2 * Copyright (C) Michel Dänzer <michdaen@iiic.ethz.ch>
6 * Currently, only B/CVisionPPC cards (Permedia2) are supported.
8 * Thanks to Geert Uytterhoeven for the idea:
9 * Read values from given config space(s) for the first devices, -1 otherwise
15 #include <linux/kernel.h>
16 #include <linux/pci.h>
17 #include <linux/delay.h>
18 #include <linux/string.h>
19 #include <linux/init.h>
22 #include <asm/pci-bridge.h>
23 #include <asm/machdep.h>
28 /* These definitions are mostly adapted from pm2fb.c */
30 #undef APUS_PCI_MASTER_DEBUG
31 #ifdef APUS_PCI_MASTER_DEBUG
32 #define DPRINTK(a,b...) printk(KERN_DEBUG "apus_pci: %s: " a, __FUNCTION__ , ## b)
34 #define DPRINTK(a,b...)
38 * The _DEFINITIVE_ memory mapping/unmapping functions.
39 * This is due to the fact that they're changing soooo often...
45 #define DEVNO(d) ((d)>>3)
46 #define FNNO(d) ((d)&7)
49 extern unsigned long powerup_PCI_present;
51 static struct pci_controller *apus_hose;
54 void *pci_io_base(unsigned int bus)
61 apus_pcibios_read_config(struct pci_bus *bus, int devfn, int offset,
64 int fnno = FNNO(devfn);
65 int devno = DEVNO(devfn);
66 volatile unsigned char *cfg_data;
68 if (bus->number > 0 || devno != 1) {
70 return PCIBIOS_DEVICE_NOT_FOUND;
72 /* base address + function offset + offset ^ endianness conversion */
73 /* XXX the fnno<<5 bit seems wacky -- paulus */
74 cfg_data = apus_hose->cfg_data + (fnno<<5) + (offset ^ (len - 1));
77 *val = readb(cfg_data);
80 *val = readw(cfg_data);
83 *val = readl(cfg_data);
87 DPRINTK("read b: 0x%x, d: 0x%x, f: 0x%x, o: 0x%x, l: %d, v: 0x%x\n",
88 bus->number, devfn>>3, devfn&7, offset, len, *val);
89 return PCIBIOS_SUCCESSFUL;
93 apus_pcibios_write_config(struct pci_bus *bus, int devfn, int offset,
96 int fnno = FNNO(devfn);
97 int devno = DEVNO(devfn);
98 volatile unsigned char *cfg_data;
100 if (bus->number > 0 || devno != 1) {
101 return PCIBIOS_DEVICE_NOT_FOUND;
103 /* base address + function offset + offset ^ endianness conversion */
104 /* XXX the fnno<<5 bit seems wacky -- paulus */
105 cfg_data = apus_hose->cfg_data + (fnno<<5) + (offset ^ (len - 1));
108 writeb(val, cfg_data); DEFW();
111 writew(val, cfg_data); DEFW();
114 writel(val, cfg_data); DEFW();
118 DPRINTK("write b: 0x%x, d: 0x%x, f: 0x%x, o: 0x%x, l: %d, v: 0x%x\n",
119 bus->number, devfn>>3, devfn&7, offset, len, val);
120 return PCIBIOS_SUCCESSFUL;
123 static struct pci_ops apus_pci_ops = {
124 apus_pcibios_read_config,
125 apus_pcibios_write_config
128 static struct resource pci_mem = { "B/CVisionPPC PCI mem", CVPPC_FB_APERTURE_ONE, CVPPC_PCI_CONFIG, IORESOURCE_MEM };
131 apus_pcibios_fixup(void)
133 /* struct pci_dev *dev = pci_find_slot(0, 1<<3);
134 unsigned int reg, val, offset;*/
136 /* FIXME: interrupt? */
137 /*dev->interrupt = xxx;*/
139 request_resource(&iomem_resource, &pci_mem);
140 printk("%s: PCI mem resource requested\n", __FUNCTION__);
143 static void __init apus_pcibios_fixup_bus(struct pci_bus *bus)
145 bus->resource[1] = &pci_mem;
150 * This is from pm2fb.c again
152 * Check if PCI (B/CVisionPPC) is available, initialize it and set up
153 * the pcibios_* pointers
158 apus_setup_pci_ptrs(void)
160 if (!powerup_PCI_present) {
161 DPRINTK("no PCI bridge detected\n");
164 DPRINTK("Phase5 B/CVisionPPC PCI bridge detected.\n");
166 apus_hose = pcibios_alloc_controller();
168 printk("apus_pci: Can't allocate PCI controller structure\n");
172 if (!(apus_hose->cfg_data = ioremap(CVPPC_PCI_CONFIG, 256))) {
173 printk("apus_pci: unable to map PCI config region\n");
177 if (!(apus_hose->cfg_addr = ioremap(CSPPC_PCI_BRIDGE, 256))) {
178 printk("apus_pci: unable to map PCI bridge\n");
182 writel(CSPPCF_BRIDGE_BIG_ENDIAN, apus_hose->cfg_addr + CSPPC_BRIDGE_ENDIAN);
185 writel(CVPPC_REGS_REGION, apus_hose->cfg_data+ PCI_BASE_ADDRESS_0);
187 writel(CVPPC_FB_APERTURE_ONE, apus_hose->cfg_data + PCI_BASE_ADDRESS_1);
189 writel(CVPPC_FB_APERTURE_TWO, apus_hose->cfg_data + PCI_BASE_ADDRESS_2);
191 writel(CVPPC_ROM_ADDRESS, apus_hose->cfg_data + PCI_ROM_ADDRESS);
194 writel(0xef000000 | PCI_COMMAND_IO | PCI_COMMAND_MEMORY |
195 PCI_COMMAND_MASTER, apus_hose->cfg_data + PCI_COMMAND);
198 apus_hose->first_busno = 0;
199 apus_hose->last_busno = 0;
200 apus_hose->ops = &apus_pci_ops;
201 ppc_md.pcibios_fixup = apus_pcibios_fixup;
202 ppc_md.pcibios_fixup_bus = apus_pcibios_fixup_bus;
207 #endif /* CONFIG_AMIGA */