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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 | } |