--- /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: 1.4 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 = 862, .m = 8, .p = 0, .cpcon = 8 }, /* OSC: 13.0 MHz */
+ { .n = 583, .m = 8, .p = 0, .cpcon = 4 }, /* OSC: 19.2 MHz */
+ { .n = 700, .m = 6, .p = 0, .cpcon = 8 }, /* OSC: 12.0 MHz */
+ { .n = 700, .m = 13, .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);
+ }
+}
Code Review / kvmfornfv.git / blobdiff