diff options
Diffstat (limited to 'drivers/usb/cdns3/cdns3-imx.c')
| -rw-r--r-- | drivers/usb/cdns3/cdns3-imx.c | 191 |
1 files changed, 186 insertions, 5 deletions
diff --git a/drivers/usb/cdns3/cdns3-imx.c b/drivers/usb/cdns3/cdns3-imx.c index aba988e71958..54a2d70a9c73 100644 --- a/drivers/usb/cdns3/cdns3-imx.c +++ b/drivers/usb/cdns3/cdns3-imx.c @@ -15,6 +15,8 @@ #include <linux/io.h> #include <linux/of_platform.h> #include <linux/iopoll.h> +#include <linux/pm_runtime.h> +#include "core.h" #define USB3_CORE_CTRL1 0x00 #define USB3_CORE_CTRL2 0x04 @@ -32,7 +34,7 @@ /* Register bits definition */ /* USB3_CORE_CTRL1 */ -#define SW_RESET_MASK (0x3f << 26) +#define SW_RESET_MASK GENMASK(31, 26) #define PWR_SW_RESET BIT(31) #define APB_SW_RESET BIT(30) #define AXI_SW_RESET BIT(29) @@ -53,8 +55,8 @@ #define LPM_CLK_REQ BIT(28) #define DEVU3_WAEKUP_EN BIT(14) #define OTG_WAKEUP_EN BIT(12) -#define DEV_INT_EN (3 << 8) /* DEV INT b9:8 */ -#define HOST_INT1_EN (1 << 0) /* HOST INT b7:0 */ +#define DEV_INT_EN (3 << 8) /* DEV INT b9:8 */ +#define HOST_INT1_EN (1 << 0) /* HOST INT b7:0 */ /* USB3_CORE_STATUS */ #define MDCTRL_CLK_STATUS BIT(15) @@ -66,11 +68,30 @@ #define CLK_VALID_COMPARE_BITS (0xf << 28) #define PHY_REFCLK_REQ (1 << 0) +/* OTG registers definition */ +#define OTGSTS 0x4 +/* OTGSTS */ +#define OTG_NRDY BIT(11) + +/* xHCI registers definition */ +#define XECP_PM_PMCSR 0x8018 +#define XECP_AUX_CTRL_REG1 0x8120 + +/* Register bits definition */ +/* XECP_AUX_CTRL_REG1 */ +#define CFG_RXDET_P3_EN BIT(15) + +/* XECP_PM_PMCSR */ +#define PS_MASK GENMASK(1, 0) +#define PS_D0 0 +#define PS_D1 1 + struct cdns_imx { struct device *dev; void __iomem *noncore; struct clk_bulk_data *clks; int num_clks; + struct platform_device *cdns3_pdev; }; static inline u32 cdns_imx_readl(struct cdns_imx *data, u32 offset) @@ -126,6 +147,20 @@ static int cdns_imx_noncore_init(struct cdns_imx *data) return ret; } +static int cdns_imx_platform_suspend(struct device *dev, + bool suspend, bool wakeup); +static struct cdns3_platform_data cdns_imx_pdata = { + .platform_suspend = cdns_imx_platform_suspend, +}; + +static const struct of_dev_auxdata cdns_imx_auxdata[] = { + { + .compatible = "cdns,usb3", + .platform_data = &cdns_imx_pdata, + }, + {}, +}; + static int cdns_imx_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -162,14 +197,18 @@ static int cdns_imx_probe(struct platform_device *pdev) if (ret) goto err; - ret = of_platform_populate(node, NULL, NULL, dev); + ret = of_platform_populate(node, NULL, cdns_imx_auxdata, dev); if (ret) { dev_err(dev, "failed to create children: %d\n", ret); goto err; } - return ret; + device_set_wakeup_capable(dev, true); + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + pm_runtime_forbid(dev); + return ret; err: clk_bulk_disable_unprepare(data->num_clks, data->clks); return ret; @@ -194,6 +233,147 @@ static int cdns_imx_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM +static void cdns3_set_wakeup(struct cdns_imx *data, bool enable) +{ + u32 value; + + value = cdns_imx_readl(data, USB3_INT_REG); + if (enable) + value |= OTG_WAKEUP_EN | DEVU3_WAEKUP_EN; + else + value &= ~(OTG_WAKEUP_EN | DEVU3_WAEKUP_EN); + + cdns_imx_writel(data, USB3_INT_REG, value); +} + +static int cdns_imx_platform_suspend(struct device *dev, + bool suspend, bool wakeup) +{ + struct cdns3 *cdns = dev_get_drvdata(dev); + struct device *parent = dev->parent; + struct cdns_imx *data = dev_get_drvdata(parent); + void __iomem *otg_regs = (void __iomem *)(cdns->otg_regs); + void __iomem *xhci_regs = cdns->xhci_regs; + u32 value; + int ret = 0; + + if (cdns->role != USB_ROLE_HOST) + return 0; + + if (suspend) { + /* SW request low power when all usb ports allow to it ??? */ + value = readl(xhci_regs + XECP_PM_PMCSR); + value &= ~PS_MASK; + value |= PS_D1; + writel(value, xhci_regs + XECP_PM_PMCSR); + + /* mdctrl_clk_sel */ + value = cdns_imx_readl(data, USB3_CORE_CTRL1); + value |= MDCTRL_CLK_SEL; + cdns_imx_writel(data, USB3_CORE_CTRL1, value); + + /* wait for mdctrl_clk_status */ + value = cdns_imx_readl(data, USB3_CORE_STATUS); + ret = readl_poll_timeout(data->noncore + USB3_CORE_STATUS, value, + (value & MDCTRL_CLK_STATUS) == MDCTRL_CLK_STATUS, + 10, 100000); + if (ret) + dev_warn(parent, "wait mdctrl_clk_status timeout\n"); + + /* wait lpm_clk_req to be 0 */ + value = cdns_imx_readl(data, USB3_INT_REG); + ret = readl_poll_timeout(data->noncore + USB3_INT_REG, value, + (value & LPM_CLK_REQ) != LPM_CLK_REQ, + 10, 100000); + if (ret) + dev_warn(parent, "wait lpm_clk_req timeout\n"); + + /* wait phy_refclk_req to be 0 */ + value = cdns_imx_readl(data, USB3_SSPHY_STATUS); + ret = readl_poll_timeout(data->noncore + USB3_SSPHY_STATUS, value, + (value & PHY_REFCLK_REQ) != PHY_REFCLK_REQ, + 10, 100000); + if (ret) + dev_warn(parent, "wait phy_refclk_req timeout\n"); + + cdns3_set_wakeup(data, wakeup); + } else { + cdns3_set_wakeup(data, false); + + /* SW request D0 */ + value = readl(xhci_regs + XECP_PM_PMCSR); + value &= ~PS_MASK; + value |= PS_D0; + writel(value, xhci_regs + XECP_PM_PMCSR); + + /* clr CFG_RXDET_P3_EN */ + value = readl(xhci_regs + XECP_AUX_CTRL_REG1); + value &= ~CFG_RXDET_P3_EN; + writel(value, xhci_regs + XECP_AUX_CTRL_REG1); + + /* clear mdctrl_clk_sel */ + value = cdns_imx_readl(data, USB3_CORE_CTRL1); + value &= ~MDCTRL_CLK_SEL; + cdns_imx_writel(data, USB3_CORE_CTRL1, value); + + /* wait CLK_125_REQ to be 1 */ + value = cdns_imx_readl(data, USB3_INT_REG); + ret = readl_poll_timeout(data->noncore + USB3_INT_REG, value, + (value & CLK_125_REQ) == CLK_125_REQ, + 10, 100000); + if (ret) + dev_warn(parent, "wait CLK_125_REQ timeout\n"); + + /* wait for mdctrl_clk_status is cleared */ + value = cdns_imx_readl(data, USB3_CORE_STATUS); + ret = readl_poll_timeout(data->noncore + USB3_CORE_STATUS, value, + (value & MDCTRL_CLK_STATUS) != MDCTRL_CLK_STATUS, + 10, 100000); + if (ret) + dev_warn(parent, "wait mdctrl_clk_status cleared timeout\n"); + + /* Wait until OTG_NRDY is 0 */ + value = readl(otg_regs + OTGSTS); + ret = readl_poll_timeout(otg_regs + OTGSTS, value, + (value & OTG_NRDY) != OTG_NRDY, + 10, 100000); + if (ret) + dev_warn(parent, "wait OTG ready timeout\n"); + } + + return ret; + +} + +static int cdns_imx_resume(struct device *dev) +{ + struct cdns_imx *data = dev_get_drvdata(dev); + + return clk_bulk_prepare_enable(data->num_clks, data->clks); +} + +static int cdns_imx_suspend(struct device *dev) +{ + struct cdns_imx *data = dev_get_drvdata(dev); + + clk_bulk_disable_unprepare(data->num_clks, data->clks); + + return 0; +} +#else +static int cdns_imx_platform_suspend(struct device *dev, + bool suspend, bool wakeup) +{ + return 0; +} + +#endif /* CONFIG_PM */ + +static const struct dev_pm_ops cdns_imx_pm_ops = { + SET_RUNTIME_PM_OPS(cdns_imx_suspend, cdns_imx_resume, NULL) +}; + static const struct of_device_id cdns_imx_of_match[] = { { .compatible = "fsl,imx8qm-usb3", }, {}, @@ -206,6 +386,7 @@ static struct platform_driver cdns_imx_driver = { .driver = { .name = "cdns3-imx", .of_match_table = cdns_imx_of_match, + .pm = &cdns_imx_pm_ops, }, }; module_platform_driver(cdns_imx_driver); |