C++ readl_poll_timeout函数代码示例

static int wait_for_mba_ready(struct device *dev)
{
	struct q6v5_data *drv = dev_get_drvdata(dev);
	int ret;
	u32 status;

	/* Wait for PBL completion. */
	ret = readl_poll_timeout(drv->rmb_base + RMB_PBL_STATUS, status,
		status != 0, POLL_INTERVAL_US, PBL_MBA_WAIT_TIMEOUT_US);
	if (ret) {
		dev_err(dev, "PBL boot timed out\n");
		return ret;
	}
	if (status != STATUS_PBL_SUCCESS) {
		dev_err(dev, "PBL returned unexpected status %d\n", status);
		return -EINVAL;
	}

	/* Wait for MBA completion. */
	ret = readl_poll_timeout(drv->rmb_base + RMB_MBA_STATUS, status,
		status != 0, POLL_INTERVAL_US, PBL_MBA_WAIT_TIMEOUT_US);
	if (ret) {
		dev_err(dev, "MBA boot timed out\n");
		return ret;
	}
	if (status != STATUS_XPU_UNLOCKED &&
	    status != STATUS_XPU_UNLOCKED_SCRIBBLED) {
		dev_err(dev, "MBA returned unexpected status %d\n", status);
		return -EINVAL;
	}

	return 0;
}

static int dw_mipi_dsi_gen_pkt_hdr_write(struct dw_mipi_dsi *dsi, u32 hdr_val)
{
	int ret;
	u32 val, mask;

	ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS,
				 val, !(val & GEN_CMD_FULL), 1000,
				 CMD_PKT_STATUS_TIMEOUT_US);
	if (ret) {
		dev_err(dsi->dev, "failed to get available command FIFO\n");
		return ret;
	}

	dsi_write(dsi, DSI_GEN_HDR, hdr_val);

	mask = GEN_CMD_EMPTY | GEN_PLD_W_EMPTY;
	ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS,
				 val, (val & mask) == mask,
				 1000, CMD_PKT_STATUS_TIMEOUT_US);
	if (ret) {
		dev_err(dsi->dev, "failed to write command FIFO\n");
		return ret;
	}

	return 0;
}

static int pil_msa_wait_for_mba_ready(struct q6v5_data *drv)
{
    struct device *dev = drv->desc.dev;
    int ret;
    u32 status;


    ret = readl_poll_timeout(drv->rmb_base + RMB_PBL_STATUS, status,
                             status != 0, POLL_INTERVAL_US, pbl_mba_boot_timeout_ms * 1000);
    if (ret) {
        dev_err(dev, "PBL boot timed out\n");
        return ret;
    }
    if (status != STATUS_PBL_SUCCESS) {
        dev_err(dev, "PBL returned unexpected status %d\n", status);
        return -EINVAL;
    }


    ret = readl_poll_timeout(drv->rmb_base + RMB_MBA_STATUS, status,
                             status != 0, POLL_INTERVAL_US, pbl_mba_boot_timeout_ms * 1000);
    if (ret) {
        dev_err(dev, "MBA boot timed out\n");
        return ret;
    }
    if (status != STATUS_XPU_UNLOCKED &&
            status != STATUS_XPU_UNLOCKED_SCRIBBLED) {
        dev_err(dev, "MBA returned unexpected status %d\n", status);
        return -EINVAL;
    }

    return 0;
}

/**
 * stmmac_mdio_read
 * @bus: points to the mii_bus structure
 * @phyaddr: MII addr
 * @phyreg: MII reg
 * Description: it reads data from the MII register from within the phy device.
 * For the 7111 GMAC, we must set the bit 0 in the MII address register while
 * accessing the PHY registers.
 * Fortunately, it seems this has no drawback for the 7109 MAC.
 */
static int stmmac_mdio_read(struct mii_bus *bus, int phyaddr, int phyreg)
{
	struct net_device *ndev = bus->priv;
	struct stmmac_priv *priv = netdev_priv(ndev);
	unsigned int mii_address = priv->hw->mii.addr;
	unsigned int mii_data = priv->hw->mii.data;
	u32 v;
	int data;
	u32 value = MII_BUSY;

	value |= (phyaddr << priv->hw->mii.addr_shift)
		& priv->hw->mii.addr_mask;
	value |= (phyreg << priv->hw->mii.reg_shift) & priv->hw->mii.reg_mask;
	value |= (priv->clk_csr << priv->hw->mii.clk_csr_shift)
		& priv->hw->mii.clk_csr_mask;
	if (priv->plat->has_gmac4)
		value |= MII_GMAC4_READ;

	if (readl_poll_timeout(priv->ioaddr + mii_address, v, !(v & MII_BUSY),
			       100, 10000))
		return -EBUSY;

	writel(value, priv->ioaddr + mii_address);

	if (readl_poll_timeout(priv->ioaddr + mii_address, v, !(v & MII_BUSY),
			       100, 10000))
		return -EBUSY;

	/* Read the data from the MII data register */
	data = (int)readl(priv->ioaddr + mii_data);

	return data;
}

static int dw_mipi_dsi_read(struct dw_mipi_dsi *dsi,
			    const struct mipi_dsi_msg *msg)
{
	int i, j, ret, len = msg->rx_len;
	u8 *buf = msg->rx_buf;
	u32 val;

	/* Wait end of the read operation */
	ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS,
				 val, !(val & GEN_RD_CMD_BUSY),
				 1000, CMD_PKT_STATUS_TIMEOUT_US);
	if (ret) {
		dev_err(dsi->dev, "Timeout during read operation\n");
		return ret;
	}

	for (i = 0; i < len; i += 4) {
		/* Read fifo must not be empty before all bytes are read */
		ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS,
					 val, !(val & GEN_PLD_R_EMPTY),
					 1000, CMD_PKT_STATUS_TIMEOUT_US);
		if (ret) {
			dev_err(dsi->dev, "Read payload FIFO is empty\n");
			return ret;
		}

		val = dsi_read(dsi, DSI_GEN_PLD_DATA);
		for (j = 0; j < 4 && j + i < len; j++)
			buf[i + j] = val >> (8 * j);
	}

	return ret;
}

/* u2-port0 should be powered on and enabled; */
int ssusb_check_clocks(struct ssusb_mtk *ssusb, u32 ex_clks)
{
	void __iomem *ibase = ssusb->ippc_base;
	u32 value, check_val;
	int ret;

	check_val = ex_clks | SSUSB_SYS125_RST_B_STS | SSUSB_SYSPLL_STABLE |
			SSUSB_REF_RST_B_STS;

	ret = readl_poll_timeout(ibase + U3D_SSUSB_IP_PW_STS1, value,
			(check_val == (value & check_val)), 100, 20000);
	if (ret) {
		dev_err(ssusb->dev, "clks of sts1 are not stable!\n");
		return ret;
	}

	ret = readl_poll_timeout(ibase + U3D_SSUSB_IP_PW_STS2, value,
			(value & SSUSB_U2_MAC_SYS_RST_B_STS), 100, 10000);
	if (ret) {
		dev_err(ssusb->dev, "mac2 clock is not stable\n");
		return ret;
	}

	return 0;
}

static int dw_mipi_dsi_phy_init(void *priv_data)
{
	struct dw_mipi_dsi_stm *dsi = priv_data;
	u32 val;
	int ret;

	/* Enable the regulator */
	dsi_set(dsi, DSI_WRPCR, WRPCR_REGEN | WRPCR_BGREN);
	ret = readl_poll_timeout(dsi->base + DSI_WISR, val, val & WISR_RRS,
				 SLEEP_US, TIMEOUT_US);
	if (ret)
		DRM_DEBUG_DRIVER("!TIMEOUT! waiting REGU, let's continue\n");

	/* Enable the DSI PLL & wait for its lock */
	dsi_set(dsi, DSI_WRPCR, WRPCR_PLLEN);
	ret = readl_poll_timeout(dsi->base + DSI_WISR, val, val & WISR_PLLLS,
				 SLEEP_US, TIMEOUT_US);
	if (ret)
		DRM_DEBUG_DRIVER("!TIMEOUT! waiting PLL, let's continue\n");

	/* Enable the DSI wrapper */
	dsi_set(dsi, DSI_WCR, WCR_DSIEN);

	return 0;
}

static bool msdc_cmd_is_ready(struct msdc_host *host)
{
	int ret;
	u32 reg;

	/* The max busy time we can endure is 20ms */
	ret = readl_poll_timeout(&host->base->sdc_sts, reg,
				 !(reg & SDC_STS_CMDBUSY), 20000);

	if (ret) {
		pr_err("CMD bus busy detected\n");
		msdc_reset_hw(host);
		return false;
	}

	if (host->last_resp_type == MMC_RSP_R1b && host->last_data_write) {
		ret = readl_poll_timeout(&host->base->msdc_ps, reg,
					 reg & MSDC_PS_DAT0, 1000000);

		if (ret) {
			pr_err("Card stuck in programming state!\n");
			msdc_reset_hw(host);
			return false;
		}
	}

	return true;
}

/**
 * stmmac_mdio_write
 * @bus: points to the mii_bus structure
 * @phyaddr: MII addr
 * @phyreg: MII reg
 * @phydata: phy data
 * Description: it writes the data into the MII register from within the device.
 */
static int stmmac_mdio_write(struct mii_bus *bus, int phyaddr, int phyreg,
			     u16 phydata)
{
	struct net_device *ndev = bus->priv;
	struct stmmac_priv *priv = netdev_priv(ndev);
	unsigned int mii_address = priv->hw->mii.addr;
	unsigned int mii_data = priv->hw->mii.data;
	u32 v;
	u32 value = MII_BUSY;

	value |= (phyaddr << priv->hw->mii.addr_shift)
		& priv->hw->mii.addr_mask;
	value |= (phyreg << priv->hw->mii.reg_shift) & priv->hw->mii.reg_mask;

	value |= (priv->clk_csr << priv->hw->mii.clk_csr_shift)
		& priv->hw->mii.clk_csr_mask;
	if (priv->plat->has_gmac4)
		value |= MII_GMAC4_WRITE;
	else
		value |= MII_WRITE;

	/* Wait until any existing MII operation is complete */
	if (readl_poll_timeout(priv->ioaddr + mii_address, v, !(v & MII_BUSY),
			       100, 10000))
		return -EBUSY;

	/* Set the MII address register to write */
	writel(phydata, priv->ioaddr + mii_data);
	writel(value, priv->ioaddr + mii_address);

	/* Wait until any existing MII operation is complete */
	return readl_poll_timeout(priv->ioaddr + mii_address, v, !(v & MII_BUSY),
				  100, 10000);
}

void mdss_dsi_controller_cfg(int enable,
			     struct mdss_panel_data *pdata)
{

	u32 dsi_ctrl;
	u32 status;
	u32 sleep_us = 1000;
	u32 timeout_us = 16000;
	struct mdss_dsi_ctrl_pdata *ctrl_pdata = NULL;

	if (pdata == NULL) {
		pr_err("%s: Invalid input data\n", __func__);
		return;
	}

	ctrl_pdata = container_of(pdata, struct mdss_dsi_ctrl_pdata,
				panel_data);

	/* Check for CMD_MODE_DMA_BUSY */
	if (readl_poll_timeout(((ctrl_pdata->ctrl_base) + 0x0008),
			   status,
			   ((status & 0x02) == 0),
	/* add qcom patch to solve cmd lcd esd issue
	 *Currently, Command engine will be blocked when sending
	 *display off command in ESD test. Root cause is
	 *panel BTA will affect DSI status. Reset dsi driver
	 *when command engine is blocked.*/
			     sleep_us, timeout_us)) {
		pr_info("%s: DSI status=%x failed\n", __func__, status);
		pr_info("%s: Doing sw reset\n", __func__);	
		mdss_dsi_sw_reset(pdata);
	}
	/* Check for x_HS_FIFO_EMPTY */
	if (readl_poll_timeout(((ctrl_pdata->ctrl_base) + 0x000c),
			   status,
			   ((status & 0x11111000) == 0x11111000),
			       sleep_us, timeout_us))
		pr_info("%s: FIFO status=%x failed\n", __func__, status);

	/* Check for VIDEO_MODE_ENGINE_BUSY */
	if (readl_poll_timeout(((ctrl_pdata->ctrl_base) + 0x0008),
			   status,
			   ((status & 0x08) == 0),
			       sleep_us, timeout_us)) {
		pr_debug("%s: DSI status=%x\n", __func__, status);
		pr_debug("%s: Doing sw reset\n", __func__);
		mdss_dsi_sw_reset(pdata);
	}

	dsi_ctrl = MIPI_INP((ctrl_pdata->ctrl_base) + 0x0004);
	if (enable)
		dsi_ctrl |= 0x01;
	else
		dsi_ctrl &= ~0x01;

	MIPI_OUTP((ctrl_pdata->ctrl_base) + 0x0004, dsi_ctrl);
	wmb();
}

void mdss_dsi_controller_cfg(int enable,
			     struct mdss_panel_data *pdata)
{

	u32 dsi_ctrl;
	u32 status;
	u32 sleep_us = 1000;
	u32 timeout_us = 16000;
	struct mdss_dsi_ctrl_pdata *ctrl_pdata = NULL;

	if (pdata == NULL) {
		pr_err("%s: Invalid input data\n", __func__);
		return;
	}

	ctrl_pdata = container_of(pdata, struct mdss_dsi_ctrl_pdata,
				panel_data);

	
	if (readl_poll_timeout(((ctrl_pdata->ctrl_base) + 0x0008),
			   status,
			   ((status & 0x02) == 0),
			       sleep_us, timeout_us))
		pr_info("%s: DSI status=%x failed\n", __func__, status);

	
	if (readl_poll_timeout(((ctrl_pdata->ctrl_base) + 0x000c),
			   status,
			   ((status & 0x11111000) == 0x11111000),
			       sleep_us, timeout_us))
		pr_info("%s: FIFO status=%x failed\n", __func__, status);

	
	if (readl_poll_timeout(((ctrl_pdata->ctrl_base) + 0x0008),
			   status,
			   ((status & 0x08) == 0),
			       sleep_us, timeout_us)) {
		pr_debug("%s: DSI status=%x\n", __func__, status);
		pr_debug("%s: Doing sw reset\n", __func__);
		mdss_dsi_sw_reset(pdata);
	}

	dsi_ctrl = MIPI_INP((ctrl_pdata->ctrl_base) + 0x0004);
	if (enable)
		dsi_ctrl |= 0x01;
	else
		dsi_ctrl &= ~0x01;

	MIPI_OUTP((ctrl_pdata->ctrl_base) + 0x0004, dsi_ctrl);
	wmb();
}

static int pil_pronto_shutdown(struct pil_desc *pil)
{
	struct pronto_data *drv = dev_get_drvdata(pil->dev);
	int ret;
	u32 reg, status;

	/* Halt A2XB */
	writel_relaxed(1, drv->axi_halt_base + AXI_HALTREQ);
	ret = readl_poll_timeout(drv->axi_halt_base + AXI_HALTACK,
				status, status, 50, HALT_ACK_TIMEOUT_US);
	if (ret)
		dev_err(pil->dev, "Port halt timeout\n");
	else if (!readl_relaxed(drv->axi_halt_base + AXI_IDLE))
		dev_err(pil->dev, "Port halt failed\n");

	writel_relaxed(0, drv->axi_halt_base + AXI_HALTREQ);

	/* Assert reset to Pronto */
	reg = readl_relaxed(drv->reset_base);
	reg |= CLK_CTL_WCNSS_RESTART_BIT;
	writel_relaxed(reg, drv->reset_base);

	/* Wait for reset to complete */
	mb();
	usleep_range(1000, 2000);

	/* Deassert reset to subsystem and wait for propagation */
	reg = readl_relaxed(drv->reset_base);
	reg &= ~CLK_CTL_WCNSS_RESTART_BIT;
	writel_relaxed(reg, drv->reset_base);
	mb();
	udelay(2);

	return 0;
}

static int pil_mba_init_image(struct pil_desc *pil,
                              const u8 *metadata, size_t size)
{
    struct mba_data *drv = dev_get_drvdata(pil->dev);
    u32 status;
    int ret;

    /* Copy metadata to assigned shared buffer location */
    memcpy(drv->metadata_base, metadata, size);

    /* Initialize length counter to 0 */
    writel_relaxed(0, drv->reg_base + RMB_PMI_CODE_LENGTH);
    drv->img_length = 0;

    /* Pass address of meta-data to the MBA and perform authentication */
    writel_relaxed(drv->metadata_phys, drv->reg_base + RMB_PMI_META_DATA);
    writel_relaxed(CMD_META_DATA_READY, drv->reg_base + RMB_MBA_COMMAND);
    ret = readl_poll_timeout(drv->reg_base + RMB_MBA_STATUS, status,
                             status == STATUS_META_DATA_AUTH_SUCCESS,
                             POLL_INTERVAL_US, AUTH_TIMEOUT_US);
    if (ret)
        dev_err(pil->dev, "MBA authentication timed out\n");

    return ret;
}

static int exynos5440_pcie_phy_power_off(struct phy *phy)
{
	struct exynos_pcie_phy *ep = phy_get_drvdata(phy);
	u32 val;

	if (readl_poll_timeout(ep->phy_base + PCIE_PHY_PLL_LOCKED, val,
				(val != 0), 1, 500)) {
		dev_err(&phy->dev, "PLL Locked: 0x%x\n", val);
		return -ETIMEDOUT;
	}

	val = exynos_pcie_phy_readl(ep->phy_base, PCIE_PHY_COMMON_POWER);
	val |= PCIE_PHY_COMMON_PD_CMN;
	exynos_pcie_phy_writel(ep->phy_base, val, PCIE_PHY_COMMON_POWER);

	val = exynos_pcie_phy_readl(ep->phy_base, PCIE_PHY_TRSV0_POWER);
	val |= PCIE_PHY_TRSV0_PD_TSV;
	exynos_pcie_phy_writel(ep->phy_base, val, PCIE_PHY_TRSV0_POWER);

	val = exynos_pcie_phy_readl(ep->phy_base, PCIE_PHY_TRSV1_POWER);
	val |= PCIE_PHY_TRSV1_PD_TSV;
	exynos_pcie_phy_writel(ep->phy_base, val, PCIE_PHY_TRSV1_POWER);

	val = exynos_pcie_phy_readl(ep->phy_base, PCIE_PHY_TRSV2_POWER);
	val |= PCIE_PHY_TRSV2_PD_TSV;
	exynos_pcie_phy_writel(ep->phy_base, val, PCIE_PHY_TRSV2_POWER);

	val = exynos_pcie_phy_readl(ep->phy_base, PCIE_PHY_TRSV3_POWER);
	val |= PCIE_PHY_TRSV3_PD_TSV;
	exynos_pcie_phy_writel(ep->phy_base, val, PCIE_PHY_TRSV3_POWER);

	return 0;
}

static int xhci_mtk_host_disable(struct xhci_hcd_mtk *mtk)
{
	struct mu3c_ippc_regs __iomem *ippc = mtk->ippc_regs;
	u32 value;
	int ret;
	int i;

	/* power down all u3 ports */
	for (i = 0; i < mtk->num_u3_ports; i++) {
		value = readl(&ippc->u3_ctrl_p[i]);
		value |= CTRL_U3_PORT_PDN;
		writel(value, &ippc->u3_ctrl_p[i]);
	}

	/* power down all u2 ports */
	for (i = 0; i < mtk->num_u2_ports; i++) {
		value = readl(&ippc->u2_ctrl_p[i]);
		value |= CTRL_U2_PORT_PDN;
		writel(value, &ippc->u2_ctrl_p[i]);
	}

	/* power down host ip */
	value = readl(&ippc->ip_pw_ctr1);
	value |= CTRL1_IP_HOST_PDN;
	writel(value, &ippc->ip_pw_ctr1);

	/* wait for host ip to sleep */
	ret = readl_poll_timeout(&ippc->ip_pw_sts1, value,
			  (value & STS1_IP_SLEEP_STS), 100, 100000);
	if (ret) {
		dev_err(mtk->dev, "ip sleep failed!!!\n");
		return ret;
	}
	return 0;
}