@@ -66,6 +66,16 @@ config IR_SONY_DECODER
Enable this option if you have an infrared remote control which
uses the Sony protocol, and you need software decoding support.
+config IR_LIRC_CODEC
+ tristate "Enable IR to LIRC bridge"
+ depends on IR_CORE
+ depends on LIRC
+ default y
+
+ ---help---
+ Enable this option to pass raw IR to and from userspace via
+ the LIRC interface.
+
config IR_IMON
tristate "SoundGraph iMON Receiver and Display"
depends on USB_ARCH_HAS_HCD
@@ -11,6 +11,7 @@ obj-$(CONFIG_IR_RC5_DECODER) += ir-rc5-decoder.o
obj-$(CONFIG_IR_RC6_DECODER) += ir-rc6-decoder.o
obj-$(CONFIG_IR_JVC_DECODER) += ir-jvc-decoder.o
obj-$(CONFIG_IR_SONY_DECODER) += ir-sony-decoder.o
+obj-$(CONFIG_IR_LIRC_CODEC) += ir-lirc-codec.o
# stand-alone IR receivers/transmitters
obj-$(CONFIG_IR_IMON) += imon.o
@@ -122,4 +122,11 @@ void ir_raw_init(void);
#define load_sony_decode() 0
#endif
+/* from ir-lirc-codec.c */
+#ifdef CONFIG_IR_LIRC_CODEC_MODULE
+#define load_lirc_codec() request_module("ir-lirc-codec")
+#else
+#define load_lirc_codec() 0
+#endif
+
#endif /* _IR_RAW_EVENT */
new file mode 100644
@@ -0,0 +1,301 @@
+/* ir-lirc-codec.c - ir-core to classic lirc interface bridge
+ *
+ * Copyright (C) 2010 by Jarod Wilson <jarod@redhat.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 version 2 of the License.
+ *
+ * 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.
+ */
+
+#include <linux/sched.h>
+#include <linux/wait.h>
+#include <media/lirc.h>
+#include <media/ir-core.h>
+#include "ir-core-priv.h"
+#include "lirc_dev.h"
+
+/* Used to register lirc_codec clients */
+static LIST_HEAD(decoder_list);
+static DEFINE_SPINLOCK(decoder_lock);
+
+struct decoder_data {
+ struct list_head list;
+ struct ir_input_dev *ir_dev;
+ int enabled:1;
+
+ /* lirc interface bits */
+ struct lirc_driver *drv;
+ int lircdata;
+};
+
+#define LIRCBUF_SIZE 256
+
+/**
+ * get_decoder_data() - gets decoder data
+ * @ir_input_dev: input device
+ *
+ * Returns the struct decoder_data that corresponds to a device
+ */
+static struct decoder_data *get_decoder_data(struct ir_input_dev *ir_dev)
+{
+ struct decoder_data *data = NULL;
+
+ spin_lock(&decoder_lock);
+ list_for_each_entry(data, &decoder_list, list) {
+ if (data->ir_dev == ir_dev)
+ break;
+ }
+ spin_unlock(&decoder_lock);
+ return data;
+}
+
+static ssize_t store_enabled(struct device *d,
+ struct device_attribute *mattr,
+ const char *buf,
+ size_t len)
+{
+ unsigned long value;
+ struct ir_input_dev *ir_dev = dev_get_drvdata(d);
+ struct decoder_data *data = get_decoder_data(ir_dev);
+
+ if (!data)
+ return -EINVAL;
+
+ if (strict_strtoul(buf, 10, &value) || value > 1)
+ return -EINVAL;
+
+ data->enabled = value;
+
+ return len;
+}
+
+static ssize_t show_enabled(struct device *d,
+ struct device_attribute *mattr, char *buf)
+{
+ struct ir_input_dev *ir_dev = dev_get_drvdata(d);
+ struct decoder_data *data = get_decoder_data(ir_dev);
+
+ if (!data)
+ return -EINVAL;
+
+ if (data->enabled)
+ return sprintf(buf, "1\n");
+ else
+ return sprintf(buf, "0\n");
+}
+
+static DEVICE_ATTR(enabled, S_IRUGO | S_IWUSR, show_enabled, store_enabled);
+
+static struct attribute *decoder_attributes[] = {
+ &dev_attr_enabled.attr,
+ NULL
+};
+
+static struct attribute_group decoder_attribute_group = {
+ .name = "lirc_codec",
+ .attrs = decoder_attributes,
+};
+
+/**
+ * ir_lirc_decode() - Send raw IR data to lirc_dev to be relayed to the
+ * lircd userspace daemon for decoding.
+ * @input_dev: the struct input_dev descriptor of the device
+ * @duration: the struct ir_raw_event descriptor of the pulse/space
+ *
+ * This function returns -EINVAL if the lirc interfaces aren't wired up.
+ */
+static int ir_lirc_decode(struct input_dev *input_dev, struct ir_raw_event ev)
+{
+ struct decoder_data *data;
+ struct ir_input_dev *ir_dev = input_get_drvdata(input_dev);
+
+ data = get_decoder_data(ir_dev);
+ if (!data)
+ return -EINVAL;
+
+ if (!data->enabled)
+ return 0;
+
+ if (!data->drv || !data->drv->rbuf)
+ return -EINVAL;
+
+ IR_dprintk(2, "LIRC data transfer started (%uus %s)\n",
+ TO_US(ev.duration), TO_STR(ev.pulse));
+
+ data->lircdata += ev.duration / 1000;
+ if (ev.pulse)
+ data->lircdata |= PULSE_BIT;
+
+ lirc_buffer_write(data->drv->rbuf, (unsigned char *) &data->lircdata);
+ wake_up(&data->drv->rbuf->wait_poll);
+
+ data->lircdata = 0;
+
+ return 0;
+}
+
+static int ir_lirc_ioctl(struct inode *node, struct file *filep,
+ unsigned int cmd, unsigned long arg)
+{
+ struct decoder_data *data;
+
+ data = lirc_get_pdata(filep);
+ if (!data)
+ return -EFAULT;
+
+ switch (cmd) {
+ case LIRC_SET_TRANSMITTER_MASK:
+ /* FIXME: implement this */
+ break;
+ default:
+ return lirc_dev_fop_ioctl(node, filep, cmd, arg);
+ }
+
+ return 0;
+}
+
+static int ir_lirc_open(void *data)
+{
+ return 0;
+}
+
+static void ir_lirc_close(void *data)
+{
+ return;
+}
+
+static struct file_operations lirc_fops = {
+ .owner = THIS_MODULE,
+ /*.write = lirc_transmit_ir,*/
+ .ioctl = ir_lirc_ioctl,
+ .read = lirc_dev_fop_read,
+ .poll = lirc_dev_fop_poll,
+ .open = lirc_dev_fop_open,
+ .release = lirc_dev_fop_close,
+};
+
+static int ir_lirc_register(struct input_dev *input_dev)
+{
+ struct ir_input_dev *ir_dev = input_get_drvdata(input_dev);
+ struct decoder_data *data;
+ struct lirc_driver *drv;
+ struct lirc_buffer *rbuf;
+ int rc;
+
+ rc = sysfs_create_group(&ir_dev->dev.kobj, &decoder_attribute_group);
+ if (rc < 0)
+ return rc;
+
+ rc = -ENOMEM;
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data) {
+ sysfs_remove_group(&ir_dev->dev.kobj, &decoder_attribute_group);
+ return rc;
+ }
+
+ drv = kzalloc(sizeof(struct lirc_driver), GFP_KERNEL);
+ if (!drv)
+ goto drv_alloc_failed;
+
+ rbuf = kzalloc(sizeof(struct lirc_buffer), GFP_KERNEL);
+ if (!drv)
+ goto rbuf_alloc_failed;
+
+ rc = lirc_buffer_init(rbuf, sizeof(int), LIRCBUF_SIZE);
+ if (rc)
+ goto rbuf_init_failed;
+
+ strcpy(drv->name, "ir-lirc-codec");
+ drv->minor = -1;
+ drv->features = LIRC_CAN_REC_MODE2;
+ drv->data = data;
+ drv->rbuf = rbuf;
+ drv->set_use_inc = &ir_lirc_open;
+ drv->set_use_dec = &ir_lirc_close;
+ drv->code_length = sizeof(struct ir_raw_event) * 8;
+ drv->fops = &lirc_fops;
+ drv->dev = &ir_dev->dev;
+ drv->owner = THIS_MODULE;
+
+ drv->minor = lirc_register_driver(drv);
+ if (drv->minor < 0) {
+ rc = -ENODEV;
+ goto lirc_register_failed;
+ }
+
+ data->ir_dev = ir_dev;
+ data->enabled = 1;
+ data->drv = drv;
+ data->lircdata = PULSE_MASK;
+
+ spin_lock(&decoder_lock);
+ list_add_tail(&data->list, &decoder_list);
+ spin_unlock(&decoder_lock);
+
+ return 0;
+
+lirc_register_failed:
+rbuf_init_failed:
+ kfree(rbuf);
+rbuf_alloc_failed:
+ kfree(drv);
+drv_alloc_failed:
+ kfree(data);
+
+ return rc;
+}
+
+static int ir_lirc_unregister(struct input_dev *input_dev)
+{
+ struct ir_input_dev *ir_dev = input_get_drvdata(input_dev);
+ static struct decoder_data *data;
+
+ data = get_decoder_data(ir_dev);
+ if (!data)
+ return 0;
+
+ sysfs_remove_group(&ir_dev->dev.kobj, &decoder_attribute_group);
+
+ lirc_unregister_driver(data->drv->minor);
+ kfree(data->drv);
+
+ spin_lock(&decoder_lock);
+ list_del(&data->list);
+ spin_unlock(&decoder_lock);
+
+ kfree(data);
+
+ return 0;
+}
+
+static struct ir_raw_handler lirc_handler = {
+ .decode = ir_lirc_decode,
+ .raw_register = ir_lirc_register,
+ .raw_unregister = ir_lirc_unregister,
+};
+
+static int __init ir_lirc_codec_init(void)
+{
+ ir_raw_handler_register(&lirc_handler);
+
+ printk(KERN_INFO "IR LIRC bridge handler initialized\n");
+ return 0;
+}
+
+static void __exit ir_lirc_codec_exit(void)
+{
+ ir_raw_handler_unregister(&lirc_handler);
+}
+
+module_init(ir_lirc_codec_init);
+module_exit(ir_lirc_codec_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jarod Wilson <jarod@redhat.com>");
+MODULE_AUTHOR("Red Hat Inc. (http://www.redhat.com)");
+MODULE_DESCRIPTION("LIRC IR handler bridge");
@@ -234,6 +234,7 @@ static void init_decoders(struct work_struct *work)
load_rc6_decode();
load_jvc_decode();
load_sony_decode();
+ load_lirc_codec();
/* If needed, we may later add some init code. In this case,
it is needed to change the CONFIG_MODULE test at ir-core.h