164 lines
4.5 KiB
C
164 lines
4.5 KiB
C
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/*
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* The Capture code for Fujitsu M-5MOLS ISP
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*
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* Copyright (C) 2011 Samsung Electronics Co., Ltd.
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* Author: HeungJun Kim <riverful.kim@samsung.com>
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*
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* Copyright (C) 2009 Samsung Electronics Co., Ltd.
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* Author: Dongsoo Nathaniel Kim <dongsoo45.kim@samsung.com>
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*
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* This program is free software; you can 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; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/i2c.h>
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#include <linux/slab.h>
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#include <linux/irq.h>
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <linux/gpio.h>
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#include <linux/regulator/consumer.h>
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#include <linux/videodev2.h>
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#include <media/v4l2-ctrls.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-subdev.h>
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#include <media/i2c/m5mols.h>
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#include <media/drv-intf/exynos-fimc.h>
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#include "m5mols.h"
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#include "m5mols_reg.h"
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/**
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* m5mols_read_rational - I2C read of a rational number
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* @sd: sub-device, as pointed by struct v4l2_subdev
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* @addr_num: numerator register
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* @addr_den: denominator register
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* @val: place to store the division result
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*
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* Read numerator and denominator from registers @addr_num and @addr_den
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* respectively and return the division result in @val.
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*/
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static int m5mols_read_rational(struct v4l2_subdev *sd, u32 addr_num,
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u32 addr_den, u32 *val)
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{
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u32 num, den;
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int ret = m5mols_read_u32(sd, addr_num, &num);
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if (!ret)
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ret = m5mols_read_u32(sd, addr_den, &den);
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if (ret)
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return ret;
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*val = den == 0 ? 0 : num / den;
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return ret;
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}
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/**
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* m5mols_capture_info - Gather captured image information
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* @info: M-5MOLS driver data structure
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*
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* For now it gathers only EXIF information and file size.
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*/
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static int m5mols_capture_info(struct m5mols_info *info)
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{
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struct m5mols_exif *exif = &info->cap.exif;
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struct v4l2_subdev *sd = &info->sd;
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int ret;
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ret = m5mols_read_rational(sd, EXIF_INFO_EXPTIME_NU,
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EXIF_INFO_EXPTIME_DE, &exif->exposure_time);
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if (ret)
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return ret;
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ret = m5mols_read_rational(sd, EXIF_INFO_TV_NU, EXIF_INFO_TV_DE,
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&exif->shutter_speed);
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if (ret)
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return ret;
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ret = m5mols_read_rational(sd, EXIF_INFO_AV_NU, EXIF_INFO_AV_DE,
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&exif->aperture);
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if (ret)
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return ret;
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ret = m5mols_read_rational(sd, EXIF_INFO_BV_NU, EXIF_INFO_BV_DE,
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&exif->brightness);
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if (ret)
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return ret;
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ret = m5mols_read_rational(sd, EXIF_INFO_EBV_NU, EXIF_INFO_EBV_DE,
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&exif->exposure_bias);
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if (ret)
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return ret;
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ret = m5mols_read_u16(sd, EXIF_INFO_ISO, &exif->iso_speed);
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if (!ret)
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ret = m5mols_read_u16(sd, EXIF_INFO_FLASH, &exif->flash);
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if (!ret)
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ret = m5mols_read_u16(sd, EXIF_INFO_SDR, &exif->sdr);
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if (!ret)
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ret = m5mols_read_u16(sd, EXIF_INFO_QVAL, &exif->qval);
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if (ret)
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return ret;
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if (!ret)
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ret = m5mols_read_u32(sd, CAPC_IMAGE_SIZE, &info->cap.main);
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if (!ret)
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ret = m5mols_read_u32(sd, CAPC_THUMB_SIZE, &info->cap.thumb);
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if (!ret)
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info->cap.total = info->cap.main + info->cap.thumb;
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return ret;
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}
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int m5mols_start_capture(struct m5mols_info *info)
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{
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unsigned int framesize = info->cap.buf_size - M5MOLS_JPEG_TAGS_SIZE;
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struct v4l2_subdev *sd = &info->sd;
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int ret;
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/*
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* Synchronize the controls, set the capture frame resolution and color
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* format. The frame capture is initiated during switching from Monitor
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* to Capture mode.
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*/
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ret = m5mols_set_mode(info, REG_MONITOR);
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if (!ret)
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ret = m5mols_restore_controls(info);
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if (!ret)
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ret = m5mols_write(sd, CAPP_YUVOUT_MAIN, REG_JPEG);
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if (!ret)
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ret = m5mols_write(sd, CAPP_MAIN_IMAGE_SIZE, info->resolution);
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if (!ret)
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ret = m5mols_write(sd, CAPP_JPEG_SIZE_MAX, framesize);
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if (!ret)
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ret = m5mols_set_mode(info, REG_CAPTURE);
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if (!ret)
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/* Wait until a frame is captured to ISP internal memory */
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ret = m5mols_wait_interrupt(sd, REG_INT_CAPTURE, 2000);
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if (ret)
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return ret;
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/*
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* Initiate the captured data transfer to a MIPI-CSI receiver.
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*/
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ret = m5mols_write(sd, CAPC_SEL_FRAME, 1);
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if (!ret)
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ret = m5mols_write(sd, CAPC_START, REG_CAP_START_MAIN);
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if (!ret) {
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bool captured = false;
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unsigned int size;
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/* Wait for the capture completion interrupt */
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ret = m5mols_wait_interrupt(sd, REG_INT_CAPTURE, 2000);
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if (!ret) {
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captured = true;
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ret = m5mols_capture_info(info);
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}
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size = captured ? info->cap.main : 0;
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v4l2_dbg(1, m5mols_debug, sd, "%s: size: %d, thumb.: %d B\n",
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__func__, size, info->cap.thumb);
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v4l2_subdev_notify(sd, S5P_FIMC_TX_END_NOTIFY, &size);
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}
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return ret;
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}
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