Commit f62e5184 authored by Andres Salomon's avatar Andres Salomon Committed by Linus Torvalds
Browse files

i386: basic infrastructure support for AMD geode-class machines



This builds upon the existing geode infrastructure, but adds southbridge
support, some GPIO functions, and a header file (asm-i386/geode.h) with some
useful GX/LX detection tests.

The majority of this code was written by Jordan Crouse.
Signed-off-by: default avatarJordan Crouse <jordan.crouse@amd.com>
Signed-off-by: default avatarAndres Salomon <dilinger@debian.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarAndi Kleen <ak@suse.de>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 5a3ece79
......@@ -40,6 +40,7 @@ obj-$(CONFIG_VM86) += vm86.o
obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
obj-$(CONFIG_HPET_TIMER) += hpet.o
obj-$(CONFIG_K8_NB) += k8.o
obj-$(CONFIG_MGEODE_LX) += geode.o
obj-$(CONFIG_VMI) += vmi.o vmiclock.o
obj-$(CONFIG_PARAVIRT) += paravirt.o
......
/*
* AMD Geode southbridge support code
* Copyright (C) 2006, Advanced Micro Devices, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public License
* as published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/ioport.h>
#include <linux/io.h>
#include <asm/msr.h>
#include <asm/geode.h>
static struct {
char *name;
u32 msr;
int size;
u32 base;
} lbars[] = {
{ "geode-pms", MSR_LBAR_PMS, LBAR_PMS_SIZE, 0 },
{ "geode-acpi", MSR_LBAR_ACPI, LBAR_ACPI_SIZE, 0 },
{ "geode-gpio", MSR_LBAR_GPIO, LBAR_GPIO_SIZE, 0 },
{ "geode-mfgpt", MSR_LBAR_MFGPT, LBAR_MFGPT_SIZE, 0 }
};
static void __init init_lbars(void)
{
u32 lo, hi;
int i;
for (i = 0; i < ARRAY_SIZE(lbars); i++) {
rdmsr(lbars[i].msr, lo, hi);
if (hi & 0x01)
lbars[i].base = lo & 0x0000ffff;
if (lbars[i].base == 0)
printk(KERN_ERR "geode: Couldn't initialize '%s'\n",
lbars[i].name);
}
}
int geode_get_dev_base(unsigned int dev)
{
BUG_ON(dev >= ARRAY_SIZE(lbars));
return lbars[dev].base;
}
EXPORT_SYMBOL_GPL(geode_get_dev_base);
/* === GPIO API === */
void geode_gpio_set(unsigned int gpio, unsigned int reg)
{
u32 base = geode_get_dev_base(GEODE_DEV_GPIO);
if (!base)
return;
if (gpio < 16)
outl(1 << gpio, base + reg);
else
outl(1 << (gpio - 16), base + 0x80 + reg);
}
EXPORT_SYMBOL_GPL(geode_gpio_set);
void geode_gpio_clear(unsigned int gpio, unsigned int reg)
{
u32 base = geode_get_dev_base(GEODE_DEV_GPIO);
if (!base)
return;
if (gpio < 16)
outl(1 << (gpio + 16), base + reg);
else
outl(1 << gpio, base + 0x80 + reg);
}
EXPORT_SYMBOL_GPL(geode_gpio_clear);
int geode_gpio_isset(unsigned int gpio, unsigned int reg)
{
u32 base = geode_get_dev_base(GEODE_DEV_GPIO);
if (!base)
return 0;
if (gpio < 16)
return (inl(base + reg) & (1 << gpio)) ? 1 : 0;
else
return (inl(base + 0x80 + reg) & (1 << (gpio - 16))) ? 1 : 0;
}
EXPORT_SYMBOL_GPL(geode_gpio_isset);
void geode_gpio_set_irq(unsigned int group, unsigned int irq)
{
u32 lo, hi;
if (group > 7 || irq > 15)
return;
rdmsr(MSR_PIC_ZSEL_HIGH, lo, hi);
lo &= ~(0xF << (group * 4));
lo |= (irq & 0xF) << (group * 4);
wrmsr(MSR_PIC_ZSEL_HIGH, lo, hi);
}
EXPORT_SYMBOL_GPL(geode_gpio_set_irq);
void geode_gpio_setup_event(unsigned int gpio, int pair, int pme)
{
u32 base = geode_get_dev_base(GEODE_DEV_GPIO);
u32 offset, shift, val;
if (gpio >= 24)
offset = GPIO_MAP_W;
else if (gpio >= 16)
offset = GPIO_MAP_Z;
else if (gpio >= 8)
offset = GPIO_MAP_Y;
else
offset = GPIO_MAP_X;
shift = (gpio % 8) * 4;
val = inl(base + offset);
/* Clear whatever was there before */
val &= ~(0xF << shift);
/* And set the new value */
val |= ((pair & 7) << shift);
/* Set the PME bit if this is a PME event */
if (pme)
val |= (1 << (shift + 3));
outl(val, base + offset);
}
EXPORT_SYMBOL_GPL(geode_gpio_setup_event);
static int __init geode_southbridge_init(void)
{
if (!is_geode())
return -ENODEV;
init_lbars();
return 0;
}
postcore_initcall(geode_southbridge_init);
/*
* AMD Geode definitions
* Copyright (C) 2006, Advanced Micro Devices, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public License
* as published by the Free Software Foundation.
*/
#ifndef _ASM_GEODE_H_
#define _ASM_GEODE_H_
#include <asm/processor.h>
#include <linux/io.h>
/* Generic southbridge functions */
#define GEODE_DEV_PMS 0
#define GEODE_DEV_ACPI 1
#define GEODE_DEV_GPIO 2
#define GEODE_DEV_MFGPT 3
extern int geode_get_dev_base(unsigned int dev);
/* Useful macros */
#define geode_pms_base() geode_get_dev_base(GEODE_DEV_PMS)
#define geode_acpi_base() geode_get_dev_base(GEODE_DEV_ACPI)
#define geode_gpio_base() geode_get_dev_base(GEODE_DEV_GPIO)
#define geode_mfgpt_base() geode_get_dev_base(GEODE_DEV_MFGPT)
/* MSRS */
#define GX_GLCP_SYS_RSTPLL 0x4C000014
#define MSR_LBAR_SMB 0x5140000B
#define MSR_LBAR_GPIO 0x5140000C
#define MSR_LBAR_MFGPT 0x5140000D
#define MSR_LBAR_ACPI 0x5140000E
#define MSR_LBAR_PMS 0x5140000F
#define MSR_PIC_YSEL_LOW 0x51400020
#define MSR_PIC_YSEL_HIGH 0x51400021
#define MSR_PIC_ZSEL_LOW 0x51400022
#define MSR_PIC_ZSEL_HIGH 0x51400023
#define MFGPT_IRQ_MSR 0x51400028
#define MFGPT_NR_MSR 0x51400029
/* Resource Sizes */
#define LBAR_GPIO_SIZE 0xFF
#define LBAR_MFGPT_SIZE 0x40
#define LBAR_ACPI_SIZE 0x40
#define LBAR_PMS_SIZE 0x80
/* ACPI registers (PMS block) */
/*
* PM1_EN is only valid when VSA is enabled for 16 bit reads.
* When VSA is not enabled, *always* read both PM1_STS and PM1_EN
* with a 32 bit read at offset 0x0
*/
#define PM1_STS 0x00
#define PM1_EN 0x02
#define PM1_CNT 0x08
#define PM2_CNT 0x0C
#define PM_TMR 0x10
#define PM_GPE0_STS 0x18
#define PM_GPE0_EN 0x1C
/* PMC registers (PMS block) */
#define PM_SSD 0x00
#define PM_SCXA 0x04
#define PM_SCYA 0x08
#define PM_OUT_SLPCTL 0x0C
#define PM_SCLK 0x10
#define PM_SED 0x1
#define PM_SCXD 0x18
#define PM_SCYD 0x1C
#define PM_IN_SLPCTL 0x20
#define PM_WKD 0x30
#define PM_WKXD 0x34
#define PM_RD 0x38
#define PM_WKXA 0x3C
#define PM_FSD 0x40
#define PM_TSD 0x44
#define PM_PSD 0x48
#define PM_NWKD 0x4C
#define PM_AWKD 0x50
#define PM_SSC 0x54
/* GPIO */
#define GPIO_OUTPUT_VAL 0x00
#define GPIO_OUTPUT_ENABLE 0x04
#define GPIO_OUTPUT_OPEN_DRAIN 0x08
#define GPIO_OUTPUT_INVERT 0x0C
#define GPIO_OUTPUT_AUX1 0x10
#define GPIO_OUTPUT_AUX2 0x14
#define GPIO_PULL_UP 0x18
#define GPIO_PULL_DOWN 0x1C
#define GPIO_INPUT_ENABLE 0x20
#define GPIO_INPUT_INVERT 0x24
#define GPIO_INPUT_FILTER 0x28
#define GPIO_INPUT_EVENT_COUNT 0x2C
#define GPIO_READ_BACK 0x30
#define GPIO_INPUT_AUX1 0x34
#define GPIO_EVENTS_ENABLE 0x38
#define GPIO_LOCK_ENABLE 0x3C
#define GPIO_POSITIVE_EDGE_EN 0x40
#define GPIO_NEGATIVE_EDGE_EN 0x44
#define GPIO_POSITIVE_EDGE_STS 0x48
#define GPIO_NEGATIVE_EDGE_STS 0x4C
#define GPIO_MAP_X 0xE0
#define GPIO_MAP_Y 0xE4
#define GPIO_MAP_Z 0xE8
#define GPIO_MAP_W 0xEC
extern void geode_gpio_set(unsigned int, unsigned int);
extern void geode_gpio_clear(unsigned int, unsigned int);
extern int geode_gpio_isset(unsigned int, unsigned int);
extern void geode_gpio_setup_event(unsigned int, int, int);
extern void geode_gpio_set_irq(unsigned int, unsigned int);
static inline void geode_gpio_event_irq(unsigned int gpio, int pair)
{
geode_gpio_setup_event(gpio, pair, 0);
}
static inline void geode_gpio_event_pme(unsigned int gpio, int pair)
{
geode_gpio_setup_event(gpio, pair, 1);
}
/* Specific geode tests */
static inline int is_geode_gx(void)
{
return ((boot_cpu_data.x86_vendor == X86_VENDOR_NSC) &&
(boot_cpu_data.x86 == 5) &&
(boot_cpu_data.x86_model == 5));
}
static inline int is_geode_lx(void)
{
return ((boot_cpu_data.x86_vendor == X86_VENDOR_AMD) &&
(boot_cpu_data.x86 == 5) &&
(boot_cpu_data.x86_model == 10));
}
static inline int is_geode(void)
{
return (is_geode_gx() || is_geode_lx());
}
#endif
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