package/bcm43xx-mac80211/src/bcm43xx/bcm43xx_debugfs.c

   1 /*
   2
   3   Broadcom BCM43xx wireless driver
   4
   5   debugfs driver debugging code
   6
   7   Copyright (c) 2005 Michael Buesch <mb@bu3sch.de>
   8
   9   This program is free software; you can redistribute it and/or modify
  10   it under the terms of the GNU General Public License as published by
  11   the Free Software Foundation; either version 2 of the License, or
  12   (at your option) any later version.
  13
  14   This program is distributed in the hope that it will be useful,
  15   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17   GNU General Public License for more details.
  18
  19   You should have received a copy of the GNU General Public License
  20   along with this program; see the file COPYING.  If not, write to
  21   the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
  22   Boston, MA 02110-1301, USA.
  23
  24 */
  25
  26
  27
  28 #include <linux/fs.h>
  29 #include <linux/debugfs.h>
  30 #include <linux/slab.h>
  31 #include <linux/netdevice.h>
  32 #include <linux/pci.h>
  33 #include <linux/mutex.h>
  34
  35 #include "bcm43xx.h"
  36 #include "bcm43xx_main.h"
  37 #include "bcm43xx_debugfs.h"
  38 #include "bcm43xx_dma.h"
  39 #include "bcm43xx_pio.h"
  40 #include "bcm43xx_xmit.h"
  41
  42 #define REALLY_BIG_BUFFER_SIZE  (1024*256)
  43
  44 static struct bcm43xx_debugfs fs;
  45 static char big_buffer[1024*256];
  46 static DEFINE_MUTEX(big_buffer_mutex);
  47
  48
  49 static ssize_t write_file_dummy(struct file *file, const char __user *buf,
  50                                 size_t count, loff_t *ppos)
  51 {
  52         return count;
  53 }
  54
  55 static int open_file_generic(struct inode *inode, struct file *file)
  56 {
  57         file->private_data = inode->i_private;
  58         return 0;
  59 }
  60
  61 #define fappend(fmt, x...)      pos += snprintf(buf + pos, len - pos, fmt , ##x)
  62
  63 static ssize_t drvinfo_read_file(struct file *file, char __user *userbuf,
  64                                  size_t count, loff_t *ppos)
  65 {
  66         const size_t len = ARRAY_SIZE(big_buffer);
  67         char *buf = big_buffer;
  68         size_t pos = 0;
  69         ssize_t res;
  70
  71         mutex_lock(&big_buffer_mutex);
  72         /* This is where the information is written to the "driver" file */
  73         fappend(KBUILD_MODNAME " driver\n");
  74         fappend("Compiled at: %s %s\n", __DATE__, __TIME__);
  75         res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
  76         mutex_unlock(&big_buffer_mutex);
  77
  78         return res;
  79 }
  80
  81 static ssize_t tsf_read_file(struct file *file, char __user *userbuf,
  82                              size_t count, loff_t *ppos)
  83 {
  84         struct bcm43xx_wldev *dev = file->private_data;
  85         const size_t len = ARRAY_SIZE(big_buffer);
  86         char *buf = big_buffer;
  87         size_t pos = 0;
  88         ssize_t res;
  89         unsigned long flags;
  90         u64 tsf;
  91
  92         mutex_lock(&big_buffer_mutex);
  93         mutex_lock(&dev->wl->mutex);
  94         spin_lock_irqsave(&dev->wl->irq_lock, flags);
  95         if (bcm43xx_status(dev) != BCM43xx_STAT_INITIALIZED) {
  96                 fappend("Board not initialized.\n");
  97                 goto out;
  98         }
  99         bcm43xx_tsf_read(dev, &tsf);
 100         fappend("0x%08x%08x\n",
 101                 (unsigned int)((tsf & 0xFFFFFFFF00000000ULL) >> 32),
 102                 (unsigned int)(tsf & 0xFFFFFFFFULL));
 103
 104 out:
 105         spin_unlock_irqrestore(&dev->wl->irq_lock, flags);
 106         mutex_unlock(&dev->wl->mutex);
 107         res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
 108         mutex_unlock(&big_buffer_mutex);
 109
 110         return res;
 111 }
 112
 113 static ssize_t tsf_write_file(struct file *file, const char __user *user_buf,
 114                               size_t count, loff_t *ppos)
 115 {
 116         struct bcm43xx_wldev *dev = file->private_data;
 117         char *buf = big_buffer;
 118         ssize_t buf_size;
 119         ssize_t res;
 120         unsigned long flags;
 121         u64 tsf;
 122
 123         mutex_lock(&big_buffer_mutex);
 124         buf_size = min(count, ARRAY_SIZE(big_buffer) - 1);
 125         if (copy_from_user(buf, user_buf, buf_size)) {
 126                 res = -EFAULT;
 127                 goto out_unlock_bb;
 128         }
 129         mutex_lock(&dev->wl->mutex);
 130         spin_lock_irqsave(&dev->wl->irq_lock, flags);
 131         if (bcm43xx_status(dev) != BCM43xx_STAT_INITIALIZED) {
 132                 printk(KERN_INFO PFX "debugfs: Board not initialized.\n");
 133                 res = -EFAULT;
 134                 goto out_unlock;
 135         }
 136         if (sscanf(buf, "%llu", (unsigned long long *)(&tsf)) != 1) {
 137                 printk(KERN_INFO PFX "debugfs: invalid values for \"tsf\"\n");
 138                 res = -EINVAL;
 139                 goto out_unlock;
 140         }
 141         bcm43xx_tsf_write(dev, tsf);
 142         mmiowb();
 143         res = buf_size;
 144
 145 out_unlock:
 146         spin_unlock_irqrestore(&dev->wl->irq_lock, flags);
 147         mutex_unlock(&dev->wl->mutex);
 148 out_unlock_bb:
 149         mutex_unlock(&big_buffer_mutex);
 150
 151         return res;
 152 }
 153
 154 static ssize_t txstat_read_file(struct file *file, char __user *userbuf,
 155                                 size_t count, loff_t *ppos)
 156 {
 157         struct bcm43xx_wldev *dev = file->private_data;
 158         struct bcm43xx_dfsentry *e = dev->dfsentry;
 159         struct bcm43xx_txstatus_log *log = &e->txstatlog;
 160         unsigned long flags;
 161         char *buf = log->printbuf;
 162         const size_t len = ARRAY_SIZE(log->printbuf);
 163         size_t pos = 0;
 164         ssize_t res;
 165         int i, idx;
 166         struct bcm43xx_txstatus *stat;
 167
 168         mutex_lock(&big_buffer_mutex);
 169         spin_lock_irqsave(&log->lock, flags);
 170         if (!log->printing) {
 171                 log->printing = 1;
 172                 fappend("bcm43xx TX status reports:\n\n"
 173                         "index | cookie | seq | phy_stat | frame_count | "
 174                         "rts_count | supp_reason | pm_indicated | "
 175                         "intermediate | for_ampdu | acked\n"
 176                         "---\n");
 177                 i = log->end + 1;
 178                 idx = 0;
 179                 while (1) {
 180                         if (i == BCM43xx_NR_LOGGED_TXSTATUS)
 181                                 i = 0;
 182                         stat = &(log->log[i]);
 183                         if (stat->cookie) {
 184                                 fappend("%03d | "
 185                                         "0x%04X | 0x%04X | 0x%02X | "
 186                                         "0x%X | 0x%X | "
 187                                         "%u | %u | "
 188                                         "%u | %u | %u\n",
 189                                         idx,
 190                                         stat->cookie, stat->seq, stat->phy_stat,
 191                                         stat->frame_count, stat->rts_count,
 192                                         stat->supp_reason, stat->pm_indicated,
 193                                         stat->intermediate, stat->for_ampdu,
 194                                         stat->acked);
 195                                 idx++;
 196                         }
 197                         if (i == log->end)
 198                                 break;
 199                         i++;
 200                 }
 201                 log->buf_avail = pos;
 202         }
 203         memcpy(big_buffer, buf,
 204                min(log->buf_avail, ARRAY_SIZE(big_buffer)));
 205         spin_unlock_irqrestore(&log->lock, flags);
 206
 207         res = simple_read_from_buffer(userbuf, count, ppos,
 208                                       big_buffer,
 209                                       log->buf_avail);
 210         if (*ppos == log->buf_avail) {
 211                 spin_lock_irqsave(&log->lock, flags);
 212                 log->printing = 0;
 213                 spin_unlock_irqrestore(&log->lock, flags);
 214         }
 215         mutex_unlock(&big_buffer_mutex);
 216
 217         return res;
 218 }
 219
 220 static ssize_t restart_write_file(struct file *file, const char __user *user_buf,
 221                                   size_t count, loff_t *ppos)
 222 {
 223         struct bcm43xx_wldev *dev = file->private_data;
 224         char *buf = big_buffer;
 225         ssize_t buf_size;
 226         ssize_t res;
 227         unsigned long flags;
 228
 229         mutex_lock(&big_buffer_mutex);
 230         buf_size = min(count, ARRAY_SIZE(big_buffer) - 1);
 231         if (copy_from_user(buf, user_buf, buf_size)) {
 232                 res = -EFAULT;
 233                 goto out_unlock_bb;
 234         }
 235         mutex_lock(&dev->wl->mutex);
 236         spin_lock_irqsave(&dev->wl->irq_lock, flags);
 237         if (bcm43xx_status(dev) != BCM43xx_STAT_INITIALIZED) {
 238                 printk(KERN_INFO PFX "debugfs: Board not initialized.\n");
 239                 res = -EFAULT;
 240                 goto out_unlock;
 241         }
 242         if (count > 0 && buf[0] == '1') {
 243                 bcm43xx_controller_restart(dev, "manually restarted");
 244                 res = count;
 245         } else
 246                 res = -EINVAL;
 247
 248 out_unlock:
 249         spin_unlock_irqrestore(&dev->wl->irq_lock, flags);
 250         mutex_unlock(&dev->wl->mutex);
 251 out_unlock_bb:
 252         mutex_unlock(&big_buffer_mutex);
 253
 254         return res;
 255 }
 256
 257 static ssize_t txpower_g_read_file(struct file *file, char __user *userbuf,
 258                                    size_t count, loff_t *ppos)
 259 {
 260         struct bcm43xx_wldev *dev = file->private_data;
 261         const size_t len = ARRAY_SIZE(big_buffer);
 262         char *buf = big_buffer;
 263         size_t pos = 0;
 264         ssize_t res;
 265         unsigned long flags;
 266
 267         mutex_lock(&big_buffer_mutex);
 268         mutex_lock(&dev->wl->mutex);
 269         spin_lock_irqsave(&dev->wl->irq_lock, flags);
 270         if ((bcm43xx_status(dev) != BCM43xx_STAT_INITIALIZED) ||
 271             !dev->started) {
 272                 fappend("Not initialized\n");
 273                 goto out;
 274         }
 275         if (dev->phy.type != BCM43xx_PHYTYPE_G) {
 276                 fappend("Device is not a G-PHY\n");
 277                 goto out;
 278         }
 279         fappend("Control:               %s\n", dev->phy.manual_txpower_control ?
 280                                                "MANUAL" : "AUTOMATIC");
 281         fappend("Baseband attenuation:  %u\n", dev->phy.bbatt.att);
 282         fappend("Radio attenuation:     %u\n", dev->phy.rfatt.att);
 283         fappend("TX Mixer Gain:         %s\n", (dev->phy.tx_control & BCM43xx_TXCTL_TXMIX) ?
 284                                                "ON" : "OFF");
 285         fappend("PA Gain 2dB:           %s\n", (dev->phy.tx_control & BCM43xx_TXCTL_PA2DB) ?
 286                                                "ON" : "OFF");
 287         fappend("PA Gain 3dB:           %s\n", (dev->phy.tx_control & BCM43xx_TXCTL_PA3DB) ?
 288                                                "ON" : "OFF");
 289         fappend("\n\n");
 290         fappend("You can write to this file:\n");
 291         fappend("Writing \"auto\" enables automatic txpower control.\n");
 292         fappend("Writing the attenuation values as \"bbatt rfatt txmix pa2db pa3db\" "
 293                 "enables manual txpower control.\n");
 294         fappend("Example: 5 4 0 0 1\n");
 295         fappend("Enables manual control with Baseband attenuation 5, "
 296                 "Radio attenuation 4, No TX Mixer Gain, "
 297                 "No PA Gain 2dB, With PA Gain 3dB.\n");
 298
 299 out:
 300         spin_unlock_irqrestore(&dev->wl->irq_lock, flags);
 301         mutex_unlock(&dev->wl->mutex);
 302         res = simple_read_from_buffer(userbuf, count, ppos, buf, pos);
 303         mutex_unlock(&big_buffer_mutex);
 304
 305         return res;
 306 }
 307
 308 static ssize_t txpower_g_write_file(struct file *file, const char __user *user_buf,
 309                                     size_t count, loff_t *ppos)
 310 {
 311         struct bcm43xx_wldev *dev = file->private_data;
 312         char *buf = big_buffer;
 313         ssize_t buf_size;
 314         ssize_t res;
 315         unsigned long flags, phy_flags;
 316
 317         mutex_lock(&big_buffer_mutex);
 318         buf_size = min(count, ARRAY_SIZE(big_buffer) - 1);
 319         if (copy_from_user(buf, user_buf, buf_size)) {
 320                 res = -EFAULT;
 321                 goto out_unlock_bb;
 322         }
 323         mutex_lock(&dev->wl->mutex);
 324         spin_lock_irqsave(&dev->wl->irq_lock, flags);
 325         if ((bcm43xx_status(dev) != BCM43xx_STAT_INITIALIZED) ||
 326             !dev->started) {
 327                 printk(KERN_INFO PFX "debugfs: Board not initialized.\n");
 328                 res = -ENODEV;
 329                 goto out_unlock;
 330         }
 331         if (dev->phy.type != BCM43xx_PHYTYPE_G) {
 332                 printk(KERN_ERR PFX "debugfs: Device is not a G-PHY\n");
 333                 res = -ENODEV;
 334                 goto out_unlock;
 335         }
 336         if ((buf_size >= 4) && (memcmp(buf, "auto", 4) == 0)) {
 337                 /* Automatic control */
 338                 dev->phy.manual_txpower_control = 0;
 339                 bcm43xx_phy_xmitpower(dev);
 340         } else {
 341                 int bbatt = 0, rfatt = 0, txmix = 0, pa2db = 0, pa3db = 0;
 342                 /* Manual control */
 343                 if (sscanf(buf, "%d %d %d %d %d", &bbatt, &rfatt,
 344                            &txmix, &pa2db, &pa3db) != 5) {
 345                         printk(KERN_INFO PFX "debugfs: invalid value for \"tx_power_g\"\n");
 346                         res = -EINVAL;
 347                         goto out_unlock;
 348                 }
 349                 bcm43xx_put_attenuation_into_ranges(dev, &bbatt, &rfatt);
 350                 dev->phy.manual_txpower_control = 1;
 351                 dev->phy.bbatt.att = bbatt;
 352                 dev->phy.rfatt.att = rfatt;
 353                 dev->phy.tx_control = 0;
 354                 if (txmix)
 355                         dev->phy.tx_control |= BCM43xx_TXCTL_TXMIX;
 356                 if (pa2db)
 357                         dev->phy.tx_control |= BCM43xx_TXCTL_PA2DB;
 358                 if (pa3db)
 359                         dev->phy.tx_control |= BCM43xx_TXCTL_PA3DB;
 360                 bcm43xx_phy_lock(dev, phy_flags);
 361                 bcm43xx_radio_lock(dev);
 362                 bcm43xx_set_txpower_g(dev, &dev->phy.bbatt,
 363                                       &dev->phy.rfatt, dev->phy.tx_control);
 364                 bcm43xx_radio_unlock(dev);
 365                 bcm43xx_phy_unlock(dev, phy_flags);
 366         }
 367         res = buf_size;
 368 out_unlock:
 369         spin_unlock_irqrestore(&dev->wl->irq_lock, flags);
 370         mutex_unlock(&dev->wl->mutex);
 371 out_unlock_bb:
 372         mutex_unlock(&big_buffer_mutex);
 373
 374         return res;
 375 }
 376
 377
 378 #undef fappend
 379
 380
 381 static struct file_operations drvinfo_fops = {
 382         .read = drvinfo_read_file,
 383         .write = write_file_dummy,
 384         .open = open_file_generic,
 385 };
 386
 387 static struct file_operations tsf_fops = {
 388         .read = tsf_read_file,
 389         .write = tsf_write_file,
 390         .open = open_file_generic,
 391 };
 392
 393 static struct file_operations txstat_fops = {
 394         .read = txstat_read_file,
 395         .write = write_file_dummy,
 396         .open = open_file_generic,
 397 };
 398
 399 static struct file_operations txpower_g_fops = {
 400         .read = txpower_g_read_file,
 401         .write = txpower_g_write_file,
 402         .open = open_file_generic,
 403 };
 404
 405 static struct file_operations restart_fops = {
 406         .write = restart_write_file,
 407         .open = open_file_generic,
 408 };
 409
 410
 411 int bcm43xx_debug(struct bcm43xx_wldev *dev, enum bcm43xx_dyndbg feature)
 412 {
 413         return !!(dev->dfsentry->dyn_debug[feature]);
 414 }
 415
 416 static void bcm43xx_remove_dynamic_debug(struct bcm43xx_wldev *dev)
 417 {
 418         struct bcm43xx_dfsentry *e = dev->dfsentry;
 419         int i;
 420
 421         for (i = 0; i < __BCM43xx_NR_DYNDBG; i++)
 422                 debugfs_remove(e->dyn_debug_dentries[i]);
 423 }
 424
 425 static void bcm43xx_add_dynamic_debug(struct bcm43xx_wldev *dev)
 426 {
 427         struct bcm43xx_dfsentry *e = dev->dfsentry;
 428         struct dentry *d;
 429
 430 #define add_dyn_dbg(name, id, initstate) do {           \
 431         e->dyn_debug[id] = (initstate);                 \
 432         d = debugfs_create_bool(name, 0600, e->subdir,  \
 433                                 &(e->dyn_debug[id]));   \
 434         if (!IS_ERR(d))                                 \
 435                 e->dyn_debug_dentries[id] = d;          \
 436                                 } while (0)
 437
 438         add_dyn_dbg("debug_xmitpower", BCM43xx_DBG_XMITPOWER, 0);
 439         add_dyn_dbg("debug_dmaoverflow", BCM43xx_DBG_DMAOVERFLOW, 0);
 440         add_dyn_dbg("debug_pwork_fast", BCM43xx_DBG_PWORK_FAST, 0);
 441         add_dyn_dbg("debug_pwork_stop", BCM43xx_DBG_PWORK_STOP, 0);
 442
 443 #undef add_dyn_dbg
 444 }
 445
 446 void bcm43xx_debugfs_add_device(struct bcm43xx_wldev *dev)
 447 {
 448         struct bcm43xx_dfsentry *e;
 449         struct bcm43xx_txstatus_log *log;
 450         char devdir[16];
 451
 452         assert(dev);
 453         e = kzalloc(sizeof(*e), GFP_KERNEL);
 454         if (!e) {
 455                 printk(KERN_ERR PFX "debugfs: add device OOM\n");
 456                 return;
 457         }
 458         e->dev = dev;
 459         log = &e->txstatlog;
 460         log->log = kcalloc(BCM43xx_NR_LOGGED_TXSTATUS,
 461                            sizeof(struct bcm43xx_txstatus),
 462                            GFP_KERNEL);
 463         if (!log->log) {
 464                 printk(KERN_ERR PFX "debugfs: add device txstatus OOM\n");
 465                 kfree(e);
 466                 return;
 467         }
 468         log->end = -1;
 469         spin_lock_init(&log->lock);
 470
 471         dev->dfsentry = e;
 472
 473         snprintf(devdir, sizeof(devdir), "%s", wiphy_name(dev->wl->hw->wiphy));
 474         e->subdir = debugfs_create_dir(devdir, fs.root);
 475         if (!e->subdir || IS_ERR(e->subdir)) {
 476                 e->subdir = NULL;
 477                 kfree(log->log);
 478                 kfree(e);
 479                 return;
 480         }
 481
 482         e->dentry_tsf = debugfs_create_file("tsf", 0600, e->subdir,
 483                                             dev, &tsf_fops);
 484         if (IS_ERR(e->dentry_tsf))
 485                 e->dentry_tsf = NULL;
 486         e->dentry_txstat = debugfs_create_file("tx_status", 0400, e->subdir,
 487                                                 dev, &txstat_fops);
 488         if (IS_ERR(e->dentry_txstat))
 489                 e->dentry_txstat = NULL;
 490         e->dentry_txpower_g = debugfs_create_file("tx_power_g", 0600, e->subdir,
 491                                                   dev, &txpower_g_fops);
 492         if (IS_ERR(e->dentry_txpower_g))
 493                 e->dentry_txpower_g = NULL;
 494         e->dentry_restart = debugfs_create_file("restart", 0200, e->subdir,
 495                                                 dev, &restart_fops);
 496         if (IS_ERR(e->dentry_restart))
 497                 e->dentry_restart = NULL;
 498
 499         bcm43xx_add_dynamic_debug(dev);
 500 }
 501
 502 void bcm43xx_debugfs_remove_device(struct bcm43xx_wldev *dev)
 503 {
 504         struct bcm43xx_dfsentry *e;
 505
 506         if (!dev)
 507                 return;
 508         e = dev->dfsentry;
 509         if (!e)
 510                 return;
 511         bcm43xx_remove_dynamic_debug(dev);
 512         debugfs_remove(e->dentry_tsf);
 513         debugfs_remove(e->dentry_txstat);
 514         debugfs_remove(e->dentry_restart);
 515         debugfs_remove(e->dentry_txpower_g);
 516         debugfs_remove(e->subdir);
 517         kfree(e->txstatlog.log);
 518         kfree(e);
 519 }
 520
 521 void bcm43xx_debugfs_log_txstat(struct bcm43xx_wldev *dev,
 522                                 const struct bcm43xx_txstatus *status)
 523 {
 524         struct bcm43xx_dfsentry *e = dev->dfsentry;
 525         struct bcm43xx_txstatus_log *log;
 526         struct bcm43xx_txstatus *cur;
 527         int i;
 528
 529         log = &e->txstatlog;
 530         assert(irqs_disabled());
 531         spin_lock(&log->lock);
 532         i = log->end + 1;
 533         if (i == BCM43xx_NR_LOGGED_TXSTATUS)
 534                 i = 0;
 535         log->end = i;
 536         cur = &(log->log[i]);
 537         memcpy(cur, status, sizeof(*cur));
 538         spin_unlock(&log->lock);
 539 }
 540
 541 void bcm43xx_debugfs_init(void)
 542 {
 543         memset(&fs, 0, sizeof(fs));
 544         fs.root = debugfs_create_dir(KBUILD_MODNAME, NULL);
 545         if (!fs.root || IS_ERR(fs.root)) {
 546                 fs.root = NULL;
 547                 return;
 548         }
 549         fs.dentry_driverinfo = debugfs_create_file("driver", 0444, fs.root,
 550                                                    NULL, &drvinfo_fops);
 551         if (IS_ERR(fs.dentry_driverinfo))
 552                 fs.dentry_driverinfo = NULL;
 553 }
 554
 555 void bcm43xx_debugfs_exit(void)
 556 {
 557         debugfs_remove(fs.dentry_driverinfo);
 558         debugfs_remove(fs.root);
 559 }
 560
 561 void bcm43xx_printk_dump(const char *data,
 562                          size_t size,
 563                          const char *description)
 564 {
 565         unsigned int i;
 566         char c;
 567
 568         printk(KERN_INFO PFX "Data dump (%s, %lu bytes):",
 569                description, (unsigned long)size);
 570         for (i = 0; i < size; i++) {
 571                 c = data[i];
 572                 if (i % 8 == 0)
 573                         printk("\n" KERN_INFO PFX "0x%08x:  0x%02x, ", i, c & 0xff);
 574                 else
 575                         printk("0x%02x, ", c & 0xff);
 576         }
 577         printk("\n");
 578 }
 579
 580 void bcm43xx_printk_bitdump(const unsigned char *data,
 581                             size_t bytes, int msb_to_lsb,
 582                             const char *description)
 583 {
 584         unsigned int i;
 585         int j;
 586         const unsigned char *d;
 587
 588         printk(KERN_INFO PFX "*** Bitdump (%s, %lu bytes, %s) ***",
 589                description, (unsigned long)bytes,
 590                msb_to_lsb ? "MSB to LSB" : "LSB to MSB");
 591         for (i = 0; i < bytes; i++) {
 592                 d = data + i;
 593                 if (i % 8 == 0)
 594                         printk("\n" KERN_INFO PFX "0x%08x:  ", i);
 595                 if (msb_to_lsb) {
 596                         for (j = 7; j >= 0; j--) {
 597                                 if (*d & (1 << j))
 598                                         printk("1");
 599                                 else
 600                                         printk("0");
 601                         }
 602                 } else {
 603                         for (j = 0; j < 8; j++) {
 604                                 if (*d & (1 << j))
 605                                         printk("1");
 606                                 else
 607                                         printk("0");
 608                         }
 609                 }
 610                 printk(" ");
 611         }
 612         printk("\n");
 613 }