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 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | |
| 8 | /* DOC_PASSIVE_PROBE: |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 9 | In order to ensure that the BIOS checksum is correct at boot time, and |
| 10 | hence that the onboard BIOS extension gets executed, the DiskOnChip |
| 11 | goes into reset mode when it is read sequentially: all registers |
| 12 | return 0xff until the chip is woken up again by writing to the |
| 13 | DOCControl register. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 14 | |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 15 | Unfortunately, this means that the probe for the DiskOnChip is unsafe, |
| 16 | because one of the first things it does is write to where it thinks |
| 17 | the DOCControl register should be - which may well be shared memory |
| 18 | for another device. I've had machines which lock up when this is |
| 19 | attempted. Hence the possibility to do a passive probe, which will fail |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | to detect a chip in reset mode, but is at least guaranteed not to lock |
| 21 | the machine. |
| 22 | |
| 23 | If you have this problem, uncomment the following line: |
| 24 | #define DOC_PASSIVE_PROBE |
| 25 | */ |
| 26 | |
| 27 | |
| 28 | /* DOC_SINGLE_DRIVER: |
| 29 | Millennium driver has been merged into DOC2000 driver. |
| 30 | |
| 31 | The old Millennium-only driver has been retained just in case there |
| 32 | 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] | 33 | 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] | 34 | below and also enabling it in your configuration. If this fixes the |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 35 | problems, please send a report to the MTD mailing list at |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | <linux-mtd@lists.infradead.org>. |
| 37 | */ |
| 38 | #define DOC_SINGLE_DRIVER |
| 39 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include <linux/kernel.h> |
| 41 | #include <linux/module.h> |
| 42 | #include <asm/errno.h> |
| 43 | #include <asm/io.h> |
| 44 | #include <linux/delay.h> |
| 45 | #include <linux/slab.h> |
| 46 | #include <linux/init.h> |
| 47 | #include <linux/types.h> |
| 48 | |
| 49 | #include <linux/mtd/mtd.h> |
| 50 | #include <linux/mtd/nand.h> |
| 51 | #include <linux/mtd/doc2000.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | |
| 53 | /* Where to look for the devices? */ |
| 54 | #ifndef CONFIG_MTD_DOCPROBE_ADDRESS |
| 55 | #define CONFIG_MTD_DOCPROBE_ADDRESS 0 |
| 56 | #endif |
| 57 | |
| 58 | |
| 59 | static unsigned long doc_config_location = CONFIG_MTD_DOCPROBE_ADDRESS; |
| 60 | module_param(doc_config_location, ulong, 0); |
| 61 | MODULE_PARM_DESC(doc_config_location, "Physical memory address at which to probe for DiskOnChip"); |
| 62 | |
| 63 | static unsigned long __initdata doc_locations[] = { |
| 64 | #if defined (__alpha__) || defined(__i386__) || defined(__x86_64__) |
| 65 | #ifdef CONFIG_MTD_DOCPROBE_HIGH |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 66 | 0xfffc8000, 0xfffca000, 0xfffcc000, 0xfffce000, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | 0xfffd0000, 0xfffd2000, 0xfffd4000, 0xfffd6000, |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 68 | 0xfffd8000, 0xfffda000, 0xfffdc000, 0xfffde000, |
| 69 | 0xfffe0000, 0xfffe2000, 0xfffe4000, 0xfffe6000, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | 0xfffe8000, 0xfffea000, 0xfffec000, 0xfffee000, |
| 71 | #else /* CONFIG_MTD_DOCPROBE_HIGH */ |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 72 | 0xc8000, 0xca000, 0xcc000, 0xce000, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | 0xd0000, 0xd2000, 0xd4000, 0xd6000, |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 74 | 0xd8000, 0xda000, 0xdc000, 0xde000, |
| 75 | 0xe0000, 0xe2000, 0xe4000, 0xe6000, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | 0xe8000, 0xea000, 0xec000, 0xee000, |
| 77 | #endif /* CONFIG_MTD_DOCPROBE_HIGH */ |
David Woodhouse | 440fdb5 | 2007-08-01 11:23:57 +0100 | [diff] [blame] | 78 | #else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | #warning Unknown architecture for DiskOnChip. No default probe locations defined |
| 80 | #endif |
| 81 | 0xffffffff }; |
| 82 | |
| 83 | /* doccheck: Probe a given memory window to see if there's a DiskOnChip present */ |
| 84 | |
| 85 | static inline int __init doccheck(void __iomem *potential, unsigned long physadr) |
| 86 | { |
| 87 | void __iomem *window=potential; |
| 88 | unsigned char tmp, tmpb, tmpc, ChipID; |
| 89 | #ifndef DOC_PASSIVE_PROBE |
| 90 | unsigned char tmp2; |
| 91 | #endif |
| 92 | |
| 93 | /* Routine copied from the Linux DOC driver */ |
| 94 | |
| 95 | #ifdef CONFIG_MTD_DOCPROBE_55AA |
| 96 | /* Check for 0x55 0xAA signature at beginning of window, |
| 97 | this is no longer true once we remove the IPL (for Millennium */ |
| 98 | if (ReadDOC(window, Sig1) != 0x55 || ReadDOC(window, Sig2) != 0xaa) |
| 99 | return 0; |
| 100 | #endif /* CONFIG_MTD_DOCPROBE_55AA */ |
| 101 | |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 102 | #ifndef DOC_PASSIVE_PROBE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | /* It's not possible to cleanly detect the DiskOnChip - the |
| 104 | * bootup procedure will put the device into reset mode, and |
| 105 | * it's not possible to talk to it without actually writing |
| 106 | * to the DOCControl register. So we store the current contents |
| 107 | * of the DOCControl register's location, in case we later decide |
| 108 | * 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] | 109 | * found it. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | */ |
| 111 | tmp2 = ReadDOC(window, DOCControl); |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 112 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | /* Reset the DiskOnChip ASIC */ |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 114 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | window, DOCControl); |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 116 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | window, DOCControl); |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 118 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | /* Enable the DiskOnChip ASIC */ |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 120 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | window, DOCControl); |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 122 | WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | window, DOCControl); |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 124 | #endif /* !DOC_PASSIVE_PROBE */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | |
| 126 | /* We need to read the ChipID register four times. For some |
| 127 | newer DiskOnChip 2000 units, the first three reads will |
| 128 | return the DiskOnChip Millennium ident. Don't ask. */ |
| 129 | ChipID = ReadDOC(window, ChipID); |
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 | switch (ChipID) { |
| 132 | case DOC_ChipID_Doc2k: |
| 133 | /* Check the TOGGLE bit in the ECC register */ |
| 134 | tmp = ReadDOC(window, 2k_ECCStatus) & DOC_TOGGLE_BIT; |
| 135 | tmpb = ReadDOC(window, 2k_ECCStatus) & DOC_TOGGLE_BIT; |
| 136 | tmpc = ReadDOC(window, 2k_ECCStatus) & DOC_TOGGLE_BIT; |
| 137 | if (tmp != tmpb && tmp == tmpc) |
| 138 | return ChipID; |
| 139 | break; |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 140 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | case DOC_ChipID_DocMil: |
| 142 | /* Check for the new 2000 with Millennium ASIC */ |
| 143 | ReadDOC(window, ChipID); |
| 144 | ReadDOC(window, ChipID); |
| 145 | if (ReadDOC(window, ChipID) != DOC_ChipID_DocMil) |
| 146 | ChipID = DOC_ChipID_Doc2kTSOP; |
| 147 | |
| 148 | /* Check the TOGGLE bit in the ECC register */ |
| 149 | tmp = ReadDOC(window, ECCConf) & DOC_TOGGLE_BIT; |
| 150 | tmpb = ReadDOC(window, ECCConf) & DOC_TOGGLE_BIT; |
| 151 | tmpc = ReadDOC(window, ECCConf) & DOC_TOGGLE_BIT; |
| 152 | if (tmp != tmpb && tmp == tmpc) |
| 153 | return ChipID; |
| 154 | break; |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 155 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | case DOC_ChipID_DocMilPlus16: |
| 157 | case DOC_ChipID_DocMilPlus32: |
| 158 | case 0: |
| 159 | /* Possible Millennium+, need to do more checks */ |
| 160 | #ifndef DOC_PASSIVE_PROBE |
| 161 | /* Possibly release from power down mode */ |
| 162 | for (tmp = 0; (tmp < 4); tmp++) |
| 163 | ReadDOC(window, Mplus_Power); |
| 164 | |
| 165 | /* Reset the DiskOnChip ASIC */ |
| 166 | tmp = DOC_MODE_RESET | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | |
| 167 | DOC_MODE_BDECT; |
| 168 | WriteDOC(tmp, window, Mplus_DOCControl); |
| 169 | WriteDOC(~tmp, window, Mplus_CtrlConfirm); |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 170 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | mdelay(1); |
| 172 | /* Enable the DiskOnChip ASIC */ |
| 173 | tmp = DOC_MODE_NORMAL | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | |
| 174 | DOC_MODE_BDECT; |
| 175 | WriteDOC(tmp, window, Mplus_DOCControl); |
| 176 | WriteDOC(~tmp, window, Mplus_CtrlConfirm); |
| 177 | mdelay(1); |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 178 | #endif /* !DOC_PASSIVE_PROBE */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | |
| 180 | ChipID = ReadDOC(window, ChipID); |
| 181 | |
| 182 | switch (ChipID) { |
| 183 | case DOC_ChipID_DocMilPlus16: |
| 184 | case DOC_ChipID_DocMilPlus32: |
| 185 | /* Check the TOGGLE bit in the toggle register */ |
| 186 | tmp = ReadDOC(window, Mplus_Toggle) & DOC_TOGGLE_BIT; |
| 187 | tmpb = ReadDOC(window, Mplus_Toggle) & DOC_TOGGLE_BIT; |
| 188 | tmpc = ReadDOC(window, Mplus_Toggle) & DOC_TOGGLE_BIT; |
| 189 | if (tmp != tmpb && tmp == tmpc) |
| 190 | return ChipID; |
| 191 | default: |
| 192 | break; |
| 193 | } |
| 194 | /* FALL TRHU */ |
| 195 | |
| 196 | default: |
| 197 | |
| 198 | #ifdef CONFIG_MTD_DOCPROBE_55AA |
| 199 | printk(KERN_DEBUG "Possible DiskOnChip with unknown ChipID %2.2X found at 0x%lx\n", |
| 200 | ChipID, physadr); |
| 201 | #endif |
| 202 | #ifndef DOC_PASSIVE_PROBE |
| 203 | /* Put back the contents of the DOCControl register, in case it's not |
| 204 | * actually a DiskOnChip. |
| 205 | */ |
| 206 | WriteDOC(tmp2, window, DOCControl); |
| 207 | #endif |
| 208 | return 0; |
| 209 | } |
| 210 | |
| 211 | printk(KERN_WARNING "DiskOnChip failed TOGGLE test, dropping.\n"); |
| 212 | |
| 213 | #ifndef DOC_PASSIVE_PROBE |
| 214 | /* Put back the contents of the DOCControl register: it's not a DiskOnChip */ |
| 215 | WriteDOC(tmp2, window, DOCControl); |
| 216 | #endif |
| 217 | return 0; |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 218 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | |
| 220 | static int docfound; |
| 221 | |
David Woodhouse | 396674e | 2006-05-08 17:10:11 +0100 | [diff] [blame] | 222 | extern void DoC2k_init(struct mtd_info *); |
David Woodhouse | 396674e | 2006-05-08 17:10:11 +0100 | [diff] [blame] | 223 | extern void DoCMil_init(struct mtd_info *); |
David Woodhouse | 396674e | 2006-05-08 17:10:11 +0100 | [diff] [blame] | 224 | extern void DoCMilPlus_init(struct mtd_info *); |
David Woodhouse | 396674e | 2006-05-08 17:10:11 +0100 | [diff] [blame] | 225 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | static void __init DoC_Probe(unsigned long physadr) |
| 227 | { |
| 228 | void __iomem *docptr; |
| 229 | struct DiskOnChip *this; |
| 230 | struct mtd_info *mtd; |
| 231 | int ChipID; |
| 232 | char namebuf[15]; |
| 233 | char *name = namebuf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | void (*initroutine)(struct mtd_info *) = NULL; |
| 235 | |
| 236 | docptr = ioremap(physadr, DOC_IOREMAP_LEN); |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 237 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | if (!docptr) |
| 239 | return; |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 240 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | if ((ChipID = doccheck(docptr, physadr))) { |
| 242 | if (ChipID == DOC_ChipID_Doc2kTSOP) { |
| 243 | /* Remove this at your own peril. The hardware driver works but nothing prevents you from erasing bad blocks */ |
| 244 | printk(KERN_NOTICE "Refusing to drive DiskOnChip 2000 TSOP until Bad Block Table is correctly supported by INFTL\n"); |
| 245 | iounmap(docptr); |
| 246 | return; |
| 247 | } |
| 248 | docfound = 1; |
| 249 | mtd = kmalloc(sizeof(struct DiskOnChip) + sizeof(struct mtd_info), GFP_KERNEL); |
| 250 | |
| 251 | if (!mtd) { |
| 252 | printk(KERN_WARNING "Cannot allocate memory for data structures. Dropping.\n"); |
| 253 | iounmap(docptr); |
| 254 | return; |
| 255 | } |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 256 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | this = (struct DiskOnChip *)(&mtd[1]); |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 258 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | memset((char *)mtd,0, sizeof(struct mtd_info)); |
| 260 | memset((char *)this, 0, sizeof(struct DiskOnChip)); |
| 261 | |
| 262 | mtd->priv = this; |
| 263 | this->virtadr = docptr; |
| 264 | this->physadr = physadr; |
| 265 | this->ChipID = ChipID; |
| 266 | sprintf(namebuf, "with ChipID %2.2X", ChipID); |
| 267 | |
| 268 | switch(ChipID) { |
| 269 | case DOC_ChipID_Doc2kTSOP: |
| 270 | name="2000 TSOP"; |
David Woodhouse | ecde263 | 2006-05-21 18:38:51 +0100 | [diff] [blame] | 271 | initroutine = symbol_request(DoC2k_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | break; |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 273 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | case DOC_ChipID_Doc2k: |
| 275 | name="2000"; |
David Woodhouse | ecde263 | 2006-05-21 18:38:51 +0100 | [diff] [blame] | 276 | initroutine = symbol_request(DoC2k_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | break; |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 278 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | case DOC_ChipID_DocMil: |
| 280 | name="Millennium"; |
| 281 | #ifdef DOC_SINGLE_DRIVER |
David Woodhouse | ecde263 | 2006-05-21 18:38:51 +0100 | [diff] [blame] | 282 | initroutine = symbol_request(DoC2k_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | #else |
David Woodhouse | ecde263 | 2006-05-21 18:38:51 +0100 | [diff] [blame] | 284 | initroutine = symbol_request(DoCMil_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | #endif /* DOC_SINGLE_DRIVER */ |
| 286 | break; |
| 287 | |
| 288 | case DOC_ChipID_DocMilPlus16: |
| 289 | case DOC_ChipID_DocMilPlus32: |
| 290 | name="MillenniumPlus"; |
David Woodhouse | ecde263 | 2006-05-21 18:38:51 +0100 | [diff] [blame] | 291 | initroutine = symbol_request(DoCMilPlus_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | break; |
| 293 | } |
| 294 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | if (initroutine) { |
| 296 | (*initroutine)(mtd); |
David Woodhouse | 5e53542 | 2006-05-08 14:05:05 +0100 | [diff] [blame] | 297 | symbol_put_addr(initroutine); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | return; |
| 299 | } |
| 300 | printk(KERN_NOTICE "Cannot find driver for DiskOnChip %s at 0x%lX\n", name, physadr); |
| 301 | kfree(mtd); |
| 302 | } |
| 303 | iounmap(docptr); |
| 304 | } |
| 305 | |
| 306 | |
| 307 | /**************************************************************************** |
| 308 | * |
| 309 | * Module stuff |
| 310 | * |
| 311 | ****************************************************************************/ |
| 312 | |
| 313 | static int __init init_doc(void) |
| 314 | { |
| 315 | int i; |
Thomas Gleixner | e5580fb | 2005-11-07 11:15:40 +0000 | [diff] [blame] | 316 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | if (doc_config_location) { |
| 318 | printk(KERN_INFO "Using configured DiskOnChip probe address 0x%lx\n", doc_config_location); |
| 319 | DoC_Probe(doc_config_location); |
| 320 | } else { |
| 321 | for (i=0; (doc_locations[i] != 0xffffffff); i++) { |
| 322 | DoC_Probe(doc_locations[i]); |
| 323 | } |
| 324 | } |
| 325 | /* No banner message any more. Print a message if no DiskOnChip |
| 326 | found, so the user knows we at least tried. */ |
| 327 | if (!docfound) |
| 328 | printk(KERN_INFO "No recognised DiskOnChip devices found\n"); |
| 329 | return -EAGAIN; |
| 330 | } |
| 331 | |
| 332 | module_init(init_doc); |
| 333 | |
| 334 | MODULE_LICENSE("GPL"); |
| 335 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); |
| 336 | MODULE_DESCRIPTION("Probe code for DiskOnChip 2000 and Millennium devices"); |
| 337 | |