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