[linux-2.6-block.git] / drivers / usb / musb / musb_debugfs.c

// SPDX-License-Identifier: GPL-2.0
/*
 * MUSB OTG driver debugfs support
 *
 * Copyright 2010 Nokia Corporation
 * Contact: Felipe Balbi <felipe.balbi@nokia.com>
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>

#include <linux/uaccess.h>

#include "musb_core.h"
#include "musb_debug.h"

struct musb_register_map {
	char			*name;
	unsigned		offset;
	unsigned		size;
};

static const struct musb_register_map musb_regmap[] = {
	{ "FAddr",	MUSB_FADDR,	8 },
	{ "Power",	MUSB_POWER,	8 },
	{ "Frame",	MUSB_FRAME,	16 },
	{ "Index",	MUSB_INDEX,	8 },
	{ "Testmode",	MUSB_TESTMODE,	8 },
	{ "TxMaxPp",	MUSB_TXMAXP,	16 },
	{ "TxCSRp",	MUSB_TXCSR,	16 },
	{ "RxMaxPp",	MUSB_RXMAXP,	16 },
	{ "RxCSR",	MUSB_RXCSR,	16 },
	{ "RxCount",	MUSB_RXCOUNT,	16 },
	{ "IntrRxE",	MUSB_INTRRXE,	16 },
	{ "IntrTxE",	MUSB_INTRTXE,	16 },
	{ "IntrUsbE",	MUSB_INTRUSBE,	8 },
	{ "DevCtl",	MUSB_DEVCTL,	8 },
	{ "VControl",	0x68,		32 },
	{ "HWVers",	MUSB_HWVERS,	16 },
	{ "LinkInfo",	MUSB_LINKINFO,	8 },
	{ "VPLen",	MUSB_VPLEN,	8 },
	{ "HS_EOF1",	MUSB_HS_EOF1,	8 },
	{ "FS_EOF1",	MUSB_FS_EOF1,	8 },
	{ "LS_EOF1",	MUSB_LS_EOF1,	8 },
	{ "SOFT_RST",	0x7F,		8 },
	{ "DMA_CNTLch0",	0x204,	16 },
	{ "DMA_ADDRch0",	0x208,	32 },
	{ "DMA_COUNTch0",	0x20C,	32 },
	{ "DMA_CNTLch1",	0x214,	16 },
	{ "DMA_ADDRch1",	0x218,	32 },
	{ "DMA_COUNTch1",	0x21C,	32 },
	{ "DMA_CNTLch2",	0x224,	16 },
	{ "DMA_ADDRch2",	0x228,	32 },
	{ "DMA_COUNTch2",	0x22C,	32 },
	{ "DMA_CNTLch3",	0x234,	16 },
	{ "DMA_ADDRch3",	0x238,	32 },
	{ "DMA_COUNTch3",	0x23C,	32 },
	{ "DMA_CNTLch4",	0x244,	16 },
	{ "DMA_ADDRch4",	0x248,	32 },
	{ "DMA_COUNTch4",	0x24C,	32 },
	{ "DMA_CNTLch5",	0x254,	16 },
	{ "DMA_ADDRch5",	0x258,	32 },
	{ "DMA_COUNTch5",	0x25C,	32 },
	{ "DMA_CNTLch6",	0x264,	16 },
	{ "DMA_ADDRch6",	0x268,	32 },
	{ "DMA_COUNTch6",	0x26C,	32 },
	{ "DMA_CNTLch7",	0x274,	16 },
	{ "DMA_ADDRch7",	0x278,	32 },
	{ "DMA_COUNTch7",	0x27C,	32 },
	{ "ConfigData",	MUSB_CONFIGDATA,8 },
	{ "BabbleCtl",	MUSB_BABBLE_CTL,8 },
	{ "TxFIFOsz",	MUSB_TXFIFOSZ,	8 },
	{ "RxFIFOsz",	MUSB_RXFIFOSZ,	8 },
	{ "TxFIFOadd",	MUSB_TXFIFOADD,	16 },
	{ "RxFIFOadd",	MUSB_RXFIFOADD,	16 },
	{ "EPInfo",	MUSB_EPINFO,	8 },
	{ "RAMInfo",	MUSB_RAMINFO,	8 },
	{  }	/* Terminating Entry */
};

static int musb_regdump_show(struct seq_file *s, void *unused)
{
	struct musb		*musb = s->private;
	unsigned		i;

	seq_printf(s, "MUSB (M)HDRC Register Dump\n");
	pm_runtime_get_sync(musb->controller);

	for (i = 0; i < ARRAY_SIZE(musb_regmap); i++) {
		switch (musb_regmap[i].size) {
		case 8:
			seq_printf(s, "%-12s: %02x\n", musb_regmap[i].name,
					musb_readb(musb->mregs, musb_regmap[i].offset));
			break;
		case 16:
			seq_printf(s, "%-12s: %04x\n", musb_regmap[i].name,
					musb_readw(musb->mregs, musb_regmap[i].offset));
			break;
		case 32:
			seq_printf(s, "%-12s: %08x\n", musb_regmap[i].name,
					musb_readl(musb->mregs, musb_regmap[i].offset));
			break;
		}
	}

	pm_runtime_mark_last_busy(musb->controller);
	pm_runtime_put_autosuspend(musb->controller);
	return 0;
}
DEFINE_SHOW_ATTRIBUTE(musb_regdump);

static int musb_test_mode_show(struct seq_file *s, void *unused)
{
	struct musb		*musb = s->private;
	unsigned		test;

	pm_runtime_get_sync(musb->controller);
	test = musb_readb(musb->mregs, MUSB_TESTMODE);
	pm_runtime_mark_last_busy(musb->controller);
	pm_runtime_put_autosuspend(musb->controller);

	if (test == (MUSB_TEST_FORCE_HOST | MUSB_TEST_FORCE_FS))
		seq_printf(s, "force host full-speed\n");

	else if (test == (MUSB_TEST_FORCE_HOST | MUSB_TEST_FORCE_HS))
		seq_printf(s, "force host high-speed\n");

	else if (test == MUSB_TEST_FORCE_HOST)
		seq_printf(s, "force host\n");

	else if (test == MUSB_TEST_FIFO_ACCESS)
		seq_printf(s, "fifo access\n");

	else if (test == MUSB_TEST_FORCE_FS)
		seq_printf(s, "force full-speed\n");

	else if (test == MUSB_TEST_FORCE_HS)
		seq_printf(s, "force high-speed\n");

	else if (test == MUSB_TEST_PACKET)
		seq_printf(s, "test packet\n");

	else if (test == MUSB_TEST_K)
		seq_printf(s, "test K\n");

	else if (test == MUSB_TEST_J)
		seq_printf(s, "test J\n");

	else if (test == MUSB_TEST_SE0_NAK)
		seq_printf(s, "test SE0 NAK\n");

	return 0;
}

static int musb_test_mode_open(struct inode *inode, struct file *file)
{
	return single_open(file, musb_test_mode_show, inode->i_private);
}

static ssize_t musb_test_mode_write(struct file *file,
		const char __user *ubuf, size_t count, loff_t *ppos)
{
	struct seq_file		*s = file->private_data;
	struct musb		*musb = s->private;
	u8			test;
	char			buf[24];

	memset(buf, 0x00, sizeof(buf));

	if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
		return -EFAULT;

	pm_runtime_get_sync(musb->controller);
	test = musb_readb(musb->mregs, MUSB_TESTMODE);
	if (test) {
		dev_err(musb->controller, "Error: test mode is already set. "
			"Please do USB Bus Reset to start a new test.\n");
		goto ret;
	}

	if (strstarts(buf, "force host full-speed"))
		test = MUSB_TEST_FORCE_HOST | MUSB_TEST_FORCE_FS;

	else if (strstarts(buf, "force host high-speed"))
		test = MUSB_TEST_FORCE_HOST | MUSB_TEST_FORCE_HS;

	else if (strstarts(buf, "force host"))
		test = MUSB_TEST_FORCE_HOST;

	else if (strstarts(buf, "fifo access"))
		test = MUSB_TEST_FIFO_ACCESS;

	else if (strstarts(buf, "force full-speed"))
		test = MUSB_TEST_FORCE_FS;

	else if (strstarts(buf, "force high-speed"))
		test = MUSB_TEST_FORCE_HS;

	else if (strstarts(buf, "test packet")) {
		test = MUSB_TEST_PACKET;
		musb_load_testpacket(musb);
	}

	else if (strstarts(buf, "test K"))
		test = MUSB_TEST_K;

	else if (strstarts(buf, "test J"))
		test = MUSB_TEST_J;

	else if (strstarts(buf, "test SE0 NAK"))
		test = MUSB_TEST_SE0_NAK;

	musb_writeb(musb->mregs, MUSB_TESTMODE, test);

ret:
	pm_runtime_mark_last_busy(musb->controller);
	pm_runtime_put_autosuspend(musb->controller);
	return count;
}

static const struct file_operations musb_test_mode_fops = {
	.open			= musb_test_mode_open,
	.write			= musb_test_mode_write,
	.read			= seq_read,
	.llseek			= seq_lseek,
	.release		= single_release,
};

static int musb_softconnect_show(struct seq_file *s, void *unused)
{
	struct musb	*musb = s->private;
	u8		reg;
	int		connect;

	switch (musb_get_state(musb)) {
	case OTG_STATE_A_HOST:
	case OTG_STATE_A_WAIT_BCON:
		pm_runtime_get_sync(musb->controller);

		reg = musb_readb(musb->mregs, MUSB_DEVCTL);
		connect = reg & MUSB_DEVCTL_SESSION ? 1 : 0;

		pm_runtime_mark_last_busy(musb->controller);
		pm_runtime_put_autosuspend(musb->controller);
		break;
	default:
		connect = -1;
	}

	seq_printf(s, "%d\n", connect);

	return 0;
}

static int musb_softconnect_open(struct inode *inode, struct file *file)
{
	return single_open(file, musb_softconnect_show, inode->i_private);
}

static ssize_t musb_softconnect_write(struct file *file,
		const char __user *ubuf, size_t count, loff_t *ppos)
{
	struct seq_file		*s = file->private_data;
	struct musb		*musb = s->private;
	char			buf[2];
	u8			reg;

	memset(buf, 0x00, sizeof(buf));

	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
		return -EFAULT;

	pm_runtime_get_sync(musb->controller);
	if (!strncmp(buf, "0", 1)) {
		switch (musb_get_state(musb)) {
		case OTG_STATE_A_HOST:
			musb_root_disconnect(musb);
			reg = musb_readb(musb->mregs, MUSB_DEVCTL);
			reg &= ~MUSB_DEVCTL_SESSION;
			musb_writeb(musb->mregs, MUSB_DEVCTL, reg);
			break;
		default:
			break;
		}
	} else if (!strncmp(buf, "1", 1)) {
		switch (musb_get_state(musb)) {
		case OTG_STATE_A_WAIT_BCON:
			/*
			 * musb_save_context() called in musb_runtime_suspend()
			 * might cache devctl with SESSION bit cleared during
			 * soft-disconnect, so specifically set SESSION bit
			 * here to preserve it for musb_runtime_resume().
			 */
			musb->context.devctl |= MUSB_DEVCTL_SESSION;
			reg = musb_readb(musb->mregs, MUSB_DEVCTL);
			reg |= MUSB_DEVCTL_SESSION;
			musb_writeb(musb->mregs, MUSB_DEVCTL, reg);
			break;
		default:
			break;
		}
	}

	pm_runtime_mark_last_busy(musb->controller);
	pm_runtime_put_autosuspend(musb->controller);
	return count;
}

/*
 * In host mode, connect/disconnect the bus without physically
 * remove the devices.
 */
static const struct file_operations musb_softconnect_fops = {
	.open			= musb_softconnect_open,
	.write			= musb_softconnect_write,
	.read			= seq_read,
	.llseek			= seq_lseek,
	.release		= single_release,
};

void musb_init_debugfs(struct musb *musb)
{
	struct dentry *root;

	root = debugfs_create_dir(dev_name(musb->controller), usb_debug_root);
	musb->debugfs_root = root;

	debugfs_create_file("regdump", S_IRUGO, root, musb, &musb_regdump_fops);
	debugfs_create_file("testmode", S_IRUGO | S_IWUSR, root, musb,
			    &musb_test_mode_fops);
	debugfs_create_file("softconnect", S_IRUGO | S_IWUSR, root, musb,
			    &musb_softconnect_fops);
}

void /* __init_or_exit */ musb_exit_debugfs(struct musb *musb)
{
	debugfs_remove_recursive(musb->debugfs_root);
}
Commit	Line	Data
5fd54ace	1	// SPDX-License-Identifier: GPL-2.0
7f7f9e2a FB	2	/*
	3	* MUSB OTG driver debugfs support
	4	*
	5	* Copyright 2010 Nokia Corporation
	6	* Contact: Felipe Balbi <felipe.balbi@nokia.com>
7f7f9e2a FB	7	*/
	8
	9	#include <linux/module.h>
	10	#include <linux/kernel.h>
7f7f9e2a	11	#include <linux/init.h>
7f7f9e2a FB	12	#include <linux/debugfs.h>
	13	#include <linux/seq_file.h>
	14
7c0f6ba6	15	#include <linux/uaccess.h>
7f7f9e2a FB	16
	17	#include "musb_core.h"
	18	#include "musb_debug.h"
	19
7f7f9e2a FB	20	struct musb_register_map {
	21	char *name;
	22	unsigned offset;
	23	unsigned size;
	24	};
	25
	26	static const struct musb_register_map musb_regmap[] = {
c2365ce5 RB	27	{ "FAddr", MUSB_FADDR, 8 },
	28	{ "Power", MUSB_POWER, 8 },
	29	{ "Frame", MUSB_FRAME, 16 },
	30	{ "Index", MUSB_INDEX, 8 },
	31	{ "Testmode", MUSB_TESTMODE, 8 },
	32	{ "TxMaxPp", MUSB_TXMAXP, 16 },
	33	{ "TxCSRp", MUSB_TXCSR, 16 },
	34	{ "RxMaxPp", MUSB_RXMAXP, 16 },
	35	{ "RxCSR", MUSB_RXCSR, 16 },
	36	{ "RxCount", MUSB_RXCOUNT, 16 },
c2365ce5 RB	37	{ "IntrRxE", MUSB_INTRRXE, 16 },
	38	{ "IntrTxE", MUSB_INTRTXE, 16 },
	39	{ "IntrUsbE", MUSB_INTRUSBE, 8 },
	40	{ "DevCtl", MUSB_DEVCTL, 8 },
c2365ce5	41	{ "VControl", 0x68, 32 },
6658a62e	42	{ "HWVers", MUSB_HWVERS, 16 },
c2365ce5 RB	43	{ "LinkInfo", MUSB_LINKINFO, 8 },
	44	{ "VPLen", MUSB_VPLEN, 8 },
	45	{ "HS_EOF1", MUSB_HS_EOF1, 8 },
	46	{ "FS_EOF1", MUSB_FS_EOF1, 8 },
	47	{ "LS_EOF1", MUSB_LS_EOF1, 8 },
	48	{ "SOFT_RST", 0x7F, 8 },
7f7f9e2a	49	{ "DMA_CNTLch0", 0x204, 16 },
0936fb5e AG	50	{ "DMA_ADDRch0", 0x208, 32 },
0936fb5e AG	51	{ "DMA_COUNTch0", 0x20C, 32 },
7f7f9e2a	52	{ "DMA_CNTLch1", 0x214, 16 },
0936fb5e AG	53	{ "DMA_ADDRch1", 0x218, 32 },
0936fb5e AG	54	{ "DMA_COUNTch1", 0x21C, 32 },
7f7f9e2a	55	{ "DMA_CNTLch2", 0x224, 16 },
0936fb5e AG	56	{ "DMA_ADDRch2", 0x228, 32 },
0936fb5e AG	57	{ "DMA_COUNTch2", 0x22C, 32 },
7f7f9e2a	58	{ "DMA_CNTLch3", 0x234, 16 },
0936fb5e AG	59	{ "DMA_ADDRch3", 0x238, 32 },
0936fb5e AG	60	{ "DMA_COUNTch3", 0x23C, 32 },
7f7f9e2a	61	{ "DMA_CNTLch4", 0x244, 16 },
0936fb5e AG	62	{ "DMA_ADDRch4", 0x248, 32 },
0936fb5e AG	63	{ "DMA_COUNTch4", 0x24C, 32 },
7f7f9e2a	64	{ "DMA_CNTLch5", 0x254, 16 },
0936fb5e AG	65	{ "DMA_ADDRch5", 0x258, 32 },
0936fb5e AG	66	{ "DMA_COUNTch5", 0x25C, 32 },
7f7f9e2a	67	{ "DMA_CNTLch6", 0x264, 16 },
0936fb5e AG	68	{ "DMA_ADDRch6", 0x268, 32 },
0936fb5e AG	69	{ "DMA_COUNTch6", 0x26C, 32 },
7f7f9e2a	70	{ "DMA_CNTLch7", 0x274, 16 },
0936fb5e AG	71	{ "DMA_ADDRch7", 0x278, 32 },
0936fb5e AG	72	{ "DMA_COUNTch7", 0x27C, 32 },
449a7e99 FB	73	{ "ConfigData", MUSB_CONFIGDATA,8 },
	74	{ "BabbleCtl", MUSB_BABBLE_CTL,8 },
	75	{ "TxFIFOsz", MUSB_TXFIFOSZ, 8 },
	76	{ "RxFIFOsz", MUSB_RXFIFOSZ, 8 },
	77	{ "TxFIFOadd", MUSB_TXFIFOADD, 16 },
	78	{ "RxFIFOadd", MUSB_RXFIFOADD, 16 },
	79	{ "EPInfo", MUSB_EPINFO, 8 },
	80	{ "RAMInfo", MUSB_RAMINFO, 8 },
7f7f9e2a FB	81	{ } /* Terminating Entry */
	82	};
	83
7f7f9e2a FB	84	static int musb_regdump_show(struct seq_file s, void unused)
	85	{
	86	struct musb *musb = s->private;
	87	unsigned i;
	88
	89	seq_printf(s, "MUSB (M)HDRC Register Dump\n");
7b6c1b4c	90	pm_runtime_get_sync(musb->controller);
7f7f9e2a FB	91
	92	for (i = 0; i < ARRAY_SIZE(musb_regmap); i++) {
	93	switch (musb_regmap[i].size) {
	94	case 8:
	95	seq_printf(s, "%-12s: %02x\n", musb_regmap[i].name,
	96	musb_readb(musb->mregs, musb_regmap[i].offset));
	97	break;
	98	case 16:
	99	seq_printf(s, "%-12s: %04x\n", musb_regmap[i].name,
	100	musb_readw(musb->mregs, musb_regmap[i].offset));
	101	break;
	102	case 32:
	103	seq_printf(s, "%-12s: %08x\n", musb_regmap[i].name,
	104	musb_readl(musb->mregs, musb_regmap[i].offset));
	105	break;
	106	}
	107	}
	108
7b6c1b4c BL	109	pm_runtime_mark_last_busy(musb->controller);
7b6c1b4c BL	110	pm_runtime_put_autosuspend(musb->controller);
7f7f9e2a FB	111	return 0;
7f7f9e2a FB	112	}
efb85c4d	113	DEFINE_SHOW_ATTRIBUTE(musb_regdump);
7f7f9e2a FB	114
	115	static int musb_test_mode_show(struct seq_file s, void unused)
	116	{
	117	struct musb *musb = s->private;
	118	unsigned test;
	119
7b6c1b4c	120	pm_runtime_get_sync(musb->controller);
7f7f9e2a	121	test = musb_readb(musb->mregs, MUSB_TESTMODE);
7b6c1b4c BL	122	pm_runtime_mark_last_busy(musb->controller);
7b6c1b4c BL	123	pm_runtime_put_autosuspend(musb->controller);
7f7f9e2a	124
7eebe4ec PR	125	if (test == (MUSB_TEST_FORCE_HOST \| MUSB_TEST_FORCE_FS))
	126	seq_printf(s, "force host full-speed\n");
	127
	128	else if (test == (MUSB_TEST_FORCE_HOST \| MUSB_TEST_FORCE_HS))
	129	seq_printf(s, "force host high-speed\n");
	130
	131	else if (test == MUSB_TEST_FORCE_HOST)
7f7f9e2a FB	132	seq_printf(s, "force host\n");
7f7f9e2a FB	133
7eebe4ec	134	else if (test == MUSB_TEST_FIFO_ACCESS)
7f7f9e2a FB	135	seq_printf(s, "fifo access\n");
7f7f9e2a FB	136
7eebe4ec	137	else if (test == MUSB_TEST_FORCE_FS)
7f7f9e2a FB	138	seq_printf(s, "force full-speed\n");
7f7f9e2a FB	139
7eebe4ec	140	else if (test == MUSB_TEST_FORCE_HS)
7f7f9e2a FB	141	seq_printf(s, "force high-speed\n");
7f7f9e2a FB	142
7eebe4ec	143	else if (test == MUSB_TEST_PACKET)
7f7f9e2a FB	144	seq_printf(s, "test packet\n");
7f7f9e2a FB	145
7eebe4ec	146	else if (test == MUSB_TEST_K)
7f7f9e2a FB	147	seq_printf(s, "test K\n");
7f7f9e2a FB	148
7eebe4ec	149	else if (test == MUSB_TEST_J)
7f7f9e2a FB	150	seq_printf(s, "test J\n");
7f7f9e2a FB	151
7eebe4ec	152	else if (test == MUSB_TEST_SE0_NAK)
7f7f9e2a FB	153	seq_printf(s, "test SE0 NAK\n");
	154
	155	return 0;
	156	}
	157
7f7f9e2a FB	158	static int musb_test_mode_open(struct inode inode, struct file file)
7f7f9e2a FB	159	{
7f7f9e2a FB	160	return single_open(file, musb_test_mode_show, inode->i_private);
	161	}
	162
	163	static ssize_t musb_test_mode_write(struct file *file,
	164	const char __user ubuf, size_t count, loff_t ppos)
	165	{
024cfa59 MN	166	struct seq_file *s = file->private_data;
024cfa59 MN	167	struct musb *musb = s->private;
205845ef	168	u8 test;
7eebe4ec	169	char buf[24];
7f7f9e2a	170
e4befc12 DL	171	memset(buf, 0x00, sizeof(buf));
	172
	173	if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
	174	return -EFAULT;
	175
7b6c1b4c	176	pm_runtime_get_sync(musb->controller);
205845ef BL	177	test = musb_readb(musb->mregs, MUSB_TESTMODE);
	178	if (test) {
	179	dev_err(musb->controller, "Error: test mode is already set. "
	180	"Please do USB Bus Reset to start a new test.\n");
7b6c1b4c	181	goto ret;
205845ef BL	182	}
205845ef BL	183
7eebe4ec PR	184	if (strstarts(buf, "force host full-speed"))
	185	test = MUSB_TEST_FORCE_HOST \| MUSB_TEST_FORCE_FS;
	186
	187	else if (strstarts(buf, "force host high-speed"))
	188	test = MUSB_TEST_FORCE_HOST \| MUSB_TEST_FORCE_HS;
	189
	190	else if (strstarts(buf, "force host"))
7f7f9e2a FB	191	test = MUSB_TEST_FORCE_HOST;
7f7f9e2a FB	192
7eebe4ec	193	else if (strstarts(buf, "fifo access"))
7f7f9e2a FB	194	test = MUSB_TEST_FIFO_ACCESS;
7f7f9e2a FB	195
7eebe4ec	196	else if (strstarts(buf, "force full-speed"))
7f7f9e2a FB	197	test = MUSB_TEST_FORCE_FS;
7f7f9e2a FB	198
7eebe4ec	199	else if (strstarts(buf, "force high-speed"))
7f7f9e2a FB	200	test = MUSB_TEST_FORCE_HS;
7f7f9e2a FB	201
7eebe4ec	202	else if (strstarts(buf, "test packet")) {
7f7f9e2a FB	203	test = MUSB_TEST_PACKET;
	204	musb_load_testpacket(musb);
	205	}
	206
7eebe4ec	207	else if (strstarts(buf, "test K"))
7f7f9e2a FB	208	test = MUSB_TEST_K;
7f7f9e2a FB	209
7eebe4ec	210	else if (strstarts(buf, "test J"))
7f7f9e2a FB	211	test = MUSB_TEST_J;
7f7f9e2a FB	212
7eebe4ec	213	else if (strstarts(buf, "test SE0 NAK"))
7f7f9e2a FB	214	test = MUSB_TEST_SE0_NAK;
	215
	216	musb_writeb(musb->mregs, MUSB_TESTMODE, test);
	217
7b6c1b4c BL	218	ret:
	219	pm_runtime_mark_last_busy(musb->controller);
	220	pm_runtime_put_autosuspend(musb->controller);
7f7f9e2a FB	221	return count;
	222	}
	223
	224	static const struct file_operations musb_test_mode_fops = {
	225	.open = musb_test_mode_open,
	226	.write = musb_test_mode_write,
	227	.read = seq_read,
	228	.llseek = seq_lseek,
	229	.release = single_release,
	230	};
	231
ffc1d299 BL	232	static int musb_softconnect_show(struct seq_file s, void unused)
	233	{
	234	struct musb *musb = s->private;
	235	u8 reg;
	236	int connect;
	237
21acc656	238	switch (musb_get_state(musb)) {
ffc1d299 BL	239	case OTG_STATE_A_HOST:
ffc1d299 BL	240	case OTG_STATE_A_WAIT_BCON:
7b6c1b4c BL	241	pm_runtime_get_sync(musb->controller);
7b6c1b4c BL	242
ffc1d299 BL	243	reg = musb_readb(musb->mregs, MUSB_DEVCTL);
ffc1d299 BL	244	connect = reg & MUSB_DEVCTL_SESSION ? 1 : 0;
7b6c1b4c BL	245
	246	pm_runtime_mark_last_busy(musb->controller);
	247	pm_runtime_put_autosuspend(musb->controller);
ffc1d299 BL	248	break;
	249	default:
	250	connect = -1;
	251	}
	252
	253	seq_printf(s, "%d\n", connect);
	254
	255	return 0;
	256	}
	257
	258	static int musb_softconnect_open(struct inode inode, struct file file)
	259	{
	260	return single_open(file, musb_softconnect_show, inode->i_private);
	261	}
	262
	263	static ssize_t musb_softconnect_write(struct file *file,
	264	const char __user ubuf, size_t count, loff_t ppos)
	265	{
	266	struct seq_file *s = file->private_data;
	267	struct musb *musb = s->private;
	268	char buf[2];
	269	u8 reg;
	270
	271	memset(buf, 0x00, sizeof(buf));
	272
	273	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
	274	return -EFAULT;
	275
7b6c1b4c	276	pm_runtime_get_sync(musb->controller);
ffc1d299	277	if (!strncmp(buf, "0", 1)) {
21acc656	278	switch (musb_get_state(musb)) {
ffc1d299 BL	279	case OTG_STATE_A_HOST:
	280	musb_root_disconnect(musb);
	281	reg = musb_readb(musb->mregs, MUSB_DEVCTL);
	282	reg &= ~MUSB_DEVCTL_SESSION;
	283	musb_writeb(musb->mregs, MUSB_DEVCTL, reg);
	284	break;
	285	default:
	286	break;
	287	}
	288	} else if (!strncmp(buf, "1", 1)) {
21acc656	289	switch (musb_get_state(musb)) {
ffc1d299 BL	290	case OTG_STATE_A_WAIT_BCON:
	291	/*
	292	* musb_save_context() called in musb_runtime_suspend()
	293	* might cache devctl with SESSION bit cleared during
	294	* soft-disconnect, so specifically set SESSION bit
	295	* here to preserve it for musb_runtime_resume().
	296	*/
	297	musb->context.devctl \|= MUSB_DEVCTL_SESSION;
	298	reg = musb_readb(musb->mregs, MUSB_DEVCTL);
	299	reg \|= MUSB_DEVCTL_SESSION;
	300	musb_writeb(musb->mregs, MUSB_DEVCTL, reg);
	301	break;
	302	default:
	303	break;
	304	}
	305	}
	306
7b6c1b4c BL	307	pm_runtime_mark_last_busy(musb->controller);
7b6c1b4c BL	308	pm_runtime_put_autosuspend(musb->controller);
ffc1d299 BL	309	return count;
	310	}
	311
	312	/*
	313	* In host mode, connect/disconnect the bus without physically
	314	* remove the devices.
	315	*/
	316	static const struct file_operations musb_softconnect_fops = {
	317	.open = musb_softconnect_open,
	318	.write = musb_softconnect_write,
	319	.read = seq_read,
	320	.llseek = seq_lseek,
	321	.release = single_release,
	322	};
	323
8a1ef171	324	void musb_init_debugfs(struct musb *musb)
7f7f9e2a	325	{
8a1ef171	326	struct dentry *root;
7f7f9e2a	327
d4836b69	328	root = debugfs_create_dir(dev_name(musb->controller), usb_debug_root);
8d2421e6	329	musb->debugfs_root = root;
7f7f9e2a	330
8a1ef171 GKH	331	debugfs_create_file("regdump", S_IRUGO, root, musb, &musb_regdump_fops);
	332	debugfs_create_file("testmode", S_IRUGO \| S_IWUSR, root, musb,
	333	&musb_test_mode_fops);
	334	debugfs_create_file("softconnect", S_IRUGO \| S_IWUSR, root, musb,
	335	&musb_softconnect_fops);
7f7f9e2a FB	336	}
7f7f9e2a FB	337
b0f9da7e	338	void /* __init_or_exit / musb_exit_debugfs(struct musb musb)
7f7f9e2a	339	{
8d2421e6	340	debugfs_remove_recursive(musb->debugfs_root);
7f7f9e2a	341	}