--- /dev/null
+/*
+ * Rockchip pm_test Driver
+ *
+ * Copyright (c) 2015 Rockchip Electronics Co. Ltd.
+ * Author: Finley Xiao <finley.xiao@rock-chips.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License 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.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/cpufreq.h>
+#include <linux/fs.h>
+#include <linux/module.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/uaccess.h>
+#include "../../../../drivers/regulator/internal.h"
+
+#define CLK_NR_CLKS 550
+
+static int cpu_usage_run;
+
+static DEFINE_PER_CPU(struct work_struct, work_cpu_usage);
+static DEFINE_PER_CPU(struct workqueue_struct *, workqueue_cpu_usage);
+
+static const char pi_result[] = "3141592653589793238462643383279528841971693993751058209749445923078164062862089986280348253421170679821480865132823664709384469555822317253594081284811174502841270193852115559644622948954930381964428810975665933446128475648233786783165271201991456485669234634861045432664821339360726024914127372458706606315588174881520920962829254917153643678925903611330530548820466521384146951941511609433057273657595919530921861173819326117931051185480744623799627495673518857527248912279381830119491298336733624406566438602139494639522473719070217986943702770539217176293176752384674818467669451320005681271452635608277857713427577896091736371787214684409012249534301465495853710579227968925892354201995611212902196864344181598136297747713099605187072113499999983729780499510597317328160963185";
+
+struct pm_attribute {
+ struct attribute attr;
+ ssize_t (*show)(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf);
+ ssize_t (*store)(struct kobject *kobj, struct kobj_attribute *attr,
+ const char *buf, size_t n);
+};
+
+static ssize_t clk_rate_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf)
+{
+ char *str = buf;
+
+ str += sprintf(str, "get clk rate:\n");
+ str += sprintf(str,
+ " echo get [clk_name] > /sys/pm_tests/clk_rate\n");
+ str += sprintf(str, "set clk rate:\n");
+ str += sprintf(str,
+ " echo rawset [clk_name] [rate(Hz)] > /sys/pm_tests/clk_rate\n");
+ str += sprintf(str, "enable clk:\n");
+ str += sprintf(str,
+ " echo open [clk_name] > /sys/pm_tests/clk_rate\n");
+ str += sprintf(str, "disable clk:\n");
+ str += sprintf(str,
+ " echo close [clk_name] > /sys/pm_tests/clk_rate\n");
+ if (str != buf)
+ *(str - 1) = '\n';
+
+ return (str - buf);
+}
+
+static struct clk *clk_get_by_name(const char *clk_name)
+{
+ const char *name;
+ struct clk *clk;
+ struct device_node *np;
+ struct of_phandle_args clkspec;
+ int i;
+
+ np = of_find_node_by_name(NULL, "clock-controller");
+ clkspec.np = np;
+ clkspec.args_count = 1;
+ for (i = 1; i < CLK_NR_CLKS; i++) {
+ clkspec.args[0] = i;
+ clk = of_clk_get_from_provider(&clkspec);
+ if (IS_ERR_OR_NULL(clk))
+ continue;
+ name = __clk_get_name(clk);
+ if (strlen(name) != strlen(clk_name))
+ continue;
+ if (!strncmp(name, clk_name, strlen(clk_name)))
+ break;
+ }
+
+ if (i == CLK_NR_CLKS)
+ clk = NULL;
+
+ return clk;
+}
+
+static int clk_rate_get(const char *buf)
+{
+ char cmd[20], clk_name[20];
+ unsigned long rate;
+ struct clk *clk;
+ int ret;
+
+ ret = sscanf(buf, "%s %s", cmd, clk_name);
+ if (ret != 2)
+ return -EINVAL;
+
+ clk = clk_get_by_name(clk_name);
+ if (IS_ERR_OR_NULL(clk)) {
+ pr_err("get clock error\n");
+ return PTR_ERR(clk);
+ }
+
+ rate = clk_get_rate(clk);
+
+ pr_info("%s %lu Hz\n", clk_name, rate);
+
+ clk_put(clk);
+
+ return 0;
+}
+
+static int clk_rate_rawset(const char *buf)
+{
+ char cmd[20], clk_name[20];
+ struct clk *clk;
+ unsigned long rate;
+ int ret;
+
+ ret = sscanf(buf, "%s %s %lu", cmd, clk_name, &rate);
+ if (ret != 3)
+ return -EINVAL;
+
+ clk = clk_get_by_name(clk_name);
+ if (IS_ERR_OR_NULL(clk)) {
+ pr_err("get %s error\n", clk_name);
+ return PTR_ERR(clk);
+ }
+
+ ret = clk_set_rate(clk, rate);
+ if (ret) {
+ pr_err("set %s rate %d error\n", clk_name, ret);
+ return ret;
+ }
+
+ pr_debug("%s %s %lu\n", cmd, clk_name, rate);
+
+ clk_put(clk);
+
+ return ret;
+}
+
+static int clk_open(const char *buf)
+{
+ char cmd[20], clk_name[20];
+ struct clk *clk;
+ int ret;
+
+ ret = sscanf(buf, "%s %s", cmd, clk_name);
+ if (ret != 2)
+ return -EINVAL;
+
+ clk = clk_get_by_name(clk_name);
+ if (IS_ERR_OR_NULL(clk)) {
+ pr_err("get clock %s error\n", clk_name);
+ return PTR_ERR(clk);
+ }
+
+ clk_prepare_enable(clk);
+
+ pr_debug("%s %s\n", cmd, clk_name);
+
+ clk_put(clk);
+
+ return 0;
+}
+
+static int clk_close(const char *buf)
+{
+ char cmd[20], clk_name[20];
+ struct clk *clk;
+ int ret;
+
+ ret = sscanf(buf, "%s %s", cmd, clk_name);
+ if (ret != 2)
+ return -EINVAL;
+
+ clk = clk_get_by_name(clk_name);
+ if (IS_ERR_OR_NULL(clk)) {
+ pr_err("get clock %s error\n", clk_name);
+ return PTR_ERR(clk);
+ }
+
+ clk_disable_unprepare(clk);
+
+ pr_debug("%s %s\n", cmd, clk_name);
+
+ clk_put(clk);
+
+ return 0;
+}
+
+static ssize_t clk_rate_store(struct kobject *kobj, struct kobj_attribute *attr,
+ const char *buf, size_t n)
+{
+ char cmd[20];
+ int ret;
+
+ ret = sscanf(buf, "%s", cmd);
+ if (ret != 1)
+ return -EINVAL;
+
+ if (!strncmp(cmd, "get", strlen("get"))) {
+ ret = clk_rate_get(buf);
+ if (ret)
+ pr_err("get clk err\n");
+ } else if (!strncmp(cmd, "rawset", strlen("rawset"))) {
+ ret = clk_rate_rawset(buf);
+ if (ret)
+ pr_err("rawset clk err\n");
+ } else if (!strncmp(cmd, "open", strlen("open"))) {
+ ret = clk_open(buf);
+ if (ret)
+ pr_err("open clk err\n");
+ } else if (!strncmp(cmd, "close", strlen("close"))) {
+ ret = clk_close(buf);
+ if (ret)
+ pr_err("close clk err\n");
+ } else {
+ pr_info("unsupported cmd(%s)\n", cmd);
+ }
+
+ return n;
+}
+
+static ssize_t clk_volt_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf)
+{
+ char *str = buf;
+
+ str += sprintf(str, "get voltage:\n");
+ str += sprintf(str,
+ " echo get [regulaotr_name] > /sys/pm_tests/clk_volt\n");
+ str += sprintf(str, "set voltage:\n");
+ str += sprintf(str,
+ " echo set [regulaotr_name] [voltage(uV)] > /sys/pm_tests/clk_volt\n");
+ if (str != buf)
+ *(str - 1) = '\n';
+
+ return (str - buf);
+}
+
+static int clk_volt_get(const char *buf)
+{
+ char cmd[20], reg_name[20];
+ unsigned int ret;
+ struct regulator *regulator;
+
+ ret = sscanf(buf, "%s %s", cmd, reg_name);
+ if (ret != 2)
+ return -EINVAL;
+
+ regulator = regulator_get(NULL, reg_name);
+ if (IS_ERR_OR_NULL(regulator)) {
+ pr_err("get regulator %s error\n", reg_name);
+ return PTR_ERR(regulator);
+ }
+
+ ret = regulator_get_voltage(regulator);
+
+ pr_info("%s %duV\n", reg_name, ret);
+
+ regulator_put(regulator);
+
+ return 0;
+}
+
+static void break_up_regulator_limit(struct regulator_dev *rdev, int min_uV,
+ int max_uV)
+{
+ struct regulator *regulator;
+
+ list_for_each_entry(regulator, &rdev->consumer_list, list) {
+ if (!regulator->min_uV && !regulator->max_uV)
+ continue;
+ pr_debug("%s min=%d, max=%d", dev_name(regulator->dev),
+ regulator->min_uV, regulator->max_uV);
+ regulator->min_uV = min_uV;
+ regulator->max_uV = max_uV;
+ }
+}
+
+static int clk_volt_set(const char *buf)
+{
+ char cmd[20], reg_name[20];
+ unsigned int ret;
+ struct regulator *regulator;
+ unsigned int volt;
+ struct regulator_dev *rdev;
+ int max_uV;
+
+ ret = sscanf(buf, "%s %s %u", cmd, reg_name, &volt);
+ if (ret != 3)
+ return -EINVAL;
+
+ regulator = regulator_get(NULL, reg_name);
+ if (IS_ERR_OR_NULL(regulator)) {
+ pr_info("get regulator %s error\n", reg_name);
+ return PTR_ERR(regulator);
+ }
+
+ rdev = regulator->rdev;
+ max_uV = rdev->constraints->max_uV;
+
+ if (volt > max_uV) {
+ pr_err("invalid volt, max %d uV\n", max_uV);
+ return -EINVAL;
+ }
+
+ mutex_lock(&rdev->mutex);
+ break_up_regulator_limit(rdev, volt, max_uV);
+ mutex_unlock(&rdev->mutex);
+
+ ret = regulator_set_voltage(regulator, volt, max_uV);
+ if (ret) {
+ pr_err("set voltage %d error\n", ret);
+ regulator_put(regulator);
+ return ret;
+ }
+
+ pr_debug("set %s %duV\n", reg_name, volt);
+
+ regulator_put(regulator);
+
+ return 0;
+}
+
+static ssize_t clk_volt_store(struct kobject *kobj, struct kobj_attribute *attr,
+ const char *buf, size_t n)
+{
+ unsigned int ret;
+ char cmd[20];
+
+ ret = sscanf(buf, "%s", cmd);
+ if (ret != 1)
+ return -EINVAL;
+
+ if (!strncmp(cmd, "get", strlen("get"))) {
+ ret = clk_volt_get(buf);
+ if (ret)
+ pr_err("get volt err\n");
+ } else if (!strncmp(cmd, "set", strlen("set"))) {
+ ret = clk_volt_set(buf);
+ if (ret)
+ pr_err("set volt err\n");
+ } else {
+ pr_err("unsupported cmd(%s)\n", cmd);
+ }
+
+ return n;
+}
+
+static ssize_t cpu_usage_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf)
+{
+ char *str = buf;
+
+ str += sprintf(str,
+ "while(1) test:\n");
+ str += sprintf(str,
+ " cpu 0-3: echo start 0 0 > /sys/pm_tests/cpu_usage\n");
+ str += sprintf(str,
+ " cpu 4-7: echo start 0 1 > /sys/pm_tests/cpu_usage\n");
+ str += sprintf(str,
+ " cpu 0-7: echo start 0 2 > /sys/pm_tests/cpu_usage\n");
+ str += sprintf(str,
+ "calc_pi test:\n");
+ str += sprintf(str,
+ " cpu 0-3: echo start 1 0 > /sys/pm_tests/cpu_usage\n");
+ str += sprintf(str,
+ " cpu 4-7: echo start 1 1 > /sys/pm_tests/cpu_usage\n");
+ str += sprintf(str,
+ " cpu 0-7: echo start 1 2 > /sys/pm_tests/cpu_usage\n");
+ str += sprintf(str,
+ "stop test:\n");
+ str += sprintf(str,
+ " cpu 0-7: echo stop -1 -1 > /sys/pm_tests/cpu_usage\n");
+ if (str != buf)
+ *(str - 1) = '\n';
+
+ return (str - buf);
+}
+
+static inline int calc_pi(void)
+{
+ int bit = 0, i = 0;
+ long a = 10000, b = 0, c = 2800, d = 0, e = 0, g = 0;
+ int *result;
+ long *f;
+ int len = 0;
+ char *pi_calc, *pi_temp;
+ char *pi_just = (char *)&pi_result[0];
+ size_t pi_just_size = sizeof(pi_result);
+
+ result = vmalloc(10000 * sizeof(int));
+ if (!result)
+ return -ENOMEM;
+
+ f = vmalloc(2801 * sizeof(long));
+ if (!f)
+ return -ENOMEM;
+
+ pi_calc = vmalloc(1000 * sizeof(char));
+ if (!pi_calc)
+ return -ENOMEM;
+
+ for (; b - c; )
+ f[b++] = a / 5;
+ for (; d = 0, g = c * 2; c -= 14, result[bit++] = e + d / a, e = d % a)
+ for (b = c; d += f[b] * a, f[b] = d % --g, d /= g--, --b;
+ d *= b)
+ ;
+
+ pi_temp = pi_calc;
+ for (i = 0; i < bit; i++)
+ len += sprintf(pi_temp + len, "%d", result[i]);
+
+ if (strncmp(pi_just, pi_calc, pi_just_size) == 0) {
+ vfree(result);
+ vfree(f);
+ vfree(pi_calc);
+ } else {
+ vfree(result);
+ vfree(f);
+ vfree(pi_calc);
+
+ while (1)
+ pr_err("calc_pi error\n");
+ }
+
+ return 0;
+}
+
+static void calc_pi2(void)
+{
+ calc_pi();
+ calc_pi();
+}
+
+static void calc_pi4(void)
+{
+ calc_pi2();
+ calc_pi2();
+}
+
+static void calc_pi8(void)
+{
+ calc_pi4();
+ calc_pi4();
+}
+
+static void calc_pi16(void)
+{
+ calc_pi8();
+ calc_pi8();
+}
+
+/* 0xffffffc000097468 - 0xffffffc0000949c4 = 10916 byte*/
+static void calc_pi32(void)
+{
+ calc_pi16();
+ calc_pi16();
+}
+
+/* 0xffffffc000099ee8 - 0xffffffc0000949c4 = 21796 byte*/
+static void calc_pi64(void)
+{
+ calc_pi32();
+ calc_pi32();
+}
+
+/* 0xffffffc00009f3e8 - 0xffffffc0000949c4 = 43556 byte*/
+static void calc_pi128(void)
+{
+ calc_pi64();
+ calc_pi64();
+}
+
+/* 0xffffffc0000a9de8 - 0xffffffc0000949c4 = 87076 byte*/
+static void calc_pi256(void)
+{
+ calc_pi128();
+ calc_pi128();
+}
+
+/* 0xffffffc0000bf1e8 - 0xffffffc0000949c4 = 174116 byte*/
+static void calc_pi512(void)
+{
+ calc_pi256();
+ calc_pi256();
+}
+
+/* 0xffffffc0000ea9e8 - 0xffffffc0000949c4 = 352295 byte*/
+static void calc_pi1024(void)
+{
+ calc_pi512();
+ calc_pi512();
+}
+
+static void calc_pi_large(void)
+{
+ calc_pi1024();
+}
+
+static void handler_cpu_usage(struct work_struct *work)
+{
+ while (cpu_usage_run == 0)
+ barrier();
+
+ while (cpu_usage_run == 1)
+ calc_pi_large();
+}
+
+static ssize_t cpu_usage_store(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf, size_t n)
+{
+ struct workqueue_struct *workqueue;
+ struct work_struct *work;
+ char cmd[20];
+ int cpu;
+ int ret;
+ int usage = 0;
+ int cluster = 0;
+
+ ret = sscanf(buf, "%s %d %d", cmd, &usage, &cluster);
+ if (ret != 3)
+ return -EINVAL;
+
+ if (!strncmp(cmd, "start", strlen("start"))) {
+ if (usage == 0)
+ pr_info("start while(1) test\n");
+ else if (usage == 1)
+ pr_info("start pi test\n");
+ else
+ return 0;
+
+ cpu_usage_run = usage;
+ for_each_online_cpu(cpu) {
+ work = &per_cpu(work_cpu_usage, cpu);
+ workqueue = per_cpu(workqueue_cpu_usage, cpu);
+ if (!work || !workqueue) {
+ pr_err("work or workqueue NULL\n");
+ return n;
+ }
+
+ if (cluster == 0 && cpu < 4)
+ queue_work_on(cpu, workqueue, work);
+ else if (cluster == 1 && cpu >= 4)
+ queue_work_on(cpu, workqueue, work);
+ else if (cluster == 2)
+ queue_work_on(cpu, workqueue, work);
+ }
+ } else if (!strncmp(cmd, "stop", strlen("stop"))) {
+ if (cpu_usage_run == 0)
+ pr_info("stop while(1) test\n");
+ else if (cpu_usage_run == 1)
+ pr_info("stop pi test\n");
+ cpu_usage_run = usage;
+ }
+
+ return n;
+}
+
+static struct pm_attribute pm_attrs[] = {
+ __ATTR(clk_rate, 0644, clk_rate_show, clk_rate_store),
+ __ATTR(clk_volt, 0644, clk_volt_show, clk_volt_store),
+ __ATTR(cpu_usage, 0644, cpu_usage_show, cpu_usage_store),
+};
+
+static int __init pm_test_init(void)
+{
+ struct kobject *kobject;
+ struct workqueue_struct *workqueue;
+ struct work_struct *work;
+ int i, cpu, ret = 0;
+
+ kobject = kobject_create_and_add("pm_tests", NULL);
+ if (!kobject)
+ return -ENOMEM;
+
+ for (i = 0; i < ARRAY_SIZE(pm_attrs); i++) {
+ ret = sysfs_create_file(kobject, &pm_attrs[i].attr);
+ if (ret) {
+ pr_err("create file index %d error\n", i);
+ return ret;
+ }
+ }
+
+ workqueue = create_workqueue("workqueue_cpu_usage");
+ if (!workqueue) {
+ pr_err("workqueue NULL\n");
+ return -EINVAL;
+ }
+
+ for_each_online_cpu(cpu) {
+ work = &per_cpu(work_cpu_usage, cpu);
+ if (!work) {
+ pr_err("work NULL\n");
+ return -EINVAL;
+ }
+ INIT_WORK(work, handler_cpu_usage);
+ per_cpu(workqueue_cpu_usage, cpu) = workqueue;
+ }
+
+ return ret;
+}
+
+late_initcall(pm_test_init);
+
+MODULE_DESCRIPTION("Rockchip pm_test driver");
+MODULE_AUTHOR("Finley Xiao <finley.xiao@rock-chips.com>");
+MODULE_LICENSE("GPL v2");
projects / firefly-linux-kernel-4.4.55.git / commitdiff