/*
 *
 * Copyright (C) Eicon Technology Corporation, 2000.
 *
 * Eicon File Revision :    1.9  
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY OF ANY KIND WHATSOEVER INCLUDING ANY 
 * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */


#include <linux/fs.h>
#undef N_DATA   /* Because we have our own definition */

#include <asm/segment.h>
#include <asm/io.h>

#include "sys.h"
#include "idi.h"
#include "constant.h"
#include "divas.h"
#undef ID_MASK
#include "pc.h"
#include "pr_pc.h"

#include "adapter.h"
#include "uxio.h"

#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/ioport.h>

#define HW_ID_EICON_PCI			0x1133
#define HW_ID_DIVA_SERVER_P		0xE014
#define HW_ID_DIVA_SERVER_B_ST	0xE010
#define HW_ID_DIVA_SERVER_B_U	0xE013
#define HW_ID_DIVA_SERVER_Q   	0xE012

struct file_operations Divas_fops;
int Divas_major;

extern int do_ioctl(struct inode *pDivasInode, struct file *pDivasFile, 
			 unsigned int command, unsigned long arg);
extern unsigned int do_poll(struct file *pFile, struct poll_table_struct *pPollTable);
extern ssize_t do_read(struct file *pFile, char *pUserBuffer, size_t BufferSize, loff_t *pOffset);
extern int do_open(struct inode *, struct file *);
extern int do_release(struct inode *, struct file *);

int FPGA_Done=0;

int DivasCardsDiscover(void)
{
	word wNumCards = 0, wDeviceIndex = 0;
	byte byBus, byFunc;
	word wPCIConsultation, PCItmp;
	dword j, i;
	unsigned int PCIserial;
	dia_card_t Card;
	byte *b;
	
	while (wDeviceIndex < 10)
	{
		wPCIConsultation = pcibios_find_device(HW_ID_EICON_PCI, 
				HW_ID_DIVA_SERVER_Q, 
				wDeviceIndex, 
				&byBus, &byFunc);

		if (wPCIConsultation == PCIBIOS_SUCCESSFUL)
		{

			dword dwRAM, dwDivasIOBase, dwCFG, dwCTL; 			
			byte byIRQ;
			
			printk(KERN_DEBUG "Divas: DIVA Server 4BRI Found\n");
			pcibios_read_config_dword(byBus, byFunc, PCI_BASE_ADDRESS_2,(unsigned int *) &dwRAM);
			dwRAM &= 0xFFC00000;
			
			pcibios_read_config_dword(byBus, byFunc, PCI_BASE_ADDRESS_1,(unsigned int *) &dwDivasIOBase);
			dwDivasIOBase &= 0xFFFFFF00;
			
			pcibios_read_config_dword(byBus, byFunc, PCI_BASE_ADDRESS_0,(unsigned int *) &dwCFG);
			dwCFG &= 0xFFFFFF00;
			
			pcibios_read_config_dword(byBus, byFunc, PCI_BASE_ADDRESS_3,(unsigned int *) &dwCTL);
			dwCTL &= 0xFFFFE000;
			

			pcibios_read_config_byte(byBus, byFunc, PCI_INTERRUPT_LINE, &byIRQ);
			/* Retrieve the serial number */

			pcibios_write_config_word(byBus,byFunc,0x4E,0x00FC);

			for (j=0, PCItmp=0; j<10000 && !PCItmp; j++)
			{
				pcibios_read_config_word(byBus,byFunc,0x4E, &PCItmp);
				PCItmp &= 0x8000;  // extract done flag
			}

			pcibios_read_config_dword(byBus,byFunc,0x50, &PCIserial);

		
			Card.memory[DIVAS_RAM_MEMORY] = ioremap(dwRAM, 0x400000);
			Card.memory[DIVAS_CTL_MEMORY] = ioremap(dwCTL, 0x2000);
			Card.memory[DIVAS_CFG_MEMORY] = ioremap(dwCFG, 0x100);
			Card.io_base=dwDivasIOBase;

			Card.irq = byIRQ;
			
			Card.card_type = DIA_CARD_TYPE_DIVA_SERVER_Q;
			Card.bus_type = DIA_BUS_TYPE_PCI;
	
			FPGA_Done = 0;

			/* Create four virtual card structures as we want to treat 
			   the 4Bri card as 4 Bri cards*/
			for(i=0;i<4;i++)
			{

				b=Card.memory[DIVAS_RAM_MEMORY];
				b+=(MQ_PROTCODE_OFFSET) * (i==0?0:1); 
				DPRINTF(("divas: offset = 0x%x", i* MQ_PROTCODE_OFFSET));
				Card.memory[DIVAS_RAM_MEMORY]=b;
 
				b = Card.memory[DIVAS_RAM_MEMORY];
				b += MQ_SM_OFFSET;
				Card.memory[DIVAS_SHARED_MEMORY] = b;

				Card.bus_num = byBus;
				Card.func_num = byFunc;
				Card.slot = -1;

			
				/* Fill in Name */
				Card.name[0] = 'D';
				Card.name[1] = 'I';
				Card.name[2] = 'V';
				Card.name[3] = 'A';
				Card.name[4] = 'S';
				Card.name[5] = 'Q';
				Card.name[6] = '0' + i;
				Card.name[7] = '\0';

				Card.serial = PCIserial;

			 	Card.card_id = wNumCards;

 				if (DivasCardNew(&Card) != 0)
				{
					// Force for loop to terminate
					i = 4;
					continue;
				}
				wNumCards++;

			}//for
		}
		wDeviceIndex++;
	}

	wDeviceIndex = 0;

	while (wDeviceIndex < 10)
	{
		wPCIConsultation = pcibios_find_device(HW_ID_EICON_PCI, 
				HW_ID_DIVA_SERVER_B_ST, 
				wDeviceIndex, 
				&byBus, &byFunc);

		if (wPCIConsultation == PCIBIOS_SUCCESSFUL)
		{
			dword dwPLXIOBase, dwDivasIOBase;
			byte byIRQ;

			printk(KERN_DEBUG "Divas: DIVA Server BRI (S/T) Found\n");
			pcibios_read_config_dword(byBus, byFunc, PCI_BASE_ADDRESS_1, (unsigned int *) &dwPLXIOBase);
			dwPLXIOBase &= 0xFFFFFF80;

			pcibios_read_config_dword(byBus, byFunc, PCI_BASE_ADDRESS_2, (unsigned int *) &dwDivasIOBase);
			dwDivasIOBase &= 0xFFFFFFFC;

			pcibios_read_config_byte(byBus, byFunc, PCI_INTERRUPT_LINE, &byIRQ);

			Card.card_id = wNumCards;
			Card.card_type = DIA_CARD_TYPE_DIVA_SERVER_B;
			Card.bus_type = DIA_BUS_TYPE_PCI;
			Card.irq = byIRQ;
			Card.reset_base = dwPLXIOBase;
			Card.io_base = dwDivasIOBase;
			Card.bus_num = byBus;
			Card.func_num = byFunc;
			Card.slot = -1;
			Card.name[0] = 'D';
			Card.name[1] = 'I';
			Card.name[2] = 'V';
			Card.name[3] = 'A';
			Card.name[4] = 'S';
			Card.name[5] = 'B';
			Card.name[6] = '\0';

			if (check_region(Card.io_base, 0x20))
			{
				printk(KERN_WARNING "Divas: DIVA I/O Base already in use 0x%x-0x%x\n", Card.io_base, Card.io_base + 0x1F);
				wDeviceIndex++;
				continue;
			}

			if (check_region(Card.reset_base, 0x80))
			{
				printk(KERN_WARNING "Divas: PLX I/O Base already in use 0x%x-0x%x\n", Card.reset_base, Card.reset_base + 0x7F);
				wDeviceIndex++;
				continue;
			}

			if (DivasCardNew(&Card) != 0)
			{
				wDeviceIndex++;
				continue;
			}
			wNumCards++;
		}

		wPCIConsultation = pcibios_find_device(HW_ID_EICON_PCI, 
				HW_ID_DIVA_SERVER_B_U, 
				wDeviceIndex, 
				&byBus, &byFunc);

		if (wPCIConsultation == PCIBIOS_SUCCESSFUL)
		{
			dword dwPLXIOBase, dwDivasIOBase;
			byte byIRQ;

			printk(KERN_DEBUG "Divas: DIVA Server BRI (U) Found\n");

			pcibios_read_config_dword(byBus, byFunc, PCI_BASE_ADDRESS_1, (unsigned int *) &dwPLXIOBase);
			dwPLXIOBase &= 0xFFFFFF80;

			pcibios_read_config_dword(byBus, byFunc, PCI_BASE_ADDRESS_2, (unsigned int *) &dwDivasIOBase);
			dwDivasIOBase &= 0xFFFFFFFC;

			pcibios_read_config_byte(byBus, byFunc, PCI_INTERRUPT_LINE, &byIRQ);

			Card.card_id = wNumCards;
			Card.card_type = DIA_CARD_TYPE_DIVA_SERVER_B;
			Card.bus_type = DIA_BUS_TYPE_PCI;
			Card.irq = byIRQ;
			Card.reset_base = dwPLXIOBase;
			Card.io_base = dwDivasIOBase;
			Card.bus_num = byBus;
			Card.func_num = byFunc;
			Card.slot = -1;
			Card.name[0] = 'D';
			Card.name[1] = 'I';
			Card.name[2] = 'V';
			Card.name[3] = 'A';
			Card.name[4] = 'S';
			Card.name[5] = 'B';
			Card.name[6] = '\0';

			if (check_region(Card.io_base, 0x20))
			{
				printk(KERN_WARNING "Divas: DIVA I/O Base already in use 0x%x-0x%x\n", Card.io_base, Card.io_base + 0x1F);	
				wDeviceIndex++;
				continue;
			}

			if (check_region(Card.reset_base, 0x80))
			{
				printk(KERN_WARNING "Divas: PLX I/O Base already in use 0x%x-0x%x\n", Card.reset_base, Card.reset_base + 0x7F);
				wDeviceIndex++;
				continue;
			}

			if (DivasCardNew(&Card) != 0)
			{
				wDeviceIndex++;
				continue;
			}
			wNumCards++;
		}

		wDeviceIndex++;
	}

	wDeviceIndex = 0;

	while (wDeviceIndex < 10)
	{
		wPCIConsultation = pcibios_find_device(HW_ID_EICON_PCI, 
				HW_ID_DIVA_SERVER_P, 
				wDeviceIndex, 
				&byBus, &byFunc);

		if (wPCIConsultation == PCIBIOS_SUCCESSFUL)
		{
			dword dwRAM, dwREG, dwCFG;
			byte byIRQ;

			printk(KERN_DEBUG "Divas: DIVA Server PRI Found\n");

			pcibios_read_config_dword(byBus, byFunc, PCI_BASE_ADDRESS_0, (unsigned int *) &dwRAM);
			dwRAM &= 0xFFFFF000;

			pcibios_read_config_dword(byBus, byFunc, PCI_BASE_ADDRESS_2, (unsigned int *) &dwREG);
			dwREG &= 0xFFFFF000;
			
			pcibios_read_config_dword(byBus, byFunc, PCI_BASE_ADDRESS_4, (unsigned int *) &dwCFG);
			dwCFG &= 0xFFFFF000;

			pcibios_read_config_byte(byBus, byFunc, PCI_INTERRUPT_LINE, &byIRQ);

			Card.memory[DIVAS_RAM_MEMORY] = ioremap(dwRAM, 0x10000);
			Card.memory[DIVAS_REG_MEMORY] = ioremap(dwREG, 0x4000);
			Card.memory[DIVAS_CFG_MEMORY] = ioremap(dwCFG, 0x1000);
			Card.memory[DIVAS_SHARED_MEMORY] = Card.memory[DIVAS_RAM_MEMORY] + DIVAS_SHARED_OFFSET;

/*			pcibios_read_config_dword(byBus, byFunc, PCI_BASE_ADDRESS_1, (unsigned int *) &dwPLXIOBase);
			dwPLXIOBase &= 0xFFFFFFFc;

			pcibios_read_config_dword(byBus, byFunc, PCI_BASE_ADDRESS_2, (unsigned int *) &dwDivasIOBase);
			dwDivasIOBase &= 0xFFFFFF80;

			pcibios_read_config_byte(byBus, byFunc, PCI_INTERRUPT_LINE, &byIRQ);
*/
			Card.card_id = wNumCards;
			Card.card_type = DIA_CARD_TYPE_DIVA_SERVER;
			Card.bus_type = DIA_BUS_TYPE_PCI;
			Card.irq = byIRQ;
/*			Card.reset_base = dwPLXIOBase;
			Card.io_base = dwDivasIOBase;*/
			Card.bus_num = byBus;
			Card.func_num = byFunc;
			Card.slot = -1;
			Card.name[0] = 'D';
			Card.name[1] = 'I';
			Card.name[2] = 'V';
			Card.name[3] = 'A';
			Card.name[4] = 'S';
			Card.name[5] = 'P';
			Card.name[6] = '\0';

			if (DivasCardNew(&Card) != 0)
			{
				wDeviceIndex++;
				continue;
			}
			wNumCards++;
		}

		wDeviceIndex++;
	}


	printk(KERN_INFO "Divas: %d cards detected\n", wNumCards);

	if(wNumCards == 0)
	{
		return -1;
	}

	Divas_fops.ioctl = do_ioctl;
	Divas_fops.poll = do_poll;
	Divas_fops.read = do_read;
	Divas_fops.open = do_open;
	Divas_fops.release = do_release;

	Divas_major = register_chrdev(0, "Divas", &Divas_fops);

	if (Divas_major < 0)
	{
		printk(KERN_WARNING "Divas: Unable to register character driver\n");
		return -1;
	}

	return 0;
}

/* Error return -1 */
int DivasConfigGet(dia_card_t *card)
{
	/* Retrieve Config from O/S? Not in Linux */
	return 0;
}

dia_config_t *DivasConfig(card_t *card, dia_config_t *config)
{
	/*	If config retrieved from OS then copy the data into a dia_config_t structure here
		and return the pointer here. If the config 'came from above' then just 

			return config;
	*/

	return config;
}