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git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - arch/x86/kernel/geode_32.c
2 * AMD Geode southbridge support code
3 * Copyright (C) 2006, Advanced Micro Devices, Inc.
4 * Copyright (C) 2007, Andres Salomon <dilinger@debian.org>
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.
11 #include <linux/kernel.h>
12 #include <linux/module.h>
13 #include <linux/ioport.h>
16 #include <asm/geode.h>
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 }
30 static void __init
init_lbars(void)
35 for (i
= 0; i
< ARRAY_SIZE(lbars
); i
++) {
36 rdmsr(lbars
[i
].msr
, lo
, hi
);
38 lbars
[i
].base
= lo
& 0x0000ffff;
40 if (lbars
[i
].base
== 0)
41 printk(KERN_ERR
"geode: Couldn't initialize '%s'\n",
46 int geode_get_dev_base(unsigned int dev
)
48 BUG_ON(dev
>= ARRAY_SIZE(lbars
));
49 return lbars
[dev
].base
;
51 EXPORT_SYMBOL_GPL(geode_get_dev_base
);
53 /* === GPIO API === */
55 void geode_gpio_set(u32 gpio
, unsigned int reg
)
57 u32 base
= geode_get_dev_base(GEODE_DEV_GPIO
);
62 /* low bank register */
64 outl(gpio
& 0xFFFF, base
+ reg
);
65 /* high bank register */
68 outl(gpio
, base
+ 0x80 + reg
);
70 EXPORT_SYMBOL_GPL(geode_gpio_set
);
72 void geode_gpio_clear(u32 gpio
, unsigned int reg
)
74 u32 base
= geode_get_dev_base(GEODE_DEV_GPIO
);
79 /* low bank register */
81 outl((gpio
& 0xFFFF) << 16, base
+ reg
);
82 /* high bank register */
83 gpio
&= (0xFFFF << 16);
85 outl(gpio
, base
+ 0x80 + reg
);
87 EXPORT_SYMBOL_GPL(geode_gpio_clear
);
89 int geode_gpio_isset(u32 gpio
, unsigned int reg
)
91 u32 base
= geode_get_dev_base(GEODE_DEV_GPIO
);
97 /* low bank register */
99 val
= inl(base
+ reg
) & (gpio
& 0xFFFF);
100 if ((gpio
& 0xFFFF) == val
)
103 /* high bank register */
106 val
= inl(base
+ 0x80 + reg
) & gpio
;
112 EXPORT_SYMBOL_GPL(geode_gpio_isset
);
114 void geode_gpio_set_irq(unsigned int group
, unsigned int irq
)
118 if (group
> 7 || irq
> 15)
121 rdmsr(MSR_PIC_ZSEL_HIGH
, lo
, hi
);
123 lo
&= ~(0xF << (group
* 4));
124 lo
|= (irq
& 0xF) << (group
* 4);
126 wrmsr(MSR_PIC_ZSEL_HIGH
, lo
, hi
);
128 EXPORT_SYMBOL_GPL(geode_gpio_set_irq
);
130 void geode_gpio_setup_event(unsigned int gpio
, int pair
, int pme
)
132 u32 base
= geode_get_dev_base(GEODE_DEV_GPIO
);
133 u32 offset
, shift
, val
;
144 shift
= (gpio
% 8) * 4;
146 val
= inl(base
+ offset
);
148 /* Clear whatever was there before */
149 val
&= ~(0xF << shift
);
151 /* And set the new value */
153 val
|= ((pair
& 7) << shift
);
155 /* Set the PME bit if this is a PME event */
158 val
|= (1 << (shift
+ 3));
160 outl(val
, base
+ offset
);
162 EXPORT_SYMBOL_GPL(geode_gpio_setup_event
);
164 int geode_has_vsa2(void)
166 static int has_vsa2
= -1;
168 if (has_vsa2
== -1) {
172 * The VSA has virtual registers that we can query for a
175 outw(VSA_VR_UNLOCK
, VSA_VRC_INDEX
);
176 outw(VSA_VR_SIGNATURE
, VSA_VRC_INDEX
);
178 val
= inw(VSA_VRC_DATA
);
179 has_vsa2
= (val
== AMD_VSA_SIG
|| val
== GSW_VSA_SIG
);
184 EXPORT_SYMBOL_GPL(geode_has_vsa2
);
186 static int __init
geode_southbridge_init(void)
192 (void) mfgpt_timer_setup();
196 postcore_initcall(geode_southbridge_init
);