Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / u-boot / arch / arm / cpu / at91-common / spl.c

diff --git a/qemu/roms/u-boot/arch/arm/cpu/at91-common/spl.c b/qemu/roms/u-boot/arch/arm/cpu/at91-common/spl.c
new file mode 100644 (file)
index 0000000..7f4debb
--- /dev/null
+++ b/qemu/roms/u-boot/arch/arm/cpu/at91-common/spl.c
@@ -0,0 +1,94 @@
+/*
+ * 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_pmc.h>
+#include <asm/arch/at91_wdt.h>
+#include <asm/arch/clk.h>
+#include <spl.h>
+
+static void at91_disable_wdt(void)
+{
+       struct at91_wdt *wdt = (struct at91_wdt *)ATMEL_BASE_WDT;
+
+       writel(AT91_WDT_MR_WDDIS, &wdt->mr);
+}
+
+void at91_plla_init(u32 pllar)
+{
+       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+
+       writel(pllar, &pmc->pllar);
+       while (!(readl(&pmc->sr) & (AT91_PMC_LOCKA | AT91_PMC_MCKRDY)))
+               ;
+}
+
+void at91_mck_init(u32 mckr)
+{
+       struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
+       u32 tmp;
+
+       tmp = readl(&pmc->mckr);
+       tmp &= ~(AT91_PMC_MCKR_PRES_MASK |
+                AT91_PMC_MCKR_MDIV_MASK |
+                AT91_PMC_MCKR_PLLADIV_2);
+       tmp |= mckr & (AT91_PMC_MCKR_PRES_MASK |
+                      AT91_PMC_MCKR_MDIV_MASK |
+                      AT91_PMC_MCKR_PLLADIV_2);
+       writel(tmp, &pmc->mckr);
+
+       while (!(readl(&pmc->sr) & AT91_PMC_MCKRDY))
+               ;
+}
+
+
+u32 spl_boot_device(void)
+{
+#ifdef CONFIG_SYS_USE_MMC
+       return BOOT_DEVICE_MMC1;
+#elif CONFIG_SYS_USE_NANDFLASH
+       return BOOT_DEVICE_NAND;
+#elif CONFIG_SYS_USE_SERIALFLASH
+       return BOOT_DEVICE_SPI;
+#endif
+       return BOOT_DEVICE_NONE;
+}
+
+u32 spl_boot_mode(void)
+{
+       switch (spl_boot_device()) {
+#ifdef CONFIG_SYS_USE_MMC
+       case BOOT_DEVICE_MMC1:
+               return MMCSD_MODE_FAT;
+               break;
+#endif
+       case BOOT_DEVICE_NONE:
+       default:
+               hang();
+       }
+}
+
+void s_init(void)
+{
+       /* 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();
+}