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", MUSB_FADDR, 8 }, 53 { "Power", MUSB_POWER, 8 }, 54 { "Frame", MUSB_FRAME, 16 }, 55 { "Index", MUSB_INDEX, 8 }, 56 { "Testmode", MUSB_TESTMODE, 8 }, 57 { "TxMaxPp", MUSB_TXMAXP, 16 }, 58 { "TxCSRp", MUSB_TXCSR, 16 }, 59 { "RxMaxPp", MUSB_RXMAXP, 16 }, 60 { "RxCSR", MUSB_RXCSR, 16 }, 61 { "RxCount", MUSB_RXCOUNT, 16 }, 62 { "ConfigData", MUSB_CONFIGDATA,8 }, 63 { "IntrRxE", MUSB_INTRRXE, 16 }, 64 { "IntrTxE", MUSB_INTRTXE, 16 }, 65 { "IntrUsbE", MUSB_INTRUSBE, 8 }, 66 { "DevCtl", MUSB_DEVCTL, 8 }, 67 { "BabbleCtl", MUSB_BABBLE_CTL,8 }, 68 { "TxFIFOsz", MUSB_TXFIFOSZ, 8 }, 69 { "RxFIFOsz", MUSB_RXFIFOSZ, 8 }, 70 { "TxFIFOadd", MUSB_TXFIFOADD, 16 }, 71 { "RxFIFOadd", MUSB_RXFIFOADD, 16 }, 72 { "VControl", 0x68, 32 }, 73 { "HWVers", 0x69, 16 }, 74 { "EPInfo", MUSB_EPINFO, 8 }, 75 { "RAMInfo", MUSB_RAMINFO, 8 }, 76 { "LinkInfo", MUSB_LINKINFO, 8 }, 77 { "VPLen", MUSB_VPLEN, 8 }, 78 { "HS_EOF1", MUSB_HS_EOF1, 8 }, 79 { "FS_EOF1", MUSB_FS_EOF1, 8 }, 80 { "LS_EOF1", MUSB_LS_EOF1, 8 }, 81 { "SOFT_RST", 0x7F, 8 }, 82 { "DMA_CNTLch0", 0x204, 16 }, 83 { "DMA_ADDRch0", 0x208, 32 }, 84 { "DMA_COUNTch0", 0x20C, 32 }, 85 { "DMA_CNTLch1", 0x214, 16 }, 86 { "DMA_ADDRch1", 0x218, 32 }, 87 { "DMA_COUNTch1", 0x21C, 32 }, 88 { "DMA_CNTLch2", 0x224, 16 }, 89 { "DMA_ADDRch2", 0x228, 32 }, 90 { "DMA_COUNTch2", 0x22C, 32 }, 91 { "DMA_CNTLch3", 0x234, 16 }, 92 { "DMA_ADDRch3", 0x238, 32 }, 93 { "DMA_COUNTch3", 0x23C, 32 }, 94 { "DMA_CNTLch4", 0x244, 16 }, 95 { "DMA_ADDRch4", 0x248, 32 }, 96 { "DMA_COUNTch4", 0x24C, 32 }, 97 { "DMA_CNTLch5", 0x254, 16 }, 98 { "DMA_ADDRch5", 0x258, 32 }, 99 { "DMA_COUNTch5", 0x25C, 32 }, 100 { "DMA_CNTLch6", 0x264, 16 }, 101 { "DMA_ADDRch6", 0x268, 32 }, 102 { "DMA_COUNTch6", 0x26C, 32 }, 103 { "DMA_CNTLch7", 0x274, 16 }, 104 { "DMA_ADDRch7", 0x278, 32 }, 105 { "DMA_COUNTch7", 0x27C, 32 }, 106 { } /* Terminating Entry */ 107 }; 108 109 static int musb_regdump_show(struct seq_file *s, void *unused) 110 { 111 struct musb *musb = s->private; 112 unsigned i; 113 114 seq_printf(s, "MUSB (M)HDRC Register Dump\n"); 115 116 for (i = 0; i < ARRAY_SIZE(musb_regmap); i++) { 117 switch (musb_regmap[i].size) { 118 case 8: 119 seq_printf(s, "%-12s: %02x\n", musb_regmap[i].name, 120 musb_readb(musb->mregs, musb_regmap[i].offset)); 121 break; 122 case 16: 123 seq_printf(s, "%-12s: %04x\n", musb_regmap[i].name, 124 musb_readw(musb->mregs, musb_regmap[i].offset)); 125 break; 126 case 32: 127 seq_printf(s, "%-12s: %08x\n", musb_regmap[i].name, 128 musb_readl(musb->mregs, musb_regmap[i].offset)); 129 break; 130 } 131 } 132 133 return 0; 134 } 135 136 static int musb_regdump_open(struct inode *inode, struct file *file) 137 { 138 return single_open(file, musb_regdump_show, inode->i_private); 139 } 140 141 static int musb_test_mode_show(struct seq_file *s, void *unused) 142 { 143 struct musb *musb = s->private; 144 unsigned test; 145 146 test = musb_readb(musb->mregs, MUSB_TESTMODE); 147 148 if (test & MUSB_TEST_FORCE_HOST) 149 seq_printf(s, "force host\n"); 150 151 if (test & MUSB_TEST_FIFO_ACCESS) 152 seq_printf(s, "fifo access\n"); 153 154 if (test & MUSB_TEST_FORCE_FS) 155 seq_printf(s, "force full-speed\n"); 156 157 if (test & MUSB_TEST_FORCE_HS) 158 seq_printf(s, "force high-speed\n"); 159 160 if (test & MUSB_TEST_PACKET) 161 seq_printf(s, "test packet\n"); 162 163 if (test & MUSB_TEST_K) 164 seq_printf(s, "test K\n"); 165 166 if (test & MUSB_TEST_J) 167 seq_printf(s, "test J\n"); 168 169 if (test & MUSB_TEST_SE0_NAK) 170 seq_printf(s, "test SE0 NAK\n"); 171 172 return 0; 173 } 174 175 static const struct file_operations musb_regdump_fops = { 176 .open = musb_regdump_open, 177 .read = seq_read, 178 .llseek = seq_lseek, 179 .release = single_release, 180 }; 181 182 static int musb_test_mode_open(struct inode *inode, struct file *file) 183 { 184 return single_open(file, musb_test_mode_show, inode->i_private); 185 } 186 187 static ssize_t musb_test_mode_write(struct file *file, 188 const char __user *ubuf, size_t count, loff_t *ppos) 189 { 190 struct seq_file *s = file->private_data; 191 struct musb *musb = s->private; 192 u8 test = 0; 193 char buf[18]; 194 195 memset(buf, 0x00, sizeof(buf)); 196 197 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) 198 return -EFAULT; 199 200 if (!strncmp(buf, "force host", 9)) 201 test = MUSB_TEST_FORCE_HOST; 202 203 if (!strncmp(buf, "fifo access", 11)) 204 test = MUSB_TEST_FIFO_ACCESS; 205 206 if (!strncmp(buf, "force full-speed", 15)) 207 test = MUSB_TEST_FORCE_FS; 208 209 if (!strncmp(buf, "force high-speed", 15)) 210 test = MUSB_TEST_FORCE_HS; 211 212 if (!strncmp(buf, "test packet", 10)) { 213 test = MUSB_TEST_PACKET; 214 musb_load_testpacket(musb); 215 } 216 217 if (!strncmp(buf, "test K", 6)) 218 test = MUSB_TEST_K; 219 220 if (!strncmp(buf, "test J", 6)) 221 test = MUSB_TEST_J; 222 223 if (!strncmp(buf, "test SE0 NAK", 12)) 224 test = MUSB_TEST_SE0_NAK; 225 226 musb_writeb(musb->mregs, MUSB_TESTMODE, test); 227 228 return count; 229 } 230 231 static const struct file_operations musb_test_mode_fops = { 232 .open = musb_test_mode_open, 233 .write = musb_test_mode_write, 234 .read = seq_read, 235 .llseek = seq_lseek, 236 .release = single_release, 237 }; 238 239 int musb_init_debugfs(struct musb *musb) 240 { 241 struct dentry *root; 242 struct dentry *file; 243 int ret; 244 245 root = debugfs_create_dir(dev_name(musb->controller), NULL); 246 if (!root) { 247 ret = -ENOMEM; 248 goto err0; 249 } 250 251 file = debugfs_create_file("regdump", S_IRUGO, root, musb, 252 &musb_regdump_fops); 253 if (!file) { 254 ret = -ENOMEM; 255 goto err1; 256 } 257 258 file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, 259 root, musb, &musb_test_mode_fops); 260 if (!file) { 261 ret = -ENOMEM; 262 goto err1; 263 } 264 265 musb->debugfs_root = root; 266 267 return 0; 268 269 err1: 270 debugfs_remove_recursive(root); 271 272 err0: 273 return ret; 274 } 275 276 void /* __init_or_exit */ musb_exit_debugfs(struct musb *musb) 277 { 278 debugfs_remove_recursive(musb->debugfs_root); 279 } 280