Commit | Line | Data |
---|---|---|
b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
9c057b3e HC |
2 | #include <linux/io.h> |
3 | #include <linux/init.h> | |
4 | #include <linux/ioport.h> | |
5 | #include <linux/export.h> | |
6 | ||
7 | #define SBX00_ACPI_IO_BASE 0x800 | |
8 | #define SBX00_ACPI_IO_SIZE 0x100 | |
9 | ||
10 | #define ACPI_PM_EVT_BLK (SBX00_ACPI_IO_BASE + 0x00) /* 4 bytes */ | |
11 | #define ACPI_PM_CNT_BLK (SBX00_ACPI_IO_BASE + 0x04) /* 2 bytes */ | |
12 | #define ACPI_PMA_CNT_BLK (SBX00_ACPI_IO_BASE + 0x0F) /* 1 byte */ | |
13 | #define ACPI_PM_TMR_BLK (SBX00_ACPI_IO_BASE + 0x18) /* 4 bytes */ | |
14 | #define ACPI_GPE0_BLK (SBX00_ACPI_IO_BASE + 0x10) /* 8 bytes */ | |
15 | #define ACPI_END (SBX00_ACPI_IO_BASE + 0x80) | |
16 | ||
17 | #define PM_INDEX 0xCD6 | |
18 | #define PM_DATA 0xCD7 | |
19 | #define PM2_INDEX 0xCD0 | |
20 | #define PM2_DATA 0xCD1 | |
21 | ||
22 | /* | |
23 | * SCI interrupt need acpi space, allocate here | |
24 | */ | |
25 | ||
26 | static int __init register_acpi_resource(void) | |
27 | { | |
28 | request_region(SBX00_ACPI_IO_BASE, SBX00_ACPI_IO_SIZE, "acpi"); | |
29 | return 0; | |
30 | } | |
31 | ||
32 | static void pmio_write_index(u16 index, u8 reg, u8 value) | |
33 | { | |
34 | outb(reg, index); | |
35 | outb(value, index + 1); | |
36 | } | |
37 | ||
38 | static u8 pmio_read_index(u16 index, u8 reg) | |
39 | { | |
40 | outb(reg, index); | |
41 | return inb(index + 1); | |
42 | } | |
43 | ||
44 | void pm_iowrite(u8 reg, u8 value) | |
45 | { | |
46 | pmio_write_index(PM_INDEX, reg, value); | |
47 | } | |
48 | EXPORT_SYMBOL(pm_iowrite); | |
49 | ||
50 | u8 pm_ioread(u8 reg) | |
51 | { | |
52 | return pmio_read_index(PM_INDEX, reg); | |
53 | } | |
54 | EXPORT_SYMBOL(pm_ioread); | |
55 | ||
56 | void pm2_iowrite(u8 reg, u8 value) | |
57 | { | |
58 | pmio_write_index(PM2_INDEX, reg, value); | |
59 | } | |
60 | EXPORT_SYMBOL(pm2_iowrite); | |
61 | ||
62 | u8 pm2_ioread(u8 reg) | |
63 | { | |
64 | return pmio_read_index(PM2_INDEX, reg); | |
65 | } | |
66 | EXPORT_SYMBOL(pm2_ioread); | |
67 | ||
68 | static void acpi_hw_clear_status(void) | |
69 | { | |
70 | u16 value; | |
71 | ||
72 | /* PMStatus: Clear WakeStatus/PwrBtnStatus */ | |
73 | value = inw(ACPI_PM_EVT_BLK); | |
74 | value |= (1 << 8 | 1 << 15); | |
75 | outw(value, ACPI_PM_EVT_BLK); | |
76 | ||
77 | /* GPEStatus: Clear all generated events */ | |
78 | outl(inl(ACPI_GPE0_BLK), ACPI_GPE0_BLK); | |
79 | } | |
80 | ||
81 | void acpi_registers_setup(void) | |
82 | { | |
83 | u32 value; | |
84 | ||
85 | /* PM Status Base */ | |
86 | pm_iowrite(0x20, ACPI_PM_EVT_BLK & 0xff); | |
87 | pm_iowrite(0x21, ACPI_PM_EVT_BLK >> 8); | |
88 | ||
89 | /* PM Control Base */ | |
90 | pm_iowrite(0x22, ACPI_PM_CNT_BLK & 0xff); | |
91 | pm_iowrite(0x23, ACPI_PM_CNT_BLK >> 8); | |
92 | ||
93 | /* GPM Base */ | |
94 | pm_iowrite(0x28, ACPI_GPE0_BLK & 0xff); | |
95 | pm_iowrite(0x29, ACPI_GPE0_BLK >> 8); | |
96 | ||
97 | /* ACPI End */ | |
98 | pm_iowrite(0x2e, ACPI_END & 0xff); | |
99 | pm_iowrite(0x2f, ACPI_END >> 8); | |
100 | ||
101 | /* IO Decode: When AcpiDecodeEnable set, South-Bridge uses the contents | |
102 | * of the PM registers at index 0x20~0x2B to decode ACPI I/O address. */ | |
103 | pm_iowrite(0x0e, 1 << 3); | |
104 | ||
105 | /* SCI_EN set */ | |
106 | outw(1, ACPI_PM_CNT_BLK); | |
107 | ||
108 | /* Enable to generate SCI */ | |
109 | pm_iowrite(0x10, pm_ioread(0x10) | 1); | |
110 | ||
111 | /* GPM3/GPM9 enable */ | |
112 | value = inl(ACPI_GPE0_BLK + 4); | |
113 | outl(value | (1 << 14) | (1 << 22), ACPI_GPE0_BLK + 4); | |
114 | ||
115 | /* Set GPM9 as input */ | |
116 | pm_iowrite(0x8d, pm_ioread(0x8d) & (~(1 << 1))); | |
117 | ||
118 | /* Set GPM9 as non-output */ | |
119 | pm_iowrite(0x94, pm_ioread(0x94) | (1 << 3)); | |
120 | ||
121 | /* GPM3 config ACPI trigger SCIOUT */ | |
122 | pm_iowrite(0x33, pm_ioread(0x33) & (~(3 << 4))); | |
123 | ||
124 | /* GPM9 config ACPI trigger SCIOUT */ | |
125 | pm_iowrite(0x3d, pm_ioread(0x3d) & (~(3 << 2))); | |
126 | ||
127 | /* GPM3 config falling edge trigger */ | |
128 | pm_iowrite(0x37, pm_ioread(0x37) & (~(1 << 6))); | |
129 | ||
130 | /* No wait for STPGNT# in ACPI Sx state */ | |
131 | pm_iowrite(0x7c, pm_ioread(0x7c) | (1 << 6)); | |
132 | ||
133 | /* Set GPM3 pull-down enable */ | |
134 | value = pm2_ioread(0xf6); | |
135 | value |= ((1 << 7) | (1 << 3)); | |
136 | pm2_iowrite(0xf6, value); | |
137 | ||
138 | /* Set GPM9 pull-down enable */ | |
139 | value = pm2_ioread(0xf8); | |
140 | value |= ((1 << 5) | (1 << 1)); | |
141 | pm2_iowrite(0xf8, value); | |
142 | } | |
143 | ||
144 | int __init sbx00_acpi_init(void) | |
145 | { | |
146 | register_acpi_resource(); | |
147 | acpi_registers_setup(); | |
148 | acpi_hw_clear_status(); | |
149 | ||
150 | return 0; | |
151 | } |