Andres Salomon | f62e518 | 2007-07-21 17:11:38 +0200 | [diff] [blame] | 1 | /* |
| 2 | * AMD Geode southbridge support code |
| 3 | * Copyright (C) 2006, Advanced Micro Devices, Inc. |
Andres Salomon | ade7614 | 2008-01-30 13:33:35 +0100 | [diff] [blame] | 4 | * Copyright (C) 2007, Andres Salomon <dilinger@debian.org> |
Andres Salomon | f62e518 | 2007-07-21 17:11:38 +0200 | [diff] [blame] | 5 | * |
| 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. |
| 9 | */ |
| 10 | |
| 11 | #include <linux/kernel.h> |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/ioport.h> |
| 14 | #include <linux/io.h> |
| 15 | #include <asm/msr.h> |
| 16 | #include <asm/geode.h> |
| 17 | |
| 18 | static struct { |
| 19 | char *name; |
| 20 | u32 msr; |
| 21 | int size; |
| 22 | u32 base; |
| 23 | } lbars[] = { |
| 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 } |
| 28 | }; |
| 29 | |
| 30 | static void __init init_lbars(void) |
| 31 | { |
| 32 | u32 lo, hi; |
| 33 | int i; |
| 34 | |
| 35 | for (i = 0; i < ARRAY_SIZE(lbars); i++) { |
| 36 | rdmsr(lbars[i].msr, lo, hi); |
| 37 | if (hi & 0x01) |
| 38 | lbars[i].base = lo & 0x0000ffff; |
| 39 | |
| 40 | if (lbars[i].base == 0) |
| 41 | printk(KERN_ERR "geode: Couldn't initialize '%s'\n", |
| 42 | lbars[i].name); |
| 43 | } |
| 44 | } |
| 45 | |
| 46 | int geode_get_dev_base(unsigned int dev) |
| 47 | { |
| 48 | BUG_ON(dev >= ARRAY_SIZE(lbars)); |
| 49 | return lbars[dev].base; |
| 50 | } |
| 51 | EXPORT_SYMBOL_GPL(geode_get_dev_base); |
| 52 | |
| 53 | /* === GPIO API === */ |
| 54 | |
Andres Salomon | ade7614 | 2008-01-30 13:33:35 +0100 | [diff] [blame] | 55 | void geode_gpio_set(u32 gpio, unsigned int reg) |
Andres Salomon | f62e518 | 2007-07-21 17:11:38 +0200 | [diff] [blame] | 56 | { |
| 57 | u32 base = geode_get_dev_base(GEODE_DEV_GPIO); |
| 58 | |
| 59 | if (!base) |
| 60 | return; |
| 61 | |
Andres Salomon | ade7614 | 2008-01-30 13:33:35 +0100 | [diff] [blame] | 62 | /* low bank register */ |
| 63 | if (gpio & 0xFFFF) |
| 64 | outl(gpio & 0xFFFF, base + reg); |
| 65 | /* high bank register */ |
| 66 | gpio >>= 16; |
| 67 | if (gpio) |
| 68 | outl(gpio, base + 0x80 + reg); |
Andres Salomon | f62e518 | 2007-07-21 17:11:38 +0200 | [diff] [blame] | 69 | } |
| 70 | EXPORT_SYMBOL_GPL(geode_gpio_set); |
| 71 | |
Andres Salomon | ade7614 | 2008-01-30 13:33:35 +0100 | [diff] [blame] | 72 | void geode_gpio_clear(u32 gpio, unsigned int reg) |
Andres Salomon | f62e518 | 2007-07-21 17:11:38 +0200 | [diff] [blame] | 73 | { |
| 74 | u32 base = geode_get_dev_base(GEODE_DEV_GPIO); |
| 75 | |
| 76 | if (!base) |
| 77 | return; |
| 78 | |
Andres Salomon | ade7614 | 2008-01-30 13:33:35 +0100 | [diff] [blame] | 79 | /* low bank register */ |
| 80 | if (gpio & 0xFFFF) |
| 81 | outl((gpio & 0xFFFF) << 16, base + reg); |
| 82 | /* high bank register */ |
| 83 | gpio &= (0xFFFF << 16); |
| 84 | if (gpio) |
| 85 | outl(gpio, base + 0x80 + reg); |
Andres Salomon | f62e518 | 2007-07-21 17:11:38 +0200 | [diff] [blame] | 86 | } |
| 87 | EXPORT_SYMBOL_GPL(geode_gpio_clear); |
| 88 | |
Andres Salomon | ade7614 | 2008-01-30 13:33:35 +0100 | [diff] [blame] | 89 | int geode_gpio_isset(u32 gpio, unsigned int reg) |
Andres Salomon | f62e518 | 2007-07-21 17:11:38 +0200 | [diff] [blame] | 90 | { |
| 91 | u32 base = geode_get_dev_base(GEODE_DEV_GPIO); |
Andres Salomon | ade7614 | 2008-01-30 13:33:35 +0100 | [diff] [blame] | 92 | u32 val; |
Andres Salomon | f62e518 | 2007-07-21 17:11:38 +0200 | [diff] [blame] | 93 | |
| 94 | if (!base) |
| 95 | return 0; |
| 96 | |
Andres Salomon | ade7614 | 2008-01-30 13:33:35 +0100 | [diff] [blame] | 97 | /* low bank register */ |
| 98 | if (gpio & 0xFFFF) { |
| 99 | val = inl(base + reg) & (gpio & 0xFFFF); |
| 100 | if ((gpio & 0xFFFF) == val) |
| 101 | return 1; |
| 102 | } |
| 103 | /* high bank register */ |
| 104 | gpio >>= 16; |
| 105 | if (gpio) { |
| 106 | val = inl(base + 0x80 + reg) & gpio; |
| 107 | if (gpio == val) |
| 108 | return 1; |
| 109 | } |
| 110 | return 0; |
Andres Salomon | f62e518 | 2007-07-21 17:11:38 +0200 | [diff] [blame] | 111 | } |
| 112 | EXPORT_SYMBOL_GPL(geode_gpio_isset); |
| 113 | |
| 114 | void geode_gpio_set_irq(unsigned int group, unsigned int irq) |
| 115 | { |
| 116 | u32 lo, hi; |
| 117 | |
| 118 | if (group > 7 || irq > 15) |
| 119 | return; |
| 120 | |
| 121 | rdmsr(MSR_PIC_ZSEL_HIGH, lo, hi); |
| 122 | |
| 123 | lo &= ~(0xF << (group * 4)); |
| 124 | lo |= (irq & 0xF) << (group * 4); |
| 125 | |
| 126 | wrmsr(MSR_PIC_ZSEL_HIGH, lo, hi); |
| 127 | } |
| 128 | EXPORT_SYMBOL_GPL(geode_gpio_set_irq); |
| 129 | |
| 130 | void geode_gpio_setup_event(unsigned int gpio, int pair, int pme) |
| 131 | { |
| 132 | u32 base = geode_get_dev_base(GEODE_DEV_GPIO); |
| 133 | u32 offset, shift, val; |
| 134 | |
| 135 | if (gpio >= 24) |
| 136 | offset = GPIO_MAP_W; |
| 137 | else if (gpio >= 16) |
| 138 | offset = GPIO_MAP_Z; |
| 139 | else if (gpio >= 8) |
| 140 | offset = GPIO_MAP_Y; |
| 141 | else |
| 142 | offset = GPIO_MAP_X; |
| 143 | |
| 144 | shift = (gpio % 8) * 4; |
| 145 | |
| 146 | val = inl(base + offset); |
| 147 | |
| 148 | /* Clear whatever was there before */ |
| 149 | val &= ~(0xF << shift); |
| 150 | |
| 151 | /* And set the new value */ |
| 152 | |
| 153 | val |= ((pair & 7) << shift); |
| 154 | |
| 155 | /* Set the PME bit if this is a PME event */ |
| 156 | |
| 157 | if (pme) |
| 158 | val |= (1 << (shift + 3)); |
| 159 | |
| 160 | outl(val, base + offset); |
| 161 | } |
| 162 | EXPORT_SYMBOL_GPL(geode_gpio_setup_event); |
| 163 | |
| 164 | static int __init geode_southbridge_init(void) |
| 165 | { |
| 166 | if (!is_geode()) |
| 167 | return -ENODEV; |
| 168 | |
| 169 | init_lbars(); |
Jordan Crouse | f087515 | 2008-02-09 23:24:08 +0100 | [diff] [blame] | 170 | (void) mfgpt_timer_setup(); |
Andres Salomon | f62e518 | 2007-07-21 17:11:38 +0200 | [diff] [blame] | 171 | return 0; |
| 172 | } |
| 173 | |
| 174 | postcore_initcall(geode_southbridge_init); |