Commit | Line | Data |
---|---|---|
f62e5184 AS |
1 | /* |
2 | * AMD Geode southbridge support code | |
3 | * Copyright (C) 2006, Advanced Micro Devices, Inc. | |
ade76149 | 4 | * Copyright (C) 2007, Andres Salomon <dilinger@debian.org> |
f62e5184 AS |
5 | * |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of version 2 of the GNU General Public License | |
8 | * as published by the Free Software Foundation. | |
9 | */ | |
10 | ||
11 | #include <linux/kernel.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/ioport.h> | |
14 | #include <linux/io.h> | |
15 | #include <asm/msr.h> | |
16 | #include <asm/geode.h> | |
17 | ||
18 | static struct { | |
19 | char *name; | |
20 | u32 msr; | |
21 | int size; | |
22 | u32 base; | |
23 | } lbars[] = { | |
24 | { "geode-pms", MSR_LBAR_PMS, LBAR_PMS_SIZE, 0 }, | |
25 | { "geode-acpi", MSR_LBAR_ACPI, LBAR_ACPI_SIZE, 0 }, | |
26 | { "geode-gpio", MSR_LBAR_GPIO, LBAR_GPIO_SIZE, 0 }, | |
27 | { "geode-mfgpt", MSR_LBAR_MFGPT, LBAR_MFGPT_SIZE, 0 } | |
28 | }; | |
29 | ||
30 | static void __init init_lbars(void) | |
31 | { | |
32 | u32 lo, hi; | |
33 | int i; | |
34 | ||
35 | for (i = 0; i < ARRAY_SIZE(lbars); i++) { | |
36 | rdmsr(lbars[i].msr, lo, hi); | |
37 | if (hi & 0x01) | |
38 | lbars[i].base = lo & 0x0000ffff; | |
39 | ||
40 | if (lbars[i].base == 0) | |
41 | printk(KERN_ERR "geode: Couldn't initialize '%s'\n", | |
42 | lbars[i].name); | |
43 | } | |
44 | } | |
45 | ||
46 | int geode_get_dev_base(unsigned int dev) | |
47 | { | |
48 | BUG_ON(dev >= ARRAY_SIZE(lbars)); | |
49 | return lbars[dev].base; | |
50 | } | |
51 | EXPORT_SYMBOL_GPL(geode_get_dev_base); | |
52 | ||
53 | /* === GPIO API === */ | |
54 | ||
ade76149 | 55 | void geode_gpio_set(u32 gpio, unsigned int reg) |
f62e5184 AS |
56 | { |
57 | u32 base = geode_get_dev_base(GEODE_DEV_GPIO); | |
58 | ||
59 | if (!base) | |
60 | return; | |
61 | ||
ade76149 AS |
62 | /* low bank register */ |
63 | if (gpio & 0xFFFF) | |
64 | outl(gpio & 0xFFFF, base + reg); | |
65 | /* high bank register */ | |
66 | gpio >>= 16; | |
67 | if (gpio) | |
68 | outl(gpio, base + 0x80 + reg); | |
f62e5184 AS |
69 | } |
70 | EXPORT_SYMBOL_GPL(geode_gpio_set); | |
71 | ||
ade76149 | 72 | void geode_gpio_clear(u32 gpio, unsigned int reg) |
f62e5184 AS |
73 | { |
74 | u32 base = geode_get_dev_base(GEODE_DEV_GPIO); | |
75 | ||
76 | if (!base) | |
77 | return; | |
78 | ||
ade76149 AS |
79 | /* low bank register */ |
80 | if (gpio & 0xFFFF) | |
81 | outl((gpio & 0xFFFF) << 16, base + reg); | |
82 | /* high bank register */ | |
83 | gpio &= (0xFFFF << 16); | |
84 | if (gpio) | |
85 | outl(gpio, base + 0x80 + reg); | |
f62e5184 AS |
86 | } |
87 | EXPORT_SYMBOL_GPL(geode_gpio_clear); | |
88 | ||
ade76149 | 89 | int geode_gpio_isset(u32 gpio, unsigned int reg) |
f62e5184 AS |
90 | { |
91 | u32 base = geode_get_dev_base(GEODE_DEV_GPIO); | |
ade76149 | 92 | u32 val; |
f62e5184 AS |
93 | |
94 | if (!base) | |
95 | return 0; | |
96 | ||
ade76149 AS |
97 | /* low bank register */ |
98 | if (gpio & 0xFFFF) { | |
99 | val = inl(base + reg) & (gpio & 0xFFFF); | |
100 | if ((gpio & 0xFFFF) == val) | |
101 | return 1; | |
102 | } | |
103 | /* high bank register */ | |
104 | gpio >>= 16; | |
105 | if (gpio) { | |
106 | val = inl(base + 0x80 + reg) & gpio; | |
107 | if (gpio == val) | |
108 | return 1; | |
109 | } | |
110 | return 0; | |
f62e5184 AS |
111 | } |
112 | EXPORT_SYMBOL_GPL(geode_gpio_isset); | |
113 | ||
114 | void geode_gpio_set_irq(unsigned int group, unsigned int irq) | |
115 | { | |
116 | u32 lo, hi; | |
117 | ||
118 | if (group > 7 || irq > 15) | |
119 | return; | |
120 | ||
121 | rdmsr(MSR_PIC_ZSEL_HIGH, lo, hi); | |
122 | ||
123 | lo &= ~(0xF << (group * 4)); | |
124 | lo |= (irq & 0xF) << (group * 4); | |
125 | ||
126 | wrmsr(MSR_PIC_ZSEL_HIGH, lo, hi); | |
127 | } | |
128 | EXPORT_SYMBOL_GPL(geode_gpio_set_irq); | |
129 | ||
130 | void geode_gpio_setup_event(unsigned int gpio, int pair, int pme) | |
131 | { | |
132 | u32 base = geode_get_dev_base(GEODE_DEV_GPIO); | |
133 | u32 offset, shift, val; | |
134 | ||
135 | if (gpio >= 24) | |
136 | offset = GPIO_MAP_W; | |
137 | else if (gpio >= 16) | |
138 | offset = GPIO_MAP_Z; | |
139 | else if (gpio >= 8) | |
140 | offset = GPIO_MAP_Y; | |
141 | else | |
142 | offset = GPIO_MAP_X; | |
143 | ||
144 | shift = (gpio % 8) * 4; | |
145 | ||
146 | val = inl(base + offset); | |
147 | ||
148 | /* Clear whatever was there before */ | |
149 | val &= ~(0xF << shift); | |
150 | ||
151 | /* And set the new value */ | |
152 | ||
153 | val |= ((pair & 7) << shift); | |
154 | ||
155 | /* Set the PME bit if this is a PME event */ | |
156 | ||
157 | if (pme) | |
158 | val |= (1 << (shift + 3)); | |
159 | ||
160 | outl(val, base + offset); | |
161 | } | |
162 | EXPORT_SYMBOL_GPL(geode_gpio_setup_event); | |
163 | ||
547acec7 AS |
164 | int geode_has_vsa2(void) |
165 | { | |
166 | static int has_vsa2 = -1; | |
167 | ||
168 | if (has_vsa2 == -1) { | |
ffe6e1da JC |
169 | u16 val; |
170 | ||
547acec7 AS |
171 | /* |
172 | * The VSA has virtual registers that we can query for a | |
173 | * signature. | |
174 | */ | |
175 | outw(VSA_VR_UNLOCK, VSA_VRC_INDEX); | |
176 | outw(VSA_VR_SIGNATURE, VSA_VRC_INDEX); | |
177 | ||
ffe6e1da JC |
178 | val = inw(VSA_VRC_DATA); |
179 | has_vsa2 = (val == AMD_VSA_SIG || val == GSW_VSA_SIG); | |
547acec7 AS |
180 | } |
181 | ||
182 | return has_vsa2; | |
183 | } | |
184 | EXPORT_SYMBOL_GPL(geode_has_vsa2); | |
185 | ||
f62e5184 AS |
186 | static int __init geode_southbridge_init(void) |
187 | { | |
188 | if (!is_geode()) | |
189 | return -ENODEV; | |
190 | ||
191 | init_lbars(); | |
f087515c | 192 | (void) mfgpt_timer_setup(); |
f62e5184 AS |
193 | return 0; |
194 | } | |
195 | ||
196 | postcore_initcall(geode_southbridge_init); |