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[s3c24xx] glamo: Use mfd_cell for child resource handling instead of some ugly custom...
[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/errno.h>
26 #include <linux/string.h>
27 #include <linux/mm.h>
28 #include <linux/slab.h>
29 #include <linux/delay.h>
30 #include <linux/fb.h>
31 #include <linux/init.h>
32 #include <linux/vmalloc.h>
33 #include <linux/dma-mapping.h>
34 #include <linux/interrupt.h>
35 #include <linux/workqueue.h>
36 #include <linux/wait.h>
37 #include <linux/platform_device.h>
38 #include <linux/clk.h>
39 #include <linux/spinlock.h>
40 #include <linux/io.h>
41 #include <linux/uaccess.h>
42
43 #include <asm/div64.h>
44
45 #ifdef CONFIG_PM
46 #include <linux/pm.h>
47 #endif
48
49 #include <linux/glamofb.h>
50
51 #include "glamo-regs.h"
52 #include "glamo-core.h"
53
54 #ifndef DEBUG
55 #define GLAMO_LOG(...)
56 #else
57 #define GLAMO_LOG(...) \
58 do { \
59 printk(KERN_DEBUG "in %s:%s:%d", __FILE__, __func__, __LINE__); \
60 printk(KERN_DEBUG __VA_ARGS__); \
61 } while (0);
62 #endif
63
64 static void glamofb_program_mode(struct glamofb_handle* glamo);
65
66 struct glamofb_handle {
67 struct fb_info *fb;
68 struct device *dev;
69 struct resource *reg;
70 struct resource *fb_res;
71 char __iomem *base;
72 struct glamofb_platform_data *mach_info;
73 char __iomem *cursor_addr;
74 int cursor_on;
75 u_int32_t pseudo_pal[16];
76 spinlock_t lock_cmd;
77 int blank_mode;
78 int mode_set; /* 0 if the current display mode hasn't been set on the glamo */
79 int output_enabled; /* 0 if the video output is disabled */
80 };
81
82 static void glamo_output_enable(struct glamofb_handle *gfb) {
83 struct glamo_core *gcore = gfb->mach_info->glamo;
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 GLAMO_CLOCK_LCD_EN_DCLK);
93
94 gfb->output_enabled = 1;
95 if (!gfb->mode_set)
96 glamofb_program_mode(gfb);
97 }
98
99 static void glamo_output_disable(struct glamofb_handle *gfb) {
100 struct glamo_core *gcore = gfb->mach_info->glamo;
101
102 if (!gfb->output_enabled)
103 return;
104
105 /* enable the pixel clock if off */
106 glamo_engine_clkreg_set(gcore,
107 GLAMO_ENGINE_LCD,
108 GLAMO_CLOCK_LCD_EN_DCLK,
109 0);
110
111 gfb->output_enabled = 0;
112 }
113
114
115 static int reg_read(struct glamofb_handle *glamo,
116 u_int16_t reg)
117 {
118 int i = 0;
119
120 for (i = 0; i != 2; i++)
121 nop();
122
123 return readw(glamo->base + reg);
124 }
125
126 static void reg_write(struct glamofb_handle *glamo,
127 u_int16_t reg, u_int16_t val)
128 {
129 int i = 0;
130
131 for (i = 0; i != 2; i++)
132 nop();
133
134 writew(val, glamo->base + reg);
135 }
136
137 static struct glamo_script glamo_regs[] = {
138 { GLAMO_REG_LCD_MODE1, 0x0020 },
139 /* no display rotation, no hardware cursor, no dither, no gamma,
140 * no retrace flip, vsync low-active, hsync low active,
141 * no TVCLK, no partial display, hw dest color from fb,
142 * no partial display mode, LCD1, software flip, */
143 { GLAMO_REG_LCD_MODE2, 0x9020 },
144 /* video flip, no ptr, no ptr, dhclk off,
145 * normal mode, no cpuif,
146 * res, serial msb first, single fb, no fr ctrl,
147 * cpu if bits all zero, no crc
148 * 0000 0000 0010 0000 */
149 { GLAMO_REG_LCD_MODE3, 0x0b40 },
150 /* src data rgb565, res, 18bit rgb666
151 * 000 01 011 0100 0000 */
152 { GLAMO_REG_LCD_POLARITY, 0x440c },
153 /* DE high active, no cpu/lcd if, cs0 force low, a0 low active,
154 * np cpu if, 9bit serial data, sclk rising edge latch data
155 * 01 00 0 100 0 000 01 0 0 */
156 /* The following values assume 640*480@16bpp */
157 { GLAMO_REG_LCD_A_BASE1, 0x0000 }, /* display A base address 15:0 */
158 { GLAMO_REG_LCD_A_BASE2, 0x0000 }, /* display A base address 22:16 */
159 { GLAMO_REG_LCD_CURSOR_BASE1, 0xC000 }, /* cursor base address 15:0 */
160 { GLAMO_REG_LCD_CURSOR_BASE2, 0x0012 }, /* cursor base address 22:16 */
161 { GLAMO_REG_LCD_COMMAND2, 0x0000 }, /* display page A */
162 };
163
164 static int glamofb_run_script(struct glamofb_handle *glamo,
165 struct glamo_script *script, int len)
166 {
167 int i;
168
169 if (glamo->mach_info->glamo->suspending) {
170 dev_err(&glamo->mach_info->glamo->pdev->dev,
171 "IGNORING glamofb_run_script while "
172 "suspended\n");
173 return -EBUSY;
174 }
175
176 for (i = 0; i < len; i++) {
177 struct glamo_script *line = &script[i];
178
179 if (line->reg == 0xffff)
180 return 0;
181 else if (line->reg == 0xfffe)
182 msleep(line->val);
183 else
184 reg_write(glamo, script[i].reg, script[i].val);
185 }
186
187 return 0;
188 }
189
190 static int glamofb_check_var(struct fb_var_screeninfo *var,
191 struct fb_info *info)
192 {
193 struct glamofb_handle *glamo = info->par;
194
195 if (glamo->mach_info->glamo->suspending) {
196 dev_err(&glamo->mach_info->glamo->pdev->dev,
197 "IGNORING glamofb_check_var while "
198 "suspended\n");
199 return -EBUSY;
200 }
201
202 if (var->bits_per_pixel != 16)
203 var->bits_per_pixel = 16;
204
205 var->height = glamo->mach_info->height;
206 var->width = glamo->mach_info->width;
207
208 /* FIXME: set rgb positions */
209 switch (var->bits_per_pixel) {
210 case 16:
211 switch (reg_read(glamo, GLAMO_REG_LCD_MODE3) & 0xc000) {
212 case GLAMO_LCD_SRC_RGB565:
213 var->red.offset = 11;
214 var->green.offset = 5;
215 var->blue.offset = 0;
216 var->red.length = 5;
217 var->green.length = 6;
218 var->blue.length = 5;
219 var->transp.length = 0;
220 break;
221 case GLAMO_LCD_SRC_ARGB1555:
222 var->transp.offset = 15;
223 var->red.offset = 10;
224 var->green.offset = 5;
225 var->blue.offset = 0;
226 var->transp.length = 1;
227 var->red.length = 5;
228 var->green.length = 5;
229 var->blue.length = 5;
230 break;
231 case GLAMO_LCD_SRC_ARGB4444:
232 var->transp.offset = 12;
233 var->red.offset = 8;
234 var->green.offset = 4;
235 var->blue.offset = 0;
236 var->transp.length = 4;
237 var->red.length = 4;
238 var->green.length = 4;
239 var->blue.length = 4;
240 break;
241 }
242 break;
243 case 24:
244 case 32:
245 default:
246 /* The Smedia Glamo doesn't support anything but 16bit color */
247 printk(KERN_ERR
248 "Smedia driver does not [yet?] support 24/32bpp\n");
249 return -EINVAL;
250 }
251
252 return 0;
253 }
254
255 static void reg_set_bit_mask(struct glamofb_handle *glamo,
256 u_int16_t reg, u_int16_t mask,
257 u_int16_t val)
258 {
259 u_int16_t tmp;
260
261 val &= mask;
262
263 tmp = reg_read(glamo, reg);
264 tmp &= ~mask;
265 tmp |= val;
266 reg_write(glamo, reg, tmp);
267 }
268
269 #define GLAMO_LCD_WIDTH_MASK 0x03FF
270 #define GLAMO_LCD_HEIGHT_MASK 0x03FF
271 #define GLAMO_LCD_PITCH_MASK 0x07FE
272 #define GLAMO_LCD_HV_TOTAL_MASK 0x03FF
273 #define GLAMO_LCD_HV_RETR_START_MASK 0x03FF
274 #define GLAMO_LCD_HV_RETR_END_MASK 0x03FF
275 #define GLAMO_LCD_HV_RETR_DISP_START_MASK 0x03FF
276 #define GLAMO_LCD_HV_RETR_DISP_END_MASK 0x03FF
277
278 /* the caller has to enxure lock_cmd is held and we are in cmd mode */
279 static void __rotate_lcd(struct glamofb_handle *glamo, __u32 rotation)
280 {
281 int glamo_rot;
282
283 if (glamo->mach_info->glamo->suspending) {
284 dev_err(&glamo->mach_info->glamo->pdev->dev,
285 "IGNORING rotate_lcd while "
286 "suspended\n");
287 return;
288 }
289
290 switch (rotation) {
291 case FB_ROTATE_CW:
292 glamo_rot = GLAMO_LCD_ROT_MODE_90;
293 break;
294 case FB_ROTATE_UD:
295 glamo_rot = GLAMO_LCD_ROT_MODE_180;
296 break;
297 case FB_ROTATE_CCW:
298 glamo_rot = GLAMO_LCD_ROT_MODE_270;
299 break;
300 default:
301 glamo_rot = GLAMO_LCD_ROT_MODE_0;
302 break;
303 }
304
305 reg_set_bit_mask(glamo,
306 GLAMO_REG_LCD_WIDTH,
307 GLAMO_LCD_ROT_MODE_MASK,
308 glamo_rot);
309 reg_set_bit_mask(glamo,
310 GLAMO_REG_LCD_MODE1,
311 GLAMO_LCD_MODE1_ROTATE_EN,
312 (glamo_rot != GLAMO_LCD_ROT_MODE_0) ?
313 GLAMO_LCD_MODE1_ROTATE_EN : 0);
314 }
315
316 static void glamofb_program_mode(struct glamofb_handle* gfb) {
317 int sync, bp, disp, fp, total;
318 unsigned long flags;
319 struct glamo_core *gcore = gfb->mach_info->glamo;
320 struct fb_var_screeninfo *var = &gfb->fb->var;
321
322 dev_dbg(&gcore->pdev->dev,
323 "glamofb_program_mode spin_lock_irqsave\n");
324 spin_lock_irqsave(&gfb->lock_cmd, flags);
325
326 if (glamofb_cmd_mode(gfb, 1))
327 goto out_unlock;
328
329 if (var->pixclock)
330 glamo_engine_reclock(gcore,
331 GLAMO_ENGINE_LCD,
332 gfb->fb->var.pixclock);
333
334 reg_set_bit_mask(gfb,
335 GLAMO_REG_LCD_WIDTH,
336 GLAMO_LCD_WIDTH_MASK,
337 var->xres);
338 reg_set_bit_mask(gfb,
339 GLAMO_REG_LCD_HEIGHT,
340 GLAMO_LCD_HEIGHT_MASK,
341 var->yres);
342 reg_set_bit_mask(gfb,
343 GLAMO_REG_LCD_PITCH,
344 GLAMO_LCD_PITCH_MASK,
345 gfb->fb->fix.line_length);
346
347 /* honour the rotation request */
348 __rotate_lcd(gfb, var->rotate);
349
350 /* update scannout timings */
351 sync = 0;
352 bp = sync + var->hsync_len;
353 disp = bp + var->left_margin;
354 fp = disp + var->xres;
355 total = fp + var->right_margin;
356
357 reg_set_bit_mask(gfb, GLAMO_REG_LCD_HORIZ_TOTAL,
358 GLAMO_LCD_HV_TOTAL_MASK, total);
359 reg_set_bit_mask(gfb, GLAMO_REG_LCD_HORIZ_RETR_START,
360 GLAMO_LCD_HV_RETR_START_MASK, sync);
361 reg_set_bit_mask(gfb, GLAMO_REG_LCD_HORIZ_RETR_END,
362 GLAMO_LCD_HV_RETR_END_MASK, bp);
363 reg_set_bit_mask(gfb, GLAMO_REG_LCD_HORIZ_DISP_START,
364 GLAMO_LCD_HV_RETR_DISP_START_MASK, disp);
365 reg_set_bit_mask(gfb, GLAMO_REG_LCD_HORIZ_DISP_END,
366 GLAMO_LCD_HV_RETR_DISP_END_MASK, fp);
367
368 sync = 0;
369 bp = sync + var->vsync_len;
370 disp = bp + var->upper_margin;
371 fp = disp + var->yres;
372 total = fp + var->lower_margin;
373
374 reg_set_bit_mask(gfb, GLAMO_REG_LCD_VERT_TOTAL,
375 GLAMO_LCD_HV_TOTAL_MASK, total);
376 reg_set_bit_mask(gfb, GLAMO_REG_LCD_VERT_RETR_START,
377 GLAMO_LCD_HV_RETR_START_MASK, sync);
378 reg_set_bit_mask(gfb, GLAMO_REG_LCD_VERT_RETR_END,
379 GLAMO_LCD_HV_RETR_END_MASK, bp);
380 reg_set_bit_mask(gfb, GLAMO_REG_LCD_VERT_DISP_START,
381 GLAMO_LCD_HV_RETR_DISP_START_MASK, disp);
382 reg_set_bit_mask(gfb, GLAMO_REG_LCD_VERT_DISP_END,
383 GLAMO_LCD_HV_RETR_DISP_END_MASK, fp);
384
385 glamofb_cmd_mode(gfb, 0);
386
387 gfb->mode_set = 1;
388
389 out_unlock:
390 dev_dbg(&gcore->pdev->dev,
391 "glamofb_program_mode spin_unlock_irqrestore\n");
392 spin_unlock_irqrestore(&gfb->lock_cmd, flags);
393 }
394
395
396 static int glamofb_pan_display(struct fb_var_screeninfo *var,
397 struct fb_info *info)
398 {
399 return 0;
400 }
401
402 static struct fb_videomode *glamofb_find_mode(struct fb_info *info,
403 struct fb_var_screeninfo *var) {
404 struct glamofb_handle *glamo = info->par;
405 struct glamofb_platform_data *mach_info = glamo->mach_info;
406 struct fb_videomode *mode;
407 int i;
408
409 for(i = mach_info->num_modes, mode = mach_info->modes; i > 0; --i, ++mode) {
410 if (mode->xres == var->xres &&
411 mode->yres == var->yres)
412 return mode;
413 }
414
415 return NULL;
416 }
417
418 static int glamofb_set_par(struct fb_info *info)
419 {
420 struct glamofb_handle *glamo = info->par;
421 struct fb_var_screeninfo *var = &info->var;
422 struct fb_videomode *mode;
423
424 if (glamo->mach_info->glamo->suspending) {
425 dev_err(&glamo->mach_info->glamo->pdev->dev,
426 "IGNORING glamofb_set_par while "
427 "suspended\n");
428 return -EBUSY;
429 }
430
431 mode = glamofb_find_mode(info, var);
432 if (!mode)
433 return -EINVAL;
434
435 fb_videomode_to_var(var, mode);
436
437 info->mode = mode;
438
439 glamo->mode_set = 0;
440
441 switch(var->rotate) {
442 case FB_ROTATE_CW:
443 case FB_ROTATE_CCW:
444 info->fix.line_length = (var->yres * var->bits_per_pixel) / 8;
445 /* FIXME: Limit pixelclock */
446 var->pixclock *= 2;
447 break;
448 default:
449 info->fix.line_length = (var->xres * var->bits_per_pixel) / 8;
450 break;
451 }
452
453 if(glamo->output_enabled)
454 glamofb_program_mode(glamo);
455
456 return 0;
457 }
458
459 static int glamofb_blank(int blank_mode, struct fb_info *info)
460 {
461 struct glamofb_handle *gfb = info->par;
462
463 dev_dbg(gfb->dev, "glamofb_blank(%u)\n", blank_mode);
464
465 switch (blank_mode) {
466 case FB_BLANK_VSYNC_SUSPEND:
467 case FB_BLANK_HSYNC_SUSPEND:
468 /* FIXME: add pdata hook/flag to indicate whether
469 * we should already switch off pixel clock here */
470 break;
471 case FB_BLANK_POWERDOWN:
472 /* disable the pixel clock */
473 glamo_output_disable(gfb);
474 gfb->blank_mode = blank_mode;
475 break;
476 case FB_BLANK_UNBLANK:
477 case FB_BLANK_NORMAL:
478 glamo_output_enable(gfb);
479 gfb->blank_mode = blank_mode;
480 break;
481 }
482
483 /* FIXME: once we have proper clock management in glamo-core,
484 * we can determine if other units need MCLK1 or the PLL, and
485 * disable it if not used. */
486 return 0;
487 }
488
489 static inline unsigned int chan_to_field(unsigned int chan,
490 struct fb_bitfield *bf)
491 {
492 chan &= 0xffff;
493 chan >>= 16 - bf->length;
494 return chan << bf->offset;
495 }
496
497 static int glamofb_setcolreg(unsigned regno,
498 unsigned red, unsigned green, unsigned blue,
499 unsigned transp, struct fb_info *info)
500 {
501 struct glamofb_handle *glamo = info->par;
502 unsigned int val;
503
504 if (glamo->mach_info->glamo->suspending) {
505 dev_err(&glamo->mach_info->glamo->pdev->dev,
506 "IGNORING glamofb_set_par while "
507 "suspended\n");
508 return -EBUSY;
509 }
510
511 switch (glamo->fb->fix.visual) {
512 case FB_VISUAL_TRUECOLOR:
513 case FB_VISUAL_DIRECTCOLOR:
514 /* true-colour, use pseuo-palette */
515
516 if (regno < 16) {
517 u32 *pal = glamo->fb->pseudo_palette;
518
519 val = chan_to_field(red, &glamo->fb->var.red);
520 val |= chan_to_field(green, &glamo->fb->var.green);
521 val |= chan_to_field(blue, &glamo->fb->var.blue);
522
523 pal[regno] = val;
524 };
525 break;
526 default:
527 return 1; /* unknown type */
528 }
529
530 return 0;
531 }
532
533 static int glamofb_ioctl(struct fb_info *info, unsigned int cmd,
534 unsigned long arg) {
535 struct glamofb_handle *gfb = (struct glamofb_handle*)info->par;
536 struct glamo_core *gcore = gfb->mach_info->glamo;
537 int retval = -ENOTTY;
538
539 switch (cmd) {
540 case GLAMOFB_ENGINE_ENABLE:
541 retval = glamo_engine_enable(gcore, arg);
542 break;
543 case GLAMOFB_ENGINE_DISABLE:
544 retval = glamo_engine_disable(gcore, arg);
545 break;
546 case GLAMOFB_ENGINE_RESET:
547 glamo_engine_reset(gcore, arg);
548 retval = 0;
549 break;
550 default:
551 break;
552 }
553
554 return retval;
555 }
556
557
558 #ifdef CONFIG_MFD_GLAMO_HWACCEL
559 static inline void glamofb_vsync_wait(struct glamofb_handle *glamo,
560 int line, int size, int range)
561 {
562 int count[2];
563
564 do {
565 count[0] = reg_read(glamo, GLAMO_REG_LCD_STATUS2) & 0x3ff;
566 count[1] = reg_read(glamo, GLAMO_REG_LCD_STATUS2) & 0x3ff;
567 } while (count[0] != count[1] ||
568 (line < count[0] + range &&
569 size > count[0] - range) ||
570 count[0] < range * 2);
571 }
572
573 /*
574 * Enable/disable the hardware cursor mode altogether
575 * (for blinking and such, use glamofb_cursor()).
576 */
577 static void glamofb_cursor_onoff(struct glamofb_handle *glamo, int on)
578 {
579 int y, size;
580
581 if (glamo->cursor_on) {
582 y = reg_read(glamo, GLAMO_REG_LCD_CURSOR_Y_POS);
583 size = reg_read(glamo, GLAMO_REG_LCD_CURSOR_Y_SIZE);
584
585 glamofb_vsync_wait(glamo, y, size, 30);
586 }
587
588 reg_set_bit_mask(glamo, GLAMO_REG_LCD_MODE1,
589 GLAMO_LCD_MODE1_CURSOR_EN,
590 on ? GLAMO_LCD_MODE1_CURSOR_EN : 0);
591 glamo->cursor_on = on;
592
593 /* Hide the cursor by default */
594 reg_write(glamo, GLAMO_REG_LCD_CURSOR_X_SIZE, 0);
595 }
596
597 static int glamofb_cursor(struct fb_info *info, struct fb_cursor *cursor)
598 {
599 struct glamofb_handle *glamo = info->par;
600 unsigned long flags;
601
602 spin_lock_irqsave(&glamo->lock_cmd, flags);
603
604 reg_write(glamo, GLAMO_REG_LCD_CURSOR_X_SIZE,
605 cursor->enable ? cursor->image.width : 0);
606
607 if (cursor->set & FB_CUR_SETPOS) {
608 reg_write(glamo, GLAMO_REG_LCD_CURSOR_X_POS,
609 cursor->image.dx);
610 reg_write(glamo, GLAMO_REG_LCD_CURSOR_Y_POS,
611 cursor->image.dy);
612 }
613
614 if (cursor->set & FB_CUR_SETCMAP) {
615 uint16_t fg = glamo->pseudo_pal[cursor->image.fg_color];
616 uint16_t bg = glamo->pseudo_pal[cursor->image.bg_color];
617
618 reg_write(glamo, GLAMO_REG_LCD_CURSOR_FG_COLOR, fg);
619 reg_write(glamo, GLAMO_REG_LCD_CURSOR_BG_COLOR, bg);
620 reg_write(glamo, GLAMO_REG_LCD_CURSOR_DST_COLOR, fg);
621 }
622
623 if (cursor->set & FB_CUR_SETHOT)
624 reg_write(glamo, GLAMO_REG_LCD_CURSOR_PRESET,
625 (cursor->hot.x << 8) | cursor->hot.y);
626
627 if ((cursor->set & FB_CUR_SETSIZE) ||
628 (cursor->set & (FB_CUR_SETIMAGE | FB_CUR_SETSHAPE))) {
629 int x, y, pitch, op;
630 const uint8_t *pcol = cursor->image.data;
631 const uint8_t *pmsk = cursor->mask;
632 uint8_t __iomem *dst = glamo->cursor_addr;
633 uint8_t dcol = 0;
634 uint8_t dmsk = 0;
635 uint8_t byte = 0;
636
637 if (cursor->image.depth > 1) {
638 spin_unlock_irqrestore(&glamo->lock_cmd, flags);
639 return -EINVAL;
640 }
641
642 pitch = ((cursor->image.width + 7) >> 2) & ~1;
643 reg_write(glamo, GLAMO_REG_LCD_CURSOR_PITCH,
644 pitch);
645 reg_write(glamo, GLAMO_REG_LCD_CURSOR_Y_SIZE,
646 cursor->image.height);
647
648 for (y = 0; y < cursor->image.height; y++) {
649 byte = 0;
650 for (x = 0; x < cursor->image.width; x++) {
651 if ((x % 8) == 0) {
652 dcol = *pcol++;
653 dmsk = *pmsk++;
654 } else {
655 dcol >>= 1;
656 dmsk >>= 1;
657 }
658
659 if (cursor->rop == ROP_COPY)
660 op = (dmsk & 1) ?
661 (dcol & 1) ? 1 : 3 : 0;
662 else
663 op = ((dmsk & 1) << 1) |
664 ((dcol & 1) << 0);
665 byte |= op << ((x & 3) << 1);
666
667 if (x % 4 == 3) {
668 writeb(byte, dst + x / 4);
669 byte = 0;
670 }
671 }
672 if (x % 4) {
673 writeb(byte, dst + x / 4);
674 byte = 0;
675 }
676
677 dst += pitch;
678 }
679 }
680
681 spin_unlock_irqrestore(&glamo->lock_cmd, flags);
682
683 return 0;
684 }
685 #endif
686
687 static inline int glamofb_cmdq_empty(struct glamofb_handle *gfb)
688 {
689 /* DGCMdQempty -- 1 == command queue is empty */
690 return reg_read(gfb, GLAMO_REG_LCD_STATUS1) & (1 << 15);
691 }
692
693 /* call holding gfb->lock_cmd when locking, until you unlock */
694 int glamofb_cmd_mode(struct glamofb_handle *gfb, int on)
695 {
696 int timeout = 2000000;
697
698 if (gfb->mach_info->glamo->suspending) {
699 dev_err(&gfb->mach_info->glamo->pdev->dev,
700 "IGNORING glamofb_cmd_mode while "
701 "suspended\n");
702 return -EBUSY;
703 }
704
705 dev_dbg(gfb->dev, "glamofb_cmd_mode(gfb=%p, on=%d)\n", gfb, on);
706 if (on) {
707 dev_dbg(gfb->dev, "%s: waiting for cmdq empty: ",
708 __func__);
709 while ((!glamofb_cmdq_empty(gfb)) && (timeout--))
710 yield();
711 if (timeout < 0) {
712 printk(KERN_ERR"*************"
713 "glamofb cmd_queue never got empty"
714 "*************\n");
715 return -EIO;
716 }
717 dev_dbg(gfb->dev, "empty!\n");
718
719 /* display the entire frame then switch to command */
720 reg_write(gfb, GLAMO_REG_LCD_COMMAND1,
721 GLAMO_LCD_CMD_TYPE_DISP |
722 GLAMO_LCD_CMD_DATA_FIRE_VSYNC);
723
724 /* wait until lcd idle */
725 dev_dbg(gfb->dev, "waiting for lcd idle: ");
726 timeout = 2000000;
727 while ((!reg_read(gfb, GLAMO_REG_LCD_STATUS2) & (1 << 12)) &&
728 (timeout--))
729 /* yield() */;
730 if (timeout < 0) {
731 printk(KERN_ERR"*************"
732 "glamofb lcd never idle"
733 "*************\n");
734 return -EIO;
735 }
736
737 mdelay(100);
738
739 dev_dbg(gfb->dev, "cmd mode entered\n");
740
741 } else {
742 /* RGB interface needs vsync/hsync */
743 if (reg_read(gfb, GLAMO_REG_LCD_MODE3) & GLAMO_LCD_MODE3_RGB)
744 reg_write(gfb, GLAMO_REG_LCD_COMMAND1,
745 GLAMO_LCD_CMD_TYPE_DISP |
746 GLAMO_LCD_CMD_DATA_DISP_SYNC);
747
748 reg_write(gfb, GLAMO_REG_LCD_COMMAND1,
749 GLAMO_LCD_CMD_TYPE_DISP |
750 GLAMO_LCD_CMD_DATA_DISP_FIRE);
751 }
752
753 return 0;
754 }
755 EXPORT_SYMBOL_GPL(glamofb_cmd_mode);
756
757
758 int glamofb_cmd_write(struct glamofb_handle *gfb, u_int16_t val)
759 {
760 int timeout = 200000;
761
762 if (gfb->mach_info->glamo->suspending) {
763 dev_err(&gfb->mach_info->glamo->pdev->dev,
764 "IGNORING glamofb_cmd_write while "
765 "suspended\n");
766 return -EBUSY;
767 }
768
769 dev_dbg(gfb->dev, "%s: waiting for cmdq empty\n", __func__);
770 while ((!glamofb_cmdq_empty(gfb)) && (timeout--))
771 yield();
772 if (timeout < 0) {
773 printk(KERN_ERR"*************"
774 "glamofb cmd_queue never got empty"
775 "*************\n");
776 return 1;
777 }
778 dev_dbg(gfb->dev, "idle, writing 0x%04x\n", val);
779
780 reg_write(gfb, GLAMO_REG_LCD_COMMAND1, val);
781
782 return 0;
783 }
784 EXPORT_SYMBOL_GPL(glamofb_cmd_write);
785
786 static struct fb_ops glamofb_ops = {
787 .owner = THIS_MODULE,
788 .fb_check_var = glamofb_check_var,
789 .fb_pan_display = glamofb_pan_display,
790 .fb_set_par = glamofb_set_par,
791 .fb_blank = glamofb_blank,
792 .fb_setcolreg = glamofb_setcolreg,
793 .fb_ioctl = glamofb_ioctl,
794 #ifdef CONFIG_MFD_GLAMO_HWACCEL
795 .fb_cursor = glamofb_cursor,
796 #endif
797 .fb_fillrect = cfb_fillrect,
798 .fb_copyarea = cfb_copyarea,
799 .fb_imageblit = cfb_imageblit,
800 };
801
802 static int glamofb_init_regs(struct glamofb_handle *glamo)
803 {
804 struct fb_info *info = glamo->fb;
805
806 glamofb_check_var(&info->var, info);
807 glamofb_run_script(glamo, glamo_regs, ARRAY_SIZE(glamo_regs));
808 glamofb_set_par(info);
809
810 return 0;
811 }
812
813 static int __init glamofb_probe(struct platform_device *pdev)
814 {
815 int rc = -EIO;
816 struct fb_info *fbinfo;
817 struct glamofb_handle *glamofb;
818 struct glamofb_platform_data *mach_info = pdev->dev.platform_data;
819
820 printk(KERN_INFO "SMEDIA Glamo frame buffer driver (C) 2007 "
821 "Openmoko, Inc.\n");
822
823 fbinfo = framebuffer_alloc(sizeof(struct glamofb_handle), &pdev->dev);
824 if (!fbinfo)
825 return -ENOMEM;
826
827 glamofb = fbinfo->par;
828 glamofb->fb = fbinfo;
829 glamofb->dev = &pdev->dev;
830
831 glamofb->blank_mode = FB_BLANK_POWERDOWN;
832
833 strcpy(fbinfo->fix.id, "SMedia Glamo");
834
835 glamofb->reg = platform_get_resource_byname(pdev, IORESOURCE_MEM,
836 "glamo-fb-regs");
837 if (!glamofb->reg) {
838 dev_err(&pdev->dev, "platform device with no registers?\n");
839 rc = -ENOENT;
840 goto out_free;
841 }
842
843 glamofb->fb_res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
844 "glamo-fb-mem");
845 if (!glamofb->fb_res) {
846 dev_err(&pdev->dev, "platform device with no memory ?\n");
847 rc = -ENOENT;
848 goto out_free;
849 }
850
851 glamofb->reg = request_mem_region(glamofb->reg->start,
852 resource_size(glamofb->reg), pdev->name);
853 if (!glamofb->reg) {
854 dev_err(&pdev->dev, "failed to request mmio region\n");
855 goto out_free;
856 }
857
858 glamofb->fb_res = request_mem_region(glamofb->fb_res->start,
859 resource_size(glamofb->fb_res),
860 pdev->name);
861 if (!glamofb->fb_res) {
862 dev_err(&pdev->dev, "failed to request vram region\n");
863 goto out_release_reg;
864 }
865
866 /* we want to remap only the registers required for this core
867 * driver. */
868 glamofb->base = ioremap_nocache(glamofb->reg->start, resource_size(glamofb->reg));
869 if (!glamofb->base) {
870 dev_err(&pdev->dev, "failed to ioremap() mmio memory\n");
871 goto out_release_fb;
872 }
873
874 fbinfo->fix.smem_start = (unsigned long) glamofb->fb_res->start;
875 fbinfo->fix.smem_len = (__u32) resource_size(glamofb->fb_res);
876
877 fbinfo->screen_base = ioremap(glamofb->fb_res->start,
878 resource_size(glamofb->fb_res));
879 if (!fbinfo->screen_base) {
880 dev_err(&pdev->dev, "failed to ioremap() vram memory\n");
881 goto out_release_fb;
882 }
883 glamofb->cursor_addr = fbinfo->screen_base + 0x12C000;
884
885 platform_set_drvdata(pdev, glamofb);
886
887 glamofb->mach_info = pdev->dev.platform_data;
888
889 fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
890 fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
891 fbinfo->fix.type_aux = 0;
892 fbinfo->fix.xpanstep = 0;
893 fbinfo->fix.ypanstep = 0;
894 fbinfo->fix.ywrapstep = 0;
895 fbinfo->fix.accel = FB_ACCEL_GLAMO;
896
897
898 fbinfo->fbops = &glamofb_ops;
899 fbinfo->flags = FBINFO_FLAG_DEFAULT;
900 fbinfo->pseudo_palette = &glamofb->pseudo_pal;
901
902 fbinfo->mode = mach_info->modes;
903 fb_videomode_to_var(&fbinfo->var, fbinfo->mode);
904 fbinfo->var.bits_per_pixel = 16;
905 fbinfo->var.nonstd = 0;
906 fbinfo->var.activate = FB_ACTIVATE_NOW;
907 fbinfo->var.height = mach_info->height;
908 fbinfo->var.width = mach_info->width;
909 fbinfo->var.accel_flags = 0;
910 fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
911
912 glamo_engine_enable(mach_info->glamo, GLAMO_ENGINE_LCD);
913 glamo_engine_reset(mach_info->glamo, GLAMO_ENGINE_LCD);
914 glamofb->output_enabled = 1;
915 glamofb->mode_set = 1;
916
917 dev_info(&pdev->dev, "spin_lock_init\n");
918 spin_lock_init(&glamofb->lock_cmd);
919 glamofb_init_regs(glamofb);
920 #ifdef CONFIG_MFD_GLAMO_HWACCEL
921 glamofb_cursor_onoff(glamofb, 1);
922 #endif
923
924 fb_videomode_to_modelist(mach_info->modes, mach_info->num_modes,
925 &fbinfo->modelist);
926
927 rc = register_framebuffer(fbinfo);
928 if (rc < 0) {
929 dev_err(&pdev->dev, "failed to register framebuffer\n");
930 goto out_unmap_fb;
931 }
932
933 printk(KERN_INFO "fb%d: %s frame buffer device\n",
934 fbinfo->node, fbinfo->fix.id);
935
936 return 0;
937
938 out_unmap_fb:
939 iounmap(fbinfo->screen_base);
940 iounmap(glamofb->base);
941 out_release_fb:
942 release_mem_region(glamofb->fb_res->start, resource_size(glamofb->fb_res));
943 out_release_reg:
944 release_mem_region(glamofb->reg->start, resource_size(glamofb->reg));
945 out_free:
946 framebuffer_release(fbinfo);
947 return rc;
948 }
949
950 static int glamofb_remove(struct platform_device *pdev)
951 {
952 struct glamofb_handle *glamofb = platform_get_drvdata(pdev);
953
954 platform_set_drvdata(pdev, NULL);
955 iounmap(glamofb->base);
956 release_mem_region(glamofb->reg->start, resource_size(glamofb->reg));
957 kfree(glamofb);
958
959 return 0;
960 }
961
962 #ifdef CONFIG_PM
963
964 static int glamofb_suspend(struct platform_device *pdev, pm_message_t state)
965 {
966 struct glamofb_handle *gfb = platform_get_drvdata(pdev);
967
968 /* we need to stop anything touching our framebuffer */
969 fb_set_suspend(gfb->fb, 1);
970
971 /* seriously -- nobody is allowed to touch glamo memory when we
972 * are suspended or we lock on nWAIT
973 */
974 /* iounmap(gfb->fb->screen_base); */
975
976 return 0;
977 }
978
979 static int glamofb_resume(struct platform_device *pdev)
980 {
981 struct glamofb_handle *gfb = platform_get_drvdata(pdev);
982 struct glamofb_platform_data *mach_info = pdev->dev.platform_data;
983
984 /* OK let's allow framebuffer ops again */
985 /* gfb->fb->screen_base = ioremap(gfb->fb_res->start,
986 resource_size(gfb->fb_res)); */
987 glamo_engine_enable(mach_info->glamo, GLAMO_ENGINE_LCD);
988 glamo_engine_reset(mach_info->glamo, GLAMO_ENGINE_LCD);
989
990 printk(KERN_ERR"spin_lock_init\n");
991 spin_lock_init(&gfb->lock_cmd);
992 glamofb_init_regs(gfb);
993 #ifdef CONFIG_MFD_GLAMO_HWACCEL
994 glamofb_cursor_onoff(gfb, 1);
995 #endif
996
997 fb_set_suspend(gfb->fb, 0);
998
999 return 0;
1000 }
1001 #else
1002 #define glamofb_suspend NULL
1003 #define glamofb_resume NULL
1004 #endif
1005
1006 static struct platform_driver glamofb_driver = {
1007 .probe = glamofb_probe,
1008 .remove = glamofb_remove,
1009 .suspend = glamofb_suspend,
1010 .resume = glamofb_resume,
1011 .driver = {
1012 .name = "glamo-fb",
1013 .owner = THIS_MODULE,
1014 },
1015 };
1016
1017 static int __devinit glamofb_init(void)
1018 {
1019 return platform_driver_register(&glamofb_driver);
1020 }
1021
1022 static void __exit glamofb_cleanup(void)
1023 {
1024 platform_driver_unregister(&glamofb_driver);
1025 }
1026
1027 module_init(glamofb_init);
1028 module_exit(glamofb_cleanup);
1029
1030 MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
1031 MODULE_DESCRIPTION("Smedia Glamo 336x/337x framebuffer driver");
1032 MODULE_LICENSE("GPL");
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