| 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /** |
| 3 | * debugfs.c - DesignWare USB3 DRD Controller DebugFS file |
| 4 | * |
| 5 | * Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com |
| 6 | * |
| 7 | * Authors: Felipe Balbi <balbi@ti.com>, |
| 8 | * Sebastian Andrzej Siewior <bigeasy@linutronix.de> |
| 9 | */ |
| 10 | |
| 11 | #include <linux/kernel.h> |
| 12 | #include <linux/slab.h> |
| 13 | #include <linux/ptrace.h> |
| 14 | #include <linux/types.h> |
| 15 | #include <linux/spinlock.h> |
| 16 | #include <linux/debugfs.h> |
| 17 | #include <linux/seq_file.h> |
| 18 | #include <linux/delay.h> |
| 19 | #include <linux/uaccess.h> |
| 20 | |
| 21 | #include <linux/usb/ch9.h> |
| 22 | |
| 23 | #include "core.h" |
| 24 | #include "gadget.h" |
| 25 | #include "io.h" |
| 26 | #include "debug.h" |
| 27 | |
| 28 | #define DWC3_LSP_MUX_UNSELECTED 0xfffff |
| 29 | |
| 30 | #define dump_register(nm) \ |
| 31 | { \ |
| 32 | .name = __stringify(nm), \ |
| 33 | .offset = DWC3_ ##nm, \ |
| 34 | } |
| 35 | |
| 36 | #define dump_ep_register_set(n) \ |
| 37 | { \ |
| 38 | .name = "DEPCMDPAR2("__stringify(n)")", \ |
| 39 | .offset = DWC3_DEP_BASE(n) + \ |
| 40 | DWC3_DEPCMDPAR2, \ |
| 41 | }, \ |
| 42 | { \ |
| 43 | .name = "DEPCMDPAR1("__stringify(n)")", \ |
| 44 | .offset = DWC3_DEP_BASE(n) + \ |
| 45 | DWC3_DEPCMDPAR1, \ |
| 46 | }, \ |
| 47 | { \ |
| 48 | .name = "DEPCMDPAR0("__stringify(n)")", \ |
| 49 | .offset = DWC3_DEP_BASE(n) + \ |
| 50 | DWC3_DEPCMDPAR0, \ |
| 51 | }, \ |
| 52 | { \ |
| 53 | .name = "DEPCMD("__stringify(n)")", \ |
| 54 | .offset = DWC3_DEP_BASE(n) + \ |
| 55 | DWC3_DEPCMD, \ |
| 56 | } |
| 57 | |
| 58 | |
| 59 | static const struct debugfs_reg32 dwc3_regs[] = { |
| 60 | dump_register(GSBUSCFG0), |
| 61 | dump_register(GSBUSCFG1), |
| 62 | dump_register(GTXTHRCFG), |
| 63 | dump_register(GRXTHRCFG), |
| 64 | dump_register(GCTL), |
| 65 | dump_register(GEVTEN), |
| 66 | dump_register(GSTS), |
| 67 | dump_register(GUCTL1), |
| 68 | dump_register(GSNPSID), |
| 69 | dump_register(GGPIO), |
| 70 | dump_register(GUID), |
| 71 | dump_register(GUCTL), |
| 72 | dump_register(GBUSERRADDR0), |
| 73 | dump_register(GBUSERRADDR1), |
| 74 | dump_register(GPRTBIMAP0), |
| 75 | dump_register(GPRTBIMAP1), |
| 76 | dump_register(GHWPARAMS0), |
| 77 | dump_register(GHWPARAMS1), |
| 78 | dump_register(GHWPARAMS2), |
| 79 | dump_register(GHWPARAMS3), |
| 80 | dump_register(GHWPARAMS4), |
| 81 | dump_register(GHWPARAMS5), |
| 82 | dump_register(GHWPARAMS6), |
| 83 | dump_register(GHWPARAMS7), |
| 84 | dump_register(GDBGFIFOSPACE), |
| 85 | dump_register(GDBGLTSSM), |
| 86 | dump_register(GDBGBMU), |
| 87 | dump_register(GPRTBIMAP_HS0), |
| 88 | dump_register(GPRTBIMAP_HS1), |
| 89 | dump_register(GPRTBIMAP_FS0), |
| 90 | dump_register(GPRTBIMAP_FS1), |
| 91 | |
| 92 | dump_register(GUSB2PHYCFG(0)), |
| 93 | dump_register(GUSB2PHYCFG(1)), |
| 94 | dump_register(GUSB2PHYCFG(2)), |
| 95 | dump_register(GUSB2PHYCFG(3)), |
| 96 | dump_register(GUSB2PHYCFG(4)), |
| 97 | dump_register(GUSB2PHYCFG(5)), |
| 98 | dump_register(GUSB2PHYCFG(6)), |
| 99 | dump_register(GUSB2PHYCFG(7)), |
| 100 | dump_register(GUSB2PHYCFG(8)), |
| 101 | dump_register(GUSB2PHYCFG(9)), |
| 102 | dump_register(GUSB2PHYCFG(10)), |
| 103 | dump_register(GUSB2PHYCFG(11)), |
| 104 | dump_register(GUSB2PHYCFG(12)), |
| 105 | dump_register(GUSB2PHYCFG(13)), |
| 106 | dump_register(GUSB2PHYCFG(14)), |
| 107 | dump_register(GUSB2PHYCFG(15)), |
| 108 | |
| 109 | dump_register(GUSB2I2CCTL(0)), |
| 110 | dump_register(GUSB2I2CCTL(1)), |
| 111 | dump_register(GUSB2I2CCTL(2)), |
| 112 | dump_register(GUSB2I2CCTL(3)), |
| 113 | dump_register(GUSB2I2CCTL(4)), |
| 114 | dump_register(GUSB2I2CCTL(5)), |
| 115 | dump_register(GUSB2I2CCTL(6)), |
| 116 | dump_register(GUSB2I2CCTL(7)), |
| 117 | dump_register(GUSB2I2CCTL(8)), |
| 118 | dump_register(GUSB2I2CCTL(9)), |
| 119 | dump_register(GUSB2I2CCTL(10)), |
| 120 | dump_register(GUSB2I2CCTL(11)), |
| 121 | dump_register(GUSB2I2CCTL(12)), |
| 122 | dump_register(GUSB2I2CCTL(13)), |
| 123 | dump_register(GUSB2I2CCTL(14)), |
| 124 | dump_register(GUSB2I2CCTL(15)), |
| 125 | |
| 126 | dump_register(GUSB2PHYACC(0)), |
| 127 | dump_register(GUSB2PHYACC(1)), |
| 128 | dump_register(GUSB2PHYACC(2)), |
| 129 | dump_register(GUSB2PHYACC(3)), |
| 130 | dump_register(GUSB2PHYACC(4)), |
| 131 | dump_register(GUSB2PHYACC(5)), |
| 132 | dump_register(GUSB2PHYACC(6)), |
| 133 | dump_register(GUSB2PHYACC(7)), |
| 134 | dump_register(GUSB2PHYACC(8)), |
| 135 | dump_register(GUSB2PHYACC(9)), |
| 136 | dump_register(GUSB2PHYACC(10)), |
| 137 | dump_register(GUSB2PHYACC(11)), |
| 138 | dump_register(GUSB2PHYACC(12)), |
| 139 | dump_register(GUSB2PHYACC(13)), |
| 140 | dump_register(GUSB2PHYACC(14)), |
| 141 | dump_register(GUSB2PHYACC(15)), |
| 142 | |
| 143 | dump_register(GUSB3PIPECTL(0)), |
| 144 | dump_register(GUSB3PIPECTL(1)), |
| 145 | dump_register(GUSB3PIPECTL(2)), |
| 146 | dump_register(GUSB3PIPECTL(3)), |
| 147 | dump_register(GUSB3PIPECTL(4)), |
| 148 | dump_register(GUSB3PIPECTL(5)), |
| 149 | dump_register(GUSB3PIPECTL(6)), |
| 150 | dump_register(GUSB3PIPECTL(7)), |
| 151 | dump_register(GUSB3PIPECTL(8)), |
| 152 | dump_register(GUSB3PIPECTL(9)), |
| 153 | dump_register(GUSB3PIPECTL(10)), |
| 154 | dump_register(GUSB3PIPECTL(11)), |
| 155 | dump_register(GUSB3PIPECTL(12)), |
| 156 | dump_register(GUSB3PIPECTL(13)), |
| 157 | dump_register(GUSB3PIPECTL(14)), |
| 158 | dump_register(GUSB3PIPECTL(15)), |
| 159 | |
| 160 | dump_register(GTXFIFOSIZ(0)), |
| 161 | dump_register(GTXFIFOSIZ(1)), |
| 162 | dump_register(GTXFIFOSIZ(2)), |
| 163 | dump_register(GTXFIFOSIZ(3)), |
| 164 | dump_register(GTXFIFOSIZ(4)), |
| 165 | dump_register(GTXFIFOSIZ(5)), |
| 166 | dump_register(GTXFIFOSIZ(6)), |
| 167 | dump_register(GTXFIFOSIZ(7)), |
| 168 | dump_register(GTXFIFOSIZ(8)), |
| 169 | dump_register(GTXFIFOSIZ(9)), |
| 170 | dump_register(GTXFIFOSIZ(10)), |
| 171 | dump_register(GTXFIFOSIZ(11)), |
| 172 | dump_register(GTXFIFOSIZ(12)), |
| 173 | dump_register(GTXFIFOSIZ(13)), |
| 174 | dump_register(GTXFIFOSIZ(14)), |
| 175 | dump_register(GTXFIFOSIZ(15)), |
| 176 | dump_register(GTXFIFOSIZ(16)), |
| 177 | dump_register(GTXFIFOSIZ(17)), |
| 178 | dump_register(GTXFIFOSIZ(18)), |
| 179 | dump_register(GTXFIFOSIZ(19)), |
| 180 | dump_register(GTXFIFOSIZ(20)), |
| 181 | dump_register(GTXFIFOSIZ(21)), |
| 182 | dump_register(GTXFIFOSIZ(22)), |
| 183 | dump_register(GTXFIFOSIZ(23)), |
| 184 | dump_register(GTXFIFOSIZ(24)), |
| 185 | dump_register(GTXFIFOSIZ(25)), |
| 186 | dump_register(GTXFIFOSIZ(26)), |
| 187 | dump_register(GTXFIFOSIZ(27)), |
| 188 | dump_register(GTXFIFOSIZ(28)), |
| 189 | dump_register(GTXFIFOSIZ(29)), |
| 190 | dump_register(GTXFIFOSIZ(30)), |
| 191 | dump_register(GTXFIFOSIZ(31)), |
| 192 | |
| 193 | dump_register(GRXFIFOSIZ(0)), |
| 194 | dump_register(GRXFIFOSIZ(1)), |
| 195 | dump_register(GRXFIFOSIZ(2)), |
| 196 | dump_register(GRXFIFOSIZ(3)), |
| 197 | dump_register(GRXFIFOSIZ(4)), |
| 198 | dump_register(GRXFIFOSIZ(5)), |
| 199 | dump_register(GRXFIFOSIZ(6)), |
| 200 | dump_register(GRXFIFOSIZ(7)), |
| 201 | dump_register(GRXFIFOSIZ(8)), |
| 202 | dump_register(GRXFIFOSIZ(9)), |
| 203 | dump_register(GRXFIFOSIZ(10)), |
| 204 | dump_register(GRXFIFOSIZ(11)), |
| 205 | dump_register(GRXFIFOSIZ(12)), |
| 206 | dump_register(GRXFIFOSIZ(13)), |
| 207 | dump_register(GRXFIFOSIZ(14)), |
| 208 | dump_register(GRXFIFOSIZ(15)), |
| 209 | dump_register(GRXFIFOSIZ(16)), |
| 210 | dump_register(GRXFIFOSIZ(17)), |
| 211 | dump_register(GRXFIFOSIZ(18)), |
| 212 | dump_register(GRXFIFOSIZ(19)), |
| 213 | dump_register(GRXFIFOSIZ(20)), |
| 214 | dump_register(GRXFIFOSIZ(21)), |
| 215 | dump_register(GRXFIFOSIZ(22)), |
| 216 | dump_register(GRXFIFOSIZ(23)), |
| 217 | dump_register(GRXFIFOSIZ(24)), |
| 218 | dump_register(GRXFIFOSIZ(25)), |
| 219 | dump_register(GRXFIFOSIZ(26)), |
| 220 | dump_register(GRXFIFOSIZ(27)), |
| 221 | dump_register(GRXFIFOSIZ(28)), |
| 222 | dump_register(GRXFIFOSIZ(29)), |
| 223 | dump_register(GRXFIFOSIZ(30)), |
| 224 | dump_register(GRXFIFOSIZ(31)), |
| 225 | |
| 226 | dump_register(GEVNTADRLO(0)), |
| 227 | dump_register(GEVNTADRHI(0)), |
| 228 | dump_register(GEVNTSIZ(0)), |
| 229 | dump_register(GEVNTCOUNT(0)), |
| 230 | |
| 231 | dump_register(GHWPARAMS8), |
| 232 | dump_register(DCFG), |
| 233 | dump_register(DCTL), |
| 234 | dump_register(DEVTEN), |
| 235 | dump_register(DSTS), |
| 236 | dump_register(DGCMDPAR), |
| 237 | dump_register(DGCMD), |
| 238 | dump_register(DALEPENA), |
| 239 | |
| 240 | dump_ep_register_set(0), |
| 241 | dump_ep_register_set(1), |
| 242 | dump_ep_register_set(2), |
| 243 | dump_ep_register_set(3), |
| 244 | dump_ep_register_set(4), |
| 245 | dump_ep_register_set(5), |
| 246 | dump_ep_register_set(6), |
| 247 | dump_ep_register_set(7), |
| 248 | dump_ep_register_set(8), |
| 249 | dump_ep_register_set(9), |
| 250 | dump_ep_register_set(10), |
| 251 | dump_ep_register_set(11), |
| 252 | dump_ep_register_set(12), |
| 253 | dump_ep_register_set(13), |
| 254 | dump_ep_register_set(14), |
| 255 | dump_ep_register_set(15), |
| 256 | dump_ep_register_set(16), |
| 257 | dump_ep_register_set(17), |
| 258 | dump_ep_register_set(18), |
| 259 | dump_ep_register_set(19), |
| 260 | dump_ep_register_set(20), |
| 261 | dump_ep_register_set(21), |
| 262 | dump_ep_register_set(22), |
| 263 | dump_ep_register_set(23), |
| 264 | dump_ep_register_set(24), |
| 265 | dump_ep_register_set(25), |
| 266 | dump_ep_register_set(26), |
| 267 | dump_ep_register_set(27), |
| 268 | dump_ep_register_set(28), |
| 269 | dump_ep_register_set(29), |
| 270 | dump_ep_register_set(30), |
| 271 | dump_ep_register_set(31), |
| 272 | |
| 273 | dump_register(OCFG), |
| 274 | dump_register(OCTL), |
| 275 | dump_register(OEVT), |
| 276 | dump_register(OEVTEN), |
| 277 | dump_register(OSTS), |
| 278 | }; |
| 279 | |
| 280 | static void dwc3_host_lsp(struct seq_file *s) |
| 281 | { |
| 282 | struct dwc3 *dwc = s->private; |
| 283 | bool dbc_enabled; |
| 284 | u32 sel; |
| 285 | u32 reg; |
| 286 | u32 val; |
| 287 | |
| 288 | dbc_enabled = !!(dwc->hwparams.hwparams1 & DWC3_GHWPARAMS1_ENDBC); |
| 289 | |
| 290 | sel = dwc->dbg_lsp_select; |
| 291 | if (sel == DWC3_LSP_MUX_UNSELECTED) { |
| 292 | seq_puts(s, "Write LSP selection to print for host\n"); |
| 293 | return; |
| 294 | } |
| 295 | |
| 296 | reg = DWC3_GDBGLSPMUX_HOSTSELECT(sel); |
| 297 | |
| 298 | dwc3_writel(dwc->regs, DWC3_GDBGLSPMUX, reg); |
| 299 | val = dwc3_readl(dwc->regs, DWC3_GDBGLSP); |
| 300 | seq_printf(s, "GDBGLSP[%d] = 0x%08x\n", sel, val); |
| 301 | |
| 302 | if (dbc_enabled && sel < 256) { |
| 303 | reg |= DWC3_GDBGLSPMUX_ENDBC; |
| 304 | dwc3_writel(dwc->regs, DWC3_GDBGLSPMUX, reg); |
| 305 | val = dwc3_readl(dwc->regs, DWC3_GDBGLSP); |
| 306 | seq_printf(s, "GDBGLSP_DBC[%d] = 0x%08x\n", sel, val); |
| 307 | } |
| 308 | } |
| 309 | |
| 310 | static void dwc3_gadget_lsp(struct seq_file *s) |
| 311 | { |
| 312 | struct dwc3 *dwc = s->private; |
| 313 | int i; |
| 314 | u32 reg; |
| 315 | |
| 316 | for (i = 0; i < 16; i++) { |
| 317 | reg = DWC3_GDBGLSPMUX_DEVSELECT(i); |
| 318 | dwc3_writel(dwc->regs, DWC3_GDBGLSPMUX, reg); |
| 319 | reg = dwc3_readl(dwc->regs, DWC3_GDBGLSP); |
| 320 | seq_printf(s, "GDBGLSP[%d] = 0x%08x\n", i, reg); |
| 321 | } |
| 322 | } |
| 323 | |
| 324 | static int dwc3_lsp_show(struct seq_file *s, void *unused) |
| 325 | { |
| 326 | struct dwc3 *dwc = s->private; |
| 327 | unsigned int current_mode; |
| 328 | unsigned long flags; |
| 329 | u32 reg; |
| 330 | |
| 331 | spin_lock_irqsave(&dwc->lock, flags); |
| 332 | reg = dwc3_readl(dwc->regs, DWC3_GSTS); |
| 333 | current_mode = DWC3_GSTS_CURMOD(reg); |
| 334 | |
| 335 | switch (current_mode) { |
| 336 | case DWC3_GSTS_CURMOD_HOST: |
| 337 | dwc3_host_lsp(s); |
| 338 | break; |
| 339 | case DWC3_GSTS_CURMOD_DEVICE: |
| 340 | dwc3_gadget_lsp(s); |
| 341 | break; |
| 342 | default: |
| 343 | seq_puts(s, "Mode is unknown, no LSP register printed\n"); |
| 344 | break; |
| 345 | } |
| 346 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 347 | |
| 348 | return 0; |
| 349 | } |
| 350 | |
| 351 | static int dwc3_lsp_open(struct inode *inode, struct file *file) |
| 352 | { |
| 353 | return single_open(file, dwc3_lsp_show, inode->i_private); |
| 354 | } |
| 355 | |
| 356 | static ssize_t dwc3_lsp_write(struct file *file, const char __user *ubuf, |
| 357 | size_t count, loff_t *ppos) |
| 358 | { |
| 359 | struct seq_file *s = file->private_data; |
| 360 | struct dwc3 *dwc = s->private; |
| 361 | unsigned long flags; |
| 362 | char buf[32] = { 0 }; |
| 363 | u32 sel; |
| 364 | int ret; |
| 365 | |
| 366 | if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) |
| 367 | return -EFAULT; |
| 368 | |
| 369 | ret = kstrtouint(buf, 0, &sel); |
| 370 | if (ret) |
| 371 | return ret; |
| 372 | |
| 373 | spin_lock_irqsave(&dwc->lock, flags); |
| 374 | dwc->dbg_lsp_select = sel; |
| 375 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 376 | |
| 377 | return count; |
| 378 | } |
| 379 | |
| 380 | static const struct file_operations dwc3_lsp_fops = { |
| 381 | .open = dwc3_lsp_open, |
| 382 | .write = dwc3_lsp_write, |
| 383 | .read = seq_read, |
| 384 | .llseek = seq_lseek, |
| 385 | .release = single_release, |
| 386 | }; |
| 387 | |
| 388 | static int dwc3_mode_show(struct seq_file *s, void *unused) |
| 389 | { |
| 390 | struct dwc3 *dwc = s->private; |
| 391 | unsigned long flags; |
| 392 | u32 reg; |
| 393 | |
| 394 | spin_lock_irqsave(&dwc->lock, flags); |
| 395 | reg = dwc3_readl(dwc->regs, DWC3_GCTL); |
| 396 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 397 | |
| 398 | switch (DWC3_GCTL_PRTCAP(reg)) { |
| 399 | case DWC3_GCTL_PRTCAP_HOST: |
| 400 | seq_puts(s, "host\n"); |
| 401 | break; |
| 402 | case DWC3_GCTL_PRTCAP_DEVICE: |
| 403 | seq_puts(s, "device\n"); |
| 404 | break; |
| 405 | case DWC3_GCTL_PRTCAP_OTG: |
| 406 | seq_puts(s, "otg\n"); |
| 407 | break; |
| 408 | default: |
| 409 | seq_printf(s, "UNKNOWN %08x\n", DWC3_GCTL_PRTCAP(reg)); |
| 410 | } |
| 411 | |
| 412 | return 0; |
| 413 | } |
| 414 | |
| 415 | static int dwc3_mode_open(struct inode *inode, struct file *file) |
| 416 | { |
| 417 | return single_open(file, dwc3_mode_show, inode->i_private); |
| 418 | } |
| 419 | |
| 420 | static ssize_t dwc3_mode_write(struct file *file, |
| 421 | const char __user *ubuf, size_t count, loff_t *ppos) |
| 422 | { |
| 423 | struct seq_file *s = file->private_data; |
| 424 | struct dwc3 *dwc = s->private; |
| 425 | u32 mode = 0; |
| 426 | char buf[32]; |
| 427 | |
| 428 | if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) |
| 429 | return -EFAULT; |
| 430 | |
| 431 | if (dwc->dr_mode != USB_DR_MODE_OTG) |
| 432 | return count; |
| 433 | |
| 434 | if (!strncmp(buf, "host", 4)) |
| 435 | mode = DWC3_GCTL_PRTCAP_HOST; |
| 436 | |
| 437 | if (!strncmp(buf, "device", 6)) |
| 438 | mode = DWC3_GCTL_PRTCAP_DEVICE; |
| 439 | |
| 440 | if (!strncmp(buf, "otg", 3)) |
| 441 | mode = DWC3_GCTL_PRTCAP_OTG; |
| 442 | |
| 443 | dwc3_set_mode(dwc, mode); |
| 444 | |
| 445 | return count; |
| 446 | } |
| 447 | |
| 448 | static const struct file_operations dwc3_mode_fops = { |
| 449 | .open = dwc3_mode_open, |
| 450 | .write = dwc3_mode_write, |
| 451 | .read = seq_read, |
| 452 | .llseek = seq_lseek, |
| 453 | .release = single_release, |
| 454 | }; |
| 455 | |
| 456 | static int dwc3_testmode_show(struct seq_file *s, void *unused) |
| 457 | { |
| 458 | struct dwc3 *dwc = s->private; |
| 459 | unsigned long flags; |
| 460 | u32 reg; |
| 461 | |
| 462 | spin_lock_irqsave(&dwc->lock, flags); |
| 463 | reg = dwc3_readl(dwc->regs, DWC3_DCTL); |
| 464 | reg &= DWC3_DCTL_TSTCTRL_MASK; |
| 465 | reg >>= 1; |
| 466 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 467 | |
| 468 | switch (reg) { |
| 469 | case 0: |
| 470 | seq_puts(s, "no test\n"); |
| 471 | break; |
| 472 | case USB_TEST_J: |
| 473 | seq_puts(s, "test_j\n"); |
| 474 | break; |
| 475 | case USB_TEST_K: |
| 476 | seq_puts(s, "test_k\n"); |
| 477 | break; |
| 478 | case USB_TEST_SE0_NAK: |
| 479 | seq_puts(s, "test_se0_nak\n"); |
| 480 | break; |
| 481 | case USB_TEST_PACKET: |
| 482 | seq_puts(s, "test_packet\n"); |
| 483 | break; |
| 484 | case USB_TEST_FORCE_ENABLE: |
| 485 | seq_puts(s, "test_force_enable\n"); |
| 486 | break; |
| 487 | default: |
| 488 | seq_printf(s, "UNKNOWN %d\n", reg); |
| 489 | } |
| 490 | |
| 491 | return 0; |
| 492 | } |
| 493 | |
| 494 | static int dwc3_testmode_open(struct inode *inode, struct file *file) |
| 495 | { |
| 496 | return single_open(file, dwc3_testmode_show, inode->i_private); |
| 497 | } |
| 498 | |
| 499 | static ssize_t dwc3_testmode_write(struct file *file, |
| 500 | const char __user *ubuf, size_t count, loff_t *ppos) |
| 501 | { |
| 502 | struct seq_file *s = file->private_data; |
| 503 | struct dwc3 *dwc = s->private; |
| 504 | unsigned long flags; |
| 505 | u32 testmode = 0; |
| 506 | char buf[32]; |
| 507 | |
| 508 | if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) |
| 509 | return -EFAULT; |
| 510 | |
| 511 | if (!strncmp(buf, "test_j", 6)) |
| 512 | testmode = USB_TEST_J; |
| 513 | else if (!strncmp(buf, "test_k", 6)) |
| 514 | testmode = USB_TEST_K; |
| 515 | else if (!strncmp(buf, "test_se0_nak", 12)) |
| 516 | testmode = USB_TEST_SE0_NAK; |
| 517 | else if (!strncmp(buf, "test_packet", 11)) |
| 518 | testmode = USB_TEST_PACKET; |
| 519 | else if (!strncmp(buf, "test_force_enable", 17)) |
| 520 | testmode = USB_TEST_FORCE_ENABLE; |
| 521 | else |
| 522 | testmode = 0; |
| 523 | |
| 524 | spin_lock_irqsave(&dwc->lock, flags); |
| 525 | dwc3_gadget_set_test_mode(dwc, testmode); |
| 526 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 527 | |
| 528 | return count; |
| 529 | } |
| 530 | |
| 531 | static const struct file_operations dwc3_testmode_fops = { |
| 532 | .open = dwc3_testmode_open, |
| 533 | .write = dwc3_testmode_write, |
| 534 | .read = seq_read, |
| 535 | .llseek = seq_lseek, |
| 536 | .release = single_release, |
| 537 | }; |
| 538 | |
| 539 | static int dwc3_link_state_show(struct seq_file *s, void *unused) |
| 540 | { |
| 541 | struct dwc3 *dwc = s->private; |
| 542 | unsigned long flags; |
| 543 | enum dwc3_link_state state; |
| 544 | u32 reg; |
| 545 | u8 speed; |
| 546 | |
| 547 | spin_lock_irqsave(&dwc->lock, flags); |
| 548 | reg = dwc3_readl(dwc->regs, DWC3_GSTS); |
| 549 | if (DWC3_GSTS_CURMOD(reg) != DWC3_GSTS_CURMOD_DEVICE) { |
| 550 | seq_puts(s, "Not available\n"); |
| 551 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 552 | return 0; |
| 553 | } |
| 554 | |
| 555 | reg = dwc3_readl(dwc->regs, DWC3_DSTS); |
| 556 | state = DWC3_DSTS_USBLNKST(reg); |
| 557 | speed = reg & DWC3_DSTS_CONNECTSPD; |
| 558 | |
| 559 | seq_printf(s, "%s\n", (speed >= DWC3_DSTS_SUPERSPEED) ? |
| 560 | dwc3_gadget_link_string(state) : |
| 561 | dwc3_gadget_hs_link_string(state)); |
| 562 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 563 | |
| 564 | return 0; |
| 565 | } |
| 566 | |
| 567 | static int dwc3_link_state_open(struct inode *inode, struct file *file) |
| 568 | { |
| 569 | return single_open(file, dwc3_link_state_show, inode->i_private); |
| 570 | } |
| 571 | |
| 572 | static ssize_t dwc3_link_state_write(struct file *file, |
| 573 | const char __user *ubuf, size_t count, loff_t *ppos) |
| 574 | { |
| 575 | struct seq_file *s = file->private_data; |
| 576 | struct dwc3 *dwc = s->private; |
| 577 | unsigned long flags; |
| 578 | enum dwc3_link_state state = 0; |
| 579 | char buf[32]; |
| 580 | u32 reg; |
| 581 | u8 speed; |
| 582 | |
| 583 | if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) |
| 584 | return -EFAULT; |
| 585 | |
| 586 | if (!strncmp(buf, "SS.Disabled", 11)) |
| 587 | state = DWC3_LINK_STATE_SS_DIS; |
| 588 | else if (!strncmp(buf, "Rx.Detect", 9)) |
| 589 | state = DWC3_LINK_STATE_RX_DET; |
| 590 | else if (!strncmp(buf, "SS.Inactive", 11)) |
| 591 | state = DWC3_LINK_STATE_SS_INACT; |
| 592 | else if (!strncmp(buf, "Recovery", 8)) |
| 593 | state = DWC3_LINK_STATE_RECOV; |
| 594 | else if (!strncmp(buf, "Compliance", 10)) |
| 595 | state = DWC3_LINK_STATE_CMPLY; |
| 596 | else if (!strncmp(buf, "Loopback", 8)) |
| 597 | state = DWC3_LINK_STATE_LPBK; |
| 598 | else |
| 599 | return -EINVAL; |
| 600 | |
| 601 | spin_lock_irqsave(&dwc->lock, flags); |
| 602 | reg = dwc3_readl(dwc->regs, DWC3_GSTS); |
| 603 | if (DWC3_GSTS_CURMOD(reg) != DWC3_GSTS_CURMOD_DEVICE) { |
| 604 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 605 | return -EINVAL; |
| 606 | } |
| 607 | |
| 608 | reg = dwc3_readl(dwc->regs, DWC3_DSTS); |
| 609 | speed = reg & DWC3_DSTS_CONNECTSPD; |
| 610 | |
| 611 | if (speed < DWC3_DSTS_SUPERSPEED && |
| 612 | state != DWC3_LINK_STATE_RECOV) { |
| 613 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 614 | return -EINVAL; |
| 615 | } |
| 616 | |
| 617 | dwc3_gadget_set_link_state(dwc, state); |
| 618 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 619 | |
| 620 | return count; |
| 621 | } |
| 622 | |
| 623 | static const struct file_operations dwc3_link_state_fops = { |
| 624 | .open = dwc3_link_state_open, |
| 625 | .write = dwc3_link_state_write, |
| 626 | .read = seq_read, |
| 627 | .llseek = seq_lseek, |
| 628 | .release = single_release, |
| 629 | }; |
| 630 | |
| 631 | struct dwc3_ep_file_map { |
| 632 | const char name[25]; |
| 633 | const struct file_operations *const fops; |
| 634 | }; |
| 635 | |
| 636 | static int dwc3_tx_fifo_size_show(struct seq_file *s, void *unused) |
| 637 | { |
| 638 | struct dwc3_ep *dep = s->private; |
| 639 | struct dwc3 *dwc = dep->dwc; |
| 640 | unsigned long flags; |
| 641 | int mdwidth; |
| 642 | u32 val; |
| 643 | |
| 644 | spin_lock_irqsave(&dwc->lock, flags); |
| 645 | val = dwc3_core_fifo_space(dep, DWC3_TXFIFO); |
| 646 | |
| 647 | /* Convert to bytes */ |
| 648 | mdwidth = DWC3_MDWIDTH(dwc->hwparams.hwparams0); |
| 649 | if (DWC3_IP_IS(DWC32)) |
| 650 | mdwidth += DWC3_GHWPARAMS6_MDWIDTH(dwc->hwparams.hwparams6); |
| 651 | |
| 652 | val *= mdwidth; |
| 653 | val >>= 3; |
| 654 | seq_printf(s, "%u\n", val); |
| 655 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 656 | |
| 657 | return 0; |
| 658 | } |
| 659 | |
| 660 | static int dwc3_rx_fifo_size_show(struct seq_file *s, void *unused) |
| 661 | { |
| 662 | struct dwc3_ep *dep = s->private; |
| 663 | struct dwc3 *dwc = dep->dwc; |
| 664 | unsigned long flags; |
| 665 | int mdwidth; |
| 666 | u32 val; |
| 667 | |
| 668 | spin_lock_irqsave(&dwc->lock, flags); |
| 669 | val = dwc3_core_fifo_space(dep, DWC3_RXFIFO); |
| 670 | |
| 671 | /* Convert to bytes */ |
| 672 | mdwidth = DWC3_MDWIDTH(dwc->hwparams.hwparams0); |
| 673 | if (DWC3_IP_IS(DWC32)) |
| 674 | mdwidth += DWC3_GHWPARAMS6_MDWIDTH(dwc->hwparams.hwparams6); |
| 675 | |
| 676 | val *= mdwidth; |
| 677 | val >>= 3; |
| 678 | seq_printf(s, "%u\n", val); |
| 679 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 680 | |
| 681 | return 0; |
| 682 | } |
| 683 | |
| 684 | static int dwc3_tx_request_queue_show(struct seq_file *s, void *unused) |
| 685 | { |
| 686 | struct dwc3_ep *dep = s->private; |
| 687 | struct dwc3 *dwc = dep->dwc; |
| 688 | unsigned long flags; |
| 689 | u32 val; |
| 690 | |
| 691 | spin_lock_irqsave(&dwc->lock, flags); |
| 692 | val = dwc3_core_fifo_space(dep, DWC3_TXREQQ); |
| 693 | seq_printf(s, "%u\n", val); |
| 694 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 695 | |
| 696 | return 0; |
| 697 | } |
| 698 | |
| 699 | static int dwc3_rx_request_queue_show(struct seq_file *s, void *unused) |
| 700 | { |
| 701 | struct dwc3_ep *dep = s->private; |
| 702 | struct dwc3 *dwc = dep->dwc; |
| 703 | unsigned long flags; |
| 704 | u32 val; |
| 705 | |
| 706 | spin_lock_irqsave(&dwc->lock, flags); |
| 707 | val = dwc3_core_fifo_space(dep, DWC3_RXREQQ); |
| 708 | seq_printf(s, "%u\n", val); |
| 709 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 710 | |
| 711 | return 0; |
| 712 | } |
| 713 | |
| 714 | static int dwc3_rx_info_queue_show(struct seq_file *s, void *unused) |
| 715 | { |
| 716 | struct dwc3_ep *dep = s->private; |
| 717 | struct dwc3 *dwc = dep->dwc; |
| 718 | unsigned long flags; |
| 719 | u32 val; |
| 720 | |
| 721 | spin_lock_irqsave(&dwc->lock, flags); |
| 722 | val = dwc3_core_fifo_space(dep, DWC3_RXINFOQ); |
| 723 | seq_printf(s, "%u\n", val); |
| 724 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 725 | |
| 726 | return 0; |
| 727 | } |
| 728 | |
| 729 | static int dwc3_descriptor_fetch_queue_show(struct seq_file *s, void *unused) |
| 730 | { |
| 731 | struct dwc3_ep *dep = s->private; |
| 732 | struct dwc3 *dwc = dep->dwc; |
| 733 | unsigned long flags; |
| 734 | u32 val; |
| 735 | |
| 736 | spin_lock_irqsave(&dwc->lock, flags); |
| 737 | val = dwc3_core_fifo_space(dep, DWC3_DESCFETCHQ); |
| 738 | seq_printf(s, "%u\n", val); |
| 739 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 740 | |
| 741 | return 0; |
| 742 | } |
| 743 | |
| 744 | static int dwc3_event_queue_show(struct seq_file *s, void *unused) |
| 745 | { |
| 746 | struct dwc3_ep *dep = s->private; |
| 747 | struct dwc3 *dwc = dep->dwc; |
| 748 | unsigned long flags; |
| 749 | u32 val; |
| 750 | |
| 751 | spin_lock_irqsave(&dwc->lock, flags); |
| 752 | val = dwc3_core_fifo_space(dep, DWC3_EVENTQ); |
| 753 | seq_printf(s, "%u\n", val); |
| 754 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 755 | |
| 756 | return 0; |
| 757 | } |
| 758 | |
| 759 | static int dwc3_transfer_type_show(struct seq_file *s, void *unused) |
| 760 | { |
| 761 | struct dwc3_ep *dep = s->private; |
| 762 | struct dwc3 *dwc = dep->dwc; |
| 763 | unsigned long flags; |
| 764 | |
| 765 | spin_lock_irqsave(&dwc->lock, flags); |
| 766 | if (!(dep->flags & DWC3_EP_ENABLED) || !dep->endpoint.desc) { |
| 767 | seq_puts(s, "--\n"); |
| 768 | goto out; |
| 769 | } |
| 770 | |
| 771 | switch (usb_endpoint_type(dep->endpoint.desc)) { |
| 772 | case USB_ENDPOINT_XFER_CONTROL: |
| 773 | seq_puts(s, "control\n"); |
| 774 | break; |
| 775 | case USB_ENDPOINT_XFER_ISOC: |
| 776 | seq_puts(s, "isochronous\n"); |
| 777 | break; |
| 778 | case USB_ENDPOINT_XFER_BULK: |
| 779 | seq_puts(s, "bulk\n"); |
| 780 | break; |
| 781 | case USB_ENDPOINT_XFER_INT: |
| 782 | seq_puts(s, "interrupt\n"); |
| 783 | break; |
| 784 | default: |
| 785 | seq_puts(s, "--\n"); |
| 786 | } |
| 787 | |
| 788 | out: |
| 789 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 790 | |
| 791 | return 0; |
| 792 | } |
| 793 | |
| 794 | static int dwc3_trb_ring_show(struct seq_file *s, void *unused) |
| 795 | { |
| 796 | struct dwc3_ep *dep = s->private; |
| 797 | struct dwc3 *dwc = dep->dwc; |
| 798 | unsigned long flags; |
| 799 | int i; |
| 800 | |
| 801 | spin_lock_irqsave(&dwc->lock, flags); |
| 802 | if (dep->number <= 1) { |
| 803 | seq_puts(s, "--\n"); |
| 804 | goto out; |
| 805 | } |
| 806 | |
| 807 | seq_puts(s, "buffer_addr,size,type,ioc,isp_imi,csp,chn,lst,hwo\n"); |
| 808 | |
| 809 | for (i = 0; i < DWC3_TRB_NUM; i++) { |
| 810 | struct dwc3_trb *trb = &dep->trb_pool[i]; |
| 811 | unsigned int type = DWC3_TRBCTL_TYPE(trb->ctrl); |
| 812 | |
| 813 | seq_printf(s, "%08x%08x,%d,%s,%d,%d,%d,%d,%d,%d %c%c\n", |
| 814 | trb->bph, trb->bpl, trb->size, |
| 815 | dwc3_trb_type_string(type), |
| 816 | !!(trb->ctrl & DWC3_TRB_CTRL_IOC), |
| 817 | !!(trb->ctrl & DWC3_TRB_CTRL_ISP_IMI), |
| 818 | !!(trb->ctrl & DWC3_TRB_CTRL_CSP), |
| 819 | !!(trb->ctrl & DWC3_TRB_CTRL_CHN), |
| 820 | !!(trb->ctrl & DWC3_TRB_CTRL_LST), |
| 821 | !!(trb->ctrl & DWC3_TRB_CTRL_HWO), |
| 822 | dep->trb_enqueue == i ? 'E' : ' ', |
| 823 | dep->trb_dequeue == i ? 'D' : ' '); |
| 824 | } |
| 825 | |
| 826 | out: |
| 827 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 828 | |
| 829 | return 0; |
| 830 | } |
| 831 | |
| 832 | static int dwc3_ep_info_register_show(struct seq_file *s, void *unused) |
| 833 | { |
| 834 | struct dwc3_ep *dep = s->private; |
| 835 | struct dwc3 *dwc = dep->dwc; |
| 836 | unsigned long flags; |
| 837 | u64 ep_info; |
| 838 | u32 lower_32_bits; |
| 839 | u32 upper_32_bits; |
| 840 | u32 reg; |
| 841 | |
| 842 | spin_lock_irqsave(&dwc->lock, flags); |
| 843 | reg = DWC3_GDBGLSPMUX_EPSELECT(dep->number); |
| 844 | dwc3_writel(dwc->regs, DWC3_GDBGLSPMUX, reg); |
| 845 | |
| 846 | lower_32_bits = dwc3_readl(dwc->regs, DWC3_GDBGEPINFO0); |
| 847 | upper_32_bits = dwc3_readl(dwc->regs, DWC3_GDBGEPINFO1); |
| 848 | |
| 849 | ep_info = ((u64)upper_32_bits << 32) | lower_32_bits; |
| 850 | seq_printf(s, "0x%016llx\n", ep_info); |
| 851 | spin_unlock_irqrestore(&dwc->lock, flags); |
| 852 | |
| 853 | return 0; |
| 854 | } |
| 855 | |
| 856 | DEFINE_SHOW_ATTRIBUTE(dwc3_tx_fifo_size); |
| 857 | DEFINE_SHOW_ATTRIBUTE(dwc3_rx_fifo_size); |
| 858 | DEFINE_SHOW_ATTRIBUTE(dwc3_tx_request_queue); |
| 859 | DEFINE_SHOW_ATTRIBUTE(dwc3_rx_request_queue); |
| 860 | DEFINE_SHOW_ATTRIBUTE(dwc3_rx_info_queue); |
| 861 | DEFINE_SHOW_ATTRIBUTE(dwc3_descriptor_fetch_queue); |
| 862 | DEFINE_SHOW_ATTRIBUTE(dwc3_event_queue); |
| 863 | DEFINE_SHOW_ATTRIBUTE(dwc3_transfer_type); |
| 864 | DEFINE_SHOW_ATTRIBUTE(dwc3_trb_ring); |
| 865 | DEFINE_SHOW_ATTRIBUTE(dwc3_ep_info_register); |
| 866 | |
| 867 | static const struct dwc3_ep_file_map dwc3_ep_file_map[] = { |
| 868 | { "tx_fifo_size", &dwc3_tx_fifo_size_fops, }, |
| 869 | { "rx_fifo_size", &dwc3_rx_fifo_size_fops, }, |
| 870 | { "tx_request_queue", &dwc3_tx_request_queue_fops, }, |
| 871 | { "rx_request_queue", &dwc3_rx_request_queue_fops, }, |
| 872 | { "rx_info_queue", &dwc3_rx_info_queue_fops, }, |
| 873 | { "descriptor_fetch_queue", &dwc3_descriptor_fetch_queue_fops, }, |
| 874 | { "event_queue", &dwc3_event_queue_fops, }, |
| 875 | { "transfer_type", &dwc3_transfer_type_fops, }, |
| 876 | { "trb_ring", &dwc3_trb_ring_fops, }, |
| 877 | { "GDBGEPINFO", &dwc3_ep_info_register_fops, }, |
| 878 | }; |
| 879 | |
| 880 | static void dwc3_debugfs_create_endpoint_files(struct dwc3_ep *dep, |
| 881 | struct dentry *parent) |
| 882 | { |
| 883 | int i; |
| 884 | |
| 885 | for (i = 0; i < ARRAY_SIZE(dwc3_ep_file_map); i++) { |
| 886 | const struct file_operations *fops = dwc3_ep_file_map[i].fops; |
| 887 | const char *name = dwc3_ep_file_map[i].name; |
| 888 | |
| 889 | debugfs_create_file(name, 0444, parent, dep, fops); |
| 890 | } |
| 891 | } |
| 892 | |
| 893 | static void dwc3_debugfs_create_endpoint_dir(struct dwc3_ep *dep, |
| 894 | struct dentry *parent) |
| 895 | { |
| 896 | struct dentry *dir; |
| 897 | |
| 898 | dir = debugfs_create_dir(dep->name, parent); |
| 899 | dwc3_debugfs_create_endpoint_files(dep, dir); |
| 900 | } |
| 901 | |
| 902 | static void dwc3_debugfs_create_endpoint_dirs(struct dwc3 *dwc, |
| 903 | struct dentry *parent) |
| 904 | { |
| 905 | int i; |
| 906 | |
| 907 | for (i = 0; i < dwc->num_eps; i++) { |
| 908 | struct dwc3_ep *dep = dwc->eps[i]; |
| 909 | |
| 910 | if (!dep) |
| 911 | continue; |
| 912 | |
| 913 | dwc3_debugfs_create_endpoint_dir(dep, parent); |
| 914 | } |
| 915 | } |
| 916 | |
| 917 | void dwc3_debugfs_init(struct dwc3 *dwc) |
| 918 | { |
| 919 | struct dentry *root; |
| 920 | |
| 921 | dwc->regset = kzalloc(sizeof(*dwc->regset), GFP_KERNEL); |
| 922 | if (!dwc->regset) |
| 923 | return; |
| 924 | |
| 925 | dwc->dbg_lsp_select = DWC3_LSP_MUX_UNSELECTED; |
| 926 | |
| 927 | dwc->regset->regs = dwc3_regs; |
| 928 | dwc->regset->nregs = ARRAY_SIZE(dwc3_regs); |
| 929 | dwc->regset->base = dwc->regs - DWC3_GLOBALS_REGS_START; |
| 930 | |
| 931 | root = debugfs_create_dir(dev_name(dwc->dev), usb_debug_root); |
| 932 | dwc->root = root; |
| 933 | |
| 934 | debugfs_create_regset32("regdump", 0444, root, dwc->regset); |
| 935 | debugfs_create_file("lsp_dump", 0644, root, dwc, &dwc3_lsp_fops); |
| 936 | |
| 937 | if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE)) |
| 938 | debugfs_create_file("mode", 0644, root, dwc, |
| 939 | &dwc3_mode_fops); |
| 940 | |
| 941 | if (IS_ENABLED(CONFIG_USB_DWC3_DUAL_ROLE) || |
| 942 | IS_ENABLED(CONFIG_USB_DWC3_GADGET)) { |
| 943 | debugfs_create_file("testmode", 0644, root, dwc, |
| 944 | &dwc3_testmode_fops); |
| 945 | debugfs_create_file("link_state", 0644, root, dwc, |
| 946 | &dwc3_link_state_fops); |
| 947 | dwc3_debugfs_create_endpoint_dirs(dwc, root); |
| 948 | } |
| 949 | } |
| 950 | |
| 951 | void dwc3_debugfs_exit(struct dwc3 *dwc) |
| 952 | { |
| 953 | debugfs_remove_recursive(dwc->root); |
| 954 | kfree(dwc->regset); |
| 955 | } |