Merge tag 'msi-3.12-2' into for-3.12/soc
pci msi changes for v3.12 (round 2)
- fix build breakage for s390 allyesconfig due to !HAVE_GENERIC_HARDIRQS
diff --git a/arch/arm/mach-tegra/Kconfig b/arch/arm/mach-tegra/Kconfig
index ef3a8da..e963db2 100644
--- a/arch/arm/mach-tegra/Kconfig
+++ b/arch/arm/mach-tegra/Kconfig
@@ -2,18 +2,24 @@
bool "NVIDIA Tegra" if ARCH_MULTI_V7
select ARCH_HAS_CPUFREQ
select ARCH_REQUIRE_GPIOLIB
+ select ARM_GIC
select CLKDEV_LOOKUP
select CLKSRC_MMIO
select CLKSRC_OF
select COMMON_CLK
+ select CPU_V7
select GENERIC_CLOCKEVENTS
select HAVE_ARM_SCU if SMP
select HAVE_ARM_TWD if LOCAL_TIMERS
select HAVE_CLK
select HAVE_SMP
select MIGHT_HAVE_CACHE_L2X0
+ select PINCTRL
select SOC_BUS
select SPARSE_IRQ
+ select USB_ARCH_HAS_EHCI if USB_SUPPORT
+ select USB_ULPI if USB_PHY
+ select USB_ULPI_VIEWPORT if USB_PHY
select USE_OF
help
This enables support for NVIDIA Tegra based systems.
@@ -27,15 +33,9 @@
select ARM_ERRATA_720789
select ARM_ERRATA_754327 if SMP
select ARM_ERRATA_764369 if SMP
- select ARM_GIC
- select CPU_V7
- select PINCTRL
select PINCTRL_TEGRA20
select PL310_ERRATA_727915 if CACHE_L2X0
select PL310_ERRATA_769419 if CACHE_L2X0
- select USB_ARCH_HAS_EHCI if USB_SUPPORT
- select USB_ULPI if USB_PHY
- select USB_ULPI_VIEWPORT if USB_PHY
help
Support for NVIDIA Tegra AP20 and T20 processors, based on the
ARM CortexA9MP CPU and the ARM PL310 L2 cache controller
@@ -44,14 +44,8 @@
bool "Enable support for Tegra30 family"
select ARM_ERRATA_754322
select ARM_ERRATA_764369 if SMP
- select ARM_GIC
- select CPU_V7
- select PINCTRL
select PINCTRL_TEGRA30
select PL310_ERRATA_769419 if CACHE_L2X0
- select USB_ARCH_HAS_EHCI if USB_SUPPORT
- select USB_ULPI if USB_PHY
- select USB_ULPI_VIEWPORT if USB_PHY
help
Support for NVIDIA Tegra T30 processor family, based on the
ARM CortexA9MP CPU and the ARM PL310 L2 cache controller
@@ -59,10 +53,8 @@
config ARCH_TEGRA_114_SOC
bool "Enable support for Tegra114 family"
select HAVE_ARM_ARCH_TIMER
- select ARM_GIC
+ select ARM_ERRATA_798181
select ARM_L1_CACHE_SHIFT_6
- select CPU_V7
- select PINCTRL
select PINCTRL_TEGRA114
help
Support for NVIDIA Tegra T114 processor family, based on the
diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile
index 98b184e..f4e7063 100644
--- a/arch/arm/mach-tegra/Makefile
+++ b/arch/arm/mach-tegra/Makefile
@@ -17,11 +17,13 @@
obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += tegra20_speedo.o
obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += tegra2_emc.o
obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += sleep-tegra20.o
+obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += pm-tegra20.o
ifeq ($(CONFIG_CPU_IDLE),y)
obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += cpuidle-tegra20.o
endif
obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += tegra30_speedo.o
obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += sleep-tegra30.o
+obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += pm-tegra30.o
ifeq ($(CONFIG_CPU_IDLE),y)
obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += cpuidle-tegra30.o
endif
@@ -31,6 +33,7 @@
obj-$(CONFIG_ARCH_TEGRA_114_SOC) += tegra114_speedo.o
obj-$(CONFIG_ARCH_TEGRA_114_SOC) += sleep-tegra30.o
+obj-$(CONFIG_ARCH_TEGRA_114_SOC) += pm-tegra30.o
ifeq ($(CONFIG_CPU_IDLE),y)
obj-$(CONFIG_ARCH_TEGRA_114_SOC) += cpuidle-tegra114.o
endif
diff --git a/arch/arm/mach-tegra/common.h b/arch/arm/mach-tegra/common.h
index 32f8eb3..5900cc4 100644
--- a/arch/arm/mach-tegra/common.h
+++ b/arch/arm/mach-tegra/common.h
@@ -2,4 +2,3 @@
extern int tegra_cpu_kill(unsigned int cpu);
extern void tegra_cpu_die(unsigned int cpu);
-extern int tegra_cpu_disable(unsigned int cpu);
diff --git a/arch/arm/mach-tegra/cpuidle-tegra114.c b/arch/arm/mach-tegra/cpuidle-tegra114.c
index 1d1c602..e0b8730 100644
--- a/arch/arm/mach-tegra/cpuidle-tegra114.c
+++ b/arch/arm/mach-tegra/cpuidle-tegra114.c
@@ -17,15 +17,64 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/cpuidle.h>
+#include <linux/cpu_pm.h>
+#include <linux/clockchips.h>
#include <asm/cpuidle.h>
+#include <asm/suspend.h>
+#include <asm/smp_plat.h>
+
+#include "pm.h"
+#include "sleep.h"
+
+#ifdef CONFIG_PM_SLEEP
+#define TEGRA114_MAX_STATES 2
+#else
+#define TEGRA114_MAX_STATES 1
+#endif
+
+#ifdef CONFIG_PM_SLEEP
+static int tegra114_idle_power_down(struct cpuidle_device *dev,
+ struct cpuidle_driver *drv,
+ int index)
+{
+ local_fiq_disable();
+
+ tegra_set_cpu_in_lp2();
+ cpu_pm_enter();
+
+ clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER, &dev->cpu);
+
+ cpu_suspend(0, tegra30_sleep_cpu_secondary_finish);
+
+ clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_EXIT, &dev->cpu);
+
+ cpu_pm_exit();
+ tegra_clear_cpu_in_lp2();
+
+ local_fiq_enable();
+
+ return index;
+}
+#endif
static struct cpuidle_driver tegra_idle_driver = {
.name = "tegra_idle",
.owner = THIS_MODULE,
- .state_count = 1,
+ .state_count = TEGRA114_MAX_STATES,
.states = {
[0] = ARM_CPUIDLE_WFI_STATE_PWR(600),
+#ifdef CONFIG_PM_SLEEP
+ [1] = {
+ .enter = tegra114_idle_power_down,
+ .exit_latency = 500,
+ .target_residency = 1000,
+ .power_usage = 0,
+ .flags = CPUIDLE_FLAG_TIME_VALID,
+ .name = "powered-down",
+ .desc = "CPU power gated",
+ },
+#endif
},
};
diff --git a/arch/arm/mach-tegra/flowctrl.c b/arch/arm/mach-tegra/flowctrl.c
index b477ef3..5348543 100644
--- a/arch/arm/mach-tegra/flowctrl.c
+++ b/arch/arm/mach-tegra/flowctrl.c
@@ -86,6 +86,7 @@
reg |= TEGRA20_FLOW_CTRL_CSR_WFE_CPU0 << cpuid;
break;
case TEGRA30:
+ case TEGRA114:
/* clear wfe bitmap */
reg &= ~TEGRA30_FLOW_CTRL_CSR_WFE_BITMAP;
/* clear wfi bitmap */
@@ -123,6 +124,7 @@
reg &= ~TEGRA20_FLOW_CTRL_CSR_WFI_BITMAP;
break;
case TEGRA30:
+ case TEGRA114:
/* clear wfe bitmap */
reg &= ~TEGRA30_FLOW_CTRL_CSR_WFE_BITMAP;
/* clear wfi bitmap */
diff --git a/arch/arm/mach-tegra/flowctrl.h b/arch/arm/mach-tegra/flowctrl.h
index 7a29bae..c89aac6 100644
--- a/arch/arm/mach-tegra/flowctrl.h
+++ b/arch/arm/mach-tegra/flowctrl.h
@@ -28,9 +28,18 @@
#define FLOW_CTRL_SCLK_RESUME (1 << 27)
#define FLOW_CTRL_HALT_CPU_IRQ (1 << 10)
#define FLOW_CTRL_HALT_CPU_FIQ (1 << 8)
+#define FLOW_CTRL_HALT_LIC_IRQ (1 << 11)
+#define FLOW_CTRL_HALT_LIC_FIQ (1 << 10)
+#define FLOW_CTRL_HALT_GIC_IRQ (1 << 9)
+#define FLOW_CTRL_HALT_GIC_FIQ (1 << 8)
#define FLOW_CTRL_CPU0_CSR 0x8
#define FLOW_CTRL_CSR_INTR_FLAG (1 << 15)
#define FLOW_CTRL_CSR_EVENT_FLAG (1 << 14)
+#define FLOW_CTRL_CSR_ENABLE_EXT_CRAIL (1 << 13)
+#define FLOW_CTRL_CSR_ENABLE_EXT_NCPU (1 << 12)
+#define FLOW_CTRL_CSR_ENABLE_EXT_MASK ( \
+ FLOW_CTRL_CSR_ENABLE_EXT_NCPU | \
+ FLOW_CTRL_CSR_ENABLE_EXT_CRAIL)
#define FLOW_CTRL_CSR_ENABLE (1 << 0)
#define FLOW_CTRL_HALT_CPU1_EVENTS 0x14
#define FLOW_CTRL_CPU1_CSR 0x18
diff --git a/arch/arm/mach-tegra/headsmp.S b/arch/arm/mach-tegra/headsmp.S
index 045c16f..2072e73 100644
--- a/arch/arm/mach-tegra/headsmp.S
+++ b/arch/arm/mach-tegra/headsmp.S
@@ -6,6 +6,7 @@
.section ".text.head", "ax"
ENTRY(tegra_secondary_startup)
- bl v7_invalidate_l1
+ check_cpu_part_num 0xc09, r8, r9
+ bleq v7_invalidate_l1
b secondary_startup
ENDPROC(tegra_secondary_startup)
diff --git a/arch/arm/mach-tegra/hotplug.c b/arch/arm/mach-tegra/hotplug.c
index a52c10e..04de2e8 100644
--- a/arch/arm/mach-tegra/hotplug.c
+++ b/arch/arm/mach-tegra/hotplug.c
@@ -37,7 +37,7 @@
void __ref tegra_cpu_die(unsigned int cpu)
{
/* Clean L1 data cache */
- tegra_disable_clean_inv_dcache();
+ tegra_disable_clean_inv_dcache(TEGRA_FLUSH_CACHE_LOUIS);
/* Shut down the current CPU. */
tegra_hotplug_shutdown();
@@ -46,17 +46,6 @@
BUG();
}
-int tegra_cpu_disable(unsigned int cpu)
-{
- switch (tegra_chip_id) {
- case TEGRA20:
- case TEGRA30:
- return cpu == 0 ? -EPERM : 0;
- default:
- return 0;
- }
-}
-
void __init tegra_hotplug_init(void)
{
if (!IS_ENABLED(CONFIG_HOTPLUG_CPU))
diff --git a/arch/arm/mach-tegra/iomap.h b/arch/arm/mach-tegra/iomap.h
index 399fbca..aba3629 100644
--- a/arch/arm/mach-tegra/iomap.h
+++ b/arch/arm/mach-tegra/iomap.h
@@ -24,6 +24,8 @@
#define TEGRA_IRAM_BASE 0x40000000
#define TEGRA_IRAM_SIZE SZ_256K
+#define TEGRA_IRAM_CODE_AREA (TEGRA_IRAM_BASE + SZ_4K)
+
#define TEGRA_HOST1X_BASE 0x50000000
#define TEGRA_HOST1X_SIZE 0x24000
@@ -237,6 +239,12 @@
#define TEGRA_KFUSE_BASE 0x7000FC00
#define TEGRA_KFUSE_SIZE SZ_1K
+#define TEGRA_EMC0_BASE 0x7001A000
+#define TEGRA_EMC0_SIZE SZ_2K
+
+#define TEGRA_EMC1_BASE 0x7001A800
+#define TEGRA_EMC1_SIZE SZ_2K
+
#define TEGRA_CSITE_BASE 0x70040000
#define TEGRA_CSITE_SIZE SZ_256K
diff --git a/arch/arm/mach-tegra/irq.c b/arch/arm/mach-tegra/irq.c
index 0de4eed..1a74d56 100644
--- a/arch/arm/mach-tegra/irq.c
+++ b/arch/arm/mach-tegra/irq.c
@@ -18,10 +18,12 @@
*/
#include <linux/kernel.h>
+#include <linux/cpu_pm.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <linux/of.h>
+#include <linux/of_address.h>
#include <linux/irqchip/arm-gic.h>
#include <linux/syscore_ops.h>
@@ -65,6 +67,7 @@
static u32 cpu_iep[TEGRA_MAX_NUM_ICTLRS];
static u32 ictlr_wake_mask[TEGRA_MAX_NUM_ICTLRS];
+static void __iomem *tegra_gic_cpu_base;
#endif
bool tegra_pending_sgi(void)
@@ -213,8 +216,43 @@
return 0;
}
+
+static int tegra_gic_notifier(struct notifier_block *self,
+ unsigned long cmd, void *v)
+{
+ switch (cmd) {
+ case CPU_PM_ENTER:
+ writel_relaxed(0x1E0, tegra_gic_cpu_base + GIC_CPU_CTRL);
+ break;
+ }
+
+ return NOTIFY_OK;
+}
+
+static struct notifier_block tegra_gic_notifier_block = {
+ .notifier_call = tegra_gic_notifier,
+};
+
+static const struct of_device_id tegra114_dt_gic_match[] __initconst = {
+ { .compatible = "arm,cortex-a15-gic" },
+ { }
+};
+
+static void tegra114_gic_cpu_pm_registration(void)
+{
+ struct device_node *dn;
+
+ dn = of_find_matching_node(NULL, tegra114_dt_gic_match);
+ if (!dn)
+ return;
+
+ tegra_gic_cpu_base = of_iomap(dn, 1);
+
+ cpu_pm_register_notifier(&tegra_gic_notifier_block);
+}
#else
#define tegra_set_wake NULL
+static void tegra114_gic_cpu_pm_registration(void) { }
#endif
void __init tegra_init_irq(void)
@@ -252,4 +290,6 @@
if (!of_have_populated_dt())
gic_init(0, 29, distbase,
IO_ADDRESS(TEGRA_ARM_PERIF_BASE + 0x100));
+
+ tegra114_gic_cpu_pm_registration();
}
diff --git a/arch/arm/mach-tegra/platsmp.c b/arch/arm/mach-tegra/platsmp.c
index 24db4ac..554aedc 100644
--- a/arch/arm/mach-tegra/platsmp.c
+++ b/arch/arm/mach-tegra/platsmp.c
@@ -196,6 +196,5 @@
#ifdef CONFIG_HOTPLUG_CPU
.cpu_kill = tegra_cpu_kill,
.cpu_die = tegra_cpu_die,
- .cpu_disable = tegra_cpu_disable,
#endif
};
diff --git a/arch/arm/mach-tegra/pm-tegra20.c b/arch/arm/mach-tegra/pm-tegra20.c
new file mode 100644
index 0000000..d65e1d7
--- /dev/null
+++ b/arch/arm/mach-tegra/pm-tegra20.c
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2013, 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/kernel.h>
+
+#include "pm.h"
+
+#ifdef CONFIG_PM_SLEEP
+extern u32 tegra20_iram_start, tegra20_iram_end;
+extern void tegra20_sleep_core_finish(unsigned long);
+
+void tegra20_lp1_iram_hook(void)
+{
+ tegra_lp1_iram.start_addr = &tegra20_iram_start;
+ tegra_lp1_iram.end_addr = &tegra20_iram_end;
+}
+
+void tegra20_sleep_core_init(void)
+{
+ tegra_sleep_core_finish = tegra20_sleep_core_finish;
+}
+#endif
diff --git a/arch/arm/mach-tegra/pm-tegra30.c b/arch/arm/mach-tegra/pm-tegra30.c
new file mode 100644
index 0000000..8fa326d
--- /dev/null
+++ b/arch/arm/mach-tegra/pm-tegra30.c
@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2013, 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/kernel.h>
+
+#include "pm.h"
+
+#ifdef CONFIG_PM_SLEEP
+extern u32 tegra30_iram_start, tegra30_iram_end;
+extern void tegra30_sleep_core_finish(unsigned long);
+
+void tegra30_lp1_iram_hook(void)
+{
+ tegra_lp1_iram.start_addr = &tegra30_iram_start;
+ tegra_lp1_iram.end_addr = &tegra30_iram_end;
+}
+
+void tegra30_sleep_core_init(void)
+{
+ tegra_sleep_core_finish = tegra30_sleep_core_finish;
+}
+#endif
diff --git a/arch/arm/mach-tegra/pm.c b/arch/arm/mach-tegra/pm.c
index 94e69be..eaf6bd3 100644
--- a/arch/arm/mach-tegra/pm.c
+++ b/arch/arm/mach-tegra/pm.c
@@ -37,12 +37,18 @@
#include "reset.h"
#include "flowctrl.h"
#include "fuse.h"
+#include "pm.h"
#include "pmc.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)
{
@@ -52,7 +58,9 @@
tegra_tear_down_cpu = tegra20_tear_down_cpu;
break;
case TEGRA30:
- if (IS_ENABLED(CONFIG_ARCH_TEGRA_3x_SOC))
+ case TEGRA114:
+ if (IS_ENABLED(CONFIG_ARCH_TEGRA_3x_SOC) ||
+ IS_ENABLED(CONFIG_ARCH_TEGRA_114_SOC))
tegra_tear_down_cpu = tegra30_tear_down_cpu;
break;
}
@@ -171,19 +179,109 @@
enum tegra_suspend_mode tegra_pm_validate_suspend_mode(
enum tegra_suspend_mode mode)
{
- /* Tegra114 didn't support any suspending mode yet. */
- if (tegra_chip_id == TEGRA114)
- return TEGRA_SUSPEND_NONE;
-
/*
- * The Tegra devices only support suspending to LP2 currently.
+ * The Tegra devices support suspending to LP1 or lower currently.
*/
- if (mode > TEGRA_SUSPEND_LP2)
- return TEGRA_SUSPEND_LP2;
+ 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_chip_id) {
+ case TEGRA20:
+ if (IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC))
+ tegra20_lp1_iram_hook();
+ break;
+ case TEGRA30:
+ case TEGRA114:
+ if (IS_ENABLED(CONFIG_ARCH_TEGRA_3x_SOC) ||
+ IS_ENABLED(CONFIG_ARCH_TEGRA_114_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_chip_id) {
+ case TEGRA20:
+ if (IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC))
+ tegra20_sleep_core_init();
+ break;
+ case TEGRA30:
+ case TEGRA114:
+ if (IS_ENABLED(CONFIG_ARCH_TEGRA_3x_SOC) ||
+ IS_ENABLED(CONFIG_ARCH_TEGRA_114_SOC))
+ tegra30_sleep_core_init();
+ break;
+ default:
+ break;
+ }
+
+ if (!tegra_sleep_core_finish)
+ return false;
+
+ return true;
+}
+
+static void tegra_suspend_enter_lp1(void)
+{
+ tegra_pmc_suspend();
+
+ /* copy the reset vector & SDRAM shutdown code into IRAM */
+ memcpy(iram_save_addr, IO_ADDRESS(TEGRA_IRAM_CODE_AREA),
+ iram_save_size);
+ memcpy(IO_ADDRESS(TEGRA_IRAM_CODE_AREA), tegra_lp1_iram.start_addr,
+ iram_save_size);
+
+ *((u32 *)tegra_cpu_lp1_mask) = 1;
+}
+
+static void tegra_suspend_exit_lp1(void)
+{
+ tegra_pmc_resume();
+
+ /* restore IRAM */
+ memcpy(IO_ADDRESS(TEGRA_IRAM_CODE_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",
@@ -207,6 +305,9 @@
suspend_cpu_complex();
switch (mode) {
+ case TEGRA_SUSPEND_LP1:
+ tegra_suspend_enter_lp1();
+ break;
case TEGRA_SUSPEND_LP2:
tegra_set_cpu_in_lp2();
break;
@@ -214,9 +315,12 @@
break;
}
- cpu_suspend(PHYS_OFFSET - PAGE_OFFSET, &tegra_sleep_cpu);
+ 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;
@@ -237,12 +341,36 @@
void __init tegra_init_suspend(void)
{
- if (tegra_pmc_get_suspend_mode() == TEGRA_SUSPEND_NONE)
+ enum tegra_suspend_mode mode = tegra_pmc_get_suspend_mode();
+
+ if (mode == TEGRA_SUSPEND_NONE)
return;
tegra_tear_down_cpu_init();
tegra_pmc_suspend_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
diff --git a/arch/arm/mach-tegra/pm.h b/arch/arm/mach-tegra/pm.h
index 94c4b9d..fe204e5 100644
--- a/arch/arm/mach-tegra/pm.h
+++ b/arch/arm/mach-tegra/pm.h
@@ -23,6 +23,18 @@
#include "pmc.h"
+struct tegra_lp1_iram {
+ void *start_addr;
+ void *end_addr;
+};
+extern struct tegra_lp1_iram tegra_lp1_iram;
+extern void (*tegra_sleep_core_finish)(unsigned long v2p);
+
+void tegra20_lp1_iram_hook(void);
+void tegra20_sleep_core_init(void);
+void tegra30_lp1_iram_hook(void);
+void tegra30_sleep_core_init(void);
+
extern unsigned long l2x0_saved_regs_addr;
void save_cpu_arch_register(void);
diff --git a/arch/arm/mach-tegra/pmc.c b/arch/arm/mach-tegra/pmc.c
index eb3fa4a..8acb881 100644
--- a/arch/arm/mach-tegra/pmc.c
+++ b/arch/arm/mach-tegra/pmc.c
@@ -21,11 +21,14 @@
#include <linux/of.h>
#include <linux/of_address.h>
+#include "flowctrl.h"
#include "fuse.h"
#include "pm.h"
#include "pmc.h"
#include "sleep.h"
+#define TEGRA_POWER_SYSCLK_POLARITY (1 << 10) /* sys clk polarity */
+#define TEGRA_POWER_SYSCLK_OE (1 << 11) /* system clock enable */
#define TEGRA_POWER_EFFECT_LP0 (1 << 14) /* LP0 when CPU pwr gated */
#define TEGRA_POWER_CPU_PWRREQ_POLARITY (1 << 15) /* CPU pwr req polarity */
#define TEGRA_POWER_CPU_PWRREQ_OE (1 << 16) /* CPU pwr req enable */
@@ -193,16 +196,50 @@
return pmc_pm_data.suspend_mode;
}
+void tegra_pmc_set_suspend_mode(enum tegra_suspend_mode mode)
+{
+ if (mode < TEGRA_SUSPEND_NONE || mode >= TEGRA_MAX_SUSPEND_MODE)
+ return;
+
+ pmc_pm_data.suspend_mode = mode;
+}
+
+void tegra_pmc_suspend(void)
+{
+ tegra_pmc_writel(virt_to_phys(tegra_resume), PMC_SCRATCH41);
+}
+
+void tegra_pmc_resume(void)
+{
+ tegra_pmc_writel(0x0, PMC_SCRATCH41);
+}
+
void tegra_pmc_pm_set(enum tegra_suspend_mode mode)
{
- u32 reg;
+ u32 reg, csr_reg;
unsigned long rate = 0;
reg = tegra_pmc_readl(PMC_CTRL);
reg |= TEGRA_POWER_CPU_PWRREQ_OE;
reg &= ~TEGRA_POWER_EFFECT_LP0;
+ switch (tegra_chip_id) {
+ case TEGRA20:
+ case TEGRA30:
+ break;
+ default:
+ /* Turn off CRAIL */
+ csr_reg = flowctrl_read_cpu_csr(0);
+ csr_reg &= ~FLOW_CTRL_CSR_ENABLE_EXT_MASK;
+ csr_reg |= FLOW_CTRL_CSR_ENABLE_EXT_CRAIL;
+ flowctrl_write_cpu_csr(0, csr_reg);
+ break;
+ }
+
switch (mode) {
+ case TEGRA_SUSPEND_LP1:
+ rate = 32768;
+ break;
case TEGRA_SUSPEND_LP2:
rate = clk_get_rate(tegra_pclk);
break;
@@ -224,6 +261,20 @@
reg = tegra_pmc_readl(PMC_CTRL);
reg |= TEGRA_POWER_CPU_PWRREQ_OE;
tegra_pmc_writel(reg, PMC_CTRL);
+
+ reg = tegra_pmc_readl(PMC_CTRL);
+
+ if (!pmc_pm_data.sysclkreq_high)
+ reg |= TEGRA_POWER_SYSCLK_POLARITY;
+ else
+ reg &= ~TEGRA_POWER_SYSCLK_POLARITY;
+
+ /* configure the output polarity while the request is tristated */
+ tegra_pmc_writel(reg, PMC_CTRL);
+
+ /* now enable the request */
+ reg |= TEGRA_POWER_SYSCLK_OE;
+ tegra_pmc_writel(reg, PMC_CTRL);
}
#endif
diff --git a/arch/arm/mach-tegra/pmc.h b/arch/arm/mach-tegra/pmc.h
index e1c2df2..549f8c7 100644
--- a/arch/arm/mach-tegra/pmc.h
+++ b/arch/arm/mach-tegra/pmc.h
@@ -28,6 +28,9 @@
#ifdef CONFIG_PM_SLEEP
enum tegra_suspend_mode tegra_pmc_get_suspend_mode(void);
+void tegra_pmc_set_suspend_mode(enum tegra_suspend_mode mode);
+void tegra_pmc_suspend(void);
+void tegra_pmc_resume(void);
void tegra_pmc_pm_set(enum tegra_suspend_mode mode);
void tegra_pmc_suspend_init(void);
#endif
diff --git a/arch/arm/mach-tegra/reset-handler.S b/arch/arm/mach-tegra/reset-handler.S
index 39dc9e7..f527b2c 100644
--- a/arch/arm/mach-tegra/reset-handler.S
+++ b/arch/arm/mach-tegra/reset-handler.S
@@ -40,9 +40,12 @@
* re-enabling sdram.
*
* r6: SoC ID
+ * r8: CPU part number
*/
ENTRY(tegra_resume)
- bl v7_invalidate_l1
+ check_cpu_part_num 0xc09, r8, r9
+ bleq v7_invalidate_l1
+ blne tegra_init_l2_for_a15
cpu_id r0
tegra_get_soc_id TEGRA_APB_MISC_BASE, r6
@@ -70,7 +73,8 @@
str r1, [r2]
1:
- check_cpu_part_num 0xc09, r8, r9
+ mov32 r9, 0xc09
+ cmp r8, r9
bne not_ca9
#ifdef CONFIG_HAVE_ARM_SCU
/* enable SCU */
@@ -178,6 +182,19 @@
1:
#endif
+ /* Waking up from LP1? */
+ ldr r8, [r12, #RESET_DATA(MASK_LP1)]
+ tst r8, r11 @ if in_lp1
+ beq __is_not_lp1
+ cmp r10, #0
+ bne __die @ only CPU0 can be here
+ ldr lr, [r12, #RESET_DATA(STARTUP_LP1)]
+ cmp lr, #0
+ bleq __die @ no LP1 startup handler
+ THUMB( add lr, lr, #1 ) @ switch to Thumb mode
+ bx lr
+__is_not_lp1:
+
/* Waking up from LP2? */
ldr r9, [r12, #RESET_DATA(MASK_LP2)]
tst r9, r11 @ if in_lp2
diff --git a/arch/arm/mach-tegra/reset.c b/arch/arm/mach-tegra/reset.c
index 1ac434e..fd0bbf8 100644
--- a/arch/arm/mach-tegra/reset.c
+++ b/arch/arm/mach-tegra/reset.c
@@ -81,6 +81,8 @@
#endif
#ifdef CONFIG_PM_SLEEP
+ __tegra_cpu_reset_handler_data[TEGRA_RESET_STARTUP_LP1] =
+ TEGRA_IRAM_CODE_AREA;
__tegra_cpu_reset_handler_data[TEGRA_RESET_STARTUP_LP2] =
virt_to_phys((void *)tegra_resume);
#endif
diff --git a/arch/arm/mach-tegra/reset.h b/arch/arm/mach-tegra/reset.h
index c90d8e9..76a9343 100644
--- a/arch/arm/mach-tegra/reset.h
+++ b/arch/arm/mach-tegra/reset.h
@@ -39,6 +39,10 @@
void tegra_secondary_startup(void);
#ifdef CONFIG_PM_SLEEP
+#define tegra_cpu_lp1_mask \
+ (IO_ADDRESS(TEGRA_IRAM_BASE + TEGRA_IRAM_RESET_HANDLER_OFFSET + \
+ ((u32)&__tegra_cpu_reset_handler_data[TEGRA_RESET_MASK_LP1] - \
+ (u32)__tegra_cpu_reset_handler_start)))
#define tegra_cpu_lp2_mask \
(IO_ADDRESS(TEGRA_IRAM_BASE + TEGRA_IRAM_RESET_HANDLER_OFFSET + \
((u32)&__tegra_cpu_reset_handler_data[TEGRA_RESET_MASK_LP2] - \
diff --git a/arch/arm/mach-tegra/sleep-tegra20.S b/arch/arm/mach-tegra/sleep-tegra20.S
index e3f2417..5c3bd11 100644
--- a/arch/arm/mach-tegra/sleep-tegra20.S
+++ b/arch/arm/mach-tegra/sleep-tegra20.S
@@ -23,10 +23,49 @@
#include <asm/assembler.h>
#include <asm/proc-fns.h>
#include <asm/cp15.h>
+#include <asm/cache.h>
#include "sleep.h"
#include "flowctrl.h"
+#define EMC_CFG 0xc
+#define EMC_ADR_CFG 0x10
+#define EMC_REFRESH 0x70
+#define EMC_NOP 0xdc
+#define EMC_SELF_REF 0xe0
+#define EMC_REQ_CTRL 0x2b0
+#define EMC_EMC_STATUS 0x2b4
+
+#define CLK_RESET_CCLK_BURST 0x20
+#define CLK_RESET_CCLK_DIVIDER 0x24
+#define CLK_RESET_SCLK_BURST 0x28
+#define CLK_RESET_SCLK_DIVIDER 0x2c
+#define CLK_RESET_PLLC_BASE 0x80
+#define CLK_RESET_PLLM_BASE 0x90
+#define CLK_RESET_PLLP_BASE 0xa0
+
+#define APB_MISC_XM2CFGCPADCTRL 0x8c8
+#define APB_MISC_XM2CFGDPADCTRL 0x8cc
+#define APB_MISC_XM2CLKCFGPADCTRL 0x8d0
+#define APB_MISC_XM2COMPPADCTRL 0x8d4
+#define APB_MISC_XM2VTTGENPADCTRL 0x8d8
+#define APB_MISC_XM2CFGCPADCTRL2 0x8e4
+#define APB_MISC_XM2CFGDPADCTRL2 0x8e8
+
+.macro pll_enable, rd, r_car_base, pll_base
+ ldr \rd, [\r_car_base, #\pll_base]
+ tst \rd, #(1 << 30)
+ orreq \rd, \rd, #(1 << 30)
+ streq \rd, [\r_car_base, #\pll_base]
+.endm
+
+.macro emc_device_mask, rd, base
+ ldr \rd, [\base, #EMC_ADR_CFG]
+ tst \rd, #(0x3 << 24)
+ moveq \rd, #(0x1 << 8) @ just 1 device
+ movne \rd, #(0x3 << 8) @ 2 devices
+.endm
+
#if defined(CONFIG_HOTPLUG_CPU) || defined(CONFIG_PM_SLEEP)
/*
* tegra20_hotplug_shutdown(void)
@@ -181,6 +220,28 @@
ENDPROC(tegra20_cpu_is_resettable_soon)
/*
+ * tegra20_sleep_core_finish(unsigned long v2p)
+ *
+ * Enters suspend in LP0 or LP1 by turning off the mmu and jumping to
+ * tegra20_tear_down_core in IRAM
+ */
+ENTRY(tegra20_sleep_core_finish)
+ /* Flush, disable the L1 data cache and exit SMP */
+ bl tegra_disable_clean_inv_dcache
+
+ mov32 r3, tegra_shut_off_mmu
+ add r3, r3, r0
+
+ mov32 r0, tegra20_tear_down_core
+ mov32 r1, tegra20_iram_start
+ sub r0, r0, r1
+ mov32 r1, TEGRA_IRAM_CODE_AREA
+ add r0, r0, r1
+
+ mov pc, r3
+ENDPROC(tegra20_sleep_core_finish)
+
+/*
* tegra20_sleep_cpu_secondary_finish(unsigned long v2p)
*
* Enters WFI on secondary CPU by exiting coherency.
@@ -191,6 +252,7 @@
mrc p15, 0, r11, c1, c0, 1 @ save actlr before exiting coherency
/* Flush and disable the L1 data cache */
+ mov r0, #TEGRA_FLUSH_CACHE_LOUIS
bl tegra_disable_clean_inv_dcache
mov32 r0, TEGRA_PMC_VIRT + PMC_SCRATCH41
@@ -250,6 +312,150 @@
b tegra20_enter_sleep
ENDPROC(tegra20_tear_down_cpu)
+/* START OF ROUTINES COPIED TO IRAM */
+ .align L1_CACHE_SHIFT
+ .globl tegra20_iram_start
+tegra20_iram_start:
+
+/*
+ * tegra20_lp1_reset
+ *
+ * reset vector for LP1 restore; copied into IRAM during suspend.
+ * Brings the system back up to a safe staring point (SDRAM out of
+ * self-refresh, PLLC, PLLM and PLLP reenabled, CPU running on PLLP,
+ * system clock running on the same PLL that it suspended at), and
+ * jumps to tegra_resume to restore virtual addressing and PLLX.
+ * The physical address of tegra_resume expected to be stored in
+ * PMC_SCRATCH41.
+ *
+ * NOTE: THIS *MUST* BE RELOCATED TO TEGRA_IRAM_CODE_AREA.
+ */
+ENTRY(tegra20_lp1_reset)
+ /*
+ * The CPU and system bus are running at 32KHz and executing from
+ * IRAM when this code is executed; immediately switch to CLKM and
+ * enable PLLM, PLLP, PLLC.
+ */
+ mov32 r0, TEGRA_CLK_RESET_BASE
+
+ mov r1, #(1 << 28)
+ str r1, [r0, #CLK_RESET_SCLK_BURST]
+ str r1, [r0, #CLK_RESET_CCLK_BURST]
+ mov r1, #0
+ str r1, [r0, #CLK_RESET_CCLK_DIVIDER]
+ str r1, [r0, #CLK_RESET_SCLK_DIVIDER]
+
+ pll_enable r1, r0, CLK_RESET_PLLM_BASE
+ pll_enable r1, r0, CLK_RESET_PLLP_BASE
+ pll_enable r1, r0, CLK_RESET_PLLC_BASE
+
+ adr r2, tegra20_sdram_pad_address
+ adr r4, tegra20_sdram_pad_save
+ mov r5, #0
+
+ ldr r6, tegra20_sdram_pad_size
+padload:
+ ldr r7, [r2, r5] @ r7 is the addr in the pad_address
+
+ ldr r1, [r4, r5]
+ str r1, [r7] @ restore the value in pad_save
+
+ add r5, r5, #4
+ cmp r6, r5
+ bne padload
+
+padload_done:
+ /* 255uS delay for PLL stabilization */
+ mov32 r7, TEGRA_TMRUS_BASE
+ ldr r1, [r7]
+ add r1, r1, #0xff
+ wait_until r1, r7, r9
+
+ adr r4, tegra20_sclk_save
+ ldr r4, [r4]
+ str r4, [r0, #CLK_RESET_SCLK_BURST]
+ mov32 r4, ((1 << 28) | (4)) @ burst policy is PLLP
+ str r4, [r0, #CLK_RESET_CCLK_BURST]
+
+ mov32 r0, TEGRA_EMC_BASE
+ ldr r1, [r0, #EMC_CFG]
+ bic r1, r1, #(1 << 31) @ disable DRAM_CLK_STOP
+ str r1, [r0, #EMC_CFG]
+
+ mov r1, #0
+ str r1, [r0, #EMC_SELF_REF] @ take DRAM out of self refresh
+ mov r1, #1
+ str r1, [r0, #EMC_NOP]
+ str r1, [r0, #EMC_NOP]
+ str r1, [r0, #EMC_REFRESH]
+
+ emc_device_mask r1, r0
+
+exit_selfrefresh_loop:
+ ldr r2, [r0, #EMC_EMC_STATUS]
+ ands r2, r2, r1
+ bne exit_selfrefresh_loop
+
+ mov r1, #0 @ unstall all transactions
+ str r1, [r0, #EMC_REQ_CTRL]
+
+ mov32 r0, TEGRA_PMC_BASE
+ ldr r0, [r0, #PMC_SCRATCH41]
+ mov pc, r0 @ jump to tegra_resume
+ENDPROC(tegra20_lp1_reset)
+
+/*
+ * tegra20_tear_down_core
+ *
+ * copied into and executed from IRAM
+ * puts memory in self-refresh for LP0 and LP1
+ */
+tegra20_tear_down_core:
+ bl tegra20_sdram_self_refresh
+ bl tegra20_switch_cpu_to_clk32k
+ b tegra20_enter_sleep
+
+/*
+ * tegra20_switch_cpu_to_clk32k
+ *
+ * In LP0 and LP1 all PLLs will be turned off. Switch the CPU and system clock
+ * to the 32KHz clock.
+ */
+tegra20_switch_cpu_to_clk32k:
+ /*
+ * start by switching to CLKM to safely disable PLLs, then switch to
+ * CLKS.
+ */
+ mov r0, #(1 << 28)
+ str r0, [r5, #CLK_RESET_SCLK_BURST]
+ str r0, [r5, #CLK_RESET_CCLK_BURST]
+ mov r0, #0
+ str r0, [r5, #CLK_RESET_CCLK_DIVIDER]
+ str r0, [r5, #CLK_RESET_SCLK_DIVIDER]
+
+ /* 2uS delay delay between changing SCLK and disabling PLLs */
+ mov32 r7, TEGRA_TMRUS_BASE
+ ldr r1, [r7]
+ add r1, r1, #2
+ wait_until r1, r7, r9
+
+ /* disable PLLM, PLLP and PLLC */
+ ldr r0, [r5, #CLK_RESET_PLLM_BASE]
+ bic r0, r0, #(1 << 30)
+ str r0, [r5, #CLK_RESET_PLLM_BASE]
+ ldr r0, [r5, #CLK_RESET_PLLP_BASE]
+ bic r0, r0, #(1 << 30)
+ str r0, [r5, #CLK_RESET_PLLP_BASE]
+ ldr r0, [r5, #CLK_RESET_PLLC_BASE]
+ bic r0, r0, #(1 << 30)
+ str r0, [r5, #CLK_RESET_PLLC_BASE]
+
+ /* switch to CLKS */
+ mov r0, #0 /* brust policy = 32KHz */
+ str r0, [r5, #CLK_RESET_SCLK_BURST]
+
+ mov pc, lr
+
/*
* tegra20_enter_sleep
*
@@ -274,4 +480,95 @@
isb
b halted
+/*
+ * tegra20_sdram_self_refresh
+ *
+ * called with MMU off and caches disabled
+ * puts sdram in self refresh
+ * must be executed from IRAM
+ */
+tegra20_sdram_self_refresh:
+ mov32 r1, TEGRA_EMC_BASE @ r1 reserved for emc base addr
+
+ mov r2, #3
+ str r2, [r1, #EMC_REQ_CTRL] @ stall incoming DRAM requests
+
+emcidle:
+ ldr r2, [r1, #EMC_EMC_STATUS]
+ tst r2, #4
+ beq emcidle
+
+ mov r2, #1
+ str r2, [r1, #EMC_SELF_REF]
+
+ emc_device_mask r2, r1
+
+emcself:
+ ldr r3, [r1, #EMC_EMC_STATUS]
+ and r3, r3, r2
+ cmp r3, r2
+ bne emcself @ loop until DDR in self-refresh
+
+ adr r2, tegra20_sdram_pad_address
+ adr r3, tegra20_sdram_pad_safe
+ adr r4, tegra20_sdram_pad_save
+ mov r5, #0
+
+ ldr r6, tegra20_sdram_pad_size
+padsave:
+ ldr r0, [r2, r5] @ r0 is the addr in the pad_address
+
+ ldr r1, [r0]
+ str r1, [r4, r5] @ save the content of the addr
+
+ ldr r1, [r3, r5]
+ str r1, [r0] @ set the save val to the addr
+
+ add r5, r5, #4
+ cmp r6, r5
+ bne padsave
+padsave_done:
+
+ mov32 r5, TEGRA_CLK_RESET_BASE
+ ldr r0, [r5, #CLK_RESET_SCLK_BURST]
+ adr r2, tegra20_sclk_save
+ str r0, [r2]
+ dsb
+ mov pc, lr
+
+tegra20_sdram_pad_address:
+ .word TEGRA_APB_MISC_BASE + APB_MISC_XM2CFGCPADCTRL
+ .word TEGRA_APB_MISC_BASE + APB_MISC_XM2CFGDPADCTRL
+ .word TEGRA_APB_MISC_BASE + APB_MISC_XM2CLKCFGPADCTRL
+ .word TEGRA_APB_MISC_BASE + APB_MISC_XM2COMPPADCTRL
+ .word TEGRA_APB_MISC_BASE + APB_MISC_XM2VTTGENPADCTRL
+ .word TEGRA_APB_MISC_BASE + APB_MISC_XM2CFGCPADCTRL2
+ .word TEGRA_APB_MISC_BASE + APB_MISC_XM2CFGDPADCTRL2
+
+tegra20_sdram_pad_size:
+ .word tegra20_sdram_pad_size - tegra20_sdram_pad_address
+
+tegra20_sdram_pad_safe:
+ .word 0x8
+ .word 0x8
+ .word 0x0
+ .word 0x8
+ .word 0x5500
+ .word 0x08080040
+ .word 0x0
+
+tegra20_sclk_save:
+ .word 0x0
+
+tegra20_sdram_pad_save:
+ .rept (tegra20_sdram_pad_size - tegra20_sdram_pad_address) / 4
+ .long 0
+ .endr
+
+ .ltorg
+/* dummy symbol for end of IRAM */
+ .align L1_CACHE_SHIFT
+ .globl tegra20_iram_end
+tegra20_iram_end:
+ b .
#endif
diff --git a/arch/arm/mach-tegra/sleep-tegra30.S b/arch/arm/mach-tegra/sleep-tegra30.S
index ada8821..63fa91b 100644
--- a/arch/arm/mach-tegra/sleep-tegra30.S
+++ b/arch/arm/mach-tegra/sleep-tegra30.S
@@ -18,13 +18,118 @@
#include <asm/assembler.h>
#include <asm/asm-offsets.h>
+#include <asm/cache.h>
#include "fuse.h"
#include "sleep.h"
#include "flowctrl.h"
+#define EMC_CFG 0xc
+#define EMC_ADR_CFG 0x10
+#define EMC_TIMING_CONTROL 0x28
+#define EMC_REFRESH 0x70
+#define EMC_NOP 0xdc
+#define EMC_SELF_REF 0xe0
+#define EMC_MRW 0xe8
+#define EMC_FBIO_CFG5 0x104
+#define EMC_AUTO_CAL_CONFIG 0x2a4
+#define EMC_AUTO_CAL_INTERVAL 0x2a8
+#define EMC_AUTO_CAL_STATUS 0x2ac
+#define EMC_REQ_CTRL 0x2b0
+#define EMC_CFG_DIG_DLL 0x2bc
+#define EMC_EMC_STATUS 0x2b4
+#define EMC_ZCAL_INTERVAL 0x2e0
+#define EMC_ZQ_CAL 0x2ec
+#define EMC_XM2VTTGENPADCTRL 0x310
+#define EMC_XM2VTTGENPADCTRL2 0x314
+
+#define PMC_CTRL 0x0
+#define PMC_CTRL_SIDE_EFFECT_LP0 (1 << 14) /* enter LP0 when CPU pwr gated */
+
+#define PMC_PLLP_WB0_OVERRIDE 0xf8
+#define PMC_IO_DPD_REQ 0x1b8
+#define PMC_IO_DPD_STATUS 0x1bc
+
+#define CLK_RESET_CCLK_BURST 0x20
+#define CLK_RESET_CCLK_DIVIDER 0x24
+#define CLK_RESET_SCLK_BURST 0x28
+#define CLK_RESET_SCLK_DIVIDER 0x2c
+
+#define CLK_RESET_PLLC_BASE 0x80
+#define CLK_RESET_PLLC_MISC 0x8c
+#define CLK_RESET_PLLM_BASE 0x90
+#define CLK_RESET_PLLM_MISC 0x9c
+#define CLK_RESET_PLLP_BASE 0xa0
+#define CLK_RESET_PLLP_MISC 0xac
+#define CLK_RESET_PLLA_BASE 0xb0
+#define CLK_RESET_PLLA_MISC 0xbc
+#define CLK_RESET_PLLX_BASE 0xe0
+#define CLK_RESET_PLLX_MISC 0xe4
+#define CLK_RESET_PLLX_MISC3 0x518
+#define CLK_RESET_PLLX_MISC3_IDDQ 3
+#define CLK_RESET_PLLM_MISC_IDDQ 5
+#define CLK_RESET_PLLC_MISC_IDDQ 26
+
+#define CLK_RESET_CLK_SOURCE_MSELECT 0x3b4
+
+#define MSELECT_CLKM (0x3 << 30)
+
+#define LOCK_DELAY 50 /* safety delay after lock is detected */
+
#define TEGRA30_POWER_HOTPLUG_SHUTDOWN (1 << 27) /* Hotplug shutdown */
+.macro emc_device_mask, rd, base
+ ldr \rd, [\base, #EMC_ADR_CFG]
+ tst \rd, #0x1
+ moveq \rd, #(0x1 << 8) @ just 1 device
+ movne \rd, #(0x3 << 8) @ 2 devices
+.endm
+
+.macro emc_timing_update, rd, base
+ mov \rd, #1
+ str \rd, [\base, #EMC_TIMING_CONTROL]
+1001:
+ ldr \rd, [\base, #EMC_EMC_STATUS]
+ tst \rd, #(0x1<<23) @ wait EMC_STATUS_TIMING_UPDATE_STALLED is clear
+ bne 1001b
+.endm
+
+.macro pll_enable, rd, r_car_base, pll_base, pll_misc
+ ldr \rd, [\r_car_base, #\pll_base]
+ tst \rd, #(1 << 30)
+ orreq \rd, \rd, #(1 << 30)
+ streq \rd, [\r_car_base, #\pll_base]
+ /* Enable lock detector */
+ .if \pll_misc
+ ldr \rd, [\r_car_base, #\pll_misc]
+ bic \rd, \rd, #(1 << 18)
+ str \rd, [\r_car_base, #\pll_misc]
+ ldr \rd, [\r_car_base, #\pll_misc]
+ ldr \rd, [\r_car_base, #\pll_misc]
+ orr \rd, \rd, #(1 << 18)
+ str \rd, [\r_car_base, #\pll_misc]
+ .endif
+.endm
+
+.macro pll_locked, rd, r_car_base, pll_base
+1:
+ ldr \rd, [\r_car_base, #\pll_base]
+ tst \rd, #(1 << 27)
+ beq 1b
+.endm
+
+.macro pll_iddq_exit, rd, car, iddq, iddq_bit
+ ldr \rd, [\car, #\iddq]
+ bic \rd, \rd, #(1<<\iddq_bit)
+ str \rd, [\car, #\iddq]
+.endm
+
+.macro pll_iddq_entry, rd, car, iddq, iddq_bit
+ ldr \rd, [\car, #\iddq]
+ orr \rd, \rd, #(1<<\iddq_bit)
+ str \rd, [\car, #\iddq]
+.endm
+
#if defined(CONFIG_HOTPLUG_CPU) || defined(CONFIG_PM_SLEEP)
/*
* tegra30_hotplug_shutdown(void)
@@ -99,6 +204,8 @@
cmp r10, #TEGRA30
moveq r3, #FLOW_CTRL_WAIT_FOR_INTERRUPT @ For LP2
movne r3, #FLOW_CTRL_WAITEVENT
+ orrne r3, r3, #FLOW_CTRL_HALT_GIC_IRQ
+ orrne r3, r3, #FLOW_CTRL_HALT_GIC_FIQ
flow_ctrl_done:
cmp r10, #TEGRA30
str r3, [r2]
@@ -127,6 +234,41 @@
#ifdef CONFIG_PM_SLEEP
/*
+ * tegra30_sleep_core_finish(unsigned long v2p)
+ *
+ * Enters suspend in LP0 or LP1 by turning off the MMU and jumping to
+ * tegra30_tear_down_core in IRAM
+ */
+ENTRY(tegra30_sleep_core_finish)
+ /* Flush, disable the L1 data cache and exit SMP */
+ bl tegra_disable_clean_inv_dcache
+
+ /*
+ * Preload all the address literals that are needed for the
+ * CPU power-gating process, to avoid loading from SDRAM which
+ * are not supported once SDRAM is put into self-refresh.
+ * LP0 / LP1 use physical address, since the MMU needs to be
+ * disabled before putting SDRAM into self-refresh to avoid
+ * memory access due to page table walks.
+ */
+ mov32 r4, TEGRA_PMC_BASE
+ mov32 r5, TEGRA_CLK_RESET_BASE
+ mov32 r6, TEGRA_FLOW_CTRL_BASE
+ mov32 r7, TEGRA_TMRUS_BASE
+
+ mov32 r3, tegra_shut_off_mmu
+ add r3, r3, r0
+
+ mov32 r0, tegra30_tear_down_core
+ mov32 r1, tegra30_iram_start
+ sub r0, r0, r1
+ mov32 r1, TEGRA_IRAM_CODE_AREA
+ add r0, r0, r1
+
+ mov pc, r3
+ENDPROC(tegra30_sleep_core_finish)
+
+/*
* tegra30_sleep_cpu_secondary_finish(unsigned long v2p)
*
* Enters LP2 on secondary CPU by exiting coherency and powergating the CPU.
@@ -135,6 +277,7 @@
mov r7, lr
/* Flush and disable the L1 data cache */
+ mov r0, #TEGRA_FLUSH_CACHE_LOUIS
bl tegra_disable_clean_inv_dcache
/* Powergate this CPU. */
@@ -155,6 +298,351 @@
b tegra30_enter_sleep
ENDPROC(tegra30_tear_down_cpu)
+/* START OF ROUTINES COPIED TO IRAM */
+ .align L1_CACHE_SHIFT
+ .globl tegra30_iram_start
+tegra30_iram_start:
+
+/*
+ * tegra30_lp1_reset
+ *
+ * reset vector for LP1 restore; copied into IRAM during suspend.
+ * Brings the system back up to a safe staring point (SDRAM out of
+ * self-refresh, PLLC, PLLM and PLLP reenabled, CPU running on PLLX,
+ * system clock running on the same PLL that it suspended at), and
+ * jumps to tegra_resume to restore virtual addressing.
+ * The physical address of tegra_resume expected to be stored in
+ * PMC_SCRATCH41.
+ *
+ * NOTE: THIS *MUST* BE RELOCATED TO TEGRA_IRAM_CODE_AREA.
+ */
+ENTRY(tegra30_lp1_reset)
+ /*
+ * The CPU and system bus are running at 32KHz and executing from
+ * IRAM when this code is executed; immediately switch to CLKM and
+ * enable PLLP, PLLM, PLLC, PLLA and PLLX.
+ */
+ mov32 r0, TEGRA_CLK_RESET_BASE
+
+ mov r1, #(1 << 28)
+ str r1, [r0, #CLK_RESET_SCLK_BURST]
+ str r1, [r0, #CLK_RESET_CCLK_BURST]
+ mov r1, #0
+ str r1, [r0, #CLK_RESET_CCLK_DIVIDER]
+ str r1, [r0, #CLK_RESET_SCLK_DIVIDER]
+
+ tegra_get_soc_id TEGRA_APB_MISC_BASE, r10
+ cmp r10, #TEGRA30
+ beq _no_pll_iddq_exit
+
+ pll_iddq_exit r1, r0, CLK_RESET_PLLM_MISC, CLK_RESET_PLLM_MISC_IDDQ
+ pll_iddq_exit r1, r0, CLK_RESET_PLLC_MISC, CLK_RESET_PLLC_MISC_IDDQ
+ pll_iddq_exit r1, r0, CLK_RESET_PLLX_MISC3, CLK_RESET_PLLX_MISC3_IDDQ
+
+ mov32 r7, TEGRA_TMRUS_BASE
+ ldr r1, [r7]
+ add r1, r1, #2
+ wait_until r1, r7, r3
+
+ /* enable PLLM via PMC */
+ mov32 r2, TEGRA_PMC_BASE
+ ldr r1, [r2, #PMC_PLLP_WB0_OVERRIDE]
+ orr r1, r1, #(1 << 12)
+ str r1, [r2, #PMC_PLLP_WB0_OVERRIDE]
+
+ pll_enable r1, r0, CLK_RESET_PLLM_BASE, 0
+ pll_enable r1, r0, CLK_RESET_PLLC_BASE, 0
+ pll_enable r1, r0, CLK_RESET_PLLX_BASE, 0
+
+ b _pll_m_c_x_done
+
+_no_pll_iddq_exit:
+ /* enable PLLM via PMC */
+ mov32 r2, TEGRA_PMC_BASE
+ ldr r1, [r2, #PMC_PLLP_WB0_OVERRIDE]
+ orr r1, r1, #(1 << 12)
+ str r1, [r2, #PMC_PLLP_WB0_OVERRIDE]
+
+ pll_enable r1, r0, CLK_RESET_PLLM_BASE, CLK_RESET_PLLM_MISC
+ pll_enable r1, r0, CLK_RESET_PLLC_BASE, CLK_RESET_PLLC_MISC
+ pll_enable r1, r0, CLK_RESET_PLLX_BASE, CLK_RESET_PLLX_MISC
+
+_pll_m_c_x_done:
+ pll_enable r1, r0, CLK_RESET_PLLP_BASE, CLK_RESET_PLLP_MISC
+ pll_enable r1, r0, CLK_RESET_PLLA_BASE, CLK_RESET_PLLA_MISC
+
+ pll_locked r1, r0, CLK_RESET_PLLM_BASE
+ pll_locked r1, r0, CLK_RESET_PLLP_BASE
+ pll_locked r1, r0, CLK_RESET_PLLA_BASE
+ pll_locked r1, r0, CLK_RESET_PLLC_BASE
+ pll_locked r1, r0, CLK_RESET_PLLX_BASE
+
+ mov32 r7, TEGRA_TMRUS_BASE
+ ldr r1, [r7]
+ add r1, r1, #LOCK_DELAY
+ wait_until r1, r7, r3
+
+ adr r5, tegra30_sdram_pad_save
+
+ ldr r4, [r5, #0x18] @ restore CLK_SOURCE_MSELECT
+ str r4, [r0, #CLK_RESET_CLK_SOURCE_MSELECT]
+
+ ldr r4, [r5, #0x1C] @ restore SCLK_BURST
+ str r4, [r0, #CLK_RESET_SCLK_BURST]
+
+ cmp r10, #TEGRA30
+ movweq r4, #:lower16:((1 << 28) | (0x8)) @ burst policy is PLLX
+ movteq r4, #:upper16:((1 << 28) | (0x8))
+ movwne r4, #:lower16:((1 << 28) | (0xe))
+ movtne r4, #:upper16:((1 << 28) | (0xe))
+ str r4, [r0, #CLK_RESET_CCLK_BURST]
+
+ /* Restore pad power state to normal */
+ ldr r1, [r5, #0x14] @ PMC_IO_DPD_STATUS
+ mvn r1, r1
+ bic r1, r1, #(1 << 31)
+ orr r1, r1, #(1 << 30)
+ str r1, [r2, #PMC_IO_DPD_REQ] @ DPD_OFF
+
+ cmp r10, #TEGRA30
+ movweq r0, #:lower16:TEGRA_EMC_BASE @ r0 reserved for emc base
+ movteq r0, #:upper16:TEGRA_EMC_BASE
+ movwne r0, #:lower16:TEGRA_EMC0_BASE
+ movtne r0, #:upper16:TEGRA_EMC0_BASE
+
+exit_self_refresh:
+ ldr r1, [r5, #0xC] @ restore EMC_XM2VTTGENPADCTRL
+ str r1, [r0, #EMC_XM2VTTGENPADCTRL]
+ ldr r1, [r5, #0x10] @ restore EMC_XM2VTTGENPADCTRL2
+ str r1, [r0, #EMC_XM2VTTGENPADCTRL2]
+ ldr r1, [r5, #0x8] @ restore EMC_AUTO_CAL_INTERVAL
+ str r1, [r0, #EMC_AUTO_CAL_INTERVAL]
+
+ /* Relock DLL */
+ ldr r1, [r0, #EMC_CFG_DIG_DLL]
+ orr r1, r1, #(1 << 30) @ set DLL_RESET
+ str r1, [r0, #EMC_CFG_DIG_DLL]
+
+ emc_timing_update r1, r0
+
+ cmp r10, #TEGRA114
+ movweq r1, #:lower16:TEGRA_EMC1_BASE
+ movteq r1, #:upper16:TEGRA_EMC1_BASE
+ cmpeq r0, r1
+
+ ldr r1, [r0, #EMC_AUTO_CAL_CONFIG]
+ orr r1, r1, #(1 << 31) @ set AUTO_CAL_ACTIVE
+ orreq r1, r1, #(1 << 27) @ set slave mode for channel 1
+ str r1, [r0, #EMC_AUTO_CAL_CONFIG]
+
+emc_wait_auto_cal_onetime:
+ ldr r1, [r0, #EMC_AUTO_CAL_STATUS]
+ tst r1, #(1 << 31) @ wait until AUTO_CAL_ACTIVE is cleared
+ bne emc_wait_auto_cal_onetime
+
+ ldr r1, [r0, #EMC_CFG]
+ bic r1, r1, #(1 << 31) @ disable DRAM_CLK_STOP_PD
+ str r1, [r0, #EMC_CFG]
+
+ mov r1, #0
+ str r1, [r0, #EMC_SELF_REF] @ take DRAM out of self refresh
+ mov r1, #1
+ cmp r10, #TEGRA30
+ streq r1, [r0, #EMC_NOP]
+ streq r1, [r0, #EMC_NOP]
+ streq r1, [r0, #EMC_REFRESH]
+
+ emc_device_mask r1, r0
+
+exit_selfrefresh_loop:
+ ldr r2, [r0, #EMC_EMC_STATUS]
+ ands r2, r2, r1
+ bne exit_selfrefresh_loop
+
+ lsr r1, r1, #8 @ devSel, bit0:dev0, bit1:dev1
+
+ mov32 r7, TEGRA_TMRUS_BASE
+ ldr r2, [r0, #EMC_FBIO_CFG5]
+
+ and r2, r2, #3 @ check DRAM_TYPE
+ cmp r2, #2
+ beq emc_lpddr2
+
+ /* Issue a ZQ_CAL for dev0 - DDR3 */
+ mov32 r2, 0x80000011 @ DEV_SELECTION=2, LENGTH=LONG, CMD=1
+ str r2, [r0, #EMC_ZQ_CAL]
+ ldr r2, [r7]
+ add r2, r2, #10
+ wait_until r2, r7, r3
+
+ tst r1, #2
+ beq zcal_done
+
+ /* Issue a ZQ_CAL for dev1 - DDR3 */
+ mov32 r2, 0x40000011 @ DEV_SELECTION=1, LENGTH=LONG, CMD=1
+ str r2, [r0, #EMC_ZQ_CAL]
+ ldr r2, [r7]
+ add r2, r2, #10
+ wait_until r2, r7, r3
+ b zcal_done
+
+emc_lpddr2:
+ /* Issue a ZQ_CAL for dev0 - LPDDR2 */
+ mov32 r2, 0x800A00AB @ DEV_SELECTION=2, MA=10, OP=0xAB
+ str r2, [r0, #EMC_MRW]
+ ldr r2, [r7]
+ add r2, r2, #1
+ wait_until r2, r7, r3
+
+ tst r1, #2
+ beq zcal_done
+
+ /* Issue a ZQ_CAL for dev0 - LPDDR2 */
+ mov32 r2, 0x400A00AB @ DEV_SELECTION=1, MA=10, OP=0xAB
+ str r2, [r0, #EMC_MRW]
+ ldr r2, [r7]
+ add r2, r2, #1
+ wait_until r2, r7, r3
+
+zcal_done:
+ mov r1, #0 @ unstall all transactions
+ str r1, [r0, #EMC_REQ_CTRL]
+ ldr r1, [r5, #0x4] @ restore EMC_ZCAL_INTERVAL
+ str r1, [r0, #EMC_ZCAL_INTERVAL]
+ ldr r1, [r5, #0x0] @ restore EMC_CFG
+ str r1, [r0, #EMC_CFG]
+
+ /* Tegra114 had dual EMC channel, now config the other one */
+ cmp r10, #TEGRA114
+ bne __no_dual_emc_chanl
+ mov32 r1, TEGRA_EMC1_BASE
+ cmp r0, r1
+ movne r0, r1
+ addne r5, r5, #0x20
+ bne exit_self_refresh
+__no_dual_emc_chanl:
+
+ mov32 r0, TEGRA_PMC_BASE
+ ldr r0, [r0, #PMC_SCRATCH41]
+ mov pc, r0 @ jump to tegra_resume
+ENDPROC(tegra30_lp1_reset)
+
+ .align L1_CACHE_SHIFT
+tegra30_sdram_pad_address:
+ .word TEGRA_EMC_BASE + EMC_CFG @0x0
+ .word TEGRA_EMC_BASE + EMC_ZCAL_INTERVAL @0x4
+ .word TEGRA_EMC_BASE + EMC_AUTO_CAL_INTERVAL @0x8
+ .word TEGRA_EMC_BASE + EMC_XM2VTTGENPADCTRL @0xc
+ .word TEGRA_EMC_BASE + EMC_XM2VTTGENPADCTRL2 @0x10
+ .word TEGRA_PMC_BASE + PMC_IO_DPD_STATUS @0x14
+ .word TEGRA_CLK_RESET_BASE + CLK_RESET_CLK_SOURCE_MSELECT @0x18
+ .word TEGRA_CLK_RESET_BASE + CLK_RESET_SCLK_BURST @0x1c
+
+tegra114_sdram_pad_address:
+ .word TEGRA_EMC0_BASE + EMC_CFG @0x0
+ .word TEGRA_EMC0_BASE + EMC_ZCAL_INTERVAL @0x4
+ .word TEGRA_EMC0_BASE + EMC_AUTO_CAL_INTERVAL @0x8
+ .word TEGRA_EMC0_BASE + EMC_XM2VTTGENPADCTRL @0xc
+ .word TEGRA_EMC0_BASE + EMC_XM2VTTGENPADCTRL2 @0x10
+ .word TEGRA_PMC_BASE + PMC_IO_DPD_STATUS @0x14
+ .word TEGRA_CLK_RESET_BASE + CLK_RESET_CLK_SOURCE_MSELECT @0x18
+ .word TEGRA_CLK_RESET_BASE + CLK_RESET_SCLK_BURST @0x1c
+ .word TEGRA_EMC1_BASE + EMC_CFG @0x20
+ .word TEGRA_EMC1_BASE + EMC_ZCAL_INTERVAL @0x24
+ .word TEGRA_EMC1_BASE + EMC_AUTO_CAL_INTERVAL @0x28
+ .word TEGRA_EMC1_BASE + EMC_XM2VTTGENPADCTRL @0x2c
+ .word TEGRA_EMC1_BASE + EMC_XM2VTTGENPADCTRL2 @0x30
+
+tegra30_sdram_pad_size:
+ .word tegra114_sdram_pad_address - tegra30_sdram_pad_address
+
+tegra114_sdram_pad_size:
+ .word tegra30_sdram_pad_size - tegra114_sdram_pad_address
+
+ .type tegra30_sdram_pad_save, %object
+tegra30_sdram_pad_save:
+ .rept (tegra30_sdram_pad_size - tegra114_sdram_pad_address) / 4
+ .long 0
+ .endr
+
+/*
+ * tegra30_tear_down_core
+ *
+ * copied into and executed from IRAM
+ * puts memory in self-refresh for LP0 and LP1
+ */
+tegra30_tear_down_core:
+ bl tegra30_sdram_self_refresh
+ bl tegra30_switch_cpu_to_clk32k
+ b tegra30_enter_sleep
+
+/*
+ * tegra30_switch_cpu_to_clk32k
+ *
+ * In LP0 and LP1 all PLLs will be turned off. Switching the CPU and System CLK
+ * to the 32KHz clock.
+ * r4 = TEGRA_PMC_BASE
+ * r5 = TEGRA_CLK_RESET_BASE
+ * r6 = TEGRA_FLOW_CTRL_BASE
+ * r7 = TEGRA_TMRUS_BASE
+ * r10= SoC ID
+ */
+tegra30_switch_cpu_to_clk32k:
+ /*
+ * start by jumping to CLKM to safely disable PLLs, then jump to
+ * CLKS.
+ */
+ mov r0, #(1 << 28)
+ str r0, [r5, #CLK_RESET_SCLK_BURST]
+ /* 2uS delay delay between changing SCLK and CCLK */
+ ldr r1, [r7]
+ add r1, r1, #2
+ wait_until r1, r7, r9
+ str r0, [r5, #CLK_RESET_CCLK_BURST]
+ mov r0, #0
+ str r0, [r5, #CLK_RESET_CCLK_DIVIDER]
+ str r0, [r5, #CLK_RESET_SCLK_DIVIDER]
+
+ /* switch the clock source of mselect to be CLK_M */
+ ldr r0, [r5, #CLK_RESET_CLK_SOURCE_MSELECT]
+ orr r0, r0, #MSELECT_CLKM
+ str r0, [r5, #CLK_RESET_CLK_SOURCE_MSELECT]
+
+ /* 2uS delay delay between changing SCLK and disabling PLLs */
+ ldr r1, [r7]
+ add r1, r1, #2
+ wait_until r1, r7, r9
+
+ /* disable PLLM via PMC in LP1 */
+ ldr r0, [r4, #PMC_PLLP_WB0_OVERRIDE]
+ bic r0, r0, #(1 << 12)
+ str r0, [r4, #PMC_PLLP_WB0_OVERRIDE]
+
+ /* disable PLLP, PLLA, PLLC and PLLX */
+ ldr r0, [r5, #CLK_RESET_PLLP_BASE]
+ bic r0, r0, #(1 << 30)
+ str r0, [r5, #CLK_RESET_PLLP_BASE]
+ ldr r0, [r5, #CLK_RESET_PLLA_BASE]
+ bic r0, r0, #(1 << 30)
+ str r0, [r5, #CLK_RESET_PLLA_BASE]
+ ldr r0, [r5, #CLK_RESET_PLLC_BASE]
+ bic r0, r0, #(1 << 30)
+ str r0, [r5, #CLK_RESET_PLLC_BASE]
+ ldr r0, [r5, #CLK_RESET_PLLX_BASE]
+ bic r0, r0, #(1 << 30)
+ str r0, [r5, #CLK_RESET_PLLX_BASE]
+
+ cmp r10, #TEGRA30
+ beq _no_pll_in_iddq
+ pll_iddq_entry r1, r5, CLK_RESET_PLLX_MISC3, CLK_RESET_PLLX_MISC3_IDDQ
+_no_pll_in_iddq:
+
+ /* switch to CLKS */
+ mov r0, #0 /* brust policy = 32KHz */
+ str r0, [r5, #CLK_RESET_SCLK_BURST]
+
+ mov pc, lr
+
/*
* tegra30_enter_sleep
*
@@ -172,8 +660,12 @@
orr r0, r0, #FLOW_CTRL_CSR_ENABLE
str r0, [r6, r2]
+ tegra_get_soc_id TEGRA_APB_MISC_BASE, r10
+ cmp r10, #TEGRA30
mov r0, #FLOW_CTRL_WAIT_FOR_INTERRUPT
- orr r0, r0, #FLOW_CTRL_HALT_CPU_IRQ | FLOW_CTRL_HALT_CPU_FIQ
+ orreq r0, r0, #FLOW_CTRL_HALT_CPU_IRQ | FLOW_CTRL_HALT_CPU_FIQ
+ orrne r0, r0, #FLOW_CTRL_HALT_LIC_IRQ | FLOW_CTRL_HALT_LIC_FIQ
+
cpu_to_halt_reg r2, r1
str r0, [r6, r2]
dsb
@@ -187,4 +679,126 @@
/* !!!FIXME!!! Implement halt failure handler */
b halted
+/*
+ * tegra30_sdram_self_refresh
+ *
+ * called with MMU off and caches disabled
+ * must be executed from IRAM
+ * r4 = TEGRA_PMC_BASE
+ * r5 = TEGRA_CLK_RESET_BASE
+ * r6 = TEGRA_FLOW_CTRL_BASE
+ * r7 = TEGRA_TMRUS_BASE
+ * r10= SoC ID
+ */
+tegra30_sdram_self_refresh:
+
+ adr r8, tegra30_sdram_pad_save
+ tegra_get_soc_id TEGRA_APB_MISC_BASE, r10
+ cmp r10, #TEGRA30
+ adreq r2, tegra30_sdram_pad_address
+ ldreq r3, tegra30_sdram_pad_size
+ adrne r2, tegra114_sdram_pad_address
+ ldrne r3, tegra114_sdram_pad_size
+ mov r9, #0
+
+padsave:
+ ldr r0, [r2, r9] @ r0 is the addr in the pad_address
+
+ ldr r1, [r0]
+ str r1, [r8, r9] @ save the content of the addr
+
+ add r9, r9, #4
+ cmp r3, r9
+ bne padsave
+padsave_done:
+
+ dsb
+
+ cmp r10, #TEGRA30
+ ldreq r0, =TEGRA_EMC_BASE @ r0 reserved for emc base addr
+ ldrne r0, =TEGRA_EMC0_BASE
+
+enter_self_refresh:
+ cmp r10, #TEGRA30
+ mov r1, #0
+ str r1, [r0, #EMC_ZCAL_INTERVAL]
+ str r1, [r0, #EMC_AUTO_CAL_INTERVAL]
+ ldr r1, [r0, #EMC_CFG]
+ bic r1, r1, #(1 << 28)
+ bicne r1, r1, #(1 << 29)
+ str r1, [r0, #EMC_CFG] @ disable DYN_SELF_REF
+
+ emc_timing_update r1, r0
+
+ ldr r1, [r7]
+ add r1, r1, #5
+ wait_until r1, r7, r2
+
+emc_wait_auto_cal:
+ ldr r1, [r0, #EMC_AUTO_CAL_STATUS]
+ tst r1, #(1 << 31) @ wait until AUTO_CAL_ACTIVE is cleared
+ bne emc_wait_auto_cal
+
+ mov r1, #3
+ str r1, [r0, #EMC_REQ_CTRL] @ stall incoming DRAM requests
+
+emcidle:
+ ldr r1, [r0, #EMC_EMC_STATUS]
+ tst r1, #4
+ beq emcidle
+
+ mov r1, #1
+ str r1, [r0, #EMC_SELF_REF]
+
+ emc_device_mask r1, r0
+
+emcself:
+ ldr r2, [r0, #EMC_EMC_STATUS]
+ and r2, r2, r1
+ cmp r2, r1
+ bne emcself @ loop until DDR in self-refresh
+
+ /* Put VTTGEN in the lowest power mode */
+ ldr r1, [r0, #EMC_XM2VTTGENPADCTRL]
+ mov32 r2, 0xF8F8FFFF @ clear XM2VTTGEN_DRVUP and XM2VTTGEN_DRVDN
+ and r1, r1, r2
+ str r1, [r0, #EMC_XM2VTTGENPADCTRL]
+ ldr r1, [r0, #EMC_XM2VTTGENPADCTRL2]
+ cmp r10, #TEGRA30
+ orreq r1, r1, #7 @ set E_NO_VTTGEN
+ orrne r1, r1, #0x3f
+ str r1, [r0, #EMC_XM2VTTGENPADCTRL2]
+
+ emc_timing_update r1, r0
+
+ /* Tegra114 had dual EMC channel, now config the other one */
+ cmp r10, #TEGRA114
+ bne no_dual_emc_chanl
+ mov32 r1, TEGRA_EMC1_BASE
+ cmp r0, r1
+ movne r0, r1
+ bne enter_self_refresh
+no_dual_emc_chanl:
+
+ ldr r1, [r4, #PMC_CTRL]
+ tst r1, #PMC_CTRL_SIDE_EFFECT_LP0
+ bne pmc_io_dpd_skip
+ /*
+ * Put DDR_DATA, DISC_ADDR_CMD, DDR_ADDR_CMD, POP_ADDR_CMD, POP_CLK
+ * and COMP in the lowest power mode when LP1.
+ */
+ mov32 r1, 0x8EC00000
+ str r1, [r4, #PMC_IO_DPD_REQ]
+pmc_io_dpd_skip:
+
+ dsb
+
+ mov pc, lr
+
+ .ltorg
+/* dummy symbol for end of IRAM */
+ .align L1_CACHE_SHIFT
+ .global tegra30_iram_end
+tegra30_iram_end:
+ b .
#endif
diff --git a/arch/arm/mach-tegra/sleep.S b/arch/arm/mach-tegra/sleep.S
index 9daaef2..8d06213 100644
--- a/arch/arm/mach-tegra/sleep.S
+++ b/arch/arm/mach-tegra/sleep.S
@@ -56,7 +56,9 @@
isb
/* Flush the D-cache */
- bl v7_flush_dcache_louis
+ cmp r0, #TEGRA_FLUSH_CACHE_ALL
+ blne v7_flush_dcache_louis
+ bleq v7_flush_dcache_all
/* Trun off coherency */
exit_smp r4, r5
@@ -67,15 +69,40 @@
#ifdef CONFIG_PM_SLEEP
/*
+ * tegra_init_l2_for_a15
+ *
+ * set up the correct L2 cache data RAM latency
+ */
+ENTRY(tegra_init_l2_for_a15)
+ mrc p15, 0, r0, c0, c0, 5
+ ubfx r0, r0, #8, #4
+ tst r0, #1 @ only need for cluster 0
+ bne _exit_init_l2_a15
+
+ mrc p15, 0x1, r0, c9, c0, 2
+ and r0, r0, #7
+ cmp r0, #2
+ bicne r0, r0, #7
+ orrne r0, r0, #2
+ mcrne p15, 0x1, r0, c9, c0, 2
+_exit_init_l2_a15:
+
+ mov pc, lr
+ENDPROC(tegra_init_l2_for_a15)
+
+/*
* tegra_sleep_cpu_finish(unsigned long v2p)
*
* enters suspend in LP2 by turning off the mmu and jumping to
* tegra?_tear_down_cpu
*/
ENTRY(tegra_sleep_cpu_finish)
+ mov r4, r0
/* Flush and disable the L1 data cache */
+ mov r0, #TEGRA_FLUSH_CACHE_ALL
bl tegra_disable_clean_inv_dcache
+ mov r0, r4
mov32 r6, tegra_tear_down_cpu
ldr r1, [r6]
add r1, r1, r0
@@ -107,10 +134,10 @@
#ifdef CONFIG_CACHE_L2X0
/* Disable L2 cache */
check_cpu_part_num 0xc09, r9, r10
- movweq r4, #:lower16:(TEGRA_ARM_PERIF_BASE + 0x3000)
- movteq r4, #:upper16:(TEGRA_ARM_PERIF_BASE + 0x3000)
- moveq r5, #0
- streq r5, [r4, #L2X0_CTRL]
+ movweq r2, #:lower16:(TEGRA_ARM_PERIF_BASE + 0x3000)
+ movteq r2, #:upper16:(TEGRA_ARM_PERIF_BASE + 0x3000)
+ moveq r3, #0
+ streq r3, [r2, #L2X0_CTRL]
#endif
mov pc, r0
ENDPROC(tegra_shut_off_mmu)
diff --git a/arch/arm/mach-tegra/sleep.h b/arch/arm/mach-tegra/sleep.h
index 98b7da6..a4edbb3 100644
--- a/arch/arm/mach-tegra/sleep.h
+++ b/arch/arm/mach-tegra/sleep.h
@@ -41,7 +41,19 @@
#define CPU_NOT_RESETTABLE 0
#endif
+/* flag of tegra_disable_clean_inv_dcache to do LoUIS or all */
+#define TEGRA_FLUSH_CACHE_LOUIS 0
+#define TEGRA_FLUSH_CACHE_ALL 1
+
#ifdef __ASSEMBLY__
+/* waits until the microsecond counter (base) is > rn */
+.macro wait_until, rn, base, tmp
+ add \rn, \rn, #1
+1001: ldr \tmp, [\base]
+ cmp \tmp, \rn
+ bmi 1001b
+.endm
+
/* returns the offset of the flow controller halt register for a cpu */
.macro cpu_to_halt_reg rd, rcpu
cmp \rcpu, #0
@@ -144,7 +156,7 @@
void tegra_pen_unlock(void);
void tegra_resume(void);
int tegra_sleep_cpu_finish(unsigned long);
-void tegra_disable_clean_inv_dcache(void);
+void tegra_disable_clean_inv_dcache(u32 flag);
#ifdef CONFIG_HOTPLUG_CPU
void tegra20_hotplug_shutdown(void);
diff --git a/drivers/clk/tegra/clk-tegra114.c b/drivers/clk/tegra/clk-tegra114.c
index b6015cb..806d803 100644
--- a/drivers/clk/tegra/clk-tegra114.c
+++ b/drivers/clk/tegra/clk-tegra114.c
@@ -290,6 +290,14 @@
/* Tegra CPU clock and reset control regs */
#define CLK_RST_CONTROLLER_CPU_CMPLX_STATUS 0x470
+#ifdef CONFIG_PM_SLEEP
+static struct cpu_clk_suspend_context {
+ u32 clk_csite_src;
+ u32 cclkg_burst;
+ u32 cclkg_divider;
+} tegra114_cpu_clk_sctx;
+#endif
+
static int periph_clk_enb_refcnt[CLK_OUT_ENB_NUM * 32];
static void __iomem *clk_base;
@@ -2142,9 +2150,39 @@
/* flow controller would take care in the power sequence. */
}
+#ifdef CONFIG_PM_SLEEP
+static void tegra114_cpu_clock_suspend(void)
+{
+ /* switch coresite to clk_m, save off original source */
+ tegra114_cpu_clk_sctx.clk_csite_src =
+ readl(clk_base + CLK_SOURCE_CSITE);
+ writel(3 << 30, clk_base + CLK_SOURCE_CSITE);
+
+ tegra114_cpu_clk_sctx.cclkg_burst =
+ readl(clk_base + CCLKG_BURST_POLICY);
+ tegra114_cpu_clk_sctx.cclkg_divider =
+ readl(clk_base + CCLKG_BURST_POLICY + 4);
+}
+
+static void tegra114_cpu_clock_resume(void)
+{
+ writel(tegra114_cpu_clk_sctx.clk_csite_src,
+ clk_base + CLK_SOURCE_CSITE);
+
+ writel(tegra114_cpu_clk_sctx.cclkg_burst,
+ clk_base + CCLKG_BURST_POLICY);
+ writel(tegra114_cpu_clk_sctx.cclkg_divider,
+ clk_base + CCLKG_BURST_POLICY + 4);
+}
+#endif
+
static struct tegra_cpu_car_ops tegra114_cpu_car_ops = {
.wait_for_reset = tegra114_wait_cpu_in_reset,
.disable_clock = tegra114_disable_cpu_clock,
+#ifdef CONFIG_PM_SLEEP
+ .suspend = tegra114_cpu_clock_suspend,
+ .resume = tegra114_cpu_clock_resume,
+#endif
};
static const struct of_device_id pmc_match[] __initconst = {