1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * the EHCI 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_ehci_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_EHCI), &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_EHCI), 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_EHCI_FLAG;
46 _wrmsr(GLCP_MSR_REG(GLCP_SOFT_COM), hi, lo);
47 } else if ((value & 0x01) == 0x00) {
48 _rdmsr(USB_MSR_REG(USB_EHCI), &hi, &lo);
49 lo = value;
50 _wrmsr(USB_MSR_REG(USB_EHCI), 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_BM4), hi, lo);
56 }
57 break;
58 case PCI_EHCI_LEGSMIEN_REG:
59 _rdmsr(USB_MSR_REG(USB_EHCI), &hi, &lo);
60 hi &= 0x003f0000;
61 hi |= (value & 0x3f) << 16;
62 _wrmsr(USB_MSR_REG(USB_EHCI), hi, lo);
63 break;
64 case PCI_EHCI_FLADJ_REG:
65 _rdmsr(USB_MSR_REG(USB_EHCI), &hi, &lo);
66 hi &= ~0x00003f00;
67 hi |= value & 0x00003f00;
68 _wrmsr(USB_MSR_REG(USB_EHCI), hi, lo);
69 break;
70 default:
71 break;
72 }
73}
74
75u32 pci_ehci_read_reg(int reg)
76{
77 u32 conf_data = 0;
78 u32 hi, lo;
79
80 switch (reg) {
81 case PCI_VENDOR_ID:
82 conf_data =
83 CFG_PCI_VENDOR_ID(CS5536_EHCI_DEVICE_ID, CS5536_VENDOR_ID);
84 break;
85 case PCI_COMMAND:
86 _rdmsr(USB_MSR_REG(USB_EHCI), &hi, &lo);
87 if (hi & PCI_COMMAND_MASTER)
88 conf_data |= PCI_COMMAND_MASTER;
89 if (hi & PCI_COMMAND_MEMORY)
90 conf_data |= PCI_COMMAND_MEMORY;
91 break;
92 case PCI_STATUS:
93 conf_data |= PCI_STATUS_66MHZ;
94 conf_data |= PCI_STATUS_FAST_BACK;
95 _rdmsr(SB_MSR_REG(SB_ERROR), &hi, &lo);
96 if (lo & SB_PARE_ERR_FLAG)
97 conf_data |= PCI_STATUS_PARITY;
98 conf_data |= PCI_STATUS_DEVSEL_MEDIUM;
99 break;
100 case PCI_CLASS_REVISION:
101 _rdmsr(USB_MSR_REG(USB_CAP), &hi, &lo);
102 conf_data = lo & 0x000000ff;
103 conf_data |= (CS5536_EHCI_CLASS_CODE << 8);
104 break;
105 case PCI_CACHE_LINE_SIZE:
106 conf_data =
107 CFG_PCI_CACHE_LINE_SIZE(PCI_NORMAL_HEADER_TYPE,
108 PCI_NORMAL_LATENCY_TIMER);
109 break;
110 case PCI_BAR0_REG:
111 _rdmsr(GLCP_MSR_REG(GLCP_SOFT_COM), &hi, &lo);
112 if (lo & SOFT_BAR_EHCI_FLAG) {
113 conf_data = CS5536_EHCI_RANGE |
114 PCI_BASE_ADDRESS_SPACE_MEMORY;
115 lo &= ~SOFT_BAR_EHCI_FLAG;
116 _wrmsr(GLCP_MSR_REG(GLCP_SOFT_COM), hi, lo);
117 } else {
118 _rdmsr(USB_MSR_REG(USB_EHCI), &hi, &lo);
119 conf_data = lo & 0xfffff000;
120 }
121 break;
122 case PCI_CARDBUS_CIS:
123 conf_data = PCI_CARDBUS_CIS_POINTER;
124 break;
125 case PCI_SUBSYSTEM_VENDOR_ID:
126 conf_data =
127 CFG_PCI_VENDOR_ID(CS5536_EHCI_SUB_ID, CS5536_SUB_VENDOR_ID);
128 break;
129 case PCI_ROM_ADDRESS:
130 conf_data = PCI_EXPANSION_ROM_BAR;
131 break;
132 case PCI_CAPABILITY_LIST:
133 conf_data = PCI_CAPLIST_USB_POINTER;
134 break;
135 case PCI_INTERRUPT_LINE:
136 conf_data =
137 CFG_PCI_INTERRUPT_LINE(PCI_DEFAULT_PIN, CS5536_USB_INTR);
138 break;
139 case PCI_EHCI_LEGSMIEN_REG:
140 _rdmsr(USB_MSR_REG(USB_EHCI), &hi, &lo);
141 conf_data = (hi & 0x003f0000) >> 16;
142 break;
143 case PCI_EHCI_LEGSMISTS_REG:
144 _rdmsr(USB_MSR_REG(USB_EHCI), &hi, &lo);
145 conf_data = (hi & 0x3f000000) >> 24;
146 break;
147 case PCI_EHCI_FLADJ_REG:
148 _rdmsr(USB_MSR_REG(USB_EHCI), &hi, &lo);
149 conf_data = hi & 0x00003f00;
150 break;
151 default:
152 break;
153 }
154
155 return conf_data;
156}
157

source code of linux/arch/mips/loongson2ef/common/cs5536/cs5536_ehci.c