mirror of
https://github.com/LibreELEC/LibreELEC.tv.git
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projects/RPi/patches/linux: update RPi patches
Signed-off-by: Stephan Raue <stephan@openelec.tv>
This commit is contained in:
Stephan Raue
parent
d990769bab
commit
5c0da4607b
File diff suppressed because it is too large
Load Diff
@ -1,737 +0,0 @@
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From 91abd8700cc73dff72332135c4bdf4cdf7afe2b1 Mon Sep 17 00:00:00 2001
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From: Aron Szabo <aron@aron.ws>
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Date: Sat, 16 Jun 2012 12:15:55 +0200
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Subject: [PATCH] lirc: added support for RaspberryPi GPIO
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---
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drivers/staging/media/lirc/Kconfig | 6 +
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drivers/staging/media/lirc/Makefile | 1 +
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drivers/staging/media/lirc/lirc_rpi.c | 687 +++++++++++++++++++++++++++++++++
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3 files changed, 694 insertions(+)
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create mode 100644 drivers/staging/media/lirc/lirc_rpi.c
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diff --git a/drivers/staging/media/lirc/Kconfig b/drivers/staging/media/lirc/Kconfig
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index 526ec0f..c7c6288 100644
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--- a/drivers/staging/media/lirc/Kconfig
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+++ b/drivers/staging/media/lirc/Kconfig
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@@ -38,6 +38,12 @@ config LIRC_PARALLEL
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help
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Driver for Homebrew Parallel Port Receivers
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+config LIRC_RPI
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+ tristate "Homebrew GPIO Port Receiver/Transmitter for the RaspberryPi"
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+ depends on LIRC
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+ help
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+ Driver for Homebrew GPIO Port Receiver/Transmitter for the RaspberryPi
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+
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config LIRC_SASEM
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tristate "Sasem USB IR Remote"
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depends on LIRC && USB
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diff --git a/drivers/staging/media/lirc/Makefile b/drivers/staging/media/lirc/Makefile
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index d76b0fa..af4be00 100644
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--- a/drivers/staging/media/lirc/Makefile
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+++ b/drivers/staging/media/lirc/Makefile
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@@ -7,6 +7,7 @@ obj-$(CONFIG_LIRC_BT829) += lirc_bt829.o
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obj-$(CONFIG_LIRC_IGORPLUGUSB) += lirc_igorplugusb.o
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obj-$(CONFIG_LIRC_IMON) += lirc_imon.o
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obj-$(CONFIG_LIRC_PARALLEL) += lirc_parallel.o
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+obj-$(CONFIG_LIRC_RPI) += lirc_rpi.o
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obj-$(CONFIG_LIRC_SASEM) += lirc_sasem.o
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obj-$(CONFIG_LIRC_SERIAL) += lirc_serial.o
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obj-$(CONFIG_LIRC_SIR) += lirc_sir.o
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diff --git a/drivers/staging/media/lirc/lirc_rpi.c b/drivers/staging/media/lirc/lirc_rpi.c
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new file mode 100644
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index 0000000..96acab0
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--- /dev/null
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+++ b/drivers/staging/media/lirc/lirc_rpi.c
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@@ -0,0 +1,687 @@
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+/*
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+ * lirc_rpi.c
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+ *
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+ * lirc_rpi - Device driver that records pulse- and pause-lengths
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+ * (space-lengths) (just like the lirc_serial driver does)
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+ * between GPIO interrupt events on the Raspberry Pi.
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+ * Lots of code has been taken from the lirc_serial module,
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+ * so I would like say thanks to the authors.
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+ *
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+ * Copyright (C) 2012 Aron Robert Szabo <aron@reon.hu>,
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+ * Michael Bishop <cleverca22@gmail.com>
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; either version 2 of the License, or
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+ * (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU General Public License
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+ * along with this program; if not, write to the Free Software
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+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/errno.h>
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+#include <linux/interrupt.h>
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+#include <linux/sched.h>
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+#include <linux/kernel.h>
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+#include <linux/time.h>
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+#include <linux/string.h>
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+#include <linux/delay.h>
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+#include <linux/platform_device.h>
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+#include <linux/irq.h>
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+#include <linux/spinlock.h>
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+#include <media/lirc.h>
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+#include <media/lirc_dev.h>
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+#include <linux/gpio.h>
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+
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+#define LIRC_DRIVER_NAME "lirc_rpi"
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+#define RBUF_LEN 256
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+#define LIRC_TRANSMITTER_LATENCY 256
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+
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+#ifndef MAX_UDELAY_MS
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+#define MAX_UDELAY_US 5000
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+#else
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+#define MAX_UDELAY_US (MAX_UDELAY_MS*1000)
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+#endif
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+
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+#define dprintk(fmt, args...) \
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+ do { \
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+ if (debug) \
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+ printk(KERN_DEBUG LIRC_DRIVER_NAME ": " \
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+ fmt, ## args); \
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+ } while (0)
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+
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+/* module parameters */
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+
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+/* set the default GPIO input pin */
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+static int gpio_in_pin = 18;
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+/* set the default GPIO output pin */
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+static int gpio_out_pin = 17;
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+/* enable debugging messages */
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+static int debug;
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+/* -1 = auto, 0 = active high, 1 = active low */
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+static int sense = -1;
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+/* use softcarrier by default */
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+static int softcarrier = 1;
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+
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+struct gpio_chip *gpiochip;
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+struct irq_chip *irqchip;
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+struct irq_data *irqdata;
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+
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+/* forward declarations */
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+static long send_pulse(unsigned long length);
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+static void send_space(long length);
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+static void lirc_rpi_exit(void);
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+
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+int valid_gpio_pins[] = { 0, 1, 4, 8, 7, 9, 10, 11, 14, 15, 17, 18, 21, 22, 23,
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+ 24, 25 };
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+
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+static struct platform_device *lirc_rpi_dev;
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+static struct timeval lasttv = { 0, 0 };
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+static struct lirc_buffer rbuf;
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+static spinlock_t lock;
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+
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+/* initialized/set in init_timing_params() */
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+static unsigned int freq = 38000;
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+static unsigned int duty_cycle = 50;
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+static unsigned long period;
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+static unsigned long pulse_width;
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+static unsigned long space_width;
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+
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+static void safe_udelay(unsigned long usecs)
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+{
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+ while (usecs > MAX_UDELAY_US) {
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+ udelay(MAX_UDELAY_US);
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+ usecs -= MAX_UDELAY_US;
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+ }
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+ udelay(usecs);
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+}
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+
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+static int init_timing_params(unsigned int new_duty_cycle,
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+ unsigned int new_freq)
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+{
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+ /*
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+ * period, pulse/space width are kept with 8 binary places -
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+ * IE multiplied by 256.
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+ */
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+ if (256 * 1000000L / new_freq * new_duty_cycle / 100 <=
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+ LIRC_TRANSMITTER_LATENCY)
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+ return -EINVAL;
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+ if (256 * 1000000L / new_freq * (100 - new_duty_cycle) / 100 <=
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+ LIRC_TRANSMITTER_LATENCY)
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+ return -EINVAL;
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+ duty_cycle = new_duty_cycle;
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+ freq = new_freq;
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+ period = 256 * 1000000L / freq;
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+ pulse_width = period * duty_cycle / 100;
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+ space_width = period - pulse_width;
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+ dprintk("in init_timing_params, freq=%d pulse=%ld, "
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+ "space=%ld\n", freq, pulse_width, space_width);
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+ return 0;
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+}
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+
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+static long send_pulse_softcarrier(unsigned long length)
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+{
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+ int flag;
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+ unsigned long actual, target, d;
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+
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+ length <<= 8;
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+
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+ actual = 0; target = 0; flag = 0;
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+ while (actual < length) {
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+ if (flag) {
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+ gpiochip->set(gpiochip, gpio_out_pin, 0);
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+ target += space_width;
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+ } else {
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+ gpiochip->set(gpiochip, gpio_out_pin, 1);
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+ target += pulse_width;
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+ }
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+ d = (target - actual -
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+ LIRC_TRANSMITTER_LATENCY + 128) >> 8;
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+ /*
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+ * Note - we've checked in ioctl that the pulse/space
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+ * widths are big enough so that d is > 0
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+ */
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+ udelay(d);
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+ actual += (d << 8) + LIRC_TRANSMITTER_LATENCY;
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+ flag = !flag;
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+ }
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+ return (actual-length) >> 8;
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+}
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+
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+static long send_pulse(unsigned long length)
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+{
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+ if (length <= 0)
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+ return 0;
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+
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+ if (softcarrier) {
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+ return send_pulse_softcarrier(length);
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+ } else {
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+ gpiochip->set(gpiochip, gpio_out_pin, 1);
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+ safe_udelay(length);
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+ return 0;
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+ }
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+}
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+
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+static void send_space(long length)
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+{
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+ gpiochip->set(gpiochip, gpio_out_pin, 0);
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+ if (length <= 0)
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+ return;
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+ safe_udelay(length);
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+}
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+
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+static void rbwrite(int l)
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+{
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+ if (lirc_buffer_full(&rbuf)) {
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+ /* no new signals will be accepted */
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+ dprintk("Buffer overrun\n");
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+ return;
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+ }
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+ lirc_buffer_write(&rbuf, (void *)&l);
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+}
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+
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+static void frbwrite(int l)
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+{
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+ /* simple noise filter */
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+ static int pulse, space;
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+ static unsigned int ptr;
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+
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+ if (ptr > 0 && (l & PULSE_BIT)) {
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+ pulse += l & PULSE_MASK;
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+ if (pulse > 250) {
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+ rbwrite(space);
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+ rbwrite(pulse | PULSE_BIT);
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+ ptr = 0;
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+ pulse = 0;
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+ }
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+ return;
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+ }
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+ if (!(l & PULSE_BIT)) {
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+ if (ptr == 0) {
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+ if (l > 20000) {
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+ space = l;
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+ ptr++;
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+ return;
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+ }
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+ } else {
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+ if (l > 20000) {
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+ space += pulse;
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+ if (space > PULSE_MASK)
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+ space = PULSE_MASK;
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+ space += l;
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+ if (space > PULSE_MASK)
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+ space = PULSE_MASK;
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+ pulse = 0;
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+ return;
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+ }
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+ rbwrite(space);
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+ rbwrite(pulse | PULSE_BIT);
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+ ptr = 0;
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+ pulse = 0;
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+ }
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+ }
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+ rbwrite(l);
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+}
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+
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+static irqreturn_t irq_handler(int i, void *blah, struct pt_regs *regs)
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+{
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+ struct timeval tv;
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+ long deltv;
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+ int data;
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+ int signal;
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+
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+ /* use the GPIO signal level */
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+ signal = gpiochip->get(gpiochip, gpio_in_pin);
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+
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+ /* unmask the irq */
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+ irqchip->irq_unmask(irqdata);
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+
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+ if (sense != -1) {
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+ /* get current time */
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+ do_gettimeofday(&tv);
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+
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+ /* calc time since last interrupt in microseconds */
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+ deltv = tv.tv_sec-lasttv.tv_sec;
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+ if (tv.tv_sec < lasttv.tv_sec ||
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+ (tv.tv_sec == lasttv.tv_sec &&
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+ tv.tv_usec < lasttv.tv_usec)) {
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+ printk(KERN_WARNING LIRC_DRIVER_NAME
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+ ": AIEEEE: your clock just jumped backwards\n");
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+ printk(KERN_WARNING LIRC_DRIVER_NAME
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+ ": %d %d %lx %lx %lx %lx\n", signal, sense,
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+ tv.tv_sec, lasttv.tv_sec,
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+ tv.tv_usec, lasttv.tv_usec);
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+ data = PULSE_MASK;
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+ } else if (deltv > 15) {
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+ data = PULSE_MASK; /* really long time */
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+ if (!(signal^sense)) {
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+ /* sanity check */
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+ printk(KERN_WARNING LIRC_DRIVER_NAME
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+ ": AIEEEE: %d %d %lx %lx %lx %lx\n",
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+ signal, sense, tv.tv_sec, lasttv.tv_sec,
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+ tv.tv_usec, lasttv.tv_usec);
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+ /*
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+ * detecting pulse while this
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+ * MUST be a space!
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+ */
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+ sense = sense ? 0 : 1;
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+ }
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+ } else {
|
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+ data = (int) (deltv*1000000 +
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+ (tv.tv_usec - lasttv.tv_usec));
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+ }
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+ frbwrite(signal^sense ? data : (data|PULSE_BIT));
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+ lasttv = tv;
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+ wake_up_interruptible(&rbuf.wait_poll);
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+ }
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+
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+ return IRQ_HANDLED;
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+}
|
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+
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+static int is_right_chip(struct gpio_chip *chip, void *data)
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+{
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+ dprintk("is_right_chip %s %d\n", chip->label, strcmp(data, chip->label));
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+
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+ if (strcmp(data, chip->label) == 0)
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+ return 1;
|
||||
+ return 0;
|
||||
+}
|
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+
|
||||
+static int init_port(void)
|
||||
+{
|
||||
+ int i, nlow, nhigh, ret, irq;
|
||||
+
|
||||
+ gpiochip = gpiochip_find("bcm2708_gpio", is_right_chip);
|
||||
+
|
||||
+ if (!gpiochip)
|
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+ return -ENODEV;
|
||||
+
|
||||
+ if (gpio_request(gpio_out_pin, LIRC_DRIVER_NAME " ir/out")) {
|
||||
+ printk(KERN_ALERT LIRC_DRIVER_NAME
|
||||
+ ": cant claim gpio pin %d\n", gpio_out_pin);
|
||||
+ ret = -ENODEV;
|
||||
+ goto exit_init_port;
|
||||
+ }
|
||||
+
|
||||
+ if (gpio_request(gpio_in_pin, LIRC_DRIVER_NAME " ir/in")) {
|
||||
+ printk(KERN_ALERT LIRC_DRIVER_NAME
|
||||
+ ": cant claim gpio pin %d\n", gpio_in_pin);
|
||||
+ ret = -ENODEV;
|
||||
+ goto exit_gpio_free_out_pin;
|
||||
+ }
|
||||
+
|
||||
+ gpiochip->direction_input(gpiochip, gpio_in_pin);
|
||||
+ gpiochip->direction_output(gpiochip, gpio_out_pin, 1);
|
||||
+ gpiochip->set(gpiochip, gpio_out_pin, 0);
|
||||
+
|
||||
+ irq = gpiochip->to_irq(gpiochip, gpio_in_pin);
|
||||
+ dprintk("to_irq %d\n", irq);
|
||||
+ irqdata = irq_get_irq_data(irq);
|
||||
+
|
||||
+ if (irqdata && irqdata->chip) {
|
||||
+ irqchip = irqdata->chip;
|
||||
+ } else {
|
||||
+ ret = -ENODEV;
|
||||
+ goto exit_gpio_free_in_pin;
|
||||
+ }
|
||||
+
|
||||
+ /* if pin is high, then this must be an active low receiver. */
|
||||
+ if (sense == -1) {
|
||||
+ /* wait 1/2 sec for the power supply */
|
||||
+ msleep(500);
|
||||
+
|
||||
+ /*
|
||||
+ * probe 9 times every 0.04s, collect "votes" for
|
||||
+ * active high/low
|
||||
+ */
|
||||
+ nlow = 0;
|
||||
+ nhigh = 0;
|
||||
+ for (i = 0; i < 9; i++) {
|
||||
+ if (gpiochip->get(gpiochip, gpio_in_pin))
|
||||
+ nlow++;
|
||||
+ else
|
||||
+ nhigh++;
|
||||
+ msleep(40);
|
||||
+ }
|
||||
+ sense = (nlow >= nhigh ? 1 : 0);
|
||||
+ printk(KERN_INFO LIRC_DRIVER_NAME
|
||||
+ ": auto-detected active %s receiver on GPIO pin %d\n",
|
||||
+ sense ? "low" : "high", gpio_in_pin);
|
||||
+ } else {
|
||||
+ printk(KERN_INFO LIRC_DRIVER_NAME
|
||||
+ ": manually using active %s receiver on GPIO pin %d\n",
|
||||
+ sense ? "low" : "high", gpio_in_pin);
|
||||
+ }
|
||||
+
|
||||
+ return 0;
|
||||
+
|
||||
+ exit_gpio_free_in_pin:
|
||||
+ gpio_free(gpio_in_pin);
|
||||
+
|
||||
+ exit_gpio_free_out_pin:
|
||||
+ gpio_free(gpio_out_pin);
|
||||
+
|
||||
+ exit_init_port:
|
||||
+ return ret;
|
||||
+}
|
||||
+
|
||||
+// called when the character device is opened
|
||||
+static int set_use_inc(void *data)
|
||||
+{
|
||||
+ int result;
|
||||
+ unsigned long flags;
|
||||
+
|
||||
+ /* initialize timestamp */
|
||||
+ do_gettimeofday(&lasttv);
|
||||
+
|
||||
+ result = request_irq(gpiochip->to_irq(gpiochip, gpio_in_pin),
|
||||
+ (irq_handler_t) irq_handler, 0,
|
||||
+ LIRC_DRIVER_NAME, (void*) 0);
|
||||
+
|
||||
+ switch (result) {
|
||||
+ case -EBUSY:
|
||||
+ printk(KERN_ERR LIRC_DRIVER_NAME
|
||||
+ ": IRQ %d is busy\n",
|
||||
+ gpiochip->to_irq(gpiochip, gpio_in_pin));
|
||||
+ return -EBUSY;
|
||||
+ case -EINVAL:
|
||||
+ printk(KERN_ERR LIRC_DRIVER_NAME
|
||||
+ ": Bad irq number or handler\n");
|
||||
+ return -EINVAL;
|
||||
+ default:
|
||||
+ dprintk("Interrupt %d obtained\n",
|
||||
+ gpiochip->to_irq(gpiochip, gpio_in_pin));
|
||||
+ break;
|
||||
+ };
|
||||
+
|
||||
+ /* initialize pulse/space widths */
|
||||
+ init_timing_params(duty_cycle, freq);
|
||||
+
|
||||
+ spin_lock_irqsave(&lock, flags);
|
||||
+
|
||||
+ /* GPIO Pin Falling/Rising Edge Detect Enable */
|
||||
+ irqchip->irq_set_type(irqdata,
|
||||
+ IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING);
|
||||
+
|
||||
+ /* unmask the irq */
|
||||
+ irqchip->irq_unmask(irqdata);
|
||||
+
|
||||
+ spin_unlock_irqrestore(&lock, flags);
|
||||
+
|
||||
+ return 0;
|
||||
+}
|
||||
+
|
||||
+static void set_use_dec(void *data)
|
||||
+{
|
||||
+ unsigned long flags;
|
||||
+
|
||||
+ spin_lock_irqsave(&lock, flags);
|
||||
+
|
||||
+ /* GPIO Pin Falling/Rising Edge Detect Disable */
|
||||
+ irqchip->irq_set_type(irqdata, 0);
|
||||
+ irqchip->irq_mask(irqdata);
|
||||
+
|
||||
+ spin_unlock_irqrestore(&lock, flags);
|
||||
+
|
||||
+ free_irq(gpiochip->to_irq(gpiochip, gpio_in_pin), (void *) 0);
|
||||
+
|
||||
+ dprintk(KERN_INFO LIRC_DRIVER_NAME
|
||||
+ ": freed IRQ %d\n", gpiochip->to_irq(gpiochip, gpio_in_pin));
|
||||
+}
|
||||
+
|
||||
+static ssize_t lirc_write(struct file *file, const char *buf,
|
||||
+ size_t n, loff_t *ppos)
|
||||
+{
|
||||
+ int i, count;
|
||||
+ unsigned long flags;
|
||||
+ long delta = 0;
|
||||
+ int *wbuf;
|
||||
+
|
||||
+ count = n / sizeof(int);
|
||||
+ if (n % sizeof(int) || count % 2 == 0)
|
||||
+ return -EINVAL;
|
||||
+ wbuf = memdup_user(buf, n);
|
||||
+ if (IS_ERR(wbuf))
|
||||
+ return PTR_ERR(wbuf);
|
||||
+ spin_lock_irqsave(&lock, flags);
|
||||
+
|
||||
+ for (i = 0; i < count; i++) {
|
||||
+ if (i%2)
|
||||
+ send_space(wbuf[i] - delta);
|
||||
+ else
|
||||
+ delta = send_pulse(wbuf[i]);
|
||||
+ }
|
||||
+ gpiochip->set(gpiochip, gpio_out_pin, 0);
|
||||
+
|
||||
+ spin_unlock_irqrestore(&lock, flags);
|
||||
+ kfree(wbuf);
|
||||
+ return n;
|
||||
+}
|
||||
+
|
||||
+static long lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
|
||||
+{
|
||||
+ int result;
|
||||
+ __u32 value;
|
||||
+
|
||||
+ switch (cmd) {
|
||||
+ case LIRC_GET_SEND_MODE:
|
||||
+ return -ENOIOCTLCMD;
|
||||
+ break;
|
||||
+
|
||||
+ case LIRC_SET_SEND_MODE:
|
||||
+ result = get_user(value, (__u32 *) arg);
|
||||
+ if (result)
|
||||
+ return result;
|
||||
+ /* only LIRC_MODE_PULSE supported */
|
||||
+ if (value != LIRC_MODE_PULSE)
|
||||
+ return -ENOSYS;
|
||||
+ break;
|
||||
+
|
||||
+ case LIRC_GET_LENGTH:
|
||||
+ return -ENOSYS;
|
||||
+ break;
|
||||
+
|
||||
+ case LIRC_SET_SEND_DUTY_CYCLE:
|
||||
+ dprintk("SET_SEND_DUTY_CYCLE\n");
|
||||
+ result = get_user(value, (__u32 *) arg);
|
||||
+ if (result)
|
||||
+ return result;
|
||||
+ if (value <= 0 || value > 100)
|
||||
+ return -EINVAL;
|
||||
+ return init_timing_params(value, freq);
|
||||
+ break;
|
||||
+
|
||||
+ case LIRC_SET_SEND_CARRIER:
|
||||
+ dprintk("SET_SEND_CARRIER\n");
|
||||
+ result = get_user(value, (__u32 *) arg);
|
||||
+ if (result)
|
||||
+ return result;
|
||||
+ if (value > 500000 || value < 20000)
|
||||
+ return -EINVAL;
|
||||
+ return init_timing_params(duty_cycle, value);
|
||||
+ break;
|
||||
+
|
||||
+ default:
|
||||
+ return lirc_dev_fop_ioctl(filep, cmd, arg);
|
||||
+ }
|
||||
+ return 0;
|
||||
+}
|
||||
+
|
||||
+static const struct file_operations lirc_fops = {
|
||||
+ .owner = THIS_MODULE,
|
||||
+ .write = lirc_write,
|
||||
+ .unlocked_ioctl = lirc_ioctl,
|
||||
+ .read = lirc_dev_fop_read,
|
||||
+ .poll = lirc_dev_fop_poll,
|
||||
+ .open = lirc_dev_fop_open,
|
||||
+ .release = lirc_dev_fop_close,
|
||||
+ .llseek = no_llseek,
|
||||
+};
|
||||
+
|
||||
+static struct lirc_driver driver = {
|
||||
+ .name = LIRC_DRIVER_NAME,
|
||||
+ .minor = -1,
|
||||
+ .code_length = 1,
|
||||
+ .sample_rate = 0,
|
||||
+ .data = NULL,
|
||||
+ .add_to_buf = NULL,
|
||||
+ .rbuf = &rbuf,
|
||||
+ .set_use_inc = set_use_inc,
|
||||
+ .set_use_dec = set_use_dec,
|
||||
+ .fops = &lirc_fops,
|
||||
+ .dev = NULL,
|
||||
+ .owner = THIS_MODULE,
|
||||
+};
|
||||
+
|
||||
+static struct platform_driver lirc_rpi_driver = {
|
||||
+ .driver = {
|
||||
+ .name = LIRC_DRIVER_NAME,
|
||||
+ .owner = THIS_MODULE,
|
||||
+ },
|
||||
+};
|
||||
+
|
||||
+static int __init lirc_rpi_init(void)
|
||||
+{
|
||||
+ int result;
|
||||
+
|
||||
+ /* Init read buffer. */
|
||||
+ result = lirc_buffer_init(&rbuf, sizeof(int), RBUF_LEN);
|
||||
+ if (result < 0)
|
||||
+ return -ENOMEM;
|
||||
+
|
||||
+ result = platform_driver_register(&lirc_rpi_driver);
|
||||
+ if (result) {
|
||||
+ printk(KERN_ERR LIRC_DRIVER_NAME
|
||||
+ ": lirc register returned %d\n", result);
|
||||
+ goto exit_buffer_free;
|
||||
+ }
|
||||
+
|
||||
+ lirc_rpi_dev = platform_device_alloc(LIRC_DRIVER_NAME, 0);
|
||||
+ if (!lirc_rpi_dev) {
|
||||
+ result = -ENOMEM;
|
||||
+ goto exit_driver_unregister;
|
||||
+ }
|
||||
+
|
||||
+ result = platform_device_add(lirc_rpi_dev);
|
||||
+ if (result)
|
||||
+ goto exit_device_put;
|
||||
+
|
||||
+ return 0;
|
||||
+
|
||||
+ exit_device_put:
|
||||
+ platform_device_put(lirc_rpi_dev);
|
||||
+
|
||||
+ exit_driver_unregister:
|
||||
+ platform_driver_unregister(&lirc_rpi_driver);
|
||||
+
|
||||
+ exit_buffer_free:
|
||||
+ lirc_buffer_free(&rbuf);
|
||||
+
|
||||
+ return result;
|
||||
+}
|
||||
+
|
||||
+static void lirc_rpi_exit(void)
|
||||
+{
|
||||
+ gpio_free(gpio_out_pin);
|
||||
+ gpio_free(gpio_in_pin);
|
||||
+ platform_device_unregister(lirc_rpi_dev);
|
||||
+ platform_driver_unregister(&lirc_rpi_driver);
|
||||
+ lirc_buffer_free(&rbuf);
|
||||
+}
|
||||
+
|
||||
+static int __init lirc_rpi_init_module(void)
|
||||
+{
|
||||
+ int result, i;
|
||||
+
|
||||
+ result = lirc_rpi_init();
|
||||
+ if (result)
|
||||
+ return result;
|
||||
+
|
||||
+ /* check if the module received valid gpio pin numbers */
|
||||
+ result = 0;
|
||||
+ if (gpio_in_pin != gpio_out_pin) {
|
||||
+ for(i = 0; (i < ARRAY_SIZE(valid_gpio_pins)) && (result != 2); i++) {
|
||||
+ if (gpio_in_pin == valid_gpio_pins[i] ||
|
||||
+ gpio_out_pin == valid_gpio_pins[i]) {
|
||||
+ result++;
|
||||
+ }
|
||||
+ }
|
||||
+ }
|
||||
+
|
||||
+ if (result != 2) {
|
||||
+ result = -EINVAL;
|
||||
+ printk(KERN_ERR LIRC_DRIVER_NAME
|
||||
+ ": invalid GPIO pin(s) specified!\n");
|
||||
+ goto exit_rpi;
|
||||
+ }
|
||||
+
|
||||
+ driver.features = LIRC_CAN_SET_SEND_DUTY_CYCLE |
|
||||
+ LIRC_CAN_SET_SEND_CARRIER |
|
||||
+ LIRC_CAN_SEND_PULSE |
|
||||
+ LIRC_CAN_REC_MODE2;
|
||||
+
|
||||
+ driver.dev = &lirc_rpi_dev->dev;
|
||||
+ driver.minor = lirc_register_driver(&driver);
|
||||
+
|
||||
+ if (driver.minor < 0) {
|
||||
+ printk(KERN_ERR LIRC_DRIVER_NAME
|
||||
+ ": device registration failed with %d\n", result);
|
||||
+ result = -EIO;
|
||||
+ goto exit_rpi;
|
||||
+ }
|
||||
+
|
||||
+ printk(KERN_INFO LIRC_DRIVER_NAME ": driver registered!\n");
|
||||
+
|
||||
+ result = init_port();
|
||||
+ if (result < 0)
|
||||
+ goto exit_rpi;
|
||||
+
|
||||
+ return 0;
|
||||
+
|
||||
+ exit_rpi:
|
||||
+ lirc_rpi_exit();
|
||||
+
|
||||
+ return result;
|
||||
+}
|
||||
+
|
||||
+static void __exit lirc_rpi_exit_module(void)
|
||||
+{
|
||||
+ lirc_rpi_exit();
|
||||
+
|
||||
+ lirc_unregister_driver(driver.minor);
|
||||
+ printk(KERN_INFO LIRC_DRIVER_NAME ": cleaned up module\n");
|
||||
+}
|
||||
+
|
||||
+module_init(lirc_rpi_init_module);
|
||||
+module_exit(lirc_rpi_exit_module);
|
||||
+
|
||||
+MODULE_DESCRIPTION("Infra-red receiver and blaster driver for Raspberry Pi GPIO.");
|
||||
+MODULE_AUTHOR("Aron Robert Szabo <aron@reon.hu>");
|
||||
+MODULE_AUTHOR("Michael Bishop <cleverca22@gmail.com>");
|
||||
+MODULE_LICENSE("GPL");
|
||||
+
|
||||
+module_param(gpio_out_pin, int, S_IRUGO);
|
||||
+MODULE_PARM_DESC(gpio_out_pin, "GPIO output/transmitter pin number of the BCM"
|
||||
+ " processor. Valid pin numbers are: 0, 1, 4, 8, 7, 9, 10, 11,"
|
||||
+ " 14, 15, 17, 18, 21, 22, 23, 24, 25, default 17");
|
||||
+
|
||||
+module_param(gpio_in_pin, int, S_IRUGO);
|
||||
+MODULE_PARM_DESC(gpio_in_pin, "GPIO input pin number of the BCM processor."
|
||||
+ " Valid pin numbers are: 0, 1, 4, 8, 7, 9, 10, 11, 14, 15,"
|
||||
+ " 17, 18, 21, 22, 23, 24, 25, default 18");
|
||||
+
|
||||
+module_param(sense, bool, S_IRUGO);
|
||||
+MODULE_PARM_DESC(sense, "Override autodetection of IR receiver circuit"
|
||||
+ " (0 = active high, 1 = active low )");
|
||||
+
|
||||
+module_param(softcarrier, bool, S_IRUGO);
|
||||
+MODULE_PARM_DESC(softcarrier, "Software carrier (0 = off, 1 = on, default on)");
|
||||
+
|
||||
+module_param(debug, bool, S_IRUGO | S_IWUSR);
|
||||
+MODULE_PARM_DESC(debug, "Enable debugging messages");
|
||||
--
|
||||
1.7.10
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user