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_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);