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>
127 lines
2.5 KiB
C
127 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2013 Atmel Corporation
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* Bo Shen <voice.shen@atmel.com>
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <asm/arch/at91_common.h>
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#include <asm/arch/at91_pit.h>
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#include <asm/arch/at91_pmc.h>
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#include <asm/arch/at91_rstc.h>
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#include <asm/arch/at91_wdt.h>
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#include <asm/arch/clk.h>
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#include <spl.h>
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static void switch_to_main_crystal_osc(void)
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{
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struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
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u32 tmp;
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tmp = readl(&pmc->mor);
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tmp &= ~AT91_PMC_MOR_OSCOUNT(0xff);
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tmp &= ~AT91_PMC_MOR_KEY(0xff);
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tmp |= AT91_PMC_MOR_MOSCEN;
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tmp |= AT91_PMC_MOR_OSCOUNT(8);
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tmp |= AT91_PMC_MOR_KEY(0x37);
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writel(tmp, &pmc->mor);
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while (!(readl(&pmc->sr) & AT91_PMC_IXR_MOSCS))
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;
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#if defined(CONFIG_SAMA5D2)
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/* Enable a measurement of the external oscillator */
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tmp = readl(&pmc->mcfr);
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tmp |= AT91_PMC_MCFR_CCSS_XTAL_OSC;
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tmp |= AT91_PMC_MCFR_RCMEAS;
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writel(tmp, &pmc->mcfr);
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while (!(readl(&pmc->mcfr) & AT91_PMC_MCFR_MAINRDY))
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;
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if (!(readl(&pmc->mcfr) & AT91_PMC_MCFR_MAINF_MASK))
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hang();
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#endif
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tmp = readl(&pmc->mor);
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tmp &= ~AT91_PMC_MOR_OSCBYPASS;
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tmp &= ~AT91_PMC_MOR_KEY(0xff);
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tmp |= AT91_PMC_MOR_KEY(0x37);
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writel(tmp, &pmc->mor);
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tmp = readl(&pmc->mor);
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tmp |= AT91_PMC_MOR_MOSCSEL;
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tmp &= ~AT91_PMC_MOR_KEY(0xff);
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tmp |= AT91_PMC_MOR_KEY(0x37);
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writel(tmp, &pmc->mor);
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while (!(readl(&pmc->sr) & AT91_PMC_IXR_MOSCSELS))
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;
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#if !defined(CONFIG_SAMA5D2)
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/* Wait until MAINRDY field is set to make sure main clock is stable */
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while (!(readl(&pmc->mcfr) & AT91_PMC_MAINRDY))
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;
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#endif
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#if !defined(CONFIG_SAMA5D4) && !defined(CONFIG_SAMA5D2)
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tmp = readl(&pmc->mor);
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tmp &= ~AT91_PMC_MOR_MOSCRCEN;
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tmp &= ~AT91_PMC_MOR_KEY(0xff);
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tmp |= AT91_PMC_MOR_KEY(0x37);
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writel(tmp, &pmc->mor);
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#endif
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}
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__weak void matrix_init(void)
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{
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/* This only be used for sama5d4 soc now */
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}
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__weak void redirect_int_from_saic_to_aic(void)
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{
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/* This only be used for sama5d4 soc now */
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}
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/* empty stub to satisfy current lowlevel_init, can be removed any time */
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void s_init(void)
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{
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}
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void board_init_f(ulong dummy)
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{
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int ret;
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switch_to_main_crystal_osc();
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#ifdef CONFIG_SAMA5D2
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configure_2nd_sram_as_l2_cache();
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#endif
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/* disable watchdog */
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at91_disable_wdt();
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/* PMC configuration */
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at91_pmc_init();
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at91_clock_init(CONFIG_SYS_AT91_MAIN_CLOCK);
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matrix_init();
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redirect_int_from_saic_to_aic();
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timer_init();
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board_early_init_f();
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mem_init();
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ret = spl_init();
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if (ret) {
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debug("spl_init() failed: %d\n", ret);
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hang();
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}
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preloader_console_init();
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}
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