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