mirror of https://gitee.com/openkylin/linux.git
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: Jordan Crouse <jordan.crouse@amd.com> Signed-off-by: Andres Salomon <dilinger@debian.org> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Andres Salomon
Linus Torvalds
parent
5a3ece79b2
commit
f62e518484
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@ -40,6 +40,7 @@ obj-$(CONFIG_VM86) += vm86.o
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obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
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obj-$(CONFIG_HPET_TIMER) += hpet.o
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obj-$(CONFIG_K8_NB) += k8.o
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obj-$(CONFIG_MGEODE_LX) += geode.o
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obj-$(CONFIG_VMI) += vmi.o vmiclock.o
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obj-$(CONFIG_PARAVIRT) += paravirt.o
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@ -0,0 +1,155 @@
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/*
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* AMD Geode southbridge support code
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* Copyright (C) 2006, Advanced Micro Devices, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public License
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* as published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/ioport.h>
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#include <linux/io.h>
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#include <asm/msr.h>
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#include <asm/geode.h>
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static struct {
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char *name;
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u32 msr;
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int size;
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u32 base;
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} lbars[] = {
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{ "geode-pms", MSR_LBAR_PMS, LBAR_PMS_SIZE, 0 },
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{ "geode-acpi", MSR_LBAR_ACPI, LBAR_ACPI_SIZE, 0 },
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{ "geode-gpio", MSR_LBAR_GPIO, LBAR_GPIO_SIZE, 0 },
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{ "geode-mfgpt", MSR_LBAR_MFGPT, LBAR_MFGPT_SIZE, 0 }
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};
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static void __init init_lbars(void)
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{
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u32 lo, hi;
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int i;
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for (i = 0; i < ARRAY_SIZE(lbars); i++) {
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rdmsr(lbars[i].msr, lo, hi);
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if (hi & 0x01)
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lbars[i].base = lo & 0x0000ffff;
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if (lbars[i].base == 0)
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printk(KERN_ERR "geode: Couldn't initialize '%s'\n",
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lbars[i].name);
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}
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}
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int geode_get_dev_base(unsigned int dev)
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{
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BUG_ON(dev >= ARRAY_SIZE(lbars));
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return lbars[dev].base;
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}
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EXPORT_SYMBOL_GPL(geode_get_dev_base);
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/* === GPIO API === */
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void geode_gpio_set(unsigned int gpio, unsigned int reg)
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{
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u32 base = geode_get_dev_base(GEODE_DEV_GPIO);
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if (!base)
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return;
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if (gpio < 16)
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outl(1 << gpio, base + reg);
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else
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outl(1 << (gpio - 16), base + 0x80 + reg);
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}
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EXPORT_SYMBOL_GPL(geode_gpio_set);
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void geode_gpio_clear(unsigned int gpio, unsigned int reg)
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{
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u32 base = geode_get_dev_base(GEODE_DEV_GPIO);
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if (!base)
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return;
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if (gpio < 16)
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outl(1 << (gpio + 16), base + reg);
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else
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outl(1 << gpio, base + 0x80 + reg);
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}
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EXPORT_SYMBOL_GPL(geode_gpio_clear);
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int geode_gpio_isset(unsigned int gpio, unsigned int reg)
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{
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u32 base = geode_get_dev_base(GEODE_DEV_GPIO);
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if (!base)
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return 0;
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if (gpio < 16)
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return (inl(base + reg) & (1 << gpio)) ? 1 : 0;
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else
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return (inl(base + 0x80 + reg) & (1 << (gpio - 16))) ? 1 : 0;
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}
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EXPORT_SYMBOL_GPL(geode_gpio_isset);
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void geode_gpio_set_irq(unsigned int group, unsigned int irq)
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{
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u32 lo, hi;
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if (group > 7 || irq > 15)
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return;
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rdmsr(MSR_PIC_ZSEL_HIGH, lo, hi);
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lo &= ~(0xF << (group * 4));
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lo |= (irq & 0xF) << (group * 4);
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wrmsr(MSR_PIC_ZSEL_HIGH, lo, hi);
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}
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EXPORT_SYMBOL_GPL(geode_gpio_set_irq);
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void geode_gpio_setup_event(unsigned int gpio, int pair, int pme)
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{
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u32 base = geode_get_dev_base(GEODE_DEV_GPIO);
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u32 offset, shift, val;
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if (gpio >= 24)
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offset = GPIO_MAP_W;
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else if (gpio >= 16)
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offset = GPIO_MAP_Z;
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else if (gpio >= 8)
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offset = GPIO_MAP_Y;
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else
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offset = GPIO_MAP_X;
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shift = (gpio % 8) * 4;
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val = inl(base + offset);
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/* Clear whatever was there before */
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val &= ~(0xF << shift);
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/* And set the new value */
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val |= ((pair & 7) << shift);
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/* Set the PME bit if this is a PME event */
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if (pme)
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val |= (1 << (shift + 3));
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outl(val, base + offset);
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}
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EXPORT_SYMBOL_GPL(geode_gpio_setup_event);
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static int __init geode_southbridge_init(void)
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{
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if (!is_geode())
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return -ENODEV;
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init_lbars();
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return 0;
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}
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postcore_initcall(geode_southbridge_init);
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@ -0,0 +1,159 @@
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/*
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* AMD Geode definitions
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* Copyright (C) 2006, Advanced Micro Devices, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public License
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* as published by the Free Software Foundation.
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*/
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#ifndef _ASM_GEODE_H_
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#define _ASM_GEODE_H_
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#include <asm/processor.h>
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#include <linux/io.h>
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/* Generic southbridge functions */
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#define GEODE_DEV_PMS 0
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#define GEODE_DEV_ACPI 1
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#define GEODE_DEV_GPIO 2
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#define GEODE_DEV_MFGPT 3
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extern int geode_get_dev_base(unsigned int dev);
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/* Useful macros */
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#define geode_pms_base() geode_get_dev_base(GEODE_DEV_PMS)
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#define geode_acpi_base() geode_get_dev_base(GEODE_DEV_ACPI)
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#define geode_gpio_base() geode_get_dev_base(GEODE_DEV_GPIO)
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#define geode_mfgpt_base() geode_get_dev_base(GEODE_DEV_MFGPT)
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/* MSRS */
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#define GX_GLCP_SYS_RSTPLL 0x4C000014
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#define MSR_LBAR_SMB 0x5140000B
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#define MSR_LBAR_GPIO 0x5140000C
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#define MSR_LBAR_MFGPT 0x5140000D
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#define MSR_LBAR_ACPI 0x5140000E
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#define MSR_LBAR_PMS 0x5140000F
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#define MSR_PIC_YSEL_LOW 0x51400020
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#define MSR_PIC_YSEL_HIGH 0x51400021
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#define MSR_PIC_ZSEL_LOW 0x51400022
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#define MSR_PIC_ZSEL_HIGH 0x51400023
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#define MFGPT_IRQ_MSR 0x51400028
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#define MFGPT_NR_MSR 0x51400029
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/* Resource Sizes */
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#define LBAR_GPIO_SIZE 0xFF
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#define LBAR_MFGPT_SIZE 0x40
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#define LBAR_ACPI_SIZE 0x40
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#define LBAR_PMS_SIZE 0x80
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/* ACPI registers (PMS block) */
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/*
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* PM1_EN is only valid when VSA is enabled for 16 bit reads.
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* When VSA is not enabled, *always* read both PM1_STS and PM1_EN
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* with a 32 bit read at offset 0x0
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*/
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#define PM1_STS 0x00
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#define PM1_EN 0x02
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#define PM1_CNT 0x08
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#define PM2_CNT 0x0C
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#define PM_TMR 0x10
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#define PM_GPE0_STS 0x18
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#define PM_GPE0_EN 0x1C
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/* PMC registers (PMS block) */
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#define PM_SSD 0x00
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#define PM_SCXA 0x04
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#define PM_SCYA 0x08
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#define PM_OUT_SLPCTL 0x0C
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#define PM_SCLK 0x10
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#define PM_SED 0x1
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#define PM_SCXD 0x18
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#define PM_SCYD 0x1C
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#define PM_IN_SLPCTL 0x20
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#define PM_WKD 0x30
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#define PM_WKXD 0x34
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#define PM_RD 0x38
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#define PM_WKXA 0x3C
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#define PM_FSD 0x40
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#define PM_TSD 0x44
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#define PM_PSD 0x48
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#define PM_NWKD 0x4C
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#define PM_AWKD 0x50
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#define PM_SSC 0x54
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/* GPIO */
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#define GPIO_OUTPUT_VAL 0x00
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#define GPIO_OUTPUT_ENABLE 0x04
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#define GPIO_OUTPUT_OPEN_DRAIN 0x08
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#define GPIO_OUTPUT_INVERT 0x0C
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#define GPIO_OUTPUT_AUX1 0x10
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#define GPIO_OUTPUT_AUX2 0x14
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#define GPIO_PULL_UP 0x18
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#define GPIO_PULL_DOWN 0x1C
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#define GPIO_INPUT_ENABLE 0x20
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#define GPIO_INPUT_INVERT 0x24
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#define GPIO_INPUT_FILTER 0x28
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#define GPIO_INPUT_EVENT_COUNT 0x2C
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#define GPIO_READ_BACK 0x30
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#define GPIO_INPUT_AUX1 0x34
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#define GPIO_EVENTS_ENABLE 0x38
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#define GPIO_LOCK_ENABLE 0x3C
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#define GPIO_POSITIVE_EDGE_EN 0x40
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#define GPIO_NEGATIVE_EDGE_EN 0x44
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#define GPIO_POSITIVE_EDGE_STS 0x48
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#define GPIO_NEGATIVE_EDGE_STS 0x4C
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#define GPIO_MAP_X 0xE0
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#define GPIO_MAP_Y 0xE4
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#define GPIO_MAP_Z 0xE8
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#define GPIO_MAP_W 0xEC
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extern void geode_gpio_set(unsigned int, unsigned int);
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extern void geode_gpio_clear(unsigned int, unsigned int);
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extern int geode_gpio_isset(unsigned int, unsigned int);
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extern void geode_gpio_setup_event(unsigned int, int, int);
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extern void geode_gpio_set_irq(unsigned int, unsigned int);
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static inline void geode_gpio_event_irq(unsigned int gpio, int pair)
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{
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geode_gpio_setup_event(gpio, pair, 0);
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}
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static inline void geode_gpio_event_pme(unsigned int gpio, int pair)
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{
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geode_gpio_setup_event(gpio, pair, 1);
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}
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/* Specific geode tests */
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static inline int is_geode_gx(void)
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{
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return ((boot_cpu_data.x86_vendor == X86_VENDOR_NSC) &&
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(boot_cpu_data.x86 == 5) &&
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(boot_cpu_data.x86_model == 5));
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}
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static inline int is_geode_lx(void)
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{
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return ((boot_cpu_data.x86_vendor == X86_VENDOR_AMD) &&
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(boot_cpu_data.x86 == 5) &&
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(boot_cpu_data.x86_model == 10));
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}
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static inline int is_geode(void)
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{
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return (is_geode_gx() || is_geode_lx());
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}
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#endif
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