From patchwork Mon Jan 20 19:39:47 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?QW50dGkgU2VwcMOkbMOk?= X-Patchwork-Id: 3514311 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 3BF9A9F38B for ; Mon, 20 Jan 2014 19:40:21 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 5377C20142 for ; Mon, 20 Jan 2014 19:40:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6DD4B20145 for ; Mon, 20 Jan 2014 19:40:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752706AbaATTkR (ORCPT ); Mon, 20 Jan 2014 14:40:17 -0500 Received: from mail-la0-f41.google.com ([209.85.215.41]:56033 "EHLO mail-la0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752677AbaATTkO (ORCPT ); Mon, 20 Jan 2014 14:40:14 -0500 Received: by mail-la0-f41.google.com with SMTP id mc6so5997238lab.28 for ; Mon, 20 Jan 2014 11:40:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-type:content-transfer-encoding; bh=lwBLzpWfR5mlix2Z6Ci9SLHCr5xZjlZn6RNFmBUk/Mc=; b=eeekyxve2JlCf/qdApyqQ954mY7gCX6Zbc8fBzbcg9GcA8aorQvggic2XAPlb+lR+H w6ehytnIsRDdxqskJZWLphBfejkisBDDFX6GLfTEuYjLeZLP657W16G3cd90+iswFd6t UV8dXuiUhxm/MM8ZBCccs1LZO6dnpuuMei4IuF//KpW4kNagG2EKy0WicQNIGA9hPu/b IZZDCE8IQn2IOgFsdsAYbeKi4XgjXgQw27YCBerf5FTDKRZjuDQtuLYgFXpRMtiWq8SW cLN8YeIjpCVdgkVe/dEg+0zqq5SE7hXf6l/rt+JZqNkRSDGIsD3PmVLlrE3p6rgt/iix Yj7g== X-Received: by 10.112.172.69 with SMTP id ba5mr2163555lbc.55.1390246813390; Mon, 20 Jan 2014 11:40:13 -0800 (PST) Received: from pixie.elisa-laajakaista.fi (a88-114-92-24.elisa-laajakaista.fi. [88.114.92.24]) by mx.google.com with ESMTPSA id np10sm1681402lbb.7.2014.01.20.11.40.11 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 20 Jan 2014 11:40:12 -0800 (PST) From: =?UTF-8?q?Antti=20Sepp=C3=A4l=C3=A4?= To: Mauro Carvalho Chehab Cc: linux-media@vger.kernel.org, =?UTF-8?q?Antti=20Sepp=C3=A4l=C3=A4?= Subject: [RFC PATCH 4/4] nuvoton-cir: Add support for reading/writing wakeup scancodes via sysfs Date: Mon, 20 Jan 2014 21:39:47 +0200 Message-Id: <1390246787-15616-5-git-send-email-a.seppala@gmail.com> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1390246787-15616-1-git-send-email-a.seppala@gmail.com> References: <20140115173559.7e53239a@samsung.com> <1390246787-15616-1-git-send-email-a.seppala@gmail.com> MIME-Version: 1.0 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Spam-Status: No, score=-7.3 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, T_DKIM_INVALID, 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 This patch adds support for reading/writing wakeup scancodes via sysfs to nuvoton-cir hardware. Signed-off-by: Antti Seppälä --- drivers/media/rc/nuvoton-cir.c | 81 ++++++++++++++++++++++++++++++++++++++++++ drivers/media/rc/nuvoton-cir.h | 2 ++ 2 files changed, 83 insertions(+) diff --git a/drivers/media/rc/nuvoton-cir.c b/drivers/media/rc/nuvoton-cir.c index 21ee0dc..c1b0cf2 100644 --- a/drivers/media/rc/nuvoton-cir.c +++ b/drivers/media/rc/nuvoton-cir.c @@ -531,6 +531,86 @@ static int nvt_set_tx_carrier(struct rc_dev *dev, u32 carrier) return 0; } +static int nvt_wakeup_scancodes(struct rc_dev *dev, + struct list_head *scancode_list, int write) +{ + int i = 0; + u8 cnt, reg, reg_learn_mode; + unsigned long flags; + struct rc_wakeup_scancode *scancode; + struct nvt_dev *nvt = dev->priv; + + if (write) { + nvt_dbg_wake("%s firing, write", __func__); + + reg = nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRCON); + reg_learn_mode = reg & ~CIR_WAKE_IRCON_MODE0; + reg_learn_mode |= CIR_WAKE_IRCON_MODE1; + + /* Lock the learn area to prevent racing with wake-isr */ + spin_lock_irqsave(&nvt->nvt_lock, flags); + + /* Enable fifo writes */ + nvt_cir_wake_reg_write(nvt, reg_learn_mode, CIR_WAKE_IRCON); + + /* Clear cir wake rx fifo */ + nvt_clear_cir_wake_fifo(nvt); + + /* Write wake samples to fifo */ + list_for_each_entry_reverse(scancode, scancode_list, + list_item) { + /* Prevent writing too many codes */ + if (++i > WAKE_FIFO_LEN) + break; + nvt_cir_wake_reg_write(nvt, scancode->value, + CIR_WAKE_WR_FIFO_DATA); + } + + /* Switch cir to wakeup mode and disable fifo writing */ + nvt_cir_wake_reg_write(nvt, reg, CIR_WAKE_IRCON); + + /* Set number of bytes needed for wake */ + nvt_cir_wake_reg_write(nvt, i ? i : + CIR_WAKE_FIFO_CMP_BYTES, + CIR_WAKE_FIFO_CMP_DEEP); + + spin_unlock_irqrestore(&nvt->nvt_lock, flags); + + if (i > WAKE_FIFO_LEN) + return -EINVAL; + } else { + nvt_dbg_wake("%s firing, read", __func__); + + /* Scroll to index 0 */ + while (nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY_IDX)) { + nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY); + + /* Stuck index guardian */ + if (++i > 255) { + nvt_dbg_wake("Idx reg is stuck!"); + break; + } + } + + /* Get size of wake fifo and allocate memory for the bytes */ + cnt = nvt_cir_wake_reg_read(nvt, CIR_WAKE_FIFO_COUNT); + + for (i = 0; i < cnt; i++) { + scancode = kmalloc(sizeof(struct rc_wakeup_scancode), + GFP_KERNEL | GFP_ATOMIC); + if (!scancode) + return -ENOMEM; + scancode->value = + nvt_cir_wake_reg_read(nvt, + CIR_WAKE_RD_FIFO_ONLY); + list_add(&scancode->list_item, scancode_list); + } + + return cnt; + } + + return 0; +} /* * nvt_tx_ir * @@ -1047,6 +1127,7 @@ static int nvt_probe(struct pnp_dev *pdev, const struct pnp_device_id *dev_id) rdev->close = nvt_close; rdev->tx_ir = nvt_tx_ir; rdev->s_tx_carrier = nvt_set_tx_carrier; + rdev->s_wakeup_scancodes = nvt_wakeup_scancodes; rdev->input_name = "Nuvoton w836x7hg Infrared Remote Transceiver"; rdev->input_phys = "nuvoton/cir0"; rdev->input_id.bustype = BUS_HOST; diff --git a/drivers/media/rc/nuvoton-cir.h b/drivers/media/rc/nuvoton-cir.h index 07e8310..24ff630 100644 --- a/drivers/media/rc/nuvoton-cir.h +++ b/drivers/media/rc/nuvoton-cir.h @@ -64,6 +64,8 @@ static int debug; #define TX_BUF_LEN 256 #define RX_BUF_LEN 32 +#define WAKE_FIFO_LEN 67 + struct nvt_dev { struct pnp_dev *pdev; struct rc_dev *rdev;