172246da4SFelipe Balbi /** 272246da4SFelipe Balbi * core.c - DesignWare USB3 DRD Controller Core file 372246da4SFelipe Balbi * 472246da4SFelipe Balbi * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com 572246da4SFelipe Balbi * 672246da4SFelipe Balbi * Authors: Felipe Balbi <balbi@ti.com>, 772246da4SFelipe Balbi * Sebastian Andrzej Siewior <bigeasy@linutronix.de> 872246da4SFelipe Balbi * 95945f789SFelipe Balbi * This program is free software: you can redistribute it and/or modify 105945f789SFelipe Balbi * it under the terms of the GNU General Public License version 2 of 115945f789SFelipe Balbi * the License as published by the Free Software Foundation. 1272246da4SFelipe Balbi * 135945f789SFelipe Balbi * This program is distributed in the hope that it will be useful, 145945f789SFelipe Balbi * but WITHOUT ANY WARRANTY; without even the implied warranty of 155945f789SFelipe Balbi * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 165945f789SFelipe Balbi * GNU General Public License for more details. 1772246da4SFelipe Balbi * 185945f789SFelipe Balbi * You should have received a copy of the GNU General Public License 195945f789SFelipe Balbi * along with this program. If not, see <http://www.gnu.org/licenses/>. 2072246da4SFelipe Balbi */ 2172246da4SFelipe Balbi 22fa0ea13eSFelipe Balbi #include <linux/version.h> 23a72e658bSFelipe Balbi #include <linux/module.h> 2472246da4SFelipe Balbi #include <linux/kernel.h> 2572246da4SFelipe Balbi #include <linux/slab.h> 2672246da4SFelipe Balbi #include <linux/spinlock.h> 2772246da4SFelipe Balbi #include <linux/platform_device.h> 2872246da4SFelipe Balbi #include <linux/pm_runtime.h> 2972246da4SFelipe Balbi #include <linux/interrupt.h> 3072246da4SFelipe Balbi #include <linux/ioport.h> 3172246da4SFelipe Balbi #include <linux/io.h> 3272246da4SFelipe Balbi #include <linux/list.h> 3372246da4SFelipe Balbi #include <linux/delay.h> 3472246da4SFelipe Balbi #include <linux/dma-mapping.h> 35457e84b6SFelipe Balbi #include <linux/of.h> 36404905a6SHeikki Krogerus #include <linux/acpi.h> 3772246da4SFelipe Balbi 3872246da4SFelipe Balbi #include <linux/usb/ch9.h> 3972246da4SFelipe Balbi #include <linux/usb/gadget.h> 40f7e846f0SFelipe Balbi #include <linux/usb/of.h> 41a45c82b8SRuchika Kharwar #include <linux/usb/otg.h> 4272246da4SFelipe Balbi 436462cbd5SFelipe Balbi #include "platform_data.h" 4472246da4SFelipe Balbi #include "core.h" 4572246da4SFelipe Balbi #include "gadget.h" 4672246da4SFelipe Balbi #include "io.h" 4772246da4SFelipe Balbi 4872246da4SFelipe Balbi #include "debug.h" 4972246da4SFelipe Balbi 508300dd23SFelipe Balbi /* -------------------------------------------------------------------------- */ 518300dd23SFelipe Balbi 523140e8cbSSebastian Andrzej Siewior void dwc3_set_mode(struct dwc3 *dwc, u32 mode) 533140e8cbSSebastian Andrzej Siewior { 543140e8cbSSebastian Andrzej Siewior u32 reg; 553140e8cbSSebastian Andrzej Siewior 563140e8cbSSebastian Andrzej Siewior reg = dwc3_readl(dwc->regs, DWC3_GCTL); 573140e8cbSSebastian Andrzej Siewior reg &= ~(DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_OTG)); 583140e8cbSSebastian Andrzej Siewior reg |= DWC3_GCTL_PRTCAPDIR(mode); 593140e8cbSSebastian Andrzej Siewior dwc3_writel(dwc->regs, DWC3_GCTL, reg); 603140e8cbSSebastian Andrzej Siewior } 618300dd23SFelipe Balbi 6272246da4SFelipe Balbi /** 6372246da4SFelipe Balbi * dwc3_core_soft_reset - Issues core soft reset and PHY reset 6472246da4SFelipe Balbi * @dwc: pointer to our context structure 6572246da4SFelipe Balbi */ 6657303488SKishon Vijay Abraham I static int dwc3_core_soft_reset(struct dwc3 *dwc) 6772246da4SFelipe Balbi { 6872246da4SFelipe Balbi u32 reg; 6957303488SKishon Vijay Abraham I int ret; 7072246da4SFelipe Balbi 7172246da4SFelipe Balbi /* Before Resetting PHY, put Core in Reset */ 7272246da4SFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GCTL); 7372246da4SFelipe Balbi reg |= DWC3_GCTL_CORESOFTRESET; 7472246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GCTL, reg); 7572246da4SFelipe Balbi 7672246da4SFelipe Balbi /* Assert USB3 PHY reset */ 7772246da4SFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); 7872246da4SFelipe Balbi reg |= DWC3_GUSB3PIPECTL_PHYSOFTRST; 7972246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); 8072246da4SFelipe Balbi 8172246da4SFelipe Balbi /* Assert USB2 PHY reset */ 8272246da4SFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); 8372246da4SFelipe Balbi reg |= DWC3_GUSB2PHYCFG_PHYSOFTRST; 8472246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); 8572246da4SFelipe Balbi 8651e1e7bcSFelipe Balbi usb_phy_init(dwc->usb2_phy); 8751e1e7bcSFelipe Balbi usb_phy_init(dwc->usb3_phy); 8857303488SKishon Vijay Abraham I ret = phy_init(dwc->usb2_generic_phy); 8957303488SKishon Vijay Abraham I if (ret < 0) 9057303488SKishon Vijay Abraham I return ret; 9157303488SKishon Vijay Abraham I 9257303488SKishon Vijay Abraham I ret = phy_init(dwc->usb3_generic_phy); 9357303488SKishon Vijay Abraham I if (ret < 0) { 9457303488SKishon Vijay Abraham I phy_exit(dwc->usb2_generic_phy); 9557303488SKishon Vijay Abraham I return ret; 9657303488SKishon Vijay Abraham I } 9772246da4SFelipe Balbi mdelay(100); 9872246da4SFelipe Balbi 9972246da4SFelipe Balbi /* Clear USB3 PHY reset */ 10072246da4SFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); 10172246da4SFelipe Balbi reg &= ~DWC3_GUSB3PIPECTL_PHYSOFTRST; 10272246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); 10372246da4SFelipe Balbi 10472246da4SFelipe Balbi /* Clear USB2 PHY reset */ 10572246da4SFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); 10672246da4SFelipe Balbi reg &= ~DWC3_GUSB2PHYCFG_PHYSOFTRST; 10772246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); 10872246da4SFelipe Balbi 10945627ac6SPratyush Anand mdelay(100); 11045627ac6SPratyush Anand 11172246da4SFelipe Balbi /* After PHYs are stable we can take Core out of reset state */ 11272246da4SFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GCTL); 11372246da4SFelipe Balbi reg &= ~DWC3_GCTL_CORESOFTRESET; 11472246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GCTL, reg); 11557303488SKishon Vijay Abraham I 11657303488SKishon Vijay Abraham I return 0; 11772246da4SFelipe Balbi } 11872246da4SFelipe Balbi 11972246da4SFelipe Balbi /** 12072246da4SFelipe Balbi * dwc3_free_one_event_buffer - Frees one event buffer 12172246da4SFelipe Balbi * @dwc: Pointer to our controller context structure 12272246da4SFelipe Balbi * @evt: Pointer to event buffer to be freed 12372246da4SFelipe Balbi */ 12472246da4SFelipe Balbi static void dwc3_free_one_event_buffer(struct dwc3 *dwc, 12572246da4SFelipe Balbi struct dwc3_event_buffer *evt) 12672246da4SFelipe Balbi { 12772246da4SFelipe Balbi dma_free_coherent(dwc->dev, evt->length, evt->buf, evt->dma); 12872246da4SFelipe Balbi } 12972246da4SFelipe Balbi 13072246da4SFelipe Balbi /** 1311d046793SPaul Zimmerman * dwc3_alloc_one_event_buffer - Allocates one event buffer structure 13272246da4SFelipe Balbi * @dwc: Pointer to our controller context structure 13372246da4SFelipe Balbi * @length: size of the event buffer 13472246da4SFelipe Balbi * 1351d046793SPaul Zimmerman * Returns a pointer to the allocated event buffer structure on success 13672246da4SFelipe Balbi * otherwise ERR_PTR(errno). 13772246da4SFelipe Balbi */ 13867d0b500SFelipe Balbi static struct dwc3_event_buffer *dwc3_alloc_one_event_buffer(struct dwc3 *dwc, 13967d0b500SFelipe Balbi unsigned length) 14072246da4SFelipe Balbi { 14172246da4SFelipe Balbi struct dwc3_event_buffer *evt; 14272246da4SFelipe Balbi 143380f0d28SFelipe Balbi evt = devm_kzalloc(dwc->dev, sizeof(*evt), GFP_KERNEL); 14472246da4SFelipe Balbi if (!evt) 14572246da4SFelipe Balbi return ERR_PTR(-ENOMEM); 14672246da4SFelipe Balbi 14772246da4SFelipe Balbi evt->dwc = dwc; 14872246da4SFelipe Balbi evt->length = length; 14972246da4SFelipe Balbi evt->buf = dma_alloc_coherent(dwc->dev, length, 15072246da4SFelipe Balbi &evt->dma, GFP_KERNEL); 151e32672f0SFelipe Balbi if (!evt->buf) 15272246da4SFelipe Balbi return ERR_PTR(-ENOMEM); 15372246da4SFelipe Balbi 15472246da4SFelipe Balbi return evt; 15572246da4SFelipe Balbi } 15672246da4SFelipe Balbi 15772246da4SFelipe Balbi /** 15872246da4SFelipe Balbi * dwc3_free_event_buffers - frees all allocated event buffers 15972246da4SFelipe Balbi * @dwc: Pointer to our controller context structure 16072246da4SFelipe Balbi */ 16172246da4SFelipe Balbi static void dwc3_free_event_buffers(struct dwc3 *dwc) 16272246da4SFelipe Balbi { 16372246da4SFelipe Balbi struct dwc3_event_buffer *evt; 16472246da4SFelipe Balbi int i; 16572246da4SFelipe Balbi 1669f622b2aSFelipe Balbi for (i = 0; i < dwc->num_event_buffers; i++) { 16772246da4SFelipe Balbi evt = dwc->ev_buffs[i]; 16864b6c8a7SAnton Tikhomirov if (evt) 16972246da4SFelipe Balbi dwc3_free_one_event_buffer(dwc, evt); 17072246da4SFelipe Balbi } 17172246da4SFelipe Balbi } 17272246da4SFelipe Balbi 17372246da4SFelipe Balbi /** 17472246da4SFelipe Balbi * dwc3_alloc_event_buffers - Allocates @num event buffers of size @length 1751d046793SPaul Zimmerman * @dwc: pointer to our controller context structure 17672246da4SFelipe Balbi * @length: size of event buffer 17772246da4SFelipe Balbi * 1781d046793SPaul Zimmerman * Returns 0 on success otherwise negative errno. In the error case, dwc 17972246da4SFelipe Balbi * may contain some buffers allocated but not all which were requested. 18072246da4SFelipe Balbi */ 18141ac7b3aSBill Pemberton static int dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned length) 18272246da4SFelipe Balbi { 1839f622b2aSFelipe Balbi int num; 18472246da4SFelipe Balbi int i; 18572246da4SFelipe Balbi 1869f622b2aSFelipe Balbi num = DWC3_NUM_INT(dwc->hwparams.hwparams1); 1879f622b2aSFelipe Balbi dwc->num_event_buffers = num; 1889f622b2aSFelipe Balbi 189380f0d28SFelipe Balbi dwc->ev_buffs = devm_kzalloc(dwc->dev, sizeof(*dwc->ev_buffs) * num, 190380f0d28SFelipe Balbi GFP_KERNEL); 191734d5a53SJingoo Han if (!dwc->ev_buffs) 192457d3f21SFelipe Balbi return -ENOMEM; 193457d3f21SFelipe Balbi 19472246da4SFelipe Balbi for (i = 0; i < num; i++) { 19572246da4SFelipe Balbi struct dwc3_event_buffer *evt; 19672246da4SFelipe Balbi 19772246da4SFelipe Balbi evt = dwc3_alloc_one_event_buffer(dwc, length); 19872246da4SFelipe Balbi if (IS_ERR(evt)) { 19972246da4SFelipe Balbi dev_err(dwc->dev, "can't allocate event buffer\n"); 20072246da4SFelipe Balbi return PTR_ERR(evt); 20172246da4SFelipe Balbi } 20272246da4SFelipe Balbi dwc->ev_buffs[i] = evt; 20372246da4SFelipe Balbi } 20472246da4SFelipe Balbi 20572246da4SFelipe Balbi return 0; 20672246da4SFelipe Balbi } 20772246da4SFelipe Balbi 20872246da4SFelipe Balbi /** 20972246da4SFelipe Balbi * dwc3_event_buffers_setup - setup our allocated event buffers 2101d046793SPaul Zimmerman * @dwc: pointer to our controller context structure 21172246da4SFelipe Balbi * 21272246da4SFelipe Balbi * Returns 0 on success otherwise negative errno. 21372246da4SFelipe Balbi */ 2147acd85e0SPaul Zimmerman static int dwc3_event_buffers_setup(struct dwc3 *dwc) 21572246da4SFelipe Balbi { 21672246da4SFelipe Balbi struct dwc3_event_buffer *evt; 21772246da4SFelipe Balbi int n; 21872246da4SFelipe Balbi 2199f622b2aSFelipe Balbi for (n = 0; n < dwc->num_event_buffers; n++) { 22072246da4SFelipe Balbi evt = dwc->ev_buffs[n]; 22172246da4SFelipe Balbi dev_dbg(dwc->dev, "Event buf %p dma %08llx length %d\n", 22272246da4SFelipe Balbi evt->buf, (unsigned long long) evt->dma, 22372246da4SFelipe Balbi evt->length); 22472246da4SFelipe Balbi 2257acd85e0SPaul Zimmerman evt->lpos = 0; 2267acd85e0SPaul Zimmerman 22772246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(n), 22872246da4SFelipe Balbi lower_32_bits(evt->dma)); 22972246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(n), 23072246da4SFelipe Balbi upper_32_bits(evt->dma)); 23172246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(n), 23268d6a01bSFelipe Balbi DWC3_GEVNTSIZ_SIZE(evt->length)); 23372246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(n), 0); 23472246da4SFelipe Balbi } 23572246da4SFelipe Balbi 23672246da4SFelipe Balbi return 0; 23772246da4SFelipe Balbi } 23872246da4SFelipe Balbi 23972246da4SFelipe Balbi static void dwc3_event_buffers_cleanup(struct dwc3 *dwc) 24072246da4SFelipe Balbi { 24172246da4SFelipe Balbi struct dwc3_event_buffer *evt; 24272246da4SFelipe Balbi int n; 24372246da4SFelipe Balbi 2449f622b2aSFelipe Balbi for (n = 0; n < dwc->num_event_buffers; n++) { 24572246da4SFelipe Balbi evt = dwc->ev_buffs[n]; 2467acd85e0SPaul Zimmerman 2477acd85e0SPaul Zimmerman evt->lpos = 0; 2487acd85e0SPaul Zimmerman 24972246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(n), 0); 25072246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(n), 0); 25168d6a01bSFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(n), DWC3_GEVNTSIZ_INTMASK 25268d6a01bSFelipe Balbi | DWC3_GEVNTSIZ_SIZE(0)); 25372246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(n), 0); 25472246da4SFelipe Balbi } 25572246da4SFelipe Balbi } 25672246da4SFelipe Balbi 2570ffcaf37SFelipe Balbi static int dwc3_alloc_scratch_buffers(struct dwc3 *dwc) 2580ffcaf37SFelipe Balbi { 2590ffcaf37SFelipe Balbi if (!dwc->has_hibernation) 2600ffcaf37SFelipe Balbi return 0; 2610ffcaf37SFelipe Balbi 2620ffcaf37SFelipe Balbi if (!dwc->nr_scratch) 2630ffcaf37SFelipe Balbi return 0; 2640ffcaf37SFelipe Balbi 2650ffcaf37SFelipe Balbi dwc->scratchbuf = kmalloc_array(dwc->nr_scratch, 2660ffcaf37SFelipe Balbi DWC3_SCRATCHBUF_SIZE, GFP_KERNEL); 2670ffcaf37SFelipe Balbi if (!dwc->scratchbuf) 2680ffcaf37SFelipe Balbi return -ENOMEM; 2690ffcaf37SFelipe Balbi 2700ffcaf37SFelipe Balbi return 0; 2710ffcaf37SFelipe Balbi } 2720ffcaf37SFelipe Balbi 2730ffcaf37SFelipe Balbi static int dwc3_setup_scratch_buffers(struct dwc3 *dwc) 2740ffcaf37SFelipe Balbi { 2750ffcaf37SFelipe Balbi dma_addr_t scratch_addr; 2760ffcaf37SFelipe Balbi u32 param; 2770ffcaf37SFelipe Balbi int ret; 2780ffcaf37SFelipe Balbi 2790ffcaf37SFelipe Balbi if (!dwc->has_hibernation) 2800ffcaf37SFelipe Balbi return 0; 2810ffcaf37SFelipe Balbi 2820ffcaf37SFelipe Balbi if (!dwc->nr_scratch) 2830ffcaf37SFelipe Balbi return 0; 2840ffcaf37SFelipe Balbi 2850ffcaf37SFelipe Balbi /* should never fall here */ 2860ffcaf37SFelipe Balbi if (!WARN_ON(dwc->scratchbuf)) 2870ffcaf37SFelipe Balbi return 0; 2880ffcaf37SFelipe Balbi 2890ffcaf37SFelipe Balbi scratch_addr = dma_map_single(dwc->dev, dwc->scratchbuf, 2900ffcaf37SFelipe Balbi dwc->nr_scratch * DWC3_SCRATCHBUF_SIZE, 2910ffcaf37SFelipe Balbi DMA_BIDIRECTIONAL); 2920ffcaf37SFelipe Balbi if (dma_mapping_error(dwc->dev, scratch_addr)) { 2930ffcaf37SFelipe Balbi dev_err(dwc->dev, "failed to map scratch buffer\n"); 2940ffcaf37SFelipe Balbi ret = -EFAULT; 2950ffcaf37SFelipe Balbi goto err0; 2960ffcaf37SFelipe Balbi } 2970ffcaf37SFelipe Balbi 2980ffcaf37SFelipe Balbi dwc->scratch_addr = scratch_addr; 2990ffcaf37SFelipe Balbi 3000ffcaf37SFelipe Balbi param = lower_32_bits(scratch_addr); 3010ffcaf37SFelipe Balbi 3020ffcaf37SFelipe Balbi ret = dwc3_send_gadget_generic_command(dwc, 3030ffcaf37SFelipe Balbi DWC3_DGCMD_SET_SCRATCHPAD_ADDR_LO, param); 3040ffcaf37SFelipe Balbi if (ret < 0) 3050ffcaf37SFelipe Balbi goto err1; 3060ffcaf37SFelipe Balbi 3070ffcaf37SFelipe Balbi param = upper_32_bits(scratch_addr); 3080ffcaf37SFelipe Balbi 3090ffcaf37SFelipe Balbi ret = dwc3_send_gadget_generic_command(dwc, 3100ffcaf37SFelipe Balbi DWC3_DGCMD_SET_SCRATCHPAD_ADDR_HI, param); 3110ffcaf37SFelipe Balbi if (ret < 0) 3120ffcaf37SFelipe Balbi goto err1; 3130ffcaf37SFelipe Balbi 3140ffcaf37SFelipe Balbi return 0; 3150ffcaf37SFelipe Balbi 3160ffcaf37SFelipe Balbi err1: 3170ffcaf37SFelipe Balbi dma_unmap_single(dwc->dev, dwc->scratch_addr, dwc->nr_scratch * 3180ffcaf37SFelipe Balbi DWC3_SCRATCHBUF_SIZE, DMA_BIDIRECTIONAL); 3190ffcaf37SFelipe Balbi 3200ffcaf37SFelipe Balbi err0: 3210ffcaf37SFelipe Balbi return ret; 3220ffcaf37SFelipe Balbi } 3230ffcaf37SFelipe Balbi 3240ffcaf37SFelipe Balbi static void dwc3_free_scratch_buffers(struct dwc3 *dwc) 3250ffcaf37SFelipe Balbi { 3260ffcaf37SFelipe Balbi if (!dwc->has_hibernation) 3270ffcaf37SFelipe Balbi return; 3280ffcaf37SFelipe Balbi 3290ffcaf37SFelipe Balbi if (!dwc->nr_scratch) 3300ffcaf37SFelipe Balbi return; 3310ffcaf37SFelipe Balbi 3320ffcaf37SFelipe Balbi /* should never fall here */ 3330ffcaf37SFelipe Balbi if (!WARN_ON(dwc->scratchbuf)) 3340ffcaf37SFelipe Balbi return; 3350ffcaf37SFelipe Balbi 3360ffcaf37SFelipe Balbi dma_unmap_single(dwc->dev, dwc->scratch_addr, dwc->nr_scratch * 3370ffcaf37SFelipe Balbi DWC3_SCRATCHBUF_SIZE, DMA_BIDIRECTIONAL); 3380ffcaf37SFelipe Balbi kfree(dwc->scratchbuf); 3390ffcaf37SFelipe Balbi } 3400ffcaf37SFelipe Balbi 341789451f6SFelipe Balbi static void dwc3_core_num_eps(struct dwc3 *dwc) 342789451f6SFelipe Balbi { 343789451f6SFelipe Balbi struct dwc3_hwparams *parms = &dwc->hwparams; 344789451f6SFelipe Balbi 345789451f6SFelipe Balbi dwc->num_in_eps = DWC3_NUM_IN_EPS(parms); 346789451f6SFelipe Balbi dwc->num_out_eps = DWC3_NUM_EPS(parms) - dwc->num_in_eps; 347789451f6SFelipe Balbi 348789451f6SFelipe Balbi dev_vdbg(dwc->dev, "found %d IN and %d OUT endpoints\n", 349789451f6SFelipe Balbi dwc->num_in_eps, dwc->num_out_eps); 350789451f6SFelipe Balbi } 351789451f6SFelipe Balbi 35241ac7b3aSBill Pemberton static void dwc3_cache_hwparams(struct dwc3 *dwc) 35326ceca97SFelipe Balbi { 35426ceca97SFelipe Balbi struct dwc3_hwparams *parms = &dwc->hwparams; 35526ceca97SFelipe Balbi 35626ceca97SFelipe Balbi parms->hwparams0 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS0); 35726ceca97SFelipe Balbi parms->hwparams1 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS1); 35826ceca97SFelipe Balbi parms->hwparams2 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS2); 35926ceca97SFelipe Balbi parms->hwparams3 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS3); 36026ceca97SFelipe Balbi parms->hwparams4 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS4); 36126ceca97SFelipe Balbi parms->hwparams5 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS5); 36226ceca97SFelipe Balbi parms->hwparams6 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS6); 36326ceca97SFelipe Balbi parms->hwparams7 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS7); 36426ceca97SFelipe Balbi parms->hwparams8 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS8); 36526ceca97SFelipe Balbi } 36626ceca97SFelipe Balbi 36772246da4SFelipe Balbi /** 36872246da4SFelipe Balbi * dwc3_core_init - Low-level initialization of DWC3 Core 36972246da4SFelipe Balbi * @dwc: Pointer to our controller context structure 37072246da4SFelipe Balbi * 37172246da4SFelipe Balbi * Returns 0 on success otherwise negative errno. 37272246da4SFelipe Balbi */ 37341ac7b3aSBill Pemberton static int dwc3_core_init(struct dwc3 *dwc) 37472246da4SFelipe Balbi { 37572246da4SFelipe Balbi unsigned long timeout; 3760ffcaf37SFelipe Balbi u32 hwparams4 = dwc->hwparams.hwparams4; 37772246da4SFelipe Balbi u32 reg; 37872246da4SFelipe Balbi int ret; 37972246da4SFelipe Balbi 3807650bd74SSebastian Andrzej Siewior reg = dwc3_readl(dwc->regs, DWC3_GSNPSID); 3817650bd74SSebastian Andrzej Siewior /* This should read as U3 followed by revision number */ 3827650bd74SSebastian Andrzej Siewior if ((reg & DWC3_GSNPSID_MASK) != 0x55330000) { 3837650bd74SSebastian Andrzej Siewior dev_err(dwc->dev, "this is not a DesignWare USB3 DRD Core\n"); 3847650bd74SSebastian Andrzej Siewior ret = -ENODEV; 3857650bd74SSebastian Andrzej Siewior goto err0; 3867650bd74SSebastian Andrzej Siewior } 387248b122bSFelipe Balbi dwc->revision = reg; 3887650bd74SSebastian Andrzej Siewior 389fa0ea13eSFelipe Balbi /* 390fa0ea13eSFelipe Balbi * Write Linux Version Code to our GUID register so it's easy to figure 391fa0ea13eSFelipe Balbi * out which kernel version a bug was found. 392fa0ea13eSFelipe Balbi */ 393fa0ea13eSFelipe Balbi dwc3_writel(dwc->regs, DWC3_GUID, LINUX_VERSION_CODE); 394fa0ea13eSFelipe Balbi 3950e1e5c47SPaul Zimmerman /* Handle USB2.0-only core configuration */ 3960e1e5c47SPaul Zimmerman if (DWC3_GHWPARAMS3_SSPHY_IFC(dwc->hwparams.hwparams3) == 3970e1e5c47SPaul Zimmerman DWC3_GHWPARAMS3_SSPHY_IFC_DIS) { 3980e1e5c47SPaul Zimmerman if (dwc->maximum_speed == USB_SPEED_SUPER) 3990e1e5c47SPaul Zimmerman dwc->maximum_speed = USB_SPEED_HIGH; 4000e1e5c47SPaul Zimmerman } 4010e1e5c47SPaul Zimmerman 40272246da4SFelipe Balbi /* issue device SoftReset too */ 40372246da4SFelipe Balbi timeout = jiffies + msecs_to_jiffies(500); 40472246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, DWC3_DCTL_CSFTRST); 40572246da4SFelipe Balbi do { 40672246da4SFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 40772246da4SFelipe Balbi if (!(reg & DWC3_DCTL_CSFTRST)) 40872246da4SFelipe Balbi break; 40972246da4SFelipe Balbi 41072246da4SFelipe Balbi if (time_after(jiffies, timeout)) { 41172246da4SFelipe Balbi dev_err(dwc->dev, "Reset Timed Out\n"); 41272246da4SFelipe Balbi ret = -ETIMEDOUT; 41372246da4SFelipe Balbi goto err0; 41472246da4SFelipe Balbi } 41572246da4SFelipe Balbi 41672246da4SFelipe Balbi cpu_relax(); 41772246da4SFelipe Balbi } while (true); 41872246da4SFelipe Balbi 41957303488SKishon Vijay Abraham I ret = dwc3_core_soft_reset(dwc); 42057303488SKishon Vijay Abraham I if (ret) 42157303488SKishon Vijay Abraham I goto err0; 42258a0f23fSPratyush Anand 4234878a028SSebastian Andrzej Siewior reg = dwc3_readl(dwc->regs, DWC3_GCTL); 4243e87c42aSPaul Zimmerman reg &= ~DWC3_GCTL_SCALEDOWN_MASK; 4254878a028SSebastian Andrzej Siewior 426164d7731SSebastian Andrzej Siewior switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams1)) { 4274878a028SSebastian Andrzej Siewior case DWC3_GHWPARAMS1_EN_PWROPT_CLK: 42832a4a135SFelipe Balbi /** 42932a4a135SFelipe Balbi * WORKAROUND: DWC3 revisions between 2.10a and 2.50a have an 43032a4a135SFelipe Balbi * issue which would cause xHCI compliance tests to fail. 43132a4a135SFelipe Balbi * 43232a4a135SFelipe Balbi * Because of that we cannot enable clock gating on such 43332a4a135SFelipe Balbi * configurations. 43432a4a135SFelipe Balbi * 43532a4a135SFelipe Balbi * Refers to: 43632a4a135SFelipe Balbi * 43732a4a135SFelipe Balbi * STAR#9000588375: Clock Gating, SOF Issues when ref_clk-Based 43832a4a135SFelipe Balbi * SOF/ITP Mode Used 43932a4a135SFelipe Balbi */ 44032a4a135SFelipe Balbi if ((dwc->dr_mode == USB_DR_MODE_HOST || 44132a4a135SFelipe Balbi dwc->dr_mode == USB_DR_MODE_OTG) && 44232a4a135SFelipe Balbi (dwc->revision >= DWC3_REVISION_210A && 44332a4a135SFelipe Balbi dwc->revision <= DWC3_REVISION_250A)) 44432a4a135SFelipe Balbi reg |= DWC3_GCTL_DSBLCLKGTNG | DWC3_GCTL_SOFITPSYNC; 44532a4a135SFelipe Balbi else 4464878a028SSebastian Andrzej Siewior reg &= ~DWC3_GCTL_DSBLCLKGTNG; 4474878a028SSebastian Andrzej Siewior break; 4480ffcaf37SFelipe Balbi case DWC3_GHWPARAMS1_EN_PWROPT_HIB: 4490ffcaf37SFelipe Balbi /* enable hibernation here */ 4500ffcaf37SFelipe Balbi dwc->nr_scratch = DWC3_GHWPARAMS4_HIBER_SCRATCHBUFS(hwparams4); 4512eac3992SHuang Rui 4522eac3992SHuang Rui /* 4532eac3992SHuang Rui * REVISIT Enabling this bit so that host-mode hibernation 4542eac3992SHuang Rui * will work. Device-mode hibernation is not yet implemented. 4552eac3992SHuang Rui */ 4562eac3992SHuang Rui reg |= DWC3_GCTL_GBLHIBERNATIONEN; 4570ffcaf37SFelipe Balbi break; 4584878a028SSebastian Andrzej Siewior default: 4594878a028SSebastian Andrzej Siewior dev_dbg(dwc->dev, "No power optimization available\n"); 4604878a028SSebastian Andrzej Siewior } 4614878a028SSebastian Andrzej Siewior 462946bd579SHuang Rui /* check if current dwc3 is on simulation board */ 463946bd579SHuang Rui if (dwc->hwparams.hwparams6 & DWC3_GHWPARAMS6_EN_FPGA) { 464946bd579SHuang Rui dev_dbg(dwc->dev, "it is on FPGA board\n"); 465946bd579SHuang Rui dwc->is_fpga = true; 466946bd579SHuang Rui } 467946bd579SHuang Rui 4683b81221aSHuang Rui WARN_ONCE(dwc->disable_scramble_quirk && !dwc->is_fpga, 4693b81221aSHuang Rui "disable_scramble cannot be used on non-FPGA builds\n"); 4703b81221aSHuang Rui 4713b81221aSHuang Rui if (dwc->disable_scramble_quirk && dwc->is_fpga) 4723b81221aSHuang Rui reg |= DWC3_GCTL_DISSCRAMBLE; 4733b81221aSHuang Rui else 4743b81221aSHuang Rui reg &= ~DWC3_GCTL_DISSCRAMBLE; 4753b81221aSHuang Rui 4764878a028SSebastian Andrzej Siewior /* 4774878a028SSebastian Andrzej Siewior * WORKAROUND: DWC3 revisions <1.90a have a bug 4781d046793SPaul Zimmerman * where the device can fail to connect at SuperSpeed 4794878a028SSebastian Andrzej Siewior * and falls back to high-speed mode which causes 4801d046793SPaul Zimmerman * the device to enter a Connect/Disconnect loop 4814878a028SSebastian Andrzej Siewior */ 4824878a028SSebastian Andrzej Siewior if (dwc->revision < DWC3_REVISION_190A) 4834878a028SSebastian Andrzej Siewior reg |= DWC3_GCTL_U2RSTECN; 4844878a028SSebastian Andrzej Siewior 485789451f6SFelipe Balbi dwc3_core_num_eps(dwc); 486789451f6SFelipe Balbi 4874878a028SSebastian Andrzej Siewior dwc3_writel(dwc->regs, DWC3_GCTL, reg); 4884878a028SSebastian Andrzej Siewior 4890ffcaf37SFelipe Balbi ret = dwc3_alloc_scratch_buffers(dwc); 4900ffcaf37SFelipe Balbi if (ret) 4910ffcaf37SFelipe Balbi goto err1; 4920ffcaf37SFelipe Balbi 4930ffcaf37SFelipe Balbi ret = dwc3_setup_scratch_buffers(dwc); 4940ffcaf37SFelipe Balbi if (ret) 4950ffcaf37SFelipe Balbi goto err2; 4960ffcaf37SFelipe Balbi 49772246da4SFelipe Balbi return 0; 49872246da4SFelipe Balbi 4990ffcaf37SFelipe Balbi err2: 5000ffcaf37SFelipe Balbi dwc3_free_scratch_buffers(dwc); 5010ffcaf37SFelipe Balbi 5020ffcaf37SFelipe Balbi err1: 5030ffcaf37SFelipe Balbi usb_phy_shutdown(dwc->usb2_phy); 5040ffcaf37SFelipe Balbi usb_phy_shutdown(dwc->usb3_phy); 50557303488SKishon Vijay Abraham I phy_exit(dwc->usb2_generic_phy); 50657303488SKishon Vijay Abraham I phy_exit(dwc->usb3_generic_phy); 5070ffcaf37SFelipe Balbi 50872246da4SFelipe Balbi err0: 50972246da4SFelipe Balbi return ret; 51072246da4SFelipe Balbi } 51172246da4SFelipe Balbi 51272246da4SFelipe Balbi static void dwc3_core_exit(struct dwc3 *dwc) 51372246da4SFelipe Balbi { 5140ffcaf37SFelipe Balbi dwc3_free_scratch_buffers(dwc); 51501b8daf7SVivek Gautam usb_phy_shutdown(dwc->usb2_phy); 51601b8daf7SVivek Gautam usb_phy_shutdown(dwc->usb3_phy); 51757303488SKishon Vijay Abraham I phy_exit(dwc->usb2_generic_phy); 51857303488SKishon Vijay Abraham I phy_exit(dwc->usb3_generic_phy); 51972246da4SFelipe Balbi } 52072246da4SFelipe Balbi 5213c9f94acSFelipe Balbi static int dwc3_core_get_phy(struct dwc3 *dwc) 52272246da4SFelipe Balbi { 5233c9f94acSFelipe Balbi struct device *dev = dwc->dev; 524941ea361SFelipe Balbi struct device_node *node = dev->of_node; 5253c9f94acSFelipe Balbi int ret; 52672246da4SFelipe Balbi 5275088b6f5SKishon Vijay Abraham I if (node) { 5285088b6f5SKishon Vijay Abraham I dwc->usb2_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 0); 5295088b6f5SKishon Vijay Abraham I dwc->usb3_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 1); 530bb674907SFelipe Balbi } else { 531bb674907SFelipe Balbi dwc->usb2_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2); 532bb674907SFelipe Balbi dwc->usb3_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB3); 5335088b6f5SKishon Vijay Abraham I } 5345088b6f5SKishon Vijay Abraham I 535d105e7f8SFelipe Balbi if (IS_ERR(dwc->usb2_phy)) { 536d105e7f8SFelipe Balbi ret = PTR_ERR(dwc->usb2_phy); 537122f06e6SKishon Vijay Abraham I if (ret == -ENXIO || ret == -ENODEV) { 538122f06e6SKishon Vijay Abraham I dwc->usb2_phy = NULL; 539122f06e6SKishon Vijay Abraham I } else if (ret == -EPROBE_DEFER) { 540d105e7f8SFelipe Balbi return ret; 541122f06e6SKishon Vijay Abraham I } else { 54251e1e7bcSFelipe Balbi dev_err(dev, "no usb2 phy configured\n"); 543122f06e6SKishon Vijay Abraham I return ret; 544122f06e6SKishon Vijay Abraham I } 54551e1e7bcSFelipe Balbi } 54651e1e7bcSFelipe Balbi 547d105e7f8SFelipe Balbi if (IS_ERR(dwc->usb3_phy)) { 548315955d7SRuchika Kharwar ret = PTR_ERR(dwc->usb3_phy); 549122f06e6SKishon Vijay Abraham I if (ret == -ENXIO || ret == -ENODEV) { 550122f06e6SKishon Vijay Abraham I dwc->usb3_phy = NULL; 551122f06e6SKishon Vijay Abraham I } else if (ret == -EPROBE_DEFER) { 552d105e7f8SFelipe Balbi return ret; 553122f06e6SKishon Vijay Abraham I } else { 55451e1e7bcSFelipe Balbi dev_err(dev, "no usb3 phy configured\n"); 555122f06e6SKishon Vijay Abraham I return ret; 556122f06e6SKishon Vijay Abraham I } 55751e1e7bcSFelipe Balbi } 55851e1e7bcSFelipe Balbi 55957303488SKishon Vijay Abraham I dwc->usb2_generic_phy = devm_phy_get(dev, "usb2-phy"); 56057303488SKishon Vijay Abraham I if (IS_ERR(dwc->usb2_generic_phy)) { 56157303488SKishon Vijay Abraham I ret = PTR_ERR(dwc->usb2_generic_phy); 56257303488SKishon Vijay Abraham I if (ret == -ENOSYS || ret == -ENODEV) { 56357303488SKishon Vijay Abraham I dwc->usb2_generic_phy = NULL; 56457303488SKishon Vijay Abraham I } else if (ret == -EPROBE_DEFER) { 56557303488SKishon Vijay Abraham I return ret; 56657303488SKishon Vijay Abraham I } else { 56757303488SKishon Vijay Abraham I dev_err(dev, "no usb2 phy configured\n"); 56857303488SKishon Vijay Abraham I return ret; 56957303488SKishon Vijay Abraham I } 57057303488SKishon Vijay Abraham I } 57157303488SKishon Vijay Abraham I 57257303488SKishon Vijay Abraham I dwc->usb3_generic_phy = devm_phy_get(dev, "usb3-phy"); 57357303488SKishon Vijay Abraham I if (IS_ERR(dwc->usb3_generic_phy)) { 57457303488SKishon Vijay Abraham I ret = PTR_ERR(dwc->usb3_generic_phy); 57557303488SKishon Vijay Abraham I if (ret == -ENOSYS || ret == -ENODEV) { 57657303488SKishon Vijay Abraham I dwc->usb3_generic_phy = NULL; 57757303488SKishon Vijay Abraham I } else if (ret == -EPROBE_DEFER) { 57857303488SKishon Vijay Abraham I return ret; 57957303488SKishon Vijay Abraham I } else { 58057303488SKishon Vijay Abraham I dev_err(dev, "no usb3 phy configured\n"); 58157303488SKishon Vijay Abraham I return ret; 58257303488SKishon Vijay Abraham I } 58357303488SKishon Vijay Abraham I } 58457303488SKishon Vijay Abraham I 5853c9f94acSFelipe Balbi return 0; 5863c9f94acSFelipe Balbi } 5873c9f94acSFelipe Balbi 5885f94adfeSFelipe Balbi static int dwc3_core_init_mode(struct dwc3 *dwc) 5895f94adfeSFelipe Balbi { 5905f94adfeSFelipe Balbi struct device *dev = dwc->dev; 5915f94adfeSFelipe Balbi int ret; 5925f94adfeSFelipe Balbi 5935f94adfeSFelipe Balbi switch (dwc->dr_mode) { 5945f94adfeSFelipe Balbi case USB_DR_MODE_PERIPHERAL: 5955f94adfeSFelipe Balbi dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE); 5965f94adfeSFelipe Balbi ret = dwc3_gadget_init(dwc); 5975f94adfeSFelipe Balbi if (ret) { 5985f94adfeSFelipe Balbi dev_err(dev, "failed to initialize gadget\n"); 5995f94adfeSFelipe Balbi return ret; 6005f94adfeSFelipe Balbi } 6015f94adfeSFelipe Balbi break; 6025f94adfeSFelipe Balbi case USB_DR_MODE_HOST: 6035f94adfeSFelipe Balbi dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_HOST); 6045f94adfeSFelipe Balbi ret = dwc3_host_init(dwc); 6055f94adfeSFelipe Balbi if (ret) { 6065f94adfeSFelipe Balbi dev_err(dev, "failed to initialize host\n"); 6075f94adfeSFelipe Balbi return ret; 6085f94adfeSFelipe Balbi } 6095f94adfeSFelipe Balbi break; 6105f94adfeSFelipe Balbi case USB_DR_MODE_OTG: 6115f94adfeSFelipe Balbi dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_OTG); 6125f94adfeSFelipe Balbi ret = dwc3_host_init(dwc); 6135f94adfeSFelipe Balbi if (ret) { 6145f94adfeSFelipe Balbi dev_err(dev, "failed to initialize host\n"); 6155f94adfeSFelipe Balbi return ret; 6165f94adfeSFelipe Balbi } 6175f94adfeSFelipe Balbi 6185f94adfeSFelipe Balbi ret = dwc3_gadget_init(dwc); 6195f94adfeSFelipe Balbi if (ret) { 6205f94adfeSFelipe Balbi dev_err(dev, "failed to initialize gadget\n"); 6215f94adfeSFelipe Balbi return ret; 6225f94adfeSFelipe Balbi } 6235f94adfeSFelipe Balbi break; 6245f94adfeSFelipe Balbi default: 6255f94adfeSFelipe Balbi dev_err(dev, "Unsupported mode of operation %d\n", dwc->dr_mode); 6265f94adfeSFelipe Balbi return -EINVAL; 6275f94adfeSFelipe Balbi } 6285f94adfeSFelipe Balbi 6295f94adfeSFelipe Balbi return 0; 6305f94adfeSFelipe Balbi } 6315f94adfeSFelipe Balbi 6325f94adfeSFelipe Balbi static void dwc3_core_exit_mode(struct dwc3 *dwc) 6335f94adfeSFelipe Balbi { 6345f94adfeSFelipe Balbi switch (dwc->dr_mode) { 6355f94adfeSFelipe Balbi case USB_DR_MODE_PERIPHERAL: 6365f94adfeSFelipe Balbi dwc3_gadget_exit(dwc); 6375f94adfeSFelipe Balbi break; 6385f94adfeSFelipe Balbi case USB_DR_MODE_HOST: 6395f94adfeSFelipe Balbi dwc3_host_exit(dwc); 6405f94adfeSFelipe Balbi break; 6415f94adfeSFelipe Balbi case USB_DR_MODE_OTG: 6425f94adfeSFelipe Balbi dwc3_host_exit(dwc); 6435f94adfeSFelipe Balbi dwc3_gadget_exit(dwc); 6445f94adfeSFelipe Balbi break; 6455f94adfeSFelipe Balbi default: 6465f94adfeSFelipe Balbi /* do nothing */ 6475f94adfeSFelipe Balbi break; 6485f94adfeSFelipe Balbi } 6495f94adfeSFelipe Balbi } 6505f94adfeSFelipe Balbi 6513c9f94acSFelipe Balbi #define DWC3_ALIGN_MASK (16 - 1) 6523c9f94acSFelipe Balbi 6533c9f94acSFelipe Balbi static int dwc3_probe(struct platform_device *pdev) 6543c9f94acSFelipe Balbi { 6553c9f94acSFelipe Balbi struct device *dev = &pdev->dev; 6563c9f94acSFelipe Balbi struct dwc3_platform_data *pdata = dev_get_platdata(dev); 6573c9f94acSFelipe Balbi struct device_node *node = dev->of_node; 6583c9f94acSFelipe Balbi struct resource *res; 6593c9f94acSFelipe Balbi struct dwc3 *dwc; 6603c9f94acSFelipe Balbi 661b09e99eeSAndy Shevchenko int ret; 6623c9f94acSFelipe Balbi 6633c9f94acSFelipe Balbi void __iomem *regs; 6643c9f94acSFelipe Balbi void *mem; 6653c9f94acSFelipe Balbi 6663c9f94acSFelipe Balbi mem = devm_kzalloc(dev, sizeof(*dwc) + DWC3_ALIGN_MASK, GFP_KERNEL); 667734d5a53SJingoo Han if (!mem) 6683c9f94acSFelipe Balbi return -ENOMEM; 669734d5a53SJingoo Han 6703c9f94acSFelipe Balbi dwc = PTR_ALIGN(mem, DWC3_ALIGN_MASK + 1); 6713c9f94acSFelipe Balbi dwc->mem = mem; 6723c9f94acSFelipe Balbi dwc->dev = dev; 6733c9f94acSFelipe Balbi 6743c9f94acSFelipe Balbi res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 6753c9f94acSFelipe Balbi if (!res) { 6763c9f94acSFelipe Balbi dev_err(dev, "missing IRQ\n"); 6773c9f94acSFelipe Balbi return -ENODEV; 6783c9f94acSFelipe Balbi } 6793c9f94acSFelipe Balbi dwc->xhci_resources[1].start = res->start; 6803c9f94acSFelipe Balbi dwc->xhci_resources[1].end = res->end; 6813c9f94acSFelipe Balbi dwc->xhci_resources[1].flags = res->flags; 6823c9f94acSFelipe Balbi dwc->xhci_resources[1].name = res->name; 6833c9f94acSFelipe Balbi 6843c9f94acSFelipe Balbi res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 6853c9f94acSFelipe Balbi if (!res) { 6863c9f94acSFelipe Balbi dev_err(dev, "missing memory resource\n"); 6873c9f94acSFelipe Balbi return -ENODEV; 6883c9f94acSFelipe Balbi } 6893c9f94acSFelipe Balbi 690f32a5e23SVivek Gautam dwc->xhci_resources[0].start = res->start; 691f32a5e23SVivek Gautam dwc->xhci_resources[0].end = dwc->xhci_resources[0].start + 692f32a5e23SVivek Gautam DWC3_XHCI_REGS_END; 693f32a5e23SVivek Gautam dwc->xhci_resources[0].flags = res->flags; 694f32a5e23SVivek Gautam dwc->xhci_resources[0].name = res->name; 695f32a5e23SVivek Gautam 696f32a5e23SVivek Gautam res->start += DWC3_GLOBALS_REGS_START; 697f32a5e23SVivek Gautam 698f32a5e23SVivek Gautam /* 699f32a5e23SVivek Gautam * Request memory region but exclude xHCI regs, 700f32a5e23SVivek Gautam * since it will be requested by the xhci-plat driver. 701f32a5e23SVivek Gautam */ 702f32a5e23SVivek Gautam regs = devm_ioremap_resource(dev, res); 703f32a5e23SVivek Gautam if (IS_ERR(regs)) 704f32a5e23SVivek Gautam return PTR_ERR(regs); 705f32a5e23SVivek Gautam 706f32a5e23SVivek Gautam dwc->regs = regs; 707f32a5e23SVivek Gautam dwc->regs_size = resource_size(res); 708f32a5e23SVivek Gautam /* 709f32a5e23SVivek Gautam * restore res->start back to its original value so that, 710f32a5e23SVivek Gautam * in case the probe is deferred, we don't end up getting error in 711f32a5e23SVivek Gautam * request the memory region the next time probe is called. 712f32a5e23SVivek Gautam */ 713f32a5e23SVivek Gautam res->start -= DWC3_GLOBALS_REGS_START; 714f32a5e23SVivek Gautam 7153c9f94acSFelipe Balbi if (node) { 7163c9f94acSFelipe Balbi dwc->maximum_speed = of_usb_get_maximum_speed(node); 7173c9f94acSFelipe Balbi 7183c9f94acSFelipe Balbi dwc->needs_fifo_resize = of_property_read_bool(node, "tx-fifo-resize"); 7193c9f94acSFelipe Balbi dwc->dr_mode = of_usb_get_dr_mode(node); 7203b81221aSHuang Rui 7213b81221aSHuang Rui dwc->disable_scramble_quirk = of_property_read_bool(node, 7223b81221aSHuang Rui "snps,disable_scramble_quirk"); 7233c9f94acSFelipe Balbi } else if (pdata) { 7243c9f94acSFelipe Balbi dwc->maximum_speed = pdata->maximum_speed; 7253c9f94acSFelipe Balbi 7263c9f94acSFelipe Balbi dwc->needs_fifo_resize = pdata->tx_fifo_resize; 7273c9f94acSFelipe Balbi dwc->dr_mode = pdata->dr_mode; 7283b81221aSHuang Rui 7293b81221aSHuang Rui dwc->disable_scramble_quirk = pdata->disable_scramble_quirk; 7303c9f94acSFelipe Balbi } 7313c9f94acSFelipe Balbi 7323c9f94acSFelipe Balbi /* default to superspeed if no maximum_speed passed */ 7333c9f94acSFelipe Balbi if (dwc->maximum_speed == USB_SPEED_UNKNOWN) 7343c9f94acSFelipe Balbi dwc->maximum_speed = USB_SPEED_SUPER; 7353c9f94acSFelipe Balbi 7363c9f94acSFelipe Balbi ret = dwc3_core_get_phy(dwc); 7373c9f94acSFelipe Balbi if (ret) 7383c9f94acSFelipe Balbi return ret; 7393c9f94acSFelipe Balbi 74072246da4SFelipe Balbi spin_lock_init(&dwc->lock); 74172246da4SFelipe Balbi platform_set_drvdata(pdev, dwc); 74272246da4SFelipe Balbi 74319bacdc9SHeikki Krogerus if (!dev->dma_mask) { 744ddff14f1SKishon Vijay Abraham I dev->dma_mask = dev->parent->dma_mask; 745ddff14f1SKishon Vijay Abraham I dev->dma_parms = dev->parent->dma_parms; 746ddff14f1SKishon Vijay Abraham I dma_set_coherent_mask(dev, dev->parent->coherent_dma_mask); 74719bacdc9SHeikki Krogerus } 748ddff14f1SKishon Vijay Abraham I 749802ca850SChanho Park pm_runtime_enable(dev); 750802ca850SChanho Park pm_runtime_get_sync(dev); 751802ca850SChanho Park pm_runtime_forbid(dev); 75272246da4SFelipe Balbi 7534fd24483SKishon Vijay Abraham I dwc3_cache_hwparams(dwc); 7544fd24483SKishon Vijay Abraham I 7553921426bSFelipe Balbi ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE); 7563921426bSFelipe Balbi if (ret) { 7573921426bSFelipe Balbi dev_err(dwc->dev, "failed to allocate event buffers\n"); 7583921426bSFelipe Balbi ret = -ENOMEM; 7593921426bSFelipe Balbi goto err0; 7603921426bSFelipe Balbi } 7613921426bSFelipe Balbi 76232a4a135SFelipe Balbi if (IS_ENABLED(CONFIG_USB_DWC3_HOST)) 76332a4a135SFelipe Balbi dwc->dr_mode = USB_DR_MODE_HOST; 76432a4a135SFelipe Balbi else if (IS_ENABLED(CONFIG_USB_DWC3_GADGET)) 76532a4a135SFelipe Balbi dwc->dr_mode = USB_DR_MODE_PERIPHERAL; 76632a4a135SFelipe Balbi 76732a4a135SFelipe Balbi if (dwc->dr_mode == USB_DR_MODE_UNKNOWN) 76832a4a135SFelipe Balbi dwc->dr_mode = USB_DR_MODE_OTG; 76932a4a135SFelipe Balbi 77072246da4SFelipe Balbi ret = dwc3_core_init(dwc); 77172246da4SFelipe Balbi if (ret) { 772802ca850SChanho Park dev_err(dev, "failed to initialize core\n"); 7733921426bSFelipe Balbi goto err0; 77472246da4SFelipe Balbi } 77572246da4SFelipe Balbi 7763088f108SKishon Vijay Abraham I usb_phy_set_suspend(dwc->usb2_phy, 0); 7773088f108SKishon Vijay Abraham I usb_phy_set_suspend(dwc->usb3_phy, 0); 77857303488SKishon Vijay Abraham I ret = phy_power_on(dwc->usb2_generic_phy); 77957303488SKishon Vijay Abraham I if (ret < 0) 78057303488SKishon Vijay Abraham I goto err1; 78157303488SKishon Vijay Abraham I 78257303488SKishon Vijay Abraham I ret = phy_power_on(dwc->usb3_generic_phy); 78357303488SKishon Vijay Abraham I if (ret < 0) 78457303488SKishon Vijay Abraham I goto err_usb2phy_power; 7853088f108SKishon Vijay Abraham I 786f122d33eSFelipe Balbi ret = dwc3_event_buffers_setup(dwc); 787f122d33eSFelipe Balbi if (ret) { 788f122d33eSFelipe Balbi dev_err(dwc->dev, "failed to setup event buffers\n"); 78957303488SKishon Vijay Abraham I goto err_usb3phy_power; 790f122d33eSFelipe Balbi } 791f122d33eSFelipe Balbi 7925f94adfeSFelipe Balbi ret = dwc3_core_init_mode(dwc); 7935f94adfeSFelipe Balbi if (ret) 794f122d33eSFelipe Balbi goto err2; 79572246da4SFelipe Balbi 79672246da4SFelipe Balbi ret = dwc3_debugfs_init(dwc); 79772246da4SFelipe Balbi if (ret) { 798802ca850SChanho Park dev_err(dev, "failed to initialize debugfs\n"); 799f122d33eSFelipe Balbi goto err3; 80072246da4SFelipe Balbi } 80172246da4SFelipe Balbi 802802ca850SChanho Park pm_runtime_allow(dev); 80372246da4SFelipe Balbi 80472246da4SFelipe Balbi return 0; 80572246da4SFelipe Balbi 806f122d33eSFelipe Balbi err3: 8075f94adfeSFelipe Balbi dwc3_core_exit_mode(dwc); 80872246da4SFelipe Balbi 809f122d33eSFelipe Balbi err2: 810f122d33eSFelipe Balbi dwc3_event_buffers_cleanup(dwc); 811f122d33eSFelipe Balbi 81257303488SKishon Vijay Abraham I err_usb3phy_power: 81357303488SKishon Vijay Abraham I phy_power_off(dwc->usb3_generic_phy); 81457303488SKishon Vijay Abraham I 81557303488SKishon Vijay Abraham I err_usb2phy_power: 81657303488SKishon Vijay Abraham I phy_power_off(dwc->usb2_generic_phy); 81757303488SKishon Vijay Abraham I 818802ca850SChanho Park err1: 819501fae51SKishon Vijay Abraham I usb_phy_set_suspend(dwc->usb2_phy, 1); 820501fae51SKishon Vijay Abraham I usb_phy_set_suspend(dwc->usb3_phy, 1); 82172246da4SFelipe Balbi dwc3_core_exit(dwc); 82272246da4SFelipe Balbi 8233921426bSFelipe Balbi err0: 8243921426bSFelipe Balbi dwc3_free_event_buffers(dwc); 8253921426bSFelipe Balbi 82672246da4SFelipe Balbi return ret; 82772246da4SFelipe Balbi } 82872246da4SFelipe Balbi 829fb4e98abSBill Pemberton static int dwc3_remove(struct platform_device *pdev) 83072246da4SFelipe Balbi { 83172246da4SFelipe Balbi struct dwc3 *dwc = platform_get_drvdata(pdev); 83272246da4SFelipe Balbi 833dc99f16fSFelipe Balbi dwc3_debugfs_exit(dwc); 834dc99f16fSFelipe Balbi dwc3_core_exit_mode(dwc); 835dc99f16fSFelipe Balbi dwc3_event_buffers_cleanup(dwc); 836dc99f16fSFelipe Balbi dwc3_free_event_buffers(dwc); 837dc99f16fSFelipe Balbi 8388ba007a9SKishon Vijay Abraham I usb_phy_set_suspend(dwc->usb2_phy, 1); 8398ba007a9SKishon Vijay Abraham I usb_phy_set_suspend(dwc->usb3_phy, 1); 84057303488SKishon Vijay Abraham I phy_power_off(dwc->usb2_generic_phy); 84157303488SKishon Vijay Abraham I phy_power_off(dwc->usb3_generic_phy); 8428ba007a9SKishon Vijay Abraham I 84372246da4SFelipe Balbi dwc3_core_exit(dwc); 84472246da4SFelipe Balbi 8457415f17cSFelipe Balbi pm_runtime_put_sync(&pdev->dev); 8467415f17cSFelipe Balbi pm_runtime_disable(&pdev->dev); 8477415f17cSFelipe Balbi 84872246da4SFelipe Balbi return 0; 84972246da4SFelipe Balbi } 85072246da4SFelipe Balbi 8517415f17cSFelipe Balbi #ifdef CONFIG_PM_SLEEP 8527415f17cSFelipe Balbi static int dwc3_suspend(struct device *dev) 8537415f17cSFelipe Balbi { 8547415f17cSFelipe Balbi struct dwc3 *dwc = dev_get_drvdata(dev); 8557415f17cSFelipe Balbi unsigned long flags; 8567415f17cSFelipe Balbi 8577415f17cSFelipe Balbi spin_lock_irqsave(&dwc->lock, flags); 8587415f17cSFelipe Balbi 859a45c82b8SRuchika Kharwar switch (dwc->dr_mode) { 860a45c82b8SRuchika Kharwar case USB_DR_MODE_PERIPHERAL: 861a45c82b8SRuchika Kharwar case USB_DR_MODE_OTG: 8627415f17cSFelipe Balbi dwc3_gadget_suspend(dwc); 8637415f17cSFelipe Balbi /* FALLTHROUGH */ 864a45c82b8SRuchika Kharwar case USB_DR_MODE_HOST: 8657415f17cSFelipe Balbi default: 8660b0231aaSFelipe Balbi dwc3_event_buffers_cleanup(dwc); 8677415f17cSFelipe Balbi break; 8687415f17cSFelipe Balbi } 8697415f17cSFelipe Balbi 8707415f17cSFelipe Balbi dwc->gctl = dwc3_readl(dwc->regs, DWC3_GCTL); 8717415f17cSFelipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 8727415f17cSFelipe Balbi 8737415f17cSFelipe Balbi usb_phy_shutdown(dwc->usb3_phy); 8747415f17cSFelipe Balbi usb_phy_shutdown(dwc->usb2_phy); 87557303488SKishon Vijay Abraham I phy_exit(dwc->usb2_generic_phy); 87657303488SKishon Vijay Abraham I phy_exit(dwc->usb3_generic_phy); 8777415f17cSFelipe Balbi 8787415f17cSFelipe Balbi return 0; 8797415f17cSFelipe Balbi } 8807415f17cSFelipe Balbi 8817415f17cSFelipe Balbi static int dwc3_resume(struct device *dev) 8827415f17cSFelipe Balbi { 8837415f17cSFelipe Balbi struct dwc3 *dwc = dev_get_drvdata(dev); 8847415f17cSFelipe Balbi unsigned long flags; 88557303488SKishon Vijay Abraham I int ret; 8867415f17cSFelipe Balbi 8877415f17cSFelipe Balbi usb_phy_init(dwc->usb3_phy); 8887415f17cSFelipe Balbi usb_phy_init(dwc->usb2_phy); 88957303488SKishon Vijay Abraham I ret = phy_init(dwc->usb2_generic_phy); 89057303488SKishon Vijay Abraham I if (ret < 0) 89157303488SKishon Vijay Abraham I return ret; 89257303488SKishon Vijay Abraham I 89357303488SKishon Vijay Abraham I ret = phy_init(dwc->usb3_generic_phy); 89457303488SKishon Vijay Abraham I if (ret < 0) 89557303488SKishon Vijay Abraham I goto err_usb2phy_init; 8967415f17cSFelipe Balbi 8977415f17cSFelipe Balbi spin_lock_irqsave(&dwc->lock, flags); 8987415f17cSFelipe Balbi 8990b0231aaSFelipe Balbi dwc3_event_buffers_setup(dwc); 9007415f17cSFelipe Balbi dwc3_writel(dwc->regs, DWC3_GCTL, dwc->gctl); 9017415f17cSFelipe Balbi 902a45c82b8SRuchika Kharwar switch (dwc->dr_mode) { 903a45c82b8SRuchika Kharwar case USB_DR_MODE_PERIPHERAL: 904a45c82b8SRuchika Kharwar case USB_DR_MODE_OTG: 9057415f17cSFelipe Balbi dwc3_gadget_resume(dwc); 9067415f17cSFelipe Balbi /* FALLTHROUGH */ 907a45c82b8SRuchika Kharwar case USB_DR_MODE_HOST: 9087415f17cSFelipe Balbi default: 9097415f17cSFelipe Balbi /* do nothing */ 9107415f17cSFelipe Balbi break; 9117415f17cSFelipe Balbi } 9127415f17cSFelipe Balbi 9137415f17cSFelipe Balbi spin_unlock_irqrestore(&dwc->lock, flags); 9147415f17cSFelipe Balbi 9157415f17cSFelipe Balbi pm_runtime_disable(dev); 9167415f17cSFelipe Balbi pm_runtime_set_active(dev); 9177415f17cSFelipe Balbi pm_runtime_enable(dev); 9187415f17cSFelipe Balbi 9197415f17cSFelipe Balbi return 0; 92057303488SKishon Vijay Abraham I 92157303488SKishon Vijay Abraham I err_usb2phy_init: 92257303488SKishon Vijay Abraham I phy_exit(dwc->usb2_generic_phy); 92357303488SKishon Vijay Abraham I 92457303488SKishon Vijay Abraham I return ret; 9257415f17cSFelipe Balbi } 9267415f17cSFelipe Balbi 9277415f17cSFelipe Balbi static const struct dev_pm_ops dwc3_dev_pm_ops = { 9287415f17cSFelipe Balbi SET_SYSTEM_SLEEP_PM_OPS(dwc3_suspend, dwc3_resume) 9297415f17cSFelipe Balbi }; 9307415f17cSFelipe Balbi 9317415f17cSFelipe Balbi #define DWC3_PM_OPS &(dwc3_dev_pm_ops) 9327415f17cSFelipe Balbi #else 9337415f17cSFelipe Balbi #define DWC3_PM_OPS NULL 9347415f17cSFelipe Balbi #endif 9357415f17cSFelipe Balbi 9365088b6f5SKishon Vijay Abraham I #ifdef CONFIG_OF 9375088b6f5SKishon Vijay Abraham I static const struct of_device_id of_dwc3_match[] = { 9385088b6f5SKishon Vijay Abraham I { 93922a5aa17SFelipe Balbi .compatible = "snps,dwc3" 94022a5aa17SFelipe Balbi }, 94122a5aa17SFelipe Balbi { 9425088b6f5SKishon Vijay Abraham I .compatible = "synopsys,dwc3" 9435088b6f5SKishon Vijay Abraham I }, 9445088b6f5SKishon Vijay Abraham I { }, 9455088b6f5SKishon Vijay Abraham I }; 9465088b6f5SKishon Vijay Abraham I MODULE_DEVICE_TABLE(of, of_dwc3_match); 9475088b6f5SKishon Vijay Abraham I #endif 9485088b6f5SKishon Vijay Abraham I 949404905a6SHeikki Krogerus #ifdef CONFIG_ACPI 950404905a6SHeikki Krogerus 951404905a6SHeikki Krogerus #define ACPI_ID_INTEL_BSW "808622B7" 952404905a6SHeikki Krogerus 953404905a6SHeikki Krogerus static const struct acpi_device_id dwc3_acpi_match[] = { 954404905a6SHeikki Krogerus { ACPI_ID_INTEL_BSW, 0 }, 955404905a6SHeikki Krogerus { }, 956404905a6SHeikki Krogerus }; 957404905a6SHeikki Krogerus MODULE_DEVICE_TABLE(acpi, dwc3_acpi_match); 958404905a6SHeikki Krogerus #endif 959404905a6SHeikki Krogerus 96072246da4SFelipe Balbi static struct platform_driver dwc3_driver = { 96172246da4SFelipe Balbi .probe = dwc3_probe, 9627690417dSBill Pemberton .remove = dwc3_remove, 96372246da4SFelipe Balbi .driver = { 96472246da4SFelipe Balbi .name = "dwc3", 9655088b6f5SKishon Vijay Abraham I .of_match_table = of_match_ptr(of_dwc3_match), 966404905a6SHeikki Krogerus .acpi_match_table = ACPI_PTR(dwc3_acpi_match), 9677415f17cSFelipe Balbi .pm = DWC3_PM_OPS, 96872246da4SFelipe Balbi }, 96972246da4SFelipe Balbi }; 97072246da4SFelipe Balbi 971b1116dccSTobias Klauser module_platform_driver(dwc3_driver); 972b1116dccSTobias Klauser 9737ae4fc4dSSebastian Andrzej Siewior MODULE_ALIAS("platform:dwc3"); 97472246da4SFelipe Balbi MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); 9755945f789SFelipe Balbi MODULE_LICENSE("GPL v2"); 97672246da4SFelipe Balbi MODULE_DESCRIPTION("DesignWare USB3 DRD Controller Driver"); 977