| /* |
| * This file is subject to the terms and conditions of the GNU General Public |
| * License. See the file "COPYING" in the main directory of this archive |
| * for more details. |
| * |
| * SNI specific PCI support for RM200/RM300. |
| * |
| * Copyright (C) 1997 - 2000, 2003, 04 Ralf Baechle (ralf@linux-mips.org) |
| */ |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/pci.h> |
| |
| #include <asm/mipsregs.h> |
| #include <asm/sni.h> |
| |
| /* |
| * Shortcuts ... |
| */ |
| #define SCSI PCIMT_IRQ_SCSI |
| #define ETH PCIMT_IRQ_ETHERNET |
| #define INTA PCIMT_IRQ_INTA |
| #define INTB PCIMT_IRQ_INTB |
| #define INTC PCIMT_IRQ_INTC |
| #define INTD PCIMT_IRQ_INTD |
| |
| /* |
| * Device 0: PCI EISA Bridge (directly routed) |
| * Device 1: NCR53c810 SCSI (directly routed) |
| * Device 2: PCnet32 Ethernet (directly routed) |
| * Device 3: VGA (routed to INTB) |
| * Device 4: Unused |
| * Device 5: Slot 2 |
| * Device 6: Slot 3 |
| * Device 7: Slot 4 |
| * |
| * Documentation says the VGA is device 5 and device 3 is unused but that |
| * seem to be a documentation error. At least on my RM200C the Cirrus |
| * Logic CL-GD5434 VGA is device 3. |
| */ |
| static char irq_tab_rm200[8][5] __initdata = { |
| /* INTA INTB INTC INTD */ |
| { 0, 0, 0, 0, 0 }, /* EISA bridge */ |
| { SCSI, SCSI, SCSI, SCSI, SCSI }, /* SCSI */ |
| { ETH, ETH, ETH, ETH, ETH }, /* Ethernet */ |
| { INTB, INTB, INTB, INTB, INTB }, /* VGA */ |
| { 0, 0, 0, 0, 0 }, /* Unused */ |
| { 0, INTB, INTC, INTD, INTA }, /* Slot 2 */ |
| { 0, INTC, INTD, INTA, INTB }, /* Slot 3 */ |
| { 0, INTD, INTA, INTB, INTC }, /* Slot 4 */ |
| }; |
| |
| /* |
| * In Revision D of the RM300 Device 2 has become a normal purpose Slot 1 |
| * |
| * The VGA card is optional for RM300 systems. |
| */ |
| static char irq_tab_rm300d[8][5] __initdata = { |
| /* INTA INTB INTC INTD */ |
| { 0, 0, 0, 0, 0 }, /* EISA bridge */ |
| { SCSI, SCSI, SCSI, SCSI, SCSI }, /* SCSI */ |
| { 0, INTC, INTD, INTA, INTB }, /* Slot 1 */ |
| { INTB, INTB, INTB, INTB, INTB }, /* VGA */ |
| { 0, 0, 0, 0, 0 }, /* Unused */ |
| { 0, INTB, INTC, INTD, INTA }, /* Slot 2 */ |
| { 0, INTC, INTD, INTA, INTB }, /* Slot 3 */ |
| { 0, INTD, INTA, INTB, INTC }, /* Slot 4 */ |
| }; |
| |
| static inline int is_rm300_revd(void) |
| { |
| unsigned char csmsr = *(volatile unsigned char *)PCIMT_CSMSR; |
| |
| return (csmsr & 0xa0) == 0x20; |
| } |
| |
| int __init pcibios_map_irq(struct pci_dev *dev, u8 slot, u8 pin) |
| { |
| if (is_rm300_revd()) |
| return irq_tab_rm300d[slot][pin]; |
| |
| return irq_tab_rm200[slot][pin]; |
| } |
| |
| /* Do platform specific device initialization at pci_enable_device() time */ |
| int pcibios_plat_dev_init(struct pci_dev *dev) |
| { |
| return 0; |
| } |