--- /dev/null
+/*
+ * Copyright (c) 2010-2014, 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(PMUX_PINGRP_PWR_I2C_SCL_PZ6);
+ pinmux_tristate_disable(PMUX_PINGRP_PWR_I2C_SDA_PZ7);
+
+ /*
+ * 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 & PLL_LOCK_MASK) == 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);
+
+ 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);
+
+ /*
+ * 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));
+
+ /* 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);
+ reset_set_enable(PERIPH_ID_DVFS, 0);
+
+ debug("t114_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 bool is_clamp_enabled(u32 partid)
+{
+ struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
+ u32 reg;
+
+ /* Get clamp status. */
+ reg = readl(&pmc->pmc_clamp_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))
+ ;
+
+ /* Wait for the clamp status to be cleared */
+ while (is_clamp_enabled(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 */
+ power_partition(CRAIL);
+
+ /* Power up the fast cluster non-CPU partition */
+ power_partition(C0NC);
+
+ /* Power up the fast cluster CPU0 partition */
+ power_partition(CE0);
+}
+
+void start_cpu(u32 reset_vector)
+{
+ u32 imme, inst;
+
+ 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 */
+
+ /*
+ * A01P with patched boot ROM; vector hard-coded to 0x4003fffc.
+ * See nvbug 1193357 for details.
+ */
+
+ /* mov r0, #lsb(reset_vector) */
+ imme = reset_vector & 0xffff;
+ inst = imme & 0xfff;
+ inst |= ((imme >> 12) << 16);
+ inst |= 0xe3000000;
+ writel(inst, 0x4003fff0);
+
+ /* movt r0, #msb(reset_vector) */
+ imme = (reset_vector >> 16) & 0xffff;
+ inst = imme & 0xfff;
+ inst |= ((imme >> 12) << 16);
+ inst |= 0xe3400000;
+ writel(inst, 0x4003fff4);
+
+ /* bx r0 */
+ writel(0xe12fff10, 0x4003fff8);
+
+ /* b -12 */
+ imme = (u32)-20;
+ inst = (imme >> 2) & 0xffffff;
+ inst |= 0xea000000;
+ writel(inst, 0x4003fffc);
+
+ /* Write to orignal location for compatibility */
+ writel(reset_vector, EXCEP_VECTOR_CPU_RESET_VECTOR);
+
+ /* If the CPU(s) don't already have power, power 'em up */
+ powerup_cpus();
+}
Code Review / kvmfornfv.git / blobdiff