diff options
Diffstat (limited to 'arch/arm/mach-ixp2000/ixdp2400.c')
| -rw-r--r-- | arch/arm/mach-ixp2000/ixdp2400.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/arch/arm/mach-ixp2000/ixdp2400.c b/arch/arm/mach-ixp2000/ixdp2400.c new file mode 100644 index 0000000..df3ff26 --- /dev/null +++ b/arch/arm/mach-ixp2000/ixdp2400.c @@ -0,0 +1,179 @@ +/* + * 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/config.h> +#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/slab.h> +#include <linux/delay.h> + +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/pgtable.h> +#include <asm/page.h> +#include <asm/system.h> +#include <asm/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(); +} + +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_find_slot(1, IXDP2400_SLAVE_ENET_DEVFN); + pci_remove_bus_device(dev); + } else { + dev = pci_find_slot(1, IXDP2400_MASTER_ENET_DEVFN); + pci_remove_bus_device(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 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.") + BOOT_MEM(0x00000000, IXP2000_UART_PHYS_BASE, IXP2000_UART_VIRT_BASE) + BOOT_PARAMS(0x00000100) + MAPIO(ixdp2x00_map_io) + INITIRQ(ixdp2400_init_irq) + .timer = &ixdp2400_timer, + INIT_MACHINE(ixdp2x00_init_machine) +MACHINE_END + |