1 files changed, 134 insertions, 0 deletions
diff --git a/arch/arm/boards/vscom-baltos/lowlevel.c b/arch/arm/boards/vscom-baltos/lowlevel.c
new file mode 100644
index 0000000000..8bce91a938
--- /dev/null
+++ b/arch/arm/boards/vscom-baltos/lowlevel.c
@@ -0,0 +1,134 @@
+#include <common.h>
+#include <init.h>
+#include <linux/sizes.h>
+#include <io.h>
+#include <linux/string.h>
+#include <debug_ll.h>
+#include <asm/barebox-arm-head.h>
+#include <asm/barebox-arm.h>
+#include <mach/am33xx-silicon.h>
+#include <mach/am33xx-clock.h>
+#include <mach/generic.h>
+#include <mach/sdrc.h>
+#include <mach/sys_info.h>
+#include <mach/syslib.h>
+#include <mach/am33xx-mux.h>
+#include <mach/am33xx-generic.h>
+#include <mach/wdt.h>
+
+static const struct am33xx_ddr_data ddr3_data = {
+	.rd_slave_ratio0        = 0x38,
+	.wr_dqs_slave_ratio0    = 0x44,
+	.fifo_we_slave_ratio0	= 0x94,
+	.wr_slave_ratio0        = 0x7D,
+	.use_rank0_delay	= 0x01,
+	.dll_lock_diff0		= 0x0,
+};
+
+static const struct am33xx_cmd_control ddr3_cmd_ctrl = {
+	.slave_ratio0	= 0x80,
+	.dll_lock_diff0	= 0x1,
+	.invert_clkout0	= 0x0,
+	.slave_ratio1	= 0x80,
+	.dll_lock_diff1	= 0x1,
+	.invert_clkout1	= 0x0,
+	.slave_ratio2	= 0x80,
+	.dll_lock_diff2	= 0x1,
+	.invert_clkout2	= 0x0,
+};
+
+static const struct am33xx_emif_regs ddr3_regs = {
+	.emif_read_latency	= 0x100007,
+	.emif_tim1		= 0x0AAAD4DB,
+	.emif_tim2		= 0x266B7FDA,
+	.emif_tim3		= 0x501F867F,
+	.zq_config		= 0x50074BE4,
+	.sdram_config		= 0x61C05332,
+	.sdram_config2		= 0x0,
+	.sdram_ref_ctrl		= 0xC30,
+};
+
+static const struct am33xx_ddr_data ddr3_data_256mb = {
+	.rd_slave_ratio0	= 0x36,
+	.wr_dqs_slave_ratio0	= 0x38,
+	.fifo_we_slave_ratio0	= 0x99,
+	.wr_slave_ratio0	= 0x73,
+};
+
+static const struct am33xx_emif_regs ddr3_regs_256mb = {
+	.emif_read_latency	= 0x7,
+	.emif_tim1		= 0x0AAAD4DB,
+	.emif_tim2		= 0x26437FDA,
+	.emif_tim3		= 0x501F83FF,
+	.sdram_config		= 0x61C052B2,
+	.zq_config		= 0x50074BE4,
+	.sdram_ref_ctrl		= 0x00000C30,
+
+};
+
+extern char __dtb_am335x_baltos_minimal_start[];
+
+/**
+ * @brief The basic entry point for board initialization.
+ *
+ * This is called as part of machine init (after arch init).
+ * This is again called with stack in SRAM, so not too many
+ * constructs possible here.
+ *
+ * @return void
+ */
+static noinline int baltos_sram_init(void)
+{
+	uint32_t sdram_size;
+	void *fdt;
+
+	fdt = __dtb_am335x_baltos_minimal_start;
+
+	/* WDT1 is already running when the bootloader gets control
+	 * Disable it to avoid "random" resets
+	 */
+	__raw_writel(WDT_DISABLE_CODE1, AM33XX_WDT_REG(WSPR));
+	while (__raw_readl(AM33XX_WDT_REG(WWPS)) != 0x0);
+	__raw_writel(WDT_DISABLE_CODE2, AM33XX_WDT_REG(WSPR));
+	while (__raw_readl(AM33XX_WDT_REG(WWPS)) != 0x0);
+
+	/* Setup the PLLs and the clocks for the peripherals */
+	am33xx_pll_init(MPUPLL_M_500, DDRPLL_M_400);
+	am335x_sdram_init(0x18B, &ddr3_cmd_ctrl, &ddr3_regs, &ddr3_data);
+	sdram_size = get_ram_size((void *)0x80000000, (1024 << 20));
+	if (sdram_size == SZ_256M)
+		am335x_sdram_init(0x18B, &ddr3_cmd_ctrl, &ddr3_regs_256mb,
+				&ddr3_data_256mb);
+
+	am33xx_uart_soft_reset((void *)AM33XX_UART0_BASE);
+	am33xx_enable_uart0_pin_mux();
+	omap_uart_lowlevel_init((void *)AM33XX_UART0_BASE);
+	putc_ll('>');
+
+	am335x_barebox_entry(fdt);
+}
+
+ENTRY_FUNCTION(start_am33xx_baltos_sram, bootinfo, r1, r2)
+{
+	am33xx_save_bootinfo((void *)bootinfo);
+
+	/*
+	 * Setup C environment, the board init code uses global variables.
+	 * Stackpointer has already been initialized by the ROM code.
+	 */
+	relocate_to_current_adr();
+	setup_c();
+
+	baltos_sram_init();
+}
+
+ENTRY_FUNCTION(start_am33xx_baltos_sdram, r0, r1, r2)
+{
+	void *fdt;
+
+	fdt = __dtb_am335x_baltos_minimal_start;
+
+	fdt -= get_runtime_offset();
+
+	am335x_barebox_entry(fdt);
+}