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

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2  /*
   3  *  Copyright (c) 2000-2002 Vojtech Pavlik <vojtech@ucw.cz>
   4  *  Copyright (c) 2001-2002, 2007 Johann Deneux <johann.deneux@gmail.com>
   5  *
   6  *  USB/RS232 I-Force joysticks and wheels.
   7  */
   8
   9 #include <linux/usb.h>
  10 #include "iforce.h"
  11
  12 struct iforce_usb {
  13         struct iforce iforce;
  14
  15         struct usb_device *usbdev;
  16         struct usb_interface *intf;
  17         struct urb *irq, *out;
  18
  19         u8 data_in[IFORCE_MAX_LENGTH] ____cacheline_aligned;
  20         u8 data_out[IFORCE_MAX_LENGTH] ____cacheline_aligned;
  21 };
  22
  23 static void __iforce_usb_xmit(struct iforce *iforce)
  24 {
  25         struct iforce_usb *iforce_usb = container_of(iforce, struct iforce_usb,
  26                                                      iforce);
  27         int n, c;
  28         unsigned long flags;
  29
  30         spin_lock_irqsave(&iforce->xmit_lock, flags);
  31
  32         if (iforce->xmit.head == iforce->xmit.tail) {
  33                 clear_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags);
  34                 spin_unlock_irqrestore(&iforce->xmit_lock, flags);
  35                 return;
  36         }
  37
  38         ((char *)iforce_usb->out->transfer_buffer)[0] = iforce->xmit.buf[iforce->xmit.tail];
  39         XMIT_INC(iforce->xmit.tail, 1);
  40         n = iforce->xmit.buf[iforce->xmit.tail];
  41         XMIT_INC(iforce->xmit.tail, 1);
  42
  43         iforce_usb->out->transfer_buffer_length = n + 1;
  44         iforce_usb->out->dev = iforce_usb->usbdev;
  45
  46         /* Copy rest of data then */
  47         c = CIRC_CNT_TO_END(iforce->xmit.head, iforce->xmit.tail, XMIT_SIZE);
  48         if (n < c) c=n;
  49
  50         memcpy(iforce_usb->out->transfer_buffer + 1,
  51                &iforce->xmit.buf[iforce->xmit.tail],
  52                c);
  53         if (n != c) {
  54                 memcpy(iforce_usb->out->transfer_buffer + 1 + c,
  55                        &iforce->xmit.buf[0],
  56                        n-c);
  57         }
  58         XMIT_INC(iforce->xmit.tail, n);
  59
  60         if ( (n=usb_submit_urb(iforce_usb->out, GFP_ATOMIC)) ) {
  61                 clear_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags);
  62                 dev_warn(&iforce_usb->intf->dev,
  63                          "usb_submit_urb failed %d\n", n);
  64         }
  65
  66         /* The IFORCE_XMIT_RUNNING bit is not cleared here. That's intended.
  67          * As long as the urb completion handler is not called, the transmiting
  68          * is considered to be running */
  69         spin_unlock_irqrestore(&iforce->xmit_lock, flags);
  70 }
  71
  72 static void iforce_usb_xmit(struct iforce *iforce)
  73 {
  74         if (!test_and_set_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags))
  75                 __iforce_usb_xmit(iforce);
  76 }
  77
  78 static int iforce_usb_get_id(struct iforce *iforce, u8 id,
  79                              u8 *response_data, size_t *response_len)
  80 {
  81         struct iforce_usb *iforce_usb = container_of(iforce, struct iforce_usb,
  82                                                      iforce);
  83         u8 *buf;
  84         int status;
  85
  86         buf = kmalloc(IFORCE_MAX_LENGTH, GFP_KERNEL);
  87         if (!buf)
  88                 return -ENOMEM;
  89
  90         status = usb_control_msg(iforce_usb->usbdev,
  91                                  usb_rcvctrlpipe(iforce_usb->usbdev, 0),
  92                                  id,
  93                                  USB_TYPE_VENDOR | USB_DIR_IN |
  94                                         USB_RECIP_INTERFACE,
  95                                  0, 0, buf, IFORCE_MAX_LENGTH, HZ);
  96         if (status < 0) {
  97                 dev_err(&iforce_usb->intf->dev,
  98                         "usb_submit_urb failed: %d\n", status);
  99         } else if (buf[0] != id) {
 100                 status = -EIO;
 101         } else {
 102                 memcpy(response_data, buf, status);
 103                 *response_len = status;
 104                 status = 0;
 105         }
 106
 107         kfree(buf);
 108         return status;
 109 }
 110
 111 static int iforce_usb_start_io(struct iforce *iforce)
 112 {
 113         struct iforce_usb *iforce_usb = container_of(iforce, struct iforce_usb,
 114                                                      iforce);
 115
 116         if (usb_submit_urb(iforce_usb->irq, GFP_KERNEL))
 117                 return -EIO;
 118
 119         return 0;
 120 }
 121
 122 static void iforce_usb_stop_io(struct iforce *iforce)
 123 {
 124         struct iforce_usb *iforce_usb = container_of(iforce, struct iforce_usb,
 125                                                      iforce);
 126
 127         usb_kill_urb(iforce_usb->irq);
 128         usb_kill_urb(iforce_usb->out);
 129 }
 130
 131 static const struct iforce_xport_ops iforce_usb_xport_ops = {
 132         .xmit           = iforce_usb_xmit,
 133         .get_id         = iforce_usb_get_id,
 134         .start_io       = iforce_usb_start_io,
 135         .stop_io        = iforce_usb_stop_io,
 136 };
 137
 138 static void iforce_usb_irq(struct urb *urb)
 139 {
 140         struct iforce_usb *iforce_usb = urb->context;
 141         struct iforce *iforce = &iforce_usb->iforce;
 142         struct device *dev = &iforce_usb->intf->dev;
 143         int status;
 144
 145         switch (urb->status) {
 146         case 0:
 147                 /* success */
 148                 break;
 149         case -ECONNRESET:
 150         case -ENOENT:
 151         case -ESHUTDOWN:
 152                 /* this urb is terminated, clean up */
 153                 dev_dbg(dev, "%s - urb shutting down with status: %d\n",
 154                         __func__, urb->status);
 155                 return;
 156         default:
 157                 dev_dbg(dev, "%s - urb has status of: %d\n",
 158                         __func__, urb->status);
 159                 goto exit;
 160         }
 161
 162         iforce_process_packet(iforce, iforce_usb->data_in[0],
 163                               iforce_usb->data_in + 1, urb->actual_length - 1);
 164
 165 exit:
 166         status = usb_submit_urb(urb, GFP_ATOMIC);
 167         if (status)
 168                 dev_err(dev, "%s - usb_submit_urb failed with result %d\n",
 169                         __func__, status);
 170 }
 171
 172 static void iforce_usb_out(struct urb *urb)
 173 {
 174         struct iforce_usb *iforce_usb = urb->context;
 175         struct iforce *iforce = &iforce_usb->iforce;
 176
 177         if (urb->status) {
 178                 clear_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags);
 179                 dev_dbg(&iforce_usb->intf->dev, "urb->status %d, exiting\n",
 180                         urb->status);
 181                 return;
 182         }
 183
 184         __iforce_usb_xmit(iforce);
 185
 186         wake_up(&iforce->wait);
 187 }
 188
 189 static int iforce_usb_probe(struct usb_interface *intf,
 190                                 const struct usb_device_id *id)
 191 {
 192         struct usb_device *dev = interface_to_usbdev(intf);
 193         struct usb_host_interface *interface;
 194         struct usb_endpoint_descriptor *epirq, *epout;
 195         struct iforce_usb *iforce_usb;
 196         int err = -ENOMEM;
 197
 198         interface = intf->cur_altsetting;
 199
 200         if (interface->desc.bNumEndpoints < 2)
 201                 return -ENODEV;
 202
 203         epirq = &interface->endpoint[0].desc;
 204         epout = &interface->endpoint[1].desc;
 205
 206         iforce_usb = kzalloc(sizeof(*iforce_usb), GFP_KERNEL);
 207         if (!iforce_usb)
 208                 goto fail;
 209
 210         iforce_usb->irq = usb_alloc_urb(0, GFP_KERNEL);
 211         if (!iforce_usb->irq)
 212                 goto fail;
 213
 214         iforce_usb->out = usb_alloc_urb(0, GFP_KERNEL);
 215         if (!iforce_usb->out)
 216                 goto fail;
 217
 218         iforce_usb->iforce.xport_ops = &iforce_usb_xport_ops;
 219
 220         iforce_usb->usbdev = dev;
 221         iforce_usb->intf = intf;
 222
 223         usb_fill_int_urb(iforce_usb->irq, dev,
 224                          usb_rcvintpipe(dev, epirq->bEndpointAddress),
 225                          iforce_usb->data_in, sizeof(iforce_usb->data_in),
 226                          iforce_usb_irq, iforce_usb, epirq->bInterval);
 227
 228         usb_fill_int_urb(iforce_usb->out, dev,
 229                          usb_sndintpipe(dev, epout->bEndpointAddress),
 230                          iforce_usb->data_out, sizeof(iforce_usb->data_out),
 231                          iforce_usb_out, iforce_usb, epout->bInterval);
 232
 233         err = iforce_init_device(&intf->dev, BUS_USB, &iforce_usb->iforce);
 234         if (err)
 235                 goto fail;
 236
 237         usb_set_intfdata(intf, iforce_usb);
 238         return 0;
 239
 240 fail:
 241         if (iforce_usb) {
 242                 usb_free_urb(iforce_usb->irq);
 243                 usb_free_urb(iforce_usb->out);
 244                 kfree(iforce_usb);
 245         }
 246
 247         return err;
 248 }
 249
 250 static void iforce_usb_disconnect(struct usb_interface *intf)
 251 {
 252         struct iforce_usb *iforce_usb = usb_get_intfdata(intf);
 253
 254         usb_set_intfdata(intf, NULL);
 255
 256         input_unregister_device(iforce_usb->iforce.dev);
 257
 258         usb_free_urb(iforce_usb->irq);
 259         usb_free_urb(iforce_usb->out);
 260
 261         kfree(iforce_usb);
 262 }
 263
 264 static const struct usb_device_id iforce_usb_ids[] = {
 265         { USB_DEVICE(0x044f, 0xa01c) },         /* Thrustmaster Motor Sport GT */
 266         { USB_DEVICE(0x046d, 0xc281) },         /* Logitech WingMan Force */
 267         { USB_DEVICE(0x046d, 0xc291) },         /* Logitech WingMan Formula Force */
 268         { USB_DEVICE(0x05ef, 0x020a) },         /* AVB Top Shot Pegasus */
 269         { USB_DEVICE(0x05ef, 0x8884) },         /* AVB Mag Turbo Force */
 270         { USB_DEVICE(0x05ef, 0x8888) },         /* AVB Top Shot FFB Racing Wheel */
 271         { USB_DEVICE(0x061c, 0xc0a4) },         /* ACT LABS Force RS */
 272         { USB_DEVICE(0x061c, 0xc084) },         /* ACT LABS Force RS */
 273         { USB_DEVICE(0x06a3, 0xff04) },         /* Saitek R440 Force Wheel */
 274         { USB_DEVICE(0x06f8, 0x0001) },         /* Guillemot Race Leader Force Feedback */
 275         { USB_DEVICE(0x06f8, 0x0003) },         /* Guillemot Jet Leader Force Feedback */
 276         { USB_DEVICE(0x06f8, 0x0004) },         /* Guillemot Force Feedback Racing Wheel */
 277         { USB_DEVICE(0x06f8, 0xa302) },         /* Guillemot Jet Leader 3D */
 278         { }                                     /* Terminating entry */
 279 };
 280
 281 MODULE_DEVICE_TABLE (usb, iforce_usb_ids);
 282
 283 struct usb_driver iforce_usb_driver = {
 284         .name =         "iforce",
 285         .probe =        iforce_usb_probe,
 286         .disconnect =   iforce_usb_disconnect,
 287         .id_table =     iforce_usb_ids,
 288 };
 289
 290 module_usb_driver(iforce_usb_driver);
 291
 292 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>, Johann Deneux <johann.deneux@gmail.com>");
 293 MODULE_DESCRIPTION("USB I-Force joysticks and wheels driver");
 294 MODULE_LICENSE("GPL");