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
register_acpi_resource(void)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
pmio_write_index(u16 index,u8 reg,u8 value)31 static void pmio_write_index(u16 index, u8 reg, u8 value)
32 {
33 outb(reg, index);
34 outb(value, index + 1);
35 }
36
pmio_read_index(u16 index,u8 reg)37 static u8 pmio_read_index(u16 index, u8 reg)
38 {
39 outb(reg, index);
40 return inb(index + 1);
41 }
42
pm_iowrite(u8 reg,u8 value)43 void pm_iowrite(u8 reg, u8 value)
44 {
45 pmio_write_index(PM_INDEX, reg, value);
46 }
47 EXPORT_SYMBOL(pm_iowrite);
48
pm_ioread(u8 reg)49 u8 pm_ioread(u8 reg)
50 {
51 return pmio_read_index(PM_INDEX, reg);
52 }
53 EXPORT_SYMBOL(pm_ioread);
54
pm2_iowrite(u8 reg,u8 value)55 void pm2_iowrite(u8 reg, u8 value)
56 {
57 pmio_write_index(PM2_INDEX, reg, value);
58 }
59 EXPORT_SYMBOL(pm2_iowrite);
60
pm2_ioread(u8 reg)61 u8 pm2_ioread(u8 reg)
62 {
63 return pmio_read_index(PM2_INDEX, reg);
64 }
65 EXPORT_SYMBOL(pm2_ioread);
66
acpi_hw_clear_status(void)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
acpi_registers_setup(void)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
sbx00_acpi_init(void)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 }
151