drivers/media/video/au0828/au0828-core.c

   1 /*
   2  *  Driver for the Auvitek USB bridge
   3  *
   4  *  Copyright (c) 2008 Steven Toth <stoth@linuxtv.org>
   5  *
   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.
  10  *
  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  *
  15  *  GNU General Public License for more details.
  16  *
  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.
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/videodev2.h>
  24 #include <media/v4l2-common.h>
  25 #include <linux/mutex.h>
  26
  27 #include "au0828.h"
  28
  29 /*
  30  * 1 = General debug messages
  31  * 2 = USB handling
  32  * 4 = I2C related
  33  * 8 = Bridge related
  34  */
  35 int au0828_debug;
  36 module_param_named(debug, au0828_debug, int, 0644);
  37 MODULE_PARM_DESC(debug, "enable debug messages");
  38
  39 #define _AU0828_BULKPIPE 0x03
  40 #define _BULKPIPESIZE 0xffff
  41
  42 static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
  43         u16 index, unsigned char *cp, u16 size);
  44 static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
  45         u16 index, unsigned char *cp, u16 size);
  46
  47 /* USB Direction */
  48 #define CMD_REQUEST_IN          0x00
  49 #define CMD_REQUEST_OUT         0x01
  50
  51 u32 au0828_readreg(struct au0828_dev *dev, u16 reg)
  52 {
  53         recv_control_msg(dev, CMD_REQUEST_IN, 0, reg, dev->ctrlmsg, 1);
  54         dprintk(8, "%s(0x%x) = 0x%x\n", __func__, reg, dev->ctrlmsg[0]);
  55         return dev->ctrlmsg[0];
  56 }
  57
  58 u32 au0828_writereg(struct au0828_dev *dev, u16 reg, u32 val)
  59 {
  60         dprintk(8, "%s(0x%x, 0x%x)\n", __func__, reg, val);
  61         return send_control_msg(dev, CMD_REQUEST_OUT, val, reg,
  62                                 dev->ctrlmsg, 0);
  63 }
  64
  65 static void cmd_msg_dump(struct au0828_dev *dev)
  66 {
  67         int i;
  68
  69         for (i = 0; i < sizeof(dev->ctrlmsg); i += 16)
  70                 dprintk(2, "%s() %02x %02x %02x %02x %02x %02x %02x %02x "
  71                                 "%02x %02x %02x %02x %02x %02x %02x %02x\n",
  72                         __func__,
  73                         dev->ctrlmsg[i+0], dev->ctrlmsg[i+1],
  74                         dev->ctrlmsg[i+2], dev->ctrlmsg[i+3],
  75                         dev->ctrlmsg[i+4], dev->ctrlmsg[i+5],
  76                         dev->ctrlmsg[i+6], dev->ctrlmsg[i+7],
  77                         dev->ctrlmsg[i+8], dev->ctrlmsg[i+9],
  78                         dev->ctrlmsg[i+10], dev->ctrlmsg[i+11],
  79                         dev->ctrlmsg[i+12], dev->ctrlmsg[i+13],
  80                         dev->ctrlmsg[i+14], dev->ctrlmsg[i+15]);
  81 }
  82
  83 static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value,
  84         u16 index, unsigned char *cp, u16 size)
  85 {
  86         int status = -ENODEV;
  87         mutex_lock(&dev->mutex);
  88         if (dev->usbdev) {
  89
  90                 /* cp must be memory that has been allocated by kmalloc */
  91                 status = usb_control_msg(dev->usbdev,
  92                                 usb_sndctrlpipe(dev->usbdev, 0),
  93                                 request,
  94                                 USB_DIR_OUT | USB_TYPE_VENDOR |
  95                                         USB_RECIP_DEVICE,
  96                                 value, index,
  97                                 cp, size, 1000);
  98
  99                 status = min(status, 0);
 100
 101                 if (status < 0) {
 102                         printk(KERN_ERR "%s() Failed sending control message, error %d.\n",
 103                                 __func__, status);
 104                 }
 105
 106         }
 107         mutex_unlock(&dev->mutex);
 108         return status;
 109 }
 110
 111 static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
 112         u16 index, unsigned char *cp, u16 size)
 113 {
 114         int status = -ENODEV;
 115         mutex_lock(&dev->mutex);
 116         if (dev->usbdev) {
 117
 118                 memset(dev->ctrlmsg, 0, sizeof(dev->ctrlmsg));
 119
 120                 /* cp must be memory that has been allocated by kmalloc */
 121                 status = usb_control_msg(dev->usbdev,
 122                                 usb_rcvctrlpipe(dev->usbdev, 0),
 123                                 request,
 124                                 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 125                                 value, index,
 126                                 cp, size, 1000);
 127
 128                 status = min(status, 0);
 129
 130                 if (status < 0) {
 131                         printk(KERN_ERR "%s() Failed receiving control message, error %d.\n",
 132                                 __func__, status);
 133                 } else
 134                         cmd_msg_dump(dev);
 135         }
 136         mutex_unlock(&dev->mutex);
 137         return status;
 138 }
 139
 140 static void au0828_usb_disconnect(struct usb_interface *interface)
 141 {
 142         struct au0828_dev *dev = usb_get_intfdata(interface);
 143
 144         dprintk(1, "%s()\n", __func__);
 145
 146         /* Digital TV */
 147         au0828_dvb_unregister(dev);
 148
 149         au0828_analog_unregister(dev);
 150
 151         /* I2C */
 152         au0828_i2c_unregister(dev);
 153
 154         usb_set_intfdata(interface, NULL);
 155
 156         mutex_lock(&dev->mutex);
 157         dev->usbdev = NULL;
 158         mutex_unlock(&dev->mutex);
 159
 160         kfree(dev);
 161
 162 }
 163
 164 static int au0828_usb_probe(struct usb_interface *interface,
 165         const struct usb_device_id *id)
 166 {
 167         int ifnum, i;
 168         struct au0828_dev *dev;
 169         struct usb_device *usbdev = interface_to_usbdev(interface);
 170         struct usb_host_interface *iface_desc;
 171         struct usb_endpoint_descriptor *endpoint;
 172
 173         ifnum = interface->altsetting->desc.bInterfaceNumber;
 174
 175         if (ifnum != 0)
 176                 return -ENODEV;
 177
 178         dprintk(1, "%s() vendor id 0x%x device id 0x%x ifnum:%d\n", __func__,
 179                 le16_to_cpu(usbdev->descriptor.idVendor),
 180                 le16_to_cpu(usbdev->descriptor.idProduct),
 181                 ifnum);
 182
 183         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 184         if (dev == NULL) {
 185                 printk(KERN_ERR "%s() Unable to allocate memory\n", __func__);
 186                 return -ENOMEM;
 187         }
 188
 189         mutex_init(&dev->mutex);
 190         mutex_init(&dev->dvb.lock);
 191         dev->usbdev = usbdev;
 192         dev->board = id->driver_info;
 193
 194         usb_set_intfdata(interface, dev);
 195
 196         /* set au0828 usb interface0 to as5 */
 197         usb_set_interface(usbdev,
 198                           interface->cur_altsetting->desc.bInterfaceNumber, 5);
 199
 200         /* Figure out which endpoint has the isoc interface */
 201         iface_desc = interface->cur_altsetting;
 202         for(i = 0; i < iface_desc->desc.bNumEndpoints; i++){
 203                 endpoint = &iface_desc->endpoint[i].desc;
 204                 if(((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN) &&
 205                    ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_ISOC)){
 206
 207                         /* we find our isoc in endpoint */
 208                         u16 tmp = le16_to_cpu(endpoint->wMaxPacketSize);
 209                         dev->max_pkt_size = (tmp & 0x07ff) * (((tmp & 0x1800) >> 11) + 1);
 210                         dev->isoc_in_endpointaddr = endpoint->bEndpointAddress;
 211                 }
 212         }
 213         if(!(dev->isoc_in_endpointaddr)) {
 214                 printk("Could not locate isoc endpoint\n");
 215                 kfree(dev);
 216                 return -ENODEV;
 217         }
 218
 219
 220         /* Power Up the bridge */
 221         au0828_write(dev, REG_600, 1 << 4);
 222
 223         /* Bring up the GPIO's and supporting devices */
 224         au0828_gpio_setup(dev);
 225
 226         /* I2C */
 227         au0828_i2c_register(dev);
 228
 229         /* Setup */
 230         au0828_card_setup(dev);
 231
 232         /* Analog TV */
 233         au0828_analog_register(dev);
 234
 235         /* Digital TV */
 236         au0828_dvb_register(dev);
 237
 238         printk(KERN_INFO "Registered device AU0828 [%s]\n",
 239                 au0828_boards[dev->board].name == NULL ? "Unset" :
 240                 au0828_boards[dev->board].name);
 241
 242         return 0;
 243 }
 244
 245 static struct usb_driver au0828_usb_driver = {
 246         .name           = DRIVER_NAME,
 247         .probe          = au0828_usb_probe,
 248         .disconnect     = au0828_usb_disconnect,
 249         .id_table       = au0828_usb_id_table,
 250 };
 251
 252 static int __init au0828_init(void)
 253 {
 254         int ret;
 255
 256         if (au0828_debug & 1)
 257                 printk(KERN_INFO "%s() Debugging is enabled\n", __func__);
 258
 259         if (au0828_debug & 2)
 260                 printk(KERN_INFO "%s() USB Debugging is enabled\n", __func__);
 261
 262         if (au0828_debug & 4)
 263                 printk(KERN_INFO "%s() I2C Debugging is enabled\n", __func__);
 264
 265         if (au0828_debug & 8)
 266                 printk(KERN_INFO "%s() Bridge Debugging is enabled\n",
 267                        __func__);
 268
 269         printk(KERN_INFO "au0828 driver loaded\n");
 270
 271         ret = usb_register(&au0828_usb_driver);
 272         if (ret)
 273                 printk(KERN_ERR "usb_register failed, error = %d\n", ret);
 274
 275         return ret;
 276 }
 277
 278 static void __exit au0828_exit(void)
 279 {
 280         usb_deregister(&au0828_usb_driver);
 281 }
 282
 283 module_init(au0828_init);
 284 module_exit(au0828_exit);
 285
 286 MODULE_DESCRIPTION("Driver for Auvitek AU0828 based products");
 287 MODULE_AUTHOR("Steven Toth <stoth@linuxtv.org>");
 288 MODULE_LICENSE("GPL");