mirror of https://gitee.com/openkylin/linux.git
525 lines
14 KiB
C
525 lines
14 KiB
C
/*
|
|
* Streamzap Remote Control driver
|
|
*
|
|
* Copyright (c) 2005 Christoph Bartelmus <lirc@bartelmus.de>
|
|
* Copyright (c) 2010 Jarod Wilson <jarod@wilsonet.com>
|
|
*
|
|
* This driver was based on the work of Greg Wickham and Adrian
|
|
* Dewhurst. It was substantially rewritten to support correct signal
|
|
* gaps and now maintains a delay buffer, which is used to present
|
|
* consistent timing behaviour to user space applications. Without the
|
|
* delay buffer an ugly hack would be required in lircd, which can
|
|
* cause sluggish signal decoding in certain situations.
|
|
*
|
|
* Ported to in-kernel ir-core interface by Jarod Wilson
|
|
*
|
|
* This driver is based on the USB skeleton driver packaged with the
|
|
* kernel; copyright (C) 2001-2003 Greg Kroah-Hartman (greg@kroah.com)
|
|
*
|
|
* 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.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/usb.h>
|
|
#include <linux/usb/input.h>
|
|
#include <media/rc-core.h>
|
|
|
|
#define DRIVER_VERSION "1.61"
|
|
#define DRIVER_NAME "streamzap"
|
|
#define DRIVER_DESC "Streamzap Remote Control driver"
|
|
|
|
#define USB_STREAMZAP_VENDOR_ID 0x0e9c
|
|
#define USB_STREAMZAP_PRODUCT_ID 0x0000
|
|
|
|
/* table of devices that work with this driver */
|
|
static struct usb_device_id streamzap_table[] = {
|
|
/* Streamzap Remote Control */
|
|
{ USB_DEVICE(USB_STREAMZAP_VENDOR_ID, USB_STREAMZAP_PRODUCT_ID) },
|
|
/* Terminating entry */
|
|
{ }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(usb, streamzap_table);
|
|
|
|
#define SZ_PULSE_MASK 0xf0
|
|
#define SZ_SPACE_MASK 0x0f
|
|
#define SZ_TIMEOUT 0xff
|
|
#define SZ_RESOLUTION 256
|
|
|
|
/* number of samples buffered */
|
|
#define SZ_BUF_LEN 128
|
|
|
|
/* from ir-rc5-sz-decoder.c */
|
|
#ifdef CONFIG_IR_RC5_SZ_DECODER_MODULE
|
|
#define load_rc5_sz_decode() request_module("ir-rc5-sz-decoder")
|
|
#else
|
|
#define load_rc5_sz_decode() {}
|
|
#endif
|
|
|
|
enum StreamzapDecoderState {
|
|
PulseSpace,
|
|
FullPulse,
|
|
FullSpace,
|
|
IgnorePulse
|
|
};
|
|
|
|
/* structure to hold our device specific stuff */
|
|
struct streamzap_ir {
|
|
/* ir-core */
|
|
struct rc_dev *rdev;
|
|
|
|
/* core device info */
|
|
struct device *dev;
|
|
|
|
/* usb */
|
|
struct usb_device *usbdev;
|
|
struct usb_interface *interface;
|
|
struct usb_endpoint_descriptor *endpoint;
|
|
struct urb *urb_in;
|
|
|
|
/* buffer & dma */
|
|
unsigned char *buf_in;
|
|
dma_addr_t dma_in;
|
|
unsigned int buf_in_len;
|
|
|
|
/* track what state we're in */
|
|
enum StreamzapDecoderState decoder_state;
|
|
/* tracks whether we are currently receiving some signal */
|
|
bool idle;
|
|
/* sum of signal lengths received since signal start */
|
|
unsigned long sum;
|
|
/* start time of signal; necessary for gap tracking */
|
|
struct timeval signal_last;
|
|
struct timeval signal_start;
|
|
bool timeout_enabled;
|
|
|
|
char name[128];
|
|
char phys[64];
|
|
};
|
|
|
|
|
|
/* local function prototypes */
|
|
static int streamzap_probe(struct usb_interface *interface,
|
|
const struct usb_device_id *id);
|
|
static void streamzap_disconnect(struct usb_interface *interface);
|
|
static void streamzap_callback(struct urb *urb);
|
|
static int streamzap_suspend(struct usb_interface *intf, pm_message_t message);
|
|
static int streamzap_resume(struct usb_interface *intf);
|
|
|
|
/* usb specific object needed to register this driver with the usb subsystem */
|
|
static struct usb_driver streamzap_driver = {
|
|
.name = DRIVER_NAME,
|
|
.probe = streamzap_probe,
|
|
.disconnect = streamzap_disconnect,
|
|
.suspend = streamzap_suspend,
|
|
.resume = streamzap_resume,
|
|
.id_table = streamzap_table,
|
|
};
|
|
|
|
static void sz_push(struct streamzap_ir *sz, struct ir_raw_event rawir)
|
|
{
|
|
dev_dbg(sz->dev, "Storing %s with duration %u us\n",
|
|
(rawir.pulse ? "pulse" : "space"), rawir.duration);
|
|
ir_raw_event_store_with_filter(sz->rdev, &rawir);
|
|
}
|
|
|
|
static void sz_push_full_pulse(struct streamzap_ir *sz,
|
|
unsigned char value)
|
|
{
|
|
DEFINE_IR_RAW_EVENT(rawir);
|
|
|
|
if (sz->idle) {
|
|
long deltv;
|
|
|
|
sz->signal_last = sz->signal_start;
|
|
do_gettimeofday(&sz->signal_start);
|
|
|
|
deltv = sz->signal_start.tv_sec - sz->signal_last.tv_sec;
|
|
rawir.pulse = false;
|
|
if (deltv > 15) {
|
|
/* really long time */
|
|
rawir.duration = IR_MAX_DURATION;
|
|
} else {
|
|
rawir.duration = (int)(deltv * 1000000 +
|
|
sz->signal_start.tv_usec -
|
|
sz->signal_last.tv_usec);
|
|
rawir.duration -= sz->sum;
|
|
rawir.duration = US_TO_NS(rawir.duration);
|
|
rawir.duration &= IR_MAX_DURATION;
|
|
}
|
|
sz_push(sz, rawir);
|
|
|
|
sz->idle = false;
|
|
sz->sum = 0;
|
|
}
|
|
|
|
rawir.pulse = true;
|
|
rawir.duration = ((int) value) * SZ_RESOLUTION;
|
|
rawir.duration += SZ_RESOLUTION / 2;
|
|
sz->sum += rawir.duration;
|
|
rawir.duration = US_TO_NS(rawir.duration);
|
|
rawir.duration &= IR_MAX_DURATION;
|
|
sz_push(sz, rawir);
|
|
}
|
|
|
|
static void sz_push_half_pulse(struct streamzap_ir *sz,
|
|
unsigned char value)
|
|
{
|
|
sz_push_full_pulse(sz, (value & SZ_PULSE_MASK) >> 4);
|
|
}
|
|
|
|
static void sz_push_full_space(struct streamzap_ir *sz,
|
|
unsigned char value)
|
|
{
|
|
DEFINE_IR_RAW_EVENT(rawir);
|
|
|
|
rawir.pulse = false;
|
|
rawir.duration = ((int) value) * SZ_RESOLUTION;
|
|
rawir.duration += SZ_RESOLUTION / 2;
|
|
sz->sum += rawir.duration;
|
|
rawir.duration = US_TO_NS(rawir.duration);
|
|
sz_push(sz, rawir);
|
|
}
|
|
|
|
static void sz_push_half_space(struct streamzap_ir *sz,
|
|
unsigned long value)
|
|
{
|
|
sz_push_full_space(sz, value & SZ_SPACE_MASK);
|
|
}
|
|
|
|
/**
|
|
* streamzap_callback - usb IRQ handler callback
|
|
*
|
|
* This procedure is invoked on reception of data from
|
|
* the usb remote.
|
|
*/
|
|
static void streamzap_callback(struct urb *urb)
|
|
{
|
|
struct streamzap_ir *sz;
|
|
unsigned int i;
|
|
int len;
|
|
|
|
if (!urb)
|
|
return;
|
|
|
|
sz = urb->context;
|
|
len = urb->actual_length;
|
|
|
|
switch (urb->status) {
|
|
case -ECONNRESET:
|
|
case -ENOENT:
|
|
case -ESHUTDOWN:
|
|
/*
|
|
* this urb is terminated, clean up.
|
|
* sz might already be invalid at this point
|
|
*/
|
|
dev_err(sz->dev, "urb terminated, status: %d\n", urb->status);
|
|
return;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
dev_dbg(sz->dev, "%s: received urb, len %d\n", __func__, len);
|
|
for (i = 0; i < len; i++) {
|
|
dev_dbg(sz->dev, "sz->buf_in[%d]: %x\n",
|
|
i, (unsigned char)sz->buf_in[i]);
|
|
switch (sz->decoder_state) {
|
|
case PulseSpace:
|
|
if ((sz->buf_in[i] & SZ_PULSE_MASK) ==
|
|
SZ_PULSE_MASK) {
|
|
sz->decoder_state = FullPulse;
|
|
continue;
|
|
} else if ((sz->buf_in[i] & SZ_SPACE_MASK)
|
|
== SZ_SPACE_MASK) {
|
|
sz_push_half_pulse(sz, sz->buf_in[i]);
|
|
sz->decoder_state = FullSpace;
|
|
continue;
|
|
} else {
|
|
sz_push_half_pulse(sz, sz->buf_in[i]);
|
|
sz_push_half_space(sz, sz->buf_in[i]);
|
|
}
|
|
break;
|
|
case FullPulse:
|
|
sz_push_full_pulse(sz, sz->buf_in[i]);
|
|
sz->decoder_state = IgnorePulse;
|
|
break;
|
|
case FullSpace:
|
|
if (sz->buf_in[i] == SZ_TIMEOUT) {
|
|
DEFINE_IR_RAW_EVENT(rawir);
|
|
|
|
rawir.pulse = false;
|
|
rawir.duration = sz->rdev->timeout;
|
|
sz->idle = true;
|
|
if (sz->timeout_enabled)
|
|
sz_push(sz, rawir);
|
|
ir_raw_event_handle(sz->rdev);
|
|
ir_raw_event_reset(sz->rdev);
|
|
} else {
|
|
sz_push_full_space(sz, sz->buf_in[i]);
|
|
}
|
|
sz->decoder_state = PulseSpace;
|
|
break;
|
|
case IgnorePulse:
|
|
if ((sz->buf_in[i] & SZ_SPACE_MASK) ==
|
|
SZ_SPACE_MASK) {
|
|
sz->decoder_state = FullSpace;
|
|
continue;
|
|
}
|
|
sz_push_half_space(sz, sz->buf_in[i]);
|
|
sz->decoder_state = PulseSpace;
|
|
break;
|
|
}
|
|
}
|
|
|
|
ir_raw_event_handle(sz->rdev);
|
|
usb_submit_urb(urb, GFP_ATOMIC);
|
|
|
|
return;
|
|
}
|
|
|
|
static struct rc_dev *streamzap_init_rc_dev(struct streamzap_ir *sz)
|
|
{
|
|
struct rc_dev *rdev;
|
|
struct device *dev = sz->dev;
|
|
int ret;
|
|
|
|
rdev = rc_allocate_device();
|
|
if (!rdev) {
|
|
dev_err(dev, "remote dev allocation failed\n");
|
|
goto out;
|
|
}
|
|
|
|
snprintf(sz->name, sizeof(sz->name), "Streamzap PC Remote Infrared "
|
|
"Receiver (%04x:%04x)",
|
|
le16_to_cpu(sz->usbdev->descriptor.idVendor),
|
|
le16_to_cpu(sz->usbdev->descriptor.idProduct));
|
|
usb_make_path(sz->usbdev, sz->phys, sizeof(sz->phys));
|
|
strlcat(sz->phys, "/input0", sizeof(sz->phys));
|
|
|
|
rdev->input_name = sz->name;
|
|
rdev->input_phys = sz->phys;
|
|
usb_to_input_id(sz->usbdev, &rdev->input_id);
|
|
rdev->dev.parent = dev;
|
|
rdev->priv = sz;
|
|
rdev->driver_type = RC_DRIVER_IR_RAW;
|
|
rc_set_allowed_protocols(rdev, RC_BIT_ALL);
|
|
rdev->driver_name = DRIVER_NAME;
|
|
rdev->map_name = RC_MAP_STREAMZAP;
|
|
|
|
ret = rc_register_device(rdev);
|
|
if (ret < 0) {
|
|
dev_err(dev, "remote input device register failed\n");
|
|
goto out;
|
|
}
|
|
|
|
return rdev;
|
|
|
|
out:
|
|
rc_free_device(rdev);
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* streamzap_probe
|
|
*
|
|
* Called by usb-core to associated with a candidate device
|
|
* On any failure the return value is the ERROR
|
|
* On success return 0
|
|
*/
|
|
static int streamzap_probe(struct usb_interface *intf,
|
|
const struct usb_device_id *id)
|
|
{
|
|
struct usb_device *usbdev = interface_to_usbdev(intf);
|
|
struct usb_host_interface *iface_host;
|
|
struct streamzap_ir *sz = NULL;
|
|
char buf[63], name[128] = "";
|
|
int retval = -ENOMEM;
|
|
int pipe, maxp;
|
|
|
|
/* Allocate space for device driver specific data */
|
|
sz = kzalloc(sizeof(struct streamzap_ir), GFP_KERNEL);
|
|
if (!sz)
|
|
return -ENOMEM;
|
|
|
|
sz->usbdev = usbdev;
|
|
sz->interface = intf;
|
|
|
|
/* Check to ensure endpoint information matches requirements */
|
|
iface_host = intf->cur_altsetting;
|
|
|
|
if (iface_host->desc.bNumEndpoints != 1) {
|
|
dev_err(&intf->dev, "%s: Unexpected desc.bNumEndpoints (%d)\n",
|
|
__func__, iface_host->desc.bNumEndpoints);
|
|
retval = -ENODEV;
|
|
goto free_sz;
|
|
}
|
|
|
|
sz->endpoint = &(iface_host->endpoint[0].desc);
|
|
if ((sz->endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
|
|
!= USB_DIR_IN) {
|
|
dev_err(&intf->dev, "%s: endpoint doesn't match input device "
|
|
"02%02x\n", __func__, sz->endpoint->bEndpointAddress);
|
|
retval = -ENODEV;
|
|
goto free_sz;
|
|
}
|
|
|
|
if ((sz->endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
|
|
!= USB_ENDPOINT_XFER_INT) {
|
|
dev_err(&intf->dev, "%s: endpoint attributes don't match xfer "
|
|
"02%02x\n", __func__, sz->endpoint->bmAttributes);
|
|
retval = -ENODEV;
|
|
goto free_sz;
|
|
}
|
|
|
|
pipe = usb_rcvintpipe(usbdev, sz->endpoint->bEndpointAddress);
|
|
maxp = usb_maxpacket(usbdev, pipe, usb_pipeout(pipe));
|
|
|
|
if (maxp == 0) {
|
|
dev_err(&intf->dev, "%s: endpoint Max Packet Size is 0!?!\n",
|
|
__func__);
|
|
retval = -ENODEV;
|
|
goto free_sz;
|
|
}
|
|
|
|
/* Allocate the USB buffer and IRQ URB */
|
|
sz->buf_in = usb_alloc_coherent(usbdev, maxp, GFP_ATOMIC, &sz->dma_in);
|
|
if (!sz->buf_in)
|
|
goto free_sz;
|
|
|
|
sz->urb_in = usb_alloc_urb(0, GFP_KERNEL);
|
|
if (!sz->urb_in)
|
|
goto free_buf_in;
|
|
|
|
sz->dev = &intf->dev;
|
|
sz->buf_in_len = maxp;
|
|
|
|
if (usbdev->descriptor.iManufacturer
|
|
&& usb_string(usbdev, usbdev->descriptor.iManufacturer,
|
|
buf, sizeof(buf)) > 0)
|
|
strlcpy(name, buf, sizeof(name));
|
|
|
|
if (usbdev->descriptor.iProduct
|
|
&& usb_string(usbdev, usbdev->descriptor.iProduct,
|
|
buf, sizeof(buf)) > 0)
|
|
snprintf(name + strlen(name), sizeof(name) - strlen(name),
|
|
" %s", buf);
|
|
|
|
sz->rdev = streamzap_init_rc_dev(sz);
|
|
if (!sz->rdev)
|
|
goto rc_dev_fail;
|
|
|
|
sz->idle = true;
|
|
sz->decoder_state = PulseSpace;
|
|
/* FIXME: don't yet have a way to set this */
|
|
sz->timeout_enabled = true;
|
|
sz->rdev->timeout = ((US_TO_NS(SZ_TIMEOUT * SZ_RESOLUTION) &
|
|
IR_MAX_DURATION) | 0x03000000);
|
|
#if 0
|
|
/* not yet supported, depends on patches from maxim */
|
|
/* see also: LIRC_GET_REC_RESOLUTION and LIRC_SET_REC_TIMEOUT */
|
|
sz->min_timeout = US_TO_NS(SZ_TIMEOUT * SZ_RESOLUTION);
|
|
sz->max_timeout = US_TO_NS(SZ_TIMEOUT * SZ_RESOLUTION);
|
|
#endif
|
|
|
|
do_gettimeofday(&sz->signal_start);
|
|
|
|
/* Complete final initialisations */
|
|
usb_fill_int_urb(sz->urb_in, usbdev, pipe, sz->buf_in,
|
|
maxp, (usb_complete_t)streamzap_callback,
|
|
sz, sz->endpoint->bInterval);
|
|
sz->urb_in->transfer_dma = sz->dma_in;
|
|
sz->urb_in->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
|
|
|
|
usb_set_intfdata(intf, sz);
|
|
|
|
if (usb_submit_urb(sz->urb_in, GFP_ATOMIC))
|
|
dev_err(sz->dev, "urb submit failed\n");
|
|
|
|
dev_info(sz->dev, "Registered %s on usb%d:%d\n", name,
|
|
usbdev->bus->busnum, usbdev->devnum);
|
|
|
|
/* Load the streamzap not-quite-rc5 decoder too */
|
|
load_rc5_sz_decode();
|
|
|
|
return 0;
|
|
|
|
rc_dev_fail:
|
|
usb_free_urb(sz->urb_in);
|
|
free_buf_in:
|
|
usb_free_coherent(usbdev, maxp, sz->buf_in, sz->dma_in);
|
|
free_sz:
|
|
kfree(sz);
|
|
|
|
return retval;
|
|
}
|
|
|
|
/**
|
|
* streamzap_disconnect
|
|
*
|
|
* Called by the usb core when the device is removed from the system.
|
|
*
|
|
* This routine guarantees that the driver will not submit any more urbs
|
|
* by clearing dev->usbdev. It is also supposed to terminate any currently
|
|
* active urbs. Unfortunately, usb_bulk_msg(), used in streamzap_read(),
|
|
* does not provide any way to do this.
|
|
*/
|
|
static void streamzap_disconnect(struct usb_interface *interface)
|
|
{
|
|
struct streamzap_ir *sz = usb_get_intfdata(interface);
|
|
struct usb_device *usbdev = interface_to_usbdev(interface);
|
|
|
|
usb_set_intfdata(interface, NULL);
|
|
|
|
if (!sz)
|
|
return;
|
|
|
|
sz->usbdev = NULL;
|
|
rc_unregister_device(sz->rdev);
|
|
usb_kill_urb(sz->urb_in);
|
|
usb_free_urb(sz->urb_in);
|
|
usb_free_coherent(usbdev, sz->buf_in_len, sz->buf_in, sz->dma_in);
|
|
|
|
kfree(sz);
|
|
}
|
|
|
|
static int streamzap_suspend(struct usb_interface *intf, pm_message_t message)
|
|
{
|
|
struct streamzap_ir *sz = usb_get_intfdata(intf);
|
|
|
|
usb_kill_urb(sz->urb_in);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int streamzap_resume(struct usb_interface *intf)
|
|
{
|
|
struct streamzap_ir *sz = usb_get_intfdata(intf);
|
|
|
|
if (usb_submit_urb(sz->urb_in, GFP_ATOMIC)) {
|
|
dev_err(sz->dev, "Error sumbiting urb\n");
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
module_usb_driver(streamzap_driver);
|
|
|
|
MODULE_AUTHOR("Jarod Wilson <jarod@wilsonet.com>");
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
MODULE_LICENSE("GPL");
|