pci-visws.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:3k
- /*
- * Low-Level PCI Support for SGI Visual Workstation
- *
- * (c) 1999--2000 Martin Mares <mj@ucw.cz>
- */
- #include <linux/config.h>
- #include <linux/types.h>
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <linux/pci.h>
- #include <linux/init.h>
- #include <linux/irq.h>
- #include <asm/smp.h>
- #include <asm/lithium.h>
- #include <asm/io.h>
- #include "pci-i386.h"
- unsigned int pci_probe = 0;
- /*
- * The VISWS uses configuration access type 1 only.
- */
- #define CONFIG_CMD(dev, where) (0x80000000 | (dev->bus->number << 16) | (dev->devfn << 8) | (where & ~3))
- static int pci_conf1_read_config_byte(struct pci_dev *dev, int where, u8 *value)
- {
- outl(CONFIG_CMD(dev,where), 0xCF8);
- *value = inb(0xCFC + (where&3));
- return PCIBIOS_SUCCESSFUL;
- }
- static int pci_conf1_read_config_word(struct pci_dev *dev, int where, u16 *value)
- {
- outl(CONFIG_CMD(dev,where), 0xCF8);
- *value = inw(0xCFC + (where&2));
- return PCIBIOS_SUCCESSFUL;
- }
- static int pci_conf1_read_config_dword(struct pci_dev *dev, int where, u32 *value)
- {
- outl(CONFIG_CMD(dev,where), 0xCF8);
- *value = inl(0xCFC);
- return PCIBIOS_SUCCESSFUL;
- }
- static int pci_conf1_write_config_byte(struct pci_dev *dev, int where, u8 value)
- {
- outl(CONFIG_CMD(dev,where), 0xCF8);
- outb(value, 0xCFC + (where&3));
- return PCIBIOS_SUCCESSFUL;
- }
- static int pci_conf1_write_config_word(struct pci_dev *dev, int where, u16 value)
- {
- outl(CONFIG_CMD(dev,where), 0xCF8);
- outw(value, 0xCFC + (where&2));
- return PCIBIOS_SUCCESSFUL;
- }
- static int pci_conf1_write_config_dword(struct pci_dev *dev, int where, u32 value)
- {
- outl(CONFIG_CMD(dev,where), 0xCF8);
- outl(value, 0xCFC);
- return PCIBIOS_SUCCESSFUL;
- }
- #undef CONFIG_CMD
- static struct pci_ops visws_pci_ops = {
- pci_conf1_read_config_byte,
- pci_conf1_read_config_word,
- pci_conf1_read_config_dword,
- pci_conf1_write_config_byte,
- pci_conf1_write_config_word,
- pci_conf1_write_config_dword
- };
- static void __init pcibios_fixup_irqs(void)
- {
- struct pci_dev *dev, *p;
- u8 pin;
- int irq;
- pci_for_each_dev(dev) {
- pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
- dev->irq = 0;
- if (!pin)
- continue;
- pin--;
- if (dev->bus->parent) {
- p = dev->bus->parent->self;
- pin = (pin + PCI_SLOT(dev->devfn)) % 4;
- } else
- p = dev;
- irq = visws_get_PCI_irq_vector(p->bus->number, PCI_SLOT(p->devfn), pin+1);
- if (irq >= 0)
- dev->irq = irq;
- DBG("PCI IRQ: %s pin %d -> %dn", dev->slot_name, pin, irq);
- }
- }
- void __init pcibios_fixup_bus(struct pci_bus *b)
- {
- pci_read_bridge_bases(b);
- }
- #if 0
- static struct resource visws_pci_bus_resources[2] = {
- { "Host bus 1", 0xf4000000, 0xf7ffffff, 0 },
- { "Host bus 2", 0xf0000000, 0xf3ffffff, 0 }
- };
- #endif
- void __init pcibios_init(void)
- {
- unsigned int sec_bus = li_pcib_read16(LI_PCI_BUSNUM) & 0xff;
- printk("PCI: Probing PCI hardware on host buses 00 and %02xn", sec_bus);
- pci_scan_bus(0, &visws_pci_ops, NULL);
- pci_scan_bus(sec_bus, &visws_pci_ops, NULL);
- pcibios_fixup_irqs();
- pcibios_resource_survey();
- }
- char * __init pcibios_setup(char *str)
- {
- return str;
- }
- int pcibios_enable_device(struct pci_dev *dev)
- {
- return pcibios_enable_resources(dev);
- }
- void __init pcibios_penalize_isa_irq(irq)
- {
- }