xref: /openbmc/linux/drivers/media/pci/bt8xx/dst_ca.c (revision 86495af1)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 	CA-driver for TwinHan DST Frontend/Card
4 
5 	Copyright (C) 2004, 2005 Manu Abraham (manu@kromtek.com)
6 
7 */
8 
9 #include <linux/kernel.h>
10 #include <linux/module.h>
11 #include <linux/slab.h>
12 #include <linux/init.h>
13 #include <linux/mutex.h>
14 #include <linux/string.h>
15 #include <linux/dvb/ca.h>
16 #include <media/dvbdev.h>
17 #include <media/dvb_frontend.h>
18 #include "dst_ca.h"
19 #include "dst_common.h"
20 
21 #define DST_CA_ERROR		0
22 #define DST_CA_NOTICE		1
23 #define DST_CA_INFO		2
24 #define DST_CA_DEBUG		3
25 
26 #define dprintk(x, y, z, format, arg...) do {						\
27 	if (z) {									\
28 		if	((x > DST_CA_ERROR) && (x > y))					\
29 			printk(KERN_ERR "%s: " format "\n", __func__ , ##arg);	\
30 		else if	((x > DST_CA_NOTICE) && (x > y))				\
31 			printk(KERN_NOTICE "%s: " format "\n", __func__ , ##arg);	\
32 		else if ((x > DST_CA_INFO) && (x > y))					\
33 			printk(KERN_INFO "%s: " format "\n", __func__ , ##arg);	\
34 		else if ((x > DST_CA_DEBUG) && (x > y))					\
35 			printk(KERN_DEBUG "%s: " format "\n", __func__ , ##arg);	\
36 	} else {									\
37 		if (x > y)								\
38 			printk(format, ## arg);						\
39 	}										\
40 } while(0)
41 
42 
43 static DEFINE_MUTEX(dst_ca_mutex);
44 static unsigned int verbose = 5;
45 module_param(verbose, int, 0644);
46 MODULE_PARM_DESC(verbose, "verbose startup messages, default is 1 (yes)");
47 
put_command_and_length(u8 * data,int command,int length)48 static void put_command_and_length(u8 *data, int command, int length)
49 {
50 	data[0] = (command >> 16) & 0xff;
51 	data[1] = (command >> 8) & 0xff;
52 	data[2] = command & 0xff;
53 	data[3] = length;
54 }
55 
put_checksum(u8 * check_string,int length)56 static void put_checksum(u8 *check_string, int length)
57 {
58 	dprintk(verbose, DST_CA_DEBUG, 1, " Computing string checksum.");
59 	dprintk(verbose, DST_CA_DEBUG, 1, "  -> string length : 0x%02x", length);
60 	check_string[length] = dst_check_sum (check_string, length);
61 	dprintk(verbose, DST_CA_DEBUG, 1, "  -> checksum      : 0x%02x", check_string[length]);
62 }
63 
dst_ci_command(struct dst_state * state,u8 * data,u8 * ca_string,u8 len,int read)64 static int dst_ci_command(struct dst_state* state, u8 * data, u8 *ca_string, u8 len, int read)
65 {
66 	u8 reply;
67 
68 	mutex_lock(&state->dst_mutex);
69 	dst_comm_init(state);
70 	msleep(65);
71 
72 	if (write_dst(state, data, len)) {
73 		dprintk(verbose, DST_CA_INFO, 1, " Write not successful, trying to recover");
74 		dst_error_recovery(state);
75 		goto error;
76 	}
77 	if ((dst_pio_disable(state)) < 0) {
78 		dprintk(verbose, DST_CA_ERROR, 1, " DST PIO disable failed.");
79 		goto error;
80 	}
81 	if (read_dst(state, &reply, GET_ACK) < 0) {
82 		dprintk(verbose, DST_CA_INFO, 1, " Read not successful, trying to recover");
83 		dst_error_recovery(state);
84 		goto error;
85 	}
86 	if (read) {
87 		if (! dst_wait_dst_ready(state, LONG_DELAY)) {
88 			dprintk(verbose, DST_CA_NOTICE, 1, " 8820 not ready");
89 			goto error;
90 		}
91 		if (read_dst(state, ca_string, 128) < 0) {	/*	Try to make this dynamic	*/
92 			dprintk(verbose, DST_CA_INFO, 1, " Read not successful, trying to recover");
93 			dst_error_recovery(state);
94 			goto error;
95 		}
96 	}
97 	mutex_unlock(&state->dst_mutex);
98 	return 0;
99 
100 error:
101 	mutex_unlock(&state->dst_mutex);
102 	return -EIO;
103 }
104 
105 
dst_put_ci(struct dst_state * state,u8 * data,int len,u8 * ca_string,int read)106 static int dst_put_ci(struct dst_state *state, u8 *data, int len, u8 *ca_string, int read)
107 {
108 	u8 dst_ca_comm_err = 0;
109 
110 	while (dst_ca_comm_err < RETRIES) {
111 		dprintk(verbose, DST_CA_NOTICE, 1, " Put Command");
112 		if (dst_ci_command(state, data, ca_string, len, read)) {	// If error
113 			dst_error_recovery(state);
114 			dst_ca_comm_err++; // work required here.
115 		} else {
116 			break;
117 		}
118 	}
119 
120 	if(dst_ca_comm_err == RETRIES)
121 		return -EIO;
122 
123 	return 0;
124 }
125 
126 
127 
ca_get_app_info(struct dst_state * state)128 static int ca_get_app_info(struct dst_state *state)
129 {
130 	int length, str_length;
131 	static u8 command[8] = {0x07, 0x40, 0x01, 0x00, 0x01, 0x00, 0x00, 0xff};
132 
133 	put_checksum(&command[0], command[0]);
134 	if ((dst_put_ci(state, command, sizeof(command), state->messages, GET_REPLY)) < 0) {
135 		dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");
136 		return -EIO;
137 	}
138 	dprintk(verbose, DST_CA_INFO, 1, " -->dst_put_ci SUCCESS !");
139 	dprintk(verbose, DST_CA_INFO, 1, " ================================ CI Module Application Info ======================================");
140 	dprintk(verbose, DST_CA_INFO, 1, " Application Type=[%d], Application Vendor=[%d], Vendor Code=[%d]\n%s: Application info=[%s]",
141 		state->messages[7], (state->messages[8] << 8) | state->messages[9],
142 		(state->messages[10] << 8) | state->messages[11], __func__, (char *)(&state->messages[12]));
143 	dprintk(verbose, DST_CA_INFO, 1, " ==================================================================================================");
144 
145 	// Transform dst message to correct application_info message
146 	length = state->messages[5];
147 	str_length = length - 6;
148 	if (str_length < 0) {
149 		str_length = 0;
150 		dprintk(verbose, DST_CA_ERROR, 1, "Invalid string length returned in ca_get_app_info(). Recovering.");
151 	}
152 
153 	// First, the command and length fields
154 	put_command_and_length(&state->messages[0], CA_APP_INFO, length);
155 
156 	// Copy application_type, application_manufacturer and manufacturer_code
157 	memmove(&state->messages[4], &state->messages[7], 5);
158 
159 	// Set string length and copy string
160 	state->messages[9] = str_length;
161 	memmove(&state->messages[10], &state->messages[12], str_length);
162 
163 	return 0;
164 }
165 
ca_get_ca_info(struct dst_state * state)166 static int ca_get_ca_info(struct dst_state *state)
167 {
168 	int srcPtr, dstPtr, i, num_ids;
169 	static u8 slot_command[8] = {0x07, 0x40, 0x00, 0x00, 0x02, 0x00, 0x00, 0xff};
170 	const int in_system_id_pos = 8, out_system_id_pos = 4, in_num_ids_pos = 7;
171 
172 	put_checksum(&slot_command[0], slot_command[0]);
173 	if ((dst_put_ci(state, slot_command, sizeof (slot_command), state->messages, GET_REPLY)) < 0) {
174 		dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");
175 		return -EIO;
176 	}
177 	dprintk(verbose, DST_CA_INFO, 1, " -->dst_put_ci SUCCESS !");
178 
179 	// Print raw data
180 	dprintk(verbose, DST_CA_INFO, 0, " DST data = [");
181 	for (i = 0; i < state->messages[0] + 1; i++) {
182 		dprintk(verbose, DST_CA_INFO, 0, " 0x%02x", state->messages[i]);
183 	}
184 	dprintk(verbose, DST_CA_INFO, 0, "]\n");
185 
186 	// Set the command and length of the output
187 	num_ids = state->messages[in_num_ids_pos];
188 	if (num_ids >= 100) {
189 		num_ids = 100;
190 		dprintk(verbose, DST_CA_ERROR, 1, "Invalid number of ids (>100). Recovering.");
191 	}
192 	put_command_and_length(&state->messages[0], CA_INFO, num_ids * 2);
193 
194 	dprintk(verbose, DST_CA_INFO, 0, " CA_INFO = [");
195 	srcPtr = in_system_id_pos;
196 	dstPtr = out_system_id_pos;
197 	for(i = 0; i < num_ids; i++) {
198 		dprintk(verbose, DST_CA_INFO, 0, " 0x%02x%02x", state->messages[srcPtr + 0], state->messages[srcPtr + 1]);
199 		// Append to output
200 		state->messages[dstPtr + 0] = state->messages[srcPtr + 0];
201 		state->messages[dstPtr + 1] = state->messages[srcPtr + 1];
202 		srcPtr += 2;
203 		dstPtr += 2;
204 	}
205 	dprintk(verbose, DST_CA_INFO, 0, "]\n");
206 
207 	return 0;
208 }
209 
ca_get_slot_caps(struct dst_state * state,struct ca_caps * p_ca_caps,void __user * arg)210 static int ca_get_slot_caps(struct dst_state *state, struct ca_caps *p_ca_caps, void __user *arg)
211 {
212 	int i;
213 	u8 slot_cap[256];
214 	static u8 slot_command[8] = {0x07, 0x40, 0x02, 0x00, 0x02, 0x00, 0x00, 0xff};
215 
216 	put_checksum(&slot_command[0], slot_command[0]);
217 	if ((dst_put_ci(state, slot_command, sizeof (slot_command), slot_cap, GET_REPLY)) < 0) {
218 		dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");
219 		return -EIO;
220 	}
221 	dprintk(verbose, DST_CA_NOTICE, 1, " -->dst_put_ci SUCCESS !");
222 
223 	/*	Will implement the rest soon		*/
224 
225 	dprintk(verbose, DST_CA_INFO, 1, " Slot cap = [%d]", slot_cap[7]);
226 	dprintk(verbose, DST_CA_INFO, 0, "===================================\n");
227 	for (i = 0; i < slot_cap[0] + 1; i++)
228 		dprintk(verbose, DST_CA_INFO, 0, " %d", slot_cap[i]);
229 	dprintk(verbose, DST_CA_INFO, 0, "\n");
230 
231 	p_ca_caps->slot_num = 1;
232 	p_ca_caps->slot_type = 1;
233 	p_ca_caps->descr_num = slot_cap[7];
234 	p_ca_caps->descr_type = 1;
235 
236 	if (copy_to_user(arg, p_ca_caps, sizeof (struct ca_caps)))
237 		return -EFAULT;
238 
239 	return 0;
240 }
241 
242 /*	Need some more work	*/
ca_get_slot_descr(struct dst_state * state,struct ca_msg * p_ca_message,void __user * arg)243 static int ca_get_slot_descr(struct dst_state *state, struct ca_msg *p_ca_message, void __user *arg)
244 {
245 	return -EOPNOTSUPP;
246 }
247 
248 
ca_get_slot_info(struct dst_state * state,struct ca_slot_info * p_ca_slot_info,void __user * arg)249 static int ca_get_slot_info(struct dst_state *state, struct ca_slot_info *p_ca_slot_info, void __user *arg)
250 {
251 	int i;
252 	static u8 slot_command[8] = {0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff};
253 
254 	u8 *slot_info = state->messages;
255 
256 	put_checksum(&slot_command[0], 7);
257 	if ((dst_put_ci(state, slot_command, sizeof (slot_command), slot_info, GET_REPLY)) < 0) {
258 		dprintk(verbose, DST_CA_ERROR, 1, " -->dst_put_ci FAILED !");
259 		return -EIO;
260 	}
261 	dprintk(verbose, DST_CA_INFO, 1, " -->dst_put_ci SUCCESS !");
262 
263 	/*	Will implement the rest soon		*/
264 
265 	dprintk(verbose, DST_CA_INFO, 1, " Slot info = [%d]", slot_info[3]);
266 	dprintk(verbose, DST_CA_INFO, 0, "===================================\n");
267 	for (i = 0; i < 8; i++)
268 		dprintk(verbose, DST_CA_INFO, 0, " %d", slot_info[i]);
269 	dprintk(verbose, DST_CA_INFO, 0, "\n");
270 
271 	if (slot_info[4] & 0x80) {
272 		p_ca_slot_info->flags = CA_CI_MODULE_PRESENT;
273 		p_ca_slot_info->num = 1;
274 		p_ca_slot_info->type = CA_CI;
275 	} else if (slot_info[4] & 0x40) {
276 		p_ca_slot_info->flags = CA_CI_MODULE_READY;
277 		p_ca_slot_info->num = 1;
278 		p_ca_slot_info->type = CA_CI;
279 	} else
280 		p_ca_slot_info->flags = 0;
281 
282 	if (copy_to_user(arg, p_ca_slot_info, sizeof (struct ca_slot_info)))
283 		return -EFAULT;
284 
285 	return 0;
286 }
287 
288 
ca_get_message(struct dst_state * state,struct ca_msg * p_ca_message,void __user * arg)289 static int ca_get_message(struct dst_state *state, struct ca_msg *p_ca_message, void __user *arg)
290 {
291 	u8 i = 0;
292 	u32 command = 0;
293 
294 	if (copy_from_user(p_ca_message, arg, sizeof (struct ca_msg)))
295 		return -EFAULT;
296 
297 	dprintk(verbose, DST_CA_NOTICE, 1, " Message = [%*ph]",
298 		3, p_ca_message->msg);
299 
300 	for (i = 0; i < 3; i++) {
301 		command = command | p_ca_message->msg[i];
302 		if (i < 2)
303 			command = command << 8;
304 	}
305 	dprintk(verbose, DST_CA_NOTICE, 1, " Command=[0x%x]", command);
306 
307 	switch (command) {
308 	case CA_APP_INFO:
309 		memcpy(p_ca_message->msg, state->messages, 128);
310 		if (copy_to_user(arg, p_ca_message, sizeof (struct ca_msg)) )
311 			return -EFAULT;
312 		break;
313 	case CA_INFO:
314 		memcpy(p_ca_message->msg, state->messages, 128);
315 		if (copy_to_user(arg, p_ca_message, sizeof (struct ca_msg)) )
316 			return -EFAULT;
317 		break;
318 	}
319 
320 	return 0;
321 }
322 
handle_dst_tag(struct dst_state * state,struct ca_msg * p_ca_message,struct ca_msg * hw_buffer,u32 length)323 static int handle_dst_tag(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer, u32 length)
324 {
325 	if (state->dst_hw_cap & DST_TYPE_HAS_SESSION) {
326 		hw_buffer->msg[2] = p_ca_message->msg[1];	/*	MSB	*/
327 		hw_buffer->msg[3] = p_ca_message->msg[2];	/*	LSB	*/
328 	} else {
329 		if (length > 247) {
330 			dprintk(verbose, DST_CA_ERROR, 1, " Message too long ! *** Bailing Out *** !");
331 			return -EIO;
332 		}
333 		hw_buffer->msg[0] = (length & 0xff) + 7;
334 		hw_buffer->msg[1] = 0x40;
335 		hw_buffer->msg[2] = 0x03;
336 		hw_buffer->msg[3] = 0x00;
337 		hw_buffer->msg[4] = 0x03;
338 		hw_buffer->msg[5] = length & 0xff;
339 		hw_buffer->msg[6] = 0x00;
340 
341 		/*
342 		 *	Need to compute length for EN50221 section 8.3.2, for the time being
343 		 *	assuming 8.3.2 is not applicable
344 		 */
345 		memcpy(&hw_buffer->msg[7], &p_ca_message->msg[4], length);
346 	}
347 
348 	return 0;
349 }
350 
write_to_8820(struct dst_state * state,struct ca_msg * hw_buffer,u8 length,u8 reply)351 static int write_to_8820(struct dst_state *state, struct ca_msg *hw_buffer, u8 length, u8 reply)
352 {
353 	if ((dst_put_ci(state, hw_buffer->msg, length, hw_buffer->msg, reply)) < 0) {
354 		dprintk(verbose, DST_CA_ERROR, 1, " DST-CI Command failed.");
355 		dprintk(verbose, DST_CA_NOTICE, 1, " Resetting DST.");
356 		rdc_reset_state(state);
357 		return -EIO;
358 	}
359 	dprintk(verbose, DST_CA_NOTICE, 1, " DST-CI Command success.");
360 
361 	return 0;
362 }
363 
asn_1_decode(u8 * asn_1_array)364 static u32 asn_1_decode(u8 *asn_1_array)
365 {
366 	u8 length_field = 0, word_count = 0, count = 0;
367 	u32 length = 0;
368 
369 	length_field = asn_1_array[0];
370 	dprintk(verbose, DST_CA_DEBUG, 1, " Length field=[%02x]", length_field);
371 	if (length_field < 0x80) {
372 		length = length_field & 0x7f;
373 		dprintk(verbose, DST_CA_DEBUG, 1, " Length=[%02x]\n", length);
374 	} else {
375 		word_count = length_field & 0x7f;
376 		for (count = 0; count < word_count; count++) {
377 			length = length  << 8;
378 			length += asn_1_array[count + 1];
379 			dprintk(verbose, DST_CA_DEBUG, 1, " Length=[%04x]", length);
380 		}
381 	}
382 	return length;
383 }
384 
debug_string(u8 * msg,u32 length,u32 offset)385 static int debug_string(u8 *msg, u32 length, u32 offset)
386 {
387 	u32 i;
388 
389 	dprintk(verbose, DST_CA_DEBUG, 0, " String=[ ");
390 	for (i = offset; i < length; i++)
391 		dprintk(verbose, DST_CA_DEBUG, 0, "%02x ", msg[i]);
392 	dprintk(verbose, DST_CA_DEBUG, 0, "]\n");
393 
394 	return 0;
395 }
396 
397 
ca_set_pmt(struct dst_state * state,struct ca_msg * p_ca_message,struct ca_msg * hw_buffer,u8 reply,u8 query)398 static int ca_set_pmt(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer, u8 reply, u8 query)
399 {
400 	u32 length = 0;
401 	u8 tag_length = 8;
402 
403 	length = asn_1_decode(&p_ca_message->msg[3]);
404 	dprintk(verbose, DST_CA_DEBUG, 1, " CA Message length=[%d]", length);
405 	debug_string(&p_ca_message->msg[4], length, 0); /*	length is excluding tag & length	*/
406 
407 	memset(hw_buffer->msg, '\0', length);
408 	handle_dst_tag(state, p_ca_message, hw_buffer, length);
409 	put_checksum(hw_buffer->msg, hw_buffer->msg[0]);
410 
411 	debug_string(hw_buffer->msg, (length + tag_length), 0); /*	tags too	*/
412 	write_to_8820(state, hw_buffer, (length + tag_length), reply);
413 
414 	return 0;
415 }
416 
417 
418 /*	Board supports CA PMT reply ?		*/
dst_check_ca_pmt(struct dst_state * state,struct ca_msg * p_ca_message,struct ca_msg * hw_buffer)419 static int dst_check_ca_pmt(struct dst_state *state, struct ca_msg *p_ca_message, struct ca_msg *hw_buffer)
420 {
421 	int ca_pmt_reply_test = 0;
422 
423 	/*	Do test board			*/
424 	/*	Not there yet but soon		*/
425 
426 	/*	CA PMT Reply capable		*/
427 	if (ca_pmt_reply_test) {
428 		if ((ca_set_pmt(state, p_ca_message, hw_buffer, 1, GET_REPLY)) < 0) {
429 			dprintk(verbose, DST_CA_ERROR, 1, " ca_set_pmt.. failed !");
430 			return -EIO;
431 		}
432 
433 	/*	Process CA PMT Reply		*/
434 	/*	will implement soon		*/
435 		dprintk(verbose, DST_CA_ERROR, 1, " Not there yet");
436 	}
437 	/*	CA PMT Reply not capable	*/
438 	if (!ca_pmt_reply_test) {
439 		if ((ca_set_pmt(state, p_ca_message, hw_buffer, 0, NO_REPLY)) < 0) {
440 			dprintk(verbose, DST_CA_ERROR, 1, " ca_set_pmt.. failed !");
441 			return -EIO;
442 		}
443 		dprintk(verbose, DST_CA_NOTICE, 1, " ca_set_pmt.. success !");
444 	/*	put a dummy message		*/
445 
446 	}
447 	return 0;
448 }
449 
ca_send_message(struct dst_state * state,struct ca_msg * p_ca_message,void __user * arg)450 static int ca_send_message(struct dst_state *state, struct ca_msg *p_ca_message, void __user *arg)
451 {
452 	int i;
453 	u32 command;
454 	struct ca_msg *hw_buffer;
455 	int result = 0;
456 
457 	hw_buffer = kmalloc(sizeof(*hw_buffer), GFP_KERNEL);
458 	if (!hw_buffer)
459 		return -ENOMEM;
460 	dprintk(verbose, DST_CA_DEBUG, 1, " ");
461 
462 	if (copy_from_user(p_ca_message, arg, sizeof (struct ca_msg))) {
463 		result = -EFAULT;
464 		goto free_mem_and_exit;
465 	}
466 
467 	/*	EN50221 tag	*/
468 	command = 0;
469 
470 	for (i = 0; i < 3; i++) {
471 		command = command | p_ca_message->msg[i];
472 		if (i < 2)
473 			command = command << 8;
474 	}
475 	dprintk(verbose, DST_CA_DEBUG, 1, " Command=[0x%x]\n", command);
476 
477 	switch (command) {
478 	case CA_PMT:
479 		dprintk(verbose, DST_CA_DEBUG, 1, "Command = SEND_CA_PMT");
480 		if ((ca_set_pmt(state, p_ca_message, hw_buffer, 0, 0)) < 0) {	// code simplification started
481 			dprintk(verbose, DST_CA_ERROR, 1, " -->CA_PMT Failed !");
482 			result = -1;
483 			goto free_mem_and_exit;
484 		}
485 		dprintk(verbose, DST_CA_INFO, 1, " -->CA_PMT Success !");
486 		break;
487 	case CA_PMT_REPLY:
488 		dprintk(verbose, DST_CA_INFO, 1, "Command = CA_PMT_REPLY");
489 		/*      Have to handle the 2 basic types of cards here  */
490 		if ((dst_check_ca_pmt(state, p_ca_message, hw_buffer)) < 0) {
491 			dprintk(verbose, DST_CA_ERROR, 1, " -->CA_PMT_REPLY Failed !");
492 			result = -1;
493 			goto free_mem_and_exit;
494 		}
495 		dprintk(verbose, DST_CA_INFO, 1, " -->CA_PMT_REPLY Success !");
496 		break;
497 	case CA_APP_INFO_ENQUIRY:		// only for debugging
498 		dprintk(verbose, DST_CA_INFO, 1, " Getting Cam Application information");
499 
500 		if ((ca_get_app_info(state)) < 0) {
501 			dprintk(verbose, DST_CA_ERROR, 1, " -->CA_APP_INFO_ENQUIRY Failed !");
502 			result = -1;
503 			goto free_mem_and_exit;
504 		}
505 		dprintk(verbose, DST_CA_INFO, 1, " -->CA_APP_INFO_ENQUIRY Success !");
506 		break;
507 	case CA_INFO_ENQUIRY:
508 		dprintk(verbose, DST_CA_INFO, 1, " Getting CA Information");
509 
510 		if ((ca_get_ca_info(state)) < 0) {
511 			dprintk(verbose, DST_CA_ERROR, 1, " -->CA_INFO_ENQUIRY Failed !");
512 			result = -1;
513 			goto free_mem_and_exit;
514 		}
515 		dprintk(verbose, DST_CA_INFO, 1, " -->CA_INFO_ENQUIRY Success !");
516 		break;
517 	}
518 
519 free_mem_and_exit:
520 	kfree (hw_buffer);
521 
522 	return result;
523 }
524 
dst_ca_ioctl(struct file * file,unsigned int cmd,unsigned long ioctl_arg)525 static long dst_ca_ioctl(struct file *file, unsigned int cmd, unsigned long ioctl_arg)
526 {
527 	struct dvb_device *dvbdev;
528 	struct dst_state *state;
529 	struct ca_slot_info *p_ca_slot_info;
530 	struct ca_caps *p_ca_caps;
531 	struct ca_msg *p_ca_message;
532 	void __user *arg = (void __user *)ioctl_arg;
533 	int result = 0;
534 
535 	mutex_lock(&dst_ca_mutex);
536 	dvbdev = file->private_data;
537 	state = dvbdev->priv;
538 	p_ca_message = kmalloc(sizeof (struct ca_msg), GFP_KERNEL);
539 	p_ca_slot_info = kmalloc(sizeof (struct ca_slot_info), GFP_KERNEL);
540 	p_ca_caps = kmalloc(sizeof (struct ca_caps), GFP_KERNEL);
541 	if (!p_ca_message || !p_ca_slot_info || !p_ca_caps) {
542 		result = -ENOMEM;
543 		goto free_mem_and_exit;
544 	}
545 
546 	/*	We have now only the standard ioctl's, the driver is upposed to handle internals.	*/
547 	switch (cmd) {
548 	case CA_SEND_MSG:
549 		dprintk(verbose, DST_CA_INFO, 1, " Sending message");
550 		result = ca_send_message(state, p_ca_message, arg);
551 
552 		if (result < 0) {
553 			dprintk(verbose, DST_CA_ERROR, 1, " -->CA_SEND_MSG Failed !");
554 			goto free_mem_and_exit;
555 		}
556 		break;
557 	case CA_GET_MSG:
558 		dprintk(verbose, DST_CA_INFO, 1, " Getting message");
559 		result = ca_get_message(state, p_ca_message, arg);
560 		if (result < 0) {
561 			dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_MSG Failed !");
562 			goto free_mem_and_exit;
563 		}
564 		dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_MSG Success !");
565 		break;
566 	case CA_RESET:
567 		dprintk(verbose, DST_CA_ERROR, 1, " Resetting DST");
568 		dst_error_bailout(state);
569 		msleep(4000);
570 		break;
571 	case CA_GET_SLOT_INFO:
572 		dprintk(verbose, DST_CA_INFO, 1, " Getting Slot info");
573 		result = ca_get_slot_info(state, p_ca_slot_info, arg);
574 		if (result < 0) {
575 			dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_SLOT_INFO Failed !");
576 			result = -1;
577 			goto free_mem_and_exit;
578 		}
579 		dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_SLOT_INFO Success !");
580 		break;
581 	case CA_GET_CAP:
582 		dprintk(verbose, DST_CA_INFO, 1, " Getting Slot capabilities");
583 		result = ca_get_slot_caps(state, p_ca_caps, arg);
584 		if (result < 0) {
585 			dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_CAP Failed !");
586 			goto free_mem_and_exit;
587 		}
588 		dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_CAP Success !");
589 		break;
590 	case CA_GET_DESCR_INFO:
591 		dprintk(verbose, DST_CA_INFO, 1, " Getting descrambler description");
592 		result = ca_get_slot_descr(state, p_ca_message, arg);
593 		if (result < 0) {
594 			dprintk(verbose, DST_CA_ERROR, 1, " -->CA_GET_DESCR_INFO Failed !");
595 			goto free_mem_and_exit;
596 		}
597 		dprintk(verbose, DST_CA_INFO, 1, " -->CA_GET_DESCR_INFO Success !");
598 		break;
599 	default:
600 		result = -EOPNOTSUPP;
601 	}
602  free_mem_and_exit:
603 	kfree (p_ca_message);
604 	kfree (p_ca_slot_info);
605 	kfree (p_ca_caps);
606 
607 	mutex_unlock(&dst_ca_mutex);
608 	return result;
609 }
610 
dst_ca_open(struct inode * inode,struct file * file)611 static int dst_ca_open(struct inode *inode, struct file *file)
612 {
613 	dprintk(verbose, DST_CA_DEBUG, 1, " Device opened [%p] ", file);
614 
615 	return 0;
616 }
617 
dst_ca_release(struct inode * inode,struct file * file)618 static int dst_ca_release(struct inode *inode, struct file *file)
619 {
620 	dprintk(verbose, DST_CA_DEBUG, 1, " Device closed.");
621 
622 	return 0;
623 }
624 
dst_ca_read(struct file * file,char __user * buffer,size_t length,loff_t * offset)625 static ssize_t dst_ca_read(struct file *file, char __user *buffer, size_t length, loff_t *offset)
626 {
627 	dprintk(verbose, DST_CA_DEBUG, 1, " Device read.");
628 
629 	return 0;
630 }
631 
dst_ca_write(struct file * file,const char __user * buffer,size_t length,loff_t * offset)632 static ssize_t dst_ca_write(struct file *file, const char __user *buffer, size_t length, loff_t *offset)
633 {
634 	dprintk(verbose, DST_CA_DEBUG, 1, " Device write.");
635 
636 	return 0;
637 }
638 
639 static const struct file_operations dst_ca_fops = {
640 	.owner = THIS_MODULE,
641 	.unlocked_ioctl = dst_ca_ioctl,
642 	.open = dst_ca_open,
643 	.release = dst_ca_release,
644 	.read = dst_ca_read,
645 	.write = dst_ca_write,
646 	.llseek = noop_llseek,
647 };
648 
649 static struct dvb_device dvbdev_ca = {
650 	.priv = NULL,
651 	.users = 1,
652 	.readers = 1,
653 	.writers = 1,
654 	.fops = &dst_ca_fops
655 };
656 
dst_ca_attach(struct dst_state * dst,struct dvb_adapter * dvb_adapter)657 struct dvb_device *dst_ca_attach(struct dst_state *dst, struct dvb_adapter *dvb_adapter)
658 {
659 	struct dvb_device *dvbdev;
660 
661 	dprintk(verbose, DST_CA_ERROR, 1, "registering DST-CA device");
662 	if (dvb_register_device(dvb_adapter, &dvbdev, &dvbdev_ca, dst,
663 				DVB_DEVICE_CA, 0) == 0) {
664 		dst->dst_ca = dvbdev;
665 		return dst->dst_ca;
666 	}
667 
668 	return NULL;
669 }
670 
671 EXPORT_SYMBOL_GPL(dst_ca_attach);
672 
673 MODULE_DESCRIPTION("DST DVB-S/T/C Combo CA driver");
674 MODULE_AUTHOR("Manu Abraham");
675 MODULE_LICENSE("GPL");
676