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