1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/*
* Based on linux/arch/mips/txx9/rbtx4938/setup.c,
* and RBTX49xx patch from CELF patch archive.
*
* Copyright 2001, 2003-2005 MontaVista Software Inc.
* Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org)
* (C) Copyright TOSHIBA CORPORATION 2000-2001, 2004-2007
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <asm/txx9/generic.h>
#include <asm/txx9/tx4938.h>
int __init tx4938_report_pciclk(void)
{
int pciclk = 0;
pr_info("PCIC --%s PCICLK:",
(__raw_readq(&tx4938_ccfgptr->ccfg) & TX4938_CCFG_PCI66) ?
" PCI66" : "");
if (__raw_readq(&tx4938_ccfgptr->pcfg) & TX4938_PCFG_PCICLKEN_ALL) {
u64 ccfg = __raw_readq(&tx4938_ccfgptr->ccfg);
switch ((unsigned long)ccfg &
TX4938_CCFG_PCIDIVMODE_MASK) {
case TX4938_CCFG_PCIDIVMODE_4:
pciclk = txx9_cpu_clock / 4; break;
case TX4938_CCFG_PCIDIVMODE_4_5:
pciclk = txx9_cpu_clock * 2 / 9; break;
case TX4938_CCFG_PCIDIVMODE_5:
pciclk = txx9_cpu_clock / 5; break;
case TX4938_CCFG_PCIDIVMODE_5_5:
pciclk = txx9_cpu_clock * 2 / 11; break;
case TX4938_CCFG_PCIDIVMODE_8:
pciclk = txx9_cpu_clock / 8; break;
case TX4938_CCFG_PCIDIVMODE_9:
pciclk = txx9_cpu_clock / 9; break;
case TX4938_CCFG_PCIDIVMODE_10:
pciclk = txx9_cpu_clock / 10; break;
case TX4938_CCFG_PCIDIVMODE_11:
pciclk = txx9_cpu_clock / 11; break;
}
pr_cont("Internal(%u.%uMHz)",
(pciclk + 50000) / 1000000,
((pciclk + 50000) / 100000) % 10);
} else {
pr_cont("External");
pciclk = -1;
}
pr_cont("\n");
return pciclk;
}
void __init tx4938_report_pci1clk(void)
{
__u64 ccfg = __raw_readq(&tx4938_ccfgptr->ccfg);
unsigned int pciclk =
txx9_gbus_clock / ((ccfg & TX4938_CCFG_PCI1DMD) ? 4 : 2);
pr_info("PCIC1 -- %sPCICLK:%u.%uMHz\n",
(ccfg & TX4938_CCFG_PCI1_66) ? "PCI66 " : "",
(pciclk + 50000) / 1000000,
((pciclk + 50000) / 100000) % 10);
}
int __init tx4938_pciclk66_setup(void)
{
int pciclk;
/* Assert M66EN */
tx4938_ccfg_set(TX4938_CCFG_PCI66);
/* Double PCICLK (if possible) */
if (__raw_readq(&tx4938_ccfgptr->pcfg) & TX4938_PCFG_PCICLKEN_ALL) {
unsigned int pcidivmode = 0;
u64 ccfg = __raw_readq(&tx4938_ccfgptr->ccfg);
pcidivmode = (unsigned long)ccfg &
TX4938_CCFG_PCIDIVMODE_MASK;
switch (pcidivmode) {
case TX4938_CCFG_PCIDIVMODE_8:
case TX4938_CCFG_PCIDIVMODE_4:
pcidivmode = TX4938_CCFG_PCIDIVMODE_4;
pciclk = txx9_cpu_clock / 4;
break;
case TX4938_CCFG_PCIDIVMODE_9:
case TX4938_CCFG_PCIDIVMODE_4_5:
pcidivmode = TX4938_CCFG_PCIDIVMODE_4_5;
pciclk = txx9_cpu_clock * 2 / 9;
break;
case TX4938_CCFG_PCIDIVMODE_10:
case TX4938_CCFG_PCIDIVMODE_5:
pcidivmode = TX4938_CCFG_PCIDIVMODE_5;
pciclk = txx9_cpu_clock / 5;
break;
case TX4938_CCFG_PCIDIVMODE_11:
case TX4938_CCFG_PCIDIVMODE_5_5:
default:
pcidivmode = TX4938_CCFG_PCIDIVMODE_5_5;
pciclk = txx9_cpu_clock * 2 / 11;
break;
}
tx4938_ccfg_change(TX4938_CCFG_PCIDIVMODE_MASK,
pcidivmode);
pr_debug("PCICLK: ccfg:%08lx\n",
(unsigned long)__raw_readq(&tx4938_ccfgptr->ccfg));
} else
pciclk = -1;
return pciclk;
}
int tx4938_pcic1_map_irq(const struct pci_dev *dev, u8 slot)
{
if (get_tx4927_pcicptr(dev->bus->sysdata) == tx4938_pcic1ptr) {
switch (slot) {
case TX4927_PCIC_IDSEL_AD_TO_SLOT(31):
if (__raw_readq(&tx4938_ccfgptr->pcfg) &
TX4938_PCFG_ETH0_SEL)
return TXX9_IRQ_BASE + TX4938_IR_ETH0;
break;
case TX4927_PCIC_IDSEL_AD_TO_SLOT(30):
if (__raw_readq(&tx4938_ccfgptr->pcfg) &
TX4938_PCFG_ETH1_SEL)
return TXX9_IRQ_BASE + TX4938_IR_ETH1;
break;
}
return 0;
}
return -1;
}
void __init tx4938_setup_pcierr_irq(void)
{
if (request_irq(TXX9_IRQ_BASE + TX4938_IR_PCIERR,
tx4927_pcierr_interrupt,
0, "PCI error",
(void *)TX4927_PCIC_REG))
pr_warn("Failed to request irq for PCIERR\n");
}
|
