pci.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:3k
- #include <linux/config.h>
- #include <linux/kernel.h>
- #include <linux/init.h>
- #include <linux/types.h>
- #include <linux/pci.h>
- #include <asm/pci_channel.h>
- #include <asm/debug.h>
- #include <asm/ddb5xxx/ddb5xxx.h>
- static struct resource extpci_io_resource = {
- "pci IO space",
- 0x1000, /* leave some room for ISA bus */
- DDB_PCI_IO_SIZE -1,
- IORESOURCE_IO};
- static struct resource extpci_mem_resource = {
- "pci memory space",
- DDB_PCI_MEM_BASE + 0x00100000, /* leave 1 MB for RTC */
- DDB_PCI_MEM_BASE + DDB_PCI_MEM_SIZE -1,
- IORESOURCE_MEM};
- extern struct pci_ops ddb5476_ext_pci_ops;
- struct pci_channel mips_pci_channels[] = {
- { &ddb5476_ext_pci_ops, &extpci_io_resource, &extpci_mem_resource },
- { NULL, NULL, NULL}
- };
- /*
- * we fix up irqs based on the slot number.
- * The first entry is at AD:11.
- *
- * This does not work for devices on sub-buses yet.
- */
- /*
- * temporary
- */
- #define PCI_EXT_INTA 8
- #define PCI_EXT_INTB 9
- #define PCI_EXT_INTC 10
- #define PCI_EXT_INTD 11
- #define PCI_EXT_INTE 12
- /*
- * 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 */ 9, /* USB */
- /* SLOT: 3, AD:14 */ 10, /* PMU */
- /* SLOT: 4, AD:15 */ 0xff,
- /* SLOT: 5, AD:16 */ 0x0, /* P2P bridge */
- /* SLOT: 6, AD:17 */ nile4_to_irq(PCI_EXT_INTB),
- /* SLOT: 7, AD:18 */ nile4_to_irq(PCI_EXT_INTC),
- /* SLOT: 8, AD:19 */ nile4_to_irq(PCI_EXT_INTD),
- /* SLOT: 9, AD:20 */ nile4_to_irq(PCI_EXT_INTA),
- /* SLOT: 10, AD:21 */ 0xff,
- /* SLOT: 11, AD:22 */ 0xff,
- /* SLOT: 12, AD:23 */ 0xff,
- /* SLOT: 13, AD:24 */ 14, /* HD controller, M5229 */
- /* SLOT: 14, AD:25 */ 0xff,
- /* SLOT: 15, AD:26 */ 0xff,
- /* SLOT: 16, AD:27 */ 0xff,
- /* SLOT: 17, AD:28 */ 0xff,
- /* SLOT: 18, AD:29 */ 0xff,
- /* SLOT: 19, AD:30 */ 0xff,
- /* SLOT: 20, AD:31 */ 0xff
- };
- extern int vrc5477_irq_to_irq(int irq);
- void __init pcibios_fixup_irqs(void)
- {
- struct pci_dev *dev;
- int slot_num;
- pci_for_each_dev(dev) {
- slot_num = PCI_SLOT(dev->devfn);
- /* we don't do IRQ fixup for sub-bus yet */
- if (dev->bus->parent != NULL) {
- db_run(printk("Don't know how to fixup irq for PCI device %d on sub-bus %dn",
- slot_num, dev->bus->number));
- continue;
- }
- db_assert(slot_num < MAX_SLOT_NUM);
- db_assert(irq_map[slot_num] != 0xff);
- pci_write_config_byte(dev,
- PCI_INTERRUPT_LINE,
- irq_map[slot_num]);
- dev->irq = irq_map[slot_num];
- }
- }
- #if defined(CONFIG_DEBUG)
- extern void jsun_scan_pci_bus(void);
- #endif
- void __init 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_PCICTRL+4);
- temp |= 0x80000000;
- ddb_out32(DDB_PCICTRL+4, temp);
- temp &= ~0xc0000000;
- ddb_out32(DDB_PCICTRL+4, 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)
- {
- }