C++ (Cpp) msm_otg_link_clk_resetの例

コード例 #1

ファイル: phy-msm-usb.c プロジェクト: guanhe0/kernel

static int msm_link_reset(struct msm_otg *motg)
{
	u32 val;
	int ret;

	ret = msm_otg_link_clk_reset(motg, 1);
	if (ret)
		return ret;

	/* wait for 1ms delay as suggested in HPG. */
	usleep_range(1000, 1200);

	ret = msm_otg_link_clk_reset(motg, 0);
	if (ret)
		return ret;

	if (motg->phy_number)
		writel(readl(USB_PHY_CTRL2) | BIT(16), USB_PHY_CTRL2);

	/* put transceiver in serial mode as part of reset */
	val = readl(USB_PORTSC) & ~PORTSC_PTS_MASK;
	writel(val | PORTSC_PTS_SERIAL, USB_PORTSC);

	return 0;
}

コード例 #2

ファイル: msm72k_otg.c プロジェクト: ANFS/ANFS-kernel

static int msm_otg_phy_reset(struct msm_otg *motg)
{
	u32 val;
	int ret;
	int retries;

	ret = msm_otg_link_clk_reset(motg, 1);
	if (ret)
		return ret;
	ret = msm_otg_phy_clk_reset(motg);
	if (ret)
		return ret;
	ret = msm_otg_link_clk_reset(motg, 0);
	if (ret)
		return ret;

	val = readl(USB_PORTSC) & ~PORTSC_PTS_MASK;
	writel(val | PORTSC_PTS_ULPI, USB_PORTSC);

	for (retries = 3; retries > 0; retries--) {
		ret = ulpi_write(&motg->otg, ULPI_FUNC_CTRL_SUSPENDM,
				ULPI_CLR(ULPI_FUNC_CTRL));
		if (!ret)
			break;
		ret = msm_otg_phy_clk_reset(motg);
		if (ret)
			return ret;
	}
	if (!retries)
		return -ETIMEDOUT;

	/* This reset calibrates the phy, if the above write succeeded */
	ret = msm_otg_phy_clk_reset(motg);
	if (ret)
		return ret;

	for (retries = 3; retries > 0; retries--) {
		ret = ulpi_read(&motg->otg, ULPI_DEBUG);
		if (ret != -ETIMEDOUT)
			break;
		ret = msm_otg_phy_clk_reset(motg);
		if (ret)
			return ret;
	}
	if (!retries)
		return -ETIMEDOUT;

	dev_info(motg->otg.dev, "phy_reset: success\n");
	return 0;
}