[deliverable/linux.git] / drivers / usb / musb / musb_debugfs.c

/*
 * MUSB OTG driver debugfs support
 *
 * Copyright 2010 Nokia Corporation
 * Contact: Felipe Balbi <felipe.balbi@nokia.com>
 *
 * 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/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>

#include <asm/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",		0x00,	8 },
	{ "Power",		0x01,	8 },
	{ "Frame",		0x0c,	16 },
	{ "Index",		0x0e,	8 },
	{ "Testmode",		0x0f,	8 },
	{ "TxMaxPp",		0x10,	16 },
	{ "TxCSRp",		0x12,	16 },
	{ "RxMaxPp",		0x14,	16 },
	{ "RxCSR",		0x16,	16 },
	{ "RxCount",		0x18,	16 },
	{ "ConfigData",		0x1f,	8 },
	{ "DevCtl",		0x60,	8 },
	{ "MISC",		0x61,	8 },
	{ "TxFIFOsz",		0x62,	8 },
	{ "RxFIFOsz",		0x63,	8 },
	{ "TxFIFOadd",		0x64,	16 },
	{ "RxFIFOadd",		0x66,	16 },
	{ "VControl",		0x68,	32 },
	{ "HWVers",		0x6C,	16 },
	{ "EPInfo",		0x78,	8 },
	{ "RAMInfo",		0x79,	8 },
	{ "LinkInfo",		0x7A,	8 },
	{ "VPLen",		0x7B,	8 },
	{ "HS_EOF1",		0x7C,	8 },
	{ "FS_EOF1",		0x7D,	8 },
	{ "LS_EOF1",		0x7E,	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 },
	{  }	/* 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");

	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;
		}
	}

	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;

	test = musb_readb(musb->mregs, MUSB_TESTMODE);

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

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

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

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

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

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

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

	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 = 0;
	char			buf[18];

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

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

	if (!strncmp(buf, "force host", 9))
		test = MUSB_TEST_FORCE_HOST;

	if (!strncmp(buf, "fifo access", 11))
		test = MUSB_TEST_FIFO_ACCESS;

	if (!strncmp(buf, "force full-speed", 15))
		test = MUSB_TEST_FORCE_FS;

	if (!strncmp(buf, "force high-speed", 15))
		test = MUSB_TEST_FORCE_HS;

	if (!strncmp(buf, "test packet", 10)) {
		test = MUSB_TEST_PACKET;
		musb_load_testpacket(musb);
	}

	if (!strncmp(buf, "test K", 6))
		test = MUSB_TEST_K;

	if (!strncmp(buf, "test J", 6))
		test = MUSB_TEST_J;

	if (!strncmp(buf, "test SE0 NAK", 12))
		test = MUSB_TEST_SE0_NAK;

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

	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,
};

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;
	}

	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
7f7f9e2a FB	1	/*
	2	* MUSB OTG driver debugfs support
	3	*
	4	* Copyright 2010 Nokia Corporation
	5	* Contact: Felipe Balbi <felipe.balbi@nokia.com>
	6	*
	7	* This program is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU General Public License
	9	* version 2 as published by the Free Software Foundation.
	10	*
	11	* This program is distributed in the hope that it will be useful, but
	12	* WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	* General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
	19	* 02110-1301 USA
	20	*
	21	* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
	22	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
	23	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
	24	* NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
	25	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	26	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
	27	* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
	28	* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	29	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	30	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	31	*
	32	*/
	33
	34	#include <linux/module.h>
	35	#include <linux/kernel.h>
7f7f9e2a	36	#include <linux/init.h>
7f7f9e2a FB	37	#include <linux/debugfs.h>
	38	#include <linux/seq_file.h>
	39
7f7f9e2a FB	40	#include <asm/uaccess.h>
	41
	42	#include "musb_core.h"
	43	#include "musb_debug.h"
	44
7f7f9e2a FB	45	struct musb_register_map {
	46	char *name;
	47	unsigned offset;
	48	unsigned size;
	49	};
	50
	51	static const struct musb_register_map musb_regmap[] = {
	52	{ "FAddr", 0x00, 8 },
	53	{ "Power", 0x01, 8 },
	54	{ "Frame", 0x0c, 16 },
	55	{ "Index", 0x0e, 8 },
	56	{ "Testmode", 0x0f, 8 },
	57	{ "TxMaxPp", 0x10, 16 },
	58	{ "TxCSRp", 0x12, 16 },
	59	{ "RxMaxPp", 0x14, 16 },
	60	{ "RxCSR", 0x16, 16 },
	61	{ "RxCount", 0x18, 16 },
	62	{ "ConfigData", 0x1f, 8 },
	63	{ "DevCtl", 0x60, 8 },
	64	{ "MISC", 0x61, 8 },
	65	{ "TxFIFOsz", 0x62, 8 },
	66	{ "RxFIFOsz", 0x63, 8 },
	67	{ "TxFIFOadd", 0x64, 16 },
	68	{ "RxFIFOadd", 0x66, 16 },
	69	{ "VControl", 0x68, 32 },
	70	{ "HWVers", 0x6C, 16 },
	71	{ "EPInfo", 0x78, 8 },
	72	{ "RAMInfo", 0x79, 8 },
	73	{ "LinkInfo", 0x7A, 8 },
	74	{ "VPLen", 0x7B, 8 },
	75	{ "HS_EOF1", 0x7C, 8 },
	76	{ "FS_EOF1", 0x7D, 8 },
	77	{ "LS_EOF1", 0x7E, 8 },
	78	{ "SOFT_RST", 0x7F, 8 },
	79	{ "DMA_CNTLch0", 0x204, 16 },
0936fb5e AG	80	{ "DMA_ADDRch0", 0x208, 32 },
0936fb5e AG	81	{ "DMA_COUNTch0", 0x20C, 32 },
7f7f9e2a	82	{ "DMA_CNTLch1", 0x214, 16 },
0936fb5e AG	83	{ "DMA_ADDRch1", 0x218, 32 },
0936fb5e AG	84	{ "DMA_COUNTch1", 0x21C, 32 },
7f7f9e2a	85	{ "DMA_CNTLch2", 0x224, 16 },
0936fb5e AG	86	{ "DMA_ADDRch2", 0x228, 32 },
0936fb5e AG	87	{ "DMA_COUNTch2", 0x22C, 32 },
7f7f9e2a	88	{ "DMA_CNTLch3", 0x234, 16 },
0936fb5e AG	89	{ "DMA_ADDRch3", 0x238, 32 },
0936fb5e AG	90	{ "DMA_COUNTch3", 0x23C, 32 },
7f7f9e2a	91	{ "DMA_CNTLch4", 0x244, 16 },
0936fb5e AG	92	{ "DMA_ADDRch4", 0x248, 32 },
0936fb5e AG	93	{ "DMA_COUNTch4", 0x24C, 32 },
7f7f9e2a	94	{ "DMA_CNTLch5", 0x254, 16 },
0936fb5e AG	95	{ "DMA_ADDRch5", 0x258, 32 },
0936fb5e AG	96	{ "DMA_COUNTch5", 0x25C, 32 },
7f7f9e2a	97	{ "DMA_CNTLch6", 0x264, 16 },
0936fb5e AG	98	{ "DMA_ADDRch6", 0x268, 32 },
0936fb5e AG	99	{ "DMA_COUNTch6", 0x26C, 32 },
7f7f9e2a	100	{ "DMA_CNTLch7", 0x274, 16 },
0936fb5e AG	101	{ "DMA_ADDRch7", 0x278, 32 },
0936fb5e AG	102	{ "DMA_COUNTch7", 0x27C, 32 },
7f7f9e2a FB	103	{ } /* Terminating Entry */
	104	};
	105
7f7f9e2a FB	106	static int musb_regdump_show(struct seq_file s, void unused)
	107	{
	108	struct musb *musb = s->private;
	109	unsigned i;
	110
	111	seq_printf(s, "MUSB (M)HDRC Register Dump\n");
	112
	113	for (i = 0; i < ARRAY_SIZE(musb_regmap); i++) {
	114	switch (musb_regmap[i].size) {
	115	case 8:
	116	seq_printf(s, "%-12s: %02x\n", musb_regmap[i].name,
	117	musb_readb(musb->mregs, musb_regmap[i].offset));
	118	break;
	119	case 16:
	120	seq_printf(s, "%-12s: %04x\n", musb_regmap[i].name,
	121	musb_readw(musb->mregs, musb_regmap[i].offset));
	122	break;
	123	case 32:
	124	seq_printf(s, "%-12s: %08x\n", musb_regmap[i].name,
	125	musb_readl(musb->mregs, musb_regmap[i].offset));
	126	break;
	127	}
	128	}
	129
	130	return 0;
	131	}
	132
	133	static int musb_regdump_open(struct inode inode, struct file file)
	134	{
	135	return single_open(file, musb_regdump_show, inode->i_private);
	136	}
	137
	138	static int musb_test_mode_show(struct seq_file s, void unused)
	139	{
	140	struct musb *musb = s->private;
	141	unsigned test;
	142
	143	test = musb_readb(musb->mregs, MUSB_TESTMODE);
	144
	145	if (test & MUSB_TEST_FORCE_HOST)
	146	seq_printf(s, "force host\n");
	147
	148	if (test & MUSB_TEST_FIFO_ACCESS)
	149	seq_printf(s, "fifo access\n");
	150
	151	if (test & MUSB_TEST_FORCE_FS)
	152	seq_printf(s, "force full-speed\n");
	153
	154	if (test & MUSB_TEST_FORCE_HS)
	155	seq_printf(s, "force high-speed\n");
	156
	157	if (test & MUSB_TEST_PACKET)
	158	seq_printf(s, "test packet\n");
	159
	160	if (test & MUSB_TEST_K)
	161	seq_printf(s, "test K\n");
	162
	163	if (test & MUSB_TEST_J)
	164	seq_printf(s, "test J\n");
	165
	166	if (test & MUSB_TEST_SE0_NAK)
	167	seq_printf(s, "test SE0 NAK\n");
	168
	169	return 0;
170	}
171
172	static const struct file_operations musb_regdump_fops = {
173	.open = musb_regdump_open,
174	.read = seq_read,
175	.llseek = seq_lseek,
176	.release = single_release,
177	};
178
179	static int musb_test_mode_open(struct inode inode, struct file file)
180	{
7f7f9e2a FB	181	return single_open(file, musb_test_mode_show, inode->i_private);
	182	}
	183
	184	static ssize_t musb_test_mode_write(struct file *file,
	185	const char __user ubuf, size_t count, loff_t ppos)
	186	{
024cfa59 MN	187	struct seq_file *s = file->private_data;
024cfa59 MN	188	struct musb *musb = s->private;
7f7f9e2a FB	189	u8 test = 0;
	190	char buf[18];
	191
	192	memset(buf, 0x00, sizeof(buf));
	193
	194	if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
	195	return -EFAULT;
	196
	197	if (!strncmp(buf, "force host", 9))
	198	test = MUSB_TEST_FORCE_HOST;
	199
	200	if (!strncmp(buf, "fifo access", 11))
	201	test = MUSB_TEST_FIFO_ACCESS;
	202
	203	if (!strncmp(buf, "force full-speed", 15))
	204	test = MUSB_TEST_FORCE_FS;
	205
	206	if (!strncmp(buf, "force high-speed", 15))
	207	test = MUSB_TEST_FORCE_HS;
	208
	209	if (!strncmp(buf, "test packet", 10)) {
	210	test = MUSB_TEST_PACKET;
	211	musb_load_testpacket(musb);
	212	}
	213
	214	if (!strncmp(buf, "test K", 6))
	215	test = MUSB_TEST_K;
	216
	217	if (!strncmp(buf, "test J", 6))
	218	test = MUSB_TEST_J;
	219
	220	if (!strncmp(buf, "test SE0 NAK", 12))
	221	test = MUSB_TEST_SE0_NAK;
	222
	223	musb_writeb(musb->mregs, MUSB_TESTMODE, test);
	224
	225	return count;
	226	}
	227
	228	static const struct file_operations musb_test_mode_fops = {
	229	.open = musb_test_mode_open,
	230	.write = musb_test_mode_write,
	231	.read = seq_read,
	232	.llseek = seq_lseek,
	233	.release = single_release,
	234	};
	235
41ac7b3a	236	int musb_init_debugfs(struct musb *musb)
7f7f9e2a FB	237	{
	238	struct dentry *root;
	239	struct dentry *file;
	240	int ret;
	241
8d2421e6	242	root = debugfs_create_dir(dev_name(musb->controller), NULL);
6c2abcdd FB	243	if (!root) {
6c2abcdd FB	244	ret = -ENOMEM;
7f7f9e2a FB	245	goto err0;
	246	}
	247
	248	file = debugfs_create_file("regdump", S_IRUGO, root, musb,
	249	&musb_regdump_fops);
6c2abcdd FB	250	if (!file) {
6c2abcdd FB	251	ret = -ENOMEM;
7f7f9e2a FB	252	goto err1;
	253	}
	254
	255	file = debugfs_create_file("testmode", S_IRUGO \| S_IWUSR,
	256	root, musb, &musb_test_mode_fops);
6c2abcdd FB	257	if (!file) {
6c2abcdd FB	258	ret = -ENOMEM;
7f7f9e2a FB	259	goto err1;
	260	}
	261
8d2421e6	262	musb->debugfs_root = root;
7f7f9e2a FB	263
	264	return 0;
	265
	266	err1:
	267	debugfs_remove_recursive(root);
	268
	269	err0:
	270	return ret;
	271	}
	272
b0f9da7e	273	void /* __init_or_exit / musb_exit_debugfs(struct musb musb)
7f7f9e2a	274	{
8d2421e6	275	debugfs_remove_recursive(musb->debugfs_root);
7f7f9e2a	276	}