[mirror_ubuntu-focal-kernel.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",	0x69,		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 },
#ifndef CONFIG_BLACKFIN
	{ "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 },
#endif
	{  }	/* 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;
}

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

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 const struct file_operations musb_regdump_fops = {
	.open			= musb_regdump_open,
	.read			= seq_read,
	.llseek			= seq_lseek,
	.release		= single_release,
};

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];

	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;
	}

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

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

	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->xceiv->otg->state) {
	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->xceiv->otg->state) {
		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->xceiv->otg->state) {
		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,
};

int musb_init_debugfs(struct musb *musb)
{
	struct dentry		*root;
	struct dentry		*file;
	int			ret;

	root = debugfs_create_dir(dev_name(musb->controller), NULL);
	if (!root) {
		ret = -ENOMEM;
		goto err0;
	}

	file = debugfs_create_file("regdump", S_IRUGO, root, musb,
			&musb_regdump_fops);
	if (!file) {
		ret = -ENOMEM;
		goto err1;
	}

	file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR,
			root, musb, &musb_test_mode_fops);
	if (!file) {
		ret = -ENOMEM;
		goto err1;
	}

	file = debugfs_create_file("softconnect", S_IRUGO | S_IWUSR,
			root, musb, &musb_softconnect_fops);
	if (!file) {
		ret = -ENOMEM;
		goto err1;
	}

	musb->debugfs_root = root;

	return 0;

err1:
	debugfs_remove_recursive(root);

err0:
	return ret;
}

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 RB	41	{ "VControl", 0x68, 32 },
c2365ce5 RB	42	{ "HWVers", 0x69, 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	#ifndef CONFIG_BLACKFIN
	74	{ "ConfigData", MUSB_CONFIGDATA,8 },
	75	{ "BabbleCtl", MUSB_BABBLE_CTL,8 },
	76	{ "TxFIFOsz", MUSB_TXFIFOSZ, 8 },
	77	{ "RxFIFOsz", MUSB_RXFIFOSZ, 8 },
	78	{ "TxFIFOadd", MUSB_TXFIFOADD, 16 },
	79	{ "RxFIFOadd", MUSB_RXFIFOADD, 16 },
	80	{ "EPInfo", MUSB_EPINFO, 8 },
	81	{ "RAMInfo", MUSB_RAMINFO, 8 },
	82	#endif
7f7f9e2a FB	83	{ } /* Terminating Entry */
	84	};
	85
7f7f9e2a FB	86	static int musb_regdump_show(struct seq_file s, void unused)
	87	{
	88	struct musb *musb = s->private;
	89	unsigned i;
	90
	91	seq_printf(s, "MUSB (M)HDRC Register Dump\n");
7b6c1b4c	92	pm_runtime_get_sync(musb->controller);
7f7f9e2a FB	93
	94	for (i = 0; i < ARRAY_SIZE(musb_regmap); i++) {
	95	switch (musb_regmap[i].size) {
	96	case 8:
	97	seq_printf(s, "%-12s: %02x\n", musb_regmap[i].name,
	98	musb_readb(musb->mregs, musb_regmap[i].offset));
	99	break;
	100	case 16:
	101	seq_printf(s, "%-12s: %04x\n", musb_regmap[i].name,
	102	musb_readw(musb->mregs, musb_regmap[i].offset));
	103	break;
	104	case 32:
	105	seq_printf(s, "%-12s: %08x\n", musb_regmap[i].name,
	106	musb_readl(musb->mregs, musb_regmap[i].offset));
	107	break;
	108	}
	109	}
	110
7b6c1b4c BL	111	pm_runtime_mark_last_busy(musb->controller);
7b6c1b4c BL	112	pm_runtime_put_autosuspend(musb->controller);
7f7f9e2a FB	113	return 0;
	114	}
	115
	116	static int musb_regdump_open(struct inode inode, struct file file)
	117	{
	118	return single_open(file, musb_regdump_show, inode->i_private);
	119	}
	120
	121	static int musb_test_mode_show(struct seq_file s, void unused)
	122	{
	123	struct musb *musb = s->private;
	124	unsigned test;
	125
7b6c1b4c	126	pm_runtime_get_sync(musb->controller);
7f7f9e2a	127	test = musb_readb(musb->mregs, MUSB_TESTMODE);
7b6c1b4c BL	128	pm_runtime_mark_last_busy(musb->controller);
7b6c1b4c BL	129	pm_runtime_put_autosuspend(musb->controller);
7f7f9e2a	130
7eebe4ec PR	131	if (test == (MUSB_TEST_FORCE_HOST \| MUSB_TEST_FORCE_FS))
	132	seq_printf(s, "force host full-speed\n");
	133
	134	else if (test == (MUSB_TEST_FORCE_HOST \| MUSB_TEST_FORCE_HS))
	135	seq_printf(s, "force host high-speed\n");
	136
	137	else if (test == MUSB_TEST_FORCE_HOST)
7f7f9e2a FB	138	seq_printf(s, "force host\n");
7f7f9e2a FB	139
7eebe4ec	140	else if (test == MUSB_TEST_FIFO_ACCESS)
7f7f9e2a FB	141	seq_printf(s, "fifo access\n");
7f7f9e2a FB	142
7eebe4ec	143	else if (test == MUSB_TEST_FORCE_FS)
7f7f9e2a FB	144	seq_printf(s, "force full-speed\n");
7f7f9e2a FB	145
7eebe4ec	146	else if (test == MUSB_TEST_FORCE_HS)
7f7f9e2a FB	147	seq_printf(s, "force high-speed\n");
7f7f9e2a FB	148
7eebe4ec	149	else if (test == MUSB_TEST_PACKET)
7f7f9e2a FB	150	seq_printf(s, "test packet\n");
7f7f9e2a FB	151
7eebe4ec	152	else if (test == MUSB_TEST_K)
7f7f9e2a FB	153	seq_printf(s, "test K\n");
7f7f9e2a FB	154
7eebe4ec	155	else if (test == MUSB_TEST_J)
7f7f9e2a FB	156	seq_printf(s, "test J\n");
7f7f9e2a FB	157
7eebe4ec	158	else if (test == MUSB_TEST_SE0_NAK)
7f7f9e2a FB	159	seq_printf(s, "test SE0 NAK\n");
	160
	161	return 0;
	162	}
	163
	164	static const struct file_operations musb_regdump_fops = {
	165	.open = musb_regdump_open,
	166	.read = seq_read,
	167	.llseek = seq_lseek,
	168	.release = single_release,
	169	};
	170
	171	static int musb_test_mode_open(struct inode inode, struct file file)
	172	{
7f7f9e2a FB	173	return single_open(file, musb_test_mode_show, inode->i_private);
	174	}
	175
	176	static ssize_t musb_test_mode_write(struct file *file,
	177	const char __user ubuf, size_t count, loff_t ppos)
	178	{
024cfa59 MN	179	struct seq_file *s = file->private_data;
024cfa59 MN	180	struct musb *musb = s->private;
205845ef	181	u8 test;
7eebe4ec	182	char buf[24];
7f7f9e2a	183
7b6c1b4c	184	pm_runtime_get_sync(musb->controller);
205845ef BL	185	test = musb_readb(musb->mregs, MUSB_TESTMODE);
	186	if (test) {
	187	dev_err(musb->controller, "Error: test mode is already set. "
	188	"Please do USB Bus Reset to start a new test.\n");
7b6c1b4c	189	goto ret;
205845ef BL	190	}
205845ef BL	191
7f7f9e2a FB	192	memset(buf, 0x00, sizeof(buf));
7f7f9e2a FB	193
fe198e34	194	if (copy_from_user(buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
7f7f9e2a FB	195	return -EFAULT;
7f7f9e2a FB	196
7eebe4ec PR	197	if (strstarts(buf, "force host full-speed"))
	198	test = MUSB_TEST_FORCE_HOST \| MUSB_TEST_FORCE_FS;
	199
	200	else if (strstarts(buf, "force host high-speed"))
	201	test = MUSB_TEST_FORCE_HOST \| MUSB_TEST_FORCE_HS;
	202
	203	else if (strstarts(buf, "force host"))
7f7f9e2a FB	204	test = MUSB_TEST_FORCE_HOST;
7f7f9e2a FB	205
7eebe4ec	206	else if (strstarts(buf, "fifo access"))
7f7f9e2a FB	207	test = MUSB_TEST_FIFO_ACCESS;
7f7f9e2a FB	208
7eebe4ec	209	else if (strstarts(buf, "force full-speed"))
7f7f9e2a FB	210	test = MUSB_TEST_FORCE_FS;
7f7f9e2a FB	211
7eebe4ec	212	else if (strstarts(buf, "force high-speed"))
7f7f9e2a FB	213	test = MUSB_TEST_FORCE_HS;
7f7f9e2a FB	214
7eebe4ec	215	else if (strstarts(buf, "test packet")) {
7f7f9e2a FB	216	test = MUSB_TEST_PACKET;
	217	musb_load_testpacket(musb);
	218	}
	219
7eebe4ec	220	else if (strstarts(buf, "test K"))
7f7f9e2a FB	221	test = MUSB_TEST_K;
7f7f9e2a FB	222
7eebe4ec	223	else if (strstarts(buf, "test J"))
7f7f9e2a FB	224	test = MUSB_TEST_J;
7f7f9e2a FB	225
7eebe4ec	226	else if (strstarts(buf, "test SE0 NAK"))
7f7f9e2a FB	227	test = MUSB_TEST_SE0_NAK;
	228
	229	musb_writeb(musb->mregs, MUSB_TESTMODE, test);
	230
7b6c1b4c BL	231	ret:
	232	pm_runtime_mark_last_busy(musb->controller);
	233	pm_runtime_put_autosuspend(musb->controller);
7f7f9e2a FB	234	return count;
	235	}
	236
	237	static const struct file_operations musb_test_mode_fops = {
	238	.open = musb_test_mode_open,
	239	.write = musb_test_mode_write,
	240	.read = seq_read,
	241	.llseek = seq_lseek,
	242	.release = single_release,
	243	};
	244
ffc1d299 BL	245	static int musb_softconnect_show(struct seq_file s, void unused)
	246	{
	247	struct musb *musb = s->private;
	248	u8 reg;
	249	int connect;
	250
	251	switch (musb->xceiv->otg->state) {
	252	case OTG_STATE_A_HOST:
	253	case OTG_STATE_A_WAIT_BCON:
7b6c1b4c BL	254	pm_runtime_get_sync(musb->controller);
7b6c1b4c BL	255
ffc1d299 BL	256	reg = musb_readb(musb->mregs, MUSB_DEVCTL);
ffc1d299 BL	257	connect = reg & MUSB_DEVCTL_SESSION ? 1 : 0;
7b6c1b4c BL	258
	259	pm_runtime_mark_last_busy(musb->controller);
	260	pm_runtime_put_autosuspend(musb->controller);
ffc1d299 BL	261	break;
	262	default:
	263	connect = -1;
	264	}
	265
	266	seq_printf(s, "%d\n", connect);
	267
	268	return 0;
	269	}
	270
	271	static int musb_softconnect_open(struct inode inode, struct file file)
	272	{
	273	return single_open(file, musb_softconnect_show, inode->i_private);
	274	}
	275
	276	static ssize_t musb_softconnect_write(struct file *file,
	277	const char __user ubuf, size_t count, loff_t ppos)
	278	{
	279	struct seq_file *s = file->private_data;
	280	struct musb *musb = s->private;
	281	char buf[2];
	282	u8 reg;
	283
	284	memset(buf, 0x00, sizeof(buf));
	285
	286	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
	287	return -EFAULT;
	288
7b6c1b4c	289	pm_runtime_get_sync(musb->controller);
ffc1d299 BL	290	if (!strncmp(buf, "0", 1)) {
	291	switch (musb->xceiv->otg->state) {
	292	case OTG_STATE_A_HOST:
	293	musb_root_disconnect(musb);
	294	reg = musb_readb(musb->mregs, MUSB_DEVCTL);
	295	reg &= ~MUSB_DEVCTL_SESSION;
	296	musb_writeb(musb->mregs, MUSB_DEVCTL, reg);
	297	break;
	298	default:
	299	break;
	300	}
	301	} else if (!strncmp(buf, "1", 1)) {
	302	switch (musb->xceiv->otg->state) {
	303	case OTG_STATE_A_WAIT_BCON:
	304	/*
	305	* musb_save_context() called in musb_runtime_suspend()
	306	* might cache devctl with SESSION bit cleared during
	307	* soft-disconnect, so specifically set SESSION bit
	308	* here to preserve it for musb_runtime_resume().
	309	*/
	310	musb->context.devctl \|= MUSB_DEVCTL_SESSION;
	311	reg = musb_readb(musb->mregs, MUSB_DEVCTL);
	312	reg \|= MUSB_DEVCTL_SESSION;
	313	musb_writeb(musb->mregs, MUSB_DEVCTL, reg);
	314	break;
	315	default:
	316	break;
	317	}
	318	}
	319
7b6c1b4c BL	320	pm_runtime_mark_last_busy(musb->controller);
7b6c1b4c BL	321	pm_runtime_put_autosuspend(musb->controller);
ffc1d299 BL	322	return count;
	323	}
	324
	325	/*
	326	* In host mode, connect/disconnect the bus without physically
	327	* remove the devices.
	328	*/
	329	static const struct file_operations musb_softconnect_fops = {
	330	.open = musb_softconnect_open,
	331	.write = musb_softconnect_write,
	332	.read = seq_read,
	333	.llseek = seq_lseek,
	334	.release = single_release,
	335	};
	336
41ac7b3a	337	int musb_init_debugfs(struct musb *musb)
7f7f9e2a FB	338	{
	339	struct dentry *root;
	340	struct dentry *file;
	341	int ret;
	342
8d2421e6	343	root = debugfs_create_dir(dev_name(musb->controller), NULL);
6c2abcdd FB	344	if (!root) {
6c2abcdd FB	345	ret = -ENOMEM;
7f7f9e2a FB	346	goto err0;
	347	}
	348
	349	file = debugfs_create_file("regdump", S_IRUGO, root, musb,
	350	&musb_regdump_fops);
6c2abcdd FB	351	if (!file) {
6c2abcdd FB	352	ret = -ENOMEM;
7f7f9e2a FB	353	goto err1;
	354	}
	355
	356	file = debugfs_create_file("testmode", S_IRUGO \| S_IWUSR,
	357	root, musb, &musb_test_mode_fops);
6c2abcdd FB	358	if (!file) {
6c2abcdd FB	359	ret = -ENOMEM;
7f7f9e2a FB	360	goto err1;
	361	}
	362
ffc1d299 BL	363	file = debugfs_create_file("softconnect", S_IRUGO \| S_IWUSR,
	364	root, musb, &musb_softconnect_fops);
	365	if (!file) {
	366	ret = -ENOMEM;
	367	goto err1;
	368	}
	369
8d2421e6	370	musb->debugfs_root = root;
7f7f9e2a FB	371
	372	return 0;
	373
	374	err1:
	375	debugfs_remove_recursive(root);
	376
	377	err0:
	378	return ret;
	379	}
	380
b0f9da7e	381	void /* __init_or_exit / musb_exit_debugfs(struct musb musb)
7f7f9e2a	382	{
8d2421e6	383	debugfs_remove_recursive(musb->debugfs_root);
7f7f9e2a	384	}