tegra: Move tegra2 files into tegra-common

This code is required for Tegra30 also, so we move it into a common
directory.

BUG=chromium-os:19004
TEST=build and boot on Seaboard

Change-Id: I9af13892861f54c0d7da6d4f9ee0715bc5ab6357
Reviewed-on: http://gerrit.chromium.org/gerrit/7124
Reviewed-by: Yen Lin <yelin@nvidia.com>
Reviewed-by: Tom Warren <twarren@nvidia.com>
Tested-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>

5 files changed, 1580 insertions, 0 deletions

diff --git a/arch/arm/cpu/armv7/tegra-common/Makefile b/arch/arm/cpu/armv7/tegra-common/Makefile
new file mode 100644
index 0000000000..5c39030485
--- /dev/null
+++ b/arch/arm/cpu/armv7/tegra-common/Makefile
@@ -0,0 +1,52 @@
+#
+# (C) Copyright 2000-2003
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that 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, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+CFLAGS_arch/arm/cpu/armv7/tegra-common/ap20.o += -march=armv4t
+CFLAGS_arch/arm/cpu/armv7/tegra-common/clock.o += -march=armv4t
+
+include $(TOPDIR)/config.mk
+
+LIB	= $(obj)libtegra-common.o
+
+SOBJS-y	:= lowlevel_init.o
+COBJS-y	:= ap20.o clock.o timer.o
+
+SOBJS	:= $(SOBJS-y)
+COBJS	:= $(COBJS-y)
+
+SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
+OBJS	:= $(addprefix $(obj),$(COBJS) $(SOBJS))
+
+all:	$(obj).depend $(LIB)
+
+$(LIB):	$(OBJS)
+	$(call cmd_link_o_target, $(OBJS))
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/arch/arm/cpu/armv7/tegra-common/ap20.c b/arch/arm/cpu/armv7/tegra-common/ap20.c
new file mode 100644
index 0000000000..7eae670522
--- /dev/null
+++ b/arch/arm/cpu/armv7/tegra-common/ap20.c
@@ -0,0 +1,392 @@
+/*
+* (C) Copyright 2010-2011
+* NVIDIA Corporation <www.nvidia.com>
+*
+* See file CREDITS for list of people who contributed to this
+* project.
+*
+* This program is free software; you can redistribute it and/or
+* modify it under the terms of the GNU General Public License as
+* published by the Free Software Foundation; either version 2 of
+* the License, or (at your option) any later version.
+*
+* This program is distributed in the hope that 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, write to the Free Software
+* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+* MA 02111-1307 USA
+*/
+
+#include <asm/io.h>
+#include <asm/arch/tegra.h>
+#include <asm/arch/bitfield.h>
+#include <asm/arch/clk_rst.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/pmc.h>
+#include <asm/arch/pinmux.h>
+#include <asm/arch/scu.h>
+#include <common.h>
+#include <asm/arch/warmboot.h>
+#include <asm/arch-tegra/ap20.h>
+#include "../../../../../board/nvidia/common/board.h"
+
+struct clk_pll_table {
+	u16		n;
+	u16		m;
+	u8		p;
+	u8		cpcon;
+};
+
+/* ~0=uninitialized/unknown, 0=false, 1=true */
+uint32_t is_tegra2_processor_reset = 0xffffffff;
+
+/*
+ * Timing tables for each SOC for all four oscillator options.
+ */
+static struct clk_pll_table tegra_pll_x_table[TEGRA_SOC_COUNT]
+						[CLOCK_OSC_FREQ_COUNT] = {
+	/* T20: 1 GHz */
+	{{ 1000, 13, 0, 12},	/* OSC 13M */
+	 { 625,  12, 0, 8},	/* OSC 19.2M */
+	 { 1000, 12, 0, 12},	/* OSC 12M */
+	 { 1000, 26, 0, 12},	/* OSC 26M */
+	},
+
+	/* T25: 1.2 GHz */
+	{{ 923, 10, 0, 12},
+	 { 750, 12, 0,  8},
+	 { 600,  6, 0, 12},
+	 { 600, 13, 0, 12},
+	},
+};
+
+int ap20_cpu_is_cortexa9(void)
+{
+	u32 id = readb(NV_PA_PG_UP_BASE + PG_UP_TAG_0);
+	return id == (PG_UP_TAG_0_PID_CPU & 0xff);
+}
+
+static int pllx_set_rate(struct clk_pll *pll , u32 divn, u32 divm, u32 divp,
+			 u32 cpcon)
+{
+	u32 reg;
+
+	/* Set BYPASS, m, n and p to PLLX_BASE */
+	reg = bf_pack(PLL_BYPASS, 1) | bf_pack(PLL_DIVM, divm);
+	reg |= bf_pack(PLL_DIVN, divn) | bf_pack(PLL_DIVP, divp);
+	writel(reg, &pll->pll_base);
+
+	/* Set cpcon to PLLX_MISC */
+	reg = bf_pack(PLL_CPCON, cpcon);
+	writel(reg, &pll->pll_misc);
+
+	/* Enable PLLX */
+	reg = readl(&pll->pll_base);
+	reg |= bf_pack(PLL_ENABLE, 1);
+
+	/* Disable BYPASS */
+	reg &= ~bf_mask(PLL_BYPASS);
+	writel(reg, &pll->pll_base);
+
+	return 0;
+}
+
+void ap20_init_pllx(int slow)
+{
+	struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
+	struct clk_pll *pll = &clkrst->crc_pll[CLOCK_ID_XCPU];
+	int chip_type;
+	enum clock_osc_freq osc;
+	struct clk_pll_table *sel;
+
+	/* get chip type. If unknown, assign to T20 */
+	chip_type = tegra_get_chip_type();
+	if (slow || chip_type == TEGRA_SOC_UNKNOWN)
+		chip_type = TEGRA_SOC_T20;
+
+	/* get osc freq */
+	osc = clock_get_osc_freq();
+
+	/* set pllx */
+	sel = &tegra_pll_x_table[chip_type][osc];
+	pllx_set_rate(pll, sel->n, sel->m, sel->p, sel->cpcon);
+}
+
+static void enable_cpu_clock(int enable)
+{
+	struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
+	u32 clk;
+
+	/*
+	 * NOTE:
+	 * Regardless of whether the request is to enable or disable the CPU
+	 * clock, every processor in the CPU complex except the master (CPU 0)
+	 * will have it's clock stopped because the AVP only talks to the
+	 * master. The AVP does not know (nor does it need to know) that there
+	 * are multiple processors in the CPU complex.
+	 */
+
+	if (enable) {
+		/*
+		 * Initialize PLLX to a safe speed, as we are running at
+		 * a lower voltage for now until we get i2c up in board_init().
+		 */
+		ap20_init_pllx(1);
+
+		/* Wait until all clocks are stable */
+		udelay(PLL_STABILIZATION_DELAY);
+
+		writel(CCLK_BURST_POLICY, &clkrst->crc_cclk_brst_pol);
+		writel(SUPER_CCLK_DIVIDER, &clkrst->crc_super_cclk_div);
+	}
+
+	/*
+	 * Read the register containing the individual CPU clock enables and
+	 * always stop the clock to CPU 1.
+	 */
+	clk = readl(&clkrst->crc_clk_cpu_cmplx);
+	clk |= bf_pack(CPU1_CLK_STP, 1);
+
+	/* Stop/Unstop the CPU clock */
+	bf_update(CPU0_CLK_STP, clk, enable == 0);
+	writel(clk, &clkrst->crc_clk_cpu_cmplx);
+
+	clock_enable(PERIPH_ID_CPU);
+}
+
+static int is_cpu_powered(void)
+{
+	struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
+
+	return (readl(&pmc->pmc_pwrgate_status) & CPU_PWRED) ? 1 : 0;
+}
+
+static void remove_cpu_io_clamps(void)
+{
+	struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
+	u32 reg;
+
+	/* Remove the clamps on the CPU I/O signals */
+	reg = readl(&pmc->pmc_remove_clamping);
+	reg |= CPU_CLMP;
+	writel(reg, &pmc->pmc_remove_clamping);
+
+	/* Give I/O signals time to stabilize */
+	udelay(IO_STABILIZATION_DELAY);
+}
+
+static void powerup_cpu(void)
+{
+	struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
+	u32 reg;
+	int timeout = IO_STABILIZATION_DELAY;
+
+	if (!is_cpu_powered()) {
+		/* Toggle the CPU power state (OFF -> ON) */
+		reg = readl(&pmc->pmc_pwrgate_toggle);
+		reg &= PARTID_CP;
+		reg |= START_CP;
+		writel(reg, &pmc->pmc_pwrgate_toggle);
+
+		/* Wait for the power to come up */
+		while (!is_cpu_powered()) {
+			if (timeout-- == 0)
+				printf("CPU failed to power up!\n");
+			else
+				udelay(10);
+		}
+
+		/*
+		 * Remove the I/O clamps from CPU power partition.
+		 * Recommended only on a Warm boot, if the CPU partition gets
+		 * power gated. Shouldn't cause any harm when called after a
+		 * cold boot according to HW, probably just redundant.
+		 */
+		remove_cpu_io_clamps();
+	}
+}
+
+static void enable_cpu_power_rail(void)
+{
+	struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
+	u32 reg;
+
+	reg = readl(&pmc->pmc_cntrl);
+	reg |= CPUPWRREQ_OE;
+	writel(reg, &pmc->pmc_cntrl);
+
+	/*
+	 * The TI PMU65861C needs a 3.75ms delay between enabling
+	 * the power rail and enabling the CPU clock.  This delay
+	 * between SM1EN and SM1 is for switching time + the ramp
+	 * up of the voltage to the CPU (VDD_CPU from PMU). We use 0xf00 as
+	 * is is ARM-friendly (can fit in a single ARMv4T mov immmediate
+	 * instruction).
+	 */
+	udelay(3840);
+}
+
+static void reset_A9_cpu(int reset)
+{
+	/*
+	* NOTE:  Regardless of whether the request is to hold the CPU in reset
+	*        or take it out of reset, every processor in the CPU complex
+	*        except the master (CPU 0) will be held in reset because the
+	*        AVP only talks to the master. The AVP does not know that there
+	*        are multiple processors in the CPU complex.
+	*/
+
+	/* Hold CPU 1 in reset, and CPU 0 if asked */
+	reset_cmplx_set_enable(1, crc_rst_cpu | crc_rst_de | crc_rst_debug, 1);
+	reset_cmplx_set_enable(0, crc_rst_cpu | crc_rst_de | crc_rst_debug,
+			       reset);
+
+	/* Enable/Disable master CPU reset */
+	reset_set_enable(PERIPH_ID_CPU, reset);
+}
+
+static void clock_enable_coresight(int enable)
+{
+	u32 rst, src;
+
+	clock_set_enable(PERIPH_ID_CORESIGHT, enable);
+	reset_set_enable(PERIPH_ID_CORESIGHT, !enable);
+
+	if (enable) {
+		/*
+		 * Put CoreSight on PLLP_OUT0 (216 MHz) and divide it down by
+		 *  1.5, giving an effective frequency of 144MHz.
+		 * Set PLLP_OUT0 [bits31:30 = 00], and use a 7.1 divisor
+		 *  (bits 7:0), so 00000001b == 1.5 (n+1 + .5)
+		 */
+		src = CLK_DIVIDER(NVBL_PLLP_KHZ, 144000);
+		clock_ll_set_source_divisor(PERIPH_ID_CSI, 0, src);
+
+		/* Unlock the CPU CoreSight interfaces */
+		rst = 0xC5ACCE55;
+		writel(rst, CSITE_CPU_DBG0_LAR);
+		writel(rst, CSITE_CPU_DBG1_LAR);
+	}
+}
+
+void start_cpu(u32 reset_vector)
+{
+	/* Enable VDD_CPU */
+	enable_cpu_power_rail();
+
+	/* 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);
+}
+
+
+void halt_avp(void)
+{
+	for (;;) {
+		writel((HALT_COP_EVENT_JTAG | HALT_COP_EVENT_IRQ_1 \
+			| HALT_COP_EVENT_FIQ_1 | (FLOW_MODE_STOP<<29)),
+			FLOW_CTLR_HALT_COP_EVENTS);
+	}
+}
+
+void enable_scu(void)
+{
+	struct scu_ctlr *scu = (struct scu_ctlr *)NV_PA_ARM_PERIPHBASE;
+	u32 reg;
+
+	/* If SCU already setup/enabled, return */
+	if (readl(&scu->scu_ctrl) & SCU_CTRL_ENABLE)
+		return;
+
+	/* Invalidate all ways for all processors */
+	writel(0xFFFF, &scu->scu_inv_all);
+
+	/* Enable SCU - bit 0 */
+	reg = readl(&scu->scu_ctrl);
+	reg |= SCU_CTRL_ENABLE;
+	writel(reg, &scu->scu_ctrl);
+}
+
+void init_pmc_scratch(void)
+{
+	struct pmc_ctlr *const pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
+	int i;
+
+	/* SCRATCH0 is initialized by the boot ROM and shouldn't be cleared */
+	for (i = 0; i < 23; i++)
+		writel(0, &pmc->pmc_scratch1+i);
+
+	/* ODMDATA is for kernel use to determine RAM size, LP config, etc. */
+	writel(CONFIG_SYS_BOARD_ODMDATA, &pmc->pmc_scratch20);
+
+#ifdef CONFIG_TEGRA2_LP0
+	/* save Sdram params to PMC 2, 4, and 24 for WB0 */
+	warmboot_save_sdram_params();
+#endif
+}
+
+void tegra_start(void)
+{
+	struct pmux_tri_ctlr *pmt = (struct pmux_tri_ctlr *)NV_PA_APB_MISC_BASE;
+
+	/* If we are the AVP, start up the first Cortex-A9 */
+	if (!ap20_cpu_is_cortexa9()) {
+		extern void _start(void);
+
+		/* enable JTAG */
+		writel(0xC0, &pmt->pmt_cfg_ctl);
+
+		/*
+		* If we are ARM7 - give it a different stack. We are about to
+		* start up the A9 which will want to use this one.
+		*/
+		asm volatile("ldr	sp, =%c0\n"
+			: : "i"(AVP_EARLY_BOOT_STACK_LIMIT));
+
+		start_cpu((u32)_start);
+		halt_avp();
+		/* not reached */
+	}
+
+	/* Init PMC scratch memory */
+	init_pmc_scratch();
+
+	enable_scu();
+
+	/* enable SMP mode and FW for CPU0, by writing to Auxiliary Ctl reg */
+	asm volatile(
+		"mrc	p15, 0, r0, c1, c0, 1\n"
+		"orr	r0, r0, #0x41\n"
+		"mcr	p15, 0, r0, c1, c0, 1\n");
+
+	/* FIXME: should have ap20's L2 disabled too? */
+
+	/* Init is_tegra2_processor_reset */
+	is_tegra2_processor_reset = check_is_tegra2_processor_reset();
+}
+
diff --git a/arch/arm/cpu/armv7/tegra-common/clock.c b/arch/arm/cpu/armv7/tegra-common/clock.c
new file mode 100644
index 0000000000..fd5393086f
--- /dev/null
+++ b/arch/arm/cpu/armv7/tegra-common/clock.c
@@ -0,0 +1,955 @@
+/*
+ * Copyright (c) 2011 The Chromium OS Authors.
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/* Tegra2 Clock control functions */
+
+#include <asm/io.h>
+#include <asm/arch/bitfield.h>
+#include <asm/arch/clk_rst.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/timer.h>
+#include <asm/arch/tegra.h>
+#include <common.h>
+#include <div64.h>
+
+/*
+ * This is our record of the current clock rate of each clock. We don't
+ * fill all of these in since we are only really interested in clocks which
+ * we use as parents.
+ */
+static unsigned pll_rate[CLOCK_ID_COUNT];
+
+/*
+ * The oscillator frequency is fixed to one of four set values. Based on this
+ * the other clocks are set up appropriately.
+ */
+static unsigned osc_freq[CLOCK_OSC_FREQ_COUNT] = {
+	13000000,
+	19200000,
+	12000000,
+	26000000,
+};
+
+/*
+ * Clock types that we can use as a source. The Tegra2 has muxes for the
+ * peripheral clocks, and in most cases there are four options for the clock
+ * source. This gives us a clock 'type' and exploits what commonality exists
+ * in the device.
+ *
+ * Letters are obvious, except for T which means CLK_M, and S which means the
+ * clock derived from 32KHz. Beware that CLK_M (also called OSC in the
+ * datasheet) and PLL_M are different things. The former is the basic
+ * clock supplied to the SOC from an external oscillator. The latter is the
+ * memory clock PLL.
+ *
+ * See definitions in clock_id in the header file.
+ */
+enum clock_type_id {
+	CLOCK_TYPE_AXPT,	/* PLL_A, PLL_X, PLL_P, CLK_M */
+	CLOCK_TYPE_MCPA,	/* and so on */
+	CLOCK_TYPE_MCPT,
+	CLOCK_TYPE_PCM,
+	CLOCK_TYPE_PCMT,
+	CLOCK_TYPE_PCXTS,
+	CLOCK_TYPE_PDCT,
+
+	CLOCK_TYPE_COUNT,
+	CLOCK_TYPE_NONE = -1,	/* invalid clock type */
+};
+
+/* return 1 if a peripheral ID is in range */
+#define clock_type_id_isvalid(id) ((id) >= 0 && \
+		(id) < CLOCK_TYPE_COUNT)
+
+char pllp_valid = 1;	/* PLLP is set up correctly */
+
+enum {
+	CLOCK_MAX_MUX	= 4	/* number of source options for each clock */
+};
+
+/*
+ * Clock source mux for each clock type. This just converts our enum into
+ * a list of mux sources for use by the code. Note that CLOCK_TYPE_PCXTS
+ * is special as it has 5 sources. Since it also has a different number of
+ * bits in its register for the source, we just handle it with a special
+ * case in the code.
+ */
+#define CLK(x) CLOCK_ID_ ## x
+static enum clock_id clock_source[CLOCK_TYPE_COUNT] [CLOCK_MAX_MUX] = {
+	{ CLK(AUDIO),	CLK(XCPU),	CLK(PERIPH),	CLK(OSC)	},
+	{ CLK(MEMORY),	CLK(CGENERAL),	CLK(PERIPH),	CLK(AUDIO)	},
+	{ CLK(MEMORY),	CLK(CGENERAL),	CLK(PERIPH),	CLK(OSC)	},
+	{ CLK(PERIPH),	CLK(CGENERAL),	CLK(MEMORY),	CLK(NONE)	},
+	{ CLK(PERIPH),	CLK(CGENERAL),	CLK(MEMORY),	CLK(OSC)	},
+	{ CLK(PERIPH),	CLK(CGENERAL),	CLK(XCPU),	CLK(OSC)	},
+	{ CLK(PERIPH),	CLK(DISPLAY),	CLK(CGENERAL),	CLK(OSC)	},
+};
+
+/*
+ * Clock peripheral IDs which sadly don't match up with PERIPH_ID. This is
+ * not in the header file since it is for purely internal use - we want
+ * callers to use the PERIPH_ID for all access to peripheral clocks to avoid
+ * confusion bewteen PERIPH_ID_... and PERIPHC_...
+ *
+ * We don't call this CLOCK_PERIPH_ID or PERIPH_CLOCK_ID as it would just be
+ * confusing.
+ *
+ * Note to SOC vendors: perhaps define a unified numbering for peripherals and
+ * use it for reset, clock enable, clock source/divider and even pinmuxing
+ * if you can.
+ */
+enum periphc_internal_id {
+	/* 0x00 */
+	PERIPHC_I2S1,
+	PERIPHC_I2S2,
+	PERIPHC_SPDIF_OUT,
+	PERIPHC_SPDIF_IN,
+	PERIPHC_PWM,
+	PERIPHC_SPI1,
+	PERIPHC_SPI2,
+	PERIPHC_SPI3,
+
+	/* 0x08 */
+	PERIPHC_XIO,
+	PERIPHC_I2C1,
+	PERIPHC_DVC_I2C,
+	PERIPHC_TWC,
+	PERIPHC_0c,
+	PERIPHC_10,	/* PERIPHC_SPI1, what is this really? */
+	PERIPHC_DISP1,
+	PERIPHC_DISP2,
+
+	/* 0x10 */
+	PERIPHC_CVE,
+	PERIPHC_IDE0,
+	PERIPHC_VI,
+	PERIPHC_1c,
+	PERIPHC_SDMMC1,
+	PERIPHC_SDMMC2,
+	PERIPHC_G3D,
+	PERIPHC_G2D,
+
+	/* 0x18 */
+	PERIPHC_NDFLASH,
+	PERIPHC_SDMMC4,
+	PERIPHC_VFIR,
+	PERIPHC_EPP,
+	PERIPHC_MPE,
+	PERIPHC_MIPI,
+	PERIPHC_UART1,
+	PERIPHC_UART2,
+
+	/* 0x20 */
+	PERIPHC_HOST1X,
+	PERIPHC_21,
+	PERIPHC_TVO,
+	PERIPHC_HDMI,
+	PERIPHC_24,
+	PERIPHC_TVDAC,
+	PERIPHC_I2C2,
+	PERIPHC_EMC,
+
+	/* 0x28 */
+	PERIPHC_UART3,
+	PERIPHC_29,
+	PERIPHC_VI_SENSOR,
+	PERIPHC_2b,
+	PERIPHC_2c,
+	PERIPHC_SPI4,
+	PERIPHC_I2C3,
+	PERIPHC_SDMMC3,
+
+	/* 0x30 */
+	PERIPHC_UART4,
+	PERIPHC_UART5,
+	PERIPHC_VDE,
+	PERIPHC_OWR,
+	PERIPHC_NOR,
+	PERIPHC_CSITE,
+
+	PERIPHC_COUNT,
+
+	PERIPHC_NONE = -1,
+};
+
+/* return 1 if a periphc_internal_id is in range */
+#define periphc_internal_id_isvalid(id) ((id) >= 0 && \
+		(id) < PERIPHC_COUNT)
+
+/*
+ * Clock type for each peripheral clock source. We put the name in each
+ * record just so it is easy to match things up
+ */
+#define TYPE(name, type) type
+static enum clock_type_id clock_periph_type[PERIPHC_COUNT] = {
+	/* 0x00 */
+	TYPE(PERIPHC_I2S1,	CLOCK_TYPE_AXPT),
+	TYPE(PERIPHC_I2S2,	CLOCK_TYPE_AXPT),
+	TYPE(PERIPHC_SPDIF_OUT,	CLOCK_TYPE_AXPT),
+	TYPE(PERIPHC_SPDIF_IN,	CLOCK_TYPE_PCM),
+	TYPE(PERIPHC_PWM,	CLOCK_TYPE_PCXTS),
+	TYPE(PERIPHC_SPI1,	CLOCK_TYPE_PCMT),
+	TYPE(PERIPHC_SPI22,	CLOCK_TYPE_PCMT),
+	TYPE(PERIPHC_SPI3,	CLOCK_TYPE_PCMT),
+
+	/* 0x08 */
+	TYPE(PERIPHC_XIO,	CLOCK_TYPE_PCMT),
+	TYPE(PERIPHC_I2C1,	CLOCK_TYPE_PCMT),
+	TYPE(PERIPHC_DVC_I2C,	CLOCK_TYPE_PCMT),
+	TYPE(PERIPHC_TWC,	CLOCK_TYPE_PCMT),
+	TYPE(PERIPHC_NONE,	CLOCK_TYPE_NONE),
+	TYPE(PERIPHC_SPI1,	CLOCK_TYPE_PCMT),
+	TYPE(PERIPHC_DISP1,	CLOCK_TYPE_PDCT),
+	TYPE(PERIPHC_DISP2,	CLOCK_TYPE_PDCT),
+
+	/* 0x10 */
+	TYPE(PERIPHC_CVE,	CLOCK_TYPE_PDCT),
+	TYPE(PERIPHC_IDE0,	CLOCK_TYPE_PCMT),
+	TYPE(PERIPHC_VI,	CLOCK_TYPE_MCPA),
+	TYPE(PERIPHC_NONE,	CLOCK_TYPE_NONE),
+	TYPE(PERIPHC_SDMMC1,	CLOCK_TYPE_PCMT),
+	TYPE(PERIPHC_SDMMC2,	CLOCK_TYPE_PCMT),
+	TYPE(PERIPHC_G3D,	CLOCK_TYPE_MCPA),
+	TYPE(PERIPHC_G2D,	CLOCK_TYPE_MCPA),
+
+	/* 0x18 */
+	TYPE(PERIPHC_NDFLASH,	CLOCK_TYPE_PCMT),
+	TYPE(PERIPHC_SDMMC4,	CLOCK_TYPE_PCMT),
+	TYPE(PERIPHC_VFIR,	CLOCK_TYPE_PCMT),
+	TYPE(PERIPHC_EPP,	CLOCK_TYPE_MCPA),
+	TYPE(PERIPHC_MPE,	CLOCK_TYPE_MCPA),
+	TYPE(PERIPHC_MIPI,	CLOCK_TYPE_PCMT),
+	TYPE(PERIPHC_UART1,	CLOCK_TYPE_PCMT),
+	TYPE(PERIPHC_UART2,	CLOCK_TYPE_PCMT),
+
+	/* 0x20 */
+	TYPE(PERIPHC_HOST1X,	CLOCK_TYPE_MCPA),
+	TYPE(PERIPHC_NONE,	CLOCK_TYPE_NONE),
+	TYPE(PERIPHC_TVO,	CLOCK_TYPE_PDCT),
+	TYPE(PERIPHC_HDMI,	CLOCK_TYPE_PDCT),
+	TYPE(PERIPHC_NONE,	CLOCK_TYPE_NONE),
+	TYPE(PERIPHC_TVDAC,	CLOCK_TYPE_PDCT),
+	TYPE(PERIPHC_I2C2,	CLOCK_TYPE_PCMT),
+	TYPE(PERIPHC_EMC,	CLOCK_TYPE_MCPT),
+
+	/* 0x28 */
+	TYPE(PERIPHC_UART3,	CLOCK_TYPE_PCMT),
+	TYPE(PERIPHC_NONE,	CLOCK_TYPE_NONE),
+	TYPE(PERIPHC_VI,	CLOCK_TYPE_MCPA),
+	TYPE(PERIPHC_NONE,	CLOCK_TYPE_NONE),
+	TYPE(PERIPHC_NONE,	CLOCK_TYPE_NONE),
+	TYPE(PERIPHC_SPI4,	CLOCK_TYPE_PCMT),
+	TYPE(PERIPHC_I2C3,	CLOCK_TYPE_PCMT),
+	TYPE(PERIPHC_SDMMC3,	CLOCK_TYPE_PCMT),
+
+	/* 0x30 */
+	TYPE(PERIPHC_UART4,	CLOCK_TYPE_PCMT),
+	TYPE(PERIPHC_UART5,	CLOCK_TYPE_PCMT),
+	TYPE(PERIPHC_VDE,	CLOCK_TYPE_PCMT),
+	TYPE(PERIPHC_OWR,	CLOCK_TYPE_PCMT),
+	TYPE(PERIPHC_NOR,	CLOCK_TYPE_PCMT),
+	TYPE(PERIPHC_CSITE,	CLOCK_TYPE_PCMT),
+};
+
+/*
+ * This array translates a periph_id to a periphc_internal_id
+ *
+ * Not present/matched up:
+ *	uint vi_sensor;	 _VI_SENSOR_0,		0x1A8
+ * 	SPDIF - which is both 0x08 and 0x0c
+ *
+ */
+#define NONE(name) (-1)
+#define OFFSET(name, value) PERIPHC_ ## name
+static s8 periph_id_to_internal_id[PERIPH_ID_COUNT] = {
+	/* Low word: 31:0 */
+	NONE(CPU),
+	NONE(RESERVED1),
+	NONE(RESERVED2),
+	NONE(AC97),
+	NONE(RTC),
+	NONE(TMR),
+	PERIPHC_UART1,
+	PERIPHC_UART2,	/* and vfir 0x68 */
+
+	/* 0x08 */
+	NONE(GPIO),
+	PERIPHC_SDMMC2,
+	NONE(SPDIF),		/* 0x08 and 0x0c, unclear which to use */
+	PERIPHC_I2S1,
+	PERIPHC_I2C1,
+	PERIPHC_NDFLASH,
+	PERIPHC_SDMMC1,
+	PERIPHC_SDMMC4,
+
+	/* 0x10 */
+	PERIPHC_TWC,
+	PERIPHC_PWM,
+	PERIPHC_I2S2,
+	PERIPHC_EPP,
+	PERIPHC_VI,
+	PERIPHC_G2D,
+	NONE(USBD),
+	NONE(ISP),
+
+	/* 0x18 */
+	PERIPHC_G3D,
+	PERIPHC_IDE0,
+	PERIPHC_DISP2,
+	PERIPHC_DISP1,
+	PERIPHC_HOST1X,
+	NONE(VCP),
+	NONE(RESERVED30),
+	NONE(CACHE2),
+
+	/* Middle word: 63:32 */
+	NONE(MEM),
+	NONE(AHBDMA),
+	NONE(APBDMA),
+	NONE(RESERVED35),
+	NONE(KBC),
+	NONE(STAT_MON),
+	NONE(PMC),
+	NONE(FUSE),
+
+	/* 0x28 */
+	NONE(KFUSE),
+	NONE(SBC1),	/* SBC1, 0x34, is this SPI1? */
+	PERIPHC_NOR,
+	PERIPHC_SPI1,
+	PERIPHC_SPI2,
+	PERIPHC_XIO,
+	PERIPHC_SPI3,
+	PERIPHC_DVC_I2C,
+
+	/* 0x30 */
+	NONE(DSI),
+	PERIPHC_TVO,	/* also CVE 0x40 */
+	PERIPHC_MIPI,
+	PERIPHC_HDMI,
+	PERIPHC_CSITE,
+	PERIPHC_TVDAC,
+	PERIPHC_I2C2,
+	PERIPHC_UART3,
+
+	/* 0x38 */
+	NONE(RESERVED56),
+	PERIPHC_EMC,
+	NONE(USB2),
+	NONE(USB3),
+	PERIPHC_MPE,
+	PERIPHC_VDE,
+	NONE(BSEA),
+	NONE(BSEV),
+
+	/* Upper word 95:64 */
+	NONE(SPEEDO),
+	PERIPHC_UART4,
+	PERIPHC_UART5,
+	PERIPHC_I2C3,
+	PERIPHC_SPI4,
+	PERIPHC_SDMMC3,
+	NONE(PCIE),
+	PERIPHC_OWR,
+
+	/* 0x48 */
+	NONE(AFI),
+	NONE(CORESIGHT),
+	NONE(RESERVED74),
+	NONE(AVPUCQ),
+	NONE(RESERVED76),
+	NONE(RESERVED77),
+	NONE(RESERVED78),
+	NONE(RESERVED79),
+
+	/* 0x50 */
+	NONE(RESERVED80),
+	NONE(RESERVED81),
+	NONE(RESERVED82),
+	NONE(RESERVED83),
+	NONE(IRAMA),
+	NONE(IRAMB),
+	NONE(IRAMC),
+	NONE(IRAMD),
+
+	/* 0x58 */
+	NONE(CRAM2),
+};
+
+/*
+ * Get the oscillator frequency, from the corresponding hardware configuration
+ * field.
+ */
+enum clock_osc_freq clock_get_osc_freq(void)
+{
+	struct clk_rst_ctlr *clkrst =
+			(struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
+	u32 reg;
+
+	reg = readl(&clkrst->crc_osc_ctrl);
+	return bf_unpack(OSC_FREQ, reg);
+}
+
+/* Returns a pointer to the registers of the given pll */
+static struct clk_pll *get_pll(enum clock_id clkid)
+{
+	struct clk_rst_ctlr *clkrst =
+			(struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
+
+	assert(clock_id_isvalid(clkid));
+	return &clkrst->crc_pll[clkid];
+}
+
+unsigned long clock_start_pll(enum clock_id clkid, u32 divm, u32 divn,
+		u32 divp, u32 cpcon, u32 lfcon)
+{
+	struct clk_pll *pll = get_pll(clkid);
+	u32 data;
+
+	/*
+	 * We cheat by treating all PLL (except PLLU) in the same fashion.
+	 * This works only because:
+	 * - same fields are always mapped at same offsets, except DCCON
+	 * - DCCON is always 0, doesn't conflict
+	 * - M,N, P of PLLP values are ignored for PLLP
+	 */
+
+	data = bf_pack(PLL_CPCON, cpcon) |
+		bf_pack(PLL_LFCON, lfcon);
+	writel(data, &pll->pll_misc);
+
+	data = bf_pack(PLL_DIVM, divm) |
+		bf_pack(PLL_DIVN, divn) |
+		bf_pack(PLL_BYPASS, 0) |
+		bf_pack(PLL_ENABLE, 1);
+
+	if (clkid == CLOCK_ID_USB)
+		data |= bf_pack(PLL_VCO_FREQ, divp);
+	else
+		data |= bf_pack(PLL_DIVP, divp);
+	writel(data, &pll->pll_base);
+
+	/* calculate the stable time */
+	return timer_get_future_us(CLOCK_PLL_STABLE_DELAY_US);
+}
+
+/* return 1 if a peripheral ID is in range and valid */
+static int clock_periph_id_isvalid(enum periph_id id)
+{
+	if (id < PERIPH_ID_FIRST || id >= PERIPH_ID_COUNT)
+		printf("Peripheral id %d out of range\n", id);
+	else switch (id) {
+	case PERIPH_ID_RESERVED1:
+	case PERIPH_ID_RESERVED2:
+	case PERIPH_ID_RESERVED30:
+	case PERIPH_ID_RESERVED35:
+	case PERIPH_ID_RESERVED56:
+	case PERIPH_ID_RESERVED74:
+	case PERIPH_ID_RESERVED76:
+	case PERIPH_ID_RESERVED77:
+	case PERIPH_ID_RESERVED78:
+	case PERIPH_ID_RESERVED79:
+	case PERIPH_ID_RESERVED80:
+	case PERIPH_ID_RESERVED81:
+	case PERIPH_ID_RESERVED82:
+	case PERIPH_ID_RESERVED83:
+		printf("Peripheral id %d is reserved\n", id);
+		break;
+	default:
+		return 1;
+	}
+	return 0;
+}
+
+/* Returns a pointer to the clock source register for a peripheral */
+static u32 *get_periph_source_reg(enum periph_id periph_id)
+{
+	struct clk_rst_ctlr *clkrst =
+			(struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
+	enum periphc_internal_id internal_id;
+
+	assert(clock_periph_id_isvalid(periph_id));
+	internal_id = periph_id_to_internal_id[periph_id];
+	assert(internal_id != -1);
+	return &clkrst->crc_clk_src[internal_id];
+}
+
+void clock_ll_set_source_divisor(enum periph_id periph_id, int source,
+			      unsigned divisor)
+{
+	u32 *reg = get_periph_source_reg(periph_id);
+	u32 value;
+
+	value = readl(reg);
+	bf_update(OUT_CLK_SOURCE, value, source);
+	bf_update(OUT_CLK_DIVISOR, value, divisor);
+	writel(value, reg);
+}
+
+void clock_ll_set_source(enum periph_id periph_id, int source)
+{
+	u32 *reg = get_periph_source_reg(periph_id);
+
+	bf_writel(OUT_CLK_SOURCE, source, reg);
+}
+
+/**
+ * Given the parent's rate and the required rate for the children, this works
+ * out the peripheral clock divider to use, in 7.1 binary format.
+ *
+ * @param parent_rate	clock rate of parent clock in Hz
+ * @param rate		required clock rate for this clock
+ * @return divider which should be used
+ */
+static int clk_div7_1_get_divider(unsigned long parent_rate,
+				  unsigned long rate)
+{
+	u64 divider = parent_rate * 2;
+
+	divider += rate - 1;
+	do_div(divider, rate);
+
+	if ((s64)divider - 2 < 0)
+		return 0;
+
+	if ((s64)divider - 2 > 255)
+		return -1;
+
+	return divider - 2;
+}
+
+/**
+ * Given the parent's rate and the divider in 7.1 format, this works out the
+ * resulting peripheral clock rate.
+ *
+ * @param parent_rate	clock rate of parent clock in Hz
+ * @param divider which should be used in 7.1 format
+ * @return effective clock rate of peripheral
+ */
+static unsigned long get_rate_from_divider(unsigned long parent_rate,
+					   int divider)
+{
+	u64 rate;
+
+	rate = (u64)parent_rate * 2;
+	do_div (rate, divider + 2);
+	return rate;
+}
+
+unsigned long clock_get_periph_rate(enum periph_id periph_id,
+		enum clock_id parent)
+{
+	u32 *reg = get_periph_source_reg(periph_id);
+
+	return get_rate_from_divider(pll_rate[parent],
+				     bf_readl(OUT_CLK_DIVISOR, reg));
+}
+
+/**
+ * Find the best available 7.1 format divisor given a parent clock rate and
+ * required child clock rate. This function assumes that a second-stage
+ * divisor is available which can divide by powers of 2 from 1 to 256.
+ *
+ * @param parent_rate	clock rate of parent clock in Hz
+ * @param rate		required clock rate for this clock
+ * @param extra_div	value for the second-stage divisor (not set if this
+ *			function returns -1.
+ * @return divider which should be used, or -1 if nothing is valid
+ *
+ */
+static int find_best_divider(unsigned long parent_rate, unsigned long rate,
+		int *extra_div)
+{
+	int shift;
+	int best_divider = -1;
+	int best_error = rate;
+
+	/* try dividers from 1 to 256 and find closest match */
+	for (shift = 0; shift <= 8 && best_error > 0; shift++) {
+		unsigned divided_parent = parent_rate >> shift;
+		int divider = clk_div7_1_get_divider(divided_parent, rate);
+		unsigned effective_rate = get_rate_from_divider(divided_parent,
+						       divider);
+		int error = rate - effective_rate;
+
+		/* Given a valid divider, look for the lowest error */
+		if (divider != -1 && error < best_error) {
+			best_error = error;
+			*extra_div = 1 << shift;
+			best_divider = divider;
+		}
+	}
+
+	/* return what we found - *extra_div will already be set */
+	return best_divider;
+}
+
+/**
+ * Given a peripheral ID and the required source clock, this returns which
+ * value should be programmed into the source mux for that peripheral.
+ *
+ * There is special code here to handle the one source type with 5 sources.
+ *
+ * @param periph_id	peripheral to start
+ * @param source	PLL id of required parent clock
+ * @param mux_bits	Set to number of bits in mux register: 2 or 4
+ * @return mux value (0-4, or -1 if not found)
+ */
+static int get_periph_clock_source(enum periph_id periph_id,
+		enum clock_id parent, int *mux_bits)
+{
+	enum clock_type_id type;
+	enum periphc_internal_id internal_id;
+	int mux;
+
+	assert(clock_periph_id_isvalid(periph_id));
+
+	internal_id = periph_id_to_internal_id[periph_id];
+	assert(periphc_internal_id_isvalid(internal_id));
+
+	type = clock_periph_type[internal_id];
+	assert(clock_type_id_isvalid(type));
+
+	/* Special case here for the clock with a 4-bit source mux */
+	if (type == CLOCK_TYPE_PCXTS)
+		*mux_bits = 4;
+	else
+		*mux_bits = 2;
+
+	for (mux = 0; mux < CLOCK_MAX_MUX; mux++)
+		if (clock_source[type][mux] == parent)
+			return mux;
+
+	/*
+	 * Not found: it might be looking for the 'S' in CLOCK_TYPE_PCXTS
+	 * which is not in our table. If not, then they are asking for a
+	 * source which this peripheral can't access through its mux.
+	 */
+	assert(type == CLOCK_TYPE_PCXTS);
+	assert(parent == CLOCK_ID_SFROM32KHZ);
+	if (type == CLOCK_TYPE_PCXTS && parent == CLOCK_ID_SFROM32KHZ);
+		return 4;	/* mux value for this clock */
+
+	/* if we get here, either us or the caller has made a mistake */
+	printf("Caller requested bad clock: periph=%d, parent=%d\n", periph_id,
+		parent);
+	return -1;
+}
+
+/**
+ * Adjust peripheral PLL to use the given divider and source.
+ *
+ * @param periph_id	peripheral to adjust
+ * @param parent	Required parent clock (for source mux)
+ * @param divider	Required divider in 7.1 format
+ * @return 0 if ok, -1 on error (requesting a parent clock which is not valid
+ *		for this peripheral)
+ */
+static int adjust_periph_pll(enum periph_id periph_id,
+		enum clock_id parent, int divider)
+{
+	u32 *reg = get_periph_source_reg(periph_id);
+	int source, mux_bits;
+
+	bf_writel(OUT_CLK_DIVISOR, divider, reg);
+	udelay(1);
+
+	/* work out the source clock and set it */
+	source = get_periph_clock_source(periph_id, parent, &mux_bits);
+	if (source < 0)
+		return -1;
+	if (mux_bits == 4)
+		bf_writel(OUT_CLK_SOURCE4, source, reg);
+	else
+		bf_writel(OUT_CLK_SOURCE, source, reg);
+	udelay(2);
+	return 0;
+}
+
+unsigned clock_adjust_periph_pll_div(enum periph_id periph_id,
+		enum clock_id parent, unsigned rate, int *extra_div)
+{
+	unsigned effective_rate;
+	int divider;
+
+	if (extra_div)
+		divider = find_best_divider(pll_rate[parent], rate, extra_div);
+	else
+		divider = clk_div7_1_get_divider(pll_rate[parent], rate);
+	assert(divider >= 0);
+	if (adjust_periph_pll(periph_id, parent, divider))
+		return -1U;
+	debug("periph %d, rate=%d, reg=%p = %x\n", periph_id, rate,
+		get_periph_source_reg(periph_id),
+		readl(get_periph_source_reg(periph_id)));
+
+	/* Check what we ended up with. This shouldn't matter though */
+	effective_rate = clock_get_periph_rate(periph_id, parent);
+	if (extra_div)
+		effective_rate /= *extra_div;
+	if (rate != effective_rate)
+		debug("Requested clock rate %u not honored (got %u)\n",
+		       rate, effective_rate);
+	return effective_rate;
+}
+
+unsigned clock_start_periph_pll(enum periph_id periph_id,
+		enum clock_id parent, unsigned rate)
+{
+	unsigned effective_rate;
+
+	reset_set_enable(periph_id, 1);
+	clock_enable(periph_id);
+
+	effective_rate = clock_adjust_periph_pll_div(periph_id, parent, rate,
+						 NULL);
+
+	reset_set_enable(periph_id, 0);
+	return effective_rate;
+}
+
+void clock_set_enable(enum periph_id periph_id, int enable)
+{
+	struct clk_rst_ctlr *clkrst =
+			(struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
+	u32 *clk = &clkrst->crc_clk_out_enb[PERIPH_REG(periph_id)];
+	u32 reg;
+
+	/* Enable/disable the clock to this peripheral */
+	assert(clock_periph_id_isvalid(periph_id));
+	reg = readl(clk);
+	if (enable)
+		reg |= PERIPH_MASK(periph_id);
+	else
+		reg &= ~PERIPH_MASK(periph_id);
+	writel(reg, clk);
+}
+
+void clock_enable(enum periph_id clkid)
+{
+	clock_set_enable(clkid, 1);
+}
+
+void clock_disable(enum periph_id clkid)
+{
+	clock_set_enable(clkid, 0);
+}
+
+void reset_set_enable(enum periph_id periph_id, int enable)
+{
+	struct clk_rst_ctlr *clkrst =
+			(struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
+	u32 *reset = &clkrst->crc_rst_dev[PERIPH_REG(periph_id)];
+	u32 reg;
+
+	/* Enable/disable reset to the peripheral */
+	assert(clock_periph_id_isvalid(periph_id));
+	reg = readl(reset);
+	if (enable)
+		reg |= PERIPH_MASK(periph_id);
+	else
+		reg &= ~PERIPH_MASK(periph_id);
+	writel(reg, reset);
+}
+
+void reset_periph(enum periph_id periph_id, int us_delay)
+{
+	/* Put peripheral into reset */
+	reset_set_enable(periph_id, 1);
+	udelay(us_delay);
+
+	/* Remove reset */
+	reset_set_enable(periph_id, 0);
+
+	udelay(us_delay);
+}
+
+void reset_cmplx_set_enable(int cpu, int which, int reset)
+{
+	struct clk_rst_ctlr *clkrst =
+			(struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
+	u32 mask;
+
+	/* Form the mask, which depends on the cpu chosen. Tegra2 has 2 */
+	assert(cpu >= 0 && cpu < 2);
+	mask = which << cpu;
+
+	/* either enable or disable those reset for that CPU */
+	if (reset)
+		writel(mask, &clkrst->crc_cpu_cmplx_set);
+	else
+		writel(mask, &clkrst->crc_cpu_cmplx_clr);
+}
+
+unsigned clock_get_rate(enum clock_id clkid)
+{
+	struct clk_pll *pll;
+	u32 base;
+	u32 divm;
+	u64 parent_rate;
+	u64 rate;
+
+	parent_rate = osc_freq[clock_get_osc_freq()];
+	if (clkid == CLOCK_ID_OSC)
+		return parent_rate;
+
+	pll = get_pll(clkid);
+	base = readl(&pll->pll_base);
+	rate = parent_rate * bf_unpack(PLL_DIVN, base);
+	divm = bf_unpack(PLL_DIVM, base);
+	if (clkid == CLOCK_ID_USB)
+		divm <<= bf_unpack(PLLU_VCO_FREQ, base);
+	else
+		divm <<= bf_unpack(PLL_DIVP, base);
+	do_div(rate, divm);
+	return rate;
+}
+
+/**
+ * Set the output frequency you want for each PLL clock.
+ * PLL output frequencies are programmed by setting their N, M and P values.
+ * The governing equations are:
+ *     VCO = (Fi / m) * n, Fo = VCO / (2^p)
+ *     where Fo is the output frequency from the PLL.
+ * Example: Set the output frequency to 216Mhz(Fo) with 12Mhz OSC(Fi)
+ *     216Mhz = ((12Mhz / m) * n) / (2^p) so n=432,m=12,p=1
+ * Please see Tegra TRM section 5.3 to get the detail for PLL Programming
+ *
+ * @param n PLL feedback divider(DIVN)
+ * @param m PLL input divider(DIVN)
+ * @param p post divider(DIVP)
+ * @param cpcon base PLL charge pump(CPCON)
+ * @return 0 if ok, -1 on error (the requested PLL is incorrect and cannot
+ *		be overriden), 1 if PLL is already correct
+ */
+static int clock_set_rate(enum clock_id clkid, u32 n, u32 m, u32 p, u32 cpcon)
+{
+	u32 base_reg;
+	u32 misc_reg;
+	struct clk_pll *pll;
+
+	pll = get_pll(clkid);
+
+	base_reg = readl(&pll->pll_base);
+
+	/* Set BYPASS, m, n and p to PLL_BASE */
+	bf_update(PLL_DIVM, base_reg, m);
+	bf_update(PLL_DIVN, base_reg, n);
+	bf_update(PLL_DIVP, base_reg, p);
+	if (clkid == CLOCK_ID_PERIPH) {
+		/*
+		 * If the PLL is already set up, check that it is correct
+		 * and record this info for clock_verify() to check.
+		 */
+		if (base_reg & bf_mask(PLL_BASE_OVRRIDE)) {
+			base_reg |= bf_ones(PLL_ENABLE);
+			if (base_reg != readl(&pll->pll_base))
+				pllp_valid = 0;
+			return pllp_valid ? 1 : -1;
+		}
+		bf_update(PLL_BASE_OVRRIDE, base_reg, 1);
+	}
+
+	bf_update(PLL_BYPASS, base_reg, 1);
+	writel(base_reg, &pll->pll_base);
+
+	/* Set cpcon to PLL_MISC */
+	misc_reg = readl(&pll->pll_misc);
+	bf_update(PLL_CPCON, misc_reg, cpcon);
+	writel(misc_reg, &pll->pll_misc);
+
+	/* Enable PLL */
+	bf_update(PLL_ENABLE, base_reg, 1);
+	writel(base_reg, &pll->pll_base);
+
+	/* Disable BYPASS */
+	bf_update(PLL_BYPASS, base_reg, 0);
+	writel(base_reg, &pll->pll_base);
+
+	return 0;
+}
+
+int clock_verify(void)
+{
+	struct clk_pll *pll = get_pll(CLOCK_ID_PERIPH);
+	u32 reg = readl(&pll->pll_base);
+
+	if (!pllp_valid) {
+		printf("Warning: PLLP %x is not correct\n", reg);
+		return -1;
+	}
+	debug("PLLX %x is correct\n", reg);
+	return 0;
+}
+
+uint32_t check_is_tegra2_processor_reset(void)
+{
+	u32 base_reg;
+	struct clk_pll *pll;
+
+	pll = get_pll(CLOCK_ID_PERIPH);
+	base_reg = readl(&pll->pll_base);
+
+	return (base_reg & bf_mask(PLL_BASE_OVRRIDE)) ? 0 : 1;
+}
+
+void clock_early_init(void)
+{
+	/*
+	 * PLLP output frequency set to 216Mh
+	 * PLLC output frequency set to 600Mhz
+	 *
+	 * TODO: Can we calculate these values instead of hard-coding?
+	 */
+	switch (clock_get_osc_freq()) {
+	case CLOCK_OSC_FREQ_12_0: /* OSC is 12Mhz */
+		clock_set_rate(CLOCK_ID_PERIPH, 432, 12, 1, 8);
+		clock_set_rate(CLOCK_ID_CGENERAL, 600, 12, 0, 8);
+		break;
+
+	case CLOCK_OSC_FREQ_26_0: /* OSC is 26Mhz */
+		clock_set_rate(CLOCK_ID_PERIPH, 432, 26, 1, 8);
+		clock_set_rate(CLOCK_ID_CGENERAL, 600, 26, 0, 8);
+		break;
+
+	case CLOCK_OSC_FREQ_13_0:
+	case CLOCK_OSC_FREQ_19_2:
+	default:
+		/*
+		 * These are not supported. It is too early to print a
+		 * message and the UART likely won't work anyway due to the
+		 * oscillator being wrong.
+		 */
+		break;
+	}
+}
+
+void clock_init(void)
+{
+	pll_rate[CLOCK_ID_MEMORY] = clock_get_rate(CLOCK_ID_MEMORY);
+	pll_rate[CLOCK_ID_PERIPH] = clock_get_rate(CLOCK_ID_PERIPH);
+	pll_rate[CLOCK_ID_CGENERAL] = clock_get_rate(CLOCK_ID_CGENERAL);
+	pll_rate[CLOCK_ID_OSC] = clock_get_rate(CLOCK_ID_OSC);
+	pll_rate[CLOCK_ID_SFROM32KHZ] = 32768;
+	debug("Osc = %d\n", pll_rate[CLOCK_ID_OSC]);
+	debug("PLLM = %d\n", pll_rate[CLOCK_ID_MEMORY]);
+	debug("PLLP = %d\n", pll_rate[CLOCK_ID_PERIPH]);
+}
diff --git a/arch/arm/cpu/armv7/tegra-common/lowlevel_init.S b/arch/arm/cpu/armv7/tegra-common/lowlevel_init.S
new file mode 100644
index 0000000000..333f1b7c8e
--- /dev/null
+++ b/arch/arm/cpu/armv7/tegra-common/lowlevel_init.S
@@ -0,0 +1,46 @@
+/*
+ * SoC-specific setup info
+ *
+ * (C) Copyright 2010,2011
+ * NVIDIA Corporation <www.nvidia.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <config.h>
+#include <version.h>
+
+	.align	5
+.global reset_cpu
+reset_cpu:
+	ldr	r1, rstctl			@ get addr for global reset
+						@ reg
+	ldr	r3, [r1]
+	orr	r3, r3, #0x10
+	str	r3, [r1]			@ force reset
+	mov	r0, r0
+_loop_forever:
+	b	_loop_forever
+rstctl:
+	.word	PRM_RSTCTRL
+
+.globl lowlevel_init
+lowlevel_init:
+	@ Nothing to do here on Tegra2
+	mov	pc, lr				@ back to arch calling code
diff --git a/arch/arm/cpu/armv7/tegra-common/timer.c b/arch/arm/cpu/armv7/tegra-common/timer.c
new file mode 100644
index 0000000000..552c9adcbb
--- /dev/null
+++ b/arch/arm/cpu/armv7/tegra-common/timer.c
@@ -0,0 +1,135 @@
+/*
+ * (C) Copyright 2010,2011
+ * NVIDIA Corporation <www.nvidia.com>
+ *
+ * (C) Copyright 2008
+ * Texas Instruments
+ *
+ * Richard Woodruff <r-woodruff2@ti.com>
+ * Syed Moahmmed Khasim <khasim@ti.com>
+ *
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ * Alex Zuepke <azu@sysgo.de>
+ *
+ * (C) Copyright 2002
+ * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/tegra.h>
+#include <asm/arch/timer.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* counter runs at 1MHz */
+#define TIMER_CLK	1000000
+#define TIMER_LOAD_VAL	0xffffffff
+
+/* timer without interrupts */
+void reset_timer(void)
+{
+	reset_timer_masked();
+}
+
+ulong get_timer(ulong base)
+{
+	return get_timer_masked() - base;
+}
+
+void set_timer(ulong t)
+{
+	gd->tbl = t;
+}
+
+/* delay x useconds */
+void __udelay(unsigned long usec)
+{
+	long tmo = usec * (TIMER_CLK / 1000) / 1000;
+	unsigned long now, last = timer_get_us();
+
+	while (tmo > 0) {
+		now = timer_get_us();
+		if (last > now) /* count up timer overflow */
+			tmo -= TIMER_LOAD_VAL - last + now;
+		else
+			tmo -= now - last;
+		last = now;
+	}
+}
+
+void reset_timer_masked(void)
+{
+	/* reset time, capture current incrementer value time */
+	gd->lastinc = timer_get_us() / (TIMER_CLK/CONFIG_SYS_HZ);
+	gd->tbl = 0;		/* start "advancing" time stamp from 0 */
+}
+
+ulong get_timer_masked(void)
+{
+	ulong now;
+
+	/* current tick value */
+	now = timer_get_us() / (TIMER_CLK / CONFIG_SYS_HZ);
+
+	if (now >= gd->lastinc)	/* normal mode (non roll) */
+		/* move stamp forward with absolute diff ticks */
+		gd->tbl += (now - gd->lastinc);
+	else	/* we have rollover of incrementer */
+		gd->tbl += ((TIMER_LOAD_VAL / (TIMER_CLK / CONFIG_SYS_HZ))
+				- gd->lastinc) + now;
+	gd->lastinc = now;
+	return gd->tbl;
+}
+
+/*
+ * This function is derived from PowerPC code (read timebase as long long).
+ * On ARM it just returns the timer value.
+ */
+unsigned long long get_ticks(void)
+{
+	return get_timer(0);
+}
+
+/*
+ * This function is derived from PowerPC code (timebase clock frequency).
+ * On ARM it returns the number of timer ticks per second.
+ */
+ulong get_tbclk(void)
+{
+	return CONFIG_SYS_HZ;
+}
+
+
+unsigned long timer_get_us(void)
+{
+	struct timerus *timer_base = (struct timerus *)NV_PA_TMRUS_BASE;
+
+	return readl(&timer_base->cntr_1us);
+}
+
+unsigned long timer_get_future_us(u32 delay)
+{
+	return timer_get_us() + delay;
+}
+