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Merge tag 'block-5.11-2021-01-10' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / drivers / video / fbdev / sstfb.c
blobc05cdabeb11c2d543cfe40821d75b57e446b594a
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * linux/drivers/video/sstfb.c -- voodoo graphics frame buffer
4 *
5 * Copyright (c) 2000-2002 Ghozlane Toumi <gtoumi@laposte.net>
6 *
7 * Created 15 Jan 2000 by Ghozlane Toumi
8 *
9 * Contributions (and many thanks) :
10 *
11 * 03/2001 James Simmons <jsimmons@infradead.org>
12 * 04/2001 Paul Mundt <lethal@chaoticdreams.org>
13 * 05/2001 Urs Ganse <ursg@uni.de>
14 * (initial work on voodoo2 port, interlace)
15 * 09/2002 Helge Deller <deller@gmx.de>
16 * (enable driver on big-endian machines (hppa), ioctl fixes)
17 * 12/2002 Helge Deller <deller@gmx.de>
18 * (port driver to new frambuffer infrastructure)
19 * 01/2003 Helge Deller <deller@gmx.de>
20 * (initial work on fb hardware acceleration for voodoo2)
21 * 08/2006 Alan Cox <alan@redhat.com>
22 * Remove never finished and bogus 24/32bit support
23 * Clean up macro abuse
24 * Minor tidying for format.
25 * 12/2006 Helge Deller <deller@gmx.de>
26 * add /sys/class/graphics/fbX/vgapass sysfs-interface
27 * add module option "mode_option" to set initial screen mode
28 * use fbdev default videomode database
29 * remove debug functions from ioctl
30 */
31
32 /*
33 * The voodoo1 has the following memory mapped address space:
34 * 0x000000 - 0x3fffff : registers (4MB)
35 * 0x400000 - 0x7fffff : linear frame buffer (4MB)
36 * 0x800000 - 0xffffff : texture memory (8MB)
37 */
38
39 /*
40 * misc notes, TODOs, toASKs, and deep thoughts
41
42 -TODO: at one time or another test that the mode is acceptable by the monitor
43 -ASK: Can I choose different ordering for the color bitfields (rgba argb ...)
44 which one should i use ? is there any preferred one ? It seems ARGB is
45 the one ...
46 -TODO: in set_var check the validity of timings (hsync vsync)...
47 -TODO: check and recheck the use of sst_wait_idle : we don't flush the fifo via
48 a nop command. so it's ok as long as the commands we pass don't go
49 through the fifo. warning: issuing a nop command seems to need pci_fifo
50 -FIXME: in case of failure in the init sequence, be sure we return to a safe
51 state.
52 - FIXME: Use accelerator for 2D scroll
53 -FIXME: 4MB boards have banked memory (FbiInit2 bits 1 & 20)
54 */
55
56 /*
57 * debug info
58 * SST_DEBUG : enable debugging
59 * SST_DEBUG_REG : debug registers
60 * 0 : no debug
61 * 1 : dac calls, [un]set_bits, FbiInit
62 * 2 : insane debug level (log every register read/write)
63 * SST_DEBUG_FUNC : functions
64 * 0 : no debug
65 * 1 : function call / debug ioctl
66 * 2 : variables
67 * 3 : flood . you don't want to do that. trust me.
68 * SST_DEBUG_VAR : debug display/var structs
69 * 0 : no debug
70 * 1 : dumps display, fb_var
71 *
72 * sstfb specific ioctls:
73 * toggle vga (0x46db) : toggle vga_pass_through
74 */
75
76 #undef SST_DEBUG
77
78
79 /*
80 * Includes
81 */
82
83 #include <linux/string.h>
84 #include <linux/kernel.h>
85 #include <linux/module.h>
86 #include <linux/fb.h>
87 #include <linux/pci.h>
88 #include <linux/delay.h>
89 #include <linux/init.h>
90 #include <asm/io.h>
91 #include <linux/uaccess.h>
92 #include <video/sstfb.h>
93
94
95 /* initialized by setup */
96
97 static bool vgapass; /* enable VGA passthrough cable */
98 static int mem; /* mem size in MB, 0 = autodetect */
99 static bool clipping = 1; /* use clipping (slower, safer) */
100 static int gfxclk; /* force FBI freq in Mhz . Dangerous */
101 static bool slowpci; /* slow PCI settings */
102
103 /*
104 Possible default video modes: 800x600@60, 640x480@75, 1024x768@76, 640x480@60
105 */
106 #define DEFAULT_VIDEO_MODE "640x480@60"
107
108 static char *mode_option = DEFAULT_VIDEO_MODE;
109
110 enum {
111 ID_VOODOO1 = 0,
112 ID_VOODOO2 = 1,
113 };
114
115 #define IS_VOODOO2(par) ((par)->type == ID_VOODOO2)
116
117 static struct sst_spec voodoo_spec[] = {
118 { .name = "Voodoo Graphics", .default_gfx_clock = 50000, .max_gfxclk = 60 },
119 { .name = "Voodoo2", .default_gfx_clock = 75000, .max_gfxclk = 85 },
120 };
121
122
123 /*
124 * debug functions
125 */
126
127 #if (SST_DEBUG_REG > 0)
128 static void sst_dbg_print_read_reg(u32 reg, u32 val) {
129 const char *regname;
130 switch (reg) {
131 case FBIINIT0: regname = "FbiInit0"; break;
132 case FBIINIT1: regname = "FbiInit1"; break;
133 case FBIINIT2: regname = "FbiInit2"; break;
134 case FBIINIT3: regname = "FbiInit3"; break;
135 case FBIINIT4: regname = "FbiInit4"; break;
136 case FBIINIT5: regname = "FbiInit5"; break;
137 case FBIINIT6: regname = "FbiInit6"; break;
138 default: regname = NULL; break;
139 }
140 if (regname == NULL)
141 r_ddprintk("sst_read(%#x): %#x\n", reg, val);
142 else
143 r_dprintk(" sst_read(%s): %#x\n", regname, val);
144 }
145
146 static void sst_dbg_print_write_reg(u32 reg, u32 val) {
147 const char *regname;
148 switch (reg) {
149 case FBIINIT0: regname = "FbiInit0"; break;
150 case FBIINIT1: regname = "FbiInit1"; break;
151 case FBIINIT2: regname = "FbiInit2"; break;
152 case FBIINIT3: regname = "FbiInit3"; break;
153 case FBIINIT4: regname = "FbiInit4"; break;
154 case FBIINIT5: regname = "FbiInit5"; break;
155 case FBIINIT6: regname = "FbiInit6"; break;
156 default: regname = NULL; break;
157 }
158 if (regname == NULL)
159 r_ddprintk("sst_write(%#x, %#x)\n", reg, val);
160 else
161 r_dprintk(" sst_write(%s, %#x)\n", regname, val);
162 }
163 #else /* (SST_DEBUG_REG > 0) */
164 # define sst_dbg_print_read_reg(reg, val) do {} while(0)
165 # define sst_dbg_print_write_reg(reg, val) do {} while(0)
166 #endif /* (SST_DEBUG_REG > 0) */
167
168 /*
169 * hardware access functions
170 */
171
172 /* register access */
173 #define sst_read(reg) __sst_read(par->mmio_vbase, reg)
174 #define sst_write(reg,val) __sst_write(par->mmio_vbase, reg, val)
175 #define sst_set_bits(reg,val) __sst_set_bits(par->mmio_vbase, reg, val)
176 #define sst_unset_bits(reg,val) __sst_unset_bits(par->mmio_vbase, reg, val)
177 #define sst_dac_read(reg) __sst_dac_read(par->mmio_vbase, reg)
178 #define sst_dac_write(reg,val) __sst_dac_write(par->mmio_vbase, reg, val)
179 #define dac_i_read(reg) __dac_i_read(par->mmio_vbase, reg)
180 #define dac_i_write(reg,val) __dac_i_write(par->mmio_vbase, reg, val)
181
182 static inline u32 __sst_read(u8 __iomem *vbase, u32 reg)
183 {
184 u32 ret = readl(vbase + reg);
185 sst_dbg_print_read_reg(reg, ret);
186 return ret;
187 }
188
189 static inline void __sst_write(u8 __iomem *vbase, u32 reg, u32 val)
190 {
191 sst_dbg_print_write_reg(reg, val);
192 writel(val, vbase + reg);
193 }
194
195 static inline void __sst_set_bits(u8 __iomem *vbase, u32 reg, u32 val)
196 {
197 r_dprintk("sst_set_bits(%#x, %#x)\n", reg, val);
198 __sst_write(vbase, reg, __sst_read(vbase, reg) | val);
199 }
200
201 static inline void __sst_unset_bits(u8 __iomem *vbase, u32 reg, u32 val)
202 {
203 r_dprintk("sst_unset_bits(%#x, %#x)\n", reg, val);
204 __sst_write(vbase, reg, __sst_read(vbase, reg) & ~val);
205 }
206
207 /*
208 * wait for the fbi chip. ASK: what happens if the fbi is stuck ?
209 *
210 * the FBI is supposed to be ready if we receive 5 time
211 * in a row a "idle" answer to our requests
212 */
213
214 #define sst_wait_idle() __sst_wait_idle(par->mmio_vbase)
215
216 static int __sst_wait_idle(u8 __iomem *vbase)
217 {
218 int count = 0;
219
220 /* if (doFBINOP) __sst_write(vbase, NOPCMD, 0); */
221
222 while(1) {
223 if (__sst_read(vbase, STATUS) & STATUS_FBI_BUSY) {
224 f_dddprintk("status: busy\n");
225 /* FIXME basically, this is a busy wait. maybe not that good. oh well;
226 * this is a small loop after all.
227 * Or maybe we should use mdelay() or udelay() here instead ? */
228 count = 0;
229 } else {
230 count++;
231 f_dddprintk("status: idle(%d)\n", count);
232 }
233 if (count >= 5) return 1;
234 /* XXX do something to avoid hanging the machine if the voodoo is out */
235 }
236 }
237
238
239 /* dac access */
240 /* dac_read should be remaped to FbiInit2 (via the pci reg init_enable) */
241 static u8 __sst_dac_read(u8 __iomem *vbase, u8 reg)
242 {
243 u8 ret;
244
245 reg &= 0x07;
246 __sst_write(vbase, DAC_DATA, ((u32)reg << 8) | DAC_READ_CMD );
247 __sst_wait_idle(vbase);
248 /* udelay(10); */
249 ret = __sst_read(vbase, DAC_READ) & 0xff;
250 r_dprintk("sst_dac_read(%#x): %#x\n", reg, ret);
251
252 return ret;
253 }
254
255 static void __sst_dac_write(u8 __iomem *vbase, u8 reg, u8 val)
256 {
257 r_dprintk("sst_dac_write(%#x, %#x)\n", reg, val);
258 reg &= 0x07;
259 __sst_write(vbase, DAC_DATA,(((u32)reg << 8)) | (u32)val);
260 __sst_wait_idle(vbase);
261 }
262
263 /* indexed access to ti/att dacs */
264 static u32 __dac_i_read(u8 __iomem *vbase, u8 reg)
265 {
266 u32 ret;
267
268 __sst_dac_write(vbase, DACREG_ADDR_I, reg);
269 ret = __sst_dac_read(vbase, DACREG_DATA_I);
270 r_dprintk("sst_dac_read_i(%#x): %#x\n", reg, ret);
271 return ret;
272 }
273 static void __dac_i_write(u8 __iomem *vbase, u8 reg,u8 val)
274 {
275 r_dprintk("sst_dac_write_i(%#x, %#x)\n", reg, val);
276 __sst_dac_write(vbase, DACREG_ADDR_I, reg);
277 __sst_dac_write(vbase, DACREG_DATA_I, val);
278 }
279
280 /* compute the m,n,p , returns the real freq
281 * (ics datasheet : N <-> N1 , P <-> N2)
282 *
283 * Fout= Fref * (M+2)/( 2^P * (N+2))
284 * we try to get close to the asked freq
285 * with P as high, and M as low as possible
286 * range:
287 * ti/att : 0 <= M <= 255; 0 <= P <= 3; 0<= N <= 63
288 * ics : 1 <= M <= 127; 0 <= P <= 3; 1<= N <= 31
289 * we'll use the lowest limitation, should be precise enouth
290 */
291 static int sst_calc_pll(const int freq, int *freq_out, struct pll_timing *t)
292 {
293 int m, m2, n, p, best_err, fout;
294 int best_n = -1;
295 int best_m = -1;
296
297 best_err = freq;
298 p = 3;
299 /* f * 2^P = vco should be less than VCOmax ~ 250 MHz for ics*/
300 while (((1 << p) * freq > VCO_MAX) && (p >= 0))
301 p--;
302 if (p == -1)
303 return -EINVAL;
304 for (n = 1; n < 32; n++) {
305 /* calc 2 * m so we can round it later*/
306 m2 = (2 * freq * (1 << p) * (n + 2) ) / DAC_FREF - 4 ;
307
308 m = (m2 % 2 ) ? m2/2+1 : m2/2 ;
309 if (m >= 128)
310 break;
311 fout = (DAC_FREF * (m + 2)) / ((1 << p) * (n + 2));
312 if ((abs(fout - freq) < best_err) && (m > 0)) {
313 best_n = n;
314 best_m = m;
315 best_err = abs(fout - freq);
316 /* we get the lowest m , allowing 0.5% error in freq*/
317 if (200*best_err < freq) break;
318 }
319 }
320 if (best_n == -1) /* unlikely, but who knows ? */
321 return -EINVAL;
322 t->p = p;
323 t->n = best_n;
324 t->m = best_m;
325 *freq_out = (DAC_FREF * (t->m + 2)) / ((1 << t->p) * (t->n + 2));
326 f_ddprintk ("m: %d, n: %d, p: %d, F: %dKhz\n",
327 t->m, t->n, t->p, *freq_out);
328 return 0;
329 }
330
331 /*
332 * clear lfb screen
333 */
334 static void sstfb_clear_screen(struct fb_info *info)
335 {
336 /* clear screen */
337 fb_memset(info->screen_base, 0, info->fix.smem_len);
338 }
339
340
341 /**
342 * sstfb_check_var - Optional function. Validates a var passed in.
343 * @var: frame buffer variable screen structure
344 * @info: frame buffer structure that represents a single frame buffer
345 *
346 * Limit to the abilities of a single chip as SLI is not supported
347 * by this driver.
348 */
349
350 static int sstfb_check_var(struct fb_var_screeninfo *var,
351 struct fb_info *info)
352 {
353 struct sstfb_par *par = info->par;
354 int hSyncOff = var->xres + var->right_margin + var->left_margin;
355 int vSyncOff = var->yres + var->lower_margin + var->upper_margin;
356 int vBackPorch = var->left_margin, yDim = var->yres;
357 int vSyncOn = var->vsync_len;
358 int tiles_in_X, real_length;
359 unsigned int freq;
360
361 if (sst_calc_pll(PICOS2KHZ(var->pixclock), &freq, &par->pll)) {
362 printk(KERN_ERR "sstfb: Pixclock at %ld KHZ out of range\n",
363 PICOS2KHZ(var->pixclock));
364 return -EINVAL;
365 }
366 var->pixclock = KHZ2PICOS(freq);
367
368 if (var->vmode & FB_VMODE_INTERLACED)
369 vBackPorch += (vBackPorch % 2);
370 if (var->vmode & FB_VMODE_DOUBLE) {
371 vBackPorch <<= 1;
372 yDim <<=1;
373 vSyncOn <<=1;
374 vSyncOff <<=1;
375 }
376
377 switch (var->bits_per_pixel) {
378 case 0 ... 16 :
379 var->bits_per_pixel = 16;
380 break;
381 default :
382 printk(KERN_ERR "sstfb: Unsupported bpp %d\n", var->bits_per_pixel);
383 return -EINVAL;
384 }
385
386 /* validity tests */
387 if (var->xres <= 1 || yDim <= 0 || var->hsync_len <= 1 ||
388 hSyncOff <= 1 || var->left_margin <= 2 || vSyncOn <= 0 ||
389 vSyncOff <= 0 || vBackPorch <= 0) {
390 return -EINVAL;
391 }
392
393 if (IS_VOODOO2(par)) {
394 /* Voodoo 2 limits */
395 tiles_in_X = (var->xres + 63 ) / 64 * 2;
396
397 if (var->xres > POW2(11) || yDim >= POW2(11)) {
398 printk(KERN_ERR "sstfb: Unsupported resolution %dx%d\n",
399 var->xres, var->yres);
400 return -EINVAL;
401 }
402
403 if (var->hsync_len > POW2(9) || hSyncOff > POW2(11) ||
404 var->left_margin - 2 >= POW2(9) || vSyncOn >= POW2(13) ||
405 vSyncOff >= POW2(13) || vBackPorch >= POW2(9) ||
406 tiles_in_X >= POW2(6) || tiles_in_X <= 0) {
407 printk(KERN_ERR "sstfb: Unsupported timings\n");
408 return -EINVAL;
409 }
410 } else {
411 /* Voodoo limits */
412 tiles_in_X = (var->xres + 63 ) / 64;
413
414 if (var->vmode) {
415 printk(KERN_ERR "sstfb: Interlace/doublescan not supported %#x\n",
416 var->vmode);
417 return -EINVAL;
418 }
419 if (var->xres > POW2(10) || var->yres >= POW2(10)) {
420 printk(KERN_ERR "sstfb: Unsupported resolution %dx%d\n",
421 var->xres, var->yres);
422 return -EINVAL;
423 }
424 if (var->hsync_len > POW2(8) || hSyncOff - 1 > POW2(10) ||
425 var->left_margin - 2 >= POW2(8) || vSyncOn >= POW2(12) ||
426 vSyncOff >= POW2(12) || vBackPorch >= POW2(8) ||
427 tiles_in_X >= POW2(4) || tiles_in_X <= 0) {
428 printk(KERN_ERR "sstfb: Unsupported timings\n");
429 return -EINVAL;
430 }
431 }
432
433 /* it seems that the fbi uses tiles of 64x16 pixels to "map" the mem */
434 /* FIXME: i don't like this... looks wrong */
435 real_length = tiles_in_X * (IS_VOODOO2(par) ? 32 : 64 )
436 * ((var->bits_per_pixel == 16) ? 2 : 4);
437
438 if (real_length * yDim > info->fix.smem_len) {
439 printk(KERN_ERR "sstfb: Not enough video memory\n");
440 return -ENOMEM;
441 }
442
443 var->sync &= (FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT);
444 var->vmode &= (FB_VMODE_INTERLACED | FB_VMODE_DOUBLE);
445 var->xoffset = 0;
446 var->yoffset = 0;
447 var->height = -1;
448 var->width = -1;
449
450 /*
451 * correct the color bit fields
452 */
453 /* var->{red|green|blue}.msb_right = 0; */
454
455 switch (var->bits_per_pixel) {
456 case 16: /* RGB 565 LfbMode 0 */
457 var->red.length = 5;
458 var->green.length = 6;
459 var->blue.length = 5;
460 var->transp.length = 0;
461
462 var->red.offset = 11;
463 var->green.offset = 5;
464 var->blue.offset = 0;
465 var->transp.offset = 0;
466 break;
467 default:
468 return -EINVAL;
469 }
470 return 0;
471 }
472
473 /**
474 * sstfb_set_par - Optional function. Alters the hardware state.
475 * @info: frame buffer structure that represents a single frame buffer
476 */
477 static int sstfb_set_par(struct fb_info *info)
478 {
479 struct sstfb_par *par = info->par;
480 u32 lfbmode, fbiinit1, fbiinit2, fbiinit3, fbiinit5, fbiinit6=0;
481 struct pci_dev *sst_dev = par->dev;
482 unsigned int freq;
483 int ntiles;
484
485 par->hSyncOff = info->var.xres + info->var.right_margin + info->var.left_margin;
486
487 par->yDim = info->var.yres;
488 par->vSyncOn = info->var.vsync_len;
489 par->vSyncOff = info->var.yres + info->var.lower_margin + info->var.upper_margin;
490 par->vBackPorch = info->var.upper_margin;
491
492 /* We need par->pll */
493 sst_calc_pll(PICOS2KHZ(info->var.pixclock), &freq, &par->pll);
494
495 if (info->var.vmode & FB_VMODE_INTERLACED)
496 par->vBackPorch += (par->vBackPorch % 2);
497 if (info->var.vmode & FB_VMODE_DOUBLE) {
498 par->vBackPorch <<= 1;
499 par->yDim <<=1;
500 par->vSyncOn <<=1;
501 par->vSyncOff <<=1;
502 }
503
504 if (IS_VOODOO2(par)) {
505 /* voodoo2 has 32 pixel wide tiles , BUT strange things
506 happen with odd number of tiles */
507 par->tiles_in_X = (info->var.xres + 63 ) / 64 * 2;
508 } else {
509 /* voodoo1 has 64 pixels wide tiles. */
510 par->tiles_in_X = (info->var.xres + 63 ) / 64;
511 }
512
513 f_ddprintk("hsync_len hSyncOff vsync_len vSyncOff\n");
514 f_ddprintk("%-7d %-8d %-7d %-8d\n",
515 info->var.hsync_len, par->hSyncOff,
516 par->vSyncOn, par->vSyncOff);
517 f_ddprintk("left_margin upper_margin xres yres Freq\n");
518 f_ddprintk("%-10d %-10d %-4d %-4d %-8ld\n",
519 info->var.left_margin, info->var.upper_margin,
520 info->var.xres, info->var.yres, PICOS2KHZ(info->var.pixclock));
521
522 sst_write(NOPCMD, 0);
523 sst_wait_idle();
524 pci_write_config_dword(sst_dev, PCI_INIT_ENABLE, PCI_EN_INIT_WR);
525 sst_set_bits(FBIINIT1, VIDEO_RESET);
526 sst_set_bits(FBIINIT0, FBI_RESET | FIFO_RESET);
527 sst_unset_bits(FBIINIT2, EN_DRAM_REFRESH);
528 sst_wait_idle();
529
530 /*sst_unset_bits (FBIINIT0, FBI_RESET); / reenable FBI ? */
531
532 sst_write(BACKPORCH, par->vBackPorch << 16 | (info->var.left_margin - 2));
533 sst_write(VIDEODIMENSIONS, par->yDim << 16 | (info->var.xres - 1));
534 sst_write(HSYNC, (par->hSyncOff - 1) << 16 | (info->var.hsync_len - 1));
535 sst_write(VSYNC, par->vSyncOff << 16 | par->vSyncOn);
536
537 fbiinit2 = sst_read(FBIINIT2);
538 fbiinit3 = sst_read(FBIINIT3);
539
540 /* everything is reset. we enable fbiinit2/3 remap : dac access ok */
541 pci_write_config_dword(sst_dev, PCI_INIT_ENABLE,
542 PCI_EN_INIT_WR | PCI_REMAP_DAC );
543
544 par->dac_sw.set_vidmod(info, info->var.bits_per_pixel);
545
546 /* set video clock */
547 par->dac_sw.set_pll(info, &par->pll, VID_CLOCK);
548
549 /* disable fbiinit2/3 remap */
550 pci_write_config_dword(sst_dev, PCI_INIT_ENABLE,
551 PCI_EN_INIT_WR);
552
553 /* restore fbiinit2/3 */
554 sst_write(FBIINIT2,fbiinit2);
555 sst_write(FBIINIT3,fbiinit3);
556
557 fbiinit1 = (sst_read(FBIINIT1) & VIDEO_MASK)
558 | EN_DATA_OE
559 | EN_BLANK_OE
560 | EN_HVSYNC_OE
561 | EN_DCLK_OE
562 /* | (15 << TILES_IN_X_SHIFT) */
563 | SEL_INPUT_VCLK_2X
564 /* | (2 << VCLK_2X_SEL_DEL_SHIFT)
565 | (2 << VCLK_DEL_SHIFT) */;
566 /* try with vclk_in_delay =0 (bits 29:30) , vclk_out_delay =0 (bits(27:28)
567 in (near) future set them accordingly to revision + resolution (cf glide)
568 first understand what it stands for :)
569 FIXME: there are some artefacts... check for the vclk_in_delay
570 lets try with 6ns delay in both vclk_out & in...
571 doh... they're still there :\
572 */
573
574 ntiles = par->tiles_in_X;
575 if (IS_VOODOO2(par)) {
576 fbiinit1 |= ((ntiles & 0x20) >> 5) << TILES_IN_X_MSB_SHIFT
577 | ((ntiles & 0x1e) >> 1) << TILES_IN_X_SHIFT;
578 /* as the only value of importance for us in fbiinit6 is tiles in X (lsb),
579 and as reading fbinit 6 will return crap (see FBIINIT6_DEFAULT) we just
580 write our value. BTW due to the dac unable to read odd number of tiles, this
581 field is always null ... */
582 fbiinit6 = (ntiles & 0x1) << TILES_IN_X_LSB_SHIFT;
583 }
584 else
585 fbiinit1 |= ntiles << TILES_IN_X_SHIFT;
586
587 switch (info->var.bits_per_pixel) {
588 case 16:
589 fbiinit1 |= SEL_SOURCE_VCLK_2X_SEL;
590 break;
591 default:
592 return -EINVAL;
593 }
594 sst_write(FBIINIT1, fbiinit1);
595 if (IS_VOODOO2(par)) {
596 sst_write(FBIINIT6, fbiinit6);
597 fbiinit5=sst_read(FBIINIT5) & FBIINIT5_MASK ;
598 if (info->var.vmode & FB_VMODE_INTERLACED)
599 fbiinit5 |= INTERLACE;
600 if (info->var.vmode & FB_VMODE_DOUBLE)
601 fbiinit5 |= VDOUBLESCAN;
602 if (info->var.sync & FB_SYNC_HOR_HIGH_ACT)
603 fbiinit5 |= HSYNC_HIGH;
604 if (info->var.sync & FB_SYNC_VERT_HIGH_ACT)
605 fbiinit5 |= VSYNC_HIGH;
606 sst_write(FBIINIT5, fbiinit5);
607 }
608 sst_wait_idle();
609 sst_unset_bits(FBIINIT1, VIDEO_RESET);
610 sst_unset_bits(FBIINIT0, FBI_RESET | FIFO_RESET);
611 sst_set_bits(FBIINIT2, EN_DRAM_REFRESH);
612 /* disables fbiinit writes */
613 pci_write_config_dword(sst_dev, PCI_INIT_ENABLE, PCI_EN_FIFO_WR);
614
615 /* set lfbmode : set mode + front buffer for reads/writes
616 + disable pipeline */
617 switch (info->var.bits_per_pixel) {
618 case 16:
619 lfbmode = LFB_565;
620 break;
621 default:
622 return -EINVAL;
623 }
624
625 #if defined(__BIG_ENDIAN)
626 /* Enable byte-swizzle functionality in hardware.
627 * With this enabled, all our read- and write-accesses to
628 * the voodoo framebuffer can be done in native format, and
629 * the hardware will automatically convert it to little-endian.
630 * - tested on HP-PARISC, Helge Deller <deller@gmx.de> */
631 lfbmode |= ( LFB_WORD_SWIZZLE_WR | LFB_BYTE_SWIZZLE_WR |
632 LFB_WORD_SWIZZLE_RD | LFB_BYTE_SWIZZLE_RD );
633 #endif
634
635 if (clipping) {
636 sst_write(LFBMODE, lfbmode | EN_PXL_PIPELINE);
637 /*
638 * Set "clipping" dimensions. If clipping is disabled and
639 * writes to offscreen areas of the framebuffer are performed,
640 * the "behaviour is undefined" (_very_ undefined) - Urs
641 */
642 /* btw, it requires enabling pixel pipeline in LFBMODE .
643 off screen read/writes will just wrap and read/print pixels
644 on screen. Ugly but not that dangerous */
645 f_ddprintk("setting clipping dimensions 0..%d, 0..%d\n",
646 info->var.xres - 1, par->yDim - 1);
647
648 sst_write(CLIP_LEFT_RIGHT, info->var.xres);
649 sst_write(CLIP_LOWY_HIGHY, par->yDim);
650 sst_set_bits(FBZMODE, EN_CLIPPING | EN_RGB_WRITE);
651 } else {
652 /* no clipping : direct access, no pipeline */
653 sst_write(LFBMODE, lfbmode);
654 }
655 return 0;
656 }
657
658 /**
659 * sstfb_setcolreg - Optional function. Sets a color register.
660 * @regno: hardware colormap register
661 * @red: frame buffer colormap structure
662 * @green: The green value which can be up to 16 bits wide
663 * @blue: The blue value which can be up to 16 bits wide.
664 * @transp: If supported the alpha value which can be up to 16 bits wide.
665 * @info: frame buffer info structure
666 */
667 static int sstfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
668 u_int transp, struct fb_info *info)
669 {
670 struct sstfb_par *par = info->par;
671 u32 col;
672
673 f_dddprintk("sstfb_setcolreg\n");
674 f_dddprintk("%-2d rgbt: %#x, %#x, %#x, %#x\n",
675 regno, red, green, blue, transp);
676 if (regno > 15)
677 return 0;
678
679 red >>= (16 - info->var.red.length);
680 green >>= (16 - info->var.green.length);
681 blue >>= (16 - info->var.blue.length);
682 transp >>= (16 - info->var.transp.length);
683 col = (red << info->var.red.offset)
684 | (green << info->var.green.offset)
685 | (blue << info->var.blue.offset)
686 | (transp << info->var.transp.offset);
687
688 par->palette[regno] = col;
689
690 return 0;
691 }
692
693 static void sstfb_setvgapass( struct fb_info *info, int enable )
694 {
695 struct sstfb_par *par = info->par;
696 struct pci_dev *sst_dev = par->dev;
697 u32 fbiinit0, tmp;
698
699 enable = enable ? 1:0;
700 if (par->vgapass == enable)
701 return;
702 par->vgapass = enable;
703
704 pci_read_config_dword(sst_dev, PCI_INIT_ENABLE, &tmp);
705 pci_write_config_dword(sst_dev, PCI_INIT_ENABLE,
706 tmp | PCI_EN_INIT_WR );
707 fbiinit0 = sst_read (FBIINIT0);
708 if (par->vgapass) {
709 sst_write(FBIINIT0, fbiinit0 & ~DIS_VGA_PASSTHROUGH);
710 fb_info(info, "Enabling VGA pass-through\n");
711 } else {
712 sst_write(FBIINIT0, fbiinit0 | DIS_VGA_PASSTHROUGH);
713 fb_info(info, "Disabling VGA pass-through\n");
714 }
715 pci_write_config_dword(sst_dev, PCI_INIT_ENABLE, tmp);
716 }
717
718 static ssize_t store_vgapass(struct device *device, struct device_attribute *attr,
719 const char *buf, size_t count)
720 {
721 struct fb_info *info = dev_get_drvdata(device);
722 char ** last = NULL;
723 int val;
724
725 val = simple_strtoul(buf, last, 0);
726 sstfb_setvgapass(info, val);
727
728 return count;
729 }
730
731 static ssize_t show_vgapass(struct device *device, struct device_attribute *attr,
732 char *buf)
733 {
734 struct fb_info *info = dev_get_drvdata(device);
735 struct sstfb_par *par = info->par;
736 return sprintf(buf, "%d\n", par->vgapass);
737 }
738
739 static struct device_attribute device_attrs[] = {
740 __ATTR(vgapass, S_IRUGO|S_IWUSR, show_vgapass, store_vgapass)
741 };
742
743 static int sstfb_ioctl(struct fb_info *info, unsigned int cmd,
744 unsigned long arg)
745 {
746 struct sstfb_par *par;
747 u32 val;
748
749 switch (cmd) {
750 /* set/get VGA pass_through mode */
751 case SSTFB_SET_VGAPASS:
752 if (copy_from_user(&val, (void __user *)arg, sizeof(val)))
753 return -EFAULT;
754 sstfb_setvgapass(info, val);
755 return 0;
756 case SSTFB_GET_VGAPASS:
757 par = info->par;
758 val = par->vgapass;
759 if (copy_to_user((void __user *)arg, &val, sizeof(val)))
760 return -EFAULT;
761 return 0;
762 }
763
764 return -EINVAL;
765 }
766
767
768 /*
769 * Screen-to-Screen BitBlt 2D command (for the bmove fb op.) - Voodoo2 only
770 */
771 #if 0
772 static void sstfb_copyarea(struct fb_info *info, const struct fb_copyarea *area)
773 {
774 struct sstfb_par *par = info->par;
775 u32 stride = info->fix.line_length;
776
777 if (!IS_VOODOO2(par))
778 return;
779
780 sst_write(BLTSRCBASEADDR, 0);
781 sst_write(BLTDSTBASEADDR, 0);
782 sst_write(BLTROP, BLTROP_COPY);
783 sst_write(BLTXYSTRIDES, stride | (stride << 16));
784 sst_write(BLTSRCXY, area->sx | (area->sy << 16));
785 sst_write(BLTDSTXY, area->dx | (area->dy << 16));
786 sst_write(BLTSIZE, area->width | (area->height << 16));
787 sst_write(BLTCOMMAND, BLT_SCR2SCR_BITBLT | LAUNCH_BITBLT |
788 (BLT_16BPP_FMT << 3) /* | BIT(14) */ | BIT(15) );
789 sst_wait_idle();
790 }
791 #endif
792
793
794 /*
795 * FillRect 2D command (solidfill or invert (via ROP_XOR)) - Voodoo2 only
796 */
797 #if 0
798 static void sstfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
799 {
800 struct sstfb_par *par = info->par;
801 u32 stride = info->fix.line_length;
802
803 if (!IS_VOODOO2(par))
804 return;
805
806 sst_write(BLTCLIPX, info->var.xres);
807 sst_write(BLTCLIPY, info->var.yres);
808
809 sst_write(BLTDSTBASEADDR, 0);
810 sst_write(BLTCOLOR, rect->color);
811 sst_write(BLTROP, rect->rop == ROP_COPY ? BLTROP_COPY : BLTROP_XOR);
812 sst_write(BLTXYSTRIDES, stride | (stride << 16));
813 sst_write(BLTDSTXY, rect->dx | (rect->dy << 16));
814 sst_write(BLTSIZE, rect->width | (rect->height << 16));
815 sst_write(BLTCOMMAND, BLT_RECFILL_BITBLT | LAUNCH_BITBLT
816 | (BLT_16BPP_FMT << 3) /* | BIT(14) */ | BIT(15) | BIT(16) );
817 sst_wait_idle();
818 }
819 #endif
820
821
822
823 /*
824 * get lfb size
825 */
826 static int sst_get_memsize(struct fb_info *info, __u32 *memsize)
827 {
828 u8 __iomem *fbbase_virt = info->screen_base;
829
830 /* force memsize */
831 if (mem >= 1 && mem <= 4) {
832 *memsize = (mem * 0x100000);
833 printk(KERN_INFO "supplied memsize: %#x\n", *memsize);
834 return 1;
835 }
836
837 writel(0xdeadbeef, fbbase_virt);
838 writel(0xdeadbeef, fbbase_virt+0x100000);
839 writel(0xdeadbeef, fbbase_virt+0x200000);
840 f_ddprintk("0MB: %#x, 1MB: %#x, 2MB: %#x\n",
841 readl(fbbase_virt), readl(fbbase_virt + 0x100000),
842 readl(fbbase_virt + 0x200000));
843
844 writel(0xabcdef01, fbbase_virt);
845
846 f_ddprintk("0MB: %#x, 1MB: %#x, 2MB: %#x\n",
847 readl(fbbase_virt), readl(fbbase_virt + 0x100000),
848 readl(fbbase_virt + 0x200000));
849
850 /* checks for 4mb lfb, then 2, then defaults to 1 */
851 if (readl(fbbase_virt + 0x200000) == 0xdeadbeef)
852 *memsize = 0x400000;
853 else if (readl(fbbase_virt + 0x100000) == 0xdeadbeef)
854 *memsize = 0x200000;
855 else
856 *memsize = 0x100000;
857 f_ddprintk("detected memsize: %dMB\n", *memsize >> 20);
858 return 1;
859 }
860
861
862 /*
863 * DAC detection routines
864 */
865
866 /* fbi should be idle, and fifo emty and mem disabled */
867 /* supposed to detect AT&T ATT20C409 and Ti TVP3409 ramdacs */
868
869 static int sst_detect_att(struct fb_info *info)
870 {
871 struct sstfb_par *par = info->par;
872 int i, mir, dir;
873
874 for (i = 0; i < 3; i++) {
875 sst_dac_write(DACREG_WMA, 0); /* backdoor */
876 sst_dac_read(DACREG_RMR); /* read 4 times RMR */
877 sst_dac_read(DACREG_RMR);
878 sst_dac_read(DACREG_RMR);
879 sst_dac_read(DACREG_RMR);
880 /* the fifth time, CR0 is read */
881 sst_dac_read(DACREG_RMR);
882 /* the 6th, manufacturer id register */
883 mir = sst_dac_read(DACREG_RMR);
884 /*the 7th, device ID register */
885 dir = sst_dac_read(DACREG_RMR);
886 f_ddprintk("mir: %#x, dir: %#x\n", mir, dir);
887 if (mir == DACREG_MIR_ATT && dir == DACREG_DIR_ATT) {
888 return 1;
889 }
890 }
891 return 0;
892 }
893
894 static int sst_detect_ti(struct fb_info *info)
895 {
896 struct sstfb_par *par = info->par;
897 int i, mir, dir;
898
899 for (i = 0; i<3; i++) {
900 sst_dac_write(DACREG_WMA, 0); /* backdoor */
901 sst_dac_read(DACREG_RMR); /* read 4 times RMR */
902 sst_dac_read(DACREG_RMR);
903 sst_dac_read(DACREG_RMR);
904 sst_dac_read(DACREG_RMR);
905 /* the fifth time, CR0 is read */
906 sst_dac_read(DACREG_RMR);
907 /* the 6th, manufacturer id register */
908 mir = sst_dac_read(DACREG_RMR);
909 /*the 7th, device ID register */
910 dir = sst_dac_read(DACREG_RMR);
911 f_ddprintk("mir: %#x, dir: %#x\n", mir, dir);
912 if ((mir == DACREG_MIR_TI ) && (dir == DACREG_DIR_TI)) {
913 return 1;
914 }
915 }
916 return 0;
917 }
918
919 /*
920 * try to detect ICS5342 ramdac
921 * we get the 1st byte (M value) of preset f1,f7 and fB
922 * why those 3 ? mmmh... for now, i'll do it the glide way...
923 * and ask questions later. anyway, it seems that all the freq registers are
924 * really at their default state (cf specs) so i ask again, why those 3 regs ?
925 * mmmmh.. it seems that's much more ugly than i thought. we use f0 and fA for
926 * pll programming, so in fact, we *hope* that the f1, f7 & fB won't be
927 * touched...
928 * is it really safe ? how can i reset this ramdac ? geee...
929 */
930 static int sst_detect_ics(struct fb_info *info)
931 {
932 struct sstfb_par *par = info->par;
933 int m_clk0_1, m_clk0_7, m_clk1_b;
934 int n_clk0_1, n_clk0_7, n_clk1_b;
935 int i;
936
937 for (i = 0; i<5; i++ ) {
938 sst_dac_write(DACREG_ICS_PLLRMA, 0x1); /* f1 */
939 m_clk0_1 = sst_dac_read(DACREG_ICS_PLLDATA);
940 n_clk0_1 = sst_dac_read(DACREG_ICS_PLLDATA);
941 sst_dac_write(DACREG_ICS_PLLRMA, 0x7); /* f7 */
942 m_clk0_7 = sst_dac_read(DACREG_ICS_PLLDATA);
943 n_clk0_7 = sst_dac_read(DACREG_ICS_PLLDATA);
944 sst_dac_write(DACREG_ICS_PLLRMA, 0xb); /* fB */
945 m_clk1_b= sst_dac_read(DACREG_ICS_PLLDATA);
946 n_clk1_b= sst_dac_read(DACREG_ICS_PLLDATA);
947 f_ddprintk("m_clk0_1: %#x, m_clk0_7: %#x, m_clk1_b: %#x\n",
948 m_clk0_1, m_clk0_7, m_clk1_b);
949 f_ddprintk("n_clk0_1: %#x, n_clk0_7: %#x, n_clk1_b: %#x\n",
950 n_clk0_1, n_clk0_7, n_clk1_b);
951 if (( m_clk0_1 == DACREG_ICS_PLL_CLK0_1_INI)
952 && (m_clk0_7 == DACREG_ICS_PLL_CLK0_7_INI)
953 && (m_clk1_b == DACREG_ICS_PLL_CLK1_B_INI)) {
954 return 1;
955 }
956 }
957 return 0;
958 }
959
960
961 /*
962 * gfx, video, pci fifo should be reset, dram refresh disabled
963 * see detect_dac
964 */
965
966 static int sst_set_pll_att_ti(struct fb_info *info,
967 const struct pll_timing *t, const int clock)
968 {
969 struct sstfb_par *par = info->par;
970 u8 cr0, cc;
971
972 /* enable indexed mode */
973 sst_dac_write(DACREG_WMA, 0); /* backdoor */
974 sst_dac_read(DACREG_RMR); /* 1 time: RMR */
975 sst_dac_read(DACREG_RMR); /* 2 RMR */
976 sst_dac_read(DACREG_RMR); /* 3 // */
977 sst_dac_read(DACREG_RMR); /* 4 // */
978 cr0 = sst_dac_read(DACREG_RMR); /* 5 CR0 */
979
980 sst_dac_write(DACREG_WMA, 0);
981 sst_dac_read(DACREG_RMR);
982 sst_dac_read(DACREG_RMR);
983 sst_dac_read(DACREG_RMR);
984 sst_dac_read(DACREG_RMR);
985 sst_dac_write(DACREG_RMR, (cr0 & 0xf0)
986 | DACREG_CR0_EN_INDEXED
987 | DACREG_CR0_8BIT
988 | DACREG_CR0_PWDOWN );
989 /* so, now we are in indexed mode . dunno if its common, but
990 i find this way of doing things a little bit weird :p */
991
992 udelay(300);
993 cc = dac_i_read(DACREG_CC_I);
994 switch (clock) {
995 case VID_CLOCK:
996 dac_i_write(DACREG_AC0_I, t->m);
997 dac_i_write(DACREG_AC1_I, t->p << 6 | t->n);
998 dac_i_write(DACREG_CC_I,
999 (cc & 0x0f) | DACREG_CC_CLKA | DACREG_CC_CLKA_C);
1000 break;
1001 case GFX_CLOCK:
1002 dac_i_write(DACREG_BD0_I, t->m);
1003 dac_i_write(DACREG_BD1_I, t->p << 6 | t->n);
1004 dac_i_write(DACREG_CC_I,
1005 (cc & 0xf0) | DACREG_CC_CLKB | DACREG_CC_CLKB_D);
1006 break;
1007 default:
1008 dprintk("%s: wrong clock code '%d'\n",
1009 __func__, clock);
1010 return 0;
1011 }
1012 udelay(300);
1013
1014 /* power up the dac & return to "normal" non-indexed mode */
1015 dac_i_write(DACREG_CR0_I,
1016 cr0 & ~DACREG_CR0_PWDOWN & ~DACREG_CR0_EN_INDEXED);
1017 return 1;
1018 }
1019
1020 static int sst_set_pll_ics(struct fb_info *info,
1021 const struct pll_timing *t, const int clock)
1022 {
1023 struct sstfb_par *par = info->par;
1024 u8 pll_ctrl;
1025
1026 sst_dac_write(DACREG_ICS_PLLRMA, DACREG_ICS_PLL_CTRL);
1027 pll_ctrl = sst_dac_read(DACREG_ICS_PLLDATA);
1028 switch(clock) {
1029 case VID_CLOCK:
1030 sst_dac_write(DACREG_ICS_PLLWMA, 0x0); /* CLK0, f0 */
1031 sst_dac_write(DACREG_ICS_PLLDATA, t->m);
1032 sst_dac_write(DACREG_ICS_PLLDATA, t->p << 5 | t->n);
1033 /* selects freq f0 for clock 0 */
1034 sst_dac_write(DACREG_ICS_PLLWMA, DACREG_ICS_PLL_CTRL);
1035 sst_dac_write(DACREG_ICS_PLLDATA,
1036 (pll_ctrl & 0xd8)
1037 | DACREG_ICS_CLK0
1038 | DACREG_ICS_CLK0_0);
1039 break;
1040 case GFX_CLOCK :
1041 sst_dac_write(DACREG_ICS_PLLWMA, 0xa); /* CLK1, fA */
1042 sst_dac_write(DACREG_ICS_PLLDATA, t->m);
1043 sst_dac_write(DACREG_ICS_PLLDATA, t->p << 5 | t->n);
1044 /* selects freq fA for clock 1 */
1045 sst_dac_write(DACREG_ICS_PLLWMA, DACREG_ICS_PLL_CTRL);
1046 sst_dac_write(DACREG_ICS_PLLDATA,
1047 (pll_ctrl & 0xef) | DACREG_ICS_CLK1_A);
1048 break;
1049 default:
1050 dprintk("%s: wrong clock code '%d'\n",
1051 __func__, clock);
1052 return 0;
1053 }
1054 udelay(300);
1055 return 1;
1056 }
1057
1058 static void sst_set_vidmod_att_ti(struct fb_info *info, const int bpp)
1059 {
1060 struct sstfb_par *par = info->par;
1061 u8 cr0;
1062
1063 sst_dac_write(DACREG_WMA, 0); /* backdoor */
1064 sst_dac_read(DACREG_RMR); /* read 4 times RMR */
1065 sst_dac_read(DACREG_RMR);
1066 sst_dac_read(DACREG_RMR);
1067 sst_dac_read(DACREG_RMR);
1068 /* the fifth time, CR0 is read */
1069 cr0 = sst_dac_read(DACREG_RMR);
1070
1071 sst_dac_write(DACREG_WMA, 0); /* backdoor */
1072 sst_dac_read(DACREG_RMR); /* read 4 times RMR */
1073 sst_dac_read(DACREG_RMR);
1074 sst_dac_read(DACREG_RMR);
1075 sst_dac_read(DACREG_RMR);
1076 /* cr0 */
1077 switch(bpp) {
1078 case 16:
1079 sst_dac_write(DACREG_RMR, (cr0 & 0x0f) | DACREG_CR0_16BPP);
1080 break;
1081 default:
1082 dprintk("%s: bad depth '%u'\n", __func__, bpp);
1083 break;
1084 }
1085 }
1086
1087 static void sst_set_vidmod_ics(struct fb_info *info, const int bpp)
1088 {
1089 struct sstfb_par *par = info->par;
1090
1091 switch(bpp) {
1092 case 16:
1093 sst_dac_write(DACREG_ICS_CMD, DACREG_ICS_CMD_16BPP);
1094 break;
1095 default:
1096 dprintk("%s: bad depth '%u'\n", __func__, bpp);
1097 break;
1098 }
1099 }
1100
1101 /*
1102 * detect dac type
1103 * prerequisite : write to FbiInitx enabled, video and fbi and pci fifo reset,
1104 * dram refresh disabled, FbiInit remaped.
1105 * TODO: mmh.. maybe i should put the "prerequisite" in the func ...
1106 */
1107
1108
1109 static struct dac_switch dacs[] = {
1110 { .name = "TI TVP3409",
1111 .detect = sst_detect_ti,
1112 .set_pll = sst_set_pll_att_ti,
1113 .set_vidmod = sst_set_vidmod_att_ti },
1114
1115 { .name = "AT&T ATT20C409",
1116 .detect = sst_detect_att,
1117 .set_pll = sst_set_pll_att_ti,
1118 .set_vidmod = sst_set_vidmod_att_ti },
1119 { .name = "ICS ICS5342",
1120 .detect = sst_detect_ics,
1121 .set_pll = sst_set_pll_ics,
1122 .set_vidmod = sst_set_vidmod_ics },
1123 };
1124
1125 static int sst_detect_dactype(struct fb_info *info, struct sstfb_par *par)
1126 {
1127 int i, ret = 0;
1128
1129 for (i = 0; i < ARRAY_SIZE(dacs); i++) {
1130 ret = dacs[i].detect(info);
1131 if (ret)
1132 break;
1133 }
1134 if (!ret)
1135 return 0;
1136 f_dprintk("%s found %s\n", __func__, dacs[i].name);
1137 par->dac_sw = dacs[i];
1138 return 1;
1139 }
1140
1141 /*
1142 * Internal Routines
1143 */
1144 static int sst_init(struct fb_info *info, struct sstfb_par *par)
1145 {
1146 u32 fbiinit0, fbiinit1, fbiinit4;
1147 struct pci_dev *dev = par->dev;
1148 struct pll_timing gfx_timings;
1149 struct sst_spec *spec;
1150 int Fout;
1151 int gfx_clock;
1152
1153 spec = &voodoo_spec[par->type];
1154 f_ddprintk(" fbiinit0 fbiinit1 fbiinit2 fbiinit3 fbiinit4 "
1155 " fbiinit6\n");
1156 f_ddprintk("%0#10x %0#10x %0#10x %0#10x %0#10x %0#10x\n",
1157 sst_read(FBIINIT0), sst_read(FBIINIT1), sst_read(FBIINIT2),
1158 sst_read(FBIINIT3), sst_read(FBIINIT4), sst_read(FBIINIT6));
1159 /* disable video clock */
1160 pci_write_config_dword(dev, PCI_VCLK_DISABLE, 0);
1161
1162 /* enable writing to init registers, disable pci fifo */
1163 pci_write_config_dword(dev, PCI_INIT_ENABLE, PCI_EN_INIT_WR);
1164 /* reset video */
1165 sst_set_bits(FBIINIT1, VIDEO_RESET);
1166 sst_wait_idle();
1167 /* reset gfx + pci fifo */
1168 sst_set_bits(FBIINIT0, FBI_RESET | FIFO_RESET);
1169 sst_wait_idle();
1170
1171 /* unreset fifo */
1172 /*sst_unset_bits(FBIINIT0, FIFO_RESET);
1173 sst_wait_idle();*/
1174 /* unreset FBI */
1175 /*sst_unset_bits(FBIINIT0, FBI_RESET);
1176 sst_wait_idle();*/
1177
1178 /* disable dram refresh */
1179 sst_unset_bits(FBIINIT2, EN_DRAM_REFRESH);
1180 sst_wait_idle();
1181 /* remap fbinit2/3 to dac */
1182 pci_write_config_dword(dev, PCI_INIT_ENABLE,
1183 PCI_EN_INIT_WR | PCI_REMAP_DAC );
1184 /* detect dac type */
1185 if (!sst_detect_dactype(info, par)) {
1186 printk(KERN_ERR "sstfb: unknown dac type.\n");
1187 //FIXME watch it: we are not in a safe state, bad bad bad.
1188 return 0;
1189 }
1190
1191 /* set graphic clock */
1192 gfx_clock = spec->default_gfx_clock;
1193 if ((gfxclk >10 ) && (gfxclk < spec->max_gfxclk)) {
1194 printk(KERN_INFO "sstfb: Using supplied graphic freq : %dMHz\n", gfxclk);
1195 gfx_clock = gfxclk *1000;
1196 } else if (gfxclk) {
1197 printk(KERN_WARNING "sstfb: %dMhz is way out of spec! Using default\n", gfxclk);
1198 }
1199
1200 sst_calc_pll(gfx_clock, &Fout, &gfx_timings);
1201 par->dac_sw.set_pll(info, &gfx_timings, GFX_CLOCK);
1202
1203 /* disable fbiinit remap */
1204 pci_write_config_dword(dev, PCI_INIT_ENABLE,
1205 PCI_EN_INIT_WR| PCI_EN_FIFO_WR );
1206 /* defaults init registers */
1207 /* FbiInit0: unreset gfx, unreset fifo */
1208 fbiinit0 = FBIINIT0_DEFAULT;
1209 fbiinit1 = FBIINIT1_DEFAULT;
1210 fbiinit4 = FBIINIT4_DEFAULT;
1211 par->vgapass = vgapass;
1212 if (par->vgapass)
1213 fbiinit0 &= ~DIS_VGA_PASSTHROUGH;
1214 else
1215 fbiinit0 |= DIS_VGA_PASSTHROUGH;
1216 if (slowpci) {
1217 fbiinit1 |= SLOW_PCI_WRITES;
1218 fbiinit4 |= SLOW_PCI_READS;
1219 } else {
1220 fbiinit1 &= ~SLOW_PCI_WRITES;
1221 fbiinit4 &= ~SLOW_PCI_READS;
1222 }
1223 sst_write(FBIINIT0, fbiinit0);
1224 sst_wait_idle();
1225 sst_write(FBIINIT1, fbiinit1);
1226 sst_wait_idle();
1227 sst_write(FBIINIT2, FBIINIT2_DEFAULT);
1228 sst_wait_idle();
1229 sst_write(FBIINIT3, FBIINIT3_DEFAULT);
1230 sst_wait_idle();
1231 sst_write(FBIINIT4, fbiinit4);
1232 sst_wait_idle();
1233 if (IS_VOODOO2(par)) {
1234 sst_write(FBIINIT6, FBIINIT6_DEFAULT);
1235 sst_wait_idle();
1236 }
1237
1238 pci_write_config_dword(dev, PCI_INIT_ENABLE, PCI_EN_FIFO_WR);
1239 pci_write_config_dword(dev, PCI_VCLK_ENABLE, 0);
1240 return 1;
1241 }
1242
1243 static void sst_shutdown(struct fb_info *info)
1244 {
1245 struct sstfb_par *par = info->par;
1246 struct pci_dev *dev = par->dev;
1247 struct pll_timing gfx_timings;
1248 int Fout;
1249
1250 /* reset video, gfx, fifo, disable dram + remap fbiinit2/3 */
1251 pci_write_config_dword(dev, PCI_INIT_ENABLE, PCI_EN_INIT_WR);
1252 sst_set_bits(FBIINIT1, VIDEO_RESET | EN_BLANKING);
1253 sst_unset_bits(FBIINIT2, EN_DRAM_REFRESH);
1254 sst_set_bits(FBIINIT0, FBI_RESET | FIFO_RESET);
1255 sst_wait_idle();
1256 pci_write_config_dword(dev, PCI_INIT_ENABLE,
1257 PCI_EN_INIT_WR | PCI_REMAP_DAC);
1258 /* set 20Mhz gfx clock */
1259 sst_calc_pll(20000, &Fout, &gfx_timings);
1260 par->dac_sw.set_pll(info, &gfx_timings, GFX_CLOCK);
1261 /* TODO maybe shutdown the dac, vrefresh and so on... */
1262 pci_write_config_dword(dev, PCI_INIT_ENABLE,
1263 PCI_EN_INIT_WR);
1264 sst_unset_bits(FBIINIT0, FBI_RESET | FIFO_RESET | DIS_VGA_PASSTHROUGH);
1265 pci_write_config_dword(dev, PCI_VCLK_DISABLE,0);
1266 /* maybe keep fbiinit* and PCI_INIT_enable in the fb_info struct
1267 * from start ? */
1268 pci_write_config_dword(dev, PCI_INIT_ENABLE, 0);
1269
1270 }
1271
1272 /*
1273 * Interface to the world
1274 */
1275 static int sstfb_setup(char *options)
1276 {
1277 char *this_opt;
1278
1279 if (!options || !*options)
1280 return 0;
1281
1282 while ((this_opt = strsep(&options, ",")) != NULL) {
1283 if (!*this_opt) continue;
1284
1285 f_ddprintk("option %s\n", this_opt);
1286
1287 if (!strcmp(this_opt, "vganopass"))
1288 vgapass = 0;
1289 else if (!strcmp(this_opt, "vgapass"))
1290 vgapass = 1;
1291 else if (!strcmp(this_opt, "clipping"))
1292 clipping = 1;
1293 else if (!strcmp(this_opt, "noclipping"))
1294 clipping = 0;
1295 else if (!strcmp(this_opt, "fastpci"))
1296 slowpci = 0;
1297 else if (!strcmp(this_opt, "slowpci"))
1298 slowpci = 1;
1299 else if (!strncmp(this_opt, "mem:",4))
1300 mem = simple_strtoul (this_opt+4, NULL, 0);
1301 else if (!strncmp(this_opt, "gfxclk:",7))
1302 gfxclk = simple_strtoul (this_opt+7, NULL, 0);
1303 else
1304 mode_option = this_opt;
1305 }
1306 return 0;
1307 }
1308
1309
1310 static const struct fb_ops sstfb_ops = {
1311 .owner = THIS_MODULE,
1312 .fb_check_var = sstfb_check_var,
1313 .fb_set_par = sstfb_set_par,
1314 .fb_setcolreg = sstfb_setcolreg,
1315 .fb_fillrect = cfb_fillrect, /* sstfb_fillrect */
1316 .fb_copyarea = cfb_copyarea, /* sstfb_copyarea */
1317 .fb_imageblit = cfb_imageblit,
1318 .fb_ioctl = sstfb_ioctl,
1319 };
1320
1321 static int sstfb_probe(struct pci_dev *pdev, const struct pci_device_id *id)
1322 {
1323 struct fb_info *info;
1324 struct fb_fix_screeninfo *fix;
1325 struct sstfb_par *par;
1326 struct sst_spec *spec;
1327 int err;
1328
1329 /* Enable device in PCI config. */
1330 if ((err=pci_enable_device(pdev))) {
1331 printk(KERN_ERR "cannot enable device\n");
1332 return err;
1333 }
1334
1335 /* Allocate the fb and par structures. */
1336 info = framebuffer_alloc(sizeof(struct sstfb_par), &pdev->dev);
1337 if (!info)
1338 return -ENOMEM;
1339
1340 pci_set_drvdata(pdev, info);
1341
1342 par = info->par;
1343 fix = &info->fix;
1344
1345 par->type = id->driver_data;
1346 spec = &voodoo_spec[par->type];
1347 f_ddprintk("found device : %s\n", spec->name);
1348
1349 par->dev = pdev;
1350 par->revision = pdev->revision;
1351
1352 fix->mmio_start = pci_resource_start(pdev,0);
1353 fix->mmio_len = 0x400000;
1354 fix->smem_start = fix->mmio_start + 0x400000;
1355
1356 if (!request_mem_region(fix->mmio_start, fix->mmio_len, "sstfb MMIO")) {
1357 printk(KERN_ERR "sstfb: cannot reserve mmio memory\n");
1358 goto fail_mmio_mem;
1359 }
1360
1361 if (!request_mem_region(fix->smem_start, 0x400000,"sstfb FB")) {
1362 printk(KERN_ERR "sstfb: cannot reserve fb memory\n");
1363 goto fail_fb_mem;
1364 }
1365
1366 par->mmio_vbase = ioremap(fix->mmio_start,
1367 fix->mmio_len);
1368 if (!par->mmio_vbase) {
1369 printk(KERN_ERR "sstfb: cannot remap register area %#lx\n",
1370 fix->mmio_start);
1371 goto fail_mmio_remap;
1372 }
1373 info->screen_base = ioremap(fix->smem_start, 0x400000);
1374 if (!info->screen_base) {
1375 printk(KERN_ERR "sstfb: cannot remap framebuffer %#lx\n",
1376 fix->smem_start);
1377 goto fail_fb_remap;
1378 }
1379
1380 if (!sst_init(info, par)) {
1381 printk(KERN_ERR "sstfb: Init failed\n");
1382 goto fail;
1383 }
1384 sst_get_memsize(info, &fix->smem_len);
1385 strlcpy(fix->id, spec->name, sizeof(fix->id));
1386
1387 printk(KERN_INFO "%s (revision %d) with %s dac\n",
1388 fix->id, par->revision, par->dac_sw.name);
1389 printk(KERN_INFO "framebuffer at %#lx, mapped to 0x%p, size %dMB\n",
1390 fix->smem_start, info->screen_base,
1391 fix->smem_len >> 20);
1392
1393 f_ddprintk("regbase_virt: %#lx\n", par->mmio_vbase);
1394 f_ddprintk("membase_phys: %#lx\n", fix->smem_start);
1395 f_ddprintk("fbbase_virt: %p\n", info->screen_base);
1396
1397 info->flags = FBINFO_DEFAULT;
1398 info->fbops = &sstfb_ops;
1399 info->pseudo_palette = par->palette;
1400
1401 fix->type = FB_TYPE_PACKED_PIXELS;
1402 fix->visual = FB_VISUAL_TRUECOLOR;
1403 fix->accel = FB_ACCEL_NONE; /* FIXME */
1404 /*
1405 * According to the specs, the linelength must be of 1024 *pixels*
1406 * and the 24bpp mode is in fact a 32 bpp mode (and both are in
1407 * fact dithered to 16bit).
1408 */
1409 fix->line_length = 2048; /* default value, for 24 or 32bit: 4096 */
1410
1411 fb_find_mode(&info->var, info, mode_option, NULL, 0, NULL, 16);
1412
1413 if (sstfb_check_var(&info->var, info)) {
1414 printk(KERN_ERR "sstfb: invalid video mode.\n");
1415 goto fail;
1416 }
1417
1418 if (sstfb_set_par(info)) {
1419 printk(KERN_ERR "sstfb: can't set default video mode.\n");
1420 goto fail;
1421 }
1422
1423 if (fb_alloc_cmap(&info->cmap, 256, 0)) {
1424 printk(KERN_ERR "sstfb: can't alloc cmap memory.\n");
1425 goto fail;
1426 }
1427
1428 /* register fb */
1429 info->device = &pdev->dev;
1430 if (register_framebuffer(info) < 0) {
1431 printk(KERN_ERR "sstfb: can't register framebuffer.\n");
1432 goto fail_register;
1433 }
1434
1435 sstfb_clear_screen(info);
1436
1437 if (device_create_file(info->dev, &device_attrs[0]))
1438 printk(KERN_WARNING "sstfb: can't create sysfs entry.\n");
1439
1440
1441 fb_info(info, "%s frame buffer device at 0x%p\n",
1442 fix->id, info->screen_base);
1443
1444 return 0;
1445
1446 fail_register:
1447 fb_dealloc_cmap(&info->cmap);
1448 fail:
1449 iounmap(info->screen_base);
1450 fail_fb_remap:
1451 iounmap(par->mmio_vbase);
1452 fail_mmio_remap:
1453 release_mem_region(fix->smem_start, 0x400000);
1454 fail_fb_mem:
1455 release_mem_region(fix->mmio_start, info->fix.mmio_len);
1456 fail_mmio_mem:
1457 framebuffer_release(info);
1458 return -ENXIO; /* no voodoo detected */
1459 }
1460
1461 static void sstfb_remove(struct pci_dev *pdev)
1462 {
1463 struct sstfb_par *par;
1464 struct fb_info *info;
1465
1466 info = pci_get_drvdata(pdev);
1467 par = info->par;
1468
1469 device_remove_file(info->dev, &device_attrs[0]);
1470 sst_shutdown(info);
1471 iounmap(info->screen_base);
1472 iounmap(par->mmio_vbase);
1473 release_mem_region(info->fix.smem_start, 0x400000);
1474 release_mem_region(info->fix.mmio_start, info->fix.mmio_len);
1475 fb_dealloc_cmap(&info->cmap);
1476 unregister_framebuffer(info);
1477 framebuffer_release(info);
1478 }
1479
1480
1481 static const struct pci_device_id sstfb_id_tbl[] = {
1482 { PCI_DEVICE(PCI_VENDOR_ID_3DFX, PCI_DEVICE_ID_3DFX_VOODOO ),
1483 .driver_data = ID_VOODOO1, },
1484 { PCI_DEVICE(PCI_VENDOR_ID_3DFX, PCI_DEVICE_ID_3DFX_VOODOO2),
1485 .driver_data = ID_VOODOO2, },
1486 { 0 },
1487 };
1488
1489 static struct pci_driver sstfb_driver = {
1490 .name = "sstfb",
1491 .id_table = sstfb_id_tbl,
1492 .probe = sstfb_probe,
1493 .remove = sstfb_remove,
1494 };
1495
1496
1497 static int sstfb_init(void)
1498 {
1499 char *option = NULL;
1500
1501 if (fb_get_options("sstfb", &option))
1502 return -ENODEV;
1503 sstfb_setup(option);
1504
1505 return pci_register_driver(&sstfb_driver);
1506 }
1507
1508 static void sstfb_exit(void)
1509 {
1510 pci_unregister_driver(&sstfb_driver);
1511 }
1512
1513
1514 module_init(sstfb_init);
1515 module_exit(sstfb_exit);
1516
1517 MODULE_AUTHOR("(c) 2000,2002 Ghozlane Toumi <gtoumi@laposte.net>");
1518 MODULE_DESCRIPTION("FBDev driver for 3dfx Voodoo Graphics and Voodoo2 based video boards");
1519 MODULE_LICENSE("GPL");
1520
1521 module_param(mem, int, 0);
1522 MODULE_PARM_DESC(mem, "Size of frame buffer memory in MB (1, 2, 4 MB, default=autodetect)");
1523 module_param(vgapass, bool, 0);
1524 MODULE_PARM_DESC(vgapass, "Enable VGA PassThrough mode (0 or 1) (default=0)");
1525 module_param(clipping, bool, 0);
1526 MODULE_PARM_DESC(clipping, "Enable clipping (slower, safer) (0 or 1) (default=1)");
1527 module_param(gfxclk, int, 0);
1528 MODULE_PARM_DESC(gfxclk, "Force graphic chip frequency in MHz. DANGEROUS. (default=auto)");
1529 module_param(slowpci, bool, 0);
1530 MODULE_PARM_DESC(slowpci, "Uses slow PCI settings (0 or 1) (default=0)");
1531 module_param(mode_option, charp, 0);
1532 MODULE_PARM_DESC(mode_option, "Initial video mode (default=" DEFAULT_VIDEO_MODE ")");
1533
Linux with added FPC-III support