Eric Lee / smarc-fsl-linux-kernel

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arch/mips/pci/fixup-malta.c 2.81 KB
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1da177e4c   Linus Torvalds   Linux-2.6.12-rc2 
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  #include <linux/init.h>
  #include <linux/pci.h>
  
  /* PCI interrupt pins */
  #define PCIA		1
  #define PCIB		2
  #define PCIC		3
  #define PCID		4
  
  /* This table is filled in by interrogating the PIIX4 chip */
  static char pci_irq[5] __initdata;
  
  static char irq_tab[][5] __initdata = {
  	/*      INTA    INTB    INTC    INTD */
  	{0,	0,	0,	0,	0 },	/*  0: GT64120 PCI bridge */
  	{0,	0,	0,	0,	0 },	/*  1: Unused */
  	{0,	0,	0,	0,	0 },	/*  2: Unused */
  	{0,	0,	0,	0,	0 },	/*  3: Unused */
  	{0,	0,	0,	0,	0 },	/*  4: Unused */
  	{0,	0,	0,	0,	0 },	/*  5: Unused */
  	{0,	0,	0,	0,	0 },	/*  6: Unused */
  	{0,	0,	0,	0,	0 },	/*  7: Unused */
  	{0,	0,	0,	0,	0 },	/*  8: Unused */
  	{0,	0,	0,	0,	0 },	/*  9: Unused */
  	{0,	0,	0,	0,	PCID },	/* 10: PIIX4 USB */
  	{0,	PCIB,	0,	0,	0 },	/* 11: AMD 79C973 Ethernet */
  	{0,	PCIC,	0,	0,	0 },	/* 12: Crystal 4281 Sound */
  	{0,	0,	0,	0,	0 },	/* 13: Unused */
  	{0,	0,	0,	0,	0 },	/* 14: Unused */
  	{0,	0,	0,	0,	0 },	/* 15: Unused */
  	{0,	0,	0,	0,	0 },	/* 16: Unused */
  	{0,	0,	0,	0,	0 },	/* 17: Bonito/SOC-it PCI Bridge*/
  	{0,	PCIA,	PCIB,	PCIC,	PCID },	/* 18: PCI Slot 1 */
  	{0,	PCIB,	PCIC,	PCID,	PCIA },	/* 19: PCI Slot 2 */
  	{0,	PCIC,	PCID,	PCIA,	PCIB },	/* 20: PCI Slot 3 */
  	{0,	PCID,	PCIA,	PCIB,	PCIC }	/* 21: PCI Slot 4 */
  };
19df0d116   Ralf Baechle   [MIPS] PCI: Make ... 
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  int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
1da177e4c   Linus Torvalds   Linux-2.6.12-rc2 
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  {
  	int virq;
  	virq = irq_tab[slot][pin];
  	return pci_irq[virq];
  }
  
  /* Do platform specific device initialization at pci_enable_device() time */
  int pcibios_plat_dev_init(struct pci_dev *dev)
  {
  	return 0;
  }
  
  static void __init malta_piix_func0_fixup(struct pci_dev *pdev)
  {
  	unsigned char reg_val;
  	static int piixirqmap[16] __initdata = {  /* PIIX PIRQC[A:D] irq mappings */
  		0,  0, 	0,  3,
  		4,  5,  6,  7,
  		0,  9, 10, 11,
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  		12, 0, 14, 15
1da177e4c   Linus Torvalds   Linux-2.6.12-rc2 
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  	};
  	int i;
  
  	/* Interrogate PIIX4 to get PCI IRQ mapping */
  	for (i = 0; i <= 3; i++) {
  		pci_read_config_byte(pdev, 0x60+i, &reg_val);
  		if (reg_val & 0x80)
  			pci_irq[PCIA+i] = 0;	/* Disabled */
  		else
  			pci_irq[PCIA+i] = piixirqmap[reg_val & 15];
  	}
  
  	/* Done by YAMON 2.00 onwards */
  	if (PCI_SLOT(pdev->devfn) == 10) {
  		/*
  		 * Set top of main memory accessible by ISA or DMA
  		 * devices to 16 Mb.
  		 */
  		pci_read_config_byte(pdev, 0x69, &reg_val);
  		pci_write_config_byte(pdev, 0x69, reg_val | 0xf0);
  	}
  }
  
  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_0,
  	 malta_piix_func0_fixup);
  
  static void __init malta_piix_func1_fixup(struct pci_dev *pdev)
  {
  	unsigned char reg_val;
  
  	/* Done by YAMON 2.02 onwards */
  	if (PCI_SLOT(pdev->devfn) == 10) {
  		/*
  		 * IDE Decode enable.
  		 */
  		pci_read_config_byte(pdev, 0x41, &reg_val);
  		pci_write_config_byte(pdev, 0x41, reg_val|0x80);
  		pci_read_config_byte(pdev, 0x43, &reg_val);
  		pci_write_config_byte(pdev, 0x43, reg_val|0x80);
  	}
  }
  
  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB,
  	 malta_piix_func1_fixup);