[s3c24xx] glamo: The cell can rely on being a child of the core. Use it for
[openwrt.git] / target / linux / s3c24xx / files-2.6.30 / drivers / mfd / glamo / glamo-fb.c
1 /* Smedia Glamo 336x/337x driver
2  *
3  * (C) 2007-2008 by Openmoko, Inc.
4  * Author: Harald Welte <laforge@openmoko.org>
5  * All rights reserved.
6  *
7  * This program is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU General Public License as
9  * published by the Free Software Foundation; either version 2 of
10  * the License, or (at your option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
20  * MA 02111-1307 USA
21  */
22
23 #include <linux/module.h>
24 #include <linux/kernel.h>
25 #include <linux/string.h>
26 #include <linux/mm.h>
27 #include <linux/delay.h>
28 #include <linux/fb.h>
29 #include <linux/init.h>
30 #include <linux/platform_device.h>
31 #include <linux/spinlock.h>
32 #include <linux/io.h>
33 #include <linux/mfd/glamo.h>
34
35 #include <asm/div64.h>
36
37 #ifdef CONFIG_PM
38 #include <linux/pm.h>
39 #endif
40
41 #include <linux/glamofb.h>
42
43 #include "glamo-regs.h"
44 #include "glamo-core.h"
45
46 static void glamofb_program_mode(struct glamofb_handle* glamo);
47
48 struct glamofb_handle {
49         struct glamo_core *core;
50         struct fb_info *fb;
51         struct device *dev;
52         struct resource *reg;
53         struct resource *fb_res;
54         char __iomem *base;
55         struct glamo_fb_platform_data *mach_info;
56         char __iomem *cursor_addr;
57         int cursor_on;
58         u_int32_t pseudo_pal[16];
59         spinlock_t lock_cmd;
60         int blank_mode;
61         int mode_set; /* 0 if the current display mode hasn't been set on the glamo */
62         int output_enabled; /* 0 if the video output is disabled */
63 };
64
65 static void glamo_output_enable(struct glamofb_handle *gfb) {
66         struct glamo_core *gcore = gfb->core;
67
68         if (gfb->output_enabled)
69                 return;
70
71         /* enable the pixel clock if off */
72         glamo_engine_clkreg_set(gcore,
73                 GLAMO_ENGINE_LCD,
74                 GLAMO_CLOCK_LCD_EN_DCLK,
75                 GLAMO_CLOCK_LCD_EN_DCLK);
76
77         gfb->output_enabled = 1;
78         if (!gfb->mode_set)
79                 glamofb_program_mode(gfb);
80 }
81
82 static void glamo_output_disable(struct glamofb_handle *gfb) {
83         struct glamo_core *gcore = gfb->core;
84
85         if (!gfb->output_enabled)
86                 return;
87
88         /* enable the pixel clock if off */
89         glamo_engine_clkreg_set(gcore,
90                 GLAMO_ENGINE_LCD,
91                 GLAMO_CLOCK_LCD_EN_DCLK,
92                 0);
93
94         gfb->output_enabled = 0;
95 }
96
97
98 static int reg_read(struct glamofb_handle *glamo,
99                            u_int16_t reg)
100 {
101         int i = 0;
102
103         for (i = 0; i != 2; i++)
104                 nop();
105
106         return readw(glamo->base + reg);
107 }
108
109 static void reg_write(struct glamofb_handle *glamo,
110                              u_int16_t reg, u_int16_t val)
111 {
112         int i = 0;
113
114         for (i = 0; i != 2; i++)
115                 nop();
116
117         writew(val, glamo->base + reg);
118 }
119
120 static struct glamo_script glamo_regs[] = {
121         { GLAMO_REG_LCD_MODE1, 0x0020 },
122         /* no display rotation, no hardware cursor, no dither, no gamma,
123          * no retrace flip, vsync low-active, hsync low active,
124          * no TVCLK, no partial display, hw dest color from fb,
125          * no partial display mode, LCD1, software flip,  */
126         { GLAMO_REG_LCD_MODE2, 0x9020 },
127           /* video flip, no ptr, no ptr, dhclk off,
128            * normal mode,  no cpuif,
129            * res, serial msb first, single fb, no fr ctrl,
130            * cpu if bits all zero, no crc
131            * 0000 0000 0010  0000 */
132         { GLAMO_REG_LCD_MODE3, 0x0b40 },
133           /* src data rgb565, res, 18bit rgb666
134            * 000 01 011 0100 0000 */
135         { GLAMO_REG_LCD_POLARITY, 0x440c },
136           /* DE high active, no cpu/lcd if, cs0 force low, a0 low active,
137            * np cpu if, 9bit serial data, sclk rising edge latch data
138            * 01 00 0 100 0 000 01 0 0 */
139         /* The following values assume 640*480@16bpp */
140         { GLAMO_REG_LCD_A_BASE1, 0x0000 }, /* display A base address 15:0 */
141         { GLAMO_REG_LCD_A_BASE2, 0x0000 }, /* display A base address 22:16 */
142         { GLAMO_REG_LCD_CURSOR_BASE1, 0xC000 }, /* cursor base address 15:0 */
143         { GLAMO_REG_LCD_CURSOR_BASE2, 0x0012 }, /* cursor base address 22:16 */
144         { GLAMO_REG_LCD_COMMAND2, 0x0000 }, /* display page A */
145 };
146
147 static int glamofb_run_script(struct glamofb_handle *glamo,
148                                 struct glamo_script *script, int len)
149 {
150         int i;
151
152         if (glamo->core->suspending) {
153                 dev_err(&glamo->core->pdev->dev,
154                                 "IGNORING glamofb_run_script while "
155                                                                  "suspended\n");
156                 return -EBUSY;
157         }
158
159         for (i = 0; i < len; i++) {
160                 struct glamo_script *line = &script[i];
161
162                 if (line->reg == 0xffff)
163                         return 0;
164                 else if (line->reg == 0xfffe)
165                         msleep(line->val);
166                 else
167                         reg_write(glamo, script[i].reg, script[i].val);
168         }
169
170         return 0;
171 }
172
173 static int glamofb_check_var(struct fb_var_screeninfo *var,
174                              struct fb_info *info)
175 {
176         struct glamofb_handle *glamo = info->par;
177
178         if (glamo->core->suspending) {
179                 dev_err(&glamo->core->pdev->dev,
180                                 "IGNORING glamofb_check_var while "
181                                                                  "suspended\n");
182                 return -EBUSY;
183         }
184
185         if (var->bits_per_pixel != 16)
186                 var->bits_per_pixel = 16;
187
188         var->height = glamo->mach_info->height;
189         var->width = glamo->mach_info->width;
190
191         /* FIXME: set rgb positions */
192         switch (var->bits_per_pixel) {
193         case 16:
194                 switch (reg_read(glamo, GLAMO_REG_LCD_MODE3) & 0xc000) {
195                 case GLAMO_LCD_SRC_RGB565:
196                         var->red.offset         = 11;
197                         var->green.offset       = 5;
198                         var->blue.offset        = 0;
199                         var->red.length         = 5;
200                         var->green.length       = 6;
201                         var->blue.length        = 5;
202                         var->transp.length      = 0;
203                         break;
204                 case GLAMO_LCD_SRC_ARGB1555:
205                         var->transp.offset      = 15;
206                         var->red.offset         = 10;
207                         var->green.offset       = 5;
208                         var->blue.offset        = 0;
209                         var->transp.length      = 1;
210                         var->red.length         = 5;
211                         var->green.length       = 5;
212                         var->blue.length        = 5;
213                         break;
214                 case GLAMO_LCD_SRC_ARGB4444:
215                         var->transp.offset      = 12;
216                         var->red.offset         = 8;
217                         var->green.offset       = 4;
218                         var->blue.offset        = 0;
219                         var->transp.length      = 4;
220                         var->red.length         = 4;
221                         var->green.length       = 4;
222                         var->blue.length        = 4;
223                         break;
224                 }
225                 break;
226         case 24:
227         case 32:
228         default:
229                 /* The Smedia Glamo doesn't support anything but 16bit color */
230                 printk(KERN_ERR
231                        "Smedia driver does not [yet?] support 24/32bpp\n");
232                 return -EINVAL;
233         }
234
235         return 0;
236 }
237
238 static void reg_set_bit_mask(struct glamofb_handle *glamo,
239                              u_int16_t reg, u_int16_t mask,
240                              u_int16_t val)
241 {
242         u_int16_t tmp;
243
244         val &= mask;
245
246         tmp = reg_read(glamo, reg);
247         tmp &= ~mask;
248         tmp |= val;
249         reg_write(glamo, reg, tmp);
250 }
251
252 #define GLAMO_LCD_WIDTH_MASK 0x03FF
253 #define GLAMO_LCD_HEIGHT_MASK 0x03FF
254 #define GLAMO_LCD_PITCH_MASK 0x07FE
255 #define GLAMO_LCD_HV_TOTAL_MASK 0x03FF
256 #define GLAMO_LCD_HV_RETR_START_MASK 0x03FF
257 #define GLAMO_LCD_HV_RETR_END_MASK 0x03FF
258 #define GLAMO_LCD_HV_RETR_DISP_START_MASK 0x03FF
259 #define GLAMO_LCD_HV_RETR_DISP_END_MASK 0x03FF
260
261 /* the caller has to enxure lock_cmd is held and we are in cmd mode */
262 static void __rotate_lcd(struct glamofb_handle *glamo, __u32 rotation)
263 {
264         int glamo_rot;
265
266         if (glamo->core->suspending) {
267                 dev_err(&glamo->core->pdev->dev,
268                                 "IGNORING rotate_lcd while "
269                                                                  "suspended\n");
270                 return;
271         }
272
273         switch (rotation) {
274         case FB_ROTATE_CW:
275                 glamo_rot = GLAMO_LCD_ROT_MODE_90;
276                 break;
277         case FB_ROTATE_UD:
278                 glamo_rot = GLAMO_LCD_ROT_MODE_180;
279                 break;
280         case FB_ROTATE_CCW:
281                 glamo_rot = GLAMO_LCD_ROT_MODE_270;
282                 break;
283         default:
284                 glamo_rot = GLAMO_LCD_ROT_MODE_0;
285                 break;
286         }
287
288         reg_set_bit_mask(glamo,
289                          GLAMO_REG_LCD_WIDTH,
290                          GLAMO_LCD_ROT_MODE_MASK,
291                          glamo_rot);
292         reg_set_bit_mask(glamo,
293                          GLAMO_REG_LCD_MODE1,
294                          GLAMO_LCD_MODE1_ROTATE_EN,
295                          (glamo_rot != GLAMO_LCD_ROT_MODE_0) ?
296                                  GLAMO_LCD_MODE1_ROTATE_EN : 0);
297 }
298
299 static void glamofb_program_mode(struct glamofb_handle* gfb) {
300         int sync, bp, disp, fp, total;
301         unsigned long flags;
302         struct glamo_core *gcore = gfb->core;
303         struct fb_var_screeninfo *var = &gfb->fb->var;
304
305         dev_dbg(&gcore->pdev->dev,
306                           "glamofb_program_mode spin_lock_irqsave\n");
307         spin_lock_irqsave(&gfb->lock_cmd, flags);
308
309         if (glamofb_cmd_mode(gfb, 1))
310                 goto out_unlock;
311
312         if (var->pixclock)
313                 glamo_engine_reclock(gcore,
314                                      GLAMO_ENGINE_LCD,
315                                      (1000000000UL / gfb->fb->var.pixclock) * 1000);
316
317         reg_set_bit_mask(gfb,
318                          GLAMO_REG_LCD_WIDTH,
319                          GLAMO_LCD_WIDTH_MASK,
320                          var->xres);
321         reg_set_bit_mask(gfb,
322                          GLAMO_REG_LCD_HEIGHT,
323                          GLAMO_LCD_HEIGHT_MASK,
324                          var->yres);
325         reg_set_bit_mask(gfb,
326                          GLAMO_REG_LCD_PITCH,
327                          GLAMO_LCD_PITCH_MASK,
328                          gfb->fb->fix.line_length);
329
330         /* honour the rotation request */
331         __rotate_lcd(gfb, var->rotate);
332
333         /* update scannout timings */
334         sync = 0;
335         bp = sync + var->hsync_len;
336         disp = bp + var->left_margin;
337         fp = disp + var->xres;
338         total = fp + var->right_margin;
339
340         reg_set_bit_mask(gfb, GLAMO_REG_LCD_HORIZ_TOTAL,
341                          GLAMO_LCD_HV_TOTAL_MASK, total);
342         reg_set_bit_mask(gfb, GLAMO_REG_LCD_HORIZ_RETR_START,
343                          GLAMO_LCD_HV_RETR_START_MASK, sync);
344         reg_set_bit_mask(gfb, GLAMO_REG_LCD_HORIZ_RETR_END,
345                          GLAMO_LCD_HV_RETR_END_MASK, bp);
346         reg_set_bit_mask(gfb, GLAMO_REG_LCD_HORIZ_DISP_START,
347                           GLAMO_LCD_HV_RETR_DISP_START_MASK, disp);
348         reg_set_bit_mask(gfb, GLAMO_REG_LCD_HORIZ_DISP_END,
349                          GLAMO_LCD_HV_RETR_DISP_END_MASK, fp);
350
351         sync = 0;
352         bp = sync + var->vsync_len;
353         disp = bp + var->upper_margin;
354         fp = disp + var->yres;
355         total = fp + var->lower_margin;
356
357         reg_set_bit_mask(gfb, GLAMO_REG_LCD_VERT_TOTAL,
358                          GLAMO_LCD_HV_TOTAL_MASK, total);
359         reg_set_bit_mask(gfb, GLAMO_REG_LCD_VERT_RETR_START,
360                           GLAMO_LCD_HV_RETR_START_MASK, sync);
361         reg_set_bit_mask(gfb, GLAMO_REG_LCD_VERT_RETR_END,
362                          GLAMO_LCD_HV_RETR_END_MASK, bp);
363         reg_set_bit_mask(gfb, GLAMO_REG_LCD_VERT_DISP_START,
364                          GLAMO_LCD_HV_RETR_DISP_START_MASK, disp);
365         reg_set_bit_mask(gfb, GLAMO_REG_LCD_VERT_DISP_END,
366                          GLAMO_LCD_HV_RETR_DISP_END_MASK, fp);
367
368         glamofb_cmd_mode(gfb, 0);
369
370         gfb->mode_set = 1;
371
372 out_unlock:
373         dev_dbg(&gcore->pdev->dev,
374                       "glamofb_program_mode spin_unlock_irqrestore\n");
375         spin_unlock_irqrestore(&gfb->lock_cmd, flags);
376 }
377
378
379 static int glamofb_pan_display(struct fb_var_screeninfo *var,
380                 struct fb_info *info)
381 {
382         return 0;
383 }
384
385 static struct fb_videomode *glamofb_find_mode(struct fb_info *info,
386         struct fb_var_screeninfo *var) {
387         struct glamofb_handle *glamo = info->par;
388         struct glamo_fb_platform_data *mach_info = glamo->mach_info;
389         struct fb_videomode *mode;
390         int i;
391
392         for(i = mach_info->num_modes, mode = mach_info->modes; i > 0; --i, ++mode) {
393                 if (mode->xres == var->xres &&
394                     mode->yres == var->yres)
395                         return mode;
396         }
397
398         return NULL;
399 }
400
401 static int glamofb_set_par(struct fb_info *info)
402 {
403         struct glamofb_handle *glamo = info->par;
404         struct fb_var_screeninfo *var = &info->var;
405         struct fb_videomode *mode;
406
407         if (glamo->core->suspending) {
408                 dev_err(&glamo->core->pdev->dev,
409                                 "IGNORING glamofb_set_par while "
410                                                                  "suspended\n");
411                 return -EBUSY;
412         }
413
414         mode = glamofb_find_mode(info, var);
415         if (!mode)
416                 return -EINVAL;
417
418         fb_videomode_to_var(var, mode);
419
420         info->mode = mode;
421
422         glamo->mode_set = 0;
423
424         switch(var->rotate) {
425         case FB_ROTATE_CW:
426         case FB_ROTATE_CCW:
427                 info->fix.line_length = (var->yres * var->bits_per_pixel) / 8;
428                 /* FIXME: Limit pixelclock */
429                 var->pixclock *= 2;
430                 break;
431         default:
432                 info->fix.line_length = (var->xres * var->bits_per_pixel) / 8;
433                 break;
434         }
435
436         if(glamo->output_enabled)
437                 glamofb_program_mode(glamo);
438
439         return 0;
440 }
441
442 static int glamofb_blank(int blank_mode, struct fb_info *info)
443 {
444         struct glamofb_handle *gfb = info->par;
445
446         dev_dbg(gfb->dev, "glamofb_blank(%u)\n", blank_mode);
447
448         switch (blank_mode) {
449         case FB_BLANK_VSYNC_SUSPEND:
450         case FB_BLANK_HSYNC_SUSPEND:
451                 /* FIXME: add pdata hook/flag to indicate whether
452                  * we should already switch off pixel clock here */
453                 break;
454         case FB_BLANK_POWERDOWN:
455                 /* disable the pixel clock */
456                 glamo_output_disable(gfb);
457                 gfb->blank_mode = blank_mode;
458                 break;
459         case FB_BLANK_UNBLANK:
460         case FB_BLANK_NORMAL:
461                 glamo_output_enable(gfb);
462                 gfb->blank_mode = blank_mode;
463                 break;
464         }
465
466         /* FIXME: once we have proper clock management in glamo-core,
467          * we can determine if other units need MCLK1 or the PLL, and
468          * disable it if not used. */
469         return 0;
470 }
471
472 static inline unsigned int chan_to_field(unsigned int chan,
473                                          struct fb_bitfield *bf)
474 {
475         chan &= 0xffff;
476         chan >>= 16 - bf->length;
477         return chan << bf->offset;
478 }
479
480 static int glamofb_setcolreg(unsigned regno,
481                              unsigned red, unsigned green, unsigned blue,
482                              unsigned transp, struct fb_info *info)
483 {
484         struct glamofb_handle *glamo = info->par;
485         unsigned int val;
486
487         if (glamo->core->suspending) {
488                 dev_err(&glamo->core->pdev->dev,
489                                 "IGNORING glamofb_set_par while "
490                                                                  "suspended\n");
491                 return -EBUSY;
492         }
493
494         switch (glamo->fb->fix.visual) {
495         case FB_VISUAL_TRUECOLOR:
496         case FB_VISUAL_DIRECTCOLOR:
497                 /* true-colour, use pseuo-palette */
498
499                 if (regno < 16) {
500                         u32 *pal = glamo->fb->pseudo_palette;
501
502                         val  = chan_to_field(red, &glamo->fb->var.red);
503                         val |= chan_to_field(green, &glamo->fb->var.green);
504                         val |= chan_to_field(blue, &glamo->fb->var.blue);
505
506                         pal[regno] = val;
507                 };
508                 break;
509         default:
510                 return 1; /* unknown type */
511         }
512
513         return 0;
514 }
515
516 static int glamofb_ioctl(struct fb_info *info, unsigned int cmd,
517                          unsigned long arg) {
518         struct glamofb_handle *gfb = (struct glamofb_handle*)info->par;
519         struct glamo_core *gcore = gfb->core;
520         int retval = -ENOTTY;
521
522         switch (cmd) {
523         case GLAMOFB_ENGINE_ENABLE:
524                 retval = glamo_engine_enable(gcore, arg);
525                 break;
526         case GLAMOFB_ENGINE_DISABLE:
527                 retval = glamo_engine_disable(gcore, arg);
528                 break;
529         case GLAMOFB_ENGINE_RESET:
530                 glamo_engine_reset(gcore, arg);
531                 retval = 0;
532                 break;
533         default:
534                 break;
535         }
536
537         return retval;
538 }
539
540
541 #ifdef CONFIG_MFD_GLAMO_HWACCEL
542 static inline void glamofb_vsync_wait(struct glamofb_handle *glamo,
543                 int line, int size, int range)
544 {
545         int count[2];
546
547         do {
548                 count[0] = reg_read(glamo, GLAMO_REG_LCD_STATUS2) & 0x3ff;
549                 count[1] = reg_read(glamo, GLAMO_REG_LCD_STATUS2) & 0x3ff;
550         } while (count[0] != count[1] ||
551                         (line < count[0] + range &&
552                          size > count[0] - range) ||
553                         count[0] < range * 2);
554 }
555
556 /*
557  * Enable/disable the hardware cursor mode altogether
558  * (for blinking and such, use glamofb_cursor()).
559  */
560 static void glamofb_cursor_onoff(struct glamofb_handle *glamo, int on)
561 {
562         int y, size;
563
564         if (glamo->cursor_on) {
565                 y = reg_read(glamo, GLAMO_REG_LCD_CURSOR_Y_POS);
566                 size = reg_read(glamo, GLAMO_REG_LCD_CURSOR_Y_SIZE);
567
568                 glamofb_vsync_wait(glamo, y, size, 30);
569         }
570
571         reg_set_bit_mask(glamo, GLAMO_REG_LCD_MODE1,
572                         GLAMO_LCD_MODE1_CURSOR_EN,
573                         on ? GLAMO_LCD_MODE1_CURSOR_EN : 0);
574         glamo->cursor_on = on;
575
576         /* Hide the cursor by default */
577         reg_write(glamo, GLAMO_REG_LCD_CURSOR_X_SIZE, 0);
578 }
579
580 static int glamofb_cursor(struct fb_info *info, struct fb_cursor *cursor)
581 {
582         struct glamofb_handle *glamo = info->par;
583         unsigned long flags;
584
585         spin_lock_irqsave(&glamo->lock_cmd, flags);
586
587         reg_write(glamo, GLAMO_REG_LCD_CURSOR_X_SIZE,
588                         cursor->enable ? cursor->image.width : 0);
589
590         if (cursor->set & FB_CUR_SETPOS) {
591                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_X_POS,
592                           cursor->image.dx);
593                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_Y_POS,
594                           cursor->image.dy);
595         }
596
597         if (cursor->set & FB_CUR_SETCMAP) {
598                 uint16_t fg = glamo->pseudo_pal[cursor->image.fg_color];
599                 uint16_t bg = glamo->pseudo_pal[cursor->image.bg_color];
600
601                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_FG_COLOR, fg);
602                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_BG_COLOR, bg);
603                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_DST_COLOR, fg);
604         }
605
606         if (cursor->set & FB_CUR_SETHOT)
607                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_PRESET,
608                                 (cursor->hot.x << 8) | cursor->hot.y);
609
610         if ((cursor->set & FB_CUR_SETSIZE) ||
611             (cursor->set & (FB_CUR_SETIMAGE | FB_CUR_SETSHAPE))) {
612                 int x, y, pitch, op;
613                 const uint8_t *pcol = cursor->image.data;
614                 const uint8_t *pmsk = cursor->mask;
615                 uint8_t __iomem *dst = glamo->cursor_addr;
616                 uint8_t dcol = 0;
617                 uint8_t dmsk = 0;
618                 uint8_t byte = 0;
619
620                 if (cursor->image.depth > 1) {
621                         spin_unlock_irqrestore(&glamo->lock_cmd, flags);
622                         return -EINVAL;
623                 }
624
625                 pitch = ((cursor->image.width + 7) >> 2) & ~1;
626                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_PITCH,
627                         pitch);
628                 reg_write(glamo, GLAMO_REG_LCD_CURSOR_Y_SIZE,
629                         cursor->image.height);
630
631                 for (y = 0; y < cursor->image.height; y++) {
632                         byte = 0;
633                         for (x = 0; x < cursor->image.width; x++) {
634                                 if ((x % 8) == 0) {
635                                         dcol = *pcol++;
636                                         dmsk = *pmsk++;
637                                 } else {
638                                         dcol >>= 1;
639                                         dmsk >>= 1;
640                                 }
641
642                                 if (cursor->rop == ROP_COPY)
643                                         op = (dmsk & 1) ?
644                                                 (dcol & 1) ? 1 : 3 : 0;
645                                 else
646                                         op = ((dmsk & 1) << 1) |
647                                                 ((dcol & 1) << 0);
648                                 byte |= op << ((x & 3) << 1);
649
650                                 if (x % 4 == 3) {
651                                         writeb(byte, dst + x / 4);
652                                         byte = 0;
653                                 }
654                         }
655                         if (x % 4) {
656                                 writeb(byte, dst + x / 4);
657                                 byte = 0;
658                         }
659
660                         dst += pitch;
661                 }
662         }
663
664         spin_unlock_irqrestore(&glamo->lock_cmd, flags);
665
666         return 0;
667 }
668 #endif
669
670 static inline int glamofb_cmdq_empty(struct glamofb_handle *gfb)
671 {
672         /* DGCMdQempty -- 1 == command queue is empty */
673         return reg_read(gfb, GLAMO_REG_LCD_STATUS1) & (1 << 15);
674 }
675
676 /* call holding gfb->lock_cmd  when locking, until you unlock */
677 int glamofb_cmd_mode(struct glamofb_handle *gfb, int on)
678 {
679         int timeout = 2000000;
680
681         if (gfb->core->suspending) {
682                 dev_err(&gfb->core->pdev->dev,
683                                 "IGNORING glamofb_cmd_mode while "
684                                                                  "suspended\n");
685                 return -EBUSY;
686         }
687
688         dev_dbg(gfb->dev, "glamofb_cmd_mode(gfb=%p, on=%d)\n", gfb, on);
689         if (on) {
690                 dev_dbg(gfb->dev, "%s: waiting for cmdq empty: ",
691                         __func__);
692                 while ((!glamofb_cmdq_empty(gfb)) && (timeout--))
693                         cpu_relax();
694                 if (timeout < 0) {
695                         printk(KERN_ERR"*************"
696                                        "glamofb cmd_queue never got empty"
697                                        "*************\n");
698                         return -EIO;
699                 }
700                 dev_dbg(gfb->dev, "empty!\n");
701
702                 /* display the entire frame then switch to command */
703                 reg_write(gfb, GLAMO_REG_LCD_COMMAND1,
704                           GLAMO_LCD_CMD_TYPE_DISP |
705                           GLAMO_LCD_CMD_DATA_FIRE_VSYNC);
706
707                 /* wait until lcd idle */
708                 dev_dbg(gfb->dev, "waiting for lcd idle: ");
709                 timeout = 2000000;
710                 while ((!reg_read(gfb, GLAMO_REG_LCD_STATUS2) & (1 << 12)) &&
711                       (timeout--))
712                         cpu_relax();
713                 if (timeout < 0) {
714                         printk(KERN_ERR"*************"
715                                        "glamofb lcd never idle"
716                                        "*************\n");
717                         return -EIO;
718                 }
719
720                 mdelay(100);
721
722                 dev_dbg(gfb->dev, "cmd mode entered\n");
723
724         } else {
725                 /* RGB interface needs vsync/hsync */
726                 if (reg_read(gfb, GLAMO_REG_LCD_MODE3) & GLAMO_LCD_MODE3_RGB)
727                         reg_write(gfb, GLAMO_REG_LCD_COMMAND1,
728                                   GLAMO_LCD_CMD_TYPE_DISP |
729                                   GLAMO_LCD_CMD_DATA_DISP_SYNC);
730
731                 reg_write(gfb, GLAMO_REG_LCD_COMMAND1,
732                           GLAMO_LCD_CMD_TYPE_DISP |
733                           GLAMO_LCD_CMD_DATA_DISP_FIRE);
734         }
735
736         return 0;
737 }
738 EXPORT_SYMBOL_GPL(glamofb_cmd_mode);
739
740
741 int glamofb_cmd_write(struct glamofb_handle *gfb, u_int16_t val)
742 {
743         int timeout = 200000;
744
745         if (gfb->core->suspending) {
746                 dev_err(&gfb->core->pdev->dev,
747                                 "IGNORING glamofb_cmd_write while "
748                                                                  "suspended\n");
749                 return -EBUSY;
750         }
751
752         dev_dbg(gfb->dev, "%s: waiting for cmdq empty\n", __func__);
753         while ((!glamofb_cmdq_empty(gfb)) && (timeout--))
754                 yield();
755         if (timeout < 0) {
756                 printk(KERN_ERR"*************"
757                                 "glamofb cmd_queue never got empty"
758                                 "*************\n");
759                 return 1;
760         }
761         dev_dbg(gfb->dev, "idle, writing 0x%04x\n", val);
762
763         reg_write(gfb, GLAMO_REG_LCD_COMMAND1, val);
764
765         return 0;
766 }
767 EXPORT_SYMBOL_GPL(glamofb_cmd_write);
768
769 static struct fb_ops glamofb_ops = {
770         .owner          = THIS_MODULE,
771         .fb_check_var   = glamofb_check_var,
772         .fb_pan_display = glamofb_pan_display,
773         .fb_set_par     = glamofb_set_par,
774         .fb_blank       = glamofb_blank,
775         .fb_setcolreg   = glamofb_setcolreg,
776         .fb_ioctl = glamofb_ioctl,
777 #ifdef CONFIG_MFD_GLAMO_HWACCEL
778         .fb_cursor      = glamofb_cursor,
779 #endif
780         .fb_fillrect    = cfb_fillrect,
781         .fb_copyarea    = cfb_copyarea,
782         .fb_imageblit   = cfb_imageblit,
783 };
784
785 static int glamofb_init_regs(struct glamofb_handle *glamo)
786 {
787         struct fb_info *info = glamo->fb;
788
789         glamofb_check_var(&info->var, info);
790         glamofb_run_script(glamo, glamo_regs, ARRAY_SIZE(glamo_regs));
791         glamofb_set_par(info);
792
793         return 0;
794 }
795
796 static int __init glamofb_probe(struct platform_device *pdev)
797 {
798         int rc = -EIO;
799         struct fb_info *fbinfo;
800         struct glamofb_handle *glamofb;
801         struct glamo_core *core = dev_get_drvdata(pdev->dev.parent);
802         struct glamo_fb_platform_data *mach_info;
803
804         printk(KERN_INFO "SMEDIA Glamo frame buffer driver (C) 2007 "
805                 "Openmoko, Inc.\n");
806
807         if (!core->pdata || !core->pdata->fb_data)
808                 return -ENOENT;
809
810
811         fbinfo = framebuffer_alloc(sizeof(struct glamofb_handle), &pdev->dev);
812         if (!fbinfo)
813                 return -ENOMEM;
814
815
816         glamofb = fbinfo->par;
817         glamofb->fb = fbinfo;
818         glamofb->dev = &pdev->dev;
819
820         glamofb->blank_mode = FB_BLANK_POWERDOWN;
821
822         strcpy(fbinfo->fix.id, "SMedia Glamo");
823
824         glamofb->reg = platform_get_resource_byname(pdev, IORESOURCE_MEM,
825                                                     "glamo-fb-regs");
826         if (!glamofb->reg) {
827                 dev_err(&pdev->dev, "platform device with no registers?\n");
828                 rc = -ENOENT;
829                 goto out_free;
830         }
831
832         glamofb->fb_res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
833                                                         "glamo-fb-mem");
834         if (!glamofb->fb_res) {
835                 dev_err(&pdev->dev, "platform device with no memory ?\n");
836                 rc = -ENOENT;
837                 goto out_free;
838         }
839
840         glamofb->reg = request_mem_region(glamofb->reg->start,
841                                           resource_size(glamofb->reg), pdev->name);
842         if (!glamofb->reg) {
843                 dev_err(&pdev->dev, "failed to request mmio region\n");
844                 goto out_free;
845         }
846
847         glamofb->fb_res = request_mem_region(glamofb->fb_res->start,
848                                              resource_size(glamofb->fb_res),
849                                              pdev->name);
850         if (!glamofb->fb_res) {
851                 dev_err(&pdev->dev, "failed to request vram region\n");
852                 goto out_release_reg;
853         }
854
855         /* we want to remap only the registers required for this core
856          * driver. */
857         glamofb->base = ioremap_nocache(glamofb->reg->start, resource_size(glamofb->reg));
858         if (!glamofb->base) {
859                 dev_err(&pdev->dev, "failed to ioremap() mmio memory\n");
860                 goto out_release_fb;
861         }
862
863         fbinfo->fix.smem_start = (unsigned long) glamofb->fb_res->start;
864         fbinfo->fix.smem_len = (__u32) resource_size(glamofb->fb_res);
865
866         fbinfo->screen_base = ioremap(glamofb->fb_res->start,
867                                        resource_size(glamofb->fb_res));
868         if (!fbinfo->screen_base) {
869                 dev_err(&pdev->dev, "failed to ioremap() vram memory\n");
870                 goto out_release_fb;
871         }
872         glamofb->cursor_addr = fbinfo->screen_base + 0x12C000;
873
874         platform_set_drvdata(pdev, glamofb);
875
876         mach_info = core->pdata->fb_data;
877         glamofb->core = core;
878         glamofb->mach_info = mach_info;
879
880         fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
881         fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
882         fbinfo->fix.type_aux = 0;
883         fbinfo->fix.xpanstep = 0;
884         fbinfo->fix.ypanstep = 0;
885         fbinfo->fix.ywrapstep = 0;
886         fbinfo->fix.accel = FB_ACCEL_GLAMO;
887
888
889         fbinfo->fbops = &glamofb_ops;
890         fbinfo->flags = FBINFO_FLAG_DEFAULT;
891         fbinfo->pseudo_palette = &glamofb->pseudo_pal;
892
893         fbinfo->mode = mach_info->modes;
894         fb_videomode_to_var(&fbinfo->var, fbinfo->mode);
895         fbinfo->var.bits_per_pixel = 16;
896         fbinfo->var.nonstd = 0;
897         fbinfo->var.activate = FB_ACTIVATE_NOW;
898         fbinfo->var.height = mach_info->height;
899         fbinfo->var.width = mach_info->width;
900         fbinfo->var.accel_flags = 0;
901         fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
902
903         glamo_engine_enable(core, GLAMO_ENGINE_LCD);
904         glamo_engine_reset(core, GLAMO_ENGINE_LCD);
905         glamofb->output_enabled = 1;
906         glamofb->mode_set = 1;
907
908         dev_info(&pdev->dev, "spin_lock_init\n");
909         spin_lock_init(&glamofb->lock_cmd);
910         glamofb_init_regs(glamofb);
911 #ifdef CONFIG_MFD_GLAMO_HWACCEL
912         glamofb_cursor_onoff(glamofb, 1);
913 #endif
914
915         fb_videomode_to_modelist(mach_info->modes, mach_info->num_modes,
916                                  &fbinfo->modelist);
917
918         rc = register_framebuffer(fbinfo);
919         if (rc < 0) {
920                 dev_err(&pdev->dev, "failed to register framebuffer\n");
921                 goto out_unmap_fb;
922         }
923
924         printk(KERN_INFO "fb%d: %s frame buffer device\n",
925                 fbinfo->node, fbinfo->fix.id);
926
927         return 0;
928
929 out_unmap_fb:
930         iounmap(fbinfo->screen_base);
931         iounmap(glamofb->base);
932 out_release_fb:
933         release_mem_region(glamofb->fb_res->start, resource_size(glamofb->fb_res));
934 out_release_reg:
935         release_mem_region(glamofb->reg->start, resource_size(glamofb->reg));
936 out_free:
937         framebuffer_release(fbinfo);
938         return rc;
939 }
940
941 static int glamofb_remove(struct platform_device *pdev)
942 {
943         struct glamofb_handle *glamofb = platform_get_drvdata(pdev);
944
945         platform_set_drvdata(pdev, NULL);
946         iounmap(glamofb->base);
947         release_mem_region(glamofb->reg->start, resource_size(glamofb->reg));
948         kfree(glamofb);
949
950         return 0;
951 }
952
953 #ifdef CONFIG_PM
954
955 static int glamofb_suspend(struct device *dev)
956 {
957         struct glamofb_handle *gfb = dev_get_drvdata(dev);
958
959         /* we need to stop anything touching our framebuffer */
960         fb_set_suspend(gfb->fb, 1);
961
962         /* seriously -- nobody is allowed to touch glamo memory when we
963          * are suspended or we lock on nWAIT
964          */
965         /* iounmap(gfb->fb->screen_base); */
966
967         return 0;
968 }
969
970 static int glamofb_resume(struct device *dev)
971 {
972         struct glamofb_handle *gfb = dev_get_drvdata(dev);
973
974         /* OK let's allow framebuffer ops again */
975         /* gfb->fb->screen_base = ioremap(gfb->fb_res->start,
976                                        resource_size(gfb->fb_res)); */
977         glamo_engine_enable(gfb->core, GLAMO_ENGINE_LCD);
978         glamo_engine_reset(gfb->core, GLAMO_ENGINE_LCD);
979
980         glamofb_init_regs(gfb);
981 #ifdef CONFIG_MFD_GLAMO_HWACCEL
982         glamofb_cursor_onoff(gfb, 1);
983 #endif
984
985         fb_set_suspend(gfb->fb, 0);
986
987         return 0;
988 }
989
990 static struct dev_pm_ops glamofb_pm_ops = {
991         .suspend = glamofb_suspend,
992         .resume = glamofb_resume,
993 };
994
995 #define GLAMOFB_PM_OPS (&glamofb_pm_ops)
996
997 #else
998 #define GLAMOFB_PM_OPS NULL
999 #endif
1000
1001 static struct platform_driver glamofb_driver = {
1002         .probe          = glamofb_probe,
1003         .remove         = glamofb_remove,
1004         .driver         = {
1005                 .name   = "glamo-fb",
1006                 .owner  = THIS_MODULE,
1007                 .pm     = GLAMOFB_PM_OPS
1008         },
1009 };
1010
1011 static int __devinit glamofb_init(void)
1012 {
1013         return platform_driver_register(&glamofb_driver);
1014 }
1015
1016 static void __exit glamofb_cleanup(void)
1017 {
1018         platform_driver_unregister(&glamofb_driver);
1019 }
1020
1021 module_init(glamofb_init);
1022 module_exit(glamofb_cleanup);
1023
1024 MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
1025 MODULE_DESCRIPTION("Smedia Glamo 336x/337x framebuffer driver");
1026 MODULE_LICENSE("GPL");