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7f7f9e2a FB |
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> | |
7f7f9e2a | 36 | #include <linux/init.h> |
7f7f9e2a FB |
37 | #include <linux/debugfs.h> |
38 | #include <linux/seq_file.h> | |
39 | ||
7c0f6ba6 | 40 | #include <linux/uaccess.h> |
7f7f9e2a FB |
41 | |
42 | #include "musb_core.h" | |
43 | #include "musb_debug.h" | |
44 | ||
7f7f9e2a FB |
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[] = { | |
c2365ce5 RB |
52 | { "FAddr", MUSB_FADDR, 8 }, |
53 | { "Power", MUSB_POWER, 8 }, | |
54 | { "Frame", MUSB_FRAME, 16 }, | |
55 | { "Index", MUSB_INDEX, 8 }, | |
56 | { "Testmode", MUSB_TESTMODE, 8 }, | |
57 | { "TxMaxPp", MUSB_TXMAXP, 16 }, | |
58 | { "TxCSRp", MUSB_TXCSR, 16 }, | |
59 | { "RxMaxPp", MUSB_RXMAXP, 16 }, | |
60 | { "RxCSR", MUSB_RXCSR, 16 }, | |
61 | { "RxCount", MUSB_RXCOUNT, 16 }, | |
c2365ce5 RB |
62 | { "IntrRxE", MUSB_INTRRXE, 16 }, |
63 | { "IntrTxE", MUSB_INTRTXE, 16 }, | |
64 | { "IntrUsbE", MUSB_INTRUSBE, 8 }, | |
65 | { "DevCtl", MUSB_DEVCTL, 8 }, | |
c2365ce5 RB |
66 | { "VControl", 0x68, 32 }, |
67 | { "HWVers", 0x69, 16 }, | |
c2365ce5 RB |
68 | { "LinkInfo", MUSB_LINKINFO, 8 }, |
69 | { "VPLen", MUSB_VPLEN, 8 }, | |
70 | { "HS_EOF1", MUSB_HS_EOF1, 8 }, | |
71 | { "FS_EOF1", MUSB_FS_EOF1, 8 }, | |
72 | { "LS_EOF1", MUSB_LS_EOF1, 8 }, | |
73 | { "SOFT_RST", 0x7F, 8 }, | |
7f7f9e2a | 74 | { "DMA_CNTLch0", 0x204, 16 }, |
0936fb5e AG |
75 | { "DMA_ADDRch0", 0x208, 32 }, |
76 | { "DMA_COUNTch0", 0x20C, 32 }, | |
7f7f9e2a | 77 | { "DMA_CNTLch1", 0x214, 16 }, |
0936fb5e AG |
78 | { "DMA_ADDRch1", 0x218, 32 }, |
79 | { "DMA_COUNTch1", 0x21C, 32 }, | |
7f7f9e2a | 80 | { "DMA_CNTLch2", 0x224, 16 }, |
0936fb5e AG |
81 | { "DMA_ADDRch2", 0x228, 32 }, |
82 | { "DMA_COUNTch2", 0x22C, 32 }, | |
7f7f9e2a | 83 | { "DMA_CNTLch3", 0x234, 16 }, |
0936fb5e AG |
84 | { "DMA_ADDRch3", 0x238, 32 }, |
85 | { "DMA_COUNTch3", 0x23C, 32 }, | |
7f7f9e2a | 86 | { "DMA_CNTLch4", 0x244, 16 }, |
0936fb5e AG |
87 | { "DMA_ADDRch4", 0x248, 32 }, |
88 | { "DMA_COUNTch4", 0x24C, 32 }, | |
7f7f9e2a | 89 | { "DMA_CNTLch5", 0x254, 16 }, |
0936fb5e AG |
90 | { "DMA_ADDRch5", 0x258, 32 }, |
91 | { "DMA_COUNTch5", 0x25C, 32 }, | |
7f7f9e2a | 92 | { "DMA_CNTLch6", 0x264, 16 }, |
0936fb5e AG |
93 | { "DMA_ADDRch6", 0x268, 32 }, |
94 | { "DMA_COUNTch6", 0x26C, 32 }, | |
7f7f9e2a | 95 | { "DMA_CNTLch7", 0x274, 16 }, |
0936fb5e AG |
96 | { "DMA_ADDRch7", 0x278, 32 }, |
97 | { "DMA_COUNTch7", 0x27C, 32 }, | |
449a7e99 FB |
98 | #ifndef CONFIG_BLACKFIN |
99 | { "ConfigData", MUSB_CONFIGDATA,8 }, | |
100 | { "BabbleCtl", MUSB_BABBLE_CTL,8 }, | |
101 | { "TxFIFOsz", MUSB_TXFIFOSZ, 8 }, | |
102 | { "RxFIFOsz", MUSB_RXFIFOSZ, 8 }, | |
103 | { "TxFIFOadd", MUSB_TXFIFOADD, 16 }, | |
104 | { "RxFIFOadd", MUSB_RXFIFOADD, 16 }, | |
105 | { "EPInfo", MUSB_EPINFO, 8 }, | |
106 | { "RAMInfo", MUSB_RAMINFO, 8 }, | |
107 | #endif | |
7f7f9e2a FB |
108 | { } /* Terminating Entry */ |
109 | }; | |
110 | ||
7f7f9e2a FB |
111 | static int musb_regdump_show(struct seq_file *s, void *unused) |
112 | { | |
113 | struct musb *musb = s->private; | |
114 | unsigned i; | |
115 | ||
116 | seq_printf(s, "MUSB (M)HDRC Register Dump\n"); | |
117 | ||
118 | for (i = 0; i < ARRAY_SIZE(musb_regmap); i++) { | |
119 | switch (musb_regmap[i].size) { | |
120 | case 8: | |
121 | seq_printf(s, "%-12s: %02x\n", musb_regmap[i].name, | |
122 | musb_readb(musb->mregs, musb_regmap[i].offset)); | |
123 | break; | |
124 | case 16: | |
125 | seq_printf(s, "%-12s: %04x\n", musb_regmap[i].name, | |
126 | musb_readw(musb->mregs, musb_regmap[i].offset)); | |
127 | break; | |
128 | case 32: | |
129 | seq_printf(s, "%-12s: %08x\n", musb_regmap[i].name, | |
130 | musb_readl(musb->mregs, musb_regmap[i].offset)); | |
131 | break; | |
132 | } | |
133 | } | |
134 | ||
135 | return 0; | |
136 | } | |
137 | ||
138 | static int musb_regdump_open(struct inode *inode, struct file *file) | |
139 | { | |
140 | return single_open(file, musb_regdump_show, inode->i_private); | |
141 | } | |
142 | ||
143 | static int musb_test_mode_show(struct seq_file *s, void *unused) | |
144 | { | |
145 | struct musb *musb = s->private; | |
146 | unsigned test; | |
147 | ||
148 | test = musb_readb(musb->mregs, MUSB_TESTMODE); | |
149 | ||
150 | if (test & MUSB_TEST_FORCE_HOST) | |
151 | seq_printf(s, "force host\n"); | |
152 | ||
153 | if (test & MUSB_TEST_FIFO_ACCESS) | |
154 | seq_printf(s, "fifo access\n"); | |
155 | ||
156 | if (test & MUSB_TEST_FORCE_FS) | |
157 | seq_printf(s, "force full-speed\n"); | |
158 | ||
159 | if (test & MUSB_TEST_FORCE_HS) | |
160 | seq_printf(s, "force high-speed\n"); | |
161 | ||
162 | if (test & MUSB_TEST_PACKET) | |
163 | seq_printf(s, "test packet\n"); | |
164 | ||
165 | if (test & MUSB_TEST_K) | |
166 | seq_printf(s, "test K\n"); | |
167 | ||
168 | if (test & MUSB_TEST_J) | |
169 | seq_printf(s, "test J\n"); | |
170 | ||
171 | if (test & MUSB_TEST_SE0_NAK) | |
172 | seq_printf(s, "test SE0 NAK\n"); | |
173 | ||
174 | return 0; | |
175 | } | |
176 | ||
177 | static const struct file_operations musb_regdump_fops = { | |
178 | .open = musb_regdump_open, | |
179 | .read = seq_read, | |
180 | .llseek = seq_lseek, | |
181 | .release = single_release, | |
182 | }; | |
183 | ||
184 | static int musb_test_mode_open(struct inode *inode, struct file *file) | |
185 | { | |
7f7f9e2a FB |
186 | return single_open(file, musb_test_mode_show, inode->i_private); |
187 | } | |
188 | ||
189 | static ssize_t musb_test_mode_write(struct file *file, | |
190 | const char __user *ubuf, size_t count, loff_t *ppos) | |
191 | { | |
024cfa59 MN |
192 | struct seq_file *s = file->private_data; |
193 | struct musb *musb = s->private; | |
205845ef | 194 | u8 test; |
7f7f9e2a FB |
195 | char buf[18]; |
196 | ||
205845ef BL |
197 | test = musb_readb(musb->mregs, MUSB_TESTMODE); |
198 | if (test) { | |
199 | dev_err(musb->controller, "Error: test mode is already set. " | |
200 | "Please do USB Bus Reset to start a new test.\n"); | |
201 | return count; | |
202 | } | |
203 | ||
7f7f9e2a FB |
204 | memset(buf, 0x00, sizeof(buf)); |
205 | ||
fe198e34 | 206 | if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) |
7f7f9e2a FB |
207 | return -EFAULT; |
208 | ||
e87c3f80 | 209 | if (strstarts(buf, "force host")) |
7f7f9e2a FB |
210 | test = MUSB_TEST_FORCE_HOST; |
211 | ||
e87c3f80 | 212 | if (strstarts(buf, "fifo access")) |
7f7f9e2a FB |
213 | test = MUSB_TEST_FIFO_ACCESS; |
214 | ||
e87c3f80 | 215 | if (strstarts(buf, "force full-speed")) |
7f7f9e2a FB |
216 | test = MUSB_TEST_FORCE_FS; |
217 | ||
e87c3f80 | 218 | if (strstarts(buf, "force high-speed")) |
7f7f9e2a FB |
219 | test = MUSB_TEST_FORCE_HS; |
220 | ||
e87c3f80 | 221 | if (strstarts(buf, "test packet")) { |
7f7f9e2a FB |
222 | test = MUSB_TEST_PACKET; |
223 | musb_load_testpacket(musb); | |
224 | } | |
225 | ||
e87c3f80 | 226 | if (strstarts(buf, "test K")) |
7f7f9e2a FB |
227 | test = MUSB_TEST_K; |
228 | ||
e87c3f80 | 229 | if (strstarts(buf, "test J")) |
7f7f9e2a FB |
230 | test = MUSB_TEST_J; |
231 | ||
e87c3f80 | 232 | if (strstarts(buf, "test SE0 NAK")) |
7f7f9e2a FB |
233 | test = MUSB_TEST_SE0_NAK; |
234 | ||
235 | musb_writeb(musb->mregs, MUSB_TESTMODE, test); | |
236 | ||
237 | return count; | |
238 | } | |
239 | ||
240 | static const struct file_operations musb_test_mode_fops = { | |
241 | .open = musb_test_mode_open, | |
242 | .write = musb_test_mode_write, | |
243 | .read = seq_read, | |
244 | .llseek = seq_lseek, | |
245 | .release = single_release, | |
246 | }; | |
247 | ||
ffc1d299 BL |
248 | static int musb_softconnect_show(struct seq_file *s, void *unused) |
249 | { | |
250 | struct musb *musb = s->private; | |
251 | u8 reg; | |
252 | int connect; | |
253 | ||
254 | switch (musb->xceiv->otg->state) { | |
255 | case OTG_STATE_A_HOST: | |
256 | case OTG_STATE_A_WAIT_BCON: | |
257 | reg = musb_readb(musb->mregs, MUSB_DEVCTL); | |
258 | connect = reg & MUSB_DEVCTL_SESSION ? 1 : 0; | |
259 | break; | |
260 | default: | |
261 | connect = -1; | |
262 | } | |
263 | ||
264 | seq_printf(s, "%d\n", connect); | |
265 | ||
266 | return 0; | |
267 | } | |
268 | ||
269 | static int musb_softconnect_open(struct inode *inode, struct file *file) | |
270 | { | |
271 | return single_open(file, musb_softconnect_show, inode->i_private); | |
272 | } | |
273 | ||
274 | static ssize_t musb_softconnect_write(struct file *file, | |
275 | const char __user *ubuf, size_t count, loff_t *ppos) | |
276 | { | |
277 | struct seq_file *s = file->private_data; | |
278 | struct musb *musb = s->private; | |
279 | char buf[2]; | |
280 | u8 reg; | |
281 | ||
282 | memset(buf, 0x00, sizeof(buf)); | |
283 | ||
284 | if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) | |
285 | return -EFAULT; | |
286 | ||
287 | if (!strncmp(buf, "0", 1)) { | |
288 | switch (musb->xceiv->otg->state) { | |
289 | case OTG_STATE_A_HOST: | |
290 | musb_root_disconnect(musb); | |
291 | reg = musb_readb(musb->mregs, MUSB_DEVCTL); | |
292 | reg &= ~MUSB_DEVCTL_SESSION; | |
293 | musb_writeb(musb->mregs, MUSB_DEVCTL, reg); | |
294 | break; | |
295 | default: | |
296 | break; | |
297 | } | |
298 | } else if (!strncmp(buf, "1", 1)) { | |
299 | switch (musb->xceiv->otg->state) { | |
300 | case OTG_STATE_A_WAIT_BCON: | |
301 | /* | |
302 | * musb_save_context() called in musb_runtime_suspend() | |
303 | * might cache devctl with SESSION bit cleared during | |
304 | * soft-disconnect, so specifically set SESSION bit | |
305 | * here to preserve it for musb_runtime_resume(). | |
306 | */ | |
307 | musb->context.devctl |= MUSB_DEVCTL_SESSION; | |
308 | reg = musb_readb(musb->mregs, MUSB_DEVCTL); | |
309 | reg |= MUSB_DEVCTL_SESSION; | |
310 | musb_writeb(musb->mregs, MUSB_DEVCTL, reg); | |
311 | break; | |
312 | default: | |
313 | break; | |
314 | } | |
315 | } | |
316 | ||
317 | return count; | |
318 | } | |
319 | ||
320 | /* | |
321 | * In host mode, connect/disconnect the bus without physically | |
322 | * remove the devices. | |
323 | */ | |
324 | static const struct file_operations musb_softconnect_fops = { | |
325 | .open = musb_softconnect_open, | |
326 | .write = musb_softconnect_write, | |
327 | .read = seq_read, | |
328 | .llseek = seq_lseek, | |
329 | .release = single_release, | |
330 | }; | |
331 | ||
41ac7b3a | 332 | int musb_init_debugfs(struct musb *musb) |
7f7f9e2a FB |
333 | { |
334 | struct dentry *root; | |
335 | struct dentry *file; | |
336 | int ret; | |
337 | ||
8d2421e6 | 338 | root = debugfs_create_dir(dev_name(musb->controller), NULL); |
6c2abcdd FB |
339 | if (!root) { |
340 | ret = -ENOMEM; | |
7f7f9e2a FB |
341 | goto err0; |
342 | } | |
343 | ||
344 | file = debugfs_create_file("regdump", S_IRUGO, root, musb, | |
345 | &musb_regdump_fops); | |
6c2abcdd FB |
346 | if (!file) { |
347 | ret = -ENOMEM; | |
7f7f9e2a FB |
348 | goto err1; |
349 | } | |
350 | ||
351 | file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, | |
352 | root, musb, &musb_test_mode_fops); | |
6c2abcdd FB |
353 | if (!file) { |
354 | ret = -ENOMEM; | |
7f7f9e2a FB |
355 | goto err1; |
356 | } | |
357 | ||
ffc1d299 BL |
358 | file = debugfs_create_file("softconnect", S_IRUGO | S_IWUSR, |
359 | root, musb, &musb_softconnect_fops); | |
360 | if (!file) { | |
361 | ret = -ENOMEM; | |
362 | goto err1; | |
363 | } | |
364 | ||
8d2421e6 | 365 | musb->debugfs_root = root; |
7f7f9e2a FB |
366 | |
367 | return 0; | |
368 | ||
369 | err1: | |
370 | debugfs_remove_recursive(root); | |
371 | ||
372 | err0: | |
373 | return ret; | |
374 | } | |
375 | ||
b0f9da7e | 376 | void /* __init_or_exit */ musb_exit_debugfs(struct musb *musb) |
7f7f9e2a | 377 | { |
8d2421e6 | 378 | debugfs_remove_recursive(musb->debugfs_root); |
7f7f9e2a | 379 | } |