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