NVIDIA Tegra processor contains a powerful Video Input (VI) hardware
controller which can support up to 6 MIPI CSI camera sensors.
This patch adds a V4L2 media controller and capture driver to support
Tegra VI hardware. It's verified with Tegra built-in test pattern
generator.
Signed-off-by: Bryan Wu <pe...@nvidia.com>
Reviewed-by: Hans Verkuil <hans.verk...@cisco.com>
---
drivers/media/platform/Kconfig | 1 +
drivers/media/platform/Makefile | 2 +
drivers/media/platform/tegra/Kconfig | 10 +
drivers/media/platform/tegra/Makefile | 3 +
drivers/media/platform/tegra/tegra-channel.c | 849 +++++++++++++++++++++++++++
drivers/media/platform/tegra/tegra-core.c | 254 ++++++++
drivers/media/platform/tegra/tegra-core.h | 162 +++++
drivers/media/platform/tegra/tegra-csi.c | 560 ++++++++++++++++++
drivers/media/platform/tegra/tegra-vi.c | 732 +++++++++++++++++++++++
drivers/media/platform/tegra/tegra-vi.h | 213 +++++++
10 files changed, 2786 insertions(+)
create mode 100644 drivers/media/platform/tegra/Kconfig
create mode 100644 drivers/media/platform/tegra/Makefile
create mode 100644 drivers/media/platform/tegra/tegra-channel.c
create mode 100644 drivers/media/platform/tegra/tegra-core.c
create mode 100644 drivers/media/platform/tegra/tegra-core.h
create mode 100644 drivers/media/platform/tegra/tegra-csi.c
create mode 100644 drivers/media/platform/tegra/tegra-vi.c
create mode 100644 drivers/media/platform/tegra/tegra-vi.h
diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
index ccbc974..036210a 100644
--- a/drivers/media/platform/Kconfig
+++ b/drivers/media/platform/Kconfig
@@ -119,6 +119,7 @@ source "drivers/media/platform/exynos4-is/Kconfig"
source "drivers/media/platform/s5p-tv/Kconfig"
source "drivers/media/platform/am437x/Kconfig"
source "drivers/media/platform/xilinx/Kconfig"
+source "drivers/media/platform/tegra/Kconfig"
endif # V4L_PLATFORM_DRIVERS
diff --git a/drivers/media/platform/Makefile b/drivers/media/platform/Makefile
index efa0295..3c79fd3 100644
--- a/drivers/media/platform/Makefile
+++ b/drivers/media/platform/Makefile
@@ -54,4 +54,6 @@ obj-$(CONFIG_VIDEO_AM437X_VPFE) += am437x/
obj-$(CONFIG_VIDEO_XILINX) += xilinx/
+obj-$(CONFIG_VIDEO_TEGRA) += tegra/
+
ccflags-y += -I$(srctree)/drivers/media/i2c
diff --git a/drivers/media/platform/tegra/Kconfig
b/drivers/media/platform/tegra/Kconfig
new file mode 100644
index 0000000..54c0e7a
--- /dev/null
+++ b/drivers/media/platform/tegra/Kconfig
@@ -0,0 +1,10 @@
+config VIDEO_TEGRA
+ tristate "NVIDIA Tegra Video Input Driver"
+ depends on VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API && OF
+ depends on TEGRA_HOST1X
+ select VIDEOBUF2_DMA_CONTIG
+ ---help---
+ Driver for Video Input (VI) controller found on NVIDIA Tegra SoC.
+
+ To compile this driver as a module, choose M here: the module will be
+ called tegra-video.
diff --git a/drivers/media/platform/tegra/Makefile
b/drivers/media/platform/tegra/Makefile
new file mode 100644
index 0000000..18a1c16
--- /dev/null
+++ b/drivers/media/platform/tegra/Makefile
@@ -0,0 +1,3 @@
+tegra-video-objs += tegra-core.o tegra-csi.o tegra-vi.o tegra-channel.o
+
+obj-$(CONFIG_VIDEO_TEGRA) += tegra-video.o
diff --git a/drivers/media/platform/tegra/tegra-channel.c
b/drivers/media/platform/tegra/tegra-channel.c
new file mode 100644
index 0000000..63eb942
--- /dev/null
+++ b/drivers/media/platform/tegra/tegra-channel.c
@@ -0,0 +1,849 @@
+/*
+ * NVIDIA Tegra Video Input Device
+ *
+ * Copyright (c) 2015, NVIDIA CORPORATION. All rights reserved.
+ *
+ * Author: Bryan Wu <pe...@nvidia.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/atomic.h>
+#include <linux/bitmap.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/host1x.h>
+#include <linux/kthread.h>
+#include <linux/lcm.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-fh.h>
+#include <media/v4l2-ioctl.h>
+#include <media/videobuf2-v4l2.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include <soc/tegra/pmc.h>
+
+#include "tegra-vi.h"
+
+#define TEGRA_VI_SYNCPT_WAIT_TIMEOUT 200
+
+/* VI registers */
+#define TEGRA_VI_CFG_VI_INCR_SYNCPT 0x000
+#define VI_CFG_VI_INCR_SYNCPT_COND(x) (((x) & 0xff)
<< 8)
+#define VI_CSI_PP_LINE_START(port) (4 + (port) * 4)
+#define VI_CSI_PP_FRAME_START(port) (5 + (port) * 4)
+#define VI_CSI_MW_REQ_DONE(port) (6 + (port) * 4)
+#define VI_CSI_MW_ACK_DONE(port) (7 + (port) * 4)
+
+#define TEGRA_VI_CFG_VI_INCR_SYNCPT_CNTRL 0x004
+#define TEGRA_VI_CFG_VI_INCR_SYNCPT_ERROR 0x008
+#define TEGRA_VI_CFG_CTXSW 0x020
+#define TEGRA_VI_CFG_INTSTATUS 0x024
+#define TEGRA_VI_CFG_PWM_CONTROL 0x038
+#define TEGRA_VI_CFG_PWM_HIGH_PULSE 0x03c
+#define TEGRA_VI_CFG_PWM_LOW_PULSE 0x040
+#define TEGRA_VI_CFG_PWM_SELECT_PULSE_A 0x044
+#define TEGRA_VI_CFG_PWM_SELECT_PULSE_B 0x048
+#define TEGRA_VI_CFG_PWM_SELECT_PULSE_C 0x04c
+#define TEGRA_VI_CFG_PWM_SELECT_PULSE_D 0x050
+#define TEGRA_VI_CFG_VGP1 0x064
+#define TEGRA_VI_CFG_VGP2 0x068
+#define TEGRA_VI_CFG_VGP3 0x06c
+#define TEGRA_VI_CFG_VGP4 0x070
+#define TEGRA_VI_CFG_VGP5 0x074
+#define TEGRA_VI_CFG_VGP6 0x078
+#define TEGRA_VI_CFG_INTERRUPT_MASK 0x08c
+#define TEGRA_VI_CFG_INTERRUPT_TYPE_SELECT 0x090
+#define TEGRA_VI_CFG_INTERRUPT_POLARITY_SELECT 0x094
+#define TEGRA_VI_CFG_INTERRUPT_STATUS 0x098
+#define TEGRA_VI_CFG_VGP_SYNCPT_CONFIG 0x0ac
+#define TEGRA_VI_CFG_VI_SW_RESET 0x0b4
+#define TEGRA_VI_CFG_CG_CTRL 0x0b8
+#define VI_CG_2ND_LEVEL_EN 0x1
+#define TEGRA_VI_CFG_VI_MCCIF_FIFOCTRL 0x0e4
+#define TEGRA_VI_CFG_TIMEOUT_WCOAL_VI 0x0e8
+#define TEGRA_VI_CFG_DVFS 0x0f0
+#define TEGRA_VI_CFG_RESERVE 0x0f4
+#define TEGRA_VI_CFG_RESERVE_1 0x0f8
+
+/* CSI registers */
+#define TEGRA_VI_CSI_BASE(x) (0x100 + (x) * 0x100)
+
+#define TEGRA_VI_CSI_SW_RESET 0x000
+#define TEGRA_VI_CSI_SINGLE_SHOT 0x004
+#define SINGLE_SHOT_CAPTURE 0x1
+#define TEGRA_VI_CSI_SINGLE_SHOT_STATE_UPDATE 0x008
+#define TEGRA_VI_CSI_IMAGE_DEF 0x00c
+#define BYPASS_PXL_TRANSFORM_OFFSET 24
+#define IMAGE_DEF_FORMAT_OFFSET 16
+#define IMAGE_DEF_DEST_MEM 0x1
+#define TEGRA_VI_CSI_RGB2Y_CTRL 0x010
+#define TEGRA_VI_CSI_MEM_TILING 0x014
+#define TEGRA_VI_CSI_IMAGE_SIZE 0x018
+#define IMAGE_SIZE_HEIGHT_OFFSET 16
+#define TEGRA_VI_CSI_IMAGE_SIZE_WC 0x01c
+#define TEGRA_VI_CSI_IMAGE_DT 0x020
+#define TEGRA_VI_CSI_SURFACE0_OFFSET_MSB 0x024
+#define TEGRA_VI_CSI_SURFACE0_OFFSET_LSB 0x028
+#define TEGRA_VI_CSI_SURFACE1_OFFSET_MSB 0x02c
+#define TEGRA_VI_CSI_SURFACE1_OFFSET_LSB 0x030
+#define TEGRA_VI_CSI_SURFACE2_OFFSET_MSB 0x034
+#define TEGRA_VI_CSI_SURFACE2_OFFSET_LSB 0x038
+#define TEGRA_VI_CSI_SURFACE0_BF_OFFSET_MSB 0x03c
+#define TEGRA_VI_CSI_SURFACE0_BF_OFFSET_LSB 0x040
+#define TEGRA_VI_CSI_SURFACE1_BF_OFFSET_MSB 0x044
+#define TEGRA_VI_CSI_SURFACE1_BF_OFFSET_LSB 0x048
+#define TEGRA_VI_CSI_SURFACE2_BF_OFFSET_MSB 0x04c
+#define TEGRA_VI_CSI_SURFACE2_BF_OFFSET_LSB 0x050
+#define TEGRA_VI_CSI_SURFACE0_STRIDE 0x054
+#define TEGRA_VI_CSI_SURFACE1_STRIDE 0x058
+#define TEGRA_VI_CSI_SURFACE2_STRIDE 0x05c
+#define TEGRA_VI_CSI_SURFACE_HEIGHT0 0x060
+#define TEGRA_VI_CSI_ISPINTF_CONFIG 0x064
+#define TEGRA_VI_CSI_ERROR_STATUS 0x084
+#define TEGRA_VI_CSI_ERROR_INT_MASK 0x088
+#define TEGRA_VI_CSI_WD_CTRL 0x08c
+#define TEGRA_VI_CSI_WD_PERIOD 0x090
+
+/* Channel registers */
+static void tegra_channel_write(struct tegra_channel *chan,
+ unsigned int addr, u32 val)
+{
+ writel(val, chan->vi->iomem + addr);
+}
+
+/* CSI registers */
+static void csi_write(struct tegra_channel *chan, unsigned int addr, u32 val)
+{
+ writel(val, chan->csi + addr);
+}
+
+static u32 csi_read(struct tegra_channel *chan, unsigned int addr)
+{
+ return readl(chan->csi + addr);
+}
+
+/* CSI channel IO Rail IDs */
+static const int tegra_io_rail_csi_ids[] = {
+ TEGRA_IO_RAIL_CSIA,
+ TEGRA_IO_RAIL_CSIB,
+ TEGRA_IO_RAIL_CSIC,
+ TEGRA_IO_RAIL_CSID,
+ TEGRA_IO_RAIL_CSIE,
+ TEGRA_IO_RAIL_CSIF,
+};
+
+void tegra_channel_fmts_bitmap_init(struct tegra_channel *chan,
+ struct tegra_vi_graph_entity *entity)
+{
+ int ret, index;
+ struct v4l2_subdev *subdev = entity->subdev;
+ struct v4l2_subdev_mbus_code_enum code = {
+ .which = V4L2_SUBDEV_FORMAT_ACTIVE,
+ };
+
+ bitmap_zero(chan->fmts_bitmap, MAX_FORMAT_NUM);
+
+ while (1) {
+ ret = v4l2_subdev_call(subdev, pad, enum_mbus_code,
+ NULL, &code);
+ if (ret < 0)
+ /* no more formats */
+ break;
+
+ index = tegra_core_get_idx_by_code(code.code);
+ if (index >= 0)
+ bitmap_set(chan->fmts_bitmap, index, 1);
+
+ code.index++;
+ }
+}
+
+/*
-----------------------------------------------------------------------------
+ * Tegra channel frame setup and capture operations */
+
+static int tegra_channel_capture_setup(struct tegra_channel *chan)
+{
+ u32 height = chan->format.height;
+ u32 width = chan->format.width;
+ u32 format = chan->fmtinfo->img_fmt;
+ u32 data_type = chan->fmtinfo->img_dt;
+ u32 word_count = tegra_core_get_word_count(width, chan->fmtinfo);
+
+ csi_write(chan, TEGRA_VI_CSI_ERROR_STATUS, 0xFFFFFFFF);
+ csi_write(chan, TEGRA_VI_CSI_IMAGE_DEF,
+ ((chan->vi->pg_mode ? 0 : 1) << BYPASS_PXL_TRANSFORM_OFFSET) |
+ (format << IMAGE_DEF_FORMAT_OFFSET) |
+ IMAGE_DEF_DEST_MEM);
+ csi_write(chan, TEGRA_VI_CSI_IMAGE_DT, data_type);
+ csi_write(chan, TEGRA_VI_CSI_IMAGE_SIZE_WC, word_count);
+ csi_write(chan, TEGRA_VI_CSI_IMAGE_SIZE,
+ (height << IMAGE_SIZE_HEIGHT_OFFSET) | width);
+ return 0;
+}
+
+static void tegra_channel_capture_error(struct tegra_channel *chan)
+{
+ u32 val;
+
+ val = csi_read(chan, TEGRA_VI_CSI_ERROR_STATUS);
+ dev_err(&chan->video.dev, "TEGRA_VI_CSI_ERROR_STATUS 0x%08x\n", val);
+}
+
+static int tegra_channel_capture_frame(struct tegra_channel *chan,
+ struct tegra_channel_buffer *buf)
+{
+ int err = 0;
+ u32 thresh, value, frame_start;
+ int bytes_per_line = chan->format.bytesperline;
+
+ /* Program buffer address by using surface 0 */
+ csi_write(chan, TEGRA_VI_CSI_SURFACE0_OFFSET_MSB, 0x0);
+ csi_write(chan, TEGRA_VI_CSI_SURFACE0_OFFSET_LSB, buf->addr);
+ csi_write(chan, TEGRA_VI_CSI_SURFACE0_STRIDE, bytes_per_line);
+
+ /* Increase syncpoint max */
+ thresh = host1x_syncpt_incr_max(chan->sp, 1);
+
+ /* Program syncpoint */
+ frame_start = VI_CSI_PP_FRAME_START(chan->port);
+ value = VI_CFG_VI_INCR_SYNCPT_COND(frame_start) |
+ host1x_syncpt_id(chan->sp);
+ tegra_channel_write(chan, TEGRA_VI_CFG_VI_INCR_SYNCPT, value);
+
+ csi_write(chan, TEGRA_VI_CSI_SINGLE_SHOT, SINGLE_SHOT_CAPTURE);
+
+ /* Move buffer to capture done queue */
+ spin_lock(&chan->done_lock);
+ list_add_tail(&buf->queue, &chan->done);
+ spin_unlock(&chan->done_lock);
+
+ /* Wait up kthread for capture done */
+ wake_up_interruptible(&chan->done_wait);
+
+ /* Use syncpoint to wake up */
+ err = host1x_syncpt_wait(chan->sp, thresh,
+ TEGRA_VI_SYNCPT_WAIT_TIMEOUT, &value);
+ if (err) {
+ dev_err(&chan->video.dev, "frame start syncpt timeout!\n");
+ tegra_channel_capture_error(chan);
+ }
+ return err;
+}
+
+static int tegra_channel_kthread_capture_start(void *data)
+{
+ struct tegra_channel *chan = data;
+ struct tegra_channel_buffer *buf;
+
+ while (1) {
+ wait_event_interruptible(chan->start_wait,
+ !list_empty(&chan->capture) ||
+ kthread_should_stop());
+ if (kthread_should_stop())
+ break;
+
+ spin_lock(&chan->start_lock);
+ if (list_empty(&chan->capture)) {
+ spin_unlock(&chan->start_lock);
+ continue;
+ }
+
+ buf = list_entry(chan->capture.next,
+ struct tegra_channel_buffer, queue);
+ list_del_init(&buf->queue);
+ spin_unlock(&chan->start_lock);
+
+ tegra_channel_capture_frame(chan, buf);
+ }
+
+ return 0;
+}
+
+static int tegra_channel_capture_done(struct tegra_channel *chan,
+ struct tegra_channel_buffer *buf)
+{
+ struct vb2_v4l2_buffer *vb = &buf->buf;
+ u32 thresh, value, mw_ack_done;
+ int ret = 0;
+
+ /* Increase syncpoint max */
+ thresh = host1x_syncpt_incr_max(chan->sp, 1);
+
+ /* Program syncpoint */
+ mw_ack_done = VI_CSI_MW_ACK_DONE(chan->port);
+ value = VI_CFG_VI_INCR_SYNCPT_COND(mw_ack_done) |
+ host1x_syncpt_id(chan->sp);
+ tegra_channel_write(chan, TEGRA_VI_CFG_VI_INCR_SYNCPT, value);
+
+ /* Use syncpoint to wake up */
+ ret = host1x_syncpt_wait(chan->sp, thresh,
+ TEGRA_VI_SYNCPT_WAIT_TIMEOUT, &value);
+ if (ret)
+ dev_err(&chan->video.dev, "MW_ACK_DONE syncpoint time out!\n");
+
+ /* Captured one frame */
+ vb->sequence = chan->sequence++;
+ vb->field = V4L2_FIELD_NONE;
+ v4l2_get_timestamp(&vb->timestamp);
+ vb2_set_plane_payload(&vb->vb2_buf, 0, chan->format.sizeimage);
+ vb2_buffer_done(&vb->vb2_buf, ret < 0 ? VB2_BUF_STATE_ERROR :
VB2_BUF_STATE_DONE);
+
+ return ret;
+}
+
+static int tegra_channel_kthread_capture_done(void *data)
+{
+ struct tegra_channel *chan = data;
+ struct tegra_channel_buffer *buf;
+
+ while (1) {
+ wait_event_interruptible(chan->done_wait,
+ !list_empty(&chan->done) ||
+ kthread_should_stop());
+ if (kthread_should_stop() && list_empty(&chan->done))
+ break;
+
+ spin_lock(&chan->done_lock);
+ if (list_empty(&chan->done)) {
+ spin_unlock(&chan->done_lock);
+ continue;
+ }
+
+ buf = list_entry(chan->done.next, struct tegra_channel_buffer,
+ queue);
+ list_del_init(&buf->queue);
+ spin_unlock(&chan->done_lock);
+
+ tegra_channel_capture_done(chan, buf);
+ }
+
+ return 0;
+}
+
+
+/*
-----------------------------------------------------------------------------
+ * videobuf2 queue operations
+ */
+
+static int
+tegra_channel_queue_setup(struct vb2_queue *vq, const void *parg,
+ unsigned int *nbuffers, unsigned int *nplanes,
+ unsigned int sizes[], void *alloc_ctxs[])
+{
+ const struct v4l2_format *fmt = parg;
+ struct tegra_channel *chan = vb2_get_drv_priv(vq);
+
+ /* Make sure the image size is large enough. */
+ if (fmt && fmt->fmt.pix.sizeimage < chan->format.sizeimage)
+ return -EINVAL;
+
+ *nplanes = 1;
+
+ sizes[0] = fmt ? fmt->fmt.pix.sizeimage : chan->format.sizeimage;
+ alloc_ctxs[0] = chan->alloc_ctx;
+
+ return 0;
+}
+
+static int tegra_channel_buffer_prepare(struct vb2_buffer *vb)
+{
+ struct tegra_channel *chan = vb2_get_drv_priv(vb->vb2_queue);
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ struct tegra_channel_buffer *buf = to_tegra_channel_buffer(vbuf);
+
+ buf->chan = chan;
+ buf->addr = vb2_dma_contig_plane_dma_addr(vb, 0);
+
+ return 0;
+}
+
+static void tegra_channel_buffer_queue(struct vb2_buffer *vb)
+{
+ struct tegra_channel *chan = vb2_get_drv_priv(vb->vb2_queue);
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ struct tegra_channel_buffer *buf = to_tegra_channel_buffer(vbuf);
+
+ /* Put buffer into the capture queue */
+ spin_lock(&chan->start_lock);
+ list_add_tail(&buf->queue, &chan->capture);
+ spin_unlock(&chan->start_lock);
+
+ /* Wait up kthread for capture */
+ wake_up_interruptible(&chan->start_wait);
+}
+
+static int tegra_channel_set_stream(struct tegra_channel *chan, bool on)
+{
+ struct media_entity *entity;
+ struct media_pad *pad;
+ struct v4l2_subdev *subdev;
+ int ret = 0;
+
+ /* set_stream of CSI */
+ entity = &chan->video.entity;
+ pad = media_entity_remote_pad(&chan->pad);
+ entity = pad->entity;
+ subdev = media_entity_to_v4l2_subdev(entity);
+ subdev->host_priv = chan;
+ ret = v4l2_subdev_call(subdev, video, s_stream, on);
+ if (on && ret < 0 && ret != -ENOIOCTLCMD)
+ return ret;
+
+ /* set_stream of sensors */
+ while (1) {
+ if (pad->index - 1 < 0)
+ break;
+ pad = &entity->pads[pad->index - 1];
+ if (!(pad->flags & MEDIA_PAD_FL_SINK))
+ break;
+
+ pad = media_entity_remote_pad(pad);
+ if (pad == NULL ||
+ media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
+ break;
+
+ entity = pad->entity;
+ subdev = media_entity_to_v4l2_subdev(entity);
+ ret = v4l2_subdev_call(subdev, video, s_stream, on);
+ if (on && ret < 0 && ret != -ENOIOCTLCMD)
+ return ret;
+ }
+ return ret;
+}
+
+/* Return all queued buffers back to videobuf2 */
+static void tegra_channel_queued_buf_done(struct tegra_channel *chan,
+ enum vb2_buffer_state state)
+{
+ struct tegra_channel_buffer *buf, *nbuf;
+
+ spin_lock(&chan->start_lock);
+ list_for_each_entry_safe(buf, nbuf, &chan->capture, queue) {
+ vb2_buffer_done(&buf->buf.vb2_buf, state);
+ list_del(&buf->queue);
+ }
+ spin_unlock(&chan->start_lock);
+}
+
+static int tegra_channel_start_streaming(struct vb2_queue *vq, u32 count)
+{
+ struct tegra_channel *chan = vb2_get_drv_priv(vq);
+ struct media_pipeline *pipe = chan->video.entity.pipe;
+ int ret = 0;
+
+ /* The first open then turn on power*/
+ if (atomic_add_return(1, &chan->vi->power_on_refcnt) == 1) {
+ tegra_vi_power_on(chan->vi);
+
+ usleep_range(5, 100);
+ tegra_channel_write(chan, TEGRA_VI_CFG_CG_CTRL,
+ VI_CG_2ND_LEVEL_EN);
+ usleep_range(10, 15);
+ }
+
+ /* Disable DPD */
+ ret = tegra_io_rail_power_on(chan->io_id);
+ if (ret < 0) {
+ dev_err(&chan->video.dev,
+ "failed to power on CSI rail: %d\n", ret);
+ goto error_power_on;
+ }
+
+ /* Clean up status */
+ csi_write(chan, TEGRA_VI_CSI_ERROR_STATUS, 0xFFFFFFFF);
+
+ ret = media_entity_pipeline_start(&chan->video.entity, pipe);
+ if (ret < 0)
+ goto error_pipeline_start;
+
+ /* Start the pipeline. */
+ ret = tegra_channel_set_stream(chan, true);
+ if (ret < 0)
+ goto error_set_stream;
+
+ /* Note: Program VI registers after TPG, sensors and CSI streaming */
+ ret = tegra_channel_capture_setup(chan);
+ if (ret < 0)
+ goto error_capture_setup;
+
+ chan->sequence = 0;
+
+ /* Start kthread to capture data to buffer */
+ chan->kthread_capture_start = kthread_run(
+ tegra_channel_kthread_capture_start,
+ chan, "%s:0", chan->video.name);
+ if (IS_ERR(chan->kthread_capture_start)) {
+ dev_err(&chan->video.dev,
+ "failed to run kthread for capture start!\n");
+ ret = PTR_ERR(chan->kthread_capture_start);
+ goto error_capture_setup;
+ }
+
+ chan->kthread_capture_done = kthread_run(
+ tegra_channel_kthread_capture_done,
+ chan, "%s:1", chan->video.name);
+ if (IS_ERR(chan->kthread_capture_done)) {
+ dev_err(&chan->video.dev,
+ "failed to run kthread for capture done!\n");
+ ret = PTR_ERR(chan->kthread_capture_done);
+ goto error_capture_setup;
+ }
+
+ return 0;
+
+error_capture_setup:
+ tegra_channel_set_stream(chan, false);
+error_set_stream:
+ media_entity_pipeline_stop(&chan->video.entity);
+error_pipeline_start:
+ tegra_io_rail_power_off(chan->io_id);
+error_power_on:
+ vq->start_streaming_called = 0;
+ tegra_channel_queued_buf_done(chan, VB2_BUF_STATE_QUEUED);
+ return ret;
+}
+
+static void tegra_channel_stop_streaming(struct vb2_queue *vq)
+{
+ struct tegra_channel *chan = vb2_get_drv_priv(vq);
+
+ /* Stop the kthread for capture */
+ kthread_stop(chan->kthread_capture_start);
+ chan->kthread_capture_start = NULL;
+ kthread_stop(chan->kthread_capture_done);
+ chan->kthread_capture_done = NULL;
+
+ media_entity_pipeline_stop(&chan->video.entity);
+
+ tegra_channel_set_stream(chan, false);
+
+ tegra_io_rail_power_off(chan->io_id);
+
+ /* The last release then turn off power */
+ if (atomic_dec_and_test(&chan->vi->power_on_refcnt))
+ tegra_vi_power_off(chan->vi);
+
+ tegra_channel_queued_buf_done(chan, VB2_BUF_STATE_ERROR);
+}
+
+static const struct vb2_ops tegra_channel_queue_qops = {
+ .queue_setup = tegra_channel_queue_setup,
+ .buf_prepare = tegra_channel_buffer_prepare,
+ .buf_queue = tegra_channel_buffer_queue,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+ .start_streaming = tegra_channel_start_streaming,
+ .stop_streaming = tegra_channel_stop_streaming,
+};
+
+/*
-----------------------------------------------------------------------------
+ * V4L2 ioctls
+ */
+
+static int
+tegra_channel_querycap(struct file *file, void *fh, struct v4l2_capability
*cap)
+{
+ struct v4l2_fh *vfh = file->private_data;
+ struct tegra_channel *chan = to_tegra_channel(vfh->vdev);
+
+ cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
+ cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
+
+ strlcpy(cap->driver, "tegra-video", sizeof(cap->driver));
+ strlcpy(cap->card, chan->video.name, sizeof(cap->card));
+ snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s:%u",
+ dev_name(chan->vi->dev), chan->port);
+
+ return 0;
+}
+
+static int
+tegra_channel_enum_format(struct file *file, void *fh, struct v4l2_fmtdesc *f)
+{
+ struct v4l2_fh *vfh = file->private_data;
+ struct tegra_channel *chan = to_tegra_channel(vfh->vdev);
+ unsigned int index = 0, i;
+ unsigned long *fmts_bitmap = NULL;
+
+ if (chan->vi->pg_mode)
+ fmts_bitmap = chan->vi->tpg_fmts_bitmap;
+ else
+ fmts_bitmap = chan->fmts_bitmap;
+
+ if (f->index > bitmap_weight(fmts_bitmap, MAX_FORMAT_NUM) - 1)
+ return -EINVAL;
+
+ for (i = 0; i < f->index + 1; i++, index++)
+ index = find_next_bit(fmts_bitmap, MAX_FORMAT_NUM, index);
+
+ f->pixelformat = tegra_core_get_fourcc_by_idx(index - 1);
+
+ return 0;
+}
+
+static int tegra_channel_get_format(struct file *file, void *fh,
+ struct v4l2_format *format)
+{
+ struct v4l2_fh *vfh = file->private_data;
+ struct tegra_channel *chan = to_tegra_channel(vfh->vdev);
+
+ format->fmt.pix = chan->format;
+
+ return 0;
+}
+
+static void
+__tegra_channel_try_format(struct tegra_channel *chan,
+ struct v4l2_pix_format *pix,
+ const struct tegra_video_format **fmtinfo)
+{
+ const struct tegra_video_format *info;
+ unsigned int min_width;
+ unsigned int max_width;
+ unsigned int min_bpl;
+ unsigned int max_bpl;
+ unsigned int width;
+ unsigned int align;
+ unsigned int bpl;
+
+ /* Retrieve format information and select the default format if the
+ * requested format isn't supported.
+ */
+ info = tegra_core_get_format_by_fourcc(pix->pixelformat);
+ if (!info)
+ info = tegra_core_get_format_by_fourcc(TEGRA_VF_DEF);
+
+ pix->pixelformat = info->fourcc;
+ /* Change this when start adding interlace format support */
+ pix->field = V4L2_FIELD_NONE;
+
+ /* The transfer alignment requirements are expressed in bytes. Compute
+ * the minimum and maximum values, clamp the requested width and convert
+ * it back to pixels.
+ */
+ align = lcm(chan->align, info->bpp);
+ min_width = roundup(TEGRA_MIN_WIDTH, align);
+ max_width = rounddown(TEGRA_MAX_WIDTH, align);
+ width = roundup(pix->width * info->bpp, align);
+
+ pix->width = clamp(width, min_width, max_width) / info->bpp;
+ pix->height = clamp(pix->height, TEGRA_MIN_HEIGHT, TEGRA_MAX_HEIGHT);
+
+ /* Clamp the requested bytes per line value. If the maximum bytes per
+ * line value is zero, the module doesn't support user configurable line
+ * sizes. Override the requested value with the minimum in that case.
+ */
+ min_bpl = pix->width * info->bpp;
+ max_bpl = rounddown(TEGRA_MAX_WIDTH, chan->align);
+ bpl = roundup(pix->bytesperline, chan->align);
+
+ pix->bytesperline = clamp(bpl, min_bpl, max_bpl);
+ pix->sizeimage = pix->bytesperline * pix->height;
+ pix->colorspace = chan->format.colorspace;
+
+ if (fmtinfo)
+ *fmtinfo = info;
+}
+
+static int tegra_channel_try_format(struct file *file, void *fh,
+ struct v4l2_format *format)
+{
+ struct v4l2_fh *vfh = file->private_data;
+ struct tegra_channel *chan = to_tegra_channel(vfh->vdev);
+
+ __tegra_channel_try_format(chan, &format->fmt.pix, NULL);
+
+ return 0;
+}
+
+static int tegra_channel_set_format(struct file *file, void *fh,
+ struct v4l2_format *format)
+{
+ struct v4l2_fh *vfh = file->private_data;
+ struct tegra_channel *chan = to_tegra_channel(vfh->vdev);
+ const struct tegra_video_format *info;
+
+ if (vb2_is_busy(&chan->queue))
+ return -EBUSY;
+
+ __tegra_channel_try_format(chan, &format->fmt.pix, &info);
+
+ chan->format = format->fmt.pix;
+ chan->fmtinfo = info;
+
+ return 0;
+}
+
+static const struct v4l2_ioctl_ops tegra_channel_ioctl_ops = {
+ .vidioc_querycap = tegra_channel_querycap,
+ .vidioc_enum_fmt_vid_cap = tegra_channel_enum_format,
+ .vidioc_g_fmt_vid_cap = tegra_channel_get_format,
+ .vidioc_s_fmt_vid_cap = tegra_channel_set_format,
+ .vidioc_try_fmt_vid_cap = tegra_channel_try_format,
+ .vidioc_reqbufs = vb2_ioctl_reqbufs,
+ .vidioc_querybuf = vb2_ioctl_querybuf,
+ .vidioc_qbuf = vb2_ioctl_qbuf,
+ .vidioc_dqbuf = vb2_ioctl_dqbuf,
+ .vidioc_create_bufs = vb2_ioctl_create_bufs,
+ .vidioc_expbuf = vb2_ioctl_expbuf,
+ .vidioc_streamon = vb2_ioctl_streamon,
+ .vidioc_streamoff = vb2_ioctl_streamoff,
+};
+
+/*
-----------------------------------------------------------------------------
+ * V4L2 file operations
+ */
+
+static const struct v4l2_file_operations tegra_channel_fops = {
+ .owner = THIS_MODULE,
+ .unlocked_ioctl = video_ioctl2,
+ .open = v4l2_fh_open,
+ .release = vb2_fop_release,
+ .read = vb2_fop_read,
+ .poll = vb2_fop_poll,
+ .mmap = vb2_fop_mmap,
+};
+
+int tegra_channel_init(struct tegra_vi *vi, unsigned int port)
+{
+ int ret;
+ struct tegra_channel *chan = &vi->chans[port];
+
+ chan->vi = vi;
+ chan->port = port;
+
+ /* Init channel register base */
+ chan->csi = vi->iomem + TEGRA_VI_CSI_BASE(port);
+
+ /* VI Channel is 64 bytes alignment */
+ chan->align = 64;
+ chan->io_id = tegra_io_rail_csi_ids[chan->port];
+
+ mutex_init(&chan->video_lock);
+ INIT_LIST_HEAD(&chan->capture);
+ INIT_LIST_HEAD(&chan->done);
+ spin_lock_init(&chan->start_lock);
+ spin_lock_init(&chan->done_lock);
+ init_waitqueue_head(&chan->start_wait);
+ init_waitqueue_head(&chan->done_wait);
+
+ /* Init video format */
+ chan->fmtinfo = tegra_core_get_format_by_code(TEGRA_VF_DEF);
+ chan->format.pixelformat = chan->fmtinfo->fourcc;
+ chan->format.colorspace = V4L2_COLORSPACE_SRGB;
+ chan->format.field = V4L2_FIELD_NONE;
+ chan->format.width = TEGRA_DEF_WIDTH;
+ chan->format.height = TEGRA_DEF_HEIGHT;
+ chan->format.bytesperline = chan->format.width * chan->fmtinfo->bpp;
+ chan->format.sizeimage = chan->format.bytesperline *
+ chan->format.height;
+
+ /* Initialize the media entity... */
+ chan->pad.flags = MEDIA_PAD_FL_SINK;
+
+ ret = media_entity_init(&chan->video.entity, 1, &chan->pad, 0);
+ if (ret < 0)
+ return ret;
+
+ /* ... and the video node... */
+ chan->video.fops = &tegra_channel_fops;
+ chan->video.v4l2_dev = &vi->v4l2_dev;
+ chan->video.queue = &chan->queue;
+ snprintf(chan->video.name, sizeof(chan->video.name), "%s-%s-%u",
+ dev_name(vi->dev), "output", port);
+ chan->video.vfl_type = VFL_TYPE_GRABBER;
+ chan->video.vfl_dir = VFL_DIR_RX;
+ chan->video.release = video_device_release_empty;
+ chan->video.ioctl_ops = &tegra_channel_ioctl_ops;
+ chan->video.lock = &chan->video_lock;
+
+ video_set_drvdata(&chan->video, chan);
+
+ /* Init host1x interface */
+ INIT_LIST_HEAD(&chan->client.list);
+ chan->client.dev = chan->vi->dev;
+
+ ret = host1x_client_register(&chan->client);
+ if (ret < 0) {
+ dev_err(chan->vi->dev, "failed to register host1x client: %d\n",
+ ret);
+ ret = -ENODEV;
+ goto host1x_register_error;
+ }
+
+ chan->sp = host1x_syncpt_request(chan->client.dev,
+ HOST1X_SYNCPT_HAS_BASE);
+ if (!chan->sp) {
+ dev_err(chan->vi->dev, "failed to request host1x syncpoint\n");
+ ret = -ENOMEM;
+ goto host1x_sp_error;
+ }
+
+ /* ... and the buffers queue... */
+ chan->alloc_ctx = vb2_dma_contig_init_ctx(&chan->video.dev);
+ if (IS_ERR(chan->alloc_ctx)) {
+ dev_err(chan->vi->dev, "failed to init vb2 buffer\n");
+ ret = -ENOMEM;
+ goto vb2_init_error;
+ }
+
+ chan->queue.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ chan->queue.io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ;
+ chan->queue.lock = &chan->video_lock;
+ chan->queue.drv_priv = chan;
+ chan->queue.buf_struct_size = sizeof(struct tegra_channel_buffer);
+ chan->queue.ops = &tegra_channel_queue_qops;
+ chan->queue.mem_ops = &vb2_dma_contig_memops;
+ chan->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC
+ | V4L2_BUF_FLAG_TSTAMP_SRC_EOF;
+ ret = vb2_queue_init(&chan->queue);
+ if (ret < 0) {
+ dev_err(chan->vi->dev, "failed to initialize VB2 queue\n");
+ goto vb2_queue_error;
+ }
+
+ ret = video_register_device(&chan->video, VFL_TYPE_GRABBER, -1);
+ if (ret < 0) {
+ dev_err(&chan->video.dev, "failed to register video device\n");
+ goto video_register_error;
+ }
+
+ return 0;
+
+video_register_error:
+ vb2_queue_release(&chan->queue);
+vb2_queue_error:
+ vb2_dma_contig_cleanup_ctx(chan->alloc_ctx);
+vb2_init_error:
+ host1x_syncpt_free(chan->sp);
+host1x_sp_error:
+ host1x_client_unregister(&chan->client);
+host1x_register_error:
+ media_entity_cleanup(&chan->video.entity);
+ return ret;
+}
+
+int tegra_channel_cleanup(struct tegra_channel *chan)
+{
+ video_unregister_device(&chan->video);
+
+ vb2_queue_release(&chan->queue);
+ vb2_dma_contig_cleanup_ctx(chan->alloc_ctx);
+
+ host1x_syncpt_free(chan->sp);
+ host1x_client_unregister(&chan->client);
+
+ media_entity_cleanup(&chan->video.entity);
+
+ return 0;
+}
diff --git a/drivers/media/platform/tegra/tegra-core.c
b/drivers/media/platform/tegra/tegra-core.c
new file mode 100644
index 0000000..450f78d
--- /dev/null
+++ b/drivers/media/platform/tegra/tegra-core.c
@@ -0,0 +1,254 @@
+/*
+ * NVIDIA Tegra Video Input Device Driver Core Helpers
+ *
+ * Copyright (c) 2015, NVIDIA CORPORATION. All rights reserved.
+ *
+ * Author: Bryan Wu <pe...@nvidia.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/export.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+
+#include "tegra-core.h"
+
+const struct tegra_video_format tegra_video_formats[] = {
+ /* RAW 6: TODO */
+
+ /* RAW 7: TODO */
+
+ /* RAW 8 */
+ {
+ TEGRA_VF_RAW8,
+ 8,
+ MEDIA_BUS_FMT_SRGGB8_1X8,
+ 1,
+ TEGRA_IMAGE_FORMAT_T_L8,
+ TEGRA_IMAGE_DT_RAW8,
+ V4L2_PIX_FMT_SRGGB8,
+ },
+ {
+ TEGRA_VF_RAW8,
+ 8,
+ MEDIA_BUS_FMT_SGRBG8_1X8,
+ 1,
+ TEGRA_IMAGE_FORMAT_T_L8,
+ TEGRA_IMAGE_DT_RAW8,
+ V4L2_PIX_FMT_SGRBG8,
+ },
+ {
+ TEGRA_VF_RAW8,
+ 8,
+ MEDIA_BUS_FMT_SGBRG8_1X8,
+ 1,
+ TEGRA_IMAGE_FORMAT_T_L8,
+ TEGRA_IMAGE_DT_RAW8,
+ V4L2_PIX_FMT_SGBRG8,
+ },
+ {
+ TEGRA_VF_RAW8,
+ 8,
+ MEDIA_BUS_FMT_SBGGR8_1X8,
+ 1,
+ TEGRA_IMAGE_FORMAT_T_L8,
+ TEGRA_IMAGE_DT_RAW8,
+ V4L2_PIX_FMT_SBGGR8,
+ },
+
+ /* RAW 10 */
+ {
+ TEGRA_VF_RAW10,
+ 10,
+ MEDIA_BUS_FMT_SRGGB10_1X10,
+ 2,
+ TEGRA_IMAGE_FORMAT_T_R16_I,
+ TEGRA_IMAGE_DT_RAW10,
+ V4L2_PIX_FMT_SRGGB10,
+ },
+ {
+ TEGRA_VF_RAW10,
+ 10,
+ MEDIA_BUS_FMT_SGRBG10_1X10,
+ 2,
+ TEGRA_IMAGE_FORMAT_T_R16_I,
+ TEGRA_IMAGE_DT_RAW10,
+ V4L2_PIX_FMT_SGRBG10,
+ },
+ {
+ TEGRA_VF_RAW10,
+ 10,
+ MEDIA_BUS_FMT_SGBRG10_1X10,
+ 2,
+ TEGRA_IMAGE_FORMAT_T_R16_I,
+ TEGRA_IMAGE_DT_RAW10,
+ V4L2_PIX_FMT_SGBRG10,
+ },
+ {
+ TEGRA_VF_RAW10,
+ 10,
+ MEDIA_BUS_FMT_SBGGR10_1X10,
+ 2,
+ TEGRA_IMAGE_FORMAT_T_R16_I,
+ TEGRA_IMAGE_DT_RAW10,
+ V4L2_PIX_FMT_SBGGR10,
+ },
+
+ /* RAW 12 */
+ {
+ TEGRA_VF_RAW12,
+ 12,
+ MEDIA_BUS_FMT_SRGGB12_1X12,
+ 2,
+ TEGRA_IMAGE_FORMAT_T_R16_I,
+ TEGRA_IMAGE_DT_RAW12,
+ V4L2_PIX_FMT_SRGGB12,
+ },
+ {
+ TEGRA_VF_RAW12,
+ 12,
+ MEDIA_BUS_FMT_SGRBG12_1X12,
+ 2,
+ TEGRA_IMAGE_FORMAT_T_R16_I,
+ TEGRA_IMAGE_DT_RAW12,
+ V4L2_PIX_FMT_SGRBG12,
+ },
+ {
+ TEGRA_VF_RAW12,
+ 12,
+ MEDIA_BUS_FMT_SGBRG12_1X12,
+ 2,
+ TEGRA_IMAGE_FORMAT_T_R16_I,
+ TEGRA_IMAGE_DT_RAW12,
+ V4L2_PIX_FMT_SGBRG12,
+ },
+ {
+ TEGRA_VF_RAW12,
+ 12,
+ MEDIA_BUS_FMT_SBGGR12_1X12,
+ 2,
+ TEGRA_IMAGE_FORMAT_T_R16_I,
+ TEGRA_IMAGE_DT_RAW12,
+ V4L2_PIX_FMT_SBGGR12,
+ },
+
+ /* RGB888 */
+ {
+ TEGRA_VF_RGB888,
+ 24,
+ MEDIA_BUS_FMT_RGB888_1X32_PADHI,
+ 4,
+ TEGRA_IMAGE_FORMAT_T_A8B8G8R8,
+ TEGRA_IMAGE_DT_RGB888,
+ V4L2_PIX_FMT_RGB32,
+ },
+};
+
+/*
-----------------------------------------------------------------------------
+ * Helper functions
+ */
+
+/**
+ * tegra_core_get_fourcc_by_idx - get fourcc of a tegra_video format
+ * @index: array index of the tegra_video_formats
+ *
+ * Return: fourcc code
+ */
+u32 tegra_core_get_fourcc_by_idx(unsigned int index)
+{
+ return tegra_video_formats[index].fourcc;
+}
+
+/**
+ * tegra_core_get_word_count - Calculate word count
+ * @frame_width: number of pixels per line
+ * @fmt: Tegra Video format struct which has BPP information
+ *
+ * Return: word count number
+ */
+u32 tegra_core_get_word_count(unsigned int frame_width,
+ const struct tegra_video_format *fmt)
+{
+ return frame_width * fmt->width / 8;
+}
+
+/**
+ * tegra_core_get_idx_by_code - Retrieve index for a media bus code
+ * @code: the format media bus code
+ *
+ * Return: a index to the format information structure corresponding to the
+ * given V4L2 media bus format @code, or -1 if no corresponding format can
+ * be found.
+ */
+int tegra_core_get_idx_by_code(unsigned int code)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(tegra_video_formats); ++i) {
+ if (tegra_video_formats[i].code == code)
+ return i;
+ }
+
+ return -1;
+}
+
+/**
+ * tegra_core_get_format_by_code - Retrieve format information for a media
+ * bus code
+ * @code: the format media bus code
+ *
+ * Return: a pointer to the format information structure corresponding to the
+ * given V4L2 media bus format @code, or NULL if no corresponding format can
+ * be found.
+ */
+const struct tegra_video_format *
+tegra_core_get_format_by_code(unsigned int code)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(tegra_video_formats); ++i) {
+ if (tegra_video_formats[i].code == code)
+ return &tegra_video_formats[i];
+ }
+
+ return NULL;
+}
+
+/**
+ * tegra_core_get_format_by_fourcc - Retrieve format information for a 4CC
+ * @fourcc: the format 4CC
+ *
+ * Return: a pointer to the format information structure corresponding to the
+ * given V4L2 format @fourcc, or NULL if no corresponding format can be
+ * found.
+ */
+const struct tegra_video_format *tegra_core_get_format_by_fourcc(u32 fourcc)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(tegra_video_formats); ++i) {
+ if (tegra_video_formats[i].fourcc == fourcc)
+ return &tegra_video_formats[i];
+ }
+
+ return NULL;
+}
+
+/**
+ * tegra_core_bytes_per_line - Calculate bytes per line in one frame
+ * @width: frame width
+ * @align: number of alignment bytes
+ * @fmt: Tegra Video format
+ *
+ * Simply calcualte the bytes_per_line and if it's not aligned it
+ * will be padded to alignment boundary.
+ */
+u32 tegra_core_bytes_per_line(unsigned int width, unsigned int align,
+ const struct tegra_video_format *fmt)
+{
+ return roundup(width * fmt->bpp, align);
+}
diff --git a/drivers/media/platform/tegra/tegra-core.h
b/drivers/media/platform/tegra/tegra-core.h
new file mode 100644
index 0000000..ea124cf
--- /dev/null
+++ b/drivers/media/platform/tegra/tegra-core.h
@@ -0,0 +1,162 @@
+/*
+ * NVIDIA Tegra Video Input Device Driver Core Helpers
+ *
+ * Copyright (c) 2015, NVIDIA CORPORATION. All rights reserved.
+ *
+ * Author: Bryan Wu <pe...@nvidia.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __TEGRA_CORE_H__
+#define __TEGRA_CORE_H__
+
+#include <media/v4l2-subdev.h>
+
+/* Minimum and maximum width and height common to Tegra video input device. */
+#define TEGRA_MIN_WIDTH 32U
+#define TEGRA_MAX_WIDTH 7680U
+#define TEGRA_MIN_HEIGHT 32U
+#define TEGRA_MAX_HEIGHT 7680U
+
+/* 1080p resolution as default resolution for test pattern generator */
+#define TEGRA_DEF_WIDTH 1920
+#define TEGRA_DEF_HEIGHT 1080
+
+#define TEGRA_VF_DEF MEDIA_BUS_FMT_SRGGB10_1X10
+
+/*
+ * These go into the TEGRA_VI_CSI_n_IMAGE_DEF registers bits 23:16
+ * Output pixel memory format for the VI channel.
+ */
+enum tegra_image_format {
+ TEGRA_IMAGE_FORMAT_T_L8 = 16,
+
+ TEGRA_IMAGE_FORMAT_T_R16_I = 32,
+ TEGRA_IMAGE_FORMAT_T_B5G6R5,
+ TEGRA_IMAGE_FORMAT_T_R5G6B5,
+ TEGRA_IMAGE_FORMAT_T_A1B5G5R5,
+ TEGRA_IMAGE_FORMAT_T_A1R5G5B5,
+ TEGRA_IMAGE_FORMAT_T_B5G5R5A1,
+ TEGRA_IMAGE_FORMAT_T_R5G5B5A1,
+ TEGRA_IMAGE_FORMAT_T_A4B4G4R4,
+ TEGRA_IMAGE_FORMAT_T_A4R4G4B4,
+ TEGRA_IMAGE_FORMAT_T_B4G4R4A4,
+ TEGRA_IMAGE_FORMAT_T_R4G4B4A4,
+
+ TEGRA_IMAGE_FORMAT_T_A8B8G8R8 = 64,
+ TEGRA_IMAGE_FORMAT_T_A8R8G8B8,
+ TEGRA_IMAGE_FORMAT_T_B8G8R8A8,
+ TEGRA_IMAGE_FORMAT_T_R8G8B8A8,
+ TEGRA_IMAGE_FORMAT_T_A2B10G10R10,
+ TEGRA_IMAGE_FORMAT_T_A2R10G10B10,
+ TEGRA_IMAGE_FORMAT_T_B10G10R10A2,
+ TEGRA_IMAGE_FORMAT_T_R10G10B10A2,
+
+ TEGRA_IMAGE_FORMAT_T_A8Y8U8V8 = 193,
+ TEGRA_IMAGE_FORMAT_T_V8U8Y8A8,
+
+ TEGRA_IMAGE_FORMAT_T_A2Y10U10V10 = 197,
+ TEGRA_IMAGE_FORMAT_T_V10U10Y10A2,
+ TEGRA_IMAGE_FORMAT_T_Y8_U8__Y8_V8,
+ TEGRA_IMAGE_FORMAT_T_Y8_V8__Y8_U8,
+ TEGRA_IMAGE_FORMAT_T_U8_Y8__V8_Y8,
+ TEGRA_IMAGE_FORMAT_T_T_V8_Y8__U8_Y8,
+
+ TEGRA_IMAGE_FORMAT_T_T_Y8__U8__V8_N444 = 224,
+ TEGRA_IMAGE_FORMAT_T_Y8__U8V8_N444,
+ TEGRA_IMAGE_FORMAT_T_Y8__V8U8_N444,
+ TEGRA_IMAGE_FORMAT_T_Y8__U8__V8_N422,
+ TEGRA_IMAGE_FORMAT_T_Y8__U8V8_N422,
+ TEGRA_IMAGE_FORMAT_T_Y8__V8U8_N422,
+ TEGRA_IMAGE_FORMAT_T_Y8__U8__V8_N420,
+ TEGRA_IMAGE_FORMAT_T_Y8__U8V8_N420,
+ TEGRA_IMAGE_FORMAT_T_Y8__V8U8_N420,
+ TEGRA_IMAGE_FORMAT_T_X2Lc10Lb10La10,
+ TEGRA_IMAGE_FORMAT_T_A2R6R6R6R6R6,
+};
+
+/*
+ * These go into the TEGRA_VI_CSI_n_CSI_IMAGE_DT registers bits 7:0
+ * Input data type of VI channel.
+ */
+enum tegra_image_dt {
+ TEGRA_IMAGE_DT_YUV420_8 = 24,
+ TEGRA_IMAGE_DT_YUV420_10,
+
+ TEGRA_IMAGE_DT_YUV420CSPS_8 = 28,
+ TEGRA_IMAGE_DT_YUV420CSPS_10,
+ TEGRA_IMAGE_DT_YUV422_8,
+ TEGRA_IMAGE_DT_YUV422_10,
+ TEGRA_IMAGE_DT_RGB444,
+ TEGRA_IMAGE_DT_RGB555,
+ TEGRA_IMAGE_DT_RGB565,
+ TEGRA_IMAGE_DT_RGB666,
+ TEGRA_IMAGE_DT_RGB888,
+
+ TEGRA_IMAGE_DT_RAW6 = 40,
+ TEGRA_IMAGE_DT_RAW7,
+ TEGRA_IMAGE_DT_RAW8,
+ TEGRA_IMAGE_DT_RAW10,
+ TEGRA_IMAGE_DT_RAW12,
+ TEGRA_IMAGE_DT_RAW14,
+};
+
+/* Supported CSI to VI Data Formats */
+enum tegra_vf_code {
+ TEGRA_VF_RAW6 = 0,
+ TEGRA_VF_RAW7,
+ TEGRA_VF_RAW8,
+ TEGRA_VF_RAW10,
+ TEGRA_VF_RAW12,
+ TEGRA_VF_RAW14,
+ TEGRA_VF_EMBEDDED8,
+ TEGRA_VF_RGB565,
+ TEGRA_VF_RGB555,
+ TEGRA_VF_RGB888,
+ TEGRA_VF_RGB444,
+ TEGRA_VF_RGB666,
+ TEGRA_VF_YUV422,
+ TEGRA_VF_YUV420,
+ TEGRA_VF_YUV420_CSPS,
+};
+
+/**
+ * struct tegra_video_format - Tegra video format description
+ * @vf_code: video format code
+ * @width: format width in bits per component
+ * @code: media bus format code
+ * @bpp: bytes per pixel (when stored in memory)
+ * @img_fmt: image format
+ * @img_dt: image data type
+ * @fourcc: V4L2 pixel format FCC identifier
+ * @description: format description, suitable for userspace
+ */
+struct tegra_video_format {
+ enum tegra_vf_code vf_code;
+ unsigned int width;
+ unsigned int code;
+ unsigned int bpp;
+ enum tegra_image_format img_fmt;
+ enum tegra_image_dt img_dt;
+ u32 fourcc;
+};
+
+u32 tegra_core_get_fourcc_by_idx(unsigned int index);
+u32 tegra_core_get_word_count(unsigned int frame_width,
+ const struct tegra_video_format *fmt);
+int tegra_core_get_idx_by_code(unsigned int code);
+const struct tegra_video_format *tegra_core_get_format_by_code(unsigned int
+ code);
+const struct tegra_video_format *tegra_core_get_format_by_fourcc(u32 fourcc);
+u32 tegra_core_bytes_per_line(unsigned int width, unsigned int align,
+ const struct tegra_video_format *fmt);
+int tegra_core_enum_mbus_code(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_mbus_code_enum *code);
+int tegra_core_enum_frame_size(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_frame_size_enum *fse);
+#endif
diff --git a/drivers/media/platform/tegra/tegra-csi.c
b/drivers/media/platform/tegra/tegra-csi.c
new file mode 100644
index 0000000..1af0c4e
--- /dev/null
+++ b/drivers/media/platform/tegra/tegra-csi.c
@@ -0,0 +1,560 @@
+/*
+ * NVIDIA Tegra CSI Device
+ *
+ * Copyright (c) 2015, NVIDIA CORPORATION. All rights reserved.
+ *
+ * Author: Bryan Wu <pe...@nvidia.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+
+#include <media/media-entity.h>
+#include <media/v4l2-async.h>
+#include <media/v4l2-ctrls.h>
+
+#include "tegra-vi.h"
+
+/* CSI Pixel Parser registers: Starts from 0x838, offset 0x0 */
+#define TEGRA_CSI_INPUT_STREAM_CONTROL 0x000
+#define CSI_SKIP_PACKET_THRESHOLD_OFFSET 16
+
+#define TEGRA_CSI_PIXEL_STREAM_CONTROL0 0x004
+#define CSI_PP_PACKET_HEADER_SENT (0x1 << 4)
+#define CSI_PP_DATA_IDENTIFIER_ENABLE (0x1 << 5)
+#define CSI_PP_WORD_COUNT_SELECT_HEADER (0x1 << 6)
+#define CSI_PP_CRC_CHECK_ENABLE (0x1 << 7)
+#define CSI_PP_WC_CHECK (0x1 << 8)
+#define CSI_PP_OUTPUT_FORMAT_STORE (0x3 << 16)
+#define CSI_PP_HEADER_EC_DISABLE (0x1 << 27)
+#define CSI_PPA_PAD_FRAME_NOPAD (0x2 << 28)
+
+#define TEGRA_CSI_PIXEL_STREAM_CONTROL1 0x008
+#define CSI_PP_TOP_FIELD_FRAME_OFFSET 0
+#define CSI_PP_TOP_FIELD_FRAME_MASK_OFFSET 4
+
+#define TEGRA_CSI_PIXEL_STREAM_GAP 0x00c
+#define PP_FRAME_MIN_GAP_OFFSET 16
+
+#define TEGRA_CSI_PIXEL_STREAM_PP_COMMAND 0x010
+#define CSI_PP_ENABLE 0x1
+#define CSI_PP_DISABLE 0x2
+#define CSI_PP_RST 0x3
+#define CSI_PP_SINGLE_SHOT_ENABLE (0x1 << 2)
+#define CSI_PP_START_MARKER_FRAME_MAX_OFFSET 12
+
+#define TEGRA_CSI_PIXEL_STREAM_EXPECTED_FRAME 0x014
+#define TEGRA_CSI_PIXEL_PARSER_INTERRUPT_MASK 0x018
+#define TEGRA_CSI_PIXEL_PARSER_STATUS 0x01c
+#define TEGRA_CSI_CSI_SW_SENSOR_RESET 0x020
+
+/* CSI PHY registers */
+#define TEGRA_CSI_PHY_CIL_COMMAND 0x0d0
+#define CSI_A_PHY_CIL_ENABLE 0x1
+#define CSI_B_PHY_CIL_ENABLE (0x1 << 8)
+
+/* CSI CIL registers: Starts from 0x92c, offset 0xF4 */
+#define TEGRA_CSI_CIL_OFFSET 0x0f4
+
+#define TEGRA_CSI_CIL_PAD_CONFIG0 0x000
+#define BRICK_CLOCK_A_4X (0x1 << 16)
+#define BRICK_CLOCK_B_4X (0x2 << 16)
+#define TEGRA_CSI_CIL_PAD_CONFIG1 0x004
+#define TEGRA_CSI_CIL_PHY_CONTROL 0x008
+#define TEGRA_CSI_CIL_INTERRUPT_MASK 0x00c
+#define TEGRA_CSI_CIL_STATUS 0x010
+#define TEGRA_CSI_CILX_STATUS 0x014
+#define TEGRA_CSI_CIL_ESCAPE_MODE_COMMAND 0x018
+#define TEGRA_CSI_CIL_ESCAPE_MODE_DATA 0x01c
+#define TEGRA_CSI_CIL_SW_SENSOR_RESET 0x020
+
+/* CSI Pattern Generator registers: Starts from 0x9c4, offset 0x18c */
+#define TEGRA_CSI_TPG_OFFSET 0x18c
+
+#define TEGRA_CSI_PATTERN_GENERATOR_CTRL 0x000
+#define PG_MODE_OFFSET 2
+#define PG_ENABLE 0x1
+
+#define TEGRA_CSI_PG_BLANK 0x004
+#define TEGRA_CSI_PG_PHASE 0x008
+#define TEGRA_CSI_PG_RED_FREQ 0x00c
+#define PG_RED_VERT_INIT_FREQ_OFFSET 16
+#define PG_RED_HOR_INIT_FREQ_OFFSET 0
+
+#define TEGRA_CSI_PG_RED_FREQ_RATE 0x010
+#define TEGRA_CSI_PG_GREEN_FREQ 0x014
+#define PG_GREEN_VERT_INIT_FREQ_OFFSET 16
+#define PG_GREEN_HOR_INIT_FREQ_OFFSET 0
+
+#define TEGRA_CSI_PG_GREEN_FREQ_RATE 0x018
+#define TEGRA_CSI_PG_BLUE_FREQ 0x01c
+#define PG_BLUE_VERT_INIT_FREQ_OFFSET 16
+#define PG_BLUE_HOR_INIT_FREQ_OFFSET 0
+
+#define TEGRA_CSI_PG_BLUE_FREQ_RATE 0x020
+#define TEGRA_CSI_PG_AOHDR 0x024
+
+#define TEGRA_CSI_DPCM_CTRL_A 0xa2c
+#define TEGRA_CSI_DPCM_CTRL_B 0xa30
+
+/* Other CSI registers: Starts from 0xa44, offset 0x20c */
+#define TEGRA_CSI_STALL_COUNTER 0x20c
+#define TEGRA_CSI_CSI_READONLY_STATUS 0x210
+#define TEGRA_CSI_CSI_SW_STATUS_RESET 0x214
+#define TEGRA_CSI_CLKEN_OVERRIDE 0x218
+#define TEGRA_CSI_DEBUG_CONTROL 0x21c
+#define TEGRA_CSI_DEBUG_COUNTER_0 0x220
+#define TEGRA_CSI_DEBUG_COUNTER_1 0x224
+#define TEGRA_CSI_DEBUG_COUNTER_2 0x228
+
+
+/* CSIA to CSIB register offset */
+#define TEGRA_CSI_PORT_OFFSET 0x34
+
+/* Each CSI has 2 ports, CSI_A and CSI_B */
+#define TEGRA_CSI_PORTS_NUM 2
+
+/* Each port has one source pad and one sink pad */
+#define TEGRA_CSI_PADS_NUM 4
+
+enum tegra_csi_port_num {
+ PORT_A = 0,
+ PORT_B = 1,
+};
+
+struct tegra_csi_port {
+ void __iomem *pixel_parser;
+ void __iomem *cil;
+ void __iomem *tpg;
+
+ /* One pair of sink/source pad has one format */
+ struct v4l2_mbus_framefmt format;
+ const struct tegra_video_format *core_format;
+ unsigned int lanes;
+
+ enum tegra_csi_port_num num;
+};
+
+struct tegra_csi_device {
+ struct v4l2_subdev subdev;
+ struct device *dev;
+ void __iomem *iomem;
+ struct clk *clk;
+
+ struct tegra_csi_port ports[TEGRA_CSI_PORTS_NUM];
+ struct media_pad pads[TEGRA_CSI_PADS_NUM];
+};
+
+static inline struct tegra_csi_device *to_csi(struct v4l2_subdev *subdev)
+{
+ return container_of(subdev, struct tegra_csi_device, subdev);
+}
+
+static void csi_write(struct tegra_csi_device *csi, unsigned int addr, u32 val)
+{
+ writel(val, csi->iomem + addr);
+}
+
+static u32 csi_read(struct tegra_csi_device *csi, unsigned int addr)
+{
+ return readl(csi->iomem + addr);
+}
+
+/* Pixel parser registers accessors */
+static void pp_write(struct tegra_csi_port *port, u32 addr, u32 val)
+{
+ writel(val, port->pixel_parser + addr);
+}
+
+static u32 pp_read(struct tegra_csi_port *port, u32 addr)
+{
+ return readl(port->pixel_parser + addr);
+}
+
+/* CSI CIL registers accessors */
+static void cil_write(struct tegra_csi_port *port, u32 addr, u32 val)
+{
+ writel(val, port->cil + addr);
+}
+
+static u32 cil_read(struct tegra_csi_port *port, u32 addr)
+{
+ return readl(port->cil + addr);
+}
+
+/* Test pattern generator registers accessor */
+static void tpg_write(struct tegra_csi_port *port, unsigned int addr, u32 val)
+{
+ writel(val, port->tpg + addr);
+}
+
+/*
-----------------------------------------------------------------------------
+ * V4L2 Subdevice Video Operations
+ */
+
+static int tegra_csi_s_stream(struct v4l2_subdev *subdev, int enable)
+{
+ struct tegra_csi_device *csi = to_csi(subdev);
+ struct tegra_channel *chan = subdev->host_priv;
+ enum tegra_csi_port_num port_num = (chan->port & 1) ? PORT_B : PORT_A;
+ struct tegra_csi_port *port = &csi->ports[port_num];
+ int ret;
+
+ if (enable) {
+ /* Start CIL clock */
+ ret = clk_set_rate(csi->clk, 102000000);
+ if (ret)
+ dev_err(csi->dev, "failed to set cil clk rate!\n");
+
+ ret = clk_prepare_enable(csi->clk);
+ if (ret) {
+ dev_err(csi->dev, "failed to enable cil clk!\n");
+ return ret;
+ }
+
+ csi_write(csi, TEGRA_CSI_CLKEN_OVERRIDE, 0);
+
+ /* Clean up status */
+ pp_write(port, TEGRA_CSI_PIXEL_PARSER_STATUS, 0xFFFFFFFF);
+ cil_write(port, TEGRA_CSI_CIL_STATUS, 0xFFFFFFFF);
+ cil_write(port, TEGRA_CSI_CILX_STATUS, 0xFFFFFFFF);
+
+ cil_write(port, TEGRA_CSI_CIL_INTERRUPT_MASK, 0x0);
+
+ /* CIL PHY registers setup */
+ cil_write(port, TEGRA_CSI_CIL_PAD_CONFIG0, 0x0);
+ cil_write(port, TEGRA_CSI_CIL_PHY_CONTROL, 0xA);
+
+ /*
+ * The CSI unit provides for connection of up to six cameras in
+ * the system and is organized as three identical instances of
+ * two MIPI support blocks, each with a separate 4-lane
+ * interface that can be configured as a single camera with 4
+ * lanes or as a dual camera with 2 lanes available for each
+ * camera.
+ */
+ if (port->lanes == 4) {
+ struct tegra_csi_port *port_a = &csi->ports[PORT_A];
+ struct tegra_csi_port *port_b = &csi->ports[PORT_B];
+
+ cil_write(port_a, TEGRA_CSI_CIL_PAD_CONFIG0,
+ BRICK_CLOCK_A_4X);
+ cil_write(port_b, TEGRA_CSI_CIL_INTERRUPT_MASK, 0x0);
+ cil_write(port_a, TEGRA_CSI_CIL_PHY_CONTROL, 0xA);
+ cil_write(port_b, TEGRA_CSI_CIL_PHY_CONTROL, 0xA);
+ csi_write(csi, TEGRA_CSI_PHY_CIL_COMMAND,
+ CSI_A_PHY_CIL_ENABLE | CSI_B_PHY_CIL_ENABLE);
+ } else {
+ u32 val = csi_read(csi, TEGRA_CSI_PHY_CIL_COMMAND);
+
+ val |= (port->num == PORT_A) ? CSI_A_PHY_CIL_ENABLE :
+ CSI_B_PHY_CIL_ENABLE;
+ csi_write(csi, TEGRA_CSI_PHY_CIL_COMMAND, val);
+ }
+
+ /* CSI pixel parser registers setup */
+ pp_write(port, TEGRA_CSI_PIXEL_STREAM_PP_COMMAND,
+ (0xF << CSI_PP_START_MARKER_FRAME_MAX_OFFSET) |
+ CSI_PP_SINGLE_SHOT_ENABLE | CSI_PP_RST);
+ pp_write(port, TEGRA_CSI_PIXEL_PARSER_INTERRUPT_MASK, 0x0);
+ pp_write(port, TEGRA_CSI_PIXEL_STREAM_CONTROL0,
+ CSI_PP_PACKET_HEADER_SENT |
+ CSI_PP_DATA_IDENTIFIER_ENABLE |
+ CSI_PP_WORD_COUNT_SELECT_HEADER |
+ CSI_PP_CRC_CHECK_ENABLE | CSI_PP_WC_CHECK |
+ CSI_PP_OUTPUT_FORMAT_STORE |
+ CSI_PP_HEADER_EC_DISABLE | CSI_PPA_PAD_FRAME_NOPAD |
+ (port->num & 1));
+ pp_write(port, TEGRA_CSI_PIXEL_STREAM_CONTROL1,
+ (0x1 << CSI_PP_TOP_FIELD_FRAME_OFFSET) |
+ (0x1 << CSI_PP_TOP_FIELD_FRAME_MASK_OFFSET));
+ pp_write(port, TEGRA_CSI_PIXEL_STREAM_GAP,
+ 0x14 << PP_FRAME_MIN_GAP_OFFSET);
+ pp_write(port, TEGRA_CSI_PIXEL_STREAM_EXPECTED_FRAME, 0x0);
+ pp_write(port, TEGRA_CSI_INPUT_STREAM_CONTROL,
+ (0x3f << CSI_SKIP_PACKET_THRESHOLD_OFFSET) |
+ (port->lanes - 1));
+
+ /* Test Pattern Generator setup */
+ if (chan->vi->pg_mode) {
+ tpg_write(port, TEGRA_CSI_PATTERN_GENERATOR_CTRL,
+ ((chan->vi->pg_mode - 1) << PG_MODE_OFFSET) |
+ PG_ENABLE);
+ tpg_write(port, TEGRA_CSI_PG_PHASE, 0x0);
+ tpg_write(port, TEGRA_CSI_PG_RED_FREQ,
+ (0x10 << PG_RED_VERT_INIT_FREQ_OFFSET) |
+ (0x10 << PG_RED_HOR_INIT_FREQ_OFFSET));
+ tpg_write(port, TEGRA_CSI_PG_RED_FREQ_RATE, 0x0);
+ tpg_write(port, TEGRA_CSI_PG_GREEN_FREQ,
+ (0x10 << PG_GREEN_VERT_INIT_FREQ_OFFSET) |
+ (0x10 << PG_GREEN_HOR_INIT_FREQ_OFFSET));
+ tpg_write(port, TEGRA_CSI_PG_GREEN_FREQ_RATE, 0x0);
+ tpg_write(port, TEGRA_CSI_PG_BLUE_FREQ,
+ (0x10 << PG_BLUE_VERT_INIT_FREQ_OFFSET) |
+ (0x10 << PG_BLUE_HOR_INIT_FREQ_OFFSET));
+ tpg_write(port, TEGRA_CSI_PG_BLUE_FREQ_RATE, 0x0);
+ }
+
+ pp_write(port, TEGRA_CSI_PIXEL_STREAM_PP_COMMAND,
+ (0xF << CSI_PP_START_MARKER_FRAME_MAX_OFFSET) |
+ CSI_PP_SINGLE_SHOT_ENABLE | CSI_PP_ENABLE);
+ } else {
+ u32 val = pp_read(port, TEGRA_CSI_PIXEL_PARSER_STATUS);
+
+ dev_dbg(csi->dev, "TEGRA_CSI_PIXEL_PARSER_STATUS 0x%08x\n",
+ val);
+
+ val = cil_read(port, TEGRA_CSI_CIL_STATUS);
+ dev_dbg(csi->dev, "TEGRA_CSI_CIL_STATUS 0x%08x\n", val);
+
+ val = cil_read(port, TEGRA_CSI_CILX_STATUS);
+ dev_dbg(csi->dev, "TEGRA_CSI_CILX_STATUS 0x%08x\n", val);
+
+#ifdef DEBUG
+ val = csi_read(csi, TEGRA_CSI_DEBUG_COUNTER_0);
+ dev_err(&csi->dev, "TEGRA_CSI_DEBUG_COUNTER_0 0x%08x\n", val);
+#endif
+
+ pp_write(port, TEGRA_CSI_PIXEL_STREAM_PP_COMMAND,
+ (0xF << CSI_PP_START_MARKER_FRAME_MAX_OFFSET) |
+ CSI_PP_DISABLE);
+
+ clk_disable_unprepare(csi->clk);
+ }
+
+ return 0;
+}
+
+
+/*
-----------------------------------------------------------------------------
+ * V4L2 Subdevice Pad Operations
+ */
+
+static struct v4l2_mbus_framefmt *
+__tegra_csi_get_pad_format(struct tegra_csi_device *csi,
+ struct v4l2_subdev_pad_config *cfg,
+ unsigned int pad, u32 which)
+{
+ enum tegra_csi_port_num port_num = pad < 2 ? PORT_A : PORT_B;
+
+ switch (which) {
+ case V4L2_SUBDEV_FORMAT_TRY:
+ return v4l2_subdev_get_try_format(&csi->subdev, cfg, pad);
+ case V4L2_SUBDEV_FORMAT_ACTIVE:
+ return &csi->ports[port_num].format;
+ default:
+ return NULL;
+ }
+}
+
+static int tegra_csi_get_format(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct tegra_csi_device *csi = to_csi(subdev);
+
+ fmt->format = *__tegra_csi_get_pad_format(csi, cfg,
+ fmt->pad, fmt->which);
+ return 0;
+}
+
+static int tegra_csi_set_format(struct v4l2_subdev *subdev,
+ struct v4l2_subdev_pad_config *cfg,
+ struct v4l2_subdev_format *fmt)
+{
+ struct tegra_csi_device *csi = to_csi(subdev);
+ struct v4l2_mbus_framefmt *__format;
+ enum tegra_csi_port_num port_num = fmt->pad < 2 ? PORT_A : PORT_B;
+
+ __format = __tegra_csi_get_pad_format(csi, cfg, fmt->pad, fmt->which);
+ if (__format)
+ csi->ports[port_num].format = *__format;
+
+ return 0;
+}
+
+/*
-----------------------------------------------------------------------------
+ * V4L2 Subdevice Operations
+ */
+static struct v4l2_subdev_video_ops tegra_csi_video_ops = {
+ .s_stream = tegra_csi_s_stream,
+};
+
+static struct v4l2_subdev_pad_ops tegra_csi_pad_ops = {
+ .get_fmt = tegra_csi_get_format,
+ .set_fmt = tegra_csi_set_format,
+};
+
+static struct v4l2_subdev_ops tegra_csi_ops = {
+ .video = &tegra_csi_video_ops,
+ .pad = &tegra_csi_pad_ops,
+};
+
+/*
-----------------------------------------------------------------------------
+ * Media Operations
+ */
+
+static const struct media_entity_operations tegra_csi_media_ops = {
+ .link_validate = v4l2_subdev_link_validate,
+};
+
+/*
-----------------------------------------------------------------------------
+ * Platform Device Driver
+ */
+
+static int tegra_csi_parse_of(struct tegra_csi_device *csi)
+{
+ struct device_node *node = csi->dev->of_node;
+ struct device_node *ports;
+ struct device_node *port;
+ struct device_node *ep;
+ unsigned int lanes, pad_num, port_num;
+ int ret;
+
+ ports = of_get_child_by_name(node, "ports");
+ if (ports == NULL)
+ ports = node;
+
+ for_each_child_of_node(ports, port) {
+ if (!port->name || of_node_cmp(port->name, "port"))
+ continue;
+
+ ret = of_property_read_u32(port, "reg", &pad_num);
+ if (ret < 0)
+ continue;
+ port_num = pad_num < 2 ? PORT_A : PORT_B;
+ csi->ports[port_num].num = port_num;
+
+ for_each_child_of_node(port, ep) {
+ if (!ep->name || of_node_cmp(ep->name, "endpoint"))
+ continue;
+
+ /* Get number of data lanes for the first endpoint */
+ ret = of_property_read_u32(ep, "bus-width", &lanes);
+ if (ret < 0)
+ lanes = 4;
+ csi->ports[port_num].lanes = lanes;
+ }
+ }
+
+ return 0;
+}
+
+static int tegra_csi_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ struct v4l2_subdev *subdev;
+ struct tegra_csi_device *csi;
+ int ret, i;
+
+ csi = devm_kzalloc(&pdev->dev, sizeof(*csi), GFP_KERNEL);
+ if (!csi)
+ return -ENOMEM;
+
+ csi->dev = &pdev->dev;
+
+ ret = tegra_csi_parse_of(csi);
+ if (ret < 0)
+ return ret;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ csi->iomem = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(csi->iomem))
+ return PTR_ERR(csi->iomem);
+
+ csi->clk = devm_clk_get(&pdev->dev, "cil");
+ if (IS_ERR(csi->clk)) {
+ dev_err(&pdev->dev, "Failed to get cil clock\n");
+ return PTR_ERR(csi->clk);
+ }
+
+ /* Initialize V4L2 subdevice and media entity */
+ subdev = &csi->subdev;
+ v4l2_subdev_init(subdev, &tegra_csi_ops);
+ subdev->dev = &pdev->dev;
+ strlcpy(subdev->name, dev_name(&pdev->dev), sizeof(subdev->name));
+ v4l2_set_subdevdata(subdev, csi);
+ subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+ subdev->entity.ops = &tegra_csi_media_ops;
+
+ for (i = 0; i < TEGRA_CSI_PORTS_NUM; i++) {
+ /* Initialize the default format */
+ csi->ports[i].format.code = TEGRA_VF_DEF;
+ csi->ports[i].format.field = V4L2_FIELD_NONE;
+ csi->ports[i].format.colorspace = V4L2_COLORSPACE_SRGB;
+ csi->ports[i].format.width = TEGRA_DEF_WIDTH;
+ csi->ports[i].format.height = TEGRA_DEF_HEIGHT;
+
+ /* Initialize port register bases */
+ csi->ports[i].pixel_parser = csi->iomem +
+ (i & 1) * TEGRA_CSI_PORT_OFFSET;
+ csi->ports[i].cil = csi->iomem + TEGRA_CSI_CIL_OFFSET +
+ (i & 1) * TEGRA_CSI_PORT_OFFSET;
+ csi->ports[i].tpg = csi->iomem + TEGRA_CSI_TPG_OFFSET +
+ (i & 1) * TEGRA_CSI_PORT_OFFSET;
+
+ csi->ports[i].num = i;
+
+ csi->pads[i * 2].flags = MEDIA_PAD_FL_SINK;
+ csi->pads[i * 2 + 1].flags = MEDIA_PAD_FL_SOURCE;
+ }
+
+ /* Initialize media entity */
+ ret = media_entity_init(&subdev->entity, ARRAY_SIZE(csi->pads),
+ csi->pads, 0);
+ if (ret < 0)
+ return ret;
+
+ platform_set_drvdata(pdev, csi);
+
+ ret = v4l2_async_register_subdev(subdev);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to register subdev\n");
+ goto error;
+ }
+
+ return 0;
+
+error:
+ media_entity_cleanup(&subdev->entity);
+ return ret;
+}
+
+static int tegra_csi_remove(struct platform_device *pdev)
+{
+ struct tegra_csi_device *csi = platform_get_drvdata(pdev);
+ struct v4l2_subdev *subdev = &csi->subdev;
+
+ v4l2_async_unregister_subdev(subdev);
+ media_entity_cleanup(&subdev->entity);
+ return 0;
+}
+
+static const struct of_device_id tegra_csi_of_id_table[] = {
+ { .compatible = "nvidia,tegra210-csi" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, tegra_csi_of_id_table);
+
+static struct platform_driver tegra_csi_driver = {
+ .driver = {
+ .name = "tegra-csi",
+ .of_match_table = tegra_csi_of_id_table,
+ },
+ .probe = tegra_csi_probe,
+ .remove = tegra_csi_remove,
+};
+module_platform_driver(tegra_csi_driver);
+
+MODULE_AUTHOR("Bryan Wu <pe...@nvidia.com>");
+MODULE_DESCRIPTION("NVIDIA Tegra CSI Device Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/media/platform/tegra/tegra-vi.c
b/drivers/media/platform/tegra/tegra-vi.c
new file mode 100644
index 0000000..6cc7395
--- /dev/null
+++ b/drivers/media/platform/tegra/tegra-vi.c
@@ -0,0 +1,732 @@
+/*
+ * NVIDIA Tegra Video Input Device
+ *
+ * Copyright (c) 2015, NVIDIA CORPORATION. All rights reserved.
+ *
+ * Author: Bryan Wu <pe...@nvidia.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/clk.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+#include <linux/reset.h>
+#include <linux/slab.h>
+
+#include <media/media-device.h>
+#include <media/v4l2-async.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-of.h>
+
+#include <soc/tegra/pmc.h>
+
+#include "tegra-vi.h"
+
+/* In TPG mode, VI only support 2 formats */
+static void vi_tpg_fmts_bitmap_init(struct tegra_vi *vi)
+{
+ int index;
+
+ bitmap_zero(vi->tpg_fmts_bitmap, MAX_FORMAT_NUM);
+
+ index = tegra_core_get_idx_by_code(MEDIA_BUS_FMT_SRGGB10_1X10);
+ bitmap_set(vi->tpg_fmts_bitmap, index, 1);
+
+ index = tegra_core_get_idx_by_code(MEDIA_BUS_FMT_RGB888_1X32_PADHI);
+ bitmap_set(vi->tpg_fmts_bitmap, index, 1);
+}
+
+/*
+ * Control Config
+ */
+
+static const char *const vi_pattern_strings[] = {
+ "Disabled",
+ "Black/White Direct Mode",
+ "Color Patch Mode",
+};
+
+static int vi_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct tegra_vi *vi = container_of(ctrl->handler, struct tegra_vi,
+ ctrl_handler);
+ switch (ctrl->id) {
+ case V4L2_CID_TEST_PATTERN:
+ vi->pg_mode = ctrl->val;
+ break;
+ }
+
+ return 0;
+}
+
+static const struct v4l2_ctrl_ops vi_ctrl_ops = {
+ .s_ctrl = vi_s_ctrl,
+};
+
+/*
-----------------------------------------------------------------------------
+ * Media Controller and V4L2
+ */
+
+static void tegra_vi_v4l2_cleanup(struct tegra_vi *vi)
+{
+ v4l2_ctrl_handler_free(&vi->ctrl_handler);
+ v4l2_device_unregister(&vi->v4l2_dev);
+ media_device_unregister(&vi->media_dev);
+}
+
+static int tegra_vi_v4l2_init(struct tegra_vi *vi)
+{
+ int ret;
+
+ vi->media_dev.dev = vi->dev;
+ strlcpy(vi->media_dev.model, "NVIDIA Tegra Video Input Device",
+ sizeof(vi->media_dev.model));
+ vi->media_dev.hw_revision = 3;
+
+ ret = media_device_register(&vi->media_dev);
+ if (ret < 0) {
+ dev_err(vi->dev, "media device registration failed (%d)\n",
+ ret);
+ return ret;
+ }
+
+ vi->v4l2_dev.mdev = &vi->media_dev;
+ ret = v4l2_device_register(vi->dev, &vi->v4l2_dev);
+ if (ret < 0) {
+ dev_err(vi->dev, "V4L2 device registration failed (%d)\n",
+ ret);
+ goto register_error;
+ }
+
+ v4l2_ctrl_handler_init(&vi->ctrl_handler, 1);
+ vi->pattern = v4l2_ctrl_new_std_menu_items(&vi->ctrl_handler,
+ &vi_ctrl_ops, V4L2_CID_TEST_PATTERN,
+ ARRAY_SIZE(vi_pattern_strings) - 1,
+ 0, 0, vi_pattern_strings);
+
+ if (vi->ctrl_handler.error) {
+ dev_err(vi->dev, "failed to add controls\n");
+ ret = vi->ctrl_handler.error;
+ goto ctrl_error;
+ }
+ vi->v4l2_dev.ctrl_handler = &vi->ctrl_handler;
+
+ ret = v4l2_ctrl_handler_setup(&vi->ctrl_handler);
+ if (ret < 0) {
+ dev_err(vi->dev, "failed to set controls\n");
+ goto ctrl_error;
+ }
+ return 0;
+
+
+ctrl_error:
+ v4l2_ctrl_handler_free(&vi->ctrl_handler);
+ v4l2_device_unregister(&vi->v4l2_dev);
+register_error:
+ media_device_unregister(&vi->media_dev);
+ return ret;
+}
+
+/*
-----------------------------------------------------------------------------
+ * Platform Device Driver
+ */
+
+int tegra_vi_power_on(struct tegra_vi *vi)
+{
+ int ret;
+
+ ret = regulator_enable(vi->vi_reg);
+ if (ret)
+ return ret;
+
+ ret = tegra_powergate_sequence_power_up(TEGRA_POWERGATE_VENC,
+ vi->vi_clk, vi->vi_rst);
+ if (ret) {
+ dev_err(vi->dev, "failed to power up!\n");
+ goto error_power_up;
+ }
+
+ ret = clk_set_rate(vi->vi_clk, 408000000);
+ if (ret) {
+ dev_err(vi->dev, "failed to set vi clock to 408MHz!\n");
+ goto error_clk_set_rate;
+ }
+
+ clk_prepare_enable(vi->csi_clk);
+
+ return 0;
+
+error_clk_set_rate:
+ tegra_powergate_power_off(TEGRA_POWERGATE_VENC);
+error_power_up:
+ regulator_disable(vi->vi_reg);
+ return ret;
+}
+
+void tegra_vi_power_off(struct tegra_vi *vi)
+{
+ reset_control_assert(vi->vi_rst);
+ clk_disable_unprepare(vi->vi_clk);
+ clk_disable_unprepare(vi->csi_clk);
+ tegra_powergate_power_off(TEGRA_POWERGATE_VENC);
+ regulator_disable(vi->vi_reg);
+}
+
+static int tegra_vi_channels_init(struct tegra_vi *vi)
+{
+ unsigned int i;
+ int ret;
+
+ for (i = 0; i < ARRAY_SIZE(vi->chans); i++) {
+ ret = tegra_channel_init(vi, i);
+ if (ret < 0) {
+ dev_err(vi->dev, "channel %d init failed\n", i);
+ return ret;
+ }
+ }
+ return 0;
+}
+
+static int tegra_vi_channels_cleanup(struct tegra_vi *vi)
+{
+ unsigned int i;
+ int ret;
+
+ for (i = 0; i < ARRAY_SIZE(vi->chans); i++) {
+ ret = tegra_channel_cleanup(&vi->chans[i]);
+ if (ret < 0) {
+ dev_err(vi->dev, "channel %d cleanup failed\n", i);
+ return ret;
+ }
+ }
+ return 0;
+}
+
+/*
-----------------------------------------------------------------------------
+ * Graph Management
+ */
+
+static struct tegra_vi_graph_entity *
+tegra_vi_graph_find_entity(struct tegra_vi *vi,
+ const struct device_node *node)
+{
+ struct tegra_vi_graph_entity *entity;
+
+ list_for_each_entry(entity, &vi->entities, list) {
+ if (entity->node == node)
+ return entity;
+ }
+
+ return NULL;
+}
+
+static int tegra_vi_graph_build_one(struct tegra_vi *vi,
+ struct tegra_vi_graph_entity *entity)
+{
+ u32 link_flags = MEDIA_LNK_FL_ENABLED;
+ struct media_entity *local = entity->entity;
+ struct media_entity *remote;
+ struct media_pad *local_pad;
+ struct media_pad *remote_pad;
+ struct tegra_vi_graph_entity *ent;
+ struct v4l2_of_link link;
+ struct device_node *ep = NULL;
+ struct device_node *next;
+ int ret = 0;
+
+ dev_dbg(vi->dev, "creating links for entity %s\n", local->name);
+
+ while (1) {
+ /* Get the next endpoint and parse its link. */
+ next = of_graph_get_next_endpoint(entity->node, ep);
+ if (next == NULL)
+ break;
+
+ of_node_put(ep);
+ ep = next;
+
+ dev_dbg(vi->dev, "processing endpoint %s\n", ep->full_name);
+
+ ret = v4l2_of_parse_link(ep, &link);
+ if (ret < 0) {
+ dev_err(vi->dev, "failed to parse link for %s\n",
+ ep->full_name);
+ continue;
+ }
+
+ /* Skip sink ports, they will be processed from the other end of
+ * the link.
+ */
+ if (link.local_port >= local->num_pads) {
+ dev_err(vi->dev, "invalid port number %u on %s\n",
+ link.local_port, link.local_node->full_name);
+ v4l2_of_put_link(&link);
+ ret = -EINVAL;
+ break;
+ }
+
+ local_pad = &local->pads[link.local_port];
+
+ if (local_pad->flags & MEDIA_PAD_FL_SINK) {
+ dev_dbg(vi->dev, "skipping sink port %s:%u\n",
+ link.local_node->full_name, link.local_port);
+ v4l2_of_put_link(&link);
+ continue;
+ }
+
+ /* Skip channel entity , they will be processed separately. */
+ if (link.remote_node == vi->dev->of_node) {
+ dev_dbg(vi->dev, "skipping channel port %s:%u\n",
+ link.local_node->full_name, link.local_port);
+ v4l2_of_put_link(&link);
+ continue;
+ }
+
+ /* Find the remote entity. */
+ ent = tegra_vi_graph_find_entity(vi, link.remote_node);
+ if (ent == NULL) {
+ dev_err(vi->dev, "no entity found for %s\n",
+ link.remote_node->full_name);
+ v4l2_of_put_link(&link);
+ ret = -ENODEV;
+ break;
+ }
+
+ remote = ent->entity;
+
+ if (link.remote_port >= remote->num_pads) {
+ dev_err(vi->dev, "invalid port number %u on %s\n",
+ link.remote_port, link.remote_node->full_name);
+ v4l2_of_put_link(&link);
+ ret = -EINVAL;
+ break;
+ }
+
+ remote_pad = &remote->pads[link.remote_port];
+
+ v4l2_of_put_link(&link);
+
+ /* Create the media link. */
+ dev_dbg(vi->dev, "creating %s:%u -> %s:%u link\n",
+ local->name, local_pad->index,
+ remote->name, remote_pad->index);
+
+ ret = media_entity_create_link(local, local_pad->index,
+ remote, remote_pad->index,
+ link_flags);
+ if (ret < 0) {
+ dev_err(vi->dev,
+ "failed to create %s:%u -> %s:%u link\n",
+ local->name, local_pad->index,
+ remote->name, remote_pad->index);
+ break;
+ }
+ }
+
+ of_node_put(ep);
+ return ret;
+}
+
+static int tegra_vi_graph_build_links(struct tegra_vi *vi)
+{
+ u32 link_flags = MEDIA_LNK_FL_ENABLED;
+ struct device_node *node = vi->dev->of_node;
+ struct media_entity *source;
+ struct media_entity *sink;
+ struct media_pad *source_pad;
+ struct media_pad *sink_pad;
+ struct tegra_vi_graph_entity *ent;
+ struct v4l2_of_link link;
+ struct device_node *ep = NULL;
+ struct device_node *next;
+ struct tegra_channel *chan;
+ int ret = 0;
+
+ dev_dbg(vi->dev, "creating links for channels\n");
+
+ while (1) {
+ /* Get the next endpoint and parse its link. */
+ next = of_graph_get_next_endpoint(node, ep);
+ if (next == NULL)
+ break;
+
+ of_node_put(ep);
+ ep = next;
+
+ dev_dbg(vi->dev, "processing endpoint %s\n", ep->full_name);
+
+ ret = v4l2_of_parse_link(ep, &link);
+ if (ret < 0) {
+ dev_err(vi->dev, "failed to parse link for %s\n",
+ ep->full_name);
+ continue;
+ }
+
+ if (link.local_port > MAX_CHAN_NUM) {
+ dev_err(vi->dev, "wrong channel number for port %u\n",
+ link.local_port);
+ v4l2_of_put_link(&link);
+ ret = -EINVAL;
+ break;
+ }
+
+ chan = &vi->chans[link.local_port];
+
+ dev_dbg(vi->dev, "creating link for channel %s\n",
+ chan->video.name);
+
+ /* Find the remote entity. */
+ ent = tegra_vi_graph_find_entity(vi, link.remote_node);
+ if (ent == NULL) {
+ dev_err(vi->dev, "no entity found for %s\n",
+ link.remote_node->full_name);
+ v4l2_of_put_link(&link);
+ ret = -ENODEV;
+ break;
+ }
+
+ source = ent->entity;
+ source_pad = &source->pads[link.remote_port];
+ sink = &chan->video.entity;
+ sink_pad = &chan->pad;
+
+ v4l2_of_put_link(&link);
+
+ /* Create the media link. */
+ dev_dbg(vi->dev, "creating %s:%u -> %s:%u link\n",
+ source->name, source_pad->index,
+ sink->name, sink_pad->index);
+
+ ret = media_entity_create_link(source, source_pad->index,
+ sink, sink_pad->index,
+ link_flags);
+ if (ret < 0) {
+ dev_err(vi->dev,
+ "failed to create %s:%u -> %s:%u link\n",
+ source->name, source_pad->index,
+ sink->name, sink_pad->index);
+ break;
+ }
+
+ tegra_channel_fmts_bitmap_init(chan, ent);
+ }
+
+ of_node_put(ep);
+ return ret;
+}
+
+static int tegra_vi_graph_notify_complete(struct v4l2_async_notifier *notifier)
+{
+ struct tegra_vi *vi =
+ container_of(notifier, struct tegra_vi, notifier);
+ struct tegra_vi_graph_entity *entity;
+ int ret;
+
+ dev_dbg(vi->dev, "notify complete, all subdevs registered\n");
+
+ /* Create links for every entity. */
+ list_for_each_entry(entity, &vi->entities, list) {
+ ret = tegra_vi_graph_build_one(vi, entity);
+ if (ret < 0)
+ return ret;
+ }
+
+ /* Create links for channels */
+ ret = tegra_vi_graph_build_links(vi);
+ if (ret < 0)
+ return ret;
+
+ ret = v4l2_device_register_subdev_nodes(&vi->v4l2_dev);
+ if (ret < 0)
+ dev_err(vi->dev, "failed to register subdev nodes\n");
+
+ return ret;
+}
+
+static int tegra_vi_graph_notify_bound(struct v4l2_async_notifier *notifier,
+ struct v4l2_subdev *subdev,
+ struct v4l2_async_subdev *asd)
+{
+ struct tegra_vi *vi = container_of(notifier, struct tegra_vi, notifier);
+ struct tegra_vi_graph_entity *entity;
+
+ /* Locate the entity corresponding to the bound subdev and store the
+ * subdev pointer.
+ */
+ list_for_each_entry(entity, &vi->entities, list) {
+ if (entity->node != subdev->dev->of_node)
+ continue;
+
+ if (entity->subdev) {
+ dev_err(vi->dev, "duplicate subdev for node %s\n",
+ entity->node->full_name);
+ return -EINVAL;
+ }
+
+ dev_dbg(vi->dev, "subdev %s bound\n", subdev->name);
+ entity->entity = &subdev->entity;
+ entity->subdev = subdev;
+ return 0;
+ }
+
+ dev_err(vi->dev, "no entity for subdev %s\n", subdev->name);
+ return -EINVAL;
+}
+
+static void tegra_vi_graph_cleanup(struct tegra_vi *vi)
+{
+ struct tegra_vi_graph_entity *entityp;
+ struct tegra_vi_graph_entity *entity;
+
+ v4l2_async_notifier_unregister(&vi->notifier);
+
+ list_for_each_entry_safe(entity, entityp, &vi->entities, list) {
+ of_node_put(entity->node);
+ list_del(&entity->list);
+ }
+}
+
+
+static int tegra_vi_graph_parse_one(struct tegra_vi *vi,
+ struct device_node *node)
+{
+ struct device_node *ep = NULL;
+ struct device_node *next;
+ struct device_node *remote = NULL;
+ struct tegra_vi_graph_entity *entity;
+ int ret = 0;
+
+ dev_dbg(vi->dev, "parsing node %s\n", node->full_name);
+
+ /* Parse all the remote entities and put them into the list */
+ while (1) {
+ next = of_graph_get_next_endpoint(node, ep);
+ if (!next)
+ break;
+
+ of_node_put(ep);
+ ep = next;
+
+ dev_dbg(vi->dev, "handling endpoint %s\n", ep->full_name);
+
+ remote = of_graph_get_remote_port_parent(ep);
+ if (!remote) {
+ ret = -EINVAL;
+ break;
+ }
+
+ /* Skip entities that we have already processed. */
+ if (remote == vi->dev->of_node ||
+ tegra_vi_graph_find_entity(vi, remote)) {
+ of_node_put(remote);
+ continue;
+ }
+
+ entity = devm_kzalloc(vi->dev, sizeof(*entity),
+ GFP_KERNEL);
+ if (entity == NULL) {
+ of_node_put(remote);
+ ret = -ENOMEM;
+ break;
+ }
+
+ entity->node = remote;
+ entity->asd.match_type = V4L2_ASYNC_MATCH_OF;
+ entity->asd.match.of.node = remote;
+ list_add_tail(&entity->list, &vi->entities);
+ vi->num_subdevs++;
+ }
+
+ of_node_put(ep);
+ return ret;
+}
+
+
+static int tegra_vi_graph_init(struct tegra_vi *vi)
+{
+ struct tegra_vi_graph_entity *entity;
+ struct v4l2_async_subdev **subdevs = NULL;
+ unsigned int num_subdevs = 0;
+ int ret = 0, i;
+
+ /*
+ * Walk the links to parse the full graph. Start by parsing the
+ * composite node and then parse entities in turn. The list_for_each
+ * loop will handle entities added at the end of the list while walking
+ * the links.
+ */
+ ret = tegra_vi_graph_parse_one(vi, vi->dev->of_node);
+ if (ret < 0)
+ return 0;
+
+ list_for_each_entry(entity, &vi->entities, list) {
+ ret = tegra_vi_graph_parse_one(vi, entity->node);
+ if (ret < 0)
+ break;
+ }
+
+ if (!vi->num_subdevs) {
+ dev_warn(vi->dev, "no subdev found in graph\n");
+ goto done;
+ }
+
+ /*
+ * VI has at least MAX_CHAN_NUM / 2 subdevices for CSI blocks.
+ * If just found CSI subdevices connecting to VI, VI has no sensors
+ * described in DT but has to use test pattern generator mode.
+ * Otherwise VI has sensors connecting.
+ */
+ vi->has_sensors = (vi->num_subdevs > MAX_CHAN_NUM / 2);
+ if (!vi->has_sensors)
+ dev_dbg(vi->dev, "has no sensors connected!\n");
+
+ /* Register the subdevices notifier. */
+ num_subdevs = vi->num_subdevs;
+ subdevs = devm_kzalloc(vi->dev, sizeof(*subdevs) * num_subdevs,
+ GFP_KERNEL);
+ if (subdevs == NULL) {
+ ret = -ENOMEM;
+ goto done;
+ }
+
+ i = 0;
+ list_for_each_entry(entity, &vi->entities, list)
+ subdevs[i++] = &entity->asd;
+
+ vi->notifier.subdevs = subdevs;
+ vi->notifier.num_subdevs = num_subdevs;
+ vi->notifier.bound = tegra_vi_graph_notify_bound;
+ vi->notifier.complete = tegra_vi_graph_notify_complete;
+
+ ret = v4l2_async_notifier_register(&vi->v4l2_dev, &vi->notifier);
+ if (ret < 0) {
+ dev_err(vi->dev, "notifier registration failed\n");
+ goto done;
+ }
+
+ return 0;
+
+done:
+ if (ret < 0)
+ tegra_vi_graph_cleanup(vi);
+
+ return ret;
+}
+
+static int tegra_vi_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ struct tegra_vi *vi;
+ int ret = 0;
+
+ vi = devm_kzalloc(&pdev->dev, sizeof(*vi), GFP_KERNEL);
+ if (!vi)
+ return -ENOMEM;
+
+ vi->dev = &pdev->dev;
+ INIT_LIST_HEAD(&vi->entities);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ vi->iomem = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(vi->iomem))
+ return PTR_ERR(vi->iomem);
+
+ vi->vi_rst = devm_reset_control_get(&pdev->dev, "vi");
+ if (IS_ERR(vi->vi_rst)) {
+ dev_err(&pdev->dev, "Failed to get vi reset\n");
+ return PTR_ERR(vi->vi_rst);
+ }
+
+ vi->vi_clk = devm_clk_get(&pdev->dev, "vi");
+ if (IS_ERR(vi->vi_clk)) {
+ dev_err(&pdev->dev, "Failed to get vi clock\n");
+ return PTR_ERR(vi->vi_clk);
+ }
+
+ vi->parent_clk = devm_clk_get(&pdev->dev, "parent");
+ if (IS_ERR(vi->parent_clk)) {
+ dev_err(&pdev->dev, "Failed to get VI parent clock\n");
+ return PTR_ERR(vi->parent_clk);
+ }
+
+ ret = clk_set_parent(vi->vi_clk, vi->parent_clk);
+ if (ret < 0)
+ return ret;
+
+ vi->csi_clk = devm_clk_get(&pdev->dev, "csi");
+ if (IS_ERR(vi->csi_clk)) {
+ dev_err(&pdev->dev, "Failed to get csi clock\n");
+ return PTR_ERR(vi->csi_clk);
+ }
+
+ vi->vi_reg = devm_regulator_get(&pdev->dev, "avdd-dsi-csi");
+ if (IS_ERR(vi->vi_reg)) {
+ dev_err(&pdev->dev, "Failed to get avdd-dsi-csi regulators\n");
+ return -EPROBE_DEFER;
+ }
+
+ vi_tpg_fmts_bitmap_init(vi);
+
+ ret = tegra_vi_v4l2_init(vi);
+ if (ret < 0)
+ return ret;
+
+ /* Init Tegra VI channels */
+ ret = tegra_vi_channels_init(vi);
+ if (ret < 0)
+ goto channels_error;
+
+ /* Setup media links between VI and external sensor subdev. */
+ ret = tegra_vi_graph_init(vi);
+ if (ret < 0)
+ goto graph_error;
+
+ platform_set_drvdata(pdev, vi);
+
+ return 0;
+
+graph_error:
+ tegra_vi_channels_cleanup(vi);
+channels_error:
+ tegra_vi_v4l2_cleanup(vi);
+ return ret;
+}
+
+static int tegra_vi_remove(struct platform_device *pdev)
+{
+ struct tegra_vi *vi = platform_get_drvdata(pdev);
+
+ tegra_vi_graph_cleanup(vi);
+ tegra_vi_channels_cleanup(vi);
+ tegra_vi_v4l2_cleanup(vi);
+
+ return 0;
+}
+
+static const struct of_device_id tegra_vi_of_id_table[] = {
+ { .compatible = "nvidia,tegra210-vi" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, tegra_vi_of_id_table);
+
+static struct platform_driver tegra_vi_driver = {
+ .driver = {
+ .name = "tegra-vi",
+ .of_match_table = tegra_vi_of_id_table,
+ },
+ .probe = tegra_vi_probe,
+ .remove = tegra_vi_remove,
+};
+module_platform_driver(tegra_vi_driver);
+
+MODULE_AUTHOR("Bryan Wu <pe...@nvidia.com>");
+MODULE_DESCRIPTION("NVIDIA Tegra Video Input Device Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/media/platform/tegra/tegra-vi.h
b/drivers/media/platform/tegra/tegra-vi.h
new file mode 100644
index 0000000..42d151e
--- /dev/null
+++ b/drivers/media/platform/tegra/tegra-vi.h
@@ -0,0 +1,213 @@
+/*
+ * NVIDIA Tegra Video Input Device
+ *
+ * Copyright (c) 2015, NVIDIA CORPORATION. All rights reserved.
+ *
+ * Author: Bryan Wu <pe...@nvidia.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __TEGRA_VI_H__
+#define __TEGRA_VI_H__
+
+#include <linux/host1x.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/spinlock.h>
+#include <linux/videodev2.h>
+
+#include <media/media-device.h>
+#include <media/media-entity.h>
+#include <media/v4l2-async.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-dev.h>
+#include <media/videobuf2-v4l2.h>
+
+#include "tegra-core.h"
+
+#define MAX_CHAN_NUM 6
+#define MAX_FORMAT_NUM 64
+
+/**
+ * struct tegra_channel_buffer - video channel buffer
+ * @buf: vb2 buffer base object
+ * @queue: buffer list entry in the channel queued buffers list
+ * @chan: channel that uses the buffer
+ * @addr: Tegra IOVA buffer address for VI output
+ */
+struct tegra_channel_buffer {
+ struct vb2_v4l2_buffer buf;
+ struct list_head queue;
+ struct tegra_channel *chan;
+
+ dma_addr_t addr;
+};
+
+#define to_tegra_channel_buffer(vb) \
+ container_of(vb, struct tegra_channel_buffer, buf)
+
+/**
+ * struct tegra_vi_graph_entity - Entity in the video graph
+ * @list: list entry in a graph entities list
+ * @node: the entity's DT node
+ * @entity: media entity, from the corresponding V4L2 subdev
+ * @asd: subdev asynchronous registration information
+ * @subdev: V4L2 subdev
+ */
+struct tegra_vi_graph_entity {
+ struct list_head list;
+ struct device_node *node;
+ struct media_entity *entity;
+
+ struct v4l2_async_subdev asd;
+ struct v4l2_subdev *subdev;
+};
+
+/**
+ * struct tegra_channel - Tegra video channel
+ * @list: list entry in a composite device dmas list
+ * @video: V4L2 video device associated with the video channel
+ * @video_lock:
+ * @pad: media pad for the video device entity
+ * @pipe: pipeline belonging to the channel
+ *
+ * @vi: composite device DT node port number for the channel
+ *
+ * @client: host1x client struct
+ * @sp: host1x syncpoint pointer
+ *
+ * @kthread_capture: kernel thread task structure of this video channel
+ * @wait: wait queue structure for kernel thread
+ *
+ * @format: active V4L2 pixel format
+ * @fmtinfo: format information corresponding to the active @format
+ *
+ * @queue: vb2 buffers queue
+ * @alloc_ctx: allocation context for the vb2 @queue
+ * @sequence: V4L2 buffers sequence number
+ *
+ * @capture: list of queued buffers for capture
+ * @queued_lock: protects the buf_queued list
+ *
+ * @csi: CSI register bases
+ * @align: channel buffer alignment, default is 64
+ * @port: CSI port of this video channel
+ * @io_id: Tegra IO rail ID of this video channel
+ *
+ * @fmts_bitmap: a bitmap for formats supported
+ */
+struct tegra_channel {
+ struct list_head list;
+ struct video_device video;
+ struct mutex video_lock;
+ struct media_pad pad;
+ struct media_pipeline pipe;
+
+ struct tegra_vi *vi;
+
+ struct host1x_client client;
+ struct host1x_syncpt *sp;
+
+ struct task_struct *kthread_capture_start;
+ wait_queue_head_t start_wait;
+ struct task_struct *kthread_capture_done;
+ wait_queue_head_t done_wait;
+
+ struct v4l2_pix_format format;
+ const struct tegra_video_format *fmtinfo;
+
+ struct vb2_queue queue;
+ void *alloc_ctx;
+ u32 sequence;
+
+ struct list_head capture;
+ spinlock_t start_lock;
+ struct list_head done;
+ spinlock_t done_lock;
+
+ void __iomem *csi;
+ unsigned int align;
+ unsigned int port;
+ unsigned int io_id;
+
+ DECLARE_BITMAP(fmts_bitmap, MAX_FORMAT_NUM);
+};
+
+#define to_tegra_channel(vdev) \
+ container_of(vdev, struct tegra_channel, video)
+
+enum tegra_vi_pg_mode {
+ TEGRA_VI_PG_DISABLED = 0,
+ TEGRA_VI_PG_DIRECT,
+ TEGRA_VI_PG_PATCH,
+};
+
+/**
+ * struct tegra_vi - NVIDIA Tegra Video Input device structure
+ * @v4l2_dev: V4L2 device
+ * @media_dev: media device
+ * @dev: device struct
+ *
+ * @iomem: register base
+ * @vi_clk: main clock for VI block
+ * @parent_clk: parent clock of VI clock
+ * @csi_clk: clock for CSI
+ * @vi_rst: reset controller
+ * @vi_reg: regulator for VI hardware, normally it avdd_dsi_csi
+ *
+ * @power_on_refcnt: reference count for power on/off operations
+ *
+ * @notifier: V4L2 asynchronous subdevs notifier
+ * @entities: entities in the graph as a list of tegra_vi_graph_entity
+ * @num_subdevs: number of subdevs in the pipeline
+ *
+ * @channels: list of channels at the pipeline output and input
+ *
+ * @ctrl_handler: V4L2 control handler
+ * @pattern: test pattern generator V4L2 control
+ * @pg_mode: test pattern generator mode (disabled/direct/patch)
+ * @tpg_fmts_bitmap: a bitmap for formats in test pattern generator mode
+ *
+ * @has_sensors: a flag to indicate whether is a real sensor connecting
+ */
+struct tegra_vi {
+ struct v4l2_device v4l2_dev;
+ struct media_device media_dev;
+ struct device *dev;
+
+ void __iomem *iomem;
+ struct clk *vi_clk;
+ struct clk *parent_clk;
+ struct clk *csi_clk;
+ struct reset_control *vi_rst;
+ struct regulator *vi_reg;
+
+ atomic_t power_on_refcnt;
+
+ struct v4l2_async_notifier notifier;
+ struct list_head entities;
+ unsigned int num_subdevs;
+
+ struct tegra_channel chans[MAX_CHAN_NUM];
+
+ struct v4l2_ctrl_handler ctrl_handler;
+ struct v4l2_ctrl *pattern;
+ enum tegra_vi_pg_mode pg_mode;
+ DECLARE_BITMAP(tpg_fmts_bitmap, MAX_FORMAT_NUM);
+
+ bool has_sensors;
+};
+
+int tegra_vi_power_on(struct tegra_vi *vi);
+void tegra_vi_power_off(struct tegra_vi *vi);
+
+int tegra_channel_init(struct tegra_vi *vi, unsigned int port);
+int tegra_channel_cleanup(struct tegra_channel *chan);
+void tegra_channel_fmts_bitmap_init(struct tegra_channel *chan,
+ struct tegra_vi_graph_entity *entity);
+
+#endif /* __TEGRA_VI_H__ */
--
2.1.4
--
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