diff options
Diffstat (limited to 'drivers/usb/dwc3/dwc3-am62.c')
| -rw-r--r-- | drivers/usb/dwc3/dwc3-am62.c | 52 |
1 files changed, 51 insertions, 1 deletions
diff --git a/drivers/usb/dwc3/dwc3-am62.c b/drivers/usb/dwc3/dwc3-am62.c index 173cf3579c55..cda9458c809b 100644 --- a/drivers/usb/dwc3/dwc3-am62.c +++ b/drivers/usb/dwc3/dwc3-am62.c @@ -11,12 +11,14 @@ #include <linux/platform_device.h> #include <linux/mfd/syscon.h> #include <linux/of.h> -#include <linux/of_device.h> +#include <linux/of_platform.h> #include <linux/pm_runtime.h> #include <linux/clk.h> #include <linux/regmap.h> #include <linux/pinctrl/consumer.h> +#include "core.h" + /* USB WRAPPER register offsets */ #define USBSS_PID 0x0 #define USBSS_OVERCURRENT_CTRL 0x4 @@ -45,6 +47,10 @@ #define USBSS_PHY_VBUS_SEL_SHIFT 1 #define USBSS_PHY_LANE_REVERSE BIT(0) +/* CORE STAT register bits */ +#define USBSS_CORE_OPERATIONAL_MODE_MASK GENMASK(13, 12) +#define USBSS_CORE_OPERATIONAL_MODE_SHIFT 12 + /* MODE CONTROL register bits */ #define USBSS_MODE_VALID BIT(0) @@ -54,6 +60,13 @@ #define USBSS_WAKEUP_CFG_SESSVALID_EN BIT(1) #define USBSS_WAKEUP_CFG_VBUSVALID_EN BIT(0) +#define USBSS_WAKEUP_CFG_ALL (USBSS_WAKEUP_CFG_VBUSVALID_EN | \ + USBSS_WAKEUP_CFG_SESSVALID_EN | \ + USBSS_WAKEUP_CFG_LINESTATE_EN | \ + USBSS_WAKEUP_CFG_OVERCURRENT_EN) + +#define USBSS_WAKEUP_CFG_NONE 0 + /* WAKEUP STAT register bits */ #define USBSS_WAKEUP_STAT_OVERCURRENT BIT(4) #define USBSS_WAKEUP_STAT_LINESTATE BIT(3) @@ -97,6 +110,7 @@ struct dwc3_data { struct regmap *syscon; unsigned int offset; unsigned int vbus_divider; + u32 wakeup_stat; }; static const int dwc3_ti_rate_table[] = { /* in KHZ */ @@ -233,6 +247,12 @@ static int dwc3_ti_probe(struct platform_device *pdev) reg |= USBSS_MODE_VALID; dwc3_ti_writel(data, USBSS_MODE_CONTROL, reg); + /* Device has capability to wakeup system from sleep */ + device_set_wakeup_capable(dev, true); + ret = device_wakeup_enable(dev); + if (ret) + dev_err(dev, "couldn't enable device as a wakeup source: %d\n", ret); + /* Setting up autosuspend */ pm_runtime_set_autosuspend_delay(dev, DWC3_AM62_AUTOSUSPEND_DELAY); pm_runtime_use_autosuspend(dev); @@ -281,6 +301,27 @@ static int dwc3_ti_remove(struct platform_device *pdev) static int dwc3_ti_suspend_common(struct device *dev) { struct dwc3_data *data = dev_get_drvdata(dev); + u32 reg, current_prtcap_dir; + + if (device_may_wakeup(dev)) { + reg = dwc3_ti_readl(data, USBSS_CORE_STAT); + current_prtcap_dir = (reg & USBSS_CORE_OPERATIONAL_MODE_MASK) + >> USBSS_CORE_OPERATIONAL_MODE_SHIFT; + /* Set wakeup config enable bits */ + reg = dwc3_ti_readl(data, USBSS_WAKEUP_CONFIG); + if (current_prtcap_dir == DWC3_GCTL_PRTCAP_HOST) { + reg = USBSS_WAKEUP_CFG_LINESTATE_EN | USBSS_WAKEUP_CFG_OVERCURRENT_EN; + } else { + reg = USBSS_WAKEUP_CFG_VBUSVALID_EN | USBSS_WAKEUP_CFG_SESSVALID_EN; + /* + * Enable LINESTATE wake up only if connected to bus + * and in U2/L3 state else it causes spurious wake-up. + */ + } + dwc3_ti_writel(data, USBSS_WAKEUP_CONFIG, reg); + /* clear wakeup status so we know what caused the wake up */ + dwc3_ti_writel(data, USBSS_WAKEUP_STAT, USBSS_WAKEUP_STAT_CLR); + } clk_disable_unprepare(data->usb2_refclk); @@ -290,9 +331,18 @@ static int dwc3_ti_suspend_common(struct device *dev) static int dwc3_ti_resume_common(struct device *dev) { struct dwc3_data *data = dev_get_drvdata(dev); + u32 reg; clk_prepare_enable(data->usb2_refclk); + if (device_may_wakeup(dev)) { + /* Clear wakeup config enable bits */ + dwc3_ti_writel(data, USBSS_WAKEUP_CONFIG, USBSS_WAKEUP_CFG_NONE); + } + + reg = dwc3_ti_readl(data, USBSS_WAKEUP_STAT); + data->wakeup_stat = reg; + return 0; } |