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kernel: check return code of nla_parse in pcomp_lzma on 2.6.31
[openwrt.git] / target / linux / s3c24xx / files-2.6.31 / 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/console.h>
30 #include <linux/init.h>
31 #include <linux/platform_device.h>
32 #include <linux/spinlock.h>
33 #include <linux/io.h>
34 #include <linux/mfd/glamo.h>
35
36 #include <asm/div64.h>
37
38 #ifdef CONFIG_PM
39 #include <linux/pm.h>
40 #endif
41
42 #include <linux/glamofb.h>
43
44 #include "glamo-regs.h"
45 #include "glamo-core.h"
46
47 static void glamofb_program_mode(struct glamofb_handle* glamo);
48
49 struct glamofb_handle {
50 struct glamo_core *core;
51 struct fb_info *fb;
52 struct device *dev;
53 struct resource *reg;
54 struct resource *fb_res;
55 char __iomem *base;
56 struct glamo_fb_platform_data *mach_info;
57 char __iomem *cursor_addr;
58 int cursor_on;
59 u_int32_t pseudo_pal[16];
60 spinlock_t lock_cmd;
61 int blank_mode;
62 int mode_set; /* 0 if the current display mode hasn't been set on the glamo */
63 int output_enabled; /* 0 if the video output is disabled */
64 };
65
66 static void glamo_output_enable(struct glamofb_handle *gfb) {
67 struct glamo_core *gcore = gfb->core;
68
69 if (gfb->output_enabled)
70 return;
71
72 /* enable the pixel clock if off */
73 glamo_engine_enable(gcore, GLAMO_ENGINE_LCD);
74
75 gfb->output_enabled = 1;
76 if (!gfb->mode_set)
77 glamofb_program_mode(gfb);
78 }
79
80 static void glamo_output_disable(struct glamofb_handle *gfb) {
81 struct glamo_core *gcore = gfb->core;
82
83 if (!gfb->output_enabled)
84 return;
85
86 /* enable the pixel clock if off */
87 glamo_engine_suspend(gcore, GLAMO_ENGINE_LCD);
88
89 gfb->output_enabled = 0;
90 }
91
92
93 static int reg_read(struct glamofb_handle *glamo,
94 u_int16_t reg)
95 {
96 int i = 0;
97
98 for (i = 0; i != 2; i++)
99 nop();
100
101 return readw(glamo->base + reg);
102 }
103
104 static void reg_write(struct glamofb_handle *glamo,
105 u_int16_t reg, u_int16_t val)
106 {
107 int i = 0;
108
109 for (i = 0; i != 2; i++)
110 nop();
111
112 writew(val, glamo->base + reg);
113 }
114
115 static struct glamo_script glamo_regs[] = {
116 { GLAMO_REG_LCD_MODE1, 0x0020 },
117 /* no display rotation, no hardware cursor, no dither, no gamma,
118 * no retrace flip, vsync low-active, hsync low active,
119 * no TVCLK, no partial display, hw dest color from fb,
120 * no partial display mode, LCD1, software flip, */
121 { GLAMO_REG_LCD_MODE2, 0x9020 },
122 /* video flip, no ptr, no ptr, dhclk off,
123 * normal mode, no cpuif,
124 * res, serial msb first, single fb, no fr ctrl,
125 * cpu if bits all zero, no crc
126 * 0000 0000 0010 0000 */
127 { GLAMO_REG_LCD_MODE3, 0x0b40 },
128 /* src data rgb565, res, 18bit rgb666
129 * 000 01 011 0100 0000 */
130 { GLAMO_REG_LCD_POLARITY, 0x440c },
131 /* DE high active, no cpu/lcd if, cs0 force low, a0 low active,
132 * np cpu if, 9bit serial data, sclk rising edge latch data
133 * 01 00 0 100 0 000 01 0 0 */
134 /* The following values assume 640*480@16bpp */
135 { GLAMO_REG_LCD_A_BASE1, 0x0000 }, /* display A base address 15:0 */
136 { GLAMO_REG_LCD_A_BASE2, 0x0000 }, /* display A base address 22:16 */
137 { GLAMO_REG_LCD_CURSOR_BASE1, 0xC000 }, /* cursor base address 15:0 */
138 { GLAMO_REG_LCD_CURSOR_BASE2, 0x0012 }, /* cursor base address 22:16 */
139 { GLAMO_REG_LCD_COMMAND2, 0x0000 }, /* display page A */
140 };
141
142 static int glamofb_run_script(struct glamofb_handle *glamo,
143 struct glamo_script *script, int len)
144 {
145 int i;
146
147 for (i = 0; i < len; i++) {
148 struct glamo_script *line = &script[i];
149
150 if (line->reg == 0xffff)
151 return 0;
152 else if (line->reg == 0xfffe)
153 msleep(line->val);
154 else
155 reg_write(glamo, script[i].reg, script[i].val);
156 }
157
158 return 0;
159 }
160
161 static int glamofb_check_var(struct fb_var_screeninfo *var,
162 struct fb_info *info)
163 {
164 struct glamofb_handle *glamo = info->par;
165
166 if (var->bits_per_pixel != 16)
167 var->bits_per_pixel = 16;
168
169 var->height = glamo->mach_info->height;
170 var->width = glamo->mach_info->width;
171
172 /* FIXME: set rgb positions */
173 switch (var->bits_per_pixel) {
174 case 16:
175 switch (reg_read(glamo, GLAMO_REG_LCD_MODE3) & 0xc000) {
176 case GLAMO_LCD_SRC_RGB565:
177 var->red.offset = 11;
178 var->green.offset = 5;
179 var->blue.offset = 0;
180 var->red.length = 5;
181 var->green.length = 6;
182 var->blue.length = 5;
183 var->transp.length = 0;
184 break;
185 case GLAMO_LCD_SRC_ARGB1555:
186 var->transp.offset = 15;
187 var->red.offset = 10;
188 var->green.offset = 5;
189 var->blue.offset = 0;
190 var->transp.length = 1;
191 var->red.length = 5;
192 var->green.length = 5;
193 var->blue.length = 5;
194 break;
195 case GLAMO_LCD_SRC_ARGB4444:
196 var->transp.offset = 12;
197 var->red.offset = 8;
198 var->green.offset = 4;
199 var->blue.offset = 0;
200 var->transp.length = 4;
201 var->red.length = 4;
202 var->green.length = 4;
203 var->blue.length = 4;
204 break;
205 }
206 break;
207 case 24:
208 case 32:
209 default:
210 /* The Smedia Glamo doesn't support anything but 16bit color */
211 printk(KERN_ERR
212 "Smedia driver does not [yet?] support 24/32bpp\n");
213 return -EINVAL;
214 }
215
216 return 0;
217 }
218
219 static void reg_set_bit_mask(struct glamofb_handle *glamo,
220 u_int16_t reg, u_int16_t mask,
221 u_int16_t val)
222 {
223 u_int16_t tmp;
224
225 val &= mask;
226
227 tmp = reg_read(glamo, reg);
228 tmp &= ~mask;
229 tmp |= val;
230 reg_write(glamo, reg, tmp);
231 }
232
233 #define GLAMO_LCD_WIDTH_MASK 0x03FF
234 #define GLAMO_LCD_HEIGHT_MASK 0x03FF
235 #define GLAMO_LCD_PITCH_MASK 0x07FE
236 #define GLAMO_LCD_HV_TOTAL_MASK 0x03FF
237 #define GLAMO_LCD_HV_RETR_START_MASK 0x03FF
238 #define GLAMO_LCD_HV_RETR_END_MASK 0x03FF
239 #define GLAMO_LCD_HV_RETR_DISP_START_MASK 0x03FF
240 #define GLAMO_LCD_HV_RETR_DISP_END_MASK 0x03FF
241
242 /* the caller has to enxure lock_cmd is held and we are in cmd mode */
243 static void __rotate_lcd(struct glamofb_handle *glamo, __u32 rotation)
244 {
245 int glamo_rot;
246
247 switch (rotation) {
248 case FB_ROTATE_CW:
249 glamo_rot = GLAMO_LCD_ROT_MODE_90;
250 break;
251 case FB_ROTATE_UD:
252 glamo_rot = GLAMO_LCD_ROT_MODE_180;
253 break;
254 case FB_ROTATE_CCW:
255 glamo_rot = GLAMO_LCD_ROT_MODE_270;
256 break;
257 default:
258 glamo_rot = GLAMO_LCD_ROT_MODE_0;
259 break;
260 }
261
262 reg_set_bit_mask(glamo,
263 GLAMO_REG_LCD_WIDTH,
264 GLAMO_LCD_ROT_MODE_MASK,
265 glamo_rot);
266 reg_set_bit_mask(glamo,
267 GLAMO_REG_LCD_MODE1,
268 GLAMO_LCD_MODE1_ROTATE_EN,
269 (glamo_rot != GLAMO_LCD_ROT_MODE_0) ?
270 GLAMO_LCD_MODE1_ROTATE_EN : 0);
271 }
272
273 static void glamofb_program_mode(struct glamofb_handle* gfb) {
274 int sync, bp, disp, fp, total;
275 unsigned long flags;
276 struct glamo_core *gcore = gfb->core;
277 struct fb_var_screeninfo *var = &gfb->fb->var;
278
279 dev_dbg(&gcore->pdev->dev,
280 "glamofb_program_mode spin_lock_irqsave\n");
281 spin_lock_irqsave(&gfb->lock_cmd, flags);
282
283 if (glamofb_cmd_mode(gfb, 1))
284 goto out_unlock;
285
286 if (var->pixclock)
287 glamo_engine_reclock(gcore,
288 GLAMO_ENGINE_LCD,
289 (1000000000UL / gfb->fb->var.pixclock) * 1000);
290
291 reg_set_bit_mask(gfb,
292 GLAMO_REG_LCD_WIDTH,
293 GLAMO_LCD_WIDTH_MASK,
294 var->xres);
295 reg_set_bit_mask(gfb,
296 GLAMO_REG_LCD_HEIGHT,
297 GLAMO_LCD_HEIGHT_MASK,
298 var->yres);
299 reg_set_bit_mask(gfb,
300 GLAMO_REG_LCD_PITCH,
301 GLAMO_LCD_PITCH_MASK,
302 gfb->fb->fix.line_length);
303
304 /* honour the rotation request */
305 __rotate_lcd(gfb, var->rotate);
306
307 /* update scannout timings */
308 sync = 0;
309 bp = sync + var->hsync_len;
310 disp = bp + var->left_margin;
311 fp = disp + var->xres;
312 total = fp + var->right_margin;
313
314 reg_set_bit_mask(gfb, GLAMO_REG_LCD_HORIZ_TOTAL,
315 GLAMO_LCD_HV_TOTAL_MASK, total);
316 reg_set_bit_mask(gfb, GLAMO_REG_LCD_HORIZ_RETR_START,
317 GLAMO_LCD_HV_RETR_START_MASK, sync);
318 reg_set_bit_mask(gfb, GLAMO_REG_LCD_HORIZ_RETR_END,
319 GLAMO_LCD_HV_RETR_END_MASK, bp);
320 reg_set_bit_mask(gfb, GLAMO_REG_LCD_HORIZ_DISP_START,
321 GLAMO_LCD_HV_RETR_DISP_START_MASK, disp);
322 reg_set_bit_mask(gfb, GLAMO_REG_LCD_HORIZ_DISP_END,
323 GLAMO_LCD_HV_RETR_DISP_END_MASK, fp);
324
325 sync = 0;
326 bp = sync + var->vsync_len;
327 disp = bp + var->upper_margin;
328 fp = disp + var->yres;
329 total = fp + var->lower_margin;
330
331 reg_set_bit_mask(gfb, GLAMO_REG_LCD_VERT_TOTAL,
332 GLAMO_LCD_HV_TOTAL_MASK, total);
333 reg_set_bit_mask(gfb, GLAMO_REG_LCD_VERT_RETR_START,
334 GLAMO_LCD_HV_RETR_START_MASK, sync);
335 reg_set_bit_mask(gfb, GLAMO_REG_LCD_VERT_RETR_END,
336 GLAMO_LCD_HV_RETR_END_MASK, bp);
337 reg_set_bit_mask(gfb, GLAMO_REG_LCD_VERT_DISP_START,
338 GLAMO_LCD_HV_RETR_DISP_START_MASK, disp);
339 reg_set_bit_mask(gfb, GLAMO_REG_LCD_VERT_DISP_END,
340 GLAMO_LCD_HV_RETR_DISP_END_MASK, fp);
341
342 glamofb_cmd_mode(gfb, 0);
343
344 gfb->mode_set = 1;
345
346 out_unlock:
347 dev_dbg(&gcore->pdev->dev,
348 "glamofb_program_mode spin_unlock_irqrestore\n");
349 spin_unlock_irqrestore(&gfb->lock_cmd, flags);
350 }
351
352
353 static int glamofb_pan_display(struct fb_var_screeninfo *var,
354 struct fb_info *info)
355 {
356 return 0;
357 }
358
359 static struct fb_videomode *glamofb_find_mode(struct fb_info *info,
360 struct fb_var_screeninfo *var) {
361 struct glamofb_handle *glamo = info->par;
362 struct glamo_fb_platform_data *mach_info = glamo->mach_info;
363 struct fb_videomode *mode;
364 int i;
365
366 for(i = mach_info->num_modes, mode = mach_info->modes; i > 0; --i, ++mode) {
367 if (mode->xres == var->xres &&
368 mode->yres == var->yres)
369 return mode;
370 }
371
372 return NULL;
373 }
374
375 static int glamofb_set_par(struct fb_info *info)
376 {
377 struct glamofb_handle *glamo = info->par;
378 struct fb_var_screeninfo *var = &info->var;
379 struct fb_videomode *mode;
380
381 mode = glamofb_find_mode(info, var);
382 if (!mode)
383 return -EINVAL;
384
385 fb_videomode_to_var(var, mode);
386
387 info->mode = mode;
388
389 glamo->mode_set = 0;
390
391 switch(var->rotate) {
392 case FB_ROTATE_CW:
393 case FB_ROTATE_CCW:
394 info->fix.line_length = (var->yres * var->bits_per_pixel) / 8;
395 /* FIXME: Limit pixelclock */
396 var->pixclock *= 2;
397 break;
398 default:
399 info->fix.line_length = (var->xres * var->bits_per_pixel) / 8;
400 break;
401 }
402
403 if(glamo->output_enabled)
404 glamofb_program_mode(glamo);
405
406 return 0;
407 }
408
409 static int glamofb_blank(int blank_mode, struct fb_info *info)
410 {
411 struct glamofb_handle *gfb = info->par;
412
413 dev_dbg(gfb->dev, "glamofb_blank(%u)\n", blank_mode);
414
415 switch (blank_mode) {
416 case FB_BLANK_VSYNC_SUSPEND:
417 case FB_BLANK_HSYNC_SUSPEND:
418 /* FIXME: add pdata hook/flag to indicate whether
419 * we should already switch off pixel clock here */
420 break;
421 case FB_BLANK_POWERDOWN:
422 /* disable the pixel clock */
423 glamo_output_disable(gfb);
424 gfb->blank_mode = blank_mode;
425 break;
426 case FB_BLANK_UNBLANK:
427 case FB_BLANK_NORMAL:
428 glamo_output_enable(gfb);
429 gfb->blank_mode = blank_mode;
430 break;
431 }
432
433 /* FIXME: once we have proper clock management in glamo-core,
434 * we can determine if other units need MCLK1 or the PLL, and
435 * disable it if not used. */
436 return 0;
437 }
438
439 static inline unsigned int chan_to_field(unsigned int chan,
440 struct fb_bitfield *bf)
441 {
442 chan &= 0xffff;
443 chan >>= 16 - bf->length;
444 return chan << bf->offset;
445 }
446
447 static int glamofb_setcolreg(unsigned regno,
448 unsigned red, unsigned green, unsigned blue,
449 unsigned transp, struct fb_info *info)
450 {
451 struct glamofb_handle *glamo = info->par;
452 unsigned int val;
453
454 switch (glamo->fb->fix.visual) {
455 case FB_VISUAL_TRUECOLOR:
456 case FB_VISUAL_DIRECTCOLOR:
457 /* true-colour, use pseuo-palette */
458
459 if (regno < 16) {
460 u32 *pal = glamo->fb->pseudo_palette;
461
462 val = chan_to_field(red, &glamo->fb->var.red);
463 val |= chan_to_field(green, &glamo->fb->var.green);
464 val |= chan_to_field(blue, &glamo->fb->var.blue);
465
466 pal[regno] = val;
467 };
468 break;
469 default:
470 return 1; /* unknown type */
471 }
472
473 return 0;
474 }
475
476 static int glamofb_ioctl(struct fb_info *info, unsigned int cmd,
477 unsigned long arg) {
478 struct glamofb_handle *gfb = (struct glamofb_handle*)info->par;
479 struct glamo_core *gcore = gfb->core;
480 int retval = -ENOTTY;
481
482 switch (cmd) {
483 case GLAMOFB_ENGINE_ENABLE:
484 retval = glamo_engine_enable(gcore, arg);
485 break;
486 case GLAMOFB_ENGINE_DISABLE:
487 retval = glamo_engine_disable(gcore, arg);
488 break;
489 case GLAMOFB_ENGINE_RESET:
490 glamo_engine_reset(gcore, arg);
491 retval = 0;
492 break;
493 default:
494 break;
495 }
496
497 return retval;
498 }
499
500
501 #ifdef CONFIG_MFD_GLAMO_HWACCEL
502 static inline void glamofb_vsync_wait(struct glamofb_handle *glamo,
503 int line, int size, int range)
504 {
505 int count[2];
506
507 do {
508 count[0] = reg_read(glamo, GLAMO_REG_LCD_STATUS2) & 0x3ff;
509 count[1] = reg_read(glamo, GLAMO_REG_LCD_STATUS2) & 0x3ff;
510 } while (count[0] != count[1] ||
511 (line < count[0] + range &&
512 size > count[0] - range) ||
513 count[0] < range * 2);
514 }
515
516 /*
517 * Enable/disable the hardware cursor mode altogether
518 * (for blinking and such, use glamofb_cursor()).
519 */
520 static void glamofb_cursor_onoff(struct glamofb_handle *glamo, int on)
521 {
522 int y, size;
523
524 if (glamo->cursor_on) {
525 y = reg_read(glamo, GLAMO_REG_LCD_CURSOR_Y_POS);
526 size = reg_read(glamo, GLAMO_REG_LCD_CURSOR_Y_SIZE);
527
528 glamofb_vsync_wait(glamo, y, size, 30);
529 }
530
531 reg_set_bit_mask(glamo, GLAMO_REG_LCD_MODE1,
532 GLAMO_LCD_MODE1_CURSOR_EN,
533 on ? GLAMO_LCD_MODE1_CURSOR_EN : 0);
534 glamo->cursor_on = on;
535
536 /* Hide the cursor by default */
537 reg_write(glamo, GLAMO_REG_LCD_CURSOR_X_SIZE, 0);
538 }
539
540 static int glamofb_cursor(struct fb_info *info, struct fb_cursor *cursor)
541 {
542 struct glamofb_handle *glamo = info->par;
543 unsigned long flags;
544
545 spin_lock_irqsave(&glamo->lock_cmd, flags);
546
547 reg_write(glamo, GLAMO_REG_LCD_CURSOR_X_SIZE,
548 cursor->enable ? cursor->image.width : 0);
549
550 if (cursor->set & FB_CUR_SETPOS) {
551 reg_write(glamo, GLAMO_REG_LCD_CURSOR_X_POS,
552 cursor->image.dx);
553 reg_write(glamo, GLAMO_REG_LCD_CURSOR_Y_POS,
554 cursor->image.dy);
555 }
556
557 if (cursor->set & FB_CUR_SETCMAP) {
558 uint16_t fg = glamo->pseudo_pal[cursor->image.fg_color];
559 uint16_t bg = glamo->pseudo_pal[cursor->image.bg_color];
560
561 reg_write(glamo, GLAMO_REG_LCD_CURSOR_FG_COLOR, fg);
562 reg_write(glamo, GLAMO_REG_LCD_CURSOR_BG_COLOR, bg);
563 reg_write(glamo, GLAMO_REG_LCD_CURSOR_DST_COLOR, fg);
564 }
565
566 if (cursor->set & FB_CUR_SETHOT)
567 reg_write(glamo, GLAMO_REG_LCD_CURSOR_PRESET,
568 (cursor->hot.x << 8) | cursor->hot.y);
569
570 if ((cursor->set & FB_CUR_SETSIZE) ||
571 (cursor->set & (FB_CUR_SETIMAGE | FB_CUR_SETSHAPE))) {
572 int x, y, pitch, op;
573 const uint8_t *pcol = cursor->image.data;
574 const uint8_t *pmsk = cursor->mask;
575 uint8_t __iomem *dst = glamo->cursor_addr;
576 uint8_t dcol = 0;
577 uint8_t dmsk = 0;
578 uint8_t byte = 0;
579
580 if (cursor->image.depth > 1) {
581 spin_unlock_irqrestore(&glamo->lock_cmd, flags);
582 return -EINVAL;
583 }
584
585 pitch = ((cursor->image.width + 7) >> 2) & ~1;
586 reg_write(glamo, GLAMO_REG_LCD_CURSOR_PITCH,
587 pitch);
588 reg_write(glamo, GLAMO_REG_LCD_CURSOR_Y_SIZE,
589 cursor->image.height);
590
591 for (y = 0; y < cursor->image.height; y++) {
592 byte = 0;
593 for (x = 0; x < cursor->image.width; x++) {
594 if ((x % 8) == 0) {
595 dcol = *pcol++;
596 dmsk = *pmsk++;
597 } else {
598 dcol >>= 1;
599 dmsk >>= 1;
600 }
601
602 if (cursor->rop == ROP_COPY)
603 op = (dmsk & 1) ?
604 (dcol & 1) ? 1 : 3 : 0;
605 else
606 op = ((dmsk & 1) << 1) |
607 ((dcol & 1) << 0);
608 byte |= op << ((x & 3) << 1);
609
610 if (x % 4 == 3) {
611 writeb(byte, dst + x / 4);
612 byte = 0;
613 }
614 }
615 if (x % 4) {
616 writeb(byte, dst + x / 4);
617 byte = 0;
618 }
619
620 dst += pitch;
621 }
622 }
623
624 spin_unlock_irqrestore(&glamo->lock_cmd, flags);
625
626 return 0;
627 }
628 #endif
629
630 static inline int glamofb_cmdq_empty(struct glamofb_handle *gfb)
631 {
632 /* DGCMdQempty -- 1 == command queue is empty */
633 return reg_read(gfb, GLAMO_REG_LCD_STATUS1) & (1 << 15);
634 }
635
636 /* call holding gfb->lock_cmd when locking, until you unlock */
637 int glamofb_cmd_mode(struct glamofb_handle *gfb, int on)
638 {
639 int timeout = 2000000;
640
641 dev_dbg(gfb->dev, "glamofb_cmd_mode(gfb=%p, on=%d)\n", gfb, on);
642 if (on) {
643 dev_dbg(gfb->dev, "%s: waiting for cmdq empty: ",
644 __func__);
645 while ((!glamofb_cmdq_empty(gfb)) && (timeout--))
646 cpu_relax();
647 if (timeout < 0) {
648 printk(KERN_ERR"*************"
649 "glamofb cmd_queue never got empty"
650 "*************\n");
651 return -EIO;
652 }
653 dev_dbg(gfb->dev, "empty!\n");
654
655 /* display the entire frame then switch to command */
656 reg_write(gfb, GLAMO_REG_LCD_COMMAND1,
657 GLAMO_LCD_CMD_TYPE_DISP |
658 GLAMO_LCD_CMD_DATA_FIRE_VSYNC);
659
660 /* wait until lcd idle */
661 dev_dbg(gfb->dev, "waiting for lcd idle: ");
662 timeout = 2000000;
663 while ((!reg_read(gfb, GLAMO_REG_LCD_STATUS2) & (1 << 12)) &&
664 (timeout--))
665 cpu_relax();
666 if (timeout < 0) {
667 printk(KERN_ERR"*************"
668 "glamofb lcd never idle"
669 "*************\n");
670 return -EIO;
671 }
672
673 mdelay(100);
674
675 dev_dbg(gfb->dev, "cmd mode entered\n");
676
677 } else {
678 /* RGB interface needs vsync/hsync */
679 if (reg_read(gfb, GLAMO_REG_LCD_MODE3) & GLAMO_LCD_MODE3_RGB)
680 reg_write(gfb, GLAMO_REG_LCD_COMMAND1,
681 GLAMO_LCD_CMD_TYPE_DISP |
682 GLAMO_LCD_CMD_DATA_DISP_SYNC);
683
684 reg_write(gfb, GLAMO_REG_LCD_COMMAND1,
685 GLAMO_LCD_CMD_TYPE_DISP |
686 GLAMO_LCD_CMD_DATA_DISP_FIRE);
687 }
688
689 return 0;
690 }
691 EXPORT_SYMBOL_GPL(glamofb_cmd_mode);
692
693
694 int glamofb_cmd_write(struct glamofb_handle *gfb, u_int16_t val)
695 {
696 int timeout = 200000;
697
698 dev_dbg(gfb->dev, "%s: waiting for cmdq empty\n", __func__);
699 while ((!glamofb_cmdq_empty(gfb)) && (timeout--))
700 yield();
701 if (timeout < 0) {
702 printk(KERN_ERR"*************"
703 "glamofb cmd_queue never got empty"
704 "*************\n");
705 return 1;
706 }
707 dev_dbg(gfb->dev, "idle, writing 0x%04x\n", val);
708
709 reg_write(gfb, GLAMO_REG_LCD_COMMAND1, val);
710
711 return 0;
712 }
713 EXPORT_SYMBOL_GPL(glamofb_cmd_write);
714
715 static struct fb_ops glamofb_ops = {
716 .owner = THIS_MODULE,
717 .fb_check_var = glamofb_check_var,
718 .fb_pan_display = glamofb_pan_display,
719 .fb_set_par = glamofb_set_par,
720 .fb_blank = glamofb_blank,
721 .fb_setcolreg = glamofb_setcolreg,
722 .fb_ioctl = glamofb_ioctl,
723 #ifdef CONFIG_MFD_GLAMO_HWACCEL
724 .fb_cursor = glamofb_cursor,
725 #endif
726 .fb_fillrect = cfb_fillrect,
727 .fb_copyarea = cfb_copyarea,
728 .fb_imageblit = cfb_imageblit,
729 };
730
731 static int glamofb_init_regs(struct glamofb_handle *glamo)
732 {
733 struct fb_info *info = glamo->fb;
734
735 glamofb_check_var(&info->var, info);
736 glamofb_run_script(glamo, glamo_regs, ARRAY_SIZE(glamo_regs));
737 glamofb_set_par(info);
738
739 return 0;
740 }
741
742 static int __init glamofb_probe(struct platform_device *pdev)
743 {
744 int rc = -EIO;
745 struct fb_info *fbinfo;
746 struct glamofb_handle *glamofb;
747 struct glamo_core *core = dev_get_drvdata(pdev->dev.parent);
748 struct glamo_fb_platform_data *mach_info;
749
750 printk(KERN_INFO "SMEDIA Glamo frame buffer driver (C) 2007 "
751 "Openmoko, Inc.\n");
752
753 if (!core->pdata || !core->pdata->fb_data)
754 return -ENOENT;
755
756
757 fbinfo = framebuffer_alloc(sizeof(struct glamofb_handle), &pdev->dev);
758 if (!fbinfo)
759 return -ENOMEM;
760
761
762 glamofb = fbinfo->par;
763 glamofb->fb = fbinfo;
764 glamofb->dev = &pdev->dev;
765
766 glamofb->blank_mode = FB_BLANK_POWERDOWN;
767
768 strcpy(fbinfo->fix.id, "SMedia Glamo");
769
770 glamofb->reg = platform_get_resource_byname(pdev, IORESOURCE_MEM,
771 "glamo-fb-regs");
772 if (!glamofb->reg) {
773 dev_err(&pdev->dev, "platform device with no registers?\n");
774 rc = -ENOENT;
775 goto out_free;
776 }
777
778 glamofb->fb_res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
779 "glamo-fb-mem");
780 if (!glamofb->fb_res) {
781 dev_err(&pdev->dev, "platform device with no memory ?\n");
782 rc = -ENOENT;
783 goto out_free;
784 }
785
786 glamofb->reg = request_mem_region(glamofb->reg->start,
787 resource_size(glamofb->reg), pdev->name);
788 if (!glamofb->reg) {
789 dev_err(&pdev->dev, "failed to request mmio region\n");
790 goto out_free;
791 }
792
793 glamofb->fb_res = request_mem_region(glamofb->fb_res->start,
794 resource_size(glamofb->fb_res),
795 pdev->name);
796 if (!glamofb->fb_res) {
797 dev_err(&pdev->dev, "failed to request vram region\n");
798 goto out_release_reg;
799 }
800
801 /* we want to remap only the registers required for this core
802 * driver. */
803 glamofb->base = ioremap_nocache(glamofb->reg->start, resource_size(glamofb->reg));
804 if (!glamofb->base) {
805 dev_err(&pdev->dev, "failed to ioremap() mmio memory\n");
806 goto out_release_fb;
807 }
808
809 fbinfo->fix.smem_start = (unsigned long) glamofb->fb_res->start;
810 fbinfo->fix.smem_len = (__u32) resource_size(glamofb->fb_res);
811
812 fbinfo->screen_base = ioremap(glamofb->fb_res->start,
813 resource_size(glamofb->fb_res));
814 if (!fbinfo->screen_base) {
815 dev_err(&pdev->dev, "failed to ioremap() vram memory\n");
816 goto out_release_fb;
817 }
818 glamofb->cursor_addr = fbinfo->screen_base + 0x12C000;
819
820 platform_set_drvdata(pdev, glamofb);
821
822 mach_info = core->pdata->fb_data;
823 glamofb->core = core;
824 glamofb->mach_info = mach_info;
825
826 fbinfo->fix.visual = FB_VISUAL_TRUECOLOR;
827 fbinfo->fix.type = FB_TYPE_PACKED_PIXELS;
828 fbinfo->fix.type_aux = 0;
829 fbinfo->fix.xpanstep = 0;
830 fbinfo->fix.ypanstep = 0;
831 fbinfo->fix.ywrapstep = 0;
832 fbinfo->fix.accel = FB_ACCEL_GLAMO;
833
834
835 fbinfo->fbops = &glamofb_ops;
836 fbinfo->flags = FBINFO_FLAG_DEFAULT;
837 fbinfo->pseudo_palette = &glamofb->pseudo_pal;
838
839 fbinfo->mode = mach_info->modes;
840 fb_videomode_to_var(&fbinfo->var, fbinfo->mode);
841 fbinfo->var.bits_per_pixel = 16;
842 fbinfo->var.nonstd = 0;
843 fbinfo->var.activate = FB_ACTIVATE_NOW;
844 fbinfo->var.height = mach_info->height;
845 fbinfo->var.width = mach_info->width;
846 fbinfo->var.accel_flags = 0;
847 fbinfo->var.vmode = FB_VMODE_NONINTERLACED;
848
849 glamo_engine_enable(core, GLAMO_ENGINE_LCD);
850 glamo_engine_reset(core, GLAMO_ENGINE_LCD);
851 glamofb->output_enabled = 1;
852 glamofb->mode_set = 1;
853
854 dev_info(&pdev->dev, "spin_lock_init\n");
855 spin_lock_init(&glamofb->lock_cmd);
856 glamofb_init_regs(glamofb);
857 #ifdef CONFIG_MFD_GLAMO_HWACCEL
858 glamofb_cursor_onoff(glamofb, 1);
859 #endif
860
861 fb_videomode_to_modelist(mach_info->modes, mach_info->num_modes,
862 &fbinfo->modelist);
863
864 rc = register_framebuffer(fbinfo);
865 if (rc < 0) {
866 dev_err(&pdev->dev, "failed to register framebuffer\n");
867 goto out_unmap_fb;
868 }
869
870 printk(KERN_INFO "fb%d: %s frame buffer device\n",
871 fbinfo->node, fbinfo->fix.id);
872
873 return 0;
874
875 out_unmap_fb:
876 iounmap(fbinfo->screen_base);
877 iounmap(glamofb->base);
878 out_release_fb:
879 release_mem_region(glamofb->fb_res->start, resource_size(glamofb->fb_res));
880 out_release_reg:
881 release_mem_region(glamofb->reg->start, resource_size(glamofb->reg));
882 out_free:
883 framebuffer_release(fbinfo);
884 return rc;
885 }
886
887 static int glamofb_remove(struct platform_device *pdev)
888 {
889 struct glamofb_handle *glamofb = platform_get_drvdata(pdev);
890
891 platform_set_drvdata(pdev, NULL);
892 iounmap(glamofb->base);
893 release_mem_region(glamofb->reg->start, resource_size(glamofb->reg));
894 kfree(glamofb);
895
896 return 0;
897 }
898
899 #ifdef CONFIG_PM
900
901 static int glamofb_suspend(struct device *dev)
902 {
903 struct glamofb_handle *gfb = dev_get_drvdata(dev);
904
905 acquire_console_sem();
906 fb_set_suspend(gfb->fb, 1);
907 release_console_sem();
908
909 /* seriously -- nobody is allowed to touch glamo memory when we
910 * are suspended or we lock on nWAIT
911 */
912 /* iounmap(gfb->fb->screen_base); */
913
914 return 0;
915 }
916
917 static int glamofb_resume(struct device *dev)
918 {
919 struct glamofb_handle *gfb = dev_get_drvdata(dev);
920
921 /* OK let's allow framebuffer ops again */
922 /* gfb->fb->screen_base = ioremap(gfb->fb_res->start,
923 resource_size(gfb->fb_res)); */
924 glamo_engine_enable(gfb->core, GLAMO_ENGINE_LCD);
925 glamo_engine_reset(gfb->core, GLAMO_ENGINE_LCD);
926
927 glamofb_init_regs(gfb);
928 #ifdef CONFIG_MFD_GLAMO_HWACCEL
929 glamofb_cursor_onoff(gfb, 1);
930 #endif
931
932 acquire_console_sem();
933 fb_set_suspend(gfb->fb, 0);
934 release_console_sem();
935
936 return 0;
937 }
938
939 static struct dev_pm_ops glamofb_pm_ops = {
940 .suspend = glamofb_suspend,
941 .resume = glamofb_resume,
942 };
943
944 #define GLAMOFB_PM_OPS (&glamofb_pm_ops)
945
946 #else
947 #define GLAMOFB_PM_OPS NULL
948 #endif
949
950 static struct platform_driver glamofb_driver = {
951 .probe = glamofb_probe,
952 .remove = glamofb_remove,
953 .driver = {
954 .name = "glamo-fb",
955 .owner = THIS_MODULE,
956 .pm = GLAMOFB_PM_OPS
957 },
958 };
959
960 static int __devinit glamofb_init(void)
961 {
962 return platform_driver_register(&glamofb_driver);
963 }
964
965 static void __exit glamofb_cleanup(void)
966 {
967 platform_driver_unregister(&glamofb_driver);
968 }
969
970 module_init(glamofb_init);
971 module_exit(glamofb_cleanup);
972
973 MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
974 MODULE_DESCRIPTION("Smedia Glamo 336x/337x framebuffer driver");
975 MODULE_LICENSE("GPL");
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