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1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2001-2002 by David Brownell | |
53bd6a60 | 3 | * |
1da177e4 LT |
4 | * This program is free software; you can redistribute it and/or modify it |
5 | * under the terms of the GNU General Public License as published by the | |
6 | * Free Software Foundation; either version 2 of the License, or (at your | |
7 | * option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
11 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 | * for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software Foundation, | |
16 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
17 | */ | |
18 | ||
19 | /* this file is part of ehci-hcd.c */ | |
20 | ||
21 | #define ehci_dbg(ehci, fmt, args...) \ | |
22 | dev_dbg (ehci_to_hcd(ehci)->self.controller , fmt , ## args ) | |
23 | #define ehci_err(ehci, fmt, args...) \ | |
24 | dev_err (ehci_to_hcd(ehci)->self.controller , fmt , ## args ) | |
25 | #define ehci_info(ehci, fmt, args...) \ | |
26 | dev_info (ehci_to_hcd(ehci)->self.controller , fmt , ## args ) | |
27 | #define ehci_warn(ehci, fmt, args...) \ | |
28 | dev_warn (ehci_to_hcd(ehci)->self.controller , fmt , ## args ) | |
29 | ||
9776afc8 | 30 | #ifdef VERBOSE_DEBUG |
1da177e4 LT |
31 | # define vdbg dbg |
32 | # define ehci_vdbg ehci_dbg | |
33 | #else | |
34 | # define vdbg(fmt,args...) do { } while (0) | |
35 | # define ehci_vdbg(ehci, fmt, args...) do { } while (0) | |
36 | #endif | |
37 | ||
38 | #ifdef DEBUG | |
39 | ||
40 | /* check the values in the HCSPARAMS register | |
41 | * (host controller _Structural_ parameters) | |
42 | * see EHCI spec, Table 2-4 for each value | |
43 | */ | |
44 | static void dbg_hcs_params (struct ehci_hcd *ehci, char *label) | |
45 | { | |
083522d7 | 46 | u32 params = ehci_readl(ehci, &ehci->caps->hcs_params); |
1da177e4 LT |
47 | |
48 | ehci_dbg (ehci, | |
49 | "%s hcs_params 0x%x dbg=%d%s cc=%d pcc=%d%s%s ports=%d\n", | |
50 | label, params, | |
51 | HCS_DEBUG_PORT (params), | |
52 | HCS_INDICATOR (params) ? " ind" : "", | |
53 | HCS_N_CC (params), | |
54 | HCS_N_PCC (params), | |
6dbd682b | 55 | HCS_PORTROUTED (params) ? "" : " ordered", |
1da177e4 LT |
56 | HCS_PPC (params) ? "" : " !ppc", |
57 | HCS_N_PORTS (params) | |
58 | ); | |
59 | /* Port routing, per EHCI 0.95 Spec, Section 2.2.5 */ | |
60 | if (HCS_PORTROUTED (params)) { | |
61 | int i; | |
62 | char buf [46], tmp [7], byte; | |
63 | ||
64 | buf[0] = 0; | |
65 | for (i = 0; i < HCS_N_PORTS (params); i++) { | |
66 | // FIXME MIPS won't readb() ... | |
67 | byte = readb (&ehci->caps->portroute[(i>>1)]); | |
53bd6a60 | 68 | sprintf(tmp, "%d ", |
1da177e4 LT |
69 | ((i & 0x1) ? ((byte)&0xf) : ((byte>>4)&0xf))); |
70 | strcat(buf, tmp); | |
71 | } | |
72 | ehci_dbg (ehci, "%s portroute %s\n", | |
73 | label, buf); | |
74 | } | |
75 | } | |
76 | #else | |
77 | ||
78 | static inline void dbg_hcs_params (struct ehci_hcd *ehci, char *label) {} | |
79 | ||
80 | #endif | |
81 | ||
82 | #ifdef DEBUG | |
83 | ||
84 | /* check the values in the HCCPARAMS register | |
85 | * (host controller _Capability_ parameters) | |
86 | * see EHCI Spec, Table 2-5 for each value | |
87 | * */ | |
88 | static void dbg_hcc_params (struct ehci_hcd *ehci, char *label) | |
89 | { | |
083522d7 | 90 | u32 params = ehci_readl(ehci, &ehci->caps->hcc_params); |
1da177e4 LT |
91 | |
92 | if (HCC_ISOC_CACHE (params)) { | |
93 | ehci_dbg (ehci, | |
6dbd682b SR |
94 | "%s hcc_params %04x caching frame %s%s%s\n", |
95 | label, params, | |
96 | HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024", | |
97 | HCC_CANPARK(params) ? " park" : "", | |
98 | HCC_64BIT_ADDR(params) ? " 64 bit addr" : ""); | |
1da177e4 LT |
99 | } else { |
100 | ehci_dbg (ehci, | |
aa4d8342 | 101 | "%s hcc_params %04x thresh %d uframes %s%s%s%s%s%s%s\n", |
6dbd682b SR |
102 | label, |
103 | params, | |
104 | HCC_ISOC_THRES(params), | |
105 | HCC_PGM_FRAMELISTLEN(params) ? "256/512/1024" : "1024", | |
106 | HCC_CANPARK(params) ? " park" : "", | |
aa4d8342 AD |
107 | HCC_64BIT_ADDR(params) ? " 64 bit addr" : "", |
108 | HCC_LPM(params) ? " LPM" : "", | |
109 | HCC_PER_PORT_CHANGE_EVENT(params) ? " ppce" : "", | |
110 | HCC_HW_PREFETCH(params) ? " hw prefetch" : "", | |
111 | HCC_32FRAME_PERIODIC_LIST(params) ? | |
112 | " 32 peridic list" : ""); | |
1da177e4 LT |
113 | } |
114 | } | |
115 | #else | |
116 | ||
117 | static inline void dbg_hcc_params (struct ehci_hcd *ehci, char *label) {} | |
118 | ||
119 | #endif | |
120 | ||
121 | #ifdef DEBUG | |
122 | ||
8234509c | 123 | static void __maybe_unused |
1da177e4 LT |
124 | dbg_qtd (const char *label, struct ehci_hcd *ehci, struct ehci_qtd *qtd) |
125 | { | |
6dbd682b SR |
126 | ehci_dbg(ehci, "%s td %p n%08x %08x t%08x p0=%08x\n", label, qtd, |
127 | hc32_to_cpup(ehci, &qtd->hw_next), | |
128 | hc32_to_cpup(ehci, &qtd->hw_alt_next), | |
129 | hc32_to_cpup(ehci, &qtd->hw_token), | |
130 | hc32_to_cpup(ehci, &qtd->hw_buf [0])); | |
1da177e4 | 131 | if (qtd->hw_buf [1]) |
6dbd682b SR |
132 | ehci_dbg(ehci, " p1=%08x p2=%08x p3=%08x p4=%08x\n", |
133 | hc32_to_cpup(ehci, &qtd->hw_buf[1]), | |
134 | hc32_to_cpup(ehci, &qtd->hw_buf[2]), | |
135 | hc32_to_cpup(ehci, &qtd->hw_buf[3]), | |
136 | hc32_to_cpup(ehci, &qtd->hw_buf[4])); | |
1da177e4 LT |
137 | } |
138 | ||
8234509c | 139 | static void __maybe_unused |
1da177e4 LT |
140 | dbg_qh (const char *label, struct ehci_hcd *ehci, struct ehci_qh *qh) |
141 | { | |
3807e26d AD |
142 | struct ehci_qh_hw *hw = qh->hw; |
143 | ||
1da177e4 | 144 | ehci_dbg (ehci, "%s qh %p n%08x info %x %x qtd %x\n", label, |
3807e26d AD |
145 | qh, hw->hw_next, hw->hw_info1, hw->hw_info2, hw->hw_current); |
146 | dbg_qtd("overlay", ehci, (struct ehci_qtd *) &hw->hw_qtd_next); | |
1da177e4 LT |
147 | } |
148 | ||
8234509c | 149 | static void __maybe_unused |
53bd6a60 | 150 | dbg_itd (const char *label, struct ehci_hcd *ehci, struct ehci_itd *itd) |
1da177e4 LT |
151 | { |
152 | ehci_dbg (ehci, "%s [%d] itd %p, next %08x, urb %p\n", | |
6dbd682b SR |
153 | label, itd->frame, itd, hc32_to_cpu(ehci, itd->hw_next), |
154 | itd->urb); | |
1da177e4 | 155 | ehci_dbg (ehci, |
53bd6a60 | 156 | " trans: %08x %08x %08x %08x %08x %08x %08x %08x\n", |
6dbd682b SR |
157 | hc32_to_cpu(ehci, itd->hw_transaction[0]), |
158 | hc32_to_cpu(ehci, itd->hw_transaction[1]), | |
159 | hc32_to_cpu(ehci, itd->hw_transaction[2]), | |
160 | hc32_to_cpu(ehci, itd->hw_transaction[3]), | |
161 | hc32_to_cpu(ehci, itd->hw_transaction[4]), | |
162 | hc32_to_cpu(ehci, itd->hw_transaction[5]), | |
163 | hc32_to_cpu(ehci, itd->hw_transaction[6]), | |
164 | hc32_to_cpu(ehci, itd->hw_transaction[7])); | |
1da177e4 | 165 | ehci_dbg (ehci, |
53bd6a60 | 166 | " buf: %08x %08x %08x %08x %08x %08x %08x\n", |
6dbd682b SR |
167 | hc32_to_cpu(ehci, itd->hw_bufp[0]), |
168 | hc32_to_cpu(ehci, itd->hw_bufp[1]), | |
169 | hc32_to_cpu(ehci, itd->hw_bufp[2]), | |
170 | hc32_to_cpu(ehci, itd->hw_bufp[3]), | |
171 | hc32_to_cpu(ehci, itd->hw_bufp[4]), | |
172 | hc32_to_cpu(ehci, itd->hw_bufp[5]), | |
173 | hc32_to_cpu(ehci, itd->hw_bufp[6])); | |
1da177e4 LT |
174 | ehci_dbg (ehci, " index: %d %d %d %d %d %d %d %d\n", |
175 | itd->index[0], itd->index[1], itd->index[2], | |
176 | itd->index[3], itd->index[4], itd->index[5], | |
177 | itd->index[6], itd->index[7]); | |
178 | } | |
179 | ||
8234509c | 180 | static void __maybe_unused |
53bd6a60 | 181 | dbg_sitd (const char *label, struct ehci_hcd *ehci, struct ehci_sitd *sitd) |
1da177e4 LT |
182 | { |
183 | ehci_dbg (ehci, "%s [%d] sitd %p, next %08x, urb %p\n", | |
6dbd682b SR |
184 | label, sitd->frame, sitd, hc32_to_cpu(ehci, sitd->hw_next), |
185 | sitd->urb); | |
1da177e4 | 186 | ehci_dbg (ehci, |
53bd6a60 | 187 | " addr %08x sched %04x result %08x buf %08x %08x\n", |
6dbd682b SR |
188 | hc32_to_cpu(ehci, sitd->hw_fullspeed_ep), |
189 | hc32_to_cpu(ehci, sitd->hw_uframe), | |
190 | hc32_to_cpu(ehci, sitd->hw_results), | |
191 | hc32_to_cpu(ehci, sitd->hw_buf[0]), | |
192 | hc32_to_cpu(ehci, sitd->hw_buf[1])); | |
1da177e4 LT |
193 | } |
194 | ||
8234509c | 195 | static int __maybe_unused |
1da177e4 LT |
196 | dbg_status_buf (char *buf, unsigned len, const char *label, u32 status) |
197 | { | |
198 | return scnprintf (buf, len, | |
aa4d8342 | 199 | "%s%sstatus %04x%s%s%s%s%s%s%s%s%s%s%s", |
1da177e4 | 200 | label, label [0] ? " " : "", status, |
aa4d8342 | 201 | (status & STS_PPCE_MASK) ? " PPCE" : "", |
1da177e4 LT |
202 | (status & STS_ASS) ? " Async" : "", |
203 | (status & STS_PSS) ? " Periodic" : "", | |
204 | (status & STS_RECL) ? " Recl" : "", | |
205 | (status & STS_HALT) ? " Halt" : "", | |
206 | (status & STS_IAA) ? " IAA" : "", | |
207 | (status & STS_FATAL) ? " FATAL" : "", | |
208 | (status & STS_FLR) ? " FLR" : "", | |
209 | (status & STS_PCD) ? " PCD" : "", | |
210 | (status & STS_ERR) ? " ERR" : "", | |
211 | (status & STS_INT) ? " INT" : "" | |
212 | ); | |
213 | } | |
214 | ||
8234509c | 215 | static int __maybe_unused |
1da177e4 LT |
216 | dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable) |
217 | { | |
218 | return scnprintf (buf, len, | |
aa4d8342 | 219 | "%s%sintrenable %02x%s%s%s%s%s%s%s", |
1da177e4 | 220 | label, label [0] ? " " : "", enable, |
aa4d8342 | 221 | (enable & STS_PPCE_MASK) ? " PPCE" : "", |
1da177e4 LT |
222 | (enable & STS_IAA) ? " IAA" : "", |
223 | (enable & STS_FATAL) ? " FATAL" : "", | |
224 | (enable & STS_FLR) ? " FLR" : "", | |
225 | (enable & STS_PCD) ? " PCD" : "", | |
226 | (enable & STS_ERR) ? " ERR" : "", | |
227 | (enable & STS_INT) ? " INT" : "" | |
228 | ); | |
229 | } | |
230 | ||
231 | static const char *const fls_strings [] = | |
232 | { "1024", "512", "256", "??" }; | |
233 | ||
234 | static int | |
235 | dbg_command_buf (char *buf, unsigned len, const char *label, u32 command) | |
236 | { | |
237 | return scnprintf (buf, len, | |
aa4d8342 AD |
238 | "%s%scommand %07x %s%s%s%s%s%s=%d ithresh=%d%s%s%s%s " |
239 | "period=%s%s %s", | |
1da177e4 | 240 | label, label [0] ? " " : "", command, |
aa4d8342 AD |
241 | (command & CMD_HIRD) ? " HIRD" : "", |
242 | (command & CMD_PPCEE) ? " PPCEE" : "", | |
243 | (command & CMD_FSP) ? " FSP" : "", | |
244 | (command & CMD_ASPE) ? " ASPE" : "", | |
245 | (command & CMD_PSPE) ? " PSPE" : "", | |
246 | (command & CMD_PARK) ? " park" : "(park)", | |
1da177e4 LT |
247 | CMD_PARK_CNT (command), |
248 | (command >> 16) & 0x3f, | |
249 | (command & CMD_LRESET) ? " LReset" : "", | |
250 | (command & CMD_IAAD) ? " IAAD" : "", | |
251 | (command & CMD_ASE) ? " Async" : "", | |
252 | (command & CMD_PSE) ? " Periodic" : "", | |
253 | fls_strings [(command >> 2) & 0x3], | |
254 | (command & CMD_RESET) ? " Reset" : "", | |
255 | (command & CMD_RUN) ? "RUN" : "HALT" | |
256 | ); | |
257 | } | |
258 | ||
259 | static int | |
260 | dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status) | |
261 | { | |
262 | char *sig; | |
263 | ||
264 | /* signaling state */ | |
265 | switch (status & (3 << 10)) { | |
266 | case 0 << 10: sig = "se0"; break; | |
267 | case 1 << 10: sig = "k"; break; /* low speed */ | |
268 | case 2 << 10: sig = "j"; break; | |
269 | default: sig = "?"; break; | |
270 | } | |
271 | ||
272 | return scnprintf (buf, len, | |
aa4d8342 AD |
273 | "%s%sport:%d status %06x %d %s%s%s%s%s%s " |
274 | "sig=%s%s%s%s%s%s%s%s%s%s%s", | |
1da177e4 | 275 | label, label [0] ? " " : "", port, status, |
aa4d8342 AD |
276 | status>>25,/*device address */ |
277 | (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_ACK ? | |
278 | " ACK" : "", | |
279 | (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_NYET ? | |
280 | " NYET" : "", | |
281 | (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_STALL ? | |
282 | " STALL" : "", | |
283 | (status & PORT_SSTS)>>23 == PORTSC_SUSPEND_STS_ERR ? | |
284 | " ERR" : "", | |
1da177e4 LT |
285 | (status & PORT_POWER) ? " POWER" : "", |
286 | (status & PORT_OWNER) ? " OWNER" : "", | |
287 | sig, | |
aa4d8342 | 288 | (status & PORT_LPM) ? " LPM" : "", |
1da177e4 LT |
289 | (status & PORT_RESET) ? " RESET" : "", |
290 | (status & PORT_SUSPEND) ? " SUSPEND" : "", | |
291 | (status & PORT_RESUME) ? " RESUME" : "", | |
292 | (status & PORT_OCC) ? " OCC" : "", | |
293 | (status & PORT_OC) ? " OC" : "", | |
294 | (status & PORT_PEC) ? " PEC" : "", | |
295 | (status & PORT_PE) ? " PE" : "", | |
296 | (status & PORT_CSC) ? " CSC" : "", | |
6dbd682b | 297 | (status & PORT_CONNECT) ? " CONNECT" : ""); |
1da177e4 LT |
298 | } |
299 | ||
300 | #else | |
8234509c | 301 | static inline void __maybe_unused |
1da177e4 LT |
302 | dbg_qh (char *label, struct ehci_hcd *ehci, struct ehci_qh *qh) |
303 | {} | |
304 | ||
8234509c | 305 | static inline int __maybe_unused |
1da177e4 LT |
306 | dbg_status_buf (char *buf, unsigned len, const char *label, u32 status) |
307 | { return 0; } | |
308 | ||
8234509c | 309 | static inline int __maybe_unused |
1da177e4 LT |
310 | dbg_command_buf (char *buf, unsigned len, const char *label, u32 command) |
311 | { return 0; } | |
312 | ||
8234509c | 313 | static inline int __maybe_unused |
1da177e4 LT |
314 | dbg_intr_buf (char *buf, unsigned len, const char *label, u32 enable) |
315 | { return 0; } | |
316 | ||
8234509c | 317 | static inline int __maybe_unused |
1da177e4 LT |
318 | dbg_port_buf (char *buf, unsigned len, const char *label, int port, u32 status) |
319 | { return 0; } | |
320 | ||
321 | #endif /* DEBUG */ | |
322 | ||
323 | /* functions have the "wrong" filename when they're output... */ | |
324 | #define dbg_status(ehci, label, status) { \ | |
325 | char _buf [80]; \ | |
326 | dbg_status_buf (_buf, sizeof _buf, label, status); \ | |
327 | ehci_dbg (ehci, "%s\n", _buf); \ | |
328 | } | |
329 | ||
330 | #define dbg_cmd(ehci, label, command) { \ | |
331 | char _buf [80]; \ | |
332 | dbg_command_buf (_buf, sizeof _buf, label, command); \ | |
333 | ehci_dbg (ehci, "%s\n", _buf); \ | |
334 | } | |
335 | ||
336 | #define dbg_port(ehci, label, port, status) { \ | |
337 | char _buf [80]; \ | |
338 | dbg_port_buf (_buf, sizeof _buf, label, port, status); \ | |
339 | ehci_dbg (ehci, "%s\n", _buf); \ | |
340 | } | |
341 | ||
342 | /*-------------------------------------------------------------------------*/ | |
343 | ||
344 | #ifdef STUB_DEBUG_FILES | |
345 | ||
346 | static inline void create_debug_files (struct ehci_hcd *bus) { } | |
347 | static inline void remove_debug_files (struct ehci_hcd *bus) { } | |
348 | ||
349 | #else | |
350 | ||
694cc208 TJ |
351 | /* troubleshooting help: expose state in debugfs */ |
352 | ||
353 | static int debug_async_open(struct inode *, struct file *); | |
354 | static int debug_periodic_open(struct inode *, struct file *); | |
355 | static int debug_registers_open(struct inode *, struct file *); | |
356 | static int debug_async_open(struct inode *, struct file *); | |
aa4d8342 AD |
357 | static int debug_lpm_open(struct inode *, struct file *); |
358 | static ssize_t debug_lpm_read(struct file *file, char __user *user_buf, | |
359 | size_t count, loff_t *ppos); | |
360 | static ssize_t debug_lpm_write(struct file *file, const char __user *buffer, | |
361 | size_t count, loff_t *ppos); | |
362 | static int debug_lpm_close(struct inode *inode, struct file *file); | |
363 | ||
694cc208 TJ |
364 | static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*); |
365 | static int debug_close(struct inode *, struct file *); | |
366 | ||
367 | static const struct file_operations debug_async_fops = { | |
368 | .owner = THIS_MODULE, | |
369 | .open = debug_async_open, | |
370 | .read = debug_output, | |
371 | .release = debug_close, | |
6038f373 | 372 | .llseek = default_llseek, |
694cc208 TJ |
373 | }; |
374 | static const struct file_operations debug_periodic_fops = { | |
375 | .owner = THIS_MODULE, | |
376 | .open = debug_periodic_open, | |
377 | .read = debug_output, | |
378 | .release = debug_close, | |
6038f373 | 379 | .llseek = default_llseek, |
694cc208 TJ |
380 | }; |
381 | static const struct file_operations debug_registers_fops = { | |
382 | .owner = THIS_MODULE, | |
383 | .open = debug_registers_open, | |
384 | .read = debug_output, | |
385 | .release = debug_close, | |
6038f373 | 386 | .llseek = default_llseek, |
694cc208 | 387 | }; |
aa4d8342 AD |
388 | static const struct file_operations debug_lpm_fops = { |
389 | .owner = THIS_MODULE, | |
390 | .open = debug_lpm_open, | |
391 | .read = debug_lpm_read, | |
392 | .write = debug_lpm_write, | |
393 | .release = debug_lpm_close, | |
6038f373 | 394 | .llseek = noop_llseek, |
aa4d8342 | 395 | }; |
694cc208 TJ |
396 | |
397 | static struct dentry *ehci_debug_root; | |
398 | ||
399 | struct debug_buffer { | |
400 | ssize_t (*fill_func)(struct debug_buffer *); /* fill method */ | |
401 | struct usb_bus *bus; | |
402 | struct mutex mutex; /* protect filling of buffer */ | |
403 | size_t count; /* number of characters filled into buffer */ | |
3c04e20e ML |
404 | char *output_buf; |
405 | size_t alloc_size; | |
694cc208 | 406 | }; |
1da177e4 LT |
407 | |
408 | #define speed_char(info1) ({ char tmp; \ | |
409 | switch (info1 & (3 << 12)) { \ | |
410 | case 0 << 12: tmp = 'f'; break; \ | |
411 | case 1 << 12: tmp = 'l'; break; \ | |
412 | case 2 << 12: tmp = 'h'; break; \ | |
413 | default: tmp = '?'; break; \ | |
414 | }; tmp; }) | |
415 | ||
6dbd682b | 416 | static inline char token_mark(struct ehci_hcd *ehci, __hc32 token) |
1da177e4 | 417 | { |
6dbd682b SR |
418 | __u32 v = hc32_to_cpu(ehci, token); |
419 | ||
1da177e4 LT |
420 | if (v & QTD_STS_ACTIVE) |
421 | return '*'; | |
422 | if (v & QTD_STS_HALT) | |
423 | return '-'; | |
424 | if (!IS_SHORT_READ (v)) | |
425 | return ' '; | |
426 | /* tries to advance through hw_alt_next */ | |
427 | return '/'; | |
428 | } | |
429 | ||
430 | static void qh_lines ( | |
431 | struct ehci_hcd *ehci, | |
432 | struct ehci_qh *qh, | |
433 | char **nextp, | |
434 | unsigned *sizep | |
435 | ) | |
436 | { | |
437 | u32 scratch; | |
438 | u32 hw_curr; | |
439 | struct list_head *entry; | |
440 | struct ehci_qtd *td; | |
441 | unsigned temp; | |
442 | unsigned size = *sizep; | |
443 | char *next = *nextp; | |
444 | char mark; | |
fd05e720 | 445 | __le32 list_end = EHCI_LIST_END(ehci); |
3807e26d | 446 | struct ehci_qh_hw *hw = qh->hw; |
1da177e4 | 447 | |
3807e26d | 448 | if (hw->hw_qtd_next == list_end) /* NEC does this */ |
1da177e4 LT |
449 | mark = '@'; |
450 | else | |
3807e26d | 451 | mark = token_mark(ehci, hw->hw_token); |
1da177e4 | 452 | if (mark == '/') { /* qh_alt_next controls qh advance? */ |
3807e26d AD |
453 | if ((hw->hw_alt_next & QTD_MASK(ehci)) |
454 | == ehci->async->hw->hw_alt_next) | |
1da177e4 | 455 | mark = '#'; /* blocked */ |
3807e26d | 456 | else if (hw->hw_alt_next == list_end) |
1da177e4 LT |
457 | mark = '.'; /* use hw_qtd_next */ |
458 | /* else alt_next points to some other qtd */ | |
459 | } | |
3807e26d AD |
460 | scratch = hc32_to_cpup(ehci, &hw->hw_info1); |
461 | hw_curr = (mark == '*') ? hc32_to_cpup(ehci, &hw->hw_current) : 0; | |
1da177e4 LT |
462 | temp = scnprintf (next, size, |
463 | "qh/%p dev%d %cs ep%d %08x %08x (%08x%c %s nak%d)", | |
464 | qh, scratch & 0x007f, | |
465 | speed_char (scratch), | |
466 | (scratch >> 8) & 0x000f, | |
3807e26d AD |
467 | scratch, hc32_to_cpup(ehci, &hw->hw_info2), |
468 | hc32_to_cpup(ehci, &hw->hw_token), mark, | |
469 | (cpu_to_hc32(ehci, QTD_TOGGLE) & hw->hw_token) | |
1da177e4 | 470 | ? "data1" : "data0", |
3807e26d | 471 | (hc32_to_cpup(ehci, &hw->hw_alt_next) >> 1) & 0x0f); |
1da177e4 LT |
472 | size -= temp; |
473 | next += temp; | |
474 | ||
475 | /* hc may be modifying the list as we read it ... */ | |
476 | list_for_each (entry, &qh->qtd_list) { | |
477 | td = list_entry (entry, struct ehci_qtd, qtd_list); | |
6dbd682b | 478 | scratch = hc32_to_cpup(ehci, &td->hw_token); |
1da177e4 LT |
479 | mark = ' '; |
480 | if (hw_curr == td->qtd_dma) | |
481 | mark = '*'; | |
3807e26d | 482 | else if (hw->hw_qtd_next == cpu_to_hc32(ehci, td->qtd_dma)) |
1da177e4 LT |
483 | mark = '+'; |
484 | else if (QTD_LENGTH (scratch)) { | |
3807e26d | 485 | if (td->hw_alt_next == ehci->async->hw->hw_alt_next) |
1da177e4 | 486 | mark = '#'; |
6dbd682b | 487 | else if (td->hw_alt_next != list_end) |
1da177e4 LT |
488 | mark = '/'; |
489 | } | |
490 | temp = snprintf (next, size, | |
491 | "\n\t%p%c%s len=%d %08x urb %p", | |
492 | td, mark, ({ char *tmp; | |
493 | switch ((scratch>>8)&0x03) { | |
494 | case 0: tmp = "out"; break; | |
495 | case 1: tmp = "in"; break; | |
496 | case 2: tmp = "setup"; break; | |
497 | default: tmp = "?"; break; | |
498 | } tmp;}), | |
499 | (scratch >> 16) & 0x7fff, | |
500 | scratch, | |
501 | td->urb); | |
e64a5219 | 502 | if (size < temp) |
1da177e4 LT |
503 | temp = size; |
504 | size -= temp; | |
505 | next += temp; | |
506 | if (temp == size) | |
507 | goto done; | |
508 | } | |
509 | ||
510 | temp = snprintf (next, size, "\n"); | |
e64a5219 | 511 | if (size < temp) |
1da177e4 LT |
512 | temp = size; |
513 | size -= temp; | |
514 | next += temp; | |
515 | ||
516 | done: | |
517 | *sizep = size; | |
518 | *nextp = next; | |
519 | } | |
520 | ||
694cc208 | 521 | static ssize_t fill_async_buffer(struct debug_buffer *buf) |
1da177e4 | 522 | { |
1da177e4 LT |
523 | struct usb_hcd *hcd; |
524 | struct ehci_hcd *ehci; | |
525 | unsigned long flags; | |
526 | unsigned temp, size; | |
527 | char *next; | |
528 | struct ehci_qh *qh; | |
529 | ||
694cc208 | 530 | hcd = bus_to_hcd(buf->bus); |
1da177e4 | 531 | ehci = hcd_to_ehci (hcd); |
3c04e20e ML |
532 | next = buf->output_buf; |
533 | size = buf->alloc_size; | |
1da177e4 | 534 | |
694cc208 TJ |
535 | *next = 0; |
536 | ||
1da177e4 LT |
537 | /* dumps a snapshot of the async schedule. |
538 | * usually empty except for long-term bulk reads, or head. | |
539 | * one QH per line, and TDs we know about | |
540 | */ | |
541 | spin_lock_irqsave (&ehci->lock, flags); | |
542 | for (qh = ehci->async->qh_next.qh; size > 0 && qh; qh = qh->qh_next.qh) | |
543 | qh_lines (ehci, qh, &next, &size); | |
544 | if (ehci->reclaim && size > 0) { | |
545 | temp = scnprintf (next, size, "\nreclaim =\n"); | |
546 | size -= temp; | |
547 | next += temp; | |
548 | ||
549 | for (qh = ehci->reclaim; size > 0 && qh; qh = qh->reclaim) | |
550 | qh_lines (ehci, qh, &next, &size); | |
551 | } | |
552 | spin_unlock_irqrestore (&ehci->lock, flags); | |
553 | ||
3c04e20e | 554 | return strlen(buf->output_buf); |
1da177e4 | 555 | } |
1da177e4 LT |
556 | |
557 | #define DBG_SCHED_LIMIT 64 | |
694cc208 | 558 | static ssize_t fill_periodic_buffer(struct debug_buffer *buf) |
1da177e4 | 559 | { |
1da177e4 LT |
560 | struct usb_hcd *hcd; |
561 | struct ehci_hcd *ehci; | |
562 | unsigned long flags; | |
563 | union ehci_shadow p, *seen; | |
564 | unsigned temp, size, seen_count; | |
565 | char *next; | |
566 | unsigned i; | |
6dbd682b | 567 | __hc32 tag; |
1da177e4 | 568 | |
54e6ecb2 | 569 | if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC))) |
1da177e4 LT |
570 | return 0; |
571 | seen_count = 0; | |
572 | ||
694cc208 | 573 | hcd = bus_to_hcd(buf->bus); |
1da177e4 | 574 | ehci = hcd_to_ehci (hcd); |
3c04e20e ML |
575 | next = buf->output_buf; |
576 | size = buf->alloc_size; | |
1da177e4 LT |
577 | |
578 | temp = scnprintf (next, size, "size = %d\n", ehci->periodic_size); | |
579 | size -= temp; | |
580 | next += temp; | |
581 | ||
582 | /* dump a snapshot of the periodic schedule. | |
583 | * iso changes, interrupt usually doesn't. | |
584 | */ | |
585 | spin_lock_irqsave (&ehci->lock, flags); | |
586 | for (i = 0; i < ehci->periodic_size; i++) { | |
587 | p = ehci->pshadow [i]; | |
588 | if (likely (!p.ptr)) | |
589 | continue; | |
6dbd682b | 590 | tag = Q_NEXT_TYPE(ehci, ehci->periodic [i]); |
1da177e4 LT |
591 | |
592 | temp = scnprintf (next, size, "%4d: ", i); | |
593 | size -= temp; | |
594 | next += temp; | |
595 | ||
596 | do { | |
3807e26d AD |
597 | struct ehci_qh_hw *hw; |
598 | ||
6dbd682b | 599 | switch (hc32_to_cpu(ehci, tag)) { |
1da177e4 | 600 | case Q_TYPE_QH: |
3807e26d | 601 | hw = p.qh->hw; |
1da177e4 LT |
602 | temp = scnprintf (next, size, " qh%d-%04x/%p", |
603 | p.qh->period, | |
6dbd682b | 604 | hc32_to_cpup(ehci, |
3807e26d | 605 | &hw->hw_info2) |
1da177e4 | 606 | /* uframe masks */ |
7dedacf4 | 607 | & (QH_CMASK | QH_SMASK), |
1da177e4 LT |
608 | p.qh); |
609 | size -= temp; | |
610 | next += temp; | |
611 | /* don't repeat what follows this qh */ | |
612 | for (temp = 0; temp < seen_count; temp++) { | |
613 | if (seen [temp].ptr != p.ptr) | |
614 | continue; | |
3c4bb71f | 615 | if (p.qh->qh_next.ptr) { |
1da177e4 LT |
616 | temp = scnprintf (next, size, |
617 | " ..."); | |
3c4bb71f ML |
618 | size -= temp; |
619 | next += temp; | |
620 | } | |
1da177e4 LT |
621 | break; |
622 | } | |
623 | /* show more info the first time around */ | |
3c4bb71f | 624 | if (temp == seen_count) { |
6dbd682b | 625 | u32 scratch = hc32_to_cpup(ehci, |
3807e26d | 626 | &hw->hw_info1); |
1da177e4 LT |
627 | struct ehci_qtd *qtd; |
628 | char *type = ""; | |
629 | ||
630 | /* count tds, get ep direction */ | |
631 | temp = 0; | |
632 | list_for_each_entry (qtd, | |
633 | &p.qh->qtd_list, | |
634 | qtd_list) { | |
635 | temp++; | |
6dbd682b SR |
636 | switch (0x03 & (hc32_to_cpu( |
637 | ehci, | |
1da177e4 LT |
638 | qtd->hw_token) >> 8)) { |
639 | case 0: type = "out"; continue; | |
640 | case 1: type = "in"; continue; | |
641 | } | |
642 | } | |
643 | ||
644 | temp = scnprintf (next, size, | |
645 | " (%c%d ep%d%s " | |
646 | "[%d/%d] q%d p%d)", | |
647 | speed_char (scratch), | |
648 | scratch & 0x007f, | |
649 | (scratch >> 8) & 0x000f, type, | |
650 | p.qh->usecs, p.qh->c_usecs, | |
651 | temp, | |
652 | 0x7ff & (scratch >> 16)); | |
653 | ||
654 | if (seen_count < DBG_SCHED_LIMIT) | |
655 | seen [seen_count++].qh = p.qh; | |
656 | } else | |
657 | temp = 0; | |
658 | if (p.qh) { | |
3807e26d | 659 | tag = Q_NEXT_TYPE(ehci, hw->hw_next); |
1da177e4 LT |
660 | p = p.qh->qh_next; |
661 | } | |
662 | break; | |
663 | case Q_TYPE_FSTN: | |
664 | temp = scnprintf (next, size, | |
665 | " fstn-%8x/%p", p.fstn->hw_prev, | |
666 | p.fstn); | |
6dbd682b | 667 | tag = Q_NEXT_TYPE(ehci, p.fstn->hw_next); |
1da177e4 LT |
668 | p = p.fstn->fstn_next; |
669 | break; | |
670 | case Q_TYPE_ITD: | |
671 | temp = scnprintf (next, size, | |
672 | " itd/%p", p.itd); | |
6dbd682b | 673 | tag = Q_NEXT_TYPE(ehci, p.itd->hw_next); |
1da177e4 LT |
674 | p = p.itd->itd_next; |
675 | break; | |
676 | case Q_TYPE_SITD: | |
677 | temp = scnprintf (next, size, | |
678 | " sitd%d-%04x/%p", | |
679 | p.sitd->stream->interval, | |
6dbd682b | 680 | hc32_to_cpup(ehci, &p.sitd->hw_uframe) |
1da177e4 LT |
681 | & 0x0000ffff, |
682 | p.sitd); | |
6dbd682b | 683 | tag = Q_NEXT_TYPE(ehci, p.sitd->hw_next); |
1da177e4 LT |
684 | p = p.sitd->sitd_next; |
685 | break; | |
686 | } | |
687 | size -= temp; | |
688 | next += temp; | |
689 | } while (p.ptr); | |
690 | ||
691 | temp = scnprintf (next, size, "\n"); | |
692 | size -= temp; | |
693 | next += temp; | |
694 | } | |
695 | spin_unlock_irqrestore (&ehci->lock, flags); | |
696 | kfree (seen); | |
697 | ||
3c04e20e | 698 | return buf->alloc_size - size; |
1da177e4 | 699 | } |
1da177e4 LT |
700 | #undef DBG_SCHED_LIMIT |
701 | ||
694cc208 | 702 | static ssize_t fill_registers_buffer(struct debug_buffer *buf) |
1da177e4 | 703 | { |
1da177e4 LT |
704 | struct usb_hcd *hcd; |
705 | struct ehci_hcd *ehci; | |
706 | unsigned long flags; | |
707 | unsigned temp, size, i; | |
708 | char *next, scratch [80]; | |
709 | static char fmt [] = "%*s\n"; | |
710 | static char label [] = ""; | |
711 | ||
694cc208 | 712 | hcd = bus_to_hcd(buf->bus); |
1da177e4 | 713 | ehci = hcd_to_ehci (hcd); |
3c04e20e ML |
714 | next = buf->output_buf; |
715 | size = buf->alloc_size; | |
1da177e4 LT |
716 | |
717 | spin_lock_irqsave (&ehci->lock, flags); | |
718 | ||
541c7d43 | 719 | if (!HCD_HW_ACCESSIBLE(hcd)) { |
1da177e4 | 720 | size = scnprintf (next, size, |
2b70f073 | 721 | "bus %s, device %s\n" |
d49d4317 | 722 | "%s\n" |
1da177e4 LT |
723 | "SUSPENDED (no register access)\n", |
724 | hcd->self.controller->bus->name, | |
7071a3ce | 725 | dev_name(hcd->self.controller), |
d49d4317 | 726 | hcd->product_desc); |
1da177e4 LT |
727 | goto done; |
728 | } | |
729 | ||
730 | /* Capability Registers */ | |
083522d7 | 731 | i = HC_VERSION(ehci_readl(ehci, &ehci->caps->hc_capbase)); |
1da177e4 | 732 | temp = scnprintf (next, size, |
2b70f073 | 733 | "bus %s, device %s\n" |
d49d4317 | 734 | "%s\n" |
1da177e4 LT |
735 | "EHCI %x.%02x, hcd state %d\n", |
736 | hcd->self.controller->bus->name, | |
7071a3ce | 737 | dev_name(hcd->self.controller), |
d49d4317 | 738 | hcd->product_desc, |
1da177e4 LT |
739 | i >> 8, i & 0x0ff, hcd->state); |
740 | size -= temp; | |
741 | next += temp; | |
742 | ||
d49d4317 DB |
743 | #ifdef CONFIG_PCI |
744 | /* EHCI 0.96 and later may have "extended capabilities" */ | |
745 | if (hcd->self.controller->bus == &pci_bus_type) { | |
746 | struct pci_dev *pdev; | |
747 | u32 offset, cap, cap2; | |
748 | unsigned count = 256/4; | |
749 | ||
750 | pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller); | |
6dbd682b SR |
751 | offset = HCC_EXT_CAPS(ehci_readl(ehci, |
752 | &ehci->caps->hcc_params)); | |
d49d4317 DB |
753 | while (offset && count--) { |
754 | pci_read_config_dword (pdev, offset, &cap); | |
755 | switch (cap & 0xff) { | |
756 | case 1: | |
757 | temp = scnprintf (next, size, | |
758 | "ownership %08x%s%s\n", cap, | |
759 | (cap & (1 << 24)) ? " linux" : "", | |
760 | (cap & (1 << 16)) ? " firmware" : ""); | |
761 | size -= temp; | |
762 | next += temp; | |
763 | ||
764 | offset += 4; | |
765 | pci_read_config_dword (pdev, offset, &cap2); | |
766 | temp = scnprintf (next, size, | |
767 | "SMI sts/enable 0x%08x\n", cap2); | |
768 | size -= temp; | |
769 | next += temp; | |
770 | break; | |
771 | case 0: /* illegal reserved capability */ | |
772 | cap = 0; | |
773 | /* FALLTHROUGH */ | |
774 | default: /* unknown */ | |
775 | break; | |
776 | } | |
777 | temp = (cap >> 8) & 0xff; | |
778 | } | |
779 | } | |
780 | #endif | |
781 | ||
1da177e4 | 782 | // FIXME interpret both types of params |
083522d7 | 783 | i = ehci_readl(ehci, &ehci->caps->hcs_params); |
1da177e4 LT |
784 | temp = scnprintf (next, size, "structural params 0x%08x\n", i); |
785 | size -= temp; | |
786 | next += temp; | |
787 | ||
083522d7 | 788 | i = ehci_readl(ehci, &ehci->caps->hcc_params); |
1da177e4 LT |
789 | temp = scnprintf (next, size, "capability params 0x%08x\n", i); |
790 | size -= temp; | |
791 | next += temp; | |
792 | ||
793 | /* Operational Registers */ | |
794 | temp = dbg_status_buf (scratch, sizeof scratch, label, | |
083522d7 | 795 | ehci_readl(ehci, &ehci->regs->status)); |
1da177e4 LT |
796 | temp = scnprintf (next, size, fmt, temp, scratch); |
797 | size -= temp; | |
798 | next += temp; | |
799 | ||
800 | temp = dbg_command_buf (scratch, sizeof scratch, label, | |
083522d7 | 801 | ehci_readl(ehci, &ehci->regs->command)); |
1da177e4 LT |
802 | temp = scnprintf (next, size, fmt, temp, scratch); |
803 | size -= temp; | |
804 | next += temp; | |
805 | ||
806 | temp = dbg_intr_buf (scratch, sizeof scratch, label, | |
083522d7 | 807 | ehci_readl(ehci, &ehci->regs->intr_enable)); |
1da177e4 LT |
808 | temp = scnprintf (next, size, fmt, temp, scratch); |
809 | size -= temp; | |
810 | next += temp; | |
811 | ||
812 | temp = scnprintf (next, size, "uframe %04x\n", | |
083522d7 | 813 | ehci_readl(ehci, &ehci->regs->frame_index)); |
1da177e4 LT |
814 | size -= temp; |
815 | next += temp; | |
816 | ||
d49d4317 DB |
817 | for (i = 1; i <= HCS_N_PORTS (ehci->hcs_params); i++) { |
818 | temp = dbg_port_buf (scratch, sizeof scratch, label, i, | |
6dbd682b SR |
819 | ehci_readl(ehci, |
820 | &ehci->regs->port_status[i - 1])); | |
1da177e4 LT |
821 | temp = scnprintf (next, size, fmt, temp, scratch); |
822 | size -= temp; | |
823 | next += temp; | |
d49d4317 DB |
824 | if (i == HCS_DEBUG_PORT(ehci->hcs_params) && ehci->debug) { |
825 | temp = scnprintf (next, size, | |
826 | " debug control %08x\n", | |
6dbd682b SR |
827 | ehci_readl(ehci, |
828 | &ehci->debug->control)); | |
d49d4317 DB |
829 | size -= temp; |
830 | next += temp; | |
831 | } | |
1da177e4 LT |
832 | } |
833 | ||
834 | if (ehci->reclaim) { | |
07d29b63 | 835 | temp = scnprintf(next, size, "reclaim qh %p\n", ehci->reclaim); |
1da177e4 LT |
836 | size -= temp; |
837 | next += temp; | |
838 | } | |
839 | ||
840 | #ifdef EHCI_STATS | |
841 | temp = scnprintf (next, size, | |
842 | "irq normal %ld err %ld reclaim %ld (lost %ld)\n", | |
843 | ehci->stats.normal, ehci->stats.error, ehci->stats.reclaim, | |
844 | ehci->stats.lost_iaa); | |
845 | size -= temp; | |
846 | next += temp; | |
847 | ||
848 | temp = scnprintf (next, size, "complete %ld unlink %ld\n", | |
849 | ehci->stats.complete, ehci->stats.unlink); | |
850 | size -= temp; | |
851 | next += temp; | |
852 | #endif | |
853 | ||
854 | done: | |
855 | spin_unlock_irqrestore (&ehci->lock, flags); | |
856 | ||
3c04e20e | 857 | return buf->alloc_size - size; |
1da177e4 | 858 | } |
1da177e4 | 859 | |
694cc208 TJ |
860 | static struct debug_buffer *alloc_buffer(struct usb_bus *bus, |
861 | ssize_t (*fill_func)(struct debug_buffer *)) | |
1da177e4 | 862 | { |
694cc208 TJ |
863 | struct debug_buffer *buf; |
864 | ||
865 | buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL); | |
1da177e4 | 866 | |
694cc208 TJ |
867 | if (buf) { |
868 | buf->bus = bus; | |
869 | buf->fill_func = fill_func; | |
870 | mutex_init(&buf->mutex); | |
3c04e20e | 871 | buf->alloc_size = PAGE_SIZE; |
694cc208 TJ |
872 | } |
873 | ||
874 | return buf; | |
1da177e4 LT |
875 | } |
876 | ||
694cc208 | 877 | static int fill_buffer(struct debug_buffer *buf) |
1da177e4 | 878 | { |
694cc208 TJ |
879 | int ret = 0; |
880 | ||
3c04e20e ML |
881 | if (!buf->output_buf) |
882 | buf->output_buf = (char *)vmalloc(buf->alloc_size); | |
694cc208 | 883 | |
3c04e20e | 884 | if (!buf->output_buf) { |
694cc208 TJ |
885 | ret = -ENOMEM; |
886 | goto out; | |
887 | } | |
888 | ||
889 | ret = buf->fill_func(buf); | |
1da177e4 | 890 | |
694cc208 TJ |
891 | if (ret >= 0) { |
892 | buf->count = ret; | |
893 | ret = 0; | |
894 | } | |
895 | ||
896 | out: | |
897 | return ret; | |
1da177e4 LT |
898 | } |
899 | ||
694cc208 TJ |
900 | static ssize_t debug_output(struct file *file, char __user *user_buf, |
901 | size_t len, loff_t *offset) | |
902 | { | |
903 | struct debug_buffer *buf = file->private_data; | |
904 | int ret = 0; | |
905 | ||
906 | mutex_lock(&buf->mutex); | |
907 | if (buf->count == 0) { | |
908 | ret = fill_buffer(buf); | |
909 | if (ret != 0) { | |
910 | mutex_unlock(&buf->mutex); | |
911 | goto out; | |
912 | } | |
913 | } | |
914 | mutex_unlock(&buf->mutex); | |
915 | ||
916 | ret = simple_read_from_buffer(user_buf, len, offset, | |
3c04e20e | 917 | buf->output_buf, buf->count); |
694cc208 TJ |
918 | |
919 | out: | |
920 | return ret; | |
921 | ||
922 | } | |
923 | ||
924 | static int debug_close(struct inode *inode, struct file *file) | |
925 | { | |
926 | struct debug_buffer *buf = file->private_data; | |
1da177e4 | 927 | |
694cc208 | 928 | if (buf) { |
f8086a07 | 929 | vfree(buf->output_buf); |
694cc208 TJ |
930 | kfree(buf); |
931 | } | |
932 | ||
933 | return 0; | |
934 | } | |
935 | static int debug_async_open(struct inode *inode, struct file *file) | |
936 | { | |
937 | file->private_data = alloc_buffer(inode->i_private, fill_async_buffer); | |
938 | ||
939 | return file->private_data ? 0 : -ENOMEM; | |
940 | } | |
941 | ||
942 | static int debug_periodic_open(struct inode *inode, struct file *file) | |
943 | { | |
3c04e20e ML |
944 | struct debug_buffer *buf; |
945 | buf = alloc_buffer(inode->i_private, fill_periodic_buffer); | |
946 | if (!buf) | |
947 | return -ENOMEM; | |
694cc208 | 948 | |
3c04e20e ML |
949 | buf->alloc_size = (sizeof(void *) == 4 ? 6 : 8)*PAGE_SIZE; |
950 | file->private_data = buf; | |
951 | return 0; | |
694cc208 TJ |
952 | } |
953 | ||
954 | static int debug_registers_open(struct inode *inode, struct file *file) | |
955 | { | |
956 | file->private_data = alloc_buffer(inode->i_private, | |
957 | fill_registers_buffer); | |
958 | ||
959 | return file->private_data ? 0 : -ENOMEM; | |
960 | } | |
961 | ||
aa4d8342 AD |
962 | static int debug_lpm_open(struct inode *inode, struct file *file) |
963 | { | |
964 | file->private_data = inode->i_private; | |
965 | return 0; | |
966 | } | |
967 | ||
968 | static int debug_lpm_close(struct inode *inode, struct file *file) | |
969 | { | |
970 | return 0; | |
971 | } | |
972 | ||
973 | static ssize_t debug_lpm_read(struct file *file, char __user *user_buf, | |
974 | size_t count, loff_t *ppos) | |
975 | { | |
976 | /* TODO: show lpm stats */ | |
977 | return 0; | |
978 | } | |
979 | ||
980 | static ssize_t debug_lpm_write(struct file *file, const char __user *user_buf, | |
981 | size_t count, loff_t *ppos) | |
982 | { | |
983 | struct usb_hcd *hcd; | |
984 | struct ehci_hcd *ehci; | |
985 | char buf[50]; | |
986 | size_t len; | |
987 | u32 temp; | |
988 | unsigned long port; | |
989 | u32 __iomem *portsc ; | |
990 | u32 params; | |
991 | ||
992 | hcd = bus_to_hcd(file->private_data); | |
993 | ehci = hcd_to_ehci(hcd); | |
994 | ||
995 | len = min(count, sizeof(buf) - 1); | |
996 | if (copy_from_user(buf, user_buf, len)) | |
997 | return -EFAULT; | |
998 | buf[len] = '\0'; | |
999 | if (len > 0 && buf[len - 1] == '\n') | |
1000 | buf[len - 1] = '\0'; | |
1001 | ||
1002 | if (strncmp(buf, "enable", 5) == 0) { | |
1003 | if (strict_strtoul(buf + 7, 10, &port)) | |
1004 | return -EINVAL; | |
1005 | params = ehci_readl(ehci, &ehci->caps->hcs_params); | |
1006 | if (port > HCS_N_PORTS(params)) { | |
1007 | ehci_dbg(ehci, "ERR: LPM on bad port %lu\n", port); | |
1008 | return -ENODEV; | |
1009 | } | |
1010 | portsc = &ehci->regs->port_status[port-1]; | |
1011 | temp = ehci_readl(ehci, portsc); | |
1012 | if (!(temp & PORT_DEV_ADDR)) { | |
1013 | ehci_dbg(ehci, "LPM: no device attached\n"); | |
1014 | return -ENODEV; | |
1015 | } | |
1016 | temp |= PORT_LPM; | |
1017 | ehci_writel(ehci, temp, portsc); | |
1018 | printk(KERN_INFO "force enable LPM for port %lu\n", port); | |
1019 | } else if (strncmp(buf, "hird=", 5) == 0) { | |
1020 | unsigned long hird; | |
1021 | if (strict_strtoul(buf + 5, 16, &hird)) | |
1022 | return -EINVAL; | |
1023 | printk(KERN_INFO "setting hird %s %lu\n", buf + 6, hird); | |
1024 | temp = ehci_readl(ehci, &ehci->regs->command); | |
1025 | temp &= ~CMD_HIRD; | |
1026 | temp |= hird << 24; | |
1027 | ehci_writel(ehci, temp, &ehci->regs->command); | |
1028 | } else if (strncmp(buf, "disable", 7) == 0) { | |
1029 | if (strict_strtoul(buf + 8, 10, &port)) | |
1030 | return -EINVAL; | |
1031 | params = ehci_readl(ehci, &ehci->caps->hcs_params); | |
1032 | if (port > HCS_N_PORTS(params)) { | |
1033 | ehci_dbg(ehci, "ERR: LPM off bad port %lu\n", port); | |
1034 | return -ENODEV; | |
1035 | } | |
1036 | portsc = &ehci->regs->port_status[port-1]; | |
1037 | temp = ehci_readl(ehci, portsc); | |
1038 | if (!(temp & PORT_DEV_ADDR)) { | |
1039 | ehci_dbg(ehci, "ERR: no device attached\n"); | |
1040 | return -ENODEV; | |
1041 | } | |
1042 | temp &= ~PORT_LPM; | |
1043 | ehci_writel(ehci, temp, portsc); | |
1044 | printk(KERN_INFO "disabled LPM for port %lu\n", port); | |
1045 | } else | |
1046 | return -EOPNOTSUPP; | |
1047 | return count; | |
1048 | } | |
1049 | ||
694cc208 TJ |
1050 | static inline void create_debug_files (struct ehci_hcd *ehci) |
1051 | { | |
1052 | struct usb_bus *bus = &ehci_to_hcd(ehci)->self; | |
1053 | ||
1054 | ehci->debug_dir = debugfs_create_dir(bus->bus_name, ehci_debug_root); | |
1055 | if (!ehci->debug_dir) | |
185c9bcf ML |
1056 | return; |
1057 | ||
1058 | if (!debugfs_create_file("async", S_IRUGO, ehci->debug_dir, bus, | |
1059 | &debug_async_fops)) | |
1060 | goto file_error; | |
1061 | ||
1062 | if (!debugfs_create_file("periodic", S_IRUGO, ehci->debug_dir, bus, | |
1063 | &debug_periodic_fops)) | |
1064 | goto file_error; | |
1065 | ||
1066 | if (!debugfs_create_file("registers", S_IRUGO, ehci->debug_dir, bus, | |
1067 | &debug_registers_fops)) | |
1068 | goto file_error; | |
1069 | ||
1070 | if (!debugfs_create_file("lpm", S_IRUGO|S_IWUGO, ehci->debug_dir, bus, | |
1071 | &debug_lpm_fops)) | |
1072 | goto file_error; | |
1073 | ||
694cc208 TJ |
1074 | return; |
1075 | ||
185c9bcf ML |
1076 | file_error: |
1077 | debugfs_remove_recursive(ehci->debug_dir); | |
694cc208 TJ |
1078 | } |
1079 | ||
1080 | static inline void remove_debug_files (struct ehci_hcd *ehci) | |
1081 | { | |
185c9bcf | 1082 | debugfs_remove_recursive(ehci->debug_dir); |
694cc208 TJ |
1083 | } |
1084 | ||
1085 | #endif /* STUB_DEBUG_FILES */ |