1 files changed, 423 insertions, 0 deletions

diff --git a/drivers/media/platform/vimc/vimc-sensor.c b/drivers/media/platform/vimc/vimc-sensor.c
new file mode 100644
index 000000000..3f0ffd491
--- /dev/null
+++ b/drivers/media/platform/vimc/vimc-sensor.c
@@ -0,0 +1,423 @@
+/*
+ * vimc-sensor.c Virtual Media Controller Driver
+ *
+ * Copyright (C) 2015-2017 Helen Koike <helen.fornazier@gmail.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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/component.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
+#include <linux/v4l2-mediabus.h>
+#include <linux/vmalloc.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-subdev.h>
+#include <media/tpg/v4l2-tpg.h>
+
+#include "vimc-common.h"
+
+#define VIMC_SEN_DRV_NAME "vimc-sensor"
+
+struct vimc_sen_device {
+	struct vimc_ent_device ved;
+	struct v4l2_subdev sd;
+	struct device *dev;
+	struct tpg_data tpg;
+	struct task_struct *kthread_sen;
+	u8 *frame;
+	/* The active format */
+	struct v4l2_mbus_framefmt mbus_format;
+	struct v4l2_ctrl_handler hdl;
+};
+
+static const struct v4l2_mbus_framefmt fmt_default = {
+	.width = 640,
+	.height = 480,
+	.code = MEDIA_BUS_FMT_RGB888_1X24,
+	.field = V4L2_FIELD_NONE,
+	.colorspace = V4L2_COLORSPACE_DEFAULT,
+};
+
+static int vimc_sen_init_cfg(struct v4l2_subdev *sd,
+			     struct v4l2_subdev_pad_config *cfg)
+{
+	unsigned int i;
+
+	for (i = 0; i < sd->entity.num_pads; i++) {
+		struct v4l2_mbus_framefmt *mf;
+
+		mf = v4l2_subdev_get_try_format(sd, cfg, i);
+		*mf = fmt_default;
+	}
+
+	return 0;
+}
+
+static int vimc_sen_enum_mbus_code(struct v4l2_subdev *sd,
+				   struct v4l2_subdev_pad_config *cfg,
+				   struct v4l2_subdev_mbus_code_enum *code)
+{
+	const struct vimc_pix_map *vpix = vimc_pix_map_by_index(code->index);
+
+	if (!vpix)
+		return -EINVAL;
+
+	code->code = vpix->code;
+
+	return 0;
+}
+
+static int vimc_sen_enum_frame_size(struct v4l2_subdev *sd,
+				    struct v4l2_subdev_pad_config *cfg,
+				    struct v4l2_subdev_frame_size_enum *fse)
+{
+	const struct vimc_pix_map *vpix;
+
+	if (fse->index)
+		return -EINVAL;
+
+	/* Only accept code in the pix map table */
+	vpix = vimc_pix_map_by_code(fse->code);
+	if (!vpix)
+		return -EINVAL;
+
+	fse->min_width = VIMC_FRAME_MIN_WIDTH;
+	fse->max_width = VIMC_FRAME_MAX_WIDTH;
+	fse->min_height = VIMC_FRAME_MIN_HEIGHT;
+	fse->max_height = VIMC_FRAME_MAX_HEIGHT;
+
+	return 0;
+}
+
+static int vimc_sen_get_fmt(struct v4l2_subdev *sd,
+			    struct v4l2_subdev_pad_config *cfg,
+			    struct v4l2_subdev_format *fmt)
+{
+	struct vimc_sen_device *vsen =
+				container_of(sd, struct vimc_sen_device, sd);
+
+	fmt->format = fmt->which == V4L2_SUBDEV_FORMAT_TRY ?
+		      *v4l2_subdev_get_try_format(sd, cfg, fmt->pad) :
+		      vsen->mbus_format;
+
+	return 0;
+}
+
+static void vimc_sen_tpg_s_format(struct vimc_sen_device *vsen)
+{
+	const struct vimc_pix_map *vpix =
+				vimc_pix_map_by_code(vsen->mbus_format.code);
+
+	tpg_reset_source(&vsen->tpg, vsen->mbus_format.width,
+			 vsen->mbus_format.height, vsen->mbus_format.field);
+	tpg_s_bytesperline(&vsen->tpg, 0, vsen->mbus_format.width * vpix->bpp);
+	tpg_s_buf_height(&vsen->tpg, vsen->mbus_format.height);
+	tpg_s_fourcc(&vsen->tpg, vpix->pixelformat);
+	/* TODO: add support for V4L2_FIELD_ALTERNATE */
+	tpg_s_field(&vsen->tpg, vsen->mbus_format.field, false);
+	tpg_s_colorspace(&vsen->tpg, vsen->mbus_format.colorspace);
+	tpg_s_ycbcr_enc(&vsen->tpg, vsen->mbus_format.ycbcr_enc);
+	tpg_s_quantization(&vsen->tpg, vsen->mbus_format.quantization);
+	tpg_s_xfer_func(&vsen->tpg, vsen->mbus_format.xfer_func);
+}
+
+static void vimc_sen_adjust_fmt(struct v4l2_mbus_framefmt *fmt)
+{
+	const struct vimc_pix_map *vpix;
+
+	/* Only accept code in the pix map table */
+	vpix = vimc_pix_map_by_code(fmt->code);
+	if (!vpix)
+		fmt->code = fmt_default.code;
+
+	fmt->width = clamp_t(u32, fmt->width, VIMC_FRAME_MIN_WIDTH,
+			     VIMC_FRAME_MAX_WIDTH) & ~1;
+	fmt->height = clamp_t(u32, fmt->height, VIMC_FRAME_MIN_HEIGHT,
+			      VIMC_FRAME_MAX_HEIGHT) & ~1;
+
+	/* TODO: add support for V4L2_FIELD_ALTERNATE */
+	if (fmt->field == V4L2_FIELD_ANY || fmt->field == V4L2_FIELD_ALTERNATE)
+		fmt->field = fmt_default.field;
+
+	vimc_colorimetry_clamp(fmt);
+}
+
+static int vimc_sen_set_fmt(struct v4l2_subdev *sd,
+			    struct v4l2_subdev_pad_config *cfg,
+			    struct v4l2_subdev_format *fmt)
+{
+	struct vimc_sen_device *vsen = v4l2_get_subdevdata(sd);
+	struct v4l2_mbus_framefmt *mf;
+
+	if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
+		/* Do not change the format while stream is on */
+		if (vsen->frame)
+			return -EBUSY;
+
+		mf = &vsen->mbus_format;
+	} else {
+		mf = v4l2_subdev_get_try_format(sd, cfg, fmt->pad);
+	}
+
+	/* Set the new format */
+	vimc_sen_adjust_fmt(&fmt->format);
+
+	dev_dbg(vsen->dev, "%s: format update: "
+		"old:%dx%d (0x%x, %d, %d, %d, %d) "
+		"new:%dx%d (0x%x, %d, %d, %d, %d)\n", vsen->sd.name,
+		/* old */
+		mf->width, mf->height, mf->code,
+		mf->colorspace,	mf->quantization,
+		mf->xfer_func, mf->ycbcr_enc,
+		/* new */
+		fmt->format.width, fmt->format.height, fmt->format.code,
+		fmt->format.colorspace, fmt->format.quantization,
+		fmt->format.xfer_func, fmt->format.ycbcr_enc);
+
+	*mf = fmt->format;
+
+	return 0;
+}
+
+static const struct v4l2_subdev_pad_ops vimc_sen_pad_ops = {
+	.init_cfg		= vimc_sen_init_cfg,
+	.enum_mbus_code		= vimc_sen_enum_mbus_code,
+	.enum_frame_size	= vimc_sen_enum_frame_size,
+	.get_fmt		= vimc_sen_get_fmt,
+	.set_fmt		= vimc_sen_set_fmt,
+};
+
+static void *vimc_sen_process_frame(struct vimc_ent_device *ved,
+				    const void *sink_frame)
+{
+	struct vimc_sen_device *vsen = container_of(ved, struct vimc_sen_device,
+						    ved);
+
+	tpg_fill_plane_buffer(&vsen->tpg, 0, 0, vsen->frame);
+	return vsen->frame;
+}
+
+static int vimc_sen_s_stream(struct v4l2_subdev *sd, int enable)
+{
+	struct vimc_sen_device *vsen =
+				container_of(sd, struct vimc_sen_device, sd);
+
+	if (enable) {
+		const struct vimc_pix_map *vpix;
+		unsigned int frame_size;
+
+		if (vsen->kthread_sen)
+			/* tpg is already executing */
+			return 0;
+
+		/* Calculate the frame size */
+		vpix = vimc_pix_map_by_code(vsen->mbus_format.code);
+		frame_size = vsen->mbus_format.width * vpix->bpp *
+			     vsen->mbus_format.height;
+
+		/*
+		 * Allocate the frame buffer. Use vmalloc to be able to
+		 * allocate a large amount of memory
+		 */
+		vsen->frame = vmalloc(frame_size);
+		if (!vsen->frame)
+			return -ENOMEM;
+
+		/* configure the test pattern generator */
+		vimc_sen_tpg_s_format(vsen);
+
+	} else {
+
+		vfree(vsen->frame);
+		vsen->frame = NULL;
+		return 0;
+	}
+
+	return 0;
+}
+
+static struct v4l2_subdev_core_ops vimc_sen_core_ops = {
+	.log_status = v4l2_ctrl_subdev_log_status,
+	.subscribe_event = v4l2_ctrl_subdev_subscribe_event,
+	.unsubscribe_event = v4l2_event_subdev_unsubscribe,
+};
+
+static const struct v4l2_subdev_video_ops vimc_sen_video_ops = {
+	.s_stream = vimc_sen_s_stream,
+};
+
+static const struct v4l2_subdev_ops vimc_sen_ops = {
+	.core = &vimc_sen_core_ops,
+	.pad = &vimc_sen_pad_ops,
+	.video = &vimc_sen_video_ops,
+};
+
+static int vimc_sen_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct vimc_sen_device *vsen =
+		container_of(ctrl->handler, struct vimc_sen_device, hdl);
+
+	switch (ctrl->id) {
+	case VIMC_CID_TEST_PATTERN:
+		tpg_s_pattern(&vsen->tpg, ctrl->val);
+		break;
+	case V4L2_CID_HFLIP:
+		tpg_s_hflip(&vsen->tpg, ctrl->val);
+		break;
+	case V4L2_CID_VFLIP:
+		tpg_s_vflip(&vsen->tpg, ctrl->val);
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static const struct v4l2_ctrl_ops vimc_sen_ctrl_ops = {
+	.s_ctrl = vimc_sen_s_ctrl,
+};
+
+static void vimc_sen_comp_unbind(struct device *comp, struct device *master,
+				 void *master_data)
+{
+	struct vimc_ent_device *ved = dev_get_drvdata(comp);
+	struct vimc_sen_device *vsen =
+				container_of(ved, struct vimc_sen_device, ved);
+
+	vimc_ent_sd_unregister(ved, &vsen->sd);
+	v4l2_ctrl_handler_free(&vsen->hdl);
+	tpg_free(&vsen->tpg);
+	kfree(vsen);
+}
+
+/* Image Processing Controls */
+static const struct v4l2_ctrl_config vimc_sen_ctrl_class = {
+	.flags = V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY,
+	.id = VIMC_CID_VIMC_CLASS,
+	.name = "VIMC Controls",
+	.type = V4L2_CTRL_TYPE_CTRL_CLASS,
+};
+
+static const struct v4l2_ctrl_config vimc_sen_ctrl_test_pattern = {
+	.ops = &vimc_sen_ctrl_ops,
+	.id = VIMC_CID_TEST_PATTERN,
+	.name = "Test Pattern",
+	.type = V4L2_CTRL_TYPE_MENU,
+	.max = TPG_PAT_NOISE,
+	.qmenu = tpg_pattern_strings,
+};
+
+static int vimc_sen_comp_bind(struct device *comp, struct device *master,
+			      void *master_data)
+{
+	struct v4l2_device *v4l2_dev = master_data;
+	struct vimc_platform_data *pdata = comp->platform_data;
+	struct vimc_sen_device *vsen;
+	int ret;
+
+	/* Allocate the vsen struct */
+	vsen = kzalloc(sizeof(*vsen), GFP_KERNEL);
+	if (!vsen)
+		return -ENOMEM;
+
+	v4l2_ctrl_handler_init(&vsen->hdl, 4);
+
+	v4l2_ctrl_new_custom(&vsen->hdl, &vimc_sen_ctrl_class, NULL);
+	v4l2_ctrl_new_custom(&vsen->hdl, &vimc_sen_ctrl_test_pattern, NULL);
+	v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
+			  V4L2_CID_VFLIP, 0, 1, 1, 0);
+	v4l2_ctrl_new_std(&vsen->hdl, &vimc_sen_ctrl_ops,
+			  V4L2_CID_HFLIP, 0, 1, 1, 0);
+	vsen->sd.ctrl_handler = &vsen->hdl;
+	if (vsen->hdl.error) {
+		ret = vsen->hdl.error;
+		goto err_free_vsen;
+	}
+
+	/* Initialize ved and sd */
+	ret = vimc_ent_sd_register(&vsen->ved, &vsen->sd, v4l2_dev,
+				   pdata->entity_name,
+				   MEDIA_ENT_F_CAM_SENSOR, 1,
+				   (const unsigned long[1]) {MEDIA_PAD_FL_SOURCE},
+				   &vimc_sen_ops);
+	if (ret)
+		goto err_free_hdl;
+
+	vsen->ved.process_frame = vimc_sen_process_frame;
+	dev_set_drvdata(comp, &vsen->ved);
+	vsen->dev = comp;
+
+	/* Initialize the frame format */
+	vsen->mbus_format = fmt_default;
+
+	/* Initialize the test pattern generator */
+	tpg_init(&vsen->tpg, vsen->mbus_format.width,
+		 vsen->mbus_format.height);
+	ret = tpg_alloc(&vsen->tpg, VIMC_FRAME_MAX_WIDTH);
+	if (ret)
+		goto err_unregister_ent_sd;
+
+	return 0;
+
+err_unregister_ent_sd:
+	vimc_ent_sd_unregister(&vsen->ved,  &vsen->sd);
+err_free_hdl:
+	v4l2_ctrl_handler_free(&vsen->hdl);
+err_free_vsen:
+	kfree(vsen);
+
+	return ret;
+}
+
+static const struct component_ops vimc_sen_comp_ops = {
+	.bind = vimc_sen_comp_bind,
+	.unbind = vimc_sen_comp_unbind,
+};
+
+static int vimc_sen_probe(struct platform_device *pdev)
+{
+	return component_add(&pdev->dev, &vimc_sen_comp_ops);
+}
+
+static int vimc_sen_remove(struct platform_device *pdev)
+{
+	component_del(&pdev->dev, &vimc_sen_comp_ops);
+
+	return 0;
+}
+
+static const struct platform_device_id vimc_sen_driver_ids[] = {
+	{
+		.name           = VIMC_SEN_DRV_NAME,
+	},
+	{ }
+};
+
+static struct platform_driver vimc_sen_pdrv = {
+	.probe		= vimc_sen_probe,
+	.remove		= vimc_sen_remove,
+	.id_table	= vimc_sen_driver_ids,
+	.driver		= {
+		.name	= VIMC_SEN_DRV_NAME,
+	},
+};
+
+module_platform_driver(vimc_sen_pdrv);
+
+MODULE_DEVICE_TABLE(platform, vimc_sen_driver_ids);
+
+MODULE_DESCRIPTION("Virtual Media Controller Driver (VIMC) Sensor");
+MODULE_AUTHOR("Helen Mae Koike Fornazier <helen.fornazier@gmail.com>");
+MODULE_LICENSE("GPL");