Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * UHCI-specific debugging code. Invaluable when something |
| 3 | * goes wrong, but don't get in my face. |
| 4 | * |
Alan Stern | 687f5f3 | 2005-11-30 17:16:19 -0500 | [diff] [blame] | 5 | * Kernel visible pointers are surrounded in []s and bus |
| 6 | * visible pointers are surrounded in ()s |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * |
| 8 | * (C) Copyright 1999 Linus Torvalds |
| 9 | * (C) Copyright 1999-2001 Johannes Erdfelt |
| 10 | */ |
| 11 | |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 12 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/kernel.h> |
| 14 | #include <linux/debugfs.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | #include <asm/io.h> |
| 16 | |
| 17 | #include "uhci-hcd.h" |
| 18 | |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 19 | #define EXTRA_SPACE 1024 |
| 20 | |
Alan Stern | 8d402e1 | 2005-12-17 18:03:37 -0500 | [diff] [blame] | 21 | static struct dentry *uhci_debugfs_root; |
| 22 | |
Oliver Neukum | 1c20163 | 2013-11-18 13:23:16 +0100 | [diff] [blame] | 23 | #ifdef CONFIG_DYNAMIC_DEBUG |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | |
Alan Stern | 687f5f3 | 2005-11-30 17:16:19 -0500 | [diff] [blame] | 25 | /* Handle REALLY large printks so we don't overflow buffers */ |
Alan Stern | 8d402e1 | 2005-12-17 18:03:37 -0500 | [diff] [blame] | 26 | static void lprintk(char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | { |
| 28 | char *p; |
| 29 | |
| 30 | /* Just write one line at a time */ |
| 31 | while (buf) { |
| 32 | p = strchr(buf, '\n'); |
| 33 | if (p) |
| 34 | *p = 0; |
| 35 | printk(KERN_DEBUG "%s\n", buf); |
| 36 | buf = p; |
| 37 | if (buf) |
| 38 | buf++; |
| 39 | } |
| 40 | } |
| 41 | |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 42 | static int uhci_show_td(struct uhci_hcd *uhci, struct uhci_td *td, char *buf, |
| 43 | int len, int space) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | { |
| 45 | char *out = buf; |
| 46 | char *spid; |
| 47 | u32 status, token; |
| 48 | |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 49 | status = td_status(uhci, td); |
| 50 | out += sprintf(out, "%*s[%p] link (%08x) ", space, "", td, |
| 51 | hc32_to_cpu(uhci, td->link)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | out += sprintf(out, "e%d %s%s%s%s%s%s%s%s%s%sLength=%x ", |
| 53 | ((status >> 27) & 3), |
| 54 | (status & TD_CTRL_SPD) ? "SPD " : "", |
| 55 | (status & TD_CTRL_LS) ? "LS " : "", |
| 56 | (status & TD_CTRL_IOC) ? "IOC " : "", |
| 57 | (status & TD_CTRL_ACTIVE) ? "Active " : "", |
| 58 | (status & TD_CTRL_STALLED) ? "Stalled " : "", |
| 59 | (status & TD_CTRL_DBUFERR) ? "DataBufErr " : "", |
| 60 | (status & TD_CTRL_BABBLE) ? "Babble " : "", |
| 61 | (status & TD_CTRL_NAK) ? "NAK " : "", |
| 62 | (status & TD_CTRL_CRCTIMEO) ? "CRC/Timeo " : "", |
| 63 | (status & TD_CTRL_BITSTUFF) ? "BitStuff " : "", |
| 64 | status & 0x7ff); |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 65 | if (out - buf > len) |
| 66 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 68 | token = td_token(uhci, td); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | switch (uhci_packetid(token)) { |
| 70 | case USB_PID_SETUP: |
| 71 | spid = "SETUP"; |
| 72 | break; |
| 73 | case USB_PID_OUT: |
| 74 | spid = "OUT"; |
| 75 | break; |
| 76 | case USB_PID_IN: |
| 77 | spid = "IN"; |
| 78 | break; |
| 79 | default: |
| 80 | spid = "?"; |
| 81 | break; |
| 82 | } |
| 83 | |
| 84 | out += sprintf(out, "MaxLen=%x DT%d EndPt=%x Dev=%x, PID=%x(%s) ", |
| 85 | token >> 21, |
| 86 | ((token >> 19) & 1), |
| 87 | (token >> 15) & 15, |
| 88 | (token >> 8) & 127, |
| 89 | (token & 0xff), |
| 90 | spid); |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 91 | out += sprintf(out, "(buf=%08x)\n", hc32_to_cpu(uhci, td->buffer)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 93 | done: |
| 94 | if (out - buf > len) |
| 95 | out += sprintf(out, " ...\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | return out - buf; |
| 97 | } |
| 98 | |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 99 | static int uhci_show_urbp(struct uhci_hcd *uhci, struct urb_priv *urbp, |
| 100 | char *buf, int len, int space) |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 101 | { |
| 102 | char *out = buf; |
| 103 | struct uhci_td *td; |
| 104 | int i, nactive, ninactive; |
Alan Stern | 4de7d2c | 2006-05-05 16:26:58 -0400 | [diff] [blame] | 105 | char *ptype; |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 106 | |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 107 | |
| 108 | out += sprintf(out, "urb_priv [%p] ", urbp); |
| 109 | out += sprintf(out, "urb [%p] ", urbp->urb); |
| 110 | out += sprintf(out, "qh [%p] ", urbp->qh); |
| 111 | out += sprintf(out, "Dev=%d ", usb_pipedevice(urbp->urb->pipe)); |
| 112 | out += sprintf(out, "EP=%x(%s) ", usb_pipeendpoint(urbp->urb->pipe), |
| 113 | (usb_pipein(urbp->urb->pipe) ? "IN" : "OUT")); |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 114 | if (out - buf > len) |
| 115 | goto done; |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 116 | |
| 117 | switch (usb_pipetype(urbp->urb->pipe)) { |
Alan Stern | 4de7d2c | 2006-05-05 16:26:58 -0400 | [diff] [blame] | 118 | case PIPE_ISOCHRONOUS: ptype = "ISO"; break; |
| 119 | case PIPE_INTERRUPT: ptype = "INT"; break; |
| 120 | case PIPE_BULK: ptype = "BLK"; break; |
| 121 | default: |
| 122 | case PIPE_CONTROL: ptype = "CTL"; break; |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 123 | } |
| 124 | |
Alan Stern | 4de7d2c | 2006-05-05 16:26:58 -0400 | [diff] [blame] | 125 | out += sprintf(out, "%s%s", ptype, (urbp->fsbr ? " FSBR" : "")); |
Alan Stern | 7ea0a2b | 2009-03-05 11:01:11 -0500 | [diff] [blame] | 126 | out += sprintf(out, " Actlen=%d%s", urbp->urb->actual_length, |
| 127 | (urbp->qh->type == USB_ENDPOINT_XFER_CONTROL ? |
| 128 | "-8" : "")); |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 129 | |
Alan Stern | eb23105 | 2007-08-21 15:40:36 -0400 | [diff] [blame] | 130 | if (urbp->urb->unlinked) |
| 131 | out += sprintf(out, " Unlinked=%d", urbp->urb->unlinked); |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 132 | out += sprintf(out, "\n"); |
| 133 | |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 134 | if (out - buf > len) |
| 135 | goto done; |
| 136 | |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 137 | i = nactive = ninactive = 0; |
| 138 | list_for_each_entry(td, &urbp->td_list, list) { |
Alan Stern | c8155cc | 2006-05-19 16:52:35 -0400 | [diff] [blame] | 139 | if (urbp->qh->type != USB_ENDPOINT_XFER_ISOC && |
| 140 | (++i <= 10 || debug > 2)) { |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 141 | out += sprintf(out, "%*s%d: ", space + 2, "", i); |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 142 | out += uhci_show_td(uhci, td, out, |
| 143 | len - (out - buf), 0); |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 144 | if (out - buf > len) |
| 145 | goto tail; |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 146 | } else { |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 147 | if (td_status(uhci, td) & TD_CTRL_ACTIVE) |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 148 | ++nactive; |
| 149 | else |
| 150 | ++ninactive; |
| 151 | } |
| 152 | } |
| 153 | if (nactive + ninactive > 0) |
Chen Gang | 3171fca | 2013-01-24 09:41:45 +0800 | [diff] [blame] | 154 | out += sprintf(out, |
| 155 | "%*s[skipped %d inactive and %d active TDs]\n", |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 156 | space, "", ninactive, nactive); |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 157 | done: |
| 158 | if (out - buf > len) |
| 159 | out += sprintf(out, " ...\n"); |
| 160 | tail: |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 161 | return out - buf; |
| 162 | } |
| 163 | |
Alan Stern | e009f1b | 2007-03-19 15:31:42 -0400 | [diff] [blame] | 164 | static int uhci_show_qh(struct uhci_hcd *uhci, |
| 165 | struct uhci_qh *qh, char *buf, int len, int space) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | { |
| 167 | char *out = buf; |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 168 | int i, nurbs; |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 169 | __hc32 element = qh_element(qh); |
Alan Stern | 4de7d2c | 2006-05-05 16:26:58 -0400 | [diff] [blame] | 170 | char *qtype; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | |
Alan Stern | 4de7d2c | 2006-05-05 16:26:58 -0400 | [diff] [blame] | 172 | switch (qh->type) { |
| 173 | case USB_ENDPOINT_XFER_ISOC: qtype = "ISO"; break; |
| 174 | case USB_ENDPOINT_XFER_INT: qtype = "INT"; break; |
| 175 | case USB_ENDPOINT_XFER_BULK: qtype = "BLK"; break; |
| 176 | case USB_ENDPOINT_XFER_CONTROL: qtype = "CTL"; break; |
| 177 | default: qtype = "Skel" ; break; |
| 178 | } |
| 179 | |
| 180 | out += sprintf(out, "%*s[%p] %s QH link (%08x) element (%08x)\n", |
| 181 | space, "", qh, qtype, |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 182 | hc32_to_cpu(uhci, qh->link), |
| 183 | hc32_to_cpu(uhci, element)); |
Alan Stern | caf3827 | 2006-05-19 16:44:55 -0400 | [diff] [blame] | 184 | if (qh->type == USB_ENDPOINT_XFER_ISOC) |
Chen Gang | 3171fca | 2013-01-24 09:41:45 +0800 | [diff] [blame] | 185 | out += sprintf(out, |
| 186 | "%*s period %d phase %d load %d us, frame %x desc [%p]\n", |
Alan Stern | 3ca2a32 | 2007-01-16 11:56:32 -0500 | [diff] [blame] | 187 | space, "", qh->period, qh->phase, qh->load, |
| 188 | qh->iso_frame, qh->iso_packet_desc); |
| 189 | else if (qh->type == USB_ENDPOINT_XFER_INT) |
| 190 | out += sprintf(out, "%*s period %d phase %d load %d us\n", |
| 191 | space, "", qh->period, qh->phase, qh->load); |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 192 | if (out - buf > len) |
| 193 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 195 | if (element & UHCI_PTR_QH(uhci)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | out += sprintf(out, "%*s Element points to QH (bug?)\n", space, ""); |
| 197 | |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 198 | if (element & UHCI_PTR_DEPTH(uhci)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | out += sprintf(out, "%*s Depth traverse\n", space, ""); |
| 200 | |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 201 | if (element & cpu_to_hc32(uhci, 8)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | out += sprintf(out, "%*s Bit 3 set (bug?)\n", space, ""); |
| 203 | |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 204 | if (!(element & ~(UHCI_PTR_QH(uhci) | UHCI_PTR_DEPTH(uhci)))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | out += sprintf(out, "%*s Element is NULL (bug?)\n", space, ""); |
| 206 | |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 207 | if (out - buf > len) |
| 208 | goto done; |
| 209 | |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 210 | if (list_empty(&qh->queue)) { |
| 211 | out += sprintf(out, "%*s queue is empty\n", space, ""); |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 212 | if (qh == uhci->skel_async_qh) { |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 213 | out += uhci_show_td(uhci, uhci->term_td, out, |
Alan Stern | e009f1b | 2007-03-19 15:31:42 -0400 | [diff] [blame] | 214 | len - (out - buf), 0); |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 215 | if (out - buf > len) |
| 216 | goto tail; |
| 217 | } |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 218 | } else { |
| 219 | struct urb_priv *urbp = list_entry(qh->queue.next, |
| 220 | struct urb_priv, node); |
| 221 | struct uhci_td *td = list_entry(urbp->td_list.next, |
| 222 | struct uhci_td, list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 224 | if (element != LINK_TO_TD(uhci, td)) |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 225 | out += sprintf(out, "%*s Element != First TD\n", |
| 226 | space, ""); |
| 227 | i = nurbs = 0; |
| 228 | list_for_each_entry(urbp, &qh->queue, node) { |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 229 | if (++i <= 10) { |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 230 | out += uhci_show_urbp(uhci, urbp, out, |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 231 | len - (out - buf), space + 2); |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 232 | if (out - buf > len) |
| 233 | goto tail; |
| 234 | } |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 235 | else |
| 236 | ++nurbs; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | } |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 238 | if (nurbs > 0) |
| 239 | out += sprintf(out, "%*s Skipped %d URBs\n", |
| 240 | space, "", nurbs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | } |
| 242 | |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 243 | if (out - buf > len) |
| 244 | goto done; |
| 245 | |
Alan Stern | 85a975d | 2007-01-08 12:01:43 -0500 | [diff] [blame] | 246 | if (qh->dummy_td) { |
Alan Stern | af0bb59 | 2005-12-17 18:00:12 -0500 | [diff] [blame] | 247 | out += sprintf(out, "%*s Dummy TD\n", space, ""); |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 248 | out += uhci_show_td(uhci, qh->dummy_td, out, |
| 249 | len - (out - buf), 0); |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 250 | if (out - buf > len) |
| 251 | goto tail; |
Alan Stern | af0bb59 | 2005-12-17 18:00:12 -0500 | [diff] [blame] | 252 | } |
| 253 | |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 254 | done: |
| 255 | if (out - buf > len) |
| 256 | out += sprintf(out, " ...\n"); |
| 257 | tail: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | return out - buf; |
| 259 | } |
| 260 | |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 261 | static int uhci_show_sc(int port, unsigned short status, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | { |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 263 | return sprintf(buf, " stat%d = %04x %s%s%s%s%s%s%s%s%s%s\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | port, |
| 265 | status, |
| 266 | (status & USBPORTSC_SUSP) ? " Suspend" : "", |
| 267 | (status & USBPORTSC_OCC) ? " OverCurrentChange" : "", |
| 268 | (status & USBPORTSC_OC) ? " OverCurrent" : "", |
| 269 | (status & USBPORTSC_PR) ? " Reset" : "", |
| 270 | (status & USBPORTSC_LSDA) ? " LowSpeed" : "", |
| 271 | (status & USBPORTSC_RD) ? " ResumeDetect" : "", |
| 272 | (status & USBPORTSC_PEC) ? " EnableChange" : "", |
| 273 | (status & USBPORTSC_PE) ? " Enabled" : "", |
| 274 | (status & USBPORTSC_CSC) ? " ConnectChange" : "", |
| 275 | (status & USBPORTSC_CCS) ? " Connected" : ""); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | } |
| 277 | |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 278 | static int uhci_show_root_hub_state(struct uhci_hcd *uhci, char *buf) |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 279 | { |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 280 | char *rh_state; |
| 281 | |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 282 | switch (uhci->rh_state) { |
| 283 | case UHCI_RH_RESET: |
| 284 | rh_state = "reset"; break; |
| 285 | case UHCI_RH_SUSPENDED: |
| 286 | rh_state = "suspended"; break; |
| 287 | case UHCI_RH_AUTO_STOPPED: |
| 288 | rh_state = "auto-stopped"; break; |
| 289 | case UHCI_RH_RESUMING: |
| 290 | rh_state = "resuming"; break; |
| 291 | case UHCI_RH_SUSPENDING: |
| 292 | rh_state = "suspending"; break; |
| 293 | case UHCI_RH_RUNNING: |
| 294 | rh_state = "running"; break; |
| 295 | case UHCI_RH_RUNNING_NODEVS: |
| 296 | rh_state = "running, no devs"; break; |
| 297 | default: |
| 298 | rh_state = "?"; break; |
| 299 | } |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 300 | return sprintf(buf, "Root-hub state: %s FSBR: %d\n", |
Alan Stern | 84afddd | 2006-05-12 11:35:45 -0400 | [diff] [blame] | 301 | rh_state, uhci->fsbr_is_on); |
Alan Stern | c8f4fe4 | 2005-04-09 17:27:32 -0400 | [diff] [blame] | 302 | } |
| 303 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | static int uhci_show_status(struct uhci_hcd *uhci, char *buf, int len) |
| 305 | { |
| 306 | char *out = buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | unsigned short usbcmd, usbstat, usbint, usbfrnum; |
| 308 | unsigned int flbaseadd; |
| 309 | unsigned char sof; |
| 310 | unsigned short portsc1, portsc2; |
| 311 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | |
Deng-Cheng Zhu | f1125f8 | 2013-10-04 15:14:34 -0700 | [diff] [blame] | 313 | usbcmd = uhci_readw(uhci, USBCMD); |
| 314 | usbstat = uhci_readw(uhci, USBSTS); |
| 315 | usbint = uhci_readw(uhci, USBINTR); |
| 316 | usbfrnum = uhci_readw(uhci, USBFRNUM); |
| 317 | flbaseadd = uhci_readl(uhci, USBFLBASEADD); |
| 318 | sof = uhci_readb(uhci, USBSOF); |
| 319 | portsc1 = uhci_readw(uhci, USBPORTSC1); |
| 320 | portsc2 = uhci_readw(uhci, USBPORTSC2); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | |
| 322 | out += sprintf(out, " usbcmd = %04x %s%s%s%s%s%s%s%s\n", |
| 323 | usbcmd, |
| 324 | (usbcmd & USBCMD_MAXP) ? "Maxp64 " : "Maxp32 ", |
| 325 | (usbcmd & USBCMD_CF) ? "CF " : "", |
| 326 | (usbcmd & USBCMD_SWDBG) ? "SWDBG " : "", |
| 327 | (usbcmd & USBCMD_FGR) ? "FGR " : "", |
| 328 | (usbcmd & USBCMD_EGSM) ? "EGSM " : "", |
| 329 | (usbcmd & USBCMD_GRESET) ? "GRESET " : "", |
| 330 | (usbcmd & USBCMD_HCRESET) ? "HCRESET " : "", |
| 331 | (usbcmd & USBCMD_RS) ? "RS " : ""); |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 332 | if (out - buf > len) |
| 333 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | |
| 335 | out += sprintf(out, " usbstat = %04x %s%s%s%s%s%s\n", |
| 336 | usbstat, |
| 337 | (usbstat & USBSTS_HCH) ? "HCHalted " : "", |
| 338 | (usbstat & USBSTS_HCPE) ? "HostControllerProcessError " : "", |
| 339 | (usbstat & USBSTS_HSE) ? "HostSystemError " : "", |
| 340 | (usbstat & USBSTS_RD) ? "ResumeDetect " : "", |
| 341 | (usbstat & USBSTS_ERROR) ? "USBError " : "", |
| 342 | (usbstat & USBSTS_USBINT) ? "USBINT " : ""); |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 343 | if (out - buf > len) |
| 344 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | |
| 346 | out += sprintf(out, " usbint = %04x\n", usbint); |
| 347 | out += sprintf(out, " usbfrnum = (%d)%03x\n", (usbfrnum >> 10) & 1, |
| 348 | 0xfff & (4*(unsigned int)usbfrnum)); |
| 349 | out += sprintf(out, " flbaseadd = %08x\n", flbaseadd); |
| 350 | out += sprintf(out, " sof = %02x\n", sof); |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 351 | if (out - buf > len) |
| 352 | goto done; |
| 353 | |
| 354 | out += uhci_show_sc(1, portsc1, out); |
| 355 | if (out - buf > len) |
| 356 | goto done; |
| 357 | |
| 358 | out += uhci_show_sc(2, portsc2, out); |
| 359 | if (out - buf > len) |
| 360 | goto done; |
| 361 | |
| 362 | out += sprintf(out, |
| 363 | "Most recent frame: %x (%d) Last ISO frame: %x (%d)\n", |
Alan Stern | c8155cc | 2006-05-19 16:52:35 -0400 | [diff] [blame] | 364 | uhci->frame_number, uhci->frame_number & 1023, |
| 365 | uhci->last_iso_frame, uhci->last_iso_frame & 1023); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 367 | done: |
| 368 | if (out - buf > len) |
| 369 | out += sprintf(out, " ...\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | return out - buf; |
| 371 | } |
| 372 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | static int uhci_sprint_schedule(struct uhci_hcd *uhci, char *buf, int len) |
| 374 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | char *out = buf; |
| 376 | int i, j; |
| 377 | struct uhci_qh *qh; |
| 378 | struct uhci_td *td; |
| 379 | struct list_head *tmp, *head; |
Alan Stern | f3fe239 | 2007-01-08 12:00:28 -0500 | [diff] [blame] | 380 | int nframes, nerrs; |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 381 | __hc32 link; |
| 382 | __hc32 fsbr_link; |
Alan Stern | 17230ac | 2007-02-19 15:52:45 -0500 | [diff] [blame] | 383 | |
| 384 | static const char * const qh_names[] = { |
| 385 | "unlink", "iso", "int128", "int64", "int32", "int16", |
| 386 | "int8", "int4", "int2", "async", "term" |
| 387 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 389 | out += uhci_show_root_hub_state(uhci, out); |
| 390 | if (out - buf > len) |
| 391 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | out += sprintf(out, "HC status\n"); |
| 393 | out += uhci_show_status(uhci, out, len - (out - buf)); |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 394 | if (out - buf > len) |
| 395 | goto tail; |
Alan Stern | 3ca2a32 | 2007-01-16 11:56:32 -0500 | [diff] [blame] | 396 | |
| 397 | out += sprintf(out, "Periodic load table\n"); |
| 398 | for (i = 0; i < MAX_PHASE; ++i) { |
| 399 | out += sprintf(out, "\t%d", uhci->load[i]); |
| 400 | if (i % 8 == 7) |
| 401 | *out++ = '\n'; |
| 402 | } |
| 403 | out += sprintf(out, "Total: %d, #INT: %d, #ISO: %d\n", |
| 404 | uhci->total_load, |
| 405 | uhci_to_hcd(uhci)->self.bandwidth_int_reqs, |
| 406 | uhci_to_hcd(uhci)->self.bandwidth_isoc_reqs); |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 407 | if (debug <= 1) |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 408 | goto tail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | |
| 410 | out += sprintf(out, "Frame List\n"); |
Alan Stern | f3fe239 | 2007-01-08 12:00:28 -0500 | [diff] [blame] | 411 | nframes = 10; |
| 412 | nerrs = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | for (i = 0; i < UHCI_NUMFRAMES; ++i) { |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 414 | __hc32 qh_dma; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 416 | if (out - buf > len) |
| 417 | goto done; |
Alan Stern | f3fe239 | 2007-01-08 12:00:28 -0500 | [diff] [blame] | 418 | j = 0; |
| 419 | td = uhci->frame_cpu[i]; |
| 420 | link = uhci->frame[i]; |
| 421 | if (!td) |
| 422 | goto check_link; |
| 423 | |
| 424 | if (nframes > 0) { |
| 425 | out += sprintf(out, "- Frame %d -> (%08x)\n", |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 426 | i, hc32_to_cpu(uhci, link)); |
Alan Stern | f3fe239 | 2007-01-08 12:00:28 -0500 | [diff] [blame] | 427 | j = 1; |
| 428 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | |
| 430 | head = &td->fl_list; |
| 431 | tmp = head; |
| 432 | do { |
| 433 | td = list_entry(tmp, struct uhci_td, fl_list); |
| 434 | tmp = tmp->next; |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 435 | if (link != LINK_TO_TD(uhci, td)) { |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 436 | if (nframes > 0) { |
Chen Gang | 3171fca | 2013-01-24 09:41:45 +0800 | [diff] [blame] | 437 | out += sprintf(out, |
| 438 | " link does not match list entry!\n"); |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 439 | if (out - buf > len) |
| 440 | goto done; |
| 441 | } else |
Alan Stern | f3fe239 | 2007-01-08 12:00:28 -0500 | [diff] [blame] | 442 | ++nerrs; |
| 443 | } |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 444 | if (nframes > 0) { |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 445 | out += uhci_show_td(uhci, td, out, |
Alan Stern | f3fe239 | 2007-01-08 12:00:28 -0500 | [diff] [blame] | 446 | len - (out - buf), 4); |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 447 | if (out - buf > len) |
| 448 | goto tail; |
| 449 | } |
Alan Stern | f3fe239 | 2007-01-08 12:00:28 -0500 | [diff] [blame] | 450 | link = td->link; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | } while (tmp != head); |
Alan Stern | f3fe239 | 2007-01-08 12:00:28 -0500 | [diff] [blame] | 452 | |
| 453 | check_link: |
| 454 | qh_dma = uhci_frame_skel_link(uhci, i); |
| 455 | if (link != qh_dma) { |
| 456 | if (nframes > 0) { |
| 457 | if (!j) { |
| 458 | out += sprintf(out, |
| 459 | "- Frame %d -> (%08x)\n", |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 460 | i, hc32_to_cpu(uhci, link)); |
Alan Stern | f3fe239 | 2007-01-08 12:00:28 -0500 | [diff] [blame] | 461 | j = 1; |
| 462 | } |
Chen Gang | 3171fca | 2013-01-24 09:41:45 +0800 | [diff] [blame] | 463 | out += sprintf(out, |
| 464 | " link does not match QH (%08x)!\n", |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 465 | hc32_to_cpu(uhci, qh_dma)); |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 466 | if (out - buf > len) |
| 467 | goto done; |
Alan Stern | f3fe239 | 2007-01-08 12:00:28 -0500 | [diff] [blame] | 468 | } else |
| 469 | ++nerrs; |
| 470 | } |
| 471 | nframes -= j; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | } |
Alan Stern | f3fe239 | 2007-01-08 12:00:28 -0500 | [diff] [blame] | 473 | if (nerrs > 0) |
| 474 | out += sprintf(out, "Skipped %d bad links\n", nerrs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 475 | |
Alan Stern | 687f5f3 | 2005-11-30 17:16:19 -0500 | [diff] [blame] | 476 | out += sprintf(out, "Skeleton QHs\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 478 | if (out - buf > len) |
| 479 | goto done; |
| 480 | |
Alan Stern | e009f1b | 2007-03-19 15:31:42 -0400 | [diff] [blame] | 481 | fsbr_link = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | for (i = 0; i < UHCI_NUM_SKELQH; ++i) { |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 483 | int cnt = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | |
| 485 | qh = uhci->skelqh[i]; |
Chen Gang | 3171fca | 2013-01-24 09:41:45 +0800 | [diff] [blame] | 486 | out += sprintf(out, "- skel_%s_qh\n", qh_names[i]); |
Alan Stern | e009f1b | 2007-03-19 15:31:42 -0400 | [diff] [blame] | 487 | out += uhci_show_qh(uhci, qh, out, len - (out - buf), 4); |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 488 | if (out - buf > len) |
| 489 | goto tail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | |
| 491 | /* Last QH is the Terminating QH, it's different */ |
Alan Stern | 17230ac | 2007-02-19 15:52:45 -0500 | [diff] [blame] | 492 | if (i == SKEL_TERM) { |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 493 | if (qh_element(qh) != LINK_TO_TD(uhci, uhci->term_td)) { |
Chen Gang | 3171fca | 2013-01-24 09:41:45 +0800 | [diff] [blame] | 494 | out += sprintf(out, |
| 495 | " skel_term_qh element is not set to term_td!\n"); |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 496 | if (out - buf > len) |
| 497 | goto done; |
| 498 | } |
Alan Stern | e009f1b | 2007-03-19 15:31:42 -0400 | [diff] [blame] | 499 | link = fsbr_link; |
| 500 | if (!link) |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 501 | link = LINK_TO_QH(uhci, uhci->skel_term_qh); |
Alan Stern | e009f1b | 2007-03-19 15:31:42 -0400 | [diff] [blame] | 502 | goto check_qh_link; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | } |
| 504 | |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 505 | head = &qh->node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | tmp = head->next; |
| 507 | |
| 508 | while (tmp != head) { |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 509 | qh = list_entry(tmp, struct uhci_qh, node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | tmp = tmp->next; |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 511 | if (++cnt <= 10) { |
Alan Stern | e009f1b | 2007-03-19 15:31:42 -0400 | [diff] [blame] | 512 | out += uhci_show_qh(uhci, qh, out, |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 513 | len - (out - buf), 4); |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 514 | if (out - buf > len) |
| 515 | goto tail; |
| 516 | } |
Alan Stern | 17230ac | 2007-02-19 15:52:45 -0500 | [diff] [blame] | 517 | if (!fsbr_link && qh->skel >= SKEL_FSBR) |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 518 | fsbr_link = LINK_TO_QH(uhci, qh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | } |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 520 | if ((cnt -= 10) > 0) |
| 521 | out += sprintf(out, " Skipped %d QHs\n", cnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 523 | link = UHCI_PTR_TERM(uhci); |
Alan Stern | 17230ac | 2007-02-19 15:52:45 -0500 | [diff] [blame] | 524 | if (i <= SKEL_ISO) |
| 525 | ; |
| 526 | else if (i < SKEL_ASYNC) |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 527 | link = LINK_TO_QH(uhci, uhci->skel_async_qh); |
Alan Stern | 17230ac | 2007-02-19 15:52:45 -0500 | [diff] [blame] | 528 | else if (!uhci->fsbr_is_on) |
| 529 | ; |
Alan Stern | 17230ac | 2007-02-19 15:52:45 -0500 | [diff] [blame] | 530 | else |
Jan Andersson | 51e2f62 | 2011-05-18 10:44:51 +0200 | [diff] [blame] | 531 | link = LINK_TO_QH(uhci, uhci->skel_term_qh); |
Alan Stern | 17230ac | 2007-02-19 15:52:45 -0500 | [diff] [blame] | 532 | check_qh_link: |
| 533 | if (qh->link != link) |
Chen Gang | 3171fca | 2013-01-24 09:41:45 +0800 | [diff] [blame] | 534 | out += sprintf(out, |
| 535 | " last QH not linked to next skeleton!\n"); |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 536 | |
| 537 | if (out - buf > len) |
| 538 | goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | } |
| 540 | |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 541 | done: |
| 542 | if (out - buf > len) |
| 543 | out += sprintf(out, " ...\n"); |
| 544 | tail: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | return out - buf; |
| 546 | } |
| 547 | |
Alan Stern | 8d402e1 | 2005-12-17 18:03:37 -0500 | [diff] [blame] | 548 | #ifdef CONFIG_DEBUG_FS |
| 549 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | #define MAX_OUTPUT (64 * 1024) |
| 551 | |
| 552 | struct uhci_debug { |
| 553 | int size; |
| 554 | char *data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | }; |
| 556 | |
| 557 | static int uhci_debug_open(struct inode *inode, struct file *file) |
| 558 | { |
Theodore Ts'o | 8e18e29 | 2006-09-27 01:50:46 -0700 | [diff] [blame] | 559 | struct uhci_hcd *uhci = inode->i_private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | struct uhci_debug *up; |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 561 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | up = kmalloc(sizeof(*up), GFP_KERNEL); |
| 564 | if (!up) |
Andi Kleen | 00b81fb | 2010-06-01 23:04:43 +0200 | [diff] [blame] | 565 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | |
| 567 | up->data = kmalloc(MAX_OUTPUT, GFP_KERNEL); |
| 568 | if (!up->data) { |
| 569 | kfree(up); |
Andi Kleen | 00b81fb | 2010-06-01 23:04:43 +0200 | [diff] [blame] | 570 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | } |
| 572 | |
Alan Stern | 8d402e1 | 2005-12-17 18:03:37 -0500 | [diff] [blame] | 573 | up->size = 0; |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 574 | spin_lock_irqsave(&uhci->lock, flags); |
Alan Stern | 8d402e1 | 2005-12-17 18:03:37 -0500 | [diff] [blame] | 575 | if (uhci->is_initialized) |
Chen Gang | 13996ca | 2013-01-23 16:13:41 +0800 | [diff] [blame] | 576 | up->size = uhci_sprint_schedule(uhci, up->data, |
| 577 | MAX_OUTPUT - EXTRA_SPACE); |
Alan Stern | dccf4a4 | 2005-12-17 17:58:46 -0500 | [diff] [blame] | 578 | spin_unlock_irqrestore(&uhci->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | |
| 580 | file->private_data = up; |
| 581 | |
Andi Kleen | 00b81fb | 2010-06-01 23:04:43 +0200 | [diff] [blame] | 582 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | } |
| 584 | |
| 585 | static loff_t uhci_debug_lseek(struct file *file, loff_t off, int whence) |
| 586 | { |
Al Viro | b25472f | 2015-12-05 22:04:48 -0500 | [diff] [blame^] | 587 | struct uhci_debug *up = file->private_data; |
| 588 | return no_seek_end_llseek_size(file, off, whence, up->size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | } |
| 590 | |
| 591 | static ssize_t uhci_debug_read(struct file *file, char __user *buf, |
| 592 | size_t nbytes, loff_t *ppos) |
| 593 | { |
| 594 | struct uhci_debug *up = file->private_data; |
| 595 | return simple_read_from_buffer(buf, nbytes, ppos, up->data, up->size); |
| 596 | } |
| 597 | |
| 598 | static int uhci_debug_release(struct inode *inode, struct file *file) |
| 599 | { |
| 600 | struct uhci_debug *up = file->private_data; |
| 601 | |
| 602 | kfree(up->data); |
| 603 | kfree(up); |
| 604 | |
| 605 | return 0; |
| 606 | } |
| 607 | |
Luiz Fernando N. Capitulino | 066202d | 2006-08-05 20:37:11 -0300 | [diff] [blame] | 608 | static const struct file_operations uhci_debug_operations = { |
Alan Stern | 8d402e1 | 2005-12-17 18:03:37 -0500 | [diff] [blame] | 609 | .owner = THIS_MODULE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | .open = uhci_debug_open, |
| 611 | .llseek = uhci_debug_lseek, |
| 612 | .read = uhci_debug_read, |
| 613 | .release = uhci_debug_release, |
| 614 | }; |
Alan Stern | b409214 | 2010-08-05 13:12:14 -0400 | [diff] [blame] | 615 | #define UHCI_DEBUG_OPS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | |
Alan Stern | 8d402e1 | 2005-12-17 18:03:37 -0500 | [diff] [blame] | 617 | #endif /* CONFIG_DEBUG_FS */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | |
Oliver Neukum | 1c20163 | 2013-11-18 13:23:16 +0100 | [diff] [blame] | 619 | #else /* CONFIG_DYNAMIC_DEBUG*/ |
Alan Stern | 8d402e1 | 2005-12-17 18:03:37 -0500 | [diff] [blame] | 620 | |
| 621 | static inline void lprintk(char *buf) |
| 622 | {} |
| 623 | |
Alan Stern | e009f1b | 2007-03-19 15:31:42 -0400 | [diff] [blame] | 624 | static inline int uhci_show_qh(struct uhci_hcd *uhci, |
| 625 | struct uhci_qh *qh, char *buf, int len, int space) |
Alan Stern | 8d402e1 | 2005-12-17 18:03:37 -0500 | [diff] [blame] | 626 | { |
| 627 | return 0; |
| 628 | } |
| 629 | |
| 630 | static inline int uhci_sprint_schedule(struct uhci_hcd *uhci, |
| 631 | char *buf, int len) |
| 632 | { |
| 633 | return 0; |
| 634 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | |
| 636 | #endif |