diff options
Diffstat (limited to 'drivers/media/video/blackfin')
| -rw-r--r-- | drivers/media/video/blackfin/Kconfig | 10 | ||||
| -rw-r--r-- | drivers/media/video/blackfin/Makefile | 2 | ||||
| -rw-r--r-- | drivers/media/video/blackfin/bfin_capture.c | 1059 | ||||
| -rw-r--r-- | drivers/media/video/blackfin/ppi.c | 271 |
4 files changed, 1342 insertions, 0 deletions
diff --git a/drivers/media/video/blackfin/Kconfig b/drivers/media/video/blackfin/Kconfig new file mode 100644 index 000000000000..ecd5323768b7 --- /dev/null +++ b/drivers/media/video/blackfin/Kconfig @@ -0,0 +1,10 @@ +config VIDEO_BLACKFIN_CAPTURE + tristate "Blackfin Video Capture Driver" + depends on VIDEO_V4L2 && BLACKFIN && I2C + select VIDEOBUF2_DMA_CONTIG + help + V4L2 bridge driver for Blackfin video capture device. + Choose PPI or EPPI as its interface. + + To compile this driver as a module, choose M here: the + module will be called bfin_video_capture. diff --git a/drivers/media/video/blackfin/Makefile b/drivers/media/video/blackfin/Makefile new file mode 100644 index 000000000000..aa3a0a216387 --- /dev/null +++ b/drivers/media/video/blackfin/Makefile @@ -0,0 +1,2 @@ +bfin_video_capture-objs := bfin_capture.o ppi.o +obj-$(CONFIG_VIDEO_BLACKFIN_CAPTURE) += bfin_video_capture.o diff --git a/drivers/media/video/blackfin/bfin_capture.c b/drivers/media/video/blackfin/bfin_capture.c new file mode 100644 index 000000000000..514fcf742f5a --- /dev/null +++ b/drivers/media/video/blackfin/bfin_capture.c @@ -0,0 +1,1059 @@ +/* + * Analog Devices video capture driver + * + * Copyright (c) 2011 Analog Devices Inc. + * + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <linux/completion.h> +#include <linux/delay.h> +#include <linux/errno.h> +#include <linux/fs.h> +#include <linux/i2c.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/mm.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/time.h> +#include <linux/types.h> + +#include <media/v4l2-chip-ident.h> +#include <media/v4l2-common.h> +#include <media/v4l2-ctrls.h> +#include <media/v4l2-device.h> +#include <media/v4l2-ioctl.h> +#include <media/videobuf2-dma-contig.h> + +#include <asm/dma.h> + +#include <media/blackfin/bfin_capture.h> +#include <media/blackfin/ppi.h> + +#define CAPTURE_DRV_NAME "bfin_capture" +#define BCAP_MIN_NUM_BUF 2 + +struct bcap_format { + char *desc; + u32 pixelformat; + enum v4l2_mbus_pixelcode mbus_code; + int bpp; /* bits per pixel */ +}; + +struct bcap_buffer { + struct vb2_buffer vb; + struct list_head list; +}; + +struct bcap_device { + /* capture device instance */ + struct v4l2_device v4l2_dev; + /* v4l2 control handler */ + struct v4l2_ctrl_handler ctrl_handler; + /* device node data */ + struct video_device *video_dev; + /* sub device instance */ + struct v4l2_subdev *sd; + /* capture config */ + struct bfin_capture_config *cfg; + /* ppi interface */ + struct ppi_if *ppi; + /* current input */ + unsigned int cur_input; + /* current selected standard */ + v4l2_std_id std; + /* used to store pixel format */ + struct v4l2_pix_format fmt; + /* bits per pixel*/ + int bpp; + /* used to store sensor supported format */ + struct bcap_format *sensor_formats; + /* number of sensor formats array */ + int num_sensor_formats; + /* pointing to current video buffer */ + struct bcap_buffer *cur_frm; + /* pointing to next video buffer */ + struct bcap_buffer *next_frm; + /* buffer queue used in videobuf2 */ + struct vb2_queue buffer_queue; + /* allocator-specific contexts for each plane */ + struct vb2_alloc_ctx *alloc_ctx; + /* queue of filled frames */ + struct list_head dma_queue; + /* used in videobuf2 callback */ + spinlock_t lock; + /* used to access capture device */ + struct mutex mutex; + /* used to wait ppi to complete one transfer */ + struct completion comp; + /* prepare to stop */ + bool stop; +}; + +struct bcap_fh { + struct v4l2_fh fh; + /* indicates whether this file handle is doing IO */ + bool io_allowed; +}; + +static const struct bcap_format bcap_formats[] = { + { + .desc = "YCbCr 4:2:2 Interleaved UYVY", + .pixelformat = V4L2_PIX_FMT_UYVY, + .mbus_code = V4L2_MBUS_FMT_UYVY8_2X8, + .bpp = 16, + }, + { + .desc = "YCbCr 4:2:2 Interleaved YUYV", + .pixelformat = V4L2_PIX_FMT_YUYV, + .mbus_code = V4L2_MBUS_FMT_YUYV8_2X8, + .bpp = 16, + }, + { + .desc = "RGB 565", + .pixelformat = V4L2_PIX_FMT_RGB565, + .mbus_code = V4L2_MBUS_FMT_RGB565_2X8_LE, + .bpp = 16, + }, + { + .desc = "RGB 444", + .pixelformat = V4L2_PIX_FMT_RGB444, + .mbus_code = V4L2_MBUS_FMT_RGB444_2X8_PADHI_LE, + .bpp = 16, + }, + +}; +#define BCAP_MAX_FMTS ARRAY_SIZE(bcap_formats) + +static irqreturn_t bcap_isr(int irq, void *dev_id); + +static struct bcap_buffer *to_bcap_vb(struct vb2_buffer *vb) +{ + return container_of(vb, struct bcap_buffer, vb); +} + +static int bcap_init_sensor_formats(struct bcap_device *bcap_dev) +{ + enum v4l2_mbus_pixelcode code; + struct bcap_format *sf; + unsigned int num_formats = 0; + int i, j; + + while (!v4l2_subdev_call(bcap_dev->sd, video, + enum_mbus_fmt, num_formats, &code)) + num_formats++; + if (!num_formats) + return -ENXIO; + + sf = kzalloc(num_formats * sizeof(*sf), GFP_KERNEL); + if (!sf) + return -ENOMEM; + + for (i = 0; i < num_formats; i++) { + v4l2_subdev_call(bcap_dev->sd, video, + enum_mbus_fmt, i, &code); + for (j = 0; j < BCAP_MAX_FMTS; j++) + if (code == bcap_formats[j].mbus_code) + break; + if (j == BCAP_MAX_FMTS) { + /* we don't allow this sensor working with our bridge */ + kfree(sf); + return -EINVAL; + } + sf[i] = bcap_formats[j]; + } + bcap_dev->sensor_formats = sf; + bcap_dev->num_sensor_formats = num_formats; + return 0; +} + +static void bcap_free_sensor_formats(struct bcap_device *bcap_dev) +{ + bcap_dev->num_sensor_formats = 0; + kfree(bcap_dev->sensor_formats); + bcap_dev->sensor_formats = NULL; +} + +static int bcap_open(struct file *file) +{ + struct bcap_device *bcap_dev = video_drvdata(file); + struct video_device *vfd = bcap_dev->video_dev; + struct bcap_fh *bcap_fh; + + if (!bcap_dev->sd) { + v4l2_err(&bcap_dev->v4l2_dev, "No sub device registered\n"); + return -ENODEV; + } + + bcap_fh = kzalloc(sizeof(*bcap_fh), GFP_KERNEL); + if (!bcap_fh) { + v4l2_err(&bcap_dev->v4l2_dev, + "unable to allocate memory for file handle object\n"); + return -ENOMEM; + } + + v4l2_fh_init(&bcap_fh->fh, vfd); + + /* store pointer to v4l2_fh in private_data member of file */ + file->private_data = &bcap_fh->fh; + v4l2_fh_add(&bcap_fh->fh); + bcap_fh->io_allowed = false; + return 0; +} + +static int bcap_release(struct file *file) +{ + struct bcap_device *bcap_dev = video_drvdata(file); + struct v4l2_fh *fh = file->private_data; + struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh); + + /* if this instance is doing IO */ + if (bcap_fh->io_allowed) + vb2_queue_release(&bcap_dev->buffer_queue); + + file->private_data = NULL; + v4l2_fh_del(&bcap_fh->fh); + v4l2_fh_exit(&bcap_fh->fh); + kfree(bcap_fh); + return 0; +} + +static int bcap_mmap(struct file *file, struct vm_area_struct *vma) +{ + struct bcap_device *bcap_dev = video_drvdata(file); + + return vb2_mmap(&bcap_dev->buffer_queue, vma); +} + +#ifndef CONFIG_MMU +static unsigned long bcap_get_unmapped_area(struct file *file, + unsigned long addr, + unsigned long len, + unsigned long pgoff, + unsigned long flags) +{ + struct bcap_device *bcap_dev = video_drvdata(file); + + return vb2_get_unmapped_area(&bcap_dev->buffer_queue, + addr, + len, + pgoff, + flags); +} +#endif + +static unsigned int bcap_poll(struct file *file, poll_table *wait) +{ + struct bcap_device *bcap_dev = video_drvdata(file); + + return vb2_poll(&bcap_dev->buffer_queue, file, wait); +} + +static int bcap_queue_setup(struct vb2_queue *vq, + const struct v4l2_format *fmt, + unsigned int *nbuffers, unsigned int *nplanes, + unsigned int sizes[], void *alloc_ctxs[]) +{ + struct bcap_device *bcap_dev = vb2_get_drv_priv(vq); + + if (*nbuffers < BCAP_MIN_NUM_BUF) + *nbuffers = BCAP_MIN_NUM_BUF; + + *nplanes = 1; + sizes[0] = bcap_dev->fmt.sizeimage; + alloc_ctxs[0] = bcap_dev->alloc_ctx; + + return 0; +} + +static int bcap_buffer_init(struct vb2_buffer *vb) +{ + struct bcap_buffer *buf = to_bcap_vb(vb); + + INIT_LIST_HEAD(&buf->list); + return 0; +} + +static int bcap_buffer_prepare(struct vb2_buffer *vb) +{ + struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue); + struct bcap_buffer *buf = to_bcap_vb(vb); + unsigned long size; + + size = bcap_dev->fmt.sizeimage; + if (vb2_plane_size(vb, 0) < size) { + v4l2_err(&bcap_dev->v4l2_dev, "buffer too small (%lu < %lu)\n", + vb2_plane_size(vb, 0), size); + return -EINVAL; + } + vb2_set_plane_payload(&buf->vb, 0, size); + + return 0; +} + +static void bcap_buffer_queue(struct vb2_buffer *vb) +{ + struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue); + struct bcap_buffer *buf = to_bcap_vb(vb); + unsigned long flags; + + spin_lock_irqsave(&bcap_dev->lock, flags); + list_add_tail(&buf->list, &bcap_dev->dma_queue); + spin_unlock_irqrestore(&bcap_dev->lock, flags); +} + +static void bcap_buffer_cleanup(struct vb2_buffer *vb) +{ + struct bcap_device *bcap_dev = vb2_get_drv_priv(vb->vb2_queue); + struct bcap_buffer *buf = to_bcap_vb(vb); + unsigned long flags; + + spin_lock_irqsave(&bcap_dev->lock, flags); + list_del_init(&buf->list); + spin_unlock_irqrestore(&bcap_dev->lock, flags); +} + +static void bcap_lock(struct vb2_queue *vq) +{ + struct bcap_device *bcap_dev = vb2_get_drv_priv(vq); + mutex_lock(&bcap_dev->mutex); +} + +static void bcap_unlock(struct vb2_queue *vq) +{ + struct bcap_device *bcap_dev = vb2_get_drv_priv(vq); + mutex_unlock(&bcap_dev->mutex); +} + +static int bcap_start_streaming(struct vb2_queue *vq, unsigned int count) +{ + struct bcap_device *bcap_dev = vb2_get_drv_priv(vq); + struct ppi_if *ppi = bcap_dev->ppi; + struct ppi_params params; + int ret; + + /* enable streamon on the sub device */ + ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 1); + if (ret && (ret != -ENOIOCTLCMD)) { + v4l2_err(&bcap_dev->v4l2_dev, "stream on failed in subdev\n"); + return ret; + } + + /* set ppi params */ + params.width = bcap_dev->fmt.width; + params.height = bcap_dev->fmt.height; + params.bpp = bcap_dev->bpp; + params.ppi_control = bcap_dev->cfg->ppi_control; + params.int_mask = bcap_dev->cfg->int_mask; + params.blank_clocks = bcap_dev->cfg->blank_clocks; + ret = ppi->ops->set_params(ppi, ¶ms); + if (ret < 0) { + v4l2_err(&bcap_dev->v4l2_dev, + "Error in setting ppi params\n"); + return ret; + } + + /* attach ppi DMA irq handler */ + ret = ppi->ops->attach_irq(ppi, bcap_isr); + if (ret < 0) { + v4l2_err(&bcap_dev->v4l2_dev, + "Error in attaching interrupt handler\n"); + return ret; + } + + INIT_COMPLETION(bcap_dev->comp); + bcap_dev->stop = false; + return 0; +} + +static int bcap_stop_streaming(struct vb2_queue *vq) +{ + struct bcap_device *bcap_dev = vb2_get_drv_priv(vq); + struct ppi_if *ppi = bcap_dev->ppi; + int ret; + + if (!vb2_is_streaming(vq)) + return 0; + + bcap_dev->stop = true; + wait_for_completion(&bcap_dev->comp); + ppi->ops->stop(ppi); + ppi->ops->detach_irq(ppi); + ret = v4l2_subdev_call(bcap_dev->sd, video, s_stream, 0); + if (ret && (ret != -ENOIOCTLCMD)) + v4l2_err(&bcap_dev->v4l2_dev, + "stream off failed in subdev\n"); + + /* release all active buffers */ + while (!list_empty(&bcap_dev->dma_queue)) { + bcap_dev->next_frm = list_entry(bcap_dev->dma_queue.next, + struct bcap_buffer, list); + list_del(&bcap_dev->next_frm->list); + vb2_buffer_done(&bcap_dev->next_frm->vb, VB2_BUF_STATE_ERROR); + } + return 0; +} + +static struct vb2_ops bcap_video_qops = { + .queue_setup = bcap_queue_setup, + .buf_init = bcap_buffer_init, + .buf_prepare = bcap_buffer_prepare, + .buf_cleanup = bcap_buffer_cleanup, + .buf_queue = bcap_buffer_queue, + .wait_prepare = bcap_unlock, + .wait_finish = bcap_lock, + .start_streaming = bcap_start_streaming, + .stop_streaming = bcap_stop_streaming, +}; + +static int bcap_reqbufs(struct file *file, void *priv, + struct v4l2_requestbuffers *req_buf) +{ + struct bcap_device *bcap_dev = video_drvdata(file); + struct vb2_queue *vq = &bcap_dev->buffer_queue; + struct v4l2_fh *fh = file->private_data; + struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh); + + if (vb2_is_busy(vq)) + return -EBUSY; + + bcap_fh->io_allowed = true; + + return vb2_reqbufs(vq, req_buf); +} + +static int bcap_querybuf(struct file *file, void *priv, + struct v4l2_buffer *buf) +{ + struct bcap_device *bcap_dev = video_drvdata(file); + + return vb2_querybuf(&bcap_dev->buffer_queue, buf); +} + +static int bcap_qbuf(struct file *file, void *priv, + struct v4l2_buffer *buf) +{ + struct bcap_device *bcap_dev = video_drvdata(file); + struct v4l2_fh *fh = file->private_data; + struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh); + + if (!bcap_fh->io_allowed) + return -EBUSY; + + return vb2_qbuf(&bcap_dev->buffer_queue, buf); +} + +static int bcap_dqbuf(struct file *file, void *priv, + struct v4l2_buffer *buf) +{ + struct bcap_device *bcap_dev = video_drvdata(file); + struct v4l2_fh *fh = file->private_data; + struct bcap_fh *bcap_fh = container_of(fh, struct bcap_fh, fh); + + if (!bcap_fh->io_allowed) + return -EBUSY; + + return vb2_dqbuf(&bcap_dev->buffer_queue, + buf, file->f_flags & O_NONBLOCK); +} + +static irqreturn_t bcap_isr(int irq, void *dev_id) +{ + struct ppi_if *ppi = dev_id; + struct bcap_device *bcap_dev = ppi->priv; + struct timeval timevalue; + struct vb2_buffer *vb = &bcap_dev->cur_frm->vb; + dma_addr_t addr; + + spin_lock(&bcap_dev->lock); + + if (bcap_dev->cur_frm != bcap_dev->next_frm) { + do_gettimeofday(&timevalue); + vb->v4l2_buf.timestamp = timevalue; + vb2_buffer_done(vb, VB2_BUF_STATE_DONE); + bcap_dev->cur_frm = bcap_dev->next_frm; + } + + ppi->ops->stop(ppi); + + if (bcap_dev->stop) { + complete(&bcap_dev->comp); + } else { + if (!list_empty(&bcap_dev->dma_queue)) { + bcap_dev->next_frm = list_entry(bcap_dev->dma_queue.next, + struct bcap_buffer, list); + list_del(&bcap_dev->next_frm->list); + addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->next_frm->vb, 0); + ppi->ops->update_addr(ppi, (unsigned long)addr); + } + ppi->ops->start(ppi); + } + + spin_unlock(&bcap_dev->lock); + + return IRQ_HANDLED; +} + +static int bcap_streamon(struct file *file, void *priv, + enum v4l2_buf_type buf_type) +{ + struct bcap_device *bcap_dev = video_drvdata(file); + struct bcap_fh *fh = file->private_data; + struct ppi_if *ppi = bcap_dev->ppi; + dma_addr_t addr; + int ret; + + if (!fh->io_allowed) + return -EBUSY; + + /* call streamon to start streaming in videobuf */ + ret = vb2_streamon(&bcap_dev->buffer_queue, buf_type); + if (ret) + return ret; + + /* if dma queue is empty, return error */ + if (list_empty(&bcap_dev->dma_queue)) { + v4l2_err(&bcap_dev->v4l2_dev, "dma queue is empty\n"); + ret = -EINVAL; + goto err; + } + + /* get the next frame from the dma queue */ + bcap_dev->next_frm = list_entry(bcap_dev->dma_queue.next, + struct bcap_buffer, list); + bcap_dev->cur_frm = bcap_dev->next_frm; + /* remove buffer from the dma queue */ + list_del(&bcap_dev->cur_frm->list); + addr = vb2_dma_contig_plane_dma_addr(&bcap_dev->cur_frm->vb, 0); + /* update DMA address */ + ppi->ops->update_addr(ppi, (unsigned long)addr); + /* enable ppi */ + ppi->ops->start(ppi); + + return 0; +err: + vb2_streamoff(&bcap_dev->buffer_queue, buf_type); + return ret; +} + +static int bcap_streamoff(struct file *file, void *priv, + enum v4l2_buf_type buf_type) +{ + struct bcap_device *bcap_dev = video_drvdata(file); + struct bcap_fh *fh = file->private_data; + + if (!fh->io_allowed) + return -EBUSY; + + return vb2_streamoff(&bcap_dev->buffer_queue, buf_type); +} + +static int bcap_querystd(struct file *file, void *priv, v4l2_std_id *std) +{ + struct bcap_device *bcap_dev = video_drvdata(file); + + return v4l2_subdev_call(bcap_dev->sd, video, querystd, std); +} + +static int bcap_g_std(struct file *file, void *priv, v4l2_std_id *std) +{ + struct bcap_device *bcap_dev = video_drvdata(file); + + *std = bcap_dev->std; + return 0; +} + +static int bcap_s_std(struct file *file, void *priv, v4l2_std_id *std) +{ + struct bcap_device *bcap_dev = video_drvdata(file); + int ret; + + if (vb2_is_busy(&bcap_dev->buffer_queue)) + return -EBUSY; + + ret = v4l2_subdev_call(bcap_dev->sd, core, s_std, *std); + if (ret < 0) + return ret; + + bcap_dev->std = *std; + return 0; +} + +static int bcap_enum_input(struct file *file, void *priv, + struct v4l2_input *input) +{ + struct bcap_device *bcap_dev = video_drvdata(file); + struct bfin_capture_config *config = bcap_dev->cfg; + int ret; + u32 status; + + if (input->index >= config->num_inputs) + return -EINVAL; + + *input = config->inputs[input->index]; + /* get input status */ + ret = v4l2_subdev_call(bcap_dev->sd, video, g_input_status, &status); + if (!ret) + input->status = status; + return 0; +} + +static int bcap_g_input(struct file *file, void *priv, unsigned int *index) +{ + struct bcap_device *bcap_dev = video_drvdata(file); + + *index = bcap_dev->cur_input; + return 0; +} + +static int bcap_s_input(struct file *file, void *priv, unsigned int index) +{ + struct bcap_device *bcap_dev = video_drvdata(file); + struct bfin_capture_config *config = bcap_dev->cfg; + struct bcap_route *route; + int ret; + + if (vb2_is_busy(&bcap_dev->buffer_queue)) + return -EBUSY; + + if (index >= config->num_inputs) + return -EINVAL; + + route = &config->routes[index]; + ret = v4l2_subdev_call(bcap_dev->sd, video, s_routing, + route->input, route->output, 0); + if ((ret < 0) && (ret != -ENOIOCTLCMD)) { + v4l2_err(&bcap_dev->v4l2_dev, "Failed to set input\n"); + return ret; + } + bcap_dev->cur_input = index; + return 0; +} + +static int bcap_try_format(struct bcap_device *bcap, + struct v4l2_pix_format *pixfmt, + enum v4l2_mbus_pixelcode *mbus_code, + int *bpp) +{ + struct bcap_format *sf = bcap->sensor_formats; + struct bcap_format *fmt = NULL; + struct v4l2_mbus_framefmt mbus_fmt; + int ret, i; + + for (i = 0; i < bcap->num_sensor_formats; i++) { + fmt = &sf[i]; + if (pixfmt->pixelformat == fmt->pixelformat) + break; + } + if (i == bcap->num_sensor_formats) + fmt = &sf[0]; + + if (mbus_code) + *mbus_code = fmt->mbus_code; + if (bpp) + *bpp = fmt->bpp; + v4l2_fill_mbus_format(&mbus_fmt, pixfmt, fmt->mbus_code); + ret = v4l2_subdev_call(bcap->sd, video, + try_mbus_fmt, &mbus_fmt); + if (ret < 0) + return ret; + v4l2_fill_pix_format(pixfmt, &mbus_fmt); + pixfmt->bytesperline = pixfmt->width * fmt->bpp / 8; + pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height; + return 0; +} + +static int bcap_enum_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_fmtdesc *fmt) +{ + struct bcap_device *bcap_dev = video_drvdata(file); + struct bcap_format *sf = bcap_dev->sensor_formats; + + if (fmt->index >= bcap_dev->num_sensor_formats) + return -EINVAL; + + fmt->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + strlcpy(fmt->description, + sf[fmt->index].desc, + sizeof(fmt->description)); + fmt->pixelformat = sf[fmt->index].pixelformat; + return 0; +} + +static int bcap_try_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *fmt) +{ + struct bcap_device *bcap_dev = video_drvdata(file); + struct v4l2_pix_format *pixfmt = &fmt->fmt.pix; + + return bcap_try_format(bcap_dev, pixfmt, NULL, NULL); +} + +static int bcap_g_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *fmt) +{ + struct bcap_device *bcap_dev = video_drvdata(file); + + fmt->fmt.pix = bcap_dev->fmt; + return 0; +} + +static int bcap_s_fmt_vid_cap(struct file *file, void *priv, + struct v4l2_format *fmt) +{ + struct bcap_device *bcap_dev = video_drvdata(file); + struct v4l2_mbus_framefmt mbus_fmt; + enum v4l2_mbus_pixelcode mbus_code; + struct v4l2_pix_format *pixfmt = &fmt->fmt.pix; + int ret, bpp; + + if (vb2_is_busy(&bcap_dev->buffer_queue)) + return -EBUSY; + + /* see if format works */ + ret = bcap_try_format(bcap_dev, pixfmt, &mbus_code, &bpp); + if (ret < 0) + return ret; + + v4l2_fill_mbus_format(&mbus_fmt, pixfmt, mbus_code); + ret = v4l2_subdev_call(bcap_dev->sd, video, s_mbus_fmt, &mbus_fmt); + if (ret < 0) + return ret; + bcap_dev->fmt = *pixfmt; + bcap_dev->bpp = bpp; + return 0; +} + +static int bcap_querycap(struct file *file, void *priv, + struct v4l2_capability *cap) +{ + struct bcap_device *bcap_dev = video_drvdata(file); + + cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING; + strlcpy(cap->driver, CAPTURE_DRV_NAME, sizeof(cap->driver)); + strlcpy(cap->bus_info, "Blackfin Platform", sizeof(cap->bus_info)); + strlcpy(cap->card, bcap_dev->cfg->card_name, sizeof(cap->card)); + return 0; +} + +static int bcap_g_parm(struct file *file, void *fh, + struct v4l2_streamparm *a) +{ + struct bcap_device *bcap_dev = video_drvdata(file); + + if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + return v4l2_subdev_call(bcap_dev->sd, video, g_parm, a); +} + +static int bcap_s_parm(struct file *file, void *fh, + struct v4l2_streamparm *a) +{ + struct bcap_device *bcap_dev = video_drvdata(file); + + if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + return v4l2_subdev_call(bcap_dev->sd, video, s_parm, a); +} + +static int bcap_g_chip_ident(struct file *file, void *priv, + struct v4l2_dbg_chip_ident *chip) +{ + struct bcap_device *bcap_dev = video_drvdata(file); + + chip->ident = V4L2_IDENT_NONE; + chip->revision = 0; + if (chip->match.type != V4L2_CHIP_MATCH_I2C_DRIVER && + chip->match.type != V4L2_CHIP_MATCH_I2C_ADDR) + return -EINVAL; + + return v4l2_subdev_call(bcap_dev->sd, core, + g_chip_ident, chip); +} + +#ifdef CONFIG_VIDEO_ADV_DEBUG +static int bcap_dbg_g_register(struct file *file, void *priv, + struct v4l2_dbg_register *reg) +{ + struct bcap_device *bcap_dev = video_drvdata(file); + + return v4l2_subdev_call(bcap_dev->sd, core, + g_register, reg); +} + +static int bcap_dbg_s_register(struct file *file, void *priv, + struct v4l2_dbg_register *reg) +{ + struct bcap_device *bcap_dev = video_drvdata(file); + + return v4l2_subdev_call(bcap_dev->sd, core, + s_register, reg); +} +#endif + +static int bcap_log_status(struct file *file, void *priv) +{ + struct bcap_device *bcap_dev = video_drvdata(file); + /* status for sub devices */ + v4l2_device_call_all(&bcap_dev->v4l2_dev, 0, core, log_status); + return 0; +} + +static const struct v4l2_ioctl_ops bcap_ioctl_ops = { + .vidioc_querycap = bcap_querycap, + .vidioc_g_fmt_vid_cap = bcap_g_fmt_vid_cap, + .vidioc_enum_fmt_vid_cap = bcap_enum_fmt_vid_cap, + .vidioc_s_fmt_vid_cap = bcap_s_fmt_vid_cap, + .vidioc_try_fmt_vid_cap = bcap_try_fmt_vid_cap, + .vidioc_enum_input = bcap_enum_input, + .vidioc_g_input = bcap_g_input, + .vidioc_s_input = bcap_s_input, + .vidioc_querystd = bcap_querystd, + .vidioc_s_std = bcap_s_std, + .vidioc_g_std = bcap_g_std, + .vidioc_reqbufs = bcap_reqbufs, + .vidioc_querybuf = bcap_querybuf, + .vidioc_qbuf = bcap_qbuf, + .vidioc_dqbuf = bcap_dqbuf, + .vidioc_streamon = bcap_streamon, + .vidioc_streamoff = bcap_streamoff, + .vidioc_g_parm = bcap_g_parm, + .vidioc_s_parm = bcap_s_parm, + .vidioc_g_chip_ident = bcap_g_chip_ident, +#ifdef CONFIG_VIDEO_ADV_DEBUG + .vidioc_g_register = bcap_dbg_g_register, + .vidioc_s_register = bcap_dbg_s_register, +#endif + .vidioc_log_status = bcap_log_status, +}; + +static struct v4l2_file_operations bcap_fops = { + .owner = THIS_MODULE, + .open = bcap_open, + .release = bcap_release, + .unlocked_ioctl = video_ioctl2, + .mmap = bcap_mmap, +#ifndef CONFIG_MMU + .get_unmapped_area = bcap_get_unmapped_area, +#endif + .poll = bcap_poll +}; + +static int __devinit bcap_probe(struct platform_device *pdev) +{ + struct bcap_device *bcap_dev; + struct video_device *vfd; + struct i2c_adapter *i2c_adap; + struct bfin_capture_config *config; + struct vb2_queue *q; + int ret; + + config = pdev->dev.platform_data; + if (!config) { + v4l2_err(pdev->dev.driver, "Unable to get board config\n"); + return -ENODEV; + } + + bcap_dev = kzalloc(sizeof(*bcap_dev), GFP_KERNEL); + if (!bcap_dev) { + v4l2_err(pdev->dev.driver, "Unable to alloc bcap_dev\n"); + return -ENOMEM; + } + + bcap_dev->cfg = config; + + bcap_dev->ppi = ppi_create_instance(config->ppi_info); + if (!bcap_dev->ppi) { + v4l2_err(pdev->dev.driver, "Unable to create ppi\n"); + ret = -ENODEV; + goto err_free_dev; + } + bcap_dev->ppi->priv = bcap_dev; + + bcap_dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev); + if (IS_ERR(bcap_dev->alloc_ctx)) { + ret = PTR_ERR(bcap_dev->alloc_ctx); + goto err_free_ppi; + } + + vfd = video_device_alloc(); + if (!vfd) { + ret = -ENOMEM; + v4l2_err(pdev->dev.driver, "Unable to alloc video device\n"); + goto err_cleanup_ctx; + } + + /* initialize field of video device */ + vfd->release = video_device_release; + vfd->fops = &bcap_fops; + vfd->ioctl_ops = &bcap_ioctl_ops; + vfd->tvnorms = 0; + vfd->v4l2_dev = &bcap_dev->v4l2_dev; + set_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags); + strncpy(vfd->name, CAPTURE_DRV_NAME, sizeof(vfd->name)); + bcap_dev->video_dev = vfd; + + ret = v4l2_device_register(&pdev->dev, &bcap_dev->v4l2_dev); + if (ret) { + v4l2_err(pdev->dev.driver, + "Unable to register v4l2 device\n"); + goto err_release_vdev; + } + v4l2_info(&bcap_dev->v4l2_dev, "v4l2 device registered\n"); + + bcap_dev->v4l2_dev.ctrl_handler = &bcap_dev->ctrl_handler; + ret = v4l2_ctrl_handler_init(&bcap_dev->ctrl_handler, 0); + if (ret) { + v4l2_err(&bcap_dev->v4l2_dev, + "Unable to init control handler\n"); + goto err_unreg_v4l2; + } + + spin_lock_init(&bcap_dev->lock); + /* initialize queue */ + q = &bcap_dev->buffer_queue; + q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + q->io_modes = VB2_MMAP; + q->drv_priv = bcap_dev; + q->buf_struct_size = sizeof(struct bcap_buffer); + q->ops = &bcap_video_qops; + q->mem_ops = &vb2_dma_contig_memops; + + vb2_queue_init(q); + + mutex_init(&bcap_dev->mutex); + init_completion(&bcap_dev->comp); + + /* init video dma queues */ + INIT_LIST_HEAD(&bcap_dev->dma_queue); + + vfd->lock = &bcap_dev->mutex; + + /* register video device */ + ret = video_register_device(bcap_dev->video_dev, VFL_TYPE_GRABBER, -1); + if (ret) { + v4l2_err(&bcap_dev->v4l2_dev, + "Unable to register video device\n"); + goto err_free_handler; + } + video_set_drvdata(bcap_dev->video_dev, bcap_dev); + v4l2_info(&bcap_dev->v4l2_dev, "video device registered as: %s\n", + video_device_node_name(vfd)); + + /* load up the subdevice */ + i2c_adap = i2c_get_adapter(config->i2c_adapter_id); + if (!i2c_adap) { + v4l2_err(&bcap_dev->v4l2_dev, + "Unable to find i2c adapter\n"); + goto err_unreg_vdev; + + } + bcap_dev->sd = v4l2_i2c_new_subdev_board(&bcap_dev->v4l2_dev, + i2c_adap, + &config->board_info, + NULL); + if (bcap_dev->sd) { + int i; + /* update tvnorms from the sub devices */ + for (i = 0; i < config->num_inputs; i++) + vfd->tvnorms |= config->inputs[i].std; + } else { + v4l2_err(&bcap_dev->v4l2_dev, + "Unable to register sub device\n"); + goto err_unreg_vdev; + } + + v4l2_info(&bcap_dev->v4l2_dev, "v4l2 sub device registered\n"); + + /* now we can probe the default state */ + if (vfd->tvnorms) { + v4l2_std_id std; + ret = v4l2_subdev_call(bcap_dev->sd, core, g_std, &std); + if (ret) { + v4l2_err(&bcap_dev->v4l2_dev, + "Unable to get std\n"); + goto err_unreg_vdev; + } + bcap_dev->std = std; + } + ret = bcap_init_sensor_formats(bcap_dev); + if (ret) { + v4l2_err(&bcap_dev->v4l2_dev, + "Unable to create sensor formats table\n"); + goto err_unreg_vdev; + } + return 0; +err_unreg_vdev: + video_unregister_device(bcap_dev->video_dev); + bcap_dev->video_dev = NULL; +err_free_handler: + v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler); +err_unreg_v4l2: + v4l2_device_unregister(&bcap_dev->v4l2_dev); +err_release_vdev: + if (bcap_dev->video_dev) + video_device_release(bcap_dev->video_dev); +err_cleanup_ctx: + vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx); +err_free_ppi: + ppi_delete_instance(bcap_dev->ppi); +err_free_dev: + kfree(bcap_dev); + return ret; +} + +static int __devexit bcap_remove(struct platform_device *pdev) +{ + struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev); + struct bcap_device *bcap_dev = container_of(v4l2_dev, + struct bcap_device, v4l2_dev); + + bcap_free_sensor_formats(bcap_dev); + video_unregister_device(bcap_dev->video_dev); + v4l2_ctrl_handler_free(&bcap_dev->ctrl_handler); + v4l2_device_unregister(v4l2_dev); + vb2_dma_contig_cleanup_ctx(bcap_dev->alloc_ctx); + ppi_delete_instance(bcap_dev->ppi); + kfree(bcap_dev); + return 0; +} + +static struct platform_driver bcap_driver = { + .driver = { + .name = CAPTURE_DRV_NAME, + .owner = THIS_MODULE, + }, + .probe = bcap_probe, + .remove = __devexit_p(bcap_remove), +}; + +static __init int bcap_init(void) +{ + return platform_driver_register(&bcap_driver); +} + +static __exit void bcap_exit(void) +{ + platform_driver_unregister(&bcap_driver); +} + +module_init(bcap_init); +module_exit(bcap_exit); + +MODULE_DESCRIPTION("Analog Devices blackfin video capture driver"); +MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/media/video/blackfin/ppi.c b/drivers/media/video/blackfin/ppi.c new file mode 100644 index 000000000000..d29592186b02 --- /dev/null +++ b/drivers/media/video/blackfin/ppi.c @@ -0,0 +1,271 @@ +/* + * ppi.c Analog Devices Parallel Peripheral Interface driver + * + * Copyright (c) 2011 Analog Devices Inc. + * + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <linux/slab.h> + +#include <asm/bfin_ppi.h> +#include <asm/blackfin.h> +#include <asm/cacheflush.h> +#include <asm/dma.h> +#include <asm/portmux.h> + +#include <media/blackfin/ppi.h> + +static int ppi_attach_irq(struct ppi_if *ppi, irq_handler_t handler); +static void ppi_detach_irq(struct ppi_if *ppi); +static int ppi_start(struct ppi_if *ppi); +static int ppi_stop(struct ppi_if *ppi); +static int ppi_set_params(struct ppi_if *ppi, struct ppi_params *params); +static void ppi_update_addr(struct ppi_if *ppi, unsigned long addr); + +static const struct ppi_ops ppi_ops = { + .attach_irq = ppi_attach_irq, + .detach_irq = ppi_detach_irq, + .start = ppi_start, + .stop = ppi_stop, + .set_params = ppi_set_params, + .update_addr = ppi_update_addr, +}; + +static irqreturn_t ppi_irq_err(int irq, void *dev_id) +{ + struct ppi_if *ppi = dev_id; + const struct ppi_info *info = ppi->info; + + switch (info->type) { + case PPI_TYPE_PPI: + { + struct bfin_ppi_regs *reg = info->base; + unsigned short status; + + /* register on bf561 is cleared when read + * others are W1C + */ + status = bfin_read16(®->status); + bfin_write16(®->status, 0xff00); + break; + } + case PPI_TYPE_EPPI: + { + struct bfin_eppi_regs *reg = info->base; + bfin_write16(®->status, 0xffff); + break; + } + default: + break; + } + + return IRQ_HANDLED; +} + +static int ppi_attach_irq(struct ppi_if *ppi, irq_handler_t handler) +{ + const struct ppi_info *info = ppi->info; + int ret; + + ret = request_dma(info->dma_ch, "PPI_DMA"); + + if (ret) { + pr_err("Unable to allocate DMA channel for PPI\n"); + return ret; + } + set_dma_callback(info->dma_ch, handler, ppi); + + if (ppi->err_int) { + ret = request_irq(info->irq_err, ppi_irq_err, 0, "PPI ERROR", ppi); + if (ret) { + pr_err("Unable to allocate IRQ for PPI\n"); + free_dma(info->dma_ch); + } + } + return ret; +} + +static void ppi_detach_irq(struct ppi_if *ppi) +{ + const struct ppi_info *info = ppi->info; + + if (ppi->err_int) + free_irq(info->irq_err, ppi); + free_dma(info->dma_ch); +} + +static int ppi_start(struct ppi_if *ppi) +{ + const struct ppi_info *info = ppi->info; + + /* enable DMA */ + enable_dma(info->dma_ch); + + /* enable PPI */ + ppi->ppi_control |= PORT_EN; + switch (info->type) { + case PPI_TYPE_PPI: + { + struct bfin_ppi_regs *reg = info->base; + bfin_write16(®->control, ppi->ppi_control); + break; + } + case PPI_TYPE_EPPI: + { + struct bfin_eppi_regs *reg = info->base; + bfin_write32(®->control, ppi->ppi_control); + break; + } + default: + return -EINVAL; + } + + SSYNC(); + return 0; +} + +static int ppi_stop(struct ppi_if *ppi) +{ + const struct ppi_info *info = ppi->info; + + /* disable PPI */ + ppi->ppi_control &= ~PORT_EN; + switch (info->type) { + case PPI_TYPE_PPI: + { + struct bfin_ppi_regs *reg = info->base; + bfin_write16(®->control, ppi->ppi_control); + break; + } + case PPI_TYPE_EPPI: + { + struct bfin_eppi_regs *reg = info->base; + bfin_write32(®->control, ppi->ppi_control); + break; + } + default: + return -EINVAL; + } + + /* disable DMA */ + clear_dma_irqstat(info->dma_ch); + disable_dma(info->dma_ch); + + SSYNC(); + return 0; +} + +static int ppi_set_params(struct ppi_if *ppi, struct ppi_params *params) +{ + const struct ppi_info *info = ppi->info; + int dma32 = 0; + int dma_config, bytes_per_line, lines_per_frame; + + bytes_per_line = params->width * params->bpp / 8; + lines_per_frame = params->height; + if (params->int_mask == 0xFFFFFFFF) + ppi->err_int = false; + else + ppi->err_int = true; + + dma_config = (DMA_FLOW_STOP | WNR | RESTART | DMA2D | DI_EN); + ppi->ppi_control = params->ppi_control & ~PORT_EN; + switch (info->type) { + case PPI_TYPE_PPI: + { + struct bfin_ppi_regs *reg = info->base; + + if (params->ppi_control & DMA32) + dma32 = 1; + + bfin_write16(®->control, ppi->ppi_control); + bfin_write16(®->count, bytes_per_line - 1); + bfin_write16(®->frame, lines_per_frame); + break; + } + case PPI_TYPE_EPPI: + { + struct bfin_eppi_regs *reg = info->base; + + if ((params->ppi_control & PACK_EN) + || (params->ppi_control & 0x38000) > DLEN_16) + dma32 = 1; + + bfin_write32(®->control, ppi->ppi_control); + bfin_write16(®->line, bytes_per_line + params->blank_clocks); + bfin_write16(®->frame, lines_per_frame); + bfin_write16(®->hdelay, 0); + bfin_write16(®->vdelay, 0); + bfin_write16(®->hcount, bytes_per_line); + bfin_write16(®->vcount, lines_per_frame); + break; + } + default: + return -EINVAL; + } + + if (dma32) { + dma_config |= WDSIZE_32; + set_dma_x_count(info->dma_ch, bytes_per_line >> 2); + set_dma_x_modify(info->dma_ch, 4); + set_dma_y_modify(info->dma_ch, 4); + } else { + dma_config |= WDSIZE_16; + set_dma_x_count(info->dma_ch, bytes_per_line >> 1); + set_dma_x_modify(info->dma_ch, 2); + set_dma_y_modify(info->dma_ch, 2); + } + set_dma_y_count(info->dma_ch, lines_per_frame); + set_dma_config(info->dma_ch, dma_config); + + SSYNC(); + return 0; +} + +static void ppi_update_addr(struct ppi_if *ppi, unsigned long addr) +{ + set_dma_start_addr(ppi->info->dma_ch, addr); +} + +struct ppi_if *ppi_create_instance(const struct ppi_info *info) +{ + struct ppi_if *ppi; + + if (!info || !info->pin_req) + return NULL; + + if (peripheral_request_list(info->pin_req, KBUILD_MODNAME)) { + pr_err("request peripheral failed\n"); + return NULL; + } + + ppi = kzalloc(sizeof(*ppi), GFP_KERNEL); + if (!ppi) { + peripheral_free_list(info->pin_req); + pr_err("unable to allocate memory for ppi handle\n"); + return NULL; + } + ppi->ops = &ppi_ops; + ppi->info = info; + + pr_info("ppi probe success\n"); + return ppi; +} + +void ppi_delete_instance(struct ppi_if *ppi) +{ + peripheral_free_list(ppi->info->pin_req); + kfree(ppi); +} |
