1 // SPDX-License-Identifier: GPL-2.0
3 * cxd2099.c: Driver for the Sony CXD2099AR Common Interface Controller
5 * Copyright (C) 2010-2013 Digital Devices GmbH
8 #include <linux/slab.h>
9 #include <linux/kernel.h>
10 #include <linux/module.h>
11 #include <linux/i2c.h>
12 #include <linux/regmap.h>
13 #include <linux/wait.h>
14 #include <linux/delay.h>
15 #include <linux/mutex.h>
20 static int buffermode;
21 module_param(buffermode, int, 0444);
22 MODULE_PARM_DESC(buffermode, "Enable CXD2099AR buffer mode (default: disabled)");
24 static int read_data(struct dvb_ca_en50221 *ca, int slot, u8 *ebuf, int ecount);
27 struct dvb_ca_en50221 en;
29 struct cxd2099_cfg cfg;
30 struct i2c_client *client;
31 struct regmap *regmap;
47 struct mutex lock; /* device access lock */
53 static int read_block(struct cxd *ci, u8 adr, u8 *data, u16 n)
57 if (ci->lastaddress != adr)
58 status = regmap_write(ci->regmap, 0, adr);
60 ci->lastaddress = adr;
65 if (ci->cfg.max_i2c && len > ci->cfg.max_i2c)
66 len = ci->cfg.max_i2c;
67 status = regmap_raw_read(ci->regmap, 1, data, len);
77 static int read_reg(struct cxd *ci, u8 reg, u8 *val)
79 return read_block(ci, reg, val, 1);
82 static int read_pccard(struct cxd *ci, u16 address, u8 *data, u8 n)
85 u8 addr[2] = {address & 0xff, address >> 8};
87 status = regmap_raw_write(ci->regmap, 2, addr, 2);
89 status = regmap_raw_read(ci->regmap, 3, data, n);
93 static int write_pccard(struct cxd *ci, u16 address, u8 *data, u8 n)
96 u8 addr[2] = {address & 0xff, address >> 8};
98 status = regmap_raw_write(ci->regmap, 2, addr, 2);
102 memcpy(buf, data, n);
103 status = regmap_raw_write(ci->regmap, 3, buf, n);
108 static int read_io(struct cxd *ci, u16 address, unsigned int *val)
111 u8 addr[2] = {address & 0xff, address >> 8};
113 status = regmap_raw_write(ci->regmap, 2, addr, 2);
115 status = regmap_read(ci->regmap, 3, val);
119 static int write_io(struct cxd *ci, u16 address, u8 val)
122 u8 addr[2] = {address & 0xff, address >> 8};
124 status = regmap_raw_write(ci->regmap, 2, addr, 2);
126 status = regmap_write(ci->regmap, 3, val);
130 static int write_regm(struct cxd *ci, u8 reg, u8 val, u8 mask)
135 if (ci->lastaddress != reg)
136 status = regmap_write(ci->regmap, 0, reg);
137 if (!status && reg >= 6 && reg <= 8 && mask != 0xff) {
138 status = regmap_read(ci->regmap, 1, ®val);
139 ci->regs[reg] = regval;
141 ci->lastaddress = reg;
142 ci->regs[reg] = (ci->regs[reg] & (~mask)) | val;
144 status = regmap_write(ci->regmap, 1, ci->regs[reg]);
146 ci->regs[reg] &= 0x7f;
150 static int write_reg(struct cxd *ci, u8 reg, u8 val)
152 return write_regm(ci, reg, val, 0xff);
155 static int write_block(struct cxd *ci, u8 adr, u8 *data, u16 n)
160 if (ci->lastaddress != adr)
161 status = regmap_write(ci->regmap, 0, adr);
165 ci->lastaddress = adr;
169 if (ci->cfg.max_i2c && (len + 1 > ci->cfg.max_i2c))
170 len = ci->cfg.max_i2c - 1;
171 memcpy(buf, data, len);
172 status = regmap_raw_write(ci->regmap, 1, buf, len);
181 static void set_mode(struct cxd *ci, int mode)
183 if (mode == ci->mode)
187 case 0x00: /* IO mem */
188 write_regm(ci, 0x06, 0x00, 0x07);
190 case 0x01: /* ATT mem */
191 write_regm(ci, 0x06, 0x02, 0x07);
199 static void cam_mode(struct cxd *ci, int mode)
203 if (mode == ci->cammode)
208 write_regm(ci, 0x20, 0x80, 0x80);
211 if (!ci->en.read_data)
214 dev_info(&ci->client->dev, "enable cam buffer mode\n");
215 write_reg(ci, 0x0d, 0x00);
216 write_reg(ci, 0x0e, 0x01);
217 write_regm(ci, 0x08, 0x40, 0x40);
218 read_reg(ci, 0x12, &dummy);
219 write_regm(ci, 0x08, 0x80, 0x80);
227 static int init(struct cxd *ci)
231 mutex_lock(&ci->lock);
234 status = write_reg(ci, 0x00, 0x00);
237 status = write_reg(ci, 0x01, 0x00);
240 status = write_reg(ci, 0x02, 0x10);
243 status = write_reg(ci, 0x03, 0x00);
246 status = write_reg(ci, 0x05, 0xFF);
249 status = write_reg(ci, 0x06, 0x1F);
252 status = write_reg(ci, 0x07, 0x1F);
255 status = write_reg(ci, 0x08, 0x28);
258 status = write_reg(ci, 0x14, 0x20);
262 /* TOSTRT = 8, Mode B (gated clock), falling Edge,
263 * Serial, POL=HIGH, MSB
265 status = write_reg(ci, 0x0A, 0xA7);
269 status = write_reg(ci, 0x0B, 0x33);
272 status = write_reg(ci, 0x0C, 0x33);
276 status = write_regm(ci, 0x14, 0x00, 0x0F);
279 status = write_reg(ci, 0x15, ci->clk_reg_b);
282 status = write_regm(ci, 0x16, 0x00, 0x0F);
285 status = write_reg(ci, 0x17, ci->clk_reg_f);
289 if (ci->cfg.clock_mode == 2) {
290 /* bitrate*2^13/ 72000 */
291 u32 reg = ((ci->cfg.bitrate << 13) + 71999) / 72000;
293 if (ci->cfg.polarity) {
294 status = write_reg(ci, 0x09, 0x6f);
298 status = write_reg(ci, 0x09, 0x6d);
302 status = write_reg(ci, 0x20, 0x08);
305 status = write_reg(ci, 0x21, (reg >> 8) & 0xff);
308 status = write_reg(ci, 0x22, reg & 0xff);
311 } else if (ci->cfg.clock_mode == 1) {
312 if (ci->cfg.polarity) {
313 status = write_reg(ci, 0x09, 0x6f); /* D */
317 status = write_reg(ci, 0x09, 0x6d);
321 status = write_reg(ci, 0x20, 0x68);
324 status = write_reg(ci, 0x21, 0x00);
327 status = write_reg(ci, 0x22, 0x02);
331 if (ci->cfg.polarity) {
332 status = write_reg(ci, 0x09, 0x4f); /* C */
336 status = write_reg(ci, 0x09, 0x4d);
340 status = write_reg(ci, 0x20, 0x28);
343 status = write_reg(ci, 0x21, 0x00);
346 status = write_reg(ci, 0x22, 0x07);
351 status = write_regm(ci, 0x20, 0x80, 0x80);
354 status = write_regm(ci, 0x03, 0x02, 0x02);
357 status = write_reg(ci, 0x01, 0x04);
360 status = write_reg(ci, 0x00, 0x31);
364 /* Put TS in bypass */
365 status = write_regm(ci, 0x09, 0x08, 0x08);
371 mutex_unlock(&ci->lock);
376 static int read_attribute_mem(struct dvb_ca_en50221 *ca,
377 int slot, int address)
379 struct cxd *ci = ca->data;
382 mutex_lock(&ci->lock);
384 read_pccard(ci, address, &val, 1);
385 mutex_unlock(&ci->lock);
389 static int write_attribute_mem(struct dvb_ca_en50221 *ca, int slot,
390 int address, u8 value)
392 struct cxd *ci = ca->data;
394 mutex_lock(&ci->lock);
396 write_pccard(ci, address, &value, 1);
397 mutex_unlock(&ci->lock);
401 static int read_cam_control(struct dvb_ca_en50221 *ca,
402 int slot, u8 address)
404 struct cxd *ci = ca->data;
407 mutex_lock(&ci->lock);
409 read_io(ci, address, &val);
410 mutex_unlock(&ci->lock);
414 static int write_cam_control(struct dvb_ca_en50221 *ca, int slot,
415 u8 address, u8 value)
417 struct cxd *ci = ca->data;
419 mutex_lock(&ci->lock);
421 write_io(ci, address, value);
422 mutex_unlock(&ci->lock);
426 static int slot_reset(struct dvb_ca_en50221 *ca, int slot)
428 struct cxd *ci = ca->data;
431 read_data(ca, slot, ci->rbuf, 0);
433 mutex_lock(&ci->lock);
435 write_reg(ci, 0x00, 0x21);
436 write_reg(ci, 0x06, 0x1F);
437 write_reg(ci, 0x00, 0x31);
438 write_regm(ci, 0x20, 0x80, 0x80);
439 write_reg(ci, 0x03, 0x02);
445 for (i = 0; i < 100; i++) {
446 usleep_range(10000, 11000);
451 mutex_unlock(&ci->lock);
455 static int slot_shutdown(struct dvb_ca_en50221 *ca, int slot)
457 struct cxd *ci = ca->data;
459 dev_dbg(&ci->client->dev, "%s\n", __func__);
461 read_data(ca, slot, ci->rbuf, 0);
462 mutex_lock(&ci->lock);
463 write_reg(ci, 0x00, 0x21);
464 write_reg(ci, 0x06, 0x1F);
467 write_regm(ci, 0x09, 0x08, 0x08);
468 write_regm(ci, 0x20, 0x80, 0x80); /* Reset CAM Mode */
469 write_regm(ci, 0x06, 0x07, 0x07); /* Clear IO Mode */
473 mutex_unlock(&ci->lock);
477 static int slot_ts_enable(struct dvb_ca_en50221 *ca, int slot)
479 struct cxd *ci = ca->data;
481 mutex_lock(&ci->lock);
482 write_regm(ci, 0x09, 0x00, 0x08);
485 mutex_unlock(&ci->lock);
489 static int campoll(struct cxd *ci)
493 read_reg(ci, 0x04, &istat);
496 write_reg(ci, 0x05, istat);
506 read_reg(ci, 0x01, &slotstat);
507 if (!(2 & slotstat)) {
508 if (!ci->slot_stat) {
510 DVB_CA_EN50221_POLL_CAM_PRESENT;
511 write_regm(ci, 0x03, 0x08, 0x08);
517 write_regm(ci, 0x03, 0x00, 0x08);
518 dev_info(&ci->client->dev, "NO CAM\n");
523 ci->slot_stat == DVB_CA_EN50221_POLL_CAM_PRESENT) {
525 ci->slot_stat |= DVB_CA_EN50221_POLL_CAM_READY;
531 static int poll_slot_status(struct dvb_ca_en50221 *ca, int slot, int open)
533 struct cxd *ci = ca->data;
536 mutex_lock(&ci->lock);
538 read_reg(ci, 0x01, &slotstat);
539 mutex_unlock(&ci->lock);
541 return ci->slot_stat;
544 static int read_data(struct dvb_ca_en50221 *ca, int slot, u8 *ebuf, int ecount)
546 struct cxd *ci = ca->data;
550 mutex_lock(&ci->lock);
552 mutex_unlock(&ci->lock);
557 mutex_lock(&ci->lock);
558 read_reg(ci, 0x0f, &msb);
559 read_reg(ci, 0x10, &lsb);
560 len = ((u16)msb << 8) | lsb;
561 if (len > ecount || len < 2) {
562 /* read it anyway or cxd may hang */
563 read_block(ci, 0x12, ci->rbuf, len);
564 mutex_unlock(&ci->lock);
567 read_block(ci, 0x12, ebuf, len);
569 mutex_unlock(&ci->lock);
573 static int write_data(struct dvb_ca_en50221 *ca, int slot, u8 *ebuf, int ecount)
575 struct cxd *ci = ca->data;
579 mutex_lock(&ci->lock);
580 write_reg(ci, 0x0d, ecount >> 8);
581 write_reg(ci, 0x0e, ecount & 0xff);
582 write_block(ci, 0x11, ebuf, ecount);
584 mutex_unlock(&ci->lock);
588 static const struct dvb_ca_en50221 en_templ = {
589 .read_attribute_mem = read_attribute_mem,
590 .write_attribute_mem = write_attribute_mem,
591 .read_cam_control = read_cam_control,
592 .write_cam_control = write_cam_control,
593 .slot_reset = slot_reset,
594 .slot_shutdown = slot_shutdown,
595 .slot_ts_enable = slot_ts_enable,
596 .poll_slot_status = poll_slot_status,
597 .read_data = read_data,
598 .write_data = write_data,
601 static int cxd2099_probe(struct i2c_client *client,
602 const struct i2c_device_id *id)
605 struct cxd2099_cfg *cfg = client->dev.platform_data;
606 static const struct regmap_config rm_cfg = {
613 ci = kzalloc(sizeof(*ci), GFP_KERNEL);
620 memcpy(&ci->cfg, cfg, sizeof(ci->cfg));
622 ci->regmap = regmap_init_i2c(client, &rm_cfg);
623 if (IS_ERR(ci->regmap)) {
624 ret = PTR_ERR(ci->regmap);
628 ret = regmap_read(ci->regmap, 0x00, &val);
630 dev_info(&client->dev, "No CXD2099AR detected at 0x%02x\n",
635 mutex_init(&ci->lock);
636 ci->lastaddress = 0xff;
637 ci->clk_reg_b = 0x4a;
638 ci->clk_reg_f = 0x1b;
643 dev_info(&client->dev, "Attached CXD2099AR at 0x%02x\n", client->addr);
648 ci->en.read_data = NULL;
649 ci->en.write_data = NULL;
651 dev_info(&client->dev, "Using CXD2099AR buffer mode");
654 i2c_set_clientdata(client, ci);
659 regmap_exit(ci->regmap);
667 static int cxd2099_remove(struct i2c_client *client)
669 struct cxd *ci = i2c_get_clientdata(client);
671 regmap_exit(ci->regmap);
677 static const struct i2c_device_id cxd2099_id[] = {
681 MODULE_DEVICE_TABLE(i2c, cxd2099_id);
683 static struct i2c_driver cxd2099_driver = {
687 .probe = cxd2099_probe,
688 .remove = cxd2099_remove,
689 .id_table = cxd2099_id,
692 module_i2c_driver(cxd2099_driver);
694 MODULE_DESCRIPTION("Sony CXD2099AR Common Interface controller driver");
695 MODULE_AUTHOR("Ralph Metzler");
696 MODULE_LICENSE("GPL v2");