Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / media / i2c / m5mols / m5mols_capture.c

diff --git a/kernel/drivers/media/i2c/m5mols/m5mols_capture.c b/kernel/drivers/media/i2c/m5mols/m5mols_capture.c
new file mode 100644 (file)
index 0000000..1a03d02
--- /dev/null
+++ b/kernel/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/exynos-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;
+}