@@ -109,6 +109,18 @@ config VIDEO_OMAP3_DEBUG
---help---
Enable debug messages on OMAP 3 camera controller driver.
+config VIDEO_S3C_CAMIF
+ tristate "Samsung S3C244X/S3C64XX SoC Camera Interface driver"
+ depends on VIDEO_V4L2 && I2C && VIDEO_V4L2_SUBDEV_API
+ depends on (PLAT_S3C64XX || PLAT_S3C24XX)
+ select VIDEOBUF2_DMA_CONTIG
+ ---help---
+ This is a v4l2 driver for s3c244x and s3c64xx SoC series camera
+ host interface (CAMIF).
+
+ To compile this driver as a module, choose M here: the module
+ will be called s3c-camif.
+
source "drivers/media/platform/soc_camera/Kconfig"
source "drivers/media/platform/s5p-fimc/Kconfig"
source "drivers/media/platform/s5p-tv/Kconfig"
@@ -27,6 +27,7 @@ obj-$(CONFIG_VIDEO_CODA) += coda.o
obj-$(CONFIG_VIDEO_MEM2MEM_DEINTERLACE) += m2m-deinterlace.o
+obj-$(CONFIG_VIDEO_S3C_CAMIF) += s3c-camif/
obj-$(CONFIG_VIDEO_SAMSUNG_S5P_FIMC) += s5p-fimc/
obj-$(CONFIG_VIDEO_SAMSUNG_S5P_JPEG) += s5p-jpeg/
obj-$(CONFIG_VIDEO_SAMSUNG_S5P_MFC) += s5p-mfc/
new file mode 100644
@@ -0,0 +1,5 @@
+# Makefile for s3c244x/s3c64xx CAMIF driver
+
+s3c-camif-objs := camif-core.o camif-capture.o camif-regs.o
+
+obj-$(CONFIG_VIDEO_S3C_CAMIF) += s3c-camif.o
new file mode 100644
@@ -0,0 +1,1638 @@
+/*
+ * s3c244x/s3c64xx SoC series Camera Interface (CAMIF) driver
+ *
+ * Copyright (C) 2012 Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
+ * Copyright (C) 2012 Tomasz Figa <tomasz.figa@gmail.com>
+ *
+ * Based on drivers/media/platform/s5p-fimc,
+ * Copyright (C) 2010 - 2012 Samsung Electronics Co., Ltd.
+ *
+ * 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.
+*/
+#define pr_fmt(fmt) "%s:%d " fmt, __func__, __LINE__
+
+#include <linux/bug.h>
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/ratelimit.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/videodev2.h>
+
+#include <media/media-device.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-event.h>
+#include <media/v4l2-ioctl.h>
+#include <media/videobuf2-core.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include "camif-core.h"
+#include "camif-regs.h"
+
+static int debug;
+module_param(debug, int, 0644);
+
+/* Locking: called with vp->camif->slock held */
+static void camif_cfg_video_path(struct camif_vp *vp)
+{
+ WARN_ON(s3c_camif_get_scaler_config(vp, &vp->scaler));
+ camif_hw_set_scaler(vp);
+ camif_hw_set_flip(vp);
+ camif_hw_set_target_format(vp);
+ /* camif_hw_set_rotation(vp); */
+ camif_hw_set_output_dma(vp);
+}
+
+static void camif_prepare_dma_offset(struct camif_vp *vp)
+{
+ struct camif_frame *f = &vp->out_frame;
+
+ f->dma_offset.initial = f->rect.top * f->f_width + f->rect.left;
+ f->dma_offset.line = f->f_width - (f->rect.left + f->rect.width);
+
+ pr_debug("dma_offset: initial=%d, line=%d\n",
+ f->dma_offset.initial, f->dma_offset.line);
+}
+
+static int s3c_camif_hw_init(struct camif_dev *camif, struct camif_vp *vp)
+{
+ unsigned int ip_rev = camif->variant->ip_revision;
+ unsigned long flags;
+
+ if (camif->sensor.sd == NULL || vp->out_fmt == NULL)
+ return -EINVAL;
+
+ spin_lock_irqsave(&camif->slock, flags);
+
+ if (ip_rev == S3C244X_CAMIF_IP_REV)
+ camif_hw_clear_fifo_overflow(vp);
+ camif_hw_set_camera_bus(camif);
+ camif_hw_set_source_format(camif);
+ camif_hw_set_camera_crop(camif);
+ camif_hw_set_test_pattern(camif, camif->test_pattern->val);
+ if (ip_rev == S3C6410_CAMIF_IP_REV)
+ camif_hw_set_input_path(vp);
+ camif_cfg_video_path(vp);
+ vp->state &= ~ST_VP_CONFIG;
+
+ spin_unlock_irqrestore(&camif->slock, flags);
+ return 0;
+}
+
+/*
+ * Initialize the video path, only up from the scaler stage. The camera
+ * input interface set up is skipped. This is useful to enable one of the
+ * video paths when the other is already running.
+ */
+static int s3c_camif_hw_vp_init(struct camif_dev *camif, struct camif_vp *vp)
+{
+ unsigned int ip_rev = camif->variant->ip_revision;
+ unsigned long flags;
+
+ if (vp->out_fmt == NULL)
+ return -EINVAL;
+
+ spin_lock_irqsave(&camif->slock, flags);
+ camif_prepare_dma_offset(vp);
+ if (ip_rev == S3C244X_CAMIF_IP_REV)
+ camif_hw_clear_fifo_overflow(vp);
+ camif_cfg_video_path(vp);
+ if (ip_rev == S3C6410_CAMIF_IP_REV)
+ camif_hw_set_effect(vp, false);
+ vp->state &= ~ST_VP_CONFIG;
+
+ spin_unlock_irqrestore(&camif->slock, flags);
+ return 0;
+}
+
+static int sensor_set_power(struct camif_dev *camif, int on)
+{
+ struct cam_sensor *sensor = &camif->sensor;
+ int err = 0;
+
+ if (!on == camif->sensor.power_count)
+ err = v4l2_subdev_call(sensor->sd, core, s_power, on);
+ if (!err)
+ sensor->power_count += on ? 1 : -1;
+
+ pr_debug("on: %d, power_count: %d, err: %d\n",
+ on, sensor->power_count, err);
+
+ return err;
+}
+
+static int sensor_set_streaming(struct camif_dev *camif, int on)
+{
+ struct cam_sensor *sensor = &camif->sensor;
+ int err = 0;
+
+ if (!on == camif->sensor.stream_count)
+ err = v4l2_subdev_call(sensor->sd, video, s_stream, on);
+ if (!err)
+ sensor->stream_count += on ? 1 : -1;
+
+ pr_debug("on: %d, stream_count: %d, err: %d\n",
+ on, sensor->stream_count, err);
+
+ return err;
+}
+
+/*
+ * Reinitialize the driver so it is ready to start streaming again.
+ * Return any buffers to vb2, perform CAMIF software reset and
+ * turn off streaming at the data pipeline (sensor) if required.
+ */
+static int camif_reinitialize(struct camif_vp *vp)
+{
+ struct camif_dev *camif = vp->camif;
+ struct camif_buffer *buf;
+ unsigned long flags;
+ bool streaming;
+
+ spin_lock_irqsave(&camif->slock, flags);
+ streaming = vp->state & ST_VP_SENSOR_STREAMING;
+
+ vp->state &= ~(ST_VP_PENDING | ST_VP_RUNNING | ST_VP_OFF |
+ ST_VP_ABORTING | ST_VP_STREAMING |
+ ST_VP_SENSOR_STREAMING | ST_VP_LASTIRQ);
+
+ /* Release unused buffers */
+ while (!list_empty(&vp->pending_buf_q)) {
+ buf = camif_pending_queue_pop(vp);
+ vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
+ }
+
+ while (!list_empty(&vp->active_buf_q)) {
+ buf = camif_active_queue_pop(vp);
+ vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
+ }
+
+ spin_unlock_irqrestore(&camif->slock, flags);
+
+ if (!streaming)
+ return 0;
+
+ return sensor_set_streaming(camif, 0);
+}
+
+static bool s3c_vp_active(struct camif_vp *vp)
+{
+ struct camif_dev *camif = vp->camif;
+ unsigned long flags;
+ bool ret;
+
+ spin_lock_irqsave(&camif->slock, flags);
+ ret = (vp->state & ST_VP_RUNNING) || (vp->state & ST_VP_PENDING);
+ spin_unlock_irqrestore(&camif->slock, flags);
+
+ return ret;
+}
+
+static bool camif_is_streaming(struct camif_dev *camif)
+{
+ unsigned long flags;
+ bool status;
+
+ spin_lock_irqsave(&camif->slock, flags);
+ status = camif->stream_count > 0;
+ spin_unlock_irqrestore(&camif->slock, flags);
+
+ return status;
+}
+
+static int camif_stop_capture(struct camif_vp *vp)
+{
+ struct camif_dev *camif = vp->camif;
+ unsigned long flags;
+ int ret;
+
+ if (!s3c_vp_active(vp))
+ return 0;
+
+ spin_lock_irqsave(&camif->slock, flags);
+ vp->state &= ~(ST_VP_OFF | ST_VP_LASTIRQ);
+ vp->state |= ST_VP_ABORTING;
+ spin_unlock_irqrestore(&camif->slock, flags);
+
+ ret = wait_event_timeout(vp->irq_queue,
+ !(vp->state & ST_VP_ABORTING),
+ msecs_to_jiffies(CAMIF_STOP_TIMEOUT));
+
+ spin_lock_irqsave(&camif->slock, flags);
+
+ if (ret == 0 && !(vp->state & ST_VP_OFF)) {
+ /* Timed out, forcibly stop capture */
+ vp->state &= ~(ST_VP_OFF | ST_VP_ABORTING |
+ ST_VP_LASTIRQ);
+
+ camif_hw_disable_capture(vp);
+ camif_hw_enable_scaler(vp, false);
+ }
+
+ spin_unlock_irqrestore(&camif->slock, flags);
+
+ return camif_reinitialize(vp);
+}
+
+static int camif_prepare_addr(struct camif_vp *vp, struct vb2_buffer *vb,
+ struct camif_addr *paddr)
+{
+ struct camif_frame *frame = &vp->out_frame;
+ u32 pix_size;
+
+ if (vb == NULL || frame == NULL)
+ return -EINVAL;
+
+ pix_size = frame->rect.width * frame->rect.height;
+
+ pr_debug("colplanes: %d, pix_size: %u\n",
+ vp->out_fmt->colplanes, pix_size);
+
+ paddr->y = vb2_dma_contig_plane_dma_addr(vb, 0);
+
+ switch (vp->out_fmt->colplanes) {
+ case 1:
+ paddr->cb = 0;
+ paddr->cr = 0;
+ break;
+ case 2:
+ /* decompose Y into Y/Cb */
+ paddr->cb = (u32)(paddr->y + pix_size);
+ paddr->cr = 0;
+ break;
+ case 3:
+ paddr->cb = (u32)(paddr->y + pix_size);
+ /* decompose Y into Y/Cb/Cr */
+ if (vp->out_fmt->color == IMG_FMT_YCBCR422P)
+ paddr->cr = (u32)(paddr->cb + (pix_size >> 1));
+ else /* 420 */
+ paddr->cr = (u32)(paddr->cb + (pix_size >> 2));
+
+ if (vp->out_fmt->color == IMG_FMT_YCRCB420)
+ swap(paddr->cb, paddr->cr);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ pr_debug("DMA address: y: %#x cb: %#x cr: %#x\n",
+ paddr->y, paddr->cb, paddr->cr);
+
+ return 0;
+}
+
+irqreturn_t s3c_camif_irq_handler(int irq, void *priv)
+{
+ struct camif_vp *vp = priv;
+ struct camif_dev *camif = vp->camif;
+ unsigned int ip_rev = camif->variant->ip_revision;
+ unsigned int status;
+
+ spin_lock(&camif->slock);
+
+ if (ip_rev == S3C6410_CAMIF_IP_REV)
+ camif_hw_clear_pending_irq(vp);
+
+ status = camif_hw_get_status(vp);
+
+ if (ip_rev == S3C244X_CAMIF_IP_REV && (status & CISTATUS_OVF_MASK)) {
+ camif_hw_clear_fifo_overflow(vp);
+ goto unlock;
+ }
+
+ if (vp->state & ST_VP_ABORTING) {
+ if (vp->state & ST_VP_OFF) {
+ /* Last IRQ */
+ vp->state &= ~(ST_VP_OFF | ST_VP_ABORTING |
+ ST_VP_LASTIRQ);
+ wake_up(&vp->irq_queue);
+ goto unlock;
+ } else if (vp->state & ST_VP_LASTIRQ) {
+ camif_hw_disable_capture(vp);
+ camif_hw_enable_scaler(vp, false);
+ camif_hw_set_lastirq(vp, false);
+ vp->state |= ST_VP_OFF;
+ } else {
+ /* Disable capture, enable last IRQ */
+ camif_hw_set_lastirq(vp, true);
+ vp->state |= ST_VP_LASTIRQ;
+ }
+ }
+
+ if (!list_empty(&vp->pending_buf_q) && (vp->state & ST_VP_RUNNING) &&
+ !list_empty(&vp->active_buf_q)) {
+ unsigned int index;
+ struct camif_buffer *vbuf;
+ struct timeval *tv;
+ struct timespec ts;
+ /*
+ * Get previous DMA write buffer index:
+ * 0 => DMA buffer 0, 2;
+ * 1 => DMA buffer 1, 3.
+ */
+ index = (CISTATUS_FRAMECNT(status) + 2) & 1;
+
+ ktime_get_ts(&ts);
+ vbuf = camif_active_queue_peek(vp, index);
+
+ if (!WARN_ON(vbuf == NULL)) {
+ /* Dequeue a filled buffer */
+ tv = &vbuf->vb.v4l2_buf.timestamp;
+ tv->tv_sec = ts.tv_sec;
+ tv->tv_usec = ts.tv_nsec / NSEC_PER_USEC;
+ vbuf->vb.v4l2_buf.sequence = vp->frame_sequence++;
+ vb2_buffer_done(&vbuf->vb, VB2_BUF_STATE_DONE);
+
+ /* Set up an empty buffer at the DMA engine */
+ vbuf = camif_pending_queue_pop(vp);
+ vbuf->index = index;
+ camif_hw_set_output_addr(vp, &vbuf->paddr, index);
+ camif_hw_set_output_addr(vp, &vbuf->paddr, index + 2);
+
+ /* Scheduled in H/W, add to the queue */
+ camif_active_queue_add(vp, vbuf);
+ }
+ } else if (!(vp->state & ST_VP_ABORTING) &&
+ (vp->state & ST_VP_PENDING)) {
+ vp->state |= ST_VP_RUNNING;
+ }
+
+ if (vp->state & ST_VP_CONFIG) {
+ camif_prepare_dma_offset(vp);
+ camif_hw_set_camera_crop(camif);
+ camif_hw_set_scaler(vp);
+ camif_hw_set_flip(vp);
+ camif_hw_set_test_pattern(camif, camif->test_pattern->val);
+ vp->state &= ~ST_VP_CONFIG;
+ }
+unlock:
+ spin_unlock(&camif->slock);
+ return IRQ_HANDLED;
+}
+
+static int start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+ struct camif_vp *vp = vb2_get_drv_priv(vq);
+ struct camif_dev *camif = vp->camif;
+ unsigned long flags;
+ int ret;
+
+ /*
+ * We assume the codec capture path is always activated
+ * first, before the preview path starts streaming.
+ * This is required to avoid internal FIFO overflow and
+ * a need for CAMIF software reset.
+ */
+ spin_lock_irqsave(&camif->slock, flags);
+
+ if (camif->stream_count == 0) {
+ camif_hw_reset(camif);
+ spin_unlock_irqrestore(&camif->slock, flags);
+ ret = s3c_camif_hw_init(camif, vp);
+ } else {
+ spin_unlock_irqrestore(&camif->slock, flags);
+ ret = s3c_camif_hw_vp_init(camif, vp);
+ }
+
+ if (ret < 0) {
+ camif_reinitialize(vp);
+ return ret;
+ }
+
+ spin_lock_irqsave(&camif->slock, flags);
+ vp->frame_sequence = 0;
+ vp->state |= ST_VP_PENDING;
+
+ if (!list_empty(&vp->pending_buf_q) &&
+ (!(vp->state & ST_VP_STREAMING) ||
+ !(vp->state & ST_VP_SENSOR_STREAMING))) {
+
+ camif_hw_enable_scaler(vp, vp->scaler.enable);
+ camif_hw_enable_capture(vp);
+ vp->state |= ST_VP_STREAMING;
+
+ if (!(vp->state & ST_VP_SENSOR_STREAMING)) {
+ vp->state |= ST_VP_SENSOR_STREAMING;
+ spin_unlock_irqrestore(&camif->slock, flags);
+ ret = sensor_set_streaming(camif, 1);
+ if (ret)
+ v4l2_err(&vp->vdev, "Sensor s_stream failed\n");
+ if (debug)
+ camif_hw_dump_regs(camif, __func__);
+
+ return ret;
+ }
+ }
+ spin_unlock_irqrestore(&camif->slock, flags);
+
+ return 0;
+}
+
+static int stop_streaming(struct vb2_queue *vq)
+{
+ struct camif_vp *vp = vb2_get_drv_priv(vq);
+ return camif_stop_capture(vp);
+}
+
+static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *pfmt,
+ unsigned int *num_buffers, unsigned int *num_planes,
+ unsigned int sizes[], void *allocators[])
+{
+ const struct v4l2_pix_format *pix = NULL;
+ struct camif_vp *vp = vb2_get_drv_priv(vq);
+ struct camif_dev *camif = vp->camif;
+ struct camif_frame *frame = &vp->out_frame;
+ const struct camif_fmt *fmt = vp->out_fmt;
+ unsigned int size;
+
+ if (pfmt) {
+ pix = &pfmt->fmt.pix;
+ fmt = s3c_camif_find_format(vp, &pix->pixelformat, -1);
+ size = (pix->width * pix->height * fmt->depth) / 8;
+ } else {
+ size = (frame->f_width * frame->f_height * fmt->depth) / 8;
+ }
+
+ if (fmt == NULL)
+ return -EINVAL;
+ *num_planes = 1;
+
+ if (pix)
+ sizes[0] = max(size, pix->sizeimage);
+ else
+ sizes[0] = size;
+ allocators[0] = camif->alloc_ctx;
+
+ pr_debug("size: %u\n", sizes[0]);
+ return 0;
+}
+
+static int buffer_prepare(struct vb2_buffer *vb)
+{
+ struct camif_vp *vp = vb2_get_drv_priv(vb->vb2_queue);
+
+ if (vp->out_fmt == NULL)
+ return -EINVAL;
+
+ if (vb2_plane_size(vb, 0) < vp->payload) {
+ v4l2_err(&vp->vdev, "buffer too small: %lu, required: %u\n",
+ vb2_plane_size(vb, 0), vp->payload);
+ return -EINVAL;
+ }
+ vb2_set_plane_payload(vb, 0, vp->payload);
+
+ return 0;
+}
+
+static void buffer_queue(struct vb2_buffer *vb)
+{
+ struct camif_buffer *buf = container_of(vb, struct camif_buffer, vb);
+ struct camif_vp *vp = vb2_get_drv_priv(vb->vb2_queue);
+ struct camif_dev *camif = vp->camif;
+ unsigned long flags;
+
+ spin_lock_irqsave(&camif->slock, flags);
+ WARN_ON(camif_prepare_addr(vp, &buf->vb, &buf->paddr));
+
+ if (!(vp->state & ST_VP_STREAMING) && vp->active_buffers < 2) {
+ /* Schedule an empty buffer in H/W */
+ buf->index = vp->buf_index;
+
+ camif_hw_set_output_addr(vp, &buf->paddr, buf->index);
+ camif_hw_set_output_addr(vp, &buf->paddr, buf->index + 2);
+
+ camif_active_queue_add(vp, buf);
+ vp->buf_index = !vp->buf_index;
+ } else {
+ camif_pending_queue_add(vp, buf);
+ }
+
+ if (vb2_is_streaming(&vp->vb_queue) && !list_empty(&vp->pending_buf_q)
+ && !(vp->state & ST_VP_STREAMING)) {
+
+ vp->state |= ST_VP_STREAMING;
+ camif_hw_enable_scaler(vp, vp->scaler.enable);
+ camif_hw_enable_capture(vp);
+ spin_unlock_irqrestore(&camif->slock, flags);
+
+ if (!(vp->state & ST_VP_SENSOR_STREAMING)) {
+ if (sensor_set_streaming(camif, 1) == 0)
+ vp->state |= ST_VP_SENSOR_STREAMING;
+ else
+ v4l2_err(&vp->vdev, "Sensor s_stream failed\n");
+
+ if (debug)
+ camif_hw_dump_regs(camif, __func__);
+ }
+ return;
+ }
+ spin_unlock_irqrestore(&camif->slock, flags);
+}
+
+static void camif_lock(struct vb2_queue *vq)
+{
+ struct camif_vp *vp = vb2_get_drv_priv(vq);
+ mutex_lock(&vp->camif->lock);
+}
+
+static void camif_unlock(struct vb2_queue *vq)
+{
+ struct camif_vp *vp = vb2_get_drv_priv(vq);
+ mutex_unlock(&vp->camif->lock);
+}
+
+static const struct vb2_ops s3c_camif_qops = {
+ .queue_setup = queue_setup,
+ .buf_prepare = buffer_prepare,
+ .buf_queue = buffer_queue,
+ .wait_prepare = camif_unlock,
+ .wait_finish = camif_lock,
+ .start_streaming = start_streaming,
+ .stop_streaming = stop_streaming,
+};
+
+static int s3c_camif_open(struct file *file)
+{
+ struct camif_vp *vp = video_drvdata(file);
+ struct camif_dev *camif = vp->camif;
+ int ret;
+
+ pr_debug("[vp%d] state: %#x, owner: %p, pid: %d\n", vp->id,
+ vp->state, vp->owner, task_pid_nr(current));
+
+ if (mutex_lock_interruptible(&camif->lock))
+ return -ERESTARTSYS;
+
+ ret = v4l2_fh_open(file);
+ if (ret < 0)
+ goto unlock;
+
+ ret = pm_runtime_get_sync(camif->dev);
+ if (ret < 0)
+ goto err_pm;
+
+ ret = sensor_set_power(camif, 1);
+ if (!ret)
+ goto unlock;
+
+ pm_runtime_put(camif->dev);
+err_pm:
+ v4l2_fh_release(file);
+unlock:
+ mutex_unlock(&camif->lock);
+ return ret;
+}
+
+static int s3c_camif_close(struct file *file)
+{
+ struct camif_vp *vp = video_drvdata(file);
+ struct camif_dev *camif = vp->camif;
+ int ret;
+
+ pr_debug("[vp%d] state: %#x, owner: %p, pid: %d\n", vp->id,
+ vp->state, vp->owner, task_pid_nr(current));
+
+ if (mutex_lock_interruptible(&camif->lock))
+ return -ERESTARTSYS;
+
+ if (vp->owner == file->private_data) {
+ camif_stop_capture(vp);
+ vb2_queue_release(&vp->vb_queue);
+ vp->owner = NULL;
+ }
+
+ sensor_set_power(camif, 0);
+
+ pm_runtime_put(camif->dev);
+ ret = v4l2_fh_release(file);
+
+ mutex_unlock(&camif->lock);
+ return ret;
+}
+
+static unsigned int s3c_camif_poll(struct file *file,
+ struct poll_table_struct *wait)
+{
+ struct camif_vp *vp = video_drvdata(file);
+ struct camif_dev *camif = vp->camif;
+ int ret;
+
+ if (mutex_lock_interruptible(&camif->lock))
+ return -ERESTARTSYS;
+
+ if (vp->owner && vp->owner != file->private_data)
+ ret = -EBUSY;
+ else
+ ret = vb2_poll(&vp->vb_queue, file, wait);
+
+ mutex_unlock(&camif->lock);
+ return ret;
+}
+
+static int s3c_camif_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ struct camif_vp *vp = video_drvdata(file);
+ struct camif_dev *camif = vp->camif;
+ int ret;
+
+ if (mutex_lock_interruptible(&camif->lock))
+ return -ERESTARTSYS;
+
+ if (vp->owner && vp->owner != file->private_data)
+ ret = -EBUSY;
+ else
+ ret = vb2_mmap(&vp->vb_queue, vma);
+
+ mutex_unlock(&camif->lock);
+ return ret;
+}
+
+static const struct v4l2_file_operations s3c_camif_fops = {
+ .owner = THIS_MODULE,
+ .open = s3c_camif_open,
+ .release = s3c_camif_close,
+ .poll = s3c_camif_poll,
+ .unlocked_ioctl = video_ioctl2,
+ .mmap = s3c_camif_mmap,
+};
+
+/*
+ * Video node IOCTLs
+ */
+
+static int s3c_camif_vidioc_querycap(struct file *file, void *priv,
+ struct v4l2_capability *cap)
+{
+ strlcpy(cap->driver, S3C_CAMIF_DRIVER_NAME, sizeof(cap->driver));
+ strlcpy(cap->card, S3C_CAMIF_DRIVER_NAME, sizeof(cap->card));
+ strlcpy(cap->bus_info, "platform", sizeof(cap->bus_info));
+
+ cap->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_CAPTURE;
+ cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
+
+ return 0;
+}
+
+static int s3c_camif_vidioc_enum_input(struct file *file, void *priv,
+ struct v4l2_input *input)
+{
+ struct camif_vp *vp = video_drvdata(file);
+ struct v4l2_subdev *sensor = vp->camif->sensor.sd;
+
+ if (input->index || sensor == NULL)
+ return -EINVAL;
+
+ input->type = V4L2_INPUT_TYPE_CAMERA;
+ strlcpy(input->name, sensor->name, sizeof(input->name));
+ return 0;
+}
+
+static int s3c_camif_vidioc_s_input(struct file *file, void *priv,
+ unsigned int i)
+{
+ return i == 0 ? 0 : -EINVAL;
+}
+
+static int s3c_camif_vidioc_g_input(struct file *file, void *priv,
+ unsigned int *i)
+{
+ *i = 0;
+ return 0;
+}
+
+static int s3c_camif_vidioc_enum_fmt(struct file *file, void *priv,
+ struct v4l2_fmtdesc *f)
+{
+ struct camif_vp *vp = video_drvdata(file);
+ const struct camif_fmt *fmt;
+
+ fmt = s3c_camif_find_format(vp, NULL, f->index);
+ if (!fmt)
+ return -EINVAL;
+
+ strlcpy(f->description, fmt->name, sizeof(f->description));
+ f->pixelformat = fmt->fourcc;
+
+ pr_debug("fmt(%d): %s\n", f->index, f->description);
+ return 0;
+}
+
+static int s3c_camif_vidioc_g_fmt(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct camif_vp *vp = video_drvdata(file);
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ struct camif_frame *frame = &vp->out_frame;
+ const struct camif_fmt *fmt = vp->out_fmt;
+
+ pix->bytesperline = frame->f_width * fmt->ybpp;
+ pix->sizeimage = vp->payload;
+
+ pix->pixelformat = fmt->fourcc;
+ pix->width = frame->f_width;
+ pix->height = frame->f_height;
+ pix->field = V4L2_FIELD_NONE;
+ pix->colorspace = V4L2_COLORSPACE_JPEG;
+
+ return 0;
+}
+
+static int __camif_video_try_format(struct camif_vp *vp,
+ struct v4l2_pix_format *pix,
+ const struct camif_fmt **ffmt)
+{
+ struct camif_dev *camif = vp->camif;
+ struct v4l2_rect *crop = &camif->camif_crop;
+ unsigned int wmin, hmin, sc_hrmax, sc_vrmax;
+ const struct vp_pix_limits *pix_lim;
+ const struct camif_fmt *fmt;
+
+ fmt = s3c_camif_find_format(vp, &pix->pixelformat, 0);
+
+ if (WARN_ON(fmt == NULL))
+ return -EINVAL;
+
+ if (ffmt)
+ *ffmt = fmt;
+
+ pix_lim = &camif->variant->vp_pix_limits[vp->id];
+
+ pr_debug("fmt: %ux%u, crop: %ux%u, bytesperline: %u\n",
+ pix->width, pix->height, crop->width, crop->height,
+ pix->bytesperline);
+ /*
+ * Calculate minimum width and height according to the configured
+ * camera input interface crop rectangle and the resizer's capabilities.
+ */
+ sc_hrmax = min(SCALER_MAX_RATIO, 1 << (ffs(crop->width) - 3));
+ sc_vrmax = min(SCALER_MAX_RATIO, 1 << (ffs(crop->height) - 1));
+
+ wmin = max_t(u32, pix_lim->min_out_width, crop->width / sc_hrmax);
+ wmin = round_up(wmin, pix_lim->out_width_align);
+ hmin = max_t(u32, 8, crop->height / sc_vrmax);
+ hmin = round_up(hmin, 8);
+
+ v4l_bound_align_image(&pix->width, wmin, pix_lim->max_sc_out_width,
+ ffs(pix_lim->out_width_align) - 1,
+ &pix->height, hmin, pix_lim->max_height, 0, 0);
+
+ pix->bytesperline = pix->width * fmt->ybpp;
+ pix->sizeimage = (pix->width * pix->height * fmt->depth) / 8;
+ pix->pixelformat = fmt->fourcc;
+ pix->colorspace = V4L2_COLORSPACE_JPEG;
+ pix->field = V4L2_FIELD_NONE;
+
+ pr_debug("%ux%u, wmin: %d, hmin: %d, sc_hrmax: %d, sc_vrmax: %d\n",
+ pix->width, pix->height, wmin, hmin, sc_hrmax, sc_vrmax);
+
+ return 0;
+}
+
+static int s3c_camif_vidioc_try_fmt(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct camif_vp *vp = video_drvdata(file);
+ return __camif_video_try_format(vp, &f->fmt.pix, NULL);
+}
+
+static int s3c_camif_vidioc_s_fmt(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ struct camif_vp *vp = video_drvdata(file);
+ struct camif_frame *out_frame = &vp->out_frame;
+ const struct camif_fmt *fmt = NULL;
+ int ret;
+
+ pr_debug("[vp%d]\n", vp->id);
+
+ if (vb2_is_busy(&vp->vb_queue))
+ return -EBUSY;
+
+ ret = __camif_video_try_format(vp, &f->fmt.pix, &fmt);
+ if (ret < 0)
+ return ret;
+
+ vp->out_fmt = fmt;
+ vp->payload = pix->sizeimage;
+ out_frame->f_width = pix->width;
+ out_frame->f_height = pix->height;
+
+ /* Reset composition rectangle */
+ out_frame->rect.width = pix->width;
+ out_frame->rect.height = pix->height;
+ out_frame->rect.left = 0;
+ out_frame->rect.top = 0;
+
+ if (vp->owner == NULL)
+ vp->owner = priv;
+
+ pr_debug("%ux%u. payload: %u. fmt: %s. %d %d. sizeimage: %d. bpl: %d\n",
+ out_frame->f_width, out_frame->f_height, vp->payload, fmt->name,
+ pix->width * pix->height * fmt->depth, fmt->depth,
+ pix->sizeimage, pix->bytesperline);
+
+ return 0;
+}
+
+/* Only check pixel formats at the sensor and the camif subdev pads */
+static int camif_pipeline_validate(struct camif_dev *camif)
+{
+ struct v4l2_subdev_format src_fmt;
+ struct media_pad *pad;
+ int ret;
+
+ /* Retrieve format at the sensor subdev source pad */
+ pad = media_entity_remote_source(&camif->pads[0]);
+ if (!pad || media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
+ return -EPIPE;
+
+ src_fmt.pad = pad->index;
+ src_fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
+ ret = v4l2_subdev_call(camif->sensor.sd, pad, get_fmt, NULL, &src_fmt);
+ if (ret < 0 && ret != -ENOIOCTLCMD)
+ return -EPIPE;
+
+ if (src_fmt.format.width != camif->mbus_fmt.width ||
+ src_fmt.format.height != camif->mbus_fmt.height ||
+ src_fmt.format.code != camif->mbus_fmt.code)
+ return -EPIPE;
+
+ return 0;
+}
+
+static int s3c_camif_streamon(struct file *file, void *priv,
+ enum v4l2_buf_type type)
+{
+ struct camif_vp *vp = video_drvdata(file);
+ struct camif_dev *camif = vp->camif;
+ struct media_entity *sensor = &camif->sensor.sd->entity;
+ int ret;
+
+ pr_debug("[vp%d]\n", vp->id);
+
+ if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ if (vp->owner && vp->owner != priv)
+ return -EBUSY;
+
+ if (s3c_vp_active(vp))
+ return 0;
+
+ ret = media_entity_pipeline_start(sensor, camif->m_pipeline);
+ if (ret < 0)
+ return ret;
+
+ ret = camif_pipeline_validate(camif);
+ if (ret < 0) {
+ media_entity_pipeline_stop(sensor);
+ return ret;
+ }
+
+ return vb2_streamon(&vp->vb_queue, type);
+}
+
+static int s3c_camif_streamoff(struct file *file, void *priv,
+ enum v4l2_buf_type type)
+{
+ struct camif_vp *vp = video_drvdata(file);
+ struct camif_dev *camif = vp->camif;
+ int ret;
+
+ pr_debug("[vp%d]\n", vp->id);
+
+ if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ if (vp->owner && vp->owner != priv)
+ return -EBUSY;
+
+ ret = vb2_streamoff(&vp->vb_queue, type);
+ if (ret == 0)
+ media_entity_pipeline_stop(&camif->sensor.sd->entity);
+ return ret;
+}
+
+static int s3c_camif_reqbufs(struct file *file, void *priv,
+ struct v4l2_requestbuffers *rb)
+{
+ struct camif_vp *vp = video_drvdata(file);
+ int ret;
+
+ pr_debug("[vp%d] rb count: %d, owner: %p, priv: %p\n",
+ vp->id, rb->count, vp->owner, priv);
+
+ if (vp->owner && vp->owner != priv)
+ return -EBUSY;
+
+ if (rb->count)
+ rb->count = max_t(u32, CAMIF_REQ_BUFS_MIN, rb->count);
+ else
+ vp->owner = NULL;
+
+ ret = vb2_reqbufs(&vp->vb_queue, rb);
+ if (!ret) {
+ vp->reqbufs_count = rb->count;
+ if (vp->owner == NULL && rb->count > 0)
+ vp->owner = priv;
+ }
+
+ return ret;
+}
+
+static int s3c_camif_querybuf(struct file *file, void *priv,
+ struct v4l2_buffer *buf)
+{
+ struct camif_vp *vp = video_drvdata(file);
+ return vb2_querybuf(&vp->vb_queue, buf);
+}
+
+static int s3c_camif_qbuf(struct file *file, void *priv,
+ struct v4l2_buffer *buf)
+{
+ struct camif_vp *vp = video_drvdata(file);
+
+ pr_debug("[vp%d]\n", vp->id);
+
+ if (vp->owner && vp->owner != priv)
+ return -EBUSY;
+
+ return vb2_qbuf(&vp->vb_queue, buf);
+}
+
+static int s3c_camif_dqbuf(struct file *file, void *priv,
+ struct v4l2_buffer *buf)
+{
+ struct camif_vp *vp = video_drvdata(file);
+
+ pr_debug("[vp%d] sequence: %d\n", vp->id, vp->frame_sequence);
+
+ if (vp->owner && vp->owner != priv)
+ return -EBUSY;
+
+ return vb2_dqbuf(&vp->vb_queue, buf, file->f_flags & O_NONBLOCK);
+}
+
+static int s3c_camif_create_bufs(struct file *file, void *priv,
+ struct v4l2_create_buffers *create)
+{
+ struct camif_vp *vp = video_drvdata(file);
+ int ret;
+
+ if (vp->owner && vp->owner != priv)
+ return -EBUSY;
+
+ create->count = max_t(u32, 1, create->count);
+ ret = vb2_create_bufs(&vp->vb_queue, create);
+
+ if (!ret && vp->owner == NULL)
+ vp->owner = priv;
+
+ return ret;
+}
+
+static int s3c_camif_prepare_buf(struct file *file, void *priv,
+ struct v4l2_buffer *b)
+{
+ struct camif_vp *vp = video_drvdata(file);
+ return vb2_prepare_buf(&vp->vb_queue, b);
+}
+
+static int s3c_camif_g_selection(struct file *file, void *priv,
+ struct v4l2_selection *sel)
+{
+ struct camif_vp *vp = video_drvdata(file);
+
+ if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+
+ switch (sel->target) {
+ case V4L2_SEL_TGT_COMPOSE_BOUNDS:
+ case V4L2_SEL_TGT_COMPOSE_DEFAULT:
+ sel->r.left = 0;
+ sel->r.top = 0;
+ sel->r.width = vp->out_frame.f_width;
+ sel->r.height = vp->out_frame.f_height;
+ return 0;
+
+ case V4L2_SEL_TGT_COMPOSE:
+ sel->r = vp->out_frame.rect;
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+static void __camif_try_compose(struct camif_dev *camif, struct camif_vp *vp,
+ struct v4l2_rect *r)
+{
+ /* s3c244x doesn't support composition */
+ if (camif->variant->ip_revision == S3C244X_CAMIF_IP_REV) {
+ *r = vp->out_frame.rect;
+ return;
+ }
+
+ /* TODO: s3c64xx */
+}
+
+static int s3c_camif_s_selection(struct file *file, void *priv,
+ struct v4l2_selection *sel)
+{
+ struct camif_vp *vp = video_drvdata(file);
+ struct camif_dev *camif = vp->camif;
+ struct v4l2_rect rect = sel->r;
+ unsigned long flags;
+
+ if (sel->type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
+ sel->target != V4L2_SEL_TGT_COMPOSE)
+ return -EINVAL;
+
+ __camif_try_compose(camif, vp, &rect);
+
+ sel->r = rect;
+ spin_lock_irqsave(&camif->slock, flags);
+ vp->out_frame.rect = rect;
+ vp->state |= ST_VP_CONFIG;
+ spin_unlock_irqrestore(&camif->slock, flags);
+
+ pr_debug("type: %#x, target: %#x, flags: %#x, (%d,%d)/%dx%d\n",
+ sel->type, sel->target, sel->flags,
+ sel->r.left, sel->r.top, sel->r.width, sel->r.height);
+
+ return 0;
+}
+
+static const struct v4l2_ioctl_ops s3c_camif_ioctl_ops = {
+ .vidioc_querycap = s3c_camif_vidioc_querycap,
+ .vidioc_enum_input = s3c_camif_vidioc_enum_input,
+ .vidioc_g_input = s3c_camif_vidioc_g_input,
+ .vidioc_s_input = s3c_camif_vidioc_s_input,
+ .vidioc_enum_fmt_vid_cap = s3c_camif_vidioc_enum_fmt,
+ .vidioc_try_fmt_vid_cap = s3c_camif_vidioc_try_fmt,
+ .vidioc_s_fmt_vid_cap = s3c_camif_vidioc_s_fmt,
+ .vidioc_g_fmt_vid_cap = s3c_camif_vidioc_g_fmt,
+ .vidioc_g_selection = s3c_camif_g_selection,
+ .vidioc_s_selection = s3c_camif_s_selection,
+ .vidioc_reqbufs = s3c_camif_reqbufs,
+ .vidioc_querybuf = s3c_camif_querybuf,
+ .vidioc_prepare_buf = s3c_camif_prepare_buf,
+ .vidioc_create_bufs = s3c_camif_create_bufs,
+ .vidioc_qbuf = s3c_camif_qbuf,
+ .vidioc_dqbuf = s3c_camif_dqbuf,
+ .vidioc_streamon = s3c_camif_streamon,
+ .vidioc_streamoff = s3c_camif_streamoff,
+ .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+ .vidioc_log_status = v4l2_ctrl_log_status,
+};
+
+/*
+ * Video node controls
+ */
+static int s3c_camif_video_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct camif_vp *vp = ctrl->priv;
+ struct camif_dev *camif = vp->camif;
+ unsigned long flags;
+
+ pr_debug("[vp%d] ctrl: %s, value: %d\n", vp->id,
+ ctrl->name, ctrl->val);
+
+ spin_lock_irqsave(&camif->slock, flags);
+
+ switch (ctrl->id) {
+ case V4L2_CID_HFLIP:
+ vp->hflip = ctrl->val;
+ break;
+
+ case V4L2_CID_VFLIP:
+ vp->vflip = ctrl->val;
+ break;
+ }
+
+ vp->state |= ST_VP_CONFIG;
+ spin_unlock_irqrestore(&camif->slock, flags);
+ return 0;
+}
+
+/* Codec and preview video node control ops */
+static const struct v4l2_ctrl_ops s3c_camif_video_ctrl_ops = {
+ .s_ctrl = s3c_camif_video_s_ctrl,
+};
+
+int s3c_camif_register_video_node(struct camif_dev *camif, int idx)
+{
+ struct camif_vp *vp = &camif->vp[idx];
+ struct vb2_queue *q = &vp->vb_queue;
+ struct video_device *vfd = &vp->vdev;
+ struct v4l2_ctrl *ctrl;
+ int ret;
+
+ memset(vfd, 0, sizeof(*vfd));
+ snprintf(vfd->name, sizeof(vfd->name), "camif-%s",
+ vp->id == 0 ? "codec" : "preview");
+
+ vfd->fops = &s3c_camif_fops;
+ vfd->ioctl_ops = &s3c_camif_ioctl_ops;
+ vfd->v4l2_dev = &camif->v4l2_dev;
+ vfd->minor = -1;
+ vfd->release = video_device_release_empty;
+ vfd->lock = &camif->lock;
+ vp->reqbufs_count = 0;
+
+ INIT_LIST_HEAD(&vp->pending_buf_q);
+ INIT_LIST_HEAD(&vp->active_buf_q);
+
+ memset(q, 0, sizeof(*q));
+ q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ q->io_modes = VB2_MMAP | VB2_USERPTR;
+ q->ops = &s3c_camif_qops;
+ q->mem_ops = &vb2_dma_contig_memops;
+ q->buf_struct_size = sizeof(struct camif_buffer);
+ q->drv_priv = vp;
+
+ vb2_queue_init(q);
+
+ vp->pad.flags = MEDIA_PAD_FL_SINK;
+ ret = media_entity_init(&vfd->entity, 1, &vp->pad, 0);
+ if (ret)
+ goto err;
+
+ video_set_drvdata(vfd, vp);
+ set_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
+
+ v4l2_ctrl_handler_init(&vp->ctrl_handler, 1);
+ ctrl = v4l2_ctrl_new_std(&vp->ctrl_handler, &s3c_camif_video_ctrl_ops,
+ V4L2_CID_HFLIP, 0, 1, 1, 0);
+ if (ctrl)
+ ctrl->priv = vp;
+ ctrl = v4l2_ctrl_new_std(&vp->ctrl_handler, &s3c_camif_video_ctrl_ops,
+ V4L2_CID_VFLIP, 0, 1, 1, 0);
+ if (ctrl)
+ ctrl->priv = vp;
+
+ ret = vp->ctrl_handler.error;
+ if (ret < 0)
+ goto err_ctrl;
+
+ vfd->ctrl_handler = &vp->ctrl_handler;
+
+ ret = video_register_device(vfd, VFL_TYPE_GRABBER, -1);
+ if (ret)
+ goto err_vd;
+
+ v4l2_info(&camif->v4l2_dev, "registered %s as /dev/%s\n",
+ vfd->name, video_device_node_name(vfd));
+ return 0;
+
+ err_vd:
+ v4l2_ctrl_handler_free(&vp->ctrl_handler);
+ err_ctrl:
+ media_entity_cleanup(&vfd->entity);
+ err:
+ video_device_release(vfd);
+ return ret;
+}
+
+void s3c_camif_unregister_video_node(struct camif_dev *camif, int idx)
+{
+ struct video_device *vfd = &camif->vp[idx].vdev;
+
+ if (video_is_registered(vfd)) {
+ video_unregister_device(vfd);
+ media_entity_cleanup(&vfd->entity);
+ v4l2_ctrl_handler_free(vfd->ctrl_handler);
+ }
+}
+
+/* Media bus pixel formats supported at the camif input */
+static const enum v4l2_mbus_pixelcode camif_mbus_formats[] = {
+ V4L2_MBUS_FMT_YUYV8_2X8,
+ V4L2_MBUS_FMT_YVYU8_2X8,
+ V4L2_MBUS_FMT_UYVY8_2X8,
+ V4L2_MBUS_FMT_VYUY8_2X8,
+};
+
+/*
+ * Camera input interface subdev operations
+ */
+
+static int s3c_camif_subdev_enum_mbus_code(struct v4l2_subdev *sd,
+ struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_mbus_code_enum *code)
+{
+ if (code->index >= ARRAY_SIZE(camif_mbus_formats))
+ return -EINVAL;
+
+ code->code = camif_mbus_formats[code->index];
+ return 0;
+}
+
+static int s3c_camif_subdev_get_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_format *fmt)
+{
+ struct camif_dev *camif = v4l2_get_subdevdata(sd);
+ struct v4l2_mbus_framefmt *mf = &fmt->format;
+
+ if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
+ mf = v4l2_subdev_get_try_format(fh, fmt->pad);
+ fmt->format = *mf;
+ return 0;
+ }
+
+ mutex_lock(&camif->lock);
+
+ switch (fmt->pad) {
+ case CAMIF_SD_PAD_SINK:
+ /* full camera input pixel size */
+ *mf = camif->mbus_fmt;
+ break;
+
+ case CAMIF_SD_PAD_SOURCE_C...CAMIF_SD_PAD_SOURCE_P:
+ /* crop rectangle at camera interface input */
+ mf->width = camif->camif_crop.width;
+ mf->height = camif->camif_crop.height;
+ mf->code = camif->mbus_fmt.code;
+ break;
+ }
+
+ mutex_unlock(&camif->lock);
+ mf->colorspace = V4L2_COLORSPACE_JPEG;
+ return 0;
+}
+
+static void __camif_subdev_try_format(struct camif_dev *camif,
+ struct v4l2_mbus_framefmt *mf, int pad)
+{
+ const struct s3c_camif_variant *variant = camif->variant;
+ const struct vp_pix_limits *pix_lim;
+ int i = ARRAY_SIZE(camif_mbus_formats);
+
+ /* FIXME: constraints against codec or preview path ? */
+ pix_lim = &variant->vp_pix_limits[VP_CODEC];
+
+ while (i-- >= 0)
+ if (camif_mbus_formats[i] == mf->code)
+ break;
+
+ mf->code = camif_mbus_formats[i];
+
+ if (pad == CAMIF_SD_PAD_SINK) {
+ v4l_bound_align_image(&mf->width, 8, CAMIF_MAX_PIX_WIDTH,
+ ffs(pix_lim->out_width_align) - 1,
+ &mf->height, 8, CAMIF_MAX_PIX_HEIGHT, 0,
+ 0);
+ } else {
+ struct v4l2_rect *crop = &camif->camif_crop;
+ v4l_bound_align_image(&mf->width, 8, crop->width,
+ ffs(pix_lim->out_width_align) - 1,
+ &mf->height, 8, crop->height,
+ 0, 0);
+ }
+
+ v4l2_dbg(1, debug, &camif->subdev, "%ux%u\n", mf->width, mf->height);
+}
+
+static int s3c_camif_subdev_set_fmt(struct v4l2_subdev *sd,
+ struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_format *fmt)
+{
+ struct camif_dev *camif = v4l2_get_subdevdata(sd);
+ struct v4l2_mbus_framefmt *mf = &fmt->format;
+ struct v4l2_rect *crop = &camif->camif_crop;
+ int i;
+
+ v4l2_dbg(1, debug, sd, "pad%d: code: 0x%x, %ux%u\n",
+ fmt->pad, mf->code, mf->width, mf->height);
+
+ mf->colorspace = V4L2_COLORSPACE_JPEG;
+ mutex_lock(&camif->lock);
+
+ /*
+ * No pixel format change at the camera input is allowed
+ * while streaming.
+ */
+ if (vb2_is_busy(&camif->vp[VP_CODEC].vb_queue) ||
+ vb2_is_busy(&camif->vp[VP_PREVIEW].vb_queue)) {
+ mutex_unlock(&camif->lock);
+ return -EBUSY;
+ }
+
+ __camif_subdev_try_format(camif, mf, fmt->pad);
+
+ if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) {
+ mf = v4l2_subdev_get_try_format(fh, fmt->pad);
+ *mf = fmt->format;
+ mutex_unlock(&camif->lock);
+ return 0;
+ }
+
+ switch (fmt->pad) {
+ case CAMIF_SD_PAD_SINK:
+ camif->mbus_fmt = *mf;
+ /* Reset sink crop rectangle. */
+ crop->width = mf->width;
+ crop->height = mf->height;
+ crop->left = 0;
+ crop->top = 0;
+ /*
+ * Reset source format (the camif's crop rectangle)
+ * and the video output resolution.
+ */
+ for (i = 0; i < CAMIF_VP_NUM; i++) {
+ struct camif_frame *frame = &camif->vp[i].out_frame;
+ frame->rect = *crop;
+ frame->f_width = mf->width;
+ frame->f_height = mf->height;
+ }
+ break;
+
+ case CAMIF_SD_PAD_SOURCE_C...CAMIF_SD_PAD_SOURCE_P:
+ /* Pixel format can be only changed on the sink pad. */
+ mf->code = camif->mbus_fmt.code;
+ mf->width = crop->width;
+ mf->height = crop->height;
+ break;
+ }
+
+ mutex_unlock(&camif->lock);
+ return 0;
+}
+
+static int s3c_camif_subdev_get_selection(struct v4l2_subdev *sd,
+ struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_selection *sel)
+{
+ struct camif_dev *camif = v4l2_get_subdevdata(sd);
+ struct v4l2_rect *crop = &camif->camif_crop;
+ struct v4l2_mbus_framefmt *mf = &camif->mbus_fmt;
+
+ if ((sel->target != V4L2_SEL_TGT_CROP &&
+ sel->target != V4L2_SEL_TGT_CROP_BOUNDS) ||
+ sel->pad != CAMIF_SD_PAD_SINK)
+ return -EINVAL;
+
+ if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
+ sel->r = *v4l2_subdev_get_try_crop(fh, sel->pad);
+ return 0;
+ }
+
+ mutex_lock(&camif->lock);
+
+ if (sel->target == V4L2_SEL_TGT_CROP) {
+ sel->r = *crop;
+ } else { /* crop bounds */
+ sel->r.width = mf->width;
+ sel->r.height = mf->height;
+ sel->r.left = 0;
+ sel->r.top = 0;
+ }
+
+ mutex_unlock(&camif->lock);
+
+ v4l2_dbg(1, debug, sd, "%s: crop: (%d,%d) %dx%d, size: %ux%u\n",
+ __func__, crop->left, crop->top, crop->width,
+ crop->height, mf->width, mf->height);
+
+ return 0;
+}
+
+static void __camif_try_crop(struct camif_dev *camif, struct v4l2_rect *r)
+{
+ struct v4l2_mbus_framefmt *mf = &camif->mbus_fmt;
+ const struct camif_pix_limits *pix_lim = &camif->variant->pix_limits;
+ unsigned int left = 2 * r->left;
+ unsigned int top = 2 * r->top;
+
+ /*
+ * Following constraints must be met:
+ * - r->width + 2 * r->left = mf->width;
+ * - r->height + 2 * r->top = mf->height;
+ * - crop rectangle size and position must be aligned
+ * to 8 or 2 pixels, depending on SoC version.
+ */
+ v4l_bound_align_image(&r->width, 0, mf->width,
+ ffs(pix_lim->win_hor_offset_align) - 1,
+ &r->height, 0, mf->height, 1, 0);
+
+ v4l_bound_align_image(&left, 0, mf->width - r->width,
+ ffs(pix_lim->win_hor_offset_align),
+ &top, 0, mf->height - r->height, 2, 0);
+
+ r->left = left / 2;
+ r->top = top / 2;
+ r->width = mf->width - left;
+ r->height = mf->height - top;
+ /*
+ * Make sure we either downscale or upscale both the pixel
+ * width and height. Just return current crop rectangle if
+ * this scaler constraint is not met.
+ */
+ if (camif->variant->ip_revision == S3C244X_CAMIF_IP_REV &&
+ camif_is_streaming(camif)) {
+ unsigned int i;
+
+ for (i = 0; i < CAMIF_VP_NUM; i++) {
+ struct v4l2_rect *or = &camif->vp[i].out_frame.rect;
+ if ((or->width > r->width) == (or->height > r->height))
+ continue;
+ *r = camif->camif_crop;
+ pr_debug("Width/height scaling direction limitation\n");
+ break;
+ }
+ }
+
+ v4l2_dbg(1, debug, &camif->v4l2_dev, "crop: (%d,%d)/%dx%d, fmt: %ux%u\n",
+ r->left, r->top, r->width, r->height, mf->width, mf->height);
+}
+
+static int s3c_camif_subdev_set_selection(struct v4l2_subdev *sd,
+ struct v4l2_subdev_fh *fh,
+ struct v4l2_subdev_selection *sel)
+{
+ struct camif_dev *camif = v4l2_get_subdevdata(sd);
+ struct v4l2_rect *crop = &camif->camif_crop;
+ struct camif_scaler scaler;
+
+ if (sel->target != V4L2_SEL_TGT_CROP || sel->pad != CAMIF_SD_PAD_SINK)
+ return -EINVAL;
+
+ mutex_lock(&camif->lock);
+ __camif_try_crop(camif, &sel->r);
+
+ if (sel->which == V4L2_SUBDEV_FORMAT_TRY) {
+ *v4l2_subdev_get_try_crop(fh, sel->pad) = sel->r;
+ } else {
+ unsigned long flags;
+ unsigned int i;
+
+ spin_lock_irqsave(&camif->slock, flags);
+ *crop = sel->r;
+
+ for (i = 0; i < CAMIF_VP_NUM; i++) {
+ struct camif_vp *vp = &camif->vp[i];
+ scaler = vp->scaler;
+ if (s3c_camif_get_scaler_config(vp, &scaler))
+ continue;
+ vp->scaler = scaler;
+ vp->state |= ST_VP_CONFIG;
+ }
+
+ spin_unlock_irqrestore(&camif->slock, flags);
+ }
+ mutex_unlock(&camif->lock);
+
+ v4l2_dbg(1, debug, sd, "%s: (%d,%d) %dx%d, f_w: %u, f_h: %u\n",
+ __func__, crop->left, crop->top, crop->width, crop->height,
+ camif->mbus_fmt.width, camif->mbus_fmt.height);
+
+ return 0;
+}
+
+static const struct v4l2_subdev_pad_ops s3c_camif_subdev_pad_ops = {
+ .enum_mbus_code = s3c_camif_subdev_enum_mbus_code,
+ .get_selection = s3c_camif_subdev_get_selection,
+ .set_selection = s3c_camif_subdev_set_selection,
+ .get_fmt = s3c_camif_subdev_get_fmt,
+ .set_fmt = s3c_camif_subdev_set_fmt,
+};
+
+static struct v4l2_subdev_ops s3c_camif_subdev_ops = {
+ .pad = &s3c_camif_subdev_pad_ops,
+};
+
+static int s3c_camif_subdev_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct camif_dev *camif = container_of(ctrl->handler, struct camif_dev,
+ ctrl_handler);
+ unsigned long flags;
+
+ spin_lock_irqsave(&camif->slock, flags);
+ camif->vp[VP_CODEC].state |= ST_VP_CONFIG;
+ camif->vp[VP_PREVIEW].state |= ST_VP_CONFIG;
+ spin_unlock_irqrestore(&camif->slock, flags);
+
+ return 0;
+}
+
+static const struct v4l2_ctrl_ops s3c_camif_subdev_ctrl_ops = {
+ .s_ctrl = s3c_camif_subdev_s_ctrl,
+};
+
+static const struct v4l2_ctrl_config s3c_camif_priv_ctrl = {
+ .ops = &s3c_camif_subdev_ctrl_ops,
+ .id = V4L2_CTRL_CLASS_USER | 0x1001,
+ .type = V4L2_CTRL_TYPE_INTEGER,
+ .name = "Test Pattern",
+ .min = 0,
+ .max = 3,
+ .step = 1,
+ .def = 0,
+};
+
+int s3c_camif_create_subdev(struct camif_dev *camif)
+{
+ struct v4l2_ctrl_handler *handler = &camif->ctrl_handler;
+ struct v4l2_subdev *sd = &camif->subdev;
+ int ret;
+
+ v4l2_subdev_init(sd, &s3c_camif_subdev_ops);
+ sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+ strlcpy(sd->name, "S3C-CAMIF", sizeof(sd->name));
+
+ camif->pads[CAMIF_SD_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
+ camif->pads[CAMIF_SD_PAD_SOURCE_C].flags = MEDIA_PAD_FL_SOURCE;
+ camif->pads[CAMIF_SD_PAD_SOURCE_P].flags = MEDIA_PAD_FL_SOURCE;
+
+ ret = media_entity_init(&sd->entity, CAMIF_SD_PADS_NUM,
+ camif->pads, 0);
+ if (ret)
+ return ret;
+
+ v4l2_ctrl_handler_init(handler, 1);
+ camif->test_pattern = v4l2_ctrl_new_custom(handler,
+ &s3c_camif_priv_ctrl, NULL);
+ if (handler->error) {
+ media_entity_cleanup(&sd->entity);
+ return handler->error;
+ }
+
+ sd->ctrl_handler = handler;
+ v4l2_set_subdevdata(sd, camif);
+
+ return 0;
+}
+
+void s3c_camif_unregister_subdev(struct camif_dev *camif)
+{
+ struct v4l2_subdev *sd = &camif->subdev;
+
+ /* Return if not registered */
+ if (v4l2_get_subdevdata(sd) == NULL)
+ return;
+
+ v4l2_device_unregister_subdev(sd);
+ media_entity_cleanup(&sd->entity);
+ v4l2_ctrl_handler_free(&camif->ctrl_handler);
+ v4l2_set_subdevdata(sd, NULL);
+}
+
+int s3c_camif_set_defaults(struct camif_dev *camif)
+{
+ unsigned int ip_rev = camif->variant->ip_revision;
+ int i;
+
+ for (i = 0; i < CAMIF_VP_NUM; i++) {
+ struct camif_vp *vp = &camif->vp[i];
+ struct camif_frame *f = &vp->out_frame;
+
+ vp->camif = camif;
+ vp->id = i;
+ vp->offset = camif->variant->vp_offset;
+
+ if (ip_rev == S3C244X_CAMIF_IP_REV)
+ vp->fmt_flags = i ? FMT_FL_S3C24XX_PREVIEW :
+ FMT_FL_S3C24XX_CODEC;
+ else
+ vp->fmt_flags = FMT_FL_S3C64XX;
+
+ vp->out_fmt = s3c_camif_find_format(vp, NULL, 0);
+ BUG_ON(vp->out_fmt == NULL);
+
+ memset(f, 0, sizeof(*f));
+ f->f_width = CAMIF_DEF_WIDTH;
+ f->f_height = CAMIF_DEF_HEIGHT;
+ f->rect.width = CAMIF_DEF_WIDTH;
+ f->rect.height = CAMIF_DEF_HEIGHT;
+
+ /* Scaler is always enabled */
+ vp->scaler.enable = 1;
+
+ vp->payload = (f->f_width * f->f_height *
+ vp->out_fmt->depth) / 8;
+ }
+
+ memset(&camif->mbus_fmt, 0, sizeof(camif->mbus_fmt));
+ camif->mbus_fmt.width = CAMIF_DEF_WIDTH;
+ camif->mbus_fmt.height = CAMIF_DEF_HEIGHT;
+ camif->mbus_fmt.code = camif_mbus_formats[0];
+
+ memset(&camif->camif_crop, 0, sizeof(camif->camif_crop));
+ camif->camif_crop.width = CAMIF_DEF_WIDTH;
+ camif->camif_crop.height = CAMIF_DEF_HEIGHT;
+
+ return 0;
+}
new file mode 100644
@@ -0,0 +1,661 @@
+/*
+ * s3c24xx/s3c64xx SoC series Camera Interface (CAMIF) driver
+ *
+ * Copyright (C) 2012 Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
+ * Copyright (C) 2012 Tomasz Figa <tomasz.figa@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.
+ */
+#define pr_fmt(fmt) "%s:%d " fmt, __func__, __LINE__
+
+#include <linux/bug.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/gpio.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+
+#include <media/media-device.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-ioctl.h>
+#include <media/videobuf2-core.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include "camif-core.h"
+
+static char *camif_clocks[CLK_MAX_NUM] = {
+ /* HCLK CAMIF clock */
+ [CLK_GATE] = "camif",
+ /* CAMIF / external camera sensor master clock */
+ [CLK_CAM] = "camera",
+};
+
+static const struct camif_fmt camif_formats[] = {
+ {
+ .name = "YUV 4:2:2 planar, Y/Cb/Cr",
+ .fourcc = V4L2_PIX_FMT_YUV422P,
+ .depth = 16,
+ .ybpp = 1,
+ .color = IMG_FMT_YCBCR422P,
+ .colplanes = 3,
+ .flags = FMT_FL_S3C24XX_CODEC |
+ FMT_FL_S3C64XX,
+ }, {
+ .name = "YUV 4:2:0 planar, Y/Cb/Cr",
+ .fourcc = V4L2_PIX_FMT_YUV420,
+ .depth = 12,
+ .ybpp = 1,
+ .color = IMG_FMT_YCBCR420,
+ .colplanes = 3,
+ .flags = FMT_FL_S3C24XX_CODEC |
+ FMT_FL_S3C64XX,
+ }, {
+ .name = "YVU 4:2:0 planar, Y/Cr/Cb",
+ .fourcc = V4L2_PIX_FMT_YVU420,
+ .depth = 12,
+ .ybpp = 1,
+ .color = IMG_FMT_YCRCB420,
+ .colplanes = 3,
+ .flags = FMT_FL_S3C24XX_CODEC |
+ FMT_FL_S3C64XX,
+ }, {
+ .name = "RGB565, 16 bpp",
+ .fourcc = V4L2_PIX_FMT_RGB565X,
+ .depth = 16,
+ .ybpp = 2,
+ .color = IMG_FMT_RGB565,
+ .colplanes = 1,
+ .flags = FMT_FL_S3C24XX_PREVIEW |
+ FMT_FL_S3C64XX,
+ }, {
+ .name = "XRGB8888, 32 bpp",
+ .fourcc = V4L2_PIX_FMT_RGB32,
+ .depth = 32,
+ .ybpp = 4,
+ .color = IMG_FMT_XRGB8888,
+ .colplanes = 1,
+ .flags = FMT_FL_S3C24XX_PREVIEW |
+ FMT_FL_S3C64XX,
+ }, {
+ .name = "BGR666",
+ .fourcc = V4L2_PIX_FMT_BGR666,
+ .depth = 32,
+ .ybpp = 4,
+ .color = IMG_FMT_RGB666,
+ .colplanes = 1,
+ .flags = FMT_FL_S3C64XX,
+ }
+};
+
+/**
+ * s3c_camif_find_format - lookup camif color format by fourcc or an index
+ * @pixelformat: fourcc to match, ignored if null
+ * @index: index to the camif_formats array, ignored if negative
+ */
+const struct camif_fmt *s3c_camif_find_format(struct camif_vp *vp,
+ const u32 *pixelformat,
+ int index)
+{
+ const struct camif_fmt *fmt, *def_fmt = NULL;
+ unsigned int i;
+ int id = 0;
+
+ if (index >= (int)ARRAY_SIZE(camif_formats))
+ return NULL;
+
+ for (i = 0; i < ARRAY_SIZE(camif_formats); ++i) {
+ fmt = &camif_formats[i];
+ if (vp && !(vp->fmt_flags & fmt->flags))
+ continue;
+ if (pixelformat && fmt->fourcc == *pixelformat)
+ return fmt;
+ if (index == id)
+ def_fmt = fmt;
+ id++;
+ }
+ return def_fmt;
+}
+
+static int camif_get_scaler_factor(u32 src, u32 tar, u32 *ratio, u32 *shift)
+{
+ unsigned int sh = 6;
+
+ if (src >= 64 * tar)
+ return -EINVAL;
+
+ while (sh--) {
+ unsigned int tmp = 1 << sh;
+ if (src >= tar * tmp) {
+ *shift = sh, *ratio = tmp;
+ return 0;
+ }
+ }
+ *shift = 0, *ratio = 1;
+ return 0;
+}
+
+int s3c_camif_get_scaler_config(struct camif_vp *vp,
+ struct camif_scaler *scaler)
+{
+ struct v4l2_rect *camif_crop = &vp->camif->camif_crop;
+ int source_x = camif_crop->width;
+ int source_y = camif_crop->height;
+ int target_x = vp->out_frame.rect.width;
+ int target_y = vp->out_frame.rect.height;
+ int ret;
+
+ if (vp->rotation == 90 || vp->rotation == 270)
+ swap(target_x, target_y);
+
+ ret = camif_get_scaler_factor(source_x, target_x, &scaler->pre_h_ratio,
+ &scaler->h_shift);
+ if (ret < 0)
+ return ret;
+
+ ret = camif_get_scaler_factor(source_y, target_y, &scaler->pre_v_ratio,
+ &scaler->v_shift);
+ if (ret < 0)
+ return ret;
+
+ scaler->pre_dst_width = source_x / scaler->pre_h_ratio;
+ scaler->pre_dst_height = source_y / scaler->pre_v_ratio;
+
+ scaler->main_h_ratio = (source_x << 8) / (target_x << scaler->h_shift);
+ scaler->main_v_ratio = (source_y << 8) / (target_y << scaler->v_shift);
+
+ scaler->scaleup_h = (target_x >= source_x);
+ scaler->scaleup_v = (target_y >= source_y);
+
+ scaler->copy = 0;
+
+ pr_debug("H: ratio: %u, shift: %u. V: ratio: %u, shift: %u.\n",
+ scaler->pre_h_ratio, scaler->h_shift,
+ scaler->pre_v_ratio, scaler->v_shift);
+
+ pr_debug("Source: %dx%d, Target: %dx%d, scaleup_h/v: %d/%d\n",
+ source_x, source_y, target_x, target_y,
+ scaler->scaleup_h, scaler->scaleup_v);
+
+ return 0;
+}
+
+static int camif_register_sensor(struct camif_dev *camif)
+{
+ struct s3c_camif_sensor_info *sensor = &camif->pdata.sensor;
+ struct v4l2_device *v4l2_dev = &camif->v4l2_dev;
+ struct i2c_adapter *adapter;
+ struct v4l2_subdev_format format;
+ struct v4l2_subdev *sd;
+ int ret;
+
+ camif->sensor.sd = NULL;
+
+ if (sensor->i2c_board_info.addr == 0)
+ return -EINVAL;
+
+ adapter = i2c_get_adapter(sensor->i2c_bus_num);
+ if (adapter == NULL) {
+ v4l2_warn(v4l2_dev, "failed to get I2C adapter %d\n",
+ sensor->i2c_bus_num);
+ return -EPROBE_DEFER;
+ }
+
+ sd = v4l2_i2c_new_subdev_board(v4l2_dev, adapter,
+ &sensor->i2c_board_info, NULL);
+ if (sd == NULL) {
+ i2c_put_adapter(adapter);
+ v4l2_warn(v4l2_dev, "failed to acquire subdev %s\n",
+ sensor->i2c_board_info.type);
+ return -EPROBE_DEFER;
+ }
+ camif->sensor.sd = sd;
+
+ v4l2_info(v4l2_dev, "registered sensor subdevice %s\n", sd->name);
+
+ /* Get initial pixel format and set it at the camif sink pad */
+ format.pad = 0;
+ format.which = V4L2_SUBDEV_FORMAT_ACTIVE;
+ ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &format);
+
+ if (ret < 0)
+ return 0;
+
+ format.pad = CAMIF_SD_PAD_SINK;
+ v4l2_subdev_call(&camif->subdev, pad, set_fmt, NULL, &format);
+
+ v4l2_info(sd, "Initial format from sensor: %dx%d, %#x\n",
+ format.format.width, format.format.height,
+ format.format.code);
+ return 0;
+}
+
+static void camif_unregister_sensor(struct camif_dev *camif)
+{
+ struct v4l2_subdev *sd = camif->sensor.sd;
+ struct i2c_client *client = sd ? v4l2_get_subdevdata(sd) : NULL;
+ struct i2c_adapter *adapter;
+
+ if (client == NULL)
+ return;
+
+ adapter = client->adapter;
+ v4l2_device_unregister_subdev(sd);
+ camif->sensor.sd = NULL;
+ i2c_unregister_device(client);
+ if (adapter)
+ i2c_put_adapter(adapter);
+}
+
+static int camif_create_media_links(struct camif_dev *camif)
+{
+ int i, ret;
+
+ ret = media_entity_create_link(&camif->sensor.sd->entity, 0,
+ &camif->subdev.entity, CAMIF_SD_PAD_SINK,
+ MEDIA_LNK_FL_IMMUTABLE |
+ MEDIA_LNK_FL_ENABLED);
+ if (ret)
+ return ret;
+
+ for (i = 1; i < CAMIF_SD_PADS_NUM && !ret; i++) {
+ ret = media_entity_create_link(&camif->subdev.entity, i,
+ &camif->vp[i - 1].vdev.entity, 0,
+ MEDIA_LNK_FL_IMMUTABLE |
+ MEDIA_LNK_FL_ENABLED);
+ }
+
+ return ret;
+}
+
+static int camif_register_video_nodes(struct camif_dev *camif)
+{
+ int ret = s3c_camif_register_video_node(camif, VP_CODEC);
+ if (ret < 0)
+ return ret;
+
+ return s3c_camif_register_video_node(camif, VP_PREVIEW);
+}
+
+static void camif_unregister_video_nodes(struct camif_dev *camif)
+{
+ s3c_camif_unregister_video_node(camif, VP_CODEC);
+ s3c_camif_unregister_video_node(camif, VP_PREVIEW);
+}
+
+static void camif_unregister_media_entities(struct camif_dev *camif)
+{
+ camif_unregister_video_nodes(camif);
+ camif_unregister_sensor(camif);
+ s3c_camif_unregister_subdev(camif);
+}
+
+/*
+ * Media device
+ */
+static int camif_media_dev_register(struct camif_dev *camif)
+{
+ struct media_device *md = &camif->media_dev;
+ struct v4l2_device *v4l2_dev = &camif->v4l2_dev;
+ unsigned int ip_rev = camif->variant->ip_revision;
+ int ret;
+
+ memset(md, 0, sizeof(*md));
+ snprintf(md->model, sizeof(md->model), "SAMSUNG S3C%s CAMIF",
+ ip_rev == S3C6410_CAMIF_IP_REV ? "6410" : "244X");
+ strlcpy(md->bus_info, "platform", sizeof(md->bus_info));
+ md->hw_revision = ip_rev;
+ md->driver_version = KERNEL_VERSION(1, 0, 0);
+
+ md->dev = camif->dev;
+
+ strlcpy(v4l2_dev->name, "s3c-camif", sizeof(v4l2_dev->name));
+ v4l2_dev->mdev = md;
+
+ ret = v4l2_device_register(camif->dev, v4l2_dev);
+ if (ret < 0)
+ return ret;
+
+ ret = media_device_register(md);
+ if (ret < 0)
+ v4l2_device_unregister(v4l2_dev);
+
+ return ret;
+}
+
+static void camif_clk_put(struct camif_dev *camif)
+{
+ int i;
+
+ for (i = 0; i < CLK_MAX_NUM; i++) {
+ if (IS_ERR_OR_NULL(camif->clock[i]))
+ continue;
+ clk_unprepare(camif->clock[i]);
+ clk_put(camif->clock[i]);
+ }
+}
+
+static int camif_clk_get(struct camif_dev *camif)
+{
+ int ret, i;
+
+ for (i = 0; i < CLK_MAX_NUM; i++) {
+ camif->clock[i] = clk_get(camif->dev, camif_clocks[i]);
+ if (IS_ERR(camif->clock[i])) {
+ ret = PTR_ERR(camif->clock[i]);
+ goto err;
+ }
+ ret = clk_prepare(camif->clock[i]);
+ if (ret < 0) {
+ clk_put(camif->clock[i]);
+ camif->clock[i] = NULL;
+ goto err;
+ }
+ }
+ return 0;
+err:
+ camif_clk_put(camif);
+ dev_err(camif->dev, "failed to get clock: %s\n",
+ camif_clocks[i]);
+ return ret;
+}
+
+/*
+ * The CAMIF device has two relatively independent data processing paths
+ * that can source data from memory or the common camera input frontend.
+ * Register interrupts for each data processing path (camif_vp).
+ */
+static int camif_request_irqs(struct platform_device *pdev,
+ struct camif_dev *camif)
+{
+ int irq, ret, i;
+
+ for (i = 0; i < CAMIF_VP_NUM; i++) {
+ struct camif_vp *vp = &camif->vp[i];
+
+ init_waitqueue_head(&vp->irq_queue);
+
+ irq = platform_get_irq(pdev, i);
+ if (irq <= 0) {
+ dev_err(&pdev->dev, "failed to get IRQ %d\n", i);
+ return -ENXIO;
+ }
+
+ ret = devm_request_irq(&pdev->dev, irq, s3c_camif_irq_handler,
+ 0, dev_name(&pdev->dev), vp);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "failed to install IRQ: %d\n", ret);
+ break;
+ }
+ }
+
+ return ret;
+}
+
+static int s3c_camif_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct s3c_camif_plat_data *pdata = dev->platform_data;
+ struct s3c_camif_drvdata *drvdata;
+ struct camif_dev *camif;
+ struct resource *mres;
+ int ret = 0;
+
+ camif = devm_kzalloc(dev, sizeof(*camif), GFP_KERNEL);
+ if (!camif)
+ return -ENOMEM;
+
+ spin_lock_init(&camif->slock);
+ mutex_init(&camif->lock);
+
+ camif->dev = dev;
+
+ if (!pdata || !pdata->gpio_get || !pdata->gpio_put) {
+ dev_err(dev, "wrong platform data\n");
+ return -EINVAL;
+ }
+
+ camif->pdata = *pdata;
+ drvdata = (void *)platform_get_device_id(pdev)->driver_data;
+ camif->variant = drvdata->variant;
+
+ mres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+ camif->io_base = devm_request_and_ioremap(dev, mres);
+ if (!camif->io_base) {
+ dev_err(dev, "failed to obtain I/O memory\n");
+ return -ENOENT;
+ }
+
+ ret = camif_request_irqs(pdev, camif);
+ if (ret < 0)
+ return ret;
+
+ ret = pdata->gpio_get();
+ if (ret < 0)
+ return ret;
+
+ ret = s3c_camif_create_subdev(camif);
+ if (ret < 0)
+ goto err_sd;
+
+ ret = camif_clk_get(camif);
+ if (ret < 0)
+ goto err_clk;
+
+ platform_set_drvdata(pdev, camif);
+ clk_set_rate(camif->clock[CLK_CAM],
+ camif->pdata.sensor.clock_frequency);
+
+ dev_info(dev, "sensor clock frequency: %lu\n",
+ clk_get_rate(camif->clock[CLK_CAM]));
+
+ /*
+ * Set initial pixel format, resolution and crop rectangle.
+ * Must be done before a sensor subdev is registered as some
+ * settings are overrode with values from sensor subdev.
+ */
+ s3c_camif_set_defaults(camif);
+
+ pm_runtime_enable(dev);
+
+ ret = pm_runtime_get_sync(dev);
+ if (ret < 0)
+ goto err_pm;
+
+ /* Initialize contiguous memory allocator */
+ camif->alloc_ctx = vb2_dma_contig_init_ctx(dev);
+ if (IS_ERR(camif->alloc_ctx)) {
+ ret = PTR_ERR(camif->alloc_ctx);
+ goto err_alloc;
+ }
+
+ ret = camif_media_dev_register(camif);
+ if (ret < 0)
+ goto err_mdev;
+
+ ret = camif_register_sensor(camif);
+ if (ret < 0)
+ goto err_sens;
+
+ ret = v4l2_device_register_subdev(&camif->v4l2_dev, &camif->subdev);
+ if (ret < 0)
+ goto err_sens;
+
+ mutex_lock(&camif->media_dev.graph_mutex);
+
+ ret = v4l2_device_register_subdev_nodes(&camif->v4l2_dev);
+ if (ret < 0)
+ goto err_unlock;
+
+ ret = camif_register_video_nodes(camif);
+ if (ret < 0)
+ goto err_unlock;
+
+ ret = camif_create_media_links(camif);
+ if (ret < 0)
+ goto err_unlock;
+
+ mutex_unlock(&camif->media_dev.graph_mutex);
+ pm_runtime_put(dev);
+ return 0;
+
+err_unlock:
+ mutex_unlock(&camif->media_dev.graph_mutex);
+err_sens:
+ v4l2_device_unregister(&camif->v4l2_dev);
+ media_device_unregister(&camif->media_dev);
+ camif_unregister_media_entities(camif);
+err_mdev:
+ vb2_dma_contig_cleanup_ctx(camif->alloc_ctx);
+err_alloc:
+ pm_runtime_put(dev);
+ pm_runtime_disable(dev);
+err_pm:
+ camif_clk_put(camif);
+err_clk:
+ s3c_camif_unregister_subdev(camif);
+err_sd:
+ pdata->gpio_put();
+ return ret;
+}
+
+static int __devexit s3c_camif_remove(struct platform_device *pdev)
+{
+ struct camif_dev *camif = platform_get_drvdata(pdev);
+ struct s3c_camif_plat_data *pdata = &camif->pdata;
+
+ media_device_unregister(&camif->media_dev);
+ camif_unregister_media_entities(camif);
+ v4l2_device_unregister(&camif->v4l2_dev);
+
+ pm_runtime_disable(&pdev->dev);
+ camif_clk_put(camif);
+ pdata->gpio_put();
+
+ return 0;
+}
+
+static int s3c_camif_runtime_resume(struct device *dev)
+{
+ struct camif_dev *camif = dev_get_drvdata(dev);
+
+ clk_enable(camif->clock[CLK_GATE]);
+ /* null op on s3c244x */
+ clk_enable(camif->clock[CLK_CAM]);
+ return 0;
+}
+
+static int s3c_camif_runtime_suspend(struct device *dev)
+{
+ struct camif_dev *camif = dev_get_drvdata(dev);
+
+ clk_disable(camif->clock[CLK_CAM]);
+ /* null op on s3c244x */
+ clk_disable(camif->clock[CLK_GATE]);
+ return 0;
+}
+
+static const struct s3c_camif_variant s3c244x_camif_variant = {
+ .vp_pix_limits = {
+ [VP_CODEC] = {
+ .max_out_width = 4096,
+ .max_sc_out_width = 2048,
+ .out_width_align = 16,
+ .min_out_width = 16,
+ .max_height = 4096,
+ },
+ [VP_PREVIEW] = {
+ .max_out_width = 640,
+ .max_sc_out_width = 640,
+ .out_width_align = 16,
+ .min_out_width = 16,
+ .max_height = 480,
+ }
+ },
+ .pix_limits = {
+ .win_hor_offset_align = 8,
+ },
+ .ip_revision = S3C244X_CAMIF_IP_REV,
+};
+
+static struct s3c_camif_drvdata s3c244x_camif_drvdata = {
+ .variant = &s3c244x_camif_variant,
+ .bus_clk_freq = 24000000UL,
+};
+
+static const struct s3c_camif_variant s3c6410_camif_variant = {
+ .vp_pix_limits = {
+ [VP_CODEC] = {
+ .max_out_width = 4096,
+ .max_sc_out_width = 2048,
+ .out_width_align = 16,
+ .min_out_width = 16,
+ .max_height = 4096,
+ },
+ [VP_PREVIEW] = {
+ .max_out_width = 4096,
+ .max_sc_out_width = 720,
+ .out_width_align = 16,
+ .min_out_width = 16,
+ .max_height = 4096,
+ }
+ },
+ .pix_limits = {
+ .win_hor_offset_align = 8,
+ },
+ .ip_revision = S3C6410_CAMIF_IP_REV,
+ .vp_offset = 0x20,
+};
+
+static struct s3c_camif_drvdata s3c6410_camif_drvdata = {
+ .variant = &s3c6410_camif_variant,
+ .bus_clk_freq = 133000000UL,
+};
+
+static struct platform_device_id s3c_camif_driver_ids[] = {
+ {
+ .name = "s3c2440-camif",
+ .driver_data = (unsigned long)&s3c244x_camif_drvdata,
+ }, {
+ .name = "s3c6410-camif",
+ .driver_data = (unsigned long)&s3c6410_camif_drvdata,
+ },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(platform, s3c_camif_driver_ids);
+
+static const struct dev_pm_ops s3c_camif_pm_ops = {
+ .runtime_suspend = s3c_camif_runtime_suspend,
+ .runtime_resume = s3c_camif_runtime_resume,
+};
+
+static struct platform_driver s3c_camif_driver = {
+ .probe = s3c_camif_probe,
+ .remove = __devexit_p(s3c_camif_remove),
+ .id_table = s3c_camif_driver_ids,
+ .driver = {
+ .name = S3C_CAMIF_DRIVER_NAME,
+ .owner = THIS_MODULE,
+ .pm = &s3c_camif_pm_ops,
+ }
+};
+
+module_platform_driver(s3c_camif_driver);
+
+MODULE_AUTHOR("Sylwester Nawrocki <sylvester.nawrocki@gmail.com>");
+MODULE_AUTHOR("Tomasz Figa <tomasz.figa@gmail.com>");
+MODULE_DESCRIPTION("S3C244X/S3C64XX SoC camera interface driver");
+MODULE_LICENSE("GPL");
new file mode 100644
@@ -0,0 +1,381 @@
+/*
+ * s3c244x/s3c64xx SoC series Camera Interface (CAMIF) driver
+ *
+ * Copyright (C) 2012 Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
+ * Copyright (C) 2012 Tomasz Figa <tomasz.figa@gmail.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 CAMIF_CORE_H_
+#define CAMIF_CORE_H_
+
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/platform_device.h>
+#include <linux/sched.h>
+#include <linux/spinlock.h>
+#include <linux/types.h>
+#include <linux/videodev2.h>
+
+#include <media/media-entity.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-mediabus.h>
+#include <media/videobuf2-core.h>
+#include <media/s3c_camif.h>
+
+#define S3C_CAMIF_DRIVER_NAME "s3c-camif"
+#define CAMIF_REQ_BUFS_MIN 3
+#define CAMIF_MAX_OUT_BUFS 4
+#define CAMIF_MAX_PIX_WIDTH 4096
+#define CAMIF_MAX_PIX_HEIGHT 4096
+#define SCALER_MAX_RATIO 64
+#define CAMIF_DEF_WIDTH 640
+#define CAMIF_DEF_HEIGHT 480
+#define CAMIF_STOP_TIMEOUT 1500 /* ms */
+
+#define S3C244X_CAMIF_IP_REV 0x20 /* 2.0 */
+#define S3C6410_CAMIF_IP_REV 0x32 /* 3.2 */
+
+/* struct camif_vp::state */
+
+#define ST_VP_PENDING (1 << 0)
+#define ST_VP_RUNNING (1 << 1)
+#define ST_VP_STREAMING (1 << 2)
+#define ST_VP_SENSOR_STREAMING (1 << 3)
+
+#define ST_VP_ABORTING (1 << 4)
+#define ST_VP_OFF (1 << 5)
+#define ST_VP_LASTIRQ (1 << 6)
+
+#define ST_VP_CONFIG (1 << 8)
+
+#define CAMIF_SD_PAD_SINK 0
+#define CAMIF_SD_PAD_SOURCE_C 1
+#define CAMIF_SD_PAD_SOURCE_P 2
+#define CAMIF_SD_PADS_NUM 3
+
+enum img_fmt {
+ IMG_FMT_RGB565 = 0x0010,
+ IMG_FMT_RGB666,
+ IMG_FMT_XRGB8888,
+ IMG_FMT_YCBCR420 = 0x0020,
+ IMG_FMT_YCRCB420,
+ IMG_FMT_YCBCR422P,
+ IMG_FMT_YCBYCR422 = 0x0040,
+ IMG_FMT_YCRYCB422,
+ IMG_FMT_CBYCRY422,
+ IMG_FMT_CRYCBY422,
+};
+
+#define img_fmt_is_rgb(x) ((x) & 0x10)
+#define img_fmt_is_ycbcr(x) ((x) & 0x60)
+
+/* Possible values for struct camif_fmt::flags */
+#define FMT_FL_S3C24XX_CODEC (1 << 0)
+#define FMT_FL_S3C24XX_PREVIEW (1 << 1)
+#define FMT_FL_S3C64XX (1 << 2)
+
+/**
+ * struct camif_fmt - pixel format description
+ * @fourcc: fourcc code for this format, 0 if not applicable
+ * @color: a corresponding enum img_fmt
+ * @colplanes: number of physically contiguous data planes
+ * @depth: bits per pixel (total)
+ * @ybpp: number of luminance bytes per pixel
+ */
+struct camif_fmt {
+ char *name;
+ u32 fourcc;
+ u32 color;
+ u16 colplanes;
+ u16 flags;
+ u8 depth;
+ u8 ybpp;
+};
+
+/**
+ * struct camif_dma_offset - pixel offset information for DMA
+ * @initial: offset (in pixels) to first pixel
+ * @line: offset (in pixels) from end of line to start of next line
+ */
+struct camif_dma_offset {
+ int initial;
+ int line;
+};
+
+/**
+ * struct camif_frame - source/target frame properties
+ * @f_width: full pixel width
+ * @f_height: full pixel height
+ * @rect: crop/composition rectangle
+ * @dma_offset: DMA offset configuration
+ */
+struct camif_frame {
+ u16 f_width;
+ u16 f_height;
+ struct v4l2_rect rect;
+ struct camif_dma_offset dma_offset;
+};
+
+/* CAMIF clocks enumeration */
+enum {
+ CLK_GATE,
+ CLK_CAM,
+ CLK_MAX_NUM,
+};
+
+struct vp_pix_limits {
+ u16 max_out_width;
+ u16 max_sc_out_width;
+ u16 out_width_align;
+ u16 max_height;
+ u8 min_out_width;
+ u16 out_hor_offset_align;
+};
+
+struct camif_pix_limits {
+ u16 win_hor_offset_align;
+};
+
+/**
+ * struct s3c_camif_variant - CAMIF variant structure
+ * @vp_pix_limits: pixel limits for the codec and preview paths
+ * @camif_pix_limits: pixel limits for the camera input interface
+ * @ip_revision: the CAMIF IP revision: 0x20 for s3c244x, 0x32 for s3c6410
+ */
+struct s3c_camif_variant {
+ struct vp_pix_limits vp_pix_limits[2];
+ struct camif_pix_limits pix_limits;
+ u8 ip_revision;
+ unsigned int vp_offset;
+};
+
+struct s3c_camif_drvdata {
+ const struct s3c_camif_variant *variant;
+ unsigned long bus_clk_freq;
+};
+
+struct camif_scaler {
+ u8 scaleup_h;
+ u8 scaleup_v;
+ u8 copy;
+ u8 enable;
+ u32 h_shift;
+ u32 v_shift;
+ u32 pre_h_ratio;
+ u32 pre_v_ratio;
+ u32 pre_dst_width;
+ u32 pre_dst_height;
+ u32 main_h_ratio;
+ u32 main_v_ratio;
+};
+
+struct camif_dev;
+
+/**
+ * struct camif_vp - CAMIF data processing path structure (codec/preview)
+ * @irq_queue: interrupt handling waitqueue
+ * @irq: interrupt number for the selected data path
+ * @camif: pointer to the camif structure
+ * @pad: media pad for the video node
+ * @vdev video device
+ * @ctrl_handler: video node controls handler
+ * @owner: file handle that own the streaming
+ * @pending_buf_q: pending (empty) buffers queue head
+ * @active_buf_q: active (being written) buffers queue head
+ * @active_buffers: counter of buffer set up at the DMA engine
+ * @buf_index: identifier of a last empty buffer set up in H/W
+ * @frame_sequence: image frame sequence counter
+ * @reqbufs_count: number of the queue buffers requested
+ * @scaler: the scaler structure
+ * @out_fmt: pixel format at this video path output
+ * @payload: an output data frame payload size
+ * @out_frame: an output pixel resolution
+ * @state: the video path state
+ * @fmt_flags: flags determining supported pixel formats
+ * @id: CAMIF id, 0 - codec, 1 - preview
+ * @rotation: current image rotation value
+ * @hflip: apply horizontal flip if set
+ * @vflip: apply vertical flip if set
+ */
+struct camif_vp {
+ wait_queue_head_t irq_queue;
+ int irq;
+ struct camif_dev *camif;
+ struct media_pad pad;
+ struct video_device vdev;
+ struct v4l2_ctrl_handler ctrl_handler;
+ struct v4l2_fh *owner;
+ struct vb2_queue vb_queue;
+ struct list_head pending_buf_q;
+ struct list_head active_buf_q;
+ unsigned int active_buffers;
+ unsigned int buf_index;
+ unsigned int frame_sequence;
+ unsigned int reqbufs_count;
+ struct camif_scaler scaler;
+ const struct camif_fmt *out_fmt;
+ unsigned int payload;
+ struct camif_frame out_frame;
+ unsigned int state;
+ u16 fmt_flags;
+ u8 id;
+ u8 rotation;
+ u8 hflip;
+ u8 vflip;
+ unsigned int offset;
+};
+
+/* Video processing path enumeration */
+#define VP_CODEC 0
+#define VP_PREVIEW 1
+#define CAMIF_VP_NUM 2
+
+/**
+ * struct camif_dev - the CAMIF driver private data structure
+ * @media_dev: top-level media device structure
+ * @v4l2_dev: root v4l2_device
+ * @subdev: camera interface ("catchcam") subdev
+ * @mbus_fmt: camera input media bus format
+ * @camif_crop: camera input interface crop rectangle
+ * @pads: the camif subdev's media pads
+ * @stream_count: the camera interface streaming reference counter
+ * @sensor: image sensor data structure
+ * @m_pipeline: video entity pipeline description
+ * @ctrl_handler: v4l2 control handler (owned by @subdev)
+ * @test_pattern: test pattern controls
+ * @vp: video path (DMA) description (codec/preview)
+ * @alloc_ctx: memory buffer allocator context
+ * @variant: variant information for this device
+ * @dev: pointer to the CAMIF device struct
+ * @pdata: a copy of the driver's platform data
+ * @clock: clocks required for the CAMIF operation
+ * @lock: mutex protecting this data structure
+ * @slock: spinlock protecting CAMIF registers
+ * @io_base: start address of the mmaped CAMIF registers
+ */
+struct camif_dev {
+ struct media_device media_dev;
+ struct v4l2_device v4l2_dev;
+ struct v4l2_subdev subdev;
+ struct v4l2_mbus_framefmt mbus_fmt;
+ struct v4l2_rect camif_crop;
+ struct media_pad pads[CAMIF_SD_PADS_NUM];
+ int stream_count;
+
+ struct cam_sensor {
+ struct v4l2_subdev *sd;
+ short power_count;
+ short stream_count;
+ } sensor;
+ struct media_pipeline *m_pipeline;
+
+ struct v4l2_ctrl_handler ctrl_handler;
+ struct v4l2_ctrl *test_pattern;
+
+ struct camif_vp vp[CAMIF_VP_NUM];
+ struct vb2_alloc_ctx *alloc_ctx;
+
+ const struct s3c_camif_variant *variant;
+ struct device *dev;
+ struct s3c_camif_plat_data pdata;
+ struct clk *clock[CLK_MAX_NUM];
+ struct mutex lock;
+ spinlock_t slock;
+ void __iomem *io_base;
+};
+
+/**
+ * struct camif_addr - Y/Cb/Cr DMA start address structure
+ * @y: luminance plane dma address
+ * @cb: Cb plane dma address
+ * @cr: Cr plane dma address
+ */
+struct camif_addr {
+ dma_addr_t y;
+ dma_addr_t cb;
+ dma_addr_t cr;
+};
+
+/**
+ * struct camif_buffer - the camif video buffer structure
+ * @vb: vb2 buffer
+ * @list: list head for the buffers queue
+ * @paddr: DMA start addresses
+ * @index: an identifier of this buffer at the DMA engine
+ */
+struct camif_buffer {
+ struct vb2_buffer vb;
+ struct list_head list;
+ struct camif_addr paddr;
+ unsigned int index;
+};
+
+const struct camif_fmt *s3c_camif_find_format(struct camif_vp *vp,
+ const u32 *pixelformat, int index);
+int s3c_camif_register_video_node(struct camif_dev *camif, int idx);
+void s3c_camif_unregister_video_node(struct camif_dev *camif, int idx);
+irqreturn_t s3c_camif_irq_handler(int irq, void *priv);
+int s3c_camif_create_subdev(struct camif_dev *camif);
+void s3c_camif_unregister_subdev(struct camif_dev *camif);
+int s3c_camif_set_defaults(struct camif_dev *camif);
+int s3c_camif_get_scaler_config(struct camif_vp *vp,
+ struct camif_scaler *scaler);
+
+static inline void camif_active_queue_add(struct camif_vp *vp,
+ struct camif_buffer *buf)
+{
+ list_add_tail(&buf->list, &vp->active_buf_q);
+ vp->active_buffers++;
+}
+
+static inline struct camif_buffer *camif_active_queue_pop(
+ struct camif_vp *vp)
+{
+ struct camif_buffer *buf = list_first_entry(&vp->active_buf_q,
+ struct camif_buffer, list);
+ list_del(&buf->list);
+ vp->active_buffers--;
+ return buf;
+}
+
+static inline struct camif_buffer *camif_active_queue_peek(
+ struct camif_vp *vp, int index)
+{
+ struct camif_buffer *tmp, *buf;
+
+ if (WARN_ON(list_empty(&vp->active_buf_q)))
+ return NULL;
+
+ list_for_each_entry_safe(buf, tmp, &vp->active_buf_q, list) {
+ if (buf->index == index) {
+ list_del(&buf->list);
+ vp->active_buffers--;
+ return buf;
+ }
+ }
+
+ return NULL;
+}
+
+static inline void camif_pending_queue_add(struct camif_vp *vp,
+ struct camif_buffer *buf)
+{
+ list_add_tail(&buf->list, &vp->pending_buf_q);
+}
+
+static inline struct camif_buffer *camif_pending_queue_pop(
+ struct camif_vp *vp)
+{
+ struct camif_buffer *buf = list_first_entry(&vp->pending_buf_q,
+ struct camif_buffer, list);
+ list_del(&buf->list);
+ return buf;
+}
+
+#endif /* CAMIF_CORE_H_ */
new file mode 100644
@@ -0,0 +1,579 @@
+/*
+ * Samsung s3c244x/s3c64xx SoC CAMIF driver
+ *
+ * Copyright (C) 2012 Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
+ * Copyright (C) 2012 Tomasz Figa <tomasz.figa@gmail.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.
+*/
+#define pr_fmt(fmt) "%s:%d " fmt, __func__, __LINE__
+
+#include <linux/delay.h>
+#include "camif-regs.h"
+
+#define camif_write(_camif, _off, _val) writel(_val, (_camif)->io_base + (_off))
+#define camif_read(_camif, _off) readl((_camif)->io_base + (_off))
+
+void camif_hw_reset(struct camif_dev *camif)
+{
+ u32 cfg;
+
+ cfg = camif_read(camif, S3C_CAMIF_REG_CISRCFMT);
+ cfg |= CISRCFMT_ITU601_8BIT;
+ camif_write(camif, S3C_CAMIF_REG_CISRCFMT, cfg);
+
+ /* S/W reset */
+ cfg = camif_read(camif, S3C_CAMIF_REG_CIGCTRL);
+ cfg |= CIGCTRL_SWRST;
+ if (camif->variant->ip_revision == S3C6410_CAMIF_IP_REV)
+ cfg |= CIGCTRL_IRQ_LEVEL;
+ camif_write(camif, S3C_CAMIF_REG_CIGCTRL, cfg);
+ udelay(10);
+
+ cfg = camif_read(camif, S3C_CAMIF_REG_CIGCTRL);
+ cfg &= ~CIGCTRL_SWRST;
+ camif_write(camif, S3C_CAMIF_REG_CIGCTRL, cfg);
+ udelay(10);
+}
+
+void camif_hw_clear_pending_irq(struct camif_vp *vp)
+{
+ u32 cfg = camif_read(vp->camif, S3C_CAMIF_REG_CIGCTRL);
+ cfg |= CIGCTRL_IRQ_CLR(vp->id);
+ camif_write(vp->camif, S3C_CAMIF_REG_CIGCTRL, cfg);
+}
+
+/*
+ * Sets video test pattern (off, color bar, horizontal or vertical gradient).
+ * External sensor pixel clock must be active for the test pattern to work.
+ */
+void camif_hw_set_test_pattern(struct camif_dev *camif, unsigned int pattern)
+{
+ u32 cfg = camif_read(camif, S3C_CAMIF_REG_CIGCTRL);
+ cfg &= ~CIGCTRL_TESTPATTERN_MASK;
+ cfg |= (pattern << 27);
+ camif_write(camif, S3C_CAMIF_REG_CIGCTRL, cfg);
+}
+
+static const u32 src_pixfmt_map[8][2] = {
+ { V4L2_MBUS_FMT_YUYV8_2X8, CISRCFMT_ORDER422_YCBYCR },
+ { V4L2_MBUS_FMT_YVYU8_2X8, CISRCFMT_ORDER422_YCRYCB },
+ { V4L2_MBUS_FMT_UYVY8_2X8, CISRCFMT_ORDER422_CBYCRY },
+ { V4L2_MBUS_FMT_VYUY8_2X8, CISRCFMT_ORDER422_CRYCBY },
+};
+
+/* Set camera input pixel format and resolution */
+void camif_hw_set_source_format(struct camif_dev *camif)
+{
+ struct v4l2_mbus_framefmt *mf = &camif->mbus_fmt;
+ unsigned int i = ARRAY_SIZE(src_pixfmt_map);
+ u32 cfg;
+
+ while (i-- >= 0) {
+ if (src_pixfmt_map[i][0] == mf->code)
+ break;
+ }
+
+ if (i == 0 && src_pixfmt_map[i][0] != mf->code) {
+ dev_err(camif->dev,
+ "Unsupported pixel code, falling back to %#08x\n",
+ src_pixfmt_map[i][0]);
+ }
+
+ cfg = camif_read(camif, S3C_CAMIF_REG_CISRCFMT);
+ cfg &= ~(CISRCFMT_ORDER422_MASK | CISRCFMT_SIZE_CAM_MASK);
+ cfg |= (mf->width << 16) | mf->height;
+ cfg |= src_pixfmt_map[i][1];
+ camif_write(camif, S3C_CAMIF_REG_CISRCFMT, cfg);
+}
+
+/* Set the camera host input window offsets (cropping) */
+void camif_hw_set_camera_crop(struct camif_dev *camif)
+{
+ struct v4l2_mbus_framefmt *mf = &camif->mbus_fmt;
+ struct v4l2_rect *crop = &camif->camif_crop;
+ u32 hoff2, voff2;
+ u32 cfg;
+
+ /* Note: s3c244x requirement: left = f_width - rect.width / 2 */
+ cfg = camif_read(camif, S3C_CAMIF_REG_CIWDOFST);
+ cfg &= ~(CIWDOFST_OFST_MASK | CIWDOFST_WINOFSEN);
+ cfg |= (crop->left << 16) | crop->top;
+ if (crop->left != 0 || crop->top != 0)
+ cfg |= CIWDOFST_WINOFSEN;
+ camif_write(camif, S3C_CAMIF_REG_CIWDOFST, cfg);
+
+ if (camif->variant->ip_revision == S3C6410_CAMIF_IP_REV) {
+ hoff2 = mf->width - crop->width - crop->left;
+ voff2 = mf->height - crop->height - crop->top;
+ cfg = (hoff2 << 16) | voff2;
+ camif_write(camif, S3C_CAMIF_REG_CIWDOFST2, cfg);
+ }
+}
+
+void camif_hw_clear_fifo_overflow(struct camif_vp *vp)
+{
+ struct camif_dev *camif = vp->camif;
+ u32 cfg;
+
+ cfg = camif_read(camif, S3C_CAMIF_REG_CIWDOFST);
+ if (vp->id == 0)
+ cfg |= (CIWDOFST_CLROVCOFIY | CIWDOFST_CLROVCOFICB |
+ CIWDOFST_CLROVCOFICR);
+ else
+ cfg |= (/* CIWDOFST_CLROVPRFIY | */ CIWDOFST_CLROVPRFICB |
+ CIWDOFST_CLROVPRFICR);
+ camif_write(camif, S3C_CAMIF_REG_CIWDOFST, cfg);
+}
+
+/* Set video bus signals polarity */
+void camif_hw_set_camera_bus(struct camif_dev *camif)
+{
+ unsigned int flags = camif->pdata.sensor.flags;
+
+ u32 cfg = camif_read(camif, S3C_CAMIF_REG_CIGCTRL);
+
+ cfg &= ~(CIGCTRL_INVPOLPCLK | CIGCTRL_INVPOLVSYNC |
+ CIGCTRL_INVPOLHREF | CIGCTRL_INVPOLFIELD);
+
+ if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
+ cfg |= CIGCTRL_INVPOLPCLK;
+
+ if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
+ cfg |= CIGCTRL_INVPOLVSYNC;
+ /*
+ * HREF is normally high during frame active data
+ * transmission and low during horizontal synchronization
+ * period. Thus HREF active high means HSYNC active low.
+ */
+ if (flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH)
+ cfg |= CIGCTRL_INVPOLHREF; /* HREF active low */
+
+ if (camif->variant->ip_revision == S3C6410_CAMIF_IP_REV) {
+ if (flags & V4L2_MBUS_FIELD_EVEN_LOW)
+ cfg |= CIGCTRL_INVPOLFIELD;
+ cfg |= CIGCTRL_FIELDMODE;
+ }
+
+ pr_debug("Setting CIGCTRL to: %#x\n", cfg);
+
+ camif_write(camif, S3C_CAMIF_REG_CIGCTRL, cfg);
+}
+
+void camif_hw_set_output_addr(struct camif_vp *vp,
+ struct camif_addr *paddr, int i)
+{
+ struct camif_dev *camif = vp->camif;
+
+ camif_write(camif, S3C_CAMIF_REG_CIYSA(vp->id, i), paddr->y);
+ if (camif->variant->ip_revision == S3C6410_CAMIF_IP_REV
+ || vp->id == VP_CODEC) {
+ camif_write(camif, S3C_CAMIF_REG_CICBSA(vp->id, i),
+ paddr->cb);
+ camif_write(camif, S3C_CAMIF_REG_CICRSA(vp->id, i),
+ paddr->cr);
+ }
+
+ pr_debug("dst_buf[%d]: %#X, cb: %#X, cr: %#X\n",
+ i, paddr->y, paddr->cb, paddr->cr);
+}
+
+static void camif_hw_set_out_dma_size(struct camif_vp *vp)
+{
+ struct camif_frame *frame = &vp->out_frame;
+ u32 cfg;
+
+ cfg = camif_read(vp->camif, S3C_CAMIF_REG_CITRGFMT(vp->id, vp->offset));
+ cfg &= ~CITRGFMT_TARGETSIZE_MASK;
+ cfg |= (frame->f_width << 16) | frame->f_height;
+ camif_write(vp->camif, S3C_CAMIF_REG_CITRGFMT(vp->id, vp->offset), cfg);
+}
+
+static void camif_get_dma_burst(u32 width, u32 ybpp, u32 *mburst, u32 *rburst)
+{
+ unsigned int nwords = width * ybpp / 4;
+ unsigned int div, rem;
+
+ if (WARN_ON(width < 8 || (width * ybpp) & 7))
+ return;
+
+ for (div = 16; div >= 2; div /= 2) {
+ if (nwords < div)
+ continue;
+
+ rem = nwords & (div - 1);
+ if (rem == 0) {
+ *mburst = div;
+ *rburst = div;
+ break;
+ }
+ if (rem == div / 2 || rem == div / 4) {
+ *mburst = div;
+ *rburst = rem;
+ break;
+ }
+ }
+}
+
+void camif_hw_set_output_dma(struct camif_vp *vp)
+{
+ struct camif_dev *camif = vp->camif;
+ struct camif_frame *frame = &vp->out_frame;
+ const struct camif_fmt *fmt = vp->out_fmt;
+ unsigned int ymburst = 0, yrburst = 0;
+ u32 cfg;
+
+ camif_hw_set_out_dma_size(vp);
+
+ if (camif->variant->ip_revision == S3C6410_CAMIF_IP_REV) {
+ struct camif_dma_offset *offset = &frame->dma_offset;
+ /* Set the input dma offsets. */
+ cfg = S3C_CISS_OFFS_INITIAL(offset->initial);
+ cfg |= S3C_CISS_OFFS_LINE(offset->line);
+ camif_write(camif, S3C_CAMIF_REG_CISSY(vp->id), cfg);
+ camif_write(camif, S3C_CAMIF_REG_CISSCB(vp->id), cfg);
+ camif_write(camif, S3C_CAMIF_REG_CISSCR(vp->id), cfg);
+ }
+
+ /* Configure DMA burst values */
+ camif_get_dma_burst(frame->rect.width, fmt->ybpp, &ymburst, &yrburst);
+
+ cfg = camif_read(camif, S3C_CAMIF_REG_CICTRL(vp->id, vp->offset));
+ cfg &= ~CICTRL_BURST_MASK;
+
+ cfg |= CICTRL_YBURST1(ymburst) | CICTRL_YBURST2(yrburst);
+ cfg |= CICTRL_CBURST1(ymburst / 2) | CICTRL_CBURST2(yrburst / 2);
+
+ camif_write(camif, S3C_CAMIF_REG_CICTRL(vp->id, vp->offset), cfg);
+
+ pr_debug("ymburst: %u, yrburst: %u\n", ymburst, yrburst);
+}
+
+void camif_hw_set_input_path(struct camif_vp *vp)
+{
+ u32 cfg = camif_read(vp->camif, S3C_CAMIF_REG_MSCTRL(vp->id));
+ cfg &= ~MSCTRL_SEL_DMA_CAM;
+ camif_write(vp->camif, S3C_CAMIF_REG_MSCTRL(vp->id), cfg);
+}
+
+void camif_hw_set_target_format(struct camif_vp *vp)
+{
+ struct camif_dev *camif = vp->camif;
+ struct camif_frame *frame = &vp->out_frame;
+ u32 cfg;
+
+ pr_debug("fw: %d, fh: %d color: %d\n", frame->f_width,
+ frame->f_height, vp->out_fmt->color);
+
+ cfg = camif_read(camif, S3C_CAMIF_REG_CITRGFMT(vp->id, vp->offset));
+ cfg &= ~CITRGFMT_TARGETSIZE_MASK;
+
+ if (camif->variant->ip_revision == S3C244X_CAMIF_IP_REV) {
+ /* We currently support only YCbCr 4:2:2 at the camera input */
+ cfg |= CITRGFMT_IN422;
+ cfg &= ~CITRGFMT_OUT422;
+ if (vp->out_fmt->color == IMG_FMT_YCBCR422P)
+ cfg |= CITRGFMT_OUT422;
+ } else {
+ cfg &= ~CITRGFMT_OUTFORMAT_MASK;
+ switch (vp->out_fmt->color) {
+ case IMG_FMT_RGB565...IMG_FMT_XRGB8888:
+ cfg |= CITRGFMT_OUTFORMAT_RGB;
+ break;
+ case IMG_FMT_YCBCR420...IMG_FMT_YCRCB420:
+ cfg |= CITRGFMT_OUTFORMAT_YCBCR420;
+ break;
+ case IMG_FMT_YCBCR422P:
+ cfg |= CITRGFMT_OUTFORMAT_YCBCR422;
+ break;
+ case IMG_FMT_YCBYCR422...IMG_FMT_CRYCBY422:
+ cfg |= CITRGFMT_OUTFORMAT_YCBCR422I;
+ break;
+ }
+ }
+
+ /* Rotation is only supported by s3c64xx */
+ if (vp->rotation == 90 || vp->rotation == 270)
+ cfg |= (frame->f_height << 16) | frame->f_width;
+ else
+ cfg |= (frame->f_width << 16) | frame->f_height;
+ camif_write(camif, S3C_CAMIF_REG_CITRGFMT(vp->id, vp->offset), cfg);
+
+ /* Target area, output pixel width * height */
+ cfg = camif_read(camif, S3C_CAMIF_REG_CITAREA(vp->id, vp->offset));
+ cfg &= ~CITAREA_MASK;
+ cfg |= (frame->f_width * frame->f_height);
+ camif_write(camif, S3C_CAMIF_REG_CITAREA(vp->id, vp->offset), cfg);
+}
+
+void camif_hw_set_flip(struct camif_vp *vp)
+{
+ u32 cfg = camif_read(vp->camif,
+ S3C_CAMIF_REG_CITRGFMT(vp->id, vp->offset));
+
+ cfg &= ~CITRGFMT_FLIP_MASK;
+
+ if (vp->hflip)
+ cfg |= CITRGFMT_FLIP_Y_MIRROR;
+ if (vp->vflip)
+ cfg |= CITRGFMT_FLIP_X_MIRROR;
+
+ camif_write(vp->camif, S3C_CAMIF_REG_CITRGFMT(vp->id, vp->offset), cfg);
+}
+
+static void camif_hw_set_prescaler(struct camif_vp *vp)
+{
+ struct camif_dev *camif = vp->camif;
+ struct camif_scaler *sc = &vp->scaler;
+ u32 cfg, shfactor, addr;
+
+ addr = S3C_CAMIF_REG_CISCPRERATIO(vp->id, vp->offset);
+
+ shfactor = 10 - (sc->h_shift + sc->v_shift);
+ cfg = shfactor << 28;
+
+ cfg |= (sc->pre_h_ratio << 16) | sc->pre_v_ratio;
+ camif_write(camif, addr, cfg);
+
+ cfg = (sc->pre_dst_width << 16) | sc->pre_dst_height;
+ camif_write(camif, S3C_CAMIF_REG_CISCPREDST(vp->id, vp->offset), cfg);
+}
+
+void camif_s3c244x_hw_set_scaler(struct camif_vp *vp)
+{
+ struct camif_dev *camif = vp->camif;
+ struct camif_scaler *scaler = &vp->scaler;
+ unsigned int color = vp->out_fmt->color;
+ u32 cfg;
+
+ camif_hw_set_prescaler(vp);
+
+ cfg = camif_read(camif, S3C_CAMIF_REG_CISCCTRL(vp->id, vp->offset));
+
+ cfg &= ~(CISCCTRL_SCALEUP_MASK | CISCCTRL_SCALERBYPASS |
+ CISCCTRL_MAIN_RATIO_MASK | CIPRSCCTRL_RGB_FORMAT_24BIT);
+
+ if (scaler->enable) {
+ if (scaler->scaleup_h) {
+ if (vp->id == VP_CODEC)
+ cfg |= CISCCTRL_SCALEUP_H;
+ else
+ cfg |= CIPRSCCTRL_SCALEUP_H;
+ }
+ if (scaler->scaleup_v) {
+ if (vp->id == VP_CODEC)
+ cfg |= CISCCTRL_SCALEUP_V;
+ else
+ cfg |= CIPRSCCTRL_SCALEUP_V;
+ }
+ } else {
+ if (vp->id == VP_CODEC)
+ cfg |= CISCCTRL_SCALERBYPASS;
+ }
+
+ cfg |= ((scaler->main_h_ratio & 0x1ff) << 16);
+ cfg |= scaler->main_v_ratio & 0x1ff;
+
+ if (vp->id == VP_PREVIEW) {
+ if (color == IMG_FMT_XRGB8888)
+ cfg |= CIPRSCCTRL_RGB_FORMAT_24BIT;
+ cfg |= CIPRSCCTRL_SAMPLE;
+ }
+
+ camif_write(camif, S3C_CAMIF_REG_CISCCTRL(vp->id, vp->offset), cfg);
+
+ pr_debug("main: h_ratio: %#x, v_ratio: %#x",
+ scaler->main_h_ratio, scaler->main_v_ratio);
+}
+
+void camif_s3c64xx_hw_set_scaler(struct camif_vp *vp)
+{
+ struct camif_dev *camif = vp->camif;
+ struct camif_scaler *scaler = &vp->scaler;
+ unsigned int color = vp->out_fmt->color;
+ u32 cfg;
+
+ camif_hw_set_prescaler(vp);
+
+ cfg = camif_read(camif, S3C_CAMIF_REG_CISCCTRL(vp->id, vp->offset));
+
+ cfg &= ~(CISCCTRL_CSCR2Y_WIDE | CISCCTRL_CSCY2R_WIDE
+ | CISCCTRL_SCALEUP_H | CISCCTRL_SCALEUP_V
+ | CISCCTRL_SCALERBYPASS | CISCCTRL_ONE2ONE
+ | CISCCTRL_INRGB_FMT_MASK | CISCCTRL_OUTRGB_FMT_MASK
+ | CISCCTRL_INTERLACE | CISCCTRL_EXTRGB_EXTENSION
+ | CISCCTRL_MAIN_RATIO_MASK);
+
+ cfg |= (CISCCTRL_CSCR2Y_WIDE | CISCCTRL_CSCY2R_WIDE);
+
+ if (!scaler->enable) {
+ cfg |= CISCCTRL_SCALERBYPASS;
+ } else {
+ if (scaler->scaleup_h)
+ cfg |= CISCCTRL_SCALEUP_H;
+ if (scaler->scaleup_v)
+ cfg |= CISCCTRL_SCALEUP_V;
+ if (scaler->copy)
+ cfg |= CISCCTRL_ONE2ONE;
+ }
+
+ switch (color) {
+ case IMG_FMT_RGB666:
+ cfg |= CISCCTRL_OUTRGB_FMT_RGB666;
+ break;
+ case IMG_FMT_XRGB8888:
+ cfg |= CISCCTRL_OUTRGB_FMT_RGB888;
+ break;
+ }
+
+ cfg |= (scaler->main_h_ratio & 0x1ff) << 16;
+ cfg |= scaler->main_v_ratio & 0x1ff;
+
+ camif_write(camif, S3C_CAMIF_REG_CISCCTRL(vp->id, vp->offset), cfg);
+
+ pr_debug("main: h_ratio: %#x, v_ratio: %#x",
+ scaler->main_h_ratio, scaler->main_v_ratio);
+}
+
+void camif_hw_set_scaler(struct camif_vp *vp)
+{
+ unsigned int ip_rev = vp->camif->variant->ip_revision;
+
+ if (ip_rev == S3C244X_CAMIF_IP_REV)
+ camif_s3c244x_hw_set_scaler(vp);
+ else
+ camif_s3c64xx_hw_set_scaler(vp);
+}
+
+void camif_hw_enable_scaler(struct camif_vp *vp, bool on)
+{
+ u32 addr = S3C_CAMIF_REG_CISCCTRL(vp->id, vp->offset);
+ u32 cfg;
+
+ cfg = camif_read(vp->camif, addr);
+ if (on)
+ cfg |= CISCCTRL_SCALERSTART;
+ else
+ cfg &= ~CISCCTRL_SCALERSTART;
+ camif_write(vp->camif, addr, cfg);
+}
+
+void camif_hw_set_lastirq(struct camif_vp *vp, int enable)
+{
+ u32 addr = S3C_CAMIF_REG_CICTRL(vp->id, vp->offset);
+ u32 cfg;
+
+ cfg = camif_read(vp->camif, addr);
+ if (enable)
+ cfg |= CICTRL_LASTIRQ_ENABLE;
+ else
+ cfg &= ~CICTRL_LASTIRQ_ENABLE;
+ camif_write(vp->camif, addr, cfg);
+}
+
+void camif_hw_set_effect(struct camif_vp *vp, bool active)
+{
+ u32 cfg = 0;
+
+ if (active) {
+ /* TODO: effects support on 64xx */
+ }
+
+ camif_write(vp->camif, S3C_CAMIF_REG_CIIMGEFF, cfg);
+}
+
+void camif_hw_enable_capture(struct camif_vp *vp)
+{
+ struct camif_dev *camif = vp->camif;
+ u32 cfg;
+
+ cfg = camif_read(camif, S3C_CAMIF_REG_CIIMGCPT(vp->offset));
+ camif->stream_count++;
+
+ if (camif->variant->ip_revision == S3C6410_CAMIF_IP_REV)
+ cfg |= CIIMGCPT_CPT_FREN_ENABLE(vp->id);
+
+ if (vp->scaler.enable)
+ cfg |= CIIMGCPT_IMGCPTEN_SC(vp->id);
+
+ if (camif->stream_count == 1)
+ cfg |= CIIMGCPT_IMGCPTEN;
+
+ camif_write(camif, S3C_CAMIF_REG_CIIMGCPT(vp->offset), cfg);
+
+ pr_debug("CIIMGCPT: %#x, camif->stream_count: %d\n",
+ cfg, camif->stream_count);
+}
+
+void camif_hw_disable_capture(struct camif_vp *vp)
+{
+ struct camif_dev *camif = vp->camif;
+ u32 cfg;
+
+ cfg = camif_read(camif, S3C_CAMIF_REG_CIIMGCPT(vp->offset));
+ cfg &= ~CIIMGCPT_IMGCPTEN_SC(vp->id);
+
+ if (WARN_ON(--(camif->stream_count) < 0))
+ camif->stream_count = 0;
+
+ if (camif->stream_count == 0)
+ cfg &= ~CIIMGCPT_IMGCPTEN;
+
+ pr_debug("CIIMGCPT: %#x, camif->stream_count: %d\n",
+ cfg, camif->stream_count);
+
+ camif_write(camif, S3C_CAMIF_REG_CIIMGCPT(vp->offset), cfg);
+}
+
+void camif_hw_dump_regs(struct camif_dev *camif, const char *label)
+{
+ struct {
+ u32 offset;
+ const char * const name;
+ } registers[] = {
+ { S3C_CAMIF_REG_CISRCFMT, "CISRCFMT" },
+ { S3C_CAMIF_REG_CIWDOFST, "CIWDOFST" },
+ { S3C_CAMIF_REG_CIGCTRL, "CIGCTRL" },
+ { S3C_CAMIF_REG_CIWDOFST2, "CIWDOFST2" },
+ { S3C_CAMIF_REG_CIYSA(0, 0), "CICOYSA0" },
+ { S3C_CAMIF_REG_CICBSA(0, 0), "CICOCBSA0" },
+ { S3C_CAMIF_REG_CICRSA(0, 0), "CICOCRSA0" },
+ { S3C_CAMIF_REG_CIYSA(0, 1), "CICOYSA1" },
+ { S3C_CAMIF_REG_CICBSA(0, 1), "CICOCBSA1" },
+ { S3C_CAMIF_REG_CICRSA(0, 1), "CICOCRSA1" },
+ { S3C_CAMIF_REG_CIYSA(0, 2), "CICOYSA2" },
+ { S3C_CAMIF_REG_CICBSA(0, 2), "CICOCBSA2" },
+ { S3C_CAMIF_REG_CICRSA(0, 2), "CICOCRSA2" },
+ { S3C_CAMIF_REG_CIYSA(0, 3), "CICOYSA3" },
+ { S3C_CAMIF_REG_CICBSA(0, 3), "CICOCBSA3" },
+ { S3C_CAMIF_REG_CICRSA(0, 3), "CICOCRSA3" },
+ { S3C_CAMIF_REG_CIYSA(1, 0), "CIPRYSA0" },
+ { S3C_CAMIF_REG_CIYSA(1, 1), "CIPRYSA1" },
+ { S3C_CAMIF_REG_CIYSA(1, 2), "CIPRYSA2" },
+ { S3C_CAMIF_REG_CIYSA(1, 3), "CIPRYSA3" },
+ { S3C_CAMIF_REG_CITRGFMT(0, 0), "CICOTRGFMT" },
+ { S3C_CAMIF_REG_CITRGFMT(1, 0), "CIPRTRGFMT" },
+ { S3C_CAMIF_REG_CICTRL(0, 0), "CICOCTRL" },
+ { S3C_CAMIF_REG_CICTRL(1, 0), "CIPRCTRL" },
+ { S3C_CAMIF_REG_CISCPREDST(0, 0), "CICOSCPREDST" },
+ { S3C_CAMIF_REG_CISCPREDST(1, 0), "CIPRSCPREDST" },
+ { S3C_CAMIF_REG_CISCPRERATIO(0, 0), "CICOSCPRERATIO" },
+ { S3C_CAMIF_REG_CISCPRERATIO(1, 0), "CIPRSCPRERATIO" },
+ { S3C_CAMIF_REG_CISCCTRL(0, 0), "CICOSCCTRL" },
+ { S3C_CAMIF_REG_CISCCTRL(1, 0), "CIPRSCCTRL" },
+ { S3C_CAMIF_REG_CITAREA(0, 0), "CICOTAREA" },
+ { S3C_CAMIF_REG_CITAREA(1, 0), "CIPRTAREA" },
+ { S3C_CAMIF_REG_CISTATUS(0, 0), "CICOSTATUS" },
+ { S3C_CAMIF_REG_CISTATUS(1, 0), "CIPRSTATUS" },
+ { S3C_CAMIF_REG_CIIMGCPT(0), "CIIMGCPT" },
+ };
+ u32 i;
+
+ pr_info("--- %s ---\n", label);
+ for (i = 0; i < ARRAY_SIZE(registers); i++) {
+ u32 cfg = readl(camif->io_base + registers[i].offset);
+ printk(KERN_INFO "%s:\t0x%08x\n", registers[i].name, cfg);
+ }
+}
new file mode 100644
@@ -0,0 +1,267 @@
+/*
+ * Register definition file for s3c244x/s3c64xx SoC CAMIF driver
+ *
+ * Copyright (C) 2012 Sylwester Nawrocki <sylvester.nawrocki@gmail.com>
+ * Copyright (C) 2012 Tomasz Figa <tomasz.figa@gmail.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 CAMIF_REGS_H_
+#define CAMIF_REGS_H_
+
+#include "camif-core.h"
+#include <media/s3c_camif.h>
+
+/*
+ * The id argument indicates the processing path:
+ * id = 0 - codec (FIMC C), 1 - preview (FIMC P).
+ */
+
+/* Camera input format */
+#define S3C_CAMIF_REG_CISRCFMT 0x00
+#define CISRCFMT_ITU601_8BIT (1 << 31)
+#define CISRCFMT_ITU656_8BIT (0 << 31)
+#define CISRCFMT_ORDER422_YCBYCR (0 << 14)
+#define CISRCFMT_ORDER422_YCRYCB (1 << 14)
+#define CISRCFMT_ORDER422_CBYCRY (2 << 14)
+#define CISRCFMT_ORDER422_CRYCBY (3 << 14)
+#define CISRCFMT_ORDER422_MASK (3 << 14)
+#define CISRCFMT_SIZE_CAM_MASK (0x1fff << 16 | 0x1fff)
+
+/* Window offset */
+#define S3C_CAMIF_REG_CIWDOFST 0x04
+#define CIWDOFST_WINOFSEN (1 << 31)
+#define CIWDOFST_CLROVCOFIY (1 << 30)
+#define CIWDOFST_CLROVRLB_PR (1 << 28)
+/* #define CIWDOFST_CLROVPRFIY (1 << 27) */
+#define CIWDOFST_CLROVCOFICB (1 << 15)
+#define CIWDOFST_CLROVCOFICR (1 << 14)
+#define CIWDOFST_CLROVPRFICB (1 << 13)
+#define CIWDOFST_CLROVPRFICR (1 << 12)
+#define CIWDOFST_OFST_MASK (0x7ff << 16 | 0x7ff)
+
+/* Window offset 2 */
+#define S3C_CAMIF_REG_CIWDOFST2 0x14
+#define CIWDOFST2_OFST2_MASK (0xfff << 16 | 0xfff)
+
+/* Global control */
+#define S3C_CAMIF_REG_CIGCTRL 0x08
+#define CIGCTRL_SWRST (1 << 31)
+#define CIGCTRL_CAMRST (1 << 30)
+#define CIGCTRL_TESTPATTERN_NORMAL (0 << 27)
+#define CIGCTRL_TESTPATTERN_COLOR_BAR (1 << 27)
+#define CIGCTRL_TESTPATTERN_HOR_INC (2 << 27)
+#define CIGCTRL_TESTPATTERN_VER_INC (3 << 27)
+#define CIGCTRL_TESTPATTERN_MASK (3 << 27)
+#define CIGCTRL_INVPOLPCLK (1 << 26)
+#define CIGCTRL_INVPOLVSYNC (1 << 25)
+#define CIGCTRL_INVPOLHREF (1 << 24)
+#define CIGCTRL_IRQ_OVFEN (1 << 22)
+#define CIGCTRL_HREF_MASK (1 << 21)
+#define CIGCTRL_IRQ_LEVEL (1 << 20)
+/* IRQ_CLR_C, IRQ_CLR_P */
+#define CIGCTRL_IRQ_CLR(id) (1 << (19 - (id)))
+#define CIGCTRL_FIELDMODE (1 << 2)
+#define CIGCTRL_INVPOLFIELD (1 << 1)
+#define CIGCTRL_CAM_INTERLACE (1 << 0)
+
+/* Y DMA output frame start address. n = 0..3. */
+#define S3C_CAMIF_REG_CIYSA(id, n) (0x18 + (id) * 0x54 + (n) * 4)
+/* Cb plane output DMA start address. n = 0..3. Only codec path. */
+#define S3C_CAMIF_REG_CICBSA(id, n) (0x28 + (id) * 0x54 + (n) * 4)
+/* Cr plane output DMA start address. n = 0..3. Only codec path. */
+#define S3C_CAMIF_REG_CICRSA(id, n) (0x38 + (id) * 0x54 + (n) * 4)
+
+/* CICOTRGFMT, CIPRTRGFMT - Target format */
+#define S3C_CAMIF_REG_CITRGFMT(id, _offs) (0x48 + (id) * (0x34 + (_offs)))
+#define CITRGFMT_IN422 (1 << 31) /* only for s3c24xx */
+#define CITRGFMT_OUT422 (1 << 30) /* only for s3c24xx */
+#define CITRGFMT_OUTFORMAT_YCBCR420 (0 << 29) /* only for s3c6410 */
+#define CITRGFMT_OUTFORMAT_YCBCR422 (1 << 29) /* only for s3c6410 */
+#define CITRGFMT_OUTFORMAT_YCBCR422I (2 << 29) /* only for s3c6410 */
+#define CITRGFMT_OUTFORMAT_RGB (3 << 29) /* only for s3c6410 */
+#define CITRGFMT_OUTFORMAT_MASK (3 << 29) /* only for s3c6410 */
+#define CITRGFMT_TARGETHSIZE(x) ((x) << 16)
+#define CITRGFMT_FLIP_NORMAL (0 << 14)
+#define CITRGFMT_FLIP_X_MIRROR (1 << 14)
+#define CITRGFMT_FLIP_Y_MIRROR (2 << 14)
+#define CITRGFMT_FLIP_180 (3 << 14)
+#define CITRGFMT_FLIP_MASK (3 << 14)
+/* Preview path only */
+#define CITRGFMT_ROT90_PR (1 << 13)
+#define CITRGFMT_TARGETVSIZE(x) ((x) << 0)
+#define CITRGFMT_TARGETSIZE_MASK ((0x1fff << 16) | 0x1fff)
+
+/* CICOCTRL, CIPRCTRL. Output DMA control. */
+#define S3C_CAMIF_REG_CICTRL(id, _offs) (0x4c + (id) * (0x34 + (_offs)))
+#define CICTRL_BURST_MASK (0xfffff << 4)
+/* xBURSTn - 5-bits width */
+#define CICTRL_YBURST1(x) ((x) << 19)
+#define CICTRL_YBURST2(x) ((x) << 14)
+#define CICTRL_RGBBURST1(x) ((x) << 19)
+#define CICTRL_RGBBURST2(x) ((x) << 14)
+#define CICTRL_CBURST1(x) ((x) << 9)
+#define CICTRL_CBURST2(x) ((x) << 4)
+#define CICTRL_LASTIRQ_ENABLE (1 << 2)
+#define CICTRL_ORDER422_MASK (3 << 0)
+
+/* CICOSCPRERATIO, CIPRSCPRERATIO. Pre-scaler control 1. */
+#define S3C_CAMIF_REG_CISCPRERATIO(id, _offs) (0x50 + (id) * (0x34 + (_offs)))
+
+/* CICOSCPREDST, CIPRSCPREDST. Pre-scaler control 2. */
+#define S3C_CAMIF_REG_CISCPREDST(id, _offs) (0x54 + (id) * (0x34 + (_offs)))
+
+/* CICOSCCTRL, CIPRSCCTRL. Main scaler control. */
+#define S3C_CAMIF_REG_CISCCTRL(id, _offs) (0x58 + (id) * (0x34 + (_offs)))
+#define CISCCTRL_SCALERBYPASS (1 << 31)
+/* s3c244x preview path only, s3c64xx both */
+#define CIPRSCCTRL_SAMPLE (1 << 31)
+/* 0 - 16-bit RGB, 1 - 24-bit RGB */
+#define CIPRSCCTRL_RGB_FORMAT_24BIT (1 << 30) /* only for s3c244x */
+#define CIPRSCCTRL_SCALEUP_H (1 << 29) /* only for s3c244x */
+#define CIPRSCCTRL_SCALEUP_V (1 << 28) /* only for s3c244x */
+/* s3c64xx */
+#define CISCCTRL_SCALEUP_H (1 << 30)
+#define CISCCTRL_SCALEUP_V (1 << 29)
+#define CISCCTRL_SCALEUP_MASK (0x3 << 29)
+#define CISCCTRL_CSCR2Y_WIDE (1 << 28)
+#define CISCCTRL_CSCY2R_WIDE (1 << 27)
+#define CISCCTRL_LCDPATHEN_FIFO (1 << 26)
+#define CISCCTRL_INTERLACE (1 << 25)
+#define CISCCTRL_SCALERSTART (1 << 15)
+#define CISCCTRL_INRGB_FMT_RGB565 (0 << 13)
+#define CISCCTRL_INRGB_FMT_RGB666 (1 << 13)
+#define CISCCTRL_INRGB_FMT_RGB888 (2 << 13)
+#define CISCCTRL_INRGB_FMT_MASK (3 << 13)
+#define CISCCTRL_OUTRGB_FMT_RGB565 (0 << 11)
+#define CISCCTRL_OUTRGB_FMT_RGB666 (1 << 11)
+#define CISCCTRL_OUTRGB_FMT_RGB888 (2 << 11)
+#define CISCCTRL_OUTRGB_FMT_MASK (3 << 11)
+#define CISCCTRL_EXTRGB_EXTENSION (1 << 10)
+#define CISCCTRL_ONE2ONE (1 << 9)
+#define CISCCTRL_MAIN_RATIO_MASK (0x1ff << 16 | 0x1ff)
+
+/* CICOTAREA, CIPRTAREA. Target area for DMA (Hsize x Vsize). */
+#define S3C_CAMIF_REG_CITAREA(id, _offs) (0x5c + (id) * (0x34 + (_offs)))
+#define CITAREA_MASK 0xfffffff
+
+/* Codec (id = 0) or preview (id = 1) path status. */
+#define S3C_CAMIF_REG_CISTATUS(id, _offs) (0x64 + (id) * (0x34 + (_offs)))
+#define CISTATUS_OVFIY_STATUS (1 << 31)
+#define CISTATUS_OVFICB_STATUS (1 << 30)
+#define CISTATUS_OVFICR_STATUS (1 << 29)
+#define CISTATUS_OVF_MASK (0x7 << 29)
+#define CIPRSTATUS_OVF_MASK (0x3 << 30)
+#define CISTATUS_VSYNC_STATUS (1 << 28)
+#define CISTATUS_FRAMECNT_MASK (3 << 26)
+#define CISTATUS_FRAMECNT(__reg) (((__reg) >> 26) & 0x3)
+#define CISTATUS_WINOFSTEN_STATUS (1 << 25)
+#define CISTATUS_IMGCPTEN_STATUS (1 << 22)
+#define CISTATUS_IMGCPTENSC_STATUS (1 << 21)
+#define CISTATUS_VSYNC_A_STATUS (1 << 20)
+#define CISTATUS_FRAMEEND_STATUS (1 << 19) /* 17 on s3c64xx */
+
+/* Image capture enable */
+#define S3C_CAMIF_REG_CIIMGCPT(_offs) (0xa0 + (_offs))
+#define CIIMGCPT_IMGCPTEN (1 << 31)
+#define CIIMGCPT_IMGCPTEN_SC(id) (1 << (30 - (id)))
+/* Frame control: 1 - one-shot, 0 - free run */
+#define CIIMGCPT_CPT_FREN_ENABLE(id) (1 << (25 - (id)))
+#define CIIMGCPT_CPT_FRMOD_ENABLE (0 << 18)
+#define CIIMGCPT_CPT_FRMOD_CNT (1 << 18)
+
+/* Capture sequence */
+#define S3C_CAMIF_REG_CICPTSEQ 0xc4
+
+/* Image effects */
+#define S3C_CAMIF_REG_CIIMGEFF 0xd0
+#define CIIMGEFF_IE_ENABLE(id) (1 << (30 + (id)))
+/* Image effect: 1 - after scaler, 0 - before scaler */
+#define CIIMGEFF_IE_AFTER_SC (1 << 29)
+#define CIIMGEFF_FIN_MASK (7 << 26)
+#define CIIMGEFF_FIN_BYPASS (0 << 26)
+#define CIIMGEFF_FIN_ARBITRARY (1 << 26)
+#define CIIMGEFF_FIN_NEGATIVE (2 << 26)
+#define CIIMGEFF_FIN_ARTFREEZE (3 << 26)
+#define CIIMGEFF_FIN_EMBOSSING (4 << 26)
+#define CIIMGEFF_FIN_SILHOUETTE (5 << 26)
+#define CIIMGEFF_PAT_CBCR_MASK ((0xff << 13) | 0xff)
+#define CIIMGEFF_PAT_CB(x) ((x) << 13)
+#define CIIMGEFF_PAT_CR(x) (x)
+
+/* MSCOY0SA, MSPRY0SA. Y/Cb/Cr frame start address for input DMA. */
+#define S3C_CAMIF_REG_MSY0SA(id) (0xd4 + ((id) * 0x2c))
+#define S3C_CAMIF_REG_MSCB0SA(id) (0xd8 + ((id) * 0x2c))
+#define S3C_CAMIF_REG_MSCR0SA(id) (0xdc + ((id) * 0x2c))
+
+/* MSCOY0END, MSCOY0END. Y/Cb/Cr frame end address for input DMA. */
+#define S3C_CAMIF_REG_MSY0END(id) (0xe0 + ((id) * 0x2c))
+#define S3C_CAMIF_REG_MSCB0END(id) (0xe4 + ((id) * 0x2c))
+#define S3C_CAMIF_REG_MSCR0END(id) (0xe8 + ((id) * 0x2c))
+
+/* MSPRYOFF, MSPRYOFF. Y/Cb/Cr offset. n: 0 - codec, 1 - preview. */
+#define S3C_CAMIF_REG_MSYOFF(id) (0x118 + ((id) * 0x2c))
+#define S3C_CAMIF_REG_MSCBOFF(id) (0x11c + ((id) * 0x2c))
+#define S3C_CAMIF_REG_MSCROFF(id) (0x120 + ((id) * 0x2c))
+
+/* Real input DMA data size. n = 0 - codec, 1 - preview. */
+#define S3C_CAMIF_REG_MSWIDTH(id) (0xf8 + (id) * 0x2c)
+#define AUTOLOAD_ENABLE (1 << 31)
+#define ADDR_CH_DIS (1 << 30)
+#define MSHEIGHT(x) (((x) & 0x3ff) << 16)
+#define MSWIDTH(x) ((x) & 0x3ff)
+
+/* Input DMA control. n = 0 - codec, 1 - preview */
+#define S3C_CAMIF_REG_MSCTRL(id) (0xfc + (id) * 0x2c)
+#define MSCTRL_ORDER422_M_YCBYCR (0 << 4)
+#define MSCTRL_ORDER422_M_YCRYCB (1 << 4)
+#define MSCTRL_ORDER422_M_CBYCRY (2 << 4)
+#define MSCTRL_ORDER422_M_CRYCBY (3 << 4)
+/* 0 - camera, 1 - DMA */
+#define MSCTRL_SEL_DMA_CAM (1 << 3)
+#define MSCTRL_INFORMAT_M_YCBCR420 (0 << 1)
+#define MSCTRL_INFORMAT_M_YCBCR422 (1 << 1)
+#define MSCTRL_INFORMAT_M_YCBCR422I (2 << 1)
+#define MSCTRL_INFORMAT_M_RGB (3 << 1)
+#define MSCTRL_ENVID_M (1 << 0)
+
+/* CICOSCOSY, CIPRSCOSY. Scan line Y/Cb/Cr offset. */
+#define S3C_CAMIF_REG_CISSY(id) (0x12c + (id) * 0x0c)
+#define S3C_CAMIF_REG_CISSCB(id) (0x130 + (id) * 0x0c)
+#define S3C_CAMIF_REG_CISSCR(id) (0x134 + (id) * 0x0c)
+#define S3C_CISS_OFFS_INITIAL(x) ((x) << 16)
+#define S3C_CISS_OFFS_LINE(x) ((x) << 0)
+
+/* ------------------------------------------------------------------ */
+
+void camif_hw_reset(struct camif_dev *camif);
+void camif_hw_clear_pending_irq(struct camif_vp *vp);
+void camif_hw_clear_fifo_overflow(struct camif_vp *vp);
+void camif_hw_set_lastirq(struct camif_vp *vp, int enable);
+void camif_hw_set_input_path(struct camif_vp *vp);
+void camif_hw_enable_scaler(struct camif_vp *vp, bool on);
+void camif_hw_set_effect(struct camif_vp *vp, bool active);
+void camif_hw_enable_capture(struct camif_vp *vp);
+void camif_hw_disable_capture(struct camif_vp *vp);
+void camif_hw_set_camera_bus(struct camif_dev *camif);
+void camif_hw_set_source_format(struct camif_dev *camif);
+void camif_hw_set_camera_crop(struct camif_dev *camif);
+void camif_hw_set_scaler(struct camif_vp *vp);
+void camif_hw_set_flip(struct camif_vp *vp);
+void camif_hw_set_output_dma(struct camif_vp *vp);
+void camif_hw_set_target_format(struct camif_vp *vp);
+void camif_hw_set_test_pattern(struct camif_dev *camif, unsigned int pattern);
+void camif_hw_set_output_addr(struct camif_vp *vp, struct camif_addr *paddr,
+ int index);
+void camif_hw_dump_regs(struct camif_dev *camif, const char *label);
+
+static inline u32 camif_hw_get_status(struct camif_vp *vp)
+{
+ return readl(vp->camif->io_base + S3C_CAMIF_REG_CISTATUS(vp->id,
+ vp->offset));
+}
+
+#endif /* CAMIF_REGS_H_ */
new file mode 100644
@@ -0,0 +1,46 @@
+/*
+ * s3c24xx/s3c64xx SoC series Camera Interface (CAMIF) driver
+ *
+ * Copyright (c) 2012, Samsung Electronics Co., Ltd.
+ * Sylwester Nawrocki <sylvester.nawrocki@gmail.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 MEDIA_S3C_CAMIF_
+#define MEDIA_S3C_CAMIF_
+
+#include <linux/i2c.h>
+#include <media/v4l2-mediabus.h>
+
+/**
+ * struct s3c_camif_sensor_info - an image sensor description
+ * @i2c_board_info: pointer to an I2C sensor subdevice board info
+ * @clock_frequency: frequency of the clock the host provides to a sensor
+ * @mbus_type: media bus type
+ * @i2c_bus_num: i2c control bus id the sensor is attached to
+ * @flags: the parallel bus flags defining signals polarity (V4L2_MBUS_*)
+ * @use_field: 1 if parallel bus FIELD signal is used (only s3c64xx)
+ */
+struct s3c_camif_sensor_info {
+ struct i2c_board_info i2c_board_info;
+ unsigned long clock_frequency;
+ enum v4l2_mbus_type mbus_type;
+ u16 i2c_bus_num;
+ u16 flags;
+ u8 use_field;
+};
+
+struct s3c_camif_plat_data {
+ struct s3c_camif_sensor_info sensor;
+ int (*gpio_get)(void);
+ int (*gpio_put)(void);
+};
+
+/* Platform default helper functions */
+int s3c_camif_gpio_get(void);
+int s3c_camif_gpio_put(void);
+
+#endif /* MEDIA_S3C_CAMIF_ */