Annotation of src/sys/arch/macppc/dev/valkyriefb.c, Revision 1.8
1.8 ! riastrad 1: /* $NetBSD: valkyriefb.c,v 1.7 2021/08/07 16:18:58 thorpej Exp $ */
1.1 macallan 2:
3: /*
4: * Copyright (c) 2012 Michael Lorenz
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: *
16: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26: */
27:
28: /*
29: * A console driver for Apple's Valkyrie onboard video controller, found in
30: * for example the Performa 6360
31: * This should be easy enough to adapt to mac68k but I don't have the hardware
32: */
33:
34: #include <sys/cdefs.h>
1.8 ! riastrad 35: __KERNEL_RCSID(0, "$NetBSD: valkyriefb.c,v 1.7 2021/08/07 16:18:58 thorpej Exp $");
1.1 macallan 36:
37: #include <sys/param.h>
38: #include <sys/systm.h>
39: #include <sys/kernel.h>
40: #include <sys/device.h>
41:
42: #include <dev/ofw/openfirm.h>
43:
44: #include <machine/autoconf.h>
45:
1.5 macallan 46: #include <uvm/uvm_extern.h>
47: #include <powerpc/oea/pmap.h>
48:
1.1 macallan 49: #include <dev/wscons/wsdisplayvar.h>
50: #include <dev/wscons/wsconsio.h>
51: #include <dev/wsfont/wsfont.h>
52: #include <dev/rasops/rasops.h>
53: #include <dev/wscons/wsdisplay_vconsvar.h>
54:
55: #include <dev/videomode/videomode.h>
56:
57: #include <arch/macppc/dev/valkyriefbreg.h>
58: #include <arch/macppc/dev/videopllvar.h>
59:
60: #include "opt_wsemul.h"
61: #include "opt_valkyriefb.h"
62:
63: #include "videopll.h"
64: #if NVIDEOPLL < 1
65: #error "valkyriefb requires videopll at iic"
66: #endif
67:
68: struct valkyriefb_softc {
69: device_t sc_dev;
70: int sc_node;
71: uint8_t *sc_base;
1.2 macallan 72: uint8_t *sc_fbaddr;
1.1 macallan 73:
74: int sc_depth;
75: int sc_width, sc_height, sc_linebytes;
76: const struct videomode *sc_videomode;
77: uint8_t sc_modereg;
78:
79: int sc_mode;
80: uint32_t sc_bg;
81:
82: u_char sc_cmap_red[256];
83: u_char sc_cmap_green[256];
84: u_char sc_cmap_blue[256];
85:
86: struct vcons_data vd;
87: };
88:
89: struct valkyriefb_mode {
90: int width;
91: int height;
92: uint8_t mode;
93: };
94:
95: /*
96: * Translate screen resolutions to values for Valkyrie's mode register.
97: * These numbers seem to roughly correspond to MacOS video mode numbers
98: * there are many numbers that result in the same resolution which in MacOS
99: * only differ by the display refresh rate, which isn't set by Valkyrie at
100: * all, instead there's a PLL chip hooked to cuda's i2c bus. It doesn't seem
101: * to matter which number we use as long as the resolution is right and we
102: * program the PLL for the right pixel clock
103: */
104: static struct valkyriefb_mode modetab[] = {
105: { 640, 480, 6 },
106: { 800, 600, 12 },
107: { 832, 624, 9 },
108: { 1024, 768, 14},
109: };
110:
111: static struct vcons_screen valkyriefb_console_screen;
112:
113: static int valkyriefb_match(device_t, cfdata_t, void *);
114: static void valkyriefb_attach(device_t, device_t, void *);
115: static int valkyriefb_init(device_t);
116: static int valkyriefb_set_mode(struct valkyriefb_softc *,
117: const struct videomode *, int);
118:
119: CFATTACH_DECL_NEW(valkyriefb, sizeof(struct valkyriefb_softc),
120: valkyriefb_match, valkyriefb_attach, NULL, NULL);
121:
122: struct wsscreen_descr valkyriefb_defaultscreen = {
123: "default",
124: 0, 0,
125: NULL,
126: 8, 16,
127: WSSCREEN_WSCOLORS | WSSCREEN_HILIT,
128: NULL,
129: };
130:
131: const struct wsscreen_descr *_valkyriefb_scrlist[] = {
132: &valkyriefb_defaultscreen,
133: /* XXX other formats, graphics screen? */
134: };
135:
136: struct wsscreen_list valkyriefb_screenlist = {
1.3 macallan 137: sizeof(_valkyriefb_scrlist) / sizeof(struct wsscreen_descr *),
138: _valkyriefb_scrlist
1.1 macallan 139: };
140:
141: static int valkyriefb_ioctl(void *, void *, u_long, void *, int,
142: struct lwp *);
143: static paddr_t valkyriefb_mmap(void *, void *, off_t, int);
144:
145: static void valkyriefb_init_screen(void *, struct vcons_screen *, int,
146: long *);
147:
148:
149: struct wsdisplay_accessops valkyriefb_accessops = {
150: valkyriefb_ioctl,
151: valkyriefb_mmap,
152: NULL,
153: NULL,
154: NULL,
155: NULL, /* load_font */
156: NULL, /* polls */
157: NULL, /* scroll */
158: };
159:
160: static inline void
161: valkyriefb_write_reg(struct valkyriefb_softc *sc, int reg, uint8_t val)
162: {
163: *(sc->sc_base + VAL_REGS_OFFSET + reg) = val;
1.8 ! riastrad 164: __asm volatile("eieio; sync;" ::: "memory");
1.1 macallan 165: }
166:
1.4 macallan 167: #ifdef VALKYRIEFB_DEBUG
1.1 macallan 168: static inline uint8_t
169: valkyriefb_read_reg(struct valkyriefb_softc *sc, int reg)
170: {
171: return *(sc->sc_base + VAL_REGS_OFFSET + reg);
172: }
1.4 macallan 173: #endif
1.1 macallan 174:
175: static void
176: valkyriefb_write_cmap(struct valkyriefb_softc *sc,
177: int reg, uint8_t r, uint8_t g, uint8_t b)
178: {
179: *(sc->sc_base + VAL_CMAP_OFFSET + VAL_CMAP_ADDR) = reg;
1.8 ! riastrad 180: __asm volatile("eieio; sync;" ::: "memory");
1.1 macallan 181: *(sc->sc_base + VAL_CMAP_OFFSET + VAL_CMAP_LUT) = r;
1.8 ! riastrad 182: __asm volatile("eieio; sync;" ::: "memory");
1.1 macallan 183: *(sc->sc_base + VAL_CMAP_OFFSET + VAL_CMAP_LUT) = g;
1.8 ! riastrad 184: __asm volatile("eieio; sync;" ::: "memory");
1.1 macallan 185: *(sc->sc_base + VAL_CMAP_OFFSET + VAL_CMAP_LUT) = b;
1.8 ! riastrad 186: __asm volatile("eieio; sync;" ::: "memory");
1.1 macallan 187: }
188:
189: static int
190: valkyriefb_match(device_t parent, cfdata_t cf, void *aux)
191: {
192: struct confargs *ca = aux;
193:
194: if (strcmp(ca->ca_name, "valkyrie") != 0)
195: return 0;
196: return 1;
197: }
198:
199: static void
200: valkyriefb_attach(device_t parent, device_t self, void *aux)
201: {
202: struct valkyriefb_softc *sc = device_private(self);
203: struct confargs *ca = aux;
204:
205: sc->sc_dev = self;
206: sc->sc_node = ca->ca_node;
207:
208: aprint_normal(" address 0x%08x\n", ca->ca_reg[0]);
209: aprint_verbose_dev(sc->sc_dev, "waiting for videopll...\n");
210: sc->sc_base = (uint8_t *)ca->ca_reg[0];
211: #ifdef VALKYRIEFB_DEBUG
212: for (i = 0; i < 0x40; i += 8) {
1.3 macallan 213: aprint_error_dev(sc->sc_dev, "%02x: %02x\n", i,
214: valkyriefb_read_reg(sc, i));
1.1 macallan 215: }
216: #endif
217: config_finalize_register(sc->sc_dev, valkyriefb_init);
1.2 macallan 218: sc->sc_fbaddr = (uint8_t *)(sc->sc_base + 0x1000);
1.1 macallan 219: }
220:
221: static int
222: valkyriefb_init(device_t self)
223: {
224: struct valkyriefb_softc *sc = device_private(self);
225: const struct videomode *mode;
226: struct rasops_info *ri;
227: prop_dictionary_t dict;
228: struct wsemuldisplaydev_attach_args aa;
229: bool console = FALSE;
230: long defattr;
231:
232: mode = pick_mode_by_ref(800, 600, 60);
233: if (mode == NULL)
234: return 0;
235:
236: valkyriefb_set_mode(sc, mode, 8);
237:
1.3 macallan 238: vcons_init(&sc->vd, sc, &valkyriefb_defaultscreen,
239: &valkyriefb_accessops);
1.1 macallan 240: sc->vd.init_screen = valkyriefb_init_screen;
241:
242: dict = device_properties(sc->sc_dev);
243: prop_dictionary_get_bool(dict, "is_console", &console);
244:
245: ri = &valkyriefb_console_screen.scr_ri;
246: vcons_init_screen(&sc->vd, &valkyriefb_console_screen, 1, &defattr);
1.2 macallan 247: memset(sc->sc_base + 0x1000, ri->ri_devcmap[(defattr >> 16) & 0xf],
248: sc->sc_width * sc->sc_linebytes);
1.1 macallan 249: valkyriefb_console_screen.scr_flags |= VCONS_SCREEN_IS_STATIC;
250:
251: valkyriefb_defaultscreen.textops = &ri->ri_ops;
252: valkyriefb_defaultscreen.capabilities = ri->ri_caps;
253: valkyriefb_defaultscreen.nrows = ri->ri_rows;
254: valkyriefb_defaultscreen.ncols = ri->ri_cols;
255: if (console) {
1.3 macallan 256: wsdisplay_cnattach(&valkyriefb_defaultscreen, ri, 0, 0,
257: defattr);
1.2 macallan 258: vcons_replay_msgbuf(&valkyriefb_console_screen);
1.1 macallan 259: }
260: aa.console = console;
261: aa.scrdata = &valkyriefb_screenlist;
262: aa.accessops = &valkyriefb_accessops;
263: aa.accesscookie = &sc->vd;
264:
1.7 thorpej 265: config_found(self, &aa, wsemuldisplaydevprint, CFARGS_NONE);
1.1 macallan 266:
267: return 0;
268: }
269:
270: static int
271: valkyriefb_set_mode(struct valkyriefb_softc *sc,
272: const struct videomode *mode, int depth)
273: {
274: int i;
275: uint8_t modereg, tmp;
276:
277: /* first find the parameter for the mode register */
278: i = 0;
279: while ((i < __arraycount(modetab)) &&
280: (modetab[i].width != mode->hdisplay) &&
281: (modetab[i].height != mode->vdisplay))
282: i++;
1.3 macallan 283: if (i >= __arraycount(modetab)) {
284: aprint_error_dev(sc->sc_dev,
285: "Can't find a mode register value for %s\n", mode->name);
286: return EINVAL;
287: } else
1.1 macallan 288: modereg = modetab[i].mode;
289:
290: /* check if we have enough video memory */
291: if ((mode->hdisplay * mode->vdisplay * (depth >> 3)) > 0x100000) {
1.3 macallan 292: aprint_error_dev(sc->sc_dev, "Not enough video RAM for %s\n",
293: mode->name);
1.1 macallan 294: return EINVAL;
295: }
296:
297: /* reject depths other than 8 or 16 */
298: if ((depth != 8) && (depth != 16)) {
1.3 macallan 299: aprint_error_dev(sc->sc_dev,
300: "Depth [%d] is unsupported for %s\n", depth, mode->name);
1.1 macallan 301: return EINVAL;
302: }
303:
304: /* now start programming the chip */
305: valkyriefb_write_reg(sc, VAL_STATUS, 0);
306: delay(100);
307: valkyriefb_write_reg(sc, VAL_MODE, modereg | VAL_MODE_STOP);
308:
309: if (depth == 8) {
310: sc->sc_depth = 8;
311: valkyriefb_write_reg(sc, VAL_DEPTH, VAL_DEPTH_8);
312: for (i = 0; i < 256; i++) {
313: tmp = i & 0xe0;
314: /*
315: * replicate bits so 0xe0 maps to a red value of 0xff
316: * in order to make white look actually white
317: */
318: tmp |= (tmp >> 3) | (tmp >> 6);
319: sc->sc_cmap_red[i] = tmp;
320:
321: tmp = (i & 0x1c) << 3;
322: tmp |= (tmp >> 3) | (tmp >> 6);
323: sc->sc_cmap_green[i] = tmp;
324:
325: tmp = (i & 0x03) << 6;
326: tmp |= tmp >> 2;
327: tmp |= tmp >> 4;
328: sc->sc_cmap_blue[i] = tmp;
329:
330: valkyriefb_write_cmap(sc, i, sc->sc_cmap_red[i],
331: sc->sc_cmap_green[i], sc->sc_cmap_blue[i]);
332: }
333: } else if (depth == 16) {
334: sc->sc_depth = 16;
335: valkyriefb_write_reg(sc, VAL_DEPTH, VAL_DEPTH_16);
336: /* does the palette have any effect in 16bit? */
337: }
338:
339: videopll_set_freq(mode->dot_clock);
340: delay(100);
341: valkyriefb_write_reg(sc, VAL_MODE, modereg);
342:
343: sc->sc_modereg = modereg;
344: sc->sc_videomode = mode;
345: sc->sc_width = mode->hdisplay;
346: sc->sc_height = mode->vdisplay;
347: sc->sc_linebytes = mode->hdisplay * (sc->sc_depth >> 3);
348: aprint_normal_dev(sc->sc_dev, "switched to %d x %d in %d bit colour\n",
349: sc->sc_width, sc->sc_height, sc->sc_depth);
350: return 0;
351: }
352:
353: static int
354: valkyriefb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag,
355: struct lwp *l)
356: {
357: struct vcons_data *vd = v;
358: struct valkyriefb_softc *sc = vd->cookie;
359: struct wsdisplay_fbinfo *wdf;
360: struct vcons_screen *ms = vd->active;
361:
362: switch (cmd) {
363: case WSDISPLAYIO_GTYPE:
364: *(u_int *)data = WSDISPLAY_TYPE_VALKYRIE;
365: return 0;
366:
367: case WSDISPLAYIO_GINFO:
368: wdf = (void *)data;
369: wdf->height = ms->scr_ri.ri_height;
370: wdf->width = ms->scr_ri.ri_width;
371: wdf->depth = ms->scr_ri.ri_depth;
372: wdf->cmsize = 256;
373: return 0;
374: #if 0
375: case WSDISPLAYIO_GETCMAP:
376: return valkyriefb_getcmap(sc,
377: (struct wsdisplay_cmap *)data);
378:
379: case WSDISPLAYIO_PUTCMAP:
380: return valkyriefb_putcmap(sc,
381: (struct wsdisplay_cmap *)data);
382: #endif
383:
384: case WSDISPLAYIO_SMODE: {
385: int new_mode = *(int*)data;
386: if (new_mode != sc->sc_mode) {
387: sc->sc_mode = new_mode;
388: if (new_mode == WSDISPLAYIO_MODE_EMUL) {
389: vcons_redraw_screen(ms);
390: }
391: }
392: }
393: return 0;
394: }
395: return EPASSTHROUGH;
396: }
397:
398: static paddr_t
399: valkyriefb_mmap(void *v, void *vs, off_t offset, int prot)
400: {
401: struct vcons_data *vd = v;
402: struct valkyriefb_softc *sc = vd->cookie;
403: paddr_t pa;
404:
405: /* 'regular' framebuffer mmap()ing */
406: if (offset < 0x100000) {
407: pa = (paddr_t)(sc->sc_base + 0x1000 + offset);
1.5 macallan 408: pa |= POWERPC_MMAP_FLAG_PREFETCHABLE;
1.1 macallan 409: return pa;
410: }
411: return -1;
412: }
413:
414: static void
415: valkyriefb_init_screen(void *cookie, struct vcons_screen *scr,
416: int existing, long *defattr)
417: {
418: struct valkyriefb_softc *sc = cookie;
419: struct rasops_info *ri = &scr->scr_ri;
420:
1.2 macallan 421: memset(ri, 0, sizeof(struct rasops_info));
1.1 macallan 422: ri->ri_depth = sc->sc_depth;
423: ri->ri_width = sc->sc_width;
424: ri->ri_height = sc->sc_height;
425: ri->ri_stride = sc->sc_linebytes;
426: ri->ri_flg = RI_CENTER | RI_8BIT_IS_RGB | RI_ENABLE_ALPHA;
1.2 macallan 427: ri->ri_bits = sc->sc_fbaddr;
428:
1.1 macallan 429: scr->scr_flags |= VCONS_DONT_READ;
430:
431: rasops_init(ri, 0, 0);
432: ri->ri_caps = WSSCREEN_WSCOLORS;
433:
434: rasops_reconfig(ri, sc->sc_height / ri->ri_font->fontheight,
435: sc->sc_width / ri->ri_font->fontwidth);
436:
437: ri->ri_hw = scr;
438: }
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