+++ /dev/null
-/*
- * (C) Copyright 2013
- * NVIDIA Corporation <www.nvidia.com>
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
-
-#include <common.h>
-#include <asm/io.h>
-#include <asm/arch/ahb.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 <asm/arch-tegra/ap.h>
-#include "../tegra-common/cpu.h"
-
-/* Tegra124-specific CPU init code */
-
-static void enable_cpu_power_rail(void)
-{
- struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
-
- debug("enable_cpu_power_rail entry\n");
-
- /* un-tristate PWR_I2C SCL/SDA, rest of the defaults are correct */
- pinmux_tristate_disable(PMUX_PINGRP_PWR_I2C_SCL_PZ6);
- pinmux_tristate_disable(PMUX_PINGRP_PWR_I2C_SDA_PZ7);
-
- pmic_enable_cpu_vdd();
-
- /*
- * Set CPUPWRGOOD_TIMER - APB clock is 1/2 of SCLK (102MHz),
- * set it for 5ms as per SysEng (102MHz*5ms = 510000 (7C830h).
- */
- writel(0x7C830, &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);
-}
-
-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);
- debug("%s: PLLX base = 0x%08X\n", __func__, reg);
- } while ((reg & PLL_LOCK_MASK) == 0);
-
- debug("%s: PLLX locked, delay for stable clocks\n", __func__);
- /* Wait until all clocks are stable */
- udelay(PLL_STABILIZATION_DELAY);
-
- debug("%s: Setting CCLK_BURST and DIVIDER\n", __func__);
- writel(CCLK_BURST_POLICY, &clkrst->crc_cclk_brst_pol);
- writel(SUPER_CCLK_DIVIDER, &clkrst->crc_super_cclk_div);
-
- debug("%s: Enabling clock to all CPUs\n", __func__);
- /* Enable the clock to all CPUs */
- reg = CLR_CPU3_CLK_STP | CLR_CPU2_CLK_STP | CLR_CPU1_CLK_STP |
- CLR_CPU0_CLK_STP;
- writel(reg, &clkrst->crc_clk_cpu_cmplx_clr);
-
- debug("%s: Enabling main CPU complex clocks\n", __func__);
- /* Always enable the main CPU complex clocks */
- clock_enable(PERIPH_ID_CPU);
- clock_enable(PERIPH_ID_CPULP);
- clock_enable(PERIPH_ID_CPUG);
-
- debug("%s: Done\n", __func__);
-}
-
-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 and fast partitions out of reset */
- reg = CLR_NONCPURESET;
- writel(reg, &clkrst->crc_rst_cpulp_cmplx_clr);
- writel(reg, &clkrst->crc_rst_cpug_cmplx_clr);
-
- /* Clear the SW-controlled reset of the slow cluster */
- reg = CLR_CPURESET0 | CLR_DBGRESET0 | CLR_CORERESET0 | CLR_CXRESET0 |
- CLR_L2RESET | CLR_PRESETDBG;
- writel(reg, &clkrst->crc_rst_cpulp_cmplx_clr);
-
- /* Clear the SW-controlled reset of the fast cluster */
- reg = CLR_CPURESET0 | CLR_DBGRESET0 | CLR_CORERESET0 | CLR_CXRESET0 |
- CLR_CPURESET1 | CLR_DBGRESET1 | CLR_CORERESET1 | CLR_CXRESET1 |
- CLR_CPURESET2 | CLR_DBGRESET2 | CLR_CORERESET2 | CLR_CXRESET2 |
- CLR_CPURESET3 | CLR_DBGRESET3 | CLR_CORERESET3 | CLR_CXRESET3 |
- CLR_L2RESET | CLR_PRESETDBG;
- writel(reg, &clkrst->crc_rst_cpug_cmplx_clr);
-}
-
-/**
- * The Tegra124 requires some special clock initialization, including setting up
- * the DVC I2C, turning on MSELECT and selecting the G CPU cluster
- */
-void tegra124_init_clocks(void)
-{
- struct flow_ctlr *flow = (struct flow_ctlr *)NV_PA_FLOW_BASE;
- 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 val;
-
- debug("tegra124_init_clocks entry\n");
-
- /* Set active CPU cluster to G */
- clrbits_le32(&flow->cluster_control, 1);
-
- /* Change the oscillator drive strength */
- val = readl(&clkrst->crc_osc_ctrl);
- val &= ~OSC_XOFS_MASK;
- val |= (OSC_DRIVE_STRENGTH << OSC_XOFS_SHIFT);
- writel(val, &clkrst->crc_osc_ctrl);
-
- /* Update same value in PMC_OSC_EDPD_OVER XOFS field for warmboot */
- val = readl(&pmc->pmc_osc_edpd_over);
- val &= ~PMC_XOFS_MASK;
- val |= (OSC_DRIVE_STRENGTH << PMC_XOFS_SHIFT);
- writel(val, &pmc->pmc_osc_edpd_over);
-
- /* Set HOLD_CKE_LOW_EN to 1 */
- setbits_le32(&pmc->pmc_cntrl2, HOLD_CKE_LOW_EN);
-
- 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_CPU, 1);
- clock_set_enable(PERIPH_ID_EMC, 1);
- clock_set_enable(PERIPH_ID_I2C5, 1);
- clock_set_enable(PERIPH_ID_APBDMA, 1);
- clock_set_enable(PERIPH_ID_MEM, 1);
- clock_set_enable(PERIPH_ID_CORESIGHT, 1);
- clock_set_enable(PERIPH_ID_MSELECT, 1);
- clock_set_enable(PERIPH_ID_DVFS, 1);
-
- /*
- * Set MSELECT clock source as PLLP (00), and ask for a clock
- * divider that would set the MSELECT clock at 102MHz for a
- * PLLP base of 408MHz.
- */
- clock_ll_set_source_divisor(PERIPH_ID_MSELECT, 0,
- CLK_DIVIDER(NVBL_PLLP_KHZ, 102000));
-
- /* Give clock time to stabilize */
- udelay(IO_STABILIZATION_DELAY);
-
- /* I2C5 (DVC) gets CLK_M and a divisor of 17 */
- clock_ll_set_source_divisor(PERIPH_ID_I2C5, 3, 16);
-
- /* Give clock time to stabilize */
- udelay(IO_STABILIZATION_DELAY);
-
- /* 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_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_DVFS, 0);
-
- debug("tegra124_init_clocks exit\n");
-}
-
-static bool is_partition_powered(u32 partid)
-{
- 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 & (1 << partid));
-}
-
-static void power_partition(u32 partid)
-{
- struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
-
- debug("%s: part ID = %08X\n", __func__, partid);
- /* Is the partition already on? */
- if (!is_partition_powered(partid)) {
- /* No, toggle the partition power state (OFF -> ON) */
- debug("power_partition, toggling state\n");
- writel(START_CP | partid, &pmc->pmc_pwrgate_toggle);
-
- /* Wait for the power to come up */
- while (!is_partition_powered(partid))
- ;
-
- /* 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 */
- debug("powerup_cpus: CRAIL\n");
- power_partition(CRAIL);
-
- /* Power up the fast cluster non-CPU partition */
- debug("powerup_cpus: C0NC\n");
- power_partition(C0NC);
-
- /* Power up the fast cluster CPU0 partition */
- debug("powerup_cpus: CE0\n");
- power_partition(CE0);
-
- debug("powerup_cpus: done\n");
-}
-
-void start_cpu(u32 reset_vector)
-{
- struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
-
- debug("start_cpu entry, reset_vector = %x\n", reset_vector);
-
- tegra124_init_clocks();
-
- /* Set power-gating timer multiplier */
- writel((MULT_8 << TIMER_MULT_SHIFT) | (MULT_8 << TIMER_MULT_CPU_SHIFT),
- &pmc->pmc_pwrgate_timer_mult);
-
- enable_cpu_power_rail();
- enable_cpu_clocks();
- clock_enable_coresight(1);
- remove_cpu_resets();
- writel(reset_vector, EXCEP_VECTOR_CPU_RESET_VECTOR);
- powerup_cpus();
- debug("start_cpu exit, should continue @ reset_vector\n");
-}
projects / karo-tx-uboot.git / blobdiff