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/kobject.h> 40#include <linux/platform_device.h> 41#include <linux/io.h> 42#include <linux/debugfs.h> 43#include <linux/seq_file.h> 44 45#ifdef CONFIG_ARM 46#include <mach/hardware.h> 47#include <mach/memory.h> 48#include <asm/mach-types.h> 49#endif 50 51#include <asm/uaccess.h> 52 53#include "musb_core.h" 54#include "musb_debug.h" 55 56#ifdef CONFIG_ARCH_DAVINCI 57#include "davinci.h" 58#endif 59 60struct musb_register_map { 61 char *name; 62 unsigned offset; 63 unsigned size; 64}; 65 66static const struct musb_register_map musb_regmap[] = { 67 { "FAddr", 0x00, 8 }, 68 { "Power", 0x01, 8 }, 69 { "Frame", 0x0c, 16 }, 70 { "Index", 0x0e, 8 }, 71 { "Testmode", 0x0f, 8 }, 72 { "TxMaxPp", 0x10, 16 }, 73 { "TxCSRp", 0x12, 16 }, 74 { "RxMaxPp", 0x14, 16 }, 75 { "RxCSR", 0x16, 16 }, 76 { "RxCount", 0x18, 16 }, 77 { "ConfigData", 0x1f, 8 }, 78 { "DevCtl", 0x60, 8 }, 79 { "MISC", 0x61, 8 }, 80 { "TxFIFOsz", 0x62, 8 }, 81 { "RxFIFOsz", 0x63, 8 }, 82 { "TxFIFOadd", 0x64, 16 }, 83 { "RxFIFOadd", 0x66, 16 }, 84 { "VControl", 0x68, 32 }, 85 { "HWVers", 0x6C, 16 }, 86 { "EPInfo", 0x78, 8 }, 87 { "RAMInfo", 0x79, 8 }, 88 { "LinkInfo", 0x7A, 8 }, 89 { "VPLen", 0x7B, 8 }, 90 { "HS_EOF1", 0x7C, 8 }, 91 { "FS_EOF1", 0x7D, 8 }, 92 { "LS_EOF1", 0x7E, 8 }, 93 { "SOFT_RST", 0x7F, 8 }, 94 { "DMA_CNTLch0", 0x204, 16 }, 95 { "DMA_ADDRch0", 0x208, 32 }, 96 { "DMA_COUNTch0", 0x20C, 32 }, 97 { "DMA_CNTLch1", 0x214, 16 }, 98 { "DMA_ADDRch1", 0x218, 32 }, 99 { "DMA_COUNTch1", 0x21C, 32 }, 100 { "DMA_CNTLch2", 0x224, 16 }, 101 { "DMA_ADDRch2", 0x228, 32 }, 102 { "DMA_COUNTch2", 0x22C, 32 }, 103 { "DMA_CNTLch3", 0x234, 16 }, 104 { "DMA_ADDRch3", 0x238, 32 }, 105 { "DMA_COUNTch3", 0x23C, 32 }, 106 { "DMA_CNTLch4", 0x244, 16 }, 107 { "DMA_ADDRch4", 0x248, 32 }, 108 { "DMA_COUNTch4", 0x24C, 32 }, 109 { "DMA_CNTLch5", 0x254, 16 }, 110 { "DMA_ADDRch5", 0x258, 32 }, 111 { "DMA_COUNTch5", 0x25C, 32 }, 112 { "DMA_CNTLch6", 0x264, 16 }, 113 { "DMA_ADDRch6", 0x268, 32 }, 114 { "DMA_COUNTch6", 0x26C, 32 }, 115 { "DMA_CNTLch7", 0x274, 16 }, 116 { "DMA_ADDRch7", 0x278, 32 }, 117 { "DMA_COUNTch7", 0x27C, 32 }, 118 { } /* Terminating Entry */ 119}; 120 121static struct dentry *musb_debugfs_root; 122 123static int musb_regdump_show(struct seq_file *s, void *unused) 124{ 125 struct musb *musb = s->private; 126 unsigned i; 127 128 seq_printf(s, "MUSB (M)HDRC Register Dump\n"); 129 130 for (i = 0; i < ARRAY_SIZE(musb_regmap); i++) { 131 switch (musb_regmap[i].size) { 132 case 8: 133 seq_printf(s, "%-12s: %02x\n", musb_regmap[i].name, 134 musb_readb(musb->mregs, musb_regmap[i].offset)); 135 break; 136 case 16: 137 seq_printf(s, "%-12s: %04x\n", musb_regmap[i].name, 138 musb_readw(musb->mregs, musb_regmap[i].offset)); 139 break; 140 case 32: 141 seq_printf(s, "%-12s: %08x\n", musb_regmap[i].name, 142 musb_readl(musb->mregs, musb_regmap[i].offset)); 143 break; 144 } 145 } 146 147 return 0; 148} 149 150static int musb_regdump_open(struct inode *inode, struct file *file) 151{ 152 return single_open(file, musb_regdump_show, inode->i_private); 153} 154 155static int musb_test_mode_show(struct seq_file *s, void *unused) 156{ 157 struct musb *musb = s->private; 158 unsigned test; 159 160 test = musb_readb(musb->mregs, MUSB_TESTMODE); 161 162 if (test & MUSB_TEST_FORCE_HOST) 163 seq_printf(s, "force host\n"); 164 165 if (test & MUSB_TEST_FIFO_ACCESS) 166 seq_printf(s, "fifo access\n"); 167 168 if (test & MUSB_TEST_FORCE_FS) 169 seq_printf(s, "force full-speed\n"); 170 171 if (test & MUSB_TEST_FORCE_HS) 172 seq_printf(s, "force high-speed\n"); 173 174 if (test & MUSB_TEST_PACKET) 175 seq_printf(s, "test packet\n"); 176 177 if (test & MUSB_TEST_K) 178 seq_printf(s, "test K\n"); 179 180 if (test & MUSB_TEST_J) 181 seq_printf(s, "test J\n"); 182 183 if (test & MUSB_TEST_SE0_NAK) 184 seq_printf(s, "test SE0 NAK\n"); 185 186 return 0; 187} 188 189static const struct file_operations musb_regdump_fops = { 190 .open = musb_regdump_open, 191 .read = seq_read, 192 .llseek = seq_lseek, 193 .release = single_release, 194}; 195 196static int musb_test_mode_open(struct inode *inode, struct file *file) 197{ 198 return single_open(file, musb_test_mode_show, inode->i_private); 199} 200 201static ssize_t musb_test_mode_write(struct file *file, 202 const char __user *ubuf, size_t count, loff_t *ppos) 203{ 204 struct seq_file *s = file->private_data; 205 struct musb *musb = s->private; 206 u8 test = 0; 207 char buf[18]; 208 209 memset(buf, 0x00, sizeof(buf)); 210 211 if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) 212 return -EFAULT; 213 214 if (!strncmp(buf, "force host", 9)) 215 test = MUSB_TEST_FORCE_HOST; 216 217 if (!strncmp(buf, "fifo access", 11)) 218 test = MUSB_TEST_FIFO_ACCESS; 219 220 if (!strncmp(buf, "force full-speed", 15)) 221 test = MUSB_TEST_FORCE_FS; 222 223 if (!strncmp(buf, "force high-speed", 15)) 224 test = MUSB_TEST_FORCE_HS; 225 226 if (!strncmp(buf, "test packet", 10)) { 227 test = MUSB_TEST_PACKET; 228 musb_load_testpacket(musb); 229 } 230 231 if (!strncmp(buf, "test K", 6)) 232 test = MUSB_TEST_K; 233 234 if (!strncmp(buf, "test J", 6)) 235 test = MUSB_TEST_J; 236 237 if (!strncmp(buf, "test SE0 NAK", 12)) 238 test = MUSB_TEST_SE0_NAK; 239 240 musb_writeb(musb->mregs, MUSB_TESTMODE, test); 241 242 return count; 243} 244 245static const struct file_operations musb_test_mode_fops = { 246 .open = musb_test_mode_open, 247 .write = musb_test_mode_write, 248 .read = seq_read, 249 .llseek = seq_lseek, 250 .release = single_release, 251}; 252 253int __init musb_init_debugfs(struct musb *musb) 254{ 255 struct dentry *root; 256 struct dentry *file; 257 int ret; 258 259 root = debugfs_create_dir("musb", NULL); 260 if (IS_ERR(root)) { 261 ret = PTR_ERR(root); 262 goto err0; 263 } 264 265 file = debugfs_create_file("regdump", S_IRUGO, root, musb, 266 &musb_regdump_fops); 267 if (IS_ERR(file)) { 268 ret = PTR_ERR(file); 269 goto err1; 270 } 271 272 file = debugfs_create_file("testmode", S_IRUGO | S_IWUSR, 273 root, musb, &musb_test_mode_fops); 274 if (IS_ERR(file)) { 275 ret = PTR_ERR(file); 276 goto err1; 277 } 278 279 musb_debugfs_root = root; 280 281 return 0; 282 283err1: 284 debugfs_remove_recursive(root); 285 286err0: 287 return ret; 288} 289 290void /* __init_or_exit */ musb_exit_debugfs(struct musb *musb) 291{ 292 debugfs_remove_recursive(musb_debugfs_root); 293} 294