/* * PCI code for DDB5477. * * Copyright (C) 2001 MontaVista Software Inc. * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net * * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org) * * 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/types.h> #include <linux/pci.h> #include <asm/bootinfo.h> #include <asm/debug.h> #include <asm/ddb5xxx/ddb5xxx.h> static struct resource extpci_io_resource = { "ext pci IO space", DDB_PCI0_IO_BASE - DDB_PCI_IO_BASE + 0x4000, DDB_PCI0_IO_BASE - DDB_PCI_IO_BASE + DDB_PCI0_IO_SIZE - 1, IORESOURCE_IO }; static struct resource extpci_mem_resource = { "ext pci memory space", DDB_PCI0_MEM_BASE + 0x100000, DDB_PCI0_MEM_BASE + DDB_PCI0_MEM_SIZE - 1, IORESOURCE_MEM }; static struct resource iopci_io_resource = { "io pci IO space", DDB_PCI1_IO_BASE - DDB_PCI_IO_BASE, DDB_PCI1_IO_BASE - DDB_PCI_IO_BASE + DDB_PCI1_IO_SIZE - 1, IORESOURCE_IO }; static struct resource iopci_mem_resource = { "ext pci memory space", DDB_PCI1_MEM_BASE, DDB_PCI1_MEM_BASE + DDB_PCI1_MEM_SIZE - 1, IORESOURCE_MEM }; extern struct pci_ops ddb5477_ext_pci_ops; extern struct pci_ops ddb5477_io_pci_ops; struct pci_controller ddb5477_ext_controller = { .pci_ops = &ddb5477_ext_pci_ops, .io_resource = &extpci_io_resource, .mem_resource = &extpci_mem_resource }; struct pci_controller ddb5477_io_controller = { .pci_ops = &ddb5477_io_pci_ops, .io_resource = &iopci_io_resource, .mem_resource = &iopci_mem_resource }; /* * we fix up irqs based on the slot number. * The first entry is at AD:11. * Fortunately this works because, although we have two pci buses, * they all have different slot numbers (except for rockhopper slot 20 * which is handled below). * */ /* * irq mapping : device -> pci int # -> vrc4377 irq# , * ddb5477 board manual page 4 and vrc5477 manual page 46 */ /* * based on ddb5477 manual page 11 */ #define MAX_SLOT_NUM 21 static unsigned char irq_map[MAX_SLOT_NUM] = { /* SLOT: 0, AD:11 */ 0xff, /* SLOT: 1, AD:12 */ 0xff, /* SLOT: 2, AD:13 */ 0xff, /* SLOT: 3, AD:14 */ 0xff, /* SLOT: 4, AD:15 */ VRC5477_IRQ_INTA, /* onboard tulip */ /* SLOT: 5, AD:16 */ VRC5477_IRQ_INTB, /* slot 1 */ /* SLOT: 6, AD:17 */ VRC5477_IRQ_INTC, /* slot 2 */ /* SLOT: 7, AD:18 */ VRC5477_IRQ_INTD, /* slot 3 */ /* SLOT: 8, AD:19 */ VRC5477_IRQ_INTE, /* slot 4 */ /* SLOT: 9, AD:20 */ 0xff, /* SLOT: 10, AD:21 */ 0xff, /* SLOT: 11, AD:22 */ 0xff, /* SLOT: 12, AD:23 */ 0xff, /* SLOT: 13, AD:24 */ 0xff, /* SLOT: 14, AD:25 */ 0xff, /* SLOT: 15, AD:26 */ 0xff, /* SLOT: 16, AD:27 */ 0xff, /* SLOT: 17, AD:28 */ 0xff, /* SLOT: 18, AD:29 */ VRC5477_IRQ_IOPCI_INTC, /* vrc5477 ac97 */ /* SLOT: 19, AD:30 */ VRC5477_IRQ_IOPCI_INTB, /* vrc5477 usb peri */ /* SLOT: 20, AD:31 */ VRC5477_IRQ_IOPCI_INTA, /* vrc5477 usb host */ }; static unsigned char rockhopperII_irq_map[MAX_SLOT_NUM] = { /* SLOT: 0, AD:11 */ 0xff, /* SLOT: 1, AD:12 */ VRC5477_IRQ_INTB, /* onboard AMD PCNET */ /* SLOT: 2, AD:13 */ 0xff, /* SLOT: 3, AD:14 */ 0xff, /* SLOT: 4, AD:15 */ 14, /* M5229 ide ISA irq */ /* SLOT: 5, AD:16 */ VRC5477_IRQ_INTD, /* slot 3 */ /* SLOT: 6, AD:17 */ VRC5477_IRQ_INTA, /* slot 4 */ /* SLOT: 7, AD:18 */ VRC5477_IRQ_INTD, /* slot 5 */ /* SLOT: 8, AD:19 */ 0, /* M5457 modem nop */ /* SLOT: 9, AD:20 */ VRC5477_IRQ_INTA, /* slot 2 */ /* SLOT: 10, AD:21 */ 0xff, /* SLOT: 11, AD:22 */ 0xff, /* SLOT: 12, AD:23 */ 0xff, /* SLOT: 13, AD:24 */ 0xff, /* SLOT: 14, AD:25 */ 0xff, /* SLOT: 15, AD:26 */ 0xff, /* SLOT: 16, AD:27 */ 0xff, /* SLOT: 17, AD:28 */ 0, /* M7101 PMU nop */ /* SLOT: 18, AD:29 */ VRC5477_IRQ_IOPCI_INTC, /* vrc5477 ac97 */ /* SLOT: 19, AD:30 */ VRC5477_IRQ_IOPCI_INTB, /* vrc5477 usb peri */ /* SLOT: 20, AD:31 */ VRC5477_IRQ_IOPCI_INTA, /* vrc5477 usb host */ }; int __init pcibios_map_irq(struct pci_dev *dev, u8 slot, u8 pin) { int slot_num; unsigned char *slot_irq_map; unsigned char irq; /* * We ignore the swizzled slot and pin values. The original * pci_fixup_irq() codes largely base irq number on the dev slot * numbers because except for one case they are unique even * though there are multiple pci buses. */ if (mips_machtype == MACH_NEC_ROCKHOPPERII) slot_irq_map = rockhopperII_irq_map; else slot_irq_map = irq_map; slot_num = PCI_SLOT(dev->devfn); irq = slot_irq_map[slot_num]; db_assert(slot_num < MAX_SLOT_NUM); db_assert(irq != 0xff); pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq); if (mips_machtype == MACH_NEC_ROCKHOPPERII) { /* hack to distinquish overlapping slot 20s, one * on bus 0 (ALI USB on the M1535 on the backplane), * and one on bus 2 (NEC USB controller on the CPU board) * Make the M1535 USB - ISA IRQ number 9. */ if (slot_num == 20 && dev->bus->number == 0) { pci_write_config_byte(dev, PCI_INTERRUPT_LINE, 9); irq = 9; } } return irq; } /* Do platform specific device initialization at pci_enable_device() time */ int pcibios_plat_dev_init(struct pci_dev *dev) { return 0; } void ddb_pci_reset_bus(void) { u32 temp; /* * I am not sure about the "official" procedure, the following * steps work as far as I know: * We first set PCI cold reset bit (bit 31) in PCICTRL-H. * Then we clear the PCI warm reset bit (bit 30) to 0 in PCICTRL-H. * The same is true for both PCI channels. */ temp = ddb_in32(DDB_PCICTL0_H); temp |= 0x80000000; ddb_out32(DDB_PCICTL0_H, temp); temp &= ~0xc0000000; ddb_out32(DDB_PCICTL0_H, temp); temp = ddb_in32(DDB_PCICTL1_H); temp |= 0x80000000; ddb_out32(DDB_PCICTL1_H, temp); temp &= ~0xc0000000; ddb_out32(DDB_PCICTL1_H, temp); }