2 * Driver for the Auvitek USB bridge
4 * Copyright (c) 2008 Steven Toth <stoth@linuxtv.org>
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 of the License, or
9 * (at your option) any later version.
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
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include <linux/module.h>
25 #include <linux/slab.h>
26 #include <linux/videodev2.h>
27 #include <media/v4l2-common.h>
28 #include <linux/mutex.h>
30 /* Due to enum tuner_pad_index */
31 #include <media/tuner.h>
34 * 1 = General debug messages
41 module_param_named(debug, au0828_debug, int, 0644);
42 MODULE_PARM_DESC(debug,
43 "set debug bitmask: 1=general, 2=USB, 4=I2C, 8=bridge, 16=IR");
45 static unsigned int disable_usb_speed_check;
46 module_param(disable_usb_speed_check, int, 0444);
47 MODULE_PARM_DESC(disable_usb_speed_check,
48 "override min bandwidth requirement of 480M bps");
50 #define _AU0828_BULKPIPE 0x03
51 #define _BULKPIPESIZE 0xffff
53 static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
55 static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
56 u16 index, unsigned char *cp, u16 size);
59 #define CMD_REQUEST_IN 0x00
60 #define CMD_REQUEST_OUT 0x01
62 u32 au0828_readreg(struct au0828_dev *dev, u16 reg)
66 recv_control_msg(dev, CMD_REQUEST_IN, 0, reg, &result, 1);
67 dprintk(8, "%s(0x%04x) = 0x%02x\n", __func__, reg, result);
72 u32 au0828_writereg(struct au0828_dev *dev, u16 reg, u32 val)
74 dprintk(8, "%s(0x%04x, 0x%02x)\n", __func__, reg, val);
75 return send_control_msg(dev, CMD_REQUEST_OUT, val, reg);
78 static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
85 /* cp must be memory that has been allocated by kmalloc */
86 status = usb_control_msg(dev->usbdev,
87 usb_sndctrlpipe(dev->usbdev, 0),
89 USB_DIR_OUT | USB_TYPE_VENDOR |
91 value, index, NULL, 0, 1000);
93 status = min(status, 0);
96 pr_err("%s() Failed sending control message, error %d.\n",
105 static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
106 u16 index, unsigned char *cp, u16 size)
108 int status = -ENODEV;
109 mutex_lock(&dev->mutex);
111 status = usb_control_msg(dev->usbdev,
112 usb_rcvctrlpipe(dev->usbdev, 0),
114 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
116 dev->ctrlmsg, size, 1000);
118 status = min(status, 0);
121 pr_err("%s() Failed receiving control message, error %d.\n",
125 /* the host controller requires heap allocated memory, which
126 is why we didn't just pass "cp" into usb_control_msg */
127 memcpy(cp, dev->ctrlmsg, size);
129 mutex_unlock(&dev->mutex);
133 static void au0828_unregister_media_device(struct au0828_dev *dev)
136 #ifdef CONFIG_MEDIA_CONTROLLER
137 if (dev->media_dev) {
138 media_device_unregister(dev->media_dev);
139 kfree(dev->media_dev);
140 dev->media_dev = NULL;
145 static void au0828_usb_release(struct au0828_dev *dev)
147 au0828_unregister_media_device(dev);
150 au0828_i2c_unregister(dev);
155 #ifdef CONFIG_VIDEO_AU0828_V4L2
157 static void au0828_usb_v4l2_media_release(struct au0828_dev *dev)
159 #ifdef CONFIG_MEDIA_CONTROLLER
162 for (i = 0; i < AU0828_MAX_INPUT; i++) {
163 if (AUVI_INPUT(i).type == AU0828_VMUX_UNDEFINED)
165 media_device_unregister_entity(&dev->input_ent[i]);
170 static void au0828_usb_v4l2_release(struct v4l2_device *v4l2_dev)
172 struct au0828_dev *dev =
173 container_of(v4l2_dev, struct au0828_dev, v4l2_dev);
175 v4l2_ctrl_handler_free(&dev->v4l2_ctrl_hdl);
176 v4l2_device_unregister(&dev->v4l2_dev);
177 au0828_usb_v4l2_media_release(dev);
178 au0828_usb_release(dev);
182 static void au0828_usb_disconnect(struct usb_interface *interface)
184 struct au0828_dev *dev = usb_get_intfdata(interface);
186 dprintk(1, "%s()\n", __func__);
188 /* there is a small window after disconnect, before
189 dev->usbdev is NULL, for poll (e.g: IR) try to access
190 the device and fill the dmesg with error messages.
191 Set the status so poll routines can check and avoid
192 access after disconnect.
194 dev->dev_state = DEV_DISCONNECTED;
196 au0828_rc_unregister(dev);
198 au0828_dvb_unregister(dev);
200 usb_set_intfdata(interface, NULL);
201 mutex_lock(&dev->mutex);
203 mutex_unlock(&dev->mutex);
204 #ifdef CONFIG_VIDEO_AU0828_V4L2
205 if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED) {
206 au0828_analog_unregister(dev);
207 v4l2_device_disconnect(&dev->v4l2_dev);
208 v4l2_device_put(&dev->v4l2_dev);
210 * No need to call au0828_usb_release() if V4L2 is enabled,
211 * as this is already called via au0828_usb_v4l2_release()
216 au0828_usb_release(dev);
219 static void au0828_media_device_register(struct au0828_dev *dev,
220 struct usb_device *udev)
222 #ifdef CONFIG_MEDIA_CONTROLLER
223 struct media_device *mdev;
226 mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);
230 mdev->dev = &udev->dev;
232 if (!dev->board.name)
233 strlcpy(mdev->model, "unknown au0828", sizeof(mdev->model));
235 strlcpy(mdev->model, dev->board.name, sizeof(mdev->model));
237 strlcpy(mdev->serial, udev->serial, sizeof(mdev->serial));
238 strcpy(mdev->bus_info, udev->devpath);
239 mdev->hw_revision = le16_to_cpu(udev->descriptor.bcdDevice);
240 mdev->driver_version = LINUX_VERSION_CODE;
242 ret = media_device_register(mdev);
245 "Couldn't create a media device. Error: %d\n",
251 dev->media_dev = mdev;
256 static int au0828_create_media_graph(struct au0828_dev *dev)
258 #ifdef CONFIG_MEDIA_CONTROLLER
259 struct media_device *mdev = dev->media_dev;
260 struct media_entity *entity;
261 struct media_entity *tuner = NULL, *decoder = NULL;
267 media_device_for_each_entity(entity, mdev) {
268 switch (entity->type) {
269 case MEDIA_ENT_T_V4L2_SUBDEV_TUNER:
272 case MEDIA_ENT_T_V4L2_SUBDEV_DECODER:
278 /* Analog setup, using tuner as a link */
280 /* Something bad happened! */
285 ret = media_create_pad_link(tuner, TUNER_PAD_IF_OUTPUT,
287 MEDIA_LNK_FL_ENABLED);
291 ret = media_create_pad_link(decoder, 1, &dev->vdev.entity, 0,
292 MEDIA_LNK_FL_ENABLED);
295 ret = media_create_pad_link(decoder, 2, &dev->vbi_dev.entity, 0,
296 MEDIA_LNK_FL_ENABLED);
300 for (i = 0; i < AU0828_MAX_INPUT; i++) {
301 struct media_entity *ent = &dev->input_ent[i];
303 if (AUVI_INPUT(i).type == AU0828_VMUX_UNDEFINED)
306 switch (AUVI_INPUT(i).type) {
307 case AU0828_VMUX_CABLE:
308 case AU0828_VMUX_TELEVISION:
309 case AU0828_VMUX_DVB:
313 ret = media_create_pad_link(ent, 0, tuner,
315 MEDIA_LNK_FL_ENABLED);
319 case AU0828_VMUX_COMPOSITE:
320 case AU0828_VMUX_SVIDEO:
321 default: /* AU0828_VMUX_DEBUG */
322 /* FIXME: fix the decoder PAD */
323 ret = media_create_pad_link(ent, 0, decoder, 0, 0);
333 static int au0828_usb_probe(struct usb_interface *interface,
334 const struct usb_device_id *id)
339 struct au0828_dev *dev;
340 struct usb_device *usbdev = interface_to_usbdev(interface);
342 ifnum = interface->altsetting->desc.bInterfaceNumber;
347 dprintk(1, "%s() vendor id 0x%x device id 0x%x ifnum:%d\n", __func__,
348 le16_to_cpu(usbdev->descriptor.idVendor),
349 le16_to_cpu(usbdev->descriptor.idProduct),
353 * Make sure we have 480 Mbps of bandwidth, otherwise things like
354 * video stream wouldn't likely work, since 12 Mbps is generally
355 * not enough even for most Digital TV streams.
357 if (usbdev->speed != USB_SPEED_HIGH && disable_usb_speed_check == 0) {
358 pr_err("au0828: Device initialization failed.\n");
359 pr_err("au0828: Device must be connected to a high-speed USB 2.0 port.\n");
363 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
365 pr_err("%s() Unable to allocate memory\n", __func__);
369 mutex_init(&dev->lock);
370 mutex_lock(&dev->lock);
371 mutex_init(&dev->mutex);
372 mutex_init(&dev->dvb.lock);
373 dev->usbdev = usbdev;
374 dev->boardnr = id->driver_info;
375 dev->board = au0828_boards[dev->boardnr];
377 /* Register the media controller */
378 au0828_media_device_register(dev, usbdev);
380 #ifdef CONFIG_VIDEO_AU0828_V4L2
381 dev->v4l2_dev.release = au0828_usb_v4l2_release;
383 /* Create the v4l2_device */
384 #ifdef CONFIG_MEDIA_CONTROLLER
385 dev->v4l2_dev.mdev = dev->media_dev;
387 retval = v4l2_device_register(&interface->dev, &dev->v4l2_dev);
389 pr_err("%s() v4l2_device_register failed\n",
391 mutex_unlock(&dev->lock);
395 /* This control handler will inherit the controls from au8522 */
396 retval = v4l2_ctrl_handler_init(&dev->v4l2_ctrl_hdl, 4);
398 pr_err("%s() v4l2_ctrl_handler_init failed\n",
400 mutex_unlock(&dev->lock);
404 dev->v4l2_dev.ctrl_handler = &dev->v4l2_ctrl_hdl;
407 /* Power Up the bridge */
408 au0828_write(dev, REG_600, 1 << 4);
410 /* Bring up the GPIO's and supporting devices */
411 au0828_gpio_setup(dev);
414 au0828_i2c_register(dev);
417 au0828_card_setup(dev);
419 #ifdef CONFIG_VIDEO_AU0828_V4L2
421 if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED)
422 au0828_analog_register(dev, interface);
426 retval = au0828_dvb_register(dev);
428 pr_err("%s() au0282_dev_register failed\n",
431 /* Remote controller */
432 au0828_rc_register(dev);
435 * Store the pointer to the au0828_dev so it can be accessed in
436 * au0828_usb_disconnect
438 usb_set_intfdata(interface, dev);
440 pr_info("Registered device AU0828 [%s]\n",
441 dev->board.name == NULL ? "Unset" : dev->board.name);
443 mutex_unlock(&dev->lock);
445 retval = au0828_create_media_graph(dev);
447 pr_err("%s() au0282_dev_register failed to create graph\n",
449 au0828_usb_disconnect(interface);
455 static int au0828_suspend(struct usb_interface *interface,
456 pm_message_t message)
458 struct au0828_dev *dev = usb_get_intfdata(interface);
463 pr_info("Suspend\n");
465 au0828_rc_suspend(dev);
466 au0828_v4l2_suspend(dev);
467 au0828_dvb_suspend(dev);
469 /* FIXME: should suspend also ATV/DTV */
474 static int au0828_resume(struct usb_interface *interface)
476 struct au0828_dev *dev = usb_get_intfdata(interface);
482 /* Power Up the bridge */
483 au0828_write(dev, REG_600, 1 << 4);
485 /* Bring up the GPIO's and supporting devices */
486 au0828_gpio_setup(dev);
488 au0828_rc_resume(dev);
489 au0828_v4l2_resume(dev);
490 au0828_dvb_resume(dev);
492 /* FIXME: should resume also ATV/DTV */
497 static struct usb_driver au0828_usb_driver = {
498 .name = KBUILD_MODNAME,
499 .probe = au0828_usb_probe,
500 .disconnect = au0828_usb_disconnect,
501 .id_table = au0828_usb_id_table,
502 .suspend = au0828_suspend,
503 .resume = au0828_resume,
504 .reset_resume = au0828_resume,
507 static int __init au0828_init(void)
511 if (au0828_debug & 1)
512 pr_info("%s() Debugging is enabled\n", __func__);
514 if (au0828_debug & 2)
515 pr_info("%s() USB Debugging is enabled\n", __func__);
517 if (au0828_debug & 4)
518 pr_info("%s() I2C Debugging is enabled\n", __func__);
520 if (au0828_debug & 8)
521 pr_info("%s() Bridge Debugging is enabled\n",
524 if (au0828_debug & 16)
525 pr_info("%s() IR Debugging is enabled\n",
528 pr_info("au0828 driver loaded\n");
530 ret = usb_register(&au0828_usb_driver);
532 pr_err("usb_register failed, error = %d\n", ret);
537 static void __exit au0828_exit(void)
539 usb_deregister(&au0828_usb_driver);
542 module_init(au0828_init);
543 module_exit(au0828_exit);
545 MODULE_DESCRIPTION("Driver for Auvitek AU0828 based products");
546 MODULE_AUTHOR("Steven Toth <stoth@linuxtv.org>");
547 MODULE_LICENSE("GPL");
548 MODULE_VERSION("0.0.3");