1 // SPDX-License-Identifier: GPL-2.0-only
29 #define MAX_DEV_NUM (31 - ID_SEL_BEGIN)
33 				      struct pci_bus *bus,  in loongson_pcibios_config_access()  argument
35 				      u32 *data)  in loongson_pcibios_config_access()  argument
37 	u32 busnum = bus->number;  in loongson_pcibios_config_access()
46 		/* board-specific part,currently,only fuloong2f,yeeloong2f  in loongson_pcibios_config_access()
60 				*data = cs5536_pci_conf_read4(function, reg);  in loongson_pcibios_config_access()
63 				cs5536_pci_conf_write4(function, reg, *data);  in loongson_pcibios_config_access()
69 		/* Type 0 configuration for onboard PCI bus */  in loongson_pcibios_config_access()
71 			return -1;  in loongson_pcibios_config_access()
76 		/* Type 1 configuration for offboard PCI bus */  in loongson_pcibios_config_access()
93 		writel(cpu_to_le32(*data), addrp);  in loongson_pcibios_config_access()
95 		*data = le32_to_cpu(readl(addrp));  in loongson_pcibios_config_access()
106 		return -1;  in loongson_pcibios_config_access()
116  * read/write a 32bit word and mask/modify the data we actually want.
118 static int loongson_pcibios_read(struct pci_bus *bus, unsigned int devfn,  in loongson_pcibios_read()  argument
121 	u32 data = 0;  in loongson_pcibios_read()  local
128 	if (loongson_pcibios_config_access(PCI_ACCESS_READ, bus, devfn, where,  in loongson_pcibios_read()
129 				       &data))  in loongson_pcibios_read()
130 		return -1;  in loongson_pcibios_read()
133 		*val = (data >> ((where & 3) << 3)) & 0xff;  in loongson_pcibios_read()
135 		*val = (data >> ((where & 3) << 3)) & 0xffff;  in loongson_pcibios_read()
137 		*val = data;  in loongson_pcibios_read()
142 static int loongson_pcibios_write(struct pci_bus *bus, unsigned int devfn,  in loongson_pcibios_write()  argument
145 	u32 data = 0;  in loongson_pcibios_write()  local
153 		data = val;  in loongson_pcibios_write()
155 		if (loongson_pcibios_config_access(PCI_ACCESS_READ, bus, devfn,  in loongson_pcibios_write()
156 					where, &data))  in loongson_pcibios_write()
157 			return -1;  in loongson_pcibios_write()
160 			data = (data & ~(0xff << ((where & 3) << 3))) |  in loongson_pcibios_write()
163 			data = (data & ~(0xffff << ((where & 3) << 3))) |  in loongson_pcibios_write()
167 	if (loongson_pcibios_config_access(PCI_ACCESS_WRITE, bus, devfn, where,  in loongson_pcibios_write()
168 				       &data))  in loongson_pcibios_write()
169 		return -1;  in loongson_pcibios_write()
184 	struct pci_bus bus = {  in _rdmsr()  local
191 	loongson_pcibios_write(&bus, devfn, PCI_MSR_ADDR, 4, msr);  in _rdmsr()
192 	loongson_pcibios_read(&bus, devfn, PCI_MSR_DATA_LO, 4, lo);  in _rdmsr()
193 	loongson_pcibios_read(&bus, devfn, PCI_MSR_DATA_HI, 4, hi);  in _rdmsr()
200 	struct pci_bus bus = {  in _wrmsr()  local
207 	loongson_pcibios_write(&bus, devfn, PCI_MSR_ADDR, 4, msr);  in _wrmsr()
208 	loongson_pcibios_write(&bus, devfn, PCI_MSR_DATA_LO, 4, lo);  in _wrmsr()
209 	loongson_pcibios_write(&bus, devfn, PCI_MSR_DATA_HI, 4, hi);  in _wrmsr()