![Ralf Baechle](/assets/img/avatar_default.png)
Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
90 lines
2.5 KiB
C
90 lines
2.5 KiB
C
/*
|
|
* 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;
|
|
}
|