summaryrefslogtreecommitdiffstats
path: root/drivers/media/video/cx23885/cimax2.c
blob: 9a6536998d904348fb3a0ee5377c18363766de99 (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
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
/*
 * cimax2.c
 *
 * CIMax2(R) SP2 driver in conjunction with NetUp Dual DVB-S2 CI card
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include "cx23885.h"
#include "dvb_ca_en50221.h"
/**** Bit definitions for MC417_RWD and MC417_OEN registers  ***
  bits 31-16
+-----------+
| Reserved  |
+-----------+
  bit 15  bit 14  bit 13 bit 12  bit 11  bit 10  bit 9   bit 8
+-------+-------+-------+-------+-------+-------+-------+-------+
|  WR#  |  RD#  |       |  ACK# |  ADHI |  ADLO |  CS1# |  CS0# |
+-------+-------+-------+-------+-------+-------+-------+-------+
 bit 7   bit 6   bit 5   bit 4   bit 3   bit 2   bit 1   bit 0
+-------+-------+-------+-------+-------+-------+-------+-------+
|  DATA7|  DATA6|  DATA5|  DATA4|  DATA3|  DATA2|  DATA1|  DATA0|
+-------+-------+-------+-------+-------+-------+-------+-------+
***/
/* MC417 */
#define NETUP_DATA		0x000000ff
#define NETUP_WR		0x00008000
#define NETUP_RD		0x00004000
#define NETUP_ACK		0x00001000
#define NETUP_ADHI		0x00000800
#define NETUP_ADLO		0x00000400
#define NETUP_CS1		0x00000200
#define NETUP_CS0		0x00000100
#define NETUP_EN_ALL		0x00001000
#define NETUP_CTRL_OFF		(NETUP_CS1 | NETUP_CS0 | NETUP_WR | NETUP_RD)
#define NETUP_CI_CTL		0x04
#define NETUP_CI_RD		1


static unsigned int ci_dbg;
module_param(ci_dbg, int, 0644);
MODULE_PARM_DESC(ci_dbg, "Enable CI debugging");

#define ci_dbg_print(args...) \
	do { \
		if (ci_dbg) \
			printk(KERN_DEBUG args); \
	} while (0)

/* stores all private variables for communication with CI */
struct netup_ci_state {
	struct dvb_ca_en50221 ca;
	struct mutex ca_mutex;
	struct i2c_adapter *i2c_adap;
	u8 ci_i2c_addr;
	int status;
	struct work_struct work;
	void *priv;
};

struct mutex gpio_mutex;/* Two CiMax's uses same GPIO lines */

int netup_read_i2c(struct i2c_adapter *i2c_adap, u8 addr, u8 reg,
						u8 *buf, int len)
{
	int ret;
	struct i2c_msg msg[] = {
		{
			.addr	= addr,
			.flags	= 0,
			.buf	= &reg,
			.len	= 1
		}, {
			.addr	= addr,
			.flags	= I2C_M_RD,
			.buf	= buf,
			.len	= len
		}
	};

	ret = i2c_transfer(i2c_adap, msg, 2);

	if (ret != 2) {
		ci_dbg_print("%s: i2c read error, Reg = 0x%02x, Status = %d\n",
						__func__, reg, ret);

		return -1;
	}

	ci_dbg_print("%s: i2c read Addr=0x%04x, Reg = 0x%02x, data = %02x\n",
						__func__, addr, reg, buf[0]);

	return 0;
}

int netup_write_i2c(struct i2c_adapter *i2c_adap, u8 addr, u8 reg,
						u8 *buf, int len)
{
	int ret;
	u8 buffer[len + 1];

	struct i2c_msg msg = {
		.addr	= addr,
		.flags	= 0,
		.buf	= &buffer[0],
		.len	= len + 1
	};

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

	ret = i2c_transfer(i2c_adap, &msg, 1);

	if (ret != 1) {
		ci_dbg_print("%s: i2c write error, Reg=[0x%02x], Status=%d\n",
						__func__, reg, ret);
		return -1;
	}

	return 0;
}

int netup_ci_get_mem(struct cx23885_dev *dev)
{
	int mem;
	unsigned long timeout = jiffies + msecs_to_jiffies(1);

	for (;;) {
		mem = cx_read(MC417_RWD);
		if ((mem & NETUP_ACK) == 0)
			break;
		if (time_after(jiffies, timeout))
			break;
		udelay(1);
	}

	cx_set(MC417_RWD, NETUP_CTRL_OFF);

	return mem & 0xff;
}

int netup_ci_op_cam(struct dvb_ca_en50221 *en50221, int slot,
				u8 flag, u8 read, int addr, u8 data)
{
	struct netup_ci_state *state = en50221->data;
	struct cx23885_tsport *port = state->priv;
	struct cx23885_dev *dev = port->dev;

	u8 store;
	int mem;
	int ret;

	if (0 != slot)
		return -EINVAL;

	ret = netup_read_i2c(state->i2c_adap, state->ci_i2c_addr,
							0, &store, 1);
	if (ret != 0)
		return ret;

	store &= ~0x0c;
	store |= flag;

	ret = netup_write_i2c(state->i2c_adap, state->ci_i2c_addr,
							0, &store, 1);
	if (ret != 0)
		return ret;

	mutex_lock(&gpio_mutex);

	/* write addr */
	cx_write(MC417_OEN, NETUP_EN_ALL);
	cx_write(MC417_RWD, NETUP_CTRL_OFF |
				NETUP_ADLO | (0xff & addr));
	cx_clear(MC417_RWD, NETUP_ADLO);
	cx_write(MC417_RWD, NETUP_CTRL_OFF |
				NETUP_ADHI | (0xff & (addr >> 8)));
	cx_clear(MC417_RWD, NETUP_ADHI);

	if (read) /* data in */
		cx_write(MC417_OEN, NETUP_EN_ALL | NETUP_DATA);
	else /* data out */
		cx_write(MC417_RWD, NETUP_CTRL_OFF | data);

	/* choose chip */
	cx_clear(MC417_RWD,
			(state->ci_i2c_addr == 0x40) ? NETUP_CS0 : NETUP_CS1);
	/* read/write */
	cx_clear(MC417_RWD, (read) ? NETUP_RD : NETUP_WR);
	mem = netup_ci_get_mem(dev);

	mutex_unlock(&gpio_mutex);

	if (!read)
		if (mem < 0)
			return -EREMOTEIO;

	ci_dbg_print("%s: %s: addr=[0x%02x], %s=%x\n", __func__,
			(read) ? "read" : "write", addr,
			(flag == NETUP_CI_CTL) ? "ctl" : "mem",
			(read) ? mem : data);

	if (read)
		return mem;

	return 0;
}

int netup_ci_read_attribute_mem(struct dvb_ca_en50221 *en50221,
						int slot, int addr)
{
	return netup_ci_op_cam(en50221, slot, 0, NETUP_CI_RD, addr, 0);
}

int netup_ci_write_attribute_mem(struct dvb_ca_en50221 *en50221,
						int slot, int addr, u8 data)
{
	return netup_ci_op_cam(en50221, slot, 0, 0, addr, data);
}

int netup_ci_read_cam_ctl(struct dvb_ca_en50221 *en50221, int slot, u8 addr)
{
	return netup_ci_op_cam(en50221, slot, NETUP_CI_CTL,
							NETUP_CI_RD, addr, 0);
}

int netup_ci_write_cam_ctl(struct dvb_ca_en50221 *en50221, int slot,
							u8 addr, u8 data)
{
	return netup_ci_op_cam(en50221, slot, NETUP_CI_CTL, 0, addr, data);
}

int netup_ci_slot_reset(struct dvb_ca_en50221 *en50221, int slot)
{
	struct netup_ci_state *state = en50221->data;
	u8 buf =  0x80;
	int ret;

	if (0 != slot)
		return -EINVAL;

	udelay(500);
	ret = netup_write_i2c(state->i2c_adap, state->ci_i2c_addr,
							0, &buf, 1);

	if (ret != 0)
		return ret;

	udelay(500);

	buf = 0x00;
	ret = netup_write_i2c(state->i2c_adap, state->ci_i2c_addr,
							0, &buf, 1);

	msleep(1000);
	dvb_ca_en50221_camready_irq(&state->ca, 0);

	return 0;

}

int netup_ci_slot_shutdown(struct dvb_ca_en50221 *en50221, int slot)
{
	/* not implemented */
	return 0;
}

int netup_ci_slot_ts_ctl(struct dvb_ca_en50221 *en50221, int slot)
{
	struct netup_ci_state *state = en50221->data;
	u8 buf = 0x60;

	if (0 != slot)
		return -EINVAL;

	return netup_write_i2c(state->i2c_adap, state->ci_i2c_addr,
							0, &buf, 1);
}

/* work handler */
static void netup_read_ci_status(struct work_struct *work)
{
	struct netup_ci_state *state =
			container_of(work, struct netup_ci_state, work);
	u8 buf[33];
	int ret;

	ret = netup_read_i2c(state->i2c_adap, state->ci_i2c_addr,
							0, &buf[0], 33);

	if (ret != 0)
		return;

	ci_dbg_print("%s: Slot Status Addr=[0x%04x], Reg=[0x%02x], data=%02x, "
		"TS config = %02x\n", __func__, state->ci_i2c_addr, 0, buf[0],
		buf[32]);

	if (buf[0] && 1)
		state->status = DVB_CA_EN50221_POLL_CAM_PRESENT |
			DVB_CA_EN50221_POLL_CAM_READY;
	else
		state->status = 0;
}

/* CI irq handler */
int netup_ci_slot_status(struct cx23885_dev *dev, u32 pci_status)
{
	struct cx23885_tsport *port = NULL;
	struct netup_ci_state *state = NULL;

	if (pci_status & PCI_MSK_GPIO0)
		port = &dev->ts1;
	else if (pci_status & PCI_MSK_GPIO1)
		port = &dev->ts2;
	else /* who calls ? */
		return 0;

	state = port->port_priv;

	schedule_work(&state->work);

	return 1;
}

int netup_poll_ci_slot_status(struct dvb_ca_en50221 *en50221, int slot, int open)
{
	struct netup_ci_state *state = en50221->data;

	if (0 != slot)
		return -EINVAL;

	return state->status;
}

int netup_ci_init(struct cx23885_tsport *port)
{
	struct netup_ci_state *state;
	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 */
		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 */
		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 on (use it like store place) */
		0x00, /* RFU */
		0x00, /* int status read only */
		0x01, /* all int unmasked */
		0x04, /* int config */
		0x00, /* USCG1 */
		0x04, /* ack active low */
		0x00, /* LOCK = 0 */
		0x33, /* serial mode, rising in, rising out, MSB first*/
		0x31, /* syncronization */
	};
	int ret;

	ci_dbg_print("%s\n", __func__);
	state = kzalloc(sizeof(struct netup_ci_state), GFP_KERNEL);
	if (!state) {
		ci_dbg_print("%s: Unable create CI structure!\n", __func__);
		ret = -ENOMEM;
		goto err;
	}

	port->port_priv = state;

	switch (port->nr) {
	case 1:
		state->ci_i2c_addr = 0x40;
		mutex_init(&gpio_mutex);
		break;
	case 2:
		state->ci_i2c_addr = 0x41;
		break;
	}

	state->i2c_adap = &port->dev->i2c_bus[0].i2c_adap;
	state->ca.owner = THIS_MODULE;
	state->ca.read_attribute_mem = netup_ci_read_attribute_mem;
	state->ca.write_attribute_mem = netup_ci_write_attribute_mem;
	state->ca.read_cam_control = netup_ci_read_cam_ctl;
	state->ca.write_cam_control = netup_ci_write_cam_ctl;
	state->ca.slot_reset = netup_ci_slot_reset;
	state->ca.slot_shutdown = netup_ci_slot_shutdown;
	state->ca.slot_ts_enable = netup_ci_slot_ts_ctl;
	state->ca.poll_slot_status = netup_poll_ci_slot_status;
	state->ca.data = state;
	state->priv = port;

	ret = netup_write_i2c(state->i2c_adap, state->ci_i2c_addr,
						0, &cimax_init[0], 34);
	/* lock registers */
	ret |= netup_write_i2c(state->i2c_adap, state->ci_i2c_addr,
						0x1f, &cimax_init[0x18], 1);
	/* power on slots */
	ret |= netup_write_i2c(state->i2c_adap, state->ci_i2c_addr,
						0x18, &cimax_init[0x18], 1);

	if (0 != ret)
		goto err;

	ret = dvb_ca_en50221_init(&port->frontends.adapter,
				   &state->ca,
				   /* flags */ 0,
				   /* n_slots */ 1);
	if (0 != ret)
		goto err;

	INIT_WORK(&state->work, netup_read_ci_status);

	ci_dbg_print("%s: CI initialized!\n", __func__);

	return 0;
err:
	ci_dbg_print("%s: Cannot initialize CI: Error %d.\n", __func__, ret);
	kfree(state);
	return ret;
}

void netup_ci_exit(struct cx23885_tsport *port)
{
	struct netup_ci_state *state;

	if (NULL == port)
		return;

	state = (struct netup_ci_state *)port->port_priv;
	if (NULL == state)
		return;

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

	dvb_ca_en50221_release(&state->ca);
	kfree(state);
}