1538 lines
40 KiB
C
1538 lines
40 KiB
C
#include <media/v4l2-dev.h>
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#include <media/videobuf-core.h>
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#include <media/v4l2-ioctl.h>
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#include <linux/pci.h>
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#include <linux/version.h>
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#include <linux/stringify.h>
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#include <media/videobuf-dma-contig.h>
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#include <linux/kthread.h>
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#include "dt3155v4l.h"
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#include "dt3155-bufs.h"
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#define DT3155_VENDOR_ID 0x8086
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#define DT3155_DEVICE_ID 0x1223
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/* global initializers (for all boards) */
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#ifdef CONFIG_DT3155_CCIR
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static const u8 csr2_init = VT_50HZ;
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#define DT3155_CURRENT_NORM V4L2_STD_625_50
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static const unsigned int img_width = 768;
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static const unsigned int img_height = 576;
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static const unsigned int frames_per_sec = 25;
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static const struct v4l2_fmtdesc frame_std[] = {
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{
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.index = 0,
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.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
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.flags = 0,
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.description = "CCIR/50Hz 8 bits gray",
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.pixelformat = V4L2_PIX_FMT_GREY,
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},
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};
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#else
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static const u8 csr2_init = VT_60HZ;
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#define DT3155_CURRENT_NORM V4L2_STD_525_60
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static const unsigned int img_width = 640;
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static const unsigned int img_height = 480;
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static const unsigned int frames_per_sec = 30;
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static const struct v4l2_fmtdesc frame_std[] = {
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{
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.index = 0,
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.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
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.flags = 0,
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.description = "RS-170/60Hz 8 bits gray",
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.pixelformat = V4L2_PIX_FMT_GREY,
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},
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};
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#endif
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#define NUM_OF_FORMATS ARRAY_SIZE(frame_std)
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static u8 config_init = ACQ_MODE_EVEN;
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/**
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* read_i2c_reg - reads an internal i2c register
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*
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* @addr: dt3155 mmio base address
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* @index: index (internal address) of register to read
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* @data: pointer to byte the read data will be placed in
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*
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* returns: zero on success or error code
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*
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* This function starts reading the specified (by index) register
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* and busy waits for the process to finish. The result is placed
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* in a byte pointed by data.
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*/
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static int
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read_i2c_reg(void *addr, u8 index, u8 *data)
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{
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u32 tmp = index;
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iowrite32((tmp<<17) | IIC_READ, addr + IIC_CSR2);
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mmiowb();
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udelay(45); /* wait at least 43 usec for NEW_CYCLE to clear */
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if (ioread32(addr + IIC_CSR2) & NEW_CYCLE) {
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/* error: NEW_CYCLE not cleared */
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printk(KERN_ERR "dt3155: NEW_CYCLE not cleared\n");
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return -EIO;
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}
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tmp = ioread32(addr + IIC_CSR1);
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if (tmp & DIRECT_ABORT) {
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/* error: DIRECT_ABORT set */
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printk(KERN_ERR "dt3155: DIRECT_ABORT set\n");
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/* reset DIRECT_ABORT bit */
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iowrite32(DIRECT_ABORT, addr + IIC_CSR1);
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return -EIO;
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}
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*data = tmp>>24;
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return 0;
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}
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/**
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* write_i2c_reg - writes to an internal i2c register
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*
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* @addr: dt3155 mmio base address
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* @index: index (internal address) of register to read
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* @data: data to be written
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*
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* returns: zero on success or error code
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*
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* This function starts writting the specified (by index) register
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* and busy waits for the process to finish.
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*/
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static int
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write_i2c_reg(void *addr, u8 index, u8 data)
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{
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u32 tmp = index;
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iowrite32((tmp<<17) | IIC_WRITE | data, addr + IIC_CSR2);
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mmiowb();
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udelay(65); /* wait at least 63 usec for NEW_CYCLE to clear */
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if (ioread32(addr + IIC_CSR2) & NEW_CYCLE) {
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/* error: NEW_CYCLE not cleared */
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printk(KERN_ERR "dt3155: NEW_CYCLE not cleared\n");
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return -EIO;
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}
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if (ioread32(addr + IIC_CSR1) & DIRECT_ABORT) {
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/* error: DIRECT_ABORT set */
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printk(KERN_ERR "dt3155: DIRECT_ABORT set\n");
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/* reset DIRECT_ABORT bit */
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iowrite32(DIRECT_ABORT, addr + IIC_CSR1);
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return -EIO;
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}
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return 0;
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}
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/**
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* write_i2c_reg_nowait - writes to an internal i2c register
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*
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* @addr: dt3155 mmio base address
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* @index: index (internal address) of register to read
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* @data: data to be written
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*
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* This function starts writting the specified (by index) register
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* and then returns.
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*/
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void
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write_i2c_reg_nowait(void *addr, u8 index, u8 data)
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{
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u32 tmp = index;
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iowrite32((tmp<<17) | IIC_WRITE | data, addr + IIC_CSR2);
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mmiowb();
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}
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/**
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* wait_i2c_reg - waits the read/write to finish
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*
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* @addr: dt3155 mmio base address
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*
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* returns: zero on success or error code
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*
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* This function waits reading/writting to finish.
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*/
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static int
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wait_i2c_reg(void *addr)
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{
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if (ioread32(addr + IIC_CSR2) & NEW_CYCLE)
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udelay(65); /* wait at least 63 usec for NEW_CYCLE to clear */
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if (ioread32(addr + IIC_CSR2) & NEW_CYCLE) {
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/* error: NEW_CYCLE not cleared */
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printk(KERN_ERR "dt3155: NEW_CYCLE not cleared\n");
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return -EIO;
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}
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if (ioread32(addr + IIC_CSR1) & DIRECT_ABORT) {
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/* error: DIRECT_ABORT set */
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printk(KERN_ERR "dt3155: DIRECT_ABORT set\n");
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/* reset DIRECT_ABORT bit */
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iowrite32(DIRECT_ABORT, addr + IIC_CSR1);
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return -EIO;
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}
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return 0;
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}
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/*
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* global pointers to a list of 4MB chunks reserved at driver
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* load, broken down to contiguous buffers of 768 * 576 bytes
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* each to form a pool of buffers for allocations
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* FIXME: add spinlock to protect moves between alloc/free lists
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*/
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static struct dt3155_fifo *dt3155_chunks; /* list of 4MB chuncks */
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static struct dt3155_fifo *dt3155_free_bufs; /* list of free buffers */
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static struct dt3155_fifo *dt3155_alloc_bufs; /* list of allocated buffers */
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/* same as in <drivers/media/video/videobuf-dma-contig.c> */
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struct videobuf_dma_contig_memory {
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u32 magic;
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void *vaddr;
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dma_addr_t dma_handle;
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unsigned long size;
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int is_userptr;
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};
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#define MAGIC_DC_MEM 0x0733ac61
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#define MAGIC_CHECK(is, should) \
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if (unlikely((is) != (should))) { \
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pr_err("magic mismatch: %x expected %x\n", (is), (should)); \
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BUG(); \
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}
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/* helper functions to allocate/free buffers from the pool */
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static void *
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dt3155_alloc_buffer(struct device *dev, size_t size, dma_addr_t *dma_handle,
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gfp_t flag)
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{
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struct dt3155_buf *buf;
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if (size > DT3155_BUF_SIZE)
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return NULL;
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size = DT3155_BUF_SIZE; /* same for CCIR & RS-170 */
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buf = dt3155_get_buf(dt3155_free_bufs);
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if (!buf)
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return NULL;
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buf->dma = dma_map_single(dev, buf->cpu, size, DMA_FROM_DEVICE);
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if (dma_mapping_error(dev, buf->dma)) {
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dt3155_put_buf(buf, dt3155_free_bufs);
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return NULL;
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}
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dt3155_put_buf(buf, dt3155_alloc_bufs);
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*dma_handle = buf->dma;
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return buf->cpu;
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}
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static void
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dt3155_free_buffer(struct device *dev, size_t size, void *cpu_addr,
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dma_addr_t dma_handle)
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{
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struct dt3155_buf *buf, *last;
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int found = 0;
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if (!cpu_addr) /* to free NULL is OK */
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return;
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last = dt3155_get_buf(dt3155_alloc_bufs);
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if (!last) {
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printk(KERN_ERR "dt3155: %s(): no alloc buffers\n", __func__);
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return;
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}
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dt3155_put_buf(last, dt3155_alloc_bufs);
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do {
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buf = dt3155_get_buf(dt3155_alloc_bufs);
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if (buf->cpu == cpu_addr && buf->dma == dma_handle) {
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found = 1;
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break;
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}
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dt3155_put_buf(buf, dt3155_alloc_bufs);
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} while (buf != last);
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if (!found) {
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printk(KERN_ERR "dt3155: %s(): buffer not found\n", __func__);
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return;
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}
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size = DT3155_BUF_SIZE; /* same for CCIR & RS-170 */
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dma_unmap_single(dev, dma_handle, size, DMA_FROM_DEVICE);
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dt3155_put_buf(buf, dt3155_free_bufs);
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}
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/* same as videobuf_dma_contig_user_get() */
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static int
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dt3155_dma_contig_user_get(struct videobuf_dma_contig_memory *mem,
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struct videobuf_buffer *vb)
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{
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struct mm_struct *mm = current->mm;
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struct vm_area_struct *vma;
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unsigned long prev_pfn, this_pfn;
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unsigned long pages_done, user_address;
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int ret;
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mem->size = PAGE_ALIGN(vb->size);
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mem->is_userptr = 0;
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ret = -EINVAL;
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down_read(&mm->mmap_sem);
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vma = find_vma(mm, vb->baddr);
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if (!vma)
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goto out_up;
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if ((vb->baddr + mem->size) > vma->vm_end)
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goto out_up;
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pages_done = 0;
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prev_pfn = 0; /* kill warning */
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user_address = vb->baddr;
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while (pages_done < (mem->size >> PAGE_SHIFT)) {
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ret = follow_pfn(vma, user_address, &this_pfn);
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if (ret)
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break;
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if (pages_done == 0)
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mem->dma_handle = this_pfn << PAGE_SHIFT;
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else if (this_pfn != (prev_pfn + 1))
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ret = -EFAULT;
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if (ret)
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break;
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prev_pfn = this_pfn;
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user_address += PAGE_SIZE;
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pages_done++;
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}
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if (!ret)
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mem->is_userptr = 1;
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out_up:
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up_read(¤t->mm->mmap_sem);
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return ret;
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}
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/* same as videobuf_dma_contig_user_put() */
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static void
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dt3155_dma_contig_user_put(struct videobuf_dma_contig_memory *mem)
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{
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mem->is_userptr = 0;
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mem->dma_handle = 0;
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mem->size = 0;
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}
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/* same as videobuf_iolock() but uses allocations from the pool */
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static int
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dt3155_iolock(struct videobuf_queue *q, struct videobuf_buffer *vb,
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struct v4l2_framebuffer *fbuf)
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{
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struct videobuf_dma_contig_memory *mem = vb->priv;
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BUG_ON(!mem);
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MAGIC_CHECK(mem->magic, MAGIC_DC_MEM);
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switch (vb->memory) {
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case V4L2_MEMORY_MMAP:
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dev_dbg(q->dev, "%s memory method MMAP\n", __func__);
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/* All handling should be done by __videobuf_mmap_mapper() */
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if (!mem->vaddr) {
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dev_err(q->dev, "memory is not alloced/mmapped.\n");
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return -EINVAL;
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}
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break;
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case V4L2_MEMORY_USERPTR:
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dev_dbg(q->dev, "%s memory method USERPTR\n", __func__);
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/* handle pointer from user space */
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if (vb->baddr)
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return dt3155_dma_contig_user_get(mem, vb);
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/* allocate memory for the read() method */
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mem->size = PAGE_ALIGN(vb->size);
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mem->vaddr = dt3155_alloc_buffer(q->dev, mem->size,
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&mem->dma_handle, GFP_KERNEL);
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if (!mem->vaddr) {
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dev_err(q->dev, "dma_alloc_coherent %ld failed\n",
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mem->size);
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return -ENOMEM;
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}
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dev_dbg(q->dev, "dma_alloc_coherent data is at %p (%ld)\n",
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mem->vaddr, mem->size);
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break;
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case V4L2_MEMORY_OVERLAY:
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default:
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dev_dbg(q->dev, "%s memory method OVERLAY/unknown\n",
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__func__);
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return -EINVAL;
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}
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return 0;
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}
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/* same as videobuf_dma_contig_free() but uses the pool */
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void
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dt3155_dma_contig_free(struct videobuf_queue *q, struct videobuf_buffer *buf)
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{
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struct videobuf_dma_contig_memory *mem = buf->priv;
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/* mmapped memory can't be freed here, otherwise mmapped region
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would be released, while still needed. In this case, the memory
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release should happen inside videobuf_vm_close().
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So, it should free memory only if the memory were allocated for
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read() operation.
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*/
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if (buf->memory != V4L2_MEMORY_USERPTR)
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return;
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if (!mem)
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return;
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MAGIC_CHECK(mem->magic, MAGIC_DC_MEM);
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/* handle user space pointer case */
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if (buf->baddr) {
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dt3155_dma_contig_user_put(mem);
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return;
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}
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/* read() method */
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dt3155_free_buffer(q->dev, mem->size, mem->vaddr, mem->dma_handle);
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mem->vaddr = NULL;
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}
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/* same as videobuf_vm_open() */
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static void
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dt3155_vm_open(struct vm_area_struct *vma)
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{
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struct videobuf_mapping *map = vma->vm_private_data;
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dev_dbg(map->q->dev, "vm_open %p [count=%u,vma=%08lx-%08lx]\n",
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map, map->count, vma->vm_start, vma->vm_end);
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map->count++;
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}
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/* same as videobuf_vm_close(), but free to the pool */
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static void
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dt3155_vm_close(struct vm_area_struct *vma)
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{
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struct videobuf_mapping *map = vma->vm_private_data;
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struct videobuf_queue *q = map->q;
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int i;
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dev_dbg(map->q->dev, "vm_close %p [count=%u,vma=%08lx-%08lx]\n",
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map, map->count, vma->vm_start, vma->vm_end);
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map->count--;
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if (0 == map->count) {
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struct videobuf_dma_contig_memory *mem;
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dev_dbg(map->q->dev, "munmap %p q=%p\n", map, q);
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mutex_lock(&q->vb_lock);
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/* We need first to cancel streams, before unmapping */
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if (q->streaming)
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videobuf_queue_cancel(q);
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for (i = 0; i < VIDEO_MAX_FRAME; i++) {
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if (NULL == q->bufs[i])
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continue;
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if (q->bufs[i]->map != map)
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continue;
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mem = q->bufs[i]->priv;
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if (mem) {
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/* This callback is called only if kernel has
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allocated memory and this memory is mmapped.
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In this case, memory should be freed,
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in order to do memory unmap.
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*/
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MAGIC_CHECK(mem->magic, MAGIC_DC_MEM);
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/* vfree is not atomic - can't be
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called with IRQ's disabled
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*/
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dev_dbg(map->q->dev, "buf[%d] freeing %p\n",
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i, mem->vaddr);
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dt3155_free_buffer(q->dev, mem->size,
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mem->vaddr, mem->dma_handle);
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mem->vaddr = NULL;
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}
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q->bufs[i]->map = NULL;
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q->bufs[i]->baddr = 0;
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}
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kfree(map);
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mutex_unlock(&q->vb_lock);
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}
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}
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static const struct vm_operations_struct dt3155_vm_ops = {
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.open = dt3155_vm_open,
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.close = dt3155_vm_close,
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};
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/* same as videobuf_mmap_mapper(), but allocates from the pool */
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static int
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dt3155_mmap_mapper(struct videobuf_queue *q, struct vm_area_struct *vma)
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{
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struct videobuf_dma_contig_memory *mem;
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struct videobuf_mapping *map;
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unsigned int first;
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int retval;
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unsigned long size, offset = vma->vm_pgoff << PAGE_SHIFT;
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|
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dev_dbg(q->dev, "%s\n", __func__);
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if (!(vma->vm_flags & VM_WRITE) || !(vma->vm_flags & VM_SHARED))
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return -EINVAL;
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|
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/* look for first buffer to map */
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for (first = 0; first < VIDEO_MAX_FRAME; first++) {
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if (!q->bufs[first])
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continue;
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if (V4L2_MEMORY_MMAP != q->bufs[first]->memory)
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continue;
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if (q->bufs[first]->boff == offset)
|
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break;
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}
|
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if (VIDEO_MAX_FRAME == first) {
|
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dev_dbg(q->dev, "invalid user space offset [offset=0x%lx]\n",
|
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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");
|