19 #include <linux/fb.h>
33 #define to_clcd(info)	container_of(info, struct clcd_fb, fb)
36 static const char *clcd_name = "CLCD FB";
51 static inline void clcdfb_set_start(struct clcd_fb *fb)  in clcdfb_set_start()  argument
53 	unsigned long ustart = fb->fb.fix.smem_start;  in clcdfb_set_start()
56 	ustart += fb->fb.var.yoffset * fb->fb.fix.line_length;  in clcdfb_set_start()
57 	lstart = ustart + fb->fb.var.yres * fb->fb.fix.line_length / 2;  in clcdfb_set_start()
59 	writel(ustart, fb->regs + CLCD_UBAS);  in clcdfb_set_start()
60 	writel(lstart, fb->regs + CLCD_LBAS);  in clcdfb_set_start()
63 static void clcdfb_disable(struct clcd_fb *fb)  in clcdfb_disable()  argument
67 	if (fb->board->disable)  in clcdfb_disable()
68 		fb->board->disable(fb);  in clcdfb_disable()
70 	if (fb->panel->backlight) {  in clcdfb_disable()
71 		fb->panel->backlight->props.power = FB_BLANK_POWERDOWN;  in clcdfb_disable()
72 		backlight_update_status(fb->panel->backlight);  in clcdfb_disable()
75 	val = readl(fb->regs + fb->off_cntl);  in clcdfb_disable()
78 		writel(val, fb->regs + fb->off_cntl);  in clcdfb_disable()
84 		writel(val, fb->regs + fb->off_cntl);  in clcdfb_disable()
90 	if (fb->clk_enabled) {  in clcdfb_disable()
91 		fb->clk_enabled = false;  in clcdfb_disable()
92 		clk_disable(fb->clk);  in clcdfb_disable()
96 static void clcdfb_enable(struct clcd_fb *fb, u32 cntl)  in clcdfb_enable()  argument
101 	if (!fb->clk_enabled) {  in clcdfb_enable()
102 		fb->clk_enabled = true;  in clcdfb_enable()
103 		clk_enable(fb->clk);  in clcdfb_enable()
110 	writel(cntl, fb->regs + fb->off_cntl);  in clcdfb_enable()
118 	writel(cntl, fb->regs + fb->off_cntl);  in clcdfb_enable()
123 	if (fb->panel->backlight) {  in clcdfb_enable()
124 		fb->panel->backlight->props.power = FB_BLANK_UNBLANK;  in clcdfb_enable()
125 		backlight_update_status(fb->panel->backlight);  in clcdfb_enable()
131 	if (fb->board->enable)  in clcdfb_enable()
132 		fb->board->enable(fb);  in clcdfb_enable()
136 clcdfb_set_bitfields(struct clcd_fb *fb, struct fb_var_screeninfo *var)  in clcdfb_set_bitfields()  argument
141 	if (fb->panel->caps && fb->board->caps)  in clcdfb_set_bitfields()
142 		caps = fb->panel->caps & fb->board->caps;  in clcdfb_set_bitfields()
145 		caps = fb->panel->cntl & CNTL_BGR ?  in clcdfb_set_bitfields()
152 	if (!(fb->panel->cntl & CNTL_LCDTFT))  in clcdfb_set_bitfields()
275 	struct clcd_fb *fb = to_clcd(info);  in clcdfb_check_var()  local
278 	if (fb->board->check)  in clcdfb_check_var()
279 		ret = fb->board->check(fb, var);  in clcdfb_check_var()
283 	    var->yres_virtual > fb->fb.fix.smem_len)  in clcdfb_check_var()
287 		ret = clcdfb_set_bitfields(fb, var);  in clcdfb_check_var()
294 	struct clcd_fb *fb = to_clcd(info);  in clcdfb_set_par()  local
297 	fb->fb.fix.line_length = fb->fb.var.xres_virtual *  in clcdfb_set_par()
298 				 fb->fb.var.bits_per_pixel / 8;  in clcdfb_set_par()
300 	if (fb->fb.var.bits_per_pixel <= 8)  in clcdfb_set_par()
301 		fb->fb.fix.visual = FB_VISUAL_PSEUDOCOLOR;  in clcdfb_set_par()
303 		fb->fb.fix.visual = FB_VISUAL_TRUECOLOR;  in clcdfb_set_par()
305 	fb->board->decode(fb, &regs);  in clcdfb_set_par()
307 	clcdfb_disable(fb);  in clcdfb_set_par()
309 	writel(regs.tim0, fb->regs + CLCD_TIM0);  in clcdfb_set_par()
310 	writel(regs.tim1, fb->regs + CLCD_TIM1);  in clcdfb_set_par()
311 	writel(regs.tim2, fb->regs + CLCD_TIM2);  in clcdfb_set_par()
312 	writel(regs.tim3, fb->regs + CLCD_TIM3);  in clcdfb_set_par()
314 	clcdfb_set_start(fb);  in clcdfb_set_par()
316 	clk_set_rate(fb->clk, (1000000000 / regs.pixclock) * 1000);  in clcdfb_set_par()
318 	fb->clcd_cntl = regs.cntl;  in clcdfb_set_par()
320 	clcdfb_enable(fb, regs.cntl);  in clcdfb_set_par()
327 		readl(fb->regs + CLCD_TIM0), readl(fb->regs + CLCD_TIM1),  in clcdfb_set_par()
328 		readl(fb->regs + CLCD_TIM2), readl(fb->regs + CLCD_TIM3),  in clcdfb_set_par()
329 		readl(fb->regs + CLCD_UBAS), readl(fb->regs + CLCD_LBAS),  in clcdfb_set_par()
330 		readl(fb->regs + fb->off_ienb), readl(fb->regs + fb->off_cntl));  in clcdfb_set_par()
351 	struct clcd_fb *fb = to_clcd(info);  in clcdfb_setcolreg()  local
354 		fb->cmap[regno] = convert_bitfield(transp, &fb->fb.var.transp) |  in clcdfb_setcolreg()
355 				  convert_bitfield(blue, &fb->fb.var.blue) |  in clcdfb_setcolreg()
356 				  convert_bitfield(green, &fb->fb.var.green) |  in clcdfb_setcolreg()
357 				  convert_bitfield(red, &fb->fb.var.red);  in clcdfb_setcolreg()
359 	if (fb->fb.fix.visual == FB_VISUAL_PSEUDOCOLOR && regno < 256) {  in clcdfb_setcolreg()
371 		if (fb->clcd_cntl & CNTL_BEBO)  in clcdfb_setcolreg()
381 		val = readl(fb->regs + hw_reg) & mask;  in clcdfb_setcolreg()
382 		writel(val | newval, fb->regs + hw_reg);  in clcdfb_setcolreg()
400 	struct clcd_fb *fb = to_clcd(info);  in clcdfb_blank()  local
403 		clcdfb_disable(fb);  in clcdfb_blank()
405 		clcdfb_enable(fb, fb->clcd_cntl);  in clcdfb_blank()
413 	struct clcd_fb *fb = to_clcd(info);  in clcdfb_mmap()  local
420 	    fb->board->mmap)  in clcdfb_mmap()
421 		ret = fb->board->mmap(fb, vma);  in clcdfb_mmap()
438 static int clcdfb_register(struct clcd_fb *fb)  in clcdfb_register()  argument
446 	if (amba_manf(fb->dev) == 0x41 && amba_part(fb->dev) == 0x111) {  in clcdfb_register()
447 		fb->off_ienb = CLCD_PL111_IENB;  in clcdfb_register()
448 		fb->off_cntl = CLCD_PL111_CNTL;  in clcdfb_register()
450 		fb->off_ienb = CLCD_PL110_IENB;  in clcdfb_register()
451 		fb->off_cntl = CLCD_PL110_CNTL;  in clcdfb_register()
454 	fb->clk = clk_get(&fb->dev->dev, NULL);  in clcdfb_register()
455 	if (IS_ERR(fb->clk)) {  in clcdfb_register()
456 		ret = PTR_ERR(fb->clk);  in clcdfb_register()
460 	ret = clk_prepare(fb->clk);  in clcdfb_register()
464 	fb->fb.device		= &fb->dev->dev;  in clcdfb_register()
466 	fb->fb.fix.mmio_start	= fb->dev->res.start;  in clcdfb_register()
467 	fb->fb.fix.mmio_len	= resource_size(&fb->dev->res);  in clcdfb_register()
469 	fb->regs = ioremap(fb->fb.fix.mmio_start, fb->fb.fix.mmio_len);  in clcdfb_register()
470 	if (!fb->regs) {  in clcdfb_register()
476 	fb->fb.fbops		= &clcdfb_ops;  in clcdfb_register()
477 	fb->fb.flags		= FBINFO_FLAG_DEFAULT;  in clcdfb_register()
478 	fb->fb.pseudo_palette	= fb->cmap;  in clcdfb_register()
480 	strncpy(fb->fb.fix.id, clcd_name, sizeof(fb->fb.fix.id));  in clcdfb_register()
481 	fb->fb.fix.type		= FB_TYPE_PACKED_PIXELS;  in clcdfb_register()
482 	fb->fb.fix.type_aux	= 0;  in clcdfb_register()
483 	fb->fb.fix.xpanstep	= 0;  in clcdfb_register()
484 	fb->fb.fix.ypanstep	= 0;  in clcdfb_register()
485 	fb->fb.fix.ywrapstep	= 0;  in clcdfb_register()
486 	fb->fb.fix.accel	= FB_ACCEL_NONE;  in clcdfb_register()
488 	fb->fb.var.xres		= fb->panel->mode.xres;  in clcdfb_register()
489 	fb->fb.var.yres		= fb->panel->mode.yres;  in clcdfb_register()
490 	fb->fb.var.xres_virtual	= fb->panel->mode.xres;  in clcdfb_register()
491 	fb->fb.var.yres_virtual	= fb->panel->mode.yres;  in clcdfb_register()
492 	fb->fb.var.bits_per_pixel = fb->panel->bpp;  in clcdfb_register()
493 	fb->fb.var.grayscale	= fb->panel->grayscale;  in clcdfb_register()
494 	fb->fb.var.pixclock	= fb->panel->mode.pixclock;  in clcdfb_register()
495 	fb->fb.var.left_margin	= fb->panel->mode.left_margin;  in clcdfb_register()
496 	fb->fb.var.right_margin	= fb->panel->mode.right_margin;  in clcdfb_register()
497 	fb->fb.var.upper_margin	= fb->panel->mode.upper_margin;  in clcdfb_register()
498 	fb->fb.var.lower_margin	= fb->panel->mode.lower_margin;  in clcdfb_register()
499 	fb->fb.var.hsync_len	= fb->panel->mode.hsync_len;  in clcdfb_register()
500 	fb->fb.var.vsync_len	= fb->panel->mode.vsync_len;  in clcdfb_register()
501 	fb->fb.var.sync		= fb->panel->mode.sync;  in clcdfb_register()
502 	fb->fb.var.vmode	= fb->panel->mode.vmode;  in clcdfb_register()
503 	fb->fb.var.activate	= FB_ACTIVATE_NOW;  in clcdfb_register()
504 	fb->fb.var.nonstd	= 0;  in clcdfb_register()
505 	fb->fb.var.height	= fb->panel->height;  in clcdfb_register()
506 	fb->fb.var.width	= fb->panel->width;  in clcdfb_register()
507 	fb->fb.var.accel_flags	= 0;  in clcdfb_register()
509 	fb->fb.monspecs.hfmin	= 0;  in clcdfb_register()
510 	fb->fb.monspecs.hfmax   = 100000;  in clcdfb_register()
511 	fb->fb.monspecs.vfmin	= 0;  in clcdfb_register()
512 	fb->fb.monspecs.vfmax	= 400;  in clcdfb_register()
513 	fb->fb.monspecs.dclkmin = 1000000;  in clcdfb_register()
514 	fb->fb.monspecs.dclkmax	= 100000000;  in clcdfb_register()
519 	clcdfb_set_bitfields(fb, &fb->fb.var);  in clcdfb_register()
524 	ret = fb_alloc_cmap(&fb->fb.cmap, 256, 0);  in clcdfb_register()
531 	writel(0, fb->regs + fb->off_ienb);  in clcdfb_register()
533 	fb_set_var(&fb->fb, &fb->fb.var);  in clcdfb_register()
535 	dev_info(&fb->dev->dev, "%s hardware, %s display\n",  in clcdfb_register()
536 	         fb->board->name, fb->panel->mode.name);  in clcdfb_register()
538 	ret = register_framebuffer(&fb->fb);  in clcdfb_register()
544 	fb_dealloc_cmap(&fb->fb.cmap);  in clcdfb_register()
546 	iounmap(fb->regs);  in clcdfb_register()
548 	clk_unprepare(fb->clk);  in clcdfb_register()
550 	clk_put(fb->clk);  in clcdfb_register()
647 static int clcdfb_of_init_tft_panel(struct clcd_fb *fb, u32 r0, u32 g0, u32 b0)  in clcdfb_of_init_tft_panel()  argument
667 	fb->panel->tim2 |= TIM2_BCD;  in clcdfb_of_init_tft_panel()
670 	fb->panel->cntl |= CNTL_LCDTFT | CNTL_LCDVCOMP(1);  in clcdfb_of_init_tft_panel()
672 	fb->panel->caps = 0;  in clcdfb_of_init_tft_panel()
675 	for (i = 0; i < ARRAY_SIZE(panels) && !fb->panel->caps; i++) {  in clcdfb_of_init_tft_panel()
676 		if (amba_part(fb->dev) != panels[i].part)  in clcdfb_of_init_tft_panel()
681 			fb->panel->caps = panels[i].caps;  in clcdfb_of_init_tft_panel()
689 		fb->panel->bgr_connection = true;  in clcdfb_of_init_tft_panel()
691 	return fb->panel->caps ? 0 : -EINVAL;  in clcdfb_of_init_tft_panel()
694 static int clcdfb_of_init_display(struct clcd_fb *fb)  in clcdfb_of_init_display()  argument
702 	fb->panel = devm_kzalloc(&fb->dev->dev, sizeof(*fb->panel), GFP_KERNEL);  in clcdfb_of_init_display()
703 	if (!fb->panel)  in clcdfb_of_init_display()
709 	endpoint = of_graph_get_next_endpoint(fb->dev->dev.of_node, NULL);  in clcdfb_of_init_display()
717 	err = clcdfb_of_get_backlight(&fb->dev->dev, fb->panel);  in clcdfb_of_init_display()
721 	err = clcdfb_of_get_mode(&fb->dev->dev, panel, fb->panel);  in clcdfb_of_init_display()
725 	err = of_property_read_u32(fb->dev->dev.of_node, "max-memory-bandwidth",  in clcdfb_of_init_display()
736 			/ PICOS2KHZ(fb->panel->mode.pixclock);  in clcdfb_of_init_display()
742 	fb->panel->bpp = bpp;  in clcdfb_of_init_display()
745 	fb->panel->cntl |= CNTL_BEBO;  in clcdfb_of_init_display()
747 	fb->panel->width = -1;  in clcdfb_of_init_display()
748 	fb->panel->height = -1;  in clcdfb_of_init_display()
755 	return clcdfb_of_init_tft_panel(fb, tft_r0b0g0[0],  in clcdfb_of_init_display()
759 static int clcdfb_of_vram_setup(struct clcd_fb *fb)  in clcdfb_of_vram_setup()  argument
765 	err = clcdfb_of_init_display(fb);  in clcdfb_of_vram_setup()
769 	memory = of_parse_phandle(fb->dev->dev.of_node, "memory-region", 0);  in clcdfb_of_vram_setup()
773 	fb->fb.screen_base = of_iomap(memory, 0);  in clcdfb_of_vram_setup()
774 	if (!fb->fb.screen_base)  in clcdfb_of_vram_setup()
777 	fb->fb.fix.smem_start = of_translate_address(memory,  in clcdfb_of_vram_setup()
779 	fb->fb.fix.smem_len = size;  in clcdfb_of_vram_setup()
784 static int clcdfb_of_vram_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)  in clcdfb_of_vram_mmap()  argument
791 	kernel_size = fb->fb.fix.smem_len;  in clcdfb_of_vram_mmap()
797 			__phys_to_pfn(fb->fb.fix.smem_start) + vma->vm_pgoff,  in clcdfb_of_vram_mmap()
802 static void clcdfb_of_vram_remove(struct clcd_fb *fb)  in clcdfb_of_vram_remove()  argument
804 	iounmap(fb->fb.screen_base);  in clcdfb_of_vram_remove()
807 static int clcdfb_of_dma_setup(struct clcd_fb *fb)  in clcdfb_of_dma_setup()  argument
813 	err = clcdfb_of_init_display(fb);  in clcdfb_of_dma_setup()
817 	framesize = PAGE_ALIGN(fb->panel->mode.xres * fb->panel->mode.yres *  in clcdfb_of_dma_setup()
818 			fb->panel->bpp / 8);  in clcdfb_of_dma_setup()
819 	fb->fb.screen_base = dma_alloc_coherent(&fb->dev->dev, framesize,  in clcdfb_of_dma_setup()
821 	if (!fb->fb.screen_base)  in clcdfb_of_dma_setup()
824 	fb->fb.fix.smem_start = dma;  in clcdfb_of_dma_setup()
825 	fb->fb.fix.smem_len = framesize;  in clcdfb_of_dma_setup()
830 static int clcdfb_of_dma_mmap(struct clcd_fb *fb, struct vm_area_struct *vma)  in clcdfb_of_dma_mmap()  argument
832 	return dma_mmap_wc(&fb->dev->dev, vma, fb->fb.screen_base,  in clcdfb_of_dma_mmap()
833 			   fb->fb.fix.smem_start, fb->fb.fix.smem_len);  in clcdfb_of_dma_mmap()
836 static void clcdfb_of_dma_remove(struct clcd_fb *fb)  in clcdfb_of_dma_remove()  argument
838 	dma_free_coherent(&fb->dev->dev, fb->fb.fix.smem_len,  in clcdfb_of_dma_remove()
839 			fb->fb.screen_base, fb->fb.fix.smem_start);  in clcdfb_of_dma_remove()
877 	struct clcd_fb *fb;  in clcdfb_probe()  local
896 	fb = kzalloc(sizeof(*fb), GFP_KERNEL);  in clcdfb_probe()
897 	if (!fb) {  in clcdfb_probe()
902 	fb->dev = dev;  in clcdfb_probe()
903 	fb->board = board;  in clcdfb_probe()
905 	dev_info(&fb->dev->dev, "PL%03x designer %02x rev%u at 0x%08llx\n",  in clcdfb_probe()
909 	ret = fb->board->setup(fb);  in clcdfb_probe()
913 	ret = clcdfb_register(fb);  in clcdfb_probe()
915 		amba_set_drvdata(dev, fb);  in clcdfb_probe()
919 	fb->board->remove(fb);  in clcdfb_probe()
921 	kfree(fb);  in clcdfb_probe()
930 	struct clcd_fb *fb = amba_get_drvdata(dev);  in clcdfb_remove()  local
932 	clcdfb_disable(fb);  in clcdfb_remove()
933 	unregister_framebuffer(&fb->fb);  in clcdfb_remove()
934 	if (fb->fb.cmap.len)  in clcdfb_remove()
935 		fb_dealloc_cmap(&fb->fb.cmap);  in clcdfb_remove()
936 	iounmap(fb->regs);  in clcdfb_remove()
937 	clk_unprepare(fb->clk);  in clcdfb_remove()
938 	clk_put(fb->clk);  in clcdfb_remove()
940 	fb->board->remove(fb);  in clcdfb_remove()
942 	kfree(fb);  in clcdfb_remove()