1/* 2 * Based on linux/arch/mips/txx9/rbtx4939/setup.c, 3 * and RBTX49xx patch from CELF patch archive. 4 * 5 * Copyright 2001, 2003-2005 MontaVista Software Inc. 6 * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org) 7 * (C) Copyright TOSHIBA CORPORATION 2000-2001, 2004-2007 8 * 9 * This file is subject to the terms and conditions of the GNU General Public 10 * License. See the file "COPYING" in the main directory of this archive 11 * for more details. 12 */ 13#include <linux/init.h> 14#include <linux/pci.h> 15#include <linux/kernel.h> 16#include <linux/interrupt.h> 17#include <asm/txx9/generic.h> 18#include <asm/txx9/tx4939.h> 19 20int __init tx4939_report_pciclk(void) 21{ 22 int pciclk = 0; 23 24 pr_info("PCIC --%s PCICLK:", 25 (__raw_readq(&tx4939_ccfgptr->ccfg) & TX4939_CCFG_PCI66) ? 26 " PCI66" : ""); 27 if (__raw_readq(&tx4939_ccfgptr->pcfg) & TX4939_PCFG_PCICLKEN_ALL) { 28 pciclk = txx9_master_clock * 20 / 6; 29 if (!(__raw_readq(&tx4939_ccfgptr->ccfg) & TX4939_CCFG_PCI66)) 30 pciclk /= 2; 31 printk(KERN_CONT "Internal(%u.%uMHz)", 32 (pciclk + 50000) / 1000000, 33 ((pciclk + 50000) / 100000) % 10); 34 } else { 35 printk(KERN_CONT "External"); 36 pciclk = -1; 37 } 38 printk(KERN_CONT "\n"); 39 return pciclk; 40} 41 42void __init tx4939_report_pci1clk(void) 43{ 44 unsigned int pciclk = txx9_master_clock * 20 / 6; 45 46 pr_info("PCIC1 -- PCICLK:%u.%uMHz\n", 47 (pciclk + 50000) / 1000000, 48 ((pciclk + 50000) / 100000) % 10); 49} 50 51int __init tx4939_pcic1_map_irq(const struct pci_dev *dev, u8 slot) 52{ 53 if (get_tx4927_pcicptr(dev->bus->sysdata) == tx4939_pcic1ptr) { 54 switch (slot) { 55 case TX4927_PCIC_IDSEL_AD_TO_SLOT(31): 56 if (__raw_readq(&tx4939_ccfgptr->pcfg) & 57 TX4939_PCFG_ET0MODE) 58 return TXX9_IRQ_BASE + TX4939_IR_ETH(0); 59 break; 60 case TX4927_PCIC_IDSEL_AD_TO_SLOT(30): 61 if (__raw_readq(&tx4939_ccfgptr->pcfg) & 62 TX4939_PCFG_ET1MODE) 63 return TXX9_IRQ_BASE + TX4939_IR_ETH(1); 64 break; 65 } 66 return 0; 67 } 68 return -1; 69} 70 71int __init tx4939_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) 72{ 73 int irq = tx4939_pcic1_map_irq(dev, slot); 74 75 if (irq >= 0) 76 return irq; 77 irq = pin; 78 /* IRQ rotation */ 79 irq--; /* 0-3 */ 80 irq = (irq + 33 - slot) % 4; 81 irq++; /* 1-4 */ 82 83 switch (irq) { 84 case 1: 85 irq = TXX9_IRQ_BASE + TX4939_IR_INTA; 86 break; 87 case 2: 88 irq = TXX9_IRQ_BASE + TX4939_IR_INTB; 89 break; 90 case 3: 91 irq = TXX9_IRQ_BASE + TX4939_IR_INTC; 92 break; 93 case 4: 94 irq = TXX9_IRQ_BASE + TX4939_IR_INTD; 95 break; 96 } 97 return irq; 98} 99 100void __init tx4939_setup_pcierr_irq(void) 101{ 102 if (request_irq(TXX9_IRQ_BASE + TX4939_IR_PCIERR, 103 tx4927_pcierr_interrupt, 104 IRQF_DISABLED, "PCI error", 105 (void *)TX4939_PCIC_REG)) 106 pr_warning("Failed to request irq for PCIERR\n"); 107} 108