From patchwork Wed May 18 07:46:28 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Songjun Wu X-Patchwork-Id: 9116651 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 [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id CE9929F30C for ; Wed, 18 May 2016 07:56:20 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 7FDFA202AE for ; Wed, 18 May 2016 07:56:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7A848201FE for ; Wed, 18 May 2016 07:56:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752494AbcERHzA (ORCPT ); Wed, 18 May 2016 03:55:00 -0400 Received: from nasmtp01.atmel.com ([192.199.1.245]:4719 "EHLO ussmtp01.atmel.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752355AbcERHy4 (ORCPT ); Wed, 18 May 2016 03:54:56 -0400 Received: from sjogate2.atmel.com (10.42.103.223) by DVREDG01.corp.atmel.com (10.42.103.30) with Microsoft SMTP Server id 14.3.235.1; Wed, 18 May 2016 01:54:50 -0600 Received: from shaarm01.corp.atmel.com (shaarm01.corp.atmel.com [10.217.6.34]) by sjogate2.atmel.com (8.13.6/8.13.6) with ESMTP id u4I7ilHD019861; Wed, 18 May 2016 00:45:00 -0700 (PDT) From: Songjun Wu To: , , CC: , Songjun Wu , Mauro Carvalho Chehab , Hans Verkuil , Geert Uytterhoeven , Sudip Mukherjee , Fabien Dessenne , Simon Horman , Benoit Parrot , Mikhail Ulyanov , Peter Griffin , =?UTF-8?q?Richard=20R=C3=B6jfors?= , , Subject: [PATCH v2 1/2] [media] atmel-isc: add the Image Sensor Controller code Date: Wed, 18 May 2016 15:46:28 +0800 Message-ID: <1463557590-29318-2-git-send-email-songjun.wu@atmel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1463557590-29318-1-git-send-email-songjun.wu@atmel.com> References: <1463557590-29318-1-git-send-email-songjun.wu@atmel.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=-8.3 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable 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 driver for the Image Sensor Controller. It manages incoming data from a parallel based CMOS/CCD sensor. It has an internal image processor, also integrates a triple channel direct memory access controller master interface. Signed-off-by: Songjun Wu --- Changes in v2: - Add "depends on COMMON_CLK && VIDEO_V4L2_SUBDEV_API" in Kconfig file. - Delete the redundant blank in atmel-isc-regs.h - Enclose the expression in parentheses in some macros. - Sort the header file alphabetically. - Move the 'to_isc_clk(hw)' right after the struct isc_clk definition - Move the global variables into the struct isc_device. - Change some int variable to unsigned int variable. - Replace pr_debug() with dev_dbg(); - Delete the loop while in 'isc_clk_enable' function. - Rename the 'tmp_rate' and 'tmp_diff' to 'rate' and 'diff' in 'isc_clk_determine_rate' function. - Delete the inner parentheses in 'isc_clk_register' function. - Delete the variable i in 'isc_parse_dt' function. - Replace 'hsync_active', 'vsync_active' and 'pclk_sample' with 'pfe_cfg0' in struct isc_subdev_entity. - Move the 'isc_parse_dt'function down right above the 'atmel_isc_probe' function. - Add the code to support VIDIOC_CREATE_BUFS in 'isc_queue_setup' function. - Replace the variable type 'unsigned long' with 'dma_addr_t' in 'isc_start_dma' function. - Remove the list_del call, turn list_for_each_entry_safe into list_for_each entry, and add a INIT_LIST_HEAD after the loop in 'isc_start_streaming', 'isc_stop_streaming' and 'isc_subdev_cleanup' function. - Invoke isc_config to configure register in 'isc_start_streaming' function. - Add the struct completion 'comp' to synchronize with the frame end interrupt in 'isc_stop_streaming' function. - Check the return value of the clk_prepare_enable in 'isc_open' function. - Set the default format in 'isc_open' function. - Add an exit condition in the loop while in 'isc_config'. - Delete the hardware setup operation in 'isc_set_format'. - Refuse format modification during streaming in 'isc_s_fmt_vid_cap' function. - Invoke v4l2_subdev_alloc_pad_config to allocate and initialize the pad config in 'isc_async_complete' function. - Remove the check of the '!res' since devm_ioremap_resource() will check for it. - Remove the error message in case of failure when call devm_ioremap_resource. - Remove the cast the isc pointer to (void *). - Remove the '.owner = THIS_MODULE,' in atmel_isc_driver. - Replace the module_platform_driver_probe() with module_platform_driver(). drivers/media/platform/Kconfig | 1 + drivers/media/platform/Makefile | 2 + drivers/media/platform/atmel/Kconfig | 9 + drivers/media/platform/atmel/Makefile | 1 + drivers/media/platform/atmel/atmel-isc-regs.h | 276 +++++ drivers/media/platform/atmel/atmel-isc.c | 1583 +++++++++++++++++++++++++ 6 files changed, 1872 insertions(+) create mode 100644 drivers/media/platform/atmel/Kconfig create mode 100644 drivers/media/platform/atmel/Makefile create mode 100644 drivers/media/platform/atmel/atmel-isc-regs.h create mode 100644 drivers/media/platform/atmel/atmel-isc.c diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig index 84e041c..91d7aea 100644 --- a/drivers/media/platform/Kconfig +++ b/drivers/media/platform/Kconfig @@ -110,6 +110,7 @@ source "drivers/media/platform/exynos4-is/Kconfig" source "drivers/media/platform/s5p-tv/Kconfig" source "drivers/media/platform/am437x/Kconfig" source "drivers/media/platform/xilinx/Kconfig" +source "drivers/media/platform/atmel/Kconfig" config VIDEO_TI_CAL tristate "TI CAL (Camera Adaptation Layer) driver" diff --git a/drivers/media/platform/Makefile b/drivers/media/platform/Makefile index bbb7bd1..ad8f471 100644 --- a/drivers/media/platform/Makefile +++ b/drivers/media/platform/Makefile @@ -55,4 +55,6 @@ obj-$(CONFIG_VIDEO_AM437X_VPFE) += am437x/ obj-$(CONFIG_VIDEO_XILINX) += xilinx/ +obj-$(CONFIG_VIDEO_ATMEL_ISC) += atmel/ + ccflags-y += -I$(srctree)/drivers/media/i2c diff --git a/drivers/media/platform/atmel/Kconfig b/drivers/media/platform/atmel/Kconfig new file mode 100644 index 0000000..867dca2 --- /dev/null +++ b/drivers/media/platform/atmel/Kconfig @@ -0,0 +1,9 @@ +config VIDEO_ATMEL_ISC + tristate "ATMEL Image Sensor Controller (ISC) support" + depends on VIDEO_V4L2 && COMMON_CLK && VIDEO_V4L2_SUBDEV_API && HAS_DMA + depends on ARCH_AT91 || COMPILE_TEST + select VIDEOBUF2_DMA_CONTIG + select REGMAP_MMIO + help + This module makes the ATMEL Image Sensor Controller available + as a v4l2 device. \ No newline at end of file diff --git a/drivers/media/platform/atmel/Makefile b/drivers/media/platform/atmel/Makefile new file mode 100644 index 0000000..9d7c999 --- /dev/null +++ b/drivers/media/platform/atmel/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_VIDEO_ATMEL_ISC) += atmel-isc.o diff --git a/drivers/media/platform/atmel/atmel-isc-regs.h b/drivers/media/platform/atmel/atmel-isc-regs.h new file mode 100644 index 0000000..dda9396 --- /dev/null +++ b/drivers/media/platform/atmel/atmel-isc-regs.h @@ -0,0 +1,276 @@ +#ifndef __ATMEL_ISC_REGS_H +#define __ATMEL_ISC_REGS_H + +#include + +/* ISC Control Enable Register 0 */ +#define ISC_CTRLEN 0x00000000 + +#define ISC_CTRLEN_CAPTURE BIT(0) +#define ISC_CTRLEN_CAPTURE_MASK BIT(0) + +#define ISC_CTRLEN_UPPRO BIT(1) +#define ISC_CTRLEN_UPPRO_MASK BIT(1) + +#define ISC_CTRLEN_HISREQ BIT(2) +#define ISC_CTRLEN_HISREQ_MASK BIT(2) + +#define ISC_CTRLEN_HISCLR BIT(3) +#define ISC_CTRLEN_HISCLR_MASK BIT(3) + +/* ISC Control Disable Register 0 */ +#define ISC_CTRLDIS 0x00000004 + +#define ISC_CTRLDIS_DISABLE BIT(0) +#define ISC_CTRLDIS_DISABLE_MASK BIT(0) + +#define ISC_CTRLDIS_SWRST BIT(8) +#define ISC_CTRLDIS_SWRST_MASK BIT(8) + +/* ISC Control Status Register 0 */ +#define ISC_CTRLSR 0x00000008 + +#define ISC_CTRLSR_CAPTURE BIT(0) +#define ISC_CTRLSR_UPPRO BIT(1) +#define ISC_CTRLSR_HISREQ BIT(2) +#define ISC_CTRLSR_FIELD BIT(4) +#define ISC_CTRLSR_SIP BIT(31) + +/* ISC Parallel Front End Configuration 0 Register */ +#define ISC_PFE_CFG0 0x0000000c + +#define ISC_PFE_CFG0_HPOL_LOW BIT(0) +#define ISC_PFE_CFG0_HPOL_HIGH 0x0 +#define ISC_PFE_CFG0_HPOL_MASK BIT(0) + +#define ISC_PFE_CFG0_VPOL_LOW BIT(1) +#define ISC_PFE_CFG0_VPOL_HIGH 0x0 +#define ISC_PFE_CFG0_VPOL_MASK BIT(1) + +#define ISC_PFE_CFG0_PPOL_LOW BIT(2) +#define ISC_PFE_CFG0_PPOL_HIGH 0x0 +#define ISC_PFE_CFG0_PPOL_MASK BIT(2) + +#define ISC_PFE_CFG0_MODE_PROGRESSIVE 0x0 +#define ISC_PFE_CFG0_MODE_MASK GENMASK(6, 4) + +#define ISC_PFE_CFG0_BPS_EIGHT (0x4 << 28) +#define ISC_PFG_CFG0_BPS_NINE (0x3 << 28) +#define ISC_PFG_CFG0_BPS_TEN (0x2 << 28) +#define ISC_PFG_CFG0_BPS_ELEVEN (0x1 << 28) +#define ISC_PFG_CFG0_BPS_TWELVE 0x0 +#define ISC_PFE_CFG0_BPS_MASK GENMASK(30, 28) + +/* ISC Clock Enable Register */ +#define ISC_CLKEN 0x00000018 +#define ISC_CLKEN_EN 0x1 +#define ISC_CLKEN_EN_SHIFT(n) (n) +#define ISC_CLKEN_EN_MASK(n) BIT(n) + +/* ISC Clock Disable Register */ +#define ISC_CLKDIS 0x0000001c +#define ISC_CLKDIS_DIS 0x1 +#define ISC_CLKDIS_DIS_SHIFT(n) (n) +#define ISC_CLKDIS_DIS_MASK(n) BIT(n) + +/* ISC Clock Status Register */ +#define ISC_CLKSR 0x00000020 +#define ISC_CLKSR_CLK_MASK(n) BIT(n) +#define ISC_CLKSR_SIP_PROGRESS BIT(31) + +/* ISC Clock Configuration Register */ +#define ISC_CLKCFG 0x00000024 +#define ISC_CLKCFG_DIV_SHIFT(n) ((n)*16) +#define ISC_CLKCFG_DIV_MASK(n) GENMASK(((n)*16 + 7), (n)*16) +#define ISC_CLKCFG_SEL_SHIFT(n) ((n)*16 + 8) +#define ISC_CLKCFG_SEL_MASK(n) GENMASK(((n)*17 + 8), ((n)*16 + 8)) + +/* ISC Interrupt Enable Register */ +#define ISC_INTEN 0x00000028 + +#define ISC_INTEN_DDONE BIT(8) +#define ISC_INTEN_DDONE_MASK BIT(8) + +/* ISC Interrupt Disable Register */ +#define ISC_INTDIS 0x0000002c + +#define ISC_INTDIS_DDONE BIT(8) +#define ISC_INTDIS_DDONE_MASK BIT(8) + +/* ISC Interrupt Mask Register */ +#define ISC_INTMASK 0x00000030 + +/* ISC Interrupt Status Register */ +#define ISC_INTSR 0x00000034 + +#define ISC_INTSR_DDONE BIT(8) + +/* ISC White Balance Control Register */ +#define ISC_WB_CTRL 0x00000058 + +#define ISC_WB_CTRL_EN BIT(0) +#define ISC_WB_CTRL_DIS 0x0 +#define ISC_WB_CTRL_MASK BIT(0) + +/* ISC White Balance Configuration Register */ +#define ISC_WB_CFG 0x0000005c + +#define ISC_WB_CFG_BAYCFG_GRGR 0x0 +#define ISC_WB_CFG_BAYCFG_RGRG 0x1 +#define ISC_WB_CFG_BAYCFG_GBGB 0x2 +#define ISC_WB_CFG_BAYCFG_BGBG 0x3 +#define ISC_WB_CFG_BAYCFG_MASK GENMASK(1, 0) + +/* ISC Color Filter Array Control Register */ +#define ISC_CFA_CTRL 0x00000070 + +#define ISC_CFA_CTRL_EN BIT(0) +#define ISC_CFA_CTRL_DIS 0x0 +#define ISC_CFA_CTRL_MASK BIT(0) + +/* ISC Color Filter Array Configuration Register */ +#define ISC_CFA_CFG 0x00000074 + +#define ISC_CFA_CFG_BAY_GRGR 0x0 +#define ISC_CFA_CFG_BAY_RGRG 0x1 +#define ISC_CFA_CFG_BAY_GBGB 0x2 +#define ISC_CFA_CFG_BAY_BGBG 0x3 +#define ISC_CFA_CFG_BAY_MASK GENMASK(1, 0) + +/* ISC Color Correction Control Register */ +#define ISC_CC_CTRL 0x00000078 + +#define ISC_CC_CTRL_EN BIT(0) +#define ISC_CC_CTRL_DIS 0x0 +#define ISC_CC_CTRL_MASK BIT(0) + +/* ISC Gamma Correction Control Register */ +#define ISC_GAM_CTRL 0x00000094 + +#define ISC_GAM_CTRL_EN BIT(0) +#define ISC_GAM_CTRL_DIS 0x0 +#define ISC_GAM_CTRL_MASK BIT(0) + +#define ISC_GAM_CTRL_B_EN BIT(1) +#define ISC_GAM_CTRL_B_DIS 0x0 +#define ISC_GAM_CTRL_B_MASK BIT(1) + +#define ISC_GAM_CTRL_G_EN BIT(2) +#define ISC_GAM_CTRL_G_DIS 0x0 +#define ISC_GAM_CTRL_G_MASK BIT(2) + +#define ISC_GAM_CTRL_R_EN BIT(3) +#define ISC_GAM_CTRL_R_DIS 0x0 +#define ISC_GAM_CTRL_R_MASK BIT(3) + +#define ISC_GAM_CTRL_ALL_CHAN_MASK (ISC_GAM_CTRL_B_MASK | \ + ISC_GAM_CTRL_G_MASK | \ + ISC_GAM_CTRL_R_MASK) + +/* Color Space Conversion Control Register */ +#define ISC_CSC_CTRL 0x00000398 + +#define ISC_CSC_CTRL_EN BIT(0) +#define ISC_CSC_CTRL_DIS 0x0 +#define ISC_CSC_CTRL_MASK BIT(0) + +/* Contrast And Brightness Control Register */ +#define ISC_CBC_CTRL 0x000003b4 + +#define ISC_CBC_CTRL_EN BIT(0) +#define ISC_CBC_CTRL_DIS 0x0 +#define ISC_CBC_CTRL_MASK BIT(0) + +/* Subsampling 4:4:4 to 4:2:2 Control Register */ +#define ISC_SUB422_CTRL 0x000003c4 + +#define ISC_SUB422_CTRL_EN BIT(0) +#define ISC_SUB422_CTRL_DIS 0x0 +#define ISC_SUB422_CTRL_MASK BIT(0) + +/* Subsampling 4:2:2 to 4:2:0 Control Register */ +#define ISC_SUB420_CTRL 0x000003cc + +#define ISC_SUB420_CTRL_EN BIT(0) +#define ISC_SUB420_CTRL_DIS 0x0 +#define ISC_SUB420_CTRL_MASK BIT(0) + +#define ISC_SUB420_CTRL_FILTER_PROG 0x0 +#define ISC_SUB420_CTRL_FILTER_INTER BIT(4) +#define ISC_SUB420_CTRL_FILTER_MASK BIT(4) + +/* Rounding, Limiting and Packing Configuration Register */ +#define ISC_RLP_CFG 0x000003d0 + +#define ISC_RLP_CFG_MODE_DAT8 0x0 +#define ISC_RLP_CFG_MODE_DAT9 0x1 +#define ISC_RLP_CFG_MODE_DAT10 0x2 +#define ISC_RLP_CFG_MODE_DAT11 0x3 +#define ISC_RLP_CFG_MODE_DAT12 0x4 +#define ISC_RLP_CFG_MODE_DATY8 0x5 +#define ISC_RLP_CFG_MODE_DATY10 0x6 +#define ISC_RLP_CFG_MODE_ARGB444 0x7 +#define ISC_RLP_CFG_MODE_ARGB555 0x8 +#define ISC_RLP_CFG_MODE_RGB565 0x9 +#define ISC_RLP_CFG_MODE_ARGB32 0xa +#define ISC_RLP_CFG_MODE_YYCC 0xb +#define ISC_RLP_CFG_MODE_YYCC_LIMITED 0xc +#define ISC_RLP_CFG_MODE_MASK GENMASK(3, 0) + +/* DMA Configuration Register */ +#define ISC_DCFG 0x000003e0 +#define ISC_DCFG_IMODE_PACKED8 0x0 +#define ISC_DCFG_IMODE_PACKED16 0x1 +#define ISC_DCFG_IMODE_PACKED32 0x2 +#define ISC_DCFG_IMODE_YC422SP 0x3 +#define ISC_DCFG_IMODE_YC422P 0x4 +#define ISC_DCFG_IMODE_YC420SP 0x5 +#define ISC_DCFG_IMODE_YC420P 0x6 +#define ISC_DCFG_IMODE_MASK GENMASK(2, 0) + +#define ISC_DCFG_YMBSIZE_SINGLE 0x0 +#define ISC_DCFG_YMBSIZE_BEATS4 (0x1 << 4) +#define ISC_DCFG_YMBSIZE_BEATS8 (0x2 << 4) +#define ISC_DCFG_YMBSIZE_BEATS16 (0x3 << 4) +#define ISC_DCFG_YMBSIZE_MASK GENMASK(5, 4) + +#define ISC_DCFG_CMBSIZE_SINGLE 0x0 +#define ISC_DCFG_CMBSIZE_BEATS4 (0x1 << 8) +#define ISC_DCFG_CMBSIZE_BEATS8 (0x2 << 8) +#define ISC_DCFG_CMBSIZE_BEATS16 (0x3 << 8) +#define ISC_DCFG_CMBSIZE_MASK GENMASK(9, 8) + +/* DMA Control Register */ +#define ISC_DCTRL 0x000003e4 + +#define ISC_DCTRL_DE_EN BIT(0) +#define ISC_DCTRL_DE_DIS 0x0 +#define ISC_DCTRL_DE_MASK BIT(0) + +#define ISC_DCTRL_DVIEW_PACKED 0x0 +#define ISC_DCTRL_DVIEW_SEMIPLANAR (0x1 << 1) +#define ISC_DCTRL_DVIEW_PLANAR (0x2 << 1) +#define ISC_DCTRL_DVIEW_MASK GENMASK(2, 1) + +#define ISC_DCTRL_IE_IS 0x0 +#define ISC_DCTRL_IE_NOT BIT(4) +#define ISC_DCTRL_IE_MASK BIT(4) + +#define ISC_DCTRL_WB_EN BIT(5) +#define ISC_DCTRL_WB_DIS 0x0 +#define ISC_DCTRL_WB_MASK BIT(5) + +#define ISC_DCTRL_DESC_IS_DONE BIT(7) +#define ISC_DCTRL_DESC_NOT_DONE 0x0 +#define ISC_DCTRL_DESC_MASK BIT(7) + +/* DMA Descriptor Address Register */ +#define ISC_DNDA 0x000003e8 + +/* DMA Address 0 Register */ +#define ISC_DAD0 0x000003ec + +/* DMA Stride 0 Register */ +#define ISC_DST0 0x000003f0 + +#endif diff --git a/drivers/media/platform/atmel/atmel-isc.c b/drivers/media/platform/atmel/atmel-isc.c new file mode 100644 index 0000000..178f647 --- /dev/null +++ b/drivers/media/platform/atmel/atmel-isc.c @@ -0,0 +1,1583 @@ +/* + * Atmel Image Sensor Controller (ISC) driver + * + * Copyright (C) 2016 Atmel + * + * Author: Songjun Wu + * + * This program is free software; you may 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. + * + * Sensor-->PFE-->WB-->CFA-->CC-->GAM-->CSC-->CBC-->SUB-->RLP-->DMA + * + * ISC video pipeline integrates the following submodules: + * PFE: Parallel Front End to sample the camera sensor input stream + * WB: Programmable white balance in the Bayer domain + * CFA: Color filter array interpolation module + * CC: Programmable color correction + * GAM: Gamma correction + * CSC: Programmable color space conversion + * CBC: Contrast and Brightness control + * SUB: This module performs YCbCr444 to YCbCr420 chrominance subsampling + * RLP: This module performs rounding, range limiting + * and packing of the incoming data + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include + +#include "atmel-isc-regs.h" + +#define ATMEL_ISC_NAME "atmel_isc" + +#define ISC_MAX_SUPPORT_WIDTH 2592 +#define ISC_MAX_SUPPORT_HEIGHT 1944 + +#define ISC_ISPCK_SOURCE_MAX 2 +#define ISC_MCK_SOURCE_MAX 3 +#define ISC_CLK_MAX_DIV 255 + +enum isc_clk_id { + ISC_ISPCK = 0, + ISC_MCK = 1, +}; + +struct isc_clk { + struct clk_hw hw; + struct clk *clk; + struct regmap *regmap; + spinlock_t *lock; + enum isc_clk_id id; + u32 div; + u8 parent_id; + + struct isc_device *isc; +}; + +#define to_isc_clk(hw) container_of(hw, struct isc_clk, hw) + +struct isc_buffer { + struct vb2_v4l2_buffer vb; + struct list_head list; +}; + +struct isc_subdev_entity { + struct v4l2_subdev *sd; + struct v4l2_async_subdev *asd; + struct v4l2_async_notifier notifier; + struct v4l2_subdev_pad_config *config; + + u32 pfe_cfg0; + + struct list_head list; +}; + +/* + * struct isc_format - ISC media bus format information + * @fourcc: Fourcc code for this format + * @isc_mbus_code: V4L2 media bus format code if ISC is preferred + * @sd_mbus_code: V4L2 media bus format code if subdev is preferred + * @bpp: Bytes per pixel (when stored in memory) + * @reg_sd_bps: reg value for bits per sample if subdev is preferred + * (when transferred over a bus) + * @reg_isc_bps: reg value for bits per sample if ISC is preferred + * (when transferred over a bus) + * @pipeline: pipeline switch if ISC is preferred + * @isc_support: ISC can convert raw format to this format + * @sd_support: Subdev supports this format + */ +struct isc_format { + u32 fourcc; + u32 isc_mbus_code; + u32 sd_mbus_code; + + u8 bpp; + + u32 reg_sd_bps; + u32 reg_isc_bps; + + u32 reg_wb_cfg; + u32 reg_cfa_cfg; + u32 reg_rlp_mode; + u32 reg_dcfg_imode; + u32 reg_dctrl_dview; + + u32 pipeline; + + bool isc_support; + bool sd_support; +}; + +struct isc_device { + struct regmap *regmap; + struct clk *hclock; + struct clk *ispck; + struct isc_clk isc_clks[2]; + spinlock_t clk_lock; + + struct device *dev; + struct v4l2_device v4l2_dev; + struct video_device video_dev; + + struct vb2_queue vb2_vidq; + struct vb2_alloc_ctx *alloc_ctx; + + spinlock_t dma_queue_lock; + struct list_head dma_queue; + struct isc_buffer *cur_frm; + unsigned int sequence; + bool stop; + struct completion comp; + + struct v4l2_format fmt; + + struct isc_format **user_formats; + unsigned int num_user_formats; + const struct isc_format *current_fmt; + u32 sensor_preferred; + + struct mutex lock; + + struct isc_subdev_entity *current_subdev; + struct list_head subdev_entities; +}; + +struct reg_mask { + u32 reg; + u32 mask; +}; + +/* WB-->CFA-->CC-->GAM-->CSC-->CBC-->SUB422-->SUB420 */ +const struct reg_mask pipeline_regs[] = { + { ISC_WB_CTRL, ISC_WB_CTRL_MASK }, + { ISC_CFA_CTRL, ISC_CFA_CTRL_MASK }, + { ISC_CC_CTRL, ISC_CC_CTRL_MASK }, + { ISC_GAM_CTRL, ISC_GAM_CTRL_MASK | ISC_GAM_CTRL_ALL_CHAN_MASK }, + { ISC_CSC_CTRL, ISC_CSC_CTRL_MASK }, + { ISC_CBC_CTRL, ISC_CBC_CTRL_MASK }, + { ISC_SUB422_CTRL, ISC_SUB422_CTRL_MASK }, + { ISC_SUB420_CTRL, ISC_SUB420_CTRL_MASK } +}; + +#define RAW_FMT_INDEX_START 0 +#define RAW_FMT_INDEX_END 11 +#define ISC_FMT_INDEX_START 12 +#define ISC_FMT_INDEX_END 12 + +/* + * index(0~11): raw formats. + * index(12~12): the formats which can be converted from raw format by ISC. + * index(): the formats which can only be provided by subdev. + */ +static struct isc_format isc_formats[] = { +{V4L2_PIX_FMT_SBGGR8, MEDIA_BUS_FMT_SBGGR8_1X8, MEDIA_BUS_FMT_SBGGR8_1X8, +1, ISC_PFE_CFG0_BPS_EIGHT, ISC_PFE_CFG0_BPS_EIGHT, ISC_WB_CFG_BAYCFG_BGBG, +ISC_CFA_CFG_BAY_BGBG, ISC_RLP_CFG_MODE_DAT8, ISC_DCFG_IMODE_PACKED8, +ISC_DCTRL_DVIEW_PACKED, 0x0, false, false}, +{V4L2_PIX_FMT_SGBRG8, MEDIA_BUS_FMT_SGBRG8_1X8, MEDIA_BUS_FMT_SGBRG8_1X8, +1, ISC_PFE_CFG0_BPS_EIGHT, ISC_PFE_CFG0_BPS_EIGHT, ISC_WB_CFG_BAYCFG_GBGB, +ISC_CFA_CFG_BAY_GBGB, ISC_RLP_CFG_MODE_DAT8, ISC_DCFG_IMODE_PACKED8, +ISC_DCTRL_DVIEW_PACKED, 0x0, false, false}, +{V4L2_PIX_FMT_SGRBG8, MEDIA_BUS_FMT_SGRBG8_1X8, MEDIA_BUS_FMT_SGRBG8_1X8, +1, ISC_PFE_CFG0_BPS_EIGHT, ISC_PFE_CFG0_BPS_EIGHT, ISC_WB_CFG_BAYCFG_GRGR, +ISC_CFA_CFG_BAY_GRGR, ISC_RLP_CFG_MODE_DAT8, ISC_DCFG_IMODE_PACKED8, +ISC_DCTRL_DVIEW_PACKED, 0x0, false, false}, +{V4L2_PIX_FMT_SRGGB8, MEDIA_BUS_FMT_SRGGB8_1X8, MEDIA_BUS_FMT_SRGGB8_1X8, +1, ISC_PFE_CFG0_BPS_EIGHT, ISC_PFE_CFG0_BPS_EIGHT, ISC_WB_CFG_BAYCFG_RGRG, +ISC_CFA_CFG_BAY_RGRG, ISC_RLP_CFG_MODE_DAT8, ISC_DCFG_IMODE_PACKED8, +ISC_DCTRL_DVIEW_PACKED, 0x0, false, false}, + +{V4L2_PIX_FMT_SBGGR10, MEDIA_BUS_FMT_SBGGR10_1X10, MEDIA_BUS_FMT_SBGGR10_1X10, +2, ISC_PFG_CFG0_BPS_TEN, ISC_PFG_CFG0_BPS_TEN, ISC_WB_CFG_BAYCFG_BGBG, +ISC_CFA_CFG_BAY_BGBG, ISC_RLP_CFG_MODE_DAT10, ISC_DCFG_IMODE_PACKED16, +ISC_DCTRL_DVIEW_PACKED, 0x0, false, false}, +{V4L2_PIX_FMT_SGBRG10, MEDIA_BUS_FMT_SGBRG10_1X10, MEDIA_BUS_FMT_SGBRG10_1X10, +2, ISC_PFG_CFG0_BPS_TEN, ISC_PFG_CFG0_BPS_TEN, ISC_WB_CFG_BAYCFG_GBGB, +ISC_CFA_CFG_BAY_GBGB, ISC_RLP_CFG_MODE_DAT10, ISC_DCFG_IMODE_PACKED16, +ISC_DCTRL_DVIEW_PACKED, 0x0, false, false}, +{V4L2_PIX_FMT_SGRBG10, MEDIA_BUS_FMT_SGRBG10_1X10, MEDIA_BUS_FMT_SGRBG10_1X10, +2, ISC_PFG_CFG0_BPS_TEN, ISC_PFG_CFG0_BPS_TEN, ISC_WB_CFG_BAYCFG_GRGR, +ISC_CFA_CFG_BAY_GRGR, ISC_RLP_CFG_MODE_DAT10, ISC_DCFG_IMODE_PACKED16, +ISC_DCTRL_DVIEW_PACKED, 0x0, false, false}, +{V4L2_PIX_FMT_SRGGB10, MEDIA_BUS_FMT_SRGGB10_1X10, MEDIA_BUS_FMT_SRGGB10_1X10, +2, ISC_PFG_CFG0_BPS_TEN, ISC_PFG_CFG0_BPS_TEN, ISC_WB_CFG_BAYCFG_RGRG, +ISC_CFA_CFG_BAY_RGRG, ISC_RLP_CFG_MODE_DAT10, ISC_DCFG_IMODE_PACKED16, +ISC_DCTRL_DVIEW_PACKED, 0x0, false, false}, + +{V4L2_PIX_FMT_SBGGR12, MEDIA_BUS_FMT_SBGGR12_1X12, MEDIA_BUS_FMT_SBGGR12_1X12, +2, ISC_PFG_CFG0_BPS_TWELVE, ISC_PFG_CFG0_BPS_TWELVE, ISC_WB_CFG_BAYCFG_BGBG, +ISC_CFA_CFG_BAY_BGBG, ISC_RLP_CFG_MODE_DAT12, ISC_DCFG_IMODE_PACKED16, +ISC_DCTRL_DVIEW_PACKED, 0x0, false, false}, +{V4L2_PIX_FMT_SGBRG12, MEDIA_BUS_FMT_SGBRG12_1X12, MEDIA_BUS_FMT_SGBRG12_1X12, +2, ISC_PFG_CFG0_BPS_TWELVE, ISC_PFG_CFG0_BPS_TWELVE, ISC_WB_CFG_BAYCFG_GBGB, +ISC_CFA_CFG_BAY_GBGB, ISC_RLP_CFG_MODE_DAT12, ISC_DCFG_IMODE_PACKED16, +ISC_DCTRL_DVIEW_PACKED, 0x0, false, false}, +{V4L2_PIX_FMT_SGRBG12, MEDIA_BUS_FMT_SGRBG12_1X12, MEDIA_BUS_FMT_SGRBG12_1X12, +2, ISC_PFG_CFG0_BPS_TWELVE, ISC_PFG_CFG0_BPS_TWELVE, ISC_WB_CFG_BAYCFG_GRGR, +ISC_CFA_CFG_BAY_GRGR, ISC_RLP_CFG_MODE_DAT12, ISC_DCFG_IMODE_PACKED16, +ISC_DCTRL_DVIEW_PACKED, 0x0, false, false}, +{V4L2_PIX_FMT_SRGGB12, MEDIA_BUS_FMT_SRGGB12_1X12, MEDIA_BUS_FMT_SRGGB12_1X12, +2, ISC_PFG_CFG0_BPS_TWELVE, ISC_PFG_CFG0_BPS_TWELVE, ISC_WB_CFG_BAYCFG_RGRG, +ISC_CFA_CFG_BAY_RGRG, ISC_RLP_CFG_MODE_DAT12, ISC_DCFG_IMODE_PACKED16, +ISC_DCTRL_DVIEW_PACKED, 0x0, false, false}, + +{V4L2_PIX_FMT_YUYV, MEDIA_BUS_FMT_YUYV8_2X8, MEDIA_BUS_FMT_YUYV8_2X8, +2, ISC_PFE_CFG0_BPS_EIGHT, ISC_PFE_CFG0_BPS_EIGHT, ISC_WB_CFG_BAYCFG_BGBG, +ISC_CFA_CFG_BAY_BGBG, ISC_RLP_CFG_MODE_DAT8, ISC_DCFG_IMODE_PACKED8, +ISC_DCTRL_DVIEW_PACKED, 0x7f, false, false}, +}; + +static int isc_clk_enable(struct clk_hw *hw) +{ + struct isc_clk *isc_clk = to_isc_clk(hw); + u32 id = isc_clk->id; + struct regmap *regmap = isc_clk->regmap; + unsigned long flags; + + dev_dbg(isc_clk->isc->dev, "ISC CLK: %s, div = %d, parent id = %d\n", + __func__, isc_clk->div, isc_clk->parent_id); + + spin_lock_irqsave(isc_clk->lock, flags); + + regmap_update_bits(regmap, ISC_CLKCFG, + ISC_CLKCFG_DIV_MASK(id) | ISC_CLKCFG_SEL_MASK(id), + (isc_clk->div << ISC_CLKCFG_DIV_SHIFT(id)) | + (isc_clk->parent_id << ISC_CLKCFG_SEL_SHIFT(id))); + + regmap_update_bits(regmap, ISC_CLKEN, + ISC_CLKEN_EN_MASK(id), + ISC_CLKEN_EN << ISC_CLKEN_EN_SHIFT(id)); + + spin_unlock_irqrestore(isc_clk->lock, flags); + + return 0; +} + +static void isc_clk_disable(struct clk_hw *hw) +{ + struct isc_clk *isc_clk = to_isc_clk(hw); + u32 id = isc_clk->id; + unsigned long flags; + + spin_lock_irqsave(isc_clk->lock, flags); + + regmap_update_bits(isc_clk->regmap, ISC_CLKDIS, + ISC_CLKDIS_DIS_MASK(id), + ISC_CLKDIS_DIS << ISC_CLKDIS_DIS_SHIFT(id)); + + spin_unlock_irqrestore(isc_clk->lock, flags); +} + +static int isc_clk_is_enabled(struct clk_hw *hw) +{ + struct isc_clk *isc_clk = to_isc_clk(hw); + unsigned long flags; + u32 status; + + spin_lock_irqsave(isc_clk->lock, flags); + regmap_read(isc_clk->regmap, ISC_CLKSR, &status); + spin_unlock_irqrestore(isc_clk->lock, flags); + + return status & ISC_CLKSR_CLK_MASK(isc_clk->id) ? 1 : 0; +} + +static unsigned long +isc_clk_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) +{ + struct isc_clk *isc_clk = to_isc_clk(hw); + + return DIV_ROUND_CLOSEST(parent_rate, isc_clk->div + 1); +} + +static int isc_clk_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) +{ + struct isc_clk *isc_clk = to_isc_clk(hw); + long best_rate = -EINVAL; + int best_diff = -1; + unsigned int i, div; + + for (i = 0; i < clk_hw_get_num_parents(hw); i++) { + struct clk_hw *parent; + unsigned long parent_rate; + + parent = clk_hw_get_parent_by_index(hw, i); + if (!parent) + continue; + + parent_rate = clk_hw_get_rate(parent); + if (!parent_rate) + continue; + + for (div = 1; div < ISC_CLK_MAX_DIV + 2; div++) { + unsigned long rate; + int diff; + + rate = DIV_ROUND_CLOSEST(parent_rate, div); + diff = abs(req->rate - rate); + + if (best_diff < 0 || best_diff > diff) { + best_rate = rate; + best_diff = diff; + req->best_parent_rate = parent_rate; + req->best_parent_hw = parent; + } + + if (!best_diff || rate < req->rate) + break; + } + + if (!best_diff) + break; + } + + dev_dbg(isc_clk->isc->dev, + "ISC CLK: %s, best_rate = %ld, parent clk: %s @ %ld\n", + __func__, best_rate, + __clk_get_name((req->best_parent_hw)->clk), + req->best_parent_rate); + + if (best_rate < 0) + return best_rate; + + req->rate = best_rate; + + return 0; +} + +static int isc_clk_set_parent(struct clk_hw *hw, u8 index) +{ + struct isc_clk *isc_clk = to_isc_clk(hw); + + if (index >= clk_hw_get_num_parents(hw)) + return -EINVAL; + + isc_clk->parent_id = index; + + return 0; +} + +static u8 isc_clk_get_parent(struct clk_hw *hw) +{ + struct isc_clk *isc_clk = to_isc_clk(hw); + + return isc_clk->parent_id; +} + +static int isc_clk_set_rate(struct clk_hw *hw, + unsigned long rate, + unsigned long parent_rate) +{ + struct isc_clk *isc_clk = to_isc_clk(hw); + u32 div; + + if (!rate) + return -EINVAL; + + div = DIV_ROUND_CLOSEST(parent_rate, rate); + if ((div > (ISC_CLK_MAX_DIV + 1)) || !div) + return -EINVAL; + + isc_clk->div = div - 1; + + return 0; +} + +static const struct clk_ops isc_clk_ops = { + .enable = isc_clk_enable, + .disable = isc_clk_disable, + .is_enabled = isc_clk_is_enabled, + .recalc_rate = isc_clk_recalc_rate, + .determine_rate = isc_clk_determine_rate, + .set_parent = isc_clk_set_parent, + .get_parent = isc_clk_get_parent, + .set_rate = isc_clk_set_rate, +}; + +static int isc_clk_register(struct isc_device *isc, struct device_node *np) +{ + struct regmap *regmap = isc->regmap; + struct isc_clk *isc_clk; + struct clk_init_data init; + const char *clk_name = np->name; + const char **parent_names; + u32 id; + int num_parents, source_max, ret = 0; + + if (of_property_read_u32(np, "reg", &id)) + return -EINVAL; + + switch (id) { + case ISC_ISPCK: + source_max = ISC_ISPCK_SOURCE_MAX; + break; + case ISC_MCK: + source_max = ISC_MCK_SOURCE_MAX; + break; + default: + return -EINVAL; + } + + num_parents = of_clk_get_parent_count(np); + if (num_parents < 1 || num_parents > source_max) + return -EINVAL; + + parent_names = kcalloc(num_parents, sizeof(char *), GFP_KERNEL); + if (!parent_names) + return -ENOMEM; + + of_clk_parent_fill(np, parent_names, num_parents); + + init.parent_names = parent_names; + init.num_parents = num_parents; + init.name = clk_name; + init.ops = &isc_clk_ops; + init.flags = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE; + + isc_clk = &isc->isc_clks[id]; + isc_clk->hw.init = &init; + isc_clk->regmap = regmap; + isc_clk->lock = &isc->clk_lock; + isc_clk->id = id; + isc_clk->isc = isc; + + isc_clk->clk = clk_register(NULL, &isc_clk->hw); + if (!IS_ERR(isc_clk->clk)) + of_clk_add_provider(np, of_clk_src_simple_get, isc_clk->clk); + else { + dev_err(isc->dev, "%s: clock register fail\n", clk_name); + ret = PTR_ERR(isc_clk->clk); + goto free_parent_names; + } + +free_parent_names: + kfree(parent_names); + return ret; +} + +static int isc_clk_init(struct isc_device *isc) +{ + struct device_node *np = of_get_child_by_name(isc->dev->of_node, + "clk-in-isc"); + struct device_node *childnp; + unsigned int i; + int ret; + + if (!np) { + dev_err(isc->dev, "No clock node\n"); + return -ENOENT; + } + + for (i = 0; i < ARRAY_SIZE(isc->isc_clks); i++) + isc->isc_clks[i].clk = ERR_PTR(-EINVAL); + + spin_lock_init(&isc->clk_lock); + for_each_child_of_node(np, childnp) { + ret = isc_clk_register(isc, childnp); + if (ret) + return ret; + } + + return 0; +} + +static void isc_clk_cleanup(struct isc_device *isc) +{ + struct device_node *np = of_get_child_by_name(isc->dev->of_node, + "clk_in_isc"); + struct device_node *childnp; + unsigned int i; + + if (!np) + return; + + for_each_child_of_node(np, childnp) + of_clk_del_provider(childnp); + + for (i = 0; i < ARRAY_SIZE(isc->isc_clks); i++) { + struct isc_clk *isc_clk = &isc->isc_clks[i]; + + if (!IS_ERR(isc_clk->clk)) + clk_unregister(isc_clk->clk); + } +} + +static int isc_queue_setup(struct vb2_queue *vq, + unsigned int *nbuffers, unsigned int *nplanes, + unsigned int sizes[], void *alloc_ctxs[]) +{ + struct isc_device *isc = vb2_get_drv_priv(vq); + unsigned int size = isc->fmt.fmt.pix.sizeimage; + + alloc_ctxs[0] = isc->alloc_ctx; + + if (*nplanes) + return sizes[0] < size ? -EINVAL : 0; + + *nplanes = 1; + sizes[0] = size; + + return 0; +} + +static int isc_buffer_prepare(struct vb2_buffer *vb) +{ + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + struct isc_device *isc = vb2_get_drv_priv(vb->vb2_queue); + unsigned long size = isc->fmt.fmt.pix.sizeimage; + + if (vb2_plane_size(vb, 0) < size) { + v4l2_err(&isc->v4l2_dev, "buffer too small (%lu < %lu)\n", + vb2_plane_size(vb, 0), size); + return -EINVAL; + } + + vb2_set_plane_payload(vb, 0, size); + + vbuf->field = isc->fmt.fmt.pix.field; + + return 0; +} + +static inline void isc_start_dma(struct regmap *regmap, + struct isc_buffer *frm, u32 dview) +{ + dma_addr_t addr; + + addr = vb2_dma_contig_plane_dma_addr(&frm->vb.vb2_buf, 0); + + regmap_write(regmap, ISC_DCTRL, dview | ISC_DCTRL_IE_IS); + regmap_write(regmap, ISC_DAD0, addr); + regmap_update_bits(regmap, ISC_CTRLEN, + ISC_CTRLEN_CAPTURE_MASK, ISC_CTRLEN_CAPTURE); +} + +static inline bool sensor_is_preferred(const u32 sensor_preferred, + const struct isc_format *isc_fmt) +{ + if ((sensor_preferred && isc_fmt->sd_support) || + !isc_fmt->isc_support) + return true; + else + return false; +} + +static void isc_set_pipeline(struct regmap *regmap, u32 pipeline) +{ + const struct reg_mask *reg = &pipeline_regs[0]; + u32 val; + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(pipeline_regs); i++) { + if (pipeline & BIT(i)) + val = reg->mask; + else + val = 0; + + regmap_update_bits(regmap, reg->reg, reg->mask, val); + + reg++; + } +} + +static int isc_configure(struct isc_device *isc) +{ + struct regmap *regmap = isc->regmap; + const struct isc_format *current_fmt = isc->current_fmt; + struct isc_subdev_entity *subdev = isc->current_subdev; + u32 pipeline, val, mask; + int counter = 10; + + if (sensor_is_preferred(isc->sensor_preferred, current_fmt)) { + val = current_fmt->reg_sd_bps; + pipeline = 0x0; + } else { + val = current_fmt->reg_isc_bps; + pipeline = current_fmt->pipeline; + + regmap_update_bits(regmap, ISC_WB_CFG, ISC_WB_CFG_BAYCFG_MASK, + current_fmt->reg_wb_cfg); + regmap_update_bits(regmap, ISC_CFA_CFG, ISC_CFA_CFG_BAY_MASK, + current_fmt->reg_cfa_cfg); + } + + val |= subdev->pfe_cfg0 | ISC_PFE_CFG0_MODE_PROGRESSIVE; + mask = ISC_PFE_CFG0_BPS_MASK | ISC_PFE_CFG0_HPOL_MASK | + ISC_PFE_CFG0_VPOL_MASK | ISC_PFE_CFG0_PPOL_MASK | + ISC_PFE_CFG0_MODE_MASK; + + regmap_update_bits(regmap, ISC_PFE_CFG0, mask, val); + + regmap_update_bits(regmap, ISC_RLP_CFG, ISC_RLP_CFG_MODE_MASK, + current_fmt->reg_rlp_mode); + + regmap_update_bits(regmap, ISC_DCFG, ISC_DCFG_IMODE_MASK, + current_fmt->reg_dcfg_imode); + + isc_set_pipeline(regmap, pipeline); + + /* Update profile */ + regmap_update_bits(regmap, ISC_CTRLEN, + ISC_CTRLEN_UPPRO_MASK, ISC_CTRLEN_UPPRO); + + regmap_read(regmap, ISC_CTRLSR, &val); + while ((val & ISC_CTRLSR_UPPRO) && counter--) { + usleep_range(1000, 2000); + regmap_read(regmap, ISC_CTRLSR, &val); + } + + if (counter < 0) + return -ETIMEDOUT; + + return 0; +} + +static int isc_start_streaming(struct vb2_queue *vq, unsigned int count) +{ + struct isc_device *isc = vb2_get_drv_priv(vq); + struct regmap *regmap = isc->regmap; + struct isc_buffer *buf; + unsigned long flags; + int ret; + u32 val; + + /* Enable stream on the sub device */ + ret = v4l2_subdev_call(isc->current_subdev->sd, video, s_stream, 1); + if (ret && ret != -ENOIOCTLCMD) { + v4l2_err(&isc->v4l2_dev, "stream on failed in subdev\n"); + goto err; + } + + ret = isc_configure(isc); + if (unlikely(ret)) + goto err; + + /* Clean the interrupt status register */ + regmap_read(regmap, ISC_INTSR, &val); + + /* Enable DMA interrupt */ + regmap_update_bits(regmap, ISC_INTEN, + ISC_INTEN_DDONE_MASK, ISC_INTEN_DDONE); + + spin_lock_irqsave(&isc->dma_queue_lock, flags); + + isc->sequence = 0; + isc->stop = false; + reinit_completion(&isc->comp); + + isc->cur_frm = list_first_entry(&isc->dma_queue, + struct isc_buffer, list); + list_del(&isc->cur_frm->list); + + isc_start_dma(regmap, isc->cur_frm, isc->current_fmt->reg_dctrl_dview); + + spin_unlock_irqrestore(&isc->dma_queue_lock, flags); + + return 0; + +err: + spin_lock_irqsave(&isc->dma_queue_lock, flags); + list_for_each_entry(buf, &isc->dma_queue, list) + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_QUEUED); + INIT_LIST_HEAD(&isc->dma_queue); + spin_unlock_irqrestore(&isc->dma_queue_lock, flags); + + return ret; +} + +static void isc_stop_streaming(struct vb2_queue *vq) +{ + struct isc_device *isc = vb2_get_drv_priv(vq); + unsigned long flags; + struct isc_buffer *buf; + int ret; + + isc->stop = true; + + /* Wait until the end of the current frame */ + if (isc->cur_frm && !wait_for_completion_timeout(&isc->comp, 5 * HZ)) + v4l2_err(&isc->v4l2_dev, + "Timeout waiting for end of the capture\n"); + + /* Disable DMA interrupt */ + regmap_update_bits(isc->regmap, ISC_INTDIS, + ISC_INTDIS_DDONE_MASK, ISC_INTDIS_DDONE); + + /* Disable stream on the sub device */ + ret = v4l2_subdev_call(isc->current_subdev->sd, video, s_stream, 0); + if (ret && ret != -ENOIOCTLCMD) + v4l2_err(&isc->v4l2_dev, "stream off failed in subdev\n"); + + /* Release all active buffers */ + spin_lock_irqsave(&isc->dma_queue_lock, flags); + if (unlikely(isc->cur_frm)) { + vb2_buffer_done(&isc->cur_frm->vb.vb2_buf, + VB2_BUF_STATE_ERROR); + isc->cur_frm = NULL; + } + list_for_each_entry(buf, &isc->dma_queue, list) + vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); + INIT_LIST_HEAD(&isc->dma_queue); + spin_unlock_irqrestore(&isc->dma_queue_lock, flags); +} + +static void isc_buffer_queue(struct vb2_buffer *vb) +{ + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + struct isc_buffer *buf = container_of(vbuf, struct isc_buffer, vb); + struct isc_device *isc = vb2_get_drv_priv(vb->vb2_queue); + unsigned long flags; + + spin_lock_irqsave(&isc->dma_queue_lock, flags); + list_add_tail(&buf->list, &isc->dma_queue); + spin_unlock_irqrestore(&isc->dma_queue_lock, flags); +} + +static struct vb2_ops isc_vb2_ops = { + .queue_setup = isc_queue_setup, + .wait_prepare = vb2_ops_wait_prepare, + .wait_finish = vb2_ops_wait_finish, + .buf_prepare = isc_buffer_prepare, + .start_streaming = isc_start_streaming, + .stop_streaming = isc_stop_streaming, + .buf_queue = isc_buffer_queue, +}; + +static int isc_querycap(struct file *file, void *priv, + struct v4l2_capability *cap) +{ + struct isc_device *isc = video_drvdata(file); + + strcpy(cap->driver, ATMEL_ISC_NAME); + strcpy(cap->card, "Atmel Image Sensor Controller"); + snprintf(cap->bus_info, sizeof(cap->bus_info), + "platform:%s", isc->v4l2_dev.name); + + cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; + cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; + + return 0; +} + +static int isc_enum_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_fmtdesc *f) +{ + struct isc_device *isc = video_drvdata(file); + u32 index = f->index; + + if (index >= isc->num_user_formats) + return -EINVAL; + + f->pixelformat = isc->user_formats[index]->fourcc; + + return 0; +} + +static int isc_g_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *fmt) +{ + struct isc_device *isc = video_drvdata(file); + + *fmt = isc->fmt; + + return 0; +} + +static struct isc_format *find_format_by_fourcc(struct isc_device *isc, + unsigned int fourcc) +{ + unsigned int num_formats = isc->num_user_formats; + struct isc_format *fmt; + unsigned int i; + + for (i = 0; i < num_formats; i++) { + fmt = isc->user_formats[i]; + if (fmt->fourcc == fourcc) + return fmt; + } + + return NULL; +} + +static int isc_try_fmt(struct isc_device *isc, struct v4l2_format *f, + struct isc_format **current_fmt, u32 *code) +{ + struct isc_format *isc_fmt; + struct v4l2_pix_format *pixfmt = &f->fmt.pix; + struct v4l2_subdev_format format = { + .which = V4L2_SUBDEV_FORMAT_TRY, + }; + u32 mbus_code; + int ret; + + if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + isc_fmt = find_format_by_fourcc(isc, pixfmt->pixelformat); + if (!isc_fmt) { + v4l2_warn(&isc->v4l2_dev, "Format 0x%x not found\n", + pixfmt->pixelformat); + return -EINVAL; + } + + /* Limit to Atmel ISC hardware capabilities */ + if (pixfmt->width > ISC_MAX_SUPPORT_WIDTH) + pixfmt->width = ISC_MAX_SUPPORT_WIDTH; + if (pixfmt->height > ISC_MAX_SUPPORT_HEIGHT) + pixfmt->height = ISC_MAX_SUPPORT_HEIGHT; + + if (sensor_is_preferred(isc->sensor_preferred, isc_fmt)) + mbus_code = isc_fmt->sd_mbus_code; + else + mbus_code = isc_fmt->isc_mbus_code; + + v4l2_fill_mbus_format(&format.format, pixfmt, mbus_code); + ret = v4l2_subdev_call(isc->current_subdev->sd, pad, set_fmt, + isc->current_subdev->config, &format); + if (ret < 0) + return ret; + + v4l2_fill_pix_format(pixfmt, &format.format); + + switch (pixfmt->field) { + case V4L2_FIELD_ANY: + case V4L2_FIELD_NONE: + break; + default: + v4l2_err(&isc->v4l2_dev, "Field type %d unsupported.\n", + pixfmt->field); + return -EINVAL; + } + + pixfmt->bytesperline = pixfmt->width * isc_fmt->bpp; + pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height; + + if (current_fmt) + *current_fmt = isc_fmt; + + if (code) + *code = mbus_code; + + return 0; +} + +static int isc_set_fmt(struct isc_device *isc, struct v4l2_format *f) +{ + struct v4l2_subdev_format format = { + .which = V4L2_SUBDEV_FORMAT_ACTIVE, + }; + struct isc_format *current_fmt; + int ret; + u32 mbus_code; + + ret = isc_try_fmt(isc, f, ¤t_fmt, &mbus_code); + if (ret) + return ret; + + v4l2_fill_mbus_format(&format.format, &f->fmt.pix, mbus_code); + ret = v4l2_subdev_call(isc->current_subdev->sd, pad, + set_fmt, NULL, &format); + if (ret < 0) + return ret; + + isc->fmt = *f; + isc->current_fmt = current_fmt; + + return 0; +} + +static int isc_s_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct isc_device *isc = video_drvdata(file); + + if (vb2_is_streaming(&isc->vb2_vidq)) + return -EBUSY; + + return isc_set_fmt(isc, f); +} + +static int isc_try_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct isc_device *isc = video_drvdata(file); + + return isc_try_fmt(isc, f, NULL, NULL); +} + +static int isc_enum_input(struct file *file, void *priv, + struct v4l2_input *inp) +{ + if (inp->index != 0) + return -EINVAL; + + inp->type = V4L2_INPUT_TYPE_CAMERA; + inp->std = 0; + strcpy(inp->name, "Camera"); + + return 0; +} + +static int isc_g_input(struct file *file, void *priv, unsigned int *i) +{ + *i = 0; + + return 0; +} + +static int isc_s_input(struct file *file, void *priv, unsigned int i) +{ + if (i > 0) + return -EINVAL; + + return 0; +} + +static int isc_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a) +{ + struct isc_device *isc = video_drvdata(file); + int ret; + + if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + ret = v4l2_subdev_call(isc->current_subdev->sd, video, g_parm, a); + if (ret == -ENOIOCTLCMD) + ret = 0; + + return ret; +} + +static int isc_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a) +{ + struct isc_device *isc = video_drvdata(file); + int ret; + + if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + ret = v4l2_subdev_call(isc->current_subdev->sd, video, s_parm, a); + if (ret == -ENOIOCTLCMD) + ret = 0; + + return ret; +} + +static const struct v4l2_ioctl_ops isc_ioctl_ops = { + .vidioc_querycap = isc_querycap, + .vidioc_enum_fmt_vid_cap = isc_enum_fmt_vid_cap, + .vidioc_g_fmt_vid_cap = isc_g_fmt_vid_cap, + .vidioc_s_fmt_vid_cap = isc_s_fmt_vid_cap, + .vidioc_try_fmt_vid_cap = isc_try_fmt_vid_cap, + + .vidioc_enum_input = isc_enum_input, + .vidioc_g_input = isc_g_input, + .vidioc_s_input = isc_s_input, + + .vidioc_reqbufs = vb2_ioctl_reqbufs, + .vidioc_querybuf = vb2_ioctl_querybuf, + .vidioc_qbuf = vb2_ioctl_qbuf, + .vidioc_expbuf = vb2_ioctl_expbuf, + .vidioc_dqbuf = vb2_ioctl_dqbuf, + .vidioc_create_bufs = vb2_ioctl_create_bufs, + .vidioc_prepare_buf = vb2_ioctl_prepare_buf, + .vidioc_streamon = vb2_ioctl_streamon, + .vidioc_streamoff = vb2_ioctl_streamoff, + + .vidioc_g_parm = isc_g_parm, + .vidioc_s_parm = isc_s_parm, +}; + +static int isc_set_default_fmt(struct isc_device *isc) +{ + u32 index = isc->num_user_formats - 1; + struct v4l2_format f = { + .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, + .fmt.pix = { + .width = VGA_WIDTH, + .height = VGA_HEIGHT, + .field = V4L2_FIELD_ANY, + .pixelformat = isc->user_formats[index]->fourcc, + }, + }; + + return isc_set_fmt(isc, &f); +} + +static int isc_open(struct file *file) +{ + struct isc_device *isc = video_drvdata(file); + struct v4l2_subdev *sd = isc->current_subdev->sd; + int ret; + + if (mutex_lock_interruptible(&isc->lock)) + return -ERESTARTSYS; + + ret = v4l2_fh_open(file); + if (ret < 0) + goto unlock; + + ret = v4l2_subdev_call(sd, core, s_power, 1); + if (ret < 0 && ret != -ENOIOCTLCMD) + goto unlock; + + ret = clk_prepare_enable(isc->hclock); + if (ret) + goto unlock; + + ret = clk_prepare_enable(isc->ispck); + if (ret) + goto unlock; + + ret = isc_set_default_fmt(isc); + if (ret) + goto unlock; + + /* Disable all the interrupts */ + regmap_write(isc->regmap, ISC_INTDIS, (u32)~0UL); + +unlock: + mutex_unlock(&isc->lock); + return ret; +} + +static int isc_release(struct file *file) +{ + struct isc_device *isc = video_drvdata(file); + struct v4l2_subdev *sd = isc->current_subdev->sd; + int ret; + + mutex_lock(&isc->lock); + + ret = _vb2_fop_release(file, NULL); + + v4l2_subdev_call(sd, core, s_power, 0); + + clk_disable_unprepare(isc->ispck); + clk_disable_unprepare(isc->hclock); + + mutex_unlock(&isc->lock); + + return ret; +} + +static const struct v4l2_file_operations isc_fops = { + .owner = THIS_MODULE, + .open = isc_open, + .release = isc_release, + .unlocked_ioctl = video_ioctl2, + .read = vb2_fop_read, + .mmap = vb2_fop_mmap, + .poll = vb2_fop_poll, +}; + +static irqreturn_t isc_interrupt(int irq, void *dev_id) +{ + struct isc_device *isc = (struct isc_device *)dev_id; + struct regmap *regmap = isc->regmap; + u32 isc_intsr, isc_intmask, pending; + irqreturn_t ret = IRQ_NONE; + + spin_lock(&isc->dma_queue_lock); + + regmap_read(regmap, ISC_INTSR, &isc_intsr); + regmap_read(regmap, ISC_INTMASK, &isc_intmask); + + pending = isc_intsr & isc_intmask; + + if (likely(pending & ISC_INTSR_DDONE)) { + if (isc->cur_frm) { + struct vb2_v4l2_buffer *vbuf = &isc->cur_frm->vb; + struct vb2_buffer *vb = &vbuf->vb2_buf; + + vb->timestamp = ktime_get_ns(); + vbuf->sequence = isc->sequence++; + vb2_buffer_done(vb, VB2_BUF_STATE_DONE); + isc->cur_frm = NULL; + } + + if (!list_empty(&isc->dma_queue) && !isc->stop) { + isc->cur_frm = list_first_entry(&isc->dma_queue, + struct isc_buffer, list); + list_del(&isc->cur_frm->list); + + isc_start_dma(regmap, isc->cur_frm, + isc->current_fmt->reg_dctrl_dview); + } + + if (isc->stop) + complete(&isc->comp); + + ret = IRQ_HANDLED; + } + + spin_unlock(&isc->dma_queue_lock); + + return ret; +} + +static int isc_async_bound(struct v4l2_async_notifier *notifier, + struct v4l2_subdev *subdev, + struct v4l2_async_subdev *asd) +{ + struct isc_device *isc = container_of(notifier->v4l2_dev, + struct isc_device, v4l2_dev); + struct isc_subdev_entity *subdev_entity = + container_of(notifier, struct isc_subdev_entity, notifier); + + if (video_is_registered(&isc->video_dev)) { + v4l2_err(&isc->v4l2_dev, "only supports one sub-device.\n"); + return -EBUSY; + } + + subdev_entity->sd = subdev; + + return 0; +} + +static void isc_async_unbind(struct v4l2_async_notifier *notifier, + struct v4l2_subdev *subdev, + struct v4l2_async_subdev *asd) +{ + struct isc_device *isc = container_of(notifier->v4l2_dev, + struct isc_device, v4l2_dev); + + video_unregister_device(&isc->video_dev); + vb2_dma_contig_cleanup_ctx(isc->alloc_ctx); + isc->alloc_ctx = NULL; + if (isc->current_subdev->config) + v4l2_subdev_free_pad_config(isc->current_subdev->config); +} + +static struct isc_format *find_format_by_code(unsigned int code, int *index) +{ + struct isc_format *fmt = &isc_formats[0]; + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(isc_formats); i++) { + if (fmt->sd_mbus_code == code) { + *index = i; + return fmt; + } + + fmt++; + } + + return NULL; +} + +static int isc_formats_init(struct isc_device *isc) +{ + struct isc_format *fmt; + struct v4l2_subdev *subdev = isc->current_subdev->sd; + int num_fmts, i, j; + struct v4l2_subdev_mbus_code_enum mbus_code = { + .which = V4L2_SUBDEV_FORMAT_ACTIVE, + }; + + fmt = &isc_formats[0]; + for (i = 0; i < ARRAY_SIZE(isc_formats); i++) { + fmt->isc_support = false; + fmt->sd_support = false; + + fmt++; + } + + while (!v4l2_subdev_call(subdev, pad, enum_mbus_code, + NULL, &mbus_code)) { + mbus_code.index++; + fmt = find_format_by_code(mbus_code.code, &i); + if (!fmt) + continue; + + fmt->sd_support = true; + + if (i <= RAW_FMT_INDEX_END) { + for (j = ISC_FMT_INDEX_START; + j <= ISC_FMT_INDEX_END; j++) { + isc_formats[j].isc_support = true; + isc_formats[j].isc_mbus_code = mbus_code.code; + isc_formats[j].reg_isc_bps = fmt->reg_sd_bps; + isc_formats[j].reg_wb_cfg = fmt->reg_wb_cfg; + isc_formats[j].reg_cfa_cfg = fmt->reg_cfa_cfg; + } + } + } + + fmt = &isc_formats[0]; + for (i = 0, num_fmts = 0; i < ARRAY_SIZE(isc_formats); i++) { + if (fmt->isc_support || fmt->sd_support) + num_fmts++; + + fmt++; + } + + if (!num_fmts) + return -ENXIO; + + isc->num_user_formats = num_fmts; + isc->user_formats = devm_kcalloc(isc->dev, + num_fmts, sizeof(struct isc_format *), + GFP_KERNEL); + if (!isc->user_formats) { + v4l2_err(&isc->v4l2_dev, "could not allocate memory\n"); + return -ENOMEM; + } + + fmt = &isc_formats[0]; + for (i = 0, j = 0; i < ARRAY_SIZE(isc_formats); i++) { + if (fmt->isc_support || fmt->sd_support) + isc->user_formats[j++] = fmt; + + fmt++; + } + + return 0; +} + +static int isc_async_complete(struct v4l2_async_notifier *notifier) +{ + struct isc_device *isc = container_of(notifier->v4l2_dev, + struct isc_device, v4l2_dev); + struct isc_subdev_entity *sd_entity; + struct video_device *vdev = &isc->video_dev; + struct vb2_queue *q = &isc->vb2_vidq; + int ret; + + isc->current_subdev = container_of(notifier, + struct isc_subdev_entity, notifier); + sd_entity = isc->current_subdev; + + mutex_init(&isc->lock); + init_completion(&isc->comp); + + /* Initialize videobuf2 queue */ + isc->alloc_ctx = vb2_dma_contig_init_ctx(isc->dev); + if (IS_ERR(isc->alloc_ctx)) { + ret = PTR_ERR(isc->alloc_ctx); + v4l2_err(&isc->v4l2_dev, + "Failed to get the context: %d\n", ret); + return ret; + } + + q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + q->io_modes = VB2_MMAP; + q->drv_priv = isc; + q->buf_struct_size = sizeof(struct isc_buffer); + q->ops = &isc_vb2_ops; + q->mem_ops = &vb2_dma_contig_memops; + q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; + q->lock = &isc->lock; + q->min_buffers_needed = 1; + + ret = vb2_queue_init(q); + if (ret < 0) { + v4l2_err(&isc->v4l2_dev, + "vb2_queue_init() failed: %d\n", ret); + return ret; + } + + /* Init video dma queues */ + INIT_LIST_HEAD(&isc->dma_queue); + spin_lock_init(&isc->dma_queue_lock); + + /* Register video device */ + strlcpy(vdev->name, ATMEL_ISC_NAME, sizeof(vdev->name)); + vdev->release = video_device_release_empty; + vdev->fops = &isc_fops; + vdev->ioctl_ops = &isc_ioctl_ops; + vdev->v4l2_dev = &isc->v4l2_dev; + vdev->vfl_dir = VFL_DIR_RX; + vdev->queue = q; + vdev->lock = &isc->lock; + vdev->ctrl_handler = isc->current_subdev->sd->ctrl_handler; + video_set_drvdata(vdev, isc); + + ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1); + if (ret < 0) { + v4l2_err(&isc->v4l2_dev, + "video_register_device failed: %d\n", ret); + return ret; + } + + sd_entity->config = v4l2_subdev_alloc_pad_config(sd_entity->sd); + if (sd_entity->config == NULL) + return -ENOMEM; + + ret = isc_formats_init(isc); + if (ret < 0) { + v4l2_err(&isc->v4l2_dev, + "Init format failed: %d\n", ret); + return ret; + } + + return 0; +} + +static void isc_subdev_cleanup(struct isc_device *isc) +{ + struct isc_subdev_entity *subdev_entity; + + list_for_each_entry(subdev_entity, &isc->subdev_entities, list) + v4l2_async_notifier_unregister(&subdev_entity->notifier); + + INIT_LIST_HEAD(&isc->subdev_entities); +} + +static int isc_parse_dt(struct device *dev, struct isc_device *isc) +{ + struct device_node *np = dev->of_node; + struct device_node *epn = NULL, *rem; + struct v4l2_of_endpoint v4l2_epn; + struct isc_subdev_entity *subdev_entity; + unsigned int flags; + int ret; + + ret = of_property_read_u32(np, "atmel,sensor-preferred", + &isc->sensor_preferred); + if (ret) + isc->sensor_preferred = 1; + + INIT_LIST_HEAD(&isc->subdev_entities); + + for (; ;) { + epn = of_graph_get_next_endpoint(np, epn); + if (!epn) + break; + + rem = of_graph_get_remote_port_parent(epn); + if (!rem) { + dev_notice(dev, "Remote device at %s not found\n", + of_node_full_name(epn)); + continue; + } + + ret = v4l2_of_parse_endpoint(epn, &v4l2_epn); + if (ret) { + of_node_put(rem); + ret = -EINVAL; + dev_err(dev, "Could not parse the endpoint\n"); + break; + } + + subdev_entity = devm_kzalloc(dev, + sizeof(*subdev_entity), GFP_KERNEL); + if (subdev_entity == NULL) { + of_node_put(rem); + ret = -ENOMEM; + break; + } + + subdev_entity->asd = devm_kzalloc(dev, + sizeof(*subdev_entity->asd), GFP_KERNEL); + if (subdev_entity->asd == NULL) { + of_node_put(rem); + ret = -ENOMEM; + break; + } + + flags = v4l2_epn.bus.parallel.flags; + + if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW) + subdev_entity->pfe_cfg0 = ISC_PFE_CFG0_HPOL_LOW; + else + subdev_entity->pfe_cfg0 = ISC_PFE_CFG0_HPOL_HIGH; + + if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW) + subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_VPOL_LOW; + else + subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_VPOL_HIGH; + + if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING) + subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_PPOL_LOW; + else + subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_PPOL_HIGH; + + subdev_entity->asd->match_type = V4L2_ASYNC_MATCH_OF; + subdev_entity->asd->match.of.node = rem; + list_add_tail(&subdev_entity->list, &isc->subdev_entities); + } + + of_node_put(epn); + return ret; +} + +/* regmap configuration */ +#define ATMEL_ISC_REG_MAX 0xbfc +static const struct regmap_config isc_regmap_config = { + .reg_bits = 32, + .reg_stride = 4, + .val_bits = 32, + .max_register = ATMEL_ISC_REG_MAX, +}; + +static int atmel_isc_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct isc_device *isc; + struct resource *res; + void __iomem *io_base; + struct isc_subdev_entity *subdev_entity; + int irq; + int ret; + + isc = devm_kzalloc(dev, sizeof(*isc), GFP_KERNEL); + if (!isc) + return -ENOMEM; + + platform_set_drvdata(pdev, isc); + isc->dev = &pdev->dev; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + io_base = devm_ioremap_resource(dev, res); + if (IS_ERR(io_base)) + return PTR_ERR(io_base); + + isc->regmap = devm_regmap_init_mmio(dev, io_base, &isc_regmap_config); + if (IS_ERR(isc->regmap)) { + ret = PTR_ERR(isc->regmap); + dev_err(dev, "failed to init register map: %d\n", ret); + return ret; + } + + irq = platform_get_irq(pdev, 0); + if (IS_ERR_VALUE(irq)) { + ret = irq; + dev_err(dev, "failed to get irq: %d\n", ret); + return ret; + } + + ret = devm_request_irq(dev, irq, isc_interrupt, 0, + ATMEL_ISC_NAME, isc); + if (ret < 0) { + dev_err(dev, "can't register ISR for IRQ %u (ret=%i)\n", + irq, ret); + return ret; + } + + isc->hclock = devm_clk_get(dev, "hclock"); + if (IS_ERR(isc->hclock)) { + ret = PTR_ERR(isc->hclock); + dev_err(dev, "failed to get hclock: %d\n", ret); + return ret; + } + + ret = isc_clk_init(isc); + if (ret) { + dev_err(dev, "failed to init isc clock: %d\n", ret); + goto clean_isc_clk; + } + + isc->ispck = devm_clk_get(dev, "ispck"); + if (IS_ERR(isc->ispck)) { + ret = PTR_ERR(isc->ispck); + dev_err(dev, "failed to get isc_ispck: %d\n", ret); + goto clean_isc_clk; + } + + /* ispck should be greater or equal to hclock */ + ret = clk_set_rate(isc->ispck, clk_get_rate(isc->hclock)); + if (ret) { + dev_err(dev, "failed to set ispck rate: %d\n", ret); + goto clean_isc_clk; + } + + ret = v4l2_device_register(dev, &isc->v4l2_dev); + if (ret) { + dev_err(dev, "unable to register v4l2 device.\n"); + goto clean_isc_clk; + } + + ret = isc_parse_dt(dev, isc); + if (ret) { + dev_err(dev, "fail to parse device tree\n"); + goto unregister_v4l2_device; + } + + if (list_empty(&isc->subdev_entities)) { + dev_err(dev, "no subdev found\n"); + goto unregister_v4l2_device; + } + + list_for_each_entry(subdev_entity, &isc->subdev_entities, list) { + subdev_entity->notifier.subdevs = &subdev_entity->asd; + subdev_entity->notifier.num_subdevs = 1; + subdev_entity->notifier.bound = isc_async_bound; + subdev_entity->notifier.unbind = isc_async_unbind; + subdev_entity->notifier.complete = isc_async_complete; + + ret = v4l2_async_notifier_register(&isc->v4l2_dev, + &subdev_entity->notifier); + if (ret) { + dev_err(dev, "fail to register async notifier\n"); + goto cleanup_subdev; + } + + if (video_is_registered(&isc->video_dev)) + break; + } + + return 0; + +cleanup_subdev: + isc_subdev_cleanup(isc); + +unregister_v4l2_device: + v4l2_device_unregister(&isc->v4l2_dev); + +clean_isc_clk: + isc_clk_cleanup(isc); + + return ret; +} + +static int atmel_isc_remove(struct platform_device *pdev) +{ + struct isc_device *isc = platform_get_drvdata(pdev); + + isc_subdev_cleanup(isc); + + v4l2_device_unregister(&isc->v4l2_dev); + + isc_clk_cleanup(isc); + + return 0; +} + +static const struct of_device_id atmel_isc_of_match[] = { + { .compatible = "atmel,sama5d2-isc" }, + { } +}; +MODULE_DEVICE_TABLE(of, atmel_isc_of_match); + +static struct platform_driver atmel_isc_driver = { + .probe = atmel_isc_probe, + .remove = atmel_isc_remove, + .driver = { + .name = ATMEL_ISC_NAME, + .of_match_table = of_match_ptr(atmel_isc_of_match), + }, +}; + +module_platform_driver(atmel_isc_driver); + +MODULE_AUTHOR("Songjun Wu "); +MODULE_DESCRIPTION("The V4L2 driver for Atmel-ISC"); +MODULE_LICENSE("GPL v2"); +MODULE_SUPPORTED_DEVICE("video");