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Merge branch 'linux-3.19' of git://anongit.freedesktop.org/git/nouveau/linux-2.6...
[linux-2.6-block.git] / drivers / video / fbdev / au1100fb.c
CommitLineData
1da177e4
LT		 1/*
2 * BRIEF MODULE DESCRIPTION
3 * Au1100 LCD Driver.
4 *
3b495f2b
PP		 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 *
f77f50ca 10 * PM support added by Rodolfo Giometti <giometti@linux.it>
ca27ac4c 11 * Cursor enable/disable by Rodolfo Giometti <giometti@linux.it>
f77f50ca 12 *
1da177e4
LT		 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 */
6b1889c1 44#include <linux/clk.h>
1da177e4
LT		 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>
1da177e4
LT		 50#include <linux/fb.h>
51#include <linux/init.h>
3b495f2b
PP		 52#include <linux/interrupt.h>
53#include <linux/ctype.h>
54#include <linux/dma-mapping.h>
cacfc8cf 55#include <linux/platform_device.h>
5a0e3ad6 56#include <linux/slab.h>
1da177e4 57
3b495f2b 58#include <asm/mach-au1x00/au1000.h>
1da177e4 59
3b495f2b
PP		 60#define DEBUG 0
61
62#include "au1100fb.h"
1da177e4 63
3b495f2b
PP		 64#define DRIVER_NAME "au1100fb"
65#define DRIVER_DESC "LCD controller driver for AU1100 processors"
1da177e4 66
3b495f2b
PP		 67#define to_au1100fb_device(_info) \
68 (_info ? container_of(_info, struct au1100fb_device, info) : NULL);
1da177e4 69
3b495f2b
PP		 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 */
74struct 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 } },
1da177e4
LT		 85};
86
48c68c4f 87static struct fb_fix_screeninfo au1100fb_fix = {
3b495f2b
PP		 88 .id = "AU1100 FB",
89 .xpanstep = 1,
90 .ypanstep = 1,
91 .type = FB_TYPE_PACKED_PIXELS,
92 .accel = FB_ACCEL_NONE,
1da177e4
LT		 93};
94
48c68c4f 95static struct fb_var_screeninfo au1100fb_var = {
3b495f2b
PP		 96 .activate = FB_ACTIVATE_NOW,
97 .height = -1,
98 .width = -1,
99 .vmode = FB_VMODE_NONINTERLACED,
1da177e4
LT		 100};
101
8e92f21b
YY		 102/* fb_blank
103 * Blank the screen. Depending on the mode, the screen will be
104 * activated with the backlight color, or desactivated
105 */
106static 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:
88564dda
PB		 115 /* Turn on panel */
116 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
2f73bfbe 117 wmb(); /* drain writebuffer */
8e92f21b
YY		 118 break;
119
120 case VESA_VSYNC_SUSPEND:
121 case VESA_HSYNC_SUSPEND:
122 case VESA_POWERDOWN:
88564dda
PB		 123 /* Turn off panel */
124 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
2f73bfbe 125 wmb(); /* drain writebuffer */
8e92f21b
YY		 126 break;
127 default:
128 break;
129
130 }
131 return 0;
132}
133
3b495f2b
PP		 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
1da177e4 137 */
3b495f2b 138int au1100fb_setmode(struct au1100fb_device *fbdev)
1da177e4 139{
3b495f2b
PP		 140 struct fb_info *info = &fbdev->info;
141 u32 words;
142 int index;
1da177e4 143
3b495f2b
PP		 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 */
bb39e419 180 }
3b495f2b
PP		 181 } else {
182 /* mono */
183 info->fix.visual = FB_VISUAL_MONO10;
184 info->fix.line_length = info->var.xres_virtual / 8;
1da177e4
LT		 185 }
186
3b495f2b 187 info->screen_size = info->fix.line_length * info->var.yres_virtual;
fd2d5430
RG		 188 info->var.rotate = ((fbdev->panel->control_base&LCD_CONTROL_SM_MASK) \
189 >> LCD_CONTROL_SM_BIT) * 90;
1da177e4 190
3b495f2b 191 /* Determine BPP mode and format */
fd2d5430 192 fbdev->regs->lcd_control = fbdev->panel->control_base;
3b495f2b 193 fbdev->regs->lcd_horztiming = fbdev->panel->horztiming;
3b495f2b 194 fbdev->regs->lcd_verttiming = fbdev->panel->verttiming;
3b495f2b 195 fbdev->regs->lcd_clkcontrol = fbdev->panel->clkcontrol_base;
bb39e419
RG		 196 fbdev->regs->lcd_intenable = 0;
197 fbdev->regs->lcd_intstatus = 0;
3b495f2b
PP		 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 }
1da177e4 210 }
1da177e4 211
3b495f2b
PP		 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);
1da177e4 220
3b495f2b
PP		 221 fbdev->regs->lcd_pwmdiv = 0;
222 fbdev->regs->lcd_pwmhi = 0;
1da177e4 223
3b495f2b
PP		 224 /* Resume controller */
225 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
bb39e419
RG		 226 mdelay(10);
227 au1100fb_fb_blank(VESA_NO_BLANKING, info);
1da177e4 228
3b495f2b 229 return 0;
1da177e4
LT		 230}
231
3b495f2b
PP		 232/* fb_setcolreg
233 * Set color in LCD palette.
234 */
235int au1100fb_fb_setcolreg(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *fbi)
1da177e4 236{
c05b7f3d
RG		 237 struct au1100fb_device *fbdev;
238 u32 *palette;
3b495f2b 239 u32 value;
1da177e4 240
c05b7f3d
RG		 241 fbdev = to_au1100fb_device(fbi);
242 palette = fbdev->regs->lcd_pallettebase;
243
3b495f2b
PP		 244 if (regno > (AU1100_LCD_NBR_PALETTE_ENTRIES - 1))
245 return -EINVAL;
1da177e4 246
3b495f2b
PP		 247 if (fbi->var.grayscale) {
248 /* Convert color to grayscale */
249 red = green = blue =
250 (19595 * red + 38470 * green + 7471 * blue) >> 16;
251 }
1da177e4 252
3b495f2b
PP		 253 if (fbi->fix.visual == FB_VISUAL_TRUECOLOR) {
254 /* Place color in the pseudopalette */
255 if (regno > 16)
256 return -EINVAL;
1da177e4 257
3b495f2b
PP		 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;
1da177e4
LT		 284 }
285
3b495f2b
PP		 286 palette[regno] = value;
287
1da177e4
LT		 288 return 0;
289}
290
3b495f2b
PP		 291/* fb_pan_display
292 * Pan display in x and/or y as specified
293 */
294int au1100fb_fb_pan_display(struct fb_var_screeninfo *var, struct fb_info *fbi)
1da177e4 295{
c05b7f3d 296 struct au1100fb_device *fbdev;
3b495f2b
PP		 297 int dy;
298
c05b7f3d
RG		 299 fbdev = to_au1100fb_device(fbi);
300
3b495f2b
PP		 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_rotate
338 * Rotate the display of this angle. This doesn't seems to be used by the core,
339 * but as our hardware supports it, so why not implementing it...
340 */
341void au1100fb_fb_rotate(struct fb_info *fbi, int angle)
342{
343 struct au1100fb_device *fbdev = to_au1100fb_device(fbi);
344
345 print_dbg("fb_rotate %p %d", fbi, angle);
346
347 if (fbdev && (angle > 0) && !(angle % 90)) {
348
349 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
350
351 fbdev->regs->lcd_control &= ~(LCD_CONTROL_SM_MASK);
352 fbdev->regs->lcd_control |= ((angle/90) << LCD_CONTROL_SM_BIT);
353
354 fbdev->regs->lcd_control |= LCD_CONTROL_GO;
1da177e4
LT		 355 }
356}
357
3b495f2b
PP		 358/* fb_mmap
359 * Map video memory in user space. We don't use the generic fb_mmap method mainly
360 * to allow the use of the TLB streaming flag (CCA=6)
361 */
216d526c 362int au1100fb_fb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
1da177e4 363{
c05b7f3d 364 struct au1100fb_device *fbdev;
1da177e4 365
c05b7f3d
RG		 366 fbdev = to_au1100fb_device(fbi);
367
3b495f2b 368 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
1da177e4
LT		 369 pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6
370
7314e613 371 return vm_iomap_memory(vma, fbdev->fb_phys, fbdev->fb_len);
1da177e4
LT		 372}
373
3b495f2b 374static struct fb_ops au1100fb_ops =
1da177e4 375{
3b495f2b
PP		 376 .owner = THIS_MODULE,
377 .fb_setcolreg = au1100fb_fb_setcolreg,
378 .fb_blank = au1100fb_fb_blank,
379 .fb_pan_display = au1100fb_fb_pan_display,
380 .fb_fillrect = cfb_fillrect,
381 .fb_copyarea = cfb_copyarea,
382 .fb_imageblit = cfb_imageblit,
383 .fb_rotate = au1100fb_fb_rotate,
384 .fb_mmap = au1100fb_fb_mmap,
385};
1da177e4 386
1da177e4 387
3b495f2b 388/*-------------------------------------------------------------------------*/
1da177e4 389
d121c3f3
ML		 390static int au1100fb_setup(struct au1100fb_device *fbdev)
391{
392 char *this_opt, *options;
393 int num_panels = ARRAY_SIZE(known_lcd_panels);
394
395 if (num_panels <= 0) {
396 print_err("No LCD panels supported by driver!");
397 return -ENODEV;
398 }
399
400 if (fb_get_options(DRIVER_NAME, &options))
401 return -ENODEV;
402 if (!options)
403 return -ENODEV;
404
405 while ((this_opt = strsep(&options, ",")) != NULL) {
406 /* Panel option */
407 if (!strncmp(this_opt, "panel:", 6)) {
408 int i;
409 this_opt += 6;
410 for (i = 0; i < num_panels; i++) {
411 if (!strncmp(this_opt, known_lcd_panels[i].name,
412 strlen(this_opt))) {
413 fbdev->panel = &known_lcd_panels[i];
414 fbdev->panel_idx = i;
415 break;
416 }
417 }
418 if (i >= num_panels) {
419 print_warn("Panel '%s' not supported!", this_opt);
420 return -ENODEV;
421 }
422 }
423 /* Unsupported option */
424 else
425 print_warn("Unsupported option \"%s\"", this_opt);
426 }
427
428 print_info("Panel=%s", fbdev->panel->name);
429
430 return 0;
431}
1da177e4 432
48c68c4f 433static int au1100fb_drv_probe(struct platform_device *dev)
1da177e4 434{
3b495f2b
PP		 435 struct au1100fb_device *fbdev = NULL;
436 struct resource *regs_res;
437 unsigned long page;
6b1889c1 438 struct clk *c;
3b495f2b 439
3b495f2b 440 /* Allocate new device private */
1c16697b
JL		 441 fbdev = devm_kzalloc(&dev->dev, sizeof(struct au1100fb_device),
442 GFP_KERNEL);
d121c3f3 443 if (!fbdev) {
3b495f2b
PP		 444 print_err("fail to allocate device private record");
445 return -ENOMEM;
1da177e4
LT		 446 }
447
d121c3f3
ML		 448 if (au1100fb_setup(fbdev))
449 goto failed;
1da177e4 450
7a192ec3 451 platform_set_drvdata(dev, (void *)fbdev);
1da177e4 452
3b495f2b 453 /* Allocate region for our registers and map them */
d121c3f3
ML		 454 regs_res = platform_get_resource(dev, IORESOURCE_MEM, 0);
455 if (!regs_res) {
3b495f2b
PP		 456 print_err("fail to retrieve registers resource");
457 return -EFAULT;
458 }
1da177e4 459
3b495f2b 460 au1100fb_fix.mmio_start = regs_res->start;
28f65c11 461 au1100fb_fix.mmio_len = resource_size(regs_res);
1da177e4 462
93019734
ML		 463 if (!devm_request_mem_region(&dev->dev,
464 au1100fb_fix.mmio_start,
1c16697b
JL		 465 au1100fb_fix.mmio_len,
466 DRIVER_NAME)) {
c05b7f3d 467 print_err("fail to lock memory region at 0x%08lx",
3b495f2b
PP		 468 au1100fb_fix.mmio_start);
469 return -EBUSY;
470 }
1da177e4 471
3b495f2b 472 fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start);
1da177e4 473
3b495f2b
PP		 474 print_dbg("Register memory map at %p", fbdev->regs);
475 print_dbg("phys=0x%08x, size=%d", fbdev->regs_phys, fbdev->regs_len);
1da177e4 476
6b1889c1
ML		 477 c = clk_get(NULL, "lcd_intclk");
478 if (!IS_ERR(c)) {
479 fbdev->lcdclk = c;
480 clk_set_rate(c, 48000000);
481 clk_prepare_enable(c);
482 }
483
3b495f2b
PP		 484 /* Allocate the framebuffer to the maximum screen size * nbr of video buffers */
485 fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres *
486 (fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS;
487
93019734 488 fbdev->fb_mem = dmam_alloc_coherent(&dev->dev,
1c16697b
JL		 489 PAGE_ALIGN(fbdev->fb_len),
490 &fbdev->fb_phys, GFP_KERNEL);
3b495f2b
PP		 491 if (!fbdev->fb_mem) {
492 print_err("fail to allocate frambuffer (size: %dK))",
493 fbdev->fb_len / 1024);
1da177e4
LT		 494 return -ENOMEM;
495 }
3b495f2b
PP		 496
497 au1100fb_fix.smem_start = fbdev->fb_phys;
498 au1100fb_fix.smem_len = fbdev->fb_len;
1da177e4
LT		 499
500 /*
501 * Set page reserved so that mmap will work. This is necessary
502 * since we'll be remapping normal memory.
503 */
3b495f2b
PP		 504 for (page = (unsigned long)fbdev->fb_mem;
505 page < PAGE_ALIGN((unsigned long)fbdev->fb_mem + fbdev->fb_len);
1da177e4 506 page += PAGE_SIZE) {
cde0e2cc 507#ifdef CONFIG_DMA_NONCOHERENT
d121c3f3 508 SetPageReserved(virt_to_page(CAC_ADDR((void *)page)));
3b495f2b 509#else
1da177e4 510 SetPageReserved(virt_to_page(page));
3b495f2b 511#endif
1da177e4
LT		 512 }
513
3b495f2b
PP		 514 print_dbg("Framebuffer memory map at %p", fbdev->fb_mem);
515 print_dbg("phys=0x%08x, size=%dK", fbdev->fb_phys, fbdev->fb_len / 1024);
516
3b495f2b
PP		 517 /* load the panel info into the var struct */
518 au1100fb_var.bits_per_pixel = fbdev->panel->bpp;
519 au1100fb_var.xres = fbdev->panel->xres;
520 au1100fb_var.xres_virtual = au1100fb_var.xres;
521 au1100fb_var.yres = fbdev->panel->yres;
522 au1100fb_var.yres_virtual = au1100fb_var.yres;
523
524 fbdev->info.screen_base = fbdev->fb_mem;
525 fbdev->info.fbops = &au1100fb_ops;
526 fbdev->info.fix = au1100fb_fix;
527
1c16697b
JL		 528 fbdev->info.pseudo_palette =
529 devm_kzalloc(&dev->dev, sizeof(u32) * 16, GFP_KERNEL);
530 if (!fbdev->info.pseudo_palette)
3b495f2b 531 return -ENOMEM;
3b495f2b
PP		 532
533 if (fb_alloc_cmap(&fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, 0) < 0) {
534 print_err("Fail to allocate colormap (%d entries)",
535 AU1100_LCD_NBR_PALETTE_ENTRIES);
3b495f2b
PP		 536 return -EFAULT;
537 }
538
539 fbdev->info.var = au1100fb_var;
540
541 /* Set h/w registers */
542 au1100fb_setmode(fbdev);
543
544 /* Register new framebuffer */
545 if (register_framebuffer(&fbdev->info) < 0) {
546 print_err("cannot register new framebuffer");
547 goto failed;
548 }
549
550 return 0;
551
552failed:
6b1889c1
ML		 553 if (fbdev->lcdclk) {
554 clk_disable_unprepare(fbdev->lcdclk);
555 clk_put(fbdev->lcdclk);
556 }
3b495f2b 557 if (fbdev->fb_mem) {
d121c3f3
ML		 558 dma_free_noncoherent(&dev->dev, fbdev->fb_len, fbdev->fb_mem,
559 fbdev->fb_phys);
3b495f2b
PP		 560 }
561 if (fbdev->info.cmap.len != 0) {
562 fb_dealloc_cmap(&fbdev->info.cmap);
563 }
1da177e4 564
1c16697b 565 return -ENODEV;
1da177e4
LT		 566}
567
7a192ec3 568int au1100fb_drv_remove(struct platform_device *dev)
3b495f2b
PP		 569{
570 struct au1100fb_device *fbdev = NULL;
571
572 if (!dev)
573 return -ENODEV;
574
5a7bbe86 575 fbdev = platform_get_drvdata(dev);
3b495f2b
PP		 576
577#if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO)
578 au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
579#endif
580 fbdev->regs->lcd_control &= ~LCD_CONTROL_GO;
1da177e4 581
3b495f2b
PP		 582 /* Clean up all probe data */
583 unregister_framebuffer(&fbdev->info);
584
3b495f2b 585 fb_dealloc_cmap(&fbdev->info.cmap);
3b495f2b 586
6b1889c1
ML		 587 if (fbdev->lcdclk) {
588 clk_disable_unprepare(fbdev->lcdclk);
589 clk_put(fbdev->lcdclk);
590 }
591
3b495f2b
PP		 592 return 0;
593}
594
f77f50ca 595#ifdef CONFIG_PM
f77f50ca
RG		 596static struct au1100fb_regs fbregs;
597
7a192ec3 598int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state)
3b495f2b 599{
7a192ec3 600 struct au1100fb_device *fbdev = platform_get_drvdata(dev);
f77f50ca
RG		 601
602 if (!fbdev)
603 return 0;
604
f77f50ca
RG		 605 /* Blank the LCD */
606 au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info);
607
6b1889c1
ML		 608 if (fbdev->lcdclk)
609 clk_disable(fbdev->lcdclk);
f77f50ca
RG		 610
611 memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs));
612
3b495f2b
PP		 613 return 0;
614}
615
7a192ec3 616int au1100fb_drv_resume(struct platform_device *dev)
1da177e4 617{
7a192ec3 618 struct au1100fb_device *fbdev = platform_get_drvdata(dev);
f77f50ca
RG		 619
620 if (!fbdev)
621 return 0;
622
623 memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs));
624
6b1889c1
ML		 625 if (fbdev->lcdclk)
626 clk_enable(fbdev->lcdclk);
f77f50ca
RG		 627
628 /* Unblank the LCD */
629 au1100fb_fb_blank(VESA_NO_BLANKING, &fbdev->info);
630
3b495f2b 631 return 0;
1da177e4 632}
f77f50ca
RG		 633#else
634#define au1100fb_drv_suspend NULL
635#define au1100fb_drv_resume NULL
636#endif
1da177e4 637
7a192ec3
ML		 638static struct platform_driver au1100fb_driver = {
639 .driver = {
640 .name = "au1100-lcd",
7a192ec3 641 },
3b495f2b
PP		 642 .probe = au1100fb_drv_probe,
643 .remove = au1100fb_drv_remove,
644 .suspend = au1100fb_drv_suspend,
645 .resume = au1100fb_drv_resume,
646};
55be3108 647module_platform_driver(au1100fb_driver);
3b495f2b
PP		 648
649MODULE_DESCRIPTION(DRIVER_DESC);
650MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)