drivers/media/dvb/dibusb/dvb-dibusb-usb.c

   1 /*
   2  * dvb-dibusb-usb.c is part of the driver for mobile USB Budget DVB-T devices
   3  * based on reference design made by DiBcom (http://www.dibcom.fr/)
   4  *
   5  * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@desy.de)
   6  *
   7  * see dvb-dibusb-core.c for more copyright details.
   8  *
   9  * This file contains functions for initializing and handling the
  10  * usb specific stuff.
  11  */
  12 #include "dvb-dibusb.h"
  13
  14 #include <linux/version.h>
  15 #include <linux/pci.h>
  16
  17 int dibusb_readwrite_usb(struct usb_dibusb *dib, u8 *wbuf, u16 wlen, u8 *rbuf,
  18                 u16 rlen)
  19 {
  20         int actlen,ret = -ENOMEM;
  21
  22         if (wbuf == NULL || wlen == 0)
  23                 return -EINVAL;
  24
  25         if ((ret = down_interruptible(&dib->usb_sem)))
  26                 return ret;
  27
  28         debug_dump(wbuf,wlen);
  29
  30         ret = usb_bulk_msg(dib->udev,usb_sndbulkpipe(dib->udev,
  31                         dib->dibdev->dev_cl->pipe_cmd), wbuf,wlen,&actlen,
  32                         DIBUSB_I2C_TIMEOUT);
  33
  34         if (ret)
  35                 err("bulk message failed: %d (%d/%d)",ret,wlen,actlen);
  36         else
  37                 ret = actlen != wlen ? -1 : 0;
  38
  39         /* an answer is expected, and no error before */
  40         if (!ret && rbuf && rlen) {
  41                 ret = usb_bulk_msg(dib->udev,usb_rcvbulkpipe(dib->udev,
  42                                 dib->dibdev->dev_cl->pipe_cmd),rbuf,rlen,&actlen,
  43                                 DIBUSB_I2C_TIMEOUT);
  44
  45                 if (ret)
  46                         err("recv bulk message failed: %d",ret);
  47                 else {
  48                         deb_alot("rlen: %d\n",rlen);
  49                         debug_dump(rbuf,actlen);
  50                 }
  51         }
  52
  53         up(&dib->usb_sem);
  54         return ret;
  55 }
  56
  57 /*
  58  * Cypress controls
  59  */
  60 int dibusb_write_usb(struct usb_dibusb *dib, u8 *buf, u16 len)
  61 {
  62         return dibusb_readwrite_usb(dib,buf,len,NULL,0);
  63 }
  64
  65 #if 0
  66 /*
  67  * #if 0'ing the following functions as they are not in use _now_,
  68  * but probably will be sometime.
  69  */
  70 /*
  71  * do not use this, just a workaround for a bug,
  72  * which will hopefully never occur :).
  73  */
  74 int dibusb_interrupt_read_loop(struct usb_dibusb *dib)
  75 {
  76         u8 b[1] = { DIBUSB_REQ_INTR_READ };
  77         return dibusb_write_usb(dib,b,1);
  78 }
  79 #endif
  80
  81 /*
  82  * ioctl for the firmware
  83  */
  84 static int dibusb_ioctl_cmd(struct usb_dibusb *dib, u8 cmd, u8 *param, int plen)
  85 {
  86         u8 b[34];
  87         int size = plen > 32 ? 32 : plen;
  88         memset(b,0,34);
  89         b[0] = DIBUSB_REQ_SET_IOCTL;
  90         b[1] = cmd;
  91
  92         if (size > 0)
  93                 memcpy(&b[2],param,size);
  94
  95         return dibusb_write_usb(dib,b,34); //2+size);
  96 }
  97
  98 /*
  99  * ioctl for power control
 100  */
 101 int dibusb_hw_wakeup(struct dvb_frontend *fe)
 102 {
 103         struct usb_dibusb *dib = (struct usb_dibusb *) fe->dvb->priv;
 104         u8 b[1] = { DIBUSB_IOCTL_POWER_WAKEUP };
 105         deb_info("dibusb-device is getting up.\n");
 106
 107         switch (dib->dibdev->dev_cl->id) {
 108                 case DTT200U:
 109                         break;
 110                 default:
 111                         dibusb_ioctl_cmd(dib,DIBUSB_IOCTL_CMD_POWER_MODE, b,1);
 112                         break;
 113         }
 114
 115         if (dib->fe_init)
 116                 return dib->fe_init(fe);
 117
 118         return 0;
 119 }
 120
 121 int dibusb_hw_sleep(struct dvb_frontend *fe)
 122 {
 123         struct usb_dibusb *dib = (struct usb_dibusb *) fe->dvb->priv;
 124         u8 b[1] = { DIBUSB_IOCTL_POWER_SLEEP };
 125         deb_info("dibusb-device is going to bed.\n");
 126         /* workaround, something is wrong, when dibusb 1.1 device are going to bed too late */
 127         switch (dib->dibdev->dev_cl->id) {
 128                 case DIBUSB1_1:
 129                 case NOVAT_USB2:
 130                 case DTT200U:
 131                         break;
 132                 default:
 133                         dibusb_ioctl_cmd(dib,DIBUSB_IOCTL_CMD_POWER_MODE, b,1);
 134                         break;
 135         }
 136         if (dib->fe_sleep)
 137                 return dib->fe_sleep(fe);
 138
 139         return 0;
 140 }
 141
 142 int dibusb_set_streaming_mode(struct usb_dibusb *dib,u8 mode)
 143 {
 144         u8 b[2] = { DIBUSB_REQ_SET_STREAMING_MODE, mode };
 145         return dibusb_readwrite_usb(dib,b,2,NULL,0);
 146 }
 147
 148 static int dibusb_urb_kill(struct usb_dibusb *dib)
 149 {
 150         int i;
 151 deb_info("trying to kill urbs\n");
 152         if (dib->init_state & DIBUSB_STATE_URB_SUBMIT) {
 153                 for (i = 0; i < dib->dibdev->dev_cl->urb_count; i++) {
 154                         deb_info("killing URB no. %d.\n",i);
 155
 156                         /* stop the URB */
 157                         usb_kill_urb(dib->urb_list[i]);
 158                 }
 159         } else
 160         deb_info(" URBs not killed.\n");
 161         dib->init_state &= ~DIBUSB_STATE_URB_SUBMIT;
 162         return 0;
 163 }
 164
 165 static int dibusb_urb_submit(struct usb_dibusb *dib)
 166 {
 167         int i,ret;
 168         if (dib->init_state & DIBUSB_STATE_URB_INIT) {
 169                 for (i = 0; i < dib->dibdev->dev_cl->urb_count; i++) {
 170                         deb_info("submitting URB no. %d\n",i);
 171                         if ((ret = usb_submit_urb(dib->urb_list[i],GFP_ATOMIC))) {
 172                                 err("could not submit buffer urb no. %d - get them all back\n",i);
 173                                 dibusb_urb_kill(dib);
 174                                 return ret;
 175                         }
 176                         dib->init_state |= DIBUSB_STATE_URB_SUBMIT;
 177                 }
 178         }
 179         return 0;
 180 }
 181
 182 int dibusb_streaming(struct usb_dibusb *dib,int onoff)
 183 {
 184         if (onoff)
 185                 dibusb_urb_submit(dib);
 186         else
 187                 dibusb_urb_kill(dib);
 188
 189         switch (dib->dibdev->dev_cl->id) {
 190                 case DIBUSB2_0:
 191                 case DIBUSB2_0B:
 192                 case NOVAT_USB2:
 193                 case UMT2_0:
 194                         if (onoff)
 195                                 return dibusb_ioctl_cmd(dib,DIBUSB_IOCTL_CMD_ENABLE_STREAM,NULL,0);
 196                         else
 197                                 return dibusb_ioctl_cmd(dib,DIBUSB_IOCTL_CMD_DISABLE_STREAM,NULL,0);
 198                         break;
 199                 default:
 200                         break;
 201         }
 202         return 0;
 203 }
 204
 205 int dibusb_urb_init(struct usb_dibusb *dib)
 206 {
 207         int i,bufsize,def_pid_parse = 1;
 208
 209         /*
 210          * when reloading the driver w/o replugging the device
 211          * a timeout occures, this helps
 212          */
 213         usb_clear_halt(dib->udev,usb_sndbulkpipe(dib->udev,dib->dibdev->dev_cl->pipe_cmd));
 214         usb_clear_halt(dib->udev,usb_rcvbulkpipe(dib->udev,dib->dibdev->dev_cl->pipe_cmd));
 215         usb_clear_halt(dib->udev,usb_rcvbulkpipe(dib->udev,dib->dibdev->dev_cl->pipe_data));
 216
 217         /* allocate the array for the data transfer URBs */
 218         dib->urb_list = kmalloc(dib->dibdev->dev_cl->urb_count*sizeof(struct urb *),GFP_KERNEL);
 219         if (dib->urb_list == NULL)
 220                 return -ENOMEM;
 221         memset(dib->urb_list,0,dib->dibdev->dev_cl->urb_count*sizeof(struct urb *));
 222
 223         dib->init_state |= DIBUSB_STATE_URB_LIST;
 224
 225         bufsize = dib->dibdev->dev_cl->urb_count*dib->dibdev->dev_cl->urb_buffer_size;
 226         deb_info("allocate %d bytes as buffersize for all URBs\n",bufsize);
 227         /* allocate the actual buffer for the URBs */
 228         if ((dib->buffer = pci_alloc_consistent(NULL,bufsize,&dib->dma_handle)) == NULL) {
 229                 deb_info("not enough memory.\n");
 230                 return -ENOMEM;
 231         }
 232         deb_info("allocation complete\n");
 233         memset(dib->buffer,0,bufsize);
 234
 235         dib->init_state |= DIBUSB_STATE_URB_BUF;
 236
 237         /* allocate and submit the URBs */
 238         for (i = 0; i < dib->dibdev->dev_cl->urb_count; i++) {
 239                 if (!(dib->urb_list[i] = usb_alloc_urb(0,GFP_ATOMIC))) {
 240                         return -ENOMEM;
 241                 }
 242
 243                 usb_fill_bulk_urb( dib->urb_list[i], dib->udev,
 244                                 usb_rcvbulkpipe(dib->udev,dib->dibdev->dev_cl->pipe_data),
 245                                 &dib->buffer[i*dib->dibdev->dev_cl->urb_buffer_size],
 246                                 dib->dibdev->dev_cl->urb_buffer_size,
 247                                 dibusb_urb_complete, dib);
 248
 249                 dib->urb_list[i]->transfer_flags = 0;
 250
 251                 dib->init_state |= DIBUSB_STATE_URB_INIT;
 252         }
 253
 254         /* dib->pid_parse here contains the value of the module parameter */
 255         /* decide if pid parsing can be deactivated:
 256          * is possible (by device type) and wanted (by user)
 257          */
 258         switch (dib->dibdev->dev_cl->id) {
 259                 case DIBUSB2_0:
 260                 case DIBUSB2_0B:
 261                         if (dib->udev->speed == USB_SPEED_HIGH && !dib->pid_parse) {
 262                                 def_pid_parse = 0;
 263                                 info("running at HIGH speed, will deliver the complete TS.");
 264                         } else
 265                                 info("will use pid_parsing.");
 266                         break;
 267                 default:
 268                         break;
 269         }
 270         /* from here on it contains the device and user decision */
 271         dib->pid_parse = def_pid_parse;
 272
 273         return 0;
 274 }
 275
 276 int dibusb_urb_exit(struct usb_dibusb *dib)
 277 {
 278         int i;
 279
 280         dibusb_urb_kill(dib);
 281
 282         if (dib->init_state & DIBUSB_STATE_URB_LIST) {
 283                 for (i = 0; i < dib->dibdev->dev_cl->urb_count; i++) {
 284                         if (dib->urb_list[i] != NULL) {
 285                                 deb_info("freeing URB no. %d.\n",i);
 286                                 /* free the URBs */
 287                                 usb_free_urb(dib->urb_list[i]);
 288                         }
 289                 }
 290                 /* free the urb array */
 291                 kfree(dib->urb_list);
 292                 dib->init_state &= ~DIBUSB_STATE_URB_LIST;
 293         }
 294
 295         if (dib->init_state & DIBUSB_STATE_URB_BUF)
 296                 pci_free_consistent(NULL,
 297                         dib->dibdev->dev_cl->urb_buffer_size*dib->dibdev->dev_cl->urb_count,
 298                         dib->buffer,dib->dma_handle);
 299
 300         dib->init_state &= ~DIBUSB_STATE_URB_BUF;
 301         dib->init_state &= ~DIBUSB_STATE_URB_INIT;
 302         return 0;
 303 }