diff options
Diffstat (limited to 'drivers/media/rc/igorplugusb.c')
| -rw-r--r-- | drivers/media/rc/igorplugusb.c | 269 |
1 files changed, 269 insertions, 0 deletions
diff --git a/drivers/media/rc/igorplugusb.c b/drivers/media/rc/igorplugusb.c new file mode 100644 index 000000000..1464ef9c5 --- /dev/null +++ b/drivers/media/rc/igorplugusb.c @@ -0,0 +1,269 @@ +// 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; + + u8 *buf_in; + + 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); + ir_raw_event_overflow(ir->rc); + } + + do { + rawir.duration = ir->buf_in[i] * 85; + 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: + 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 && ret != -EPERM) + 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(MAX_PACKET); + + ir->urb = usb_alloc_urb(0, GFP_KERNEL); + if (!ir->urb) + goto fail; + + ir->buf_in = kmalloc(MAX_PACKET, GFP_KERNEL); + if (!ir->buf_in) + goto fail; + usb_fill_control_urb(ir->urb, udev, + usb_rcvctrlpipe(udev, 0), (uint8_t *)&ir->request, + ir->buf_in, MAX_PACKET, 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_US(100); + rc->rx_resolution = 85; + + 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: + usb_poison_urb(ir->urb); + del_timer(&ir->timer); + usb_unpoison_urb(ir->urb); + usb_free_urb(ir->urb); + rc_free_device(ir->rc); + kfree(ir->buf_in); + + return ret; +} + +static void igorplugusb_disconnect(struct usb_interface *intf) +{ + struct igorplugusb *ir = usb_get_intfdata(intf); + + rc_unregister_device(ir->rc); + usb_poison_urb(ir->urb); + del_timer_sync(&ir->timer); + usb_set_intfdata(intf, NULL); + usb_unpoison_urb(ir->urb); + usb_free_urb(ir->urb); + kfree(ir->buf_in); +} + +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); |