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, fbi: 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_palettebase; |
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 = to_au1100fb_device(fbi); |
344 | |
345 | vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot); |
346 | |
347 | pgprot_val(vma->vm_page_prot) |= (6 << 9); //CCA=6 |
348 | |
349 | return dma_mmap_coherent(fbdev->dev, vma, fbdev->fb_mem, fbdev->fb_phys, |
350 | fbdev->fb_len); |
351 | } |
352 | |
353 | static const struct fb_ops au1100fb_ops = { |
354 | .owner = THIS_MODULE, |
355 | __FB_DEFAULT_IOMEM_OPS_RDWR, |
356 | .fb_setcolreg = au1100fb_fb_setcolreg, |
357 | .fb_blank = au1100fb_fb_blank, |
358 | .fb_pan_display = au1100fb_fb_pan_display, |
359 | __FB_DEFAULT_IOMEM_OPS_DRAW, |
360 | .fb_mmap = au1100fb_fb_mmap, |
361 | }; |
362 | |
363 | |
364 | /*-------------------------------------------------------------------------*/ |
365 | |
366 | static int au1100fb_setup(struct au1100fb_device *fbdev) |
367 | { |
368 | char *this_opt, *options; |
369 | int num_panels = ARRAY_SIZE(known_lcd_panels); |
370 | |
371 | if (num_panels <= 0) { |
372 | print_err("No LCD panels supported by driver!" ); |
373 | return -ENODEV; |
374 | } |
375 | |
376 | if (fb_get_options(DRIVER_NAME, option: &options)) |
377 | return -ENODEV; |
378 | if (!options) |
379 | return -ENODEV; |
380 | |
381 | while ((this_opt = strsep(&options, "," )) != NULL) { |
382 | /* Panel option */ |
383 | if (!strncmp(this_opt, "panel:" , 6)) { |
384 | int i; |
385 | this_opt += 6; |
386 | for (i = 0; i < num_panels; i++) { |
387 | if (!strncmp(this_opt, known_lcd_panels[i].name, |
388 | strlen(this_opt))) { |
389 | fbdev->panel = &known_lcd_panels[i]; |
390 | fbdev->panel_idx = i; |
391 | break; |
392 | } |
393 | } |
394 | if (i >= num_panels) { |
395 | print_warn("Panel '%s' not supported!" , this_opt); |
396 | return -ENODEV; |
397 | } |
398 | } |
399 | /* Unsupported option */ |
400 | else |
401 | print_warn("Unsupported option \"%s\"" , this_opt); |
402 | } |
403 | |
404 | print_info("Panel=%s" , fbdev->panel->name); |
405 | |
406 | return 0; |
407 | } |
408 | |
409 | static int au1100fb_drv_probe(struct platform_device *dev) |
410 | { |
411 | struct au1100fb_device *fbdev; |
412 | struct resource *regs_res; |
413 | struct clk *c; |
414 | |
415 | /* Allocate new device private */ |
416 | fbdev = devm_kzalloc(dev: &dev->dev, size: sizeof(*fbdev), GFP_KERNEL); |
417 | if (!fbdev) |
418 | return -ENOMEM; |
419 | |
420 | if (au1100fb_setup(fbdev)) |
421 | goto failed; |
422 | |
423 | platform_set_drvdata(pdev: dev, data: (void *)fbdev); |
424 | fbdev->dev = &dev->dev; |
425 | |
426 | /* Allocate region for our registers and map them */ |
427 | regs_res = platform_get_resource(dev, IORESOURCE_MEM, 0); |
428 | if (!regs_res) { |
429 | print_err("fail to retrieve registers resource" ); |
430 | return -EFAULT; |
431 | } |
432 | |
433 | au1100fb_fix.mmio_start = regs_res->start; |
434 | au1100fb_fix.mmio_len = resource_size(res: regs_res); |
435 | |
436 | if (!devm_request_mem_region(&dev->dev, |
437 | au1100fb_fix.mmio_start, |
438 | au1100fb_fix.mmio_len, |
439 | DRIVER_NAME)) { |
440 | print_err("fail to lock memory region at 0x%08lx" , |
441 | au1100fb_fix.mmio_start); |
442 | return -EBUSY; |
443 | } |
444 | |
445 | fbdev->regs = (struct au1100fb_regs*)KSEG1ADDR(au1100fb_fix.mmio_start); |
446 | |
447 | print_dbg("Register memory map at %p" , fbdev->regs); |
448 | print_dbg("phys=0x%08x, size=%d" , fbdev->regs_phys, fbdev->regs_len); |
449 | |
450 | c = clk_get(NULL, id: "lcd_intclk" ); |
451 | if (!IS_ERR(ptr: c)) { |
452 | fbdev->lcdclk = c; |
453 | clk_set_rate(clk: c, rate: 48000000); |
454 | clk_prepare_enable(clk: c); |
455 | } |
456 | |
457 | /* Allocate the framebuffer to the maximum screen size * nbr of video buffers */ |
458 | fbdev->fb_len = fbdev->panel->xres * fbdev->panel->yres * |
459 | (fbdev->panel->bpp >> 3) * AU1100FB_NBR_VIDEO_BUFFERS; |
460 | |
461 | fbdev->fb_mem = dmam_alloc_coherent(dev: &dev->dev, |
462 | PAGE_ALIGN(fbdev->fb_len), |
463 | dma_handle: &fbdev->fb_phys, GFP_KERNEL); |
464 | if (!fbdev->fb_mem) { |
465 | print_err("fail to allocate framebuffer (size: %dK))" , |
466 | fbdev->fb_len / 1024); |
467 | return -ENOMEM; |
468 | } |
469 | |
470 | au1100fb_fix.smem_start = fbdev->fb_phys; |
471 | au1100fb_fix.smem_len = fbdev->fb_len; |
472 | |
473 | print_dbg("Framebuffer memory map at %p" , fbdev->fb_mem); |
474 | print_dbg("phys=0x%08x, size=%dK" , fbdev->fb_phys, fbdev->fb_len / 1024); |
475 | |
476 | /* load the panel info into the var struct */ |
477 | au1100fb_var.bits_per_pixel = fbdev->panel->bpp; |
478 | au1100fb_var.xres = fbdev->panel->xres; |
479 | au1100fb_var.xres_virtual = au1100fb_var.xres; |
480 | au1100fb_var.yres = fbdev->panel->yres; |
481 | au1100fb_var.yres_virtual = au1100fb_var.yres; |
482 | |
483 | fbdev->info.screen_base = fbdev->fb_mem; |
484 | fbdev->info.fbops = &au1100fb_ops; |
485 | fbdev->info.fix = au1100fb_fix; |
486 | |
487 | fbdev->info.pseudo_palette = |
488 | devm_kcalloc(dev: &dev->dev, n: 16, size: sizeof(u32), GFP_KERNEL); |
489 | if (!fbdev->info.pseudo_palette) |
490 | return -ENOMEM; |
491 | |
492 | if (fb_alloc_cmap(cmap: &fbdev->info.cmap, AU1100_LCD_NBR_PALETTE_ENTRIES, transp: 0) < 0) { |
493 | print_err("Fail to allocate colormap (%d entries)" , |
494 | AU1100_LCD_NBR_PALETTE_ENTRIES); |
495 | return -EFAULT; |
496 | } |
497 | |
498 | fbdev->info.var = au1100fb_var; |
499 | |
500 | /* Set h/w registers */ |
501 | au1100fb_setmode(fbdev); |
502 | |
503 | /* Register new framebuffer */ |
504 | if (register_framebuffer(fb_info: &fbdev->info) < 0) { |
505 | print_err("cannot register new framebuffer" ); |
506 | goto failed; |
507 | } |
508 | |
509 | return 0; |
510 | |
511 | failed: |
512 | if (fbdev->lcdclk) { |
513 | clk_disable_unprepare(clk: fbdev->lcdclk); |
514 | clk_put(clk: fbdev->lcdclk); |
515 | } |
516 | if (fbdev->info.cmap.len != 0) { |
517 | fb_dealloc_cmap(cmap: &fbdev->info.cmap); |
518 | } |
519 | |
520 | return -ENODEV; |
521 | } |
522 | |
523 | void au1100fb_drv_remove(struct platform_device *dev) |
524 | { |
525 | struct au1100fb_device *fbdev = NULL; |
526 | |
527 | fbdev = platform_get_drvdata(pdev: dev); |
528 | |
529 | #if !defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_LOGO) |
530 | au1100fb_fb_blank(VESA_POWERDOWN, &fbdev->info); |
531 | #endif |
532 | fbdev->regs->lcd_control &= ~LCD_CONTROL_GO; |
533 | |
534 | /* Clean up all probe data */ |
535 | unregister_framebuffer(fb_info: &fbdev->info); |
536 | |
537 | fb_dealloc_cmap(cmap: &fbdev->info.cmap); |
538 | |
539 | if (fbdev->lcdclk) { |
540 | clk_disable_unprepare(clk: fbdev->lcdclk); |
541 | clk_put(clk: fbdev->lcdclk); |
542 | } |
543 | } |
544 | |
545 | #ifdef CONFIG_PM |
546 | static struct au1100fb_regs fbregs; |
547 | |
548 | int au1100fb_drv_suspend(struct platform_device *dev, pm_message_t state) |
549 | { |
550 | struct au1100fb_device *fbdev = platform_get_drvdata(pdev: dev); |
551 | |
552 | if (!fbdev) |
553 | return 0; |
554 | |
555 | /* Blank the LCD */ |
556 | au1100fb_fb_blank(VESA_POWERDOWN, fbi: &fbdev->info); |
557 | |
558 | clk_disable(clk: fbdev->lcdclk); |
559 | |
560 | memcpy(&fbregs, fbdev->regs, sizeof(struct au1100fb_regs)); |
561 | |
562 | return 0; |
563 | } |
564 | |
565 | int au1100fb_drv_resume(struct platform_device *dev) |
566 | { |
567 | struct au1100fb_device *fbdev = platform_get_drvdata(pdev: dev); |
568 | |
569 | if (!fbdev) |
570 | return 0; |
571 | |
572 | memcpy(fbdev->regs, &fbregs, sizeof(struct au1100fb_regs)); |
573 | |
574 | clk_enable(clk: fbdev->lcdclk); |
575 | |
576 | /* Unblank the LCD */ |
577 | au1100fb_fb_blank(VESA_NO_BLANKING, fbi: &fbdev->info); |
578 | |
579 | return 0; |
580 | } |
581 | #else |
582 | #define au1100fb_drv_suspend NULL |
583 | #define au1100fb_drv_resume NULL |
584 | #endif |
585 | |
586 | static struct platform_driver au1100fb_driver = { |
587 | .driver = { |
588 | .name = "au1100-lcd" , |
589 | }, |
590 | .probe = au1100fb_drv_probe, |
591 | .remove_new = au1100fb_drv_remove, |
592 | .suspend = au1100fb_drv_suspend, |
593 | .resume = au1100fb_drv_resume, |
594 | }; |
595 | module_platform_driver(au1100fb_driver); |
596 | |
597 | MODULE_DESCRIPTION(DRIVER_DESC); |
598 | MODULE_LICENSE("GPL" ); |
599 | |