2 * Abilis Systems Single DVB-T Receiver
3 * Copyright (C) 2008 Pierrick Hascoet <pierrick.hascoet@abilis.com>
4 * Copyright (C) 2010 Devin Heitmueller <dheitmueller@kernellabs.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2, or (at your option)
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #include <linux/kernel.h>
21 #include <linux/errno.h>
22 #include <linux/slab.h>
24 #include <linux/usb.h>
26 #include "as102_drv.h"
27 #include "as102_usb_drv.h"
30 static void as102_usb_disconnect(struct usb_interface *interface);
31 static int as102_usb_probe(struct usb_interface *interface,
32 const struct usb_device_id *id);
34 static int as102_usb_start_stream(struct as102_dev_t *dev);
35 static void as102_usb_stop_stream(struct as102_dev_t *dev);
37 static int as102_open(struct inode *inode, struct file *file);
38 static int as102_release(struct inode *inode, struct file *file);
40 static struct usb_device_id as102_usb_id_table[] = {
41 { USB_DEVICE(AS102_USB_DEVICE_VENDOR_ID, AS102_USB_DEVICE_PID_0001) },
42 { USB_DEVICE(PCTV_74E_USB_VID, PCTV_74E_USB_PID) },
43 { USB_DEVICE(ELGATO_EYETV_DTT_USB_VID, ELGATO_EYETV_DTT_USB_PID) },
44 { USB_DEVICE(NBOX_DVBT_DONGLE_USB_VID, NBOX_DVBT_DONGLE_USB_PID) },
45 { } /* Terminating entry */
48 /* Note that this table must always have the same number of entries as the
49 as102_usb_id_table struct */
50 static const char *as102_device_names[] = {
51 AS102_REFERENCE_DESIGN,
53 AS102_ELGATO_EYETV_DTT_NAME,
54 AS102_NBOX_DVBT_DONGLE_NAME,
55 NULL /* Terminating entry */
58 struct usb_driver as102_usb_driver = {
59 .name = DRIVER_FULL_NAME,
60 .probe = as102_usb_probe,
61 .disconnect = as102_usb_disconnect,
62 .id_table = as102_usb_id_table
65 static const struct file_operations as102_dev_fops = {
68 .release = as102_release,
71 static struct usb_class_driver as102_usb_class_driver = {
73 .fops = &as102_dev_fops,
74 .minor_base = AS102_DEVICE_MAJOR,
77 static int as102_usb_xfer_cmd(struct as102_bus_adapter_t *bus_adap,
78 unsigned char *send_buf, int send_buf_len,
79 unsigned char *recv_buf, int recv_buf_len)
84 if (send_buf != NULL) {
85 ret = usb_control_msg(bus_adap->usb_dev,
86 usb_sndctrlpipe(bus_adap->usb_dev, 0),
87 AS102_USB_DEVICE_TX_CTRL_CMD,
88 USB_DIR_OUT | USB_TYPE_VENDOR |
90 bus_adap->cmd_xid, /* value */
92 send_buf, send_buf_len,
93 USB_CTRL_SET_TIMEOUT /* 200 */);
95 dprintk(debug, "usb_control_msg(send) failed, err %i\n",
100 if (ret != send_buf_len) {
101 dprintk(debug, "only wrote %d of %d bytes\n",
107 if (recv_buf != NULL) {
109 dprintk(debug, "want to read: %d bytes\n", recv_buf_len);
111 ret = usb_control_msg(bus_adap->usb_dev,
112 usb_rcvctrlpipe(bus_adap->usb_dev, 0),
113 AS102_USB_DEVICE_RX_CTRL_CMD,
114 USB_DIR_IN | USB_TYPE_VENDOR |
116 bus_adap->cmd_xid, /* value */
118 recv_buf, recv_buf_len,
119 USB_CTRL_GET_TIMEOUT /* 200 */);
121 dprintk(debug, "usb_control_msg(recv) failed, err %i\n",
126 dprintk(debug, "read %d bytes\n", recv_buf_len);
134 static int as102_send_ep1(struct as102_bus_adapter_t *bus_adap,
135 unsigned char *send_buf,
139 int ret = 0, actual_len;
141 ret = usb_bulk_msg(bus_adap->usb_dev,
142 usb_sndbulkpipe(bus_adap->usb_dev, 1),
143 send_buf, send_buf_len, &actual_len, 200);
145 dprintk(debug, "usb_bulk_msg(send) failed, err %i\n", ret);
149 if (actual_len != send_buf_len) {
150 dprintk(debug, "only wrote %d of %d bytes\n",
151 actual_len, send_buf_len);
154 return ret ? ret : actual_len;
157 static int as102_read_ep2(struct as102_bus_adapter_t *bus_adap,
158 unsigned char *recv_buf, int recv_buf_len)
160 int ret = 0, actual_len;
162 if (recv_buf == NULL)
165 ret = usb_bulk_msg(bus_adap->usb_dev,
166 usb_rcvbulkpipe(bus_adap->usb_dev, 2),
167 recv_buf, recv_buf_len, &actual_len, 200);
169 dprintk(debug, "usb_bulk_msg(recv) failed, err %i\n", ret);
173 if (actual_len != recv_buf_len) {
174 dprintk(debug, "only read %d of %d bytes\n",
175 actual_len, recv_buf_len);
178 return ret ? ret : actual_len;
181 struct as102_priv_ops_t as102_priv_ops = {
182 .upload_fw_pkt = as102_send_ep1,
183 .xfer_cmd = as102_usb_xfer_cmd,
184 .as102_read_ep2 = as102_read_ep2,
185 .start_stream = as102_usb_start_stream,
186 .stop_stream = as102_usb_stop_stream,
189 static int as102_submit_urb_stream(struct as102_dev_t *dev, struct urb *urb)
193 usb_fill_bulk_urb(urb,
194 dev->bus_adap.usb_dev,
195 usb_rcvbulkpipe(dev->bus_adap.usb_dev, 0x2),
196 urb->transfer_buffer,
198 as102_urb_stream_irq,
201 err = usb_submit_urb(urb, GFP_ATOMIC);
203 dprintk(debug, "%s: usb_submit_urb failed\n", __func__);
208 void as102_urb_stream_irq(struct urb *urb)
210 struct as102_dev_t *as102_dev = urb->context;
212 if (urb->actual_length > 0) {
213 dvb_dmx_swfilter(&as102_dev->dvb_dmx,
214 urb->transfer_buffer,
217 if (urb->actual_length == 0)
218 memset(urb->transfer_buffer, 0, AS102_USB_BUF_SIZE);
221 /* is not stopped, re-submit urb */
222 if (as102_dev->streaming)
223 as102_submit_urb_stream(as102_dev, urb);
226 static void as102_free_usb_stream_buffer(struct as102_dev_t *dev)
232 for (i = 0; i < MAX_STREAM_URB; i++)
233 usb_free_urb(dev->stream_urb[i]);
235 usb_free_coherent(dev->bus_adap.usb_dev,
236 MAX_STREAM_URB * AS102_USB_BUF_SIZE,
242 static int as102_alloc_usb_stream_buffer(struct as102_dev_t *dev)
248 dev->stream = usb_alloc_coherent(dev->bus_adap.usb_dev,
249 MAX_STREAM_URB * AS102_USB_BUF_SIZE,
253 dprintk(debug, "%s: usb_buffer_alloc failed\n", __func__);
257 memset(dev->stream, 0, MAX_STREAM_URB * AS102_USB_BUF_SIZE);
259 /* init urb buffers */
260 for (i = 0; i < MAX_STREAM_URB; i++) {
263 urb = usb_alloc_urb(0, GFP_ATOMIC);
265 dprintk(debug, "%s: usb_alloc_urb failed\n", __func__);
266 as102_free_usb_stream_buffer(dev);
270 urb->transfer_buffer = dev->stream + (i * AS102_USB_BUF_SIZE);
271 urb->transfer_dma = dev->dma_addr + (i * AS102_USB_BUF_SIZE);
272 urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
273 urb->transfer_buffer_length = AS102_USB_BUF_SIZE;
275 dev->stream_urb[i] = urb;
281 static void as102_usb_stop_stream(struct as102_dev_t *dev)
285 for (i = 0; i < MAX_STREAM_URB; i++)
286 usb_kill_urb(dev->stream_urb[i]);
289 static int as102_usb_start_stream(struct as102_dev_t *dev)
293 for (i = 0; i < MAX_STREAM_URB; i++) {
294 ret = as102_submit_urb_stream(dev, dev->stream_urb[i]);
296 as102_usb_stop_stream(dev);
304 static void as102_usb_release(struct kref *kref)
306 struct as102_dev_t *as102_dev;
310 as102_dev = container_of(kref, struct as102_dev_t, kref);
311 if (as102_dev != NULL) {
312 usb_put_dev(as102_dev->bus_adap.usb_dev);
319 static void as102_usb_disconnect(struct usb_interface *intf)
321 struct as102_dev_t *as102_dev;
325 /* extract as102_dev_t from usb_device private data */
326 as102_dev = usb_get_intfdata(intf);
328 /* unregister dvb layer */
329 as102_dvb_unregister(as102_dev);
331 /* free usb buffers */
332 as102_free_usb_stream_buffer(as102_dev);
334 usb_set_intfdata(intf, NULL);
336 /* usb unregister device */
337 usb_deregister_dev(intf, &as102_usb_class_driver);
339 /* decrement usage counter */
340 kref_put(&as102_dev->kref, as102_usb_release);
342 printk(KERN_INFO "%s: device has been disconnected\n", DRIVER_NAME);
347 static int as102_usb_probe(struct usb_interface *intf,
348 const struct usb_device_id *id)
351 struct as102_dev_t *as102_dev;
356 as102_dev = kzalloc(sizeof(struct as102_dev_t), GFP_KERNEL);
357 if (as102_dev == NULL) {
358 err("%s: kzalloc failed", __func__);
362 /* This should never actually happen */
363 if ((sizeof(as102_usb_id_table) / sizeof(struct usb_device_id)) !=
364 (sizeof(as102_device_names) / sizeof(const char *))) {
365 printk(KERN_ERR "Device names table invalid size");
369 /* Assign the user-friendly device name */
370 for (i = 0; i < (sizeof(as102_usb_id_table) /
371 sizeof(struct usb_device_id)); i++) {
372 if (id == &as102_usb_id_table[i])
373 as102_dev->name = as102_device_names[i];
376 if (as102_dev->name == NULL)
377 as102_dev->name = "Unknown AS102 device";
379 /* set private callback functions */
380 as102_dev->bus_adap.ops = &as102_priv_ops;
382 /* init cmd token for usb bus */
383 as102_dev->bus_adap.cmd = &as102_dev->bus_adap.token.usb.c;
384 as102_dev->bus_adap.rsp = &as102_dev->bus_adap.token.usb.r;
386 /* init kernel device reference */
387 kref_init(&as102_dev->kref);
389 /* store as102 device to usb_device private data */
390 usb_set_intfdata(intf, (void *) as102_dev);
392 /* store in as102 device the usb_device pointer */
393 as102_dev->bus_adap.usb_dev = usb_get_dev(interface_to_usbdev(intf));
395 /* we can register the device now, as it is ready */
396 ret = usb_register_dev(intf, &as102_usb_class_driver);
398 /* something prevented us from registering this driver */
399 err("%s: usb_register_dev() failed (errno = %d)",
404 printk(KERN_INFO "%s: device has been detected\n", DRIVER_NAME);
406 /* request buffer allocation for streaming */
407 ret = as102_alloc_usb_stream_buffer(as102_dev);
411 /* register dvb layer */
412 ret = as102_dvb_register(as102_dev);
418 usb_set_intfdata(intf, NULL);
423 static int as102_open(struct inode *inode, struct file *file)
425 int ret = 0, minor = 0;
426 struct usb_interface *intf = NULL;
427 struct as102_dev_t *dev = NULL;
431 /* read minor from inode */
432 minor = iminor(inode);
434 /* fetch device from usb interface */
435 intf = usb_find_interface(&as102_usb_driver, minor);
437 printk(KERN_ERR "%s: can't find device for minor %d\n",
444 dev = usb_get_intfdata(intf);
450 /* save our device object in the file's private structure */
451 file->private_data = dev;
453 /* increment our usage count for the device */
454 kref_get(&dev->kref);
461 static int as102_release(struct inode *inode, struct file *file)
464 struct as102_dev_t *dev = NULL;
468 dev = file->private_data;
470 /* decrement the count on our device */
471 kref_put(&dev->kref, as102_usb_release);
478 MODULE_DEVICE_TABLE(usb, as102_usb_id_table);
480 /* EOF - vim: set textwidth=80 ts=8 sw=8 sts=8 noet: */