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@@ -4,22 +4,22 @@
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/* (C) 1999 Machine Vision Holdings, Inc. */
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/* (C) 1999-2003 David Woodhouse <dwmw2@infradead.org> */
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-/* $Id: docprobe.c,v 1.44 2005/01/05 12:40:36 dwmw2 Exp $ */
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+/* $Id: docprobe.c,v 1.46 2005/11/07 11:14:25 gleixner Exp $ */
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/* DOC_PASSIVE_PROBE:
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- In order to ensure that the BIOS checksum is correct at boot time, and
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- hence that the onboard BIOS extension gets executed, the DiskOnChip
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- goes into reset mode when it is read sequentially: all registers
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- return 0xff until the chip is woken up again by writing to the
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- DOCControl register.
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-
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- Unfortunately, this means that the probe for the DiskOnChip is unsafe,
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- because one of the first things it does is write to where it thinks
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- the DOCControl register should be - which may well be shared memory
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- for another device. I've had machines which lock up when this is
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- attempted. Hence the possibility to do a passive probe, which will fail
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+ In order to ensure that the BIOS checksum is correct at boot time, and
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+ hence that the onboard BIOS extension gets executed, the DiskOnChip
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+ goes into reset mode when it is read sequentially: all registers
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+ return 0xff until the chip is woken up again by writing to the
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+ DOCControl register.
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+
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+ Unfortunately, this means that the probe for the DiskOnChip is unsafe,
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+ because one of the first things it does is write to where it thinks
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+ the DOCControl register should be - which may well be shared memory
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+ for another device. I've had machines which lock up when this is
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+ attempted. Hence the possibility to do a passive probe, which will fail
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to detect a chip in reset mode, but is at least guaranteed not to lock
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the machine.
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@@ -33,9 +33,9 @@
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The old Millennium-only driver has been retained just in case there
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are problems with the new code. If the combined driver doesn't work
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- for you, you can try the old one by undefining DOC_SINGLE_DRIVER
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+ for you, you can try the old one by undefining DOC_SINGLE_DRIVER
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below and also enabling it in your configuration. If this fixes the
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- problems, please send a report to the MTD mailing list at
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+ problems, please send a report to the MTD mailing list at
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<linux-mtd@lists.infradead.org>.
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*/
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#define DOC_SINGLE_DRIVER
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@@ -68,16 +68,16 @@ MODULE_PARM_DESC(doc_config_location, "Physical memory address at which to probe
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static unsigned long __initdata doc_locations[] = {
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#if defined (__alpha__) || defined(__i386__) || defined(__x86_64__)
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#ifdef CONFIG_MTD_DOCPROBE_HIGH
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- 0xfffc8000, 0xfffca000, 0xfffcc000, 0xfffce000,
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+ 0xfffc8000, 0xfffca000, 0xfffcc000, 0xfffce000,
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0xfffd0000, 0xfffd2000, 0xfffd4000, 0xfffd6000,
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- 0xfffd8000, 0xfffda000, 0xfffdc000, 0xfffde000,
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- 0xfffe0000, 0xfffe2000, 0xfffe4000, 0xfffe6000,
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+ 0xfffd8000, 0xfffda000, 0xfffdc000, 0xfffde000,
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+ 0xfffe0000, 0xfffe2000, 0xfffe4000, 0xfffe6000,
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0xfffe8000, 0xfffea000, 0xfffec000, 0xfffee000,
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#else /* CONFIG_MTD_DOCPROBE_HIGH */
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- 0xc8000, 0xca000, 0xcc000, 0xce000,
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+ 0xc8000, 0xca000, 0xcc000, 0xce000,
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0xd0000, 0xd2000, 0xd4000, 0xd6000,
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- 0xd8000, 0xda000, 0xdc000, 0xde000,
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- 0xe0000, 0xe2000, 0xe4000, 0xe6000,
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+ 0xd8000, 0xda000, 0xdc000, 0xde000,
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+ 0xe0000, 0xe2000, 0xe4000, 0xe6000,
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0xe8000, 0xea000, 0xec000, 0xee000,
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#endif /* CONFIG_MTD_DOCPROBE_HIGH */
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#elif defined(__PPC__)
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@@ -111,35 +111,35 @@ static inline int __init doccheck(void __iomem *potential, unsigned long physadr
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return 0;
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#endif /* CONFIG_MTD_DOCPROBE_55AA */
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-#ifndef DOC_PASSIVE_PROBE
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+#ifndef DOC_PASSIVE_PROBE
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/* It's not possible to cleanly detect the DiskOnChip - the
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* bootup procedure will put the device into reset mode, and
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* it's not possible to talk to it without actually writing
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* to the DOCControl register. So we store the current contents
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* of the DOCControl register's location, in case we later decide
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* that it's not a DiskOnChip, and want to put it back how we
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- * found it.
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+ * found it.
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*/
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tmp2 = ReadDOC(window, DOCControl);
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-
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+
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/* Reset the DiskOnChip ASIC */
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- WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET,
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+ WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET,
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window, DOCControl);
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- WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET,
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+ WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET,
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window, DOCControl);
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-
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+
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/* Enable the DiskOnChip ASIC */
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- WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL,
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+ WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL,
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window, DOCControl);
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- WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL,
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+ WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL,
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window, DOCControl);
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-#endif /* !DOC_PASSIVE_PROBE */
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+#endif /* !DOC_PASSIVE_PROBE */
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/* We need to read the ChipID register four times. For some
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newer DiskOnChip 2000 units, the first three reads will
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return the DiskOnChip Millennium ident. Don't ask. */
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ChipID = ReadDOC(window, ChipID);
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-
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+
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switch (ChipID) {
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case DOC_ChipID_Doc2k:
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/* Check the TOGGLE bit in the ECC register */
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@@ -149,7 +149,7 @@ static inline int __init doccheck(void __iomem *potential, unsigned long physadr
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if (tmp != tmpb && tmp == tmpc)
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return ChipID;
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break;
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-
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+
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case DOC_ChipID_DocMil:
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/* Check for the new 2000 with Millennium ASIC */
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ReadDOC(window, ChipID);
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@@ -164,7 +164,7 @@ static inline int __init doccheck(void __iomem *potential, unsigned long physadr
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if (tmp != tmpb && tmp == tmpc)
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return ChipID;
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break;
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-
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+
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case DOC_ChipID_DocMilPlus16:
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case DOC_ChipID_DocMilPlus32:
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case 0:
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@@ -179,7 +179,7 @@ static inline int __init doccheck(void __iomem *potential, unsigned long physadr
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DOC_MODE_BDECT;
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WriteDOC(tmp, window, Mplus_DOCControl);
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WriteDOC(~tmp, window, Mplus_CtrlConfirm);
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-
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+
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mdelay(1);
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/* Enable the DiskOnChip ASIC */
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tmp = DOC_MODE_NORMAL | DOC_MODE_MDWREN | DOC_MODE_RST_LAT |
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@@ -187,7 +187,7 @@ static inline int __init doccheck(void __iomem *potential, unsigned long physadr
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WriteDOC(tmp, window, Mplus_DOCControl);
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WriteDOC(~tmp, window, Mplus_CtrlConfirm);
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mdelay(1);
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-#endif /* !DOC_PASSIVE_PROBE */
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+#endif /* !DOC_PASSIVE_PROBE */
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ChipID = ReadDOC(window, ChipID);
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@@ -227,7 +227,7 @@ static inline int __init doccheck(void __iomem *potential, unsigned long physadr
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WriteDOC(tmp2, window, DOCControl);
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#endif
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return 0;
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-}
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+}
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static int docfound;
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@@ -244,10 +244,10 @@ static void __init DoC_Probe(unsigned long physadr)
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void (*initroutine)(struct mtd_info *) = NULL;
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docptr = ioremap(physadr, DOC_IOREMAP_LEN);
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-
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+
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if (!docptr)
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return;
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-
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+
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if ((ChipID = doccheck(docptr, physadr))) {
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if (ChipID == DOC_ChipID_Doc2kTSOP) {
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/* Remove this at your own peril. The hardware driver works but nothing prevents you from erasing bad blocks */
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@@ -263,9 +263,9 @@ static void __init DoC_Probe(unsigned long physadr)
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iounmap(docptr);
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return;
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}
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-
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+
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this = (struct DiskOnChip *)(&mtd[1]);
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-
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+
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memset((char *)mtd,0, sizeof(struct mtd_info));
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memset((char *)this, 0, sizeof(struct DiskOnChip));
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@@ -281,13 +281,13 @@ static void __init DoC_Probe(unsigned long physadr)
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im_funcname = "DoC2k_init";
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im_modname = "doc2000";
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break;
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-
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+
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case DOC_ChipID_Doc2k:
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name="2000";
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im_funcname = "DoC2k_init";
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im_modname = "doc2000";
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break;
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-
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+
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case DOC_ChipID_DocMil:
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name="Millennium";
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#ifdef DOC_SINGLE_DRIVER
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@@ -331,7 +331,7 @@ static void __init DoC_Probe(unsigned long physadr)
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static int __init init_doc(void)
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{
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int i;
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-
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+
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if (doc_config_location) {
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printk(KERN_INFO "Using configured DiskOnChip probe address 0x%lx\n", doc_config_location);
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DoC_Probe(doc_config_location);
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