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lirc_rpi: Added inverted transmitter support #228

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merged 1 commit into from
Feb 24, 2013
Merged

lirc_rpi: Added inverted transmitter support #228

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17 changes: 11 additions & 6 deletions drivers/staging/media/lirc/lirc_rpi.c
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Original file line number Diff line number Diff line change
Expand Up @@ -68,6 +68,8 @@ static int debug;
static int sense = -1;
/* use softcarrier by default */
static int softcarrier = 1;
/* 0 = do not invert output, 1 = invert output */
static int invert = 0;

struct gpio_chip *gpiochip;
struct irq_chip *irqchip;
Expand Down Expand Up @@ -135,10 +137,10 @@ static long send_pulse_softcarrier(unsigned long length)
actual = 0; target = 0; flag = 0;
while (actual < length) {
if (flag) {
gpiochip->set(gpiochip, gpio_out_pin, 0);
gpiochip->set(gpiochip, gpio_out_pin, invert);
target += space_width;
} else {
gpiochip->set(gpiochip, gpio_out_pin, 1);
gpiochip->set(gpiochip, gpio_out_pin, !invert);
target += pulse_width;
}
d = (target - actual -
Expand All @@ -162,15 +164,15 @@ static long send_pulse(unsigned long length)
if (softcarrier) {
return send_pulse_softcarrier(length);
} else {
gpiochip->set(gpiochip, gpio_out_pin, 1);
gpiochip->set(gpiochip, gpio_out_pin, !invert);
safe_udelay(length);
return 0;
}
}

static void send_space(long length)
{
gpiochip->set(gpiochip, gpio_out_pin, 0);
gpiochip->set(gpiochip, gpio_out_pin, invert);
if (length <= 0)
return;
safe_udelay(length);
Expand Down Expand Up @@ -318,7 +320,7 @@ static int init_port(void)

gpiochip->direction_input(gpiochip, gpio_in_pin);
gpiochip->direction_output(gpiochip, gpio_out_pin, 1);
gpiochip->set(gpiochip, gpio_out_pin, 0);
gpiochip->set(gpiochip, gpio_out_pin, invert);

irq = gpiochip->to_irq(gpiochip, gpio_in_pin);
dprintk("to_irq %d\n", irq);
Expand Down Expand Up @@ -457,7 +459,7 @@ static ssize_t lirc_write(struct file *file, const char *buf,
else
delta = send_pulse(wbuf[i]);
}
gpiochip->set(gpiochip, gpio_out_pin, 0);
gpiochip->set(gpiochip, gpio_out_pin, invert);

spin_unlock_irqrestore(&lock, flags);
kfree(wbuf);
Expand Down Expand Up @@ -683,5 +685,8 @@ MODULE_PARM_DESC(sense, "Override autodetection of IR receiver circuit"
module_param(softcarrier, bool, S_IRUGO);
MODULE_PARM_DESC(softcarrier, "Software carrier (0 = off, 1 = on, default on)");

module_param(invert, bool, S_IRUGO);
MODULE_PARM_DESC(invert, "Invert output (0 = off, 1 = on, default off");

module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Enable debugging messages");