mirror of
https://github.com/AsahiLinux/u-boot
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
128 lines
2.9 KiB
C
128 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2000-2003
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* Copyright (C) 2004-2007, 2012 Freescale Semiconductor, Inc.
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* Hayden Fraser (Hayden.Fraser@freescale.com)
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*/
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#include <common.h>
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#include <asm/immap.h>
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#include <asm/io.h>
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DECLARE_GLOBAL_DATA_PTR;
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int checkboard(void)
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{
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puts("Board: ");
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puts("Freescale MCF5253 EVBE\n");
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return 0;
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};
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int dram_init(void)
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{
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/*
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* Check to see if the SDRAM has already been initialized
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* by a run control tool
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*/
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if (!(mbar_readLong(MCFSIM_DCR) & 0x8000)) {
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u32 RC, dramsize;
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RC = (CONFIG_SYS_CLK / 1000000) >> 1;
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RC = (RC * 15) >> 4;
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/* Initialize DRAM Control Register: DCR */
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mbar_writeShort(MCFSIM_DCR, (0x8400 | RC));
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asm("nop");
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mbar_writeLong(MCFSIM_DACR0, 0x00002320);
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asm("nop");
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/* Initialize DMR0 */
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dramsize = ((CONFIG_SYS_SDRAM_SIZE << 20) - 1) & 0xFFFC0000;
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mbar_writeLong(MCFSIM_DMR0, dramsize | 1);
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asm("nop");
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mbar_writeLong(MCFSIM_DACR0, 0x00002328);
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asm("nop");
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/* Write to this block to initiate precharge */
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*(u32 *) (CONFIG_SYS_SDRAM_BASE) = 0xa5a5a5a5;
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asm("nop");
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/* Set RE bit in DACR */
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mbar_writeLong(MCFSIM_DACR0,
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mbar_readLong(MCFSIM_DACR0) | 0x8000);
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asm("nop");
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/* Wait for at least 8 auto refresh cycles to occur */
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udelay(500);
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/* Finish the configuration by issuing the MRS */
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mbar_writeLong(MCFSIM_DACR0,
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mbar_readLong(MCFSIM_DACR0) | 0x0040);
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asm("nop");
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*(u32 *) (CONFIG_SYS_SDRAM_BASE + 0x800) = 0xa5a5a5a5;
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}
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gd->ram_size = CONFIG_SYS_SDRAM_SIZE * 1024 * 1024;
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return 0;
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}
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int testdram(void)
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{
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/* TODO: XXX XXX XXX */
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printf("DRAM test not implemented!\n");
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return (0);
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}
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#ifdef CONFIG_IDE
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#include <ata.h>
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int ide_preinit(void)
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{
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return (0);
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}
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void ide_set_reset(int idereset)
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{
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atac_t *ata = (atac_t *) CONFIG_SYS_ATA_BASE_ADDR;
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long period;
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/* t1, t2, t3, t4, t5, t6, t9, tRD, tA */
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int piotms[5][9] = { {70, 165, 60, 30, 50, 5, 20, 0, 35}, /* PIO 0 */
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{50, 125, 45, 20, 35, 5, 15, 0, 35}, /* PIO 1 */
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{30, 100, 30, 15, 20, 5, 10, 0, 35}, /* PIO 2 */
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{30, 80, 30, 10, 20, 5, 10, 0, 35}, /* PIO 3 */
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{25, 70, 20, 10, 20, 5, 10, 0, 35} /* PIO 4 */
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};
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if (idereset) {
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/* control reset */
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out_8(&ata->cr, 0);
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udelay(100);
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} else {
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mbar2_writeLong(CIM_MISCCR, CIM_MISCCR_CPUEND);
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#define CALC_TIMING(t) (t + period - 1) / period
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period = 1000000000 / (CONFIG_SYS_CLK / 2); /* period in ns */
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/*ata->ton = CALC_TIMING (180); */
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out_8(&ata->t1, CALC_TIMING(piotms[2][0]));
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out_8(&ata->t2w, CALC_TIMING(piotms[2][1]));
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out_8(&ata->t2r, CALC_TIMING(piotms[2][1]));
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out_8(&ata->ta, CALC_TIMING(piotms[2][8]));
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out_8(&ata->trd, CALC_TIMING(piotms[2][7]));
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out_8(&ata->t4, CALC_TIMING(piotms[2][3]));
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out_8(&ata->t9, CALC_TIMING(piotms[2][6]));
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/* IORDY enable */
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out_8(&ata->cr, 0x40);
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udelay(2000);
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/* IORDY enable */
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setbits_8(&ata->cr, 0x01);
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}
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}
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#endif /* CONFIG_IDE */
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