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/sched.h> 37 #include <linux/init.h> 38 #include <linux/list.h> 39 #include <linux/platform_device.h> 40 #include <linux/io.h> 41 #include <linux/debugfs.h> 42 #include <linux/seq_file.h> 43 44 #include <asm/uaccess.h> 45 46 #include "musb_core.h" 47 #include "musb_debug.h" 48 49 #ifdef CONFIG_ARCH_DAVINCI 50 #include "davinci.h" 51 #endif 52 53 struct musb_register_map { 54 char *name; 55 unsigned offset; 56 unsigned size; 57 }; 58 59 static const struct musb_register_map musb_regmap[] = { 60 { "FAddr", 0x00, 8 }, 61 { "Power", 0x01, 8 }, 62 { "Frame", 0x0c, 16 }, 63 { "Index", 0x0e, 8 }, 64 { "Testmode", 0x0f, 8 }, 65 { "TxMaxPp", 0x10, 16 }, 66 { "TxCSRp", 0x12, 16 }, 67 { "RxMaxPp", 0x14, 16 }, 68 { "RxCSR", 0x16, 16 }, 69 { "RxCount", 0x18, 16 }, 70 { "ConfigData", 0x1f, 8 }, 71 { "DevCtl", 0x60, 8 }, 72 { "MISC", 0x61, 8 }, 73 { "TxFIFOsz", 0x62, 8 }, 74 { "RxFIFOsz", 0x63, 8 }, 75 { "TxFIFOadd", 0x64, 16 }, 76 { "RxFIFOadd", 0x66, 16 }, 77 { "VControl", 0x68, 32 }, 78 { "HWVers", 0x6C, 16 }, 79 { "EPInfo", 0x78, 8 }, 80 { "RAMInfo", 0x79, 8 }, 81 { "LinkInfo", 0x7A, 8 }, 82 { "VPLen", 0x7B, 8 }, 83 { "HS_EOF1", 0x7C, 8 }, 84 { "FS_EOF1", 0x7D, 8 }, 85 { "LS_EOF1", 0x7E, 8 }, 86 { "SOFT_RST", 0x7F, 8 }, 87 { "DMA_CNTLch0", 0x204, 16 }, 88 { "DMA_ADDRch0", 0x208, 32 }, 89 { "DMA_COUNTch0", 0x20C, 32 }, 90 { "DMA_CNTLch1", 0x214, 16 }, 91 { "DMA_ADDRch1", 0x218, 32 }, 92 { "DMA_COUNTch1", 0x21C, 32 }, 93 { "DMA_CNTLch2", 0x224, 16 }, 94 { "DMA_ADDRch2", 0x228, 32 }, 95 { "DMA_COUNTch2", 0x22C, 32 }, 96 { "DMA_CNTLch3", 0x234, 16 }, 97 { "DMA_ADDRch3", 0x238, 32 }, 98 { "DMA_COUNTch3", 0x23C, 32 }, 99 { "DMA_CNTLch4", 0x244, 16 }, 100 { "DMA_ADDRch4", 0x248, 32 }, 101 { "DMA_COUNTch4", 0x24C, 32 }, 102 { "DMA_CNTLch5", 0x254, 16 }, 103 { "DMA_ADDRch5", 0x258, 32 }, 104 { "DMA_COUNTch5", 0x25C, 32 }, 105 { "DMA_CNTLch6", 0x264, 16 }, 106 { "DMA_ADDRch6", 0x268, 32 }, 107 { "DMA_COUNTch6", 0x26C, 32 }, 108 { "DMA_CNTLch7", 0x274, 16 }, 109 { "DMA_ADDRch7", 0x278, 32 }, 110 { "DMA_COUNTch7", 0x27C, 32 }, 111 { } /* Terminating Entry */ 112 }; 113 114 static struct dentry *musb_debugfs_root; 115 116 static int musb_regdump_show(struct seq_file *s, void *unused) 117 { 118 struct musb *musb = s->private; 119 unsigned i; 120 121 seq_printf(s, "MUSB (M)HDRC Register Dump\n"); 122 123 for (i = 0; i < ARRAY_SIZE(musb_regmap); i++) { 124 switch (musb_regmap[i].size) { 125 case 8: 126 seq_printf(s, "%-12s: %02x\n", musb_regmap[i].name, 127 musb_readb(musb->mregs, musb_regmap[i].offset)); 128 break; 129 case 16: 130 seq_printf(s, "%-12s: %04x\n", musb_regmap[i].name, 131 musb_readw(musb->mregs, musb_regmap[i].offset)); 132 break; 133 case 32: 134 seq_printf(s, "%-12s: %08x\n", musb_regmap[i].name, 135 musb_readl(musb->mregs, musb_regmap[i].offset)); 136 break; 137 } 138 } 139 140 return 0; 141 } 142 143 static int musb_regdump_open(struct inode *inode, struct file *file) 144 { 145 return single_open(file, musb_regdump_show, inode->i_private); 146 } 147 148 static int musb_test_mode_show(struct seq_file *s, void *unused) 149 { 150 struct musb *musb = s->private; 151 unsigned test; 152 153 test = musb_readb(musb->mregs, MUSB_TESTMODE); 154 155 if (test & MUSB_TEST_FORCE_HOST) 156 seq_printf(s, "force host\n"); 157 158 if (test & MUSB_TEST_FIFO_ACCESS) 159 seq_printf(s, "fifo access\n"); 160 161 if (test & MUSB_TEST_FORCE_FS) 162 seq_printf(s, "force full-speed\n"); 163 164 if (test & MUSB_TEST_FORCE_HS) 165 seq_printf(s, "force high-speed\n"); 166 167 if (test & MUSB_TEST_PACKET) 168 seq_printf(s, "test packet\n"); 169 170 if (test & MUSB_TEST_K) 171 seq_printf(s, "test K\n"); 172 173 if (test & MUSB_TEST_J) 174 seq_printf(s, "test J\n"); 175 176 if (test & MUSB_TEST_SE0_NAK) 177 seq_printf(s, "test SE0 NAK\n"); 178 179 return 0; 180 } 181 182 static const struct file_operations musb_regdump_fops = { 183 .open = musb_regdump_open, 184 .read = seq_read, 185 .llseek = seq_lseek, 186 .release = single_release, 187 }; 188 189 static int musb_test_mode_open(struct inode *inode, struct file *file) 190 { 191 return single_open(file, musb_test_mode_show, inode->i_private); 192 } 193 194 static ssize_t musb_test_mode_write(struct file *file, 195 const char __user *ubuf, size_t count, loff_t *ppos) 196 { 197 struct seq_file *s = file->private_data; 198 struct musb *musb = s->private; 199 u8 test = 0; 200 char buf[18]; 201 202 memset(buf, 0x00, sizeof(buf)); 203 204 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) 205 return -EFAULT; 206 207 if (!strncmp(buf, "force host", 9)) 208 test = MUSB_TEST_FORCE_HOST; 209 210 if (!strncmp(buf, "fifo access", 11)) 211 test = MUSB_TEST_FIFO_ACCESS; 212 213 if (!strncmp(buf, "force full-speed", 15)) 214 test = MUSB_TEST_FORCE_FS; 215 216 if (!strncmp(buf, "force high-speed", 15)) 217 test = MUSB_TEST_FORCE_HS; 218 219 if (!strncmp(buf, "test packet", 10)) { 220 test = MUSB_TEST_PACKET; 221 musb_load_testpacket(musb); 222 } 223 224 if (!strncmp(buf, "test K", 6)) 225 test = MUSB_TEST_K; 226 227 if (!strncmp(buf, "test J", 6)) 228 test = MUSB_TEST_J; 229 230 if (!strncmp(buf, "test SE0 NAK", 12)) 231 test = MUSB_TEST_SE0_NAK; 232 233 musb_writeb(musb->mregs, MUSB_TESTMODE, test); 234 235 return count; 236 } 237 238 static const struct file_operations musb_test_mode_fops = { 239 .open = musb_test_mode_open, 240 .write = musb_test_mode_write, 241 .read = seq_read, 242 .llseek = seq_lseek, 243 .release = single_release, 244 }; 245 246 int __init musb_init_debugfs(struct musb *musb) 247 { 248 struct dentry *root; 249 struct dentry *file; 250 int ret; 251 252 root = debugfs_create_dir("musb", NULL); 253 if (IS_ERR(root)) { 254 ret = PTR_ERR(root); 255 goto err0; 256 } 257 258 file = debugfs_create_file("regdump", S_IRUGO, root, musb, 259 &musb_regdump_fops); 260 if (IS_ERR(file)) { 261 ret = PTR_ERR(file); 262 goto err1; 263 } 264 265 file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, 266 root, musb, &musb_test_mode_fops); 267 if (IS_ERR(file)) { 268 ret = PTR_ERR(file); 269 goto err1; 270 } 271 272 musb_debugfs_root = root; 273 274 return 0; 275 276 err1: 277 debugfs_remove_recursive(root); 278 279 err0: 280 return ret; 281 } 282 283 void /* __init_or_exit */ musb_exit_debugfs(struct musb *musb) 284 { 285 debugfs_remove_recursive(musb_debugfs_root); 286 } 287