diff options
Diffstat (limited to 'drivers/media/video/vivi.c')
| -rw-r--r-- | drivers/media/video/vivi.c | 1453 |
1 files changed, 1453 insertions, 0 deletions
diff --git a/drivers/media/video/vivi.c b/drivers/media/video/vivi.c new file mode 100644 index 000000000000..e2d941bae43e --- /dev/null +++ b/drivers/media/video/vivi.c @@ -0,0 +1,1453 @@ +/* + * 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/ + * + * 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/delay.h> +#include <linux/errno.h> +#include <linux/fs.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/mm.h> +#include <linux/ioport.h> +#include <linux/init.h> +#include <linux/sched.h> +#include <linux/pci.h> +#include <linux/random.h> +#include <linux/version.h> +#include <linux/videodev2.h> +#include <media/video-buf.h> +#include <media/v4l2-common.h> +#include <linux/kthread.h> +#include <linux/highmem.h> + +/* Wake up at about 30 fps */ +#define WAKE_NUMERATOR 30 +#define WAKE_DENOMINATOR 1001 +#define BUFFER_TIMEOUT msecs_to_jiffies(500) /* 0.5 seconds */ + +/* These timers are for 1 fps - used only for testing */ +//#define WAKE_DENOMINATOR 30 /* hack for testing purposes */ +//#define BUFFER_TIMEOUT msecs_to_jiffies(5000) /* 5 seconds */ + +#include "font.h" + +#ifndef kzalloc +#define kzalloc(size, flags) \ +({ \ + void *__ret = kmalloc(size, flags); \ + if (__ret) \ + memset(__ret, 0, size); \ + __ret; \ +}) +#endif + +MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board"); +MODULE_AUTHOR("Ted Walther and John Sokol"); +MODULE_LICENSE("Dual BSD/GPL"); + +#define VIVI_MAJOR_VERSION 0 +#define VIVI_MINOR_VERSION 4 +#define VIVI_RELEASE 0 +#define VIVI_VERSION KERNEL_VERSION(VIVI_MAJOR_VERSION, VIVI_MINOR_VERSION, VIVI_RELEASE) + +static int video_nr = -1; /* /dev/videoN, -1 for autodetect */ +module_param(video_nr, int, 0); + +static int debug = 0; +module_param(debug, int, 0); + +static unsigned int vid_limit = 16; +module_param(vid_limit,int,0644); +MODULE_PARM_DESC(vid_limit,"capture memory limit in megabytes"); + +/* supported controls */ +static struct v4l2_queryctrl vivi_qctrl[] = { + { + .id = V4L2_CID_AUDIO_VOLUME, + .name = "Volume", + .minimum = 0, + .maximum = 65535, + .step = 65535/100, + .default_value = 65535, + .flags = 0, + .type = V4L2_CTRL_TYPE_INTEGER, + },{ + .id = V4L2_CID_BRIGHTNESS, + .type = V4L2_CTRL_TYPE_INTEGER, + .name = "Brightness", + .minimum = 0, + .maximum = 255, + .step = 1, + .default_value = 127, + .flags = 0, + }, { + .id = V4L2_CID_CONTRAST, + .type = V4L2_CTRL_TYPE_INTEGER, + .name = "Contrast", + .minimum = 0, + .maximum = 255, + .step = 0x1, + .default_value = 0x10, + .flags = 0, + }, { + .id = V4L2_CID_SATURATION, + .type = V4L2_CTRL_TYPE_INTEGER, + .name = "Saturation", + .minimum = 0, + .maximum = 255, + .step = 0x1, + .default_value = 127, + .flags = 0, + }, { + .id = V4L2_CID_HUE, + .type = V4L2_CTRL_TYPE_INTEGER, + .name = "Hue", + .minimum = -128, + .maximum = 127, + .step = 0x1, + .default_value = 0, + .flags = 0, + } +}; + +static int qctl_regs[ARRAY_SIZE(vivi_qctrl)]; + +#define dprintk(level,fmt, arg...) \ + do { \ + if (debug >= (level)) \ + printk(KERN_DEBUG "vivi: " fmt , ## arg); \ + } while (0) + +/* ------------------------------------------------------------------ + Basic structures + ------------------------------------------------------------------*/ + +struct vivi_fmt { + char *name; + u32 fourcc; /* v4l2 format id */ + int depth; +}; + +static struct vivi_fmt format = { + .name = "4:2:2, packed, YUYV", + .fourcc = V4L2_PIX_FMT_YUYV, + .depth = 16, +}; + +struct sg_to_addr { + int pos; + struct scatterlist *sg; +}; + +/* buffer for one video frame */ +struct vivi_buffer { + /* common v4l buffer stuff -- must be first */ + struct videobuf_buffer vb; + + struct vivi_fmt *fmt; + + struct sg_to_addr *to_addr; +}; + +struct vivi_dmaqueue { + struct list_head active; + struct list_head queued; + struct timer_list timeout; + + /* 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 semaphore lock; + + int users; + + /* various device info */ + unsigned int resources; + struct video_device video_dev; + + struct vivi_dmaqueue vidq; + + /* Several counters */ + int h,m,s,us,jiffies; + char timestr[13]; +}; + +struct vivi_fh { + struct vivi_dev *dev; + + /* video capture */ + struct vivi_fmt *fmt; + unsigned int width,height; + struct videobuf_queue vb_vidq; + + enum v4l2_buf_type type; +}; + +/* ------------------------------------------------------------------ + DMA and thread functions + ------------------------------------------------------------------*/ + +/* Bars and Colors should match positions */ + +enum colors { + WHITE, + AMBAR, + CYAN, + GREEN, + MAGENTA, + RED, + BLUE +}; + +static u8 bars[8][3] = { + /* R G B */ + {204,204,204}, /* white */ + {208,208, 0}, /* ambar */ + { 0,206,206}, /* cyan */ + { 0,239, 0}, /* green */ + {239, 0,239}, /* magenta */ + {205, 0, 0}, /* red */ + { 0, 0,255}, /* blue */ + { 0, 0, 0} +}; + +#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) + +#define TSTAMP_MIN_Y 24 +#define TSTAMP_MAX_Y TSTAMP_MIN_Y+15 +#define TSTAMP_MIN_X 64 + +void prep_to_addr(struct sg_to_addr to_addr[],struct videobuf_buffer *vb) +{ + int i, pos=0; + + for (i=0;i<vb->dma.nr_pages;i++) { + to_addr[i].sg=&vb->dma.sglist[i]; + to_addr[i].pos=pos; + pos += vb->dma.sglist[i].length; + } +} + +inline int get_addr_pos(int pos, int pages, struct sg_to_addr to_addr[]) +{ + int p1=0,p2=pages-1,p3=pages/2; + + /* Sanity test */ + BUG_ON (pos>=to_addr[p2].pos+to_addr[p2].sg->length); + + while (p1+1<p2) { + if (pos < to_addr[p3].pos) { + p2=p3; + } else { + p1=p3; + } + p3=(p1+p2)/2; + } + if (pos >= to_addr[p2].pos) + p1=p2; + + return (p1); +} + +void gen_line(struct sg_to_addr to_addr[],int inipos,int pages,int wmax, + int hmax, int line, char *timestr) +{ + int w,i,j,pos=inipos,pgpos,oldpg,y; + char *p,*s,*basep; + struct page *pg; + u8 chr,r,g,b,color; + + /* Get first addr pointed to pixel position */ + oldpg=get_addr_pos(pos,pages,to_addr); + pg=pfn_to_page(to_addr[oldpg].sg->dma_address >> PAGE_SHIFT); + basep = kmap_atomic(pg, KM_BOUNCE_READ)+to_addr[oldpg].sg->offset; + + /* We will just duplicate the second pixel at the packet */ + wmax/=2; + + /* Generate a standard color bar pattern */ + for (w=0;w<wmax;w++) { + r=bars[w*7/wmax][0]; + g=bars[w*7/wmax][1]; + b=bars[w*7/wmax][2]; + + for (color=0;color<4;color++) { + pgpos=get_addr_pos(pos,pages,to_addr); + if (pgpos!=oldpg) { + pg=pfn_to_page(to_addr[pgpos].sg->dma_address >> PAGE_SHIFT); + kunmap_atomic(basep, KM_BOUNCE_READ); + basep= kmap_atomic(pg, KM_BOUNCE_READ)+to_addr[pgpos].sg->offset; + oldpg=pgpos; + } + p=basep+pos-to_addr[pgpos].pos; + + switch (color) { + case 0: + case 2: + *p=TO_Y(r,g,b); /* Luminance */ + break; + case 1: + *p=TO_U(r,g,b); /* Cb */ + break; + case 3: + *p=TO_V(r,g,b); /* Cr */ + break; + } + pos++; + } + } + + /* Checks if it is possible to show timestamp */ + if (TSTAMP_MAX_Y>=hmax) + goto end; + if (TSTAMP_MIN_X+strlen(timestr)>=wmax) + goto end; + + /* Print stream time */ + if (line>=TSTAMP_MIN_Y && line<=TSTAMP_MAX_Y) { + j=TSTAMP_MIN_X; + for (s=timestr;*s;s++) { + chr=rom8x16_bits[(*s-0x30)*16+line-TSTAMP_MIN_Y]; + for (i=0;i<7;i++) { + if (chr&1<<(7-i)) { /* Font color*/ + r=bars[BLUE][0]; + g=bars[BLUE][1]; + b=bars[BLUE][2]; + r=g=b=0; + g=198; + } else { /* Background color */ + r=bars[WHITE][0]; + g=bars[WHITE][1]; + b=bars[WHITE][2]; + r=g=b=0; + } + + pos=inipos+j*2; + for (color=0;color<4;color++) { + pgpos=get_addr_pos(pos,pages,to_addr); + if (pgpos!=oldpg) { + pg=pfn_to_page(to_addr[pgpos]. + sg->dma_address + >> PAGE_SHIFT); + kunmap_atomic(basep, + KM_BOUNCE_READ); + basep= kmap_atomic(pg, + KM_BOUNCE_READ)+ + to_addr[pgpos].sg->offset; + oldpg=pgpos; + } + p=basep+pos-to_addr[pgpos].pos; + + y=TO_Y(r,g,b); + + switch (color) { + case 0: + case 2: + *p=TO_Y(r,g,b); /* Luminance */ + break; + case 1: + *p=TO_U(r,g,b); /* Cb */ + break; + case 3: + *p=TO_V(r,g,b); /* Cr */ + break; + } + pos++; + } + j++; + } + } + } + + +end: + kunmap_atomic(basep, KM_BOUNCE_READ); +} +static void vivi_fillbuff(struct vivi_dev *dev,struct vivi_buffer *buf) +{ + int h,pos=0; + int hmax = buf->vb.height; + int wmax = buf->vb.width; + struct videobuf_buffer *vb=&buf->vb; + struct sg_to_addr *to_addr=buf->to_addr; + struct timeval ts; + + /* Test if DMA mapping is ready */ + if (!vb->dma.sglist[0].dma_address) + return; + + prep_to_addr(to_addr,vb); + + /* Check if there is enough memory */ + BUG_ON(buf->vb.dma.nr_pages << PAGE_SHIFT < (buf->vb.width*buf->vb.height)*2); + + for (h=0;h<hmax;h++) { + gen_line(to_addr,pos,vb->dma.nr_pages,wmax,hmax,h,dev->timestr); + pos += wmax*2; + } + + /* Updates stream time */ + + dev->us+=jiffies_to_usecs(jiffies-dev->jiffies); + dev->jiffies=jiffies; + if (dev->us>=1000000) { + dev->us-=1000000; + dev->s++; + if (dev->s>=60) { + dev->s-=60; + dev->m++; + if (dev->m>60) { + dev->m-=60; + dev->h++; + if (dev->h>24) + dev->h-=24; + } + } + } + sprintf(dev->timestr,"%02d:%02d:%02d:%03d", + dev->h,dev->m,dev->s,(dev->us+500)/1000); + + dprintk(2,"vivifill at %s: Buffer 0x%08lx size= %d\n",dev->timestr, + (unsigned long)buf->vb.dma.vmalloc,pos); + + /* Advice that buffer was filled */ + buf->vb.state = STATE_DONE; + buf->vb.field_count++; + do_gettimeofday(&ts); + buf->vb.ts = ts; + + list_del(&buf->vb.queue); + wake_up(&buf->vb.done); +} + +static int restart_video_queue(struct vivi_dmaqueue *dma_q); + +static void vivi_thread_tick(struct vivi_dmaqueue *dma_q) +{ + struct vivi_buffer *buf; + struct vivi_dev *dev= container_of(dma_q,struct vivi_dev,vidq); + + int bc; + + /* Announces videobuf that all went ok */ + for (bc = 0;; bc++) { + if (list_empty(&dma_q->active)) { + dprintk(1,"No active queue to serve\n"); + break; + } + + buf = list_entry(dma_q->active.next, + struct vivi_buffer, vb.queue); + + /* Nobody is waiting something to be done, just return */ + if (!waitqueue_active(&buf->vb.done)) { + mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT); + return; + } + + do_gettimeofday(&buf->vb.ts); + dprintk(2,"[%p/%d] wakeup\n",buf,buf->vb.i); + + /* Fill buffer */ + vivi_fillbuff(dev,buf); + } + if (list_empty(&dma_q->active)) { + del_timer(&dma_q->timeout); + } else { + mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT); + } + if (bc != 1) + dprintk(1,"%s: %d buffers handled (should be 1)\n",__FUNCTION__,bc); +} + +void vivi_sleep(struct vivi_dmaqueue *dma_q) +{ + int timeout; + DECLARE_WAITQUEUE(wait, current); + + dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q); + + add_wait_queue(&dma_q->wq, &wait); + if (!kthread_should_stop()) { + dma_q->frame++; + + /* Calculate time to wake up */ + timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies; + + if (timeout <= 0) { + int old=dma_q->frame; + dma_q->frame=(jiffies_to_msecs(jiffies-dma_q->ini_jiffies)*WAKE_DENOMINATOR)/(WAKE_NUMERATOR*1000)+1; + + timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies; + + dprintk(1,"underrun, losed %d frames. " + "Now, frame is %d. Waking on %d jiffies\n", + dma_q->frame-old,dma_q->frame,timeout); + } else + dprintk(1,"will sleep for %i jiffies\n",timeout); + + vivi_thread_tick(dma_q); + + schedule_timeout_interruptible (timeout); + } + + remove_wait_queue(&dma_q->wq, &wait); + try_to_freeze(); +} + +int vivi_thread(void *data) +{ + struct vivi_dmaqueue *dma_q=data; + + dprintk(1,"thread started\n"); + + for (;;) { + vivi_sleep(dma_q); + + if (kthread_should_stop()) + break; + } + dprintk(1, "thread: exit\n"); + return 0; +} + +int vivi_start_thread(struct vivi_dmaqueue *dma_q) +{ + dma_q->frame=0; + dma_q->ini_jiffies=jiffies; + + dprintk(1,"%s\n",__FUNCTION__); + init_waitqueue_head(&dma_q->wq); + + dma_q->kthread = kthread_run(vivi_thread, dma_q, "vivi"); + + if (dma_q->kthread == NULL) { + printk(KERN_ERR "vivi: kernel_thread() failed\n"); + return -EINVAL; + } + dprintk(1,"returning from %s\n",__FUNCTION__); + return 0; +} + +void vivi_stop_thread(struct vivi_dmaqueue *dma_q) +{ + dprintk(1,"%s\n",__FUNCTION__); + /* shutdown control thread */ + if (dma_q->kthread) { + kthread_stop(dma_q->kthread); + dma_q->kthread=NULL; + } +} + +static int restart_video_queue(struct vivi_dmaqueue *dma_q) +{ + struct vivi_buffer *buf, *prev; + struct list_head *item; + + dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q); + + if (!list_empty(&dma_q->active)) { + buf = list_entry(dma_q->active.next, struct vivi_buffer, vb.queue); + dprintk(2,"restart_queue [%p/%d]: restart dma\n", + buf, buf->vb.i); + + dprintk(1,"Restarting video dma\n"); + vivi_stop_thread(dma_q); +// vivi_start_thread(dma_q); + + /* cancel all outstanding capture / vbi requests */ + list_for_each(item,&dma_q->active) { + buf = list_entry(item, struct vivi_buffer, vb.queue); + + list_del(&buf->vb.queue); + buf->vb.state = STATE_ERROR; + wake_up(&buf->vb.done); + } + mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT); + + return 0; + } + + prev = NULL; + for (;;) { + if (list_empty(&dma_q->queued)) + return 0; + buf = list_entry(dma_q->queued.next, struct vivi_buffer, vb.queue); + if (NULL == prev) { + list_del(&buf->vb.queue); + list_add_tail(&buf->vb.queue,&dma_q->active); + + dprintk(1,"Restarting video dma\n"); + vivi_stop_thread(dma_q); + vivi_start_thread(dma_q); + + buf->vb.state = STATE_ACTIVE; + mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT); + dprintk(2,"[%p/%d] restart_queue - first active\n", + buf,buf->vb.i); + + } else if (prev->vb.width == buf->vb.width && + prev->vb.height == buf->vb.height && + prev->fmt == buf->fmt) { + list_del(&buf->vb.queue); + list_add_tail(&buf->vb.queue,&dma_q->active); + buf->vb.state = STATE_ACTIVE; + dprintk(2,"[%p/%d] restart_queue - move to active\n", + buf,buf->vb.i); + } else { + return 0; + } + prev = buf; + } +} + +static void vivi_vid_timeout(unsigned long data) +{ + struct vivi_dev *dev = (struct vivi_dev*)data; + struct vivi_dmaqueue *vidq = &dev->vidq; + struct vivi_buffer *buf; + + while (!list_empty(&vidq->active)) { + buf = list_entry(vidq->active.next, struct vivi_buffer, vb.queue); + list_del(&buf->vb.queue); + buf->vb.state = STATE_ERROR; + wake_up(&buf->vb.done); + printk("vivi/0: [%p/%d] timeout\n", buf, buf->vb.i); + } + + restart_video_queue(vidq); +} + +/* ------------------------------------------------------------------ + Videobuf operations + ------------------------------------------------------------------*/ +static int +buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size) +{ + struct vivi_fh *fh = vq->priv_data; + + *size = fh->width*fh->height*2; + + if (0 == *count) + *count = 32; + while (*size * *count > vid_limit * 1024 * 1024) + (*count)--; + return 0; +} + +void +free_buffer(struct videobuf_queue *vq, struct vivi_buffer *buf) +{ + dprintk(1,"%s\n",__FUNCTION__); + + if (in_interrupt()) + BUG(); + + /*FIXME: Maybe a spinlock is required here */ + kfree(buf->to_addr); + buf->to_addr=NULL; + + videobuf_waiton(&buf->vb,0,0); + videobuf_dma_unmap(vq, &buf->vb.dma); + videobuf_dma_free(&buf->vb.dma); + buf->vb.state = STATE_NEEDS_INIT; +} + +#define norm_maxw() 1024 +#define norm_maxh() 768 +static int +buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb, + enum v4l2_field field) +{ + struct vivi_fh *fh = vq->priv_data; + struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb); + int rc, init_buffer = 0; + +// dprintk(1,"%s, field=%d\n",__FUNCTION__,field); + + BUG_ON(NULL == fh->fmt); + if (fh->width < 48 || fh->width > norm_maxw() || + fh->height < 32 || fh->height > norm_maxh()) + return -EINVAL; + buf->vb.size = fh->width*fh->height*2; + if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size) + return -EINVAL; + + if (buf->fmt != fh->fmt || + buf->vb.width != fh->width || + buf->vb.height != fh->height || + buf->vb.field != field) { + buf->fmt = fh->fmt; + buf->vb.width = fh->width; + buf->vb.height = fh->height; + buf->vb.field = field; + init_buffer = 1; + } + + if (STATE_NEEDS_INIT == buf->vb.state) { + if (0 != (rc = videobuf_iolock(vq,&buf->vb,NULL))) + goto fail; + } + + buf->vb.state = STATE_PREPARED; + + if (NULL == (buf->to_addr = kmalloc(sizeof(*buf->to_addr) * vb->dma.nr_pages,GFP_KERNEL))) { + rc=-ENOMEM; + goto fail; + } + + return 0; + +fail: + free_buffer(vq,buf); + return rc; +} + +static void +buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb) +{ + struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb); + struct vivi_fh *fh = vq->priv_data; + struct vivi_dev *dev = fh->dev; + struct vivi_dmaqueue *vidq = &dev->vidq; + struct vivi_buffer *prev; + + if (!list_empty(&vidq->queued)) { + dprintk(1,"adding vb queue=0x%08lx\n",(unsigned long)&buf->vb.queue); + list_add_tail(&buf->vb.queue,&vidq->queued); + buf->vb.state = STATE_QUEUED; + dprintk(2,"[%p/%d] buffer_queue - append to queued\n", + buf, buf->vb.i); + } else if (list_empty(&vidq->active)) { + list_add_tail(&buf->vb.queue,&vidq->active); + + buf->vb.state = STATE_ACTIVE; + mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT); + dprintk(2,"[%p/%d] buffer_queue - first active\n", + buf, buf->vb.i); + + vivi_start_thread(vidq); + } else { + prev = list_entry(vidq->active.prev, struct vivi_buffer, vb.queue); + if (prev->vb.width == buf->vb.width && + prev->vb.height == buf->vb.height && + prev->fmt == buf->fmt) { + list_add_tail(&buf->vb.queue,&vidq->active); + buf->vb.state = STATE_ACTIVE; + dprintk(2,"[%p/%d] buffer_queue - append to active\n", + buf, buf->vb.i); + + } else { + list_add_tail(&buf->vb.queue,&vidq->queued); + buf->vb.state = STATE_QUEUED; + dprintk(2,"[%p/%d] buffer_queue - first queued\n", + buf, buf->vb.i); + } + } +} + +static void buffer_release(struct videobuf_queue *vq, struct videobuf_buffer *vb) +{ + struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb); + struct vivi_fh *fh = vq->priv_data; + struct vivi_dev *dev = (struct vivi_dev*)fh->dev; + struct vivi_dmaqueue *vidq = &dev->vidq; + + dprintk(1,"%s\n",__FUNCTION__); + + vivi_stop_thread(vidq); + + free_buffer(vq,buf); +} + +int vivi_map_sg (void *dev, struct scatterlist *sg, int nents, + int direction) +{ + int i; + + dprintk(1,"%s, number of pages=%d\n",__FUNCTION__,nents); + BUG_ON(direction == DMA_NONE); + + for (i = 0; i < nents; i++ ) { + BUG_ON(!sg[i].page); + + sg[i].dma_address = page_to_phys(sg[i].page) + sg[i].offset; + } + + return nents; +} + +int vivi_unmap_sg(void *dev,struct scatterlist *sglist,int nr_pages, + int direction) +{ + dprintk(1,"%s\n",__FUNCTION__); + return 0; +} + +int vivi_dma_sync_sg(void *dev,struct scatterlist *sglist,int nr_pages, + int direction) +{ +// dprintk(1,"%s\n",__FUNCTION__); + +// flush_write_buffers(); + return 0; +} + +static struct videobuf_queue_ops vivi_video_qops = { + .buf_setup = buffer_setup, + .buf_prepare = buffer_prepare, + .buf_queue = buffer_queue, + .buf_release = buffer_release, + + /* Non-pci handling routines */ + .vb_map_sg = vivi_map_sg, + .vb_dma_sync_sg = vivi_dma_sync_sg, + .vb_unmap_sg = vivi_unmap_sg, +}; + +/* ------------------------------------------------------------------ + IOCTL handling + ------------------------------------------------------------------*/ + +static int vivi_try_fmt(struct vivi_dev *dev, struct vivi_fh *fh, + struct v4l2_format *f) +{ + struct vivi_fmt *fmt; + enum v4l2_field field; + unsigned int maxw, maxh; + + if (format.fourcc != f->fmt.pix.pixelformat) { + dprintk(1,"Fourcc format invalid.\n"); + return -EINVAL; + } + fmt=&format; + + field = f->fmt.pix.field; + + if (field == V4L2_FIELD_ANY) { +// field=V4L2_FIELD_INTERLACED; + field=V4L2_FIELD_SEQ_TB; + } else if (V4L2_FIELD_INTERLACED != field) { + dprintk(1,"Field type invalid.\n"); + return -EINVAL; + } + + maxw = norm_maxw(); + maxh = norm_maxh(); + + f->fmt.pix.field = field; + if (f->fmt.pix.height < 32) + f->fmt.pix.height = 32; + if (f->fmt.pix.height > maxh) + f->fmt.pix.height = maxh; + if (f->fmt.pix.width < 48) + f->fmt.pix.width = 48; + if (f->fmt.pix.width > maxw) + f->fmt.pix.width = maxw; + f->fmt.pix.width &= ~0x03; + f->fmt.pix.bytesperline = + (f->fmt.pix.width * fmt->depth) >> 3; + f->fmt.pix.sizeimage = + f->fmt.pix.height * f->fmt.pix.bytesperline; + + return 0; +} + +static int res_get(struct vivi_dev *dev, struct vivi_fh *fh) +{ + /* is it free? */ + down(&dev->lock); + if (dev->resources) { + /* no, someone else uses it */ + up(&dev->lock); + return 0; + } + /* it's free, grab it */ + dev->resources =1; + dprintk(1,"res: get\n"); + up(&dev->lock); + return 1; +} + +static inline int res_locked(struct vivi_dev *dev) +{ + return (dev->resources); +} + +static void res_free(struct vivi_dev *dev, struct vivi_fh *fh) +{ + down(&dev->lock); + dev->resources = 0; + dprintk(1,"res: put\n"); + up(&dev->lock); +} + +static int vivi_do_ioctl(struct inode *inode, struct file *file, unsigned int cmd, void *arg) +{ + struct vivi_fh *fh = file->private_data; + struct vivi_dev *dev = fh->dev; + int ret=0; + + if (debug) { + if (_IOC_DIR(cmd) & _IOC_WRITE) + v4l_printk_ioctl_arg("vivi(w)",cmd, arg); + else if (!_IOC_DIR(cmd) & _IOC_READ) { + v4l_print_ioctl("vivi", cmd); + } + } + + switch(cmd) { + /* --- capabilities ------------------------------------------ */ + case VIDIOC_QUERYCAP: + { + struct v4l2_capability *cap = (struct v4l2_capability*)arg; + + memset(cap, 0, sizeof(*cap)); + + strcpy(cap->driver, "vivi"); + strcpy(cap->card, "vivi"); + cap->version = VIVI_VERSION; + cap->capabilities = + V4L2_CAP_VIDEO_CAPTURE | + V4L2_CAP_STREAMING | + V4L2_CAP_READWRITE; + break; + } + /* --- capture ioctls ---------------------------------------- */ + case VIDIOC_ENUM_FMT: + { + struct v4l2_fmtdesc *f = arg; + enum v4l2_buf_type type; + unsigned int index; + + index = f->index; + type = f->type; + + if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { + ret=-EINVAL; + break; + } + + switch (type) { + case V4L2_BUF_TYPE_VIDEO_CAPTURE: + if (index > 0){ + ret=-EINVAL; + break; + } + memset(f,0,sizeof(*f)); + + f->index = index; + f->type = type; + strlcpy(f->description,format.name,sizeof(f->description)); + f->pixelformat = format.fourcc; + break; + default: + ret=-EINVAL; + } + break; + } + case VIDIOC_G_FMT: + { + struct v4l2_format *f = (struct v4l2_format *)arg; + + if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { + ret=-EINVAL; + break; + } + + memset(&f->fmt.pix,0,sizeof(f->fmt.pix)); + f->fmt.pix.width = fh->width; + f->fmt.pix.height = fh->height; + f->fmt.pix.field = fh->vb_vidq.field; + f->fmt.pix.pixelformat = fh->fmt->fourcc; + f->fmt.pix.bytesperline = + (f->fmt.pix.width * fh->fmt->depth) >> 3; + f->fmt.pix.sizeimage = + f->fmt.pix.height * f->fmt.pix.bytesperline; + break; + } + case VIDIOC_S_FMT: + { + struct v4l2_format *f = arg; + + if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { + dprintk(1,"Only capture supported.\n"); + ret=-EINVAL; + break; + } + + ret = vivi_try_fmt(dev,fh,f); + if (ret < 0) + break; + + fh->fmt = &format; + fh->width = f->fmt.pix.width; + fh->height = f->fmt.pix.height; + fh->vb_vidq.field = f->fmt.pix.field; + fh->type = f->type; + + break; + } + case VIDIOC_TRY_FMT: + { + struct v4l2_format *f = arg; + if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { + ret=-EINVAL; + break; + } + + ret=vivi_try_fmt(dev,fh,f); + break; + } + case VIDIOC_REQBUFS: + if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { + ret=-EINVAL; + break; + } + ret=videobuf_reqbufs(&fh->vb_vidq, arg); + break; + case VIDIOC_QUERYBUF: + if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { + ret=-EINVAL; + break; + } + ret=videobuf_querybuf(&fh->vb_vidq, arg); + break; + case VIDIOC_QBUF: + if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { + ret=-EINVAL; + break; + } + ret=videobuf_qbuf(&fh->vb_vidq, arg); + break; + case VIDIOC_DQBUF: + if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { + ret=-EINVAL; + break; + } + ret=videobuf_dqbuf(&fh->vb_vidq, arg, + file->f_flags & O_NONBLOCK); + break; +#ifdef HAVE_V4L1 + /* --- streaming capture ------------------------------------- */ + case VIDIOCGMBUF: + { + struct video_mbuf *mbuf = arg; + struct videobuf_queue *q=&fh->vb_vidq; + struct v4l2_requestbuffers req; + unsigned int i; + + memset(&req,0,sizeof(req)); + req.type = q->type; + req.count = 8; + req.memory = V4L2_MEMORY_MMAP; + ret = videobuf_reqbufs(q,&req); + if (ret < 0) + break; + memset(mbuf,0,sizeof(*mbuf)); + mbuf->frames = req.count; + mbuf->size = 0; + for (i = 0; i < mbuf->frames; i++) { + mbuf->offsets[i] = q->bufs[i]->boff; + mbuf->size += q->bufs[i]->bsize; + } + break; + } +#endif + case VIDIOC_STREAMON: + { + if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + if (!res_get(dev,fh)) + return -EBUSY; + ret=videobuf_streamon(&fh->vb_vidq); + break; + } + case VIDIOC_STREAMOFF: + { + if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { + ret=-EINVAL; + break; + } + ret = videobuf_streamoff(&fh->vb_vidq); + if (ret < 0) + break; + res_free(dev,fh); + break; + } + /* ---------- tv norms ---------- */ + case VIDIOC_ENUMSTD: + { + struct v4l2_standard *e = arg; + + if (e->index>0) { + ret=-EINVAL; + break; + } + ret = v4l2_video_std_construct(e, V4L2_STD_NTSC_M, "NTSC-M"); + + /* Allows vivi to use different fps from video std */ + e->frameperiod.numerator = WAKE_NUMERATOR; + e->frameperiod.denominator = WAKE_DENOMINATOR; + + break; + } + case VIDIOC_G_STD: + { + v4l2_std_id *id = arg; + + *id = V4L2_STD_NTSC_M; + break; + } + case VIDIOC_S_STD: + { + break; + } + /* ------ input switching ---------- */ + case VIDIOC_ENUMINPUT: + { /* only one input in this sample driver */ + struct v4l2_input *inp = arg; + + if (inp->index != 0) { + ret=-EINVAL; + break; + } + memset(inp, 0, sizeof(*inp)); + + inp->index = 0; + inp->type = V4L2_INPUT_TYPE_CAMERA; + inp->std = V4L2_STD_NTSC_M; + strcpy(inp->name,"Camera"); + break; + } + case VIDIOC_G_INPUT: + { + unsigned int *i = arg; + + *i = 0; + break; + } + case VIDIOC_S_INPUT: + { + unsigned int *i = arg; + + if (*i > 0) + ret=-EINVAL; + break; + } + + /* --- controls ---------------------------------------------- */ + case VIDIOC_QUERYCTRL: + { + struct v4l2_queryctrl *qc = arg; + int i; + + for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++) + if (qc->id && qc->id == vivi_qctrl[i].id) { + memcpy(qc, &(vivi_qctrl[i]), + sizeof(*qc)); + break; + } + + ret=-EINVAL; + break; + } + case VIDIOC_G_CTRL: + { + struct v4l2_control *ctrl = arg; + int i; + + for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++) + if (ctrl->id == vivi_qctrl[i].id) { + ctrl->value=qctl_regs[i]; + break; + } + + ret=-EINVAL; + break; + } + case VIDIOC_S_CTRL: + { + struct v4l2_control *ctrl = arg; + int i; + for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++) + if (ctrl->id == vivi_qctrl[i].id) { + if (ctrl->value < + vivi_qctrl[i].minimum + || ctrl->value > + vivi_qctrl[i].maximum) { + ret=-ERANGE; + break; + } + qctl_regs[i]=ctrl->value; + break; + } + ret=-EINVAL; + break; + } + default: + ret=v4l_compat_translate_ioctl(inode,file,cmd,arg,vivi_do_ioctl); + } + + if (debug) { + if (ret<0) { + v4l_print_ioctl("vivi(err)", cmd); + dprintk(1,"errcode=%d\n",ret); + } else if (_IOC_DIR(cmd) & _IOC_READ) + v4l_printk_ioctl_arg("vivi(r)",cmd, arg); + } + + return ret; +} + +static int vivi_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) +{ + return video_usercopy(inode, file, cmd, arg, vivi_do_ioctl); +} + +/* ------------------------------------------------------------------ + File operations for the device + ------------------------------------------------------------------*/ + +#define line_buf_size(norm) (norm_maxw(norm)*(format.depth+7)/8) + +static int vivi_open(struct inode *inode, struct file *file) +{ + int minor = iminor(inode); + struct vivi_dev *h,*dev = NULL; + struct vivi_fh *fh; + struct list_head *list; + enum v4l2_buf_type type = 0; + int i; + + printk(KERN_DEBUG "vivi: open called (minor=%d)\n",minor); + + list_for_each(list,&vivi_devlist) { + h = list_entry(list, struct vivi_dev, vivi_devlist); + if (h->video_dev.minor == minor) { + dev = h; + type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + } + } + if (NULL == dev) + return -ENODEV; + + + /* If more than one user, mutex should be added */ + dev->users++; + + dprintk(1,"open minor=%d type=%s users=%d\n", + minor,v4l2_type_names[type],dev->users); + + /* allocate + initialize per filehandle data */ + fh = kzalloc(sizeof(*fh),GFP_KERNEL); + if (NULL == fh) { + dev->users--; + return -ENOMEM; + } + + file->private_data = fh; + fh->dev = dev; + fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + fh->fmt = &format; + fh->width = 640; + fh->height = 480; + + /* Put all controls at a sane state */ + for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++) + qctl_regs[i] =vivi_qctrl[i].default_value; + + dprintk(1,"Open: fh=0x%08lx, dev=0x%08lx, dev->vidq=0x%08lx\n", + (unsigned long)fh,(unsigned long)dev,(unsigned long)&dev->vidq); + dprintk(1,"Open: list_empty queued=%d\n",list_empty(&dev->vidq.queued)); + dprintk(1,"Open: list_empty active=%d\n",list_empty(&dev->vidq.active)); + + /* Resets frame counters */ + dev->h=0; + dev->m=0; + dev->s=0; + dev->us=0; + dev->jiffies=jiffies; + sprintf(dev->timestr,"%02d:%02d:%02d:%03d", + dev->h,dev->m,dev->s,(dev->us+500)/1000); + + videobuf_queue_init(&fh->vb_vidq, &vivi_video_qops, + NULL, NULL, + fh->type, + V4L2_FIELD_INTERLACED, + sizeof(struct vivi_buffer),fh); + + return 0; +} + +static ssize_t +vivi_read(struct file *file, char __user *data, size_t count, loff_t *ppos) +{ + struct vivi_fh *fh = file->private_data; + + if (fh->type==V4L2_BUF_TYPE_VIDEO_CAPTURE) { + if (res_locked(fh->dev)) + return -EBUSY; + return videobuf_read_one(&fh->vb_vidq, data, count, ppos, + file->f_flags & O_NONBLOCK); + } + return 0; +} + +static unsigned int +vivi_poll(struct file *file, struct poll_table_struct *wait) +{ + struct vivi_fh *fh = file->private_data; + struct vivi_buffer *buf; + + dprintk(1,"%s\n",__FUNCTION__); + + if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type) + return POLLERR; + + if (res_get(fh->dev,fh)) { + dprintk(1,"poll: mmap interface\n"); + /* streaming capture */ + if (list_empty(&fh->vb_vidq.stream)) + return POLLERR; + buf = list_entry(fh->vb_vidq.stream.next,struct vivi_buffer,vb.stream); + } else { + dprintk(1,"poll: read() interface\n"); + /* read() capture */ + buf = (struct vivi_buffer*)fh->vb_vidq.read_buf; + if (NULL == buf) + return POLLERR; + } + poll_wait(file, &buf->vb.done, wait); + if (buf->vb.state == STATE_DONE || + buf->vb.state == STATE_ERROR) + return POLLIN|POLLRDNORM; + return 0; +} + +static int vivi_release(struct inode *inode, struct file *file) +{ + struct vivi_fh *fh = file->private_data; + struct vivi_dev *dev = fh->dev; + struct vivi_dmaqueue *vidq = &dev->vidq; + + int minor = iminor(inode); + + vivi_stop_thread(vidq); + videobuf_mmap_free(&fh->vb_vidq); + + kfree (fh); + + dev->users--; + + printk(KERN_DEBUG "vivi: close called (minor=%d, users=%d)\n",minor,dev->users); + + return 0; +} + +static int +vivi_mmap(struct file *file, struct vm_area_struct * vma) +{ + struct vivi_fh *fh = file->private_data; + int ret; + + dprintk (1,"mmap called, vma=0x%08lx\n",(unsigned long)vma); + + ret=videobuf_mmap_mapper(&fh->vb_vidq, vma); + + dprintk (1,"vma start=0x%08lx, size=%ld, ret=%d\n", + (unsigned long)vma->vm_start, + (unsigned long)vma->vm_end-(unsigned long)vma->vm_start, + ret); + + return ret; +} + +static struct file_operations vivi_fops = { + .owner = THIS_MODULE, + .open = vivi_open, + .release = vivi_release, + .read = vivi_read, + .poll = vivi_poll, + .ioctl = vivi_ioctl, + .mmap = vivi_mmap, + .llseek = no_llseek, +}; + +static struct video_device vivi = { + .name = "VTM Virtual Video Capture Board", + .type = VID_TYPE_CAPTURE, + .hardware = 0, + .fops = &vivi_fops, + .minor = -1, +// .release = video_device_release, +}; +/* ------------------------------------------------------------------ + Initialization and module stuff + ------------------------------------------------------------------*/ + +static int __init vivi_init(void) +{ + int ret; + struct vivi_dev *dev; + + dev = kzalloc(sizeof(*dev),GFP_KERNEL); + if (NULL == dev) + return -ENOMEM; + list_add_tail(&dev->vivi_devlist,&vivi_devlist); + + /* init video dma queues */ + INIT_LIST_HEAD(&dev->vidq.active); + INIT_LIST_HEAD(&dev->vidq.queued); + + /* initialize locks */ + init_MUTEX(&dev->lock); + + dev->vidq.timeout.function = vivi_vid_timeout; + dev->vidq.timeout.data = (unsigned long)dev; + init_timer(&dev->vidq.timeout); + + ret = video_register_device(&vivi, VFL_TYPE_GRABBER, video_nr); + printk(KERN_INFO "Video Technology Magazine Virtual Video Capture Board (Load status: %d)\n", ret); + return ret; +} + +static void __exit vivi_exit(void) +{ + struct vivi_dev *h; + struct list_head *list; + + list_for_each(list,&vivi_devlist) { + h = list_entry(list, struct vivi_dev, vivi_devlist); + kfree (h); + } + video_unregister_device(&vivi); +} + +module_init(vivi_init); +module_exit(vivi_exit); |