static void free_buffer(struct videobuf_queue *vq, struct pxa_buffer *buf)
{
struct soc_camera_device *icd = vq->priv_data;
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb);
int i;
BUG_ON(in_interrupt());
dev_dbg(icd->parent, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
&buf->vb, buf->vb.baddr, buf->vb.bsize);
/*
* This waits until this buffer is out of danger, i.e., until it is no
* longer in STATE_QUEUED or STATE_ACTIVE
*/
videobuf_waiton(vq, &buf->vb, 0, 0);
videobuf_dma_unmap(vq->dev, dma);
videobuf_dma_free(dma);
for (i = 0; i < ARRAY_SIZE(buf->dmas); i++) {
if (buf->dmas[i].sg_cpu)
dma_free_coherent(ici->v4l2_dev.dev,
buf->dmas[i].sg_size,
buf->dmas[i].sg_cpu,
buf->dmas[i].sg_dma);
buf->dmas[i].sg_cpu = NULL;
}
buf->vb.state = VIDEOBUF_NEEDS_INIT;
}
/**
* previewer_vbq_release - Videobuffer queue release
* @q: Structure containing the videobuffer queue.
* @vb: Structure containing the videobuffer used for previewer processing.
**/
static void previewer_vbq_release(struct videobuf_queue *q,
struct videobuf_buffer *vb)
{
struct prev_fh *fh = q->priv_data;
struct prev_device *device = fh->device;
if (q->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
ispmmu_unmap(device->isp_addr_read);
device->isp_addr_read = 0;
spin_lock(&device->inout_vbq_lock);
vb->state = VIDEOBUF_NEEDS_INIT;
spin_unlock(&device->inout_vbq_lock);
} else if (q->type == V4L2_BUF_TYPE_PRIVATE) {
ispmmu_unmap(device->isp_addr_lsc);
device->isp_addr_lsc = 0;
spin_lock(&device->lsc_vbq_lock);
vb->state = VIDEOBUF_NEEDS_INIT;
spin_unlock(&device->lsc_vbq_lock);
}
if (vb->memory != V4L2_MEMORY_MMAP) {
videobuf_dma_unmap(q, videobuf_to_dma(vb));
videobuf_dma_free(videobuf_to_dma(vb));
}
dev_dbg(prev_dev, "previewer_vbq_release\n");
}
int videobuf_sg_dma_unmap(struct device *dev, struct videobuf_dmabuf *dma)
{
struct videobuf_queue q;
q.dev = dev;
return videobuf_dma_unmap(&q, dma);
}
int videobuf_pci_dma_unmap(struct pci_dev *pci,struct videobuf_dmabuf *dma)
{
struct videobuf_queue q;
q.dev=pci;
return (videobuf_dma_unmap(&q,dma));
}
void saa7134_dma_free(struct videobuf_queue *q,struct saa7134_buf *buf)
{
BUG_ON(in_interrupt());
videobuf_waiton(&buf->vb,0,0);
videobuf_dma_unmap(q, &buf->vb.dma);
videobuf_dma_free(&buf->vb.dma);
buf->vb.state = STATE_NEEDS_INIT;
}
void saa7134_dma_free(struct videobuf_queue *q,struct saa7134_buf *buf)
{
struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
BUG_ON(in_interrupt());
videobuf_waiton(&buf->vb,0,0);
videobuf_dma_unmap(q, dma);
videobuf_dma_free(dma);
buf->vb.state = VIDEOBUF_NEEDS_INIT;
}
void
cx88_free_buffer(struct videobuf_queue *q, struct cx88_buffer *buf)
{
struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
BUG_ON(in_interrupt());
videobuf_waiton(q, &buf->vb, 0, 0);
videobuf_dma_unmap(q->dev, dma);
videobuf_dma_free(dma);
btcx_riscmem_free(to_pci_dev(q->dev), &buf->risc);
buf->vb.state = VIDEOBUF_NEEDS_INIT;
}
void saa7146_dma_free(struct saa7146_dev *dev,struct videobuf_queue *q,
struct saa7146_buf *buf)
{
struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
DEB_EE(("dev:%p, buf:%p\n",dev,buf));
BUG_ON(in_interrupt());
videobuf_waiton(&buf->vb,0,0);
videobuf_dma_unmap(q, dma);
videobuf_dma_free(dma);
buf->vb.state = VIDEOBUF_NEEDS_INIT;
}
void tw68_dma_free(struct videobuf_queue *q, struct tw68_buf *buf)
{
struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb);
if (core_debug & DBG_FLOW)
printk(KERN_DEBUG "%s: called\n", __func__);
BUG_ON(in_interrupt());
#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,36)
videobuf_waiton(&buf->vb, 0, 0);
#else
videobuf_waiton(q, &buf->vb, 0, 0);
#endif
#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,35)
videobuf_dma_unmap(q, dma);
#else
videobuf_dma_unmap(q->dev, dma);
#endif
videobuf_dma_free(dma);
/* if no risc area allocated, btcx_riscmem_free just returns */
btcx_riscmem_free(to_pci_dev(q->dev), &buf->risc);
buf->vb.state = VIDEOBUF_NEEDS_INIT;
}
static int dsp_buffer_free(struct cx23885_audio_dev *chip)
{
BUG_ON(!chip->dma_size);
dprintk(2, "Freeing buffer\n");
videobuf_dma_unmap(&chip->pci->dev, chip->dma_risc);
videobuf_dma_free(chip->dma_risc);
btcx_riscmem_free(chip->pci, &chip->buf->risc);
kfree(chip->buf);
chip->dma_risc = NULL;
chip->dma_size = 0;
return 0;
}
static void omap24xxcam_vbq_release(struct videobuf_queue *vbq,
struct videobuf_buffer *vb)
{
struct videobuf_dmabuf *dma = videobuf_to_dma(vb);
/* wait for buffer, especially to get out of the sgdma queue */
videobuf_waiton(vbq, vb, 0, 0);
if (vb->memory == V4L2_MEMORY_MMAP) {
dma_unmap_sg(vbq->dev, dma->sglist, dma->sglen,
dma->direction);
dma->direction = DMA_NONE;
} else {
videobuf_dma_unmap(vbq->dev, videobuf_to_dma(vb));
videobuf_dma_free(videobuf_to_dma(vb));
}
vb->state = VIDEOBUF_NEEDS_INIT;
}
static void usbcam_videobuf_free(struct videobuf_queue *vq,
struct usbcam_frame *framep)
{
struct videobuf_dmabuf *dma = usbframe_get_dmabuf(&framep->vbb);
videobuf_waiton(&framep->vbb, 0, 0);
videobuf_dma_unmap(vq, dma);
videobuf_dma_free(dma);
if (framep->vbb.state != STATE_NEEDS_INIT) {
if (framep->vmap_base) {
vunmap(framep->vmap_base);
framep->vmap_base = NULL;
framep->vmap_sof = NULL;
}
assert(list_empty(&framep->cap_links));
framep->vbb.state = STATE_NEEDS_INIT;
}
}
static void free_buffer(struct videobuf_queue *vq, struct omap1_cam_buf *buf,
enum omap1_cam_vb_mode vb_mode)
{
struct videobuf_buffer *vb = &buf->vb;
BUG_ON(in_interrupt());
videobuf_waiton(vq, vb, 0, 0);
if (vb_mode == OMAP1_CAM_DMA_CONTIG) {
videobuf_dma_contig_free(vq, vb);
} else {
struct soc_camera_device *icd = vq->priv_data;
struct device *dev = icd->dev.parent;
struct videobuf_dmabuf *dma = videobuf_to_dma(vb);
videobuf_dma_unmap(dev, dma);
videobuf_dma_free(dma);
}
vb->state = VIDEOBUF_NEEDS_INIT;
}
/**
* prev2resz_vbq_release - Videobuffer queue release
*/
static void prev2resz_vbq_release(struct videobuf_queue *q,
struct videobuf_buffer *vb)
{
struct prev2resz_fhdl *fhdl = q->priv_data;
if (q->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
ispmmu_vunmap(fhdl->isp, fhdl->dst_buff_addr);
fhdl->dst_buff_addr = 0;
spin_lock(&fhdl->dst_vbq_lock);
vb->state = VIDEOBUF_NEEDS_INIT;
spin_unlock(&fhdl->dst_vbq_lock);
} else if (q->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
ispmmu_vunmap(fhdl->isp, fhdl->src_buff_addr);
fhdl->src_buff_addr = 0;
spin_lock(&fhdl->src_vbq_lock);
vb->state = VIDEOBUF_NEEDS_INIT;
spin_unlock(&fhdl->src_vbq_lock);
}
if (vb->memory != V4L2_MEMORY_MMAP) {
videobuf_dma_unmap(q, videobuf_to_dma(vb));
videobuf_dma_free(videobuf_to_dma(vb));
}
}
int tw686x_audio_create(struct tw686x_adev *dev)
{
unsigned int period_size, periods;
int err;
daprintk(DPRT_LEVEL0, dev, "%s()\n", __func__);
mutex_init(&dev->lock);
period_size = TW686X_AUDIO_PERIOD_SIZE; //固定为4096
periods = 4; //最小为2
daprintk(DPRT_LEVEL0, dev, "%s(bufsize=%d)\n", __func__, period_size * periods);
dev->blocks = periods;
dev->blksize = period_size;
dev->bufsize = period_size * periods;
dev->period_idx = 0;
dev->read_offset = 0;
dev->substream = NULL;
dev->card = NULL;
err = tw686x_audio_buffer_init(dev);
if (0 != err) {
dev->blocks = 0;
dev->blksize = 0;
dev->bufsize = 0;
return err;
}
#if(LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32))
if (0 != (err = videobuf_dma_map(&dev->chip->pci->dev, &dev->dma))) {
#else
if (0 != (err = videobuf_sg_dma_map(&dev->chip->pci->dev, &dev->dma))) {
#endif
tw686x_audio_buffer_free(dev);
return err;
}
daprintk(DPRT_LEVEL0, dev, "%s_%d: period_size %d, periods %d, sglen %d.\n",
__func__,
dev->channel_id,
period_size,
periods,
dev->dma.sglen);
return 0;
}
int tw686x_audio_free(struct tw686x_adev *dev)
{
if (dev->substream != NULL) {
#if(LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32))
videobuf_dma_unmap(&dev->chip->pci->dev, &dev->dma);
#else
videobuf_sg_dma_unmap(&dev->chip->pci->dev, &dev->dma);
#endif
tw686x_audio_buffer_free(dev);
dev->substream = NULL;
}
return 0;
}
/**
* rsz_start - Enables Resizer Wrapper
* @arg: Currently not used.
* @device: Structure containing ISP resizer wrapper global information
*
* Submits a resizing task specified by the rsz_resize structure. The call can
* either be blocked until the task is completed or returned immediately based
* on the value of the blocking argument in the rsz_resize structure. If it is
* blocking, the status of the task can be checked by calling ioctl
* RSZ_G_STATUS. Only one task can be outstanding for each logical channel.
*
* Returns 0 if successful, or -EINVAL if could not set callback for RSZR IRQ
* event or the state of the channel is not configured.
**/
int rsz_start(int *arg, struct rsz_fh *fh)
{
struct channel_config *rsz_conf_chan = fh->config;
struct rsz_mult *multipass = fh->multipass;
struct videobuf_queue *q = &fh->vbq;
int ret;
if (rsz_conf_chan->config_state) {
dev_err(rsz_device, "State not configured \n");
goto err_einval;
}
rsz_conf_chan->status = CHANNEL_BUSY;
rsz_hardware_setup(rsz_conf_chan);
if (isp_set_callback(CBK_RESZ_DONE, rsz_isr, (void *) NULL,
(void *)NULL)) {
dev_err(rsz_device, "No callback for RSZR\n");
goto err_einval;
}
mult:
device_config->compl_isr.done = 0;
ispresizer_enable(1);
ret = wait_for_completion_interruptible(&device_config->compl_isr);
if (ret != 0) {
dev_dbg(rsz_device, "Unexpected exit from "
"wait_for_completion_interruptible\n");
wait_for_completion(&device_config->compl_isr);
}
if (multipass->active) {
rsz_set_multipass(multipass, rsz_conf_chan);
goto mult;
}
if (fh->isp_addr_read) {
ispmmu_unmap(fh->isp_addr_read);
fh->isp_addr_read = 0;
}
if (fh->isp_addr_write) {
ispmmu_unmap(fh->isp_addr_write);
fh->isp_addr_write = 0;
}
rsz_conf_chan->status = CHANNEL_FREE;
q->bufs[rsz_conf_chan->input_buf_index]->state = VIDEOBUF_NEEDS_INIT;
q->bufs[rsz_conf_chan->output_buf_index]->state = VIDEOBUF_NEEDS_INIT;
rsz_conf_chan->register_config.rsz_sdr_outadd = 0;
rsz_conf_chan->register_config.rsz_sdr_inadd = 0;
/* Unmap and free the DMA memory allocated for buffers */
videobuf_dma_unmap(q, videobuf_to_dma(
q->bufs[rsz_conf_chan->input_buf_index]));
videobuf_dma_unmap(q, videobuf_to_dma(
q->bufs[rsz_conf_chan->output_buf_index]));
videobuf_dma_free(videobuf_to_dma(
q->bufs[rsz_conf_chan->input_buf_index]));
videobuf_dma_free(videobuf_to_dma(
q->bufs[rsz_conf_chan->output_buf_index]));
isp_unset_callback(CBK_RESZ_DONE);
return 0;
err_einval:
return -EINVAL;
}