drivers/input/joystick/iforce/iforce-usb.c

   1  /*
   2  *  Copyright (c) 2000-2002 Vojtech Pavlik <vojtech@ucw.cz>
   3  *  Copyright (c) 2001-2002, 2007 Johann Deneux <johann.deneux@gmail.com>
   4  *
   5  *  USB/RS232 I-Force joysticks and wheels.
   6  */
   7
   8 /*
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  22  */
  23
  24 #include "iforce.h"
  25
  26 struct iforce_usb {
  27         struct iforce iforce;
  28
  29         struct usb_device *usbdev;
  30         struct usb_interface *intf;
  31         struct urb *irq, *out, *ctrl;
  32         struct usb_ctrlrequest cr;
  33 };
  34
  35 static void __iforce_usb_xmit(struct iforce *iforce)
  36 {
  37         struct iforce_usb *iforce_usb = container_of(iforce, struct iforce_usb,
  38                                                      iforce);
  39         int n, c;
  40         unsigned long flags;
  41
  42         spin_lock_irqsave(&iforce->xmit_lock, flags);
  43
  44         if (iforce->xmit.head == iforce->xmit.tail) {
  45                 clear_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags);
  46                 spin_unlock_irqrestore(&iforce->xmit_lock, flags);
  47                 return;
  48         }
  49
  50         ((char *)iforce_usb->out->transfer_buffer)[0] = iforce->xmit.buf[iforce->xmit.tail];
  51         XMIT_INC(iforce->xmit.tail, 1);
  52         n = iforce->xmit.buf[iforce->xmit.tail];
  53         XMIT_INC(iforce->xmit.tail, 1);
  54
  55         iforce_usb->out->transfer_buffer_length = n + 1;
  56         iforce_usb->out->dev = iforce_usb->usbdev;
  57
  58         /* Copy rest of data then */
  59         c = CIRC_CNT_TO_END(iforce->xmit.head, iforce->xmit.tail, XMIT_SIZE);
  60         if (n < c) c=n;
  61
  62         memcpy(iforce_usb->out->transfer_buffer + 1,
  63                &iforce->xmit.buf[iforce->xmit.tail],
  64                c);
  65         if (n != c) {
  66                 memcpy(iforce_usb->out->transfer_buffer + 1 + c,
  67                        &iforce->xmit.buf[0],
  68                        n-c);
  69         }
  70         XMIT_INC(iforce->xmit.tail, n);
  71
  72         if ( (n=usb_submit_urb(iforce_usb->out, GFP_ATOMIC)) ) {
  73                 clear_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags);
  74                 dev_warn(&iforce_usb->intf->dev,
  75                          "usb_submit_urb failed %d\n", n);
  76         }
  77
  78         /* The IFORCE_XMIT_RUNNING bit is not cleared here. That's intended.
  79          * As long as the urb completion handler is not called, the transmiting
  80          * is considered to be running */
  81         spin_unlock_irqrestore(&iforce->xmit_lock, flags);
  82 }
  83
  84 static void iforce_usb_xmit(struct iforce *iforce)
  85 {
  86         if (!test_and_set_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags))
  87                 __iforce_usb_xmit(iforce);
  88 }
  89
  90 static int iforce_usb_get_id(struct iforce *iforce, u8 *packet)
  91 {
  92         struct iforce_usb *iforce_usb = container_of(iforce, struct iforce_usb,
  93                                                      iforce);
  94         int status;
  95
  96         iforce_usb->cr.bRequest = packet[0];
  97         iforce_usb->ctrl->dev = iforce_usb->usbdev;
  98
  99         status = usb_submit_urb(iforce_usb->ctrl, GFP_KERNEL);
 100         if (status) {
 101                 dev_err(&iforce_usb->intf->dev,
 102                         "usb_submit_urb failed %d\n", status);
 103                 return -EIO;
 104         }
 105
 106         wait_event_interruptible_timeout(iforce->wait,
 107                 iforce_usb->ctrl->status != -EINPROGRESS, HZ);
 108
 109         if (iforce_usb->ctrl->status) {
 110                 dev_dbg(&iforce_usb->intf->dev,
 111                         "iforce->ctrl->status = %d\n",
 112                         iforce_usb->ctrl->status);
 113                 usb_unlink_urb(iforce_usb->ctrl);
 114                 return -EIO;
 115         }
 116
 117         return -(iforce->edata[0] != packet[0]);
 118 }
 119
 120 static int iforce_usb_start_io(struct iforce *iforce)
 121 {
 122         struct iforce_usb *iforce_usb = container_of(iforce, struct iforce_usb,
 123                                                      iforce);
 124
 125         if (usb_submit_urb(iforce_usb->irq, GFP_KERNEL))
 126                 return -EIO;
 127
 128         return 0;
 129 }
 130
 131 static void iforce_usb_stop_io(struct iforce *iforce)
 132 {
 133         struct iforce_usb *iforce_usb = container_of(iforce, struct iforce_usb,
 134                                                      iforce);
 135
 136         usb_kill_urb(iforce_usb->irq);
 137         usb_kill_urb(iforce_usb->out);
 138         usb_kill_urb(iforce_usb->ctrl);
 139 }
 140
 141 static const struct iforce_xport_ops iforce_usb_xport_ops = {
 142         .xmit           = iforce_usb_xmit,
 143         .get_id         = iforce_usb_get_id,
 144         .start_io       = iforce_usb_start_io,
 145         .stop_io        = iforce_usb_stop_io,
 146 };
 147
 148 static void iforce_usb_irq(struct urb *urb)
 149 {
 150         struct iforce_usb *iforce_usb = urb->context;
 151         struct iforce *iforce = &iforce_usb->iforce;
 152         struct device *dev = &iforce_usb->intf->dev;
 153         int status;
 154
 155         switch (urb->status) {
 156         case 0:
 157                 /* success */
 158                 break;
 159         case -ECONNRESET:
 160         case -ENOENT:
 161         case -ESHUTDOWN:
 162                 /* this urb is terminated, clean up */
 163                 dev_dbg(dev, "%s - urb shutting down with status: %d\n",
 164                         __func__, urb->status);
 165                 return;
 166         default:
 167                 dev_dbg(dev, "%s - urb has status of: %d\n",
 168                         __func__, urb->status);
 169                 goto exit;
 170         }
 171
 172         iforce_process_packet(iforce,
 173                 (iforce->data[0] << 8) | (urb->actual_length - 1), iforce->data + 1);
 174
 175 exit:
 176         status = usb_submit_urb(urb, GFP_ATOMIC);
 177         if (status)
 178                 dev_err(dev, "%s - usb_submit_urb failed with result %d\n",
 179                         __func__, status);
 180 }
 181
 182 static void iforce_usb_out(struct urb *urb)
 183 {
 184         struct iforce_usb *iforce_usb = urb->context;
 185         struct iforce *iforce = &iforce_usb->iforce;
 186
 187         if (urb->status) {
 188                 clear_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags);
 189                 dev_dbg(&iforce_usb->intf->dev, "urb->status %d, exiting\n",
 190                         urb->status);
 191                 return;
 192         }
 193
 194         __iforce_usb_xmit(iforce);
 195
 196         wake_up(&iforce->wait);
 197 }
 198
 199 static void iforce_usb_ctrl(struct urb *urb)
 200 {
 201         struct iforce_usb *iforce_usb = urb->context;
 202         struct iforce *iforce = &iforce_usb->iforce;
 203
 204         if (urb->status)
 205                 return;
 206
 207         iforce->ecmd = 0xff00 | urb->actual_length;
 208         wake_up(&iforce->wait);
 209 }
 210
 211 static int iforce_usb_probe(struct usb_interface *intf,
 212                                 const struct usb_device_id *id)
 213 {
 214         struct usb_device *dev = interface_to_usbdev(intf);
 215         struct usb_host_interface *interface;
 216         struct usb_endpoint_descriptor *epirq, *epout;
 217         struct iforce_usb *iforce_usb;
 218         struct iforce *iforce;
 219         int err = -ENOMEM;
 220
 221         interface = intf->cur_altsetting;
 222
 223         if (interface->desc.bNumEndpoints < 2)
 224                 return -ENODEV;
 225
 226         epirq = &interface->endpoint[0].desc;
 227         epout = &interface->endpoint[1].desc;
 228
 229         if (!(iforce_usb = kzalloc(sizeof(*iforce_usb) + 32, GFP_KERNEL)))
 230                 goto fail;
 231
 232         if (!(iforce_usb->irq = usb_alloc_urb(0, GFP_KERNEL)))
 233                 goto fail;
 234
 235         if (!(iforce_usb->out = usb_alloc_urb(0, GFP_KERNEL)))
 236                 goto fail;
 237
 238         if (!(iforce_usb->ctrl = usb_alloc_urb(0, GFP_KERNEL)))
 239                 goto fail;
 240
 241         iforce = &iforce_usb->iforce;
 242
 243         iforce->xport_ops = &iforce_usb_xport_ops;
 244         iforce->bus = IFORCE_USB;
 245
 246         iforce_usb->usbdev = dev;
 247         iforce_usb->intf = intf;
 248
 249         iforce_usb->cr.bRequestType = USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_INTERFACE;
 250         iforce_usb->cr.wIndex = 0;
 251         iforce_usb->cr.wLength = cpu_to_le16(16);
 252
 253         usb_fill_int_urb(iforce_usb->irq, dev, usb_rcvintpipe(dev, epirq->bEndpointAddress),
 254                         iforce->data, 16, iforce_usb_irq, iforce_usb, epirq->bInterval);
 255
 256         usb_fill_int_urb(iforce_usb->out, dev, usb_sndintpipe(dev, epout->bEndpointAddress),
 257                         iforce_usb + 1, 32, iforce_usb_out, iforce_usb, epout->bInterval);
 258
 259         usb_fill_control_urb(iforce_usb->ctrl, dev, usb_rcvctrlpipe(dev, 0),
 260                         (void*) &iforce_usb->cr, iforce->edata, 16, iforce_usb_ctrl, iforce_usb);
 261
 262         err = iforce_init_device(&intf->dev, BUS_USB, iforce);
 263         if (err)
 264                 goto fail;
 265
 266         usb_set_intfdata(intf, iforce_usb);
 267         return 0;
 268
 269 fail:
 270         if (iforce_usb) {
 271                 usb_free_urb(iforce_usb->irq);
 272                 usb_free_urb(iforce_usb->out);
 273                 usb_free_urb(iforce_usb->ctrl);
 274                 kfree(iforce_usb);
 275         }
 276
 277         return err;
 278 }
 279
 280 static void iforce_usb_disconnect(struct usb_interface *intf)
 281 {
 282         struct iforce_usb *iforce_usb = usb_get_intfdata(intf);
 283
 284         usb_set_intfdata(intf, NULL);
 285
 286         input_unregister_device(iforce_usb->iforce.dev);
 287
 288         usb_free_urb(iforce_usb->irq);
 289         usb_free_urb(iforce_usb->out);
 290         usb_free_urb(iforce_usb->ctrl);
 291
 292         kfree(iforce_usb);
 293 }
 294
 295 static const struct usb_device_id iforce_usb_ids[] = {
 296         { USB_DEVICE(0x044f, 0xa01c) },         /* Thrustmaster Motor Sport GT */
 297         { USB_DEVICE(0x046d, 0xc281) },         /* Logitech WingMan Force */
 298         { USB_DEVICE(0x046d, 0xc291) },         /* Logitech WingMan Formula Force */
 299         { USB_DEVICE(0x05ef, 0x020a) },         /* AVB Top Shot Pegasus */
 300         { USB_DEVICE(0x05ef, 0x8884) },         /* AVB Mag Turbo Force */
 301         { USB_DEVICE(0x05ef, 0x8888) },         /* AVB Top Shot FFB Racing Wheel */
 302         { USB_DEVICE(0x061c, 0xc0a4) },         /* ACT LABS Force RS */
 303         { USB_DEVICE(0x061c, 0xc084) },         /* ACT LABS Force RS */
 304         { USB_DEVICE(0x06f8, 0x0001) },         /* Guillemot Race Leader Force Feedback */
 305         { USB_DEVICE(0x06f8, 0x0003) },         /* Guillemot Jet Leader Force Feedback */
 306         { USB_DEVICE(0x06f8, 0x0004) },         /* Guillemot Force Feedback Racing Wheel */
 307         { USB_DEVICE(0x06f8, 0xa302) },         /* Guillemot Jet Leader 3D */
 308         { }                                     /* Terminating entry */
 309 };
 310
 311 MODULE_DEVICE_TABLE (usb, iforce_usb_ids);
 312
 313 struct usb_driver iforce_usb_driver = {
 314         .name =         "iforce",
 315         .probe =        iforce_usb_probe,
 316         .disconnect =   iforce_usb_disconnect,
 317         .id_table =     iforce_usb_ids,
 318 };