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 | * |
Felipe Balbi | 5945f78 | 2013-06-30 14:15:11 +0300 | [diff] [blame] | 9 | * This program is free software: you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 of |
| 11 | * the License as published by the Free Software Foundation. |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 12 | * |
Felipe Balbi | 5945f78 | 2013-06-30 14:15:11 +0300 | [diff] [blame] | 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 17 | * |
Felipe Balbi | 5945f78 | 2013-06-30 14:15:11 +0300 | [diff] [blame] | 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 20 | */ |
| 21 | |
Felipe Balbi | a72e658 | 2011-09-05 13:37:28 +0300 | [diff] [blame] | 22 | #include <linux/module.h> |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 23 | #include <linux/kernel.h> |
| 24 | #include <linux/slab.h> |
| 25 | #include <linux/spinlock.h> |
| 26 | #include <linux/platform_device.h> |
| 27 | #include <linux/pm_runtime.h> |
| 28 | #include <linux/interrupt.h> |
| 29 | #include <linux/ioport.h> |
| 30 | #include <linux/io.h> |
| 31 | #include <linux/list.h> |
| 32 | #include <linux/delay.h> |
| 33 | #include <linux/dma-mapping.h> |
Felipe Balbi | 457e84b | 2012-01-18 18:04:09 +0200 | [diff] [blame] | 34 | #include <linux/of.h> |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 35 | |
Felipe Balbi | 51e1e7b | 2012-07-19 14:09:48 +0300 | [diff] [blame] | 36 | #include <linux/usb/otg.h> |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 37 | #include <linux/usb/ch9.h> |
| 38 | #include <linux/usb/gadget.h> |
Felipe Balbi | f7e846f | 2013-06-30 14:29:51 +0300 | [diff] [blame] | 39 | #include <linux/usb/of.h> |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 40 | #include <linux/usb/otg.h> |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 41 | |
Felipe Balbi | 6462cbd | 2013-06-30 14:19:33 +0300 | [diff] [blame] | 42 | #include "platform_data.h" |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 43 | #include "core.h" |
| 44 | #include "gadget.h" |
| 45 | #include "io.h" |
| 46 | |
| 47 | #include "debug.h" |
| 48 | |
Felipe Balbi | 8300dd2 | 2011-10-18 13:54:01 +0300 | [diff] [blame] | 49 | /* -------------------------------------------------------------------------- */ |
| 50 | |
Sebastian Andrzej Siewior | 3140e8c | 2011-10-31 22:25:40 +0100 | [diff] [blame] | 51 | void dwc3_set_mode(struct dwc3 *dwc, u32 mode) |
| 52 | { |
| 53 | u32 reg; |
| 54 | |
| 55 | reg = dwc3_readl(dwc->regs, DWC3_GCTL); |
| 56 | reg &= ~(DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_OTG)); |
| 57 | reg |= DWC3_GCTL_PRTCAPDIR(mode); |
| 58 | dwc3_writel(dwc->regs, DWC3_GCTL, reg); |
| 59 | } |
Felipe Balbi | 8300dd2 | 2011-10-18 13:54:01 +0300 | [diff] [blame] | 60 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 61 | /** |
| 62 | * dwc3_core_soft_reset - Issues core soft reset and PHY reset |
| 63 | * @dwc: pointer to our context structure |
| 64 | */ |
| 65 | static void dwc3_core_soft_reset(struct dwc3 *dwc) |
| 66 | { |
| 67 | u32 reg; |
| 68 | |
| 69 | /* Before Resetting PHY, put Core in Reset */ |
| 70 | reg = dwc3_readl(dwc->regs, DWC3_GCTL); |
| 71 | reg |= DWC3_GCTL_CORESOFTRESET; |
| 72 | dwc3_writel(dwc->regs, DWC3_GCTL, reg); |
| 73 | |
| 74 | /* Assert USB3 PHY reset */ |
| 75 | reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); |
| 76 | reg |= DWC3_GUSB3PIPECTL_PHYSOFTRST; |
| 77 | dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); |
| 78 | |
| 79 | /* Assert USB2 PHY reset */ |
| 80 | reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); |
| 81 | reg |= DWC3_GUSB2PHYCFG_PHYSOFTRST; |
| 82 | dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); |
| 83 | |
Felipe Balbi | 51e1e7b | 2012-07-19 14:09:48 +0300 | [diff] [blame] | 84 | usb_phy_init(dwc->usb2_phy); |
| 85 | usb_phy_init(dwc->usb3_phy); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 86 | mdelay(100); |
| 87 | |
| 88 | /* Clear USB3 PHY reset */ |
| 89 | reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); |
| 90 | reg &= ~DWC3_GUSB3PIPECTL_PHYSOFTRST; |
| 91 | dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); |
| 92 | |
| 93 | /* Clear USB2 PHY reset */ |
| 94 | reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); |
| 95 | reg &= ~DWC3_GUSB2PHYCFG_PHYSOFTRST; |
| 96 | dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); |
| 97 | |
Pratyush Anand | 45627ac | 2012-06-21 17:44:28 +0530 | [diff] [blame] | 98 | mdelay(100); |
| 99 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 100 | /* After PHYs are stable we can take Core out of reset state */ |
| 101 | reg = dwc3_readl(dwc->regs, DWC3_GCTL); |
| 102 | reg &= ~DWC3_GCTL_CORESOFTRESET; |
| 103 | dwc3_writel(dwc->regs, DWC3_GCTL, reg); |
| 104 | } |
| 105 | |
| 106 | /** |
| 107 | * dwc3_free_one_event_buffer - Frees one event buffer |
| 108 | * @dwc: Pointer to our controller context structure |
| 109 | * @evt: Pointer to event buffer to be freed |
| 110 | */ |
| 111 | static void dwc3_free_one_event_buffer(struct dwc3 *dwc, |
| 112 | struct dwc3_event_buffer *evt) |
| 113 | { |
| 114 | dma_free_coherent(dwc->dev, evt->length, evt->buf, evt->dma); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 115 | } |
| 116 | |
| 117 | /** |
Paul Zimmerman | 1d04679 | 2012-02-15 18:56:56 -0800 | [diff] [blame] | 118 | * dwc3_alloc_one_event_buffer - Allocates one event buffer structure |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 119 | * @dwc: Pointer to our controller context structure |
| 120 | * @length: size of the event buffer |
| 121 | * |
Paul Zimmerman | 1d04679 | 2012-02-15 18:56:56 -0800 | [diff] [blame] | 122 | * Returns a pointer to the allocated event buffer structure on success |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 123 | * otherwise ERR_PTR(errno). |
| 124 | */ |
Felipe Balbi | 67d0b50 | 2013-02-22 16:31:07 +0200 | [diff] [blame] | 125 | static struct dwc3_event_buffer *dwc3_alloc_one_event_buffer(struct dwc3 *dwc, |
| 126 | unsigned length) |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 127 | { |
| 128 | struct dwc3_event_buffer *evt; |
| 129 | |
Felipe Balbi | 380f0d2 | 2012-10-11 13:48:36 +0300 | [diff] [blame] | 130 | evt = devm_kzalloc(dwc->dev, sizeof(*evt), GFP_KERNEL); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 131 | if (!evt) |
| 132 | return ERR_PTR(-ENOMEM); |
| 133 | |
| 134 | evt->dwc = dwc; |
| 135 | evt->length = length; |
| 136 | evt->buf = dma_alloc_coherent(dwc->dev, length, |
| 137 | &evt->dma, GFP_KERNEL); |
Felipe Balbi | e32672f | 2012-11-08 15:26:41 +0200 | [diff] [blame] | 138 | if (!evt->buf) |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 139 | return ERR_PTR(-ENOMEM); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 140 | |
| 141 | return evt; |
| 142 | } |
| 143 | |
| 144 | /** |
| 145 | * dwc3_free_event_buffers - frees all allocated event buffers |
| 146 | * @dwc: Pointer to our controller context structure |
| 147 | */ |
| 148 | static void dwc3_free_event_buffers(struct dwc3 *dwc) |
| 149 | { |
| 150 | struct dwc3_event_buffer *evt; |
| 151 | int i; |
| 152 | |
Felipe Balbi | 9f622b2 | 2011-10-12 10:31:04 +0300 | [diff] [blame] | 153 | for (i = 0; i < dwc->num_event_buffers; i++) { |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 154 | evt = dwc->ev_buffs[i]; |
Anton Tikhomirov | 64b6c8a | 2012-03-06 17:05:15 +0900 | [diff] [blame] | 155 | if (evt) |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 156 | dwc3_free_one_event_buffer(dwc, evt); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 157 | } |
| 158 | } |
| 159 | |
| 160 | /** |
| 161 | * dwc3_alloc_event_buffers - Allocates @num event buffers of size @length |
Paul Zimmerman | 1d04679 | 2012-02-15 18:56:56 -0800 | [diff] [blame] | 162 | * @dwc: pointer to our controller context structure |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 163 | * @length: size of event buffer |
| 164 | * |
Paul Zimmerman | 1d04679 | 2012-02-15 18:56:56 -0800 | [diff] [blame] | 165 | * Returns 0 on success otherwise negative errno. In the error case, dwc |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 166 | * may contain some buffers allocated but not all which were requested. |
| 167 | */ |
Bill Pemberton | 41ac7b3 | 2012-11-19 13:21:48 -0500 | [diff] [blame] | 168 | static int dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned length) |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 169 | { |
Felipe Balbi | 9f622b2 | 2011-10-12 10:31:04 +0300 | [diff] [blame] | 170 | int num; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 171 | int i; |
| 172 | |
Felipe Balbi | 9f622b2 | 2011-10-12 10:31:04 +0300 | [diff] [blame] | 173 | num = DWC3_NUM_INT(dwc->hwparams.hwparams1); |
| 174 | dwc->num_event_buffers = num; |
| 175 | |
Felipe Balbi | 380f0d2 | 2012-10-11 13:48:36 +0300 | [diff] [blame] | 176 | dwc->ev_buffs = devm_kzalloc(dwc->dev, sizeof(*dwc->ev_buffs) * num, |
| 177 | GFP_KERNEL); |
Felipe Balbi | 457d3f2 | 2011-10-24 12:03:13 +0300 | [diff] [blame] | 178 | if (!dwc->ev_buffs) { |
| 179 | dev_err(dwc->dev, "can't allocate event buffers array\n"); |
| 180 | return -ENOMEM; |
| 181 | } |
| 182 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 183 | for (i = 0; i < num; i++) { |
| 184 | struct dwc3_event_buffer *evt; |
| 185 | |
| 186 | evt = dwc3_alloc_one_event_buffer(dwc, length); |
| 187 | if (IS_ERR(evt)) { |
| 188 | dev_err(dwc->dev, "can't allocate event buffer\n"); |
| 189 | return PTR_ERR(evt); |
| 190 | } |
| 191 | dwc->ev_buffs[i] = evt; |
| 192 | } |
| 193 | |
| 194 | return 0; |
| 195 | } |
| 196 | |
| 197 | /** |
| 198 | * dwc3_event_buffers_setup - setup our allocated event buffers |
Paul Zimmerman | 1d04679 | 2012-02-15 18:56:56 -0800 | [diff] [blame] | 199 | * @dwc: pointer to our controller context structure |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 200 | * |
| 201 | * Returns 0 on success otherwise negative errno. |
| 202 | */ |
Paul Zimmerman | 7acd85e | 2012-04-27 14:28:02 +0300 | [diff] [blame] | 203 | static int dwc3_event_buffers_setup(struct dwc3 *dwc) |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 204 | { |
| 205 | struct dwc3_event_buffer *evt; |
| 206 | int n; |
| 207 | |
Felipe Balbi | 9f622b2 | 2011-10-12 10:31:04 +0300 | [diff] [blame] | 208 | for (n = 0; n < dwc->num_event_buffers; n++) { |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 209 | evt = dwc->ev_buffs[n]; |
| 210 | dev_dbg(dwc->dev, "Event buf %p dma %08llx length %d\n", |
| 211 | evt->buf, (unsigned long long) evt->dma, |
| 212 | evt->length); |
| 213 | |
Paul Zimmerman | 7acd85e | 2012-04-27 14:28:02 +0300 | [diff] [blame] | 214 | evt->lpos = 0; |
| 215 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 216 | dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(n), |
| 217 | lower_32_bits(evt->dma)); |
| 218 | dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(n), |
| 219 | upper_32_bits(evt->dma)); |
| 220 | dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(n), |
Felipe Balbi | 68d6a01 | 2013-06-12 21:09:26 +0300 | [diff] [blame] | 221 | DWC3_GEVNTSIZ_SIZE(evt->length)); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 222 | dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(n), 0); |
| 223 | } |
| 224 | |
| 225 | return 0; |
| 226 | } |
| 227 | |
| 228 | static void dwc3_event_buffers_cleanup(struct dwc3 *dwc) |
| 229 | { |
| 230 | struct dwc3_event_buffer *evt; |
| 231 | int n; |
| 232 | |
Felipe Balbi | 9f622b2 | 2011-10-12 10:31:04 +0300 | [diff] [blame] | 233 | for (n = 0; n < dwc->num_event_buffers; n++) { |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 234 | evt = dwc->ev_buffs[n]; |
Paul Zimmerman | 7acd85e | 2012-04-27 14:28:02 +0300 | [diff] [blame] | 235 | |
| 236 | evt->lpos = 0; |
| 237 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 238 | dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(n), 0); |
| 239 | dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(n), 0); |
Felipe Balbi | 68d6a01 | 2013-06-12 21:09:26 +0300 | [diff] [blame] | 240 | dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(n), DWC3_GEVNTSIZ_INTMASK |
| 241 | | DWC3_GEVNTSIZ_SIZE(0)); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 242 | dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(n), 0); |
| 243 | } |
| 244 | } |
| 245 | |
Felipe Balbi | 789451f6 | 2011-05-05 15:53:10 +0300 | [diff] [blame] | 246 | static void dwc3_core_num_eps(struct dwc3 *dwc) |
| 247 | { |
| 248 | struct dwc3_hwparams *parms = &dwc->hwparams; |
| 249 | |
| 250 | dwc->num_in_eps = DWC3_NUM_IN_EPS(parms); |
| 251 | dwc->num_out_eps = DWC3_NUM_EPS(parms) - dwc->num_in_eps; |
| 252 | |
| 253 | dev_vdbg(dwc->dev, "found %d IN and %d OUT endpoints\n", |
| 254 | dwc->num_in_eps, dwc->num_out_eps); |
| 255 | } |
| 256 | |
Bill Pemberton | 41ac7b3 | 2012-11-19 13:21:48 -0500 | [diff] [blame] | 257 | static void dwc3_cache_hwparams(struct dwc3 *dwc) |
Felipe Balbi | 26ceca9 | 2011-09-30 10:58:49 +0300 | [diff] [blame] | 258 | { |
| 259 | struct dwc3_hwparams *parms = &dwc->hwparams; |
| 260 | |
| 261 | parms->hwparams0 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS0); |
| 262 | parms->hwparams1 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS1); |
| 263 | parms->hwparams2 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS2); |
| 264 | parms->hwparams3 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS3); |
| 265 | parms->hwparams4 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS4); |
| 266 | parms->hwparams5 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS5); |
| 267 | parms->hwparams6 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS6); |
| 268 | parms->hwparams7 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS7); |
| 269 | parms->hwparams8 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS8); |
| 270 | } |
| 271 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 272 | /** |
| 273 | * dwc3_core_init - Low-level initialization of DWC3 Core |
| 274 | * @dwc: Pointer to our controller context structure |
| 275 | * |
| 276 | * Returns 0 on success otherwise negative errno. |
| 277 | */ |
Bill Pemberton | 41ac7b3 | 2012-11-19 13:21:48 -0500 | [diff] [blame] | 278 | static int dwc3_core_init(struct dwc3 *dwc) |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 279 | { |
| 280 | unsigned long timeout; |
| 281 | u32 reg; |
| 282 | int ret; |
| 283 | |
Sebastian Andrzej Siewior | 7650bd7 | 2011-08-29 13:56:36 +0200 | [diff] [blame] | 284 | reg = dwc3_readl(dwc->regs, DWC3_GSNPSID); |
| 285 | /* This should read as U3 followed by revision number */ |
| 286 | if ((reg & DWC3_GSNPSID_MASK) != 0x55330000) { |
| 287 | dev_err(dwc->dev, "this is not a DesignWare USB3 DRD Core\n"); |
| 288 | ret = -ENODEV; |
| 289 | goto err0; |
| 290 | } |
Felipe Balbi | 248b122 | 2011-12-14 21:59:30 +0200 | [diff] [blame] | 291 | dwc->revision = reg; |
Sebastian Andrzej Siewior | 7650bd7 | 2011-08-29 13:56:36 +0200 | [diff] [blame] | 292 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 293 | /* issue device SoftReset too */ |
| 294 | timeout = jiffies + msecs_to_jiffies(500); |
| 295 | dwc3_writel(dwc->regs, DWC3_DCTL, DWC3_DCTL_CSFTRST); |
| 296 | do { |
| 297 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); |
| 298 | if (!(reg & DWC3_DCTL_CSFTRST)) |
| 299 | break; |
| 300 | |
| 301 | if (time_after(jiffies, timeout)) { |
| 302 | dev_err(dwc->dev, "Reset Timed Out\n"); |
| 303 | ret = -ETIMEDOUT; |
| 304 | goto err0; |
| 305 | } |
| 306 | |
| 307 | cpu_relax(); |
| 308 | } while (true); |
| 309 | |
Pratyush Anand | 58a0f23 | 2012-06-21 17:44:29 +0530 | [diff] [blame] | 310 | dwc3_core_soft_reset(dwc); |
| 311 | |
Sebastian Andrzej Siewior | 4878a02 | 2011-10-31 22:25:41 +0100 | [diff] [blame] | 312 | reg = dwc3_readl(dwc->regs, DWC3_GCTL); |
Paul Zimmerman | 3e87c42 | 2012-02-24 17:32:13 -0800 | [diff] [blame] | 313 | reg &= ~DWC3_GCTL_SCALEDOWN_MASK; |
Sebastian Andrzej Siewior | 4878a02 | 2011-10-31 22:25:41 +0100 | [diff] [blame] | 314 | reg &= ~DWC3_GCTL_DISSCRAMBLE; |
| 315 | |
Sebastian Andrzej Siewior | 164d773 | 2011-11-24 11:22:05 +0100 | [diff] [blame] | 316 | switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams1)) { |
Sebastian Andrzej Siewior | 4878a02 | 2011-10-31 22:25:41 +0100 | [diff] [blame] | 317 | case DWC3_GHWPARAMS1_EN_PWROPT_CLK: |
| 318 | reg &= ~DWC3_GCTL_DSBLCLKGTNG; |
| 319 | break; |
| 320 | default: |
| 321 | dev_dbg(dwc->dev, "No power optimization available\n"); |
| 322 | } |
| 323 | |
| 324 | /* |
| 325 | * WORKAROUND: DWC3 revisions <1.90a have a bug |
Paul Zimmerman | 1d04679 | 2012-02-15 18:56:56 -0800 | [diff] [blame] | 326 | * where the device can fail to connect at SuperSpeed |
Sebastian Andrzej Siewior | 4878a02 | 2011-10-31 22:25:41 +0100 | [diff] [blame] | 327 | * and falls back to high-speed mode which causes |
Paul Zimmerman | 1d04679 | 2012-02-15 18:56:56 -0800 | [diff] [blame] | 328 | * the device to enter a Connect/Disconnect loop |
Sebastian Andrzej Siewior | 4878a02 | 2011-10-31 22:25:41 +0100 | [diff] [blame] | 329 | */ |
| 330 | if (dwc->revision < DWC3_REVISION_190A) |
| 331 | reg |= DWC3_GCTL_U2RSTECN; |
| 332 | |
Felipe Balbi | 789451f6 | 2011-05-05 15:53:10 +0300 | [diff] [blame] | 333 | dwc3_core_num_eps(dwc); |
| 334 | |
Sebastian Andrzej Siewior | 4878a02 | 2011-10-31 22:25:41 +0100 | [diff] [blame] | 335 | dwc3_writel(dwc->regs, DWC3_GCTL, reg); |
| 336 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 337 | return 0; |
| 338 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 339 | err0: |
| 340 | return ret; |
| 341 | } |
| 342 | |
| 343 | static void dwc3_core_exit(struct dwc3 *dwc) |
| 344 | { |
Vivek Gautam | 01b8daf | 2012-10-13 19:20:18 +0530 | [diff] [blame] | 345 | usb_phy_shutdown(dwc->usb2_phy); |
| 346 | usb_phy_shutdown(dwc->usb3_phy); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 347 | } |
| 348 | |
| 349 | #define DWC3_ALIGN_MASK (16 - 1) |
| 350 | |
Bill Pemberton | 41ac7b3 | 2012-11-19 13:21:48 -0500 | [diff] [blame] | 351 | static int dwc3_probe(struct platform_device *pdev) |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 352 | { |
Felipe Balbi | 941ea36 | 2013-07-31 09:21:25 +0300 | [diff] [blame] | 353 | struct device *dev = &pdev->dev; |
| 354 | struct dwc3_platform_data *pdata = dev_get_platdata(dev); |
| 355 | struct device_node *node = dev->of_node; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 356 | struct resource *res; |
| 357 | struct dwc3 *dwc; |
Felipe Balbi | 0949e99 | 2011-10-12 10:44:56 +0300 | [diff] [blame] | 358 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 359 | int ret = -ENOMEM; |
Felipe Balbi | 0949e99 | 2011-10-12 10:44:56 +0300 | [diff] [blame] | 360 | |
| 361 | void __iomem *regs; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 362 | void *mem; |
| 363 | |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 364 | mem = devm_kzalloc(dev, sizeof(*dwc) + DWC3_ALIGN_MASK, GFP_KERNEL); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 365 | if (!mem) { |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 366 | dev_err(dev, "not enough memory\n"); |
| 367 | return -ENOMEM; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 368 | } |
| 369 | dwc = PTR_ALIGN(mem, DWC3_ALIGN_MASK + 1); |
| 370 | dwc->mem = mem; |
| 371 | |
Ido Shayevitz | 51249dc | 2012-04-24 14:18:39 +0300 | [diff] [blame] | 372 | res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 373 | if (!res) { |
Ido Shayevitz | 51249dc | 2012-04-24 14:18:39 +0300 | [diff] [blame] | 374 | dev_err(dev, "missing IRQ\n"); |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 375 | return -ENODEV; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 376 | } |
Kishon Vijay Abraham I | 066618b | 2012-08-21 14:56:16 +0530 | [diff] [blame] | 377 | dwc->xhci_resources[1].start = res->start; |
| 378 | dwc->xhci_resources[1].end = res->end; |
| 379 | dwc->xhci_resources[1].flags = res->flags; |
| 380 | dwc->xhci_resources[1].name = res->name; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 381 | |
Ido Shayevitz | 51249dc | 2012-04-24 14:18:39 +0300 | [diff] [blame] | 382 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 383 | if (!res) { |
| 384 | dev_err(dev, "missing memory resource\n"); |
| 385 | return -ENODEV; |
| 386 | } |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 387 | |
Kishon Vijay Abraham I | 5088b6f | 2013-01-25 16:36:53 +0530 | [diff] [blame] | 388 | if (node) { |
Felipe Balbi | f7e846f | 2013-06-30 14:29:51 +0300 | [diff] [blame] | 389 | dwc->maximum_speed = of_usb_get_maximum_speed(node); |
| 390 | |
Kishon Vijay Abraham I | 5088b6f | 2013-01-25 16:36:53 +0530 | [diff] [blame] | 391 | dwc->usb2_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 0); |
| 392 | dwc->usb3_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 1); |
Felipe Balbi | 6462cbd | 2013-06-30 14:19:33 +0300 | [diff] [blame] | 393 | |
| 394 | dwc->needs_fifo_resize = of_property_read_bool(node, "tx-fifo-resize"); |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 395 | dwc->dr_mode = of_usb_get_dr_mode(node); |
Felipe Balbi | bb67490 | 2013-08-14 13:21:23 -0500 | [diff] [blame^] | 396 | } else if (pdata) { |
Felipe Balbi | f7e846f | 2013-06-30 14:29:51 +0300 | [diff] [blame] | 397 | dwc->maximum_speed = pdata->maximum_speed; |
| 398 | |
Kishon Vijay Abraham I | 5088b6f | 2013-01-25 16:36:53 +0530 | [diff] [blame] | 399 | dwc->usb2_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2); |
| 400 | dwc->usb3_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB3); |
Felipe Balbi | 6462cbd | 2013-06-30 14:19:33 +0300 | [diff] [blame] | 401 | |
| 402 | dwc->needs_fifo_resize = pdata->tx_fifo_resize; |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 403 | dwc->dr_mode = pdata->dr_mode; |
Felipe Balbi | bb67490 | 2013-08-14 13:21:23 -0500 | [diff] [blame^] | 404 | } else { |
| 405 | dwc->usb2_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2); |
| 406 | dwc->usb3_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB3); |
Kishon Vijay Abraham I | 5088b6f | 2013-01-25 16:36:53 +0530 | [diff] [blame] | 407 | } |
| 408 | |
Felipe Balbi | f7e846f | 2013-06-30 14:29:51 +0300 | [diff] [blame] | 409 | /* default to superspeed if no maximum_speed passed */ |
| 410 | if (dwc->maximum_speed == USB_SPEED_UNKNOWN) |
| 411 | dwc->maximum_speed = USB_SPEED_SUPER; |
| 412 | |
Felipe Balbi | d105e7f | 2013-03-15 10:52:08 +0200 | [diff] [blame] | 413 | if (IS_ERR(dwc->usb2_phy)) { |
| 414 | ret = PTR_ERR(dwc->usb2_phy); |
| 415 | |
| 416 | /* |
| 417 | * if -ENXIO is returned, it means PHY layer wasn't |
| 418 | * enabled, so it makes no sense to return -EPROBE_DEFER |
| 419 | * in that case, since no PHY driver will ever probe. |
| 420 | */ |
| 421 | if (ret == -ENXIO) |
| 422 | return ret; |
| 423 | |
Felipe Balbi | 51e1e7b | 2012-07-19 14:09:48 +0300 | [diff] [blame] | 424 | dev_err(dev, "no usb2 phy configured\n"); |
| 425 | return -EPROBE_DEFER; |
| 426 | } |
| 427 | |
Felipe Balbi | d105e7f | 2013-03-15 10:52:08 +0200 | [diff] [blame] | 428 | if (IS_ERR(dwc->usb3_phy)) { |
Ruchika Kharwar | 315955d7 | 2013-07-04 00:59:34 -0500 | [diff] [blame] | 429 | ret = PTR_ERR(dwc->usb3_phy); |
Felipe Balbi | d105e7f | 2013-03-15 10:52:08 +0200 | [diff] [blame] | 430 | |
| 431 | /* |
| 432 | * if -ENXIO is returned, it means PHY layer wasn't |
| 433 | * enabled, so it makes no sense to return -EPROBE_DEFER |
| 434 | * in that case, since no PHY driver will ever probe. |
| 435 | */ |
| 436 | if (ret == -ENXIO) |
| 437 | return ret; |
| 438 | |
Felipe Balbi | 51e1e7b | 2012-07-19 14:09:48 +0300 | [diff] [blame] | 439 | dev_err(dev, "no usb3 phy configured\n"); |
| 440 | return -EPROBE_DEFER; |
| 441 | } |
| 442 | |
Ivan T. Ivanov | 2e11234 | 2013-07-29 10:27:02 +0300 | [diff] [blame] | 443 | dwc->xhci_resources[0].start = res->start; |
| 444 | dwc->xhci_resources[0].end = dwc->xhci_resources[0].start + |
| 445 | DWC3_XHCI_REGS_END; |
| 446 | dwc->xhci_resources[0].flags = res->flags; |
| 447 | dwc->xhci_resources[0].name = res->name; |
| 448 | |
| 449 | res->start += DWC3_GLOBALS_REGS_START; |
| 450 | |
| 451 | /* |
| 452 | * Request memory region but exclude xHCI regs, |
| 453 | * since it will be requested by the xhci-plat driver. |
| 454 | */ |
| 455 | regs = devm_ioremap_resource(dev, res); |
| 456 | if (IS_ERR(regs)) |
| 457 | return PTR_ERR(regs); |
| 458 | |
Kishon Vijay Abraham I | 8ba007a | 2013-01-25 08:30:54 +0530 | [diff] [blame] | 459 | usb_phy_set_suspend(dwc->usb2_phy, 0); |
| 460 | usb_phy_set_suspend(dwc->usb3_phy, 0); |
| 461 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 462 | spin_lock_init(&dwc->lock); |
| 463 | platform_set_drvdata(pdev, dwc); |
| 464 | |
| 465 | dwc->regs = regs; |
| 466 | dwc->regs_size = resource_size(res); |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 467 | dwc->dev = dev; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 468 | |
Kishon Vijay Abraham I | ddff14f | 2013-03-07 18:51:43 +0530 | [diff] [blame] | 469 | dev->dma_mask = dev->parent->dma_mask; |
| 470 | dev->dma_parms = dev->parent->dma_parms; |
| 471 | dma_set_coherent_mask(dev, dev->parent->coherent_dma_mask); |
| 472 | |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 473 | pm_runtime_enable(dev); |
| 474 | pm_runtime_get_sync(dev); |
| 475 | pm_runtime_forbid(dev); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 476 | |
Kishon Vijay Abraham I | 4fd2448 | 2012-11-16 12:07:54 +0530 | [diff] [blame] | 477 | dwc3_cache_hwparams(dwc); |
| 478 | |
Felipe Balbi | 3921426 | 2012-10-11 13:54:36 +0300 | [diff] [blame] | 479 | ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE); |
| 480 | if (ret) { |
| 481 | dev_err(dwc->dev, "failed to allocate event buffers\n"); |
| 482 | ret = -ENOMEM; |
| 483 | goto err0; |
| 484 | } |
| 485 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 486 | ret = dwc3_core_init(dwc); |
| 487 | if (ret) { |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 488 | dev_err(dev, "failed to initialize core\n"); |
Felipe Balbi | 3921426 | 2012-10-11 13:54:36 +0300 | [diff] [blame] | 489 | goto err0; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 490 | } |
| 491 | |
Felipe Balbi | f122d33 | 2013-02-08 15:15:11 +0200 | [diff] [blame] | 492 | ret = dwc3_event_buffers_setup(dwc); |
| 493 | if (ret) { |
| 494 | dev_err(dwc->dev, "failed to setup event buffers\n"); |
| 495 | goto err1; |
| 496 | } |
| 497 | |
Vivek Gautam | cd051da | 2013-03-02 18:55:24 +0530 | [diff] [blame] | 498 | if (IS_ENABLED(CONFIG_USB_DWC3_HOST)) |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 499 | dwc->dr_mode = USB_DR_MODE_HOST; |
Vivek Gautam | cd051da | 2013-03-02 18:55:24 +0530 | [diff] [blame] | 500 | else if (IS_ENABLED(CONFIG_USB_DWC3_GADGET)) |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 501 | dwc->dr_mode = USB_DR_MODE_PERIPHERAL; |
Felipe Balbi | 0949e99 | 2011-10-12 10:44:56 +0300 | [diff] [blame] | 502 | |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 503 | if (dwc->dr_mode == USB_DR_MODE_UNKNOWN) |
| 504 | dwc->dr_mode = USB_DR_MODE_OTG; |
| 505 | |
| 506 | switch (dwc->dr_mode) { |
| 507 | case USB_DR_MODE_PERIPHERAL: |
Sebastian Andrzej Siewior | 3140e8c | 2011-10-31 22:25:40 +0100 | [diff] [blame] | 508 | dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 509 | ret = dwc3_gadget_init(dwc); |
| 510 | if (ret) { |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 511 | dev_err(dev, "failed to initialize gadget\n"); |
Felipe Balbi | f122d33 | 2013-02-08 15:15:11 +0200 | [diff] [blame] | 512 | goto err2; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 513 | } |
Felipe Balbi | 0949e99 | 2011-10-12 10:44:56 +0300 | [diff] [blame] | 514 | break; |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 515 | case USB_DR_MODE_HOST: |
Sebastian Andrzej Siewior | 3140e8c | 2011-10-31 22:25:40 +0100 | [diff] [blame] | 516 | dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_HOST); |
Felipe Balbi | d07e881 | 2011-10-12 14:08:26 +0300 | [diff] [blame] | 517 | ret = dwc3_host_init(dwc); |
| 518 | if (ret) { |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 519 | dev_err(dev, "failed to initialize host\n"); |
Felipe Balbi | f122d33 | 2013-02-08 15:15:11 +0200 | [diff] [blame] | 520 | goto err2; |
Felipe Balbi | d07e881 | 2011-10-12 14:08:26 +0300 | [diff] [blame] | 521 | } |
| 522 | break; |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 523 | case USB_DR_MODE_OTG: |
Sebastian Andrzej Siewior | 3140e8c | 2011-10-31 22:25:40 +0100 | [diff] [blame] | 524 | dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_OTG); |
Felipe Balbi | d07e881 | 2011-10-12 14:08:26 +0300 | [diff] [blame] | 525 | ret = dwc3_host_init(dwc); |
| 526 | if (ret) { |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 527 | dev_err(dev, "failed to initialize host\n"); |
Felipe Balbi | f122d33 | 2013-02-08 15:15:11 +0200 | [diff] [blame] | 528 | goto err2; |
Felipe Balbi | d07e881 | 2011-10-12 14:08:26 +0300 | [diff] [blame] | 529 | } |
| 530 | |
| 531 | ret = dwc3_gadget_init(dwc); |
| 532 | if (ret) { |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 533 | dev_err(dev, "failed to initialize gadget\n"); |
Felipe Balbi | f122d33 | 2013-02-08 15:15:11 +0200 | [diff] [blame] | 534 | goto err2; |
Felipe Balbi | d07e881 | 2011-10-12 14:08:26 +0300 | [diff] [blame] | 535 | } |
| 536 | break; |
Felipe Balbi | 0949e99 | 2011-10-12 10:44:56 +0300 | [diff] [blame] | 537 | default: |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 538 | dev_err(dev, "Unsupported mode of operation %d\n", dwc->dr_mode); |
Felipe Balbi | f122d33 | 2013-02-08 15:15:11 +0200 | [diff] [blame] | 539 | goto err2; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 540 | } |
| 541 | |
| 542 | ret = dwc3_debugfs_init(dwc); |
| 543 | if (ret) { |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 544 | dev_err(dev, "failed to initialize debugfs\n"); |
Felipe Balbi | f122d33 | 2013-02-08 15:15:11 +0200 | [diff] [blame] | 545 | goto err3; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 546 | } |
| 547 | |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 548 | pm_runtime_allow(dev); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 549 | |
| 550 | return 0; |
| 551 | |
Felipe Balbi | f122d33 | 2013-02-08 15:15:11 +0200 | [diff] [blame] | 552 | err3: |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 553 | switch (dwc->dr_mode) { |
| 554 | case USB_DR_MODE_PERIPHERAL: |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 555 | dwc3_gadget_exit(dwc); |
Felipe Balbi | 0949e99 | 2011-10-12 10:44:56 +0300 | [diff] [blame] | 556 | break; |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 557 | case USB_DR_MODE_HOST: |
Felipe Balbi | d07e881 | 2011-10-12 14:08:26 +0300 | [diff] [blame] | 558 | dwc3_host_exit(dwc); |
| 559 | break; |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 560 | case USB_DR_MODE_OTG: |
Felipe Balbi | d07e881 | 2011-10-12 14:08:26 +0300 | [diff] [blame] | 561 | dwc3_host_exit(dwc); |
| 562 | dwc3_gadget_exit(dwc); |
| 563 | break; |
Felipe Balbi | 0949e99 | 2011-10-12 10:44:56 +0300 | [diff] [blame] | 564 | default: |
| 565 | /* do nothing */ |
| 566 | break; |
| 567 | } |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 568 | |
Felipe Balbi | f122d33 | 2013-02-08 15:15:11 +0200 | [diff] [blame] | 569 | err2: |
| 570 | dwc3_event_buffers_cleanup(dwc); |
| 571 | |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 572 | err1: |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 573 | dwc3_core_exit(dwc); |
| 574 | |
Felipe Balbi | 3921426 | 2012-10-11 13:54:36 +0300 | [diff] [blame] | 575 | err0: |
| 576 | dwc3_free_event_buffers(dwc); |
| 577 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 578 | return ret; |
| 579 | } |
| 580 | |
Bill Pemberton | fb4e98a | 2012-11-19 13:26:20 -0500 | [diff] [blame] | 581 | static int dwc3_remove(struct platform_device *pdev) |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 582 | { |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 583 | struct dwc3 *dwc = platform_get_drvdata(pdev); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 584 | |
Kishon Vijay Abraham I | 8ba007a | 2013-01-25 08:30:54 +0530 | [diff] [blame] | 585 | usb_phy_set_suspend(dwc->usb2_phy, 1); |
| 586 | usb_phy_set_suspend(dwc->usb3_phy, 1); |
| 587 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 588 | pm_runtime_put(&pdev->dev); |
| 589 | pm_runtime_disable(&pdev->dev); |
| 590 | |
| 591 | dwc3_debugfs_exit(dwc); |
| 592 | |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 593 | switch (dwc->dr_mode) { |
| 594 | case USB_DR_MODE_PERIPHERAL: |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 595 | dwc3_gadget_exit(dwc); |
Felipe Balbi | 0949e99 | 2011-10-12 10:44:56 +0300 | [diff] [blame] | 596 | break; |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 597 | case USB_DR_MODE_HOST: |
Felipe Balbi | d07e881 | 2011-10-12 14:08:26 +0300 | [diff] [blame] | 598 | dwc3_host_exit(dwc); |
| 599 | break; |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 600 | case USB_DR_MODE_OTG: |
Felipe Balbi | d07e881 | 2011-10-12 14:08:26 +0300 | [diff] [blame] | 601 | dwc3_host_exit(dwc); |
| 602 | dwc3_gadget_exit(dwc); |
| 603 | break; |
Felipe Balbi | 0949e99 | 2011-10-12 10:44:56 +0300 | [diff] [blame] | 604 | default: |
| 605 | /* do nothing */ |
| 606 | break; |
| 607 | } |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 608 | |
Felipe Balbi | f122d33 | 2013-02-08 15:15:11 +0200 | [diff] [blame] | 609 | dwc3_event_buffers_cleanup(dwc); |
Felipe Balbi | d9b4330 | 2013-02-08 15:14:16 +0200 | [diff] [blame] | 610 | dwc3_free_event_buffers(dwc); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 611 | dwc3_core_exit(dwc); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 612 | |
| 613 | return 0; |
| 614 | } |
| 615 | |
Jingoo Han | 19fda7c | 2013-03-26 01:52:48 +0000 | [diff] [blame] | 616 | #ifdef CONFIG_PM_SLEEP |
Felipe Balbi | 7415f17 | 2012-04-30 14:56:33 +0300 | [diff] [blame] | 617 | static int dwc3_prepare(struct device *dev) |
| 618 | { |
| 619 | struct dwc3 *dwc = dev_get_drvdata(dev); |
| 620 | unsigned long flags; |
| 621 | |
| 622 | spin_lock_irqsave(&dwc->lock, flags); |
| 623 | |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 624 | switch (dwc->dr_mode) { |
| 625 | case USB_DR_MODE_PERIPHERAL: |
| 626 | case USB_DR_MODE_OTG: |
Felipe Balbi | 7415f17 | 2012-04-30 14:56:33 +0300 | [diff] [blame] | 627 | dwc3_gadget_prepare(dwc); |
| 628 | /* FALLTHROUGH */ |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 629 | case USB_DR_MODE_HOST: |
Felipe Balbi | 7415f17 | 2012-04-30 14:56:33 +0300 | [diff] [blame] | 630 | default: |
| 631 | dwc3_event_buffers_cleanup(dwc); |
| 632 | break; |
| 633 | } |
| 634 | |
| 635 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 636 | |
| 637 | return 0; |
| 638 | } |
| 639 | |
| 640 | static void dwc3_complete(struct device *dev) |
| 641 | { |
| 642 | struct dwc3 *dwc = dev_get_drvdata(dev); |
| 643 | unsigned long flags; |
| 644 | |
| 645 | spin_lock_irqsave(&dwc->lock, flags); |
| 646 | |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 647 | switch (dwc->dr_mode) { |
| 648 | case USB_DR_MODE_PERIPHERAL: |
| 649 | case USB_DR_MODE_OTG: |
Felipe Balbi | 7415f17 | 2012-04-30 14:56:33 +0300 | [diff] [blame] | 650 | dwc3_gadget_complete(dwc); |
| 651 | /* FALLTHROUGH */ |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 652 | case USB_DR_MODE_HOST: |
Felipe Balbi | 7415f17 | 2012-04-30 14:56:33 +0300 | [diff] [blame] | 653 | default: |
| 654 | dwc3_event_buffers_setup(dwc); |
| 655 | break; |
| 656 | } |
| 657 | |
| 658 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 659 | } |
| 660 | |
| 661 | static int dwc3_suspend(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 | |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 668 | switch (dwc->dr_mode) { |
| 669 | case USB_DR_MODE_PERIPHERAL: |
| 670 | case USB_DR_MODE_OTG: |
Felipe Balbi | 7415f17 | 2012-04-30 14:56:33 +0300 | [diff] [blame] | 671 | dwc3_gadget_suspend(dwc); |
| 672 | /* FALLTHROUGH */ |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 673 | case USB_DR_MODE_HOST: |
Felipe Balbi | 7415f17 | 2012-04-30 14:56:33 +0300 | [diff] [blame] | 674 | default: |
| 675 | /* do nothing */ |
| 676 | break; |
| 677 | } |
| 678 | |
| 679 | dwc->gctl = dwc3_readl(dwc->regs, DWC3_GCTL); |
| 680 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 681 | |
| 682 | usb_phy_shutdown(dwc->usb3_phy); |
| 683 | usb_phy_shutdown(dwc->usb2_phy); |
| 684 | |
| 685 | return 0; |
| 686 | } |
| 687 | |
| 688 | static int dwc3_resume(struct device *dev) |
| 689 | { |
| 690 | struct dwc3 *dwc = dev_get_drvdata(dev); |
| 691 | unsigned long flags; |
| 692 | |
| 693 | usb_phy_init(dwc->usb3_phy); |
| 694 | usb_phy_init(dwc->usb2_phy); |
| 695 | msleep(100); |
| 696 | |
| 697 | spin_lock_irqsave(&dwc->lock, flags); |
| 698 | |
| 699 | dwc3_writel(dwc->regs, DWC3_GCTL, dwc->gctl); |
| 700 | |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 701 | switch (dwc->dr_mode) { |
| 702 | case USB_DR_MODE_PERIPHERAL: |
| 703 | case USB_DR_MODE_OTG: |
Felipe Balbi | 7415f17 | 2012-04-30 14:56:33 +0300 | [diff] [blame] | 704 | dwc3_gadget_resume(dwc); |
| 705 | /* FALLTHROUGH */ |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 706 | case USB_DR_MODE_HOST: |
Felipe Balbi | 7415f17 | 2012-04-30 14:56:33 +0300 | [diff] [blame] | 707 | default: |
| 708 | /* do nothing */ |
| 709 | break; |
| 710 | } |
| 711 | |
| 712 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 713 | |
| 714 | pm_runtime_disable(dev); |
| 715 | pm_runtime_set_active(dev); |
| 716 | pm_runtime_enable(dev); |
| 717 | |
| 718 | return 0; |
| 719 | } |
| 720 | |
| 721 | static const struct dev_pm_ops dwc3_dev_pm_ops = { |
| 722 | .prepare = dwc3_prepare, |
| 723 | .complete = dwc3_complete, |
| 724 | |
| 725 | SET_SYSTEM_SLEEP_PM_OPS(dwc3_suspend, dwc3_resume) |
| 726 | }; |
| 727 | |
| 728 | #define DWC3_PM_OPS &(dwc3_dev_pm_ops) |
| 729 | #else |
| 730 | #define DWC3_PM_OPS NULL |
| 731 | #endif |
| 732 | |
Kishon Vijay Abraham I | 5088b6f | 2013-01-25 16:36:53 +0530 | [diff] [blame] | 733 | #ifdef CONFIG_OF |
| 734 | static const struct of_device_id of_dwc3_match[] = { |
| 735 | { |
Felipe Balbi | 22a5aa1 | 2013-07-02 21:20:24 +0300 | [diff] [blame] | 736 | .compatible = "snps,dwc3" |
| 737 | }, |
| 738 | { |
Kishon Vijay Abraham I | 5088b6f | 2013-01-25 16:36:53 +0530 | [diff] [blame] | 739 | .compatible = "synopsys,dwc3" |
| 740 | }, |
| 741 | { }, |
| 742 | }; |
| 743 | MODULE_DEVICE_TABLE(of, of_dwc3_match); |
| 744 | #endif |
| 745 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 746 | static struct platform_driver dwc3_driver = { |
| 747 | .probe = dwc3_probe, |
Bill Pemberton | 7690417 | 2012-11-19 13:21:08 -0500 | [diff] [blame] | 748 | .remove = dwc3_remove, |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 749 | .driver = { |
| 750 | .name = "dwc3", |
Kishon Vijay Abraham I | 5088b6f | 2013-01-25 16:36:53 +0530 | [diff] [blame] | 751 | .of_match_table = of_match_ptr(of_dwc3_match), |
Felipe Balbi | 7415f17 | 2012-04-30 14:56:33 +0300 | [diff] [blame] | 752 | .pm = DWC3_PM_OPS, |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 753 | }, |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 754 | }; |
| 755 | |
Tobias Klauser | b1116dc | 2012-02-28 12:57:20 +0100 | [diff] [blame] | 756 | module_platform_driver(dwc3_driver); |
| 757 | |
Sebastian Andrzej Siewior | 7ae4fc4 | 2011-10-19 19:39:50 +0200 | [diff] [blame] | 758 | MODULE_ALIAS("platform:dwc3"); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 759 | MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); |
Felipe Balbi | 5945f78 | 2013-06-30 14:15:11 +0300 | [diff] [blame] | 760 | MODULE_LICENSE("GPL v2"); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 761 | MODULE_DESCRIPTION("DesignWare USB3 DRD Controller Driver"); |