ohci-dbg.c

linux-2.6.15.6

/*
 * OHCI HCD (Host Controller Driver) for USB.
 *
 * (C) Copyright 1999 Roman Weissgaerber <[e-mail]>
 * (C) Copyright 2000-2002 David Brownell <[e-mail]>
 *
 * 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)) {