From patchwork Sat Jul 3 04:07:53 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jarod Wilson X-Patchwork-Id: 109982 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.4/8.14.3) with ESMTP id o6347v3i002802 for ; Sat, 3 Jul 2010 04:07:57 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750776Ab0GCEHz (ORCPT ); Sat, 3 Jul 2010 00:07:55 -0400 Received: from mx1.redhat.com ([209.132.183.28]:30637 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1749667Ab0GCEHz (ORCPT ); Sat, 3 Jul 2010 00:07:55 -0400 Received: from int-mx08.intmail.prod.int.phx2.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.21]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id o6347sD8001156 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Sat, 3 Jul 2010 00:07:55 -0400 Received: from ihatethathostname.lab.bos.redhat.com (ihatethathostname.lab.bos.redhat.com [10.16.43.238]) by int-mx08.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id o6347sEC012710 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Sat, 3 Jul 2010 00:07:54 -0400 Received: from ihatethathostname.lab.bos.redhat.com (ihatethathostname.lab.bos.redhat.com [127.0.0.1]) by ihatethathostname.lab.bos.redhat.com (8.14.4/8.14.3) with ESMTP id o6347rmn031511 for ; Sat, 3 Jul 2010 00:07:53 -0400 Received: (from jarod@localhost) by ihatethathostname.lab.bos.redhat.com (8.14.4/8.14.4/Submit) id o6347rPn031510 for linux-media@vger.kernel.org; Sat, 3 Jul 2010 00:07:53 -0400 X-Authentication-Warning: ihatethathostname.lab.bos.redhat.com: jarod set sender to jarod@redhat.com using -f Date: Sat, 3 Jul 2010 00:07:53 -0400 From: Jarod Wilson To: linux-media@vger.kernel.org Subject: [PATCH v2 2/3] IR: add ir-core to lirc userspace decoder bridge driver Message-ID: <20100703040753.GD31255@redhat.com> References: <20100601205005.GA28322@redhat.com> <20100703040530.GB31255@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20100703040530.GB31255@redhat.com> User-Agent: Mutt/1.5.20 (2009-12-10) X-Scanned-By: MIMEDefang 2.67 on 10.5.11.21 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter.kernel.org [140.211.167.41]); Sat, 03 Jul 2010 04:07:57 +0000 (UTC) diff --git a/drivers/media/IR/Kconfig b/drivers/media/IR/Kconfig index 5a32b99..d8e5c73 100644 --- a/drivers/media/IR/Kconfig +++ b/drivers/media/IR/Kconfig @@ -67,6 +67,16 @@ 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 diff --git a/drivers/media/IR/Makefile b/drivers/media/IR/Makefile index 3ba00bb..2ae4f3a 100644 --- a/drivers/media/IR/Makefile +++ b/drivers/media/IR/Makefile @@ -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 diff --git a/drivers/media/IR/ir-core-priv.h b/drivers/media/IR/ir-core-priv.h index 0a82b22..babd520 100644 --- a/drivers/media/IR/ir-core-priv.h +++ b/drivers/media/IR/ir-core-priv.h @@ -73,6 +73,11 @@ struct ir_raw_event_ctrl { bool first; bool toggle; } jvc; + struct lirc_codec { + struct ir_input_dev *ir_dev; + struct lirc_driver *drv; + int lircdata; + } lirc; }; /* macros for IR decoders */ @@ -164,4 +169,12 @@ 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 */ diff --git a/drivers/media/IR/ir-lirc-codec.c b/drivers/media/IR/ir-lirc-codec.c new file mode 100644 index 0000000..aff31d1 --- /dev/null +++ b/drivers/media/IR/ir-lirc-codec.c @@ -0,0 +1,284 @@ +/* ir-lirc-codec.c - ir-core to classic lirc interface bridge + * + * Copyright (C) 2010 by Jarod Wilson + * + * 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 +#include +#include +#include +#include "ir-core-priv.h" +#include "lirc_dev.h" + +#define LIRCBUF_SIZE 256 + +/** + * 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 ir_input_dev *ir_dev = input_get_drvdata(input_dev); + + if (!(ir_dev->raw->enabled_protocols & IR_TYPE_LIRC)) + return 0; + + if (!ir_dev->raw->lirc.drv || !ir_dev->raw->lirc.drv->rbuf) + return -EINVAL; + + IR_dprintk(2, "LIRC data transfer started (%uus %s)\n", + TO_US(ev.duration), TO_STR(ev.pulse)); + + ir_dev->raw->lirc.lircdata += ev.duration / 1000; + if (ev.pulse) + ir_dev->raw->lirc.lircdata |= PULSE_BIT; + + lirc_buffer_write(ir_dev->raw->lirc.drv->rbuf, + (unsigned char *) &ir_dev->raw->lirc.lircdata); + wake_up(&ir_dev->raw->lirc.drv->rbuf->wait_poll); + + ir_dev->raw->lirc.lircdata = 0; + + return 0; +} + +static ssize_t ir_lirc_transmit_ir(struct file *file, const char *buf, + size_t n, loff_t *ppos) +{ + struct lirc_codec *lirc; + struct ir_input_dev *ir_dev; + int *txbuf; /* buffer with values to transmit */ + int ret = 0, count; + + lirc = lirc_get_pdata(file); + if (!lirc) + return -EFAULT; + + if (n % sizeof(int)) + return -EINVAL; + + count = n / sizeof(int); + if (count > LIRCBUF_SIZE || count % 2 == 0) + return -EINVAL; + + txbuf = kzalloc(sizeof(int) * LIRCBUF_SIZE, GFP_KERNEL); + if (!txbuf) + return -ENOMEM; + + if (copy_from_user(txbuf, buf, n)) { + ret = -EFAULT; + goto out; + } + + ir_dev = lirc->ir_dev; + if (!ir_dev) { + ret = -EFAULT; + goto out; + } + + if (ir_dev->props && ir_dev->props->tx_ir) + ret = ir_dev->props->tx_ir(ir_dev->props->priv, txbuf, (u32)n); + +out: + kfree(txbuf); + return ret; +} + +static int ir_lirc_ioctl(struct inode *node, struct file *filep, + unsigned int cmd, unsigned long arg) +{ + struct lirc_codec *lirc; + struct ir_input_dev *ir_dev; + int ret = 0; + void *drv_data; + unsigned long val; + + lirc = lirc_get_pdata(filep); + if (!lirc) + return -EFAULT; + + ir_dev = lirc->ir_dev; + if (!ir_dev || !ir_dev->props || !ir_dev->props->priv) + return -EFAULT; + + drv_data = ir_dev->props->priv; + + switch (cmd) { + case LIRC_SET_TRANSMITTER_MASK: + ret = get_user(val, (unsigned long *)arg); + if (ret) + return ret; + + if (ir_dev->props && ir_dev->props->s_tx_mask) + ret = ir_dev->props->s_tx_mask(drv_data, (u32)val); + else + return -EINVAL; + break; + + case LIRC_SET_SEND_CARRIER: + ret = get_user(val, (unsigned long *)arg); + if (ret) + return ret; + + if (ir_dev->props && ir_dev->props->s_tx_carrier) + ir_dev->props->s_tx_carrier(drv_data, (u32)val); + else + return -EINVAL; + break; + + case LIRC_GET_SEND_MODE: + val = LIRC_CAN_SEND_PULSE & LIRC_CAN_SEND_MASK; + ret = put_user(val, (unsigned long *)arg); + break; + + case LIRC_SET_SEND_MODE: + ret = get_user(val, (unsigned long *)arg); + if (ret) + return ret; + + if (val != (LIRC_MODE_PULSE & LIRC_CAN_SEND_MASK)) + return -EINVAL; + break; + + default: + return lirc_dev_fop_ioctl(node, filep, cmd, arg); + } + + return ret; +} + +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 = ir_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 lirc_driver *drv; + struct lirc_buffer *rbuf; + int rc = -ENOMEM; + unsigned long features; + + drv = kzalloc(sizeof(struct lirc_driver), GFP_KERNEL); + if (!drv) + return rc; + + 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; + + features = LIRC_CAN_REC_MODE2; + if (ir_dev->props->tx_ir) { + features |= LIRC_CAN_SEND_PULSE; + if (ir_dev->props->s_tx_mask) + features |= LIRC_CAN_SET_TRANSMITTER_MASK; + if (ir_dev->props->s_tx_carrier) + features |= LIRC_CAN_SET_SEND_CARRIER; + } + + snprintf(drv->name, sizeof(drv->name), "ir-lirc-codec (%s)", + ir_dev->driver_name); + drv->minor = -1; + drv->features = features; + drv->data = &ir_dev->raw->lirc; + 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; + } + + ir_dev->raw->lirc.drv = drv; + ir_dev->raw->lirc.ir_dev = ir_dev; + ir_dev->raw->lirc.lircdata = PULSE_MASK; + + return 0; + +lirc_register_failed: +rbuf_init_failed: + kfree(rbuf); +rbuf_alloc_failed: + kfree(drv); + + return rc; +} + +static int ir_lirc_unregister(struct input_dev *input_dev) +{ + struct ir_input_dev *ir_dev = input_get_drvdata(input_dev); + struct lirc_codec *lirc = &ir_dev->raw->lirc; + + lirc_unregister_driver(lirc->drv->minor); + lirc_buffer_free(lirc->drv->rbuf); + kfree(lirc->drv); + + return 0; +} + +static struct ir_raw_handler lirc_handler = { + .protocols = IR_TYPE_LIRC, + .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 "); +MODULE_AUTHOR("Red Hat Inc. (http://www.redhat.com)"); +MODULE_DESCRIPTION("LIRC IR handler bridge"); diff --git a/drivers/media/IR/ir-raw-event.c b/drivers/media/IR/ir-raw-event.c index 5f98ab8..6f192ef 100644 --- a/drivers/media/IR/ir-raw-event.c +++ b/drivers/media/IR/ir-raw-event.c @@ -253,6 +253,7 @@ 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 diff --git a/drivers/media/IR/ir-sysfs.c b/drivers/media/IR/ir-sysfs.c index f73e4a6..a841e51 100644 --- a/drivers/media/IR/ir-sysfs.c +++ b/drivers/media/IR/ir-sysfs.c @@ -93,6 +93,11 @@ static ssize_t show_protocols(struct device *d, else if (allowed & IR_TYPE_SONY) tmp += sprintf(tmp, "sony "); + if (allowed & enabled & IR_TYPE_LIRC) + tmp += sprintf(tmp, "[lirc] "); + else if (allowed & IR_TYPE_LIRC) + tmp += sprintf(tmp, "lirc "); + if (tmp != buf) tmp--; *tmp = '\n'; @@ -160,6 +165,9 @@ static ssize_t store_protocols(struct device *d, } else if (!strncasecmp(tmp, "sony", 4)) { tmp += 4; mask = IR_TYPE_SONY; + } else if (!strncasecmp(tmp, "lirc", 4)) { + tmp += 4; + mask = IR_TYPE_LIRC; } else { IR_dprintk(1, "Unknown protocol\n"); return -EINVAL; diff --git a/include/media/rc-map.h b/include/media/rc-map.h index 7abe12e..63b35e4 100644 --- a/include/media/rc-map.h +++ b/include/media/rc-map.h @@ -17,10 +17,12 @@ #define IR_TYPE_RC6 (1 << 2) /* Philips RC6 protocol */ #define IR_TYPE_JVC (1 << 3) /* JVC protocol */ #define IR_TYPE_SONY (1 << 4) /* Sony12/15/20 protocol */ +#define IR_TYPE_LIRC (1 << 30) /* Pass raw IR to lirc userspace */ #define IR_TYPE_OTHER (1u << 31) #define IR_TYPE_ALL (IR_TYPE_RC5 | IR_TYPE_NEC | IR_TYPE_RC6 | \ - IR_TYPE_JVC | IR_TYPE_SONY | IR_TYPE_OTHER) + IR_TYPE_JVC | IR_TYPE_SONY | IR_TYPE_LIRC | \ + IR_TYPE_OTHER) struct ir_scancode { u32 scancode;