/* * 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> #include <irq.h> /* * PCIMT 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 char irq_tab_rm300e[5][5] __initdata = { /* INTA INTB INTC INTD */ { 0, 0, 0, 0, 0 }, /* HOST bridge */ { SCSI, SCSI, SCSI, SCSI, SCSI }, /* SCSI */ { 0, INTC, INTD, INTA, INTB }, /* Bridge/i960 */ { 0, INTD, INTA, INTB, INTC }, /* Slot 1 */ { 0, INTA, INTB, INTC, INTD }, /* Slot 2 */ }; #undef SCSI #undef ETH #undef INTA #undef INTB #undef INTC #undef INTD /* * PCIT Shortcuts ... */ #define SCSI0 PCIT_IRQ_SCSI0 #define SCSI1 PCIT_IRQ_SCSI1 #define ETH PCIT_IRQ_ETHERNET #define INTA PCIT_IRQ_INTA #define INTB PCIT_IRQ_INTB #define INTC PCIT_IRQ_INTC #define INTD PCIT_IRQ_INTD static char irq_tab_pcit[13][5] __initdata = { /* INTA INTB INTC INTD */ { 0, 0, 0, 0, 0 }, /* HOST bridge */ { SCSI0, SCSI0, SCSI0, SCSI0, SCSI0 }, /* SCSI */ { SCSI1, SCSI1, SCSI1, SCSI1, SCSI1 }, /* SCSI */ { ETH, ETH, ETH, ETH, ETH }, /* Ethernet */ { 0, INTA, INTB, INTC, INTD }, /* PCI-PCI bridge */ { 0, 0, 0, 0, 0 }, /* Unused */ { 0, 0, 0, 0, 0 }, /* Unused */ { 0, 0, 0, 0, 0 }, /* Unused */ { 0, INTA, INTB, INTC, INTD }, /* Slot 1 */ { 0, INTB, INTC, INTD, INTA }, /* Slot 2 */ { 0, INTC, INTD, INTA, INTB }, /* Slot 3 */ { 0, INTD, INTA, INTB, INTC }, /* Slot 4 */ { 0, INTA, INTB, INTC, INTD }, /* Slot 5 */ }; static char irq_tab_pcit_cplus[13][5] __initdata = { /* INTA INTB INTC INTD */ { 0, 0, 0, 0, 0 }, /* HOST bridge */ { 0, INTB, INTC, INTD, INTA }, /* PCI Slot 9 */ { 0, 0, 0, 0, 0 }, /* PCI-EISA */ { 0, 0, 0, 0, 0 }, /* Unused */ { 0, INTA, INTB, INTC, INTD }, /* PCI-PCI bridge */ { 0, INTB, INTC, INTD, INTA }, /* fixup */ }; static inline int is_rm300_revd(void) { unsigned char csmsr = *(volatile unsigned char *)PCIMT_CSMSR; return (csmsr & 0xa0) == 0x20; } int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) { switch (sni_brd_type) { case SNI_BRD_PCI_TOWER_CPLUS: if (slot == 4) { /* * SNI messed up interrupt wiring for onboard * PCI bus 1; we need to fix this up here */ while (dev && dev->bus->number != 1) dev = dev->bus->self; if (dev && dev->devfn >= PCI_DEVFN(4, 0)) slot = 5; } return irq_tab_pcit_cplus[slot][pin]; case SNI_BRD_PCI_TOWER: return irq_tab_pcit[slot][pin]; case SNI_BRD_PCI_MTOWER: if (is_rm300_revd()) return irq_tab_rm300d[slot][pin]; /* fall through */ case SNI_BRD_PCI_DESKTOP: return irq_tab_rm200[slot][pin]; case SNI_BRD_PCI_MTOWER_CPLUS: return irq_tab_rm300e[slot][pin]; } return 0; } /* Do platform specific device initialization at pci_enable_device() time */ int pcibios_plat_dev_init(struct pci_dev *dev) { return 0; }