#include <linux/version.h>
#include <linux/device.h>
#include <linux/platform_device.h>
-#include <linux/mutex.h>
#include <linux/clk.h>
+#include <linux/sched.h>
#include <media/v4l2-common.h>
#include <media/v4l2-dev.h>
#include <linux/videodev2.h>
-#include <asm/dma.h>
-#include <mach/pxa-regs.h>
+#include <mach/dma.h>
#include <mach/camera.h>
#define PXA_CAM_VERSION_CODE KERNEL_VERSION(0, 0, 5)
CICR0_PERRM | CICR0_QDM | CICR0_CDM | CICR0_SOFM | \
CICR0_EOFM | CICR0_FOM)
-static DEFINE_MUTEX(camera_lock);
-
/*
* Structures
*/
};
struct pxa_camera_dev {
- struct device *dev;
+ struct soc_camera_host soc_host;
/* PXA27x is only supposed to handle one camera on its Quick Capture
* interface. If anyone ever builds hardware to enable more than
* one camera, they will have to modify this driver too */
struct pxacamera_platform_data *pdata;
struct resource *res;
unsigned long platform_flags;
- unsigned long platform_mclk_10khz;
+ unsigned long ciclk;
+ unsigned long mclk;
+ u32 mclk_divisor;
struct list_head capture;
u32 save_cicr[5];
};
+struct pxa_cam {
+ unsigned long flags;
+};
+
static const char *pxa_cam_driver_description = "PXA_Camera";
static unsigned int vid_limit = 16; /* Video memory limit, in Mb */
unsigned int *size)
{
struct soc_camera_device *icd = vq->priv_data;
- struct soc_camera_host *ici =
- to_soc_camera_host(icd->dev.parent);
- struct pxa_camera_dev *pcdev = ici->priv;
- dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size);
+ dev_dbg(icd->dev.parent, "count=%d, size=%d\n", *count, *size);
- /* planar capture requires Y, U and V buffers to be page aligned */
- if (pcdev->channels == 3) {
- *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);
- }
+ *size = roundup(icd->user_width * icd->user_height *
+ ((icd->current_fmt->depth + 7) >> 3), 8);
if (0 == *count)
*count = 32;
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->dev.parent);
- struct pxa_camera_dev *pcdev = ici->priv;
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb);
int i;
BUG_ON(in_interrupt());
- dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
+ dev_dbg(icd->dev.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
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,
+ 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;
}
+static int calculate_dma_sglen(struct scatterlist *sglist, int sglen,
+ int sg_first_ofs, int size)
+{
+ int i, offset, dma_len, xfer_len;
+ struct scatterlist *sg;
+
+ offset = sg_first_ofs;
+ for_each_sg(sglist, sg, sglen, i) {
+ dma_len = sg_dma_len(sg);
+
+ /* PXA27x Developer's Manual 27.4.4.1: round up to 8 bytes */
+ xfer_len = roundup(min(dma_len - offset, size), 8);
+
+ size = max(0, size - xfer_len);
+ offset = 0;
+ if (size == 0)
+ break;
+ }
+
+ BUG_ON(size != 0);
+ return i + 1;
+}
+
+/**
+ * pxa_init_dma_channel - init dma descriptors
+ * @pcdev: pxa camera device
+ * @buf: pxa buffer to find pxa dma channel
+ * @dma: dma video buffer
+ * @channel: dma channel (0 => 'Y', 1 => 'U', 2 => 'V')
+ * @cibr: camera Receive Buffer Register
+ * @size: bytes to transfer
+ * @sg_first: first element of sg_list
+ * @sg_first_ofs: offset in first element of sg_list
+ *
+ * Prepares the pxa dma descriptors to transfer one camera channel.
+ * Beware sg_first and sg_first_ofs are both input and output parameters.
+ *
+ * Returns 0 or -ENOMEM if no coherent memory is available
+ */
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)
+ int cibr, int size,
+ struct scatterlist **sg_first, int *sg_first_ofs)
{
struct pxa_cam_dma *pxa_dma = &buf->dmas[channel];
- int i;
+ struct device *dev = pcdev->soc_host.v4l2_dev.dev;
+ struct scatterlist *sg;
+ int i, offset, sglen;
+ int dma_len = 0, xfer_len = 0;
if (pxa_dma->sg_cpu)
- dma_free_coherent(pcdev->dev, pxa_dma->sg_size,
+ dma_free_coherent(dev, pxa_dma->sg_size,
pxa_dma->sg_cpu, pxa_dma->sg_dma);
+ sglen = calculate_dma_sglen(*sg_first, dma->sglen,
+ *sg_first_ofs, size);
+
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_cpu = dma_alloc_coherent(dev, pxa_dma->sg_size,
&pxa_dma->sg_dma, GFP_KERNEL);
if (!pxa_dma->sg_cpu)
return -ENOMEM;
pxa_dma->sglen = sglen;
+ offset = *sg_first_ofs;
- 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;
+ dev_dbg(dev, "DMA: sg_first=%p, sglen=%d, ofs=%d, dma.desc=%x\n",
+ *sg_first, sglen, *sg_first_ofs, pxa_dma->sg_dma);
- pxa_dma->sg_cpu[i].dsadr = pcdev->res->start + cibr;
- pxa_dma->sg_cpu[i].dtadr = sg_dma_address(&sg[sg_i]);
+
+ for_each_sg(*sg_first, sg, sglen, i) {
+ dma_len = sg_dma_len(sg);
/* PXA27x Developer's Manual 27.4.4.1: round up to 8 bytes */
- xfer_len = (min(dma_len, size) + 7) & ~7;
+ xfer_len = roundup(min(dma_len - offset, size), 8);
+ size = max(0, size - xfer_len);
+
+ pxa_dma->sg_cpu[i].dsadr = pcdev->res->start + cibr;
+ pxa_dma->sg_cpu[i].dtadr = sg_dma_address(sg) + offset;
pxa_dma->sg_cpu[i].dcmd =
DCMD_FLOWSRC | DCMD_BURST8 | DCMD_INCTRGADDR | xfer_len;
- size -= dma_len;
+#ifdef DEBUG
+ if (!i)
+ pxa_dma->sg_cpu[i].dcmd |= DCMD_STARTIRQEN;
+#endif
pxa_dma->sg_cpu[i].ddadr =
pxa_dma->sg_dma + (i + 1) * sizeof(struct pxa_dma_desc);
+
+ dev_vdbg(dev, "DMA: desc.%08x->@phys=0x%08x, len=%d\n",
+ pxa_dma->sg_dma + i * sizeof(struct pxa_dma_desc),
+ sg_dma_address(sg) + offset, xfer_len);
+ offset = 0;
+
+ if (size == 0)
+ break;
}
- pxa_dma->sg_cpu[sglen - 1].ddadr = DDADR_STOP;
- pxa_dma->sg_cpu[sglen - 1].dcmd |= DCMD_ENDIRQEN;
+ pxa_dma->sg_cpu[sglen].ddadr = DDADR_STOP;
+ pxa_dma->sg_cpu[sglen].dcmd = DCMD_FLOWSRC | DCMD_BURST8 | DCMD_ENDIRQEN;
+
+ /*
+ * Handle 1 special case :
+ * - in 3 planes (YUV422P format), we might finish with xfer_len equal
+ * to dma_len (end on PAGE boundary). In this case, the sg element
+ * for next plane should be the next after the last used to store the
+ * last scatter gather RAM page
+ */
+ if (xfer_len >= dma_len) {
+ *sg_first_ofs = xfer_len - dma_len;
+ *sg_first = sg_next(sg);
+ } else {
+ *sg_first_ofs = xfer_len;
+ *sg_first = sg;
+ }
return 0;
}
+static void pxa_videobuf_set_actdma(struct pxa_camera_dev *pcdev,
+ struct pxa_buffer *buf)
+{
+ buf->active_dma = DMA_Y;
+ if (pcdev->channels == 3)
+ buf->active_dma |= DMA_U | DMA_V;
+}
+
+/*
+ * Please check the DMA prepared buffer structure in :
+ * Documentation/video4linux/pxa_camera.txt
+ * Please check also in pxa_camera_check_link_miss() to understand why DMA chain
+ * modification while DMA chain is running will work anyway.
+ */
static int pxa_videobuf_prepare(struct videobuf_queue *vq,
struct videobuf_buffer *vb, enum v4l2_field field)
{
struct soc_camera_device *icd = vq->priv_data;
- struct soc_camera_host *ici =
- to_soc_camera_host(icd->dev.parent);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct pxa_camera_dev *pcdev = ici->priv;
+ struct device *dev = pcdev->soc_host.v4l2_dev.dev;
struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb);
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__,
+ dev_dbg(dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
vb, vb->baddr, vb->bsize);
/* Added list head initialization on alloc */
buf->inwork = 1;
if (buf->fmt != icd->current_fmt ||
- vb->width != icd->width ||
- vb->height != icd->height ||
+ vb->width != icd->user_width ||
+ vb->height != icd->user_height ||
vb->field != field) {
buf->fmt = icd->current_fmt;
- vb->width = icd->width;
- vb->height = icd->height;
+ vb->width = icd->user_width;
+ vb->height = icd->user_height;
vb->field = field;
vb->state = VIDEOBUF_NEEDS_INIT;
}
}
if (vb->state == VIDEOBUF_NEEDS_INIT) {
- unsigned int size = vb->size;
+ int size = vb->size;
+ int next_ofs = 0;
struct videobuf_dmabuf *dma = videobuf_to_dma(vb);
+ struct scatterlist *sg;
ret = videobuf_iolock(vq, vb, NULL);
if (ret)
goto fail;
if (pcdev->channels == 3) {
- /* 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);
+ sg = dma->sglist;
+ /* init DMA for Y channel */
+ ret = pxa_init_dma_channel(pcdev, buf, dma, 0, CIBR0, size_y,
+ &sg, &next_ofs);
if (ret) {
- dev_err(pcdev->dev,
- "DMA initialization for Y/RGB failed\n");
+ dev_err(dev, "DMA initialization for Y/RGB failed\n");
goto fail;
}
- if (pcdev->channels == 3) {
- /* 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;
- }
+ /* init DMA for U channel */
+ if (size_u)
+ ret = pxa_init_dma_channel(pcdev, buf, dma, 1, CIBR1,
+ size_u, &sg, &next_ofs);
+ if (ret) {
+ dev_err(dev, "DMA initialization for U failed\n");
+ goto fail_u;
+ }
+
+ /* init DMA for V channel */
+ if (size_v)
+ ret = pxa_init_dma_channel(pcdev, buf, dma, 2, CIBR2,
+ size_v, &sg, &next_ofs);
+ if (ret) {
+ dev_err(dev, "DMA initialization for V failed\n");
+ goto fail_v;
}
vb->state = VIDEOBUF_PREPARED;
}
buf->inwork = 0;
- buf->active_dma = DMA_Y;
- if (pcdev->channels == 3)
- buf->active_dma |= DMA_U | DMA_V;
+ pxa_videobuf_set_actdma(pcdev, buf);
return 0;
fail_v:
- dma_free_coherent(pcdev->dev, buf->dmas[1].sg_size,
+ dma_free_coherent(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,
+ dma_free_coherent(dev, buf->dmas[0].sg_size,
buf->dmas[0].sg_cpu, buf->dmas[0].sg_dma);
fail:
free_buffer(vq, buf);
return ret;
}
-static void pxa_videobuf_queue(struct videobuf_queue *vq,
- struct videobuf_buffer *vb)
+/**
+ * pxa_dma_start_channels - start DMA channel for active buffer
+ * @pcdev: pxa camera device
+ *
+ * Initialize DMA channels to the beginning of the active video buffer, and
+ * start these channels.
+ */
+static void pxa_dma_start_channels(struct pxa_camera_dev *pcdev)
{
- struct soc_camera_device *icd = vq->priv_data;
- struct soc_camera_host *ici =
- 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);
- struct pxa_buffer *active;
- unsigned long flags;
int i;
+ struct pxa_buffer *active;
- dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
- vb, vb->baddr, vb->bsize);
- spin_lock_irqsave(&pcdev->lock, flags);
+ active = pcdev->active;
- list_add_tail(&vb->queue, &pcdev->capture);
+ for (i = 0; i < pcdev->channels; i++) {
+ dev_dbg(pcdev->soc_host.v4l2_dev.dev,
+ "%s (channel=%d) ddadr=%08x\n", __func__,
+ i, active->dmas[i].sg_dma);
+ DDADR(pcdev->dma_chans[i]) = active->dmas[i].sg_dma;
+ DCSR(pcdev->dma_chans[i]) = DCSR_RUN;
+ }
+}
- vb->state = VIDEOBUF_ACTIVE;
- active = pcdev->active;
+static void pxa_dma_stop_channels(struct pxa_camera_dev *pcdev)
+{
+ int i;
- if (!active) {
- unsigned long cifr, cicr0;
+ for (i = 0; i < pcdev->channels; i++) {
+ dev_dbg(pcdev->soc_host.v4l2_dev.dev,
+ "%s (channel=%d)\n", __func__, i);
+ DCSR(pcdev->dma_chans[i]) = 0;
+ }
+}
- cifr = __raw_readl(pcdev->base + CIFR) | CIFR_RESET_F;
- __raw_writel(cifr, pcdev->base + CIFR);
+static void pxa_dma_add_tail_buf(struct pxa_camera_dev *pcdev,
+ struct pxa_buffer *buf)
+{
+ int i;
+ struct pxa_dma_desc *buf_last_desc;
- for (i = 0; i < pcdev->channels; i++) {
- DDADR(pcdev->dma_chans[i]) = buf->dmas[i].sg_dma;
- DCSR(pcdev->dma_chans[i]) = DCSR_RUN;
- pcdev->sg_tail[i] = buf->dmas[i].sg_cpu + buf->dmas[i].sglen - 1;
- }
+ for (i = 0; i < pcdev->channels; i++) {
+ buf_last_desc = buf->dmas[i].sg_cpu + buf->dmas[i].sglen;
+ buf_last_desc->ddadr = DDADR_STOP;
- pcdev->active = buf;
+ if (pcdev->sg_tail[i])
+ /* Link the new buffer to the old tail */
+ pcdev->sg_tail[i]->ddadr = buf->dmas[i].sg_dma;
- cicr0 = __raw_readl(pcdev->base + CICR0) | CICR0_ENB;
- __raw_writel(cicr0, pcdev->base + CICR0);
- } else {
- struct pxa_cam_dma *buf_dma;
- struct pxa_cam_dma *act_dma;
- int nents;
-
- for (i = 0; i < pcdev->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 */
- pcdev->sg_tail[i]->ddadr = buf_dma->sg_dma;
- pcdev->sg_tail[i] = buf_dma->sg_cpu + buf_dma->sglen - 1;
-
- /* Setup a dummy descriptor with the DMA engines current
- * state
- */
- 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;
- }
+ /* Update the channel tail */
+ pcdev->sg_tail[i] = buf_last_desc;
}
+}
- spin_unlock_irqrestore(&pcdev->lock, flags);
+/**
+ * pxa_camera_start_capture - start video capturing
+ * @pcdev: camera device
+ *
+ * Launch capturing. DMA channels should not be active yet. They should get
+ * activated at the end of frame interrupt, to capture only whole frames, and
+ * never begin the capture of a partial frame.
+ */
+static void pxa_camera_start_capture(struct pxa_camera_dev *pcdev)
+{
+ unsigned long cicr0, cifr;
+
+ dev_dbg(pcdev->soc_host.v4l2_dev.dev, "%s\n", __func__);
+ /* Reset the FIFOs */
+ cifr = __raw_readl(pcdev->base + CIFR) | CIFR_RESET_F;
+ __raw_writel(cifr, pcdev->base + CIFR);
+ /* Enable End-Of-Frame Interrupt */
+ cicr0 = __raw_readl(pcdev->base + CICR0) | CICR0_ENB;
+ cicr0 &= ~CICR0_EOFM;
+ __raw_writel(cicr0, pcdev->base + CICR0);
+}
+
+static void pxa_camera_stop_capture(struct pxa_camera_dev *pcdev)
+{
+ unsigned long cicr0;
+
+ pxa_dma_stop_channels(pcdev);
+
+ cicr0 = __raw_readl(pcdev->base + CICR0) & ~CICR0_ENB;
+ __raw_writel(cicr0, pcdev->base + CICR0);
+
+ pcdev->active = NULL;
+ dev_dbg(pcdev->soc_host.v4l2_dev.dev, "%s\n", __func__);
+}
+
+/* Called under spinlock_irqsave(&pcdev->lock, ...) */
+static void pxa_videobuf_queue(struct videobuf_queue *vq,
+ struct videobuf_buffer *vb)
+{
+ struct soc_camera_device *icd = vq->priv_data;
+ struct soc_camera_host *ici = 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);
+
+ dev_dbg(icd->dev.parent, "%s (vb=0x%p) 0x%08lx %d active=%p\n",
+ __func__, vb, vb->baddr, vb->bsize, pcdev->active);
+
+ list_add_tail(&vb->queue, &pcdev->capture);
+
+ vb->state = VIDEOBUF_ACTIVE;
+ pxa_dma_add_tail_buf(pcdev, buf);
+
+ if (!pcdev->active)
+ pxa_camera_start_capture(pcdev);
}
static void pxa_videobuf_release(struct videobuf_queue *vq,
struct pxa_buffer *buf = container_of(vb, struct pxa_buffer, vb);
#ifdef DEBUG
struct soc_camera_device *icd = vq->priv_data;
+ struct device *dev = icd->dev.parent;
- dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
+ dev_dbg(dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
vb, vb->baddr, vb->bsize);
switch (vb->state) {
case VIDEOBUF_ACTIVE:
- dev_dbg(&icd->dev, "%s (active)\n", __func__);
+ dev_dbg(dev, "%s (active)\n", __func__);
break;
case VIDEOBUF_QUEUED:
- dev_dbg(&icd->dev, "%s (queued)\n", __func__);
+ dev_dbg(dev, "%s (queued)\n", __func__);
break;
case VIDEOBUF_PREPARED:
- dev_dbg(&icd->dev, "%s (prepared)\n", __func__);
+ dev_dbg(dev, "%s (prepared)\n", __func__);
break;
default:
- dev_dbg(&icd->dev, "%s (unknown)\n", __func__);
+ dev_dbg(dev, "%s (unknown)\n", __func__);
break;
}
#endif
struct videobuf_buffer *vb,
struct pxa_buffer *buf)
{
- unsigned long cicr0;
+ int i;
/* _init is used to debug races, see comment in pxa_camera_reqbufs() */
list_del_init(&vb->queue);
do_gettimeofday(&vb->ts);
vb->field_count++;
wake_up(&vb->done);
+ dev_dbg(pcdev->soc_host.v4l2_dev.dev, "%s dequeud buffer (vb=0x%p)\n",
+ __func__, vb);
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 = __raw_readl(pcdev->base + CICR0) & ~CICR0_ENB;
- __raw_writel(cicr0, pcdev->base + CICR0);
+ pxa_camera_stop_capture(pcdev);
+ for (i = 0; i < pcdev->channels; i++)
+ pcdev->sg_tail[i] = NULL;
return;
}
struct pxa_buffer, vb.queue);
}
+/**
+ * pxa_camera_check_link_miss - check missed DMA linking
+ * @pcdev: camera device
+ *
+ * The DMA chaining is done with DMA running. This means a tiny temporal window
+ * remains, where a buffer is queued on the chain, while the chain is already
+ * stopped. This means the tailed buffer would never be transfered by DMA.
+ * This function restarts the capture for this corner case, where :
+ * - DADR() == DADDR_STOP
+ * - a videobuffer is queued on the pcdev->capture list
+ *
+ * Please check the "DMA hot chaining timeslice issue" in
+ * Documentation/video4linux/pxa_camera.txt
+ *
+ * Context: should only be called within the dma irq handler
+ */
+static void pxa_camera_check_link_miss(struct pxa_camera_dev *pcdev)
+{
+ int i, is_dma_stopped = 1;
+
+ for (i = 0; i < pcdev->channels; i++)
+ if (DDADR(pcdev->dma_chans[i]) != DDADR_STOP)
+ is_dma_stopped = 0;
+ dev_dbg(pcdev->soc_host.v4l2_dev.dev,
+ "%s : top queued buffer=%p, dma_stopped=%d\n",
+ __func__, pcdev->active, is_dma_stopped);
+ if (pcdev->active && is_dma_stopped)
+ pxa_camera_start_capture(pcdev);
+}
+
static void pxa_camera_dma_irq(int channel, struct pxa_camera_dev *pcdev,
enum pxa_camera_active_dma act_dma)
{
+ struct device *dev = pcdev->soc_host.v4l2_dev.dev;
struct pxa_buffer *buf;
unsigned long flags;
u32 status, camera_status, overrun;
struct videobuf_buffer *vb;
- unsigned long cifr, cicr0;
spin_lock_irqsave(&pcdev->lock, flags);
status = DCSR(channel);
- DCSR(channel) = status | DCSR_ENDINTR;
+ DCSR(channel) = status;
- if (status & DCSR_BUSERR) {
- dev_err(pcdev->dev, "DMA Bus Error IRQ!\n");
- goto out;
- }
+ camera_status = __raw_readl(pcdev->base + CISR);
+ overrun = CISR_IFO_0;
+ if (pcdev->channels == 3)
+ overrun |= CISR_IFO_1 | CISR_IFO_2;
- if (!(status & DCSR_ENDINTR)) {
- dev_err(pcdev->dev, "Unknown DMA IRQ source, "
- "status: 0x%08x\n", status);
+ if (status & DCSR_BUSERR) {
+ dev_err(dev, "DMA Bus Error IRQ!\n");
goto out;
}
- if (!pcdev->active) {
- dev_err(pcdev->dev, "DMA End IRQ with no active buffer!\n");
+ if (!(status & (DCSR_ENDINTR | DCSR_STARTINTR))) {
+ dev_err(dev, "Unknown DMA IRQ source, status: 0x%08x\n",
+ status);
goto out;
}
- camera_status = __raw_readl(pcdev->base + CISR);
- overrun = CISR_IFO_0;
- if (pcdev->channels == 3)
- overrun |= CISR_IFO_1 | CISR_IFO_2;
- if (camera_status & overrun) {
- dev_dbg(pcdev->dev, "FIFO overrun! CISR: %x\n", camera_status);
- /* Stop the Capture Interface */
- cicr0 = __raw_readl(pcdev->base + CICR0) & ~CICR0_ENB;
- __raw_writel(cicr0, pcdev->base + CICR0);
-
- /* Stop DMA */
- DCSR(channel) = 0;
- /* Reset the FIFOs */
- cifr = __raw_readl(pcdev->base + CIFR) | CIFR_RESET_F;
- __raw_writel(cifr, pcdev->base + CIFR);
- /* Enable End-Of-Frame Interrupt */
- cicr0 &= ~CICR0_EOFM;
- __raw_writel(cicr0, pcdev->base + CICR0);
- /* Restart the Capture Interface */
- __raw_writel(cicr0 | CICR0_ENB, pcdev->base + CICR0);
+ /*
+ * pcdev->active should not be NULL in DMA irq handler.
+ *
+ * But there is one corner case : if capture was stopped due to an
+ * overrun of channel 1, and at that same channel 2 was completed.
+ *
+ * When handling the overrun in DMA irq for channel 1, we'll stop the
+ * capture and restart it (and thus set pcdev->active to NULL). But the
+ * DMA irq handler will already be pending for channel 2. So on entering
+ * the DMA irq handler for channel 2 there will be no active buffer, yet
+ * that is normal.
+ */
+ if (!pcdev->active)
goto out;
- }
vb = &pcdev->active->vb;
buf = container_of(vb, struct pxa_buffer, vb);
WARN_ON(buf->inwork || list_empty(&vb->queue));
- dev_dbg(pcdev->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__,
- vb, vb->baddr, vb->bsize);
- buf->active_dma &= ~act_dma;
- if (!buf->active_dma)
- pxa_camera_wakeup(pcdev, vb, buf);
+ dev_dbg(dev, "%s channel=%d %s%s(vb=0x%p) dma.desc=%x\n",
+ __func__, channel, status & DCSR_STARTINTR ? "SOF " : "",
+ status & DCSR_ENDINTR ? "EOF " : "", vb, DDADR(channel));
+
+ if (status & DCSR_ENDINTR) {
+ /*
+ * It's normal if the last frame creates an overrun, as there
+ * are no more DMA descriptors to fetch from QCI fifos
+ */
+ if (camera_status & overrun &&
+ !list_is_last(pcdev->capture.next, &pcdev->capture)) {
+ dev_dbg(dev, "FIFO overrun! CISR: %x\n",
+ camera_status);
+ pxa_camera_stop_capture(pcdev);
+ pxa_camera_start_capture(pcdev);
+ goto out;
+ }
+ buf->active_dma &= ~act_dma;
+ if (!buf->active_dma) {
+ pxa_camera_wakeup(pcdev, vb, buf);
+ pxa_camera_check_link_miss(pcdev);
+ }
+ }
out:
spin_unlock_irqrestore(&pcdev->lock, flags);
sizeof(struct pxa_buffer), icd);
}
-static int mclk_get_divisor(struct pxa_camera_dev *pcdev)
+static u32 mclk_get_divisor(struct platform_device *pdev,
+ struct pxa_camera_dev *pcdev)
{
- unsigned int mclk_10khz = pcdev->platform_mclk_10khz;
- unsigned long div;
+ unsigned long mclk = pcdev->mclk;
+ struct device *dev = &pdev->dev;
+ u32 div;
unsigned long lcdclk;
- lcdclk = clk_get_rate(pcdev->clk) / 10000;
+ lcdclk = clk_get_rate(pcdev->clk);
+ pcdev->ciclk = lcdclk;
- /* We verify platform_mclk_10khz != 0, so if anyone breaks it, here
- * they get a nice Oops */
- div = (lcdclk + 2 * mclk_10khz - 1) / (2 * mclk_10khz) - 1;
+ /* mclk <= ciclk / 4 (27.4.2) */
+ if (mclk > lcdclk / 4) {
+ mclk = lcdclk / 4;
+ dev_warn(dev, "Limiting master clock to %lu\n", mclk);
+ }
- dev_dbg(pcdev->dev, "LCD clock %lukHz, target freq %dkHz, "
- "divisor %lu\n", lcdclk * 10, mclk_10khz * 10, div);
+ /* We verify mclk != 0, so if anyone breaks it, here comes their Oops */
+ div = (lcdclk + 2 * mclk - 1) / (2 * mclk) - 1;
+
+ /* If we're not supplying MCLK, leave it at 0 */
+ if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN)
+ pcdev->mclk = lcdclk / (2 * (div + 1));
+
+ dev_dbg(dev, "LCD clock %luHz, target freq %luHz, divisor %u\n",
+ lcdclk, mclk, div);
return div;
}
+static void recalculate_fifo_timeout(struct pxa_camera_dev *pcdev,
+ unsigned long pclk)
+{
+ /* We want a timeout > 1 pixel time, not ">=" */
+ u32 ciclk_per_pixel = pcdev->ciclk / pclk + 1;
+
+ __raw_writel(ciclk_per_pixel, pcdev->base + CITOR);
+}
+
static void pxa_camera_activate(struct pxa_camera_dev *pcdev)
{
struct pxacamera_platform_data *pdata = pcdev->pdata;
+ struct device *dev = pcdev->soc_host.v4l2_dev.dev;
u32 cicr4 = 0;
- dev_dbg(pcdev->dev, "Registered platform device at %p data %p\n",
+ dev_dbg(dev, "Registered platform device at %p data %p\n",
pcdev, pdata);
if (pdata && pdata->init) {
- dev_dbg(pcdev->dev, "%s: Init gpios\n", __func__);
- pdata->init(pcdev->dev);
+ dev_dbg(dev, "%s: Init gpios\n", __func__);
+ pdata->init(dev);
}
/* disable all interrupts */
if (pcdev->platform_flags & PXA_CAMERA_VSP)
cicr4 |= CICR4_VSP;
- cicr4 |= mclk_get_divisor(pcdev);
- __raw_writel(cicr4, pcdev->base + CICR4);
+ __raw_writel(pcdev->mclk_divisor | cicr4, pcdev->base + CICR4);
+
+ if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN)
+ /* Initialise the timeout under the assumption pclk = mclk */
+ recalculate_fifo_timeout(pcdev, pcdev->mclk);
+ else
+ /* "Safe default" - 13MHz */
+ recalculate_fifo_timeout(pcdev, 13000000);
clk_enable(pcdev->clk);
}
{
struct pxa_camera_dev *pcdev = data;
unsigned long status, cicr0;
+ struct pxa_buffer *buf;
+ struct videobuf_buffer *vb;
status = __raw_readl(pcdev->base + CISR);
- dev_dbg(pcdev->dev, "Camera interrupt status 0x%lx\n", status);
+ dev_dbg(pcdev->soc_host.v4l2_dev.dev,
+ "Camera interrupt status 0x%lx\n", status);
if (!status)
return IRQ_NONE;
__raw_writel(status, pcdev->base + CISR);
if (status & CISR_EOF) {
- int i;
- for (i = 0; i < pcdev->channels; i++) {
- DDADR(pcdev->dma_chans[i]) =
- pcdev->active->dmas[i].sg_dma;
- DCSR(pcdev->dma_chans[i]) = DCSR_RUN;
- }
+ pcdev->active = list_first_entry(&pcdev->capture,
+ struct pxa_buffer, vb.queue);
+ vb = &pcdev->active->vb;
+ buf = container_of(vb, struct pxa_buffer, vb);
+ pxa_videobuf_set_actdma(pcdev, buf);
+
+ pxa_dma_start_channels(pcdev);
+
cicr0 = __raw_readl(pcdev->base + CICR0) | CICR0_EOFM;
__raw_writel(cicr0, pcdev->base + CICR0);
}
return IRQ_HANDLED;
}
-/* The following two functions absolutely depend on the fact, that
- * there can be only one camera on PXA quick capture interface */
+/*
+ * The following two functions absolutely depend on the fact, that
+ * there can be only one camera on PXA quick capture interface
+ * Called with .video_lock held
+ */
static int pxa_camera_add_device(struct soc_camera_device *icd)
{
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct pxa_camera_dev *pcdev = ici->priv;
- int ret;
- mutex_lock(&camera_lock);
-
- if (pcdev->icd) {
- ret = -EBUSY;
- goto ebusy;
- }
-
- dev_info(&icd->dev, "PXA Camera driver attached to camera %d\n",
- icd->devnum);
+ if (pcdev->icd)
+ return -EBUSY;
pxa_camera_activate(pcdev);
- ret = icd->ops->init(icd);
- if (!ret)
- pcdev->icd = icd;
+ pcdev->icd = icd;
-ebusy:
- mutex_unlock(&camera_lock);
+ dev_info(icd->dev.parent, "PXA Camera driver attached to camera %d\n",
+ icd->devnum);
- return ret;
+ return 0;
}
+/* Called with .video_lock held */
static void pxa_camera_remove_device(struct soc_camera_device *icd)
{
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
BUG_ON(icd != pcdev->icd);
- dev_info(&icd->dev, "PXA Camera driver detached from camera %d\n",
+ dev_info(icd->dev.parent, "PXA Camera driver detached from camera %d\n",
icd->devnum);
/* disable capture, disable interrupts */
DCSR(pcdev->dma_chans[1]) = 0;
DCSR(pcdev->dma_chans[2]) = 0;
- icd->ops->release(icd);
-
pxa_camera_deactivate(pcdev);
pcdev->icd = NULL;
SOCAM_HSYNC_ACTIVE_LOW |
SOCAM_VSYNC_ACTIVE_HIGH |
SOCAM_VSYNC_ACTIVE_LOW |
+ SOCAM_DATA_ACTIVE_HIGH |
SOCAM_PCLK_SAMPLE_RISING |
SOCAM_PCLK_SAMPLE_FALLING;
return 0;
}
-static int pxa_camera_set_bus_param(struct soc_camera_device *icd, __u32 pixfmt)
+static void pxa_camera_setup_cicr(struct soc_camera_device *icd,
+ unsigned long flags, __u32 pixfmt)
{
- struct soc_camera_host *ici =
- to_soc_camera_host(icd->dev.parent);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct pxa_camera_dev *pcdev = ici->priv;
- unsigned long dw, bpp, bus_flags, camera_flags, common_flags;
+ unsigned long dw, bpp;
u32 cicr0, cicr1, cicr2, cicr3, cicr4 = 0;
- int ret = test_platform_param(pcdev, icd->buswidth, &bus_flags);
-
- if (ret < 0)
- return ret;
-
- camera_flags = icd->ops->query_bus_param(icd);
-
- common_flags = soc_camera_bus_param_compatible(camera_flags, bus_flags);
- if (!common_flags)
- return -EINVAL;
-
- pcdev->channels = 1;
-
- /* Make choises, based on platform preferences */
- if ((common_flags & SOCAM_HSYNC_ACTIVE_HIGH) &&
- (common_flags & SOCAM_HSYNC_ACTIVE_LOW)) {
- if (pcdev->platform_flags & PXA_CAMERA_HSP)
- common_flags &= ~SOCAM_HSYNC_ACTIVE_HIGH;
- else
- common_flags &= ~SOCAM_HSYNC_ACTIVE_LOW;
- }
-
- if ((common_flags & SOCAM_VSYNC_ACTIVE_HIGH) &&
- (common_flags & SOCAM_VSYNC_ACTIVE_LOW)) {
- if (pcdev->platform_flags & PXA_CAMERA_VSP)
- common_flags &= ~SOCAM_VSYNC_ACTIVE_HIGH;
- else
- common_flags &= ~SOCAM_VSYNC_ACTIVE_LOW;
- }
-
- if ((common_flags & SOCAM_PCLK_SAMPLE_RISING) &&
- (common_flags & SOCAM_PCLK_SAMPLE_FALLING)) {
- if (pcdev->platform_flags & PXA_CAMERA_PCP)
- common_flags &= ~SOCAM_PCLK_SAMPLE_RISING;
- else
- common_flags &= ~SOCAM_PCLK_SAMPLE_FALLING;
- }
-
- ret = icd->ops->set_bus_param(icd, common_flags);
- if (ret < 0)
- return ret;
/* Datawidth is now guaranteed to be equal to one of the three values.
* We fix bit-per-pixel equal to data-width... */
- switch (common_flags & SOCAM_DATAWIDTH_MASK) {
+ switch (flags & SOCAM_DATAWIDTH_MASK) {
case SOCAM_DATAWIDTH_10:
dw = 4;
bpp = 0x40;
cicr4 |= CICR4_PCLK_EN;
if (pcdev->platform_flags & PXA_CAMERA_MCLK_EN)
cicr4 |= CICR4_MCLK_EN;
- if (common_flags & SOCAM_PCLK_SAMPLE_FALLING)
+ if (flags & SOCAM_PCLK_SAMPLE_FALLING)
cicr4 |= CICR4_PCP;
- if (common_flags & SOCAM_HSYNC_ACTIVE_LOW)
+ if (flags & SOCAM_HSYNC_ACTIVE_LOW)
cicr4 |= CICR4_HSP;
- if (common_flags & SOCAM_VSYNC_ACTIVE_LOW)
+ if (flags & SOCAM_VSYNC_ACTIVE_LOW)
cicr4 |= CICR4_VSP;
cicr0 = __raw_readl(pcdev->base + CICR0);
if (cicr0 & CICR0_ENB)
__raw_writel(cicr0 & ~CICR0_ENB, pcdev->base + CICR0);
- cicr1 = CICR1_PPL_VAL(icd->width - 1) | bpp | dw;
+ cicr1 = CICR1_PPL_VAL(icd->user_width - 1) | bpp | dw;
switch (pixfmt) {
case V4L2_PIX_FMT_YUV422P:
}
cicr2 = 0;
- cicr3 = CICR3_LPF_VAL(icd->height - 1) |
+ cicr3 = CICR3_LPF_VAL(icd->user_height - 1) |
CICR3_BFW_VAL(min((unsigned short)255, icd->y_skip_top));
- cicr4 |= mclk_get_divisor(pcdev);
+ cicr4 |= pcdev->mclk_divisor;
__raw_writel(cicr1, pcdev->base + CICR1);
__raw_writel(cicr2, pcdev->base + CICR2);
CICR0_SIM_MP : (CICR0_SL_CAP_EN | CICR0_SIM_SP));
cicr0 |= CICR0_DMAEN | CICR0_IRQ_MASK;
__raw_writel(cicr0, pcdev->base + CICR0);
+}
+
+static int pxa_camera_set_bus_param(struct soc_camera_device *icd, __u32 pixfmt)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+ struct pxa_camera_dev *pcdev = ici->priv;
+ unsigned long bus_flags, camera_flags, common_flags;
+ int ret = test_platform_param(pcdev, icd->buswidth, &bus_flags);
+ struct pxa_cam *cam = icd->host_priv;
+
+ if (ret < 0)
+ return ret;
+
+ camera_flags = icd->ops->query_bus_param(icd);
+
+ common_flags = soc_camera_bus_param_compatible(camera_flags, bus_flags);
+ if (!common_flags)
+ return -EINVAL;
+
+ pcdev->channels = 1;
+
+ /* Make choises, based on platform preferences */
+ if ((common_flags & SOCAM_HSYNC_ACTIVE_HIGH) &&
+ (common_flags & SOCAM_HSYNC_ACTIVE_LOW)) {
+ if (pcdev->platform_flags & PXA_CAMERA_HSP)
+ common_flags &= ~SOCAM_HSYNC_ACTIVE_HIGH;
+ else
+ common_flags &= ~SOCAM_HSYNC_ACTIVE_LOW;
+ }
+
+ if ((common_flags & SOCAM_VSYNC_ACTIVE_HIGH) &&
+ (common_flags & SOCAM_VSYNC_ACTIVE_LOW)) {
+ if (pcdev->platform_flags & PXA_CAMERA_VSP)
+ common_flags &= ~SOCAM_VSYNC_ACTIVE_HIGH;
+ else
+ common_flags &= ~SOCAM_VSYNC_ACTIVE_LOW;
+ }
+
+ if ((common_flags & SOCAM_PCLK_SAMPLE_RISING) &&
+ (common_flags & SOCAM_PCLK_SAMPLE_FALLING)) {
+ if (pcdev->platform_flags & PXA_CAMERA_PCP)
+ common_flags &= ~SOCAM_PCLK_SAMPLE_RISING;
+ else
+ common_flags &= ~SOCAM_PCLK_SAMPLE_FALLING;
+ }
+
+ cam->flags = common_flags;
+
+ ret = icd->ops->set_bus_param(icd, common_flags);
+ if (ret < 0)
+ return ret;
+
+ pxa_camera_setup_cicr(icd, common_flags, pixfmt);
return 0;
}
static int pxa_camera_try_bus_param(struct soc_camera_device *icd,
unsigned char buswidth)
{
- struct soc_camera_host *ici =
- to_soc_camera_host(icd->dev.parent);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct pxa_camera_dev *pcdev = ici->priv;
unsigned long bus_flags, camera_flags;
int ret = test_platform_param(pcdev, buswidth, &bus_flags);
static int pxa_camera_get_formats(struct soc_camera_device *icd, int idx,
struct soc_camera_format_xlate *xlate)
{
- struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+ struct device *dev = icd->dev.parent;
int formats = 0, buswidth, ret;
+ struct pxa_cam *cam;
buswidth = required_buswidth(icd->formats + idx);
if (ret < 0)
return 0;
+ if (!icd->host_priv) {
+ cam = kzalloc(sizeof(*cam), GFP_KERNEL);
+ if (!cam)
+ return -ENOMEM;
+
+ icd->host_priv = cam;
+ } else {
+ cam = icd->host_priv;
+ }
+
switch (icd->formats[idx].fourcc) {
case V4L2_PIX_FMT_UYVY:
formats++;
xlate->cam_fmt = icd->formats + idx;
xlate->buswidth = buswidth;
xlate++;
- dev_dbg(&ici->dev, "Providing format %s using %s\n",
+ dev_dbg(dev, "Providing format %s using %s\n",
pxa_camera_formats[0].name,
icd->formats[idx].name);
}
xlate->cam_fmt = icd->formats + idx;
xlate->buswidth = buswidth;
xlate++;
- dev_dbg(&ici->dev, "Providing format %s packed\n",
+ dev_dbg(dev, "Providing format %s packed\n",
icd->formats[idx].name);
}
break;
xlate->cam_fmt = icd->formats + idx;
xlate->buswidth = icd->formats[idx].depth;
xlate++;
- dev_dbg(&ici->dev,
+ dev_dbg(dev,
"Providing format %s in pass-through mode\n",
icd->formats[idx].name);
}
return formats;
}
+static void pxa_camera_put_formats(struct soc_camera_device *icd)
+{
+ kfree(icd->host_priv);
+ icd->host_priv = NULL;
+}
+
+static int pxa_camera_check_frame(struct v4l2_pix_format *pix)
+{
+ /* limit to pxa hardware capabilities */
+ return pix->height < 32 || pix->height > 2048 || pix->width < 48 ||
+ pix->width > 2048 || (pix->width & 0x01);
+}
+
+static int pxa_camera_set_crop(struct soc_camera_device *icd,
+ struct v4l2_crop *a)
+{
+ struct v4l2_rect *rect = &a->c;
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+ struct pxa_camera_dev *pcdev = ici->priv;
+ struct device *dev = icd->dev.parent;
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ struct soc_camera_sense sense = {
+ .master_clock = pcdev->mclk,
+ .pixel_clock_max = pcdev->ciclk / 4,
+ };
+ struct v4l2_format f;
+ struct v4l2_pix_format *pix = &f.fmt.pix, pix_tmp;
+ struct pxa_cam *cam = icd->host_priv;
+ int ret;
+
+ /* If PCLK is used to latch data from the sensor, check sense */
+ if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN)
+ icd->sense = &sense;
+
+ ret = v4l2_subdev_call(sd, video, s_crop, a);
+
+ icd->sense = NULL;
+
+ if (ret < 0) {
+ dev_warn(dev, "Failed to crop to %ux%u@%u:%u\n",
+ rect->width, rect->height, rect->left, rect->top);
+ return ret;
+ }
+
+ f.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+
+ ret = v4l2_subdev_call(sd, video, g_fmt, &f);
+ if (ret < 0)
+ return ret;
+
+ pix_tmp = *pix;
+ if (pxa_camera_check_frame(pix)) {
+ /*
+ * Camera cropping produced a frame beyond our capabilities.
+ * FIXME: just extract a subframe, that we can process.
+ */
+ v4l_bound_align_image(&pix->width, 48, 2048, 1,
+ &pix->height, 32, 2048, 0,
+ icd->current_fmt->fourcc == V4L2_PIX_FMT_YUV422P ?
+ 4 : 0);
+ ret = v4l2_subdev_call(sd, video, s_fmt, &f);
+ if (ret < 0)
+ return ret;
+
+ if (pxa_camera_check_frame(pix)) {
+ dev_warn(icd->dev.parent,
+ "Inconsistent state. Use S_FMT to repair\n");
+ return -EINVAL;
+ }
+ }
+
+ if (sense.flags & SOCAM_SENSE_PCLK_CHANGED) {
+ if (sense.pixel_clock > sense.pixel_clock_max) {
+ dev_err(dev,
+ "pixel clock %lu set by the camera too high!",
+ sense.pixel_clock);
+ return -EIO;
+ }
+ recalculate_fifo_timeout(pcdev, sense.pixel_clock);
+ }
+
+ icd->user_width = pix->width;
+ icd->user_height = pix->height;
+
+ pxa_camera_setup_cicr(icd, cam->flags, icd->current_fmt->fourcc);
+
+ return ret;
+}
+
static int pxa_camera_set_fmt(struct soc_camera_device *icd,
- __u32 pixfmt, struct v4l2_rect *rect)
+ struct v4l2_format *f)
{
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
- const struct soc_camera_data_format *host_fmt, *cam_fmt = NULL;
- const struct soc_camera_format_xlate *xlate;
- int ret, buswidth;
+ struct pxa_camera_dev *pcdev = ici->priv;
+ struct device *dev = icd->dev.parent;
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ const struct soc_camera_data_format *cam_fmt = NULL;
+ const struct soc_camera_format_xlate *xlate = NULL;
+ struct soc_camera_sense sense = {
+ .master_clock = pcdev->mclk,
+ .pixel_clock_max = pcdev->ciclk / 4,
+ };
+ struct v4l2_pix_format *pix = &f->fmt.pix;
+ struct v4l2_format cam_f = *f;
+ int ret;
- xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
+ xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat);
if (!xlate) {
- dev_warn(&ici->dev, "Format %x not found\n", pixfmt);
+ dev_warn(dev, "Format %x not found\n", pix->pixelformat);
return -EINVAL;
}
- buswidth = xlate->buswidth;
- host_fmt = xlate->host_fmt;
cam_fmt = xlate->cam_fmt;
- switch (pixfmt) {
- case 0: /* Only geometry change */
- ret = icd->ops->set_fmt(icd, pixfmt, rect);
- break;
- default:
- ret = icd->ops->set_fmt(icd, cam_fmt->fourcc, rect);
+ /* If PCLK is used to latch data from the sensor, check sense */
+ if (pcdev->platform_flags & PXA_CAMERA_PCLK_EN)
+ icd->sense = &sense;
+
+ cam_f.fmt.pix.pixelformat = cam_fmt->fourcc;
+ ret = v4l2_subdev_call(sd, video, s_fmt, &cam_f);
+ cam_f.fmt.pix.pixelformat = pix->pixelformat;
+ *pix = cam_f.fmt.pix;
+
+ icd->sense = NULL;
+
+ if (ret < 0) {
+ dev_warn(dev, "Failed to configure for format %x\n",
+ pix->pixelformat);
+ } else if (pxa_camera_check_frame(pix)) {
+ dev_warn(dev,
+ "Camera driver produced an unsupported frame %dx%d\n",
+ pix->width, pix->height);
+ ret = -EINVAL;
+ } else if (sense.flags & SOCAM_SENSE_PCLK_CHANGED) {
+ if (sense.pixel_clock > sense.pixel_clock_max) {
+ dev_err(dev,
+ "pixel clock %lu set by the camera too high!",
+ sense.pixel_clock);
+ return -EIO;
+ }
+ recalculate_fifo_timeout(pcdev, sense.pixel_clock);
}
- if (ret < 0)
- dev_warn(&ici->dev, "Failed to configure for format %x\n",
- pixfmt);
-
- if (pixfmt && !ret) {
- icd->buswidth = buswidth;
- icd->current_fmt = host_fmt;
+ if (!ret) {
+ icd->buswidth = xlate->buswidth;
+ icd->current_fmt = xlate->host_fmt;
}
return ret;
struct v4l2_format *f)
{
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
const struct soc_camera_format_xlate *xlate;
struct v4l2_pix_format *pix = &f->fmt.pix;
__u32 pixfmt = pix->pixelformat;
+ enum v4l2_field field;
+ int ret;
xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
if (!xlate) {
- dev_warn(&ici->dev, "Format %x not found\n", pixfmt);
+ dev_warn(ici->v4l2_dev.dev, "Format %x not found\n", pixfmt);
return -EINVAL;
}
- /* limit to pxa hardware capabilities */
- if (pix->height < 32)
- pix->height = 32;
- if (pix->height > 2048)
- pix->height = 2048;
- if (pix->width < 48)
- pix->width = 48;
- if (pix->width > 2048)
- pix->width = 2048;
- pix->width &= ~0x01;
+ /*
+ * Limit to pxa hardware capabilities. YUV422P planar format requires
+ * images size to be a multiple of 16 bytes. If not, zeros will be
+ * inserted between Y and U planes, and U and V planes, which violates
+ * the YUV422P standard.
+ */
+ v4l_bound_align_image(&pix->width, 48, 2048, 1,
+ &pix->height, 32, 2048, 0,
+ pixfmt == V4L2_PIX_FMT_YUV422P ? 4 : 0);
pix->bytesperline = pix->width *
DIV_ROUND_UP(xlate->host_fmt->depth, 8);
pix->sizeimage = pix->height * pix->bytesperline;
+ /* camera has to see its format, but the user the original one */
+ pix->pixelformat = xlate->cam_fmt->fourcc;
/* limit to sensor capabilities */
- return icd->ops->try_fmt(icd, f);
+ ret = v4l2_subdev_call(sd, video, try_fmt, f);
+ pix->pixelformat = pixfmt;
+
+ field = pix->field;
+
+ if (field == V4L2_FIELD_ANY) {
+ pix->field = V4L2_FIELD_NONE;
+ } else if (field != V4L2_FIELD_NONE) {
+ dev_err(icd->dev.parent, "Field type %d unsupported.\n", field);
+ return -EINVAL;
+ }
+
+ return ret;
}
static int pxa_camera_reqbufs(struct soc_camera_file *icf,
static int pxa_camera_suspend(struct soc_camera_device *icd, pm_message_t state)
{
- struct soc_camera_host *ici =
- to_soc_camera_host(icd->dev.parent);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct pxa_camera_dev *pcdev = ici->priv;
int i = 0, ret = 0;
static int pxa_camera_resume(struct soc_camera_device *icd)
{
- struct soc_camera_host *ici =
- to_soc_camera_host(icd->dev.parent);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct pxa_camera_dev *pcdev = ici->priv;
int i = 0, ret = 0;
ret = pcdev->icd->ops->resume(pcdev->icd);
/* Restart frame capture if active buffer exists */
- if (!ret && pcdev->active) {
- unsigned long cifr, cicr0;
-
- /* Reset the FIFOs */
- cifr = __raw_readl(pcdev->base + CIFR) | CIFR_RESET_F;
- __raw_writel(cifr, pcdev->base + CIFR);
-
- cicr0 = __raw_readl(pcdev->base + CICR0);
- cicr0 &= ~CICR0_EOFM; /* Enable End-Of-Frame Interrupt */
- cicr0 |= CICR0_ENB; /* Restart the Capture Interface */
- __raw_writel(cicr0, pcdev->base + CICR0);
- }
+ if (!ret && pcdev->active)
+ pxa_camera_start_capture(pcdev);
return ret;
}
.remove = pxa_camera_remove_device,
.suspend = pxa_camera_suspend,
.resume = pxa_camera_resume,
+ .set_crop = pxa_camera_set_crop,
.get_formats = pxa_camera_get_formats,
+ .put_formats = pxa_camera_put_formats,
.set_fmt = pxa_camera_set_fmt,
.try_fmt = pxa_camera_try_fmt,
.init_videobuf = pxa_camera_init_videobuf,
.set_bus_param = pxa_camera_set_bus_param,
};
-/* Should be allocated dynamically too, but we have only one. */
-static struct soc_camera_host pxa_soc_camera_host = {
- .drv_name = PXA_CAM_DRV_NAME,
- .ops = &pxa_soc_camera_host_ops,
-};
-
-static int pxa_camera_probe(struct platform_device *pdev)
+static int __devinit pxa_camera_probe(struct platform_device *pdev)
{
struct pxa_camera_dev *pcdev;
struct resource *res;
goto exit;
}
- pcdev->clk = clk_get(&pdev->dev, "CAMCLK");
+ pcdev->clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(pcdev->clk)) {
err = PTR_ERR(pcdev->clk);
goto exit_kfree;
}
- dev_set_drvdata(&pdev->dev, pcdev);
pcdev->res = res;
pcdev->pdata = pdev->dev.platform_data;
"data widths, using default 10 bit\n");
pcdev->platform_flags |= PXA_CAMERA_DATAWIDTH_10;
}
- pcdev->platform_mclk_10khz = pcdev->pdata->mclk_10khz;
- if (!pcdev->platform_mclk_10khz) {
+ pcdev->mclk = pcdev->pdata->mclk_10khz * 10000;
+ if (!pcdev->mclk) {
dev_warn(&pdev->dev,
- "mclk_10khz == 0! Please, fix your platform data. "
+ "mclk == 0! Please, fix your platform data. "
"Using default 20MHz\n");
- pcdev->platform_mclk_10khz = 2000;
+ pcdev->mclk = 20000000;
}
+ pcdev->mclk_divisor = mclk_get_divisor(pdev, pcdev);
+
INIT_LIST_HEAD(&pcdev->capture);
spin_lock_init(&pcdev->lock);
/*
* Request the regions.
*/
- if (!request_mem_region(res->start, res->end - res->start + 1,
+ if (!request_mem_region(res->start, resource_size(res),
PXA_CAM_DRV_NAME)) {
err = -EBUSY;
goto exit_clk;
}
- base = ioremap(res->start, res->end - res->start + 1);
+ base = ioremap(res->start, resource_size(res));
if (!base) {
err = -ENOMEM;
goto exit_release;
}
pcdev->irq = irq;
pcdev->base = base;
- pcdev->dev = &pdev->dev;
/* request dma */
err = pxa_request_dma("CI_Y", DMA_PRIO_HIGH,
pxa_camera_dma_irq_y, pcdev);
if (err < 0) {
- dev_err(pcdev->dev, "Can't request DMA for Y\n");
+ dev_err(&pdev->dev, "Can't request DMA for Y\n");
goto exit_iounmap;
}
pcdev->dma_chans[0] = err;
- dev_dbg(pcdev->dev, "got DMA channel %d\n", pcdev->dma_chans[0]);
+ dev_dbg(&pdev->dev, "got DMA channel %d\n", pcdev->dma_chans[0]);
err = pxa_request_dma("CI_U", DMA_PRIO_HIGH,
pxa_camera_dma_irq_u, pcdev);
if (err < 0) {
- dev_err(pcdev->dev, "Can't request DMA for U\n");
+ dev_err(&pdev->dev, "Can't request DMA for U\n");
goto exit_free_dma_y;
}
pcdev->dma_chans[1] = err;
- dev_dbg(pcdev->dev, "got DMA channel (U) %d\n", pcdev->dma_chans[1]);
+ dev_dbg(&pdev->dev, "got DMA channel (U) %d\n", pcdev->dma_chans[1]);
err = pxa_request_dma("CI_V", DMA_PRIO_HIGH,
pxa_camera_dma_irq_v, pcdev);
if (err < 0) {
- dev_err(pcdev->dev, "Can't request DMA for V\n");
+ dev_err(&pdev->dev, "Can't request DMA for V\n");
goto exit_free_dma_u;
}
pcdev->dma_chans[2] = err;
- dev_dbg(pcdev->dev, "got DMA channel (V) %d\n", pcdev->dma_chans[2]);
+ dev_dbg(&pdev->dev, "got DMA channel (V) %d\n", pcdev->dma_chans[2]);
DRCMR(68) = pcdev->dma_chans[0] | DRCMR_MAPVLD;
DRCMR(69) = pcdev->dma_chans[1] | DRCMR_MAPVLD;
err = request_irq(pcdev->irq, pxa_camera_irq, 0, PXA_CAM_DRV_NAME,
pcdev);
if (err) {
- dev_err(pcdev->dev, "Camera interrupt register failed \n");
+ dev_err(&pdev->dev, "Camera interrupt register failed \n");
goto exit_free_dma;
}
- pxa_soc_camera_host.priv = pcdev;
- pxa_soc_camera_host.dev.parent = &pdev->dev;
- pxa_soc_camera_host.nr = pdev->id;
- err = soc_camera_host_register(&pxa_soc_camera_host);
+ pcdev->soc_host.drv_name = PXA_CAM_DRV_NAME;
+ pcdev->soc_host.ops = &pxa_soc_camera_host_ops;
+ pcdev->soc_host.priv = pcdev;
+ pcdev->soc_host.v4l2_dev.dev = &pdev->dev;
+ pcdev->soc_host.nr = pdev->id;
+
+ err = soc_camera_host_register(&pcdev->soc_host);
if (err)
goto exit_free_irq;
exit_iounmap:
iounmap(base);
exit_release:
- release_mem_region(res->start, res->end - res->start + 1);
+ release_mem_region(res->start, resource_size(res));
exit_clk:
clk_put(pcdev->clk);
exit_kfree:
static int __devexit pxa_camera_remove(struct platform_device *pdev)
{
- struct pxa_camera_dev *pcdev = platform_get_drvdata(pdev);
+ struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
+ struct pxa_camera_dev *pcdev = container_of(soc_host,
+ struct pxa_camera_dev, soc_host);
struct resource *res;
clk_put(pcdev->clk);
pxa_free_dma(pcdev->dma_chans[2]);
free_irq(pcdev->irq, pcdev);
- soc_camera_host_unregister(&pxa_soc_camera_host);
+ soc_camera_host_unregister(soc_host);
iounmap(pcdev->base);
res = pcdev->res;
- release_mem_region(res->start, res->end - res->start + 1);
+ release_mem_region(res->start, resource_size(res));
kfree(pcdev);
.name = PXA_CAM_DRV_NAME,
},
.probe = pxa_camera_probe,
- .remove = __exit_p(pxa_camera_remove),
+ .remove = __devexit_p(pxa_camera_remove),
};
-static int __devinit pxa_camera_init(void)
+static int __init pxa_camera_init(void)
{
return platform_driver_register(&pxa_camera_driver);
}
MODULE_DESCRIPTION("PXA27x SoC Camera Host driver");
MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" PXA_CAM_DRV_NAME);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff