[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/arch/arm/mach-tegra/pm.c b/src/kernel/linux/v4.14/arch/arm/mach-tegra/pm.c
new file mode 100644
index 0000000..1ad5719
--- /dev/null
+++ b/src/kernel/linux/v4.14/arch/arm/mach-tegra/pm.c
@@ -0,0 +1,400 @@
+/*
+ * CPU complex suspend & resume functions for Tegra SoCs
+ *
+ * Copyright (c) 2009-2012, 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 <linux/clk/tegra.h>
+#include <linux/cpumask.h>
+#include <linux/cpu_pm.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/suspend.h>
+
+#include <soc/tegra/flowctrl.h>
+#include <soc/tegra/fuse.h>
+#include <soc/tegra/pm.h>
+#include <soc/tegra/pmc.h>
+
+#include <asm/cacheflush.h>
+#include <asm/idmap.h>
+#include <asm/proc-fns.h>
+#include <asm/smp_plat.h>
+#include <asm/suspend.h>
+#include <asm/tlbflush.h>
+
+#include "iomap.h"
+#include "pm.h"
+#include "reset.h"
+#include "sleep.h"
+
+#ifdef CONFIG_PM_SLEEP
+static DEFINE_SPINLOCK(tegra_lp2_lock);
+static u32 iram_save_size;
+static void *iram_save_addr;
+struct tegra_lp1_iram tegra_lp1_iram;
+void (*tegra_tear_down_cpu)(void);
+void (*tegra_sleep_core_finish)(unsigned long v2p);
+static int (*tegra_sleep_func)(unsigned long v2p);
+
+static void tegra_tear_down_cpu_init(void)
+{
+ switch (tegra_get_chip_id()) {
+ case TEGRA20:
+ if (IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC))
+ tegra_tear_down_cpu = tegra20_tear_down_cpu;
+ break;
+ case TEGRA30:
+ case TEGRA114:
+ case TEGRA124:
+ if (IS_ENABLED(CONFIG_ARCH_TEGRA_3x_SOC) ||
+ IS_ENABLED(CONFIG_ARCH_TEGRA_114_SOC) ||
+ IS_ENABLED(CONFIG_ARCH_TEGRA_124_SOC))
+ tegra_tear_down_cpu = tegra30_tear_down_cpu;
+ break;
+ }
+}
+
+/*
+ * restore_cpu_complex
+ *
+ * restores cpu clock setting, clears flow controller
+ *
+ * Always called on CPU 0.
+ */
+static void restore_cpu_complex(void)
+{
+ int cpu = smp_processor_id();
+
+ BUG_ON(cpu != 0);
+
+#ifdef CONFIG_SMP
+ cpu = cpu_logical_map(cpu);
+#endif
+
+ /* Restore the CPU clock settings */
+ tegra_cpu_clock_resume();
+
+ flowctrl_cpu_suspend_exit(cpu);
+}
+
+/*
+ * suspend_cpu_complex
+ *
+ * saves pll state for use by restart_plls, prepares flow controller for
+ * transition to suspend state
+ *
+ * Must always be called on cpu 0.
+ */
+static void suspend_cpu_complex(void)
+{
+ int cpu = smp_processor_id();
+
+ BUG_ON(cpu != 0);
+
+#ifdef CONFIG_SMP
+ cpu = cpu_logical_map(cpu);
+#endif
+
+ /* Save the CPU clock settings */
+ tegra_cpu_clock_suspend();
+
+ flowctrl_cpu_suspend_enter(cpu);
+}
+
+void tegra_clear_cpu_in_lp2(void)
+{
+ int phy_cpu_id = cpu_logical_map(smp_processor_id());
+ u32 *cpu_in_lp2 = tegra_cpu_lp2_mask;
+
+ spin_lock(&tegra_lp2_lock);
+
+ BUG_ON(!(*cpu_in_lp2 & BIT(phy_cpu_id)));
+ *cpu_in_lp2 &= ~BIT(phy_cpu_id);
+
+ spin_unlock(&tegra_lp2_lock);
+}
+
+bool tegra_set_cpu_in_lp2(void)
+{
+ int phy_cpu_id = cpu_logical_map(smp_processor_id());
+ bool last_cpu = false;
+ cpumask_t *cpu_lp2_mask = tegra_cpu_lp2_mask;
+ u32 *cpu_in_lp2 = tegra_cpu_lp2_mask;
+
+ spin_lock(&tegra_lp2_lock);
+
+ BUG_ON((*cpu_in_lp2 & BIT(phy_cpu_id)));
+ *cpu_in_lp2 |= BIT(phy_cpu_id);
+
+ if ((phy_cpu_id == 0) && cpumask_equal(cpu_lp2_mask, cpu_online_mask))
+ last_cpu = true;
+ else if (tegra_get_chip_id() == TEGRA20 && phy_cpu_id == 1)
+ tegra20_cpu_set_resettable_soon();
+
+ spin_unlock(&tegra_lp2_lock);
+ return last_cpu;
+}
+
+int tegra_cpu_do_idle(void)
+{
+ return cpu_do_idle();
+}
+
+static int tegra_sleep_cpu(unsigned long v2p)
+{
+ setup_mm_for_reboot();
+ tegra_sleep_cpu_finish(v2p);
+
+ /* should never here */
+ BUG();
+
+ return 0;
+}
+
+static void tegra_pm_set(enum tegra_suspend_mode mode)
+{
+ u32 value;
+
+ switch (tegra_get_chip_id()) {
+ case TEGRA20:
+ case TEGRA30:
+ break;
+ default:
+ /* Turn off CRAIL */
+ value = flowctrl_read_cpu_csr(0);
+ value &= ~FLOW_CTRL_CSR_ENABLE_EXT_MASK;
+ value |= FLOW_CTRL_CSR_ENABLE_EXT_CRAIL;
+ flowctrl_write_cpu_csr(0, value);
+ break;
+ }
+
+ tegra_pmc_enter_suspend_mode(mode);
+}
+
+void tegra_idle_lp2_last(void)
+{
+ tegra_pm_set(TEGRA_SUSPEND_LP2);
+
+ cpu_cluster_pm_enter();
+ suspend_cpu_complex();
+
+ cpu_suspend(PHYS_OFFSET - PAGE_OFFSET, &tegra_sleep_cpu);
+
+ restore_cpu_complex();
+ cpu_cluster_pm_exit();
+}
+
+enum tegra_suspend_mode tegra_pm_validate_suspend_mode(
+ enum tegra_suspend_mode mode)
+{
+ /*
+ * The Tegra devices support suspending to LP1 or lower currently.
+ */
+ if (mode > TEGRA_SUSPEND_LP1)
+ return TEGRA_SUSPEND_LP1;
+
+ return mode;
+}
+
+static int tegra_sleep_core(unsigned long v2p)
+{
+ setup_mm_for_reboot();
+ tegra_sleep_core_finish(v2p);
+
+ /* should never here */
+ BUG();
+
+ return 0;
+}
+
+/*
+ * tegra_lp1_iram_hook
+ *
+ * Hooking the address of LP1 reset vector and SDRAM self-refresh code in
+ * SDRAM. These codes not be copied to IRAM in this fuction. We need to
+ * copy these code to IRAM before LP0/LP1 suspend and restore the content
+ * of IRAM after resume.
+ */
+static bool tegra_lp1_iram_hook(void)
+{
+ switch (tegra_get_chip_id()) {
+ case TEGRA20:
+ if (IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC))
+ tegra20_lp1_iram_hook();
+ break;
+ case TEGRA30:
+ case TEGRA114:
+ case TEGRA124:
+ if (IS_ENABLED(CONFIG_ARCH_TEGRA_3x_SOC) ||
+ IS_ENABLED(CONFIG_ARCH_TEGRA_114_SOC) ||
+ IS_ENABLED(CONFIG_ARCH_TEGRA_124_SOC))
+ tegra30_lp1_iram_hook();
+ break;
+ default:
+ break;
+ }
+
+ if (!tegra_lp1_iram.start_addr || !tegra_lp1_iram.end_addr)
+ return false;
+
+ iram_save_size = tegra_lp1_iram.end_addr - tegra_lp1_iram.start_addr;
+ iram_save_addr = kmalloc(iram_save_size, GFP_KERNEL);
+ if (!iram_save_addr)
+ return false;
+
+ return true;
+}
+
+static bool tegra_sleep_core_init(void)
+{
+ switch (tegra_get_chip_id()) {
+ case TEGRA20:
+ if (IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC))
+ tegra20_sleep_core_init();
+ break;
+ case TEGRA30:
+ case TEGRA114:
+ case TEGRA124:
+ if (IS_ENABLED(CONFIG_ARCH_TEGRA_3x_SOC) ||
+ IS_ENABLED(CONFIG_ARCH_TEGRA_114_SOC) ||
+ IS_ENABLED(CONFIG_ARCH_TEGRA_124_SOC))
+ tegra30_sleep_core_init();
+ break;
+ default:
+ break;
+ }
+
+ if (!tegra_sleep_core_finish)
+ return false;
+
+ return true;
+}
+
+static void tegra_suspend_enter_lp1(void)
+{
+ /* copy the reset vector & SDRAM shutdown code into IRAM */
+ memcpy(iram_save_addr, IO_ADDRESS(TEGRA_IRAM_LPx_RESUME_AREA),
+ iram_save_size);
+ memcpy(IO_ADDRESS(TEGRA_IRAM_LPx_RESUME_AREA),
+ tegra_lp1_iram.start_addr, iram_save_size);
+
+ *((u32 *)tegra_cpu_lp1_mask) = 1;
+}
+
+static void tegra_suspend_exit_lp1(void)
+{
+ /* restore IRAM */
+ memcpy(IO_ADDRESS(TEGRA_IRAM_LPx_RESUME_AREA), iram_save_addr,
+ iram_save_size);
+
+ *(u32 *)tegra_cpu_lp1_mask = 0;
+}
+
+static const char *lp_state[TEGRA_MAX_SUSPEND_MODE] = {
+ [TEGRA_SUSPEND_NONE] = "none",
+ [TEGRA_SUSPEND_LP2] = "LP2",
+ [TEGRA_SUSPEND_LP1] = "LP1",
+ [TEGRA_SUSPEND_LP0] = "LP0",
+};
+
+static int tegra_suspend_enter(suspend_state_t state)
+{
+ enum tegra_suspend_mode mode = tegra_pmc_get_suspend_mode();
+
+ if (WARN_ON(mode < TEGRA_SUSPEND_NONE ||
+ mode >= TEGRA_MAX_SUSPEND_MODE))
+ return -EINVAL;
+
+ pr_info("Entering suspend state %s\n", lp_state[mode]);
+
+ tegra_pm_set(mode);
+
+ local_fiq_disable();
+
+ suspend_cpu_complex();
+ switch (mode) {
+ case TEGRA_SUSPEND_LP1:
+ tegra_suspend_enter_lp1();
+ break;
+ case TEGRA_SUSPEND_LP2:
+ tegra_set_cpu_in_lp2();
+ break;
+ default:
+ break;
+ }
+
+ cpu_suspend(PHYS_OFFSET - PAGE_OFFSET, tegra_sleep_func);
+
+ switch (mode) {
+ case TEGRA_SUSPEND_LP1:
+ tegra_suspend_exit_lp1();
+ break;
+ case TEGRA_SUSPEND_LP2:
+ tegra_clear_cpu_in_lp2();
+ break;
+ default:
+ break;
+ }
+ restore_cpu_complex();
+
+ local_fiq_enable();
+
+ return 0;
+}
+
+static const struct platform_suspend_ops tegra_suspend_ops = {
+ .valid = suspend_valid_only_mem,
+ .enter = tegra_suspend_enter,
+};
+
+void __init tegra_init_suspend(void)
+{
+ enum tegra_suspend_mode mode = tegra_pmc_get_suspend_mode();
+
+ if (mode == TEGRA_SUSPEND_NONE)
+ return;
+
+ tegra_tear_down_cpu_init();
+
+ if (mode >= TEGRA_SUSPEND_LP1) {
+ if (!tegra_lp1_iram_hook() || !tegra_sleep_core_init()) {
+ pr_err("%s: unable to allocate memory for SDRAM"
+ "self-refresh -- LP0/LP1 unavailable\n",
+ __func__);
+ tegra_pmc_set_suspend_mode(TEGRA_SUSPEND_LP2);
+ mode = TEGRA_SUSPEND_LP2;
+ }
+ }
+
+ /* set up sleep function for cpu_suspend */
+ switch (mode) {
+ case TEGRA_SUSPEND_LP1:
+ tegra_sleep_func = tegra_sleep_core;
+ break;
+ case TEGRA_SUSPEND_LP2:
+ tegra_sleep_func = tegra_sleep_cpu;
+ break;
+ default:
+ break;
+ }
+
+ suspend_set_ops(&tegra_suspend_ops);
+}
+#endif