* Driver for Phoenix RC Flight Controller Adapter
*
* Copyright (C) 2018 Marcus Folkesson <marcus.folkesson@gmail.com>
- *
*/
#include <linux/kernel.h>
#include <linux/mutex.h>
#include <linux/input.h>
-#define PXRC_VENDOR_ID (0x1781)
-#define PXRC_PRODUCT_ID (0x0898)
-
-static const struct usb_device_id pxrc_table[] = {
- { USB_DEVICE(PXRC_VENDOR_ID, PXRC_PRODUCT_ID) },
- { }
-};
-MODULE_DEVICE_TABLE(usb, pxrc_table);
+#define PXRC_VENDOR_ID 0x1781
+#define PXRC_PRODUCT_ID 0x0898
struct pxrc {
struct input_dev *input;
- struct usb_device *udev;
struct usb_interface *intf;
struct urb *urb;
struct mutex pm_mutex;
bool is_open;
- __u8 epaddr;
char phys[64];
- unsigned char *data;
- size_t bsize;
};
static void pxrc_usb_irq(struct urb *urb)
{
struct pxrc *pxrc = urb->context;
+ u8 *data = urb->transfer_buffer;
int error;
switch (urb->status) {
}
if (urb->actual_length == 8) {
- input_report_abs(pxrc->input, ABS_X, pxrc->data[0]);
- input_report_abs(pxrc->input, ABS_Y, pxrc->data[2]);
- input_report_abs(pxrc->input, ABS_RX, pxrc->data[3]);
- input_report_abs(pxrc->input, ABS_RY, pxrc->data[4]);
- input_report_abs(pxrc->input, ABS_RUDDER, pxrc->data[5]);
- input_report_abs(pxrc->input, ABS_THROTTLE, pxrc->data[6]);
- input_report_abs(pxrc->input, ABS_MISC, pxrc->data[7]);
-
- input_report_key(pxrc->input, BTN_A, pxrc->data[1]);
+ input_report_abs(pxrc->input, ABS_X, data[0]);
+ input_report_abs(pxrc->input, ABS_Y, data[2]);
+ input_report_abs(pxrc->input, ABS_RX, data[3]);
+ input_report_abs(pxrc->input, ABS_RY, data[4]);
+ input_report_abs(pxrc->input, ABS_RUDDER, data[5]);
+ input_report_abs(pxrc->input, ABS_THROTTLE, data[6]);
+ input_report_abs(pxrc->input, ABS_MISC, data[7]);
+
+ input_report_key(pxrc->input, BTN_A, data[1]);
}
exit:
mutex_unlock(&pxrc->pm_mutex);
}
-static int pxrc_usb_init(struct pxrc *pxrc)
+static void pxrc_free_urb(void *_pxrc)
{
+ struct pxrc *pxrc = _pxrc;
+
+ usb_free_urb(pxrc->urb);
+}
+
+static int pxrc_probe(struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ struct usb_device *udev = interface_to_usbdev(intf);
+ struct pxrc *pxrc;
struct usb_endpoint_descriptor *epirq;
- unsigned int pipe;
- int retval;
+ size_t xfer_size;
+ void *xfer_buf;
+ int error;
- /* Set up the endpoint information */
- /* This device only has an interrupt endpoint */
- retval = usb_find_common_endpoints(pxrc->intf->cur_altsetting,
- NULL, NULL, &epirq, NULL);
- if (retval) {
- dev_err(&pxrc->intf->dev,
- "Could not find endpoint\n");
- goto error;
+ /*
+ * Locate the endpoint information. This device only has an
+ * interrupt endpoint.
+ */
+ error = usb_find_common_endpoints(intf->cur_altsetting,
+ NULL, NULL, &epirq, NULL);
+ if (error) {
+ dev_err(&intf->dev, "Could not find endpoint\n");
+ return error;
}
- pxrc->bsize = usb_endpoint_maxp(epirq);
- pxrc->epaddr = epirq->bEndpointAddress;
- pxrc->data = devm_kmalloc(&pxrc->intf->dev, pxrc->bsize, GFP_KERNEL);
- if (!pxrc->data) {
- retval = -ENOMEM;
- goto error;
- }
+ pxrc = devm_kzalloc(&intf->dev, sizeof(*pxrc), GFP_KERNEL);
+ if (!pxrc)
+ return -ENOMEM;
- usb_set_intfdata(pxrc->intf, pxrc);
- usb_make_path(pxrc->udev, pxrc->phys, sizeof(pxrc->phys));
- strlcat(pxrc->phys, "/input0", sizeof(pxrc->phys));
+ mutex_init(&pxrc->pm_mutex);
+ pxrc->intf = intf;
- pxrc->urb = usb_alloc_urb(0, GFP_KERNEL);
- if (!pxrc->urb) {
- retval = -ENOMEM;
- goto error;
- }
+ usb_set_intfdata(pxrc->intf, pxrc);
- pipe = usb_rcvintpipe(pxrc->udev, pxrc->epaddr),
- usb_fill_int_urb(pxrc->urb, pxrc->udev, pipe, pxrc->data, pxrc->bsize,
- pxrc_usb_irq, pxrc, 1);
+ xfer_size = usb_endpoint_maxp(epirq);
+ xfer_buf = devm_kmalloc(&intf->dev, xfer_size, GFP_KERNEL);
+ if (!xfer_buf)
+ return -ENOMEM;
-error:
- return retval;
+ pxrc->urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!pxrc->urb)
+ return -ENOMEM;
+ error = devm_add_action_or_reset(&intf->dev, pxrc_free_urb, pxrc);
+ if (error)
+ return error;
-}
+ usb_fill_int_urb(pxrc->urb, udev,
+ usb_rcvintpipe(udev, epirq->bEndpointAddress),
+ xfer_buf, xfer_size, pxrc_usb_irq, pxrc, 1);
-static int pxrc_input_init(struct pxrc *pxrc)
-{
- pxrc->input = devm_input_allocate_device(&pxrc->intf->dev);
- if (pxrc->input == NULL) {
- dev_err(&pxrc->intf->dev, "couldn't allocate input device\n");
+ pxrc->input = devm_input_allocate_device(&intf->dev);
+ if (!pxrc->input) {
+ dev_err(&intf->dev, "couldn't allocate input device\n");
return -ENOMEM;
}
pxrc->input->name = "PXRC Flight Controller Adapter";
+
+ usb_make_path(udev, pxrc->phys, sizeof(pxrc->phys));
+ strlcat(pxrc->phys, "/input0", sizeof(pxrc->phys));
pxrc->input->phys = pxrc->phys;
- usb_to_input_id(pxrc->udev, &pxrc->input->id);
+
+ usb_to_input_id(udev, &pxrc->input->id);
pxrc->input->open = pxrc_open;
pxrc->input->close = pxrc_close;
input_set_drvdata(pxrc->input, pxrc);
- return input_register_device(pxrc->input);
-}
-
-static int pxrc_probe(struct usb_interface *intf,
- const struct usb_device_id *id)
-{
- struct pxrc *pxrc;
- int retval;
-
- pxrc = devm_kzalloc(&intf->dev, sizeof(*pxrc), GFP_KERNEL);
- if (!pxrc)
- return -ENOMEM;
-
- mutex_init(&pxrc->pm_mutex);
- pxrc->udev = usb_get_dev(interface_to_usbdev(intf));
- pxrc->intf = intf;
-
- retval = pxrc_usb_init(pxrc);
- if (retval)
- goto error;
-
- retval = pxrc_input_init(pxrc);
- if (retval)
- goto err_free_urb;
+ error = input_register_device(pxrc->input);
+ if (error)
+ return error;
return 0;
-
-err_free_urb:
- usb_free_urb(pxrc->urb);
-
-error:
- return retval;
}
static void pxrc_disconnect(struct usb_interface *intf)
{
- struct pxrc *pxrc = usb_get_intfdata(intf);
-
- usb_free_urb(pxrc->urb);
- usb_set_intfdata(intf, NULL);
+ /* All driver resources are devm-managed. */
}
static int pxrc_suspend(struct usb_interface *intf, pm_message_t message)
return pxrc_resume(intf);
}
+static const struct usb_device_id pxrc_table[] = {
+ { USB_DEVICE(PXRC_VENDOR_ID, PXRC_PRODUCT_ID) },
+ { }
+};
+MODULE_DEVICE_TABLE(usb, pxrc_table);
+
static struct usb_driver pxrc_driver = {
.name = "pxrc",
.probe = pxrc_probe,
projects / linux-2.6-microblaze.git / blobdiff