Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | |
| 2 | /* Linux driver for Disk-On-Chip devices */ |
| 3 | /* Probe routines common to all DoC devices */ |
| 4 | /* (C) 1999 Machine Vision Holdings, Inc. */ |
| 5 | /* (C) 1999-2003 David Woodhouse <dwmw2@infradead.org> */ |
| 6 | |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 7 | /* $Id: docprobe.c,v 1.46 2005/11/07 11:14:25 gleixner Exp $ */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | |
| 9 | |
| 10 | |
| 11 | /* DOC_PASSIVE_PROBE: |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 12 | In order to ensure that the BIOS checksum is correct at boot time, and |
| 13 | hence that the onboard BIOS extension gets executed, the DiskOnChip |
| 14 | goes into reset mode when it is read sequentially: all registers |
| 15 | return 0xff until the chip is woken up again by writing to the |
| 16 | DOCControl register. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 18 | Unfortunately, this means that the probe for the DiskOnChip is unsafe, |
| 19 | because one of the first things it does is write to where it thinks |
| 20 | the DOCControl register should be - which may well be shared memory |
| 21 | for another device. I've had machines which lock up when this is |
| 22 | attempted. Hence the possibility to do a passive probe, which will fail |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | to detect a chip in reset mode, but is at least guaranteed not to lock |
| 24 | the machine. |
| 25 | |
| 26 | If you have this problem, uncomment the following line: |
| 27 | #define DOC_PASSIVE_PROBE |
| 28 | */ |
| 29 | |
| 30 | |
| 31 | /* DOC_SINGLE_DRIVER: |
| 32 | Millennium driver has been merged into DOC2000 driver. |
| 33 | |
| 34 | The old Millennium-only driver has been retained just in case there |
| 35 | are problems with the new code. If the combined driver doesn't work |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 36 | for you, you can try the old one by undefining DOC_SINGLE_DRIVER |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | below and also enabling it in your configuration. If this fixes the |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 38 | problems, please send a report to the MTD mailing list at |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | <linux-mtd@lists.infradead.org>. |
| 40 | */ |
| 41 | #define DOC_SINGLE_DRIVER |
| 42 | |
| 43 | #include <linux/config.h> |
| 44 | #include <linux/kernel.h> |
| 45 | #include <linux/module.h> |
| 46 | #include <asm/errno.h> |
| 47 | #include <asm/io.h> |
| 48 | #include <linux/delay.h> |
| 49 | #include <linux/slab.h> |
| 50 | #include <linux/init.h> |
| 51 | #include <linux/types.h> |
| 52 | |
| 53 | #include <linux/mtd/mtd.h> |
| 54 | #include <linux/mtd/nand.h> |
| 55 | #include <linux/mtd/doc2000.h> |
| 56 | #include <linux/mtd/compatmac.h> |
| 57 | |
| 58 | /* Where to look for the devices? */ |
| 59 | #ifndef CONFIG_MTD_DOCPROBE_ADDRESS |
| 60 | #define CONFIG_MTD_DOCPROBE_ADDRESS 0 |
| 61 | #endif |
| 62 | |
| 63 | |
| 64 | static unsigned long doc_config_location = CONFIG_MTD_DOCPROBE_ADDRESS; |
| 65 | module_param(doc_config_location, ulong, 0); |
| 66 | MODULE_PARM_DESC(doc_config_location, "Physical memory address at which to probe for DiskOnChip"); |
| 67 | |
| 68 | static unsigned long __initdata doc_locations[] = { |
| 69 | #if defined (__alpha__) || defined(__i386__) || defined(__x86_64__) |
| 70 | #ifdef CONFIG_MTD_DOCPROBE_HIGH |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 71 | 0xfffc8000, 0xfffca000, 0xfffcc000, 0xfffce000, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | 0xfffd0000, 0xfffd2000, 0xfffd4000, 0xfffd6000, |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 73 | 0xfffd8000, 0xfffda000, 0xfffdc000, 0xfffde000, |
| 74 | 0xfffe0000, 0xfffe2000, 0xfffe4000, 0xfffe6000, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | 0xfffe8000, 0xfffea000, 0xfffec000, 0xfffee000, |
| 76 | #else /* CONFIG_MTD_DOCPROBE_HIGH */ |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 77 | 0xc8000, 0xca000, 0xcc000, 0xce000, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | 0xd0000, 0xd2000, 0xd4000, 0xd6000, |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 79 | 0xd8000, 0xda000, 0xdc000, 0xde000, |
| 80 | 0xe0000, 0xe2000, 0xe4000, 0xe6000, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | 0xe8000, 0xea000, 0xec000, 0xee000, |
| 82 | #endif /* CONFIG_MTD_DOCPROBE_HIGH */ |
| 83 | #elif defined(__PPC__) |
| 84 | 0xe4000000, |
| 85 | #elif defined(CONFIG_MOMENCO_OCELOT) |
| 86 | 0x2f000000, |
| 87 | 0xff000000, |
| 88 | #elif defined(CONFIG_MOMENCO_OCELOT_G) || defined (CONFIG_MOMENCO_OCELOT_C) |
| 89 | 0xff000000, |
| 90 | ##else |
| 91 | #warning Unknown architecture for DiskOnChip. No default probe locations defined |
| 92 | #endif |
| 93 | 0xffffffff }; |
| 94 | |
| 95 | /* doccheck: Probe a given memory window to see if there's a DiskOnChip present */ |
| 96 | |
| 97 | static inline int __init doccheck(void __iomem *potential, unsigned long physadr) |
| 98 | { |
| 99 | void __iomem *window=potential; |
| 100 | unsigned char tmp, tmpb, tmpc, ChipID; |
| 101 | #ifndef DOC_PASSIVE_PROBE |
| 102 | unsigned char tmp2; |
| 103 | #endif |
| 104 | |
| 105 | /* Routine copied from the Linux DOC driver */ |
| 106 | |
| 107 | #ifdef CONFIG_MTD_DOCPROBE_55AA |
| 108 | /* Check for 0x55 0xAA signature at beginning of window, |
| 109 | this is no longer true once we remove the IPL (for Millennium */ |
| 110 | if (ReadDOC(window, Sig1) != 0x55 || ReadDOC(window, Sig2) != 0xaa) |
| 111 | return 0; |
| 112 | #endif /* CONFIG_MTD_DOCPROBE_55AA */ |
| 113 | |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 114 | #ifndef DOC_PASSIVE_PROBE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | /* It's not possible to cleanly detect the DiskOnChip - the |
| 116 | * bootup procedure will put the device into reset mode, and |
| 117 | * it's not possible to talk to it without actually writing |
| 118 | * to the DOCControl register. So we store the current contents |
| 119 | * of the DOCControl register's location, in case we later decide |
| 120 | * that it's not a DiskOnChip, and want to put it back how we |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 121 | * found it. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | */ |
| 123 | tmp2 = ReadDOC(window, DOCControl); |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 124 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | /* Reset the DiskOnChip ASIC */ |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 126 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | window, DOCControl); |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 128 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | window, DOCControl); |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 130 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | /* Enable the DiskOnChip ASIC */ |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 132 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | window, DOCControl); |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 134 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | window, DOCControl); |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 136 | #endif /* !DOC_PASSIVE_PROBE */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | |
| 138 | /* We need to read the ChipID register four times. For some |
| 139 | newer DiskOnChip 2000 units, the first three reads will |
| 140 | return the DiskOnChip Millennium ident. Don't ask. */ |
| 141 | ChipID = ReadDOC(window, ChipID); |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 142 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | switch (ChipID) { |
| 144 | case DOC_ChipID_Doc2k: |
| 145 | /* Check the TOGGLE bit in the ECC register */ |
| 146 | tmp = ReadDOC(window, 2k_ECCStatus) & DOC_TOGGLE_BIT; |
| 147 | tmpb = ReadDOC(window, 2k_ECCStatus) & DOC_TOGGLE_BIT; |
| 148 | tmpc = ReadDOC(window, 2k_ECCStatus) & DOC_TOGGLE_BIT; |
| 149 | if (tmp != tmpb && tmp == tmpc) |
| 150 | return ChipID; |
| 151 | break; |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 152 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | case DOC_ChipID_DocMil: |
| 154 | /* Check for the new 2000 with Millennium ASIC */ |
| 155 | ReadDOC(window, ChipID); |
| 156 | ReadDOC(window, ChipID); |
| 157 | if (ReadDOC(window, ChipID) != DOC_ChipID_DocMil) |
| 158 | ChipID = DOC_ChipID_Doc2kTSOP; |
| 159 | |
| 160 | /* Check the TOGGLE bit in the ECC register */ |
| 161 | tmp = ReadDOC(window, ECCConf) & DOC_TOGGLE_BIT; |
| 162 | tmpb = ReadDOC(window, ECCConf) & DOC_TOGGLE_BIT; |
| 163 | tmpc = ReadDOC(window, ECCConf) & DOC_TOGGLE_BIT; |
| 164 | if (tmp != tmpb && tmp == tmpc) |
| 165 | return ChipID; |
| 166 | break; |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 167 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | case DOC_ChipID_DocMilPlus16: |
| 169 | case DOC_ChipID_DocMilPlus32: |
| 170 | case 0: |
| 171 | /* Possible Millennium+, need to do more checks */ |
| 172 | #ifndef DOC_PASSIVE_PROBE |
| 173 | /* Possibly release from power down mode */ |
| 174 | for (tmp = 0; (tmp < 4); tmp++) |
| 175 | ReadDOC(window, Mplus_Power); |
| 176 | |
| 177 | /* Reset the DiskOnChip ASIC */ |
| 178 | tmp = DOC_MODE_RESET | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | |
| 179 | DOC_MODE_BDECT; |
| 180 | WriteDOC(tmp, window, Mplus_DOCControl); |
| 181 | WriteDOC(~tmp, window, Mplus_CtrlConfirm); |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 182 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | mdelay(1); |
| 184 | /* Enable the DiskOnChip ASIC */ |
| 185 | tmp = DOC_MODE_NORMAL | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | |
| 186 | DOC_MODE_BDECT; |
| 187 | WriteDOC(tmp, window, Mplus_DOCControl); |
| 188 | WriteDOC(~tmp, window, Mplus_CtrlConfirm); |
| 189 | mdelay(1); |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 190 | #endif /* !DOC_PASSIVE_PROBE */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | |
| 192 | ChipID = ReadDOC(window, ChipID); |
| 193 | |
| 194 | switch (ChipID) { |
| 195 | case DOC_ChipID_DocMilPlus16: |
| 196 | case DOC_ChipID_DocMilPlus32: |
| 197 | /* Check the TOGGLE bit in the toggle register */ |
| 198 | tmp = ReadDOC(window, Mplus_Toggle) & DOC_TOGGLE_BIT; |
| 199 | tmpb = ReadDOC(window, Mplus_Toggle) & DOC_TOGGLE_BIT; |
| 200 | tmpc = ReadDOC(window, Mplus_Toggle) & DOC_TOGGLE_BIT; |
| 201 | if (tmp != tmpb && tmp == tmpc) |
| 202 | return ChipID; |
| 203 | default: |
| 204 | break; |
| 205 | } |
| 206 | /* FALL TRHU */ |
| 207 | |
| 208 | default: |
| 209 | |
| 210 | #ifdef CONFIG_MTD_DOCPROBE_55AA |
| 211 | printk(KERN_DEBUG "Possible DiskOnChip with unknown ChipID %2.2X found at 0x%lx\n", |
| 212 | ChipID, physadr); |
| 213 | #endif |
| 214 | #ifndef DOC_PASSIVE_PROBE |
| 215 | /* Put back the contents of the DOCControl register, in case it's not |
| 216 | * actually a DiskOnChip. |
| 217 | */ |
| 218 | WriteDOC(tmp2, window, DOCControl); |
| 219 | #endif |
| 220 | return 0; |
| 221 | } |
| 222 | |
| 223 | printk(KERN_WARNING "DiskOnChip failed TOGGLE test, dropping.\n"); |
| 224 | |
| 225 | #ifndef DOC_PASSIVE_PROBE |
| 226 | /* Put back the contents of the DOCControl register: it's not a DiskOnChip */ |
| 227 | WriteDOC(tmp2, window, DOCControl); |
| 228 | #endif |
| 229 | return 0; |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 230 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | |
| 232 | static int docfound; |
| 233 | |
David Woodhouse | 396674e | 2006-05-08 17:10:11 +0100 | [diff] [blame] | 234 | extern void DoC2k_init(struct mtd_info *); |
David Woodhouse | 396674e | 2006-05-08 17:10:11 +0100 | [diff] [blame] | 235 | extern void DoCMil_init(struct mtd_info *); |
David Woodhouse | 396674e | 2006-05-08 17:10:11 +0100 | [diff] [blame] | 236 | extern void DoCMilPlus_init(struct mtd_info *); |
David Woodhouse | 396674e | 2006-05-08 17:10:11 +0100 | [diff] [blame] | 237 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | static void __init DoC_Probe(unsigned long physadr) |
| 239 | { |
| 240 | void __iomem *docptr; |
| 241 | struct DiskOnChip *this; |
| 242 | struct mtd_info *mtd; |
| 243 | int ChipID; |
| 244 | char namebuf[15]; |
| 245 | char *name = namebuf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | void (*initroutine)(struct mtd_info *) = NULL; |
| 247 | |
| 248 | docptr = ioremap(physadr, DOC_IOREMAP_LEN); |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 249 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | if (!docptr) |
| 251 | return; |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 252 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | if ((ChipID = doccheck(docptr, physadr))) { |
| 254 | if (ChipID == DOC_ChipID_Doc2kTSOP) { |
| 255 | /* Remove this at your own peril. The hardware driver works but nothing prevents you from erasing bad blocks */ |
| 256 | printk(KERN_NOTICE "Refusing to drive DiskOnChip 2000 TSOP until Bad Block Table is correctly supported by INFTL\n"); |
| 257 | iounmap(docptr); |
| 258 | return; |
| 259 | } |
| 260 | docfound = 1; |
| 261 | mtd = kmalloc(sizeof(struct DiskOnChip) + sizeof(struct mtd_info), GFP_KERNEL); |
| 262 | |
| 263 | if (!mtd) { |
| 264 | printk(KERN_WARNING "Cannot allocate memory for data structures. Dropping.\n"); |
| 265 | iounmap(docptr); |
| 266 | return; |
| 267 | } |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 268 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | this = (struct DiskOnChip *)(&mtd[1]); |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 270 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | memset((char *)mtd,0, sizeof(struct mtd_info)); |
| 272 | memset((char *)this, 0, sizeof(struct DiskOnChip)); |
| 273 | |
| 274 | mtd->priv = this; |
| 275 | this->virtadr = docptr; |
| 276 | this->physadr = physadr; |
| 277 | this->ChipID = ChipID; |
| 278 | sprintf(namebuf, "with ChipID %2.2X", ChipID); |
| 279 | |
| 280 | switch(ChipID) { |
| 281 | case DOC_ChipID_Doc2kTSOP: |
| 282 | name="2000 TSOP"; |
David Woodhouse | ecde263 | 2006-05-21 18:38:51 +0100 | [diff] [blame] | 283 | initroutine = symbol_request(DoC2k_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | break; |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 285 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | case DOC_ChipID_Doc2k: |
| 287 | name="2000"; |
David Woodhouse | ecde263 | 2006-05-21 18:38:51 +0100 | [diff] [blame] | 288 | initroutine = symbol_request(DoC2k_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | break; |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 290 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | case DOC_ChipID_DocMil: |
| 292 | name="Millennium"; |
| 293 | #ifdef DOC_SINGLE_DRIVER |
David Woodhouse | ecde263 | 2006-05-21 18:38:51 +0100 | [diff] [blame] | 294 | initroutine = symbol_request(DoC2k_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | #else |
David Woodhouse | ecde263 | 2006-05-21 18:38:51 +0100 | [diff] [blame] | 296 | initroutine = symbol_request(DoCMil_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | #endif /* DOC_SINGLE_DRIVER */ |
| 298 | break; |
| 299 | |
| 300 | case DOC_ChipID_DocMilPlus16: |
| 301 | case DOC_ChipID_DocMilPlus32: |
| 302 | name="MillenniumPlus"; |
David Woodhouse | ecde263 | 2006-05-21 18:38:51 +0100 | [diff] [blame] | 303 | initroutine = symbol_request(DoCMilPlus_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | break; |
| 305 | } |
| 306 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | if (initroutine) { |
| 308 | (*initroutine)(mtd); |
David Woodhouse | 5e53542 | 2006-05-08 14:05:05 +0100 | [diff] [blame] | 309 | symbol_put_addr(initroutine); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | return; |
| 311 | } |
| 312 | printk(KERN_NOTICE "Cannot find driver for DiskOnChip %s at 0x%lX\n", name, physadr); |
| 313 | kfree(mtd); |
| 314 | } |
| 315 | iounmap(docptr); |
| 316 | } |
| 317 | |
| 318 | |
| 319 | /**************************************************************************** |
| 320 | * |
| 321 | * Module stuff |
| 322 | * |
| 323 | ****************************************************************************/ |
| 324 | |
| 325 | static int __init init_doc(void) |
| 326 | { |
| 327 | int i; |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 328 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | if (doc_config_location) { |
| 330 | printk(KERN_INFO "Using configured DiskOnChip probe address 0x%lx\n", doc_config_location); |
| 331 | DoC_Probe(doc_config_location); |
| 332 | } else { |
| 333 | for (i=0; (doc_locations[i] != 0xffffffff); i++) { |
| 334 | DoC_Probe(doc_locations[i]); |
| 335 | } |
| 336 | } |
| 337 | /* No banner message any more. Print a message if no DiskOnChip |
| 338 | found, so the user knows we at least tried. */ |
| 339 | if (!docfound) |
| 340 | printk(KERN_INFO "No recognised DiskOnChip devices found\n"); |
| 341 | return -EAGAIN; |
| 342 | } |
| 343 | |
| 344 | module_init(init_doc); |
| 345 | |
| 346 | MODULE_LICENSE("GPL"); |
| 347 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); |
| 348 | MODULE_DESCRIPTION("Probe code for DiskOnChip 2000 and Millennium devices"); |
| 349 | |