
	u8 buf[2];
	int ret;

	dev_dbg(&s->client->dev, "slot:%d open:%d\n", slot, open);

	/*
	 * CAM module INSERT/REMOVE processing. Slow operation because of i2c
	 * transfers. Throttle read to one per sec.
	 */
	if (time_after(jiffies, s->next_status_checked_time)) {
		ret = sp2_read_i2c(s, 0x00, buf, 1);
		s->next_status_checked_time = jiffies +	msecs_to_jiffies(1000);

		if (ret)
			return 0;

		if (buf[0] & SP2_MOD_CTL_DET)
			s->status = DVB_CA_EN50221_POLL_CAM_PRESENT |
					DVB_CA_EN50221_POLL_CAM_READY;
		else
			s->status = 0;
	}

	return s->status;
}

static int sp2_init(struct sp2 *s)
{
	int ret = 0;
	u8 buf;
	u8 cimax_init[34] = {
		0x00, /* module A control*/
		0x00, /* auto select mask high A */
		0x00, /* auto select mask low A */
		0x00, /* auto select pattern high A */
		0x00, /* auto select pattern low A */
		0x44, /* memory access time A, 600 ns */
		0x00, /* invert input A */
		0x00, /* RFU */
		0x00, /* RFU */
		0x00, /* module B control*/
		0x00, /* auto select mask high B */
		0x00, /* auto select mask low B */
		0x00, /* auto select pattern high B */
		0x00, /* auto select pattern low B */
		0x44, /* memory access time B, 600 ns */
		0x00, /* invert input B */
		0x00, /* RFU */
		0x00, /* RFU */
		0x00, /* auto select mask high Ext */
		0x00, /* auto select mask low Ext */
		0x00, /* auto select pattern high Ext */
		0x00, /* auto select pattern low Ext */
		0x00, /* RFU */
		0x02, /* destination - module A */
		0x01, /* power control reg, VCC power on */
		0x00, /* RFU */
		0x00, /* int status read only */
		0x00, /* Interrupt Mask Register */
		0x05, /* EXTINT=active-high, INT=push-pull */
		0x00, /* USCG1 */
		0x04, /* ack active low */
		0x00, /* LOCK = 0 */
		0x22, /* unknown */
		0x00, /* synchronization? */
	};

	dev_dbg(&s->client->dev, "\n");

	s->ca.owner = THIS_MODULE;
	s->ca.read_attribute_mem = sp2_ci_read_attribute_mem;
	s->ca.write_attribute_mem = sp2_ci_write_attribute_mem;
	s->ca.read_cam_control = sp2_ci_read_cam_control;
	s->ca.write_cam_control = sp2_ci_write_cam_control;
	s->ca.slot_reset = sp2_ci_slot_reset;
	s->ca.slot_shutdown = sp2_ci_slot_shutdown;
	s->ca.slot_ts_enable = sp2_ci_slot_ts_enable;
	s->ca.poll_slot_status = sp2_ci_poll_slot_status;
	s->ca.data = s;
	s->module_access_type = 0;

	/* initialize all regs */
	ret = sp2_write_i2c(s, 0x00, &cimax_init[0], 34);
	if (ret)
		goto err;

	/* lock registers */
	buf = 1;
	ret = sp2_write_i2c(s, 0x1f, &buf, 1);
	if (ret)
		goto err;

	/* power on slots */
	ret = sp2_write_i2c(s, 0x18, &buf, 1);
	if (ret)
		goto err;

	ret = dvb_ca_en50221_init(s->dvb_adap, &s->ca, 0, 1);
	if (ret)
		goto err;

	return 0;

err:
	dev_dbg(&s->client->dev, "init failed=%d\n", ret);
	return ret;
}

static int sp2_exit(struct i2c_client *client)
{
	struct sp2 *s;

	dev_dbg(&client->dev, "\n");

	if (client == NULL)
		return 0;

	s = i2c_get_clientdata(client);
	if (s == NULL)
		return 0;

	if (s->ca.data == NULL)
		return 0;

	dvb_ca_en50221_release(&s->ca);

	return 0;
}

static int sp2_probe(struct i2c_client *client,
		const struct i2c_device_id *id)
{
	struct sp2_config *cfg = client->dev.platform_data;
	struct sp2 *s;
	int ret;

	dev_dbg(&client->dev, "\n");

	s = kzalloc(sizeof(struct sp2), GFP_KERNEL);
	if (!s) {
		ret = -ENOMEM;
		dev_err(&client->dev, "kzalloc() failed\n");
		goto err;
	}

	s->client = client;
	s->dvb_adap = cfg->dvb_adap;
	s->priv = cfg->priv;
	s->ci_control = cfg->ci_control;

	i2c_set_clientdata(client, s);

	ret = sp2_init(s);
	if (ret)
		goto err;

	dev_info(&s->client->dev, "CIMaX SP2 successfully attached\n");
	return 0;
err:
	dev_dbg(&client->dev, "init failed=%d\n", ret);
	kfree(s);

	return ret;
}

static int sp2_remove(struct i2c_client *client)
{
	struct sp2 *s = i2c_get_clientdata(client);

	dev_dbg(&client->dev, "\n");
	sp2_exit(client);
	kfree(s);
	return 0;
}

static const struct i2c_device_id sp2_id[] = {
	{"sp2", 0},
	{}
};
MODULE_DEVICE_TABLE(i2c, sp2_id);

static struct i2c_driver sp2_driver = {
	.driver = {
		.owner	= THIS_MODULE,
		.name	= "sp2",
	},
	.probe		= sp2_probe,
	.remove		= sp2_remove,
	.id_table	= sp2_id,
};

module_i2c_driver(sp2_driver);

MODULE_DESCRIPTION("CIMaX SP2/HF CI driver");
MODULE_AUTHOR("Olli Salonen <olli.salonen@iki.fi>");
MODULE_LICENSE("GPL");