1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * CIMaX SP2/SP2HF (Atmel T90FJR) CI driver
4 *
5 * Copyright (C) 2014 Olli Salonen <olli.salonen@iki.fi>
6 *
7 * Heavily based on CIMax2(R) SP2 driver in conjunction with NetUp Dual
8 * DVB-S2 CI card (cimax2) with following copyrights:
9 *
10 * Copyright (C) 2009 NetUP Inc.
11 * Copyright (C) 2009 Igor M. Liplianin <liplianin@netup.ru>
12 * Copyright (C) 2009 Abylay Ospan <aospan@netup.ru>
13 */
14
15 #include "sp2_priv.h"
16
sp2_read_i2c(struct sp2 * s,u8 reg,u8 * buf,int len)17 static int sp2_read_i2c(struct sp2 *s, u8 reg, u8 *buf, int len)
18 {
19 int ret;
20 struct i2c_client *client = s->client;
21 struct i2c_adapter *adap = client->adapter;
22 struct i2c_msg msg[] = {
23 {
24 .addr = client->addr,
25 .flags = 0,
26 .buf = ®,
27 .len = 1
28 }, {
29 .addr = client->addr,
30 .flags = I2C_M_RD,
31 .buf = buf,
32 .len = len
33 }
34 };
35
36 ret = i2c_transfer(adap, msg, 2);
37
38 if (ret != 2) {
39 dev_err(&client->dev, "i2c read error, reg = 0x%02x, status = %d\n",
40 reg, ret);
41 if (ret < 0)
42 return ret;
43 else
44 return -EIO;
45 }
46
47 dev_dbg(&s->client->dev, "addr=0x%04x, reg = 0x%02x, data = %02x\n",
48 client->addr, reg, buf[0]);
49
50 return 0;
51 }
52
sp2_write_i2c(struct sp2 * s,u8 reg,u8 * buf,int len)53 static int sp2_write_i2c(struct sp2 *s, u8 reg, u8 *buf, int len)
54 {
55 int ret;
56 u8 buffer[35];
57 struct i2c_client *client = s->client;
58 struct i2c_adapter *adap = client->adapter;
59 struct i2c_msg msg = {
60 .addr = client->addr,
61 .flags = 0,
62 .buf = &buffer[0],
63 .len = len + 1
64 };
65
66 if ((len + 1) > sizeof(buffer)) {
67 dev_err(&client->dev, "i2c wr reg=%02x: len=%d is too big!\n",
68 reg, len);
69 return -EINVAL;
70 }
71
72 buffer[0] = reg;
73 memcpy(&buffer[1], buf, len);
74
75 ret = i2c_transfer(adap, &msg, 1);
76
77 if (ret != 1) {
78 dev_err(&client->dev, "i2c write error, reg = 0x%02x, status = %d\n",
79 reg, ret);
80 if (ret < 0)
81 return ret;
82 else
83 return -EIO;
84 }
85
86 dev_dbg(&s->client->dev, "addr=0x%04x, reg = 0x%02x, data = %*ph\n",
87 client->addr, reg, len, buf);
88
89 return 0;
90 }
91
sp2_ci_op_cam(struct dvb_ca_en50221 * en50221,int slot,u8 acs,u8 read,int addr,u8 data)92 static int sp2_ci_op_cam(struct dvb_ca_en50221 *en50221, int slot, u8 acs,
93 u8 read, int addr, u8 data)
94 {
95 struct sp2 *s = en50221->data;
96 u8 store;
97 int mem, ret;
98 int (*ci_op_cam)(void*, u8, int, u8, int*) = s->ci_control;
99
100 if (slot != 0)
101 return -EINVAL;
102
103 /*
104 * change module access type between IO space and attribute memory
105 * when needed
106 */
107 if (s->module_access_type != acs) {
108 ret = sp2_read_i2c(s, 0x00, &store, 1);
109
110 if (ret)
111 return ret;
112
113 store &= ~(SP2_MOD_CTL_ACS1 | SP2_MOD_CTL_ACS0);
114 store |= acs;
115
116 ret = sp2_write_i2c(s, 0x00, &store, 1);
117 if (ret)
118 return ret;
119 }
120
121 s->module_access_type = acs;
122
123 /* implementation of ci_op_cam is device specific */
124 if (ci_op_cam) {
125 ret = ci_op_cam(s->priv, read, addr, data, &mem);
126 } else {
127 dev_err(&s->client->dev, "callback not defined");
128 return -EINVAL;
129 }
130
131 if (ret)
132 return ret;
133
134 dev_dbg(&s->client->dev, "%s: slot=%d, addr=0x%04x, %s, data=%x",
135 (read) ? "read" : "write", slot, addr,
136 (acs == SP2_CI_ATTR_ACS) ? "attr" : "io",
137 (read) ? mem : data);
138
139 if (read)
140 return mem;
141 else
142 return 0;
143
144 }
145
sp2_ci_read_attribute_mem(struct dvb_ca_en50221 * en50221,int slot,int addr)146 int sp2_ci_read_attribute_mem(struct dvb_ca_en50221 *en50221,
147 int slot, int addr)
148 {
149 return sp2_ci_op_cam(en50221, slot, SP2_CI_ATTR_ACS,
150 SP2_CI_RD, addr, 0);
151 }
152
sp2_ci_write_attribute_mem(struct dvb_ca_en50221 * en50221,int slot,int addr,u8 data)153 int sp2_ci_write_attribute_mem(struct dvb_ca_en50221 *en50221,
154 int slot, int addr, u8 data)
155 {
156 return sp2_ci_op_cam(en50221, slot, SP2_CI_ATTR_ACS,
157 SP2_CI_WR, addr, data);
158 }
159
sp2_ci_read_cam_control(struct dvb_ca_en50221 * en50221,int slot,u8 addr)160 int sp2_ci_read_cam_control(struct dvb_ca_en50221 *en50221,
161 int slot, u8 addr)
162 {
163 return sp2_ci_op_cam(en50221, slot, SP2_CI_IO_ACS,
164 SP2_CI_RD, addr, 0);
165 }
166
sp2_ci_write_cam_control(struct dvb_ca_en50221 * en50221,int slot,u8 addr,u8 data)167 int sp2_ci_write_cam_control(struct dvb_ca_en50221 *en50221,
168 int slot, u8 addr, u8 data)
169 {
170 return sp2_ci_op_cam(en50221, slot, SP2_CI_IO_ACS,
171 SP2_CI_WR, addr, data);
172 }
173
sp2_ci_slot_reset(struct dvb_ca_en50221 * en50221,int slot)174 int sp2_ci_slot_reset(struct dvb_ca_en50221 *en50221, int slot)
175 {
176 struct sp2 *s = en50221->data;
177 u8 buf;
178 int ret;
179
180 dev_dbg(&s->client->dev, "slot: %d\n", slot);
181
182 if (slot != 0)
183 return -EINVAL;
184
185 /* RST on */
186 buf = SP2_MOD_CTL_RST;
187 ret = sp2_write_i2c(s, 0x00, &buf, 1);
188
189 if (ret)
190 return ret;
191
192 usleep_range(500, 600);
193
194 /* RST off */
195 buf = 0x00;
196 ret = sp2_write_i2c(s, 0x00, &buf, 1);
197
198 if (ret)
199 return ret;
200
201 msleep(1000);
202
203 return 0;
204 }
205
sp2_ci_slot_shutdown(struct dvb_ca_en50221 * en50221,int slot)206 int sp2_ci_slot_shutdown(struct dvb_ca_en50221 *en50221, int slot)
207 {
208 struct sp2 *s = en50221->data;
209
210 dev_dbg(&s->client->dev, "slot:%d\n", slot);
211
212 /* not implemented */
213 return 0;
214 }
215
sp2_ci_slot_ts_enable(struct dvb_ca_en50221 * en50221,int slot)216 int sp2_ci_slot_ts_enable(struct dvb_ca_en50221 *en50221, int slot)
217 {
218 struct sp2 *s = en50221->data;
219 u8 buf;
220
221 dev_dbg(&s->client->dev, "slot:%d\n", slot);
222
223 if (slot != 0)
224 return -EINVAL;
225
226 sp2_read_i2c(s, 0x00, &buf, 1);
227
228 /* disable bypass and enable TS */
229 buf |= (SP2_MOD_CTL_TSOEN | SP2_MOD_CTL_TSIEN);
230 return sp2_write_i2c(s, 0, &buf, 1);
231 }
232
sp2_ci_poll_slot_status(struct dvb_ca_en50221 * en50221,int slot,int open)233 int sp2_ci_poll_slot_status(struct dvb_ca_en50221 *en50221,
234 int slot, int open)
235 {
236 struct sp2 *s = en50221->data;
237 u8 buf[2];
238 int ret;
239
240 dev_dbg(&s->client->dev, "slot:%d open:%d\n", slot, open);
241
242 /*
243 * CAM module INSERT/REMOVE processing. Slow operation because of i2c
244 * transfers. Throttle read to one per sec.
245 */
246 if (time_after(jiffies, s->next_status_checked_time)) {
247 ret = sp2_read_i2c(s, 0x00, buf, 1);
248 s->next_status_checked_time = jiffies + msecs_to_jiffies(1000);
249
250 if (ret)
251 return 0;
252
253 if (buf[0] & SP2_MOD_CTL_DET)
254 s->status = DVB_CA_EN50221_POLL_CAM_PRESENT |
255 DVB_CA_EN50221_POLL_CAM_READY;
256 else
257 s->status = 0;
258 }
259
260 return s->status;
261 }
262
sp2_init(struct sp2 * s)263 static int sp2_init(struct sp2 *s)
264 {
265 int ret = 0;
266 u8 buf;
267 u8 cimax_init[34] = {
268 0x00, /* module A control*/
269 0x00, /* auto select mask high A */
270 0x00, /* auto select mask low A */
271 0x00, /* auto select pattern high A */
272 0x00, /* auto select pattern low A */
273 0x44, /* memory access time A, 600 ns */
274 0x00, /* invert input A */
275 0x00, /* RFU */
276 0x00, /* RFU */
277 0x00, /* module B control*/
278 0x00, /* auto select mask high B */
279 0x00, /* auto select mask low B */
280 0x00, /* auto select pattern high B */
281 0x00, /* auto select pattern low B */
282 0x44, /* memory access time B, 600 ns */
283 0x00, /* invert input B */
284 0x00, /* RFU */
285 0x00, /* RFU */
286 0x00, /* auto select mask high Ext */
287 0x00, /* auto select mask low Ext */
288 0x00, /* auto select pattern high Ext */
289 0x00, /* auto select pattern low Ext */
290 0x00, /* RFU */
291 0x02, /* destination - module A */
292 0x01, /* power control reg, VCC power on */
293 0x00, /* RFU */
294 0x00, /* int status read only */
295 0x00, /* Interrupt Mask Register */
296 0x05, /* EXTINT=active-high, INT=push-pull */
297 0x00, /* USCG1 */
298 0x04, /* ack active low */
299 0x00, /* LOCK = 0 */
300 0x22, /* unknown */
301 0x00, /* synchronization? */
302 };
303
304 dev_dbg(&s->client->dev, "\n");
305
306 s->ca.owner = THIS_MODULE;
307 s->ca.read_attribute_mem = sp2_ci_read_attribute_mem;
308 s->ca.write_attribute_mem = sp2_ci_write_attribute_mem;
309 s->ca.read_cam_control = sp2_ci_read_cam_control;
310 s->ca.write_cam_control = sp2_ci_write_cam_control;
311 s->ca.slot_reset = sp2_ci_slot_reset;
312 s->ca.slot_shutdown = sp2_ci_slot_shutdown;
313 s->ca.slot_ts_enable = sp2_ci_slot_ts_enable;
314 s->ca.poll_slot_status = sp2_ci_poll_slot_status;
315 s->ca.data = s;
316 s->module_access_type = 0;
317
318 /* initialize all regs */
319 ret = sp2_write_i2c(s, 0x00, &cimax_init[0], 34);
320 if (ret)
321 goto err;
322
323 /* lock registers */
324 buf = 1;
325 ret = sp2_write_i2c(s, 0x1f, &buf, 1);
326 if (ret)
327 goto err;
328
329 /* power on slots */
330 ret = sp2_write_i2c(s, 0x18, &buf, 1);
331 if (ret)
332 goto err;
333
334 ret = dvb_ca_en50221_init(s->dvb_adap, &s->ca, 0, 1);
335 if (ret)
336 goto err;
337
338 return 0;
339
340 err:
341 dev_dbg(&s->client->dev, "init failed=%d\n", ret);
342 return ret;
343 }
344
sp2_exit(struct i2c_client * client)345 static int sp2_exit(struct i2c_client *client)
346 {
347 struct sp2 *s;
348
349 dev_dbg(&client->dev, "\n");
350
351 if (!client)
352 return 0;
353
354 s = i2c_get_clientdata(client);
355 if (!s)
356 return 0;
357
358 if (!s->ca.data)
359 return 0;
360
361 dvb_ca_en50221_release(&s->ca);
362
363 return 0;
364 }
365
sp2_probe(struct i2c_client * client)366 static int sp2_probe(struct i2c_client *client)
367 {
368 struct sp2_config *cfg = client->dev.platform_data;
369 struct sp2 *s;
370 int ret;
371
372 dev_dbg(&client->dev, "\n");
373
374 s = kzalloc(sizeof(*s), GFP_KERNEL);
375 if (!s) {
376 ret = -ENOMEM;
377 goto err;
378 }
379
380 s->client = client;
381 s->dvb_adap = cfg->dvb_adap;
382 s->priv = cfg->priv;
383 s->ci_control = cfg->ci_control;
384
385 i2c_set_clientdata(client, s);
386
387 ret = sp2_init(s);
388 if (ret)
389 goto err;
390
391 dev_info(&s->client->dev, "CIMaX SP2 successfully attached\n");
392 return 0;
393 err:
394 dev_dbg(&client->dev, "init failed=%d\n", ret);
395 kfree(s);
396
397 return ret;
398 }
399
sp2_remove(struct i2c_client * client)400 static void sp2_remove(struct i2c_client *client)
401 {
402 struct sp2 *s = i2c_get_clientdata(client);
403
404 dev_dbg(&client->dev, "\n");
405 sp2_exit(client);
406 kfree(s);
407 }
408
409 static const struct i2c_device_id sp2_id[] = {
410 {"sp2", 0},
411 {}
412 };
413 MODULE_DEVICE_TABLE(i2c, sp2_id);
414
415 static struct i2c_driver sp2_driver = {
416 .driver = {
417 .name = "sp2",
418 },
419 .probe = sp2_probe,
420 .remove = sp2_remove,
421 .id_table = sp2_id,
422 };
423
424 module_i2c_driver(sp2_driver);
425
426 MODULE_DESCRIPTION("CIMaX SP2/HF CI driver");
427 MODULE_AUTHOR("Olli Salonen <olli.salonen@iki.fi>");
428 MODULE_LICENSE("GPL");
429