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| author | Heiko Schocher <hs@denx.de> | 2014-10-31 08:31:04 +0100 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2014-11-17 08:47:17 -0500 |
| commit | 5abc00d02082056765a8029675e7b05ab6c35263 (patch) | |
| tree | 381ca30258c8bcc82372e99ba2f903b9a74492c7 /arch/arm/cpu/at91-common/spl_atmel.c | |
| parent | 667af36905157b65fd79493e7f821db606ebbd33 (diff) | |
| download | u-boot-imx-5abc00d02082056765a8029675e7b05ab6c35263.zip u-boot-imx-5abc00d02082056765a8029675e7b05ab6c35263.tar.gz u-boot-imx-5abc00d02082056765a8029675e7b05ab6c35263.tar.bz2 | |
arm, spl, at91: add at91sam9260 and at91sam9g45 spl support
add support for using spl code on at91sam9260 and at91sam9g45
based boards.
Signed-off-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Bo Shen <voice.shen@atmel.com>
Reviewed-by: Andreas Bießmann <andreas.devel@googlemail.com>
[adopt Bo's change in spl.c]
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
Diffstat (limited to 'arch/arm/cpu/at91-common/spl_atmel.c')
| -rw-r--r-- | arch/arm/cpu/at91-common/spl_atmel.c | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/arch/arm/cpu/at91-common/spl_atmel.c b/arch/arm/cpu/at91-common/spl_atmel.c new file mode 100644 index 0000000..7297530 --- /dev/null +++ b/arch/arm/cpu/at91-common/spl_atmel.c @@ -0,0 +1,80 @@ +/* + * Copyright (C) 2013 Atmel Corporation + * Bo Shen <voice.shen@atmel.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/at91_common.h> +#include <asm/arch/at91_pit.h> +#include <asm/arch/at91_pmc.h> +#include <asm/arch/at91_rstc.h> +#include <asm/arch/at91_wdt.h> +#include <asm/arch/clk.h> +#include <spl.h> + +DECLARE_GLOBAL_DATA_PTR; + +static void switch_to_main_crystal_osc(void) +{ + struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC; + u32 tmp; + + tmp = readl(&pmc->mor); + tmp &= ~AT91_PMC_MOR_OSCOUNT(0xff); + tmp &= ~AT91_PMC_MOR_KEY(0xff); + tmp |= AT91_PMC_MOR_MOSCEN; + tmp |= AT91_PMC_MOR_OSCOUNT(8); + tmp |= AT91_PMC_MOR_KEY(0x37); + writel(tmp, &pmc->mor); + while (!(readl(&pmc->sr) & AT91_PMC_IXR_MOSCS)) + ; + + tmp = readl(&pmc->mor); + tmp &= ~AT91_PMC_MOR_OSCBYPASS; + tmp &= ~AT91_PMC_MOR_KEY(0xff); + tmp |= AT91_PMC_MOR_KEY(0x37); + writel(tmp, &pmc->mor); + + tmp = readl(&pmc->mor); + tmp |= AT91_PMC_MOR_MOSCSEL; + tmp &= ~AT91_PMC_MOR_KEY(0xff); + tmp |= AT91_PMC_MOR_KEY(0x37); + writel(tmp, &pmc->mor); + + while (!(readl(&pmc->sr) & AT91_PMC_IXR_MOSCSELS)) + ; + + /* Wait until MAINRDY field is set to make sure main clock is stable */ + while (!(readl(&pmc->mcfr) & AT91_PMC_MAINRDY)) + ; + + tmp = readl(&pmc->mor); + tmp &= ~AT91_PMC_MOR_MOSCRCEN; + tmp &= ~AT91_PMC_MOR_KEY(0xff); + tmp |= AT91_PMC_MOR_KEY(0x37); + writel(tmp, &pmc->mor); +} + +void s_init(void) +{ + switch_to_main_crystal_osc(); + + /* disable watchdog */ + at91_disable_wdt(); + + /* PMC configuration */ + at91_pmc_init(); + + at91_clock_init(CONFIG_SYS_AT91_MAIN_CLOCK); + + timer_init(); + + board_early_init_f(); + + preloader_console_init(); + + mem_init(); +} |