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 /* 10 */ 11 12 #include "iforce.h" 13 14 void iforce_usb_xmit(struct iforce *iforce) 15 { 16 int n, c; 17 unsigned long flags; 18 19 spin_lock_irqsave(&iforce->xmit_lock, flags); 20 21 if (iforce->xmit.head == iforce->xmit.tail) { 22 clear_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags); 23 spin_unlock_irqrestore(&iforce->xmit_lock, flags); 24 return; 25 } 26 27 ((char *)iforce->out->transfer_buffer)[0] = iforce->xmit.buf[iforce->xmit.tail]; 28 XMIT_INC(iforce->xmit.tail, 1); 29 n = iforce->xmit.buf[iforce->xmit.tail]; 30 XMIT_INC(iforce->xmit.tail, 1); 31 32 iforce->out->transfer_buffer_length = n + 1; 33 iforce->out->dev = iforce->usbdev; 34 35 /* Copy rest of data then */ 36 c = CIRC_CNT_TO_END(iforce->xmit.head, iforce->xmit.tail, XMIT_SIZE); 37 if (n < c) c=n; 38 39 memcpy(iforce->out->transfer_buffer + 1, 40 &iforce->xmit.buf[iforce->xmit.tail], 41 c); 42 if (n != c) { 43 memcpy(iforce->out->transfer_buffer + 1 + c, 44 &iforce->xmit.buf[0], 45 n-c); 46 } 47 XMIT_INC(iforce->xmit.tail, n); 48 49 if ( (n=usb_submit_urb(iforce->out, GFP_ATOMIC)) ) { 50 clear_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags); 51 dev_warn(&iforce->intf->dev, "usb_submit_urb failed %d\n", n); 52 } 53 54 /* The IFORCE_XMIT_RUNNING bit is not cleared here. That's intended. 55 * As long as the urb completion handler is not called, the transmiting 56 * is considered to be running */ 57 spin_unlock_irqrestore(&iforce->xmit_lock, flags); 58 } 59 60 static void iforce_usb_irq(struct urb *urb) 61 { 62 struct iforce *iforce = urb->context; 63 struct device *dev = &iforce->intf->dev; 64 int status; 65 66 switch (urb->status) { 67 case 0: 68 /* success */ 69 break; 70 case -ECONNRESET: 71 case -ENOENT: 72 case -ESHUTDOWN: 73 /* this urb is terminated, clean up */ 74 dev_dbg(dev, "%s - urb shutting down with status: %d\n", 75 __func__, urb->status); 76 return; 77 default: 78 dev_dbg(dev, "%s - urb has status of: %d\n", 79 __func__, urb->status); 80 goto exit; 81 } 82 83 iforce_process_packet(iforce, 84 (iforce->data[0] << 8) | (urb->actual_length - 1), iforce->data + 1); 85 86 exit: 87 status = usb_submit_urb (urb, GFP_ATOMIC); 88 if (status) 89 dev_err(dev, "%s - usb_submit_urb failed with result %d\n", 90 __func__, status); 91 } 92 93 static void iforce_usb_out(struct urb *urb) 94 { 95 struct iforce *iforce = urb->context; 96 97 if (urb->status) { 98 clear_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags); 99 dev_dbg(&iforce->intf->dev, "urb->status %d, exiting\n", 100 urb->status); 101 return; 102 } 103 104 iforce_usb_xmit(iforce); 105 106 wake_up(&iforce->wait); 107 } 108 109 static void iforce_usb_ctrl(struct urb *urb) 110 { 111 struct iforce *iforce = urb->context; 112 if (urb->status) return; 113 iforce->ecmd = 0xff00 | urb->actual_length; 114 wake_up(&iforce->wait); 115 } 116 117 static int iforce_usb_probe(struct usb_interface *intf, 118 const struct usb_device_id *id) 119 { 120 struct usb_device *dev = interface_to_usbdev(intf); 121 struct usb_host_interface *interface; 122 struct usb_endpoint_descriptor *epirq, *epout; 123 struct iforce *iforce; 124 int err = -ENOMEM; 125 126 interface = intf->cur_altsetting; 127 128 if (interface->desc.bNumEndpoints < 2) 129 return -ENODEV; 130 131 epirq = &interface->endpoint[0].desc; 132 epout = &interface->endpoint[1].desc; 133 134 if (!(iforce = kzalloc(sizeof(struct iforce) + 32, GFP_KERNEL))) 135 goto fail; 136 137 if (!(iforce->irq = usb_alloc_urb(0, GFP_KERNEL))) 138 goto fail; 139 140 if (!(iforce->out = usb_alloc_urb(0, GFP_KERNEL))) 141 goto fail; 142 143 if (!(iforce->ctrl = usb_alloc_urb(0, GFP_KERNEL))) 144 goto fail; 145 146 iforce->bus = IFORCE_USB; 147 iforce->usbdev = dev; 148 iforce->intf = intf; 149 150 iforce->cr.bRequestType = USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_INTERFACE; 151 iforce->cr.wIndex = 0; 152 iforce->cr.wLength = cpu_to_le16(16); 153 154 usb_fill_int_urb(iforce->irq, dev, usb_rcvintpipe(dev, epirq->bEndpointAddress), 155 iforce->data, 16, iforce_usb_irq, iforce, epirq->bInterval); 156 157 usb_fill_int_urb(iforce->out, dev, usb_sndintpipe(dev, epout->bEndpointAddress), 158 iforce + 1, 32, iforce_usb_out, iforce, epout->bInterval); 159 160 usb_fill_control_urb(iforce->ctrl, dev, usb_rcvctrlpipe(dev, 0), 161 (void*) &iforce->cr, iforce->edata, 16, iforce_usb_ctrl, iforce); 162 163 err = iforce_init_device(iforce); 164 if (err) 165 goto fail; 166 167 usb_set_intfdata(intf, iforce); 168 return 0; 169 170 fail: 171 if (iforce) { 172 usb_free_urb(iforce->irq); 173 usb_free_urb(iforce->out); 174 usb_free_urb(iforce->ctrl); 175 kfree(iforce); 176 } 177 178 return err; 179 } 180 181 static void iforce_usb_disconnect(struct usb_interface *intf) 182 { 183 struct iforce *iforce = usb_get_intfdata(intf); 184 185 usb_set_intfdata(intf, NULL); 186 187 input_unregister_device(iforce->dev); 188 189 usb_free_urb(iforce->irq); 190 usb_free_urb(iforce->out); 191 usb_free_urb(iforce->ctrl); 192 193 kfree(iforce); 194 } 195 196 static const struct usb_device_id iforce_usb_ids[] = { 197 { USB_DEVICE(0x044f, 0xa01c) }, /* Thrustmaster Motor Sport GT */ 198 { USB_DEVICE(0x046d, 0xc281) }, /* Logitech WingMan Force */ 199 { USB_DEVICE(0x046d, 0xc291) }, /* Logitech WingMan Formula Force */ 200 { USB_DEVICE(0x05ef, 0x020a) }, /* AVB Top Shot Pegasus */ 201 { USB_DEVICE(0x05ef, 0x8884) }, /* AVB Mag Turbo Force */ 202 { USB_DEVICE(0x05ef, 0x8888) }, /* AVB Top Shot FFB Racing Wheel */ 203 { USB_DEVICE(0x061c, 0xc0a4) }, /* ACT LABS Force RS */ 204 { USB_DEVICE(0x061c, 0xc084) }, /* ACT LABS Force RS */ 205 { USB_DEVICE(0x06f8, 0x0001) }, /* Guillemot Race Leader Force Feedback */ 206 { USB_DEVICE(0x06f8, 0x0003) }, /* Guillemot Jet Leader Force Feedback */ 207 { USB_DEVICE(0x06f8, 0x0004) }, /* Guillemot Force Feedback Racing Wheel */ 208 { USB_DEVICE(0x06f8, 0xa302) }, /* Guillemot Jet Leader 3D */ 209 { } /* Terminating entry */ 210 }; 211 212 MODULE_DEVICE_TABLE (usb, iforce_usb_ids); 213 214 struct usb_driver iforce_usb_driver = { 215 .name = "iforce", 216 .probe = iforce_usb_probe, 217 .disconnect = iforce_usb_disconnect, 218 .id_table = iforce_usb_ids, 219 }; 220