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> 36 #include <linux/init.h> 37 #include <linux/debugfs.h> 38 #include <linux/seq_file.h> 39 40 #include <asm/uaccess.h> 41 42 #include "musb_core.h" 43 #include "musb_debug.h" 44 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 }, 80 { "DMA_ADDRch0", 0x208, 32 }, 81 { "DMA_COUNTch0", 0x20C, 32 }, 82 { "DMA_CNTLch1", 0x214, 16 }, 83 { "DMA_ADDRch1", 0x218, 32 }, 84 { "DMA_COUNTch1", 0x21C, 32 }, 85 { "DMA_CNTLch2", 0x224, 16 }, 86 { "DMA_ADDRch2", 0x228, 32 }, 87 { "DMA_COUNTch2", 0x22C, 32 }, 88 { "DMA_CNTLch3", 0x234, 16 }, 89 { "DMA_ADDRch3", 0x238, 32 }, 90 { "DMA_COUNTch3", 0x23C, 32 }, 91 { "DMA_CNTLch4", 0x244, 16 }, 92 { "DMA_ADDRch4", 0x248, 32 }, 93 { "DMA_COUNTch4", 0x24C, 32 }, 94 { "DMA_CNTLch5", 0x254, 16 }, 95 { "DMA_ADDRch5", 0x258, 32 }, 96 { "DMA_COUNTch5", 0x25C, 32 }, 97 { "DMA_CNTLch6", 0x264, 16 }, 98 { "DMA_ADDRch6", 0x268, 32 }, 99 { "DMA_COUNTch6", 0x26C, 32 }, 100 { "DMA_CNTLch7", 0x274, 16 }, 101 { "DMA_ADDRch7", 0x278, 32 }, 102 { "DMA_COUNTch7", 0x27C, 32 }, 103 { } /* Terminating Entry */ 104 }; 105 106 static struct dentry *musb_debugfs_root; 107 108 static int musb_regdump_show(struct seq_file *s, void *unused) 109 { 110 struct musb *musb = s->private; 111 unsigned i; 112 113 seq_printf(s, "MUSB (M)HDRC Register Dump\n"); 114 115 for (i = 0; i < ARRAY_SIZE(musb_regmap); i++) { 116 switch (musb_regmap[i].size) { 117 case 8: 118 seq_printf(s, "%-12s: %02x\n", musb_regmap[i].name, 119 musb_readb(musb->mregs, musb_regmap[i].offset)); 120 break; 121 case 16: 122 seq_printf(s, "%-12s: %04x\n", musb_regmap[i].name, 123 musb_readw(musb->mregs, musb_regmap[i].offset)); 124 break; 125 case 32: 126 seq_printf(s, "%-12s: %08x\n", musb_regmap[i].name, 127 musb_readl(musb->mregs, musb_regmap[i].offset)); 128 break; 129 } 130 } 131 132 return 0; 133 } 134 135 static int musb_regdump_open(struct inode *inode, struct file *file) 136 { 137 return single_open(file, musb_regdump_show, inode->i_private); 138 } 139 140 static int musb_test_mode_show(struct seq_file *s, void *unused) 141 { 142 struct musb *musb = s->private; 143 unsigned test; 144 145 test = musb_readb(musb->mregs, MUSB_TESTMODE); 146 147 if (test & MUSB_TEST_FORCE_HOST) 148 seq_printf(s, "force host\n"); 149 150 if (test & MUSB_TEST_FIFO_ACCESS) 151 seq_printf(s, "fifo access\n"); 152 153 if (test & MUSB_TEST_FORCE_FS) 154 seq_printf(s, "force full-speed\n"); 155 156 if (test & MUSB_TEST_FORCE_HS) 157 seq_printf(s, "force high-speed\n"); 158 159 if (test & MUSB_TEST_PACKET) 160 seq_printf(s, "test packet\n"); 161 162 if (test & MUSB_TEST_K) 163 seq_printf(s, "test K\n"); 164 165 if (test & MUSB_TEST_J) 166 seq_printf(s, "test J\n"); 167 168 if (test & MUSB_TEST_SE0_NAK) 169 seq_printf(s, "test SE0 NAK\n"); 170 171 return 0; 172 } 173 174 static const struct file_operations musb_regdump_fops = { 175 .open = musb_regdump_open, 176 .read = seq_read, 177 .llseek = seq_lseek, 178 .release = single_release, 179 }; 180 181 static int musb_test_mode_open(struct inode *inode, struct file *file) 182 { 183 return single_open(file, musb_test_mode_show, inode->i_private); 184 } 185 186 static ssize_t musb_test_mode_write(struct file *file, 187 const char __user *ubuf, size_t count, loff_t *ppos) 188 { 189 struct seq_file *s = file->private_data; 190 struct musb *musb = s->private; 191 u8 test = 0; 192 char buf[18]; 193 194 memset(buf, 0x00, sizeof(buf)); 195 196 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) 197 return -EFAULT; 198 199 if (!strncmp(buf, "force host", 9)) 200 test = MUSB_TEST_FORCE_HOST; 201 202 if (!strncmp(buf, "fifo access", 11)) 203 test = MUSB_TEST_FIFO_ACCESS; 204 205 if (!strncmp(buf, "force full-speed", 15)) 206 test = MUSB_TEST_FORCE_FS; 207 208 if (!strncmp(buf, "force high-speed", 15)) 209 test = MUSB_TEST_FORCE_HS; 210 211 if (!strncmp(buf, "test packet", 10)) { 212 test = MUSB_TEST_PACKET; 213 musb_load_testpacket(musb); 214 } 215 216 if (!strncmp(buf, "test K", 6)) 217 test = MUSB_TEST_K; 218 219 if (!strncmp(buf, "test J", 6)) 220 test = MUSB_TEST_J; 221 222 if (!strncmp(buf, "test SE0 NAK", 12)) 223 test = MUSB_TEST_SE0_NAK; 224 225 musb_writeb(musb->mregs, MUSB_TESTMODE, test); 226 227 return count; 228 } 229 230 static const struct file_operations musb_test_mode_fops = { 231 .open = musb_test_mode_open, 232 .write = musb_test_mode_write, 233 .read = seq_read, 234 .llseek = seq_lseek, 235 .release = single_release, 236 }; 237 238 int __devinit musb_init_debugfs(struct musb *musb) 239 { 240 struct dentry *root; 241 struct dentry *file; 242 int ret; 243 244 root = debugfs_create_dir("musb", NULL); 245 if (!root) { 246 ret = -ENOMEM; 247 goto err0; 248 } 249 250 file = debugfs_create_file("regdump", S_IRUGO, root, musb, 251 &musb_regdump_fops); 252 if (!file) { 253 ret = -ENOMEM; 254 goto err1; 255 } 256 257 file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, 258 root, musb, &musb_test_mode_fops); 259 if (!file) { 260 ret = -ENOMEM; 261 goto err1; 262 } 263 264 musb_debugfs_root = root; 265 266 return 0; 267 268 err1: 269 debugfs_remove_recursive(root); 270 271 err0: 272 return ret; 273 } 274 275 void /* __init_or_exit */ musb_exit_debugfs(struct musb *musb) 276 { 277 debugfs_remove_recursive(musb_debugfs_root); 278 } 279