1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Support for indirect PCI bridges. 4 * 5 * Copyright (C) 1998 Gabriel Paubert. 6 */ 7 8 #include <common.h> 9 10 #if !defined(__I386__) && !defined(CONFIG_DM_PCI) 11 12 #include <asm/processor.h> 13 #include <asm/io.h> 14 #include <pci.h> 15 16 #define cfg_read(val, addr, type, op) *val = op((type)(addr)) 17 #define cfg_write(val, addr, type, op) op((type *)(addr), (val)) 18 19 #if defined(CONFIG_E500) || defined(CONFIG_MPC86xx) 20 #define INDIRECT_PCI_OP(rw, size, type, op, mask) \ 21 static int \ 22 indirect_##rw##_config_##size(struct pci_controller *hose, \ 23 pci_dev_t dev, int offset, type val) \ 24 { \ 25 u32 b, d,f; \ 26 b = PCI_BUS(dev); d = PCI_DEV(dev); f = PCI_FUNC(dev); \ 27 b = b - hose->first_busno; \ 28 dev = PCI_BDF(b, d, f); \ 29 *(hose->cfg_addr) = dev | (offset & 0xfc) | ((offset & 0xf00) << 16) | 0x80000000; \ 30 sync(); \ 31 cfg_##rw(val, hose->cfg_data + (offset & mask), type, op); \ 32 return 0; \ 33 } 34 #else 35 #define INDIRECT_PCI_OP(rw, size, type, op, mask) \ 36 static int \ 37 indirect_##rw##_config_##size(struct pci_controller *hose, \ 38 pci_dev_t dev, int offset, type val) \ 39 { \ 40 u32 b, d,f; \ 41 b = PCI_BUS(dev); d = PCI_DEV(dev); f = PCI_FUNC(dev); \ 42 b = b - hose->first_busno; \ 43 dev = PCI_BDF(b, d, f); \ 44 out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000); \ 45 cfg_##rw(val, hose->cfg_data + (offset & mask), type, op); \ 46 return 0; \ 47 } 48 #endif 49 50 INDIRECT_PCI_OP(read, byte, u8 *, in_8, 3) 51 INDIRECT_PCI_OP(read, word, u16 *, in_le16, 2) 52 INDIRECT_PCI_OP(read, dword, u32 *, in_le32, 0) 53 INDIRECT_PCI_OP(write, byte, u8, out_8, 3) 54 INDIRECT_PCI_OP(write, word, u16, out_le16, 2) 55 INDIRECT_PCI_OP(write, dword, u32, out_le32, 0) 56 57 void pci_setup_indirect(struct pci_controller* hose, u32 cfg_addr, u32 cfg_data) 58 { 59 pci_set_ops(hose, 60 indirect_read_config_byte, 61 indirect_read_config_word, 62 indirect_read_config_dword, 63 indirect_write_config_byte, 64 indirect_write_config_word, 65 indirect_write_config_dword); 66 67 hose->cfg_addr = (unsigned int *) cfg_addr; 68 hose->cfg_data = (unsigned char *) cfg_data; 69 } 70 71 #endif /* !__I386__ */ 72