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>

1 files changed, 159 insertions, 0 deletions

diff --git a/include/asm-i386/geode.h b/include/asm-i386/geode.h
new file mode 100644
index 00000000000..6da4bbbea3d
--- /dev/null
+++ b/include/asm-i386/geode.h
@@ -0,0 +1,159 @@
+/*
+ * 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