mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-10-30 13:12:49 +02:00
a61f0baa4c
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@12239 3c298f89-4303-0410-b956-a3cf2f4a3e73
843 lines
20 KiB
C
843 lines
20 KiB
C
/*
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* ADM5120 HCD (Host Controller Driver) for USB
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*
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* Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org>
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*
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* This file was derived from: drivers/usb/host/ohci-dbg.c
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* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
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* (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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*/
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/*-------------------------------------------------------------------------*/
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static inline char *ed_typestring(int ed_type)
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{
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switch (ed_type) {
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case PIPE_CONTROL:
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return "ctrl";
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case PIPE_BULK:
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return "bulk";
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case PIPE_INTERRUPT:
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return "intr";
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case PIPE_ISOCHRONOUS:
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return "isoc";
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}
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return "(bad ed_type)";
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}
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static inline char *ed_statestring(int state)
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{
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switch (state) {
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case ED_IDLE:
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return "IDLE";
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case ED_UNLINK:
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return "UNLINK";
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case ED_OPER:
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return "OPER";
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}
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return "?STATE";
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}
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static inline char *pipestring(int pipe)
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{
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return ed_typestring(usb_pipetype(pipe));
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}
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static inline char *td_pidstring(u32 info)
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{
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switch (info & TD_DP) {
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case TD_DP_SETUP:
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return "SETUP";
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case TD_DP_IN:
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return "IN";
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case TD_DP_OUT:
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return "OUT";
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}
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return "?PID";
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}
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static inline char *td_togglestring(u32 info)
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{
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switch (info & TD_T) {
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case TD_T_DATA0:
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return "DATA0";
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case TD_T_DATA1:
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return "DATA1";
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case TD_T_CARRY:
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return "CARRY";
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}
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return "?TOGGLE";
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}
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/*-------------------------------------------------------------------------*/
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#ifdef DEBUG
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/* debug| print the main components of an URB
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* small: 0) header + data packets 1) just header
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*/
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static void __attribute__((unused))
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urb_print(struct admhcd *ahcd, struct urb *urb, char *str, int small, int status)
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{
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unsigned int pipe = urb->pipe;
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if (!urb->dev || !urb->dev->bus) {
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admhc_dbg(ahcd, "%s URB: no dev", str);
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return;
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}
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#ifndef ADMHC_VERBOSE_DEBUG
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if (status != 0)
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#endif
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admhc_dbg(ahcd, "URB-%s %p dev=%d ep=%d%s-%s flags=%x len=%d/%d "
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"stat=%d\n",
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str,
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urb,
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usb_pipedevice (pipe),
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usb_pipeendpoint (pipe),
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usb_pipeout(pipe)? "out" : "in",
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pipestring(pipe),
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urb->transfer_flags,
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urb->actual_length,
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urb->transfer_buffer_length,
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status);
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#ifdef ADMHC_VERBOSE_DEBUG
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if (!small) {
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int i, len;
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if (usb_pipecontrol(pipe)) {
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admhc_dbg(ahcd, "setup(8):");
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for (i = 0; i < 8 ; i++)
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printk (" %02x", ((__u8 *) urb->setup_packet) [i]);
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printk ("\n");
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}
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if (urb->transfer_buffer_length > 0 && urb->transfer_buffer) {
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admhc_dbg(ahcd, "data(%d/%d):",
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urb->actual_length,
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urb->transfer_buffer_length);
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len = usb_pipeout(pipe)?
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urb->transfer_buffer_length: urb->actual_length;
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for (i = 0; i < 16 && i < len; i++)
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printk(" %02x", ((__u8 *)urb->transfer_buffer)[i]);
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printk("%s stat:%d\n", i < len? "...": "", status);
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}
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}
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#endif /* ADMHC_VERBOSE_DEBUG */
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}
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#define admhc_dbg_sw(ahcd, next, size, format, arg...) \
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do { \
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if (next) { \
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unsigned s_len; \
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s_len = scnprintf(*next, *size, format, ## arg ); \
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*size -= s_len; *next += s_len; \
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} else \
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admhc_dbg(ahcd,format, ## arg ); \
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} while (0);
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static void admhc_dump_intr_mask(struct admhcd *ahcd, char *label, u32 mask,
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char **next, unsigned *size)
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{
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admhc_dbg_sw(ahcd, next, size, "%s 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n",
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label,
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mask,
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(mask & ADMHC_INTR_INTA) ? " INTA" : "",
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(mask & ADMHC_INTR_FATI) ? " FATI" : "",
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(mask & ADMHC_INTR_SWI) ? " SWI" : "",
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(mask & ADMHC_INTR_TDC) ? " TDC" : "",
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(mask & ADMHC_INTR_FNO) ? " FNO" : "",
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(mask & ADMHC_INTR_SO) ? " SO" : "",
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(mask & ADMHC_INTR_INSM) ? " INSM" : "",
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(mask & ADMHC_INTR_BABI) ? " BABI" : "",
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(mask & ADMHC_INTR_7) ? " !7!" : "",
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(mask & ADMHC_INTR_6) ? " !6!" : "",
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(mask & ADMHC_INTR_RESI) ? " RESI" : "",
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(mask & ADMHC_INTR_SOFI) ? " SOFI" : ""
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);
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}
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static void maybe_print_eds(struct admhcd *ahcd, char *label, u32 value,
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char **next, unsigned *size)
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{
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if (value)
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admhc_dbg_sw(ahcd, next, size, "%s %08x\n", label, value);
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}
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static char *buss2string (int state)
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{
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switch (state) {
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case ADMHC_BUSS_RESET:
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return "reset";
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case ADMHC_BUSS_RESUME:
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return "resume";
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case ADMHC_BUSS_OPER:
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return "operational";
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case ADMHC_BUSS_SUSPEND:
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return "suspend";
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}
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return "?state";
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}
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static void
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admhc_dump_status(struct admhcd *ahcd, char **next, unsigned *size)
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{
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struct admhcd_regs __iomem *regs = ahcd->regs;
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u32 temp;
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temp = admhc_readl(ahcd, ®s->gencontrol);
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admhc_dbg_sw(ahcd, next, size,
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"gencontrol 0x%08x%s%s%s%s\n",
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temp,
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(temp & ADMHC_CTRL_UHFE) ? " UHFE" : "",
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(temp & ADMHC_CTRL_SIR) ? " SIR" : "",
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(temp & ADMHC_CTRL_DMAA) ? " DMAA" : "",
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(temp & ADMHC_CTRL_SR) ? " SR" : ""
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);
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temp = admhc_readl(ahcd, ®s->host_control);
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admhc_dbg_sw(ahcd, next, size,
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"host_control 0x%08x BUSS=%s%s\n",
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temp,
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buss2string(temp & ADMHC_HC_BUSS),
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(temp & ADMHC_HC_DMAE) ? " DMAE" : ""
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);
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admhc_dump_intr_mask(ahcd, "int_status",
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admhc_readl(ahcd, ®s->int_status),
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next, size);
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admhc_dump_intr_mask(ahcd, "int_enable",
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admhc_readl(ahcd, ®s->int_enable),
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next, size);
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maybe_print_eds(ahcd, "hosthead",
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admhc_readl(ahcd, ®s->hosthead), next, size);
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}
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#define dbg_port_sw(hc,num,value,next,size) \
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admhc_dbg_sw(hc, next, size, \
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"portstatus [%d] " \
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"0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \
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num, temp, \
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(temp & ADMHC_PS_PRSC) ? " PRSC" : "", \
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(temp & ADMHC_PS_OCIC) ? " OCIC" : "", \
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(temp & ADMHC_PS_PSSC) ? " PSSC" : "", \
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(temp & ADMHC_PS_PESC) ? " PESC" : "", \
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(temp & ADMHC_PS_CSC) ? " CSC" : "", \
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\
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(temp & ADMHC_PS_LSDA) ? " LSDA" : "", \
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(temp & ADMHC_PS_PPS) ? " PPS" : "", \
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(temp & ADMHC_PS_PRS) ? " PRS" : "", \
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(temp & ADMHC_PS_POCI) ? " POCI" : "", \
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(temp & ADMHC_PS_PSS) ? " PSS" : "", \
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\
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(temp & ADMHC_PS_PES) ? " PES" : "", \
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(temp & ADMHC_PS_CCS) ? " CCS" : "" \
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);
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static void
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admhc_dump_roothub(
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struct admhcd *ahcd,
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int verbose,
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char **next,
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unsigned *size)
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{
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u32 temp, i;
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temp = admhc_read_rhdesc(ahcd);
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if (temp == ~(u32)0)
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return;
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if (verbose) {
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admhc_dbg_sw(ahcd, next, size,
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"rhdesc %08x%s%s%s%s%s%s PPCM=%02x%s%s%s%s NUMP=%d(%d)\n",
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temp,
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(temp & ADMHC_RH_CRWE) ? " CRWE" : "",
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(temp & ADMHC_RH_OCIC) ? " OCIC" : "",
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(temp & ADMHC_RH_LPSC) ? " LPSC" : "",
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(temp & ADMHC_RH_LPSC) ? " DRWE" : "",
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(temp & ADMHC_RH_LPSC) ? " OCI" : "",
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(temp & ADMHC_RH_LPSC) ? " LPS" : "",
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((temp & ADMHC_RH_PPCM) >> 16),
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(temp & ADMHC_RH_NOCP) ? " NOCP" : "",
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(temp & ADMHC_RH_OCPM) ? " OCPM" : "",
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(temp & ADMHC_RH_NPS) ? " NPS" : "",
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(temp & ADMHC_RH_PSM) ? " PSM" : "",
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(temp & ADMHC_RH_NUMP), ahcd->num_ports
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);
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}
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for (i = 0; i < ahcd->num_ports; i++) {
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temp = admhc_read_portstatus(ahcd, i);
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dbg_port_sw(ahcd, i, temp, next, size);
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}
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}
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static void admhc_dump(struct admhcd *ahcd, int verbose)
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{
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admhc_dbg(ahcd, "ADMHC ahcd state\n");
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/* dumps some of the state we know about */
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admhc_dump_status(ahcd, NULL, NULL);
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admhc_dbg(ahcd,"current frame #%04x\n",
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admhc_frame_no(ahcd));
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admhc_dump_roothub(ahcd, verbose, NULL, NULL);
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}
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static const char data0[] = "DATA0";
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static const char data1[] = "DATA1";
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static void admhc_dump_td(const struct admhcd *ahcd, const char *label,
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const struct td *td)
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{
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u32 tmp;
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admhc_dbg(ahcd, "%s td %p; urb %p index %d; hwNextTD %08x\n",
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label, td,
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td->urb, td->index,
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hc32_to_cpup(ahcd, &td->hwNextTD));
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tmp = hc32_to_cpup(ahcd, &td->hwINFO);
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admhc_dbg(ahcd, " status %08x%s CC=%x EC=%d %s %s ISI=%x FN=%x\n",
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tmp,
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(tmp & TD_OWN) ? " OWN" : "",
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TD_CC_GET(tmp),
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TD_EC_GET(tmp),
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td_togglestring(tmp),
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td_pidstring(tmp),
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TD_ISI_GET(tmp),
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TD_FN_GET(tmp));
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tmp = hc32_to_cpup(ahcd, &td->hwCBL);
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admhc_dbg(ahcd, " dbp %08x; cbl %08x; LEN=%d%s\n",
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hc32_to_cpup(ahcd, &td->hwDBP),
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tmp,
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TD_BL_GET(tmp),
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(tmp & TD_IE) ? " IE" : "");
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}
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/* caller MUST own hcd spinlock if verbose is set! */
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static void __attribute__((unused))
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admhc_dump_ed(const struct admhcd *ahcd, const char *label,
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const struct ed *ed, int verbose)
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{
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u32 tmp = hc32_to_cpu(ahcd, ed->hwINFO);
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admhc_dbg(ahcd, "%s ed %p %s type %s; next ed %08x\n",
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label,
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ed, ed_statestring(ed->state), ed_typestring(ed->type),
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hc32_to_cpup(ahcd, &ed->hwNextED));
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admhc_dbg(ahcd, " info %08x MAX=%d%s%s%s%s EP=%d DEV=%d\n", tmp,
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ED_MPS_GET(tmp),
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(tmp & ED_ISO) ? " ISO" : "",
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(tmp & ED_SKIP) ? " SKIP" : "",
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(tmp & ED_SPEED_FULL) ? " FULL" : " LOW",
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(tmp & ED_INT) ? " INT" : "",
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ED_EN_GET(tmp),
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ED_FA_GET(tmp));
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tmp = hc32_to_cpup(ahcd, &ed->hwHeadP);
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admhc_dbg(ahcd, " tds: head %08x tail %08x %s%s%s\n",
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tmp & TD_MASK,
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hc32_to_cpup (ahcd, &ed->hwTailP),
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(tmp & ED_C) ? data1 : data0,
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(tmp & ED_H) ? " HALT" : "",
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verbose ? " td list follows" : " (not listing)");
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if (verbose) {
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struct list_head *tmp;
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/* use ed->td_list because HC concurrently modifies
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* hwNextTD as it accumulates ed_donelist.
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*/
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list_for_each(tmp, &ed->td_list) {
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struct td *td;
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td = list_entry(tmp, struct td, td_list);
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admhc_dump_td (ahcd, " ->", td);
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}
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}
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}
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#else /* ifdef DEBUG */
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static inline void urb_print(struct admhcd *ahcd, struct urb * urb, char * str,
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int small) {}
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static inline void admhc_dump_ed(const struct admhcd *ahcd, const char *label,
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const struct ed *ed, int verbose) {}
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static inline void admhc_dump_td(const struct admhcd *ahcd, const char *label,
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const struct td *td) {}
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static inline void admhc_dump(struct admhcd *ahcd, int verbose) {}
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#undef ADMHC_VERBOSE_DEBUG
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#endif /* DEBUG */
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/*-------------------------------------------------------------------------*/
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#ifdef STUB_DEBUG_FILES
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static inline void create_debug_files(struct admhcd *bus) { }
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static inline void remove_debug_files(struct admhcd *bus) { }
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#else
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static int debug_async_open(struct inode *, struct file *);
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static int debug_periodic_open(struct inode *, struct file *);
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static int debug_registers_open(struct inode *, struct file *);
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static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*);
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static int debug_close(struct inode *, struct file *);
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static const struct file_operations debug_async_fops = {
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.owner = THIS_MODULE,
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.open = debug_async_open,
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.read = debug_output,
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.release = debug_close,
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};
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static const struct file_operations debug_periodic_fops = {
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.owner = THIS_MODULE,
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.open = debug_periodic_open,
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.read = debug_output,
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.release = debug_close,
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};
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static const struct file_operations debug_registers_fops = {
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.owner = THIS_MODULE,
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.open = debug_registers_open,
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.read = debug_output,
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.release = debug_close,
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};
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static struct dentry *admhc_debug_root;
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struct debug_buffer {
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ssize_t (*fill_func)(struct debug_buffer *); /* fill method */
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struct device *dev;
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struct mutex mutex; /* protect filling of buffer */
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size_t count; /* number of characters filled into buffer */
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char *page;
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};
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static ssize_t
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show_list(struct admhcd *ahcd, char *buf, size_t count, struct ed *ed)
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{
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unsigned temp;
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unsigned size = count;
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if (!ed)
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return 0;
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/* dump a snapshot of the bulk or control schedule */
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while (ed) {
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u32 info = hc32_to_cpu(ahcd, ed->hwINFO);
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u32 headp = hc32_to_cpu(ahcd, ed->hwHeadP);
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u32 tailp = hc32_to_cpu(ahcd, ed->hwTailP);
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struct list_head *entry;
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struct td *td;
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temp = scnprintf(buf, size,
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"ed/%p %s %s %cs dev%d ep%d %s%smax %d %08x%s%s %s"
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" h:%08x t:%08x",
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ed,
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ed_statestring(ed->state),
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ed_typestring (ed->type),
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(info & ED_SPEED_FULL) ? 'f' : 'l',
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info & ED_FA_MASK,
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(info >> ED_EN_SHIFT) & ED_EN_MASK,
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(info & ED_INT) ? "INT " : "",
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(info & ED_ISO) ? "ISO " : "",
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(info >> ED_MPS_SHIFT) & ED_MPS_MASK ,
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info,
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(info & ED_SKIP) ? " S" : "",
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(headp & ED_H) ? " H" : "",
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(headp & ED_C) ? data1 : data0,
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headp & ED_MASK,tailp);
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size -= temp;
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buf += temp;
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list_for_each(entry, &ed->td_list) {
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u32 dbp, cbl;
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td = list_entry(entry, struct td, td_list);
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info = hc32_to_cpup (ahcd, &td->hwINFO);
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dbp = hc32_to_cpup (ahcd, &td->hwDBP);
|
|
cbl = hc32_to_cpup (ahcd, &td->hwCBL);
|
|
|
|
temp = scnprintf(buf, size,
|
|
"\n\ttd/%p %s %d %s%scc=%x urb %p (%08x,%08x)",
|
|
td,
|
|
td_pidstring(info),
|
|
TD_BL_GET(cbl),
|
|
(info & TD_OWN) ? "" : "DONE ",
|
|
(cbl & TD_IE) ? "IE " : "",
|
|
TD_CC_GET (info), td->urb, info, cbl);
|
|
size -= temp;
|
|
buf += temp;
|
|
}
|
|
|
|
temp = scnprintf(buf, size, "\n");
|
|
size -= temp;
|
|
buf += temp;
|
|
|
|
ed = ed->ed_next;
|
|
}
|
|
|
|
return count - size;
|
|
}
|
|
|
|
static ssize_t fill_async_buffer(struct debug_buffer *buf)
|
|
{
|
|
struct usb_bus *bus;
|
|
struct usb_hcd *hcd;
|
|
struct admhcd *ahcd;
|
|
size_t temp;
|
|
unsigned long flags;
|
|
|
|
bus = dev_get_drvdata(buf->dev);
|
|
hcd = bus_to_hcd(bus);
|
|
ahcd = hcd_to_admhcd(hcd);
|
|
|
|
spin_lock_irqsave(&ahcd->lock, flags);
|
|
temp = show_list(ahcd, buf->page, PAGE_SIZE, ahcd->ed_head);
|
|
spin_unlock_irqrestore(&ahcd->lock, flags);
|
|
|
|
return temp;
|
|
}
|
|
|
|
|
|
#define DBG_SCHED_LIMIT 64
|
|
|
|
static ssize_t fill_periodic_buffer(struct debug_buffer *buf)
|
|
{
|
|
struct usb_bus *bus;
|
|
struct usb_hcd *hcd;
|
|
struct admhcd *ahcd;
|
|
struct ed **seen, *ed;
|
|
unsigned long flags;
|
|
unsigned temp, size, seen_count;
|
|
char *next;
|
|
unsigned i;
|
|
|
|
if (!(seen = kmalloc(DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC)))
|
|
return 0;
|
|
seen_count = 0;
|
|
|
|
bus = dev_get_drvdata(buf->dev);
|
|
hcd = bus_to_hcd(bus);
|
|
ahcd = hcd_to_admhcd(hcd);
|
|
next = buf->page;
|
|
size = PAGE_SIZE;
|
|
|
|
temp = scnprintf(next, size, "size = %d\n", NUM_INTS);
|
|
size -= temp;
|
|
next += temp;
|
|
|
|
/* dump a snapshot of the periodic schedule (and load) */
|
|
spin_lock_irqsave(&ahcd->lock, flags);
|
|
for (i = 0; i < NUM_INTS; i++) {
|
|
if (!(ed = ahcd->periodic [i]))
|
|
continue;
|
|
|
|
temp = scnprintf(next, size, "%2d [%3d]:", i, ahcd->load [i]);
|
|
size -= temp;
|
|
next += temp;
|
|
|
|
do {
|
|
temp = scnprintf(next, size, " ed%d/%p",
|
|
ed->interval, ed);
|
|
size -= temp;
|
|
next += temp;
|
|
for (temp = 0; temp < seen_count; temp++) {
|
|
if (seen [temp] == ed)
|
|
break;
|
|
}
|
|
|
|
/* show more info the first time around */
|
|
if (temp == seen_count) {
|
|
u32 info = hc32_to_cpu (ahcd, ed->hwINFO);
|
|
struct list_head *entry;
|
|
unsigned qlen = 0;
|
|
|
|
/* qlen measured here in TDs, not urbs */
|
|
list_for_each (entry, &ed->td_list)
|
|
qlen++;
|
|
temp = scnprintf(next, size,
|
|
" (%cs dev%d ep%d%s qlen %u"
|
|
" max %d %08x%s%s)",
|
|
(info & ED_SPEED_FULL) ? 'f' : 'l',
|
|
ED_FA_GET(info),
|
|
ED_EN_GET(info),
|
|
(info & ED_ISO) ? "iso" : "int",
|
|
qlen,
|
|
ED_MPS_GET(info),
|
|
info,
|
|
(info & ED_SKIP) ? " K" : "",
|
|
(ed->hwHeadP &
|
|
cpu_to_hc32(ahcd, ED_H)) ?
|
|
" H" : "");
|
|
size -= temp;
|
|
next += temp;
|
|
|
|
if (seen_count < DBG_SCHED_LIMIT)
|
|
seen [seen_count++] = ed;
|
|
|
|
ed = ed->ed_next;
|
|
|
|
} else {
|
|
/* we've seen it and what's after */
|
|
temp = 0;
|
|
ed = NULL;
|
|
}
|
|
|
|
} while (ed);
|
|
|
|
temp = scnprintf(next, size, "\n");
|
|
size -= temp;
|
|
next += temp;
|
|
}
|
|
spin_unlock_irqrestore(&ahcd->lock, flags);
|
|
kfree (seen);
|
|
|
|
return PAGE_SIZE - size;
|
|
}
|
|
|
|
|
|
#undef DBG_SCHED_LIMIT
|
|
|
|
static ssize_t fill_registers_buffer(struct debug_buffer *buf)
|
|
{
|
|
struct usb_bus *bus;
|
|
struct usb_hcd *hcd;
|
|
struct admhcd *ahcd;
|
|
struct admhcd_regs __iomem *regs;
|
|
unsigned long flags;
|
|
unsigned temp, size;
|
|
char *next;
|
|
u32 rdata;
|
|
|
|
bus = dev_get_drvdata(buf->dev);
|
|
hcd = bus_to_hcd(bus);
|
|
ahcd = hcd_to_admhcd(hcd);
|
|
regs = ahcd->regs;
|
|
next = buf->page;
|
|
size = PAGE_SIZE;
|
|
|
|
spin_lock_irqsave(&ahcd->lock, flags);
|
|
|
|
/* dump driver info, then registers in spec order */
|
|
|
|
admhc_dbg_sw(ahcd, &next, &size,
|
|
"bus %s, device %s\n"
|
|
"%s\n"
|
|
"%s version " DRIVER_VERSION "\n",
|
|
hcd->self.controller->bus->name,
|
|
hcd->self.controller->bus_id,
|
|
hcd->product_desc,
|
|
hcd_name);
|
|
|
|
if (bus->controller->power.power_state.event) {
|
|
size -= scnprintf(next, size,
|
|
"SUSPENDED (no register access)\n");
|
|
goto done;
|
|
}
|
|
|
|
admhc_dump_status(ahcd, &next, &size);
|
|
|
|
/* other registers mostly affect frame timings */
|
|
rdata = admhc_readl(ahcd, ®s->fminterval);
|
|
temp = scnprintf(next, size,
|
|
"fmintvl 0x%08x %sFSLDP=0x%04x FI=0x%04x\n",
|
|
rdata, (rdata & ADMHC_SFI_FIT) ? "FIT " : "",
|
|
(rdata >> ADMHC_SFI_FSLDP_SHIFT) & ADMHC_SFI_FSLDP_MASK,
|
|
rdata & ADMHC_SFI_FI_MASK);
|
|
size -= temp;
|
|
next += temp;
|
|
|
|
rdata = admhc_readl(ahcd, ®s->fmnumber);
|
|
temp = scnprintf(next, size, "fmnumber 0x%08x %sFR=0x%04x FN=%04x\n",
|
|
rdata, (rdata & ADMHC_SFN_FRT) ? "FRT " : "",
|
|
(rdata >> ADMHC_SFN_FR_SHIFT) & ADMHC_SFN_FR_MASK,
|
|
rdata & ADMHC_SFN_FN_MASK);
|
|
size -= temp;
|
|
next += temp;
|
|
|
|
/* TODO: use predefined bitmask */
|
|
rdata = admhc_readl(ahcd, ®s->lsthresh);
|
|
temp = scnprintf(next, size, "lsthresh 0x%04x\n",
|
|
rdata & 0x3fff);
|
|
size -= temp;
|
|
next += temp;
|
|
|
|
temp = scnprintf(next, size, "hub poll timer: %s\n",
|
|
admhcd_to_hcd(ahcd)->poll_rh ? "ON" : "OFF");
|
|
size -= temp;
|
|
next += temp;
|
|
|
|
/* roothub */
|
|
admhc_dump_roothub(ahcd, 1, &next, &size);
|
|
|
|
done:
|
|
spin_unlock_irqrestore(&ahcd->lock, flags);
|
|
return PAGE_SIZE - size;
|
|
}
|
|
|
|
|
|
static struct debug_buffer *alloc_buffer(struct device *dev,
|
|
ssize_t (*fill_func)(struct debug_buffer *))
|
|
{
|
|
struct debug_buffer *buf;
|
|
|
|
buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL);
|
|
|
|
if (buf) {
|
|
buf->dev = dev;
|
|
buf->fill_func = fill_func;
|
|
mutex_init(&buf->mutex);
|
|
}
|
|
|
|
return buf;
|
|
}
|
|
|
|
static int fill_buffer(struct debug_buffer *buf)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (!buf->page)
|
|
buf->page = (char *)get_zeroed_page(GFP_KERNEL);
|
|
|
|
if (!buf->page) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
ret = buf->fill_func(buf);
|
|
|
|
if (ret >= 0) {
|
|
buf->count = ret;
|
|
ret = 0;
|
|
}
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t debug_output(struct file *file, char __user *user_buf,
|
|
size_t len, loff_t *offset)
|
|
{
|
|
struct debug_buffer *buf = file->private_data;
|
|
int ret = 0;
|
|
|
|
mutex_lock(&buf->mutex);
|
|
if (buf->count == 0) {
|
|
ret = fill_buffer(buf);
|
|
if (ret != 0) {
|
|
mutex_unlock(&buf->mutex);
|
|
goto out;
|
|
}
|
|
}
|
|
mutex_unlock(&buf->mutex);
|
|
|
|
ret = simple_read_from_buffer(user_buf, len, offset,
|
|
buf->page, buf->count);
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int debug_close(struct inode *inode, struct file *file)
|
|
{
|
|
struct debug_buffer *buf = file->private_data;
|
|
|
|
if (buf) {
|
|
if (buf->page)
|
|
free_page((unsigned long)buf->page);
|
|
kfree(buf);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int debug_async_open(struct inode *inode, struct file *file)
|
|
{
|
|
file->private_data = alloc_buffer(inode->i_private, fill_async_buffer);
|
|
|
|
return file->private_data ? 0 : -ENOMEM;
|
|
}
|
|
|
|
static int debug_periodic_open(struct inode *inode, struct file *file)
|
|
{
|
|
file->private_data = alloc_buffer(inode->i_private,
|
|
fill_periodic_buffer);
|
|
|
|
return file->private_data ? 0 : -ENOMEM;
|
|
}
|
|
|
|
static int debug_registers_open(struct inode *inode, struct file *file)
|
|
{
|
|
file->private_data = alloc_buffer(inode->i_private,
|
|
fill_registers_buffer);
|
|
|
|
return file->private_data ? 0 : -ENOMEM;
|
|
}
|
|
|
|
static inline void create_debug_files(struct admhcd *ahcd)
|
|
{
|
|
struct usb_bus *bus = &admhcd_to_hcd(ahcd)->self;
|
|
struct device *dev = bus->dev;
|
|
|
|
ahcd->debug_dir = debugfs_create_dir(bus->bus_name, admhc_debug_root);
|
|
if (!ahcd->debug_dir)
|
|
goto dir_error;
|
|
|
|
ahcd->debug_async = debugfs_create_file("async", S_IRUGO,
|
|
ahcd->debug_dir, dev,
|
|
&debug_async_fops);
|
|
if (!ahcd->debug_async)
|
|
goto async_error;
|
|
|
|
ahcd->debug_periodic = debugfs_create_file("periodic", S_IRUGO,
|
|
ahcd->debug_dir, dev,
|
|
&debug_periodic_fops);
|
|
if (!ahcd->debug_periodic)
|
|
goto periodic_error;
|
|
|
|
ahcd->debug_registers = debugfs_create_file("registers", S_IRUGO,
|
|
ahcd->debug_dir, dev,
|
|
&debug_registers_fops);
|
|
if (!ahcd->debug_registers)
|
|
goto registers_error;
|
|
|
|
admhc_dbg(ahcd, "created debug files\n");
|
|
return;
|
|
|
|
registers_error:
|
|
debugfs_remove(ahcd->debug_periodic);
|
|
periodic_error:
|
|
debugfs_remove(ahcd->debug_async);
|
|
async_error:
|
|
debugfs_remove(ahcd->debug_dir);
|
|
dir_error:
|
|
ahcd->debug_periodic = NULL;
|
|
ahcd->debug_async = NULL;
|
|
ahcd->debug_dir = NULL;
|
|
}
|
|
|
|
static inline void remove_debug_files(struct admhcd *ahcd)
|
|
{
|
|
debugfs_remove(ahcd->debug_registers);
|
|
debugfs_remove(ahcd->debug_periodic);
|
|
debugfs_remove(ahcd->debug_async);
|
|
debugfs_remove(ahcd->debug_dir);
|
|
}
|
|
|
|
#endif
|
|
|
|
/*-------------------------------------------------------------------------*/
|