apus_pci.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:5k
- /*
- * BK Id: %F% %I% %G% %U% %#%
- */
- /*
- * Copyright (C) Michel D鋘zer <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
- *
- */
- #include <linux/config.h>
- #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;
- }
- #define cfg_read(val, addr, type, op) *val = op((type)(addr))
- #define cfg_write(val, addr, type, op) op((val), (type *)(addr)); DEFW()
- #define cfg_read_bad *val = ~0;
- #define cfg_write_bad ;
- #define cfg_read_val(val) *val
- #define cfg_write_val(val) val
- #define APUS_PCI_OP(rw, size, type, op, mask)
- int
- apus_pcibios_##rw##_config_##size(struct pci_dev *dev, int offset, type val)
- {
- int fnno = FNNO(dev->devfn);
- int devno = DEVNO(dev->devfn);
-
- if (dev->bus->number > 0 || devno != 1) {
- cfg_##rw##_bad;
- return PCIBIOS_DEVICE_NOT_FOUND;
- }
- /* base address + function offset + offset ^ endianness conversion */
- cfg_##rw(val, apus_hose->cfg_data + (fnno<<5) + (offset ^ mask),
- type, op);
-
- DPRINTK(#op " b: 0x%x, d: 0x%x, f: 0x%x, o: 0x%x, v: 0x%xn",
- dev->bus->number, dev->devfn>>3, dev->devfn&7,
- offset, cfg_##rw##_val(val));
- return PCIBIOS_SUCCESSFUL;
- }
- APUS_PCI_OP(read, byte, u8 *, readb, 3)
- APUS_PCI_OP(read, word, u16 *, readw, 2)
- APUS_PCI_OP(read, dword, u32 *, readl, 0)
- APUS_PCI_OP(write, byte, u8, writeb, 3)
- APUS_PCI_OP(write, word, u16, writew, 2)
- APUS_PCI_OP(write, dword, u32, writel, 0)
- static struct pci_ops apus_pci_ops = {
- apus_pcibios_read_config_byte,
- apus_pcibios_read_config_word,
- apus_pcibios_read_config_dword,
- apus_pcibios_write_config_byte,
- apus_pcibios_write_config_word,
- apus_pcibios_write_config_dword
- };
- 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 requestedn", __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 detectedn");
- 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 structuren");
- return;
- }
- if (!(apus_hose->cfg_data = ioremap(CVPPC_PCI_CONFIG, 256))) {
- printk("apus_pci: unable to map PCI config regionn");
- return;
- }
- if (!(apus_hose->cfg_addr = ioremap(CSPPC_PCI_BRIDGE, 256))) {
- printk("apus_pci: unable to map PCI bridgen");
- 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 */