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Linux 4.18.10
[linux/fpc-iii.git] / drivers / video / fbdev / au1100fb.c
blob0adf0683cf081f8439935793ebd7ed24fa2cc8a3
1 /*
2 * BRIEF MODULE DESCRIPTION
3 * Au1100 LCD Driver.
4 *
5 * Rewritten for 2.6 by Embedded Alley Solutions
6 * <source@embeddedalley.com>, based on submissions by
7 * Karl Lessard <klessard@sunrisetelecom.com>
8 * <c.pellegrin@exadron.com>
9 *
10 * PM support added by Rodolfo Giometti <giometti@linux.it>
11 * Cursor enable/disable by Rodolfo Giometti <giometti@linux.it>
12 *
13 * Copyright 2002 MontaVista Software
14 * Author: MontaVista Software, Inc.
15 * ppopov@mvista.com or source@mvista.com
16 *
17 * Copyright 2002 Alchemy Semiconductor
18 * Author: Alchemy Semiconductor
19 *
20 * Based on:
21 * linux/drivers/video/skeletonfb.c -- Skeleton for a frame buffer device
22 * Created 28 Dec 1997 by Geert Uytterhoeven
23 *
24 * This program is free software; you can redistribute it and/or modify it
25 * under the terms of the GNU General Public License as published by the
26 * Free Software Foundation; either version 2 of the License, or (at your
27 * option) any later version.
28 *
29 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
30 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
31 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
32 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
33 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
34 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
35 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
36 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
38 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 * You should have received a copy of the GNU General Public License along
41 * with this program; if not, write to the Free Software Foundation, Inc.,
42 * 675 Mass Ave, Cambridge, MA 02139, USA.
43 */
44 #include <linux/clk.h>
45 #include <linux/module.h>
46 #include <linux/kernel.h>
47 #include <linux/errno.h>
48 #include <linux/string.h>
49 #include <linux/mm.h>
50 #include <linux/fb.h>
51 #include <linux/init.h>
52 #include <linux/interrupt.h>
53 #include <linux/ctype.h>
54 #include <linux/dma-mapping.h>
55 #include <linux/platform_device.h>
56 #include <linux/slab.h>
57
58 #include <asm/mach-au1x00/au1000.h>
59
60 #define DEBUG 0
61
62 #include "au1100fb.h"
63
64 #define DRIVER_NAME "au1100fb"
65 #define DRIVER_DESC "LCD controller driver for AU1100 processors"
66
67 #define to_au1100fb_device(_info) \
68 (_info ? container_of(_info, struct au1100fb_device, info) : NULL);
69
70 /* Bitfields format supported by the controller. Note that the order of formats
71 * SHOULD be the same as in the LCD_CONTROL_SBPPF field, so we can retrieve the
72 * right pixel format by doing rgb_bitfields[LCD_CONTROL_SBPPF_XXX >> LCD_CONTROL_SBPPF]
73 */
74 struct fb_bitfield rgb_bitfields[][4] =
75 {
76 /* Red, Green, Blue, Transp */
77 { { 10, 6, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
78 { { 11, 5, 0 }, { 5, 6, 0 }, { 0, 5, 0 }, { 0, 0, 0 } },
79 { { 11, 5, 0 }, { 6, 5, 0 }, { 0, 6, 0 }, { 0, 0, 0 } },
80 { { 10, 5, 0 }, { 5, 5, 0 }, { 0, 5, 0 }, { 15, 1, 0 } },
81 { { 11, 5, 0 }, { 6, 5, 0 }, { 1, 5, 0 }, { 0, 1, 0 } },
82
83 /* The last is used to describe 12bpp format */
84 { { 8, 4, 0 }, { 4, 4, 0 }, { 0, 4, 0 }, { 0, 0, 0 } },
85 };
86
87 static struct fb_fix_screeninfo au1100fb_fix = {
88 .id = "AU1100 FB",
89 .xpanstep = 1,
90 .ypanstep = 1,
91 .type = FB_TYPE_PACKED_PIXELS,
92 .accel = FB_ACCEL_NONE,
93 };
94
95 static struct fb_var_screeninfo au1100fb_var = {
96 .activate = FB_ACTIVATE_NOW,
97 .height = -1,
98 .width = -1,
99 .vmode = FB_VMODE_NONINTERLACED,
100 };
101
102 /* fb_blank
103 * Blank the screen. Depending on the mode, the screen will be
104 * activated with the backlight color, or desactivated
105 */
106 static int au1100fb_fb_blank(int blank_mode, struct fb_info *fbi)
107 {
108 struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
109
110 print_dbg("fb_blank %d %p", blank_mode, fbi);
111
112 switch (blank_mode) {
113
114 case VESA_NO_BLANKING:
115 /* Turn on panel */
116 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
117 wmb(); /* drain writebuffer */
118 break;
119
120 case VESA_VSYNC_SUSPEND:
121 case VESA_HSYNC_SUSPEND:
122 case VESA_POWERDOWN:
123 /* Turn off panel */
124 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
125 wmb(); /* drain writebuffer */
126 break;
127 default:
128 break;
129
130 }
131 return 0;
132 }
133
134 /*
135 * Set hardware with var settings. This will enable the controller with a specific
136 * mode, normally validated with the fb_check_var method
137 */
138 int au1100fb_setmode(struct au1100fb_device *fbdev)
139 {
140 struct fb_info *info = &fbdev->info;
141 u32 words;
142 int index;
143
144 if (!fbdev)
145 return -EINVAL;
146
147 /* Update var-dependent FB info */
148 if (panel_is_active(fbdev->panel) || panel_is_color(fbdev->panel)) {
149 if (info->var.bits_per_pixel <= 8) {
150 /* palettized */
151 info->var.red.offset = 0;
152 info->var.red.length = info->var.bits_per_pixel;
153 info->var.red.msb_right = 0;
154
155 info->var.green.offset = 0;
156 info->var.green.length = info->var.bits_per_pixel;
157 info->var.green.msb_right = 0;
158
159 info->var.blue.offset = 0;
160 info->var.blue.length = info->var.bits_per_pixel;
161 info->var.blue.msb_right = 0;
162
163 info->var.transp.offset = 0;
164 info->var.transp.length = 0;
165 info->var.transp.msb_right = 0;
166
167 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
168 info->fix.line_length = info->var.xres_virtual /
169 (8/info->var.bits_per_pixel);
170 } else {
171 /* non-palettized */
172 index = (fbdev->panel->control_base & LCD_CONTROL_SBPPF_MASK) >> LCD_CONTROL_SBPPF_BIT;
173 info->var.red = rgb_bitfields[index][0];
174 info->var.green = rgb_bitfields[index][1];
175 info->var.blue = rgb_bitfields[index][2];
176 info->var.transp = rgb_bitfields[index][3];
177
178 info->fix.visual = FB_VISUAL_TRUECOLOR;
179 info->fix.line_length = info->var.xres_virtual << 1; /* depth=16 */
180 }
181 } else {
182 /* mono */
183 info->fix.visual = FB_VISUAL_MONO10;
184 info->fix.line_length = info->var.xres_virtual / 8;
185 }
186
187 info->screen_size = info->fix.line_length * info->var.yres_virtual;
188 info->var.rotate = ((fbdev->panel->control_base&LCD_CONTROL_SM_MASK) \
189 >> LCD_CONTROL_SM_BIT) * 90;
190
191 /* Determine BPP mode and format */
192 fbdev->regs->lcd_control = fbdev->panel->control_base;
193 fbdev->regs->lcd_horztiming = fbdev->panel->horztiming;
194 fbdev->regs->lcd_verttiming = fbdev->panel->verttiming;
195 fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base;
196 fbdev->regs->lcd_intenable = 0;
197 fbdev->regs->lcd_intstatus = 0;
198 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(fbdev->fb_phys);
199
200 if (panel_is_dual(fbdev->panel)) {
201 /* Second panel display seconf half of screen if possible,
202 * otherwise display the same as the first panel */
203 if (info->var.yres_virtual >= (info->var.yres << 1)) {
204 fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys +
205 (info->fix.line_length *
206 (info->var.yres_virtual >> 1)));
207 } else {
208 fbdev->regs->lcd_dmaaddr1 = LCD_DMA_SA_N(fbdev->fb_phys);
209 }
210 }
211
212 words = info->fix.line_length / sizeof(u32);
213 if (!info->var.rotate || (info->var.rotate == 180)) {
214 words *= info->var.yres_virtual;
215 if (info->var.rotate /* 180 */) {
216 words -= (words % 8); /* should be divisable by 8 */
217 }
218 }
219 fbdev->regs->lcd_words = LCD_WRD_WRDS_N(words);
220
221 fbdev->regs->lcd_pwmdiv = 0;
222 fbdev->regs->lcd_pwmhi = 0;
223
224 /* Resume controller */
225 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
226 mdelay(10);
227 au1100fb_fb_blank(VESA_NO_BLANKING, info);
228
229 return 0;
230 }
231
232 /* fb_setcolreg
233 * Set color in LCD palette.
234 */
235 int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi)
236 {
237 struct au1100fb_device *fbdev;
238 u32 *palette;
239 u32 value;
240
241 fbdev = to_au1100fb_device(fbi);
242 palette = fbdev->regs->lcd_pallettebase;
243
244 if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1))
245 return -EINVAL;
246
247 if (fbi->var.grayscale) {
248 /* Convert color to grayscale */
249 red = green = blue =
250 (19595 * red + 38470 * green + 7471 * blue) >> 16;
251 }
252
253 if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) {
254 /* Place color in the pseudopalette */
255 if (regno > 16)
256 return -EINVAL;
257
258 palette = (u32*)fbi->pseudo_palette;
259
260 red >>= (16 - fbi->var.red.length);
261 green >>= (16 - fbi->var.green.length);
262 blue >>= (16 - fbi->var.blue.length);
263
264 value = (red << fbi->var.red.offset) |
265 (green << fbi->var.green.offset)|
266 (blue << fbi->var.blue.offset);
267 value &= 0xFFFF;
268
269 } else if (panel_is_active(fbdev->panel)) {
270 /* COLOR TFT PALLETTIZED (use RGB 565) */
271 value = (red & 0xF800)|((green >> 5) & 0x07E0)|((blue >> 11) & 0x001F);
272 value &= 0xFFFF;
273
274 } else if (panel_is_color(fbdev->panel)) {
275 /* COLOR STN MODE */
276 value = (((panel_swap_rgb(fbdev->panel) ? blue : red) >> 12) & 0x000F) |
277 ((green >> 8) & 0x00F0) |
278 (((panel_swap_rgb(fbdev->panel) ? red : blue) >> 4) & 0x0F00);
279 value &= 0xFFF;
280 } else {
281 /* MONOCHROME MODE */
282 value = (green >> 12) & 0x000F;
283 value &= 0xF;
284 }
285
286 palette[regno] = value;
287
288 return 0;
289 }
290
291 /* fb_pan_display
292 * Pan display in x and/or y as specified
293 */
294 int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi)
295 {
296 struct au1100fb_device *fbdev;
297 int dy;
298
299 fbdev = to_au1100fb_device(fbi);
300
301 print_dbg("fb_pan_display %p %p", var, fbi);
302
303 if (!var || !fbdev) {
304 return -EINVAL;
305 }
306
307 if (var->xoffset - fbi->var.xoffset) {
308 /* No support for X panning for now! */
309 return -EINVAL;
310 }
311
312 print_dbg("fb_pan_display 2 %p %p", var, fbi);
313 dy = var->yoffset - fbi->var.yoffset;
314 if (dy) {
315
316 u32 dmaaddr;
317
318 print_dbg("Panning screen of %d lines", dy);
319
320 dmaaddr = fbdev->regs->lcd_dmaaddr0;
321 dmaaddr += (fbi->fix.line_length * dy);
322
323 /* TODO: Wait for current frame to finished */
324 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
325
326 if (panel_is_dual(fbdev->panel)) {
327 dmaaddr = fbdev->regs->lcd_dmaaddr1;
328 dmaaddr += (fbi->fix.line_length * dy);
329 fbdev->regs->lcd_dmaaddr0 = LCD_DMA_SA_N(dmaaddr);
330 }
331 }
332 print_dbg("fb_pan_display 3 %p %p", var, fbi);
333
334 return 0;
335 }
336
337 /* fb_mmap
338 * Map video memory in user space. We don't use the generic fb_mmap method mainly
339 * to allow the use of the TLB streaming flag (CCA=6)
340 */
341 int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
342 {
343 struct au1100fb_device *fbdev;
344
345 fbdev = to_au1100fb_device(fbi);
346
347 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
348 pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
349
350 return vm_iomap_memory(vma, fbdev->fb_phys, fbdev->fb_len);
351 }
352
353 static struct fb_ops au1100fb_ops =
354 {
355 .owner = THIS_MODULE,
356 .fb_setcolreg = au1100fb_fb_setcolreg,
357 .fb_blank = au1100fb_fb_blank,
358 .fb_pan_display = au1100fb_fb_pan_display,
359 .fb_fillrect = cfb_fillrect,
360 .fb_copyarea = cfb_copyarea,
361 .fb_imageblit = cfb_imageblit,
362 .fb_mmap = au1100fb_fb_mmap,
363 };
364
365
366 /*-------------------------------------------------------------------------*/
367
368 static int au1100fb_setup(struct au1100fb_device *fbdev)
369 {
370 char *this_opt, *options;
371 int num_panels = ARRAY_SIZE(known_lcd_panels);
372
373 if (num_panels <= 0) {
374 print_err("No LCD panels supported by driver!");
375 return -ENODEV;
376 }
377
378 if (fb_get_options(DRIVER_NAME, &options))
379 return -ENODEV;
380 if (!options)
381 return -ENODEV;
382
383 while ((this_opt = strsep(&options, ",")) != NULL) {
384 /* Panel option */
385 if (!strncmp(this_opt, "panel:", 6)) {
386 int i;
387 this_opt += 6;
388 for (i = 0; i < num_panels; i++) {
389 if (!strncmp(this_opt, known_lcd_panels[i].name,
390 strlen(this_opt))) {
391 fbdev->panel = &known_lcd_panels[i];
392 fbdev->panel_idx = i;
393 break;
394 }
395 }
396 if (i >= num_panels) {
397 print_warn("Panel '%s' not supported!", this_opt);
398 return -ENODEV;
399 }
400 }
401 /* Unsupported option */
402 else
403 print_warn("Unsupported option \"%s\"", this_opt);
404 }
405
406 print_info("Panel=%s", fbdev->panel->name);
407
408 return 0;
409 }
410
411 static int au1100fb_drv_probe(struct platform_device *dev)
412 {
413 struct au1100fb_device *fbdev;
414 struct resource *regs_res;
415 unsigned long page;
416 struct clk *c;
417
418 /* Allocate new device private */
419 fbdev = devm_kzalloc(&dev->dev, sizeof(*fbdev), GFP_KERNEL);
420 if (!fbdev)
421 return -ENOMEM;
422
423 if (au1100fb_setup(fbdev))
424 goto failed;
425
426 platform_set_drvdata(dev, (void *)fbdev);
427
428 /* Allocate region for our registers and map them */
429 regs_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
430 if (!regs_res) {
431 print_err("fail to retrieve registers resource");
432 return -EFAULT;
433 }
434
435 au1100fb_fix.mmio_start = regs_res->start;
436 au1100fb_fix.mmio_len = resource_size(regs_res);
437
438 if (!devm_request_mem_region(&dev->dev,
439 au1100fb_fix.mmio_start,
440 au1100fb_fix.mmio_len,
441 DRIVER_NAME)) {
442 print_err("fail to lock memory region at 0x%08lx",
443 au1100fb_fix.mmio_start);
444 return -EBUSY;
445 }
446
447 fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start);
448
449 print_dbg("Register memory map at %p", fbdev->regs);
450 print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);
451
452 c = clk_get(NULL, "lcd_intclk");
453 if (!IS_ERR(c)) {
454 fbdev->lcdclk = c;
455 clk_set_rate(c, 48000000);
456 clk_prepare_enable(c);
457 }
458
459 /* Allocate the framebuffer to the maximum screen size * nbr of video buffers */
460 fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres *
461 (fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS;
462
463 fbdev->fb_mem = dmam_alloc_coherent(&dev->dev,
464 PAGE_ALIGN(fbdev->fb_len),
465 &fbdev->fb_phys, GFP_KERNEL);
466 if (!fbdev->fb_mem) {
467 print_err("fail to allocate framebuffer (size: %dK))",
468 fbdev->fb_len / 1024);
469 return -ENOMEM;
470 }
471
472 au1100fb_fix.smem_start = fbdev->fb_phys;
473 au1100fb_fix.smem_len = fbdev->fb_len;
474
475 /*
476 * Set page reserved so that mmap will work. This is necessary
477 * since we'll be remapping normal memory.
478 */
479 for (page = (unsigned long)fbdev->fb_mem;
480 page < PAGE_ALIGN((unsigned long)fbdev->fb_mem + fbdev->fb_len);
481 page += PAGE_SIZE) {
482 #ifdef CONFIG_DMA_NONCOHERENT
483 SetPageReserved(virt_to_page(CAC_ADDR((void *)page)));
484 #else
485 SetPageReserved(virt_to_page(page));
486 #endif
487 }
488
489 print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
490 print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
491
492 /* load the panel info into the var struct */
493 au1100fb_var.bits_per_pixel = fbdev->panel->bpp;
494 au1100fb_var.xres = fbdev->panel->xres;
495 au1100fb_var.xres_virtual = au1100fb_var.xres;
496 au1100fb_var.yres = fbdev->panel->yres;
497 au1100fb_var.yres_virtual = au1100fb_var.yres;
498
499 fbdev->info.screen_base = fbdev->fb_mem;
500 fbdev->info.fbops = &au1100fb_ops;
501 fbdev->info.fix = au1100fb_fix;
502
503 fbdev->info.pseudo_palette =
504 devm_kcalloc(&dev->dev, 16, sizeof(u32), GFP_KERNEL);
505 if (!fbdev->info.pseudo_palette)
506 return -ENOMEM;
507
508 if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
509 print_err("Fail to allocate colormap (%d entries)",
510 AU1100_LCD_NBR_PALETTE_ENTRIES);
511 return -EFAULT;
512 }
513
514 fbdev->info.var = au1100fb_var;
515
516 /* Set h/w registers */
517 au1100fb_setmode(fbdev);
518
519 /* Register new framebuffer */
520 if (register_framebuffer(&fbdev->info) < 0) {
521 print_err("cannot register new framebuffer");
522 goto failed;
523 }
524
525 return 0;
526
527 failed:
528 if (fbdev->lcdclk) {
529 clk_disable_unprepare(fbdev->lcdclk);
530 clk_put(fbdev->lcdclk);
531 }
532 if (fbdev->info.cmap.len != 0) {
533 fb_dealloc_cmap(&fbdev->info.cmap);
534 }
535
536 return -ENODEV;
537 }
538
539 int au1100fb_drv_remove(struct platform_device *dev)
540 {
541 struct au1100fb_device *fbdev = NULL;
542
543 if (!dev)
544 return -ENODEV;
545
546 fbdev = platform_get_drvdata(dev);
547
548 #if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
549 au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
550 #endif
551 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
552
553 /* Clean up all probe data */
554 unregister_framebuffer(&fbdev->info);
555
556 fb_dealloc_cmap(&fbdev->info.cmap);
557
558 if (fbdev->lcdclk) {
559 clk_disable_unprepare(fbdev->lcdclk);
560 clk_put(fbdev->lcdclk);
561 }
562
563 return 0;
564 }
565
566 #ifdef CONFIG_PM
567 static struct au1100fb_regs fbregs;
568
569 int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state)
570 {
571 struct au1100fb_device *fbdev = platform_get_drvdata(dev);
572
573 if (!fbdev)
574 return 0;
575
576 /* Blank the LCD */
577 au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
578
579 if (fbdev->lcdclk)
580 clk_disable(fbdev->lcdclk);
581
582 memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs));
583
584 return 0;
585 }
586
587 int au1100fb_drv_resume(struct platform_device *dev)
588 {
589 struct au1100fb_device *fbdev = platform_get_drvdata(dev);
590
591 if (!fbdev)
592 return 0;
593
594 memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));
595
596 if (fbdev->lcdclk)
597 clk_enable(fbdev->lcdclk);
598
599 /* Unblank the LCD */
600 au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);
601
602 return 0;
603 }
604 #else
605 #define au1100fb_drv_suspend NULL
606 #define au1100fb_drv_resume NULL
607 #endif
608
609 static struct platform_driver au1100fb_driver = {
610 .driver = {
611 .name = "au1100-lcd",
612 },
613 .probe = au1100fb_drv_probe,
614 .remove = au1100fb_drv_remove,
615 .suspend = au1100fb_drv_suspend,
616 .resume = au1100fb_drv_resume,
617 };
618 module_platform_driver(au1100fb_driver);
619
620 MODULE_DESCRIPTION(DRIVER_DESC);
621 MODULE_LICENSE("GPL");
Linux with added FPC-III support