[mirror_ubuntu-hirsute-kernel.git] / drivers / usb / host / ohci-dbg.c

/*
 * 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.
 */

/*-------------------------------------------------------------------------*/

#ifdef DEBUG

#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))

/* debug| print the main components of an URB
 * small: 0) header + data packets 1) just header
 */
static void __attribute__((unused))
urb_print (struct urb * urb, char * str, int small)
{
	unsigned int pipe= urb->pipe;

	if (!urb->dev || !urb->dev->bus) {
		dbg("%s URB: no dev", str);
		return;
	}

#ifndef	OHCI_VERBOSE_DEBUG
	if (urb->status != 0)
#endif
	dbg("%s %p dev=%d ep=%d%s-%s flags=%x len=%d/%d stat=%d",
		    str,
		    urb,
		    usb_pipedevice (pipe),
		    usb_pipeendpoint (pipe),
		    usb_pipeout (pipe)? "out" : "in",
		    pipestring (pipe),
		    urb->transfer_flags,
		    urb->actual_length,
		    urb->transfer_buffer_length,
		    urb->status);

#ifdef	OHCI_VERBOSE_DEBUG
	if (!small) {
		int i, len;

		if (usb_pipecontrol (pipe)) {
			printk (KERN_DEBUG __FILE__ ": setup(8):");
			for (i = 0; i < 8 ; i++)
				printk (" %02x", ((__u8 *) urb->setup_packet) [i]);
			printk ("\n");
		}
		if (urb->transfer_buffer_length > 0 && urb->transfer_buffer) {
			printk (KERN_DEBUG __FILE__ ": data(%d/%d):",
				urb->actual_length,
				urb->transfer_buffer_length);
			len = usb_pipeout (pipe)?
						urb->transfer_buffer_length: urb->actual_length;
			for (i = 0; i < 16 && i < len; i++)
				printk (" %02x", ((__u8 *) urb->transfer_buffer) [i]);
			printk ("%s stat:%d\n", i < len? "...": "", urb->status);
		}
	}
#endif
}

#define ohci_dbg_sw(ohci, next, size, format, arg...) \
	do { \
	if (next) { \
		unsigned s_len; \
		s_len = scnprintf (*next, *size, format, ## arg ); \
		*size -= s_len; *next += s_len; \
	} else \
		ohci_dbg(ohci,format, ## arg ); \
	} 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 "?";
}

// 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, &regs->revision) & 0xff;
	ohci_dbg_sw (controller, next, size,
		"OHCI %d.%d, %s legacy support registers\n",
		0x03 & (temp >> 4), (temp & 0x0f),
		(temp & 0x0100) ? "with" : "NO");

	temp = ohci_readl (controller, &regs->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, &regs->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, &regs->intrstatus),
			next, size);
	ohci_dump_intr_mask (controller, "intrenable",
			ohci_readl (controller, &regs->intrenable),
			next, size);
	// intrdisable always same as intrenable

	maybe_print_eds (controller, "ed_periodcurrent",
			ohci_readl (controller, &regs->ed_periodcurrent),
			next, size);

	maybe_print_eds (controller, "ed_controlhead",
			ohci_readl (controller, &regs->ed_controlhead),
			next, size);
	maybe_print_eds (controller, "ed_controlcurrent",
			ohci_readl (controller, &regs->ed_controlcurrent),
			next, size);

	maybe_print_eds (controller, "ed_bulkhead",
			ohci_readl (controller, &regs->ed_bulkhead),
			next, size);
	maybe_print_eds (controller, "ed_bulkcurrent",
			ohci_readl (controller, &regs->ed_bulkcurrent),
			next, size);

	maybe_print_eds (controller, "donehead",
			ohci_readl (controller, &regs->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, int verbose)
{
	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 __attribute__((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);
		}
	}
}

#else
static inline void ohci_dump (struct ohci_hcd *controller, int verbose) {}

#undef OHCI_VERBOSE_DEBUG

#endif /* DEBUG */

/*-------------------------------------------------------------------------*/

#ifdef STUB_DEBUG_FILES

static inline void create_debug_files (struct ohci_hcd *bus) { }
static inline void remove_debug_files (struct ohci_hcd *bus) { }

#else

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
show_async (struct class_device *class_dev, char *buf)
{
	struct usb_bus		*bus;
	struct usb_hcd		*hcd;
	struct ohci_hcd		*ohci;
	size_t			temp;
	unsigned long		flags;

	bus = class_get_devdata(class_dev);
	hcd = bus_to_hcd(bus);
	ohci = hcd_to_ohci(hcd);

	/* 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 + temp, PAGE_SIZE - temp, ohci->ed_bulktail);
	spin_unlock_irqrestore (&ohci->lock, flags);

	return temp;
}
static CLASS_DEVICE_ATTR (async, S_IRUGO, show_async, NULL);


#define DBG_SCHED_LIMIT 64

static ssize_t
show_periodic (struct class_device *class_dev, char *buf)
{
	struct usb_bus		*bus;
	struct usb_hcd		*hcd;
	struct ohci_hcd		*ohci;
	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 = class_get_devdata(class_dev);
	hcd = bus_to_hcd(bus);
	ohci = hcd_to_ohci(hcd);
	next = buf;
	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++) {
		if (!(ed = ohci->periodic [i]))
			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;
}
static CLASS_DEVICE_ATTR (periodic, S_IRUGO, show_periodic, NULL);


#undef DBG_SCHED_LIMIT

static ssize_t
show_registers (struct class_device *class_dev, char *buf)
{
	struct usb_bus		*bus;
	struct usb_hcd		*hcd;
	struct ohci_hcd		*ohci;
	struct ohci_regs __iomem *regs;
	unsigned long		flags;
	unsigned		temp, size;
	char			*next;
	u32			rdata;

	bus = class_get_devdata(class_dev);
	hcd = bus_to_hcd(bus);
	ohci = hcd_to_ohci(hcd);
	regs = ohci->regs;
	next = buf;
	size = PAGE_SIZE;

	spin_lock_irqsave (&ohci->lock, flags);

	/* dump driver info, then registers in spec order */

	ohci_dbg_sw (ohci, &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;
	}

	ohci_dump_status(ohci, &next, &size);

	/* hcca */
	if (ohci->hcca)
		ohci_dbg_sw (ohci, &next, &size,
			"hcca frame 0x%04x\n", ohci_frame_no(ohci));

	/* other registers mostly affect frame timings */
	rdata = ohci_readl (ohci, &regs->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, &regs->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, &regs->periodicstart);
	temp = scnprintf (next, size, "periodicstart 0x%04x\n",
			rdata & 0x3fff);
	size -= temp;
	next += temp;

	rdata = ohci_readl (ohci, &regs->lsthresh);
	temp = scnprintf (next, size, "lsthresh 0x%04x\n",
			rdata & 0x3fff);
	size -= temp;
	next += temp;

	temp = scnprintf (next, size, "hub poll timer %s\n",
			ohci_to_hcd(ohci)->poll_rh ? "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 CLASS_DEVICE_ATTR (registers, S_IRUGO, show_registers, NULL);


static inline void create_debug_files (struct ohci_hcd *ohci)
{
	struct class_device *cldev = ohci_to_hcd(ohci)->self.class_dev;
	int retval;

	retval = class_device_create_file(cldev, &class_device_attr_async);
	retval = class_device_create_file(cldev, &class_device_attr_periodic);
	retval = class_device_create_file(cldev, &class_device_attr_registers);
	ohci_dbg (ohci, "created debug files\n");
}

static inline void remove_debug_files (struct ohci_hcd *ohci)
{
	struct class_device *cldev = ohci_to_hcd(ohci)->self.class_dev;

	class_device_remove_file(cldev, &class_device_attr_async);
	class_device_remove_file(cldev, &class_device_attr_periodic);
	class_device_remove_file(cldev, &class_device_attr_registers);
}

#endif

/*-------------------------------------------------------------------------*/
Commit	Line	Data
1da177e4 LT	1	/*
	2	* OHCI HCD (Host Controller Driver) for USB.
	3	*
	4	* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
	5	* (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
	6	*
	7	* This file is licenced under the GPL.
	8	*/
	9
	10	/-------------------------------------------------------------------------/
	11
	12	#ifdef DEBUG
	13
	14	#define edstring(ed_type) ({ char *temp; \
	15	switch (ed_type) { \
	16	case PIPE_CONTROL: temp = "ctrl"; break; \
	17	case PIPE_BULK: temp = "bulk"; break; \
	18	case PIPE_INTERRUPT: temp = "intr"; break; \
	19	default: temp = "isoc"; break; \
	20	}; temp;})
	21	#define pipestring(pipe) edstring(usb_pipetype(pipe))
	22
	23	/* debug\| print the main components of an URB
	24	* small: 0) header + data packets 1) just header
	25	*/
	26	static void __attribute__((unused))
	27	urb_print (struct urb * urb, char * str, int small)
	28	{
	29	unsigned int pipe= urb->pipe;
	30
	31	if (!urb->dev \|\| !urb->dev->bus) {
	32	dbg("%s URB: no dev", str);
	33	return;
	34	}
	35
	36	#ifndef OHCI_VERBOSE_DEBUG
	37	if (urb->status != 0)
	38	#endif
	39	dbg("%s %p dev=%d ep=%d%s-%s flags=%x len=%d/%d stat=%d",
	40	str,
	41	urb,
	42	usb_pipedevice (pipe),
	43	usb_pipeendpoint (pipe),
	44	usb_pipeout (pipe)? "out" : "in",
	45	pipestring (pipe),
	46	urb->transfer_flags,
	47	urb->actual_length,
	48	urb->transfer_buffer_length,
	49	urb->status);
	50
	51	#ifdef OHCI_VERBOSE_DEBUG
	52	if (!small) {
	53	int i, len;
	54
	55	if (usb_pipecontrol (pipe)) {
	56	printk (KERN_DEBUG __FILE__ ": setup(8):");
	57	for (i = 0; i < 8 ; i++)
	58	printk (" %02x", ((__u8 *) urb->setup_packet) [i]);
	59	printk ("\n");
	60	}
	61	if (urb->transfer_buffer_length > 0 && urb->transfer_buffer) {
	62	printk (KERN_DEBUG __FILE__ ": data(%d/%d):",
	63	urb->actual_length,
	64	urb->transfer_buffer_length);
65	len = usb_pipeout (pipe)?
66	urb->transfer_buffer_length: urb->actual_length;
67	for (i = 0; i < 16 && i < len; i++)
68	printk (" %02x", ((__u8 *) urb->transfer_buffer) [i]);
69	printk ("%s stat:%d\n", i < len? "...": "", urb->status);
70	}
71	}
72	#endif
73	}
74
75	#define ohci_dbg_sw(ohci, next, size, format, arg...) \
76	do { \
77	if (next) { \
78	unsigned s_len; \
79	s_len = scnprintf (next, size, format, ## arg ); \
80	size -= s_len; next += s_len; \
81	} else \
82	ohci_dbg(ohci,format, ## arg ); \
83	} while (0);
84
85
86	static void ohci_dump_intr_mask (
87	struct ohci_hcd *ohci,
88	char *label,
89	u32 mask,
90	char **next,
91	unsigned *size)
92	{
93	ohci_dbg_sw (ohci, next, size, "%s 0x%08x%s%s%s%s%s%s%s%s%s\n",
94	label,
95	mask,
96	(mask & OHCI_INTR_MIE) ? " MIE" : "",
97	(mask & OHCI_INTR_OC) ? " OC" : "",
98	(mask & OHCI_INTR_RHSC) ? " RHSC" : "",
99	(mask & OHCI_INTR_FNO) ? " FNO" : "",
100	(mask & OHCI_INTR_UE) ? " UE" : "",
101	(mask & OHCI_INTR_RD) ? " RD" : "",
102	(mask & OHCI_INTR_SF) ? " SF" : "",
103	(mask & OHCI_INTR_WDH) ? " WDH" : "",
104	(mask & OHCI_INTR_SO) ? " SO" : ""
105	);
106	}
107
108	static void maybe_print_eds (
109	struct ohci_hcd *ohci,
110	char *label,
111	u32 value,
112	char **next,
113	unsigned *size)
114	{
115	if (value)
116	ohci_dbg_sw (ohci, next, size, "%s %08x\n", label, value);
117	}
118
119	static char *hcfs2string (int state)
120	{
121	switch (state) {
122	case OHCI_USB_RESET: return "reset";
123	case OHCI_USB_RESUME: return "resume";
124	case OHCI_USB_OPER: return "operational";
125	case OHCI_USB_SUSPEND: return "suspend";
126	}
127	return "?";
128	}
129
130	// dump control and status registers
131	static void
132	ohci_dump_status (struct ohci_hcd controller, char next, unsigned size)
133	{
134	struct ohci_regs __iomem *regs = controller->regs;
135	u32 temp;
136
137	temp = ohci_readl (controller, &regs->revision) & 0xff;
138	ohci_dbg_sw (controller, next, size,
139	"OHCI %d.%d, %s legacy support registers\n",
140	0x03 & (temp >> 4), (temp & 0x0f),
141	(temp & 0x0100) ? "with" : "NO");
142
143	temp = ohci_readl (controller, &regs->control);
144	ohci_dbg_sw (controller, next, size,
145	"control 0x%03x%s%s%s HCFS=%s%s%s%s%s CBSR=%d\n",
146	temp,
147	(temp & OHCI_CTRL_RWE) ? " RWE" : "",
148	(temp & OHCI_CTRL_RWC) ? " RWC" : "",
149	(temp & OHCI_CTRL_IR) ? " IR" : "",
150	hcfs2string (temp & OHCI_CTRL_HCFS),
151	(temp & OHCI_CTRL_BLE) ? " BLE" : "",
152	(temp & OHCI_CTRL_CLE) ? " CLE" : "",
153	(temp & OHCI_CTRL_IE) ? " IE" : "",
154	(temp & OHCI_CTRL_PLE) ? " PLE" : "",
155	temp & OHCI_CTRL_CBSR
156	);
157
158	temp = ohci_readl (controller, &regs->cmdstatus);
159	ohci_dbg_sw (controller, next, size,
160	"cmdstatus 0x%05x SOC=%d%s%s%s%s\n", temp,
161	(temp & OHCI_SOC) >> 16,
162	(temp & OHCI_OCR) ? " OCR" : "",
163	(temp & OHCI_BLF) ? " BLF" : "",
164	(temp & OHCI_CLF) ? " CLF" : "",
165	(temp & OHCI_HCR) ? " HCR" : ""
166	);
167
168	ohci_dump_intr_mask (controller, "intrstatus",
169	ohci_readl (controller, &regs->intrstatus),
170	next, size);
171	ohci_dump_intr_mask (controller, "intrenable",
172	ohci_readl (controller, &regs->intrenable),
173	next, size);
174	// intrdisable always same as intrenable
175
176	maybe_print_eds (controller, "ed_periodcurrent",
177	ohci_readl (controller, &regs->ed_periodcurrent),
178	next, size);
179
180	maybe_print_eds (controller, "ed_controlhead",
181	ohci_readl (controller, &regs->ed_controlhead),
182	next, size);
183	maybe_print_eds (controller, "ed_controlcurrent",
184	ohci_readl (controller, &regs->ed_controlcurrent),
185	next, size);
186
187	maybe_print_eds (controller, "ed_bulkhead",
188	ohci_readl (controller, &regs->ed_bulkhead),
189	next, size);
190	maybe_print_eds (controller, "ed_bulkcurrent",
191	ohci_readl (controller, &regs->ed_bulkcurrent),
192	next, size);
193
194	maybe_print_eds (controller, "donehead",
195	ohci_readl (controller, &regs->donehead), next, size);
1da177e4 LT	196	}
	197
	198	#define dbg_port_sw(hc,num,value,next,size) \
	199	ohci_dbg_sw (hc, next, size, \
	200	"roothub.portstatus [%d] " \
	201	"0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \
	202	num, temp, \
	203	(temp & RH_PS_PRSC) ? " PRSC" : "", \
	204	(temp & RH_PS_OCIC) ? " OCIC" : "", \
	205	(temp & RH_PS_PSSC) ? " PSSC" : "", \
	206	(temp & RH_PS_PESC) ? " PESC" : "", \
	207	(temp & RH_PS_CSC) ? " CSC" : "", \
	208	\
	209	(temp & RH_PS_LSDA) ? " LSDA" : "", \
	210	(temp & RH_PS_PPS) ? " PPS" : "", \
	211	(temp & RH_PS_PRS) ? " PRS" : "", \
	212	(temp & RH_PS_POCI) ? " POCI" : "", \
	213	(temp & RH_PS_PSS) ? " PSS" : "", \
	214	\
	215	(temp & RH_PS_PES) ? " PES" : "", \
	216	(temp & RH_PS_CCS) ? " CCS" : "" \
	217	);
	218
	219
	220	static void
	221	ohci_dump_roothub (
	222	struct ohci_hcd *controller,
	223	int verbose,
	224	char **next,
	225	unsigned *size)
	226	{
fdd13b36	227	u32 temp, i;
1da177e4 LT	228
	229	temp = roothub_a (controller);
	230	if (temp == ~(u32)0)
	231	return;
1da177e4 LT	232
	233	if (verbose) {
	234	ohci_dbg_sw (controller, next, size,
fdd13b36	235	"roothub.a %08x POTPGT=%d%s%s%s%s%s NDP=%d(%d)\n", temp,
1da177e4 LT	236	((temp & RH_A_POTPGT) >> 24) & 0xff,
	237	(temp & RH_A_NOCP) ? " NOCP" : "",
	238	(temp & RH_A_OCPM) ? " OCPM" : "",
	239	(temp & RH_A_DT) ? " DT" : "",
	240	(temp & RH_A_NPS) ? " NPS" : "",
	241	(temp & RH_A_PSM) ? " PSM" : "",
fdd13b36	242	(temp & RH_A_NDP), controller->num_ports
1da177e4 LT	243	);
	244	temp = roothub_b (controller);
	245	ohci_dbg_sw (controller, next, size,
	246	"roothub.b %08x PPCM=%04x DR=%04x\n",
	247	temp,
	248	(temp & RH_B_PPCM) >> 16,
	249	(temp & RH_B_DR)
	250	);
	251	temp = roothub_status (controller);
	252	ohci_dbg_sw (controller, next, size,
	253	"roothub.status %08x%s%s%s%s%s%s\n",
	254	temp,
	255	(temp & RH_HS_CRWE) ? " CRWE" : "",
	256	(temp & RH_HS_OCIC) ? " OCIC" : "",
	257	(temp & RH_HS_LPSC) ? " LPSC" : "",
	258	(temp & RH_HS_DRWE) ? " DRWE" : "",
	259	(temp & RH_HS_OCI) ? " OCI" : "",
	260	(temp & RH_HS_LPS) ? " LPS" : ""
	261	);
	262	}
	263
fdd13b36	264	for (i = 0; i < controller->num_ports; i++) {
1da177e4 LT	265	temp = roothub_portstatus (controller, i);
	266	dbg_port_sw (controller, i, temp, next, size);
	267	}
	268	}
	269
	270	static void ohci_dump (struct ohci_hcd *controller, int verbose)
	271	{
	272	ohci_dbg (controller, "OHCI controller state\n");
	273
	274	// dumps some of the state we know about
	275	ohci_dump_status (controller, NULL, NULL);
	276	if (controller->hcca)
	277	ohci_dbg (controller,
	278	"hcca frame #%04x\n", ohci_frame_no(controller));
	279	ohci_dump_roothub (controller, 1, NULL, NULL);
	280	}
	281
	282	static const char data0 [] = "DATA0";
	283	static const char data1 [] = "DATA1";
	284
	285	static void ohci_dump_td (const struct ohci_hcd ohci, const char label,
	286	const struct td *td)
	287	{
	288	u32 tmp = hc32_to_cpup (ohci, &td->hwINFO);
	289
	290	ohci_dbg (ohci, "%s td %p%s; urb %p index %d; hw next td %08x\n",
	291	label, td,
	292	(tmp & TD_DONE) ? " (DONE)" : "",
	293	td->urb, td->index,
	294	hc32_to_cpup (ohci, &td->hwNextTD));
	295	if ((tmp & TD_ISO) == 0) {
	296	const char toggle, pid;
	297	u32 cbp, be;
	298
	299	switch (tmp & TD_T) {
	300	case TD_T_DATA0: toggle = data0; break;
	301	case TD_T_DATA1: toggle = data1; break;
	302	case TD_T_TOGGLE: toggle = "(CARRY)"; break;
	303	default: toggle = "(?)"; break;
	304	}
	305	switch (tmp & TD_DP) {
	306	case TD_DP_SETUP: pid = "SETUP"; break;
	307	case TD_DP_IN: pid = "IN"; break;
	308	case TD_DP_OUT: pid = "OUT"; break;
	309	default: pid = "(bad pid)"; break;
	310	}
	311	ohci_dbg (ohci, " info %08x CC=%x %s DI=%d %s %s\n", tmp,
	312	TD_CC_GET(tmp), /* EC, */ toggle,
	313	(tmp & TD_DI) >> 21, pid,
	314	(tmp & TD_R) ? "R" : "");
	315	cbp = hc32_to_cpup (ohci, &td->hwCBP);
	316	be = hc32_to_cpup (ohci, &td->hwBE);
	317	ohci_dbg (ohci, " cbp %08x be %08x (len %d)\n", cbp, be,
	318	cbp ? (be + 1 - cbp) : 0);
	319	} else {
	320	unsigned i;
	321	ohci_dbg (ohci, " info %08x CC=%x FC=%d DI=%d SF=%04x\n", tmp,
	322	TD_CC_GET(tmp),
	323	(tmp >> 24) & 0x07,
	324	(tmp & TD_DI) >> 21,
	325	tmp & 0x0000ffff);
	326	ohci_dbg (ohci, " bp0 %08x be %08x\n",
	327	hc32_to_cpup (ohci, &td->hwCBP) & ~0x0fff,
	328	hc32_to_cpup (ohci, &td->hwBE));
329	for (i = 0; i < MAXPSW; i++) {
330	u16 psw = ohci_hwPSW (ohci, td, i);
331	int cc = (psw >> 12) & 0x0f;
332	ohci_dbg (ohci, " psw [%d] = %2x, CC=%x %s=%d\n", i,
333	psw, cc,
334	(cc >= 0x0e) ? "OFFSET" : "SIZE",
335	psw & 0x0fff);
336	}
337	}
338	}
339
340	/* caller MUST own hcd spinlock if verbose is set! */
341	static void __attribute__((unused))
342	ohci_dump_ed (const struct ohci_hcd ohci, const char label,
343	const struct ed *ed, int verbose)
344	{
345	u32 tmp = hc32_to_cpu (ohci, ed->hwINFO);
346	char *type = "";
347
348	ohci_dbg (ohci, "%s, ed %p state 0x%x type %s; next ed %08x\n",
349	label,
350	ed, ed->state, edstring (ed->type),
351	hc32_to_cpup (ohci, &ed->hwNextED));
352	switch (tmp & (ED_IN\|ED_OUT)) {
353	case ED_OUT: type = "-OUT"; break;
354	case ED_IN: type = "-IN"; break;
355	/* else from TDs ... control */
356	}
357	ohci_dbg (ohci,
358	" info %08x MAX=%d%s%s%s%s EP=%d%s DEV=%d\n", tmp,
359	0x03ff & (tmp >> 16),
360	(tmp & ED_DEQUEUE) ? " DQ" : "",
361	(tmp & ED_ISO) ? " ISO" : "",
362	(tmp & ED_SKIP) ? " SKIP" : "",
363	(tmp & ED_LOWSPEED) ? " LOW" : "",
364	0x000f & (tmp >> 7),
365	type,
366	0x007f & tmp);
367	tmp = hc32_to_cpup (ohci, &ed->hwHeadP);
368	ohci_dbg (ohci, " tds: head %08x %s%s tail %08x%s\n",
369	tmp,
370	(tmp & ED_C) ? data1 : data0,
371	(tmp & ED_H) ? " HALT" : "",
372	hc32_to_cpup (ohci, &ed->hwTailP),
373	verbose ? "" : " (not listing)");
374	if (verbose) {
375	struct list_head *tmp;
376
377	/* use ed->td_list because HC concurrently modifies
378	* hwNextTD as it accumulates ed_donelist.
379	*/
380	list_for_each (tmp, &ed->td_list) {
381	struct td *td;
382	td = list_entry (tmp, struct td, td_list);
383	ohci_dump_td (ohci, " ->", td);
384	}
385	}
386	}
387
388	#else
389	static inline void ohci_dump (struct ohci_hcd *controller, int verbose) {}
390
391	#undef OHCI_VERBOSE_DEBUG
392
393	#endif /* DEBUG */
394
395	/-------------------------------------------------------------------------/
396
397	#ifdef STUB_DEBUG_FILES
398
399	static inline void create_debug_files (struct ohci_hcd *bus) { }
400	static inline void remove_debug_files (struct ohci_hcd *bus) { }
401
402	#else
403
404	static ssize_t
405	show_list (struct ohci_hcd ohci, char buf, size_t count, struct ed *ed)
406	{
407	unsigned temp, size = count;
408
409	if (!ed)
410	return 0;
411
412	/* print first --> last */
413	while (ed->ed_prev)
414	ed = ed->ed_prev;
415
416	/* dump a snapshot of the bulk or control schedule */
417	while (ed) {
418	u32 info = hc32_to_cpu (ohci, ed->hwINFO);
419	u32 headp = hc32_to_cpu (ohci, ed->hwHeadP);
420	struct list_head *entry;
421	struct td *td;
422
423	temp = scnprintf (buf, size,
424	"ed/%p %cs dev%d ep%d%s max %d %08x%s%s %s",
425	ed,
426	(info & ED_LOWSPEED) ? 'l' : 'f',
427	info & 0x7f,
428	(info >> 7) & 0xf,
429	(info & ED_IN) ? "in" : "out",
430	0x03ff & (info >> 16),
431	info,
432	(info & ED_SKIP) ? " s" : "",
433	(headp & ED_H) ? " H" : "",
434	(headp & ED_C) ? data1 : data0);
435	size -= temp;
436	buf += temp;
437
438	list_for_each (entry, &ed->td_list) {
439	u32 cbp, be;
440
441	td = list_entry (entry, struct td, td_list);
442	info = hc32_to_cpup (ohci, &td->hwINFO);
443	cbp = hc32_to_cpup (ohci, &td->hwCBP);
444	be = hc32_to_cpup (ohci, &td->hwBE);
445	temp = scnprintf (buf, size,
446	"\n\ttd %p %s %d cc=%x urb %p (%08x)",
447	td,
448	({ char *pid;
449	switch (info & TD_DP) {
450	case TD_DP_SETUP: pid = "setup"; break;
451	case TD_DP_IN: pid = "in"; break;
452	case TD_DP_OUT: pid = "out"; break;
453	default: pid = "(?)"; break;
454	} pid;}),
455	cbp ? (be + 1 - cbp) : 0,
456	TD_CC_GET (info), td->urb, info);
457	size -= temp;
458	buf += temp;
459	}
460
461	temp = scnprintf (buf, size, "\n");
462	size -= temp;
463	buf += temp;
464
465	ed = ed->ed_next;
466	}
467	return count - size;
468	}
469
470	static ssize_t
471	show_async (struct class_device class_dev, char buf)
472	{
473	struct usb_bus *bus;
474	struct usb_hcd *hcd;
475	struct ohci_hcd *ohci;
476	size_t temp;
477	unsigned long flags;
478
8561b10f	479	bus = class_get_devdata(class_dev);
17200583	480	hcd = bus_to_hcd(bus);
1da177e4 LT	481	ohci = hcd_to_ohci(hcd);
	482
	483	/* display control and bulk lists together, for simplicity */
	484	spin_lock_irqsave (&ohci->lock, flags);
	485	temp = show_list (ohci, buf, PAGE_SIZE, ohci->ed_controltail);
	486	temp += show_list (ohci, buf + temp, PAGE_SIZE - temp, ohci->ed_bulktail);
	487	spin_unlock_irqrestore (&ohci->lock, flags);
	488
	489	return temp;
	490	}
	491	static CLASS_DEVICE_ATTR (async, S_IRUGO, show_async, NULL);
	492
	493
	494	#define DBG_SCHED_LIMIT 64
	495
	496	static ssize_t
	497	show_periodic (struct class_device class_dev, char buf)
	498	{
	499	struct usb_bus *bus;
	500	struct usb_hcd *hcd;
	501	struct ohci_hcd *ohci;
	502	struct ed *seen, ed;
	503	unsigned long flags;
	504	unsigned temp, size, seen_count;
	505	char *next;
	506	unsigned i;
	507
54e6ecb2	508	if (!(seen = kmalloc (DBG_SCHED_LIMIT * sizeof *seen, GFP_ATOMIC)))
1da177e4 LT	509	return 0;
	510	seen_count = 0;
	511
8561b10f	512	bus = class_get_devdata(class_dev);
17200583	513	hcd = bus_to_hcd(bus);
1da177e4 LT	514	ohci = hcd_to_ohci(hcd);
	515	next = buf;
	516	size = PAGE_SIZE;
	517
	518	temp = scnprintf (next, size, "size = %d\n", NUM_INTS);
	519	size -= temp;
	520	next += temp;
	521
	522	/* dump a snapshot of the periodic schedule (and load) */
	523	spin_lock_irqsave (&ohci->lock, flags);
	524	for (i = 0; i < NUM_INTS; i++) {
	525	if (!(ed = ohci->periodic [i]))
	526	continue;
	527
	528	temp = scnprintf (next, size, "%2d [%3d]:", i, ohci->load [i]);
	529	size -= temp;
	530	next += temp;
	531
	532	do {
	533	temp = scnprintf (next, size, " ed%d/%p",
	534	ed->interval, ed);
	535	size -= temp;
	536	next += temp;
	537	for (temp = 0; temp < seen_count; temp++) {
	538	if (seen [temp] == ed)
	539	break;
	540	}
	541
	542	/* show more info the first time around */
	543	if (temp == seen_count) {
	544	u32 info = hc32_to_cpu (ohci, ed->hwINFO);
	545	struct list_head *entry;
	546	unsigned qlen = 0;
	547
	548	/* qlen measured here in TDs, not urbs */
	549	list_for_each (entry, &ed->td_list)
	550	qlen++;
	551
	552	temp = scnprintf (next, size,
	553	" (%cs dev%d ep%d%s-%s qlen %u"
	554	" max %d %08x%s%s)",
	555	(info & ED_LOWSPEED) ? 'l' : 'f',
	556	info & 0x7f,
	557	(info >> 7) & 0xf,
	558	(info & ED_IN) ? "in" : "out",
	559	(info & ED_ISO) ? "iso" : "int",
	560	qlen,
	561	0x03ff & (info >> 16),
	562	info,
	563	(info & ED_SKIP) ? " K" : "",
	564	(ed->hwHeadP &
	565	cpu_to_hc32(ohci, ED_H)) ?
	566	" H" : "");
	567	size -= temp;
	568	next += temp;
	569
	570	if (seen_count < DBG_SCHED_LIMIT)
	571	seen [seen_count++] = ed;
	572
	573	ed = ed->ed_next;
	574
	575	} else {
	576	/* we've seen it and what's after */
	577	temp = 0;
578	ed = NULL;
579	}
580
581	} while (ed);
582
583	temp = scnprintf (next, size, "\n");
584	size -= temp;
585	next += temp;
586	}
587	spin_unlock_irqrestore (&ohci->lock, flags);
588	kfree (seen);
589
590	return PAGE_SIZE - size;
591	}
592	static CLASS_DEVICE_ATTR (periodic, S_IRUGO, show_periodic, NULL);
593
594
595	#undef DBG_SCHED_LIMIT
596
597	static ssize_t
598	show_registers (struct class_device class_dev, char buf)
599	{
600	struct usb_bus *bus;
601	struct usb_hcd *hcd;
602	struct ohci_hcd *ohci;
603	struct ohci_regs __iomem *regs;
604	unsigned long flags;
605	unsigned temp, size;
606	char *next;
607	u32 rdata;
608
8561b10f	609	bus = class_get_devdata(class_dev);
17200583	610	hcd = bus_to_hcd(bus);
1da177e4 LT	611	ohci = hcd_to_ohci(hcd);
	612	regs = ohci->regs;
	613	next = buf;
	614	size = PAGE_SIZE;
	615
	616	spin_lock_irqsave (&ohci->lock, flags);
	617
	618	/* dump driver info, then registers in spec order */
	619
	620	ohci_dbg_sw (ohci, &next, &size,
	621	"bus %s, device %s\n"
	622	"%s\n"
	623	"%s version " DRIVER_VERSION "\n",
	624	hcd->self.controller->bus->name,
	625	hcd->self.controller->bus_id,
	626	hcd->product_desc,
	627	hcd_name);
	628
ca078bae	629	if (bus->controller->power.power_state.event) {
1da177e4 LT	630	size -= scnprintf (next, size,
	631	"SUSPENDED (no register access)\n");
	632	goto done;
	633	}
	634
	635	ohci_dump_status(ohci, &next, &size);
	636
	637	/* hcca */
	638	if (ohci->hcca)
	639	ohci_dbg_sw (ohci, &next, &size,
	640	"hcca frame 0x%04x\n", ohci_frame_no(ohci));
	641
	642	/* other registers mostly affect frame timings */
	643	rdata = ohci_readl (ohci, &regs->fminterval);
	644	temp = scnprintf (next, size,
	645	"fmintvl 0x%08x %sFSMPS=0x%04x FI=0x%04x\n",
	646	rdata, (rdata >> 31) ? "FIT " : "",
	647	(rdata >> 16) & 0xefff, rdata & 0xffff);
	648	size -= temp;
	649	next += temp;
	650
	651	rdata = ohci_readl (ohci, &regs->fmremaining);
	652	temp = scnprintf (next, size, "fmremaining 0x%08x %sFR=0x%04x\n",
	653	rdata, (rdata >> 31) ? "FRT " : "",
	654	rdata & 0x3fff);
	655	size -= temp;
	656	next += temp;
	657
	658	rdata = ohci_readl (ohci, &regs->periodicstart);
	659	temp = scnprintf (next, size, "periodicstart 0x%04x\n",
	660	rdata & 0x3fff);
	661	size -= temp;
	662	next += temp;
	663
	664	rdata = ohci_readl (ohci, &regs->lsthresh);
	665	temp = scnprintf (next, size, "lsthresh 0x%04x\n",
	666	rdata & 0x3fff);
	667	size -= temp;
	668	next += temp;
	669
d413984a DB	670	temp = scnprintf (next, size, "hub poll timer %s\n",
	671	ohci_to_hcd(ohci)->poll_rh ? "ON" : "off");
	672	size -= temp;
	673	next += temp;
	674
1da177e4 LT	675	/* roothub */
	676	ohci_dump_roothub (ohci, 1, &next, &size);
	677
	678	done:
	679	spin_unlock_irqrestore (&ohci->lock, flags);
	680	return PAGE_SIZE - size;
	681	}
	682	static CLASS_DEVICE_ATTR (registers, S_IRUGO, show_registers, NULL);
	683
	684
	685	static inline void create_debug_files (struct ohci_hcd *ohci)
	686	{
8561b10f	687	struct class_device *cldev = ohci_to_hcd(ohci)->self.class_dev;
1ee95216	688	int retval;
1da177e4	689
1ee95216 GKH	690	retval = class_device_create_file(cldev, &class_device_attr_async);
	691	retval = class_device_create_file(cldev, &class_device_attr_periodic);
	692	retval = class_device_create_file(cldev, &class_device_attr_registers);
1da177e4 LT	693	ohci_dbg (ohci, "created debug files\n");
	694	}
	695
	696	static inline void remove_debug_files (struct ohci_hcd *ohci)
	697	{
8561b10f	698	struct class_device *cldev = ohci_to_hcd(ohci)->self.class_dev;
1da177e4 LT	699
	700	class_device_remove_file(cldev, &class_device_attr_async);
	701	class_device_remove_file(cldev, &class_device_attr_periodic);
	702	class_device_remove_file(cldev, &class_device_attr_registers);
	703	}
	704
	705	#endif
	706
	707	/-------------------------------------------------------------------------/
	708