1 /***************************************************************************
2 * Copyright (C) 2006-2010 by Marin Mitov *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) any later version. *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program; if not, write to the *
17 * Free Software Foundation, Inc., *
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
19 ***************************************************************************/
21 #include <linux/module.h>
22 #include <linux/version.h>
23 #include <linux/stringify.h>
24 #include <linux/delay.h>
25 #include <linux/kthread.h>
26 #include <linux/slab.h>
27 #include <media/v4l2-dev.h>
28 #include <media/v4l2-ioctl.h>
29 #include <media/videobuf2-dma-contig.h>
31 #include "dt3155v4l.h"
33 #define DT3155_VENDOR_ID 0x8086
34 #define DT3155_DEVICE_ID 0x1223
36 /* DT3155_CHUNK_SIZE is 4M (2^22) 8 full size buffers */
37 #define DT3155_CHUNK_SIZE (1U << 22)
39 #define DT3155_COH_FLAGS (GFP_KERNEL | GFP_DMA32 | __GFP_COLD | __GFP_NOWARN)
41 #define DT3155_BUF_SIZE (768 * 576)
43 #ifdef CONFIG_DT3155_STREAMING
44 #define DT3155_CAPTURE_METHOD V4L2_CAP_STREAMING
46 #define DT3155_CAPTURE_METHOD V4L2_CAP_READWRITE
49 /* global initializers (for all boards) */
50 #ifdef CONFIG_DT3155_CCIR
51 static const u8 csr2_init = VT_50HZ;
52 #define DT3155_CURRENT_NORM V4L2_STD_625_50
53 static const unsigned int img_width = 768;
54 static const unsigned int img_height = 576;
55 static const unsigned int frames_per_sec = 25;
56 static const struct v4l2_fmtdesc frame_std[] = {
59 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
61 .description = "CCIR/50Hz 8 bits gray",
62 .pixelformat = V4L2_PIX_FMT_GREY,
66 static const u8 csr2_init = VT_60HZ;
67 #define DT3155_CURRENT_NORM V4L2_STD_525_60
68 static const unsigned int img_width = 640;
69 static const unsigned int img_height = 480;
70 static const unsigned int frames_per_sec = 30;
71 static const struct v4l2_fmtdesc frame_std[] = {
74 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
76 .description = "RS-170/60Hz 8 bits gray",
77 .pixelformat = V4L2_PIX_FMT_GREY,
82 #define NUM_OF_FORMATS ARRAY_SIZE(frame_std)
84 static u8 config_init = ACQ_MODE_EVEN;
87 * read_i2c_reg - reads an internal i2c register
89 * @addr: dt3155 mmio base address
90 * @index: index (internal address) of register to read
91 * @data: pointer to byte the read data will be placed in
93 * returns: zero on success or error code
95 * This function starts reading the specified (by index) register
96 * and busy waits for the process to finish. The result is placed
97 * in a byte pointed by data.
100 read_i2c_reg(void __iomem *addr, u8 index, u8 *data)
104 iowrite32((tmp<<17) | IIC_READ, addr + IIC_CSR2);
106 udelay(45); /* wait at least 43 usec for NEW_CYCLE to clear */
107 if (ioread32(addr + IIC_CSR2) & NEW_CYCLE)
108 return -EIO; /* error: NEW_CYCLE not cleared */
109 tmp = ioread32(addr + IIC_CSR1);
110 if (tmp & DIRECT_ABORT) {
111 /* reset DIRECT_ABORT bit */
112 iowrite32(DIRECT_ABORT, addr + IIC_CSR1);
113 return -EIO; /* error: DIRECT_ABORT set */
120 * write_i2c_reg - writes to an internal i2c register
122 * @addr: dt3155 mmio base address
123 * @index: index (internal address) of register to read
124 * @data: data to be written
126 * returns: zero on success or error code
128 * This function starts writting the specified (by index) register
129 * and busy waits for the process to finish.
132 write_i2c_reg(void __iomem *addr, u8 index, u8 data)
136 iowrite32((tmp<<17) | IIC_WRITE | data, addr + IIC_CSR2);
138 udelay(65); /* wait at least 63 usec for NEW_CYCLE to clear */
139 if (ioread32(addr + IIC_CSR2) & NEW_CYCLE)
140 return -EIO; /* error: NEW_CYCLE not cleared */
141 if (ioread32(addr + IIC_CSR1) & DIRECT_ABORT) {
142 /* reset DIRECT_ABORT bit */
143 iowrite32(DIRECT_ABORT, addr + IIC_CSR1);
144 return -EIO; /* error: DIRECT_ABORT set */
150 * write_i2c_reg_nowait - writes to an internal i2c register
152 * @addr: dt3155 mmio base address
153 * @index: index (internal address) of register to read
154 * @data: data to be written
156 * This function starts writting the specified (by index) register
159 static void write_i2c_reg_nowait(void __iomem *addr, u8 index, u8 data)
163 iowrite32((tmp<<17) | IIC_WRITE | data, addr + IIC_CSR2);
168 * wait_i2c_reg - waits the read/write to finish
170 * @addr: dt3155 mmio base address
172 * returns: zero on success or error code
174 * This function waits reading/writting to finish.
176 static int wait_i2c_reg(void __iomem *addr)
178 if (ioread32(addr + IIC_CSR2) & NEW_CYCLE)
179 udelay(65); /* wait at least 63 usec for NEW_CYCLE to clear */
180 if (ioread32(addr + IIC_CSR2) & NEW_CYCLE)
181 return -EIO; /* error: NEW_CYCLE not cleared */
182 if (ioread32(addr + IIC_CSR1) & DIRECT_ABORT) {
183 /* reset DIRECT_ABORT bit */
184 iowrite32(DIRECT_ABORT, addr + IIC_CSR1);
185 return -EIO; /* error: DIRECT_ABORT set */
191 dt3155_start_acq(struct dt3155_priv *pd)
193 struct vb2_buffer *vb = pd->curr_buf;
196 dma_addr = vb2_dma_contig_plane_dma_addr(vb, 0);
197 iowrite32(dma_addr, pd->regs + EVEN_DMA_START);
198 iowrite32(dma_addr + img_width, pd->regs + ODD_DMA_START);
199 iowrite32(img_width, pd->regs + EVEN_DMA_STRIDE);
200 iowrite32(img_width, pd->regs + ODD_DMA_STRIDE);
201 /* enable interrupts, clear all irq flags */
202 iowrite32(FLD_START_EN | FLD_END_ODD_EN | FLD_START |
203 FLD_END_EVEN | FLD_END_ODD, pd->regs + INT_CSR);
204 iowrite32(FIFO_EN | SRST | FLD_CRPT_ODD | FLD_CRPT_EVEN |
205 FLD_DN_ODD | FLD_DN_EVEN | CAP_CONT_EVEN | CAP_CONT_ODD,
207 wait_i2c_reg(pd->regs);
208 write_i2c_reg(pd->regs, CONFIG, pd->config);
209 write_i2c_reg(pd->regs, EVEN_CSR, CSR_ERROR | CSR_DONE);
210 write_i2c_reg(pd->regs, ODD_CSR, CSR_ERROR | CSR_DONE);
212 /* start the board */
213 write_i2c_reg(pd->regs, CSR2, pd->csr2 | BUSY_EVEN | BUSY_ODD);
214 return 0; /* success */
218 * driver-specific callbacks (vb2_ops)
221 dt3155_queue_setup(struct vb2_queue *q, const struct v4l2_format *fmt,
222 unsigned int *num_buffers, unsigned int *num_planes,
223 unsigned int sizes[], void *alloc_ctxs[])
226 struct dt3155_priv *pd = vb2_get_drv_priv(q);
229 if (*num_buffers == 0)
232 sizes[0] = img_width * img_height;
233 if (pd->q->alloc_ctx[0])
235 ret = vb2_dma_contig_init_ctx(&pd->pdev->dev);
238 pd->q->alloc_ctx[0] = ret;
243 dt3155_wait_prepare(struct vb2_queue *q)
245 struct dt3155_priv *pd = vb2_get_drv_priv(q);
247 mutex_unlock(pd->vdev->lock);
251 dt3155_wait_finish(struct vb2_queue *q)
253 struct dt3155_priv *pd = vb2_get_drv_priv(q);
255 mutex_lock(pd->vdev->lock);
259 dt3155_buf_prepare(struct vb2_buffer *vb)
261 vb2_set_plane_payload(vb, 0, img_width * img_height);
266 dt3155_stop_streaming(struct vb2_queue *q)
268 struct dt3155_priv *pd = vb2_get_drv_priv(q);
269 struct vb2_buffer *vb;
271 spin_lock_irq(&pd->lock);
272 while (!list_empty(&pd->dmaq)) {
273 vb = list_first_entry(&pd->dmaq, typeof(*vb), done_entry);
274 list_del(&vb->done_entry);
275 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
277 spin_unlock_irq(&pd->lock);
278 msleep(45); /* irq hendler will stop the hardware */
283 dt3155_buf_queue(struct vb2_buffer *vb)
285 struct dt3155_priv *pd = vb2_get_drv_priv(vb->vb2_queue);
287 /* pd->q->streaming = 1 when dt3155_buf_queue() is invoked */
288 spin_lock_irq(&pd->lock);
290 list_add_tail(&vb->done_entry, &pd->dmaq);
293 dt3155_start_acq(pd);
295 spin_unlock_irq(&pd->lock);
298 * end driver-specific callbacks
301 const struct vb2_ops q_ops = {
302 .queue_setup = dt3155_queue_setup,
303 .wait_prepare = dt3155_wait_prepare,
304 .wait_finish = dt3155_wait_finish,
305 .buf_prepare = dt3155_buf_prepare,
306 .stop_streaming = dt3155_stop_streaming,
307 .buf_queue = dt3155_buf_queue,
311 dt3155_irq_handler_even(int irq, void *dev_id)
313 struct dt3155_priv *ipd = dev_id;
314 struct vb2_buffer *ivb;
318 tmp = ioread32(ipd->regs + INT_CSR) & (FLD_START | FLD_END_ODD);
320 return IRQ_NONE; /* not our irq */
321 if ((tmp & FLD_START) && !(tmp & FLD_END_ODD)) {
322 iowrite32(FLD_START_EN | FLD_END_ODD_EN | FLD_START,
323 ipd->regs + INT_CSR);
325 return IRQ_HANDLED; /* start of field irq */
327 if ((tmp & FLD_START) && (tmp & FLD_END_ODD))
328 ipd->stats.start_before_end++;
329 /* check for corrupted fields */
330 /* write_i2c_reg(ipd->regs, EVEN_CSR, CSR_ERROR | CSR_DONE); */
331 /* write_i2c_reg(ipd->regs, ODD_CSR, CSR_ERROR | CSR_DONE); */
332 tmp = ioread32(ipd->regs + CSR1) & (FLD_CRPT_EVEN | FLD_CRPT_ODD);
334 ipd->stats.corrupted_fields++;
335 iowrite32(FIFO_EN | SRST | FLD_CRPT_ODD | FLD_CRPT_EVEN |
336 FLD_DN_ODD | FLD_DN_EVEN |
337 CAP_CONT_EVEN | CAP_CONT_ODD,
342 spin_lock(&ipd->lock);
344 do_gettimeofday(&ipd->curr_buf->v4l2_buf.timestamp);
345 ipd->curr_buf->v4l2_buf.sequence = (ipd->field_count) >> 1;
346 vb2_buffer_done(ipd->curr_buf, VB2_BUF_STATE_DONE);
349 if (!ipd->q->streaming || list_empty(&ipd->dmaq))
351 ivb = list_first_entry(&ipd->dmaq, typeof(*ivb), done_entry);
352 list_del(&ivb->done_entry);
354 dma_addr = vb2_dma_contig_plane_dma_addr(ivb, 0);
355 iowrite32(dma_addr, ipd->regs + EVEN_DMA_START);
356 iowrite32(dma_addr + img_width, ipd->regs + ODD_DMA_START);
357 iowrite32(img_width, ipd->regs + EVEN_DMA_STRIDE);
358 iowrite32(img_width, ipd->regs + ODD_DMA_STRIDE);
360 /* enable interrupts, clear all irq flags */
361 iowrite32(FLD_START_EN | FLD_END_ODD_EN | FLD_START |
362 FLD_END_EVEN | FLD_END_ODD, ipd->regs + INT_CSR);
363 spin_unlock(&ipd->lock);
367 ipd->curr_buf = NULL;
369 write_i2c_reg_nowait(ipd->regs, CSR2, ipd->csr2);
370 iowrite32(FIFO_EN | SRST | FLD_CRPT_ODD | FLD_CRPT_EVEN |
371 FLD_DN_ODD | FLD_DN_EVEN, ipd->regs + CSR1);
372 /* disable interrupts, clear all irq flags */
373 iowrite32(FLD_START | FLD_END_EVEN | FLD_END_ODD, ipd->regs + INT_CSR);
374 spin_unlock(&ipd->lock);
379 dt3155_open(struct file *filp)
382 struct dt3155_priv *pd = video_drvdata(filp);
384 if (mutex_lock_interruptible(&pd->mux))
387 pd->q = kzalloc(sizeof(*pd->q), GFP_KERNEL);
390 goto err_alloc_queue;
392 pd->q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
393 pd->q->io_modes = VB2_READ | VB2_MMAP;
395 pd->q->mem_ops = &vb2_dma_contig_memops;
396 pd->q->drv_priv = pd;
399 ret = vb2_queue_init(pd->q);
402 INIT_LIST_HEAD(&pd->dmaq);
403 spin_lock_init(&pd->lock);
404 /* disable all irqs, clear all irq flags */
405 iowrite32(FLD_START | FLD_END_EVEN | FLD_END_ODD,
407 ret = request_irq(pd->pdev->irq, dt3155_irq_handler_even,
408 IRQF_SHARED, DT3155_NAME, pd);
410 goto err_request_irq;
413 return 0; /* success */
418 mutex_unlock(&pd->mux);
423 dt3155_release(struct file *filp)
425 struct dt3155_priv *pd = video_drvdata(filp);
427 mutex_lock(&pd->mux);
429 BUG_ON(pd->users < 0);
431 vb2_queue_release(pd->q);
432 free_irq(pd->pdev->irq, pd);
433 if (pd->q->alloc_ctx[0])
434 vb2_dma_contig_cleanup_ctx(pd->q->alloc_ctx[0]);
438 mutex_unlock(&pd->mux);
443 dt3155_read(struct file *filp, char __user *user, size_t size, loff_t *loff)
445 struct dt3155_priv *pd = video_drvdata(filp);
448 if (mutex_lock_interruptible(&pd->mux))
450 res = vb2_read(pd->q, user, size, loff, filp->f_flags & O_NONBLOCK);
451 mutex_unlock(&pd->mux);
456 dt3155_poll(struct file *filp, struct poll_table_struct *polltbl)
458 struct dt3155_priv *pd = video_drvdata(filp);
461 mutex_lock(&pd->mux);
462 res = vb2_poll(pd->q, filp, polltbl);
463 mutex_unlock(&pd->mux);
468 dt3155_mmap(struct file *filp, struct vm_area_struct *vma)
470 struct dt3155_priv *pd = video_drvdata(filp);
473 if (mutex_lock_interruptible(&pd->mux))
475 res = vb2_mmap(pd->q, vma);
476 mutex_unlock(&pd->mux);
480 static const struct v4l2_file_operations dt3155_fops = {
481 .owner = THIS_MODULE,
483 .release = dt3155_release,
486 .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */
491 dt3155_ioc_streamon(struct file *filp, void *p, enum v4l2_buf_type type)
493 struct dt3155_priv *pd = video_drvdata(filp);
495 return vb2_streamon(pd->q, type);
499 dt3155_ioc_streamoff(struct file *filp, void *p, enum v4l2_buf_type type)
501 struct dt3155_priv *pd = video_drvdata(filp);
503 return vb2_streamoff(pd->q, type);
507 dt3155_ioc_querycap(struct file *filp, void *p, struct v4l2_capability *cap)
509 struct dt3155_priv *pd = video_drvdata(filp);
511 strcpy(cap->driver, DT3155_NAME);
512 strcpy(cap->card, DT3155_NAME " frame grabber");
513 sprintf(cap->bus_info, "PCI:%s", pci_name(pd->pdev));
515 KERNEL_VERSION(DT3155_VER_MAJ, DT3155_VER_MIN, DT3155_VER_EXT);
516 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
517 DT3155_CAPTURE_METHOD;
522 dt3155_ioc_enum_fmt_vid_cap(struct file *filp, void *p, struct v4l2_fmtdesc *f)
524 if (f->index >= NUM_OF_FORMATS)
526 *f = frame_std[f->index];
531 dt3155_ioc_g_fmt_vid_cap(struct file *filp, void *p, struct v4l2_format *f)
533 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
535 f->fmt.pix.width = img_width;
536 f->fmt.pix.height = img_height;
537 f->fmt.pix.pixelformat = V4L2_PIX_FMT_GREY;
538 f->fmt.pix.field = V4L2_FIELD_NONE;
539 f->fmt.pix.bytesperline = f->fmt.pix.width;
540 f->fmt.pix.sizeimage = f->fmt.pix.width * f->fmt.pix.height;
541 f->fmt.pix.colorspace = 0;
547 dt3155_ioc_try_fmt_vid_cap(struct file *filp, void *p, struct v4l2_format *f)
549 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
551 if (f->fmt.pix.width == img_width &&
552 f->fmt.pix.height == img_height &&
553 f->fmt.pix.pixelformat == V4L2_PIX_FMT_GREY &&
554 f->fmt.pix.field == V4L2_FIELD_NONE &&
555 f->fmt.pix.bytesperline == f->fmt.pix.width &&
556 f->fmt.pix.sizeimage == f->fmt.pix.width * f->fmt.pix.height)
563 dt3155_ioc_s_fmt_vid_cap(struct file *filp, void *p, struct v4l2_format *f)
565 return dt3155_ioc_g_fmt_vid_cap(filp, p, f);
569 dt3155_ioc_reqbufs(struct file *filp, void *p, struct v4l2_requestbuffers *b)
571 struct dt3155_priv *pd = video_drvdata(filp);
573 return vb2_reqbufs(pd->q, b);
577 dt3155_ioc_querybuf(struct file *filp, void *p, struct v4l2_buffer *b)
579 struct dt3155_priv *pd = video_drvdata(filp);
581 return vb2_querybuf(pd->q, b);
585 dt3155_ioc_qbuf(struct file *filp, void *p, struct v4l2_buffer *b)
587 struct dt3155_priv *pd = video_drvdata(filp);
589 return vb2_qbuf(pd->q, b);
593 dt3155_ioc_dqbuf(struct file *filp, void *p, struct v4l2_buffer *b)
595 struct dt3155_priv *pd = video_drvdata(filp);
597 return vb2_dqbuf(pd->q, b, filp->f_flags & O_NONBLOCK);
601 dt3155_ioc_querystd(struct file *filp, void *p, v4l2_std_id *norm)
603 *norm = DT3155_CURRENT_NORM;
608 dt3155_ioc_g_std(struct file *filp, void *p, v4l2_std_id *norm)
610 *norm = DT3155_CURRENT_NORM;
615 dt3155_ioc_s_std(struct file *filp, void *p, v4l2_std_id *norm)
617 if (*norm & DT3155_CURRENT_NORM)
623 dt3155_ioc_enum_input(struct file *filp, void *p, struct v4l2_input *input)
627 strcpy(input->name, "Coax in");
628 input->type = V4L2_INPUT_TYPE_CAMERA;
630 * FIXME: input->std = 0 according to v4l2 API
631 * VIDIOC_G_STD, VIDIOC_S_STD, VIDIOC_QUERYSTD and VIDIOC_ENUMSTD
632 * should return -EINVAL
634 input->std = DT3155_CURRENT_NORM;
635 input->status = 0;/* FIXME: add sync detection & V4L2_IN_ST_NO_H_LOCK */
640 dt3155_ioc_g_input(struct file *filp, void *p, unsigned int *i)
647 dt3155_ioc_s_input(struct file *filp, void *p, unsigned int i)
655 dt3155_ioc_g_parm(struct file *filp, void *p, struct v4l2_streamparm *parms)
657 if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
659 parms->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
660 parms->parm.capture.capturemode = 0;
661 parms->parm.capture.timeperframe.numerator = 1001;
662 parms->parm.capture.timeperframe.denominator = frames_per_sec * 1000;
663 parms->parm.capture.extendedmode = 0;
664 parms->parm.capture.readbuffers = 1; /* FIXME: 2 buffers? */
669 dt3155_ioc_s_parm(struct file *filp, void *p, struct v4l2_streamparm *parms)
671 if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
673 parms->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
674 parms->parm.capture.capturemode = 0;
675 parms->parm.capture.timeperframe.numerator = 1001;
676 parms->parm.capture.timeperframe.denominator = frames_per_sec * 1000;
677 parms->parm.capture.extendedmode = 0;
678 parms->parm.capture.readbuffers = 1; /* FIXME: 2 buffers? */
682 static const struct v4l2_ioctl_ops dt3155_ioctl_ops = {
683 .vidioc_streamon = dt3155_ioc_streamon,
684 .vidioc_streamoff = dt3155_ioc_streamoff,
685 .vidioc_querycap = dt3155_ioc_querycap,
687 .vidioc_g_priority = dt3155_ioc_g_priority,
688 .vidioc_s_priority = dt3155_ioc_s_priority,
690 .vidioc_enum_fmt_vid_cap = dt3155_ioc_enum_fmt_vid_cap,
691 .vidioc_try_fmt_vid_cap = dt3155_ioc_try_fmt_vid_cap,
692 .vidioc_g_fmt_vid_cap = dt3155_ioc_g_fmt_vid_cap,
693 .vidioc_s_fmt_vid_cap = dt3155_ioc_s_fmt_vid_cap,
694 .vidioc_reqbufs = dt3155_ioc_reqbufs,
695 .vidioc_querybuf = dt3155_ioc_querybuf,
696 .vidioc_qbuf = dt3155_ioc_qbuf,
697 .vidioc_dqbuf = dt3155_ioc_dqbuf,
698 .vidioc_querystd = dt3155_ioc_querystd,
699 .vidioc_g_std = dt3155_ioc_g_std,
700 .vidioc_s_std = dt3155_ioc_s_std,
701 .vidioc_enum_input = dt3155_ioc_enum_input,
702 .vidioc_g_input = dt3155_ioc_g_input,
703 .vidioc_s_input = dt3155_ioc_s_input,
705 .vidioc_queryctrl = dt3155_ioc_queryctrl,
706 .vidioc_g_ctrl = dt3155_ioc_g_ctrl,
707 .vidioc_s_ctrl = dt3155_ioc_s_ctrl,
708 .vidioc_querymenu = dt3155_ioc_querymenu,
709 .vidioc_g_ext_ctrls = dt3155_ioc_g_ext_ctrls,
710 .vidioc_s_ext_ctrls = dt3155_ioc_s_ext_ctrls,
712 .vidioc_g_parm = dt3155_ioc_g_parm,
713 .vidioc_s_parm = dt3155_ioc_s_parm,
715 .vidioc_cropcap = dt3155_ioc_cropcap,
716 .vidioc_g_crop = dt3155_ioc_g_crop,
717 .vidioc_s_crop = dt3155_ioc_s_crop,
718 .vidioc_enum_framesizes = dt3155_ioc_enum_framesizes,
719 .vidioc_enum_frameintervals = dt3155_ioc_enum_frameintervals,
724 dt3155_init_board(struct pci_dev *pdev)
726 struct dt3155_priv *pd = pci_get_drvdata(pdev);
732 pci_set_master(pdev); /* dt3155 needs it */
734 /* resetting the adapter */
735 iowrite32(FLD_CRPT_ODD | FLD_CRPT_EVEN | FLD_DN_ODD | FLD_DN_EVEN,
740 /* initializing adaper registers */
741 iowrite32(FIFO_EN | SRST, pd->regs + CSR1);
743 iowrite32(0xEEEEEE01, pd->regs + EVEN_PIXEL_FMT);
744 iowrite32(0xEEEEEE01, pd->regs + ODD_PIXEL_FMT);
745 iowrite32(0x00000020, pd->regs + FIFO_TRIGER);
746 iowrite32(0x00000103, pd->regs + XFER_MODE);
747 iowrite32(0, pd->regs + RETRY_WAIT_CNT);
748 iowrite32(0, pd->regs + INT_CSR);
749 iowrite32(1, pd->regs + EVEN_FLD_MASK);
750 iowrite32(1, pd->regs + ODD_FLD_MASK);
751 iowrite32(0, pd->regs + MASK_LENGTH);
752 iowrite32(0x0005007C, pd->regs + FIFO_FLAG_CNT);
753 iowrite32(0x01010101, pd->regs + IIC_CLK_DUR);
756 /* verifying that we have a DT3155 board (not just a SAA7116 chip) */
757 read_i2c_reg(pd->regs, DT_ID, &tmp);
758 if (tmp != DT3155_ID)
761 /* initialize AD LUT */
762 write_i2c_reg(pd->regs, AD_ADDR, 0);
763 for (i = 0; i < 256; i++)
764 write_i2c_reg(pd->regs, AD_LUT, i);
766 /* initialize ADC references */
767 /* FIXME: pos_ref & neg_ref depend on VT_50HZ */
768 write_i2c_reg(pd->regs, AD_ADDR, AD_CMD_REG);
769 write_i2c_reg(pd->regs, AD_CMD, VIDEO_CNL_1 | SYNC_CNL_1 | SYNC_LVL_3);
770 write_i2c_reg(pd->regs, AD_ADDR, AD_POS_REF);
771 write_i2c_reg(pd->regs, AD_CMD, 34);
772 write_i2c_reg(pd->regs, AD_ADDR, AD_NEG_REF);
773 write_i2c_reg(pd->regs, AD_CMD, 0);
775 /* initialize PM LUT */
776 write_i2c_reg(pd->regs, CONFIG, pd->config | PM_LUT_PGM);
777 for (i = 0; i < 256; i++) {
778 write_i2c_reg(pd->regs, PM_LUT_ADDR, i);
779 write_i2c_reg(pd->regs, PM_LUT_DATA, i);
781 write_i2c_reg(pd->regs, CONFIG, pd->config | PM_LUT_PGM | PM_LUT_SEL);
782 for (i = 0; i < 256; i++) {
783 write_i2c_reg(pd->regs, PM_LUT_ADDR, i);
784 write_i2c_reg(pd->regs, PM_LUT_DATA, i);
786 write_i2c_reg(pd->regs, CONFIG, pd->config); /* ACQ_MODE_EVEN */
788 /* select chanel 1 for input and set sync level */
789 write_i2c_reg(pd->regs, AD_ADDR, AD_CMD_REG);
790 write_i2c_reg(pd->regs, AD_CMD, VIDEO_CNL_1 | SYNC_CNL_1 | SYNC_LVL_3);
792 /* allocate memory, and initialize the DMA machine */
793 buf_cpu = dma_alloc_coherent(&pdev->dev, DT3155_BUF_SIZE, &buf_dma,
797 iowrite32(buf_dma, pd->regs + EVEN_DMA_START);
798 iowrite32(buf_dma, pd->regs + ODD_DMA_START);
799 iowrite32(0, pd->regs + EVEN_DMA_STRIDE);
800 iowrite32(0, pd->regs + ODD_DMA_STRIDE);
802 /* Perform a pseudo even field acquire */
803 iowrite32(FIFO_EN | SRST | CAP_CONT_ODD, pd->regs + CSR1);
804 write_i2c_reg(pd->regs, CSR2, pd->csr2 | SYNC_SNTL);
805 write_i2c_reg(pd->regs, CONFIG, pd->config);
806 write_i2c_reg(pd->regs, EVEN_CSR, CSR_SNGL);
807 write_i2c_reg(pd->regs, CSR2, pd->csr2 | BUSY_EVEN | SYNC_SNTL);
809 read_i2c_reg(pd->regs, CSR2, &tmp);
810 write_i2c_reg(pd->regs, EVEN_CSR, CSR_ERROR | CSR_SNGL | CSR_DONE);
811 write_i2c_reg(pd->regs, ODD_CSR, CSR_ERROR | CSR_SNGL | CSR_DONE);
812 write_i2c_reg(pd->regs, CSR2, pd->csr2);
813 iowrite32(FIFO_EN | SRST | FLD_DN_EVEN | FLD_DN_ODD, pd->regs + CSR1);
815 /* deallocate memory */
816 dma_free_coherent(&pdev->dev, DT3155_BUF_SIZE, buf_cpu, buf_dma);
822 static struct video_device dt3155_vdev = {
824 .fops = &dt3155_fops,
825 .ioctl_ops = &dt3155_ioctl_ops,
827 .release = video_device_release,
828 .tvnorms = DT3155_CURRENT_NORM,
829 .current_norm = DT3155_CURRENT_NORM,
832 /* same as in drivers/base/dma-coherent.c */
833 struct dma_coherent_mem {
835 dma_addr_t device_base;
838 unsigned long *bitmap;
842 dt3155_alloc_coherent(struct device *dev, size_t size, int flags)
844 struct dma_coherent_mem *mem;
846 int pages = size >> PAGE_SHIFT;
847 int bitmap_size = BITS_TO_LONGS(pages) * sizeof(long);
849 if ((flags & DMA_MEMORY_MAP) == 0)
856 mem = kzalloc(sizeof(*mem), GFP_KERNEL);
859 mem->virt_base = dma_alloc_coherent(dev, size, &dev_base,
862 goto err_alloc_coherent;
863 mem->bitmap = kzalloc(bitmap_size, GFP_KERNEL);
867 /* coherent_dma_mask is already set to 32 bits */
868 mem->device_base = dev_base;
872 return DMA_MEMORY_MAP;
875 dma_free_coherent(dev, size, mem->virt_base, dev_base);
883 dt3155_free_coherent(struct device *dev)
885 struct dma_coherent_mem *mem = dev->dma_mem;
890 dma_free_coherent(dev, mem->size << PAGE_SHIFT,
891 mem->virt_base, mem->device_base);
897 dt3155_probe(struct pci_dev *pdev, const struct pci_device_id *id)
900 struct dt3155_priv *pd;
902 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
905 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
908 pd = kzalloc(sizeof(*pd), GFP_KERNEL);
911 pd->vdev = video_device_alloc();
913 goto err_video_device_alloc;
914 *pd->vdev = dt3155_vdev;
915 pci_set_drvdata(pdev, pd); /* for use in dt3155_remove() */
916 video_set_drvdata(pd->vdev, pd); /* for use in video_fops */
919 INIT_LIST_HEAD(&pd->dmaq);
920 mutex_init(&pd->mux);
921 pd->vdev->lock = &pd->mux; /* for locking v4l2_file_operations */
922 spin_lock_init(&pd->lock);
923 pd->csr2 = csr2_init;
924 pd->config = config_init;
925 err = pci_enable_device(pdev);
928 err = pci_request_region(pdev, 0, pci_name(pdev));
931 pd->regs = pci_iomap(pdev, 0, pci_resource_len(pd->pdev, 0));
936 err = dt3155_init_board(pdev);
939 err = video_register_device(pd->vdev, VFL_TYPE_GRABBER, -1);
942 if (dt3155_alloc_coherent(&pdev->dev, DT3155_CHUNK_SIZE,
944 dev_info(&pdev->dev, "preallocated 8 buffers\n");
945 dev_info(&pdev->dev, "/dev/video%i is ready\n", pd->vdev->minor);
946 return 0; /* success */
949 pci_iounmap(pdev, pd->regs);
951 pci_release_region(pdev, 0);
953 pci_disable_device(pdev);
955 video_device_release(pd->vdev);
956 err_video_device_alloc:
962 dt3155_remove(struct pci_dev *pdev)
964 struct dt3155_priv *pd = pci_get_drvdata(pdev);
966 dt3155_free_coherent(&pdev->dev);
967 video_unregister_device(pd->vdev);
968 pci_iounmap(pdev, pd->regs);
969 pci_release_region(pdev, 0);
970 pci_disable_device(pdev);
972 * video_device_release() is invoked automatically
973 * see: struct video_device dt3155_vdev
978 static DEFINE_PCI_DEVICE_TABLE(pci_ids) = {
979 { PCI_DEVICE(DT3155_VENDOR_ID, DT3155_DEVICE_ID) },
980 { 0, /* zero marks the end */ },
982 MODULE_DEVICE_TABLE(pci, pci_ids);
984 static struct pci_driver pci_driver = {
987 .probe = dt3155_probe,
988 .remove = dt3155_remove,
991 module_pci_driver(pci_driver);
993 MODULE_DESCRIPTION("video4linux pci-driver for dt3155 frame grabber");
994 MODULE_AUTHOR("Marin Mitov <mitov@issp.bas.bg>");
995 MODULE_VERSION(DT3155_VERSION);
996 MODULE_LICENSE("GPL");