Annotation of sys/dev/vesa/vesafb.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: vesafb.c,v 1.4 2007/02/18 19:19:02 gwk Exp $ */
2:
3: /*-
4: * Copyright (c) 2006 Jared D. McNeill <jmcneill@invisible.ca>
5: * All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: * 3. All advertising materials mentioning features or use of this software
16: * must display the following acknowledgement:
17: * This product includes software developed by the NetBSD
18: * Foundation, Inc. and its contributors.
19: * 4. Neither the name of The NetBSD Foundation nor the names of its
20: * contributors may be used to endorse or promote products derived
21: * from this software without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
24: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
25: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
26: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
27: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
30: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
31: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
33: * POSSIBILITY OF SUCH DAMAGE.
34: */
35: /*
36: * Copyright (c) 2006 Matthieu Herrb
37: *
38: * Permission to use, copy, modify, and distribute this software for any
39: * purpose with or without fee is hereby granted, provided that the above
40: * copyright notice and this permission notice appear in all copies.
41: *
42: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
43: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
44: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
45: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
46: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
47: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
48: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
49: */
50:
51: #include <sys/param.h>
52: #include <sys/systm.h>
53: #include <sys/kernel.h>
54: #include <sys/device.h>
55:
56: #include <machine/bus.h>
57:
58: #include <dev/pci/pcireg.h>
59: #include <dev/pci/pcivar.h>
60: #include <dev/pci/pcidevs.h>
61:
62: #include <dev/ic/mc6845reg.h>
63: #include <dev/ic/pcdisplayvar.h>
64: #include <dev/ic/vgareg.h>
65: #include <dev/ic/vgavar.h>
66: #include <dev/pci/vga_pcivar.h>
67:
68: #include <dev/vesa/vesabiosreg.h>
69: #include <dev/vesa/vesabiosvar.h>
70: #include <dev/vesa/vbe.h>
71:
72: #include <machine/frame.h>
73: #include <machine/kvm86.h>
74:
75: #include <dev/wscons/wsconsio.h>
76: #include <dev/wscons/wsdisplayvar.h>
77:
78: #include <uvm/uvm_extern.h>
79:
80:
81: void vesafb_set_mode(struct vga_pci_softc *, int);
82: int vesafb_get_mode(struct vga_pci_softc *);
83: void vesafb_get_mode_info(struct vga_pci_softc *, int, struct modeinfoblock *);
84: void vesafb_set_palette(struct vga_pci_softc *, int, struct paletteentry);
85: int vesafb_putcmap(struct vga_pci_softc *, struct wsdisplay_cmap *);
86: int vesafb_getcmap(struct vga_pci_softc *, struct wsdisplay_cmap *);
87: int vesafb_get_ddc_version(struct vga_pci_softc *);
88: int vesafb_get_ddc_info(struct vga_pci_softc *, struct edid *);
89:
90: int
91: vesafb_get_ddc_version(struct vga_pci_softc *sc)
92: {
93: struct trapframe tf;
94: int res;
95:
96: bzero(&tf, sizeof(struct trapframe));
97: tf.tf_eax = VBE_FUNC_DDC;
98:
99: res = kvm86_bioscall(BIOS_VIDEO_INTR, &tf);
100: if (res || VBECALL_SUPPORT(tf.tf_eax) != VBECALL_SUPPORTED)
101: return 0;
102:
103: return VBECALL_SUCESS(tf.tf_eax);
104: }
105:
106:
107: int
108: vesafb_get_ddc_info(struct vga_pci_softc *sc, struct edid *info)
109: {
110: struct trapframe tf;
111: unsigned char *buf;
112: int res;
113:
114: if ((buf = kvm86_bios_addpage(KVM86_CALL_TASKVA)) == NULL) {
115: printf("%s: kvm86_bios_addpage failed.\n",
116: sc->sc_dev.dv_xname);
117: return 1;
118: }
119:
120: bzero(&tf, sizeof(struct trapframe));
121: tf.tf_eax = VBE_FUNC_DDC;
122: tf.tf_ebx = VBE_DDC_GET;
123: tf.tf_vm86_es = 0;
124: tf.tf_edi = KVM86_CALL_TASKVA;
125:
126: res = kvm86_bioscall(BIOS_VIDEO_INTR, &tf);
127: if (res || VBECALL_SUPPORT(tf.tf_eax) != VBECALL_SUPPORTED) {
128: kvm86_bios_delpage(KVM86_CALL_TASKVA, buf);
129: return 1;
130: }
131:
132: memcpy(info, buf, sizeof(struct edid));
133: kvm86_bios_delpage(KVM86_CALL_TASKVA, buf);
134: return VBECALL_SUCESS(tf.tf_eax);
135: }
136:
137: int
138: vesafb_get_mode(struct vga_pci_softc *sc)
139: {
140: struct trapframe tf;
141: int res;
142:
143: bzero(&tf, sizeof(struct trapframe));
144: tf.tf_eax = VBE_FUNC_GETMODE;
145:
146: res = kvm86_bioscall(BIOS_VIDEO_INTR, &tf);
147: if (res || VBECALL_SUPPORT(tf.tf_eax) != VBECALL_SUPPORTED) {
148: printf("%s: vbecall: res=%d, ax=%x\n",
149: sc->sc_dev.dv_xname, res, tf.tf_eax);
150: }
151: return tf.tf_ebx & 0xffff;
152: }
153:
154: void
155: vesafb_get_mode_info(struct vga_pci_softc *sc, int mode,
156: struct modeinfoblock *mi)
157: {
158: struct trapframe tf;
159: unsigned char *buf;
160: int res;
161:
162: if ((buf = kvm86_bios_addpage(KVM86_CALL_TASKVA)) == NULL) {
163: printf("%s: kvm86_bios_addpage failed.\n",
164: sc->sc_dev.dv_xname);
165: return;
166: }
167: memset(&tf, 0, sizeof(struct trapframe));
168: tf.tf_eax = VBE_FUNC_MODEINFO;
169: tf.tf_ecx = mode;
170: tf.tf_vm86_es = 0;
171: tf.tf_edi = KVM86_CALL_TASKVA;
172:
173: res = kvm86_bioscall(BIOS_VIDEO_INTR, &tf);
174: if (res || VBECALL_SUPPORT(tf.tf_eax) != VBECALL_SUPPORTED) {
175: printf("%s: vbecall: res=%d, ax=%x\n",
176: sc->sc_dev.dv_xname, res, tf.tf_eax);
177: printf("%s: error getting info for mode %05x\n",
178: sc->sc_dev.dv_xname, mode);
179: kvm86_bios_delpage(KVM86_CALL_TASKVA, buf);
180: return;
181: }
182: memcpy(mi, buf, sizeof(struct modeinfoblock));
183: kvm86_bios_delpage(KVM86_CALL_TASKVA, buf);
184: }
185:
186: void
187: vesafb_set_palette(struct vga_pci_softc *sc, int reg, struct paletteentry pe)
188: {
189: struct trapframe tf;
190: int res;
191: char *buf;
192:
193: if ((buf = kvm86_bios_addpage(KVM86_CALL_TASKVA)) == NULL) {
194: printf("%s: kvm86_bios_addpage failed.\n",
195: sc->sc_dev.dv_xname);
196: return;
197: }
198: /*
199: * this function takes 8 bit per palette as input, but we're
200: * working in 6 bit mode here
201: */
202: pe.Red >>= 2;
203: pe.Green >>= 2;
204: pe.Blue >>= 2;
205:
206: memcpy(buf, &pe, sizeof(struct paletteentry));
207:
208: /* set palette */
209: memset(&tf, 0, sizeof(struct trapframe));
210: tf.tf_eax = VBE_FUNC_PALETTE;
211: tf.tf_ebx = 0x0600; /* 6 bit per primary, set format */
212: tf.tf_ecx = 1;
213: tf.tf_edx = reg;
214: tf.tf_vm86_es = 0;
215: tf.tf_edi = KVM86_CALL_TASKVA;
216:
217: res = kvm86_bioscall(BIOS_VIDEO_INTR, &tf);
218: if (res || VBECALL_SUPPORT(tf.tf_eax) != VBECALL_SUPPORTED)
219: printf("%s: vbecall: res=%d, ax=%x\n",
220: sc->sc_dev.dv_xname, res, tf.tf_eax);
221:
222: kvm86_bios_delpage(KVM86_CALL_TASKVA, buf);
223: return;
224: }
225:
226: void
227: vesafb_set_mode(struct vga_pci_softc *sc, int mode)
228: {
229: struct trapframe tf;
230: int res;
231:
232: bzero(&tf, sizeof(struct trapframe));
233: tf.tf_eax = VBE_FUNC_SETMODE;
234: tf.tf_ebx = mode | 0x4000; /* flat */
235:
236: res = kvm86_bioscall(BIOS_VIDEO_INTR, &tf);
237: if (res || VBECALL_SUPPORT(tf.tf_eax) != VBECALL_SUPPORTED) {
238: printf("%s: vbecall: res=%d, ax=%x\n",
239: sc->sc_dev.dv_xname, res, tf.tf_eax);
240: return;
241: }
242: }
243:
244: int
245: vesafb_find_mode(struct vga_pci_softc *sc, int width, int height, int bpp)
246: {
247: struct modeinfoblock mi;
248: int i;
249:
250: if (vesabios_softc == NULL || vesabios_softc->sc_nmodes == 0)
251: return -1;
252: #ifdef VESABIOSVERBOSE
253: printf("vesafb_find_mode %d %d %d\n", width, height, bpp);
254: #endif
255: /* Choose a graphics mode */
256: for (i = 0; i < vesabios_softc->sc_nmodes; i++) {
257: vesafb_get_mode_info(sc, vesabios_softc->sc_modes[i], &mi);
258: if (mi.XResolution == width &&
259: mi.YResolution == height &&
260: mi.BitsPerPixel == bpp) {
261: sc->sc_width = mi.XResolution;
262: sc->sc_height = mi.YResolution;
263: sc->sc_depth = mi.BitsPerPixel;
264: sc->sc_linebytes = mi.BytesPerScanLine;
265: sc->sc_base = mi.PhysBasePtr;
266: break;
267: }
268: }
269: if (i == vesabios_softc->sc_nmodes)
270: return -1;
271: else
272: return vesabios_softc->sc_modes[i];
273: }
274:
275: int
276: vesafb_putcmap(struct vga_pci_softc *sc, struct wsdisplay_cmap *cm)
277: {
278: struct paletteentry pe;
279: u_int idx, cnt;
280: u_char r[256], g[256], b[256];
281: u_char *rp, *gp, *bp;
282: int rv, i;
283:
284: idx = cm->index;
285: cnt = cm->count;
286:
287: if (idx >= 256 || cnt > 256 - idx)
288: return EINVAL;
289:
290: rv = copyin(cm->red, &r[idx], cnt);
291: if (rv)
292: return rv;
293: rv = copyin(cm->green, &g[idx], cnt);
294: if (rv)
295: return rv;
296: rv = copyin(cm->blue, &b[idx], cnt);
297: if (rv)
298: return rv;
299:
300: memcpy(&sc->sc_cmap_red[idx], &r[idx], cnt);
301: memcpy(&sc->sc_cmap_green[idx], &g[idx], cnt);
302: memcpy(&sc->sc_cmap_blue[idx], &b[idx], cnt);
303:
304: rp = &sc->sc_cmap_red[idx];
305: gp = &sc->sc_cmap_green[idx];
306: bp = &sc->sc_cmap_blue[idx];
307:
308: for (i = 0; i < cnt; i++) {
309: pe.Blue = *bp;
310: pe.Green = *gp;
311: pe.Red = *rp;
312: pe.Alignment = 0;
313: vesafb_set_palette(sc, idx, pe);
314: idx++;
315: rp++, gp++, bp++;
316: }
317:
318: return 0;
319: }
320:
321: int
322: vesafb_getcmap(struct vga_pci_softc *sc, struct wsdisplay_cmap *cm)
323: {
324: u_int idx, cnt;
325: int rv;
326:
327: idx = cm->index;
328: cnt = cm->count;
329:
330: if (idx >= 256 || cnt > 256 - idx)
331: return EINVAL;
332:
333: rv = copyout(&sc->sc_cmap_red[idx], cm->red, cnt);
334: if (rv)
335: return rv;
336: rv = copyout(&sc->sc_cmap_green[idx], cm->green, cnt);
337: if (rv)
338: return rv;
339: rv = copyout(&sc->sc_cmap_blue[idx], cm->blue, cnt);
340: if (rv)
341: return rv;
342:
343: return 0;
344: }
345:
346: static int
347: vesafb_getdepthflag(struct modeinfoblock *mi)
348: {
349: int bpp, depth;
350:
351: depth = mi->RedMaskSize + mi->GreenMaskSize + mi->BlueMaskSize;
352: bpp = mi->BitsPerPixel;
353: switch (depth) {
354: case 1:
355: return WSDISPLAYIO_DEPTH_1;
356: case 4:
357: return WSDISPLAYIO_DEPTH_4;
358: case 8:
359: return WSDISPLAYIO_DEPTH_8;
360: case 15:
361: return WSDISPLAYIO_DEPTH_15;
362: case 16:
363: return WSDISPLAYIO_DEPTH_16;
364: case 24:
365: switch (bpp) {
366: case 24:
367: return WSDISPLAYIO_DEPTH_24_24;
368: case 32:
369: return WSDISPLAYIO_DEPTH_24_32;
370: }
371: }
372: return 0;
373: }
374:
375:
376: int
377: vesafb_get_supported_depth(struct vga_pci_softc *sc)
378: {
379: int i, depths;
380: struct modeinfoblock mi;
381:
382: depths = 0;
383:
384: if (vesabios_softc == NULL || vesabios_softc->sc_nmodes == 0)
385: return 0;
386:
387: for (i = 0; i < vesabios_softc->sc_nmodes; i++) {
388: vesafb_get_mode_info(sc, vesabios_softc->sc_modes[i], &mi);
389: depths |= vesafb_getdepthflag(&mi);
390: }
391: return depths;
392: }
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