Merge branch 'linus' into x86/gart

1 files changed, 830 insertions, 0 deletions

diff --git a/drivers/usb/musb/musb_procfs.c b/drivers/usb/musb/musb_procfs.c
new file mode 100644
index 00000000000..55e6b78bdcc
--- /dev/null
+++ b/drivers/usb/musb/musb_procfs.c
@@ -0,0 +1,830 @@
+/*
+ * MUSB OTG driver debug support
+ *
+ * Copyright 2005 Mentor Graphics Corporation
+ * Copyright (C) 2005-2006 by Texas Instruments
+ * Copyright (C) 2006-2007 Nokia Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
+ * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/uaccess.h>	/* FIXME remove procfs writes */
+#include <asm/arch/hardware.h>
+
+#include "musb_core.h"
+
+#include "davinci.h"
+
+#ifdef CONFIG_USB_MUSB_HDRC_HCD
+
+static int dump_qh(struct musb_qh *qh, char *buf, unsigned max)
+{
+	int				count;
+	int				tmp;
+	struct usb_host_endpoint	*hep = qh->hep;
+	struct urb			*urb;
+
+	count = snprintf(buf, max, "    qh %p dev%d ep%d%s max%d\n",
+			qh, qh->dev->devnum, qh->epnum,
+			({ char *s; switch (qh->type) {
+			case USB_ENDPOINT_XFER_BULK:
+				s = "-bulk"; break;
+			case USB_ENDPOINT_XFER_INT:
+				s = "-int"; break;
+			case USB_ENDPOINT_XFER_CONTROL:
+				s = ""; break;
+			default:
+				s = "iso"; break;
+			}; s; }),
+			qh->maxpacket);
+	if (count <= 0)
+		return 0;
+	buf += count;
+	max -= count;
+
+	list_for_each_entry(urb, &hep->urb_list, urb_list) {
+		tmp = snprintf(buf, max, "\t%s urb %p %d/%d\n",
+				usb_pipein(urb->pipe) ? "in" : "out",
+				urb, urb->actual_length,
+				urb->transfer_buffer_length);
+		if (tmp <= 0)
+			break;
+		tmp = min(tmp, (int)max);
+		count += tmp;
+		buf += tmp;
+		max -= tmp;
+	}
+	return count;
+}
+
+static int
+dump_queue(struct list_head *q, char *buf, unsigned max)
+{
+	int		count = 0;
+	struct musb_qh	*qh;
+
+	list_for_each_entry(qh, q, ring) {
+		int	tmp;
+
+		tmp = dump_qh(qh, buf, max);
+		if (tmp <= 0)
+			break;
+		tmp = min(tmp, (int)max);
+		count += tmp;
+		buf += tmp;
+		max -= tmp;
+	}
+	return count;
+}
+
+#endif	/* HCD */
+
+#ifdef CONFIG_USB_GADGET_MUSB_HDRC
+static int dump_ep(struct musb_ep *ep, char *buffer, unsigned max)
+{
+	char		*buf = buffer;
+	int		code = 0;
+	void __iomem	*regs = ep->hw_ep->regs;
+	char		*mode = "1buf";
+
+	if (ep->is_in) {
+		if (ep->hw_ep->tx_double_buffered)
+			mode = "2buf";
+	} else {
+		if (ep->hw_ep->rx_double_buffered)
+			mode = "2buf";
+	}
+
+	do {
+		struct usb_request	*req;
+
+		code = snprintf(buf, max,
+				"\n%s (hw%d): %s%s, csr %04x maxp %04x\n",
+				ep->name, ep->current_epnum,
+				mode, ep->dma ? " dma" : "",
+				musb_readw(regs,
+					(ep->is_in || !ep->current_epnum)
+						? MUSB_TXCSR
+						: MUSB_RXCSR),
+				musb_readw(regs, ep->is_in
+						? MUSB_TXMAXP
+						: MUSB_RXMAXP)
+				);
+		if (code <= 0)
+			break;
+		code = min(code, (int) max);
+		buf += code;
+		max -= code;
+
+		if (is_cppi_enabled() && ep->current_epnum) {
+			unsigned	cppi = ep->current_epnum - 1;
+			void __iomem	*base = ep->musb->ctrl_base;
+			unsigned	off1 = cppi << 2;
+			void __iomem	*ram = base;
+			char		tmp[16];
+
+			if (ep->is_in) {
+				ram += DAVINCI_TXCPPI_STATERAM_OFFSET(cppi);
+				tmp[0] = 0;
+			} else {
+				ram += DAVINCI_RXCPPI_STATERAM_OFFSET(cppi);
+				snprintf(tmp, sizeof tmp, "%d left, ",
+					musb_readl(base,
+					DAVINCI_RXCPPI_BUFCNT0_REG + off1));
+			}
+
+			code = snprintf(buf, max, "%cX DMA%d: %s"
+					"%08x %08x, %08x %08x; "
+					"%08x %08x %08x .. %08x\n",
+				ep->is_in ? 'T' : 'R',
+				ep->current_epnum - 1, tmp,
+				musb_readl(ram, 0 * 4),
+				musb_readl(ram, 1 * 4),
+				musb_readl(ram, 2 * 4),
+				musb_readl(ram, 3 * 4),
+				musb_readl(ram, 4 * 4),
+				musb_readl(ram, 5 * 4),
+				musb_readl(ram, 6 * 4),
+				musb_readl(ram, 7 * 4));
+			if (code <= 0)
+				break;
+			code = min(code, (int) max);
+			buf += code;
+			max -= code;
+		}
+
+		if (list_empty(&ep->req_list)) {
+			code = snprintf(buf, max, "\t(queue empty)\n");
+			if (code <= 0)
+				break;
+			code = min(code, (int) max);
+			buf += code;
+			max -= code;
+			break;
+		}
+		list_for_each_entry(req, &ep->req_list, list) {
+			code = snprintf(buf, max, "\treq %p, %s%s%d/%d\n",
+					req,
+					req->zero ? "zero, " : "",
+					req->short_not_ok ? "!short, " : "",
+					req->actual, req->length);
+			if (code <= 0)
+				break;
+			code = min(code, (int) max);
+			buf += code;
+			max -= code;
+		}
+	} while (0);
+	return buf - buffer;
+}
+#endif
+
+static int
+dump_end_info(struct musb *musb, u8 epnum, char *aBuffer, unsigned max)
+{
+	int			code = 0;
+	char			*buf = aBuffer;
+	struct musb_hw_ep	*hw_ep = &musb->endpoints[epnum];
+
+	do {
+		musb_ep_select(musb->mregs, epnum);
+#ifdef CONFIG_USB_MUSB_HDRC_HCD
+		if (is_host_active(musb)) {
+			int		dump_rx, dump_tx;
+			void __iomem	*regs = hw_ep->regs;
+
+			/* TEMPORARY (!) until we have a real periodic
+			 * schedule tree ...
+			 */
+			if (!epnum) {
+				/* control is shared, uses RX queue
+				 * but (mostly) shadowed tx registers
+				 */
+				dump_tx = !list_empty(&musb->control);
+				dump_rx = 0;
+			} else if (hw_ep == musb->bulk_ep) {
+				dump_tx = !list_empty(&musb->out_bulk);
+				dump_rx = !list_empty(&musb->in_bulk);
+			} else if (musb->periodic[epnum]) {
+				struct usb_host_endpoint	*hep;
+
+				hep = musb->periodic[epnum]->hep;
+				dump_rx = hep->desc.bEndpointAddress
+						& USB_ENDPOINT_DIR_MASK;
+				dump_tx = !dump_rx;
+			} else
+				break;
+			/* END TEMPORARY */
+
+
+			if (dump_rx) {
+				code = snprintf(buf, max,
+					"\nRX%d: %s rxcsr %04x interval %02x "
+					"max %04x type %02x; "
+					"dev %d hub %d port %d"
+					"\n",
+					epnum,
+					hw_ep->rx_double_buffered
+						? "2buf" : "1buf",
+					musb_readw(regs, MUSB_RXCSR),
+					musb_readb(regs, MUSB_RXINTERVAL),
+					musb_readw(regs, MUSB_RXMAXP),
+					musb_readb(regs, MUSB_RXTYPE),
+					/* FIXME:  assumes multipoint */
+					musb_readb(musb->mregs,
+						MUSB_BUSCTL_OFFSET(epnum,
+						MUSB_RXFUNCADDR)),
+					musb_readb(musb->mregs,
+						MUSB_BUSCTL_OFFSET(epnum,
+						MUSB_RXHUBADDR)),
+					musb_readb(musb->mregs,
+						MUSB_BUSCTL_OFFSET(epnum,
+						MUSB_RXHUBPORT))
+					);
+				if (code <= 0)
+					break;
+				code = min(code, (int) max);
+				buf += code;
+				max -= code;
+
+				if (is_cppi_enabled()
+						&& epnum
+						&& hw_ep->rx_channel) {
+					unsigned	cppi = epnum - 1;
+					unsigned	off1 = cppi << 2;
+					void __iomem	*base;
+					void __iomem	*ram;
+					char		tmp[16];
+
+					base = musb->ctrl_base;
+					ram = DAVINCI_RXCPPI_STATERAM_OFFSET(
+							cppi) + base;
+					snprintf(tmp, sizeof tmp, "%d left, ",
+						musb_readl(base,
+						DAVINCI_RXCPPI_BUFCNT0_REG
+								+ off1));
+
+					code = snprintf(buf, max,
+						"    rx dma%d: %s"
+						"%08x %08x, %08x %08x; "
+						"%08x %08x %08x .. %08x\n",
+						cppi, tmp,
+						musb_readl(ram, 0 * 4),
+						musb_readl(ram, 1 * 4),
+						musb_readl(ram, 2 * 4),
+						musb_readl(ram, 3 * 4),
+						musb_readl(ram, 4 * 4),
+						musb_readl(ram, 5 * 4),
+						musb_readl(ram, 6 * 4),
+						musb_readl(ram, 7 * 4));
+					if (code <= 0)
+						break;
+					code = min(code, (int) max);
+					buf += code;
+					max -= code;
+				}
+
+				if (hw_ep == musb->bulk_ep
+						&& !list_empty(
+							&musb->in_bulk)) {
+					code = dump_queue(&musb->in_bulk,
+							buf, max);
+					if (code <= 0)
+						break;
+					code = min(code, (int) max);
+					buf += code;
+					max -= code;
+				} else if (musb->periodic[epnum]) {
+					code = dump_qh(musb->periodic[epnum],
+							buf, max);
+					if (code <= 0)
+						break;
+					code = min(code, (int) max);
+					buf += code;
+					max -= code;
+				}
+			}
+
+			if (dump_tx) {
+				code = snprintf(buf, max,
+					"\nTX%d: %s txcsr %04x interval %02x "
+					"max %04x type %02x; "
+					"dev %d hub %d port %d"
+					"\n",
+					epnum,
+					hw_ep->tx_double_buffered
+						? "2buf" : "1buf",
+					musb_readw(regs, MUSB_TXCSR),
+					musb_readb(regs, MUSB_TXINTERVAL),
+					musb_readw(regs, MUSB_TXMAXP),
+					musb_readb(regs, MUSB_TXTYPE),
+					/* FIXME:  assumes multipoint */
+					musb_readb(musb->mregs,
+						MUSB_BUSCTL_OFFSET(epnum,
+						MUSB_TXFUNCADDR)),
+					musb_readb(musb->mregs,
+						MUSB_BUSCTL_OFFSET(epnum,
+						MUSB_TXHUBADDR)),
+					musb_readb(musb->mregs,
+						MUSB_BUSCTL_OFFSET(epnum,
+						MUSB_TXHUBPORT))
+					);
+				if (code <= 0)
+					break;
+				code = min(code, (int) max);
+				buf += code;
+				max -= code;
+
+				if (is_cppi_enabled()
+						&& epnum
+						&& hw_ep->tx_channel) {
+					unsigned	cppi = epnum - 1;
+					void __iomem	*base;
+					void __iomem	*ram;
+
+					base = musb->ctrl_base;
+					ram = DAVINCI_RXCPPI_STATERAM_OFFSET(
+							cppi) + base;
+					code = snprintf(buf, max,
+						"    tx dma%d: "
+						"%08x %08x, %08x %08x; "
+						"%08x %08x %08x .. %08x\n",
+						cppi,
+						musb_readl(ram, 0 * 4),
+						musb_readl(ram, 1 * 4),
+						musb_readl(ram, 2 * 4),
+						musb_readl(ram, 3 * 4),
+						musb_readl(ram, 4 * 4),
+						musb_readl(ram, 5 * 4),
+						musb_readl(ram, 6 * 4),
+						musb_readl(ram, 7 * 4));
+					if (code <= 0)
+						break;
+					code = min(code, (int) max);
+					buf += code;
+					max -= code;
+				}
+
+				if (hw_ep == musb->control_ep
+						&& !list_empty(
+							&musb->control)) {
+					code = dump_queue(&musb->control,
+							buf, max);
+					if (code <= 0)
+						break;
+					code = min(code, (int) max);
+					buf += code;
+					max -= code;
+				} else if (hw_ep == musb->bulk_ep
+						&& !list_empty(
+							&musb->out_bulk)) {
+					code = dump_queue(&musb->out_bulk,
+							buf, max);
+					if (code <= 0)
+						break;
+					code = min(code, (int) max);
+					buf += code;
+					max -= code;
+				} else if (musb->periodic[epnum]) {
+					code = dump_qh(musb->periodic[epnum],
+							buf, max);
+					if (code <= 0)
+						break;
+					code = min(code, (int) max);
+					buf += code;
+					max -= code;
+				}
+			}
+		}
+#endif
+#ifdef CONFIG_USB_GADGET_MUSB_HDRC
+		if (is_peripheral_active(musb)) {
+			code = 0;
+
+			if (hw_ep->ep_in.desc || !epnum) {
+				code = dump_ep(&hw_ep->ep_in, buf, max);
+				if (code <= 0)
+					break;
+				code = min(code, (int) max);
+				buf += code;
+				max -= code;
+			}
+			if (hw_ep->ep_out.desc) {
+				code = dump_ep(&hw_ep->ep_out, buf, max);
+				if (code <= 0)
+					break;
+				code = min(code, (int) max);
+				buf += code;
+				max -= code;
+			}
+		}
+#endif
+	} while (0);
+
+	return buf - aBuffer;
+}
+
+/* Dump the current status and compile options.
+ * @param musb the device driver instance
+ * @param buffer where to dump the status; it must be big enough to hold the
+ * result otherwise "BAD THINGS HAPPENS(TM)".
+ */
+static int dump_header_stats(struct musb *musb, char *buffer)
+{
+	int code, count = 0;
+	const void __iomem *mbase = musb->mregs;
+
+	*buffer = 0;
+	count = sprintf(buffer, "Status: %sHDRC, Mode=%s "
+				"(Power=%02x, DevCtl=%02x)\n",
+			(musb->is_multipoint ? "M" : ""), MUSB_MODE(musb),
+			musb_readb(mbase, MUSB_POWER),
+			musb_readb(mbase, MUSB_DEVCTL));
+	if (count <= 0)
+		return 0;
+	buffer += count;
+
+	code = sprintf(buffer, "OTG state: %s; %sactive\n",
+			otg_state_string(musb),
+			musb->is_active ? "" : "in");
+	if (code <= 0)
+		goto done;
+	buffer += code;
+	count += code;
+
+	code = sprintf(buffer,
+			"Options: "
+#ifdef CONFIG_MUSB_PIO_ONLY
+			"pio"
+#elif defined(CONFIG_USB_TI_CPPI_DMA)
+			"cppi-dma"
+#elif defined(CONFIG_USB_INVENTRA_DMA)
+			"musb-dma"
+#elif defined(CONFIG_USB_TUSB_OMAP_DMA)
+			"tusb-omap-dma"
+#else
+			"?dma?"
+#endif
+			", "
+#ifdef CONFIG_USB_MUSB_OTG
+			"otg (peripheral+host)"
+#elif defined(CONFIG_USB_GADGET_MUSB_HDRC)
+			"peripheral"
+#elif defined(CONFIG_USB_MUSB_HDRC_HCD)
+			"host"
+#endif
+			", debug=%d [eps=%d]\n",
+		debug,
+		musb->nr_endpoints);
+	if (code <= 0)
+		goto done;
+	count += code;
+	buffer += code;
+
+#ifdef	CONFIG_USB_GADGET_MUSB_HDRC
+	code = sprintf(buffer, "Peripheral address: %02x\n",
+			musb_readb(musb->ctrl_base, MUSB_FADDR));
+	if (code <= 0)
+		goto done;
+	buffer += code;
+	count += code;
+#endif
+
+#ifdef	CONFIG_USB_MUSB_HDRC_HCD
+	code = sprintf(buffer, "Root port status: %08x\n",
+			musb->port1_status);
+	if (code <= 0)
+		goto done;
+	buffer += code;
+	count += code;
+#endif
+
+#ifdef	CONFIG_ARCH_DAVINCI
+	code = sprintf(buffer,
+			"DaVinci: ctrl=%02x stat=%1x phy=%03x\n"
+			"\trndis=%05x auto=%04x intsrc=%08x intmsk=%08x"
+			"\n",
+			musb_readl(musb->ctrl_base, DAVINCI_USB_CTRL_REG),
+			musb_readl(musb->ctrl_base, DAVINCI_USB_STAT_REG),
+			__raw_readl((void __force __iomem *)
+					IO_ADDRESS(USBPHY_CTL_PADDR)),
+			musb_readl(musb->ctrl_base, DAVINCI_RNDIS_REG),
+			musb_readl(musb->ctrl_base, DAVINCI_AUTOREQ_REG),
+			musb_readl(musb->ctrl_base,
+					DAVINCI_USB_INT_SOURCE_REG),
+			musb_readl(musb->ctrl_base,
+					DAVINCI_USB_INT_MASK_REG));
+	if (code <= 0)
+		goto done;
+	count += code;
+	buffer += code;
+#endif	/* DAVINCI */
+
+#ifdef CONFIG_USB_TUSB6010
+	code = sprintf(buffer,
+			"TUSB6010: devconf %08x, phy enable %08x drive %08x"
+			"\n\totg %03x timer %08x"
+			"\n\tprcm conf %08x mgmt %08x; int src %08x mask %08x"
+			"\n",
+			musb_readl(musb->ctrl_base, TUSB_DEV_CONF),
+			musb_readl(musb->ctrl_base, TUSB_PHY_OTG_CTRL_ENABLE),
+			musb_readl(musb->ctrl_base, TUSB_PHY_OTG_CTRL),
+			musb_readl(musb->ctrl_base, TUSB_DEV_OTG_STAT),
+			musb_readl(musb->ctrl_base, TUSB_DEV_OTG_TIMER),
+			musb_readl(musb->ctrl_base, TUSB_PRCM_CONF),
+			musb_readl(musb->ctrl_base, TUSB_PRCM_MNGMT),
+			musb_readl(musb->ctrl_base, TUSB_INT_SRC),
+			musb_readl(musb->ctrl_base, TUSB_INT_MASK));
+	if (code <= 0)
+		goto done;
+	count += code;
+	buffer += code;
+#endif	/* DAVINCI */
+
+	if (is_cppi_enabled() && musb->dma_controller) {
+		code = sprintf(buffer,
+				"CPPI: txcr=%d txsrc=%01x txena=%01x; "
+				"rxcr=%d rxsrc=%01x rxena=%01x "
+				"\n",
+				musb_readl(musb->ctrl_base,
+						DAVINCI_TXCPPI_CTRL_REG),
+				musb_readl(musb->ctrl_base,
+						DAVINCI_TXCPPI_RAW_REG),
+				musb_readl(musb->ctrl_base,
+						DAVINCI_TXCPPI_INTENAB_REG),
+				musb_readl(musb->ctrl_base,
+						DAVINCI_RXCPPI_CTRL_REG),
+				musb_readl(musb->ctrl_base,
+						DAVINCI_RXCPPI_RAW_REG),
+				musb_readl(musb->ctrl_base,
+						DAVINCI_RXCPPI_INTENAB_REG));
+		if (code <= 0)
+			goto done;
+		count += code;
+		buffer += code;
+	}
+
+#ifdef CONFIG_USB_GADGET_MUSB_HDRC
+	if (is_peripheral_enabled(musb)) {
+		code = sprintf(buffer, "Gadget driver: %s\n",
+				musb->gadget_driver
+					? musb->gadget_driver->driver.name
+					: "(none)");
+		if (code <= 0)
+			goto done;
+		count += code;
+		buffer += code;
+	}
+#endif
+
+done:
+	return count;
+}
+
+/* Write to ProcFS
+ *
+ * C soft-connect
+ * c soft-disconnect
+ * I enable HS
+ * i disable HS
+ * s stop session
+ * F force session (OTG-unfriendly)
+ * E rElinquish bus (OTG)
+ * H request host mode
+ * h cancel host request
+ * T start sending TEST_PACKET
+ * D<num> set/query the debug level
+ */
+static int musb_proc_write(struct file *file, const char __user *buffer,
+			unsigned long count, void *data)
+{
+	char cmd;
+	u8 reg;
+	struct musb *musb = (struct musb *)data;
+	void __iomem *mbase = musb->mregs;
+
+	/* MOD_INC_USE_COUNT; */
+
+	if (unlikely(copy_from_user(&cmd, buffer, 1)))
+		return -EFAULT;
+
+	switch (cmd) {
+	case 'C':
+		if (mbase) {
+			reg = musb_readb(mbase, MUSB_POWER)
+					| MUSB_POWER_SOFTCONN;
+			musb_writeb(mbase, MUSB_POWER, reg);
+		}
+		break;
+
+	case 'c':
+		if (mbase) {
+			reg = musb_readb(mbase, MUSB_POWER)
+					& ~MUSB_POWER_SOFTCONN;
+			musb_writeb(mbase, MUSB_POWER, reg);
+		}
+		break;
+
+	case 'I':
+		if (mbase) {
+			reg = musb_readb(mbase, MUSB_POWER)
+					| MUSB_POWER_HSENAB;
+			musb_writeb(mbase, MUSB_POWER, reg);
+		}
+		break;
+
+	case 'i':
+		if (mbase) {
+			reg = musb_readb(mbase, MUSB_POWER)
+					& ~MUSB_POWER_HSENAB;
+			musb_writeb(mbase, MUSB_POWER, reg);
+		}
+		break;
+
+	case 'F':
+		reg = musb_readb(mbase, MUSB_DEVCTL);
+		reg |= MUSB_DEVCTL_SESSION;
+		musb_writeb(mbase, MUSB_DEVCTL, reg);
+		break;
+
+	case 'H':
+		if (mbase) {
+			reg = musb_readb(mbase, MUSB_DEVCTL);
+			reg |= MUSB_DEVCTL_HR;
+			musb_writeb(mbase, MUSB_DEVCTL, reg);
+			/* MUSB_HST_MODE( ((struct musb*)data) ); */
+			/* WARNING("Host Mode\n"); */
+		}
+		break;
+
+	case 'h':
+		if (mbase) {
+			reg = musb_readb(mbase, MUSB_DEVCTL);
+			reg &= ~MUSB_DEVCTL_HR;
+			musb_writeb(mbase, MUSB_DEVCTL, reg);
+		}
+		break;
+
+	case 'T':
+		if (mbase) {
+			musb_load_testpacket(musb);
+			musb_writeb(mbase, MUSB_TESTMODE,
+					MUSB_TEST_PACKET);
+		}
+		break;
+
+#if (MUSB_DEBUG > 0)
+		/* set/read debug level */
+	case 'D':{
+			if (count > 1) {
+				char digits[8], *p = digits;
+				int i = 0, level = 0, sign = 1;
+				int len = min(count - 1, (unsigned long)8);
+
+				if (copy_from_user(&digits, &buffer[1], len))
+					return -EFAULT;
+
+				/* optional sign */
+				if (*p == '-') {
+					len -= 1;
+					sign = -sign;
+					p++;
+				}
+
+				/* read it */
+				while (i++ < len && *p > '0' && *p < '9') {
+					level = level * 10 + (*p - '0');
+					p++;
+				}
+
+				level *= sign;
+				DBG(1, "debug level %d\n", level);
+				debug = level;
+			}
+		}
+		break;
+
+
+	case '?':
+		INFO("?: you are seeing it\n");
+		INFO("C/c: soft connect enable/disable\n");
+		INFO("I/i: hispeed enable/disable\n");
+		INFO("F: force session start\n");
+		INFO("H: host mode\n");
+		INFO("T: start sending TEST_PACKET\n");
+		INFO("D: set/read dbug level\n");
+		break;
+#endif
+
+	default:
+		ERR("Command %c not implemented\n", cmd);
+		break;
+	}
+
+	musb_platform_try_idle(musb, 0);
+
+	return count;
+}
+
+static int musb_proc_read(char *page, char **start,
+			off_t off, int count, int *eof, void *data)
+{
+	char *buffer = page;
+	int code = 0;
+	unsigned long	flags;
+	struct musb	*musb = data;
+	unsigned	epnum;
+
+	count -= off;
+	count -= 1;		/* for NUL at end */
+	if (count <= 0)
+		return -EINVAL;
+
+	spin_lock_irqsave(&musb->lock, flags);
+
+	code = dump_header_stats(musb, buffer);
+	if (code > 0) {
+		buffer += code;
+		count -= code;
+	}
+
+	/* generate the report for the end points */
+	/* REVISIT ... not unless something's connected! */
+	for (epnum = 0; count >= 0 && epnum < musb->nr_endpoints;
+			epnum++) {
+		code = dump_end_info(musb, epnum, buffer, count);
+		if (code > 0) {
+			buffer += code;
+			count -= code;
+		}
+	}
+
+	musb_platform_try_idle(musb, 0);
+
+	spin_unlock_irqrestore(&musb->lock, flags);
+	*eof = 1;
+
+	return buffer - page;
+}
+
+void __devexit musb_debug_delete(char *name, struct musb *musb)
+{
+	if (musb->proc_entry)
+		remove_proc_entry(name, NULL);
+}
+
+struct proc_dir_entry *__init
+musb_debug_create(char *name, struct musb *data)
+{
+	struct proc_dir_entry	*pde;
+
+	/* FIXME convert everything to seq_file; then later, debugfs */
+
+	if (!name)
+		return NULL;
+
+	pde = create_proc_entry(name, S_IFREG | S_IRUGO | S_IWUSR, NULL);
+	data->proc_entry = pde;
+	if (pde) {
+		pde->data = data;
+		/* pde->owner = THIS_MODULE; */
+
+		pde->read_proc = musb_proc_read;
+		pde->write_proc = musb_proc_write;
+
+		pde->size = 0;
+
+		pr_debug("Registered /proc/%s\n", name);
+	} else {
+		pr_debug("Cannot create a valid proc file entry");
+	}
+
+	return pde;
+}