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.
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.
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.
17 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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>
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"
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
43 #define IS_RESERVED_ADDR(base, len) \
44 (((len) > 0) && ((base) > 0) && ((base) + (len) < IO_SPACE_LIMIT) \
45 && ((base) + (len) > PCIBIOS_MIN_IO))
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.
51 static acpi_status
acpi_reserve_io_ranges(struct acpi_resource
*res
, void *data
)
53 struct resource
*requested_res
= NULL
;
55 ACPI_FUNCTION_TRACE("acpi_reserve_io_ranges");
57 if (res
->type
== ACPI_RESOURCE_TYPE_IO
) {
58 struct acpi_resource_io
*io_res
= &res
->data
.io
;
60 if (io_res
->minimum
!= io_res
->maximum
)
63 (io_res
->minimum
, io_res
->address_length
)) {
64 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
65 "Motherboard resources 0x%08x - 0x%08x\n",
68 io_res
->address_length
));
70 request_region(io_res
->minimum
,
71 io_res
->address_length
, "motherboard");
73 } else if (res
->type
== ACPI_RESOURCE_TYPE_FIXED_IO
) {
74 struct acpi_resource_fixed_io
*fixed_io_res
=
78 (fixed_io_res
->address
, fixed_io_res
->address_length
)) {
79 ACPI_DEBUG_PRINT((ACPI_DB_INFO
,
80 "Motherboard resources 0x%08x - 0x%08x\n",
81 fixed_io_res
->address
,
82 fixed_io_res
->address
+
83 fixed_io_res
->address_length
));
85 request_region(fixed_io_res
->address
,
86 fixed_io_res
->address_length
,
90 /* Memory mapped IO? */
94 requested_res
->flags
&= ~IORESOURCE_BUSY
;
98 static int acpi_motherboard_add(struct acpi_device
*device
)
102 acpi_walk_resources(device
->handle
, METHOD_NAME__CRS
,
103 acpi_reserve_io_ranges
, NULL
);
108 static struct acpi_driver acpi_motherboard_driver1
= {
109 .name
= "motherboard",
113 .add
= acpi_motherboard_add
,
117 static struct acpi_driver acpi_motherboard_driver2
= {
118 .name
= "motherboard",
122 .add
= acpi_motherboard_add
,
126 static void __init
acpi_request_region (struct acpi_generic_address
*addr
,
127 unsigned int length
, char *desc
)
129 if (!addr
->address
|| !length
)
132 if (addr
->address_space_id
== ACPI_ADR_SPACE_SYSTEM_IO
)
133 request_region(addr
->address
, length
, desc
);
134 else if (addr
->address_space_id
== ACPI_ADR_SPACE_SYSTEM_MEMORY
)
135 request_mem_region(addr
->address
, length
, desc
);
138 static void __init
acpi_reserve_resources(void)
140 acpi_request_region(&acpi_gbl_FADT
->xpm1a_evt_blk
,
141 acpi_gbl_FADT
->pm1_evt_len
, "ACPI PM1a_EVT_BLK");
143 acpi_request_region(&acpi_gbl_FADT
->xpm1b_evt_blk
,
144 acpi_gbl_FADT
->pm1_evt_len
, "ACPI PM1b_EVT_BLK");
146 acpi_request_region(&acpi_gbl_FADT
->xpm1a_cnt_blk
,
147 acpi_gbl_FADT
->pm1_cnt_len
, "ACPI PM1a_CNT_BLK");
149 acpi_request_region(&acpi_gbl_FADT
->xpm1b_cnt_blk
,
150 acpi_gbl_FADT
->pm1_cnt_len
, "ACPI PM1b_CNT_BLK");
152 if (acpi_gbl_FADT
->pm_tm_len
== 4)
153 acpi_request_region(&acpi_gbl_FADT
->xpm_tmr_blk
, 4, "ACPI PM_TMR");
155 acpi_request_region(&acpi_gbl_FADT
->xpm2_cnt_blk
,
156 acpi_gbl_FADT
->pm2_cnt_len
, "ACPI PM2_CNT_BLK");
158 /* Length of GPE blocks must be a non-negative multiple of 2 */
160 if (!(acpi_gbl_FADT
->gpe0_blk_len
& 0x1))
161 acpi_request_region(&acpi_gbl_FADT
->xgpe0_blk
,
162 acpi_gbl_FADT
->gpe0_blk_len
, "ACPI GPE0_BLK");
164 if (!(acpi_gbl_FADT
->gpe1_blk_len
& 0x1))
165 acpi_request_region(&acpi_gbl_FADT
->xgpe1_blk
,
166 acpi_gbl_FADT
->gpe1_blk_len
, "ACPI GPE1_BLK");
169 static int __init
acpi_motherboard_init(void)
171 acpi_bus_register_driver(&acpi_motherboard_driver1
);
172 acpi_bus_register_driver(&acpi_motherboard_driver2
);
174 * Guarantee motherboard IO reservation first
175 * This module must run after scan.c
178 acpi_reserve_resources();
183 * Reserve motherboard resources after PCI claim BARs,
184 * but before PCI assign resources for uninitialized PCI devices
186 fs_initcall(acpi_motherboard_init
);