Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * Character-device access to raw MTD devices. |
| 3 | * |
| 4 | */ |
| 5 | |
Thomas Gleixner | 15fdc52 | 2005-11-07 00:14:42 +0100 | [diff] [blame] | 6 | #include <linux/device.h> |
| 7 | #include <linux/fs.h> |
Andrew Morton | 0c1eafd | 2007-08-10 13:01:06 -0700 | [diff] [blame] | 8 | #include <linux/mm.h> |
Artem Bityutskiy | 9c74034 | 2006-10-11 14:52:47 +0300 | [diff] [blame] | 9 | #include <linux/err.h> |
Thomas Gleixner | 15fdc52 | 2005-11-07 00:14:42 +0100 | [diff] [blame] | 10 | #include <linux/init.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #include <linux/kernel.h> |
| 12 | #include <linux/module.h> |
Thomas Gleixner | 15fdc52 | 2005-11-07 00:14:42 +0100 | [diff] [blame] | 13 | #include <linux/slab.h> |
| 14 | #include <linux/sched.h> |
Jonathan Corbet | 6071239 | 2008-05-15 10:10:37 -0600 | [diff] [blame] | 15 | #include <linux/smp_lock.h> |
Thomas Gleixner | 15fdc52 | 2005-11-07 00:14:42 +0100 | [diff] [blame] | 16 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/mtd/mtd.h> |
| 18 | #include <linux/mtd/compatmac.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | |
Thomas Gleixner | 15fdc52 | 2005-11-07 00:14:42 +0100 | [diff] [blame] | 20 | #include <asm/uaccess.h> |
Todd Poynor | 9bc7b38 | 2005-06-30 01:23:27 +0100 | [diff] [blame] | 21 | |
| 22 | static struct class *mtd_class; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
| 24 | static void mtd_notify_add(struct mtd_info* mtd) |
| 25 | { |
| 26 | if (!mtd) |
| 27 | return; |
| 28 | |
Greg Kroah-Hartman | daea34b | 2008-05-21 12:52:33 -0700 | [diff] [blame] | 29 | device_create_drvdata(mtd_class, NULL, |
| 30 | MKDEV(MTD_CHAR_MAJOR, mtd->index*2), |
| 31 | NULL, "mtd%d", mtd->index); |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 32 | |
Greg Kroah-Hartman | daea34b | 2008-05-21 12:52:33 -0700 | [diff] [blame] | 33 | device_create_drvdata(mtd_class, NULL, |
| 34 | MKDEV(MTD_CHAR_MAJOR, mtd->index*2+1), |
| 35 | NULL, "mtd%dro", mtd->index); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | } |
| 37 | |
| 38 | static void mtd_notify_remove(struct mtd_info* mtd) |
| 39 | { |
| 40 | if (!mtd) |
| 41 | return; |
Todd Poynor | 9bc7b38 | 2005-06-30 01:23:27 +0100 | [diff] [blame] | 42 | |
Tony Jones | a98894a | 2007-09-25 02:03:03 +0200 | [diff] [blame] | 43 | device_destroy(mtd_class, MKDEV(MTD_CHAR_MAJOR, mtd->index*2)); |
| 44 | device_destroy(mtd_class, MKDEV(MTD_CHAR_MAJOR, mtd->index*2+1)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | } |
| 46 | |
| 47 | static struct mtd_notifier notifier = { |
| 48 | .add = mtd_notify_add, |
| 49 | .remove = mtd_notify_remove, |
| 50 | }; |
| 51 | |
Nicolas Pitre | 045e9a5 | 2005-02-08 19:12:53 +0000 | [diff] [blame] | 52 | /* |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 53 | * Data structure to hold the pointer to the mtd device as well |
| 54 | * as mode information ofr various use cases. |
Nicolas Pitre | 045e9a5 | 2005-02-08 19:12:53 +0000 | [diff] [blame] | 55 | */ |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 56 | struct mtd_file_info { |
| 57 | struct mtd_info *mtd; |
| 58 | enum mtd_file_modes mode; |
| 59 | }; |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 60 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | static loff_t mtd_lseek (struct file *file, loff_t offset, int orig) |
| 62 | { |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 63 | struct mtd_file_info *mfi = file->private_data; |
| 64 | struct mtd_info *mtd = mfi->mtd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | |
| 66 | switch (orig) { |
Josef 'Jeff' Sipek | ea59830 | 2006-09-16 21:09:29 -0400 | [diff] [blame] | 67 | case SEEK_SET: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | break; |
Josef 'Jeff' Sipek | ea59830 | 2006-09-16 21:09:29 -0400 | [diff] [blame] | 69 | case SEEK_CUR: |
Todd Poynor | 8b491d7 | 2005-08-04 02:05:51 +0100 | [diff] [blame] | 70 | offset += file->f_pos; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | break; |
Josef 'Jeff' Sipek | ea59830 | 2006-09-16 21:09:29 -0400 | [diff] [blame] | 72 | case SEEK_END: |
Todd Poynor | 8b491d7 | 2005-08-04 02:05:51 +0100 | [diff] [blame] | 73 | offset += mtd->size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | break; |
| 75 | default: |
| 76 | return -EINVAL; |
| 77 | } |
| 78 | |
Herbert Valerio Riedel | 1887f51 | 2006-06-24 00:03:36 +0200 | [diff] [blame] | 79 | if (offset >= 0 && offset <= mtd->size) |
Todd Poynor | 8b491d7 | 2005-08-04 02:05:51 +0100 | [diff] [blame] | 80 | return file->f_pos = offset; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | |
Todd Poynor | 8b491d7 | 2005-08-04 02:05:51 +0100 | [diff] [blame] | 82 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | } |
| 84 | |
| 85 | |
| 86 | |
| 87 | static int mtd_open(struct inode *inode, struct file *file) |
| 88 | { |
| 89 | int minor = iminor(inode); |
| 90 | int devnum = minor >> 1; |
Jonathan Corbet | 6071239 | 2008-05-15 10:10:37 -0600 | [diff] [blame] | 91 | int ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | struct mtd_info *mtd; |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 93 | struct mtd_file_info *mfi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | |
| 95 | DEBUG(MTD_DEBUG_LEVEL0, "MTD_open\n"); |
| 96 | |
| 97 | if (devnum >= MAX_MTD_DEVICES) |
| 98 | return -ENODEV; |
| 99 | |
| 100 | /* You can't open the RO devices RW */ |
| 101 | if ((file->f_mode & 2) && (minor & 1)) |
| 102 | return -EACCES; |
| 103 | |
Jonathan Corbet | 6071239 | 2008-05-15 10:10:37 -0600 | [diff] [blame] | 104 | lock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | mtd = get_mtd_device(NULL, devnum); |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 106 | |
Jonathan Corbet | 6071239 | 2008-05-15 10:10:37 -0600 | [diff] [blame] | 107 | if (IS_ERR(mtd)) { |
| 108 | ret = PTR_ERR(mtd); |
| 109 | goto out; |
| 110 | } |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 111 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | if (MTD_ABSENT == mtd->type) { |
| 113 | put_mtd_device(mtd); |
Jonathan Corbet | 6071239 | 2008-05-15 10:10:37 -0600 | [diff] [blame] | 114 | ret = -ENODEV; |
| 115 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | } |
| 117 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | /* You can't open it RW if it's not a writeable device */ |
| 119 | if ((file->f_mode & 2) && !(mtd->flags & MTD_WRITEABLE)) { |
| 120 | put_mtd_device(mtd); |
Jonathan Corbet | 6071239 | 2008-05-15 10:10:37 -0600 | [diff] [blame] | 121 | ret = -EACCES; |
| 122 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | } |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 124 | |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 125 | mfi = kzalloc(sizeof(*mfi), GFP_KERNEL); |
| 126 | if (!mfi) { |
| 127 | put_mtd_device(mtd); |
Jonathan Corbet | 6071239 | 2008-05-15 10:10:37 -0600 | [diff] [blame] | 128 | ret = -ENOMEM; |
| 129 | goto out; |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 130 | } |
| 131 | mfi->mtd = mtd; |
| 132 | file->private_data = mfi; |
| 133 | |
Jonathan Corbet | 6071239 | 2008-05-15 10:10:37 -0600 | [diff] [blame] | 134 | out: |
| 135 | unlock_kernel(); |
| 136 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | } /* mtd_open */ |
| 138 | |
| 139 | /*====================================================================*/ |
| 140 | |
| 141 | static int mtd_close(struct inode *inode, struct file *file) |
| 142 | { |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 143 | struct mtd_file_info *mfi = file->private_data; |
| 144 | struct mtd_info *mtd = mfi->mtd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | |
| 146 | DEBUG(MTD_DEBUG_LEVEL0, "MTD_close\n"); |
| 147 | |
Joakim Tjernlund | 7eafaed | 2007-06-27 00:56:40 +0200 | [diff] [blame] | 148 | /* Only sync if opened RW */ |
| 149 | if ((file->f_mode & 2) && mtd->sync) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | mtd->sync(mtd); |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 151 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | put_mtd_device(mtd); |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 153 | file->private_data = NULL; |
| 154 | kfree(mfi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | |
| 156 | return 0; |
| 157 | } /* mtd_close */ |
| 158 | |
| 159 | /* FIXME: This _really_ needs to die. In 2.5, we should lock the |
| 160 | userspace buffer down and use it directly with readv/writev. |
| 161 | */ |
| 162 | #define MAX_KMALLOC_SIZE 0x20000 |
| 163 | |
| 164 | static ssize_t mtd_read(struct file *file, char __user *buf, size_t count,loff_t *ppos) |
| 165 | { |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 166 | struct mtd_file_info *mfi = file->private_data; |
| 167 | struct mtd_info *mtd = mfi->mtd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | size_t retlen=0; |
| 169 | size_t total_retlen=0; |
| 170 | int ret=0; |
| 171 | int len; |
| 172 | char *kbuf; |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 173 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | DEBUG(MTD_DEBUG_LEVEL0,"MTD_read\n"); |
| 175 | |
| 176 | if (*ppos + count > mtd->size) |
| 177 | count = mtd->size - *ppos; |
| 178 | |
| 179 | if (!count) |
| 180 | return 0; |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 181 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | /* FIXME: Use kiovec in 2.5 to lock down the user's buffers |
| 183 | and pass them directly to the MTD functions */ |
Thago Galesi | b802c07 | 2006-04-17 17:38:15 +0100 | [diff] [blame] | 184 | |
| 185 | if (count > MAX_KMALLOC_SIZE) |
| 186 | kbuf=kmalloc(MAX_KMALLOC_SIZE, GFP_KERNEL); |
| 187 | else |
| 188 | kbuf=kmalloc(count, GFP_KERNEL); |
| 189 | |
| 190 | if (!kbuf) |
| 191 | return -ENOMEM; |
| 192 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | while (count) { |
Thago Galesi | b802c07 | 2006-04-17 17:38:15 +0100 | [diff] [blame] | 194 | |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 195 | if (count > MAX_KMALLOC_SIZE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | len = MAX_KMALLOC_SIZE; |
| 197 | else |
| 198 | len = count; |
| 199 | |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 200 | switch (mfi->mode) { |
| 201 | case MTD_MODE_OTP_FACTORY: |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 202 | ret = mtd->read_fact_prot_reg(mtd, *ppos, len, &retlen, kbuf); |
| 203 | break; |
| 204 | case MTD_MODE_OTP_USER: |
| 205 | ret = mtd->read_user_prot_reg(mtd, *ppos, len, &retlen, kbuf); |
| 206 | break; |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 207 | case MTD_MODE_RAW: |
| 208 | { |
| 209 | struct mtd_oob_ops ops; |
| 210 | |
| 211 | ops.mode = MTD_OOB_RAW; |
| 212 | ops.datbuf = kbuf; |
| 213 | ops.oobbuf = NULL; |
| 214 | ops.len = len; |
| 215 | |
| 216 | ret = mtd->read_oob(mtd, *ppos, &ops); |
| 217 | retlen = ops.retlen; |
| 218 | break; |
| 219 | } |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 220 | default: |
Thomas Gleixner | f4a43cf | 2006-05-28 11:01:53 +0200 | [diff] [blame] | 221 | ret = mtd->read(mtd, *ppos, len, &retlen, kbuf); |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 222 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | /* Nand returns -EBADMSG on ecc errors, but it returns |
| 224 | * the data. For our userspace tools it is important |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 225 | * to dump areas with ecc errors ! |
Thomas Gleixner | 9a1fcdf | 2006-05-29 14:56:39 +0200 | [diff] [blame] | 226 | * For kernel internal usage it also might return -EUCLEAN |
| 227 | * to signal the caller that a bitflip has occured and has |
| 228 | * been corrected by the ECC algorithm. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | * Userspace software which accesses NAND this way |
| 230 | * must be aware of the fact that it deals with NAND |
| 231 | */ |
Thomas Gleixner | 9a1fcdf | 2006-05-29 14:56:39 +0200 | [diff] [blame] | 232 | if (!ret || (ret == -EUCLEAN) || (ret == -EBADMSG)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | *ppos += retlen; |
| 234 | if (copy_to_user(buf, kbuf, retlen)) { |
Thomas Gleixner | f4a43cf | 2006-05-28 11:01:53 +0200 | [diff] [blame] | 235 | kfree(kbuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | return -EFAULT; |
| 237 | } |
| 238 | else |
| 239 | total_retlen += retlen; |
| 240 | |
| 241 | count -= retlen; |
| 242 | buf += retlen; |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 243 | if (retlen == 0) |
| 244 | count = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | } |
| 246 | else { |
| 247 | kfree(kbuf); |
| 248 | return ret; |
| 249 | } |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 250 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | } |
| 252 | |
Thago Galesi | b802c07 | 2006-04-17 17:38:15 +0100 | [diff] [blame] | 253 | kfree(kbuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | return total_retlen; |
| 255 | } /* mtd_read */ |
| 256 | |
| 257 | static ssize_t mtd_write(struct file *file, const char __user *buf, size_t count,loff_t *ppos) |
| 258 | { |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 259 | struct mtd_file_info *mfi = file->private_data; |
| 260 | struct mtd_info *mtd = mfi->mtd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | char *kbuf; |
| 262 | size_t retlen; |
| 263 | size_t total_retlen=0; |
| 264 | int ret=0; |
| 265 | int len; |
| 266 | |
| 267 | DEBUG(MTD_DEBUG_LEVEL0,"MTD_write\n"); |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 268 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | if (*ppos == mtd->size) |
| 270 | return -ENOSPC; |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 271 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | if (*ppos + count > mtd->size) |
| 273 | count = mtd->size - *ppos; |
| 274 | |
| 275 | if (!count) |
| 276 | return 0; |
| 277 | |
Thago Galesi | b802c07 | 2006-04-17 17:38:15 +0100 | [diff] [blame] | 278 | if (count > MAX_KMALLOC_SIZE) |
| 279 | kbuf=kmalloc(MAX_KMALLOC_SIZE, GFP_KERNEL); |
| 280 | else |
| 281 | kbuf=kmalloc(count, GFP_KERNEL); |
| 282 | |
| 283 | if (!kbuf) |
| 284 | return -ENOMEM; |
| 285 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | while (count) { |
Thago Galesi | b802c07 | 2006-04-17 17:38:15 +0100 | [diff] [blame] | 287 | |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 288 | if (count > MAX_KMALLOC_SIZE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | len = MAX_KMALLOC_SIZE; |
| 290 | else |
| 291 | len = count; |
| 292 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | if (copy_from_user(kbuf, buf, len)) { |
| 294 | kfree(kbuf); |
| 295 | return -EFAULT; |
| 296 | } |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 297 | |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 298 | switch (mfi->mode) { |
| 299 | case MTD_MODE_OTP_FACTORY: |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 300 | ret = -EROFS; |
| 301 | break; |
| 302 | case MTD_MODE_OTP_USER: |
| 303 | if (!mtd->write_user_prot_reg) { |
| 304 | ret = -EOPNOTSUPP; |
| 305 | break; |
| 306 | } |
| 307 | ret = mtd->write_user_prot_reg(mtd, *ppos, len, &retlen, kbuf); |
| 308 | break; |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 309 | |
| 310 | case MTD_MODE_RAW: |
| 311 | { |
| 312 | struct mtd_oob_ops ops; |
| 313 | |
| 314 | ops.mode = MTD_OOB_RAW; |
| 315 | ops.datbuf = kbuf; |
| 316 | ops.oobbuf = NULL; |
| 317 | ops.len = len; |
| 318 | |
| 319 | ret = mtd->write_oob(mtd, *ppos, &ops); |
| 320 | retlen = ops.retlen; |
| 321 | break; |
| 322 | } |
| 323 | |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 324 | default: |
| 325 | ret = (*(mtd->write))(mtd, *ppos, len, &retlen, kbuf); |
| 326 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | if (!ret) { |
| 328 | *ppos += retlen; |
| 329 | total_retlen += retlen; |
| 330 | count -= retlen; |
| 331 | buf += retlen; |
| 332 | } |
| 333 | else { |
| 334 | kfree(kbuf); |
| 335 | return ret; |
| 336 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | } |
| 338 | |
Thago Galesi | b802c07 | 2006-04-17 17:38:15 +0100 | [diff] [blame] | 339 | kfree(kbuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | return total_retlen; |
| 341 | } /* mtd_write */ |
| 342 | |
| 343 | /*====================================================================== |
| 344 | |
| 345 | IOCTL calls for getting device parameters. |
| 346 | |
| 347 | ======================================================================*/ |
| 348 | static void mtdchar_erase_callback (struct erase_info *instr) |
| 349 | { |
| 350 | wake_up((wait_queue_head_t *)instr->priv); |
| 351 | } |
| 352 | |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 353 | #if defined(CONFIG_MTD_OTP) || defined(CONFIG_MTD_ONENAND_OTP) |
| 354 | static int otp_select_filemode(struct mtd_file_info *mfi, int mode) |
| 355 | { |
| 356 | struct mtd_info *mtd = mfi->mtd; |
| 357 | int ret = 0; |
| 358 | |
| 359 | switch (mode) { |
| 360 | case MTD_OTP_FACTORY: |
| 361 | if (!mtd->read_fact_prot_reg) |
| 362 | ret = -EOPNOTSUPP; |
| 363 | else |
| 364 | mfi->mode = MTD_MODE_OTP_FACTORY; |
| 365 | break; |
| 366 | case MTD_OTP_USER: |
| 367 | if (!mtd->read_fact_prot_reg) |
| 368 | ret = -EOPNOTSUPP; |
| 369 | else |
| 370 | mfi->mode = MTD_MODE_OTP_USER; |
| 371 | break; |
| 372 | default: |
| 373 | ret = -EINVAL; |
| 374 | case MTD_OTP_OFF: |
| 375 | break; |
| 376 | } |
| 377 | return ret; |
| 378 | } |
| 379 | #else |
| 380 | # define otp_select_filemode(f,m) -EOPNOTSUPP |
| 381 | #endif |
| 382 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | static int mtd_ioctl(struct inode *inode, struct file *file, |
| 384 | u_int cmd, u_long arg) |
| 385 | { |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 386 | struct mtd_file_info *mfi = file->private_data; |
| 387 | struct mtd_info *mtd = mfi->mtd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | void __user *argp = (void __user *)arg; |
| 389 | int ret = 0; |
| 390 | u_long size; |
Joern Engel | 73c619e | 2006-05-30 14:25:35 +0200 | [diff] [blame] | 391 | struct mtd_info_user info; |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 392 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | DEBUG(MTD_DEBUG_LEVEL0, "MTD_ioctl\n"); |
| 394 | |
| 395 | size = (cmd & IOCSIZE_MASK) >> IOCSIZE_SHIFT; |
| 396 | if (cmd & IOC_IN) { |
| 397 | if (!access_ok(VERIFY_READ, argp, size)) |
| 398 | return -EFAULT; |
| 399 | } |
| 400 | if (cmd & IOC_OUT) { |
| 401 | if (!access_ok(VERIFY_WRITE, argp, size)) |
| 402 | return -EFAULT; |
| 403 | } |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 404 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | switch (cmd) { |
| 406 | case MEMGETREGIONCOUNT: |
| 407 | if (copy_to_user(argp, &(mtd->numeraseregions), sizeof(int))) |
| 408 | return -EFAULT; |
| 409 | break; |
| 410 | |
| 411 | case MEMGETREGIONINFO: |
| 412 | { |
Zev Weiss | b67c5f8 | 2008-09-01 05:02:12 -0700 | [diff] [blame] | 413 | uint32_t ur_idx; |
| 414 | struct mtd_erase_region_info *kr; |
| 415 | struct region_info_user *ur = (struct region_info_user *) argp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | |
Zev Weiss | b67c5f8 | 2008-09-01 05:02:12 -0700 | [diff] [blame] | 417 | if (get_user(ur_idx, &(ur->regionindex))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | return -EFAULT; |
| 419 | |
Zev Weiss | b67c5f8 | 2008-09-01 05:02:12 -0700 | [diff] [blame] | 420 | kr = &(mtd->eraseregions[ur_idx]); |
| 421 | |
| 422 | if (put_user(kr->offset, &(ur->offset)) |
| 423 | || put_user(kr->erasesize, &(ur->erasesize)) |
| 424 | || put_user(kr->numblocks, &(ur->numblocks))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | return -EFAULT; |
Zev Weiss | b67c5f8 | 2008-09-01 05:02:12 -0700 | [diff] [blame] | 426 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | break; |
| 428 | } |
| 429 | |
| 430 | case MEMGETINFO: |
Joern Engel | 73c619e | 2006-05-30 14:25:35 +0200 | [diff] [blame] | 431 | info.type = mtd->type; |
| 432 | info.flags = mtd->flags; |
| 433 | info.size = mtd->size; |
| 434 | info.erasesize = mtd->erasesize; |
| 435 | info.writesize = mtd->writesize; |
| 436 | info.oobsize = mtd->oobsize; |
Artem Bityutskiy | 64f6071 | 2007-01-30 10:50:43 +0200 | [diff] [blame] | 437 | /* The below fields are obsolete */ |
| 438 | info.ecctype = -1; |
| 439 | info.eccsize = 0; |
Joern Engel | 73c619e | 2006-05-30 14:25:35 +0200 | [diff] [blame] | 440 | if (copy_to_user(argp, &info, sizeof(struct mtd_info_user))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 441 | return -EFAULT; |
| 442 | break; |
| 443 | |
| 444 | case MEMERASE: |
| 445 | { |
| 446 | struct erase_info *erase; |
| 447 | |
| 448 | if(!(file->f_mode & 2)) |
| 449 | return -EPERM; |
| 450 | |
Burman Yan | 95b93a0 | 2006-11-15 21:10:29 +0200 | [diff] [blame] | 451 | erase=kzalloc(sizeof(struct erase_info),GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | if (!erase) |
| 453 | ret = -ENOMEM; |
| 454 | else { |
| 455 | wait_queue_head_t waitq; |
| 456 | DECLARE_WAITQUEUE(wait, current); |
| 457 | |
| 458 | init_waitqueue_head(&waitq); |
| 459 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | if (copy_from_user(&erase->addr, argp, |
| 461 | sizeof(struct erase_info_user))) { |
| 462 | kfree(erase); |
| 463 | return -EFAULT; |
| 464 | } |
| 465 | erase->mtd = mtd; |
| 466 | erase->callback = mtdchar_erase_callback; |
| 467 | erase->priv = (unsigned long)&waitq; |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 468 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | /* |
| 470 | FIXME: Allow INTERRUPTIBLE. Which means |
| 471 | not having the wait_queue head on the stack. |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 472 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | If the wq_head is on the stack, and we |
| 474 | leave because we got interrupted, then the |
| 475 | wq_head is no longer there when the |
| 476 | callback routine tries to wake us up. |
| 477 | */ |
| 478 | ret = mtd->erase(mtd, erase); |
| 479 | if (!ret) { |
| 480 | set_current_state(TASK_UNINTERRUPTIBLE); |
| 481 | add_wait_queue(&waitq, &wait); |
| 482 | if (erase->state != MTD_ERASE_DONE && |
| 483 | erase->state != MTD_ERASE_FAILED) |
| 484 | schedule(); |
| 485 | remove_wait_queue(&waitq, &wait); |
| 486 | set_current_state(TASK_RUNNING); |
| 487 | |
| 488 | ret = (erase->state == MTD_ERASE_FAILED)?-EIO:0; |
| 489 | } |
| 490 | kfree(erase); |
| 491 | } |
| 492 | break; |
| 493 | } |
| 494 | |
| 495 | case MEMWRITEOOB: |
| 496 | { |
| 497 | struct mtd_oob_buf buf; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 498 | struct mtd_oob_ops ops; |
Harvey Harrison | 5f69283 | 2008-07-03 23:40:13 -0700 | [diff] [blame] | 499 | struct mtd_oob_buf __user *user_buf = argp; |
David Scidmore | e9d8d48 | 2007-12-11 17:44:30 -0600 | [diff] [blame] | 500 | uint32_t retlen; |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 501 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | if(!(file->f_mode & 2)) |
| 503 | return -EPERM; |
| 504 | |
| 505 | if (copy_from_user(&buf, argp, sizeof(struct mtd_oob_buf))) |
| 506 | return -EFAULT; |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 507 | |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 508 | if (buf.length > 4096) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | return -EINVAL; |
| 510 | |
| 511 | if (!mtd->write_oob) |
| 512 | ret = -EOPNOTSUPP; |
| 513 | else |
| 514 | ret = access_ok(VERIFY_READ, buf.ptr, |
| 515 | buf.length) ? 0 : EFAULT; |
| 516 | |
| 517 | if (ret) |
| 518 | return ret; |
| 519 | |
Thomas Gleixner | 7bc3312 | 2006-06-20 20:05:05 +0200 | [diff] [blame] | 520 | ops.ooblen = buf.length; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 521 | ops.ooboffs = buf.start & (mtd->oobsize - 1); |
| 522 | ops.datbuf = NULL; |
| 523 | ops.mode = MTD_OOB_PLACE; |
| 524 | |
Vitaly Wool | 7014568 | 2006-11-03 18:20:38 +0300 | [diff] [blame] | 525 | if (ops.ooboffs && ops.ooblen > (mtd->oobsize - ops.ooboffs)) |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 526 | return -EINVAL; |
| 527 | |
| 528 | ops.oobbuf = kmalloc(buf.length, GFP_KERNEL); |
| 529 | if (!ops.oobbuf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | return -ENOMEM; |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 531 | |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 532 | if (copy_from_user(ops.oobbuf, buf.ptr, buf.length)) { |
| 533 | kfree(ops.oobbuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | return -EFAULT; |
| 535 | } |
| 536 | |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 537 | buf.start &= ~(mtd->oobsize - 1); |
| 538 | ret = mtd->write_oob(mtd, buf.start, &ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | |
David Scidmore | e9d8d48 | 2007-12-11 17:44:30 -0600 | [diff] [blame] | 540 | if (ops.oobretlen > 0xFFFFFFFFU) |
| 541 | ret = -EOVERFLOW; |
| 542 | retlen = ops.oobretlen; |
Harvey Harrison | 5f69283 | 2008-07-03 23:40:13 -0700 | [diff] [blame] | 543 | if (copy_to_user(&user_buf->length, &retlen, sizeof(buf.length))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | ret = -EFAULT; |
| 545 | |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 546 | kfree(ops.oobbuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | break; |
| 548 | |
| 549 | } |
| 550 | |
| 551 | case MEMREADOOB: |
| 552 | { |
| 553 | struct mtd_oob_buf buf; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 554 | struct mtd_oob_ops ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | |
| 556 | if (copy_from_user(&buf, argp, sizeof(struct mtd_oob_buf))) |
| 557 | return -EFAULT; |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 558 | |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 559 | if (buf.length > 4096) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | return -EINVAL; |
| 561 | |
| 562 | if (!mtd->read_oob) |
| 563 | ret = -EOPNOTSUPP; |
| 564 | else |
| 565 | ret = access_ok(VERIFY_WRITE, buf.ptr, |
| 566 | buf.length) ? 0 : -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 567 | if (ret) |
| 568 | return ret; |
| 569 | |
Thomas Gleixner | 7bc3312 | 2006-06-20 20:05:05 +0200 | [diff] [blame] | 570 | ops.ooblen = buf.length; |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 571 | ops.ooboffs = buf.start & (mtd->oobsize - 1); |
| 572 | ops.datbuf = NULL; |
| 573 | ops.mode = MTD_OOB_PLACE; |
| 574 | |
Thomas Gleixner | 408b483 | 2007-04-13 19:50:48 +0200 | [diff] [blame] | 575 | if (ops.ooboffs && ops.ooblen > (mtd->oobsize - ops.ooboffs)) |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 576 | return -EINVAL; |
| 577 | |
| 578 | ops.oobbuf = kmalloc(buf.length, GFP_KERNEL); |
| 579 | if (!ops.oobbuf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | return -ENOMEM; |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 581 | |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 582 | buf.start &= ~(mtd->oobsize - 1); |
| 583 | ret = mtd->read_oob(mtd, buf.start, &ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | |
Vitaly Wool | 7014568 | 2006-11-03 18:20:38 +0300 | [diff] [blame] | 585 | if (put_user(ops.oobretlen, (uint32_t __user *)argp)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | ret = -EFAULT; |
Vitaly Wool | 7014568 | 2006-11-03 18:20:38 +0300 | [diff] [blame] | 587 | else if (ops.oobretlen && copy_to_user(buf.ptr, ops.oobbuf, |
| 588 | ops.oobretlen)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | ret = -EFAULT; |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 590 | |
Thomas Gleixner | 8593fbc | 2006-05-29 03:26:58 +0200 | [diff] [blame] | 591 | kfree(ops.oobbuf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | break; |
| 593 | } |
| 594 | |
| 595 | case MEMLOCK: |
| 596 | { |
Harvey Harrison | 175428b | 2008-07-03 23:40:14 -0700 | [diff] [blame] | 597 | struct erase_info_user einfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | |
Harvey Harrison | 175428b | 2008-07-03 23:40:14 -0700 | [diff] [blame] | 599 | if (copy_from_user(&einfo, argp, sizeof(einfo))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 600 | return -EFAULT; |
| 601 | |
| 602 | if (!mtd->lock) |
| 603 | ret = -EOPNOTSUPP; |
| 604 | else |
Harvey Harrison | 175428b | 2008-07-03 23:40:14 -0700 | [diff] [blame] | 605 | ret = mtd->lock(mtd, einfo.start, einfo.length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | break; |
| 607 | } |
| 608 | |
| 609 | case MEMUNLOCK: |
| 610 | { |
Harvey Harrison | 175428b | 2008-07-03 23:40:14 -0700 | [diff] [blame] | 611 | struct erase_info_user einfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 612 | |
Harvey Harrison | 175428b | 2008-07-03 23:40:14 -0700 | [diff] [blame] | 613 | if (copy_from_user(&einfo, argp, sizeof(einfo))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | return -EFAULT; |
| 615 | |
| 616 | if (!mtd->unlock) |
| 617 | ret = -EOPNOTSUPP; |
| 618 | else |
Harvey Harrison | 175428b | 2008-07-03 23:40:14 -0700 | [diff] [blame] | 619 | ret = mtd->unlock(mtd, einfo.start, einfo.length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 620 | break; |
| 621 | } |
| 622 | |
Thomas Gleixner | 5bd34c0 | 2006-05-27 22:16:10 +0200 | [diff] [blame] | 623 | /* Legacy interface */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | case MEMGETOOBSEL: |
| 625 | { |
Thomas Gleixner | 5bd34c0 | 2006-05-27 22:16:10 +0200 | [diff] [blame] | 626 | struct nand_oobinfo oi; |
| 627 | |
| 628 | if (!mtd->ecclayout) |
| 629 | return -EOPNOTSUPP; |
| 630 | if (mtd->ecclayout->eccbytes > ARRAY_SIZE(oi.eccpos)) |
| 631 | return -EINVAL; |
| 632 | |
| 633 | oi.useecc = MTD_NANDECC_AUTOPLACE; |
| 634 | memcpy(&oi.eccpos, mtd->ecclayout->eccpos, sizeof(oi.eccpos)); |
| 635 | memcpy(&oi.oobfree, mtd->ecclayout->oobfree, |
| 636 | sizeof(oi.oobfree)); |
Ricard Wanderlöf | d25ade7 | 2006-10-17 17:27:11 +0200 | [diff] [blame] | 637 | oi.eccbytes = mtd->ecclayout->eccbytes; |
Thomas Gleixner | 5bd34c0 | 2006-05-27 22:16:10 +0200 | [diff] [blame] | 638 | |
| 639 | if (copy_to_user(argp, &oi, sizeof(struct nand_oobinfo))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | return -EFAULT; |
| 641 | break; |
| 642 | } |
| 643 | |
| 644 | case MEMGETBADBLOCK: |
| 645 | { |
| 646 | loff_t offs; |
Thomas Gleixner | 97894cd | 2005-11-07 11:15:26 +0000 | [diff] [blame] | 647 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 648 | if (copy_from_user(&offs, argp, sizeof(loff_t))) |
| 649 | return -EFAULT; |
| 650 | if (!mtd->block_isbad) |
| 651 | ret = -EOPNOTSUPP; |
| 652 | else |
| 653 | return mtd->block_isbad(mtd, offs); |
| 654 | break; |
| 655 | } |
| 656 | |
| 657 | case MEMSETBADBLOCK: |
| 658 | { |
| 659 | loff_t offs; |
| 660 | |
| 661 | if (copy_from_user(&offs, argp, sizeof(loff_t))) |
| 662 | return -EFAULT; |
| 663 | if (!mtd->block_markbad) |
| 664 | ret = -EOPNOTSUPP; |
| 665 | else |
| 666 | return mtd->block_markbad(mtd, offs); |
| 667 | break; |
| 668 | } |
| 669 | |
Kyungmin Park | 493c646 | 2006-05-12 17:03:07 +0300 | [diff] [blame] | 670 | #if defined(CONFIG_MTD_OTP) || defined(CONFIG_MTD_ONENAND_OTP) |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 671 | case OTPSELECT: |
| 672 | { |
| 673 | int mode; |
| 674 | if (copy_from_user(&mode, argp, sizeof(int))) |
| 675 | return -EFAULT; |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 676 | |
| 677 | mfi->mode = MTD_MODE_NORMAL; |
| 678 | |
| 679 | ret = otp_select_filemode(mfi, mode); |
| 680 | |
Nicolas Pitre | 81dba48 | 2005-04-01 16:36:15 +0100 | [diff] [blame] | 681 | file->f_pos = 0; |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 682 | break; |
| 683 | } |
| 684 | |
| 685 | case OTPGETREGIONCOUNT: |
| 686 | case OTPGETREGIONINFO: |
| 687 | { |
| 688 | struct otp_info *buf = kmalloc(4096, GFP_KERNEL); |
| 689 | if (!buf) |
| 690 | return -ENOMEM; |
| 691 | ret = -EOPNOTSUPP; |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 692 | switch (mfi->mode) { |
| 693 | case MTD_MODE_OTP_FACTORY: |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 694 | if (mtd->get_fact_prot_info) |
| 695 | ret = mtd->get_fact_prot_info(mtd, buf, 4096); |
| 696 | break; |
| 697 | case MTD_MODE_OTP_USER: |
| 698 | if (mtd->get_user_prot_info) |
| 699 | ret = mtd->get_user_prot_info(mtd, buf, 4096); |
| 700 | break; |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 701 | default: |
| 702 | break; |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 703 | } |
| 704 | if (ret >= 0) { |
| 705 | if (cmd == OTPGETREGIONCOUNT) { |
| 706 | int nbr = ret / sizeof(struct otp_info); |
| 707 | ret = copy_to_user(argp, &nbr, sizeof(int)); |
| 708 | } else |
| 709 | ret = copy_to_user(argp, buf, ret); |
| 710 | if (ret) |
| 711 | ret = -EFAULT; |
| 712 | } |
| 713 | kfree(buf); |
| 714 | break; |
| 715 | } |
| 716 | |
| 717 | case OTPLOCK: |
| 718 | { |
Harvey Harrison | 175428b | 2008-07-03 23:40:14 -0700 | [diff] [blame] | 719 | struct otp_info oinfo; |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 720 | |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 721 | if (mfi->mode != MTD_MODE_OTP_USER) |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 722 | return -EINVAL; |
Harvey Harrison | 175428b | 2008-07-03 23:40:14 -0700 | [diff] [blame] | 723 | if (copy_from_user(&oinfo, argp, sizeof(oinfo))) |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 724 | return -EFAULT; |
| 725 | if (!mtd->lock_user_prot_reg) |
| 726 | return -EOPNOTSUPP; |
Harvey Harrison | 175428b | 2008-07-03 23:40:14 -0700 | [diff] [blame] | 727 | ret = mtd->lock_user_prot_reg(mtd, oinfo.start, oinfo.length); |
Nicolas Pitre | 31f4233 | 2005-02-08 17:45:55 +0000 | [diff] [blame] | 728 | break; |
| 729 | } |
| 730 | #endif |
| 731 | |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 732 | case ECCGETLAYOUT: |
| 733 | { |
| 734 | if (!mtd->ecclayout) |
| 735 | return -EOPNOTSUPP; |
| 736 | |
Ricard Wanderlöf | d25ade7 | 2006-10-17 17:27:11 +0200 | [diff] [blame] | 737 | if (copy_to_user(argp, mtd->ecclayout, |
Thomas Gleixner | f1a28c0 | 2006-05-30 00:37:34 +0200 | [diff] [blame] | 738 | sizeof(struct nand_ecclayout))) |
| 739 | return -EFAULT; |
| 740 | break; |
| 741 | } |
| 742 | |
| 743 | case ECCGETSTATS: |
| 744 | { |
| 745 | if (copy_to_user(argp, &mtd->ecc_stats, |
| 746 | sizeof(struct mtd_ecc_stats))) |
| 747 | return -EFAULT; |
| 748 | break; |
| 749 | } |
| 750 | |
| 751 | case MTDFILEMODE: |
| 752 | { |
| 753 | mfi->mode = 0; |
| 754 | |
| 755 | switch(arg) { |
| 756 | case MTD_MODE_OTP_FACTORY: |
| 757 | case MTD_MODE_OTP_USER: |
| 758 | ret = otp_select_filemode(mfi, arg); |
| 759 | break; |
| 760 | |
| 761 | case MTD_MODE_RAW: |
| 762 | if (!mtd->read_oob || !mtd->write_oob) |
| 763 | return -EOPNOTSUPP; |
| 764 | mfi->mode = arg; |
| 765 | |
| 766 | case MTD_MODE_NORMAL: |
| 767 | break; |
| 768 | default: |
| 769 | ret = -EINVAL; |
| 770 | } |
| 771 | file->f_pos = 0; |
| 772 | break; |
| 773 | } |
| 774 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | default: |
| 776 | ret = -ENOTTY; |
| 777 | } |
| 778 | |
| 779 | return ret; |
| 780 | } /* memory_ioctl */ |
| 781 | |
Arjan van de Ven | d54b1fd | 2007-02-12 00:55:34 -0800 | [diff] [blame] | 782 | static const struct file_operations mtd_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | .owner = THIS_MODULE, |
| 784 | .llseek = mtd_lseek, |
| 785 | .read = mtd_read, |
| 786 | .write = mtd_write, |
| 787 | .ioctl = mtd_ioctl, |
| 788 | .open = mtd_open, |
| 789 | .release = mtd_close, |
| 790 | }; |
| 791 | |
| 792 | static int __init init_mtdchar(void) |
| 793 | { |
| 794 | if (register_chrdev(MTD_CHAR_MAJOR, "mtd", &mtd_fops)) { |
| 795 | printk(KERN_NOTICE "Can't allocate major number %d for Memory Technology Devices.\n", |
| 796 | MTD_CHAR_MAJOR); |
| 797 | return -EAGAIN; |
| 798 | } |
| 799 | |
Todd Poynor | 9bc7b38 | 2005-06-30 01:23:27 +0100 | [diff] [blame] | 800 | mtd_class = class_create(THIS_MODULE, "mtd"); |
| 801 | |
| 802 | if (IS_ERR(mtd_class)) { |
| 803 | printk(KERN_ERR "Error creating mtd class.\n"); |
| 804 | unregister_chrdev(MTD_CHAR_MAJOR, "mtd"); |
Coywolf Qi Hunt | 3a7a882 | 2005-07-04 12:15:28 -0500 | [diff] [blame] | 805 | return PTR_ERR(mtd_class); |
Todd Poynor | 9bc7b38 | 2005-06-30 01:23:27 +0100 | [diff] [blame] | 806 | } |
| 807 | |
| 808 | register_mtd_user(¬ifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | return 0; |
| 810 | } |
| 811 | |
| 812 | static void __exit cleanup_mtdchar(void) |
| 813 | { |
Todd Poynor | 9bc7b38 | 2005-06-30 01:23:27 +0100 | [diff] [blame] | 814 | unregister_mtd_user(¬ifier); |
| 815 | class_destroy(mtd_class); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | unregister_chrdev(MTD_CHAR_MAJOR, "mtd"); |
| 817 | } |
| 818 | |
| 819 | module_init(init_mtdchar); |
| 820 | module_exit(cleanup_mtdchar); |
| 821 | |
| 822 | |
| 823 | MODULE_LICENSE("GPL"); |
| 824 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); |
| 825 | MODULE_DESCRIPTION("Direct character-device access to MTD devices"); |