/* * ops-vr41xx.c, PCI configuration routines for the PCIU of NEC VR4100 series. * * Copyright (C) 2001-2003 MontaVista Software Inc. * Author: Yoichi Yuasa <yyuasa@mvista.com or source@mvista.com> * Copyright (C) 2004-2005 Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that 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 */ /* * Changes: * MontaVista Software Inc. <yyuasa@mvista.com> or <source@mvista.com> * - New creation, NEC VR4122 and VR4131 are supported. */ #include <linux/pci.h> #include <linux/types.h> #include <asm/io.h> #define PCICONFDREG (void __iomem *)KSEG1ADDR(0x0f000c14) #define PCICONFAREG (void __iomem *)KSEG1ADDR(0x0f000c18) static inline int set_pci_configuration_address(unsigned char number, unsigned int devfn, int where) { if (number == 0) { /* * Type 0 configuration */ if (PCI_SLOT(devfn) < 11 || where > 0xff) return -EINVAL; writel((1U << PCI_SLOT(devfn)) | (PCI_FUNC(devfn) << 8) | (where & 0xfc), PCICONFAREG); } else { /* * Type 1 configuration */ if (where > 0xff) return -EINVAL; writel(((uint32_t)number << 16) | ((devfn & 0xff) << 8) | (where & 0xfc) | 1U, PCICONFAREG); } return 0; } static int pci_config_read(struct pci_bus *bus, unsigned int devfn, int where, int size, uint32_t *val) { uint32_t data; *val = 0xffffffffU; if (set_pci_configuration_address(bus->number, devfn, where) < 0) return PCIBIOS_DEVICE_NOT_FOUND; data = readl(PCICONFDREG); switch (size) { case 1: *val = (data >> ((where & 3) << 3)) & 0xffU; break; case 2: *val = (data >> ((where & 2) << 3)) & 0xffffU; break; case 4: *val = data; break; default: return PCIBIOS_FUNC_NOT_SUPPORTED; } return PCIBIOS_SUCCESSFUL; } static int pci_config_write(struct pci_bus *bus, unsigned int devfn, int where, int size, uint32_t val) { uint32_t data; int shift; if (set_pci_configuration_address(bus->number, devfn, where) < 0) return PCIBIOS_DEVICE_NOT_FOUND; data = readl(PCICONFDREG); switch (size) { case 1: shift = (where & 3) << 3; data &= ~(0xffU << shift); data |= ((val & 0xffU) << shift); break; case 2: shift = (where & 2) << 3; data &= ~(0xffffU << shift); data |= ((val & 0xffffU) << shift); break; case 4: data = val; break; default: return PCIBIOS_FUNC_NOT_SUPPORTED; } writel(data, PCICONFDREG); return PCIBIOS_SUCCESSFUL; } struct pci_ops vr41xx_pci_ops = { .read = pci_config_read, .write = pci_config_write, };