6 #include <sys/malloc.h>
7 #include <sys/module.h>
8 #include <sys/kernel.h>
10 #include <sys/sysctl.h>
11 #include <sys/types.h>
14 #include <machine/bus.h>
16 #include <machine/resource.h>
18 #include <dev/spibus/spibusvar.h>
19 #include <dev/spibus/spi.h>
20 #include "spibus_if.h"
23 spibus_probe(device_t dev)
25 device_set_desc(dev, "spibus bus");
26 return (BUS_PROBE_GENERIC);
30 spibus_attach(device_t dev)
32 struct spibus_softc *sc = SPIBUS_SOFTC(dev);
35 bus_enumerate_hinted_children(dev);
36 return (bus_generic_attach(dev));
40 * Since this is not a self-enumerating bus, and since we always add
41 * children in attach, we have to always delete children here.
44 spibus_detach(device_t dev)
49 if ((err = bus_generic_detach(dev)) != 0)
51 if ((err = device_get_children(dev, &devlist, &ndevs)) != 0)
53 for (i = 0; i < ndevs; i++)
54 device_delete_child(dev, devlist[i]);
55 free(devlist, M_TEMP);
61 spibus_suspend(device_t dev)
63 return (bus_generic_suspend(dev));
68 spibus_resume(device_t dev)
70 return (bus_generic_resume(dev));
74 spibus_print_child(device_t dev, device_t child)
76 struct spibus_ivar *devi = SPIBUS_IVAR(child);
79 retval += bus_print_child_header(dev, child);
80 retval += printf(" at cs %d", devi->cs);
81 retval += bus_print_child_footer(dev, child);
87 spibus_probe_nomatch(device_t bus, device_t child)
89 struct spibus_ivar *devi = SPIBUS_IVAR(child);
91 device_printf(bus, "<unknown card>");
92 printf(" at cs %d\n", devi->cs);
97 spibus_child_location_str(device_t bus, device_t child, char *buf,
100 struct spibus_ivar *devi = SPIBUS_IVAR(child);
102 snprintf(buf, buflen, "cs=%d", devi->cs);
107 spibus_child_pnpinfo_str(device_t bus, device_t child, char *buf,
115 spibus_read_ivar(device_t bus, device_t child, int which, u_int *result)
117 struct spibus_ivar *devi = SPIBUS_IVAR(child);
123 *(uint32_t *)result = devi->cs;
130 spibus_add_child(device_t dev, u_int order, const char *name, int unit)
133 struct spibus_ivar *devi;
135 child = device_add_child_ordered(dev, order, name, unit);
138 devi = malloc(sizeof(struct spibus_ivar), M_DEVBUF, M_NOWAIT | M_ZERO);
140 device_delete_child(dev, child);
143 device_set_ivars(child, devi);
148 spibus_hinted_child(device_t bus, const char *dname, int dunit)
151 struct spibus_ivar *devi;
153 child = BUS_ADD_CHILD(bus, 0, dname, dunit);
154 devi = SPIBUS_IVAR(child);
155 resource_int_value(dname, dunit, "cs", &devi->cs);
159 spibus_transfer_impl(device_t dev, device_t child, struct spi_command *cmd)
161 return (SPIBUS_TRANSFER(device_get_parent(dev), child, cmd));
164 static device_method_t spibus_methods[] = {
165 /* Device interface */
166 DEVMETHOD(device_probe, spibus_probe),
167 DEVMETHOD(device_attach, spibus_attach),
168 DEVMETHOD(device_detach, spibus_detach),
169 DEVMETHOD(device_shutdown, bus_generic_shutdown),
170 DEVMETHOD(device_suspend, spibus_suspend),
171 DEVMETHOD(device_resume, spibus_resume),
174 DEVMETHOD(bus_add_child, spibus_add_child),
175 DEVMETHOD(bus_print_child, spibus_print_child),
176 DEVMETHOD(bus_probe_nomatch, spibus_probe_nomatch),
177 DEVMETHOD(bus_read_ivar, spibus_read_ivar),
178 DEVMETHOD(bus_child_pnpinfo_str, spibus_child_pnpinfo_str),
179 DEVMETHOD(bus_child_location_str, spibus_child_location_str),
180 DEVMETHOD(bus_hinted_child, spibus_hinted_child),
182 /* spibus interface */
183 DEVMETHOD(spibus_transfer, spibus_transfer_impl),
188 driver_t spibus_driver = {
191 sizeof(struct spibus_softc)
194 devclass_t spibus_devclass;
196 DRIVER_MODULE(spibus, spi, spibus_driver, spibus_devclass, 0, 0);
197 MODULE_VERSION(spibus, 1);