ia64/linux-2.6.18-xen.hg

view drivers/acpi/motherboard.c @ 912:dd42cdb0ab89

[IA64] Build blktap2 driver by default in x86 builds.

add CONFIG_XEN_BLKDEV_TAP2=y to buildconfigs/linux-defconfig_xen_ia64.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
author Isaku Yamahata <yamahata@valinux.co.jp>
date Mon Jun 29 12:09:16 2009 +0900 (2009-06-29)
parents 831230e53067
children
line source
1 /*
2 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation; either version 2 of the License, or (at
6 * your option) any later version.
7 *
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
16 *
17 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
18 */
20 /* Purpose: Prevent PCMCIA cards from using motherboard resources. */
22 #include <linux/kernel.h>
23 #include <linux/init.h>
24 #include <linux/types.h>
25 #include <linux/pci.h>
26 #include <linux/ioport.h>
27 #include <asm/io.h>
29 #include <acpi/acpi_bus.h>
30 #include <acpi/acpi_drivers.h>
32 #define _COMPONENT ACPI_SYSTEM_COMPONENT
33 ACPI_MODULE_NAME("acpi_motherboard")
35 /* Dell use PNP0C01 instead of PNP0C02 */
36 #define ACPI_MB_HID1 "PNP0C01"
37 #define ACPI_MB_HID2 "PNP0C02"
38 /**
39 * Doesn't care about legacy IO ports, only IO ports beyond 0x1000 are reserved
40 * Doesn't care about the failure of 'request_region', since other may reserve
41 * the io ports as well
42 */
43 #define IS_RESERVED_ADDR(base, len) \
44 (((len) > 0) && ((base) > 0) && ((base) + (len) < IO_SPACE_LIMIT) \
45 && ((base) + (len) > PCIBIOS_MIN_IO))
46 /*
47 * Clearing the flag (IORESOURCE_BUSY) allows drivers to use
48 * the io ports if they really know they can use it, while
49 * still preventing hotplug PCI devices from using it.
50 */
51 static acpi_status acpi_reserve_io_ranges(struct acpi_resource *res, void *data)
52 {
53 struct resource *requested_res = NULL;
56 if (res->type == ACPI_RESOURCE_TYPE_IO) {
57 struct acpi_resource_io *io_res = &res->data.io;
59 if (io_res->minimum != io_res->maximum)
60 return AE_OK;
61 if (IS_RESERVED_ADDR
62 (io_res->minimum, io_res->address_length)) {
63 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
64 "Motherboard resources 0x%08x - 0x%08x\n",
65 io_res->minimum,
66 io_res->minimum +
67 io_res->address_length));
68 requested_res =
69 request_region(io_res->minimum,
70 io_res->address_length, "motherboard");
71 }
72 } else if (res->type == ACPI_RESOURCE_TYPE_FIXED_IO) {
73 struct acpi_resource_fixed_io *fixed_io_res =
74 &res->data.fixed_io;
76 if (IS_RESERVED_ADDR
77 (fixed_io_res->address, fixed_io_res->address_length)) {
78 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
79 "Motherboard resources 0x%08x - 0x%08x\n",
80 fixed_io_res->address,
81 fixed_io_res->address +
82 fixed_io_res->address_length));
83 requested_res =
84 request_region(fixed_io_res->address,
85 fixed_io_res->address_length,
86 "motherboard");
87 }
88 } else {
89 /* Memory mapped IO? */
90 }
92 if (requested_res)
93 requested_res->flags &= ~IORESOURCE_BUSY;
94 return AE_OK;
95 }
97 static int acpi_motherboard_add(struct acpi_device *device)
98 {
99 if (!device)
100 return -EINVAL;
101 acpi_walk_resources(device->handle, METHOD_NAME__CRS,
102 acpi_reserve_io_ranges, NULL);
104 return 0;
105 }
107 static struct acpi_driver acpi_motherboard_driver1 = {
108 .name = "motherboard",
109 .class = "",
110 .ids = ACPI_MB_HID1,
111 .ops = {
112 .add = acpi_motherboard_add,
113 },
114 };
116 static struct acpi_driver acpi_motherboard_driver2 = {
117 .name = "motherboard",
118 .class = "",
119 .ids = ACPI_MB_HID2,
120 .ops = {
121 .add = acpi_motherboard_add,
122 },
123 };
125 static void __init acpi_request_region (struct acpi_generic_address *addr,
126 unsigned int length, char *desc)
127 {
128 if (!addr->address || !length)
129 return;
131 if (addr->address_space_id == ACPI_ADR_SPACE_SYSTEM_IO)
132 request_region(addr->address, length, desc);
133 else if (addr->address_space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
134 request_mem_region(addr->address, length, desc);
135 }
137 static void __init acpi_reserve_resources(void)
138 {
139 acpi_request_region(&acpi_gbl_FADT->xpm1a_evt_blk,
140 acpi_gbl_FADT->pm1_evt_len, "ACPI PM1a_EVT_BLK");
142 acpi_request_region(&acpi_gbl_FADT->xpm1b_evt_blk,
143 acpi_gbl_FADT->pm1_evt_len, "ACPI PM1b_EVT_BLK");
145 acpi_request_region(&acpi_gbl_FADT->xpm1a_cnt_blk,
146 acpi_gbl_FADT->pm1_cnt_len, "ACPI PM1a_CNT_BLK");
148 acpi_request_region(&acpi_gbl_FADT->xpm1b_cnt_blk,
149 acpi_gbl_FADT->pm1_cnt_len, "ACPI PM1b_CNT_BLK");
151 if (acpi_gbl_FADT->pm_tm_len == 4)
152 acpi_request_region(&acpi_gbl_FADT->xpm_tmr_blk, 4, "ACPI PM_TMR");
154 acpi_request_region(&acpi_gbl_FADT->xpm2_cnt_blk,
155 acpi_gbl_FADT->pm2_cnt_len, "ACPI PM2_CNT_BLK");
157 /* Length of GPE blocks must be a non-negative multiple of 2 */
159 if (!(acpi_gbl_FADT->gpe0_blk_len & 0x1))
160 acpi_request_region(&acpi_gbl_FADT->xgpe0_blk,
161 acpi_gbl_FADT->gpe0_blk_len, "ACPI GPE0_BLK");
163 if (!(acpi_gbl_FADT->gpe1_blk_len & 0x1))
164 acpi_request_region(&acpi_gbl_FADT->xgpe1_blk,
165 acpi_gbl_FADT->gpe1_blk_len, "ACPI GPE1_BLK");
166 }
168 static int __init acpi_motherboard_init(void)
169 {
170 acpi_bus_register_driver(&acpi_motherboard_driver1);
171 acpi_bus_register_driver(&acpi_motherboard_driver2);
172 /*
173 * Guarantee motherboard IO reservation first
174 * This module must run after scan.c
175 */
176 if (!acpi_disabled)
177 acpi_reserve_resources();
178 return 0;
179 }
181 /**
182 * Reserve motherboard resources after PCI claim BARs,
183 * but before PCI assign resources for uninitialized PCI devices
184 */
185 fs_initcall(acpi_motherboard_init);