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-rw-r--r--arch/i386/kernel/Makefile1
-rw-r--r--arch/i386/kernel/geode.c155
-rw-r--r--include/asm-i386/geode.h159
3 files changed, 315 insertions, 0 deletions
diff --git a/arch/i386/kernel/Makefile b/arch/i386/kernel/Makefile
index 06da59f6f837..dbe5e87e0d66 100644
--- a/arch/i386/kernel/Makefile
+++ b/arch/i386/kernel/Makefile
@@ -40,6 +40,7 @@ obj-$(CONFIG_VM86) += vm86.o
40obj-$(CONFIG_EARLY_PRINTK) += early_printk.o 40obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
41obj-$(CONFIG_HPET_TIMER) += hpet.o 41obj-$(CONFIG_HPET_TIMER) += hpet.o
42obj-$(CONFIG_K8_NB) += k8.o 42obj-$(CONFIG_K8_NB) += k8.o
43obj-$(CONFIG_MGEODE_LX) += geode.o
43 44
44obj-$(CONFIG_VMI) += vmi.o vmiclock.o 45obj-$(CONFIG_VMI) += vmi.o vmiclock.o
45obj-$(CONFIG_PARAVIRT) += paravirt.o 46obj-$(CONFIG_PARAVIRT) += paravirt.o
diff --git a/arch/i386/kernel/geode.c b/arch/i386/kernel/geode.c
new file mode 100644
index 000000000000..41e8aec4c61d
--- /dev/null
+++ b/arch/i386/kernel/geode.c
@@ -0,0 +1,155 @@
1/*
2 * AMD Geode southbridge support code
3 * Copyright (C) 2006, Advanced Micro Devices, Inc.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of version 2 of the GNU General Public License
7 * as published by the Free Software Foundation.
8 */
9
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/ioport.h>
13#include <linux/io.h>
14#include <asm/msr.h>
15#include <asm/geode.h>
16
17static struct {
18 char *name;
19 u32 msr;
20 int size;
21 u32 base;
22} lbars[] = {
23 { "geode-pms", MSR_LBAR_PMS, LBAR_PMS_SIZE, 0 },
24 { "geode-acpi", MSR_LBAR_ACPI, LBAR_ACPI_SIZE, 0 },
25 { "geode-gpio", MSR_LBAR_GPIO, LBAR_GPIO_SIZE, 0 },
26 { "geode-mfgpt", MSR_LBAR_MFGPT, LBAR_MFGPT_SIZE, 0 }
27};
28
29static void __init init_lbars(void)
30{
31 u32 lo, hi;
32 int i;
33
34 for (i = 0; i < ARRAY_SIZE(lbars); i++) {
35 rdmsr(lbars[i].msr, lo, hi);
36 if (hi & 0x01)
37 lbars[i].base = lo & 0x0000ffff;
38
39 if (lbars[i].base == 0)
40 printk(KERN_ERR "geode: Couldn't initialize '%s'\n",
41 lbars[i].name);
42 }
43}
44
45int geode_get_dev_base(unsigned int dev)
46{
47 BUG_ON(dev >= ARRAY_SIZE(lbars));
48 return lbars[dev].base;
49}
50EXPORT_SYMBOL_GPL(geode_get_dev_base);
51
52/* === GPIO API === */
53
54void geode_gpio_set(unsigned int gpio, unsigned int reg)
55{
56 u32 base = geode_get_dev_base(GEODE_DEV_GPIO);
57
58 if (!base)
59 return;
60
61 if (gpio < 16)
62 outl(1 << gpio, base + reg);
63 else
64 outl(1 << (gpio - 16), base + 0x80 + reg);
65}
66EXPORT_SYMBOL_GPL(geode_gpio_set);
67
68void geode_gpio_clear(unsigned int gpio, unsigned int reg)
69{
70 u32 base = geode_get_dev_base(GEODE_DEV_GPIO);
71
72 if (!base)
73 return;
74
75 if (gpio < 16)
76 outl(1 << (gpio + 16), base + reg);
77 else
78 outl(1 << gpio, base + 0x80 + reg);
79}
80EXPORT_SYMBOL_GPL(geode_gpio_clear);
81
82int geode_gpio_isset(unsigned int gpio, unsigned int reg)
83{
84 u32 base = geode_get_dev_base(GEODE_DEV_GPIO);
85
86 if (!base)
87 return 0;
88
89 if (gpio < 16)
90 return (inl(base + reg) & (1 << gpio)) ? 1 : 0;
91 else
92 return (inl(base + 0x80 + reg) & (1 << (gpio - 16))) ? 1 : 0;
93}
94EXPORT_SYMBOL_GPL(geode_gpio_isset);
95
96void geode_gpio_set_irq(unsigned int group, unsigned int irq)
97{
98 u32 lo, hi;
99
100 if (group > 7 || irq > 15)
101 return;
102
103 rdmsr(MSR_PIC_ZSEL_HIGH, lo, hi);
104
105 lo &= ~(0xF << (group * 4));
106 lo |= (irq & 0xF) << (group * 4);
107
108 wrmsr(MSR_PIC_ZSEL_HIGH, lo, hi);
109}
110EXPORT_SYMBOL_GPL(geode_gpio_set_irq);
111
112void geode_gpio_setup_event(unsigned int gpio, int pair, int pme)
113{
114 u32 base = geode_get_dev_base(GEODE_DEV_GPIO);
115 u32 offset, shift, val;
116
117 if (gpio >= 24)
118 offset = GPIO_MAP_W;
119 else if (gpio >= 16)
120 offset = GPIO_MAP_Z;
121 else if (gpio >= 8)
122 offset = GPIO_MAP_Y;
123 else
124 offset = GPIO_MAP_X;
125
126 shift = (gpio % 8) * 4;
127
128 val = inl(base + offset);
129
130 /* Clear whatever was there before */
131 val &= ~(0xF << shift);
132
133 /* And set the new value */
134
135 val |= ((pair & 7) << shift);
136
137 /* Set the PME bit if this is a PME event */
138
139 if (pme)
140 val |= (1 << (shift + 3));
141
142 outl(val, base + offset);
143}
144EXPORT_SYMBOL_GPL(geode_gpio_setup_event);
145
146static int __init geode_southbridge_init(void)
147{
148 if (!is_geode())
149 return -ENODEV;
150
151 init_lbars();
152 return 0;
153}
154
155postcore_initcall(geode_southbridge_init);
diff --git a/include/asm-i386/geode.h b/include/asm-i386/geode.h
new file mode 100644
index 000000000000..6da4bbbea3dc
--- /dev/null
+++ b/include/asm-i386/geode.h
@@ -0,0 +1,159 @@
1/*
2 * AMD Geode definitions
3 * Copyright (C) 2006, Advanced Micro Devices, Inc.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of version 2 of the GNU General Public License
7 * as published by the Free Software Foundation.
8 */
9
10#ifndef _ASM_GEODE_H_
11#define _ASM_GEODE_H_
12
13#include <asm/processor.h>
14#include <linux/io.h>
15
16/* Generic southbridge functions */
17
18#define GEODE_DEV_PMS 0
19#define GEODE_DEV_ACPI 1
20#define GEODE_DEV_GPIO 2
21#define GEODE_DEV_MFGPT 3
22
23extern int geode_get_dev_base(unsigned int dev);
24
25/* Useful macros */
26#define geode_pms_base() geode_get_dev_base(GEODE_DEV_PMS)
27#define geode_acpi_base() geode_get_dev_base(GEODE_DEV_ACPI)
28#define geode_gpio_base() geode_get_dev_base(GEODE_DEV_GPIO)
29#define geode_mfgpt_base() geode_get_dev_base(GEODE_DEV_MFGPT)
30
31/* MSRS */
32
33#define GX_GLCP_SYS_RSTPLL 0x4C000014
34
35#define MSR_LBAR_SMB 0x5140000B
36#define MSR_LBAR_GPIO 0x5140000C
37#define MSR_LBAR_MFGPT 0x5140000D
38#define MSR_LBAR_ACPI 0x5140000E
39#define MSR_LBAR_PMS 0x5140000F
40
41#define MSR_PIC_YSEL_LOW 0x51400020
42#define MSR_PIC_YSEL_HIGH 0x51400021
43#define MSR_PIC_ZSEL_LOW 0x51400022
44#define MSR_PIC_ZSEL_HIGH 0x51400023
45
46#define MFGPT_IRQ_MSR 0x51400028
47#define MFGPT_NR_MSR 0x51400029
48
49/* Resource Sizes */
50
51#define LBAR_GPIO_SIZE 0xFF
52#define LBAR_MFGPT_SIZE 0x40
53#define LBAR_ACPI_SIZE 0x40
54#define LBAR_PMS_SIZE 0x80
55
56/* ACPI registers (PMS block) */
57
58/*
59 * PM1_EN is only valid when VSA is enabled for 16 bit reads.
60 * When VSA is not enabled, *always* read both PM1_STS and PM1_EN
61 * with a 32 bit read at offset 0x0
62 */
63
64#define PM1_STS 0x00
65#define PM1_EN 0x02
66#define PM1_CNT 0x08
67#define PM2_CNT 0x0C
68#define PM_TMR 0x10
69#define PM_GPE0_STS 0x18
70#define PM_GPE0_EN 0x1C
71
72/* PMC registers (PMS block) */
73
74#define PM_SSD 0x00
75#define PM_SCXA 0x04
76#define PM_SCYA 0x08
77#define PM_OUT_SLPCTL 0x0C
78#define PM_SCLK 0x10
79#define PM_SED 0x1
80#define PM_SCXD 0x18
81#define PM_SCYD 0x1C
82#define PM_IN_SLPCTL 0x20
83#define PM_WKD 0x30
84#define PM_WKXD 0x34
85#define PM_RD 0x38
86#define PM_WKXA 0x3C
87#define PM_FSD 0x40
88#define PM_TSD 0x44
89#define PM_PSD 0x48
90#define PM_NWKD 0x4C
91#define PM_AWKD 0x50
92#define PM_SSC 0x54
93
94/* GPIO */
95
96#define GPIO_OUTPUT_VAL 0x00
97#define GPIO_OUTPUT_ENABLE 0x04
98#define GPIO_OUTPUT_OPEN_DRAIN 0x08
99#define GPIO_OUTPUT_INVERT 0x0C
100#define GPIO_OUTPUT_AUX1 0x10
101#define GPIO_OUTPUT_AUX2 0x14
102#define GPIO_PULL_UP 0x18
103#define GPIO_PULL_DOWN 0x1C
104#define GPIO_INPUT_ENABLE 0x20
105#define GPIO_INPUT_INVERT 0x24
106#define GPIO_INPUT_FILTER 0x28
107#define GPIO_INPUT_EVENT_COUNT 0x2C
108#define GPIO_READ_BACK 0x30
109#define GPIO_INPUT_AUX1 0x34
110#define GPIO_EVENTS_ENABLE 0x38
111#define GPIO_LOCK_ENABLE 0x3C
112#define GPIO_POSITIVE_EDGE_EN 0x40
113#define GPIO_NEGATIVE_EDGE_EN 0x44
114#define GPIO_POSITIVE_EDGE_STS 0x48
115#define GPIO_NEGATIVE_EDGE_STS 0x4C
116
117#define GPIO_MAP_X 0xE0
118#define GPIO_MAP_Y 0xE4
119#define GPIO_MAP_Z 0xE8
120#define GPIO_MAP_W 0xEC
121
122extern void geode_gpio_set(unsigned int, unsigned int);
123extern void geode_gpio_clear(unsigned int, unsigned int);
124extern int geode_gpio_isset(unsigned int, unsigned int);
125extern void geode_gpio_setup_event(unsigned int, int, int);
126extern void geode_gpio_set_irq(unsigned int, unsigned int);
127
128static inline void geode_gpio_event_irq(unsigned int gpio, int pair)
129{
130 geode_gpio_setup_event(gpio, pair, 0);
131}
132
133static inline void geode_gpio_event_pme(unsigned int gpio, int pair)
134{
135 geode_gpio_setup_event(gpio, pair, 1);
136}
137
138/* Specific geode tests */
139
140static inline int is_geode_gx(void)
141{
142 return ((boot_cpu_data.x86_vendor == X86_VENDOR_NSC) &&
143 (boot_cpu_data.x86 == 5) &&
144 (boot_cpu_data.x86_model == 5));
145}
146
147static inline int is_geode_lx(void)
148{
149 return ((boot_cpu_data.x86_vendor == X86_VENDOR_AMD) &&
150 (boot_cpu_data.x86 == 5) &&
151 (boot_cpu_data.x86_model == 10));
152}
153
154static inline int is_geode(void)
155{
156 return (is_geode_gx() || is_geode_lx());
157}
158
159#endif