xref: /freebsd/sys/isa/vga_isa.c (revision 1e413cf93298b5b97441a21d9a50fdcd0ee9945e)
1 /*-
2  * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer as
10  *    the first lines of this file unmodified.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25  */
26 
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29 
30 #include "opt_vga.h"
31 #include "opt_fb.h"
32 #include "opt_syscons.h"	/* should be removed in the future, XXX */
33 
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/kernel.h>
37 #include <sys/malloc.h>
38 #include <sys/module.h>
39 #include <sys/conf.h>
40 #include <sys/bus.h>
41 #include <sys/fbio.h>
42 
43 #include <machine/bus.h>
44 #include <machine/resource.h>
45 
46 #include <sys/rman.h>
47 
48 #include <vm/vm.h>
49 #include <vm/pmap.h>
50 
51 #include <machine/md_var.h>
52 #ifdef __i386__
53 #include <machine/pc/bios.h>
54 #endif
55 
56 #include <dev/fb/fbreg.h>
57 #include <dev/fb/vgareg.h>
58 
59 #include <isa/isareg.h>
60 #include <isa/isavar.h>
61 
62 #define VGA_SOFTC(unit)		\
63 	((vga_softc_t *)devclass_get_softc(isavga_devclass, unit))
64 
65 static devclass_t	isavga_devclass;
66 
67 #ifdef FB_INSTALL_CDEV
68 
69 static d_open_t		isavga_open;
70 static d_close_t	isavga_close;
71 static d_read_t		isavga_read;
72 static d_write_t	isavga_write;
73 static d_ioctl_t	isavga_ioctl;
74 static d_mmap_t		isavga_mmap;
75 
76 static struct cdevsw isavga_cdevsw = {
77 	.d_version =	D_VERSION,
78 	.d_flags =	D_NEEDGIANT,
79 	.d_open =	isavga_open,
80 	.d_close =	isavga_close,
81 	.d_read =	isavga_read,
82 	.d_write =	isavga_write,
83 	.d_ioctl =	isavga_ioctl,
84 	.d_mmap =	isavga_mmap,
85 	.d_name =	VGA_DRIVER_NAME,
86 };
87 
88 #endif /* FB_INSTALL_CDEV */
89 
90 static void
91 isavga_identify(driver_t *driver, device_t parent)
92 {
93 	BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, VGA_DRIVER_NAME, 0);
94 }
95 
96 static int
97 isavga_probe(device_t dev)
98 {
99 	video_adapter_t adp;
100 	int error;
101 
102 	/* No pnp support */
103 	if (isa_get_vendorid(dev))
104 		return (ENXIO);
105 
106 	device_set_desc(dev, "Generic ISA VGA");
107 	error = vga_probe_unit(device_get_unit(dev), &adp, device_get_flags(dev));
108 	if (error == 0) {
109 		bus_set_resource(dev, SYS_RES_IOPORT, 0,
110 				 adp.va_io_base, adp.va_io_size);
111 		bus_set_resource(dev, SYS_RES_MEMORY, 0,
112 				 adp.va_mem_base, adp.va_mem_size);
113 #if 0
114 		isa_set_port(dev, adp.va_io_base);
115 		isa_set_portsize(dev, adp.va_io_size);
116 		isa_set_maddr(dev, adp.va_mem_base);
117 		isa_set_msize(dev, adp.va_mem_size);
118 #endif
119 	}
120 	return error;
121 }
122 
123 static int
124 isavga_attach(device_t dev)
125 {
126 	vga_softc_t *sc;
127 	int unit;
128 	int rid;
129 	int error;
130 
131 	unit = device_get_unit(dev);
132 	sc = device_get_softc(dev);
133 
134 	rid = 0;
135 	bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
136 				  0, ~0, 0, RF_ACTIVE | RF_SHAREABLE);
137 	rid = 0;
138 	bus_alloc_resource(dev, SYS_RES_MEMORY, &rid,
139 				 0, ~0, 0, RF_ACTIVE | RF_SHAREABLE);
140 
141 	error = vga_attach_unit(unit, sc, device_get_flags(dev));
142 	if (error)
143 		return error;
144 
145 #ifdef FB_INSTALL_CDEV
146 	/* attach a virtual frame buffer device */
147 	error = fb_attach(VGA_MKMINOR(unit), sc->adp, &isavga_cdevsw);
148 	if (error)
149 		return error;
150 #endif /* FB_INSTALL_CDEV */
151 
152 	if (0 && bootverbose)
153 		vidd_diag(sc->adp, bootverbose);
154 
155 #if 0 /* experimental */
156 	device_add_child(dev, "fb", -1);
157 	bus_generic_attach(dev);
158 #endif
159 
160 	return 0;
161 }
162 
163 static int
164 isavga_suspend(device_t dev)
165 {
166 	vga_softc_t *sc;
167 	int err, nbytes;
168 
169 	sc = device_get_softc(dev);
170 	err = bus_generic_suspend(dev);
171 	if (err)
172 		return (err);
173 
174 	/* Save the video state across the suspend. */
175 	if (sc->state_buf != NULL) {
176 		free(sc->state_buf, M_TEMP);
177 		sc->state_buf = NULL;
178 	}
179 	nbytes = vidd_save_state(sc->adp, NULL, 0);
180 	if (nbytes <= 0)
181 		return (0);
182 	sc->state_buf = malloc(nbytes, M_TEMP, M_NOWAIT | M_ZERO);
183 	if (sc->state_buf == NULL)
184 		return (0);
185 	if (bootverbose)
186 		device_printf(dev, "saving %d bytes of video state\n", nbytes);
187 	if (vidd_save_state(sc->adp, sc->state_buf, nbytes) != 0) {
188 		device_printf(dev, "failed to save state (nbytes=%d)\n",
189 		    nbytes);
190 		free(sc->state_buf, M_TEMP);
191 		sc->state_buf = NULL;
192 	}
193 	return (0);
194 }
195 
196 static int
197 isavga_resume(device_t dev)
198 {
199 	vga_softc_t *sc;
200 
201 	sc = device_get_softc(dev);
202 	if (sc->state_buf != NULL) {
203 		if (vidd_load_state(sc->adp, sc->state_buf) != 0)
204 			device_printf(dev, "failed to reload state\n");
205 		free(sc->state_buf, M_TEMP);
206 		sc->state_buf = NULL;
207 	}
208 
209 	bus_generic_resume(dev);
210 	return 0;
211 }
212 
213 #ifdef FB_INSTALL_CDEV
214 
215 static int
216 isavga_open(struct cdev *dev, int flag, int mode, struct thread *td)
217 {
218 	return vga_open(dev, VGA_SOFTC(VGA_UNIT(dev)), flag, mode, td);
219 }
220 
221 static int
222 isavga_close(struct cdev *dev, int flag, int mode, struct thread *td)
223 {
224 	return vga_close(dev, VGA_SOFTC(VGA_UNIT(dev)), flag, mode, td);
225 }
226 
227 static int
228 isavga_read(struct cdev *dev, struct uio *uio, int flag)
229 {
230 	return vga_read(dev, VGA_SOFTC(VGA_UNIT(dev)), uio, flag);
231 }
232 
233 static int
234 isavga_write(struct cdev *dev, struct uio *uio, int flag)
235 {
236 	return vga_write(dev, VGA_SOFTC(VGA_UNIT(dev)), uio, flag);
237 }
238 
239 static int
240 isavga_ioctl(struct cdev *dev, u_long cmd, caddr_t arg, int flag, struct thread *td)
241 {
242 	return vga_ioctl(dev, VGA_SOFTC(VGA_UNIT(dev)), cmd, arg, flag, td);
243 }
244 
245 static int
246 isavga_mmap(struct cdev *dev, vm_offset_t offset, vm_paddr_t *paddr, int prot)
247 {
248 	return vga_mmap(dev, VGA_SOFTC(VGA_UNIT(dev)), offset, paddr, prot);
249 }
250 
251 #endif /* FB_INSTALL_CDEV */
252 
253 static device_method_t isavga_methods[] = {
254 	DEVMETHOD(device_identify,	isavga_identify),
255 	DEVMETHOD(device_probe,		isavga_probe),
256 	DEVMETHOD(device_attach,	isavga_attach),
257 	DEVMETHOD(device_suspend,	isavga_suspend),
258 	DEVMETHOD(device_resume,	isavga_resume),
259 
260 	DEVMETHOD(bus_print_child,	bus_generic_print_child),
261 	{ 0, 0 }
262 };
263 
264 static driver_t isavga_driver = {
265 	VGA_DRIVER_NAME,
266 	isavga_methods,
267 	sizeof(vga_softc_t),
268 };
269 
270 DRIVER_MODULE(vga, isa, isavga_driver, isavga_devclass, 0, 0);
271