From patchwork Thu Apr 8 23:04:30 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?RGF2aWQgSMODwqRyZGVtYW4=?= X-Patchwork-Id: 91551 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.3/8.14.3) with ESMTP id o38N4kJd011453 for ; Thu, 8 Apr 2010 23:04:47 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933841Ab0DHXEg (ORCPT ); Thu, 8 Apr 2010 19:04:36 -0400 Received: from 1-1-12-13a.han.sth.bostream.se ([82.182.30.168]:45504 "EHLO palpatine.hardeman.nu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933780Ab0DHXEf (ORCPT ); Thu, 8 Apr 2010 19:04:35 -0400 Received: from basil.haag.hardeman.nu (host-88-217-225-61.customer.m-online.net [88.217.225.61]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "basil.haag.hardeman.nu", Issuer "hardeman.nu CA" (verified OK)) by palpatine.hardeman.nu (Postfix) with ESMTPSA id 368CE150A; Fri, 9 Apr 2010 01:04:33 +0200 (CEST) Received: by basil.haag.hardeman.nu (Postfix, from userid 1000) id A77281A00A5; Fri, 9 Apr 2010 01:04:30 +0200 (CEST) Subject: [PATCH 2/4] Add RC5x support to ir-core To: mchehab@redhat.com From: David =?utf-8?b?SMOkcmRlbWFu?= Cc: linux-input@vger.kernel.org, linux-media@vger.kernel.org Date: Fri, 09 Apr 2010 01:04:30 +0200 Message-ID: <20100408230430.14453.74921.stgit@localhost.localdomain> In-Reply-To: <20100408230246.14453.97377.stgit@localhost.localdomain> References: <20100408230246.14453.97377.stgit@localhost.localdomain> User-Agent: StGit/0.15 MIME-Version: 1.0 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@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]); Thu, 08 Apr 2010 23:04:47 +0000 (UTC) diff --git a/drivers/media/IR/ir-rc5-decoder.c b/drivers/media/IR/ir-rc5-decoder.c index 59bcaa9..c970ab2 100644 --- a/drivers/media/IR/ir-rc5-decoder.c +++ b/drivers/media/IR/ir-rc5-decoder.c @@ -1,4 +1,4 @@ -/* ir-rc5-decoder.c - handle RC-5 IR Pulse/Space protocol +/* ir-rc5-decoder.c - handle RC5(x) IR Pulse/Space protocol * * Copyright (C) 2010 by Mauro Carvalho Chehab * @@ -13,15 +13,19 @@ */ /* - * This code only handles 14 bits RC-5 protocols. There are other variants - * that use a different number of bits. This is currently unsupported - * It considers a carrier of 36 kHz, with a total of 14 bits, where + * This code handles 14 bits RC5 protocols and 20 bits RC5x protocols. + * There are other variants that use a different number of bits. + * This is currently unsupported. + * It considers a carrier of 36 kHz, with a total of 14/20 bits, where * the first two bits are start bits, and a third one is a filing bit */ #include "ir-core-priv.h" #define RC5_NBITS 14 +#define RC5X_NBITS 20 +#define CHECK_RC5X_NBITS 8 +#define RC5X_SPACE SPACE(4) #define RC5_UNIT 888888 /* ns */ /* Used to register rc5_decoder clients */ @@ -32,6 +36,7 @@ enum rc5_state { STATE_INACTIVE, STATE_BIT_START, STATE_BIT_END, + STATE_CHECK_RC5X, STATE_FINISHED, }; @@ -45,6 +50,7 @@ struct decoder_data { u32 rc5_bits; int last_unit; unsigned count; + unsigned wanted_bits; }; @@ -126,7 +132,7 @@ static int ir_rc5_decode(struct input_dev *input_dev, s64 duration) { struct decoder_data *data; struct ir_input_dev *ir_dev = input_get_drvdata(input_dev); - u8 command, system, toggle; + u8 toggle; u32 scancode; int u; @@ -147,7 +153,7 @@ static int ir_rc5_decode(struct input_dev *input_dev, s64 duration) goto out; again: - IR_dprintk(2, "RC5 decode started at state %i (%i units, %ius)\n", + IR_dprintk(2, "RC5(x) decode started at state %i (%i units, %ius)\n", data->state, u, TO_US(duration)); if (DURATION(u) == 0 && data->state != STATE_FINISHED) @@ -159,6 +165,8 @@ again: if (IS_PULSE(u)) { data->state = STATE_BIT_START; data->count = 1; + /* We just need enough bits to get to STATE_CHECK_RC5X */ + data->wanted_bits = RC5X_NBITS; DECREASE_DURATION(u, 1); goto again; } @@ -176,7 +184,7 @@ again: * If the last bit is zero, a space will merge * with the silence after the command. */ - if (IS_PULSE(u) && data->count == RC5_NBITS) { + if (IS_PULSE(u) && data->count == data->wanted_bits) { data->state = STATE_FINISHED; goto again; } @@ -188,8 +196,10 @@ again: case STATE_BIT_END: if (IS_TRANSITION(u, data->last_unit)) { - if (data->count == RC5_NBITS) + if (data->count == data->wanted_bits) data->state = STATE_FINISHED; + else if (data->count == CHECK_RC5X_NBITS) + data->state = STATE_CHECK_RC5X; else data->state = STATE_BIT_START; @@ -198,22 +208,52 @@ again: } break; + case STATE_CHECK_RC5X: + if (IS_SPACE(u) && DURATION(u) >= DURATION(RC5X_SPACE)) { + /* RC5X */ + data->wanted_bits = RC5X_NBITS; + DECREASE_DURATION(u, DURATION(RC5X_SPACE)); + } else { + /* RC5 */ + data->wanted_bits = RC5_NBITS; + } + data->state = STATE_BIT_START; + goto again; + case STATE_FINISHED: - command = (data->rc5_bits & 0x0003F) >> 0; - system = (data->rc5_bits & 0x007C0) >> 6; - toggle = (data->rc5_bits & 0x00800) ? 1 : 0; - command += (data->rc5_bits & 0x01000) ? 0 : 0x40; - scancode = system << 8 | command; - - IR_dprintk(1, "RC5 scancode 0x%04x (toggle: %u)\n", - scancode, toggle); + if (data->wanted_bits == RC5X_NBITS) { + /* RC5X */ + u8 xdata, command, system; + xdata = (data->rc5_bits & 0x0003F) >> 0; + command = (data->rc5_bits & 0x00FC0) >> 6; + system = (data->rc5_bits & 0x1F000) >> 12; + toggle = (data->rc5_bits & 0x20000) ? 1 : 0; + command += (data->rc5_bits & 0x01000) ? 0 : 0x40; + scancode = system << 16 | command << 8 | xdata; + + IR_dprintk(1, "RC5X scancode 0x%06x (toggle: %u)\n", + scancode, toggle); + + } else { + /* RC5 */ + u8 command, system; + command = (data->rc5_bits & 0x0003F) >> 0; + system = (data->rc5_bits & 0x007C0) >> 6; + toggle = (data->rc5_bits & 0x00800) ? 1 : 0; + command += (data->rc5_bits & 0x01000) ? 0 : 0x40; + scancode = system << 8 | command; + + IR_dprintk(1, "RC5 scancode 0x%04x (toggle: %u)\n", + scancode, toggle); + } + ir_keydown(input_dev, scancode, toggle); data->state = STATE_INACTIVE; return 0; } out: - IR_dprintk(1, "RC5 decode failed at state %i (%i units, %ius)\n", + IR_dprintk(1, "RC5(x) decode failed at state %i (%i units, %ius)\n", data->state, u, TO_US(duration)); data->state = STATE_INACTIVE; return -EINVAL; @@ -273,7 +313,7 @@ static int __init ir_rc5_decode_init(void) { ir_raw_handler_register(&rc5_handler); - printk(KERN_INFO "IR RC-5 protocol handler initialized\n"); + printk(KERN_INFO "IR RC5(x) protocol handler initialized\n"); return 0; } @@ -288,4 +328,4 @@ module_exit(ir_rc5_decode_exit); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Mauro Carvalho Chehab "); MODULE_AUTHOR("Red Hat Inc. (http://www.redhat.com)"); -MODULE_DESCRIPTION("RC-5 IR protocol decoder"); +MODULE_DESCRIPTION("RC5(x) IR protocol decoder");