1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * the OHCI Virtual Support Module of AMD CS5536
4 *
5 * Copyright (C) 2007 Lemote, Inc.
6 * Author : jlliu, liujl@lemote.com
7 *
8 * Copyright (C) 2009 Lemote, Inc.
9 * Author: Wu Zhangjin, wuzhangjin@gmail.com
10 */
11
12#include <cs5536/cs5536.h>
13#include <cs5536/cs5536_pci.h>
14
15void pci_ohci_write_reg(int reg, u32 value)
16{
17 u32 hi = 0, lo = value;
18
19 switch (reg) {
20 case PCI_COMMAND:
21 _rdmsr(USB_MSR_REG(USB_OHCI), &hi, &lo);
22 if (value & PCI_COMMAND_MASTER)
23 hi |= PCI_COMMAND_MASTER;
24 else
25 hi &= ~PCI_COMMAND_MASTER;
26
27 if (value & PCI_COMMAND_MEMORY)
28 hi |= PCI_COMMAND_MEMORY;
29 else
30 hi &= ~PCI_COMMAND_MEMORY;
31 _wrmsr(USB_MSR_REG(USB_OHCI), hi, lo);
32 break;
33 case PCI_STATUS:
34 if (value & PCI_STATUS_PARITY) {
35 _rdmsr(SB_MSR_REG(SB_ERROR), &hi, &lo);
36 if (lo & SB_PARE_ERR_FLAG) {
37 lo = (lo & 0x0000ffff) | SB_PARE_ERR_FLAG;
38 _wrmsr(SB_MSR_REG(SB_ERROR), hi, lo);
39 }
40 }
41 break;
42 case PCI_BAR0_REG:
43 if (value == PCI_BAR_RANGE_MASK) {
44 _rdmsr(GLCP_MSR_REG(GLCP_SOFT_COM), &hi, &lo);
45 lo |= SOFT_BAR_OHCI_FLAG;
46 _wrmsr(GLCP_MSR_REG(GLCP_SOFT_COM), hi, lo);
47 } else if ((value & 0x01) == 0x00) {
48 _rdmsr(USB_MSR_REG(USB_OHCI), &hi, &lo);
49 lo = value;
50 _wrmsr(USB_MSR_REG(USB_OHCI), hi, lo);
51
52 value &= 0xfffffff0;
53 hi = 0x40000000 | ((value & 0xff000000) >> 24);
54 lo = 0x000fffff | ((value & 0x00fff000) << 8);
55 _wrmsr(GLIU_MSR_REG(GLIU_P2D_BM3), hi, lo);
56 }
57 break;
58 case PCI_OHCI_INT_REG:
59 _rdmsr(DIVIL_MSR_REG(PIC_YSEL_LOW), &hi, &lo);
60 lo &= ~(0xf << PIC_YSEL_LOW_USB_SHIFT);
61 if (value) /* enable all the usb interrupt in PIC */
62 lo |= (CS5536_USB_INTR << PIC_YSEL_LOW_USB_SHIFT);
63 _wrmsr(DIVIL_MSR_REG(PIC_YSEL_LOW), hi, lo);
64 break;
65 default:
66 break;
67 }
68}
69
70u32 pci_ohci_read_reg(int reg)
71{
72 u32 conf_data = 0;
73 u32 hi, lo;
74
75 switch (reg) {
76 case PCI_VENDOR_ID:
77 conf_data =
78 CFG_PCI_VENDOR_ID(CS5536_OHCI_DEVICE_ID, CS5536_VENDOR_ID);
79 break;
80 case PCI_COMMAND:
81 _rdmsr(USB_MSR_REG(USB_OHCI), &hi, &lo);
82 if (hi & PCI_COMMAND_MASTER)
83 conf_data |= PCI_COMMAND_MASTER;
84 if (hi & PCI_COMMAND_MEMORY)
85 conf_data |= PCI_COMMAND_MEMORY;
86 break;
87 case PCI_STATUS:
88 conf_data |= PCI_STATUS_66MHZ;
89 conf_data |= PCI_STATUS_FAST_BACK;
90 _rdmsr(SB_MSR_REG(SB_ERROR), &hi, &lo);
91 if (lo & SB_PARE_ERR_FLAG)
92 conf_data |= PCI_STATUS_PARITY;
93 conf_data |= PCI_STATUS_DEVSEL_MEDIUM;
94 break;
95 case PCI_CLASS_REVISION:
96 _rdmsr(USB_MSR_REG(USB_CAP), &hi, &lo);
97 conf_data = lo & 0x000000ff;
98 conf_data |= (CS5536_OHCI_CLASS_CODE << 8);
99 break;
100 case PCI_CACHE_LINE_SIZE:
101 conf_data =
102 CFG_PCI_CACHE_LINE_SIZE(PCI_NORMAL_HEADER_TYPE,
103 PCI_NORMAL_LATENCY_TIMER);
104 break;
105 case PCI_BAR0_REG:
106 _rdmsr(GLCP_MSR_REG(GLCP_SOFT_COM), &hi, &lo);
107 if (lo & SOFT_BAR_OHCI_FLAG) {
108 conf_data = CS5536_OHCI_RANGE |
109 PCI_BASE_ADDRESS_SPACE_MEMORY;
110 lo &= ~SOFT_BAR_OHCI_FLAG;
111 _wrmsr(GLCP_MSR_REG(GLCP_SOFT_COM), hi, lo);
112 } else {
113 _rdmsr(USB_MSR_REG(USB_OHCI), &hi, &lo);
114 conf_data = lo & 0xffffff00;
115 conf_data &= ~0x0000000f; /* 32bit mem */
116 }
117 break;
118 case PCI_CARDBUS_CIS:
119 conf_data = PCI_CARDBUS_CIS_POINTER;
120 break;
121 case PCI_SUBSYSTEM_VENDOR_ID:
122 conf_data =
123 CFG_PCI_VENDOR_ID(CS5536_OHCI_SUB_ID, CS5536_SUB_VENDOR_ID);
124 break;
125 case PCI_ROM_ADDRESS:
126 conf_data = PCI_EXPANSION_ROM_BAR;
127 break;
128 case PCI_CAPABILITY_LIST:
129 conf_data = PCI_CAPLIST_USB_POINTER;
130 break;
131 case PCI_INTERRUPT_LINE:
132 conf_data =
133 CFG_PCI_INTERRUPT_LINE(PCI_DEFAULT_PIN, CS5536_USB_INTR);
134 break;
135 case PCI_OHCI_INT_REG:
136 _rdmsr(DIVIL_MSR_REG(PIC_YSEL_LOW), &hi, &lo);
137 if (((lo >> PIC_YSEL_LOW_USB_SHIFT) & 0xf) == CS5536_USB_INTR)
138 conf_data = 1;
139 break;
140 default:
141 break;
142 }
143
144 return conf_data;
145}
146

source code of linux/arch/mips/loongson2ef/common/cs5536/cs5536_ohci.c