C++ (Cpp) TXFIFO_THRESH Examples

Example #1

static int ehci_reset(void)
{
	uint32_t cmd;
	uint32_t tmp;
	uint32_t *reg_ptr;
	int ret = 0;

	cmd = ehci_readl(&hcor->or_usbcmd);
	cmd = (cmd & ~CMD_RUN) | CMD_RESET;
	ehci_writel(&hcor->or_usbcmd, cmd);
	ret = handshake((uint32_t *)&hcor->or_usbcmd, CMD_RESET, 0, 250 * 1000);
	if (ret < 0) {
		printf("EHCI fail to reset\n");
		goto out;
	}

	if (ehci_is_TDI()) {
		reg_ptr = (uint32_t *)((u8 *)hcor + USBMODE);
		tmp = ehci_readl(reg_ptr);
		tmp |= USBMODE_CM_HC;
#if defined(CONFIG_EHCI_MMIO_BIG_ENDIAN)
		tmp |= USBMODE_BE;
#endif
		ehci_writel(reg_ptr, tmp);
	}

#ifdef CONFIG_USB_EHCI_TXFIFO_THRESH
	cmd = ehci_readl(&hcor->or_txfilltuning);
	cmd &= ~TXFIFO_THRESH(0x3f);
	cmd |= TXFIFO_THRESH(CONFIG_USB_EHCI_TXFIFO_THRESH);
	ehci_writel(&hcor->or_txfilltuning, cmd);
#endif
out:
	return ret;
}

Example #2

File: ehci-hcd.c Project: SDRG-UCT/u-boot_rhino

static int ehci_reset(struct ehci_ctrl *ctrl)
{
	uint32_t cmd;
	int ret = 0;

	cmd = ehci_readl(&ctrl->hcor->or_usbcmd);
	cmd = (cmd & ~CMD_RUN) | CMD_RESET;
	ehci_writel(&ctrl->hcor->or_usbcmd, cmd);
	ret = handshake((uint32_t *)&ctrl->hcor->or_usbcmd,
			CMD_RESET, 0, 250 * 1000);
	if (ret < 0) {
		printf("EHCI fail to reset\n");
		goto out;
	}

	if (ehci_is_TDI())
		ctrl->ops.set_usb_mode(ctrl);

#ifdef CONFIG_USB_EHCI_TXFIFO_THRESH
	cmd = ehci_readl(&ctrl->hcor->or_txfilltuning);
	cmd &= ~TXFIFO_THRESH_MASK;
	cmd |= TXFIFO_THRESH(CONFIG_USB_EHCI_TXFIFO_THRESH);
	ehci_writel(&ctrl->hcor->or_txfilltuning, cmd);
#endif
out:
	return ret;
}

Example #3

File: ehci-fsl.c Project: 0xFelix/u-boot-edminiv2

/*
 * Setting the value of TXFIFO_THRESH field in TXFILLTUNING register
 * to counter DDR latencies in writing data into Tx buffer.
 * This prevents Tx buffer from getting underrun
 */
static void set_txfifothresh(struct usb_ehci *ehci, u32 txfifo_thresh)
{
	u32 cmd;
	cmd = ehci_readl(&ehci->txfilltuning);
	cmd &= ~TXFIFO_THRESH_MASK;
	cmd |= TXFIFO_THRESH(txfifo_thresh);
	ehci_writel(&ehci->txfilltuning, cmd);
}