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[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");
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