Commit a92def1b authored by Sean Young's avatar Sean Young Committed by Mauro Carvalho Chehab

[media] ir-rx51: port to rc-core

This driver was written using lirc since rc-core did not support
transmitter-only hardware at that time. Now that it does, port
this driver.

Compile tested only.
Signed-off-by: default avatarSean Young <sean@mess.org>
Cc: Timo Kokkonen <timo.t.kokkonen@iki.fi>
Cc: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
parent fe052da4
...@@ -484,15 +484,15 @@ static struct pwm_omap_dmtimer_pdata pwm_dmtimer_pdata = { ...@@ -484,15 +484,15 @@ static struct pwm_omap_dmtimer_pdata pwm_dmtimer_pdata = {
}; };
#endif #endif
static struct lirc_rx51_platform_data __maybe_unused rx51_lirc_data = { static struct ir_rx51_platform_data __maybe_unused rx51_ir_data = {
.set_max_mpu_wakeup_lat = omap_pm_set_max_mpu_wakeup_lat, .set_max_mpu_wakeup_lat = omap_pm_set_max_mpu_wakeup_lat,
}; };
static struct platform_device __maybe_unused rx51_lirc_device = { static struct platform_device __maybe_unused rx51_ir_device = {
.name = "lirc_rx51", .name = "ir_rx51",
.id = -1, .id = -1,
.dev = { .dev = {
.platform_data = &rx51_lirc_data, .platform_data = &rx51_ir_data,
}, },
}; };
......
...@@ -345,7 +345,7 @@ config IR_TTUSBIR ...@@ -345,7 +345,7 @@ config IR_TTUSBIR
config IR_RX51 config IR_RX51
tristate "Nokia N900 IR transmitter diode" tristate "Nokia N900 IR transmitter diode"
depends on OMAP_DM_TIMER && PWM_OMAP_DMTIMER && ARCH_OMAP2PLUS && LIRC depends on (OMAP_DM_TIMER && PWM_OMAP_DMTIMER && ARCH_OMAP2PLUS || COMPILE_TEST) && RC_CORE
---help--- ---help---
Say Y or M here if you want to enable support for the IR Say Y or M here if you want to enable support for the IR
transmitter diode built in the Nokia N900 (RX51) device. transmitter diode built in the Nokia N900 (RX51) device.
......
...@@ -15,32 +15,23 @@ ...@@ -15,32 +15,23 @@
*/ */
#include <linux/clk.h> #include <linux/clk.h>
#include <linux/module.h> #include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/uaccess.h>
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <linux/sched.h>
#include <linux/wait.h> #include <linux/wait.h>
#include <linux/pwm.h> #include <linux/pwm.h>
#include <linux/of.h> #include <linux/of.h>
#include <linux/hrtimer.h> #include <linux/hrtimer.h>
#include <media/lirc.h> #include <media/rc-core.h>
#include <media/lirc_dev.h>
#include <linux/platform_data/media/ir-rx51.h> #include <linux/platform_data/media/ir-rx51.h>
#define LIRC_RX51_DRIVER_FEATURES (LIRC_CAN_SET_SEND_DUTY_CYCLE | \
LIRC_CAN_SET_SEND_CARRIER | \
LIRC_CAN_SEND_PULSE)
#define DRIVER_NAME "lirc_rx51"
#define WBUF_LEN 256 #define WBUF_LEN 256
struct lirc_rx51 { struct ir_rx51 {
struct rc_dev *rcdev;
struct pwm_device *pwm; struct pwm_device *pwm;
struct hrtimer timer; struct hrtimer timer;
struct device *dev; struct device *dev;
struct lirc_rx51_platform_data *pdata; struct ir_rx51_platform_data *pdata;
wait_queue_head_t wqueue; wait_queue_head_t wqueue;
unsigned int freq; /* carrier frequency */ unsigned int freq; /* carrier frequency */
...@@ -50,38 +41,37 @@ struct lirc_rx51 { ...@@ -50,38 +41,37 @@ struct lirc_rx51 {
unsigned long device_is_open; unsigned long device_is_open;
}; };
static inline void lirc_rx51_on(struct lirc_rx51 *lirc_rx51) static inline void ir_rx51_on(struct ir_rx51 *ir_rx51)
{ {
pwm_enable(lirc_rx51->pwm); pwm_enable(ir_rx51->pwm);
} }
static inline void lirc_rx51_off(struct lirc_rx51 *lirc_rx51) static inline void ir_rx51_off(struct ir_rx51 *ir_rx51)
{ {
pwm_disable(lirc_rx51->pwm); pwm_disable(ir_rx51->pwm);
} }
static int init_timing_params(struct lirc_rx51 *lirc_rx51) static int init_timing_params(struct ir_rx51 *ir_rx51)
{ {
struct pwm_device *pwm = lirc_rx51->pwm; struct pwm_device *pwm = ir_rx51->pwm;
int duty, period = DIV_ROUND_CLOSEST(NSEC_PER_SEC, lirc_rx51->freq); int duty, period = DIV_ROUND_CLOSEST(NSEC_PER_SEC, ir_rx51->freq);
duty = DIV_ROUND_CLOSEST(lirc_rx51->duty_cycle * period, 100); duty = DIV_ROUND_CLOSEST(ir_rx51->duty_cycle * period, 100);
pwm_config(pwm, duty, period); pwm_config(pwm, duty, period);
return 0; return 0;
} }
static enum hrtimer_restart lirc_rx51_timer_cb(struct hrtimer *timer) static enum hrtimer_restart ir_rx51_timer_cb(struct hrtimer *timer)
{ {
struct lirc_rx51 *lirc_rx51 = struct ir_rx51 *ir_rx51 = container_of(timer, struct ir_rx51, timer);
container_of(timer, struct lirc_rx51, timer);
ktime_t now; ktime_t now;
if (lirc_rx51->wbuf_index < 0) { if (ir_rx51->wbuf_index < 0) {
dev_err_ratelimited(lirc_rx51->dev, dev_err_ratelimited(ir_rx51->dev,
"BUG wbuf_index has value of %i\n", "BUG wbuf_index has value of %i\n",
lirc_rx51->wbuf_index); ir_rx51->wbuf_index);
goto end; goto end;
} }
...@@ -92,20 +82,20 @@ static enum hrtimer_restart lirc_rx51_timer_cb(struct hrtimer *timer) ...@@ -92,20 +82,20 @@ static enum hrtimer_restart lirc_rx51_timer_cb(struct hrtimer *timer)
do { do {
u64 ns; u64 ns;
if (lirc_rx51->wbuf_index >= WBUF_LEN) if (ir_rx51->wbuf_index >= WBUF_LEN)
goto end; goto end;
if (lirc_rx51->wbuf[lirc_rx51->wbuf_index] == -1) if (ir_rx51->wbuf[ir_rx51->wbuf_index] == -1)
goto end; goto end;
if (lirc_rx51->wbuf_index % 2) if (ir_rx51->wbuf_index % 2)
lirc_rx51_off(lirc_rx51); ir_rx51_off(ir_rx51);
else else
lirc_rx51_on(lirc_rx51); ir_rx51_on(ir_rx51);
ns = 1000 * lirc_rx51->wbuf[lirc_rx51->wbuf_index]; ns = US_TO_NS(ir_rx51->wbuf[ir_rx51->wbuf_index]);
hrtimer_add_expires_ns(timer, ns); hrtimer_add_expires_ns(timer, ns);
lirc_rx51->wbuf_index++; ir_rx51->wbuf_index++;
now = timer->base->get_time(); now = timer->base->get_time();
...@@ -114,203 +104,112 @@ static enum hrtimer_restart lirc_rx51_timer_cb(struct hrtimer *timer) ...@@ -114,203 +104,112 @@ static enum hrtimer_restart lirc_rx51_timer_cb(struct hrtimer *timer)
return HRTIMER_RESTART; return HRTIMER_RESTART;
end: end:
/* Stop TX here */ /* Stop TX here */
lirc_rx51_off(lirc_rx51); ir_rx51_off(ir_rx51);
lirc_rx51->wbuf_index = -1; ir_rx51->wbuf_index = -1;
wake_up_interruptible(&lirc_rx51->wqueue); wake_up_interruptible(&ir_rx51->wqueue);
return HRTIMER_NORESTART; return HRTIMER_NORESTART;
} }
static ssize_t lirc_rx51_write(struct file *file, const char *buf, static int ir_rx51_tx(struct rc_dev *dev, unsigned int *buffer,
size_t n, loff_t *ppos) unsigned int count)
{ {
int count, i; struct ir_rx51 *ir_rx51 = dev->priv;
struct lirc_rx51 *lirc_rx51 = file->private_data;
if (n % sizeof(int)) if (count > WBUF_LEN)
return -EINVAL; return -EINVAL;
count = n / sizeof(int); memcpy(ir_rx51->wbuf, buffer, count * sizeof(unsigned int));
if ((count > WBUF_LEN) || (count % 2 == 0))
return -EINVAL;
/* Wait any pending transfers to finish */ /* Wait any pending transfers to finish */
wait_event_interruptible(lirc_rx51->wqueue, lirc_rx51->wbuf_index < 0); wait_event_interruptible(ir_rx51->wqueue, ir_rx51->wbuf_index < 0);
if (copy_from_user(lirc_rx51->wbuf, buf, n))
return -EFAULT;
/* Sanity check the input pulses */
for (i = 0; i < count; i++)
if (lirc_rx51->wbuf[i] < 0)
return -EINVAL;
init_timing_params(lirc_rx51); init_timing_params(ir_rx51);
if (count < WBUF_LEN) if (count < WBUF_LEN)
lirc_rx51->wbuf[count] = -1; /* Insert termination mark */ ir_rx51->wbuf[count] = -1; /* Insert termination mark */
/* /*
* Adjust latency requirements so the device doesn't go in too * Adjust latency requirements so the device doesn't go in too
* deep sleep states * deep sleep states
*/ */
lirc_rx51->pdata->set_max_mpu_wakeup_lat(lirc_rx51->dev, 50); ir_rx51->pdata->set_max_mpu_wakeup_lat(ir_rx51->dev, 50);
lirc_rx51_on(lirc_rx51); ir_rx51_on(ir_rx51);
lirc_rx51->wbuf_index = 1; ir_rx51->wbuf_index = 1;
hrtimer_start(&lirc_rx51->timer, hrtimer_start(&ir_rx51->timer,
ns_to_ktime(1000 * lirc_rx51->wbuf[0]), ns_to_ktime(US_TO_NS(ir_rx51->wbuf[0])),
HRTIMER_MODE_REL); HRTIMER_MODE_REL);
/* /*
* Don't return back to the userspace until the transfer has * Don't return back to the userspace until the transfer has
* finished * finished
*/ */
wait_event_interruptible(lirc_rx51->wqueue, lirc_rx51->wbuf_index < 0); wait_event_interruptible(ir_rx51->wqueue, ir_rx51->wbuf_index < 0);
/* We can sleep again */ /* We can sleep again */
lirc_rx51->pdata->set_max_mpu_wakeup_lat(lirc_rx51->dev, -1); ir_rx51->pdata->set_max_mpu_wakeup_lat(ir_rx51->dev, -1);
return n; return count;
} }
static long lirc_rx51_ioctl(struct file *filep, static int ir_rx51_open(struct rc_dev *dev)
unsigned int cmd, unsigned long arg)
{ {
int result; struct ir_rx51 *ir_rx51 = dev->priv;
unsigned long value;
unsigned int ivalue;
struct lirc_rx51 *lirc_rx51 = filep->private_data;
switch (cmd) {
case LIRC_GET_SEND_MODE:
result = put_user(LIRC_MODE_PULSE, (unsigned long *)arg);
if (result)
return result;
break;
case LIRC_SET_SEND_MODE:
result = get_user(value, (unsigned long *)arg);
if (result)
return result;
/* only LIRC_MODE_PULSE supported */
if (value != LIRC_MODE_PULSE)
return -ENOSYS;
break;
case LIRC_GET_REC_MODE:
result = put_user(0, (unsigned long *) arg);
if (result)
return result;
break;
case LIRC_GET_LENGTH:
return -ENOSYS;
break;
case LIRC_SET_SEND_DUTY_CYCLE:
result = get_user(ivalue, (unsigned int *) arg);
if (result)
return result;
if (ivalue <= 0 || ivalue > 100) {
dev_err(lirc_rx51->dev, ": invalid duty cycle %d\n",
ivalue);
return -EINVAL;
}
lirc_rx51->duty_cycle = ivalue;
break;
case LIRC_SET_SEND_CARRIER:
result = get_user(ivalue, (unsigned int *) arg);
if (result)
return result;
if (ivalue > 500000 || ivalue < 20000) { if (test_and_set_bit(1, &ir_rx51->device_is_open))
dev_err(lirc_rx51->dev, ": invalid carrier freq %d\n", return -EBUSY;
ivalue);
return -EINVAL;
}
lirc_rx51->freq = ivalue;
break;
case LIRC_GET_FEATURES: ir_rx51->pwm = pwm_get(ir_rx51->dev, NULL);
result = put_user(LIRC_RX51_DRIVER_FEATURES, if (IS_ERR(ir_rx51->pwm)) {
(unsigned long *) arg); int res = PTR_ERR(ir_rx51->pwm);
if (result)
return result;
break;
default: dev_err(ir_rx51->dev, "pwm_get failed: %d\n", res);
return -ENOIOCTLCMD; return res;
} }
return 0; return 0;
} }
static int lirc_rx51_open(struct inode *inode, struct file *file) static void ir_rx51_release(struct rc_dev *dev)
{ {
struct lirc_rx51 *lirc_rx51 = lirc_get_pdata(file); struct ir_rx51 *ir_rx51 = dev->priv;
BUG_ON(!lirc_rx51);
file->private_data = lirc_rx51; hrtimer_cancel(&ir_rx51->timer);
ir_rx51_off(ir_rx51);
pwm_put(ir_rx51->pwm);
if (test_and_set_bit(1, &lirc_rx51->device_is_open)) clear_bit(1, &ir_rx51->device_is_open);
return -EBUSY; }
static struct ir_rx51 ir_rx51 = {
.duty_cycle = 50,
.wbuf_index = -1,
};
lirc_rx51->pwm = pwm_get(lirc_rx51->dev, NULL); static int ir_rx51_set_duty_cycle(struct rc_dev *dev, u32 duty)
if (IS_ERR(lirc_rx51->pwm)) { {
int res = PTR_ERR(lirc_rx51->pwm); struct ir_rx51 *ir_rx51 = dev->priv;
dev_err(lirc_rx51->dev, "pwm_get failed: %d\n", res); ir_rx51->duty_cycle = duty;
return res;
}
return 0; return 0;
} }
static int lirc_rx51_release(struct inode *inode, struct file *file) static int ir_rx51_set_tx_carrier(struct rc_dev *dev, u32 carrier)
{ {
struct lirc_rx51 *lirc_rx51 = file->private_data; struct ir_rx51 *ir_rx51 = dev->priv;
hrtimer_cancel(&lirc_rx51->timer); if (carrier > 500000 || carrier < 20000)
lirc_rx51_off(lirc_rx51); return -EINVAL;
pwm_put(lirc_rx51->pwm);
clear_bit(1, &lirc_rx51->device_is_open); ir_rx51->freq = carrier;
return 0; return 0;
} }
static struct lirc_rx51 lirc_rx51 = {
.duty_cycle = 50,
.wbuf_index = -1,
};
static const struct file_operations lirc_fops = {
.owner = THIS_MODULE,
.write = lirc_rx51_write,
.unlocked_ioctl = lirc_rx51_ioctl,
.read = lirc_dev_fop_read,
.poll = lirc_dev_fop_poll,
.open = lirc_rx51_open,
.release = lirc_rx51_release,
};
static struct lirc_driver lirc_rx51_driver = {
.name = DRIVER_NAME,
.minor = -1,
.code_length = 1,
.data = &lirc_rx51,
.fops = &lirc_fops,
.owner = THIS_MODULE,
};
#ifdef CONFIG_PM #ifdef CONFIG_PM
static int lirc_rx51_suspend(struct platform_device *dev, pm_message_t state) static int ir_rx51_suspend(struct platform_device *dev, pm_message_t state)
{ {
/* /*
* In case the device is still open, do not suspend. Normally * In case the device is still open, do not suspend. Normally
...@@ -320,34 +219,34 @@ static int lirc_rx51_suspend(struct platform_device *dev, pm_message_t state) ...@@ -320,34 +219,34 @@ static int lirc_rx51_suspend(struct platform_device *dev, pm_message_t state)
* were in a middle of a transmit. Thus, we defer any suspend * were in a middle of a transmit. Thus, we defer any suspend
* actions until transmit has completed. * actions until transmit has completed.
*/ */
if (test_and_set_bit(1, &lirc_rx51.device_is_open)) if (test_and_set_bit(1, &ir_rx51.device_is_open))
return -EAGAIN; return -EAGAIN;
clear_bit(1, &lirc_rx51.device_is_open); clear_bit(1, &ir_rx51.device_is_open);
return 0; return 0;
} }
static int lirc_rx51_resume(struct platform_device *dev) static int ir_rx51_resume(struct platform_device *dev)
{ {
return 0; return 0;
} }
#else #else
#define lirc_rx51_suspend NULL #define ir_rx51_suspend NULL
#define lirc_rx51_resume NULL #define ir_rx51_resume NULL
#endif /* CONFIG_PM */ #endif /* CONFIG_PM */
static int lirc_rx51_probe(struct platform_device *dev) static int ir_rx51_probe(struct platform_device *dev)
{ {
struct pwm_device *pwm; struct pwm_device *pwm;
struct rc_dev *rcdev;
lirc_rx51_driver.features = LIRC_RX51_DRIVER_FEATURES; ir_rx51.pdata = dev->dev.platform_data;
lirc_rx51.pdata = dev->dev.platform_data;
if (!lirc_rx51.pdata) { if (!ir_rx51.pdata) {
dev_err(&dev->dev, "Platform Data is missing\n"); dev_err(&dev->dev, "Platform Data is missing\n");
return -ENXIO; return -ENXIO;
} }
...@@ -362,51 +261,56 @@ static int lirc_rx51_probe(struct platform_device *dev) ...@@ -362,51 +261,56 @@ static int lirc_rx51_probe(struct platform_device *dev)
} }
/* Use default, in case userspace does not set the carrier */ /* Use default, in case userspace does not set the carrier */
lirc_rx51.freq = DIV_ROUND_CLOSEST(pwm_get_period(pwm), NSEC_PER_SEC); ir_rx51.freq = DIV_ROUND_CLOSEST(pwm_get_period(pwm), NSEC_PER_SEC);
pwm_put(pwm); pwm_put(pwm);
hrtimer_init(&lirc_rx51.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); hrtimer_init(&ir_rx51.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
lirc_rx51.timer.function = lirc_rx51_timer_cb; ir_rx51.timer.function = ir_rx51_timer_cb;
lirc_rx51.dev = &dev->dev; ir_rx51.dev = &dev->dev;
lirc_rx51_driver.dev = &dev->dev;
lirc_rx51_driver.minor = lirc_register_driver(&lirc_rx51_driver);
init_waitqueue_head(&lirc_rx51.wqueue);
if (lirc_rx51_driver.minor < 0) { rcdev = devm_rc_allocate_device(&dev->dev, RC_DRIVER_IR_RAW_TX);
dev_err(lirc_rx51.dev, ": lirc_register_driver failed: %d\n", if (!rcdev)
lirc_rx51_driver.minor); return -ENOMEM;
return lirc_rx51_driver.minor;
}
return 0; rcdev->priv = &ir_rx51;
rcdev->open = ir_rx51_open;
rcdev->close = ir_rx51_release;
rcdev->tx_ir = ir_rx51_tx;
rcdev->s_tx_duty_cycle = ir_rx51_set_duty_cycle;
rcdev->s_tx_carrier = ir_rx51_set_tx_carrier;
rcdev->driver_name = KBUILD_MODNAME;
ir_rx51.rcdev = rcdev;
return devm_rc_register_device(&dev->dev, ir_rx51.rcdev);
} }
static int lirc_rx51_remove(struct platform_device *dev) static int ir_rx51_remove(struct platform_device *dev)
{ {
return lirc_unregister_driver(lirc_rx51_driver.minor); return 0;
} }
static const struct of_device_id lirc_rx51_match[] = { static const struct of_device_id ir_rx51_match[] = {
{ {
.compatible = "nokia,n900-ir", .compatible = "nokia,n900-ir",
}, },
{}, {},
}; };
MODULE_DEVICE_TABLE(of, lirc_rx51_match); MODULE_DEVICE_TABLE(of, ir_rx51_match);
struct platform_driver lirc_rx51_platform_driver = { static struct platform_driver ir_rx51_platform_driver = {
.probe = lirc_rx51_probe, .probe = ir_rx51_probe,
.remove = lirc_rx51_remove, .remove = ir_rx51_remove,
.suspend = lirc_rx51_suspend, .suspend = ir_rx51_suspend,
.resume = lirc_rx51_resume, .resume = ir_rx51_resume,
.driver = { .driver = {
.name = DRIVER_NAME, .name = KBUILD_MODNAME,
.of_match_table = of_match_ptr(lirc_rx51_match), .of_match_table = of_match_ptr(ir_rx51_match),
}, },
}; };
module_platform_driver(lirc_rx51_platform_driver); module_platform_driver(ir_rx51_platform_driver);
MODULE_DESCRIPTION("LIRC TX driver for Nokia RX51"); MODULE_DESCRIPTION("IR TX driver for Nokia RX51");
MODULE_AUTHOR("Nokia Corporation"); MODULE_AUTHOR("Nokia Corporation");
MODULE_LICENSE("GPL"); MODULE_LICENSE("GPL");
#ifndef _LIRC_RX51_H #ifndef _IR_RX51_H
#define _LIRC_RX51_H #define _IR_RX51_H
struct lirc_rx51_platform_data { struct ir_rx51_platform_data {
int(*set_max_mpu_wakeup_lat)(struct device *dev, long t); int(*set_max_mpu_wakeup_lat)(struct device *dev, long t);
}; };
......
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