1525 lines
37 KiB
C
1525 lines
37 KiB
C
/*
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* Atmel Image Sensor Controller (ISC) driver
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*
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* Copyright (C) 2016 Atmel
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*
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* Author: Songjun Wu <songjun.wu@microchip.com>
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*
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* This program is free software; you may redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* Sensor-->PFE-->WB-->CFA-->CC-->GAM-->CSC-->CBC-->SUB-->RLP-->DMA
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*
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* ISC video pipeline integrates the following submodules:
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* PFE: Parallel Front End to sample the camera sensor input stream
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* WB: Programmable white balance in the Bayer domain
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* CFA: Color filter array interpolation module
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* CC: Programmable color correction
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* GAM: Gamma correction
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* CSC: Programmable color space conversion
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* CBC: Contrast and Brightness control
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* SUB: This module performs YCbCr444 to YCbCr420 chrominance subsampling
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* RLP: This module performs rounding, range limiting
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* and packing of the incoming data
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*/
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#include <linux/clk.h>
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#include <linux/clkdev.h>
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#include <linux/clk-provider.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/regmap.h>
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#include <linux/videodev2.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-image-sizes.h>
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#include <media/v4l2-ioctl.h>
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#include <media/v4l2-of.h>
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#include <media/v4l2-subdev.h>
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#include <media/videobuf2-dma-contig.h>
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#include "atmel-isc-regs.h"
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#define ATMEL_ISC_NAME "atmel_isc"
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#define ISC_MAX_SUPPORT_WIDTH 2592
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#define ISC_MAX_SUPPORT_HEIGHT 1944
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#define ISC_CLK_MAX_DIV 255
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enum isc_clk_id {
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ISC_ISPCK = 0,
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ISC_MCK = 1,
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};
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struct isc_clk {
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struct clk_hw hw;
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struct clk *clk;
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struct regmap *regmap;
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u8 id;
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u8 parent_id;
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u32 div;
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struct device *dev;
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};
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#define to_isc_clk(hw) container_of(hw, struct isc_clk, hw)
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struct isc_buffer {
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struct vb2_v4l2_buffer vb;
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struct list_head list;
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};
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struct isc_subdev_entity {
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struct v4l2_subdev *sd;
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struct v4l2_async_subdev *asd;
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struct v4l2_async_notifier notifier;
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struct v4l2_subdev_pad_config *config;
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u32 pfe_cfg0;
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struct list_head list;
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};
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/*
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* struct isc_format - ISC media bus format information
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* @fourcc: Fourcc code for this format
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* @mbus_code: V4L2 media bus format code.
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* @bpp: Bytes per pixel (when stored in memory)
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* @reg_bps: reg value for bits per sample
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* (when transferred over a bus)
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* @support: Indicates format supported by subdev
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*/
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struct isc_format {
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u32 fourcc;
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u32 mbus_code;
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u8 bpp;
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u32 reg_bps;
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u32 reg_rlp_mode;
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u32 reg_dcfg_imode;
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u32 reg_dctrl_dview;
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bool support;
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};
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#define ISC_PIPE_LINE_NODE_NUM 11
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struct isc_device {
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struct regmap *regmap;
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struct clk *hclock;
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struct clk *ispck;
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struct isc_clk isc_clks[2];
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struct device *dev;
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struct v4l2_device v4l2_dev;
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struct video_device video_dev;
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struct vb2_queue vb2_vidq;
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spinlock_t dma_queue_lock;
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struct list_head dma_queue;
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struct isc_buffer *cur_frm;
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unsigned int sequence;
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bool stop;
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struct completion comp;
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struct v4l2_format fmt;
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struct isc_format **user_formats;
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unsigned int num_user_formats;
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const struct isc_format *current_fmt;
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struct mutex lock;
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struct regmap_field *pipeline[ISC_PIPE_LINE_NODE_NUM];
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struct isc_subdev_entity *current_subdev;
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struct list_head subdev_entities;
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};
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static struct isc_format isc_formats[] = {
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{ V4L2_PIX_FMT_SBGGR8, MEDIA_BUS_FMT_SBGGR8_1X8,
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1, ISC_PFE_CFG0_BPS_EIGHT, ISC_RLP_CFG_MODE_DAT8,
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ISC_DCFG_IMODE_PACKED8, ISC_DCTRL_DVIEW_PACKED, false },
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{ V4L2_PIX_FMT_SGBRG8, MEDIA_BUS_FMT_SGBRG8_1X8,
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1, ISC_PFE_CFG0_BPS_EIGHT, ISC_RLP_CFG_MODE_DAT8,
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ISC_DCFG_IMODE_PACKED8, ISC_DCTRL_DVIEW_PACKED, false },
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{ V4L2_PIX_FMT_SGRBG8, MEDIA_BUS_FMT_SGRBG8_1X8,
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1, ISC_PFE_CFG0_BPS_EIGHT, ISC_RLP_CFG_MODE_DAT8,
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ISC_DCFG_IMODE_PACKED8, ISC_DCTRL_DVIEW_PACKED, false },
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{ V4L2_PIX_FMT_SRGGB8, MEDIA_BUS_FMT_SRGGB8_1X8,
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1, ISC_PFE_CFG0_BPS_EIGHT, ISC_RLP_CFG_MODE_DAT8,
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ISC_DCFG_IMODE_PACKED8, ISC_DCTRL_DVIEW_PACKED, false },
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{ V4L2_PIX_FMT_SBGGR10, MEDIA_BUS_FMT_SBGGR10_1X10,
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2, ISC_PFG_CFG0_BPS_TEN, ISC_RLP_CFG_MODE_DAT10,
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ISC_DCFG_IMODE_PACKED16, ISC_DCTRL_DVIEW_PACKED, false },
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{ V4L2_PIX_FMT_SGBRG10, MEDIA_BUS_FMT_SGBRG10_1X10,
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2, ISC_PFG_CFG0_BPS_TEN, ISC_RLP_CFG_MODE_DAT10,
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ISC_DCFG_IMODE_PACKED16, ISC_DCTRL_DVIEW_PACKED, false },
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{ V4L2_PIX_FMT_SGRBG10, MEDIA_BUS_FMT_SGRBG10_1X10,
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2, ISC_PFG_CFG0_BPS_TEN, ISC_RLP_CFG_MODE_DAT10,
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ISC_DCFG_IMODE_PACKED16, ISC_DCTRL_DVIEW_PACKED, false },
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{ V4L2_PIX_FMT_SRGGB10, MEDIA_BUS_FMT_SRGGB10_1X10,
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2, ISC_PFG_CFG0_BPS_TEN, ISC_RLP_CFG_MODE_DAT10,
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ISC_DCFG_IMODE_PACKED16, ISC_DCTRL_DVIEW_PACKED, false },
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{ V4L2_PIX_FMT_SBGGR12, MEDIA_BUS_FMT_SBGGR12_1X12,
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2, ISC_PFG_CFG0_BPS_TWELVE, ISC_RLP_CFG_MODE_DAT12,
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ISC_DCFG_IMODE_PACKED16, ISC_DCTRL_DVIEW_PACKED, false },
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{ V4L2_PIX_FMT_SGBRG12, MEDIA_BUS_FMT_SGBRG12_1X12,
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2, ISC_PFG_CFG0_BPS_TWELVE, ISC_RLP_CFG_MODE_DAT12,
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ISC_DCFG_IMODE_PACKED16, ISC_DCTRL_DVIEW_PACKED, false },
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{ V4L2_PIX_FMT_SGRBG12, MEDIA_BUS_FMT_SGRBG12_1X12,
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2, ISC_PFG_CFG0_BPS_TWELVE, ISC_RLP_CFG_MODE_DAT12,
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ISC_DCFG_IMODE_PACKED16, ISC_DCTRL_DVIEW_PACKED, false },
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{ V4L2_PIX_FMT_SRGGB12, MEDIA_BUS_FMT_SRGGB12_1X12,
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2, ISC_PFG_CFG0_BPS_TWELVE, ISC_RLP_CFG_MODE_DAT12,
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ISC_DCFG_IMODE_PACKED16, ISC_DCTRL_DVIEW_PACKED, false },
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{ V4L2_PIX_FMT_YUYV, MEDIA_BUS_FMT_YUYV8_2X8,
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2, ISC_PFE_CFG0_BPS_EIGHT, ISC_RLP_CFG_MODE_DAT8,
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ISC_DCFG_IMODE_PACKED8, ISC_DCTRL_DVIEW_PACKED, false },
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};
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static int isc_clk_enable(struct clk_hw *hw)
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{
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struct isc_clk *isc_clk = to_isc_clk(hw);
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u32 id = isc_clk->id;
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struct regmap *regmap = isc_clk->regmap;
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dev_dbg(isc_clk->dev, "ISC CLK: %s, div = %d, parent id = %d\n",
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__func__, isc_clk->div, isc_clk->parent_id);
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regmap_update_bits(regmap, ISC_CLKCFG,
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ISC_CLKCFG_DIV_MASK(id) | ISC_CLKCFG_SEL_MASK(id),
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(isc_clk->div << ISC_CLKCFG_DIV_SHIFT(id)) |
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(isc_clk->parent_id << ISC_CLKCFG_SEL_SHIFT(id)));
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regmap_write(regmap, ISC_CLKEN, ISC_CLK(id));
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return 0;
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}
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static void isc_clk_disable(struct clk_hw *hw)
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{
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struct isc_clk *isc_clk = to_isc_clk(hw);
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u32 id = isc_clk->id;
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regmap_write(isc_clk->regmap, ISC_CLKDIS, ISC_CLK(id));
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}
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static int isc_clk_is_enabled(struct clk_hw *hw)
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{
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struct isc_clk *isc_clk = to_isc_clk(hw);
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u32 status;
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regmap_read(isc_clk->regmap, ISC_CLKSR, &status);
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return status & ISC_CLK(isc_clk->id) ? 1 : 0;
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}
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static unsigned long
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isc_clk_recalc_rate(struct clk_hw *hw, unsigned long parent_rate)
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{
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struct isc_clk *isc_clk = to_isc_clk(hw);
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return DIV_ROUND_CLOSEST(parent_rate, isc_clk->div + 1);
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}
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static int isc_clk_determine_rate(struct clk_hw *hw,
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struct clk_rate_request *req)
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{
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struct isc_clk *isc_clk = to_isc_clk(hw);
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long best_rate = -EINVAL;
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int best_diff = -1;
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unsigned int i, div;
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for (i = 0; i < clk_hw_get_num_parents(hw); i++) {
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struct clk_hw *parent;
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unsigned long parent_rate;
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parent = clk_hw_get_parent_by_index(hw, i);
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if (!parent)
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continue;
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parent_rate = clk_hw_get_rate(parent);
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if (!parent_rate)
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continue;
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for (div = 1; div < ISC_CLK_MAX_DIV + 2; div++) {
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unsigned long rate;
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int diff;
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rate = DIV_ROUND_CLOSEST(parent_rate, div);
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diff = abs(req->rate - rate);
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if (best_diff < 0 || best_diff > diff) {
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best_rate = rate;
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best_diff = diff;
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req->best_parent_rate = parent_rate;
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req->best_parent_hw = parent;
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}
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if (!best_diff || rate < req->rate)
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break;
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}
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if (!best_diff)
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break;
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}
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dev_dbg(isc_clk->dev,
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"ISC CLK: %s, best_rate = %ld, parent clk: %s @ %ld\n",
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__func__, best_rate,
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__clk_get_name((req->best_parent_hw)->clk),
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req->best_parent_rate);
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if (best_rate < 0)
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return best_rate;
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req->rate = best_rate;
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return 0;
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}
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static int isc_clk_set_parent(struct clk_hw *hw, u8 index)
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{
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struct isc_clk *isc_clk = to_isc_clk(hw);
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if (index >= clk_hw_get_num_parents(hw))
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return -EINVAL;
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isc_clk->parent_id = index;
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return 0;
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}
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static u8 isc_clk_get_parent(struct clk_hw *hw)
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{
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struct isc_clk *isc_clk = to_isc_clk(hw);
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return isc_clk->parent_id;
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}
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static int isc_clk_set_rate(struct clk_hw *hw,
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unsigned long rate,
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unsigned long parent_rate)
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{
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struct isc_clk *isc_clk = to_isc_clk(hw);
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u32 div;
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if (!rate)
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return -EINVAL;
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div = DIV_ROUND_CLOSEST(parent_rate, rate);
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if (div > (ISC_CLK_MAX_DIV + 1) || !div)
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return -EINVAL;
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isc_clk->div = div - 1;
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return 0;
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}
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static const struct clk_ops isc_clk_ops = {
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.enable = isc_clk_enable,
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.disable = isc_clk_disable,
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.is_enabled = isc_clk_is_enabled,
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.recalc_rate = isc_clk_recalc_rate,
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.determine_rate = isc_clk_determine_rate,
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.set_parent = isc_clk_set_parent,
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.get_parent = isc_clk_get_parent,
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.set_rate = isc_clk_set_rate,
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};
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static int isc_clk_register(struct isc_device *isc, unsigned int id)
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{
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struct regmap *regmap = isc->regmap;
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struct device_node *np = isc->dev->of_node;
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struct isc_clk *isc_clk;
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struct clk_init_data init;
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const char *clk_name = np->name;
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const char *parent_names[3];
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int num_parents;
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num_parents = of_clk_get_parent_count(np);
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if (num_parents < 1 || num_parents > 3)
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return -EINVAL;
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if (num_parents > 2 && id == ISC_ISPCK)
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num_parents = 2;
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of_clk_parent_fill(np, parent_names, num_parents);
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if (id == ISC_MCK)
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of_property_read_string(np, "clock-output-names", &clk_name);
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else
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clk_name = "isc-ispck";
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init.parent_names = parent_names;
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init.num_parents = num_parents;
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init.name = clk_name;
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init.ops = &isc_clk_ops;
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init.flags = CLK_SET_RATE_GATE | CLK_SET_PARENT_GATE;
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isc_clk = &isc->isc_clks[id];
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isc_clk->hw.init = &init;
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isc_clk->regmap = regmap;
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isc_clk->id = id;
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isc_clk->dev = isc->dev;
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isc_clk->clk = clk_register(isc->dev, &isc_clk->hw);
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if (IS_ERR(isc_clk->clk)) {
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dev_err(isc->dev, "%s: clock register fail\n", clk_name);
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return PTR_ERR(isc_clk->clk);
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} else if (id == ISC_MCK)
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of_clk_add_provider(np, of_clk_src_simple_get, isc_clk->clk);
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return 0;
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}
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static int isc_clk_init(struct isc_device *isc)
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{
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unsigned int i;
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int ret;
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for (i = 0; i < ARRAY_SIZE(isc->isc_clks); i++)
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isc->isc_clks[i].clk = ERR_PTR(-EINVAL);
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for (i = 0; i < ARRAY_SIZE(isc->isc_clks); i++) {
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ret = isc_clk_register(isc, i);
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if (ret)
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return ret;
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}
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return 0;
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}
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static void isc_clk_cleanup(struct isc_device *isc)
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{
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unsigned int i;
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of_clk_del_provider(isc->dev->of_node);
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for (i = 0; i < ARRAY_SIZE(isc->isc_clks); i++) {
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struct isc_clk *isc_clk = &isc->isc_clks[i];
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if (!IS_ERR(isc_clk->clk))
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clk_unregister(isc_clk->clk);
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}
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}
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static int isc_queue_setup(struct vb2_queue *vq,
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unsigned int *nbuffers, unsigned int *nplanes,
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unsigned int sizes[], struct device *alloc_devs[])
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{
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struct isc_device *isc = vb2_get_drv_priv(vq);
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unsigned int size = isc->fmt.fmt.pix.sizeimage;
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if (*nplanes)
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return sizes[0] < size ? -EINVAL : 0;
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*nplanes = 1;
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sizes[0] = size;
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return 0;
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}
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static int isc_buffer_prepare(struct vb2_buffer *vb)
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{
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struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
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struct isc_device *isc = vb2_get_drv_priv(vb->vb2_queue);
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unsigned long size = isc->fmt.fmt.pix.sizeimage;
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if (vb2_plane_size(vb, 0) < size) {
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v4l2_err(&isc->v4l2_dev, "buffer too small (%lu < %lu)\n",
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vb2_plane_size(vb, 0), size);
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return -EINVAL;
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}
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vb2_set_plane_payload(vb, 0, size);
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vbuf->field = isc->fmt.fmt.pix.field;
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return 0;
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}
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static inline void isc_start_dma(struct regmap *regmap,
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struct isc_buffer *frm, u32 dview)
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{
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dma_addr_t addr;
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addr = vb2_dma_contig_plane_dma_addr(&frm->vb.vb2_buf, 0);
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regmap_write(regmap, ISC_DCTRL, dview | ISC_DCTRL_IE_IS);
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regmap_write(regmap, ISC_DAD0, addr);
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regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_CAPTURE);
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}
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static void isc_set_pipeline(struct isc_device *isc, u32 pipeline)
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{
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u32 val;
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unsigned int i;
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for (i = 0; i < ISC_PIPE_LINE_NODE_NUM; i++) {
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val = pipeline & BIT(i) ? 1 : 0;
|
|
regmap_field_write(isc->pipeline[i], val);
|
|
}
|
|
}
|
|
|
|
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 val, mask;
|
|
int counter = 10;
|
|
|
|
val = current_fmt->reg_bps | subdev->pfe_cfg0 |
|
|
ISC_PFE_CFG0_MODE_PROGRESSIVE;
|
|
mask = ISC_PFE_CFG0_BPS_MASK | ISC_PFE_CFG0_HPOL_LOW |
|
|
ISC_PFE_CFG0_VPOL_LOW | ISC_PFE_CFG0_PPOL_LOW |
|
|
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);
|
|
|
|
/* Disable the pipeline */
|
|
isc_set_pipeline(isc, 0x0);
|
|
|
|
/* Update profile */
|
|
regmap_write(regmap, ISC_CTRLEN, ISC_CTRL_UPPRO);
|
|
|
|
regmap_read(regmap, ISC_CTRLSR, &val);
|
|
while ((val & ISC_CTRL_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_start_stream;
|
|
}
|
|
|
|
pm_runtime_get_sync(isc->dev);
|
|
|
|
/* Disable all the interrupts */
|
|
regmap_write(isc->regmap, ISC_INTDIS, (u32)~0UL);
|
|
|
|
/* Clean the interrupt status register */
|
|
regmap_read(regmap, ISC_INTSR, &val);
|
|
|
|
ret = isc_configure(isc);
|
|
if (unlikely(ret))
|
|
goto err_configure;
|
|
|
|
/* Enable DMA interrupt */
|
|
regmap_write(regmap, ISC_INTEN, ISC_INT_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_configure:
|
|
pm_runtime_put_sync(isc->dev);
|
|
|
|
v4l2_subdev_call(isc->current_subdev->sd, video, s_stream, 0);
|
|
|
|
err_start_stream:
|
|
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_write(isc->regmap, ISC_INTDIS, ISC_INT_DDONE);
|
|
|
|
pm_runtime_put_sync(isc->dev);
|
|
|
|
/* 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);
|
|
|
|
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)
|
|
{
|
|
struct isc_format *isc_fmt;
|
|
struct v4l2_pix_format *pixfmt = &f->fmt.pix;
|
|
struct v4l2_subdev_format format = {
|
|
.which = V4L2_SUBDEV_FORMAT_TRY,
|
|
};
|
|
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);
|
|
isc_fmt = isc->user_formats[isc->num_user_formats - 1];
|
|
pixfmt->pixelformat = isc_fmt->fourcc;
|
|
}
|
|
|
|
/* 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;
|
|
|
|
v4l2_fill_mbus_format(&format.format, pixfmt, isc_fmt->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);
|
|
|
|
pixfmt->field = V4L2_FIELD_NONE;
|
|
pixfmt->bytesperline = pixfmt->width * isc_fmt->bpp;
|
|
pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
|
|
|
|
if (current_fmt)
|
|
*current_fmt = isc_fmt;
|
|
|
|
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;
|
|
|
|
ret = isc_try_fmt(isc, f, ¤t_fmt);
|
|
if (ret)
|
|
return ret;
|
|
|
|
v4l2_fill_mbus_format(&format.format, &f->fmt.pix,
|
|
current_fmt->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);
|
|
}
|
|
|
|
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);
|
|
|
|
if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
|
|
return -EINVAL;
|
|
|
|
return v4l2_subdev_call(isc->current_subdev->sd, video, g_parm, a);
|
|
}
|
|
|
|
static int isc_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
|
|
{
|
|
struct isc_device *isc = video_drvdata(file);
|
|
|
|
if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
|
|
return -EINVAL;
|
|
|
|
return v4l2_subdev_call(isc->current_subdev->sd, video, s_parm, a);
|
|
}
|
|
|
|
static int isc_enum_framesizes(struct file *file, void *fh,
|
|
struct v4l2_frmsizeenum *fsize)
|
|
{
|
|
struct isc_device *isc = video_drvdata(file);
|
|
const struct isc_format *isc_fmt;
|
|
struct v4l2_subdev_frame_size_enum fse = {
|
|
.index = fsize->index,
|
|
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
|
|
};
|
|
int ret;
|
|
|
|
isc_fmt = find_format_by_fourcc(isc, fsize->pixel_format);
|
|
if (!isc_fmt)
|
|
return -EINVAL;
|
|
|
|
fse.code = isc_fmt->mbus_code;
|
|
|
|
ret = v4l2_subdev_call(isc->current_subdev->sd, pad, enum_frame_size,
|
|
NULL, &fse);
|
|
if (ret)
|
|
return ret;
|
|
|
|
fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
|
|
fsize->discrete.width = fse.max_width;
|
|
fsize->discrete.height = fse.max_height;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int isc_enum_frameintervals(struct file *file, void *fh,
|
|
struct v4l2_frmivalenum *fival)
|
|
{
|
|
struct isc_device *isc = video_drvdata(file);
|
|
const struct isc_format *isc_fmt;
|
|
struct v4l2_subdev_frame_interval_enum fie = {
|
|
.index = fival->index,
|
|
.width = fival->width,
|
|
.height = fival->height,
|
|
.which = V4L2_SUBDEV_FORMAT_ACTIVE,
|
|
};
|
|
int ret;
|
|
|
|
isc_fmt = find_format_by_fourcc(isc, fival->pixel_format);
|
|
if (!isc_fmt)
|
|
return -EINVAL;
|
|
|
|
fie.code = isc_fmt->mbus_code;
|
|
|
|
ret = v4l2_subdev_call(isc->current_subdev->sd, pad,
|
|
enum_frame_interval, NULL, &fie);
|
|
if (ret)
|
|
return ret;
|
|
|
|
fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
|
|
fival->discrete = fie.interval;
|
|
|
|
return 0;
|
|
}
|
|
|
|
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,
|
|
.vidioc_enum_framesizes = isc_enum_framesizes,
|
|
.vidioc_enum_frameintervals = isc_enum_frameintervals,
|
|
};
|
|
|
|
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;
|
|
|
|
if (!v4l2_fh_is_singular_file(file))
|
|
goto unlock;
|
|
|
|
ret = v4l2_subdev_call(sd, core, s_power, 1);
|
|
if (ret < 0 && ret != -ENOIOCTLCMD) {
|
|
v4l2_fh_release(file);
|
|
goto unlock;
|
|
}
|
|
|
|
ret = isc_set_fmt(isc, &isc->fmt);
|
|
if (ret) {
|
|
v4l2_subdev_call(sd, core, s_power, 0);
|
|
v4l2_fh_release(file);
|
|
}
|
|
|
|
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;
|
|
bool fh_singular;
|
|
int ret;
|
|
|
|
mutex_lock(&isc->lock);
|
|
|
|
fh_singular = v4l2_fh_is_singular_file(file);
|
|
|
|
ret = _vb2_fop_release(file, NULL);
|
|
|
|
if (fh_singular)
|
|
v4l2_subdev_call(sd, core, s_power, 0);
|
|
|
|
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_INT_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);
|
|
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->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 = 0, 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->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->support = true;
|
|
num_fmts++;
|
|
}
|
|
|
|
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->support)
|
|
isc->user_formats[j++] = fmt;
|
|
|
|
fmt++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int isc_set_default_fmt(struct isc_device *isc)
|
|
{
|
|
struct v4l2_format f = {
|
|
.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
|
|
.fmt.pix = {
|
|
.width = VGA_WIDTH,
|
|
.height = VGA_HEIGHT,
|
|
.field = V4L2_FIELD_NONE,
|
|
.pixelformat = isc->user_formats[0]->fourcc,
|
|
},
|
|
};
|
|
int ret;
|
|
|
|
ret = isc_try_fmt(isc, &f, NULL);
|
|
if (ret)
|
|
return ret;
|
|
|
|
isc->current_fmt = isc->user_formats[0];
|
|
isc->fmt = f;
|
|
|
|
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 */
|
|
q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
|
|
q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ;
|
|
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;
|
|
q->dev = isc->dev;
|
|
|
|
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);
|
|
|
|
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;
|
|
}
|
|
|
|
ret = isc_set_default_fmt(isc);
|
|
if (ret) {
|
|
v4l2_err(&isc->v4l2_dev, "Could not set default format\n");
|
|
return ret;
|
|
}
|
|
|
|
/* 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;
|
|
vdev->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE;
|
|
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;
|
|
}
|
|
|
|
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_pipeline_init(struct isc_device *isc)
|
|
{
|
|
struct device *dev = isc->dev;
|
|
struct regmap *regmap = isc->regmap;
|
|
struct regmap_field *regs;
|
|
unsigned int i;
|
|
|
|
/* WB-->CFA-->CC-->GAM-->CSC-->CBC-->SUB422-->SUB420 */
|
|
const struct reg_field regfields[ISC_PIPE_LINE_NODE_NUM] = {
|
|
REG_FIELD(ISC_WB_CTRL, 0, 0),
|
|
REG_FIELD(ISC_CFA_CTRL, 0, 0),
|
|
REG_FIELD(ISC_CC_CTRL, 0, 0),
|
|
REG_FIELD(ISC_GAM_CTRL, 0, 0),
|
|
REG_FIELD(ISC_GAM_CTRL, 1, 1),
|
|
REG_FIELD(ISC_GAM_CTRL, 2, 2),
|
|
REG_FIELD(ISC_GAM_CTRL, 3, 3),
|
|
REG_FIELD(ISC_CSC_CTRL, 0, 0),
|
|
REG_FIELD(ISC_CBC_CTRL, 0, 0),
|
|
REG_FIELD(ISC_SUB422_CTRL, 0, 0),
|
|
REG_FIELD(ISC_SUB420_CTRL, 0, 0),
|
|
};
|
|
|
|
for (i = 0; i < ISC_PIPE_LINE_NODE_NUM; i++) {
|
|
regs = devm_regmap_field_alloc(dev, regmap, regfields[i]);
|
|
if (IS_ERR(regs))
|
|
return PTR_ERR(regs);
|
|
|
|
isc->pipeline[i] = regs;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
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;
|
|
|
|
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;
|
|
}
|
|
|
|
/* asd will be freed by the subsystem once it's added to the
|
|
* notifier list
|
|
*/
|
|
subdev_entity->asd = kzalloc(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;
|
|
|
|
if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
|
|
subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_VPOL_LOW;
|
|
|
|
if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
|
|
subdev_entity->pfe_cfg0 |= ISC_PFE_CFG0_PPOL_LOW;
|
|
|
|
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 = 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 (irq < 0) {
|
|
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;
|
|
}
|
|
|
|
ret = isc_pipeline_init(isc);
|
|
if (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 = isc->isc_clks[ISC_ISPCK].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");
|
|
kfree(subdev_entity->asd);
|
|
goto cleanup_subdev;
|
|
}
|
|
|
|
if (video_is_registered(&isc->video_dev))
|
|
break;
|
|
}
|
|
|
|
pm_runtime_enable(dev);
|
|
|
|
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)
|
|
{
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struct isc_device *isc = platform_get_drvdata(pdev);
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|
|
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pm_runtime_disable(&pdev->dev);
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|
|
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isc_subdev_cleanup(isc);
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|
|
|
v4l2_device_unregister(&isc->v4l2_dev);
|
|
|
|
isc_clk_cleanup(isc);
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|
|
|
return 0;
|
|
}
|
|
|
|
static int __maybe_unused isc_runtime_suspend(struct device *dev)
|
|
{
|
|
struct isc_device *isc = dev_get_drvdata(dev);
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|
|
|
clk_disable_unprepare(isc->ispck);
|
|
clk_disable_unprepare(isc->hclock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __maybe_unused isc_runtime_resume(struct device *dev)
|
|
{
|
|
struct isc_device *isc = dev_get_drvdata(dev);
|
|
int ret;
|
|
|
|
ret = clk_prepare_enable(isc->hclock);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return clk_prepare_enable(isc->ispck);
|
|
}
|
|
|
|
static const struct dev_pm_ops atmel_isc_dev_pm_ops = {
|
|
SET_RUNTIME_PM_OPS(isc_runtime_suspend, isc_runtime_resume, NULL)
|
|
};
|
|
|
|
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,
|
|
.pm = &atmel_isc_dev_pm_ops,
|
|
.of_match_table = of_match_ptr(atmel_isc_of_match),
|
|
},
|
|
};
|
|
|
|
module_platform_driver(atmel_isc_driver);
|
|
|
|
MODULE_AUTHOR("Songjun Wu <songjun.wu@microchip.com>");
|
|
MODULE_DESCRIPTION("The V4L2 driver for Atmel-ISC");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_SUPPORTED_DEVICE("video");
|