drivers/usb/chipidea/debug.c

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