2 * MUSB OTG driver debugfs support
4 * Copyright 2010 Nokia Corporation
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.
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.
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
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.
34 #include <linux/module.h>
35 #include <linux/kernel.h>
36 #include <linux/sched.h>
37 #include <linux/init.h>
38 #include <linux/list.h>
39 #include <linux/kobject.h>
40 #include <linux/platform_device.h>
42 #include <linux/debugfs.h>
43 #include <linux/seq_file.h>
46 #include <mach/hardware.h>
47 #include <mach/memory.h>
48 #include <asm/mach-types.h>
51 #include <asm/uaccess.h>
53 #include "musb_core.h"
54 #include "musb_debug.h"
56 #ifdef CONFIG_ARCH_DAVINCI
60 struct musb_register_map {
66 static const struct musb_register_map musb_regmap[] = {
69 { "Frame", 0x0c, 16 },
71 { "Testmode", 0x0f, 8 },
72 { "TxMaxPp", 0x10, 16 },
73 { "TxCSRp", 0x12, 16 },
74 { "RxMaxPp", 0x14, 16 },
75 { "RxCSR", 0x16, 16 },
76 { "RxCount", 0x18, 16 },
77 { "ConfigData", 0x1f, 8 },
78 { "DevCtl", 0x60, 8 },
80 { "TxFIFOsz", 0x62, 8 },
81 { "RxFIFOsz", 0x63, 8 },
82 { "TxFIFOadd", 0x64, 16 },
83 { "RxFIFOadd", 0x66, 16 },
84 { "VControl", 0x68, 32 },
85 { "HWVers", 0x6C, 16 },
86 { "EPInfo", 0x78, 8 },
87 { "RAMInfo", 0x79, 8 },
88 { "LinkInfo", 0x7A, 8 },
90 { "HS_EOF1", 0x7C, 8 },
91 { "FS_EOF1", 0x7D, 8 },
92 { "LS_EOF1", 0x7E, 8 },
93 { "SOFT_RST", 0x7F, 8 },
94 { "DMA_CNTLch0", 0x204, 16 },
95 { "DMA_ADDRch0", 0x208, 16 },
96 { "DMA_COUNTch0", 0x20C, 16 },
97 { "DMA_CNTLch1", 0x214, 16 },
98 { "DMA_ADDRch1", 0x218, 16 },
99 { "DMA_COUNTch1", 0x21C, 16 },
100 { "DMA_CNTLch2", 0x224, 16 },
101 { "DMA_ADDRch2", 0x228, 16 },
102 { "DMA_COUNTch2", 0x22C, 16 },
103 { "DMA_CNTLch3", 0x234, 16 },
104 { "DMA_ADDRch3", 0x238, 16 },
105 { "DMA_COUNTch3", 0x23C, 16 },
106 { "DMA_CNTLch4", 0x244, 16 },
107 { "DMA_ADDRch4", 0x248, 16 },
108 { "DMA_COUNTch4", 0x24C, 16 },
109 { "DMA_CNTLch5", 0x254, 16 },
110 { "DMA_ADDRch5", 0x258, 16 },
111 { "DMA_COUNTch5", 0x25C, 16 },
112 { "DMA_CNTLch6", 0x264, 16 },
113 { "DMA_ADDRch6", 0x268, 16 },
114 { "DMA_COUNTch6", 0x26C, 16 },
115 { "DMA_CNTLch7", 0x274, 16 },
116 { "DMA_ADDRch7", 0x278, 16 },
117 { "DMA_COUNTch7", 0x27C, 16 },
118 { } /* Terminating Entry */
121 static struct dentry *musb_debugfs_root;
123 static int musb_regdump_show(struct seq_file *s, void *unused)
125 struct musb *musb = s->private;
128 seq_printf(s, "MUSB (M)HDRC Register Dump\n");
130 for (i = 0; i < ARRAY_SIZE(musb_regmap); i++) {
131 switch (musb_regmap[i].size) {
133 seq_printf(s, "%-12s: %02x\n", musb_regmap[i].name,
134 musb_readb(musb->mregs, musb_regmap[i].offset));
137 seq_printf(s, "%-12s: %04x\n", musb_regmap[i].name,
138 musb_readw(musb->mregs, musb_regmap[i].offset));
141 seq_printf(s, "%-12s: %08x\n", musb_regmap[i].name,
142 musb_readl(musb->mregs, musb_regmap[i].offset));
150 static int musb_regdump_open(struct inode *inode, struct file *file)
152 return single_open(file, musb_regdump_show, inode->i_private);
155 static int musb_test_mode_show(struct seq_file *s, void *unused)
157 struct musb *musb = s->private;
160 test = musb_readb(musb->mregs, MUSB_TESTMODE);
162 if (test & MUSB_TEST_FORCE_HOST)
163 seq_printf(s, "force host\n");
165 if (test & MUSB_TEST_FIFO_ACCESS)
166 seq_printf(s, "fifo access\n");
168 if (test & MUSB_TEST_FORCE_FS)
169 seq_printf(s, "force full-speed\n");
171 if (test & MUSB_TEST_FORCE_HS)
172 seq_printf(s, "force high-speed\n");
174 if (test & MUSB_TEST_PACKET)
175 seq_printf(s, "test packet\n");
177 if (test & MUSB_TEST_K)
178 seq_printf(s, "test K\n");
180 if (test & MUSB_TEST_J)
181 seq_printf(s, "test J\n");
183 if (test & MUSB_TEST_SE0_NAK)
184 seq_printf(s, "test SE0 NAK\n");
189 static const struct file_operations musb_regdump_fops = {
190 .open = musb_regdump_open,
193 .release = single_release,
196 static int musb_test_mode_open(struct inode *inode, struct file *file)
198 file->private_data = inode->i_private;
200 return single_open(file, musb_test_mode_show, inode->i_private);
203 static ssize_t musb_test_mode_write(struct file *file,
204 const char __user *ubuf, size_t count, loff_t *ppos)
206 struct musb *musb = file->private_data;
210 memset(buf, 0x00, sizeof(buf));
212 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
215 if (!strncmp(buf, "force host", 9))
216 test = MUSB_TEST_FORCE_HOST;
218 if (!strncmp(buf, "fifo access", 11))
219 test = MUSB_TEST_FIFO_ACCESS;
221 if (!strncmp(buf, "force full-speed", 15))
222 test = MUSB_TEST_FORCE_FS;
224 if (!strncmp(buf, "force high-speed", 15))
225 test = MUSB_TEST_FORCE_HS;
227 if (!strncmp(buf, "test packet", 10)) {
228 test = MUSB_TEST_PACKET;
229 musb_load_testpacket(musb);
232 if (!strncmp(buf, "test K", 6))
235 if (!strncmp(buf, "test J", 6))
238 if (!strncmp(buf, "test SE0 NAK", 12))
239 test = MUSB_TEST_SE0_NAK;
241 musb_writeb(musb->mregs, MUSB_TESTMODE, test);
246 static const struct file_operations musb_test_mode_fops = {
247 .open = musb_test_mode_open,
248 .write = musb_test_mode_write,
251 .release = single_release,
254 int __init musb_init_debugfs(struct musb *musb)
260 root = debugfs_create_dir("musb", NULL);
266 file = debugfs_create_file("regdump", S_IRUGO, root, musb,
273 file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR,
274 root, musb, &musb_test_mode_fops);
280 musb_debugfs_root = root;
285 debugfs_remove_recursive(root);
291 void /* __init_or_exit */ musb_exit_debugfs(struct musb *musb)
293 debugfs_remove_recursive(musb_debugfs_root);