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[s3c24xx] glamo-mmc: Limit clock rate.
[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 #ifndef DEBUG
47 #define GLAMO_LOG(...)
48 #else
49 #define GLAMO_LOG(...) \
50 do { \
51 printk(KERN_DEBUG "in %s:%s:%d", __FILE__, __func__, __LINE__); \
52 printk(KERN_DEBUG __VA_ARGS__); \
53 } while (0);
54 #endif
55
56 static void glamofb_program_mode(struct glamofb_handle* glamo);
57
58 struct glamofb_handle {
59 struct fb_info *fb;
60 struct device *dev;
61 struct resource *reg;
62 struct resource *fb_res;
63 char __iomem *base;
64 struct glamo_fb_platform_data *mach_info;
65 char __iomem *cursor_addr;
66 int cursor_on;
67 u_int32_t pseudo_pal[16];
68 spinlock_t lock_cmd;
69 int blank_mode;
70 int mode_set; /* 0 if the current display mode hasn't been set on the glamo */
71 int output_enabled; /* 0 if the video output is disabled */
72 };
73
74 static void glamo_output_enable(struct glamofb_handle *gfb) {
75 struct glamo_core *gcore = gfb->mach_info->core;
76
77 if (gfb->output_enabled)
78 return;
79
80 /* enable the pixel clock if off */
81 glamo_engine_clkreg_set(gcore,
82 GLAMO_ENGINE_LCD,
83 GLAMO_CLOCK_LCD_EN_DCLK,
84 GLAMO_CLOCK_LCD_EN_DCLK);
85
86 gfb->output_enabled = 1;
87 if (!gfb->mode_set)
88 glamofb_program_mode(gfb);
89 }
90
91 static void glamo_output_disable(struct glamofb_handle *gfb) {
92 struct glamo_core *gcore = gfb->mach_info->core;
93
94 if (!gfb->output_enabled)
95 return;
96
97 /* enable the pixel clock if off */
98 glamo_engine_clkreg_set(gcore,
99 GLAMO_ENGINE_LCD,
100 GLAMO_CLOCK_LCD_EN_DCLK,
101 0);
102
103 gfb->output_enabled = 0;
104 }
105
106
107 static int reg_read(struct glamofb_handle *glamo,
108 u_int16_t reg)
109 {
110 int i = 0;
111
112 for (i = 0; i != 2; i++)
113 nop();
114
115 return readw(glamo->base + reg);
116 }
117
118 static void reg_write(struct glamofb_handle *glamo,
119 u_int16_t reg, u_int16_t val)
120 {
121 int i = 0;
122
123 for (i = 0; i != 2; i++)
124 nop();
125
126 writew(val, glamo->base + reg);
127 }
128
129 static struct glamo_script glamo_regs[] = {
130 { GLAMO_REG_LCD_MODE1, 0x0020 },
131 /* no display rotation, no hardware cursor, no dither, no gamma,
132 * no retrace flip, vsync low-active, hsync low active,
133 * no TVCLK, no partial display, hw dest color from fb,
134 * no partial display mode, LCD1, software flip, */
135 { GLAMO_REG_LCD_MODE2, 0x9020 },
136 /* video flip, no ptr, no ptr, dhclk off,
137 * normal mode, no cpuif,
138 * res, serial msb first, single fb, no fr ctrl,
139 * cpu if bits all zero, no crc
140 * 0000 0000 0010 0000 */
141 { GLAMO_REG_LCD_MODE3, 0x0b40 },
142 /* src data rgb565, res, 18bit rgb666
143 * 000 01 011 0100 0000 */
144 { GLAMO_REG_LCD_POLARITY, 0x440c },
145 /* DE high active, no cpu/lcd if, cs0 force low, a0 low active,
146 * np cpu if, 9bit serial data, sclk rising edge latch data
147 * 01 00 0 100 0 000 01 0 0 */
148 /* The following values assume 640*480@16bpp */
149 { GLAMO_REG_LCD_A_BASE1, 0x0000 }, /* display A base address 15:0 */
150 { GLAMO_REG_LCD_A_BASE2, 0x0000 }, /* display A base address 22:16 */
151 { GLAMO_REG_LCD_CURSOR_BASE1, 0xC000 }, /* cursor base address 15:0 */
152 { GLAMO_REG_LCD_CURSOR_BASE2, 0x0012 }, /* cursor base address 22:16 */
153 { GLAMO_REG_LCD_COMMAND2, 0x0000 }, /* display page A */
154 };
155
156 static int glamofb_run_script(struct glamofb_handle *glamo,
157 struct glamo_script *script, int len)
158 {
159 int i;
160
161 if (glamo->mach_info->core->suspending) {
162 dev_err(&glamo->mach_info->core->pdev->dev,
163 "IGNORING glamofb_run_script while "
164 "suspended\n");
165 return -EBUSY;
166 }
167
168 for (i = 0; i < len; i++) {
169 struct glamo_script *line = &script[i];
170
171 if (line->reg == 0xffff)
172 return 0;
173 else if (line->reg == 0xfffe)
174 msleep(line->val);
175 else
176 reg_write(glamo, script[i].reg, script[i].val);
177 }
178
179 return 0;
180 }
181
182 static int glamofb_check_var(struct fb_var_screeninfo *var,
183 struct fb_info *info)
184 {
185 struct glamofb_handle *glamo = info->par;
186
187 if (glamo->mach_info->core->suspending) {
188 dev_err(&glamo->mach_info->core->pdev->dev,
189 "IGNORING glamofb_check_var while "
190 "suspended\n");
191 return -EBUSY;
192 }
193
194 if (var->bits_per_pixel != 16)
195 var->bits_per_pixel = 16;
196
197 var->height = glamo->mach_info->height;
198 var->width = glamo->mach_info->width;
199
200 /* FIXME: set rgb positions */
201 switch (var->bits_per_pixel) {
202 case 16:
203 switch (reg_read(glamo, GLAMO_REG_LCD_MODE3) & 0xc000) {
204 case GLAMO_LCD_SRC_RGB565:
205 var->red.offset = 11;
206 var->green.offset = 5;
207 var->blue.offset = 0;
208 var->red.length = 5;
209 var->green.length = 6;
210 var->blue.length = 5;
211 var->transp.length = 0;
212 break;
213 case GLAMO_LCD_SRC_ARGB1555:
214 var->transp.offset = 15;
215 var->red.offset = 10;
216 var->green.offset = 5;
217 var->blue.offset = 0;
218 var->transp.length = 1;
219 var->red.length = 5;
220 var->green.length = 5;
221 var->blue.length = 5;
222 break;
223 case GLAMO_LCD_SRC_ARGB4444:
224 var->transp.offset = 12;
225 var->red.offset = 8;
226 var->green.offset = 4;
227 var->blue.offset = 0;
228 var->transp.length = 4;
229 var->red.length = 4;
230 var->green.length = 4;
231 var->blue.length = 4;
232 break;
233 }
234 break;
235 case 24:
236 case 32:
237 default:
238 /* The Smedia Glamo doesn't support anything but 16bit color */
239 printk(KERN_ERR
240 "Smedia driver does not [yet?] support 24/32bpp\n");
241 return -EINVAL;
242 }
243
244 return 0;
245 }
246
247 static void reg_set_bit_mask(struct glamofb_handle *glamo,
248 u_int16_t reg, u_int16_t mask,
249 u_int16_t val)
250 {
251 u_int16_t tmp;
252
253 val &= mask;
254
255 tmp = reg_read(glamo, reg);
256 tmp &= ~mask;
257 tmp |= val;
258 reg_write(glamo, reg, tmp);
259 }
260
261 #define GLAMO_LCD_WIDTH_MASK 0x03FF
262 #define GLAMO_LCD_HEIGHT_MASK 0x03FF
263 #define GLAMO_LCD_PITCH_MASK 0x07FE
264 #define GLAMO_LCD_HV_TOTAL_MASK 0x03FF
265 #define GLAMO_LCD_HV_RETR_START_MASK 0x03FF
266 #define GLAMO_LCD_HV_RETR_END_MASK 0x03FF
267 #define GLAMO_LCD_HV_RETR_DISP_START_MASK 0x03FF
268 #define GLAMO_LCD_HV_RETR_DISP_END_MASK 0x03FF
269
270 /* the caller has to enxure lock_cmd is held and we are in cmd mode */
271 static void __rotate_lcd(struct glamofb_handle *glamo, __u32 rotation)
272 {
273 int glamo_rot;
274
275 if (glamo->mach_info->core->suspending) {
276 dev_err(&glamo->mach_info->core->pdev->dev,
277 "IGNORING rotate_lcd while "
278 "suspended\n");
279 return;
280 }
281
282 switch (rotation) {
283 case FB_ROTATE_CW:
284 glamo_rot = GLAMO_LCD_ROT_MODE_90;
285 break;
286 case FB_ROTATE_UD:
287 glamo_rot = GLAMO_LCD_ROT_MODE_180;
288 break;
289 case FB_ROTATE_CCW:
290 glamo_rot = GLAMO_LCD_ROT_MODE_270;
291 break;
292 default:
293 glamo_rot = GLAMO_LCD_ROT_MODE_0;
294 break;
295 }
296
297 reg_set_bit_mask(glamo,
298 GLAMO_REG_LCD_WIDTH,
299 GLAMO_LCD_ROT_MODE_MASK,
300 glamo_rot);
301 reg_set_bit_mask(glamo,
302 GLAMO_REG_LCD_MODE1,
303 GLAMO_LCD_MODE1_ROTATE_EN,
304 (glamo_rot != GLAMO_LCD_ROT_MODE_0) ?
305 GLAMO_LCD_MODE1_ROTATE_EN : 0);
306 }
307
308 static void glamofb_program_mode(struct glamofb_handle* gfb) {
309 int sync, bp, disp, fp, total;
310 unsigned long flags;
311 struct glamo_core *gcore = gfb->mach_info->core;
312 struct fb_var_screeninfo *var = &gfb->fb->var;
313
314 dev_dbg(&gcore->pdev->dev,
315 "glamofb_program_mode spin_lock_irqsave\n");
316 spin_lock_irqsave(&gfb->lock_cmd, flags);
317
318 if (glamofb_cmd_mode(gfb, 1))
319 goto out_unlock;
320
321 if (var->pixclock)
322 glamo_engine_reclock(gcore,
323 GLAMO_ENGINE_LCD,
324 (1000000000UL / gfb->fb->var.pixclock) * 1000);
325
326 reg_set_bit_mask(gfb,
327 GLAMO_REG_LCD_WIDTH,
328 GLAMO_LCD_WIDTH_MASK,
329 var->xres);
330 reg_set_bit_mask(gfb,
331 GLAMO_REG_LCD_HEIGHT,
332 GLAMO_LCD_HEIGHT_MASK,
333 var->yres);
334 reg_set_bit_mask(gfb,
335 GLAMO_REG_LCD_PITCH,
336 GLAMO_LCD_PITCH_MASK,
337 gfb->fb->fix.line_length);
338
339 /* honour the rotation request */
340 __rotate_lcd(gfb, var->rotate);
341
342 /* update scannout timings */
343 sync = 0;
344 bp = sync + var->hsync_len;
345 disp = bp + var->left_margin;
346 fp = disp + var->xres;
347 total = fp + var->right_margin;
348
349 reg_set_bit_mask(gfb, GLAMO_REG_LCD_HORIZ_TOTAL,
350 GLAMO_LCD_HV_TOTAL_MASK, total);
351 reg_set_bit_mask(gfb, GLAMO_REG_LCD_HORIZ_RETR_START,
352 GLAMO_LCD_HV_RETR_START_MASK, sync);
353 reg_set_bit_mask(gfb, GLAMO_REG_LCD_HORIZ_RETR_END,
354 GLAMO_LCD_HV_RETR_END_MASK, bp);
355 reg_set_bit_mask(gfb, GLAMO_REG_LCD_HORIZ_DISP_START,
356 GLAMO_LCD_HV_RETR_DISP_START_MASK, disp);
357 reg_set_bit_mask(gfb, GLAMO_REG_LCD_HORIZ_DISP_END,
358 GLAMO_LCD_HV_RETR_DISP_END_MASK, fp);
359
360 sync = 0;
361 bp = sync + var->vsync_len;
362 disp = bp + var->upper_margin;
363 fp = disp + var->yres;
364 total = fp + var->lower_margin;
365
366 reg_set_bit_mask(gfb, GLAMO_REG_LCD_VERT_TOTAL,
367 GLAMO_LCD_HV_TOTAL_MASK, total);
368 reg_set_bit_mask(gfb, GLAMO_REG_LCD_VERT_RETR_START,
369 GLAMO_LCD_HV_RETR_START_MASK, sync);
370 reg_set_bit_mask(gfb, GLAMO_REG_LCD_VERT_RETR_END,
371 GLAMO_LCD_HV_RETR_END_MASK, bp);
372 reg_set_bit_mask(gfb, GLAMO_REG_LCD_VERT_DISP_START,
373 GLAMO_LCD_HV_RETR_DISP_START_MASK, disp);
374 reg_set_bit_mask(gfb, GLAMO_REG_LCD_VERT_DISP_END,
375 GLAMO_LCD_HV_RETR_DISP_END_MASK, fp);
376
377 glamofb_cmd_mode(gfb, 0);
378
379 gfb->mode_set = 1;
380
381 out_unlock:
382 dev_dbg(&gcore->pdev->dev,
383 "glamofb_program_mode spin_unlock_irqrestore\n");
384 spin_unlock_irqrestore(&gfb->lock_cmd, flags);
385 }
386
387
388 static int glamofb_pan_display(struct fb_var_screeninfo *var,
389 struct fb_info *info)
390 {
391 return 0;
392 }
393
394 static struct fb_videomode *glamofb_find_mode(struct fb_info *info,
395 struct fb_var_screeninfo *var) {
396 struct glamofb_handle *glamo = info->par;
397 struct glamo_fb_platform_data *mach_info = glamo->mach_info;
398 struct fb_videomode *mode;
399 int i;
400
401 for(i = mach_info->num_modes, mode = mach_info->modes; i > 0; --i, ++mode) {
402 if (mode->xres == var->xres &&
403 mode->yres == var->yres)
404 return mode;
405 }
406
407 return NULL;
408 }
409
410 static int glamofb_set_par(struct fb_info *info)
411 {
412 struct glamofb_handle *glamo = info->par;
413 struct fb_var_screeninfo *var = &info->var;
414 struct fb_videomode *mode;
415
416 if (glamo->mach_info->core->suspending) {
417 dev_err(&glamo->mach_info->core->pdev->dev,
418 "IGNORING glamofb_set_par while "
419 "suspended\n");
420 return -EBUSY;
421 }
422
423 mode = glamofb_find_mode(info, var);
424 if (!mode)
425 return -EINVAL;
426
427 fb_videomode_to_var(var, mode);
428
429 info->mode = mode;
430
431 glamo->mode_set = 0;
432
433 switch(var->rotate) {
434 case FB_ROTATE_CW:
435 case FB_ROTATE_CCW:
436 info->fix.line_length = (var->yres * var->bits_per_pixel) / 8;
437 /* FIXME: Limit pixelclock */
438 var->pixclock *= 2;
439 break;
440 default:
441 info->fix.line_length = (var->xres * var->bits_per_pixel) / 8;
442 break;
443 }
444
445 if(glamo->output_enabled)
446 glamofb_program_mode(glamo);
447
448 return 0;
449 }
450
451 static int glamofb_blank(int blank_mode, struct fb_info *info)
452 {
453 struct glamofb_handle *gfb = info->par;
454
455 dev_dbg(gfb->dev, "glamofb_blank(%u)\n", blank_mode);
456
457 switch (blank_mode) {
458 case FB_BLANK_VSYNC_SUSPEND:
459 case FB_BLANK_HSYNC_SUSPEND:
460 /* FIXME: add pdata hook/flag to indicate whether
461 * we should already switch off pixel clock here */
462 break;
463 case FB_BLANK_POWERDOWN:
464 /* disable the pixel clock */
465 glamo_output_disable(gfb);
466 gfb->blank_mode = blank_mode;
467 break;
468 case FB_BLANK_UNBLANK:
469 case FB_BLANK_NORMAL:
470 glamo_output_enable(gfb);
471 gfb->blank_mode = blank_mode;
472 break;
473 }
474
475 /* FIXME: once we have proper clock management in glamo-core,
476 * we can determine if other units need MCLK1 or the PLL, and
477 * disable it if not used. */
478 return 0;
479 }
480
481 static inline unsigned int chan_to_field(unsigned int chan,
482 struct fb_bitfield *bf)
483 {
484 chan &= 0xffff;
485 chan >>= 16 - bf->length;
486 return chan << bf->offset;
487 }
488
489 static int glamofb_setcolreg(unsigned regno,
490 unsigned red, unsigned green, unsigned blue,
491 unsigned transp, struct fb_info *info)
492 {
493 struct glamofb_handle *glamo = info->par;
494 unsigned int val;
495
496 if (glamo->mach_info->core->suspending) {
497 dev_err(&glamo->mach_info->core->pdev->dev,
498 "IGNORING glamofb_set_par while "
499 "suspended\n");
500 return -EBUSY;
501 }
502
503 switch (glamo->fb->fix.visual) {
504 case FB_VISUAL_TRUECOLOR:
505 case FB_VISUAL_DIRECTCOLOR:
506 /* true-colour, use pseuo-palette */
507
508 if (regno < 16) {
509 u32 *pal = glamo->fb->pseudo_palette;
510
511 val = chan_to_field(red, &glamo->fb->var.red);
512 val |= chan_to_field(green, &glamo->fb->var.green);
513 val |= chan_to_field(blue, &glamo->fb->var.blue);
514
515 pal[regno] = val;
516 };
517 break;
518 default:
519 return 1; /* unknown type */
520 }
521
522 return 0;
523 }
524
525 static int glamofb_ioctl(struct fb_info *info, unsigned int cmd,
526 unsigned long arg) {
527 struct glamofb_handle *gfb = (struct glamofb_handle*)info->par;
528 struct glamo_core *gcore = gfb->mach_info->core;
529 int retval = -ENOTTY;
530
531 switch (cmd) {
532 case GLAMOFB_ENGINE_ENABLE:
533 retval = glamo_engine_enable(gcore, arg);
534 break;
535 case GLAMOFB_ENGINE_DISABLE:
536 retval = glamo_engine_disable(gcore, arg);
537 break;
538 case GLAMOFB_ENGINE_RESET:
539 glamo_engine_reset(gcore, arg);
540 retval = 0;
541 break;
542 default:
543 break;
544 }
545
546 return retval;
547 }
548
549
550 #ifdef CONFIG_MFD_GLAMO_HWACCEL
551 static inline void glamofb_vsync_wait(struct glamofb_handle *glamo,
552 int line, int size, int range)
553 {
554 int count[2];
555
556 do {
557 count[0] = reg_read(glamo, GLAMO_REG_LCD_STATUS2) & 0x3ff;
558 count[1] = reg_read(glamo, GLAMO_REG_LCD_STATUS2) & 0x3ff;
559 } while (count[0] != count[1] ||
560 (line < count[0] + range &&
561 size > count[0] - range) ||
562 count[0] < range * 2);
563 }
564
565 /*
566 * Enable/disable the hardware cursor mode altogether
567 * (for blinking and such, use glamofb_cursor()).
568 */
569 static void glamofb_cursor_onoff(struct glamofb_handle *glamo, int on)
570 {
571 int y, size;
572
573 if (glamo->cursor_on) {
574 y = reg_read(glamo, GLAMO_REG_LCD_CURSOR_Y_POS);
575 size = reg_read(glamo, GLAMO_REG_LCD_CURSOR_Y_SIZE);
576
577 glamofb_vsync_wait(glamo, y, size, 30);
578 }
579
580 reg_set_bit_mask(glamo, GLAMO_REG_LCD_MODE1,
581 GLAMO_LCD_MODE1_CURSOR_EN,
582 on ? GLAMO_LCD_MODE1_CURSOR_EN : 0);
583 glamo->cursor_on = on;
584
585 /* Hide the cursor by default */
586 reg_write(glamo, GLAMO_REG_LCD_CURSOR_X_SIZE, 0);
587 }
588
589 static int glamofb_cursor(struct fb_info *info, struct fb_cursor *cursor)
590 {
591 struct glamofb_handle *glamo = info->par;
592 unsigned long flags;
593
594 spin_lock_irqsave(&glamo->lock_cmd, flags);
595
596 reg_write(glamo, GLAMO_REG_LCD_CURSOR_X_SIZE,
597 cursor->enable ? cursor->image.width : 0);
598
599 if (cursor->set & FB_CUR_SETPOS) {
600 reg_write(glamo, GLAMO_REG_LCD_CURSOR_X_POS,
601 cursor->image.dx);
602 reg_write(glamo, GLAMO_REG_LCD_CURSOR_Y_POS,
603 cursor->image.dy);
604 }
605
606 if (cursor->set & FB_CUR_SETCMAP) {
607 uint16_t fg = glamo->pseudo_pal[cursor->image.fg_color];
608 uint16_t bg = glamo->pseudo_pal[cursor->image.bg_color];
609
610 reg_write(glamo, GLAMO_REG_LCD_CURSOR_FG_COLOR, fg);
611 reg_write(glamo, GLAMO_REG_LCD_CURSOR_BG_COLOR, bg);
612 reg_write(glamo, GLAMO_REG_LCD_CURSOR_DST_COLOR, fg);
613 }
614
615 if (cursor->set & FB_CUR_SETHOT)
616 reg_write(glamo, GLAMO_REG_LCD_CURSOR_PRESET,
617 (cursor->hot.x << 8) | cursor->hot.y);
618
619 if ((cursor->set & FB_CUR_SETSIZE) ||
620 (cursor->set & (FB_CUR_SETIMAGE | FB_CUR_SETSHAPE))) {
621 int x, y, pitch, op;
622 const uint8_t *pcol = cursor->image.data;
623 const uint8_t *pmsk = cursor->mask;
624 uint8_t __iomem *dst = glamo->cursor_addr;
625 uint8_t dcol = 0;
626 uint8_t dmsk = 0;
627 uint8_t byte = 0;
628
629 if (cursor->image.depth > 1) {
630 spin_unlock_irqrestore(&glamo->lock_cmd, flags);
631 return -EINVAL;
632 }
633
634 pitch = ((cursor->image.width + 7) >> 2) & ~1;
635 reg_write(glamo, GLAMO_REG_LCD_CURSOR_PITCH,
636 pitch);
637 reg_write(glamo, GLAMO_REG_LCD_CURSOR_Y_SIZE,
638 cursor->image.height);
639
640 for (y = 0; y < cursor->image.height; y++) {
641 byte = 0;
642 for (x = 0; x < cursor->image.width; x++) {
643 if ((x % 8) == 0) {
644 dcol = *pcol++;
645 dmsk = *pmsk++;
646 } else {
647 dcol >>= 1;
648 dmsk >>= 1;
649 }
650
651 if (cursor->rop == ROP_COPY)
652 op = (dmsk & 1) ?
653 (dcol & 1) ? 1 : 3 : 0;
654 else
655 op = ((dmsk & 1) << 1) |
656 ((dcol & 1) << 0);
657 byte |= op << ((x & 3) << 1);
658
659 if (x % 4 == 3) {
660 writeb(byte, dst + x / 4);
661 byte = 0;
662 }
663 }
664 if (x % 4) {
665 writeb(byte, dst + x / 4);
666 byte = 0;
667 }
668
669 dst += pitch;
670 }
671 }
672
673 spin_unlock_irqrestore(&glamo->lock_cmd, flags);
674
675 return 0;
676 }
677 #endif
678
679 static inline int glamofb_cmdq_empty(struct glamofb_handle *gfb)
680 {
681 /* DGCMdQempty -- 1 == command queue is empty */
682 return reg_read(gfb, GLAMO_REG_LCD_STATUS1) & (1 << 15);
683 }
684
685 /* call holding gfb->lock_cmd when locking, until you unlock */
686 int glamofb_cmd_mode(struct glamofb_handle *gfb, int on)
687 {
688 int timeout = 2000000;
689
690 if (gfb->mach_info->core->suspending) {
691 dev_err(&gfb->mach_info->core->pdev->dev,
692 "IGNORING glamofb_cmd_mode while "
693 "suspended\n");
694 return -EBUSY;
695 }
696
697 dev_dbg(gfb->dev, "glamofb_cmd_mode(gfb=%p, on=%d)\n", gfb, on);
698 if (on) {
699 dev_dbg(gfb->dev, "%s: waiting for cmdq empty: ",
700 __func__);
701 while ((!glamofb_cmdq_empty(gfb)) && (timeout--))
702 yield();
703 if (timeout < 0) {
704 printk(KERN_ERR"*************"
705 "glamofb cmd_queue never got empty"
706 "*************\n");
707 return -EIO;
708 }
709 dev_dbg(gfb->dev, "empty!\n");
710
711 /* display the entire frame then switch to command */
712 reg_write(gfb, GLAMO_REG_LCD_COMMAND1,
713 GLAMO_LCD_CMD_TYPE_DISP |
714 GLAMO_LCD_CMD_DATA_FIRE_VSYNC);
715
716 /* wait until lcd idle */
717 dev_dbg(gfb->dev, "waiting for lcd idle: ");
718 timeout = 2000000;
719 while ((!reg_read(gfb, GLAMO_REG_LCD_STATUS2) & (1 << 12)) &&
720 (timeout--))
721 /* yield() */;
722 if (timeout < 0) {
723 printk(KERN_ERR"*************"
724 "glamofb lcd never idle"
725 "*************\n");
726 return -EIO;
727 }
728
729 mdelay(100);
730
731 dev_dbg(gfb->dev, "cmd mode entered\n");
732
733 } else {
734 /* RGB interface needs vsync/hsync */
735 if (reg_read(gfb, GLAMO_REG_LCD_MODE3) & GLAMO_LCD_MODE3_RGB)
736 reg_write(gfb, GLAMO_REG_LCD_COMMAND1,
737 GLAMO_LCD_CMD_TYPE_DISP |
738 GLAMO_LCD_CMD_DATA_DISP_SYNC);
739
740 reg_write(gfb, GLAMO_REG_LCD_COMMAND1,
741 GLAMO_LCD_CMD_TYPE_DISP |
742 GLAMO_LCD_CMD_DATA_DISP_FIRE);
743 }
744
745 return 0;
746 }
747 EXPORT_SYMBOL_GPL(glamofb_cmd_mode);
748
749
750 int glamofb_cmd_write(struct glamofb_handle *gfb, u_int16_t val)
751 {
752 int timeout = 200000;
753
754 if (gfb->mach_info->core->suspending) {
755 dev_err(&gfb->mach_info->core->pdev->dev,
756 "IGNORING glamofb_cmd_write while "
757 "suspended\n");
758 return -EBUSY;
759 }
760
761 dev_dbg(gfb->dev, "%s: waiting for cmdq empty\n", __func__);
762 while ((!glamofb_cmdq_empty(gfb)) && (timeout--))
763 yield();
764 if (timeout < 0) {
765 printk(KERN_ERR"*************"
766 "glamofb cmd_queue never got empty"
767 "*************\n");
768 return 1;
769 }
770 dev_dbg(gfb->dev, "idle, writing 0x%04x\n", val);
771
772 reg_write(gfb, GLAMO_REG_LCD_COMMAND1, val);
773
774 return 0;
775 }
776 EXPORT_SYMBOL_GPL(glamofb_cmd_write);
777
778 static struct fb_ops glamofb_ops = {
779 .owner = THIS_MODULE,
780 .fb_check_var = glamofb_check_var,
781 .fb_pan_display = glamofb_pan_display,
782 .fb_set_par = glamofb_set_par,
783 .fb_blank = glamofb_blank,
784 .fb_setcolreg = glamofb_setcolreg,
785 .fb_ioctl = glamofb_ioctl,
786 #ifdef CONFIG_MFD_GLAMO_HWACCEL
787 .fb_cursor = glamofb_cursor,
788 #endif
789 .fb_fillrect = cfb_fillrect,
790 .fb_copyarea = cfb_copyarea,
791 .fb_imageblit = cfb_imageblit,
792 };
793
794 static int glamofb_init_regs(struct glamofb_handle *glamo)
795 {
796 struct fb_info *info = glamo->fb;
797
798 glamofb_check_var(&info->var, info);
799 glamofb_run_script(glamo, glamo_regs, ARRAY_SIZE(glamo_regs));
800 glamofb_set_par(info);
801
802 return 0;
803 }
804
805 static int __init glamofb_probe(struct platform_device *pdev)
806 {
807 int rc = -EIO;
808 struct fb_info *fbinfo;
809 struct glamofb_handle *glamofb;
810 struct glamo_fb_platform_data *mach_info = pdev->dev.platform_data;
811
812 printk(KERN_INFO "SMEDIA Glamo frame buffer driver (C) 2007 "
813 "Openmoko, Inc.\n");
814
815 fbinfo = framebuffer_alloc(sizeof(struct glamofb_handle), &pdev->dev);
816 if (!fbinfo)
817 return -ENOMEM;
818
819 glamofb = fbinfo->par;
820 glamofb->fb = fbinfo;
821 glamofb->dev = &pdev->dev;
822
823 glamofb->blank_mode = FB_BLANK_POWERDOWN;
824
825 strcpy(fbinfo->fix.id, "SMedia Glamo");
826
827 glamofb->reg = platform_get_resource_byname(pdev, IORESOURCE_MEM,
828 "glamo-fb-regs");
829 if (!glamofb->reg) {
830 dev_err(&pdev->dev, "platform device with no registers?\n");
831 rc = -ENOENT;
832 goto out_free;
833 }
834
835 glamofb->fb_res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
836 "glamo-fb-mem");
837 if (!glamofb->fb_res) {
838 dev_err(&pdev->dev, "platform device with no memory ?\n");
839 rc = -ENOENT;
840 goto out_free;
841 }
842
843 glamofb->reg = request_mem_region(glamofb->reg->start,
844 resource_size(glamofb->reg), pdev->name);
845 if (!glamofb->reg) {
846 dev_err(&pdev->dev, "failed to request mmio region\n");
847 goto out_free;
848 }
849
850 glamofb->fb_res = request_mem_region(glamofb->fb_res->start,
851 resource_size(glamofb->fb_res),
852 pdev->name);
853 if (!glamofb->fb_res) {
854 dev_err(&pdev->dev, "failed to request vram region\n");
855 goto out_release_reg;
856 }
857
858 /* we want to remap only the registers required for this core
859 * driver. */
860 glamofb->base = ioremap_nocache(glamofb->reg->start, resource_size(glamofb->reg));
861 if (!glamofb->base) {
862 dev_err(&pdev->dev, "failed to ioremap() mmio memory\n");
863 goto out_release_fb;
864 }
865
866 fbinfo->fix.smem_start = (unsigned long) glamofb->fb_res->start;
867 fbinfo->fix.smem_len = (__u32) resource_size(glamofb->fb_res);
868
869 fbinfo->screen_base = ioremap(glamofb->fb_res->start,
870 resource_size(glamofb->fb_res));
871 if (!fbinfo->screen_base) {
872 dev_err(&pdev->dev, "failed to ioremap() vram memory\n");
873 goto out_release_fb;
874 }
875 glamofb->cursor_addr = fbinfo->screen_base + 0x12C000;
876
877 platform_set_drvdata(pdev, glamofb);
878
879 glamofb->mach_info = pdev->dev.platform_data;
880
881 fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
882 fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
883 fbinfo->fix.type_aux = 0;
884 fbinfo->fix.xpanstep = 0;
885 fbinfo->fix.ypanstep = 0;
886 fbinfo->fix.ywrapstep = 0;
887 fbinfo->fix.accel = FB_ACCEL_GLAMO;
888
889
890 fbinfo->fbops = &glamofb_ops;
891 fbinfo->flags = FBINFO_FLAG_DEFAULT;
892 fbinfo->pseudo_palette = &glamofb->pseudo_pal;
893
894 fbinfo->mode = mach_info->modes;
895 fb_videomode_to_var(&fbinfo->var, fbinfo->mode);
896 fbinfo->var.bits_per_pixel = 16;
897 fbinfo->var.nonstd = 0;
898 fbinfo->var.activate = FB_ACTIVATE_NOW;
899 fbinfo->var.height = mach_info->height;
900 fbinfo->var.width = mach_info->width;
901 fbinfo->var.accel_flags = 0;
902 fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
903
904 glamo_engine_enable(mach_info->core, GLAMO_ENGINE_LCD);
905 glamo_engine_reset(mach_info->core, GLAMO_ENGINE_LCD);
906 glamofb->output_enabled = 1;
907 glamofb->mode_set = 1;
908
909 dev_info(&pdev->dev, "spin_lock_init\n");
910 spin_lock_init(&glamofb->lock_cmd);
911 glamofb_init_regs(glamofb);
912 #ifdef CONFIG_MFD_GLAMO_HWACCEL
913 glamofb_cursor_onoff(glamofb, 1);
914 #endif
915
916 fb_videomode_to_modelist(mach_info->modes, mach_info->num_modes,
917 &fbinfo->modelist);
918
919 rc = register_framebuffer(fbinfo);
920 if (rc < 0) {
921 dev_err(&pdev->dev, "failed to register framebuffer\n");
922 goto out_unmap_fb;
923 }
924
925 printk(KERN_INFO "fb%d: %s frame buffer device\n",
926 fbinfo->node, fbinfo->fix.id);
927
928 return 0;
929
930 out_unmap_fb:
931 iounmap(fbinfo->screen_base);
932 iounmap(glamofb->base);
933 out_release_fb:
934 release_mem_region(glamofb->fb_res->start, resource_size(glamofb->fb_res));
935 out_release_reg:
936 release_mem_region(glamofb->reg->start, resource_size(glamofb->reg));
937 out_free:
938 framebuffer_release(fbinfo);
939 return rc;
940 }
941
942 static int glamofb_remove(struct platform_device *pdev)
943 {
944 struct glamofb_handle *glamofb = platform_get_drvdata(pdev);
945
946 platform_set_drvdata(pdev, NULL);
947 iounmap(glamofb->base);
948 release_mem_region(glamofb->reg->start, resource_size(glamofb->reg));
949 kfree(glamofb);
950
951 return 0;
952 }
953
954 #ifdef CONFIG_PM
955
956 static int glamofb_suspend(struct device *dev)
957 {
958 struct glamofb_handle *gfb = dev_get_drvdata(dev);
959
960 /* we need to stop anything touching our framebuffer */
961 fb_set_suspend(gfb->fb, 1);
962
963 /* seriously -- nobody is allowed to touch glamo memory when we
964 * are suspended or we lock on nWAIT
965 */
966 /* iounmap(gfb->fb->screen_base); */
967
968 return 0;
969 }
970
971 static int glamofb_resume(struct device *dev)
972 {
973 struct glamofb_handle *gfb = dev_get_drvdata(dev);
974 struct glamo_fb_platform_data *mach_info = dev->platform_data;
975
976 /* OK let's allow framebuffer ops again */
977 /* gfb->fb->screen_base = ioremap(gfb->fb_res->start,
978 resource_size(gfb->fb_res)); */
979 glamo_engine_enable(mach_info->core, GLAMO_ENGINE_LCD);
980 glamo_engine_reset(mach_info->core, GLAMO_ENGINE_LCD);
981
982 glamofb_init_regs(gfb);
983 #ifdef CONFIG_MFD_GLAMO_HWACCEL
984 glamofb_cursor_onoff(gfb, 1);
985 #endif
986
987 fb_set_suspend(gfb->fb, 0);
988
989 return 0;
990 }
991
992 static struct dev_pm_ops glamofb_pm_ops = {
993 .suspend = glamofb_suspend,
994 .resume = glamofb_resume,
995 };
996
997 #define GLAMOFB_PM_OPS (&glamofb_pm_ops)
998
999 #else
1000 #define GLAMOFB_PM_OPS NULL
1001 #endif
1002
1003 static struct platform_driver glamofb_driver = {
1004 .probe = glamofb_probe,
1005 .remove = glamofb_remove,
1006 .driver = {
1007 .name = "glamo-fb",
1008 .owner = THIS_MODULE,
1009 .pm = GLAMOFB_PM_OPS
1010 },
1011 };
1012
1013 static int __devinit glamofb_init(void)
1014 {
1015 return platform_driver_register(&glamofb_driver);
1016 }
1017
1018 static void __exit glamofb_cleanup(void)
1019 {
1020 platform_driver_unregister(&glamofb_driver);
1021 }
1022
1023 module_init(glamofb_init);
1024 module_exit(glamofb_cleanup);
1025
1026 MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
1027 MODULE_DESCRIPTION("Smedia Glamo 336x/337x framebuffer driver");
1028 MODULE_LICENSE("GPL");
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