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Linux/drivers/media/usb/dvb-usb/friio.c

  1 /* DVB USB compliant Linux driver for the Friio USB2.0 ISDB-T receiver.
  2  *
  3  * Copyright (C) 2009 Akihiro Tsukada <tskd2@yahoo.co.jp>
  4  *
  5  * This module is based off the the gl861 and vp702x modules.
  6  *
  7  * This program is free software; you can redistribute it and/or modify it
  8  * under the terms of the GNU General Public License as published by the Free
  9  * Software Foundation, version 2.
 10  *
 11  * see Documentation/dvb/README.dvb-usb for more information
 12  */
 13 #include "friio.h"
 14 
 15 /* debug */
 16 int dvb_usb_friio_debug;
 17 module_param_named(debug, dvb_usb_friio_debug, int, 0644);
 18 MODULE_PARM_DESC(debug,
 19                  "set debugging level (1=info,2=xfer,4=rc,8=fe (or-able))."
 20                  DVB_USB_DEBUG_STATUS);
 21 
 22 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
 23 
 24 /**
 25  * Indirect I2C access to the PLL via FE.
 26  * whole I2C protocol data to the PLL is sent via the FE's I2C register.
 27  * This is done by a control msg to the FE with the I2C data accompanied, and
 28  * a specific USB request number is assigned for that purpose.
 29  *
 30  * this func sends wbuf[1..] to the I2C register wbuf[0] at addr (= at FE).
 31  * TODO: refoctored, smarter i2c functions.
 32  */
 33 static int gl861_i2c_ctrlmsg_data(struct dvb_usb_device *d, u8 addr,
 34                                   u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
 35 {
 36         u16 index = wbuf[0];    /* must be JDVBT90502_2ND_I2C_REG(=0xFE) */
 37         u16 value = addr << (8 + 1);
 38         int wo = (rbuf == NULL || rlen == 0);   /* write only */
 39         u8 req, type;
 40 
 41         deb_xfer("write to PLL:0x%02x via FE reg:0x%02x, len:%d\n",
 42                  wbuf[1], wbuf[0], wlen - 1);
 43 
 44         if (wo && wlen >= 2) {
 45                 req = GL861_REQ_I2C_DATA_CTRL_WRITE;
 46                 type = GL861_WRITE;
 47                 udelay(20);
 48                 return usb_control_msg(d->udev, usb_sndctrlpipe(d->udev, 0),
 49                                        req, type, value, index,
 50                                        &wbuf[1], wlen - 1, 2000);
 51         }
 52 
 53         deb_xfer("not supported ctrl-msg, aborting.");
 54         return -EINVAL;
 55 }
 56 
 57 /* normal I2C access (without extra data arguments).
 58  * write to the register wbuf[0] at I2C address addr with the value wbuf[1],
 59  *  or read from the register wbuf[0].
 60  * register address can be 16bit (wbuf[2]<<8 | wbuf[0]) if wlen==3
 61  */
 62 static int gl861_i2c_msg(struct dvb_usb_device *d, u8 addr,
 63                          u8 *wbuf, u16 wlen, u8 *rbuf, u16 rlen)
 64 {
 65         u16 index;
 66         u16 value = addr << (8 + 1);
 67         int wo = (rbuf == NULL || rlen == 0);   /* write-only */
 68         u8 req, type;
 69         unsigned int pipe;
 70 
 71         /* special case for the indirect I2C access to the PLL via FE, */
 72         if (addr == friio_fe_config.demod_address &&
 73             wbuf[0] == JDVBT90502_2ND_I2C_REG)
 74                 return gl861_i2c_ctrlmsg_data(d, addr, wbuf, wlen, rbuf, rlen);
 75 
 76         if (wo) {
 77                 req = GL861_REQ_I2C_WRITE;
 78                 type = GL861_WRITE;
 79                 pipe = usb_sndctrlpipe(d->udev, 0);
 80         } else {                /* rw */
 81                 req = GL861_REQ_I2C_READ;
 82                 type = GL861_READ;
 83                 pipe = usb_rcvctrlpipe(d->udev, 0);
 84         }
 85 
 86         switch (wlen) {
 87         case 1:
 88                 index = wbuf[0];
 89                 break;
 90         case 2:
 91                 index = wbuf[0];
 92                 value = value + wbuf[1];
 93                 break;
 94         case 3:
 95                 /* special case for 16bit register-address */
 96                 index = (wbuf[2] << 8) | wbuf[0];
 97                 value = value + wbuf[1];
 98                 break;
 99         default:
100                 deb_xfer("wlen = %x, aborting.", wlen);
101                 return -EINVAL;
102         }
103         msleep(1);
104         return usb_control_msg(d->udev, pipe, req, type,
105                                value, index, rbuf, rlen, 2000);
106 }
107 
108 /* I2C */
109 static int gl861_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
110                           int num)
111 {
112         struct dvb_usb_device *d = i2c_get_adapdata(adap);
113         int i;
114 
115 
116         if (num > 2)
117                 return -EINVAL;
118 
119         if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
120                 return -EAGAIN;
121 
122         for (i = 0; i < num; i++) {
123                 /* write/read request */
124                 if (i + 1 < num && (msg[i + 1].flags & I2C_M_RD)) {
125                         if (gl861_i2c_msg(d, msg[i].addr,
126                                           msg[i].buf, msg[i].len,
127                                           msg[i + 1].buf, msg[i + 1].len) < 0)
128                                 break;
129                         i++;
130                 } else
131                         if (gl861_i2c_msg(d, msg[i].addr, msg[i].buf,
132                                           msg[i].len, NULL, 0) < 0)
133                                 break;
134         }
135 
136         mutex_unlock(&d->i2c_mutex);
137         return i;
138 }
139 
140 static u32 gl861_i2c_func(struct i2c_adapter *adapter)
141 {
142         return I2C_FUNC_I2C;
143 }
144 
145 static int friio_ext_ctl(struct dvb_usb_adapter *adap,
146                          u32 sat_color, int lnb_on)
147 {
148         int i;
149         int ret;
150         struct i2c_msg msg;
151         u8 *buf;
152         u32 mask;
153         u8 lnb = (lnb_on) ? FRIIO_CTL_LNB : 0;
154 
155         buf = kmalloc(2, GFP_KERNEL);
156         if (!buf)
157                 return -ENOMEM;
158 
159         msg.addr = 0x00;
160         msg.flags = 0;
161         msg.len = 2;
162         msg.buf = buf;
163 
164         buf[0] = 0x00;
165 
166         /* send 2bit header (&B10) */
167         buf[1] = lnb | FRIIO_CTL_LED | FRIIO_CTL_STROBE;
168         ret = gl861_i2c_xfer(&adap->dev->i2c_adap, &msg, 1);
169         buf[1] |= FRIIO_CTL_CLK;
170         ret += gl861_i2c_xfer(&adap->dev->i2c_adap, &msg, 1);
171 
172         buf[1] = lnb | FRIIO_CTL_STROBE;
173         ret += gl861_i2c_xfer(&adap->dev->i2c_adap, &msg, 1);
174         buf[1] |= FRIIO_CTL_CLK;
175         ret += gl861_i2c_xfer(&adap->dev->i2c_adap, &msg, 1);
176 
177         /* send 32bit(satur, R, G, B) data in serial */
178         mask = 1 << 31;
179         for (i = 0; i < 32; i++) {
180                 buf[1] = lnb | FRIIO_CTL_STROBE;
181                 if (sat_color & mask)
182                         buf[1] |= FRIIO_CTL_LED;
183                 ret += gl861_i2c_xfer(&adap->dev->i2c_adap, &msg, 1);
184                 buf[1] |= FRIIO_CTL_CLK;
185                 ret += gl861_i2c_xfer(&adap->dev->i2c_adap, &msg, 1);
186                 mask >>= 1;
187         }
188 
189         /* set the strobe off */
190         buf[1] = lnb;
191         ret += gl861_i2c_xfer(&adap->dev->i2c_adap, &msg, 1);
192         buf[1] |= FRIIO_CTL_CLK;
193         ret += gl861_i2c_xfer(&adap->dev->i2c_adap, &msg, 1);
194 
195         kfree(buf);
196         return (ret == 70);
197 }
198 
199 
200 static int friio_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff);
201 
202 /* TODO: move these init cmds to the FE's init routine? */
203 static u8 streaming_init_cmds[][2] = {
204         {0x33, 0x08},
205         {0x37, 0x40},
206         {0x3A, 0x1F},
207         {0x3B, 0xFF},
208         {0x3C, 0x1F},
209         {0x3D, 0xFF},
210         {0x38, 0x00},
211         {0x35, 0x00},
212         {0x39, 0x00},
213         {0x36, 0x00},
214 };
215 static int cmdlen = sizeof(streaming_init_cmds) / 2;
216 
217 /*
218  * Command sequence in this init function is a replay
219  *  of the captured USB commands from the Windows proprietary driver.
220  */
221 static int friio_initialize(struct dvb_usb_device *d)
222 {
223         int ret;
224         int i;
225         int retry = 0;
226         u8 *rbuf, *wbuf;
227 
228         deb_info("%s called.\n", __func__);
229 
230         wbuf = kmalloc(3, GFP_KERNEL);
231         if (!wbuf)
232                 return -ENOMEM;
233 
234         rbuf = kmalloc(2, GFP_KERNEL);
235         if (!rbuf) {
236                 kfree(wbuf);
237                 return -ENOMEM;
238         }
239 
240         /* use gl861_i2c_msg instead of gl861_i2c_xfer(), */
241         /* because the i2c device is not set up yet. */
242         wbuf[0] = 0x11;
243         wbuf[1] = 0x02;
244         ret = gl861_i2c_msg(d, 0x00, wbuf, 2, NULL, 0);
245         if (ret < 0)
246                 goto error;
247         msleep(2);
248 
249         wbuf[0] = 0x11;
250         wbuf[1] = 0x00;
251         ret = gl861_i2c_msg(d, 0x00, wbuf, 2, NULL, 0);
252         if (ret < 0)
253                 goto error;
254         msleep(1);
255 
256         /* following msgs should be in the FE's init code? */
257         /* cmd sequence to identify the device type? (friio black/white) */
258         wbuf[0] = 0x03;
259         wbuf[1] = 0x80;
260         /* can't use gl861_i2c_cmd, as the register-addr is 16bit(0x0100) */
261         ret = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev, 0),
262                               GL861_REQ_I2C_DATA_CTRL_WRITE, GL861_WRITE,
263                               0x1200, 0x0100, wbuf, 2, 2000);
264         if (ret < 0)
265                 goto error;
266 
267         msleep(2);
268         wbuf[0] = 0x00;
269         wbuf[2] = 0x01;         /* reg.0x0100 */
270         wbuf[1] = 0x00;
271         ret = gl861_i2c_msg(d, 0x12 >> 1, wbuf, 3, rbuf, 2);
272         /* my Friio White returns 0xffff. */
273         if (ret < 0 || rbuf[0] != 0xff || rbuf[1] != 0xff)
274                 goto error;
275 
276         msleep(2);
277         wbuf[0] = 0x03;
278         wbuf[1] = 0x80;
279         ret = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev, 0),
280                               GL861_REQ_I2C_DATA_CTRL_WRITE, GL861_WRITE,
281                               0x9000, 0x0100, wbuf, 2, 2000);
282         if (ret < 0)
283                 goto error;
284 
285         msleep(2);
286         wbuf[0] = 0x00;
287         wbuf[2] = 0x01;         /* reg.0x0100 */
288         wbuf[1] = 0x00;
289         ret = gl861_i2c_msg(d, 0x90 >> 1, wbuf, 3, rbuf, 2);
290         /* my Friio White returns 0xffff again. */
291         if (ret < 0 || rbuf[0] != 0xff || rbuf[1] != 0xff)
292                 goto error;
293 
294         msleep(1);
295 
296 restart:
297         /* ============ start DEMOD init cmds ================== */
298         /* read PLL status to clear the POR bit */
299         wbuf[0] = JDVBT90502_2ND_I2C_REG;
300         wbuf[1] = (FRIIO_PLL_ADDR << 1) + 1;    /* +1 for reading */
301         ret = gl861_i2c_msg(d, FRIIO_DEMOD_ADDR, wbuf, 2, NULL, 0);
302         if (ret < 0)
303                 goto error;
304 
305         msleep(5);
306         /* note: DEMODULATOR has 16bit register-address. */
307         wbuf[0] = 0x00;
308         wbuf[2] = 0x01;         /* reg addr: 0x0100 */
309         wbuf[1] = 0x00;         /* val: not used */
310         ret = gl861_i2c_msg(d, FRIIO_DEMOD_ADDR, wbuf, 3, rbuf, 1);
311         if (ret < 0)
312                 goto error;
313 /*
314         msleep(1);
315         wbuf[0] = 0x80;
316         wbuf[1] = 0x00;
317         ret = gl861_i2c_msg(d, FRIIO_DEMOD_ADDR, wbuf, 2, rbuf, 1);
318         if (ret < 0)
319                 goto error;
320  */
321         if (rbuf[0] & 0x80) {   /* still in PowerOnReset state? */
322                 if (++retry > 3) {
323                         deb_info("failed to get the correct"
324                                  " FE demod status:0x%02x\n", rbuf[0]);
325                         goto error;
326                 }
327                 msleep(100);
328                 goto restart;
329         }
330 
331         /* TODO: check return value in rbuf */
332         /* =========== end DEMOD init cmds ===================== */
333         msleep(1);
334 
335         wbuf[0] = 0x30;
336         wbuf[1] = 0x04;
337         ret = gl861_i2c_msg(d, 0x00, wbuf, 2, NULL, 0);
338         if (ret < 0)
339                 goto error;
340 
341         msleep(2);
342         /* following 2 cmds unnecessary? */
343         wbuf[0] = 0x00;
344         wbuf[1] = 0x01;
345         ret = gl861_i2c_msg(d, 0x00, wbuf, 2, NULL, 0);
346         if (ret < 0)
347                 goto error;
348 
349         wbuf[0] = 0x06;
350         wbuf[1] = 0x0F;
351         ret = gl861_i2c_msg(d, 0x00, wbuf, 2, NULL, 0);
352         if (ret < 0)
353                 goto error;
354 
355         /* some streaming ctl cmds (maybe) */
356         msleep(10);
357         for (i = 0; i < cmdlen; i++) {
358                 ret = gl861_i2c_msg(d, 0x00, streaming_init_cmds[i], 2,
359                                     NULL, 0);
360                 if (ret < 0)
361                         goto error;
362                 msleep(1);
363         }
364         msleep(20);
365 
366         /* change the LED color etc. */
367         ret = friio_streaming_ctrl(&d->adapter[0], 0);
368         if (ret < 0)
369                 goto error;
370 
371         return 0;
372 
373 error:
374         kfree(wbuf);
375         kfree(rbuf);
376         deb_info("%s:ret == %d\n", __func__, ret);
377         return -EIO;
378 }
379 
380 /* Callbacks for DVB USB */
381 
382 static int friio_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
383 {
384         int ret;
385 
386         deb_info("%s called.(%d)\n", __func__, onoff);
387 
388         /* set the LED color and saturation (and LNB on) */
389         if (onoff)
390                 ret = friio_ext_ctl(adap, 0x6400ff64, 1);
391         else
392                 ret = friio_ext_ctl(adap, 0x96ff00ff, 1);
393 
394         if (ret != 1) {
395                 deb_info("%s failed to send cmdx. ret==%d\n", __func__, ret);
396                 return -EREMOTEIO;
397         }
398         return 0;
399 }
400 
401 static int friio_frontend_attach(struct dvb_usb_adapter *adap)
402 {
403         if (friio_initialize(adap->dev) < 0)
404                 return -EIO;
405 
406         adap->fe_adap[0].fe = jdvbt90502_attach(adap->dev);
407         if (adap->fe_adap[0].fe == NULL)
408                 return -EIO;
409 
410         return 0;
411 }
412 
413 /* DVB USB Driver stuff */
414 static struct dvb_usb_device_properties friio_properties;
415 
416 static int friio_probe(struct usb_interface *intf,
417                        const struct usb_device_id *id)
418 {
419         struct dvb_usb_device *d;
420         struct usb_host_interface *alt;
421         int ret;
422 
423         if (intf->num_altsetting < GL861_ALTSETTING_COUNT)
424                 return -ENODEV;
425 
426         alt = usb_altnum_to_altsetting(intf, FRIIO_BULK_ALTSETTING);
427         if (alt == NULL) {
428                 deb_rc("not alt found!\n");
429                 return -ENODEV;
430         }
431         ret = usb_set_interface(interface_to_usbdev(intf),
432                                 alt->desc.bInterfaceNumber,
433                                 alt->desc.bAlternateSetting);
434         if (ret != 0) {
435                 deb_rc("failed to set alt-setting!\n");
436                 return ret;
437         }
438 
439         ret = dvb_usb_device_init(intf, &friio_properties,
440                                   THIS_MODULE, &d, adapter_nr);
441         if (ret == 0)
442                 friio_streaming_ctrl(&d->adapter[0], 1);
443 
444         return ret;
445 }
446 
447 
448 struct jdvbt90502_config friio_fe_config = {
449         .demod_address = FRIIO_DEMOD_ADDR,
450         .pll_address = FRIIO_PLL_ADDR,
451 };
452 
453 static struct i2c_algorithm gl861_i2c_algo = {
454         .master_xfer   = gl861_i2c_xfer,
455         .functionality = gl861_i2c_func,
456 };
457 
458 static struct usb_device_id friio_table[] = {
459         { USB_DEVICE(USB_VID_774, USB_PID_FRIIO_WHITE) },
460         { }             /* Terminating entry */
461 };
462 MODULE_DEVICE_TABLE(usb, friio_table);
463 
464 
465 static struct dvb_usb_device_properties friio_properties = {
466         .caps = DVB_USB_IS_AN_I2C_ADAPTER,
467         .usb_ctrl = DEVICE_SPECIFIC,
468 
469         .size_of_priv = 0,
470 
471         .num_adapters = 1,
472         .adapter = {
473                 /* caps:0 =>  no pid filter, 188B TS packet */
474                 /* GL861 has a HW pid filter, but no info available. */
475                 {
476                 .num_frontends = 1,
477                 .fe = {{
478                         .caps  = 0,
479 
480                         .frontend_attach  = friio_frontend_attach,
481                         .streaming_ctrl = friio_streaming_ctrl,
482 
483                         .stream = {
484                                 .type = USB_BULK,
485                                 /* count <= MAX_NO_URBS_FOR_DATA_STREAM(10) */
486                                 .count = 8,
487                                 .endpoint = 0x01,
488                                 .u = {
489                                         /* GL861 has 6KB buf inside */
490                                         .bulk = {
491                                                 .buffersize = 16384,
492                                         }
493                                 }
494                         },
495                 }},
496                 }
497         },
498         .i2c_algo = &gl861_i2c_algo,
499 
500         .num_device_descs = 1,
501         .devices = {
502                 {
503                         .name = "774 Friio ISDB-T USB2.0",
504                         .cold_ids = { NULL },
505                         .warm_ids = { &friio_table[0], NULL },
506                 },
507         }
508 };
509 
510 static struct usb_driver friio_driver = {
511         .name           = "dvb_usb_friio",
512         .probe          = friio_probe,
513         .disconnect     = dvb_usb_device_exit,
514         .id_table       = friio_table,
515 };
516 
517 module_usb_driver(friio_driver);
518 
519 MODULE_AUTHOR("Akihiro Tsukada <tskd2@yahoo.co.jp>");
520 MODULE_DESCRIPTION("Driver for Friio ISDB-T USB2.0 Receiver");
521 MODULE_VERSION("0.2");
522 MODULE_LICENSE("GPL");
523 

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