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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [arch/] [mips/] [pci/] [ops-bonito64.c] - Rev 1275
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/* * Carsten Langgaard, carstenl@mips.com * Copyright (C) 1999, 2000 MIPS Technologies, Inc. All rights reserved. * * This program is free software; you can distribute it and/or modify it * under the terms of the GNU General Public License (Version 2) as * published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. */ #include <linux/types.h> #include <linux/pci.h> #include <linux/kernel.h> #include <linux/init.h> #include <asm/mips-boards/bonito64.h> #define PCI_ACCESS_READ 0 #define PCI_ACCESS_WRITE 1 /* * PCI configuration cycle AD bus definition */ /* Type 0 */ #define PCI_CFG_TYPE0_REG_SHF 0 #define PCI_CFG_TYPE0_FUNC_SHF 8 /* Type 1 */ #define PCI_CFG_TYPE1_REG_SHF 0 #define PCI_CFG_TYPE1_FUNC_SHF 8 #define PCI_CFG_TYPE1_DEV_SHF 11 #define PCI_CFG_TYPE1_BUS_SHF 16 static int bonito64_config_access(unsigned char access_type, struct pci_dev *dev, unsigned char where, u32 *data) { unsigned char bus = dev->bus->number; unsigned char dev_fn = dev->devfn; unsigned char type; u32 intr, dummy; u64 pci_addr; if ((bus == 0) && (PCI_SLOT(dev_fn) == 0)) return -1; /* Clear cause register bits */ BONITO_PCICMD |= (BONITO_PCICMD_MABORT_CLR | BONITO_PCICMD_MTABORT_CLR); /* * Setup pattern to be used as PCI "address" for Type 0 cycle */ if (bus == 0) { /* IDSEL */ pci_addr = (u64)1 << (PCI_SLOT(dev_fn) + 10); } else { /* Bus number */ pci_addr = bus << PCI_CFG_TYPE1_BUS_SHF; /* Device number */ pci_addr |= PCI_SLOT(dev_fn) << PCI_CFG_TYPE1_DEV_SHF; } /* Function (same for Type 0/1) */ pci_addr |= PCI_FUNC(dev_fn) << PCI_CFG_TYPE0_FUNC_SHF; /* Register number (same for Type 0/1) */ pci_addr |= (where & ~0x3) << PCI_CFG_TYPE0_REG_SHF; if (bus == 0) { /* Type 0 */ BONITO_PCIMAP_CFG = pci_addr >> 16; } else { /* Type 1 */ BONITO_PCIMAP_CFG = (pci_addr >> 16) | 0x10000; } /* Flush Bonito register block */ dummy = BONITO_PCIMAP_CFG; iob(); /* sync */ /* Perform access */ if (access_type == PCI_ACCESS_WRITE) { *(volatile u32 *)(KSEG1ADDR(BONITO_PCICFG_BASE + (pci_addr & 0xffff))) = *(u32 *)data; /* Wait till done */ while (BONITO_PCIMSTAT & 0xF) ; } else { *(u32 *)data = *(volatile u32 *)(KSEG1ADDR(BONITO_PCICFG_BASE + (pci_addr & 0xffff))); } /* Detect Master/Target abort */ if (BONITO_PCICMD & (BONITO_PCICMD_MABORT_CLR | BONITO_PCICMD_MTABORT_CLR)) { /* Error occurred */ /* Clear bits */ BONITO_PCICMD |= (BONITO_PCICMD_MABORT_CLR | BONITO_PCICMD_MTABORT_CLR); return -1; } return 0; } /* * 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 bonito64_read_config_byte (struct pci_dev *dev, int where, u8 *val) { u32 data = 0; if (bonito64_config_access(PCI_ACCESS_READ, dev, where, &data)) return -1; *val = (data >> ((where & 3) << 3)) & 0xff; return PCIBIOS_SUCCESSFUL; } static int bonito64_read_config_word (struct pci_dev *dev, int where, u16 *val) { u32 data = 0; if (where & 1) return PCIBIOS_BAD_REGISTER_NUMBER; if (bonito64_config_access(PCI_ACCESS_READ, dev, where, &data)) return -1; *val = (data >> ((where & 3) << 3)) & 0xffff; return PCIBIOS_SUCCESSFUL; } static int bonito64_read_config_dword (struct pci_dev *dev, int where, u32 *val) { u32 data = 0; if (where & 3) return PCIBIOS_BAD_REGISTER_NUMBER; if (bonito64_config_access(PCI_ACCESS_READ, dev, where, &data)) return -1; *val = data; return PCIBIOS_SUCCESSFUL; } static int bonito64_write_config_byte (struct pci_dev *dev, int where, u8 val) { u32 data = 0; if (bonito64_config_access(PCI_ACCESS_READ, dev, where, &data)) return -1; data = (data & ~(0xff << ((where & 3) << 3))) | (val << ((where & 3) << 3)); if (bonito64_config_access(PCI_ACCESS_WRITE, dev, where, &data)) return -1; return PCIBIOS_SUCCESSFUL; } static int bonito64_write_config_word (struct pci_dev *dev, int where, u16 val) { u32 data = 0; if (where & 1) return PCIBIOS_BAD_REGISTER_NUMBER; if (bonito64_config_access(PCI_ACCESS_READ, dev, where, &data)) return -1; data = (data & ~(0xffff << ((where & 3) << 3))) | (val << ((where & 3) << 3)); if (bonito64_config_access(PCI_ACCESS_WRITE, dev, where, &data)) return -1; return PCIBIOS_SUCCESSFUL; } static int bonito64_write_config_dword(struct pci_dev *dev, int where, u32 val) { if (where & 3) return PCIBIOS_BAD_REGISTER_NUMBER; if (bonito64_config_access(PCI_ACCESS_WRITE, dev, where, &val)) return -1; return PCIBIOS_SUCCESSFUL; } struct pci_ops bonito64_pci_ops = { bonito64_read_config_byte, bonito64_read_config_word, bonito64_read_config_dword, bonito64_write_config_byte, bonito64_write_config_word, bonito64_write_config_dword };
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