#define CICR1_DW_VAL(x) ((x) & CICR1_DW) /* Data bus width */
#define CICR1_PPL_VAL(x) (((x) << 15) & CICR1_PPL) /* Pixels per line */
+#define CICR1_COLOR_SP_VAL(x) (((x) << 3) & CICR1_COLOR_SP) /* color space */
+#define CICR1_RGB_BPP_VAL(x) (((x) << 7) & CICR1_RGB_BPP) /* bpp for rgb */
+#define CICR1_RGBT_CONV_VAL(x) (((x) << 29) & CICR1_RGBT_CONV) /* rgbt conv */
#define CICR2_BLW_VAL(x) (((x) << 24) & CICR2_BLW) /* Beginning-of-line pixel clock wait count */
#define CICR2_ELW_VAL(x) (((x) << 16) & CICR2_ELW) /* End-of-line pixel clock wait count */
/*
* Structures
*/
+enum pxa_camera_active_dma {
+ DMA_Y = 0x1,
+ DMA_U = 0x2,
+ DMA_V = 0x4,
+};
+
+/* descriptor needed for the PXA DMA engine */
+struct pxa_cam_dma {
+ dma_addr_t sg_dma;
+ struct pxa_dma_desc *sg_cpu;
+ size_t sg_size;
+ int sglen;
+};
/* buffer for one video frame */
struct pxa_buffer {
const struct soc_camera_data_format *fmt;
- /* our descriptor list needed for the PXA DMA engine */
- dma_addr_t sg_dma;
- struct pxa_dma_desc *sg_cpu;
- size_t sg_size;
+ /* our descriptor lists for Y, U and V channels */
+ struct pxa_cam_dma dmas[3];
+
int inwork;
+
+ enum pxa_camera_active_dma active_dma;
};
struct pxa_framebuffer_queue {
unsigned int irq;
void __iomem *base;
- unsigned int dma_chan_y;
+
+ unsigned int dma_chans[3];
struct pxacamera_platform_data *pdata;
struct resource *res;
dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size);
- *size = icd->width * icd->height * ((icd->current_fmt->depth + 7) >> 3);
+ /* planar capture requires Y, U and V buffers to be page aligned */
+ if (icd->current_fmt->fourcc == V4L2_PIX_FMT_YUV422P) {
+ *size = PAGE_ALIGN(icd->width * icd->height); /* Y pages */
+ *size += PAGE_ALIGN(icd->width * icd->height / 2); /* U pages */
+ *size += PAGE_ALIGN(icd->width * icd->height / 2); /* V pages */
+ } else {
+ *size = icd->width * icd->height *
+ ((icd->current_fmt->depth + 7) >> 3);
+ }
if (0 == *count)
*count = 32;
to_soc_camera_host(icd->dev.parent);
struct pxa_camera_dev *pcdev = ici->priv;
struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb);
+ int i;
BUG_ON(in_interrupt());
videobuf_dma_unmap(vq, dma);
videobuf_dma_free(dma);
- if (buf->sg_cpu)
- dma_free_coherent(pcdev->dev, buf->sg_size, buf->sg_cpu,
- buf->sg_dma);
- buf->sg_cpu = NULL;
+ for (i = 0; i < ARRAY_SIZE(buf->dmas); i++) {
+ if (buf->dmas[i].sg_cpu)
+ dma_free_coherent(pcdev->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;
}
+static int pxa_init_dma_channel(struct pxa_camera_dev *pcdev,
+ struct pxa_buffer *buf,
+ struct videobuf_dmabuf *dma, int channel,
+ int sglen, int sg_start, int cibr,
+ unsigned int size)
+{
+ struct pxa_cam_dma *pxa_dma = &buf->dmas[channel];
+ int i;
+
+ if (pxa_dma->sg_cpu)
+ dma_free_coherent(pcdev->dev, pxa_dma->sg_size,
+ pxa_dma->sg_cpu, pxa_dma->sg_dma);
+
+ pxa_dma->sg_size = (sglen + 1) * sizeof(struct pxa_dma_desc);
+ pxa_dma->sg_cpu = dma_alloc_coherent(pcdev->dev, pxa_dma->sg_size,
+ &pxa_dma->sg_dma, GFP_KERNEL);
+ if (!pxa_dma->sg_cpu)
+ return -ENOMEM;
+
+ pxa_dma->sglen = sglen;
+
+ for (i = 0; i < sglen; i++) {
+ int sg_i = sg_start + i;
+ struct scatterlist *sg = dma->sglist;
+ unsigned int dma_len = sg_dma_len(&sg[sg_i]), xfer_len;
+
+ pxa_dma->sg_cpu[i].dsadr = pcdev->res->start + cibr;
+ pxa_dma->sg_cpu[i].dtadr = sg_dma_address(&sg[sg_i]);
+
+ /* PXA27x Developer's Manual 27.4.4.1: round up to 8 bytes */
+ xfer_len = (min(dma_len, size) + 7) & ~7;
+
+ pxa_dma->sg_cpu[i].dcmd =
+ DCMD_FLOWSRC | DCMD_BURST8 | DCMD_INCTRGADDR | xfer_len;
+ size -= dma_len;
+ pxa_dma->sg_cpu[i].ddadr =
+ pxa_dma->sg_dma + (i + 1) * sizeof(struct pxa_dma_desc);
+ }
+
+ pxa_dma->sg_cpu[sglen - 1].ddadr = DDADR_STOP;
+ pxa_dma->sg_cpu[sglen - 1].dcmd |= DCMD_ENDIRQEN;
+
+ return 0;
+}
+
static int pxa_videobuf_prepare(struct videobuf_queue *vq,
struct videobuf_buffer *vb, enum v4l2_field field)
{
to_soc_camera_host(icd->dev.parent);
struct pxa_camera_dev *pcdev = ici->priv;
struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb);
- int i, ret;
+ int ret;
+ int sglen_y, sglen_yu = 0, sglen_u = 0, sglen_v = 0;
+ int size_y, size_u = 0, size_v = 0;
dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
vb, vb->baddr, vb->bsize);
if (ret)
goto fail;
- if (buf->sg_cpu)
- dma_free_coherent(pcdev->dev, buf->sg_size, buf->sg_cpu,
- buf->sg_dma);
+ if (buf->fmt->fourcc == V4L2_PIX_FMT_YUV422P) {
+ /* FIXME the calculations should be more precise */
+ sglen_y = dma->sglen / 2;
+ sglen_u = sglen_v = dma->sglen / 4 + 1;
+ sglen_yu = sglen_y + sglen_u;
+ size_y = size / 2;
+ size_u = size_v = size / 4;
+ } else {
+ sglen_y = dma->sglen;
+ size_y = size;
+ }
+
+ /* init DMA for Y channel */
+ ret = pxa_init_dma_channel(pcdev, buf, dma, 0, sglen_y,
+ 0, 0x28, size_y);
- buf->sg_size = (dma->sglen + 1) * sizeof(struct pxa_dma_desc);
- buf->sg_cpu = dma_alloc_coherent(pcdev->dev, buf->sg_size,
- &buf->sg_dma, GFP_KERNEL);
- if (!buf->sg_cpu) {
- ret = -ENOMEM;
+ if (ret) {
+ dev_err(pcdev->dev,
+ "DMA initialization for Y/RGB failed\n");
goto fail;
}
- dev_dbg(&icd->dev, "nents=%d size: %d sg=0x%p\n",
- dma->sglen, size, dma->sglist);
- for (i = 0; i < dma->sglen; i++) {
- struct scatterlist *sg = dma->sglist;
- unsigned int dma_len = sg_dma_len(&sg[i]), xfer_len;
-
- /* CIBR0 */
- buf->sg_cpu[i].dsadr = pcdev->res->start + 0x28;
- buf->sg_cpu[i].dtadr = sg_dma_address(&sg[i]);
- /* PXA270 Developer's Manual 27.4.4.1:
- * round up to 8 bytes */
- xfer_len = (min(dma_len, size) + 7) & ~7;
- if (xfer_len & 7)
- dev_err(&icd->dev, "Unaligned buffer: "
- "dma_len %u, size %u\n", dma_len, size);
- buf->sg_cpu[i].dcmd = DCMD_FLOWSRC | DCMD_BURST8 |
- DCMD_INCTRGADDR | xfer_len;
- size -= dma_len;
- buf->sg_cpu[i].ddadr = buf->sg_dma + (i + 1) *
- sizeof(struct pxa_dma_desc);
+ if (buf->fmt->fourcc == V4L2_PIX_FMT_YUV422P) {
+ /* init DMA for U channel */
+ ret = pxa_init_dma_channel(pcdev, buf, dma, 1, sglen_u,
+ sglen_y, 0x30, size_u);
+ if (ret) {
+ dev_err(pcdev->dev,
+ "DMA initialization for U failed\n");
+ goto fail_u;
+ }
+
+ /* init DMA for V channel */
+ ret = pxa_init_dma_channel(pcdev, buf, dma, 2, sglen_v,
+ sglen_yu, 0x38, size_v);
+ if (ret) {
+ dev_err(pcdev->dev,
+ "DMA initialization for V failed\n");
+ goto fail_v;
+ }
}
- buf->sg_cpu[dma->sglen - 1].ddadr = DDADR_STOP;
- buf->sg_cpu[dma->sglen - 1].dcmd |= DCMD_ENDIRQEN;
vb->state = VIDEOBUF_PREPARED;
}
buf->inwork = 0;
+ buf->active_dma = DMA_Y;
+ if (buf->fmt->fourcc == V4L2_PIX_FMT_YUV422P)
+ buf->active_dma |= DMA_U | DMA_V;
return 0;
+fail_v:
+ dma_free_coherent(pcdev->dev, buf->dmas[1].sg_size,
+ buf->dmas[1].sg_cpu, buf->dmas[1].sg_dma);
+fail_u:
+ dma_free_coherent(pcdev->dev, buf->dmas[0].sg_size,
+ buf->dmas[0].sg_cpu, buf->dmas[0].sg_dma);
fail:
free_buffer(vq, buf);
out:
struct pxa_camera_dev *pcdev = ici->priv;
struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb);
struct pxa_buffer *active;
- struct videobuf_dmabuf *dma = videobuf_to_dma(vb);
- int nents = dma->sglen;
unsigned long flags;
dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
if (!active) {
CIFR |= CIFR_RESET_F;
- DDADR(pcdev->dma_chan_y) = buf->sg_dma;
- DCSR(pcdev->dma_chan_y) = DCSR_RUN;
+ DDADR(pcdev->dma_chans[0]) = buf->dmas[0].sg_dma;
+ DCSR(pcdev->dma_chans[0]) = DCSR_RUN;
+
+ if (buf->fmt->fourcc == V4L2_PIX_FMT_YUV422P) {
+ DDADR(pcdev->dma_chans[1]) = buf->dmas[1].sg_dma;
+ DCSR(pcdev->dma_chans[1]) = DCSR_RUN;
+
+ DDADR(pcdev->dma_chans[2]) = buf->dmas[2].sg_dma;
+ DCSR(pcdev->dma_chans[2]) = DCSR_RUN;
+ }
+
pcdev->active = buf;
CICR0 |= CICR0_ENB;
} else {
- struct videobuf_dmabuf *active_dma =
- videobuf_to_dma(&active->vb);
- /* Stop DMA engine */
- DCSR(pcdev->dma_chan_y) = 0;
-
- /* Add the descriptors we just initialized to the currently
- * running chain
- */
- active->sg_cpu[active_dma->sglen - 1].ddadr = buf->sg_dma;
-
- /* Setup a dummy descriptor with the DMA engines current
- * state
- */
- /* CIBR0 */
- buf->sg_cpu[nents].dsadr = pcdev->res->start + 0x28;
- buf->sg_cpu[nents].dtadr = DTADR(pcdev->dma_chan_y);
- buf->sg_cpu[nents].dcmd = DCMD(pcdev->dma_chan_y);
-
- if (DDADR(pcdev->dma_chan_y) == DDADR_STOP) {
- /* The DMA engine is on the last descriptor, set the
- * next descriptors address to the descriptors
- * we just initialized
+ struct pxa_cam_dma *buf_dma;
+ struct pxa_cam_dma *act_dma;
+ int channels = 1;
+ int nents;
+ int i;
+
+ if (buf->fmt->fourcc == V4L2_PIX_FMT_YUV422P)
+ channels = 3;
+
+ for (i = 0; i < channels; i++) {
+ buf_dma = &buf->dmas[i];
+ act_dma = &active->dmas[i];
+ nents = buf_dma->sglen;
+
+ /* Stop DMA engine */
+ DCSR(pcdev->dma_chans[i]) = 0;
+
+ /* Add the descriptors we just initialized to
+ the currently running chain */
+ act_dma->sg_cpu[act_dma->sglen - 1].ddadr =
+ buf_dma->sg_dma;
+
+ /* Setup a dummy descriptor with the DMA engines current
+ * state
*/
- buf->sg_cpu[nents].ddadr = buf->sg_dma;
- } else {
- buf->sg_cpu[nents].ddadr = DDADR(pcdev->dma_chan_y);
+ buf_dma->sg_cpu[nents].dsadr =
+ pcdev->res->start + 0x28 + i*8; /* CIBRx */
+ buf_dma->sg_cpu[nents].dtadr =
+ DTADR(pcdev->dma_chans[i]);
+ buf_dma->sg_cpu[nents].dcmd =
+ DCMD(pcdev->dma_chans[i]);
+
+ if (DDADR(pcdev->dma_chans[i]) == DDADR_STOP) {
+ /* The DMA engine is on the last
+ descriptor, set the next descriptors
+ address to the descriptors we just
+ initialized */
+ buf_dma->sg_cpu[nents].ddadr = buf_dma->sg_dma;
+ } else {
+ buf_dma->sg_cpu[nents].ddadr =
+ DDADR(pcdev->dma_chans[i]);
+ }
+
+ /* The next descriptor is the dummy descriptor */
+ DDADR(pcdev->dma_chans[i]) = buf_dma->sg_dma + nents *
+ sizeof(struct pxa_dma_desc);
+
+ DCSR(pcdev->dma_chans[i]) = DCSR_RUN;
}
-
- /* The next descriptor is the dummy descriptor */
- DDADR(pcdev->dma_chan_y) = buf->sg_dma + nents *
- sizeof(struct pxa_dma_desc);
-
#ifdef DEBUG
- if (CISR & CISR_IFO_0) {
+ if (CISR & (CISR_IFO_0 | CISR_IFO_1 | CISR_IFO_2)) {
dev_warn(pcdev->dev, "FIFO overrun\n");
- DDADR(pcdev->dma_chan_y) = pcdev->active->sg_dma;
+ for (i = 0; i < channels; i++)
+ DDADR(pcdev->dma_chans[i]) =
+ pcdev->active->dmas[i].sg_dma;
CICR0 &= ~CICR0_ENB;
CIFR |= CIFR_RESET_F;
- DCSR(pcdev->dma_chan_y) = DCSR_RUN;
+ for (i = 0; i < channels; i++)
+ DCSR(pcdev->dma_chans[i]) = DCSR_RUN;
CICR0 |= CICR0_ENB;
- } else
+ }
#endif
- DCSR(pcdev->dma_chan_y) = DCSR_RUN;
}
spin_unlock_irqrestore(&pcdev->lock, flags);
-
}
static void pxa_videobuf_release(struct videobuf_queue *vq,
free_buffer(vq, buf);
}
-static void pxa_camera_dma_irq_y(int channel, void *data)
+static void pxa_camera_wakeup(struct pxa_camera_dev *pcdev,
+ struct videobuf_buffer *vb,
+ struct pxa_buffer *buf)
+{
+ /* _init is used to debug races, see comment in pxa_camera_reqbufs() */
+ list_del_init(&vb->queue);
+ vb->state = VIDEOBUF_DONE;
+ do_gettimeofday(&vb->ts);
+ vb->field_count++;
+ wake_up(&vb->done);
+
+ if (list_empty(&pcdev->capture)) {
+ pcdev->active = NULL;
+ DCSR(pcdev->dma_chans[0]) = 0;
+ DCSR(pcdev->dma_chans[1]) = 0;
+ DCSR(pcdev->dma_chans[2]) = 0;
+ CICR0 &= ~CICR0_ENB;
+ return;
+ }
+
+ pcdev->active = list_entry(pcdev->capture.next,
+ struct pxa_buffer, vb.queue);
+}
+
+static void pxa_camera_dma_irq(int channel, struct pxa_camera_dev *pcdev,
+ enum pxa_camera_active_dma act_dma)
{
- struct pxa_camera_dev *pcdev = data;
struct pxa_buffer *buf;
unsigned long flags;
unsigned int status;
spin_lock_irqsave(&pcdev->lock, flags);
- status = DCSR(pcdev->dma_chan_y);
- DCSR(pcdev->dma_chan_y) = status;
+ status = DCSR(channel);
+ DCSR(channel) = status | DCSR_ENDINTR;
if (status & DCSR_BUSERR) {
dev_err(pcdev->dev, "DMA Bus Error IRQ!\n");
dev_dbg(pcdev->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
vb, vb->baddr, vb->bsize);
- /* _init is used to debug races, see comment in pxa_camera_reqbufs() */
- list_del_init(&vb->queue);
- vb->state = VIDEOBUF_DONE;
- do_gettimeofday(&vb->ts);
- vb->field_count++;
- wake_up(&vb->done);
-
- if (list_empty(&pcdev->capture)) {
- pcdev->active = NULL;
- DCSR(pcdev->dma_chan_y) = 0;
- CICR0 &= ~CICR0_ENB;
- goto out;
- }
-
- pcdev->active = list_entry(pcdev->capture.next, struct pxa_buffer,
- vb.queue);
+ buf->active_dma &= ~act_dma;
+ if (!buf->active_dma)
+ pxa_camera_wakeup(pcdev, vb, buf);
out:
spin_unlock_irqrestore(&pcdev->lock, flags);
}
+static void pxa_camera_dma_irq_y(int channel, void *data)
+{
+ struct pxa_camera_dev *pcdev = data;
+ pxa_camera_dma_irq(channel, pcdev, DMA_Y);
+}
+
+static void pxa_camera_dma_irq_u(int channel, void *data)
+{
+ struct pxa_camera_dev *pcdev = data;
+ pxa_camera_dma_irq(channel, pcdev, DMA_U);
+}
+
+static void pxa_camera_dma_irq_v(int channel, void *data)
+{
+ struct pxa_camera_dev *pcdev = data;
+ pxa_camera_dma_irq(channel, pcdev, DMA_V);
+}
+
static struct videobuf_queue_ops pxa_videobuf_ops = {
.buf_setup = pxa_videobuf_setup,
.buf_prepare = pxa_videobuf_prepare,
dev_dbg(pcdev->dev, "Camera interrupt status 0x%x\n", status);
CISR = status;
-
return IRQ_HANDLED;
}
/* disable capture, disable interrupts */
CICR0 = 0x3ff;
+
/* Stop DMA engine */
- DCSR(pcdev->dma_chan_y) = 0;
+ DCSR(pcdev->dma_chans[0]) = 0;
+ DCSR(pcdev->dma_chans[1]) = 0;
+ DCSR(pcdev->dma_chans[2]) = 0;
icd->ops->release(icd);
to_soc_camera_host(icd->dev.parent);
struct pxa_camera_dev *pcdev = ici->priv;
unsigned long dw, bpp, bus_flags, camera_flags, common_flags;
- u32 cicr0, cicr4 = 0;
+ u32 cicr0, cicr1, cicr4 = 0;
int ret = test_platform_param(pcdev, icd->buswidth, &bus_flags);
if (ret < 0)
cicr0 = CICR0;
if (cicr0 & CICR0_ENB)
CICR0 = cicr0 & ~CICR0_ENB;
- CICR1 = CICR1_PPL_VAL(icd->width - 1) | bpp | dw;
+
+ cicr1 = CICR1_PPL_VAL(icd->width - 1) | bpp | dw;
+
+ switch (pixfmt) {
+ case V4L2_PIX_FMT_YUV422P:
+ cicr1 |= CICR1_YCBCR_F;
+ case V4L2_PIX_FMT_YUYV:
+ cicr1 |= CICR1_COLOR_SP_VAL(2);
+ break;
+ case V4L2_PIX_FMT_RGB555:
+ cicr1 |= CICR1_RGB_BPP_VAL(1) | CICR1_RGBT_CONV_VAL(2) |
+ CICR1_TBIT | CICR1_COLOR_SP_VAL(1);
+ break;
+ case V4L2_PIX_FMT_RGB565:
+ cicr1 |= CICR1_COLOR_SP_VAL(1) | CICR1_RGB_BPP_VAL(2);
+ break;
+ }
+
+ CICR1 = cicr1;
CICR2 = 0;
CICR3 = CICR3_LPF_VAL(icd->height - 1) |
CICR3_BFW_VAL(min((unsigned short)255, icd->y_skip_top));
pcdev->dev = &pdev->dev;
/* request dma */
- pcdev->dma_chan_y = pxa_request_dma("CI_Y", DMA_PRIO_HIGH,
- pxa_camera_dma_irq_y, pcdev);
- if (pcdev->dma_chan_y < 0) {
+ pcdev->dma_chans[0] = pxa_request_dma("CI_Y", DMA_PRIO_HIGH,
+ pxa_camera_dma_irq_y, pcdev);
+ if (pcdev->dma_chans[0] < 0) {
dev_err(pcdev->dev, "Can't request DMA for Y\n");
err = -ENOMEM;
goto exit_iounmap;
}
- dev_dbg(pcdev->dev, "got DMA channel %d\n", pcdev->dma_chan_y);
+ dev_dbg(pcdev->dev, "got DMA channel %d\n", pcdev->dma_chans[0]);
+
+ pcdev->dma_chans[1] = pxa_request_dma("CI_U", DMA_PRIO_HIGH,
+ pxa_camera_dma_irq_u, pcdev);
+ if (pcdev->dma_chans[1] < 0) {
+ dev_err(pcdev->dev, "Can't request DMA for U\n");
+ err = -ENOMEM;
+ goto exit_free_dma_y;
+ }
+ dev_dbg(pcdev->dev, "got DMA channel (U) %d\n", pcdev->dma_chans[1]);
+
+ pcdev->dma_chans[2] = pxa_request_dma("CI_V", DMA_PRIO_HIGH,
+ pxa_camera_dma_irq_v, pcdev);
+ if (pcdev->dma_chans[0] < 0) {
+ dev_err(pcdev->dev, "Can't request DMA for V\n");
+ err = -ENOMEM;
+ goto exit_free_dma_u;
+ }
+ dev_dbg(pcdev->dev, "got DMA channel (V) %d\n", pcdev->dma_chans[2]);
- DRCMR68 = pcdev->dma_chan_y | DRCMR_MAPVLD;
+ DRCMR68 = pcdev->dma_chans[0] | DRCMR_MAPVLD;
+ DRCMR69 = pcdev->dma_chans[1] | DRCMR_MAPVLD;
+ DRCMR70 = pcdev->dma_chans[2] | DRCMR_MAPVLD;
/* request irq */
err = request_irq(pcdev->irq, pxa_camera_irq, 0, PXA_CAM_DRV_NAME,
exit_free_irq:
free_irq(pcdev->irq, pcdev);
exit_free_dma:
- pxa_free_dma(pcdev->dma_chan_y);
+ pxa_free_dma(pcdev->dma_chans[2]);
+exit_free_dma_u:
+ pxa_free_dma(pcdev->dma_chans[1]);
+exit_free_dma_y:
+ pxa_free_dma(pcdev->dma_chans[0]);
exit_iounmap:
iounmap(base);
exit_release:
clk_put(pcdev->clk);
- pxa_free_dma(pcdev->dma_chan_y);
+ pxa_free_dma(pcdev->dma_chans[0]);
+ pxa_free_dma(pcdev->dma_chans[1]);
+ pxa_free_dma(pcdev->dma_chans[2]);
free_irq(pcdev->irq, pcdev);
soc_camera_host_unregister(&pxa_soc_camera_host);
projects / platform / kernel / kernel-mfld-blackbay.git / commitdiff