Initial import of qemu-2.4.1HEADmaster

2 files changed, 184 insertions, 0 deletions

diff --git a/roms/u-boot/arch/arm/cpu/arm720t/tegra30/Makefile b/roms/u-boot/arch/arm/cpu/arm720t/tegra30/Makefile
new file mode 100644
index 00000000..6ff4c552
--- /dev/null
+++ b/roms/u-boot/arch/arm/cpu/arm720t/tegra30/Makefile
@@ -0,0 +1,20 @@
+#
+# Copyright (c) 2010-2012, NVIDIA CORPORATION.  All rights reserved.
+#
+# (C) Copyright 2000-2008
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms and conditions of the GNU General Public License,
+# version 2, as published by the Free Software Foundation.
+#
+# This program is distributed in the hope it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+# more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+obj-y	+= cpu.o
diff --git a/roms/u-boot/arch/arm/cpu/arm720t/tegra30/cpu.c b/roms/u-boot/arch/arm/cpu/arm720t/tegra30/cpu.c
new file mode 100644
index 00000000..a8064838
--- /dev/null
+++ b/roms/u-boot/arch/arm/cpu/arm720t/tegra30/cpu.c
@@ -0,0 +1,164 @@
+/*
+ * Copyright (c) 2010-2014, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/flow.h>
+#include <asm/arch/tegra.h>
+#include <asm/arch-tegra/clk_rst.h>
+#include <asm/arch-tegra/pmc.h>
+#include <asm/arch-tegra/tegra_i2c.h>
+#include "../tegra-common/cpu.h"
+
+/* Tegra30-specific CPU init code */
+void tegra_i2c_ll_write_addr(uint addr, uint config)
+{
+	struct i2c_ctlr *reg = (struct i2c_ctlr *)TEGRA_DVC_BASE;
+
+	writel(addr, &reg->cmd_addr0);
+	writel(config, &reg->cnfg);
+}
+
+void tegra_i2c_ll_write_data(uint data, uint config)
+{
+	struct i2c_ctlr *reg = (struct i2c_ctlr *)TEGRA_DVC_BASE;
+
+	writel(data, &reg->cmd_data1);
+	writel(config, &reg->cnfg);
+}
+
+#define TPS65911_I2C_ADDR		0x5A
+#define TPS65911_VDDCTRL_OP_REG		0x28
+#define TPS65911_VDDCTRL_SR_REG		0x27
+#define TPS65911_VDDCTRL_OP_DATA	(0x2300 | TPS65911_VDDCTRL_OP_REG)
+#define TPS65911_VDDCTRL_SR_DATA	(0x0100 | TPS65911_VDDCTRL_SR_REG)
+#define I2C_SEND_2_BYTES		0x0A02
+
+static void enable_cpu_power_rail(void)
+{
+	struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
+	u32 reg;
+
+	debug("enable_cpu_power_rail entry\n");
+	reg = readl(&pmc->pmc_cntrl);
+	reg |= CPUPWRREQ_OE;
+	writel(reg, &pmc->pmc_cntrl);
+
+	/*
+	 * Bring up CPU VDD via the TPS65911x PMIC on the DVC I2C bus.
+	 * First set VDD to 1.4V, then enable the VDD regulator.
+	 */
+	tegra_i2c_ll_write_addr(TPS65911_I2C_ADDR, 2);
+	tegra_i2c_ll_write_data(TPS65911_VDDCTRL_OP_DATA, I2C_SEND_2_BYTES);
+	udelay(1000);
+	tegra_i2c_ll_write_data(TPS65911_VDDCTRL_SR_DATA, I2C_SEND_2_BYTES);
+	udelay(10 * 1000);
+}
+
+/**
+ * The T30 requires some special clock initialization, including setting up
+ * the dvc i2c, turning on mselect and selecting the G CPU cluster
+ */
+void t30_init_clocks(void)
+{
+	struct clk_rst_ctlr *clkrst =
+			(struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
+	struct flow_ctlr *flow = (struct flow_ctlr *)NV_PA_FLOW_BASE;
+	u32 val;
+
+	debug("t30_init_clocks entry\n");
+	/* Set active CPU cluster to G */
+	clrbits_le32(flow->cluster_control, 1 << 0);
+
+	writel(SUPER_SCLK_ENB_MASK, &clkrst->crc_super_sclk_div);
+
+	val = (0 << CLK_SYS_RATE_HCLK_DISABLE_SHIFT) |
+		(1 << CLK_SYS_RATE_AHB_RATE_SHIFT) |
+		(0 << CLK_SYS_RATE_PCLK_DISABLE_SHIFT) |
+		(0 << CLK_SYS_RATE_APB_RATE_SHIFT);
+	writel(val, &clkrst->crc_clk_sys_rate);
+
+	/* Put i2c, mselect in reset and enable clocks */
+	reset_set_enable(PERIPH_ID_DVC_I2C, 1);
+	clock_set_enable(PERIPH_ID_DVC_I2C, 1);
+	reset_set_enable(PERIPH_ID_MSELECT, 1);
+	clock_set_enable(PERIPH_ID_MSELECT, 1);
+
+	/* Switch MSELECT clock to PLLP (00) and use a divisor of 2 */
+	clock_ll_set_source_divisor(PERIPH_ID_MSELECT, 0, 2);
+
+	/*
+	 * Our high-level clock routines are not available prior to
+	 * relocation. We use the low-level functions which require a
+	 * hard-coded divisor. Use CLK_M with divide by (n + 1 = 17)
+	 */
+	clock_ll_set_source_divisor(PERIPH_ID_DVC_I2C, 3, 16);
+
+	/*
+	 * Give clocks time to stabilize, then take i2c and mselect out of
+	 * reset
+	 */
+	udelay(1000);
+	reset_set_enable(PERIPH_ID_DVC_I2C, 0);
+	reset_set_enable(PERIPH_ID_MSELECT, 0);
+}
+
+static void set_cpu_running(int run)
+{
+	struct flow_ctlr *flow = (struct flow_ctlr *)NV_PA_FLOW_BASE;
+
+	debug("set_cpu_running entry, run = %d\n", run);
+	writel(run ? FLOW_MODE_NONE : FLOW_MODE_STOP, &flow->halt_cpu_events);
+}
+
+void start_cpu(u32 reset_vector)
+{
+	debug("start_cpu entry, reset_vector = %x\n", reset_vector);
+	t30_init_clocks();
+
+	/* Enable VDD_CPU */
+	enable_cpu_power_rail();
+
+	set_cpu_running(0);
+
+	/* Hold the CPUs in reset */
+	reset_A9_cpu(1);
+
+	/* Disable the CPU clock */
+	enable_cpu_clock(0);
+
+	/* Enable CoreSight */
+	clock_enable_coresight(1);
+
+	/*
+	 * Set the entry point for CPU execution from reset,
+	 *  if it's a non-zero value.
+	 */
+	if (reset_vector)
+		writel(reset_vector, EXCEP_VECTOR_CPU_RESET_VECTOR);
+
+	/* Enable the CPU clock */
+	enable_cpu_clock(1);
+
+	/* If the CPU doesn't already have power, power it up */
+	powerup_cpu();
+
+	/* Take the CPU out of reset */
+	reset_A9_cpu(0);
+
+	set_cpu_running(1);
+}