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260 lines
6.2 KiB
260 lines
6.2 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* IgorPlug-USB IR Receiver |
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* |
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* Copyright (C) 2014 Sean Young <[email protected]> |
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* |
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* Supports the standard homebrew IgorPlugUSB receiver with Igor's firmware. |
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* See http://www.cesko.host.sk/IgorPlugUSB/IgorPlug-USB%20(AVR)_eng.htm |
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* |
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* Based on the lirc_igorplugusb.c driver: |
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* Copyright (C) 2004 Jan M. Hochstein |
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* <[email protected]> |
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*/ |
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#include <linux/device.h> |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/usb.h> |
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#include <linux/usb/input.h> |
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#include <media/rc-core.h> |
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#define DRIVER_DESC "IgorPlug-USB IR Receiver" |
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#define DRIVER_NAME "igorplugusb" |
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#define HEADERLEN 3 |
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#define BUFLEN 36 |
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#define MAX_PACKET (HEADERLEN + BUFLEN) |
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#define SET_INFRABUFFER_EMPTY 1 |
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#define GET_INFRACODE 2 |
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struct igorplugusb { |
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struct rc_dev *rc; |
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struct device *dev; |
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struct urb *urb; |
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struct usb_ctrlrequest request; |
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struct timer_list timer; |
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uint8_t buf_in[MAX_PACKET]; |
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char phys[64]; |
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}; |
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static void igorplugusb_cmd(struct igorplugusb *ir, int cmd); |
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static void igorplugusb_irdata(struct igorplugusb *ir, unsigned len) |
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{ |
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struct ir_raw_event rawir = {}; |
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unsigned i, start, overflow; |
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dev_dbg(ir->dev, "irdata: %*ph (len=%u)", len, ir->buf_in, len); |
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/* |
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* If more than 36 pulses and spaces follow each other, the igorplugusb |
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* overwrites its buffer from the beginning. The overflow value is the |
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* last offset which was not overwritten. Everything from this offset |
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* onwards occurred before everything until this offset. |
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*/ |
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overflow = ir->buf_in[2]; |
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i = start = overflow + HEADERLEN; |
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if (start >= len) { |
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dev_err(ir->dev, "receive overflow invalid: %u", overflow); |
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} else { |
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if (overflow > 0) |
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dev_warn(ir->dev, "receive overflow, at least %u lost", |
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overflow); |
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do { |
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rawir.duration = ir->buf_in[i] * 85; |
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rawir.pulse = i & 1; |
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ir_raw_event_store_with_filter(ir->rc, &rawir); |
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if (++i == len) |
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i = HEADERLEN; |
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} while (i != start); |
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/* add a trailing space */ |
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rawir.duration = ir->rc->timeout; |
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rawir.pulse = false; |
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ir_raw_event_store_with_filter(ir->rc, &rawir); |
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ir_raw_event_handle(ir->rc); |
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} |
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igorplugusb_cmd(ir, SET_INFRABUFFER_EMPTY); |
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} |
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static void igorplugusb_callback(struct urb *urb) |
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{ |
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struct usb_ctrlrequest *req; |
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struct igorplugusb *ir = urb->context; |
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req = (struct usb_ctrlrequest *)urb->setup_packet; |
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switch (urb->status) { |
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case 0: |
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if (req->bRequest == GET_INFRACODE && |
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urb->actual_length > HEADERLEN) |
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igorplugusb_irdata(ir, urb->actual_length); |
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else /* request IR */ |
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mod_timer(&ir->timer, jiffies + msecs_to_jiffies(50)); |
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break; |
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case -EPROTO: |
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case -ECONNRESET: |
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case -ENOENT: |
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case -ESHUTDOWN: |
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usb_unlink_urb(urb); |
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return; |
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default: |
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dev_warn(ir->dev, "Error: urb status = %d\n", urb->status); |
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igorplugusb_cmd(ir, SET_INFRABUFFER_EMPTY); |
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break; |
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} |
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} |
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static void igorplugusb_cmd(struct igorplugusb *ir, int cmd) |
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{ |
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int ret; |
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ir->request.bRequest = cmd; |
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ir->urb->transfer_flags = 0; |
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ret = usb_submit_urb(ir->urb, GFP_ATOMIC); |
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if (ret) |
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dev_err(ir->dev, "submit urb failed: %d", ret); |
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} |
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static void igorplugusb_timer(struct timer_list *t) |
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{ |
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struct igorplugusb *ir = from_timer(ir, t, timer); |
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igorplugusb_cmd(ir, GET_INFRACODE); |
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} |
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static int igorplugusb_probe(struct usb_interface *intf, |
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const struct usb_device_id *id) |
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{ |
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struct usb_device *udev; |
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struct usb_host_interface *idesc; |
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struct usb_endpoint_descriptor *ep; |
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struct igorplugusb *ir; |
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struct rc_dev *rc; |
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int ret = -ENOMEM; |
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udev = interface_to_usbdev(intf); |
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idesc = intf->cur_altsetting; |
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if (idesc->desc.bNumEndpoints != 1) { |
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dev_err(&intf->dev, "incorrect number of endpoints"); |
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return -ENODEV; |
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} |
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ep = &idesc->endpoint[0].desc; |
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if (!usb_endpoint_dir_in(ep) || !usb_endpoint_xfer_control(ep)) { |
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dev_err(&intf->dev, "endpoint incorrect"); |
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return -ENODEV; |
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} |
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ir = devm_kzalloc(&intf->dev, sizeof(*ir), GFP_KERNEL); |
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if (!ir) |
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return -ENOMEM; |
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ir->dev = &intf->dev; |
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timer_setup(&ir->timer, igorplugusb_timer, 0); |
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ir->request.bRequest = GET_INFRACODE; |
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ir->request.bRequestType = USB_TYPE_VENDOR | USB_DIR_IN; |
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ir->request.wLength = cpu_to_le16(sizeof(ir->buf_in)); |
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ir->urb = usb_alloc_urb(0, GFP_KERNEL); |
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if (!ir->urb) |
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goto fail; |
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usb_fill_control_urb(ir->urb, udev, |
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usb_rcvctrlpipe(udev, 0), (uint8_t *)&ir->request, |
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ir->buf_in, sizeof(ir->buf_in), igorplugusb_callback, ir); |
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usb_make_path(udev, ir->phys, sizeof(ir->phys)); |
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rc = rc_allocate_device(RC_DRIVER_IR_RAW); |
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if (!rc) |
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goto fail; |
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rc->device_name = DRIVER_DESC; |
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rc->input_phys = ir->phys; |
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usb_to_input_id(udev, &rc->input_id); |
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rc->dev.parent = &intf->dev; |
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/* |
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* This device can only store 36 pulses + spaces, which is not enough |
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* for the NEC protocol and many others. |
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*/ |
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rc->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER & |
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~(RC_PROTO_BIT_NEC | RC_PROTO_BIT_NECX | RC_PROTO_BIT_NEC32 | |
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RC_PROTO_BIT_RC6_6A_20 | RC_PROTO_BIT_RC6_6A_24 | |
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RC_PROTO_BIT_RC6_6A_32 | RC_PROTO_BIT_RC6_MCE | |
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RC_PROTO_BIT_SONY20 | RC_PROTO_BIT_SANYO); |
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rc->priv = ir; |
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rc->driver_name = DRIVER_NAME; |
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rc->map_name = RC_MAP_HAUPPAUGE; |
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rc->timeout = MS_TO_US(100); |
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rc->rx_resolution = 85; |
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ir->rc = rc; |
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ret = rc_register_device(rc); |
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if (ret) { |
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dev_err(&intf->dev, "failed to register rc device: %d", ret); |
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goto fail; |
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} |
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usb_set_intfdata(intf, ir); |
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igorplugusb_cmd(ir, SET_INFRABUFFER_EMPTY); |
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return 0; |
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fail: |
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rc_free_device(ir->rc); |
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usb_free_urb(ir->urb); |
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del_timer(&ir->timer); |
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return ret; |
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} |
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static void igorplugusb_disconnect(struct usb_interface *intf) |
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{ |
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struct igorplugusb *ir = usb_get_intfdata(intf); |
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rc_unregister_device(ir->rc); |
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del_timer_sync(&ir->timer); |
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usb_set_intfdata(intf, NULL); |
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usb_kill_urb(ir->urb); |
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usb_free_urb(ir->urb); |
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} |
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static const struct usb_device_id igorplugusb_table[] = { |
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/* Igor Plug USB (Atmel's Manufact. ID) */ |
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{ USB_DEVICE(0x03eb, 0x0002) }, |
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/* Fit PC2 Infrared Adapter */ |
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{ USB_DEVICE(0x03eb, 0x21fe) }, |
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/* Terminating entry */ |
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{ } |
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}; |
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static struct usb_driver igorplugusb_driver = { |
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.name = DRIVER_NAME, |
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.probe = igorplugusb_probe, |
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.disconnect = igorplugusb_disconnect, |
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.id_table = igorplugusb_table |
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}; |
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module_usb_driver(igorplugusb_driver); |
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MODULE_DESCRIPTION(DRIVER_DESC); |
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MODULE_AUTHOR("Sean Young <[email protected]>"); |
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MODULE_LICENSE("GPL"); |
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MODULE_DEVICE_TABLE(usb, igorplugusb_table);
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