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 * 972246da4SFelipe Balbi * Redistribution and use in source and binary forms, with or without 1072246da4SFelipe Balbi * modification, are permitted provided that the following conditions 1172246da4SFelipe Balbi * are met: 1272246da4SFelipe Balbi * 1. Redistributions of source code must retain the above copyright 1372246da4SFelipe Balbi * notice, this list of conditions, and the following disclaimer, 1472246da4SFelipe Balbi * without modification. 1572246da4SFelipe Balbi * 2. Redistributions in binary form must reproduce the above copyright 1672246da4SFelipe Balbi * notice, this list of conditions and the following disclaimer in the 1772246da4SFelipe Balbi * documentation and/or other materials provided with the distribution. 1872246da4SFelipe Balbi * 3. The names of the above-listed copyright holders may not be used 1972246da4SFelipe Balbi * to endorse or promote products derived from this software without 2072246da4SFelipe Balbi * specific prior written permission. 2172246da4SFelipe Balbi * 2272246da4SFelipe Balbi * ALTERNATIVELY, this software may be distributed under the terms of the 2372246da4SFelipe Balbi * GNU General Public License ("GPL") version 2, as published by the Free 2472246da4SFelipe Balbi * Software Foundation. 2572246da4SFelipe Balbi * 2672246da4SFelipe Balbi * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 2772246da4SFelipe Balbi * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 2872246da4SFelipe Balbi * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 2972246da4SFelipe Balbi * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 3072246da4SFelipe Balbi * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 3172246da4SFelipe Balbi * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 3272246da4SFelipe Balbi * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 3372246da4SFelipe Balbi * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 3472246da4SFelipe Balbi * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 3572246da4SFelipe Balbi * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 3672246da4SFelipe Balbi * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 3772246da4SFelipe Balbi */ 3872246da4SFelipe Balbi 39a72e658bSFelipe Balbi #include <linux/module.h> 4072246da4SFelipe Balbi #include <linux/kernel.h> 4172246da4SFelipe Balbi #include <linux/slab.h> 4272246da4SFelipe Balbi #include <linux/spinlock.h> 4372246da4SFelipe Balbi #include <linux/platform_device.h> 4472246da4SFelipe Balbi #include <linux/pm_runtime.h> 4572246da4SFelipe Balbi #include <linux/interrupt.h> 4672246da4SFelipe Balbi #include <linux/ioport.h> 4772246da4SFelipe Balbi #include <linux/io.h> 4872246da4SFelipe Balbi #include <linux/list.h> 4972246da4SFelipe Balbi #include <linux/delay.h> 5072246da4SFelipe Balbi #include <linux/dma-mapping.h> 51457e84b6SFelipe Balbi #include <linux/of.h> 5272246da4SFelipe Balbi 5351e1e7bcSFelipe Balbi #include <linux/usb/otg.h> 5472246da4SFelipe Balbi #include <linux/usb/ch9.h> 5572246da4SFelipe Balbi #include <linux/usb/gadget.h> 5672246da4SFelipe Balbi 5772246da4SFelipe Balbi #include "core.h" 5872246da4SFelipe Balbi #include "gadget.h" 5972246da4SFelipe Balbi #include "io.h" 6072246da4SFelipe Balbi 6172246da4SFelipe Balbi #include "debug.h" 6272246da4SFelipe Balbi 636c167fc9SFelipe Balbi static char *maximum_speed = "super"; 646c167fc9SFelipe Balbi module_param(maximum_speed, charp, 0); 656c167fc9SFelipe Balbi MODULE_PARM_DESC(maximum_speed, "Maximum supported speed."); 666c167fc9SFelipe Balbi 678300dd23SFelipe Balbi /* -------------------------------------------------------------------------- */ 688300dd23SFelipe Balbi 693140e8cbSSebastian Andrzej Siewior void dwc3_set_mode(struct dwc3 *dwc, u32 mode) 703140e8cbSSebastian Andrzej Siewior { 713140e8cbSSebastian Andrzej Siewior u32 reg; 723140e8cbSSebastian Andrzej Siewior 733140e8cbSSebastian Andrzej Siewior reg = dwc3_readl(dwc->regs, DWC3_GCTL); 743140e8cbSSebastian Andrzej Siewior reg &= ~(DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_OTG)); 753140e8cbSSebastian Andrzej Siewior reg |= DWC3_GCTL_PRTCAPDIR(mode); 763140e8cbSSebastian Andrzej Siewior dwc3_writel(dwc->regs, DWC3_GCTL, reg); 773140e8cbSSebastian Andrzej Siewior } 788300dd23SFelipe Balbi 7972246da4SFelipe Balbi /** 8072246da4SFelipe Balbi * dwc3_core_soft_reset - Issues core soft reset and PHY reset 8172246da4SFelipe Balbi * @dwc: pointer to our context structure 8272246da4SFelipe Balbi */ 8372246da4SFelipe Balbi static void dwc3_core_soft_reset(struct dwc3 *dwc) 8472246da4SFelipe Balbi { 8572246da4SFelipe Balbi u32 reg; 8672246da4SFelipe Balbi 8772246da4SFelipe Balbi /* Before Resetting PHY, put Core in Reset */ 8872246da4SFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GCTL); 8972246da4SFelipe Balbi reg |= DWC3_GCTL_CORESOFTRESET; 9072246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GCTL, reg); 9172246da4SFelipe Balbi 9272246da4SFelipe Balbi /* Assert USB3 PHY reset */ 9372246da4SFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); 9472246da4SFelipe Balbi reg |= DWC3_GUSB3PIPECTL_PHYSOFTRST; 9572246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); 9672246da4SFelipe Balbi 9772246da4SFelipe Balbi /* Assert USB2 PHY reset */ 9872246da4SFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); 9972246da4SFelipe Balbi reg |= DWC3_GUSB2PHYCFG_PHYSOFTRST; 10072246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); 10172246da4SFelipe Balbi 10251e1e7bcSFelipe Balbi usb_phy_init(dwc->usb2_phy); 10351e1e7bcSFelipe Balbi usb_phy_init(dwc->usb3_phy); 10472246da4SFelipe Balbi mdelay(100); 10572246da4SFelipe Balbi 10672246da4SFelipe Balbi /* Clear USB3 PHY reset */ 10772246da4SFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); 10872246da4SFelipe Balbi reg &= ~DWC3_GUSB3PIPECTL_PHYSOFTRST; 10972246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); 11072246da4SFelipe Balbi 11172246da4SFelipe Balbi /* Clear USB2 PHY reset */ 11272246da4SFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); 11372246da4SFelipe Balbi reg &= ~DWC3_GUSB2PHYCFG_PHYSOFTRST; 11472246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); 11572246da4SFelipe Balbi 11645627ac6SPratyush Anand mdelay(100); 11745627ac6SPratyush Anand 11872246da4SFelipe Balbi /* After PHYs are stable we can take Core out of reset state */ 11972246da4SFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GCTL); 12072246da4SFelipe Balbi reg &= ~DWC3_GCTL_CORESOFTRESET; 12172246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GCTL, reg); 12272246da4SFelipe Balbi } 12372246da4SFelipe Balbi 12472246da4SFelipe Balbi /** 12572246da4SFelipe Balbi * dwc3_free_one_event_buffer - Frees one event buffer 12672246da4SFelipe Balbi * @dwc: Pointer to our controller context structure 12772246da4SFelipe Balbi * @evt: Pointer to event buffer to be freed 12872246da4SFelipe Balbi */ 12972246da4SFelipe Balbi static void dwc3_free_one_event_buffer(struct dwc3 *dwc, 13072246da4SFelipe Balbi struct dwc3_event_buffer *evt) 13172246da4SFelipe Balbi { 13272246da4SFelipe Balbi dma_free_coherent(dwc->dev, evt->length, evt->buf, evt->dma); 13372246da4SFelipe Balbi } 13472246da4SFelipe Balbi 13572246da4SFelipe Balbi /** 1361d046793SPaul Zimmerman * dwc3_alloc_one_event_buffer - Allocates one event buffer structure 13772246da4SFelipe Balbi * @dwc: Pointer to our controller context structure 13872246da4SFelipe Balbi * @length: size of the event buffer 13972246da4SFelipe Balbi * 1401d046793SPaul Zimmerman * Returns a pointer to the allocated event buffer structure on success 14172246da4SFelipe Balbi * otherwise ERR_PTR(errno). 14272246da4SFelipe Balbi */ 14372246da4SFelipe Balbi static struct dwc3_event_buffer *__devinit 14472246da4SFelipe Balbi dwc3_alloc_one_event_buffer(struct dwc3 *dwc, unsigned length) 14572246da4SFelipe Balbi { 14672246da4SFelipe Balbi struct dwc3_event_buffer *evt; 14772246da4SFelipe Balbi 148380f0d28SFelipe Balbi evt = devm_kzalloc(dwc->dev, sizeof(*evt), GFP_KERNEL); 14972246da4SFelipe Balbi if (!evt) 15072246da4SFelipe Balbi return ERR_PTR(-ENOMEM); 15172246da4SFelipe Balbi 15272246da4SFelipe Balbi evt->dwc = dwc; 15372246da4SFelipe Balbi evt->length = length; 15472246da4SFelipe Balbi evt->buf = dma_alloc_coherent(dwc->dev, length, 15572246da4SFelipe Balbi &evt->dma, GFP_KERNEL); 156e32672f0SFelipe Balbi if (!evt->buf) 15772246da4SFelipe Balbi return ERR_PTR(-ENOMEM); 15872246da4SFelipe Balbi 15972246da4SFelipe Balbi return evt; 16072246da4SFelipe Balbi } 16172246da4SFelipe Balbi 16272246da4SFelipe Balbi /** 16372246da4SFelipe Balbi * dwc3_free_event_buffers - frees all allocated event buffers 16472246da4SFelipe Balbi * @dwc: Pointer to our controller context structure 16572246da4SFelipe Balbi */ 16672246da4SFelipe Balbi static void dwc3_free_event_buffers(struct dwc3 *dwc) 16772246da4SFelipe Balbi { 16872246da4SFelipe Balbi struct dwc3_event_buffer *evt; 16972246da4SFelipe Balbi int i; 17072246da4SFelipe Balbi 1719f622b2aSFelipe Balbi for (i = 0; i < dwc->num_event_buffers; i++) { 17272246da4SFelipe Balbi evt = dwc->ev_buffs[i]; 17364b6c8a7SAnton Tikhomirov if (evt) 17472246da4SFelipe Balbi dwc3_free_one_event_buffer(dwc, evt); 17572246da4SFelipe Balbi } 17672246da4SFelipe Balbi } 17772246da4SFelipe Balbi 17872246da4SFelipe Balbi /** 17972246da4SFelipe Balbi * dwc3_alloc_event_buffers - Allocates @num event buffers of size @length 1801d046793SPaul Zimmerman * @dwc: pointer to our controller context structure 18172246da4SFelipe Balbi * @length: size of event buffer 18272246da4SFelipe Balbi * 1831d046793SPaul Zimmerman * Returns 0 on success otherwise negative errno. In the error case, dwc 18472246da4SFelipe Balbi * may contain some buffers allocated but not all which were requested. 18572246da4SFelipe Balbi */ 1869f622b2aSFelipe Balbi static int __devinit dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned length) 18772246da4SFelipe Balbi { 1889f622b2aSFelipe Balbi int num; 18972246da4SFelipe Balbi int i; 19072246da4SFelipe Balbi 1919f622b2aSFelipe Balbi num = DWC3_NUM_INT(dwc->hwparams.hwparams1); 1929f622b2aSFelipe Balbi dwc->num_event_buffers = num; 1939f622b2aSFelipe Balbi 194380f0d28SFelipe Balbi dwc->ev_buffs = devm_kzalloc(dwc->dev, sizeof(*dwc->ev_buffs) * num, 195380f0d28SFelipe Balbi GFP_KERNEL); 196457d3f21SFelipe Balbi if (!dwc->ev_buffs) { 197457d3f21SFelipe Balbi dev_err(dwc->dev, "can't allocate event buffers array\n"); 198457d3f21SFelipe Balbi return -ENOMEM; 199457d3f21SFelipe Balbi } 200457d3f21SFelipe Balbi 20172246da4SFelipe Balbi for (i = 0; i < num; i++) { 20272246da4SFelipe Balbi struct dwc3_event_buffer *evt; 20372246da4SFelipe Balbi 20472246da4SFelipe Balbi evt = dwc3_alloc_one_event_buffer(dwc, length); 20572246da4SFelipe Balbi if (IS_ERR(evt)) { 20672246da4SFelipe Balbi dev_err(dwc->dev, "can't allocate event buffer\n"); 20772246da4SFelipe Balbi return PTR_ERR(evt); 20872246da4SFelipe Balbi } 20972246da4SFelipe Balbi dwc->ev_buffs[i] = evt; 21072246da4SFelipe Balbi } 21172246da4SFelipe Balbi 21272246da4SFelipe Balbi return 0; 21372246da4SFelipe Balbi } 21472246da4SFelipe Balbi 21572246da4SFelipe Balbi /** 21672246da4SFelipe Balbi * dwc3_event_buffers_setup - setup our allocated event buffers 2171d046793SPaul Zimmerman * @dwc: pointer to our controller context structure 21872246da4SFelipe Balbi * 21972246da4SFelipe Balbi * Returns 0 on success otherwise negative errno. 22072246da4SFelipe Balbi */ 2217acd85e0SPaul Zimmerman static int dwc3_event_buffers_setup(struct dwc3 *dwc) 22272246da4SFelipe Balbi { 22372246da4SFelipe Balbi struct dwc3_event_buffer *evt; 22472246da4SFelipe Balbi int n; 22572246da4SFelipe Balbi 2269f622b2aSFelipe Balbi for (n = 0; n < dwc->num_event_buffers; n++) { 22772246da4SFelipe Balbi evt = dwc->ev_buffs[n]; 22872246da4SFelipe Balbi dev_dbg(dwc->dev, "Event buf %p dma %08llx length %d\n", 22972246da4SFelipe Balbi evt->buf, (unsigned long long) evt->dma, 23072246da4SFelipe Balbi evt->length); 23172246da4SFelipe Balbi 2327acd85e0SPaul Zimmerman evt->lpos = 0; 2337acd85e0SPaul Zimmerman 23472246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(n), 23572246da4SFelipe Balbi lower_32_bits(evt->dma)); 23672246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(n), 23772246da4SFelipe Balbi upper_32_bits(evt->dma)); 23872246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(n), 23972246da4SFelipe Balbi evt->length & 0xffff); 24072246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(n), 0); 24172246da4SFelipe Balbi } 24272246da4SFelipe Balbi 24372246da4SFelipe Balbi return 0; 24472246da4SFelipe Balbi } 24572246da4SFelipe Balbi 24672246da4SFelipe Balbi static void dwc3_event_buffers_cleanup(struct dwc3 *dwc) 24772246da4SFelipe Balbi { 24872246da4SFelipe Balbi struct dwc3_event_buffer *evt; 24972246da4SFelipe Balbi int n; 25072246da4SFelipe Balbi 2519f622b2aSFelipe Balbi for (n = 0; n < dwc->num_event_buffers; n++) { 25272246da4SFelipe Balbi evt = dwc->ev_buffs[n]; 2537acd85e0SPaul Zimmerman 2547acd85e0SPaul Zimmerman evt->lpos = 0; 2557acd85e0SPaul Zimmerman 25672246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(n), 0); 25772246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(n), 0); 25872246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(n), 0); 25972246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(n), 0); 26072246da4SFelipe Balbi } 26172246da4SFelipe Balbi } 26272246da4SFelipe Balbi 26326ceca97SFelipe Balbi static void __devinit dwc3_cache_hwparams(struct dwc3 *dwc) 26426ceca97SFelipe Balbi { 26526ceca97SFelipe Balbi struct dwc3_hwparams *parms = &dwc->hwparams; 26626ceca97SFelipe Balbi 26726ceca97SFelipe Balbi parms->hwparams0 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS0); 26826ceca97SFelipe Balbi parms->hwparams1 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS1); 26926ceca97SFelipe Balbi parms->hwparams2 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS2); 27026ceca97SFelipe Balbi parms->hwparams3 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS3); 27126ceca97SFelipe Balbi parms->hwparams4 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS4); 27226ceca97SFelipe Balbi parms->hwparams5 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS5); 27326ceca97SFelipe Balbi parms->hwparams6 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS6); 27426ceca97SFelipe Balbi parms->hwparams7 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS7); 27526ceca97SFelipe Balbi parms->hwparams8 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS8); 27626ceca97SFelipe Balbi } 27726ceca97SFelipe Balbi 27872246da4SFelipe Balbi /** 27972246da4SFelipe Balbi * dwc3_core_init - Low-level initialization of DWC3 Core 28072246da4SFelipe Balbi * @dwc: Pointer to our controller context structure 28172246da4SFelipe Balbi * 28272246da4SFelipe Balbi * Returns 0 on success otherwise negative errno. 28372246da4SFelipe Balbi */ 28472246da4SFelipe Balbi static int __devinit dwc3_core_init(struct dwc3 *dwc) 28572246da4SFelipe Balbi { 28672246da4SFelipe Balbi unsigned long timeout; 28772246da4SFelipe Balbi u32 reg; 28872246da4SFelipe Balbi int ret; 28972246da4SFelipe Balbi 2907650bd74SSebastian Andrzej Siewior reg = dwc3_readl(dwc->regs, DWC3_GSNPSID); 2917650bd74SSebastian Andrzej Siewior /* This should read as U3 followed by revision number */ 2927650bd74SSebastian Andrzej Siewior if ((reg & DWC3_GSNPSID_MASK) != 0x55330000) { 2937650bd74SSebastian Andrzej Siewior dev_err(dwc->dev, "this is not a DesignWare USB3 DRD Core\n"); 2947650bd74SSebastian Andrzej Siewior ret = -ENODEV; 2957650bd74SSebastian Andrzej Siewior goto err0; 2967650bd74SSebastian Andrzej Siewior } 297248b122bSFelipe Balbi dwc->revision = reg; 2987650bd74SSebastian Andrzej Siewior 29972246da4SFelipe Balbi /* issue device SoftReset too */ 30072246da4SFelipe Balbi timeout = jiffies + msecs_to_jiffies(500); 30172246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, DWC3_DCTL_CSFTRST); 30272246da4SFelipe Balbi do { 30372246da4SFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 30472246da4SFelipe Balbi if (!(reg & DWC3_DCTL_CSFTRST)) 30572246da4SFelipe Balbi break; 30672246da4SFelipe Balbi 30772246da4SFelipe Balbi if (time_after(jiffies, timeout)) { 30872246da4SFelipe Balbi dev_err(dwc->dev, "Reset Timed Out\n"); 30972246da4SFelipe Balbi ret = -ETIMEDOUT; 31072246da4SFelipe Balbi goto err0; 31172246da4SFelipe Balbi } 31272246da4SFelipe Balbi 31372246da4SFelipe Balbi cpu_relax(); 31472246da4SFelipe Balbi } while (true); 31572246da4SFelipe Balbi 31658a0f23fSPratyush Anand dwc3_core_soft_reset(dwc); 31758a0f23fSPratyush Anand 3184878a028SSebastian Andrzej Siewior reg = dwc3_readl(dwc->regs, DWC3_GCTL); 3193e87c42aSPaul Zimmerman reg &= ~DWC3_GCTL_SCALEDOWN_MASK; 3204878a028SSebastian Andrzej Siewior reg &= ~DWC3_GCTL_DISSCRAMBLE; 3214878a028SSebastian Andrzej Siewior 322164d7731SSebastian Andrzej Siewior switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams1)) { 3234878a028SSebastian Andrzej Siewior case DWC3_GHWPARAMS1_EN_PWROPT_CLK: 3244878a028SSebastian Andrzej Siewior reg &= ~DWC3_GCTL_DSBLCLKGTNG; 3254878a028SSebastian Andrzej Siewior break; 3264878a028SSebastian Andrzej Siewior default: 3274878a028SSebastian Andrzej Siewior dev_dbg(dwc->dev, "No power optimization available\n"); 3284878a028SSebastian Andrzej Siewior } 3294878a028SSebastian Andrzej Siewior 3304878a028SSebastian Andrzej Siewior /* 3314878a028SSebastian Andrzej Siewior * WORKAROUND: DWC3 revisions <1.90a have a bug 3321d046793SPaul Zimmerman * where the device can fail to connect at SuperSpeed 3334878a028SSebastian Andrzej Siewior * and falls back to high-speed mode which causes 3341d046793SPaul Zimmerman * the device to enter a Connect/Disconnect loop 3354878a028SSebastian Andrzej Siewior */ 3364878a028SSebastian Andrzej Siewior if (dwc->revision < DWC3_REVISION_190A) 3374878a028SSebastian Andrzej Siewior reg |= DWC3_GCTL_U2RSTECN; 3384878a028SSebastian Andrzej Siewior 3394878a028SSebastian Andrzej Siewior dwc3_writel(dwc->regs, DWC3_GCTL, reg); 3404878a028SSebastian Andrzej Siewior 34172246da4SFelipe Balbi ret = dwc3_event_buffers_setup(dwc); 34272246da4SFelipe Balbi if (ret) { 34372246da4SFelipe Balbi dev_err(dwc->dev, "failed to setup event buffers\n"); 3443921426bSFelipe Balbi goto err0; 34572246da4SFelipe Balbi } 34672246da4SFelipe Balbi 34772246da4SFelipe Balbi return 0; 34872246da4SFelipe Balbi 34972246da4SFelipe Balbi err0: 35072246da4SFelipe Balbi return ret; 35172246da4SFelipe Balbi } 35272246da4SFelipe Balbi 35372246da4SFelipe Balbi static void dwc3_core_exit(struct dwc3 *dwc) 35472246da4SFelipe Balbi { 35572246da4SFelipe Balbi dwc3_event_buffers_cleanup(dwc); 35601b8daf7SVivek Gautam 35701b8daf7SVivek Gautam usb_phy_shutdown(dwc->usb2_phy); 35801b8daf7SVivek Gautam usb_phy_shutdown(dwc->usb3_phy); 35972246da4SFelipe Balbi } 36072246da4SFelipe Balbi 36172246da4SFelipe Balbi #define DWC3_ALIGN_MASK (16 - 1) 36272246da4SFelipe Balbi 36372246da4SFelipe Balbi static int __devinit dwc3_probe(struct platform_device *pdev) 36472246da4SFelipe Balbi { 365457e84b6SFelipe Balbi struct device_node *node = pdev->dev.of_node; 36672246da4SFelipe Balbi struct resource *res; 36772246da4SFelipe Balbi struct dwc3 *dwc; 368802ca850SChanho Park struct device *dev = &pdev->dev; 3690949e99bSFelipe Balbi 37072246da4SFelipe Balbi int ret = -ENOMEM; 3710949e99bSFelipe Balbi 3720949e99bSFelipe Balbi void __iomem *regs; 37372246da4SFelipe Balbi void *mem; 37472246da4SFelipe Balbi 3750949e99bSFelipe Balbi u8 mode; 3760949e99bSFelipe Balbi 377802ca850SChanho Park mem = devm_kzalloc(dev, sizeof(*dwc) + DWC3_ALIGN_MASK, GFP_KERNEL); 37872246da4SFelipe Balbi if (!mem) { 379802ca850SChanho Park dev_err(dev, "not enough memory\n"); 380802ca850SChanho Park return -ENOMEM; 38172246da4SFelipe Balbi } 38272246da4SFelipe Balbi dwc = PTR_ALIGN(mem, DWC3_ALIGN_MASK + 1); 38372246da4SFelipe Balbi dwc->mem = mem; 38472246da4SFelipe Balbi 38551249dcaSIdo Shayevitz res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); 38672246da4SFelipe Balbi if (!res) { 38751249dcaSIdo Shayevitz dev_err(dev, "missing IRQ\n"); 388802ca850SChanho Park return -ENODEV; 38972246da4SFelipe Balbi } 390066618bcSKishon Vijay Abraham I dwc->xhci_resources[1].start = res->start; 391066618bcSKishon Vijay Abraham I dwc->xhci_resources[1].end = res->end; 392066618bcSKishon Vijay Abraham I dwc->xhci_resources[1].flags = res->flags; 393066618bcSKishon Vijay Abraham I dwc->xhci_resources[1].name = res->name; 39472246da4SFelipe Balbi 39551249dcaSIdo Shayevitz res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 39651249dcaSIdo Shayevitz if (!res) { 39751249dcaSIdo Shayevitz dev_err(dev, "missing memory resource\n"); 39851249dcaSIdo Shayevitz return -ENODEV; 39951249dcaSIdo Shayevitz } 400066618bcSKishon Vijay Abraham I dwc->xhci_resources[0].start = res->start; 40151249dcaSIdo Shayevitz dwc->xhci_resources[0].end = dwc->xhci_resources[0].start + 40251249dcaSIdo Shayevitz DWC3_XHCI_REGS_END; 403066618bcSKishon Vijay Abraham I dwc->xhci_resources[0].flags = res->flags; 404066618bcSKishon Vijay Abraham I dwc->xhci_resources[0].name = res->name; 405d07e8819SFelipe Balbi 40651249dcaSIdo Shayevitz /* 40751249dcaSIdo Shayevitz * Request memory region but exclude xHCI regs, 40851249dcaSIdo Shayevitz * since it will be requested by the xhci-plat driver. 40951249dcaSIdo Shayevitz */ 41051249dcaSIdo Shayevitz res = devm_request_mem_region(dev, res->start + DWC3_GLOBALS_REGS_START, 41151249dcaSIdo Shayevitz resource_size(res) - DWC3_GLOBALS_REGS_START, 412802ca850SChanho Park dev_name(dev)); 41372246da4SFelipe Balbi if (!res) { 414802ca850SChanho Park dev_err(dev, "can't request mem region\n"); 415802ca850SChanho Park return -ENOMEM; 41672246da4SFelipe Balbi } 41772246da4SFelipe Balbi 418b7e38aa6SFelipe Balbi regs = devm_ioremap_nocache(dev, res->start, resource_size(res)); 41972246da4SFelipe Balbi if (!regs) { 420802ca850SChanho Park dev_err(dev, "ioremap failed\n"); 421802ca850SChanho Park return -ENOMEM; 42272246da4SFelipe Balbi } 42372246da4SFelipe Balbi 42451e1e7bcSFelipe Balbi dwc->usb2_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2); 42551e1e7bcSFelipe Balbi if (IS_ERR_OR_NULL(dwc->usb2_phy)) { 42651e1e7bcSFelipe Balbi dev_err(dev, "no usb2 phy configured\n"); 42751e1e7bcSFelipe Balbi return -EPROBE_DEFER; 42851e1e7bcSFelipe Balbi } 42951e1e7bcSFelipe Balbi 43051e1e7bcSFelipe Balbi dwc->usb3_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB3); 43151e1e7bcSFelipe Balbi if (IS_ERR_OR_NULL(dwc->usb3_phy)) { 43251e1e7bcSFelipe Balbi dev_err(dev, "no usb3 phy configured\n"); 43351e1e7bcSFelipe Balbi return -EPROBE_DEFER; 43451e1e7bcSFelipe Balbi } 43551e1e7bcSFelipe Balbi 43672246da4SFelipe Balbi spin_lock_init(&dwc->lock); 43772246da4SFelipe Balbi platform_set_drvdata(pdev, dwc); 43872246da4SFelipe Balbi 43972246da4SFelipe Balbi dwc->regs = regs; 44072246da4SFelipe Balbi dwc->regs_size = resource_size(res); 441802ca850SChanho Park dwc->dev = dev; 44272246da4SFelipe Balbi 4436c167fc9SFelipe Balbi if (!strncmp("super", maximum_speed, 5)) 4446c167fc9SFelipe Balbi dwc->maximum_speed = DWC3_DCFG_SUPERSPEED; 4456c167fc9SFelipe Balbi else if (!strncmp("high", maximum_speed, 4)) 4466c167fc9SFelipe Balbi dwc->maximum_speed = DWC3_DCFG_HIGHSPEED; 4476c167fc9SFelipe Balbi else if (!strncmp("full", maximum_speed, 4)) 4486c167fc9SFelipe Balbi dwc->maximum_speed = DWC3_DCFG_FULLSPEED1; 4496c167fc9SFelipe Balbi else if (!strncmp("low", maximum_speed, 3)) 4506c167fc9SFelipe Balbi dwc->maximum_speed = DWC3_DCFG_LOWSPEED; 4516c167fc9SFelipe Balbi else 4526c167fc9SFelipe Balbi dwc->maximum_speed = DWC3_DCFG_SUPERSPEED; 4536c167fc9SFelipe Balbi 454457e84b6SFelipe Balbi if (of_get_property(node, "tx-fifo-resize", NULL)) 455457e84b6SFelipe Balbi dwc->needs_fifo_resize = true; 456457e84b6SFelipe Balbi 457802ca850SChanho Park pm_runtime_enable(dev); 458802ca850SChanho Park pm_runtime_get_sync(dev); 459802ca850SChanho Park pm_runtime_forbid(dev); 46072246da4SFelipe Balbi 4614fd24483SKishon Vijay Abraham I dwc3_cache_hwparams(dwc); 4624fd24483SKishon Vijay Abraham I 4633921426bSFelipe Balbi ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE); 4643921426bSFelipe Balbi if (ret) { 4653921426bSFelipe Balbi dev_err(dwc->dev, "failed to allocate event buffers\n"); 4663921426bSFelipe Balbi ret = -ENOMEM; 4673921426bSFelipe Balbi goto err0; 4683921426bSFelipe Balbi } 4693921426bSFelipe Balbi 47072246da4SFelipe Balbi ret = dwc3_core_init(dwc); 47172246da4SFelipe Balbi if (ret) { 472802ca850SChanho Park dev_err(dev, "failed to initialize core\n"); 4733921426bSFelipe Balbi goto err0; 47472246da4SFelipe Balbi } 47572246da4SFelipe Balbi 4760949e99bSFelipe Balbi mode = DWC3_MODE(dwc->hwparams.hwparams0); 4770949e99bSFelipe Balbi 4780949e99bSFelipe Balbi switch (mode) { 4790949e99bSFelipe Balbi case DWC3_MODE_DEVICE: 4803140e8cbSSebastian Andrzej Siewior dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE); 48172246da4SFelipe Balbi ret = dwc3_gadget_init(dwc); 48272246da4SFelipe Balbi if (ret) { 483802ca850SChanho Park dev_err(dev, "failed to initialize gadget\n"); 484802ca850SChanho Park goto err1; 48572246da4SFelipe Balbi } 4860949e99bSFelipe Balbi break; 487d07e8819SFelipe Balbi case DWC3_MODE_HOST: 4883140e8cbSSebastian Andrzej Siewior dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_HOST); 489d07e8819SFelipe Balbi ret = dwc3_host_init(dwc); 490d07e8819SFelipe Balbi if (ret) { 491802ca850SChanho Park dev_err(dev, "failed to initialize host\n"); 492802ca850SChanho Park goto err1; 49372246da4SFelipe Balbi } 494d07e8819SFelipe Balbi break; 495d07e8819SFelipe Balbi case DWC3_MODE_DRD: 4963140e8cbSSebastian Andrzej Siewior dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_OTG); 497d07e8819SFelipe Balbi ret = dwc3_host_init(dwc); 498d07e8819SFelipe Balbi if (ret) { 499802ca850SChanho Park dev_err(dev, "failed to initialize host\n"); 500802ca850SChanho Park goto err1; 501d07e8819SFelipe Balbi } 502d07e8819SFelipe Balbi 503d07e8819SFelipe Balbi ret = dwc3_gadget_init(dwc); 504d07e8819SFelipe Balbi if (ret) { 505802ca850SChanho Park dev_err(dev, "failed to initialize gadget\n"); 506802ca850SChanho Park goto err1; 507d07e8819SFelipe Balbi } 508d07e8819SFelipe Balbi break; 5090949e99bSFelipe Balbi default: 510802ca850SChanho Park dev_err(dev, "Unsupported mode of operation %d\n", mode); 511802ca850SChanho Park goto err1; 51272246da4SFelipe Balbi } 5130949e99bSFelipe Balbi dwc->mode = mode; 51472246da4SFelipe Balbi 51572246da4SFelipe Balbi ret = dwc3_debugfs_init(dwc); 51672246da4SFelipe Balbi if (ret) { 517802ca850SChanho Park dev_err(dev, "failed to initialize debugfs\n"); 518802ca850SChanho Park goto err2; 51972246da4SFelipe Balbi } 52072246da4SFelipe Balbi 521802ca850SChanho Park pm_runtime_allow(dev); 52272246da4SFelipe Balbi 52372246da4SFelipe Balbi return 0; 52472246da4SFelipe Balbi 525802ca850SChanho Park err2: 5260949e99bSFelipe Balbi switch (mode) { 5270949e99bSFelipe Balbi case DWC3_MODE_DEVICE: 52872246da4SFelipe Balbi dwc3_gadget_exit(dwc); 5290949e99bSFelipe Balbi break; 530d07e8819SFelipe Balbi case DWC3_MODE_HOST: 531d07e8819SFelipe Balbi dwc3_host_exit(dwc); 532d07e8819SFelipe Balbi break; 533d07e8819SFelipe Balbi case DWC3_MODE_DRD: 534d07e8819SFelipe Balbi dwc3_host_exit(dwc); 535d07e8819SFelipe Balbi dwc3_gadget_exit(dwc); 536d07e8819SFelipe Balbi break; 5370949e99bSFelipe Balbi default: 5380949e99bSFelipe Balbi /* do nothing */ 5390949e99bSFelipe Balbi break; 5400949e99bSFelipe Balbi } 54172246da4SFelipe Balbi 542802ca850SChanho Park err1: 54372246da4SFelipe Balbi dwc3_core_exit(dwc); 54472246da4SFelipe Balbi 5453921426bSFelipe Balbi err0: 5463921426bSFelipe Balbi dwc3_free_event_buffers(dwc); 5473921426bSFelipe Balbi 54872246da4SFelipe Balbi return ret; 54972246da4SFelipe Balbi } 55072246da4SFelipe Balbi 55172246da4SFelipe Balbi static int __devexit dwc3_remove(struct platform_device *pdev) 55272246da4SFelipe Balbi { 55372246da4SFelipe Balbi struct dwc3 *dwc = platform_get_drvdata(pdev); 55472246da4SFelipe Balbi struct resource *res; 55572246da4SFelipe Balbi 55672246da4SFelipe Balbi res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 55772246da4SFelipe Balbi 55872246da4SFelipe Balbi pm_runtime_put(&pdev->dev); 55972246da4SFelipe Balbi pm_runtime_disable(&pdev->dev); 56072246da4SFelipe Balbi 56172246da4SFelipe Balbi dwc3_debugfs_exit(dwc); 56272246da4SFelipe Balbi 5630949e99bSFelipe Balbi switch (dwc->mode) { 5640949e99bSFelipe Balbi case DWC3_MODE_DEVICE: 56572246da4SFelipe Balbi dwc3_gadget_exit(dwc); 5660949e99bSFelipe Balbi break; 567d07e8819SFelipe Balbi case DWC3_MODE_HOST: 568d07e8819SFelipe Balbi dwc3_host_exit(dwc); 569d07e8819SFelipe Balbi break; 570d07e8819SFelipe Balbi case DWC3_MODE_DRD: 571d07e8819SFelipe Balbi dwc3_host_exit(dwc); 572d07e8819SFelipe Balbi dwc3_gadget_exit(dwc); 573d07e8819SFelipe Balbi break; 5740949e99bSFelipe Balbi default: 5750949e99bSFelipe Balbi /* do nothing */ 5760949e99bSFelipe Balbi break; 5770949e99bSFelipe Balbi } 57872246da4SFelipe Balbi 57972246da4SFelipe Balbi dwc3_core_exit(dwc); 58072246da4SFelipe Balbi 58172246da4SFelipe Balbi return 0; 58272246da4SFelipe Balbi } 58372246da4SFelipe Balbi 58472246da4SFelipe Balbi static struct platform_driver dwc3_driver = { 58572246da4SFelipe Balbi .probe = dwc3_probe, 586*7690417dSBill Pemberton .remove = dwc3_remove, 58772246da4SFelipe Balbi .driver = { 58872246da4SFelipe Balbi .name = "dwc3", 58972246da4SFelipe Balbi }, 59072246da4SFelipe Balbi }; 59172246da4SFelipe Balbi 592b1116dccSTobias Klauser module_platform_driver(dwc3_driver); 593b1116dccSTobias Klauser 5947ae4fc4dSSebastian Andrzej Siewior MODULE_ALIAS("platform:dwc3"); 59572246da4SFelipe Balbi MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); 59672246da4SFelipe Balbi MODULE_LICENSE("Dual BSD/GPL"); 59772246da4SFelipe Balbi MODULE_DESCRIPTION("DesignWare USB3 DRD Controller Driver"); 598