diff options
Diffstat (limited to 'drivers/usb/dwc3')
| -rw-r--r-- | drivers/usb/dwc3/core.c | 23 | ||||
| -rw-r--r-- | drivers/usb/dwc3/core.h | 2 | ||||
| -rw-r--r-- | drivers/usb/dwc3/dwc3-imx8mp.c | 113 | ||||
| -rw-r--r-- | drivers/usb/dwc3/dwc3-octeon.c | 19 | ||||
| -rw-r--r-- | drivers/usb/dwc3/dwc3-omap.c | 4 | ||||
| -rw-r--r-- | drivers/usb/dwc3/dwc3-qcom.c | 16 | ||||
| -rw-r--r-- | drivers/usb/dwc3/dwc3-rtk.c | 52 | ||||
| -rw-r--r-- | drivers/usb/dwc3/dwc3-st.c | 50 | ||||
| -rw-r--r-- | drivers/usb/dwc3/dwc3-xilinx.c | 14 | ||||
| -rw-r--r-- | drivers/usb/dwc3/ep0.c | 3 | ||||
| -rw-r--r-- | drivers/usb/dwc3/gadget.c | 41 |
11 files changed, 153 insertions, 184 deletions
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 734de2a8bd21..9eb085f359ce 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -564,9 +564,17 @@ int dwc3_event_buffers_setup(struct dwc3 *dwc) void dwc3_event_buffers_cleanup(struct dwc3 *dwc) { struct dwc3_event_buffer *evt; + u32 reg; if (!dwc->ev_buf) return; + /* + * Exynos platforms may not be able to access event buffer if the + * controller failed to halt on dwc3_core_exit(). + */ + reg = dwc3_readl(dwc->regs, DWC3_DSTS); + if (!(reg & DWC3_DSTS_DEVCTRLHLT)) + return; evt = dwc->ev_buf; @@ -1379,6 +1387,21 @@ static int dwc3_core_init(struct dwc3 *dwc) } /* + * STAR 9001285599: This issue affects DWC_usb3 version 3.20a + * only. If the PM TIMER ECM is enabled through GUCTL2[19], the + * link compliance test (TD7.21) may fail. If the ECN is not + * enabled (GUCTL2[19] = 0), the controller will use the old timer + * value (5us), which is still acceptable for the link compliance + * test. Therefore, do not enable PM TIMER ECM in 3.20a by + * setting GUCTL2[19] by default; instead, use GUCTL2[19] = 0. + */ + if (DWC3_VER_IS(DWC3, 320A)) { + reg = dwc3_readl(dwc->regs, DWC3_GUCTL2); + reg &= ~DWC3_GUCTL2_LC_TIMER; + dwc3_writel(dwc->regs, DWC3_GUCTL2, reg); + } + + /* * When configured in HOST mode, after issuing U3/L2 exit controller * fails to send proper CRC checksum in CRC5 feild. Because of this * behaviour Transaction Error is generated, resulting in reset and diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 1e561fd8b86e..c71240e8f7c7 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -421,6 +421,7 @@ /* Global User Control Register 2 */ #define DWC3_GUCTL2_RST_ACTBITLATER BIT(14) +#define DWC3_GUCTL2_LC_TIMER BIT(19) /* Global User Control Register 3 */ #define DWC3_GUCTL3_SPLITDISABLE BIT(14) @@ -1269,6 +1270,7 @@ struct dwc3 { #define DWC3_REVISION_290A 0x5533290a #define DWC3_REVISION_300A 0x5533300a #define DWC3_REVISION_310A 0x5533310a +#define DWC3_REVISION_320A 0x5533320a #define DWC3_REVISION_330A 0x5533330a #define DWC31_REVISION_ANY 0x0 diff --git a/drivers/usb/dwc3/dwc3-imx8mp.c b/drivers/usb/dwc3/dwc3-imx8mp.c index 8ee448068503..64c0cd1995aa 100644 --- a/drivers/usb/dwc3/dwc3-imx8mp.c +++ b/drivers/usb/dwc3/dwc3-imx8mp.c @@ -5,6 +5,7 @@ * Copyright (c) 2020 NXP. */ +#include <linux/cleanup.h> #include <linux/clk.h> #include <linux/interrupt.h> #include <linux/io.h> @@ -96,7 +97,8 @@ static void imx8mp_configure_glue(struct dwc3_imx8mp *dwc3_imx) writel(value, dwc3_imx->glue_base + USB_CTRL1); } -static void dwc3_imx8mp_wakeup_enable(struct dwc3_imx8mp *dwc3_imx) +static void dwc3_imx8mp_wakeup_enable(struct dwc3_imx8mp *dwc3_imx, + pm_message_t msg) { struct dwc3 *dwc3 = platform_get_drvdata(dwc3_imx->dwc3); u32 val; @@ -106,12 +108,14 @@ static void dwc3_imx8mp_wakeup_enable(struct dwc3_imx8mp *dwc3_imx) val = readl(dwc3_imx->hsio_blk_base + USB_WAKEUP_CTRL); - if ((dwc3->current_dr_role == DWC3_GCTL_PRTCAP_HOST) && dwc3->xhci) - val |= USB_WAKEUP_EN | USB_WAKEUP_SS_CONN | - USB_WAKEUP_U3_EN | USB_WAKEUP_DPDM_EN; - else if (dwc3->current_dr_role == DWC3_GCTL_PRTCAP_DEVICE) + if ((dwc3->current_dr_role == DWC3_GCTL_PRTCAP_HOST) && dwc3->xhci) { + val |= USB_WAKEUP_EN | USB_WAKEUP_DPDM_EN; + if (PMSG_IS_AUTO(msg)) + val |= USB_WAKEUP_SS_CONN | USB_WAKEUP_U3_EN; + } else { val |= USB_WAKEUP_EN | USB_WAKEUP_VBUS_EN | USB_WAKEUP_VBUS_SRC_SESS_VAL; + } writel(val, dwc3_imx->hsio_blk_base + USB_WAKEUP_CTRL); } @@ -144,10 +148,21 @@ static irqreturn_t dwc3_imx8mp_interrupt(int irq, void *_dwc3_imx) return IRQ_HANDLED; } +static int dwc3_imx8mp_set_software_node(struct device *dev) +{ + struct property_entry props[3] = { 0 }; + int prop_idx = 0; + + props[prop_idx++] = PROPERTY_ENTRY_BOOL("xhci-missing-cas-quirk"); + props[prop_idx++] = PROPERTY_ENTRY_BOOL("xhci-skip-phy-init-quirk"); + + return device_create_managed_software_node(dev, props, NULL); +} + static int dwc3_imx8mp_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; - struct device_node *dwc3_np, *node = dev->of_node; + struct device_node *node = dev->of_node; struct dwc3_imx8mp *dwc3_imx; struct resource *res; int err, irq; @@ -178,39 +193,26 @@ static int dwc3_imx8mp_probe(struct platform_device *pdev) return PTR_ERR(dwc3_imx->glue_base); } - dwc3_imx->hsio_clk = devm_clk_get(dev, "hsio"); - if (IS_ERR(dwc3_imx->hsio_clk)) { - err = PTR_ERR(dwc3_imx->hsio_clk); - dev_err(dev, "Failed to get hsio clk, err=%d\n", err); - return err; - } - - err = clk_prepare_enable(dwc3_imx->hsio_clk); - if (err) { - dev_err(dev, "Failed to enable hsio clk, err=%d\n", err); - return err; - } - - dwc3_imx->suspend_clk = devm_clk_get(dev, "suspend"); - if (IS_ERR(dwc3_imx->suspend_clk)) { - err = PTR_ERR(dwc3_imx->suspend_clk); - dev_err(dev, "Failed to get suspend clk, err=%d\n", err); - goto disable_hsio_clk; - } + dwc3_imx->hsio_clk = devm_clk_get_enabled(dev, "hsio"); + if (IS_ERR(dwc3_imx->hsio_clk)) + return dev_err_probe(dev, PTR_ERR(dwc3_imx->hsio_clk), + "Failed to get hsio clk\n"); - err = clk_prepare_enable(dwc3_imx->suspend_clk); - if (err) { - dev_err(dev, "Failed to enable suspend clk, err=%d\n", err); - goto disable_hsio_clk; - } + dwc3_imx->suspend_clk = devm_clk_get_enabled(dev, "suspend"); + if (IS_ERR(dwc3_imx->suspend_clk)) + return dev_err_probe(dev, PTR_ERR(dwc3_imx->suspend_clk), + "Failed to get suspend clk\n"); irq = platform_get_irq(pdev, 0); - if (irq < 0) { - err = irq; - goto disable_clks; - } + if (irq < 0) + return irq; dwc3_imx->irq = irq; + struct device_node *dwc3_np __free(device_node) = of_get_compatible_child(node, + "snps,dwc3"); + if (!dwc3_np) + return dev_err_probe(dev, -ENODEV, "failed to find dwc3 core child\n"); + imx8mp_configure_glue(dwc3_imx); pm_runtime_set_active(dev); @@ -219,17 +221,17 @@ static int dwc3_imx8mp_probe(struct platform_device *pdev) if (err < 0) goto disable_rpm; - dwc3_np = of_get_compatible_child(node, "snps,dwc3"); - if (!dwc3_np) { + err = dwc3_imx8mp_set_software_node(dev); + if (err) { err = -ENODEV; - dev_err(dev, "failed to find dwc3 core child\n"); + dev_err(dev, "failed to create software node\n"); goto disable_rpm; } err = of_platform_populate(node, NULL, NULL, dev); if (err) { dev_err(&pdev->dev, "failed to create dwc3 core\n"); - goto err_node_put; + goto disable_rpm; } dwc3_imx->dwc3 = of_find_device_by_node(dwc3_np); @@ -238,7 +240,6 @@ static int dwc3_imx8mp_probe(struct platform_device *pdev) err = -ENODEV; goto depopulate; } - of_node_put(dwc3_np); err = devm_request_threaded_irq(dev, irq, NULL, dwc3_imx8mp_interrupt, IRQF_ONESHOT, dev_name(dev), dwc3_imx); @@ -254,51 +255,39 @@ static int dwc3_imx8mp_probe(struct platform_device *pdev) depopulate: of_platform_depopulate(dev); -err_node_put: - of_node_put(dwc3_np); disable_rpm: pm_runtime_disable(dev); pm_runtime_put_noidle(dev); -disable_clks: - clk_disable_unprepare(dwc3_imx->suspend_clk); -disable_hsio_clk: - clk_disable_unprepare(dwc3_imx->hsio_clk); return err; } static void dwc3_imx8mp_remove(struct platform_device *pdev) { - struct dwc3_imx8mp *dwc3_imx = platform_get_drvdata(pdev); struct device *dev = &pdev->dev; pm_runtime_get_sync(dev); of_platform_depopulate(dev); - clk_disable_unprepare(dwc3_imx->suspend_clk); - clk_disable_unprepare(dwc3_imx->hsio_clk); - pm_runtime_disable(dev); pm_runtime_put_noidle(dev); } -static int __maybe_unused dwc3_imx8mp_suspend(struct dwc3_imx8mp *dwc3_imx, - pm_message_t msg) +static int dwc3_imx8mp_suspend(struct dwc3_imx8mp *dwc3_imx, pm_message_t msg) { if (dwc3_imx->pm_suspended) return 0; /* Wakeup enable */ if (PMSG_IS_AUTO(msg) || device_may_wakeup(dwc3_imx->dev)) - dwc3_imx8mp_wakeup_enable(dwc3_imx); + dwc3_imx8mp_wakeup_enable(dwc3_imx, msg); dwc3_imx->pm_suspended = true; return 0; } -static int __maybe_unused dwc3_imx8mp_resume(struct dwc3_imx8mp *dwc3_imx, - pm_message_t msg) +static int dwc3_imx8mp_resume(struct dwc3_imx8mp *dwc3_imx, pm_message_t msg) { struct dwc3 *dwc = platform_get_drvdata(dwc3_imx->dwc3); int ret = 0; @@ -331,7 +320,7 @@ static int __maybe_unused dwc3_imx8mp_resume(struct dwc3_imx8mp *dwc3_imx, return ret; } -static int __maybe_unused dwc3_imx8mp_pm_suspend(struct device *dev) +static int dwc3_imx8mp_pm_suspend(struct device *dev) { struct dwc3_imx8mp *dwc3_imx = dev_get_drvdata(dev); int ret; @@ -349,7 +338,7 @@ static int __maybe_unused dwc3_imx8mp_pm_suspend(struct device *dev) return ret; } -static int __maybe_unused dwc3_imx8mp_pm_resume(struct device *dev) +static int dwc3_imx8mp_pm_resume(struct device *dev) { struct dwc3_imx8mp *dwc3_imx = dev_get_drvdata(dev); int ret; @@ -379,7 +368,7 @@ static int __maybe_unused dwc3_imx8mp_pm_resume(struct device *dev) return ret; } -static int __maybe_unused dwc3_imx8mp_runtime_suspend(struct device *dev) +static int dwc3_imx8mp_runtime_suspend(struct device *dev) { struct dwc3_imx8mp *dwc3_imx = dev_get_drvdata(dev); @@ -388,7 +377,7 @@ static int __maybe_unused dwc3_imx8mp_runtime_suspend(struct device *dev) return dwc3_imx8mp_suspend(dwc3_imx, PMSG_AUTO_SUSPEND); } -static int __maybe_unused dwc3_imx8mp_runtime_resume(struct device *dev) +static int dwc3_imx8mp_runtime_resume(struct device *dev) { struct dwc3_imx8mp *dwc3_imx = dev_get_drvdata(dev); @@ -398,9 +387,9 @@ static int __maybe_unused dwc3_imx8mp_runtime_resume(struct device *dev) } static const struct dev_pm_ops dwc3_imx8mp_dev_pm_ops = { - SET_SYSTEM_SLEEP_PM_OPS(dwc3_imx8mp_pm_suspend, dwc3_imx8mp_pm_resume) - SET_RUNTIME_PM_OPS(dwc3_imx8mp_runtime_suspend, - dwc3_imx8mp_runtime_resume, NULL) + SYSTEM_SLEEP_PM_OPS(dwc3_imx8mp_pm_suspend, dwc3_imx8mp_pm_resume) + RUNTIME_PM_OPS(dwc3_imx8mp_runtime_suspend, dwc3_imx8mp_runtime_resume, + NULL) }; static const struct of_device_id dwc3_imx8mp_of_match[] = { @@ -414,7 +403,7 @@ static struct platform_driver dwc3_imx8mp_driver = { .remove_new = dwc3_imx8mp_remove, .driver = { .name = "imx8mp-dwc3", - .pm = &dwc3_imx8mp_dev_pm_ops, + .pm = pm_ptr(&dwc3_imx8mp_dev_pm_ops), .of_match_table = dwc3_imx8mp_of_match, }, }; diff --git a/drivers/usb/dwc3/dwc3-octeon.c b/drivers/usb/dwc3/dwc3-octeon.c index 6010135e1acc..1a3b205367fd 100644 --- a/drivers/usb/dwc3/dwc3-octeon.c +++ b/drivers/usb/dwc3/dwc3-octeon.c @@ -419,7 +419,7 @@ static int dwc3_octeon_probe(struct platform_device *pdev) int ref_clk_sel, ref_clk_fsel, mpll_mul; int power_active_low, power_gpio; int err, len; - u32 clock_rate; + u32 clock_rate, gpio_pwr[3]; if (of_property_read_u32(node, "refclk-frequency", &clock_rate)) { dev_err(dev, "No UCTL \"refclk-frequency\"\n"); @@ -476,21 +476,10 @@ static int dwc3_octeon_probe(struct platform_device *pdev) power_gpio = DWC3_GPIO_POWER_NONE; power_active_low = 0; - if (of_find_property(node, "power", &len)) { - u32 gpio_pwr[3]; - - switch (len) { - case 8: - of_property_read_u32_array(node, "power", gpio_pwr, 2); - break; - case 12: - of_property_read_u32_array(node, "power", gpio_pwr, 3); + len = of_property_read_variable_u32_array(node, "power", gpio_pwr, 2, 3); + if (len > 0) { + if (len == 3) power_active_low = gpio_pwr[2] & 0x01; - break; - default: - dev_err(dev, "invalid power configuration\n"); - return -EINVAL; - } power_gpio = gpio_pwr[1]; } diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c index d5c77db4daa9..2a11fc0ee84f 100644 --- a/drivers/usb/dwc3/dwc3-omap.c +++ b/drivers/usb/dwc3/dwc3-omap.c @@ -522,11 +522,13 @@ static int dwc3_omap_probe(struct platform_device *pdev) if (ret) { dev_err(dev, "failed to request IRQ #%d --> %d\n", omap->irq, ret); - goto err1; + goto err2; } dwc3_omap_enable_irqs(omap); return 0; +err2: + of_platform_depopulate(dev); err1: pm_runtime_put_sync(dev); pm_runtime_disable(dev); diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c index 88fb6706a18d..c1d4b52f25b0 100644 --- a/drivers/usb/dwc3/dwc3-qcom.c +++ b/drivers/usb/dwc3/dwc3-qcom.c @@ -4,6 +4,7 @@ * Inspired by dwc3-of-simple.c */ +#include <linux/cleanup.h> #include <linux/io.h> #include <linux/of.h> #include <linux/clk.h> @@ -702,11 +703,12 @@ static int dwc3_qcom_clk_init(struct dwc3_qcom *qcom, int count) static int dwc3_qcom_of_register_core(struct platform_device *pdev) { struct dwc3_qcom *qcom = platform_get_drvdata(pdev); - struct device_node *np = pdev->dev.of_node, *dwc3_np; + struct device_node *np = pdev->dev.of_node; struct device *dev = &pdev->dev; int ret; - dwc3_np = of_get_compatible_child(np, "snps,dwc3"); + struct device_node *dwc3_np __free(device_node) = of_get_compatible_child(np, + "snps,dwc3"); if (!dwc3_np) { dev_err(dev, "failed to find dwc3 core child\n"); return -ENODEV; @@ -715,7 +717,7 @@ static int dwc3_qcom_of_register_core(struct platform_device *pdev) ret = of_platform_populate(np, NULL, NULL, dev); if (ret) { dev_err(dev, "failed to register dwc3 core - %d\n", ret); - goto node_put; + return ret; } qcom->dwc3 = of_find_device_by_node(dwc3_np); @@ -725,9 +727,6 @@ static int dwc3_qcom_of_register_core(struct platform_device *pdev) of_platform_depopulate(dev); } -node_put: - of_node_put(dwc3_np); - return ret; } @@ -736,7 +735,6 @@ static int dwc3_qcom_probe(struct platform_device *pdev) struct device_node *np = pdev->dev.of_node; struct device *dev = &pdev->dev; struct dwc3_qcom *qcom; - struct resource *res; int ret, i; bool ignore_pipe_clk; bool wakeup_source; @@ -774,9 +772,7 @@ static int dwc3_qcom_probe(struct platform_device *pdev) goto reset_assert; } - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - - qcom->qscratch_base = devm_ioremap_resource(dev, res); + qcom->qscratch_base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(qcom->qscratch_base)) { ret = PTR_ERR(qcom->qscratch_base); goto clk_disable; diff --git a/drivers/usb/dwc3/dwc3-rtk.c b/drivers/usb/dwc3/dwc3-rtk.c index 3cd6b184551c..e9c8b032c72c 100644 --- a/drivers/usb/dwc3/dwc3-rtk.c +++ b/drivers/usb/dwc3/dwc3-rtk.c @@ -6,6 +6,7 @@ * */ +#include <linux/cleanup.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/platform_device.h> @@ -173,23 +174,20 @@ static const char *const speed_names[] = { static enum usb_device_speed __get_dwc3_maximum_speed(struct device_node *np) { - struct device_node *dwc3_np; const char *maximum_speed; int ret; - dwc3_np = of_get_compatible_child(np, "snps,dwc3"); + struct device_node *dwc3_np __free(device_node) = of_get_compatible_child(np, + "snps,dwc3"); if (!dwc3_np) return USB_SPEED_UNKNOWN; ret = of_property_read_string(dwc3_np, "maximum-speed", &maximum_speed); if (ret < 0) - goto out; + return USB_SPEED_UNKNOWN; ret = match_string(speed_names, ARRAY_SIZE(speed_names), maximum_speed); -out: - of_node_put(dwc3_np); - return (ret < 0) ? USB_SPEED_UNKNOWN : ret; } @@ -276,7 +274,6 @@ static int dwc3_rtk_probe_dwc3_core(struct dwc3_rtk *rtk) struct device_node *node = dev->of_node; struct platform_device *dwc3_pdev; struct device *dwc3_dev; - struct device_node *dwc3_node; enum usb_dr_mode dr_mode; int ret = 0; @@ -290,7 +287,8 @@ static int dwc3_rtk_probe_dwc3_core(struct dwc3_rtk *rtk) return ret; } - dwc3_node = of_get_compatible_child(node, "snps,dwc3"); + struct device_node *dwc3_node __free(device_node) = of_get_compatible_child(node, + "snps,dwc3"); if (!dwc3_node) { dev_err(dev, "failed to find dwc3 core node\n"); ret = -ENODEV; @@ -301,7 +299,7 @@ static int dwc3_rtk_probe_dwc3_core(struct dwc3_rtk *rtk) if (!dwc3_pdev) { dev_err(dev, "failed to find dwc3 core platform_device\n"); ret = -ENODEV; - goto err_node_put; + goto depopulate; } dwc3_dev = &dwc3_pdev->dev; @@ -343,14 +341,11 @@ static int dwc3_rtk_probe_dwc3_core(struct dwc3_rtk *rtk) switch_usb2_role(rtk, rtk->cur_role); platform_device_put(dwc3_pdev); - of_node_put(dwc3_node); return 0; err_pdev_put: platform_device_put(dwc3_pdev); -err_node_put: - of_node_put(dwc3_node); depopulate: of_platform_depopulate(dev); @@ -363,30 +358,18 @@ static int dwc3_rtk_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct resource *res; void __iomem *regs; - int ret = 0; rtk = devm_kzalloc(dev, sizeof(*rtk), GFP_KERNEL); - if (!rtk) { - ret = -ENOMEM; - goto out; - } + if (!rtk) + return -ENOMEM; platform_set_drvdata(pdev, rtk); rtk->dev = dev; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - dev_err(dev, "missing memory resource\n"); - ret = -ENODEV; - goto out; - } - - regs = devm_ioremap_resource(dev, res); - if (IS_ERR(regs)) { - ret = PTR_ERR(regs); - goto out; - } + regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res); + if (IS_ERR(regs)) + return PTR_ERR(regs); rtk->regs = regs; rtk->regs_size = resource_size(res); @@ -394,16 +377,11 @@ static int dwc3_rtk_probe(struct platform_device *pdev) res = platform_get_resource(pdev, IORESOURCE_MEM, 1); if (res) { rtk->pm_base = devm_ioremap_resource(dev, res); - if (IS_ERR(rtk->pm_base)) { - ret = PTR_ERR(rtk->pm_base); - goto out; - } + if (IS_ERR(rtk->pm_base)) + return PTR_ERR(rtk->pm_base); } - ret = dwc3_rtk_probe_dwc3_core(rtk); - -out: - return ret; + return dwc3_rtk_probe_dwc3_core(rtk); } static void dwc3_rtk_remove(struct platform_device *pdev) diff --git a/drivers/usb/dwc3/dwc3-st.c b/drivers/usb/dwc3/dwc3-st.c index 211360eee95a..2841021f3557 100644 --- a/drivers/usb/dwc3/dwc3-st.c +++ b/drivers/usb/dwc3/dwc3-st.c @@ -14,6 +14,7 @@ * Inspired by dwc3-omap.c and dwc3-exynos.c. */ +#include <linux/cleanup.h> #include <linux/delay.h> #include <linux/interrupt.h> #include <linux/io.h> @@ -197,7 +198,7 @@ static int st_dwc3_probe(struct platform_device *pdev) struct st_dwc3 *dwc3_data; struct resource *res; struct device *dev = &pdev->dev; - struct device_node *node = dev->of_node, *child; + struct device_node *node = dev->of_node; struct platform_device *child_pdev; struct regmap *regmap; int ret; @@ -219,23 +220,26 @@ static int st_dwc3_probe(struct platform_device *pdev) dwc3_data->regmap = regmap; res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "syscfg-reg"); - if (!res) { - ret = -ENXIO; - goto undo_platform_dev_alloc; - } + if (!res) + return -ENXIO; dwc3_data->syscfg_reg_off = res->start; - dev_vdbg(&pdev->dev, "glue-logic addr 0x%pK, syscfg-reg offset 0x%x\n", + dev_vdbg(dev, "glue-logic addr 0x%pK, syscfg-reg offset 0x%x\n", dwc3_data->glue_base, dwc3_data->syscfg_reg_off); + struct device_node *child __free(device_node) = of_get_compatible_child(node, + "snps,dwc3"); + if (!child) { + dev_err(dev, "failed to find dwc3 core node\n"); + return -ENODEV; + } + dwc3_data->rstc_pwrdn = devm_reset_control_get_exclusive(dev, "powerdown"); - if (IS_ERR(dwc3_data->rstc_pwrdn)) { - dev_err(&pdev->dev, "could not get power controller\n"); - ret = PTR_ERR(dwc3_data->rstc_pwrdn); - goto undo_platform_dev_alloc; - } + if (IS_ERR(dwc3_data->rstc_pwrdn)) + return dev_err_probe(dev, PTR_ERR(dwc3_data->rstc_pwrdn), + "could not get power controller\n"); /* Manage PowerDown */ reset_control_deassert(dwc3_data->rstc_pwrdn); @@ -243,37 +247,29 @@ static int st_dwc3_probe(struct platform_device *pdev) dwc3_data->rstc_rst = devm_reset_control_get_shared(dev, "softreset"); if (IS_ERR(dwc3_data->rstc_rst)) { - dev_err(&pdev->dev, "could not get reset controller\n"); - ret = PTR_ERR(dwc3_data->rstc_rst); + ret = dev_err_probe(dev, PTR_ERR(dwc3_data->rstc_rst), + "could not get reset controller\n"); goto undo_powerdown; } /* Manage SoftReset */ reset_control_deassert(dwc3_data->rstc_rst); - child = of_get_compatible_child(node, "snps,dwc3"); - if (!child) { - dev_err(&pdev->dev, "failed to find dwc3 core node\n"); - ret = -ENODEV; - goto err_node_put; - } - /* Allocate and initialize the core */ ret = of_platform_populate(node, NULL, NULL, dev); if (ret) { dev_err(dev, "failed to add dwc3 core\n"); - goto err_node_put; + goto undo_softreset; } child_pdev = of_find_device_by_node(child); if (!child_pdev) { dev_err(dev, "failed to find dwc3 core device\n"); ret = -ENODEV; - goto err_node_put; + goto depopulate; } dwc3_data->dr_mode = usb_get_dr_mode(&child_pdev->dev); - of_node_put(child); platform_device_put(child_pdev); /* @@ -285,7 +281,7 @@ static int st_dwc3_probe(struct platform_device *pdev) ret = st_dwc3_drd_init(dwc3_data); if (ret) { dev_err(dev, "drd initialisation failed\n"); - goto undo_softreset; + goto depopulate; } /* ST glue logic init */ @@ -294,14 +290,12 @@ static int st_dwc3_probe(struct platform_device *pdev) platform_set_drvdata(pdev, dwc3_data); return 0; -err_node_put: - of_node_put(child); +depopulate: + of_platform_depopulate(dev); undo_softreset: reset_control_assert(dwc3_data->rstc_rst); undo_powerdown: reset_control_assert(dwc3_data->rstc_pwrdn); -undo_platform_dev_alloc: - platform_device_put(pdev); return ret; } diff --git a/drivers/usb/dwc3/dwc3-xilinx.c b/drivers/usb/dwc3/dwc3-xilinx.c index bb4d894c16e9..b5e5be424ce9 100644 --- a/drivers/usb/dwc3/dwc3-xilinx.c +++ b/drivers/usb/dwc3/dwc3-xilinx.c @@ -285,11 +285,8 @@ static int dwc3_xlnx_probe(struct platform_device *pdev) return -ENOMEM; regs = devm_platform_ioremap_resource(pdev, 0); - if (IS_ERR(regs)) { - ret = PTR_ERR(regs); - dev_err_probe(dev, ret, "failed to map registers\n"); - return ret; - } + if (IS_ERR(regs)) + return dev_err_probe(dev, PTR_ERR(regs), "failed to map registers\n"); match = of_match_node(dwc3_xlnx_of_match, pdev->dev.of_node); @@ -327,9 +324,14 @@ static int dwc3_xlnx_probe(struct platform_device *pdev) goto err_pm_set_suspended; pm_suspend_ignore_children(dev, false); - return pm_runtime_resume_and_get(dev); + ret = pm_runtime_resume_and_get(dev); + if (ret < 0) + goto err_pm_set_suspended; + + return 0; err_pm_set_suspended: + of_platform_depopulate(dev); pm_runtime_set_suspended(dev); err_clk_put: diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c index d96ffbe52039..c9533a99e47c 100644 --- a/drivers/usb/dwc3/ep0.c +++ b/drivers/usb/dwc3/ep0.c @@ -232,7 +232,8 @@ void dwc3_ep0_stall_and_restart(struct dwc3 *dwc) /* stall is always issued on EP0 */ dep = dwc->eps[0]; __dwc3_gadget_ep_set_halt(dep, 1, false); - dep->flags = DWC3_EP_ENABLED; + dep->flags &= DWC3_EP_RESOURCE_ALLOCATED; + dep->flags |= DWC3_EP_ENABLED; dwc->delayed_status = false; if (!list_empty(&dep->pending_list)) { diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 89fc690fdf34..291bc549935b 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -287,6 +287,23 @@ static int __dwc3_gadget_wakeup(struct dwc3 *dwc, bool async); * * Caller should handle locking. This function will issue @cmd with given * @params to @dep and wait for its completion. + * + * According to the programming guide, if the link state is in L1/L2/U3, + * then sending the Start Transfer command may not complete. The + * programming guide suggested to bring the link state back to ON/U0 by + * performing remote wakeup prior to sending the command. However, don't + * initiate remote wakeup when the user/function does not send wakeup + * request via wakeup ops. Send the command when it's allowed. + * + * Notes: + * For L1 link state, issuing a command requires the clearing of + * GUSB2PHYCFG.SUSPENDUSB2, which turns on the signal required to complete + * the given command (usually within 50us). This should happen within the + * command timeout set by driver. No additional step is needed. + * + * For L2 or U3 link state, the gadget is in USB suspend. Care should be + * taken when sending Start Transfer command to ensure that it's done after + * USB resume. */ int dwc3_send_gadget_ep_cmd(struct dwc3_ep *dep, unsigned int cmd, struct dwc3_gadget_ep_cmd_params *params) @@ -327,30 +344,6 @@ int dwc3_send_gadget_ep_cmd(struct dwc3_ep *dep, unsigned int cmd, dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); } - if (DWC3_DEPCMD_CMD(cmd) == DWC3_DEPCMD_STARTTRANSFER) { - int link_state; - - /* - * Initiate remote wakeup if the link state is in U3 when - * operating in SS/SSP or L1/L2 when operating in HS/FS. If the - * link state is in U1/U2, no remote wakeup is needed. The Start - * Transfer command will initiate the link recovery. - */ - link_state = dwc3_gadget_get_link_state(dwc); - switch (link_state) { - case DWC3_LINK_STATE_U2: - if (dwc->gadget->speed >= USB_SPEED_SUPER) - break; - - fallthrough; - case DWC3_LINK_STATE_U3: - ret = __dwc3_gadget_wakeup(dwc, false); - dev_WARN_ONCE(dwc->dev, ret, "wakeup failed --> %d\n", - ret); - break; - } - } - /* * For some commands such as Update Transfer command, DEPCMDPARn * registers are reserved. Since the driver often sends Update Transfer |