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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 | /* $Id: pci.c,v 1.7 1999/01/04 16:03:58 ralf Exp $ * * 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, 1998 Ralf Baechle */ #include <linux/config.h> #include <linux/kernel.h> #include <linux/pci.h> #include <linux/types.h> #include <asm/byteorder.h> #include <asm/pci.h> #include <asm/sni.h> #ifdef CONFIG_PCI #define mkaddr(bus, dev_fn, where) \ do { \ if (bus == 0 && dev_fn >= PCI_DEVFN(8, 0)) \ return -1; \ *(volatile u32 *)PCIMT_CONFIG_ADDRESS = ((bus & 0xff) << 0x10) | \ ((dev_fn & 0xff) << 0x08) | \ (where & 0xfc); \ } while(0); static void sni_rm200_pcibios_fixup (void) { struct pci_dev *dev; for (dev=pci_devices; dev; dev=dev->next) { /* * TODO: Take care of RM300 revision D boards for where the * network slot became an ordinary PCI slot. */ if (dev->devfn == PCI_DEVFN(1, 0)) { /* Evil hack ... */ set_cp0_config(CONF_CM_CMASK, CONF_CM_CACHABLE_NO_WA); dev->irq = PCIMT_IRQ_SCSI; continue; } if (dev->devfn == PCI_DEVFN(2, 0)) { dev->irq = PCIMT_IRQ_ETHERNET; continue; } switch(dev->irq) { case 1 ... 4: dev->irq += PCIMT_IRQ_INTA - 1; break; case 0: break; default: printk("PCI device on bus %d, dev %d, function %d " "impossible interrupt configured.\n", dev->bus->number, PCI_SLOT(dev->devfn), PCI_SLOT(dev->devfn)); } } } /* * We can't address 8 and 16 bit words directly. Instead we have to * read/write a 32bit word and mask/modify the data we actually want. */ static int sni_rm200_pcibios_read_config_byte (unsigned char bus, unsigned char dev_fn, unsigned char where, unsigned char *val) { u32 res; mkaddr(bus, dev_fn, where); res = *(volatile u32 *)PCIMT_CONFIG_DATA; res = (le32_to_cpu(res) >> ((where & 3) << 3)) & 0xff; *val = res; return PCIBIOS_SUCCESSFUL; } static int sni_rm200_pcibios_read_config_word (unsigned char bus, unsigned char dev_fn, unsigned char where, unsigned short *val) { u32 res; if (where & 1) return PCIBIOS_BAD_REGISTER_NUMBER; mkaddr(bus, dev_fn, where); res = *(volatile u32 *)PCIMT_CONFIG_DATA; res = (le32_to_cpu(res) >> ((where & 3) << 3)) & 0xffff; *val = res; return PCIBIOS_SUCCESSFUL; } static int sni_rm200_pcibios_read_config_dword (unsigned char bus, unsigned char dev_fn, unsigned char where, unsigned int *val) { u32 res; if (where & 3) return PCIBIOS_BAD_REGISTER_NUMBER; mkaddr(bus, dev_fn, where); res = *(volatile u32 *)PCIMT_CONFIG_DATA; res = le32_to_cpu(res); *val = res; return PCIBIOS_SUCCESSFUL; } static int sni_rm200_pcibios_write_config_byte (unsigned char bus, unsigned char dev_fn, unsigned char where, unsigned char val) { mkaddr(bus, dev_fn, where); *(volatile u8 *)(PCIMT_CONFIG_DATA + (where & 3)) = val; return PCIBIOS_SUCCESSFUL; } static int sni_rm200_pcibios_write_config_word (unsigned char bus, unsigned char dev_fn, unsigned char where, unsigned short val) { if (where & 1) return PCIBIOS_BAD_REGISTER_NUMBER; mkaddr(bus, dev_fn, where); *(volatile u16 *)(PCIMT_CONFIG_DATA + (where & 3)) = le16_to_cpu(val); return PCIBIOS_SUCCESSFUL; } static int sni_rm200_pcibios_write_config_dword (unsigned char bus, unsigned char dev_fn, unsigned char where, unsigned int val) { if (where & 3) return PCIBIOS_BAD_REGISTER_NUMBER; mkaddr(bus, dev_fn, where); *(volatile u32 *)PCIMT_CONFIG_DATA = le32_to_cpu(val); return PCIBIOS_SUCCESSFUL; } struct pci_ops sni_pci_ops = { sni_rm200_pcibios_fixup, sni_rm200_pcibios_read_config_byte, sni_rm200_pcibios_read_config_word, sni_rm200_pcibios_read_config_dword, sni_rm200_pcibios_write_config_byte, sni_rm200_pcibios_write_config_word, sni_rm200_pcibios_write_config_dword }; #endif /* CONFIG_PCI */ |