msm: copper: Low Power Resource manager driver
Code changes to add support for Low Power Resource Manager Driver.
This code will manage PXO, VDD dig and Vdd mem based on the idle
mode the kernel chooses and updates the RPM sleep vote accordingly.
Change-Id: If3af14920e17c010c8e77b550ab57d532b32e6cd
Signed-off-by: Girish Mahadevan <girishm@codeaurora.org>
diff --git a/Documentation/devicetree/bindings/arm/msm/lpm-resources.txt b/Documentation/devicetree/bindings/arm/msm/lpm-resources.txt
new file mode 100644
index 0000000..9ff43a1
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/msm/lpm-resources.txt
@@ -0,0 +1,31 @@
+* Low Power Management Resources
+
+The application processor in the MSM can enter several different low power
+states depending on the sleep time and on the required system resources. The
+MSM cannot enter a given low power state if that state involves turning off
+some shared resources which are required by some components of the
+system.The lpm-resources device tree node represents the shared resources
+that need to be monitored for usage requirement to check if a given low power
+state can be entered.Each resource is identified by a combination of the name,
+id,type and key which is also used by the RPM to identify a shared resource.
+
+The required nodes for lpm-resources are:
+
+- compatible: "qcom,lpm-resources"
+- reg: The numeric level id
+- qcom,name: The name of the low power resource.
+- qcom,type: The string represeting the type of resource used
+ like smps or pxo.
+- qcom,id: The id representing a device within a resource type.
+- qcom,key: The key is the specific attribute of the resource being
+ monitored.
+
+Example:
+ qcom,lpm-resources@0 {
+ reg = <0x0>;
+ qcom,name = "vdd-dig";
+ qcom,type = "smpb\0";
+ qcom,id = <0x02>;
+ qcom,key = "uv\0\0";
+ };
+
diff --git a/arch/arm/boot/dts/msmcopper_pm.dtsi b/arch/arm/boot/dts/msmcopper_pm.dtsi
index 79cb95c..6f12e31c 100644
--- a/arch/arm/boot/dts/msmcopper_pm.dtsi
+++ b/arch/arm/boot/dts/msmcopper_pm.dtsi
@@ -132,6 +132,36 @@
3b 60 02 32 a0 50 0f];
};
+ qcom,lpm-resources {
+ compatible = "qcom,lpm-resources";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ qcom,lpm-resources@0 {
+ reg = <0x0>;
+ qcom,name = "vdd-dig";
+ qcom,type = "smpb\0";
+ qcom,id = <0x02>;
+ qcom,key = "uv\0\0";
+ };
+
+ qcom,lpm-resources@1 {
+ reg = <0x1>;
+ qcom,name = "vdd-mem";
+ qcom,type = "smpb\0";
+ qcom,id = <0x01>;
+ qcom,key = "uv\0\0";
+ };
+
+ qcom,lpm-resources@2 {
+ reg = <0x2>;
+ qcom,name = "pxo";
+ qcom,type = "clk0\0";
+ qcom,id = <0x00>;
+ qcom,key = "Enab";
+ };
+ };
+
qcom,lpm-levels {
compatible = "qcom,lpm-levels";
#address-cells = <1>;
diff --git a/arch/arm/mach-msm/Makefile b/arch/arm/mach-msm/Makefile
index c3b13ec..8315d70 100644
--- a/arch/arm/mach-msm/Makefile
+++ b/arch/arm/mach-msm/Makefile
@@ -317,7 +317,7 @@
obj-$(CONFIG_ARCH_MSM9615) += rpm_resources.o
endif
ifdef CONFIG_MSM_RPM_SMD
- obj-$(CONFIG_ARCH_MSMCOPPER) += lpm_levels.o
+ obj-$(CONFIG_ARCH_MSMCOPPER) += lpm_levels.o lpm_resources.o
endif
obj-$(CONFIG_MSM_MPM) += mpm.o
obj-$(CONFIG_MSM_RPM_STATS_LOG) += rpm_stats.o
diff --git a/arch/arm/mach-msm/board-copper.c b/arch/arm/mach-msm/board-copper.c
index 94a73c6..85241a4 100644
--- a/arch/arm/mach-msm/board-copper.c
+++ b/arch/arm/mach-msm/board-copper.c
@@ -47,6 +47,7 @@
#include "devices.h"
#include "spm.h"
#include "modem_notifier.h"
+#include "lpm_resources.h"
#define MSM_KERNEL_EBI1_MEM_SIZE 0x280000
#ifdef CONFIG_FB_MSM_HDMI_AS_PRIMARY
@@ -467,6 +468,7 @@
msm_init_modem_notifier_list();
msm_smd_init();
msm_rpm_driver_init();
+ msm_lpmrs_module_init();
rpm_regulator_smd_driver_init();
msm_spm_device_init();
regulator_stub_init();
diff --git a/arch/arm/mach-msm/lpm_levels.c b/arch/arm/mach-msm/lpm_levels.c
index a1f5ff5..e65f71c 100644
--- a/arch/arm/mach-msm/lpm_levels.c
+++ b/arch/arm/mach-msm/lpm_levels.c
@@ -18,17 +18,32 @@
#include <linux/platform_device.h>
#include <linux/of.h>
#include <mach/mpm.h>
-#include "rpm_resources.h"
+#include "lpm_resources.h"
#include "pm.h"
static struct msm_rpmrs_level *msm_lpm_levels;
static int msm_lpm_level_count;
-static int msm_lpm_enter_sleep(uint32_t sclk_count, void *limits,
+static void msm_lpm_level_update(void)
+{
+ unsigned int lpm_level;
+ struct msm_rpmrs_level *level = NULL;
+
+ for (lpm_level = 0; lpm_level < msm_lpm_level_count; lpm_level++) {
+ level = &msm_lpm_levels[lpm_level];
+ level->available =
+ !msm_lpm_level_beyond_limit(&level->rs_limits);
+ }
+}
+
+int msm_lpm_enter_sleep(uint32_t sclk_count, void *limits,
bool from_idle, bool notify_rpm)
{
- /* TODO */
- return 0;
+ int ret = 0;
+
+ ret = msm_lpmrs_enter_sleep((struct msm_rpmrs_limits *)limits,
+ from_idle, notify_rpm);
+ return ret;
}
static void msm_lpm_exit_sleep(void *limits, bool from_idle,
@@ -38,14 +53,7 @@
return;
}
-static bool msm_rpmrs_irqs_detectable(struct msm_rpmrs_limits *limits,
- bool irqs_detect, bool gpio_detect)
-{
- /* TODO */
- return true;
-}
-
-void msm_rpmrs_show_resources(void)
+void msm_lpm_show_resources(void)
{
/* TODO */
return;
@@ -80,18 +88,13 @@
{
unsigned int cpu = smp_processor_id();
struct msm_rpmrs_level *best_level = NULL;
- bool irqs_detectable = false;
- bool gpio_detectable = false;
uint32_t pwr;
int i;
if (!msm_lpm_levels)
return NULL;
- if (sleep_mode == MSM_PM_SLEEP_MODE_POWER_COLLAPSE) {
- irqs_detectable = msm_mpm_irqs_detectable(from_idle);
- gpio_detectable = msm_mpm_gpio_irqs_detectable(from_idle);
- }
+ msm_lpm_level_update();
for (i = 0; i < msm_lpm_level_count; i++) {
struct msm_rpmrs_level *level = &msm_lpm_levels[i];
@@ -105,10 +108,6 @@
if (latency_us < level->latency_us)
continue;
- if (!msm_rpmrs_irqs_detectable(&level->rs_limits,
- irqs_detectable, gpio_detectable))
- continue;
-
if (sleep_us <= 1) {
pwr = level->energy_overhead;
} else if (sleep_us <= level->time_overhead_us) {
@@ -192,7 +191,7 @@
ret = of_property_read_u32(node, key, &val);
if (ret)
goto fail;
- level->rs_limits.vdd_dig = val;
+ level->rs_limits.vdd_dig_lower_bound = val;
key = "qcom,vdd-mem-upper-bound";
ret = of_property_read_u32(node, key, &val);
@@ -204,7 +203,7 @@
ret = of_property_read_u32(node, key, &val);
if (ret)
goto fail;
- level->rs_limits.vdd_mem = val;
+ level->rs_limits.vdd_mem_lower_bound = val;
key = "qcom,latency-us";
ret = of_property_read_u32(node, key, &val);
diff --git a/arch/arm/mach-msm/lpm_resources.c b/arch/arm/mach-msm/lpm_resources.c
new file mode 100644
index 0000000..f57f974
--- /dev/null
+++ b/arch/arm/mach-msm/lpm_resources.c
@@ -0,0 +1,865 @@
+/* Copyright (c) 2012, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/cpu.h>
+#include <mach/mpm.h>
+#include <linux/notifier.h>
+#include <linux/hrtimer.h>
+#include <linux/tick.h>
+#include "spm.h"
+#include "lpm_resources.h"
+#include "rpm-notifier.h"
+#include <mach/rpm-smd.h>
+#include "idle.h"
+
+/*Debug Definitions*/
+enum {
+ MSM_LPMRS_DEBUG_RPM = BIT(0),
+ MSM_LPMRS_DEBUG_PXO = BIT(1),
+ MSM_LPMRS_DEBUG_VDD_DIG = BIT(2),
+ MSM_LPMRS_DEBUG_VDD_MEM = BIT(3),
+ MSM_LPMRS_DEBUG_L2 = BIT(4),
+ MSM_LPMRS_DEBUG_LVLS = BIT(5),
+};
+
+static int msm_lpm_debug_mask;
+module_param_named(
+ debug_mask, msm_lpm_debug_mask, int, S_IRUGO | S_IWUSR | S_IWGRP
+);
+
+static bool msm_lpm_get_rpm_notif = true;
+
+/*Macros*/
+#define VDD_DIG_ACTIVE (950000)
+#define VDD_MEM_ACTIVE (1050000)
+#define MAX_RS_NAME (16)
+#define MAX_RS_SIZE (4)
+#define IS_RPM_CTL(rs) \
+ (!strncmp(rs->name, "rpm_ctl", MAX_RS_NAME))
+
+static bool msm_lpm_beyond_limits_vdd_dig(struct msm_rpmrs_limits *limits);
+static void msm_lpm_aggregate_vdd_dig(struct msm_rpmrs_limits *limits);
+static void msm_lpm_flush_vdd_dig(int notify_rpm);
+static void msm_lpm_notify_vdd_dig(struct msm_rpm_notifier_data
+ *rpm_notifier_cb);
+
+static bool msm_lpm_beyond_limits_vdd_mem(struct msm_rpmrs_limits *limits);
+static void msm_lpm_aggregate_vdd_mem(struct msm_rpmrs_limits *limits);
+static void msm_lpm_flush_vdd_mem(int notify_rpm);
+static void msm_lpm_notify_vdd_mem(struct msm_rpm_notifier_data
+ *rpm_notifier_cb);
+
+static bool msm_lpm_beyond_limits_pxo(struct msm_rpmrs_limits *limits);
+static void msm_lpm_aggregate_pxo(struct msm_rpmrs_limits *limits);
+static void msm_lpm_flush_pxo(int notify_rpm);
+static void msm_lpm_notify_pxo(struct msm_rpm_notifier_data
+ *rpm_notifier_cb);
+
+
+static bool msm_lpm_beyond_limits_l2(struct msm_rpmrs_limits *limits);
+static void msm_lpm_flush_l2(int notify_rpm);
+static void msm_lpm_aggregate_l2(struct msm_rpmrs_limits *limits);
+
+static void msm_lpm_flush_rpm_ctl(int notify_rpm);
+
+static int msm_lpm_rpm_callback(struct notifier_block *rpm_nb,
+ unsigned long action, void *rpm_notif);
+
+static int msm_lpm_cpu_callback(struct notifier_block *cpu_nb,
+ unsigned long action, void *hcpu);
+
+static ssize_t msm_lpm_resource_attr_show(
+ struct kobject *kobj, struct kobj_attribute *attr, char *buf);
+static ssize_t msm_lpm_resource_attr_store(struct kobject *kobj,
+ struct kobj_attribute *attr, const char *buf, size_t count);
+
+
+#define RPMRS_ATTR(_name) \
+ __ATTR(_name, S_IRUGO|S_IWUSR, \
+ msm_lpm_resource_attr_show, msm_lpm_resource_attr_store)
+
+/*Data structures*/
+struct msm_lpm_rs_data {
+ uint32_t type;
+ uint32_t id;
+ uint32_t key;
+ uint32_t value;
+ uint32_t default_value;
+ struct msm_rpm_request *handle;
+};
+
+struct msm_lpm_resource {
+ struct msm_lpm_rs_data rs_data;
+ uint32_t sleep_value;
+ char name[MAX_RS_NAME];
+
+ uint32_t enable_low_power;
+ bool valid;
+
+ bool (*beyond_limits)(struct msm_rpmrs_limits *limits);
+ void (*aggregate)(struct msm_rpmrs_limits *limits);
+ void (*flush)(int notify_rpm);
+ void (*notify)(struct msm_rpm_notifier_data *rpm_notifier_cb);
+ struct kobj_attribute ko_attr;
+};
+
+
+static struct msm_lpm_resource msm_lpm_l2 = {
+ .name = "l2",
+ .beyond_limits = msm_lpm_beyond_limits_l2,
+ .aggregate = msm_lpm_aggregate_l2,
+ .flush = msm_lpm_flush_l2,
+ .notify = NULL,
+ .valid = true,
+ .rs_data = {
+ .value = MSM_LPM_L2_CACHE_ACTIVE,
+ .default_value = MSM_LPM_L2_CACHE_ACTIVE,
+ },
+ .ko_attr = RPMRS_ATTR(l2),
+};
+
+static struct msm_lpm_resource msm_lpm_vdd_dig = {
+ .name = "vdd-dig",
+ .beyond_limits = msm_lpm_beyond_limits_vdd_dig,
+ .aggregate = msm_lpm_aggregate_vdd_dig,
+ .flush = msm_lpm_flush_vdd_dig,
+ .notify = msm_lpm_notify_vdd_dig,
+ .valid = false,
+ .rs_data = {
+ .value = VDD_DIG_ACTIVE,
+ .default_value = VDD_DIG_ACTIVE,
+ },
+ .ko_attr = RPMRS_ATTR(vdd_dig),
+};
+
+static struct msm_lpm_resource msm_lpm_vdd_mem = {
+ .name = "vdd-mem",
+ .beyond_limits = msm_lpm_beyond_limits_vdd_mem,
+ .aggregate = msm_lpm_aggregate_vdd_mem,
+ .flush = msm_lpm_flush_vdd_mem,
+ .notify = msm_lpm_notify_vdd_mem,
+ .valid = false,
+ .rs_data = {
+ .value = VDD_MEM_ACTIVE,
+ .default_value = VDD_MEM_ACTIVE,
+ },
+ .ko_attr = RPMRS_ATTR(vdd_mem),
+};
+
+static struct msm_lpm_resource msm_lpm_pxo = {
+ .name = "pxo",
+ .beyond_limits = msm_lpm_beyond_limits_pxo,
+ .aggregate = msm_lpm_aggregate_pxo,
+ .flush = msm_lpm_flush_pxo,
+ .notify = msm_lpm_notify_pxo,
+ .valid = false,
+ .rs_data = {
+ .value = MSM_LPM_PXO_ON,
+ .default_value = MSM_LPM_PXO_ON,
+ },
+ .ko_attr = RPMRS_ATTR(pxo),
+};
+
+static struct msm_lpm_resource *msm_lpm_resources[] = {
+ &msm_lpm_vdd_dig,
+ &msm_lpm_vdd_mem,
+ &msm_lpm_pxo,
+ &msm_lpm_l2,
+};
+
+static struct msm_lpm_resource msm_lpm_rpm_ctl = {
+ .name = "rpm_ctl",
+ .beyond_limits = NULL,
+ .aggregate = NULL,
+ .flush = msm_lpm_flush_rpm_ctl,
+ .valid = true,
+ .ko_attr = RPMRS_ATTR(rpm_ctl),
+};
+
+static struct notifier_block msm_lpm_rpm_nblk = {
+ .notifier_call = msm_lpm_rpm_callback,
+};
+
+static struct notifier_block __refdata msm_lpm_cpu_nblk = {
+ .notifier_call = msm_lpm_cpu_callback,
+};
+
+static DEFINE_SPINLOCK(msm_lpm_sysfs_lock);
+
+/* Attribute Definitions */
+static struct attribute *msm_lpm_attributes[] = {
+ &msm_lpm_vdd_dig.ko_attr.attr,
+ &msm_lpm_vdd_mem.ko_attr.attr,
+ &msm_lpm_pxo.ko_attr.attr,
+ &msm_lpm_l2.ko_attr.attr,
+ NULL,
+};
+
+static struct attribute_group msm_lpm_attribute_group = {
+ .attrs = msm_lpm_attributes,
+};
+
+static struct attribute *msm_lpm_rpm_ctl_attribute[] = {
+ &msm_lpm_rpm_ctl.ko_attr.attr,
+ NULL,
+};
+
+static struct attribute_group msm_lpm_rpm_ctl_attr_group = {
+ .attrs = msm_lpm_rpm_ctl_attribute,
+};
+
+#define GET_RS_FROM_ATTR(attr) \
+ (container_of(attr, struct msm_lpm_resource, ko_attr))
+
+/* RPM */
+static struct msm_rpm_request *msm_lpm_create_rpm_request
+ (uint32_t rsc_type, uint32_t rsc_id)
+{
+ struct msm_rpm_request *handle = NULL;
+
+ handle = msm_rpm_create_request(MSM_RPM_CTX_SLEEP_SET,
+ rsc_type,
+ rsc_id, 1);
+ return handle;
+}
+
+static int msm_lpm_send_sleep_data(struct msm_rpm_request *handle,
+ uint32_t key, uint8_t *value)
+{
+ int ret = 0;
+
+ if (!handle)
+ return ret;
+
+ ret = msm_rpm_add_kvp_data_noirq(handle, key, value, MAX_RS_SIZE);
+
+ if (ret < 0) {
+ pr_err("%s: Error adding kvp data key %u, size %d\n",
+ __func__, key, MAX_RS_SIZE);
+ return ret;
+ }
+
+ ret = msm_rpm_send_request_noirq(handle);
+ if (ret < 0) {
+ pr_err("%s: Error sending RPM request key %u, handle 0x%x\n",
+ __func__, key, (unsigned int)handle);
+ return ret;
+ }
+ if (msm_lpm_debug_mask & MSM_LPMRS_DEBUG_RPM)
+ pr_info("Rs key %u, value %u, size %d\n", key,
+ *(unsigned int *)value, MAX_RS_SIZE);
+ return ret;
+}
+
+/* RPM Notifier */
+static int msm_lpm_rpm_callback(struct notifier_block *rpm_nb,
+ unsigned long action,
+ void *rpm_notif)
+{
+ int i;
+ struct msm_lpm_resource *rs = NULL;
+ struct msm_rpm_notifier_data *rpm_notifier_cb =
+ (struct msm_rpm_notifier_data *)rpm_notif;
+
+ if (!msm_lpm_get_rpm_notif)
+ return NOTIFY_DONE;
+
+ if (!(rpm_nb && rpm_notif))
+ return NOTIFY_BAD;
+
+ for (i = 0; i < ARRAY_SIZE(msm_lpm_resources); i++) {
+ rs = msm_lpm_resources[i];
+ if (rs && rs->valid && rs->notify)
+ rs->notify(rpm_notifier_cb);
+ }
+
+ return NOTIFY_OK;
+}
+
+/* SYSFS */
+static ssize_t msm_lpm_resource_attr_show(
+ struct kobject *kobj, struct kobj_attribute *attr, char *buf)
+{
+ struct kernel_param kp;
+ unsigned long flags;
+ unsigned int temp;
+ int rc;
+
+ spin_lock_irqsave(&msm_lpm_sysfs_lock, flags);
+ temp = GET_RS_FROM_ATTR(attr)->enable_low_power;
+ spin_unlock_irqrestore(&msm_lpm_sysfs_lock, flags);
+
+ kp.arg = &temp;
+ rc = param_get_uint(buf, &kp);
+
+ if (rc > 0) {
+ strlcat(buf, "\n", PAGE_SIZE);
+ rc++;
+ }
+
+ return rc;
+}
+
+static ssize_t msm_lpm_resource_attr_store(struct kobject *kobj,
+ struct kobj_attribute *attr, const char *buf, size_t count)
+{
+ struct kernel_param kp;
+ unsigned long flags;
+ unsigned int temp;
+ int rc;
+
+ kp.arg = &temp;
+ rc = param_set_uint(buf, &kp);
+ if (rc)
+ return rc;
+
+ spin_lock_irqsave(&msm_lpm_sysfs_lock, flags);
+ GET_RS_FROM_ATTR(attr)->enable_low_power = temp;
+
+ if (IS_RPM_CTL(GET_RS_FROM_ATTR(attr))) {
+ struct msm_lpm_resource *rs = GET_RS_FROM_ATTR(attr);
+ rs->flush(false);
+ }
+
+ spin_unlock_irqrestore(&msm_lpm_sysfs_lock, flags);
+
+ return count;
+}
+
+/* lpm resource handling functions */
+/* Common */
+static void msm_lpm_notify_common(struct msm_rpm_notifier_data *rpm_notifier_cb,
+ struct msm_lpm_resource *rs)
+{
+ if ((rpm_notifier_cb->rsc_type == rs->rs_data.type) &&
+ (rpm_notifier_cb->rsc_id == rs->rs_data.id) &&
+ (rpm_notifier_cb->key == rs->rs_data.key)) {
+ BUG_ON(rpm_notifier_cb->size > MAX_RS_SIZE);
+
+ if (rs->valid) {
+ if (rpm_notifier_cb->value)
+ memcpy(&rs->rs_data.value,
+ rpm_notifier_cb->value, rpm_notifier_cb->size);
+ else
+ rs->rs_data.value = rs->rs_data.default_value;
+
+ if (msm_lpm_debug_mask & MSM_LPMRS_DEBUG_RPM)
+ pr_info("Notification received Rs %s value %u\n",
+ rs->name, rs->rs_data.value);
+ }
+ }
+}
+
+/* L2 */
+static bool msm_lpm_beyond_limits_l2(struct msm_rpmrs_limits *limits)
+{
+ uint32_t l2;
+ bool ret = true;
+ struct msm_lpm_resource *rs = &msm_lpm_l2;
+
+ if (rs->valid) {
+ uint32_t l2_buf = rs->rs_data.value;
+
+ if (rs->enable_low_power == 1)
+ l2 = MSM_LPM_L2_CACHE_GDHS;
+ else if (rs->enable_low_power == 2)
+ l2 = MSM_LPM_L2_CACHE_HSFS_OPEN;
+ else
+ l2 = MSM_LPM_L2_CACHE_ACTIVE ;
+
+ if (l2_buf > l2)
+ l2 = l2_buf;
+ ret = (l2 > limits->l2_cache);
+
+ if (msm_lpm_debug_mask & MSM_LPMRS_DEBUG_L2)
+ pr_info("%s: l2 buf %u, l2 %u, limits %u\n",
+ __func__, l2_buf, l2, limits->l2_cache);
+ }
+ return ret;
+}
+
+static void msm_lpm_aggregate_l2(struct msm_rpmrs_limits *limits)
+{
+ struct msm_lpm_resource *rs = &msm_lpm_l2;
+
+ if (rs->valid)
+ rs->sleep_value = limits->l2_cache;
+}
+
+static void msm_lpm_flush_l2(int notify_rpm)
+{
+ struct msm_lpm_resource *rs = &msm_lpm_l2;
+ int lpm;
+ int rc;
+
+ switch (rs->sleep_value) {
+ case MSM_LPM_L2_CACHE_HSFS_OPEN:
+ lpm = MSM_SPM_L2_MODE_POWER_COLLAPSE;
+ msm_pm_set_l2_flush_flag(1);
+ break;
+ case MSM_LPM_L2_CACHE_GDHS:
+ lpm = MSM_SPM_L2_MODE_GDHS;
+ break;
+ case MSM_LPM_L2_CACHE_RETENTION:
+ lpm = MSM_SPM_L2_MODE_RETENTION;
+ break;
+ default:
+ case MSM_LPM_L2_CACHE_ACTIVE:
+ lpm = MSM_SPM_L2_MODE_DISABLED;
+ break;
+ }
+
+ rc = msm_spm_l2_set_low_power_mode(lpm, notify_rpm);
+
+ if (rc < 0)
+ pr_err("%s: Failed to set L2 low power mode %d",
+ __func__, lpm);
+
+ if (msm_lpm_debug_mask & MSM_LPMRS_DEBUG_L2)
+ pr_info("%s: Requesting low power mode %d\n",
+ __func__, lpm);
+}
+
+/* RPM CTL */
+static void msm_lpm_flush_rpm_ctl(int notify_rpm)
+{
+ struct msm_lpm_resource *rs = &msm_lpm_rpm_ctl;
+ msm_lpm_send_sleep_data(rs->rs_data.handle,
+ rs->rs_data.key,
+ (uint8_t *)&rs->sleep_value);
+}
+
+/*VDD Dig*/
+static bool msm_lpm_beyond_limits_vdd_dig(struct msm_rpmrs_limits *limits)
+{
+ bool ret = true;
+ struct msm_lpm_resource *rs = &msm_lpm_vdd_dig;
+
+ if (rs->valid) {
+ uint32_t vdd_buf = rs->rs_data.value;
+ uint32_t vdd_dig = rs->enable_low_power ? rs->enable_low_power :
+ rs->rs_data.default_value;
+
+ if (vdd_buf > vdd_dig)
+ vdd_dig = vdd_buf;
+
+ ret = (vdd_dig > limits->vdd_dig_upper_bound);
+
+ if (msm_lpm_debug_mask & MSM_LPMRS_DEBUG_VDD_DIG)
+ pr_info("%s:buf %d vdd dig %d limits%d\n",
+ __func__, vdd_buf, vdd_dig,
+ limits->vdd_dig_upper_bound);
+ }
+ return ret;
+}
+
+static void msm_lpm_aggregate_vdd_dig(struct msm_rpmrs_limits *limits)
+{
+ struct msm_lpm_resource *rs = &msm_lpm_vdd_dig;
+
+ if (rs->valid) {
+ uint32_t vdd_buf = rs->rs_data.value;
+ if (limits->vdd_dig_lower_bound > vdd_buf)
+ rs->sleep_value = limits->vdd_dig_lower_bound;
+ else
+ rs->sleep_value = vdd_buf;
+ }
+}
+
+static void msm_lpm_flush_vdd_dig(int notify_rpm)
+{
+ if (notify_rpm) {
+ struct msm_lpm_resource *rs = &msm_lpm_vdd_dig;
+ msm_lpm_send_sleep_data(rs->rs_data.handle,
+ rs->rs_data.key,
+ (uint8_t *)&rs->sleep_value);
+ }
+}
+
+static void msm_lpm_notify_vdd_dig(struct msm_rpm_notifier_data
+ *rpm_notifier_cb)
+{
+ struct msm_lpm_resource *rs = &msm_lpm_vdd_dig;
+ msm_lpm_notify_common(rpm_notifier_cb, rs);
+}
+
+/*VDD Mem*/
+static bool msm_lpm_beyond_limits_vdd_mem(struct msm_rpmrs_limits *limits)
+{
+ bool ret = true;
+ struct msm_lpm_resource *rs = &msm_lpm_vdd_mem;
+
+ if (rs->valid) {
+ uint32_t vdd_buf = rs->rs_data.value;
+ uint32_t vdd_mem = rs->enable_low_power ? rs->enable_low_power :
+ rs->rs_data.default_value;
+
+ if (vdd_buf > vdd_mem)
+ vdd_mem = vdd_buf;
+
+ ret = (vdd_mem > limits->vdd_mem_upper_bound);
+
+ if (msm_lpm_debug_mask & MSM_LPMRS_DEBUG_VDD_MEM)
+ pr_info("%s:buf %d vdd mem %d limits%d\n",
+ __func__, vdd_buf, vdd_mem,
+ limits->vdd_mem_upper_bound);
+ }
+ return ret;
+}
+
+static void msm_lpm_aggregate_vdd_mem(struct msm_rpmrs_limits *limits)
+{
+ struct msm_lpm_resource *rs = &msm_lpm_vdd_mem;
+
+ if (rs->valid) {
+ uint32_t vdd_buf = rs->rs_data.value;
+ if (limits->vdd_mem_lower_bound > vdd_buf)
+ rs->sleep_value = limits->vdd_mem_lower_bound;
+ else
+ rs->sleep_value = vdd_buf;
+ }
+}
+
+static void msm_lpm_flush_vdd_mem(int notify_rpm)
+{
+ if (notify_rpm) {
+ struct msm_lpm_resource *rs = &msm_lpm_vdd_mem;
+ msm_lpm_send_sleep_data(rs->rs_data.handle,
+ rs->rs_data.key,
+ (uint8_t *)&rs->sleep_value);
+ }
+}
+
+static void msm_lpm_notify_vdd_mem(struct msm_rpm_notifier_data
+ *rpm_notifier_cb)
+{
+ struct msm_lpm_resource *rs = &msm_lpm_vdd_mem;
+ msm_lpm_notify_common(rpm_notifier_cb, rs);
+}
+
+/*PXO*/
+static bool msm_lpm_beyond_limits_pxo(struct msm_rpmrs_limits *limits)
+{
+ bool ret = true;
+ struct msm_lpm_resource *rs = &msm_lpm_pxo;
+
+ if (rs->valid) {
+ uint32_t pxo_buf = rs->rs_data.value;
+ uint32_t pxo = rs->enable_low_power ? MSM_LPM_PXO_OFF :
+ rs->rs_data.default_value;
+
+ if (pxo_buf > pxo)
+ pxo = pxo_buf;
+
+ ret = (pxo > limits->pxo);
+
+ if (msm_lpm_debug_mask & MSM_LPMRS_DEBUG_PXO)
+ pr_info("%s:pxo buf %d pxo %d limits pxo %d\n",
+ __func__, pxo_buf, pxo, limits->pxo);
+ }
+ return ret;
+}
+
+static void msm_lpm_aggregate_pxo(struct msm_rpmrs_limits *limits)
+{
+ struct msm_lpm_resource *rs = &msm_lpm_pxo;
+
+ if (rs->valid) {
+ uint32_t pxo_buf = rs->rs_data.value;
+ if (limits->pxo > pxo_buf)
+ rs->sleep_value = limits->pxo;
+ else
+ rs->sleep_value = pxo_buf;
+
+ if (msm_lpm_debug_mask & MSM_LPMRS_DEBUG_PXO)
+ pr_info("%s: pxo buf %d sleep value %d\n",
+ __func__, pxo_buf, rs->sleep_value);
+ }
+}
+
+static void msm_lpm_flush_pxo(int notify_rpm)
+{
+ if (notify_rpm) {
+ struct msm_lpm_resource *rs = &msm_lpm_pxo;
+ msm_lpm_send_sleep_data(rs->rs_data.handle,
+ rs->rs_data.key,
+ (uint8_t *)&rs->sleep_value);
+ }
+}
+
+static void msm_lpm_notify_pxo(struct msm_rpm_notifier_data
+ *rpm_notifier_cb)
+{
+ struct msm_lpm_resource *rs = &msm_lpm_pxo;
+ msm_lpm_notify_common(rpm_notifier_cb, rs);
+}
+
+/* MPM
+static bool msm_lpm_use_mpm(struct msm_rpmrs_limits *limits)
+{
+ return ((limits->pxo == MSM_LPM_PXO_OFF) ||
+ (limits->vdd_dig_lower_bound <= VDD_DIG_RET_HIGH));
+}*/
+
+/* LPM levels interface */
+bool msm_lpm_level_beyond_limit(struct msm_rpmrs_limits *limits)
+{
+ int i;
+ struct msm_lpm_resource *rs;
+ bool beyond_limit = false;
+
+ for (i = 0; i < ARRAY_SIZE(msm_lpm_resources); i++) {
+ rs = msm_lpm_resources[i];
+ if (rs->beyond_limits && rs->beyond_limits(limits)) {
+ beyond_limit = true;
+ if (msm_lpm_debug_mask & MSM_LPMRS_DEBUG_LVLS)
+ pr_info("%s: %s beyond limit", __func__,
+ rs->name);
+ break;
+ }
+ }
+
+ return beyond_limit;
+}
+
+int msm_lpmrs_enter_sleep(struct msm_rpmrs_limits *limits,
+ bool from_idle, bool notify_rpm)
+{
+ int ret = 0;
+ int i;
+ struct msm_lpm_resource *rs = NULL;
+
+ for (i = 0; i < ARRAY_SIZE(msm_lpm_resources); i++) {
+ rs = msm_lpm_resources[i];
+ if (rs->aggregate)
+ rs->aggregate(limits);
+ }
+
+ msm_lpm_get_rpm_notif = false;
+ for (i = 0; i < ARRAY_SIZE(msm_lpm_resources); i++) {
+ rs = msm_lpm_resources[i];
+ if (rs->flush)
+ rs->flush(notify_rpm);
+ }
+ msm_lpm_get_rpm_notif = true;
+
+ /* MPM Enter sleep
+ if (msm_lpm_use_mpm(limits))
+ msm_mpm_enter_sleep(from_idle);*/
+
+ return ret;
+}
+
+void msm_lpmrs_exit_sleep(uint32_t sclk_count, struct msm_rpmrs_limits *limits,
+ bool from_idle, bool notify_rpm)
+{
+ /* MPM exit sleep
+ if (msm_lpm_use_mpm(limits))
+ msm_mpm_exit_sleep(from_idle);*/
+}
+
+static int msm_lpm_cpu_callback(struct notifier_block *cpu_nb,
+ unsigned long action, void *hcpu)
+{
+ struct msm_lpm_resource *rs = &msm_lpm_l2;
+ switch (action) {
+ case CPU_ONLINE_FROZEN:
+ case CPU_ONLINE:
+ if (num_online_cpus() > 1)
+ rs->rs_data.value = MSM_LPM_L2_CACHE_ACTIVE;
+ break;
+ case CPU_DEAD_FROZEN:
+ case CPU_DEAD:
+ if (num_online_cpus() == 1)
+ rs->rs_data.value = MSM_LPM_L2_CACHE_GDHS;
+ break;
+ }
+ return NOTIFY_OK;
+}
+
+/* RPM CTL */
+static int __devinit msm_lpm_init_rpm_ctl(void)
+{
+ struct msm_lpm_resource *rs = &msm_lpm_rpm_ctl;
+
+ rs->rs_data.handle = msm_rpm_create_request(
+ MSM_RPM_CTX_ACTIVE_SET,
+ rs->rs_data.type,
+ rs->rs_data.id, 1);
+ if (!rs->rs_data.handle)
+ return -EIO;
+
+ rs->valid = true;
+ return 0;
+}
+
+static int __devinit msm_lpm_resource_sysfs_add(void)
+{
+ struct kobject *module_kobj = NULL;
+ struct kobject *low_power_kobj = NULL;
+ struct kobject *mode_kobj = NULL;
+ int rc = 0;
+
+ module_kobj = kset_find_obj(module_kset, KBUILD_MODNAME);
+ if (!module_kobj) {
+ pr_err("%s: cannot find kobject for module %s\n",
+ __func__, KBUILD_MODNAME);
+ rc = -ENOENT;
+ goto resource_sysfs_add_exit;
+ }
+
+ low_power_kobj = kobject_create_and_add(
+ "enable_low_power", module_kobj);
+ if (!low_power_kobj) {
+ pr_err("%s: cannot create kobject\n", __func__);
+ rc = -ENOMEM;
+ goto resource_sysfs_add_exit;
+ }
+
+ mode_kobj = kobject_create_and_add(
+ "mode", module_kobj);
+ if (!mode_kobj) {
+ pr_err("%s: cannot create kobject\n", __func__);
+ rc = -ENOMEM;
+ goto resource_sysfs_add_exit;
+ }
+
+ rc = sysfs_create_group(low_power_kobj, &msm_lpm_attribute_group);
+ if (rc) {
+ pr_err("%s: cannot create kobject attribute group\n", __func__);
+ goto resource_sysfs_add_exit;
+ }
+
+ rc = sysfs_create_group(mode_kobj, &msm_lpm_rpm_ctl_attr_group);
+ if (rc) {
+ pr_err("%s: cannot create kobject attribute group\n", __func__);
+ goto resource_sysfs_add_exit;
+ }
+
+resource_sysfs_add_exit:
+ if (rc) {
+ if (low_power_kobj)
+ sysfs_remove_group(low_power_kobj,
+ &msm_lpm_attribute_group);
+ kobject_del(low_power_kobj);
+ kobject_del(mode_kobj);
+ }
+
+ return rc;
+}
+
+late_initcall(msm_lpm_resource_sysfs_add);
+
+static int __devinit msm_lpmrs_probe(struct platform_device *pdev)
+{
+ struct device_node *node = NULL;
+ char *key = NULL;
+ int ret = 0;
+
+ for_each_child_of_node(pdev->dev.of_node, node) {
+ struct msm_lpm_resource *rs = NULL;
+ const char *val;
+ int i;
+
+ key = "qcom,name";
+ ret = of_property_read_string(node, key, &val);
+ if (ret) {
+ pr_err("Cannot read string\n");
+ goto fail;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(msm_lpm_resources); i++) {
+ char *lpmrs_name = msm_lpm_resources[i]->name;
+ if (!msm_lpm_resources[i]->valid &&
+ !strncmp(val, lpmrs_name, strnlen(lpmrs_name,
+ MAX_RS_NAME))) {
+ rs = msm_lpm_resources[i];
+ break;
+ }
+ }
+
+ if (!rs) {
+ pr_err("LPM resource not found\n");
+ continue;
+ }
+
+ key = "qcom,type";
+ ret = of_property_read_u32(node, key, &rs->rs_data.type);
+ if (ret) {
+ pr_err("Failed to read type\n");
+ goto fail;
+ }
+
+ key = "qcom,id";
+ ret = of_property_read_u32(node, key, &rs->rs_data.id);
+ if (ret) {
+ pr_err("Failed to read id\n");
+ goto fail;
+ }
+
+ key = "qcom,key";
+ ret = of_property_read_u32(node, key, &rs->rs_data.key);
+ if (ret) {
+ pr_err("Failed to read key\n");
+ goto fail;
+ }
+
+ rs->rs_data.handle = msm_lpm_create_rpm_request(
+ rs->rs_data.type, rs->rs_data.id);
+
+ if (!rs->rs_data.handle) {
+ pr_err("%s: Failed to allocate handle for %s\n",
+ __func__, rs->name);
+ ret = -1;
+ goto fail;
+ }
+
+ rs->valid = true;
+ }
+ msm_rpm_register_notifier(&msm_lpm_rpm_nblk);
+ msm_lpm_init_rpm_ctl();
+ register_hotcpu_notifier(&msm_lpm_cpu_nblk);
+ /* For UP mode, set the default to HSFS OPEN*/
+ if (num_possible_cpus() == 1) {
+ msm_lpm_l2.rs_data.default_value = MSM_LPM_L2_CACHE_HSFS_OPEN;
+ msm_lpm_l2.rs_data.value = MSM_LPM_L2_CACHE_HSFS_OPEN;
+ }
+ return 0;
+fail:
+ return ret;
+}
+
+static struct of_device_id msm_lpmrs_match_table[] = {
+ {.compatible = "qcom,lpm-resources"},
+ {},
+};
+
+static struct platform_driver msm_lpmrs_driver = {
+ .probe = msm_lpmrs_probe,
+ .driver = {
+ .name = "lpm-resources",
+ .owner = THIS_MODULE,
+ .of_match_table = msm_lpmrs_match_table,
+ },
+};
+
+int __init msm_lpmrs_module_init(void)
+{
+ return platform_driver_register(&msm_lpmrs_driver);
+}
diff --git a/arch/arm/mach-msm/lpm_resources.h b/arch/arm/mach-msm/lpm_resources.h
new file mode 100644
index 0000000..9973fbf
--- /dev/null
+++ b/arch/arm/mach-msm/lpm_resources.h
@@ -0,0 +1,128 @@
+/* Copyright (c) 2012, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that 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.
+ *
+ */
+
+#ifndef __ARCH_ARM_MACH_MSM_LPM_RESOURCES_H
+#define __ARCH_ARM_MACH_MSM_LPM_RESOURCES_H
+
+#include "pm.h"
+
+enum {
+ MSM_LPM_PXO_OFF = 0,
+ MSM_LPM_PXO_ON = 1,
+};
+
+enum {
+ MSM_LPM_L2_CACHE_HSFS_OPEN = 0,
+ MSM_LPM_L2_CACHE_GDHS = 1,
+ MSM_LPM_L2_CACHE_RETENTION = 2,
+ MSM_LPM_L2_CACHE_ACTIVE = 3,
+};
+
+struct msm_rpmrs_limits {
+ uint32_t pxo;
+ uint32_t l2_cache;
+ uint32_t vdd_mem_upper_bound;
+ uint32_t vdd_mem_lower_bound;
+ uint32_t vdd_dig_upper_bound;
+ uint32_t vdd_dig_lower_bound;
+
+ uint32_t latency_us[NR_CPUS];
+ uint32_t power[NR_CPUS];
+};
+
+struct msm_rpmrs_level {
+ enum msm_pm_sleep_mode sleep_mode;
+ struct msm_rpmrs_limits rs_limits;
+ bool available;
+ uint32_t latency_us;
+ uint32_t steady_state_power;
+ uint32_t energy_overhead;
+ uint32_t time_overhead_us;
+};
+
+#ifdef CONFIG_MSM_RPM_SMD
+
+/**
+ * msm_lpm_level_beyond_limit() - Check if the resources in a low power level
+ * is beyond the limits of the driver votes received for those resources.This
+ * function is used by lpm_levels to eliminate any low power level that cannot
+ * be entered.
+ *
+ * @limits: pointer to the resource limits of a low power level.
+ *
+ * returns true if the resource limits are beyond driver resource votes.
+ * false otherwise.
+ */
+bool msm_lpm_level_beyond_limit(struct msm_rpmrs_limits *limits);
+
+/**
+ * msm_lpmrs_enter_sleep() - Enter sleep flushes the sleep votes of low power
+ * resources to the RPM driver, also configure the MPM if needed depending
+ * on the low power mode being entered. L2 low power mode is also set in
+ * this function.
+
+ * @limits: pointer to the resource limits of the low power mode being entered.
+ * @from_idle: bool to determine if this call being made as a part of
+ * idle power collapse.
+ * @notify_rpm: bool that informs if this is an RPM notified power collapse.
+ *
+ * returns 0 on success.
+ */
+int msm_lpmrs_enter_sleep(struct msm_rpmrs_limits *limits,
+ bool from_idle, bool notify_rpm);
+
+/**
+ * msm_lpmrs_exit_sleep() - Exit sleep, reset the MPM and L2 mode.
+ * @ sclk_count - Sleep Clock count.
+ * @ limits: pointer to resource limits of the most recent low power mode.
+ * @from_idle: bool to determine if this call being made as a part of
+ * idle power collapse.
+ * @notify_rpm: bool that informs if this is an RPM notified power collapse.
+ */
+void msm_lpmrs_exit_sleep(uint32_t sclk_count, struct msm_rpmrs_limits *limits,
+ bool from_idle, bool notify_rpm);
+/**
+ * msm_lpmrs_module_init() - Init function that parses the device tree to
+ * get the low power resource attributes and registers with RPM driver for
+ * callback notification.
+ *
+ * returns 0 on success.
+ */
+int __init msm_lpmrs_module_init(void);
+
+#else
+static inline bool msm_lpm_level_beyond_limit(struct msm_rpmrs_limits *limits)
+{
+ return true;
+}
+
+static inline int msm_lpmrs_enter_sleep(struct msm_rpmrs_limits *limits,
+ bool from_idle, bool notify_rpm)
+{
+ return 0;
+}
+
+static inline void msm_lpmrs_exit_sleep(uint32_t sclk_count,
+ struct msm_rpmrs_limits *limits, bool from_idle,
+ bool notify_rpm)
+{
+ return;
+}
+
+static inline int __init msm_lpmrs_module_init(void)
+{
+ return 0;
+}
+#endif /* CONFIG_MSM_RPM_SMD */
+
+#endif