linux-2.6.15.6
源代码在线查看： ixdp2400.c
/* * arch/arm/mach-ixp2000/ixdp2400.c * * IXDP2400 platform support * * Original Author: Naeem Afzal * Maintainer: Deepak Saxena * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /************************************************************************* * 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. */ .phys_ram = 0x00000000, .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
