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");