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 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 { 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 { 187 struct seq_file *s = file->private_data; 188 struct musb *musb = s->private; 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 }; 235 236 int musb_init_debugfs(struct musb *musb) 237 { 238 struct dentry *root; 239 struct dentry *file; 240 int ret; 241 242 root = debugfs_create_dir(dev_name(musb->controller), NULL); 243 if (!root) { 244 ret = -ENOMEM; 245 goto err0; 246 } 247 248 file = debugfs_create_file("regdump", S_IRUGO, root, musb, 249 &musb_regdump_fops); 250 if (!file) { 251 ret = -ENOMEM; 252 goto err1; 253 } 254 255 file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, 256 root, musb, &musb_test_mode_fops); 257 if (!file) { 258 ret = -ENOMEM; 259 goto err1; 260 } 261 262 musb->debugfs_root = root; 263 264 return 0; 265 266 err1: 267 debugfs_remove_recursive(root); 268 269 err0: 270 return ret; 271 } 272 273 void /* __init_or_exit */ musb_exit_debugfs(struct musb *musb) 274 { 275 debugfs_remove_recursive(musb->debugfs_root); 276 } 277