1 // SPDX-License-Identifier: GPL-2.0-or-later
3  *  ops-vr41xx.c, PCI configuration routines for the PCIU of NEC VR4100 series.
5  *  Copyright (C) 2001-2003 MontaVista Software Inc.
7  *  Copyright (C) 2004-2005  Yoichi Yuasa <yuasa@linux-mips.org>
12  *  - New creation, NEC VR4122 and VR4131 are supported.
30 			return -EINVAL;  in set_pci_configuration_address()
39 			return -EINVAL;  in set_pci_configuration_address()
51 	uint32_t data;  in pci_config_read()  local
54 	if (set_pci_configuration_address(bus->number, devfn, where) < 0)  in pci_config_read()
57 	data = readl(PCICONFDREG);  in pci_config_read()
61 		*val = (data >> ((where & 3) << 3)) & 0xffU;  in pci_config_read()
64 		*val = (data >> ((where & 2) << 3)) & 0xffffU;  in pci_config_read()
67 		*val = data;  in pci_config_read()
79 	uint32_t data;  in pci_config_write()  local
80 	int shift;  in pci_config_write()  local
82 	if (set_pci_configuration_address(bus->number, devfn, where) < 0)  in pci_config_write()
85 	data = readl(PCICONFDREG);  in pci_config_write()
89 		shift = (where & 3) << 3;  in pci_config_write()
90 		data &= ~(0xffU << shift);  in pci_config_write()
91 		data |= ((val & 0xffU) << shift);  in pci_config_write()
94 		shift = (where & 2) << 3;  in pci_config_write()
95 		data &= ~(0xffffU << shift);  in pci_config_write()
96 		data |= ((val & 0xffffU) << shift);  in pci_config_write()
99 		data = val;  in pci_config_write()
105 	writel(data, PCICONFDREG);  in pci_config_write()