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