/*
* omap3isp_hist_init - Module Initialization.
*/
int omap3isp_hist_init(struct isp_device *isp)
{
struct ispstat *hist = &isp->isp_hist;
struct omap3isp_hist_config *hist_cfg;
int ret = -1;
hist_cfg = devm_kzalloc(isp->dev, sizeof(*hist_cfg), GFP_KERNEL);
if (hist_cfg == NULL)
return -ENOMEM;
hist->isp = isp;
if (HIST_CONFIG_DMA) {
struct platform_device *pdev = to_platform_device(isp->dev);
struct resource *res;
unsigned int sig = 0;
dma_cap_mask_t mask;
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
res = platform_get_resource_byname(pdev, IORESOURCE_DMA,
"hist");
if (res)
sig = res->start;
hist->dma_ch = dma_request_slave_channel_compat_reason(mask,
omap_dma_filter_fn, &sig, isp->dev, "hist");
if (IS_ERR(hist->dma_ch)) {
ret = PTR_ERR(hist->dma_ch);
if (ret == -EPROBE_DEFER)
return ret;
hist->dma_ch = NULL;
dev_warn(isp->dev,
"hist: DMA channel request failed, using PIO\n");
} else {
dev_dbg(isp->dev, "hist: using DMA channel %s\n",
dma_chan_name(hist->dma_ch));
}
}
hist->ops = &hist_ops;
hist->priv = hist_cfg;
hist->event_type = V4L2_EVENT_OMAP3ISP_HIST;
ret = omap3isp_stat_init(hist, "histogram", &hist_subdev_ops);
if (ret) {
if (hist->dma_ch)
dma_release_channel(hist->dma_ch);
}
return ret;
}
int omap3isp_hist_init(struct isp_device *isp)
{
struct ispstat *hist = &isp->isp_hist;
struct omap3isp_hist_config *hist_cfg;
int ret = -1;
hist_cfg = kzalloc(sizeof(*hist_cfg), GFP_KERNEL);
if (hist_cfg == NULL)
return -ENOMEM;
memset(hist, 0, sizeof(*hist));
if (HIST_CONFIG_DMA)
ret = omap_request_dma(OMAP24XX_DMA_NO_DEVICE, "DMA_ISP_HIST",
hist_dma_cb, hist, &hist->dma_ch);
if (ret) {
if (HIST_CONFIG_DMA)
dev_warn(isp->dev, "hist: DMA request channel failed. "
"Using PIO only.\n");
hist->dma_ch = -1;
} else {
dev_dbg(isp->dev, "hist: DMA channel = %d\n", hist->dma_ch);
hist_dma_config(hist);
omap_enable_dma_irq(hist->dma_ch, OMAP_DMA_BLOCK_IRQ);
}
hist->ops = &hist_ops;
hist->priv = hist_cfg;
hist->event_type = V4L2_EVENT_OMAP3ISP_HIST;
hist->isp = isp;
ret = omap3isp_stat_init(hist, "histogram", &hist_subdev_ops);
if (ret) {
kfree(hist_cfg);
if (HIST_USING_DMA(hist))
omap_free_dma(hist->dma_ch);
}
return ret;
}
