diff options
Diffstat (limited to 'drivers/usb/dwc3/dwc3-qcom.c')
| -rw-r--r-- | drivers/usb/dwc3/dwc3-qcom.c | 128 |
1 files changed, 123 insertions, 5 deletions
diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c index e1e78e9824b1..c703d552bbcf 100644 --- a/drivers/usb/dwc3/dwc3-qcom.c +++ b/drivers/usb/dwc3/dwc3-qcom.c @@ -13,6 +13,7 @@ #include <linux/module.h> #include <linux/kernel.h> #include <linux/extcon.h> +#include <linux/interconnect.h> #include <linux/of_platform.h> #include <linux/platform_device.h> #include <linux/phy/phy.h> @@ -43,6 +44,14 @@ #define SDM845_QSCRATCH_SIZE 0x400 #define SDM845_DWC3_CORE_SIZE 0xcd00 +/* Interconnect path bandwidths in MBps */ +#define USB_MEMORY_AVG_HS_BW MBps_to_icc(240) +#define USB_MEMORY_PEAK_HS_BW MBps_to_icc(700) +#define USB_MEMORY_AVG_SS_BW MBps_to_icc(1000) +#define USB_MEMORY_PEAK_SS_BW MBps_to_icc(2500) +#define APPS_USB_AVG_BW 0 +#define APPS_USB_PEAK_BW MBps_to_icc(40) + struct dwc3_acpi_pdata { u32 qscratch_base_offset; u32 qscratch_base_size; @@ -76,6 +85,8 @@ struct dwc3_qcom { enum usb_dr_mode mode; bool is_suspended; bool pm_suspended; + struct icc_path *icc_path_ddr; + struct icc_path *icc_path_apps; }; static inline void dwc3_qcom_setbits(void __iomem *base, u32 offset, u32 val) @@ -190,6 +201,96 @@ static int dwc3_qcom_register_extcon(struct dwc3_qcom *qcom) return 0; } +static int dwc3_qcom_interconnect_enable(struct dwc3_qcom *qcom) +{ + int ret; + + ret = icc_enable(qcom->icc_path_ddr); + if (ret) + return ret; + + ret = icc_enable(qcom->icc_path_apps); + if (ret) + icc_disable(qcom->icc_path_ddr); + + return ret; +} + +static int dwc3_qcom_interconnect_disable(struct dwc3_qcom *qcom) +{ + int ret; + + ret = icc_disable(qcom->icc_path_ddr); + if (ret) + return ret; + + ret = icc_disable(qcom->icc_path_apps); + if (ret) + icc_enable(qcom->icc_path_ddr); + + return ret; +} + +/** + * dwc3_qcom_interconnect_init() - Get interconnect path handles + * and set bandwidhth. + * @qcom: Pointer to the concerned usb core. + * + */ +static int dwc3_qcom_interconnect_init(struct dwc3_qcom *qcom) +{ + struct device *dev = qcom->dev; + int ret; + + qcom->icc_path_ddr = of_icc_get(dev, "usb-ddr"); + if (IS_ERR(qcom->icc_path_ddr)) { + dev_err(dev, "failed to get usb-ddr path: %ld\n", + PTR_ERR(qcom->icc_path_ddr)); + return PTR_ERR(qcom->icc_path_ddr); + } + + qcom->icc_path_apps = of_icc_get(dev, "apps-usb"); + if (IS_ERR(qcom->icc_path_apps)) { + dev_err(dev, "failed to get apps-usb path: %ld\n", + PTR_ERR(qcom->icc_path_apps)); + return PTR_ERR(qcom->icc_path_apps); + } + + if (usb_get_maximum_speed(&qcom->dwc3->dev) >= USB_SPEED_SUPER || + usb_get_maximum_speed(&qcom->dwc3->dev) == USB_SPEED_UNKNOWN) + ret = icc_set_bw(qcom->icc_path_ddr, + USB_MEMORY_AVG_SS_BW, USB_MEMORY_PEAK_SS_BW); + else + ret = icc_set_bw(qcom->icc_path_ddr, + USB_MEMORY_AVG_HS_BW, USB_MEMORY_PEAK_HS_BW); + + if (ret) { + dev_err(dev, "failed to set bandwidth for usb-ddr path: %d\n", ret); + return ret; + } + + ret = icc_set_bw(qcom->icc_path_apps, + APPS_USB_AVG_BW, APPS_USB_PEAK_BW); + if (ret) { + dev_err(dev, "failed to set bandwidth for apps-usb path: %d\n", ret); + return ret; + } + + return 0; +} + +/** + * dwc3_qcom_interconnect_exit() - Release interconnect path handles + * @qcom: Pointer to the concerned usb core. + * + * This function is used to release interconnect path handle. + */ +static void dwc3_qcom_interconnect_exit(struct dwc3_qcom *qcom) +{ + icc_put(qcom->icc_path_ddr); + icc_put(qcom->icc_path_apps); +} + static void dwc3_qcom_disable_interrupts(struct dwc3_qcom *qcom) { if (qcom->hs_phy_irq) { @@ -239,7 +340,7 @@ static void dwc3_qcom_enable_interrupts(struct dwc3_qcom *qcom) static int dwc3_qcom_suspend(struct dwc3_qcom *qcom) { u32 val; - int i; + int i, ret; if (qcom->is_suspended) return 0; @@ -251,6 +352,10 @@ static int dwc3_qcom_suspend(struct dwc3_qcom *qcom) for (i = qcom->num_clocks - 1; i >= 0; i--) clk_disable_unprepare(qcom->clks[i]); + ret = dwc3_qcom_interconnect_disable(qcom); + if (ret) + dev_warn(qcom->dev, "failed to disable interconnect: %d\n", ret); + qcom->is_suspended = true; dwc3_qcom_enable_interrupts(qcom); @@ -276,6 +381,10 @@ static int dwc3_qcom_resume(struct dwc3_qcom *qcom) } } + ret = dwc3_qcom_interconnect_enable(qcom); + if (ret) + dev_warn(qcom->dev, "failed to enable interconnect: %d\n", ret); + /* Clear existing events from PHY related to L2 in/out */ dwc3_qcom_setbits(qcom->qscratch_base, PWR_EVNT_IRQ_STAT_REG, PWR_EVNT_LPM_IN_L2_MASK | PWR_EVNT_LPM_OUT_L2_MASK); @@ -335,7 +444,9 @@ static int dwc3_qcom_setup_irq(struct platform_device *pdev) { struct dwc3_qcom *qcom = platform_get_drvdata(pdev); const struct dwc3_acpi_pdata *pdata = qcom->acpi_pdata; - int irq, ret; + int irq; + int ret; + irq = dwc3_qcom_get_irq(pdev, "hs_phy_irq", pdata ? pdata->hs_phy_irq_index : -1); if (irq > 0) { @@ -454,7 +565,7 @@ static const struct property_entry dwc3_qcom_acpi_properties[] = { static int dwc3_qcom_acpi_register_core(struct platform_device *pdev) { - struct dwc3_qcom *qcom = platform_get_drvdata(pdev); + struct dwc3_qcom *qcom = platform_get_drvdata(pdev); struct device *dev = &pdev->dev; struct resource *res, *child_res = NULL; int irq; @@ -514,7 +625,7 @@ out: static int dwc3_qcom_of_register_core(struct platform_device *pdev) { - struct dwc3_qcom *qcom = platform_get_drvdata(pdev); + struct dwc3_qcom *qcom = platform_get_drvdata(pdev); struct device_node *np = pdev->dev.of_node, *dwc3_np; struct device *dev = &pdev->dev; int ret; @@ -638,6 +749,10 @@ static int dwc3_qcom_probe(struct platform_device *pdev) goto depopulate; } + ret = dwc3_qcom_interconnect_init(qcom); + if (ret) + goto depopulate; + qcom->mode = usb_get_dr_mode(&qcom->dwc3->dev); /* enable vbus override for device mode */ @@ -647,7 +762,7 @@ static int dwc3_qcom_probe(struct platform_device *pdev) /* register extcon to override sw_vbus on Vbus change later */ ret = dwc3_qcom_register_extcon(qcom); if (ret) - goto depopulate; + goto interconnect_exit; device_init_wakeup(&pdev->dev, 1); qcom->is_suspended = false; @@ -657,6 +772,8 @@ static int dwc3_qcom_probe(struct platform_device *pdev) return 0; +interconnect_exit: + dwc3_qcom_interconnect_exit(qcom); depopulate: if (np) of_platform_depopulate(&pdev->dev); @@ -687,6 +804,7 @@ static int dwc3_qcom_remove(struct platform_device *pdev) } qcom->num_clocks = 0; + dwc3_qcom_interconnect_exit(qcom); reset_control_assert(qcom->resets); pm_runtime_allow(dev); |