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linux-next/drivers/media/rc/igorplugusb.c
Thomas Gleixner c942fddf87 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157
Based on 3 normalized pattern(s):

  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

  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 [author] [kishon] [vijay] [abraham]
  [i] [kishon]@[ti] [com] 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

  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 [author] [graeme] [gregory]
  [gg]@[slimlogic] [co] [uk] [author] [kishon] [vijay] [abraham] [i]
  [kishon]@[ti] [com] [based] [on] [twl6030]_[usb] [c] [author] [hema]
  [hk] [hemahk]@[ti] [com] 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

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1105 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.202006027@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:37 -07:00

261 lines
6.2 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* 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>
*/
#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)
{
struct 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(struct timer_list *t)
{
struct igorplugusb *ir = from_timer(ir, t, timer);
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 = -ENOMEM;
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;
timer_setup(&ir->timer, igorplugusb_timer, 0);
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)
goto fail;
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_DRIVER_IR_RAW);
if (!rc)
goto fail;
rc->device_name = DRIVER_DESC;
rc->input_phys = ir->phys;
usb_to_input_id(udev, &rc->input_id);
rc->dev.parent = &intf->dev;
/*
* This device can only store 36 pulses + spaces, which is not enough
* for the NEC protocol and many others.
*/
rc->allowed_protocols = RC_PROTO_BIT_ALL_IR_DECODER &
~(RC_PROTO_BIT_NEC | RC_PROTO_BIT_NECX | RC_PROTO_BIT_NEC32 |
RC_PROTO_BIT_RC6_6A_20 | RC_PROTO_BIT_RC6_6A_24 |
RC_PROTO_BIT_RC6_6A_32 | RC_PROTO_BIT_RC6_MCE |
RC_PROTO_BIT_SONY20 | RC_PROTO_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);
goto fail;
}
usb_set_intfdata(intf, ir);
igorplugusb_cmd(ir, SET_INFRABUFFER_EMPTY);
return 0;
fail:
rc_free_device(ir->rc);
usb_free_urb(ir->urb);
del_timer(&ir->timer);
return ret;
}
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 const 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);