+++ /dev/null
-/*
- * Virtual Video driver - This code emulates a real video device with v4l2 api
- *
- * Copyright (c) 2006 by:
- * Mauro Carvalho Chehab <mchehab--a.t--infradead.org>
- * Ted Walther <ted--a.t--enumera.com>
- * John Sokol <sokol--a.t--videotechnology.com>
- * http://v4l.videotechnology.com/
- *
- * Conversion to videobuf2 by Pawel Osciak & Marek Szyprowski
- * Copyright (c) 2010 Samsung Electronics
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the BSD Licence, GNU General Public License
- * as published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version
- */
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/slab.h>
-#include <linux/font.h>
-#include <linux/mutex.h>
-#include <linux/videodev2.h>
-#include <linux/kthread.h>
-#include <linux/freezer.h>
-#include <media/videobuf2-vmalloc.h>
-#include <media/v4l2-device.h>
-#include <media/v4l2-ioctl.h>
-#include <media/v4l2-ctrls.h>
-#include <media/v4l2-fh.h>
-#include <media/v4l2-event.h>
-#include <media/v4l2-common.h>
-
-#define VIVI_MODULE_NAME "vivi"
-
-/* Maximum allowed frame rate
- *
- * Vivi will allow setting timeperframe in [1/FPS_MAX - FPS_MAX/1] range.
- *
- * Ideally FPS_MAX should be infinity, i.e. practically UINT_MAX, but that
- * might hit application errors when they manipulate these values.
- *
- * Besides, for tpf < 1ms image-generation logic should be changed, to avoid
- * producing frames with equal content.
- */
-#define FPS_MAX 1000
-
-#define MAX_WIDTH 1920
-#define MAX_HEIGHT 1200
-
-#define VIVI_VERSION "0.8.1"
-
-MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board");
-MODULE_AUTHOR("Mauro Carvalho Chehab, Ted Walther and John Sokol");
-MODULE_LICENSE("Dual BSD/GPL");
-MODULE_VERSION(VIVI_VERSION);
-
-static unsigned video_nr = -1;
-module_param(video_nr, uint, 0644);
-MODULE_PARM_DESC(video_nr, "videoX start number, -1 is autodetect");
-
-static unsigned n_devs = 1;
-module_param(n_devs, uint, 0644);
-MODULE_PARM_DESC(n_devs, "number of video devices to create");
-
-static unsigned debug;
-module_param(debug, uint, 0644);
-MODULE_PARM_DESC(debug, "activates debug info");
-
-/* Global font descriptor */
-static const u8 *font8x16;
-
-/* timeperframe: min/max and default */
-static const struct v4l2_fract
- tpf_min = {.numerator = 1, .denominator = FPS_MAX},
- tpf_max = {.numerator = FPS_MAX, .denominator = 1},
- tpf_default = {.numerator = 1001, .denominator = 30000}; /* NTSC */
-
-#define dprintk(dev, level, fmt, arg...) \
- v4l2_dbg(level, debug, &dev->v4l2_dev, fmt, ## arg)
-
-/* ------------------------------------------------------------------
- Basic structures
- ------------------------------------------------------------------*/
-
-struct vivi_fmt {
- const char *name;
- u32 fourcc; /* v4l2 format id */
- u8 depth;
- bool is_yuv;
-};
-
-static const struct vivi_fmt formats[] = {
- {
- .name = "4:2:2, packed, YUYV",
- .fourcc = V4L2_PIX_FMT_YUYV,
- .depth = 16,
- .is_yuv = true,
- },
- {
- .name = "4:2:2, packed, UYVY",
- .fourcc = V4L2_PIX_FMT_UYVY,
- .depth = 16,
- .is_yuv = true,
- },
- {
- .name = "4:2:2, packed, YVYU",
- .fourcc = V4L2_PIX_FMT_YVYU,
- .depth = 16,
- .is_yuv = true,
- },
- {
- .name = "4:2:2, packed, VYUY",
- .fourcc = V4L2_PIX_FMT_VYUY,
- .depth = 16,
- .is_yuv = true,
- },
- {
- .name = "RGB565 (LE)",
- .fourcc = V4L2_PIX_FMT_RGB565, /* gggbbbbb rrrrrggg */
- .depth = 16,
- },
- {
- .name = "RGB565 (BE)",
- .fourcc = V4L2_PIX_FMT_RGB565X, /* rrrrrggg gggbbbbb */
- .depth = 16,
- },
- {
- .name = "RGB555 (LE)",
- .fourcc = V4L2_PIX_FMT_RGB555, /* gggbbbbb arrrrrgg */
- .depth = 16,
- },
- {
- .name = "RGB555 (BE)",
- .fourcc = V4L2_PIX_FMT_RGB555X, /* arrrrrgg gggbbbbb */
- .depth = 16,
- },
- {
- .name = "RGB24 (LE)",
- .fourcc = V4L2_PIX_FMT_RGB24, /* rgb */
- .depth = 24,
- },
- {
- .name = "RGB24 (BE)",
- .fourcc = V4L2_PIX_FMT_BGR24, /* bgr */
- .depth = 24,
- },
- {
- .name = "RGB32 (LE)",
- .fourcc = V4L2_PIX_FMT_RGB32, /* argb */
- .depth = 32,
- },
- {
- .name = "RGB32 (BE)",
- .fourcc = V4L2_PIX_FMT_BGR32, /* bgra */
- .depth = 32,
- },
-};
-
-static const struct vivi_fmt *__get_format(u32 pixelformat)
-{
- const struct vivi_fmt *fmt;
- unsigned int k;
-
- for (k = 0; k < ARRAY_SIZE(formats); k++) {
- fmt = &formats[k];
- if (fmt->fourcc == pixelformat)
- break;
- }
-
- if (k == ARRAY_SIZE(formats))
- return NULL;
-
- return &formats[k];
-}
-
-static const struct vivi_fmt *get_format(struct v4l2_format *f)
-{
- return __get_format(f->fmt.pix.pixelformat);
-}
-
-/* buffer for one video frame */
-struct vivi_buffer {
- /* common v4l buffer stuff -- must be first */
- struct vb2_buffer vb;
- struct list_head list;
-};
-
-struct vivi_dmaqueue {
- struct list_head active;
-
- /* thread for generating video stream*/
- struct task_struct *kthread;
- wait_queue_head_t wq;
- /* Counters to control fps rate */
- int frame;
- int ini_jiffies;
-};
-
-static LIST_HEAD(vivi_devlist);
-
-struct vivi_dev {
- struct list_head vivi_devlist;
- struct v4l2_device v4l2_dev;
- struct v4l2_ctrl_handler ctrl_handler;
- struct video_device vdev;
-
- /* controls */
- struct v4l2_ctrl *brightness;
- struct v4l2_ctrl *contrast;
- struct v4l2_ctrl *saturation;
- struct v4l2_ctrl *hue;
- struct {
- /* autogain/gain cluster */
- struct v4l2_ctrl *autogain;
- struct v4l2_ctrl *gain;
- };
- struct v4l2_ctrl *volume;
- struct v4l2_ctrl *alpha;
- struct v4l2_ctrl *button;
- struct v4l2_ctrl *boolean;
- struct v4l2_ctrl *int32;
- struct v4l2_ctrl *int64;
- struct v4l2_ctrl *menu;
- struct v4l2_ctrl *string;
- struct v4l2_ctrl *bitmask;
- struct v4l2_ctrl *int_menu;
-
- spinlock_t slock;
- struct mutex mutex;
-
- struct vivi_dmaqueue vidq;
-
- /* Several counters */
- unsigned ms;
- unsigned long jiffies;
- unsigned button_pressed;
-
- int mv_count; /* Controls bars movement */
-
- /* Input Number */
- int input;
-
- /* video capture */
- const struct vivi_fmt *fmt;
- struct v4l2_fract timeperframe;
- unsigned int width, height;
- struct vb2_queue vb_vidq;
- unsigned int seq_count;
-
- u8 bars[9][3];
- u8 line[MAX_WIDTH * 8] __attribute__((__aligned__(4)));
- unsigned int pixelsize;
- u8 alpha_component;
- u32 textfg, textbg;
-};
-
-/* ------------------------------------------------------------------
- DMA and thread functions
- ------------------------------------------------------------------*/
-
-/* Bars and Colors should match positions */
-
-enum colors {
- WHITE,
- AMBER,
- CYAN,
- GREEN,
- MAGENTA,
- RED,
- BLUE,
- BLACK,
- TEXT_BLACK,
-};
-
-/* R G B */
-#define COLOR_WHITE {204, 204, 204}
-#define COLOR_AMBER {208, 208, 0}
-#define COLOR_CYAN { 0, 206, 206}
-#define COLOR_GREEN { 0, 239, 0}
-#define COLOR_MAGENTA {239, 0, 239}
-#define COLOR_RED {205, 0, 0}
-#define COLOR_BLUE { 0, 0, 255}
-#define COLOR_BLACK { 0, 0, 0}
-
-struct bar_std {
- u8 bar[9][3];
-};
-
-/* Maximum number of bars are 10 - otherwise, the input print code
- should be modified */
-static const struct bar_std bars[] = {
- { /* Standard ITU-R color bar sequence */
- { COLOR_WHITE, COLOR_AMBER, COLOR_CYAN, COLOR_GREEN,
- COLOR_MAGENTA, COLOR_RED, COLOR_BLUE, COLOR_BLACK, COLOR_BLACK }
- }, {
- { COLOR_WHITE, COLOR_AMBER, COLOR_BLACK, COLOR_WHITE,
- COLOR_AMBER, COLOR_BLACK, COLOR_WHITE, COLOR_AMBER, COLOR_BLACK }
- }, {
- { COLOR_WHITE, COLOR_CYAN, COLOR_BLACK, COLOR_WHITE,
- COLOR_CYAN, COLOR_BLACK, COLOR_WHITE, COLOR_CYAN, COLOR_BLACK }
- }, {
- { COLOR_WHITE, COLOR_GREEN, COLOR_BLACK, COLOR_WHITE,
- COLOR_GREEN, COLOR_BLACK, COLOR_WHITE, COLOR_GREEN, COLOR_BLACK }
- },
-};
-
-#define NUM_INPUTS ARRAY_SIZE(bars)
-
-#define TO_Y(r, g, b) \
- (((16829 * r + 33039 * g + 6416 * b + 32768) >> 16) + 16)
-/* RGB to V(Cr) Color transform */
-#define TO_V(r, g, b) \
- (((28784 * r - 24103 * g - 4681 * b + 32768) >> 16) + 128)
-/* RGB to U(Cb) Color transform */
-#define TO_U(r, g, b) \
- (((-9714 * r - 19070 * g + 28784 * b + 32768) >> 16) + 128)
-
-/* precalculate color bar values to speed up rendering */
-static void precalculate_bars(struct vivi_dev *dev)
-{
- u8 r, g, b;
- int k, is_yuv;
-
- for (k = 0; k < 9; k++) {
- r = bars[dev->input].bar[k][0];
- g = bars[dev->input].bar[k][1];
- b = bars[dev->input].bar[k][2];
- is_yuv = dev->fmt->is_yuv;
-
- switch (dev->fmt->fourcc) {
- case V4L2_PIX_FMT_RGB565:
- case V4L2_PIX_FMT_RGB565X:
- r >>= 3;
- g >>= 2;
- b >>= 3;
- break;
- case V4L2_PIX_FMT_RGB555:
- case V4L2_PIX_FMT_RGB555X:
- r >>= 3;
- g >>= 3;
- b >>= 3;
- break;
- case V4L2_PIX_FMT_YUYV:
- case V4L2_PIX_FMT_UYVY:
- case V4L2_PIX_FMT_YVYU:
- case V4L2_PIX_FMT_VYUY:
- case V4L2_PIX_FMT_RGB24:
- case V4L2_PIX_FMT_BGR24:
- case V4L2_PIX_FMT_RGB32:
- case V4L2_PIX_FMT_BGR32:
- break;
- }
-
- if (is_yuv) {
- dev->bars[k][0] = TO_Y(r, g, b); /* Luma */
- dev->bars[k][1] = TO_U(r, g, b); /* Cb */
- dev->bars[k][2] = TO_V(r, g, b); /* Cr */
- } else {
- dev->bars[k][0] = r;
- dev->bars[k][1] = g;
- dev->bars[k][2] = b;
- }
- }
-}
-
-/* 'odd' is true for pixels 1, 3, 5, etc. and false for pixels 0, 2, 4, etc. */
-static void gen_twopix(struct vivi_dev *dev, u8 *buf, int colorpos, bool odd)
-{
- u8 r_y, g_u, b_v;
- u8 alpha = dev->alpha_component;
- int color;
- u8 *p;
-
- r_y = dev->bars[colorpos][0]; /* R or precalculated Y */
- g_u = dev->bars[colorpos][1]; /* G or precalculated U */
- b_v = dev->bars[colorpos][2]; /* B or precalculated V */
-
- for (color = 0; color < dev->pixelsize; color++) {
- p = buf + color;
-
- switch (dev->fmt->fourcc) {
- case V4L2_PIX_FMT_YUYV:
- switch (color) {
- case 0:
- *p = r_y;
- break;
- case 1:
- *p = odd ? b_v : g_u;
- break;
- }
- break;
- case V4L2_PIX_FMT_UYVY:
- switch (color) {
- case 0:
- *p = odd ? b_v : g_u;
- break;
- case 1:
- *p = r_y;
- break;
- }
- break;
- case V4L2_PIX_FMT_YVYU:
- switch (color) {
- case 0:
- *p = r_y;
- break;
- case 1:
- *p = odd ? g_u : b_v;
- break;
- }
- break;
- case V4L2_PIX_FMT_VYUY:
- switch (color) {
- case 0:
- *p = odd ? g_u : b_v;
- break;
- case 1:
- *p = r_y;
- break;
- }
- break;
- case V4L2_PIX_FMT_RGB565:
- switch (color) {
- case 0:
- *p = (g_u << 5) | b_v;
- break;
- case 1:
- *p = (r_y << 3) | (g_u >> 3);
- break;
- }
- break;
- case V4L2_PIX_FMT_RGB565X:
- switch (color) {
- case 0:
- *p = (r_y << 3) | (g_u >> 3);
- break;
- case 1:
- *p = (g_u << 5) | b_v;
- break;
- }
- break;
- case V4L2_PIX_FMT_RGB555:
- switch (color) {
- case 0:
- *p = (g_u << 5) | b_v;
- break;
- case 1:
- *p = (alpha & 0x80) | (r_y << 2) | (g_u >> 3);
- break;
- }
- break;
- case V4L2_PIX_FMT_RGB555X:
- switch (color) {
- case 0:
- *p = (alpha & 0x80) | (r_y << 2) | (g_u >> 3);
- break;
- case 1:
- *p = (g_u << 5) | b_v;
- break;
- }
- break;
- case V4L2_PIX_FMT_RGB24:
- switch (color) {
- case 0:
- *p = r_y;
- break;
- case 1:
- *p = g_u;
- break;
- case 2:
- *p = b_v;
- break;
- }
- break;
- case V4L2_PIX_FMT_BGR24:
- switch (color) {
- case 0:
- *p = b_v;
- break;
- case 1:
- *p = g_u;
- break;
- case 2:
- *p = r_y;
- break;
- }
- break;
- case V4L2_PIX_FMT_RGB32:
- switch (color) {
- case 0:
- *p = alpha;
- break;
- case 1:
- *p = r_y;
- break;
- case 2:
- *p = g_u;
- break;
- case 3:
- *p = b_v;
- break;
- }
- break;
- case V4L2_PIX_FMT_BGR32:
- switch (color) {
- case 0:
- *p = b_v;
- break;
- case 1:
- *p = g_u;
- break;
- case 2:
- *p = r_y;
- break;
- case 3:
- *p = alpha;
- break;
- }
- break;
- }
- }
-}
-
-static void precalculate_line(struct vivi_dev *dev)
-{
- unsigned pixsize = dev->pixelsize;
- unsigned pixsize2 = 2*pixsize;
- int colorpos;
- u8 *pos;
-
- for (colorpos = 0; colorpos < 16; ++colorpos) {
- u8 pix[8];
- int wstart = colorpos * dev->width / 8;
- int wend = (colorpos+1) * dev->width / 8;
- int w;
-
- gen_twopix(dev, &pix[0], colorpos % 8, 0);
- gen_twopix(dev, &pix[pixsize], colorpos % 8, 1);
-
- for (w = wstart/2*2, pos = dev->line + w*pixsize; w < wend; w += 2, pos += pixsize2)
- memcpy(pos, pix, pixsize2);
- }
-}
-
-/* need this to do rgb24 rendering */
-typedef struct { u16 __; u8 _; } __attribute__((packed)) x24;
-
-static void gen_text(struct vivi_dev *dev, char *basep,
- int y, int x, char *text)
-{
- int line;
- unsigned int width = dev->width;
-
- /* Checks if it is possible to show string */
- if (y + 16 >= dev->height || x + strlen(text) * 8 >= width)
- return;
-
- /* Print stream time */
-#define PRINTSTR(PIXTYPE) do { \
- PIXTYPE fg; \
- PIXTYPE bg; \
- memcpy(&fg, &dev->textfg, sizeof(PIXTYPE)); \
- memcpy(&bg, &dev->textbg, sizeof(PIXTYPE)); \
- \
- for (line = 0; line < 16; line++) { \
- PIXTYPE *pos = (PIXTYPE *)( basep + ((y + line) * width + x) * sizeof(PIXTYPE) ); \
- u8 *s; \
- \
- for (s = text; *s; s++) { \
- u8 chr = font8x16[*s * 16 + line]; \
- \
- pos[0] = (chr & (0x01 << 7) ? fg : bg); \
- pos[1] = (chr & (0x01 << 6) ? fg : bg); \
- pos[2] = (chr & (0x01 << 5) ? fg : bg); \
- pos[3] = (chr & (0x01 << 4) ? fg : bg); \
- pos[4] = (chr & (0x01 << 3) ? fg : bg); \
- pos[5] = (chr & (0x01 << 2) ? fg : bg); \
- pos[6] = (chr & (0x01 << 1) ? fg : bg); \
- pos[7] = (chr & (0x01 << 0) ? fg : bg); \
- \
- pos += 8; \
- } \
- } \
-} while (0)
-
- switch (dev->pixelsize) {
- case 2:
- PRINTSTR(u16); break;
- case 4:
- PRINTSTR(u32); break;
- case 3:
- PRINTSTR(x24); break;
- }
-}
-
-static void vivi_fillbuff(struct vivi_dev *dev, struct vivi_buffer *buf)
-{
- int stride = dev->width * dev->pixelsize;
- int hmax = dev->height;
- void *vbuf = vb2_plane_vaddr(&buf->vb, 0);
- unsigned ms;
- char str[100];
- int h, line = 1;
- u8 *linestart;
- s32 gain;
-
- if (!vbuf)
- return;
-
- linestart = dev->line + (dev->mv_count % dev->width) * dev->pixelsize;
-
- for (h = 0; h < hmax; h++)
- memcpy(vbuf + h * stride, linestart, stride);
-
- /* Updates stream time */
-
- gen_twopix(dev, (u8 *)&dev->textbg, TEXT_BLACK, /*odd=*/ 0);
- gen_twopix(dev, (u8 *)&dev->textfg, WHITE, /*odd=*/ 0);
-
- dev->ms += jiffies_to_msecs(jiffies - dev->jiffies);
- dev->jiffies = jiffies;
- ms = dev->ms;
- snprintf(str, sizeof(str), " %02d:%02d:%02d:%03d ",
- (ms / (60 * 60 * 1000)) % 24,
- (ms / (60 * 1000)) % 60,
- (ms / 1000) % 60,
- ms % 1000);
- gen_text(dev, vbuf, line++ * 16, 16, str);
- snprintf(str, sizeof(str), " %dx%d, input %d ",
- dev->width, dev->height, dev->input);
- gen_text(dev, vbuf, line++ * 16, 16, str);
-
- gain = v4l2_ctrl_g_ctrl(dev->gain);
- mutex_lock(dev->ctrl_handler.lock);
- snprintf(str, sizeof(str), " brightness %3d, contrast %3d, saturation %3d, hue %d ",
- dev->brightness->cur.val,
- dev->contrast->cur.val,
- dev->saturation->cur.val,
- dev->hue->cur.val);
- gen_text(dev, vbuf, line++ * 16, 16, str);
- snprintf(str, sizeof(str), " autogain %d, gain %3d, volume %3d, alpha 0x%02x ",
- dev->autogain->cur.val, gain, dev->volume->cur.val,
- dev->alpha->cur.val);
- gen_text(dev, vbuf, line++ * 16, 16, str);
- snprintf(str, sizeof(str), " int32 %d, int64 %lld, bitmask %08x ",
- dev->int32->cur.val,
- *dev->int64->p_cur.p_s64,
- dev->bitmask->cur.val);
- gen_text(dev, vbuf, line++ * 16, 16, str);
- snprintf(str, sizeof(str), " boolean %d, menu %s, string \"%s\" ",
- dev->boolean->cur.val,
- dev->menu->qmenu[dev->menu->cur.val],
- dev->string->p_cur.p_char);
- gen_text(dev, vbuf, line++ * 16, 16, str);
- snprintf(str, sizeof(str), " integer_menu %lld, value %d ",
- dev->int_menu->qmenu_int[dev->int_menu->cur.val],
- dev->int_menu->cur.val);
- gen_text(dev, vbuf, line++ * 16, 16, str);
- mutex_unlock(dev->ctrl_handler.lock);
- if (dev->button_pressed) {
- dev->button_pressed--;
- snprintf(str, sizeof(str), " button pressed!");
- gen_text(dev, vbuf, line++ * 16, 16, str);
- }
-
- dev->mv_count += 2;
-
- buf->vb.v4l2_buf.field = V4L2_FIELD_INTERLACED;
- buf->vb.v4l2_buf.sequence = dev->seq_count++;
- v4l2_get_timestamp(&buf->vb.v4l2_buf.timestamp);
-}
-
-static void vivi_thread_tick(struct vivi_dev *dev)
-{
- struct vivi_dmaqueue *dma_q = &dev->vidq;
- struct vivi_buffer *buf;
- unsigned long flags = 0;
-
- dprintk(dev, 1, "Thread tick\n");
-
- spin_lock_irqsave(&dev->slock, flags);
- if (list_empty(&dma_q->active)) {
- dprintk(dev, 1, "No active queue to serve\n");
- spin_unlock_irqrestore(&dev->slock, flags);
- return;
- }
-
- buf = list_entry(dma_q->active.next, struct vivi_buffer, list);
- list_del(&buf->list);
- spin_unlock_irqrestore(&dev->slock, flags);
-
- v4l2_get_timestamp(&buf->vb.v4l2_buf.timestamp);
-
- /* Fill buffer */
- vivi_fillbuff(dev, buf);
- dprintk(dev, 1, "filled buffer %p\n", buf);
-
- vb2_buffer_done(&buf->vb, VB2_BUF_STATE_DONE);
- dprintk(dev, 2, "[%p/%d] done\n", buf, buf->vb.v4l2_buf.index);
-}
-
-#define frames_to_ms(dev, frames) \
- ((frames * dev->timeperframe.numerator * 1000) / dev->timeperframe.denominator)
-
-static void vivi_sleep(struct vivi_dev *dev)
-{
- struct vivi_dmaqueue *dma_q = &dev->vidq;
- int timeout;
- DECLARE_WAITQUEUE(wait, current);
-
- dprintk(dev, 1, "%s dma_q=0x%08lx\n", __func__,
- (unsigned long)dma_q);
-
- add_wait_queue(&dma_q->wq, &wait);
- if (kthread_should_stop())
- goto stop_task;
-
- /* Calculate time to wake up */
- timeout = msecs_to_jiffies(frames_to_ms(dev, 1));
-
- vivi_thread_tick(dev);
-
- schedule_timeout_interruptible(timeout);
-
-stop_task:
- remove_wait_queue(&dma_q->wq, &wait);
- try_to_freeze();
-}
-
-static int vivi_thread(void *data)
-{
- struct vivi_dev *dev = data;
-
- dprintk(dev, 1, "thread started\n");
-
- set_freezable();
-
- for (;;) {
- vivi_sleep(dev);
-
- if (kthread_should_stop())
- break;
- }
- dprintk(dev, 1, "thread: exit\n");
- return 0;
-}
-
-static int vivi_start_generating(struct vivi_dev *dev)
-{
- struct vivi_dmaqueue *dma_q = &dev->vidq;
-
- dprintk(dev, 1, "%s\n", __func__);
-
- /* Resets frame counters */
- dev->ms = 0;
- dev->mv_count = 0;
- dev->jiffies = jiffies;
-
- dma_q->frame = 0;
- dma_q->ini_jiffies = jiffies;
- dma_q->kthread = kthread_run(vivi_thread, dev, "%s",
- dev->v4l2_dev.name);
-
- if (IS_ERR(dma_q->kthread)) {
- v4l2_err(&dev->v4l2_dev, "kernel_thread() failed\n");
- return PTR_ERR(dma_q->kthread);
- }
- /* Wakes thread */
- wake_up_interruptible(&dma_q->wq);
-
- dprintk(dev, 1, "returning from %s\n", __func__);
- return 0;
-}
-
-static void vivi_stop_generating(struct vivi_dev *dev)
-{
- struct vivi_dmaqueue *dma_q = &dev->vidq;
-
- dprintk(dev, 1, "%s\n", __func__);
-
- /* shutdown control thread */
- if (dma_q->kthread) {
- kthread_stop(dma_q->kthread);
- dma_q->kthread = NULL;
- }
-
- /*
- * Typical driver might need to wait here until dma engine stops.
- * In this case we can abort imiedetly, so it's just a noop.
- */
-
- /* Release all active buffers */
- while (!list_empty(&dma_q->active)) {
- struct vivi_buffer *buf;
- buf = list_entry(dma_q->active.next, struct vivi_buffer, list);
- list_del(&buf->list);
- vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
- dprintk(dev, 2, "[%p/%d] done\n", buf, buf->vb.v4l2_buf.index);
- }
-}
-/* ------------------------------------------------------------------
- Videobuf operations
- ------------------------------------------------------------------*/
-static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
- unsigned int *nbuffers, unsigned int *nplanes,
- unsigned int sizes[], void *alloc_ctxs[])
-{
- struct vivi_dev *dev = vb2_get_drv_priv(vq);
- unsigned long size;
-
- size = dev->width * dev->height * dev->pixelsize;
- if (fmt) {
- if (fmt->fmt.pix.sizeimage < size)
- return -EINVAL;
- size = fmt->fmt.pix.sizeimage;
- /* check against insane over 8K resolution buffers */
- if (size > 7680 * 4320 * dev->pixelsize)
- return -EINVAL;
- }
-
- *nplanes = 1;
-
- sizes[0] = size;
-
- /*
- * videobuf2-vmalloc allocator is context-less so no need to set
- * alloc_ctxs array.
- */
-
- dprintk(dev, 1, "%s, count=%d, size=%ld\n", __func__,
- *nbuffers, size);
-
- return 0;
-}
-
-static int buffer_prepare(struct vb2_buffer *vb)
-{
- struct vivi_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
- struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
- unsigned long size;
-
- dprintk(dev, 1, "%s, field=%d\n", __func__, vb->v4l2_buf.field);
-
- BUG_ON(NULL == dev->fmt);
-
- /*
- * Theses properties only change when queue is idle, see s_fmt.
- * The below checks should not be performed here, on each
- * buffer_prepare (i.e. on each qbuf). Most of the code in this function
- * should thus be moved to buffer_init and s_fmt.
- */
- if (dev->width < 48 || dev->width > MAX_WIDTH ||
- dev->height < 32 || dev->height > MAX_HEIGHT)
- return -EINVAL;
-
- size = dev->width * dev->height * dev->pixelsize;
- if (vb2_plane_size(vb, 0) < size) {
- dprintk(dev, 1, "%s data will not fit into plane (%lu < %lu)\n",
- __func__, vb2_plane_size(vb, 0), size);
- return -EINVAL;
- }
-
- vb2_set_plane_payload(&buf->vb, 0, size);
-
- precalculate_bars(dev);
- precalculate_line(dev);
-
- return 0;
-}
-
-static void buffer_queue(struct vb2_buffer *vb)
-{
- struct vivi_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
- struct vivi_buffer *buf = container_of(vb, struct vivi_buffer, vb);
- struct vivi_dmaqueue *vidq = &dev->vidq;
- unsigned long flags = 0;
-
- dprintk(dev, 1, "%s\n", __func__);
-
- spin_lock_irqsave(&dev->slock, flags);
- list_add_tail(&buf->list, &vidq->active);
- spin_unlock_irqrestore(&dev->slock, flags);
-}
-
-static int start_streaming(struct vb2_queue *vq, unsigned int count)
-{
- struct vivi_dev *dev = vb2_get_drv_priv(vq);
- int err;
-
- dprintk(dev, 1, "%s\n", __func__);
- dev->seq_count = 0;
- err = vivi_start_generating(dev);
- if (err) {
- struct vivi_buffer *buf, *tmp;
-
- list_for_each_entry_safe(buf, tmp, &dev->vidq.active, list) {
- list_del(&buf->list);
- vb2_buffer_done(&buf->vb, VB2_BUF_STATE_QUEUED);
- }
- }
- return err;
-}
-
-/* abort streaming and wait for last buffer */
-static void stop_streaming(struct vb2_queue *vq)
-{
- struct vivi_dev *dev = vb2_get_drv_priv(vq);
- dprintk(dev, 1, "%s\n", __func__);
- vivi_stop_generating(dev);
-}
-
-static void vivi_lock(struct vb2_queue *vq)
-{
- struct vivi_dev *dev = vb2_get_drv_priv(vq);
- mutex_lock(&dev->mutex);
-}
-
-static void vivi_unlock(struct vb2_queue *vq)
-{
- struct vivi_dev *dev = vb2_get_drv_priv(vq);
- mutex_unlock(&dev->mutex);
-}
-
-
-static const struct vb2_ops vivi_video_qops = {
- .queue_setup = queue_setup,
- .buf_prepare = buffer_prepare,
- .buf_queue = buffer_queue,
- .start_streaming = start_streaming,
- .stop_streaming = stop_streaming,
- .wait_prepare = vivi_unlock,
- .wait_finish = vivi_lock,
-};
-
-/* ------------------------------------------------------------------
- IOCTL vidioc handling
- ------------------------------------------------------------------*/
-static int vidioc_querycap(struct file *file, void *priv,
- struct v4l2_capability *cap)
-{
- struct vivi_dev *dev = video_drvdata(file);
-
- strcpy(cap->driver, "vivi");
- strcpy(cap->card, "vivi");
- snprintf(cap->bus_info, sizeof(cap->bus_info),
- "platform:%s", dev->v4l2_dev.name);
- cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING |
- V4L2_CAP_READWRITE;
- cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
- return 0;
-}
-
-static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
- struct v4l2_fmtdesc *f)
-{
- const struct vivi_fmt *fmt;
-
- if (f->index >= ARRAY_SIZE(formats))
- return -EINVAL;
-
- fmt = &formats[f->index];
-
- strlcpy(f->description, fmt->name, sizeof(f->description));
- f->pixelformat = fmt->fourcc;
- return 0;
-}
-
-static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
- struct v4l2_format *f)
-{
- struct vivi_dev *dev = video_drvdata(file);
-
- f->fmt.pix.width = dev->width;
- f->fmt.pix.height = dev->height;
- f->fmt.pix.field = V4L2_FIELD_INTERLACED;
- f->fmt.pix.pixelformat = dev->fmt->fourcc;
- f->fmt.pix.bytesperline =
- (f->fmt.pix.width * dev->fmt->depth) >> 3;
- f->fmt.pix.sizeimage =
- f->fmt.pix.height * f->fmt.pix.bytesperline;
- if (dev->fmt->is_yuv)
- f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
- else
- f->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
- return 0;
-}
-
-static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
- struct v4l2_format *f)
-{
- struct vivi_dev *dev = video_drvdata(file);
- const struct vivi_fmt *fmt;
-
- fmt = get_format(f);
- if (!fmt) {
- dprintk(dev, 1, "Fourcc format (0x%08x) unknown.\n",
- f->fmt.pix.pixelformat);
- f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
- fmt = get_format(f);
- }
-
- f->fmt.pix.field = V4L2_FIELD_INTERLACED;
- v4l_bound_align_image(&f->fmt.pix.width, 48, MAX_WIDTH, 2,
- &f->fmt.pix.height, 32, MAX_HEIGHT, 0, 0);
- f->fmt.pix.bytesperline =
- (f->fmt.pix.width * fmt->depth) >> 3;
- f->fmt.pix.sizeimage =
- f->fmt.pix.height * f->fmt.pix.bytesperline;
- if (fmt->is_yuv)
- f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
- else
- f->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
- return 0;
-}
-
-static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
- struct v4l2_format *f)
-{
- struct vivi_dev *dev = video_drvdata(file);
- struct vb2_queue *q = &dev->vb_vidq;
-
- int ret = vidioc_try_fmt_vid_cap(file, priv, f);
- if (ret < 0)
- return ret;
-
- if (vb2_is_busy(q)) {
- dprintk(dev, 1, "%s device busy\n", __func__);
- return -EBUSY;
- }
-
- dev->fmt = get_format(f);
- dev->pixelsize = dev->fmt->depth / 8;
- dev->width = f->fmt.pix.width;
- dev->height = f->fmt.pix.height;
-
- return 0;
-}
-
-static int vidioc_enum_framesizes(struct file *file, void *fh,
- struct v4l2_frmsizeenum *fsize)
-{
- static const struct v4l2_frmsize_stepwise sizes = {
- 48, MAX_WIDTH, 4,
- 32, MAX_HEIGHT, 1
- };
- int i;
-
- if (fsize->index)
- return -EINVAL;
- for (i = 0; i < ARRAY_SIZE(formats); i++)
- if (formats[i].fourcc == fsize->pixel_format)
- break;
- if (i == ARRAY_SIZE(formats))
- return -EINVAL;
- fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
- fsize->stepwise = sizes;
- return 0;
-}
-
-/* only one input in this sample driver */
-static int vidioc_enum_input(struct file *file, void *priv,
- struct v4l2_input *inp)
-{
- if (inp->index >= NUM_INPUTS)
- return -EINVAL;
-
- inp->type = V4L2_INPUT_TYPE_CAMERA;
- sprintf(inp->name, "Camera %u", inp->index);
- return 0;
-}
-
-static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
-{
- struct vivi_dev *dev = video_drvdata(file);
-
- *i = dev->input;
- return 0;
-}
-
-static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
-{
- struct vivi_dev *dev = video_drvdata(file);
-
- if (i >= NUM_INPUTS)
- return -EINVAL;
-
- if (i == dev->input)
- return 0;
-
- dev->input = i;
- /*
- * Modify the brightness range depending on the input.
- * This makes it easy to use vivi to test if applications can
- * handle control range modifications and is also how this is
- * typically used in practice as different inputs may be hooked
- * up to different receivers with different control ranges.
- */
- v4l2_ctrl_modify_range(dev->brightness,
- 128 * i, 255 + 128 * i, 1, 127 + 128 * i);
- precalculate_bars(dev);
- precalculate_line(dev);
- return 0;
-}
-
-/* timeperframe is arbitrary and continuous */
-static int vidioc_enum_frameintervals(struct file *file, void *priv,
- struct v4l2_frmivalenum *fival)
-{
- const struct vivi_fmt *fmt;
-
- if (fival->index)
- return -EINVAL;
-
- fmt = __get_format(fival->pixel_format);
- if (!fmt)
- return -EINVAL;
-
- /* check for valid width/height */
- if (fival->width < 48 || fival->width > MAX_WIDTH || (fival->width & 3))
- return -EINVAL;
- if (fival->height < 32 || fival->height > MAX_HEIGHT)
- return -EINVAL;
-
- fival->type = V4L2_FRMIVAL_TYPE_CONTINUOUS;
-
- /* fill in stepwise (step=1.0 is required by V4L2 spec) */
- fival->stepwise.min = tpf_min;
- fival->stepwise.max = tpf_max;
- fival->stepwise.step = (struct v4l2_fract) {1, 1};
-
- return 0;
-}
-
-static int vidioc_g_parm(struct file *file, void *priv,
- struct v4l2_streamparm *parm)
-{
- struct vivi_dev *dev = video_drvdata(file);
-
- if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
- return -EINVAL;
-
- parm->parm.capture.capability = V4L2_CAP_TIMEPERFRAME;
- parm->parm.capture.timeperframe = dev->timeperframe;
- parm->parm.capture.readbuffers = 1;
- return 0;
-}
-
-#define FRACT_CMP(a, OP, b) \
- ((u64)(a).numerator * (b).denominator OP (u64)(b).numerator * (a).denominator)
-
-static int vidioc_s_parm(struct file *file, void *priv,
- struct v4l2_streamparm *parm)
-{
- struct vivi_dev *dev = video_drvdata(file);
- struct v4l2_fract tpf;
-
- if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
- return -EINVAL;
-
- tpf = parm->parm.capture.timeperframe;
-
- /* tpf: {*, 0} resets timing; clip to [min, max]*/
- tpf = tpf.denominator ? tpf : tpf_default;
- tpf = FRACT_CMP(tpf, <, tpf_min) ? tpf_min : tpf;
- tpf = FRACT_CMP(tpf, >, tpf_max) ? tpf_max : tpf;
-
- dev->timeperframe = tpf;
- parm->parm.capture.timeperframe = tpf;
- parm->parm.capture.readbuffers = 1;
- return 0;
-}
-
-/* --- controls ---------------------------------------------- */
-
-static int vivi_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
-{
- struct vivi_dev *dev = container_of(ctrl->handler, struct vivi_dev, ctrl_handler);
-
- if (ctrl == dev->autogain)
- dev->gain->val = jiffies & 0xff;
- return 0;
-}
-
-static int vivi_s_ctrl(struct v4l2_ctrl *ctrl)
-{
- struct vivi_dev *dev = container_of(ctrl->handler, struct vivi_dev, ctrl_handler);
-
- switch (ctrl->id) {
- case V4L2_CID_ALPHA_COMPONENT:
- dev->alpha_component = ctrl->val;
- break;
- default:
- if (ctrl == dev->button)
- dev->button_pressed = 30;
- break;
- }
- return 0;
-}
-
-/* ------------------------------------------------------------------
- File operations for the device
- ------------------------------------------------------------------*/
-
-static const struct v4l2_ctrl_ops vivi_ctrl_ops = {
- .g_volatile_ctrl = vivi_g_volatile_ctrl,
- .s_ctrl = vivi_s_ctrl,
-};
-
-#define VIVI_CID_CUSTOM_BASE (V4L2_CID_USER_BASE | 0xf000)
-
-static const struct v4l2_ctrl_config vivi_ctrl_button = {
- .ops = &vivi_ctrl_ops,
- .id = VIVI_CID_CUSTOM_BASE + 0,
- .name = "Button",
- .type = V4L2_CTRL_TYPE_BUTTON,
-};
-
-static const struct v4l2_ctrl_config vivi_ctrl_boolean = {
- .ops = &vivi_ctrl_ops,
- .id = VIVI_CID_CUSTOM_BASE + 1,
- .name = "Boolean",
- .type = V4L2_CTRL_TYPE_BOOLEAN,
- .min = 0,
- .max = 1,
- .step = 1,
- .def = 1,
-};
-
-static const struct v4l2_ctrl_config vivi_ctrl_int32 = {
- .ops = &vivi_ctrl_ops,
- .id = VIVI_CID_CUSTOM_BASE + 2,
- .name = "Integer 32 Bits",
- .type = V4L2_CTRL_TYPE_INTEGER,
- .min = -0x80000000LL,
- .max = 0x7fffffff,
- .step = 1,
-};
-
-static const struct v4l2_ctrl_config vivi_ctrl_int64 = {
- .ops = &vivi_ctrl_ops,
- .id = VIVI_CID_CUSTOM_BASE + 3,
- .name = "Integer 64 Bits",
- .type = V4L2_CTRL_TYPE_INTEGER64,
- .min = LLONG_MIN,
- .max = LLONG_MAX,
- .step = 1,
-};
-
-static const char * const vivi_ctrl_menu_strings[] = {
- "Menu Item 0 (Skipped)",
- "Menu Item 1",
- "Menu Item 2 (Skipped)",
- "Menu Item 3",
- "Menu Item 4",
- "Menu Item 5 (Skipped)",
- NULL,
-};
-
-static const struct v4l2_ctrl_config vivi_ctrl_menu = {
- .ops = &vivi_ctrl_ops,
- .id = VIVI_CID_CUSTOM_BASE + 4,
- .name = "Menu",
- .type = V4L2_CTRL_TYPE_MENU,
- .min = 1,
- .max = 4,
- .def = 3,
- .menu_skip_mask = 0x04,
- .qmenu = vivi_ctrl_menu_strings,
-};
-
-static const struct v4l2_ctrl_config vivi_ctrl_string = {
- .ops = &vivi_ctrl_ops,
- .id = VIVI_CID_CUSTOM_BASE + 5,
- .name = "String",
- .type = V4L2_CTRL_TYPE_STRING,
- .min = 2,
- .max = 4,
- .step = 1,
-};
-
-static const struct v4l2_ctrl_config vivi_ctrl_bitmask = {
- .ops = &vivi_ctrl_ops,
- .id = VIVI_CID_CUSTOM_BASE + 6,
- .name = "Bitmask",
- .type = V4L2_CTRL_TYPE_BITMASK,
- .def = 0x80002000,
- .min = 0,
- .max = 0x80402010,
- .step = 0,
-};
-
-static const s64 vivi_ctrl_int_menu_values[] = {
- 1, 1, 2, 3, 5, 8, 13, 21, 42,
-};
-
-static const struct v4l2_ctrl_config vivi_ctrl_int_menu = {
- .ops = &vivi_ctrl_ops,
- .id = VIVI_CID_CUSTOM_BASE + 7,
- .name = "Integer menu",
- .type = V4L2_CTRL_TYPE_INTEGER_MENU,
- .min = 1,
- .max = 8,
- .def = 4,
- .menu_skip_mask = 0x02,
- .qmenu_int = vivi_ctrl_int_menu_values,
-};
-
-static const struct v4l2_file_operations vivi_fops = {
- .owner = THIS_MODULE,
- .open = v4l2_fh_open,
- .release = vb2_fop_release,
- .read = vb2_fop_read,
- .poll = vb2_fop_poll,
- .unlocked_ioctl = video_ioctl2, /* V4L2 ioctl handler */
- .mmap = vb2_fop_mmap,
-};
-
-static const struct v4l2_ioctl_ops vivi_ioctl_ops = {
- .vidioc_querycap = vidioc_querycap,
- .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
- .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
- .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
- .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
- .vidioc_enum_framesizes = vidioc_enum_framesizes,
- .vidioc_reqbufs = vb2_ioctl_reqbufs,
- .vidioc_create_bufs = vb2_ioctl_create_bufs,
- .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
- .vidioc_querybuf = vb2_ioctl_querybuf,
- .vidioc_qbuf = vb2_ioctl_qbuf,
- .vidioc_dqbuf = vb2_ioctl_dqbuf,
- .vidioc_enum_input = vidioc_enum_input,
- .vidioc_g_input = vidioc_g_input,
- .vidioc_s_input = vidioc_s_input,
- .vidioc_enum_frameintervals = vidioc_enum_frameintervals,
- .vidioc_g_parm = vidioc_g_parm,
- .vidioc_s_parm = vidioc_s_parm,
- .vidioc_streamon = vb2_ioctl_streamon,
- .vidioc_streamoff = vb2_ioctl_streamoff,
- .vidioc_log_status = v4l2_ctrl_log_status,
- .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
- .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
-};
-
-static const struct video_device vivi_template = {
- .name = "vivi",
- .fops = &vivi_fops,
- .ioctl_ops = &vivi_ioctl_ops,
- .release = video_device_release_empty,
-};
-
-/* -----------------------------------------------------------------
- Initialization and module stuff
- ------------------------------------------------------------------*/
-
-static int vivi_release(void)
-{
- struct vivi_dev *dev;
- struct list_head *list;
-
- while (!list_empty(&vivi_devlist)) {
- list = vivi_devlist.next;
- list_del(list);
- dev = list_entry(list, struct vivi_dev, vivi_devlist);
-
- v4l2_info(&dev->v4l2_dev, "unregistering %s\n",
- video_device_node_name(&dev->vdev));
- video_unregister_device(&dev->vdev);
- v4l2_device_unregister(&dev->v4l2_dev);
- v4l2_ctrl_handler_free(&dev->ctrl_handler);
- kfree(dev);
- }
-
- return 0;
-}
-
-static int __init vivi_create_instance(int inst)
-{
- struct vivi_dev *dev;
- struct video_device *vfd;
- struct v4l2_ctrl_handler *hdl;
- struct vb2_queue *q;
- int ret;
-
- dev = kzalloc(sizeof(*dev), GFP_KERNEL);
- if (!dev)
- return -ENOMEM;
-
- snprintf(dev->v4l2_dev.name, sizeof(dev->v4l2_dev.name),
- "%s-%03d", VIVI_MODULE_NAME, inst);
- ret = v4l2_device_register(NULL, &dev->v4l2_dev);
- if (ret)
- goto free_dev;
-
- dev->fmt = &formats[0];
- dev->timeperframe = tpf_default;
- dev->width = 640;
- dev->height = 480;
- dev->pixelsize = dev->fmt->depth / 8;
- hdl = &dev->ctrl_handler;
- v4l2_ctrl_handler_init(hdl, 11);
- dev->volume = v4l2_ctrl_new_std(hdl, &vivi_ctrl_ops,
- V4L2_CID_AUDIO_VOLUME, 0, 255, 1, 200);
- dev->brightness = v4l2_ctrl_new_std(hdl, &vivi_ctrl_ops,
- V4L2_CID_BRIGHTNESS, 0, 255, 1, 127);
- dev->contrast = v4l2_ctrl_new_std(hdl, &vivi_ctrl_ops,
- V4L2_CID_CONTRAST, 0, 255, 1, 16);
- dev->saturation = v4l2_ctrl_new_std(hdl, &vivi_ctrl_ops,
- V4L2_CID_SATURATION, 0, 255, 1, 127);
- dev->hue = v4l2_ctrl_new_std(hdl, &vivi_ctrl_ops,
- V4L2_CID_HUE, -128, 127, 1, 0);
- dev->autogain = v4l2_ctrl_new_std(hdl, &vivi_ctrl_ops,
- V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
- dev->gain = v4l2_ctrl_new_std(hdl, &vivi_ctrl_ops,
- V4L2_CID_GAIN, 0, 255, 1, 100);
- dev->alpha = v4l2_ctrl_new_std(hdl, &vivi_ctrl_ops,
- V4L2_CID_ALPHA_COMPONENT, 0, 255, 1, 0);
- dev->button = v4l2_ctrl_new_custom(hdl, &vivi_ctrl_button, NULL);
- dev->int32 = v4l2_ctrl_new_custom(hdl, &vivi_ctrl_int32, NULL);
- dev->int64 = v4l2_ctrl_new_custom(hdl, &vivi_ctrl_int64, NULL);
- dev->boolean = v4l2_ctrl_new_custom(hdl, &vivi_ctrl_boolean, NULL);
- dev->menu = v4l2_ctrl_new_custom(hdl, &vivi_ctrl_menu, NULL);
- dev->string = v4l2_ctrl_new_custom(hdl, &vivi_ctrl_string, NULL);
- dev->bitmask = v4l2_ctrl_new_custom(hdl, &vivi_ctrl_bitmask, NULL);
- dev->int_menu = v4l2_ctrl_new_custom(hdl, &vivi_ctrl_int_menu, NULL);
- if (hdl->error) {
- ret = hdl->error;
- goto unreg_dev;
- }
- v4l2_ctrl_auto_cluster(2, &dev->autogain, 0, true);
- dev->v4l2_dev.ctrl_handler = hdl;
-
- /* initialize locks */
- spin_lock_init(&dev->slock);
-
- /* initialize queue */
- q = &dev->vb_vidq;
- q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
- q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | VB2_READ;
- q->drv_priv = dev;
- q->buf_struct_size = sizeof(struct vivi_buffer);
- q->ops = &vivi_video_qops;
- q->mem_ops = &vb2_vmalloc_memops;
- q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
-
- ret = vb2_queue_init(q);
- if (ret)
- goto unreg_dev;
-
- mutex_init(&dev->mutex);
-
- /* init video dma queues */
- INIT_LIST_HEAD(&dev->vidq.active);
- init_waitqueue_head(&dev->vidq.wq);
-
- vfd = &dev->vdev;
- *vfd = vivi_template;
- vfd->debug = debug;
- vfd->v4l2_dev = &dev->v4l2_dev;
- vfd->queue = q;
-
- /*
- * Provide a mutex to v4l2 core. It will be used to protect
- * all fops and v4l2 ioctls.
- */
- vfd->lock = &dev->mutex;
- video_set_drvdata(vfd, dev);
-
- ret = video_register_device(vfd, VFL_TYPE_GRABBER, video_nr);
- if (ret < 0)
- goto unreg_dev;
-
- /* Now that everything is fine, let's add it to device list */
- list_add_tail(&dev->vivi_devlist, &vivi_devlist);
-
- v4l2_info(&dev->v4l2_dev, "V4L2 device registered as %s\n",
- video_device_node_name(vfd));
- return 0;
-
-unreg_dev:
- v4l2_ctrl_handler_free(hdl);
- v4l2_device_unregister(&dev->v4l2_dev);
-free_dev:
- kfree(dev);
- return ret;
-}
-
-/* This routine allocates from 1 to n_devs virtual drivers.
-
- The real maximum number of virtual drivers will depend on how many drivers
- will succeed. This is limited to the maximum number of devices that
- videodev supports, which is equal to VIDEO_NUM_DEVICES.
- */
-static int __init vivi_init(void)
-{
- const struct font_desc *font = find_font("VGA8x16");
- int ret = 0, i;
-
- if (font == NULL) {
- printk(KERN_ERR "vivi: could not find font\n");
- return -ENODEV;
- }
- font8x16 = font->data;
-
- if (n_devs <= 0)
- n_devs = 1;
-
- for (i = 0; i < n_devs; i++) {
- ret = vivi_create_instance(i);
- if (ret) {
- /* If some instantiations succeeded, keep driver */
- if (i)
- ret = 0;
- break;
- }
- }
-
- if (ret < 0) {
- printk(KERN_ERR "vivi: error %d while loading driver\n", ret);
- return ret;
- }
-
- printk(KERN_INFO "Video Technology Magazine Virtual Video "
- "Capture Board ver %s successfully loaded.\n",
- VIVI_VERSION);
-
- /* n_devs will reflect the actual number of allocated devices */
- n_devs = i;
-
- return ret;
-}
-
-static void __exit vivi_exit(void)
-{
- vivi_release();
-}
-
-module_init(vivi_init);
-module_exit(vivi_exit);
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