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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 | /* * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or (at * your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ /* Purpose: Prevent PCMCIA cards from using motherboard resources. */ #include <linux/kernel.h> #include <linux/init.h> #include <linux/types.h> #include <linux/pci.h> #include <linux/ioport.h> #include <asm/io.h> #include <acpi/acpi_bus.h> #include <acpi/acpi_drivers.h> #define _COMPONENT ACPI_SYSTEM_COMPONENT ACPI_MODULE_NAME("acpi_motherboard") /* Dell use PNP0C01 instead of PNP0C02 */ #define ACPI_MB_HID1 "PNP0C01" #define ACPI_MB_HID2 "PNP0C02" /** * Doesn't care about legacy IO ports, only IO ports beyond 0x1000 are reserved * Doesn't care about the failure of 'request_region', since other may reserve * the io ports as well */ #define IS_RESERVED_ADDR(base, len) \ (((len) > 0) && ((base) > 0) && ((base) + (len) < IO_SPACE_LIMIT) \ && ((base) + (len) > PCIBIOS_MIN_IO)) /* * Clearing the flag (IORESOURCE_BUSY) allows drivers to use * the io ports if they really know they can use it, while * still preventing hotplug PCI devices from using it. */ static acpi_status acpi_reserve_io_ranges(struct acpi_resource *res, void *data) { struct resource *requested_res = NULL; ACPI_FUNCTION_TRACE("acpi_reserve_io_ranges"); if (res->type == ACPI_RESOURCE_TYPE_IO) { struct acpi_resource_io *io_res = &res->data.io; if (io_res->minimum != io_res->maximum) return_VALUE(AE_OK); if (IS_RESERVED_ADDR (io_res->minimum, io_res->address_length)) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Motherboard resources 0x%08x - 0x%08x\n", io_res->minimum, io_res->minimum + io_res->address_length)); requested_res = request_region(io_res->minimum, io_res->address_length, "motherboard"); } } else if (res->type == ACPI_RESOURCE_TYPE_FIXED_IO) { struct acpi_resource_fixed_io *fixed_io_res = &res->data.fixed_io; if (IS_RESERVED_ADDR (fixed_io_res->address, fixed_io_res->address_length)) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Motherboard resources 0x%08x - 0x%08x\n", fixed_io_res->address, fixed_io_res->address + fixed_io_res->address_length)); requested_res = request_region(fixed_io_res->address, fixed_io_res->address_length, "motherboard"); } } else { /* Memory mapped IO? */ } if (requested_res) requested_res->flags &= ~IORESOURCE_BUSY; return_VALUE(AE_OK); } static int acpi_motherboard_add(struct acpi_device *device) { if (!device) return -EINVAL; acpi_walk_resources(device->handle, METHOD_NAME__CRS, acpi_reserve_io_ranges, NULL); return 0; } static struct acpi_driver acpi_motherboard_driver1 = { .name = "motherboard", .class = "", .ids = ACPI_MB_HID1, .ops = { .add = acpi_motherboard_add, }, }; static struct acpi_driver acpi_motherboard_driver2 = { .name = "motherboard", .class = "", .ids = ACPI_MB_HID2, .ops = { .add = acpi_motherboard_add, }, }; static void __init acpi_reserve_resources(void) { if (acpi_gbl_FADT->xpm1a_evt_blk.address && acpi_gbl_FADT->pm1_evt_len) request_region(acpi_gbl_FADT->xpm1a_evt_blk.address, acpi_gbl_FADT->pm1_evt_len, "PM1a_EVT_BLK"); if (acpi_gbl_FADT->xpm1b_evt_blk.address && acpi_gbl_FADT->pm1_evt_len) request_region(acpi_gbl_FADT->xpm1b_evt_blk.address, acpi_gbl_FADT->pm1_evt_len, "PM1b_EVT_BLK"); if (acpi_gbl_FADT->xpm1a_cnt_blk.address && acpi_gbl_FADT->pm1_cnt_len) request_region(acpi_gbl_FADT->xpm1a_cnt_blk.address, acpi_gbl_FADT->pm1_cnt_len, "PM1a_CNT_BLK"); if (acpi_gbl_FADT->xpm1b_cnt_blk.address && acpi_gbl_FADT->pm1_cnt_len) request_region(acpi_gbl_FADT->xpm1b_cnt_blk.address, acpi_gbl_FADT->pm1_cnt_len, "PM1b_CNT_BLK"); if (acpi_gbl_FADT->xpm_tmr_blk.address && acpi_gbl_FADT->pm_tm_len == 4) request_region(acpi_gbl_FADT->xpm_tmr_blk.address, 4, "PM_TMR"); if (acpi_gbl_FADT->xpm2_cnt_blk.address && acpi_gbl_FADT->pm2_cnt_len) request_region(acpi_gbl_FADT->xpm2_cnt_blk.address, acpi_gbl_FADT->pm2_cnt_len, "PM2_CNT_BLK"); /* Length of GPE blocks must be a non-negative multiple of 2 */ if (acpi_gbl_FADT->xgpe0_blk.address && acpi_gbl_FADT->gpe0_blk_len && !(acpi_gbl_FADT->gpe0_blk_len & 0x1)) request_region(acpi_gbl_FADT->xgpe0_blk.address, acpi_gbl_FADT->gpe0_blk_len, "GPE0_BLK"); if (acpi_gbl_FADT->xgpe1_blk.address && acpi_gbl_FADT->gpe1_blk_len && !(acpi_gbl_FADT->gpe1_blk_len & 0x1)) request_region(acpi_gbl_FADT->xgpe1_blk.address, acpi_gbl_FADT->gpe1_blk_len, "GPE1_BLK"); } static int __init acpi_motherboard_init(void) { acpi_bus_register_driver(&acpi_motherboard_driver1); acpi_bus_register_driver(&acpi_motherboard_driver2); /* * Guarantee motherboard IO reservation first * This module must run after scan.c */ if (!acpi_disabled) acpi_reserve_resources(); return 0; } /** * Reserve motherboard resources after PCI claim BARs, * but before PCI assign resources for uninitialized PCI devices */ fs_initcall(acpi_motherboard_init); |