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
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
read_i2c_reg(void __iomem * addr,u8 index,u8 * data)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
write_i2c_reg(void __iomem * addr,u8 index,u8 data)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 */
write_i2c_reg_nowait(void __iomem * addr,u8 index,u8 data)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 */
wait_i2c_reg(void __iomem * addr)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
dt3155_start_acq(struct dt3155_priv * pd)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
dt3155_queue_setup(struct vb2_queue * q,const struct v4l2_format * fmt,unsigned int * num_buffers,unsigned int * num_planes,unsigned int sizes[],void * alloc_ctxs[])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
dt3155_wait_prepare(struct vb2_queue * q)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
dt3155_wait_finish(struct vb2_queue * q)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
dt3155_buf_prepare(struct vb2_buffer * vb)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 int
dt3155_stop_streaming(struct vb2_queue * q)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 return 0;
280 }
281
282 static void
dt3155_buf_queue(struct vb2_buffer * vb)283 dt3155_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
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,
308 };
309
310 static irqreturn_t
dt3155_irq_handler_even(int irq,void * dev_id)311 dt3155_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
366 stop_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
378 static int
dt3155_open(struct file * filp)379 dt3155_open(struct file *filp)
380 {
381 int ret = 0;
382 struct dt3155_priv *pd = video_drvdata(filp);
383
384 if (!pd->users) {
385 pd->q = kzalloc(sizeof(*pd->q), GFP_KERNEL);
386 if (!pd->q) {
387 ret = -ENOMEM;
388 goto err_alloc_queue;
389 }
390 pd->q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
391 pd->q->io_modes = VB2_READ | VB2_MMAP;
392 pd->q->ops = &q_ops;
393 pd->q->mem_ops = &vb2_dma_contig_memops;
394 pd->q->drv_priv = pd;
395 pd->curr_buf = NULL;
396 pd->field_count = 0;
397 vb2_queue_init(pd->q); /* cannot fail */
398 INIT_LIST_HEAD(&pd->dmaq);
399 spin_lock_init(&pd->lock);
400 /* disable all irqs, clear all irq flags */
401 iowrite32(FLD_START | FLD_END_EVEN | FLD_END_ODD,
402 pd->regs + INT_CSR);
403 ret = request_irq(pd->pdev->irq, dt3155_irq_handler_even,
404 IRQF_SHARED, DT3155_NAME, pd);
405 if (ret)
406 goto err_request_irq;
407 }
408 pd->users++;
409 return 0; /* success */
410 err_request_irq:
411 kfree(pd->q);
412 pd->q = NULL;
413 err_alloc_queue:
414 return ret;
415 }
416
417 static int
dt3155_release(struct file * filp)418 dt3155_release(struct file *filp)
419 {
420 struct dt3155_priv *pd = video_drvdata(filp);
421
422 pd->users--;
423 BUG_ON(pd->users < 0);
424 if (!pd->users) {
425 vb2_queue_release(pd->q);
426 free_irq(pd->pdev->irq, pd);
427 if (pd->q->alloc_ctx[0])
428 vb2_dma_contig_cleanup_ctx(pd->q->alloc_ctx[0]);
429 kfree(pd->q);
430 pd->q = NULL;
431 }
432 return 0;
433 }
434
435 static ssize_t
dt3155_read(struct file * filp,char __user * user,size_t size,loff_t * loff)436 dt3155_read(struct file *filp, char __user *user, size_t size, loff_t *loff)
437 {
438 struct dt3155_priv *pd = video_drvdata(filp);
439
440 return vb2_read(pd->q, user, size, loff, filp->f_flags & O_NONBLOCK);
441 }
442
443 static unsigned int
dt3155_poll(struct file * filp,struct poll_table_struct * polltbl)444 dt3155_poll(struct file *filp, struct poll_table_struct *polltbl)
445 {
446 struct dt3155_priv *pd = video_drvdata(filp);
447
448 return vb2_poll(pd->q, filp, polltbl);
449 }
450
451 static int
dt3155_mmap(struct file * filp,struct vm_area_struct * vma)452 dt3155_mmap(struct file *filp, struct vm_area_struct *vma)
453 {
454 struct dt3155_priv *pd = video_drvdata(filp);
455
456 return vb2_mmap(pd->q, vma);
457 }
458
459 static const struct v4l2_file_operations dt3155_fops = {
460 .owner = THIS_MODULE,
461 .open = dt3155_open,
462 .release = dt3155_release,
463 .read = dt3155_read,
464 .poll = dt3155_poll,
465 .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */
466 .mmap = dt3155_mmap,
467 };
468
469 static int
dt3155_ioc_streamon(struct file * filp,void * p,enum v4l2_buf_type type)470 dt3155_ioc_streamon(struct file *filp, void *p, enum v4l2_buf_type type)
471 {
472 struct dt3155_priv *pd = video_drvdata(filp);
473
474 return vb2_streamon(pd->q, type);
475 }
476
477 static int
dt3155_ioc_streamoff(struct file * filp,void * p,enum v4l2_buf_type type)478 dt3155_ioc_streamoff(struct file *filp, void *p, enum v4l2_buf_type type)
479 {
480 struct dt3155_priv *pd = video_drvdata(filp);
481
482 return vb2_streamoff(pd->q, type);
483 }
484
485 static int
dt3155_ioc_querycap(struct file * filp,void * p,struct v4l2_capability * cap)486 dt3155_ioc_querycap(struct file *filp, void *p, struct v4l2_capability *cap)
487 {
488 struct dt3155_priv *pd = video_drvdata(filp);
489
490 strcpy(cap->driver, DT3155_NAME);
491 strcpy(cap->card, DT3155_NAME " frame grabber");
492 sprintf(cap->bus_info, "PCI:%s", pci_name(pd->pdev));
493 cap->version =
494 KERNEL_VERSION(DT3155_VER_MAJ, DT3155_VER_MIN, DT3155_VER_EXT);
495 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE |
496 DT3155_CAPTURE_METHOD;
497 return 0;
498 }
499
500 static int
dt3155_ioc_enum_fmt_vid_cap(struct file * filp,void * p,struct v4l2_fmtdesc * f)501 dt3155_ioc_enum_fmt_vid_cap(struct file *filp, void *p, struct v4l2_fmtdesc *f)
502 {
503 if (f->index >= NUM_OF_FORMATS)
504 return -EINVAL;
505 *f = frame_std[f->index];
506 return 0;
507 }
508
509 static int
dt3155_ioc_g_fmt_vid_cap(struct file * filp,void * p,struct v4l2_format * f)510 dt3155_ioc_g_fmt_vid_cap(struct file *filp, void *p, struct v4l2_format *f)
511 {
512 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
513 return -EINVAL;
514 f->fmt.pix.width = img_width;
515 f->fmt.pix.height = img_height;
516 f->fmt.pix.pixelformat = V4L2_PIX_FMT_GREY;
517 f->fmt.pix.field = V4L2_FIELD_NONE;
518 f->fmt.pix.bytesperline = f->fmt.pix.width;
519 f->fmt.pix.sizeimage = f->fmt.pix.width * f->fmt.pix.height;
520 f->fmt.pix.colorspace = 0;
521 f->fmt.pix.priv = 0;
522 return 0;
523 }
524
525 static int
dt3155_ioc_try_fmt_vid_cap(struct file * filp,void * p,struct v4l2_format * f)526 dt3155_ioc_try_fmt_vid_cap(struct file *filp, void *p, struct v4l2_format *f)
527 {
528 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
529 return -EINVAL;
530 if (f->fmt.pix.width == img_width &&
531 f->fmt.pix.height == img_height &&
532 f->fmt.pix.pixelformat == V4L2_PIX_FMT_GREY &&
533 f->fmt.pix.field == V4L2_FIELD_NONE &&
534 f->fmt.pix.bytesperline == f->fmt.pix.width &&
535 f->fmt.pix.sizeimage == f->fmt.pix.width * f->fmt.pix.height)
536 return 0;
537 else
538 return -EINVAL;
539 }
540
541 static int
dt3155_ioc_s_fmt_vid_cap(struct file * filp,void * p,struct v4l2_format * f)542 dt3155_ioc_s_fmt_vid_cap(struct file *filp, void *p, struct v4l2_format *f)
543 {
544 return dt3155_ioc_g_fmt_vid_cap(filp, p, f);
545 }
546
547 static int
dt3155_ioc_reqbufs(struct file * filp,void * p,struct v4l2_requestbuffers * b)548 dt3155_ioc_reqbufs(struct file *filp, void *p, struct v4l2_requestbuffers *b)
549 {
550 struct dt3155_priv *pd = video_drvdata(filp);
551
552 return vb2_reqbufs(pd->q, b);
553 }
554
555 static int
dt3155_ioc_querybuf(struct file * filp,void * p,struct v4l2_buffer * b)556 dt3155_ioc_querybuf(struct file *filp, void *p, struct v4l2_buffer *b)
557 {
558 struct dt3155_priv *pd = video_drvdata(filp);
559
560 return vb2_querybuf(pd->q, b);
561 }
562
563 static int
dt3155_ioc_qbuf(struct file * filp,void * p,struct v4l2_buffer * b)564 dt3155_ioc_qbuf(struct file *filp, void *p, struct v4l2_buffer *b)
565 {
566 struct dt3155_priv *pd = video_drvdata(filp);
567
568 return vb2_qbuf(pd->q, b);
569 }
570
571 static int
dt3155_ioc_dqbuf(struct file * filp,void * p,struct v4l2_buffer * b)572 dt3155_ioc_dqbuf(struct file *filp, void *p, struct v4l2_buffer *b)
573 {
574 struct dt3155_priv *pd = video_drvdata(filp);
575
576 return vb2_dqbuf(pd->q, b, filp->f_flags & O_NONBLOCK);
577 }
578
579 static int
dt3155_ioc_querystd(struct file * filp,void * p,v4l2_std_id * norm)580 dt3155_ioc_querystd(struct file *filp, void *p, v4l2_std_id *norm)
581 {
582 *norm = DT3155_CURRENT_NORM;
583 return 0;
584 }
585
586 static int
dt3155_ioc_g_std(struct file * filp,void * p,v4l2_std_id * norm)587 dt3155_ioc_g_std(struct file *filp, void *p, v4l2_std_id *norm)
588 {
589 *norm = DT3155_CURRENT_NORM;
590 return 0;
591 }
592
593 static int
dt3155_ioc_s_std(struct file * filp,void * p,v4l2_std_id * norm)594 dt3155_ioc_s_std(struct file *filp, void *p, v4l2_std_id *norm)
595 {
596 if (*norm & DT3155_CURRENT_NORM)
597 return 0;
598 return -EINVAL;
599 }
600
601 static int
dt3155_ioc_enum_input(struct file * filp,void * p,struct v4l2_input * input)602 dt3155_ioc_enum_input(struct file *filp, void *p, struct v4l2_input *input)
603 {
604 if (input->index)
605 return -EINVAL;
606 strcpy(input->name, "Coax in");
607 input->type = V4L2_INPUT_TYPE_CAMERA;
608 /*
609 * FIXME: input->std = 0 according to v4l2 API
610 * VIDIOC_G_STD, VIDIOC_S_STD, VIDIOC_QUERYSTD and VIDIOC_ENUMSTD
611 * should return -EINVAL
612 */
613 input->std = DT3155_CURRENT_NORM;
614 input->status = 0;/* FIXME: add sync detection & V4L2_IN_ST_NO_H_LOCK */
615 return 0;
616 }
617
618 static int
dt3155_ioc_g_input(struct file * filp,void * p,unsigned int * i)619 dt3155_ioc_g_input(struct file *filp, void *p, unsigned int *i)
620 {
621 *i = 0;
622 return 0;
623 }
624
625 static int
dt3155_ioc_s_input(struct file * filp,void * p,unsigned int i)626 dt3155_ioc_s_input(struct file *filp, void *p, unsigned int i)
627 {
628 if (i)
629 return -EINVAL;
630 return 0;
631 }
632
633 static int
dt3155_ioc_g_parm(struct file * filp,void * p,struct v4l2_streamparm * parms)634 dt3155_ioc_g_parm(struct file *filp, void *p, struct v4l2_streamparm *parms)
635 {
636 if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
637 return -EINVAL;
638 parms->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
639 parms->parm.capture.capturemode = 0;
640 parms->parm.capture.timeperframe.numerator = 1001;
641 parms->parm.capture.timeperframe.denominator = frames_per_sec * 1000;
642 parms->parm.capture.extendedmode = 0;
643 parms->parm.capture.readbuffers = 1; /* FIXME: 2 buffers? */
644 return 0;
645 }
646
647 static int
dt3155_ioc_s_parm(struct file * filp,void * p,struct v4l2_streamparm * parms)648 dt3155_ioc_s_parm(struct file *filp, void *p, struct v4l2_streamparm *parms)
649 {
650 if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
651 return -EINVAL;
652 parms->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
653 parms->parm.capture.capturemode = 0;
654 parms->parm.capture.timeperframe.numerator = 1001;
655 parms->parm.capture.timeperframe.denominator = frames_per_sec * 1000;
656 parms->parm.capture.extendedmode = 0;
657 parms->parm.capture.readbuffers = 1; /* FIXME: 2 buffers? */
658 return 0;
659 }
660
661 static const struct v4l2_ioctl_ops dt3155_ioctl_ops = {
662 .vidioc_streamon = dt3155_ioc_streamon,
663 .vidioc_streamoff = dt3155_ioc_streamoff,
664 .vidioc_querycap = dt3155_ioc_querycap,
665 /*
666 .vidioc_g_priority = dt3155_ioc_g_priority,
667 .vidioc_s_priority = dt3155_ioc_s_priority,
668 */
669 .vidioc_enum_fmt_vid_cap = dt3155_ioc_enum_fmt_vid_cap,
670 .vidioc_try_fmt_vid_cap = dt3155_ioc_try_fmt_vid_cap,
671 .vidioc_g_fmt_vid_cap = dt3155_ioc_g_fmt_vid_cap,
672 .vidioc_s_fmt_vid_cap = dt3155_ioc_s_fmt_vid_cap,
673 .vidioc_reqbufs = dt3155_ioc_reqbufs,
674 .vidioc_querybuf = dt3155_ioc_querybuf,
675 .vidioc_qbuf = dt3155_ioc_qbuf,
676 .vidioc_dqbuf = dt3155_ioc_dqbuf,
677 .vidioc_querystd = dt3155_ioc_querystd,
678 .vidioc_g_std = dt3155_ioc_g_std,
679 .vidioc_s_std = dt3155_ioc_s_std,
680 .vidioc_enum_input = dt3155_ioc_enum_input,
681 .vidioc_g_input = dt3155_ioc_g_input,
682 .vidioc_s_input = dt3155_ioc_s_input,
683 /*
684 .vidioc_queryctrl = dt3155_ioc_queryctrl,
685 .vidioc_g_ctrl = dt3155_ioc_g_ctrl,
686 .vidioc_s_ctrl = dt3155_ioc_s_ctrl,
687 .vidioc_querymenu = dt3155_ioc_querymenu,
688 .vidioc_g_ext_ctrls = dt3155_ioc_g_ext_ctrls,
689 .vidioc_s_ext_ctrls = dt3155_ioc_s_ext_ctrls,
690 */
691 .vidioc_g_parm = dt3155_ioc_g_parm,
692 .vidioc_s_parm = dt3155_ioc_s_parm,
693 /*
694 .vidioc_cropcap = dt3155_ioc_cropcap,
695 .vidioc_g_crop = dt3155_ioc_g_crop,
696 .vidioc_s_crop = dt3155_ioc_s_crop,
697 .vidioc_enum_framesizes = dt3155_ioc_enum_framesizes,
698 .vidioc_enum_frameintervals = dt3155_ioc_enum_frameintervals,
699 */
700 };
701
702 static int __devinit
dt3155_init_board(struct pci_dev * pdev)703 dt3155_init_board(struct pci_dev *pdev)
704 {
705 struct dt3155_priv *pd = pci_get_drvdata(pdev);
706 void *buf_cpu;
707 dma_addr_t buf_dma;
708 int i;
709 u8 tmp;
710
711 pci_set_master(pdev); /* dt3155 needs it */
712
713 /* resetting the adapter */
714 iowrite32(FLD_CRPT_ODD | FLD_CRPT_EVEN | FLD_DN_ODD | FLD_DN_EVEN,
715 pd->regs + CSR1);
716 mmiowb();
717 msleep(20);
718
719 /* initializing adaper registers */
720 iowrite32(FIFO_EN | SRST, pd->regs + CSR1);
721 mmiowb();
722 iowrite32(0xEEEEEE01, pd->regs + EVEN_PIXEL_FMT);
723 iowrite32(0xEEEEEE01, pd->regs + ODD_PIXEL_FMT);
724 iowrite32(0x00000020, pd->regs + FIFO_TRIGER);
725 iowrite32(0x00000103, pd->regs + XFER_MODE);
726 iowrite32(0, pd->regs + RETRY_WAIT_CNT);
727 iowrite32(0, pd->regs + INT_CSR);
728 iowrite32(1, pd->regs + EVEN_FLD_MASK);
729 iowrite32(1, pd->regs + ODD_FLD_MASK);
730 iowrite32(0, pd->regs + MASK_LENGTH);
731 iowrite32(0x0005007C, pd->regs + FIFO_FLAG_CNT);
732 iowrite32(0x01010101, pd->regs + IIC_CLK_DUR);
733 mmiowb();
734
735 /* verifying that we have a DT3155 board (not just a SAA7116 chip) */
736 read_i2c_reg(pd->regs, DT_ID, &tmp);
737 if (tmp != DT3155_ID)
738 return -ENODEV;
739
740 /* initialize AD LUT */
741 write_i2c_reg(pd->regs, AD_ADDR, 0);
742 for (i = 0; i < 256; i++)
743 write_i2c_reg(pd->regs, AD_LUT, i);
744
745 /* initialize ADC references */
746 /* FIXME: pos_ref & neg_ref depend on VT_50HZ */
747 write_i2c_reg(pd->regs, AD_ADDR, AD_CMD_REG);
748 write_i2c_reg(pd->regs, AD_CMD, VIDEO_CNL_1 | SYNC_CNL_1 | SYNC_LVL_3);
749 write_i2c_reg(pd->regs, AD_ADDR, AD_POS_REF);
750 write_i2c_reg(pd->regs, AD_CMD, 34);
751 write_i2c_reg(pd->regs, AD_ADDR, AD_NEG_REF);
752 write_i2c_reg(pd->regs, AD_CMD, 0);
753
754 /* initialize PM LUT */
755 write_i2c_reg(pd->regs, CONFIG, pd->config | PM_LUT_PGM);
756 for (i = 0; i < 256; i++) {
757 write_i2c_reg(pd->regs, PM_LUT_ADDR, i);
758 write_i2c_reg(pd->regs, PM_LUT_DATA, i);
759 }
760 write_i2c_reg(pd->regs, CONFIG, pd->config | PM_LUT_PGM | PM_LUT_SEL);
761 for (i = 0; i < 256; i++) {
762 write_i2c_reg(pd->regs, PM_LUT_ADDR, i);
763 write_i2c_reg(pd->regs, PM_LUT_DATA, i);
764 }
765 write_i2c_reg(pd->regs, CONFIG, pd->config); /* ACQ_MODE_EVEN */
766
767 /* select chanel 1 for input and set sync level */
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
771 /* allocate memory, and initialize the DMA machine */
772 buf_cpu = dma_alloc_coherent(&pdev->dev, DT3155_BUF_SIZE, &buf_dma,
773 GFP_KERNEL);
774 if (!buf_cpu)
775 return -ENOMEM;
776 iowrite32(buf_dma, pd->regs + EVEN_DMA_START);
777 iowrite32(buf_dma, pd->regs + ODD_DMA_START);
778 iowrite32(0, pd->regs + EVEN_DMA_STRIDE);
779 iowrite32(0, pd->regs + ODD_DMA_STRIDE);
780
781 /* Perform a pseudo even field acquire */
782 iowrite32(FIFO_EN | SRST | CAP_CONT_ODD, pd->regs + CSR1);
783 write_i2c_reg(pd->regs, CSR2, pd->csr2 | SYNC_SNTL);
784 write_i2c_reg(pd->regs, CONFIG, pd->config);
785 write_i2c_reg(pd->regs, EVEN_CSR, CSR_SNGL);
786 write_i2c_reg(pd->regs, CSR2, pd->csr2 | BUSY_EVEN | SYNC_SNTL);
787 msleep(100);
788 read_i2c_reg(pd->regs, CSR2, &tmp);
789 write_i2c_reg(pd->regs, EVEN_CSR, CSR_ERROR | CSR_SNGL | CSR_DONE);
790 write_i2c_reg(pd->regs, ODD_CSR, CSR_ERROR | CSR_SNGL | CSR_DONE);
791 write_i2c_reg(pd->regs, CSR2, pd->csr2);
792 iowrite32(FIFO_EN | SRST | FLD_DN_EVEN | FLD_DN_ODD, pd->regs + CSR1);
793
794 /* deallocate memory */
795 dma_free_coherent(&pdev->dev, DT3155_BUF_SIZE, buf_cpu, buf_dma);
796 if (tmp & BUSY_EVEN)
797 return -EIO;
798 return 0;
799 }
800
801 static struct video_device dt3155_vdev = {
802 .name = DT3155_NAME,
803 .fops = &dt3155_fops,
804 .ioctl_ops = &dt3155_ioctl_ops,
805 .minor = -1,
806 .release = video_device_release,
807 .tvnorms = DT3155_CURRENT_NORM,
808 .current_norm = DT3155_CURRENT_NORM,
809 };
810
811 /* same as in drivers/base/dma-coherent.c */
812 struct dma_coherent_mem {
813 void *virt_base;
814 dma_addr_t device_base;
815 int size;
816 int flags;
817 unsigned long *bitmap;
818 };
819
820 static int __devinit
dt3155_alloc_coherent(struct device * dev,size_t size,int flags)821 dt3155_alloc_coherent(struct device *dev, size_t size, int flags)
822 {
823 struct dma_coherent_mem *mem;
824 dma_addr_t dev_base;
825 int pages = size >> PAGE_SHIFT;
826 int bitmap_size = BITS_TO_LONGS(pages) * sizeof(long);
827
828 if ((flags & DMA_MEMORY_MAP) == 0)
829 goto out;
830 if (!size)
831 goto out;
832 if (dev->dma_mem)
833 goto out;
834
835 mem = kzalloc(sizeof(*mem), GFP_KERNEL);
836 if (!mem)
837 goto out;
838 mem->virt_base = dma_alloc_coherent(dev, size, &dev_base,
839 DT3155_COH_FLAGS);
840 if (!mem->virt_base)
841 goto err_alloc_coherent;
842 mem->bitmap = kzalloc(bitmap_size, GFP_KERNEL);
843 if (!mem->bitmap)
844 goto err_bitmap;
845
846 /* coherent_dma_mask is already set to 32 bits */
847 mem->device_base = dev_base;
848 mem->size = pages;
849 mem->flags = flags;
850 dev->dma_mem = mem;
851 return DMA_MEMORY_MAP;
852
853 err_bitmap:
854 dma_free_coherent(dev, size, mem->virt_base, dev_base);
855 err_alloc_coherent:
856 kfree(mem);
857 out:
858 return 0;
859 }
860
861 static void __devexit
dt3155_free_coherent(struct device * dev)862 dt3155_free_coherent(struct device *dev)
863 {
864 struct dma_coherent_mem *mem = dev->dma_mem;
865
866 if (!mem)
867 return;
868 dev->dma_mem = NULL;
869 dma_free_coherent(dev, mem->size << PAGE_SHIFT,
870 mem->virt_base, mem->device_base);
871 kfree(mem->bitmap);
872 kfree(mem);
873 }
874
875 static int __devinit
dt3155_probe(struct pci_dev * pdev,const struct pci_device_id * id)876 dt3155_probe(struct pci_dev *pdev, const struct pci_device_id *id)
877 {
878 int err;
879 struct dt3155_priv *pd;
880
881 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
882 if (err)
883 return -ENODEV;
884 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
885 if (err)
886 return -ENODEV;
887 pd = kzalloc(sizeof(*pd), GFP_KERNEL);
888 if (!pd)
889 return -ENOMEM;
890 pd->vdev = video_device_alloc();
891 if (!pd->vdev)
892 goto err_video_device_alloc;
893 *pd->vdev = dt3155_vdev;
894 pci_set_drvdata(pdev, pd); /* for use in dt3155_remove() */
895 video_set_drvdata(pd->vdev, pd); /* for use in video_fops */
896 pd->users = 0;
897 pd->pdev = pdev;
898 INIT_LIST_HEAD(&pd->dmaq);
899 mutex_init(&pd->mux);
900 pd->vdev->lock = &pd->mux; /* for locking v4l2_file_operations */
901 spin_lock_init(&pd->lock);
902 pd->csr2 = csr2_init;
903 pd->config = config_init;
904 err = pci_enable_device(pdev);
905 if (err)
906 goto err_enable_dev;
907 err = pci_request_region(pdev, 0, pci_name(pdev));
908 if (err)
909 goto err_req_region;
910 pd->regs = pci_iomap(pdev, 0, pci_resource_len(pd->pdev, 0));
911 if (!pd->regs) {
912 err = -ENOMEM;
913 goto err_pci_iomap;
914 }
915 err = dt3155_init_board(pdev);
916 if (err)
917 goto err_init_board;
918 err = video_register_device(pd->vdev, VFL_TYPE_GRABBER, -1);
919 if (err)
920 goto err_init_board;
921 if (dt3155_alloc_coherent(&pdev->dev, DT3155_CHUNK_SIZE,
922 DMA_MEMORY_MAP))
923 dev_info(&pdev->dev, "preallocated 8 buffers\n");
924 dev_info(&pdev->dev, "/dev/video%i is ready\n", pd->vdev->minor);
925 return 0; /* success */
926
927 err_init_board:
928 pci_iounmap(pdev, pd->regs);
929 err_pci_iomap:
930 pci_release_region(pdev, 0);
931 err_req_region:
932 pci_disable_device(pdev);
933 err_enable_dev:
934 video_device_release(pd->vdev);
935 err_video_device_alloc:
936 kfree(pd);
937 return err;
938 }
939
940 static void __devexit
dt3155_remove(struct pci_dev * pdev)941 dt3155_remove(struct pci_dev *pdev)
942 {
943 struct dt3155_priv *pd = pci_get_drvdata(pdev);
944
945 dt3155_free_coherent(&pdev->dev);
946 video_unregister_device(pd->vdev);
947 pci_iounmap(pdev, pd->regs);
948 pci_release_region(pdev, 0);
949 pci_disable_device(pdev);
950 /*
951 * video_device_release() is invoked automatically
952 * see: struct video_device dt3155_vdev
953 */
954 kfree(pd);
955 }
956
957 static DEFINE_PCI_DEVICE_TABLE(pci_ids) = {
958 { PCI_DEVICE(DT3155_VENDOR_ID, DT3155_DEVICE_ID) },
959 { 0, /* zero marks the end */ },
960 };
961 MODULE_DEVICE_TABLE(pci, pci_ids);
962
963 static struct pci_driver pci_driver = {
964 .name = DT3155_NAME,
965 .id_table = pci_ids,
966 .probe = dt3155_probe,
967 .remove = __devexit_p(dt3155_remove),
968 };
969
970 static int __init
dt3155_init_module(void)971 dt3155_init_module(void)
972 {
973 return pci_register_driver(&pci_driver);
974 }
975
976 static void __exit
dt3155_exit_module(void)977 dt3155_exit_module(void)
978 {
979 pci_unregister_driver(&pci_driver);
980 }
981
982 module_init(dt3155_init_module);
983 module_exit(dt3155_exit_module);
984
985 MODULE_DESCRIPTION("video4linux pci-driver for dt3155 frame grabber");
986 MODULE_AUTHOR("Marin Mitov <mitov@issp.bas.bg>");
987 MODULE_VERSION(DT3155_VERSION);
988 MODULE_LICENSE("GPL");
989