Commit | Line | Data |
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8091cb7d JM |
1 | /* |
2 | * Support eMMa-PrP through mem2mem framework. | |
3 | * | |
4 | * eMMa-PrP is a piece of HW that allows fetching buffers | |
5 | * from one memory location and do several operations on | |
6 | * them such as scaling or format conversion giving, as a result | |
7 | * a new processed buffer in another memory location. | |
8 | * | |
9 | * Based on mem2mem_testdev.c by Pawel Osciak. | |
10 | * | |
11 | * Copyright (c) 2011 Vista Silicon S.L. | |
12 | * Javier Martin <javier.martin@vista-silicon.com> | |
13 | * | |
14 | * This program is free software; you can redistribute it and/or modify | |
15 | * it under the terms of the GNU General Public License as published by the | |
16 | * Free Software Foundation; either version 2 of the | |
17 | * License, or (at your option) any later version | |
18 | */ | |
19 | #include <linux/module.h> | |
20 | #include <linux/clk.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/interrupt.h> | |
23 | #include <linux/io.h> | |
24 | ||
25 | #include <linux/platform_device.h> | |
26 | #include <media/v4l2-mem2mem.h> | |
27 | #include <media/v4l2-device.h> | |
28 | #include <media/v4l2-ioctl.h> | |
29 | #include <media/videobuf2-dma-contig.h> | |
30 | #include <asm/sizes.h> | |
31 | ||
32 | #define EMMAPRP_MODULE_NAME "mem2mem-emmaprp" | |
33 | ||
34 | MODULE_DESCRIPTION("Mem-to-mem device which supports eMMa-PrP present in mx2 SoCs"); | |
35 | MODULE_AUTHOR("Javier Martin <javier.martin@vista-silicon.com"); | |
36 | MODULE_LICENSE("GPL"); | |
37 | MODULE_VERSION("0.0.1"); | |
38 | ||
39 | static bool debug; | |
40 | module_param(debug, bool, 0644); | |
41 | ||
42 | #define MIN_W 32 | |
43 | #define MIN_H 32 | |
44 | #define MAX_W 2040 | |
45 | #define MAX_H 2046 | |
46 | ||
47 | #define S_ALIGN 1 /* multiple of 2 */ | |
48 | #define W_ALIGN_YUV420 3 /* multiple of 8 */ | |
49 | #define W_ALIGN_OTHERS 2 /* multiple of 4 */ | |
50 | #define H_ALIGN 1 /* multiple of 2 */ | |
51 | ||
52 | /* Flags that indicate a format can be used for capture/output */ | |
53 | #define MEM2MEM_CAPTURE (1 << 0) | |
54 | #define MEM2MEM_OUTPUT (1 << 1) | |
55 | ||
56 | #define MEM2MEM_NAME "m2m-emmaprp" | |
57 | ||
58 | /* In bytes, per queue */ | |
59 | #define MEM2MEM_VID_MEM_LIMIT SZ_16M | |
60 | ||
61 | #define dprintk(dev, fmt, arg...) \ | |
62 | v4l2_dbg(1, debug, &dev->v4l2_dev, "%s: " fmt, __func__, ## arg) | |
63 | ||
64 | /* EMMA PrP */ | |
65 | #define PRP_CNTL 0x00 | |
66 | #define PRP_INTR_CNTL 0x04 | |
67 | #define PRP_INTRSTATUS 0x08 | |
68 | #define PRP_SOURCE_Y_PTR 0x0c | |
69 | #define PRP_SOURCE_CB_PTR 0x10 | |
70 | #define PRP_SOURCE_CR_PTR 0x14 | |
71 | #define PRP_DEST_RGB1_PTR 0x18 | |
72 | #define PRP_DEST_RGB2_PTR 0x1c | |
73 | #define PRP_DEST_Y_PTR 0x20 | |
74 | #define PRP_DEST_CB_PTR 0x24 | |
75 | #define PRP_DEST_CR_PTR 0x28 | |
76 | #define PRP_SRC_FRAME_SIZE 0x2c | |
77 | #define PRP_DEST_CH1_LINE_STRIDE 0x30 | |
78 | #define PRP_SRC_PIXEL_FORMAT_CNTL 0x34 | |
79 | #define PRP_CH1_PIXEL_FORMAT_CNTL 0x38 | |
80 | #define PRP_CH1_OUT_IMAGE_SIZE 0x3c | |
81 | #define PRP_CH2_OUT_IMAGE_SIZE 0x40 | |
82 | #define PRP_SRC_LINE_STRIDE 0x44 | |
83 | #define PRP_CSC_COEF_012 0x48 | |
84 | #define PRP_CSC_COEF_345 0x4c | |
85 | #define PRP_CSC_COEF_678 0x50 | |
86 | #define PRP_CH1_RZ_HORI_COEF1 0x54 | |
87 | #define PRP_CH1_RZ_HORI_COEF2 0x58 | |
88 | #define PRP_CH1_RZ_HORI_VALID 0x5c | |
89 | #define PRP_CH1_RZ_VERT_COEF1 0x60 | |
90 | #define PRP_CH1_RZ_VERT_COEF2 0x64 | |
91 | #define PRP_CH1_RZ_VERT_VALID 0x68 | |
92 | #define PRP_CH2_RZ_HORI_COEF1 0x6c | |
93 | #define PRP_CH2_RZ_HORI_COEF2 0x70 | |
94 | #define PRP_CH2_RZ_HORI_VALID 0x74 | |
95 | #define PRP_CH2_RZ_VERT_COEF1 0x78 | |
96 | #define PRP_CH2_RZ_VERT_COEF2 0x7c | |
97 | #define PRP_CH2_RZ_VERT_VALID 0x80 | |
98 | ||
99 | #define PRP_CNTL_CH1EN (1 << 0) | |
100 | #define PRP_CNTL_CH2EN (1 << 1) | |
101 | #define PRP_CNTL_CSIEN (1 << 2) | |
102 | #define PRP_CNTL_DATA_IN_YUV420 (0 << 3) | |
103 | #define PRP_CNTL_DATA_IN_YUV422 (1 << 3) | |
104 | #define PRP_CNTL_DATA_IN_RGB16 (2 << 3) | |
105 | #define PRP_CNTL_DATA_IN_RGB32 (3 << 3) | |
106 | #define PRP_CNTL_CH1_OUT_RGB8 (0 << 5) | |
107 | #define PRP_CNTL_CH1_OUT_RGB16 (1 << 5) | |
108 | #define PRP_CNTL_CH1_OUT_RGB32 (2 << 5) | |
109 | #define PRP_CNTL_CH1_OUT_YUV422 (3 << 5) | |
110 | #define PRP_CNTL_CH2_OUT_YUV420 (0 << 7) | |
111 | #define PRP_CNTL_CH2_OUT_YUV422 (1 << 7) | |
112 | #define PRP_CNTL_CH2_OUT_YUV444 (2 << 7) | |
113 | #define PRP_CNTL_CH1_LEN (1 << 9) | |
114 | #define PRP_CNTL_CH2_LEN (1 << 10) | |
115 | #define PRP_CNTL_SKIP_FRAME (1 << 11) | |
116 | #define PRP_CNTL_SWRST (1 << 12) | |
117 | #define PRP_CNTL_CLKEN (1 << 13) | |
118 | #define PRP_CNTL_WEN (1 << 14) | |
119 | #define PRP_CNTL_CH1BYP (1 << 15) | |
120 | #define PRP_CNTL_IN_TSKIP(x) ((x) << 16) | |
121 | #define PRP_CNTL_CH1_TSKIP(x) ((x) << 19) | |
122 | #define PRP_CNTL_CH2_TSKIP(x) ((x) << 22) | |
123 | #define PRP_CNTL_INPUT_FIFO_LEVEL(x) ((x) << 25) | |
124 | #define PRP_CNTL_RZ_FIFO_LEVEL(x) ((x) << 27) | |
125 | #define PRP_CNTL_CH2B1EN (1 << 29) | |
126 | #define PRP_CNTL_CH2B2EN (1 << 30) | |
127 | #define PRP_CNTL_CH2FEN (1 << 31) | |
128 | ||
129 | #define PRP_SIZE_HEIGHT(x) (x) | |
130 | #define PRP_SIZE_WIDTH(x) ((x) << 16) | |
131 | ||
132 | /* IRQ Enable and status register */ | |
133 | #define PRP_INTR_RDERR (1 << 0) | |
134 | #define PRP_INTR_CH1WERR (1 << 1) | |
135 | #define PRP_INTR_CH2WERR (1 << 2) | |
136 | #define PRP_INTR_CH1FC (1 << 3) | |
137 | #define PRP_INTR_CH2FC (1 << 5) | |
138 | #define PRP_INTR_LBOVF (1 << 7) | |
139 | #define PRP_INTR_CH2OVF (1 << 8) | |
140 | ||
141 | #define PRP_INTR_ST_RDERR (1 << 0) | |
142 | #define PRP_INTR_ST_CH1WERR (1 << 1) | |
143 | #define PRP_INTR_ST_CH2WERR (1 << 2) | |
144 | #define PRP_INTR_ST_CH2B2CI (1 << 3) | |
145 | #define PRP_INTR_ST_CH2B1CI (1 << 4) | |
146 | #define PRP_INTR_ST_CH1B2CI (1 << 5) | |
147 | #define PRP_INTR_ST_CH1B1CI (1 << 6) | |
148 | #define PRP_INTR_ST_LBOVF (1 << 7) | |
149 | #define PRP_INTR_ST_CH2OVF (1 << 8) | |
150 | ||
151 | struct emmaprp_fmt { | |
152 | char *name; | |
153 | u32 fourcc; | |
154 | /* Types the format can be used for */ | |
155 | u32 types; | |
156 | }; | |
157 | ||
158 | static struct emmaprp_fmt formats[] = { | |
159 | { | |
160 | .name = "YUV 4:2:0 Planar", | |
161 | .fourcc = V4L2_PIX_FMT_YUV420, | |
162 | .types = MEM2MEM_CAPTURE, | |
163 | }, | |
164 | { | |
165 | .name = "4:2:2, packed, YUYV", | |
166 | .fourcc = V4L2_PIX_FMT_YUYV, | |
167 | .types = MEM2MEM_OUTPUT, | |
168 | }, | |
169 | }; | |
170 | ||
171 | /* Per-queue, driver-specific private data */ | |
172 | struct emmaprp_q_data { | |
173 | unsigned int width; | |
174 | unsigned int height; | |
175 | unsigned int sizeimage; | |
176 | struct emmaprp_fmt *fmt; | |
177 | }; | |
178 | ||
179 | enum { | |
180 | V4L2_M2M_SRC = 0, | |
181 | V4L2_M2M_DST = 1, | |
182 | }; | |
183 | ||
184 | #define NUM_FORMATS ARRAY_SIZE(formats) | |
185 | ||
186 | static struct emmaprp_fmt *find_format(struct v4l2_format *f) | |
187 | { | |
188 | struct emmaprp_fmt *fmt; | |
189 | unsigned int k; | |
190 | ||
191 | for (k = 0; k < NUM_FORMATS; k++) { | |
192 | fmt = &formats[k]; | |
193 | if (fmt->fourcc == f->fmt.pix.pixelformat) | |
194 | break; | |
195 | } | |
196 | ||
197 | if (k == NUM_FORMATS) | |
198 | return NULL; | |
199 | ||
200 | return &formats[k]; | |
201 | } | |
202 | ||
203 | struct emmaprp_dev { | |
204 | struct v4l2_device v4l2_dev; | |
205 | struct video_device *vfd; | |
206 | ||
207 | struct mutex dev_mutex; | |
208 | spinlock_t irqlock; | |
209 | ||
210 | int irq_emma; | |
211 | void __iomem *base_emma; | |
212 | struct clk *clk_emma; | |
213 | struct resource *res_emma; | |
214 | ||
215 | struct v4l2_m2m_dev *m2m_dev; | |
216 | struct vb2_alloc_ctx *alloc_ctx; | |
217 | }; | |
218 | ||
219 | struct emmaprp_ctx { | |
220 | struct emmaprp_dev *dev; | |
221 | /* Abort requested by m2m */ | |
222 | int aborting; | |
223 | struct emmaprp_q_data q_data[2]; | |
224 | struct v4l2_m2m_ctx *m2m_ctx; | |
225 | }; | |
226 | ||
227 | static struct emmaprp_q_data *get_q_data(struct emmaprp_ctx *ctx, | |
228 | enum v4l2_buf_type type) | |
229 | { | |
230 | switch (type) { | |
231 | case V4L2_BUF_TYPE_VIDEO_OUTPUT: | |
232 | return &(ctx->q_data[V4L2_M2M_SRC]); | |
233 | case V4L2_BUF_TYPE_VIDEO_CAPTURE: | |
234 | return &(ctx->q_data[V4L2_M2M_DST]); | |
235 | default: | |
236 | BUG(); | |
237 | } | |
238 | return NULL; | |
239 | } | |
240 | ||
241 | /* | |
242 | * mem2mem callbacks | |
243 | */ | |
244 | static void emmaprp_job_abort(void *priv) | |
245 | { | |
246 | struct emmaprp_ctx *ctx = priv; | |
247 | struct emmaprp_dev *pcdev = ctx->dev; | |
248 | ||
249 | ctx->aborting = 1; | |
250 | ||
251 | dprintk(pcdev, "Aborting task\n"); | |
252 | ||
253 | v4l2_m2m_job_finish(pcdev->m2m_dev, ctx->m2m_ctx); | |
254 | } | |
255 | ||
256 | static void emmaprp_lock(void *priv) | |
257 | { | |
258 | struct emmaprp_ctx *ctx = priv; | |
259 | struct emmaprp_dev *pcdev = ctx->dev; | |
260 | mutex_lock(&pcdev->dev_mutex); | |
261 | } | |
262 | ||
263 | static void emmaprp_unlock(void *priv) | |
264 | { | |
265 | struct emmaprp_ctx *ctx = priv; | |
266 | struct emmaprp_dev *pcdev = ctx->dev; | |
267 | mutex_unlock(&pcdev->dev_mutex); | |
268 | } | |
269 | ||
270 | static inline void emmaprp_dump_regs(struct emmaprp_dev *pcdev) | |
271 | { | |
272 | dprintk(pcdev, | |
273 | "eMMa-PrP Registers:\n" | |
274 | " SOURCE_Y_PTR = 0x%08X\n" | |
275 | " SRC_FRAME_SIZE = 0x%08X\n" | |
276 | " DEST_Y_PTR = 0x%08X\n" | |
277 | " DEST_CR_PTR = 0x%08X\n" | |
278 | " DEST_CB_PTR = 0x%08X\n" | |
279 | " CH2_OUT_IMAGE_SIZE = 0x%08X\n" | |
280 | " CNTL = 0x%08X\n", | |
281 | readl(pcdev->base_emma + PRP_SOURCE_Y_PTR), | |
282 | readl(pcdev->base_emma + PRP_SRC_FRAME_SIZE), | |
283 | readl(pcdev->base_emma + PRP_DEST_Y_PTR), | |
284 | readl(pcdev->base_emma + PRP_DEST_CR_PTR), | |
285 | readl(pcdev->base_emma + PRP_DEST_CB_PTR), | |
286 | readl(pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE), | |
287 | readl(pcdev->base_emma + PRP_CNTL)); | |
288 | } | |
289 | ||
290 | static void emmaprp_device_run(void *priv) | |
291 | { | |
292 | struct emmaprp_ctx *ctx = priv; | |
293 | struct emmaprp_q_data *s_q_data, *d_q_data; | |
294 | struct vb2_buffer *src_buf, *dst_buf; | |
295 | struct emmaprp_dev *pcdev = ctx->dev; | |
296 | unsigned int s_width, s_height; | |
297 | unsigned int d_width, d_height; | |
298 | unsigned int d_size; | |
299 | dma_addr_t p_in, p_out; | |
300 | u32 tmp; | |
301 | ||
302 | src_buf = v4l2_m2m_next_src_buf(ctx->m2m_ctx); | |
303 | dst_buf = v4l2_m2m_next_dst_buf(ctx->m2m_ctx); | |
304 | ||
305 | s_q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT); | |
306 | s_width = s_q_data->width; | |
307 | s_height = s_q_data->height; | |
308 | ||
309 | d_q_data = get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE); | |
310 | d_width = d_q_data->width; | |
311 | d_height = d_q_data->height; | |
312 | d_size = d_width * d_height; | |
313 | ||
314 | p_in = vb2_dma_contig_plane_dma_addr(src_buf, 0); | |
315 | p_out = vb2_dma_contig_plane_dma_addr(dst_buf, 0); | |
316 | if (!p_in || !p_out) { | |
317 | v4l2_err(&pcdev->v4l2_dev, | |
318 | "Acquiring kernel pointers to buffers failed\n"); | |
319 | return; | |
320 | } | |
321 | ||
322 | /* Input frame parameters */ | |
323 | writel(p_in, pcdev->base_emma + PRP_SOURCE_Y_PTR); | |
324 | writel(PRP_SIZE_WIDTH(s_width) | PRP_SIZE_HEIGHT(s_height), | |
325 | pcdev->base_emma + PRP_SRC_FRAME_SIZE); | |
326 | ||
327 | /* Output frame parameters */ | |
328 | writel(p_out, pcdev->base_emma + PRP_DEST_Y_PTR); | |
329 | writel(p_out + d_size, pcdev->base_emma + PRP_DEST_CB_PTR); | |
330 | writel(p_out + d_size + (d_size >> 2), | |
331 | pcdev->base_emma + PRP_DEST_CR_PTR); | |
332 | writel(PRP_SIZE_WIDTH(d_width) | PRP_SIZE_HEIGHT(d_height), | |
333 | pcdev->base_emma + PRP_CH2_OUT_IMAGE_SIZE); | |
334 | ||
335 | /* IRQ configuration */ | |
336 | tmp = readl(pcdev->base_emma + PRP_INTR_CNTL); | |
337 | writel(tmp | PRP_INTR_RDERR | | |
338 | PRP_INTR_CH2WERR | | |
339 | PRP_INTR_CH2FC, | |
340 | pcdev->base_emma + PRP_INTR_CNTL); | |
341 | ||
342 | emmaprp_dump_regs(pcdev); | |
343 | ||
344 | /* Enable transfer */ | |
345 | tmp = readl(pcdev->base_emma + PRP_CNTL); | |
346 | writel(tmp | PRP_CNTL_CH2_OUT_YUV420 | | |
347 | PRP_CNTL_DATA_IN_YUV422 | | |
348 | PRP_CNTL_CH2EN, | |
349 | pcdev->base_emma + PRP_CNTL); | |
350 | } | |
351 | ||
352 | static irqreturn_t emmaprp_irq(int irq_emma, void *data) | |
353 | { | |
354 | struct emmaprp_dev *pcdev = data; | |
355 | struct emmaprp_ctx *curr_ctx; | |
356 | struct vb2_buffer *src_vb, *dst_vb; | |
357 | unsigned long flags; | |
358 | u32 irqst; | |
359 | ||
360 | /* Check irq flags and clear irq */ | |
361 | irqst = readl(pcdev->base_emma + PRP_INTRSTATUS); | |
362 | writel(irqst, pcdev->base_emma + PRP_INTRSTATUS); | |
363 | dprintk(pcdev, "irqst = 0x%08x\n", irqst); | |
364 | ||
365 | curr_ctx = v4l2_m2m_get_curr_priv(pcdev->m2m_dev); | |
366 | if (curr_ctx == NULL) { | |
367 | pr_err("Instance released before the end of transaction\n"); | |
368 | return IRQ_HANDLED; | |
369 | } | |
370 | ||
371 | if (!curr_ctx->aborting) { | |
372 | if ((irqst & PRP_INTR_ST_RDERR) || | |
373 | (irqst & PRP_INTR_ST_CH2WERR)) { | |
374 | pr_err("PrP bus error ocurred, this transfer is probably corrupted\n"); | |
375 | writel(PRP_CNTL_SWRST, pcdev->base_emma + PRP_CNTL); | |
376 | } else if (irqst & PRP_INTR_ST_CH2B1CI) { /* buffer ready */ | |
377 | src_vb = v4l2_m2m_src_buf_remove(curr_ctx->m2m_ctx); | |
378 | dst_vb = v4l2_m2m_dst_buf_remove(curr_ctx->m2m_ctx); | |
379 | ||
380 | spin_lock_irqsave(&pcdev->irqlock, flags); | |
381 | v4l2_m2m_buf_done(src_vb, VB2_BUF_STATE_DONE); | |
382 | v4l2_m2m_buf_done(dst_vb, VB2_BUF_STATE_DONE); | |
383 | spin_unlock_irqrestore(&pcdev->irqlock, flags); | |
384 | } | |
385 | } | |
386 | ||
387 | v4l2_m2m_job_finish(pcdev->m2m_dev, curr_ctx->m2m_ctx); | |
388 | return IRQ_HANDLED; | |
389 | } | |
390 | ||
391 | /* | |
392 | * video ioctls | |
393 | */ | |
394 | static int vidioc_querycap(struct file *file, void *priv, | |
395 | struct v4l2_capability *cap) | |
396 | { | |
397 | strncpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver) - 1); | |
398 | strncpy(cap->card, MEM2MEM_NAME, sizeof(cap->card) - 1); | |
f0476a83 SN |
399 | /* |
400 | * This is only a mem-to-mem video device. The capture and output | |
401 | * device capability flags are left only for backward compatibility | |
402 | * and are scheduled for removal. | |
403 | */ | |
404 | cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT | | |
405 | V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING; | |
8091cb7d JM |
406 | return 0; |
407 | } | |
408 | ||
409 | static int enum_fmt(struct v4l2_fmtdesc *f, u32 type) | |
410 | { | |
411 | int i, num; | |
412 | struct emmaprp_fmt *fmt; | |
413 | ||
414 | num = 0; | |
415 | ||
416 | for (i = 0; i < NUM_FORMATS; ++i) { | |
417 | if (formats[i].types & type) { | |
418 | /* index-th format of type type found ? */ | |
419 | if (num == f->index) | |
420 | break; | |
421 | /* Correct type but haven't reached our index yet, | |
422 | * just increment per-type index */ | |
423 | ++num; | |
424 | } | |
425 | } | |
426 | ||
427 | if (i < NUM_FORMATS) { | |
428 | /* Format found */ | |
429 | fmt = &formats[i]; | |
430 | strlcpy(f->description, fmt->name, sizeof(f->description) - 1); | |
431 | f->pixelformat = fmt->fourcc; | |
432 | return 0; | |
433 | } | |
434 | ||
435 | /* Format not found */ | |
436 | return -EINVAL; | |
437 | } | |
438 | ||
439 | static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, | |
440 | struct v4l2_fmtdesc *f) | |
441 | { | |
442 | return enum_fmt(f, MEM2MEM_CAPTURE); | |
443 | } | |
444 | ||
445 | static int vidioc_enum_fmt_vid_out(struct file *file, void *priv, | |
446 | struct v4l2_fmtdesc *f) | |
447 | { | |
448 | return enum_fmt(f, MEM2MEM_OUTPUT); | |
449 | } | |
450 | ||
451 | static int vidioc_g_fmt(struct emmaprp_ctx *ctx, struct v4l2_format *f) | |
452 | { | |
453 | struct vb2_queue *vq; | |
454 | struct emmaprp_q_data *q_data; | |
455 | ||
456 | vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type); | |
457 | if (!vq) | |
458 | return -EINVAL; | |
459 | ||
460 | q_data = get_q_data(ctx, f->type); | |
461 | ||
462 | f->fmt.pix.width = q_data->width; | |
463 | f->fmt.pix.height = q_data->height; | |
464 | f->fmt.pix.field = V4L2_FIELD_NONE; | |
465 | f->fmt.pix.pixelformat = q_data->fmt->fourcc; | |
466 | if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420) | |
467 | f->fmt.pix.bytesperline = q_data->width * 3 / 2; | |
468 | else /* YUYV */ | |
469 | f->fmt.pix.bytesperline = q_data->width * 2; | |
470 | f->fmt.pix.sizeimage = q_data->sizeimage; | |
471 | ||
472 | return 0; | |
473 | } | |
474 | ||
475 | static int vidioc_g_fmt_vid_out(struct file *file, void *priv, | |
476 | struct v4l2_format *f) | |
477 | { | |
478 | return vidioc_g_fmt(priv, f); | |
479 | } | |
480 | ||
481 | static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, | |
482 | struct v4l2_format *f) | |
483 | { | |
484 | return vidioc_g_fmt(priv, f); | |
485 | } | |
486 | ||
487 | static int vidioc_try_fmt(struct v4l2_format *f) | |
488 | { | |
489 | enum v4l2_field field; | |
490 | ||
491 | ||
492 | if (!find_format(f)) | |
493 | return -EINVAL; | |
494 | ||
495 | field = f->fmt.pix.field; | |
496 | if (field == V4L2_FIELD_ANY) | |
497 | field = V4L2_FIELD_NONE; | |
498 | else if (V4L2_FIELD_NONE != field) | |
499 | return -EINVAL; | |
500 | ||
501 | /* V4L2 specification suggests the driver corrects the format struct | |
502 | * if any of the dimensions is unsupported */ | |
503 | f->fmt.pix.field = field; | |
504 | ||
505 | if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUV420) { | |
506 | v4l_bound_align_image(&f->fmt.pix.width, MIN_W, MAX_W, | |
507 | W_ALIGN_YUV420, &f->fmt.pix.height, | |
508 | MIN_H, MAX_H, H_ALIGN, S_ALIGN); | |
509 | f->fmt.pix.bytesperline = f->fmt.pix.width * 3 / 2; | |
510 | } else { | |
511 | v4l_bound_align_image(&f->fmt.pix.width, MIN_W, MAX_W, | |
512 | W_ALIGN_OTHERS, &f->fmt.pix.height, | |
513 | MIN_H, MAX_H, H_ALIGN, S_ALIGN); | |
514 | f->fmt.pix.bytesperline = f->fmt.pix.width * 2; | |
515 | } | |
516 | f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline; | |
517 | ||
518 | return 0; | |
519 | } | |
520 | ||
521 | static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, | |
522 | struct v4l2_format *f) | |
523 | { | |
524 | struct emmaprp_fmt *fmt; | |
525 | struct emmaprp_ctx *ctx = priv; | |
526 | ||
527 | fmt = find_format(f); | |
528 | if (!fmt || !(fmt->types & MEM2MEM_CAPTURE)) { | |
529 | v4l2_err(&ctx->dev->v4l2_dev, | |
530 | "Fourcc format (0x%08x) invalid.\n", | |
531 | f->fmt.pix.pixelformat); | |
532 | return -EINVAL; | |
533 | } | |
534 | ||
535 | return vidioc_try_fmt(f); | |
536 | } | |
537 | ||
538 | static int vidioc_try_fmt_vid_out(struct file *file, void *priv, | |
539 | struct v4l2_format *f) | |
540 | { | |
541 | struct emmaprp_fmt *fmt; | |
542 | struct emmaprp_ctx *ctx = priv; | |
543 | ||
544 | fmt = find_format(f); | |
545 | if (!fmt || !(fmt->types & MEM2MEM_OUTPUT)) { | |
546 | v4l2_err(&ctx->dev->v4l2_dev, | |
547 | "Fourcc format (0x%08x) invalid.\n", | |
548 | f->fmt.pix.pixelformat); | |
549 | return -EINVAL; | |
550 | } | |
551 | ||
552 | return vidioc_try_fmt(f); | |
553 | } | |
554 | ||
555 | static int vidioc_s_fmt(struct emmaprp_ctx *ctx, struct v4l2_format *f) | |
556 | { | |
557 | struct emmaprp_q_data *q_data; | |
558 | struct vb2_queue *vq; | |
559 | int ret; | |
560 | ||
561 | vq = v4l2_m2m_get_vq(ctx->m2m_ctx, f->type); | |
562 | if (!vq) | |
563 | return -EINVAL; | |
564 | ||
565 | q_data = get_q_data(ctx, f->type); | |
566 | if (!q_data) | |
567 | return -EINVAL; | |
568 | ||
569 | if (vb2_is_busy(vq)) { | |
570 | v4l2_err(&ctx->dev->v4l2_dev, "%s queue busy\n", __func__); | |
571 | return -EBUSY; | |
572 | } | |
573 | ||
574 | ret = vidioc_try_fmt(f); | |
575 | if (ret) | |
576 | return ret; | |
577 | ||
578 | q_data->fmt = find_format(f); | |
579 | q_data->width = f->fmt.pix.width; | |
580 | q_data->height = f->fmt.pix.height; | |
581 | if (q_data->fmt->fourcc == V4L2_PIX_FMT_YUV420) | |
582 | q_data->sizeimage = q_data->width * q_data->height * 3 / 2; | |
583 | else /* YUYV */ | |
584 | q_data->sizeimage = q_data->width * q_data->height * 2; | |
585 | ||
586 | dprintk(ctx->dev, | |
587 | "Setting format for type %d, wxh: %dx%d, fmt: %d\n", | |
588 | f->type, q_data->width, q_data->height, q_data->fmt->fourcc); | |
589 | ||
590 | return 0; | |
591 | } | |
592 | ||
593 | static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, | |
594 | struct v4l2_format *f) | |
595 | { | |
596 | int ret; | |
597 | ||
598 | ret = vidioc_try_fmt_vid_cap(file, priv, f); | |
599 | if (ret) | |
600 | return ret; | |
601 | ||
602 | return vidioc_s_fmt(priv, f); | |
603 | } | |
604 | ||
605 | static int vidioc_s_fmt_vid_out(struct file *file, void *priv, | |
606 | struct v4l2_format *f) | |
607 | { | |
608 | int ret; | |
609 | ||
610 | ret = vidioc_try_fmt_vid_out(file, priv, f); | |
611 | if (ret) | |
612 | return ret; | |
613 | ||
614 | return vidioc_s_fmt(priv, f); | |
615 | } | |
616 | ||
617 | static int vidioc_reqbufs(struct file *file, void *priv, | |
618 | struct v4l2_requestbuffers *reqbufs) | |
619 | { | |
620 | struct emmaprp_ctx *ctx = priv; | |
621 | ||
622 | return v4l2_m2m_reqbufs(file, ctx->m2m_ctx, reqbufs); | |
623 | } | |
624 | ||
625 | static int vidioc_querybuf(struct file *file, void *priv, | |
626 | struct v4l2_buffer *buf) | |
627 | { | |
628 | struct emmaprp_ctx *ctx = priv; | |
629 | ||
630 | return v4l2_m2m_querybuf(file, ctx->m2m_ctx, buf); | |
631 | } | |
632 | ||
633 | static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf) | |
634 | { | |
635 | struct emmaprp_ctx *ctx = priv; | |
636 | ||
637 | return v4l2_m2m_qbuf(file, ctx->m2m_ctx, buf); | |
638 | } | |
639 | ||
640 | static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf) | |
641 | { | |
642 | struct emmaprp_ctx *ctx = priv; | |
643 | ||
644 | return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf); | |
645 | } | |
646 | ||
647 | static int vidioc_streamon(struct file *file, void *priv, | |
648 | enum v4l2_buf_type type) | |
649 | { | |
650 | struct emmaprp_ctx *ctx = priv; | |
651 | ||
652 | return v4l2_m2m_streamon(file, ctx->m2m_ctx, type); | |
653 | } | |
654 | ||
655 | static int vidioc_streamoff(struct file *file, void *priv, | |
656 | enum v4l2_buf_type type) | |
657 | { | |
658 | struct emmaprp_ctx *ctx = priv; | |
659 | ||
660 | return v4l2_m2m_streamoff(file, ctx->m2m_ctx, type); | |
661 | } | |
662 | ||
663 | static const struct v4l2_ioctl_ops emmaprp_ioctl_ops = { | |
664 | .vidioc_querycap = vidioc_querycap, | |
665 | ||
666 | .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, | |
667 | .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, | |
668 | .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, | |
669 | .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, | |
670 | ||
671 | .vidioc_enum_fmt_vid_out = vidioc_enum_fmt_vid_out, | |
672 | .vidioc_g_fmt_vid_out = vidioc_g_fmt_vid_out, | |
673 | .vidioc_try_fmt_vid_out = vidioc_try_fmt_vid_out, | |
674 | .vidioc_s_fmt_vid_out = vidioc_s_fmt_vid_out, | |
675 | ||
676 | .vidioc_reqbufs = vidioc_reqbufs, | |
677 | .vidioc_querybuf = vidioc_querybuf, | |
678 | ||
679 | .vidioc_qbuf = vidioc_qbuf, | |
680 | .vidioc_dqbuf = vidioc_dqbuf, | |
681 | ||
682 | .vidioc_streamon = vidioc_streamon, | |
683 | .vidioc_streamoff = vidioc_streamoff, | |
684 | }; | |
685 | ||
686 | ||
687 | /* | |
688 | * Queue operations | |
689 | */ | |
690 | static int emmaprp_queue_setup(struct vb2_queue *vq, | |
691 | const struct v4l2_format *fmt, | |
692 | unsigned int *nbuffers, unsigned int *nplanes, | |
693 | unsigned int sizes[], void *alloc_ctxs[]) | |
694 | { | |
695 | struct emmaprp_ctx *ctx = vb2_get_drv_priv(vq); | |
696 | struct emmaprp_q_data *q_data; | |
697 | unsigned int size, count = *nbuffers; | |
698 | ||
699 | q_data = get_q_data(ctx, vq->type); | |
700 | ||
701 | if (q_data->fmt->fourcc == V4L2_PIX_FMT_YUV420) | |
702 | size = q_data->width * q_data->height * 3 / 2; | |
703 | else | |
704 | size = q_data->width * q_data->height * 2; | |
705 | ||
706 | while (size * count > MEM2MEM_VID_MEM_LIMIT) | |
707 | (count)--; | |
708 | ||
709 | *nplanes = 1; | |
710 | *nbuffers = count; | |
711 | sizes[0] = size; | |
712 | ||
713 | alloc_ctxs[0] = ctx->dev->alloc_ctx; | |
714 | ||
715 | dprintk(ctx->dev, "get %d buffer(s) of size %d each.\n", count, size); | |
716 | ||
717 | return 0; | |
718 | } | |
719 | ||
720 | static int emmaprp_buf_prepare(struct vb2_buffer *vb) | |
721 | { | |
722 | struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); | |
723 | struct emmaprp_q_data *q_data; | |
724 | ||
725 | dprintk(ctx->dev, "type: %d\n", vb->vb2_queue->type); | |
726 | ||
727 | q_data = get_q_data(ctx, vb->vb2_queue->type); | |
728 | ||
729 | if (vb2_plane_size(vb, 0) < q_data->sizeimage) { | |
730 | dprintk(ctx->dev, "%s data will not fit into plane" | |
731 | "(%lu < %lu)\n", __func__, | |
732 | vb2_plane_size(vb, 0), | |
733 | (long)q_data->sizeimage); | |
734 | return -EINVAL; | |
735 | } | |
736 | ||
737 | vb2_set_plane_payload(vb, 0, q_data->sizeimage); | |
738 | ||
739 | return 0; | |
740 | } | |
741 | ||
742 | static void emmaprp_buf_queue(struct vb2_buffer *vb) | |
743 | { | |
744 | struct emmaprp_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue); | |
745 | v4l2_m2m_buf_queue(ctx->m2m_ctx, vb); | |
746 | } | |
747 | ||
748 | static struct vb2_ops emmaprp_qops = { | |
749 | .queue_setup = emmaprp_queue_setup, | |
750 | .buf_prepare = emmaprp_buf_prepare, | |
751 | .buf_queue = emmaprp_buf_queue, | |
752 | }; | |
753 | ||
754 | static int queue_init(void *priv, struct vb2_queue *src_vq, | |
755 | struct vb2_queue *dst_vq) | |
756 | { | |
757 | struct emmaprp_ctx *ctx = priv; | |
758 | int ret; | |
759 | ||
760 | memset(src_vq, 0, sizeof(*src_vq)); | |
761 | src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; | |
28638601 | 762 | src_vq->io_modes = VB2_MMAP | VB2_USERPTR; |
8091cb7d JM |
763 | src_vq->drv_priv = ctx; |
764 | src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); | |
765 | src_vq->ops = &emmaprp_qops; | |
766 | src_vq->mem_ops = &vb2_dma_contig_memops; | |
767 | ||
768 | ret = vb2_queue_init(src_vq); | |
769 | if (ret) | |
770 | return ret; | |
771 | ||
772 | memset(dst_vq, 0, sizeof(*dst_vq)); | |
773 | dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
28638601 | 774 | dst_vq->io_modes = VB2_MMAP | VB2_USERPTR; |
8091cb7d JM |
775 | dst_vq->drv_priv = ctx; |
776 | dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer); | |
777 | dst_vq->ops = &emmaprp_qops; | |
778 | dst_vq->mem_ops = &vb2_dma_contig_memops; | |
779 | ||
780 | return vb2_queue_init(dst_vq); | |
781 | } | |
782 | ||
783 | /* | |
784 | * File operations | |
785 | */ | |
786 | static int emmaprp_open(struct file *file) | |
787 | { | |
788 | struct emmaprp_dev *pcdev = video_drvdata(file); | |
789 | struct emmaprp_ctx *ctx; | |
790 | ||
791 | ctx = kzalloc(sizeof *ctx, GFP_KERNEL); | |
792 | if (!ctx) | |
793 | return -ENOMEM; | |
794 | ||
795 | file->private_data = ctx; | |
796 | ctx->dev = pcdev; | |
797 | ||
798 | ctx->m2m_ctx = v4l2_m2m_ctx_init(pcdev->m2m_dev, ctx, &queue_init); | |
799 | ||
800 | if (IS_ERR(ctx->m2m_ctx)) { | |
801 | int ret = PTR_ERR(ctx->m2m_ctx); | |
802 | ||
803 | kfree(ctx); | |
804 | return ret; | |
805 | } | |
806 | ||
807 | clk_enable(pcdev->clk_emma); | |
808 | ctx->q_data[V4L2_M2M_SRC].fmt = &formats[1]; | |
809 | ctx->q_data[V4L2_M2M_DST].fmt = &formats[0]; | |
810 | ||
811 | dprintk(pcdev, "Created instance %p, m2m_ctx: %p\n", ctx, ctx->m2m_ctx); | |
812 | ||
813 | return 0; | |
814 | } | |
815 | ||
816 | static int emmaprp_release(struct file *file) | |
817 | { | |
818 | struct emmaprp_dev *pcdev = video_drvdata(file); | |
819 | struct emmaprp_ctx *ctx = file->private_data; | |
820 | ||
821 | dprintk(pcdev, "Releasing instance %p\n", ctx); | |
822 | ||
823 | clk_disable(pcdev->clk_emma); | |
824 | v4l2_m2m_ctx_release(ctx->m2m_ctx); | |
825 | kfree(ctx); | |
826 | ||
827 | return 0; | |
828 | } | |
829 | ||
830 | static unsigned int emmaprp_poll(struct file *file, | |
831 | struct poll_table_struct *wait) | |
832 | { | |
833 | struct emmaprp_ctx *ctx = file->private_data; | |
834 | ||
835 | return v4l2_m2m_poll(file, ctx->m2m_ctx, wait); | |
836 | } | |
837 | ||
838 | static int emmaprp_mmap(struct file *file, struct vm_area_struct *vma) | |
839 | { | |
840 | struct emmaprp_ctx *ctx = file->private_data; | |
841 | ||
842 | return v4l2_m2m_mmap(file, ctx->m2m_ctx, vma); | |
843 | } | |
844 | ||
845 | static const struct v4l2_file_operations emmaprp_fops = { | |
846 | .owner = THIS_MODULE, | |
847 | .open = emmaprp_open, | |
848 | .release = emmaprp_release, | |
849 | .poll = emmaprp_poll, | |
850 | .unlocked_ioctl = video_ioctl2, | |
851 | .mmap = emmaprp_mmap, | |
852 | }; | |
853 | ||
854 | static struct video_device emmaprp_videodev = { | |
855 | .name = MEM2MEM_NAME, | |
856 | .fops = &emmaprp_fops, | |
857 | .ioctl_ops = &emmaprp_ioctl_ops, | |
858 | .minor = -1, | |
859 | .release = video_device_release, | |
860 | }; | |
861 | ||
862 | static struct v4l2_m2m_ops m2m_ops = { | |
863 | .device_run = emmaprp_device_run, | |
864 | .job_abort = emmaprp_job_abort, | |
865 | .lock = emmaprp_lock, | |
866 | .unlock = emmaprp_unlock, | |
867 | }; | |
868 | ||
869 | static int emmaprp_probe(struct platform_device *pdev) | |
870 | { | |
871 | struct emmaprp_dev *pcdev; | |
872 | struct video_device *vfd; | |
873 | struct resource *res_emma; | |
874 | int irq_emma; | |
875 | int ret; | |
876 | ||
877 | pcdev = kzalloc(sizeof *pcdev, GFP_KERNEL); | |
878 | if (!pcdev) | |
879 | return -ENOMEM; | |
880 | ||
881 | spin_lock_init(&pcdev->irqlock); | |
882 | ||
883 | pcdev->clk_emma = clk_get(&pdev->dev, NULL); | |
884 | if (IS_ERR(pcdev->clk_emma)) { | |
885 | ret = PTR_ERR(pcdev->clk_emma); | |
886 | goto free_dev; | |
887 | } | |
888 | ||
889 | irq_emma = platform_get_irq(pdev, 0); | |
890 | res_emma = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
891 | if (irq_emma < 0 || res_emma == NULL) { | |
892 | dev_err(&pdev->dev, "Missing platform resources data\n"); | |
893 | ret = -ENODEV; | |
894 | goto free_clk; | |
895 | } | |
896 | ||
897 | ret = v4l2_device_register(&pdev->dev, &pcdev->v4l2_dev); | |
898 | if (ret) | |
899 | goto free_clk; | |
900 | ||
901 | mutex_init(&pcdev->dev_mutex); | |
902 | ||
903 | vfd = video_device_alloc(); | |
904 | if (!vfd) { | |
905 | v4l2_err(&pcdev->v4l2_dev, "Failed to allocate video device\n"); | |
906 | ret = -ENOMEM; | |
907 | goto unreg_dev; | |
908 | } | |
909 | ||
910 | *vfd = emmaprp_videodev; | |
5126f259 HV |
911 | /* Locking in file operations other than ioctl should be done |
912 | by the driver, not the V4L2 core. | |
913 | This driver needs auditing so that this flag can be removed. */ | |
914 | set_bit(V4L2_FL_LOCK_ALL_FOPS, &vfd->flags); | |
8091cb7d JM |
915 | vfd->lock = &pcdev->dev_mutex; |
916 | ||
917 | video_set_drvdata(vfd, pcdev); | |
918 | snprintf(vfd->name, sizeof(vfd->name), "%s", emmaprp_videodev.name); | |
919 | pcdev->vfd = vfd; | |
920 | v4l2_info(&pcdev->v4l2_dev, EMMAPRP_MODULE_NAME | |
921 | " Device registered as /dev/video%d\n", vfd->num); | |
922 | ||
923 | platform_set_drvdata(pdev, pcdev); | |
924 | ||
925 | if (devm_request_mem_region(&pdev->dev, res_emma->start, | |
926 | resource_size(res_emma), MEM2MEM_NAME) == NULL) | |
927 | goto rel_vdev; | |
928 | ||
929 | pcdev->base_emma = devm_ioremap(&pdev->dev, res_emma->start, | |
930 | resource_size(res_emma)); | |
931 | if (!pcdev->base_emma) | |
932 | goto rel_vdev; | |
933 | ||
934 | pcdev->irq_emma = irq_emma; | |
935 | pcdev->res_emma = res_emma; | |
936 | ||
937 | if (devm_request_irq(&pdev->dev, pcdev->irq_emma, emmaprp_irq, | |
938 | 0, MEM2MEM_NAME, pcdev) < 0) | |
939 | goto rel_vdev; | |
940 | ||
941 | pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev); | |
942 | if (IS_ERR(pcdev->alloc_ctx)) { | |
943 | v4l2_err(&pcdev->v4l2_dev, "Failed to alloc vb2 context\n"); | |
944 | ret = PTR_ERR(pcdev->alloc_ctx); | |
945 | goto rel_vdev; | |
946 | } | |
947 | ||
948 | pcdev->m2m_dev = v4l2_m2m_init(&m2m_ops); | |
949 | if (IS_ERR(pcdev->m2m_dev)) { | |
950 | v4l2_err(&pcdev->v4l2_dev, "Failed to init mem2mem device\n"); | |
951 | ret = PTR_ERR(pcdev->m2m_dev); | |
952 | goto rel_ctx; | |
953 | } | |
954 | ||
955 | ret = video_register_device(vfd, VFL_TYPE_GRABBER, 0); | |
956 | if (ret) { | |
957 | v4l2_err(&pcdev->v4l2_dev, "Failed to register video device\n"); | |
958 | goto rel_m2m; | |
959 | } | |
960 | ||
961 | return 0; | |
962 | ||
963 | ||
964 | rel_m2m: | |
965 | v4l2_m2m_release(pcdev->m2m_dev); | |
966 | rel_ctx: | |
967 | vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx); | |
968 | rel_vdev: | |
969 | video_device_release(vfd); | |
970 | unreg_dev: | |
971 | v4l2_device_unregister(&pcdev->v4l2_dev); | |
972 | free_clk: | |
973 | clk_put(pcdev->clk_emma); | |
974 | free_dev: | |
975 | kfree(pcdev); | |
976 | ||
977 | return ret; | |
978 | } | |
979 | ||
980 | static int emmaprp_remove(struct platform_device *pdev) | |
981 | { | |
982 | struct emmaprp_dev *pcdev = platform_get_drvdata(pdev); | |
983 | ||
984 | v4l2_info(&pcdev->v4l2_dev, "Removing " EMMAPRP_MODULE_NAME); | |
985 | ||
986 | video_unregister_device(pcdev->vfd); | |
987 | v4l2_m2m_release(pcdev->m2m_dev); | |
988 | vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx); | |
989 | v4l2_device_unregister(&pcdev->v4l2_dev); | |
990 | clk_put(pcdev->clk_emma); | |
991 | kfree(pcdev); | |
992 | ||
993 | return 0; | |
994 | } | |
995 | ||
996 | static struct platform_driver emmaprp_pdrv = { | |
997 | .probe = emmaprp_probe, | |
998 | .remove = emmaprp_remove, | |
999 | .driver = { | |
1000 | .name = MEM2MEM_NAME, | |
1001 | .owner = THIS_MODULE, | |
1002 | }, | |
1003 | }; | |
1004 | ||
1005 | static void __exit emmaprp_exit(void) | |
1006 | { | |
1007 | platform_driver_unregister(&emmaprp_pdrv); | |
1008 | } | |
1009 | ||
1010 | static int __init emmaprp_init(void) | |
1011 | { | |
1012 | return platform_driver_register(&emmaprp_pdrv); | |
1013 | } | |
1014 | ||
1015 | module_init(emmaprp_init); | |
1016 | module_exit(emmaprp_exit); |