From patchwork Thu Sep 13 19:29:23 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eddie James X-Patchwork-Id: 10599997 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 26DC2112B for ; Thu, 13 Sep 2018 19:29:43 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1580E2B419 for ; Thu, 13 Sep 2018 19:29:43 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 091652B422; Thu, 13 Sep 2018 19:29:43 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E7E0E2B419 for ; Thu, 13 Sep 2018 19:29:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728423AbeINAkd (ORCPT ); Thu, 13 Sep 2018 20:40:33 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:54026 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728321AbeINAkc (ORCPT ); Thu, 13 Sep 2018 20:40:32 -0400 Received: from pps.filterd (m0098396.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w8DJTYwi131551 for ; Thu, 13 Sep 2018 15:29:38 -0400 Received: from e32.co.us.ibm.com (e32.co.us.ibm.com [32.97.110.150]) by mx0a-001b2d01.pphosted.com with ESMTP id 2mfwaf1r58-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Thu, 13 Sep 2018 15:29:38 -0400 Received: from localhost by e32.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 13 Sep 2018 13:29:32 -0600 Received: from b03ledav004.gho.boulder.ibm.com (b03ledav004.gho.boulder.ibm.com [9.17.130.235]) by b03cxnp08026.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w8DJTWZg42270792 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 13 Sep 2018 12:29:32 -0700 Received: from b03ledav004.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0879B7805F; Thu, 13 Sep 2018 13:29:32 -0600 (MDT) Received: from b03ledav004.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4F3FD7805E; Thu, 13 Sep 2018 13:29:30 -0600 (MDT) Received: from oc6728276242.ibm.com (unknown [9.85.164.21]) by b03ledav004.gho.boulder.ibm.com (Postfix) with ESMTP; Thu, 13 Sep 2018 13:29:30 -0600 (MDT) From: Eddie James To: linux-kernel@vger.kernel.org Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, linux-aspeed@lists.ozlabs.org, openbmc@lists.ozlabs.org, robh+dt@kernel.org, mchehab@kernel.org, linux-media@vger.kernel.org, andrew@aj.id.au, joel@jms.id.au, Eddie James Subject: [PATCH v2 1/2] dt-bindings: media: Add Aspeed Video Engine binding documentation Date: Thu, 13 Sep 2018 14:29:23 -0500 X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1536866964-71593-1-git-send-email-eajames@linux.vnet.ibm.com> References: <1536866964-71593-1-git-send-email-eajames@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18091319-0004-0000-0000-000014896B7A X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009715; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000266; SDB=6.01087845; UDB=6.00561774; IPR=6.00867856; MB=3.00023274; MTD=3.00000008; XFM=3.00000015; UTC=2018-09-13 19:29:35 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18091319-0005-0000-0000-000088CCE62F Message-Id: <1536866964-71593-2-git-send-email-eajames@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-09-13_11:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809130196 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Document the bindings. Signed-off-by: Eddie James --- .../devicetree/bindings/media/aspeed-video.txt | 26 ++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 Documentation/devicetree/bindings/media/aspeed-video.txt diff --git a/Documentation/devicetree/bindings/media/aspeed-video.txt b/Documentation/devicetree/bindings/media/aspeed-video.txt new file mode 100644 index 0000000..f1af528 --- /dev/null +++ b/Documentation/devicetree/bindings/media/aspeed-video.txt @@ -0,0 +1,26 @@ +* Device tree bindings for Aspeed Video Engine + +The Video Engine (VE) embedded in the Aspeed AST2400 and AST2500 SOCs can +capture and compress video data from digital or analog sources. + +Required properties: + - compatible: "aspeed,ast2400-video-engine" or + "aspeed,ast2500-video-engine" + - reg: contains the offset and length of the VE memory region + - clocks: clock specifiers for the syscon clocks associated with + the VE (ordering must match the clock-names property) + - clock-names: "vclk" and "eclk" + - resets: reset specifier for the syscon reset associaated with + the VE + - interrupts: the interrupt associated with the VE on this platform + +Example: + +video-engine@1e700000 { + compatible = "aspeed,ast2500-video-engine"; + reg = <0x1e700000 0x20000>; + clocks = <&syscon ASPEED_CLK_GATE_VCLK>, <&syscon ASPEED_CLK_GATE_ECLK>; + clock-names = "vclk", "eclk"; + resets = <&syscon ASPEED_RESET_VIDEO>; + interrupts = <7>; +}; From patchwork Thu Sep 13 19:29:24 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eddie James X-Patchwork-Id: 10599999 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 31D4F112B for ; Thu, 13 Sep 2018 19:29:50 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1C8DD2B419 for ; Thu, 13 Sep 2018 19:29:50 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0FF952B422; Thu, 13 Sep 2018 19:29:50 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5C3E52B41F for ; Thu, 13 Sep 2018 19:29:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728450AbeINAki (ORCPT ); Thu, 13 Sep 2018 20:40:38 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:55050 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728321AbeINAkh (ORCPT ); Thu, 13 Sep 2018 20:40:37 -0400 Received: from pps.filterd (m0098416.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w8DJTPRQ097526 for ; Thu, 13 Sep 2018 15:29:41 -0400 Received: from e34.co.us.ibm.com (e34.co.us.ibm.com [32.97.110.152]) by mx0b-001b2d01.pphosted.com with ESMTP id 2mfw28a7fp-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Thu, 13 Sep 2018 15:29:40 -0400 Received: from localhost by e34.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 13 Sep 2018 13:29:36 -0600 Received: from b03ledav004.gho.boulder.ibm.com (b03ledav004.gho.boulder.ibm.com [9.17.130.235]) by b03cxnp08026.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w8DJTZWG41746510 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Thu, 13 Sep 2018 12:29:35 -0700 Received: from b03ledav004.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 212C57805C; Thu, 13 Sep 2018 13:29:35 -0600 (MDT) Received: from b03ledav004.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4A11D7805F; Thu, 13 Sep 2018 13:29:33 -0600 (MDT) Received: from oc6728276242.ibm.com (unknown [9.85.164.21]) by b03ledav004.gho.boulder.ibm.com (Postfix) with ESMTP; Thu, 13 Sep 2018 13:29:33 -0600 (MDT) From: Eddie James To: linux-kernel@vger.kernel.org Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, linux-aspeed@lists.ozlabs.org, openbmc@lists.ozlabs.org, robh+dt@kernel.org, mchehab@kernel.org, linux-media@vger.kernel.org, andrew@aj.id.au, joel@jms.id.au, Eddie James Subject: [PATCH v2 2/2] media: platform: Add Aspeed Video Engine driver Date: Thu, 13 Sep 2018 14:29:24 -0500 X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1536866964-71593-1-git-send-email-eajames@linux.vnet.ibm.com> References: <1536866964-71593-1-git-send-email-eajames@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18091319-0016-0000-0000-0000092D1F0D X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00009715; HX=3.00000242; KW=3.00000007; PH=3.00000004; SC=3.00000266; SDB=6.01087845; UDB=6.00561774; IPR=6.00867856; MB=3.00023274; MTD=3.00000008; XFM=3.00000015; UTC=2018-09-13 19:29:39 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18091319-0017-0000-0000-000040576309 Message-Id: <1536866964-71593-3-git-send-email-eajames@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-09-13_11:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=13 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1809130196 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The Video Engine (VE) embedded in the Aspeed AST2400 and AST2500 SOCs can capture and compress video data from digital or analog sources. With the Aspeed chip acting a service processor, the Video Engine can capture the host processor graphics output. Add a V4L2 driver to capture video data and compress it to JPEG images, making the data available through a standard read interface. Signed-off-by: Eddie James --- MAINTAINERS | 8 + drivers/media/platform/Kconfig | 8 + drivers/media/platform/Makefile | 1 + drivers/media/platform/aspeed-video.c | 1469 +++++++++++++++++++++++++++++++++ 4 files changed, 1486 insertions(+) create mode 100644 drivers/media/platform/aspeed-video.c diff --git a/MAINTAINERS b/MAINTAINERS index 389fb2e..d8352ad 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2356,6 +2356,14 @@ S: Maintained F: Documentation/hwmon/asc7621 F: drivers/hwmon/asc7621.c +ASPEED VIDEO ENGINE DRIVER +M: Eddie James +L: linux-media@vger.kernel.org +L: openbmc@lists.ozlabs.org (moderated for non-subscribers) +S: Maintained +F: drivers/media/platform/aspeed-video.c +F: Documentation/devicetree/bindings/media/aspeed-video.txt + ASUS NOTEBOOKS AND EEEPC ACPI/WMI EXTRAS DRIVERS M: Corentin Chary L: acpi4asus-user@lists.sourceforge.net diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig index f627587..5cce385 100644 --- a/drivers/media/platform/Kconfig +++ b/drivers/media/platform/Kconfig @@ -32,6 +32,14 @@ source "drivers/media/platform/davinci/Kconfig" source "drivers/media/platform/omap/Kconfig" +config VIDEO_ASPEED + tristate "Aspeed AST2400 and AST2500 Video Engine driver" + depends on VIDEO_V4L2 + help + Support for the Aspeed Video Engine (VE) embedded in the Aspeed + AST2400 and AST2500 SOCs. The VE can capture and compress video data + from digital or analog sources. + config VIDEO_SH_VOU tristate "SuperH VOU video output driver" depends on MEDIA_CAMERA_SUPPORT diff --git a/drivers/media/platform/Makefile b/drivers/media/platform/Makefile index 6ab6200..2973953 100644 --- a/drivers/media/platform/Makefile +++ b/drivers/media/platform/Makefile @@ -3,6 +3,7 @@ # Makefile for the video capture/playback device drivers. # +obj-$(CONFIG_VIDEO_ASPEED) += aspeed-video.o obj-$(CONFIG_VIDEO_CADENCE) += cadence/ obj-$(CONFIG_VIDEO_VIA_CAMERA) += via-camera.o obj-$(CONFIG_VIDEO_CAFE_CCIC) += marvell-ccic/ diff --git a/drivers/media/platform/aspeed-video.c b/drivers/media/platform/aspeed-video.c new file mode 100644 index 0000000..4f55c2e --- /dev/null +++ b/drivers/media/platform/aspeed-video.c @@ -0,0 +1,1469 @@ +// SPDX-License-Identifier: GPL-2.0+ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define DEVICE_NAME "aspeed-video" + +#define ASPEED_VIDEO_JPEG_NUM_QUALITIES 12 +#define ASPEED_VIDEO_JPEG_HEADER_SIZE 10 +#define ASPEED_VIDEO_JPEG_QUANT_SIZE 116 +#define ASPEED_VIDEO_JPEG_DCT_SIZE 34 + +#define MAX_FRAME_RATE 60 +#define NUM_POLARITY_CHECKS 10 +#define INVALID_RESOLUTION_RETRIES 1 +#define INVALID_RESOLUTION_DELAY msecs_to_jiffies(250) +#define RESOLUTION_CHANGE_DELAY msecs_to_jiffies(500) +#define MODE_DETECT_TIMEOUT msecs_to_jiffies(500) +#define DIRECT_FETCH_THRESHOLD 0x0c0000 /* 1024 * 768, 32bpp */ + +#define VE_SRC_BUFFER_SIZE 0x900000 /* 1920 * 1200, 32bpp */ +#define VE_COMP_BUFFER_SIZE 0x100000 /* 128K packet * 8 packets */ +#define VE_JPEG_BUFFER_SIZE 0x006000 /* 512 * 12 * 4 */ + +#define VE_PROTECTION_KEY 0x000 +#define VE_PROTECTION_KEY_UNLOCK 0x1A038AA8 + +#define VE_SEQ_CTRL 0x004 +#define VE_SEQ_CTRL_TRIG_MODE_DET BIT(0) +#define VE_SEQ_CTRL_TRIG_CAPTURE BIT(1) +#define VE_SEQ_CTRL_FORCE_IDLE BIT(2) +#define VE_SEQ_CTRL_MULT_FRAME BIT(3) +#define VE_SEQ_CTRL_TRIG_COMP BIT(4) +#define VE_SEQ_CTRL_AUTO_COMP BIT(5) +#define VE_SEQ_CTRL_EN_WATCHDOG BIT(7) +#define VE_SEQ_CTRL_YUV420 BIT(10) +#define VE_SEQ_CTRL_COMP_FMT GENMASK(11, 10) +#define VE_SEQ_CTRL_HALT BIT(12) +#define VE_SEQ_CTRL_EN_WATCHDOG_COMP BIT(14) +#define VE_SEQ_CTRL_TRIG_JPG BIT(15) +#define VE_SEQ_CTRL_CAP_BUSY BIT(16) +#define VE_SEQ_CTRL_COMP_BUSY BIT(18) + +#ifdef CONFIG_MACH_ASPEED_G5 +#define VE_SEQ_CTRL_JPEG_MODE BIT(13) /* AST2500 */ +#else +#define VE_SEQ_CTRL_JPEG_MODE BIT(8) /* AST2400 */ +#endif /* CONFIG_MACH_ASPEED_G5 */ + +#define VE_CTRL 0x008 +#define VE_CTRL_HSYNC_POL BIT(0) +#define VE_CTRL_VSYNC_POL BIT(1) +#define VE_CTRL_SOURCE BIT(2) +#define VE_CTRL_INT_DE BIT(4) +#define VE_CTRL_DIRECT_FETCH BIT(5) +#define VE_CTRL_YUV BIT(6) +#define VE_CTRL_RGB BIT(7) +#define VE_CTRL_CAPTURE_FMT GENMASK(7, 6) +#define VE_CTRL_AUTO_OR_CURSOR BIT(8) +#define VE_CTRL_CLK_INVERSE BIT(11) +#define VE_CTRL_CLK_DELAY GENMASK(11, 9) +#define VE_CTRL_INTERLACE BIT(14) +#define VE_CTRL_HSYNC_POL_CTRL BIT(15) +#define VE_CTRL_FRC GENMASK(23, 16) + +#define VE_TGS_0 0x00c +#define VE_TGS_1 0x010 +#define VE_TGS_FIRST GENMASK(28, 16) +#define VE_TGS_LAST GENMASK(12, 0) + +#define VE_SCALING_FACTOR 0x014 +#define VE_SCALING_FILTER0 0x018 +#define VE_SCALING_FILTER1 0x01c +#define VE_SCALING_FILTER2 0x020 +#define VE_SCALING_FILTER3 0x024 + +#define VE_CAP_WINDOW 0x030 +#define VE_COMP_WINDOW 0x034 +#define VE_COMP_PROC_OFFSET 0x038 +#define VE_COMP_OFFSET 0x03c +#define VE_JPEG_ADDR 0x040 +#define VE_SRC0_ADDR 0x044 +#define VE_SRC_SCANLINE_OFFSET 0x048 +#define VE_SRC1_ADDR 0x04c +#define VE_COMP_ADDR 0x054 + +#define VE_STREAM_BUF_SIZE 0x058 +#define VE_STREAM_BUF_SIZE_N_PACKETS GENMASK(5, 3) +#define VE_STREAM_BUF_SIZE_P_SIZE GENMASK(2, 0) + +#define VE_COMP_CTRL 0x060 +#define VE_COMP_CTRL_VQ_DCT_ONLY BIT(0) +#define VE_COMP_CTRL_VQ_4COLOR BIT(1) +#define VE_COMP_CTRL_QUANTIZE BIT(2) +#define VE_COMP_CTRL_EN_BQ BIT(4) +#define VE_COMP_CTRL_EN_CRYPTO BIT(5) +#define VE_COMP_CTRL_DCT_CHR GENMASK(10, 6) +#define VE_COMP_CTRL_DCT_LUM GENMASK(15, 11) +#define VE_COMP_CTRL_EN_HQ BIT(16) +#define VE_COMP_CTRL_RSVD BIT(19) +#define VE_COMP_CTRL_ENCODE GENMASK(21, 20) +#define VE_COMP_CTRL_HQ_DCT_CHR GENMASK(26, 22) +#define VE_COMP_CTRL_HQ_DCT_LUM GENMASK(31, 27) + +#define VE_OFFSET_COMP_STREAM 0x078 + +#define VE_SRC_LR_EDGE_DET 0x090 +#define VE_SRC_LR_EDGE_DET_LEFT GENMASK(11, 0) +#define VE_SRC_LR_EDGE_DET_NO_V BIT(12) +#define VE_SRC_LR_EDGE_DET_NO_H BIT(13) +#define VE_SRC_LR_EDGE_DET_NO_DISP BIT(14) +#define VE_SRC_LR_EDGE_DET_NO_CLK BIT(15) +#define VE_SRC_LR_EDGE_DET_RT_SHF 16 +#define VE_SRC_LR_EDGE_DET_RT GENMASK(27, VE_SRC_LR_EDGE_DET_RT_SHF) +#define VE_SRC_LR_EDGE_DET_INTERLACE BIT(31) + +#define VE_SRC_TB_EDGE_DET 0x094 +#define VE_SRC_TB_EDGE_DET_TOP GENMASK(12, 0) +#define VE_SRC_TB_EDGE_DET_BOT_SHF 16 +#define VE_SRC_TB_EDGE_DET_BOT GENMASK(28, VE_SRC_TB_EDGE_DET_BOT_SHF) + +#define VE_MODE_DETECT_STATUS 0x098 +#define VE_MODE_DETECT_STATUS_VSYNC BIT(28) +#define VE_MODE_DETECT_STATUS_HSYNC BIT(29) + +#define VE_INTERRUPT_CTRL 0x304 +#define VE_INTERRUPT_STATUS 0x308 +#define VE_INTERRUPT_MODE_DETECT_WD BIT(0) +#define VE_INTERRUPT_CAPTURE_COMPLETE BIT(1) +#define VE_INTERRUPT_COMP_READY BIT(2) +#define VE_INTERRUPT_COMP_COMPLETE BIT(3) +#define VE_INTERRUPT_MODE_DETECT BIT(4) +#define VE_INTERRUPT_FRAME_COMPLETE BIT(5) +#define VE_INTERRUPT_DECODE_ERR BIT(6) +#define VE_INTERRUPT_HALT_READY BIT(8) +#define VE_INTERRUPT_HANG_WD BIT(9) +#define VE_INTERRUPT_STREAM_DESC BIT(10) +#define VE_INTERRUPT_VSYNC_DESC BIT(11) + +#define VE_MODE_DETECT 0x30c +#define VE_MEM_RESTRICT_START 0x310 +#define VE_MEM_RESTRICT_END 0x314 + +enum { + VIDEO_MODE_DETECT_DONE, + VIDEO_RES_CHANGE, + VIDEO_FRAME_AVAILABLE, + VIDEO_FRAME_TRIGGERED, +}; + +struct aspeed_video_addr { + dma_addr_t dma; + void *virt; +}; + +struct aspeed_video { + void __iomem *base; + struct clk *eclk; + struct clk *vclk; + struct reset_control *rst; + + struct device *dev; + struct v4l2_ctrl_handler v4l2_ctrl; + struct v4l2_device v4l2_dev; + struct v4l2_format v4l2_fmt; + struct video_device vdev; + struct mutex video_lock; + + atomic_t clients; + wait_queue_head_t wait; + struct delayed_work res_work; + unsigned long flags; + + int frame_idx; + u32 frame_size; + + dma_addr_t max; + dma_addr_t min; + struct aspeed_video_addr srcs[2]; + struct aspeed_video_addr comp[2]; + struct aspeed_video_addr jpeg; + + bool yuv420; + int frame_rate; + int jpeg_quality; + unsigned int height; + unsigned int width; +}; + +#define to_aspeed_video(x) container_of((x), struct aspeed_video, v4l2_dev) + +static const u32 aspeed_video_jpeg_header[ASPEED_VIDEO_JPEG_HEADER_SIZE] = { + 0xE0FFD8FF, 0x464A1000, 0x01004649, 0x60000101, 0x00006000, 0x0F00FEFF, + 0x00002D05, 0x00000000, 0x00000000, 0x00DBFF00 +}; + +static const u32 aspeed_video_jpeg_quant[ASPEED_VIDEO_JPEG_QUANT_SIZE] = { + 0x081100C0, 0x00000000, 0x00110103, 0x03011102, 0xC4FF0111, 0x00001F00, + 0x01010501, 0x01010101, 0x00000000, 0x00000000, 0x04030201, 0x08070605, + 0xFF0B0A09, 0x10B500C4, 0x03010200, 0x03040203, 0x04040505, 0x7D010000, + 0x00030201, 0x12051104, 0x06413121, 0x07615113, 0x32147122, 0x08A19181, + 0xC1B14223, 0xF0D15215, 0x72623324, 0x160A0982, 0x1A191817, 0x28272625, + 0x35342A29, 0x39383736, 0x4544433A, 0x49484746, 0x5554534A, 0x59585756, + 0x6564635A, 0x69686766, 0x7574736A, 0x79787776, 0x8584837A, 0x89888786, + 0x9493928A, 0x98979695, 0xA3A29A99, 0xA7A6A5A4, 0xB2AAA9A8, 0xB6B5B4B3, + 0xBAB9B8B7, 0xC5C4C3C2, 0xC9C8C7C6, 0xD4D3D2CA, 0xD8D7D6D5, 0xE2E1DAD9, + 0xE6E5E4E3, 0xEAE9E8E7, 0xF4F3F2F1, 0xF8F7F6F5, 0xC4FFFAF9, 0x00011F00, + 0x01010103, 0x01010101, 0x00000101, 0x00000000, 0x04030201, 0x08070605, + 0xFF0B0A09, 0x11B500C4, 0x02010200, 0x04030404, 0x04040507, 0x77020100, + 0x03020100, 0x21050411, 0x41120631, 0x71610751, 0x81322213, 0x91421408, + 0x09C1B1A1, 0xF0523323, 0xD1726215, 0x3424160A, 0x17F125E1, 0x261A1918, + 0x2A292827, 0x38373635, 0x44433A39, 0x48474645, 0x54534A49, 0x58575655, + 0x64635A59, 0x68676665, 0x74736A69, 0x78777675, 0x83827A79, 0x87868584, + 0x928A8988, 0x96959493, 0x9A999897, 0xA5A4A3A2, 0xA9A8A7A6, 0xB4B3B2AA, + 0xB8B7B6B5, 0xC3C2BAB9, 0xC7C6C5C4, 0xD2CAC9C8, 0xD6D5D4D3, 0xDAD9D8D7, + 0xE5E4E3E2, 0xE9E8E7E6, 0xF4F3F2EA, 0xF8F7F6F5, 0xDAFFFAF9, 0x01030C00, + 0x03110200, 0x003F0011 +}; + +static const u32 aspeed_video_jpeg_dct[ASPEED_VIDEO_JPEG_NUM_QUALITIES] + [ASPEED_VIDEO_JPEG_DCT_SIZE] = { + { 0x0D140043, 0x0C0F110F, 0x11101114, 0x17141516, 0x1E20321E, + 0x3D1E1B1B, 0x32242E2B, 0x4B4C3F48, 0x44463F47, 0x61735A50, + 0x566C5550, 0x88644644, 0x7A766C65, 0x4D808280, 0x8C978D60, + 0x7E73967D, 0xDBFF7B80, 0x1F014300, 0x272D2121, 0x3030582D, + 0x697BB958, 0xB8B9B97B, 0xB9B8A6A6, 0xB9B9B9B9, 0xB9B9B9B9, + 0xB9B9B9B9, 0xB9B9B9B9, 0xB9B9B9B9, 0xB9B9B9B9, 0xB9B9B9B9, + 0xB9B9B9B9, 0xB9B9B9B9, 0xB9B9B9B9, 0xFFB9B9B9 }, + { 0x0C110043, 0x0A0D0F0D, 0x0F0E0F11, 0x14111213, 0x1A1C2B1A, + 0x351A1818, 0x2B1F2826, 0x4142373F, 0x3C3D373E, 0x55644E46, + 0x4B5F4A46, 0x77573D3C, 0x6B675F58, 0x43707170, 0x7A847B54, + 0x6E64836D, 0xDBFF6C70, 0x1B014300, 0x22271D1D, 0x2A2A4C27, + 0x5B6BA04C, 0xA0A0A06B, 0xA0A0A0A0, 0xA0A0A0A0, 0xA0A0A0A0, + 0xA0A0A0A0, 0xA0A0A0A0, 0xA0A0A0A0, 0xA0A0A0A0, 0xA0A0A0A0, + 0xA0A0A0A0, 0xA0A0A0A0, 0xA0A0A0A0, 0xFFA0A0A0 }, + { 0x090E0043, 0x090A0C0A, 0x0C0B0C0E, 0x110E0F10, 0x15172415, + 0x2C151313, 0x241A211F, 0x36372E34, 0x31322E33, 0x4653413A, + 0x3E4E3D3A, 0x62483231, 0x58564E49, 0x385D5E5D, 0x656D6645, + 0x5B536C5A, 0xDBFF595D, 0x16014300, 0x1C201818, 0x22223F20, + 0x4B58853F, 0x85858558, 0x85858585, 0x85858585, 0x85858585, + 0x85858585, 0x85858585, 0x85858585, 0x85858585, 0x85858585, + 0x85858585, 0x85858585, 0x85858585, 0xFF858585 }, + { 0x070B0043, 0x07080A08, 0x0A090A0B, 0x0D0B0C0C, 0x11121C11, + 0x23110F0F, 0x1C141A19, 0x2B2B2429, 0x27282428, 0x3842332E, + 0x313E302E, 0x4E392827, 0x46443E3A, 0x2C4A4A4A, 0x50565137, + 0x48425647, 0xDBFF474A, 0x12014300, 0x161A1313, 0x1C1C331A, + 0x3D486C33, 0x6C6C6C48, 0x6C6C6C6C, 0x6C6C6C6C, 0x6C6C6C6C, + 0x6C6C6C6C, 0x6C6C6C6C, 0x6C6C6C6C, 0x6C6C6C6C, 0x6C6C6C6C, + 0x6C6C6C6C, 0x6C6C6C6C, 0x6C6C6C6C, 0xFF6C6C6C }, + { 0x06090043, 0x05060706, 0x07070709, 0x0A09090A, 0x0D0E160D, + 0x1B0D0C0C, 0x16101413, 0x21221C20, 0x1E1F1C20, 0x2B332824, + 0x26302624, 0x3D2D1F1E, 0x3735302D, 0x22393A39, 0x3F443F2B, + 0x38334338, 0xDBFF3739, 0x0D014300, 0x11130E0E, 0x15152613, + 0x2D355026, 0x50505035, 0x50505050, 0x50505050, 0x50505050, + 0x50505050, 0x50505050, 0x50505050, 0x50505050, 0x50505050, + 0x50505050, 0x50505050, 0x50505050, 0xFF505050 }, + { 0x04060043, 0x03040504, 0x05040506, 0x07060606, 0x09090F09, + 0x12090808, 0x0F0A0D0D, 0x16161315, 0x14151315, 0x1D221B18, + 0x19201918, 0x281E1514, 0x2423201E, 0x17262726, 0x2A2D2A1C, + 0x25222D25, 0xDBFF2526, 0x09014300, 0x0B0D0A0A, 0x0E0E1A0D, + 0x1F25371A, 0x37373725, 0x37373737, 0x37373737, 0x37373737, + 0x37373737, 0x37373737, 0x37373737, 0x37373737, 0x37373737, + 0x37373737, 0x37373737, 0x37373737, 0xFF373737 }, + { 0x02030043, 0x01020202, 0x02020203, 0x03030303, 0x04040704, + 0x09040404, 0x07050606, 0x0B0B090A, 0x0A0A090A, 0x0E110D0C, + 0x0C100C0C, 0x140F0A0A, 0x1211100F, 0x0B131313, 0x1516150E, + 0x12111612, 0xDBFF1213, 0x04014300, 0x05060505, 0x07070D06, + 0x0F121B0D, 0x1B1B1B12, 0x1B1B1B1B, 0x1B1B1B1B, 0x1B1B1B1B, + 0x1B1B1B1B, 0x1B1B1B1B, 0x1B1B1B1B, 0x1B1B1B1B, 0x1B1B1B1B, + 0x1B1B1B1B, 0x1B1B1B1B, 0x1B1B1B1B, 0xFF1B1B1B }, + { 0x01020043, 0x01010101, 0x01010102, 0x02020202, 0x03030503, + 0x06030202, 0x05030404, 0x07070607, 0x06070607, 0x090B0908, + 0x080A0808, 0x0D0A0706, 0x0C0B0A0A, 0x070C0D0C, 0x0E0F0E09, + 0x0C0B0F0C, 0xDBFF0C0C, 0x03014300, 0x03040303, 0x04040804, + 0x0A0C1208, 0x1212120C, 0x12121212, 0x12121212, 0x12121212, + 0x12121212, 0x12121212, 0x12121212, 0x12121212, 0x12121212, + 0x12121212, 0x12121212, 0x12121212, 0xFF121212 }, + { 0x01020043, 0x01010101, 0x01010102, 0x02020202, 0x03030503, + 0x06030202, 0x05030404, 0x07070607, 0x06070607, 0x090B0908, + 0x080A0808, 0x0D0A0706, 0x0C0B0A0A, 0x070C0D0C, 0x0E0F0E09, + 0x0C0B0F0C, 0xDBFF0C0C, 0x02014300, 0x03030202, 0x04040703, + 0x080A0F07, 0x0F0F0F0A, 0x0F0F0F0F, 0x0F0F0F0F, 0x0F0F0F0F, + 0x0F0F0F0F, 0x0F0F0F0F, 0x0F0F0F0F, 0x0F0F0F0F, 0x0F0F0F0F, + 0x0F0F0F0F, 0x0F0F0F0F, 0x0F0F0F0F, 0xFF0F0F0F }, + { 0x01010043, 0x01010101, 0x01010101, 0x01010101, 0x02020302, + 0x04020202, 0x03020303, 0x05050405, 0x05050405, 0x07080606, + 0x06080606, 0x0A070505, 0x09080807, 0x05090909, 0x0A0B0A07, + 0x09080B09, 0xDBFF0909, 0x02014300, 0x02030202, 0x03030503, + 0x07080C05, 0x0C0C0C08, 0x0C0C0C0C, 0x0C0C0C0C, 0x0C0C0C0C, + 0x0C0C0C0C, 0x0C0C0C0C, 0x0C0C0C0C, 0x0C0C0C0C, 0x0C0C0C0C, + 0x0C0C0C0C, 0x0C0C0C0C, 0x0C0C0C0C, 0xFF0C0C0C }, + { 0x01010043, 0x01010101, 0x01010101, 0x01010101, 0x01010201, + 0x03010101, 0x02010202, 0x03030303, 0x03030303, 0x04050404, + 0x04050404, 0x06050303, 0x06050505, 0x03060606, 0x07070704, + 0x06050706, 0xDBFF0606, 0x01014300, 0x01020101, 0x02020402, + 0x05060904, 0x09090906, 0x09090909, 0x09090909, 0x09090909, + 0x09090909, 0x09090909, 0x09090909, 0x09090909, 0x09090909, + 0x09090909, 0x09090909, 0x09090909, 0xFF090909 }, + { 0x01010043, 0x01010101, 0x01010101, 0x01010101, 0x01010101, + 0x01010101, 0x01010101, 0x01010101, 0x01010101, 0x02020202, + 0x02020202, 0x03020101, 0x03020202, 0x01030303, 0x03030302, + 0x03020303, 0xDBFF0403, 0x01014300, 0x01010101, 0x01010201, + 0x03040602, 0x06060604, 0x06060606, 0x06060606, 0x06060606, + 0x06060606, 0x06060606, 0x06060606, 0x06060606, 0x06060606, + 0x06060606, 0x06060606, 0x06060606, 0xFF060606 } +}; + +static void aspeed_video_init_jpeg_table(u32 *table, bool yuv420) +{ + int i; + unsigned int base; + + for (i = 0; i < ASPEED_VIDEO_JPEG_NUM_QUALITIES; i++) { + base = 256 * i; /* AST HW requires this header spacing */ + memcpy(&table[base], aspeed_video_jpeg_header, + sizeof(aspeed_video_jpeg_header)); + + base += ASPEED_VIDEO_JPEG_HEADER_SIZE; + memcpy(&table[base], aspeed_video_jpeg_dct[i], + sizeof(aspeed_video_jpeg_dct[i])); + + base += ASPEED_VIDEO_JPEG_DCT_SIZE; + memcpy(&table[base], aspeed_video_jpeg_quant, + sizeof(aspeed_video_jpeg_quant)); + + if (yuv420) + table[base + 2] = 0x00220103; + } +} + +static void aspeed_video_update(struct aspeed_video *video, u32 reg, + unsigned long mask, u32 bits) +{ + u32 t = readl(video->base + reg); + u32 before = t; + + t &= mask; + t |= bits; + writel(t, video->base + reg); + dev_dbg(video->dev, "update %03x[%08x -> %08x]\n", reg, before, + readl(video->base + reg)); +} + +static u32 aspeed_video_read(struct aspeed_video *video, u32 reg) +{ + u32 t = readl(video->base + reg); + + dev_dbg(video->dev, "read %03x[%08x]\n", reg, t); + return t; +} + +static void aspeed_video_write(struct aspeed_video *video, u32 reg, u32 val) +{ + writel(val, video->base + reg); + dev_dbg(video->dev, "write %03x[%08x]\n", reg, + readl(video->base + reg)); +} + +static bool aspeed_video_engine_busy(struct aspeed_video *video) +{ + u32 seq_ctrl = aspeed_video_read(video, VE_SEQ_CTRL); + + if (!(seq_ctrl & VE_SEQ_CTRL_COMP_BUSY) || + !(seq_ctrl & VE_SEQ_CTRL_CAP_BUSY)) { + dev_info(video->dev, "video engine busy\n"); + return true; + } + + return false; +} + +static int aspeed_video_start_frame(struct aspeed_video *video) +{ + if (aspeed_video_engine_busy(video)) + return -EBUSY; + + video->frame_idx = (video->frame_idx + 1) % 2; + + aspeed_video_write(video, VE_COMP_PROC_OFFSET, 0); + aspeed_video_write(video, VE_COMP_OFFSET, 0); + aspeed_video_write(video, VE_COMP_ADDR, + video->comp[video->frame_idx].dma); + + set_bit(VIDEO_FRAME_TRIGGERED, &video->flags); + + aspeed_video_update(video, VE_INTERRUPT_CTRL, 0xFFFFFFFF, + VE_INTERRUPT_COMP_COMPLETE | + VE_INTERRUPT_CAPTURE_COMPLETE); + + aspeed_video_update(video, VE_SEQ_CTRL, 0xFFFFFFFF, + VE_SEQ_CTRL_TRIG_CAPTURE | VE_SEQ_CTRL_TRIG_COMP); + + return 0; +} + +static void aspeed_video_start_mode_detect(struct aspeed_video *video) +{ + /* Enable mode detect interrupts */ + aspeed_video_update(video, VE_INTERRUPT_CTRL, 0xFFFFFFFF, + VE_INTERRUPT_MODE_DETECT); + + /* Trigger mode detect */ + aspeed_video_update(video, VE_SEQ_CTRL, 0xFFFFFFFF, + VE_SEQ_CTRL_TRIG_MODE_DET); +} + +static void aspeed_video_disable_mode_detect(struct aspeed_video *video) +{ + /* Disable mode detect interrupts */ + aspeed_video_update(video, VE_INTERRUPT_CTRL, + ~VE_INTERRUPT_MODE_DETECT, 0); + + /* Disable mode detect */ + aspeed_video_update(video, VE_SEQ_CTRL, ~VE_SEQ_CTRL_TRIG_MODE_DET, 0); +} + +static void aspeed_video_off(struct aspeed_video *video) +{ + /* Reset the engine */ + reset_control_assert(video->rst); + udelay(100); + reset_control_deassert(video->rst); + + /* Turn off the relevant clocks */ + clk_disable_unprepare(video->vclk); + clk_disable_unprepare(video->eclk); +} + +static void aspeed_video_on(struct aspeed_video *video) +{ + /* Turn on the relevant clocks */ + clk_prepare_enable(video->eclk); + clk_prepare_enable(video->vclk); + + /* Reset the engine */ + reset_control_assert(video->rst); + udelay(100); + reset_control_deassert(video->rst); +} + +static irqreturn_t aspeed_video_irq(int irq, void *arg) +{ + struct aspeed_video *video = arg; + u32 sts = aspeed_video_read(video, VE_INTERRUPT_STATUS); + + if (atomic_read(&video->clients) == 0) { + dev_info(video->dev, "irq with no client; disabling irqs\n"); + + aspeed_video_write(video, VE_INTERRUPT_CTRL, 0); + aspeed_video_write(video, VE_INTERRUPT_STATUS, 0xFFFFFFFF); + return IRQ_HANDLED; + } + + /* Resolution changed; reset entire engine and reinitialize */ + if (sts & VE_INTERRUPT_MODE_DETECT_WD) { + dev_info(video->dev, "resolution changed; resetting\n"); + set_bit(VIDEO_RES_CHANGE, &video->flags); + + aspeed_video_off(video); + + schedule_delayed_work(&video->res_work, + RESOLUTION_CHANGE_DELAY); + return IRQ_HANDLED; + } + + if (sts & VE_INTERRUPT_MODE_DETECT) { + aspeed_video_update(video, VE_INTERRUPT_CTRL, + ~VE_INTERRUPT_MODE_DETECT, 0); + aspeed_video_write(video, VE_INTERRUPT_STATUS, + VE_INTERRUPT_MODE_DETECT); + + set_bit(VIDEO_MODE_DETECT_DONE, &video->flags); + wake_up_interruptible_all(&video->wait); + } + + if ((sts & VE_INTERRUPT_COMP_COMPLETE) && + (sts & VE_INTERRUPT_CAPTURE_COMPLETE)) { + video->frame_size = aspeed_video_read(video, + VE_OFFSET_COMP_STREAM); + + aspeed_video_update(video, VE_INTERRUPT_CTRL, + ~(VE_INTERRUPT_COMP_COMPLETE | + VE_INTERRUPT_CAPTURE_COMPLETE), 0); + aspeed_video_write(video, VE_INTERRUPT_STATUS, + VE_INTERRUPT_COMP_COMPLETE | + VE_INTERRUPT_CAPTURE_COMPLETE); + aspeed_video_update(video, VE_SEQ_CTRL, + ~(VE_SEQ_CTRL_TRIG_CAPTURE | + VE_SEQ_CTRL_FORCE_IDLE | + VE_SEQ_CTRL_TRIG_COMP), 0); + + set_bit(VIDEO_FRAME_AVAILABLE, &video->flags); + clear_bit(VIDEO_FRAME_TRIGGERED, &video->flags); + wake_up_interruptible_all(&video->wait); + } + + return IRQ_HANDLED; +} + +static void aspeed_video_check_polarity(struct aspeed_video *video) +{ + int i; + int hsync_counter = 0; + int vsync_counter = 0; + u32 sts; + + for (i = 0; i < NUM_POLARITY_CHECKS; ++i) { + sts = aspeed_video_read(video, VE_MODE_DETECT_STATUS); + if (sts & VE_MODE_DETECT_STATUS_VSYNC) + vsync_counter--; + else + vsync_counter++; + + if (sts & VE_MODE_DETECT_STATUS_HSYNC) + hsync_counter--; + else + hsync_counter++; + } + + if (hsync_counter < 0 || vsync_counter < 0) { + u32 ctrl; + + if (hsync_counter < 0) + ctrl = VE_CTRL_HSYNC_POL; + + if (vsync_counter < 0) + ctrl = VE_CTRL_VSYNC_POL; + + aspeed_video_update(video, VE_CTRL, 0xFFFFFFFF, ctrl); + } +} + +#define res_check(v) test_and_clear_bit(VIDEO_MODE_DETECT_DONE, &(v)->flags) + +static int aspeed_video_get_resolution(struct aspeed_video *video) +{ + bool invalid_resolution = true; + int rc; + int tries = 0; + unsigned int bottom; + unsigned int left; + unsigned int right; + unsigned int top; + u32 src_lr_edge; + u32 src_tb_edge; + + video->width = 0; + video->height = 0; + + do { + if (tries) { + set_current_state(TASK_INTERRUPTIBLE); + if (schedule_timeout(INVALID_RESOLUTION_DELAY)) + return -EINTR; + } + + aspeed_video_start_mode_detect(video); + + rc = wait_event_interruptible_timeout(video->wait, + res_check(video), + MODE_DETECT_TIMEOUT); + if (!rc) { + dev_err(video->dev, "timed out on 1st mode detect\n"); + aspeed_video_disable_mode_detect(video); + return -ETIME; + } + + /* Disable mode detect in order to re-trigger */ + aspeed_video_update(video, VE_SEQ_CTRL, + ~VE_SEQ_CTRL_TRIG_MODE_DET, 0); + + aspeed_video_check_polarity(video); + + aspeed_video_start_mode_detect(video); + + rc = wait_event_interruptible_timeout(video->wait, + res_check(video), + MODE_DETECT_TIMEOUT); + if (!rc) { + dev_err(video->dev, "timed out on 2nd mode detect\n"); + aspeed_video_disable_mode_detect(video); + return -ETIME; + } + + src_lr_edge = aspeed_video_read(video, VE_SRC_LR_EDGE_DET); + src_tb_edge = aspeed_video_read(video, VE_SRC_TB_EDGE_DET); + + bottom = (src_tb_edge & VE_SRC_TB_EDGE_DET_BOT) >> + VE_SRC_TB_EDGE_DET_BOT_SHF; + top = src_tb_edge & VE_SRC_TB_EDGE_DET_TOP; + if (top > bottom) + continue; + + right = (src_lr_edge & VE_SRC_LR_EDGE_DET_RT) >> + VE_SRC_LR_EDGE_DET_RT_SHF; + left = src_lr_edge & VE_SRC_LR_EDGE_DET_LEFT; + if (left > right) + continue; + + invalid_resolution = false; + } while (invalid_resolution && (tries++ < INVALID_RESOLUTION_RETRIES)); + + if (invalid_resolution) { + dev_err(video->dev, "invalid resolution detected\n"); + return -EMSGSIZE; + } + + video->height = (bottom - top) + 1; + video->width = (right - left) + 1; + + /* Don't use direct mode below 1024 x 768 (irqs don't fire) */ + if (video->height * video->width < DIRECT_FETCH_THRESHOLD) { + aspeed_video_write(video, VE_TGS_0, + FIELD_PREP(VE_TGS_FIRST, left - 1) | + FIELD_PREP(VE_TGS_LAST, right)); + aspeed_video_write(video, VE_TGS_1, + FIELD_PREP(VE_TGS_FIRST, top) | + FIELD_PREP(VE_TGS_LAST, bottom + 1)); + aspeed_video_update(video, VE_CTRL, + ~VE_CTRL_DIRECT_FETCH, VE_CTRL_INT_DE); + } + + aspeed_video_write(video, VE_CAP_WINDOW, + video->width << 16 | video->height); + aspeed_video_write(video, VE_COMP_WINDOW, + video->width << 16 | video->height); + aspeed_video_write(video, VE_SRC_SCANLINE_OFFSET, video->width * 4); + + aspeed_video_update(video, VE_INTERRUPT_CTRL, 0xFFFFFFFF, + VE_INTERRUPT_MODE_DETECT_WD); + aspeed_video_update(video, VE_SEQ_CTRL, 0xFFFFFFFF, + VE_SEQ_CTRL_EN_WATCHDOG); + + dev_dbg(video->dev, "got resolution[%dx%d]\n", video->width, + video->height); + + return 0; +} + +static void aspeed_video_init_regs(struct aspeed_video *video) +{ + u32 comp_ctrl = VE_COMP_CTRL_RSVD | + FIELD_PREP(VE_COMP_CTRL_DCT_LUM, video->jpeg_quality) | + FIELD_PREP(VE_COMP_CTRL_DCT_CHR, video->jpeg_quality | 0x10); + u32 ctrl = VE_CTRL_DIRECT_FETCH | VE_CTRL_AUTO_OR_CURSOR; + u32 seq_ctrl = VE_SEQ_CTRL_AUTO_COMP | VE_SEQ_CTRL_JPEG_MODE; + + if (video->frame_rate) + ctrl |= FIELD_PREP(VE_CTRL_FRC, video->frame_rate); + + if (video->yuv420) + seq_ctrl |= VE_SEQ_CTRL_YUV420; + + /* Unlock VE registers */ + aspeed_video_write(video, VE_PROTECTION_KEY, VE_PROTECTION_KEY_UNLOCK); + + /* Disable interrupts */ + aspeed_video_write(video, VE_INTERRUPT_CTRL, 0); + aspeed_video_write(video, VE_INTERRUPT_STATUS, 0xFFFFFFFF); + + /* Clear the offset */ + aspeed_video_write(video, VE_COMP_PROC_OFFSET, 0); + aspeed_video_write(video, VE_COMP_OFFSET, 0); + + /* Set memory restrictions */ + aspeed_video_write(video, VE_MEM_RESTRICT_START, video->min); + aspeed_video_write(video, VE_MEM_RESTRICT_END, video->max); + + /* Set buffer addresses */ + aspeed_video_write(video, VE_SRC0_ADDR, video->srcs[0].dma); + aspeed_video_write(video, VE_SRC1_ADDR, video->srcs[1].dma); + aspeed_video_write(video, VE_COMP_ADDR, video->comp[0].dma); + aspeed_video_write(video, VE_JPEG_ADDR, video->jpeg.dma); + + /* Set control registers */ + aspeed_video_write(video, VE_SEQ_CTRL, seq_ctrl); + aspeed_video_write(video, VE_CTRL, ctrl); + aspeed_video_write(video, VE_COMP_CTRL, comp_ctrl); + + /* Compression buffer size; 128K packet * 8 packets */ + aspeed_video_write(video, VE_STREAM_BUF_SIZE, 0xf); + + /* Don't downscale */ + aspeed_video_write(video, VE_SCALING_FACTOR, 0x10001000); + aspeed_video_write(video, VE_SCALING_FILTER0, 0x00200000); + aspeed_video_write(video, VE_SCALING_FILTER1, 0x00200000); + aspeed_video_write(video, VE_SCALING_FILTER2, 0x00200000); + aspeed_video_write(video, VE_SCALING_FILTER3, 0x00200000); + + /* Set mode detection defaults */ + aspeed_video_write(video, VE_MODE_DETECT, 0x22666500); +} + +static int aspeed_video_allocate_cma(struct aspeed_video *video) +{ + video->srcs[0].virt = dma_alloc_coherent(video->dev, + VE_SRC_BUFFER_SIZE, + &video->srcs[0].dma, + GFP_KERNEL); + if (!video->srcs[0].virt) { + dev_err(video->dev, + "Failed to allocate source buffer 0, size[%x]\n", + VE_SRC_BUFFER_SIZE); + goto err; + } + + video->srcs[1].virt = dma_alloc_coherent(video->dev, + VE_SRC_BUFFER_SIZE, + &video->srcs[1].dma, + GFP_KERNEL); + if (!video->srcs[1].virt) { + dev_err(video->dev, + "Failed to allocate source buffer 1, size[%x]\n", + VE_SRC_BUFFER_SIZE); + goto free_src0; + } + + video->comp[0].virt = dma_alloc_coherent(video->dev, + VE_COMP_BUFFER_SIZE, + &video->comp[0].dma, + GFP_KERNEL); + if (!video->comp[0].virt) { + dev_err(video->dev, + "Failed to allocate compression buffer 0, size[%x]\n", + VE_COMP_BUFFER_SIZE); + goto free_src1; + } + + video->comp[1].virt = dma_alloc_coherent(video->dev, + VE_COMP_BUFFER_SIZE, + &video->comp[1].dma, + GFP_KERNEL); + if (!video->comp[0].virt) { + dev_err(video->dev, + "Failed to allocate compression buffer 1, size[%x]\n", + VE_COMP_BUFFER_SIZE); + goto free_comp0; + } + + video->jpeg.virt = dma_alloc_coherent(video->dev, VE_JPEG_BUFFER_SIZE, + &video->jpeg.dma, GFP_KERNEL); + if (!video->jpeg.virt) { + dev_err(video->dev, + "Failed to allocate JPEG buffer, size[%x]\n", + VE_JPEG_BUFFER_SIZE); + goto free_comp1; + } + + aspeed_video_init_jpeg_table(video->jpeg.virt, video->yuv420); + + /* + * Calculate the memory restrictions. Don't consider the JPEG header + * buffer since HW doesn't need to write to it. + */ + video->max = max(video->srcs[0].dma + VE_SRC_BUFFER_SIZE, + video->srcs[1].dma + VE_SRC_BUFFER_SIZE); + video->max = max(video->max, video->comp[0].dma + VE_COMP_BUFFER_SIZE); + video->max = max(video->max, video->comp[1].dma + VE_COMP_BUFFER_SIZE); + + video->min = min(video->srcs[0].dma, video->srcs[1].dma); + video->min = min(video->min, video->comp[0].dma); + video->min = min(video->min, video->comp[1].dma); + + return 0; + +free_comp1: + dma_free_coherent(video->dev, VE_COMP_BUFFER_SIZE, video->comp[1].virt, + video->comp[1].dma); + video->comp[1].dma = 0ULL; + video->comp[1].virt = NULL; + +free_comp0: + dma_free_coherent(video->dev, VE_COMP_BUFFER_SIZE, video->comp[0].virt, + video->comp[0].dma); + video->comp[0].dma = 0ULL; + video->comp[0].virt = NULL; + +free_src1: + dma_free_coherent(video->dev, VE_SRC_BUFFER_SIZE, video->srcs[1].virt, + video->srcs[1].dma); + video->srcs[1].dma = 0ULL; + video->srcs[1].virt = NULL; + +free_src0: + dma_free_coherent(video->dev, VE_SRC_BUFFER_SIZE, video->srcs[0].virt, + video->srcs[0].dma); + video->srcs[0].dma = 0ULL; + video->srcs[0].virt = NULL; +err: + return -ENOMEM; +} + +static void aspeed_video_free_cma(struct aspeed_video *video) +{ + dma_free_coherent(video->dev, VE_JPEG_BUFFER_SIZE, video->jpeg.virt, + video->jpeg.dma); + dma_free_coherent(video->dev, VE_COMP_BUFFER_SIZE, video->comp[1].virt, + video->comp[1].dma); + dma_free_coherent(video->dev, VE_COMP_BUFFER_SIZE, video->comp[0].virt, + video->comp[0].dma); + dma_free_coherent(video->dev, VE_SRC_BUFFER_SIZE, video->srcs[1].virt, + video->srcs[1].dma); + dma_free_coherent(video->dev, VE_SRC_BUFFER_SIZE, video->srcs[0].virt, + video->srcs[0].dma); + + video->srcs[0].dma = 0ULL; + video->srcs[0].virt = NULL; + video->srcs[1].dma = 0ULL; + video->srcs[1].virt = NULL; + video->comp[0].dma = 0ULL; + video->comp[0].virt = NULL; + video->comp[1].dma = 0ULL; + video->comp[1].virt = NULL; + video->jpeg.dma = 0ULL; + video->jpeg.virt = NULL; +} + +static int aspeed_video_start(struct aspeed_video *video) +{ + int rc = aspeed_video_allocate_cma(video); + + if (rc) + return rc; + + aspeed_video_on(video); + + aspeed_video_init_regs(video); + + rc = aspeed_video_get_resolution(video); + if (rc) + aspeed_video_free_cma(video); + + video->v4l2_fmt.fmt.pix.width = video->width; + video->v4l2_fmt.fmt.pix.height = video->height; + video->v4l2_fmt.fmt.pix.sizeimage = video->width * video->height * 4; + + clear_bit(VIDEO_FRAME_TRIGGERED, &video->flags); + + return rc; +} + +static void aspeed_video_stop(struct aspeed_video *video) +{ + cancel_delayed_work_sync(&video->res_work); + + aspeed_video_off(video); + + aspeed_video_free_cma(video); + + clear_bit(VIDEO_FRAME_AVAILABLE, &video->flags); +} + +static int aspeed_video_querycap(struct file *file, void *fh, + struct v4l2_capability *cap) +{ + strlcpy(cap->driver, DEVICE_NAME, sizeof(cap->driver)); + strlcpy(cap->card, "Aspeed Video Engine", sizeof(cap->card)); + snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s", + DEVICE_NAME); + + return 0; +} + +static int aspeed_video_enum_format(struct file *file, void *fh, + struct v4l2_fmtdesc *f) +{ + if (f->index) + return -EINVAL; + + f->pixelformat = V4L2_PIX_FMT_JPEG; + strlcpy(f->description, "JPEG", sizeof(f->description)); + f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + f->flags = V4L2_FMT_FLAG_COMPRESSED; + + return 0; +} + +static int aspeed_video_get_format(struct file *file, void *fh, + struct v4l2_format *f) +{ + struct aspeed_video *video = video_drvdata(file); + + *f = video->v4l2_fmt; + + return 0; +} + +static int aspeed_video_set_format(struct file *file, void *fh, + struct v4l2_format *f) +{ + struct aspeed_video *video = video_drvdata(file); + + if (f->fmt.pix.width == video->width) + video->v4l2_fmt.fmt.pix.width = video->width; + + if (f->fmt.pix.height == video->height) + video->v4l2_fmt.fmt.pix.height = video->height; + + return aspeed_video_get_format(file, fh, f); +} + +static int aspeed_video_try_format(struct file *file, void *fh, + struct v4l2_format *f) +{ + int rc; + struct aspeed_video *video = video_drvdata(file); + struct v4l2_pix_format pix = f->fmt.pix; + + rc = aspeed_video_get_format(file, fh, f); + if (rc) + return rc; + + if (pix.width == video->width) + f->fmt.pix.width = video->width; + + if (pix.height == video->height) + f->fmt.pix.height = video->height; + + return 0; +} + +static int aspeed_video_enum_input(struct file *file, void *fh, + struct v4l2_input *inp) +{ + if (inp->index) + return -EINVAL; + + strlcpy(inp->name, "Host VGA capture", sizeof(inp->name)); + inp->type = V4L2_INPUT_TYPE_CAMERA; + + return 0; +} + +static int aspeed_video_get_input(struct file *file, void *fh, unsigned int *i) +{ + *i = 0; + + return 0; +} + +static int aspeed_video_set_input(struct file *file, void *fh, unsigned int i) +{ + if (i) + return -EINVAL; + + return 0; +} + +static int aspeed_video_get_parm(struct file *file, void *fh, + struct v4l2_streamparm *a) +{ + struct aspeed_video *video = video_drvdata(file); + + a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + a->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; + a->parm.capture.timeperframe.numerator = 1; + if (!video->frame_rate) + a->parm.capture.timeperframe.denominator = MAX_FRAME_RATE + 1; + else + a->parm.capture.timeperframe.denominator = video->frame_rate; + + return 0; +} + +static int aspeed_video_set_parm(struct file *file, void *fh, + struct v4l2_streamparm *a) +{ + int frame_rate; + struct aspeed_video *video = video_drvdata(file); + + if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + a->parm.capture.capability = V4L2_CAP_TIMEPERFRAME; + + if (a->parm.capture.timeperframe.numerator) { + frame_rate = a->parm.capture.timeperframe.denominator / + a->parm.capture.timeperframe.numerator; + } else { + frame_rate = 0; + a->parm.capture.timeperframe.numerator = 1; + } + + if (frame_rate < 0 || frame_rate > MAX_FRAME_RATE) + frame_rate = 0; + + if (!frame_rate) + a->parm.capture.timeperframe.denominator = MAX_FRAME_RATE + 1; + + if (video->frame_rate != frame_rate) { + video->frame_rate = frame_rate; + aspeed_video_update(video, VE_CTRL, ~VE_CTRL_FRC, + FIELD_PREP(VE_CTRL_FRC, frame_rate)); + } + + return 0; +} + +static int aspeed_video_enum_framesizes(struct file *file, void *fh, + struct v4l2_frmsizeenum *fsize) +{ + struct aspeed_video *video = video_drvdata(file); + + if (fsize->pixel_format != V4L2_PIX_FMT_JPEG) + return -EINVAL; + + switch (fsize->index) { + case 0: + fsize->discrete.width = video->v4l2_fmt.fmt.pix.width; + fsize->discrete.height = video->v4l2_fmt.fmt.pix.height; + break; + case 1: + if (video->width == video->v4l2_fmt.fmt.pix.width && + video->height == video->v4l2_fmt.fmt.pix.height) + return -EINVAL; + + fsize->discrete.width = video->width; + fsize->discrete.height = video->height; + break; + default: + return -EINVAL; + } + + fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; + + return 0; +} + +static int aspeed_video_enum_frameintervals(struct file *file, void *fh, + struct v4l2_frmivalenum *fival) +{ + struct aspeed_video *video = video_drvdata(file); + + if (fival->index) + return -EINVAL; + + if (fival->width != video->width || fival->height != video->height) + return -EINVAL; + + if (fival->pixel_format != V4L2_PIX_FMT_JPEG) + return -EINVAL; + + fival->type = V4L2_FRMIVAL_TYPE_CONTINUOUS; + + fival->stepwise.min.denominator = MAX_FRAME_RATE; + fival->stepwise.min.numerator = 1; + fival->stepwise.max.denominator = 1; + fival->stepwise.max.numerator = 1; + fival->stepwise.step = fival->stepwise.max; + + return 0; +} + +static const struct v4l2_ioctl_ops aspeed_video_ioctl_ops = { + .vidioc_querycap = aspeed_video_querycap, + .vidioc_enum_fmt_vid_cap = aspeed_video_enum_format, + .vidioc_g_fmt_vid_cap = aspeed_video_get_format, + .vidioc_s_fmt_vid_cap = aspeed_video_set_format, + .vidioc_try_fmt_vid_cap = aspeed_video_try_format, + .vidioc_enum_input = aspeed_video_enum_input, + .vidioc_g_input = aspeed_video_get_input, + .vidioc_s_input = aspeed_video_set_input, + .vidioc_g_parm = aspeed_video_get_parm, + .vidioc_s_parm = aspeed_video_set_parm, + .vidioc_enum_framesizes = aspeed_video_enum_framesizes, + .vidioc_enum_frameintervals = aspeed_video_enum_frameintervals, + .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, + .vidioc_unsubscribe_event = v4l2_event_unsubscribe, +}; + +static void aspeed_video_update_jpeg_quality(struct aspeed_video *video) +{ + u32 comp_ctrl = FIELD_PREP(VE_COMP_CTRL_DCT_LUM, video->jpeg_quality) | + FIELD_PREP(VE_COMP_CTRL_DCT_CHR, video->jpeg_quality | 0x10); + + aspeed_video_update(video, VE_COMP_CTRL, + ~(VE_COMP_CTRL_DCT_LUM | VE_COMP_CTRL_DCT_CHR), + comp_ctrl); +} + +static void aspeed_video_update_subsampling(struct aspeed_video *video) +{ + if (video->jpeg.virt) + aspeed_video_init_jpeg_table(video->jpeg.virt, video->yuv420); + + if (video->yuv420) + aspeed_video_update(video, VE_SEQ_CTRL, 0xFFFFFFFF, + VE_SEQ_CTRL_YUV420); + else + aspeed_video_update(video, VE_SEQ_CTRL, ~VE_SEQ_CTRL_YUV420, + 0); +} + +static int aspeed_video_set_ctrl(struct v4l2_ctrl *ctrl) +{ + struct aspeed_video *video = container_of(ctrl->handler, + struct aspeed_video, + v4l2_ctrl); + + switch (ctrl->id) { + case V4L2_CID_JPEG_COMPRESSION_QUALITY: + if (video->jpeg_quality != ctrl->val) { + video->jpeg_quality = ctrl->val; + aspeed_video_update_jpeg_quality(video); + } + break; + case V4L2_CID_JPEG_CHROMA_SUBSAMPLING: + if (ctrl->val == V4L2_JPEG_CHROMA_SUBSAMPLING_420) { + if (!video->yuv420) { + video->yuv420 = true; + aspeed_video_update_subsampling(video); + } + } else { + if (video->yuv420) { + video->yuv420 = false; + aspeed_video_update_subsampling(video); + } + } + break; + default: + return -EINVAL; + } + + return 0; +} + +static const struct v4l2_ctrl_ops aspeed_video_ctrl_ops = { + .s_ctrl = aspeed_video_set_ctrl, +}; + +static void aspeed_video_resolution_work(struct work_struct *work) +{ + int rc; + struct delayed_work *dwork = to_delayed_work(work); + struct aspeed_video *video = container_of(dwork, struct aspeed_video, + res_work); + + /* No clients remaining after delay */ + if (atomic_read(&video->clients) == 0) + goto done; + + aspeed_video_on(video); + + aspeed_video_init_regs(video); + + rc = aspeed_video_get_resolution(video); + if (rc) { + dev_err(video->dev, + "resolution changed; couldn't get new resolution\n"); + } else { + video->frame_idx = 0; + clear_bit(VIDEO_FRAME_TRIGGERED, &video->flags); + } + +done: + clear_bit(VIDEO_RES_CHANGE, &video->flags); + wake_up_interruptible_all(&video->wait); +} + +static bool aspeed_video_frame_available(struct aspeed_video *video) +{ + if (!test_and_clear_bit(VIDEO_FRAME_AVAILABLE, &video->flags)) { + if (!test_bit(VIDEO_FRAME_TRIGGERED, &video->flags)) + aspeed_video_start_frame(video); + + return false; + } + + return true; +} + +static ssize_t aspeed_video_file_read(struct file *file, char __user *buf, + size_t count, loff_t *ppos) +{ + int rc; + int fidx; + size_t size; + struct aspeed_video *video = video_drvdata(file); + + if (mutex_lock_interruptible(&video->video_lock)) + return -EINTR; + + if (file->f_flags & O_NONBLOCK) { + if (!aspeed_video_frame_available(video)) { + rc = -EAGAIN; + goto unlock; + } else { + goto ready; + } + } + + rc = wait_event_interruptible(video->wait, + aspeed_video_frame_available(video)); + if (rc) { + rc = -EINTR; + goto unlock; + } + +ready: + fidx = video->frame_idx; + size = min_t(size_t, video->frame_size, count); + aspeed_video_start_frame(video); + + if (copy_to_user(buf, video->comp[fidx].virt, size)) { + rc = -EFAULT; + goto unlock; + } + + rc = size; + +unlock: + mutex_unlock(&video->video_lock); + return rc; +} + +static int aspeed_video_open(struct file *file) +{ + int rc; + struct aspeed_video *video = video_drvdata(file); + + if (atomic_inc_return(&video->clients) == 1) { + rc = aspeed_video_start(video); + if (rc) { + dev_err(video->dev, "Failed to start video engine\n"); + atomic_dec(&video->clients); + return rc; + } + } + + return v4l2_fh_open(file); +} + +static int aspeed_video_release(struct file *file) +{ + int rc; + struct aspeed_video *video = video_drvdata(file); + + rc = v4l2_fh_release(file); + + if (atomic_dec_return(&video->clients) == 0) + aspeed_video_stop(video); + + return rc; +} + +static const struct v4l2_file_operations aspeed_video_v4l2_fops = { + .owner = THIS_MODULE, + .read = aspeed_video_file_read, + .poll = v4l2_ctrl_poll, + .unlocked_ioctl = video_ioctl2, + .open = aspeed_video_open, + .release = aspeed_video_release, +}; + +static void aspeed_video_device_release(struct video_device *vdev) +{ +} + +static int aspeed_video_setup_video(struct aspeed_video *video) +{ + int rc; + u64 mask = ~(BIT(V4L2_JPEG_CHROMA_SUBSAMPLING_444) | + BIT(V4L2_JPEG_CHROMA_SUBSAMPLING_420)); + struct v4l2_device *v4l2_dev = &video->v4l2_dev; + struct video_device *vdev = &video->vdev; + + rc = v4l2_device_register(video->dev, v4l2_dev); + if (rc) { + dev_err(video->dev, "Failed to register v4l2 device\n"); + return rc; + } + + vdev->fops = &aspeed_video_v4l2_fops; + vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE; + vdev->v4l2_dev = v4l2_dev; + strncpy(vdev->name, DEVICE_NAME, sizeof(vdev->name)); + vdev->vfl_type = VFL_TYPE_GRABBER; + vdev->vfl_dir = VFL_DIR_RX; + vdev->release = aspeed_video_device_release; + vdev->ioctl_ops = &aspeed_video_ioctl_ops; + vdev->lock = &video->video_lock; + + video_set_drvdata(vdev, video); + rc = video_register_device(vdev, VFL_TYPE_GRABBER, 0); + if (rc) { + v4l2_device_unregister(v4l2_dev); + dev_err(video->dev, "Failed to register video device\n"); + return rc; + } + + video->v4l2_fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + video->v4l2_fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_JPEG; + video->v4l2_fmt.fmt.pix.field = V4L2_FIELD_NONE; + video->v4l2_fmt.fmt.pix.colorspace = V4L2_COLORSPACE_JPEG; + + /* Don't fail the probe if controls init fails */ + v4l2_ctrl_handler_init(&video->v4l2_ctrl, 2); + + v4l2_ctrl_new_std(&video->v4l2_ctrl, &aspeed_video_ctrl_ops, + V4L2_CID_JPEG_COMPRESSION_QUALITY, 0, + ASPEED_VIDEO_JPEG_NUM_QUALITIES - 1, 1, 0); + + v4l2_ctrl_new_std_menu(&video->v4l2_ctrl, &aspeed_video_ctrl_ops, + V4L2_CID_JPEG_CHROMA_SUBSAMPLING, + V4L2_JPEG_CHROMA_SUBSAMPLING_420, mask, + V4L2_JPEG_CHROMA_SUBSAMPLING_444); + + if (video->v4l2_ctrl.error) { + dev_info(video->dev, "Failed to init controls: %d\n", + video->v4l2_ctrl.error); + v4l2_ctrl_handler_free(&video->v4l2_ctrl); + } else { + v4l2_dev->ctrl_handler = &video->v4l2_ctrl; + vdev->ctrl_handler = &video->v4l2_ctrl; + } + + return 0; +} + +static int aspeed_video_init(struct aspeed_video *video) +{ + int irq; + int rc; + struct device *dev = video->dev; + + irq = irq_of_parse_and_map(dev->of_node, 0); + if (!irq) { + dev_err(dev, "Unable to find IRQ\n"); + return -ENODEV; + } + + rc = devm_request_irq(dev, irq, aspeed_video_irq, IRQF_SHARED, + DEVICE_NAME, video); + if (rc < 0) { + dev_err(dev, "Unable to request IRQ %d\n", irq); + return rc; + } + + video->eclk = devm_clk_get(dev, "eclk"); + if (IS_ERR(video->eclk)) { + dev_err(dev, "Unable to get ECLK\n"); + return PTR_ERR(video->eclk); + } + + video->vclk = devm_clk_get(dev, "vclk"); + if (IS_ERR(video->vclk)) { + dev_err(dev, "Unable to get VCLK\n"); + return PTR_ERR(video->vclk); + } + + video->rst = devm_reset_control_get_exclusive(dev, NULL); + if (IS_ERR(video->rst)) { + dev_err(dev, "Unable to get VE reset\n"); + return PTR_ERR(video->rst); + } + + rc = of_reserved_mem_device_init(dev); + if (rc) { + dev_err(dev, "Unable to reserve memory\n"); + return rc; + } + + rc = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); + if (rc) { + dev_err(dev, "Failed to set DMA mask\n"); + of_reserved_mem_device_release(dev); + return rc; + } + + return 0; +} + +static int aspeed_video_probe(struct platform_device *pdev) +{ + int rc; + struct resource *res; + struct aspeed_video *video = kzalloc(sizeof(*video), GFP_KERNEL); + + if (!video) + return -ENOMEM; + + video->frame_rate = 30; + video->dev = &pdev->dev; + mutex_init(&video->video_lock); + init_waitqueue_head(&video->wait); + INIT_DELAYED_WORK(&video->res_work, aspeed_video_resolution_work); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + + video->base = devm_ioremap_resource(video->dev, res); + + if (IS_ERR(video->base)) + return PTR_ERR(video->base); + + rc = aspeed_video_init(video); + if (rc) + return rc; + + rc = aspeed_video_setup_video(video); + if (rc) + return rc; + + return 0; +} + +static int aspeed_video_remove(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct v4l2_device *v4l2_dev = dev_get_drvdata(dev); + struct aspeed_video *video = to_aspeed_video(v4l2_dev); + + if (video->vdev.ctrl_handler) + v4l2_ctrl_handler_free(&video->v4l2_ctrl); + + video_unregister_device(&video->vdev); + + v4l2_device_unregister(v4l2_dev); + + of_reserved_mem_device_release(dev); + + return 0; +} + +static const struct of_device_id aspeed_video_of_match[] = { + { .compatible = "aspeed,ast2400-video-engine" }, + { .compatible = "aspeed,ast2500-video-engine" }, + {} +}; +MODULE_DEVICE_TABLE(of, aspeed_video_of_match); + +static struct platform_driver aspeed_video_driver = { + .driver = { + .name = DEVICE_NAME, + .of_match_table = aspeed_video_of_match, + }, + .probe = aspeed_video_probe, + .remove = aspeed_video_remove, +}; + +module_platform_driver(aspeed_video_driver); + +MODULE_DESCRIPTION("ASPEED Video Engine Driver"); +MODULE_AUTHOR("Eddie James"); +MODULE_LICENSE("GPL v2");