2 * Freescale i.MX Frame Buffer device driver
4 * Copyright (C) 2004 Sascha Hauer, Pengutronix
5 * Based on acornfb.c Copyright (C) Russell King.
7 * This file is subject to the terms and conditions of the GNU General Public
8 * License. See the file COPYING in the main directory of this archive for
11 * Please direct your questions and comments on this driver to the following
14 * linux-arm-kernel@lists.arm.linux.org.uk
17 #include <linux/module.h>
18 #include <linux/kernel.h>
19 #include <linux/errno.h>
20 #include <linux/string.h>
21 #include <linux/interrupt.h>
22 #include <linux/slab.h>
25 #include <linux/delay.h>
26 #include <linux/init.h>
27 #include <linux/ioport.h>
28 #include <linux/cpufreq.h>
29 #include <linux/clk.h>
30 #include <linux/platform_device.h>
31 #include <linux/dma-mapping.h>
33 #include <linux/math64.h>
35 #include <mach/imxfb.h>
36 #include <mach/hardware.h>
39 * Complain if VAR is out of range.
43 #define DRIVER_NAME "imx-fb"
47 #define LCDC_SIZE 0x04
48 #define SIZE_XMAX(x) ((((x) >> 4) & 0x3f) << 20)
50 #ifdef CONFIG_ARCH_MX1
51 #define SIZE_YMAX(y) ((y) & 0x1ff)
53 #define SIZE_YMAX(y) ((y) & 0x3ff)
57 #define VPW_VPW(x) ((x) & 0x3ff)
59 #define LCDC_CPOS 0x0C
60 #define CPOS_CC1 (1<<31)
61 #define CPOS_CC0 (1<<30)
62 #define CPOS_OP (1<<28)
63 #define CPOS_CXP(x) (((x) & 3ff) << 16)
65 #ifdef CONFIG_ARCH_MX1
66 #define CPOS_CYP(y) ((y) & 0x1ff)
68 #define CPOS_CYP(y) ((y) & 0x3ff)
71 #define LCDC_LCWHB 0x10
72 #define LCWHB_BK_EN (1<<31)
73 #define LCWHB_CW(w) (((w) & 0x1f) << 24)
74 #define LCWHB_CH(h) (((h) & 0x1f) << 16)
75 #define LCWHB_BD(x) ((x) & 0xff)
77 #define LCDC_LCHCC 0x14
79 #ifdef CONFIG_ARCH_MX1
80 #define LCHCC_CUR_COL_R(r) (((r) & 0x1f) << 11)
81 #define LCHCC_CUR_COL_G(g) (((g) & 0x3f) << 5)
82 #define LCHCC_CUR_COL_B(b) ((b) & 0x1f)
84 #define LCHCC_CUR_COL_R(r) (((r) & 0x3f) << 12)
85 #define LCHCC_CUR_COL_G(g) (((g) & 0x3f) << 6)
86 #define LCHCC_CUR_COL_B(b) ((b) & 0x3f)
92 #define HCR_H_WIDTH(x) (((x) & 0x3f) << 26)
93 #define HCR_H_WAIT_1(x) (((x) & 0xff) << 8)
94 #define HCR_H_WAIT_2(x) ((x) & 0xff)
97 #define VCR_V_WIDTH(x) (((x) & 0x3f) << 26)
98 #define VCR_V_WAIT_1(x) (((x) & 0xff) << 8)
99 #define VCR_V_WAIT_2(x) ((x) & 0xff)
101 #define LCDC_POS 0x24
102 #define POS_POS(x) ((x) & 1f)
104 #define LCDC_LSCR1 0x28
105 /* bit fields in imxfb.h */
107 #define LCDC_PWMR 0x2C
108 /* bit fields in imxfb.h */
110 #define LCDC_DMACR 0x30
111 /* bit fields in imxfb.h */
113 #define LCDC_RMCR 0x34
115 #ifdef CONFIG_ARCH_MX1
116 #define RMCR_LCDC_EN (1<<1)
118 #define RMCR_LCDC_EN 0
121 #define RMCR_SELF_REF (1<<0)
123 #define LCDC_LCDICR 0x38
124 #define LCDICR_INT_SYN (1<<2)
125 #define LCDICR_INT_CON (1)
127 #define LCDC_LCDISR 0x40
128 #define LCDISR_UDR_ERR (1<<3)
129 #define LCDISR_ERR_RES (1<<2)
130 #define LCDISR_EOF (1<<1)
131 #define LCDISR_BOF (1<<0)
133 /* Used fb-mode. Can be set on kernel command line, therefore file-static. */
134 static const char *fb_mode;
138 * These are the bitfields for each
139 * display depth that we support.
142 struct fb_bitfield red;
143 struct fb_bitfield green;
144 struct fb_bitfield blue;
145 struct fb_bitfield transp;
149 struct platform_device *pdev;
154 * These are the addresses we mapped
155 * the framebuffer memory region to.
162 dma_addr_t screen_dma;
172 u_int cmap_inverse:1,
176 struct imx_fb_videomode *mode;
178 struct backlight_device *bl;
180 void (*lcd_power)(int);
181 void (*backlight_power)(int);
184 #define IMX_NAME "IMX"
187 * Minimum X and Y resolutions
192 /* Actually this really is 18bit support, the lowest 2 bits of each colour
193 * are unused in hardware. We claim to have 24bit support to make software
194 * like X work, which does not support 18bit.
196 static struct imxfb_rgb def_rgb_18 = {
197 .red = {.offset = 16, .length = 8,},
198 .green = {.offset = 8, .length = 8,},
199 .blue = {.offset = 0, .length = 8,},
200 .transp = {.offset = 0, .length = 0,},
203 static struct imxfb_rgb def_rgb_16_tft = {
204 .red = {.offset = 11, .length = 5,},
205 .green = {.offset = 5, .length = 6,},
206 .blue = {.offset = 0, .length = 5,},
207 .transp = {.offset = 0, .length = 0,},
210 static struct imxfb_rgb def_rgb_16_stn = {
211 .red = {.offset = 8, .length = 4,},
212 .green = {.offset = 4, .length = 4,},
213 .blue = {.offset = 0, .length = 4,},
214 .transp = {.offset = 0, .length = 0,},
217 static struct imxfb_rgb def_rgb_8 = {
218 .red = {.offset = 0, .length = 8,},
219 .green = {.offset = 0, .length = 8,},
220 .blue = {.offset = 0, .length = 8,},
221 .transp = {.offset = 0, .length = 0,},
224 static int imxfb_activate_var(struct fb_var_screeninfo *var,
225 struct fb_info *info);
227 static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
230 chan >>= 16 - bf->length;
231 return chan << bf->offset;
234 static int imxfb_setpalettereg(u_int regno, u_int red, u_int green, u_int blue,
235 u_int trans, struct fb_info *info)
237 struct imxfb_info *fbi = info->par;
240 #define CNVT_TOHW(val,width) ((((val)<<(width))+0x7FFF-(val))>>16)
241 if (regno < fbi->palette_size) {
242 val = (CNVT_TOHW(red, 4) << 8) |
243 (CNVT_TOHW(green,4) << 4) |
246 writel(val, fbi->regs + 0x800 + (regno << 2));
252 static int imxfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
253 u_int trans, struct fb_info *info)
255 struct imxfb_info *fbi = info->par;
260 * If inverse mode was selected, invert all the colours
261 * rather than the register number. The register number
262 * is what you poke into the framebuffer to produce the
263 * colour you requested.
265 if (fbi->cmap_inverse) {
267 green = 0xffff - green;
268 blue = 0xffff - blue;
272 * If greyscale is true, then we convert the RGB value
273 * to greyscale no mater what visual we are using.
275 if (info->var.grayscale)
276 red = green = blue = (19595 * red + 38470 * green +
279 switch (info->fix.visual) {
280 case FB_VISUAL_TRUECOLOR:
282 * 12 or 16-bit True Colour. We encode the RGB value
283 * according to the RGB bitfield information.
286 u32 *pal = info->pseudo_palette;
288 val = chan_to_field(red, &info->var.red);
289 val |= chan_to_field(green, &info->var.green);
290 val |= chan_to_field(blue, &info->var.blue);
297 case FB_VISUAL_STATIC_PSEUDOCOLOR:
298 case FB_VISUAL_PSEUDOCOLOR:
299 ret = imxfb_setpalettereg(regno, red, green, blue, trans, info);
306 static const struct imx_fb_videomode *imxfb_find_mode(struct imxfb_info *fbi)
308 struct imx_fb_videomode *m;
311 for (i = 0, m = &fbi->mode[0]; i < fbi->num_modes; i++, m++) {
312 if (!strcmp(m->mode.name, fb_mode))
320 * Round up in the following order: bits_per_pixel, xres,
321 * yres, xres_virtual, yres_virtual, xoffset, yoffset, grayscale,
322 * bitfields, horizontal timing, vertical timing.
324 static int imxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
326 struct imxfb_info *fbi = info->par;
327 struct imxfb_rgb *rgb;
328 const struct imx_fb_videomode *imxfb_mode;
329 unsigned long lcd_clk;
330 unsigned long long tmp;
333 if (var->xres < MIN_XRES)
334 var->xres = MIN_XRES;
335 if (var->yres < MIN_YRES)
336 var->yres = MIN_YRES;
338 imxfb_mode = imxfb_find_mode(fbi);
342 var->xres = imxfb_mode->mode.xres;
343 var->yres = imxfb_mode->mode.yres;
344 var->bits_per_pixel = imxfb_mode->bpp;
345 var->pixclock = imxfb_mode->mode.pixclock;
346 var->hsync_len = imxfb_mode->mode.hsync_len;
347 var->left_margin = imxfb_mode->mode.left_margin;
348 var->right_margin = imxfb_mode->mode.right_margin;
349 var->vsync_len = imxfb_mode->mode.vsync_len;
350 var->upper_margin = imxfb_mode->mode.upper_margin;
351 var->lower_margin = imxfb_mode->mode.lower_margin;
352 var->sync = imxfb_mode->mode.sync;
353 var->xres_virtual = max(var->xres_virtual, var->xres);
354 var->yres_virtual = max(var->yres_virtual, var->yres);
356 pr_debug("var->bits_per_pixel=%d\n", var->bits_per_pixel);
358 lcd_clk = clk_get_rate(fbi->clk);
360 tmp = var->pixclock * (unsigned long long)lcd_clk;
362 do_div(tmp, 1000000);
364 if (do_div(tmp, 1000000) > 500000)
367 pcr = (unsigned int)tmp;
371 printk(KERN_WARNING "Must limit pixel clock to %luHz\n",
375 switch (var->bits_per_pixel) {
387 if (imxfb_mode->pcr & PCR_TFT)
388 rgb = &def_rgb_16_tft;
390 rgb = &def_rgb_16_stn;
398 /* add sync polarities */
399 pcr |= imxfb_mode->pcr & ~(0x3f | (7 << 25));
404 * Copy the RGB parameters for this display
405 * from the machine specific parameters.
408 var->green = rgb->green;
409 var->blue = rgb->blue;
410 var->transp = rgb->transp;
412 pr_debug("RGBT length = %d:%d:%d:%d\n",
413 var->red.length, var->green.length, var->blue.length,
416 pr_debug("RGBT offset = %d:%d:%d:%d\n",
417 var->red.offset, var->green.offset, var->blue.offset,
425 * Set the user defined part of the display for the specified console
427 static int imxfb_set_par(struct fb_info *info)
429 struct imxfb_info *fbi = info->par;
430 struct fb_var_screeninfo *var = &info->var;
432 if (var->bits_per_pixel == 16 || var->bits_per_pixel == 32)
433 info->fix.visual = FB_VISUAL_TRUECOLOR;
434 else if (!fbi->cmap_static)
435 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
438 * Some people have weird ideas about wanting static
439 * pseudocolor maps. I suspect their user space
440 * applications are broken.
442 info->fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
445 info->fix.line_length = var->xres_virtual * var->bits_per_pixel / 8;
446 fbi->palette_size = var->bits_per_pixel == 8 ? 256 : 16;
448 imxfb_activate_var(var, info);
455 static int imxfb_bl_get_brightness(struct backlight_device *bl)
457 struct imxfb_info *fbi = bl_get_data(bl);
459 return readl(fbi->regs + LCDC_PWMR) & 0xFF;
462 static int imxfb_bl_update_status(struct backlight_device *bl)
464 struct imxfb_info *fbi = bl_get_data(bl);
465 int brightness = bl->props.brightness;
467 if (bl->props.power != FB_BLANK_UNBLANK)
469 if (bl->props.fb_blank != FB_BLANK_UNBLANK)
472 fbi->pwmr = (fbi->pwmr & ~0xFF) | brightness;
474 if (bl->props.fb_blank != FB_BLANK_UNBLANK)
475 clk_enable(fbi->clk);
476 writel(fbi->pwmr, fbi->regs + LCDC_PWMR);
477 if (bl->props.fb_blank != FB_BLANK_UNBLANK)
478 clk_disable(fbi->clk);
483 static const struct backlight_ops imxfb_lcdc_bl_ops = {
484 .update_status = imxfb_bl_update_status,
485 .get_brightness = imxfb_bl_get_brightness,
488 static void imxfb_init_backlight(struct imxfb_info *fbi)
490 struct backlight_properties props;
491 struct backlight_device *bl;
496 memset(&props, 0, sizeof(struct backlight_properties));
497 props.max_brightness = 0xff;
498 writel(fbi->pwmr, fbi->regs + LCDC_PWMR);
500 bl = backlight_device_register("imxfb-bl", &fbi->pdev->dev, fbi,
501 &imxfb_lcdc_bl_ops, &props);
503 dev_err(&fbi->pdev->dev, "error %ld on backlight register\n",
509 bl->props.power = FB_BLANK_UNBLANK;
510 bl->props.fb_blank = FB_BLANK_UNBLANK;
511 bl->props.brightness = imxfb_bl_get_brightness(bl);
514 static void imxfb_exit_backlight(struct imxfb_info *fbi)
517 backlight_device_unregister(fbi->bl);
520 static void imxfb_enable_controller(struct imxfb_info *fbi)
522 pr_debug("Enabling LCD controller\n");
524 writel(fbi->screen_dma, fbi->regs + LCDC_SSA);
526 /* panning offset 0 (0 pixel offset) */
527 writel(0x00000000, fbi->regs + LCDC_POS);
529 /* disable hardware cursor */
530 writel(readl(fbi->regs + LCDC_CPOS) & ~(CPOS_CC0 | CPOS_CC1),
531 fbi->regs + LCDC_CPOS);
533 writel(RMCR_LCDC_EN, fbi->regs + LCDC_RMCR);
535 clk_enable(fbi->clk);
537 if (fbi->backlight_power)
538 fbi->backlight_power(1);
543 static void imxfb_disable_controller(struct imxfb_info *fbi)
545 pr_debug("Disabling LCD controller\n");
547 if (fbi->backlight_power)
548 fbi->backlight_power(0);
552 clk_disable(fbi->clk);
554 writel(0, fbi->regs + LCDC_RMCR);
557 static int imxfb_blank(int blank, struct fb_info *info)
559 struct imxfb_info *fbi = info->par;
561 pr_debug("imxfb_blank: blank=%d\n", blank);
564 case FB_BLANK_POWERDOWN:
565 case FB_BLANK_VSYNC_SUSPEND:
566 case FB_BLANK_HSYNC_SUSPEND:
567 case FB_BLANK_NORMAL:
568 imxfb_disable_controller(fbi);
571 case FB_BLANK_UNBLANK:
572 imxfb_enable_controller(fbi);
578 static struct fb_ops imxfb_ops = {
579 .owner = THIS_MODULE,
580 .fb_check_var = imxfb_check_var,
581 .fb_set_par = imxfb_set_par,
582 .fb_setcolreg = imxfb_setcolreg,
583 .fb_fillrect = cfb_fillrect,
584 .fb_copyarea = cfb_copyarea,
585 .fb_imageblit = cfb_imageblit,
586 .fb_blank = imxfb_blank,
590 * imxfb_activate_var():
591 * Configures LCD Controller based on entries in var parameter. Settings are
592 * only written to the controller if changes were made.
594 static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *info)
596 struct imxfb_info *fbi = info->par;
598 pr_debug("var: xres=%d hslen=%d lm=%d rm=%d\n",
599 var->xres, var->hsync_len,
600 var->left_margin, var->right_margin);
601 pr_debug("var: yres=%d vslen=%d um=%d bm=%d\n",
602 var->yres, var->vsync_len,
603 var->upper_margin, var->lower_margin);
606 if (var->xres < 16 || var->xres > 1024)
607 printk(KERN_ERR "%s: invalid xres %d\n",
608 info->fix.id, var->xres);
609 if (var->hsync_len < 1 || var->hsync_len > 64)
610 printk(KERN_ERR "%s: invalid hsync_len %d\n",
611 info->fix.id, var->hsync_len);
612 if (var->left_margin > 255)
613 printk(KERN_ERR "%s: invalid left_margin %d\n",
614 info->fix.id, var->left_margin);
615 if (var->right_margin > 255)
616 printk(KERN_ERR "%s: invalid right_margin %d\n",
617 info->fix.id, var->right_margin);
618 if (var->yres < 1 || var->yres > 511)
619 printk(KERN_ERR "%s: invalid yres %d\n",
620 info->fix.id, var->yres);
621 if (var->vsync_len > 100)
622 printk(KERN_ERR "%s: invalid vsync_len %d\n",
623 info->fix.id, var->vsync_len);
624 if (var->upper_margin > 63)
625 printk(KERN_ERR "%s: invalid upper_margin %d\n",
626 info->fix.id, var->upper_margin);
627 if (var->lower_margin > 255)
628 printk(KERN_ERR "%s: invalid lower_margin %d\n",
629 info->fix.id, var->lower_margin);
632 /* physical screen start address */
633 writel(VPW_VPW(var->xres * var->bits_per_pixel / 8 / 4),
634 fbi->regs + LCDC_VPW);
636 writel(HCR_H_WIDTH(var->hsync_len - 1) |
637 HCR_H_WAIT_1(var->right_margin - 1) |
638 HCR_H_WAIT_2(var->left_margin - 3),
639 fbi->regs + LCDC_HCR);
641 writel(VCR_V_WIDTH(var->vsync_len) |
642 VCR_V_WAIT_1(var->lower_margin) |
643 VCR_V_WAIT_2(var->upper_margin),
644 fbi->regs + LCDC_VCR);
646 writel(SIZE_XMAX(var->xres) | SIZE_YMAX(var->yres),
647 fbi->regs + LCDC_SIZE);
649 writel(fbi->pcr, fbi->regs + LCDC_PCR);
650 writel(fbi->lscr1, fbi->regs + LCDC_LSCR1);
651 writel(fbi->dmacr, fbi->regs + LCDC_DMACR);
658 * Power management hooks. Note that we won't be called from IRQ context,
659 * unlike the blank functions above, so we may sleep.
661 static int imxfb_suspend(struct platform_device *dev, pm_message_t state)
663 struct fb_info *info = platform_get_drvdata(dev);
664 struct imxfb_info *fbi = info->par;
666 pr_debug("%s\n", __func__);
668 imxfb_disable_controller(fbi);
672 static int imxfb_resume(struct platform_device *dev)
674 struct fb_info *info = platform_get_drvdata(dev);
675 struct imxfb_info *fbi = info->par;
677 pr_debug("%s\n", __func__);
679 imxfb_enable_controller(fbi);
683 #define imxfb_suspend NULL
684 #define imxfb_resume NULL
687 static int __init imxfb_init_fbinfo(struct platform_device *pdev)
689 struct imx_fb_platform_data *pdata = pdev->dev.platform_data;
690 struct fb_info *info = dev_get_drvdata(&pdev->dev);
691 struct imxfb_info *fbi = info->par;
692 struct imx_fb_videomode *m;
695 pr_debug("%s\n",__func__);
697 info->pseudo_palette = kmalloc(sizeof(u32) * 16, GFP_KERNEL);
698 if (!info->pseudo_palette)
701 memset(fbi, 0, sizeof(struct imxfb_info));
703 strlcpy(info->fix.id, IMX_NAME, sizeof(info->fix.id));
705 info->fix.type = FB_TYPE_PACKED_PIXELS;
706 info->fix.type_aux = 0;
707 info->fix.xpanstep = 0;
708 info->fix.ypanstep = 0;
709 info->fix.ywrapstep = 0;
710 info->fix.accel = FB_ACCEL_NONE;
712 info->var.nonstd = 0;
713 info->var.activate = FB_ACTIVATE_NOW;
714 info->var.height = -1;
715 info->var.width = -1;
716 info->var.accel_flags = 0;
717 info->var.vmode = FB_VMODE_NONINTERLACED;
719 info->fbops = &imxfb_ops;
720 info->flags = FBINFO_FLAG_DEFAULT |
722 info->var.grayscale = pdata->cmap_greyscale;
723 fbi->cmap_inverse = pdata->cmap_inverse;
724 fbi->cmap_static = pdata->cmap_static;
725 fbi->lscr1 = pdata->lscr1;
726 fbi->dmacr = pdata->dmacr;
727 fbi->pwmr = pdata->pwmr;
728 fbi->lcd_power = pdata->lcd_power;
729 fbi->backlight_power = pdata->backlight_power;
731 for (i = 0, m = &pdata->mode[0]; i < pdata->num_modes; i++, m++)
732 info->fix.smem_len = max_t(size_t, info->fix.smem_len,
733 m->mode.xres * m->mode.yres * m->bpp / 8);
738 static int __init imxfb_probe(struct platform_device *pdev)
740 struct imxfb_info *fbi;
741 struct fb_info *info;
742 struct imx_fb_platform_data *pdata;
743 struct resource *res;
746 dev_info(&pdev->dev, "i.MX Framebuffer driver\n");
748 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
752 pdata = pdev->dev.platform_data;
754 dev_err(&pdev->dev,"No platform_data available\n");
758 info = framebuffer_alloc(sizeof(struct imxfb_info), &pdev->dev);
765 fb_mode = pdata->mode[0].mode.name;
767 platform_set_drvdata(pdev, info);
769 ret = imxfb_init_fbinfo(pdev);
773 res = request_mem_region(res->start, resource_size(res),
780 fbi->clk = clk_get(&pdev->dev, NULL);
781 if (IS_ERR(fbi->clk)) {
782 ret = PTR_ERR(fbi->clk);
783 dev_err(&pdev->dev, "unable to get clock: %d\n", ret);
784 goto failed_getclock;
787 fbi->regs = ioremap(res->start, resource_size(res));
788 if (fbi->regs == NULL) {
789 dev_err(&pdev->dev, "Cannot map frame buffer registers\n");
793 if (!pdata->fixed_screen_cpu) {
794 fbi->map_size = PAGE_ALIGN(info->fix.smem_len);
795 fbi->map_cpu = dma_alloc_writecombine(&pdev->dev,
796 fbi->map_size, &fbi->map_dma, GFP_KERNEL);
799 dev_err(&pdev->dev, "Failed to allocate video RAM: %d\n", ret);
804 info->screen_base = fbi->map_cpu;
805 fbi->screen_cpu = fbi->map_cpu;
806 fbi->screen_dma = fbi->map_dma;
807 info->fix.smem_start = fbi->screen_dma;
809 /* Fixed framebuffer mapping enables location of the screen in eSRAM */
810 fbi->map_cpu = pdata->fixed_screen_cpu;
811 fbi->map_dma = pdata->fixed_screen_dma;
812 info->screen_base = fbi->map_cpu;
813 fbi->screen_cpu = fbi->map_cpu;
814 fbi->screen_dma = fbi->map_dma;
815 info->fix.smem_start = fbi->screen_dma;
819 ret = pdata->init(fbi->pdev);
821 goto failed_platform_init;
824 fbi->mode = pdata->mode;
825 fbi->num_modes = pdata->num_modes;
827 INIT_LIST_HEAD(&info->modelist);
828 for (i = 0; i < pdata->num_modes; i++)
829 fb_add_videomode(&pdata->mode[i].mode, &info->modelist);
832 * This makes sure that our colour bitfield
833 * descriptors are correctly initialised.
835 imxfb_check_var(&info->var, info);
837 ret = fb_alloc_cmap(&info->cmap, 1 << info->var.bits_per_pixel, 0);
842 ret = register_framebuffer(info);
844 dev_err(&pdev->dev, "failed to register framebuffer\n");
845 goto failed_register;
848 imxfb_enable_controller(fbi);
850 imxfb_init_backlight(fbi);
855 fb_dealloc_cmap(&info->cmap);
858 pdata->exit(fbi->pdev);
859 failed_platform_init:
860 if (!pdata->fixed_screen_cpu)
861 dma_free_writecombine(&pdev->dev,fbi->map_size,fbi->map_cpu,
868 release_mem_region(res->start, resource_size(res));
870 kfree(info->pseudo_palette);
872 platform_set_drvdata(pdev, NULL);
873 framebuffer_release(info);
877 static int __devexit imxfb_remove(struct platform_device *pdev)
879 struct imx_fb_platform_data *pdata;
880 struct fb_info *info = platform_get_drvdata(pdev);
881 struct imxfb_info *fbi = info->par;
882 struct resource *res;
884 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
886 imxfb_disable_controller(fbi);
888 imxfb_exit_backlight(fbi);
889 unregister_framebuffer(info);
891 pdata = pdev->dev.platform_data;
893 pdata->exit(fbi->pdev);
895 fb_dealloc_cmap(&info->cmap);
896 kfree(info->pseudo_palette);
897 framebuffer_release(info);
900 release_mem_region(res->start, resource_size(res));
901 clk_disable(fbi->clk);
904 platform_set_drvdata(pdev, NULL);
909 void imxfb_shutdown(struct platform_device * dev)
911 struct fb_info *info = platform_get_drvdata(dev);
912 struct imxfb_info *fbi = info->par;
913 imxfb_disable_controller(fbi);
916 static struct platform_driver imxfb_driver = {
917 .suspend = imxfb_suspend,
918 .resume = imxfb_resume,
919 .remove = __devexit_p(imxfb_remove),
920 .shutdown = imxfb_shutdown,
926 static int imxfb_setup(void)
929 char *opt, *options = NULL;
931 if (fb_get_options("imxfb", &options))
934 if (!options || !*options)
937 while ((opt = strsep(&options, ",")) != NULL) {
947 int __init imxfb_init(void)
949 int ret = imxfb_setup();
954 return platform_driver_probe(&imxfb_driver, imxfb_probe);
957 static void __exit imxfb_cleanup(void)
959 platform_driver_unregister(&imxfb_driver);
962 module_init(imxfb_init);
963 module_exit(imxfb_cleanup);
965 MODULE_DESCRIPTION("Motorola i.MX framebuffer driver");
966 MODULE_AUTHOR("Sascha Hauer, Pengutronix");
967 MODULE_LICENSE("GPL");