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169 lines
4.8 KiB
169 lines
4.8 KiB
/* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file "COPYING" in the main directory of this archive |
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* for more details. |
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* |
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* SNI specific PCI support for RM200/RM300. |
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* |
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* Copyright (C) 1997 - 2000, 2003, 04 Ralf Baechle ([email protected]) |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/init.h> |
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#include <linux/pci.h> |
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#include <asm/mipsregs.h> |
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#include <asm/sni.h> |
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#include <irq.h> |
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/* |
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* PCIMT Shortcuts ... |
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*/ |
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#define SCSI PCIMT_IRQ_SCSI |
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#define ETH PCIMT_IRQ_ETHERNET |
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#define INTA PCIMT_IRQ_INTA |
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#define INTB PCIMT_IRQ_INTB |
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#define INTC PCIMT_IRQ_INTC |
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#define INTD PCIMT_IRQ_INTD |
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/* |
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* Device 0: PCI EISA Bridge (directly routed) |
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* Device 1: NCR53c810 SCSI (directly routed) |
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* Device 2: PCnet32 Ethernet (directly routed) |
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* Device 3: VGA (routed to INTB) |
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* Device 4: Unused |
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* Device 5: Slot 2 |
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* Device 6: Slot 3 |
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* Device 7: Slot 4 |
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* |
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* Documentation says the VGA is device 5 and device 3 is unused but that |
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* seem to be a documentation error. At least on my RM200C the Cirrus |
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* Logic CL-GD5434 VGA is device 3. |
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*/ |
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static char irq_tab_rm200[8][5] = { |
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/* INTA INTB INTC INTD */ |
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{ 0, 0, 0, 0, 0 }, /* EISA bridge */ |
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{ SCSI, SCSI, SCSI, SCSI, SCSI }, /* SCSI */ |
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{ ETH, ETH, ETH, ETH, ETH }, /* Ethernet */ |
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{ INTB, INTB, INTB, INTB, INTB }, /* VGA */ |
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{ 0, 0, 0, 0, 0 }, /* Unused */ |
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{ 0, INTB, INTC, INTD, INTA }, /* Slot 2 */ |
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{ 0, INTC, INTD, INTA, INTB }, /* Slot 3 */ |
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{ 0, INTD, INTA, INTB, INTC }, /* Slot 4 */ |
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}; |
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/* |
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* In Revision D of the RM300 Device 2 has become a normal purpose Slot 1 |
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* |
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* The VGA card is optional for RM300 systems. |
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*/ |
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static char irq_tab_rm300d[8][5] = { |
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/* INTA INTB INTC INTD */ |
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{ 0, 0, 0, 0, 0 }, /* EISA bridge */ |
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{ SCSI, SCSI, SCSI, SCSI, SCSI }, /* SCSI */ |
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{ 0, INTC, INTD, INTA, INTB }, /* Slot 1 */ |
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{ INTB, INTB, INTB, INTB, INTB }, /* VGA */ |
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{ 0, 0, 0, 0, 0 }, /* Unused */ |
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{ 0, INTB, INTC, INTD, INTA }, /* Slot 2 */ |
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{ 0, INTC, INTD, INTA, INTB }, /* Slot 3 */ |
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{ 0, INTD, INTA, INTB, INTC }, /* Slot 4 */ |
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}; |
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static char irq_tab_rm300e[5][5] = { |
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/* INTA INTB INTC INTD */ |
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{ 0, 0, 0, 0, 0 }, /* HOST bridge */ |
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{ SCSI, SCSI, SCSI, SCSI, SCSI }, /* SCSI */ |
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{ 0, INTC, INTD, INTA, INTB }, /* Bridge/i960 */ |
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{ 0, INTD, INTA, INTB, INTC }, /* Slot 1 */ |
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{ 0, INTA, INTB, INTC, INTD }, /* Slot 2 */ |
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}; |
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#undef SCSI |
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#undef ETH |
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#undef INTA |
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#undef INTB |
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#undef INTC |
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#undef INTD |
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/* |
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* PCIT Shortcuts ... |
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*/ |
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#define SCSI0 PCIT_IRQ_SCSI0 |
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#define SCSI1 PCIT_IRQ_SCSI1 |
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#define ETH PCIT_IRQ_ETHERNET |
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#define INTA PCIT_IRQ_INTA |
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#define INTB PCIT_IRQ_INTB |
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#define INTC PCIT_IRQ_INTC |
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#define INTD PCIT_IRQ_INTD |
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static char irq_tab_pcit[13][5] = { |
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/* INTA INTB INTC INTD */ |
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{ 0, 0, 0, 0, 0 }, /* HOST bridge */ |
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{ SCSI0, SCSI0, SCSI0, SCSI0, SCSI0 }, /* SCSI */ |
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{ SCSI1, SCSI1, SCSI1, SCSI1, SCSI1 }, /* SCSI */ |
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{ ETH, ETH, ETH, ETH, ETH }, /* Ethernet */ |
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{ 0, INTA, INTB, INTC, INTD }, /* PCI-PCI bridge */ |
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{ 0, 0, 0, 0, 0 }, /* Unused */ |
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{ 0, 0, 0, 0, 0 }, /* Unused */ |
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{ 0, 0, 0, 0, 0 }, /* Unused */ |
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{ 0, INTA, INTB, INTC, INTD }, /* Slot 1 */ |
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{ 0, INTB, INTC, INTD, INTA }, /* Slot 2 */ |
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{ 0, INTC, INTD, INTA, INTB }, /* Slot 3 */ |
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{ 0, INTD, INTA, INTB, INTC }, /* Slot 4 */ |
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{ 0, INTA, INTB, INTC, INTD }, /* Slot 5 */ |
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}; |
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static char irq_tab_pcit_cplus[13][5] = { |
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/* INTA INTB INTC INTD */ |
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{ 0, 0, 0, 0, 0 }, /* HOST bridge */ |
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{ 0, INTB, INTC, INTD, INTA }, /* PCI Slot 9 */ |
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{ 0, 0, 0, 0, 0 }, /* PCI-EISA */ |
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{ 0, 0, 0, 0, 0 }, /* Unused */ |
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{ 0, INTA, INTB, INTC, INTD }, /* PCI-PCI bridge */ |
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{ 0, INTB, INTC, INTD, INTA }, /* fixup */ |
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}; |
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static inline int is_rm300_revd(void) |
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{ |
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unsigned char csmsr = *(volatile unsigned char *)PCIMT_CSMSR; |
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return (csmsr & 0xa0) == 0x20; |
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} |
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int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) |
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{ |
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switch (sni_brd_type) { |
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case SNI_BRD_PCI_TOWER_CPLUS: |
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if (slot == 4) { |
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/* |
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* SNI messed up interrupt wiring for onboard |
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* PCI bus 1; we need to fix this up here |
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*/ |
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while (dev && dev->bus->number != 1) |
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dev = dev->bus->self; |
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if (dev && dev->devfn >= PCI_DEVFN(4, 0)) |
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slot = 5; |
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} |
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return irq_tab_pcit_cplus[slot][pin]; |
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case SNI_BRD_PCI_TOWER: |
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return irq_tab_pcit[slot][pin]; |
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case SNI_BRD_PCI_MTOWER: |
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if (is_rm300_revd()) |
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return irq_tab_rm300d[slot][pin]; |
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fallthrough; |
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case SNI_BRD_PCI_DESKTOP: |
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return irq_tab_rm200[slot][pin]; |
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case SNI_BRD_PCI_MTOWER_CPLUS: |
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return irq_tab_rm300e[slot][pin]; |
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} |
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return 0; |
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} |
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/* Do platform specific device initialization at pci_enable_device() time */ |
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int pcibios_plat_dev_init(struct pci_dev *dev) |
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{ |
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return 0; |
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}
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