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6fa3eb70 S |
1 | /* |
2 | * MUSB OTG driver debugfs support | |
3 | * | |
4 | * Copyright 2010 Nokia Corporation | |
5 | * Contact: Felipe Balbi <felipe.balbi@nokia.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License | |
9 | * version 2 as published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
19 | * 02110-1301 USA | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN | |
24 | * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, | |
25 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
26 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF | |
27 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON | |
28 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
29 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
30 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
31 | * | |
32 | */ | |
33 | ||
34 | #include <linux/module.h> | |
35 | #include <linux/kernel.h> | |
36 | #include <linux/init.h> | |
37 | #include <linux/debugfs.h> | |
38 | #include <linux/seq_file.h> | |
39 | ||
40 | #include <asm/uaccess.h> | |
41 | ||
42 | #include <linux/musb/musb_core.h> | |
43 | #include <linux/musb/musb_debug.h> | |
44 | ||
45 | struct musb_register_map { | |
46 | char *name; | |
47 | unsigned offset; | |
48 | unsigned size; | |
49 | }; | |
50 | ||
51 | static const struct musb_register_map musb_regmap[] = { | |
52 | { "FAddr", 0x00, 8 }, | |
53 | { "Power", 0x01, 8 }, | |
54 | { "Frame", 0x0c, 16 }, | |
55 | { "Index", 0x0e, 8 }, | |
56 | { "Testmode", 0x0f, 8 }, | |
57 | { "TxMaxPp", 0x10, 16 }, | |
58 | { "TxCSRp", 0x12, 16 }, | |
59 | { "RxMaxPp", 0x14, 16 }, | |
60 | { "RxCSR", 0x16, 16 }, | |
61 | { "RxCount", 0x18, 16 }, | |
62 | { "ConfigData", 0x1f, 8 }, | |
63 | { "DevCtl", 0x60, 8 }, | |
64 | { "MISC", 0x61, 8 }, | |
65 | { "TxFIFOsz", 0x62, 8 }, | |
66 | { "RxFIFOsz", 0x63, 8 }, | |
67 | { "TxFIFOadd", 0x64, 16 }, | |
68 | { "RxFIFOadd", 0x66, 16 }, | |
69 | { "VControl", 0x68, 32 }, | |
70 | { "HWVers", 0x6C, 16 }, | |
71 | { "EPInfo", 0x78, 8 }, | |
72 | { "RAMInfo", 0x79, 8 }, | |
73 | { "LinkInfo", 0x7A, 8 }, | |
74 | { "VPLen", 0x7B, 8 }, | |
75 | { "HS_EOF1", 0x7C, 8 }, | |
76 | { "FS_EOF1", 0x7D, 8 }, | |
77 | { "LS_EOF1", 0x7E, 8 }, | |
78 | { "SOFT_RST", 0x7F, 8 }, | |
79 | { "DMA_CNTLch0", 0x204, 16 }, | |
80 | { "DMA_ADDRch0", 0x208, 32 }, | |
81 | { "DMA_COUNTch0", 0x20C, 32 }, | |
82 | { "DMA_CNTLch1", 0x214, 16 }, | |
83 | { "DMA_ADDRch1", 0x218, 32 }, | |
84 | { "DMA_COUNTch1", 0x21C, 32 }, | |
85 | { "DMA_CNTLch2", 0x224, 16 }, | |
86 | { "DMA_ADDRch2", 0x228, 32 }, | |
87 | { "DMA_COUNTch2", 0x22C, 32 }, | |
88 | { "DMA_CNTLch3", 0x234, 16 }, | |
89 | { "DMA_ADDRch3", 0x238, 32 }, | |
90 | { "DMA_COUNTch3", 0x23C, 32 }, | |
91 | { "DMA_CNTLch4", 0x244, 16 }, | |
92 | { "DMA_ADDRch4", 0x248, 32 }, | |
93 | { "DMA_COUNTch4", 0x24C, 32 }, | |
94 | { "DMA_CNTLch5", 0x254, 16 }, | |
95 | { "DMA_ADDRch5", 0x258, 32 }, | |
96 | { "DMA_COUNTch5", 0x25C, 32 }, | |
97 | { "DMA_CNTLch6", 0x264, 16 }, | |
98 | { "DMA_ADDRch6", 0x268, 32 }, | |
99 | { "DMA_COUNTch6", 0x26C, 32 }, | |
100 | { "DMA_CNTLch7", 0x274, 16 }, | |
101 | { "DMA_ADDRch7", 0x278, 32 }, | |
102 | { "DMA_COUNTch7", 0x27C, 32 }, | |
103 | { } /* Terminating Entry */ | |
104 | }; | |
105 | ||
106 | static struct dentry *musb_debugfs_root; | |
107 | ||
108 | static int musb_regdump_show(struct seq_file *s, void *unused) | |
109 | { | |
110 | struct musb *musb = s->private; | |
111 | unsigned i; | |
112 | ||
113 | seq_printf(s, "MUSB (M)HDRC Register Dump\n"); | |
114 | ||
115 | for (i = 0; i < ARRAY_SIZE(musb_regmap); i++) { | |
116 | switch (musb_regmap[i].size) { | |
117 | case 8: | |
118 | seq_printf(s, "%-12s: %02x\n", musb_regmap[i].name, | |
119 | musb_readb(musb->mregs, musb_regmap[i].offset)); | |
120 | break; | |
121 | case 16: | |
122 | seq_printf(s, "%-12s: %04x\n", musb_regmap[i].name, | |
123 | musb_readw(musb->mregs, musb_regmap[i].offset)); | |
124 | break; | |
125 | case 32: | |
126 | seq_printf(s, "%-12s: %08x\n", musb_regmap[i].name, | |
127 | musb_readl(musb->mregs, musb_regmap[i].offset)); | |
128 | break; | |
129 | } | |
130 | } | |
131 | ||
132 | return 0; | |
133 | } | |
134 | ||
135 | static int musb_regdump_open(struct inode *inode, struct file *file) | |
136 | { | |
137 | return single_open(file, musb_regdump_show, inode->i_private); | |
138 | } | |
139 | ||
140 | static int musb_test_mode_show(struct seq_file *s, void *unused) | |
141 | { | |
142 | struct musb *musb = s->private; | |
143 | unsigned test; | |
144 | ||
145 | test = musb_readb(musb->mregs, MUSB_TESTMODE); | |
146 | ||
147 | if (test & MUSB_TEST_FORCE_HOST) | |
148 | seq_printf(s, "force host\n"); | |
149 | ||
150 | if (test & MUSB_TEST_FIFO_ACCESS) | |
151 | seq_printf(s, "fifo access\n"); | |
152 | ||
153 | if (test & MUSB_TEST_FORCE_FS) | |
154 | seq_printf(s, "force full-speed\n"); | |
155 | ||
156 | if (test & MUSB_TEST_FORCE_HS) | |
157 | seq_printf(s, "force high-speed\n"); | |
158 | ||
159 | if (test & MUSB_TEST_PACKET) | |
160 | seq_printf(s, "test packet\n"); | |
161 | ||
162 | if (test & MUSB_TEST_K) | |
163 | seq_printf(s, "test K\n"); | |
164 | ||
165 | if (test & MUSB_TEST_J) | |
166 | seq_printf(s, "test J\n"); | |
167 | ||
168 | if (test & MUSB_TEST_SE0_NAK) | |
169 | seq_printf(s, "test SE0 NAK\n"); | |
170 | ||
171 | return 0; | |
172 | } | |
173 | ||
174 | static const struct file_operations musb_regdump_fops = { | |
175 | .open = musb_regdump_open, | |
176 | .read = seq_read, | |
177 | .llseek = seq_lseek, | |
178 | .release = single_release, | |
179 | }; | |
180 | ||
181 | static int musb_test_mode_open(struct inode *inode, struct file *file) | |
182 | { | |
183 | return single_open(file, musb_test_mode_show, inode->i_private); | |
184 | } | |
185 | ||
186 | static ssize_t musb_test_mode_write(struct file *file, | |
187 | const char __user *ubuf, size_t count, loff_t *ppos) | |
188 | { | |
189 | struct seq_file *s = file->private_data; | |
190 | struct musb *musb = s->private; | |
191 | u8 test = 0; | |
192 | char buf[18]; | |
193 | ||
194 | memset(buf, 0x00, sizeof(buf)); | |
195 | ||
196 | if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) | |
197 | return -EFAULT; | |
198 | ||
199 | if (!strncmp(buf, "force host", 9)) | |
200 | test = MUSB_TEST_FORCE_HOST; | |
201 | ||
202 | if (!strncmp(buf, "fifo access", 11)) | |
203 | test = MUSB_TEST_FIFO_ACCESS; | |
204 | ||
205 | if (!strncmp(buf, "force full-speed", 15)) | |
206 | test = MUSB_TEST_FORCE_FS; | |
207 | ||
208 | if (!strncmp(buf, "force high-speed", 15)) | |
209 | test = MUSB_TEST_FORCE_HS; | |
210 | ||
211 | if (!strncmp(buf, "test packet", 10)) { | |
212 | test = MUSB_TEST_PACKET; | |
213 | musb_load_testpacket(musb); | |
214 | } | |
215 | ||
216 | if (!strncmp(buf, "test K", 6)) | |
217 | test = MUSB_TEST_K; | |
218 | ||
219 | if (!strncmp(buf, "test J", 6)) | |
220 | test = MUSB_TEST_J; | |
221 | ||
222 | if (!strncmp(buf, "test SE0 NAK", 12)) | |
223 | test = MUSB_TEST_SE0_NAK; | |
224 | ||
225 | musb_writeb(musb->mregs, MUSB_TESTMODE, test); | |
226 | ||
227 | return count; | |
228 | } | |
229 | ||
230 | static const struct file_operations musb_test_mode_fops = { | |
231 | .open = musb_test_mode_open, | |
232 | .write = musb_test_mode_write, | |
233 | .read = seq_read, | |
234 | .llseek = seq_lseek, | |
235 | .release = single_release, | |
236 | }; | |
237 | ||
238 | int musb_init_debugfs(struct musb *musb) | |
239 | { | |
240 | struct dentry *root; | |
241 | struct dentry *file; | |
242 | int ret; | |
243 | ||
244 | root = debugfs_create_dir("musb", NULL); | |
245 | if (!root) { | |
246 | ret = -ENOMEM; | |
247 | goto err0; | |
248 | } | |
249 | ||
250 | file = debugfs_create_file("regdump", S_IRUGO, root, musb, | |
251 | &musb_regdump_fops); | |
252 | if (!file) { | |
253 | ret = -ENOMEM; | |
254 | goto err1; | |
255 | } | |
256 | ||
257 | file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, | |
258 | root, musb, &musb_test_mode_fops); | |
259 | if (!file) { | |
260 | ret = -ENOMEM; | |
261 | goto err1; | |
262 | } | |
263 | ||
264 | musb_debugfs_root = root; | |
265 | ||
266 | return 0; | |
267 | ||
268 | err1: | |
269 | debugfs_remove_recursive(root); | |
270 | ||
271 | err0: | |
272 | return ret; | |
273 | } | |
274 | ||
275 | void /* __init_or_exit */ musb_exit_debugfs(struct musb *musb) | |
276 | { | |
277 | debugfs_remove_recursive(musb_debugfs_root); | |
278 | } |