--- /dev/null
+#include <media/v4l2-dev.h>
+#include <media/videobuf-core.h>
+#include <media/v4l2-ioctl.h>
+#include <linux/pci.h>
+#include <linux/version.h>
+#include <linux/stringify.h>
+#include <media/videobuf-dma-contig.h>
+#include <linux/kthread.h>
+
+#include "dt3155v4l.h"
+#include "dt3155-bufs.h"
+
+#define DT3155_VENDOR_ID 0x8086
+#define DT3155_DEVICE_ID 0x1223
+
+/* global initializers (for all boards) */
+#ifdef CONFIG_DT3155_CCIR
+static const u8 csr2_init = VT_50HZ;
+#define DT3155_CURRENT_NORM V4L2_STD_625_50
+static const unsigned int img_width = 768;
+static const unsigned int img_height = 576;
+static const unsigned int frames_per_sec = 25;
+static const struct v4l2_fmtdesc frame_std[] = {
+ {
+ .index = 0,
+ .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
+ .flags = 0,
+ .description = "CCIR/50Hz 8 bits gray",
+ .pixelformat = V4L2_PIX_FMT_GREY,
+ },
+};
+#else
+static const u8 csr2_init = VT_60HZ;
+#define DT3155_CURRENT_NORM V4L2_STD_525_60
+static const unsigned int img_width = 640;
+static const unsigned int img_height = 480;
+static const unsigned int frames_per_sec = 30;
+static const struct v4l2_fmtdesc frame_std[] = {
+ {
+ .index = 0,
+ .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
+ .flags = 0,
+ .description = "RS-170/60Hz 8 bits gray",
+ .pixelformat = V4L2_PIX_FMT_GREY,
+ },
+};
+#endif
+
+#define NUM_OF_FORMATS ARRAY_SIZE(frame_std)
+
+static u8 config_init = ACQ_MODE_EVEN;
+
+/**
+ * read_i2c_reg - reads an internal i2c register
+ *
+ * @addr: dt3155 mmio base address
+ * @index: index (internal address) of register to read
+ * @data: pointer to byte the read data will be placed in
+ *
+ * returns: zero on success or error code
+ *
+ * This function starts reading the specified (by index) register
+ * and busy waits for the process to finish. The result is placed
+ * in a byte pointed by data.
+ */
+static int
+read_i2c_reg(void *addr, u8 index, u8 *data)
+{
+ u32 tmp = index;
+
+ iowrite32((tmp<<17) | IIC_READ, addr + IIC_CSR2);
+ mmiowb();
+ udelay(45); /* wait at least 43 usec for NEW_CYCLE to clear */
+ if (ioread32(addr + IIC_CSR2) & NEW_CYCLE) {
+ /* error: NEW_CYCLE not cleared */
+ printk(KERN_ERR "dt3155: NEW_CYCLE not cleared\n");
+ return -EIO;
+ }
+ tmp = ioread32(addr + IIC_CSR1);
+ if (tmp & DIRECT_ABORT) {
+ /* error: DIRECT_ABORT set */
+ printk(KERN_ERR "dt3155: DIRECT_ABORT set\n");
+ /* reset DIRECT_ABORT bit */
+ iowrite32(DIRECT_ABORT, addr + IIC_CSR1);
+ return -EIO;
+ }
+ *data = tmp>>24;
+ return 0;
+}
+
+/**
+ * write_i2c_reg - writes to an internal i2c register
+ *
+ * @addr: dt3155 mmio base address
+ * @index: index (internal address) of register to read
+ * @data: data to be written
+ *
+ * returns: zero on success or error code
+ *
+ * This function starts writting the specified (by index) register
+ * and busy waits for the process to finish.
+ */
+static int
+write_i2c_reg(void *addr, u8 index, u8 data)
+{
+ u32 tmp = index;
+
+ iowrite32((tmp<<17) | IIC_WRITE | data, addr + IIC_CSR2);
+ mmiowb();
+ udelay(65); /* wait at least 63 usec for NEW_CYCLE to clear */
+ if (ioread32(addr + IIC_CSR2) & NEW_CYCLE) {
+ /* error: NEW_CYCLE not cleared */
+ printk(KERN_ERR "dt3155: NEW_CYCLE not cleared\n");
+ return -EIO;
+ }
+ if (ioread32(addr + IIC_CSR1) & DIRECT_ABORT) {
+ /* error: DIRECT_ABORT set */
+ printk(KERN_ERR "dt3155: DIRECT_ABORT set\n");
+ /* reset DIRECT_ABORT bit */
+ iowrite32(DIRECT_ABORT, addr + IIC_CSR1);
+ return -EIO;
+ }
+ return 0;
+}
+
+/**
+ * write_i2c_reg_nowait - writes to an internal i2c register
+ *
+ * @addr: dt3155 mmio base address
+ * @index: index (internal address) of register to read
+ * @data: data to be written
+ *
+ * This function starts writting the specified (by index) register
+ * and then returns.
+ */
+void
+write_i2c_reg_nowait(void *addr, u8 index, u8 data)
+{
+ u32 tmp = index;
+
+ iowrite32((tmp<<17) | IIC_WRITE | data, addr + IIC_CSR2);
+ mmiowb();
+}
+
+/**
+ * wait_i2c_reg - waits the read/write to finish
+ *
+ * @addr: dt3155 mmio base address
+ *
+ * returns: zero on success or error code
+ *
+ * This function waits reading/writting to finish.
+ */
+static int
+wait_i2c_reg(void *addr)
+{
+ if (ioread32(addr + IIC_CSR2) & NEW_CYCLE)
+ udelay(65); /* wait at least 63 usec for NEW_CYCLE to clear */
+ if (ioread32(addr + IIC_CSR2) & NEW_CYCLE) {
+ /* error: NEW_CYCLE not cleared */
+ printk(KERN_ERR "dt3155: NEW_CYCLE not cleared\n");
+ return -EIO;
+ }
+ if (ioread32(addr + IIC_CSR1) & DIRECT_ABORT) {
+ /* error: DIRECT_ABORT set */
+ printk(KERN_ERR "dt3155: DIRECT_ABORT set\n");
+ /* reset DIRECT_ABORT bit */
+ iowrite32(DIRECT_ABORT, addr + IIC_CSR1);
+ return -EIO;
+ }
+ return 0;
+}
+
+/*
+ * global pointers to a list of 4MB chunks reserved at driver
+ * load, broken down to contiguous buffers of 768 * 576 bytes
+ * each to form a pool of buffers for allocations
+ * FIXME: add spinlock to protect moves between alloc/free lists
+ */
+static struct dt3155_fifo *dt3155_chunks; /* list of 4MB chuncks */
+static struct dt3155_fifo *dt3155_free_bufs; /* list of free buffers */
+static struct dt3155_fifo *dt3155_alloc_bufs; /* list of allocated buffers */
+
+/* same as in <drivers/media/video/videobuf-dma-contig.c> */
+struct videobuf_dma_contig_memory {
+ u32 magic;
+ void *vaddr;
+ dma_addr_t dma_handle;
+ unsigned long size;
+ int is_userptr;
+};
+
+#define MAGIC_DC_MEM 0x0733ac61
+#define MAGIC_CHECK(is, should) \
+ if (unlikely((is) != (should))) { \
+ pr_err("magic mismatch: %x expected %x\n", (is), (should)); \
+ BUG(); \
+ }
+
+/* helper functions to allocate/free buffers from the pool */
+static void *
+dt3155_alloc_buffer(struct device *dev, size_t size, dma_addr_t *dma_handle,
+ gfp_t flag)
+{
+ struct dt3155_buf *buf;
+
+ if (size > DT3155_BUF_SIZE)
+ return NULL;
+ size = DT3155_BUF_SIZE; /* same for CCIR & RS-170 */
+ buf = dt3155_get_buf(dt3155_free_bufs);
+ if (!buf)
+ return NULL;
+ buf->dma = dma_map_single(dev, buf->cpu, size, DMA_FROM_DEVICE);
+ if (dma_mapping_error(dev, buf->dma)) {
+ dt3155_put_buf(buf, dt3155_free_bufs);
+ return NULL;
+ }
+ dt3155_put_buf(buf, dt3155_alloc_bufs);
+ *dma_handle = buf->dma;
+ return buf->cpu;
+}
+
+static void
+dt3155_free_buffer(struct device *dev, size_t size, void *cpu_addr,
+ dma_addr_t dma_handle)
+{
+ struct dt3155_buf *buf, *last;
+ int found = 0;
+
+ if (!cpu_addr) /* to free NULL is OK */
+ return;
+ last = dt3155_get_buf(dt3155_alloc_bufs);
+ if (!last) {
+ printk(KERN_ERR "dt3155: %s(): no alloc buffers\n", __func__);
+ return;
+ }
+ dt3155_put_buf(last, dt3155_alloc_bufs);
+ do {
+ buf = dt3155_get_buf(dt3155_alloc_bufs);
+ if (buf->cpu == cpu_addr && buf->dma == dma_handle) {
+ found = 1;
+ break;
+ }
+ dt3155_put_buf(buf, dt3155_alloc_bufs);
+ } while (buf != last);
+ if (!found) {
+ printk(KERN_ERR "dt3155: %s(): buffer not found\n", __func__);
+ return;
+ }
+ size = DT3155_BUF_SIZE; /* same for CCIR & RS-170 */
+ dma_unmap_single(dev, dma_handle, size, DMA_FROM_DEVICE);
+ dt3155_put_buf(buf, dt3155_free_bufs);
+}
+
+/* same as videobuf_dma_contig_user_get() */
+static int
+dt3155_dma_contig_user_get(struct videobuf_dma_contig_memory *mem,
+ struct videobuf_buffer *vb)
+{
+ struct mm_struct *mm = current->mm;
+ struct vm_area_struct *vma;
+ unsigned long prev_pfn, this_pfn;
+ unsigned long pages_done, user_address;
+ int ret;
+
+ mem->size = PAGE_ALIGN(vb->size);
+ mem->is_userptr = 0;
+ ret = -EINVAL;
+
+ down_read(&mm->mmap_sem);
+
+ vma = find_vma(mm, vb->baddr);
+ if (!vma)
+ goto out_up;
+
+ if ((vb->baddr + mem->size) > vma->vm_end)
+ goto out_up;
+
+ pages_done = 0;
+ prev_pfn = 0; /* kill warning */
+ user_address = vb->baddr;
+
+ while (pages_done < (mem->size >> PAGE_SHIFT)) {
+ ret = follow_pfn(vma, user_address, &this_pfn);
+ if (ret)
+ break;
+
+ if (pages_done == 0)
+ mem->dma_handle = this_pfn << PAGE_SHIFT;
+ else if (this_pfn != (prev_pfn + 1))
+ ret = -EFAULT;
+
+ if (ret)
+ break;
+
+ prev_pfn = this_pfn;
+ user_address += PAGE_SIZE;
+ pages_done++;
+ }
+
+ if (!ret)
+ mem->is_userptr = 1;
+
+ out_up:
+ up_read(¤t->mm->mmap_sem);
+
+ return ret;
+}
+
+/* same as videobuf_dma_contig_user_put() */
+static void
+dt3155_dma_contig_user_put(struct videobuf_dma_contig_memory *mem)
+{
+ mem->is_userptr = 0;
+ mem->dma_handle = 0;
+ mem->size = 0;
+}
+
+/* same as videobuf_iolock() but uses allocations from the pool */
+static int
+dt3155_iolock(struct videobuf_queue *q, struct videobuf_buffer *vb,
+ struct v4l2_framebuffer *fbuf)
+{
+ struct videobuf_dma_contig_memory *mem = vb->priv;
+
+ BUG_ON(!mem);
+ MAGIC_CHECK(mem->magic, MAGIC_DC_MEM);
+
+ switch (vb->memory) {
+ case V4L2_MEMORY_MMAP:
+ dev_dbg(q->dev, "%s memory method MMAP\n", __func__);
+
+ /* All handling should be done by __videobuf_mmap_mapper() */
+ if (!mem->vaddr) {
+ dev_err(q->dev, "memory is not alloced/mmapped.\n");
+ return -EINVAL;
+ }
+ break;
+ case V4L2_MEMORY_USERPTR:
+ dev_dbg(q->dev, "%s memory method USERPTR\n", __func__);
+
+ /* handle pointer from user space */
+ if (vb->baddr)
+ return dt3155_dma_contig_user_get(mem, vb);
+
+ /* allocate memory for the read() method */
+ mem->size = PAGE_ALIGN(vb->size);
+ mem->vaddr = dt3155_alloc_buffer(q->dev, mem->size,
+ &mem->dma_handle, GFP_KERNEL);
+ if (!mem->vaddr) {
+ dev_err(q->dev, "dma_alloc_coherent %ld failed\n",
+ mem->size);
+ return -ENOMEM;
+ }
+
+ dev_dbg(q->dev, "dma_alloc_coherent data is at %p (%ld)\n",
+ mem->vaddr, mem->size);
+ break;
+ case V4L2_MEMORY_OVERLAY:
+ default:
+ dev_dbg(q->dev, "%s memory method OVERLAY/unknown\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/* same as videobuf_dma_contig_free() but uses the pool */
+void
+dt3155_dma_contig_free(struct videobuf_queue *q, struct videobuf_buffer *buf)
+{
+ struct videobuf_dma_contig_memory *mem = buf->priv;
+
+ /* mmapped memory can't be freed here, otherwise mmapped region
+ would be released, while still needed. In this case, the memory
+ release should happen inside videobuf_vm_close().
+ So, it should free memory only if the memory were allocated for
+ read() operation.
+ */
+ if (buf->memory != V4L2_MEMORY_USERPTR)
+ return;
+
+ if (!mem)
+ return;
+
+ MAGIC_CHECK(mem->magic, MAGIC_DC_MEM);
+
+ /* handle user space pointer case */
+ if (buf->baddr) {
+ dt3155_dma_contig_user_put(mem);
+ return;
+ }
+
+ /* read() method */
+ dt3155_free_buffer(q->dev, mem->size, mem->vaddr, mem->dma_handle);
+ mem->vaddr = NULL;
+}
+
+/* same as videobuf_vm_open() */
+static void
+dt3155_vm_open(struct vm_area_struct *vma)
+{
+ struct videobuf_mapping *map = vma->vm_private_data;
+
+ dev_dbg(map->q->dev, "vm_open %p [count=%u,vma=%08lx-%08lx]\n",
+ map, map->count, vma->vm_start, vma->vm_end);
+
+ map->count++;
+}
+
+/* same as videobuf_vm_close(), but free to the pool */
+static void
+dt3155_vm_close(struct vm_area_struct *vma)
+{
+ struct videobuf_mapping *map = vma->vm_private_data;
+ struct videobuf_queue *q = map->q;
+ int i;
+
+ dev_dbg(map->q->dev, "vm_close %p [count=%u,vma=%08lx-%08lx]\n",
+ map, map->count, vma->vm_start, vma->vm_end);
+
+ map->count--;
+ if (0 == map->count) {
+ struct videobuf_dma_contig_memory *mem;
+
+ dev_dbg(map->q->dev, "munmap %p q=%p\n", map, q);
+ mutex_lock(&q->vb_lock);
+
+ /* We need first to cancel streams, before unmapping */
+ if (q->streaming)
+ videobuf_queue_cancel(q);
+
+ for (i = 0; i < VIDEO_MAX_FRAME; i++) {
+ if (NULL == q->bufs[i])
+ continue;
+
+ if (q->bufs[i]->map != map)
+ continue;
+
+ mem = q->bufs[i]->priv;
+ if (mem) {
+ /* This callback is called only if kernel has
+ allocated memory and this memory is mmapped.
+ In this case, memory should be freed,
+ in order to do memory unmap.
+ */
+
+ MAGIC_CHECK(mem->magic, MAGIC_DC_MEM);
+
+ /* vfree is not atomic - can't be
+ called with IRQ's disabled
+ */
+ dev_dbg(map->q->dev, "buf[%d] freeing %p\n",
+ i, mem->vaddr);
+
+ dt3155_free_buffer(q->dev, mem->size,
+ mem->vaddr, mem->dma_handle);
+ mem->vaddr = NULL;
+ }
+
+ q->bufs[i]->map = NULL;
+ q->bufs[i]->baddr = 0;
+ }
+
+ kfree(map);
+
+ mutex_unlock(&q->vb_lock);
+ }
+}
+
+static const struct vm_operations_struct dt3155_vm_ops = {
+ .open = dt3155_vm_open,
+ .close = dt3155_vm_close,
+};
+
+/* same as videobuf_mmap_mapper(), but allocates from the pool */
+static int
+dt3155_mmap_mapper(struct videobuf_queue *q, struct vm_area_struct *vma)
+{
+ struct videobuf_dma_contig_memory *mem;
+ struct videobuf_mapping *map;
+ unsigned int first;
+ int retval;
+ unsigned long size, offset = vma->vm_pgoff << PAGE_SHIFT;
+
+ dev_dbg(q->dev, "%s\n", __func__);
+ if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
+ return -EINVAL;
+
+ /* look for first buffer to map */
+ for (first = 0; first < VIDEO_MAX_FRAME; first++) {
+ if (!q->bufs[first])
+ continue;
+
+ if (V4L2_MEMORY_MMAP != q->bufs[first]->memory)
+ continue;
+ if (q->bufs[first]->boff == offset)
+ break;
+ }
+ if (VIDEO_MAX_FRAME == first) {
+ dev_dbg(q->dev, "invalid user space offset [offset=0x%lx]\n",
+ offset);
+ return -EINVAL;
+ }
+
+ /* create mapping + update buffer list */
+ map = kzalloc(sizeof(struct videobuf_mapping), GFP_KERNEL);
+ if (!map)
+ return -ENOMEM;
+
+ q->bufs[first]->map = map;
+ map->start = vma->vm_start;
+ map->end = vma->vm_end;
+ map->q = q;
+
+ q->bufs[first]->baddr = vma->vm_start;
+
+ mem = q->bufs[first]->priv;
+ BUG_ON(!mem);
+ MAGIC_CHECK(mem->magic, MAGIC_DC_MEM);
+
+ mem->size = PAGE_ALIGN(q->bufs[first]->bsize);
+ mem->vaddr = dt3155_alloc_buffer(q->dev, mem->size,
+ &mem->dma_handle, GFP_KERNEL);
+ if (!mem->vaddr) {
+ dev_err(q->dev, "dma_alloc_coherent size %ld failed\n",
+ mem->size);
+ goto error;
+ }
+ dev_dbg(q->dev, "dma_alloc_coherent data is at addr %p (size %ld)\n",
+ mem->vaddr, mem->size);
+
+ /* Try to remap memory */
+
+ size = vma->vm_end - vma->vm_start;
+ size = (size < mem->size) ? size : mem->size;
+
+ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+ retval = remap_pfn_range(vma, vma->vm_start,
+ mem->dma_handle >> PAGE_SHIFT,
+ size, vma->vm_page_prot);
+ if (retval) {
+ dev_err(q->dev, "mmap: remap failed with error %d. ", retval);
+ dt3155_free_buffer(q->dev, mem->size,
+ mem->vaddr, mem->dma_handle);
+ goto error;
+ }
+
+ vma->vm_ops = &dt3155_vm_ops;
+ vma->vm_flags |= VM_DONTEXPAND;
+ vma->vm_private_data = map;
+
+ dev_dbg(q->dev, "mmap %p: q=%p %08lx-%08lx (%lx) pgoff %08lx buf %d\n",
+ map, q, vma->vm_start, vma->vm_end,
+ (long int) q->bufs[first]->bsize,
+ vma->vm_pgoff, first);
+
+ dt3155_vm_open(vma);
+
+ return 0;
+
+error:
+ kfree(map);
+ return -ENOMEM;
+}
+
+static int
+dt3155_sync_for_cpu(struct videobuf_queue *q, struct videobuf_buffer *vb)
+{
+ struct dt3155_priv *pd = q->priv_data;
+ struct videobuf_dma_contig_memory *mem = vb->priv;
+
+ BUG_ON(!mem);
+ MAGIC_CHECK(mem->magic, MAGIC_DC_MEM);
+
+ pci_dma_sync_single_for_cpu(pd->pdev, mem->dma_handle,
+ mem->size, PCI_DMA_FROMDEVICE);
+ return 0;
+}
+
+static int
+dt3155_sync_for_device(struct videobuf_queue *q, struct videobuf_buffer *vb)
+{
+ struct dt3155_priv *pd = q->priv_data;
+ struct videobuf_dma_contig_memory *mem = vb->priv;
+
+ BUG_ON(!mem);
+ MAGIC_CHECK(mem->magic, MAGIC_DC_MEM);
+
+ pci_dma_sync_single_for_device(pd->pdev, mem->dma_handle,
+ mem->size, PCI_DMA_FROMDEVICE);
+ return 0;
+}
+
+/*
+ * same as videobuf_queue_dma_contig_init(), but after
+ * initialisation overwrites videobuf_iolock() and
+ * videobuf_mmap_mapper() with our customized versions
+ * as well as adds sync() method
+ */
+static void
+dt3155_queue_dma_contig_init(struct videobuf_queue *q,
+ struct videobuf_queue_ops *ops,
+ struct device *dev,
+ spinlock_t *irqlock,
+ enum v4l2_buf_type type,
+ enum v4l2_field field,
+ unsigned int msize,
+ void *priv)
+{
+ videobuf_queue_dma_contig_init(q, ops, dev, irqlock,
+ type, field, msize, priv);
+ /* overwrite with our methods */
+ q->int_ops->iolock = dt3155_iolock;
+ q->int_ops->mmap_mapper = dt3155_mmap_mapper;
+ q->int_ops->sync = dt3155_sync_for_cpu;
+}
+
+static int
+dt3155_start_acq(struct dt3155_priv *pd)
+{
+ struct videobuf_buffer *vb = pd->curr_buf;
+ dma_addr_t dma_addr;
+
+ dma_addr = videobuf_to_dma_contig(vb);
+ iowrite32(dma_addr, pd->regs + EVEN_DMA_START);
+ iowrite32(dma_addr + vb->width, pd->regs + ODD_DMA_START);
+ iowrite32(vb->width, pd->regs + EVEN_DMA_STRIDE);
+ iowrite32(vb->width, pd->regs + ODD_DMA_STRIDE);
+ /* enable interrupts, clear all irq flags */
+ iowrite32(FLD_START_EN | FLD_END_ODD_EN | FLD_START |
+ FLD_END_EVEN | FLD_END_ODD, pd->regs + INT_CSR);
+ iowrite32(FIFO_EN | SRST | FLD_CRPT_ODD | FLD_CRPT_EVEN |
+ FLD_DN_ODD | FLD_DN_EVEN | CAP_CONT_EVEN | CAP_CONT_ODD,
+ pd->regs + CSR1);
+ wait_i2c_reg(pd->regs);
+ write_i2c_reg(pd->regs, CONFIG, pd->config);
+ write_i2c_reg(pd->regs, EVEN_CSR, CSR_ERROR | CSR_DONE);
+ write_i2c_reg(pd->regs, ODD_CSR, CSR_ERROR | CSR_DONE);
+
+ /* start the board */
+ write_i2c_reg(pd->regs, CSR2, pd->csr2 | BUSY_EVEN | BUSY_ODD);
+ return 0; /* success */
+}
+
+static int
+dt3155_stop_acq(struct dt3155_priv *pd)
+{
+ int tmp;
+
+ /* stop the board */
+ wait_i2c_reg(pd->regs);
+ write_i2c_reg(pd->regs, CSR2, pd->csr2);
+
+ /* disable all irqs, clear all irq flags */
+ iowrite32(FLD_START | FLD_END_EVEN | FLD_END_ODD, pd->regs + INT_CSR);
+ write_i2c_reg(pd->regs, EVEN_CSR, CSR_ERROR | CSR_DONE);
+ write_i2c_reg(pd->regs, ODD_CSR, CSR_ERROR | CSR_DONE);
+ tmp = ioread32(pd->regs + CSR1) & (FLD_CRPT_EVEN | FLD_CRPT_ODD);
+ if (tmp)
+ printk(KERN_ERR "dt3155: corrupted field %u\n", tmp);
+ iowrite32(FIFO_EN | SRST | FLD_CRPT_ODD | FLD_CRPT_EVEN |
+ FLD_DN_ODD | FLD_DN_EVEN | CAP_CONT_EVEN | CAP_CONT_ODD,
+ pd->regs + CSR1);
+ return 0;
+}
+
+/* Locking: Caller holds q->vb_lock */
+static int
+dt3155_buf_setup(struct videobuf_queue *q, unsigned int *count,
+ unsigned int *size)
+{
+ *size = img_width * img_height;
+ return 0;
+}
+
+/* Locking: Caller holds q->vb_lock */
+static int
+dt3155_buf_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb,
+ enum v4l2_field field)
+{
+ int ret = 0;
+
+ vb->width = img_width;
+ vb->height = img_height;
+ vb->size = img_width * img_height;
+ vb->field = field;
+ if (vb->state == VIDEOBUF_NEEDS_INIT)
+ ret = videobuf_iolock(q, vb, NULL);
+ if (ret) {
+ vb->state = VIDEOBUF_ERROR;
+ printk(KERN_ERR "ERROR: videobuf_iolock() failed\n");
+ videobuf_dma_contig_free(q, vb);
+ } else
+ vb->state = VIDEOBUF_PREPARED;
+ return ret;
+}
+
+/* Locking: Caller holds q->vb_lock & q->irqlock */
+static void
+dt3155_buf_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
+{
+ struct dt3155_priv *pd = q->priv_data;
+
+ if (vb->state != VIDEOBUF_NEEDS_INIT) {
+ vb->state = VIDEOBUF_QUEUED;
+ dt3155_sync_for_device(q, vb);
+ list_add_tail(&vb->queue, &pd->dmaq);
+ wake_up_interruptible_sync(&pd->do_dma);
+ } else
+ vb->state = VIDEOBUF_ERROR;
+}
+
+/* Locking: Caller holds q->vb_lock */
+static void
+dt3155_buf_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
+{
+ if (vb->state == VIDEOBUF_ACTIVE)
+ videobuf_waiton(vb, 0, 0); /* FIXME: cannot be interrupted */
+ dt3155_dma_contig_free(q, vb);
+ vb->state = VIDEOBUF_NEEDS_INIT;
+}
+
+static struct videobuf_queue_ops vbq_ops = {
+ .buf_setup = dt3155_buf_setup,
+ .buf_prepare = dt3155_buf_prepare,
+ .buf_queue = dt3155_buf_queue,
+ .buf_release = dt3155_buf_release,
+};
+
+static irqreturn_t
+dt3155_irq_handler_even(int irq, void *dev_id)
+{
+ struct dt3155_priv *ipd = dev_id;
+ struct videobuf_buffer *ivb;
+ dma_addr_t dma_addr;
+ u32 tmp;
+
+ tmp = ioread32(ipd->regs + INT_CSR) & (FLD_START | FLD_END_ODD);
+ if (!tmp)
+ return IRQ_NONE; /* not our irq */
+ if ((tmp & FLD_START) && !(tmp & FLD_END_ODD)) {
+ iowrite32(FLD_START_EN | FLD_END_ODD_EN | FLD_START,
+ ipd->regs + INT_CSR);
+ ipd->field_count++;
+ return IRQ_HANDLED; /* start of field irq */
+ }
+ if ((tmp & FLD_START) && (tmp & FLD_END_ODD)) {
+ if (!ipd->stats.start_before_end++)
+ printk(KERN_ERR "dt3155: irq: START before END\n");
+ }
+ /* check for corrupted fields */
+/* write_i2c_reg(ipd->regs, EVEN_CSR, CSR_ERROR | CSR_DONE); */
+/* write_i2c_reg(ipd->regs, ODD_CSR, CSR_ERROR | CSR_DONE); */
+ tmp = ioread32(ipd->regs + CSR1) & (FLD_CRPT_EVEN | FLD_CRPT_ODD);
+ if (tmp) {
+ if (!ipd->stats.corrupted_fields++)
+ printk(KERN_ERR "dt3155: corrupted field %u\n", tmp);
+ iowrite32(FIFO_EN | SRST | FLD_CRPT_ODD | FLD_CRPT_EVEN |
+ FLD_DN_ODD | FLD_DN_EVEN |
+ CAP_CONT_EVEN | CAP_CONT_ODD,
+ ipd->regs + CSR1);
+ mmiowb();
+ }
+
+ spin_lock(&ipd->lock);
+ if (ipd->curr_buf && ipd->curr_buf->state == VIDEOBUF_ACTIVE) {
+ if (waitqueue_active(&ipd->curr_buf->done)) {
+ do_gettimeofday(&ipd->curr_buf->ts);
+ ipd->curr_buf->field_count = ipd->field_count;
+ ipd->curr_buf->state = VIDEOBUF_DONE;
+ wake_up(&ipd->curr_buf->done);
+ } else {
+ ivb = ipd->curr_buf;
+ goto load_dma;
+ }
+ } else
+ goto stop_dma;
+ if (list_empty(&ipd->dmaq))
+ goto stop_dma;
+ ivb = list_first_entry(&ipd->dmaq, typeof(*ivb), queue);
+ list_del(&ivb->queue);
+ if (ivb->state == VIDEOBUF_QUEUED) {
+ ivb->state = VIDEOBUF_ACTIVE;
+ ipd->curr_buf = ivb;
+ } else
+ goto stop_dma;
+load_dma:
+ dma_addr = videobuf_to_dma_contig(ivb);
+ iowrite32(dma_addr, ipd->regs + EVEN_DMA_START);
+ iowrite32(dma_addr + ivb->width, ipd->regs + ODD_DMA_START);
+ iowrite32(ivb->width, ipd->regs + EVEN_DMA_STRIDE);
+ iowrite32(ivb->width, ipd->regs + ODD_DMA_STRIDE);
+ mmiowb();
+ /* enable interrupts, clear all irq flags */
+ iowrite32(FLD_START_EN | FLD_END_ODD_EN | FLD_START |
+ FLD_END_EVEN | FLD_END_ODD, ipd->regs + INT_CSR);
+ spin_unlock(&ipd->lock);
+ return IRQ_HANDLED;
+
+stop_dma:
+ ipd->curr_buf = NULL;
+ /* stop the board */
+ write_i2c_reg_nowait(ipd->regs, CSR2, ipd->csr2);
+ /* disable interrupts, clear all irq flags */
+ iowrite32(FLD_START | FLD_END_EVEN | FLD_END_ODD, ipd->regs + INT_CSR);
+ spin_unlock(&ipd->lock);
+ return IRQ_HANDLED;
+}
+
+static int
+dt3155_threadfn(void *arg)
+{
+ struct dt3155_priv *pd = arg;
+ struct videobuf_buffer *vb;
+ unsigned long flags;
+
+ while (1) {
+ wait_event_interruptible(pd->do_dma,
+ kthread_should_stop() || !list_empty(&pd->dmaq));
+ if (kthread_should_stop())
+ break;
+
+ spin_lock_irqsave(&pd->lock, flags);
+ if (pd->curr_buf) /* dma is active */
+ goto done;
+ if (list_empty(&pd->dmaq)) /* no empty biffers */
+ goto done;
+ vb = list_first_entry(&pd->dmaq, typeof(*vb), queue);
+ list_del(&vb->queue);
+ if (vb->state == VIDEOBUF_QUEUED) {
+ vb->state = VIDEOBUF_ACTIVE;
+ pd->curr_buf = vb;
+ spin_unlock_irqrestore(&pd->lock, flags);
+ /* start dma */
+ dt3155_start_acq(pd);
+ continue;
+ } else
+ printk(KERN_DEBUG "%s(): This is a BUG\n", __func__);
+done:
+ spin_unlock_irqrestore(&pd->lock, flags);
+ }
+ return 0;
+}
+
+static int
+dt3155_open(struct file *filp)
+{
+ int ret = 0;
+ struct dt3155_priv *pd = video_drvdata(filp);
+
+ printk(KERN_INFO "dt3155: open(): minor: %i\n", pd->vdev->minor);
+
+ if (mutex_lock_interruptible(&pd->mux) == -EINTR)
+ return -ERESTARTSYS;
+ if (!pd->users) {
+ pd->vidq = kzalloc(sizeof(*pd->vidq), GFP_KERNEL);
+ if (!pd->vidq) {
+ printk(KERN_ERR "dt3155: error: alloc queue\n");
+ ret = -ENOMEM;
+ goto err_alloc_queue;
+ }
+ dt3155_queue_dma_contig_init(pd->vidq, &vbq_ops,
+ &pd->pdev->dev, &pd->lock,
+ V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_FIELD_NONE,
+ sizeof(struct videobuf_buffer), pd);
+ /* disable all irqs, clear all irq flags */
+ iowrite32(FLD_START | FLD_END_EVEN | FLD_END_ODD,
+ pd->regs + INT_CSR);
+ pd->irq_handler = dt3155_irq_handler_even;
+ ret = request_irq(pd->pdev->irq, pd->irq_handler,
+ IRQF_SHARED, DT3155_NAME, pd);
+ if (ret) {
+ printk(KERN_ERR "dt3155: error: request_irq\n");
+ goto err_request_irq;
+ }
+ pd->curr_buf = NULL;
+ pd->thread = kthread_run(dt3155_threadfn, pd,
+ "dt3155_thread_%i", pd->vdev->minor);
+ if (IS_ERR(pd->thread)) {
+ printk(KERN_ERR "dt3155: kthread_run() failed\n");
+ ret = PTR_ERR(pd->thread);
+ goto err_thread;
+ }
+ pd->field_count = 0;
+ }
+ pd->users++;
+ goto done;
+err_thread:
+ free_irq(pd->pdev->irq, pd);
+err_request_irq:
+ kfree(pd->vidq);
+ pd->vidq = NULL;
+err_alloc_queue:
+done:
+ mutex_unlock(&pd->mux);
+ return ret;
+}
+
+static int
+dt3155_release(struct file *filp)
+{
+ struct dt3155_priv *pd = video_drvdata(filp);
+ struct videobuf_buffer *tmp;
+ unsigned long flags;
+ int ret = 0;
+
+ printk(KERN_INFO "dt3155: release(): minor: %i\n", pd->vdev->minor);
+
+ if (mutex_lock_interruptible(&pd->mux) == -EINTR)
+ return -ERESTARTSYS;
+ pd->users--;
+ BUG_ON(pd->users < 0);
+ if (pd->acq_fp == filp) {
+ spin_lock_irqsave(&pd->lock, flags);
+ INIT_LIST_HEAD(&pd->dmaq); /* queue is emptied */
+ tmp = pd->curr_buf;
+ spin_unlock_irqrestore(&pd->lock, flags);
+ if (tmp)
+ videobuf_waiton(tmp, 0, 1); /* block, interruptible */
+ dt3155_stop_acq(pd);
+ videobuf_stop(pd->vidq);
+ pd->acq_fp = NULL;
+ }
+ if (!pd->users) {
+ kthread_stop(pd->thread);
+ free_irq(pd->pdev->irq, pd);
+ kfree(pd->vidq);
+ pd->vidq = NULL;
+ }
+ mutex_unlock(&pd->mux);
+ return ret;
+}
+
+static ssize_t
+dt3155_read(struct file *filp, char __user *user, size_t size, loff_t *loff)
+{
+ struct dt3155_priv *pd = video_drvdata(filp);
+ int ret;
+
+ if (mutex_lock_interruptible(&pd->mux) == -EINTR)
+ return -ERESTARTSYS;
+ if (!pd->acq_fp)
+ pd->acq_fp = filp;
+ else if (pd->acq_fp != filp) {
+ ret = -EBUSY;
+ goto done;
+ }
+ ret = videobuf_read_stream(pd->vidq, user, size, loff, 0,
+ filp->f_flags & O_NONBLOCK);
+done:
+ mutex_unlock(&pd->mux);
+ return ret;
+}
+
+static unsigned int
+dt3155_poll(struct file *filp, struct poll_table_struct *polltbl)
+{
+ struct dt3155_priv *pd = video_drvdata(filp);
+
+ return videobuf_poll_stream(filp, pd->vidq, polltbl);
+}
+
+static int
+dt3155_mmap(struct file *filp, struct vm_area_struct *vma)
+{
+ struct dt3155_priv *pd = video_drvdata(filp);
+
+ return videobuf_mmap_mapper(pd->vidq, vma);
+}
+
+static const struct v4l2_file_operations dt3155_fops = {
+ .owner = THIS_MODULE,
+ .open = dt3155_open,
+ .release = dt3155_release,
+ .read = dt3155_read,
+ .poll = dt3155_poll,
+ .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */
+ .mmap = dt3155_mmap,
+};
+
+static int
+dt3155_ioc_streamon(struct file *filp, void *p, enum v4l2_buf_type type)
+{
+ struct dt3155_priv *pd = video_drvdata(filp);
+ int ret = -ERESTARTSYS;
+
+ if (mutex_lock_interruptible(&pd->mux) == -EINTR)
+ return ret;
+ if (!pd->acq_fp) {
+ ret = videobuf_streamon(pd->vidq);
+ if (ret)
+ goto unlock;
+ pd->acq_fp = filp;
+ wake_up_interruptible_sync(&pd->do_dma);
+ } else if (pd->acq_fp == filp) {
+ ret = videobuf_streamon(pd->vidq);
+ if (!ret)
+ wake_up_interruptible_sync(&pd->do_dma);
+ } else
+ ret = -EBUSY;
+unlock:
+ mutex_unlock(&pd->mux);
+ return ret;
+}
+
+static int
+dt3155_ioc_streamoff(struct file *filp, void *p, enum v4l2_buf_type type)
+{
+ struct dt3155_priv *pd = video_drvdata(filp);
+ struct videobuf_buffer *tmp;
+ unsigned long flags;
+ int ret;
+
+ ret = videobuf_streamoff(pd->vidq);
+ if (ret)
+ return ret;
+ spin_lock_irqsave(&pd->lock, flags);
+ tmp = pd->curr_buf;
+ spin_unlock_irqrestore(&pd->lock, flags);
+ if (tmp)
+ videobuf_waiton(tmp, 0, 1); /* block, interruptible */
+ return ret;
+}
+
+static int
+dt3155_ioc_querycap(struct file *filp, void *p, struct v4l2_capability *cap)
+{
+ struct dt3155_priv *pd = video_drvdata(filp);
+
+ strcpy(cap->driver, DT3155_NAME);
+ strcpy(cap->card, DT3155_NAME " frame grabber");
+ sprintf(cap->bus_info, "PCI:%s", pci_name(pd->pdev));
+ cap->version =
+ KERNEL_VERSION(DT3155_VER_MAJ, DT3155_VER_MIN, DT3155_VER_EXT);
+ cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
+#ifdef CONFIG_DT3155_STREAMING
+ V4L2_CAP_STREAMING;
+#else
+ V4L2_CAP_READWRITE;
+#endif
+ return 0;
+}
+
+static int
+dt3155_ioc_enum_fmt_vid_cap(struct file *filp, void *p, struct v4l2_fmtdesc *f)
+{
+ if (f->index >= NUM_OF_FORMATS)
+ return -EINVAL;
+ *f = frame_std[f->index];
+ return 0;
+}
+
+static int
+dt3155_ioc_g_fmt_vid_cap(struct file *filp, void *p, struct v4l2_format *f)
+{
+ if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+ f->fmt.pix.width = img_width;
+ f->fmt.pix.height = img_height;
+ f->fmt.pix.pixelformat = V4L2_PIX_FMT_GREY;
+ f->fmt.pix.field = V4L2_FIELD_NONE;
+ f->fmt.pix.bytesperline = f->fmt.pix.width;
+ f->fmt.pix.sizeimage = f->fmt.pix.width * f->fmt.pix.height;
+ f->fmt.pix.colorspace = 0;
+ f->fmt.pix.priv = 0;
+ return 0;
+}
+
+static int
+dt3155_ioc_try_fmt_vid_cap(struct file *filp, void *p, struct v4l2_format *f)
+{
+ if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+ if (f->fmt.pix.width == img_width &&
+ f->fmt.pix.height == img_height &&
+ f->fmt.pix.pixelformat == V4L2_PIX_FMT_GREY &&
+ f->fmt.pix.field == V4L2_FIELD_NONE &&
+ f->fmt.pix.bytesperline == f->fmt.pix.width &&
+ f->fmt.pix.sizeimage == f->fmt.pix.width * f->fmt.pix.height)
+ return 0;
+ else
+ return -EINVAL;
+}
+
+static int
+dt3155_ioc_s_fmt_vid_cap(struct file *filp, void *p, struct v4l2_format *f)
+{
+ return dt3155_ioc_g_fmt_vid_cap(filp, p, f);
+}
+
+static int
+dt3155_ioc_reqbufs(struct file *filp, void *p, struct v4l2_requestbuffers *b)
+{
+ struct dt3155_priv *pd = video_drvdata(filp);
+ struct videobuf_queue *q = pd->vidq;
+
+ if (b->memory != V4L2_MEMORY_MMAP)
+ return -EINVAL;
+ if (b->count)
+ return videobuf_reqbufs(q, b);
+ else { /* FIXME: is it necessary? */
+ printk(KERN_DEBUG "dt3155: request to free buffers\n");
+ return videobuf_mmap_free(q);
+ }
+}
+
+static int
+dt3155_ioc_querybuf(struct file *filp, void *p, struct v4l2_buffer *b)
+{
+ struct dt3155_priv *pd = video_drvdata(filp);
+ struct videobuf_queue *q = pd->vidq;
+
+ return videobuf_querybuf(q, b);
+}
+
+static int
+dt3155_ioc_qbuf(struct file *filp, void *p, struct v4l2_buffer *b)
+{
+ struct dt3155_priv *pd = video_drvdata(filp);
+ struct videobuf_queue *q = pd->vidq;
+
+ return videobuf_qbuf(q, b);
+}
+
+static int
+dt3155_ioc_dqbuf(struct file *filp, void *p, struct v4l2_buffer *b)
+{
+ struct dt3155_priv *pd = video_drvdata(filp);
+ struct videobuf_queue *q = pd->vidq;
+
+ return videobuf_dqbuf(q, b, filp->f_flags & O_NONBLOCK);
+}
+
+static int
+dt3155_ioc_querystd(struct file *filp, void *p, v4l2_std_id *norm)
+{
+ *norm = DT3155_CURRENT_NORM;
+ return 0;
+}
+
+static int
+dt3155_ioc_g_std(struct file *filp, void *p, v4l2_std_id *norm)
+{
+ *norm = DT3155_CURRENT_NORM;
+ return 0;
+}
+
+static int
+dt3155_ioc_s_std(struct file *filp, void *p, v4l2_std_id *norm)
+{
+ if (*norm & DT3155_CURRENT_NORM)
+ return 0;
+ return -EINVAL;
+}
+
+static int
+dt3155_ioc_enum_input(struct file *filp, void *p, struct v4l2_input *input)
+{
+ if (input->index)
+ return -EINVAL;
+ strcpy(input->name, "Coax in");
+ input->type = V4L2_INPUT_TYPE_CAMERA;
+ input->std = V4L2_STD_ALL;
+ input->status = 0;/* FIXME: add sync detection & V4L2_IN_ST_NO_H_LOCK */
+ return 0;
+}
+
+static int
+dt3155_ioc_g_input(struct file *filp, void *p, unsigned int *i)
+{
+ *i = 0;
+ return 0;
+}
+
+static int
+dt3155_ioc_s_input(struct file *filp, void *p, unsigned int i)
+{
+ if (i)
+ return -EINVAL;
+ return 0;
+}
+
+static int
+dt3155_ioc_g_parm(struct file *filp, void *p, struct v4l2_streamparm *parms)
+{
+ if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+ parms->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
+ parms->parm.capture.capturemode = 0;
+ parms->parm.capture.timeperframe.numerator = 1001;
+ parms->parm.capture.timeperframe.denominator = frames_per_sec * 1000;
+ parms->parm.capture.extendedmode = 0;
+ parms->parm.capture.readbuffers = 1;
+ return 0;
+}
+
+static int
+dt3155_ioc_s_parm(struct file *filp, void *p, struct v4l2_streamparm *parms)
+{
+ if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+ return -EINVAL;
+ parms->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
+ parms->parm.capture.capturemode = 0;
+ parms->parm.capture.timeperframe.numerator = 1001;
+ parms->parm.capture.timeperframe.denominator = frames_per_sec * 1000;
+ parms->parm.capture.extendedmode = 0;
+ parms->parm.capture.readbuffers = 1;
+ return 0;
+}
+
+static const struct v4l2_ioctl_ops dt3155_ioctl_ops = {
+ .vidioc_streamon = dt3155_ioc_streamon,
+ .vidioc_streamoff = dt3155_ioc_streamoff,
+ .vidioc_querycap = dt3155_ioc_querycap,
+/*
+ .vidioc_g_priority = dt3155_ioc_g_priority,
+ .vidioc_s_priority = dt3155_ioc_s_priority,
+*/
+ .vidioc_enum_fmt_vid_cap = dt3155_ioc_enum_fmt_vid_cap,
+ .vidioc_try_fmt_vid_cap = dt3155_ioc_try_fmt_vid_cap,
+ .vidioc_g_fmt_vid_cap = dt3155_ioc_g_fmt_vid_cap,
+ .vidioc_s_fmt_vid_cap = dt3155_ioc_s_fmt_vid_cap,
+ .vidioc_reqbufs = dt3155_ioc_reqbufs,
+ .vidioc_querybuf = dt3155_ioc_querybuf,
+ .vidioc_qbuf = dt3155_ioc_qbuf,
+ .vidioc_dqbuf = dt3155_ioc_dqbuf,
+ .vidioc_querystd = dt3155_ioc_querystd,
+ .vidioc_g_std = dt3155_ioc_g_std,
+ .vidioc_s_std = dt3155_ioc_s_std,
+ .vidioc_enum_input = dt3155_ioc_enum_input,
+ .vidioc_g_input = dt3155_ioc_g_input,
+ .vidioc_s_input = dt3155_ioc_s_input,
+/*
+ .vidioc_queryctrl = dt3155_ioc_queryctrl,
+ .vidioc_g_ctrl = dt3155_ioc_g_ctrl,
+ .vidioc_s_ctrl = dt3155_ioc_s_ctrl,
+ .vidioc_querymenu = dt3155_ioc_querymenu,
+ .vidioc_g_ext_ctrls = dt3155_ioc_g_ext_ctrls,
+ .vidioc_s_ext_ctrls = dt3155_ioc_s_ext_ctrls,
+*/
+ .vidioc_g_parm = dt3155_ioc_g_parm,
+ .vidioc_s_parm = dt3155_ioc_s_parm,
+/*
+ .vidioc_cropcap = dt3155_ioc_cropcap,
+ .vidioc_g_crop = dt3155_ioc_g_crop,
+ .vidioc_s_crop = dt3155_ioc_s_crop,
+ .vidioc_enum_framesizes = dt3155_ioc_enum_framesizes,
+ .vidioc_enum_frameintervals = dt3155_ioc_enum_frameintervals,
+#ifdef CONFIG_VIDEO_V4L1_COMPAT
+ .vidiocgmbuf = iocgmbuf,
+#endif
+*/
+};
+
+static int __devinit
+dt3155_init_board(struct pci_dev *dev)
+{
+ int i;
+ u8 tmp;
+ struct dt3155_buf *buf;
+ struct dt3155_priv *pd = pci_get_drvdata(dev);
+ pci_set_master(dev); /* dt3155 needs it */
+
+ /* resetting the adapter */
+ iowrite32(FLD_CRPT_ODD | FLD_CRPT_EVEN | FLD_DN_ODD | FLD_DN_EVEN,
+ pd->regs + CSR1);
+ mmiowb();
+ msleep(10);
+
+ /* initializing adaper registers */
+ iowrite32(FIFO_EN | SRST, pd->regs + CSR1);
+ mmiowb();
+ iowrite32(0xEEEEEE01, pd->regs + EVEN_PIXEL_FMT);
+ iowrite32(0xEEEEEE01, pd->regs + ODD_PIXEL_FMT);
+ iowrite32(0x00000020, pd->regs + FIFO_TRIGER);
+ iowrite32(0x00000103, pd->regs + XFER_MODE);
+ iowrite32(0, pd->regs + RETRY_WAIT_CNT);
+ iowrite32(0, pd->regs + INT_CSR);
+ iowrite32(1, pd->regs + EVEN_FLD_MASK);
+ iowrite32(1, pd->regs + ODD_FLD_MASK);
+ iowrite32(0, pd->regs + MASK_LENGTH);
+ iowrite32(0x0005007C, pd->regs + FIFO_FLAG_CNT);
+ iowrite32(0x01010101, pd->regs + IIC_CLK_DUR);
+ mmiowb();
+
+ /* verifying that we have a DT3155 board (not just a SAA7116 chip) */
+ read_i2c_reg(pd->regs, DT_ID, &tmp);
+ if (tmp != DT3155_ID)
+ return -ENODEV;
+
+ /* initialize AD LUT */
+ write_i2c_reg(pd->regs, AD_ADDR, 0);
+ for (i = 0; i < 256; i++)
+ write_i2c_reg(pd->regs, AD_LUT, i);
+
+ /* initialize ADC references */
+ /* FIXME: pos_ref & neg_ref depend on VT_50HZ */
+ write_i2c_reg(pd->regs, AD_ADDR, AD_CMD_REG);
+ write_i2c_reg(pd->regs, AD_CMD, VIDEO_CNL_1 | SYNC_CNL_1 | SYNC_LVL_3);
+ write_i2c_reg(pd->regs, AD_ADDR, AD_POS_REF);
+ write_i2c_reg(pd->regs, AD_CMD, 34);
+ write_i2c_reg(pd->regs, AD_ADDR, AD_NEG_REF);
+ write_i2c_reg(pd->regs, AD_CMD, 0);
+
+ /* initialize PM LUT */
+ write_i2c_reg(pd->regs, CONFIG, pd->config | PM_LUT_PGM);
+ for (i = 0; i < 256; i++) {
+ write_i2c_reg(pd->regs, PM_LUT_ADDR, i);
+ write_i2c_reg(pd->regs, PM_LUT_DATA, i);
+ }
+ write_i2c_reg(pd->regs, CONFIG, pd->config | PM_LUT_PGM | PM_LUT_SEL);
+ for (i = 0; i < 256; i++) {
+ write_i2c_reg(pd->regs, PM_LUT_ADDR, i);
+ write_i2c_reg(pd->regs, PM_LUT_DATA, i);
+ }
+ write_i2c_reg(pd->regs, CONFIG, pd->config); /* ACQ_MODE_EVEN */
+
+ /* select chanel 1 for input and set sync level */
+ write_i2c_reg(pd->regs, AD_ADDR, AD_CMD_REG);
+ write_i2c_reg(pd->regs, AD_CMD, VIDEO_CNL_1 | SYNC_CNL_1 | SYNC_LVL_3);
+
+ /* allocate and pci_map memory, and initialize the DMA machine */
+ buf = dt3155_get_buf(dt3155_free_bufs);
+ if (!buf) {
+ printk(KERN_ERR "dt3155: dt3155_get_buf "
+ "(in dt3155_init_board) failed\n");
+ return -ENOMEM;
+ }
+ buf->dma = pci_map_single(dev, buf->cpu,
+ DT3155_BUF_SIZE, PCI_DMA_FROMDEVICE);
+ if (pci_dma_mapping_error(dev, buf->dma)) {
+ printk(KERN_ERR "dt3155: pci_map_single failed\n");
+ dt3155_put_buf(buf, dt3155_free_bufs);
+ return -ENOMEM;
+ }
+ iowrite32(buf->dma, pd->regs + EVEN_DMA_START);
+ iowrite32(buf->dma, pd->regs + ODD_DMA_START);
+ iowrite32(0, pd->regs + EVEN_DMA_STRIDE);
+ iowrite32(0, pd->regs + ODD_DMA_STRIDE);
+
+ /* Perform a pseudo even field acquire */
+ iowrite32(FIFO_EN | SRST | CAP_CONT_ODD, pd->regs + CSR1);
+ write_i2c_reg(pd->regs, CSR2, pd->csr2 | SYNC_SNTL);
+ write_i2c_reg(pd->regs, CONFIG, pd->config);
+ write_i2c_reg(pd->regs, EVEN_CSR, CSR_SNGL);
+ write_i2c_reg(pd->regs, CSR2, pd->csr2 | BUSY_EVEN | SYNC_SNTL);
+ msleep(100);
+ read_i2c_reg(pd->regs, CSR2, &tmp);
+ write_i2c_reg(pd->regs, EVEN_CSR, CSR_ERROR | CSR_SNGL | CSR_DONE);
+ write_i2c_reg(pd->regs, ODD_CSR, CSR_ERROR | CSR_SNGL | CSR_DONE);
+ write_i2c_reg(pd->regs, CSR2, pd->csr2);
+ iowrite32(FIFO_EN | SRST | FLD_DN_EVEN | FLD_DN_ODD, pd->regs + CSR1);
+
+ /* pci_unmap and deallocate memory */
+ pci_unmap_single(dev, buf->dma, DT3155_BUF_SIZE, PCI_DMA_FROMDEVICE);
+ dt3155_put_buf(buf, dt3155_free_bufs);
+ if (tmp & BUSY_EVEN) {
+ printk(KERN_ERR "dt3155: BUSY_EVEN not cleared\n");
+ return -EIO;
+ }
+ return 0;
+}
+
+static struct video_device dt3155_vdev = {
+ .name = DT3155_NAME,
+ .fops = &dt3155_fops,
+ .ioctl_ops = &dt3155_ioctl_ops,
+ .minor = -1,
+ .release = video_device_release,
+ .tvnorms = V4L2_STD_ALL,
+ .current_norm = DT3155_CURRENT_NORM,
+};
+
+static int __devinit
+dt3155_probe(struct pci_dev *dev, const struct pci_device_id *id)
+{
+ int err = -ENODEV;
+ struct dt3155_priv *pd;
+
+ printk(KERN_INFO "dt3155: probe()\n");
+ if (pci_set_dma_mask(dev, DMA_BIT_MASK(32))) {
+ printk(KERN_ERR "dt3155: cannot set dma_mask\n");
+ return -ENODEV;
+ }
+ pd = kzalloc(sizeof(*pd), GFP_KERNEL);
+ if (!pd) {
+ printk(KERN_ERR "dt3155: cannot allocate dt3155_priv\n");
+ return -ENOMEM;
+ }
+ pd->vdev = video_device_alloc();
+ if (!pd->vdev) {
+ printk(KERN_ERR "dt3155: cannot allocate vdp structure\n");
+ goto err_video_device_alloc;
+ }
+ *pd->vdev = dt3155_vdev;
+ pci_set_drvdata(dev, pd); /* for use in dt3155_remove() */
+ video_set_drvdata(pd->vdev, pd); /* for use in video_fops */
+ pd->users = 0;
+ pd->acq_fp = NULL;
+ pd->pdev = dev;
+ INIT_LIST_HEAD(&pd->dmaq);
+ init_waitqueue_head(&pd->do_dma);
+ mutex_init(&pd->mux);
+ pd->csr2 = csr2_init;
+ pd->config = config_init;
+ err = pci_enable_device(pd->pdev);
+ if (err) {
+ printk(KERN_ERR "dt3155: pci_dev not enabled\n");
+ goto err_enable_dev;
+ }
+ err = pci_request_region(pd->pdev, 0, pci_name(pd->pdev));
+ if (err)
+ goto err_req_region;
+ pd->regs = pci_iomap(pd->pdev, 0, pci_resource_len(pd->pdev, 0));
+ if (!pd->regs) {
+ err = -ENOMEM;
+ printk(KERN_ERR "dt3155: pci_iomap failed\n");
+ goto err_pci_iomap;
+ }
+ err = dt3155_init_board(pd->pdev);
+ if (err) {
+ printk(KERN_ERR "dt3155: dt3155_init_board failed\n");
+ goto err_init_board;
+ }
+ err = video_register_device(pd->vdev, VFL_TYPE_GRABBER, -1);
+ if (err) {
+ printk(KERN_ERR "dt3155: Cannot register video device\n");
+ goto err_init_board;
+ }
+ printk(KERN_INFO "dt3155: /dev/video%i is ready\n", pd->vdev->minor);
+ return 0; /* success */
+
+err_init_board:
+ pci_iounmap(pd->pdev, pd->regs);
+err_pci_iomap:
+ pci_release_region(pd->pdev, 0);
+err_req_region:
+ pci_disable_device(pd->pdev);
+err_enable_dev:
+ video_device_release(pd->vdev);
+err_video_device_alloc:
+ kfree(pd);
+ return err;
+}
+
+static void __devexit
+dt3155_remove(struct pci_dev *dev)
+{
+ struct dt3155_priv *pd = pci_get_drvdata(dev);
+
+ printk(KERN_INFO "dt3155: remove()\n");
+ video_unregister_device(pd->vdev);
+ pci_iounmap(dev, pd->regs);
+ pci_release_region(pd->pdev, 0);
+ pci_disable_device(pd->pdev);
+ /*
+ * video_device_release() is invoked automatically
+ * see: struct video_device dt3155_vdev
+ */
+ kfree(pd);
+}
+
+static DEFINE_PCI_DEVICE_TABLE(pci_ids) = {
+ { PCI_DEVICE(DT3155_VENDOR_ID, DT3155_DEVICE_ID) },
+ { 0, /* zero marks the end */ },
+};
+MODULE_DEVICE_TABLE(pci, pci_ids);
+
+static struct pci_driver pci_driver = {
+ .name = DT3155_NAME,
+ .id_table = pci_ids,
+ .probe = dt3155_probe,
+ .remove = __devexit_p(dt3155_remove),
+};
+
+static int __init
+dt3155_init_module(void)
+{
+ int err;
+
+ printk(KERN_INFO "dt3155: ==================\n");
+ printk(KERN_INFO "dt3155: init()\n");
+ dt3155_chunks = dt3155_init_chunks_fifo();
+ if (!dt3155_chunks) {
+ err = -ENOMEM;
+ printk(KERN_ERR "dt3155: cannot init dt3155_chunks_fifo\n");
+ goto err_init_chunks_fifo;
+ }
+ dt3155_free_bufs = dt3155_init_ibufs_fifo(dt3155_chunks,
+ DT3155_BUF_SIZE);
+ if (!dt3155_free_bufs) {
+ err = -ENOMEM;
+ printk(KERN_ERR "dt3155: cannot dt3155_init_ibufs_fifo\n");
+ goto err_init_ibufs_fifo;
+ }
+ dt3155_alloc_bufs = dt3155_init_fifo();
+ if (!dt3155_alloc_bufs) {
+ err = -ENOMEM;
+ printk(KERN_ERR "dt3155: cannot dt3155_init_fifo\n");
+ goto err_init_fifo;
+ }
+ err = pci_register_driver(&pci_driver);
+ if (err) {
+ printk(KERN_ERR "dt3155: cannot register pci_driver\n");
+ goto err_register_driver;
+ }
+ return 0; /* succes */
+err_register_driver:
+ dt3155_free_fifo(dt3155_alloc_bufs);
+err_init_fifo:
+ dt3155_free_ibufs_fifo(dt3155_free_bufs);
+err_init_ibufs_fifo:
+ dt3155_free_chunks_fifo(dt3155_chunks);
+err_init_chunks_fifo:
+ return err;
+}
+
+static void __exit
+dt3155_exit_module(void)
+{
+ pci_unregister_driver(&pci_driver);
+ dt3155_free_fifo(dt3155_alloc_bufs);
+ dt3155_free_ibufs_fifo(dt3155_free_bufs);
+ dt3155_free_chunks_fifo(dt3155_chunks);
+ printk(KERN_INFO "dt3155: exit()\n");
+ printk(KERN_INFO "dt3155: ==================\n");
+}
+
+module_init(dt3155_init_module);
+module_exit(dt3155_exit_module);
+
+MODULE_DESCRIPTION("video4linux pci-driver for dt3155 frame grabber");
+MODULE_AUTHOR("Marin Mitov <mitov@issp.bas.bg>");
+MODULE_VERSION(DT3155_VERSION);
+MODULE_LICENSE("GPL");
projects / ~andy / linux / commitdiff