projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 0dcdbe6a AN |
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 | } |