xref: /minix3/minix/lib/libacpi/acpi.c (revision fee60e45e67240c6c98101a60bf7abc705899333)
1*fee60e45Srlfnb #define _SYSTEM
2*fee60e45Srlfnb 
3*fee60e45Srlfnb #include <errno.h>
4*fee60e45Srlfnb #include <string.h>
5*fee60e45Srlfnb 
6*fee60e45Srlfnb #include <minix/acpi.h>
7*fee60e45Srlfnb #include <minix/com.h>
8*fee60e45Srlfnb #include <minix/ds.h>
9*fee60e45Srlfnb #include <minix/ipc.h>
10*fee60e45Srlfnb #include <minix/log.h>
11*fee60e45Srlfnb #include <minix/sysutil.h>
12*fee60e45Srlfnb 
13*fee60e45Srlfnb static struct log log =
14*fee60e45Srlfnb { .name = "libacpi", .log_level = LEVEL_TRACE, .log_func = default_log };
15*fee60e45Srlfnb 
16*fee60e45Srlfnb static endpoint_t acpi_ep = NONE;
17*fee60e45Srlfnb 
18*fee60e45Srlfnb int
acpi_init(void)19*fee60e45Srlfnb acpi_init(void)
20*fee60e45Srlfnb {
21*fee60e45Srlfnb 	int res;
22*fee60e45Srlfnb 	res = ds_retrieve_label_endpt("acpi", &acpi_ep);
23*fee60e45Srlfnb 	return res;
24*fee60e45Srlfnb }
25*fee60e45Srlfnb 
26*fee60e45Srlfnb /*===========================================================================*
27*fee60e45Srlfnb  *				IRQ handling				     *
28*fee60e45Srlfnb  *===========================================================================*/
29*fee60e45Srlfnb int
acpi_get_irq(unsigned bus,unsigned dev,unsigned pin)30*fee60e45Srlfnb acpi_get_irq(unsigned bus, unsigned dev, unsigned pin)
31*fee60e45Srlfnb {
32*fee60e45Srlfnb 	int err;
33*fee60e45Srlfnb 	message m;
34*fee60e45Srlfnb 
35*fee60e45Srlfnb 	if (acpi_ep == NONE) {
36*fee60e45Srlfnb 		err = acpi_init();
37*fee60e45Srlfnb 		if (OK != err) {
38*fee60e45Srlfnb 			panic("libacpi: ds_retrieve_label_endpt failed for 'acpi': %d", err);
39*fee60e45Srlfnb 		}
40*fee60e45Srlfnb 		else {
41*fee60e45Srlfnb 			log_info(&log, "resolved acpi to endpoint: %d\n", acpi_ep);
42*fee60e45Srlfnb 		}
43*fee60e45Srlfnb 	}
44*fee60e45Srlfnb 
45*fee60e45Srlfnb 	((struct acpi_get_irq_req *)&m)->hdr.request = ACPI_REQ_GET_IRQ;
46*fee60e45Srlfnb 	((struct acpi_get_irq_req *)&m)->bus = bus;
47*fee60e45Srlfnb 	((struct acpi_get_irq_req *)&m)->dev = dev;
48*fee60e45Srlfnb 	((struct acpi_get_irq_req *)&m)->pin = pin;
49*fee60e45Srlfnb 
50*fee60e45Srlfnb 	if ((err = ipc_sendrec(acpi_ep, &m)) != OK)
51*fee60e45Srlfnb 		panic("libacpi: error %d while receiving from ACPI\n", err);
52*fee60e45Srlfnb 
53*fee60e45Srlfnb 	return ((struct acpi_get_irq_resp *)&m)->irq;
54*fee60e45Srlfnb }
55*fee60e45Srlfnb 
56*fee60e45Srlfnb /*
57*fee60e45Srlfnb  * tells acpi which two busses are connected by this bridge. The primary bus
58*fee60e45Srlfnb  * (pbnr) must be already known to acpi and it must map dev as the connection to
59*fee60e45Srlfnb  * the secondary (sbnr) bus
60*fee60e45Srlfnb  */
61*fee60e45Srlfnb void
acpi_map_bridge(unsigned int pbnr,unsigned int dev,unsigned int sbnr)62*fee60e45Srlfnb acpi_map_bridge(unsigned int pbnr, unsigned int dev, unsigned int sbnr)
63*fee60e45Srlfnb {
64*fee60e45Srlfnb 	int err;
65*fee60e45Srlfnb 	message m;
66*fee60e45Srlfnb 
67*fee60e45Srlfnb 	if (acpi_ep == NONE) {
68*fee60e45Srlfnb 		err = acpi_init();
69*fee60e45Srlfnb 		if (OK != err) {
70*fee60e45Srlfnb 			panic("libacpi: ds_retrieve_label_endpt failed for 'acpi': %d", err);
71*fee60e45Srlfnb 		}
72*fee60e45Srlfnb 	}
73*fee60e45Srlfnb 
74*fee60e45Srlfnb 	((struct acpi_map_bridge_req *)&m)->hdr.request = ACPI_REQ_MAP_BRIDGE;
75*fee60e45Srlfnb 	((struct acpi_map_bridge_req *)&m)->primary_bus = pbnr;
76*fee60e45Srlfnb 	((struct acpi_map_bridge_req *)&m)->secondary_bus = sbnr;
77*fee60e45Srlfnb 	((struct acpi_map_bridge_req *)&m)->device = dev;
78*fee60e45Srlfnb 
79*fee60e45Srlfnb 	if ((err = ipc_sendrec(acpi_ep, &m)) != OK)
80*fee60e45Srlfnb 		panic("libacpi: error %d while receiving from ACPI\n", err);
81*fee60e45Srlfnb 
82*fee60e45Srlfnb 	if (((struct acpi_map_bridge_resp *)&m)->err != OK)
83*fee60e45Srlfnb 		printf("libacpi: acpi failed to map pci (%d) to pci (%d) bridge\n",
84*fee60e45Srlfnb 								pbnr, sbnr);
85*fee60e45Srlfnb }
86