diff options
Diffstat (limited to 'drivers/media/i2c/m5mols/m5mols_capture.c')
| -rw-r--r-- | drivers/media/i2c/m5mols/m5mols_capture.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/drivers/media/i2c/m5mols/m5mols_capture.c b/drivers/media/i2c/m5mols/m5mols_capture.c new file mode 100644 index 000000000000..ab34ccedf31e --- /dev/null +++ b/drivers/media/i2c/m5mols/m5mols_capture.c @@ -0,0 +1,158 @@ + +/* + * The Capture code for Fujitsu M-5MOLS ISP + * + * Copyright (C) 2011 Samsung Electronics Co., Ltd. + * Author: HeungJun Kim <riverful.kim@samsung.com> + * + * Copyright (C) 2009 Samsung Electronics Co., Ltd. + * Author: Dongsoo Nathaniel Kim <dongsoo45.kim@samsung.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include <linux/i2c.h> +#include <linux/slab.h> +#include <linux/irq.h> +#include <linux/interrupt.h> +#include <linux/delay.h> +#include <linux/gpio.h> +#include <linux/regulator/consumer.h> +#include <linux/videodev2.h> +#include <media/v4l2-ctrls.h> +#include <media/v4l2-device.h> +#include <media/v4l2-subdev.h> +#include <media/m5mols.h> +#include <media/s5p_fimc.h> + +#include "m5mols.h" +#include "m5mols_reg.h" + +/** + * m5mols_read_rational - I2C read of a rational number + * + * Read numerator and denominator from registers @addr_num and @addr_den + * respectively and return the division result in @val. + */ +static int m5mols_read_rational(struct v4l2_subdev *sd, u32 addr_num, + u32 addr_den, u32 *val) +{ + u32 num, den; + + int ret = m5mols_read_u32(sd, addr_num, &num); + if (!ret) + ret = m5mols_read_u32(sd, addr_den, &den); + if (ret) + return ret; + *val = den == 0 ? 0 : num / den; + return ret; +} + +/** + * m5mols_capture_info - Gather captured image information + * + * For now it gathers only EXIF information and file size. + */ +static int m5mols_capture_info(struct m5mols_info *info) +{ + struct m5mols_exif *exif = &info->cap.exif; + struct v4l2_subdev *sd = &info->sd; + int ret; + + ret = m5mols_read_rational(sd, EXIF_INFO_EXPTIME_NU, + EXIF_INFO_EXPTIME_DE, &exif->exposure_time); + if (ret) + return ret; + ret = m5mols_read_rational(sd, EXIF_INFO_TV_NU, EXIF_INFO_TV_DE, + &exif->shutter_speed); + if (ret) + return ret; + ret = m5mols_read_rational(sd, EXIF_INFO_AV_NU, EXIF_INFO_AV_DE, + &exif->aperture); + if (ret) + return ret; + ret = m5mols_read_rational(sd, EXIF_INFO_BV_NU, EXIF_INFO_BV_DE, + &exif->brightness); + if (ret) + return ret; + ret = m5mols_read_rational(sd, EXIF_INFO_EBV_NU, EXIF_INFO_EBV_DE, + &exif->exposure_bias); + if (ret) + return ret; + + ret = m5mols_read_u16(sd, EXIF_INFO_ISO, &exif->iso_speed); + if (!ret) + ret = m5mols_read_u16(sd, EXIF_INFO_FLASH, &exif->flash); + if (!ret) + ret = m5mols_read_u16(sd, EXIF_INFO_SDR, &exif->sdr); + if (!ret) + ret = m5mols_read_u16(sd, EXIF_INFO_QVAL, &exif->qval); + if (ret) + return ret; + + if (!ret) + ret = m5mols_read_u32(sd, CAPC_IMAGE_SIZE, &info->cap.main); + if (!ret) + ret = m5mols_read_u32(sd, CAPC_THUMB_SIZE, &info->cap.thumb); + if (!ret) + info->cap.total = info->cap.main + info->cap.thumb; + + return ret; +} + +int m5mols_start_capture(struct m5mols_info *info) +{ + unsigned int framesize = info->cap.buf_size - M5MOLS_JPEG_TAGS_SIZE; + struct v4l2_subdev *sd = &info->sd; + int ret; + + /* + * Synchronize the controls, set the capture frame resolution and color + * format. The frame capture is initiated during switching from Monitor + * to Capture mode. + */ + ret = m5mols_set_mode(info, REG_MONITOR); + if (!ret) + ret = m5mols_restore_controls(info); + if (!ret) + ret = m5mols_write(sd, CAPP_YUVOUT_MAIN, REG_JPEG); + if (!ret) + ret = m5mols_write(sd, CAPP_MAIN_IMAGE_SIZE, info->resolution); + if (!ret) + ret = m5mols_write(sd, CAPP_JPEG_SIZE_MAX, framesize); + if (!ret) + ret = m5mols_set_mode(info, REG_CAPTURE); + if (!ret) + /* Wait until a frame is captured to ISP internal memory */ + ret = m5mols_wait_interrupt(sd, REG_INT_CAPTURE, 2000); + if (ret) + return ret; + + /* + * Initiate the captured data transfer to a MIPI-CSI receiver. + */ + ret = m5mols_write(sd, CAPC_SEL_FRAME, 1); + if (!ret) + ret = m5mols_write(sd, CAPC_START, REG_CAP_START_MAIN); + if (!ret) { + bool captured = false; + unsigned int size; + + /* Wait for the capture completion interrupt */ + ret = m5mols_wait_interrupt(sd, REG_INT_CAPTURE, 2000); + if (!ret) { + captured = true; + ret = m5mols_capture_info(info); + } + size = captured ? info->cap.main : 0; + v4l2_dbg(1, m5mols_debug, sd, "%s: size: %d, thumb.: %d B\n", + __func__, size, info->cap.thumb); + + v4l2_subdev_notify(sd, S5P_FIMC_TX_END_NOTIFY, &size); + } + + return ret; +} |