diff options
Diffstat (limited to 'drivers/staging/dt3155v4l/dt3155v4l.c')
-rw-r--r-- | drivers/staging/dt3155v4l/dt3155v4l.c | 1536 |
1 files changed, 1536 insertions, 0 deletions
diff --git a/drivers/staging/dt3155v4l/dt3155v4l.c b/drivers/staging/dt3155v4l/dt3155v4l.c new file mode 100644 index 000000000000..881c3e99bd47 --- /dev/null +++ b/drivers/staging/dt3155v4l/dt3155v4l.c @@ -0,0 +1,1536 @@ +#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 <linux/delay.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 __iomem *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 __iomem *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. + */ +static void write_i2c_reg_nowait(void __iomem *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 __iomem *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"); |