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path: root/drivers/media/pci/dt3155/dt3155.c
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-rw-r--r--drivers/media/pci/dt3155/dt3155.c626
1 files changed, 626 insertions, 0 deletions
diff --git a/drivers/media/pci/dt3155/dt3155.c b/drivers/media/pci/dt3155/dt3155.c
new file mode 100644
index 000000000000..3131c2ee3b85
--- /dev/null
+++ b/drivers/media/pci/dt3155/dt3155.c
@@ -0,0 +1,626 @@
+/***************************************************************************
+ * Copyright (C) 2006-2010 by Marin Mitov *
+ * mitov@issp.bas.bg *
+ * *
+ * This program is free software; you can redistribute it and/or modify *
+ * it under the terms of the GNU General Public License as published by *
+ * the Free Software Foundation; either version 2 of the License, or *
+ * (at your option) any later version. *
+ * *
+ * This program is distributed in the hope that it will be useful, *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
+ * GNU General Public License for more details. *
+ * *
+ ***************************************************************************/
+
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/stringify.h>
+#include <linux/delay.h>
+#include <linux/kthread.h>
+#include <linux/slab.h>
+#include <media/v4l2-dev.h>
+#include <media/v4l2-ioctl.h>
+#include <media/v4l2-common.h>
+#include <media/videobuf2-dma-contig.h>
+
+#include "dt3155.h"
+
+#define DT3155_DEVICE_ID 0x1223
+
+/**
+ * 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)
+ return -EIO; /* error: NEW_CYCLE not cleared */
+ tmp = ioread32(addr + IIC_CSR1);
+ if (tmp & DIRECT_ABORT) {
+ /* reset DIRECT_ABORT bit */
+ iowrite32(DIRECT_ABORT, addr + IIC_CSR1);
+ return -EIO; /* error: DIRECT_ABORT set */
+ }
+ *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 writing 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)
+ return -EIO; /* error: NEW_CYCLE not cleared */
+ if (ioread32(addr + IIC_CSR1) & DIRECT_ABORT) {
+ /* reset DIRECT_ABORT bit */
+ iowrite32(DIRECT_ABORT, addr + IIC_CSR1);
+ return -EIO; /* error: DIRECT_ABORT set */
+ }
+ 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 writing 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/writing 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)
+ return -EIO; /* error: NEW_CYCLE not cleared */
+ if (ioread32(addr + IIC_CSR1) & DIRECT_ABORT) {
+ /* reset DIRECT_ABORT bit */
+ iowrite32(DIRECT_ABORT, addr + IIC_CSR1);
+ return -EIO; /* error: DIRECT_ABORT set */
+ }
+ return 0;
+}
+
+static int
+dt3155_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
+ unsigned int *nbuffers, unsigned int *num_planes,
+ unsigned int sizes[], void *alloc_ctxs[])
+
+{
+ struct dt3155_priv *pd = vb2_get_drv_priv(vq);
+ unsigned size = pd->width * pd->height;
+
+ if (vq->num_buffers + *nbuffers < 2)
+ *nbuffers = 2 - vq->num_buffers;
+ if (fmt && fmt->fmt.pix.sizeimage < size)
+ return -EINVAL;
+ *num_planes = 1;
+ sizes[0] = fmt ? fmt->fmt.pix.sizeimage : size;
+ alloc_ctxs[0] = pd->alloc_ctx;
+ return 0;
+}
+
+static int dt3155_buf_prepare(struct vb2_buffer *vb)
+{
+ struct dt3155_priv *pd = vb2_get_drv_priv(vb->vb2_queue);
+
+ vb2_set_plane_payload(vb, 0, pd->width * pd->height);
+ return 0;
+}
+
+static int dt3155_start_streaming(struct vb2_queue *q, unsigned count)
+{
+ struct dt3155_priv *pd = vb2_get_drv_priv(q);
+ struct vb2_buffer *vb = pd->curr_buf;
+ dma_addr_t dma_addr;
+
+ pd->sequence = 0;
+ dma_addr = vb2_dma_contig_plane_dma_addr(vb, 0);
+ iowrite32(dma_addr, pd->regs + EVEN_DMA_START);
+ iowrite32(dma_addr + pd->width, pd->regs + ODD_DMA_START);
+ iowrite32(pd->width, pd->regs + EVEN_DMA_STRIDE);
+ iowrite32(pd->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;
+}
+
+static void dt3155_stop_streaming(struct vb2_queue *q)
+{
+ struct dt3155_priv *pd = vb2_get_drv_priv(q);
+ struct vb2_buffer *vb;
+
+ spin_lock_irq(&pd->lock);
+ /* stop the board */
+ write_i2c_reg_nowait(pd->regs, CSR2, pd->csr2);
+ iowrite32(FIFO_EN | SRST | FLD_CRPT_ODD | FLD_CRPT_EVEN |
+ FLD_DN_ODD | FLD_DN_EVEN, pd->regs + CSR1);
+ /* disable interrupts, clear all irq flags */
+ iowrite32(FLD_START | FLD_END_EVEN | FLD_END_ODD, pd->regs + INT_CSR);
+ spin_unlock_irq(&pd->lock);
+
+ /*
+ * It is not clear whether the DMA stops at once or whether it
+ * will finish the current frame or field first. To be on the
+ * safe side we wait a bit.
+ */
+ msleep(45);
+
+ spin_lock_irq(&pd->lock);
+ if (pd->curr_buf) {
+ vb2_buffer_done(pd->curr_buf, VB2_BUF_STATE_ERROR);
+ pd->curr_buf = NULL;
+ }
+
+ while (!list_empty(&pd->dmaq)) {
+ vb = list_first_entry(&pd->dmaq, typeof(*vb), done_entry);
+ list_del(&vb->done_entry);
+ vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
+ }
+ spin_unlock_irq(&pd->lock);
+}
+
+static void dt3155_buf_queue(struct vb2_buffer *vb)
+{
+ struct dt3155_priv *pd = vb2_get_drv_priv(vb->vb2_queue);
+
+ /* pd->vidq.streaming = 1 when dt3155_buf_queue() is invoked */
+ spin_lock_irq(&pd->lock);
+ if (pd->curr_buf)
+ list_add_tail(&vb->done_entry, &pd->dmaq);
+ else
+ pd->curr_buf = vb;
+ spin_unlock_irq(&pd->lock);
+}
+
+static const struct vb2_ops q_ops = {
+ .queue_setup = dt3155_queue_setup,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+ .buf_prepare = dt3155_buf_prepare,
+ .start_streaming = dt3155_start_streaming,
+ .stop_streaming = dt3155_stop_streaming,
+ .buf_queue = dt3155_buf_queue,
+};
+
+static irqreturn_t dt3155_irq_handler_even(int irq, void *dev_id)
+{
+ struct dt3155_priv *ipd = dev_id;
+ struct vb2_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);
+ return IRQ_HANDLED; /* start of field irq */
+ }
+ tmp = ioread32(ipd->regs + CSR1) & (FLD_CRPT_EVEN | FLD_CRPT_ODD);
+ if (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 && !list_empty(&ipd->dmaq)) {
+ v4l2_get_timestamp(&ipd->curr_buf->v4l2_buf.timestamp);
+ ipd->curr_buf->v4l2_buf.sequence = ipd->sequence++;
+ ipd->curr_buf->v4l2_buf.field = V4L2_FIELD_NONE;
+ vb2_buffer_done(ipd->curr_buf, VB2_BUF_STATE_DONE);
+
+ ivb = list_first_entry(&ipd->dmaq, typeof(*ivb), done_entry);
+ list_del(&ivb->done_entry);
+ ipd->curr_buf = ivb;
+ dma_addr = vb2_dma_contig_plane_dma_addr(ivb, 0);
+ iowrite32(dma_addr, ipd->regs + EVEN_DMA_START);
+ iowrite32(dma_addr + ipd->width, ipd->regs + ODD_DMA_START);
+ iowrite32(ipd->width, ipd->regs + EVEN_DMA_STRIDE);
+ iowrite32(ipd->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;
+}
+
+static const struct v4l2_file_operations dt3155_fops = {
+ .owner = THIS_MODULE,
+ .open = v4l2_fh_open,
+ .release = vb2_fop_release,
+ .unlocked_ioctl = video_ioctl2,
+ .read = vb2_fop_read,
+ .mmap = vb2_fop_mmap,
+ .poll = vb2_fop_poll
+};
+
+static int dt3155_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->device_caps = V4L2_CAP_VIDEO_CAPTURE |
+ V4L2_CAP_STREAMING | V4L2_CAP_READWRITE;
+ cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
+ return 0;
+}
+
+static int dt3155_enum_fmt_vid_cap(struct file *filp, void *p, struct v4l2_fmtdesc *f)
+{
+ if (f->index)
+ return -EINVAL;
+ f->pixelformat = V4L2_PIX_FMT_GREY;
+ strcpy(f->description, "8-bit Greyscale");
+ return 0;
+}
+
+static int dt3155_fmt_vid_cap(struct file *filp, void *p, struct v4l2_format *f)
+{
+ struct dt3155_priv *pd = video_drvdata(filp);
+
+ f->fmt.pix.width = pd->width;
+ f->fmt.pix.height = pd->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 = V4L2_COLORSPACE_SMPTE170M;
+ return 0;
+}
+
+static int dt3155_g_std(struct file *filp, void *p, v4l2_std_id *norm)
+{
+ struct dt3155_priv *pd = video_drvdata(filp);
+
+ *norm = pd->std;
+ return 0;
+}
+
+static int dt3155_s_std(struct file *filp, void *p, v4l2_std_id norm)
+{
+ struct dt3155_priv *pd = video_drvdata(filp);
+
+ if (pd->std == norm)
+ return 0;
+ if (vb2_is_busy(&pd->vidq))
+ return -EBUSY;
+ pd->std = norm;
+ if (pd->std & V4L2_STD_525_60) {
+ pd->csr2 = VT_60HZ;
+ pd->width = 640;
+ pd->height = 480;
+ } else {
+ pd->csr2 = VT_50HZ;
+ pd->width = 768;
+ pd->height = 576;
+ }
+ return 0;
+}
+
+static int dt3155_enum_input(struct file *filp, void *p, struct v4l2_input *input)
+{
+ if (input->index > 3)
+ return -EINVAL;
+ if (input->index)
+ snprintf(input->name, sizeof(input->name), "VID%d", input->index);
+ else
+ strlcpy(input->name, "J2/VID0", sizeof(input->name));
+ input->type = V4L2_INPUT_TYPE_CAMERA;
+ input->std = V4L2_STD_ALL;
+ input->status = 0;
+ return 0;
+}
+
+static int dt3155_g_input(struct file *filp, void *p, unsigned int *i)
+{
+ struct dt3155_priv *pd = video_drvdata(filp);
+
+ *i = pd->input;
+ return 0;
+}
+
+static int dt3155_s_input(struct file *filp, void *p, unsigned int i)
+{
+ struct dt3155_priv *pd = video_drvdata(filp);
+
+ if (i > 3)
+ return -EINVAL;
+ pd->input = i;
+ write_i2c_reg(pd->regs, AD_ADDR, AD_CMD_REG);
+ write_i2c_reg(pd->regs, AD_CMD, (i << 6) | (i << 4) | SYNC_LVL_3);
+ return 0;
+}
+
+static const struct v4l2_ioctl_ops dt3155_ioctl_ops = {
+ .vidioc_querycap = dt3155_querycap,
+ .vidioc_enum_fmt_vid_cap = dt3155_enum_fmt_vid_cap,
+ .vidioc_try_fmt_vid_cap = dt3155_fmt_vid_cap,
+ .vidioc_g_fmt_vid_cap = dt3155_fmt_vid_cap,
+ .vidioc_s_fmt_vid_cap = dt3155_fmt_vid_cap,
+ .vidioc_reqbufs = vb2_ioctl_reqbufs,
+ .vidioc_create_bufs = vb2_ioctl_create_bufs,
+ .vidioc_querybuf = vb2_ioctl_querybuf,
+ .vidioc_expbuf = vb2_ioctl_expbuf,
+ .vidioc_qbuf = vb2_ioctl_qbuf,
+ .vidioc_dqbuf = vb2_ioctl_dqbuf,
+ .vidioc_streamon = vb2_ioctl_streamon,
+ .vidioc_streamoff = vb2_ioctl_streamoff,
+ .vidioc_g_std = dt3155_g_std,
+ .vidioc_s_std = dt3155_s_std,
+ .vidioc_enum_input = dt3155_enum_input,
+ .vidioc_g_input = dt3155_g_input,
+ .vidioc_s_input = dt3155_s_input,
+};
+
+static int dt3155_init_board(struct dt3155_priv *pd)
+{
+ struct pci_dev *pdev = pd->pdev;
+ int i;
+ u8 tmp = 0;
+
+ pci_set_master(pdev); /* dt3155 needs it */
+
+ /* resetting the adapter */
+ iowrite32(ADDR_ERR_ODD | ADDR_ERR_EVEN | FLD_CRPT_ODD | FLD_CRPT_EVEN |
+ FLD_DN_ODD | FLD_DN_EVEN, pd->regs + CSR1);
+ mmiowb();
+ msleep(20);
+
+ /* initializing adapter 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 channel 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);
+
+ /* disable all irqs, clear all irq flags */
+ iowrite32(FLD_START | FLD_END_EVEN | FLD_END_ODD,
+ pd->regs + INT_CSR);
+
+ 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_empty,
+ .tvnorms = V4L2_STD_ALL,
+};
+
+static int dt3155_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ int err;
+ struct dt3155_priv *pd;
+
+ err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+ if (err)
+ return -ENODEV;
+ pd = devm_kzalloc(&pdev->dev, sizeof(*pd), GFP_KERNEL);
+ if (!pd)
+ return -ENOMEM;
+
+ err = v4l2_device_register(&pdev->dev, &pd->v4l2_dev);
+ if (err)
+ return err;
+ pd->vdev = dt3155_vdev;
+ pd->vdev.v4l2_dev = &pd->v4l2_dev;
+ video_set_drvdata(&pd->vdev, pd); /* for use in video_fops */
+ pd->pdev = pdev;
+ pd->std = V4L2_STD_625_50;
+ pd->csr2 = VT_50HZ;
+ pd->width = 768;
+ pd->height = 576;
+ INIT_LIST_HEAD(&pd->dmaq);
+ mutex_init(&pd->mux);
+ pd->vdev.lock = &pd->mux; /* for locking v4l2_file_operations */
+ pd->vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ pd->vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+ pd->vidq.io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ;
+ pd->vidq.ops = &q_ops;
+ pd->vidq.mem_ops = &vb2_dma_contig_memops;
+ pd->vidq.drv_priv = pd;
+ pd->vidq.min_buffers_needed = 2;
+ pd->vidq.lock = &pd->mux; /* for locking v4l2_file_operations */
+ pd->vdev.queue = &pd->vidq;
+ err = vb2_queue_init(&pd->vidq);
+ if (err < 0)
+ goto err_v4l2_dev_unreg;
+ pd->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
+ if (IS_ERR(pd->alloc_ctx)) {
+ dev_err(&pdev->dev, "Can't allocate buffer context");
+ err = PTR_ERR(pd->alloc_ctx);
+ goto err_v4l2_dev_unreg;
+ }
+ spin_lock_init(&pd->lock);
+ pd->config = ACQ_MODE_EVEN;
+ err = pci_enable_device(pdev);
+ if (err)
+ goto err_free_ctx;
+ err = pci_request_region(pdev, 0, pci_name(pdev));
+ if (err)
+ goto err_pci_disable;
+ pd->regs = pci_iomap(pdev, 0, pci_resource_len(pd->pdev, 0));
+ if (!pd->regs) {
+ err = -ENOMEM;
+ goto err_free_reg;
+ }
+ err = dt3155_init_board(pd);
+ if (err)
+ goto err_iounmap;
+ err = request_irq(pd->pdev->irq, dt3155_irq_handler_even,
+ IRQF_SHARED, DT3155_NAME, pd);
+ if (err)
+ goto err_iounmap;
+ err = video_register_device(&pd->vdev, VFL_TYPE_GRABBER, -1);
+ if (err)
+ goto err_free_irq;
+ dev_info(&pdev->dev, "/dev/video%i is ready\n", pd->vdev.minor);
+ return 0; /* success */
+
+err_free_irq:
+ free_irq(pd->pdev->irq, pd);
+err_iounmap:
+ pci_iounmap(pdev, pd->regs);
+err_free_reg:
+ pci_release_region(pdev, 0);
+err_pci_disable:
+ pci_disable_device(pdev);
+err_free_ctx:
+ vb2_dma_contig_cleanup_ctx(pd->alloc_ctx);
+err_v4l2_dev_unreg:
+ v4l2_device_unregister(&pd->v4l2_dev);
+ return err;
+}
+
+static void dt3155_remove(struct pci_dev *pdev)
+{
+ struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev);
+ struct dt3155_priv *pd = container_of(v4l2_dev, struct dt3155_priv, v4l2_dev);
+
+ video_unregister_device(&pd->vdev);
+ free_irq(pd->pdev->irq, pd);
+ vb2_queue_release(&pd->vidq);
+ v4l2_device_unregister(&pd->v4l2_dev);
+ pci_iounmap(pdev, pd->regs);
+ pci_release_region(pdev, 0);
+ pci_disable_device(pdev);
+ vb2_dma_contig_cleanup_ctx(pd->alloc_ctx);
+}
+
+static const struct pci_device_id pci_ids[] = {
+ { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 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 = dt3155_remove,
+};
+
+module_pci_driver(pci_driver);
+
+MODULE_DESCRIPTION("video4linux pci-driver for dt3155 frame grabber");
+MODULE_AUTHOR("Marin Mitov <mitov@issp.bas.bg>");
+MODULE_VERSION(DT3155_VERSION);
+MODULE_LICENSE("GPL");

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