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 5372246da4SFelipe Balbi #include <linux/usb/ch9.h> 5472246da4SFelipe Balbi #include <linux/usb/gadget.h> 5572246da4SFelipe Balbi 5672246da4SFelipe Balbi #include "core.h" 5772246da4SFelipe Balbi #include "gadget.h" 5872246da4SFelipe Balbi #include "io.h" 5972246da4SFelipe Balbi 6072246da4SFelipe Balbi #include "debug.h" 6172246da4SFelipe Balbi 626c167fc9SFelipe Balbi static char *maximum_speed = "super"; 636c167fc9SFelipe Balbi module_param(maximum_speed, charp, 0); 646c167fc9SFelipe Balbi MODULE_PARM_DESC(maximum_speed, "Maximum supported speed."); 656c167fc9SFelipe Balbi 668300dd23SFelipe Balbi /* -------------------------------------------------------------------------- */ 678300dd23SFelipe Balbi 688300dd23SFelipe Balbi #define DWC3_DEVS_POSSIBLE 32 698300dd23SFelipe Balbi 708300dd23SFelipe Balbi static DECLARE_BITMAP(dwc3_devs, DWC3_DEVS_POSSIBLE); 718300dd23SFelipe Balbi 728300dd23SFelipe Balbi int dwc3_get_device_id(void) 738300dd23SFelipe Balbi { 748300dd23SFelipe Balbi int id; 758300dd23SFelipe Balbi 768300dd23SFelipe Balbi again: 778300dd23SFelipe Balbi id = find_first_zero_bit(dwc3_devs, DWC3_DEVS_POSSIBLE); 788300dd23SFelipe Balbi if (id < DWC3_DEVS_POSSIBLE) { 798300dd23SFelipe Balbi int old; 808300dd23SFelipe Balbi 818300dd23SFelipe Balbi old = test_and_set_bit(id, dwc3_devs); 828300dd23SFelipe Balbi if (old) 838300dd23SFelipe Balbi goto again; 848300dd23SFelipe Balbi } else { 858300dd23SFelipe Balbi pr_err("dwc3: no space for new device\n"); 868300dd23SFelipe Balbi id = -ENOMEM; 878300dd23SFelipe Balbi } 888300dd23SFelipe Balbi 89075cd14dSDan Carpenter return id; 908300dd23SFelipe Balbi } 918300dd23SFelipe Balbi EXPORT_SYMBOL_GPL(dwc3_get_device_id); 928300dd23SFelipe Balbi 938300dd23SFelipe Balbi void dwc3_put_device_id(int id) 948300dd23SFelipe Balbi { 958300dd23SFelipe Balbi int ret; 968300dd23SFelipe Balbi 978300dd23SFelipe Balbi if (id < 0) 988300dd23SFelipe Balbi return; 998300dd23SFelipe Balbi 1008300dd23SFelipe Balbi ret = test_bit(id, dwc3_devs); 1018300dd23SFelipe Balbi WARN(!ret, "dwc3: ID %d not in use\n", id); 1028300dd23SFelipe Balbi clear_bit(id, dwc3_devs); 1038300dd23SFelipe Balbi } 1048300dd23SFelipe Balbi EXPORT_SYMBOL_GPL(dwc3_put_device_id); 1058300dd23SFelipe Balbi 1063140e8cbSSebastian Andrzej Siewior void dwc3_set_mode(struct dwc3 *dwc, u32 mode) 1073140e8cbSSebastian Andrzej Siewior { 1083140e8cbSSebastian Andrzej Siewior u32 reg; 1093140e8cbSSebastian Andrzej Siewior 1103140e8cbSSebastian Andrzej Siewior reg = dwc3_readl(dwc->regs, DWC3_GCTL); 1113140e8cbSSebastian Andrzej Siewior reg &= ~(DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_OTG)); 1123140e8cbSSebastian Andrzej Siewior reg |= DWC3_GCTL_PRTCAPDIR(mode); 1133140e8cbSSebastian Andrzej Siewior dwc3_writel(dwc->regs, DWC3_GCTL, reg); 1143140e8cbSSebastian Andrzej Siewior } 1158300dd23SFelipe Balbi 11672246da4SFelipe Balbi /** 11772246da4SFelipe Balbi * dwc3_core_soft_reset - Issues core soft reset and PHY reset 11872246da4SFelipe Balbi * @dwc: pointer to our context structure 11972246da4SFelipe Balbi */ 12072246da4SFelipe Balbi static void dwc3_core_soft_reset(struct dwc3 *dwc) 12172246da4SFelipe Balbi { 12272246da4SFelipe Balbi u32 reg; 12372246da4SFelipe Balbi 12472246da4SFelipe Balbi /* Before Resetting PHY, put Core in Reset */ 12572246da4SFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GCTL); 12672246da4SFelipe Balbi reg |= DWC3_GCTL_CORESOFTRESET; 12772246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GCTL, reg); 12872246da4SFelipe Balbi 12972246da4SFelipe Balbi /* Assert USB3 PHY reset */ 13072246da4SFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); 13172246da4SFelipe Balbi reg |= DWC3_GUSB3PIPECTL_PHYSOFTRST; 13272246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); 13372246da4SFelipe Balbi 13472246da4SFelipe Balbi /* Assert USB2 PHY reset */ 13572246da4SFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); 13672246da4SFelipe Balbi reg |= DWC3_GUSB2PHYCFG_PHYSOFTRST; 13772246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); 13872246da4SFelipe Balbi 13972246da4SFelipe Balbi mdelay(100); 14072246da4SFelipe Balbi 14172246da4SFelipe Balbi /* Clear USB3 PHY reset */ 14272246da4SFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); 14372246da4SFelipe Balbi reg &= ~DWC3_GUSB3PIPECTL_PHYSOFTRST; 14472246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); 14572246da4SFelipe Balbi 14672246da4SFelipe Balbi /* Clear USB2 PHY reset */ 14772246da4SFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); 14872246da4SFelipe Balbi reg &= ~DWC3_GUSB2PHYCFG_PHYSOFTRST; 14972246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); 15072246da4SFelipe Balbi 15172246da4SFelipe Balbi /* After PHYs are stable we can take Core out of reset state */ 15272246da4SFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_GCTL); 15372246da4SFelipe Balbi reg &= ~DWC3_GCTL_CORESOFTRESET; 15472246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GCTL, reg); 15572246da4SFelipe Balbi } 15672246da4SFelipe Balbi 15772246da4SFelipe Balbi /** 15872246da4SFelipe Balbi * dwc3_free_one_event_buffer - Frees one event buffer 15972246da4SFelipe Balbi * @dwc: Pointer to our controller context structure 16072246da4SFelipe Balbi * @evt: Pointer to event buffer to be freed 16172246da4SFelipe Balbi */ 16272246da4SFelipe Balbi static void dwc3_free_one_event_buffer(struct dwc3 *dwc, 16372246da4SFelipe Balbi struct dwc3_event_buffer *evt) 16472246da4SFelipe Balbi { 16572246da4SFelipe Balbi dma_free_coherent(dwc->dev, evt->length, evt->buf, evt->dma); 16672246da4SFelipe Balbi kfree(evt); 16772246da4SFelipe Balbi } 16872246da4SFelipe Balbi 16972246da4SFelipe Balbi /** 1701d046793SPaul Zimmerman * dwc3_alloc_one_event_buffer - Allocates one event buffer structure 17172246da4SFelipe Balbi * @dwc: Pointer to our controller context structure 17272246da4SFelipe Balbi * @length: size of the event buffer 17372246da4SFelipe Balbi * 1741d046793SPaul Zimmerman * Returns a pointer to the allocated event buffer structure on success 17572246da4SFelipe Balbi * otherwise ERR_PTR(errno). 17672246da4SFelipe Balbi */ 17772246da4SFelipe Balbi static struct dwc3_event_buffer *__devinit 17872246da4SFelipe Balbi dwc3_alloc_one_event_buffer(struct dwc3 *dwc, unsigned length) 17972246da4SFelipe Balbi { 18072246da4SFelipe Balbi struct dwc3_event_buffer *evt; 18172246da4SFelipe Balbi 18272246da4SFelipe Balbi evt = kzalloc(sizeof(*evt), GFP_KERNEL); 18372246da4SFelipe Balbi if (!evt) 18472246da4SFelipe Balbi return ERR_PTR(-ENOMEM); 18572246da4SFelipe Balbi 18672246da4SFelipe Balbi evt->dwc = dwc; 18772246da4SFelipe Balbi evt->length = length; 18872246da4SFelipe Balbi evt->buf = dma_alloc_coherent(dwc->dev, length, 18972246da4SFelipe Balbi &evt->dma, GFP_KERNEL); 19072246da4SFelipe Balbi if (!evt->buf) { 19172246da4SFelipe Balbi kfree(evt); 19272246da4SFelipe Balbi return ERR_PTR(-ENOMEM); 19372246da4SFelipe Balbi } 19472246da4SFelipe Balbi 19572246da4SFelipe Balbi return evt; 19672246da4SFelipe Balbi } 19772246da4SFelipe Balbi 19872246da4SFelipe Balbi /** 19972246da4SFelipe Balbi * dwc3_free_event_buffers - frees all allocated event buffers 20072246da4SFelipe Balbi * @dwc: Pointer to our controller context structure 20172246da4SFelipe Balbi */ 20272246da4SFelipe Balbi static void dwc3_free_event_buffers(struct dwc3 *dwc) 20372246da4SFelipe Balbi { 20472246da4SFelipe Balbi struct dwc3_event_buffer *evt; 20572246da4SFelipe Balbi int i; 20672246da4SFelipe Balbi 2079f622b2aSFelipe Balbi for (i = 0; i < dwc->num_event_buffers; i++) { 20872246da4SFelipe Balbi evt = dwc->ev_buffs[i]; 20972246da4SFelipe Balbi if (evt) { 21072246da4SFelipe Balbi dwc3_free_one_event_buffer(dwc, evt); 21172246da4SFelipe Balbi dwc->ev_buffs[i] = NULL; 21272246da4SFelipe Balbi } 21372246da4SFelipe Balbi } 21472246da4SFelipe Balbi } 21572246da4SFelipe Balbi 21672246da4SFelipe Balbi /** 21772246da4SFelipe Balbi * dwc3_alloc_event_buffers - Allocates @num event buffers of size @length 2181d046793SPaul Zimmerman * @dwc: pointer to our controller context structure 21972246da4SFelipe Balbi * @length: size of event buffer 22072246da4SFelipe Balbi * 2211d046793SPaul Zimmerman * Returns 0 on success otherwise negative errno. In the error case, dwc 22272246da4SFelipe Balbi * may contain some buffers allocated but not all which were requested. 22372246da4SFelipe Balbi */ 2249f622b2aSFelipe Balbi static int __devinit dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned length) 22572246da4SFelipe Balbi { 2269f622b2aSFelipe Balbi int num; 22772246da4SFelipe Balbi int i; 22872246da4SFelipe Balbi 2299f622b2aSFelipe Balbi num = DWC3_NUM_INT(dwc->hwparams.hwparams1); 2309f622b2aSFelipe Balbi dwc->num_event_buffers = num; 2319f622b2aSFelipe Balbi 232457d3f21SFelipe Balbi dwc->ev_buffs = kzalloc(sizeof(*dwc->ev_buffs) * num, GFP_KERNEL); 233457d3f21SFelipe Balbi if (!dwc->ev_buffs) { 234457d3f21SFelipe Balbi dev_err(dwc->dev, "can't allocate event buffers array\n"); 235457d3f21SFelipe Balbi return -ENOMEM; 236457d3f21SFelipe Balbi } 237457d3f21SFelipe Balbi 23872246da4SFelipe Balbi for (i = 0; i < num; i++) { 23972246da4SFelipe Balbi struct dwc3_event_buffer *evt; 24072246da4SFelipe Balbi 24172246da4SFelipe Balbi evt = dwc3_alloc_one_event_buffer(dwc, length); 24272246da4SFelipe Balbi if (IS_ERR(evt)) { 24372246da4SFelipe Balbi dev_err(dwc->dev, "can't allocate event buffer\n"); 24472246da4SFelipe Balbi return PTR_ERR(evt); 24572246da4SFelipe Balbi } 24672246da4SFelipe Balbi dwc->ev_buffs[i] = evt; 24772246da4SFelipe Balbi } 24872246da4SFelipe Balbi 24972246da4SFelipe Balbi return 0; 25072246da4SFelipe Balbi } 25172246da4SFelipe Balbi 25272246da4SFelipe Balbi /** 25372246da4SFelipe Balbi * dwc3_event_buffers_setup - setup our allocated event buffers 2541d046793SPaul Zimmerman * @dwc: pointer to our controller context structure 25572246da4SFelipe Balbi * 25672246da4SFelipe Balbi * Returns 0 on success otherwise negative errno. 25772246da4SFelipe Balbi */ 25872246da4SFelipe Balbi static int __devinit dwc3_event_buffers_setup(struct dwc3 *dwc) 25972246da4SFelipe Balbi { 26072246da4SFelipe Balbi struct dwc3_event_buffer *evt; 26172246da4SFelipe Balbi int n; 26272246da4SFelipe Balbi 2639f622b2aSFelipe Balbi for (n = 0; n < dwc->num_event_buffers; n++) { 26472246da4SFelipe Balbi evt = dwc->ev_buffs[n]; 26572246da4SFelipe Balbi dev_dbg(dwc->dev, "Event buf %p dma %08llx length %d\n", 26672246da4SFelipe Balbi evt->buf, (unsigned long long) evt->dma, 26772246da4SFelipe Balbi evt->length); 26872246da4SFelipe Balbi 26972246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(n), 27072246da4SFelipe Balbi lower_32_bits(evt->dma)); 27172246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(n), 27272246da4SFelipe Balbi upper_32_bits(evt->dma)); 27372246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(n), 27472246da4SFelipe Balbi evt->length & 0xffff); 27572246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(n), 0); 27672246da4SFelipe Balbi } 27772246da4SFelipe Balbi 27872246da4SFelipe Balbi return 0; 27972246da4SFelipe Balbi } 28072246da4SFelipe Balbi 28172246da4SFelipe Balbi static void dwc3_event_buffers_cleanup(struct dwc3 *dwc) 28272246da4SFelipe Balbi { 28372246da4SFelipe Balbi struct dwc3_event_buffer *evt; 28472246da4SFelipe Balbi int n; 28572246da4SFelipe Balbi 2869f622b2aSFelipe Balbi for (n = 0; n < dwc->num_event_buffers; n++) { 28772246da4SFelipe Balbi evt = dwc->ev_buffs[n]; 28872246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(n), 0); 28972246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(n), 0); 29072246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(n), 0); 29172246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(n), 0); 29272246da4SFelipe Balbi } 29372246da4SFelipe Balbi } 29472246da4SFelipe Balbi 29526ceca97SFelipe Balbi static void __devinit dwc3_cache_hwparams(struct dwc3 *dwc) 29626ceca97SFelipe Balbi { 29726ceca97SFelipe Balbi struct dwc3_hwparams *parms = &dwc->hwparams; 29826ceca97SFelipe Balbi 29926ceca97SFelipe Balbi parms->hwparams0 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS0); 30026ceca97SFelipe Balbi parms->hwparams1 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS1); 30126ceca97SFelipe Balbi parms->hwparams2 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS2); 30226ceca97SFelipe Balbi parms->hwparams3 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS3); 30326ceca97SFelipe Balbi parms->hwparams4 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS4); 30426ceca97SFelipe Balbi parms->hwparams5 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS5); 30526ceca97SFelipe Balbi parms->hwparams6 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS6); 30626ceca97SFelipe Balbi parms->hwparams7 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS7); 30726ceca97SFelipe Balbi parms->hwparams8 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS8); 30826ceca97SFelipe Balbi } 30926ceca97SFelipe Balbi 31072246da4SFelipe Balbi /** 31172246da4SFelipe Balbi * dwc3_core_init - Low-level initialization of DWC3 Core 31272246da4SFelipe Balbi * @dwc: Pointer to our controller context structure 31372246da4SFelipe Balbi * 31472246da4SFelipe Balbi * Returns 0 on success otherwise negative errno. 31572246da4SFelipe Balbi */ 31672246da4SFelipe Balbi static int __devinit dwc3_core_init(struct dwc3 *dwc) 31772246da4SFelipe Balbi { 31872246da4SFelipe Balbi unsigned long timeout; 31972246da4SFelipe Balbi u32 reg; 32072246da4SFelipe Balbi int ret; 32172246da4SFelipe Balbi 3227650bd74SSebastian Andrzej Siewior reg = dwc3_readl(dwc->regs, DWC3_GSNPSID); 3237650bd74SSebastian Andrzej Siewior /* This should read as U3 followed by revision number */ 3247650bd74SSebastian Andrzej Siewior if ((reg & DWC3_GSNPSID_MASK) != 0x55330000) { 3257650bd74SSebastian Andrzej Siewior dev_err(dwc->dev, "this is not a DesignWare USB3 DRD Core\n"); 3267650bd74SSebastian Andrzej Siewior ret = -ENODEV; 3277650bd74SSebastian Andrzej Siewior goto err0; 3287650bd74SSebastian Andrzej Siewior } 329248b122bSFelipe Balbi dwc->revision = reg; 3307650bd74SSebastian Andrzej Siewior 33172246da4SFelipe Balbi dwc3_core_soft_reset(dwc); 33272246da4SFelipe Balbi 33372246da4SFelipe Balbi /* issue device SoftReset too */ 33472246da4SFelipe Balbi timeout = jiffies + msecs_to_jiffies(500); 33572246da4SFelipe Balbi dwc3_writel(dwc->regs, DWC3_DCTL, DWC3_DCTL_CSFTRST); 33672246da4SFelipe Balbi do { 33772246da4SFelipe Balbi reg = dwc3_readl(dwc->regs, DWC3_DCTL); 33872246da4SFelipe Balbi if (!(reg & DWC3_DCTL_CSFTRST)) 33972246da4SFelipe Balbi break; 34072246da4SFelipe Balbi 34172246da4SFelipe Balbi if (time_after(jiffies, timeout)) { 34272246da4SFelipe Balbi dev_err(dwc->dev, "Reset Timed Out\n"); 34372246da4SFelipe Balbi ret = -ETIMEDOUT; 34472246da4SFelipe Balbi goto err0; 34572246da4SFelipe Balbi } 34672246da4SFelipe Balbi 34772246da4SFelipe Balbi cpu_relax(); 34872246da4SFelipe Balbi } while (true); 34972246da4SFelipe Balbi 3509f622b2aSFelipe Balbi dwc3_cache_hwparams(dwc); 3519f622b2aSFelipe Balbi 3524878a028SSebastian Andrzej Siewior reg = dwc3_readl(dwc->regs, DWC3_GCTL); 3533e87c42aSPaul Zimmerman reg &= ~DWC3_GCTL_SCALEDOWN_MASK; 3544878a028SSebastian Andrzej Siewior reg &= ~DWC3_GCTL_DISSCRAMBLE; 3554878a028SSebastian Andrzej Siewior 356164d7731SSebastian Andrzej Siewior switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams1)) { 3574878a028SSebastian Andrzej Siewior case DWC3_GHWPARAMS1_EN_PWROPT_CLK: 3584878a028SSebastian Andrzej Siewior reg &= ~DWC3_GCTL_DSBLCLKGTNG; 3594878a028SSebastian Andrzej Siewior break; 3604878a028SSebastian Andrzej Siewior default: 3614878a028SSebastian Andrzej Siewior dev_dbg(dwc->dev, "No power optimization available\n"); 3624878a028SSebastian Andrzej Siewior } 3634878a028SSebastian Andrzej Siewior 3644878a028SSebastian Andrzej Siewior /* 3654878a028SSebastian Andrzej Siewior * WORKAROUND: DWC3 revisions <1.90a have a bug 3661d046793SPaul Zimmerman * where the device can fail to connect at SuperSpeed 3674878a028SSebastian Andrzej Siewior * and falls back to high-speed mode which causes 3681d046793SPaul Zimmerman * the device to enter a Connect/Disconnect loop 3694878a028SSebastian Andrzej Siewior */ 3704878a028SSebastian Andrzej Siewior if (dwc->revision < DWC3_REVISION_190A) 3714878a028SSebastian Andrzej Siewior reg |= DWC3_GCTL_U2RSTECN; 3724878a028SSebastian Andrzej Siewior 3734878a028SSebastian Andrzej Siewior dwc3_writel(dwc->regs, DWC3_GCTL, reg); 3744878a028SSebastian Andrzej Siewior 3759f622b2aSFelipe Balbi ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE); 37672246da4SFelipe Balbi if (ret) { 37772246da4SFelipe Balbi dev_err(dwc->dev, "failed to allocate event buffers\n"); 37872246da4SFelipe Balbi ret = -ENOMEM; 37972246da4SFelipe Balbi goto err1; 38072246da4SFelipe Balbi } 38172246da4SFelipe Balbi 38272246da4SFelipe Balbi ret = dwc3_event_buffers_setup(dwc); 38372246da4SFelipe Balbi if (ret) { 38472246da4SFelipe Balbi dev_err(dwc->dev, "failed to setup event buffers\n"); 38572246da4SFelipe Balbi goto err1; 38672246da4SFelipe Balbi } 38772246da4SFelipe Balbi 38872246da4SFelipe Balbi return 0; 38972246da4SFelipe Balbi 39072246da4SFelipe Balbi err1: 39172246da4SFelipe Balbi dwc3_free_event_buffers(dwc); 39272246da4SFelipe Balbi 39372246da4SFelipe Balbi err0: 39472246da4SFelipe Balbi return ret; 39572246da4SFelipe Balbi } 39672246da4SFelipe Balbi 39772246da4SFelipe Balbi static void dwc3_core_exit(struct dwc3 *dwc) 39872246da4SFelipe Balbi { 39972246da4SFelipe Balbi dwc3_event_buffers_cleanup(dwc); 40072246da4SFelipe Balbi dwc3_free_event_buffers(dwc); 40172246da4SFelipe Balbi } 40272246da4SFelipe Balbi 40372246da4SFelipe Balbi #define DWC3_ALIGN_MASK (16 - 1) 40472246da4SFelipe Balbi 40572246da4SFelipe Balbi static int __devinit dwc3_probe(struct platform_device *pdev) 40672246da4SFelipe Balbi { 407457e84b6SFelipe Balbi struct device_node *node = pdev->dev.of_node; 40872246da4SFelipe Balbi struct resource *res; 40972246da4SFelipe Balbi struct dwc3 *dwc; 410802ca850SChanho Park struct device *dev = &pdev->dev; 4110949e99bSFelipe Balbi 41272246da4SFelipe Balbi int ret = -ENOMEM; 41372246da4SFelipe Balbi int irq; 4140949e99bSFelipe Balbi 4150949e99bSFelipe Balbi void __iomem *regs; 41672246da4SFelipe Balbi void *mem; 41772246da4SFelipe Balbi 4180949e99bSFelipe Balbi u8 mode; 4190949e99bSFelipe Balbi 420802ca850SChanho Park mem = devm_kzalloc(dev, sizeof(*dwc) + DWC3_ALIGN_MASK, GFP_KERNEL); 42172246da4SFelipe Balbi if (!mem) { 422802ca850SChanho Park dev_err(dev, "not enough memory\n"); 423802ca850SChanho Park return -ENOMEM; 42472246da4SFelipe Balbi } 42572246da4SFelipe Balbi dwc = PTR_ALIGN(mem, DWC3_ALIGN_MASK + 1); 42672246da4SFelipe Balbi dwc->mem = mem; 42772246da4SFelipe Balbi 42872246da4SFelipe Balbi res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 42972246da4SFelipe Balbi if (!res) { 430802ca850SChanho Park dev_err(dev, "missing resource\n"); 431802ca850SChanho Park return -ENODEV; 43272246da4SFelipe Balbi } 43372246da4SFelipe Balbi 434d07e8819SFelipe Balbi dwc->res = res; 435d07e8819SFelipe Balbi 436802ca850SChanho Park res = devm_request_mem_region(dev, res->start, resource_size(res), 437802ca850SChanho Park dev_name(dev)); 43872246da4SFelipe Balbi if (!res) { 439802ca850SChanho Park dev_err(dev, "can't request mem region\n"); 440802ca850SChanho Park return -ENOMEM; 44172246da4SFelipe Balbi } 44272246da4SFelipe Balbi 443802ca850SChanho Park regs = devm_ioremap(dev, res->start, resource_size(res)); 44472246da4SFelipe Balbi if (!regs) { 445802ca850SChanho Park dev_err(dev, "ioremap failed\n"); 446802ca850SChanho Park return -ENOMEM; 44772246da4SFelipe Balbi } 44872246da4SFelipe Balbi 44972246da4SFelipe Balbi irq = platform_get_irq(pdev, 0); 45072246da4SFelipe Balbi if (irq < 0) { 451802ca850SChanho Park dev_err(dev, "missing IRQ\n"); 452802ca850SChanho Park return -ENODEV; 45372246da4SFelipe Balbi } 45472246da4SFelipe Balbi 45572246da4SFelipe Balbi spin_lock_init(&dwc->lock); 45672246da4SFelipe Balbi platform_set_drvdata(pdev, dwc); 45772246da4SFelipe Balbi 45872246da4SFelipe Balbi dwc->regs = regs; 45972246da4SFelipe Balbi dwc->regs_size = resource_size(res); 460802ca850SChanho Park dwc->dev = dev; 46172246da4SFelipe Balbi dwc->irq = irq; 46272246da4SFelipe Balbi 4636c167fc9SFelipe Balbi if (!strncmp("super", maximum_speed, 5)) 4646c167fc9SFelipe Balbi dwc->maximum_speed = DWC3_DCFG_SUPERSPEED; 4656c167fc9SFelipe Balbi else if (!strncmp("high", maximum_speed, 4)) 4666c167fc9SFelipe Balbi dwc->maximum_speed = DWC3_DCFG_HIGHSPEED; 4676c167fc9SFelipe Balbi else if (!strncmp("full", maximum_speed, 4)) 4686c167fc9SFelipe Balbi dwc->maximum_speed = DWC3_DCFG_FULLSPEED1; 4696c167fc9SFelipe Balbi else if (!strncmp("low", maximum_speed, 3)) 4706c167fc9SFelipe Balbi dwc->maximum_speed = DWC3_DCFG_LOWSPEED; 4716c167fc9SFelipe Balbi else 4726c167fc9SFelipe Balbi dwc->maximum_speed = DWC3_DCFG_SUPERSPEED; 4736c167fc9SFelipe Balbi 474457e84b6SFelipe Balbi if (of_get_property(node, "tx-fifo-resize", NULL)) 475457e84b6SFelipe Balbi dwc->needs_fifo_resize = true; 476457e84b6SFelipe Balbi 477802ca850SChanho Park pm_runtime_enable(dev); 478802ca850SChanho Park pm_runtime_get_sync(dev); 479802ca850SChanho Park pm_runtime_forbid(dev); 48072246da4SFelipe Balbi 48172246da4SFelipe Balbi ret = dwc3_core_init(dwc); 48272246da4SFelipe Balbi if (ret) { 483802ca850SChanho Park dev_err(dev, "failed to initialize core\n"); 484802ca850SChanho Park return ret; 48572246da4SFelipe Balbi } 48672246da4SFelipe Balbi 4870949e99bSFelipe Balbi mode = DWC3_MODE(dwc->hwparams.hwparams0); 4880949e99bSFelipe Balbi 4890949e99bSFelipe Balbi switch (mode) { 4900949e99bSFelipe Balbi case DWC3_MODE_DEVICE: 4913140e8cbSSebastian Andrzej Siewior dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE); 49272246da4SFelipe Balbi ret = dwc3_gadget_init(dwc); 49372246da4SFelipe Balbi if (ret) { 494802ca850SChanho Park dev_err(dev, "failed to initialize gadget\n"); 495802ca850SChanho Park goto err1; 49672246da4SFelipe Balbi } 4970949e99bSFelipe Balbi break; 498d07e8819SFelipe Balbi case DWC3_MODE_HOST: 4993140e8cbSSebastian Andrzej Siewior dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_HOST); 500d07e8819SFelipe Balbi ret = dwc3_host_init(dwc); 501d07e8819SFelipe Balbi if (ret) { 502802ca850SChanho Park dev_err(dev, "failed to initialize host\n"); 503802ca850SChanho Park goto err1; 50472246da4SFelipe Balbi } 505d07e8819SFelipe Balbi break; 506d07e8819SFelipe Balbi case DWC3_MODE_DRD: 5073140e8cbSSebastian Andrzej Siewior dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_OTG); 508d07e8819SFelipe Balbi ret = dwc3_host_init(dwc); 509d07e8819SFelipe Balbi if (ret) { 510802ca850SChanho Park dev_err(dev, "failed to initialize host\n"); 511802ca850SChanho Park goto err1; 512d07e8819SFelipe Balbi } 513d07e8819SFelipe Balbi 514d07e8819SFelipe Balbi ret = dwc3_gadget_init(dwc); 515d07e8819SFelipe Balbi if (ret) { 516802ca850SChanho Park dev_err(dev, "failed to initialize gadget\n"); 517802ca850SChanho Park goto err1; 518d07e8819SFelipe Balbi } 519d07e8819SFelipe Balbi break; 5200949e99bSFelipe Balbi default: 521802ca850SChanho Park dev_err(dev, "Unsupported mode of operation %d\n", mode); 522802ca850SChanho Park goto err1; 52372246da4SFelipe Balbi } 5240949e99bSFelipe Balbi dwc->mode = mode; 52572246da4SFelipe Balbi 52672246da4SFelipe Balbi ret = dwc3_debugfs_init(dwc); 52772246da4SFelipe Balbi if (ret) { 528802ca850SChanho Park dev_err(dev, "failed to initialize debugfs\n"); 529802ca850SChanho Park goto err2; 53072246da4SFelipe Balbi } 53172246da4SFelipe Balbi 532802ca850SChanho Park pm_runtime_allow(dev); 53372246da4SFelipe Balbi 53472246da4SFelipe Balbi return 0; 53572246da4SFelipe Balbi 536802ca850SChanho Park err2: 5370949e99bSFelipe Balbi switch (mode) { 5380949e99bSFelipe Balbi case DWC3_MODE_DEVICE: 53972246da4SFelipe Balbi dwc3_gadget_exit(dwc); 5400949e99bSFelipe Balbi break; 541d07e8819SFelipe Balbi case DWC3_MODE_HOST: 542d07e8819SFelipe Balbi dwc3_host_exit(dwc); 543d07e8819SFelipe Balbi break; 544d07e8819SFelipe Balbi case DWC3_MODE_DRD: 545d07e8819SFelipe Balbi dwc3_host_exit(dwc); 546d07e8819SFelipe Balbi dwc3_gadget_exit(dwc); 547d07e8819SFelipe Balbi break; 5480949e99bSFelipe Balbi default: 5490949e99bSFelipe Balbi /* do nothing */ 5500949e99bSFelipe Balbi break; 5510949e99bSFelipe Balbi } 55272246da4SFelipe Balbi 553802ca850SChanho Park err1: 55472246da4SFelipe Balbi dwc3_core_exit(dwc); 55572246da4SFelipe Balbi 55672246da4SFelipe Balbi return ret; 55772246da4SFelipe Balbi } 55872246da4SFelipe Balbi 55972246da4SFelipe Balbi static int __devexit dwc3_remove(struct platform_device *pdev) 56072246da4SFelipe Balbi { 56172246da4SFelipe Balbi struct dwc3 *dwc = platform_get_drvdata(pdev); 56272246da4SFelipe Balbi struct resource *res; 56372246da4SFelipe Balbi 56472246da4SFelipe Balbi res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 56572246da4SFelipe Balbi 56672246da4SFelipe Balbi pm_runtime_put(&pdev->dev); 56772246da4SFelipe Balbi pm_runtime_disable(&pdev->dev); 56872246da4SFelipe Balbi 56972246da4SFelipe Balbi dwc3_debugfs_exit(dwc); 57072246da4SFelipe Balbi 5710949e99bSFelipe Balbi switch (dwc->mode) { 5720949e99bSFelipe Balbi case DWC3_MODE_DEVICE: 57372246da4SFelipe Balbi dwc3_gadget_exit(dwc); 5740949e99bSFelipe Balbi break; 575d07e8819SFelipe Balbi case DWC3_MODE_HOST: 576d07e8819SFelipe Balbi dwc3_host_exit(dwc); 577d07e8819SFelipe Balbi break; 578d07e8819SFelipe Balbi case DWC3_MODE_DRD: 579d07e8819SFelipe Balbi dwc3_host_exit(dwc); 580d07e8819SFelipe Balbi dwc3_gadget_exit(dwc); 581d07e8819SFelipe Balbi break; 5820949e99bSFelipe Balbi default: 5830949e99bSFelipe Balbi /* do nothing */ 5840949e99bSFelipe Balbi break; 5850949e99bSFelipe Balbi } 58672246da4SFelipe Balbi 58772246da4SFelipe Balbi dwc3_core_exit(dwc); 58872246da4SFelipe Balbi 58972246da4SFelipe Balbi return 0; 59072246da4SFelipe Balbi } 59172246da4SFelipe Balbi 59272246da4SFelipe Balbi static struct platform_driver dwc3_driver = { 59372246da4SFelipe Balbi .probe = dwc3_probe, 59472246da4SFelipe Balbi .remove = __devexit_p(dwc3_remove), 59572246da4SFelipe Balbi .driver = { 59672246da4SFelipe Balbi .name = "dwc3", 59772246da4SFelipe Balbi }, 59872246da4SFelipe Balbi }; 59972246da4SFelipe Balbi 600b1116dccSTobias Klauser module_platform_driver(dwc3_driver); 601b1116dccSTobias Klauser 6027ae4fc4dSSebastian Andrzej Siewior MODULE_ALIAS("platform:dwc3"); 60372246da4SFelipe Balbi MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); 60472246da4SFelipe Balbi MODULE_LICENSE("Dual BSD/GPL"); 60572246da4SFelipe Balbi MODULE_DESCRIPTION("DesignWare USB3 DRD Controller Driver"); 606