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MPC5121 DIU configuration/setup as initialized by the boot loader currently will get lost while booting Linux. As a result displaying the boot splash is not possible through the boot process. To prevent this we reserve configured DIU frame buffer address range while booting and preserve AOI descriptor and gamma table so that DIU continues displaying through the whole boot process. On first open from user space DIU frame buffer driver releases the reserved frame buffer area and continues to operate as usual. Signed-off-by: John Rigby <jcrigby@gmail.com> Signed-off-by: Anatolij Gustschin <agust@denx.de> Acked-by: Timur Tabi <timur@freescale.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
75 lines
1.7 KiB
C
75 lines
1.7 KiB
C
/*
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* Copyright (C) 2007, 2008 Freescale Semiconductor, Inc. All rights reserved.
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*
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* Author: John Rigby, <jrigby@freescale.com>, Thur Mar 29 2007
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*
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* Description:
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* MPC5121 ADS board setup
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*
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* This is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/io.h>
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#include <linux/of_platform.h>
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#include <asm/machdep.h>
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#include <asm/ipic.h>
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#include <asm/prom.h>
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#include <asm/time.h>
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#include <sysdev/fsl_pci.h>
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#include "mpc512x.h"
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#include "mpc5121_ads.h"
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static void __init mpc5121_ads_setup_arch(void)
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{
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#ifdef CONFIG_PCI
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struct device_node *np;
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#endif
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printk(KERN_INFO "MPC5121 ADS board from Freescale Semiconductor\n");
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/*
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* cpld regs are needed early
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*/
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mpc5121_ads_cpld_map();
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#ifdef CONFIG_PCI
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for_each_compatible_node(np, "pci", "fsl,mpc5121-pci")
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mpc83xx_add_bridge(np);
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#endif
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mpc512x_setup_diu();
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}
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static void __init mpc5121_ads_init_IRQ(void)
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{
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mpc512x_init_IRQ();
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mpc5121_ads_cpld_pic_init();
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}
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/*
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* Called very early, MMU is off, device-tree isn't unflattened
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*/
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static int __init mpc5121_ads_probe(void)
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{
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unsigned long root = of_get_flat_dt_root();
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return of_flat_dt_is_compatible(root, "fsl,mpc5121ads");
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}
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define_machine(mpc5121_ads) {
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.name = "MPC5121 ADS",
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.probe = mpc5121_ads_probe,
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.setup_arch = mpc5121_ads_setup_arch,
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.init = mpc512x_init,
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.init_early = mpc512x_init_diu,
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.init_IRQ = mpc5121_ads_init_IRQ,
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.get_irq = ipic_get_irq,
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.calibrate_decr = generic_calibrate_decr,
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.restart = mpc512x_restart,
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};
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