patch-2.2.8 linux/arch/ppc/kernel/indirect_pci.c

• Lines: 122
• Date: Tue May 11 08:24:32 1999
• Orig file: v2.2.7/linux/arch/ppc/kernel/indirect_pci.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.2.7/linux/arch/ppc/kernel/indirect_pci.c linux/arch/ppc/kernel/indirect_pci.c
@@ -0,0 +1,121 @@
+/*
+ * 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 <linux/pci.h>
+#include <asm/io.h>
+#include <asm/system.h>
+
+unsigned int * pci_config_address;
+unsigned char * pci_config_data;
+
+int indirect_pcibios_read_config_byte(unsigned char bus, unsigned char dev_fn,
+			     unsigned char offset, unsigned char *val)
+{
+	unsigned flags;
+
+	save_flags(flags); cli();
+	
+	out_be32(pci_config_address, 
+		 ((offset&0xfc)<<24) | (dev_fn<<16) | (bus<<8) | 0x80);
+
+	*val= in_8(pci_config_data + (offset&3));
+
+	restore_flags(flags);
+	return PCIBIOS_SUCCESSFUL;
+}
+
+int indirect_pcibios_read_config_word(unsigned char bus, unsigned char dev_fn,
+			     unsigned char offset, unsigned short *val)
+{
+	unsigned flags;
+	
+	if (offset&1) return PCIBIOS_BAD_REGISTER_NUMBER;
+
+	save_flags(flags); cli();
+	
+	out_be32(pci_config_address, 
+		 ((offset&0xfc)<<24) | (dev_fn<<16) | (bus<<8) | 0x80);
+
+	*val= in_le16((unsigned short *)(pci_config_data + (offset&3)));
+
+	restore_flags(flags);
+	return PCIBIOS_SUCCESSFUL;
+}
+
+int indirect_pcibios_read_config_dword(unsigned char bus, unsigned char dev_fn,
+			     unsigned char offset, unsigned int *val)
+{
+	unsigned flags;
+	
+	if (offset&3) return PCIBIOS_BAD_REGISTER_NUMBER;
+
+	save_flags(flags); cli();
+	
+	out_be32(pci_config_address, 
+		 ((offset&0xfc)<<24) | (dev_fn<<16) | (bus<<8) | 0x80);
+
+	*val= in_le32((unsigned *)pci_config_data);
+
+	restore_flags(flags);
+	return PCIBIOS_SUCCESSFUL;
+}
+
+int indirect_pcibios_write_config_byte(unsigned char bus, unsigned char dev_fn,
+			     unsigned char offset, unsigned char val)
+{
+	unsigned flags;
+
+	save_flags(flags); cli();
+	
+	out_be32(pci_config_address, 
+		 ((offset&0xfc)<<24) | (dev_fn<<16) | (bus<<8) | 0x80);
+
+	out_8(pci_config_data + (offset&3), val);
+
+	restore_flags(flags);
+	return PCIBIOS_SUCCESSFUL;
+}
+
+int indirect_pcibios_write_config_word(unsigned char bus, unsigned char dev_fn,
+			     unsigned char offset, unsigned short val)
+{
+	unsigned flags;
+
+	if (offset&1) return PCIBIOS_BAD_REGISTER_NUMBER;
+
+	save_flags(flags); cli();
+	
+	out_be32(pci_config_address, 
+		 ((offset&0xfc)<<24) | (dev_fn<<16) | (bus<<8) | 0x80);
+
+	out_le16((unsigned short *)(pci_config_data + (offset&3)), val);
+
+	restore_flags(flags);
+	return PCIBIOS_SUCCESSFUL;
+}
+
+int indirect_pcibios_write_config_dword(unsigned char bus, unsigned char dev_fn,
+			     unsigned char offset, unsigned int val)
+{
+	unsigned flags;
+
+	if (offset&3) return PCIBIOS_BAD_REGISTER_NUMBER;
+
+	save_flags(flags); cli();
+	
+	out_be32(pci_config_address, 
+		 ((offset&0xfc)<<24) | (dev_fn<<16) | (bus<<8) | 0x80);
+
+	out_le32((unsigned *)pci_config_data, val);
+
+	restore_flags(flags);
+	return PCIBIOS_SUCCESSFUL;
+}