1 #include <linux/kernel.h> 2 #include <linux/device.h> 3 #include <linux/types.h> 4 #include <linux/spinlock.h> 5 #include <linux/debugfs.h> 6 #include <linux/seq_file.h> 7 #include <linux/uaccess.h> 8 #include <linux/usb/ch9.h> 9 #include <linux/usb/gadget.h> 10 #include <linux/usb/phy.h> 11 #include <linux/usb/otg.h> 12 #include <linux/usb/otg-fsm.h> 13 #include <linux/usb/chipidea.h> 14 15 #include "ci.h" 16 #include "udc.h" 17 #include "bits.h" 18 #include "debug.h" 19 #include "otg.h" 20 21 /** 22 * ci_device_show: prints information about device capabilities and status 23 */ 24 static int ci_device_show(struct seq_file *s, void *data) 25 { 26 struct ci_hdrc *ci = s->private; 27 struct usb_gadget *gadget = &ci->gadget; 28 29 seq_printf(s, "speed = %d\n", gadget->speed); 30 seq_printf(s, "max_speed = %d\n", gadget->max_speed); 31 seq_printf(s, "is_otg = %d\n", gadget->is_otg); 32 seq_printf(s, "is_a_peripheral = %d\n", gadget->is_a_peripheral); 33 seq_printf(s, "b_hnp_enable = %d\n", gadget->b_hnp_enable); 34 seq_printf(s, "a_hnp_support = %d\n", gadget->a_hnp_support); 35 seq_printf(s, "a_alt_hnp_support = %d\n", gadget->a_alt_hnp_support); 36 seq_printf(s, "name = %s\n", 37 (gadget->name ? gadget->name : "")); 38 39 if (!ci->driver) 40 return 0; 41 42 seq_printf(s, "gadget function = %s\n", 43 (ci->driver->function ? ci->driver->function : "")); 44 seq_printf(s, "gadget max speed = %d\n", ci->driver->max_speed); 45 46 return 0; 47 } 48 49 static int ci_device_open(struct inode *inode, struct file *file) 50 { 51 return single_open(file, ci_device_show, inode->i_private); 52 } 53 54 static const struct file_operations ci_device_fops = { 55 .open = ci_device_open, 56 .read = seq_read, 57 .llseek = seq_lseek, 58 .release = single_release, 59 }; 60 61 /** 62 * ci_port_test_show: reads port test mode 63 */ 64 static int ci_port_test_show(struct seq_file *s, void *data) 65 { 66 struct ci_hdrc *ci = s->private; 67 unsigned long flags; 68 unsigned mode; 69 70 pm_runtime_get_sync(ci->dev); 71 spin_lock_irqsave(&ci->lock, flags); 72 mode = hw_port_test_get(ci); 73 spin_unlock_irqrestore(&ci->lock, flags); 74 pm_runtime_put_sync(ci->dev); 75 76 seq_printf(s, "mode = %u\n", mode); 77 78 return 0; 79 } 80 81 /** 82 * ci_port_test_write: writes port test mode 83 */ 84 static ssize_t ci_port_test_write(struct file *file, const char __user *ubuf, 85 size_t count, loff_t *ppos) 86 { 87 struct seq_file *s = file->private_data; 88 struct ci_hdrc *ci = s->private; 89 unsigned long flags; 90 unsigned mode; 91 char buf[32]; 92 int ret; 93 94 count = min_t(size_t, sizeof(buf) - 1, count); 95 if (copy_from_user(buf, ubuf, count)) 96 return -EFAULT; 97 98 /* sscanf requires a zero terminated string */ 99 buf[count] = '\0'; 100 101 if (sscanf(buf, "%u", &mode) != 1) 102 return -EINVAL; 103 104 pm_runtime_get_sync(ci->dev); 105 spin_lock_irqsave(&ci->lock, flags); 106 ret = hw_port_test_set(ci, mode); 107 spin_unlock_irqrestore(&ci->lock, flags); 108 pm_runtime_put_sync(ci->dev); 109 110 return ret ? ret : count; 111 } 112 113 static int ci_port_test_open(struct inode *inode, struct file *file) 114 { 115 return single_open(file, ci_port_test_show, inode->i_private); 116 } 117 118 static const struct file_operations ci_port_test_fops = { 119 .open = ci_port_test_open, 120 .write = ci_port_test_write, 121 .read = seq_read, 122 .llseek = seq_lseek, 123 .release = single_release, 124 }; 125 126 /** 127 * ci_qheads_show: DMA contents of all queue heads 128 */ 129 static int ci_qheads_show(struct seq_file *s, void *data) 130 { 131 struct ci_hdrc *ci = s->private; 132 unsigned long flags; 133 unsigned i, j; 134 135 if (ci->role != CI_ROLE_GADGET) { 136 seq_printf(s, "not in gadget mode\n"); 137 return 0; 138 } 139 140 spin_lock_irqsave(&ci->lock, flags); 141 for (i = 0; i < ci->hw_ep_max/2; i++) { 142 struct ci_hw_ep *hweprx = &ci->ci_hw_ep[i]; 143 struct ci_hw_ep *hweptx = 144 &ci->ci_hw_ep[i + ci->hw_ep_max/2]; 145 seq_printf(s, "EP=%02i: RX=%08X TX=%08X\n", 146 i, (u32)hweprx->qh.dma, (u32)hweptx->qh.dma); 147 for (j = 0; j < (sizeof(struct ci_hw_qh)/sizeof(u32)); j++) 148 seq_printf(s, " %04X: %08X %08X\n", j, 149 *((u32 *)hweprx->qh.ptr + j), 150 *((u32 *)hweptx->qh.ptr + j)); 151 } 152 spin_unlock_irqrestore(&ci->lock, flags); 153 154 return 0; 155 } 156 157 static int ci_qheads_open(struct inode *inode, struct file *file) 158 { 159 return single_open(file, ci_qheads_show, inode->i_private); 160 } 161 162 static const struct file_operations ci_qheads_fops = { 163 .open = ci_qheads_open, 164 .read = seq_read, 165 .llseek = seq_lseek, 166 .release = single_release, 167 }; 168 169 /** 170 * ci_requests_show: DMA contents of all requests currently queued (all endpts) 171 */ 172 static int ci_requests_show(struct seq_file *s, void *data) 173 { 174 struct ci_hdrc *ci = s->private; 175 unsigned long flags; 176 struct list_head *ptr = NULL; 177 struct ci_hw_req *req = NULL; 178 struct td_node *node, *tmpnode; 179 unsigned i, j, qsize = sizeof(struct ci_hw_td)/sizeof(u32); 180 181 if (ci->role != CI_ROLE_GADGET) { 182 seq_printf(s, "not in gadget mode\n"); 183 return 0; 184 } 185 186 spin_lock_irqsave(&ci->lock, flags); 187 for (i = 0; i < ci->hw_ep_max; i++) 188 list_for_each(ptr, &ci->ci_hw_ep[i].qh.queue) { 189 req = list_entry(ptr, struct ci_hw_req, queue); 190 191 list_for_each_entry_safe(node, tmpnode, &req->tds, td) { 192 seq_printf(s, "EP=%02i: TD=%08X %s\n", 193 i % (ci->hw_ep_max / 2), 194 (u32)node->dma, 195 ((i < ci->hw_ep_max/2) ? 196 "RX" : "TX")); 197 198 for (j = 0; j < qsize; j++) 199 seq_printf(s, " %04X: %08X\n", j, 200 *((u32 *)node->ptr + j)); 201 } 202 } 203 spin_unlock_irqrestore(&ci->lock, flags); 204 205 return 0; 206 } 207 208 static int ci_requests_open(struct inode *inode, struct file *file) 209 { 210 return single_open(file, ci_requests_show, inode->i_private); 211 } 212 213 static const struct file_operations ci_requests_fops = { 214 .open = ci_requests_open, 215 .read = seq_read, 216 .llseek = seq_lseek, 217 .release = single_release, 218 }; 219 220 static int ci_otg_show(struct seq_file *s, void *unused) 221 { 222 struct ci_hdrc *ci = s->private; 223 struct otg_fsm *fsm; 224 225 if (!ci || !ci_otg_is_fsm_mode(ci)) 226 return 0; 227 228 fsm = &ci->fsm; 229 230 /* ------ State ----- */ 231 seq_printf(s, "OTG state: %s\n\n", 232 usb_otg_state_string(ci->otg.state)); 233 234 /* ------ State Machine Variables ----- */ 235 seq_printf(s, "a_bus_drop: %d\n", fsm->a_bus_drop); 236 237 seq_printf(s, "a_bus_req: %d\n", fsm->a_bus_req); 238 239 seq_printf(s, "a_srp_det: %d\n", fsm->a_srp_det); 240 241 seq_printf(s, "a_vbus_vld: %d\n", fsm->a_vbus_vld); 242 243 seq_printf(s, "b_conn: %d\n", fsm->b_conn); 244 245 seq_printf(s, "adp_change: %d\n", fsm->adp_change); 246 247 seq_printf(s, "power_up: %d\n", fsm->power_up); 248 249 seq_printf(s, "a_bus_resume: %d\n", fsm->a_bus_resume); 250 251 seq_printf(s, "a_bus_suspend: %d\n", fsm->a_bus_suspend); 252 253 seq_printf(s, "a_conn: %d\n", fsm->a_conn); 254 255 seq_printf(s, "b_bus_req: %d\n", fsm->b_bus_req); 256 257 seq_printf(s, "b_bus_suspend: %d\n", fsm->b_bus_suspend); 258 259 seq_printf(s, "b_se0_srp: %d\n", fsm->b_se0_srp); 260 261 seq_printf(s, "b_ssend_srp: %d\n", fsm->b_ssend_srp); 262 263 seq_printf(s, "b_sess_vld: %d\n", fsm->b_sess_vld); 264 265 seq_printf(s, "b_srp_done: %d\n", fsm->b_srp_done); 266 267 seq_printf(s, "drv_vbus: %d\n", fsm->drv_vbus); 268 269 seq_printf(s, "loc_conn: %d\n", fsm->loc_conn); 270 271 seq_printf(s, "loc_sof: %d\n", fsm->loc_sof); 272 273 seq_printf(s, "adp_prb: %d\n", fsm->adp_prb); 274 275 seq_printf(s, "id: %d\n", fsm->id); 276 277 seq_printf(s, "protocol: %d\n", fsm->protocol); 278 279 return 0; 280 } 281 282 static int ci_otg_open(struct inode *inode, struct file *file) 283 { 284 return single_open(file, ci_otg_show, inode->i_private); 285 } 286 287 static const struct file_operations ci_otg_fops = { 288 .open = ci_otg_open, 289 .read = seq_read, 290 .llseek = seq_lseek, 291 .release = single_release, 292 }; 293 294 static int ci_role_show(struct seq_file *s, void *data) 295 { 296 struct ci_hdrc *ci = s->private; 297 298 seq_printf(s, "%s\n", ci_role(ci)->name); 299 300 return 0; 301 } 302 303 static ssize_t ci_role_write(struct file *file, const char __user *ubuf, 304 size_t count, loff_t *ppos) 305 { 306 struct seq_file *s = file->private_data; 307 struct ci_hdrc *ci = s->private; 308 enum ci_role role; 309 char buf[8]; 310 int ret; 311 312 if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) 313 return -EFAULT; 314 315 for (role = CI_ROLE_HOST; role < CI_ROLE_END; role++) 316 if (ci->roles[role] && 317 !strncmp(buf, ci->roles[role]->name, 318 strlen(ci->roles[role]->name))) 319 break; 320 321 if (role == CI_ROLE_END || role == ci->role) 322 return -EINVAL; 323 324 pm_runtime_get_sync(ci->dev); 325 disable_irq(ci->irq); 326 ci_role_stop(ci); 327 ret = ci_role_start(ci, role); 328 enable_irq(ci->irq); 329 pm_runtime_put_sync(ci->dev); 330 331 return ret ? ret : count; 332 } 333 334 static int ci_role_open(struct inode *inode, struct file *file) 335 { 336 return single_open(file, ci_role_show, inode->i_private); 337 } 338 339 static const struct file_operations ci_role_fops = { 340 .open = ci_role_open, 341 .write = ci_role_write, 342 .read = seq_read, 343 .llseek = seq_lseek, 344 .release = single_release, 345 }; 346 347 static int ci_registers_show(struct seq_file *s, void *unused) 348 { 349 struct ci_hdrc *ci = s->private; 350 u32 tmp_reg; 351 352 if (!ci || ci->in_lpm) 353 return -EPERM; 354 355 /* ------ Registers ----- */ 356 tmp_reg = hw_read_intr_enable(ci); 357 seq_printf(s, "USBINTR reg: %08x\n", tmp_reg); 358 359 tmp_reg = hw_read_intr_status(ci); 360 seq_printf(s, "USBSTS reg: %08x\n", tmp_reg); 361 362 tmp_reg = hw_read(ci, OP_USBMODE, ~0); 363 seq_printf(s, "USBMODE reg: %08x\n", tmp_reg); 364 365 tmp_reg = hw_read(ci, OP_USBCMD, ~0); 366 seq_printf(s, "USBCMD reg: %08x\n", tmp_reg); 367 368 tmp_reg = hw_read(ci, OP_PORTSC, ~0); 369 seq_printf(s, "PORTSC reg: %08x\n", tmp_reg); 370 371 if (ci->is_otg) { 372 tmp_reg = hw_read_otgsc(ci, ~0); 373 seq_printf(s, "OTGSC reg: %08x\n", tmp_reg); 374 } 375 376 return 0; 377 } 378 379 static int ci_registers_open(struct inode *inode, struct file *file) 380 { 381 return single_open(file, ci_registers_show, inode->i_private); 382 } 383 384 static const struct file_operations ci_registers_fops = { 385 .open = ci_registers_open, 386 .read = seq_read, 387 .llseek = seq_lseek, 388 .release = single_release, 389 }; 390 391 /** 392 * dbg_create_files: initializes the attribute interface 393 * @ci: device 394 * 395 * This function returns an error code 396 */ 397 int dbg_create_files(struct ci_hdrc *ci) 398 { 399 struct dentry *dent; 400 401 ci->debugfs = debugfs_create_dir(dev_name(ci->dev), NULL); 402 if (!ci->debugfs) 403 return -ENOMEM; 404 405 dent = debugfs_create_file("device", S_IRUGO, ci->debugfs, ci, 406 &ci_device_fops); 407 if (!dent) 408 goto err; 409 410 dent = debugfs_create_file("port_test", S_IRUGO | S_IWUSR, ci->debugfs, 411 ci, &ci_port_test_fops); 412 if (!dent) 413 goto err; 414 415 dent = debugfs_create_file("qheads", S_IRUGO, ci->debugfs, ci, 416 &ci_qheads_fops); 417 if (!dent) 418 goto err; 419 420 dent = debugfs_create_file("requests", S_IRUGO, ci->debugfs, ci, 421 &ci_requests_fops); 422 if (!dent) 423 goto err; 424 425 if (ci_otg_is_fsm_mode(ci)) { 426 dent = debugfs_create_file("otg", S_IRUGO, ci->debugfs, ci, 427 &ci_otg_fops); 428 if (!dent) 429 goto err; 430 } 431 432 dent = debugfs_create_file("role", S_IRUGO | S_IWUSR, ci->debugfs, ci, 433 &ci_role_fops); 434 if (!dent) 435 goto err; 436 437 dent = debugfs_create_file("registers", S_IRUGO, ci->debugfs, ci, 438 &ci_registers_fops); 439 440 if (dent) 441 return 0; 442 err: 443 debugfs_remove_recursive(ci->debugfs); 444 return -ENOMEM; 445 } 446 447 /** 448 * dbg_remove_files: destroys the attribute interface 449 * @ci: device 450 */ 451 void dbg_remove_files(struct ci_hdrc *ci) 452 { 453 debugfs_remove_recursive(ci->debugfs); 454 } 455