| Atsushi Nemoto | 0dcdbe6 | 2008-09-01 22:22:39 +0900 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/mips/pci/pci-tx4939.c |
| 3 | * |
| 4 | * Based on linux/arch/mips/txx9/rbtx4939/setup.c, |
| 5 | * and RBTX49xx patch from CELF patch archive. |
| 6 | * |
| 7 | * Copyright 2001, 2003-2005 MontaVista Software Inc. |
| 8 | * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org) |
| 9 | * (C) Copyright TOSHIBA CORPORATION 2000-2001, 2004-2007 |
| 10 | * |
| 11 | * This file is subject to the terms and conditions of the GNU General Public |
| 12 | * License. See the file "COPYING" in the main directory of this archive |
| 13 | * for more details. |
| 14 | */ |
| 15 | #include <linux/init.h> |
| 16 | #include <linux/pci.h> |
| 17 | #include <linux/kernel.h> |
| 18 | #include <linux/interrupt.h> |
| 19 | #include <asm/txx9/generic.h> |
| 20 | #include <asm/txx9/tx4939.h> |
| 21 | |
| 22 | int __init tx4939_report_pciclk(void) |
| 23 | { |
| 24 | int pciclk = 0; |
| 25 | |
| 26 | pr_info("PCIC --%s PCICLK:", |
| 27 | (__raw_readq(&tx4939_ccfgptr->ccfg) & TX4939_CCFG_PCI66) ? |
| 28 | " PCI66" : ""); |
| 29 | if (__raw_readq(&tx4939_ccfgptr->pcfg) & TX4939_PCFG_PCICLKEN_ALL) { |
| 30 | pciclk = txx9_master_clock * 20 / 6; |
| 31 | if (!(__raw_readq(&tx4939_ccfgptr->ccfg) & TX4939_CCFG_PCI66)) |
| 32 | pciclk /= 2; |
| 33 | printk(KERN_CONT "Internal(%u.%uMHz)", |
| 34 | (pciclk + 50000) / 1000000, |
| 35 | ((pciclk + 50000) / 100000) % 10); |
| 36 | } else { |
| 37 | printk(KERN_CONT "External"); |
| 38 | pciclk = -1; |
| 39 | } |
| 40 | printk(KERN_CONT "\n"); |
| 41 | return pciclk; |
| 42 | } |
| 43 | |
| 44 | void __init tx4939_report_pci1clk(void) |
| 45 | { |
| 46 | unsigned int pciclk = txx9_master_clock * 20 / 6; |
| 47 | |
| 48 | pr_info("PCIC1 -- PCICLK:%u.%uMHz\n", |
| 49 | (pciclk + 50000) / 1000000, |
| 50 | ((pciclk + 50000) / 100000) % 10); |
| 51 | } |
| 52 | |
| 53 | int __init tx4939_pcic1_map_irq(const struct pci_dev *dev, u8 slot) |
| 54 | { |
| 55 | if (get_tx4927_pcicptr(dev->bus->sysdata) == tx4939_pcic1ptr) { |
| 56 | switch (slot) { |
| 57 | case TX4927_PCIC_IDSEL_AD_TO_SLOT(31): |
| 58 | if (__raw_readq(&tx4939_ccfgptr->pcfg) & |
| 59 | TX4939_PCFG_ET0MODE) |
| 60 | return TXX9_IRQ_BASE + TX4939_IR_ETH(0); |
| 61 | break; |
| 62 | case TX4927_PCIC_IDSEL_AD_TO_SLOT(30): |
| 63 | if (__raw_readq(&tx4939_ccfgptr->pcfg) & |
| 64 | TX4939_PCFG_ET1MODE) |
| 65 | return TXX9_IRQ_BASE + TX4939_IR_ETH(1); |
| 66 | break; |
| 67 | } |
| 68 | return 0; |
| 69 | } |
| 70 | return -1; |
| 71 | } |
| 72 | |
| 73 | int __init tx4939_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) |
| 74 | { |
| 75 | int irq = tx4939_pcic1_map_irq(dev, slot); |
| 76 | |
| 77 | if (irq >= 0) |
| 78 | return irq; |
| 79 | irq = pin; |
| 80 | /* IRQ rotation */ |
| 81 | irq--; /* 0-3 */ |
| 82 | irq = (irq + 33 - slot) % 4; |
| 83 | irq++; /* 1-4 */ |
| 84 | |
| 85 | switch (irq) { |
| 86 | case 1: |
| 87 | irq = TXX9_IRQ_BASE + TX4939_IR_INTA; |
| 88 | break; |
| 89 | case 2: |
| 90 | irq = TXX9_IRQ_BASE + TX4939_IR_INTB; |
| 91 | break; |
| 92 | case 3: |
| 93 | irq = TXX9_IRQ_BASE + TX4939_IR_INTC; |
| 94 | break; |
| 95 | case 4: |
| 96 | irq = TXX9_IRQ_BASE + TX4939_IR_INTD; |
| 97 | break; |
| 98 | } |
| 99 | return irq; |
| 100 | } |
| 101 | |
| 102 | void __init tx4939_setup_pcierr_irq(void) |
| 103 | { |
| 104 | if (request_irq(TXX9_IRQ_BASE + TX4939_IR_PCIERR, |
| 105 | tx4927_pcierr_interrupt, |
| 106 | IRQF_DISABLED, "PCI error", |
| 107 | (void *)TX4939_PCIC_REG)) |
| 108 | pr_warning("Failed to request irq for PCIERR\n"); |
| 109 | } |