Version:  2.0.40 2.2.26 2.4.37 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19

Linux/drivers/staging/media/dt3155v4l/dt3155v4l.c

  1 /***************************************************************************
  2  *   Copyright (C) 2006-2010 by Marin Mitov                                *
  3  *   mitov@issp.bas.bg                                                     *
  4  *                                                                         *
  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.                                   *
  9  *                                                                         *
 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.                          *
 14  *                                                                         *
 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  ***************************************************************************/
 20 
 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/v4l2-common.h>
 30 #include <media/videobuf2-dma-contig.h>
 31 
 32 #include "dt3155v4l.h"
 33 
 34 #define DT3155_DEVICE_ID 0x1223
 35 
 36 /* DT3155_CHUNK_SIZE is 4M (2^22) 8 full size buffers */
 37 #define DT3155_CHUNK_SIZE (1U << 22)
 38 
 39 #define DT3155_COH_FLAGS (GFP_KERNEL | GFP_DMA32 | __GFP_COLD | __GFP_NOWARN)
 40 
 41 #define DT3155_BUF_SIZE (768 * 576)
 42 
 43 #ifdef CONFIG_DT3155_STREAMING
 44 #define DT3155_CAPTURE_METHOD V4L2_CAP_STREAMING
 45 #else
 46 #define DT3155_CAPTURE_METHOD V4L2_CAP_READWRITE
 47 #endif
 48 
 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[] = {
 57         {
 58         .index = 0,
 59         .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
 60         .flags = 0,
 61         .description = "CCIR/50Hz 8 bits gray",
 62         .pixelformat = V4L2_PIX_FMT_GREY,
 63         },
 64 };
 65 #else
 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[] = {
 72         {
 73         .index = 0,
 74         .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
 75         .flags = 0,
 76         .description = "RS-170/60Hz 8 bits gray",
 77         .pixelformat = V4L2_PIX_FMT_GREY,
 78         },
 79 };
 80 #endif
 81 
 82 #define NUM_OF_FORMATS ARRAY_SIZE(frame_std)
 83 
 84 static u8 config_init = ACQ_MODE_EVEN;
 85 
 86 /**
 87  * read_i2c_reg - reads an internal i2c register
 88  *
 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
 92  *
 93  * returns:     zero on success or error code
 94  *
 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.
 98  */
 99 static int
100 read_i2c_reg(void __iomem *addr, u8 index, u8 *data)
101 {
102         u32 tmp = index;
103 
104         iowrite32((tmp<<17) | IIC_READ, addr + IIC_CSR2);
105         mmiowb();
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 */
114         }
115         *data = tmp>>24;
116         return 0;
117 }
118 
119 /**
120  * write_i2c_reg - writes to an internal i2c register
121  *
122  * @addr:       dt3155 mmio base address
123  * @index:      index (internal address) of register to read
124  * @data:       data to be written
125  *
126  * returns:     zero on success or error code
127  *
128  * This function starts writting the specified (by index) register
129  * and busy waits for the process to finish.
130  */
131 static int
132 write_i2c_reg(void __iomem *addr, u8 index, u8 data)
133 {
134         u32 tmp = index;
135 
136         iowrite32((tmp<<17) | IIC_WRITE | data, addr + IIC_CSR2);
137         mmiowb();
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 */
145         }
146         return 0;
147 }
148 
149 /**
150  * write_i2c_reg_nowait - writes to an internal i2c register
151  *
152  * @addr:       dt3155 mmio base address
153  * @index:      index (internal address) of register to read
154  * @data:       data to be written
155  *
156  * This function starts writting the specified (by index) register
157  * and then returns.
158  */
159 static void write_i2c_reg_nowait(void __iomem *addr, u8 index, u8 data)
160 {
161         u32 tmp = index;
162 
163         iowrite32((tmp<<17) | IIC_WRITE | data, addr + IIC_CSR2);
164         mmiowb();
165 }
166 
167 /**
168  * wait_i2c_reg - waits the read/write to finish
169  *
170  * @addr:       dt3155 mmio base address
171  *
172  * returns:     zero on success or error code
173  *
174  * This function waits reading/writting to finish.
175  */
176 static int wait_i2c_reg(void __iomem *addr)
177 {
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 */
186         }
187         return 0;
188 }
189 
190 static int
191 dt3155_start_acq(struct dt3155_priv *pd)
192 {
193         struct vb2_buffer *vb = pd->curr_buf;
194         dma_addr_t dma_addr;
195 
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,
206                                                         pd->regs + CSR1);
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);
211 
212         /*  start the board  */
213         write_i2c_reg(pd->regs, CSR2, pd->csr2 | BUSY_EVEN | BUSY_ODD);
214         return 0; /* success  */
215 }
216 
217 /*
218  *      driver-specific callbacks (vb2_ops)
219  */
220 static int
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[])
224 
225 {
226         struct dt3155_priv *pd = vb2_get_drv_priv(q);
227         void *ret;
228 
229         if (*num_buffers == 0)
230                 *num_buffers = 1;
231         *num_planes = 1;
232         sizes[0] = img_width * img_height;
233         if (pd->q->alloc_ctx[0])
234                 return 0;
235         ret = vb2_dma_contig_init_ctx(&pd->pdev->dev);
236         if (IS_ERR(ret))
237                 return PTR_ERR(ret);
238         pd->q->alloc_ctx[0] = ret;
239         return 0;
240 }
241 
242 static void
243 dt3155_wait_prepare(struct vb2_queue *q)
244 {
245         struct dt3155_priv *pd = vb2_get_drv_priv(q);
246 
247         mutex_unlock(pd->vdev->lock);
248 }
249 
250 static void
251 dt3155_wait_finish(struct vb2_queue *q)
252 {
253         struct dt3155_priv *pd = vb2_get_drv_priv(q);
254 
255         mutex_lock(pd->vdev->lock);
256 }
257 
258 static int
259 dt3155_buf_prepare(struct vb2_buffer *vb)
260 {
261         vb2_set_plane_payload(vb, 0, img_width * img_height);
262         return 0;
263 }
264 
265 static void
266 dt3155_stop_streaming(struct vb2_queue *q)
267 {
268         struct dt3155_priv *pd = vb2_get_drv_priv(q);
269         struct vb2_buffer *vb;
270 
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);
276         }
277         spin_unlock_irq(&pd->lock);
278         msleep(45); /* irq hendler will stop the hardware */
279 }
280 
281 static void
282 dt3155_buf_queue(struct vb2_buffer *vb)
283 {
284         struct dt3155_priv *pd = vb2_get_drv_priv(vb->vb2_queue);
285 
286         /*  pd->q->streaming = 1 when dt3155_buf_queue() is invoked  */
287         spin_lock_irq(&pd->lock);
288         if (pd->curr_buf)
289                 list_add_tail(&vb->done_entry, &pd->dmaq);
290         else {
291                 pd->curr_buf = vb;
292                 dt3155_start_acq(pd);
293         }
294         spin_unlock_irq(&pd->lock);
295 }
296 /*
297  *      end driver-specific callbacks
298  */
299 
300 static const struct vb2_ops q_ops = {
301         .queue_setup = dt3155_queue_setup,
302         .wait_prepare = dt3155_wait_prepare,
303         .wait_finish = dt3155_wait_finish,
304         .buf_prepare = dt3155_buf_prepare,
305         .stop_streaming = dt3155_stop_streaming,
306         .buf_queue = dt3155_buf_queue,
307 };
308 
309 static irqreturn_t
310 dt3155_irq_handler_even(int irq, void *dev_id)
311 {
312         struct dt3155_priv *ipd = dev_id;
313         struct vb2_buffer *ivb;
314         dma_addr_t dma_addr;
315         u32 tmp;
316 
317         tmp = ioread32(ipd->regs + INT_CSR) & (FLD_START | FLD_END_ODD);
318         if (!tmp)
319                 return IRQ_NONE;  /* not our irq */
320         if ((tmp & FLD_START) && !(tmp & FLD_END_ODD)) {
321                 iowrite32(FLD_START_EN | FLD_END_ODD_EN | FLD_START,
322                                                         ipd->regs + INT_CSR);
323                 ipd->field_count++;
324                 return IRQ_HANDLED; /* start of field irq */
325         }
326         if ((tmp & FLD_START) && (tmp & FLD_END_ODD))
327                 ipd->stats.start_before_end++;
328         /*      check for corrupted fields     */
329 /*      write_i2c_reg(ipd->regs, EVEN_CSR, CSR_ERROR | CSR_DONE);       */
330 /*      write_i2c_reg(ipd->regs, ODD_CSR, CSR_ERROR | CSR_DONE);        */
331         tmp = ioread32(ipd->regs + CSR1) & (FLD_CRPT_EVEN | FLD_CRPT_ODD);
332         if (tmp) {
333                 ipd->stats.corrupted_fields++;
334                 iowrite32(FIFO_EN | SRST | FLD_CRPT_ODD | FLD_CRPT_EVEN |
335                                                 FLD_DN_ODD | FLD_DN_EVEN |
336                                                 CAP_CONT_EVEN | CAP_CONT_ODD,
337                                                         ipd->regs + CSR1);
338                 mmiowb();
339         }
340 
341         spin_lock(&ipd->lock);
342         if (ipd->curr_buf) {
343                 v4l2_get_timestamp(&ipd->curr_buf->v4l2_buf.timestamp);
344                 ipd->curr_buf->v4l2_buf.sequence = (ipd->field_count) >> 1;
345                 vb2_buffer_done(ipd->curr_buf, VB2_BUF_STATE_DONE);
346         }
347 
348         if (!ipd->q->streaming || list_empty(&ipd->dmaq))
349                 goto stop_dma;
350         ivb = list_first_entry(&ipd->dmaq, typeof(*ivb), done_entry);
351         list_del(&ivb->done_entry);
352         ipd->curr_buf = ivb;
353         dma_addr = vb2_dma_contig_plane_dma_addr(ivb, 0);
354         iowrite32(dma_addr, ipd->regs + EVEN_DMA_START);
355         iowrite32(dma_addr + img_width, ipd->regs + ODD_DMA_START);
356         iowrite32(img_width, ipd->regs + EVEN_DMA_STRIDE);
357         iowrite32(img_width, ipd->regs + ODD_DMA_STRIDE);
358         mmiowb();
359         /* enable interrupts, clear all irq flags */
360         iowrite32(FLD_START_EN | FLD_END_ODD_EN | FLD_START |
361                         FLD_END_EVEN | FLD_END_ODD, ipd->regs + INT_CSR);
362         spin_unlock(&ipd->lock);
363         return IRQ_HANDLED;
364 
365 stop_dma:
366         ipd->curr_buf = NULL;
367         /* stop the board */
368         write_i2c_reg_nowait(ipd->regs, CSR2, ipd->csr2);
369         iowrite32(FIFO_EN | SRST | FLD_CRPT_ODD | FLD_CRPT_EVEN |
370                   FLD_DN_ODD | FLD_DN_EVEN, ipd->regs + CSR1);
371         /* disable interrupts, clear all irq flags */
372         iowrite32(FLD_START | FLD_END_EVEN | FLD_END_ODD, ipd->regs + INT_CSR);
373         spin_unlock(&ipd->lock);
374         return IRQ_HANDLED;
375 }
376 
377 static int
378 dt3155_open(struct file *filp)
379 {
380         int ret = 0;
381         struct dt3155_priv *pd = video_drvdata(filp);
382 
383         if (mutex_lock_interruptible(&pd->mux))
384                 return -ERESTARTSYS;
385         if (!pd->users) {
386                 pd->q = kzalloc(sizeof(*pd->q), GFP_KERNEL);
387                 if (!pd->q) {
388                         ret = -ENOMEM;
389                         goto err_alloc_queue;
390                 }
391                 pd->q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
392                 pd->q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
393                 pd->q->io_modes = VB2_READ | VB2_MMAP;
394                 pd->q->ops = &q_ops;
395                 pd->q->mem_ops = &vb2_dma_contig_memops;
396                 pd->q->drv_priv = pd;
397                 pd->curr_buf = NULL;
398                 pd->field_count = 0;
399                 ret = vb2_queue_init(pd->q);
400                 if (ret < 0)
401                         goto err_request_irq;
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,
406                                                 pd->regs + INT_CSR);
407                 ret = request_irq(pd->pdev->irq, dt3155_irq_handler_even,
408                                                 IRQF_SHARED, DT3155_NAME, pd);
409                 if (ret)
410                         goto err_request_irq;
411         }
412         pd->users++;
413         mutex_unlock(&pd->mux);
414         return 0; /* success */
415 err_request_irq:
416         kfree(pd->q);
417         pd->q = NULL;
418 err_alloc_queue:
419         mutex_unlock(&pd->mux);
420         return ret;
421 }
422 
423 static int
424 dt3155_release(struct file *filp)
425 {
426         struct dt3155_priv *pd = video_drvdata(filp);
427 
428         mutex_lock(&pd->mux);
429         pd->users--;
430         BUG_ON(pd->users < 0);
431         if (!pd->users) {
432                 vb2_queue_release(pd->q);
433                 free_irq(pd->pdev->irq, pd);
434                 if (pd->q->alloc_ctx[0])
435                         vb2_dma_contig_cleanup_ctx(pd->q->alloc_ctx[0]);
436                 kfree(pd->q);
437                 pd->q = NULL;
438         }
439         mutex_unlock(&pd->mux);
440         return 0;
441 }
442 
443 static ssize_t
444 dt3155_read(struct file *filp, char __user *user, size_t size, loff_t *loff)
445 {
446         struct dt3155_priv *pd = video_drvdata(filp);
447         ssize_t res;
448 
449         if (mutex_lock_interruptible(&pd->mux))
450                 return -ERESTARTSYS;
451         res = vb2_read(pd->q, user, size, loff, filp->f_flags & O_NONBLOCK);
452         mutex_unlock(&pd->mux);
453         return res;
454 }
455 
456 static unsigned int
457 dt3155_poll(struct file *filp, struct poll_table_struct *polltbl)
458 {
459         struct dt3155_priv *pd = video_drvdata(filp);
460         unsigned int res;
461 
462         mutex_lock(&pd->mux);
463         res = vb2_poll(pd->q, filp, polltbl);
464         mutex_unlock(&pd->mux);
465         return res;
466 }
467 
468 static int
469 dt3155_mmap(struct file *filp, struct vm_area_struct *vma)
470 {
471         struct dt3155_priv *pd = video_drvdata(filp);
472         int res;
473 
474         if (mutex_lock_interruptible(&pd->mux))
475                 return -ERESTARTSYS;
476         res = vb2_mmap(pd->q, vma);
477         mutex_unlock(&pd->mux);
478         return res;
479 }
480 
481 static const struct v4l2_file_operations dt3155_fops = {
482         .owner = THIS_MODULE,
483         .open = dt3155_open,
484         .release = dt3155_release,
485         .read = dt3155_read,
486         .poll = dt3155_poll,
487         .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */
488         .mmap = dt3155_mmap,
489 };
490 
491 static int
492 dt3155_ioc_streamon(struct file *filp, void *p, enum v4l2_buf_type type)
493 {
494         struct dt3155_priv *pd = video_drvdata(filp);
495 
496         return vb2_streamon(pd->q, type);
497 }
498 
499 static int
500 dt3155_ioc_streamoff(struct file *filp, void *p, enum v4l2_buf_type type)
501 {
502         struct dt3155_priv *pd = video_drvdata(filp);
503 
504         return vb2_streamoff(pd->q, type);
505 }
506 
507 static int
508 dt3155_ioc_querycap(struct file *filp, void *p, struct v4l2_capability *cap)
509 {
510         struct dt3155_priv *pd = video_drvdata(filp);
511 
512         strcpy(cap->driver, DT3155_NAME);
513         strcpy(cap->card, DT3155_NAME " frame grabber");
514         sprintf(cap->bus_info, "PCI:%s", pci_name(pd->pdev));
515         cap->device_caps = V4L2_CAP_VIDEO_CAPTURE |
516                                 DT3155_CAPTURE_METHOD;
517         cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
518         return 0;
519 }
520 
521 static int
522 dt3155_ioc_enum_fmt_vid_cap(struct file *filp, void *p, struct v4l2_fmtdesc *f)
523 {
524         if (f->index >= NUM_OF_FORMATS)
525                 return -EINVAL;
526         *f = frame_std[f->index];
527         return 0;
528 }
529 
530 static int
531 dt3155_ioc_g_fmt_vid_cap(struct file *filp, void *p, struct v4l2_format *f)
532 {
533         if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
534                 return -EINVAL;
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;
542         f->fmt.pix.priv = 0;
543         return 0;
544 }
545 
546 static int
547 dt3155_ioc_try_fmt_vid_cap(struct file *filp, void *p, struct v4l2_format *f)
548 {
549         if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
550                 return -EINVAL;
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)
557                         return 0;
558         else
559                 return -EINVAL;
560 }
561 
562 static int
563 dt3155_ioc_s_fmt_vid_cap(struct file *filp, void *p, struct v4l2_format *f)
564 {
565         return dt3155_ioc_g_fmt_vid_cap(filp, p, f);
566 }
567 
568 static int
569 dt3155_ioc_reqbufs(struct file *filp, void *p, struct v4l2_requestbuffers *b)
570 {
571         struct dt3155_priv *pd = video_drvdata(filp);
572 
573         return vb2_reqbufs(pd->q, b);
574 }
575 
576 static int
577 dt3155_ioc_querybuf(struct file *filp, void *p, struct v4l2_buffer *b)
578 {
579         struct dt3155_priv *pd = video_drvdata(filp);
580 
581         return vb2_querybuf(pd->q, b);
582 }
583 
584 static int
585 dt3155_ioc_qbuf(struct file *filp, void *p, struct v4l2_buffer *b)
586 {
587         struct dt3155_priv *pd = video_drvdata(filp);
588 
589         return vb2_qbuf(pd->q, b);
590 }
591 
592 static int
593 dt3155_ioc_dqbuf(struct file *filp, void *p, struct v4l2_buffer *b)
594 {
595         struct dt3155_priv *pd = video_drvdata(filp);
596 
597         return vb2_dqbuf(pd->q, b, filp->f_flags & O_NONBLOCK);
598 }
599 
600 static int
601 dt3155_ioc_querystd(struct file *filp, void *p, v4l2_std_id *norm)
602 {
603         *norm = DT3155_CURRENT_NORM;
604         return 0;
605 }
606 
607 static int
608 dt3155_ioc_g_std(struct file *filp, void *p, v4l2_std_id *norm)
609 {
610         *norm = DT3155_CURRENT_NORM;
611         return 0;
612 }
613 
614 static int
615 dt3155_ioc_s_std(struct file *filp, void *p, v4l2_std_id norm)
616 {
617         if (norm & DT3155_CURRENT_NORM)
618                 return 0;
619         return -EINVAL;
620 }
621 
622 static int
623 dt3155_ioc_enum_input(struct file *filp, void *p, struct v4l2_input *input)
624 {
625         if (input->index)
626                 return -EINVAL;
627         strcpy(input->name, "Coax in");
628         input->type = V4L2_INPUT_TYPE_CAMERA;
629         /*
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
633          */
634         input->std = DT3155_CURRENT_NORM;
635         input->status = 0;/* FIXME: add sync detection & V4L2_IN_ST_NO_H_LOCK */
636         return 0;
637 }
638 
639 static int
640 dt3155_ioc_g_input(struct file *filp, void *p, unsigned int *i)
641 {
642         *i = 0;
643         return 0;
644 }
645 
646 static int
647 dt3155_ioc_s_input(struct file *filp, void *p, unsigned int i)
648 {
649         if (i)
650                 return -EINVAL;
651         return 0;
652 }
653 
654 static int
655 dt3155_ioc_g_parm(struct file *filp, void *p, struct v4l2_streamparm *parms)
656 {
657         if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
658                 return -EINVAL;
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? */
665         return 0;
666 }
667 
668 static int
669 dt3155_ioc_s_parm(struct file *filp, void *p, struct v4l2_streamparm *parms)
670 {
671         if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
672                 return -EINVAL;
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? */
679         return 0;
680 }
681 
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,
686 /*
687         .vidioc_g_priority = dt3155_ioc_g_priority,
688         .vidioc_s_priority = dt3155_ioc_s_priority,
689 */
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,
704 /*
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,
711 */
712         .vidioc_g_parm = dt3155_ioc_g_parm,
713         .vidioc_s_parm = dt3155_ioc_s_parm,
714 /*
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,
720 */
721 };
722 
723 static int
724 dt3155_init_board(struct pci_dev *pdev)
725 {
726         struct dt3155_priv *pd = pci_get_drvdata(pdev);
727         void *buf_cpu;
728         dma_addr_t buf_dma;
729         int i;
730         u8 tmp;
731 
732         pci_set_master(pdev); /* dt3155 needs it */
733 
734         /*  resetting the adapter  */
735         iowrite32(FLD_CRPT_ODD | FLD_CRPT_EVEN | FLD_DN_ODD | FLD_DN_EVEN,
736                                                         pd->regs + CSR1);
737         mmiowb();
738         msleep(20);
739 
740         /*  initializing adaper registers  */
741         iowrite32(FIFO_EN | SRST, pd->regs + CSR1);
742         mmiowb();
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);
754         mmiowb();
755 
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)
759                 return -ENODEV;
760 
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);
765 
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);
774 
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);
780         }
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);
785         }
786         write_i2c_reg(pd->regs, CONFIG, pd->config); /*  ACQ_MODE_EVEN  */
787 
788         /* select channel 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);
791 
792         /* allocate memory, and initialize the DMA machine */
793         buf_cpu = dma_alloc_coherent(&pdev->dev, DT3155_BUF_SIZE, &buf_dma,
794                                                                 GFP_KERNEL);
795         if (!buf_cpu)
796                 return -ENOMEM;
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);
801 
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);
808         msleep(100);
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);
814 
815         /*  deallocate memory  */
816         dma_free_coherent(&pdev->dev, DT3155_BUF_SIZE, buf_cpu, buf_dma);
817         if (tmp & BUSY_EVEN)
818                 return -EIO;
819         return 0;
820 }
821 
822 static struct video_device dt3155_vdev = {
823         .name = DT3155_NAME,
824         .fops = &dt3155_fops,
825         .ioctl_ops = &dt3155_ioctl_ops,
826         .minor = -1,
827         .release = video_device_release,
828         .tvnorms = DT3155_CURRENT_NORM,
829 };
830 
831 /* same as in drivers/base/dma-coherent.c */
832 struct dma_coherent_mem {
833         void            *virt_base;
834         dma_addr_t      device_base;
835         int             size;
836         int             flags;
837         unsigned long   *bitmap;
838 };
839 
840 static int
841 dt3155_alloc_coherent(struct device *dev, size_t size, int flags)
842 {
843         struct dma_coherent_mem *mem;
844         dma_addr_t dev_base;
845         int pages = size >> PAGE_SHIFT;
846         int bitmap_size = BITS_TO_LONGS(pages) * sizeof(long);
847 
848         if ((flags & DMA_MEMORY_MAP) == 0)
849                 goto out;
850         if (!size)
851                 goto out;
852         if (dev->dma_mem)
853                 goto out;
854 
855         mem = kzalloc(sizeof(*mem), GFP_KERNEL);
856         if (!mem)
857                 goto out;
858         mem->virt_base = dma_alloc_coherent(dev, size, &dev_base,
859                                                         DT3155_COH_FLAGS);
860         if (!mem->virt_base)
861                 goto err_alloc_coherent;
862         mem->bitmap = kzalloc(bitmap_size, GFP_KERNEL);
863         if (!mem->bitmap)
864                 goto err_bitmap;
865 
866         /* coherent_dma_mask is already set to 32 bits */
867         mem->device_base = dev_base;
868         mem->size = pages;
869         mem->flags = flags;
870         dev->dma_mem = mem;
871         return DMA_MEMORY_MAP;
872 
873 err_bitmap:
874         dma_free_coherent(dev, size, mem->virt_base, dev_base);
875 err_alloc_coherent:
876         kfree(mem);
877 out:
878         return 0;
879 }
880 
881 static void
882 dt3155_free_coherent(struct device *dev)
883 {
884         struct dma_coherent_mem *mem = dev->dma_mem;
885 
886         if (!mem)
887                 return;
888         dev->dma_mem = NULL;
889         dma_free_coherent(dev, mem->size << PAGE_SHIFT,
890                                         mem->virt_base, mem->device_base);
891         kfree(mem->bitmap);
892         kfree(mem);
893 }
894 
895 static int
896 dt3155_probe(struct pci_dev *pdev, const struct pci_device_id *id)
897 {
898         int err;
899         struct dt3155_priv *pd;
900 
901         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
902         if (err)
903                 return -ENODEV;
904         pd = kzalloc(sizeof(*pd), GFP_KERNEL);
905         if (!pd)
906                 return -ENOMEM;
907         pd->vdev = video_device_alloc();
908         if (!pd->vdev) {
909                 err = -ENOMEM;
910                 goto err_video_device_alloc;
911         }
912         *pd->vdev = dt3155_vdev;
913         pci_set_drvdata(pdev, pd);    /* for use in dt3155_remove() */
914         video_set_drvdata(pd->vdev, pd);  /* for use in video_fops */
915         pd->users = 0;
916         pd->pdev = pdev;
917         INIT_LIST_HEAD(&pd->dmaq);
918         mutex_init(&pd->mux);
919         pd->vdev->lock = &pd->mux; /* for locking v4l2_file_operations */
920         spin_lock_init(&pd->lock);
921         pd->csr2 = csr2_init;
922         pd->config = config_init;
923         err = pci_enable_device(pdev);
924         if (err)
925                 goto err_enable_dev;
926         err = pci_request_region(pdev, 0, pci_name(pdev));
927         if (err)
928                 goto err_req_region;
929         pd->regs = pci_iomap(pdev, 0, pci_resource_len(pd->pdev, 0));
930         if (!pd->regs) {
931                 err = -ENOMEM;
932                 goto err_pci_iomap;
933         }
934         err = dt3155_init_board(pdev);
935         if (err)
936                 goto err_init_board;
937         err = video_register_device(pd->vdev, VFL_TYPE_GRABBER, -1);
938         if (err)
939                 goto err_init_board;
940         if (dt3155_alloc_coherent(&pdev->dev, DT3155_CHUNK_SIZE,
941                                                         DMA_MEMORY_MAP))
942                 dev_info(&pdev->dev, "preallocated 8 buffers\n");
943         dev_info(&pdev->dev, "/dev/video%i is ready\n", pd->vdev->minor);
944         return 0;  /*   success   */
945 
946 err_init_board:
947         pci_iounmap(pdev, pd->regs);
948 err_pci_iomap:
949         pci_release_region(pdev, 0);
950 err_req_region:
951         pci_disable_device(pdev);
952 err_enable_dev:
953         video_device_release(pd->vdev);
954 err_video_device_alloc:
955         kfree(pd);
956         return err;
957 }
958 
959 static void
960 dt3155_remove(struct pci_dev *pdev)
961 {
962         struct dt3155_priv *pd = pci_get_drvdata(pdev);
963 
964         dt3155_free_coherent(&pdev->dev);
965         video_unregister_device(pd->vdev);
966         pci_iounmap(pdev, pd->regs);
967         pci_release_region(pdev, 0);
968         pci_disable_device(pdev);
969         /*
970          * video_device_release() is invoked automatically
971          * see: struct video_device dt3155_vdev
972          */
973         kfree(pd);
974 }
975 
976 static const struct pci_device_id pci_ids[] = {
977         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, DT3155_DEVICE_ID) },
978         { 0, /* zero marks the end */ },
979 };
980 MODULE_DEVICE_TABLE(pci, pci_ids);
981 
982 static struct pci_driver pci_driver = {
983         .name = DT3155_NAME,
984         .id_table = pci_ids,
985         .probe = dt3155_probe,
986         .remove = dt3155_remove,
987 };
988 
989 module_pci_driver(pci_driver);
990 
991 MODULE_DESCRIPTION("video4linux pci-driver for dt3155 frame grabber");
992 MODULE_AUTHOR("Marin Mitov <mitov@issp.bas.bg>");
993 MODULE_VERSION(DT3155_VERSION);
994 MODULE_LICENSE("GPL");
995 

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