C++ (Cpp) hvc_get_chars Examples

Example #1

File: hvc_vio.c Project: 119-org/hi3518-osdrv

static int filtered_get_chars(uint32_t vtermno, char *buf, int count)
{
	unsigned long got;
	int i;

	/*
	 * Vio firmware will read up to SIZE_VIO_GET_CHARS at its own discretion
	 * so we play safe and avoid the situation where got > count which could
	 * overload the flip buffer.
	 */
	if (count < SIZE_VIO_GET_CHARS)
		return -EAGAIN;

	got = hvc_get_chars(vtermno, buf, count);

	/*
	 * Work around a HV bug where it gives us a null
	 * after every \r.  -- paulus
	 */
	for (i = 1; i < got; ++i) {
		if (buf[i] == 0 && buf[i-1] == '\r') {
			--got;
			if (i < got)
				memmove(&buf[i], &buf[i+1],
					got - i);
		}
	}
	return got;
}

Example #2

File: hvsi.c Project: 119-org/hi3518-osdrv

static int hvsi_read(struct hvsi_struct *hp, char *buf, int count)
{
	unsigned long got;

	got = hvc_get_chars(hp->vtermno, buf, count);

	return got;
}

Example #3

File: hvc_console.c Project: GunioRobot/MI424WR_GEN2_Rev_E-F

int hvc_wait_for_keypress(struct console *co)
{
	char c[16] __ALIGNED__;

	while (hvc_get_chars(co->index, &c[0], 1) < 1)
		;
	return 0;
}

Example #4

File: hvc_console.c Project: GunioRobot/MI424WR_GEN2_Rev_E-F

static void hvc_poll(int index)
{
	struct hvc_struct *hp = &hvc_struct[index];
	struct tty_struct *tty;
	int i, n;
	char buf[16] __ALIGNED__;
	unsigned long flags;

	spin_lock_irqsave(&hp->lock, flags);

	if (hp->n_outbuf > 0)
		hvc_push(hp);

	tty = hp->tty;
	if (tty) {
		for (;;) {
			if (TTY_FLIPBUF_SIZE - tty->flip.count < sizeof(buf))
				break;
			n = hvc_get_chars(index + hvc_offset, buf, sizeof(buf));
			if (n <= 0)
				break;
			for (i = 0; i < n; ++i) {
#ifdef CONFIG_MAGIC_SYSRQ		/* Handle the SysRq Hack */
				if (buf[i] == '\x0f') {	/* ^O -- should support a sequence */
					sysrq_pressed = 1;
					continue;
				} else if (sysrq_pressed) {
					handle_sysrq(buf[i], NULL, NULL, tty);
					sysrq_pressed = 0;
					continue;
				}
#endif
				tty_insert_flip_char(tty, buf[i], 0);
			}
		}
		if (tty->flip.count)
			tty_schedule_flip(tty);

		if (hp->do_wakeup) {
			hp->do_wakeup = 0;
			if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP))
			    && tty->ldisc.write_wakeup)
				(tty->ldisc.write_wakeup)(tty);
			wake_up_interruptible(&tty->write_wait);
		}
	}

	spin_unlock_irqrestore(&hp->lock, flags);
}

Example #5

File: hvc_vio.c Project: romanbb/android_kernel_lge_d851

static int hvterm_raw_get_chars(uint32_t vtermno, char *buf, int count)
{
	struct hvterm_priv *pv = hvterm_privs[vtermno];
	unsigned long i;
	unsigned long flags;
	int got;

	if (WARN_ON(!pv))
		return 0;

	spin_lock_irqsave(&pv->buf_lock, flags);

	if (pv->left == 0) {
		pv->offset = 0;
		pv->left = hvc_get_chars(pv->termno, pv->buf, count);

		/*
                                                  
                               
   */
		for (i = 1; i < pv->left; ++i) {
			if (pv->buf[i] == 0 && pv->buf[i-1] == '\r') {
				--pv->left;
				if (i < pv->left) {
					memmove(&pv->buf[i], &pv->buf[i+1],
						pv->left - i);
				}
			}
		}
	}

	got = min(count, pv->left);
	memcpy(buf, &pv->buf[pv->offset], got);
	pv->offset += got;
	pv->left -= got;

	spin_unlock_irqrestore(&pv->buf_lock, flags);

	return got;
}

Example #6

static int filtered_get_chars(uint32_t vtermno, char *buf, int count)
{
	unsigned long got;
	int i;

	
	if (count < SIZE_VIO_GET_CHARS)
		return -EAGAIN;

	got = hvc_get_chars(vtermno, buf, count);

	
	for (i = 1; i < got; ++i) {
		if (buf[i] == 0 && buf[i-1] == '\r') {
			--got;
			if (i < got)
				memmove(&buf[i], &buf[i+1],
					got - i);
		}
	}
	return got;
}