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marcus.erl |
/*
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* linux/drivers/video/imxfb.c
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*
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* Freescale i.MX Frame Buffer device driver
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*
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* Copyright (C) 2004 Sascha Hauer, Pengutronix
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* Based on acornfb.c Copyright (C) Russell King.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive for
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* more details.
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*
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* Please direct your questions and comments on this driver to the following
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* email address:
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*
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* linux-arm-kernel@lists.arm.linux.org.uk
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*/
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//#define DEBUG 1
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/string.h>
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#include <linux/interrupt.h>
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#include <linux/slab.h>
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#include <linux/fb.h>
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#include <linux/delay.h>
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#include <linux/init.h>
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#include <linux/ioport.h>
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#include <linux/cpufreq.h>
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#include <linux/platform_device.h>
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#include <linux/dma-mapping.h>
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#include <asm/hardware.h>
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#include <asm/io.h>
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#include <asm/arch/imxfb.h>
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/*
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* Complain if VAR is out of range.
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*/
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#define DEBUG_VAR 1
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#include "imxfb.h"
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static struct imxfb_rgb def_rgb_16 = {
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.red = { .offset = 8, .length = 4, },
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.green = { .offset = 4, .length = 4, },
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.blue = { .offset = 0, .length = 4, },
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.transp = { .offset = 0, .length = 0, },
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};
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static struct imxfb_rgb def_rgb_8 = {
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.red = { .offset = 0, .length = 8, },
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.green = { .offset = 0, .length = 8, },
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.blue = { .offset = 0, .length = 8, },
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.transp = { .offset = 0, .length = 0, },
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};
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static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *info);
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static inline u_int chan_to_field(u_int chan, struct fb_bitfield *bf)
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{
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chan &= 0xffff;
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chan >>= 16 - bf->length;
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return chan << bf->offset;
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}
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#define LCDC_PALETTE(x) __REG2(IMX_LCDC_BASE+0x800, (x)<<2)
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static int
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imxfb_setpalettereg(u_int regno, u_int red, u_int green, u_int blue,
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u_int trans, struct fb_info *info)
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{
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struct imxfb_info *fbi = info->par;
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u_int val, ret = 1;
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#define CNVT_TOHW(val,width) ((((val)<<(width))+0x7FFF-(val))>>16)
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if (regno < fbi->palette_size) {
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val = (CNVT_TOHW(red, 4) << 8) |
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(CNVT_TOHW(green,4) << 4) |
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CNVT_TOHW(blue, 4);
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LCDC_PALETTE(regno) = val;
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ret = 0;
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}
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return ret;
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}
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static int
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imxfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
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u_int trans, struct fb_info *info)
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{
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struct imxfb_info *fbi = info->par;
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unsigned int val;
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int ret = 1;
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/*
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* If inverse mode was selected, invert all the colours
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* rather than the register number. The register number
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* is what you poke into the framebuffer to produce the
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* colour you requested.
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*/
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if (fbi->cmap_inverse) {
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red = 0xffff - red;
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green = 0xffff - green;
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blue = 0xffff - blue;
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}
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/*
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* If greyscale is true, then we convert the RGB value
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* to greyscale no mater what visual we are using.
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*/
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if (info->var.grayscale)
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red = green = blue = (19595 * red + 38470 * green +
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7471 * blue) >> 16;
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switch (info->fix.visual) {
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case FB_VISUAL_TRUECOLOR:
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/*
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* 12 or 16-bit True Colour. We encode the RGB value
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* according to the RGB bitfield information.
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*/
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if (regno < 16) {
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u32 *pal = info->pseudo_palette;
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val = chan_to_field(red, &info->var.red);
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val |= chan_to_field(green, &info->var.green);
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val |= chan_to_field(blue, &info->var.blue);
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pal[regno] = val;
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ret = 0;
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}
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break;
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case FB_VISUAL_STATIC_PSEUDOCOLOR:
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case FB_VISUAL_PSEUDOCOLOR:
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ret = imxfb_setpalettereg(regno, red, green, blue, trans, info);
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break;
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}
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return ret;
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}
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/*
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* imxfb_check_var():
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* Round up in the following order: bits_per_pixel, xres,
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* yres, xres_virtual, yres_virtual, xoffset, yoffset, grayscale,
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* bitfields, horizontal timing, vertical timing.
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*/
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static int
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imxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
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{
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struct imxfb_info *fbi = info->par;
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int rgbidx;
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if (var->xres < MIN_XRES)
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var->xres = MIN_XRES;
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if (var->yres < MIN_YRES)
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var->yres = MIN_YRES;
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if (var->xres > fbi->max_xres)
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var->xres = fbi->max_xres;
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if (var->yres > fbi->max_yres)
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var->yres = fbi->max_yres;
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var->xres_virtual = max(var->xres_virtual, var->xres);
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var->yres_virtual = max(var->yres_virtual, var->yres);
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pr_debug("var->bits_per_pixel=%d\n", var->bits_per_pixel);
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switch (var->bits_per_pixel) {
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case 16:
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rgbidx = RGB_16;
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break;
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case 8:
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rgbidx = RGB_8;
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break;
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default:
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rgbidx = RGB_16;
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}
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/*
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* Copy the RGB parameters for this display
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* from the machine specific parameters.
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*/
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var->red = fbi->rgb[rgbidx]->red;
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var->green = fbi->rgb[rgbidx]->green;
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var->blue = fbi->rgb[rgbidx]->blue;
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var->transp = fbi->rgb[rgbidx]->transp;
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pr_debug("RGBT length = %d:%d:%d:%d\n",
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var->red.length, var->green.length, var->blue.length,
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var->transp.length);
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pr_debug("RGBT offset = %d:%d:%d:%d\n",
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var->red.offset, var->green.offset, var->blue.offset,
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var->transp.offset);
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| 196 |
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return 0;
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}
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| 199 |
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/*
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* imxfb_set_par():
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* Set the user defined part of the display for the specified console
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*/
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static int imxfb_set_par(struct fb_info *info)
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{
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struct imxfb_info *fbi = info->par;
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| 206 |
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struct fb_var_screeninfo *var = &info->var;
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| 207 |
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| 208 |
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pr_debug("set_par\n");
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| 209 |
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| 210 |
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if (var->bits_per_pixel == 16)
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| 211 |
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info->fix.visual = FB_VISUAL_TRUECOLOR;
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| 212 |
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else if (!fbi->cmap_static)
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| 213 |
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info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
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| 214 |
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else {
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| 215 |
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/*
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* Some people have weird ideas about wanting static
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| 217 |
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* pseudocolor maps. I suspect their user space
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| 218 |
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* applications are broken.
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| 219 |
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*/
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| 220 |
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info->fix.visual = FB_VISUAL_STATIC_PSEUDOCOLOR;
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| 221 |
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}
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| 222 |
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| 223 |
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info->fix.line_length = var->xres_virtual *
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| 224 |
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var->bits_per_pixel / 8;
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| 225 |
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fbi->palette_size = var->bits_per_pixel == 8 ? 256 : 16;
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| 226 |
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| 227 |
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imxfb_activate_var(var, info);
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| 228 |
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| 229 |
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return 0;
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| 230 |
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}
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| 231 |
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| 232 |
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static void imxfb_enable_controller(struct imxfb_info *fbi)
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| 233 |
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{
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| 234 |
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pr_debug("Enabling LCD controller\n");
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| 235 |
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| 236 |
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/* initialize LCDC */
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| 237 |
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LCDC_RMCR &= ~RMCR_LCDC_EN; /* just to be safe... */
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| 238 |
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| 239 |
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LCDC_SSA = fbi->screen_dma;
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| 240 |
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/* physical screen start address */
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| 241 |
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LCDC_VPW = VPW_VPW(fbi->max_xres * fbi->max_bpp / 8 / 4);
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| 242 |
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| 243 |
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LCDC_POS = 0x00000000; /* panning offset 0 (0 pixel offset) */
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| 244 |
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| 245 |
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/* disable hardware cursor */
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| 246 |
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LCDC_CPOS &= ~(CPOS_CC0 | CPOS_CC1);
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| 247 |
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| 248 |
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LCDC_RMCR = RMCR_LCDC_EN;
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| 249 |
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| 250 |
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if(fbi->backlight_power)
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| 251 |
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fbi->backlight_power(1);
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| 252 |
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if(fbi->lcd_power)
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| 253 |
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fbi->lcd_power(1);
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| 254 |
|
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}
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| 255 |
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| 256 |
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static void imxfb_disable_controller(struct imxfb_info *fbi)
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| 257 |
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{
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| 258 |
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pr_debug("Disabling LCD controller\n");
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| 259 |
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| 260 |
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if(fbi->backlight_power)
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| 261 |
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fbi->backlight_power(0);
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| 262 |
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if(fbi->lcd_power)
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| 263 |
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fbi->lcd_power(0);
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| 264 |
|
|
|
| 265 |
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LCDC_RMCR = 0;
|
| 266 |
|
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}
|
| 267 |
|
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|
| 268 |
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static int imxfb_blank(int blank, struct fb_info *info)
|
| 269 |
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{
|
| 270 |
|
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struct imxfb_info *fbi = info->par;
|
| 271 |
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|
|
| 272 |
|
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pr_debug("imxfb_blank: blank=%d\n", blank);
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| 273 |
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|
| 274 |
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switch (blank) {
|
| 275 |
|
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case FB_BLANK_POWERDOWN:
|
| 276 |
|
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case FB_BLANK_VSYNC_SUSPEND:
|
| 277 |
|
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case FB_BLANK_HSYNC_SUSPEND:
|
| 278 |
|
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case FB_BLANK_NORMAL:
|
| 279 |
|
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imxfb_disable_controller(fbi);
|
| 280 |
|
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break;
|
| 281 |
|
|
|
| 282 |
|
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case FB_BLANK_UNBLANK:
|
| 283 |
|
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imxfb_enable_controller(fbi);
|
| 284 |
|
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break;
|
| 285 |
|
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}
|
| 286 |
|
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return 0;
|
| 287 |
|
|
}
|
| 288 |
|
|
|
| 289 |
|
|
static struct fb_ops imxfb_ops = {
|
| 290 |
|
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.owner = THIS_MODULE,
|
| 291 |
|
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.fb_check_var = imxfb_check_var,
|
| 292 |
|
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.fb_set_par = imxfb_set_par,
|
| 293 |
|
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.fb_setcolreg = imxfb_setcolreg,
|
| 294 |
|
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.fb_fillrect = cfb_fillrect,
|
| 295 |
|
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.fb_copyarea = cfb_copyarea,
|
| 296 |
|
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.fb_imageblit = cfb_imageblit,
|
| 297 |
|
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.fb_blank = imxfb_blank,
|
| 298 |
|
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};
|
| 299 |
|
|
|
| 300 |
|
|
/*
|
| 301 |
|
|
* imxfb_activate_var():
|
| 302 |
|
|
* Configures LCD Controller based on entries in var parameter. Settings are
|
| 303 |
|
|
* only written to the controller if changes were made.
|
| 304 |
|
|
*/
|
| 305 |
|
|
static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *info)
|
| 306 |
|
|
{
|
| 307 |
|
|
struct imxfb_info *fbi = info->par;
|
| 308 |
|
|
pr_debug("var: xres=%d hslen=%d lm=%d rm=%d\n",
|
| 309 |
|
|
var->xres, var->hsync_len,
|
| 310 |
|
|
var->left_margin, var->right_margin);
|
| 311 |
|
|
pr_debug("var: yres=%d vslen=%d um=%d bm=%d\n",
|
| 312 |
|
|
var->yres, var->vsync_len,
|
| 313 |
|
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var->upper_margin, var->lower_margin);
|
| 314 |
|
|
|
| 315 |
|
|
#if DEBUG_VAR
|
| 316 |
|
|
if (var->xres < 16 || var->xres > 1024)
|
| 317 |
|
|
printk(KERN_ERR "%s: invalid xres %d\n",
|
| 318 |
|
|
info->fix.id, var->xres);
|
| 319 |
|
|
if (var->hsync_len < 1 || var->hsync_len > 64)
|
| 320 |
|
|
printk(KERN_ERR "%s: invalid hsync_len %d\n",
|
| 321 |
|
|
info->fix.id, var->hsync_len);
|
| 322 |
|
|
if (var->left_margin > 255)
|
| 323 |
|
|
printk(KERN_ERR "%s: invalid left_margin %d\n",
|
| 324 |
|
|
info->fix.id, var->left_margin);
|
| 325 |
|
|
if (var->right_margin > 255)
|
| 326 |
|
|
printk(KERN_ERR "%s: invalid right_margin %d\n",
|
| 327 |
|
|
info->fix.id, var->right_margin);
|
| 328 |
|
|
if (var->yres < 1 || var->yres > 511)
|
| 329 |
|
|
printk(KERN_ERR "%s: invalid yres %d\n",
|
| 330 |
|
|
info->fix.id, var->yres);
|
| 331 |
|
|
if (var->vsync_len > 100)
|
| 332 |
|
|
printk(KERN_ERR "%s: invalid vsync_len %d\n",
|
| 333 |
|
|
info->fix.id, var->vsync_len);
|
| 334 |
|
|
if (var->upper_margin > 63)
|
| 335 |
|
|
printk(KERN_ERR "%s: invalid upper_margin %d\n",
|
| 336 |
|
|
info->fix.id, var->upper_margin);
|
| 337 |
|
|
if (var->lower_margin > 255)
|
| 338 |
|
|
printk(KERN_ERR "%s: invalid lower_margin %d\n",
|
| 339 |
|
|
info->fix.id, var->lower_margin);
|
| 340 |
|
|
#endif
|
| 341 |
|
|
|
| 342 |
|
|
LCDC_HCR = HCR_H_WIDTH(var->hsync_len) |
|
| 343 |
|
|
HCR_H_WAIT_1(var->left_margin) |
|
| 344 |
|
|
HCR_H_WAIT_2(var->right_margin);
|
| 345 |
|
|
|
| 346 |
|
|
LCDC_VCR = VCR_V_WIDTH(var->vsync_len) |
|
| 347 |
|
|
VCR_V_WAIT_1(var->upper_margin) |
|
| 348 |
|
|
VCR_V_WAIT_2(var->lower_margin);
|
| 349 |
|
|
|
| 350 |
|
|
LCDC_SIZE = SIZE_XMAX(var->xres) | SIZE_YMAX(var->yres);
|
| 351 |
|
|
LCDC_PCR = fbi->pcr;
|
| 352 |
|
|
LCDC_PWMR = fbi->pwmr;
|
| 353 |
|
|
LCDC_LSCR1 = fbi->lscr1;
|
| 354 |
|
|
LCDC_DMACR = fbi->dmacr;
|
| 355 |
|
|
|
| 356 |
|
|
return 0;
|
| 357 |
|
|
}
|
| 358 |
|
|
|
| 359 |
|
|
static void imxfb_setup_gpio(struct imxfb_info *fbi)
|
| 360 |
|
|
{
|
| 361 |
|
|
int width;
|
| 362 |
|
|
|
| 363 |
|
|
LCDC_RMCR &= ~(RMCR_LCDC_EN | RMCR_SELF_REF);
|
| 364 |
|
|
|
| 365 |
|
|
if( fbi->pcr & PCR_TFT )
|
| 366 |
|
|
width = 16;
|
| 367 |
|
|
else
|
| 368 |
|
|
width = 1 << ((fbi->pcr >> 28) & 0x3);
|
| 369 |
|
|
|
| 370 |
|
|
switch(width) {
|
| 371 |
|
|
case 16:
|
| 372 |
|
|
imx_gpio_mode(PD30_PF_LD15);
|
| 373 |
|
|
imx_gpio_mode(PD29_PF_LD14);
|
| 374 |
|
|
imx_gpio_mode(PD28_PF_LD13);
|
| 375 |
|
|
imx_gpio_mode(PD27_PF_LD12);
|
| 376 |
|
|
imx_gpio_mode(PD26_PF_LD11);
|
| 377 |
|
|
imx_gpio_mode(PD25_PF_LD10);
|
| 378 |
|
|
imx_gpio_mode(PD24_PF_LD9);
|
| 379 |
|
|
imx_gpio_mode(PD23_PF_LD8);
|
| 380 |
|
|
case 8:
|
| 381 |
|
|
imx_gpio_mode(PD22_PF_LD7);
|
| 382 |
|
|
imx_gpio_mode(PD21_PF_LD6);
|
| 383 |
|
|
imx_gpio_mode(PD20_PF_LD5);
|
| 384 |
|
|
imx_gpio_mode(PD19_PF_LD4);
|
| 385 |
|
|
case 4:
|
| 386 |
|
|
imx_gpio_mode(PD18_PF_LD3);
|
| 387 |
|
|
imx_gpio_mode(PD17_PF_LD2);
|
| 388 |
|
|
case 2:
|
| 389 |
|
|
imx_gpio_mode(PD16_PF_LD1);
|
| 390 |
|
|
case 1:
|
| 391 |
|
|
imx_gpio_mode(PD15_PF_LD0);
|
| 392 |
|
|
}
|
| 393 |
|
|
|
| 394 |
|
|
/* initialize GPIOs */
|
| 395 |
|
|
imx_gpio_mode(PD6_PF_LSCLK);
|
| 396 |
|
|
imx_gpio_mode(PD11_PF_CONTRAST);
|
| 397 |
|
|
imx_gpio_mode(PD14_PF_FLM_VSYNC);
|
| 398 |
|
|
imx_gpio_mode(PD13_PF_LP_HSYNC);
|
| 399 |
|
|
imx_gpio_mode(PD12_PF_ACD_OE);
|
| 400 |
|
|
|
| 401 |
|
|
/* These are only needed for Sharp HR TFT displays */
|
| 402 |
|
|
if (fbi->pcr & PCR_SHARP) {
|
| 403 |
|
|
imx_gpio_mode(PD7_PF_REV);
|
| 404 |
|
|
imx_gpio_mode(PD8_PF_CLS);
|
| 405 |
|
|
imx_gpio_mode(PD9_PF_PS);
|
| 406 |
|
|
imx_gpio_mode(PD10_PF_SPL_SPR);
|
| 407 |
|
|
}
|
| 408 |
|
|
}
|
| 409 |
|
|
|
| 410 |
|
|
#ifdef CONFIG_PM
|
| 411 |
|
|
/*
|
| 412 |
|
|
* Power management hooks. Note that we won't be called from IRQ context,
|
| 413 |
|
|
* unlike the blank functions above, so we may sleep.
|
| 414 |
|
|
*/
|
| 415 |
|
|
static int imxfb_suspend(struct platform_device *dev, pm_message_t state)
|
| 416 |
|
|
{
|
| 417 |
|
|
struct imxfb_info *fbi = platform_get_drvdata(dev);
|
| 418 |
|
|
pr_debug("%s\n",__FUNCTION__);
|
| 419 |
|
|
|
| 420 |
|
|
imxfb_disable_controller(fbi);
|
| 421 |
|
|
return 0;
|
| 422 |
|
|
}
|
| 423 |
|
|
|
| 424 |
|
|
static int imxfb_resume(struct platform_device *dev)
|
| 425 |
|
|
{
|
| 426 |
|
|
struct imxfb_info *fbi = platform_get_drvdata(dev);
|
| 427 |
|
|
pr_debug("%s\n",__FUNCTION__);
|
| 428 |
|
|
|
| 429 |
|
|
imxfb_enable_controller(fbi);
|
| 430 |
|
|
return 0;
|
| 431 |
|
|
}
|
| 432 |
|
|
#else
|
| 433 |
|
|
#define imxfb_suspend NULL
|
| 434 |
|
|
#define imxfb_resume NULL
|
| 435 |
|
|
#endif
|
| 436 |
|
|
|
| 437 |
|
|
static int __init imxfb_init_fbinfo(struct device *dev)
|
| 438 |
|
|
{
|
| 439 |
|
|
struct imxfb_mach_info *inf = dev->platform_data;
|
| 440 |
|
|
struct fb_info *info = dev_get_drvdata(dev);
|
| 441 |
|
|
struct imxfb_info *fbi = info->par;
|
| 442 |
|
|
|
| 443 |
|
|
pr_debug("%s\n",__FUNCTION__);
|
| 444 |
|
|
|
| 445 |
|
|
info->pseudo_palette = kmalloc( sizeof(u32) * 16, GFP_KERNEL);
|
| 446 |
|
|
if (!info->pseudo_palette)
|
| 447 |
|
|
return -ENOMEM;
|
| 448 |
|
|
|
| 449 |
|
|
memset(fbi, 0, sizeof(struct imxfb_info));
|
| 450 |
|
|
fbi->dev = dev;
|
| 451 |
|
|
|
| 452 |
|
|
strlcpy(info->fix.id, IMX_NAME, sizeof(info->fix.id));
|
| 453 |
|
|
|
| 454 |
|
|
info->fix.type = FB_TYPE_PACKED_PIXELS;
|
| 455 |
|
|
info->fix.type_aux = 0;
|
| 456 |
|
|
info->fix.xpanstep = 0;
|
| 457 |
|
|
info->fix.ypanstep = 0;
|
| 458 |
|
|
info->fix.ywrapstep = 0;
|
| 459 |
|
|
info->fix.accel = FB_ACCEL_NONE;
|
| 460 |
|
|
|
| 461 |
|
|
info->var.nonstd = 0;
|
| 462 |
|
|
info->var.activate = FB_ACTIVATE_NOW;
|
| 463 |
|
|
info->var.height = -1;
|
| 464 |
|
|
info->var.width = -1;
|
| 465 |
|
|
info->var.accel_flags = 0;
|
| 466 |
|
|
info->var.vmode = FB_VMODE_NONINTERLACED;
|
| 467 |
|
|
|
| 468 |
|
|
info->fbops = &imxfb_ops;
|
| 469 |
|
|
info->flags = FBINFO_FLAG_DEFAULT | FBINFO_READS_FAST;
|
| 470 |
|
|
|
| 471 |
|
|
fbi->rgb[RGB_16] = &def_rgb_16;
|
| 472 |
|
|
fbi->rgb[RGB_8] = &def_rgb_8;
|
| 473 |
|
|
|
| 474 |
|
|
fbi->max_xres = inf->xres;
|
| 475 |
|
|
info->var.xres = inf->xres;
|
| 476 |
|
|
info->var.xres_virtual = inf->xres;
|
| 477 |
|
|
fbi->max_yres = inf->yres;
|
| 478 |
|
|
info->var.yres = inf->yres;
|
| 479 |
|
|
info->var.yres_virtual = inf->yres;
|
| 480 |
|
|
fbi->max_bpp = inf->bpp;
|
| 481 |
|
|
info->var.bits_per_pixel = inf->bpp;
|
| 482 |
|
|
info->var.nonstd = inf->nonstd;
|
| 483 |
|
|
info->var.pixclock = inf->pixclock;
|
| 484 |
|
|
info->var.hsync_len = inf->hsync_len;
|
| 485 |
|
|
info->var.left_margin = inf->left_margin;
|
| 486 |
|
|
info->var.right_margin = inf->right_margin;
|
| 487 |
|
|
info->var.vsync_len = inf->vsync_len;
|
| 488 |
|
|
info->var.upper_margin = inf->upper_margin;
|
| 489 |
|
|
info->var.lower_margin = inf->lower_margin;
|
| 490 |
|
|
info->var.sync = inf->sync;
|
| 491 |
|
|
info->var.grayscale = inf->cmap_greyscale;
|
| 492 |
|
|
fbi->cmap_inverse = inf->cmap_inverse;
|
| 493 |
|
|
fbi->cmap_static = inf->cmap_static;
|
| 494 |
|
|
fbi->pcr = inf->pcr;
|
| 495 |
|
|
fbi->lscr1 = inf->lscr1;
|
| 496 |
|
|
fbi->dmacr = inf->dmacr;
|
| 497 |
|
|
fbi->pwmr = inf->pwmr;
|
| 498 |
|
|
fbi->lcd_power = inf->lcd_power;
|
| 499 |
|
|
fbi->backlight_power = inf->backlight_power;
|
| 500 |
|
|
info->fix.smem_len = fbi->max_xres * fbi->max_yres *
|
| 501 |
|
|
fbi->max_bpp / 8;
|
| 502 |
|
|
|
| 503 |
|
|
return 0;
|
| 504 |
|
|
}
|
| 505 |
|
|
|
| 506 |
|
|
/*
|
| 507 |
|
|
* Allocates the DRAM memory for the frame buffer. This buffer is
|
| 508 |
|
|
* remapped into a non-cached, non-buffered, memory region to
|
| 509 |
|
|
* allow pixel writes to occur without flushing the cache.
|
| 510 |
|
|
* Once this area is remapped, all virtual memory access to the
|
| 511 |
|
|
* video memory should occur at the new region.
|
| 512 |
|
|
*/
|
| 513 |
|
|
static int __init imxfb_map_video_memory(struct fb_info *info)
|
| 514 |
|
|
{
|
| 515 |
|
|
struct imxfb_info *fbi = info->par;
|
| 516 |
|
|
|
| 517 |
|
|
fbi->map_size = PAGE_ALIGN(info->fix.smem_len);
|
| 518 |
|
|
fbi->map_cpu = dma_alloc_writecombine(fbi->dev, fbi->map_size,
|
| 519 |
|
|
&fbi->map_dma,GFP_KERNEL);
|
| 520 |
|
|
|
| 521 |
|
|
if (fbi->map_cpu) {
|
| 522 |
|
|
info->screen_base = fbi->map_cpu;
|
| 523 |
|
|
fbi->screen_cpu = fbi->map_cpu;
|
| 524 |
|
|
fbi->screen_dma = fbi->map_dma;
|
| 525 |
|
|
info->fix.smem_start = fbi->screen_dma;
|
| 526 |
|
|
}
|
| 527 |
|
|
|
| 528 |
|
|
return fbi->map_cpu ? 0 : -ENOMEM;
|
| 529 |
|
|
}
|
| 530 |
|
|
|
| 531 |
|
|
static int __init imxfb_probe(struct platform_device *pdev)
|
| 532 |
|
|
{
|
| 533 |
|
|
struct imxfb_info *fbi;
|
| 534 |
|
|
struct fb_info *info;
|
| 535 |
|
|
struct imxfb_mach_info *inf;
|
| 536 |
|
|
struct resource *res;
|
| 537 |
|
|
int ret;
|
| 538 |
|
|
|
| 539 |
|
|
printk("i.MX Framebuffer driver\n");
|
| 540 |
|
|
|
| 541 |
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
| 542 |
|
|
if(!res)
|
| 543 |
|
|
return -ENODEV;
|
| 544 |
|
|
|
| 545 |
|
|
inf = pdev->dev.platform_data;
|
| 546 |
|
|
if(!inf) {
|
| 547 |
|
|
dev_err(&pdev->dev,"No platform_data available\n");
|
| 548 |
|
|
return -ENOMEM;
|
| 549 |
|
|
}
|
| 550 |
|
|
|
| 551 |
|
|
info = framebuffer_alloc(sizeof(struct imxfb_info), &pdev->dev);
|
| 552 |
|
|
if(!info)
|
| 553 |
|
|
return -ENOMEM;
|
| 554 |
|
|
|
| 555 |
|
|
fbi = info->par;
|
| 556 |
|
|
|
| 557 |
|
|
platform_set_drvdata(pdev, info);
|
| 558 |
|
|
|
| 559 |
|
|
ret = imxfb_init_fbinfo(&pdev->dev);
|
| 560 |
|
|
if( ret < 0 )
|
| 561 |
|
|
goto failed_init;
|
| 562 |
|
|
|
| 563 |
|
|
res = request_mem_region(res->start, res->end - res->start + 1, "IMXFB");
|
| 564 |
|
|
if (!res) {
|
| 565 |
|
|
ret = -EBUSY;
|
| 566 |
|
|
goto failed_regs;
|
| 567 |
|
|
}
|
| 568 |
|
|
|
| 569 |
|
|
if (!inf->fixed_screen_cpu) {
|
| 570 |
|
|
ret = imxfb_map_video_memory(info);
|
| 571 |
|
|
if (ret) {
|
| 572 |
|
|
dev_err(&pdev->dev, "Failed to allocate video RAM: %d\n", ret);
|
| 573 |
|
|
ret = -ENOMEM;
|
| 574 |
|
|
goto failed_map;
|
| 575 |
|
|
}
|
| 576 |
|
|
} else {
|
| 577 |
|
|
/* Fixed framebuffer mapping enables location of the screen in eSRAM */
|
| 578 |
|
|
fbi->map_cpu = inf->fixed_screen_cpu;
|
| 579 |
|
|
fbi->map_dma = inf->fixed_screen_dma;
|
| 580 |
|
|
info->screen_base = fbi->map_cpu;
|
| 581 |
|
|
fbi->screen_cpu = fbi->map_cpu;
|
| 582 |
|
|
fbi->screen_dma = fbi->map_dma;
|
| 583 |
|
|
info->fix.smem_start = fbi->screen_dma;
|
| 584 |
|
|
}
|
| 585 |
|
|
|
| 586 |
|
|
/*
|
| 587 |
|
|
* This makes sure that our colour bitfield
|
| 588 |
|
|
* descriptors are correctly initialised.
|
| 589 |
|
|
*/
|
| 590 |
|
|
imxfb_check_var(&info->var, info);
|
| 591 |
|
|
|
| 592 |
|
|
ret = fb_alloc_cmap(&info->cmap, 1<<info->var.bits_per_pixel, 0);
|
| 593 |
|
|
if (ret < 0)
|
| 594 |
|
|
goto failed_cmap;
|
| 595 |
|
|
|
| 596 |
|
|
imxfb_setup_gpio(fbi);
|
| 597 |
|
|
|
| 598 |
|
|
imxfb_set_par(info);
|
| 599 |
|
|
ret = register_framebuffer(info);
|
| 600 |
|
|
if (ret < 0) {
|
| 601 |
|
|
dev_err(&pdev->dev, "failed to register framebuffer\n");
|
| 602 |
|
|
goto failed_register;
|
| 603 |
|
|
}
|
| 604 |
|
|
|
| 605 |
|
|
imxfb_enable_controller(fbi);
|
| 606 |
|
|
|
| 607 |
|
|
return 0;
|
| 608 |
|
|
|
| 609 |
|
|
failed_register:
|
| 610 |
|
|
fb_dealloc_cmap(&info->cmap);
|
| 611 |
|
|
failed_cmap:
|
| 612 |
|
|
if (!inf->fixed_screen_cpu)
|
| 613 |
|
|
dma_free_writecombine(&pdev->dev,fbi->map_size,fbi->map_cpu,
|
| 614 |
|
|
fbi->map_dma);
|
| 615 |
|
|
failed_map:
|
| 616 |
|
|
kfree(info->pseudo_palette);
|
| 617 |
|
|
failed_regs:
|
| 618 |
|
|
release_mem_region(res->start, res->end - res->start);
|
| 619 |
|
|
failed_init:
|
| 620 |
|
|
platform_set_drvdata(pdev, NULL);
|
| 621 |
|
|
framebuffer_release(info);
|
| 622 |
|
|
return ret;
|
| 623 |
|
|
}
|
| 624 |
|
|
|
| 625 |
|
|
static int imxfb_remove(struct platform_device *pdev)
|
| 626 |
|
|
{
|
| 627 |
|
|
struct fb_info *info = platform_get_drvdata(pdev);
|
| 628 |
|
|
struct imxfb_info *fbi = info->par;
|
| 629 |
|
|
struct resource *res;
|
| 630 |
|
|
|
| 631 |
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
| 632 |
|
|
|
| 633 |
|
|
imxfb_disable_controller(fbi);
|
| 634 |
|
|
|
| 635 |
|
|
unregister_framebuffer(info);
|
| 636 |
|
|
|
| 637 |
|
|
fb_dealloc_cmap(&info->cmap);
|
| 638 |
|
|
kfree(info->pseudo_palette);
|
| 639 |
|
|
framebuffer_release(info);
|
| 640 |
|
|
|
| 641 |
|
|
release_mem_region(res->start, res->end - res->start + 1);
|
| 642 |
|
|
platform_set_drvdata(pdev, NULL);
|
| 643 |
|
|
|
| 644 |
|
|
return 0;
|
| 645 |
|
|
}
|
| 646 |
|
|
|
| 647 |
|
|
void imxfb_shutdown(struct platform_device * dev)
|
| 648 |
|
|
{
|
| 649 |
|
|
struct fb_info *info = platform_get_drvdata(dev);
|
| 650 |
|
|
struct imxfb_info *fbi = info->par;
|
| 651 |
|
|
imxfb_disable_controller(fbi);
|
| 652 |
|
|
}
|
| 653 |
|
|
|
| 654 |
|
|
static struct platform_driver imxfb_driver = {
|
| 655 |
|
|
.probe = imxfb_probe,
|
| 656 |
|
|
.suspend = imxfb_suspend,
|
| 657 |
|
|
.resume = imxfb_resume,
|
| 658 |
|
|
.remove = imxfb_remove,
|
| 659 |
|
|
.shutdown = imxfb_shutdown,
|
| 660 |
|
|
.driver = {
|
| 661 |
|
|
.name = "imx-fb",
|
| 662 |
|
|
},
|
| 663 |
|
|
};
|
| 664 |
|
|
|
| 665 |
|
|
int __init imxfb_init(void)
|
| 666 |
|
|
{
|
| 667 |
|
|
return platform_driver_register(&imxfb_driver);
|
| 668 |
|
|
}
|
| 669 |
|
|
|
| 670 |
|
|
static void __exit imxfb_cleanup(void)
|
| 671 |
|
|
{
|
| 672 |
|
|
platform_driver_unregister(&imxfb_driver);
|
| 673 |
|
|
}
|
| 674 |
|
|
|
| 675 |
|
|
module_init(imxfb_init);
|
| 676 |
|
|
module_exit(imxfb_cleanup);
|
| 677 |
|
|
|
| 678 |
|
|
MODULE_DESCRIPTION("Motorola i.MX framebuffer driver");
|
| 679 |
|
|
MODULE_AUTHOR("Sascha Hauer, Pengutronix");
|
| 680 |
|
|
MODULE_LICENSE("GPL");
|
