Date:   Tue, 3 Jul 2018 20:57:53 +0100
From:   Pawel Laszczak <pawell@...ence.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        <linux-usb@...r.kernel.org>, Felipe Balbi <balbi@...nel.org>
CC:     <linux-kernel@...r.kernel.org>, <ltyrala@...ence.com>,
        <pawell@...ence.com>
Subject: [PATCH 09/15] Introduce Cadence USBSSP DRD Driver - added debugfs files.

Signed-off-by: Laszczak Pawel <pawell@...ence.com>
---
 drivers/usb/usbssp/gadget-debugfs.c | 514 ++++++++++++++++++++++++++++
 drivers/usb/usbssp/gadget-debugfs.h | 137 ++++++++
 2 files changed, 651 insertions(+)
 create mode 100644 drivers/usb/usbssp/gadget-debugfs.c
 create mode 100644 drivers/usb/usbssp/gadget-debugfs.h

diff --git a/drivers/usb/usbssp/gadget-debugfs.c b/drivers/usb/usbssp/gadget-debugfs.c
new file mode 100644
index 000000000000..c0d1e96728e6
--- /dev/null
+++ b/drivers/usb/usbssp/gadget-debugfs.c
@@ -0,0 +1,514 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * USBSSP device controller driver
+ *
+ * Copyright (C) 2018 Cadence.
+ *
+ * Author: Pawel Laszczak
+ * Some code borrowed from the Linux XHCI driver.
+ */
+
+#include <linux/slab.h>
+
+#include "gadget.h"
+#include "gadget-debugfs.h"
+
+static const struct debugfs_reg32 usbssp_cap_regs[] = {
+	dump_register(CAPLENGTH),
+	dump_register(HCSPARAMS1),
+	dump_register(HCSPARAMS2),
+	dump_register(HCSPARAMS3),
+	dump_register(HCCPARAMS1),
+	dump_register(DOORBELLOFF),
+	dump_register(RUNTIMEOFF),
+	dump_register(HCCPARAMS2),
+};
+
+static const struct debugfs_reg32 usbssp_op_regs[] = {
+	dump_register(USBCMD),
+	dump_register(USBSTS),
+	dump_register(PAGESIZE),
+	dump_register(DNCTRL),
+	dump_register(CRCR),
+	dump_register(DCBAAP_LOW),
+	dump_register(DCBAAP_HIGH),
+	dump_register(CONFIG),
+};
+
+static const struct debugfs_reg32 usbssp_runtime_regs[] = {
+	dump_register(MFINDEX),
+	dump_register(IR0_IMAN),
+	dump_register(IR0_IMOD),
+	dump_register(IR0_ERSTSZ),
+	dump_register(IR0_ERSTBA_LOW),
+	dump_register(IR0_ERSTBA_HIGH),
+	dump_register(IR0_ERDP_LOW),
+	dump_register(IR0_ERDP_HIGH),
+};
+
+static const struct debugfs_reg32 usbssp_extcap_legsup[] = {
+	dump_register(EXTCAP_USBLEGSUP),
+	dump_register(EXTCAP_USBLEGCTLSTS),
+};
+
+static const struct debugfs_reg32 usbssp_extcap_protocol[] = {
+	dump_register(EXTCAP_REVISION),
+	dump_register(EXTCAP_NAME),
+	dump_register(EXTCAP_PORTINFO),
+	dump_register(EXTCAP_PORTTYPE),
+	dump_register(EXTCAP_MANTISSA1),
+	dump_register(EXTCAP_MANTISSA2),
+	dump_register(EXTCAP_MANTISSA3),
+	dump_register(EXTCAP_MANTISSA4),
+	dump_register(EXTCAP_MANTISSA5),
+	dump_register(EXTCAP_MANTISSA6),
+};
+
+static const struct debugfs_reg32 usbssp_extcap_dbc[] = {
+	dump_register(EXTCAP_DBC_CAPABILITY),
+	dump_register(EXTCAP_DBC_DOORBELL),
+	dump_register(EXTCAP_DBC_ERSTSIZE),
+	dump_register(EXTCAP_DBC_ERST_LOW),
+	dump_register(EXTCAP_DBC_ERST_HIGH),
+	dump_register(EXTCAP_DBC_ERDP_LOW),
+	dump_register(EXTCAP_DBC_ERDP_HIGH),
+	dump_register(EXTCAP_DBC_CONTROL),
+	dump_register(EXTCAP_DBC_STATUS),
+	dump_register(EXTCAP_DBC_PORTSC),
+	dump_register(EXTCAP_DBC_CONT_LOW),
+	dump_register(EXTCAP_DBC_CONT_HIGH),
+	dump_register(EXTCAP_DBC_DEVINFO1),
+	dump_register(EXTCAP_DBC_DEVINFO2),
+};
+
+static struct dentry *usbssp_debugfs_root;
+
+static struct usbssp_regset *usbssp_debugfs_alloc_regset(
+				struct usbssp_udc *usbssp_data)
+{
+	struct usbssp_regset *regset;
+
+	regset = kzalloc(sizeof(*regset), GFP_KERNEL);
+	if (!regset)
+		return NULL;
+
+	/*
+	 * The allocation and free of regset are executed in order.
+	 * We needn't a lock here.
+	 */
+	INIT_LIST_HEAD(&regset->list);
+	list_add_tail(&regset->list, &usbssp_data->regset_list);
+
+	return regset;
+}
+
+static void usbssp_debugfs_free_regset(struct usbssp_regset *regset)
+{
+	if (!regset)
+		return;
+
+	list_del(&regset->list);
+	kfree(regset);
+}
+
+static void usbssp_debugfs_regset(struct usbssp_udc *usbssp_data, u32 base,
+				  const struct debugfs_reg32 *regs,
+				  size_t nregs, struct dentry *parent,
+				  const char *fmt, ...)
+{
+	struct usbssp_regset *rgs;
+	va_list args;
+	struct debugfs_regset32	*regset;
+
+	rgs = usbssp_debugfs_alloc_regset(usbssp_data);
+	if (!rgs)
+		return;
+
+	va_start(args, fmt);
+	vsnprintf(rgs->name, sizeof(rgs->name), fmt, args);
+	va_end(args);
+
+	regset = &rgs->regset;
+	regset->regs = regs;
+	regset->nregs = nregs;
+	regset->base = usbssp_data->regs + base;
+
+	debugfs_create_regset32((const char *)rgs->name, 0444, parent, regset);
+}
+
+static void usbssp_debugfs_extcap_regset(struct usbssp_udc *usbssp_data,
+					 int cap_id,
+					 const struct debugfs_reg32 *regs,
+					 size_t n, const char *cap_name)
+{
+	u32 offset;
+	int index = 0;
+	size_t psic, nregs = n;
+	void __iomem *base = &usbssp_data->cap_regs->hc_capbase;
+
+	offset = usbssp_find_next_ext_cap(base, 0, cap_id);
+	while (offset) {
+		if (cap_id == USBSSP_EXT_CAPS_PROTOCOL) {
+			psic = USBSSP_EXT_PORT_PSIC(readl(base + offset + 8));
+			nregs = min(4 + psic, n);
+		}
+
+		usbssp_debugfs_regset(usbssp_data, offset, regs, nregs,
+				usbssp_data->debugfs_root, "%s:%02d",
+				cap_name, index);
+		offset = usbssp_find_next_ext_cap(base, offset, cap_id);
+		index++;
+	}
+}
+
+static int usbssp_ring_enqueue_show(struct seq_file *s, void *unused)
+{
+	dma_addr_t dma;
+	struct usbssp_ring *ring = *(struct usbssp_ring **)s->private;
+
+	dma = usbssp_trb_virt_to_dma(ring->enq_seg, ring->enqueue);
+	seq_printf(s, "%pad\n", &dma);
+
+	return 0;
+}
+
+static int usbssp_ring_dequeue_show(struct seq_file *s, void *unused)
+{
+	dma_addr_t dma;
+	struct usbssp_ring *ring = *(struct usbssp_ring **)s->private;
+
+	dma = usbssp_trb_virt_to_dma(ring->deq_seg, ring->dequeue);
+	seq_printf(s, "%pad\n", &dma);
+
+	return 0;
+}
+
+static int usbssp_ring_cycle_show(struct seq_file *s, void *unused)
+{
+	struct usbssp_ring *ring = *(struct usbssp_ring **)s->private;
+
+	seq_printf(s, "%d\n", ring->cycle_state);
+
+	return 0;
+}
+
+static void usbssp_ring_dump_segment(struct seq_file *s,
+				     struct usbssp_segment *seg)
+{
+	int i;
+	dma_addr_t dma;
+	union usbssp_trb *trb;
+
+	for (i = 0; i < TRBS_PER_SEGMENT; i++) {
+		trb = &seg->trbs[i];
+		dma = seg->dma + i * sizeof(*trb);
+		seq_printf(s, "%pad: %s\n", &dma,
+				usbssp_decode_trb(trb->generic.field[0],
+					trb->generic.field[1],
+					trb->generic.field[2],
+					trb->generic.field[3]));
+	}
+}
+
+static int usbssp_ring_trb_show(struct seq_file *s, void *unused)
+{
+	int i;
+	struct usbssp_ring *ring = *(struct usbssp_ring **)s->private;
+	struct usbssp_segment *seg = ring->first_seg;
+
+	for (i = 0; i < ring->num_segs; i++) {
+		usbssp_ring_dump_segment(s, seg);
+		seg = seg->next;
+	}
+
+	return 0;
+}
+
+static struct usbssp_file_map ring_files[] = {
+	{"enqueue",	usbssp_ring_enqueue_show, },
+	{"dequeue",	usbssp_ring_dequeue_show, },
+	{"cycle",	usbssp_ring_cycle_show, },
+	{"trbs",	usbssp_ring_trb_show, },
+};
+
+static int usbssp_ring_open(struct inode *inode, struct file *file)
+{
+	int i;
+	struct usbssp_file_map *f_map;
+	const char *file_name = file_dentry(file)->d_iname;
+
+	for (i = 0; i < ARRAY_SIZE(ring_files); i++) {
+		f_map = &ring_files[i];
+
+		if (strcmp(f_map->name, file_name) == 0)
+			break;
+	}
+
+	return single_open(file, f_map->show, inode->i_private);
+	return 0;
+}
+
+static const struct file_operations usbssp_ring_fops = {
+	.open = usbssp_ring_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+static int usbssp_slot_context_show(struct seq_file *s, void *unused)
+{
+	struct usbssp_udc *usbssp_data;
+	struct usbssp_slot_ctx *slot_ctx;
+	struct usbssp_slot_priv *priv = s->private;
+	struct usbssp_device *dev = priv->dev;
+
+	usbssp_data = gadget_to_usbssp(dev->gadget);
+	slot_ctx = usbssp_get_slot_ctx(usbssp_data, dev->out_ctx);
+	seq_printf(s, "%pad: %s\n", &dev->out_ctx->dma,
+		   usbssp_decode_slot_context(slot_ctx->dev_info,
+				slot_ctx->dev_info2, slot_ctx->int_target,
+				slot_ctx->dev_state));
+
+	return 0;
+}
+
+static int usbssp_endpoint_context_show(struct seq_file *s, void *unused)
+{
+	int dci;
+	dma_addr_t dma;
+	struct usbssp_udc *usbssp_data;
+	struct usbssp_ep_ctx *ep_ctx;
+	struct usbssp_slot_priv	*priv = s->private;
+	struct usbssp_device *dev = priv->dev;
+
+	usbssp_data = gadget_to_usbssp(dev->gadget);
+
+	for (dci = 1; dci < 32; dci++) {
+		ep_ctx = usbssp_get_ep_ctx(usbssp_data, dev->out_ctx, dci);
+		dma = dev->out_ctx->dma +
+		      dci * CTX_SIZE(usbssp_data->hcc_params);
+		seq_printf(s, "%pad: %s\n", &dma,
+			   usbssp_decode_ep_context(ep_ctx->ep_info,
+					ep_ctx->ep_info2, ep_ctx->deq,
+					ep_ctx->tx_info));
+	}
+
+	return 0;
+}
+
+static int usbssp_device_name_show(struct seq_file *s, void *unused)
+{
+	struct usbssp_slot_priv *priv = s->private;
+	struct usbssp_device *dev = priv->dev;
+
+	seq_printf(s, "%s\n", dev_name(&dev->gadget->dev));
+
+	return 0;
+}
+
+static struct usbssp_file_map context_files[] = {
+	{"name",	 usbssp_device_name_show, },
+	{"slot-context", usbssp_slot_context_show, },
+	{"ep-context",	 usbssp_endpoint_context_show, },
+};
+
+static int usbssp_context_open(struct inode *inode, struct file *file)
+{
+	int i;
+	struct usbssp_file_map *f_map;
+	const char *file_name = file_dentry(file)->d_iname;
+
+	for (i = 0; i < ARRAY_SIZE(context_files); i++) {
+		f_map = &context_files[i];
+
+		if (strcmp(f_map->name, file_name) == 0)
+			break;
+	}
+
+	return single_open(file, f_map->show, inode->i_private);
+}
+
+static const struct file_operations usbssp_context_fops = {
+	.open		= usbssp_context_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+static void usbssp_debugfs_create_files(struct usbssp_udc *usbssp_data,
+					struct usbssp_file_map *files,
+					size_t nentries, void *data,
+					struct dentry *parent,
+					const struct file_operations *fops)
+{
+	int i;
+
+	for (i = 0; i < nentries; i++)
+		debugfs_create_file(files[i].name, 0444, parent, data, fops);
+}
+
+static struct dentry *usbssp_debugfs_create_ring_dir(struct usbssp_udc
+						     *usbssp_data,
+						     struct usbssp_ring **ring,
+						     const char *name,
+						     struct dentry *parent)
+{
+	struct dentry *dir;
+
+	dir = debugfs_create_dir(name, parent);
+	usbssp_debugfs_create_files(usbssp_data, ring_files,
+			ARRAY_SIZE(ring_files), ring, dir, &usbssp_ring_fops);
+
+	return dir;
+}
+
+static void usbssp_debugfs_create_context_files(struct usbssp_udc *usbssp_data,
+						struct dentry *parent,
+						int slot_id)
+{
+	struct usbssp_device	*dev = &usbssp_data->devs;
+
+	usbssp_debugfs_create_files(usbssp_data, context_files,
+			ARRAY_SIZE(context_files), dev->debugfs_private,
+			parent, &usbssp_context_fops);
+}
+
+void usbssp_debugfs_create_endpoint(struct usbssp_udc *usbssp_data,
+				    struct usbssp_device *dev,
+				    int ep_index)
+{
+	struct usbssp_ep_priv *epriv;
+	struct usbssp_slot_priv *spriv = dev->debugfs_private;
+
+	if (spriv->eps[ep_index])
+		return;
+
+	epriv = kzalloc(sizeof(*epriv), GFP_KERNEL);
+	if (!epriv)
+		return;
+
+	snprintf(epriv->name, sizeof(epriv->name), "ep%02d", ep_index);
+	epriv->root = usbssp_debugfs_create_ring_dir(usbssp_data,
+				&dev->eps[ep_index].ring, epriv->name,
+				spriv->root);
+	spriv->eps[ep_index] = epriv;
+}
+
+void usbssp_debugfs_remove_endpoint(struct usbssp_udc *usbssp_data,
+				    struct usbssp_device *dev,
+				    int ep_index)
+{
+	struct usbssp_ep_priv *epriv;
+	struct usbssp_slot_priv *spriv = dev->debugfs_private;
+
+	if (!spriv || !spriv->eps[ep_index])
+		return;
+
+	epriv = spriv->eps[ep_index];
+	debugfs_remove_recursive(epriv->root);
+	spriv->eps[ep_index] = NULL;
+	kfree(epriv);
+}
+
+void usbssp_debugfs_create_slot(struct usbssp_udc *usbssp_data, int slot_id)
+{
+	struct usbssp_slot_priv *priv;
+	struct usbssp_device *dev = &usbssp_data->devs;
+
+	priv = kzalloc(sizeof(*priv), GFP_ATOMIC);
+	if (!priv)
+		return;
+
+	snprintf(priv->name, sizeof(priv->name), "%02d", slot_id);
+	priv->root = debugfs_create_dir(priv->name, usbssp_data->debugfs_slots);
+	priv->dev = dev;
+	dev->debugfs_private = priv;
+
+	usbssp_debugfs_create_ring_dir(usbssp_data, &dev->eps[0].ring,
+			"ep00", priv->root);
+
+	usbssp_debugfs_create_context_files(usbssp_data, priv->root, slot_id);
+}
+
+void usbssp_debugfs_remove_slot(struct usbssp_udc *usbssp_data, int slot_id)
+{
+	int i;
+	struct usbssp_slot_priv *priv;
+	struct usbssp_device *dev = &usbssp_data->devs;
+
+	if (!dev || !dev->debugfs_private)
+		return;
+
+	priv = dev->debugfs_private;
+
+	debugfs_remove_recursive(priv->root);
+
+	for (i = 0; i < 31; i++)
+		kfree(priv->eps[i]);
+
+	kfree(priv);
+	dev->debugfs_private = NULL;
+}
+
+void usbssp_debugfs_init(struct usbssp_udc *usbssp_data)
+{
+	struct device *dev =  usbssp_data->dev;
+
+	usbssp_data->debugfs_root = debugfs_create_dir(dev_name(dev),
+					usbssp_debugfs_root);
+
+	INIT_LIST_HEAD(&usbssp_data->regset_list);
+
+	usbssp_debugfs_regset(usbssp_data,
+			0, usbssp_cap_regs, ARRAY_SIZE(usbssp_cap_regs),
+			usbssp_data->debugfs_root, "reg-cap");
+
+	usbssp_debugfs_regset(usbssp_data,
+			HC_LENGTH(readl(&usbssp_data->cap_regs->hc_capbase)),
+			usbssp_op_regs, ARRAY_SIZE(usbssp_op_regs),
+			usbssp_data->debugfs_root, "reg-op");
+
+	usbssp_debugfs_regset(usbssp_data,
+			readl(&usbssp_data->cap_regs->run_regs_off) & RTSOFF_MASK,
+			usbssp_runtime_regs, ARRAY_SIZE(usbssp_runtime_regs),
+			usbssp_data->debugfs_root, "reg-runtime");
+
+	usbssp_debugfs_extcap_regset(usbssp_data, USBSSP_EXT_CAPS_PROTOCOL,
+			usbssp_extcap_protocol,
+			ARRAY_SIZE(usbssp_extcap_protocol),
+			"reg-ext-protocol");
+
+	usbssp_debugfs_create_ring_dir(usbssp_data, &usbssp_data->cmd_ring,
+			"command-ring",
+			usbssp_data->debugfs_root);
+
+	usbssp_debugfs_create_ring_dir(usbssp_data, &usbssp_data->event_ring,
+			"event-ring",
+			usbssp_data->debugfs_root);
+
+	usbssp_data->debugfs_slots = debugfs_create_dir("devices",
+			usbssp_data->debugfs_root);
+}
+
+void usbssp_debugfs_exit(struct usbssp_udc *usbssp_data)
+{
+	struct usbssp_regset *rgs, *tmp;
+
+	debugfs_remove_recursive(usbssp_data->debugfs_root);
+	usbssp_data->debugfs_root = NULL;
+	usbssp_data->debugfs_slots = NULL;
+
+	list_for_each_entry_safe(rgs, tmp, &usbssp_data->regset_list, list)
+		usbssp_debugfs_free_regset(rgs);
+}
+
+void __init usbssp_debugfs_create_root(void)
+{
+	usbssp_debugfs_root = debugfs_create_dir("usbssp", usb_debug_root);
+}
+
+void __exit usbssp_debugfs_remove_root(void)
+{
+	debugfs_remove_recursive(usbssp_debugfs_root);
+	usbssp_debugfs_root = NULL;
+}
diff --git a/drivers/usb/usbssp/gadget-debugfs.h b/drivers/usb/usbssp/gadget-debugfs.h
new file mode 100644
index 000000000000..53adb028e7f2
--- /dev/null
+++ b/drivers/usb/usbssp/gadget-debugfs.h
@@ -0,0 +1,137 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * USBSSP device controller driver
+ *
+ * Copyright (C) 2018 Cadence.
+ *
+ * Author: Pawel Laszczak
+ * Some code borrowed from the Linux XHCI driver.
+ */
+
+#ifndef __LINUX_USBSSP_DEBUGFS_H
+#define __LINUX_USBSSP_DEBUGFS_H
+
+#include <linux/debugfs.h>
+
+#define DEBUGFS_NAMELEN 32
+
+#define REG_CAPLENGTH		0x00
+#define REG_HCSPARAMS1		0x04
+#define REG_HCSPARAMS2		0x08
+#define REG_HCSPARAMS3		0x0c
+#define REG_HCCPARAMS1		0x10
+#define REG_DOORBELLOFF		0x14
+#define REG_RUNTIMEOFF		0x18
+#define REG_HCCPARAMS2		0x1c
+
+#define	REG_USBCMD		0x00
+#define REG_USBSTS		0x04
+#define REG_PAGESIZE		0x08
+#define REG_DNCTRL		0x14
+#define REG_CRCR		0x18
+#define REG_DCBAAP_LOW		0x30
+#define REG_DCBAAP_HIGH		0x34
+#define REG_CONFIG		0x38
+
+#define REG_MFINDEX		0x00
+#define REG_IR0_IMAN		0x20
+#define REG_IR0_IMOD		0x24
+#define REG_IR0_ERSTSZ		0x28
+#define REG_IR0_ERSTBA_LOW	0x30
+#define REG_IR0_ERSTBA_HIGH	0x34
+#define REG_IR0_ERDP_LOW	0x38
+#define REG_IR0_ERDP_HIGH	0x3c
+
+#define REG_EXTCAP_USBLEGSUP	0x00
+#define REG_EXTCAP_USBLEGCTLSTS	0x04
+
+#define REG_EXTCAP_REVISION	0x00
+#define REG_EXTCAP_NAME		0x04
+#define REG_EXTCAP_PORTINFO	0x08
+#define REG_EXTCAP_PORTTYPE	0x0c
+#define REG_EXTCAP_MANTISSA1	0x10
+#define REG_EXTCAP_MANTISSA2	0x14
+#define REG_EXTCAP_MANTISSA3	0x18
+#define REG_EXTCAP_MANTISSA4	0x1c
+#define REG_EXTCAP_MANTISSA5	0x20
+#define REG_EXTCAP_MANTISSA6	0x24
+
+#define REG_EXTCAP_DBC_CAPABILITY	0x00
+#define REG_EXTCAP_DBC_DOORBELL		0x04
+#define REG_EXTCAP_DBC_ERSTSIZE		0x08
+#define REG_EXTCAP_DBC_ERST_LOW		0x10
+#define REG_EXTCAP_DBC_ERST_HIGH	0x14
+#define REG_EXTCAP_DBC_ERDP_LOW		0x18
+#define REG_EXTCAP_DBC_ERDP_HIGH	0x1c
+#define REG_EXTCAP_DBC_CONTROL		0x20
+#define REG_EXTCAP_DBC_STATUS		0x24
+#define REG_EXTCAP_DBC_PORTSC		0x28
+#define REG_EXTCAP_DBC_CONT_LOW		0x30
+#define REG_EXTCAP_DBC_CONT_HIGH	0x34
+#define REG_EXTCAP_DBC_DEVINFO1		0x38
+#define REG_EXTCAP_DBC_DEVINFO2		0x3c
+
+#define dump_register(nm)		\
+{					\
+	.name	= __stringify(nm),	\
+	.offset	= REG_ ##nm,		\
+}
+
+struct usbssp_regset {
+	char			name[DEBUGFS_NAMELEN];
+	struct debugfs_regset32	regset;
+	size_t			nregs;
+	struct dentry		*parent;
+	struct list_head	list;
+};
+
+struct usbssp_file_map {
+	const char		*name;
+	int			(*show)(struct seq_file *s, void *unused);
+};
+
+struct usbssp_ep_priv {
+	char			name[DEBUGFS_NAMELEN];
+	struct dentry		*root;
+};
+
+struct usbssp_slot_priv {
+	char			name[DEBUGFS_NAMELEN];
+	struct dentry		*root;
+	struct usbssp_ep_priv	*eps[31];
+	struct usbssp_device	*dev;
+};
+
+#ifdef CONFIG_DEBUG_FS
+void usbssp_debugfs_init(struct usbssp_udc *usbssp_data);
+void usbssp_debugfs_exit(struct usbssp_udc *usbssp_data);
+void __init usbssp_debugfs_create_root(void);
+void __exit usbssp_debugfs_remove_root(void);
+void usbssp_debugfs_create_slot(struct usbssp_udc *usbssp_data, int slot_id);
+void usbssp_debugfs_remove_slot(struct usbssp_udc *usbssp_data, int slot_id);
+void usbssp_debugfs_create_endpoint(struct usbssp_udc *usbssp_data,
+				    struct usbssp_device *dev_priv,
+				    int ep_index);
+void usbssp_debugfs_remove_endpoint(struct usbssp_udc *usbssp_data,
+				    struct usbssp_device *dev_priv,
+				    int ep_index);
+#else
+static inline void usbssp_debugfs_init(struct usbssp_udc *usbssp_data) { }
+static inline void usbssp_debugfs_exit(struct usbssp_udc *usbssp_data) { }
+static inline void __init usbssp_debugfs_create_root(void) { }
+static inline void __exit usbssp_debugfs_remove_root(void) { }
+static inline void usbssp_debugfs_create_slot(struct usbssp_udc *usbssp_data,
+					      int s) { }
+static inline void usbssp_debugfs_remove_slot(struct usbssp_udc *xusbssp_data,
+					      int s) { }
+static inline void
+usbssp_debugfs_create_endpoint(struct usbssp_udc *usbssp_data,
+			       struct usbssp_device *dev_priv,
+			       int ep_index) { }
+static inline void
+usbssp_debugfs_remove_endpoint(struct usbssp_udc *usbssp_data,
+			       struct usbssp_device *dev_priv,
+			       int ep_index) { }
+#endif /* CONFIG_DEBUG_FS */
+#endif /*__LINUX_USBSSP_DEBUGFS_H*/
-- 
2.17.1

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