[U-Boot] [PATCH 2/7] Tegra114: Add AVP (arm720t) files
Tom Warren
twarren.nvidia at gmail.com
Wed Jan 16 22:14:03 CET 2013
This provides SPL support for T114 boards - AVP early init, plus
CPU (A15) init/jump to main U-Boot.
Signed-off-by: Tom Warren <twarren at nvidia.com>
---
arch/arm/cpu/arm720t/tegra-common/cpu.c | 23 ++-
arch/arm/cpu/arm720t/tegra-common/cpu.h | 13 +-
arch/arm/cpu/arm720t/tegra114/Makefile | 42 ++++
arch/arm/cpu/arm720t/tegra114/config.mk | 19 ++
arch/arm/cpu/arm720t/tegra114/cpu.c | 328 +++++++++++++++++++++++++++++++
5 files changed, 411 insertions(+), 14 deletions(-)
create mode 100644 arch/arm/cpu/arm720t/tegra114/Makefile
create mode 100644 arch/arm/cpu/arm720t/tegra114/config.mk
create mode 100644 arch/arm/cpu/arm720t/tegra114/cpu.c
diff --git a/arch/arm/cpu/arm720t/tegra-common/cpu.c b/arch/arm/cpu/arm720t/tegra-common/cpu.c
index 693d584..846163c 100644
--- a/arch/arm/cpu/arm720t/tegra-common/cpu.c
+++ b/arch/arm/cpu/arm720t/tegra-common/cpu.c
@@ -40,7 +40,7 @@ enum tegra_family_t get_family(void)
chip_id = reg >> 8;
chip_id &= 0xff;
debug(" tegra_get_family: chip_id = %x\n", chip_id);
- if (chip_id == 0x30)
+ if (chip_id >= 0x30)
return TEGRA_FAMILY_T3x;
else
return TEGRA_FAMILY_T2x;
@@ -56,6 +56,7 @@ int get_num_cpus(void)
*/
struct clk_pll_table tegra_pll_x_table[TEGRA_SOC_CNT][CLOCK_OSC_FREQ_COUNT] = {
/* T20: 1 GHz */
+ /* n, m, p, cpcon */
{{ 1000, 13, 0, 12}, /* OSC 13M */
{ 625, 12, 0, 8}, /* OSC 19.2M */
{ 1000, 12, 0, 12}, /* OSC 12M */
@@ -76,11 +77,11 @@ struct clk_pll_table tegra_pll_x_table[TEGRA_SOC_CNT][CLOCK_OSC_FREQ_COUNT] = {
{ 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 */
+ /* T114: 1.4 GHz */
+ {{ 862, 8, 0, 8},
+ { 583, 8, 0, 4},
+ { 696, 12, 0, 8},
+ { 700, 13, 0, 8},
},
};
@@ -166,8 +167,8 @@ void init_pllx(void)
sel = &tegra_pll_x_table[chip_type][osc];
pllx_set_rate(pll, sel->n, sel->m, sel->p, sel->cpcon);
- /* adjust PLLP_out1-4 on T30 */
- if (chip_type == TEGRA_SOC_T30) {
+ /* adjust PLLP_out1-4 on T30/T114 */
+ if (chip_type >= TEGRA_SOC_T30) {
debug(" init_pllx: adjusting PLLP out freqs\n");
adjust_pllp_out_freqs();
}
@@ -203,7 +204,7 @@ void enable_cpu_clock(int enable)
*/
clk = readl(&clkrst->crc_clk_cpu_cmplx);
clk |= 1 << CPU1_CLK_STP_SHIFT;
-#if defined(CONFIG_TEGRA30)
+#if defined(CONFIG_TEGRA30) || defined(CONFIG_TEGRA114)
clk |= 1 << CPU2_CLK_STP_SHIFT;
clk |= 1 << CPU3_CLK_STP_SHIFT;
#endif
@@ -308,7 +309,7 @@ void clock_enable_coresight(int enable)
* 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)
+ if (tegra_get_chip_type() >= TEGRA_SOC_T30)
src = CLK_DIVIDER(NVBL_PLLP_KHZ, 204000);
else
src = CLK_DIVIDER(NVBL_PLLP_KHZ, 144000);
@@ -318,7 +319,7 @@ void clock_enable_coresight(int enable)
rst = CORESIGHT_UNLOCK;
writel(rst, CSITE_CPU_DBG0_LAR);
writel(rst, CSITE_CPU_DBG1_LAR);
-#if defined(CONFIG_TEGRA30)
+#if defined(CONFIG_TEGRA30) || defined(CONFIG_TEGRA114)
writel(rst, CSITE_CPU_DBG2_LAR);
writel(rst, CSITE_CPU_DBG3_LAR);
#endif
diff --git a/arch/arm/cpu/arm720t/tegra-common/cpu.h b/arch/arm/cpu/arm720t/tegra-common/cpu.h
index 3e2ea3a..45b346d 100644
--- a/arch/arm/cpu/arm720t/tegra-common/cpu.h
+++ b/arch/arm/cpu/arm720t/tegra-common/cpu.h
@@ -22,14 +22,21 @@
*/
#include <asm/types.h>
+#ifndef TRUE
+#define TRUE 1
+#endif
+#ifndef FALSE
+#define FALSE 0
+#endif
+
/* Stabilization delays, in usec */
#define PLL_STABILIZATION_DELAY (300)
#define IO_STABILIZATION_DELAY (1000)
-#if defined(CONFIG_TEGRA30)
-#define NVBL_PLLP_KHZ (408000)
-#else /* Tegra20 */
+#if defined(CONFIG_TEGRA20)
#define NVBL_PLLP_KHZ (216000)
+#else /* Tegra30/Tegra114 */
+#define NVBL_PLLP_KHZ (408000)
#endif
#define PLLX_ENABLED (1 << 30)
diff --git a/arch/arm/cpu/arm720t/tegra114/Makefile b/arch/arm/cpu/arm720t/tegra114/Makefile
new file mode 100644
index 0000000..157d85a
--- /dev/null
+++ b/arch/arm/cpu/arm720t/tegra114/Makefile
@@ -0,0 +1,42 @@
+#
+# Copyright (c) 2010-2012, NVIDIA CORPORATION. All rights reserved.
+#
+# (C) Copyright 2000-2008
+# Wolfgang Denk, DENX Software Engineering, wd at 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 t11x.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/tegra114/config.mk b/arch/arm/cpu/arm720t/tegra114/config.mk
new file mode 100644
index 0000000..2388c56
--- /dev/null
+++ b/arch/arm/cpu/arm720t/tegra114/config.mk
@@ -0,0 +1,19 @@
+#
+# Copyright (c) 2010-2012, NVIDIA CORPORATION. All rights reserved.
+#
+# (C) Copyright 2002
+# Gary Jennejohn, DENX Software Engineering, <garyj at 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/tegra114/cpu.c b/arch/arm/cpu/arm720t/tegra114/cpu.c
new file mode 100644
index 0000000..9527495
--- /dev/null
+++ b/arch/arm/cpu/arm720t/tegra114/cpu.c
@@ -0,0 +1,328 @@
+/*
+ * 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/pinmux.h>
+#include <asm/arch/tegra.h>
+#include <asm/arch-tegra/clk_rst.h>
+#include <asm/arch-tegra/pmc.h>
+#include "../tegra-common/cpu.h"
+
+/* Tegra114-specific CPU init code */
+static void enable_cpu_power_rail(void)
+{
+ struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
+ struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
+ u32 reg;
+
+ debug("enable_cpu_power_rail entry\n");
+
+ /* un-tristate PWR_I2C SCL/SDA, rest of the defaults are correct */
+ pinmux_tristate_disable(PINGRP_PWR_I2C_SCL);
+ pinmux_tristate_disable(PINGRP_PWR_I2C_SDA);
+
+ /*
+ * Set CPUPWRGOOD_TIMER - APB clock is 1/2 of SCLK (102MHz),
+ * set it for 25ms (102MHz * .025)
+ */
+ reg = 0x26E8F0;
+ writel(reg, &pmc->pmc_cpupwrgood_timer);
+
+ /* Set polarity to 0 (normal) and enable CPUPWRREQ_OE */
+ reg = readl(&pmc->pmc_cntrl);
+ reg &= ~(CPUPWRREQ_POL);
+ reg |= CPUPWRREQ_OE;
+ writel(reg, &pmc->pmc_cntrl);
+
+ /*
+ * Set CLK_RST_CONTROLLER_CPU_SOFTRST_CTRL2_0_CAR2PMC_CPU_ACK_WIDTH
+ * to 408 to satisfy the requirement of having at least 16 CPU clock
+ * cycles before clamp removal.
+ */
+
+ reg = readl(&clkrst->crc_cpu_softrst_ctrl2);
+ reg &= 0xFFFFF000; /* bits 11:0 */
+ reg |= 408;
+ writel(reg, &clkrst->crc_cpu_softrst_ctrl2);
+}
+
+static void enable_cpu_clocks(void)
+{
+ struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
+ u32 reg;
+
+ debug("enable_cpu_clocks entry\n");
+
+ /* Wait for PLL-X to lock */
+ do {
+ reg = readl(&clkrst->crc_pll_simple[SIMPLE_PLLX].pll_base);
+ } while ((reg & (1 << 27)) == 0);
+
+ /* 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);
+
+ /* Always enable the main CPU complex clocks */
+ clock_enable(PERIPH_ID_CPU);
+ clock_enable(PERIPH_ID_CPULP);
+ clock_enable(PERIPH_ID_CPUG);
+}
+
+static void remove_cpu_resets(void)
+{
+ struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
+ u32 reg;
+
+ debug("remove_cpu_resets entry\n");
+ /* Take the slow non-CPU partition out of reset */
+ reg = readl(&clkrst->crc_rst_cpulp_cmplx_clr);
+ writel((reg | CLR_NONCPURESET), &clkrst->crc_rst_cpulp_cmplx_clr);
+
+ /* Take the fast non-CPU partition out of reset */
+ reg = readl(&clkrst->crc_rst_cpug_cmplx_clr);
+ writel((reg | CLR_NONCPURESET), &clkrst->crc_rst_cpug_cmplx_clr);
+
+ /* Clear the SW-controlled reset of the slow cluster */
+ reg = readl(&clkrst->crc_rst_cpulp_cmplx_clr);
+ reg |= (CLR_CPURESET0+CLR_DBGRESET0+CLR_CORERESET0+CLR_CXRESET0);
+ writel(reg, &clkrst->crc_rst_cpulp_cmplx_clr);
+
+ /* Clear the SW-controlled reset of the fast cluster */
+ reg = readl(&clkrst->crc_rst_cpug_cmplx_clr);
+ reg |= (CLR_CPURESET0+CLR_DBGRESET0+CLR_CORERESET0+CLR_CXRESET0);
+ reg |= (CLR_CPURESET1+CLR_DBGRESET1+CLR_CORERESET1+CLR_CXRESET1);
+ reg |= (CLR_CPURESET2+CLR_DBGRESET2+CLR_CORERESET2+CLR_CXRESET2);
+ reg |= (CLR_CPURESET3+CLR_DBGRESET3+CLR_CORERESET3+CLR_CXRESET3);
+ writel(reg, &clkrst->crc_rst_cpug_cmplx_clr);
+}
+
+/**
+ * The T114 requires some special clock initialization, including setting up
+ * the DVC I2C, turning on MSELECT and selecting the G CPU cluster
+ */
+void t114_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("t114_init_clocks entry\n");
+
+ /* Set active CPU cluster to G */
+ clrbits_le32(&flow->cluster_control, 1);
+
+ /*
+ * Switch system clock to PLLP_OUT4 (108 MHz), AVP will now run
+ * at 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);
+
+ debug("Setting up PLLX\n");
+ init_pllx();
+
+ 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);
+
+ /* Enable clocks to required peripherals. TBD - minimize this list */
+ debug("Enabling clocks\n");
+
+ clock_set_enable(PERIPH_ID_CACHE2, 1);
+ clock_set_enable(PERIPH_ID_GPIO, 1);
+ clock_set_enable(PERIPH_ID_TMR, 1);
+ clock_set_enable(PERIPH_ID_RTC, 1);
+ clock_set_enable(PERIPH_ID_CPU, 1);
+ clock_set_enable(PERIPH_ID_EMC, 1);
+ clock_set_enable(PERIPH_ID_I2C5, 1);
+ clock_set_enable(PERIPH_ID_FUSE, 1);
+ clock_set_enable(PERIPH_ID_PMC, 1);
+ clock_set_enable(PERIPH_ID_APBDMA, 1);
+ clock_set_enable(PERIPH_ID_MEM, 1);
+ clock_set_enable(PERIPH_ID_IRAMA, 1);
+ clock_set_enable(PERIPH_ID_IRAMB, 1);
+ clock_set_enable(PERIPH_ID_IRAMC, 1);
+ clock_set_enable(PERIPH_ID_IRAMD, 1);
+ clock_set_enable(PERIPH_ID_CORESIGHT, 1);
+ clock_set_enable(PERIPH_ID_MSELECT, 1);
+ clock_set_enable(PERIPH_ID_EMC1, 1);
+ clock_set_enable(PERIPH_ID_MC1, 1);
+ clock_set_enable(PERIPH_ID_DVFS, 1);
+
+ /* Switch MSELECT clock to PLLP (00) */
+ clock_ll_set_source(PERIPH_ID_MSELECT, 0);
+
+ /*
+ * Clock divider request for 102MHz would setup MSELECT clock as
+ * 102MHz for PLLP base 408MHz
+ */
+ clock_ll_set_source_divisor(PERIPH_ID_MSELECT, 0,
+ (NVBL_PLLP_KHZ/102000));
+
+ /* I2C5 (DVC) gets CLK_M and a divisor of 17 */
+ clock_ll_set_source_divisor(PERIPH_ID_I2C5, 3, 16);
+
+ /* Give clocks time to stabilize */
+ udelay(1000);
+
+ /* Take required peripherals out of reset */
+ debug("Taking periphs out of reset\n");
+ reset_set_enable(PERIPH_ID_CACHE2, 0);
+ reset_set_enable(PERIPH_ID_GPIO, 0);
+ reset_set_enable(PERIPH_ID_TMR, 0);
+ reset_set_enable(PERIPH_ID_COP, 0);
+ reset_set_enable(PERIPH_ID_EMC, 0);
+ reset_set_enable(PERIPH_ID_I2C5, 0);
+ reset_set_enable(PERIPH_ID_FUSE, 0);
+ reset_set_enable(PERIPH_ID_APBDMA, 0);
+ reset_set_enable(PERIPH_ID_MEM, 0);
+ reset_set_enable(PERIPH_ID_CORESIGHT, 0);
+ reset_set_enable(PERIPH_ID_MSELECT, 0);
+ reset_set_enable(PERIPH_ID_EMC1, 0);
+ reset_set_enable(PERIPH_ID_MC1, 0);
+
+ debug("t114_init_clocks exit\n");
+}
+
+static int get_cluster_id(void)
+{
+ struct flow_ctlr *flow = (struct flow_ctlr *)NV_PA_FLOW_BASE;
+
+ debug("%s: id = %08X\n", __func__, readl(&flow->cluster_control));
+ /* Return ACTIVE bit (bit0) which is 0 for G and 1 for LP */
+ return readl(&flow->cluster_control) & 1;
+}
+
+static int is_partition_powered(u32 mask)
+{
+ struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
+ u32 reg;
+
+ /* Get power gate status */
+ reg = readl(&pmc->pmc_pwrgate_status);
+ if ((reg & mask) == mask)
+ return TRUE;
+
+ return FALSE;
+}
+
+static int is_clamp_removed(u32 mask)
+{
+ struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
+ u32 reg;
+
+ /* Get clamp status. TODO: Add pmc_clamp_status alias to pmc.h */
+ reg = readl(&pmc->pmc_pwrgate_timer_on);
+ if ((reg & mask) == mask)
+ return FALSE;
+
+ return TRUE;
+}
+
+static void power_partition(u32 status, u32 partid)
+{
+ struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
+
+ debug("%s: status = %08X, part ID = %08X\n", __func__, status, partid);
+ /* Is the partition already on? */
+ if (!is_partition_powered(status)) {
+ /* No, toggle the partition power state (OFF -> ON) */
+ debug("power_partition, toggling state\n");
+ clrbits_le32(&pmc->pmc_pwrgate_toggle, 0x1F);
+ setbits_le32(&pmc->pmc_pwrgate_toggle, partid);
+ setbits_le32(&pmc->pmc_pwrgate_toggle, START_CP);
+
+ /* Wait for the power to come up */
+ while (!is_partition_powered(status))
+ ;
+
+ /* Wait for the clamp status to be cleared */
+ while (!is_clamp_removed(status))
+ ;
+
+ /* Give I/O signals time to stabilize */
+ udelay(IO_STABILIZATION_DELAY);
+ }
+}
+
+void powerup_cpus(void)
+{
+ debug("powerup_cpus entry\n");
+
+ /* Are we booting to the fast cluster? */
+ if (get_cluster_id() == 0) {
+ debug("powerup_cpus entry: G cluster\n");
+ /* Power up the fast cluster rail partition */
+ power_partition(CRAIL, CRAILID);
+
+ /* Power up the fast cluster non-CPU partition */
+ power_partition(C0NC, C0NCID);
+
+ /* Power up the fast cluster CPU0 partition */
+ power_partition(CE0, CE0ID);
+ } else {
+ debug("powerup_cpus entry: LP cluster\n");
+ /* Power up the slow cluster non-CPU partition */
+ power_partition(C1NC, C1NCID);
+
+ /* Power up the slow cluster CPU partition */
+ power_partition(CELP, CELPID);
+ }
+}
+
+void start_cpu(u32 reset_vector)
+{
+ debug("start_cpu entry, reset_vector = %x\n", reset_vector);
+
+ t114_init_clocks();
+
+ /* Enable VDD_CPU */
+ enable_cpu_power_rail();
+
+ /* Get the CPU(s) running */
+ enable_cpu_clocks();
+
+ /* Enable CoreSight */
+ clock_enable_coresight(1);
+
+ /* Take CPU(s) out of reset */
+ remove_cpu_resets();
+
+ /*
+ * 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);
+
+ /* If the CPU(s) don't already have power, power 'em up */
+ powerup_cpus();
+}
--
1.7.0.4
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