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Linux/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  * Should you need to contact me, the author, you can do so either by
 24  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
 25  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
 26  */
 27 
 28 #include "iforce.h"
 29 
 30 void iforce_usb_xmit(struct iforce *iforce)
 31 {
 32         int n, c;
 33         unsigned long flags;
 34 
 35         spin_lock_irqsave(&iforce->xmit_lock, flags);
 36 
 37         if (iforce->xmit.head == iforce->xmit.tail) {
 38                 clear_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags);
 39                 spin_unlock_irqrestore(&iforce->xmit_lock, flags);
 40                 return;
 41         }
 42 
 43         ((char *)iforce->out->transfer_buffer)[0] = iforce->xmit.buf[iforce->xmit.tail];
 44         XMIT_INC(iforce->xmit.tail, 1);
 45         n = iforce->xmit.buf[iforce->xmit.tail];
 46         XMIT_INC(iforce->xmit.tail, 1);
 47 
 48         iforce->out->transfer_buffer_length = n + 1;
 49         iforce->out->dev = iforce->usbdev;
 50 
 51         /* Copy rest of data then */
 52         c = CIRC_CNT_TO_END(iforce->xmit.head, iforce->xmit.tail, XMIT_SIZE);
 53         if (n < c) c=n;
 54 
 55         memcpy(iforce->out->transfer_buffer + 1,
 56                &iforce->xmit.buf[iforce->xmit.tail],
 57                c);
 58         if (n != c) {
 59                 memcpy(iforce->out->transfer_buffer + 1 + c,
 60                        &iforce->xmit.buf[0],
 61                        n-c);
 62         }
 63         XMIT_INC(iforce->xmit.tail, n);
 64 
 65         if ( (n=usb_submit_urb(iforce->out, GFP_ATOMIC)) ) {
 66                 clear_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags);
 67                 dev_warn(&iforce->intf->dev, "usb_submit_urb failed %d\n", n);
 68         }
 69 
 70         /* The IFORCE_XMIT_RUNNING bit is not cleared here. That's intended.
 71          * As long as the urb completion handler is not called, the transmiting
 72          * is considered to be running */
 73         spin_unlock_irqrestore(&iforce->xmit_lock, flags);
 74 }
 75 
 76 static void iforce_usb_irq(struct urb *urb)
 77 {
 78         struct iforce *iforce = urb->context;
 79         struct device *dev = &iforce->intf->dev;
 80         int status;
 81 
 82         switch (urb->status) {
 83         case 0:
 84                 /* success */
 85                 break;
 86         case -ECONNRESET:
 87         case -ENOENT:
 88         case -ESHUTDOWN:
 89                 /* this urb is terminated, clean up */
 90                 dev_dbg(dev, "%s - urb shutting down with status: %d\n",
 91                         __func__, urb->status);
 92                 return;
 93         default:
 94                 dev_dbg(dev, "%s - urb has status of: %d\n",
 95                         __func__, urb->status);
 96                 goto exit;
 97         }
 98 
 99         iforce_process_packet(iforce,
100                 (iforce->data[0] << 8) | (urb->actual_length - 1), iforce->data + 1);
101 
102 exit:
103         status = usb_submit_urb (urb, GFP_ATOMIC);
104         if (status)
105                 dev_err(dev, "%s - usb_submit_urb failed with result %d\n",
106                         __func__, status);
107 }
108 
109 static void iforce_usb_out(struct urb *urb)
110 {
111         struct iforce *iforce = urb->context;
112 
113         if (urb->status) {
114                 clear_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags);
115                 dev_dbg(&iforce->intf->dev, "urb->status %d, exiting\n",
116                         urb->status);
117                 return;
118         }
119 
120         iforce_usb_xmit(iforce);
121 
122         wake_up(&iforce->wait);
123 }
124 
125 static void iforce_usb_ctrl(struct urb *urb)
126 {
127         struct iforce *iforce = urb->context;
128         if (urb->status) return;
129         iforce->ecmd = 0xff00 | urb->actual_length;
130         wake_up(&iforce->wait);
131 }
132 
133 static int iforce_usb_probe(struct usb_interface *intf,
134                                 const struct usb_device_id *id)
135 {
136         struct usb_device *dev = interface_to_usbdev(intf);
137         struct usb_host_interface *interface;
138         struct usb_endpoint_descriptor *epirq, *epout;
139         struct iforce *iforce;
140         int err = -ENOMEM;
141 
142         interface = intf->cur_altsetting;
143 
144         epirq = &interface->endpoint[0].desc;
145         epout = &interface->endpoint[1].desc;
146 
147         if (!(iforce = kzalloc(sizeof(struct iforce) + 32, GFP_KERNEL)))
148                 goto fail;
149 
150         if (!(iforce->irq = usb_alloc_urb(0, GFP_KERNEL)))
151                 goto fail;
152 
153         if (!(iforce->out = usb_alloc_urb(0, GFP_KERNEL)))
154                 goto fail;
155 
156         if (!(iforce->ctrl = usb_alloc_urb(0, GFP_KERNEL)))
157                 goto fail;
158 
159         iforce->bus = IFORCE_USB;
160         iforce->usbdev = dev;
161         iforce->intf = intf;
162 
163         iforce->cr.bRequestType = USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_INTERFACE;
164         iforce->cr.wIndex = 0;
165         iforce->cr.wLength = cpu_to_le16(16);
166 
167         usb_fill_int_urb(iforce->irq, dev, usb_rcvintpipe(dev, epirq->bEndpointAddress),
168                         iforce->data, 16, iforce_usb_irq, iforce, epirq->bInterval);
169 
170         usb_fill_int_urb(iforce->out, dev, usb_sndintpipe(dev, epout->bEndpointAddress),
171                         iforce + 1, 32, iforce_usb_out, iforce, epout->bInterval);
172 
173         usb_fill_control_urb(iforce->ctrl, dev, usb_rcvctrlpipe(dev, 0),
174                         (void*) &iforce->cr, iforce->edata, 16, iforce_usb_ctrl, iforce);
175 
176         err = iforce_init_device(iforce);
177         if (err)
178                 goto fail;
179 
180         usb_set_intfdata(intf, iforce);
181         return 0;
182 
183 fail:
184         if (iforce) {
185                 usb_free_urb(iforce->irq);
186                 usb_free_urb(iforce->out);
187                 usb_free_urb(iforce->ctrl);
188                 kfree(iforce);
189         }
190 
191         return err;
192 }
193 
194 static void iforce_usb_disconnect(struct usb_interface *intf)
195 {
196         struct iforce *iforce = usb_get_intfdata(intf);
197 
198         usb_set_intfdata(intf, NULL);
199 
200         input_unregister_device(iforce->dev);
201 
202         usb_free_urb(iforce->irq);
203         usb_free_urb(iforce->out);
204         usb_free_urb(iforce->ctrl);
205 
206         kfree(iforce);
207 }
208 
209 static struct usb_device_id iforce_usb_ids [] = {
210         { USB_DEVICE(0x044f, 0xa01c) },         /* Thrustmaster Motor Sport GT */
211         { USB_DEVICE(0x046d, 0xc281) },         /* Logitech WingMan Force */
212         { USB_DEVICE(0x046d, 0xc291) },         /* Logitech WingMan Formula Force */
213         { USB_DEVICE(0x05ef, 0x020a) },         /* AVB Top Shot Pegasus */
214         { USB_DEVICE(0x05ef, 0x8884) },         /* AVB Mag Turbo Force */
215         { USB_DEVICE(0x05ef, 0x8888) },         /* AVB Top Shot FFB Racing Wheel */
216         { USB_DEVICE(0x061c, 0xc0a4) },         /* ACT LABS Force RS */
217         { USB_DEVICE(0x061c, 0xc084) },         /* ACT LABS Force RS */
218         { USB_DEVICE(0x06f8, 0x0001) },         /* Guillemot Race Leader Force Feedback */
219         { USB_DEVICE(0x06f8, 0x0003) },         /* Guillemot Jet Leader Force Feedback */
220         { USB_DEVICE(0x06f8, 0x0004) },         /* Guillemot Force Feedback Racing Wheel */
221         { USB_DEVICE(0x06f8, 0xa302) },         /* Guillemot Jet Leader 3D */
222         { }                                     /* Terminating entry */
223 };
224 
225 MODULE_DEVICE_TABLE (usb, iforce_usb_ids);
226 
227 struct usb_driver iforce_usb_driver = {
228         .name =         "iforce",
229         .probe =        iforce_usb_probe,
230         .disconnect =   iforce_usb_disconnect,
231         .id_table =     iforce_usb_ids,
232 };
233 

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