patch-2.4.6 linux/drivers/mtd/pmc551.c

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diff -u --recursive --new-file v2.4.5/linux/drivers/mtd/pmc551.c linux/drivers/mtd/pmc551.c
@@ -1,863 +0,0 @@
-/*
- * $Id: pmc551.c,v 1.11 2000/11/23 13:40:12 dwmw2 Exp $
- *
- * PMC551 PCI Mezzanine Ram Device
- *
- * Author:
- *       Mark Ferrell <mferrell@mvista.com>
- *       Copyright 1999,2000 Nortel Networks
- *
- * License:
- *	 As part of this driver was derrived from the slram.c driver it falls
- *	 under the same license, which is GNU General Public License v2
- *
- * Description:
- *	 This driver is intended to support the PMC551 PCI Ram device from
- *	 Ramix Inc.  The PMC551 is a PMC Mezzanine module for cPCI embedded
- *	 systems.  The device contains a single SROM that initally programs the
- *	 V370PDC chipset onboard the device, and various banks of DRAM/SDRAM
- *	 onboard.  This driver implements this PCI Ram device as an MTD (Memory
- *	 Technologies Device) so that it can be used to hold a filesystem, or
- *	 for added swap space in embedded systems.  Since the memory on this
- *	 board isn't as fast as main memory we do not try to hook it into main
- *	 memeory as that would simply reduce performance on the system.  Using
- *	 it as a block device allows us to use it as high speed swap or for a
- *	 high speed disk device of some sort.  Which becomes very useful on
- *	 diskless systems in the embedded market I might add.
- *	 
- * Notes:
- *	 Due to what I assume is more buggy SROM, the 64M PMC551 I have
- *	 available claims that all 4 of it's DRAM banks have 64M of ram 
- *	 configured (making a grand total of 256M onboard).  This is slightly
- *	 annoying since the BAR0 size reflects the aperture size, not the dram
- *	 size, and the V370PDC supplies no other method for memory size
- *	 discovery.  This problem is mostly only relivant when compiled as a
- *	 module, as the unloading of the module with an aperture size  smaller
- *	 then the ram will cause the driver to detect the onboard memory size
- *	 to be equal to the aperture size when the module is reloaded.  Soooo,
- *	 to help, the module supports an msize option to allow the
- *	 specification of the onboard memory, and an asize option, to allow the
- *	 specification of the aperture size.  The aperture must be equal to or
- *	 less then the memory size, the driver will correct this if you screw
- *	 it up.  This problem is not relivant for compiled in drivers as
- *	 compiled in drivers only init once.
- *
- * Credits:
- *       Saeed Karamooz <saeed@ramix.com> of Ramix INC. for the initial
- *       example code of how to initialize this device and for help with
- *       questions I had concerning operation of the device.
- *
- *       Most of the MTD code for this driver was originally written for the
- *       slram.o module in the MTD drivers package written by David Hinds
- *       <dhinds@allegro.stanford.edu> which allows the mapping of system
- *       memory into an mtd device.  Since the PMC551 memory module is
- *       accessed in the same fashion as system memory, the slram.c code
- *       became a very nice fit to the needs of this driver.  All we added was
- *       PCI detection/initialization to the driver and automaticly figure out
- *       the size via the PCI detection.o, later changes by Corey Minyard
- *       settup the card to utilize a 1M sliding apature.
- *
- *	 Corey Minyard <minyard@nortelnetworks.com>
- *       * Modified driver to utilize a sliding apature instead of mapping all
- *       memory into kernel space which turned out to be very wastefull.
- *       * Located a bug in the SROM's initialization sequence that made the
- *       memory unusable, added a fix to code to touch up the DRAM some.
- *
- * Bugs/FIXME's:
- *       * MUST fix the init function to not spin on a register
- *       waiting for it to set .. this does not safely handle busted devices
- *       that never reset the register correctly which will cause the system to
- *       hang w/ a reboot beeing the only chance at recover.
- */
-
-#include <linux/config.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <asm/uaccess.h>
-#include <linux/types.h>
-#include <linux/sched.h>
-#include <linux/init.h>
-#include <linux/ptrace.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <linux/timer.h>
-#include <linux/major.h>
-#include <linux/fs.h>
-#include <linux/ioctl.h>
-#include <asm/io.h>
-#include <asm/system.h>
-#include <asm/segment.h>
-#include <stdarg.h>
-#include <linux/pci.h>
-
-#ifndef CONFIG_PCI
-#error Enable PCI in your kernel config
-#endif
-
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/pmc551.h>
-#include <linux/mtd/compatmac.h>
-
-#if LINUX_VERSION_CODE > 0x20300
-#define PCI_BASE_ADDRESS(dev) (dev->resource[0].start)
-#else
-#define PCI_BASE_ADDRESS(dev) (dev->base_address[0])
-#endif
-
-static struct mtd_info *pmc551list = NULL;
-
-static int pmc551_erase (struct mtd_info *mtd, struct erase_info *instr)
-{
-        struct mypriv *priv = mtd->priv;
-        u32 start_addr_highbits;
-        u32 end_addr_highbits;
-        u32 start_addr_lowbits;
-        u32 end_addr_lowbits;
-        unsigned long end;
-
-        end = instr->addr + instr->len;
-
-        /* Is it too much memory?  The second check find if we wrap around
-           past the end of a u32. */
-        if ((end > mtd->size) || (end < instr->addr)) {
-                return -EINVAL;
-        }
-
-        start_addr_highbits = instr->addr & PMC551_ADDR_HIGH_MASK;
-        end_addr_highbits = end & PMC551_ADDR_HIGH_MASK;
-        start_addr_lowbits = instr->addr & PMC551_ADDR_LOW_MASK;
-        end_addr_lowbits = end & PMC551_ADDR_LOW_MASK;
-
-        pci_write_config_dword ( priv->dev,
-                                 PMC551_PCI_MEM_MAP0,
-                                 (priv->mem_map0_base_val
-                                  | start_addr_highbits));
-        if (start_addr_highbits == end_addr_highbits) {
-                /* The whole thing fits within one access, so just one shot
-                   will do it. */
-                memset(priv->start + start_addr_lowbits,
-                       0xff,
-                       instr->len);
-        } else {
-                /* We have to do multiple writes to get all the data
-                   written. */
-                memset(priv->start + start_addr_lowbits,
-                       0xff,
-                       priv->aperture_size - start_addr_lowbits);
-                start_addr_highbits += priv->aperture_size;
-                while (start_addr_highbits != end_addr_highbits) {
-                        pci_write_config_dword ( priv->dev,
-                                                 PMC551_PCI_MEM_MAP0,
-                                                 (priv->mem_map0_base_val
-                                                  | start_addr_highbits));
-                        memset(priv->start,
-                               0xff,
-                               priv->aperture_size);
-                        start_addr_highbits += priv->aperture_size;
-                }
-                priv->curr_mem_map0_val = (priv->mem_map0_base_val
-                                           | start_addr_highbits);
-                pci_write_config_dword ( priv->dev,
-                                         PMC551_PCI_MEM_MAP0,
-                                         priv->curr_mem_map0_val);
-                memset(priv->start,
-                       0xff,
-                       end_addr_lowbits);
-        }
-
-	instr->state = MTD_ERASE_DONE;
-
-        if (instr->callback) {
-                (*(instr->callback))(instr);
-	}
-
-        return 0;
-}
-
-
-static void pmc551_unpoint (struct mtd_info *mtd, u_char *addr)
-{}
-
-
-static int pmc551_read (struct mtd_info *mtd,
-                        loff_t from,
-                        size_t len,
-                        size_t *retlen,
-                        u_char *buf)
-{
-        struct mypriv *priv = (struct mypriv *)mtd->priv;
-        u32 start_addr_highbits;
-        u32 end_addr_highbits;
-        u32 start_addr_lowbits;
-        u32 end_addr_lowbits;
-        unsigned long end;
-        u_char *copyto = buf;
-
-
-        /* Is it past the end? */
-        if (from > mtd->size) {
-                return -EINVAL;
-        }
-
-        end = from + len;
-        start_addr_highbits = from & PMC551_ADDR_HIGH_MASK;
-        end_addr_highbits = end & PMC551_ADDR_HIGH_MASK;
-        start_addr_lowbits = from & PMC551_ADDR_LOW_MASK;
-        end_addr_lowbits = end & PMC551_ADDR_LOW_MASK;
-
-
-        /* Only rewrite the first value if it doesn't match our current
-           values.  Most operations are on the same page as the previous
-           value, so this is a pretty good optimization. */
-        if (priv->curr_mem_map0_val !=
-                        (priv->mem_map0_base_val | start_addr_highbits)) {
-                priv->curr_mem_map0_val = (priv->mem_map0_base_val
-                                           | start_addr_highbits);
-                pci_write_config_dword ( priv->dev,
-                                         PMC551_PCI_MEM_MAP0,
-                                         priv->curr_mem_map0_val);
-        }
-
-        if (start_addr_highbits == end_addr_highbits) {
-                /* The whole thing fits within one access, so just one shot
-                   will do it. */
-                memcpy(copyto,
-                       priv->start + start_addr_lowbits,
-                       len);
-                copyto += len;
-        } else {
-                /* We have to do multiple writes to get all the data
-                   written. */
-                memcpy(copyto,
-                       priv->start + start_addr_lowbits,
-                       priv->aperture_size - start_addr_lowbits);
-                copyto += priv->aperture_size - start_addr_lowbits;
-                start_addr_highbits += priv->aperture_size;
-                while (start_addr_highbits != end_addr_highbits) {
-                        pci_write_config_dword ( priv->dev,
-                                                 PMC551_PCI_MEM_MAP0,
-                                                 (priv->mem_map0_base_val
-                                                  | start_addr_highbits));
-                        memcpy(copyto,
-                               priv->start,
-                               priv->aperture_size);
-                        copyto += priv->aperture_size;
-                        start_addr_highbits += priv->aperture_size;
-                        if (start_addr_highbits >= mtd->size) {
-                                /* Make sure we have the right value here. */
-                                priv->curr_mem_map0_val
-                                = (priv->mem_map0_base_val
-                                   | start_addr_highbits);
-                                goto out;
-                        }
-                }
-                priv->curr_mem_map0_val = (priv->mem_map0_base_val
-                                           | start_addr_highbits);
-                pci_write_config_dword ( priv->dev,
-                                         PMC551_PCI_MEM_MAP0,
-                                         priv->curr_mem_map0_val);
-                memcpy(copyto,
-                       priv->start,
-                       end_addr_lowbits);
-                copyto += end_addr_lowbits;
-        }
-
-out:
-        *retlen = copyto - buf;
-        return 0;
-}
-
-static int pmc551_write (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf)
-{
-        struct mypriv *priv = (struct mypriv *)mtd->priv;
-        u32 start_addr_highbits;
-        u32 end_addr_highbits;
-        u32 start_addr_lowbits;
-        u32 end_addr_lowbits;
-        unsigned long end;
-        const u_char *copyfrom = buf;
-
-
-        /* Is it past the end? */
-        if (to > mtd->size) {
-                return -EINVAL;
-        }
-
-        end = to + len;
-        start_addr_highbits = to & PMC551_ADDR_HIGH_MASK;
-        end_addr_highbits = end & PMC551_ADDR_HIGH_MASK;
-        start_addr_lowbits = to & PMC551_ADDR_LOW_MASK;
-        end_addr_lowbits = end & PMC551_ADDR_LOW_MASK;
-
-
-        /* Only rewrite the first value if it doesn't match our current
-           values.  Most operations are on the same page as the previous
-           value, so this is a pretty good optimization. */
-        if (priv->curr_mem_map0_val !=
-                        (priv->mem_map0_base_val | start_addr_highbits)) {
-                priv->curr_mem_map0_val = (priv->mem_map0_base_val
-                                           | start_addr_highbits);
-                pci_write_config_dword ( priv->dev,
-                                         PMC551_PCI_MEM_MAP0,
-                                         priv->curr_mem_map0_val);
-        }
-
-        if (start_addr_highbits == end_addr_highbits) {
-                /* The whole thing fits within one access, so just one shot
-                   will do it. */
-                memcpy(priv->start + start_addr_lowbits,
-                       copyfrom,
-                       len);
-                copyfrom += len;
-        } else {
-                /* We have to do multiple writes to get all the data
-                   written. */
-                memcpy(priv->start + start_addr_lowbits,
-                       copyfrom,
-                       priv->aperture_size - start_addr_lowbits);
-                copyfrom += priv->aperture_size - start_addr_lowbits;
-                start_addr_highbits += priv->aperture_size;
-                while (start_addr_highbits != end_addr_highbits) {
-                        pci_write_config_dword ( priv->dev,
-                                                 PMC551_PCI_MEM_MAP0,
-                                                 (priv->mem_map0_base_val
-                                                  | start_addr_highbits));
-                        memcpy(priv->start,
-                               copyfrom,
-                               priv->aperture_size);
-                        copyfrom += priv->aperture_size;
-                        start_addr_highbits += priv->aperture_size;
-                        if (start_addr_highbits >= mtd->size) {
-                                /* Make sure we have the right value here. */
-                                priv->curr_mem_map0_val
-                                = (priv->mem_map0_base_val
-                                   | start_addr_highbits);
-                                goto out;
-                        }
-                }
-                priv->curr_mem_map0_val = (priv->mem_map0_base_val
-                                           | start_addr_highbits);
-                pci_write_config_dword ( priv->dev,
-                                         PMC551_PCI_MEM_MAP0,
-                                         priv->curr_mem_map0_val);
-                memcpy(priv->start,
-                       copyfrom,
-                       end_addr_lowbits);
-                copyfrom += end_addr_lowbits;
-        }
-
-out:
-        *retlen = copyfrom - buf;
-        return 0;
-}
-
-/*
- * Fixup routines for the V370PDC
- * PCI device ID 0x020011b0
- *
- * This function basicly kick starts the DRAM oboard the card and gets it
- * ready to be used.  Before this is done the device reads VERY erratic, so
- * much that it can crash the Linux 2.2.x series kernels when a user cat's
- * /proc/pci .. though that is mainly a kernel bug in handling the PCI DEVSEL
- * register.  FIXME: stop spinning on registers .. must implement a timeout
- * mechanism
- * returns the size of the memory region found.
- */
-static u32 fixup_pmc551 (struct pci_dev *dev)
-{
-#ifdef CONFIG_MTD_PMC551_BUGFIX
-        u32 dram_data;
-#endif
-        u32 size, dcmd, cfg, dtmp;
-        u16 cmd, tmp, i;
-	u8 bcmd, counter;
-
-        /* Sanity Check */
-        if(!dev) {
-                return -ENODEV;
-        }
-
-	/*
-	 * Attempt to reset the card
-	 * FIXME: Stop Spinning registers
-	 */
-	counter=0;
-	/* unlock registers */
-	pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, 0xA5 );
-	/* read in old data */
-	pci_read_config_byte(dev, PMC551_SYS_CTRL_REG, &bcmd );
-	/* bang the reset line up and down for a few */
-	for(i=0;i<10;i++) {
-		counter=0;
-		bcmd &= ~0x80;
-		while(counter++ < 100) {
-			pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, bcmd);
-		}
-		counter=0;
-		bcmd |= 0x80;
-		while(counter++ < 100) {
-			pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, bcmd);
-		}
-	}
-	bcmd |= (0x40|0x20);
-	pci_write_config_byte(dev, PMC551_SYS_CTRL_REG, bcmd);
-
-        /* 
-	 * Take care and turn off the memory on the device while we
-	 * tweak the configurations
-	 */
-        pci_read_config_word(dev, PCI_COMMAND, &cmd);
-        tmp = cmd & ~(PCI_COMMAND_IO|PCI_COMMAND_MEMORY);
-        pci_write_config_word(dev, PCI_COMMAND, tmp);
-
-	/*
-	 * Disable existing aperture before probing memory size
-	 */
-	pci_read_config_dword(dev, PMC551_PCI_MEM_MAP0, &dcmd);
-        dtmp=(dcmd|PMC551_PCI_MEM_MAP_ENABLE|PMC551_PCI_MEM_MAP_REG_EN);
-	pci_write_config_dword(dev, PMC551_PCI_MEM_MAP0, dtmp);
-	/*
-	 * Grab old BAR0 config so that we can figure out memory size
-	 * This is another bit of kludge going on.  The reason for the
-	 * redundancy is I am hoping to retain the original configuration
-	 * previously assigned to the card by the BIOS or some previous 
-	 * fixup routine in the kernel.  So we read the old config into cfg,
-	 * then write all 1's to the memory space, read back the result into
-	 * "size", and then write back all the old config.
-	 */
-	pci_read_config_dword( dev, PCI_BASE_ADDRESS_0, &cfg );
-#ifndef CONFIG_MTD_PMC551_BUGFIX
-	pci_write_config_dword( dev, PCI_BASE_ADDRESS_0, ~0 );
-	pci_read_config_dword( dev, PCI_BASE_ADDRESS_0, &size );
-	pci_write_config_dword( dev, PCI_BASE_ADDRESS_0, cfg );
-	size=~(size&PCI_BASE_ADDRESS_MEM_MASK)+1;
-#else
-        /*
-         * Get the size of the memory by reading all the DRAM size values
-         * and adding them up.
-         *
-         * KLUDGE ALERT: the boards we are using have invalid column and
-         * row mux values.  We fix them here, but this will break other
-         * memory configurations.
-         */
-        pci_read_config_dword(dev, PMC551_DRAM_BLK0, &dram_data);
-        size = PMC551_DRAM_BLK_GET_SIZE(dram_data);
-        dram_data = PMC551_DRAM_BLK_SET_COL_MUX(dram_data, 0x5);
-        dram_data = PMC551_DRAM_BLK_SET_ROW_MUX(dram_data, 0x9);
-        pci_write_config_dword(dev, PMC551_DRAM_BLK0, dram_data);
-
-        pci_read_config_dword(dev, PMC551_DRAM_BLK1, &dram_data);
-        size += PMC551_DRAM_BLK_GET_SIZE(dram_data);
-        dram_data = PMC551_DRAM_BLK_SET_COL_MUX(dram_data, 0x5);
-        dram_data = PMC551_DRAM_BLK_SET_ROW_MUX(dram_data, 0x9);
-        pci_write_config_dword(dev, PMC551_DRAM_BLK1, dram_data);
-
-        pci_read_config_dword(dev, PMC551_DRAM_BLK2, &dram_data);
-        size += PMC551_DRAM_BLK_GET_SIZE(dram_data);
-        dram_data = PMC551_DRAM_BLK_SET_COL_MUX(dram_data, 0x5);
-        dram_data = PMC551_DRAM_BLK_SET_ROW_MUX(dram_data, 0x9);
-        pci_write_config_dword(dev, PMC551_DRAM_BLK2, dram_data);
-
-        pci_read_config_dword(dev, PMC551_DRAM_BLK3, &dram_data);
-        size += PMC551_DRAM_BLK_GET_SIZE(dram_data);
-        dram_data = PMC551_DRAM_BLK_SET_COL_MUX(dram_data, 0x5);
-        dram_data = PMC551_DRAM_BLK_SET_ROW_MUX(dram_data, 0x9);
-        pci_write_config_dword(dev, PMC551_DRAM_BLK3, dram_data);
-
-        /*
-         * Oops .. something went wrong
-         */
-        if( (size &= PCI_BASE_ADDRESS_MEM_MASK) == 0) {
-                return -ENODEV;
-        }
-#endif /* CONFIG_MTD_PMC551_BUGFIX */
-
-	if ((cfg&PCI_BASE_ADDRESS_SPACE) != PCI_BASE_ADDRESS_SPACE_MEMORY) {
-                return -ENODEV;
-	}
-
-        /*
-         * Precharge Dram
-         */
-        pci_write_config_word( dev, PMC551_SDRAM_MA, 0x0400 );
-        pci_write_config_word( dev, PMC551_SDRAM_CMD, 0x00bf );
-
-        /*
-         * Wait until command has gone through
-         * FIXME: register spinning issue
-         */
-        do {	pci_read_config_word( dev, PMC551_SDRAM_CMD, &cmd );
-		if(counter++ > 100)break;
-        } while ( (PCI_COMMAND_IO) & cmd );
-
-        /*
-	 * Turn on auto refresh 
-	 * The loop is taken directly from Ramix's example code.  I assume that
-	 * this must be held high for some duration of time, but I can find no
-	 * documentation refrencing the reasons why.
-	 * 
-         */
-        for ( i = 1; i<=8 ; i++) {
-                pci_write_config_word (dev, PMC551_SDRAM_CMD, 0x0df);
-
-                /*
-                 * Make certain command has gone through
-                 * FIXME: register spinning issue
-                 */
-		counter=0;
-                do {	pci_read_config_word(dev, PMC551_SDRAM_CMD, &cmd);
-			if(counter++ > 100)break;
-                } while ( (PCI_COMMAND_IO) & cmd );
-        }
-
-        pci_write_config_word ( dev, PMC551_SDRAM_MA, 0x0020);
-        pci_write_config_word ( dev, PMC551_SDRAM_CMD, 0x0ff);
-
-        /*
-         * Wait until command completes
-         * FIXME: register spinning issue
-         */
-	counter=0;
-        do {	pci_read_config_word ( dev, PMC551_SDRAM_CMD, &cmd);
-		if(counter++ > 100)break;
-        } while ( (PCI_COMMAND_IO) & cmd );
-
-        pci_read_config_dword ( dev, PMC551_DRAM_CFG, &dcmd);
-        dcmd |= 0x02000000;
-        pci_write_config_dword ( dev, PMC551_DRAM_CFG, dcmd);
-
-        /*
-         * Check to make certain fast back-to-back, if not
-         * then set it so
-         */
-        pci_read_config_word( dev, PCI_STATUS, &cmd);
-        if((cmd&PCI_COMMAND_FAST_BACK) == 0) {
-                cmd |= PCI_COMMAND_FAST_BACK;
-                pci_write_config_word( dev, PCI_STATUS, cmd);
-        }
-
-        /*
-         * Check to make certain the DEVSEL is set correctly, this device
-         * has a tendancy to assert DEVSEL and TRDY when a write is performed
-         * to the memory when memory is read-only
-         */
-        if((cmd&PCI_STATUS_DEVSEL_MASK) != 0x0) {
-                cmd &= ~PCI_STATUS_DEVSEL_MASK;
-                pci_write_config_word( dev, PCI_STATUS, cmd );
-        }
-        /*
-         * Set to be prefetchable and put everything back based on old cfg.
-	 * it's possible that the reset of the V370PDC nuked the original
-	 * settup
-         */
-        cfg |= PCI_BASE_ADDRESS_MEM_PREFETCH;
-	pci_write_config_dword( dev, PCI_BASE_ADDRESS_0, cfg );
-
-        /*
-         * Turn PCI memory and I/O bus access back on
-         */
-        pci_write_config_word( dev, PCI_COMMAND,
-                               PCI_COMMAND_MEMORY | PCI_COMMAND_IO );
-#ifdef CONFIG_MTD_PMC551_DEBUG
-        /*
-         * Some screen fun
-         */
-        printk(KERN_DEBUG "pmc551: %d%c (0x%x) of %sprefetchable memory at 0x%lx\n",
-	       (size<1024)?size:(size<1048576)?size/1024:size/1024/1024,
-               (size<1024)?'B':(size<1048576)?'K':'M',
-	       size, ((dcmd&(0x1<<3)) == 0)?"non-":"",
-               PCI_BASE_ADDRESS(dev)&PCI_BASE_ADDRESS_MEM_MASK );
-
-        /*
-         * Check to see the state of the memory
-         */
-        pci_read_config_dword( dev, PMC551_DRAM_BLK0, &dcmd );
-        printk(KERN_DEBUG "pmc551: DRAM_BLK0 Flags: %s,%s\n"
-			  "pmc551: DRAM_BLK0 Size: %d at %d\n"
-			  "pmc551: DRAM_BLK0 Row MUX: %d, Col MUX: %d\n",
-               (((0x1<<1)&dcmd) == 0)?"RW":"RO",
-               (((0x1<<0)&dcmd) == 0)?"Off":"On",
-	       PMC551_DRAM_BLK_GET_SIZE(dcmd),
-	       ((dcmd>>20)&0x7FF), ((dcmd>>13)&0x7), ((dcmd>>9)&0xF) );
-
-        pci_read_config_dword( dev, PMC551_DRAM_BLK1, &dcmd );
-        printk(KERN_DEBUG "pmc551: DRAM_BLK1 Flags: %s,%s\n"
-			  "pmc551: DRAM_BLK1 Size: %d at %d\n"
-			  "pmc551: DRAM_BLK1 Row MUX: %d, Col MUX: %d\n",
-               (((0x1<<1)&dcmd) == 0)?"RW":"RO",
-               (((0x1<<0)&dcmd) == 0)?"Off":"On",
-	       PMC551_DRAM_BLK_GET_SIZE(dcmd),
-	       ((dcmd>>20)&0x7FF), ((dcmd>>13)&0x7), ((dcmd>>9)&0xF) );
-
-        pci_read_config_dword( dev, PMC551_DRAM_BLK2, &dcmd );
-        printk(KERN_DEBUG "pmc551: DRAM_BLK2 Flags: %s,%s\n"
-			  "pmc551: DRAM_BLK2 Size: %d at %d\n"
-			  "pmc551: DRAM_BLK2 Row MUX: %d, Col MUX: %d\n",
-               (((0x1<<1)&dcmd) == 0)?"RW":"RO",
-               (((0x1<<0)&dcmd) == 0)?"Off":"On",
-	       PMC551_DRAM_BLK_GET_SIZE(dcmd),
-	       ((dcmd>>20)&0x7FF), ((dcmd>>13)&0x7), ((dcmd>>9)&0xF) );
-
-        pci_read_config_dword( dev, PMC551_DRAM_BLK3, &dcmd );
-        printk(KERN_DEBUG "pmc551: DRAM_BLK3 Flags: %s,%s\n"
-			  "pmc551: DRAM_BLK3 Size: %d at %d\n"
-			  "pmc551: DRAM_BLK3 Row MUX: %d, Col MUX: %d\n",
-               (((0x1<<1)&dcmd) == 0)?"RW":"RO",
-               (((0x1<<0)&dcmd) == 0)?"Off":"On",
-	       PMC551_DRAM_BLK_GET_SIZE(dcmd),
-	       ((dcmd>>20)&0x7FF), ((dcmd>>13)&0x7), ((dcmd>>9)&0xF) );
-
-        pci_read_config_word( dev, PCI_COMMAND, &cmd );
-        printk( KERN_DEBUG "pmc551: Memory Access %s\n",
-                (((0x1<<1)&cmd) == 0)?"off":"on" );
-        printk( KERN_DEBUG "pmc551: I/O Access %s\n",
-                (((0x1<<0)&cmd) == 0)?"off":"on" );
-
-        pci_read_config_word( dev, PCI_STATUS, &cmd );
-        printk( KERN_DEBUG "pmc551: Devsel %s\n",
-                ((PCI_STATUS_DEVSEL_MASK&cmd)==0x000)?"Fast":
-                ((PCI_STATUS_DEVSEL_MASK&cmd)==0x200)?"Medium":
-                ((PCI_STATUS_DEVSEL_MASK&cmd)==0x400)?"Slow":"Invalid" );
-
-        printk( KERN_DEBUG "pmc551: %sFast Back-to-Back\n",
-                ((PCI_COMMAND_FAST_BACK&cmd) == 0)?"Not ":"" );
-
-	pci_read_config_byte(dev, PMC551_SYS_CTRL_REG, &bcmd );
-	printk( KERN_DEBUG "pmc551: EEPROM is under %s control\n"
-			   "pmc551: System Control Register is %slocked to PCI access\n"
-			   "pmc551: System Control Register is %slocked to EEPROM access\n", 
-		(bcmd&0x1)?"software":"hardware",
-		(bcmd&0x20)?"":"un", (bcmd&0x40)?"":"un");
-#endif
-        return size;
-}
-
-/*
- * Kernel version specific module stuffages
- */
-#if LINUX_VERSION_CODE < 0x20211
-#ifdef MODULE
-#define init_pmc551 init_module
-#define cleanup_pmc551 cleanup_module
-#endif
-#define __exit
-#endif
-
-#if defined(MODULE)
-MODULE_AUTHOR("Mark Ferrell <mferrell@mvista.com>");
-MODULE_DESCRIPTION(PMC551_VERSION);
-MODULE_PARM(msize, "i");
-MODULE_PARM_DESC(msize, "memory size, 6=32M, 7=64M, 8=128M, ect.. [32M-1024M]");
-MODULE_PARM(asize, "i");
-MODULE_PARM_DESC(asize, "aperture size, must be <= memsize [1M-1024M]");
-#endif
-/*
- * Stuff these outside the ifdef so as to not bust compiled in driver support
- */
-static int msize=0;
-#if defined(CONFIG_MTD_PMC551_APERTURE_SIZE)
-static int asize=CONFIG_MTD_PMC551_APERTURE_SIZE
-#else
-static int asize=0;
-#endif
-
-/*
- * PMC551 Card Initialization
- */
-int __init init_pmc551(void)
-{
-        struct pci_dev *PCI_Device = NULL;
-        struct mypriv *priv;
-        int count, found=0;
-        struct mtd_info *mtd;
-        u32 length = 0;
-
-	if(msize) {
-		if (msize < 6 || msize > 11 ) {
-			printk(KERN_NOTICE "pmc551: Invalid memory size\n");
-			return -ENODEV;
-		}
-		msize = (512*1024)<<msize;
-	}
-
-	if(asize) {
-		if (asize < 1 || asize > 11 ) {
-			printk(KERN_NOTICE "pmc551: Invalid aperture size\n");
-			return -ENODEV;
-		}
-		asize = (512*1024)<<asize;
-	}
-
-        printk(KERN_INFO PMC551_VERSION);
-
-        if(!pci_present()) {
-                printk(KERN_NOTICE "pmc551: PCI not enabled.\n");
-                return -ENODEV;
-        }
-
-        /*
-         * PCU-bus chipset probe.
-         */
-        for( count = 0; count < MAX_MTD_DEVICES; count++ ) {
-
-                if ( (PCI_Device = pci_find_device( PCI_VENDOR_ID_V3_SEMI,
-                                                    PCI_DEVICE_ID_V3_SEMI_V370PDC, PCI_Device ) ) == NULL) {
-                        break;
-                }
-
-                printk(KERN_NOTICE "pmc551: Found PCI V370PDC IRQ:%d\n",
-                       PCI_Device->irq);
-
-                /*
-                 * The PMC551 device acts VERY weird if you don't init it
-                 * first.  i.e. it will not correctly report devsel.  If for
-                 * some reason the sdram is in a wrote-protected state the
-                 * device will DEVSEL when it is written to causing problems
-                 * with the oldproc.c driver in
-                 * some kernels (2.2.*)
-                 */
-                if((length = fixup_pmc551(PCI_Device)) <= 0) {
-                        printk(KERN_NOTICE "pmc551: Cannot init SDRAM\n");
-                        break;
-                }
-		if(msize) {
-			length = msize;
-			printk(KERN_NOTICE "pmc551: Using specified memory size 0x%x\n", length);
-		}
-
-                mtd = kmalloc(sizeof(struct mtd_info), GFP_KERNEL);
-                if (!mtd) {
-                        printk(KERN_NOTICE "pmc551: Cannot allocate new MTD device.\n");
-                        break;
-                }
-
-                memset(mtd, 0, sizeof(struct mtd_info));
-
-                priv = kmalloc (sizeof(struct mypriv), GFP_KERNEL);
-                if (!priv) {
-                        printk(KERN_NOTICE "pmc551: Cannot allocate new MTD device.\n");
-                        kfree(mtd);
-                        break;
-                }
-                memset(priv, 0, sizeof(*priv));
-                mtd->priv = priv;
-
-                priv->dev = PCI_Device;
-		if(asize) {
-			if(asize > length) {
-				asize=length;
-				printk(KERN_NOTICE "pmc551: reducing aperture size to fit memory [0x%x]\n",asize);
-			} else {
-				printk(KERN_NOTICE "pmc551: Using specified aperture size 0x%x\n", asize);
-			}
-			priv->aperture_size = asize;
-		} else {
-                	priv->aperture_size = length;
-		}
-                priv->start = ioremap((PCI_BASE_ADDRESS(PCI_Device)
-                                       & PCI_BASE_ADDRESS_MEM_MASK),
-                                      priv->aperture_size);
-		
-		/*
-		 * Due to the dynamic nature of the code, we need to figure
-		 * this out in order to stuff the register to set the proper
-		 * aperture size.  If you know of an easier way to do this then
-		 * PLEASE help yourself.
-		 *
-		 * Not with bloody floating point, you don't. Consider yourself
-		 * duly LARTed. dwmw2.
-		 */
-		{
-			u32 size;
-			u16 bits;
-			size = priv->aperture_size>>20;
-			for(bits=0;!(size&0x01)&&size>0;bits++,size=size>>1);
-			//size=((u32)((log10(priv->aperture_size)/.30103)-19)<<4);
-                	priv->mem_map0_base_val = (PMC551_PCI_MEM_MAP_REG_EN
-						| PMC551_PCI_MEM_MAP_ENABLE
-						| size);
-#ifdef CONFIG_MTD_PMC551_DEBUG
-			printk(KERN_NOTICE "pmc551: aperture set to %d[%d]\n", 
-					size, size>>4);
-#endif
-		}
-                priv->curr_mem_map0_val = priv->mem_map0_base_val;
-
-                pci_write_config_dword ( priv->dev,
-                                         PMC551_PCI_MEM_MAP0,
-                                         priv->curr_mem_map0_val);
-
-                mtd->size 		= length;
-                mtd->flags 		= (MTD_CLEAR_BITS
-                                | MTD_SET_BITS
-                                | MTD_WRITEB_WRITEABLE
-                                | MTD_VOLATILE);
-                mtd->erase 		= pmc551_erase;
-                mtd->point 		= NULL;
-                mtd->unpoint 		= pmc551_unpoint;
-                mtd->read 		= pmc551_read;
-                mtd->write 		= pmc551_write;
-                mtd->module 		= THIS_MODULE;
-                mtd->type 		= MTD_RAM;
-                mtd->name 		= "PMC551 RAM board";
-                mtd->erasesize 		= 0x10000;
-
-                if (add_mtd_device(mtd)) {
-                        printk(KERN_NOTICE "pmc551: Failed to register new device\n");
-			iounmap(priv->start);
-                        kfree(mtd->priv);
-                        kfree(mtd);
-                        break;
-                }
-                printk(KERN_NOTICE "Registered pmc551 memory device.\n");
-                printk(KERN_NOTICE "Mapped %dM of memory from 0x%p to 0x%p\n",
-                       priv->aperture_size/1024/1024,
-                       priv->start,
-                       priv->start + priv->aperture_size);
-                printk(KERN_NOTICE "Total memory is %d%c\n",
-	       		(length<1024)?length:
-				(length<1048576)?length/1024:length/1024/1024,
-               		(length<1024)?'B':(length<1048576)?'K':'M');
-		priv->nextpmc551 = pmc551list;
-		pmc551list = mtd;
-		found++;
-        }
-
-        if( !pmc551list ) {
-                printk(KERN_NOTICE "pmc551: not detected,\n");
-                return -ENODEV;
-        } else {
-		printk(KERN_NOTICE "pmc551: %d pmc551 devices loaded\n", found);
-                return 0;
-	}
-}
-
-/*
- * PMC551 Card Cleanup
- */
-static void __exit cleanup_pmc551(void)
-{
-        int found=0;
-        struct mtd_info *mtd;
-	struct mypriv *priv;
-
-	while((mtd=pmc551list)) {
-		priv = (struct mypriv *)mtd->priv;
-		pmc551list = priv->nextpmc551;
-		
-		if(priv->start)
-			iounmap(((struct mypriv *)mtd->priv)->start);
-		
-		kfree (mtd->priv);
-		del_mtd_device(mtd);
-		kfree(mtd);
-		found++;
-	}
-
-	printk(KERN_NOTICE "pmc551: %d pmc551 devices unloaded\n", found);
-}
-
-#if LINUX_VERSION_CODE >= 0x20211
-module_init(init_pmc551);
-module_exit(cleanup_pmc551);
-#endif

FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)