From patchwork Fri Dec 13 15:12:54 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: James Hogan X-Patchwork-Id: 3340961 Return-Path: X-Original-To: patchwork-linux-media@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 9F0A49F243 for ; Fri, 13 Dec 2013 15:16:05 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id D1696201B7 for ; Fri, 13 Dec 2013 15:16:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0AA232022F for ; Fri, 13 Dec 2013 15:15:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753188Ab3LMPPv (ORCPT ); Fri, 13 Dec 2013 10:15:51 -0500 Received: from multi.imgtec.com ([194.200.65.239]:53957 "EHLO multi.imgtec.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753401Ab3LMPO6 (ORCPT ); Fri, 13 Dec 2013 10:14:58 -0500 From: James Hogan To: Mauro Carvalho Chehab , CC: James Hogan Subject: [PATCH 06/11] media: rc: img-ir: add NEC decoder module Date: Fri, 13 Dec 2013 15:12:54 +0000 Message-ID: <1386947579-26703-7-git-send-email-james.hogan@imgtec.com> X-Mailer: git-send-email 1.8.1.2 In-Reply-To: <1386947579-26703-1-git-send-email-james.hogan@imgtec.com> References: <1386947579-26703-1-git-send-email-james.hogan@imgtec.com> MIME-Version: 1.0 X-Originating-IP: [192.168.154.65] X-SEF-Processed: 7_3_0_01192__2013_12_13_15_14_56 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add an img-ir module for decoding the NEC and extended NEC infrared protocols. Signed-off-by: James Hogan Cc: Mauro Carvalho Chehab Cc: linux-media@vger.kernel.org --- drivers/media/rc/img-ir/Kconfig | 7 ++ drivers/media/rc/img-ir/Makefile | 1 + drivers/media/rc/img-ir/img-ir-nec.c | 149 +++++++++++++++++++++++++++++++++++ 3 files changed, 157 insertions(+) create mode 100644 drivers/media/rc/img-ir/img-ir-nec.c diff --git a/drivers/media/rc/img-ir/Kconfig b/drivers/media/rc/img-ir/Kconfig index 60eaba6a0843..44d00227c6c4 100644 --- a/drivers/media/rc/img-ir/Kconfig +++ b/drivers/media/rc/img-ir/Kconfig @@ -24,3 +24,10 @@ config IR_IMG_HW signals in hardware. This is more reliable, consumes less processing power since only a single interrupt is received for each scancode, and allows an IR scancode to be used as a wake event. + +config IR_IMG_NEC + tristate "NEC protocol support" + depends on IR_IMG && IR_IMG_HW + help + Say Y or M here to enable support for the NEC and extended NEC + protocols in the ImgTec infrared decoder block. diff --git a/drivers/media/rc/img-ir/Makefile b/drivers/media/rc/img-ir/Makefile index 4ef86edec873..f3052878f092 100644 --- a/drivers/media/rc/img-ir/Makefile +++ b/drivers/media/rc/img-ir/Makefile @@ -4,3 +4,4 @@ img-ir-$(CONFIG_IR_IMG_HW) += img-ir-hw.o img-ir-objs := $(img-ir-y) obj-$(CONFIG_IR_IMG) += img-ir.o +obj-$(CONFIG_IR_IMG_NEC) += img-ir-nec.o diff --git a/drivers/media/rc/img-ir/img-ir-nec.c b/drivers/media/rc/img-ir/img-ir-nec.c new file mode 100644 index 000000000000..ba376caafaf2 --- /dev/null +++ b/drivers/media/rc/img-ir/img-ir-nec.c @@ -0,0 +1,149 @@ +/* + * ImgTec IR Decoder setup for NEC protocol. + * + * Copyright 2010-2013 Imagination Technologies Ltd. + */ + +#include + +#include "img-ir-hw.h" + +/* Convert NEC data to a scancode */ +static int img_ir_nec_scancode(int len, u64 raw, u64 protocols) +{ + unsigned int addr, addr_inv, data, data_inv; + int scancode; + /* a repeat code has no data */ + if (!len) + return IMG_IR_REPEATCODE; + if (len != 32) + return IMG_IR_ERR_INVALID; + addr = (raw >> 0) & 0xff; + addr_inv = (raw >> 8) & 0xff; + data = (raw >> 16) & 0xff; + data_inv = (raw >> 24) & 0xff; + /* Validate data */ + if ((data_inv ^ data) != 0xff) + return IMG_IR_ERR_INVALID; + + if ((addr_inv ^ addr) != 0xff) { + /* Extended NEC */ + scancode = addr << 16 | + addr_inv << 8 | + data; + } else { + /* Normal NEC */ + scancode = addr << 8 | + data; + } + return scancode; +} + +/* Convert NEC scancode to NEC data filter */ +static int img_ir_nec_filter(const struct img_ir_sc_filter *in, + struct img_ir_filter *out, u64 protocols) +{ + unsigned int addr, addr_inv, data, data_inv; + unsigned int addr_m, addr_inv_m, data_m; + + data = in->data & 0xff; + data_m = in->mask & 0xff; + data_inv = data ^ 0xff; + + if (in->data & 0xff000000) + return -EINVAL; + + if (in->data & 0x00ff0000) { + /* Extended NEC */ + addr = (in->data >> 16) & 0xff; + addr_m = (in->mask >> 16) & 0xff; + addr_inv = (in->data >> 8) & 0xff; + addr_inv_m = (in->mask >> 8) & 0xff; + } else { + /* Normal NEC */ + addr = (in->data >> 8) & 0xff; + addr_m = (in->mask >> 8) & 0xff; + addr_inv = addr ^ 0xff; + addr_inv_m = addr_m; + } + + out->data = data_inv << 24 | + data << 16 | + addr_inv << 8 | + addr; + out->mask = data_m << 24 | + data_m << 16 | + addr_inv_m << 8 | + addr_m; + return 0; +} + +/* + * NEC decoder + * See also http://www.sbprojects.com/knowledge/ir/nec.php + * http://wiki.altium.com/display/ADOH/NEC+Infrared+Transmission+Protocol + */ +static struct img_ir_decoder img_ir_nec = { + .type = RC_BIT_NEC, + .control = { + .decoden = 1, + .code_type = IMG_IR_CODETYPE_PULSEDIST, + }, + /* main timings */ + .unit = 562500, /* 562.5 us */ + .timings = { + /* leader symbol */ + .ldr = { + .pulse = { 16 /* 9ms */ }, + .space = { 8 /* 4.5ms */ }, + }, + /* 0 symbol */ + .s00 = { + .pulse = { 1 /* 562.5 us */ }, + .space = { 1 /* 562.5 us */ }, + }, + /* 1 symbol */ + .s01 = { + .pulse = { 1 /* 562.5 us */ }, + .space = { 3 /* 1687.5 us */ }, + }, + /* free time */ + .ft = { + .minlen = 32, + .maxlen = 32, + .ft_min = 10, /* 5.625 ms */ + }, + }, + /* repeat codes */ + .repeat = 108, /* 108 ms */ + .rtimings = { + /* leader symbol */ + .ldr = { + .space = { 4 /* 2.25 ms */ }, + }, + /* free time */ + .ft = { + .minlen = 0, /* repeat code has no data */ + .maxlen = 0, + }, + }, + /* scancode logic */ + .scancode = img_ir_nec_scancode, + .filter = img_ir_nec_filter, +}; + +static int __init img_ir_nec_init(void) +{ + return img_ir_register_decoder(&img_ir_nec); +} +module_init(img_ir_nec_init); + +static void __exit img_ir_nec_exit(void) +{ + img_ir_unregister_decoder(&img_ir_nec); +} +module_exit(img_ir_nec_exit); + +MODULE_AUTHOR("Imagination Technologies Ltd."); +MODULE_DESCRIPTION("ImgTec IR NEC protocol support"); +MODULE_LICENSE("GPL");