Eric Lee / smarc-fsl-linux-kernel

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arch/mips/pci/pci-tx4939.c 2.61 KB
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0dcdbe6ad   Atsushi Nemoto   MIPS: TXx9: Add T... 
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  /*
0dcdbe6ad   Atsushi Nemoto   MIPS: TXx9: Add T... 
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   * Based on linux/arch/mips/txx9/rbtx4939/setup.c,
   *	    and RBTX49xx patch from CELF patch archive.
   *
   * Copyright 2001, 2003-2005 MontaVista Software Inc.
   * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org)
   * (C) Copyright TOSHIBA CORPORATION 2000-2001, 2004-2007
   *
   * This file is subject to the terms and conditions of the GNU General Public
   * License.  See the file "COPYING" in the main directory of this archive
   * for more details.
   */
  #include <linux/init.h>
  #include <linux/pci.h>
  #include <linux/kernel.h>
  #include <linux/interrupt.h>
  #include <asm/txx9/generic.h>
  #include <asm/txx9/tx4939.h>
  
  int __init tx4939_report_pciclk(void)
  {
  	int pciclk = 0;
  
  	pr_info("PCIC --%s PCICLK:",
  		(__raw_readq(&tx4939_ccfgptr->ccfg) & TX4939_CCFG_PCI66) ?
  		" PCI66" : "");
  	if (__raw_readq(&tx4939_ccfgptr->pcfg) & TX4939_PCFG_PCICLKEN_ALL) {
  		pciclk = txx9_master_clock * 20 / 6;
  		if (!(__raw_readq(&tx4939_ccfgptr->ccfg) & TX4939_CCFG_PCI66))
  			pciclk /= 2;
  		printk(KERN_CONT "Internal(%u.%uMHz)",
  		       (pciclk + 50000) / 1000000,
  		       ((pciclk + 50000) / 100000) % 10);
  	} else {
  		printk(KERN_CONT "External");
  		pciclk = -1;
  	}
  	printk(KERN_CONT "
  ");
  	return pciclk;
  }
  
  void __init tx4939_report_pci1clk(void)
  {
  	unsigned int pciclk = txx9_master_clock * 20 / 6;
  
  	pr_info("PCIC1 -- PCICLK:%u.%uMHz
  ",
  		(pciclk + 50000) / 1000000,
  		((pciclk + 50000) / 100000) % 10);
  }
  
  int __init tx4939_pcic1_map_irq(const struct pci_dev *dev, u8 slot)
  {
  	if (get_tx4927_pcicptr(dev->bus->sysdata) == tx4939_pcic1ptr) {
  		switch (slot) {
  		case TX4927_PCIC_IDSEL_AD_TO_SLOT(31):
  			if (__raw_readq(&tx4939_ccfgptr->pcfg) &
  			    TX4939_PCFG_ET0MODE)
  				return TXX9_IRQ_BASE + TX4939_IR_ETH(0);
  			break;
  		case TX4927_PCIC_IDSEL_AD_TO_SLOT(30):
  			if (__raw_readq(&tx4939_ccfgptr->pcfg) &
  			    TX4939_PCFG_ET1MODE)
  				return TXX9_IRQ_BASE + TX4939_IR_ETH(1);
  			break;
  		}
  		return 0;
  	}
  	return -1;
  }
  
  int __init tx4939_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
  {
  	int irq = tx4939_pcic1_map_irq(dev, slot);
  
  	if (irq >= 0)
  		return irq;
  	irq = pin;
  	/* IRQ rotation */
  	irq--;	/* 0-3 */
  	irq = (irq + 33 - slot) % 4;
  	irq++;	/* 1-4 */
  
  	switch (irq) {
  	case 1:
  		irq = TXX9_IRQ_BASE + TX4939_IR_INTA;
  		break;
  	case 2:
  		irq = TXX9_IRQ_BASE + TX4939_IR_INTB;
  		break;
  	case 3:
  		irq = TXX9_IRQ_BASE + TX4939_IR_INTC;
  		break;
  	case 4:
  		irq = TXX9_IRQ_BASE + TX4939_IR_INTD;
  		break;
  	}
  	return irq;
  }
  
  void __init tx4939_setup_pcierr_irq(void)
  {
  	if (request_irq(TXX9_IRQ_BASE + TX4939_IR_PCIERR,
  			tx4927_pcierr_interrupt,
8b5690f88   Yong Zhang   MIPS: irq: Remove... 
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  			0, "PCI error",
0dcdbe6ad   Atsushi Nemoto   MIPS: TXx9: Add T... 
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  			(void *)TX4939_PCIC_REG))
  		pr_warning("Failed to request irq for PCIERR
  ");
  }