saa5249.c

V4l driver for DVB HD

			vtx_pagereq_t *req = arg;
			if (!(req->pagemask & PGMASK_PAGE))
				req->page = 0;
			if (!(req->pagemask & PGMASK_HOUR))
				req->hour = 0;
			if (!(req->pagemask & PGMASK_MINUTE))
				req->minute = 0;
			if (req->page < 0 || req->page > 0x8ff) /* 7FF ?? */
				return -EINVAL;
			req->page &= 0x7ff;
			if (req->hour < 0 || req->hour > 0x3f || req->minute < 0 || req->minute > 0x7f ||
				req->pagemask < 0 || req->pagemask >= PGMASK_MAX || req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
				return -EINVAL;
			t->vdau[req->pgbuf].sregs[0] = (req->pagemask & PG_HUND ? 0x10 : 0) | (req->page / 0x100);
			t->vdau[req->pgbuf].sregs[1] = (req->pagemask & PG_TEN ? 0x10 : 0) | ((req->page / 0x10) & 0xf);
			t->vdau[req->pgbuf].sregs[2] = (req->pagemask & PG_UNIT ? 0x10 : 0) | (req->page & 0xf);
			t->vdau[req->pgbuf].sregs[3] = (req->pagemask & HR_TEN ? 0x10 : 0) | (req->hour / 0x10);
			t->vdau[req->pgbuf].sregs[4] = (req->pagemask & HR_UNIT ? 0x10 : 0) | (req->hour & 0xf);
			t->vdau[req->pgbuf].sregs[5] = (req->pagemask & MIN_TEN ? 0x10 : 0) | (req->minute / 0x10);
			t->vdau[req->pgbuf].sregs[6] = (req->pagemask & MIN_UNIT ? 0x10 : 0) | (req->minute & 0xf);
			t->vdau[req->pgbuf].stopped = FALSE;
			t->vdau[req->pgbuf].clrfound = TRUE;
			t->is_searching[req->pgbuf] = TRUE;
			return 0;
		}

		case VTXIOCGETSTAT:
		{
			vtx_pagereq_t *req = arg;
			u8 infobits[10];
			vtx_pageinfo_t info;
			int a;

			if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
				return -EINVAL;
			if (!t->vdau[req->pgbuf].stopped)
			{
				if (i2c_senddata(t, 2, 0, -1) ||
					i2c_sendbuf(t, 3, sizeof(t->vdau[0].sregs), t->vdau[req->pgbuf].sregs) ||
					i2c_senddata(t, 8, 0, 25, 0, ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', -1) ||
					i2c_senddata(t, 2, 0, t->vdau[req->pgbuf].sregs[0] | 8, -1) ||
					i2c_senddata(t, 8, 0, 25, 0, -1))
					return -EIO;
				jdelay(PAGE_WAIT);
				if (i2c_getdata(t, 10, infobits))
					return -EIO;

				if (!(infobits[8] & 0x10) && !(infobits[7] & 0xf0) &&	/* check FOUND-bit */
					(memcmp(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits)) ||
					time_after_eq(jiffies, t->vdau[req->pgbuf].expire)))
				{		/* check if new page arrived */
					if (i2c_senddata(t, 8, 0, 0, 0, -1) ||
						i2c_getdata(t, VTX_PAGESIZE, t->vdau[req->pgbuf].pgbuf))
						return -EIO;
					t->vdau[req->pgbuf].expire = jiffies + PGBUF_EXPIRE;
					memset(t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE, ' ', VTX_VIRTUALSIZE - VTX_PAGESIZE);
					if (t->virtual_mode)
					{
						/* Packet X/24 */
						if (i2c_senddata(t, 8, 0, 0x20, 0, -1) ||
							i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 20 * 40))
							return -EIO;
						/* Packet X/27/0 */
						if (i2c_senddata(t, 8, 0, 0x21, 0, -1) ||
							i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 16 * 40))
							return -EIO;
						/* Packet 8/30/0...8/30/15
						 * FIXME: AFAIK, the 5249 does hamming-decoding for some bytes in packet 8/30,
						 *        so we should undo this here.
						 */
						if (i2c_senddata(t, 8, 0, 0x22, 0, -1) ||
							i2c_getdata(t, 40, t->vdau[req->pgbuf].pgbuf + VTX_PAGESIZE + 23 * 40))
							return -EIO;
					}
					t->vdau[req->pgbuf].clrfound = FALSE;
					memcpy(t->vdau[req->pgbuf].laststat, infobits, sizeof(infobits));
				}
				else
				{
					memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
				}
			}
			else
			{
				memcpy(infobits, t->vdau[req->pgbuf].laststat, sizeof(infobits));
			}

			info.pagenum = ((infobits[8] << 8) & 0x700) | ((infobits[1] << 4) & 0xf0) | (infobits[0] & 0x0f);
			if (info.pagenum < 0x100)
				info.pagenum += 0x800;
			info.hour = ((infobits[5] << 4) & 0x30) | (infobits[4] & 0x0f);
			info.minute = ((infobits[3] << 4) & 0x70) | (infobits[2] & 0x0f);
			info.charset = ((infobits[7] >> 1) & 7);
			info.delete = !!(infobits[3] & 8);
			info.headline = !!(infobits[5] & 4);
			info.subtitle = !!(infobits[5] & 8);
			info.supp_header = !!(infobits[6] & 1);
			info.update = !!(infobits[6] & 2);
			info.inter_seq = !!(infobits[6] & 4);
			info.dis_disp = !!(infobits[6] & 8);
			info.serial = !!(infobits[7] & 1);
			info.notfound = !!(infobits[8] & 0x10);
			info.pblf = !!(infobits[9] & 0x20);
			info.hamming = 0;
			for (a = 0; a <= 7; a++)
			{
				if (infobits[a] & 0xf0)
				{
					info.hamming = 1;
					break;
				}
			}
			if (t->vdau[req->pgbuf].clrfound)
				info.notfound = 1;
			if(copy_to_user(req->buffer, &info, sizeof(vtx_pageinfo_t)))
				return -EFAULT;
			if (!info.hamming && !info.notfound)
			{
				t->is_searching[req->pgbuf] = FALSE;
			}
			return 0;
		}

		case VTXIOCGETPAGE:
		{
			vtx_pagereq_t *req = arg;
			int start, end;

			if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS || req->start < 0 ||
				req->start > req->end || req->end >= (virtual_mode ? VTX_VIRTUALSIZE : VTX_PAGESIZE))
				return -EINVAL;
			if(copy_to_user(req->buffer, &t->vdau[req->pgbuf].pgbuf[req->start], req->end - req->start + 1))
				return -EFAULT;

			 /*
			  *	Always read the time directly from SAA5249
			  */

			if (req->start <= 39 && req->end >= 32)
			{
				int len;
				char buf[16];
				start = max(req->start, 32);
				end = min(req->end, 39);
				len=end-start+1;
				if (i2c_senddata(t, 8, 0, 0, start, -1) ||
					i2c_getdata(t, len, buf))
					return -EIO;
				if(copy_to_user(req->buffer+start-req->start, buf, len))
					return -EFAULT;
			}
			/* Insert the current header if DAU is still searching for a page */
			if (req->start <= 31 && req->end >= 7 && t->is_searching[req->pgbuf])
			{
				char buf[32];
				int len;
				start = max(req->start, 7);
				end = min(req->end, 31);
				len=end-start+1;
				if (i2c_senddata(t, 8, 0, 0, start, -1) ||
					i2c_getdata(t, len, buf))
					return -EIO;
				if(copy_to_user(req->buffer+start-req->start, buf, len))
					return -EFAULT;
			}
			return 0;
		}

		case VTXIOCSTOPDAU:
		{
			vtx_pagereq_t *req = arg;

			if (req->pgbuf < 0 || req->pgbuf >= NUM_DAUS)
				return -EINVAL;
			t->vdau[req->pgbuf].stopped = TRUE;
			t->is_searching[req->pgbuf] = FALSE;
			return 0;
		}

		case VTXIOCPUTPAGE:
		case VTXIOCSETDISP:
		case VTXIOCPUTSTAT:
			return 0;

		case VTXIOCCLRCACHE:
		{
			if (i2c_senddata(t, 0, NUM_DAUS, 0, 8, -1) || i2c_senddata(t, 11,
				' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',
				' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ', -1))
				return -EIO;
			if (i2c_senddata(t, 3, 0x20, -1))
				return -EIO;
			jdelay(10 * CLEAR_DELAY);			/* I have no idea how long we have to wait here */
			return 0;
		}

		case VTXIOCSETVIRT:
		{
			/* The SAA5249 has virtual-row reception turned on always */
			t->virtual_mode = (int)(long)arg;
			return 0;
		}
	}
	return -EINVAL;
}

/*
 * Translates old vtx IOCTLs to new ones
 *
 * This keeps new kernel versions compatible with old userspace programs.
 */
static inline unsigned int vtx_fix_command(unsigned int cmd)
{
	switch (cmd) {
	case VTXIOCGETINFO_OLD:
		cmd = VTXIOCGETINFO;
		break;
	case VTXIOCCLRPAGE_OLD:
		cmd = VTXIOCCLRPAGE;
		break;
	case VTXIOCCLRFOUND_OLD:
		cmd = VTXIOCCLRFOUND;
		break;
	case VTXIOCPAGEREQ_OLD:
		cmd = VTXIOCPAGEREQ;
		break;
	case VTXIOCGETSTAT_OLD:
		cmd = VTXIOCGETSTAT;
		break;
	case VTXIOCGETPAGE_OLD:
		cmd = VTXIOCGETPAGE;
		break;
	case VTXIOCSTOPDAU_OLD:
		cmd = VTXIOCSTOPDAU;
		break;
	case VTXIOCPUTPAGE_OLD:
		cmd = VTXIOCPUTPAGE;
		break;
	case VTXIOCSETDISP_OLD:
		cmd = VTXIOCSETDISP;
		break;
	case VTXIOCPUTSTAT_OLD:
		cmd = VTXIOCPUTSTAT;
		break;
	case VTXIOCCLRCACHE_OLD:
		cmd = VTXIOCCLRCACHE;
		break;
	case VTXIOCSETVIRT_OLD:
		cmd = VTXIOCSETVIRT;
		break;
	}
	return cmd;
}

/*
 *	Handle the locking
 */

static int saa5249_ioctl(struct inode *inode, struct file *file,
			 unsigned int cmd, unsigned long arg)
{
	struct video_device *vd = video_devdata(file);
	struct saa5249_device *t=vd->priv;
	int err;

	cmd = vtx_fix_command(cmd);
	mutex_lock(&t->lock);
	err = video_usercopy(inode,file,cmd,arg,do_saa5249_ioctl);
	mutex_unlock(&t->lock);
	return err;
}

static int saa5249_open(struct inode *inode, struct file *file)
{
	struct video_device *vd = video_devdata(file);
	struct saa5249_device *t=vd->priv;
	int err,pgbuf;

	err = video_exclusive_open(inode,file);
	if (err < 0)
		return err;

	if (t->client==NULL) {
		err = -ENODEV;
		goto fail;
	}

	if (i2c_senddata(t, 0, 0, -1) ||		/* Select R11 */
						/* Turn off parity checks (we do this ourselves) */
		i2c_senddata(t, 1, disp_modes[t->disp_mode][0], 0, -1) ||
						/* Display TV-picture, no virtual rows */
		i2c_senddata(t, 4, NUM_DAUS, disp_modes[t->disp_mode][1], disp_modes[t->disp_mode][2], 7, -1)) /* Set display to page 4 */

	{
		err = -EIO;
		goto fail;
	}

	for (pgbuf = 0; pgbuf < NUM_DAUS; pgbuf++)
	{
		memset(t->vdau[pgbuf].pgbuf, ' ', sizeof(t->vdau[0].pgbuf));
		memset(t->vdau[pgbuf].sregs, 0, sizeof(t->vdau[0].sregs));
		memset(t->vdau[pgbuf].laststat, 0, sizeof(t->vdau[0].laststat));
		t->vdau[pgbuf].expire = 0;
		t->vdau[pgbuf].clrfound = TRUE;
		t->vdau[pgbuf].stopped = TRUE;
		t->is_searching[pgbuf] = FALSE;
	}
	t->virtual_mode=FALSE;
	return 0;

 fail:
	video_exclusive_release(inode,file);
	return err;
}



static int saa5249_release(struct inode *inode, struct file *file)
{
	struct video_device *vd = video_devdata(file);
	struct saa5249_device *t=vd->priv;
	i2c_senddata(t, 1, 0x20, -1);		/* Turn off CCT */
	i2c_senddata(t, 5, 3, 3, -1);		/* Turn off TV-display */
	video_exclusive_release(inode,file);
	return 0;
}

static int __init init_saa_5249 (void)
{
	printk(KERN_INFO "SAA5249 driver (" IF_NAME " interface) for VideoText version %d.%d\n",
			VTX_VER_MAJ, VTX_VER_MIN);
	return i2c_add_driver(&i2c_driver_videotext);
}

static void __exit cleanup_saa_5249 (void)
{
	i2c_del_driver(&i2c_driver_videotext);
}

module_init(init_saa_5249);
module_exit(cleanup_saa_5249);

static struct file_operations saa_fops = {
	.owner		= THIS_MODULE,
	.open		= saa5249_open,
	.release       	= saa5249_release,
	.ioctl          = saa5249_ioctl,
	.compat_ioctl	= v4l_compat_ioctl32,
	.llseek         = no_llseek,
};

static struct video_device saa_template =
{
	.owner		= THIS_MODULE,
	.name		= IF_NAME,
	.type		= VID_TYPE_TELETEXT,	/*| VID_TYPE_TUNER ?? */
	.hardware	= VID_HARDWARE_SAA5249,
	.fops           = &saa_fops,
};

MODULE_LICENSE("GPL");