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528222d853
rc-core kapi uses nanoseconds for infrared durations for receiving, and microseconds for sending. The uapi already uses microseconds for both, so this patch does not change the uapi. Infrared durations do not need nanosecond resolution. IR protocols do not have durations shorter than about 100 microseconds. Some IR hardware offers 250 microseconds resolution, which is sufficient for most protocols. Better hardware has 50 microsecond resolution and is enough for every protocol I am aware off. Unify on microseconds everywhere. This simplifies the code since less conversion between microseconds and nanoseconds needs to be done. This affects: - rx_resolution member of struct rc_dev - timeout member of struct rc_dev - duration member in struct ir_raw_event Cc: "Bruno Prémont" <bonbons@linux-vserver.org> Cc: Hans Verkuil <hverkuil-cisco@xs4all.nl> Cc: Maxim Levitsky <maximlevitsky@gmail.com> Cc: Patrick Lerda <patrick9876@free.fr> Cc: Kevin Hilman <khilman@baylibre.com> Cc: Neil Armstrong <narmstrong@baylibre.com> Cc: Jerome Brunet <jbrunet@baylibre.com> Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Cc: Sean Wang <sean.wang@mediatek.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Patrice Chotard <patrice.chotard@st.com> Cc: Maxime Ripard <mripard@kernel.org> Cc: Chen-Yu Tsai <wens@csie.org> Cc: "David Härdeman" <david@hardeman.nu> Cc: Benjamin Valentin <benpicco@googlemail.com> Cc: Antti Palosaari <crope@iki.fi> Signed-off-by: Sean Young <sean@mess.org> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
261 lines
6.2 KiB
C
261 lines
6.2 KiB
C
// 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 <sean@mess.org>
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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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* <hochstein@algo.informatik.tu-darmstadt.de>
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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 <sean@mess.org>");
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MODULE_LICENSE("GPL");
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MODULE_DEVICE_TABLE(usb, igorplugusb_table);
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