/*
* Copyright (C) Michel Dnzer <michdaen@iiic.ethz.ch>
*
* APUS PCI routines.
*
* Currently, only B/CVisionPPC cards (Permedia2) are supported.
*
* Thanks to Geert Uytterhoeven for the idea:
* Read values from given config space(s) for the first devices, -1 otherwise
*
*/
#ifdef CONFIG_AMIGA
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/string.h>
#include <linux/init.h>
#include <asm/io.h>
#include <asm/pci-bridge.h>
#include <asm/machdep.h>
#include "apus_pci.h"
/* These definitions are mostly adapted from pm2fb.c */
#undef APUS_PCI_MASTER_DEBUG
#ifdef APUS_PCI_MASTER_DEBUG
#define DPRINTK(a,b...) printk(KERN_DEBUG "apus_pci: %s: " a, __FUNCTION__ , ## b)
#else
#define DPRINTK(a,b...)
#endif
/*
* The _DEFINITIVE_ memory mapping/unmapping functions.
* This is due to the fact that they're changing soooo often...
*/
#define DEFW() wmb()
#define DEFR() rmb()
#define DEFRW() mb()
#define DEVNO(d) ((d)>>3)
#define FNNO(d) ((d)&7)
extern unsigned long powerup_PCI_present;
static struct pci_controller *apus_hose;
void *pci_io_base(unsigned int bus)
{
return 0;
}
int
apus_pcibios_read_config(struct pci_bus *bus, int devfn, int offset,
int len, u32 *val)
{
int fnno = FNNO(devfn);
int devno = DEVNO(devfn);
volatile unsigned char *cfg_data;
if (bus->number > 0 || devno != 1) {
*val = ~0;
return PCIBIOS_DEVICE_NOT_FOUND;
}
/* base address + function offset + offset ^ endianness conversion */
/* XXX the fnno<<5 bit seems wacky -- paulus */
cfg_data = apus_hose->cfg_data + (fnno<<5) + (offset ^ (len - 1));
switch (len) {
case 1:
*val = readb(cfg_data);
break;
case 2:
*val = readw(cfg_data);
break;
default:
*val = readl(cfg_data);
break;
}
DPRINTK("read b: 0x%x, d: 0x%x, f: 0x%x, o: 0x%x, l: %d, v: 0x%x\n",
bus->number, devfn>>3, devfn&7, offset, len, *val);
return PCIBIOS_SUCCESSFUL;
}
int
apus_pcibios_write_config(struct pci_bus *bus, int devfn, int offset,
int len, u32 *val)
{
int fnno = FNNO(devfn);
int devno = DEVNO(devfn);
volatile unsigned char *cfg_data;
if (bus->number > 0 || devno != 1) {
return PCIBIOS_DEVICE_NOT_FOUND;
}
/* base address + function offset + offset ^ endianness conversion */
/* XXX the fnno<<5 bit seems wacky -- paulus */
cfg_data = apus_hose->cfg_data + (fnno<<5) + (offset ^ (len - 1));
switch (len) {
case 1:
writeb(val, cfg_data); DEFW();
break;
case 2:
writew(val, cfg_data); DEFW();
break;
default:
writel(val, cfg_data); DEFW();
break;
}
DPRINTK("write b: 0x%x, d: 0x%x, f: 0x%x, o: 0x%x, l: %d, v: 0x%x\n",
bus->number, devfn>>3, devfn&7, offset, len, val);
return PCIBIOS_SUCCESSFUL;
}
static struct pci_ops apus_pci_ops = {
apus_pcibios_read_config,
apus_pcibios_write_config
};
static struct resource pci_mem = { "B/CVisionPPC PCI mem", CVPPC_FB_APERTURE_ONE, CVPPC_PCI_CONFIG, IORESOURCE_MEM };
void __init
apus_pcibios_fixup(void)
{
/* struct pci_dev *dev = pci_find_slot(0, 1<<3);
unsigned int reg, val, offset;*/
/* FIXME: interrupt? */
/*dev->interrupt = xxx;*/
request_resource(&iomem_resource, &pci_mem);
printk("%s: PCI mem resource requested\n", __FUNCTION__);
}
static void __init apus_pcibios_fixup_bus(struct pci_bus *bus)
{
bus->resource[1] = &pci_mem;
}
/*
* This is from pm2fb.c again
*
* Check if PCI (B/CVisionPPC) is available, initialize it and set up
* the pcibios_* pointers
*/
void __init
apus_setup_pci_ptrs(void)
{
if (!powerup_PCI_present) {
DPRINTK("no PCI bridge detected\n");
return;
}
DPRINTK("Phase5 B/CVisionPPC PCI bridge detected.\n");
apus_hose = pcibios_alloc_controller();
if (!apus_hose) {
printk("apus_pci: Can't allocate PCI controller structure\n");
return;
}
if (!(apus_hose->cfg_data = ioremap(CVPPC_PCI_CONFIG, 256))) {
printk("apus_pci: unable to map PCI config region\n");
return;
}
if (!(apus_hose->cfg_addr = ioremap(CSPPC_PCI_BRIDGE, 256))) {
printk("apus_pci: unable to map PCI bridge\n");
return;
}
writel(CSPPCF_BRIDGE_BIG_ENDIAN, apus_hose->cfg_addr + CSPPC_BRIDGE_ENDIAN);
DEFW();
writel(CVPPC_REGS_REGION, apus_hose->cfg_data+ PCI_BASE_ADDRESS_0);
DEFW();
writel(CVPPC_FB_APERTURE_ONE, apus_hose->cfg_data + PCI_BASE_ADDRESS_1);
DEFW();
writel(CVPPC_FB_APERTURE_TWO, apus_hose->cfg_data + PCI_BASE_ADDRESS_2);
DEFW();
writel(CVPPC_ROM_ADDRESS, apus_hose->cfg_data + PCI_ROM_ADDRESS);
DEFW();
writel(0xef000000 | PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
PCI_COMMAND_MASTER, apus_hose->cfg_data + PCI_COMMAND);
DEFW();
apus_hose->first_busno = 0;
apus_hose->last_busno = 0;
apus_hose->ops = &apus_pci_ops;
ppc_md.pcibios_fixup = apus_pcibios_fixup;
ppc_md.pcibios_fixup_bus = apus_pcibios_fixup_bus;
return;
}
#endif /* CONFIG_AMIGA */
