1 /*
2 * linux/drivers/video/s3fb.c -- Frame buffer device driver for S3 Trio/Virge
3 *
4 * Copyright (c) 2006-2007 Ondrej Zajicek <santiago@crfreenet.org>
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file COPYING in the main directory of this archive for
8 * more details.
9 *
10 * Code is based on David Boucher's viafb (http://davesdomain.org.uk/viafb/)
11 * which is based on the code of neofb.
12 */
13
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/errno.h>
17 #include <linux/string.h>
18 #include <linux/mm.h>
19 #include <linux/tty.h>
20 #include <linux/delay.h>
21 #include <linux/fb.h>
22 #include <linux/svga.h>
23 #include <linux/init.h>
24 #include <linux/pci.h>
25 #include <linux/console.h> /* Why should fb driver call console functions? because console_lock() */
26 #include <video/vga.h>
27
28 #include <linux/i2c.h>
29 #include <linux/i2c-algo-bit.h>
30
31 struct s3fb_info {
32 int chip, rev, mclk_freq;
33 int wc_cookie;
34 struct vgastate state;
35 struct mutex open_lock;
36 unsigned int ref_count;
37 u32 pseudo_palette[16];
38 #ifdef CONFIG_FB_S3_DDC
39 u8 __iomem *mmio;
40 bool ddc_registered;
41 struct i2c_adapter ddc_adapter;
42 struct i2c_algo_bit_data ddc_algo;
43 #endif
44 };
45
46
47 /* ------------------------------------------------------------------------- */
48
49 static const struct svga_fb_format s3fb_formats[] = {
50 { 0, {0, 6, 0}, {0, 6, 0}, {0, 6, 0}, {0, 0, 0}, 0,
51 FB_TYPE_TEXT, FB_AUX_TEXT_SVGA_STEP4, FB_VISUAL_PSEUDOCOLOR, 8, 16},
52 { 4, {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0}, 0,
53 FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_PSEUDOCOLOR, 8, 16},
54 { 4, {0, 4, 0}, {0, 4, 0}, {0, 4, 0}, {0, 0, 0}, 1,
55 FB_TYPE_INTERLEAVED_PLANES, 1, FB_VISUAL_PSEUDOCOLOR, 8, 16},
56 { 8, {0, 8, 0}, {0, 8, 0}, {0, 8, 0}, {0, 0, 0}, 0,
57 FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_PSEUDOCOLOR, 4, 8},
58 {16, {10, 5, 0}, {5, 5, 0}, {0, 5, 0}, {0, 0, 0}, 0,
59 FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_TRUECOLOR, 2, 4},
60 {16, {11, 5, 0}, {5, 6, 0}, {0, 5, 0}, {0, 0, 0}, 0,
61 FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_TRUECOLOR, 2, 4},
62 {24, {16, 8, 0}, {8, 8, 0}, {0, 8, 0}, {0, 0, 0}, 0,
63 FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_TRUECOLOR, 1, 2},
64 {32, {16, 8, 0}, {8, 8, 0}, {0, 8, 0}, {0, 0, 0}, 0,
65 FB_TYPE_PACKED_PIXELS, 0, FB_VISUAL_TRUECOLOR, 1, 2},
66 SVGA_FORMAT_END
67 };
68
69
70 static const struct svga_pll s3_pll = {3, 129, 3, 33, 0, 3,
71 35000, 240000, 14318};
72 static const struct svga_pll s3_trio3d_pll = {3, 129, 3, 31, 0, 4,
73 230000, 460000, 14318};
74
75 static const int s3_memsizes[] = {4096, 0, 3072, 8192, 2048, 6144, 1024, 512};
76
77 static const char * const s3_names[] = {"S3 Unknown", "S3 Trio32", "S3 Trio64", "S3 Trio64V+",
78 "S3 Trio64UV+", "S3 Trio64V2/DX", "S3 Trio64V2/GX",
79 "S3 Plato/PX", "S3 Aurora64V+", "S3 Virge",
80 "S3 Virge/VX", "S3 Virge/DX", "S3 Virge/GX",
81 "S3 Virge/GX2", "S3 Virge/GX2+", "",
82 "S3 Trio3D/1X", "S3 Trio3D/2X", "S3 Trio3D/2X",
83 "S3 Trio3D", "S3 Virge/MX"};
84
85 #define CHIP_UNKNOWN 0x00
86 #define CHIP_732_TRIO32 0x01
87 #define CHIP_764_TRIO64 0x02
88 #define CHIP_765_TRIO64VP 0x03
89 #define CHIP_767_TRIO64UVP 0x04
90 #define CHIP_775_TRIO64V2_DX 0x05
91 #define CHIP_785_TRIO64V2_GX 0x06
92 #define CHIP_551_PLATO_PX 0x07
93 #define CHIP_M65_AURORA64VP 0x08
94 #define CHIP_325_VIRGE 0x09
95 #define CHIP_988_VIRGE_VX 0x0A
96 #define CHIP_375_VIRGE_DX 0x0B
97 #define CHIP_385_VIRGE_GX 0x0C
98 #define CHIP_357_VIRGE_GX2 0x0D
99 #define CHIP_359_VIRGE_GX2P 0x0E
100 #define CHIP_360_TRIO3D_1X 0x10
101 #define CHIP_362_TRIO3D_2X 0x11
102 #define CHIP_368_TRIO3D_2X 0x12
103 #define CHIP_365_TRIO3D 0x13
104 #define CHIP_260_VIRGE_MX 0x14
105
106 #define CHIP_XXX_TRIO 0x80
107 #define CHIP_XXX_TRIO64V2_DXGX 0x81
108 #define CHIP_XXX_VIRGE_DXGX 0x82
109 #define CHIP_36X_TRIO3D_1X_2X 0x83
110
111 #define CHIP_UNDECIDED_FLAG 0x80
112 #define CHIP_MASK 0xFF
113
114 #define MMIO_OFFSET 0x1000000
115 #define MMIO_SIZE 0x10000
116
117 /* CRT timing register sets */
118
119 static const struct vga_regset s3_h_total_regs[] = {{0x00, 0, 7}, {0x5D, 0, 0}, VGA_REGSET_END};
120 static const struct vga_regset s3_h_display_regs[] = {{0x01, 0, 7}, {0x5D, 1, 1}, VGA_REGSET_END};
121 static const struct vga_regset s3_h_blank_start_regs[] = {{0x02, 0, 7}, {0x5D, 2, 2}, VGA_REGSET_END};
122 static const struct vga_regset s3_h_blank_end_regs[] = {{0x03, 0, 4}, {0x05, 7, 7}, VGA_REGSET_END};
123 static const struct vga_regset s3_h_sync_start_regs[] = {{0x04, 0, 7}, {0x5D, 4, 4}, VGA_REGSET_END};
124 static const struct vga_regset s3_h_sync_end_regs[] = {{0x05, 0, 4}, VGA_REGSET_END};
125
126 static const struct vga_regset s3_v_total_regs[] = {{0x06, 0, 7}, {0x07, 0, 0}, {0x07, 5, 5}, {0x5E, 0, 0}, VGA_REGSET_END};
127 static const struct vga_regset s3_v_display_regs[] = {{0x12, 0, 7}, {0x07, 1, 1}, {0x07, 6, 6}, {0x5E, 1, 1}, VGA_REGSET_END};
128 static const struct vga_regset s3_v_blank_start_regs[] = {{0x15, 0, 7}, {0x07, 3, 3}, {0x09, 5, 5}, {0x5E, 2, 2}, VGA_REGSET_END};
129 static const struct vga_regset s3_v_blank_end_regs[] = {{0x16, 0, 7}, VGA_REGSET_END};
130 static const struct vga_regset s3_v_sync_start_regs[] = {{0x10, 0, 7}, {0x07, 2, 2}, {0x07, 7, 7}, {0x5E, 4, 4}, VGA_REGSET_END};
131 static const struct vga_regset s3_v_sync_end_regs[] = {{0x11, 0, 3}, VGA_REGSET_END};
132
133 static const struct vga_regset s3_line_compare_regs[] = {{0x18, 0, 7}, {0x07, 4, 4}, {0x09, 6, 6}, {0x5E, 6, 6}, VGA_REGSET_END};
134 static const struct vga_regset s3_start_address_regs[] = {{0x0d, 0, 7}, {0x0c, 0, 7}, {0x69, 0, 4}, VGA_REGSET_END};
135 static const struct vga_regset s3_offset_regs[] = {{0x13, 0, 7}, {0x51, 4, 5}, VGA_REGSET_END}; /* set 0x43 bit 2 to 0 */
136
137 static const struct vga_regset s3_dtpc_regs[] = {{0x3B, 0, 7}, {0x5D, 6, 6}, VGA_REGSET_END};
138
139 static const struct svga_timing_regs s3_timing_regs = {
140 s3_h_total_regs, s3_h_display_regs, s3_h_blank_start_regs,
141 s3_h_blank_end_regs, s3_h_sync_start_regs, s3_h_sync_end_regs,
142 s3_v_total_regs, s3_v_display_regs, s3_v_blank_start_regs,
143 s3_v_blank_end_regs, s3_v_sync_start_regs, s3_v_sync_end_regs,
144 };
145
146
147 /* ------------------------------------------------------------------------- */
148
149 /* Module parameters */
150
151
152 static char *mode_option;
153 static int mtrr = 1;
154 static int fasttext = 1;
155
156
157 MODULE_AUTHOR("(c) 2006-2007 Ondrej Zajicek <santiago@crfreenet.org>");
158 MODULE_LICENSE("GPL");
159 MODULE_DESCRIPTION("fbdev driver for S3 Trio/Virge");
160
161 module_param(mode_option, charp, 0444);
162 MODULE_PARM_DESC(mode_option, "Default video mode ('640x480-8@60', etc)");
163 module_param_named(mode, mode_option, charp, 0444);
164 MODULE_PARM_DESC(mode, "Default video mode ('640x480-8@60', etc) (deprecated)");
165 module_param(mtrr, int, 0444);
166 MODULE_PARM_DESC(mtrr, "Enable write-combining with MTRR (1=enable, 0=disable, default=1)");
167
168 module_param(fasttext, int, 0644);
169 MODULE_PARM_DESC(fasttext, "Enable S3 fast text mode (1=enable, 0=disable, default=1)");
170
171
172 /* ------------------------------------------------------------------------- */
173
174 #ifdef CONFIG_FB_S3_DDC
175
176 #define DDC_REG 0xaa /* Trio 3D/1X/2X */
177 #define DDC_MMIO_REG 0xff20 /* all other chips */
178 #define DDC_SCL_OUT (1 << 0)
179 #define DDC_SDA_OUT (1 << 1)
180 #define DDC_SCL_IN (1 << 2)
181 #define DDC_SDA_IN (1 << 3)
182 #define DDC_DRIVE_EN (1 << 4)
183
s3fb_ddc_needs_mmio(int chip)184 static bool s3fb_ddc_needs_mmio(int chip)
185 {
186 return !(chip == CHIP_360_TRIO3D_1X ||
187 chip == CHIP_362_TRIO3D_2X ||
188 chip == CHIP_368_TRIO3D_2X);
189 }
190
s3fb_ddc_read(struct s3fb_info * par)191 static u8 s3fb_ddc_read(struct s3fb_info *par)
192 {
193 if (s3fb_ddc_needs_mmio(par->chip))
194 return readb(par->mmio + DDC_MMIO_REG);
195 else
196 return vga_rcrt(par->state.vgabase, DDC_REG);
197 }
198
s3fb_ddc_write(struct s3fb_info * par,u8 val)199 static void s3fb_ddc_write(struct s3fb_info *par, u8 val)
200 {
201 if (s3fb_ddc_needs_mmio(par->chip))
202 writeb(val, par->mmio + DDC_MMIO_REG);
203 else
204 vga_wcrt(par->state.vgabase, DDC_REG, val);
205 }
206
s3fb_ddc_setscl(void * data,int val)207 static void s3fb_ddc_setscl(void *data, int val)
208 {
209 struct s3fb_info *par = data;
210 unsigned char reg;
211
212 reg = s3fb_ddc_read(par) | DDC_DRIVE_EN;
213 if (val)
214 reg |= DDC_SCL_OUT;
215 else
216 reg &= ~DDC_SCL_OUT;
217 s3fb_ddc_write(par, reg);
218 }
219
s3fb_ddc_setsda(void * data,int val)220 static void s3fb_ddc_setsda(void *data, int val)
221 {
222 struct s3fb_info *par = data;
223 unsigned char reg;
224
225 reg = s3fb_ddc_read(par) | DDC_DRIVE_EN;
226 if (val)
227 reg |= DDC_SDA_OUT;
228 else
229 reg &= ~DDC_SDA_OUT;
230 s3fb_ddc_write(par, reg);
231 }
232
s3fb_ddc_getscl(void * data)233 static int s3fb_ddc_getscl(void *data)
234 {
235 struct s3fb_info *par = data;
236
237 return !!(s3fb_ddc_read(par) & DDC_SCL_IN);
238 }
239
s3fb_ddc_getsda(void * data)240 static int s3fb_ddc_getsda(void *data)
241 {
242 struct s3fb_info *par = data;
243
244 return !!(s3fb_ddc_read(par) & DDC_SDA_IN);
245 }
246
s3fb_setup_ddc_bus(struct fb_info * info)247 static int s3fb_setup_ddc_bus(struct fb_info *info)
248 {
249 struct s3fb_info *par = info->par;
250
251 strlcpy(par->ddc_adapter.name, info->fix.id,
252 sizeof(par->ddc_adapter.name));
253 par->ddc_adapter.owner = THIS_MODULE;
254 par->ddc_adapter.class = I2C_CLASS_DDC;
255 par->ddc_adapter.algo_data = &par->ddc_algo;
256 par->ddc_adapter.dev.parent = info->device;
257 par->ddc_algo.setsda = s3fb_ddc_setsda;
258 par->ddc_algo.setscl = s3fb_ddc_setscl;
259 par->ddc_algo.getsda = s3fb_ddc_getsda;
260 par->ddc_algo.getscl = s3fb_ddc_getscl;
261 par->ddc_algo.udelay = 10;
262 par->ddc_algo.timeout = 20;
263 par->ddc_algo.data = par;
264
265 i2c_set_adapdata(&par->ddc_adapter, par);
266
267 /*
268 * some Virge cards have external MUX to switch chip I2C bus between
269 * DDC and extension pins - switch it do DDC
270 */
271 /* vga_wseq(par->state.vgabase, 0x08, 0x06); - not needed, already unlocked */
272 if (par->chip == CHIP_357_VIRGE_GX2 ||
273 par->chip == CHIP_359_VIRGE_GX2P ||
274 par->chip == CHIP_260_VIRGE_MX)
275 svga_wseq_mask(par->state.vgabase, 0x0d, 0x01, 0x03);
276 else
277 svga_wseq_mask(par->state.vgabase, 0x0d, 0x00, 0x03);
278 /* some Virge need this or the DDC is ignored */
279 svga_wcrt_mask(par->state.vgabase, 0x5c, 0x03, 0x03);
280
281 return i2c_bit_add_bus(&par->ddc_adapter);
282 }
283 #endif /* CONFIG_FB_S3_DDC */
284
285
286 /* ------------------------------------------------------------------------- */
287
288 /* Set font in S3 fast text mode */
289
s3fb_settile_fast(struct fb_info * info,struct fb_tilemap * map)290 static void s3fb_settile_fast(struct fb_info *info, struct fb_tilemap *map)
291 {
292 const u8 *font = map->data;
293 u8 __iomem *fb = (u8 __iomem *) info->screen_base;
294 int i, c;
295
296 if ((map->width != 8) || (map->height != 16) ||
297 (map->depth != 1) || (map->length != 256)) {
298 fb_err(info, "unsupported font parameters: width %d, height %d, depth %d, length %d\n",
299 map->width, map->height, map->depth, map->length);
300 return;
301 }
302
303 fb += 2;
304 for (i = 0; i < map->height; i++) {
305 for (c = 0; c < map->length; c++) {
306 fb_writeb(font[c * map->height + i], fb + c * 4);
307 }
308 fb += 1024;
309 }
310 }
311
s3fb_tilecursor(struct fb_info * info,struct fb_tilecursor * cursor)312 static void s3fb_tilecursor(struct fb_info *info, struct fb_tilecursor *cursor)
313 {
314 struct s3fb_info *par = info->par;
315
316 svga_tilecursor(par->state.vgabase, info, cursor);
317 }
318
319 static struct fb_tile_ops s3fb_tile_ops = {
320 .fb_settile = svga_settile,
321 .fb_tilecopy = svga_tilecopy,
322 .fb_tilefill = svga_tilefill,
323 .fb_tileblit = svga_tileblit,
324 .fb_tilecursor = s3fb_tilecursor,
325 .fb_get_tilemax = svga_get_tilemax,
326 };
327
328 static struct fb_tile_ops s3fb_fast_tile_ops = {
329 .fb_settile = s3fb_settile_fast,
330 .fb_tilecopy = svga_tilecopy,
331 .fb_tilefill = svga_tilefill,
332 .fb_tileblit = svga_tileblit,
333 .fb_tilecursor = s3fb_tilecursor,
334 .fb_get_tilemax = svga_get_tilemax,
335 };
336
337
338 /* ------------------------------------------------------------------------- */
339
340 /* image data is MSB-first, fb structure is MSB-first too */
expand_color(u32 c)341 static inline u32 expand_color(u32 c)
342 {
343 return ((c & 1) | ((c & 2) << 7) | ((c & 4) << 14) | ((c & 8) << 21)) * 0xFF;
344 }
345
346 /* s3fb_iplan_imageblit silently assumes that almost everything is 8-pixel aligned */
s3fb_iplan_imageblit(struct fb_info * info,const struct fb_image * image)347 static void s3fb_iplan_imageblit(struct fb_info *info, const struct fb_image *image)
348 {
349 u32 fg = expand_color(image->fg_color);
350 u32 bg = expand_color(image->bg_color);
351 const u8 *src1, *src;
352 u8 __iomem *dst1;
353 u32 __iomem *dst;
354 u32 val;
355 int x, y;
356
357 src1 = image->data;
358 dst1 = info->screen_base + (image->dy * info->fix.line_length)
359 + ((image->dx / 8) * 4);
360
361 for (y = 0; y < image->height; y++) {
362 src = src1;
363 dst = (u32 __iomem *) dst1;
364 for (x = 0; x < image->width; x += 8) {
365 val = *(src++) * 0x01010101;
366 val = (val & fg) | (~val & bg);
367 fb_writel(val, dst++);
368 }
369 src1 += image->width / 8;
370 dst1 += info->fix.line_length;
371 }
372
373 }
374
375 /* s3fb_iplan_fillrect silently assumes that almost everything is 8-pixel aligned */
s3fb_iplan_fillrect(struct fb_info * info,const struct fb_fillrect * rect)376 static void s3fb_iplan_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
377 {
378 u32 fg = expand_color(rect->color);
379 u8 __iomem *dst1;
380 u32 __iomem *dst;
381 int x, y;
382
383 dst1 = info->screen_base + (rect->dy * info->fix.line_length)
384 + ((rect->dx / 8) * 4);
385
386 for (y = 0; y < rect->height; y++) {
387 dst = (u32 __iomem *) dst1;
388 for (x = 0; x < rect->width; x += 8) {
389 fb_writel(fg, dst++);
390 }
391 dst1 += info->fix.line_length;
392 }
393 }
394
395
396 /* image data is MSB-first, fb structure is high-nibble-in-low-byte-first */
expand_pixel(u32 c)397 static inline u32 expand_pixel(u32 c)
398 {
399 return (((c & 1) << 24) | ((c & 2) << 27) | ((c & 4) << 14) | ((c & 8) << 17) |
400 ((c & 16) << 4) | ((c & 32) << 7) | ((c & 64) >> 6) | ((c & 128) >> 3)) * 0xF;
401 }
402
403 /* s3fb_cfb4_imageblit silently assumes that almost everything is 8-pixel aligned */
s3fb_cfb4_imageblit(struct fb_info * info,const struct fb_image * image)404 static void s3fb_cfb4_imageblit(struct fb_info *info, const struct fb_image *image)
405 {
406 u32 fg = image->fg_color * 0x11111111;
407 u32 bg = image->bg_color * 0x11111111;
408 const u8 *src1, *src;
409 u8 __iomem *dst1;
410 u32 __iomem *dst;
411 u32 val;
412 int x, y;
413
414 src1 = image->data;
415 dst1 = info->screen_base + (image->dy * info->fix.line_length)
416 + ((image->dx / 8) * 4);
417
418 for (y = 0; y < image->height; y++) {
419 src = src1;
420 dst = (u32 __iomem *) dst1;
421 for (x = 0; x < image->width; x += 8) {
422 val = expand_pixel(*(src++));
423 val = (val & fg) | (~val & bg);
424 fb_writel(val, dst++);
425 }
426 src1 += image->width / 8;
427 dst1 += info->fix.line_length;
428 }
429 }
430
s3fb_imageblit(struct fb_info * info,const struct fb_image * image)431 static void s3fb_imageblit(struct fb_info *info, const struct fb_image *image)
432 {
433 if ((info->var.bits_per_pixel == 4) && (image->depth == 1)
434 && ((image->width % 8) == 0) && ((image->dx % 8) == 0)) {
435 if (info->fix.type == FB_TYPE_INTERLEAVED_PLANES)
436 s3fb_iplan_imageblit(info, image);
437 else
438 s3fb_cfb4_imageblit(info, image);
439 } else
440 cfb_imageblit(info, image);
441 }
442
s3fb_fillrect(struct fb_info * info,const struct fb_fillrect * rect)443 static void s3fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
444 {
445 if ((info->var.bits_per_pixel == 4)
446 && ((rect->width % 8) == 0) && ((rect->dx % 8) == 0)
447 && (info->fix.type == FB_TYPE_INTERLEAVED_PLANES))
448 s3fb_iplan_fillrect(info, rect);
449 else
450 cfb_fillrect(info, rect);
451 }
452
453
454
455 /* ------------------------------------------------------------------------- */
456
457
s3_set_pixclock(struct fb_info * info,u32 pixclock)458 static void s3_set_pixclock(struct fb_info *info, u32 pixclock)
459 {
460 struct s3fb_info *par = info->par;
461 u16 m, n, r;
462 u8 regval;
463 int rv;
464
465 rv = svga_compute_pll((par->chip == CHIP_365_TRIO3D) ? &s3_trio3d_pll : &s3_pll,
466 1000000000 / pixclock, &m, &n, &r, info->node);
467 if (rv < 0) {
468 fb_err(info, "cannot set requested pixclock, keeping old value\n");
469 return;
470 }
471
472 /* Set VGA misc register */
473 regval = vga_r(par->state.vgabase, VGA_MIS_R);
474 vga_w(par->state.vgabase, VGA_MIS_W, regval | VGA_MIS_ENB_PLL_LOAD);
475
476 /* Set S3 clock registers */
477 if (par->chip == CHIP_357_VIRGE_GX2 ||
478 par->chip == CHIP_359_VIRGE_GX2P ||
479 par->chip == CHIP_360_TRIO3D_1X ||
480 par->chip == CHIP_362_TRIO3D_2X ||
481 par->chip == CHIP_368_TRIO3D_2X ||
482 par->chip == CHIP_260_VIRGE_MX) {
483 vga_wseq(par->state.vgabase, 0x12, (n - 2) | ((r & 3) << 6)); /* n and two bits of r */
484 vga_wseq(par->state.vgabase, 0x29, r >> 2); /* remaining highest bit of r */
485 } else
486 vga_wseq(par->state.vgabase, 0x12, (n - 2) | (r << 5));
487 vga_wseq(par->state.vgabase, 0x13, m - 2);
488
489 udelay(1000);
490
491 /* Activate clock - write 0, 1, 0 to seq/15 bit 5 */
492 regval = vga_rseq (par->state.vgabase, 0x15); /* | 0x80; */
493 vga_wseq(par->state.vgabase, 0x15, regval & ~(1<<5));
494 vga_wseq(par->state.vgabase, 0x15, regval | (1<<5));
495 vga_wseq(par->state.vgabase, 0x15, regval & ~(1<<5));
496 }
497
498
499 /* Open framebuffer */
500
s3fb_open(struct fb_info * info,int user)501 static int s3fb_open(struct fb_info *info, int user)
502 {
503 struct s3fb_info *par = info->par;
504
505 mutex_lock(&(par->open_lock));
506 if (par->ref_count == 0) {
507 void __iomem *vgabase = par->state.vgabase;
508
509 memset(&(par->state), 0, sizeof(struct vgastate));
510 par->state.vgabase = vgabase;
511 par->state.flags = VGA_SAVE_MODE | VGA_SAVE_FONTS | VGA_SAVE_CMAP;
512 par->state.num_crtc = 0x70;
513 par->state.num_seq = 0x20;
514 save_vga(&(par->state));
515 }
516
517 par->ref_count++;
518 mutex_unlock(&(par->open_lock));
519
520 return 0;
521 }
522
523 /* Close framebuffer */
524
s3fb_release(struct fb_info * info,int user)525 static int s3fb_release(struct fb_info *info, int user)
526 {
527 struct s3fb_info *par = info->par;
528
529 mutex_lock(&(par->open_lock));
530 if (par->ref_count == 0) {
531 mutex_unlock(&(par->open_lock));
532 return -EINVAL;
533 }
534
535 if (par->ref_count == 1)
536 restore_vga(&(par->state));
537
538 par->ref_count--;
539 mutex_unlock(&(par->open_lock));
540
541 return 0;
542 }
543
544 /* Validate passed in var */
545
s3fb_check_var(struct fb_var_screeninfo * var,struct fb_info * info)546 static int s3fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
547 {
548 struct s3fb_info *par = info->par;
549 int rv, mem, step;
550 u16 m, n, r;
551
552 /* Find appropriate format */
553 rv = svga_match_format (s3fb_formats, var, NULL);
554
555 /* 32bpp mode is not supported on VIRGE VX,
556 24bpp is not supported on others */
557 if ((par->chip == CHIP_988_VIRGE_VX) ? (rv == 7) : (rv == 6))
558 rv = -EINVAL;
559
560 if (rv < 0) {
561 fb_err(info, "unsupported mode requested\n");
562 return rv;
563 }
564
565 /* Do not allow to have real resoulution larger than virtual */
566 if (var->xres > var->xres_virtual)
567 var->xres_virtual = var->xres;
568
569 if (var->yres > var->yres_virtual)
570 var->yres_virtual = var->yres;
571
572 /* Round up xres_virtual to have proper alignment of lines */
573 step = s3fb_formats[rv].xresstep - 1;
574 var->xres_virtual = (var->xres_virtual+step) & ~step;
575
576 /* Check whether have enough memory */
577 mem = ((var->bits_per_pixel * var->xres_virtual) >> 3) * var->yres_virtual;
578 if (mem > info->screen_size) {
579 fb_err(info, "not enough framebuffer memory (%d kB requested , %u kB available)\n",
580 mem >> 10, (unsigned int) (info->screen_size >> 10));
581 return -EINVAL;
582 }
583
584 rv = svga_check_timings (&s3_timing_regs, var, info->node);
585 if (rv < 0) {
586 fb_err(info, "invalid timings requested\n");
587 return rv;
588 }
589
590 rv = svga_compute_pll(&s3_pll, PICOS2KHZ(var->pixclock), &m, &n, &r,
591 info->node);
592 if (rv < 0) {
593 fb_err(info, "invalid pixclock value requested\n");
594 return rv;
595 }
596
597 return 0;
598 }
599
600 /* Set video mode from par */
601
s3fb_set_par(struct fb_info * info)602 static int s3fb_set_par(struct fb_info *info)
603 {
604 struct s3fb_info *par = info->par;
605 u32 value, mode, hmul, offset_value, screen_size, multiplex, dbytes;
606 u32 bpp = info->var.bits_per_pixel;
607 u32 htotal, hsstart;
608
609 if (bpp != 0) {
610 info->fix.ypanstep = 1;
611 info->fix.line_length = (info->var.xres_virtual * bpp) / 8;
612
613 info->flags &= ~FBINFO_MISC_TILEBLITTING;
614 info->tileops = NULL;
615
616 /* in 4bpp supports 8p wide tiles only, any tiles otherwise */
617 info->pixmap.blit_x = (bpp == 4) ? (1 << (8 - 1)) : (~(u32)0);
618 info->pixmap.blit_y = ~(u32)0;
619
620 offset_value = (info->var.xres_virtual * bpp) / 64;
621 screen_size = info->var.yres_virtual * info->fix.line_length;
622 } else {
623 info->fix.ypanstep = 16;
624 info->fix.line_length = 0;
625
626 info->flags |= FBINFO_MISC_TILEBLITTING;
627 info->tileops = fasttext ? &s3fb_fast_tile_ops : &s3fb_tile_ops;
628
629 /* supports 8x16 tiles only */
630 info->pixmap.blit_x = 1 << (8 - 1);
631 info->pixmap.blit_y = 1 << (16 - 1);
632
633 offset_value = info->var.xres_virtual / 16;
634 screen_size = (info->var.xres_virtual * info->var.yres_virtual) / 64;
635 }
636
637 info->var.xoffset = 0;
638 info->var.yoffset = 0;
639 info->var.activate = FB_ACTIVATE_NOW;
640
641 /* Unlock registers */
642 vga_wcrt(par->state.vgabase, 0x38, 0x48);
643 vga_wcrt(par->state.vgabase, 0x39, 0xA5);
644 vga_wseq(par->state.vgabase, 0x08, 0x06);
645 svga_wcrt_mask(par->state.vgabase, 0x11, 0x00, 0x80);
646
647 /* Blank screen and turn off sync */
648 svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
649 svga_wcrt_mask(par->state.vgabase, 0x17, 0x00, 0x80);
650
651 /* Set default values */
652 svga_set_default_gfx_regs(par->state.vgabase);
653 svga_set_default_atc_regs(par->state.vgabase);
654 svga_set_default_seq_regs(par->state.vgabase);
655 svga_set_default_crt_regs(par->state.vgabase);
656 svga_wcrt_multi(par->state.vgabase, s3_line_compare_regs, 0xFFFFFFFF);
657 svga_wcrt_multi(par->state.vgabase, s3_start_address_regs, 0);
658
659 /* S3 specific initialization */
660 svga_wcrt_mask(par->state.vgabase, 0x58, 0x10, 0x10); /* enable linear framebuffer */
661 svga_wcrt_mask(par->state.vgabase, 0x31, 0x08, 0x08); /* enable sequencer access to framebuffer above 256 kB */
662
663 /* svga_wcrt_mask(par->state.vgabase, 0x33, 0x08, 0x08); */ /* DDR ? */
664 /* svga_wcrt_mask(par->state.vgabase, 0x43, 0x01, 0x01); */ /* DDR ? */
665 svga_wcrt_mask(par->state.vgabase, 0x33, 0x00, 0x08); /* no DDR ? */
666 svga_wcrt_mask(par->state.vgabase, 0x43, 0x00, 0x01); /* no DDR ? */
667
668 svga_wcrt_mask(par->state.vgabase, 0x5D, 0x00, 0x28); /* Clear strange HSlen bits */
669
670 /* svga_wcrt_mask(par->state.vgabase, 0x58, 0x03, 0x03); */
671
672 /* svga_wcrt_mask(par->state.vgabase, 0x53, 0x12, 0x13); */ /* enable MMIO */
673 /* svga_wcrt_mask(par->state.vgabase, 0x40, 0x08, 0x08); */ /* enable write buffer */
674
675
676 /* Set the offset register */
677 fb_dbg(info, "offset register : %d\n", offset_value);
678 svga_wcrt_multi(par->state.vgabase, s3_offset_regs, offset_value);
679
680 if (par->chip != CHIP_357_VIRGE_GX2 &&
681 par->chip != CHIP_359_VIRGE_GX2P &&
682 par->chip != CHIP_360_TRIO3D_1X &&
683 par->chip != CHIP_362_TRIO3D_2X &&
684 par->chip != CHIP_368_TRIO3D_2X &&
685 par->chip != CHIP_260_VIRGE_MX) {
686 vga_wcrt(par->state.vgabase, 0x54, 0x18); /* M parameter */
687 vga_wcrt(par->state.vgabase, 0x60, 0xff); /* N parameter */
688 vga_wcrt(par->state.vgabase, 0x61, 0xff); /* L parameter */
689 vga_wcrt(par->state.vgabase, 0x62, 0xff); /* L parameter */
690 }
691
692 vga_wcrt(par->state.vgabase, 0x3A, 0x35);
693 svga_wattr(par->state.vgabase, 0x33, 0x00);
694
695 if (info->var.vmode & FB_VMODE_DOUBLE)
696 svga_wcrt_mask(par->state.vgabase, 0x09, 0x80, 0x80);
697 else
698 svga_wcrt_mask(par->state.vgabase, 0x09, 0x00, 0x80);
699
700 if (info->var.vmode & FB_VMODE_INTERLACED)
701 svga_wcrt_mask(par->state.vgabase, 0x42, 0x20, 0x20);
702 else
703 svga_wcrt_mask(par->state.vgabase, 0x42, 0x00, 0x20);
704
705 /* Disable hardware graphics cursor */
706 svga_wcrt_mask(par->state.vgabase, 0x45, 0x00, 0x01);
707 /* Disable Streams engine */
708 svga_wcrt_mask(par->state.vgabase, 0x67, 0x00, 0x0C);
709
710 mode = svga_match_format(s3fb_formats, &(info->var), &(info->fix));
711
712 /* S3 virge DX hack */
713 if (par->chip == CHIP_375_VIRGE_DX) {
714 vga_wcrt(par->state.vgabase, 0x86, 0x80);
715 vga_wcrt(par->state.vgabase, 0x90, 0x00);
716 }
717
718 /* S3 virge VX hack */
719 if (par->chip == CHIP_988_VIRGE_VX) {
720 vga_wcrt(par->state.vgabase, 0x50, 0x00);
721 vga_wcrt(par->state.vgabase, 0x67, 0x50);
722 msleep(10); /* screen remains blank sometimes without this */
723 vga_wcrt(par->state.vgabase, 0x63, (mode <= 2) ? 0x90 : 0x09);
724 vga_wcrt(par->state.vgabase, 0x66, 0x90);
725 }
726
727 if (par->chip == CHIP_357_VIRGE_GX2 ||
728 par->chip == CHIP_359_VIRGE_GX2P ||
729 par->chip == CHIP_360_TRIO3D_1X ||
730 par->chip == CHIP_362_TRIO3D_2X ||
731 par->chip == CHIP_368_TRIO3D_2X ||
732 par->chip == CHIP_365_TRIO3D ||
733 par->chip == CHIP_375_VIRGE_DX ||
734 par->chip == CHIP_385_VIRGE_GX ||
735 par->chip == CHIP_260_VIRGE_MX) {
736 dbytes = info->var.xres * ((bpp+7)/8);
737 vga_wcrt(par->state.vgabase, 0x91, (dbytes + 7) / 8);
738 vga_wcrt(par->state.vgabase, 0x90, (((dbytes + 7) / 8) >> 8) | 0x80);
739
740 vga_wcrt(par->state.vgabase, 0x66, 0x81);
741 }
742
743 if (par->chip == CHIP_357_VIRGE_GX2 ||
744 par->chip == CHIP_359_VIRGE_GX2P ||
745 par->chip == CHIP_360_TRIO3D_1X ||
746 par->chip == CHIP_362_TRIO3D_2X ||
747 par->chip == CHIP_368_TRIO3D_2X ||
748 par->chip == CHIP_260_VIRGE_MX)
749 vga_wcrt(par->state.vgabase, 0x34, 0x00);
750 else /* enable Data Transfer Position Control (DTPC) */
751 vga_wcrt(par->state.vgabase, 0x34, 0x10);
752
753 svga_wcrt_mask(par->state.vgabase, 0x31, 0x00, 0x40);
754 multiplex = 0;
755 hmul = 1;
756
757 /* Set mode-specific register values */
758 switch (mode) {
759 case 0:
760 fb_dbg(info, "text mode\n");
761 svga_set_textmode_vga_regs(par->state.vgabase);
762
763 /* Set additional registers like in 8-bit mode */
764 svga_wcrt_mask(par->state.vgabase, 0x50, 0x00, 0x30);
765 svga_wcrt_mask(par->state.vgabase, 0x67, 0x00, 0xF0);
766
767 /* Disable enhanced mode */
768 svga_wcrt_mask(par->state.vgabase, 0x3A, 0x00, 0x30);
769
770 if (fasttext) {
771 fb_dbg(info, "high speed text mode set\n");
772 svga_wcrt_mask(par->state.vgabase, 0x31, 0x40, 0x40);
773 }
774 break;
775 case 1:
776 fb_dbg(info, "4 bit pseudocolor\n");
777 vga_wgfx(par->state.vgabase, VGA_GFX_MODE, 0x40);
778
779 /* Set additional registers like in 8-bit mode */
780 svga_wcrt_mask(par->state.vgabase, 0x50, 0x00, 0x30);
781 svga_wcrt_mask(par->state.vgabase, 0x67, 0x00, 0xF0);
782
783 /* disable enhanced mode */
784 svga_wcrt_mask(par->state.vgabase, 0x3A, 0x00, 0x30);
785 break;
786 case 2:
787 fb_dbg(info, "4 bit pseudocolor, planar\n");
788
789 /* Set additional registers like in 8-bit mode */
790 svga_wcrt_mask(par->state.vgabase, 0x50, 0x00, 0x30);
791 svga_wcrt_mask(par->state.vgabase, 0x67, 0x00, 0xF0);
792
793 /* disable enhanced mode */
794 svga_wcrt_mask(par->state.vgabase, 0x3A, 0x00, 0x30);
795 break;
796 case 3:
797 fb_dbg(info, "8 bit pseudocolor\n");
798 svga_wcrt_mask(par->state.vgabase, 0x50, 0x00, 0x30);
799 if (info->var.pixclock > 20000 ||
800 par->chip == CHIP_357_VIRGE_GX2 ||
801 par->chip == CHIP_359_VIRGE_GX2P ||
802 par->chip == CHIP_360_TRIO3D_1X ||
803 par->chip == CHIP_362_TRIO3D_2X ||
804 par->chip == CHIP_368_TRIO3D_2X ||
805 par->chip == CHIP_260_VIRGE_MX)
806 svga_wcrt_mask(par->state.vgabase, 0x67, 0x00, 0xF0);
807 else {
808 svga_wcrt_mask(par->state.vgabase, 0x67, 0x10, 0xF0);
809 multiplex = 1;
810 }
811 break;
812 case 4:
813 fb_dbg(info, "5/5/5 truecolor\n");
814 if (par->chip == CHIP_988_VIRGE_VX) {
815 if (info->var.pixclock > 20000)
816 svga_wcrt_mask(par->state.vgabase, 0x67, 0x20, 0xF0);
817 else
818 svga_wcrt_mask(par->state.vgabase, 0x67, 0x30, 0xF0);
819 } else if (par->chip == CHIP_365_TRIO3D) {
820 svga_wcrt_mask(par->state.vgabase, 0x50, 0x10, 0x30);
821 if (info->var.pixclock > 8695) {
822 svga_wcrt_mask(par->state.vgabase, 0x67, 0x30, 0xF0);
823 hmul = 2;
824 } else {
825 svga_wcrt_mask(par->state.vgabase, 0x67, 0x20, 0xF0);
826 multiplex = 1;
827 }
828 } else {
829 svga_wcrt_mask(par->state.vgabase, 0x50, 0x10, 0x30);
830 svga_wcrt_mask(par->state.vgabase, 0x67, 0x30, 0xF0);
831 if (par->chip != CHIP_357_VIRGE_GX2 &&
832 par->chip != CHIP_359_VIRGE_GX2P &&
833 par->chip != CHIP_360_TRIO3D_1X &&
834 par->chip != CHIP_362_TRIO3D_2X &&
835 par->chip != CHIP_368_TRIO3D_2X &&
836 par->chip != CHIP_260_VIRGE_MX)
837 hmul = 2;
838 }
839 break;
840 case 5:
841 fb_dbg(info, "5/6/5 truecolor\n");
842 if (par->chip == CHIP_988_VIRGE_VX) {
843 if (info->var.pixclock > 20000)
844 svga_wcrt_mask(par->state.vgabase, 0x67, 0x40, 0xF0);
845 else
846 svga_wcrt_mask(par->state.vgabase, 0x67, 0x50, 0xF0);
847 } else if (par->chip == CHIP_365_TRIO3D) {
848 svga_wcrt_mask(par->state.vgabase, 0x50, 0x10, 0x30);
849 if (info->var.pixclock > 8695) {
850 svga_wcrt_mask(par->state.vgabase, 0x67, 0x50, 0xF0);
851 hmul = 2;
852 } else {
853 svga_wcrt_mask(par->state.vgabase, 0x67, 0x40, 0xF0);
854 multiplex = 1;
855 }
856 } else {
857 svga_wcrt_mask(par->state.vgabase, 0x50, 0x10, 0x30);
858 svga_wcrt_mask(par->state.vgabase, 0x67, 0x50, 0xF0);
859 if (par->chip != CHIP_357_VIRGE_GX2 &&
860 par->chip != CHIP_359_VIRGE_GX2P &&
861 par->chip != CHIP_360_TRIO3D_1X &&
862 par->chip != CHIP_362_TRIO3D_2X &&
863 par->chip != CHIP_368_TRIO3D_2X &&
864 par->chip != CHIP_260_VIRGE_MX)
865 hmul = 2;
866 }
867 break;
868 case 6:
869 /* VIRGE VX case */
870 fb_dbg(info, "8/8/8 truecolor\n");
871 svga_wcrt_mask(par->state.vgabase, 0x67, 0xD0, 0xF0);
872 break;
873 case 7:
874 fb_dbg(info, "8/8/8/8 truecolor\n");
875 svga_wcrt_mask(par->state.vgabase, 0x50, 0x30, 0x30);
876 svga_wcrt_mask(par->state.vgabase, 0x67, 0xD0, 0xF0);
877 break;
878 default:
879 fb_err(info, "unsupported mode - bug\n");
880 return -EINVAL;
881 }
882
883 if (par->chip != CHIP_988_VIRGE_VX) {
884 svga_wseq_mask(par->state.vgabase, 0x15, multiplex ? 0x10 : 0x00, 0x10);
885 svga_wseq_mask(par->state.vgabase, 0x18, multiplex ? 0x80 : 0x00, 0x80);
886 }
887
888 s3_set_pixclock(info, info->var.pixclock);
889 svga_set_timings(par->state.vgabase, &s3_timing_regs, &(info->var), hmul, 1,
890 (info->var.vmode & FB_VMODE_DOUBLE) ? 2 : 1,
891 (info->var.vmode & FB_VMODE_INTERLACED) ? 2 : 1,
892 hmul, info->node);
893
894 /* Set interlaced mode start/end register */
895 htotal = info->var.xres + info->var.left_margin + info->var.right_margin + info->var.hsync_len;
896 htotal = ((htotal * hmul) / 8) - 5;
897 vga_wcrt(par->state.vgabase, 0x3C, (htotal + 1) / 2);
898
899 /* Set Data Transfer Position */
900 hsstart = ((info->var.xres + info->var.right_margin) * hmul) / 8;
901 /* + 2 is needed for Virge/VX, does no harm on other cards */
902 value = clamp((htotal + hsstart + 1) / 2 + 2, hsstart + 4, htotal + 1);
903 svga_wcrt_multi(par->state.vgabase, s3_dtpc_regs, value);
904
905 memset_io(info->screen_base, 0x00, screen_size);
906 /* Device and screen back on */
907 svga_wcrt_mask(par->state.vgabase, 0x17, 0x80, 0x80);
908 svga_wseq_mask(par->state.vgabase, 0x01, 0x00, 0x20);
909
910 return 0;
911 }
912
913 /* Set a colour register */
914
s3fb_setcolreg(u_int regno,u_int red,u_int green,u_int blue,u_int transp,struct fb_info * fb)915 static int s3fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
916 u_int transp, struct fb_info *fb)
917 {
918 switch (fb->var.bits_per_pixel) {
919 case 0:
920 case 4:
921 if (regno >= 16)
922 return -EINVAL;
923
924 if ((fb->var.bits_per_pixel == 4) &&
925 (fb->var.nonstd == 0)) {
926 outb(0xF0, VGA_PEL_MSK);
927 outb(regno*16, VGA_PEL_IW);
928 } else {
929 outb(0x0F, VGA_PEL_MSK);
930 outb(regno, VGA_PEL_IW);
931 }
932 outb(red >> 10, VGA_PEL_D);
933 outb(green >> 10, VGA_PEL_D);
934 outb(blue >> 10, VGA_PEL_D);
935 break;
936 case 8:
937 if (regno >= 256)
938 return -EINVAL;
939
940 outb(0xFF, VGA_PEL_MSK);
941 outb(regno, VGA_PEL_IW);
942 outb(red >> 10, VGA_PEL_D);
943 outb(green >> 10, VGA_PEL_D);
944 outb(blue >> 10, VGA_PEL_D);
945 break;
946 case 16:
947 if (regno >= 16)
948 return 0;
949
950 if (fb->var.green.length == 5)
951 ((u32*)fb->pseudo_palette)[regno] = ((red & 0xF800) >> 1) |
952 ((green & 0xF800) >> 6) | ((blue & 0xF800) >> 11);
953 else if (fb->var.green.length == 6)
954 ((u32*)fb->pseudo_palette)[regno] = (red & 0xF800) |
955 ((green & 0xFC00) >> 5) | ((blue & 0xF800) >> 11);
956 else return -EINVAL;
957 break;
958 case 24:
959 case 32:
960 if (regno >= 16)
961 return 0;
962
963 ((u32*)fb->pseudo_palette)[regno] = ((red & 0xFF00) << 8) |
964 (green & 0xFF00) | ((blue & 0xFF00) >> 8);
965 break;
966 default:
967 return -EINVAL;
968 }
969
970 return 0;
971 }
972
973
974 /* Set the display blanking state */
975
s3fb_blank(int blank_mode,struct fb_info * info)976 static int s3fb_blank(int blank_mode, struct fb_info *info)
977 {
978 struct s3fb_info *par = info->par;
979
980 switch (blank_mode) {
981 case FB_BLANK_UNBLANK:
982 fb_dbg(info, "unblank\n");
983 svga_wcrt_mask(par->state.vgabase, 0x56, 0x00, 0x06);
984 svga_wseq_mask(par->state.vgabase, 0x01, 0x00, 0x20);
985 break;
986 case FB_BLANK_NORMAL:
987 fb_dbg(info, "blank\n");
988 svga_wcrt_mask(par->state.vgabase, 0x56, 0x00, 0x06);
989 svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
990 break;
991 case FB_BLANK_HSYNC_SUSPEND:
992 fb_dbg(info, "hsync\n");
993 svga_wcrt_mask(par->state.vgabase, 0x56, 0x02, 0x06);
994 svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
995 break;
996 case FB_BLANK_VSYNC_SUSPEND:
997 fb_dbg(info, "vsync\n");
998 svga_wcrt_mask(par->state.vgabase, 0x56, 0x04, 0x06);
999 svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
1000 break;
1001 case FB_BLANK_POWERDOWN:
1002 fb_dbg(info, "sync down\n");
1003 svga_wcrt_mask(par->state.vgabase, 0x56, 0x06, 0x06);
1004 svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
1005 break;
1006 }
1007
1008 return 0;
1009 }
1010
1011
1012 /* Pan the display */
1013
s3fb_pan_display(struct fb_var_screeninfo * var,struct fb_info * info)1014 static int s3fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
1015 {
1016 struct s3fb_info *par = info->par;
1017 unsigned int offset;
1018
1019 /* Calculate the offset */
1020 if (info->var.bits_per_pixel == 0) {
1021 offset = (var->yoffset / 16) * (info->var.xres_virtual / 2)
1022 + (var->xoffset / 2);
1023 offset = offset >> 2;
1024 } else {
1025 offset = (var->yoffset * info->fix.line_length) +
1026 (var->xoffset * info->var.bits_per_pixel / 8);
1027 offset = offset >> 2;
1028 }
1029
1030 /* Set the offset */
1031 svga_wcrt_multi(par->state.vgabase, s3_start_address_regs, offset);
1032
1033 return 0;
1034 }
1035
1036 /* ------------------------------------------------------------------------- */
1037
1038 /* Frame buffer operations */
1039
1040 static struct fb_ops s3fb_ops = {
1041 .owner = THIS_MODULE,
1042 .fb_open = s3fb_open,
1043 .fb_release = s3fb_release,
1044 .fb_check_var = s3fb_check_var,
1045 .fb_set_par = s3fb_set_par,
1046 .fb_setcolreg = s3fb_setcolreg,
1047 .fb_blank = s3fb_blank,
1048 .fb_pan_display = s3fb_pan_display,
1049 .fb_fillrect = s3fb_fillrect,
1050 .fb_copyarea = cfb_copyarea,
1051 .fb_imageblit = s3fb_imageblit,
1052 .fb_get_caps = svga_get_caps,
1053 };
1054
1055 /* ------------------------------------------------------------------------- */
1056
s3_identification(struct s3fb_info * par)1057 static int s3_identification(struct s3fb_info *par)
1058 {
1059 int chip = par->chip;
1060
1061 if (chip == CHIP_XXX_TRIO) {
1062 u8 cr30 = vga_rcrt(par->state.vgabase, 0x30);
1063 u8 cr2e = vga_rcrt(par->state.vgabase, 0x2e);
1064 u8 cr2f = vga_rcrt(par->state.vgabase, 0x2f);
1065
1066 if ((cr30 == 0xE0) || (cr30 == 0xE1)) {
1067 if (cr2e == 0x10)
1068 return CHIP_732_TRIO32;
1069 if (cr2e == 0x11) {
1070 if (! (cr2f & 0x40))
1071 return CHIP_764_TRIO64;
1072 else
1073 return CHIP_765_TRIO64VP;
1074 }
1075 }
1076 }
1077
1078 if (chip == CHIP_XXX_TRIO64V2_DXGX) {
1079 u8 cr6f = vga_rcrt(par->state.vgabase, 0x6f);
1080
1081 if (! (cr6f & 0x01))
1082 return CHIP_775_TRIO64V2_DX;
1083 else
1084 return CHIP_785_TRIO64V2_GX;
1085 }
1086
1087 if (chip == CHIP_XXX_VIRGE_DXGX) {
1088 u8 cr6f = vga_rcrt(par->state.vgabase, 0x6f);
1089
1090 if (! (cr6f & 0x01))
1091 return CHIP_375_VIRGE_DX;
1092 else
1093 return CHIP_385_VIRGE_GX;
1094 }
1095
1096 if (chip == CHIP_36X_TRIO3D_1X_2X) {
1097 switch (vga_rcrt(par->state.vgabase, 0x2f)) {
1098 case 0x00:
1099 return CHIP_360_TRIO3D_1X;
1100 case 0x01:
1101 return CHIP_362_TRIO3D_2X;
1102 case 0x02:
1103 return CHIP_368_TRIO3D_2X;
1104 }
1105 }
1106
1107 return CHIP_UNKNOWN;
1108 }
1109
1110
1111 /* PCI probe */
1112
s3_pci_probe(struct pci_dev * dev,const struct pci_device_id * id)1113 static int s3_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
1114 {
1115 struct pci_bus_region bus_reg;
1116 struct resource vga_res;
1117 struct fb_info *info;
1118 struct s3fb_info *par;
1119 int rc;
1120 u8 regval, cr38, cr39;
1121 bool found = false;
1122
1123 /* Ignore secondary VGA device because there is no VGA arbitration */
1124 if (! svga_primary_device(dev)) {
1125 dev_info(&(dev->dev), "ignoring secondary device\n");
1126 return -ENODEV;
1127 }
1128
1129 /* Allocate and fill driver data structure */
1130 info = framebuffer_alloc(sizeof(struct s3fb_info), &(dev->dev));
1131 if (!info)
1132 return -ENOMEM;
1133
1134 par = info->par;
1135 mutex_init(&par->open_lock);
1136
1137 info->flags = FBINFO_PARTIAL_PAN_OK | FBINFO_HWACCEL_YPAN;
1138 info->fbops = &s3fb_ops;
1139
1140 /* Prepare PCI device */
1141 rc = pci_enable_device(dev);
1142 if (rc < 0) {
1143 dev_err(info->device, "cannot enable PCI device\n");
1144 goto err_enable_device;
1145 }
1146
1147 rc = pci_request_regions(dev, "s3fb");
1148 if (rc < 0) {
1149 dev_err(info->device, "cannot reserve framebuffer region\n");
1150 goto err_request_regions;
1151 }
1152
1153
1154 info->fix.smem_start = pci_resource_start(dev, 0);
1155 info->fix.smem_len = pci_resource_len(dev, 0);
1156
1157 /* Map physical IO memory address into kernel space */
1158 info->screen_base = pci_iomap_wc(dev, 0, 0);
1159 if (! info->screen_base) {
1160 rc = -ENOMEM;
1161 dev_err(info->device, "iomap for framebuffer failed\n");
1162 goto err_iomap;
1163 }
1164
1165 bus_reg.start = 0;
1166 bus_reg.end = 64 * 1024;
1167
1168 vga_res.flags = IORESOURCE_IO;
1169
1170 pcibios_bus_to_resource(dev->bus, &vga_res, &bus_reg);
1171
1172 par->state.vgabase = (void __iomem *) (unsigned long) vga_res.start;
1173
1174 /* Unlock regs */
1175 cr38 = vga_rcrt(par->state.vgabase, 0x38);
1176 cr39 = vga_rcrt(par->state.vgabase, 0x39);
1177 vga_wseq(par->state.vgabase, 0x08, 0x06);
1178 vga_wcrt(par->state.vgabase, 0x38, 0x48);
1179 vga_wcrt(par->state.vgabase, 0x39, 0xA5);
1180
1181 /* Identify chip type */
1182 par->chip = id->driver_data & CHIP_MASK;
1183 par->rev = vga_rcrt(par->state.vgabase, 0x2f);
1184 if (par->chip & CHIP_UNDECIDED_FLAG)
1185 par->chip = s3_identification(par);
1186
1187 /* Find how many physical memory there is on card */
1188 /* 0x36 register is accessible even if other registers are locked */
1189 regval = vga_rcrt(par->state.vgabase, 0x36);
1190 if (par->chip == CHIP_360_TRIO3D_1X ||
1191 par->chip == CHIP_362_TRIO3D_2X ||
1192 par->chip == CHIP_368_TRIO3D_2X ||
1193 par->chip == CHIP_365_TRIO3D) {
1194 switch ((regval & 0xE0) >> 5) {
1195 case 0: /* 8MB -- only 4MB usable for display */
1196 case 1: /* 4MB with 32-bit bus */
1197 case 2: /* 4MB */
1198 info->screen_size = 4 << 20;
1199 break;
1200 case 4: /* 2MB on 365 Trio3D */
1201 case 6: /* 2MB */
1202 info->screen_size = 2 << 20;
1203 break;
1204 }
1205 } else if (par->chip == CHIP_357_VIRGE_GX2 ||
1206 par->chip == CHIP_359_VIRGE_GX2P ||
1207 par->chip == CHIP_260_VIRGE_MX) {
1208 switch ((regval & 0xC0) >> 6) {
1209 case 1: /* 4MB */
1210 info->screen_size = 4 << 20;
1211 break;
1212 case 3: /* 2MB */
1213 info->screen_size = 2 << 20;
1214 break;
1215 }
1216 } else if (par->chip == CHIP_988_VIRGE_VX) {
1217 switch ((regval & 0x60) >> 5) {
1218 case 0: /* 2MB */
1219 info->screen_size = 2 << 20;
1220 break;
1221 case 1: /* 4MB */
1222 info->screen_size = 4 << 20;
1223 break;
1224 case 2: /* 6MB */
1225 info->screen_size = 6 << 20;
1226 break;
1227 case 3: /* 8MB */
1228 info->screen_size = 8 << 20;
1229 break;
1230 }
1231 /* off-screen memory */
1232 regval = vga_rcrt(par->state.vgabase, 0x37);
1233 switch ((regval & 0x60) >> 5) {
1234 case 1: /* 4MB */
1235 info->screen_size -= 4 << 20;
1236 break;
1237 case 2: /* 2MB */
1238 info->screen_size -= 2 << 20;
1239 break;
1240 }
1241 } else
1242 info->screen_size = s3_memsizes[regval >> 5] << 10;
1243 info->fix.smem_len = info->screen_size;
1244
1245 /* Find MCLK frequency */
1246 regval = vga_rseq(par->state.vgabase, 0x10);
1247 par->mclk_freq = ((vga_rseq(par->state.vgabase, 0x11) + 2) * 14318) / ((regval & 0x1F) + 2);
1248 par->mclk_freq = par->mclk_freq >> (regval >> 5);
1249
1250 /* Restore locks */
1251 vga_wcrt(par->state.vgabase, 0x38, cr38);
1252 vga_wcrt(par->state.vgabase, 0x39, cr39);
1253
1254 strcpy(info->fix.id, s3_names [par->chip]);
1255 info->fix.mmio_start = 0;
1256 info->fix.mmio_len = 0;
1257 info->fix.type = FB_TYPE_PACKED_PIXELS;
1258 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
1259 info->fix.ypanstep = 0;
1260 info->fix.accel = FB_ACCEL_NONE;
1261 info->pseudo_palette = (void*) (par->pseudo_palette);
1262 info->var.bits_per_pixel = 8;
1263
1264 #ifdef CONFIG_FB_S3_DDC
1265 /* Enable MMIO if needed */
1266 if (s3fb_ddc_needs_mmio(par->chip)) {
1267 par->mmio = ioremap(info->fix.smem_start + MMIO_OFFSET, MMIO_SIZE);
1268 if (par->mmio)
1269 svga_wcrt_mask(par->state.vgabase, 0x53, 0x08, 0x08); /* enable MMIO */
1270 else
1271 dev_err(info->device, "unable to map MMIO at 0x%lx, disabling DDC",
1272 info->fix.smem_start + MMIO_OFFSET);
1273 }
1274 if (!s3fb_ddc_needs_mmio(par->chip) || par->mmio)
1275 if (s3fb_setup_ddc_bus(info) == 0) {
1276 u8 *edid = fb_ddc_read(&par->ddc_adapter);
1277 par->ddc_registered = true;
1278 if (edid) {
1279 fb_edid_to_monspecs(edid, &info->monspecs);
1280 kfree(edid);
1281 if (!info->monspecs.modedb)
1282 dev_err(info->device, "error getting mode database\n");
1283 else {
1284 const struct fb_videomode *m;
1285
1286 fb_videomode_to_modelist(info->monspecs.modedb,
1287 info->monspecs.modedb_len,
1288 &info->modelist);
1289 m = fb_find_best_display(&info->monspecs, &info->modelist);
1290 if (m) {
1291 fb_videomode_to_var(&info->var, m);
1292 /* fill all other info->var's fields */
1293 if (s3fb_check_var(&info->var, info) == 0)
1294 found = true;
1295 }
1296 }
1297 }
1298 }
1299 #endif
1300 if (!mode_option && !found)
1301 mode_option = "640x480-8@60";
1302
1303 /* Prepare startup mode */
1304 if (mode_option) {
1305 rc = fb_find_mode(&info->var, info, mode_option,
1306 info->monspecs.modedb, info->monspecs.modedb_len,
1307 NULL, info->var.bits_per_pixel);
1308 if (!rc || rc == 4) {
1309 rc = -EINVAL;
1310 dev_err(info->device, "mode %s not found\n", mode_option);
1311 fb_destroy_modedb(info->monspecs.modedb);
1312 info->monspecs.modedb = NULL;
1313 goto err_find_mode;
1314 }
1315 }
1316
1317 fb_destroy_modedb(info->monspecs.modedb);
1318 info->monspecs.modedb = NULL;
1319
1320 /* maximize virtual vertical size for fast scrolling */
1321 info->var.yres_virtual = info->fix.smem_len * 8 /
1322 (info->var.bits_per_pixel * info->var.xres_virtual);
1323 if (info->var.yres_virtual < info->var.yres) {
1324 dev_err(info->device, "virtual vertical size smaller than real\n");
1325 rc = -EINVAL;
1326 goto err_find_mode;
1327 }
1328
1329 rc = fb_alloc_cmap(&info->cmap, 256, 0);
1330 if (rc < 0) {
1331 dev_err(info->device, "cannot allocate colormap\n");
1332 goto err_alloc_cmap;
1333 }
1334
1335 rc = register_framebuffer(info);
1336 if (rc < 0) {
1337 dev_err(info->device, "cannot register framebuffer\n");
1338 goto err_reg_fb;
1339 }
1340
1341 fb_info(info, "%s on %s, %d MB RAM, %d MHz MCLK\n",
1342 info->fix.id, pci_name(dev),
1343 info->fix.smem_len >> 20, (par->mclk_freq + 500) / 1000);
1344
1345 if (par->chip == CHIP_UNKNOWN)
1346 fb_info(info, "unknown chip, CR2D=%x, CR2E=%x, CRT2F=%x, CRT30=%x\n",
1347 vga_rcrt(par->state.vgabase, 0x2d),
1348 vga_rcrt(par->state.vgabase, 0x2e),
1349 vga_rcrt(par->state.vgabase, 0x2f),
1350 vga_rcrt(par->state.vgabase, 0x30));
1351
1352 /* Record a reference to the driver data */
1353 pci_set_drvdata(dev, info);
1354
1355 if (mtrr)
1356 par->wc_cookie = arch_phys_wc_add(info->fix.smem_start,
1357 info->fix.smem_len);
1358
1359 return 0;
1360
1361 /* Error handling */
1362 err_reg_fb:
1363 fb_dealloc_cmap(&info->cmap);
1364 err_alloc_cmap:
1365 err_find_mode:
1366 #ifdef CONFIG_FB_S3_DDC
1367 if (par->ddc_registered)
1368 i2c_del_adapter(&par->ddc_adapter);
1369 if (par->mmio)
1370 iounmap(par->mmio);
1371 #endif
1372 pci_iounmap(dev, info->screen_base);
1373 err_iomap:
1374 pci_release_regions(dev);
1375 err_request_regions:
1376 /* pci_disable_device(dev); */
1377 err_enable_device:
1378 framebuffer_release(info);
1379 return rc;
1380 }
1381
1382
1383 /* PCI remove */
1384
s3_pci_remove(struct pci_dev * dev)1385 static void s3_pci_remove(struct pci_dev *dev)
1386 {
1387 struct fb_info *info = pci_get_drvdata(dev);
1388 struct s3fb_info __maybe_unused *par;
1389
1390 if (info) {
1391 par = info->par;
1392 arch_phys_wc_del(par->wc_cookie);
1393 unregister_framebuffer(info);
1394 fb_dealloc_cmap(&info->cmap);
1395
1396 #ifdef CONFIG_FB_S3_DDC
1397 if (par->ddc_registered)
1398 i2c_del_adapter(&par->ddc_adapter);
1399 if (par->mmio)
1400 iounmap(par->mmio);
1401 #endif
1402
1403 pci_iounmap(dev, info->screen_base);
1404 pci_release_regions(dev);
1405 /* pci_disable_device(dev); */
1406
1407 framebuffer_release(info);
1408 }
1409 }
1410
1411 /* PCI suspend */
1412
s3_pci_suspend(struct pci_dev * dev,pm_message_t state)1413 static int s3_pci_suspend(struct pci_dev* dev, pm_message_t state)
1414 {
1415 struct fb_info *info = pci_get_drvdata(dev);
1416 struct s3fb_info *par = info->par;
1417
1418 dev_info(info->device, "suspend\n");
1419
1420 console_lock();
1421 mutex_lock(&(par->open_lock));
1422
1423 if ((state.event == PM_EVENT_FREEZE) || (par->ref_count == 0)) {
1424 mutex_unlock(&(par->open_lock));
1425 console_unlock();
1426 return 0;
1427 }
1428
1429 fb_set_suspend(info, 1);
1430
1431 pci_save_state(dev);
1432 pci_disable_device(dev);
1433 pci_set_power_state(dev, pci_choose_state(dev, state));
1434
1435 mutex_unlock(&(par->open_lock));
1436 console_unlock();
1437
1438 return 0;
1439 }
1440
1441
1442 /* PCI resume */
1443
s3_pci_resume(struct pci_dev * dev)1444 static int s3_pci_resume(struct pci_dev* dev)
1445 {
1446 struct fb_info *info = pci_get_drvdata(dev);
1447 struct s3fb_info *par = info->par;
1448 int err;
1449
1450 dev_info(info->device, "resume\n");
1451
1452 console_lock();
1453 mutex_lock(&(par->open_lock));
1454
1455 if (par->ref_count == 0) {
1456 mutex_unlock(&(par->open_lock));
1457 console_unlock();
1458 return 0;
1459 }
1460
1461 pci_set_power_state(dev, PCI_D0);
1462 pci_restore_state(dev);
1463 err = pci_enable_device(dev);
1464 if (err) {
1465 mutex_unlock(&(par->open_lock));
1466 console_unlock();
1467 dev_err(info->device, "error %d enabling device for resume\n", err);
1468 return err;
1469 }
1470 pci_set_master(dev);
1471
1472 s3fb_set_par(info);
1473 fb_set_suspend(info, 0);
1474
1475 mutex_unlock(&(par->open_lock));
1476 console_unlock();
1477
1478 return 0;
1479 }
1480
1481
1482 /* List of boards that we are trying to support */
1483
1484 static const struct pci_device_id s3_devices[] = {
1485 {PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8810), .driver_data = CHIP_XXX_TRIO},
1486 {PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8811), .driver_data = CHIP_XXX_TRIO},
1487 {PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8812), .driver_data = CHIP_M65_AURORA64VP},
1488 {PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8814), .driver_data = CHIP_767_TRIO64UVP},
1489 {PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8901), .driver_data = CHIP_XXX_TRIO64V2_DXGX},
1490 {PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8902), .driver_data = CHIP_551_PLATO_PX},
1491
1492 {PCI_DEVICE(PCI_VENDOR_ID_S3, 0x5631), .driver_data = CHIP_325_VIRGE},
1493 {PCI_DEVICE(PCI_VENDOR_ID_S3, 0x883D), .driver_data = CHIP_988_VIRGE_VX},
1494 {PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8A01), .driver_data = CHIP_XXX_VIRGE_DXGX},
1495 {PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8A10), .driver_data = CHIP_357_VIRGE_GX2},
1496 {PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8A11), .driver_data = CHIP_359_VIRGE_GX2P},
1497 {PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8A12), .driver_data = CHIP_359_VIRGE_GX2P},
1498 {PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8A13), .driver_data = CHIP_36X_TRIO3D_1X_2X},
1499 {PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8904), .driver_data = CHIP_365_TRIO3D},
1500 {PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8C01), .driver_data = CHIP_260_VIRGE_MX},
1501
1502 {0, 0, 0, 0, 0, 0, 0}
1503 };
1504
1505
1506 MODULE_DEVICE_TABLE(pci, s3_devices);
1507
1508 static struct pci_driver s3fb_pci_driver = {
1509 .name = "s3fb",
1510 .id_table = s3_devices,
1511 .probe = s3_pci_probe,
1512 .remove = s3_pci_remove,
1513 .suspend = s3_pci_suspend,
1514 .resume = s3_pci_resume,
1515 };
1516
1517 /* Parse user specified options */
1518
1519 #ifndef MODULE
s3fb_setup(char * options)1520 static int __init s3fb_setup(char *options)
1521 {
1522 char *opt;
1523
1524 if (!options || !*options)
1525 return 0;
1526
1527 while ((opt = strsep(&options, ",")) != NULL) {
1528
1529 if (!*opt)
1530 continue;
1531 else if (!strncmp(opt, "mtrr:", 5))
1532 mtrr = simple_strtoul(opt + 5, NULL, 0);
1533 else if (!strncmp(opt, "fasttext:", 9))
1534 fasttext = simple_strtoul(opt + 9, NULL, 0);
1535 else
1536 mode_option = opt;
1537 }
1538
1539 return 0;
1540 }
1541 #endif
1542
1543 /* Cleanup */
1544
s3fb_cleanup(void)1545 static void __exit s3fb_cleanup(void)
1546 {
1547 pr_debug("s3fb: cleaning up\n");
1548 pci_unregister_driver(&s3fb_pci_driver);
1549 }
1550
1551 /* Driver Initialisation */
1552
s3fb_init(void)1553 static int __init s3fb_init(void)
1554 {
1555
1556 #ifndef MODULE
1557 char *option = NULL;
1558
1559 if (fb_get_options("s3fb", &option))
1560 return -ENODEV;
1561 s3fb_setup(option);
1562 #endif
1563
1564 pr_debug("s3fb: initializing\n");
1565 return pci_register_driver(&s3fb_pci_driver);
1566 }
1567
1568 /* ------------------------------------------------------------------------- */
1569
1570 /* Modularization */
1571
1572 module_init(s3fb_init);
1573 module_exit(s3fb_cleanup);
1574
