/*
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* Support for indirect PCI bridges.
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*
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* Copyright (C) 1998 Gabriel Paubert.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#if !defined(__I386__)
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#include <asm/processor.h>
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#include <asm/io.h>
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#include <pci.h>
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#define cfg_read(val, addr, type, op) *val = op((type)(addr))
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#define cfg_write(val, addr, type, op) op((type *)(addr), (val))
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#if defined(CONFIG_E500) || defined(CONFIG_MPC86xx)
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#define INDIRECT_PCI_OP(rw, size, type, op, mask) \
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static int \
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indirect_##rw##_config_##size(struct pci_controller *hose, \
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pci_dev_t dev, int offset, type val) \
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{ \
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u32 b, d,f; \
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b = PCI_BUS(dev); d = PCI_DEV(dev); f = PCI_FUNC(dev); \
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b = b - hose->first_busno; \
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dev = PCI_BDF(b, d, f); \
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*(hose->cfg_addr) = dev | (offset & 0xfc) | ((offset & 0xf00) << 16) | 0x80000000; \
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sync(); \
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cfg_##rw(val, hose->cfg_data + (offset & mask), type, op); \
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return 0; \
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}
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#else
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#define INDIRECT_PCI_OP(rw, size, type, op, mask) \
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static int \
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indirect_##rw##_config_##size(struct pci_controller *hose, \
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pci_dev_t dev, int offset, type val) \
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{ \
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u32 b, d,f; \
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b = PCI_BUS(dev); d = PCI_DEV(dev); f = PCI_FUNC(dev); \
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b = b - hose->first_busno; \
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dev = PCI_BDF(b, d, f); \
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out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000); \
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cfg_##rw(val, hose->cfg_data + (offset & mask), type, op); \
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return 0; \
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}
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#endif
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INDIRECT_PCI_OP(read, byte, u8 *, in_8, 3)
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INDIRECT_PCI_OP(read, word, u16 *, in_le16, 2)
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INDIRECT_PCI_OP(read, dword, u32 *, in_le32, 0)
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INDIRECT_PCI_OP(write, byte, u8, out_8, 3)
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INDIRECT_PCI_OP(write, word, u16, out_le16, 2)
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INDIRECT_PCI_OP(write, dword, u32, out_le32, 0)
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void pci_setup_indirect(struct pci_controller* hose, u32 cfg_addr, u32 cfg_data)
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{
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pci_set_ops(hose,
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indirect_read_config_byte,
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indirect_read_config_word,
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indirect_read_config_dword,
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indirect_write_config_byte,
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indirect_write_config_word,
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indirect_write_config_dword);
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hose->cfg_addr = (unsigned int *) cfg_addr;
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hose->cfg_data = (unsigned char *) cfg_data;
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}
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#endif /* !__I386__ */
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