Eric Lee / smarc-uboot

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drivers/pci_indirect.c 2.7 KB
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affae2bff   wdenk   Initial revision 
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  /*
   * Support for indirect PCI bridges.
   *
   * Copyright (C) 1998 Gabriel Paubert.
   *
   * 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.
   */
  
  #include <common.h>
  
  #ifdef CONFIG_PCI
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  #ifndef __I386__
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  #include <asm/processor.h>
  #include <asm/io.h>
  #include <pci.h>
  
  #define cfg_read(val, addr, type, op)	*val = op((type)(addr))
  #define cfg_write(val, addr, type, op)	op((type *)(addr), (val))
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  #if defined(CONFIG_MPC8260)
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  #define INDIRECT_PCI_OP(rw, size, type, op, mask)			 \
  static int								 \
  indirect_##rw##_config_##size(struct pci_controller *hose, 		 \
  			      pci_dev_t dev, int offset, type val)	 \
  {									 \
  	out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000); 	 \
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  	sync();								 \
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  	cfg_##rw(val, hose->cfg_data + (offset & mask), type, op);	 \
  	return 0;    					 		 \
  }
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  #else
  #define INDIRECT_PCI_OP(rw, size, type, op, mask)			 \
  static int								 \
  indirect_##rw##_config_##size(struct pci_controller *hose, 		 \
  			      pci_dev_t dev, int offset, type val)	 \
  {									 \
  	out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000); 	 \
  	cfg_##rw(val, hose->cfg_data + (offset & mask), type, op);	 \
  	return 0;    					 		 \
  }
  #endif
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  #define INDIRECT_PCI_OP_ERRATA6(rw, size, type, op, mask)		 \
  static int								 \
  indirect_##rw##_config_##size(struct pci_controller *hose, 		 \
  			      pci_dev_t dev, int offset, type val)	 \
  {									 \
  	unsigned int msr = mfmsr();					 \
  	mtmsr(msr & ~(MSR_EE | MSR_CE));				 \
  	out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000); 	 \
  	cfg_##rw(val, hose->cfg_data + (offset & mask), type, op);	 \
  	out_le32(hose->cfg_addr, 0x00000000); 				 \
  	mtmsr(msr);							 \
  	return 0;    					 		 \
  }
  
  INDIRECT_PCI_OP(read, byte, u8 *, in_8, 3)
  INDIRECT_PCI_OP(read, word, u16 *, in_le16, 2)
  INDIRECT_PCI_OP(read, dword, u32 *, in_le32, 0)
  #ifdef CONFIG_405GP
  INDIRECT_PCI_OP_ERRATA6(write, byte, u8, out_8, 3)
  INDIRECT_PCI_OP_ERRATA6(write, word, u16, out_le16, 2)
  INDIRECT_PCI_OP_ERRATA6(write, dword, u32, out_le32, 0)
  #else
  INDIRECT_PCI_OP(write, byte, u8, out_8, 3)
  INDIRECT_PCI_OP(write, word, u16, out_le16, 2)
  INDIRECT_PCI_OP(write, dword, u32, out_le32, 0)
  #endif
  
  void pci_setup_indirect(struct pci_controller* hose, u32 cfg_addr, u32 cfg_data)
  {
  	pci_set_ops(hose,
  		    indirect_read_config_byte,
  		    indirect_read_config_word,
  		    indirect_read_config_dword,
  		    indirect_write_config_byte,
  		    indirect_write_config_word,
  		    indirect_write_config_dword);
  
  	hose->cfg_addr = (unsigned int *) cfg_addr;
  	hose->cfg_data = (unsigned char *) cfg_data;
  }
  
  #endif
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  #endif