// SPDX-License-Identifier: GPL-1.0+ /* * Renesas USB driver * * Copyright (C) 2011 Renesas Solutions Corp. * Copyright (C) 2019 Renesas Electronics Corporation * Kuninori Morimoto */ #include #include #include #include #include #include #include #include #include #include #include #include "common.h" #include "rcar2.h" #include "rcar3.h" #include "rza.h" /* * image of renesas_usbhs * * ex) gadget case * mod.c * mod_gadget.c * mod_host.c pipe.c fifo.c * * +-------+ +-----------+ * | pipe0 |------>| fifo pio | * +------------+ +-------+ +-----------+ * | mod_gadget |=====> | pipe1 |--+ * +------------+ +-------+ | +-----------+ * | pipe2 | | +-| fifo dma0 | * +------------+ +-------+ | | +-----------+ * | mod_host | | pipe3 |<-|--+ * +------------+ +-------+ | +-----------+ * | .... | +--->| fifo dma1 | * | .... | +-----------+ */ /* * platform call back * * renesas usb support platform callback function. * Below macro call it. * if platform doesn't have callback, it return 0 (no error) */ #define usbhs_platform_call(priv, func, args...)\ (!(priv) ? -ENODEV : \ !((priv)->pfunc->func) ? 0 : \ (priv)->pfunc->func(args)) /* * common functions */ u16 usbhs_read(struct usbhs_priv *priv, u32 reg) { return ioread16(priv->base + reg); } void usbhs_write(struct usbhs_priv *priv, u32 reg, u16 data) { iowrite16(data, priv->base + reg); } void usbhs_bset(struct usbhs_priv *priv, u32 reg, u16 mask, u16 data) { u16 val = usbhs_read(priv, reg); val &= ~mask; val |= data & mask; usbhs_write(priv, reg, val); } struct usbhs_priv *usbhs_pdev_to_priv(struct platform_device *pdev) { return dev_get_drvdata(&pdev->dev); } int usbhs_get_id_as_gadget(struct platform_device *pdev) { return USBHS_GADGET; } /* * syscfg functions */ static void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable) { usbhs_bset(priv, SYSCFG, SCKE, enable ? SCKE : 0); } void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable) { u16 mask = DCFM | DRPD | DPRPU | HSE | USBE; u16 val = DCFM | DRPD | HSE | USBE; /* * if enable * * - select Host mode * - D+ Line/D- Line Pull-down */ usbhs_bset(priv, SYSCFG, mask, enable ? val : 0); } void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable) { u16 mask = DCFM | DRPD | DPRPU | HSE | USBE; u16 val = HSE | USBE; /* CNEN bit is required for function operation */ if (usbhs_get_dparam(priv, has_cnen)) { mask |= CNEN; val |= CNEN; } /* * if enable * * - select Function mode * - D+ Line Pull-up is disabled * When D+ Line Pull-up is enabled, * calling usbhs_sys_function_pullup(,1) */ usbhs_bset(priv, SYSCFG, mask, enable ? val : 0); } void usbhs_sys_function_pullup(struct usbhs_priv *priv, int enable) { usbhs_bset(priv, SYSCFG, DPRPU, enable ? DPRPU : 0); } void usbhs_sys_set_test_mode(struct usbhs_priv *priv, u16 mode) { usbhs_write(priv, TESTMODE, mode); } /* * frame functions */ int usbhs_frame_get_num(struct usbhs_priv *priv) { return usbhs_read(priv, FRMNUM) & FRNM_MASK; } /* * usb request functions */ void usbhs_usbreq_get_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req) { u16 val; val = usbhs_read(priv, USBREQ); req->bRequest = (val >> 8) & 0xFF; req->bRequestType = (val >> 0) & 0xFF; req->wValue = usbhs_read(priv, USBVAL); req->wIndex = usbhs_read(priv, USBINDX); req->wLength = usbhs_read(priv, USBLENG); } void usbhs_usbreq_set_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req) { usbhs_write(priv, USBREQ, (req->bRequest << 8) | req->bRequestType); usbhs_write(priv, USBVAL, req->wValue); usbhs_write(priv, USBINDX, req->wIndex); usbhs_write(priv, USBLENG, req->wLength); usbhs_bset(priv, DCPCTR, SUREQ, SUREQ); } /* * bus/vbus functions */ void usbhs_bus_send_sof_enable(struct usbhs_priv *priv) { u16 status = usbhs_read(priv, DVSTCTR) & (USBRST | UACT); if (status != USBRST) { struct device *dev = usbhs_priv_to_dev(priv); dev_err(dev, "usbhs should be reset\n"); } usbhs_bset(priv, DVSTCTR, (USBRST | UACT), UACT); } void usbhs_bus_send_reset(struct usbhs_priv *priv) { usbhs_bset(priv, DVSTCTR, (USBRST | UACT), USBRST); } int usbhs_bus_get_speed(struct usbhs_priv *priv) { u16 dvstctr = usbhs_read(priv, DVSTCTR); switch (RHST & dvstctr) { case RHST_LOW_SPEED: return USB_SPEED_LOW; case RHST_FULL_SPEED: return USB_SPEED_FULL; case RHST_HIGH_SPEED: return USB_SPEED_HIGH; } return USB_SPEED_UNKNOWN; } int usbhs_vbus_ctrl(struct usbhs_priv *priv, int enable) { struct platform_device *pdev = usbhs_priv_to_pdev(priv); return usbhs_platform_call(priv, set_vbus, pdev, enable); } static void usbhsc_bus_init(struct usbhs_priv *priv) { usbhs_write(priv, DVSTCTR, 0); usbhs_vbus_ctrl(priv, 0); } /* * device configuration */ int usbhs_set_device_config(struct usbhs_priv *priv, int devnum, u16 upphub, u16 hubport, u16 speed) { struct device *dev = usbhs_priv_to_dev(priv); u16 usbspd = 0; u32 reg = DEVADD0 + (2 * devnum); if (devnum > 10) { dev_err(dev, "cannot set speed to unknown device %d\n", devnum); return -EIO; } if (upphub > 0xA) { dev_err(dev, "unsupported hub number %d\n", upphub); return -EIO; } switch (speed) { case USB_SPEED_LOW: usbspd = USBSPD_SPEED_LOW; break; case USB_SPEED_FULL: usbspd = USBSPD_SPEED_FULL; break; case USB_SPEED_HIGH: usbspd = USBSPD_SPEED_HIGH; break; default: dev_err(dev, "unsupported speed %d\n", speed); return -EIO; } usbhs_write(priv, reg, UPPHUB(upphub) | HUBPORT(hubport)| USBSPD(usbspd)); return 0; } /* * interrupt functions */ void usbhs_xxxsts_clear(struct usbhs_priv *priv, u16 sts_reg, u16 bit) { u16 pipe_mask = (u16)GENMASK(usbhs_get_dparam(priv, pipe_size), 0); usbhs_write(priv, sts_reg, ~(1 << bit) & pipe_mask); } /* * local functions */ static void usbhsc_set_buswait(struct usbhs_priv *priv) { int wait = usbhs_get_dparam(priv, buswait_bwait); /* set bus wait if platform have */ if (wait) usbhs_bset(priv, BUSWAIT, 0x000F, wait); } static bool usbhsc_is_multi_clks(struct usbhs_priv *priv) { return priv->dparam.multi_clks; } static int usbhsc_clk_get(struct device *dev, struct usbhs_priv *priv) { if (!usbhsc_is_multi_clks(priv)) return 0; /* The first clock should exist */ priv->clks[0] = of_clk_get(dev_of_node(dev), 0); if (IS_ERR(priv->clks[0])) return PTR_ERR(priv->clks[0]); /* * To backward compatibility with old DT, this driver checks the return * value if it's -ENOENT or not. */ priv->clks[1] = of_clk_get(dev_of_node(dev), 1); if (PTR_ERR(priv->clks[1]) == -ENOENT) priv->clks[1] = NULL; else if (IS_ERR(priv->clks[1])) return PTR_ERR(priv->clks[1]); return 0; } static void usbhsc_clk_put(struct usbhs_priv *priv) { int i; if (!usbhsc_is_multi_clks(priv)) return; for (i = 0; i < ARRAY_SIZE(priv->clks); i++) clk_put(priv->clks[i]); } static int usbhsc_clk_prepare_enable(struct usbhs_priv *priv) { int i, ret; if (!usbhsc_is_multi_clks(priv)) return 0; for (i = 0; i < ARRAY_SIZE(priv->clks); i++) { ret = clk_prepare_enable(priv->clks[i]); if (ret) { while (--i >= 0) clk_disable_unprepare(priv->clks[i]); return ret; } } return ret; } static void usbhsc_clk_disable_unprepare(struct usbhs_priv *priv) { int i; if (!usbhsc_is_multi_clks(priv)) return; for (i = 0; i < ARRAY_SIZE(priv->clks); i++) clk_disable_unprepare(priv->clks[i]); } /* * platform default param */ /* commonly used on old SH-Mobile SoCs */ static struct renesas_usbhs_driver_pipe_config usbhsc_default_pipe[] = { RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false), RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, false), RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x18, false), RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x28, true), RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x38, true), RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true), RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false), RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false), RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false), RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x07, false), }; /* commonly used on newer SH-Mobile and R-Car SoCs */ static struct renesas_usbhs_driver_pipe_config usbhsc_new_pipe[] = { RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false), RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, true), RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x28, true), RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true), RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x58, true), RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x68, true), RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false), RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false), RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false), RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x78, true), RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x88, true), RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x98, true), RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xa8, true), RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xb8, true), RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xc8, true), RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xd8, true), }; /* * power control */ static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable) { struct platform_device *pdev = usbhs_priv_to_pdev(priv); struct device *dev = usbhs_priv_to_dev(priv); if (enable) { /* enable PM */ pm_runtime_get_sync(dev); /* enable clks */ if (usbhsc_clk_prepare_enable(priv)) return; /* enable platform power */ usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable); /* USB on */ usbhs_sys_clock_ctrl(priv, enable); } else { /* USB off */ usbhs_sys_clock_ctrl(priv, enable); /* disable platform power */ usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable); /* disable clks */ usbhsc_clk_disable_unprepare(priv); /* disable PM */ pm_runtime_put_sync(dev); } } /* * hotplug */ static void usbhsc_hotplug(struct usbhs_priv *priv) { struct platform_device *pdev = usbhs_priv_to_pdev(priv); struct usbhs_mod *mod = usbhs_mod_get_current(priv); int id; int enable; int cable; int ret; /* * get vbus status from platform */ enable = usbhs_mod_info_call(priv, get_vbus, pdev); /* * get id from platform */ id = usbhs_platform_call(priv, get_id, pdev); if (enable && !mod) { if (priv->edev) { cable = extcon_get_state(priv->edev, EXTCON_USB_HOST); if ((cable > 0 && id != USBHS_HOST) || (!cable && id != USBHS_GADGET)) { dev_info(&pdev->dev, "USB cable plugged in doesn't match the selected role!\n"); return; } } ret = usbhs_mod_change(priv, id); if (ret < 0) return; dev_dbg(&pdev->dev, "%s enable\n", __func__); /* power on */ if (usbhs_get_dparam(priv, runtime_pwctrl)) usbhsc_power_ctrl(priv, enable); /* bus init */ usbhsc_set_buswait(priv); usbhsc_bus_init(priv); /* module start */ usbhs_mod_call(priv, start, priv); } else if (!enable && mod) { dev_dbg(&pdev->dev, "%s disable\n", __func__); /* module stop */ usbhs_mod_call(priv, stop, priv); /* bus init */ usbhsc_bus_init(priv); /* power off */ if (usbhs_get_dparam(priv, runtime_pwctrl)) usbhsc_power_ctrl(priv, enable); usbhs_mod_change(priv, -1); /* reset phy for next connection */ usbhs_platform_call(priv, phy_reset, pdev); } } /* * notify hotplug */ static void usbhsc_notify_hotplug(struct work_struct *work) { struct usbhs_priv *priv = container_of(work, struct usbhs_priv, notify_hotplug_work.work); usbhsc_hotplug(priv); } int usbhsc_schedule_notify_hotplug(struct platform_device *pdev) { struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); int delay = usbhs_get_dparam(priv, detection_delay); /* * This functions will be called in interrupt. * To make sure safety context, * use workqueue for usbhs_notify_hotplug */ schedule_delayed_work(&priv->notify_hotplug_work, msecs_to_jiffies(delay)); return 0; } /* * platform functions */ static const struct of_device_id usbhs_of_match[] = { { .compatible = "renesas,usbhs-r8a774c0", .data = &usbhs_rcar_gen3_with_pll_plat_info, }, { .compatible = "renesas,usbhs-r8a7790", .data = &usbhs_rcar_gen2_plat_info, }, { .compatible = "renesas,usbhs-r8a7791", .data = &usbhs_rcar_gen2_plat_info, }, { .compatible = "renesas,usbhs-r8a7794", .data = &usbhs_rcar_gen2_plat_info, }, { .compatible = "renesas,usbhs-r8a7795", .data = &usbhs_rcar_gen3_plat_info, }, { .compatible = "renesas,usbhs-r8a7796", .data = &usbhs_rcar_gen3_plat_info, }, { .compatible = "renesas,usbhs-r8a77990", .data = &usbhs_rcar_gen3_with_pll_plat_info, }, { .compatible = "renesas,usbhs-r8a77995", .data = &usbhs_rcar_gen3_with_pll_plat_info, }, { .compatible = "renesas,rcar-gen2-usbhs", .data = &usbhs_rcar_gen2_plat_info, }, { .compatible = "renesas,rcar-gen3-usbhs", .data = &usbhs_rcar_gen3_plat_info, }, { .compatible = "renesas,rza1-usbhs", .data = &usbhs_rza1_plat_info, }, { .compatible = "renesas,rza2-usbhs", .data = &usbhs_rza2_plat_info, }, { }, }; MODULE_DEVICE_TABLE(of, usbhs_of_match); static int usbhs_probe(struct platform_device *pdev) { const struct renesas_usbhs_platform_info *info; struct usbhs_priv *priv; struct resource *res, *irq_res; struct device *dev = &pdev->dev; int ret, gpio; u32 tmp; /* check device node */ if (dev_of_node(dev)) info = of_device_get_match_data(dev); else info = renesas_usbhs_get_info(pdev); /* check platform information */ if (!info) { dev_err(dev, "no platform information\n"); return -EINVAL; } /* platform data */ irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); if (!irq_res) { dev_err(dev, "Not enough Renesas USB platform resources.\n"); return -ENODEV; } /* usb private data */ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); priv->base = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(priv->base)) return PTR_ERR(priv->base); if (of_property_read_bool(dev_of_node(dev), "extcon")) { priv->edev = extcon_get_edev_by_phandle(dev, 0); if (IS_ERR(priv->edev)) return PTR_ERR(priv->edev); } priv->rsts = devm_reset_control_array_get_optional_shared(dev); if (IS_ERR(priv->rsts)) return PTR_ERR(priv->rsts); /* * care platform info */ priv->dparam = info->driver_param; if (!info->platform_callback.get_id) { dev_err(dev, "no platform callbacks\n"); return -EINVAL; } priv->pfunc = &info->platform_callback; /* set default param if platform doesn't have */ if (usbhs_get_dparam(priv, has_new_pipe_configs)) { priv->dparam.pipe_configs = usbhsc_new_pipe; priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_new_pipe); } else if (!priv->dparam.pipe_configs) { priv->dparam.pipe_configs = usbhsc_default_pipe; priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe); } if (!priv->dparam.pio_dma_border) priv->dparam.pio_dma_border = 64; /* 64byte */ if (!of_property_read_u32(dev_of_node(dev), "renesas,buswait", &tmp)) priv->dparam.buswait_bwait = tmp; gpio = of_get_named_gpio_flags(dev_of_node(dev), "renesas,enable-gpio", 0, NULL); if (gpio > 0) priv->dparam.enable_gpio = gpio; /* FIXME */ /* runtime power control ? */ if (priv->pfunc->get_vbus) usbhs_get_dparam(priv, runtime_pwctrl) = 1; /* * priv settings */ priv->irq = irq_res->start; if (irq_res->flags & IORESOURCE_IRQ_SHAREABLE) priv->irqflags = IRQF_SHARED; priv->pdev = pdev; INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug); spin_lock_init(usbhs_priv_to_lock(priv)); /* call pipe and module init */ ret = usbhs_pipe_probe(priv); if (ret < 0) return ret; ret = usbhs_fifo_probe(priv); if (ret < 0) goto probe_end_pipe_exit; ret = usbhs_mod_probe(priv); if (ret < 0) goto probe_end_fifo_exit; /* dev_set_drvdata should be called after usbhs_mod_init */ platform_set_drvdata(pdev, priv); ret = reset_control_deassert(priv->rsts); if (ret) goto probe_fail_rst; ret = usbhsc_clk_get(dev, priv); if (ret) goto probe_fail_clks; /* * deviece reset here because * USB device might be used in boot loader. */ usbhs_sys_clock_ctrl(priv, 0); /* check GPIO determining if USB function should be enabled */ if (priv->dparam.enable_gpio) { gpio_request_one(priv->dparam.enable_gpio, GPIOF_IN, NULL); ret = !gpio_get_value(priv->dparam.enable_gpio); gpio_free(priv->dparam.enable_gpio); if (ret) { dev_warn(dev, "USB function not selected (GPIO %d)\n", priv->dparam.enable_gpio); ret = -ENOTSUPP; goto probe_end_mod_exit; } } /* * platform call * * USB phy setup might depend on CPU/Board. * If platform has its callback functions, * call it here. */ ret = usbhs_platform_call(priv, hardware_init, pdev); if (ret < 0) { dev_err(dev, "platform init failed.\n"); goto probe_end_mod_exit; } /* reset phy for connection */ usbhs_platform_call(priv, phy_reset, pdev); /* power control */ pm_runtime_enable(dev); if (!usbhs_get_dparam(priv, runtime_pwctrl)) { usbhsc_power_ctrl(priv, 1); usbhs_mod_autonomy_mode(priv); } else { usbhs_mod_non_autonomy_mode(priv); } /* * manual call notify_hotplug for cold plug */ usbhsc_schedule_notify_hotplug(pdev); dev_info(dev, "probed\n"); return ret; probe_end_mod_exit: usbhsc_clk_put(priv); probe_fail_clks: reset_control_assert(priv->rsts); probe_fail_rst: usbhs_mod_remove(priv); probe_end_fifo_exit: usbhs_fifo_remove(priv); probe_end_pipe_exit: usbhs_pipe_remove(priv); dev_info(dev, "probe failed (%d)\n", ret); return ret; } static int usbhs_remove(struct platform_device *pdev) { struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); dev_dbg(&pdev->dev, "usb remove\n"); /* power off */ if (!usbhs_get_dparam(priv, runtime_pwctrl)) usbhsc_power_ctrl(priv, 0); pm_runtime_disable(&pdev->dev); usbhs_platform_call(priv, hardware_exit, pdev); usbhsc_clk_put(priv); reset_control_assert(priv->rsts); usbhs_mod_remove(priv); usbhs_fifo_remove(priv); usbhs_pipe_remove(priv); return 0; } static __maybe_unused int usbhsc_suspend(struct device *dev) { struct usbhs_priv *priv = dev_get_drvdata(dev); struct usbhs_mod *mod = usbhs_mod_get_current(priv); if (mod) { usbhs_mod_call(priv, stop, priv); usbhs_mod_change(priv, -1); } if (mod || !usbhs_get_dparam(priv, runtime_pwctrl)) usbhsc_power_ctrl(priv, 0); return 0; } static __maybe_unused int usbhsc_resume(struct device *dev) { struct usbhs_priv *priv = dev_get_drvdata(dev); struct platform_device *pdev = usbhs_priv_to_pdev(priv); if (!usbhs_get_dparam(priv, runtime_pwctrl)) { usbhsc_power_ctrl(priv, 1); usbhs_mod_autonomy_mode(priv); } usbhs_platform_call(priv, phy_reset, pdev); usbhsc_schedule_notify_hotplug(pdev); return 0; } static SIMPLE_DEV_PM_OPS(usbhsc_pm_ops, usbhsc_suspend, usbhsc_resume); static struct platform_driver renesas_usbhs_driver = { .driver = { .name = "renesas_usbhs", .pm = &usbhsc_pm_ops, .of_match_table = of_match_ptr(usbhs_of_match), }, .probe = usbhs_probe, .remove = usbhs_remove, }; module_platform_driver(renesas_usbhs_driver); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Renesas USB driver"); MODULE_AUTHOR("Kuninori Morimoto ");