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>
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();
+}