Gitiles
Code Review Sign In
LeafOS / LeafOS-Devices / android_kernel_samsung_gta4xl / 67b5db6502ddd27d65dea43bf036abbd82d0dfc9 / . / arch / mips / pci / pci-tx4938.c
blob: 1ea257bc3b8faafc0bd8dae93198f67d645f6dba [file] [log] [blame]
Atsushi Nemoto89d63fe2008-07-11 00:33:08 +0900[diff] [blame]1/*
2 * linux/arch/mips/pci/pci-tx4938.c
3 *
4 * Based on linux/arch/mips/txx9/rbtx4938/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>
Atsushi Nemoto455cc252008-07-25 23:01:35 +0900[diff] [blame]18#include <linux/interrupt.h>
Atsushi Nemoto89d63fe2008-07-11 00:33:08 +0900[diff] [blame]19#include <asm/txx9/generic.h>
20#include <asm/txx9/tx4938.h>
21
22int __init tx4938_report_pciclk(void)
23{
24 int pciclk = 0;
25
26 printk(KERN_INFO "PCIC --%s PCICLK:",
27 (__raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_PCI66) ?
28 " PCI66" : "");
29 if (__raw_readq(&tx4938_ccfgptr->pcfg) & TX4938_PCFG_PCICLKEN_ALL) {
30 u64 ccfg = __raw_readq(&tx4938_ccfgptr->ccfg);
31 switch ((unsigned long)ccfg &
32 TX4938_CCFG_PCIDIVMODE_MASK) {
33 case TX4938_CCFG_PCIDIVMODE_4:
34 pciclk = txx9_cpu_clock / 4; break;
35 case TX4938_CCFG_PCIDIVMODE_4_5:
36 pciclk = txx9_cpu_clock * 2 / 9; break;
37 case TX4938_CCFG_PCIDIVMODE_5:
38 pciclk = txx9_cpu_clock / 5; break;
39 case TX4938_CCFG_PCIDIVMODE_5_5:
40 pciclk = txx9_cpu_clock * 2 / 11; break;
41 case TX4938_CCFG_PCIDIVMODE_8:
42 pciclk = txx9_cpu_clock / 8; break;
43 case TX4938_CCFG_PCIDIVMODE_9:
44 pciclk = txx9_cpu_clock / 9; break;
45 case TX4938_CCFG_PCIDIVMODE_10:
46 pciclk = txx9_cpu_clock / 10; break;
47 case TX4938_CCFG_PCIDIVMODE_11:
48 pciclk = txx9_cpu_clock / 11; break;
49 }
50 printk("Internal(%u.%uMHz)",
51 (pciclk + 50000) / 1000000,
52 ((pciclk + 50000) / 100000) % 10);
53 } else {
54 printk("External");
55 pciclk = -1;
56 }
57 printk("\n");
58 return pciclk;
59}
60
61void __init tx4938_report_pci1clk(void)
62{
63 __u64 ccfg = __raw_readq(&tx4938_ccfgptr->ccfg);
64 unsigned int pciclk =
65 txx9_gbus_clock / ((ccfg & TX4938_CCFG_PCI1DMD) ? 4 : 2);
66
67 printk(KERN_INFO "PCIC1 -- %sPCICLK:%u.%uMHz\n",
68 (ccfg & TX4938_CCFG_PCI1_66) ? "PCI66 " : "",
69 (pciclk + 50000) / 1000000,
70 ((pciclk + 50000) / 100000) % 10);
71}
72
73int __init tx4938_pciclk66_setup(void)
74{
75 int pciclk;
76
77 /* Assert M66EN */
78 tx4938_ccfg_set(TX4938_CCFG_PCI66);
79 /* Double PCICLK (if possible) */
80 if (__raw_readq(&tx4938_ccfgptr->pcfg) & TX4938_PCFG_PCICLKEN_ALL) {
81 unsigned int pcidivmode = 0;
82 u64 ccfg = __raw_readq(&tx4938_ccfgptr->ccfg);
83 pcidivmode = (unsigned long)ccfg &
84 TX4938_CCFG_PCIDIVMODE_MASK;
85 switch (pcidivmode) {
86 case TX4938_CCFG_PCIDIVMODE_8:
87 case TX4938_CCFG_PCIDIVMODE_4:
88 pcidivmode = TX4938_CCFG_PCIDIVMODE_4;
89 pciclk = txx9_cpu_clock / 4;
90 break;
91 case TX4938_CCFG_PCIDIVMODE_9:
92 case TX4938_CCFG_PCIDIVMODE_4_5:
93 pcidivmode = TX4938_CCFG_PCIDIVMODE_4_5;
94 pciclk = txx9_cpu_clock * 2 / 9;
95 break;
96 case TX4938_CCFG_PCIDIVMODE_10:
97 case TX4938_CCFG_PCIDIVMODE_5:
98 pcidivmode = TX4938_CCFG_PCIDIVMODE_5;
99 pciclk = txx9_cpu_clock / 5;
100 break;
101 case TX4938_CCFG_PCIDIVMODE_11:
102 case TX4938_CCFG_PCIDIVMODE_5_5:
103 default:
104 pcidivmode = TX4938_CCFG_PCIDIVMODE_5_5;
105 pciclk = txx9_cpu_clock * 2 / 11;
106 break;
107 }
108 tx4938_ccfg_change(TX4938_CCFG_PCIDIVMODE_MASK,
109 pcidivmode);
110 printk(KERN_DEBUG "PCICLK: ccfg:%08lx\n",
111 (unsigned long)__raw_readq(&tx4938_ccfgptr->ccfg));
112 } else
113 pciclk = -1;
114 return pciclk;
115}
116
Atsushi Nemotoee25d332008-08-19 22:55:17 +0900[diff] [blame]117int __init tx4938_pcic1_map_irq(const struct pci_dev *dev, u8 slot)
Atsushi Nemoto89d63fe2008-07-11 00:33:08 +0900[diff] [blame]118{
119 if (get_tx4927_pcicptr(dev->bus->sysdata) == tx4938_pcic1ptr) {
120 switch (slot) {
121 case TX4927_PCIC_IDSEL_AD_TO_SLOT(31):
122 if (__raw_readq(&tx4938_ccfgptr->pcfg) &
123 TX4938_PCFG_ETH0_SEL)
124 return TXX9_IRQ_BASE + TX4938_IR_ETH0;
125 break;
126 case TX4927_PCIC_IDSEL_AD_TO_SLOT(30):
127 if (__raw_readq(&tx4938_ccfgptr->pcfg) &
128 TX4938_PCFG_ETH1_SEL)
129 return TXX9_IRQ_BASE + TX4938_IR_ETH1;
130 break;
131 }
132 return 0;
133 }
134 return -1;
135}
Atsushi Nemoto455cc252008-07-25 23:01:35 +0900[diff] [blame]136
137void __init tx4938_setup_pcierr_irq(void)
138{
139 if (request_irq(TXX9_IRQ_BASE + TX4938_IR_PCIERR,
140 tx4927_pcierr_interrupt,
141 IRQF_DISABLED, "PCI error",
142 (void *)TX4927_PCIC_REG))
143 printk(KERN_WARNING "Failed to request irq for PCIERR\n");
144}