+++ /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/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"
-
-int get_num_cpus(void)
-{
- 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;
- }
-}
-
-/*
- * 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
- *
- * Register Field Bits Width
- * ------------------------------
- * PLLX_BASE p 22:20 3
- * PLLX_BASE n 17: 8 10
- * PLLX_BASE m 4: 0 5
- * PLLX_MISC cpcon 11: 8 4
- */
- {
- { .n = 1000, .m = 13, .p = 0, .cpcon = 12 }, /* OSC: 13.0 MHz */
- { .n = 625, .m = 12, .p = 0, .cpcon = 8 }, /* OSC: 19.2 MHz */
- { .n = 1000, .m = 12, .p = 0, .cpcon = 12 }, /* OSC: 12.0 MHz */
- { .n = 1000, .m = 26, .p = 0, .cpcon = 12 }, /* OSC: 26.0 MHz */
- },
- /*
- * T25: 1.2 GHz
- *
- * Register Field Bits Width
- * ------------------------------
- * PLLX_BASE p 22:20 3
- * PLLX_BASE n 17: 8 10
- * PLLX_BASE m 4: 0 5
- * PLLX_MISC cpcon 11: 8 4
- */
- {
- { .n = 923, .m = 10, .p = 0, .cpcon = 12 }, /* OSC: 13.0 MHz */
- { .n = 750, .m = 12, .p = 0, .cpcon = 8 }, /* OSC: 19.2 MHz */
- { .n = 600, .m = 6, .p = 0, .cpcon = 12 }, /* OSC: 12.0 MHz */
- { .n = 600, .m = 13, .p = 0, .cpcon = 12 }, /* OSC: 26.0 MHz */
- },
- /*
- * T30: 600 MHz
- *
- * Register Field Bits Width
- * ------------------------------
- * PLLX_BASE p 22:20 3
- * PLLX_BASE n 17: 8 10
- * PLLX_BASE m 4: 0 5
- * PLLX_MISC cpcon 11: 8 4
- */
- {
- { .n = 600, .m = 13, .p = 0, .cpcon = 8 }, /* OSC: 13.0 MHz */
- { .n = 500, .m = 16, .p = 0, .cpcon = 8 }, /* OSC: 19.2 MHz */
- { .n = 600, .m = 12, .p = 0, .cpcon = 8 }, /* OSC: 12.0 MHz */
- { .n = 600, .m = 26, .p = 0, .cpcon = 8 }, /* OSC: 26.0 MHz */
- },
- /*
- * T114: 700 MHz
- *
- * Register Field Bits Width
- * ------------------------------
- * PLLX_BASE p 23:20 4
- * PLLX_BASE n 15: 8 8
- * PLLX_BASE m 7: 0 8
- */
- {
- { .n = 108, .m = 1, .p = 1 }, /* OSC: 13.0 MHz */
- { .n = 73, .m = 1, .p = 1 }, /* OSC: 19.2 MHz */
- { .n = 116, .m = 1, .p = 1 }, /* OSC: 12.0 MHz */
- { .n = 108, .m = 2, .p = 1 }, /* OSC: 26.0 MHz */
- },
-
- /*
- * T124: 700 MHz
- *
- * Register Field Bits Width
- * ------------------------------
- * PLLX_BASE p 23:20 4
- * PLLX_BASE n 15: 8 8
- * PLLX_BASE m 7: 0 8
- */
- {
- { .n = 108, .m = 1, .p = 1 }, /* OSC: 13.0 MHz */
- { .n = 73, .m = 1, .p = 1 }, /* OSC: 19.2 MHz */
- { .n = 116, .m = 1, .p = 1 }, /* OSC: 12.0 MHz */
- { .n = 108, .m = 2, .p = 1 }, /* OSC: 26.0 MHz */
- },
-};
-
-static inline void pllx_set_iddq(void)
-{
-#if defined(CONFIG_TEGRA124)
- struct clk_rst_ctlr *clkrst = (struct clk_rst_ctlr *)NV_PA_CLK_RST_BASE;
- u32 reg;
-
- /* Disable IDDQ */
- reg = readl(&clkrst->crc_pllx_misc3);
- reg &= ~PLLX_IDDQ_MASK;
- writel(reg, &clkrst->crc_pllx_misc3);
- udelay(2);
- debug("%s: IDDQ: PLLX IDDQ = 0x%08X\n", __func__,
- readl(&clkrst->crc_pllx_misc3));
-#endif
-}
-
-int pllx_set_rate(struct clk_pll_simple *pll , u32 divn, u32 divm,
- u32 divp, u32 cpcon)
-{
- int chip = tegra_get_chip();
- 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");
-
- pllx_set_iddq();
-
- /* 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 */
- if (chip == CHIPID_TEGRA20 || chip == CHIPID_TEGRA30)
- reg = (cpcon << PLL_CPCON_SHIFT);
- else
- reg = 0;
-
- /* Set dccon to PLLX_MISC if freq > 600MHz */
- if (divn > 600)
- reg |= (1 << PLL_DCCON_SHIFT);
- writel(reg, &pll->pll_misc);
-
- /* Disable BYPASS */
- reg = readl(&pll->pll_base);
- reg &= ~PLL_BYPASS_MASK;
- writel(reg, &pll->pll_base);
- debug("pllx_set_rate: base = 0x%08X\n", reg);
-
- /* Set lock_enable to PLLX_MISC */
- reg = readl(&pll->pll_misc);
- reg |= PLL_LOCK_ENABLE_MASK;
- writel(reg, &pll->pll_misc);
- debug("pllx_set_rate: misc = 0x%08X\n", reg);
-
- /* Enable PLLX last, once it's all configured */
- reg = readl(&pll->pll_base);
- reg |= PLL_ENABLE_MASK;
- writel(reg, &pll->pll_base);
- debug("pllx_set_rate: base final = 0x%08X\n", reg);
-
- return 0;
-}
-
-void init_pllx(void)
-{
- 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 soc_type, sku_info, chip_sku;
- enum clock_osc_freq osc;
- struct clk_pll_table *sel;
-
- debug("init_pllx entry\n");
-
- /* get SOC (chip) type */
- soc_type = tegra_get_chip();
- debug(" init_pllx: SoC = 0x%02X\n", soc_type);
-
- /* get SKU info */
- sku_info = tegra_get_sku_info();
- debug(" init_pllx: SKU info byte = 0x%02X\n", sku_info);
-
- /* get chip SKU, combo of the above info */
- chip_sku = tegra_get_chip_sku();
- debug(" init_pllx: Chip SKU = %d\n", chip_sku);
-
- /* get osc freq */
- osc = clock_get_osc_freq();
- debug(" init_pllx: osc = %d\n", osc);
-
- /* set pllx */
- sel = &tegra_pll_x_table[chip_sku][osc];
- pllx_set_rate(pll, sel->n, sel->m, sel->p, sel->cpcon);
-}
-
-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();
-
- /* 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 (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;
- 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 = 2;
-
- 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 and divide it down as per
- * PLLP base frequency based on SoC type (T20/T30+).
- * Clock divider request would setup CSITE clock as 144MHz
- * for PLLP base 216MHz and 204MHz for PLLP base 408MHz
- */
- src = CLK_DIVIDER(NVBL_PLLP_KHZ, CSITE_KHZ);
- 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 (get_num_cpus() == 4) {
- writel(rst, CSITE_CPU_DBG2_LAR);
- writel(rst, CSITE_CPU_DBG3_LAR);
- }
- }
-}
-
-void halt_avp(void)
-{
- for (;;) {
- writel(HALT_COP_EVENT_JTAG | (FLOW_MODE_STOP << 29),
- FLOW_CTLR_HALT_COP_EVENTS);
- }
-}
projects / karo-tx-uboot.git / blobdiff