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@nvidia.com --- Changes in v2: - update all new copyright header dates to 2013 - use CHIPID directly to figure num cpus - set CPU2/3 bits at runtime using num cpus instead of ifdef - remove private TRUE/FALSE defines, not needed now - clrbits/setbits_le32 used instead of reg read/&/|/write Changes in v3: - only need to powerup the fast cluster
arch/arm/cpu/arm720t/tegra-common/cpu.c | 75 ++++---- arch/arm/cpu/arm720t/tegra-common/cpu.h | 8 +- arch/arm/cpu/arm720t/tegra114/Makefile | 42 +++++ arch/arm/cpu/arm720t/tegra114/config.mk | 19 ++ arch/arm/cpu/arm720t/tegra114/cpu.c | 297 +++++++++++++++++++++++++++++++ 5 files changed, 403 insertions(+), 38 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 c32925b..119342e 100644 --- a/arch/arm/cpu/arm720t/tegra-common/cpu.c +++ b/arch/arm/cpu/arm720t/tegra-common/cpu.c @@ -25,30 +25,24 @@ #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; + struct apb_misc_gp_ctlr *gp; + uint rev; + + gp = (struct apb_misc_gp_ctlr *)NV_PA_APB_MISC_GP_BASE; + rev = (readl(&gp->hidrev) & HIDREV_CHIPID_MASK) >> HIDREV_CHIPID_SHIFT; + + switch (rev) { + case CHIPID_TEGRA20: + return 2; + break; + case CHIPID_TEGRA30: + case CHIPID_TEGRA114: + default: + return 4; + break; + } }
/* @@ -56,6 +50,7 @@ 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 */ @@ -75,6 +70,13 @@ struct clk_pll_table tegra_pll_x_table[TEGRA_SOC_CNT][CLOCK_OSC_FREQ_COUNT] = { { 700, 6, 0, 8}, { 700, 13, 0, 8}, }, + + /* T114: 1.4 GHz */ + {{ 862, 8, 0, 8}, + { 583, 8, 0, 4}, + { 696, 12, 0, 8}, + { 700, 13, 0, 8}, + }, };
void adjust_pllp_out_freqs(void) @@ -159,8 +161,8 @@ 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 || chip_type == TEGRA_SOC_T114) { debug(" init_pllx: adjusting PLLP out freqs\n"); adjust_pllp_out_freqs(); } @@ -196,10 +198,9 @@ void enable_cpu_clock(int enable) */ 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 + if (get_num_cpus() == 4) + clk |= (1 << CPU2_CLK_STP_SHIFT) + (1 << CPU3_CLK_STP_SHIFT); + /* Stop/Unstop the CPU clock */ clk &= ~CPU0_CLK_STP_MASK; clk |= !enable << CPU0_CLK_STP_SHIFT; @@ -285,7 +286,8 @@ void reset_A9_cpu(int reset)
void clock_enable_coresight(int enable) { - u32 rst, src; + u32 rst, src = 2; + int chip;
debug("clock_enable_coresight entry\n"); clock_set_enable(PERIPH_ID_CORESIGHT, enable); @@ -301,20 +303,23 @@ 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) + chip = tegra_get_chip_type(); + if (chip == TEGRA_SOC_T30 || chip == TEGRA_SOC_T114) src = CLK_DIVIDER(NVBL_PLLP_KHZ, 204000); - else + else if (chip == TEGRA_SOC_T20 || chip == TEGRA_SOC_T25) src = CLK_DIVIDER(NVBL_PLLP_KHZ, 144000); + else + printf("%s: Unknown chip type %X!\n", __func__, chip); 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 + if (get_num_cpus() == 4) { + writel(rst, CSITE_CPU_DBG2_LAR); + writel(rst, CSITE_CPU_DBG3_LAR); + } } }
diff --git a/arch/arm/cpu/arm720t/tegra-common/cpu.h b/arch/arm/cpu/arm720t/tegra-common/cpu.h index 3e2ea3a..e8e05d7 100644 --- a/arch/arm/cpu/arm720t/tegra-common/cpu.h +++ b/arch/arm/cpu/arm720t/tegra-common/cpu.h @@ -26,10 +26,12 @@ #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) +#elif defined(CONFIG_TEGRA30) || defined(CONFIG_TEGRA114) +#define NVBL_PLLP_KHZ (408000) +#else +#error "Unknown Tegra chip!" #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..6cf7fe9 --- /dev/null +++ b/arch/arm/cpu/arm720t/tegra114/Makefile @@ -0,0 +1,42 @@ +# +# Copyright (c) 2010-2013, 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 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..7947b50 --- /dev/null +++ b/arch/arm/cpu/arm720t/tegra114/config.mk @@ -0,0 +1,19 @@ +# +# Copyright (c) 2010-2013, 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/tegra114/cpu.c b/arch/arm/cpu/arm720t/tegra114/cpu.c new file mode 100644 index 0000000..5962e15 --- /dev/null +++ b/arch/arm/cpu/arm720t/tegra114/cpu.c @@ -0,0 +1,297 @@ +/* + * Copyright (c) 2010-2013, 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 */ + clrbits_le32(&pmc->pmc_cntrl, CPUPWRREQ_POL); + setbits_le32(&pmc->pmc_cntrl, CPUPWRREQ_OE); + + /* + * 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. + */ + + clrbits_le32(&clkrst->crc_cpu_softrst_ctrl2, 0xFFF); + setbits_le32(&clkrst->crc_cpu_softrst_ctrl2, 408); +} + +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 = (1 << CLK_SYS_RATE_AHB_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 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); + return (reg & mask) == mask; +} + +static int is_clamp_enabled(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); + return (reg & mask) == mask; +} + +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_enabled(status)) + ; + + /* Give I/O signals time to stabilize */ + udelay(IO_STABILIZATION_DELAY); + } +} + +void powerup_cpus(void) +{ + debug("powerup_cpus entry\n"); + + /* We boot to the fast cluster */ + 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); +} + +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(); +}