--- /dev/null
+/*
+ * IgorPlug-USB IR Receiver
+ *
+ * Copyright (C) 2014 Sean Young <sean@mess.org>
+ *
+ * Supports the standard homebrew IgorPlugUSB receiver with Igor's firmware.
+ * See http://www.cesko.host.sk/IgorPlugUSB/IgorPlug-USB%20(AVR)_eng.htm
+ *
+ * Based on the lirc_igorplugusb.c driver:
+ * Copyright (C) 2004 Jan M. Hochstein
+ * <hochstein@algo.informatik.tu-darmstadt.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/usb.h>
+#include <linux/usb/input.h>
+#include <media/rc-core.h>
+
+#define DRIVER_DESC "IgorPlug-USB IR Receiver"
+#define DRIVER_NAME "igorplugusb"
+
+#define HEADERLEN 3
+#define BUFLEN 36
+#define MAX_PACKET (HEADERLEN + BUFLEN)
+
+#define SET_INFRABUFFER_EMPTY 1
+#define GET_INFRACODE 2
+
+
+struct igorplugusb {
+ struct rc_dev *rc;
+ struct device *dev;
+
+ struct urb *urb;
+ struct usb_ctrlrequest request;
+
+ struct timer_list timer;
+
+ uint8_t buf_in[MAX_PACKET];
+
+ char phys[64];
+};
+
+static void igorplugusb_cmd(struct igorplugusb *ir, int cmd);
+
+static void igorplugusb_irdata(struct igorplugusb *ir, unsigned len)
+{
+ DEFINE_IR_RAW_EVENT(rawir);
+ unsigned i, start, overflow;
+
+ dev_dbg(ir->dev, "irdata: %*ph (len=%u)", len, ir->buf_in, len);
+
+ /*
+ * If more than 36 pulses and spaces follow each other, the igorplugusb
+ * overwrites its buffer from the beginning. The overflow value is the
+ * last offset which was not overwritten. Everything from this offset
+ * onwards occurred before everything until this offset.
+ */
+ overflow = ir->buf_in[2];
+ i = start = overflow + HEADERLEN;
+
+ if (start >= len) {
+ dev_err(ir->dev, "receive overflow invalid: %u", overflow);
+ } else {
+ if (overflow > 0)
+ dev_warn(ir->dev, "receive overflow, at least %u lost",
+ overflow);
+
+ do {
+ rawir.duration = ir->buf_in[i] * 85333;
+ rawir.pulse = i & 1;
+
+ ir_raw_event_store_with_filter(ir->rc, &rawir);
+
+ if (++i == len)
+ i = HEADERLEN;
+ } while (i != start);
+
+ /* add a trailing space */
+ rawir.duration = ir->rc->timeout;
+ rawir.pulse = false;
+ ir_raw_event_store_with_filter(ir->rc, &rawir);
+
+ ir_raw_event_handle(ir->rc);
+ }
+
+ igorplugusb_cmd(ir, SET_INFRABUFFER_EMPTY);
+}
+
+static void igorplugusb_callback(struct urb *urb)
+{
+ struct usb_ctrlrequest *req;
+ struct igorplugusb *ir = urb->context;
+
+ req = (struct usb_ctrlrequest *)urb->setup_packet;
+
+ switch (urb->status) {
+ case 0:
+ if (req->bRequest == GET_INFRACODE &&
+ urb->actual_length > HEADERLEN)
+ igorplugusb_irdata(ir, urb->actual_length);
+ else /* request IR */
+ mod_timer(&ir->timer, jiffies + msecs_to_jiffies(50));
+ break;
+ case -EPROTO:
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ usb_unlink_urb(urb);
+ return;
+ default:
+ dev_warn(ir->dev, "Error: urb status = %d\n", urb->status);
+ igorplugusb_cmd(ir, SET_INFRABUFFER_EMPTY);
+ break;
+ }
+}
+
+static void igorplugusb_cmd(struct igorplugusb *ir, int cmd)
+{
+ int ret;
+
+ ir->request.bRequest = cmd;
+ ir->urb->transfer_flags = 0;
+ ret = usb_submit_urb(ir->urb, GFP_ATOMIC);
+ if (ret)
+ dev_err(ir->dev, "submit urb failed: %d", ret);
+}
+
+static void igorplugusb_timer(unsigned long data)
+{
+ struct igorplugusb *ir = (struct igorplugusb *)data;
+
+ igorplugusb_cmd(ir, GET_INFRACODE);
+}
+
+static int igorplugusb_probe(struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ struct usb_device *udev;
+ struct usb_host_interface *idesc;
+ struct usb_endpoint_descriptor *ep;
+ struct igorplugusb *ir;
+ struct rc_dev *rc;
+ int ret;
+
+ udev = interface_to_usbdev(intf);
+ idesc = intf->cur_altsetting;
+
+ if (idesc->desc.bNumEndpoints != 1) {
+ dev_err(&intf->dev, "incorrect number of endpoints");
+ return -ENODEV;
+ }
+
+ ep = &idesc->endpoint[0].desc;
+ if (!usb_endpoint_dir_in(ep) || !usb_endpoint_xfer_control(ep)) {
+ dev_err(&intf->dev, "endpoint incorrect");
+ return -ENODEV;
+ }
+
+ ir = devm_kzalloc(&intf->dev, sizeof(*ir), GFP_KERNEL);
+ if (!ir)
+ return -ENOMEM;
+
+ ir->dev = &intf->dev;
+
+ setup_timer(&ir->timer, igorplugusb_timer, (unsigned long)ir);
+
+ ir->request.bRequest = GET_INFRACODE;
+ ir->request.bRequestType = USB_TYPE_VENDOR | USB_DIR_IN;
+ ir->request.wLength = cpu_to_le16(sizeof(ir->buf_in));
+
+ ir->urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!ir->urb)
+ return -ENOMEM;
+
+ usb_fill_control_urb(ir->urb, udev,
+ usb_rcvctrlpipe(udev, 0), (uint8_t *)&ir->request,
+ ir->buf_in, sizeof(ir->buf_in), igorplugusb_callback, ir);
+
+ usb_make_path(udev, ir->phys, sizeof(ir->phys));
+
+ rc = rc_allocate_device();
+ rc->input_name = DRIVER_DESC;
+ rc->input_phys = ir->phys;
+ usb_to_input_id(udev, &rc->input_id);
+ rc->dev.parent = &intf->dev;
+ rc->driver_type = RC_DRIVER_IR_RAW;
+ /*
+ * This device can only store 36 pulses + spaces, which is not enough
+ * for the NEC protocol and many others.
+ */
+ rc->allowed_protocols = RC_BIT_ALL & ~(RC_BIT_NEC | RC_BIT_RC6_6A_20 |
+ RC_BIT_RC6_6A_24 | RC_BIT_RC6_6A_32 | RC_BIT_RC6_MCE |
+ RC_BIT_SONY20 | RC_BIT_MCE_KBD | RC_BIT_SANYO);
+
+ rc->priv = ir;
+ rc->driver_name = DRIVER_NAME;
+ rc->map_name = RC_MAP_HAUPPAUGE;
+ rc->timeout = MS_TO_NS(100);
+ rc->rx_resolution = 85333;
+
+ ir->rc = rc;
+ ret = rc_register_device(rc);
+ if (ret) {
+ dev_err(&intf->dev, "failed to register rc device: %d", ret);
+ rc_free_device(rc);
+ usb_free_urb(ir->urb);
+ return ret;
+ }
+
+ usb_set_intfdata(intf, ir);
+
+ igorplugusb_cmd(ir, SET_INFRABUFFER_EMPTY);
+
+ return 0;
+}
+
+static void igorplugusb_disconnect(struct usb_interface *intf)
+{
+ struct igorplugusb *ir = usb_get_intfdata(intf);
+
+ rc_unregister_device(ir->rc);
+ del_timer_sync(&ir->timer);
+ usb_set_intfdata(intf, NULL);
+ usb_kill_urb(ir->urb);
+ usb_free_urb(ir->urb);
+}
+
+static struct usb_device_id igorplugusb_table[] = {
+ /* Igor Plug USB (Atmel's Manufact. ID) */
+ { USB_DEVICE(0x03eb, 0x0002) },
+ /* Fit PC2 Infrared Adapter */
+ { USB_DEVICE(0x03eb, 0x21fe) },
+ /* Terminating entry */
+ { }
+};
+
+static struct usb_driver igorplugusb_driver = {
+ .name = DRIVER_NAME,
+ .probe = igorplugusb_probe,
+ .disconnect = igorplugusb_disconnect,
+ .id_table = igorplugusb_table
+};
+
+module_usb_driver(igorplugusb_driver);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_AUTHOR("Sean Young <sean@mess.org>");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(usb, igorplugusb_table);
Code Review / kvmfornfv.git / blobdiff