pmc551.c

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			  "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 <[e-mail]>");
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 wierd 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");
                        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