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OMAPDSS: Add methods for skipping display initialization
[android-sdk/kernel-video.git] / drivers / video / fbdev / s3fb.c
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  */
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>
28 #include <linux/i2c.h>
29 #include <linux/i2c-algo-bit.h>
31 #ifdef CONFIG_MTRR
32 #include <asm/mtrr.h>
33 #endif
35 struct s3fb_info {
36         int chip, rev, mclk_freq;
37         int mtrr_reg;
38         struct vgastate state;
39         struct mutex open_lock;
40         unsigned int ref_count;
41         u32 pseudo_palette[16];
42 #ifdef CONFIG_FB_S3_DDC
43         u8 __iomem *mmio;
44         bool ddc_registered;
45         struct i2c_adapter ddc_adapter;
46         struct i2c_algo_bit_data ddc_algo;
47 #endif
48 };
51 /* ------------------------------------------------------------------------- */
53 static const struct svga_fb_format s3fb_formats[] = {
54         { 0,  {0, 6, 0},  {0, 6, 0},  {0, 6, 0}, {0, 0, 0}, 0,
55                 FB_TYPE_TEXT, FB_AUX_TEXT_SVGA_STEP4,   FB_VISUAL_PSEUDOCOLOR, 8, 16},
56         { 4,  {0, 4, 0},  {0, 4, 0},  {0, 4, 0}, {0, 0, 0}, 0,
57                 FB_TYPE_PACKED_PIXELS, 0,               FB_VISUAL_PSEUDOCOLOR, 8, 16},
58         { 4,  {0, 4, 0},  {0, 4, 0},  {0, 4, 0}, {0, 0, 0}, 1,
59                 FB_TYPE_INTERLEAVED_PLANES, 1,          FB_VISUAL_PSEUDOCOLOR, 8, 16},
60         { 8,  {0, 8, 0},  {0, 8, 0},  {0, 8, 0}, {0, 0, 0}, 0,
61                 FB_TYPE_PACKED_PIXELS, 0,               FB_VISUAL_PSEUDOCOLOR, 4, 8},
62         {16,  {10, 5, 0}, {5, 5, 0},  {0, 5, 0}, {0, 0, 0}, 0,
63                 FB_TYPE_PACKED_PIXELS, 0,               FB_VISUAL_TRUECOLOR, 2, 4},
64         {16,  {11, 5, 0}, {5, 6, 0},  {0, 5, 0}, {0, 0, 0}, 0,
65                 FB_TYPE_PACKED_PIXELS, 0,               FB_VISUAL_TRUECOLOR, 2, 4},
66         {24,  {16, 8, 0}, {8, 8, 0},  {0, 8, 0}, {0, 0, 0}, 0,
67                 FB_TYPE_PACKED_PIXELS, 0,               FB_VISUAL_TRUECOLOR, 1, 2},
68         {32,  {16, 8, 0}, {8, 8, 0},  {0, 8, 0}, {0, 0, 0}, 0,
69                 FB_TYPE_PACKED_PIXELS, 0,               FB_VISUAL_TRUECOLOR, 1, 2},
70         SVGA_FORMAT_END
71 };
74 static const struct svga_pll s3_pll = {3, 129, 3, 33, 0, 3,
75         35000, 240000, 14318};
76 static const struct svga_pll s3_trio3d_pll = {3, 129, 3, 31, 0, 4,
77         230000, 460000, 14318};
79 static const int s3_memsizes[] = {4096, 0, 3072, 8192, 2048, 6144, 1024, 512};
81 static const char * const s3_names[] = {"S3 Unknown", "S3 Trio32", "S3 Trio64", "S3 Trio64V+",
82                         "S3 Trio64UV+", "S3 Trio64V2/DX", "S3 Trio64V2/GX",
83                         "S3 Plato/PX", "S3 Aurora64V+", "S3 Virge",
84                         "S3 Virge/VX", "S3 Virge/DX", "S3 Virge/GX",
85                         "S3 Virge/GX2", "S3 Virge/GX2+", "",
86                         "S3 Trio3D/1X", "S3 Trio3D/2X", "S3 Trio3D/2X",
87                         "S3 Trio3D", "S3 Virge/MX"};
89 #define CHIP_UNKNOWN            0x00
90 #define CHIP_732_TRIO32         0x01
91 #define CHIP_764_TRIO64         0x02
92 #define CHIP_765_TRIO64VP       0x03
93 #define CHIP_767_TRIO64UVP      0x04
94 #define CHIP_775_TRIO64V2_DX    0x05
95 #define CHIP_785_TRIO64V2_GX    0x06
96 #define CHIP_551_PLATO_PX       0x07
97 #define CHIP_M65_AURORA64VP     0x08
98 #define CHIP_325_VIRGE          0x09
99 #define CHIP_988_VIRGE_VX       0x0A
100 #define CHIP_375_VIRGE_DX       0x0B
101 #define CHIP_385_VIRGE_GX       0x0C
102 #define CHIP_357_VIRGE_GX2      0x0D
103 #define CHIP_359_VIRGE_GX2P     0x0E
104 #define CHIP_360_TRIO3D_1X      0x10
105 #define CHIP_362_TRIO3D_2X      0x11
106 #define CHIP_368_TRIO3D_2X      0x12
107 #define CHIP_365_TRIO3D         0x13
108 #define CHIP_260_VIRGE_MX       0x14
110 #define CHIP_XXX_TRIO           0x80
111 #define CHIP_XXX_TRIO64V2_DXGX  0x81
112 #define CHIP_XXX_VIRGE_DXGX     0x82
113 #define CHIP_36X_TRIO3D_1X_2X   0x83
115 #define CHIP_UNDECIDED_FLAG     0x80
116 #define CHIP_MASK               0xFF
118 #define MMIO_OFFSET             0x1000000
119 #define MMIO_SIZE               0x10000
121 /* CRT timing register sets */
123 static const struct vga_regset s3_h_total_regs[]        = {{0x00, 0, 7}, {0x5D, 0, 0}, VGA_REGSET_END};
124 static const struct vga_regset s3_h_display_regs[]      = {{0x01, 0, 7}, {0x5D, 1, 1}, VGA_REGSET_END};
125 static const struct vga_regset s3_h_blank_start_regs[]  = {{0x02, 0, 7}, {0x5D, 2, 2}, VGA_REGSET_END};
126 static const struct vga_regset s3_h_blank_end_regs[]    = {{0x03, 0, 4}, {0x05, 7, 7}, VGA_REGSET_END};
127 static const struct vga_regset s3_h_sync_start_regs[]   = {{0x04, 0, 7}, {0x5D, 4, 4}, VGA_REGSET_END};
128 static const struct vga_regset s3_h_sync_end_regs[]     = {{0x05, 0, 4}, VGA_REGSET_END};
130 static const struct vga_regset s3_v_total_regs[]        = {{0x06, 0, 7}, {0x07, 0, 0}, {0x07, 5, 5}, {0x5E, 0, 0}, VGA_REGSET_END};
131 static const struct vga_regset s3_v_display_regs[]      = {{0x12, 0, 7}, {0x07, 1, 1}, {0x07, 6, 6}, {0x5E, 1, 1}, VGA_REGSET_END};
132 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};
133 static const struct vga_regset s3_v_blank_end_regs[]    = {{0x16, 0, 7}, VGA_REGSET_END};
134 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};
135 static const struct vga_regset s3_v_sync_end_regs[]     = {{0x11, 0, 3}, VGA_REGSET_END};
137 static const struct vga_regset s3_line_compare_regs[]   = {{0x18, 0, 7}, {0x07, 4, 4}, {0x09, 6, 6}, {0x5E, 6, 6}, VGA_REGSET_END};
138 static const struct vga_regset s3_start_address_regs[]  = {{0x0d, 0, 7}, {0x0c, 0, 7}, {0x69, 0, 4}, VGA_REGSET_END};
139 static const struct vga_regset s3_offset_regs[]         = {{0x13, 0, 7}, {0x51, 4, 5}, VGA_REGSET_END}; /* set 0x43 bit 2 to 0 */
141 static const struct vga_regset s3_dtpc_regs[]           = {{0x3B, 0, 7}, {0x5D, 6, 6}, VGA_REGSET_END};
143 static const struct svga_timing_regs s3_timing_regs     = {
144         s3_h_total_regs, s3_h_display_regs, s3_h_blank_start_regs,
145         s3_h_blank_end_regs, s3_h_sync_start_regs, s3_h_sync_end_regs,
146         s3_v_total_regs, s3_v_display_regs, s3_v_blank_start_regs,
147         s3_v_blank_end_regs, s3_v_sync_start_regs, s3_v_sync_end_regs,
148 };
151 /* ------------------------------------------------------------------------- */
153 /* Module parameters */
156 static char *mode_option;
158 #ifdef CONFIG_MTRR
159 static int mtrr = 1;
160 #endif
162 static int fasttext = 1;
165 MODULE_AUTHOR("(c) 2006-2007 Ondrej Zajicek <santiago@crfreenet.org>");
166 MODULE_LICENSE("GPL");
167 MODULE_DESCRIPTION("fbdev driver for S3 Trio/Virge");
169 module_param(mode_option, charp, 0444);
170 MODULE_PARM_DESC(mode_option, "Default video mode ('640x480-8@60', etc)");
171 module_param_named(mode, mode_option, charp, 0444);
172 MODULE_PARM_DESC(mode, "Default video mode ('640x480-8@60', etc) (deprecated)");
174 #ifdef CONFIG_MTRR
175 module_param(mtrr, int, 0444);
176 MODULE_PARM_DESC(mtrr, "Enable write-combining with MTRR (1=enable, 0=disable, default=1)");
177 #endif
179 module_param(fasttext, int, 0644);
180 MODULE_PARM_DESC(fasttext, "Enable S3 fast text mode (1=enable, 0=disable, default=1)");
183 /* ------------------------------------------------------------------------- */
185 #ifdef CONFIG_FB_S3_DDC
187 #define DDC_REG         0xaa            /* Trio 3D/1X/2X */
188 #define DDC_MMIO_REG    0xff20          /* all other chips */
189 #define DDC_SCL_OUT     (1 << 0)
190 #define DDC_SDA_OUT     (1 << 1)
191 #define DDC_SCL_IN      (1 << 2)
192 #define DDC_SDA_IN      (1 << 3)
193 #define DDC_DRIVE_EN    (1 << 4)
195 static bool s3fb_ddc_needs_mmio(int chip)
197         return !(chip == CHIP_360_TRIO3D_1X  ||
198                  chip == CHIP_362_TRIO3D_2X  ||
199                  chip == CHIP_368_TRIO3D_2X);
202 static u8 s3fb_ddc_read(struct s3fb_info *par)
204         if (s3fb_ddc_needs_mmio(par->chip))
205                 return readb(par->mmio + DDC_MMIO_REG);
206         else
207                 return vga_rcrt(par->state.vgabase, DDC_REG);
210 static void s3fb_ddc_write(struct s3fb_info *par, u8 val)
212         if (s3fb_ddc_needs_mmio(par->chip))
213                 writeb(val, par->mmio + DDC_MMIO_REG);
214         else
215                 vga_wcrt(par->state.vgabase, DDC_REG, val);
218 static void s3fb_ddc_setscl(void *data, int val)
220         struct s3fb_info *par = data;
221         unsigned char reg;
223         reg = s3fb_ddc_read(par) | DDC_DRIVE_EN;
224         if (val)
225                 reg |= DDC_SCL_OUT;
226         else
227                 reg &= ~DDC_SCL_OUT;
228         s3fb_ddc_write(par, reg);
231 static void s3fb_ddc_setsda(void *data, int val)
233         struct s3fb_info *par = data;
234         unsigned char reg;
236         reg = s3fb_ddc_read(par) | DDC_DRIVE_EN;
237         if (val)
238                 reg |= DDC_SDA_OUT;
239         else
240                 reg &= ~DDC_SDA_OUT;
241         s3fb_ddc_write(par, reg);
244 static int s3fb_ddc_getscl(void *data)
246         struct s3fb_info *par = data;
248         return !!(s3fb_ddc_read(par) & DDC_SCL_IN);
251 static int s3fb_ddc_getsda(void *data)
253         struct s3fb_info *par = data;
255         return !!(s3fb_ddc_read(par) & DDC_SDA_IN);
258 static int s3fb_setup_ddc_bus(struct fb_info *info)
260         struct s3fb_info *par = info->par;
262         strlcpy(par->ddc_adapter.name, info->fix.id,
263                 sizeof(par->ddc_adapter.name));
264         par->ddc_adapter.owner          = THIS_MODULE;
265         par->ddc_adapter.class          = I2C_CLASS_DDC;
266         par->ddc_adapter.algo_data      = &par->ddc_algo;
267         par->ddc_adapter.dev.parent     = info->device;
268         par->ddc_algo.setsda            = s3fb_ddc_setsda;
269         par->ddc_algo.setscl            = s3fb_ddc_setscl;
270         par->ddc_algo.getsda            = s3fb_ddc_getsda;
271         par->ddc_algo.getscl            = s3fb_ddc_getscl;
272         par->ddc_algo.udelay            = 10;
273         par->ddc_algo.timeout           = 20;
274         par->ddc_algo.data              = par;
276         i2c_set_adapdata(&par->ddc_adapter, par);
278         /*
279          * some Virge cards have external MUX to switch chip I2C bus between
280          * DDC and extension pins - switch it do DDC
281          */
282 /*      vga_wseq(par->state.vgabase, 0x08, 0x06); - not needed, already unlocked */
283         if (par->chip == CHIP_357_VIRGE_GX2 ||
284             par->chip == CHIP_359_VIRGE_GX2P ||
285             par->chip == CHIP_260_VIRGE_MX)
286                 svga_wseq_mask(par->state.vgabase, 0x0d, 0x01, 0x03);
287         else
288                 svga_wseq_mask(par->state.vgabase, 0x0d, 0x00, 0x03);
289         /* some Virge need this or the DDC is ignored */
290         svga_wcrt_mask(par->state.vgabase, 0x5c, 0x03, 0x03);
292         return i2c_bit_add_bus(&par->ddc_adapter);
294 #endif /* CONFIG_FB_S3_DDC */
297 /* ------------------------------------------------------------------------- */
299 /* Set font in S3 fast text mode */
301 static void s3fb_settile_fast(struct fb_info *info, struct fb_tilemap *map)
303         const u8 *font = map->data;
304         u8 __iomem *fb = (u8 __iomem *) info->screen_base;
305         int i, c;
307         if ((map->width != 8) || (map->height != 16) ||
308             (map->depth != 1) || (map->length != 256)) {
309                 fb_err(info, "unsupported font parameters: width %d, height %d, depth %d, length %d\n",
310                        map->width, map->height, map->depth, map->length);
311                 return;
312         }
314         fb += 2;
315         for (i = 0; i < map->height; i++) {
316                 for (c = 0; c < map->length; c++) {
317                         fb_writeb(font[c * map->height + i], fb + c * 4);
318                 }
319                 fb += 1024;
320         }
323 static void s3fb_tilecursor(struct fb_info *info, struct fb_tilecursor *cursor)
325         struct s3fb_info *par = info->par;
327         svga_tilecursor(par->state.vgabase, info, cursor);
330 static struct fb_tile_ops s3fb_tile_ops = {
331         .fb_settile     = svga_settile,
332         .fb_tilecopy    = svga_tilecopy,
333         .fb_tilefill    = svga_tilefill,
334         .fb_tileblit    = svga_tileblit,
335         .fb_tilecursor  = s3fb_tilecursor,
336         .fb_get_tilemax = svga_get_tilemax,
337 };
339 static struct fb_tile_ops s3fb_fast_tile_ops = {
340         .fb_settile     = s3fb_settile_fast,
341         .fb_tilecopy    = svga_tilecopy,
342         .fb_tilefill    = svga_tilefill,
343         .fb_tileblit    = svga_tileblit,
344         .fb_tilecursor  = s3fb_tilecursor,
345         .fb_get_tilemax = svga_get_tilemax,
346 };
349 /* ------------------------------------------------------------------------- */
351 /* image data is MSB-first, fb structure is MSB-first too */
352 static inline u32 expand_color(u32 c)
354         return ((c & 1) | ((c & 2) << 7) | ((c & 4) << 14) | ((c & 8) << 21)) * 0xFF;
357 /* s3fb_iplan_imageblit silently assumes that almost everything is 8-pixel aligned */
358 static void s3fb_iplan_imageblit(struct fb_info *info, const struct fb_image *image)
360         u32 fg = expand_color(image->fg_color);
361         u32 bg = expand_color(image->bg_color);
362         const u8 *src1, *src;
363         u8 __iomem *dst1;
364         u32 __iomem *dst;
365         u32 val;
366         int x, y;
368         src1 = image->data;
369         dst1 = info->screen_base + (image->dy * info->fix.line_length)
370                  + ((image->dx / 8) * 4);
372         for (y = 0; y < image->height; y++) {
373                 src = src1;
374                 dst = (u32 __iomem *) dst1;
375                 for (x = 0; x < image->width; x += 8) {
376                         val = *(src++) * 0x01010101;
377                         val = (val & fg) | (~val & bg);
378                         fb_writel(val, dst++);
379                 }
380                 src1 += image->width / 8;
381                 dst1 += info->fix.line_length;
382         }
386 /* s3fb_iplan_fillrect silently assumes that almost everything is 8-pixel aligned */
387 static void s3fb_iplan_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
389         u32 fg = expand_color(rect->color);
390         u8 __iomem *dst1;
391         u32 __iomem *dst;
392         int x, y;
394         dst1 = info->screen_base + (rect->dy * info->fix.line_length)
395                  + ((rect->dx / 8) * 4);
397         for (y = 0; y < rect->height; y++) {
398                 dst = (u32 __iomem *) dst1;
399                 for (x = 0; x < rect->width; x += 8) {
400                         fb_writel(fg, dst++);
401                 }
402                 dst1 += info->fix.line_length;
403         }
407 /* image data is MSB-first, fb structure is high-nibble-in-low-byte-first */
408 static inline u32 expand_pixel(u32 c)
410         return (((c &  1) << 24) | ((c &  2) << 27) | ((c &  4) << 14) | ((c &   8) << 17) |
411                 ((c & 16) <<  4) | ((c & 32) <<  7) | ((c & 64) >>  6) | ((c & 128) >>  3)) * 0xF;
414 /* s3fb_cfb4_imageblit silently assumes that almost everything is 8-pixel aligned */
415 static void s3fb_cfb4_imageblit(struct fb_info *info, const struct fb_image *image)
417         u32 fg = image->fg_color * 0x11111111;
418         u32 bg = image->bg_color * 0x11111111;
419         const u8 *src1, *src;
420         u8 __iomem *dst1;
421         u32 __iomem *dst;
422         u32 val;
423         int x, y;
425         src1 = image->data;
426         dst1 = info->screen_base + (image->dy * info->fix.line_length)
427                  + ((image->dx / 8) * 4);
429         for (y = 0; y < image->height; y++) {
430                 src = src1;
431                 dst = (u32 __iomem *) dst1;
432                 for (x = 0; x < image->width; x += 8) {
433                         val = expand_pixel(*(src++));
434                         val = (val & fg) | (~val & bg);
435                         fb_writel(val, dst++);
436                 }
437                 src1 += image->width / 8;
438                 dst1 += info->fix.line_length;
439         }
442 static void s3fb_imageblit(struct fb_info *info, const struct fb_image *image)
444         if ((info->var.bits_per_pixel == 4) && (image->depth == 1)
445             && ((image->width % 8) == 0) && ((image->dx % 8) == 0)) {
446                 if (info->fix.type == FB_TYPE_INTERLEAVED_PLANES)
447                         s3fb_iplan_imageblit(info, image);
448                 else
449                         s3fb_cfb4_imageblit(info, image);
450         } else
451                 cfb_imageblit(info, image);
454 static void s3fb_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
456         if ((info->var.bits_per_pixel == 4)
457             && ((rect->width % 8) == 0) && ((rect->dx % 8) == 0)
458             && (info->fix.type == FB_TYPE_INTERLEAVED_PLANES))
459                 s3fb_iplan_fillrect(info, rect);
460          else
461                 cfb_fillrect(info, rect);
466 /* ------------------------------------------------------------------------- */
469 static void s3_set_pixclock(struct fb_info *info, u32 pixclock)
471         struct s3fb_info *par = info->par;
472         u16 m, n, r;
473         u8 regval;
474         int rv;
476         rv = svga_compute_pll((par->chip == CHIP_365_TRIO3D) ? &s3_trio3d_pll : &s3_pll,
477                               1000000000 / pixclock, &m, &n, &r, info->node);
478         if (rv < 0) {
479                 fb_err(info, "cannot set requested pixclock, keeping old value\n");
480                 return;
481         }
483         /* Set VGA misc register  */
484         regval = vga_r(par->state.vgabase, VGA_MIS_R);
485         vga_w(par->state.vgabase, VGA_MIS_W, regval | VGA_MIS_ENB_PLL_LOAD);
487         /* Set S3 clock registers */
488         if (par->chip == CHIP_357_VIRGE_GX2 ||
489             par->chip == CHIP_359_VIRGE_GX2P ||
490             par->chip == CHIP_360_TRIO3D_1X ||
491             par->chip == CHIP_362_TRIO3D_2X ||
492             par->chip == CHIP_368_TRIO3D_2X ||
493             par->chip == CHIP_260_VIRGE_MX) {
494                 vga_wseq(par->state.vgabase, 0x12, (n - 2) | ((r & 3) << 6));   /* n and two bits of r */
495                 vga_wseq(par->state.vgabase, 0x29, r >> 2); /* remaining highest bit of r */
496         } else
497                 vga_wseq(par->state.vgabase, 0x12, (n - 2) | (r << 5));
498         vga_wseq(par->state.vgabase, 0x13, m - 2);
500         udelay(1000);
502         /* Activate clock - write 0, 1, 0 to seq/15 bit 5 */
503         regval = vga_rseq (par->state.vgabase, 0x15); /* | 0x80; */
504         vga_wseq(par->state.vgabase, 0x15, regval & ~(1<<5));
505         vga_wseq(par->state.vgabase, 0x15, regval |  (1<<5));
506         vga_wseq(par->state.vgabase, 0x15, regval & ~(1<<5));
510 /* Open framebuffer */
512 static int s3fb_open(struct fb_info *info, int user)
514         struct s3fb_info *par = info->par;
516         mutex_lock(&(par->open_lock));
517         if (par->ref_count == 0) {
518                 void __iomem *vgabase = par->state.vgabase;
520                 memset(&(par->state), 0, sizeof(struct vgastate));
521                 par->state.vgabase = vgabase;
522                 par->state.flags = VGA_SAVE_MODE | VGA_SAVE_FONTS | VGA_SAVE_CMAP;
523                 par->state.num_crtc = 0x70;
524                 par->state.num_seq = 0x20;
525                 save_vga(&(par->state));
526         }
528         par->ref_count++;
529         mutex_unlock(&(par->open_lock));
531         return 0;
534 /* Close framebuffer */
536 static int s3fb_release(struct fb_info *info, int user)
538         struct s3fb_info *par = info->par;
540         mutex_lock(&(par->open_lock));
541         if (par->ref_count == 0) {
542                 mutex_unlock(&(par->open_lock));
543                 return -EINVAL;
544         }
546         if (par->ref_count == 1)
547                 restore_vga(&(par->state));
549         par->ref_count--;
550         mutex_unlock(&(par->open_lock));
552         return 0;
555 /* Validate passed in var */
557 static int s3fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
559         struct s3fb_info *par = info->par;
560         int rv, mem, step;
561         u16 m, n, r;
563         /* Find appropriate format */
564         rv = svga_match_format (s3fb_formats, var, NULL);
566         /* 32bpp mode is not supported on VIRGE VX,
567            24bpp is not supported on others */
568         if ((par->chip == CHIP_988_VIRGE_VX) ? (rv == 7) : (rv == 6))
569                 rv = -EINVAL;
571         if (rv < 0) {
572                 fb_err(info, "unsupported mode requested\n");
573                 return rv;
574         }
576         /* Do not allow to have real resoulution larger than virtual */
577         if (var->xres > var->xres_virtual)
578                 var->xres_virtual = var->xres;
580         if (var->yres > var->yres_virtual)
581                 var->yres_virtual = var->yres;
583         /* Round up xres_virtual to have proper alignment of lines */
584         step = s3fb_formats[rv].xresstep - 1;
585         var->xres_virtual = (var->xres_virtual+step) & ~step;
587         /* Check whether have enough memory */
588         mem = ((var->bits_per_pixel * var->xres_virtual) >> 3) * var->yres_virtual;
589         if (mem > info->screen_size) {
590                 fb_err(info, "not enough framebuffer memory (%d kB requested , %u kB available)\n",
591                        mem >> 10, (unsigned int) (info->screen_size >> 10));
592                 return -EINVAL;
593         }
595         rv = svga_check_timings (&s3_timing_regs, var, info->node);
596         if (rv < 0) {
597                 fb_err(info, "invalid timings requested\n");
598                 return rv;
599         }
601         rv = svga_compute_pll(&s3_pll, PICOS2KHZ(var->pixclock), &m, &n, &r,
602                                 info->node);
603         if (rv < 0) {
604                 fb_err(info, "invalid pixclock value requested\n");
605                 return rv;
606         }
608         return 0;
611 /* Set video mode from par */
613 static int s3fb_set_par(struct fb_info *info)
615         struct s3fb_info *par = info->par;
616         u32 value, mode, hmul, offset_value, screen_size, multiplex, dbytes;
617         u32 bpp = info->var.bits_per_pixel;
618         u32 htotal, hsstart;
620         if (bpp != 0) {
621                 info->fix.ypanstep = 1;
622                 info->fix.line_length = (info->var.xres_virtual * bpp) / 8;
624                 info->flags &= ~FBINFO_MISC_TILEBLITTING;
625                 info->tileops = NULL;
627                 /* in 4bpp supports 8p wide tiles only, any tiles otherwise */
628                 info->pixmap.blit_x = (bpp == 4) ? (1 << (8 - 1)) : (~(u32)0);
629                 info->pixmap.blit_y = ~(u32)0;
631                 offset_value = (info->var.xres_virtual * bpp) / 64;
632                 screen_size = info->var.yres_virtual * info->fix.line_length;
633         } else {
634                 info->fix.ypanstep = 16;
635                 info->fix.line_length = 0;
637                 info->flags |= FBINFO_MISC_TILEBLITTING;
638                 info->tileops = fasttext ? &s3fb_fast_tile_ops : &s3fb_tile_ops;
640                 /* supports 8x16 tiles only */
641                 info->pixmap.blit_x = 1 << (8 - 1);
642                 info->pixmap.blit_y = 1 << (16 - 1);
644                 offset_value = info->var.xres_virtual / 16;
645                 screen_size = (info->var.xres_virtual * info->var.yres_virtual) / 64;
646         }
648         info->var.xoffset = 0;
649         info->var.yoffset = 0;
650         info->var.activate = FB_ACTIVATE_NOW;
652         /* Unlock registers */
653         vga_wcrt(par->state.vgabase, 0x38, 0x48);
654         vga_wcrt(par->state.vgabase, 0x39, 0xA5);
655         vga_wseq(par->state.vgabase, 0x08, 0x06);
656         svga_wcrt_mask(par->state.vgabase, 0x11, 0x00, 0x80);
658         /* Blank screen and turn off sync */
659         svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
660         svga_wcrt_mask(par->state.vgabase, 0x17, 0x00, 0x80);
662         /* Set default values */
663         svga_set_default_gfx_regs(par->state.vgabase);
664         svga_set_default_atc_regs(par->state.vgabase);
665         svga_set_default_seq_regs(par->state.vgabase);
666         svga_set_default_crt_regs(par->state.vgabase);
667         svga_wcrt_multi(par->state.vgabase, s3_line_compare_regs, 0xFFFFFFFF);
668         svga_wcrt_multi(par->state.vgabase, s3_start_address_regs, 0);
670         /* S3 specific initialization */
671         svga_wcrt_mask(par->state.vgabase, 0x58, 0x10, 0x10); /* enable linear framebuffer */
672         svga_wcrt_mask(par->state.vgabase, 0x31, 0x08, 0x08); /* enable sequencer access to framebuffer above 256 kB */
674 /*      svga_wcrt_mask(par->state.vgabase, 0x33, 0x08, 0x08); */ /* DDR ?       */
675 /*      svga_wcrt_mask(par->state.vgabase, 0x43, 0x01, 0x01); */ /* DDR ?       */
676         svga_wcrt_mask(par->state.vgabase, 0x33, 0x00, 0x08); /* no DDR ?       */
677         svga_wcrt_mask(par->state.vgabase, 0x43, 0x00, 0x01); /* no DDR ?       */
679         svga_wcrt_mask(par->state.vgabase, 0x5D, 0x00, 0x28); /* Clear strange HSlen bits */
681 /*      svga_wcrt_mask(par->state.vgabase, 0x58, 0x03, 0x03); */
683 /*      svga_wcrt_mask(par->state.vgabase, 0x53, 0x12, 0x13); */ /* enable MMIO */
684 /*      svga_wcrt_mask(par->state.vgabase, 0x40, 0x08, 0x08); */ /* enable write buffer */
687         /* Set the offset register */
688         fb_dbg(info, "offset register       : %d\n", offset_value);
689         svga_wcrt_multi(par->state.vgabase, s3_offset_regs, offset_value);
691         if (par->chip != CHIP_357_VIRGE_GX2 &&
692             par->chip != CHIP_359_VIRGE_GX2P &&
693             par->chip != CHIP_360_TRIO3D_1X &&
694             par->chip != CHIP_362_TRIO3D_2X &&
695             par->chip != CHIP_368_TRIO3D_2X &&
696             par->chip != CHIP_260_VIRGE_MX) {
697                 vga_wcrt(par->state.vgabase, 0x54, 0x18); /* M parameter */
698                 vga_wcrt(par->state.vgabase, 0x60, 0xff); /* N parameter */
699                 vga_wcrt(par->state.vgabase, 0x61, 0xff); /* L parameter */
700                 vga_wcrt(par->state.vgabase, 0x62, 0xff); /* L parameter */
701         }
703         vga_wcrt(par->state.vgabase, 0x3A, 0x35);
704         svga_wattr(par->state.vgabase, 0x33, 0x00);
706         if (info->var.vmode & FB_VMODE_DOUBLE)
707                 svga_wcrt_mask(par->state.vgabase, 0x09, 0x80, 0x80);
708         else
709                 svga_wcrt_mask(par->state.vgabase, 0x09, 0x00, 0x80);
711         if (info->var.vmode & FB_VMODE_INTERLACED)
712                 svga_wcrt_mask(par->state.vgabase, 0x42, 0x20, 0x20);
713         else
714                 svga_wcrt_mask(par->state.vgabase, 0x42, 0x00, 0x20);
716         /* Disable hardware graphics cursor */
717         svga_wcrt_mask(par->state.vgabase, 0x45, 0x00, 0x01);
718         /* Disable Streams engine */
719         svga_wcrt_mask(par->state.vgabase, 0x67, 0x00, 0x0C);
721         mode = svga_match_format(s3fb_formats, &(info->var), &(info->fix));
723         /* S3 virge DX hack */
724         if (par->chip == CHIP_375_VIRGE_DX) {
725                 vga_wcrt(par->state.vgabase, 0x86, 0x80);
726                 vga_wcrt(par->state.vgabase, 0x90, 0x00);
727         }
729         /* S3 virge VX hack */
730         if (par->chip == CHIP_988_VIRGE_VX) {
731                 vga_wcrt(par->state.vgabase, 0x50, 0x00);
732                 vga_wcrt(par->state.vgabase, 0x67, 0x50);
733                 msleep(10); /* screen remains blank sometimes without this */
734                 vga_wcrt(par->state.vgabase, 0x63, (mode <= 2) ? 0x90 : 0x09);
735                 vga_wcrt(par->state.vgabase, 0x66, 0x90);
736         }
738         if (par->chip == CHIP_357_VIRGE_GX2 ||
739             par->chip == CHIP_359_VIRGE_GX2P ||
740             par->chip == CHIP_360_TRIO3D_1X ||
741             par->chip == CHIP_362_TRIO3D_2X ||
742             par->chip == CHIP_368_TRIO3D_2X ||
743             par->chip == CHIP_365_TRIO3D    ||
744             par->chip == CHIP_375_VIRGE_DX  ||
745             par->chip == CHIP_385_VIRGE_GX  ||
746             par->chip == CHIP_260_VIRGE_MX) {
747                 dbytes = info->var.xres * ((bpp+7)/8);
748                 vga_wcrt(par->state.vgabase, 0x91, (dbytes + 7) / 8);
749                 vga_wcrt(par->state.vgabase, 0x90, (((dbytes + 7) / 8) >> 8) | 0x80);
751                 vga_wcrt(par->state.vgabase, 0x66, 0x81);
752         }
754         if (par->chip == CHIP_357_VIRGE_GX2  ||
755             par->chip == CHIP_359_VIRGE_GX2P ||
756             par->chip == CHIP_360_TRIO3D_1X ||
757             par->chip == CHIP_362_TRIO3D_2X ||
758             par->chip == CHIP_368_TRIO3D_2X ||
759             par->chip == CHIP_260_VIRGE_MX)
760                 vga_wcrt(par->state.vgabase, 0x34, 0x00);
761         else    /* enable Data Transfer Position Control (DTPC) */
762                 vga_wcrt(par->state.vgabase, 0x34, 0x10);
764         svga_wcrt_mask(par->state.vgabase, 0x31, 0x00, 0x40);
765         multiplex = 0;
766         hmul = 1;
768         /* Set mode-specific register values */
769         switch (mode) {
770         case 0:
771                 fb_dbg(info, "text mode\n");
772                 svga_set_textmode_vga_regs(par->state.vgabase);
774                 /* Set additional registers like in 8-bit mode */
775                 svga_wcrt_mask(par->state.vgabase, 0x50, 0x00, 0x30);
776                 svga_wcrt_mask(par->state.vgabase, 0x67, 0x00, 0xF0);
778                 /* Disable enhanced mode */
779                 svga_wcrt_mask(par->state.vgabase, 0x3A, 0x00, 0x30);
781                 if (fasttext) {
782                         fb_dbg(info, "high speed text mode set\n");
783                         svga_wcrt_mask(par->state.vgabase, 0x31, 0x40, 0x40);
784                 }
785                 break;
786         case 1:
787                 fb_dbg(info, "4 bit pseudocolor\n");
788                 vga_wgfx(par->state.vgabase, VGA_GFX_MODE, 0x40);
790                 /* Set additional registers like in 8-bit mode */
791                 svga_wcrt_mask(par->state.vgabase, 0x50, 0x00, 0x30);
792                 svga_wcrt_mask(par->state.vgabase, 0x67, 0x00, 0xF0);
794                 /* disable enhanced mode */
795                 svga_wcrt_mask(par->state.vgabase, 0x3A, 0x00, 0x30);
796                 break;
797         case 2:
798                 fb_dbg(info, "4 bit pseudocolor, planar\n");
800                 /* Set additional registers like in 8-bit mode */
801                 svga_wcrt_mask(par->state.vgabase, 0x50, 0x00, 0x30);
802                 svga_wcrt_mask(par->state.vgabase, 0x67, 0x00, 0xF0);
804                 /* disable enhanced mode */
805                 svga_wcrt_mask(par->state.vgabase, 0x3A, 0x00, 0x30);
806                 break;
807         case 3:
808                 fb_dbg(info, "8 bit pseudocolor\n");
809                 svga_wcrt_mask(par->state.vgabase, 0x50, 0x00, 0x30);
810                 if (info->var.pixclock > 20000 ||
811                     par->chip == CHIP_357_VIRGE_GX2 ||
812                     par->chip == CHIP_359_VIRGE_GX2P ||
813                     par->chip == CHIP_360_TRIO3D_1X ||
814                     par->chip == CHIP_362_TRIO3D_2X ||
815                     par->chip == CHIP_368_TRIO3D_2X ||
816                     par->chip == CHIP_260_VIRGE_MX)
817                         svga_wcrt_mask(par->state.vgabase, 0x67, 0x00, 0xF0);
818                 else {
819                         svga_wcrt_mask(par->state.vgabase, 0x67, 0x10, 0xF0);
820                         multiplex = 1;
821                 }
822                 break;
823         case 4:
824                 fb_dbg(info, "5/5/5 truecolor\n");
825                 if (par->chip == CHIP_988_VIRGE_VX) {
826                         if (info->var.pixclock > 20000)
827                                 svga_wcrt_mask(par->state.vgabase, 0x67, 0x20, 0xF0);
828                         else
829                                 svga_wcrt_mask(par->state.vgabase, 0x67, 0x30, 0xF0);
830                 } else if (par->chip == CHIP_365_TRIO3D) {
831                         svga_wcrt_mask(par->state.vgabase, 0x50, 0x10, 0x30);
832                         if (info->var.pixclock > 8695) {
833                                 svga_wcrt_mask(par->state.vgabase, 0x67, 0x30, 0xF0);
834                                 hmul = 2;
835                         } else {
836                                 svga_wcrt_mask(par->state.vgabase, 0x67, 0x20, 0xF0);
837                                 multiplex = 1;
838                         }
839                 } else {
840                         svga_wcrt_mask(par->state.vgabase, 0x50, 0x10, 0x30);
841                         svga_wcrt_mask(par->state.vgabase, 0x67, 0x30, 0xF0);
842                         if (par->chip != CHIP_357_VIRGE_GX2 &&
843                             par->chip != CHIP_359_VIRGE_GX2P &&
844                             par->chip != CHIP_360_TRIO3D_1X &&
845                             par->chip != CHIP_362_TRIO3D_2X &&
846                             par->chip != CHIP_368_TRIO3D_2X &&
847                             par->chip != CHIP_260_VIRGE_MX)
848                                 hmul = 2;
849                 }
850                 break;
851         case 5:
852                 fb_dbg(info, "5/6/5 truecolor\n");
853                 if (par->chip == CHIP_988_VIRGE_VX) {
854                         if (info->var.pixclock > 20000)
855                                 svga_wcrt_mask(par->state.vgabase, 0x67, 0x40, 0xF0);
856                         else
857                                 svga_wcrt_mask(par->state.vgabase, 0x67, 0x50, 0xF0);
858                 } else if (par->chip == CHIP_365_TRIO3D) {
859                         svga_wcrt_mask(par->state.vgabase, 0x50, 0x10, 0x30);
860                         if (info->var.pixclock > 8695) {
861                                 svga_wcrt_mask(par->state.vgabase, 0x67, 0x50, 0xF0);
862                                 hmul = 2;
863                         } else {
864                                 svga_wcrt_mask(par->state.vgabase, 0x67, 0x40, 0xF0);
865                                 multiplex = 1;
866                         }
867                 } else {
868                         svga_wcrt_mask(par->state.vgabase, 0x50, 0x10, 0x30);
869                         svga_wcrt_mask(par->state.vgabase, 0x67, 0x50, 0xF0);
870                         if (par->chip != CHIP_357_VIRGE_GX2 &&
871                             par->chip != CHIP_359_VIRGE_GX2P &&
872                             par->chip != CHIP_360_TRIO3D_1X &&
873                             par->chip != CHIP_362_TRIO3D_2X &&
874                             par->chip != CHIP_368_TRIO3D_2X &&
875                             par->chip != CHIP_260_VIRGE_MX)
876                                 hmul = 2;
877                 }
878                 break;
879         case 6:
880                 /* VIRGE VX case */
881                 fb_dbg(info, "8/8/8 truecolor\n");
882                 svga_wcrt_mask(par->state.vgabase, 0x67, 0xD0, 0xF0);
883                 break;
884         case 7:
885                 fb_dbg(info, "8/8/8/8 truecolor\n");
886                 svga_wcrt_mask(par->state.vgabase, 0x50, 0x30, 0x30);
887                 svga_wcrt_mask(par->state.vgabase, 0x67, 0xD0, 0xF0);
888                 break;
889         default:
890                 fb_err(info, "unsupported mode - bug\n");
891                 return -EINVAL;
892         }
894         if (par->chip != CHIP_988_VIRGE_VX) {
895                 svga_wseq_mask(par->state.vgabase, 0x15, multiplex ? 0x10 : 0x00, 0x10);
896                 svga_wseq_mask(par->state.vgabase, 0x18, multiplex ? 0x80 : 0x00, 0x80);
897         }
899         s3_set_pixclock(info, info->var.pixclock);
900         svga_set_timings(par->state.vgabase, &s3_timing_regs, &(info->var), hmul, 1,
901                          (info->var.vmode & FB_VMODE_DOUBLE)     ? 2 : 1,
902                          (info->var.vmode & FB_VMODE_INTERLACED) ? 2 : 1,
903                          hmul, info->node);
905         /* Set interlaced mode start/end register */
906         htotal = info->var.xres + info->var.left_margin + info->var.right_margin + info->var.hsync_len;
907         htotal = ((htotal * hmul) / 8) - 5;
908         vga_wcrt(par->state.vgabase, 0x3C, (htotal + 1) / 2);
910         /* Set Data Transfer Position */
911         hsstart = ((info->var.xres + info->var.right_margin) * hmul) / 8;
912         /* + 2 is needed for Virge/VX, does no harm on other cards */
913         value = clamp((htotal + hsstart + 1) / 2 + 2, hsstart + 4, htotal + 1);
914         svga_wcrt_multi(par->state.vgabase, s3_dtpc_regs, value);
916         memset_io(info->screen_base, 0x00, screen_size);
917         /* Device and screen back on */
918         svga_wcrt_mask(par->state.vgabase, 0x17, 0x80, 0x80);
919         svga_wseq_mask(par->state.vgabase, 0x01, 0x00, 0x20);
921         return 0;
924 /* Set a colour register */
926 static int s3fb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
927                                 u_int transp, struct fb_info *fb)
929         switch (fb->var.bits_per_pixel) {
930         case 0:
931         case 4:
932                 if (regno >= 16)
933                         return -EINVAL;
935                 if ((fb->var.bits_per_pixel == 4) &&
936                     (fb->var.nonstd == 0)) {
937                         outb(0xF0, VGA_PEL_MSK);
938                         outb(regno*16, VGA_PEL_IW);
939                 } else {
940                         outb(0x0F, VGA_PEL_MSK);
941                         outb(regno, VGA_PEL_IW);
942                 }
943                 outb(red >> 10, VGA_PEL_D);
944                 outb(green >> 10, VGA_PEL_D);
945                 outb(blue >> 10, VGA_PEL_D);
946                 break;
947         case 8:
948                 if (regno >= 256)
949                         return -EINVAL;
951                 outb(0xFF, VGA_PEL_MSK);
952                 outb(regno, VGA_PEL_IW);
953                 outb(red >> 10, VGA_PEL_D);
954                 outb(green >> 10, VGA_PEL_D);
955                 outb(blue >> 10, VGA_PEL_D);
956                 break;
957         case 16:
958                 if (regno >= 16)
959                         return 0;
961                 if (fb->var.green.length == 5)
962                         ((u32*)fb->pseudo_palette)[regno] = ((red & 0xF800) >> 1) |
963                                 ((green & 0xF800) >> 6) | ((blue & 0xF800) >> 11);
964                 else if (fb->var.green.length == 6)
965                         ((u32*)fb->pseudo_palette)[regno] = (red & 0xF800) |
966                                 ((green & 0xFC00) >> 5) | ((blue & 0xF800) >> 11);
967                 else return -EINVAL;
968                 break;
969         case 24:
970         case 32:
971                 if (regno >= 16)
972                         return 0;
974                 ((u32*)fb->pseudo_palette)[regno] = ((red & 0xFF00) << 8) |
975                         (green & 0xFF00) | ((blue & 0xFF00) >> 8);
976                 break;
977         default:
978                 return -EINVAL;
979         }
981         return 0;
985 /* Set the display blanking state */
987 static int s3fb_blank(int blank_mode, struct fb_info *info)
989         struct s3fb_info *par = info->par;
991         switch (blank_mode) {
992         case FB_BLANK_UNBLANK:
993                 fb_dbg(info, "unblank\n");
994                 svga_wcrt_mask(par->state.vgabase, 0x56, 0x00, 0x06);
995                 svga_wseq_mask(par->state.vgabase, 0x01, 0x00, 0x20);
996                 break;
997         case FB_BLANK_NORMAL:
998                 fb_dbg(info, "blank\n");
999                 svga_wcrt_mask(par->state.vgabase, 0x56, 0x00, 0x06);
1000                 svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
1001                 break;
1002         case FB_BLANK_HSYNC_SUSPEND:
1003                 fb_dbg(info, "hsync\n");
1004                 svga_wcrt_mask(par->state.vgabase, 0x56, 0x02, 0x06);
1005                 svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
1006                 break;
1007         case FB_BLANK_VSYNC_SUSPEND:
1008                 fb_dbg(info, "vsync\n");
1009                 svga_wcrt_mask(par->state.vgabase, 0x56, 0x04, 0x06);
1010                 svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
1011                 break;
1012         case FB_BLANK_POWERDOWN:
1013                 fb_dbg(info, "sync down\n");
1014                 svga_wcrt_mask(par->state.vgabase, 0x56, 0x06, 0x06);
1015                 svga_wseq_mask(par->state.vgabase, 0x01, 0x20, 0x20);
1016                 break;
1017         }
1019         return 0;
1023 /* Pan the display */
1025 static int s3fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
1027         struct s3fb_info *par = info->par;
1028         unsigned int offset;
1030         /* Calculate the offset */
1031         if (info->var.bits_per_pixel == 0) {
1032                 offset = (var->yoffset / 16) * (info->var.xres_virtual / 2)
1033                        + (var->xoffset / 2);
1034                 offset = offset >> 2;
1035         } else {
1036                 offset = (var->yoffset * info->fix.line_length) +
1037                          (var->xoffset * info->var.bits_per_pixel / 8);
1038                 offset = offset >> 2;
1039         }
1041         /* Set the offset */
1042         svga_wcrt_multi(par->state.vgabase, s3_start_address_regs, offset);
1044         return 0;
1047 /* ------------------------------------------------------------------------- */
1049 /* Frame buffer operations */
1051 static struct fb_ops s3fb_ops = {
1052         .owner          = THIS_MODULE,
1053         .fb_open        = s3fb_open,
1054         .fb_release     = s3fb_release,
1055         .fb_check_var   = s3fb_check_var,
1056         .fb_set_par     = s3fb_set_par,
1057         .fb_setcolreg   = s3fb_setcolreg,
1058         .fb_blank       = s3fb_blank,
1059         .fb_pan_display = s3fb_pan_display,
1060         .fb_fillrect    = s3fb_fillrect,
1061         .fb_copyarea    = cfb_copyarea,
1062         .fb_imageblit   = s3fb_imageblit,
1063         .fb_get_caps    = svga_get_caps,
1064 };
1066 /* ------------------------------------------------------------------------- */
1068 static int s3_identification(struct s3fb_info *par)
1070         int chip = par->chip;
1072         if (chip == CHIP_XXX_TRIO) {
1073                 u8 cr30 = vga_rcrt(par->state.vgabase, 0x30);
1074                 u8 cr2e = vga_rcrt(par->state.vgabase, 0x2e);
1075                 u8 cr2f = vga_rcrt(par->state.vgabase, 0x2f);
1077                 if ((cr30 == 0xE0) || (cr30 == 0xE1)) {
1078                         if (cr2e == 0x10)
1079                                 return CHIP_732_TRIO32;
1080                         if (cr2e == 0x11) {
1081                                 if (! (cr2f & 0x40))
1082                                         return CHIP_764_TRIO64;
1083                                 else
1084                                         return CHIP_765_TRIO64VP;
1085                         }
1086                 }
1087         }
1089         if (chip == CHIP_XXX_TRIO64V2_DXGX) {
1090                 u8 cr6f = vga_rcrt(par->state.vgabase, 0x6f);
1092                 if (! (cr6f & 0x01))
1093                         return CHIP_775_TRIO64V2_DX;
1094                 else
1095                         return CHIP_785_TRIO64V2_GX;
1096         }
1098         if (chip == CHIP_XXX_VIRGE_DXGX) {
1099                 u8 cr6f = vga_rcrt(par->state.vgabase, 0x6f);
1101                 if (! (cr6f & 0x01))
1102                         return CHIP_375_VIRGE_DX;
1103                 else
1104                         return CHIP_385_VIRGE_GX;
1105         }
1107         if (chip == CHIP_36X_TRIO3D_1X_2X) {
1108                 switch (vga_rcrt(par->state.vgabase, 0x2f)) {
1109                 case 0x00:
1110                         return CHIP_360_TRIO3D_1X;
1111                 case 0x01:
1112                         return CHIP_362_TRIO3D_2X;
1113                 case 0x02:
1114                         return CHIP_368_TRIO3D_2X;
1115                 }
1116         }
1118         return CHIP_UNKNOWN;
1122 /* PCI probe */
1124 static int s3_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
1126         struct pci_bus_region bus_reg;
1127         struct resource vga_res;
1128         struct fb_info *info;
1129         struct s3fb_info *par;
1130         int rc;
1131         u8 regval, cr38, cr39;
1132         bool found = false;
1134         /* Ignore secondary VGA device because there is no VGA arbitration */
1135         if (! svga_primary_device(dev)) {
1136                 dev_info(&(dev->dev), "ignoring secondary device\n");
1137                 return -ENODEV;
1138         }
1140         /* Allocate and fill driver data structure */
1141         info = framebuffer_alloc(sizeof(struct s3fb_info), &(dev->dev));
1142         if (!info) {
1143                 dev_err(&(dev->dev), "cannot allocate memory\n");
1144                 return -ENOMEM;
1145         }
1147         par = info->par;
1148         mutex_init(&par->open_lock);
1150         info->flags = FBINFO_PARTIAL_PAN_OK | FBINFO_HWACCEL_YPAN;
1151         info->fbops = &s3fb_ops;
1153         /* Prepare PCI device */
1154         rc = pci_enable_device(dev);
1155         if (rc < 0) {
1156                 dev_err(info->device, "cannot enable PCI device\n");
1157                 goto err_enable_device;
1158         }
1160         rc = pci_request_regions(dev, "s3fb");
1161         if (rc < 0) {
1162                 dev_err(info->device, "cannot reserve framebuffer region\n");
1163                 goto err_request_regions;
1164         }
1167         info->fix.smem_start = pci_resource_start(dev, 0);
1168         info->fix.smem_len = pci_resource_len(dev, 0);
1170         /* Map physical IO memory address into kernel space */
1171         info->screen_base = pci_iomap(dev, 0, 0);
1172         if (! info->screen_base) {
1173                 rc = -ENOMEM;
1174                 dev_err(info->device, "iomap for framebuffer failed\n");
1175                 goto err_iomap;
1176         }
1178         bus_reg.start = 0;
1179         bus_reg.end = 64 * 1024;
1181         vga_res.flags = IORESOURCE_IO;
1183         pcibios_bus_to_resource(dev->bus, &vga_res, &bus_reg);
1185         par->state.vgabase = (void __iomem *) vga_res.start;
1187         /* Unlock regs */
1188         cr38 = vga_rcrt(par->state.vgabase, 0x38);
1189         cr39 = vga_rcrt(par->state.vgabase, 0x39);
1190         vga_wseq(par->state.vgabase, 0x08, 0x06);
1191         vga_wcrt(par->state.vgabase, 0x38, 0x48);
1192         vga_wcrt(par->state.vgabase, 0x39, 0xA5);
1194         /* Identify chip type */
1195         par->chip = id->driver_data & CHIP_MASK;
1196         par->rev = vga_rcrt(par->state.vgabase, 0x2f);
1197         if (par->chip & CHIP_UNDECIDED_FLAG)
1198                 par->chip = s3_identification(par);
1200         /* Find how many physical memory there is on card */
1201         /* 0x36 register is accessible even if other registers are locked */
1202         regval = vga_rcrt(par->state.vgabase, 0x36);
1203         if (par->chip == CHIP_360_TRIO3D_1X ||
1204             par->chip == CHIP_362_TRIO3D_2X ||
1205             par->chip == CHIP_368_TRIO3D_2X ||
1206             par->chip == CHIP_365_TRIO3D) {
1207                 switch ((regval & 0xE0) >> 5) {
1208                 case 0: /* 8MB -- only 4MB usable for display */
1209                 case 1: /* 4MB with 32-bit bus */
1210                 case 2: /* 4MB */
1211                         info->screen_size = 4 << 20;
1212                         break;
1213                 case 4: /* 2MB on 365 Trio3D */
1214                 case 6: /* 2MB */
1215                         info->screen_size = 2 << 20;
1216                         break;
1217                 }
1218         } else if (par->chip == CHIP_357_VIRGE_GX2 ||
1219                    par->chip == CHIP_359_VIRGE_GX2P ||
1220                    par->chip == CHIP_260_VIRGE_MX) {
1221                 switch ((regval & 0xC0) >> 6) {
1222                 case 1: /* 4MB */
1223                         info->screen_size = 4 << 20;
1224                         break;
1225                 case 3: /* 2MB */
1226                         info->screen_size = 2 << 20;
1227                         break;
1228                 }
1229         } else if (par->chip == CHIP_988_VIRGE_VX) {
1230                 switch ((regval & 0x60) >> 5) {
1231                 case 0: /* 2MB */
1232                         info->screen_size = 2 << 20;
1233                         break;
1234                 case 1: /* 4MB */
1235                         info->screen_size = 4 << 20;
1236                         break;
1237                 case 2: /* 6MB */
1238                         info->screen_size = 6 << 20;
1239                         break;
1240                 case 3: /* 8MB */
1241                         info->screen_size = 8 << 20;
1242                         break;
1243                 }
1244                 /* off-screen memory */
1245                 regval = vga_rcrt(par->state.vgabase, 0x37);
1246                 switch ((regval & 0x60) >> 5) {
1247                 case 1: /* 4MB */
1248                         info->screen_size -= 4 << 20;
1249                         break;
1250                 case 2: /* 2MB */
1251                         info->screen_size -= 2 << 20;
1252                         break;
1253                 }
1254         } else
1255                 info->screen_size = s3_memsizes[regval >> 5] << 10;
1256         info->fix.smem_len = info->screen_size;
1258         /* Find MCLK frequency */
1259         regval = vga_rseq(par->state.vgabase, 0x10);
1260         par->mclk_freq = ((vga_rseq(par->state.vgabase, 0x11) + 2) * 14318) / ((regval & 0x1F)  + 2);
1261         par->mclk_freq = par->mclk_freq >> (regval >> 5);
1263         /* Restore locks */
1264         vga_wcrt(par->state.vgabase, 0x38, cr38);
1265         vga_wcrt(par->state.vgabase, 0x39, cr39);
1267         strcpy(info->fix.id, s3_names [par->chip]);
1268         info->fix.mmio_start = 0;
1269         info->fix.mmio_len = 0;
1270         info->fix.type = FB_TYPE_PACKED_PIXELS;
1271         info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
1272         info->fix.ypanstep = 0;
1273         info->fix.accel = FB_ACCEL_NONE;
1274         info->pseudo_palette = (void*) (par->pseudo_palette);
1275         info->var.bits_per_pixel = 8;
1277 #ifdef CONFIG_FB_S3_DDC
1278         /* Enable MMIO if needed */
1279         if (s3fb_ddc_needs_mmio(par->chip)) {
1280                 par->mmio = ioremap(info->fix.smem_start + MMIO_OFFSET, MMIO_SIZE);
1281                 if (par->mmio)
1282                         svga_wcrt_mask(par->state.vgabase, 0x53, 0x08, 0x08);   /* enable MMIO */
1283                 else
1284                         dev_err(info->device, "unable to map MMIO at 0x%lx, disabling DDC",
1285                                 info->fix.smem_start + MMIO_OFFSET);
1286         }
1287         if (!s3fb_ddc_needs_mmio(par->chip) || par->mmio)
1288                 if (s3fb_setup_ddc_bus(info) == 0) {
1289                         u8 *edid = fb_ddc_read(&par->ddc_adapter);
1290                         par->ddc_registered = true;
1291                         if (edid) {
1292                                 fb_edid_to_monspecs(edid, &info->monspecs);
1293                                 kfree(edid);
1294                                 if (!info->monspecs.modedb)
1295                                         dev_err(info->device, "error getting mode database\n");
1296                                 else {
1297                                         const struct fb_videomode *m;
1299                                         fb_videomode_to_modelist(info->monspecs.modedb,
1300                                                                  info->monspecs.modedb_len,
1301                                                                  &info->modelist);
1302                                         m = fb_find_best_display(&info->monspecs, &info->modelist);
1303                                         if (m) {
1304                                                 fb_videomode_to_var(&info->var, m);
1305                                                 /* fill all other info->var's fields */
1306                                                 if (s3fb_check_var(&info->var, info) == 0)
1307                                                         found = true;
1308                                         }
1309                                 }
1310                         }
1311                 }
1312 #endif
1313         if (!mode_option && !found)
1314                 mode_option = "640x480-8@60";
1316         /* Prepare startup mode */
1317         if (mode_option) {
1318                 rc = fb_find_mode(&info->var, info, mode_option,
1319                                    info->monspecs.modedb, info->monspecs.modedb_len,
1320                                    NULL, info->var.bits_per_pixel);
1321                 if (!rc || rc == 4) {
1322                         rc = -EINVAL;
1323                         dev_err(info->device, "mode %s not found\n", mode_option);
1324                         fb_destroy_modedb(info->monspecs.modedb);
1325                         info->monspecs.modedb = NULL;
1326                         goto err_find_mode;
1327                 }
1328         }
1330         fb_destroy_modedb(info->monspecs.modedb);
1331         info->monspecs.modedb = NULL;
1333         /* maximize virtual vertical size for fast scrolling */
1334         info->var.yres_virtual = info->fix.smem_len * 8 /
1335                         (info->var.bits_per_pixel * info->var.xres_virtual);
1336         if (info->var.yres_virtual < info->var.yres) {
1337                 dev_err(info->device, "virtual vertical size smaller than real\n");
1338                 rc = -EINVAL;
1339                 goto err_find_mode;
1340         }
1342         rc = fb_alloc_cmap(&info->cmap, 256, 0);
1343         if (rc < 0) {
1344                 dev_err(info->device, "cannot allocate colormap\n");
1345                 goto err_alloc_cmap;
1346         }
1348         rc = register_framebuffer(info);
1349         if (rc < 0) {
1350                 dev_err(info->device, "cannot register framebuffer\n");
1351                 goto err_reg_fb;
1352         }
1354         fb_info(info, "%s on %s, %d MB RAM, %d MHz MCLK\n",
1355                 info->fix.id, pci_name(dev),
1356                 info->fix.smem_len >> 20, (par->mclk_freq + 500) / 1000);
1358         if (par->chip == CHIP_UNKNOWN)
1359                 fb_info(info, "unknown chip, CR2D=%x, CR2E=%x, CRT2F=%x, CRT30=%x\n",
1360                         vga_rcrt(par->state.vgabase, 0x2d),
1361                         vga_rcrt(par->state.vgabase, 0x2e),
1362                         vga_rcrt(par->state.vgabase, 0x2f),
1363                         vga_rcrt(par->state.vgabase, 0x30));
1365         /* Record a reference to the driver data */
1366         pci_set_drvdata(dev, info);
1368 #ifdef CONFIG_MTRR
1369         if (mtrr) {
1370                 par->mtrr_reg = -1;
1371                 par->mtrr_reg = mtrr_add(info->fix.smem_start, info->fix.smem_len, MTRR_TYPE_WRCOMB, 1);
1372         }
1373 #endif
1375         return 0;
1377         /* Error handling */
1378 err_reg_fb:
1379         fb_dealloc_cmap(&info->cmap);
1380 err_alloc_cmap:
1381 err_find_mode:
1382 #ifdef CONFIG_FB_S3_DDC
1383         if (par->ddc_registered)
1384                 i2c_del_adapter(&par->ddc_adapter);
1385         if (par->mmio)
1386                 iounmap(par->mmio);
1387 #endif
1388         pci_iounmap(dev, info->screen_base);
1389 err_iomap:
1390         pci_release_regions(dev);
1391 err_request_regions:
1392 /*      pci_disable_device(dev); */
1393 err_enable_device:
1394         framebuffer_release(info);
1395         return rc;
1399 /* PCI remove */
1401 static void s3_pci_remove(struct pci_dev *dev)
1403         struct fb_info *info = pci_get_drvdata(dev);
1404         struct s3fb_info __maybe_unused *par = info->par;
1406         if (info) {
1408 #ifdef CONFIG_MTRR
1409                 if (par->mtrr_reg >= 0) {
1410                         mtrr_del(par->mtrr_reg, 0, 0);
1411                         par->mtrr_reg = -1;
1412                 }
1413 #endif
1415                 unregister_framebuffer(info);
1416                 fb_dealloc_cmap(&info->cmap);
1418 #ifdef CONFIG_FB_S3_DDC
1419                 if (par->ddc_registered)
1420                         i2c_del_adapter(&par->ddc_adapter);
1421                 if (par->mmio)
1422                         iounmap(par->mmio);
1423 #endif
1425                 pci_iounmap(dev, info->screen_base);
1426                 pci_release_regions(dev);
1427 /*              pci_disable_device(dev); */
1429                 framebuffer_release(info);
1430         }
1433 /* PCI suspend */
1435 static int s3_pci_suspend(struct pci_dev* dev, pm_message_t state)
1437         struct fb_info *info = pci_get_drvdata(dev);
1438         struct s3fb_info *par = info->par;
1440         dev_info(info->device, "suspend\n");
1442         console_lock();
1443         mutex_lock(&(par->open_lock));
1445         if ((state.event == PM_EVENT_FREEZE) || (par->ref_count == 0)) {
1446                 mutex_unlock(&(par->open_lock));
1447                 console_unlock();
1448                 return 0;
1449         }
1451         fb_set_suspend(info, 1);
1453         pci_save_state(dev);
1454         pci_disable_device(dev);
1455         pci_set_power_state(dev, pci_choose_state(dev, state));
1457         mutex_unlock(&(par->open_lock));
1458         console_unlock();
1460         return 0;
1464 /* PCI resume */
1466 static int s3_pci_resume(struct pci_dev* dev)
1468         struct fb_info *info = pci_get_drvdata(dev);
1469         struct s3fb_info *par = info->par;
1470         int err;
1472         dev_info(info->device, "resume\n");
1474         console_lock();
1475         mutex_lock(&(par->open_lock));
1477         if (par->ref_count == 0) {
1478                 mutex_unlock(&(par->open_lock));
1479                 console_unlock();
1480                 return 0;
1481         }
1483         pci_set_power_state(dev, PCI_D0);
1484         pci_restore_state(dev);
1485         err = pci_enable_device(dev);
1486         if (err) {
1487                 mutex_unlock(&(par->open_lock));
1488                 console_unlock();
1489                 dev_err(info->device, "error %d enabling device for resume\n", err);
1490                 return err;
1491         }
1492         pci_set_master(dev);
1494         s3fb_set_par(info);
1495         fb_set_suspend(info, 0);
1497         mutex_unlock(&(par->open_lock));
1498         console_unlock();
1500         return 0;
1504 /* List of boards that we are trying to support */
1506 static struct pci_device_id s3_devices[] = {
1507         {PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8810), .driver_data = CHIP_XXX_TRIO},
1508         {PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8811), .driver_data = CHIP_XXX_TRIO},
1509         {PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8812), .driver_data = CHIP_M65_AURORA64VP},
1510         {PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8814), .driver_data = CHIP_767_TRIO64UVP},
1511         {PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8901), .driver_data = CHIP_XXX_TRIO64V2_DXGX},
1512         {PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8902), .driver_data = CHIP_551_PLATO_PX},
1514         {PCI_DEVICE(PCI_VENDOR_ID_S3, 0x5631), .driver_data = CHIP_325_VIRGE},
1515         {PCI_DEVICE(PCI_VENDOR_ID_S3, 0x883D), .driver_data = CHIP_988_VIRGE_VX},
1516         {PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8A01), .driver_data = CHIP_XXX_VIRGE_DXGX},
1517         {PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8A10), .driver_data = CHIP_357_VIRGE_GX2},
1518         {PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8A11), .driver_data = CHIP_359_VIRGE_GX2P},
1519         {PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8A12), .driver_data = CHIP_359_VIRGE_GX2P},
1520         {PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8A13), .driver_data = CHIP_36X_TRIO3D_1X_2X},
1521         {PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8904), .driver_data = CHIP_365_TRIO3D},
1522         {PCI_DEVICE(PCI_VENDOR_ID_S3, 0x8C01), .driver_data = CHIP_260_VIRGE_MX},
1524         {0, 0, 0, 0, 0, 0, 0}
1525 };
1528 MODULE_DEVICE_TABLE(pci, s3_devices);
1530 static struct pci_driver s3fb_pci_driver = {
1531         .name           = "s3fb",
1532         .id_table       = s3_devices,
1533         .probe          = s3_pci_probe,
1534         .remove         = s3_pci_remove,
1535         .suspend        = s3_pci_suspend,
1536         .resume         = s3_pci_resume,
1537 };
1539 /* Parse user specified options */
1541 #ifndef MODULE
1542 static int  __init s3fb_setup(char *options)
1544         char *opt;
1546         if (!options || !*options)
1547                 return 0;
1549         while ((opt = strsep(&options, ",")) != NULL) {
1551                 if (!*opt)
1552                         continue;
1553 #ifdef CONFIG_MTRR
1554                 else if (!strncmp(opt, "mtrr:", 5))
1555                         mtrr = simple_strtoul(opt + 5, NULL, 0);
1556 #endif
1557                 else if (!strncmp(opt, "fasttext:", 9))
1558                         fasttext = simple_strtoul(opt + 9, NULL, 0);
1559                 else
1560                         mode_option = opt;
1561         }
1563         return 0;
1565 #endif
1567 /* Cleanup */
1569 static void __exit s3fb_cleanup(void)
1571         pr_debug("s3fb: cleaning up\n");
1572         pci_unregister_driver(&s3fb_pci_driver);
1575 /* Driver Initialisation */
1577 static int __init s3fb_init(void)
1580 #ifndef MODULE
1581         char *option = NULL;
1583         if (fb_get_options("s3fb", &option))
1584                 return -ENODEV;
1585         s3fb_setup(option);
1586 #endif
1588         pr_debug("s3fb: initializing\n");
1589         return pci_register_driver(&s3fb_pci_driver);
1592 /* ------------------------------------------------------------------------- */
1594 /* Modularization */
1596 module_init(s3fb_init);
1597 module_exit(s3fb_cleanup);