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 | |
| 36 | #include <linux/usb/ch9.h> |
| 37 | #include <linux/usb/gadget.h> |
Felipe Balbi | f7e846f | 2013-06-30 14:29:51 +0300 | [diff] [blame] | 38 | #include <linux/usb/of.h> |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 39 | #include <linux/usb/otg.h> |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 40 | |
Felipe Balbi | 6462cbd | 2013-06-30 14:19:33 +0300 | [diff] [blame] | 41 | #include "platform_data.h" |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 42 | #include "core.h" |
| 43 | #include "gadget.h" |
| 44 | #include "io.h" |
| 45 | |
| 46 | #include "debug.h" |
| 47 | |
Felipe Balbi | 8300dd2 | 2011-10-18 13:54:01 +0300 | [diff] [blame] | 48 | /* -------------------------------------------------------------------------- */ |
| 49 | |
Sebastian Andrzej Siewior | 3140e8c | 2011-10-31 22:25:40 +0100 | [diff] [blame] | 50 | void dwc3_set_mode(struct dwc3 *dwc, u32 mode) |
| 51 | { |
| 52 | u32 reg; |
| 53 | |
| 54 | reg = dwc3_readl(dwc->regs, DWC3_GCTL); |
| 55 | reg &= ~(DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_OTG)); |
| 56 | reg |= DWC3_GCTL_PRTCAPDIR(mode); |
| 57 | dwc3_writel(dwc->regs, DWC3_GCTL, reg); |
| 58 | } |
Felipe Balbi | 8300dd2 | 2011-10-18 13:54:01 +0300 | [diff] [blame] | 59 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 60 | /** |
| 61 | * dwc3_core_soft_reset - Issues core soft reset and PHY reset |
| 62 | * @dwc: pointer to our context structure |
| 63 | */ |
Kishon Vijay Abraham I | 5730348 | 2014-03-03 17:08:11 +0530 | [diff] [blame] | 64 | static int dwc3_core_soft_reset(struct dwc3 *dwc) |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 65 | { |
| 66 | u32 reg; |
Kishon Vijay Abraham I | 5730348 | 2014-03-03 17:08:11 +0530 | [diff] [blame] | 67 | int ret; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 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); |
Kishon Vijay Abraham I | 5730348 | 2014-03-03 17:08:11 +0530 | [diff] [blame] | 86 | ret = phy_init(dwc->usb2_generic_phy); |
| 87 | if (ret < 0) |
| 88 | return ret; |
| 89 | |
| 90 | ret = phy_init(dwc->usb3_generic_phy); |
| 91 | if (ret < 0) { |
| 92 | phy_exit(dwc->usb2_generic_phy); |
| 93 | return ret; |
| 94 | } |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 95 | mdelay(100); |
| 96 | |
| 97 | /* Clear USB3 PHY reset */ |
| 98 | reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); |
| 99 | reg &= ~DWC3_GUSB3PIPECTL_PHYSOFTRST; |
| 100 | dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); |
| 101 | |
| 102 | /* Clear USB2 PHY reset */ |
| 103 | reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); |
| 104 | reg &= ~DWC3_GUSB2PHYCFG_PHYSOFTRST; |
| 105 | dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); |
| 106 | |
Pratyush Anand | 45627ac | 2012-06-21 17:44:28 +0530 | [diff] [blame] | 107 | mdelay(100); |
| 108 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 109 | /* After PHYs are stable we can take Core out of reset state */ |
| 110 | reg = dwc3_readl(dwc->regs, DWC3_GCTL); |
| 111 | reg &= ~DWC3_GCTL_CORESOFTRESET; |
| 112 | dwc3_writel(dwc->regs, DWC3_GCTL, reg); |
Kishon Vijay Abraham I | 5730348 | 2014-03-03 17:08:11 +0530 | [diff] [blame] | 113 | |
| 114 | return 0; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 115 | } |
| 116 | |
| 117 | /** |
| 118 | * dwc3_free_one_event_buffer - Frees one event buffer |
| 119 | * @dwc: Pointer to our controller context structure |
| 120 | * @evt: Pointer to event buffer to be freed |
| 121 | */ |
| 122 | static void dwc3_free_one_event_buffer(struct dwc3 *dwc, |
| 123 | struct dwc3_event_buffer *evt) |
| 124 | { |
| 125 | dma_free_coherent(dwc->dev, evt->length, evt->buf, evt->dma); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 126 | } |
| 127 | |
| 128 | /** |
Paul Zimmerman | 1d04679 | 2012-02-15 18:56:56 -0800 | [diff] [blame] | 129 | * dwc3_alloc_one_event_buffer - Allocates one event buffer structure |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 130 | * @dwc: Pointer to our controller context structure |
| 131 | * @length: size of the event buffer |
| 132 | * |
Paul Zimmerman | 1d04679 | 2012-02-15 18:56:56 -0800 | [diff] [blame] | 133 | * Returns a pointer to the allocated event buffer structure on success |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 134 | * otherwise ERR_PTR(errno). |
| 135 | */ |
Felipe Balbi | 67d0b50 | 2013-02-22 16:31:07 +0200 | [diff] [blame] | 136 | static struct dwc3_event_buffer *dwc3_alloc_one_event_buffer(struct dwc3 *dwc, |
| 137 | unsigned length) |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 138 | { |
| 139 | struct dwc3_event_buffer *evt; |
| 140 | |
Felipe Balbi | 380f0d2 | 2012-10-11 13:48:36 +0300 | [diff] [blame] | 141 | evt = devm_kzalloc(dwc->dev, sizeof(*evt), GFP_KERNEL); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 142 | if (!evt) |
| 143 | return ERR_PTR(-ENOMEM); |
| 144 | |
| 145 | evt->dwc = dwc; |
| 146 | evt->length = length; |
| 147 | evt->buf = dma_alloc_coherent(dwc->dev, length, |
| 148 | &evt->dma, GFP_KERNEL); |
Felipe Balbi | e32672f | 2012-11-08 15:26:41 +0200 | [diff] [blame] | 149 | if (!evt->buf) |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 150 | return ERR_PTR(-ENOMEM); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 151 | |
| 152 | return evt; |
| 153 | } |
| 154 | |
| 155 | /** |
| 156 | * dwc3_free_event_buffers - frees all allocated event buffers |
| 157 | * @dwc: Pointer to our controller context structure |
| 158 | */ |
| 159 | static void dwc3_free_event_buffers(struct dwc3 *dwc) |
| 160 | { |
| 161 | struct dwc3_event_buffer *evt; |
| 162 | int i; |
| 163 | |
Felipe Balbi | 9f622b2 | 2011-10-12 10:31:04 +0300 | [diff] [blame] | 164 | for (i = 0; i < dwc->num_event_buffers; i++) { |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 165 | evt = dwc->ev_buffs[i]; |
Anton Tikhomirov | 64b6c8a | 2012-03-06 17:05:15 +0900 | [diff] [blame] | 166 | if (evt) |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 167 | dwc3_free_one_event_buffer(dwc, evt); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 168 | } |
| 169 | } |
| 170 | |
| 171 | /** |
| 172 | * dwc3_alloc_event_buffers - Allocates @num event buffers of size @length |
Paul Zimmerman | 1d04679 | 2012-02-15 18:56:56 -0800 | [diff] [blame] | 173 | * @dwc: pointer to our controller context structure |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 174 | * @length: size of event buffer |
| 175 | * |
Paul Zimmerman | 1d04679 | 2012-02-15 18:56:56 -0800 | [diff] [blame] | 176 | * Returns 0 on success otherwise negative errno. In the error case, dwc |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 177 | * may contain some buffers allocated but not all which were requested. |
| 178 | */ |
Bill Pemberton | 41ac7b3 | 2012-11-19 13:21:48 -0500 | [diff] [blame] | 179 | static int dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned length) |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 180 | { |
Felipe Balbi | 9f622b2 | 2011-10-12 10:31:04 +0300 | [diff] [blame] | 181 | int num; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 182 | int i; |
| 183 | |
Felipe Balbi | 9f622b2 | 2011-10-12 10:31:04 +0300 | [diff] [blame] | 184 | num = DWC3_NUM_INT(dwc->hwparams.hwparams1); |
| 185 | dwc->num_event_buffers = num; |
| 186 | |
Felipe Balbi | 380f0d2 | 2012-10-11 13:48:36 +0300 | [diff] [blame] | 187 | dwc->ev_buffs = devm_kzalloc(dwc->dev, sizeof(*dwc->ev_buffs) * num, |
| 188 | GFP_KERNEL); |
Felipe Balbi | 457d3f2 | 2011-10-24 12:03:13 +0300 | [diff] [blame] | 189 | if (!dwc->ev_buffs) { |
| 190 | dev_err(dwc->dev, "can't allocate event buffers array\n"); |
| 191 | return -ENOMEM; |
| 192 | } |
| 193 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 194 | for (i = 0; i < num; i++) { |
| 195 | struct dwc3_event_buffer *evt; |
| 196 | |
| 197 | evt = dwc3_alloc_one_event_buffer(dwc, length); |
| 198 | if (IS_ERR(evt)) { |
| 199 | dev_err(dwc->dev, "can't allocate event buffer\n"); |
| 200 | return PTR_ERR(evt); |
| 201 | } |
| 202 | dwc->ev_buffs[i] = evt; |
| 203 | } |
| 204 | |
| 205 | return 0; |
| 206 | } |
| 207 | |
| 208 | /** |
| 209 | * dwc3_event_buffers_setup - setup our allocated event buffers |
Paul Zimmerman | 1d04679 | 2012-02-15 18:56:56 -0800 | [diff] [blame] | 210 | * @dwc: pointer to our controller context structure |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 211 | * |
| 212 | * Returns 0 on success otherwise negative errno. |
| 213 | */ |
Paul Zimmerman | 7acd85e | 2012-04-27 14:28:02 +0300 | [diff] [blame] | 214 | static int dwc3_event_buffers_setup(struct dwc3 *dwc) |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 215 | { |
| 216 | struct dwc3_event_buffer *evt; |
| 217 | int n; |
| 218 | |
Felipe Balbi | 9f622b2 | 2011-10-12 10:31:04 +0300 | [diff] [blame] | 219 | for (n = 0; n < dwc->num_event_buffers; n++) { |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 220 | evt = dwc->ev_buffs[n]; |
| 221 | dev_dbg(dwc->dev, "Event buf %p dma %08llx length %d\n", |
| 222 | evt->buf, (unsigned long long) evt->dma, |
| 223 | evt->length); |
| 224 | |
Paul Zimmerman | 7acd85e | 2012-04-27 14:28:02 +0300 | [diff] [blame] | 225 | evt->lpos = 0; |
| 226 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 227 | dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(n), |
| 228 | lower_32_bits(evt->dma)); |
| 229 | dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(n), |
| 230 | upper_32_bits(evt->dma)); |
| 231 | dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(n), |
Felipe Balbi | 68d6a01 | 2013-06-12 21:09:26 +0300 | [diff] [blame] | 232 | DWC3_GEVNTSIZ_SIZE(evt->length)); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 233 | dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(n), 0); |
| 234 | } |
| 235 | |
| 236 | return 0; |
| 237 | } |
| 238 | |
| 239 | static void dwc3_event_buffers_cleanup(struct dwc3 *dwc) |
| 240 | { |
| 241 | struct dwc3_event_buffer *evt; |
| 242 | int n; |
| 243 | |
Felipe Balbi | 9f622b2 | 2011-10-12 10:31:04 +0300 | [diff] [blame] | 244 | for (n = 0; n < dwc->num_event_buffers; n++) { |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 245 | evt = dwc->ev_buffs[n]; |
Paul Zimmerman | 7acd85e | 2012-04-27 14:28:02 +0300 | [diff] [blame] | 246 | |
| 247 | evt->lpos = 0; |
| 248 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 249 | dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(n), 0); |
| 250 | dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(n), 0); |
Felipe Balbi | 68d6a01 | 2013-06-12 21:09:26 +0300 | [diff] [blame] | 251 | dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(n), DWC3_GEVNTSIZ_INTMASK |
| 252 | | DWC3_GEVNTSIZ_SIZE(0)); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 253 | dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(n), 0); |
| 254 | } |
| 255 | } |
| 256 | |
Felipe Balbi | 0ffcaf3 | 2013-12-19 13:04:28 -0600 | [diff] [blame] | 257 | static int dwc3_alloc_scratch_buffers(struct dwc3 *dwc) |
| 258 | { |
| 259 | if (!dwc->has_hibernation) |
| 260 | return 0; |
| 261 | |
| 262 | if (!dwc->nr_scratch) |
| 263 | return 0; |
| 264 | |
| 265 | dwc->scratchbuf = kmalloc_array(dwc->nr_scratch, |
| 266 | DWC3_SCRATCHBUF_SIZE, GFP_KERNEL); |
| 267 | if (!dwc->scratchbuf) |
| 268 | return -ENOMEM; |
| 269 | |
| 270 | return 0; |
| 271 | } |
| 272 | |
| 273 | static int dwc3_setup_scratch_buffers(struct dwc3 *dwc) |
| 274 | { |
| 275 | dma_addr_t scratch_addr; |
| 276 | u32 param; |
| 277 | int ret; |
| 278 | |
| 279 | if (!dwc->has_hibernation) |
| 280 | return 0; |
| 281 | |
| 282 | if (!dwc->nr_scratch) |
| 283 | return 0; |
| 284 | |
| 285 | /* should never fall here */ |
| 286 | if (!WARN_ON(dwc->scratchbuf)) |
| 287 | return 0; |
| 288 | |
| 289 | scratch_addr = dma_map_single(dwc->dev, dwc->scratchbuf, |
| 290 | dwc->nr_scratch * DWC3_SCRATCHBUF_SIZE, |
| 291 | DMA_BIDIRECTIONAL); |
| 292 | if (dma_mapping_error(dwc->dev, scratch_addr)) { |
| 293 | dev_err(dwc->dev, "failed to map scratch buffer\n"); |
| 294 | ret = -EFAULT; |
| 295 | goto err0; |
| 296 | } |
| 297 | |
| 298 | dwc->scratch_addr = scratch_addr; |
| 299 | |
| 300 | param = lower_32_bits(scratch_addr); |
| 301 | |
| 302 | ret = dwc3_send_gadget_generic_command(dwc, |
| 303 | DWC3_DGCMD_SET_SCRATCHPAD_ADDR_LO, param); |
| 304 | if (ret < 0) |
| 305 | goto err1; |
| 306 | |
| 307 | param = upper_32_bits(scratch_addr); |
| 308 | |
| 309 | ret = dwc3_send_gadget_generic_command(dwc, |
| 310 | DWC3_DGCMD_SET_SCRATCHPAD_ADDR_HI, param); |
| 311 | if (ret < 0) |
| 312 | goto err1; |
| 313 | |
| 314 | return 0; |
| 315 | |
| 316 | err1: |
| 317 | dma_unmap_single(dwc->dev, dwc->scratch_addr, dwc->nr_scratch * |
| 318 | DWC3_SCRATCHBUF_SIZE, DMA_BIDIRECTIONAL); |
| 319 | |
| 320 | err0: |
| 321 | return ret; |
| 322 | } |
| 323 | |
| 324 | static void dwc3_free_scratch_buffers(struct dwc3 *dwc) |
| 325 | { |
| 326 | if (!dwc->has_hibernation) |
| 327 | return; |
| 328 | |
| 329 | if (!dwc->nr_scratch) |
| 330 | return; |
| 331 | |
| 332 | /* should never fall here */ |
| 333 | if (!WARN_ON(dwc->scratchbuf)) |
| 334 | return; |
| 335 | |
| 336 | dma_unmap_single(dwc->dev, dwc->scratch_addr, dwc->nr_scratch * |
| 337 | DWC3_SCRATCHBUF_SIZE, DMA_BIDIRECTIONAL); |
| 338 | kfree(dwc->scratchbuf); |
| 339 | } |
| 340 | |
Felipe Balbi | 789451f6 | 2011-05-05 15:53:10 +0300 | [diff] [blame] | 341 | static void dwc3_core_num_eps(struct dwc3 *dwc) |
| 342 | { |
| 343 | struct dwc3_hwparams *parms = &dwc->hwparams; |
| 344 | |
| 345 | dwc->num_in_eps = DWC3_NUM_IN_EPS(parms); |
| 346 | dwc->num_out_eps = DWC3_NUM_EPS(parms) - dwc->num_in_eps; |
| 347 | |
| 348 | dev_vdbg(dwc->dev, "found %d IN and %d OUT endpoints\n", |
| 349 | dwc->num_in_eps, dwc->num_out_eps); |
| 350 | } |
| 351 | |
Bill Pemberton | 41ac7b3 | 2012-11-19 13:21:48 -0500 | [diff] [blame] | 352 | static void dwc3_cache_hwparams(struct dwc3 *dwc) |
Felipe Balbi | 26ceca9 | 2011-09-30 10:58:49 +0300 | [diff] [blame] | 353 | { |
| 354 | struct dwc3_hwparams *parms = &dwc->hwparams; |
| 355 | |
| 356 | parms->hwparams0 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS0); |
| 357 | parms->hwparams1 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS1); |
| 358 | parms->hwparams2 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS2); |
| 359 | parms->hwparams3 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS3); |
| 360 | parms->hwparams4 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS4); |
| 361 | parms->hwparams5 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS5); |
| 362 | parms->hwparams6 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS6); |
| 363 | parms->hwparams7 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS7); |
| 364 | parms->hwparams8 = dwc3_readl(dwc->regs, DWC3_GHWPARAMS8); |
| 365 | } |
| 366 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 367 | /** |
| 368 | * dwc3_core_init - Low-level initialization of DWC3 Core |
| 369 | * @dwc: Pointer to our controller context structure |
| 370 | * |
| 371 | * Returns 0 on success otherwise negative errno. |
| 372 | */ |
Bill Pemberton | 41ac7b3 | 2012-11-19 13:21:48 -0500 | [diff] [blame] | 373 | static int dwc3_core_init(struct dwc3 *dwc) |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 374 | { |
| 375 | unsigned long timeout; |
Felipe Balbi | 0ffcaf3 | 2013-12-19 13:04:28 -0600 | [diff] [blame] | 376 | u32 hwparams4 = dwc->hwparams.hwparams4; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 377 | u32 reg; |
| 378 | int ret; |
| 379 | |
Sebastian Andrzej Siewior | 7650bd7 | 2011-08-29 13:56:36 +0200 | [diff] [blame] | 380 | reg = dwc3_readl(dwc->regs, DWC3_GSNPSID); |
| 381 | /* This should read as U3 followed by revision number */ |
| 382 | if ((reg & DWC3_GSNPSID_MASK) != 0x55330000) { |
| 383 | dev_err(dwc->dev, "this is not a DesignWare USB3 DRD Core\n"); |
| 384 | ret = -ENODEV; |
| 385 | goto err0; |
| 386 | } |
Felipe Balbi | 248b122 | 2011-12-14 21:59:30 +0200 | [diff] [blame] | 387 | dwc->revision = reg; |
Sebastian Andrzej Siewior | 7650bd7 | 2011-08-29 13:56:36 +0200 | [diff] [blame] | 388 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 389 | /* issue device SoftReset too */ |
| 390 | timeout = jiffies + msecs_to_jiffies(500); |
| 391 | dwc3_writel(dwc->regs, DWC3_DCTL, DWC3_DCTL_CSFTRST); |
| 392 | do { |
| 393 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); |
| 394 | if (!(reg & DWC3_DCTL_CSFTRST)) |
| 395 | break; |
| 396 | |
| 397 | if (time_after(jiffies, timeout)) { |
| 398 | dev_err(dwc->dev, "Reset Timed Out\n"); |
| 399 | ret = -ETIMEDOUT; |
| 400 | goto err0; |
| 401 | } |
| 402 | |
| 403 | cpu_relax(); |
| 404 | } while (true); |
| 405 | |
Kishon Vijay Abraham I | 5730348 | 2014-03-03 17:08:11 +0530 | [diff] [blame] | 406 | ret = dwc3_core_soft_reset(dwc); |
| 407 | if (ret) |
| 408 | goto err0; |
Pratyush Anand | 58a0f23 | 2012-06-21 17:44:29 +0530 | [diff] [blame] | 409 | |
Sebastian Andrzej Siewior | 4878a02 | 2011-10-31 22:25:41 +0100 | [diff] [blame] | 410 | reg = dwc3_readl(dwc->regs, DWC3_GCTL); |
Paul Zimmerman | 3e87c42 | 2012-02-24 17:32:13 -0800 | [diff] [blame] | 411 | reg &= ~DWC3_GCTL_SCALEDOWN_MASK; |
Sebastian Andrzej Siewior | 4878a02 | 2011-10-31 22:25:41 +0100 | [diff] [blame] | 412 | reg &= ~DWC3_GCTL_DISSCRAMBLE; |
| 413 | |
Sebastian Andrzej Siewior | 164d773 | 2011-11-24 11:22:05 +0100 | [diff] [blame] | 414 | switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams1)) { |
Sebastian Andrzej Siewior | 4878a02 | 2011-10-31 22:25:41 +0100 | [diff] [blame] | 415 | case DWC3_GHWPARAMS1_EN_PWROPT_CLK: |
Felipe Balbi | 32a4a13 | 2014-02-25 14:00:13 -0600 | [diff] [blame] | 416 | /** |
| 417 | * WORKAROUND: DWC3 revisions between 2.10a and 2.50a have an |
| 418 | * issue which would cause xHCI compliance tests to fail. |
| 419 | * |
| 420 | * Because of that we cannot enable clock gating on such |
| 421 | * configurations. |
| 422 | * |
| 423 | * Refers to: |
| 424 | * |
| 425 | * STAR#9000588375: Clock Gating, SOF Issues when ref_clk-Based |
| 426 | * SOF/ITP Mode Used |
| 427 | */ |
| 428 | if ((dwc->dr_mode == USB_DR_MODE_HOST || |
| 429 | dwc->dr_mode == USB_DR_MODE_OTG) && |
| 430 | (dwc->revision >= DWC3_REVISION_210A && |
| 431 | dwc->revision <= DWC3_REVISION_250A)) |
| 432 | reg |= DWC3_GCTL_DSBLCLKGTNG | DWC3_GCTL_SOFITPSYNC; |
| 433 | else |
| 434 | reg &= ~DWC3_GCTL_DSBLCLKGTNG; |
Sebastian Andrzej Siewior | 4878a02 | 2011-10-31 22:25:41 +0100 | [diff] [blame] | 435 | break; |
Felipe Balbi | 0ffcaf3 | 2013-12-19 13:04:28 -0600 | [diff] [blame] | 436 | case DWC3_GHWPARAMS1_EN_PWROPT_HIB: |
| 437 | /* enable hibernation here */ |
| 438 | dwc->nr_scratch = DWC3_GHWPARAMS4_HIBER_SCRATCHBUFS(hwparams4); |
| 439 | break; |
Sebastian Andrzej Siewior | 4878a02 | 2011-10-31 22:25:41 +0100 | [diff] [blame] | 440 | default: |
| 441 | dev_dbg(dwc->dev, "No power optimization available\n"); |
| 442 | } |
| 443 | |
| 444 | /* |
| 445 | * WORKAROUND: DWC3 revisions <1.90a have a bug |
Paul Zimmerman | 1d04679 | 2012-02-15 18:56:56 -0800 | [diff] [blame] | 446 | * where the device can fail to connect at SuperSpeed |
Sebastian Andrzej Siewior | 4878a02 | 2011-10-31 22:25:41 +0100 | [diff] [blame] | 447 | * and falls back to high-speed mode which causes |
Paul Zimmerman | 1d04679 | 2012-02-15 18:56:56 -0800 | [diff] [blame] | 448 | * the device to enter a Connect/Disconnect loop |
Sebastian Andrzej Siewior | 4878a02 | 2011-10-31 22:25:41 +0100 | [diff] [blame] | 449 | */ |
| 450 | if (dwc->revision < DWC3_REVISION_190A) |
| 451 | reg |= DWC3_GCTL_U2RSTECN; |
| 452 | |
Felipe Balbi | 789451f6 | 2011-05-05 15:53:10 +0300 | [diff] [blame] | 453 | dwc3_core_num_eps(dwc); |
| 454 | |
Sebastian Andrzej Siewior | 4878a02 | 2011-10-31 22:25:41 +0100 | [diff] [blame] | 455 | dwc3_writel(dwc->regs, DWC3_GCTL, reg); |
| 456 | |
Felipe Balbi | 0ffcaf3 | 2013-12-19 13:04:28 -0600 | [diff] [blame] | 457 | ret = dwc3_alloc_scratch_buffers(dwc); |
| 458 | if (ret) |
| 459 | goto err1; |
| 460 | |
| 461 | ret = dwc3_setup_scratch_buffers(dwc); |
| 462 | if (ret) |
| 463 | goto err2; |
| 464 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 465 | return 0; |
| 466 | |
Felipe Balbi | 0ffcaf3 | 2013-12-19 13:04:28 -0600 | [diff] [blame] | 467 | err2: |
| 468 | dwc3_free_scratch_buffers(dwc); |
| 469 | |
| 470 | err1: |
| 471 | usb_phy_shutdown(dwc->usb2_phy); |
| 472 | usb_phy_shutdown(dwc->usb3_phy); |
Kishon Vijay Abraham I | 5730348 | 2014-03-03 17:08:11 +0530 | [diff] [blame] | 473 | phy_exit(dwc->usb2_generic_phy); |
| 474 | phy_exit(dwc->usb3_generic_phy); |
Felipe Balbi | 0ffcaf3 | 2013-12-19 13:04:28 -0600 | [diff] [blame] | 475 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 476 | err0: |
| 477 | return ret; |
| 478 | } |
| 479 | |
| 480 | static void dwc3_core_exit(struct dwc3 *dwc) |
| 481 | { |
Felipe Balbi | 0ffcaf3 | 2013-12-19 13:04:28 -0600 | [diff] [blame] | 482 | dwc3_free_scratch_buffers(dwc); |
Vivek Gautam | 01b8daf | 2012-10-13 19:20:18 +0530 | [diff] [blame] | 483 | usb_phy_shutdown(dwc->usb2_phy); |
| 484 | usb_phy_shutdown(dwc->usb3_phy); |
Kishon Vijay Abraham I | 5730348 | 2014-03-03 17:08:11 +0530 | [diff] [blame] | 485 | phy_exit(dwc->usb2_generic_phy); |
| 486 | phy_exit(dwc->usb3_generic_phy); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 487 | } |
| 488 | |
Felipe Balbi | 3c9f94a | 2014-04-16 15:08:29 -0500 | [diff] [blame] | 489 | static int dwc3_core_get_phy(struct dwc3 *dwc) |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 490 | { |
Felipe Balbi | 3c9f94a | 2014-04-16 15:08:29 -0500 | [diff] [blame] | 491 | struct device *dev = dwc->dev; |
Felipe Balbi | 941ea36 | 2013-07-31 09:21:25 +0300 | [diff] [blame] | 492 | struct device_node *node = dev->of_node; |
Felipe Balbi | 3c9f94a | 2014-04-16 15:08:29 -0500 | [diff] [blame] | 493 | int ret; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 494 | |
Kishon Vijay Abraham I | 5088b6f | 2013-01-25 16:36:53 +0530 | [diff] [blame] | 495 | if (node) { |
| 496 | dwc->usb2_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 0); |
| 497 | dwc->usb3_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 1); |
Felipe Balbi | bb67490 | 2013-08-14 13:21:23 -0500 | [diff] [blame] | 498 | } else { |
| 499 | dwc->usb2_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2); |
| 500 | 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] | 501 | } |
| 502 | |
Felipe Balbi | d105e7f | 2013-03-15 10:52:08 +0200 | [diff] [blame] | 503 | if (IS_ERR(dwc->usb2_phy)) { |
| 504 | ret = PTR_ERR(dwc->usb2_phy); |
Kishon Vijay Abraham I | 122f06e | 2014-03-03 17:08:10 +0530 | [diff] [blame] | 505 | if (ret == -ENXIO || ret == -ENODEV) { |
| 506 | dwc->usb2_phy = NULL; |
| 507 | } else if (ret == -EPROBE_DEFER) { |
Felipe Balbi | d105e7f | 2013-03-15 10:52:08 +0200 | [diff] [blame] | 508 | return ret; |
Kishon Vijay Abraham I | 122f06e | 2014-03-03 17:08:10 +0530 | [diff] [blame] | 509 | } else { |
| 510 | dev_err(dev, "no usb2 phy configured\n"); |
| 511 | return ret; |
| 512 | } |
Felipe Balbi | 51e1e7b | 2012-07-19 14:09:48 +0300 | [diff] [blame] | 513 | } |
| 514 | |
Felipe Balbi | d105e7f | 2013-03-15 10:52:08 +0200 | [diff] [blame] | 515 | if (IS_ERR(dwc->usb3_phy)) { |
Ruchika Kharwar | 315955d7 | 2013-07-04 00:59:34 -0500 | [diff] [blame] | 516 | ret = PTR_ERR(dwc->usb3_phy); |
Kishon Vijay Abraham I | 122f06e | 2014-03-03 17:08:10 +0530 | [diff] [blame] | 517 | if (ret == -ENXIO || ret == -ENODEV) { |
| 518 | dwc->usb3_phy = NULL; |
| 519 | } else if (ret == -EPROBE_DEFER) { |
Felipe Balbi | d105e7f | 2013-03-15 10:52:08 +0200 | [diff] [blame] | 520 | return ret; |
Kishon Vijay Abraham I | 122f06e | 2014-03-03 17:08:10 +0530 | [diff] [blame] | 521 | } else { |
| 522 | dev_err(dev, "no usb3 phy configured\n"); |
| 523 | return ret; |
| 524 | } |
Felipe Balbi | 51e1e7b | 2012-07-19 14:09:48 +0300 | [diff] [blame] | 525 | } |
| 526 | |
Kishon Vijay Abraham I | 5730348 | 2014-03-03 17:08:11 +0530 | [diff] [blame] | 527 | dwc->usb2_generic_phy = devm_phy_get(dev, "usb2-phy"); |
| 528 | if (IS_ERR(dwc->usb2_generic_phy)) { |
| 529 | ret = PTR_ERR(dwc->usb2_generic_phy); |
| 530 | if (ret == -ENOSYS || ret == -ENODEV) { |
| 531 | dwc->usb2_generic_phy = NULL; |
| 532 | } else if (ret == -EPROBE_DEFER) { |
| 533 | return ret; |
| 534 | } else { |
| 535 | dev_err(dev, "no usb2 phy configured\n"); |
| 536 | return ret; |
| 537 | } |
| 538 | } |
| 539 | |
| 540 | dwc->usb3_generic_phy = devm_phy_get(dev, "usb3-phy"); |
| 541 | if (IS_ERR(dwc->usb3_generic_phy)) { |
| 542 | ret = PTR_ERR(dwc->usb3_generic_phy); |
| 543 | if (ret == -ENOSYS || ret == -ENODEV) { |
| 544 | dwc->usb3_generic_phy = NULL; |
| 545 | } else if (ret == -EPROBE_DEFER) { |
| 546 | return ret; |
| 547 | } else { |
| 548 | dev_err(dev, "no usb3 phy configured\n"); |
| 549 | return ret; |
| 550 | } |
| 551 | } |
| 552 | |
Felipe Balbi | 3c9f94a | 2014-04-16 15:08:29 -0500 | [diff] [blame] | 553 | return 0; |
| 554 | } |
| 555 | |
Felipe Balbi | 5f94adf | 2014-04-16 15:13:45 -0500 | [diff] [blame^] | 556 | static int dwc3_core_init_mode(struct dwc3 *dwc) |
| 557 | { |
| 558 | struct device *dev = dwc->dev; |
| 559 | int ret; |
| 560 | |
| 561 | switch (dwc->dr_mode) { |
| 562 | case USB_DR_MODE_PERIPHERAL: |
| 563 | dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE); |
| 564 | ret = dwc3_gadget_init(dwc); |
| 565 | if (ret) { |
| 566 | dev_err(dev, "failed to initialize gadget\n"); |
| 567 | return ret; |
| 568 | } |
| 569 | break; |
| 570 | case USB_DR_MODE_HOST: |
| 571 | dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_HOST); |
| 572 | ret = dwc3_host_init(dwc); |
| 573 | if (ret) { |
| 574 | dev_err(dev, "failed to initialize host\n"); |
| 575 | return ret; |
| 576 | } |
| 577 | break; |
| 578 | case USB_DR_MODE_OTG: |
| 579 | dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_OTG); |
| 580 | ret = dwc3_host_init(dwc); |
| 581 | if (ret) { |
| 582 | dev_err(dev, "failed to initialize host\n"); |
| 583 | return ret; |
| 584 | } |
| 585 | |
| 586 | ret = dwc3_gadget_init(dwc); |
| 587 | if (ret) { |
| 588 | dev_err(dev, "failed to initialize gadget\n"); |
| 589 | return ret; |
| 590 | } |
| 591 | break; |
| 592 | default: |
| 593 | dev_err(dev, "Unsupported mode of operation %d\n", dwc->dr_mode); |
| 594 | return -EINVAL; |
| 595 | } |
| 596 | |
| 597 | return 0; |
| 598 | } |
| 599 | |
| 600 | static void dwc3_core_exit_mode(struct dwc3 *dwc) |
| 601 | { |
| 602 | switch (dwc->dr_mode) { |
| 603 | case USB_DR_MODE_PERIPHERAL: |
| 604 | dwc3_gadget_exit(dwc); |
| 605 | break; |
| 606 | case USB_DR_MODE_HOST: |
| 607 | dwc3_host_exit(dwc); |
| 608 | break; |
| 609 | case USB_DR_MODE_OTG: |
| 610 | dwc3_host_exit(dwc); |
| 611 | dwc3_gadget_exit(dwc); |
| 612 | break; |
| 613 | default: |
| 614 | /* do nothing */ |
| 615 | break; |
| 616 | } |
| 617 | } |
| 618 | |
Felipe Balbi | 3c9f94a | 2014-04-16 15:08:29 -0500 | [diff] [blame] | 619 | #define DWC3_ALIGN_MASK (16 - 1) |
| 620 | |
| 621 | static int dwc3_probe(struct platform_device *pdev) |
| 622 | { |
| 623 | struct device *dev = &pdev->dev; |
| 624 | struct dwc3_platform_data *pdata = dev_get_platdata(dev); |
| 625 | struct device_node *node = dev->of_node; |
| 626 | struct resource *res; |
| 627 | struct dwc3 *dwc; |
| 628 | |
| 629 | int ret = -ENOMEM; |
| 630 | |
| 631 | void __iomem *regs; |
| 632 | void *mem; |
| 633 | |
| 634 | mem = devm_kzalloc(dev, sizeof(*dwc) + DWC3_ALIGN_MASK, GFP_KERNEL); |
| 635 | if (!mem) { |
| 636 | dev_err(dev, "not enough memory\n"); |
| 637 | return -ENOMEM; |
| 638 | } |
| 639 | dwc = PTR_ALIGN(mem, DWC3_ALIGN_MASK + 1); |
| 640 | dwc->mem = mem; |
| 641 | dwc->dev = dev; |
| 642 | |
| 643 | res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); |
| 644 | if (!res) { |
| 645 | dev_err(dev, "missing IRQ\n"); |
| 646 | return -ENODEV; |
| 647 | } |
| 648 | dwc->xhci_resources[1].start = res->start; |
| 649 | dwc->xhci_resources[1].end = res->end; |
| 650 | dwc->xhci_resources[1].flags = res->flags; |
| 651 | dwc->xhci_resources[1].name = res->name; |
| 652 | |
| 653 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 654 | if (!res) { |
| 655 | dev_err(dev, "missing memory resource\n"); |
| 656 | return -ENODEV; |
| 657 | } |
| 658 | |
| 659 | if (node) { |
| 660 | dwc->maximum_speed = of_usb_get_maximum_speed(node); |
| 661 | |
| 662 | dwc->needs_fifo_resize = of_property_read_bool(node, "tx-fifo-resize"); |
| 663 | dwc->dr_mode = of_usb_get_dr_mode(node); |
| 664 | } else if (pdata) { |
| 665 | dwc->maximum_speed = pdata->maximum_speed; |
| 666 | |
| 667 | dwc->needs_fifo_resize = pdata->tx_fifo_resize; |
| 668 | dwc->dr_mode = pdata->dr_mode; |
| 669 | } |
| 670 | |
| 671 | /* default to superspeed if no maximum_speed passed */ |
| 672 | if (dwc->maximum_speed == USB_SPEED_UNKNOWN) |
| 673 | dwc->maximum_speed = USB_SPEED_SUPER; |
| 674 | |
| 675 | ret = dwc3_core_get_phy(dwc); |
| 676 | if (ret) |
| 677 | return ret; |
| 678 | |
Ivan T. Ivanov | 2e11234 | 2013-07-29 10:27:02 +0300 | [diff] [blame] | 679 | dwc->xhci_resources[0].start = res->start; |
| 680 | dwc->xhci_resources[0].end = dwc->xhci_resources[0].start + |
| 681 | DWC3_XHCI_REGS_END; |
| 682 | dwc->xhci_resources[0].flags = res->flags; |
| 683 | dwc->xhci_resources[0].name = res->name; |
| 684 | |
| 685 | res->start += DWC3_GLOBALS_REGS_START; |
| 686 | |
| 687 | /* |
| 688 | * Request memory region but exclude xHCI regs, |
| 689 | * since it will be requested by the xhci-plat driver. |
| 690 | */ |
| 691 | regs = devm_ioremap_resource(dev, res); |
| 692 | if (IS_ERR(regs)) |
| 693 | return PTR_ERR(regs); |
| 694 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 695 | spin_lock_init(&dwc->lock); |
| 696 | platform_set_drvdata(pdev, dwc); |
| 697 | |
| 698 | dwc->regs = regs; |
| 699 | dwc->regs_size = resource_size(res); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 700 | |
Kishon Vijay Abraham I | ddff14f | 2013-03-07 18:51:43 +0530 | [diff] [blame] | 701 | dev->dma_mask = dev->parent->dma_mask; |
| 702 | dev->dma_parms = dev->parent->dma_parms; |
| 703 | dma_set_coherent_mask(dev, dev->parent->coherent_dma_mask); |
| 704 | |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 705 | pm_runtime_enable(dev); |
| 706 | pm_runtime_get_sync(dev); |
| 707 | pm_runtime_forbid(dev); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 708 | |
Kishon Vijay Abraham I | 4fd2448 | 2012-11-16 12:07:54 +0530 | [diff] [blame] | 709 | dwc3_cache_hwparams(dwc); |
| 710 | |
Felipe Balbi | 3921426 | 2012-10-11 13:54:36 +0300 | [diff] [blame] | 711 | ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE); |
| 712 | if (ret) { |
| 713 | dev_err(dwc->dev, "failed to allocate event buffers\n"); |
| 714 | ret = -ENOMEM; |
| 715 | goto err0; |
| 716 | } |
| 717 | |
Felipe Balbi | 32a4a13 | 2014-02-25 14:00:13 -0600 | [diff] [blame] | 718 | if (IS_ENABLED(CONFIG_USB_DWC3_HOST)) |
| 719 | dwc->dr_mode = USB_DR_MODE_HOST; |
| 720 | else if (IS_ENABLED(CONFIG_USB_DWC3_GADGET)) |
| 721 | dwc->dr_mode = USB_DR_MODE_PERIPHERAL; |
| 722 | |
| 723 | if (dwc->dr_mode == USB_DR_MODE_UNKNOWN) |
| 724 | dwc->dr_mode = USB_DR_MODE_OTG; |
| 725 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 726 | ret = dwc3_core_init(dwc); |
| 727 | if (ret) { |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 728 | dev_err(dev, "failed to initialize core\n"); |
Felipe Balbi | 3921426 | 2012-10-11 13:54:36 +0300 | [diff] [blame] | 729 | goto err0; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 730 | } |
| 731 | |
Kishon Vijay Abraham I | 3088f10 | 2013-11-25 15:31:21 +0530 | [diff] [blame] | 732 | usb_phy_set_suspend(dwc->usb2_phy, 0); |
| 733 | usb_phy_set_suspend(dwc->usb3_phy, 0); |
Kishon Vijay Abraham I | 5730348 | 2014-03-03 17:08:11 +0530 | [diff] [blame] | 734 | ret = phy_power_on(dwc->usb2_generic_phy); |
| 735 | if (ret < 0) |
| 736 | goto err1; |
| 737 | |
| 738 | ret = phy_power_on(dwc->usb3_generic_phy); |
| 739 | if (ret < 0) |
| 740 | goto err_usb2phy_power; |
Kishon Vijay Abraham I | 3088f10 | 2013-11-25 15:31:21 +0530 | [diff] [blame] | 741 | |
Felipe Balbi | f122d33 | 2013-02-08 15:15:11 +0200 | [diff] [blame] | 742 | ret = dwc3_event_buffers_setup(dwc); |
| 743 | if (ret) { |
| 744 | dev_err(dwc->dev, "failed to setup event buffers\n"); |
Kishon Vijay Abraham I | 5730348 | 2014-03-03 17:08:11 +0530 | [diff] [blame] | 745 | goto err_usb3phy_power; |
Felipe Balbi | f122d33 | 2013-02-08 15:15:11 +0200 | [diff] [blame] | 746 | } |
| 747 | |
Felipe Balbi | 5f94adf | 2014-04-16 15:13:45 -0500 | [diff] [blame^] | 748 | ret = dwc3_core_init_mode(dwc); |
| 749 | if (ret) |
Felipe Balbi | f122d33 | 2013-02-08 15:15:11 +0200 | [diff] [blame] | 750 | goto err2; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 751 | |
| 752 | ret = dwc3_debugfs_init(dwc); |
| 753 | if (ret) { |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 754 | dev_err(dev, "failed to initialize debugfs\n"); |
Felipe Balbi | f122d33 | 2013-02-08 15:15:11 +0200 | [diff] [blame] | 755 | goto err3; |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 756 | } |
| 757 | |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 758 | pm_runtime_allow(dev); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 759 | |
| 760 | return 0; |
| 761 | |
Felipe Balbi | f122d33 | 2013-02-08 15:15:11 +0200 | [diff] [blame] | 762 | err3: |
Felipe Balbi | 5f94adf | 2014-04-16 15:13:45 -0500 | [diff] [blame^] | 763 | dwc3_core_exit_mode(dwc); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 764 | |
Felipe Balbi | f122d33 | 2013-02-08 15:15:11 +0200 | [diff] [blame] | 765 | err2: |
| 766 | dwc3_event_buffers_cleanup(dwc); |
| 767 | |
Kishon Vijay Abraham I | 5730348 | 2014-03-03 17:08:11 +0530 | [diff] [blame] | 768 | err_usb3phy_power: |
| 769 | phy_power_off(dwc->usb3_generic_phy); |
| 770 | |
| 771 | err_usb2phy_power: |
| 772 | phy_power_off(dwc->usb2_generic_phy); |
| 773 | |
Chanho Park | 802ca85 | 2012-02-15 18:27:55 +0900 | [diff] [blame] | 774 | err1: |
Kishon Vijay Abraham I | 501fae5 | 2013-11-25 15:31:22 +0530 | [diff] [blame] | 775 | usb_phy_set_suspend(dwc->usb2_phy, 1); |
| 776 | usb_phy_set_suspend(dwc->usb3_phy, 1); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 777 | dwc3_core_exit(dwc); |
| 778 | |
Felipe Balbi | 3921426 | 2012-10-11 13:54:36 +0300 | [diff] [blame] | 779 | err0: |
| 780 | dwc3_free_event_buffers(dwc); |
| 781 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 782 | return ret; |
| 783 | } |
| 784 | |
Bill Pemberton | fb4e98a | 2012-11-19 13:26:20 -0500 | [diff] [blame] | 785 | static int dwc3_remove(struct platform_device *pdev) |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 786 | { |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 787 | struct dwc3 *dwc = platform_get_drvdata(pdev); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 788 | |
Kishon Vijay Abraham I | 8ba007a | 2013-01-25 08:30:54 +0530 | [diff] [blame] | 789 | usb_phy_set_suspend(dwc->usb2_phy, 1); |
| 790 | usb_phy_set_suspend(dwc->usb3_phy, 1); |
Kishon Vijay Abraham I | 5730348 | 2014-03-03 17:08:11 +0530 | [diff] [blame] | 791 | phy_power_off(dwc->usb2_generic_phy); |
| 792 | phy_power_off(dwc->usb3_generic_phy); |
Kishon Vijay Abraham I | 8ba007a | 2013-01-25 08:30:54 +0530 | [diff] [blame] | 793 | |
Felipe Balbi | 16b972a | 2013-10-11 08:34:28 -0500 | [diff] [blame] | 794 | pm_runtime_put_sync(&pdev->dev); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 795 | pm_runtime_disable(&pdev->dev); |
| 796 | |
| 797 | dwc3_debugfs_exit(dwc); |
Felipe Balbi | 5f94adf | 2014-04-16 15:13:45 -0500 | [diff] [blame^] | 798 | dwc3_core_exit_mode(dwc); |
Felipe Balbi | f122d33 | 2013-02-08 15:15:11 +0200 | [diff] [blame] | 799 | dwc3_event_buffers_cleanup(dwc); |
Felipe Balbi | d9b4330 | 2013-02-08 15:14:16 +0200 | [diff] [blame] | 800 | dwc3_free_event_buffers(dwc); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 801 | dwc3_core_exit(dwc); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 802 | |
| 803 | return 0; |
| 804 | } |
| 805 | |
Jingoo Han | 19fda7c | 2013-03-26 01:52:48 +0000 | [diff] [blame] | 806 | #ifdef CONFIG_PM_SLEEP |
Felipe Balbi | 7415f17 | 2012-04-30 14:56:33 +0300 | [diff] [blame] | 807 | static int dwc3_prepare(struct device *dev) |
| 808 | { |
| 809 | struct dwc3 *dwc = dev_get_drvdata(dev); |
| 810 | unsigned long flags; |
| 811 | |
| 812 | spin_lock_irqsave(&dwc->lock, flags); |
| 813 | |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 814 | switch (dwc->dr_mode) { |
| 815 | case USB_DR_MODE_PERIPHERAL: |
| 816 | case USB_DR_MODE_OTG: |
Felipe Balbi | 7415f17 | 2012-04-30 14:56:33 +0300 | [diff] [blame] | 817 | dwc3_gadget_prepare(dwc); |
| 818 | /* FALLTHROUGH */ |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 819 | case USB_DR_MODE_HOST: |
Felipe Balbi | 7415f17 | 2012-04-30 14:56:33 +0300 | [diff] [blame] | 820 | default: |
| 821 | dwc3_event_buffers_cleanup(dwc); |
| 822 | break; |
| 823 | } |
| 824 | |
| 825 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 826 | |
| 827 | return 0; |
| 828 | } |
| 829 | |
| 830 | static void dwc3_complete(struct device *dev) |
| 831 | { |
| 832 | struct dwc3 *dwc = dev_get_drvdata(dev); |
| 833 | unsigned long flags; |
| 834 | |
| 835 | spin_lock_irqsave(&dwc->lock, flags); |
| 836 | |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 837 | switch (dwc->dr_mode) { |
| 838 | case USB_DR_MODE_PERIPHERAL: |
| 839 | case USB_DR_MODE_OTG: |
Felipe Balbi | 7415f17 | 2012-04-30 14:56:33 +0300 | [diff] [blame] | 840 | dwc3_gadget_complete(dwc); |
| 841 | /* FALLTHROUGH */ |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 842 | case USB_DR_MODE_HOST: |
Felipe Balbi | 7415f17 | 2012-04-30 14:56:33 +0300 | [diff] [blame] | 843 | default: |
| 844 | dwc3_event_buffers_setup(dwc); |
| 845 | break; |
| 846 | } |
| 847 | |
| 848 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 849 | } |
| 850 | |
| 851 | static int dwc3_suspend(struct device *dev) |
| 852 | { |
| 853 | struct dwc3 *dwc = dev_get_drvdata(dev); |
| 854 | unsigned long flags; |
| 855 | |
| 856 | spin_lock_irqsave(&dwc->lock, flags); |
| 857 | |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 858 | switch (dwc->dr_mode) { |
| 859 | case USB_DR_MODE_PERIPHERAL: |
| 860 | case USB_DR_MODE_OTG: |
Felipe Balbi | 7415f17 | 2012-04-30 14:56:33 +0300 | [diff] [blame] | 861 | dwc3_gadget_suspend(dwc); |
| 862 | /* FALLTHROUGH */ |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 863 | case USB_DR_MODE_HOST: |
Felipe Balbi | 7415f17 | 2012-04-30 14:56:33 +0300 | [diff] [blame] | 864 | default: |
| 865 | /* do nothing */ |
| 866 | break; |
| 867 | } |
| 868 | |
| 869 | dwc->gctl = dwc3_readl(dwc->regs, DWC3_GCTL); |
| 870 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 871 | |
| 872 | usb_phy_shutdown(dwc->usb3_phy); |
| 873 | usb_phy_shutdown(dwc->usb2_phy); |
Kishon Vijay Abraham I | 5730348 | 2014-03-03 17:08:11 +0530 | [diff] [blame] | 874 | phy_exit(dwc->usb2_generic_phy); |
| 875 | phy_exit(dwc->usb3_generic_phy); |
Felipe Balbi | 7415f17 | 2012-04-30 14:56:33 +0300 | [diff] [blame] | 876 | |
| 877 | return 0; |
| 878 | } |
| 879 | |
| 880 | static int dwc3_resume(struct device *dev) |
| 881 | { |
| 882 | struct dwc3 *dwc = dev_get_drvdata(dev); |
| 883 | unsigned long flags; |
Kishon Vijay Abraham I | 5730348 | 2014-03-03 17:08:11 +0530 | [diff] [blame] | 884 | int ret; |
Felipe Balbi | 7415f17 | 2012-04-30 14:56:33 +0300 | [diff] [blame] | 885 | |
| 886 | usb_phy_init(dwc->usb3_phy); |
| 887 | usb_phy_init(dwc->usb2_phy); |
Kishon Vijay Abraham I | 5730348 | 2014-03-03 17:08:11 +0530 | [diff] [blame] | 888 | ret = phy_init(dwc->usb2_generic_phy); |
| 889 | if (ret < 0) |
| 890 | return ret; |
| 891 | |
| 892 | ret = phy_init(dwc->usb3_generic_phy); |
| 893 | if (ret < 0) |
| 894 | goto err_usb2phy_init; |
Felipe Balbi | 7415f17 | 2012-04-30 14:56:33 +0300 | [diff] [blame] | 895 | |
| 896 | spin_lock_irqsave(&dwc->lock, flags); |
| 897 | |
| 898 | dwc3_writel(dwc->regs, DWC3_GCTL, dwc->gctl); |
| 899 | |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 900 | switch (dwc->dr_mode) { |
| 901 | case USB_DR_MODE_PERIPHERAL: |
| 902 | case USB_DR_MODE_OTG: |
Felipe Balbi | 7415f17 | 2012-04-30 14:56:33 +0300 | [diff] [blame] | 903 | dwc3_gadget_resume(dwc); |
| 904 | /* FALLTHROUGH */ |
Ruchika Kharwar | a45c82b8 | 2013-07-06 07:52:49 -0500 | [diff] [blame] | 905 | case USB_DR_MODE_HOST: |
Felipe Balbi | 7415f17 | 2012-04-30 14:56:33 +0300 | [diff] [blame] | 906 | default: |
| 907 | /* do nothing */ |
| 908 | break; |
| 909 | } |
| 910 | |
| 911 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 912 | |
| 913 | pm_runtime_disable(dev); |
| 914 | pm_runtime_set_active(dev); |
| 915 | pm_runtime_enable(dev); |
| 916 | |
| 917 | return 0; |
Kishon Vijay Abraham I | 5730348 | 2014-03-03 17:08:11 +0530 | [diff] [blame] | 918 | |
| 919 | err_usb2phy_init: |
| 920 | phy_exit(dwc->usb2_generic_phy); |
| 921 | |
| 922 | return ret; |
Felipe Balbi | 7415f17 | 2012-04-30 14:56:33 +0300 | [diff] [blame] | 923 | } |
| 924 | |
| 925 | static const struct dev_pm_ops dwc3_dev_pm_ops = { |
| 926 | .prepare = dwc3_prepare, |
| 927 | .complete = dwc3_complete, |
| 928 | |
| 929 | SET_SYSTEM_SLEEP_PM_OPS(dwc3_suspend, dwc3_resume) |
| 930 | }; |
| 931 | |
| 932 | #define DWC3_PM_OPS &(dwc3_dev_pm_ops) |
| 933 | #else |
| 934 | #define DWC3_PM_OPS NULL |
| 935 | #endif |
| 936 | |
Kishon Vijay Abraham I | 5088b6f | 2013-01-25 16:36:53 +0530 | [diff] [blame] | 937 | #ifdef CONFIG_OF |
| 938 | static const struct of_device_id of_dwc3_match[] = { |
| 939 | { |
Felipe Balbi | 22a5aa1 | 2013-07-02 21:20:24 +0300 | [diff] [blame] | 940 | .compatible = "snps,dwc3" |
| 941 | }, |
| 942 | { |
Kishon Vijay Abraham I | 5088b6f | 2013-01-25 16:36:53 +0530 | [diff] [blame] | 943 | .compatible = "synopsys,dwc3" |
| 944 | }, |
| 945 | { }, |
| 946 | }; |
| 947 | MODULE_DEVICE_TABLE(of, of_dwc3_match); |
| 948 | #endif |
| 949 | |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 950 | static struct platform_driver dwc3_driver = { |
| 951 | .probe = dwc3_probe, |
Bill Pemberton | 7690417 | 2012-11-19 13:21:08 -0500 | [diff] [blame] | 952 | .remove = dwc3_remove, |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 953 | .driver = { |
| 954 | .name = "dwc3", |
Kishon Vijay Abraham I | 5088b6f | 2013-01-25 16:36:53 +0530 | [diff] [blame] | 955 | .of_match_table = of_match_ptr(of_dwc3_match), |
Felipe Balbi | 7415f17 | 2012-04-30 14:56:33 +0300 | [diff] [blame] | 956 | .pm = DWC3_PM_OPS, |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 957 | }, |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 958 | }; |
| 959 | |
Tobias Klauser | b1116dc | 2012-02-28 12:57:20 +0100 | [diff] [blame] | 960 | module_platform_driver(dwc3_driver); |
| 961 | |
Sebastian Andrzej Siewior | 7ae4fc4 | 2011-10-19 19:39:50 +0200 | [diff] [blame] | 962 | MODULE_ALIAS("platform:dwc3"); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 963 | MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); |
Felipe Balbi | 5945f78 | 2013-06-30 14:15:11 +0300 | [diff] [blame] | 964 | MODULE_LICENSE("GPL v2"); |
Felipe Balbi | 72246da | 2011-08-19 18:10:58 +0300 | [diff] [blame] | 965 | MODULE_DESCRIPTION("DesignWare USB3 DRD Controller Driver"); |