Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 1 | /** |
| 2 | * core.c - DesignWare USB3 DRD Controller Core file |
| 3 | * |
| 4 | * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 5 | * |
| 6 | * Authors: Felipe Balbi <balbi@ti.com>, |
| 7 | * Sebastian Andrzej Siewior <bigeasy@linutronix.de> |
| 8 | * |
| 9 | * Redistribution and use in source and binary forms, with or without |
| 10 | * modification, are permitted provided that the following conditions |
| 11 | * are met: |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions, and the following disclaimer, |
| 14 | * without modification. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * 3. The names of the above-listed copyright holders may not be used |
| 19 | * to endorse or promote products derived from this software without |
| 20 | * specific prior written permission. |
| 21 | * |
| 22 | * ALTERNATIVELY, this software may be distributed under the terms of the |
| 23 | * GNU General Public License ("GPL") version 2, as published by the Free |
| 24 | * Software Foundation. |
| 25 | * |
| 26 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| 27 | * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| 28 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 29 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| 30 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 31 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 32 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 33 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 34 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 35 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 36 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 37 | */ |
| 38 | |
Felipe Balbi | a72e658 | 2011-09-05 13:37:28 +0300 | [diff] [blame] | 39 | #include <linux/module.h> |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 40 | #include <linux/kernel.h> |
| 41 | #include <linux/slab.h> |
| 42 | #include <linux/spinlock.h> |
| 43 | #include <linux/platform_device.h> |
| 44 | #include <linux/pm_runtime.h> |
| 45 | #include <linux/interrupt.h> |
| 46 | #include <linux/ioport.h> |
| 47 | #include <linux/io.h> |
| 48 | #include <linux/list.h> |
| 49 | #include <linux/delay.h> |
| 50 | #include <linux/dma-mapping.h> |
Felipe Balbi | 457e84b | 2012-01-18 18:04:09 +0200 | [diff] [blame] | 51 | #include <linux/of.h> |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 52 | |
Felipe Balbi | 51e1e7b | 2012-07-19 14:09:48 +0300 | [diff] [blame] | 53 | #include <linux/usb/otg.h> |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 54 | #include <linux/usb/ch9.h> |
| 55 | #include <linux/usb/gadget.h> |
| 56 | |
| 57 | #include "core.h" |
| 58 | #include "gadget.h" |
| 59 | #include "io.h" |
| 60 | |
| 61 | #include "debug.h" |
| 62 | |
Felipe Balbi | 6c167fc | 2011-10-07 22:55:04 +0300 | [diff] [blame] | 63 | static char *maximum_speed = "super"; |
| 64 | module_param(maximum_speed, charp, 0); |
| 65 | MODULE_PARM_DESC(maximum_speed, "Maximum supported speed."); |
| 66 | |
Felipe Balbi | 8300dd2 | 2011-10-18 13:54:01 +0300 | [diff] [blame] | 67 | /* -------------------------------------------------------------------------- */ |
| 68 | |
Sebastian Andrzej Siewior | 3140e8c | 2011-10-31 22:25:40 +0100 | [diff] [blame] | 69 | void dwc3_set_mode(struct dwc3 *dwc, u32 mode) |
| 70 | { |
| 71 | u32 reg; |
| 72 | |
| 73 | reg = dwc3_readl(dwc->regs, DWC3_GCTL); |
| 74 | reg &= ~(DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_OTG)); |
| 75 | reg |= DWC3_GCTL_PRTCAPDIR(mode); |
| 76 | dwc3_writel(dwc->regs, DWC3_GCTL, reg); |
| 77 | } |
Felipe Balbi | 8300dd2 | 2011-10-18 13:54:01 +0300 | [diff] [blame] | 78 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 79 | /** |
| 80 | * dwc3_core_soft_reset - Issues core soft reset and PHY reset |
| 81 | * @dwc: pointer to our context structure |
| 82 | */ |
| 83 | static void dwc3_core_soft_reset(struct dwc3 *dwc) |
| 84 | { |
| 85 | u32 reg; |
| 86 | |
| 87 | /* Before Resetting PHY, put Core in Reset */ |
| 88 | reg = dwc3_readl(dwc->regs, DWC3_GCTL); |
| 89 | reg |= DWC3_GCTL_CORESOFTRESET; |
| 90 | dwc3_writel(dwc->regs, DWC3_GCTL, reg); |
| 91 | |
| 92 | /* Assert USB3 PHY reset */ |
| 93 | reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); |
| 94 | reg |= DWC3_GUSB3PIPECTL_PHYSOFTRST; |
| 95 | dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); |
| 96 | |
| 97 | /* Assert USB2 PHY reset */ |
| 98 | reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); |
| 99 | reg |= DWC3_GUSB2PHYCFG_PHYSOFTRST; |
| 100 | dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); |
| 101 | |
Felipe Balbi | 51e1e7b | 2012-07-19 14:09:48 +0300 | [diff] [blame] | 102 | usb_phy_init(dwc->usb2_phy); |
| 103 | usb_phy_init(dwc->usb3_phy); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 104 | mdelay(100); |
| 105 | |
| 106 | /* Clear USB3 PHY reset */ |
| 107 | reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); |
| 108 | reg &= ~DWC3_GUSB3PIPECTL_PHYSOFTRST; |
| 109 | dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); |
| 110 | |
| 111 | /* Clear USB2 PHY reset */ |
| 112 | reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); |
| 113 | reg &= ~DWC3_GUSB2PHYCFG_PHYSOFTRST; |
| 114 | dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); |
| 115 | |
Pratyush Anand | 45627ac | 2012-06-21 17:44:28 +0530 | [diff] [blame] | 116 | mdelay(100); |
| 117 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 118 | /* After PHYs are stable we can take Core out of reset state */ |
| 119 | reg = dwc3_readl(dwc->regs, DWC3_GCTL); |
| 120 | reg &= ~DWC3_GCTL_CORESOFTRESET; |
| 121 | dwc3_writel(dwc->regs, DWC3_GCTL, reg); |
| 122 | } |
| 123 | |
| 124 | /** |
| 125 | * dwc3_free_one_event_buffer - Frees one event buffer |
| 126 | * @dwc: Pointer to our controller context structure |
| 127 | * @evt: Pointer to event buffer to be freed |
| 128 | */ |
| 129 | static void dwc3_free_one_event_buffer(struct dwc3 *dwc, |
| 130 | struct dwc3_event_buffer *evt) |
| 131 | { |
| 132 | dma_free_coherent(dwc->dev, evt->length, evt->buf, evt->dma); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 133 | } |
| 134 | |
| 135 | /** |
Paul Zimmerman | 1d04679 | 2012-02-15 18:56:56 -0800 | [diff] [blame] | 136 | * dwc3_alloc_one_event_buffer - Allocates one event buffer structure |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 137 | * @dwc: Pointer to our controller context structure |
| 138 | * @length: size of the event buffer |
| 139 | * |
Paul Zimmerman | 1d04679 | 2012-02-15 18:56:56 -0800 | [diff] [blame] | 140 | * Returns a pointer to the allocated event buffer structure on success |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 141 | * otherwise ERR_PTR(errno). |
| 142 | */ |
Felipe Balbi | 67d0b50 | 2013-02-22 16:31:07 +0200 | [diff] [blame] | 143 | static struct dwc3_event_buffer *dwc3_alloc_one_event_buffer(struct dwc3 *dwc, |
| 144 | unsigned length) |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 145 | { |
| 146 | struct dwc3_event_buffer *evt; |
| 147 | |
Felipe Balbi | 380f0d2 | 2012-10-11 13:48:36 +0300 | [diff] [blame] | 148 | evt = devm_kzalloc(dwc->dev, sizeof(*evt), GFP_KERNEL); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 149 | if (!evt) |
| 150 | return ERR_PTR(-ENOMEM); |
| 151 | |
| 152 | evt->dwc = dwc; |
| 153 | evt->length = length; |
| 154 | evt->buf = dma_alloc_coherent(dwc->dev, length, |
| 155 | &evt->dma, GFP_KERNEL); |
Felipe Balbi | e32672f | 2012-11-08 15:26:41 +0200 | [diff] [blame] | 156 | if (!evt->buf) |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 157 | return ERR_PTR(-ENOMEM); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 158 | |
| 159 | return evt; |
| 160 | } |
| 161 | |
| 162 | /** |
| 163 | * dwc3_free_event_buffers - frees all allocated event buffers |
| 164 | * @dwc: Pointer to our controller context structure |
| 165 | */ |
| 166 | static void dwc3_free_event_buffers(struct dwc3 *dwc) |
| 167 | { |
| 168 | struct dwc3_event_buffer *evt; |
| 169 | int i; |
| 170 | |
Felipe Balbi | 9f622b2 | 2011-10-12 10:31:04 +0300 | [diff] [blame] | 171 | for (i = 0; i < dwc->num_event_buffers; i++) { |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 172 | evt = dwc->ev_buffs[i]; |
Anton Tikhomirov | 64b6c8a | 2012-03-06 17:05:15 +0900 | [diff] [blame] | 173 | if (evt) |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 174 | dwc3_free_one_event_buffer(dwc, evt); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 175 | } |
| 176 | } |
| 177 | |
| 178 | /** |
| 179 | * dwc3_alloc_event_buffers - Allocates @num event buffers of size @length |
Paul Zimmerman | 1d04679 | 2012-02-15 18:56:56 -0800 | [diff] [blame] | 180 | * @dwc: pointer to our controller context structure |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 181 | * @length: size of event buffer |
| 182 | * |
Paul Zimmerman | 1d04679 | 2012-02-15 18:56:56 -0800 | [diff] [blame] | 183 | * Returns 0 on success otherwise negative errno. In the error case, dwc |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 184 | * may contain some buffers allocated but not all which were requested. |
| 185 | */ |
Bill Pemberton | 41ac7b3 | 2012-11-19 13:21:48 -0500 | [diff] [blame] | 186 | static int dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned length) |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 187 | { |
Felipe Balbi | 9f622b2 | 2011-10-12 10:31:04 +0300 | [diff] [blame] | 188 | int num; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 189 | int i; |
| 190 | |
Felipe Balbi | 9f622b2 | 2011-10-12 10:31:04 +0300 | [diff] [blame] | 191 | num = DWC3_NUM_INT(dwc->hwparams.hwparams1); |
| 192 | dwc->num_event_buffers = num; |
| 193 | |
Felipe Balbi | 380f0d2 | 2012-10-11 13:48:36 +0300 | [diff] [blame] | 194 | dwc->ev_buffs = devm_kzalloc(dwc->dev, sizeof(*dwc->ev_buffs) * num, |
| 195 | GFP_KERNEL); |
Felipe Balbi | 457d3f2 | 2011-10-24 12:03:13 +0300 | [diff] [blame] | 196 | if (!dwc->ev_buffs) { |
| 197 | dev_err(dwc->dev, "can't allocate event buffers array\n"); |
| 198 | return -ENOMEM; |
| 199 | } |
| 200 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 201 | for (i = 0; i < num; i++) { |
| 202 | struct dwc3_event_buffer *evt; |
| 203 | |
| 204 | evt = dwc3_alloc_one_event_buffer(dwc, length); |
| 205 | if (IS_ERR(evt)) { |
| 206 | dev_err(dwc->dev, "can't allocate event buffer\n"); |
| 207 | return PTR_ERR(evt); |
| 208 | } |
| 209 | dwc->ev_buffs[i] = evt; |
| 210 | } |
| 211 | |
| 212 | return 0; |
| 213 | } |
| 214 | |
| 215 | /** |
| 216 | * dwc3_event_buffers_setup - setup our allocated event buffers |
Paul Zimmerman | 1d04679 | 2012-02-15 18:56:56 -0800 | [diff] [blame] | 217 | * @dwc: pointer to our controller context structure |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 218 | * |
| 219 | * Returns 0 on success otherwise negative errno. |
| 220 | */ |
Paul Zimmerman | 7acd85e | 2012-04-27 14:28:02 +0300 | [diff] [blame] | 221 | static int dwc3_event_buffers_setup(struct dwc3 *dwc) |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 222 | { |
| 223 | struct dwc3_event_buffer *evt; |
| 224 | int n; |
| 225 | |
Felipe Balbi | 9f622b2 | 2011-10-12 10:31:04 +0300 | [diff] [blame] | 226 | for (n = 0; n < dwc->num_event_buffers; n++) { |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 227 | evt = dwc->ev_buffs[n]; |
| 228 | dev_dbg(dwc->dev, "Event buf %p dma %08llx length %d\n", |
| 229 | evt->buf, (unsigned long long) evt->dma, |
| 230 | evt->length); |
| 231 | |
Paul Zimmerman | 7acd85e | 2012-04-27 14:28:02 +0300 | [diff] [blame] | 232 | evt->lpos = 0; |
| 233 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 234 | dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(n), |
| 235 | lower_32_bits(evt->dma)); |
| 236 | dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(n), |
| 237 | upper_32_bits(evt->dma)); |
| 238 | dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(n), |
| 239 | evt->length & 0xffff); |
| 240 | dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(n), 0); |
| 241 | } |
| 242 | |
| 243 | return 0; |
| 244 | } |
| 245 | |
| 246 | static void dwc3_event_buffers_cleanup(struct dwc3 *dwc) |
| 247 | { |
| 248 | struct dwc3_event_buffer *evt; |
| 249 | int n; |
| 250 | |
Felipe Balbi | 9f622b2 | 2011-10-12 10:31:04 +0300 | [diff] [blame] | 251 | for (n = 0; n < dwc->num_event_buffers; n++) { |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 252 | evt = dwc->ev_buffs[n]; |
Paul Zimmerman | 7acd85e | 2012-04-27 14:28:02 +0300 | [diff] [blame] | 253 | |
| 254 | evt->lpos = 0; |
| 255 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 256 | dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(n), 0); |
| 257 | dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(n), 0); |
| 258 | dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(n), 0); |
| 259 | dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(n), 0); |
| 260 | } |
| 261 | } |
| 262 | |
Felipe Balbi | 789451f6 | 2011-05-05 15:53:10 +0300 | [diff] [blame] | 263 | static void dwc3_core_num_eps(struct dwc3 *dwc) |
| 264 | { |
| 265 | struct dwc3_hwparams *parms = &dwc->hwparams; |
| 266 | |
| 267 | dwc->num_in_eps = DWC3_NUM_IN_EPS(parms); |
| 268 | dwc->num_out_eps = DWC3_NUM_EPS(parms) - dwc->num_in_eps; |
| 269 | |
| 270 | dev_vdbg(dwc->dev, "found %d IN and %d OUT endpoints\n", |
| 271 | dwc->num_in_eps, dwc->num_out_eps); |
| 272 | } |
| 273 | |
Bill Pemberton | 41ac7b3 | 2012-11-19 13:21:48 -0500 | [diff] [blame] | 274 | static void dwc3_cache_hwparams(struct dwc3 *dwc) |
Felipe Balbi | 26ceca9 | 2011-09-30 10:58:49 +0300 | [diff] [blame] | 275 | { |
| 276 | struct dwc3_hwparams *parms = &dwc->hwparams; |
| 277 | |
| 278 | parms->hwparams0 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS0); |
| 279 | parms->hwparams1 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS1); |
| 280 | parms->hwparams2 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS2); |
| 281 | parms->hwparams3 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS3); |
| 282 | parms->hwparams4 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS4); |
| 283 | parms->hwparams5 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS5); |
| 284 | parms->hwparams6 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS6); |
| 285 | parms->hwparams7 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS7); |
| 286 | parms->hwparams8 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS8); |
| 287 | } |
| 288 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 289 | /** |
| 290 | * dwc3_core_init - Low-level initialization of DWC3 Core |
| 291 | * @dwc: Pointer to our controller context structure |
| 292 | * |
| 293 | * Returns 0 on success otherwise negative errno. |
| 294 | */ |
Bill Pemberton | 41ac7b3 | 2012-11-19 13:21:48 -0500 | [diff] [blame] | 295 | static int dwc3_core_init(struct dwc3 *dwc) |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 296 | { |
| 297 | unsigned long timeout; |
| 298 | u32 reg; |
| 299 | int ret; |
| 300 | |
Sebastian Andrzej Siewior | 7650bd7 | 2011-08-29 13:56:36 +0200 | [diff] [blame] | 301 | reg = dwc3_readl(dwc->regs, DWC3_GSNPSID); |
| 302 | /* This should read as U3 followed by revision number */ |
| 303 | if ((reg & DWC3_GSNPSID_MASK) != 0x55330000) { |
| 304 | dev_err(dwc->dev, "this is not a DesignWare USB3 DRD Core\n"); |
| 305 | ret = -ENODEV; |
| 306 | goto err0; |
| 307 | } |
Felipe Balbi | 248b122 | 2011-12-14 21:59:30 +0200 | [diff] [blame] | 308 | dwc->revision = reg; |
Sebastian Andrzej Siewior | 7650bd7 | 2011-08-29 13:56:36 +0200 | [diff] [blame] | 309 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 310 | /* issue device SoftReset too */ |
| 311 | timeout = jiffies + msecs_to_jiffies(500); |
| 312 | dwc3_writel(dwc->regs, DWC3_DCTL, DWC3_DCTL_CSFTRST); |
| 313 | do { |
| 314 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); |
| 315 | if (!(reg & DWC3_DCTL_CSFTRST)) |
| 316 | break; |
| 317 | |
| 318 | if (time_after(jiffies, timeout)) { |
| 319 | dev_err(dwc->dev, "Reset Timed Out\n"); |
| 320 | ret = -ETIMEDOUT; |
| 321 | goto err0; |
| 322 | } |
| 323 | |
| 324 | cpu_relax(); |
| 325 | } while (true); |
| 326 | |
Pratyush Anand | 58a0f23 | 2012-06-21 17:44:29 +0530 | [diff] [blame] | 327 | dwc3_core_soft_reset(dwc); |
| 328 | |
Sebastian Andrzej Siewior | 4878a02 | 2011-10-31 22:25:41 +0100 | [diff] [blame] | 329 | reg = dwc3_readl(dwc->regs, DWC3_GCTL); |
Paul Zimmerman | 3e87c42 | 2012-02-24 17:32:13 -0800 | [diff] [blame] | 330 | reg &= ~DWC3_GCTL_SCALEDOWN_MASK; |
Sebastian Andrzej Siewior | 4878a02 | 2011-10-31 22:25:41 +0100 | [diff] [blame] | 331 | reg &= ~DWC3_GCTL_DISSCRAMBLE; |
| 332 | |
Sebastian Andrzej Siewior | 164d773 | 2011-11-24 11:22:05 +0100 | [diff] [blame] | 333 | switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams1)) { |
Sebastian Andrzej Siewior | 4878a02 | 2011-10-31 22:25:41 +0100 | [diff] [blame] | 334 | case DWC3_GHWPARAMS1_EN_PWROPT_CLK: |
| 335 | reg &= ~DWC3_GCTL_DSBLCLKGTNG; |
| 336 | break; |
| 337 | default: |
| 338 | dev_dbg(dwc->dev, "No power optimization available\n"); |
| 339 | } |
| 340 | |
| 341 | /* |
| 342 | * WORKAROUND: DWC3 revisions <1.90a have a bug |
Paul Zimmerman | 1d04679 | 2012-02-15 18:56:56 -0800 | [diff] [blame] | 343 | * where the device can fail to connect at SuperSpeed |
Sebastian Andrzej Siewior | 4878a02 | 2011-10-31 22:25:41 +0100 | [diff] [blame] | 344 | * and falls back to high-speed mode which causes |
Paul Zimmerman | 1d04679 | 2012-02-15 18:56:56 -0800 | [diff] [blame] | 345 | * the device to enter a Connect/Disconnect loop |
Sebastian Andrzej Siewior | 4878a02 | 2011-10-31 22:25:41 +0100 | [diff] [blame] | 346 | */ |
| 347 | if (dwc->revision < DWC3_REVISION_190A) |
| 348 | reg |= DWC3_GCTL_U2RSTECN; |
| 349 | |
Felipe Balbi | 789451f6 | 2011-05-05 15:53:10 +0300 | [diff] [blame] | 350 | dwc3_core_num_eps(dwc); |
| 351 | |
Sebastian Andrzej Siewior | 4878a02 | 2011-10-31 22:25:41 +0100 | [diff] [blame] | 352 | dwc3_writel(dwc->regs, DWC3_GCTL, reg); |
| 353 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 354 | return 0; |
| 355 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 356 | err0: |
| 357 | return ret; |
| 358 | } |
| 359 | |
| 360 | static void dwc3_core_exit(struct dwc3 *dwc) |
| 361 | { |
Vivek Gautam | 01b8daf | 2012-10-13 19:20:18 +0530 | [diff] [blame] | 362 | usb_phy_shutdown(dwc->usb2_phy); |
| 363 | usb_phy_shutdown(dwc->usb3_phy); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 364 | } |
| 365 | |
| 366 | #define DWC3_ALIGN_MASK (16 - 1) |
| 367 | |
Bill Pemberton | 41ac7b3 | 2012-11-19 13:21:48 -0500 | [diff] [blame] | 368 | static int dwc3_probe(struct platform_device *pdev) |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 369 | { |
Felipe Balbi | 457e84b | 2012-01-18 18:04:09 +0200 | [diff] [blame] | 370 | struct device_node *node = pdev->dev.of_node; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 371 | struct resource *res; |
| 372 | struct dwc3 *dwc; |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 373 | struct device *dev = &pdev->dev; |
Felipe Balbi | 0949e99 | 2011-10-12 10:44:56 +0300 | [diff] [blame] | 374 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 375 | int ret = -ENOMEM; |
Felipe Balbi | 0949e99 | 2011-10-12 10:44:56 +0300 | [diff] [blame] | 376 | |
| 377 | void __iomem *regs; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 378 | void *mem; |
| 379 | |
Felipe Balbi | 0949e99 | 2011-10-12 10:44:56 +0300 | [diff] [blame] | 380 | u8 mode; |
| 381 | |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 382 | mem = devm_kzalloc(dev, sizeof(*dwc) + DWC3_ALIGN_MASK, GFP_KERNEL); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 383 | if (!mem) { |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 384 | dev_err(dev, "not enough memory\n"); |
| 385 | return -ENOMEM; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 386 | } |
| 387 | dwc = PTR_ALIGN(mem, DWC3_ALIGN_MASK + 1); |
| 388 | dwc->mem = mem; |
| 389 | |
Ido Shayevitz | 51249dc | 2012-04-24 14:18:39 +0300 | [diff] [blame] | 390 | res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 391 | if (!res) { |
Ido Shayevitz | 51249dc | 2012-04-24 14:18:39 +0300 | [diff] [blame] | 392 | dev_err(dev, "missing IRQ\n"); |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 393 | return -ENODEV; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 394 | } |
Kishon Vijay Abraham I | 066618b | 2012-08-21 14:56:16 +0530 | [diff] [blame] | 395 | dwc->xhci_resources[1].start = res->start; |
| 396 | dwc->xhci_resources[1].end = res->end; |
| 397 | dwc->xhci_resources[1].flags = res->flags; |
| 398 | dwc->xhci_resources[1].name = res->name; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 399 | |
Ido Shayevitz | 51249dc | 2012-04-24 14:18:39 +0300 | [diff] [blame] | 400 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 401 | if (!res) { |
| 402 | dev_err(dev, "missing memory resource\n"); |
| 403 | return -ENODEV; |
| 404 | } |
Kishon Vijay Abraham I | 066618b | 2012-08-21 14:56:16 +0530 | [diff] [blame] | 405 | dwc->xhci_resources[0].start = res->start; |
Ido Shayevitz | 51249dc | 2012-04-24 14:18:39 +0300 | [diff] [blame] | 406 | dwc->xhci_resources[0].end = dwc->xhci_resources[0].start + |
| 407 | DWC3_XHCI_REGS_END; |
Kishon Vijay Abraham I | 066618b | 2012-08-21 14:56:16 +0530 | [diff] [blame] | 408 | dwc->xhci_resources[0].flags = res->flags; |
| 409 | dwc->xhci_resources[0].name = res->name; |
Felipe Balbi | d07e881 | 2011-10-12 14:08:26 +0300 | [diff] [blame] | 410 | |
Ido Shayevitz | 51249dc | 2012-04-24 14:18:39 +0300 | [diff] [blame] | 411 | /* |
| 412 | * Request memory region but exclude xHCI regs, |
| 413 | * since it will be requested by the xhci-plat driver. |
| 414 | */ |
| 415 | res = devm_request_mem_region(dev, res->start + DWC3_GLOBALS_REGS_START, |
| 416 | resource_size(res) - DWC3_GLOBALS_REGS_START, |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 417 | dev_name(dev)); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 418 | if (!res) { |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 419 | dev_err(dev, "can't request mem region\n"); |
| 420 | return -ENOMEM; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 421 | } |
| 422 | |
Felipe Balbi | b7e38aa | 2012-08-10 09:16:43 +0300 | [diff] [blame] | 423 | regs = devm_ioremap_nocache(dev, res->start, resource_size(res)); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 424 | if (!regs) { |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 425 | dev_err(dev, "ioremap failed\n"); |
| 426 | return -ENOMEM; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 427 | } |
| 428 | |
Kishon Vijay Abraham I | 5088b6f | 2013-01-25 16:36:53 +0530 | [diff] [blame] | 429 | if (node) { |
| 430 | dwc->usb2_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 0); |
| 431 | dwc->usb3_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 1); |
| 432 | } else { |
| 433 | dwc->usb2_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2); |
| 434 | dwc->usb3_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB3); |
| 435 | } |
| 436 | |
Felipe Balbi | d105e7f | 2013-03-15 10:52:08 +0200 | [diff] [blame^] | 437 | if (IS_ERR(dwc->usb2_phy)) { |
| 438 | ret = PTR_ERR(dwc->usb2_phy); |
| 439 | |
| 440 | /* |
| 441 | * if -ENXIO is returned, it means PHY layer wasn't |
| 442 | * enabled, so it makes no sense to return -EPROBE_DEFER |
| 443 | * in that case, since no PHY driver will ever probe. |
| 444 | */ |
| 445 | if (ret == -ENXIO) |
| 446 | return ret; |
| 447 | |
Felipe Balbi | 51e1e7b | 2012-07-19 14:09:48 +0300 | [diff] [blame] | 448 | dev_err(dev, "no usb2 phy configured\n"); |
| 449 | return -EPROBE_DEFER; |
| 450 | } |
| 451 | |
Felipe Balbi | d105e7f | 2013-03-15 10:52:08 +0200 | [diff] [blame^] | 452 | if (IS_ERR(dwc->usb3_phy)) { |
| 453 | ret = PTR_ERR(dwc->usb2_phy); |
| 454 | |
| 455 | /* |
| 456 | * if -ENXIO is returned, it means PHY layer wasn't |
| 457 | * enabled, so it makes no sense to return -EPROBE_DEFER |
| 458 | * in that case, since no PHY driver will ever probe. |
| 459 | */ |
| 460 | if (ret == -ENXIO) |
| 461 | return ret; |
| 462 | |
Felipe Balbi | 51e1e7b | 2012-07-19 14:09:48 +0300 | [diff] [blame] | 463 | dev_err(dev, "no usb3 phy configured\n"); |
| 464 | return -EPROBE_DEFER; |
| 465 | } |
| 466 | |
Kishon Vijay Abraham I | 8ba007a | 2013-01-25 08:30:54 +0530 | [diff] [blame] | 467 | usb_phy_set_suspend(dwc->usb2_phy, 0); |
| 468 | usb_phy_set_suspend(dwc->usb3_phy, 0); |
| 469 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 470 | spin_lock_init(&dwc->lock); |
| 471 | platform_set_drvdata(pdev, dwc); |
| 472 | |
| 473 | dwc->regs = regs; |
| 474 | dwc->regs_size = resource_size(res); |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 475 | dwc->dev = dev; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 476 | |
Kishon Vijay Abraham I | ddff14f | 2013-03-07 18:51:43 +0530 | [diff] [blame] | 477 | dev->dma_mask = dev->parent->dma_mask; |
| 478 | dev->dma_parms = dev->parent->dma_parms; |
| 479 | dma_set_coherent_mask(dev, dev->parent->coherent_dma_mask); |
| 480 | |
Felipe Balbi | 6c167fc | 2011-10-07 22:55:04 +0300 | [diff] [blame] | 481 | if (!strncmp("super", maximum_speed, 5)) |
| 482 | dwc->maximum_speed = DWC3_DCFG_SUPERSPEED; |
| 483 | else if (!strncmp("high", maximum_speed, 4)) |
| 484 | dwc->maximum_speed = DWC3_DCFG_HIGHSPEED; |
| 485 | else if (!strncmp("full", maximum_speed, 4)) |
| 486 | dwc->maximum_speed = DWC3_DCFG_FULLSPEED1; |
| 487 | else if (!strncmp("low", maximum_speed, 3)) |
| 488 | dwc->maximum_speed = DWC3_DCFG_LOWSPEED; |
| 489 | else |
| 490 | dwc->maximum_speed = DWC3_DCFG_SUPERSPEED; |
| 491 | |
Kishon Vijay Abraham I | 5088b6f | 2013-01-25 16:36:53 +0530 | [diff] [blame] | 492 | dwc->needs_fifo_resize = of_property_read_bool(node, "tx-fifo-resize"); |
Felipe Balbi | 457e84b | 2012-01-18 18:04:09 +0200 | [diff] [blame] | 493 | |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 494 | pm_runtime_enable(dev); |
| 495 | pm_runtime_get_sync(dev); |
| 496 | pm_runtime_forbid(dev); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 497 | |
Kishon Vijay Abraham I | 4fd2448 | 2012-11-16 12:07:54 +0530 | [diff] [blame] | 498 | dwc3_cache_hwparams(dwc); |
| 499 | |
Felipe Balbi | 3921426 | 2012-10-11 13:54:36 +0300 | [diff] [blame] | 500 | ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE); |
| 501 | if (ret) { |
| 502 | dev_err(dwc->dev, "failed to allocate event buffers\n"); |
| 503 | ret = -ENOMEM; |
| 504 | goto err0; |
| 505 | } |
| 506 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 507 | ret = dwc3_core_init(dwc); |
| 508 | if (ret) { |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 509 | dev_err(dev, "failed to initialize core\n"); |
Felipe Balbi | 3921426 | 2012-10-11 13:54:36 +0300 | [diff] [blame] | 510 | goto err0; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 511 | } |
| 512 | |
Felipe Balbi | f122d33 | 2013-02-08 15:15:11 +0200 | [diff] [blame] | 513 | ret = dwc3_event_buffers_setup(dwc); |
| 514 | if (ret) { |
| 515 | dev_err(dwc->dev, "failed to setup event buffers\n"); |
| 516 | goto err1; |
| 517 | } |
| 518 | |
Vivek Gautam | cd051da | 2013-03-02 18:55:24 +0530 | [diff] [blame] | 519 | if (IS_ENABLED(CONFIG_USB_DWC3_HOST)) |
| 520 | mode = DWC3_MODE_HOST; |
| 521 | else if (IS_ENABLED(CONFIG_USB_DWC3_GADGET)) |
| 522 | mode = DWC3_MODE_DEVICE; |
| 523 | else |
| 524 | mode = DWC3_MODE_DRD; |
Felipe Balbi | 0949e99 | 2011-10-12 10:44:56 +0300 | [diff] [blame] | 525 | |
| 526 | switch (mode) { |
Felipe Balbi | 0949e99 | 2011-10-12 10:44:56 +0300 | [diff] [blame] | 527 | case DWC3_MODE_DEVICE: |
Sebastian Andrzej Siewior | 3140e8c | 2011-10-31 22:25:40 +0100 | [diff] [blame] | 528 | dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 529 | ret = dwc3_gadget_init(dwc); |
| 530 | if (ret) { |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 531 | dev_err(dev, "failed to initialize gadget\n"); |
Felipe Balbi | f122d33 | 2013-02-08 15:15:11 +0200 | [diff] [blame] | 532 | goto err2; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 533 | } |
Felipe Balbi | 0949e99 | 2011-10-12 10:44:56 +0300 | [diff] [blame] | 534 | break; |
Felipe Balbi | d07e881 | 2011-10-12 14:08:26 +0300 | [diff] [blame] | 535 | case DWC3_MODE_HOST: |
Sebastian Andrzej Siewior | 3140e8c | 2011-10-31 22:25:40 +0100 | [diff] [blame] | 536 | dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_HOST); |
Felipe Balbi | d07e881 | 2011-10-12 14:08:26 +0300 | [diff] [blame] | 537 | ret = dwc3_host_init(dwc); |
| 538 | if (ret) { |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 539 | dev_err(dev, "failed to initialize host\n"); |
Felipe Balbi | f122d33 | 2013-02-08 15:15:11 +0200 | [diff] [blame] | 540 | goto err2; |
Felipe Balbi | d07e881 | 2011-10-12 14:08:26 +0300 | [diff] [blame] | 541 | } |
| 542 | break; |
| 543 | case DWC3_MODE_DRD: |
Sebastian Andrzej Siewior | 3140e8c | 2011-10-31 22:25:40 +0100 | [diff] [blame] | 544 | dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_OTG); |
Felipe Balbi | d07e881 | 2011-10-12 14:08:26 +0300 | [diff] [blame] | 545 | ret = dwc3_host_init(dwc); |
| 546 | if (ret) { |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 547 | dev_err(dev, "failed to initialize host\n"); |
Felipe Balbi | f122d33 | 2013-02-08 15:15:11 +0200 | [diff] [blame] | 548 | goto err2; |
Felipe Balbi | d07e881 | 2011-10-12 14:08:26 +0300 | [diff] [blame] | 549 | } |
| 550 | |
| 551 | ret = dwc3_gadget_init(dwc); |
| 552 | if (ret) { |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 553 | dev_err(dev, "failed to initialize gadget\n"); |
Felipe Balbi | f122d33 | 2013-02-08 15:15:11 +0200 | [diff] [blame] | 554 | goto err2; |
Felipe Balbi | d07e881 | 2011-10-12 14:08:26 +0300 | [diff] [blame] | 555 | } |
| 556 | break; |
Felipe Balbi | 0949e99 | 2011-10-12 10:44:56 +0300 | [diff] [blame] | 557 | default: |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 558 | dev_err(dev, "Unsupported mode of operation %d\n", mode); |
Felipe Balbi | f122d33 | 2013-02-08 15:15:11 +0200 | [diff] [blame] | 559 | goto err2; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 560 | } |
Felipe Balbi | 0949e99 | 2011-10-12 10:44:56 +0300 | [diff] [blame] | 561 | dwc->mode = mode; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 562 | |
| 563 | ret = dwc3_debugfs_init(dwc); |
| 564 | if (ret) { |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 565 | dev_err(dev, "failed to initialize debugfs\n"); |
Felipe Balbi | f122d33 | 2013-02-08 15:15:11 +0200 | [diff] [blame] | 566 | goto err3; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 567 | } |
| 568 | |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 569 | pm_runtime_allow(dev); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 570 | |
| 571 | return 0; |
| 572 | |
Felipe Balbi | f122d33 | 2013-02-08 15:15:11 +0200 | [diff] [blame] | 573 | err3: |
Felipe Balbi | 0949e99 | 2011-10-12 10:44:56 +0300 | [diff] [blame] | 574 | switch (mode) { |
Felipe Balbi | 0949e99 | 2011-10-12 10:44:56 +0300 | [diff] [blame] | 575 | case DWC3_MODE_DEVICE: |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 576 | dwc3_gadget_exit(dwc); |
Felipe Balbi | 0949e99 | 2011-10-12 10:44:56 +0300 | [diff] [blame] | 577 | break; |
Felipe Balbi | d07e881 | 2011-10-12 14:08:26 +0300 | [diff] [blame] | 578 | case DWC3_MODE_HOST: |
| 579 | dwc3_host_exit(dwc); |
| 580 | break; |
| 581 | case DWC3_MODE_DRD: |
| 582 | dwc3_host_exit(dwc); |
| 583 | dwc3_gadget_exit(dwc); |
| 584 | break; |
Felipe Balbi | 0949e99 | 2011-10-12 10:44:56 +0300 | [diff] [blame] | 585 | default: |
| 586 | /* do nothing */ |
| 587 | break; |
| 588 | } |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 589 | |
Felipe Balbi | f122d33 | 2013-02-08 15:15:11 +0200 | [diff] [blame] | 590 | err2: |
| 591 | dwc3_event_buffers_cleanup(dwc); |
| 592 | |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 593 | err1: |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 594 | dwc3_core_exit(dwc); |
| 595 | |
Felipe Balbi | 3921426 | 2012-10-11 13:54:36 +0300 | [diff] [blame] | 596 | err0: |
| 597 | dwc3_free_event_buffers(dwc); |
| 598 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 599 | return ret; |
| 600 | } |
| 601 | |
Bill Pemberton | fb4e98a | 2012-11-19 13:26:20 -0500 | [diff] [blame] | 602 | static int dwc3_remove(struct platform_device *pdev) |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 603 | { |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 604 | struct dwc3 *dwc = platform_get_drvdata(pdev); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 605 | |
Kishon Vijay Abraham I | 8ba007a | 2013-01-25 08:30:54 +0530 | [diff] [blame] | 606 | usb_phy_set_suspend(dwc->usb2_phy, 1); |
| 607 | usb_phy_set_suspend(dwc->usb3_phy, 1); |
| 608 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 609 | pm_runtime_put(&pdev->dev); |
| 610 | pm_runtime_disable(&pdev->dev); |
| 611 | |
| 612 | dwc3_debugfs_exit(dwc); |
| 613 | |
Felipe Balbi | 0949e99 | 2011-10-12 10:44:56 +0300 | [diff] [blame] | 614 | switch (dwc->mode) { |
Felipe Balbi | 0949e99 | 2011-10-12 10:44:56 +0300 | [diff] [blame] | 615 | case DWC3_MODE_DEVICE: |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 616 | dwc3_gadget_exit(dwc); |
Felipe Balbi | 0949e99 | 2011-10-12 10:44:56 +0300 | [diff] [blame] | 617 | break; |
Felipe Balbi | d07e881 | 2011-10-12 14:08:26 +0300 | [diff] [blame] | 618 | case DWC3_MODE_HOST: |
| 619 | dwc3_host_exit(dwc); |
| 620 | break; |
| 621 | case DWC3_MODE_DRD: |
| 622 | dwc3_host_exit(dwc); |
| 623 | dwc3_gadget_exit(dwc); |
| 624 | break; |
Felipe Balbi | 0949e99 | 2011-10-12 10:44:56 +0300 | [diff] [blame] | 625 | default: |
| 626 | /* do nothing */ |
| 627 | break; |
| 628 | } |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 629 | |
Felipe Balbi | f122d33 | 2013-02-08 15:15:11 +0200 | [diff] [blame] | 630 | dwc3_event_buffers_cleanup(dwc); |
Felipe Balbi | d9b4330 | 2013-02-08 15:14:16 +0200 | [diff] [blame] | 631 | dwc3_free_event_buffers(dwc); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 632 | dwc3_core_exit(dwc); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 633 | |
| 634 | return 0; |
| 635 | } |
| 636 | |
Felipe Balbi | 7415f17 | 2012-04-30 14:56:33 +0300 | [diff] [blame] | 637 | #ifdef CONFIG_PM |
| 638 | static int dwc3_prepare(struct device *dev) |
| 639 | { |
| 640 | struct dwc3 *dwc = dev_get_drvdata(dev); |
| 641 | unsigned long flags; |
| 642 | |
| 643 | spin_lock_irqsave(&dwc->lock, flags); |
| 644 | |
| 645 | switch (dwc->mode) { |
| 646 | case DWC3_MODE_DEVICE: |
| 647 | case DWC3_MODE_DRD: |
| 648 | dwc3_gadget_prepare(dwc); |
| 649 | /* FALLTHROUGH */ |
| 650 | case DWC3_MODE_HOST: |
| 651 | default: |
| 652 | dwc3_event_buffers_cleanup(dwc); |
| 653 | break; |
| 654 | } |
| 655 | |
| 656 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 657 | |
| 658 | return 0; |
| 659 | } |
| 660 | |
| 661 | static void dwc3_complete(struct device *dev) |
| 662 | { |
| 663 | struct dwc3 *dwc = dev_get_drvdata(dev); |
| 664 | unsigned long flags; |
| 665 | |
| 666 | spin_lock_irqsave(&dwc->lock, flags); |
| 667 | |
| 668 | switch (dwc->mode) { |
| 669 | case DWC3_MODE_DEVICE: |
| 670 | case DWC3_MODE_DRD: |
| 671 | dwc3_gadget_complete(dwc); |
| 672 | /* FALLTHROUGH */ |
| 673 | case DWC3_MODE_HOST: |
| 674 | default: |
| 675 | dwc3_event_buffers_setup(dwc); |
| 676 | break; |
| 677 | } |
| 678 | |
| 679 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 680 | } |
| 681 | |
| 682 | static int dwc3_suspend(struct device *dev) |
| 683 | { |
| 684 | struct dwc3 *dwc = dev_get_drvdata(dev); |
| 685 | unsigned long flags; |
| 686 | |
| 687 | spin_lock_irqsave(&dwc->lock, flags); |
| 688 | |
| 689 | switch (dwc->mode) { |
| 690 | case DWC3_MODE_DEVICE: |
| 691 | case DWC3_MODE_DRD: |
| 692 | dwc3_gadget_suspend(dwc); |
| 693 | /* FALLTHROUGH */ |
| 694 | case DWC3_MODE_HOST: |
| 695 | default: |
| 696 | /* do nothing */ |
| 697 | break; |
| 698 | } |
| 699 | |
| 700 | dwc->gctl = dwc3_readl(dwc->regs, DWC3_GCTL); |
| 701 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 702 | |
| 703 | usb_phy_shutdown(dwc->usb3_phy); |
| 704 | usb_phy_shutdown(dwc->usb2_phy); |
| 705 | |
| 706 | return 0; |
| 707 | } |
| 708 | |
| 709 | static int dwc3_resume(struct device *dev) |
| 710 | { |
| 711 | struct dwc3 *dwc = dev_get_drvdata(dev); |
| 712 | unsigned long flags; |
| 713 | |
| 714 | usb_phy_init(dwc->usb3_phy); |
| 715 | usb_phy_init(dwc->usb2_phy); |
| 716 | msleep(100); |
| 717 | |
| 718 | spin_lock_irqsave(&dwc->lock, flags); |
| 719 | |
| 720 | dwc3_writel(dwc->regs, DWC3_GCTL, dwc->gctl); |
| 721 | |
| 722 | switch (dwc->mode) { |
| 723 | case DWC3_MODE_DEVICE: |
| 724 | case DWC3_MODE_DRD: |
| 725 | dwc3_gadget_resume(dwc); |
| 726 | /* FALLTHROUGH */ |
| 727 | case DWC3_MODE_HOST: |
| 728 | default: |
| 729 | /* do nothing */ |
| 730 | break; |
| 731 | } |
| 732 | |
| 733 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 734 | |
| 735 | pm_runtime_disable(dev); |
| 736 | pm_runtime_set_active(dev); |
| 737 | pm_runtime_enable(dev); |
| 738 | |
| 739 | return 0; |
| 740 | } |
| 741 | |
| 742 | static const struct dev_pm_ops dwc3_dev_pm_ops = { |
| 743 | .prepare = dwc3_prepare, |
| 744 | .complete = dwc3_complete, |
| 745 | |
| 746 | SET_SYSTEM_SLEEP_PM_OPS(dwc3_suspend, dwc3_resume) |
| 747 | }; |
| 748 | |
| 749 | #define DWC3_PM_OPS &(dwc3_dev_pm_ops) |
| 750 | #else |
| 751 | #define DWC3_PM_OPS NULL |
| 752 | #endif |
| 753 | |
Kishon Vijay Abraham I | 5088b6f | 2013-01-25 16:36:53 +0530 | [diff] [blame] | 754 | #ifdef CONFIG_OF |
| 755 | static const struct of_device_id of_dwc3_match[] = { |
| 756 | { |
| 757 | .compatible = "synopsys,dwc3" |
| 758 | }, |
| 759 | { }, |
| 760 | }; |
| 761 | MODULE_DEVICE_TABLE(of, of_dwc3_match); |
| 762 | #endif |
| 763 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 764 | static struct platform_driver dwc3_driver = { |
| 765 | .probe = dwc3_probe, |
Bill Pemberton | 7690417 | 2012-11-19 13:21:08 -0500 | [diff] [blame] | 766 | .remove = dwc3_remove, |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 767 | .driver = { |
| 768 | .name = "dwc3", |
Kishon Vijay Abraham I | 5088b6f | 2013-01-25 16:36:53 +0530 | [diff] [blame] | 769 | .of_match_table = of_match_ptr(of_dwc3_match), |
Felipe Balbi | 7415f17 | 2012-04-30 14:56:33 +0300 | [diff] [blame] | 770 | .pm = DWC3_PM_OPS, |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 771 | }, |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 772 | }; |
| 773 | |
Tobias Klauser | b1116dc | 2012-02-28 12:57:20 +0100 | [diff] [blame] | 774 | module_platform_driver(dwc3_driver); |
| 775 | |
Sebastian Andrzej Siewior | 7ae4fc4 | 2011-10-19 19:39:50 +0200 | [diff] [blame] | 776 | MODULE_ALIAS("platform:dwc3"); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 777 | MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); |
| 778 | MODULE_LICENSE("Dual BSD/GPL"); |
| 779 | MODULE_DESCRIPTION("DesignWare USB3 DRD Controller Driver"); |