283 lines
6.7 KiB
C
283 lines
6.7 KiB
C
/*
|
|
* Loopback driver for rc-core,
|
|
*
|
|
* Copyright (c) 2010 David Härdeman <david@hardeman.nu>
|
|
*
|
|
* This driver receives TX data and passes it back as RX data,
|
|
* which is useful for (scripted) debugging of rc-core without
|
|
* having to use actual hardware.
|
|
*
|
|
* 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/sched.h>
|
|
#include <linux/slab.h>
|
|
#include <media/rc-core.h>
|
|
|
|
#define DRIVER_NAME "rc-loopback"
|
|
#define dprintk(x...) if (debug) printk(KERN_INFO DRIVER_NAME ": " x)
|
|
#define RXMASK_REGULAR 0x1
|
|
#define RXMASK_LEARNING 0x2
|
|
|
|
static bool debug;
|
|
|
|
struct loopback_dev {
|
|
struct rc_dev *dev;
|
|
u32 txmask;
|
|
u32 txcarrier;
|
|
u32 txduty;
|
|
bool idle;
|
|
bool learning;
|
|
bool carrierreport;
|
|
u32 rxcarriermin;
|
|
u32 rxcarriermax;
|
|
};
|
|
|
|
static struct loopback_dev loopdev;
|
|
|
|
static int loop_set_tx_mask(struct rc_dev *dev, u32 mask)
|
|
{
|
|
struct loopback_dev *lodev = dev->priv;
|
|
|
|
if ((mask & (RXMASK_REGULAR | RXMASK_LEARNING)) != mask) {
|
|
dprintk("invalid tx mask: %u\n", mask);
|
|
return -EINVAL;
|
|
}
|
|
|
|
dprintk("setting tx mask: %u\n", mask);
|
|
lodev->txmask = mask;
|
|
return 0;
|
|
}
|
|
|
|
static int loop_set_tx_carrier(struct rc_dev *dev, u32 carrier)
|
|
{
|
|
struct loopback_dev *lodev = dev->priv;
|
|
|
|
dprintk("setting tx carrier: %u\n", carrier);
|
|
lodev->txcarrier = carrier;
|
|
return 0;
|
|
}
|
|
|
|
static int loop_set_tx_duty_cycle(struct rc_dev *dev, u32 duty_cycle)
|
|
{
|
|
struct loopback_dev *lodev = dev->priv;
|
|
|
|
if (duty_cycle < 1 || duty_cycle > 99) {
|
|
dprintk("invalid duty cycle: %u\n", duty_cycle);
|
|
return -EINVAL;
|
|
}
|
|
|
|
dprintk("setting duty cycle: %u\n", duty_cycle);
|
|
lodev->txduty = duty_cycle;
|
|
return 0;
|
|
}
|
|
|
|
static int loop_set_rx_carrier_range(struct rc_dev *dev, u32 min, u32 max)
|
|
{
|
|
struct loopback_dev *lodev = dev->priv;
|
|
|
|
if (min < 1 || min > max) {
|
|
dprintk("invalid rx carrier range %u to %u\n", min, max);
|
|
return -EINVAL;
|
|
}
|
|
|
|
dprintk("setting rx carrier range %u to %u\n", min, max);
|
|
lodev->rxcarriermin = min;
|
|
lodev->rxcarriermax = max;
|
|
return 0;
|
|
}
|
|
|
|
static int loop_tx_ir(struct rc_dev *dev, unsigned *txbuf, unsigned count)
|
|
{
|
|
struct loopback_dev *lodev = dev->priv;
|
|
u32 rxmask;
|
|
unsigned i;
|
|
DEFINE_IR_RAW_EVENT(rawir);
|
|
|
|
if (lodev->txcarrier < lodev->rxcarriermin ||
|
|
lodev->txcarrier > lodev->rxcarriermax) {
|
|
dprintk("ignoring tx, carrier out of range\n");
|
|
goto out;
|
|
}
|
|
|
|
if (lodev->learning)
|
|
rxmask = RXMASK_LEARNING;
|
|
else
|
|
rxmask = RXMASK_REGULAR;
|
|
|
|
if (!(rxmask & lodev->txmask)) {
|
|
dprintk("ignoring tx, rx mask mismatch\n");
|
|
goto out;
|
|
}
|
|
|
|
for (i = 0; i < count; i++) {
|
|
rawir.pulse = i % 2 ? false : true;
|
|
rawir.duration = txbuf[i] * 1000;
|
|
if (rawir.duration)
|
|
ir_raw_event_store_with_filter(dev, &rawir);
|
|
}
|
|
|
|
/* Fake a silence long enough to cause us to go idle */
|
|
rawir.pulse = false;
|
|
rawir.duration = dev->timeout;
|
|
ir_raw_event_store_with_filter(dev, &rawir);
|
|
|
|
ir_raw_event_handle(dev);
|
|
|
|
out:
|
|
return count;
|
|
}
|
|
|
|
static void loop_set_idle(struct rc_dev *dev, bool enable)
|
|
{
|
|
struct loopback_dev *lodev = dev->priv;
|
|
|
|
if (lodev->idle != enable) {
|
|
dprintk("%sing idle mode\n", enable ? "enter" : "exit");
|
|
lodev->idle = enable;
|
|
}
|
|
}
|
|
|
|
static int loop_set_learning_mode(struct rc_dev *dev, int enable)
|
|
{
|
|
struct loopback_dev *lodev = dev->priv;
|
|
|
|
if (lodev->learning != enable) {
|
|
dprintk("%sing learning mode\n", enable ? "enter" : "exit");
|
|
lodev->learning = !!enable;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int loop_set_carrier_report(struct rc_dev *dev, int enable)
|
|
{
|
|
struct loopback_dev *lodev = dev->priv;
|
|
|
|
if (lodev->carrierreport != enable) {
|
|
dprintk("%sabling carrier reports\n", enable ? "en" : "dis");
|
|
lodev->carrierreport = !!enable;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int loop_set_wakeup_filter(struct rc_dev *dev,
|
|
struct rc_scancode_filter *sc_filter)
|
|
{
|
|
static const unsigned int max = 512;
|
|
struct ir_raw_event *raw;
|
|
int ret;
|
|
int i;
|
|
|
|
/* fine to disable filter */
|
|
if (!sc_filter->mask)
|
|
return 0;
|
|
|
|
/* encode the specified filter and loop it back */
|
|
raw = kmalloc_array(max, sizeof(*raw), GFP_KERNEL);
|
|
ret = ir_raw_encode_scancode(dev->enabled_wakeup_protocols, sc_filter,
|
|
raw, max);
|
|
/* still loop back the partial raw IR even if it's incomplete */
|
|
if (ret == -ENOBUFS)
|
|
ret = max;
|
|
if (ret >= 0) {
|
|
/* do the loopback */
|
|
for (i = 0; i < ret; ++i)
|
|
ir_raw_event_store(dev, &raw[i]);
|
|
ir_raw_event_handle(dev);
|
|
|
|
ret = 0;
|
|
}
|
|
|
|
kfree(raw);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int __init loop_init(void)
|
|
{
|
|
struct rc_dev *rc;
|
|
int ret;
|
|
|
|
rc = rc_allocate_device();
|
|
if (!rc) {
|
|
printk(KERN_ERR DRIVER_NAME ": rc_dev allocation failed\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
rc->input_name = "rc-core loopback device";
|
|
rc->input_phys = "rc-core/virtual";
|
|
rc->input_id.bustype = BUS_VIRTUAL;
|
|
rc->input_id.version = 1;
|
|
rc->driver_name = DRIVER_NAME;
|
|
rc->map_name = RC_MAP_EMPTY;
|
|
rc->priv = &loopdev;
|
|
rc->driver_type = RC_DRIVER_IR_RAW;
|
|
rc->encode_wakeup = true;
|
|
rc->allowed_protocols = RC_BIT_ALL;
|
|
rc->timeout = 100 * 1000 * 1000; /* 100 ms */
|
|
rc->min_timeout = 1;
|
|
rc->max_timeout = UINT_MAX;
|
|
rc->rx_resolution = 1000;
|
|
rc->tx_resolution = 1000;
|
|
rc->s_tx_mask = loop_set_tx_mask;
|
|
rc->s_tx_carrier = loop_set_tx_carrier;
|
|
rc->s_tx_duty_cycle = loop_set_tx_duty_cycle;
|
|
rc->s_rx_carrier_range = loop_set_rx_carrier_range;
|
|
rc->tx_ir = loop_tx_ir;
|
|
rc->s_idle = loop_set_idle;
|
|
rc->s_learning_mode = loop_set_learning_mode;
|
|
rc->s_carrier_report = loop_set_carrier_report;
|
|
rc->s_wakeup_filter = loop_set_wakeup_filter;
|
|
|
|
loopdev.txmask = RXMASK_REGULAR;
|
|
loopdev.txcarrier = 36000;
|
|
loopdev.txduty = 50;
|
|
loopdev.rxcarriermin = 1;
|
|
loopdev.rxcarriermax = ~0;
|
|
loopdev.idle = true;
|
|
loopdev.learning = false;
|
|
loopdev.carrierreport = false;
|
|
|
|
ret = rc_register_device(rc);
|
|
if (ret < 0) {
|
|
printk(KERN_ERR DRIVER_NAME ": rc_dev registration failed\n");
|
|
rc_free_device(rc);
|
|
return ret;
|
|
}
|
|
|
|
loopdev.dev = rc;
|
|
return 0;
|
|
}
|
|
|
|
static void __exit loop_exit(void)
|
|
{
|
|
rc_unregister_device(loopdev.dev);
|
|
}
|
|
|
|
module_init(loop_init);
|
|
module_exit(loop_exit);
|
|
|
|
module_param(debug, bool, S_IRUGO | S_IWUSR);
|
|
MODULE_PARM_DESC(debug, "Enable debug messages");
|
|
|
|
MODULE_DESCRIPTION("Loopback device for rc-core debugging");
|
|
MODULE_AUTHOR("David Härdeman <david@hardeman.nu>");
|
|
MODULE_LICENSE("GPL");
|