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[linux-2.6-omap-h63xx.git] / drivers / media / dvb / dvb-usb / dib0700_core.c
1 /* Linux driver for devices based on the DiBcom DiB0700 USB bridge
2  *
3  *      This program is free software; you can redistribute it and/or modify it
4  *      under the terms of the GNU General Public License as published by the Free
5  *      Software Foundation, version 2.
6  *
7  *  Copyright (C) 2005-6 DiBcom, SA
8  */
9 #include "dib0700.h"
10
11 /* debug */
12 int dvb_usb_dib0700_debug;
13 module_param_named(debug,dvb_usb_dib0700_debug, int, 0644);
14 MODULE_PARM_DESC(debug, "set debugging level (1=info,2=fw,4=fwdata,8=data (or-able))." DVB_USB_DEBUG_STATUS);
15
16 int dvb_usb_dib0700_ir_proto = 1;
17 module_param(dvb_usb_dib0700_ir_proto, int, 0644);
18 MODULE_PARM_DESC(dvb_usb_dib0700_ir_proto, "set ir protocol (0=NEC, 1=RC5 (default), 2=RC6).");
19
20 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
21
22 /* expecting rx buffer: request data[0] data[1] ... data[2] */
23 static int dib0700_ctrl_wr(struct dvb_usb_device *d, u8 *tx, u8 txlen)
24 {
25         int status;
26
27         deb_data(">>> ");
28         debug_dump(tx,txlen,deb_data);
29
30         status = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev,0),
31                 tx[0], USB_TYPE_VENDOR | USB_DIR_OUT, 0, 0, tx, txlen,
32                 USB_CTRL_GET_TIMEOUT);
33
34         if (status != txlen)
35                 deb_data("ep 0 write error (status = %d, len: %d)\n",status,txlen);
36
37         return status < 0 ? status : 0;
38 }
39
40 /* expecting tx buffer: request data[0] ... data[n] (n <= 4) */
41 int dib0700_ctrl_rd(struct dvb_usb_device *d, u8 *tx, u8 txlen, u8 *rx, u8 rxlen)
42 {
43         u16 index, value;
44         int status;
45
46         if (txlen < 2) {
47                 err("tx buffer length is smaller than 2. Makes no sense.");
48                 return -EINVAL;
49         }
50         if (txlen > 4) {
51                 err("tx buffer length is larger than 4. Not supported.");
52                 return -EINVAL;
53         }
54
55         deb_data(">>> ");
56         debug_dump(tx,txlen,deb_data);
57
58         value = ((txlen - 2) << 8) | tx[1];
59         index = 0;
60         if (txlen > 2)
61                 index |= (tx[2] << 8);
62         if (txlen > 3)
63                 index |= tx[3];
64
65         status = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev,0), tx[0],
66                         USB_TYPE_VENDOR | USB_DIR_IN, value, index, rx, rxlen,
67                         USB_CTRL_GET_TIMEOUT);
68
69         if (status < 0)
70                 deb_info("ep 0 read error (status = %d)\n",status);
71
72         deb_data("<<< ");
73         debug_dump(rx,rxlen,deb_data);
74
75         return status; /* length in case of success */
76 }
77
78 int dib0700_set_gpio(struct dvb_usb_device *d, enum dib07x0_gpios gpio, u8 gpio_dir, u8 gpio_val)
79 {
80         u8 buf[3] = { REQUEST_SET_GPIO, gpio, ((gpio_dir & 0x01) << 7) | ((gpio_val & 0x01) << 6) };
81         return dib0700_ctrl_wr(d,buf,3);
82 }
83
84 /*
85  * I2C master xfer function (supported in 1.20 firmware)
86  */
87 static int dib0700_i2c_xfer_new(struct i2c_adapter *adap, struct i2c_msg *msg,
88                                 int num)
89 {
90         /* The new i2c firmware messages are more reliable and in particular
91            properly support i2c read calls not preceded by a write */
92
93         struct dvb_usb_device *d = i2c_get_adapdata(adap);
94         uint8_t bus_mode = 1;  /* 0=eeprom bus, 1=frontend bus */
95         uint8_t gen_mode = 0; /* 0=master i2c, 1=gpio i2c */
96         uint8_t en_start = 0;
97         uint8_t en_stop = 0;
98         uint8_t buf[255]; /* TBV: malloc ? */
99         int result, i;
100
101         /* Ensure nobody else hits the i2c bus while we're sending our
102            sequence of messages, (such as the remote control thread) */
103         if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
104                 return -EAGAIN;
105
106         for (i = 0; i < num; i++) {
107                 if (i == 0) {
108                         /* First message in the transaction */
109                         en_start = 1;
110                 } else if (!(msg[i].flags & I2C_M_NOSTART)) {
111                         /* Device supports repeated-start */
112                         en_start = 1;
113                 } else {
114                         /* Not the first packet and device doesn't support
115                            repeated start */
116                         en_start = 0;
117                 }
118                 if (i == (num - 1)) {
119                         /* Last message in the transaction */
120                         en_stop = 1;
121                 }
122
123                 if (msg[i].flags & I2C_M_RD) {
124                         /* Read request */
125                         u16 index, value;
126                         uint8_t i2c_dest;
127
128                         i2c_dest = (msg[i].addr << 1);
129                         value = ((en_start << 7) | (en_stop << 6) |
130                                  (msg[i].len & 0x3F)) << 8 | i2c_dest;
131                         /* I2C ctrl + FE bus; */
132                         index = ((gen_mode<<6)&0xC0) | ((bus_mode<<4)&0x30);
133
134                         result = usb_control_msg(d->udev,
135                                                  usb_rcvctrlpipe(d->udev, 0),
136                                                  REQUEST_NEW_I2C_READ,
137                                                  USB_TYPE_VENDOR | USB_DIR_IN,
138                                                  value, index, msg[i].buf,
139                                                  msg[i].len,
140                                                  USB_CTRL_GET_TIMEOUT);
141                         if (result < 0) {
142                                 err("i2c read error (status = %d)\n", result);
143                                 break;
144                         }
145                 } else {
146                         /* Write request */
147                         buf[0] = REQUEST_NEW_I2C_WRITE;
148                         buf[1] = (msg[i].addr << 1);
149                         buf[2] = (en_start << 7) | (en_stop << 6) |
150                                 (msg[i].len & 0x3F);
151                         /* I2C ctrl + FE bus; */
152                         buf[3] = ((gen_mode<<6)&0xC0) | ((bus_mode<<4)&0x30);
153                         /* The Actual i2c payload */
154                         memcpy(&buf[4], msg[i].buf, msg[i].len);
155
156                         result = usb_control_msg(d->udev,
157                                                  usb_sndctrlpipe(d->udev, 0),
158                                                  REQUEST_NEW_I2C_WRITE,
159                                                  USB_TYPE_VENDOR | USB_DIR_OUT,
160                                                  0, 0, buf, msg[i].len + 4,
161                                                  USB_CTRL_GET_TIMEOUT);
162                         if (result < 0) {
163                                 err("i2c write error (status = %d)\n", result);
164                                 break;
165                         }
166                 }
167         }
168         mutex_unlock(&d->i2c_mutex);
169         return i;
170 }
171
172 /*
173  * I2C master xfer function (pre-1.20 firmware)
174  */
175 static int dib0700_i2c_xfer_legacy(struct i2c_adapter *adap,
176                                    struct i2c_msg *msg, int num)
177 {
178         struct dvb_usb_device *d = i2c_get_adapdata(adap);
179         int i,len;
180         u8 buf[255];
181
182         if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
183                 return -EAGAIN;
184
185         for (i = 0; i < num; i++) {
186                 /* fill in the address */
187                 buf[1] = (msg[i].addr << 1);
188                 /* fill the buffer */
189                 memcpy(&buf[2], msg[i].buf, msg[i].len);
190
191                 /* write/read request */
192                 if (i+1 < num && (msg[i+1].flags & I2C_M_RD)) {
193                         buf[0] = REQUEST_I2C_READ;
194                         buf[1] |= 1;
195
196                         /* special thing in the current firmware: when length is zero the read-failed */
197                         if ((len = dib0700_ctrl_rd(d, buf, msg[i].len + 2, msg[i+1].buf, msg[i+1].len)) <= 0) {
198                                 deb_info("I2C read failed on address %x\n", msg[i].addr);
199                                 break;
200                         }
201
202                         msg[i+1].len = len;
203
204                         i++;
205                 } else {
206                         buf[0] = REQUEST_I2C_WRITE;
207                         if (dib0700_ctrl_wr(d, buf, msg[i].len + 2) < 0)
208                                 break;
209                 }
210         }
211
212         mutex_unlock(&d->i2c_mutex);
213         return i;
214 }
215
216 static int dib0700_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msg,
217                             int num)
218 {
219         struct dvb_usb_device *d = i2c_get_adapdata(adap);
220         struct dib0700_state *st = d->priv;
221
222         if (st->fw_use_new_i2c_api == 1) {
223                 /* User running at least fw 1.20 */
224                 return dib0700_i2c_xfer_new(adap, msg, num);
225         } else {
226                 /* Use legacy calls */
227                 return dib0700_i2c_xfer_legacy(adap, msg, num);
228         }
229 }
230
231 static u32 dib0700_i2c_func(struct i2c_adapter *adapter)
232 {
233         return I2C_FUNC_I2C;
234 }
235
236 struct i2c_algorithm dib0700_i2c_algo = {
237         .master_xfer   = dib0700_i2c_xfer,
238         .functionality = dib0700_i2c_func,
239 };
240
241 int dib0700_identify_state(struct usb_device *udev, struct dvb_usb_device_properties *props,
242                         struct dvb_usb_device_description **desc, int *cold)
243 {
244         u8 b[16];
245         s16 ret = usb_control_msg(udev, usb_rcvctrlpipe(udev,0),
246                 REQUEST_GET_VERSION, USB_TYPE_VENDOR | USB_DIR_IN, 0, 0, b, 16, USB_CTRL_GET_TIMEOUT);
247
248         deb_info("FW GET_VERSION length: %d\n",ret);
249
250         *cold = ret <= 0;
251
252         deb_info("cold: %d\n", *cold);
253         return 0;
254 }
255
256 static int dib0700_set_clock(struct dvb_usb_device *d, u8 en_pll,
257         u8 pll_src, u8 pll_range, u8 clock_gpio3, u16 pll_prediv,
258         u16 pll_loopdiv, u16 free_div, u16 dsuScaler)
259 {
260         u8 b[10];
261         b[0] = REQUEST_SET_CLOCK;
262         b[1] = (en_pll << 7) | (pll_src << 6) | (pll_range << 5) | (clock_gpio3 << 4);
263         b[2] = (pll_prediv >> 8)  & 0xff; // MSB
264         b[3] =  pll_prediv        & 0xff; // LSB
265         b[4] = (pll_loopdiv >> 8) & 0xff; // MSB
266         b[5] =  pll_loopdiv       & 0xff; // LSB
267         b[6] = (free_div >> 8)    & 0xff; // MSB
268         b[7] =  free_div          & 0xff; // LSB
269         b[8] = (dsuScaler >> 8)   & 0xff; // MSB
270         b[9] =  dsuScaler         & 0xff; // LSB
271
272         return dib0700_ctrl_wr(d, b, 10);
273 }
274
275 int dib0700_ctrl_clock(struct dvb_usb_device *d, u32 clk_MHz, u8 clock_out_gp3)
276 {
277         switch (clk_MHz) {
278                 case 72: dib0700_set_clock(d, 1, 0, 1, clock_out_gp3, 2, 24, 0, 0x4c); break;
279                 default: return -EINVAL;
280         }
281         return 0;
282 }
283
284 static int dib0700_jumpram(struct usb_device *udev, u32 address)
285 {
286         int ret, actlen;
287         u8 buf[8] = { REQUEST_JUMPRAM, 0, 0, 0,
288                 (address >> 24) & 0xff,
289                 (address >> 16) & 0xff,
290                 (address >> 8)  & 0xff,
291                  address        & 0xff };
292
293         if ((ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, 0x01),buf,8,&actlen,1000)) < 0) {
294                 deb_fw("jumpram to 0x%x failed\n",address);
295                 return ret;
296         }
297         if (actlen != 8) {
298                 deb_fw("jumpram to 0x%x failed\n",address);
299                 return -EIO;
300         }
301         return 0;
302 }
303
304 int dib0700_download_firmware(struct usb_device *udev, const struct firmware *fw)
305 {
306         struct hexline hx;
307         int pos = 0, ret, act_len;
308
309         u8 buf[260];
310
311         while ((ret = dvb_usb_get_hexline(fw, &hx, &pos)) > 0) {
312                 deb_fwdata("writing to address 0x%08x (buffer: 0x%02x %02x)\n",hx.addr, hx.len, hx.chk);
313
314                 buf[0] = hx.len;
315                 buf[1] = (hx.addr >> 8) & 0xff;
316                 buf[2] =  hx.addr       & 0xff;
317                 buf[3] = hx.type;
318                 memcpy(&buf[4],hx.data,hx.len);
319                 buf[4+hx.len] = hx.chk;
320
321                 ret = usb_bulk_msg(udev,
322                         usb_sndbulkpipe(udev, 0x01),
323                         buf,
324                         hx.len + 5,
325                         &act_len,
326                         1000);
327
328                 if (ret < 0) {
329                         err("firmware download failed at %d with %d",pos,ret);
330                         return ret;
331                 }
332         }
333
334         if (ret == 0) {
335                 /* start the firmware */
336                 if ((ret = dib0700_jumpram(udev, 0x70000000)) == 0) {
337                         info("firmware started successfully.");
338                         msleep(500);
339                 }
340         } else
341                 ret = -EIO;
342
343         return ret;
344 }
345
346 int dib0700_streaming_ctrl(struct dvb_usb_adapter *adap, int onoff)
347 {
348         struct dib0700_state *st = adap->dev->priv;
349         u8 b[4];
350
351         b[0] = REQUEST_ENABLE_VIDEO;
352         b[1] = (onoff << 4) | 0x00; /* this bit gives a kind of command, rather than enabling something or not */
353
354         if (st->disable_streaming_master_mode == 1)
355                 b[2] = 0x00;
356         else
357                 b[2] = (0x01 << 4); /* Master mode */
358
359         b[3] = 0x00;
360
361         deb_info("modifying (%d) streaming state for %d\n", onoff, adap->id);
362
363         if (onoff)
364                 st->channel_state |=   1 << adap->id;
365         else
366                 st->channel_state &= ~(1 << adap->id);
367
368         b[2] |= st->channel_state;
369
370         deb_info("data for streaming: %x %x\n",b[1],b[2]);
371
372         return dib0700_ctrl_wr(adap->dev, b, 4);
373 }
374
375 int dib0700_rc_setup(struct dvb_usb_device *d)
376 {
377         u8 rc_setup[3] = {REQUEST_SET_RC, dvb_usb_dib0700_ir_proto, 0};
378         int i = dib0700_ctrl_wr(d, rc_setup, 3);
379         if (i<0) {
380                 err("ir protocol setup failed");
381                 return -1;
382         }
383         return 0;
384 }
385
386 static int dib0700_probe(struct usb_interface *intf,
387                 const struct usb_device_id *id)
388 {
389         int i;
390         struct dvb_usb_device *dev;
391
392         for (i = 0; i < dib0700_device_count; i++)
393                 if (dvb_usb_device_init(intf, &dib0700_devices[i], THIS_MODULE,
394                                         &dev, adapter_nr) == 0)
395                 {
396                         dib0700_rc_setup(dev);
397                         return 0;
398                 }
399
400         return -ENODEV;
401 }
402
403 static struct usb_driver dib0700_driver = {
404         .name       = "dvb_usb_dib0700",
405         .probe      = dib0700_probe,
406         .disconnect = dvb_usb_device_exit,
407         .id_table   = dib0700_usb_id_table,
408 };
409
410 /* module stuff */
411 static int __init dib0700_module_init(void)
412 {
413         int result;
414         info("loaded with support for %d different device-types", dib0700_device_count);
415         if ((result = usb_register(&dib0700_driver))) {
416                 err("usb_register failed. Error number %d",result);
417                 return result;
418         }
419
420         return 0;
421 }
422
423 static void __exit dib0700_module_exit(void)
424 {
425         /* deregister this driver from the USB subsystem */
426         usb_deregister(&dib0700_driver);
427 }
428
429 module_init (dib0700_module_init);
430 module_exit (dib0700_module_exit);
431
432 MODULE_AUTHOR("Patrick Boettcher <pboettcher@dibcom.fr>");
433 MODULE_DESCRIPTION("Driver for devices based on DiBcom DiB0700 - USB bridge");
434 MODULE_VERSION("1.0");
435 MODULE_LICENSE("GPL");