path: root/arch/ppc/platforms/pplus.c

/*
 * Board and PCI setup routines for MCG PowerPlus
 *
 * Author: Randy Vinson <rvinson@mvista.com>
 *
 * Derived from original PowerPlus PReP work by
 * Cort Dougan, Johnnie Peters, Matt Porter, and
 * Troy Benjegerdes.
 *
 * 2001-2004 (c) MontaVista, Software, Inc.  This file is licensed under
 * the terms of the GNU General Public License version 2.  This program
 * is licensed "as is" without any warranty of any kind, whether express
 * or implied.
 */

#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/console.h>
#include <linux/pci.h>
#include <linux/ide.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>

#include <asm/system.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/dma.h>
#include <asm/machdep.h>
#include <asm/prep_nvram.h>
#include <asm/vga.h>
#include <asm/i8259.h>
#include <asm/open_pic.h>
#include <asm/hawk.h>
#include <asm/todc.h>
#include <asm/bootinfo.h>
#include <asm/kgdb.h>
#include <asm/reg.h>

#include "pplus.h"

#undef DUMP_DBATS

TODC_ALLOC();

extern void pplus_setup_hose(void);
extern void pplus_set_VIA_IDE_native(void);

extern unsigned long loops_per_jiffy;
unsigned char *Motherboard_map_name;

/* Tables for known hardware */

/* Motorola Mesquite */
static inline int
mesquite_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
{
	static char pci_irq_table[][4] =
	    /*
	     *      MPIC interrupts for various IDSEL values (MPIC IRQ0 =
	     *      Linux IRQ16 (to leave room for ISA IRQs at 0-15).
	     *      PCI IDSEL/INTPIN->INTLINE
	     *         A   B   C   D
	     */
	{
		{18,  0,  0,  0},	/* IDSEL 14 - Enet 0 */
		{ 0,  0,  0,  0},	/* IDSEL 15 - unused */
		{19, 19, 19, 19},	/* IDSEL 16 - PMC Slot 1 */
		{ 0,  0,  0,  0},	/* IDSEL 17 - unused */
		{ 0,  0,  0,  0},	/* IDSEL 18 - unused */
		{ 0,  0,  0,  0},	/* IDSEL 19 - unused */
		{24, 25, 26, 27},	/* IDSEL 20 - P2P bridge (to cPCI 1) */
		{ 0,  0,  0,  0},	/* IDSEL 21 - unused */
		{28, 29, 30, 31}	/* IDSEL 22 - P2P bridge (to cPCI 2) */
	};

	const long min_idsel = 14, max_idsel = 22, irqs_per_slot = 4;
	return PCI_IRQ_TABLE_LOOKUP;
}

/* Motorola Sitka */
static inline int
sitka_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
{
	static char pci_irq_table[][4] =
	    /*
	     *      MPIC interrupts for various IDSEL values (MPIC IRQ0 =
	     *      Linux IRQ16 (to leave room for ISA IRQs at 0-15).
	     *      PCI IDSEL/INTPIN->INTLINE
	     *         A   B   C   D
	     */
	{
		{18,  0,  0,  0},	/* IDSEL 14 - Enet 0 */
		{ 0,  0,  0,  0},	/* IDSEL 15 - unused */
		{25, 26, 27, 28},	/* IDSEL 16 - PMC Slot 1 */
		{28, 25, 26, 27},	/* IDSEL 17 - PMC Slot 2 */
		{ 0,  0,  0,  0},	/* IDSEL 18 - unused */
		{ 0,  0,  0,  0},	/* IDSEL 19 - unused */
		{20,  0,  0,  0}	/* IDSEL 20 - P2P bridge (to cPCI) */
	};

	const long min_idsel = 14, max_idsel = 20, irqs_per_slot = 4;
	return PCI_IRQ_TABLE_LOOKUP;
}

/* Motorola MTX */
static inline int
MTX_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
{
	static char pci_irq_table[][4] =
	    /*
	     *      MPIC interrupts for various IDSEL values (MPIC IRQ0 =
	     *      Linux IRQ16 (to leave room for ISA IRQs at 0-15).
	     *      PCI IDSEL/INTPIN->INTLINE
	     *         A   B   C   D
	     */
	{
		{19,  0,  0,  0},	/* IDSEL 12 - SCSI   */
		{ 0,  0,  0,  0},	/* IDSEL 13 - unused */
		{18,  0,  0,  0},	/* IDSEL 14 - Enet   */
		{ 0,  0,  0,  0},	/* IDSEL 15 - unused */
		{25, 26, 27, 28},	/* IDSEL 16 - PMC Slot 1 */
		{26, 27, 28, 25},	/* IDSEL 17 - PMC Slot 2 */
		{27, 28, 25, 26}	/* IDSEL 18 - PCI Slot 3 */
	};

	const long min_idsel = 12, max_idsel = 18, irqs_per_slot = 4;
	return PCI_IRQ_TABLE_LOOKUP;
}

/* Motorola MTX Plus */
/* Secondary bus interrupt routing is not supported yet */
static inline int
MTXplus_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
{
	static char pci_irq_table[][4] =
	    /*
	     *      MPIC interrupts for various IDSEL values (MPIC IRQ0 =
	     *      Linux IRQ16 (to leave room for ISA IRQs at 0-15).
	     *      PCI IDSEL/INTPIN->INTLINE
	     *         A   B   C   D
	     */
	{
		{19,  0,  0,  0},	/* IDSEL 12 - SCSI   */
		{ 0,  0,  0,  0},	/* IDSEL 13 - unused */
		{18,  0,  0,  0},	/* IDSEL 14 - Enet 1 */
		{ 0,  0,  0,  0},	/* IDSEL 15 - unused */
		{25, 26, 27, 28},	/* IDSEL 16 - PCI Slot 1P */
		{26, 27, 28, 25},	/* IDSEL 17 - PCI Slot 2P */
		{27, 28, 25, 26},	/* IDSEL 18 - PCI Slot 3P */
		{26,  0,  0,  0},	/* IDSEL 19 - Enet 2 */
		{ 0,  0,  0,  0}	/* IDSEL 20 - P2P Bridge */
	};

	const long min_idsel =