X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=drivers%2Fmtd%2Fdevices%2Fdocprobe.c;h=78872c3f3760d63f191deed477a7307bb5d4c505;hb=refs%2Fheads%2Fvserver;hp=cb8b8a51ec0756834d676c4f74857e2f70f71dda;hpb=9bf4aaab3e101692164d49b7ca357651eb691cb6;p=linux-2.6.git diff --git a/drivers/mtd/devices/docprobe.c b/drivers/mtd/devices/docprobe.c index cb8b8a51e..78872c3f3 100644 --- a/drivers/mtd/devices/docprobe.c +++ b/drivers/mtd/devices/docprobe.c @@ -4,22 +4,22 @@ /* (C) 1999 Machine Vision Holdings, Inc. */ /* (C) 1999-2003 David Woodhouse */ -/* $Id: docprobe.c,v 1.41 2003/12/03 10:19:57 dwmw2 Exp $ */ +/* $Id: docprobe.c,v 1.46 2005/11/07 11:14:25 gleixner Exp $ */ /* DOC_PASSIVE_PROBE: - In order to ensure that the BIOS checksum is correct at boot time, and - hence that the onboard BIOS extension gets executed, the DiskOnChip - goes into reset mode when it is read sequentially: all registers - return 0xff until the chip is woken up again by writing to the - DOCControl register. - - Unfortunately, this means that the probe for the DiskOnChip is unsafe, - because one of the first things it does is write to where it thinks - the DOCControl register should be - which may well be shared memory - for another device. I've had machines which lock up when this is - attempted. Hence the possibility to do a passive probe, which will fail + In order to ensure that the BIOS checksum is correct at boot time, and + hence that the onboard BIOS extension gets executed, the DiskOnChip + goes into reset mode when it is read sequentially: all registers + return 0xff until the chip is woken up again by writing to the + DOCControl register. + + Unfortunately, this means that the probe for the DiskOnChip is unsafe, + because one of the first things it does is write to where it thinks + the DOCControl register should be - which may well be shared memory + for another device. I've had machines which lock up when this is + attempted. Hence the possibility to do a passive probe, which will fail to detect a chip in reset mode, but is at least guaranteed not to lock the machine. @@ -33,14 +33,13 @@ The old Millennium-only driver has been retained just in case there are problems with the new code. If the combined driver doesn't work - for you, you can try the old one by undefining DOC_SINGLE_DRIVER + for you, you can try the old one by undefining DOC_SINGLE_DRIVER below and also enabling it in your configuration. If this fixes the - problems, please send a report to the MTD mailing list at + problems, please send a report to the MTD mailing list at . */ #define DOC_SINGLE_DRIVER -#include #include #include #include @@ -62,22 +61,22 @@ static unsigned long doc_config_location = CONFIG_MTD_DOCPROBE_ADDRESS; -MODULE_PARM(doc_config_location, "l"); +module_param(doc_config_location, ulong, 0); MODULE_PARM_DESC(doc_config_location, "Physical memory address at which to probe for DiskOnChip"); static unsigned long __initdata doc_locations[] = { #if defined (__alpha__) || defined(__i386__) || defined(__x86_64__) #ifdef CONFIG_MTD_DOCPROBE_HIGH - 0xfffc8000, 0xfffca000, 0xfffcc000, 0xfffce000, + 0xfffc8000, 0xfffca000, 0xfffcc000, 0xfffce000, 0xfffd0000, 0xfffd2000, 0xfffd4000, 0xfffd6000, - 0xfffd8000, 0xfffda000, 0xfffdc000, 0xfffde000, - 0xfffe0000, 0xfffe2000, 0xfffe4000, 0xfffe6000, + 0xfffd8000, 0xfffda000, 0xfffdc000, 0xfffde000, + 0xfffe0000, 0xfffe2000, 0xfffe4000, 0xfffe6000, 0xfffe8000, 0xfffea000, 0xfffec000, 0xfffee000, #else /* CONFIG_MTD_DOCPROBE_HIGH */ - 0xc8000, 0xca000, 0xcc000, 0xce000, + 0xc8000, 0xca000, 0xcc000, 0xce000, 0xd0000, 0xd2000, 0xd4000, 0xd6000, - 0xd8000, 0xda000, 0xdc000, 0xde000, - 0xe0000, 0xe2000, 0xe4000, 0xe6000, + 0xd8000, 0xda000, 0xdc000, 0xde000, + 0xe0000, 0xe2000, 0xe4000, 0xe6000, 0xe8000, 0xea000, 0xec000, 0xee000, #endif /* CONFIG_MTD_DOCPROBE_HIGH */ #elif defined(__PPC__) @@ -94,9 +93,9 @@ static unsigned long __initdata doc_locations[] = { /* doccheck: Probe a given memory window to see if there's a DiskOnChip present */ -static inline int __init doccheck(unsigned long potential, unsigned long physadr) +static inline int __init doccheck(void __iomem *potential, unsigned long physadr) { - unsigned long window=potential; + void __iomem *window=potential; unsigned char tmp, tmpb, tmpc, ChipID; #ifndef DOC_PASSIVE_PROBE unsigned char tmp2; @@ -111,35 +110,35 @@ static inline int __init doccheck(unsigned long potential, unsigned long physadr return 0; #endif /* CONFIG_MTD_DOCPROBE_55AA */ -#ifndef DOC_PASSIVE_PROBE +#ifndef DOC_PASSIVE_PROBE /* It's not possible to cleanly detect the DiskOnChip - the * bootup procedure will put the device into reset mode, and * it's not possible to talk to it without actually writing * to the DOCControl register. So we store the current contents * of the DOCControl register's location, in case we later decide * that it's not a DiskOnChip, and want to put it back how we - * found it. + * found it. */ tmp2 = ReadDOC(window, DOCControl); - + /* Reset the DiskOnChip ASIC */ - WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, + WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, window, DOCControl); - WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, + WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET, window, DOCControl); - + /* Enable the DiskOnChip ASIC */ - WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, + WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, window, DOCControl); - WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, + WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL, window, DOCControl); -#endif /* !DOC_PASSIVE_PROBE */ +#endif /* !DOC_PASSIVE_PROBE */ /* We need to read the ChipID register four times. For some newer DiskOnChip 2000 units, the first three reads will return the DiskOnChip Millennium ident. Don't ask. */ ChipID = ReadDOC(window, ChipID); - + switch (ChipID) { case DOC_ChipID_Doc2k: /* Check the TOGGLE bit in the ECC register */ @@ -149,7 +148,7 @@ static inline int __init doccheck(unsigned long potential, unsigned long physadr if (tmp != tmpb && tmp == tmpc) return ChipID; break; - + case DOC_ChipID_DocMil: /* Check for the new 2000 with Millennium ASIC */ ReadDOC(window, ChipID); @@ -164,7 +163,7 @@ static inline int __init doccheck(unsigned long potential, unsigned long physadr if (tmp != tmpb && tmp == tmpc) return ChipID; break; - + case DOC_ChipID_DocMilPlus16: case DOC_ChipID_DocMilPlus32: case 0: @@ -179,7 +178,7 @@ static inline int __init doccheck(unsigned long potential, unsigned long physadr DOC_MODE_BDECT; WriteDOC(tmp, window, Mplus_DOCControl); WriteDOC(~tmp, window, Mplus_CtrlConfirm); - + mdelay(1); /* Enable the DiskOnChip ASIC */ tmp = DOC_MODE_NORMAL | DOC_MODE_MDWREN | DOC_MODE_RST_LAT | @@ -187,7 +186,7 @@ static inline int __init doccheck(unsigned long potential, unsigned long physadr WriteDOC(tmp, window, Mplus_DOCControl); WriteDOC(~tmp, window, Mplus_CtrlConfirm); mdelay(1); -#endif /* !DOC_PASSIVE_PROBE */ +#endif /* !DOC_PASSIVE_PROBE */ ChipID = ReadDOC(window, ChipID); @@ -227,32 +226,34 @@ static inline int __init doccheck(unsigned long potential, unsigned long physadr WriteDOC(tmp2, window, DOCControl); #endif return 0; -} +} static int docfound; +extern void DoC2k_init(struct mtd_info *); +extern void DoCMil_init(struct mtd_info *); +extern void DoCMilPlus_init(struct mtd_info *); + static void __init DoC_Probe(unsigned long physadr) { - unsigned long docptr; + void __iomem *docptr; struct DiskOnChip *this; struct mtd_info *mtd; int ChipID; char namebuf[15]; char *name = namebuf; - char *im_funcname = NULL; - char *im_modname = NULL; void (*initroutine)(struct mtd_info *) = NULL; - docptr = (unsigned long)ioremap(physadr, DOC_IOREMAP_LEN); - + docptr = ioremap(physadr, DOC_IOREMAP_LEN); + if (!docptr) return; - + if ((ChipID = doccheck(docptr, physadr))) { if (ChipID == DOC_ChipID_Doc2kTSOP) { /* Remove this at your own peril. The hardware driver works but nothing prevents you from erasing bad blocks */ printk(KERN_NOTICE "Refusing to drive DiskOnChip 2000 TSOP until Bad Block Table is correctly supported by INFTL\n"); - iounmap((void *)docptr); + iounmap(docptr); return; } docfound = 1; @@ -260,12 +261,12 @@ static void __init DoC_Probe(unsigned long physadr) if (!mtd) { printk(KERN_WARNING "Cannot allocate memory for data structures. Dropping.\n"); - iounmap((void *)docptr); + iounmap(docptr); return; } - + this = (struct DiskOnChip *)(&mtd[1]); - + memset((char *)mtd,0, sizeof(struct mtd_info)); memset((char *)this, 0, sizeof(struct DiskOnChip)); @@ -278,47 +279,39 @@ static void __init DoC_Probe(unsigned long physadr) switch(ChipID) { case DOC_ChipID_Doc2kTSOP: name="2000 TSOP"; - im_funcname = "DoC2k_init"; - im_modname = "doc2000"; + initroutine = symbol_request(DoC2k_init); break; - + case DOC_ChipID_Doc2k: name="2000"; - im_funcname = "DoC2k_init"; - im_modname = "doc2000"; + initroutine = symbol_request(DoC2k_init); break; - + case DOC_ChipID_DocMil: name="Millennium"; #ifdef DOC_SINGLE_DRIVER - im_funcname = "DoC2k_init"; - im_modname = "doc2000"; + initroutine = symbol_request(DoC2k_init); #else - im_funcname = "DoCMil_init"; - im_modname = "doc2001"; + initroutine = symbol_request(DoCMil_init); #endif /* DOC_SINGLE_DRIVER */ break; case DOC_ChipID_DocMilPlus16: case DOC_ChipID_DocMilPlus32: name="MillenniumPlus"; - im_funcname = "DoCMilPlus_init"; - im_modname = "doc2001plus"; + initroutine = symbol_request(DoCMilPlus_init); break; } - if (im_funcname) - initroutine = inter_module_get_request(im_funcname, im_modname); - if (initroutine) { (*initroutine)(mtd); - inter_module_put(im_funcname); + symbol_put_addr(initroutine); return; } printk(KERN_NOTICE "Cannot find driver for DiskOnChip %s at 0x%lX\n", name, physadr); kfree(mtd); } - iounmap((void *)docptr); + iounmap(docptr); } @@ -328,10 +321,10 @@ static void __init DoC_Probe(unsigned long physadr) * ****************************************************************************/ -int __init init_doc(void) +static int __init init_doc(void) { int i; - + if (doc_config_location) { printk(KERN_INFO "Using configured DiskOnChip probe address 0x%lx\n", doc_config_location); DoC_Probe(doc_config_location);