drivers/usb/host/whci/debug.c

   1 /*
   2  * Wireless Host Controller (WHC) debug.
   3  *
   4  * Copyright (C) 2008 Cambridge Silicon Radio Ltd.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License version
   8  * 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18 #include <linux/slab.h>
  19 #include <linux/kernel.h>
  20 #include <linux/debugfs.h>
  21 #include <linux/seq_file.h>
  22
  23 #include "../../wusbcore/wusbhc.h"
  24
  25 #include "whcd.h"
  26
  27 struct whc_dbg {
  28         struct dentry *di_f;
  29         struct dentry *asl_f;
  30         struct dentry *pzl_f;
  31 };
  32
  33 static void qset_print(struct seq_file *s, struct whc_qset *qset)
  34 {
  35         static const char *qh_type[] = {
  36                 "ctrl", "isoc", "bulk", "intr", "rsvd", "rsvd", "rsvd", "lpintr", };
  37         struct whc_std *std;
  38         struct urb *urb = NULL;
  39         int i;
  40
  41         seq_printf(s, "qset %08x", (u32)qset->qset_dma);
  42         if (&qset->list_node == qset->whc->async_list.prev) {
  43                 seq_printf(s, " (dummy)\n");
  44         } else {
  45                 seq_printf(s, " ep%d%s-%s maxpkt: %d\n",
  46                            qset->qh.info1 & 0x0f,
  47                            (qset->qh.info1 >> 4) & 0x1 ? "in" : "out",
  48                            qh_type[(qset->qh.info1 >> 5) & 0x7],
  49                            (qset->qh.info1 >> 16) & 0xffff);
  50         }
  51         seq_printf(s, "  -> %08x\n", (u32)qset->qh.link);
  52         seq_printf(s, "  info: %08x %08x %08x\n",
  53                    qset->qh.info1, qset->qh.info2,  qset->qh.info3);
  54         seq_printf(s, "  sts: %04x errs: %d curwin: %08x\n",
  55                    qset->qh.status, qset->qh.err_count, qset->qh.cur_window);
  56         seq_printf(s, "  TD: sts: %08x opts: %08x\n",
  57                    qset->qh.overlay.qtd.status, qset->qh.overlay.qtd.options);
  58
  59         for (i = 0; i < WHCI_QSET_TD_MAX; i++) {
  60                 seq_printf(s, "  %c%c TD[%d]: sts: %08x opts: %08x ptr: %08x\n",
  61                         i == qset->td_start ? 'S' : ' ',
  62                         i == qset->td_end ? 'E' : ' ',
  63                         i, qset->qtd[i].status, qset->qtd[i].options,
  64                         (u32)qset->qtd[i].page_list_ptr);
  65         }
  66         seq_printf(s, "  ntds: %d\n", qset->ntds);
  67         list_for_each_entry(std, &qset->stds, list_node) {
  68                 if (urb != std->urb) {
  69                         urb = std->urb;
  70                         seq_printf(s, "  urb %p transferred: %d bytes\n", urb,
  71                                 urb->actual_length);
  72                 }
  73                 if (std->qtd)
  74                         seq_printf(s, "    sTD[%td]: %zu bytes @ %08x\n",
  75                                 std->qtd - &qset->qtd[0],
  76                                 std->len, std->num_pointers ?
  77                                 (u32)(std->pl_virt[0].buf_ptr) : (u32)std->dma_addr);
  78                 else
  79                         seq_printf(s, "    sTD[-]: %zd bytes @ %08x\n",
  80                                 std->len, std->num_pointers ?
  81                                 (u32)(std->pl_virt[0].buf_ptr) : (u32)std->dma_addr);
  82         }
  83 }
  84
  85 static int di_print(struct seq_file *s, void *p)
  86 {
  87         struct whc *whc = s->private;
  88         char buf[72];
  89         int d;
  90
  91         for (d = 0; d < whc->n_devices; d++) {
  92                 struct di_buf_entry *di = &whc->di_buf[d];
  93
  94                 bitmap_scnprintf(buf, sizeof(buf),
  95                                  (unsigned long *)di->availability_info, UWB_NUM_MAS);
  96
  97                 seq_printf(s, "DI[%d]\n", d);
  98                 seq_printf(s, "  availability: %s\n", buf);
  99                 seq_printf(s, "  %c%c key idx: %d dev addr: %d\n",
 100                            (di->addr_sec_info & WHC_DI_SECURE) ? 'S' : ' ',
 101                            (di->addr_sec_info & WHC_DI_DISABLE) ? 'D' : ' ',
 102                            (di->addr_sec_info & WHC_DI_KEY_IDX_MASK) >> 8,
 103                            (di->addr_sec_info & WHC_DI_DEV_ADDR_MASK));
 104         }
 105         return 0;
 106 }
 107
 108 static int asl_print(struct seq_file *s, void *p)
 109 {
 110         struct whc *whc = s->private;
 111         struct whc_qset *qset;
 112
 113         list_for_each_entry(qset, &whc->async_list, list_node) {
 114                 qset_print(s, qset);
 115         }
 116
 117         return 0;
 118 }
 119
 120 static int pzl_print(struct seq_file *s, void *p)
 121 {
 122         struct whc *whc = s->private;
 123         struct whc_qset *qset;
 124         int period;
 125
 126         for (period = 0; period < 5; period++) {
 127                 seq_printf(s, "Period %d\n", period);
 128                 list_for_each_entry(qset, &whc->periodic_list[period], list_node) {
 129                         qset_print(s, qset);
 130                 }
 131         }
 132         return 0;
 133 }
 134
 135 static int di_open(struct inode *inode, struct file *file)
 136 {
 137         return single_open(file, di_print, inode->i_private);
 138 }
 139
 140 static int asl_open(struct inode *inode, struct file *file)
 141 {
 142         return single_open(file, asl_print, inode->i_private);
 143 }
 144
 145 static int pzl_open(struct inode *inode, struct file *file)
 146 {
 147         return single_open(file, pzl_print, inode->i_private);
 148 }
 149
 150 static const struct file_operations di_fops = {
 151         .open    = di_open,
 152         .read    = seq_read,
 153         .llseek  = seq_lseek,
 154         .release = single_release,
 155         .owner   = THIS_MODULE,
 156 };
 157
 158 static const struct file_operations asl_fops = {
 159         .open    = asl_open,
 160         .read    = seq_read,
 161         .llseek  = seq_lseek,
 162         .release = single_release,
 163         .owner   = THIS_MODULE,
 164 };
 165
 166 static const struct file_operations pzl_fops = {
 167         .open    = pzl_open,
 168         .read    = seq_read,
 169         .llseek  = seq_lseek,
 170         .release = single_release,
 171         .owner   = THIS_MODULE,
 172 };
 173
 174 void whc_dbg_init(struct whc *whc)
 175 {
 176         if (whc->wusbhc.pal.debugfs_dir == NULL)
 177                 return;
 178
 179         whc->dbg = kzalloc(sizeof(struct whc_dbg), GFP_KERNEL);
 180         if (whc->dbg == NULL)
 181                 return;
 182
 183         whc->dbg->di_f = debugfs_create_file("di", 0444,
 184                                               whc->wusbhc.pal.debugfs_dir, whc,
 185                                               &di_fops);
 186         whc->dbg->asl_f = debugfs_create_file("asl", 0444,
 187                                               whc->wusbhc.pal.debugfs_dir, whc,
 188                                               &asl_fops);
 189         whc->dbg->pzl_f = debugfs_create_file("pzl", 0444,
 190                                               whc->wusbhc.pal.debugfs_dir, whc,
 191                                               &pzl_fops);
 192 }
 193
 194 void whc_dbg_clean_up(struct whc *whc)
 195 {
 196         if (whc->dbg) {
 197                 debugfs_remove(whc->dbg->pzl_f);
 198                 debugfs_remove(whc->dbg->asl_f);
 199                 debugfs_remove(whc->dbg->di_f);
 200                 kfree(whc->dbg);
 201         }
 202 }