2 * cxd2099.c: Driver for the CXD2099AR Common Interface Controller
4 * Copyright (C) 2010-2011 Digital Devices GmbH
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * version 2 only, as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
22 * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
25 #include <linux/slab.h>
26 #include <linux/kernel.h>
27 #include <linux/module.h>
28 #include <linux/i2c.h>
29 #include <linux/wait.h>
30 #include <linux/delay.h>
31 #include <linux/mutex.h>
36 #define MAX_BUFFER_SIZE 248
39 struct dvb_ca_en50221 en;
41 struct i2c_adapter *i2c;
42 struct cxd2099_cfg cfg;
60 static int i2c_write_reg(struct i2c_adapter *adapter, u8 adr,
63 u8 m[2] = {reg, data};
64 struct i2c_msg msg = {.addr = adr, .flags = 0, .buf = m, .len = 2};
66 if (i2c_transfer(adapter, &msg, 1) != 1) {
67 dev_err(&adapter->dev,
68 "Failed to write to I2C register %02x@%02x!\n",
75 static int i2c_write(struct i2c_adapter *adapter, u8 adr,
78 struct i2c_msg msg = {.addr = adr, .flags = 0, .buf = data, .len = len};
80 if (i2c_transfer(adapter, &msg, 1) != 1) {
81 dev_err(&adapter->dev, "Failed to write to I2C!\n");
87 static int i2c_read_reg(struct i2c_adapter *adapter, u8 adr,
90 struct i2c_msg msgs[2] = {{.addr = adr, .flags = 0,
91 .buf = ®, .len = 1},
92 {.addr = adr, .flags = I2C_M_RD,
93 .buf = val, .len = 1} };
95 if (i2c_transfer(adapter, msgs, 2) != 2) {
96 dev_err(&adapter->dev, "error in i2c_read_reg\n");
102 static int i2c_read(struct i2c_adapter *adapter, u8 adr,
103 u8 reg, u8 *data, u8 n)
105 struct i2c_msg msgs[2] = {{.addr = adr, .flags = 0,
106 .buf = ®, .len = 1},
107 {.addr = adr, .flags = I2C_M_RD,
108 .buf = data, .len = n} };
110 if (i2c_transfer(adapter, msgs, 2) != 2) {
111 dev_err(&adapter->dev, "error in i2c_read\n");
117 static int read_block(struct cxd *ci, u8 adr, u8 *data, u8 n)
121 status = i2c_write_reg(ci->i2c, ci->cfg.adr, 0, adr);
123 ci->lastaddress = adr;
124 status = i2c_read(ci->i2c, ci->cfg.adr, 1, data, n);
129 static int read_reg(struct cxd *ci, u8 reg, u8 *val)
131 return read_block(ci, reg, val, 1);
134 static int read_pccard(struct cxd *ci, u16 address, u8 *data, u8 n)
137 u8 addr[3] = {2, address & 0xff, address >> 8};
139 status = i2c_write(ci->i2c, ci->cfg.adr, addr, 3);
141 status = i2c_read(ci->i2c, ci->cfg.adr, 3, data, n);
145 static int write_pccard(struct cxd *ci, u16 address, u8 *data, u8 n)
148 u8 addr[3] = {2, address & 0xff, address >> 8};
150 status = i2c_write(ci->i2c, ci->cfg.adr, addr, 3);
154 memcpy(buf + 1, data, n);
155 status = i2c_write(ci->i2c, ci->cfg.adr, buf, n + 1);
160 static int read_io(struct cxd *ci, u16 address, u8 *val)
163 u8 addr[3] = {2, address & 0xff, address >> 8};
165 status = i2c_write(ci->i2c, ci->cfg.adr, addr, 3);
167 status = i2c_read(ci->i2c, ci->cfg.adr, 3, val, 1);
171 static int write_io(struct cxd *ci, u16 address, u8 val)
174 u8 addr[3] = {2, address & 0xff, address >> 8};
175 u8 buf[2] = {3, val};
177 status = i2c_write(ci->i2c, ci->cfg.adr, addr, 3);
179 status = i2c_write(ci->i2c, ci->cfg.adr, buf, 2);
183 static int write_regm(struct cxd *ci, u8 reg, u8 val, u8 mask)
187 status = i2c_write_reg(ci->i2c, ci->cfg.adr, 0, reg);
188 if (!status && reg >= 6 && reg <= 8 && mask != 0xff)
189 status = i2c_read_reg(ci->i2c, ci->cfg.adr, 1, &ci->regs[reg]);
190 ci->regs[reg] = (ci->regs[reg] & (~mask)) | val;
192 ci->lastaddress = reg;
193 status = i2c_write_reg(ci->i2c, ci->cfg.adr, 1, ci->regs[reg]);
196 ci->regs[reg] &= 0x7f;
200 static int write_reg(struct cxd *ci, u8 reg, u8 val)
202 return write_regm(ci, reg, val, 0xff);
206 static int write_block(struct cxd *ci, u8 adr, u8 *data, int n)
211 status = i2c_write_reg(ci->i2c, ci->cfg.adr, 0, adr);
213 ci->lastaddress = adr;
214 memcpy(buf + 1, data, n);
215 status = i2c_write(ci->i2c, ci->cfg.adr, buf, n + 1);
221 static void set_mode(struct cxd *ci, int mode)
223 if (mode == ci->mode)
227 case 0x00: /* IO mem */
228 write_regm(ci, 0x06, 0x00, 0x07);
230 case 0x01: /* ATT mem */
231 write_regm(ci, 0x06, 0x02, 0x07);
239 static void cam_mode(struct cxd *ci, int mode)
241 if (mode == ci->cammode)
246 write_regm(ci, 0x20, 0x80, 0x80);
250 if (!ci->en.read_data)
252 dev_info(&ci->i2c->dev, "enable cam buffer mode\n");
253 /* write_reg(ci, 0x0d, 0x00); */
254 /* write_reg(ci, 0x0e, 0x01); */
255 write_regm(ci, 0x08, 0x40, 0x40);
256 /* read_reg(ci, 0x12, &dummy); */
257 write_regm(ci, 0x08, 0x80, 0x80);
266 static int init(struct cxd *ci)
270 mutex_lock(&ci->lock);
273 status = write_reg(ci, 0x00, 0x00);
276 status = write_reg(ci, 0x01, 0x00);
279 status = write_reg(ci, 0x02, 0x10);
282 status = write_reg(ci, 0x03, 0x00);
285 status = write_reg(ci, 0x05, 0xFF);
288 status = write_reg(ci, 0x06, 0x1F);
291 status = write_reg(ci, 0x07, 0x1F);
294 status = write_reg(ci, 0x08, 0x28);
297 status = write_reg(ci, 0x14, 0x20);
301 /* TOSTRT = 8, Mode B (gated clock), falling Edge,
302 * Serial, POL=HIGH, MSB
304 status = write_reg(ci, 0x0A, 0xA7);
308 status = write_reg(ci, 0x0B, 0x33);
311 status = write_reg(ci, 0x0C, 0x33);
315 status = write_regm(ci, 0x14, 0x00, 0x0F);
318 status = write_reg(ci, 0x15, ci->clk_reg_b);
321 status = write_regm(ci, 0x16, 0x00, 0x0F);
324 status = write_reg(ci, 0x17, ci->clk_reg_f);
328 if (ci->cfg.clock_mode) {
329 if (ci->cfg.polarity) {
330 status = write_reg(ci, 0x09, 0x6f);
334 status = write_reg(ci, 0x09, 0x6d);
338 status = write_reg(ci, 0x20, 0x68);
341 status = write_reg(ci, 0x21, 0x00);
344 status = write_reg(ci, 0x22, 0x02);
348 if (ci->cfg.polarity) {
349 status = write_reg(ci, 0x09, 0x4f);
353 status = write_reg(ci, 0x09, 0x4d);
358 status = write_reg(ci, 0x20, 0x28);
361 status = write_reg(ci, 0x21, 0x00);
364 status = write_reg(ci, 0x22, 0x07);
369 status = write_regm(ci, 0x20, 0x80, 0x80);
372 status = write_regm(ci, 0x03, 0x02, 0x02);
375 status = write_reg(ci, 0x01, 0x04);
378 status = write_reg(ci, 0x00, 0x31);
382 /* Put TS in bypass */
383 status = write_regm(ci, 0x09, 0x08, 0x08);
389 mutex_unlock(&ci->lock);
394 static int read_attribute_mem(struct dvb_ca_en50221 *ca,
395 int slot, int address)
397 struct cxd *ci = ca->data;
400 mutex_lock(&ci->lock);
402 read_pccard(ci, address, &val, 1);
403 mutex_unlock(&ci->lock);
404 /* printk(KERN_INFO "%02x:%02x\n", address,val); */
408 static int write_attribute_mem(struct dvb_ca_en50221 *ca, int slot,
409 int address, u8 value)
411 struct cxd *ci = ca->data;
413 mutex_lock(&ci->lock);
415 write_pccard(ci, address, &value, 1);
416 mutex_unlock(&ci->lock);
420 static int read_cam_control(struct dvb_ca_en50221 *ca,
421 int slot, u8 address)
423 struct cxd *ci = ca->data;
426 mutex_lock(&ci->lock);
428 read_io(ci, address, &val);
429 mutex_unlock(&ci->lock);
433 static int write_cam_control(struct dvb_ca_en50221 *ca, int slot,
434 u8 address, u8 value)
436 struct cxd *ci = ca->data;
438 mutex_lock(&ci->lock);
440 write_io(ci, address, value);
441 mutex_unlock(&ci->lock);
445 static int slot_reset(struct dvb_ca_en50221 *ca, int slot)
447 struct cxd *ci = ca->data;
449 mutex_lock(&ci->lock);
451 write_reg(ci, 0x00, 0x21);
452 write_reg(ci, 0x06, 0x1F);
453 write_reg(ci, 0x00, 0x31);
454 write_regm(ci, 0x20, 0x80, 0x80);
455 write_reg(ci, 0x03, 0x02);
461 for (i = 0; i < 100; i++) {
462 usleep_range(10000, 11000);
467 mutex_unlock(&ci->lock);
472 static int slot_shutdown(struct dvb_ca_en50221 *ca, int slot)
474 struct cxd *ci = ca->data;
476 dev_info(&ci->i2c->dev, "%s\n", __func__);
477 mutex_lock(&ci->lock);
478 write_regm(ci, 0x09, 0x08, 0x08);
479 write_regm(ci, 0x20, 0x80, 0x80); /* Reset CAM Mode */
480 write_regm(ci, 0x06, 0x07, 0x07); /* Clear IO Mode */
482 mutex_unlock(&ci->lock);
486 static int slot_ts_enable(struct dvb_ca_en50221 *ca, int slot)
488 struct cxd *ci = ca->data;
490 mutex_lock(&ci->lock);
491 write_regm(ci, 0x09, 0x00, 0x08);
496 mutex_unlock(&ci->lock);
500 static int campoll(struct cxd *ci)
504 read_reg(ci, 0x04, &istat);
507 write_reg(ci, 0x05, istat);
511 dev_info(&ci->i2c->dev, "DR\n");
514 dev_info(&ci->i2c->dev, "WC\n");
519 read_reg(ci, 0x01, &slotstat);
520 if (!(2 & slotstat)) {
521 if (!ci->slot_stat) {
522 ci->slot_stat = DVB_CA_EN50221_POLL_CAM_PRESENT;
523 write_regm(ci, 0x03, 0x08, 0x08);
529 write_regm(ci, 0x03, 0x00, 0x08);
530 dev_info(&ci->i2c->dev, "NO CAM\n");
535 ci->slot_stat == DVB_CA_EN50221_POLL_CAM_PRESENT) {
537 ci->slot_stat |= DVB_CA_EN50221_POLL_CAM_READY;
543 static int poll_slot_status(struct dvb_ca_en50221 *ca, int slot, int open)
545 struct cxd *ci = ca->data;
548 mutex_lock(&ci->lock);
550 read_reg(ci, 0x01, &slotstat);
551 mutex_unlock(&ci->lock);
553 return ci->slot_stat;
557 static int read_data(struct dvb_ca_en50221 *ca, int slot, u8 *ebuf, int ecount)
559 struct cxd *ci = ca->data;
563 mutex_lock(&ci->lock);
565 mutex_unlock(&ci->lock);
567 dev_info(&ci->i2c->dev, "%s\n", __func__);
571 mutex_lock(&ci->lock);
572 read_reg(ci, 0x0f, &msb);
573 read_reg(ci, 0x10, &lsb);
574 len = (msb << 8) | lsb;
575 read_block(ci, 0x12, ebuf, len);
577 mutex_unlock(&ci->lock);
582 static int write_data(struct dvb_ca_en50221 *ca, int slot, u8 *ebuf, int ecount)
584 struct cxd *ci = ca->data;
586 mutex_lock(&ci->lock);
587 dev_info(&ci->i2c->dev, "%s %d\n", __func__, ecount);
588 write_reg(ci, 0x0d, ecount >> 8);
589 write_reg(ci, 0x0e, ecount & 0xff);
590 write_block(ci, 0x11, ebuf, ecount);
591 mutex_unlock(&ci->lock);
596 static struct dvb_ca_en50221 en_templ = {
597 .read_attribute_mem = read_attribute_mem,
598 .write_attribute_mem = write_attribute_mem,
599 .read_cam_control = read_cam_control,
600 .write_cam_control = write_cam_control,
601 .slot_reset = slot_reset,
602 .slot_shutdown = slot_shutdown,
603 .slot_ts_enable = slot_ts_enable,
604 .poll_slot_status = poll_slot_status,
606 .read_data = read_data,
607 .write_data = write_data,
612 struct dvb_ca_en50221 *cxd2099_attach(struct cxd2099_cfg *cfg,
614 struct i2c_adapter *i2c)
619 if (i2c_read_reg(i2c, cfg->adr, 0, &val) < 0) {
620 dev_info(&i2c->dev, "No CXD2099 detected at %02x\n", cfg->adr);
624 ci = kzalloc(sizeof(*ci), GFP_KERNEL);
628 mutex_init(&ci->lock);
631 ci->lastaddress = 0xff;
632 ci->clk_reg_b = 0x4a;
633 ci->clk_reg_f = 0x1b;
638 dev_info(&i2c->dev, "Attached CXD2099AR at %02x\n", ci->cfg.adr);
641 EXPORT_SYMBOL(cxd2099_attach);
643 MODULE_DESCRIPTION("cxd2099");
644 MODULE_AUTHOR("Ralph Metzler");
645 MODULE_LICENSE("GPL");