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 #ifdef CONFIG_ARM 45 #include <mach/hardware.h> 46 #include <mach/memory.h> 47 #include <asm/mach-types.h> 48 #endif 49 50 #include <asm/uaccess.h> 51 52 #include "musb_core.h" 53 #include "musb_debug.h" 54 55 #ifdef CONFIG_ARCH_DAVINCI 56 #include "davinci.h" 57 #endif 58 59 struct musb_register_map { 60 char *name; 61 unsigned offset; 62 unsigned size; 63 }; 64 65 static const struct musb_register_map musb_regmap[] = { 66 { "FAddr", 0x00, 8 }, 67 { "Power", 0x01, 8 }, 68 { "Frame", 0x0c, 16 }, 69 { "Index", 0x0e, 8 }, 70 { "Testmode", 0x0f, 8 }, 71 { "TxMaxPp", 0x10, 16 }, 72 { "TxCSRp", 0x12, 16 }, 73 { "RxMaxPp", 0x14, 16 }, 74 { "RxCSR", 0x16, 16 }, 75 { "RxCount", 0x18, 16 }, 76 { "ConfigData", 0x1f, 8 }, 77 { "DevCtl", 0x60, 8 }, 78 { "MISC", 0x61, 8 }, 79 { "TxFIFOsz", 0x62, 8 }, 80 { "RxFIFOsz", 0x63, 8 }, 81 { "TxFIFOadd", 0x64, 16 }, 82 { "RxFIFOadd", 0x66, 16 }, 83 { "VControl", 0x68, 32 }, 84 { "HWVers", 0x6C, 16 }, 85 { "EPInfo", 0x78, 8 }, 86 { "RAMInfo", 0x79, 8 }, 87 { "LinkInfo", 0x7A, 8 }, 88 { "VPLen", 0x7B, 8 }, 89 { "HS_EOF1", 0x7C, 8 }, 90 { "FS_EOF1", 0x7D, 8 }, 91 { "LS_EOF1", 0x7E, 8 }, 92 { "SOFT_RST", 0x7F, 8 }, 93 { "DMA_CNTLch0", 0x204, 16 }, 94 { "DMA_ADDRch0", 0x208, 32 }, 95 { "DMA_COUNTch0", 0x20C, 32 }, 96 { "DMA_CNTLch1", 0x214, 16 }, 97 { "DMA_ADDRch1", 0x218, 32 }, 98 { "DMA_COUNTch1", 0x21C, 32 }, 99 { "DMA_CNTLch2", 0x224, 16 }, 100 { "DMA_ADDRch2", 0x228, 32 }, 101 { "DMA_COUNTch2", 0x22C, 32 }, 102 { "DMA_CNTLch3", 0x234, 16 }, 103 { "DMA_ADDRch3", 0x238, 32 }, 104 { "DMA_COUNTch3", 0x23C, 32 }, 105 { "DMA_CNTLch4", 0x244, 16 }, 106 { "DMA_ADDRch4", 0x248, 32 }, 107 { "DMA_COUNTch4", 0x24C, 32 }, 108 { "DMA_CNTLch5", 0x254, 16 }, 109 { "DMA_ADDRch5", 0x258, 32 }, 110 { "DMA_COUNTch5", 0x25C, 32 }, 111 { "DMA_CNTLch6", 0x264, 16 }, 112 { "DMA_ADDRch6", 0x268, 32 }, 113 { "DMA_COUNTch6", 0x26C, 32 }, 114 { "DMA_CNTLch7", 0x274, 16 }, 115 { "DMA_ADDRch7", 0x278, 32 }, 116 { "DMA_COUNTch7", 0x27C, 32 }, 117 { } /* Terminating Entry */ 118 }; 119 120 static struct dentry *musb_debugfs_root; 121 122 static int musb_regdump_show(struct seq_file *s, void *unused) 123 { 124 struct musb *musb = s->private; 125 unsigned i; 126 127 seq_printf(s, "MUSB (M)HDRC Register Dump\n"); 128 129 for (i = 0; i < ARRAY_SIZE(musb_regmap); i++) { 130 switch (musb_regmap[i].size) { 131 case 8: 132 seq_printf(s, "%-12s: %02x\n", musb_regmap[i].name, 133 musb_readb(musb->mregs, musb_regmap[i].offset)); 134 break; 135 case 16: 136 seq_printf(s, "%-12s: %04x\n", musb_regmap[i].name, 137 musb_readw(musb->mregs, musb_regmap[i].offset)); 138 break; 139 case 32: 140 seq_printf(s, "%-12s: %08x\n", musb_regmap[i].name, 141 musb_readl(musb->mregs, musb_regmap[i].offset)); 142 break; 143 } 144 } 145 146 return 0; 147 } 148 149 static int musb_regdump_open(struct inode *inode, struct file *file) 150 { 151 return single_open(file, musb_regdump_show, inode->i_private); 152 } 153 154 static int musb_test_mode_show(struct seq_file *s, void *unused) 155 { 156 struct musb *musb = s->private; 157 unsigned test; 158 159 test = musb_readb(musb->mregs, MUSB_TESTMODE); 160 161 if (test & MUSB_TEST_FORCE_HOST) 162 seq_printf(s, "force host\n"); 163 164 if (test & MUSB_TEST_FIFO_ACCESS) 165 seq_printf(s, "fifo access\n"); 166 167 if (test & MUSB_TEST_FORCE_FS) 168 seq_printf(s, "force full-speed\n"); 169 170 if (test & MUSB_TEST_FORCE_HS) 171 seq_printf(s, "force high-speed\n"); 172 173 if (test & MUSB_TEST_PACKET) 174 seq_printf(s, "test packet\n"); 175 176 if (test & MUSB_TEST_K) 177 seq_printf(s, "test K\n"); 178 179 if (test & MUSB_TEST_J) 180 seq_printf(s, "test J\n"); 181 182 if (test & MUSB_TEST_SE0_NAK) 183 seq_printf(s, "test SE0 NAK\n"); 184 185 return 0; 186 } 187 188 static const struct file_operations musb_regdump_fops = { 189 .open = musb_regdump_open, 190 .read = seq_read, 191 .llseek = seq_lseek, 192 .release = single_release, 193 }; 194 195 static int musb_test_mode_open(struct inode *inode, struct file *file) 196 { 197 return single_open(file, musb_test_mode_show, inode->i_private); 198 } 199 200 static ssize_t musb_test_mode_write(struct file *file, 201 const char __user *ubuf, size_t count, loff_t *ppos) 202 { 203 struct seq_file *s = file->private_data; 204 struct musb *musb = s->private; 205 u8 test = 0; 206 char buf[18]; 207 208 memset(buf, 0x00, sizeof(buf)); 209 210 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) 211 return -EFAULT; 212 213 if (!strncmp(buf, "force host", 9)) 214 test = MUSB_TEST_FORCE_HOST; 215 216 if (!strncmp(buf, "fifo access", 11)) 217 test = MUSB_TEST_FIFO_ACCESS; 218 219 if (!strncmp(buf, "force full-speed", 15)) 220 test = MUSB_TEST_FORCE_FS; 221 222 if (!strncmp(buf, "force high-speed", 15)) 223 test = MUSB_TEST_FORCE_HS; 224 225 if (!strncmp(buf, "test packet", 10)) { 226 test = MUSB_TEST_PACKET; 227 musb_load_testpacket(musb); 228 } 229 230 if (!strncmp(buf, "test K", 6)) 231 test = MUSB_TEST_K; 232 233 if (!strncmp(buf, "test J", 6)) 234 test = MUSB_TEST_J; 235 236 if (!strncmp(buf, "test SE0 NAK", 12)) 237 test = MUSB_TEST_SE0_NAK; 238 239 musb_writeb(musb->mregs, MUSB_TESTMODE, test); 240 241 return count; 242 } 243 244 static const struct file_operations musb_test_mode_fops = { 245 .open = musb_test_mode_open, 246 .write = musb_test_mode_write, 247 .read = seq_read, 248 .llseek = seq_lseek, 249 .release = single_release, 250 }; 251 252 int __init musb_init_debugfs(struct musb *musb) 253 { 254 struct dentry *root; 255 struct dentry *file; 256 int ret; 257 258 root = debugfs_create_dir("musb", NULL); 259 if (IS_ERR(root)) { 260 ret = PTR_ERR(root); 261 goto err0; 262 } 263 264 file = debugfs_create_file("regdump", S_IRUGO, root, musb, 265 &musb_regdump_fops); 266 if (IS_ERR(file)) { 267 ret = PTR_ERR(file); 268 goto err1; 269 } 270 271 file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, 272 root, musb, &musb_test_mode_fops); 273 if (IS_ERR(file)) { 274 ret = PTR_ERR(file); 275 goto err1; 276 } 277 278 musb_debugfs_root = root; 279 280 return 0; 281 282 err1: 283 debugfs_remove_recursive(root); 284 285 err0: 286 return ret; 287 } 288 289 void /* __init_or_exit */ musb_exit_debugfs(struct musb *musb) 290 { 291 debugfs_remove_recursive(musb_debugfs_root); 292 } 293