1*5fd54aceSGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0 272246da4SFelipe Balbi /** 372246da4SFelipe Balbi * core.c - DesignWare USB3 DRD Controller Core file 472246da4SFelipe Balbi * 572246da4SFelipe Balbi * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com 672246da4SFelipe Balbi * 772246da4SFelipe Balbi * Authors: Felipe Balbi <balbi@ti.com>, 872246da4SFelipe Balbi * Sebastian Andrzej Siewior <bigeasy@linutronix.de> 972246da4SFelipe Balbi * 105945f789SFelipe Balbi * This program is free software: you can redistribute it and/or modify 115945f789SFelipe Balbi * it under the terms of the GNU General Public License version 2 of 125945f789SFelipe Balbi * the License as published by the Free Software Foundation. 1372246da4SFelipe Balbi * 145945f789SFelipe Balbi * This program is distributed in the hope that it will be useful, 155945f789SFelipe Balbi * but WITHOUT ANY WARRANTY; without even the implied warranty of 165945f789SFelipe Balbi * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 175945f789SFelipe Balbi * GNU General Public License for more details. 1872246da4SFelipe Balbi * 195945f789SFelipe Balbi * You should have received a copy of the GNU General Public License 205945f789SFelipe Balbi * along with this program. If not, see <http://www.gnu.org/licenses/>. 2172246da4SFelipe Balbi */ 2272246da4SFelipe Balbi 23fa0ea13eSFelipe Balbi #include <linux/version.h> 24a72e658bSFelipe Balbi #include <linux/module.h> 2572246da4SFelipe Balbi #include <linux/kernel.h> 2672246da4SFelipe Balbi #include <linux/slab.h> 2772246da4SFelipe Balbi #include <linux/spinlock.h> 2872246da4SFelipe Balbi #include <linux/platform_device.h> 2972246da4SFelipe Balbi #include <linux/pm_runtime.h> 3072246da4SFelipe Balbi #include <linux/interrupt.h> 3172246da4SFelipe Balbi #include <linux/ioport.h> 3272246da4SFelipe Balbi #include <linux/io.h> 3372246da4SFelipe Balbi #include <linux/list.h> 3472246da4SFelipe Balbi #include <linux/delay.h> 3572246da4SFelipe Balbi #include <linux/dma-mapping.h> 36457e84b6SFelipe Balbi #include <linux/of.h> 37404905a6SHeikki Krogerus #include <linux/acpi.h> 386344475fSSekhar Nori #include <linux/pinctrl/consumer.h> 3972246da4SFelipe Balbi 4072246da4SFelipe Balbi #include <linux/usb/ch9.h> 4172246da4SFelipe Balbi #include <linux/usb/gadget.h> 42f7e846f0SFelipe Balbi #include <linux/usb/of.h> 43a45c82b8SRuchika Kharwar #include <linux/usb/otg.h> 4472246da4SFelipe Balbi 4572246da4SFelipe Balbi #include "core.h" 4672246da4SFelipe Balbi #include "gadget.h" 4772246da4SFelipe Balbi #include "io.h" 4872246da4SFelipe Balbi 4972246da4SFelipe Balbi #include "debug.h" 5072246da4SFelipe Balbi 51fc8bb91bSFelipe Balbi #define DWC3_DEFAULT_AUTOSUSPEND_DELAY 5000 /* ms */ 528300dd23SFelipe Balbi 539d6173e1SThinh Nguyen /** 549d6173e1SThinh Nguyen * dwc3_get_dr_mode - Validates and sets dr_mode 559d6173e1SThinh Nguyen * @dwc: pointer to our context structure 569d6173e1SThinh Nguyen */ 579d6173e1SThinh Nguyen static int dwc3_get_dr_mode(struct dwc3 *dwc) 589d6173e1SThinh Nguyen { 599d6173e1SThinh Nguyen enum usb_dr_mode mode; 609d6173e1SThinh Nguyen struct device *dev = dwc->dev; 619d6173e1SThinh Nguyen unsigned int hw_mode; 629d6173e1SThinh Nguyen 639d6173e1SThinh Nguyen if (dwc->dr_mode == USB_DR_MODE_UNKNOWN) 649d6173e1SThinh Nguyen dwc->dr_mode = USB_DR_MODE_OTG; 659d6173e1SThinh Nguyen 669d6173e1SThinh Nguyen mode = dwc->dr_mode; 679d6173e1SThinh Nguyen hw_mode = DWC3_GHWPARAMS0_MODE(dwc->hwparams.hwparams0); 689d6173e1SThinh Nguyen 699d6173e1SThinh Nguyen switch (hw_mode) { 709d6173e1SThinh Nguyen case DWC3_GHWPARAMS0_MODE_GADGET: 719d6173e1SThinh Nguyen if (IS_ENABLED(CONFIG_USB_DWC3_HOST)) { 729d6173e1SThinh Nguyen dev_err(dev, 739d6173e1SThinh Nguyen "Controller does not support host mode.\n"); 749d6173e1SThinh Nguyen return -EINVAL; 759d6173e1SThinh Nguyen } 769d6173e1SThinh Nguyen mode = USB_DR_MODE_PERIPHERAL; 779d6173e1SThinh Nguyen break; 789d6173e1SThinh Nguyen case DWC3_GHWPARAMS0_MODE_HOST: 799d6173e1SThinh Nguyen if (IS_ENABLED(CONFIG_USB_DWC3_GADGET)) { 809d6173e1SThinh Nguyen dev_err(dev, 819d6173e1SThinh Nguyen "Controller does not support device mode.\n"); 829d6173e1SThinh Nguyen return -EINVAL; 839d6173e1SThinh Nguyen } 849d6173e1SThinh Nguyen mode = USB_DR_MODE_HOST; 859d6173e1SThinh Nguyen break; 869d6173e1SThinh Nguyen default: 879d6173e1SThinh Nguyen if (IS_ENABLED(CONFIG_USB_DWC3_HOST)) 889d6173e1SThinh Nguyen mode = USB_DR_MODE_HOST; 899d6173e1SThinh Nguyen else if (IS_ENABLED(CONFIG_USB_DWC3_GADGET)) 909d6173e1SThinh Nguyen mode = USB_DR_MODE_PERIPHERAL; 919d6173e1SThinh Nguyen } 929d6173e1SThinh Nguyen 939d6173e1SThinh Nguyen if (mode != dwc->dr_mode) { 949d6173e1SThinh Nguyen dev_warn(dev, 959d6173e1SThinh Nguyen "Configuration mismatch. dr_mode forced to %s\n", 969d6173e1SThinh Nguyen mode == USB_DR_MODE_HOST ? "host" : "gadget"); 979d6173e1SThinh Nguyen 989d6173e1SThinh Nguyen dwc->dr_mode = mode; 999d6173e1SThinh Nguyen } 1009d6173e1SThinh Nguyen 1019d6173e1SThinh Nguyen return 0; 1029d6173e1SThinh Nguyen } 1039d6173e1SThinh Nguyen 10441ce1456SRoger Quadros static void dwc3_event_buffers_cleanup(struct dwc3 *dwc); 10541ce1456SRoger Quadros static int dwc3_event_buffers_setup(struct dwc3 *dwc); 10641ce1456SRoger Quadros 10741ce1456SRoger Quadros static void dwc3_set_prtcap(struct dwc3 *dwc, u32 mode) 1083140e8cbSSebastian Andrzej Siewior { 1093140e8cbSSebastian Andrzej Siewior u32 reg; 1103140e8cbSSebastian Andrzej Siewior 1113140e8cbSSebastian Andrzej Siewior reg = dwc3_readl(dwc->regs, DWC3_GCTL); 1123140e8cbSSebastian Andrzej Siewior reg &= ~(DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_OTG)); 1133140e8cbSSebastian Andrzej Siewior reg |= DWC3_GCTL_PRTCAPDIR(mode); 1143140e8cbSSebastian Andrzej Siewior dwc3_writel(dwc->regs, DWC3_GCTL, reg); 11541ce1456SRoger Quadros } 1166b3261a2SRoger Quadros 11741ce1456SRoger Quadros static void __dwc3_set_mode(struct work_struct *work) 11841ce1456SRoger Quadros { 11941ce1456SRoger Quadros struct dwc3 *dwc = work_to_dwc(work); 12041ce1456SRoger Quadros unsigned long flags; 12141ce1456SRoger Quadros int ret; 12241ce1456SRoger Quadros 12341ce1456SRoger Quadros if (!dwc->desired_dr_role) 12441ce1456SRoger Quadros return; 12541ce1456SRoger Quadros 12641ce1456SRoger Quadros if (dwc->desired_dr_role == dwc->current_dr_role) 12741ce1456SRoger Quadros return; 12841ce1456SRoger Quadros 12941ce1456SRoger Quadros if (dwc->dr_mode != USB_DR_MODE_OTG) 13041ce1456SRoger Quadros return; 13141ce1456SRoger Quadros 13241ce1456SRoger Quadros switch (dwc->current_dr_role) { 13341ce1456SRoger Quadros case DWC3_GCTL_PRTCAP_HOST: 13441ce1456SRoger Quadros dwc3_host_exit(dwc); 13541ce1456SRoger Quadros break; 13641ce1456SRoger Quadros case DWC3_GCTL_PRTCAP_DEVICE: 13741ce1456SRoger Quadros dwc3_gadget_exit(dwc); 13841ce1456SRoger Quadros dwc3_event_buffers_cleanup(dwc); 13941ce1456SRoger Quadros break; 14041ce1456SRoger Quadros default: 14141ce1456SRoger Quadros break; 14241ce1456SRoger Quadros } 14341ce1456SRoger Quadros 14441ce1456SRoger Quadros spin_lock_irqsave(&dwc->lock, flags); 14541ce1456SRoger Quadros 14641ce1456SRoger Quadros dwc3_set_prtcap(dwc, dwc->desired_dr_role); 14741ce1456SRoger Quadros 14841ce1456SRoger Quadros dwc->current_dr_role = dwc->desired_dr_role; 14941ce1456SRoger Quadros 15041ce1456SRoger Quadros spin_unlock_irqrestore(&dwc->lock, flags); 15141ce1456SRoger Quadros 15241ce1456SRoger Quadros switch (dwc->desired_dr_role) { 15341ce1456SRoger Quadros case DWC3_GCTL_PRTCAP_HOST: 15441ce1456SRoger Quadros ret = dwc3_host_init(dwc); 155958d1a4cSFelipe Balbi if (ret) { 15641ce1456SRoger Quadros dev_err(dwc->dev, "failed to initialize host\n"); 157958d1a4cSFelipe Balbi } else { 158958d1a4cSFelipe Balbi if (dwc->usb2_phy) 159958d1a4cSFelipe Balbi otg_set_vbus(dwc->usb2_phy->otg, true); 160958d1a4cSFelipe Balbi phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST); 161644cbbc3SManu Gautam phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_HOST); 162958d1a4cSFelipe Balbi } 16341ce1456SRoger Quadros break; 16441ce1456SRoger Quadros case DWC3_GCTL_PRTCAP_DEVICE: 16541ce1456SRoger Quadros dwc3_event_buffers_setup(dwc); 166958d1a4cSFelipe Balbi 167958d1a4cSFelipe Balbi if (dwc->usb2_phy) 168958d1a4cSFelipe Balbi otg_set_vbus(dwc->usb2_phy->otg, false); 169958d1a4cSFelipe Balbi phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_DEVICE); 170644cbbc3SManu Gautam phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_DEVICE); 171958d1a4cSFelipe Balbi 17241ce1456SRoger Quadros ret = dwc3_gadget_init(dwc); 17341ce1456SRoger Quadros if (ret) 17441ce1456SRoger Quadros dev_err(dwc->dev, "failed to initialize peripheral\n"); 17541ce1456SRoger Quadros break; 17641ce1456SRoger Quadros default: 17741ce1456SRoger Quadros break; 17841ce1456SRoger Quadros } 17941ce1456SRoger Quadros } 18041ce1456SRoger Quadros 18141ce1456SRoger Quadros void dwc3_set_mode(struct dwc3 *dwc, u32 mode) 18241ce1456SRoger Quadros { 18341ce1456SRoger Quadros unsigned long flags; 18441ce1456SRoger Quadros 18541ce1456SRoger Quadros spin_lock_irqsave(&dwc->lock, flags); 18641ce1456SRoger Quadros dwc->desired_dr_role = mode; 18741ce1456SRoger Quadros spin_unlock_irqrestore(&dwc->lock, flags); 18841ce1456SRoger Quadros 18941ce1456SRoger Quadros queue_work(system_power_efficient_wq, &dwc->drd_work); 1903140e8cbSSebastian Andrzej Siewior } 1918300dd23SFelipe Balbi 192cf6d867dSFelipe Balbi u32 dwc3_core_fifo_space(struct dwc3_ep *dep, u8 type) 193cf6d867dSFelipe Balbi { 194cf6d867dSFelipe Balbi struct dwc3 *dwc = dep->dwc; 195cf6d867dSFelipe Balbi u32 reg; 196cf6d867dSFelipe Balbi 197cf6d867dSFelipe Balbi dwc3_writel(dwc->regs, DWC3_GDBGFIFOSPACE, 198cf6d867dSFelipe Balbi DWC3_GDBGFIFOSPACE_NUM(dep->number) | 199cf6d867dSFelipe Balbi DWC3_GDBGFIFOSPACE_TYPE(type)); 200cf6d867dSFelipe Balbi 201cf6d867dSFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GDBGFIFOSPACE); 202cf6d867dSFelipe Balbi 203cf6d867dSFelipe Balbi return DWC3_GDBGFIFOSPACE_SPACE_AVAILABLE(reg); 204cf6d867dSFelipe Balbi } 205cf6d867dSFelipe Balbi 20672246da4SFelipe Balbi /** 20772246da4SFelipe Balbi * dwc3_core_soft_reset - Issues core soft reset and PHY reset 20872246da4SFelipe Balbi * @dwc: pointer to our context structure 20972246da4SFelipe Balbi */ 21057303488SKishon Vijay Abraham I static int dwc3_core_soft_reset(struct dwc3 *dwc) 21172246da4SFelipe Balbi { 21272246da4SFelipe Balbi u32 reg; 213f59dcab1SFelipe Balbi int retries = 1000; 21457303488SKishon Vijay Abraham I int ret; 21572246da4SFelipe Balbi 21651e1e7bcSFelipe Balbi usb_phy_init(dwc->usb2_phy); 21751e1e7bcSFelipe Balbi usb_phy_init(dwc->usb3_phy); 21857303488SKishon Vijay Abraham I ret = phy_init(dwc->usb2_generic_phy); 21957303488SKishon Vijay Abraham I if (ret < 0) 22057303488SKishon Vijay Abraham I return ret; 22157303488SKishon Vijay Abraham I 22257303488SKishon Vijay Abraham I ret = phy_init(dwc->usb3_generic_phy); 22357303488SKishon Vijay Abraham I if (ret < 0) { 22457303488SKishon Vijay Abraham I phy_exit(dwc->usb2_generic_phy); 22557303488SKishon Vijay Abraham I return ret; 22657303488SKishon Vijay Abraham I } 22772246da4SFelipe Balbi 228f59dcab1SFelipe Balbi /* 229f59dcab1SFelipe Balbi * We're resetting only the device side because, if we're in host mode, 230f59dcab1SFelipe Balbi * XHCI driver will reset the host block. If dwc3 was configured for 231f59dcab1SFelipe Balbi * host-only mode, then we can return early. 232f59dcab1SFelipe Balbi */ 233f59dcab1SFelipe Balbi if (dwc->dr_mode == USB_DR_MODE_HOST) 23457303488SKishon Vijay Abraham I return 0; 235f59dcab1SFelipe Balbi 236f59dcab1SFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 237f59dcab1SFelipe Balbi reg |= DWC3_DCTL_CSFTRST; 238f59dcab1SFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, reg); 239f59dcab1SFelipe Balbi 240f59dcab1SFelipe Balbi do { 241f59dcab1SFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 242f59dcab1SFelipe Balbi if (!(reg & DWC3_DCTL_CSFTRST)) 243f59dcab1SFelipe Balbi return 0; 244f59dcab1SFelipe Balbi 245f59dcab1SFelipe Balbi udelay(1); 246f59dcab1SFelipe Balbi } while (--retries); 247f59dcab1SFelipe Balbi 248f59dcab1SFelipe Balbi return -ETIMEDOUT; 24972246da4SFelipe Balbi } 25072246da4SFelipe Balbi 251db2be4e9SNikhil Badola /* 252db2be4e9SNikhil Badola * dwc3_frame_length_adjustment - Adjusts frame length if required 253db2be4e9SNikhil Badola * @dwc3: Pointer to our controller context structure 254db2be4e9SNikhil Badola */ 255bcdb3272SFelipe Balbi static void dwc3_frame_length_adjustment(struct dwc3 *dwc) 256db2be4e9SNikhil Badola { 257db2be4e9SNikhil Badola u32 reg; 258db2be4e9SNikhil Badola u32 dft; 259db2be4e9SNikhil Badola 260db2be4e9SNikhil Badola if (dwc->revision < DWC3_REVISION_250A) 261db2be4e9SNikhil Badola return; 262db2be4e9SNikhil Badola 263bcdb3272SFelipe Balbi if (dwc->fladj == 0) 264db2be4e9SNikhil Badola return; 265db2be4e9SNikhil Badola 266db2be4e9SNikhil Badola reg = dwc3_readl(dwc->regs, DWC3_GFLADJ); 267db2be4e9SNikhil Badola dft = reg & DWC3_GFLADJ_30MHZ_MASK; 268bcdb3272SFelipe Balbi if (!dev_WARN_ONCE(dwc->dev, dft == dwc->fladj, 269db2be4e9SNikhil Badola "request value same as default, ignoring\n")) { 270db2be4e9SNikhil Badola reg &= ~DWC3_GFLADJ_30MHZ_MASK; 271bcdb3272SFelipe Balbi reg |= DWC3_GFLADJ_30MHZ_SDBND_SEL | dwc->fladj; 272db2be4e9SNikhil Badola dwc3_writel(dwc->regs, DWC3_GFLADJ, reg); 273db2be4e9SNikhil Badola } 274db2be4e9SNikhil Badola } 275db2be4e9SNikhil Badola 276c5cc74e8SHeikki Krogerus /** 27772246da4SFelipe Balbi * dwc3_free_one_event_buffer - Frees one event buffer 27872246da4SFelipe Balbi * @dwc: Pointer to our controller context structure 27972246da4SFelipe Balbi * @evt: Pointer to event buffer to be freed 28072246da4SFelipe Balbi */ 28172246da4SFelipe Balbi static void dwc3_free_one_event_buffer(struct dwc3 *dwc, 28272246da4SFelipe Balbi struct dwc3_event_buffer *evt) 28372246da4SFelipe Balbi { 284d64ff406SArnd Bergmann dma_free_coherent(dwc->sysdev, evt->length, evt->buf, evt->dma); 28572246da4SFelipe Balbi } 28672246da4SFelipe Balbi 28772246da4SFelipe Balbi /** 2881d046793SPaul Zimmerman * dwc3_alloc_one_event_buffer - Allocates one event buffer structure 28972246da4SFelipe Balbi * @dwc: Pointer to our controller context structure 29072246da4SFelipe Balbi * @length: size of the event buffer 29172246da4SFelipe Balbi * 2921d046793SPaul Zimmerman * Returns a pointer to the allocated event buffer structure on success 29372246da4SFelipe Balbi * otherwise ERR_PTR(errno). 29472246da4SFelipe Balbi */ 29567d0b500SFelipe Balbi static struct dwc3_event_buffer *dwc3_alloc_one_event_buffer(struct dwc3 *dwc, 29667d0b500SFelipe Balbi unsigned length) 29772246da4SFelipe Balbi { 29872246da4SFelipe Balbi struct dwc3_event_buffer *evt; 29972246da4SFelipe Balbi 300380f0d28SFelipe Balbi evt = devm_kzalloc(dwc->dev, sizeof(*evt), GFP_KERNEL); 30172246da4SFelipe Balbi if (!evt) 30272246da4SFelipe Balbi return ERR_PTR(-ENOMEM); 30372246da4SFelipe Balbi 30472246da4SFelipe Balbi evt->dwc = dwc; 30572246da4SFelipe Balbi evt->length = length; 306d9fa4c63SJohn Youn evt->cache = devm_kzalloc(dwc->dev, length, GFP_KERNEL); 307d9fa4c63SJohn Youn if (!evt->cache) 308d9fa4c63SJohn Youn return ERR_PTR(-ENOMEM); 309d9fa4c63SJohn Youn 310d64ff406SArnd Bergmann evt->buf = dma_alloc_coherent(dwc->sysdev, length, 31172246da4SFelipe Balbi &evt->dma, GFP_KERNEL); 312e32672f0SFelipe Balbi if (!evt->buf) 31372246da4SFelipe Balbi return ERR_PTR(-ENOMEM); 31472246da4SFelipe Balbi 31572246da4SFelipe Balbi return evt; 31672246da4SFelipe Balbi } 31772246da4SFelipe Balbi 31872246da4SFelipe Balbi /** 31972246da4SFelipe Balbi * dwc3_free_event_buffers - frees all allocated event buffers 32072246da4SFelipe Balbi * @dwc: Pointer to our controller context structure 32172246da4SFelipe Balbi */ 32272246da4SFelipe Balbi static void dwc3_free_event_buffers(struct dwc3 *dwc) 32372246da4SFelipe Balbi { 32472246da4SFelipe Balbi struct dwc3_event_buffer *evt; 32572246da4SFelipe Balbi 326696c8b12SFelipe Balbi evt = dwc->ev_buf; 32764b6c8a7SAnton Tikhomirov if (evt) 32872246da4SFelipe Balbi dwc3_free_one_event_buffer(dwc, evt); 32972246da4SFelipe Balbi } 33072246da4SFelipe Balbi 33172246da4SFelipe Balbi /** 33272246da4SFelipe Balbi * dwc3_alloc_event_buffers - Allocates @num event buffers of size @length 3331d046793SPaul Zimmerman * @dwc: pointer to our controller context structure 33472246da4SFelipe Balbi * @length: size of event buffer 33572246da4SFelipe Balbi * 3361d046793SPaul Zimmerman * Returns 0 on success otherwise negative errno. In the error case, dwc 33772246da4SFelipe Balbi * may contain some buffers allocated but not all which were requested. 33872246da4SFelipe Balbi */ 33941ac7b3aSBill Pemberton static int dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned length) 34072246da4SFelipe Balbi { 34172246da4SFelipe Balbi struct dwc3_event_buffer *evt; 34272246da4SFelipe Balbi 34372246da4SFelipe Balbi evt = dwc3_alloc_one_event_buffer(dwc, length); 34472246da4SFelipe Balbi if (IS_ERR(evt)) { 34572246da4SFelipe Balbi dev_err(dwc->dev, "can't allocate event buffer\n"); 34672246da4SFelipe Balbi return PTR_ERR(evt); 34772246da4SFelipe Balbi } 348696c8b12SFelipe Balbi dwc->ev_buf = evt; 34972246da4SFelipe Balbi 35072246da4SFelipe Balbi return 0; 35172246da4SFelipe Balbi } 35272246da4SFelipe Balbi 35372246da4SFelipe Balbi /** 35472246da4SFelipe Balbi * dwc3_event_buffers_setup - setup our allocated event buffers 3551d046793SPaul Zimmerman * @dwc: pointer to our controller context structure 35672246da4SFelipe Balbi * 35772246da4SFelipe Balbi * Returns 0 on success otherwise negative errno. 35872246da4SFelipe Balbi */ 3597acd85e0SPaul Zimmerman static int dwc3_event_buffers_setup(struct dwc3 *dwc) 36072246da4SFelipe Balbi { 36172246da4SFelipe Balbi struct dwc3_event_buffer *evt; 36272246da4SFelipe Balbi 363696c8b12SFelipe Balbi evt = dwc->ev_buf; 3647acd85e0SPaul Zimmerman evt->lpos = 0; 365660e9bdeSFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(0), 36672246da4SFelipe Balbi lower_32_bits(evt->dma)); 367660e9bdeSFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(0), 36872246da4SFelipe Balbi upper_32_bits(evt->dma)); 369660e9bdeSFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(0), 37068d6a01bSFelipe Balbi DWC3_GEVNTSIZ_SIZE(evt->length)); 371660e9bdeSFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(0), 0); 37272246da4SFelipe Balbi 37372246da4SFelipe Balbi return 0; 37472246da4SFelipe Balbi } 37572246da4SFelipe Balbi 37672246da4SFelipe Balbi static void dwc3_event_buffers_cleanup(struct dwc3 *dwc) 37772246da4SFelipe Balbi { 37872246da4SFelipe Balbi struct dwc3_event_buffer *evt; 37972246da4SFelipe Balbi 380696c8b12SFelipe Balbi evt = dwc->ev_buf; 3817acd85e0SPaul Zimmerman 3827acd85e0SPaul Zimmerman evt->lpos = 0; 3837acd85e0SPaul Zimmerman 384660e9bdeSFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(0), 0); 385660e9bdeSFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(0), 0); 386660e9bdeSFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(0), DWC3_GEVNTSIZ_INTMASK 38768d6a01bSFelipe Balbi | DWC3_GEVNTSIZ_SIZE(0)); 388660e9bdeSFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(0), 0); 38972246da4SFelipe Balbi } 39072246da4SFelipe Balbi 3910ffcaf37SFelipe Balbi static int dwc3_alloc_scratch_buffers(struct dwc3 *dwc) 3920ffcaf37SFelipe Balbi { 3930ffcaf37SFelipe Balbi if (!dwc->has_hibernation) 3940ffcaf37SFelipe Balbi return 0; 3950ffcaf37SFelipe Balbi 3960ffcaf37SFelipe Balbi if (!dwc->nr_scratch) 3970ffcaf37SFelipe Balbi return 0; 3980ffcaf37SFelipe Balbi 3990ffcaf37SFelipe Balbi dwc->scratchbuf = kmalloc_array(dwc->nr_scratch, 4000ffcaf37SFelipe Balbi DWC3_SCRATCHBUF_SIZE, GFP_KERNEL); 4010ffcaf37SFelipe Balbi if (!dwc->scratchbuf) 4020ffcaf37SFelipe Balbi return -ENOMEM; 4030ffcaf37SFelipe Balbi 4040ffcaf37SFelipe Balbi return 0; 4050ffcaf37SFelipe Balbi } 4060ffcaf37SFelipe Balbi 4070ffcaf37SFelipe Balbi static int dwc3_setup_scratch_buffers(struct dwc3 *dwc) 4080ffcaf37SFelipe Balbi { 4090ffcaf37SFelipe Balbi dma_addr_t scratch_addr; 4100ffcaf37SFelipe Balbi u32 param; 4110ffcaf37SFelipe Balbi int ret; 4120ffcaf37SFelipe Balbi 4130ffcaf37SFelipe Balbi if (!dwc->has_hibernation) 4140ffcaf37SFelipe Balbi return 0; 4150ffcaf37SFelipe Balbi 4160ffcaf37SFelipe Balbi if (!dwc->nr_scratch) 4170ffcaf37SFelipe Balbi return 0; 4180ffcaf37SFelipe Balbi 4190ffcaf37SFelipe Balbi /* should never fall here */ 4200ffcaf37SFelipe Balbi if (!WARN_ON(dwc->scratchbuf)) 4210ffcaf37SFelipe Balbi return 0; 4220ffcaf37SFelipe Balbi 423d64ff406SArnd Bergmann scratch_addr = dma_map_single(dwc->sysdev, dwc->scratchbuf, 4240ffcaf37SFelipe Balbi dwc->nr_scratch * DWC3_SCRATCHBUF_SIZE, 4250ffcaf37SFelipe Balbi DMA_BIDIRECTIONAL); 426d64ff406SArnd Bergmann if (dma_mapping_error(dwc->sysdev, scratch_addr)) { 427d64ff406SArnd Bergmann dev_err(dwc->sysdev, "failed to map scratch buffer\n"); 4280ffcaf37SFelipe Balbi ret = -EFAULT; 4290ffcaf37SFelipe Balbi goto err0; 4300ffcaf37SFelipe Balbi } 4310ffcaf37SFelipe Balbi 4320ffcaf37SFelipe Balbi dwc->scratch_addr = scratch_addr; 4330ffcaf37SFelipe Balbi 4340ffcaf37SFelipe Balbi param = lower_32_bits(scratch_addr); 4350ffcaf37SFelipe Balbi 4360ffcaf37SFelipe Balbi ret = dwc3_send_gadget_generic_command(dwc, 4370ffcaf37SFelipe Balbi DWC3_DGCMD_SET_SCRATCHPAD_ADDR_LO, param); 4380ffcaf37SFelipe Balbi if (ret < 0) 4390ffcaf37SFelipe Balbi goto err1; 4400ffcaf37SFelipe Balbi 4410ffcaf37SFelipe Balbi param = upper_32_bits(scratch_addr); 4420ffcaf37SFelipe Balbi 4430ffcaf37SFelipe Balbi ret = dwc3_send_gadget_generic_command(dwc, 4440ffcaf37SFelipe Balbi DWC3_DGCMD_SET_SCRATCHPAD_ADDR_HI, param); 4450ffcaf37SFelipe Balbi if (ret < 0) 4460ffcaf37SFelipe Balbi goto err1; 4470ffcaf37SFelipe Balbi 4480ffcaf37SFelipe Balbi return 0; 4490ffcaf37SFelipe Balbi 4500ffcaf37SFelipe Balbi err1: 451d64ff406SArnd Bergmann dma_unmap_single(dwc->sysdev, dwc->scratch_addr, dwc->nr_scratch * 4520ffcaf37SFelipe Balbi DWC3_SCRATCHBUF_SIZE, DMA_BIDIRECTIONAL); 4530ffcaf37SFelipe Balbi 4540ffcaf37SFelipe Balbi err0: 4550ffcaf37SFelipe Balbi return ret; 4560ffcaf37SFelipe Balbi } 4570ffcaf37SFelipe Balbi 4580ffcaf37SFelipe Balbi static void dwc3_free_scratch_buffers(struct dwc3 *dwc) 4590ffcaf37SFelipe Balbi { 4600ffcaf37SFelipe Balbi if (!dwc->has_hibernation) 4610ffcaf37SFelipe Balbi return; 4620ffcaf37SFelipe Balbi 4630ffcaf37SFelipe Balbi if (!dwc->nr_scratch) 4640ffcaf37SFelipe Balbi return; 4650ffcaf37SFelipe Balbi 4660ffcaf37SFelipe Balbi /* should never fall here */ 4670ffcaf37SFelipe Balbi if (!WARN_ON(dwc->scratchbuf)) 4680ffcaf37SFelipe Balbi return; 4690ffcaf37SFelipe Balbi 470d64ff406SArnd Bergmann dma_unmap_single(dwc->sysdev, dwc->scratch_addr, dwc->nr_scratch * 4710ffcaf37SFelipe Balbi DWC3_SCRATCHBUF_SIZE, DMA_BIDIRECTIONAL); 4720ffcaf37SFelipe Balbi kfree(dwc->scratchbuf); 4730ffcaf37SFelipe Balbi } 4740ffcaf37SFelipe Balbi 475789451f6SFelipe Balbi static void dwc3_core_num_eps(struct dwc3 *dwc) 476789451f6SFelipe Balbi { 477789451f6SFelipe Balbi struct dwc3_hwparams *parms = &dwc->hwparams; 478789451f6SFelipe Balbi 47947d3946eSBryan O'Donoghue dwc->num_eps = DWC3_NUM_EPS(parms); 480789451f6SFelipe Balbi } 481789451f6SFelipe Balbi 48241ac7b3aSBill Pemberton static void dwc3_cache_hwparams(struct dwc3 *dwc) 48326ceca97SFelipe Balbi { 48426ceca97SFelipe Balbi struct dwc3_hwparams *parms = &dwc->hwparams; 48526ceca97SFelipe Balbi 48626ceca97SFelipe Balbi parms->hwparams0 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS0); 48726ceca97SFelipe Balbi parms->hwparams1 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS1); 48826ceca97SFelipe Balbi parms->hwparams2 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS2); 48926ceca97SFelipe Balbi parms->hwparams3 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS3); 49026ceca97SFelipe Balbi parms->hwparams4 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS4); 49126ceca97SFelipe Balbi parms->hwparams5 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS5); 49226ceca97SFelipe Balbi parms->hwparams6 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS6); 49326ceca97SFelipe Balbi parms->hwparams7 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS7); 49426ceca97SFelipe Balbi parms->hwparams8 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS8); 49526ceca97SFelipe Balbi } 49626ceca97SFelipe Balbi 49772246da4SFelipe Balbi /** 498b5a65c40SHuang Rui * dwc3_phy_setup - Configure USB PHY Interface of DWC3 Core 499b5a65c40SHuang Rui * @dwc: Pointer to our controller context structure 50088bc9d19SHeikki Krogerus * 50188bc9d19SHeikki Krogerus * Returns 0 on success. The USB PHY interfaces are configured but not 50288bc9d19SHeikki Krogerus * initialized. The PHY interfaces and the PHYs get initialized together with 50388bc9d19SHeikki Krogerus * the core in dwc3_core_init. 504b5a65c40SHuang Rui */ 50588bc9d19SHeikki Krogerus static int dwc3_phy_setup(struct dwc3 *dwc) 506b5a65c40SHuang Rui { 507b5a65c40SHuang Rui u32 reg; 50888bc9d19SHeikki Krogerus int ret; 509b5a65c40SHuang Rui 510b5a65c40SHuang Rui reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); 511b5a65c40SHuang Rui 5122164a476SHuang Rui /* 5131966b865SFelipe Balbi * Make sure UX_EXIT_PX is cleared as that causes issues with some 5141966b865SFelipe Balbi * PHYs. Also, this bit is not supposed to be used in normal operation. 5151966b865SFelipe Balbi */ 5161966b865SFelipe Balbi reg &= ~DWC3_GUSB3PIPECTL_UX_EXIT_PX; 5171966b865SFelipe Balbi 5181966b865SFelipe Balbi /* 5192164a476SHuang Rui * Above 1.94a, it is recommended to set DWC3_GUSB3PIPECTL_SUSPHY 5202164a476SHuang Rui * to '0' during coreConsultant configuration. So default value 5212164a476SHuang Rui * will be '0' when the core is reset. Application needs to set it 5222164a476SHuang Rui * to '1' after the core initialization is completed. 5232164a476SHuang Rui */ 5242164a476SHuang Rui if (dwc->revision > DWC3_REVISION_194A) 5252164a476SHuang Rui reg |= DWC3_GUSB3PIPECTL_SUSPHY; 5262164a476SHuang Rui 527b5a65c40SHuang Rui if (dwc->u2ss_inp3_quirk) 528b5a65c40SHuang Rui reg |= DWC3_GUSB3PIPECTL_U2SSINP3OK; 529b5a65c40SHuang Rui 530e58dd357SRajesh Bhagat if (dwc->dis_rxdet_inp3_quirk) 531e58dd357SRajesh Bhagat reg |= DWC3_GUSB3PIPECTL_DISRXDETINP3; 532e58dd357SRajesh Bhagat 533df31f5b3SHuang Rui if (dwc->req_p1p2p3_quirk) 534df31f5b3SHuang Rui reg |= DWC3_GUSB3PIPECTL_REQP1P2P3; 535df31f5b3SHuang Rui 536a2a1d0f5SHuang Rui if (dwc->del_p1p2p3_quirk) 537a2a1d0f5SHuang Rui reg |= DWC3_GUSB3PIPECTL_DEP1P2P3_EN; 538a2a1d0f5SHuang Rui 53941c06ffdSHuang Rui if (dwc->del_phy_power_chg_quirk) 54041c06ffdSHuang Rui reg |= DWC3_GUSB3PIPECTL_DEPOCHANGE; 54141c06ffdSHuang Rui 542fb67afcaSHuang Rui if (dwc->lfps_filter_quirk) 543fb67afcaSHuang Rui reg |= DWC3_GUSB3PIPECTL_LFPSFILT; 544fb67afcaSHuang Rui 54514f4ac53SHuang Rui if (dwc->rx_detect_poll_quirk) 54614f4ac53SHuang Rui reg |= DWC3_GUSB3PIPECTL_RX_DETOPOLL; 54714f4ac53SHuang Rui 5486b6a0c9aSHuang Rui if (dwc->tx_de_emphasis_quirk) 5496b6a0c9aSHuang Rui reg |= DWC3_GUSB3PIPECTL_TX_DEEPH(dwc->tx_de_emphasis); 5506b6a0c9aSHuang Rui 551cd72f890SFelipe Balbi if (dwc->dis_u3_susphy_quirk) 55259acfa20SHuang Rui reg &= ~DWC3_GUSB3PIPECTL_SUSPHY; 55359acfa20SHuang Rui 55400fe081dSWilliam Wu if (dwc->dis_del_phy_power_chg_quirk) 55500fe081dSWilliam Wu reg &= ~DWC3_GUSB3PIPECTL_DEPOCHANGE; 55600fe081dSWilliam Wu 557b5a65c40SHuang Rui dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); 558b5a65c40SHuang Rui 5592164a476SHuang Rui reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); 5602164a476SHuang Rui 5613e10a2ceSHeikki Krogerus /* Select the HS PHY interface */ 5623e10a2ceSHeikki Krogerus switch (DWC3_GHWPARAMS3_HSPHY_IFC(dwc->hwparams.hwparams3)) { 5633e10a2ceSHeikki Krogerus case DWC3_GHWPARAMS3_HSPHY_IFC_UTMI_ULPI: 56443cacb03SFelipe Balbi if (dwc->hsphy_interface && 56543cacb03SFelipe Balbi !strncmp(dwc->hsphy_interface, "utmi", 4)) { 5663e10a2ceSHeikki Krogerus reg &= ~DWC3_GUSB2PHYCFG_ULPI_UTMI; 56788bc9d19SHeikki Krogerus break; 56843cacb03SFelipe Balbi } else if (dwc->hsphy_interface && 56943cacb03SFelipe Balbi !strncmp(dwc->hsphy_interface, "ulpi", 4)) { 5703e10a2ceSHeikki Krogerus reg |= DWC3_GUSB2PHYCFG_ULPI_UTMI; 57188bc9d19SHeikki Krogerus dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); 5723e10a2ceSHeikki Krogerus } else { 57388bc9d19SHeikki Krogerus /* Relying on default value. */ 57488bc9d19SHeikki Krogerus if (!(reg & DWC3_GUSB2PHYCFG_ULPI_UTMI)) 5753e10a2ceSHeikki Krogerus break; 5763e10a2ceSHeikki Krogerus } 5773e10a2ceSHeikki Krogerus /* FALLTHROUGH */ 57888bc9d19SHeikki Krogerus case DWC3_GHWPARAMS3_HSPHY_IFC_ULPI: 57988bc9d19SHeikki Krogerus ret = dwc3_ulpi_init(dwc); 58088bc9d19SHeikki Krogerus if (ret) 58188bc9d19SHeikki Krogerus return ret; 58288bc9d19SHeikki Krogerus /* FALLTHROUGH */ 5833e10a2ceSHeikki Krogerus default: 5843e10a2ceSHeikki Krogerus break; 5853e10a2ceSHeikki Krogerus } 5863e10a2ceSHeikki Krogerus 58732f2ed86SWilliam Wu switch (dwc->hsphy_mode) { 58832f2ed86SWilliam Wu case USBPHY_INTERFACE_MODE_UTMI: 58932f2ed86SWilliam Wu reg &= ~(DWC3_GUSB2PHYCFG_PHYIF_MASK | 59032f2ed86SWilliam Wu DWC3_GUSB2PHYCFG_USBTRDTIM_MASK); 59132f2ed86SWilliam Wu reg |= DWC3_GUSB2PHYCFG_PHYIF(UTMI_PHYIF_8_BIT) | 59232f2ed86SWilliam Wu DWC3_GUSB2PHYCFG_USBTRDTIM(USBTRDTIM_UTMI_8_BIT); 59332f2ed86SWilliam Wu break; 59432f2ed86SWilliam Wu case USBPHY_INTERFACE_MODE_UTMIW: 59532f2ed86SWilliam Wu reg &= ~(DWC3_GUSB2PHYCFG_PHYIF_MASK | 59632f2ed86SWilliam Wu DWC3_GUSB2PHYCFG_USBTRDTIM_MASK); 59732f2ed86SWilliam Wu reg |= DWC3_GUSB2PHYCFG_PHYIF(UTMI_PHYIF_16_BIT) | 59832f2ed86SWilliam Wu DWC3_GUSB2PHYCFG_USBTRDTIM(USBTRDTIM_UTMI_16_BIT); 59932f2ed86SWilliam Wu break; 60032f2ed86SWilliam Wu default: 60132f2ed86SWilliam Wu break; 60232f2ed86SWilliam Wu } 60332f2ed86SWilliam Wu 6042164a476SHuang Rui /* 6052164a476SHuang Rui * Above 1.94a, it is recommended to set DWC3_GUSB2PHYCFG_SUSPHY to 6062164a476SHuang Rui * '0' during coreConsultant configuration. So default value will 6072164a476SHuang Rui * be '0' when the core is reset. Application needs to set it to 6082164a476SHuang Rui * '1' after the core initialization is completed. 6092164a476SHuang Rui */ 6102164a476SHuang Rui if (dwc->revision > DWC3_REVISION_194A) 6112164a476SHuang Rui reg |= DWC3_GUSB2PHYCFG_SUSPHY; 6122164a476SHuang Rui 613cd72f890SFelipe Balbi if (dwc->dis_u2_susphy_quirk) 6140effe0a3SHuang Rui reg &= ~DWC3_GUSB2PHYCFG_SUSPHY; 6150effe0a3SHuang Rui 616ec791d14SJohn Youn if (dwc->dis_enblslpm_quirk) 617ec791d14SJohn Youn reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM; 618ec791d14SJohn Youn 61916199f33SWilliam Wu if (dwc->dis_u2_freeclk_exists_quirk) 62016199f33SWilliam Wu reg &= ~DWC3_GUSB2PHYCFG_U2_FREECLK_EXISTS; 62116199f33SWilliam Wu 6222164a476SHuang Rui dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); 62388bc9d19SHeikki Krogerus 62488bc9d19SHeikki Krogerus return 0; 625b5a65c40SHuang Rui } 626b5a65c40SHuang Rui 627c499ff71SFelipe Balbi static void dwc3_core_exit(struct dwc3 *dwc) 628c499ff71SFelipe Balbi { 629c499ff71SFelipe Balbi dwc3_event_buffers_cleanup(dwc); 630c499ff71SFelipe Balbi 631c499ff71SFelipe Balbi usb_phy_shutdown(dwc->usb2_phy); 632c499ff71SFelipe Balbi usb_phy_shutdown(dwc->usb3_phy); 633c499ff71SFelipe Balbi phy_exit(dwc->usb2_generic_phy); 634c499ff71SFelipe Balbi phy_exit(dwc->usb3_generic_phy); 635c499ff71SFelipe Balbi 636c499ff71SFelipe Balbi usb_phy_set_suspend(dwc->usb2_phy, 1); 637c499ff71SFelipe Balbi usb_phy_set_suspend(dwc->usb3_phy, 1); 638c499ff71SFelipe Balbi phy_power_off(dwc->usb2_generic_phy); 639c499ff71SFelipe Balbi phy_power_off(dwc->usb3_generic_phy); 640c499ff71SFelipe Balbi } 641c499ff71SFelipe Balbi 6420759956fSFelipe Balbi static bool dwc3_core_is_valid(struct dwc3 *dwc) 64372246da4SFelipe Balbi { 64472246da4SFelipe Balbi u32 reg; 64572246da4SFelipe Balbi 6467650bd74SSebastian Andrzej Siewior reg = dwc3_readl(dwc->regs, DWC3_GSNPSID); 6470759956fSFelipe Balbi 6487650bd74SSebastian Andrzej Siewior /* This should read as U3 followed by revision number */ 649690fb371SJohn Youn if ((reg & DWC3_GSNPSID_MASK) == 0x55330000) { 650690fb371SJohn Youn /* Detected DWC_usb3 IP */ 651690fb371SJohn Youn dwc->revision = reg; 652690fb371SJohn Youn } else if ((reg & DWC3_GSNPSID_MASK) == 0x33310000) { 653690fb371SJohn Youn /* Detected DWC_usb31 IP */ 654690fb371SJohn Youn dwc->revision = dwc3_readl(dwc->regs, DWC3_VER_NUMBER); 655690fb371SJohn Youn dwc->revision |= DWC3_REVISION_IS_DWC31; 656690fb371SJohn Youn } else { 6570759956fSFelipe Balbi return false; 6587650bd74SSebastian Andrzej Siewior } 6597650bd74SSebastian Andrzej Siewior 6600759956fSFelipe Balbi return true; 6610e1e5c47SPaul Zimmerman } 6620e1e5c47SPaul Zimmerman 663941f918eSFelipe Balbi static void dwc3_core_setup_global_control(struct dwc3 *dwc) 66472246da4SFelipe Balbi { 66572246da4SFelipe Balbi u32 hwparams4 = dwc->hwparams.hwparams4; 66672246da4SFelipe Balbi u32 reg; 667c499ff71SFelipe Balbi 6684878a028SSebastian Andrzej Siewior reg = dwc3_readl(dwc->regs, DWC3_GCTL); 6693e87c42aSPaul Zimmerman reg &= ~DWC3_GCTL_SCALEDOWN_MASK; 6704878a028SSebastian Andrzej Siewior 671164d7731SSebastian Andrzej Siewior switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams1)) { 6724878a028SSebastian Andrzej Siewior case DWC3_GHWPARAMS1_EN_PWROPT_CLK: 67332a4a135SFelipe Balbi /** 67432a4a135SFelipe Balbi * WORKAROUND: DWC3 revisions between 2.10a and 2.50a have an 67532a4a135SFelipe Balbi * issue which would cause xHCI compliance tests to fail. 67632a4a135SFelipe Balbi * 67732a4a135SFelipe Balbi * Because of that we cannot enable clock gating on such 67832a4a135SFelipe Balbi * configurations. 67932a4a135SFelipe Balbi * 68032a4a135SFelipe Balbi * Refers to: 68132a4a135SFelipe Balbi * 68232a4a135SFelipe Balbi * STAR#9000588375: Clock Gating, SOF Issues when ref_clk-Based 68332a4a135SFelipe Balbi * SOF/ITP Mode Used 68432a4a135SFelipe Balbi */ 68532a4a135SFelipe Balbi if ((dwc->dr_mode == USB_DR_MODE_HOST || 68632a4a135SFelipe Balbi dwc->dr_mode == USB_DR_MODE_OTG) && 68732a4a135SFelipe Balbi (dwc->revision >= DWC3_REVISION_210A && 68832a4a135SFelipe Balbi dwc->revision <= DWC3_REVISION_250A)) 68932a4a135SFelipe Balbi reg |= DWC3_GCTL_DSBLCLKGTNG | DWC3_GCTL_SOFITPSYNC; 69032a4a135SFelipe Balbi else 6914878a028SSebastian Andrzej Siewior reg &= ~DWC3_GCTL_DSBLCLKGTNG; 6924878a028SSebastian Andrzej Siewior break; 6930ffcaf37SFelipe Balbi case DWC3_GHWPARAMS1_EN_PWROPT_HIB: 6940ffcaf37SFelipe Balbi /* enable hibernation here */ 6950ffcaf37SFelipe Balbi dwc->nr_scratch = DWC3_GHWPARAMS4_HIBER_SCRATCHBUFS(hwparams4); 6962eac3992SHuang Rui 6972eac3992SHuang Rui /* 6982eac3992SHuang Rui * REVISIT Enabling this bit so that host-mode hibernation 6992eac3992SHuang Rui * will work. Device-mode hibernation is not yet implemented. 7002eac3992SHuang Rui */ 7012eac3992SHuang Rui reg |= DWC3_GCTL_GBLHIBERNATIONEN; 7020ffcaf37SFelipe Balbi break; 7034878a028SSebastian Andrzej Siewior default: 7045eb30cedSFelipe Balbi /* nothing */ 7055eb30cedSFelipe Balbi break; 7064878a028SSebastian Andrzej Siewior } 7074878a028SSebastian Andrzej Siewior 708946bd579SHuang Rui /* check if current dwc3 is on simulation board */ 709946bd579SHuang Rui if (dwc->hwparams.hwparams6 & DWC3_GHWPARAMS6_EN_FPGA) { 7105eb30cedSFelipe Balbi dev_info(dwc->dev, "Running with FPGA optmizations\n"); 711946bd579SHuang Rui dwc->is_fpga = true; 712946bd579SHuang Rui } 713946bd579SHuang Rui 7143b81221aSHuang Rui WARN_ONCE(dwc->disable_scramble_quirk && !dwc->is_fpga, 7153b81221aSHuang Rui "disable_scramble cannot be used on non-FPGA builds\n"); 7163b81221aSHuang Rui 7173b81221aSHuang Rui if (dwc->disable_scramble_quirk && dwc->is_fpga) 7183b81221aSHuang Rui reg |= DWC3_GCTL_DISSCRAMBLE; 7193b81221aSHuang Rui else 7203b81221aSHuang Rui reg &= ~DWC3_GCTL_DISSCRAMBLE; 7213b81221aSHuang Rui 7229a5b2f31SHuang Rui if (dwc->u2exit_lfps_quirk) 7239a5b2f31SHuang Rui reg |= DWC3_GCTL_U2EXIT_LFPS; 7249a5b2f31SHuang Rui 7254878a028SSebastian Andrzej Siewior /* 7264878a028SSebastian Andrzej Siewior * WORKAROUND: DWC3 revisions <1.90a have a bug 7271d046793SPaul Zimmerman * where the device can fail to connect at SuperSpeed 7284878a028SSebastian Andrzej Siewior * and falls back to high-speed mode which causes 7291d046793SPaul Zimmerman * the device to enter a Connect/Disconnect loop 7304878a028SSebastian Andrzej Siewior */ 7314878a028SSebastian Andrzej Siewior if (dwc->revision < DWC3_REVISION_190A) 7324878a028SSebastian Andrzej Siewior reg |= DWC3_GCTL_U2RSTECN; 7334878a028SSebastian Andrzej Siewior 7344878a028SSebastian Andrzej Siewior dwc3_writel(dwc->regs, DWC3_GCTL, reg); 735941f918eSFelipe Balbi } 7364878a028SSebastian Andrzej Siewior 737f54edb53SFelipe Balbi static int dwc3_core_get_phy(struct dwc3 *dwc); 738f54edb53SFelipe Balbi 739941f918eSFelipe Balbi /** 740941f918eSFelipe Balbi * dwc3_core_init - Low-level initialization of DWC3 Core 741941f918eSFelipe Balbi * @dwc: Pointer to our controller context structure 742941f918eSFelipe Balbi * 743941f918eSFelipe Balbi * Returns 0 on success otherwise negative errno. 744941f918eSFelipe Balbi */ 745941f918eSFelipe Balbi static int dwc3_core_init(struct dwc3 *dwc) 746941f918eSFelipe Balbi { 747941f918eSFelipe Balbi u32 reg; 748941f918eSFelipe Balbi int ret; 749941f918eSFelipe Balbi 750941f918eSFelipe Balbi if (!dwc3_core_is_valid(dwc)) { 751941f918eSFelipe Balbi dev_err(dwc->dev, "this is not a DesignWare USB3 DRD Core\n"); 752941f918eSFelipe Balbi ret = -ENODEV; 753941f918eSFelipe Balbi goto err0; 754941f918eSFelipe Balbi } 755941f918eSFelipe Balbi 756941f918eSFelipe Balbi /* 757941f918eSFelipe Balbi * Write Linux Version Code to our GUID register so it's easy to figure 758941f918eSFelipe Balbi * out which kernel version a bug was found. 759941f918eSFelipe Balbi */ 760941f918eSFelipe Balbi dwc3_writel(dwc->regs, DWC3_GUID, LINUX_VERSION_CODE); 761941f918eSFelipe Balbi 762941f918eSFelipe Balbi /* Handle USB2.0-only core configuration */ 763941f918eSFelipe Balbi if (DWC3_GHWPARAMS3_SSPHY_IFC(dwc->hwparams.hwparams3) == 764941f918eSFelipe Balbi DWC3_GHWPARAMS3_SSPHY_IFC_DIS) { 765941f918eSFelipe Balbi if (dwc->maximum_speed == USB_SPEED_SUPER) 766941f918eSFelipe Balbi dwc->maximum_speed = USB_SPEED_HIGH; 767941f918eSFelipe Balbi } 768941f918eSFelipe Balbi 769541768b0SVignesh R ret = dwc3_core_get_phy(dwc); 770541768b0SVignesh R if (ret) 771541768b0SVignesh R goto err0; 772541768b0SVignesh R 773941f918eSFelipe Balbi ret = dwc3_core_soft_reset(dwc); 774941f918eSFelipe Balbi if (ret) 775941f918eSFelipe Balbi goto err0; 776941f918eSFelipe Balbi 777941f918eSFelipe Balbi ret = dwc3_phy_setup(dwc); 778941f918eSFelipe Balbi if (ret) 779941f918eSFelipe Balbi goto err0; 780941f918eSFelipe Balbi 781941f918eSFelipe Balbi dwc3_core_setup_global_control(dwc); 782c499ff71SFelipe Balbi dwc3_core_num_eps(dwc); 7830ffcaf37SFelipe Balbi 7840ffcaf37SFelipe Balbi ret = dwc3_setup_scratch_buffers(dwc); 7850ffcaf37SFelipe Balbi if (ret) 786c499ff71SFelipe Balbi goto err1; 787c499ff71SFelipe Balbi 788c499ff71SFelipe Balbi /* Adjust Frame Length */ 789c499ff71SFelipe Balbi dwc3_frame_length_adjustment(dwc); 790c499ff71SFelipe Balbi 791c499ff71SFelipe Balbi usb_phy_set_suspend(dwc->usb2_phy, 0); 792c499ff71SFelipe Balbi usb_phy_set_suspend(dwc->usb3_phy, 0); 793c499ff71SFelipe Balbi ret = phy_power_on(dwc->usb2_generic_phy); 794c499ff71SFelipe Balbi if (ret < 0) 7950ffcaf37SFelipe Balbi goto err2; 7960ffcaf37SFelipe Balbi 797c499ff71SFelipe Balbi ret = phy_power_on(dwc->usb3_generic_phy); 798c499ff71SFelipe Balbi if (ret < 0) 799c499ff71SFelipe Balbi goto err3; 800c499ff71SFelipe Balbi 801c499ff71SFelipe Balbi ret = dwc3_event_buffers_setup(dwc); 802c499ff71SFelipe Balbi if (ret) { 803c499ff71SFelipe Balbi dev_err(dwc->dev, "failed to setup event buffers\n"); 804c499ff71SFelipe Balbi goto err4; 805c499ff71SFelipe Balbi } 806c499ff71SFelipe Balbi 80706281d46SJohn Youn /* 80806281d46SJohn Youn * ENDXFER polling is available on version 3.10a and later of 80906281d46SJohn Youn * the DWC_usb3 controller. It is NOT available in the 81006281d46SJohn Youn * DWC_usb31 controller. 81106281d46SJohn Youn */ 81206281d46SJohn Youn if (!dwc3_is_usb31(dwc) && dwc->revision >= DWC3_REVISION_310A) { 81306281d46SJohn Youn reg = dwc3_readl(dwc->regs, DWC3_GUCTL2); 81406281d46SJohn Youn reg |= DWC3_GUCTL2_RST_ACTBITLATER; 81506281d46SJohn Youn dwc3_writel(dwc->regs, DWC3_GUCTL2, reg); 81606281d46SJohn Youn } 81706281d46SJohn Youn 81865db7a0cSWilliam Wu if (dwc->revision >= DWC3_REVISION_250A) { 8190bb39ca1SJohn Youn reg = dwc3_readl(dwc->regs, DWC3_GUCTL1); 82065db7a0cSWilliam Wu 82165db7a0cSWilliam Wu /* 82265db7a0cSWilliam Wu * Enable hardware control of sending remote wakeup 82365db7a0cSWilliam Wu * in HS when the device is in the L1 state. 82465db7a0cSWilliam Wu */ 82565db7a0cSWilliam Wu if (dwc->revision >= DWC3_REVISION_290A) 8260bb39ca1SJohn Youn reg |= DWC3_GUCTL1_DEV_L1_EXIT_BY_HW; 82765db7a0cSWilliam Wu 82865db7a0cSWilliam Wu if (dwc->dis_tx_ipgap_linecheck_quirk) 82965db7a0cSWilliam Wu reg |= DWC3_GUCTL1_TX_IPGAP_LINECHECK_DIS; 83065db7a0cSWilliam Wu 8310bb39ca1SJohn Youn dwc3_writel(dwc->regs, DWC3_GUCTL1, reg); 8320bb39ca1SJohn Youn } 8330bb39ca1SJohn Youn 83472246da4SFelipe Balbi return 0; 83572246da4SFelipe Balbi 836c499ff71SFelipe Balbi err4: 8379b9d7cddSVivek Gautam phy_power_off(dwc->usb3_generic_phy); 838c499ff71SFelipe Balbi 839c499ff71SFelipe Balbi err3: 8409b9d7cddSVivek Gautam phy_power_off(dwc->usb2_generic_phy); 841c499ff71SFelipe Balbi 8420ffcaf37SFelipe Balbi err2: 843c499ff71SFelipe Balbi usb_phy_set_suspend(dwc->usb2_phy, 1); 844c499ff71SFelipe Balbi usb_phy_set_suspend(dwc->usb3_phy, 1); 8450ffcaf37SFelipe Balbi 8460ffcaf37SFelipe Balbi err1: 8470ffcaf37SFelipe Balbi usb_phy_shutdown(dwc->usb2_phy); 8480ffcaf37SFelipe Balbi usb_phy_shutdown(dwc->usb3_phy); 84957303488SKishon Vijay Abraham I phy_exit(dwc->usb2_generic_phy); 85057303488SKishon Vijay Abraham I phy_exit(dwc->usb3_generic_phy); 8510ffcaf37SFelipe Balbi 85272246da4SFelipe Balbi err0: 85372246da4SFelipe Balbi return ret; 85472246da4SFelipe Balbi } 85572246da4SFelipe Balbi 8563c9f94acSFelipe Balbi static int dwc3_core_get_phy(struct dwc3 *dwc) 85772246da4SFelipe Balbi { 8583c9f94acSFelipe Balbi struct device *dev = dwc->dev; 859941ea361SFelipe Balbi struct device_node *node = dev->of_node; 8603c9f94acSFelipe Balbi int ret; 86172246da4SFelipe Balbi 8625088b6f5SKishon Vijay Abraham I if (node) { 8635088b6f5SKishon Vijay Abraham I dwc->usb2_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 0); 8645088b6f5SKishon Vijay Abraham I dwc->usb3_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 1); 865bb674907SFelipe Balbi } else { 866bb674907SFelipe Balbi dwc->usb2_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2); 867bb674907SFelipe Balbi dwc->usb3_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB3); 8685088b6f5SKishon Vijay Abraham I } 8695088b6f5SKishon Vijay Abraham I 870d105e7f8SFelipe Balbi if (IS_ERR(dwc->usb2_phy)) { 871d105e7f8SFelipe Balbi ret = PTR_ERR(dwc->usb2_phy); 872122f06e6SKishon Vijay Abraham I if (ret == -ENXIO || ret == -ENODEV) { 873122f06e6SKishon Vijay Abraham I dwc->usb2_phy = NULL; 874122f06e6SKishon Vijay Abraham I } else if (ret == -EPROBE_DEFER) { 875d105e7f8SFelipe Balbi return ret; 876122f06e6SKishon Vijay Abraham I } else { 87751e1e7bcSFelipe Balbi dev_err(dev, "no usb2 phy configured\n"); 878122f06e6SKishon Vijay Abraham I return ret; 879122f06e6SKishon Vijay Abraham I } 88051e1e7bcSFelipe Balbi } 88151e1e7bcSFelipe Balbi 882d105e7f8SFelipe Balbi if (IS_ERR(dwc->usb3_phy)) { 883315955d7SRuchika Kharwar ret = PTR_ERR(dwc->usb3_phy); 884122f06e6SKishon Vijay Abraham I if (ret == -ENXIO || ret == -ENODEV) { 885122f06e6SKishon Vijay Abraham I dwc->usb3_phy = NULL; 886122f06e6SKishon Vijay Abraham I } else if (ret == -EPROBE_DEFER) { 887d105e7f8SFelipe Balbi return ret; 888122f06e6SKishon Vijay Abraham I } else { 88951e1e7bcSFelipe Balbi dev_err(dev, "no usb3 phy configured\n"); 890122f06e6SKishon Vijay Abraham I return ret; 891122f06e6SKishon Vijay Abraham I } 89251e1e7bcSFelipe Balbi } 89351e1e7bcSFelipe Balbi 89457303488SKishon Vijay Abraham I dwc->usb2_generic_phy = devm_phy_get(dev, "usb2-phy"); 89557303488SKishon Vijay Abraham I if (IS_ERR(dwc->usb2_generic_phy)) { 89657303488SKishon Vijay Abraham I ret = PTR_ERR(dwc->usb2_generic_phy); 89757303488SKishon Vijay Abraham I if (ret == -ENOSYS || ret == -ENODEV) { 89857303488SKishon Vijay Abraham I dwc->usb2_generic_phy = NULL; 89957303488SKishon Vijay Abraham I } else if (ret == -EPROBE_DEFER) { 90057303488SKishon Vijay Abraham I return ret; 90157303488SKishon Vijay Abraham I } else { 90257303488SKishon Vijay Abraham I dev_err(dev, "no usb2 phy configured\n"); 90357303488SKishon Vijay Abraham I return ret; 90457303488SKishon Vijay Abraham I } 90557303488SKishon Vijay Abraham I } 90657303488SKishon Vijay Abraham I 90757303488SKishon Vijay Abraham I dwc->usb3_generic_phy = devm_phy_get(dev, "usb3-phy"); 90857303488SKishon Vijay Abraham I if (IS_ERR(dwc->usb3_generic_phy)) { 90957303488SKishon Vijay Abraham I ret = PTR_ERR(dwc->usb3_generic_phy); 91057303488SKishon Vijay Abraham I if (ret == -ENOSYS || ret == -ENODEV) { 91157303488SKishon Vijay Abraham I dwc->usb3_generic_phy = NULL; 91257303488SKishon Vijay Abraham I } else if (ret == -EPROBE_DEFER) { 91357303488SKishon Vijay Abraham I return ret; 91457303488SKishon Vijay Abraham I } else { 91557303488SKishon Vijay Abraham I dev_err(dev, "no usb3 phy configured\n"); 91657303488SKishon Vijay Abraham I return ret; 91757303488SKishon Vijay Abraham I } 91857303488SKishon Vijay Abraham I } 91957303488SKishon Vijay Abraham I 9203c9f94acSFelipe Balbi return 0; 9213c9f94acSFelipe Balbi } 9223c9f94acSFelipe Balbi 9235f94adfeSFelipe Balbi static int dwc3_core_init_mode(struct dwc3 *dwc) 9245f94adfeSFelipe Balbi { 9255f94adfeSFelipe Balbi struct device *dev = dwc->dev; 9265f94adfeSFelipe Balbi int ret; 9275f94adfeSFelipe Balbi 9285f94adfeSFelipe Balbi switch (dwc->dr_mode) { 9295f94adfeSFelipe Balbi case USB_DR_MODE_PERIPHERAL: 930689bf72cSManu Gautam dwc->current_dr_role = DWC3_GCTL_PRTCAP_DEVICE; 93141ce1456SRoger Quadros dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_DEVICE); 932958d1a4cSFelipe Balbi 933958d1a4cSFelipe Balbi if (dwc->usb2_phy) 934958d1a4cSFelipe Balbi otg_set_vbus(dwc->usb2_phy->otg, false); 935958d1a4cSFelipe Balbi phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_DEVICE); 936644cbbc3SManu Gautam phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_DEVICE); 937958d1a4cSFelipe Balbi 9385f94adfeSFelipe Balbi ret = dwc3_gadget_init(dwc); 9395f94adfeSFelipe Balbi if (ret) { 9409522def4SRoger Quadros if (ret != -EPROBE_DEFER) 9415f94adfeSFelipe Balbi dev_err(dev, "failed to initialize gadget\n"); 9425f94adfeSFelipe Balbi return ret; 9435f94adfeSFelipe Balbi } 9445f94adfeSFelipe Balbi break; 9455f94adfeSFelipe Balbi case USB_DR_MODE_HOST: 946689bf72cSManu Gautam dwc->current_dr_role = DWC3_GCTL_PRTCAP_HOST; 94741ce1456SRoger Quadros dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_HOST); 948958d1a4cSFelipe Balbi 949958d1a4cSFelipe Balbi if (dwc->usb2_phy) 950958d1a4cSFelipe Balbi otg_set_vbus(dwc->usb2_phy->otg, true); 951958d1a4cSFelipe Balbi phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST); 952644cbbc3SManu Gautam phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_HOST); 953958d1a4cSFelipe Balbi 9545f94adfeSFelipe Balbi ret = dwc3_host_init(dwc); 9555f94adfeSFelipe Balbi if (ret) { 9569522def4SRoger Quadros if (ret != -EPROBE_DEFER) 9575f94adfeSFelipe Balbi dev_err(dev, "failed to initialize host\n"); 9585f94adfeSFelipe Balbi return ret; 9595f94adfeSFelipe Balbi } 9605f94adfeSFelipe Balbi break; 9615f94adfeSFelipe Balbi case USB_DR_MODE_OTG: 96241ce1456SRoger Quadros INIT_WORK(&dwc->drd_work, __dwc3_set_mode); 9639840354fSRoger Quadros ret = dwc3_drd_init(dwc); 9649840354fSRoger Quadros if (ret) { 9659840354fSRoger Quadros if (ret != -EPROBE_DEFER) 9669840354fSRoger Quadros dev_err(dev, "failed to initialize dual-role\n"); 9679840354fSRoger Quadros return ret; 9689840354fSRoger Quadros } 9695f94adfeSFelipe Balbi break; 9705f94adfeSFelipe Balbi default: 9715f94adfeSFelipe Balbi dev_err(dev, "Unsupported mode of operation %d\n", dwc->dr_mode); 9725f94adfeSFelipe Balbi return -EINVAL; 9735f94adfeSFelipe Balbi } 9745f94adfeSFelipe Balbi 9755f94adfeSFelipe Balbi return 0; 9765f94adfeSFelipe Balbi } 9775f94adfeSFelipe Balbi 9785f94adfeSFelipe Balbi static void dwc3_core_exit_mode(struct dwc3 *dwc) 9795f94adfeSFelipe Balbi { 9805f94adfeSFelipe Balbi switch (dwc->dr_mode) { 9815f94adfeSFelipe Balbi case USB_DR_MODE_PERIPHERAL: 9825f94adfeSFelipe Balbi dwc3_gadget_exit(dwc); 9835f94adfeSFelipe Balbi break; 9845f94adfeSFelipe Balbi case USB_DR_MODE_HOST: 9855f94adfeSFelipe Balbi dwc3_host_exit(dwc); 9865f94adfeSFelipe Balbi break; 9875f94adfeSFelipe Balbi case USB_DR_MODE_OTG: 9889840354fSRoger Quadros dwc3_drd_exit(dwc); 9895f94adfeSFelipe Balbi break; 9905f94adfeSFelipe Balbi default: 9915f94adfeSFelipe Balbi /* do nothing */ 9925f94adfeSFelipe Balbi break; 9935f94adfeSFelipe Balbi } 9945f94adfeSFelipe Balbi } 9955f94adfeSFelipe Balbi 996c5ac6116SFelipe Balbi static void dwc3_get_properties(struct dwc3 *dwc) 9973c9f94acSFelipe Balbi { 998c5ac6116SFelipe Balbi struct device *dev = dwc->dev; 99980caf7d2SHuang Rui u8 lpm_nyet_threshold; 10006b6a0c9aSHuang Rui u8 tx_de_emphasis; 1001460d098cSHuang Rui u8 hird_threshold; 10023c9f94acSFelipe Balbi 100380caf7d2SHuang Rui /* default to highest possible threshold */ 100480caf7d2SHuang Rui lpm_nyet_threshold = 0xff; 100580caf7d2SHuang Rui 10066b6a0c9aSHuang Rui /* default to -3.5dB de-emphasis */ 10076b6a0c9aSHuang Rui tx_de_emphasis = 1; 10086b6a0c9aSHuang Rui 1009460d098cSHuang Rui /* 1010460d098cSHuang Rui * default to assert utmi_sleep_n and use maximum allowed HIRD 1011460d098cSHuang Rui * threshold value of 0b1100 1012460d098cSHuang Rui */ 1013460d098cSHuang Rui hird_threshold = 12; 1014460d098cSHuang Rui 101563863b98SHeikki Krogerus dwc->maximum_speed = usb_get_maximum_speed(dev); 101606e7114fSHeikki Krogerus dwc->dr_mode = usb_get_dr_mode(dev); 101732f2ed86SWilliam Wu dwc->hsphy_mode = of_usb_get_phy_mode(dev->of_node); 101863863b98SHeikki Krogerus 1019d64ff406SArnd Bergmann dwc->sysdev_is_parent = device_property_read_bool(dev, 1020d64ff406SArnd Bergmann "linux,sysdev_is_parent"); 1021d64ff406SArnd Bergmann if (dwc->sysdev_is_parent) 1022d64ff406SArnd Bergmann dwc->sysdev = dwc->dev->parent; 1023d64ff406SArnd Bergmann else 1024d64ff406SArnd Bergmann dwc->sysdev = dwc->dev; 1025d64ff406SArnd Bergmann 10263d128919SHeikki Krogerus dwc->has_lpm_erratum = device_property_read_bool(dev, 102780caf7d2SHuang Rui "snps,has-lpm-erratum"); 10283d128919SHeikki Krogerus device_property_read_u8(dev, "snps,lpm-nyet-threshold", 102980caf7d2SHuang Rui &lpm_nyet_threshold); 10303d128919SHeikki Krogerus dwc->is_utmi_l1_suspend = device_property_read_bool(dev, 1031460d098cSHuang Rui "snps,is-utmi-l1-suspend"); 10323d128919SHeikki Krogerus device_property_read_u8(dev, "snps,hird-threshold", 1033460d098cSHuang Rui &hird_threshold); 10343d128919SHeikki Krogerus dwc->usb3_lpm_capable = device_property_read_bool(dev, 1035eac68e8fSRobert Baldyga "snps,usb3_lpm_capable"); 10363c9f94acSFelipe Balbi 10373d128919SHeikki Krogerus dwc->disable_scramble_quirk = device_property_read_bool(dev, 10383b81221aSHuang Rui "snps,disable_scramble_quirk"); 10393d128919SHeikki Krogerus dwc->u2exit_lfps_quirk = device_property_read_bool(dev, 10409a5b2f31SHuang Rui "snps,u2exit_lfps_quirk"); 10413d128919SHeikki Krogerus dwc->u2ss_inp3_quirk = device_property_read_bool(dev, 1042b5a65c40SHuang Rui "snps,u2ss_inp3_quirk"); 10433d128919SHeikki Krogerus dwc->req_p1p2p3_quirk = device_property_read_bool(dev, 1044df31f5b3SHuang Rui "snps,req_p1p2p3_quirk"); 10453d128919SHeikki Krogerus dwc->del_p1p2p3_quirk = device_property_read_bool(dev, 1046a2a1d0f5SHuang Rui "snps,del_p1p2p3_quirk"); 10473d128919SHeikki Krogerus dwc->del_phy_power_chg_quirk = device_property_read_bool(dev, 104841c06ffdSHuang Rui "snps,del_phy_power_chg_quirk"); 10493d128919SHeikki Krogerus dwc->lfps_filter_quirk = device_property_read_bool(dev, 1050fb67afcaSHuang Rui "snps,lfps_filter_quirk"); 10513d128919SHeikki Krogerus dwc->rx_detect_poll_quirk = device_property_read_bool(dev, 105214f4ac53SHuang Rui "snps,rx_detect_poll_quirk"); 10533d128919SHeikki Krogerus dwc->dis_u3_susphy_quirk = device_property_read_bool(dev, 105459acfa20SHuang Rui "snps,dis_u3_susphy_quirk"); 10553d128919SHeikki Krogerus dwc->dis_u2_susphy_quirk = device_property_read_bool(dev, 10560effe0a3SHuang Rui "snps,dis_u2_susphy_quirk"); 1057ec791d14SJohn Youn dwc->dis_enblslpm_quirk = device_property_read_bool(dev, 1058ec791d14SJohn Youn "snps,dis_enblslpm_quirk"); 1059e58dd357SRajesh Bhagat dwc->dis_rxdet_inp3_quirk = device_property_read_bool(dev, 1060e58dd357SRajesh Bhagat "snps,dis_rxdet_inp3_quirk"); 106116199f33SWilliam Wu dwc->dis_u2_freeclk_exists_quirk = device_property_read_bool(dev, 106216199f33SWilliam Wu "snps,dis-u2-freeclk-exists-quirk"); 106300fe081dSWilliam Wu dwc->dis_del_phy_power_chg_quirk = device_property_read_bool(dev, 106400fe081dSWilliam Wu "snps,dis-del-phy-power-chg-quirk"); 106565db7a0cSWilliam Wu dwc->dis_tx_ipgap_linecheck_quirk = device_property_read_bool(dev, 106665db7a0cSWilliam Wu "snps,dis-tx-ipgap-linecheck-quirk"); 10676b6a0c9aSHuang Rui 10683d128919SHeikki Krogerus dwc->tx_de_emphasis_quirk = device_property_read_bool(dev, 10696b6a0c9aSHuang Rui "snps,tx_de_emphasis_quirk"); 10703d128919SHeikki Krogerus device_property_read_u8(dev, "snps,tx_de_emphasis", 10716b6a0c9aSHuang Rui &tx_de_emphasis); 10723d128919SHeikki Krogerus device_property_read_string(dev, "snps,hsphy_interface", 10733e10a2ceSHeikki Krogerus &dwc->hsphy_interface); 10743d128919SHeikki Krogerus device_property_read_u32(dev, "snps,quirk-frame-length-adjustment", 1075bcdb3272SFelipe Balbi &dwc->fladj); 10763d128919SHeikki Krogerus 107780caf7d2SHuang Rui dwc->lpm_nyet_threshold = lpm_nyet_threshold; 10786b6a0c9aSHuang Rui dwc->tx_de_emphasis = tx_de_emphasis; 107980caf7d2SHuang Rui 1080460d098cSHuang Rui dwc->hird_threshold = hird_threshold 1081460d098cSHuang Rui | (dwc->is_utmi_l1_suspend << 4); 1082460d098cSHuang Rui 1083cf40b86bSJohn Youn dwc->imod_interval = 0; 1084cf40b86bSJohn Youn } 1085cf40b86bSJohn Youn 1086cf40b86bSJohn Youn /* check whether the core supports IMOD */ 1087cf40b86bSJohn Youn bool dwc3_has_imod(struct dwc3 *dwc) 1088cf40b86bSJohn Youn { 1089cf40b86bSJohn Youn return ((dwc3_is_usb3(dwc) && 1090cf40b86bSJohn Youn dwc->revision >= DWC3_REVISION_300A) || 1091cf40b86bSJohn Youn (dwc3_is_usb31(dwc) && 1092cf40b86bSJohn Youn dwc->revision >= DWC3_USB31_REVISION_120A)); 1093c5ac6116SFelipe Balbi } 1094c5ac6116SFelipe Balbi 10957ac51a12SJohn Youn static void dwc3_check_params(struct dwc3 *dwc) 10967ac51a12SJohn Youn { 10977ac51a12SJohn Youn struct device *dev = dwc->dev; 10987ac51a12SJohn Youn 1099cf40b86bSJohn Youn /* Check for proper value of imod_interval */ 1100cf40b86bSJohn Youn if (dwc->imod_interval && !dwc3_has_imod(dwc)) { 1101cf40b86bSJohn Youn dev_warn(dwc->dev, "Interrupt moderation not supported\n"); 1102cf40b86bSJohn Youn dwc->imod_interval = 0; 1103cf40b86bSJohn Youn } 1104cf40b86bSJohn Youn 110528632b44SJohn Youn /* 110628632b44SJohn Youn * Workaround for STAR 9000961433 which affects only version 110728632b44SJohn Youn * 3.00a of the DWC_usb3 core. This prevents the controller 110828632b44SJohn Youn * interrupt from being masked while handling events. IMOD 110928632b44SJohn Youn * allows us to work around this issue. Enable it for the 111028632b44SJohn Youn * affected version. 111128632b44SJohn Youn */ 111228632b44SJohn Youn if (!dwc->imod_interval && 111328632b44SJohn Youn (dwc->revision == DWC3_REVISION_300A)) 111428632b44SJohn Youn dwc->imod_interval = 1; 111528632b44SJohn Youn 11167ac51a12SJohn Youn /* Check the maximum_speed parameter */ 11177ac51a12SJohn Youn switch (dwc->maximum_speed) { 11187ac51a12SJohn Youn case USB_SPEED_LOW: 11197ac51a12SJohn Youn case USB_SPEED_FULL: 11207ac51a12SJohn Youn case USB_SPEED_HIGH: 11217ac51a12SJohn Youn case USB_SPEED_SUPER: 11227ac51a12SJohn Youn case USB_SPEED_SUPER_PLUS: 11237ac51a12SJohn Youn break; 11247ac51a12SJohn Youn default: 11257ac51a12SJohn Youn dev_err(dev, "invalid maximum_speed parameter %d\n", 11267ac51a12SJohn Youn dwc->maximum_speed); 11277ac51a12SJohn Youn /* fall through */ 11287ac51a12SJohn Youn case USB_SPEED_UNKNOWN: 11297ac51a12SJohn Youn /* default to superspeed */ 11307ac51a12SJohn Youn dwc->maximum_speed = USB_SPEED_SUPER; 11317ac51a12SJohn Youn 11327ac51a12SJohn Youn /* 11337ac51a12SJohn Youn * default to superspeed plus if we are capable. 11347ac51a12SJohn Youn */ 11357ac51a12SJohn Youn if (dwc3_is_usb31(dwc) && 11367ac51a12SJohn Youn (DWC3_GHWPARAMS3_SSPHY_IFC(dwc->hwparams.hwparams3) == 11377ac51a12SJohn Youn DWC3_GHWPARAMS3_SSPHY_IFC_GEN2)) 11387ac51a12SJohn Youn dwc->maximum_speed = USB_SPEED_SUPER_PLUS; 11397ac51a12SJohn Youn 11407ac51a12SJohn Youn break; 11417ac51a12SJohn Youn } 11427ac51a12SJohn Youn } 11437ac51a12SJohn Youn 1144c5ac6116SFelipe Balbi static int dwc3_probe(struct platform_device *pdev) 1145c5ac6116SFelipe Balbi { 1146c5ac6116SFelipe Balbi struct device *dev = &pdev->dev; 1147c5ac6116SFelipe Balbi struct resource *res; 1148c5ac6116SFelipe Balbi struct dwc3 *dwc; 1149c5ac6116SFelipe Balbi 1150c5ac6116SFelipe Balbi int ret; 1151c5ac6116SFelipe Balbi 1152c5ac6116SFelipe Balbi void __iomem *regs; 1153c5ac6116SFelipe Balbi 1154c5ac6116SFelipe Balbi dwc = devm_kzalloc(dev, sizeof(*dwc), GFP_KERNEL); 1155c5ac6116SFelipe Balbi if (!dwc) 1156c5ac6116SFelipe Balbi return -ENOMEM; 1157c5ac6116SFelipe Balbi 1158c5ac6116SFelipe Balbi dwc->dev = dev; 1159c5ac6116SFelipe Balbi 1160c5ac6116SFelipe Balbi res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1161c5ac6116SFelipe Balbi if (!res) { 1162c5ac6116SFelipe Balbi dev_err(dev, "missing memory resource\n"); 1163c5ac6116SFelipe Balbi return -ENODEV; 1164c5ac6116SFelipe Balbi } 1165c5ac6116SFelipe Balbi 1166c5ac6116SFelipe Balbi dwc->xhci_resources[0].start = res->start; 1167c5ac6116SFelipe Balbi dwc->xhci_resources[0].end = dwc->xhci_resources[0].start + 1168c5ac6116SFelipe Balbi DWC3_XHCI_REGS_END; 1169c5ac6116SFelipe Balbi dwc->xhci_resources[0].flags = res->flags; 1170c5ac6116SFelipe Balbi dwc->xhci_resources[0].name = res->name; 1171c5ac6116SFelipe Balbi 1172c5ac6116SFelipe Balbi res->start += DWC3_GLOBALS_REGS_START; 1173c5ac6116SFelipe Balbi 1174c5ac6116SFelipe Balbi /* 1175c5ac6116SFelipe Balbi * Request memory region but exclude xHCI regs, 1176c5ac6116SFelipe Balbi * since it will be requested by the xhci-plat driver. 1177c5ac6116SFelipe Balbi */ 1178c5ac6116SFelipe Balbi regs = devm_ioremap_resource(dev, res); 1179c5ac6116SFelipe Balbi if (IS_ERR(regs)) { 1180c5ac6116SFelipe Balbi ret = PTR_ERR(regs); 1181c5ac6116SFelipe Balbi goto err0; 1182c5ac6116SFelipe Balbi } 1183c5ac6116SFelipe Balbi 1184c5ac6116SFelipe Balbi dwc->regs = regs; 1185c5ac6116SFelipe Balbi dwc->regs_size = resource_size(res); 1186c5ac6116SFelipe Balbi 1187c5ac6116SFelipe Balbi dwc3_get_properties(dwc); 1188c5ac6116SFelipe Balbi 11896c89cce0SHeikki Krogerus platform_set_drvdata(pdev, dwc); 11902917e718SHeikki Krogerus dwc3_cache_hwparams(dwc); 11916c89cce0SHeikki Krogerus 119272246da4SFelipe Balbi spin_lock_init(&dwc->lock); 119372246da4SFelipe Balbi 1194fc8bb91bSFelipe Balbi pm_runtime_set_active(dev); 1195fc8bb91bSFelipe Balbi pm_runtime_use_autosuspend(dev); 1196fc8bb91bSFelipe Balbi pm_runtime_set_autosuspend_delay(dev, DWC3_DEFAULT_AUTOSUSPEND_DELAY); 1197802ca850SChanho Park pm_runtime_enable(dev); 119832808237SRoger Quadros ret = pm_runtime_get_sync(dev); 119932808237SRoger Quadros if (ret < 0) 120032808237SRoger Quadros goto err1; 120132808237SRoger Quadros 1202802ca850SChanho Park pm_runtime_forbid(dev); 120372246da4SFelipe Balbi 12043921426bSFelipe Balbi ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE); 12053921426bSFelipe Balbi if (ret) { 12063921426bSFelipe Balbi dev_err(dwc->dev, "failed to allocate event buffers\n"); 12073921426bSFelipe Balbi ret = -ENOMEM; 120832808237SRoger Quadros goto err2; 12093921426bSFelipe Balbi } 12103921426bSFelipe Balbi 12119d6173e1SThinh Nguyen ret = dwc3_get_dr_mode(dwc); 12129d6173e1SThinh Nguyen if (ret) 12139d6173e1SThinh Nguyen goto err3; 121432a4a135SFelipe Balbi 1215c499ff71SFelipe Balbi ret = dwc3_alloc_scratch_buffers(dwc); 1216c499ff71SFelipe Balbi if (ret) 121732808237SRoger Quadros goto err3; 1218c499ff71SFelipe Balbi 121972246da4SFelipe Balbi ret = dwc3_core_init(dwc); 122072246da4SFelipe Balbi if (ret) { 1221802ca850SChanho Park dev_err(dev, "failed to initialize core\n"); 122232808237SRoger Quadros goto err4; 122372246da4SFelipe Balbi } 122472246da4SFelipe Balbi 12257ac51a12SJohn Youn dwc3_check_params(dwc); 12262c7f1bd9SJohn Youn 12275f94adfeSFelipe Balbi ret = dwc3_core_init_mode(dwc); 12285f94adfeSFelipe Balbi if (ret) 122932808237SRoger Quadros goto err5; 123072246da4SFelipe Balbi 12314e9f3118SDu, Changbin dwc3_debugfs_init(dwc); 1232fc8bb91bSFelipe Balbi pm_runtime_put(dev); 123372246da4SFelipe Balbi 123472246da4SFelipe Balbi return 0; 123572246da4SFelipe Balbi 123632808237SRoger Quadros err5: 1237f122d33eSFelipe Balbi dwc3_event_buffers_cleanup(dwc); 1238f122d33eSFelipe Balbi 123932808237SRoger Quadros err4: 1240c499ff71SFelipe Balbi dwc3_free_scratch_buffers(dwc); 124172246da4SFelipe Balbi 124232808237SRoger Quadros err3: 12433921426bSFelipe Balbi dwc3_free_event_buffers(dwc); 124488bc9d19SHeikki Krogerus dwc3_ulpi_exit(dwc); 12453921426bSFelipe Balbi 124632808237SRoger Quadros err2: 124732808237SRoger Quadros pm_runtime_allow(&pdev->dev); 124832808237SRoger Quadros 124932808237SRoger Quadros err1: 125032808237SRoger Quadros pm_runtime_put_sync(&pdev->dev); 125132808237SRoger Quadros pm_runtime_disable(&pdev->dev); 125232808237SRoger Quadros 12533da1f6eeSFelipe Balbi err0: 12543da1f6eeSFelipe Balbi /* 12553da1f6eeSFelipe Balbi * restore res->start back to its original value so that, in case the 12563da1f6eeSFelipe Balbi * probe is deferred, we don't end up getting error in request the 12573da1f6eeSFelipe Balbi * memory region the next time probe is called. 12583da1f6eeSFelipe Balbi */ 12593da1f6eeSFelipe Balbi res->start -= DWC3_GLOBALS_REGS_START; 12603da1f6eeSFelipe Balbi 126172246da4SFelipe Balbi return ret; 126272246da4SFelipe Balbi } 126372246da4SFelipe Balbi 1264fb4e98abSBill Pemberton static int dwc3_remove(struct platform_device *pdev) 126572246da4SFelipe Balbi { 126672246da4SFelipe Balbi struct dwc3 *dwc = platform_get_drvdata(pdev); 12673da1f6eeSFelipe Balbi struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 12683da1f6eeSFelipe Balbi 1269fc8bb91bSFelipe Balbi pm_runtime_get_sync(&pdev->dev); 12703da1f6eeSFelipe Balbi /* 12713da1f6eeSFelipe Balbi * restore res->start back to its original value so that, in case the 12723da1f6eeSFelipe Balbi * probe is deferred, we don't end up getting error in request the 12733da1f6eeSFelipe Balbi * memory region the next time probe is called. 12743da1f6eeSFelipe Balbi */ 12753da1f6eeSFelipe Balbi res->start -= DWC3_GLOBALS_REGS_START; 127672246da4SFelipe Balbi 1277dc99f16fSFelipe Balbi dwc3_debugfs_exit(dwc); 1278dc99f16fSFelipe Balbi dwc3_core_exit_mode(dwc); 12798ba007a9SKishon Vijay Abraham I 128072246da4SFelipe Balbi dwc3_core_exit(dwc); 128188bc9d19SHeikki Krogerus dwc3_ulpi_exit(dwc); 128272246da4SFelipe Balbi 1283fc8bb91bSFelipe Balbi pm_runtime_put_sync(&pdev->dev); 1284fc8bb91bSFelipe Balbi pm_runtime_allow(&pdev->dev); 1285fc8bb91bSFelipe Balbi pm_runtime_disable(&pdev->dev); 1286fc8bb91bSFelipe Balbi 1287c499ff71SFelipe Balbi dwc3_free_event_buffers(dwc); 1288c499ff71SFelipe Balbi dwc3_free_scratch_buffers(dwc); 1289c499ff71SFelipe Balbi 129072246da4SFelipe Balbi return 0; 129172246da4SFelipe Balbi } 129272246da4SFelipe Balbi 1293fc8bb91bSFelipe Balbi #ifdef CONFIG_PM 1294fc8bb91bSFelipe Balbi static int dwc3_suspend_common(struct dwc3 *dwc) 12957415f17cSFelipe Balbi { 1296fc8bb91bSFelipe Balbi unsigned long flags; 12977415f17cSFelipe Balbi 1298689bf72cSManu Gautam switch (dwc->current_dr_role) { 1299689bf72cSManu Gautam case DWC3_GCTL_PRTCAP_DEVICE: 1300fc8bb91bSFelipe Balbi spin_lock_irqsave(&dwc->lock, flags); 13017415f17cSFelipe Balbi dwc3_gadget_suspend(dwc); 1302fc8bb91bSFelipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 1303689bf72cSManu Gautam dwc3_core_exit(dwc); 130451f5d49aSFelipe Balbi break; 1305689bf72cSManu Gautam case DWC3_GCTL_PRTCAP_HOST: 13067415f17cSFelipe Balbi default: 130751f5d49aSFelipe Balbi /* do nothing */ 13087415f17cSFelipe Balbi break; 13097415f17cSFelipe Balbi } 13107415f17cSFelipe Balbi 1311fc8bb91bSFelipe Balbi return 0; 1312fc8bb91bSFelipe Balbi } 1313fc8bb91bSFelipe Balbi 1314fc8bb91bSFelipe Balbi static int dwc3_resume_common(struct dwc3 *dwc) 1315fc8bb91bSFelipe Balbi { 1316fc8bb91bSFelipe Balbi unsigned long flags; 1317fc8bb91bSFelipe Balbi int ret; 1318fc8bb91bSFelipe Balbi 1319689bf72cSManu Gautam switch (dwc->current_dr_role) { 1320689bf72cSManu Gautam case DWC3_GCTL_PRTCAP_DEVICE: 1321fc8bb91bSFelipe Balbi ret = dwc3_core_init(dwc); 1322fc8bb91bSFelipe Balbi if (ret) 1323fc8bb91bSFelipe Balbi return ret; 1324fc8bb91bSFelipe Balbi 1325fc8bb91bSFelipe Balbi spin_lock_irqsave(&dwc->lock, flags); 1326fc8bb91bSFelipe Balbi dwc3_gadget_resume(dwc); 1327fc8bb91bSFelipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 1328689bf72cSManu Gautam break; 1329689bf72cSManu Gautam case DWC3_GCTL_PRTCAP_HOST: 1330fc8bb91bSFelipe Balbi default: 1331fc8bb91bSFelipe Balbi /* do nothing */ 1332fc8bb91bSFelipe Balbi break; 1333fc8bb91bSFelipe Balbi } 1334fc8bb91bSFelipe Balbi 1335fc8bb91bSFelipe Balbi return 0; 1336fc8bb91bSFelipe Balbi } 1337fc8bb91bSFelipe Balbi 1338fc8bb91bSFelipe Balbi static int dwc3_runtime_checks(struct dwc3 *dwc) 1339fc8bb91bSFelipe Balbi { 1340689bf72cSManu Gautam switch (dwc->current_dr_role) { 1341fc8bb91bSFelipe Balbi case USB_DR_MODE_PERIPHERAL: 1342fc8bb91bSFelipe Balbi case USB_DR_MODE_OTG: 1343fc8bb91bSFelipe Balbi if (dwc->connected) 1344fc8bb91bSFelipe Balbi return -EBUSY; 1345fc8bb91bSFelipe Balbi break; 1346fc8bb91bSFelipe Balbi case USB_DR_MODE_HOST: 1347fc8bb91bSFelipe Balbi default: 1348fc8bb91bSFelipe Balbi /* do nothing */ 1349fc8bb91bSFelipe Balbi break; 1350fc8bb91bSFelipe Balbi } 1351fc8bb91bSFelipe Balbi 1352fc8bb91bSFelipe Balbi return 0; 1353fc8bb91bSFelipe Balbi } 1354fc8bb91bSFelipe Balbi 1355fc8bb91bSFelipe Balbi static int dwc3_runtime_suspend(struct device *dev) 1356fc8bb91bSFelipe Balbi { 1357fc8bb91bSFelipe Balbi struct dwc3 *dwc = dev_get_drvdata(dev); 1358fc8bb91bSFelipe Balbi int ret; 1359fc8bb91bSFelipe Balbi 1360fc8bb91bSFelipe Balbi if (dwc3_runtime_checks(dwc)) 1361fc8bb91bSFelipe Balbi return -EBUSY; 1362fc8bb91bSFelipe Balbi 1363fc8bb91bSFelipe Balbi ret = dwc3_suspend_common(dwc); 1364fc8bb91bSFelipe Balbi if (ret) 1365fc8bb91bSFelipe Balbi return ret; 1366fc8bb91bSFelipe Balbi 1367fc8bb91bSFelipe Balbi device_init_wakeup(dev, true); 1368fc8bb91bSFelipe Balbi 1369fc8bb91bSFelipe Balbi return 0; 1370fc8bb91bSFelipe Balbi } 1371fc8bb91bSFelipe Balbi 1372fc8bb91bSFelipe Balbi static int dwc3_runtime_resume(struct device *dev) 1373fc8bb91bSFelipe Balbi { 1374fc8bb91bSFelipe Balbi struct dwc3 *dwc = dev_get_drvdata(dev); 1375fc8bb91bSFelipe Balbi int ret; 1376fc8bb91bSFelipe Balbi 1377fc8bb91bSFelipe Balbi device_init_wakeup(dev, false); 1378fc8bb91bSFelipe Balbi 1379fc8bb91bSFelipe Balbi ret = dwc3_resume_common(dwc); 1380fc8bb91bSFelipe Balbi if (ret) 1381fc8bb91bSFelipe Balbi return ret; 1382fc8bb91bSFelipe Balbi 1383689bf72cSManu Gautam switch (dwc->current_dr_role) { 1384689bf72cSManu Gautam case DWC3_GCTL_PRTCAP_DEVICE: 1385fc8bb91bSFelipe Balbi dwc3_gadget_process_pending_events(dwc); 1386fc8bb91bSFelipe Balbi break; 1387689bf72cSManu Gautam case DWC3_GCTL_PRTCAP_HOST: 1388fc8bb91bSFelipe Balbi default: 1389fc8bb91bSFelipe Balbi /* do nothing */ 1390fc8bb91bSFelipe Balbi break; 1391fc8bb91bSFelipe Balbi } 1392fc8bb91bSFelipe Balbi 1393fc8bb91bSFelipe Balbi pm_runtime_mark_last_busy(dev); 1394fc8bb91bSFelipe Balbi 1395fc8bb91bSFelipe Balbi return 0; 1396fc8bb91bSFelipe Balbi } 1397fc8bb91bSFelipe Balbi 1398fc8bb91bSFelipe Balbi static int dwc3_runtime_idle(struct device *dev) 1399fc8bb91bSFelipe Balbi { 1400fc8bb91bSFelipe Balbi struct dwc3 *dwc = dev_get_drvdata(dev); 1401fc8bb91bSFelipe Balbi 1402689bf72cSManu Gautam switch (dwc->current_dr_role) { 1403689bf72cSManu Gautam case DWC3_GCTL_PRTCAP_DEVICE: 1404fc8bb91bSFelipe Balbi if (dwc3_runtime_checks(dwc)) 1405fc8bb91bSFelipe Balbi return -EBUSY; 1406fc8bb91bSFelipe Balbi break; 1407689bf72cSManu Gautam case DWC3_GCTL_PRTCAP_HOST: 1408fc8bb91bSFelipe Balbi default: 1409fc8bb91bSFelipe Balbi /* do nothing */ 1410fc8bb91bSFelipe Balbi break; 1411fc8bb91bSFelipe Balbi } 1412fc8bb91bSFelipe Balbi 1413fc8bb91bSFelipe Balbi pm_runtime_mark_last_busy(dev); 1414fc8bb91bSFelipe Balbi pm_runtime_autosuspend(dev); 1415fc8bb91bSFelipe Balbi 1416fc8bb91bSFelipe Balbi return 0; 1417fc8bb91bSFelipe Balbi } 1418fc8bb91bSFelipe Balbi #endif /* CONFIG_PM */ 1419fc8bb91bSFelipe Balbi 1420fc8bb91bSFelipe Balbi #ifdef CONFIG_PM_SLEEP 1421fc8bb91bSFelipe Balbi static int dwc3_suspend(struct device *dev) 1422fc8bb91bSFelipe Balbi { 1423fc8bb91bSFelipe Balbi struct dwc3 *dwc = dev_get_drvdata(dev); 1424fc8bb91bSFelipe Balbi int ret; 1425fc8bb91bSFelipe Balbi 1426fc8bb91bSFelipe Balbi ret = dwc3_suspend_common(dwc); 1427fc8bb91bSFelipe Balbi if (ret) 1428fc8bb91bSFelipe Balbi return ret; 1429fc8bb91bSFelipe Balbi 14306344475fSSekhar Nori pinctrl_pm_select_sleep_state(dev); 14316344475fSSekhar Nori 14327415f17cSFelipe Balbi return 0; 14337415f17cSFelipe Balbi } 14347415f17cSFelipe Balbi 14357415f17cSFelipe Balbi static int dwc3_resume(struct device *dev) 14367415f17cSFelipe Balbi { 14377415f17cSFelipe Balbi struct dwc3 *dwc = dev_get_drvdata(dev); 143857303488SKishon Vijay Abraham I int ret; 14397415f17cSFelipe Balbi 14406344475fSSekhar Nori pinctrl_pm_select_default_state(dev); 14416344475fSSekhar Nori 1442fc8bb91bSFelipe Balbi ret = dwc3_resume_common(dwc); 144351f5d49aSFelipe Balbi if (ret) 14445c4ad318SFelipe Balbi return ret; 14455c4ad318SFelipe Balbi 14467415f17cSFelipe Balbi pm_runtime_disable(dev); 14477415f17cSFelipe Balbi pm_runtime_set_active(dev); 14487415f17cSFelipe Balbi pm_runtime_enable(dev); 14497415f17cSFelipe Balbi 14507415f17cSFelipe Balbi return 0; 14517415f17cSFelipe Balbi } 14527f370ed0SFelipe Balbi #endif /* CONFIG_PM_SLEEP */ 14537415f17cSFelipe Balbi 14547415f17cSFelipe Balbi static const struct dev_pm_ops dwc3_dev_pm_ops = { 14557415f17cSFelipe Balbi SET_SYSTEM_SLEEP_PM_OPS(dwc3_suspend, dwc3_resume) 1456fc8bb91bSFelipe Balbi SET_RUNTIME_PM_OPS(dwc3_runtime_suspend, dwc3_runtime_resume, 1457fc8bb91bSFelipe Balbi dwc3_runtime_idle) 14587415f17cSFelipe Balbi }; 14597415f17cSFelipe Balbi 14605088b6f5SKishon Vijay Abraham I #ifdef CONFIG_OF 14615088b6f5SKishon Vijay Abraham I static const struct of_device_id of_dwc3_match[] = { 14625088b6f5SKishon Vijay Abraham I { 146322a5aa17SFelipe Balbi .compatible = "snps,dwc3" 146422a5aa17SFelipe Balbi }, 146522a5aa17SFelipe Balbi { 14665088b6f5SKishon Vijay Abraham I .compatible = "synopsys,dwc3" 14675088b6f5SKishon Vijay Abraham I }, 14685088b6f5SKishon Vijay Abraham I { }, 14695088b6f5SKishon Vijay Abraham I }; 14705088b6f5SKishon Vijay Abraham I MODULE_DEVICE_TABLE(of, of_dwc3_match); 14715088b6f5SKishon Vijay Abraham I #endif 14725088b6f5SKishon Vijay Abraham I 1473404905a6SHeikki Krogerus #ifdef CONFIG_ACPI 1474404905a6SHeikki Krogerus 1475404905a6SHeikki Krogerus #define ACPI_ID_INTEL_BSW "808622B7" 1476404905a6SHeikki Krogerus 1477404905a6SHeikki Krogerus static const struct acpi_device_id dwc3_acpi_match[] = { 1478404905a6SHeikki Krogerus { ACPI_ID_INTEL_BSW, 0 }, 1479404905a6SHeikki Krogerus { }, 1480404905a6SHeikki Krogerus }; 1481404905a6SHeikki Krogerus MODULE_DEVICE_TABLE(acpi, dwc3_acpi_match); 1482404905a6SHeikki Krogerus #endif 1483404905a6SHeikki Krogerus 148472246da4SFelipe Balbi static struct platform_driver dwc3_driver = { 148572246da4SFelipe Balbi .probe = dwc3_probe, 14867690417dSBill Pemberton .remove = dwc3_remove, 148772246da4SFelipe Balbi .driver = { 148872246da4SFelipe Balbi .name = "dwc3", 14895088b6f5SKishon Vijay Abraham I .of_match_table = of_match_ptr(of_dwc3_match), 1490404905a6SHeikki Krogerus .acpi_match_table = ACPI_PTR(dwc3_acpi_match), 14917f370ed0SFelipe Balbi .pm = &dwc3_dev_pm_ops, 149272246da4SFelipe Balbi }, 149372246da4SFelipe Balbi }; 149472246da4SFelipe Balbi 1495b1116dccSTobias Klauser module_platform_driver(dwc3_driver); 1496b1116dccSTobias Klauser 14977ae4fc4dSSebastian Andrzej Siewior MODULE_ALIAS("platform:dwc3"); 149872246da4SFelipe Balbi MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); 14995945f789SFelipe Balbi MODULE_LICENSE("GPL v2"); 150072246da4SFelipe Balbi MODULE_DESCRIPTION("DesignWare USB3 DRD Controller Driver"); 1501