pci.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:7k
- /*
- * PCI code for DDB5477.
- *
- * Copyright (C) 2001 MontaVista Software Inc.
- * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
- *
- * 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/types.h>
- #include <linux/pci.h>
- #include <asm/bootinfo.h>
- #include <asm/pci_channel.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_channel mips_pci_channels[] = {
- { &ddb5477_ext_pci_ops, &extpci_io_resource, &extpci_mem_resource },
- { &ddb5477_io_pci_ops, &iopci_io_resource, &iopci_mem_resource },
- { NULL, NULL, NULL}
- };
- /*
- * 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 */
- };
- void __init pcibios_fixup_irqs(void)
- {
- struct pci_dev *dev;
- int slot_num;
- unsigned char *slot_irq_map;
- unsigned char irq;
- if (mips_machtype == MACH_NEC_ROCKHOPPERII)
- slot_irq_map = rockhopperII_irq_map;
- else
- slot_irq_map = irq_map;
- pci_for_each_dev(dev) {
- 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);
- dev->irq = 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);
- dev->irq = 9;
- }
- }
- }
- }
- #if defined(CONFIG_DEBUG)
- extern void jsun_scan_pci_bus(void);
- extern void jsun_assign_pci_resource(void);
- #endif
- 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);
- }
- unsigned __init int pcibios_assign_all_busses(void)
- {
- /* we hope pci_auto has assigned the bus numbers to all buses */
- return 1;
- }
- void __init pcibios_fixup_resources(struct pci_dev *dev)
- {
- }
- void __init pcibios_fixup(void)
- {
- if (mips_machtype == MACH_NEC_ROCKHOPPERII) {
- struct pci_dev *dev;
- #define M1535_CONFIG_PORT 0x3f0
- #define M1535_INDEX_PORT 0x3f0
- #define M1535_DATA_PORT 0x3f1
- printk("Configuring ALI M1535 Super I/O mouse irq.n");
- request_region(M1535_CONFIG_PORT, 2, "M1535 Super I/O config");
- /* Enter config mode. */
- outb(0x51, M1535_CONFIG_PORT);
- outb(0x23, M1535_CONFIG_PORT);
- /* Select device 0x07. */
- outb(0x07, M1535_INDEX_PORT);
- outb(0x07, M1535_DATA_PORT);
- /* Set mouse irq (register 0x72) to 12. */
- outb(0x72, M1535_INDEX_PORT);
- outb(0x0c, M1535_DATA_PORT);
- /* Exit config mode. */
- outb(0xbb, M1535_CONFIG_PORT);
- pci_for_each_dev(dev) {
- if(dev->vendor == PCI_VENDOR_ID_AL)
- if(dev->device == PCI_DEVICE_ID_AL_M1535
- || dev->device == PCI_DEVICE_ID_AL_M1533) {
- u8 old;
- printk("Enabling ALI M1533/35 PS2 keyboard/mouse.n");
- pci_read_config_byte(dev, 0x41, &old);
- pci_write_config_byte(dev, 0x41, old | 0xd0);
- }
- }
- }
- }