2 * Copyright (c) 1997, Stefan Esser <se@freebsd.org>
3 * Copyright (c) 2000, Michael Smith <msmith@freebsd.org>
4 * Copyright (c) 2000, BSDi
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice unmodified, this list of conditions, and the following
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 * $FreeBSD: src/sys/dev/acpica/acpi_pci.c,v 1.16 2004/05/29 04:32:50 njl Exp $
29 * $DragonFly: src/sys/dev/acpica5/acpi_pci.c,v 1.5 2006/09/05 00:55:36 dillon Exp $
34 #include <sys/param.h>
35 #include <sys/systm.h>
37 #include <sys/kernel.h>
38 #include <sys/malloc.h>
39 #include <sys/module.h>
44 #include <sys/pciio.h>
45 #include <bus/pci/pcireg.h>
46 #include <bus/pci/pcivar.h>
47 #include <bus/pci/pci_private.h>
52 /* Hooks for the ACPI CA debugging infrastructure. */
53 #define _COMPONENT ACPI_BUS
54 ACPI_MODULE_NAME("PCI")
56 struct acpi_pci_devinfo
{
57 struct pci_devinfo ap_dinfo
;
58 ACPI_HANDLE ap_handle
;
61 static int acpi_pci_probe(device_t dev
);
62 static int acpi_pci_attach(device_t dev
);
63 static int acpi_pci_read_ivar(device_t dev
, device_t child
, int which
,
65 static int acpi_pci_child_location_str_method(device_t cbdev
,
66 device_t child
, char *buf
, size_t buflen
);
69 static int acpi_pci_set_powerstate_method(device_t dev
, device_t child
,
71 static ACPI_STATUS
acpi_pci_save_handle(ACPI_HANDLE handle
, UINT32 level
,
72 void *context
, void **status
);
74 static device_method_t acpi_pci_methods
[] = {
75 /* Device interface */
76 DEVMETHOD(device_probe
, acpi_pci_probe
),
77 DEVMETHOD(device_attach
, acpi_pci_attach
),
78 DEVMETHOD(device_shutdown
, bus_generic_shutdown
),
79 DEVMETHOD(device_suspend
, bus_generic_suspend
),
80 DEVMETHOD(device_resume
, bus_generic_resume
),
83 DEVMETHOD(bus_print_child
, pci_print_child
),
84 DEVMETHOD(bus_probe_nomatch
, pci_probe_nomatch
),
85 DEVMETHOD(bus_read_ivar
, acpi_pci_read_ivar
),
86 DEVMETHOD(bus_write_ivar
, pci_write_ivar
),
87 DEVMETHOD(bus_driver_added
, bus_generic_driver_added
),
88 DEVMETHOD(bus_setup_intr
, bus_generic_setup_intr
),
89 DEVMETHOD(bus_teardown_intr
, bus_generic_teardown_intr
),
91 DEVMETHOD(bus_get_resource_list
,pci_get_resource_list
),
92 DEVMETHOD(bus_set_resource
, bus_generic_rl_set_resource
),
93 DEVMETHOD(bus_get_resource
, bus_generic_rl_get_resource
),
94 DEVMETHOD(bus_delete_resource
, pci_delete_resource
),
95 DEVMETHOD(bus_alloc_resource
, pci_alloc_resource
),
96 DEVMETHOD(bus_release_resource
, bus_generic_rl_release_resource
),
97 DEVMETHOD(bus_activate_resource
, bus_generic_activate_resource
),
98 DEVMETHOD(bus_deactivate_resource
, bus_generic_deactivate_resource
),
99 DEVMETHOD(bus_child_pnpinfo_str
, pci_child_pnpinfo_str_method
),
100 DEVMETHOD(bus_child_location_str
, acpi_pci_child_location_str_method
),
103 DEVMETHOD(pci_read_config
, pci_read_config_method
),
104 DEVMETHOD(pci_write_config
, pci_write_config_method
),
105 DEVMETHOD(pci_enable_busmaster
, pci_enable_busmaster_method
),
106 DEVMETHOD(pci_disable_busmaster
, pci_disable_busmaster_method
),
107 DEVMETHOD(pci_enable_io
, pci_enable_io_method
),
108 DEVMETHOD(pci_disable_io
, pci_disable_io_method
),
109 DEVMETHOD(pci_get_powerstate
, pci_get_powerstate_method
),
110 DEVMETHOD(pci_set_powerstate
, acpi_pci_set_powerstate_method
),
111 DEVMETHOD(pci_assign_interrupt
, pci_assign_interrupt_method
),
116 static driver_t acpi_pci_driver
= {
122 DRIVER_MODULE(acpi_pci
, pcib
, acpi_pci_driver
, pci_devclass
, 0, 0);
123 MODULE_DEPEND(acpi_pci
, acpi
, 1, 1, 1);
124 MODULE_VERSION(acpi_pci
, 1);
127 acpi_pci_read_ivar(device_t dev
, device_t child
, int which
, uintptr_t *result
)
129 struct acpi_pci_devinfo
*dinfo
;
132 case ACPI_IVAR_HANDLE
:
133 dinfo
= device_get_ivars(child
);
134 *result
= (uintptr_t)dinfo
->ap_handle
;
137 return (pci_read_ivar(dev
, child
, which
, result
));
141 acpi_pci_child_location_str_method(device_t cbdev
, device_t child
, char *buf
,
144 struct acpi_pci_devinfo
*dinfo
= device_get_ivars(child
);
146 pci_child_location_str_method(cbdev
, child
, buf
, buflen
);
148 if (dinfo
->ap_handle
) {
149 strlcat(buf
, " path=", buflen
);
150 strlcat(buf
, acpi_name(dinfo
->ap_handle
), buflen
);
156 * PCI power manangement
159 acpi_pci_set_powerstate_method(device_t dev
, device_t child
, int state
)
163 int acpi_state
, old_state
, error
;
166 case PCI_POWERSTATE_D0
:
167 acpi_state
= ACPI_STATE_D0
;
169 case PCI_POWERSTATE_D1
:
170 acpi_state
= ACPI_STATE_D1
;
172 case PCI_POWERSTATE_D2
:
173 acpi_state
= ACPI_STATE_D2
;
175 case PCI_POWERSTATE_D3
:
176 acpi_state
= ACPI_STATE_D3
;
183 * We set the state using PCI Power Management outside of setting
184 * the ACPI state. This means that when powering down a device, we
185 * first shut it down using PCI, and then using ACPI, which lets ACPI
186 * try to power down any Power Resources that are now no longer used.
187 * When powering up a device, we let ACPI set the state first so that
188 * it can enable any needed Power Resources before changing the PCI
191 old_state
= pci_get_powerstate(child
);
192 if (old_state
< state
) {
193 error
= pci_set_powerstate_method(dev
, child
, state
);
197 h
= acpi_get_handle(child
);
199 status
= acpi_pwr_switch_consumer(h
, acpi_state
);
200 if (ACPI_FAILURE(status
))
202 "Failed to set ACPI power state D%d on %s: %s\n",
203 acpi_state
, device_get_nameunit(child
),
204 AcpiFormatException(status
));
206 if (old_state
> state
)
207 return (pci_set_powerstate_method(dev
, child
, state
));
213 acpi_pci_save_handle(ACPI_HANDLE handle
, UINT32 level
, void *context
,
216 struct acpi_pci_devinfo
*dinfo
;
218 int devcount
, i
, func
, slot
;
221 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__
);
223 if (ACPI_FAILURE(acpi_GetInteger(handle
, "_ADR", &address
)))
224 return_ACPI_STATUS (AE_OK
);
225 slot
= address
>> 16;
226 func
= address
& 0xffff;
227 if (device_get_children((device_t
)context
, &devlist
, &devcount
) != 0)
228 return_ACPI_STATUS (AE_OK
);
229 for (i
= 0; i
< devcount
; i
++) {
230 dinfo
= device_get_ivars(devlist
[i
]);
231 if (dinfo
->ap_dinfo
.cfg
.func
== func
&&
232 dinfo
->ap_dinfo
.cfg
.slot
== slot
) {
233 dinfo
->ap_handle
= handle
;
234 kfree(devlist
, M_TEMP
);
235 return_ACPI_STATUS (AE_OK
);
238 kfree(devlist
, M_TEMP
);
239 return_ACPI_STATUS (AE_OK
);
243 acpi_pci_probe(device_t dev
)
245 if (pcib_get_bus(device_get_parent(dev
)) < 0)
247 if (acpi_get_handle(dev
) == NULL
)
249 device_set_desc(dev
, "ACPI PCI bus");
254 acpi_pci_attach(device_t dev
)
259 * Since there can be multiple independantly numbered PCI
260 * busses on some large alpha systems, we can't use the unit
261 * number to decide what bus we are probing. We ask the parent
262 * pcib what our bus number is.
264 busno
= pcib_get_bus(device_get_parent(dev
));
266 device_printf(dev
, "physical bus=%d\n", busno
);
269 * First, PCI devices are added as in the normal PCI bus driver.
270 * Afterwards, the ACPI namespace under the bridge driver is
271 * walked to save ACPI handles to all the devices that appear in
272 * the ACPI namespace as immediate descendants of the bridge.
274 * XXX: Sometimes PCI devices show up in the ACPI namespace that
275 * pci_add_children() doesn't find. We currently just ignore
278 pci_add_children(dev
, busno
, sizeof(struct acpi_pci_devinfo
));
279 AcpiWalkNamespace(ACPI_TYPE_DEVICE
, acpi_get_handle(dev
), 1,
280 acpi_pci_save_handle
, dev
, NULL
);
282 return (bus_generic_attach(dev
));