[mirror_ubuntu-bionic-kernel.git] / arch / arm / mach-ixp2000 / ixdp2400.c

/*
 * arch/arm/mach-ixp2000/ixdp2400.c
 *
 * IXDP2400 platform support
 *
 * Original Author: Naeem Afzal <naeem.m.afzal@intel.com>
 * Maintainer: Deepak Saxena <dsaxena@plexity.net>
 *
 * Copyright (C) 2002 Intel Corp.
 * Copyright (C) 2003-2004 MontaVista Software, Inc.
 *
 *  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 of the  License, or (at your
 *  option) any later version.
 */
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/device.h>
#include <linux/bitops.h>
#include <linux/pci.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/io.h>

#include <asm/irq.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/system.h>
#include <mach/hardware.h>
#include <asm/mach-types.h>

#include <asm/mach/pci.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>
#include <asm/mach/time.h>
#include <asm/mach/flash.h>
#include <asm/mach/arch.h>

/*************************************************************************
 * IXDP2400 timer tick
 *************************************************************************/
static void __init ixdp2400_timer_init(void)
{
	int numerator, denominator;
	int denom_array[] = {2, 4, 8, 16, 1, 2, 4, 8};

	numerator = (*(IXDP2400_CPLD_SYS_CLK_M) & 0xFF) *2;
	denominator = denom_array[(*(IXDP2400_CPLD_SYS_CLK_N) & 0x7)];

	ixp2000_init_time(((3125000 * numerator) / (denominator)) / 2);
}

static struct sys_timer ixdp2400_timer = {
	.init		= ixdp2400_timer_init,
	.offset		= ixp2000_gettimeoffset,
};

/*************************************************************************
 * IXDP2400 PCI
 *************************************************************************/
void __init ixdp2400_pci_preinit(void)
{
	ixp2000_reg_write(IXP2000_PCI_ADDR_EXT, 0x00100000);
	ixp2000_pci_preinit();
	pcibios_setup("firmware");
}

int ixdp2400_pci_setup(int nr, struct pci_sys_data *sys)
{
	sys->mem_offset = 0xe0000000;

	ixp2000_pci_setup(nr, sys);

	return 1;
}

static int __init ixdp2400_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
{
	if (ixdp2x00_master_npu()) {

		/*
		 * Root bus devices.  Slave NPU is only one with interrupt.
		 * Everything else, we just return -1 b/c nothing else
		 * on the root bus has interrupts.
		 */
		if(!dev->bus->self) {
			if(dev->devfn == IXDP2X00_SLAVE_NPU_DEVFN )
				return IRQ_IXDP2400_INGRESS_NPU;

			return -1;
		}

		/*
		 * Bridge behind the PMC slot.
		 * NOTE: Only INTA from the PMC slot is routed. VERY BAD.
		 */
		if(dev->bus->self->devfn == IXDP2X00_PMC_DEVFN &&
			dev->bus->parent->self->devfn == IXDP2X00_P2P_DEVFN &&
			!dev->bus->parent->self->bus->parent)
				  return IRQ_IXDP2400_PMC;

		/*
		 * Device behind the first bridge
		 */
		if(dev->bus->self->devfn == IXDP2X00_P2P_DEVFN) {
			switch(dev->devfn) {
				case IXDP2400_MASTER_ENET_DEVFN:	
					return IRQ_IXDP2400_ENET;	
			
				case IXDP2400_MEDIA_DEVFN:
					return IRQ_IXDP2400_MEDIA_PCI;

				case IXDP2400_SWITCH_FABRIC_DEVFN:
					return IRQ_IXDP2400_SF_PCI;

				case IXDP2X00_PMC_DEVFN:
					return IRQ_IXDP2400_PMC;
			}
		}

		return -1;
	} else return IRQ_IXP2000_PCIB; /* Slave NIC interrupt */
}


static void ixdp2400_pci_postinit(void)
{
	struct pci_dev *dev;

	if (ixdp2x00_master_npu()) {
		dev = pci_get_bus_and_slot(1, IXDP2400_SLAVE_ENET_DEVFN);
		pci_remove_bus_device(dev);
		pci_dev_put(dev);
	} else {
		dev = pci_get_bus_and_slot(1, IXDP2400_MASTER_ENET_DEVFN);
		pci_remove_bus_device(dev);
		pci_dev_put(dev);

		ixdp2x00_slave_pci_postinit();
	}
}

static struct hw_pci ixdp2400_pci __initdata = {
	.nr_controllers	= 1,
	.setup		= ixdp2400_pci_setup,
	.preinit	= ixdp2400_pci_preinit,
	.postinit	= ixdp2400_pci_postinit,
	.scan		= ixp2000_pci_scan_bus,
	.map_irq	= ixdp2400_pci_map_irq,
};

int __init ixdp2400_pci_init(void)
{
	if (machine_is_ixdp2400())
		pci_common_init(&ixdp2400_pci);

	return 0;
}

subsys_initcall(ixdp2400_pci_init);

void __init ixdp2400_init_irq(void)
{
	ixdp2x00_init_irq(IXDP2400_CPLD_INT_STAT, IXDP2400_CPLD_INT_MASK, IXDP2400_NR_IRQS);
}

MACHINE_START(IXDP2400, "Intel IXDP2400 Development Platform")
	/* Maintainer: MontaVista Software, Inc. */
	.phys_io	= IXP2000_UART_PHYS_BASE,
	.io_pg_offst	= ((IXP2000_UART_VIRT_BASE) >> 18) & 0xfffc,
	.boot_params	= 0x00000100,
	.map_io		= ixdp2x00_map_io,
	.init_irq	= ixdp2400_init_irq,
	.timer		= &ixdp2400_timer,
	.init_machine	= ixdp2x00_init_machine,
MACHINE_END
Commit	Line	Data
1da177e4 LT	1	/*
	2	* arch/arm/mach-ixp2000/ixdp2400.c
	3	*
	4	* IXDP2400 platform support
	5	*
	6	* Original Author: Naeem Afzal <naeem.m.afzal@intel.com>
	7	* Maintainer: Deepak Saxena <dsaxena@plexity.net>
	8	*
	9	* Copyright (C) 2002 Intel Corp.
	10	* Copyright (C) 2003-2004 MontaVista Software, Inc.
	11	*
	12	* This program is free software; you can redistribute it and/or modify it
	13	* under the terms of the GNU General Public License as published by the
	14	* Free Software Foundation; either version 2 of the License, or (at your
	15	* option) any later version.
	16	*/
1da177e4 LT	17	#include <linux/kernel.h>
	18	#include <linux/init.h>
	19	#include <linux/mm.h>
	20	#include <linux/sched.h>
	21	#include <linux/interrupt.h>
	22	#include <linux/device.h>
	23	#include <linux/bitops.h>
	24	#include <linux/pci.h>
	25	#include <linux/ioport.h>
1da177e4	26	#include <linux/delay.h>
fced80c7	27	#include <linux/io.h>
1da177e4	28
1da177e4 LT	29	#include <asm/irq.h>
	30	#include <asm/pgtable.h>
	31	#include <asm/page.h>
	32	#include <asm/system.h>
a09e64fb	33	#include <mach/hardware.h>
1da177e4 LT	34	#include <asm/mach-types.h>
	35
	36	#include <asm/mach/pci.h>
	37	#include <asm/mach/map.h>
	38	#include <asm/mach/irq.h>
	39	#include <asm/mach/time.h>
	40	#include <asm/mach/flash.h>
	41	#include <asm/mach/arch.h>
	42
	43	/*************************************************************************
	44	* IXDP2400 timer tick
	45	*************************************************************************/
	46	static void __init ixdp2400_timer_init(void)
	47	{
	48	int numerator, denominator;
	49	int denom_array[] = {2, 4, 8, 16, 1, 2, 4, 8};
	50
	51	numerator = ((IXDP2400_CPLD_SYS_CLK_M) & 0xFF) 2;
	52	denominator = denom_array[(*(IXDP2400_CPLD_SYS_CLK_N) & 0x7)];
	53
	54	ixp2000_init_time(((3125000 * numerator) / (denominator)) / 2);
	55	}
	56
	57	static struct sys_timer ixdp2400_timer = {
	58	.init = ixdp2400_timer_init,
	59	.offset = ixp2000_gettimeoffset,
	60	};
	61
	62	/*************************************************************************
	63	* IXDP2400 PCI
	64	*************************************************************************/
	65	void __init ixdp2400_pci_preinit(void)
	66	{
	67	ixp2000_reg_write(IXP2000_PCI_ADDR_EXT, 0x00100000);
	68	ixp2000_pci_preinit();
f8e5b284	69	pcibios_setup("firmware");
1da177e4 LT	70	}
	71
	72	int ixdp2400_pci_setup(int nr, struct pci_sys_data *sys)
	73	{
	74	sys->mem_offset = 0xe0000000;
	75
	76	ixp2000_pci_setup(nr, sys);
	77
	78	return 1;
	79	}
	80
	81	static int __init ixdp2400_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
	82	{
	83	if (ixdp2x00_master_npu()) {
	84
	85	/*
	86	* Root bus devices. Slave NPU is only one with interrupt.
	87	* Everything else, we just return -1 b/c nothing else
	88	* on the root bus has interrupts.
	89	*/
	90	if(!dev->bus->self) {
	91	if(dev->devfn == IXDP2X00_SLAVE_NPU_DEVFN )
	92	return IRQ_IXDP2400_INGRESS_NPU;
	93
	94	return -1;
	95	}
	96
	97	/*
	98	* Bridge behind the PMC slot.
	99	* NOTE: Only INTA from the PMC slot is routed. VERY BAD.
	100	*/
	101	if(dev->bus->self->devfn == IXDP2X00_PMC_DEVFN &&
	102	dev->bus->parent->self->devfn == IXDP2X00_P2P_DEVFN &&
	103	!dev->bus->parent->self->bus->parent)
	104	return IRQ_IXDP2400_PMC;
	105
	106	/*
	107	* Device behind the first bridge
	108	*/
	109	if(dev->bus->self->devfn == IXDP2X00_P2P_DEVFN) {
	110	switch(dev->devfn) {
	111	case IXDP2400_MASTER_ENET_DEVFN:
	112	return IRQ_IXDP2400_ENET;
	113
	114	case IXDP2400_MEDIA_DEVFN:
	115	return IRQ_IXDP2400_MEDIA_PCI;
	116
	117	case IXDP2400_SWITCH_FABRIC_DEVFN:
	118	return IRQ_IXDP2400_SF_PCI;
	119
	120	case IXDP2X00_PMC_DEVFN:
	121	return IRQ_IXDP2400_PMC;
	122	}
	123	}
	124
	125	return -1;
	126	} else return IRQ_IXP2000_PCIB; /* Slave NIC interrupt */
	127	}
	128
	129
	130	static void ixdp2400_pci_postinit(void)
	131	{
	132	struct pci_dev *dev;
	133
134	if (ixdp2x00_master_npu()) {
7281c248	135	dev = pci_get_bus_and_slot(1, IXDP2400_SLAVE_ENET_DEVFN);
1da177e4	136	pci_remove_bus_device(dev);
cf610ca2	137	pci_dev_put(dev);
1da177e4	138	} else {
7281c248	139	dev = pci_get_bus_and_slot(1, IXDP2400_MASTER_ENET_DEVFN);
1da177e4	140	pci_remove_bus_device(dev);
cf610ca2	141	pci_dev_put(dev);
1da177e4 LT	142
	143	ixdp2x00_slave_pci_postinit();
	144	}
	145	}
	146
	147	static struct hw_pci ixdp2400_pci __initdata = {
	148	.nr_controllers = 1,
	149	.setup = ixdp2400_pci_setup,
	150	.preinit = ixdp2400_pci_preinit,
	151	.postinit = ixdp2400_pci_postinit,
	152	.scan = ixp2000_pci_scan_bus,
	153	.map_irq = ixdp2400_pci_map_irq,
	154	};
	155
	156	int __init ixdp2400_pci_init(void)
	157	{
	158	if (machine_is_ixdp2400())
	159	pci_common_init(&ixdp2400_pci);
	160
	161	return 0;
	162	}
	163
	164	subsys_initcall(ixdp2400_pci_init);
	165
cdea4606	166	void __init ixdp2400_init_irq(void)
1da177e4 LT	167	{
	168	ixdp2x00_init_irq(IXDP2400_CPLD_INT_STAT, IXDP2400_CPLD_INT_MASK, IXDP2400_NR_IRQS);
	169	}
	170
	171	MACHINE_START(IXDP2400, "Intel IXDP2400 Development Platform")
e9dea0c6	172	/* Maintainer: MontaVista Software, Inc. */
e9dea0c6 RK	173	.phys_io = IXP2000_UART_PHYS_BASE,
	174	.io_pg_offst = ((IXP2000_UART_VIRT_BASE) >> 18) & 0xfffc,
	175	.boot_params = 0x00000100,
	176	.map_io = ixdp2x00_map_io,
	177	.init_irq = ixdp2400_init_irq,
1da177e4	178	.timer = &ixdp2400_timer,
e9dea0c6	179	.init_machine = ixdp2x00_init_machine,
1da177e4 LT	180	MACHINE_END
1da177e4 LT	181