2 * Copyright (c) 2003 Matthew N. Dodd <winter@jurai.net>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/kernel.h>
33 #include <sys/malloc.h>
35 #include <sys/module.h>
39 #include <machine/bus.h>
40 #include <machine/resource.h>
43 /* And all this for BIOS_PADDRTOVADDR() */
45 #include <vm/vm_param.h>
47 #include <machine/md_var.h>
48 #include <machine/pc/bios.h>
50 #include <machine/smapi.h>
52 #define SMAPI_START 0xf0000
53 #define SMAPI_STEP 0x10
56 #define SMAPI_SIG "$SMB"
58 #define RES2HDR(res) ((struct smapi_bios_header *)rman_get_virtual(res))
59 #define ADDR2HDR(addr) ((struct smapi_bios_header *)BIOS_PADDRTOVADDR(addr))
64 struct resource * res;
67 u_int32_t smapi32_entry;
69 struct smapi_bios_header *header;
72 extern u_long smapi32_offset;
73 extern u_short smapi32_segment;
75 devclass_t smapi_devclass;
77 static d_ioctl_t smapi_ioctl;
79 static struct cdevsw smapi_cdevsw = {
80 .d_version = D_VERSION,
81 .d_ioctl = smapi_ioctl,
83 .d_flags = D_MEM | D_NEEDGIANT,
86 static void smapi_identify(driver_t *, device_t);
87 static int smapi_probe(device_t);
88 static int smapi_attach(device_t);
89 static int smapi_detach(device_t);
90 static int smapi_modevent(module_t, int, void *);
92 static int smapi_header_cksum(struct smapi_bios_header *);
94 extern int smapi32(struct smapi_bios_parameter *,
95 struct smapi_bios_parameter *);
96 extern int smapi32_new(u_long, u_short,
97 struct smapi_bios_parameter *,
98 struct smapi_bios_parameter *);
101 smapi_ioctl (struct cdev *dev, u_long cmd, caddr_t data, int fflag, struct thread *td)
103 struct smapi_softc *sc;
107 sc = devclass_get_softc(smapi_devclass, dev2unit(dev));
115 bcopy((caddr_t)sc->header, data,
116 sizeof(struct smapi_bios_header));
119 case SMAPIOCGFUNCTION:
120 smapi32_offset = sc->smapi32_entry;
121 error = smapi32((struct smapi_bios_parameter *)data,
122 (struct smapi_bios_parameter *)data);
133 smapi_header_cksum (struct smapi_bios_header *header)
139 ptr = (u_int8_t *)header;
141 for (i = 0; i < header->length; i++) {
149 smapi_identify (driver_t *driver, device_t parent)
156 if (!device_is_alive(parent))
159 addr = bios_sigsearch(SMAPI_START, SMAPI_SIG, SMAPI_LEN,
160 SMAPI_STEP, SMAPI_OFF);
163 length = ADDR2HDR(addr)->length;
165 child = BUS_ADD_CHILD(parent, 5, "smapi", -1);
166 device_set_driver(child, driver);
167 bus_set_resource(child, SYS_RES_MEMORY, rid, addr, length);
168 device_set_desc(child, "SMAPI BIOS");
175 smapi_probe (device_t dev)
177 struct resource *res;
183 res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
185 device_printf(dev, "Unable to allocate memory resource.\n");
190 if (smapi_header_cksum(RES2HDR(res))) {
191 device_printf(dev, "SMAPI header checksum failed.\n");
198 bus_release_resource(dev, SYS_RES_MEMORY, rid, res);
203 smapi_attach (device_t dev)
205 struct smapi_softc *sc;
208 sc = device_get_softc(dev);
213 sc->res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->rid,
215 if (sc->res == NULL) {
216 device_printf(dev, "Unable to allocate memory resource.\n");
220 sc->header = (struct smapi_bios_header *)rman_get_virtual(sc->res);
221 sc->smapi32_entry = (u_int32_t)BIOS_PADDRTOVADDR(
222 sc->header->prot32_segment +
223 sc->header->prot32_offset);
225 sc->cdev = make_dev(&smapi_cdevsw,
226 device_get_unit(sc->dev),
227 UID_ROOT, GID_WHEEL, 0600,
230 device_get_unit(sc->dev));
232 device_printf(dev, "Version: %d.%02d, Length: %d, Checksum: 0x%02x\n",
233 bcd2bin(sc->header->version_major),
234 bcd2bin(sc->header->version_minor),
236 sc->header->checksum);
237 device_printf(dev, "Information=0x%b\n",
238 sc->header->information,
245 if (sc->header->information & SMAPI_REAL_VM86)
246 device_printf(dev, "Real/VM86 mode: Segment 0x%04x, Offset 0x%04x\n",
247 sc->header->real16_segment,
248 sc->header->real16_offset);
249 if (sc->header->information & SMAPI_PROT_16BIT)
250 device_printf(dev, "16-bit Protected mode: Segment 0x%08x, Offset 0x%04x\n",
251 sc->header->prot16_segment,
252 sc->header->prot16_offset);
253 if (sc->header->information & SMAPI_PROT_32BIT)
254 device_printf(dev, "32-bit Protected mode: Segment 0x%08x, Offset 0x%08x\n",
255 sc->header->prot32_segment,
256 sc->header->prot32_offset);
262 bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res);
267 smapi_detach (device_t dev)
269 struct smapi_softc *sc;
271 sc = device_get_softc(dev);
273 destroy_dev(sc->cdev);
276 bus_release_resource(dev, SYS_RES_MEMORY, sc->rid, sc->res);
282 smapi_modevent (module_t mod, int what, void *arg)
292 devclass_get_devices(smapi_devclass, &devs, &count);
293 for (i = 0; i < count; i++) {
294 device_delete_child(device_get_parent(devs[i]), devs[i]);
305 static device_method_t smapi_methods[] = {
306 /* Device interface */
307 DEVMETHOD(device_identify, smapi_identify),
308 DEVMETHOD(device_probe, smapi_probe),
309 DEVMETHOD(device_attach, smapi_attach),
310 DEVMETHOD(device_detach, smapi_detach),
314 static driver_t smapi_driver = {
317 sizeof(struct smapi_softc),
320 DRIVER_MODULE(smapi, nexus, smapi_driver, smapi_devclass, smapi_modevent, 0);
321 MODULE_VERSION(smapi, 1);