[U-Boot] [PATCH v2 2/7] Tegra30: Add AVP (arm720t) files

Tom Warren
2012-12-03T23:45:17Z

This provides SPL support for T30 boards - AVP early init, plus
CPU (A9) init/jump to main U-Boot.

Some changes were made to Tegra20 cpu.c to move common routines
into tegra-common/cpu.c and reduce code duplication.

Signed-off-by: Tom Warren <twarren@nvidia.com>
---
V2: Move common CPU init code to tegra-common/cpu.c

arch/arm/cpu/arm720t/tegra-common/Makefile | 1 +
arch/arm/cpu/arm720t/tegra-common/cpu.c | 342 ++++++++++++++++++++++++++++
arch/arm/cpu/arm720t/tegra-common/cpu.h | 64 ++----
arch/arm/cpu/arm720t/tegra-common/spl.c | 3 +-
arch/arm/cpu/arm720t/tegra20/cpu.c | 216 ++----------------
arch/arm/cpu/arm720t/tegra30/Makefile | 41 ++++
arch/arm/cpu/arm720t/tegra30/config.mk | 19 ++
arch/arm/cpu/arm720t/tegra30/cpu.c | 176 ++++++++++++++
8 files changed, 615 insertions(+), 247 deletions(-)
create mode 100644 arch/arm/cpu/arm720t/tegra-common/cpu.c
create mode 100644 arch/arm/cpu/arm720t/tegra30/Makefile
create mode 100644 arch/arm/cpu/arm720t/tegra30/config.mk
create mode 100644 arch/arm/cpu/arm720t/tegra30/cpu.c

diff --git a/arch/arm/cpu/arm720t/tegra-common/Makefile b/arch/arm/cpu/arm720t/tegra-common/Makefile
index febd2e3..6cbc6ad 100644
--- a/arch/arm/cpu/arm720t/tegra-common/Makefile
+++ b/arch/arm/cpu/arm720t/tegra-common/Makefile
@@ -28,6 +28,7 @@ include $(TOPDIR)/config.mk
LIB = $(obj)libtegra-common.o

COBJS-$(CONFIG_SPL_BUILD) += spl.o
+COBJS-y += cpu.o

SRCS := $(COBJS-y:.o=.c)
OBJS := $(addprefix $(obj),$(COBJS-y))
diff --git a/arch/arm/cpu/arm720t/tegra-common/cpu.c b/arch/arm/cpu/arm720t/tegra-common/cpu.c
new file mode 100644
index 0000000..2fbe02b
--- /dev/null
+++ b/arch/arm/cpu/arm720t/tegra-common/cpu.c
@@ -0,0 +1,342 @@
+/*
+ * Copyright (c) 2010-2012, 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/gp_padctrl.h>
+#include <asm/arch/pinmux.h>
+#include <asm/arch/tegra.h>
+#include <asm/arch-tegra/clk_rst.h>
+#include <asm/arch-tegra/pmc.h>
+#include <asm/arch-tegra/scu.h>
+#include "cpu.h"
+
+enum tegra_family_t {
+ TEGRA_FAMILY_T2x,
+ TEGRA_FAMILY_T3x,
+};
+
+
+enum tegra_family_t get_family(void)
+{
+ u32 reg, chip_id;
+
+ reg = readl(NV_PA_APB_MISC_BASE + GP_HIDREV);
+
+ chip_id = reg >> 8;
+ chip_id &= 0xff;
+ debug(" tegra_get_family: chip_id = %x\n", chip_id);
+ if (chip_id == 0x30)
+ return TEGRA_FAMILY_T3x;
+ else
+ return TEGRA_FAMILY_T2x;
+}
+
+int get_num_cpus(void)
+{
+ return get_family() == TEGRA_FAMILY_T3x ? 4 : 2;
+}
+
+/*
+ * Timing tables for each SOC for all four oscillator options.
+ */
+struct clk_pll_table tegra_pll_x_table[TEGRA_SOC_CNT][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},
+ },
+
+ /* T30(slow): 1.0 GHz */
+ {{ 1000, 13, 0, 8},
+ { 625, 12, 0, 4},
+ { 1000, 12, 0, 8},
+ { 1000, 26, 0, 8},
+ },
+
+ /* T30(high): 1.4 GHz */
+ {{ 862, 8, 0, 8},
+ { 583, 8, 0, 4},
+ { 700, 6, 0, 8},
+ { 700, 13, 0, 8},
+ },
+
+ /* TEGRA_SOC2_SLOW: 312 MHz */
+ {{ 312, 13, 0, 12}, /* OSC 13M */
+ { 260, 16, 0, 8}, /* OSC 19.2M */
+ { 312, 12, 0, 12}, /* OSC 12M */
+ { 312, 26, 0, 12}, /* OSC 26M */
+ },
+};
+
+void adjust_pllp_out_freqs(void)
+{
+ struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
+ struct clk_pll *pll = &clkrst->crc_pll[CLOCK_ID_PERIPH];
+ u32 reg;
+
+ /* Set T30 PLLP_OUT1, 2, 3 & 4 freqs to 9.6, 48, 102 & 204MHz */
+ reg = readl(&pll->pll_out[0]); /* OUTA, contains OUT2 / OUT1 */
+ reg |= (IN_408_OUT_48_DIVISOR << PLLP_OUT2_RATIO) | PLLP_OUT2_OVR
+ | (IN_408_OUT_9_6_DIVISOR << PLLP_OUT1_RATIO) | PLLP_OUT1_OVR;
+ writel(reg, &pll->pll_out[0]);
+
+ reg = readl(&pll->pll_out[1]); /* OUTB, contains OUT4 / OUT3 */
+ reg |= (IN_408_OUT_204_DIVISOR << PLLP_OUT4_RATIO) | PLLP_OUT4_OVR
+ | (IN_408_OUT_102_DIVISOR << PLLP_OUT3_RATIO) | PLLP_OUT3_OVR;
+ writel(reg, &pll->pll_out[1]);
+}
+
+int pllx_set_rate(struct clk_pll_simple *pll , u32 divn, u32 divm,
+ u32 divp, u32 cpcon)
+{
+ u32 reg;
+
+ /* If PLLX is already enabled, just return */
+ if (readl(&pll->pll_base) & PLL_ENABLE_MASK) {
+ debug("pllx_set_rate: PLLX already enabled, returning\n");
+ return 0;
+ }
+
+ debug(" pllx_set_rate entry\n");
+
+ /* Set BYPASS, m, n and p to PLLX_BASE */
+ reg = PLL_BYPASS_MASK | (divm << PLL_DIVM_SHIFT);
+ reg |= ((divn << PLL_DIVN_SHIFT) | (divp << PLL_DIVP_SHIFT));
+ writel(reg, &pll->pll_base);
+
+ /* Set cpcon to PLLX_MISC */
+ reg = (cpcon << PLL_CPCON_SHIFT);
+
+ /* Set dccon to PLLX_MISC if freq > 600MHz */
+ if (divn > 600)
+ reg |= (1 << PLL_DCCON_SHIFT);
+ writel(reg, &pll->pll_misc);
+
+ /* Enable PLLX */
+ reg = readl(&pll->pll_base);
+ reg |= PLL_ENABLE_MASK;
+
+ /* Disable BYPASS */
+ reg &= ~PLL_BYPASS_MASK;
+ writel(reg, &pll->pll_base);
+
+ /* Set lock_enable to PLLX_MISC */
+ reg = readl(&pll->pll_misc);
+ reg |= PLL_LOCK_ENABLE_MASK;
+ writel(reg, &pll->pll_misc);
+
+ return 0;
+}
+
+void init_pllx(int slow)
+{
+ struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
+ struct clk_pll_simple *pll = &clkrst->crc_pll_simple[SIMPLE_PLLX];
+ int chip_type;
+ enum clock_osc_freq osc;
+ struct clk_pll_table *sel;
+
+ debug("init_pllx entry\n");
+
+ /* get chip type */
+ chip_type = tegra_get_chip_type();
+ debug(" init_pllx: chip_type = %d\n", chip_type);
+
+ /* get osc freq */
+ osc = clock_get_osc_freq();
+ debug(" init_pllx: osc = %d\n", osc);
+
+ /* set pllx */
+ sel = &tegra_pll_x_table[chip_type][osc];
+ pllx_set_rate(pll, sel->n, sel->m, sel->p, sel->cpcon);
+
+ /* once we are out of slow mode, set up the T30 PLLs also */
+ if (!slow && chip_type == TEGRA_SOC_T30_408MHZ) {
+ debug(" init_pllx: adjusting PLLP out freqs\n");
+ adjust_pllp_out_freqs();
+ }
+}
+
+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.
+ */
+
+ if (enable) {
+ /* Initialize PLLX */
+ 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 clocks to CPUs > 0.
+ */
+ clk = readl(&clkrst->crc_clk_cpu_cmplx);
+ clk |= 1 << CPU1_CLK_STP_SHIFT;
+#if defined(CONFIG_TEGRA30)
+ clk |= 1 << CPU2_CLK_STP_SHIFT;
+ clk |= 1 << CPU3_CLK_STP_SHIFT;
+#endif
+ /* Stop/Unstop the CPU clock */
+ clk &= ~CPU0_CLK_STP_MASK;
+ clk |= !enable << CPU0_CLK_STP_SHIFT;
+ 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);
+}
+
+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();
+ }
+}
+
+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.
+ */
+ int mask = crc_rst_cpu | crc_rst_de | crc_rst_debug;
+ int num_cpus = get_num_cpus();
+ int cpu;
+
+ debug("reset_a9_cpu entry\n");
+ /* Hold CPUs 1 onwards in reset, and CPU 0 if asked */
+ for (cpu = 1; cpu < num_cpus; cpu++)
+ reset_cmplx_set_enable(cpu, mask, 1);
+ reset_cmplx_set_enable(0, mask, reset);
+
+ /* Enable/Disable master CPU reset */
+ reset_set_enable(PERIPH_ID_CPU, reset);
+}
+
+void clock_enable_coresight(int enable)
+{
+ u32 rst, src;
+
+ debug("clock_enable_coresight entry\n");
+ 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)
+ *
+ * Clock divider request for 204MHz would setup CSITE clock as
+ * 144MHz for PLLP base 216MHz and 204MHz for PLLP base 408MHz
+ */
+ if (tegra_get_chip_type() == TEGRA_SOC_T30_408MHZ)
+ src = CLK_DIVIDER(NVBL_PLLP_KHZ, 204000);
+ else
+ src = CLK_DIVIDER(NVBL_PLLP_KHZ, 144000);
+ clock_ll_set_source_divisor(PERIPH_ID_CSI, 0, src);
+
+ /* Unlock the CPU CoreSight interfaces */
+ rst = CORESIGHT_UNLOCK;
+ writel(rst, CSITE_CPU_DBG0_LAR);
+ writel(rst, CSITE_CPU_DBG1_LAR);
+#if defined(CONFIG_TEGRA30)
+ writel(rst, CSITE_CPU_DBG2_LAR);
+ writel(rst, CSITE_CPU_DBG3_LAR);
+#endif
+ }
+}
+
+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);
+ }
+}
diff --git a/arch/arm/cpu/arm720t/tegra-common/cpu.h b/arch/arm/cpu/arm720t/tegra-common/cpu.h
index 6804cd7..3e6bfcc 100644
--- a/arch/arm/cpu/arm720t/tegra-common/cpu.h
+++ b/arch/arm/cpu/arm720t/tegra-common/cpu.h
@@ -44,50 +44,11 @@

#define CORESIGHT_UNLOCK 0xC5ACCE55;

-/* AP20-Specific Base Addresses */
-
-/* AP20 Base physical address of SDRAM. */
-#define AP20_BASE_PA_SDRAM 0x00000000
-/* AP20 Base physical address of internal SRAM. */
-#define AP20_BASE_PA_SRAM 0x40000000
-/* AP20 Size of internal SRAM (256KB). */
-#define AP20_BASE_PA_SRAM_SIZE 0x00040000
-/* AP20 Base physical address of flash. */
-#define AP20_BASE_PA_NOR_FLASH 0xD0000000
-/* AP20 Base physical address of boot information table. */
-#define AP20_BASE_PA_BOOT_INFO AP20_BASE_PA_SRAM
-
-/*
- * Super-temporary stacks for EXTREMELY early startup. The values chosen for
- * these addresses must be valid on ALL SOCs because this value is used before
- * we are able to differentiate between the SOC types.
- *
- * NOTE: The since CPU's stack will eventually be moved from IRAM to SDRAM, its
- * stack is placed below the AVP stack. Once the CPU stack has been moved,
- * the AVP is free to use the IRAM the CPU stack previously occupied if
- * it should need to do so.
- *
- * NOTE: In multi-processor CPU complex configurations, each processor will have
- * its own stack of size CPU_EARLY_BOOT_STACK_SIZE. CPU 0 will have a
- * limit of CPU_EARLY_BOOT_STACK_LIMIT. Each successive CPU will have a
- * stack limit that is CPU_EARLY_BOOT_STACK_SIZE less then the previous
- * CPU.
- */
-
-/* Common AVP early boot stack limit */
-#define AVP_EARLY_BOOT_STACK_LIMIT \
- (AP20_BASE_PA_SRAM + (AP20_BASE_PA_SRAM_SIZE/2))
-/* Common AVP early boot stack size */
-#define AVP_EARLY_BOOT_STACK_SIZE 0x1000
-/* Common CPU early boot stack limit */
-#define CPU_EARLY_BOOT_STACK_LIMIT \
- (AVP_EARLY_BOOT_STACK_LIMIT - AVP_EARLY_BOOT_STACK_SIZE)
-/* Common CPU early boot stack size */
-#define CPU_EARLY_BOOT_STACK_SIZE 0x1000
-
#define EXCEP_VECTOR_CPU_RESET_VECTOR (NV_PA_EVP_BASE + 0x100)
#define CSITE_CPU_DBG0_LAR (NV_PA_CSITE_BASE + 0x10FB0)
#define CSITE_CPU_DBG1_LAR (NV_PA_CSITE_BASE + 0x12FB0)
+#define CSITE_CPU_DBG2_LAR (NV_PA_CSITE_BASE + 0x14FB0)
+#define CSITE_CPU_DBG3_LAR (NV_PA_CSITE_BASE + 0x16FB0)

#define FLOW_CTLR_HALT_COP_EVENTS (NV_PA_FLOW_BASE + 4)
#define FLOW_MODE_STOP 2
@@ -95,6 +56,23 @@
#define HALT_COP_EVENT_IRQ_1 (1 << 11)
#define HALT_COP_EVENT_FIQ_1 (1 << 9)

-void start_cpu(u32 reset_vector);
-int ap20_cpu_is_cortexa9(void);
+#define FLOW_MODE_NONE 0
+
+#define SIMPLE_PLLX (CLOCK_ID_XCPU - CLOCK_ID_FIRST_SIMPLE)
+
+struct clk_pll_table {
+ u16 n;
+ u16 m;
+ u8 p;
+ u8 cpcon;
+};
+
+void clock_enable_coresight(int enable);
+void enable_cpu_clock(int enable);
void halt_avp(void) __attribute__ ((noreturn));
+void init_pllx(int slow);
+void powerup_cpu(void);
+void reset_A9_cpu(int reset);
+void start_cpu(u32 reset_vector);
+int tegra_get_chip_type(void);
+void adjust_pllp_out_freqs(void);
diff --git a/arch/arm/cpu/arm720t/tegra-common/spl.c b/arch/arm/cpu/arm720t/tegra-common/spl.c
index c280ab7..a9a1c39 100644
--- a/arch/arm/cpu/arm720t/tegra-common/spl.c
+++ b/arch/arm/cpu/arm720t/tegra-common/spl.c
@@ -23,7 +23,6 @@
* MA 02111-1307 USA
*/
#include <common.h>
-#include "cpu.h"
#include <spl.h>

#include <asm/io.h>
@@ -32,7 +31,7 @@
#include <asm/arch/tegra.h>
#include <asm/arch-tegra/board.h>
#include <asm/arch/spl.h>
-
+#include "cpu.h"

void spl_board_init(void)
{
diff --git a/arch/arm/cpu/arm720t/tegra20/cpu.c b/arch/arm/cpu/arm720t/tegra20/cpu.c
index ef7f375..2533899 100644
--- a/arch/arm/cpu/arm720t/tegra20/cpu.c
+++ b/arch/arm/cpu/arm720t/tegra20/cpu.c
@@ -1,160 +1,25 @@
/*
-* (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
-*/
+ * Copyright (c) 2010-2012, 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/pinmux.h>
#include <asm/arch/tegra.h>
-#include <asm/arch-tegra/clk_rst.h>
#include <asm/arch-tegra/pmc.h>
-#include <asm/arch-tegra/scu.h>
#include "../tegra-common/cpu.h"

-/* Returns 1 if the current CPU executing is a Cortex-A9, else 0 */
-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);
-}
-
-void init_pllx(void)
-{
- struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
- struct clk_pll *pll = &clkrst->crc_pll[CLOCK_ID_XCPU];
- u32 reg;
-
- /* If PLLX is already enabled, just return */
- if (readl(&pll->pll_base) & PLL_ENABLE_MASK)
- return;
-
- /* Set PLLX_MISC */
- writel(1 << PLL_CPCON_SHIFT, &pll->pll_misc);
-
- /* Use 12MHz clock here */
- reg = PLL_BYPASS_MASK | (12 << PLL_DIVM_SHIFT);
- reg |= 1000 << PLL_DIVN_SHIFT;
- writel(reg, &pll->pll_base);
-
- reg |= PLL_ENABLE_MASK;
- writel(reg, &pll->pll_base);
-
- reg &= ~PLL_BYPASS_MASK;
- writel(reg, &pll->pll_base);
-}
-
-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 */
- init_pllx();
-
- /* 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 |= 1 << CPU1_CLK_STP_SHIFT;
-
- /* Stop/Unstop the CPU clock */
- clk &= ~CPU0_CLK_STP_MASK;
- clk |= !enable << CPU0_CLK_STP_SHIFT;
- 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;
@@ -173,49 +38,6 @@ static void enable_cpu_power_rail(void)
udelay(3750);
}

-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 */
@@ -246,13 +68,3 @@ void start_cpu(u32 reset_vector)
/* 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);
- }
-}
diff --git a/arch/arm/cpu/arm720t/tegra30/Makefile b/arch/arm/cpu/arm720t/tegra30/Makefile
new file mode 100644
index 0000000..bd96997
--- /dev/null
+++ b/arch/arm/cpu/arm720t/tegra30/Makefile
@@ -0,0 +1,41 @@
+#
+# 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/>.
+#
+
+include $(TOPDIR)/config.mk
+
+LIB = $(obj)lib$(SOC).o
+
+COBJS-y += cpu.o
+
+SRCS := $(COBJS-y:.o=.c)
+OBJS := $(addprefix $(obj),$(COBJS-y))
+
+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/arm720t/tegra30/config.mk b/arch/arm/cpu/arm720t/tegra30/config.mk
new file mode 100644
index 0000000..2388c56
--- /dev/null
+++ b/arch/arm/cpu/arm720t/tegra30/config.mk
@@ -0,0 +1,19 @@
+#
+# Copyright (c) 2010-2012, NVIDIA CORPORATION. All rights reserved.
+#
+# (C) Copyright 2002
+# Gary Jennejohn, DENX Software Engineering, <garyj@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/>.
+#
+USE_PRIVATE_LIBGCC = yes
diff --git a/arch/arm/cpu/arm720t/tegra30/cpu.c b/arch/arm/cpu/arm720t/tegra30/cpu.c
new file mode 100644
index 0000000..dedcdd9
--- /dev/null
+++ b/arch/arm/cpu/arm720t/tegra30/cpu.c
@@ -0,0 +1,176 @@
+/*
+ * Copyright (c) 2010-2012, 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);
+
+ /*
+ * Switch system clock to PLLP_OUT4 (108 MHz), AVP will now run
+ *@108 MHz. This is glitch free as only the source is changed, no
+ * special precaution needed.
+ */
+ val = (SCLK_SOURCE_PLLP_OUT4 << SCLK_SWAKEUP_FIQ_SOURCE_SHIFT) |
+ (SCLK_SOURCE_PLLP_OUT4 << SCLK_SWAKEUP_IRQ_SOURCE_SHIFT) |
+ (SCLK_SOURCE_PLLP_OUT4 << SCLK_SWAKEUP_RUN_SOURCE_SHIFT) |
+ (SCLK_SOURCE_PLLP_OUT4 << SCLK_SWAKEUP_IDLE_SOURCE_SHIFT) |
+ (SCLK_SYS_STATE_RUN << SCLK_SYS_STATE_SHIFT);
+ writel(val, &clkrst->crc_sclk_brst_pol);
+
+ 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) */
+ clock_ll_set_source(PERIPH_ID_MSELECT, 0);
+
+ /*
+ * 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);
+}
--
1.7.0.4