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
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2008 Lemote Technology
* Copyright (C) 2004 ICT CAS
* Author: Li xiaoyu, lixy@ict.ac.cn
*
* Copyright (C) 2007 Lemote, Inc.
* Author: Fuxin Zhang, zhangfx@lemote.com
*/
#include <linux/init.h>
#include <linux/pci.h>
#include <loongson.h>
#include <cs5536/cs5536.h>
#include <cs5536/cs5536_pci.h>
/* PCI interrupt pins
*
* These should not be changed, or you should consider loongson2f interrupt
* register and your pci card dispatch
*/
#define PCIA 4
#define PCIB 5
#define PCIC 6
#define PCID 7
/* all the pci device has the PCIA pin, check the datasheet. */
static char irq_tab[][5] = {
/* INTA INTB INTC INTD */
{0, 0, 0, 0, 0}, /* 11: Unused */
{0, 0, 0, 0, 0}, /* 12: Unused */
{0, 0, 0, 0, 0}, /* 13: Unused */
{0, 0, 0, 0, 0}, /* 14: Unused */
{0, 0, 0, 0, 0}, /* 15: Unused */
{0, 0, 0, 0, 0}, /* 16: Unused */
{0, PCIA, 0, 0, 0}, /* 17: RTL8110-0 */
{0, PCIB, 0, 0, 0}, /* 18: RTL8110-1 */
{0, PCIC, 0, 0, 0}, /* 19: SiI3114 */
{0, PCID, 0, 0, 0}, /* 20: 3-ports nec usb */
{0, PCIA, PCIB, PCIC, PCID}, /* 21: PCI-SLOT */
{0, 0, 0, 0, 0}, /* 22: Unused */
{0, 0, 0, 0, 0}, /* 23: Unused */
{0, 0, 0, 0, 0}, /* 24: Unused */
{0, 0, 0, 0, 0}, /* 25: Unused */
{0, 0, 0, 0, 0}, /* 26: Unused */
{0, 0, 0, 0, 0}, /* 27: Unused */
};
int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
int virq;
if ((PCI_SLOT(dev->devfn) != PCI_IDSEL_CS5536)
&& (PCI_SLOT(dev->devfn) < 32)) {
virq = irq_tab[slot][pin];
printk(KERN_INFO "slot: %d, pin: %d, irq: %d\n", slot, pin,
virq + LOONGSON_IRQ_BASE);
if (virq != 0)
return LOONGSON_IRQ_BASE + virq;
else
return 0;
} else if (PCI_SLOT(dev->devfn) == PCI_IDSEL_CS5536) { /* cs5536 */
switch (PCI_FUNC(dev->devfn)) {
case 2:
pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
CS5536_IDE_INTR);
return CS5536_IDE_INTR; /* for IDE */
case 3:
pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
CS5536_ACC_INTR);
return CS5536_ACC_INTR; /* for AUDIO */
case 4: /* for OHCI */
case 5: /* for EHCI */
case 6: /* for UDC */
case 7: /* for OTG */
pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
CS5536_USB_INTR);
return CS5536_USB_INTR;
}
return dev->irq;
} else {
printk(KERN_INFO " strange pci slot number.\n");
return 0;
}
}
/* Do platform specific device initialization at pci_enable_device() time */
int pcibios_plat_dev_init(struct pci_dev *dev)
{
return 0;
}
/* CS5536 SPEC. fixup */
static void loongson_cs5536_isa_fixup(struct pci_dev *pdev)
{
/* the uart1 and uart2 interrupt in PIC is enabled as default */
pci_write_config_dword(pdev, PCI_UART1_INT_REG, 1);
pci_write_config_dword(pdev, PCI_UART2_INT_REG, 1);
}
static void loongson_cs5536_ide_fixup(struct pci_dev *pdev)
{
/* setting the mutex pin as IDE function */
pci_write_config_dword(pdev, PCI_IDE_CFG_REG,
CS5536_IDE_FLASH_SIGNATURE);
}
static void loongson_cs5536_acc_fixup(struct pci_dev *pdev)
{
/* enable the AUDIO interrupt in PIC */
pci_write_config_dword(pdev, PCI_ACC_INT_REG, 1);
pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xc0);
}
static void loongson_cs5536_ohci_fixup(struct pci_dev *pdev)
{
/* enable the OHCI interrupt in PIC */
/* THE OHCI, EHCI, UDC, OTG are shared with interrupt in PIC */
pci_write_config_dword(pdev, PCI_OHCI_INT_REG, 1);
}
static void loongson_cs5536_ehci_fixup(struct pci_dev *pdev)
{
u32 hi, lo;
/* Serial short detect enable */
_rdmsr(USB_MSR_REG(USB_CONFIG), &hi, &lo);
_wrmsr(USB_MSR_REG(USB_CONFIG), (1 << 1) | (1 << 3), lo);
/* setting the USB2.0 micro frame length */
pci_write_config_dword(pdev, PCI_EHCI_FLADJ_REG, 0x2000);
}
static void loongson_nec_fixup(struct pci_dev *pdev)
{
unsigned int val;
pci_read_config_dword(pdev, 0xe0, &val);
/* Only 2 port be used */
pci_write_config_dword(pdev, 0xe0, (val & ~3) | 0x2);
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA,
loongson_cs5536_isa_fixup);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_OHC,
loongson_cs5536_ohci_fixup);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_EHC,
loongson_cs5536_ehci_fixup);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_AUDIO,
loongson_cs5536_acc_fixup);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_IDE,
loongson_cs5536_ide_fixup);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB,
loongson_nec_fixup);
|
