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[media] dt3155v4l: vb2_queue_init() can now fail. Check is required
[deliverable/linux.git] / drivers / staging / media / dt3155v4l / dt3155v4l.c
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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/videobuf2-dma-contig.h>
30
31#include "dt3155v4l.h"
32
33#define DT3155_VENDOR_ID 0x8086
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
51static const u8 csr2_init = VT_50HZ;
52#define DT3155_CURRENT_NORM V4L2_STD_625_50
53static const unsigned int img_width = 768;
54static const unsigned int img_height = 576;
55static const unsigned int frames_per_sec = 25;
56static 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
66static const u8 csr2_init = VT_60HZ;
67#define DT3155_CURRENT_NORM V4L2_STD_525_60
68static const unsigned int img_width = 640;
69static const unsigned int img_height = 480;
70static const unsigned int frames_per_sec = 30;
71static 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
84static 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 */
99static int
100read_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 */
131static int
132write_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 */
159static 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 */
176static 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
190static int
191dt3155_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 */
220static int
221dt3155_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
242static void
243dt3155_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
250static void
251dt3155_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
258static int
259dt3155_buf_prepare(struct vb2_buffer *vb)
260{
261 vb2_set_plane_payload(vb, 0, img_width * img_height);
262 return 0;
263}
264
265static int
266dt3155_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 return 0;
280}
281
282static void
283dt3155_buf_queue(struct vb2_buffer *vb)
284{
285 struct dt3155_priv *pd = vb2_get_drv_priv(vb->vb2_queue);
286
287 /* pd->q->streaming = 1 when dt3155_buf_queue() is invoked */
288 spin_lock_irq(&pd->lock);
289 if (pd->curr_buf)
290 list_add_tail(&vb->done_entry, &pd->dmaq);
291 else {
292 pd->curr_buf = vb;
293 dt3155_start_acq(pd);
294 }
295 spin_unlock_irq(&pd->lock);
296}
297/*
298 * end driver-specific callbacks
299 */
300
301const 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,
308};
309
310static irqreturn_t
311dt3155_irq_handler_even(int irq, void *dev_id)
312{
313 struct dt3155_priv *ipd = dev_id;
314 struct vb2_buffer *ivb;
315 dma_addr_t dma_addr;
316 u32 tmp;
317
318 tmp = ioread32(ipd->regs + INT_CSR) & (FLD_START | FLD_END_ODD);
319 if (!tmp)
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);
324 ipd->field_count++;
325 return IRQ_HANDLED; /* start of field irq */
326 }
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);
333 if (tmp) {
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,
338 ipd->regs + CSR1);
339 mmiowb();
340 }
341
342 spin_lock(&ipd->lock);
343 if (ipd->curr_buf) {
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);
347 }
348
349 if (!ipd->q->streaming || list_empty(&ipd->dmaq))
350 goto stop_dma;
351 ivb = list_first_entry(&ipd->dmaq, typeof(*ivb), done_entry);
352 list_del(&ivb->done_entry);
353 ipd->curr_buf = ivb;
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);
359 mmiowb();
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);
364 return IRQ_HANDLED;
365
366stop_dma:
367 ipd->curr_buf = NULL;
368 /* stop the board */
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);
375 return IRQ_HANDLED;
376}
377
378static int
379dt3155_open(struct file *filp)
380{
381 int ret = 0;
382 struct dt3155_priv *pd = video_drvdata(filp);
383
384 if (mutex_lock_interruptible(&pd->mux))
385 return -ERESTARTSYS;
386 if (!pd->users) {
387 pd->q = kzalloc(sizeof(*pd->q), GFP_KERNEL);
388 if (!pd->q) {
389 ret = -ENOMEM;
390 goto err_alloc_queue;
391 }
392 pd->q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
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 return ret;
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 return 0; /* success */
414err_request_irq:
415 kfree(pd->q);
416 pd->q = NULL;
417err_alloc_queue:
418 mutex_unlock(&pd->mux);
419 return ret;
420}
421
422static int
423dt3155_release(struct file *filp)
424{
425 struct dt3155_priv *pd = video_drvdata(filp);
426
427 mutex_lock(&pd->mux);
428 pd->users--;
429 BUG_ON(pd->users < 0);
430 if (!pd->users) {
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]);
435 kfree(pd->q);
436 pd->q = NULL;
437 }
438 mutex_unlock(&pd->mux);
439 return 0;
440}
441
442static ssize_t
443dt3155_read(struct file *filp, char __user *user, size_t size, loff_t *loff)
444{
445 struct dt3155_priv *pd = video_drvdata(filp);
446 ssize_t res;
447
448 if (mutex_lock_interruptible(&pd->mux))
449 return -ERESTARTSYS;
450 res = vb2_read(pd->q, user, size, loff, filp->f_flags & O_NONBLOCK);
451 mutex_unlock(&pd->mux);
452 return res;
453}
454
455static unsigned int
456dt3155_poll(struct file *filp, struct poll_table_struct *polltbl)
457{
458 struct dt3155_priv *pd = video_drvdata(filp);
459 unsigned int res;
460
461 mutex_lock(&pd->mux);
462 res = vb2_poll(pd->q, filp, polltbl);
463 mutex_unlock(&pd->mux);
464 return res;
465}
466
467static int
468dt3155_mmap(struct file *filp, struct vm_area_struct *vma)
469{
470 struct dt3155_priv *pd = video_drvdata(filp);
471 int res;
472
473 if (mutex_lock_interruptible(&pd->mux))
474 return -ERESTARTSYS;
475 res = vb2_mmap(pd->q, vma);
476 mutex_unlock(&pd->mux);
477 return res;
478}
479
480static const struct v4l2_file_operations dt3155_fops = {
481 .owner = THIS_MODULE,
482 .open = dt3155_open,
483 .release = dt3155_release,
484 .read = dt3155_read,
485 .poll = dt3155_poll,
486 .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */
487 .mmap = dt3155_mmap,
488};
489
490static int
491dt3155_ioc_streamon(struct file *filp, void *p, enum v4l2_buf_type type)
492{
493 struct dt3155_priv *pd = video_drvdata(filp);
494
495 return vb2_streamon(pd->q, type);
496}
497
498static int
499dt3155_ioc_streamoff(struct file *filp, void *p, enum v4l2_buf_type type)
500{
501 struct dt3155_priv *pd = video_drvdata(filp);
502
503 return vb2_streamoff(pd->q, type);
504}
505
506static int
507dt3155_ioc_querycap(struct file *filp, void *p, struct v4l2_capability *cap)
508{
509 struct dt3155_priv *pd = video_drvdata(filp);
510
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));
514 cap->version =
515 KERNEL_VERSION(DT3155_VER_MAJ, DT3155_VER_MIN, DT3155_VER_EXT);
516 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
517 DT3155_CAPTURE_METHOD;
518 return 0;
519}
520
521static int
522dt3155_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
530static int
531dt3155_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
546static int
547dt3155_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
562static int
563dt3155_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
568static int
569dt3155_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
576static int
577dt3155_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
584static int
585dt3155_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
592static int
593dt3155_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
600static int
601dt3155_ioc_querystd(struct file *filp, void *p, v4l2_std_id *norm)
602{
603 *norm = DT3155_CURRENT_NORM;
604 return 0;
605}
606
607static int
608dt3155_ioc_g_std(struct file *filp, void *p, v4l2_std_id *norm)
609{
610 *norm = DT3155_CURRENT_NORM;
611 return 0;
612}
613
614static int
615dt3155_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
622static int
623dt3155_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
639static int
640dt3155_ioc_g_input(struct file *filp, void *p, unsigned int *i)
641{
642 *i = 0;
643 return 0;
644}
645
646static int
647dt3155_ioc_s_input(struct file *filp, void *p, unsigned int i)
648{
649 if (i)
650 return -EINVAL;
651 return 0;
652}
653
654static int
655dt3155_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
668static int
669dt3155_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
682static 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
723static int __devinit
724dt3155_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 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);
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
822static 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 .current_norm = DT3155_CURRENT_NORM,
830};
831
832/* same as in drivers/base/dma-coherent.c */
833struct dma_coherent_mem {
834 void *virt_base;
835 dma_addr_t device_base;
836 int size;
837 int flags;
838 unsigned long *bitmap;
839};
840
841static int __devinit
842dt3155_alloc_coherent(struct device *dev, size_t size, int flags)
843{
844 struct dma_coherent_mem *mem;
845 dma_addr_t dev_base;
846 int pages = size >> PAGE_SHIFT;
847 int bitmap_size = BITS_TO_LONGS(pages) * sizeof(long);
848
849 if ((flags & DMA_MEMORY_MAP) == 0)
850 goto out;
851 if (!size)
852 goto out;
853 if (dev->dma_mem)
854 goto out;
855
856 mem = kzalloc(sizeof(*mem), GFP_KERNEL);
857 if (!mem)
858 goto out;
859 mem->virt_base = dma_alloc_coherent(dev, size, &dev_base,
860 DT3155_COH_FLAGS);
861 if (!mem->virt_base)
862 goto err_alloc_coherent;
863 mem->bitmap = kzalloc(bitmap_size, GFP_KERNEL);
864 if (!mem->bitmap)
865 goto err_bitmap;
866
867 /* coherent_dma_mask is already set to 32 bits */
868 mem->device_base = dev_base;
869 mem->size = pages;
870 mem->flags = flags;
871 dev->dma_mem = mem;
872 return DMA_MEMORY_MAP;
873
874err_bitmap:
875 dma_free_coherent(dev, size, mem->virt_base, dev_base);
876err_alloc_coherent:
877 kfree(mem);
878out:
879 return 0;
880}
881
882static void __devexit
883dt3155_free_coherent(struct device *dev)
884{
885 struct dma_coherent_mem *mem = dev->dma_mem;
886
887 if (!mem)
888 return;
889 dev->dma_mem = NULL;
890 dma_free_coherent(dev, mem->size << PAGE_SHIFT,
891 mem->virt_base, mem->device_base);
892 kfree(mem->bitmap);
893 kfree(mem);
894}
895
896static int __devinit
897dt3155_probe(struct pci_dev *pdev, const struct pci_device_id *id)
898{
899 int err;
900 struct dt3155_priv *pd;
901
902 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
903 if (err)
904 return -ENODEV;
905 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
906 if (err)
907 return -ENODEV;
908 pd = kzalloc(sizeof(*pd), GFP_KERNEL);
909 if (!pd)
910 return -ENOMEM;
911 pd->vdev = video_device_alloc();
912 if (!pd->vdev)
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 */
917 pd->users = 0;
918 pd->pdev = pdev;
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);
926 if (err)
927 goto err_enable_dev;
928 err = pci_request_region(pdev, 0, pci_name(pdev));
929 if (err)
930 goto err_req_region;
931 pd->regs = pci_iomap(pdev, 0, pci_resource_len(pd->pdev, 0));
932 if (!pd->regs) {
933 err = -ENOMEM;
934 goto err_pci_iomap;
935 }
936 err = dt3155_init_board(pdev);
937 if (err)
938 goto err_init_board;
939 err = video_register_device(pd->vdev, VFL_TYPE_GRABBER, -1);
940 if (err)
941 goto err_init_board;
942 if (dt3155_alloc_coherent(&pdev->dev, DT3155_CHUNK_SIZE,
943 DMA_MEMORY_MAP))
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 */
947
948err_init_board:
949 pci_iounmap(pdev, pd->regs);
950err_pci_iomap:
951 pci_release_region(pdev, 0);
952err_req_region:
953 pci_disable_device(pdev);
954err_enable_dev:
955 video_device_release(pd->vdev);
956err_video_device_alloc:
957 kfree(pd);
958 return err;
959}
960
961static void __devexit
962dt3155_remove(struct pci_dev *pdev)
963{
964 struct dt3155_priv *pd = pci_get_drvdata(pdev);
965
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);
971 /*
972 * video_device_release() is invoked automatically
973 * see: struct video_device dt3155_vdev
974 */
975 kfree(pd);
976}
977
978static DEFINE_PCI_DEVICE_TABLE(pci_ids) = {
979 { PCI_DEVICE(DT3155_VENDOR_ID, DT3155_DEVICE_ID) },
980 { 0, /* zero marks the end */ },
981};
982MODULE_DEVICE_TABLE(pci, pci_ids);
983
984static struct pci_driver pci_driver = {
985 .name = DT3155_NAME,
986 .id_table = pci_ids,
987 .probe = dt3155_probe,
988 .remove = __devexit_p(dt3155_remove),
989};
990
991module_pci_driver(pci_driver);
992
993MODULE_DESCRIPTION("video4linux pci-driver for dt3155 frame grabber");
994MODULE_AUTHOR("Marin Mitov <mitov@issp.bas.bg>");
995MODULE_VERSION(DT3155_VERSION);
996MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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