Annotation of sys/dev/pci/vga_pci.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: vga_pci.c,v 1.26 2007/01/28 20:28:50 gwk Exp $ */
2: /* $NetBSD: vga_pci.c,v 1.3 1998/06/08 06:55:58 thorpej Exp $ */
3:
4: /*
5: * Copyright (c) 2001 Wasabi Systems, Inc.
6: * All rights reserved.
7: *
8: * Written by Frank van der Linden for Wasabi Systems, Inc.
9: *
10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
18: * 3. All advertising materials mentioning features or use of this software
19: * must display the following acknowledgement:
20: * This product includes software developed for the NetBSD Project by
21: * Wasabi Systems, Inc.
22: * 4. The name of Wasabi Systems, Inc. may not be used to endorse
23: * or promote products derived from this software without specific prior
24: * written permission.
25: *
26: * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
27: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
30: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36: * POSSIBILITY OF SUCH DAMAGE.
37: */
38: /*
39: * Copyright (c) 1995, 1996 Carnegie-Mellon University.
40: * All rights reserved.
41: *
42: * Author: Chris G. Demetriou
43: *
44: * Permission to use, copy, modify and distribute this software and
45: * its documentation is hereby granted, provided that both the copyright
46: * notice and this permission notice appear in all copies of the
47: * software, derivative works or modified versions, and any portions
48: * thereof, and that both notices appear in supporting documentation.
49: *
50: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
51: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
52: * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
53: *
54: * Carnegie Mellon requests users of this software to return to
55: *
56: * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
57: * School of Computer Science
58: * Carnegie Mellon University
59: * Pittsburgh PA 15213-3890
60: *
61: * any improvements or extensions that they make and grant Carnegie the
62: * rights to redistribute these changes.
63: */
64:
65: #include "vga.h"
66:
67: #include <sys/param.h>
68: #include <sys/systm.h>
69: #include <sys/kernel.h>
70: #include <sys/device.h>
71: #include <sys/malloc.h>
72: #include <sys/agpio.h>
73:
74: #include <uvm/uvm.h>
75:
76: #include <machine/bus.h>
77:
78: #include <dev/pci/pcireg.h>
79: #include <dev/pci/pcivar.h>
80: #include <dev/pci/pcidevs.h>
81:
82: #include <dev/ic/mc6845reg.h>
83: #include <dev/ic/pcdisplayvar.h>
84: #include <dev/ic/vgareg.h>
85: #include <dev/ic/vgavar.h>
86: #include <dev/pci/vga_pcivar.h>
87:
88:
89: #include <dev/wscons/wsconsio.h>
90: #include <dev/wscons/wsdisplayvar.h>
91:
92: #ifdef VESAFB
93: #include <dev/vesa/vesabiosvar.h>
94: #endif
95:
96: int vga_pci_match(struct device *, void *, void *);
97: void vga_pci_attach(struct device *, struct device *, void *);
98: paddr_t vga_pci_mmap(void* v, off_t off, int prot);
99:
100: #ifdef VESAFB
101: int vesafb_putcmap(struct vga_pci_softc *, struct wsdisplay_cmap *);
102: int vesafb_getcmap(struct vga_pci_softc *, struct wsdisplay_cmap *);
103: #endif
104:
105: struct cfattach vga_pci_ca = {
106: sizeof(struct vga_pci_softc), vga_pci_match, vga_pci_attach,
107: };
108:
109: int
110: vga_pci_match(struct device *parent, void *match, void *aux)
111: {
112: struct pci_attach_args *pa = aux;
113: int potential;
114:
115: potential = 0;
116:
117: /*
118: * If it's prehistoric/vga or display/vga, we might match.
119: * For the console device, this is jut a sanity check.
120: */
121: if (PCI_CLASS(pa->pa_class) == PCI_CLASS_PREHISTORIC &&
122: PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_PREHISTORIC_VGA)
123: potential = 1;
124: if (PCI_CLASS(pa->pa_class) == PCI_CLASS_DISPLAY &&
125: PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_DISPLAY_VGA)
126: potential = 1;
127:
128: if (!potential)
129: return (0);
130:
131: /* check whether it is disabled by firmware */
132: if ((pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG)
133: & (PCI_COMMAND_IO_ENABLE | PCI_COMMAND_MEM_ENABLE))
134: != (PCI_COMMAND_IO_ENABLE | PCI_COMMAND_MEM_ENABLE))
135: return (0);
136:
137: /* If it's the console, we have a winner! */
138: if (vga_is_console(pa->pa_iot, WSDISPLAY_TYPE_PCIVGA))
139: return (1);
140:
141: /*
142: * If we might match, make sure that the card actually looks OK.
143: */
144: if (!vga_common_probe(pa->pa_iot, pa->pa_memt))
145: return (0);
146:
147: return (1);
148: }
149:
150: void
151: vga_pci_attach(struct device *parent, struct device *self, void *aux)
152: {
153: struct pci_attach_args *pa = aux;
154: pcireg_t reg;
155: #ifdef VESAFB
156: struct vga_pci_softc *sc = (struct vga_pci_softc *)self;
157: #endif
158:
159: /*
160: * Enable bus master; X might need this for accelerated graphics.
161: */
162: reg = pci_conf_read(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
163: reg |= PCI_COMMAND_MASTER_ENABLE;
164: pci_conf_write(pa->pa_pc, pa->pa_tag, PCI_COMMAND_STATUS_REG, reg);
165:
166: #ifdef PCIAGP
167: agp_attach(parent, self, aux);
168: #endif
169: #ifdef VESAFB
170: if (vesabios_softc != NULL && vesabios_softc->sc_nmodes > 0) {
171: sc->sc_textmode = vesafb_get_mode(sc);
172: printf(", vesafb\n");
173: vga_extended_attach(self, pa->pa_iot, pa->pa_memt,
174: WSDISPLAY_TYPE_PCIVGA, vga_pci_mmap);
175: return;
176: }
177: #endif
178: printf("\n");
179: vga_common_attach(self, pa->pa_iot, pa->pa_memt,
180: WSDISPLAY_TYPE_PCIVGA);
181: }
182:
183: paddr_t
184: vga_pci_mmap(void *v, off_t off, int prot)
185: {
186: #ifdef VESAFB
187: struct vga_config *vc = (struct vga_config *)v;
188: struct vga_pci_softc *sc = (struct vga_pci_softc *)vc->vc_softc;
189:
190: if (sc->sc_mode == WSDISPLAYIO_MODE_DUMBFB) {
191: if (off < 0 || off > vesabios_softc->sc_size)
192: return (-1);
193: return atop(sc->sc_base + off);
194: }
195: #endif
196: #ifdef PCIAGP
197: return agp_mmap(v, off, prot);
198: #else
199: return -1;
200: #endif
201: }
202:
203: int
204: vga_pci_cnattach(bus_space_tag_t iot, bus_space_tag_t memt,
205: pci_chipset_tag_t pc, int bus, int device, int function)
206: {
207: return (vga_cnattach(iot, memt, WSDISPLAY_TYPE_PCIVGA, 0));
208: }
209:
210: int
211: vga_pci_ioctl(void *v, u_long cmd, caddr_t addr, int flag, struct proc *pb)
212: {
213: int error = 0;
214: #ifdef VESAFB
215: struct vga_config *vc = (struct vga_config *)v;
216: struct vga_pci_softc *sc = (struct vga_pci_softc *)vc->vc_softc;
217: struct wsdisplay_fbinfo *wdf;
218: struct wsdisplay_gfx_mode *gfxmode;
219: int mode;
220: #endif
221:
222: switch (cmd) {
223: #ifdef VESAFB
224: case WSDISPLAYIO_SMODE:
225: mode = *(u_int *)addr;
226: switch (mode) {
227: case WSDISPLAYIO_MODE_EMUL:
228: /* back to text mode */
229: vesafb_set_mode(sc, sc->sc_textmode);
230: sc->sc_mode = mode;
231: break;
232: case WSDISPLAYIO_MODE_DUMBFB:
233: if (sc->sc_gfxmode == -1)
234: return (-1);
235: vesafb_set_mode(sc, sc->sc_gfxmode);
236: sc->sc_mode = mode;
237: break;
238: default:
239: error = -1;
240: }
241: break;
242: case WSDISPLAYIO_GINFO:
243: if (sc->sc_gfxmode == -1)
244: return (-1);
245: wdf = (void *)addr;
246: wdf->height = sc->sc_height;
247: wdf->width = sc->sc_width;
248: wdf->depth = sc->sc_depth;
249: wdf->cmsize = 256;
250: break;
251:
252: case WSDISPLAYIO_LINEBYTES:
253: if (sc->sc_gfxmode == -1)
254: return (-1);
255: *(u_int *)addr = sc->sc_linebytes;
256: break;
257:
258: case WSDISPLAYIO_SVIDEO:
259: case WSDISPLAYIO_GVIDEO:
260: break;
261: case WSDISPLAYIO_GETCMAP:
262: if (sc->sc_depth == 8)
263: error = vesafb_getcmap(sc,
264: (struct wsdisplay_cmap *)addr);
265: break;
266:
267: case WSDISPLAYIO_PUTCMAP:
268: if (sc->sc_depth == 8)
269: error = vesafb_putcmap(sc,
270: (struct wsdisplay_cmap *)addr);
271: break;
272:
273: case WSDISPLAYIO_GETSUPPORTEDDEPTH:
274: *(int *)addr = vesafb_get_supported_depth(sc);
275: break;
276:
277: case WSDISPLAYIO_SETGFXMODE:
278: gfxmode = (struct wsdisplay_gfx_mode *)addr;
279: sc->sc_gfxmode = vesafb_find_mode(sc, gfxmode->width,
280: gfxmode->height, gfxmode->depth);
281: if (sc->sc_gfxmode == -1)
282: error = -1;
283: break;
284:
285: #endif
286: #ifdef PCIAGP
287: case AGPIOC_INFO:
288: case AGPIOC_ACQUIRE:
289: case AGPIOC_RELEASE:
290: case AGPIOC_SETUP:
291: case AGPIOC_ALLOCATE:
292: case AGPIOC_DEALLOCATE:
293: case AGPIOC_BIND:
294: case AGPIOC_UNBIND:
295: error = agp_ioctl(v, cmd, addr, flag, pb);
296: break;
297: #endif
298: default:
299: error = ENOTTY;
300: }
301:
302: return (error);
303: }
304:
305: #ifdef notyet
306: void
307: vga_pci_close(void *v)
308: {
309: #ifdef PCIAGP
310: agp_close(v);
311: #endif
312: }
313: #endif
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