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/kernel.h>
  19 #include <linux/debugfs.h>
  20 #include <linux/seq_file.h>
  21
  22 #include "../../wusbcore/wusbhc.h"
  23
  24 #include "whcd.h"
  25
  26 struct whc_dbg {
  27         struct dentry *di_f;
  28         struct dentry *asl_f;
  29         struct dentry *pzl_f;
  30 };
  31
  32 void qset_print(struct seq_file *s, struct whc_qset *qset)
  33 {
  34         static const char *qh_type[] = {
  35                 "ctrl", "isoc", "bulk", "intr", "rsvd", "rsvd", "rsvd", "lpintr", };
  36         struct whc_std *std;
  37         struct urb *urb = NULL;
  38         int i;
  39
  40         seq_printf(s, "qset %08x", (u32)qset->qset_dma);
  41         if (&qset->list_node == qset->whc->async_list.prev) {
  42                 seq_printf(s, " (dummy)\n");
  43         } else {
  44                 seq_printf(s, " ep%d%s-%s maxpkt: %d\n",
  45                            qset->qh.info1 & 0x0f,
  46                            (qset->qh.info1 >> 4) & 0x1 ? "in" : "out",
  47                            qh_type[(qset->qh.info1 >> 5) & 0x7],
  48                            (qset->qh.info1 >> 16) & 0xffff);
  49         }
  50         seq_printf(s, "  -> %08x\n", (u32)qset->qh.link);
  51         seq_printf(s, "  info: %08x %08x %08x\n",
  52                    qset->qh.info1, qset->qh.info2,  qset->qh.info3);
  53         seq_printf(s, "  sts: %04x errs: %d curwin: %08x\n",
  54                    qset->qh.status, qset->qh.err_count, qset->qh.cur_window);
  55         seq_printf(s, "  TD: sts: %08x opts: %08x\n",
  56                    qset->qh.overlay.qtd.status, qset->qh.overlay.qtd.options);
  57
  58         for (i = 0; i < WHCI_QSET_TD_MAX; i++) {
  59                 seq_printf(s, "  %c%c TD[%d]: sts: %08x opts: %08x ptr: %08x\n",
  60                         i == qset->td_start ? 'S' : ' ',
  61                         i == qset->td_end ? 'E' : ' ',
  62                         i, qset->qtd[i].status, qset->qtd[i].options,
  63                         (u32)qset->qtd[i].page_list_ptr);
  64         }
  65         seq_printf(s, "  ntds: %d\n", qset->ntds);
  66         list_for_each_entry(std, &qset->stds, list_node) {
  67                 if (urb != std->urb) {
  68                         urb = std->urb;
  69                         seq_printf(s, "  urb %p transferred: %d bytes\n", urb,
  70                                 urb->actual_length);
  71                 }
  72                 if (std->qtd)
  73                         seq_printf(s, "    sTD[%td]: %zu bytes @ %08x\n",
  74                                 std->qtd - &qset->qtd[0],
  75                                 std->len, std->num_pointers ?
  76                                 (u32)(std->pl_virt[0].buf_ptr) : (u32)std->dma_addr);
  77                 else
  78                         seq_printf(s, "    sTD[-]: %zd bytes @ %08x\n",
  79                                 std->len, std->num_pointers ?
  80                                 (u32)(std->pl_virt[0].buf_ptr) : (u32)std->dma_addr);
  81         }
  82 }
  83
  84 static int di_print(struct seq_file *s, void *p)
  85 {
  86         struct whc *whc = s->private;
  87         char buf[72];
  88         int d;
  89
  90         for (d = 0; d < whc->n_devices; d++) {
  91                 struct di_buf_entry *di = &whc->di_buf[d];
  92
  93                 bitmap_scnprintf(buf, sizeof(buf),
  94                                  (unsigned long *)di->availability_info, UWB_NUM_MAS);
  95
  96                 seq_printf(s, "DI[%d]\n", d);
  97                 seq_printf(s, "  availability: %s\n", buf);
  98                 seq_printf(s, "  %c%c key idx: %d dev addr: %d\n",
  99                            (di->addr_sec_info & WHC_DI_SECURE) ? 'S' : ' ',
 100                            (di->addr_sec_info & WHC_DI_DISABLE) ? 'D' : ' ',
 101                            (di->addr_sec_info & WHC_DI_KEY_IDX_MASK) >> 8,
 102                            (di->addr_sec_info & WHC_DI_DEV_ADDR_MASK));
 103         }
 104         return 0;
 105 }
 106
 107 static int asl_print(struct seq_file *s, void *p)
 108 {
 109         struct whc *whc = s->private;
 110         struct whc_qset *qset;
 111
 112         list_for_each_entry(qset, &whc->async_list, list_node) {
 113                 qset_print(s, qset);
 114         }
 115
 116         return 0;
 117 }
 118
 119 static int pzl_print(struct seq_file *s, void *p)
 120 {
 121         struct whc *whc = s->private;
 122         struct whc_qset *qset;
 123         int period;
 124
 125         for (period = 0; period < 5; period++) {
 126                 seq_printf(s, "Period %d\n", period);
 127                 list_for_each_entry(qset, &whc->periodic_list[period], list_node) {
 128                         qset_print(s, qset);
 129                 }
 130         }
 131         return 0;
 132 }
 133
 134 static int di_open(struct inode *inode, struct file *file)
 135 {
 136         return single_open(file, di_print, inode->i_private);
 137 }
 138
 139 static int asl_open(struct inode *inode, struct file *file)
 140 {
 141         return single_open(file, asl_print, inode->i_private);
 142 }
 143
 144 static int pzl_open(struct inode *inode, struct file *file)
 145 {
 146         return single_open(file, pzl_print, inode->i_private);
 147 }
 148
 149 static const struct file_operations di_fops = {
 150         .open    = di_open,
 151         .read    = seq_read,
 152         .llseek  = seq_lseek,
 153         .release = single_release,
 154         .owner   = THIS_MODULE,
 155 };
 156
 157 static const struct file_operations asl_fops = {
 158         .open    = asl_open,
 159         .read    = seq_read,
 160         .llseek  = seq_lseek,
 161         .release = single_release,
 162         .owner   = THIS_MODULE,
 163 };
 164
 165 static const struct file_operations pzl_fops = {
 166         .open    = pzl_open,
 167         .read    = seq_read,
 168         .llseek  = seq_lseek,
 169         .release = single_release,
 170         .owner   = THIS_MODULE,
 171 };
 172
 173 void whc_dbg_init(struct whc *whc)
 174 {
 175         if (whc->wusbhc.pal.debugfs_dir == NULL)
 176                 return;
 177
 178         whc->dbg = kzalloc(sizeof(struct whc_dbg), GFP_KERNEL);
 179         if (whc->dbg == NULL)
 180                 return;
 181
 182         whc->dbg->di_f = debugfs_create_file("di", 0444,
 183                                               whc->wusbhc.pal.debugfs_dir, whc,
 184                                               &di_fops);
 185         whc->dbg->asl_f = debugfs_create_file("asl", 0444,
 186                                               whc->wusbhc.pal.debugfs_dir, whc,
 187                                               &asl_fops);
 188         whc->dbg->pzl_f = debugfs_create_file("pzl", 0444,
 189                                               whc->wusbhc.pal.debugfs_dir, whc,
 190                                               &pzl_fops);
 191 }
 192
 193 void whc_dbg_clean_up(struct whc *whc)
 194 {
 195         if (whc->dbg) {
 196                 debugfs_remove(whc->dbg->pzl_f);
 197                 debugfs_remove(whc->dbg->asl_f);
 198                 debugfs_remove(whc->dbg->di_f);
 199                 kfree(whc->dbg);
 200         }
 201 }