diff options
Diffstat (limited to 'drivers/media/platform/fsl-viu.c')
| -rw-r--r-- | drivers/media/platform/fsl-viu.c | 1618 |
1 files changed, 1618 insertions, 0 deletions
diff --git a/drivers/media/platform/fsl-viu.c b/drivers/media/platform/fsl-viu.c new file mode 100644 index 000000000..83086eea1 --- /dev/null +++ b/drivers/media/platform/fsl-viu.c @@ -0,0 +1,1618 @@ +/* + * Copyright 2008-2010 Freescale Semiconductor, Inc. All Rights Reserved. + * + * Freescale VIU video driver + * + * Authors: Hongjun Chen <hong-jun.chen@freescale.com> + * Porting to 2.6.35 by DENX Software Engineering, + * Anatolij Gustschin <agust@denx.de> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + */ + +#include <linux/module.h> +#include <linux/clk.h> +#include <linux/kernel.h> +#include <linux/i2c.h> +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <linux/of_platform.h> +#include <linux/slab.h> +#include <media/v4l2-common.h> +#include <media/v4l2-device.h> +#include <media/v4l2-ioctl.h> +#include <media/v4l2-ctrls.h> +#include <media/v4l2-fh.h> +#include <media/v4l2-event.h> +#include <media/videobuf-dma-contig.h> + +#define DRV_NAME "fsl_viu" +#define VIU_VERSION "0.5.1" + +/* Allow building this driver with COMPILE_TEST */ +#if !defined(CONFIG_PPC) && !defined(CONFIG_MICROBLAZE) +#define out_be32(v, a) iowrite32be(a, (void __iomem *)v) +#define in_be32(a) ioread32be((void __iomem *)a) +#endif + +#define BUFFER_TIMEOUT msecs_to_jiffies(500) /* 0.5 seconds */ + +#define VIU_VID_MEM_LIMIT 4 /* Video memory limit, in Mb */ + +/* I2C address of video decoder chip is 0x4A */ +#define VIU_VIDEO_DECODER_ADDR 0x25 + +static int info_level; + +#define dprintk(level, fmt, arg...) \ + do { \ + if (level <= info_level) \ + printk(KERN_DEBUG "viu: " fmt , ## arg); \ + } while (0) + +/* + * Basic structures + */ +struct viu_fmt { + u32 fourcc; /* v4l2 format id */ + u32 pixelformat; + int depth; +}; + +static struct viu_fmt formats[] = { + { + .fourcc = V4L2_PIX_FMT_RGB565, + .pixelformat = V4L2_PIX_FMT_RGB565, + .depth = 16, + }, { + .fourcc = V4L2_PIX_FMT_RGB32, + .pixelformat = V4L2_PIX_FMT_RGB32, + .depth = 32, + } +}; + +struct viu_dev; +struct viu_buf; + +/* buffer for one video frame */ +struct viu_buf { + /* common v4l buffer stuff -- must be first */ + struct videobuf_buffer vb; + struct viu_fmt *fmt; +}; + +struct viu_dmaqueue { + struct viu_dev *dev; + struct list_head active; + struct list_head queued; + struct timer_list timeout; +}; + +struct viu_status { + u32 field_irq; + u32 vsync_irq; + u32 hsync_irq; + u32 vstart_irq; + u32 dma_end_irq; + u32 error_irq; +}; + +struct viu_reg { + u32 status_cfg; + u32 luminance; + u32 chroma_r; + u32 chroma_g; + u32 chroma_b; + u32 field_base_addr; + u32 dma_inc; + u32 picture_count; + u32 req_alarm; + u32 alpha; +} __attribute__ ((packed)); + +struct viu_dev { + struct v4l2_device v4l2_dev; + struct v4l2_ctrl_handler hdl; + struct mutex lock; + spinlock_t slock; + int users; + + struct device *dev; + /* various device info */ + struct video_device *vdev; + struct viu_dmaqueue vidq; + enum v4l2_field capfield; + int field; + int first; + int dma_done; + + /* Hardware register area */ + struct viu_reg __iomem *vr; + + /* Interrupt vector */ + int irq; + struct viu_status irqs; + + /* video overlay */ + struct v4l2_framebuffer ovbuf; + struct viu_fmt *ovfmt; + unsigned int ovenable; + enum v4l2_field ovfield; + + /* crop */ + struct v4l2_rect crop_current; + + /* clock pointer */ + struct clk *clk; + + /* decoder */ + struct v4l2_subdev *decoder; + + v4l2_std_id std; +}; + +struct viu_fh { + /* must remain the first field of this struct */ + struct v4l2_fh fh; + struct viu_dev *dev; + + /* video capture */ + struct videobuf_queue vb_vidq; + spinlock_t vbq_lock; /* spinlock for the videobuf queue */ + + /* video overlay */ + struct v4l2_window win; + struct v4l2_clip clips[1]; + + /* video capture */ + struct viu_fmt *fmt; + int width, height, sizeimage; + enum v4l2_buf_type type; +}; + +static struct viu_reg reg_val; + +/* + * Macro definitions of VIU registers + */ + +/* STATUS_CONFIG register */ +enum status_config { + SOFT_RST = 1 << 0, + + ERR_MASK = 0x0f << 4, /* Error code mask */ + ERR_NO = 0x00, /* No error */ + ERR_DMA_V = 0x01 << 4, /* DMA in vertical active */ + ERR_DMA_VB = 0x02 << 4, /* DMA in vertical blanking */ + ERR_LINE_TOO_LONG = 0x04 << 4, /* Line too long */ + ERR_TOO_MANG_LINES = 0x05 << 4, /* Too many lines in field */ + ERR_LINE_TOO_SHORT = 0x06 << 4, /* Line too short */ + ERR_NOT_ENOUGH_LINE = 0x07 << 4, /* Not enough lines in field */ + ERR_FIFO_OVERFLOW = 0x08 << 4, /* FIFO overflow */ + ERR_FIFO_UNDERFLOW = 0x09 << 4, /* FIFO underflow */ + ERR_1bit_ECC = 0x0a << 4, /* One bit ECC error */ + ERR_MORE_ECC = 0x0b << 4, /* Two/more bits ECC error */ + + INT_FIELD_EN = 0x01 << 8, /* Enable field interrupt */ + INT_VSYNC_EN = 0x01 << 9, /* Enable vsync interrupt */ + INT_HSYNC_EN = 0x01 << 10, /* Enable hsync interrupt */ + INT_VSTART_EN = 0x01 << 11, /* Enable vstart interrupt */ + INT_DMA_END_EN = 0x01 << 12, /* Enable DMA end interrupt */ + INT_ERROR_EN = 0x01 << 13, /* Enable error interrupt */ + INT_ECC_EN = 0x01 << 14, /* Enable ECC interrupt */ + + INT_FIELD_STATUS = 0x01 << 16, /* field interrupt status */ + INT_VSYNC_STATUS = 0x01 << 17, /* vsync interrupt status */ + INT_HSYNC_STATUS = 0x01 << 18, /* hsync interrupt status */ + INT_VSTART_STATUS = 0x01 << 19, /* vstart interrupt status */ + INT_DMA_END_STATUS = 0x01 << 20, /* DMA end interrupt status */ + INT_ERROR_STATUS = 0x01 << 21, /* error interrupt status */ + + DMA_ACT = 0x01 << 27, /* Enable DMA transfer */ + FIELD_NO = 0x01 << 28, /* Field number */ + DITHER_ON = 0x01 << 29, /* Dithering is on */ + ROUND_ON = 0x01 << 30, /* Round is on */ + MODE_32BIT = 0x01 << 31, /* Data in RGBa888, + * 0 in RGB565 + */ +}; + +#define norm_maxw() 720 +#define norm_maxh() 576 + +#define INT_ALL_STATUS (INT_FIELD_STATUS | INT_VSYNC_STATUS | \ + INT_HSYNC_STATUS | INT_VSTART_STATUS | \ + INT_DMA_END_STATUS | INT_ERROR_STATUS) + +#define NUM_FORMATS ARRAY_SIZE(formats) + +static irqreturn_t viu_intr(int irq, void *dev_id); + +static struct viu_fmt *format_by_fourcc(int fourcc) +{ + int i; + + for (i = 0; i < NUM_FORMATS; i++) { + if (formats[i].pixelformat == fourcc) + return formats + i; + } + + dprintk(0, "unknown pixelformat:'%4.4s'\n", (char *)&fourcc); + return NULL; +} + +static void viu_start_dma(struct viu_dev *dev) +{ + struct viu_reg __iomem *vr = dev->vr; + + dev->field = 0; + + /* Enable DMA operation */ + out_be32(&vr->status_cfg, SOFT_RST); + out_be32(&vr->status_cfg, INT_FIELD_EN); +} + +static void viu_stop_dma(struct viu_dev *dev) +{ + struct viu_reg __iomem *vr = dev->vr; + int cnt = 100; + u32 status_cfg; + + out_be32(&vr->status_cfg, 0); + + /* Clear pending interrupts */ + status_cfg = in_be32(&vr->status_cfg); + if (status_cfg & 0x3f0000) + out_be32(&vr->status_cfg, status_cfg & 0x3f0000); + + if (status_cfg & DMA_ACT) { + do { + status_cfg = in_be32(&vr->status_cfg); + if (status_cfg & INT_DMA_END_STATUS) + break; + } while (cnt--); + + if (cnt < 0) { + /* timed out, issue soft reset */ + out_be32(&vr->status_cfg, SOFT_RST); + out_be32(&vr->status_cfg, 0); + } else { + /* clear DMA_END and other pending irqs */ + out_be32(&vr->status_cfg, status_cfg & 0x3f0000); + } + } + + dev->field = 0; +} + +static int restart_video_queue(struct viu_dmaqueue *vidq) +{ + struct viu_buf *buf, *prev; + + dprintk(1, "%s vidq=%p\n", __func__, vidq); + if (!list_empty(&vidq->active)) { + buf = list_entry(vidq->active.next, struct viu_buf, vb.queue); + dprintk(2, "restart_queue [%p/%d]: restart dma\n", + buf, buf->vb.i); + + viu_stop_dma(vidq->dev); + + /* cancel all outstanding capture requests */ + list_for_each_entry_safe(buf, prev, &vidq->active, vb.queue) { + list_del(&buf->vb.queue); + buf->vb.state = VIDEOBUF_ERROR; + wake_up(&buf->vb.done); + } + mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT); + return 0; + } + + prev = NULL; + for (;;) { + if (list_empty(&vidq->queued)) + return 0; + buf = list_entry(vidq->queued.next, struct viu_buf, vb.queue); + if (prev == NULL) { + list_move_tail(&buf->vb.queue, &vidq->active); + + dprintk(1, "Restarting video dma\n"); + viu_stop_dma(vidq->dev); + viu_start_dma(vidq->dev); + + buf->vb.state = VIDEOBUF_ACTIVE; + mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT); + dprintk(2, "[%p/%d] restart_queue - first active\n", + buf, buf->vb.i); + + } else if (prev->vb.width == buf->vb.width && + prev->vb.height == buf->vb.height && + prev->fmt == buf->fmt) { + list_move_tail(&buf->vb.queue, &vidq->active); + buf->vb.state = VIDEOBUF_ACTIVE; + dprintk(2, "[%p/%d] restart_queue - move to active\n", + buf, buf->vb.i); + } else { + return 0; + } + prev = buf; + } +} + +static void viu_vid_timeout(struct timer_list *t) +{ + struct viu_dev *dev = from_timer(dev, t, vidq.timeout); + struct viu_buf *buf; + struct viu_dmaqueue *vidq = &dev->vidq; + + while (!list_empty(&vidq->active)) { + buf = list_entry(vidq->active.next, struct viu_buf, vb.queue); + list_del(&buf->vb.queue); + buf->vb.state = VIDEOBUF_ERROR; + wake_up(&buf->vb.done); + dprintk(1, "viu/0: [%p/%d] timeout\n", buf, buf->vb.i); + } + + restart_video_queue(vidq); +} + +/* + * Videobuf operations + */ +static int buffer_setup(struct videobuf_queue *vq, unsigned int *count, + unsigned int *size) +{ + struct viu_fh *fh = vq->priv_data; + + *size = fh->width * fh->height * fh->fmt->depth >> 3; + if (*count == 0) + *count = 32; + + while (*size * *count > VIU_VID_MEM_LIMIT * 1024 * 1024) + (*count)--; + + dprintk(1, "%s, count=%d, size=%d\n", __func__, *count, *size); + return 0; +} + +static void free_buffer(struct videobuf_queue *vq, struct viu_buf *buf) +{ + struct videobuf_buffer *vb = &buf->vb; + void *vaddr = NULL; + + BUG_ON(in_interrupt()); + + videobuf_waiton(vq, &buf->vb, 0, 0); + + if (vq->int_ops && vq->int_ops->vaddr) + vaddr = vq->int_ops->vaddr(vb); + + if (vaddr) + videobuf_dma_contig_free(vq, &buf->vb); + + buf->vb.state = VIDEOBUF_NEEDS_INIT; +} + +inline int buffer_activate(struct viu_dev *dev, struct viu_buf *buf) +{ + struct viu_reg __iomem *vr = dev->vr; + int bpp; + + /* setup the DMA base address */ + reg_val.field_base_addr = videobuf_to_dma_contig(&buf->vb); + + dprintk(1, "buffer_activate [%p/%d]: dma addr 0x%lx\n", + buf, buf->vb.i, (unsigned long)reg_val.field_base_addr); + + /* interlace is on by default, set horizontal DMA increment */ + reg_val.status_cfg = 0; + bpp = buf->fmt->depth >> 3; + switch (bpp) { + case 2: + reg_val.status_cfg &= ~MODE_32BIT; + reg_val.dma_inc = buf->vb.width * 2; + break; + case 4: + reg_val.status_cfg |= MODE_32BIT; + reg_val.dma_inc = buf->vb.width * 4; + break; + default: + dprintk(0, "doesn't support color depth(%d)\n", + bpp * 8); + return -EINVAL; + } + + /* setup picture_count register */ + reg_val.picture_count = (buf->vb.height / 2) << 16 | + buf->vb.width; + + reg_val.status_cfg |= DMA_ACT | INT_DMA_END_EN | INT_FIELD_EN; + + buf->vb.state = VIDEOBUF_ACTIVE; + dev->capfield = buf->vb.field; + + /* reset dma increment if needed */ + if (!V4L2_FIELD_HAS_BOTH(buf->vb.field)) + reg_val.dma_inc = 0; + + out_be32(&vr->dma_inc, reg_val.dma_inc); + out_be32(&vr->picture_count, reg_val.picture_count); + out_be32(&vr->field_base_addr, reg_val.field_base_addr); + mod_timer(&dev->vidq.timeout, jiffies + BUFFER_TIMEOUT); + return 0; +} + +static int buffer_prepare(struct videobuf_queue *vq, + struct videobuf_buffer *vb, + enum v4l2_field field) +{ + struct viu_fh *fh = vq->priv_data; + struct viu_buf *buf = container_of(vb, struct viu_buf, vb); + int rc; + + BUG_ON(fh->fmt == NULL); + + if (fh->width < 48 || fh->width > norm_maxw() || + fh->height < 32 || fh->height > norm_maxh()) + return -EINVAL; + buf->vb.size = (fh->width * fh->height * fh->fmt->depth) >> 3; + if (buf->vb.baddr != 0 && buf->vb.bsize < buf->vb.size) + return -EINVAL; + + if (buf->fmt != fh->fmt || + buf->vb.width != fh->width || + buf->vb.height != fh->height || + buf->vb.field != field) { + buf->fmt = fh->fmt; + buf->vb.width = fh->width; + buf->vb.height = fh->height; + buf->vb.field = field; + } + + if (buf->vb.state == VIDEOBUF_NEEDS_INIT) { + rc = videobuf_iolock(vq, &buf->vb, NULL); + if (rc != 0) + goto fail; + + buf->vb.width = fh->width; + buf->vb.height = fh->height; + buf->vb.field = field; + buf->fmt = fh->fmt; + } + + buf->vb.state = VIDEOBUF_PREPARED; + return 0; + +fail: + free_buffer(vq, buf); + return rc; +} + +static void buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb) +{ + struct viu_buf *buf = container_of(vb, struct viu_buf, vb); + struct viu_fh *fh = vq->priv_data; + struct viu_dev *dev = fh->dev; + struct viu_dmaqueue *vidq = &dev->vidq; + struct viu_buf *prev; + + if (!list_empty(&vidq->queued)) { + dprintk(1, "adding vb queue=%p\n", &buf->vb.queue); + dprintk(1, "vidq pointer 0x%p, queued 0x%p\n", + vidq, &vidq->queued); + dprintk(1, "dev %p, queued: self %p, next %p, head %p\n", + dev, &vidq->queued, vidq->queued.next, + vidq->queued.prev); + list_add_tail(&buf->vb.queue, &vidq->queued); + buf->vb.state = VIDEOBUF_QUEUED; + dprintk(2, "[%p/%d] buffer_queue - append to queued\n", + buf, buf->vb.i); + } else if (list_empty(&vidq->active)) { + dprintk(1, "adding vb active=%p\n", &buf->vb.queue); + list_add_tail(&buf->vb.queue, &vidq->active); + buf->vb.state = VIDEOBUF_ACTIVE; + mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT); + dprintk(2, "[%p/%d] buffer_queue - first active\n", + buf, buf->vb.i); + + buffer_activate(dev, buf); + } else { + dprintk(1, "adding vb queue2=%p\n", &buf->vb.queue); + prev = list_entry(vidq->active.prev, struct viu_buf, vb.queue); + if (prev->vb.width == buf->vb.width && + prev->vb.height == buf->vb.height && + prev->fmt == buf->fmt) { + list_add_tail(&buf->vb.queue, &vidq->active); + buf->vb.state = VIDEOBUF_ACTIVE; + dprintk(2, "[%p/%d] buffer_queue - append to active\n", + buf, buf->vb.i); + } else { + list_add_tail(&buf->vb.queue, &vidq->queued); + buf->vb.state = VIDEOBUF_QUEUED; + dprintk(2, "[%p/%d] buffer_queue - first queued\n", + buf, buf->vb.i); + } + } +} + +static void buffer_release(struct videobuf_queue *vq, + struct videobuf_buffer *vb) +{ + struct viu_buf *buf = container_of(vb, struct viu_buf, vb); + struct viu_fh *fh = vq->priv_data; + struct viu_dev *dev = (struct viu_dev *)fh->dev; + + viu_stop_dma(dev); + free_buffer(vq, buf); +} + +static const struct videobuf_queue_ops viu_video_qops = { + .buf_setup = buffer_setup, + .buf_prepare = buffer_prepare, + .buf_queue = buffer_queue, + .buf_release = buffer_release, +}; + +/* + * IOCTL vidioc handling + */ +static int vidioc_querycap(struct file *file, void *priv, + struct v4l2_capability *cap) +{ + strcpy(cap->driver, "viu"); + strcpy(cap->card, "viu"); + strcpy(cap->bus_info, "platform:viu"); + cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | + V4L2_CAP_STREAMING | + V4L2_CAP_VIDEO_OVERLAY | + V4L2_CAP_READWRITE; + cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS; + return 0; +} + +static int vidioc_enum_fmt(struct file *file, void *priv, + struct v4l2_fmtdesc *f) +{ + int index = f->index; + + if (f->index >= NUM_FORMATS) + return -EINVAL; + + f->pixelformat = formats[index].fourcc; + return 0; +} + +static int vidioc_g_fmt_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct viu_fh *fh = priv; + + f->fmt.pix.width = fh->width; + f->fmt.pix.height = fh->height; + f->fmt.pix.field = fh->vb_vidq.field; + f->fmt.pix.pixelformat = fh->fmt->pixelformat; + f->fmt.pix.bytesperline = + (f->fmt.pix.width * fh->fmt->depth) >> 3; + f->fmt.pix.sizeimage = fh->sizeimage; + f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; + return 0; +} + +static int vidioc_try_fmt_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct viu_fmt *fmt; + unsigned int maxw, maxh; + + fmt = format_by_fourcc(f->fmt.pix.pixelformat); + if (!fmt) { + dprintk(1, "Fourcc format (0x%08x) invalid.", + f->fmt.pix.pixelformat); + return -EINVAL; + } + + maxw = norm_maxw(); + maxh = norm_maxh(); + + f->fmt.pix.field = V4L2_FIELD_INTERLACED; + if (f->fmt.pix.height < 32) + f->fmt.pix.height = 32; + if (f->fmt.pix.height > maxh) + f->fmt.pix.height = maxh; + if (f->fmt.pix.width < 48) + f->fmt.pix.width = 48; + if (f->fmt.pix.width > maxw) + f->fmt.pix.width = maxw; + f->fmt.pix.width &= ~0x03; + f->fmt.pix.bytesperline = + (f->fmt.pix.width * fmt->depth) >> 3; + f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline; + f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; + + return 0; +} + +static int vidioc_s_fmt_cap(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct viu_fh *fh = priv; + int ret; + + ret = vidioc_try_fmt_cap(file, fh, f); + if (ret < 0) + return ret; + + fh->fmt = format_by_fourcc(f->fmt.pix.pixelformat); + fh->width = f->fmt.pix.width; + fh->height = f->fmt.pix.height; + fh->sizeimage = f->fmt.pix.sizeimage; + fh->vb_vidq.field = f->fmt.pix.field; + fh->type = f->type; + return 0; +} + +static int vidioc_g_fmt_overlay(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct viu_fh *fh = priv; + + f->fmt.win = fh->win; + return 0; +} + +static int verify_preview(struct viu_dev *dev, struct v4l2_window *win) +{ + enum v4l2_field field; + int maxw, maxh; + + if (dev->ovbuf.base == NULL) + return -EINVAL; + if (dev->ovfmt == NULL) + return -EINVAL; + if (win->w.width < 48 || win->w.height < 32) + return -EINVAL; + + field = win->field; + maxw = dev->crop_current.width; + maxh = dev->crop_current.height; + + if (field == V4L2_FIELD_ANY) { + field = (win->w.height > maxh/2) + ? V4L2_FIELD_INTERLACED + : V4L2_FIELD_TOP; + } + switch (field) { + case V4L2_FIELD_TOP: + case V4L2_FIELD_BOTTOM: + maxh = maxh / 2; + break; + case V4L2_FIELD_INTERLACED: + break; + default: + return -EINVAL; + } + + win->field = field; + if (win->w.width > maxw) + win->w.width = maxw; + if (win->w.height > maxh) + win->w.height = maxh; + return 0; +} + +inline void viu_activate_overlay(struct viu_reg __iomem *vr) +{ + out_be32(&vr->field_base_addr, reg_val.field_base_addr); + out_be32(&vr->dma_inc, reg_val.dma_inc); + out_be32(&vr->picture_count, reg_val.picture_count); +} + +static int viu_setup_preview(struct viu_dev *dev, struct viu_fh *fh) +{ + int bpp; + + dprintk(1, "%s %dx%d\n", __func__, + fh->win.w.width, fh->win.w.height); + + reg_val.status_cfg = 0; + + /* setup window */ + reg_val.picture_count = (fh->win.w.height / 2) << 16 | + fh->win.w.width; + + /* setup color depth and dma increment */ + bpp = dev->ovfmt->depth / 8; + switch (bpp) { + case 2: + reg_val.status_cfg &= ~MODE_32BIT; + reg_val.dma_inc = fh->win.w.width * 2; + break; + case 4: + reg_val.status_cfg |= MODE_32BIT; + reg_val.dma_inc = fh->win.w.width * 4; + break; + default: + dprintk(0, "device doesn't support color depth(%d)\n", + bpp * 8); + return -EINVAL; + } + + dev->ovfield = fh->win.field; + if (!V4L2_FIELD_HAS_BOTH(dev->ovfield)) + reg_val.dma_inc = 0; + + reg_val.status_cfg |= DMA_ACT | INT_DMA_END_EN | INT_FIELD_EN; + + /* setup the base address of the overlay buffer */ + reg_val.field_base_addr = (u32)(long)dev->ovbuf.base; + + return 0; +} + +static int vidioc_s_fmt_overlay(struct file *file, void *priv, + struct v4l2_format *f) +{ + struct viu_fh *fh = priv; + struct viu_dev *dev = (struct viu_dev *)fh->dev; + unsigned long flags; + int err; + + err = verify_preview(dev, &f->fmt.win); + if (err) + return err; + + fh->win = f->fmt.win; + + spin_lock_irqsave(&dev->slock, flags); + viu_setup_preview(dev, fh); + spin_unlock_irqrestore(&dev->slock, flags); + return 0; +} + +static int vidioc_try_fmt_overlay(struct file *file, void *priv, + struct v4l2_format *f) +{ + return 0; +} + +static int vidioc_overlay(struct file *file, void *priv, unsigned int on) +{ + struct viu_fh *fh = priv; + struct viu_dev *dev = (struct viu_dev *)fh->dev; + unsigned long flags; + + if (on) { + spin_lock_irqsave(&dev->slock, flags); + viu_activate_overlay(dev->vr); + dev->ovenable = 1; + + /* start dma */ + viu_start_dma(dev); + spin_unlock_irqrestore(&dev->slock, flags); + } else { + viu_stop_dma(dev); + dev->ovenable = 0; + } + + return 0; +} + +static int vidioc_g_fbuf(struct file *file, void *priv, struct v4l2_framebuffer *arg) +{ + struct viu_fh *fh = priv; + struct viu_dev *dev = fh->dev; + struct v4l2_framebuffer *fb = arg; + + *fb = dev->ovbuf; + fb->capability = V4L2_FBUF_CAP_LIST_CLIPPING; + return 0; +} + +static int vidioc_s_fbuf(struct file *file, void *priv, const struct v4l2_framebuffer *arg) +{ + struct viu_fh *fh = priv; + struct viu_dev *dev = fh->dev; + const struct v4l2_framebuffer *fb = arg; + struct viu_fmt *fmt; + + if (!capable(CAP_SYS_ADMIN) && !capable(CAP_SYS_RAWIO)) + return -EPERM; + + /* check args */ + fmt = format_by_fourcc(fb->fmt.pixelformat); + if (fmt == NULL) + return -EINVAL; + + /* ok, accept it */ + dev->ovbuf = *fb; + dev->ovfmt = fmt; + if (dev->ovbuf.fmt.bytesperline == 0) { + dev->ovbuf.fmt.bytesperline = + dev->ovbuf.fmt.width * fmt->depth / 8; + } + return 0; +} + +static int vidioc_reqbufs(struct file *file, void *priv, + struct v4l2_requestbuffers *p) +{ + struct viu_fh *fh = priv; + + return videobuf_reqbufs(&fh->vb_vidq, p); +} + +static int vidioc_querybuf(struct file *file, void *priv, + struct v4l2_buffer *p) +{ + struct viu_fh *fh = priv; + + return videobuf_querybuf(&fh->vb_vidq, p); +} + +static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *p) +{ + struct viu_fh *fh = priv; + + return videobuf_qbuf(&fh->vb_vidq, p); +} + +static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p) +{ + struct viu_fh *fh = priv; + + return videobuf_dqbuf(&fh->vb_vidq, p, + file->f_flags & O_NONBLOCK); +} + +static int vidioc_streamon(struct file *file, void *priv, enum v4l2_buf_type i) +{ + struct viu_fh *fh = priv; + struct viu_dev *dev = fh->dev; + + if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + if (fh->type != i) + return -EINVAL; + + if (dev->ovenable) + dev->ovenable = 0; + + viu_start_dma(fh->dev); + + return videobuf_streamon(&fh->vb_vidq); +} + +static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i) +{ + struct viu_fh *fh = priv; + + if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + if (fh->type != i) + return -EINVAL; + + viu_stop_dma(fh->dev); + + return videobuf_streamoff(&fh->vb_vidq); +} + +#define decoder_call(viu, o, f, args...) \ + v4l2_subdev_call(viu->decoder, o, f, ##args) + +static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std_id) +{ + struct viu_fh *fh = priv; + + decoder_call(fh->dev, video, querystd, std_id); + return 0; +} + +static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id id) +{ + struct viu_fh *fh = priv; + + fh->dev->std = id; + decoder_call(fh->dev, video, s_std, id); + return 0; +} + +static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std_id) +{ + struct viu_fh *fh = priv; + + *std_id = fh->dev->std; + return 0; +} + +/* only one input in this driver */ +static int vidioc_enum_input(struct file *file, void *priv, + struct v4l2_input *inp) +{ + struct viu_fh *fh = priv; + + if (inp->index != 0) + return -EINVAL; + + inp->type = V4L2_INPUT_TYPE_CAMERA; + inp->std = fh->dev->vdev->tvnorms; + strcpy(inp->name, "Camera"); + return 0; +} + +static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) +{ + *i = 0; + return 0; +} + +static int vidioc_s_input(struct file *file, void *priv, unsigned int i) +{ + struct viu_fh *fh = priv; + + if (i) + return -EINVAL; + + decoder_call(fh->dev, video, s_routing, i, 0, 0); + return 0; +} + +inline void viu_activate_next_buf(struct viu_dev *dev, + struct viu_dmaqueue *viuq) +{ + struct viu_dmaqueue *vidq = viuq; + struct viu_buf *buf; + + /* launch another DMA operation for an active/queued buffer */ + if (!list_empty(&vidq->active)) { + buf = list_entry(vidq->active.next, struct viu_buf, + vb.queue); + dprintk(1, "start another queued buffer: 0x%p\n", buf); + buffer_activate(dev, buf); + } else if (!list_empty(&vidq->queued)) { + buf = list_entry(vidq->queued.next, struct viu_buf, + vb.queue); + list_del(&buf->vb.queue); + + dprintk(1, "start another queued buffer: 0x%p\n", buf); + list_add_tail(&buf->vb.queue, &vidq->active); + buf->vb.state = VIDEOBUF_ACTIVE; + buffer_activate(dev, buf); + } +} + +inline void viu_default_settings(struct viu_reg __iomem *vr) +{ + out_be32(&vr->luminance, 0x9512A254); + out_be32(&vr->chroma_r, 0x03310000); + out_be32(&vr->chroma_g, 0x06600F38); + out_be32(&vr->chroma_b, 0x00000409); + out_be32(&vr->alpha, 0x000000ff); + out_be32(&vr->req_alarm, 0x00000090); + dprintk(1, "status reg: 0x%08x, field base: 0x%08x\n", + in_be32(&vr->status_cfg), in_be32(&vr->field_base_addr)); +} + +static void viu_overlay_intr(struct viu_dev *dev, u32 status) +{ + struct viu_reg __iomem *vr = dev->vr; + + if (status & INT_DMA_END_STATUS) + dev->dma_done = 1; + + if (status & INT_FIELD_STATUS) { + if (dev->dma_done) { + u32 addr = reg_val.field_base_addr; + + dev->dma_done = 0; + if (status & FIELD_NO) + addr += reg_val.dma_inc; + + out_be32(&vr->field_base_addr, addr); + out_be32(&vr->dma_inc, reg_val.dma_inc); + out_be32(&vr->status_cfg, + (status & 0xffc0ffff) | + (status & INT_ALL_STATUS) | + reg_val.status_cfg); + } else if (status & INT_VSYNC_STATUS) { + out_be32(&vr->status_cfg, + (status & 0xffc0ffff) | + (status & INT_ALL_STATUS) | + reg_val.status_cfg); + } + } +} + +static void viu_capture_intr(struct viu_dev *dev, u32 status) +{ + struct viu_dmaqueue *vidq = &dev->vidq; + struct viu_reg __iomem *vr = dev->vr; + struct viu_buf *buf; + int field_num; + int need_two; + int dma_done = 0; + + field_num = status & FIELD_NO; + need_two = V4L2_FIELD_HAS_BOTH(dev->capfield); + + if (status & INT_DMA_END_STATUS) { + dma_done = 1; + if (((field_num == 0) && (dev->field == 0)) || + (field_num && (dev->field == 1))) + dev->field++; + } + + if (status & INT_FIELD_STATUS) { + dprintk(1, "irq: field %d, done %d\n", + !!field_num, dma_done); + if (unlikely(dev->first)) { + if (field_num == 0) { + dev->first = 0; + dprintk(1, "activate first buf\n"); + viu_activate_next_buf(dev, vidq); + } else + dprintk(1, "wait field 0\n"); + return; + } + + /* setup buffer address for next dma operation */ + if (!list_empty(&vidq->active)) { + u32 addr = reg_val.field_base_addr; + + if (field_num && need_two) { + addr += reg_val.dma_inc; + dprintk(1, "field 1, 0x%lx, dev field %d\n", + (unsigned long)addr, dev->field); + } + out_be32(&vr->field_base_addr, addr); + out_be32(&vr->dma_inc, reg_val.dma_inc); + out_be32(&vr->status_cfg, + (status & 0xffc0ffff) | + (status & INT_ALL_STATUS) | + reg_val.status_cfg); + return; + } + } + + if (dma_done && field_num && (dev->field == 2)) { + dev->field = 0; + buf = list_entry(vidq->active.next, + struct viu_buf, vb.queue); + dprintk(1, "viu/0: [%p/%d] 0x%lx/0x%lx: dma complete\n", + buf, buf->vb.i, + (unsigned long)videobuf_to_dma_contig(&buf->vb), + (unsigned long)in_be32(&vr->field_base_addr)); + + if (waitqueue_active(&buf->vb.done)) { + list_del(&buf->vb.queue); + v4l2_get_timestamp(&buf->vb.ts); + buf->vb.state = VIDEOBUF_DONE; + buf->vb.field_count++; + wake_up(&buf->vb.done); + } + /* activate next dma buffer */ + viu_activate_next_buf(dev, vidq); + } +} + +static irqreturn_t viu_intr(int irq, void *dev_id) +{ + struct viu_dev *dev = (struct viu_dev *)dev_id; + struct viu_reg __iomem *vr = dev->vr; + u32 status; + u32 error; + + status = in_be32(&vr->status_cfg); + + if (status & INT_ERROR_STATUS) { + dev->irqs.error_irq++; + error = status & ERR_MASK; + if (error) + dprintk(1, "Err: error(%d), times:%d!\n", + error >> 4, dev->irqs.error_irq); + /* Clear interrupt error bit and error flags */ + out_be32(&vr->status_cfg, + (status & 0xffc0ffff) | INT_ERROR_STATUS); + } + + if (status & INT_DMA_END_STATUS) { + dev->irqs.dma_end_irq++; + dev->dma_done = 1; + dprintk(2, "VIU DMA end interrupt times: %d\n", + dev->irqs.dma_end_irq); + } + + if (status & INT_HSYNC_STATUS) + dev->irqs.hsync_irq++; + + if (status & INT_FIELD_STATUS) { + dev->irqs.field_irq++; + dprintk(2, "VIU field interrupt times: %d\n", + dev->irqs.field_irq); + } + + if (status & INT_VSTART_STATUS) + dev->irqs.vstart_irq++; + + if (status & INT_VSYNC_STATUS) { + dev->irqs.vsync_irq++; + dprintk(2, "VIU vsync interrupt times: %d\n", + dev->irqs.vsync_irq); + } + + /* clear all pending irqs */ + status = in_be32(&vr->status_cfg); + out_be32(&vr->status_cfg, + (status & 0xffc0ffff) | (status & INT_ALL_STATUS)); + + if (dev->ovenable) { + viu_overlay_intr(dev, status); + return IRQ_HANDLED; + } + + /* Capture mode */ + viu_capture_intr(dev, status); + return IRQ_HANDLED; +} + +/* + * File operations for the device + */ +static int viu_open(struct file *file) +{ + struct video_device *vdev = video_devdata(file); + struct viu_dev *dev = video_get_drvdata(vdev); + struct viu_fh *fh; + struct viu_reg __iomem *vr; + int minor = vdev->minor; + u32 status_cfg; + + dprintk(1, "viu: open (minor=%d)\n", minor); + + dev->users++; + if (dev->users > 1) { + dev->users--; + return -EBUSY; + } + + vr = dev->vr; + + dprintk(1, "open minor=%d type=%s users=%d\n", minor, + v4l2_type_names[V4L2_BUF_TYPE_VIDEO_CAPTURE], dev->users); + + if (mutex_lock_interruptible(&dev->lock)) { + dev->users--; + return -ERESTARTSYS; + } + + /* allocate and initialize per filehandle data */ + fh = kzalloc(sizeof(*fh), GFP_KERNEL); + if (!fh) { + dev->users--; + mutex_unlock(&dev->lock); + return -ENOMEM; + } + + v4l2_fh_init(&fh->fh, vdev); + file->private_data = fh; + fh->dev = dev; + + fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + fh->fmt = format_by_fourcc(V4L2_PIX_FMT_RGB32); + fh->width = norm_maxw(); + fh->height = norm_maxh(); + dev->crop_current.width = fh->width; + dev->crop_current.height = fh->height; + + dprintk(1, "Open: fh=%p, dev=%p, dev->vidq=%p\n", fh, dev, &dev->vidq); + dprintk(1, "Open: list_empty queued=%d\n", + list_empty(&dev->vidq.queued)); + dprintk(1, "Open: list_empty active=%d\n", + list_empty(&dev->vidq.active)); + + viu_default_settings(vr); + + status_cfg = in_be32(&vr->status_cfg); + out_be32(&vr->status_cfg, + status_cfg & ~(INT_VSYNC_EN | INT_HSYNC_EN | + INT_FIELD_EN | INT_VSTART_EN | + INT_DMA_END_EN | INT_ERROR_EN | INT_ECC_EN)); + + status_cfg = in_be32(&vr->status_cfg); + out_be32(&vr->status_cfg, status_cfg | INT_ALL_STATUS); + + spin_lock_init(&fh->vbq_lock); + videobuf_queue_dma_contig_init(&fh->vb_vidq, &viu_video_qops, + dev->dev, &fh->vbq_lock, + fh->type, V4L2_FIELD_INTERLACED, + sizeof(struct viu_buf), fh, + &fh->dev->lock); + v4l2_fh_add(&fh->fh); + mutex_unlock(&dev->lock); + return 0; +} + +static ssize_t viu_read(struct file *file, char __user *data, size_t count, + loff_t *ppos) +{ + struct viu_fh *fh = file->private_data; + struct viu_dev *dev = fh->dev; + int ret = 0; + + dprintk(2, "%s\n", __func__); + if (dev->ovenable) + dev->ovenable = 0; + + if (fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) { + if (mutex_lock_interruptible(&dev->lock)) + return -ERESTARTSYS; + viu_start_dma(dev); + ret = videobuf_read_stream(&fh->vb_vidq, data, count, + ppos, 0, file->f_flags & O_NONBLOCK); + mutex_unlock(&dev->lock); + return ret; + } + return 0; +} + +static __poll_t viu_poll(struct file *file, struct poll_table_struct *wait) +{ + struct viu_fh *fh = file->private_data; + struct videobuf_queue *q = &fh->vb_vidq; + struct viu_dev *dev = fh->dev; + __poll_t req_events = poll_requested_events(wait); + __poll_t res = v4l2_ctrl_poll(file, wait); + + if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type) + return EPOLLERR; + + if (!(req_events & (EPOLLIN | EPOLLRDNORM))) + return res; + + mutex_lock(&dev->lock); + res |= videobuf_poll_stream(file, q, wait); + mutex_unlock(&dev->lock); + return res; +} + +static int viu_release(struct file *file) +{ + struct viu_fh *fh = file->private_data; + struct viu_dev *dev = fh->dev; + int minor = video_devdata(file)->minor; + + mutex_lock(&dev->lock); + viu_stop_dma(dev); + videobuf_stop(&fh->vb_vidq); + videobuf_mmap_free(&fh->vb_vidq); + v4l2_fh_del(&fh->fh); + v4l2_fh_exit(&fh->fh); + mutex_unlock(&dev->lock); + + kfree(fh); + + dev->users--; + dprintk(1, "close (minor=%d, users=%d)\n", + minor, dev->users); + return 0; +} + +static void viu_reset(struct viu_reg __iomem *reg) +{ + out_be32(®->status_cfg, 0); + out_be32(®->luminance, 0x9512a254); + out_be32(®->chroma_r, 0x03310000); + out_be32(®->chroma_g, 0x06600f38); + out_be32(®->chroma_b, 0x00000409); + out_be32(®->field_base_addr, 0); + out_be32(®->dma_inc, 0); + out_be32(®->picture_count, 0x01e002d0); + out_be32(®->req_alarm, 0x00000090); + out_be32(®->alpha, 0x000000ff); +} + +static int viu_mmap(struct file *file, struct vm_area_struct *vma) +{ + struct viu_fh *fh = file->private_data; + struct viu_dev *dev = fh->dev; + int ret; + + dprintk(1, "mmap called, vma=%p\n", vma); + + if (mutex_lock_interruptible(&dev->lock)) + return -ERESTARTSYS; + ret = videobuf_mmap_mapper(&fh->vb_vidq, vma); + mutex_unlock(&dev->lock); + + dprintk(1, "vma start=0x%08lx, size=%ld, ret=%d\n", + (unsigned long)vma->vm_start, + (unsigned long)vma->vm_end-(unsigned long)vma->vm_start, + ret); + + return ret; +} + +static const struct v4l2_file_operations viu_fops = { + .owner = THIS_MODULE, + .open = viu_open, + .release = viu_release, + .read = viu_read, + .poll = viu_poll, + .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */ + .mmap = viu_mmap, +}; + +static const struct v4l2_ioctl_ops viu_ioctl_ops = { + .vidioc_querycap = vidioc_querycap, + .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt, + .vidioc_g_fmt_vid_cap = vidioc_g_fmt_cap, + .vidioc_try_fmt_vid_cap = vidioc_try_fmt_cap, + .vidioc_s_fmt_vid_cap = vidioc_s_fmt_cap, + .vidioc_enum_fmt_vid_overlay = vidioc_enum_fmt, + .vidioc_g_fmt_vid_overlay = vidioc_g_fmt_overlay, + .vidioc_try_fmt_vid_overlay = vidioc_try_fmt_overlay, + .vidioc_s_fmt_vid_overlay = vidioc_s_fmt_overlay, + .vidioc_overlay = vidioc_overlay, + .vidioc_g_fbuf = vidioc_g_fbuf, + .vidioc_s_fbuf = vidioc_s_fbuf, + .vidioc_reqbufs = vidioc_reqbufs, + .vidioc_querybuf = vidioc_querybuf, + .vidioc_qbuf = vidioc_qbuf, + .vidioc_dqbuf = vidioc_dqbuf, + .vidioc_g_std = vidioc_g_std, + .vidioc_s_std = vidioc_s_std, + .vidioc_querystd = vidioc_querystd, + .vidioc_enum_input = vidioc_enum_input, + .vidioc_g_input = vidioc_g_input, + .vidioc_s_input = vidioc_s_input, + .vidioc_streamon = vidioc_streamon, + .vidioc_streamoff = vidioc_streamoff, + .vidioc_log_status = v4l2_ctrl_log_status, + .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, + .vidioc_unsubscribe_event = v4l2_event_unsubscribe, +}; + +static const struct video_device viu_template = { + .name = "FSL viu", + .fops = &viu_fops, + .minor = -1, + .ioctl_ops = &viu_ioctl_ops, + .release = video_device_release, + + .tvnorms = V4L2_STD_NTSC_M | V4L2_STD_PAL, +}; + +static int viu_of_probe(struct platform_device *op) +{ + struct viu_dev *viu_dev; + struct video_device *vdev; + struct resource r; + struct viu_reg __iomem *viu_regs; + struct i2c_adapter *ad; + int ret, viu_irq; + struct clk *clk; + + ret = of_address_to_resource(op->dev.of_node, 0, &r); + if (ret) { + dev_err(&op->dev, "Can't parse device node resource\n"); + return -ENODEV; + } + + viu_irq = irq_of_parse_and_map(op->dev.of_node, 0); + if (!viu_irq) { + dev_err(&op->dev, "Error while mapping the irq\n"); + return -EINVAL; + } + + /* request mem region */ + if (!devm_request_mem_region(&op->dev, r.start, + sizeof(struct viu_reg), DRV_NAME)) { + dev_err(&op->dev, "Error while requesting mem region\n"); + ret = -EBUSY; + goto err_irq; + } + + /* remap registers */ + viu_regs = devm_ioremap(&op->dev, r.start, sizeof(struct viu_reg)); + if (!viu_regs) { + dev_err(&op->dev, "Can't map register set\n"); + ret = -ENOMEM; + goto err_irq; + } + + /* Prepare our private structure */ + viu_dev = devm_kzalloc(&op->dev, sizeof(struct viu_dev), GFP_ATOMIC); + if (!viu_dev) { + dev_err(&op->dev, "Can't allocate private structure\n"); + ret = -ENOMEM; + goto err_irq; + } + + viu_dev->vr = viu_regs; + viu_dev->irq = viu_irq; + viu_dev->dev = &op->dev; + + /* init video dma queues */ + INIT_LIST_HEAD(&viu_dev->vidq.active); + INIT_LIST_HEAD(&viu_dev->vidq.queued); + + snprintf(viu_dev->v4l2_dev.name, + sizeof(viu_dev->v4l2_dev.name), "%s", "VIU"); + ret = v4l2_device_register(viu_dev->dev, &viu_dev->v4l2_dev); + if (ret < 0) { + dev_err(&op->dev, "v4l2_device_register() failed: %d\n", ret); + goto err_irq; + } + + ad = i2c_get_adapter(0); + if (!ad) { + ret = -EFAULT; + dev_err(&op->dev, "couldn't get i2c adapter\n"); + goto err_v4l2; + } + + v4l2_ctrl_handler_init(&viu_dev->hdl, 5); + if (viu_dev->hdl.error) { + ret = viu_dev->hdl.error; + dev_err(&op->dev, "couldn't register control\n"); + goto err_i2c; + } + /* This control handler will inherit the control(s) from the + sub-device(s). */ + viu_dev->v4l2_dev.ctrl_handler = &viu_dev->hdl; + viu_dev->decoder = v4l2_i2c_new_subdev(&viu_dev->v4l2_dev, ad, + "saa7113", VIU_VIDEO_DECODER_ADDR, NULL); + + timer_setup(&viu_dev->vidq.timeout, viu_vid_timeout, 0); + viu_dev->std = V4L2_STD_NTSC_M; + viu_dev->first = 1; + + /* Allocate memory for video device */ + vdev = video_device_alloc(); + if (vdev == NULL) { + ret = -ENOMEM; + goto err_hdl; + } + + *vdev = viu_template; + + vdev->v4l2_dev = &viu_dev->v4l2_dev; + + viu_dev->vdev = vdev; + + /* initialize locks */ + mutex_init(&viu_dev->lock); + viu_dev->vdev->lock = &viu_dev->lock; + spin_lock_init(&viu_dev->slock); + + video_set_drvdata(viu_dev->vdev, viu_dev); + + mutex_lock(&viu_dev->lock); + + ret = video_register_device(viu_dev->vdev, VFL_TYPE_GRABBER, -1); + if (ret < 0) { + video_device_release(viu_dev->vdev); + goto err_unlock; + } + + /* enable VIU clock */ + clk = devm_clk_get(&op->dev, "ipg"); + if (IS_ERR(clk)) { + dev_err(&op->dev, "failed to lookup the clock!\n"); + ret = PTR_ERR(clk); + goto err_vdev; + } + ret = clk_prepare_enable(clk); + if (ret) { + dev_err(&op->dev, "failed to enable the clock!\n"); + goto err_vdev; + } + viu_dev->clk = clk; + + /* reset VIU module */ + viu_reset(viu_dev->vr); + + /* install interrupt handler */ + if (request_irq(viu_dev->irq, viu_intr, 0, "viu", (void *)viu_dev)) { + dev_err(&op->dev, "Request VIU IRQ failed.\n"); + ret = -ENODEV; + goto err_clk; + } + + mutex_unlock(&viu_dev->lock); + + dev_info(&op->dev, "Freescale VIU Video Capture Board\n"); + return ret; + +err_clk: + clk_disable_unprepare(viu_dev->clk); +err_vdev: + video_unregister_device(viu_dev->vdev); +err_unlock: + mutex_unlock(&viu_dev->lock); +err_hdl: + v4l2_ctrl_handler_free(&viu_dev->hdl); +err_i2c: + i2c_put_adapter(ad); +err_v4l2: + v4l2_device_unregister(&viu_dev->v4l2_dev); +err_irq: + irq_dispose_mapping(viu_irq); + return ret; +} + +static int viu_of_remove(struct platform_device *op) +{ + struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev); + struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev); + struct v4l2_subdev *sdev = list_entry(v4l2_dev->subdevs.next, + struct v4l2_subdev, list); + struct i2c_client *client = v4l2_get_subdevdata(sdev); + + free_irq(dev->irq, (void *)dev); + irq_dispose_mapping(dev->irq); + + clk_disable_unprepare(dev->clk); + + v4l2_ctrl_handler_free(&dev->hdl); + video_unregister_device(dev->vdev); + i2c_put_adapter(client->adapter); + v4l2_device_unregister(&dev->v4l2_dev); + return 0; +} + +#ifdef CONFIG_PM +static int viu_suspend(struct platform_device *op, pm_message_t state) +{ + struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev); + struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev); + + clk_disable(dev->clk); + return 0; +} + +static int viu_resume(struct platform_device *op) +{ + struct v4l2_device *v4l2_dev = dev_get_drvdata(&op->dev); + struct viu_dev *dev = container_of(v4l2_dev, struct viu_dev, v4l2_dev); + + clk_enable(dev->clk); + return 0; +} +#endif + +/* + * Initialization and module stuff + */ +static const struct of_device_id mpc512x_viu_of_match[] = { + { + .compatible = "fsl,mpc5121-viu", + }, + {}, +}; +MODULE_DEVICE_TABLE(of, mpc512x_viu_of_match); + +static struct platform_driver viu_of_platform_driver = { + .probe = viu_of_probe, + .remove = viu_of_remove, +#ifdef CONFIG_PM + .suspend = viu_suspend, + .resume = viu_resume, +#endif + .driver = { + .name = DRV_NAME, + .of_match_table = mpc512x_viu_of_match, + }, +}; + +module_platform_driver(viu_of_platform_driver); + +MODULE_DESCRIPTION("Freescale Video-In(VIU)"); +MODULE_AUTHOR("Hongjun Chen"); +MODULE_LICENSE("GPL"); +MODULE_VERSION(VIU_VERSION); |