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Linux 4.19-rc7
[linux-2.6/btrfs-unstable.git] / drivers / media / pci / dt3155 / dt3155.c
blob1775c36891ae16786b38f3cf32b79f901a4ba2b5
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 ***************************************************************************/
16
17 #include <linux/module.h>
18 #include <linux/stringify.h>
19 #include <linux/delay.h>
20 #include <linux/kthread.h>
21 #include <linux/slab.h>
22 #include <media/v4l2-dev.h>
23 #include <media/v4l2-ioctl.h>
24 #include <media/v4l2-common.h>
25 #include <media/videobuf2-dma-contig.h>
26
27 #include "dt3155.h"
28
29 #define DT3155_DEVICE_ID 0x1223
30
31 /**
32 * read_i2c_reg - reads an internal i2c register
33 *
34 * @addr: dt3155 mmio base address
35 * @index: index (internal address) of register to read
36 * @data: pointer to byte the read data will be placed in
37 *
38 * returns: zero on success or error code
39 *
40 * This function starts reading the specified (by index) register
41 * and busy waits for the process to finish. The result is placed
42 * in a byte pointed by data.
43 */
44 static int read_i2c_reg(void __iomem *addr, u8 index, u8 *data)
45 {
46 u32 tmp = index;
47
48 iowrite32((tmp << 17) | IIC_READ, addr + IIC_CSR2);
49 mmiowb();
50 udelay(45); /* wait at least 43 usec for NEW_CYCLE to clear */
51 if (ioread32(addr + IIC_CSR2) & NEW_CYCLE)
52 return -EIO; /* error: NEW_CYCLE not cleared */
53 tmp = ioread32(addr + IIC_CSR1);
54 if (tmp & DIRECT_ABORT) {
55 /* reset DIRECT_ABORT bit */
56 iowrite32(DIRECT_ABORT, addr + IIC_CSR1);
57 return -EIO; /* error: DIRECT_ABORT set */
58 }
59 *data = tmp >> 24;
60 return 0;
61 }
62
63 /**
64 * write_i2c_reg - writes to an internal i2c register
65 *
66 * @addr: dt3155 mmio base address
67 * @index: index (internal address) of register to read
68 * @data: data to be written
69 *
70 * returns: zero on success or error code
71 *
72 * This function starts writing the specified (by index) register
73 * and busy waits for the process to finish.
74 */
75 static int write_i2c_reg(void __iomem *addr, u8 index, u8 data)
76 {
77 u32 tmp = index;
78
79 iowrite32((tmp << 17) | IIC_WRITE | data, addr + IIC_CSR2);
80 mmiowb();
81 udelay(65); /* wait at least 63 usec for NEW_CYCLE to clear */
82 if (ioread32(addr + IIC_CSR2) & NEW_CYCLE)
83 return -EIO; /* error: NEW_CYCLE not cleared */
84 if (ioread32(addr + IIC_CSR1) & DIRECT_ABORT) {
85 /* reset DIRECT_ABORT bit */
86 iowrite32(DIRECT_ABORT, addr + IIC_CSR1);
87 return -EIO; /* error: DIRECT_ABORT set */
88 }
89 return 0;
90 }
91
92 /**
93 * write_i2c_reg_nowait - writes to an internal i2c register
94 *
95 * @addr: dt3155 mmio base address
96 * @index: index (internal address) of register to read
97 * @data: data to be written
98 *
99 * This function starts writing the specified (by index) register
100 * and then returns.
101 */
102 static void write_i2c_reg_nowait(void __iomem *addr, u8 index, u8 data)
103 {
104 u32 tmp = index;
105
106 iowrite32((tmp << 17) | IIC_WRITE | data, addr + IIC_CSR2);
107 mmiowb();
108 }
109
110 /**
111 * wait_i2c_reg - waits the read/write to finish
112 *
113 * @addr: dt3155 mmio base address
114 *
115 * returns: zero on success or error code
116 *
117 * This function waits reading/writing to finish.
118 */
119 static int wait_i2c_reg(void __iomem *addr)
120 {
121 if (ioread32(addr + IIC_CSR2) & NEW_CYCLE)
122 udelay(65); /* wait at least 63 usec for NEW_CYCLE to clear */
123 if (ioread32(addr + IIC_CSR2) & NEW_CYCLE)
124 return -EIO; /* error: NEW_CYCLE not cleared */
125 if (ioread32(addr + IIC_CSR1) & DIRECT_ABORT) {
126 /* reset DIRECT_ABORT bit */
127 iowrite32(DIRECT_ABORT, addr + IIC_CSR1);
128 return -EIO; /* error: DIRECT_ABORT set */
129 }
130 return 0;
131 }
132
133 static int
134 dt3155_queue_setup(struct vb2_queue *vq,
135 unsigned int *nbuffers, unsigned int *num_planes,
136 unsigned int sizes[], struct device *alloc_devs[])
137
138 {
139 struct dt3155_priv *pd = vb2_get_drv_priv(vq);
140 unsigned size = pd->width * pd->height;
141
142 if (vq->num_buffers + *nbuffers < 2)
143 *nbuffers = 2 - vq->num_buffers;
144 if (*num_planes)
145 return sizes[0] < size ? -EINVAL : 0;
146 *num_planes = 1;
147 sizes[0] = size;
148 return 0;
149 }
150
151 static int dt3155_buf_prepare(struct vb2_buffer *vb)
152 {
153 struct dt3155_priv *pd = vb2_get_drv_priv(vb->vb2_queue);
154
155 vb2_set_plane_payload(vb, 0, pd->width * pd->height);
156 return 0;
157 }
158
159 static int dt3155_start_streaming(struct vb2_queue *q, unsigned count)
160 {
161 struct dt3155_priv *pd = vb2_get_drv_priv(q);
162 struct vb2_buffer *vb = &pd->curr_buf->vb2_buf;
163 dma_addr_t dma_addr;
164
165 pd->sequence = 0;
166 dma_addr = vb2_dma_contig_plane_dma_addr(vb, 0);
167 iowrite32(dma_addr, pd->regs + EVEN_DMA_START);
168 iowrite32(dma_addr + pd->width, pd->regs + ODD_DMA_START);
169 iowrite32(pd->width, pd->regs + EVEN_DMA_STRIDE);
170 iowrite32(pd->width, pd->regs + ODD_DMA_STRIDE);
171 /* enable interrupts, clear all irq flags */
172 iowrite32(FLD_START_EN | FLD_END_ODD_EN | FLD_START |
173 FLD_END_EVEN | FLD_END_ODD, pd->regs + INT_CSR);
174 iowrite32(FIFO_EN | SRST | FLD_CRPT_ODD | FLD_CRPT_EVEN |
175 FLD_DN_ODD | FLD_DN_EVEN | CAP_CONT_EVEN | CAP_CONT_ODD,
176 pd->regs + CSR1);
177 wait_i2c_reg(pd->regs);
178 write_i2c_reg(pd->regs, CONFIG, pd->config);
179 write_i2c_reg(pd->regs, EVEN_CSR, CSR_ERROR | CSR_DONE);
180 write_i2c_reg(pd->regs, ODD_CSR, CSR_ERROR | CSR_DONE);
181
182 /* start the board */
183 write_i2c_reg(pd->regs, CSR2, pd->csr2 | BUSY_EVEN | BUSY_ODD);
184 return 0;
185 }
186
187 static void dt3155_stop_streaming(struct vb2_queue *q)
188 {
189 struct dt3155_priv *pd = vb2_get_drv_priv(q);
190 struct vb2_buffer *vb;
191
192 spin_lock_irq(&pd->lock);
193 /* stop the board */
194 write_i2c_reg_nowait(pd->regs, CSR2, pd->csr2);
195 iowrite32(FIFO_EN | SRST | FLD_CRPT_ODD | FLD_CRPT_EVEN |
196 FLD_DN_ODD | FLD_DN_EVEN, pd->regs + CSR1);
197 /* disable interrupts, clear all irq flags */
198 iowrite32(FLD_START | FLD_END_EVEN | FLD_END_ODD, pd->regs + INT_CSR);
199 spin_unlock_irq(&pd->lock);
200
201 /*
202 * It is not clear whether the DMA stops at once or whether it
203 * will finish the current frame or field first. To be on the
204 * safe side we wait a bit.
205 */
206 msleep(45);
207
208 spin_lock_irq(&pd->lock);
209 if (pd->curr_buf) {
210 vb2_buffer_done(&pd->curr_buf->vb2_buf, VB2_BUF_STATE_ERROR);
211 pd->curr_buf = NULL;
212 }
213
214 while (!list_empty(&pd->dmaq)) {
215 vb = list_first_entry(&pd->dmaq, typeof(*vb), done_entry);
216 list_del(&vb->done_entry);
217 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
218 }
219 spin_unlock_irq(&pd->lock);
220 }
221
222 static void dt3155_buf_queue(struct vb2_buffer *vb)
223 {
224 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
225 struct dt3155_priv *pd = vb2_get_drv_priv(vb->vb2_queue);
226
227 /* pd->vidq.streaming = 1 when dt3155_buf_queue() is invoked */
228 spin_lock_irq(&pd->lock);
229 if (pd->curr_buf)
230 list_add_tail(&vb->done_entry, &pd->dmaq);
231 else
232 pd->curr_buf = vbuf;
233 spin_unlock_irq(&pd->lock);
234 }
235
236 static const struct vb2_ops q_ops = {
237 .queue_setup = dt3155_queue_setup,
238 .wait_prepare = vb2_ops_wait_prepare,
239 .wait_finish = vb2_ops_wait_finish,
240 .buf_prepare = dt3155_buf_prepare,
241 .start_streaming = dt3155_start_streaming,
242 .stop_streaming = dt3155_stop_streaming,
243 .buf_queue = dt3155_buf_queue,
244 };
245
246 static irqreturn_t dt3155_irq_handler_even(int irq, void *dev_id)
247 {
248 struct dt3155_priv *ipd = dev_id;
249 struct vb2_buffer *ivb;
250 dma_addr_t dma_addr;
251 u32 tmp;
252
253 tmp = ioread32(ipd->regs + INT_CSR) & (FLD_START | FLD_END_ODD);
254 if (!tmp)
255 return IRQ_NONE; /* not our irq */
256 if ((tmp & FLD_START) && !(tmp & FLD_END_ODD)) {
257 iowrite32(FLD_START_EN | FLD_END_ODD_EN | FLD_START,
258 ipd->regs + INT_CSR);
259 return IRQ_HANDLED; /* start of field irq */
260 }
261 tmp = ioread32(ipd->regs + CSR1) & (FLD_CRPT_EVEN | FLD_CRPT_ODD);
262 if (tmp) {
263 iowrite32(FIFO_EN | SRST | FLD_CRPT_ODD | FLD_CRPT_EVEN |
264 FLD_DN_ODD | FLD_DN_EVEN |
265 CAP_CONT_EVEN | CAP_CONT_ODD,
266 ipd->regs + CSR1);
267 mmiowb();
268 }
269
270 spin_lock(&ipd->lock);
271 if (ipd->curr_buf && !list_empty(&ipd->dmaq)) {
272 ipd->curr_buf->vb2_buf.timestamp = ktime_get_ns();
273 ipd->curr_buf->sequence = ipd->sequence++;
274 ipd->curr_buf->field = V4L2_FIELD_NONE;
275 vb2_buffer_done(&ipd->curr_buf->vb2_buf, VB2_BUF_STATE_DONE);
276
277 ivb = list_first_entry(&ipd->dmaq, typeof(*ivb), done_entry);
278 list_del(&ivb->done_entry);
279 ipd->curr_buf = to_vb2_v4l2_buffer(ivb);
280 dma_addr = vb2_dma_contig_plane_dma_addr(ivb, 0);
281 iowrite32(dma_addr, ipd->regs + EVEN_DMA_START);
282 iowrite32(dma_addr + ipd->width, ipd->regs + ODD_DMA_START);
283 iowrite32(ipd->width, ipd->regs + EVEN_DMA_STRIDE);
284 iowrite32(ipd->width, ipd->regs + ODD_DMA_STRIDE);
285 mmiowb();
286 }
287
288 /* enable interrupts, clear all irq flags */
289 iowrite32(FLD_START_EN | FLD_END_ODD_EN | FLD_START |
290 FLD_END_EVEN | FLD_END_ODD, ipd->regs + INT_CSR);
291 spin_unlock(&ipd->lock);
292 return IRQ_HANDLED;
293 }
294
295 static const struct v4l2_file_operations dt3155_fops = {
296 .owner = THIS_MODULE,
297 .open = v4l2_fh_open,
298 .release = vb2_fop_release,
299 .unlocked_ioctl = video_ioctl2,
300 .read = vb2_fop_read,
301 .mmap = vb2_fop_mmap,
302 .poll = vb2_fop_poll
303 };
304
305 static int dt3155_querycap(struct file *filp, void *p,
306 struct v4l2_capability *cap)
307 {
308 struct dt3155_priv *pd = video_drvdata(filp);
309
310 strcpy(cap->driver, DT3155_NAME);
311 strcpy(cap->card, DT3155_NAME " frame grabber");
312 sprintf(cap->bus_info, "PCI:%s", pci_name(pd->pdev));
313 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE |
314 V4L2_CAP_STREAMING | V4L2_CAP_READWRITE;
315 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
316 return 0;
317 }
318
319 static int dt3155_enum_fmt_vid_cap(struct file *filp,
320 void *p, struct v4l2_fmtdesc *f)
321 {
322 if (f->index)
323 return -EINVAL;
324 f->pixelformat = V4L2_PIX_FMT_GREY;
325 strcpy(f->description, "8-bit Greyscale");
326 return 0;
327 }
328
329 static int dt3155_fmt_vid_cap(struct file *filp, void *p, struct v4l2_format *f)
330 {
331 struct dt3155_priv *pd = video_drvdata(filp);
332
333 f->fmt.pix.width = pd->width;
334 f->fmt.pix.height = pd->height;
335 f->fmt.pix.pixelformat = V4L2_PIX_FMT_GREY;
336 f->fmt.pix.field = V4L2_FIELD_NONE;
337 f->fmt.pix.bytesperline = f->fmt.pix.width;
338 f->fmt.pix.sizeimage = f->fmt.pix.width * f->fmt.pix.height;
339 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
340 return 0;
341 }
342
343 static int dt3155_g_std(struct file *filp, void *p, v4l2_std_id *norm)
344 {
345 struct dt3155_priv *pd = video_drvdata(filp);
346
347 *norm = pd->std;
348 return 0;
349 }
350
351 static int dt3155_s_std(struct file *filp, void *p, v4l2_std_id norm)
352 {
353 struct dt3155_priv *pd = video_drvdata(filp);
354
355 if (pd->std == norm)
356 return 0;
357 if (vb2_is_busy(&pd->vidq))
358 return -EBUSY;
359 pd->std = norm;
360 if (pd->std & V4L2_STD_525_60) {
361 pd->csr2 = VT_60HZ;
362 pd->width = 640;
363 pd->height = 480;
364 } else {
365 pd->csr2 = VT_50HZ;
366 pd->width = 768;
367 pd->height = 576;
368 }
369 return 0;
370 }
371
372 static int dt3155_enum_input(struct file *filp, void *p,
373 struct v4l2_input *input)
374 {
375 if (input->index > 3)
376 return -EINVAL;
377 if (input->index)
378 snprintf(input->name, sizeof(input->name), "VID%d",
379 input->index);
380 else
381 strlcpy(input->name, "J2/VID0", sizeof(input->name));
382 input->type = V4L2_INPUT_TYPE_CAMERA;
383 input->std = V4L2_STD_ALL;
384 input->status = 0;
385 return 0;
386 }
387
388 static int dt3155_g_input(struct file *filp, void *p, unsigned int *i)
389 {
390 struct dt3155_priv *pd = video_drvdata(filp);
391
392 *i = pd->input;
393 return 0;
394 }
395
396 static int dt3155_s_input(struct file *filp, void *p, unsigned int i)
397 {
398 struct dt3155_priv *pd = video_drvdata(filp);
399
400 if (i > 3)
401 return -EINVAL;
402 pd->input = i;
403 write_i2c_reg(pd->regs, AD_ADDR, AD_CMD_REG);
404 write_i2c_reg(pd->regs, AD_CMD, (i << 6) | (i << 4) | SYNC_LVL_3);
405 return 0;
406 }
407
408 static const struct v4l2_ioctl_ops dt3155_ioctl_ops = {
409 .vidioc_querycap = dt3155_querycap,
410 .vidioc_enum_fmt_vid_cap = dt3155_enum_fmt_vid_cap,
411 .vidioc_try_fmt_vid_cap = dt3155_fmt_vid_cap,
412 .vidioc_g_fmt_vid_cap = dt3155_fmt_vid_cap,
413 .vidioc_s_fmt_vid_cap = dt3155_fmt_vid_cap,
414 .vidioc_reqbufs = vb2_ioctl_reqbufs,
415 .vidioc_create_bufs = vb2_ioctl_create_bufs,
416 .vidioc_querybuf = vb2_ioctl_querybuf,
417 .vidioc_expbuf = vb2_ioctl_expbuf,
418 .vidioc_qbuf = vb2_ioctl_qbuf,
419 .vidioc_dqbuf = vb2_ioctl_dqbuf,
420 .vidioc_streamon = vb2_ioctl_streamon,
421 .vidioc_streamoff = vb2_ioctl_streamoff,
422 .vidioc_g_std = dt3155_g_std,
423 .vidioc_s_std = dt3155_s_std,
424 .vidioc_enum_input = dt3155_enum_input,
425 .vidioc_g_input = dt3155_g_input,
426 .vidioc_s_input = dt3155_s_input,
427 };
428
429 static int dt3155_init_board(struct dt3155_priv *pd)
430 {
431 struct pci_dev *pdev = pd->pdev;
432 int i;
433 u8 tmp = 0;
434
435 pci_set_master(pdev); /* dt3155 needs it */
436
437 /* resetting the adapter */
438 iowrite32(ADDR_ERR_ODD | ADDR_ERR_EVEN | FLD_CRPT_ODD | FLD_CRPT_EVEN |
439 FLD_DN_ODD | FLD_DN_EVEN, pd->regs + CSR1);
440 mmiowb();
441 msleep(20);
442
443 /* initializing adapter registers */
444 iowrite32(FIFO_EN | SRST, pd->regs + CSR1);
445 mmiowb();
446 iowrite32(0xEEEEEE01, pd->regs + EVEN_PIXEL_FMT);
447 iowrite32(0xEEEEEE01, pd->regs + ODD_PIXEL_FMT);
448 iowrite32(0x00000020, pd->regs + FIFO_TRIGER);
449 iowrite32(0x00000103, pd->regs + XFER_MODE);
450 iowrite32(0, pd->regs + RETRY_WAIT_CNT);
451 iowrite32(0, pd->regs + INT_CSR);
452 iowrite32(1, pd->regs + EVEN_FLD_MASK);
453 iowrite32(1, pd->regs + ODD_FLD_MASK);
454 iowrite32(0, pd->regs + MASK_LENGTH);
455 iowrite32(0x0005007C, pd->regs + FIFO_FLAG_CNT);
456 iowrite32(0x01010101, pd->regs + IIC_CLK_DUR);
457 mmiowb();
458
459 /* verifying that we have a DT3155 board (not just a SAA7116 chip) */
460 read_i2c_reg(pd->regs, DT_ID, &tmp);
461 if (tmp != DT3155_ID)
462 return -ENODEV;
463
464 /* initialize AD LUT */
465 write_i2c_reg(pd->regs, AD_ADDR, 0);
466 for (i = 0; i < 256; i++)
467 write_i2c_reg(pd->regs, AD_LUT, i);
468
469 /* initialize ADC references */
470 /* FIXME: pos_ref & neg_ref depend on VT_50HZ */
471 write_i2c_reg(pd->regs, AD_ADDR, AD_CMD_REG);
472 write_i2c_reg(pd->regs, AD_CMD, VIDEO_CNL_1 | SYNC_CNL_1 | SYNC_LVL_3);
473 write_i2c_reg(pd->regs, AD_ADDR, AD_POS_REF);
474 write_i2c_reg(pd->regs, AD_CMD, 34);
475 write_i2c_reg(pd->regs, AD_ADDR, AD_NEG_REF);
476 write_i2c_reg(pd->regs, AD_CMD, 0);
477
478 /* initialize PM LUT */
479 write_i2c_reg(pd->regs, CONFIG, pd->config | PM_LUT_PGM);
480 for (i = 0; i < 256; i++) {
481 write_i2c_reg(pd->regs, PM_LUT_ADDR, i);
482 write_i2c_reg(pd->regs, PM_LUT_DATA, i);
483 }
484 write_i2c_reg(pd->regs, CONFIG, pd->config | PM_LUT_PGM | PM_LUT_SEL);
485 for (i = 0; i < 256; i++) {
486 write_i2c_reg(pd->regs, PM_LUT_ADDR, i);
487 write_i2c_reg(pd->regs, PM_LUT_DATA, i);
488 }
489 write_i2c_reg(pd->regs, CONFIG, pd->config); /* ACQ_MODE_EVEN */
490
491 /* select channel 1 for input and set sync level */
492 write_i2c_reg(pd->regs, AD_ADDR, AD_CMD_REG);
493 write_i2c_reg(pd->regs, AD_CMD, VIDEO_CNL_1 | SYNC_CNL_1 | SYNC_LVL_3);
494
495 /* disable all irqs, clear all irq flags */
496 iowrite32(FLD_START | FLD_END_EVEN | FLD_END_ODD,
497 pd->regs + INT_CSR);
498
499 return 0;
500 }
501
502 static const struct video_device dt3155_vdev = {
503 .name = DT3155_NAME,
504 .fops = &dt3155_fops,
505 .ioctl_ops = &dt3155_ioctl_ops,
506 .minor = -1,
507 .release = video_device_release_empty,
508 .tvnorms = V4L2_STD_ALL,
509 };
510
511 static int dt3155_probe(struct pci_dev *pdev, const struct pci_device_id *id)
512 {
513 int err;
514 struct dt3155_priv *pd;
515
516 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
517 if (err)
518 return -ENODEV;
519 pd = devm_kzalloc(&pdev->dev, sizeof(*pd), GFP_KERNEL);
520 if (!pd)
521 return -ENOMEM;
522
523 err = v4l2_device_register(&pdev->dev, &pd->v4l2_dev);
524 if (err)
525 return err;
526 pd->vdev = dt3155_vdev;
527 pd->vdev.v4l2_dev = &pd->v4l2_dev;
528 video_set_drvdata(&pd->vdev, pd); /* for use in video_fops */
529 pd->pdev = pdev;
530 pd->std = V4L2_STD_625_50;
531 pd->csr2 = VT_50HZ;
532 pd->width = 768;
533 pd->height = 576;
534 INIT_LIST_HEAD(&pd->dmaq);
535 mutex_init(&pd->mux);
536 pd->vdev.lock = &pd->mux; /* for locking v4l2_file_operations */
537 pd->vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
538 pd->vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
539 pd->vidq.io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ;
540 pd->vidq.ops = &q_ops;
541 pd->vidq.mem_ops = &vb2_dma_contig_memops;
542 pd->vidq.drv_priv = pd;
543 pd->vidq.min_buffers_needed = 2;
544 pd->vidq.gfp_flags = GFP_DMA32;
545 pd->vidq.lock = &pd->mux; /* for locking v4l2_file_operations */
546 pd->vidq.dev = &pdev->dev;
547 pd->vdev.queue = &pd->vidq;
548 err = vb2_queue_init(&pd->vidq);
549 if (err < 0)
550 goto err_v4l2_dev_unreg;
551 spin_lock_init(&pd->lock);
552 pd->config = ACQ_MODE_EVEN;
553 err = pci_enable_device(pdev);
554 if (err)
555 goto err_v4l2_dev_unreg;
556 err = pci_request_region(pdev, 0, pci_name(pdev));
557 if (err)
558 goto err_pci_disable;
559 pd->regs = pci_iomap(pdev, 0, pci_resource_len(pd->pdev, 0));
560 if (!pd->regs) {
561 err = -ENOMEM;
562 goto err_free_reg;
563 }
564 err = dt3155_init_board(pd);
565 if (err)
566 goto err_iounmap;
567 err = request_irq(pd->pdev->irq, dt3155_irq_handler_even,
568 IRQF_SHARED, DT3155_NAME, pd);
569 if (err)
570 goto err_iounmap;
571 err = video_register_device(&pd->vdev, VFL_TYPE_GRABBER, -1);
572 if (err)
573 goto err_free_irq;
574 dev_info(&pdev->dev, "/dev/video%i is ready\n", pd->vdev.minor);
575 return 0; /* success */
576
577 err_free_irq:
578 free_irq(pd->pdev->irq, pd);
579 err_iounmap:
580 pci_iounmap(pdev, pd->regs);
581 err_free_reg:
582 pci_release_region(pdev, 0);
583 err_pci_disable:
584 pci_disable_device(pdev);
585 err_v4l2_dev_unreg:
586 v4l2_device_unregister(&pd->v4l2_dev);
587 return err;
588 }
589
590 static void dt3155_remove(struct pci_dev *pdev)
591 {
592 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev);
593 struct dt3155_priv *pd = container_of(v4l2_dev, struct dt3155_priv,
594 v4l2_dev);
595
596 video_unregister_device(&pd->vdev);
597 free_irq(pd->pdev->irq, pd);
598 vb2_queue_release(&pd->vidq);
599 v4l2_device_unregister(&pd->v4l2_dev);
600 pci_iounmap(pdev, pd->regs);
601 pci_release_region(pdev, 0);
602 pci_disable_device(pdev);
603 }
604
605 static const struct pci_device_id pci_ids[] = {
606 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, DT3155_DEVICE_ID) },
607 { 0, /* zero marks the end */ },
608 };
609 MODULE_DEVICE_TABLE(pci, pci_ids);
610
611 static struct pci_driver pci_driver = {
612 .name = DT3155_NAME,
613 .id_table = pci_ids,
614 .probe = dt3155_probe,
615 .remove = dt3155_remove,
616 };
617
618 module_pci_driver(pci_driver);
619
620 MODULE_DESCRIPTION("video4linux pci-driver for dt3155 frame grabber");
621 MODULE_AUTHOR("Marin Mitov <mitov@issp.bas.bg>");
622 MODULE_VERSION(DT3155_VERSION);
623 MODULE_LICENSE("GPL");
(deprecated) Btrfs devel tree