mtd: doc: remove support for DoC 2000/2001/2001+

These drivers are deprecated for very long time, and we have a different driver
for these called "diskonchip". Thus, kill the ancient cruft.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 0 insertions, 325 deletions

diff --git a/drivers/mtd/devices/docprobe.c b/drivers/mtd/devices/docprobe.c
deleted file mode 100644
index 88b3fd3e18a7..000000000000
--- a/drivers/mtd/devices/docprobe.c
+++ /dev/null
@@ -1,325 +0,0 @@
-
-/* Linux driver for Disk-On-Chip devices			*/
-/* Probe routines common to all DoC devices			*/
-/* (C) 1999 Machine Vision Holdings, Inc.			*/
-/* (C) 1999-2003 David Woodhouse <dwmw2@infradead.org>		*/
-
-
-/* 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
-   to detect a chip in reset mode, but is at least guaranteed not to lock
-   the machine.
-
-   If you have this problem, uncomment the following line:
-#define DOC_PASSIVE_PROBE
-*/
-
-
-/* DOC_SINGLE_DRIVER:
-   Millennium driver has been merged into DOC2000 driver.
-
-   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
-   below and also enabling it in your configuration. If this fixes the
-   problems, please send a report to the MTD mailing list at
-   <linux-mtd@lists.infradead.org>.
-*/
-#define DOC_SINGLE_DRIVER
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <asm/errno.h>
-#include <asm/io.h>
-#include <linux/delay.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/types.h>
-
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/nand.h>
-#include <linux/mtd/doc2000.h>
-
-
-static unsigned long doc_config_location = CONFIG_MTD_DOCPROBE_ADDRESS;
-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,
-	0xfffd0000, 0xfffd2000, 0xfffd4000, 0xfffd6000,
-	0xfffd8000, 0xfffda000, 0xfffdc000, 0xfffde000,
-	0xfffe0000, 0xfffe2000, 0xfffe4000, 0xfffe6000,
-	0xfffe8000, 0xfffea000, 0xfffec000, 0xfffee000,
-#else /*  CONFIG_MTD_DOCPROBE_HIGH */
-	0xc8000, 0xca000, 0xcc000, 0xce000,
-	0xd0000, 0xd2000, 0xd4000, 0xd6000,
-	0xd8000, 0xda000, 0xdc000, 0xde000,
-	0xe0000, 0xe2000, 0xe4000, 0xe6000,
-	0xe8000, 0xea000, 0xec000, 0xee000,
-#endif /*  CONFIG_MTD_DOCPROBE_HIGH */
-#endif
-	0xffffffff };
-
-/* doccheck: Probe a given memory window to see if there's a DiskOnChip present */
-
-static inline int __init doccheck(void __iomem *potential, unsigned long physadr)
-{
-	void __iomem *window=potential;
-	unsigned char tmp, tmpb, tmpc, ChipID;
-#ifndef DOC_PASSIVE_PROBE
-	unsigned char tmp2;
-#endif
-
-	/* Routine copied from the Linux DOC driver */
-
-#ifdef CONFIG_MTD_DOCPROBE_55AA
-	/* Check for 0x55 0xAA signature at beginning of window,
-	   this is no longer true once we remove the IPL (for Millennium */
-	if (ReadDOC(window, Sig1) != 0x55 || ReadDOC(window, Sig2) != 0xaa)
-		return 0;
-#endif /* CONFIG_MTD_DOCPROBE_55AA */
-
-#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.
-	 */
-	tmp2 = ReadDOC(window, DOCControl);
-
-	/* Reset the DiskOnChip ASIC */
-	WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_RESET,
-		 window, DOCControl);
-	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,
-		 window, DOCControl);
-	WriteDOC(DOC_MODE_CLR_ERR | DOC_MODE_MDWREN | DOC_MODE_NORMAL,
-		 window, DOCControl);
-#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 */
-		tmp  = ReadDOC(window, 2k_ECCStatus) & DOC_TOGGLE_BIT;
-		tmpb = ReadDOC(window, 2k_ECCStatus) & DOC_TOGGLE_BIT;
-		tmpc = ReadDOC(window, 2k_ECCStatus) & DOC_TOGGLE_BIT;
-		if (tmp != tmpb && tmp == tmpc)
-				return ChipID;
-		break;
-
-	case DOC_ChipID_DocMil:
-		/* Check for the new 2000 with Millennium ASIC */
-		ReadDOC(window, ChipID);
-		ReadDOC(window, ChipID);
-		if (ReadDOC(window, ChipID) != DOC_ChipID_DocMil)
-			ChipID = DOC_ChipID_Doc2kTSOP;
-
-		/* Check the TOGGLE bit in the ECC register */
-		tmp  = ReadDOC(window, ECCConf) & DOC_TOGGLE_BIT;
-		tmpb = ReadDOC(window, ECCConf) & DOC_TOGGLE_BIT;
-		tmpc = ReadDOC(window, ECCConf) & DOC_TOGGLE_BIT;
-		if (tmp != tmpb && tmp == tmpc)
-				return ChipID;
-		break;
-
-	case DOC_ChipID_DocMilPlus16:
-	case DOC_ChipID_DocMilPlus32:
-	case 0:
-		/* Possible Millennium+, need to do more checks */
-#ifndef DOC_PASSIVE_PROBE
-		/* Possibly release from power down mode */
-		for (tmp = 0; (tmp < 4); tmp++)
-			ReadDOC(window, Mplus_Power);
-
-		/* Reset the DiskOnChip ASIC */
-		tmp = DOC_MODE_RESET | DOC_MODE_MDWREN | DOC_MODE_RST_LAT |
-			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 |
-			DOC_MODE_BDECT;
-		WriteDOC(tmp, window, Mplus_DOCControl);
-		WriteDOC(~tmp, window, Mplus_CtrlConfirm);
-		mdelay(1);
-#endif /* !DOC_PASSIVE_PROBE */
-
-		ChipID = ReadDOC(window, ChipID);
-
-		switch (ChipID) {
-		case DOC_ChipID_DocMilPlus16:
-		case DOC_ChipID_DocMilPlus32:
-			/* Check the TOGGLE bit in the toggle register */
-			tmp  = ReadDOC(window, Mplus_Toggle) & DOC_TOGGLE_BIT;
-			tmpb = ReadDOC(window, Mplus_Toggle) & DOC_TOGGLE_BIT;
-			tmpc = ReadDOC(window, Mplus_Toggle) & DOC_TOGGLE_BIT;
-			if (tmp != tmpb && tmp == tmpc)
-					return ChipID;
-		default:
-			break;
-		}
-		/* FALL TRHU */
-
-	default:
-
-#ifdef CONFIG_MTD_DOCPROBE_55AA
-		printk(KERN_DEBUG "Possible DiskOnChip with unknown ChipID %2.2X found at 0x%lx\n",
-		       ChipID, physadr);
-#endif
-#ifndef DOC_PASSIVE_PROBE
-		/* Put back the contents of the DOCControl register, in case it's not
-		 * actually a DiskOnChip.
-		 */
-		WriteDOC(tmp2, window, DOCControl);
-#endif
-		return 0;
-	}
-
-	printk(KERN_WARNING "DiskOnChip failed TOGGLE test, dropping.\n");
-
-#ifndef DOC_PASSIVE_PROBE
-	/* Put back the contents of the DOCControl register: it's not a DiskOnChip */
-	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)
-{
-	void __iomem *docptr;
-	struct DiskOnChip *this;
-	struct mtd_info *mtd;
-	int ChipID;
-	char namebuf[15];
-	char *name = namebuf;
-	void (*initroutine)(struct mtd_info *) = NULL;
-
-	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(docptr);
-			return;
-		}
-		docfound = 1;
-		mtd = kzalloc(sizeof(struct DiskOnChip) + sizeof(struct mtd_info), GFP_KERNEL);
-		if (!mtd) {
-			printk(KERN_WARNING "Cannot allocate memory for data structures. Dropping.\n");
-			iounmap(docptr);
-			return;
-		}
-
-		this = (struct DiskOnChip *)(&mtd[1]);
-		mtd->priv = this;
-		this->virtadr = docptr;
-		this->physadr = physadr;
-		this->ChipID = ChipID;
-		sprintf(namebuf, "with ChipID %2.2X", ChipID);
-
-		switch(ChipID) {
-		case DOC_ChipID_Doc2kTSOP:
-			name="2000 TSOP";
-			initroutine = symbol_request(DoC2k_init);
-			break;
-
-		case DOC_ChipID_Doc2k:
-			name="2000";
-			initroutine = symbol_request(DoC2k_init);
-			break;
-
-		case DOC_ChipID_DocMil:
-			name="Millennium";
-#ifdef DOC_SINGLE_DRIVER
-			initroutine = symbol_request(DoC2k_init);
-#else
-			initroutine = symbol_request(DoCMil_init);
-#endif /* DOC_SINGLE_DRIVER */
-			break;
-
-		case DOC_ChipID_DocMilPlus16:
-		case DOC_ChipID_DocMilPlus32:
-			name="MillenniumPlus";
-			initroutine = symbol_request(DoCMilPlus_init);
-			break;
-		}
-
-		if (initroutine) {
-			(*initroutine)(mtd);
-			symbol_put_addr(initroutine);
-			return;
-		}
-		printk(KERN_NOTICE "Cannot find driver for DiskOnChip %s at 0x%lX\n", name, physadr);
-		kfree(mtd);
-	}
-	iounmap(docptr);
-}
-
-
-/****************************************************************************
- *
- * Module stuff
- *
- ****************************************************************************/
-
-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);
-	} else {
-		for (i=0; (doc_locations[i] != 0xffffffff); i++) {
-			DoC_Probe(doc_locations[i]);
-		}
-	}
-	/* No banner message any more. Print a message if no DiskOnChip
-	   found, so the user knows we at least tried. */
-	if (!docfound)
-		printk(KERN_INFO "No recognised DiskOnChip devices found\n");
-	return -EAGAIN;
-}
-
-module_init(init_doc);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
-MODULE_DESCRIPTION("Probe code for DiskOnChip 2000 and Millennium devices");
-