2 * cxd2099.c: Driver for the CXD2099AR Common Interface Controller
4 * Copyright (C) 2010 DigitalDevices UG
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/version.h>
26 #include <linux/slab.h>
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/moduleparam.h>
30 #include <linux/init.h>
31 #include <linux/i2c.h>
32 #include <linux/wait.h>
33 #include <linux/delay.h>
34 #include <linux/mutex.h>
39 #define MAX_BUFFER_SIZE 248
42 struct dvb_ca_en50221 en;
44 struct i2c_adapter *i2c;
63 static int i2c_write_reg(struct i2c_adapter *adapter, u8 adr,
66 u8 m[2] = {reg, data};
67 struct i2c_msg msg = {.addr = adr, .flags = 0, .buf = m, .len = 2};
69 if (i2c_transfer(adapter, &msg, 1) != 1) {
70 printk(KERN_ERR "Failed to write to I2C register %02x@%02x!\n",
77 static int i2c_write(struct i2c_adapter *adapter, u8 adr,
80 struct i2c_msg msg = {.addr = adr, .flags = 0, .buf = data, .len = len};
82 if (i2c_transfer(adapter, &msg, 1) != 1) {
83 printk(KERN_ERR "Failed to write to I2C!\n");
89 static int i2c_read_reg(struct i2c_adapter *adapter, u8 adr,
92 struct i2c_msg msgs[2] = {{.addr = adr, .flags = 0,
93 .buf = ®, .len = 1 },
94 {.addr = adr, .flags = I2C_M_RD,
95 .buf = val, .len = 1 } };
97 if (i2c_transfer(adapter, msgs, 2) != 2) {
98 printk(KERN_ERR "error in i2c_read_reg\n");
104 static int i2c_read(struct i2c_adapter *adapter, u8 adr,
105 u8 reg, u8 *data, u8 n)
107 struct i2c_msg msgs[2] = {{.addr = adr, .flags = 0,
108 .buf = ®, .len = 1 },
109 {.addr = adr, .flags = I2C_M_RD,
110 .buf = data, .len = n } };
112 if (i2c_transfer(adapter, msgs, 2) != 2) {
113 printk(KERN_ERR "error in i2c_read\n");
119 static int read_block(struct cxd *ci, u8 adr, u8 *data, u8 n)
123 status = i2c_write_reg(ci->i2c, ci->adr, 0, adr);
125 ci->lastaddress = adr;
126 status = i2c_read(ci->i2c, ci->adr, 1, data, n);
131 static int read_reg(struct cxd *ci, u8 reg, u8 *val)
133 return read_block(ci, reg, val, 1);
137 static int read_pccard(struct cxd *ci, u16 address, u8 *data, u8 n)
140 u8 addr[3] = { 2, address&0xff, address>>8 };
142 status = i2c_write(ci->i2c, ci->adr, addr, 3);
144 status = i2c_read(ci->i2c, ci->adr, 3, data, n);
148 static int write_pccard(struct cxd *ci, u16 address, u8 *data, u8 n)
151 u8 addr[3] = { 2, address&0xff, address>>8 };
153 status = i2c_write(ci->i2c, ci->adr, addr, 3);
156 memcpy(buf+1, data, n);
157 status = i2c_write(ci->i2c, ci->adr, buf, n+1);
162 static int read_io(struct cxd *ci, u16 address, u8 *val)
165 u8 addr[3] = { 2, address&0xff, address>>8 };
167 status = i2c_write(ci->i2c, ci->adr, addr, 3);
169 status = i2c_read(ci->i2c, ci->adr, 3, val, 1);
173 static int write_io(struct cxd *ci, u16 address, u8 val)
176 u8 addr[3] = { 2, address&0xff, address>>8 };
177 u8 buf[2] = { 3, val };
179 status = i2c_write(ci->i2c, ci->adr, addr, 3);
181 status = i2c_write(ci->i2c, ci->adr, buf, 2);
187 static int write_regm(struct cxd *ci, u8 reg, u8 val, u8 mask)
191 status = i2c_write_reg(ci->i2c, ci->adr, 0, reg);
192 if (!status && reg >= 6 && reg <= 8 && mask != 0xff)
193 status = i2c_read_reg(ci->i2c, ci->adr, 1, &ci->regs[reg]);
194 ci->regs[reg] = (ci->regs[reg]&(~mask))|val;
196 ci->lastaddress = reg;
197 status = i2c_write_reg(ci->i2c, ci->adr, 1, ci->regs[reg]);
200 ci->regs[reg] &= 0x7f;
204 static int write_reg(struct cxd *ci, u8 reg, u8 val)
206 return write_regm(ci, reg, val, 0xff);
210 static int write_block(struct cxd *ci, u8 adr, u8 *data, int n)
215 status = i2c_write_reg(ci->i2c, ci->adr, 0, adr);
217 ci->lastaddress = adr;
218 memcpy(buf+1, data, n);
219 status = i2c_write(ci->i2c, ci->adr, buf, n+1);
225 static void set_mode(struct cxd *ci, int mode)
227 if (mode == ci->mode)
231 case 0x00: /* IO mem */
232 write_regm(ci, 0x06, 0x00, 0x07);
234 case 0x01: /* ATT mem */
235 write_regm(ci, 0x06, 0x02, 0x07);
243 static void cam_mode(struct cxd *ci, int mode)
245 if (mode == ci->cammode)
250 write_regm(ci, 0x20, 0x80, 0x80);
253 printk(KERN_INFO "enable cam buffer mode\n");
254 /* write_reg(ci, 0x0d, 0x00); */
255 /* write_reg(ci, 0x0e, 0x01); */
256 write_regm(ci, 0x08, 0x40, 0x40);
257 /* read_reg(ci, 0x12, &dummy); */
258 write_regm(ci, 0x08, 0x80, 0x80);
268 #define CHK_ERROR(s) if ((status = s)) break
270 static int init(struct cxd *ci)
274 mutex_lock(&ci->lock);
277 CHK_ERROR(write_reg(ci, 0x00, 0x00));
278 CHK_ERROR(write_reg(ci, 0x01, 0x00));
279 CHK_ERROR(write_reg(ci, 0x02, 0x10));
280 CHK_ERROR(write_reg(ci, 0x03, 0x00));
281 CHK_ERROR(write_reg(ci, 0x05, 0xFF));
282 CHK_ERROR(write_reg(ci, 0x06, 0x1F));
283 CHK_ERROR(write_reg(ci, 0x07, 0x1F));
284 CHK_ERROR(write_reg(ci, 0x08, 0x28));
285 CHK_ERROR(write_reg(ci, 0x14, 0x20));
287 CHK_ERROR(write_reg(ci, 0x09, 0x4D)); /* Input Mode C, BYPass Serial, TIVAL = low, MSB */
288 CHK_ERROR(write_reg(ci, 0x0A, 0xA7)); /* TOSTRT = 8, Mode B (gated clock), falling Edge, Serial, POL=HIGH, MSB */
291 CHK_ERROR(write_reg(ci, 0x0B, 0x33));
292 CHK_ERROR(write_reg(ci, 0x0C, 0x33));
294 CHK_ERROR(write_regm(ci, 0x14, 0x00, 0x0F));
295 CHK_ERROR(write_reg(ci, 0x15, ci->clk_reg_b));
296 CHK_ERROR(write_regm(ci, 0x16, 0x00, 0x0F));
297 CHK_ERROR(write_reg(ci, 0x17, ci->clk_reg_f));
299 CHK_ERROR(write_reg(ci, 0x20, 0x28)); /* Integer Divider, Falling Edge, Internal Sync, */
300 CHK_ERROR(write_reg(ci, 0x21, 0x00)); /* MCLKI = TICLK/8 */
301 CHK_ERROR(write_reg(ci, 0x22, 0x07)); /* MCLKI = TICLK/8 */
304 CHK_ERROR(write_regm(ci, 0x20, 0x80, 0x80)); /* Reset CAM state machine */
306 CHK_ERROR(write_regm(ci, 0x03, 0x02, 02)); /* Enable IREQA Interrupt */
307 CHK_ERROR(write_reg(ci, 0x01, 0x04)); /* Enable CD Interrupt */
308 CHK_ERROR(write_reg(ci, 0x00, 0x31)); /* Enable TS1,Hot Swap,Slot A */
309 CHK_ERROR(write_regm(ci, 0x09, 0x08, 0x08)); /* Put TS in bypass */
315 mutex_unlock(&ci->lock);
321 static int read_attribute_mem(struct dvb_ca_en50221 *ca,
322 int slot, int address)
324 struct cxd *ci = ca->data;
326 mutex_lock(&ci->lock);
328 read_pccard(ci, address, &val, 1);
329 mutex_unlock(&ci->lock);
334 static int write_attribute_mem(struct dvb_ca_en50221 *ca, int slot,
335 int address, u8 value)
337 struct cxd *ci = ca->data;
339 mutex_lock(&ci->lock);
341 write_pccard(ci, address, &value, 1);
342 mutex_unlock(&ci->lock);
346 static int read_cam_control(struct dvb_ca_en50221 *ca,
347 int slot, u8 address)
349 struct cxd *ci = ca->data;
352 mutex_lock(&ci->lock);
354 read_io(ci, address, &val);
355 mutex_unlock(&ci->lock);
359 static int write_cam_control(struct dvb_ca_en50221 *ca, int slot,
360 u8 address, u8 value)
362 struct cxd *ci = ca->data;
364 mutex_lock(&ci->lock);
366 write_io(ci, address, value);
367 mutex_unlock(&ci->lock);
371 static int slot_reset(struct dvb_ca_en50221 *ca, int slot)
373 struct cxd *ci = ca->data;
375 mutex_lock(&ci->lock);
377 write_reg(ci, 0x00, 0x21);
378 write_reg(ci, 0x06, 0x1F);
379 write_reg(ci, 0x00, 0x31);
380 write_regm(ci, 0x20, 0x80, 0x80);
381 write_reg(ci, 0x03, 0x02);
386 for (i = 0; i < 100; i++) {
392 mutex_unlock(&ci->lock);
397 static int slot_shutdown(struct dvb_ca_en50221 *ca, int slot)
399 struct cxd *ci = ca->data;
401 printk(KERN_INFO "slot_shutdown\n");
402 mutex_lock(&ci->lock);
403 /* write_regm(ci, 0x09, 0x08, 0x08); */
404 write_regm(ci, 0x20, 0x80, 0x80);
405 write_regm(ci, 0x06, 0x07, 0x07);
407 mutex_unlock(&ci->lock);
408 return 0; /* shutdown(ci); */
411 static int slot_ts_enable(struct dvb_ca_en50221 *ca, int slot)
413 struct cxd *ci = ca->data;
415 mutex_lock(&ci->lock);
416 write_regm(ci, 0x09, 0x00, 0x08);
421 mutex_unlock(&ci->lock);
426 static int campoll(struct cxd *ci)
430 read_reg(ci, 0x04, &istat);
433 write_reg(ci, 0x05, istat);
437 printk(KERN_INFO "DR\n");
440 printk(KERN_INFO "WC\n");
445 read_reg(ci, 0x01, &slotstat);
447 if (!ci->slot_stat) {
448 ci->slot_stat |= DVB_CA_EN50221_POLL_CAM_PRESENT;
449 write_regm(ci, 0x03, 0x08, 0x08);
455 write_regm(ci, 0x03, 0x00, 0x08);
456 printk(KERN_INFO "NO CAM\n");
460 if (istat&8 && ci->slot_stat == DVB_CA_EN50221_POLL_CAM_PRESENT) {
462 ci->slot_stat |= DVB_CA_EN50221_POLL_CAM_READY;
463 printk(KERN_INFO "READY\n");
470 static int poll_slot_status(struct dvb_ca_en50221 *ca, int slot, int open)
472 struct cxd *ci = ca->data;
475 mutex_lock(&ci->lock);
477 read_reg(ci, 0x01, &slotstat);
478 mutex_unlock(&ci->lock);
480 return ci->slot_stat;
484 static int read_data(struct dvb_ca_en50221 *ca, int slot, u8 *ebuf, int ecount)
486 struct cxd *ci = ca->data;
490 mutex_lock(&ci->lock);
492 mutex_unlock(&ci->lock);
494 printk(KERN_INFO "read_data\n");
498 mutex_lock(&ci->lock);
499 read_reg(ci, 0x0f, &msb);
500 read_reg(ci, 0x10, &lsb);
502 read_block(ci, 0x12, ebuf, len);
504 mutex_unlock(&ci->lock);
509 static int write_data(struct dvb_ca_en50221 *ca, int slot, u8 *ebuf, int ecount)
511 struct cxd *ci = ca->data;
513 mutex_lock(&ci->lock);
514 printk(KERN_INFO "write_data %d\n", ecount);
515 write_reg(ci, 0x0d, ecount>>8);
516 write_reg(ci, 0x0e, ecount&0xff);
517 write_block(ci, 0x11, ebuf, ecount);
518 mutex_unlock(&ci->lock);
523 static struct dvb_ca_en50221 en_templ = {
524 .read_attribute_mem = read_attribute_mem,
525 .write_attribute_mem = write_attribute_mem,
526 .read_cam_control = read_cam_control,
527 .write_cam_control = write_cam_control,
528 .slot_reset = slot_reset,
529 .slot_shutdown = slot_shutdown,
530 .slot_ts_enable = slot_ts_enable,
531 .poll_slot_status = poll_slot_status,
533 .read_data = read_data,
534 .write_data = write_data,
539 struct dvb_ca_en50221 *cxd2099_attach(u8 adr, void *priv,
540 struct i2c_adapter *i2c)
543 u32 bitrate = 62000000;
546 if (i2c_read_reg(i2c, adr, 0, &val) < 0) {
547 printk(KERN_ERR "No CXD2099 detected at %02x\n", adr);
551 ci = kmalloc(sizeof(struct cxd), GFP_KERNEL);
554 memset(ci, 0, sizeof(*ci));
556 mutex_init(&ci->lock);
559 ci->lastaddress = 0xff;
560 ci->clk_reg_b = 0x4a;
561 ci->clk_reg_f = 0x1b;
562 ci->bitrate = bitrate;
564 memcpy(&ci->en, &en_templ, sizeof(en_templ));
567 printk(KERN_INFO "Attached CXD2099AR at %02x\n", ci->adr);
570 EXPORT_SYMBOL(cxd2099_attach);
572 MODULE_DESCRIPTION("cxd2099");
573 MODULE_AUTHOR("Ralph Metzler <rjkm@metzlerbros.de>");
574 MODULE_LICENSE("GPL");