[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/usb/host/ohci-dbg.c b/src/kernel/linux/v4.14/drivers/usb/host/ohci-dbg.c
new file mode 100644
index 0000000..c3eded3
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/usb/host/ohci-dbg.c
@@ -0,0 +1,811 @@
+/*
+ * OHCI HCD (Host Controller Driver) for USB.
+ *
+ * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
+ * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
+ *
+ * This file is licenced under the GPL.
+ */
+
+/*-------------------------------------------------------------------------*/
+
+#define edstring(ed_type) ({ char *temp; \
+ switch (ed_type) { \
+ case PIPE_CONTROL: temp = "ctrl"; break; \
+ case PIPE_BULK: temp = "bulk"; break; \
+ case PIPE_INTERRUPT: temp = "intr"; break; \
+ default: temp = "isoc"; break; \
+ } temp;})
+#define pipestring(pipe) edstring(usb_pipetype(pipe))
+
+
+#define ohci_dbg_sw(ohci, next, size, format, arg...) \
+ do { \
+ if (next != NULL) { \
+ unsigned s_len; \
+ s_len = scnprintf (*next, *size, format, ## arg ); \
+ *size -= s_len; *next += s_len; \
+ } else \
+ ohci_dbg(ohci,format, ## arg ); \
+ } while (0);
+
+/* Version for use where "next" is the address of a local variable */
+#define ohci_dbg_nosw(ohci, next, size, format, arg...) \
+ do { \
+ unsigned s_len; \
+ s_len = scnprintf(*next, *size, format, ## arg); \
+ *size -= s_len; *next += s_len; \
+ } while (0);
+
+
+static void ohci_dump_intr_mask (
+ struct ohci_hcd *ohci,
+ char *label,
+ u32 mask,
+ char **next,
+ unsigned *size)
+{
+ ohci_dbg_sw (ohci, next, size, "%s 0x%08x%s%s%s%s%s%s%s%s%s\n",
+ label,
+ mask,
+ (mask & OHCI_INTR_MIE) ? " MIE" : "",
+ (mask & OHCI_INTR_OC) ? " OC" : "",
+ (mask & OHCI_INTR_RHSC) ? " RHSC" : "",
+ (mask & OHCI_INTR_FNO) ? " FNO" : "",
+ (mask & OHCI_INTR_UE) ? " UE" : "",
+ (mask & OHCI_INTR_RD) ? " RD" : "",
+ (mask & OHCI_INTR_SF) ? " SF" : "",
+ (mask & OHCI_INTR_WDH) ? " WDH" : "",
+ (mask & OHCI_INTR_SO) ? " SO" : ""
+ );
+}
+
+static void maybe_print_eds (
+ struct ohci_hcd *ohci,
+ char *label,
+ u32 value,
+ char **next,
+ unsigned *size)
+{
+ if (value)
+ ohci_dbg_sw (ohci, next, size, "%s %08x\n", label, value);
+}
+
+static char *hcfs2string (int state)
+{
+ switch (state) {
+ case OHCI_USB_RESET: return "reset";
+ case OHCI_USB_RESUME: return "resume";
+ case OHCI_USB_OPER: return "operational";
+ case OHCI_USB_SUSPEND: return "suspend";
+ }
+ return "?";
+}
+
+static const char *rh_state_string(struct ohci_hcd *ohci)
+{
+ switch (ohci->rh_state) {
+ case OHCI_RH_HALTED:
+ return "halted";
+ case OHCI_RH_SUSPENDED:
+ return "suspended";
+ case OHCI_RH_RUNNING:
+ return "running";
+ }
+ return "?";
+}
+
+// dump control and status registers
+static void
+ohci_dump_status (struct ohci_hcd *controller, char **next, unsigned *size)
+{
+ struct ohci_regs __iomem *regs = controller->regs;
+ u32 temp;
+
+ temp = ohci_readl (controller, ®s->revision) & 0xff;
+ ohci_dbg_sw (controller, next, size,
+ "OHCI %d.%d, %s legacy support registers, rh state %s\n",
+ 0x03 & (temp >> 4), (temp & 0x0f),
+ (temp & 0x0100) ? "with" : "NO",
+ rh_state_string(controller));
+
+ temp = ohci_readl (controller, ®s->control);
+ ohci_dbg_sw (controller, next, size,
+ "control 0x%03x%s%s%s HCFS=%s%s%s%s%s CBSR=%d\n",
+ temp,
+ (temp & OHCI_CTRL_RWE) ? " RWE" : "",
+ (temp & OHCI_CTRL_RWC) ? " RWC" : "",
+ (temp & OHCI_CTRL_IR) ? " IR" : "",
+ hcfs2string (temp & OHCI_CTRL_HCFS),
+ (temp & OHCI_CTRL_BLE) ? " BLE" : "",
+ (temp & OHCI_CTRL_CLE) ? " CLE" : "",
+ (temp & OHCI_CTRL_IE) ? " IE" : "",
+ (temp & OHCI_CTRL_PLE) ? " PLE" : "",
+ temp & OHCI_CTRL_CBSR
+ );
+
+ temp = ohci_readl (controller, ®s->cmdstatus);
+ ohci_dbg_sw (controller, next, size,
+ "cmdstatus 0x%05x SOC=%d%s%s%s%s\n", temp,
+ (temp & OHCI_SOC) >> 16,
+ (temp & OHCI_OCR) ? " OCR" : "",
+ (temp & OHCI_BLF) ? " BLF" : "",
+ (temp & OHCI_CLF) ? " CLF" : "",
+ (temp & OHCI_HCR) ? " HCR" : ""
+ );
+
+ ohci_dump_intr_mask (controller, "intrstatus",
+ ohci_readl (controller, ®s->intrstatus),
+ next, size);
+ ohci_dump_intr_mask (controller, "intrenable",
+ ohci_readl (controller, ®s->intrenable),
+ next, size);
+ // intrdisable always same as intrenable
+
+ maybe_print_eds (controller, "ed_periodcurrent",
+ ohci_readl (controller, ®s->ed_periodcurrent),
+ next, size);
+
+ maybe_print_eds (controller, "ed_controlhead",
+ ohci_readl (controller, ®s->ed_controlhead),
+ next, size);
+ maybe_print_eds (controller, "ed_controlcurrent",
+ ohci_readl (controller, ®s->ed_controlcurrent),
+ next, size);
+
+ maybe_print_eds (controller, "ed_bulkhead",
+ ohci_readl (controller, ®s->ed_bulkhead),
+ next, size);
+ maybe_print_eds (controller, "ed_bulkcurrent",
+ ohci_readl (controller, ®s->ed_bulkcurrent),
+ next, size);
+
+ maybe_print_eds (controller, "donehead",
+ ohci_readl (controller, ®s->donehead), next, size);
+}
+
+#define dbg_port_sw(hc,num,value,next,size) \
+ ohci_dbg_sw (hc, next, size, \
+ "roothub.portstatus [%d] " \
+ "0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \
+ num, temp, \
+ (temp & RH_PS_PRSC) ? " PRSC" : "", \
+ (temp & RH_PS_OCIC) ? " OCIC" : "", \
+ (temp & RH_PS_PSSC) ? " PSSC" : "", \
+ (temp & RH_PS_PESC) ? " PESC" : "", \
+ (temp & RH_PS_CSC) ? " CSC" : "", \
+ \
+ (temp & RH_PS_LSDA) ? " LSDA" : "", \
+ (temp & RH_PS_PPS) ? " PPS" : "", \
+ (temp & RH_PS_PRS) ? " PRS" : "", \
+ (temp & RH_PS_POCI) ? " POCI" : "", \
+ (temp & RH_PS_PSS) ? " PSS" : "", \
+ \
+ (temp & RH_PS_PES) ? " PES" : "", \
+ (temp & RH_PS_CCS) ? " CCS" : "" \
+ );
+
+
+static void
+ohci_dump_roothub (
+ struct ohci_hcd *controller,
+ int verbose,
+ char **next,
+ unsigned *size)
+{
+ u32 temp, i;
+
+ temp = roothub_a (controller);
+ if (temp == ~(u32)0)
+ return;
+
+ if (verbose) {
+ ohci_dbg_sw (controller, next, size,
+ "roothub.a %08x POTPGT=%d%s%s%s%s%s NDP=%d(%d)\n", temp,
+ ((temp & RH_A_POTPGT) >> 24) & 0xff,
+ (temp & RH_A_NOCP) ? " NOCP" : "",
+ (temp & RH_A_OCPM) ? " OCPM" : "",
+ (temp & RH_A_DT) ? " DT" : "",
+ (temp & RH_A_NPS) ? " NPS" : "",
+ (temp & RH_A_PSM) ? " PSM" : "",
+ (temp & RH_A_NDP), controller->num_ports
+ );
+ temp = roothub_b (controller);
+ ohci_dbg_sw (controller, next, size,
+ "roothub.b %08x PPCM=%04x DR=%04x\n",
+ temp,
+ (temp & RH_B_PPCM) >> 16,
+ (temp & RH_B_DR)
+ );
+ temp = roothub_status (controller);
+ ohci_dbg_sw (controller, next, size,
+ "roothub.status %08x%s%s%s%s%s%s\n",
+ temp,
+ (temp & RH_HS_CRWE) ? " CRWE" : "",
+ (temp & RH_HS_OCIC) ? " OCIC" : "",
+ (temp & RH_HS_LPSC) ? " LPSC" : "",
+ (temp & RH_HS_DRWE) ? " DRWE" : "",
+ (temp & RH_HS_OCI) ? " OCI" : "",
+ (temp & RH_HS_LPS) ? " LPS" : ""
+ );
+ }
+
+ for (i = 0; i < controller->num_ports; i++) {
+ temp = roothub_portstatus (controller, i);
+ dbg_port_sw (controller, i, temp, next, size);
+ }
+}
+
+static void ohci_dump(struct ohci_hcd *controller)
+{
+ ohci_dbg (controller, "OHCI controller state\n");
+
+ // dumps some of the state we know about
+ ohci_dump_status (controller, NULL, NULL);
+ if (controller->hcca)
+ ohci_dbg (controller,
+ "hcca frame #%04x\n", ohci_frame_no(controller));
+ ohci_dump_roothub (controller, 1, NULL, NULL);
+}
+
+static const char data0 [] = "DATA0";
+static const char data1 [] = "DATA1";
+
+static void ohci_dump_td (const struct ohci_hcd *ohci, const char *label,
+ const struct td *td)
+{
+ u32 tmp = hc32_to_cpup (ohci, &td->hwINFO);
+
+ ohci_dbg (ohci, "%s td %p%s; urb %p index %d; hw next td %08x\n",
+ label, td,
+ (tmp & TD_DONE) ? " (DONE)" : "",
+ td->urb, td->index,
+ hc32_to_cpup (ohci, &td->hwNextTD));
+ if ((tmp & TD_ISO) == 0) {
+ const char *toggle, *pid;
+ u32 cbp, be;
+
+ switch (tmp & TD_T) {
+ case TD_T_DATA0: toggle = data0; break;
+ case TD_T_DATA1: toggle = data1; break;
+ case TD_T_TOGGLE: toggle = "(CARRY)"; break;
+ default: toggle = "(?)"; break;
+ }
+ switch (tmp & TD_DP) {
+ case TD_DP_SETUP: pid = "SETUP"; break;
+ case TD_DP_IN: pid = "IN"; break;
+ case TD_DP_OUT: pid = "OUT"; break;
+ default: pid = "(bad pid)"; break;
+ }
+ ohci_dbg (ohci, " info %08x CC=%x %s DI=%d %s %s\n", tmp,
+ TD_CC_GET(tmp), /* EC, */ toggle,
+ (tmp & TD_DI) >> 21, pid,
+ (tmp & TD_R) ? "R" : "");
+ cbp = hc32_to_cpup (ohci, &td->hwCBP);
+ be = hc32_to_cpup (ohci, &td->hwBE);
+ ohci_dbg (ohci, " cbp %08x be %08x (len %d)\n", cbp, be,
+ cbp ? (be + 1 - cbp) : 0);
+ } else {
+ unsigned i;
+ ohci_dbg (ohci, " info %08x CC=%x FC=%d DI=%d SF=%04x\n", tmp,
+ TD_CC_GET(tmp),
+ (tmp >> 24) & 0x07,
+ (tmp & TD_DI) >> 21,
+ tmp & 0x0000ffff);
+ ohci_dbg (ohci, " bp0 %08x be %08x\n",
+ hc32_to_cpup (ohci, &td->hwCBP) & ~0x0fff,
+ hc32_to_cpup (ohci, &td->hwBE));
+ for (i = 0; i < MAXPSW; i++) {
+ u16 psw = ohci_hwPSW (ohci, td, i);
+ int cc = (psw >> 12) & 0x0f;
+ ohci_dbg (ohci, " psw [%d] = %2x, CC=%x %s=%d\n", i,
+ psw, cc,
+ (cc >= 0x0e) ? "OFFSET" : "SIZE",
+ psw & 0x0fff);
+ }
+ }
+}
+
+/* caller MUST own hcd spinlock if verbose is set! */
+static void __maybe_unused
+ohci_dump_ed (const struct ohci_hcd *ohci, const char *label,
+ const struct ed *ed, int verbose)
+{
+ u32 tmp = hc32_to_cpu (ohci, ed->hwINFO);
+ char *type = "";
+
+ ohci_dbg (ohci, "%s, ed %p state 0x%x type %s; next ed %08x\n",
+ label,
+ ed, ed->state, edstring (ed->type),
+ hc32_to_cpup (ohci, &ed->hwNextED));
+ switch (tmp & (ED_IN|ED_OUT)) {
+ case ED_OUT: type = "-OUT"; break;
+ case ED_IN: type = "-IN"; break;
+ /* else from TDs ... control */
+ }
+ ohci_dbg (ohci,
+ " info %08x MAX=%d%s%s%s%s EP=%d%s DEV=%d\n", tmp,
+ 0x03ff & (tmp >> 16),
+ (tmp & ED_DEQUEUE) ? " DQ" : "",
+ (tmp & ED_ISO) ? " ISO" : "",
+ (tmp & ED_SKIP) ? " SKIP" : "",
+ (tmp & ED_LOWSPEED) ? " LOW" : "",
+ 0x000f & (tmp >> 7),
+ type,
+ 0x007f & tmp);
+ tmp = hc32_to_cpup (ohci, &ed->hwHeadP);
+ ohci_dbg (ohci, " tds: head %08x %s%s tail %08x%s\n",
+ tmp,
+ (tmp & ED_C) ? data1 : data0,
+ (tmp & ED_H) ? " HALT" : "",
+ hc32_to_cpup (ohci, &ed->hwTailP),
+ verbose ? "" : " (not listing)");
+ if (verbose) {
+ struct list_head *tmp;
+
+ /* use ed->td_list because HC concurrently modifies
+ * hwNextTD as it accumulates ed_donelist.
+ */
+ list_for_each (tmp, &ed->td_list) {
+ struct td *td;
+ td = list_entry (tmp, struct td, td_list);
+ ohci_dump_td (ohci, " ->", td);
+ }
+ }
+}
+
+/*-------------------------------------------------------------------------*/
+
+static int debug_async_open(struct inode *, struct file *);
+static int debug_periodic_open(struct inode *, struct file *);
+static int debug_registers_open(struct inode *, struct file *);
+static int debug_async_open(struct inode *, struct file *);
+static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*);
+static int debug_close(struct inode *, struct file *);
+
+static const struct file_operations debug_async_fops = {
+ .owner = THIS_MODULE,
+ .open = debug_async_open,
+ .read = debug_output,
+ .release = debug_close,
+ .llseek = default_llseek,
+};
+static const struct file_operations debug_periodic_fops = {
+ .owner = THIS_MODULE,
+ .open = debug_periodic_open,
+ .read = debug_output,
+ .release = debug_close,
+ .llseek = default_llseek,
+};
+static const struct file_operations debug_registers_fops = {
+ .owner = THIS_MODULE,
+ .open = debug_registers_open,
+ .read = debug_output,
+ .release = debug_close,
+ .llseek = default_llseek,
+};
+
+static struct dentry *ohci_debug_root;
+
+struct debug_buffer {
+ ssize_t (*fill_func)(struct debug_buffer *); /* fill method */
+ struct ohci_hcd *ohci;
+ struct mutex mutex; /* protect filling of buffer */
+ size_t count; /* number of characters filled into buffer */
+ char *page;
+};
+
+static ssize_t
+show_list (struct ohci_hcd *ohci, char *buf, size_t count, struct ed *ed)
+{
+ unsigned temp, size = count;
+
+ if (!ed)
+ return 0;
+
+ /* print first --> last */
+ while (ed->ed_prev)
+ ed = ed->ed_prev;
+
+ /* dump a snapshot of the bulk or control schedule */
+ while (ed) {
+ u32 info = hc32_to_cpu (ohci, ed->hwINFO);
+ u32 headp = hc32_to_cpu (ohci, ed->hwHeadP);
+ struct list_head *entry;
+ struct td *td;
+
+ temp = scnprintf (buf, size,
+ "ed/%p %cs dev%d ep%d%s max %d %08x%s%s %s",
+ ed,
+ (info & ED_LOWSPEED) ? 'l' : 'f',
+ info & 0x7f,
+ (info >> 7) & 0xf,
+ (info & ED_IN) ? "in" : "out",
+ 0x03ff & (info >> 16),
+ info,
+ (info & ED_SKIP) ? " s" : "",
+ (headp & ED_H) ? " H" : "",
+ (headp & ED_C) ? data1 : data0);
+ size -= temp;
+ buf += temp;
+
+ list_for_each (entry, &ed->td_list) {
+ u32 cbp, be;
+
+ td = list_entry (entry, struct td, td_list);
+ info = hc32_to_cpup (ohci, &td->hwINFO);
+ cbp = hc32_to_cpup (ohci, &td->hwCBP);
+ be = hc32_to_cpup (ohci, &td->hwBE);
+ temp = scnprintf (buf, size,
+ "\n\ttd %p %s %d cc=%x urb %p (%08x)",
+ td,
+ ({ char *pid;
+ switch (info & TD_DP) {
+ case TD_DP_SETUP: pid = "setup"; break;
+ case TD_DP_IN: pid = "in"; break;
+ case TD_DP_OUT: pid = "out"; break;
+ default: pid = "(?)"; break;
+ } pid;}),
+ cbp ? (be + 1 - cbp) : 0,
+ TD_CC_GET (info), td->urb, info);
+ 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 ohci_hcd *ohci;
+ size_t temp, size;
+ unsigned long flags;
+
+ ohci = buf->ohci;
+ size = PAGE_SIZE;
+
+ /* display control and bulk lists together, for simplicity */
+ spin_lock_irqsave (&ohci->lock, flags);
+ temp = show_list(ohci, buf->page, size, ohci->ed_controltail);
+ temp += show_list(ohci, buf->page + temp, size - temp,
+ ohci->ed_bulktail);
+ spin_unlock_irqrestore (&ohci->lock, flags);
+
+ return temp;
+}
+
+#define DBG_SCHED_LIMIT 64
+
+static ssize_t fill_periodic_buffer(struct debug_buffer *buf)
+{
+ struct ohci_hcd *ohci;
+ struct ed **seen, *ed;
+ unsigned long flags;
+ unsigned temp, size, seen_count;
+ char *next;
+ unsigned i;
+
+ seen = kmalloc(DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC);
+ if (!seen)
+ return 0;
+ seen_count = 0;
+
+ ohci = buf->ohci;
+ 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 (&ohci->lock, flags);
+ for (i = 0; i < NUM_INTS; i++) {
+ ed = ohci->periodic[i];
+ if (!ed)
+ continue;
+
+ temp = scnprintf (next, size, "%2d [%3d]:", i, ohci->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 (ohci, 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-%s qlen %u"
+ " max %d %08x%s%s)",
+ (info & ED_LOWSPEED) ? 'l' : 'f',
+ info & 0x7f,
+ (info >> 7) & 0xf,
+ (info & ED_IN) ? "in" : "out",
+ (info & ED_ISO) ? "iso" : "int",
+ qlen,
+ 0x03ff & (info >> 16),
+ info,
+ (info & ED_SKIP) ? " K" : "",
+ (ed->hwHeadP &
+ cpu_to_hc32(ohci, 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 (&ohci->lock, flags);
+ kfree (seen);
+
+ return PAGE_SIZE - size;
+}
+#undef DBG_SCHED_LIMIT
+
+static ssize_t fill_registers_buffer(struct debug_buffer *buf)
+{
+ struct usb_hcd *hcd;
+ struct ohci_hcd *ohci;
+ struct ohci_regs __iomem *regs;
+ unsigned long flags;
+ unsigned temp, size;
+ char *next;
+ u32 rdata;
+
+ ohci = buf->ohci;
+ hcd = ohci_to_hcd(ohci);
+ regs = ohci->regs;
+ next = buf->page;
+ size = PAGE_SIZE;
+
+ spin_lock_irqsave (&ohci->lock, flags);
+
+ /* dump driver info, then registers in spec order */
+
+ ohci_dbg_nosw(ohci, &next, &size,
+ "bus %s, device %s\n"
+ "%s\n"
+ "%s\n",
+ hcd->self.controller->bus->name,
+ dev_name(hcd->self.controller),
+ hcd->product_desc,
+ hcd_name);
+
+ if (!HCD_HW_ACCESSIBLE(hcd)) {
+ size -= scnprintf (next, size,
+ "SUSPENDED (no register access)\n");
+ goto done;
+ }
+
+ ohci_dump_status(ohci, &next, &size);
+
+ /* hcca */
+ if (ohci->hcca)
+ ohci_dbg_nosw(ohci, &next, &size,
+ "hcca frame 0x%04x\n", ohci_frame_no(ohci));
+
+ /* other registers mostly affect frame timings */
+ rdata = ohci_readl (ohci, ®s->fminterval);
+ temp = scnprintf (next, size,
+ "fmintvl 0x%08x %sFSMPS=0x%04x FI=0x%04x\n",
+ rdata, (rdata >> 31) ? "FIT " : "",
+ (rdata >> 16) & 0xefff, rdata & 0xffff);
+ size -= temp;
+ next += temp;
+
+ rdata = ohci_readl (ohci, ®s->fmremaining);
+ temp = scnprintf (next, size, "fmremaining 0x%08x %sFR=0x%04x\n",
+ rdata, (rdata >> 31) ? "FRT " : "",
+ rdata & 0x3fff);
+ size -= temp;
+ next += temp;
+
+ rdata = ohci_readl (ohci, ®s->periodicstart);
+ temp = scnprintf (next, size, "periodicstart 0x%04x\n",
+ rdata & 0x3fff);
+ size -= temp;
+ next += temp;
+
+ rdata = ohci_readl (ohci, ®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",
+ HCD_POLL_RH(ohci_to_hcd(ohci)) ? "ON" : "off");
+ size -= temp;
+ next += temp;
+
+ /* roothub */
+ ohci_dump_roothub (ohci, 1, &next, &size);
+
+done:
+ spin_unlock_irqrestore (&ohci->lock, flags);
+
+ return PAGE_SIZE - size;
+}
+
+static struct debug_buffer *alloc_buffer(struct ohci_hcd *ohci,
+ ssize_t (*fill_func)(struct debug_buffer *))
+{
+ struct debug_buffer *buf;
+
+ buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL);
+
+ if (buf) {
+ buf->ohci = ohci;
+ 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 ohci_hcd *ohci)
+{
+ struct usb_bus *bus = &ohci_to_hcd(ohci)->self;
+
+ ohci->debug_dir = debugfs_create_dir(bus->bus_name, ohci_debug_root);
+ if (!ohci->debug_dir)
+ goto dir_error;
+
+ ohci->debug_async = debugfs_create_file("async", S_IRUGO,
+ ohci->debug_dir, ohci,
+ &debug_async_fops);
+ if (!ohci->debug_async)
+ goto async_error;
+
+ ohci->debug_periodic = debugfs_create_file("periodic", S_IRUGO,
+ ohci->debug_dir, ohci,
+ &debug_periodic_fops);
+ if (!ohci->debug_periodic)
+ goto periodic_error;
+
+ ohci->debug_registers = debugfs_create_file("registers", S_IRUGO,
+ ohci->debug_dir, ohci,
+ &debug_registers_fops);
+ if (!ohci->debug_registers)
+ goto registers_error;
+
+ ohci_dbg (ohci, "created debug files\n");
+ return;
+
+registers_error:
+ debugfs_remove(ohci->debug_periodic);
+periodic_error:
+ debugfs_remove(ohci->debug_async);
+async_error:
+ debugfs_remove(ohci->debug_dir);
+dir_error:
+ ohci->debug_periodic = NULL;
+ ohci->debug_async = NULL;
+ ohci->debug_dir = NULL;
+}
+
+static inline void remove_debug_files (struct ohci_hcd *ohci)
+{
+ debugfs_remove(ohci->debug_registers);
+ debugfs_remove(ohci->debug_periodic);
+ debugfs_remove(ohci->debug_async);
+ debugfs_remove(ohci->debug_dir);
+}
+
+/*-------------------------------------------------------------------------*/
+