1 files changed, 299 insertions, 0 deletions
diff --git a/drivers/input/joystick/iforce/iforce-usb.c b/drivers/input/joystick/iforce/iforce-usb.c
new file mode 100644
index 000000000..cba92bd59
--- /dev/null
+++ b/drivers/input/joystick/iforce/iforce-usb.c
@@ -0,0 +1,299 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+ /*
+ *  Copyright (c) 2000-2002 Vojtech Pavlik <vojtech@ucw.cz>
+ *  Copyright (c) 2001-2002, 2007 Johann Deneux <johann.deneux@gmail.com>
+ *
+ *  USB/RS232 I-Force joysticks and wheels.
+ */
+
+#include <linux/usb.h>
+#include "iforce.h"
+
+struct iforce_usb {
+	struct iforce iforce;
+
+	struct usb_device *usbdev;
+	struct usb_interface *intf;
+	struct urb *irq, *out;
+
+	u8 data_in[IFORCE_MAX_LENGTH] ____cacheline_aligned;
+	u8 data_out[IFORCE_MAX_LENGTH] ____cacheline_aligned;
+};
+
+static void __iforce_usb_xmit(struct iforce *iforce)
+{
+	struct iforce_usb *iforce_usb = container_of(iforce, struct iforce_usb,
+						     iforce);
+	int n, c;
+	unsigned long flags;
+
+	spin_lock_irqsave(&iforce->xmit_lock, flags);
+
+	if (iforce->xmit.head == iforce->xmit.tail) {
+		iforce_clear_xmit_and_wake(iforce);
+		spin_unlock_irqrestore(&iforce->xmit_lock, flags);
+		return;
+	}
+
+	((char *)iforce_usb->out->transfer_buffer)[0] = iforce->xmit.buf[iforce->xmit.tail];
+	XMIT_INC(iforce->xmit.tail, 1);
+	n = iforce->xmit.buf[iforce->xmit.tail];
+	XMIT_INC(iforce->xmit.tail, 1);
+
+	iforce_usb->out->transfer_buffer_length = n + 1;
+	iforce_usb->out->dev = iforce_usb->usbdev;
+
+	/* Copy rest of data then */
+	c = CIRC_CNT_TO_END(iforce->xmit.head, iforce->xmit.tail, XMIT_SIZE);
+	if (n < c) c=n;
+
+	memcpy(iforce_usb->out->transfer_buffer + 1,
+	       &iforce->xmit.buf[iforce->xmit.tail],
+	       c);
+	if (n != c) {
+		memcpy(iforce_usb->out->transfer_buffer + 1 + c,
+		       &iforce->xmit.buf[0],
+		       n-c);
+	}
+	XMIT_INC(iforce->xmit.tail, n);
+
+	if ( (n=usb_submit_urb(iforce_usb->out, GFP_ATOMIC)) ) {
+		dev_warn(&iforce_usb->intf->dev,
+			 "usb_submit_urb failed %d\n", n);
+		iforce_clear_xmit_and_wake(iforce);
+	}
+
+	/* The IFORCE_XMIT_RUNNING bit is not cleared here. That's intended.
+	 * As long as the urb completion handler is not called, the transmiting
+	 * is considered to be running */
+	spin_unlock_irqrestore(&iforce->xmit_lock, flags);
+}
+
+static void iforce_usb_xmit(struct iforce *iforce)
+{
+	if (!test_and_set_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags))
+		__iforce_usb_xmit(iforce);
+}
+
+static int iforce_usb_get_id(struct iforce *iforce, u8 id,
+			     u8 *response_data, size_t *response_len)
+{
+	struct iforce_usb *iforce_usb = container_of(iforce, struct iforce_usb,
+						     iforce);
+	u8 *buf;
+	int status;
+
+	buf = kmalloc(IFORCE_MAX_LENGTH, GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	status = usb_control_msg(iforce_usb->usbdev,
+				 usb_rcvctrlpipe(iforce_usb->usbdev, 0),
+				 id,
+				 USB_TYPE_VENDOR | USB_DIR_IN |
+					USB_RECIP_INTERFACE,
+				 0, 0, buf, IFORCE_MAX_LENGTH, 1000);
+	if (status < 0) {
+		dev_err(&iforce_usb->intf->dev,
+			"usb_submit_urb failed: %d\n", status);
+	} else if (buf[0] != id) {
+		status = -EIO;
+	} else {
+		memcpy(response_data, buf, status);
+		*response_len = status;
+		status = 0;
+	}
+
+	kfree(buf);
+	return status;
+}
+
+static int iforce_usb_start_io(struct iforce *iforce)
+{
+	struct iforce_usb *iforce_usb = container_of(iforce, struct iforce_usb,
+						     iforce);
+
+	if (usb_submit_urb(iforce_usb->irq, GFP_KERNEL))
+		return -EIO;
+
+	return 0;
+}
+
+static void iforce_usb_stop_io(struct iforce *iforce)
+{
+	struct iforce_usb *iforce_usb = container_of(iforce, struct iforce_usb,
+						     iforce);
+
+	usb_kill_urb(iforce_usb->irq);
+	usb_kill_urb(iforce_usb->out);
+}
+
+static const struct iforce_xport_ops iforce_usb_xport_ops = {
+	.xmit		= iforce_usb_xmit,
+	.get_id		= iforce_usb_get_id,
+	.start_io	= iforce_usb_start_io,
+	.stop_io	= iforce_usb_stop_io,
+};
+
+static void iforce_usb_irq(struct urb *urb)
+{
+	struct iforce_usb *iforce_usb = urb->context;
+	struct iforce *iforce = &iforce_usb->iforce;
+	struct device *dev = &iforce_usb->intf->dev;
+	int status;
+
+	switch (urb->status) {
+	case 0:
+		/* success */
+		break;
+	case -ECONNRESET:
+	case -ENOENT:
+	case -ESHUTDOWN:
+		/* this urb is terminated, clean up */
+		dev_dbg(dev, "%s - urb shutting down with status: %d\n",
+			__func__, urb->status);
+		return;
+	default:
+		dev_dbg(dev, "%s - urb has status of: %d\n",
+			__func__, urb->status);
+		goto exit;
+	}
+
+	iforce_process_packet(iforce, iforce_usb->data_in[0],
+			      iforce_usb->data_in + 1, urb->actual_length - 1);
+
+exit:
+	status = usb_submit_urb(urb, GFP_ATOMIC);
+	if (status)
+		dev_err(dev, "%s - usb_submit_urb failed with result %d\n",
+			__func__, status);
+}
+
+static void iforce_usb_out(struct urb *urb)
+{
+	struct iforce_usb *iforce_usb = urb->context;
+	struct iforce *iforce = &iforce_usb->iforce;
+
+	if (urb->status) {
+		dev_dbg(&iforce_usb->intf->dev, "urb->status %d, exiting\n",
+			urb->status);
+		iforce_clear_xmit_and_wake(iforce);
+		return;
+	}
+
+	__iforce_usb_xmit(iforce);
+
+	wake_up_all(&iforce->wait);
+}
+
+static int iforce_usb_probe(struct usb_interface *intf,
+				const struct usb_device_id *id)
+{
+	struct usb_device *dev = interface_to_usbdev(intf);
+	struct usb_host_interface *interface;
+	struct usb_endpoint_descriptor *epirq, *epout;
+	struct iforce_usb *iforce_usb;
+	int err = -ENOMEM;
+
+	interface = intf->cur_altsetting;
+
+	if (interface->desc.bNumEndpoints < 2)
+		return -ENODEV;
+
+	epirq = &interface->endpoint[0].desc;
+	if (!usb_endpoint_is_int_in(epirq))
+		return -ENODEV;
+
+	epout = &interface->endpoint[1].desc;
+	if (!usb_endpoint_is_int_out(epout))
+		return -ENODEV;
+
+	iforce_usb = kzalloc(sizeof(*iforce_usb), GFP_KERNEL);
+	if (!iforce_usb)
+		goto fail;
+
+	iforce_usb->irq = usb_alloc_urb(0, GFP_KERNEL);
+	if (!iforce_usb->irq)
+		goto fail;
+
+	iforce_usb->out = usb_alloc_urb(0, GFP_KERNEL);
+	if (!iforce_usb->out)
+		goto fail;
+
+	iforce_usb->iforce.xport_ops = &iforce_usb_xport_ops;
+
+	iforce_usb->usbdev = dev;
+	iforce_usb->intf = intf;
+
+	usb_fill_int_urb(iforce_usb->irq, dev,
+			 usb_rcvintpipe(dev, epirq->bEndpointAddress),
+			 iforce_usb->data_in, sizeof(iforce_usb->data_in),
+			 iforce_usb_irq, iforce_usb, epirq->bInterval);
+
+	usb_fill_int_urb(iforce_usb->out, dev,
+			 usb_sndintpipe(dev, epout->bEndpointAddress),
+			 iforce_usb->data_out, sizeof(iforce_usb->data_out),
+			 iforce_usb_out, iforce_usb, epout->bInterval);
+
+	err = iforce_init_device(&intf->dev, BUS_USB, &iforce_usb->iforce);
+	if (err)
+		goto fail;
+
+	usb_set_intfdata(intf, iforce_usb);
+	return 0;
+
+fail:
+	if (iforce_usb) {
+		usb_free_urb(iforce_usb->irq);
+		usb_free_urb(iforce_usb->out);
+		kfree(iforce_usb);
+	}
+
+	return err;
+}
+
+static void iforce_usb_disconnect(struct usb_interface *intf)
+{
+	struct iforce_usb *iforce_usb = usb_get_intfdata(intf);
+
+	usb_set_intfdata(intf, NULL);
+
+	input_unregister_device(iforce_usb->iforce.dev);
+
+	usb_free_urb(iforce_usb->irq);
+	usb_free_urb(iforce_usb->out);
+
+	kfree(iforce_usb);
+}
+
+static const struct usb_device_id iforce_usb_ids[] = {
+	{ USB_DEVICE(0x044f, 0xa01c) },		/* Thrustmaster Motor Sport GT */
+	{ USB_DEVICE(0x046d, 0xc281) },		/* Logitech WingMan Force */
+	{ USB_DEVICE(0x046d, 0xc291) },		/* Logitech WingMan Formula Force */
+	{ USB_DEVICE(0x05ef, 0x020a) },		/* AVB Top Shot Pegasus */
+	{ USB_DEVICE(0x05ef, 0x8884) },		/* AVB Mag Turbo Force */
+	{ USB_DEVICE(0x05ef, 0x8888) },		/* AVB Top Shot FFB Racing Wheel */
+	{ USB_DEVICE(0x061c, 0xc0a4) },         /* ACT LABS Force RS */
+	{ USB_DEVICE(0x061c, 0xc084) },         /* ACT LABS Force RS */
+	{ USB_DEVICE(0x06a3, 0xff04) },		/* Saitek R440 Force Wheel */
+	{ USB_DEVICE(0x06f8, 0x0001) },		/* Guillemot Race Leader Force Feedback */
+	{ USB_DEVICE(0x06f8, 0x0003) },		/* Guillemot Jet Leader Force Feedback */
+	{ USB_DEVICE(0x06f8, 0x0004) },		/* Guillemot Force Feedback Racing Wheel */
+	{ USB_DEVICE(0x06f8, 0xa302) },		/* Guillemot Jet Leader 3D */
+	{ }					/* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE (usb, iforce_usb_ids);
+
+struct usb_driver iforce_usb_driver = {
+	.name =		"iforce",
+	.probe =	iforce_usb_probe,
+	.disconnect =	iforce_usb_disconnect,
+	.id_table =	iforce_usb_ids,
+};
+
+module_usb_driver(iforce_usb_driver);
+
+MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>, Johann Deneux <johann.deneux@gmail.com>");
+MODULE_DESCRIPTION("USB I-Force joysticks and wheels driver");
+MODULE_LICENSE("GPL");