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kernel/linux-imx6_3.14.28/arch/mips/pci/fixup-lemote2f.c 4.71 KB
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  /*
   * Copyright (C) 2008 Lemote Technology
   * Copyright (C) 2004 ICT CAS
   * Author: Li xiaoyu, lixy@ict.ac.cn
   *
   * Copyright (C) 2007 Lemote, Inc.
   * Author: Fuxin Zhang, zhangfx@lemote.com
   *
   *  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/init.h>
  #include <linux/pci.h>
  
  #include <loongson.h>
  #include <cs5536/cs5536.h>
  #include <cs5536/cs5536_pci.h>
  
  /* PCI interrupt pins
   *
   * These should not be changed, or you should consider loongson2f interrupt
   * register and your pci card dispatch
   */
  
  #define PCIA		4
  #define PCIB		5
  #define PCIC		6
  #define PCID		7
  
  /* all the pci device has the PCIA pin, check the datasheet. */
  static char irq_tab[][5] __initdata = {
  	/*	INTA	INTB	INTC	INTD */
  	{0, 0, 0, 0, 0},	/*  11: Unused */
  	{0, 0, 0, 0, 0},	/*  12: Unused */
  	{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, PCIA, 0, 0, 0},	/*  17: RTL8110-0 */
  	{0, PCIB, 0, 0, 0},	/*  18: RTL8110-1 */
  	{0, PCIC, 0, 0, 0},	/*  19: SiI3114 */
  	{0, PCID, 0, 0, 0},	/*  20: 3-ports nec usb */
  	{0, PCIA, PCIB, PCIC, PCID},	/*  21: PCI-SLOT */
  	{0, 0, 0, 0, 0},	/*  22: Unused */
  	{0, 0, 0, 0, 0},	/*  23: Unused */
  	{0, 0, 0, 0, 0},	/*  24: Unused */
  	{0, 0, 0, 0, 0},	/*  25: Unused */
  	{0, 0, 0, 0, 0},	/*  26: Unused */
  	{0, 0, 0, 0, 0},	/*  27: Unused */
  };
  
  int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  {
  	int virq;
  
  	if ((PCI_SLOT(dev->devfn) != PCI_IDSEL_CS5536)
  	    && (PCI_SLOT(dev->devfn) < 32)) {
  		virq = irq_tab[slot][pin];
  		printk(KERN_INFO "slot: %d, pin: %d, irq: %d
  ", slot, pin,
  		       virq + LOONGSON_IRQ_BASE);
  		if (virq != 0)
  			return LOONGSON_IRQ_BASE + virq;
  		else
  			return 0;
  	} else if (PCI_SLOT(dev->devfn) == PCI_IDSEL_CS5536) {	/*  cs5536 */
  		switch (PCI_FUNC(dev->devfn)) {
  		case 2:
  			pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
  					      CS5536_IDE_INTR);
  			return CS5536_IDE_INTR; /*  for IDE */
  		case 3:
  			pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
  					      CS5536_ACC_INTR);
  			return CS5536_ACC_INTR; /*  for AUDIO */
  		case 4: /*  for OHCI */
  		case 5: /*  for EHCI */
  		case 6: /*  for UDC */
  		case 7: /*  for OTG */
  			pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
  					      CS5536_USB_INTR);
  			return CS5536_USB_INTR;
  		}
  		return dev->irq;
  	} else {
  		printk(KERN_INFO " strange pci slot number.
  ");
  		return 0;
  	}
  }
  
  /* Do platform specific device initialization at pci_enable_device() time */
  int pcibios_plat_dev_init(struct pci_dev *dev)
  {
  	return 0;
  }
  
  /* CS5536 SPEC. fixup */
  static void loongson_cs5536_isa_fixup(struct pci_dev *pdev)
  {
  	/* the uart1 and uart2 interrupt in PIC is enabled as default */
  	pci_write_config_dword(pdev, PCI_UART1_INT_REG, 1);
  	pci_write_config_dword(pdev, PCI_UART2_INT_REG, 1);
  }
  
  static void loongson_cs5536_ide_fixup(struct pci_dev *pdev)
  {
  	/* setting the mutex pin as IDE function */
  	pci_write_config_dword(pdev, PCI_IDE_CFG_REG,
  			       CS5536_IDE_FLASH_SIGNATURE);
  }
  
  static void loongson_cs5536_acc_fixup(struct pci_dev *pdev)
  {
  	/* enable the AUDIO interrupt in PIC  */
  	pci_write_config_dword(pdev, PCI_ACC_INT_REG, 1);
  
  	pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xc0);
  }
  
  static void loongson_cs5536_ohci_fixup(struct pci_dev *pdev)
  {
  	/* enable the OHCI interrupt in PIC */
  	/* THE OHCI, EHCI, UDC, OTG are shared with interrupt in PIC */
  	pci_write_config_dword(pdev, PCI_OHCI_INT_REG, 1);
  }
  
  static void loongson_cs5536_ehci_fixup(struct pci_dev *pdev)
  {
  	u32 hi, lo;
  
  	/* Serial short detect enable */
  	_rdmsr(USB_MSR_REG(USB_CONFIG), &hi, &lo);
  	_wrmsr(USB_MSR_REG(USB_CONFIG), (1 << 1) | (1 << 3), lo);
  
  	/* setting the USB2.0 micro frame length */
  	pci_write_config_dword(pdev, PCI_EHCI_FLADJ_REG, 0x2000);
  }
  
  static void loongson_nec_fixup(struct pci_dev *pdev)
  {
  	unsigned int val;
  
  	pci_read_config_dword(pdev, 0xe0, &val);
  	/* Only 2 port be used */
  	pci_write_config_dword(pdev, 0xe0, (val & ~3) | 0x2);
  }
  
  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA,
  			 loongson_cs5536_isa_fixup);
  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_OHC,
  			 loongson_cs5536_ohci_fixup);
  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_EHC,
  			 loongson_cs5536_ehci_fixup);
  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_AUDIO,
  			 loongson_cs5536_acc_fixup);
  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_IDE,
  			 loongson_cs5536_ide_fixup);
  DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB,
  			 loongson_nec_fixup);