--- /dev/null
+/*
+ * drivers/amlogic/ddr_window/ddr_window.c
+ *
+ * Copyright (C) 2017 Amlogic, Inc. 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 as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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/version.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/printk.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/sysfs.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+#include <linux/workqueue.h>
+#include <linux/timer.h>
+#include <linux/amlogic/cpu_version.h>
+
+static unsigned int reg_base;
+static void __iomem *map;
+
+static unsigned int reg_base_debug;
+static void __iomem *map_debug;
+
+static unsigned int reg_base_debug_a;
+static void __iomem *map_debug_a;
+
+static ssize_t window_reg_show(struct class *cla,
+ struct class_attribute *attr, char *buf)
+{
+ unsigned int val;
+
+ if (reg_base == 0) {
+ pr_err("please set register base first\n");
+ return -EINVAL;
+ }
+ map = NULL;
+ map = (void *)ioremap(reg_base, 4);
+ pr_err("map:%p, base:%x\n", map, reg_base);
+ if (map) {
+ val = readl(map);
+ iounmap(map);
+ return sprintf(buf, "0x%08x\n", val);
+ }
+
+ return 0;
+}
+
+static ssize_t window_reg_store(struct class *cla,
+ struct class_attribute *attr, const char *buf, size_t count)
+{
+ int ret = -1, i;
+ unsigned int val;
+ char *arg[2] = {}, *para, *buf_work, *p;
+
+ map = NULL;
+ buf_work = kstrdup(buf, GFP_KERNEL);
+ p = buf_work;
+ for (i = 0; i < 2; i++) {
+ para = strsep(&p, " ");
+ if (para == NULL)
+ break;
+
+ arg[i] = para;
+ }
+ if (i < 1 || i > 2) {
+ ret = 1;
+ goto error;
+ }
+
+ ret = kstrtouint((const char *)arg[0], 16, ®_base);
+ if (i == 2) {
+ ret = kstrtouint((const char *)arg[1], 16, &val);
+ map = (void *)ioremap(reg_base, 4);
+ if (map) {
+ writel(val, map);
+ iounmap(map);
+ pr_err("set 0x%08x to %08x\n", reg_base, val);
+ }
+ } else {
+ pr_err("set reg base to 0x%08x\n", reg_base);
+ }
+error:
+ kfree(buf_work);
+ if (ret)
+ pr_err("error\n");
+
+ return count;
+}
+
+static ssize_t reg_debug_show(struct class *cla,
+ struct class_attribute *attr, char *buf)
+{
+
+
+ unsigned int val;
+
+ if (reg_base_debug == 0) {
+ pr_err("please set register base first\n");
+ return -EINVAL;
+ }
+ map_debug = NULL;
+ map_debug = (void *)ioremap(reg_base_debug, 4);
+ pr_err("map:%p, base:%x\n", map_debug, reg_base_debug);
+ if (map_debug) {
+ val = readl(map_debug);
+ iounmap(map_debug);
+ return sprintf(buf, "0x%08x\n", val);
+ }
+
+ return 0;
+}
+
+static ssize_t reg_debug_store(struct class *cla,
+ struct class_attribute *attr, const char *buf, size_t count)
+{
+
+ int ret = -1, i;
+ unsigned int val;
+ char *arg[2] = {}, *para, *buf_work, *p;
+
+ map_debug = NULL;
+ buf_work = kstrdup(buf, GFP_KERNEL);
+ p = buf_work;
+ for (i = 0; i < 2; i++) {
+ para = strsep(&p, " ");
+ if (para == NULL)
+ break;
+
+ arg[i] = para;
+ }
+ if (i < 1 || i > 2) {
+ ret = 1;
+ goto error;
+ }
+
+ ret = kstrtouint((const char *)arg[0], 16, ®_base_debug);
+ if (i == 2) {
+ ret = kstrtouint((const char *)arg[1], 16, &val);
+ map_debug = (void *)ioremap(reg_base_debug, 4);
+ if (map_debug) {
+ writel(val, map_debug);
+ iounmap(map_debug);
+ pr_err("set 0x%08x to %08x\n", reg_base_debug, val);
+ }
+ } else {
+ pr_err("set reg base to 0x%08x\n", reg_base_debug);
+ }
+error:
+ kfree(buf_work);
+ if (ret)
+ pr_err("error\n");
+ return count;
+}
+
+static ssize_t reg_debug_a_show(struct class *cla,
+ struct class_attribute *attr, char *buf)
+{
+ unsigned int val;
+
+ if (reg_base_debug_a == 0) {
+ pr_err("please set register base first\n");
+ return -EINVAL;
+ }
+ map_debug_a = NULL;
+ map_debug_a = (void *)ioremap(reg_base_debug_a, 4);
+ pr_err("map:%p, base:%x\n", map_debug_a, reg_base_debug_a);
+ if (map_debug_a) {
+ val = readl(map_debug_a);
+ iounmap(map_debug_a);
+ return sprintf(buf, "0x%08x\n", val);
+ }
+
+ return 0;
+}
+
+
+
+
+static ssize_t reg_debug_a_store(struct class *cla,
+ struct class_attribute *attr, const char *buf, size_t count)
+{
+
+ int ret = -1, i;
+ unsigned int val;
+ char *arg[2] = {}, *para, *buf_work, *p;
+
+ map_debug_a = NULL;
+ buf_work = kstrdup(buf, GFP_KERNEL);
+ p = buf_work;
+ for (i = 0; i < 2; i++) {
+ para = strsep(&p, " ");
+ if (para == NULL)
+ break;
+ arg[i] = para;
+ }
+
+ if (i < 1 || i > 2) {
+ ret = 1;
+ goto error;
+ }
+
+ ret = kstrtouint((const char *)arg[0], 16, ®_base_debug_a);
+ if (i == 2) {
+ ret = kstrtouint((const char *)arg[1], 16, &val);
+ map_debug_a = (void *)ioremap(reg_base_debug_a, 4);
+ if (map_debug_a) {
+ writel(val, map_debug_a);
+ iounmap(map_debug_a);
+ pr_err("set 0x%08x to %08x\n", reg_base_debug_a, val);
+ }
+ } else {
+ pr_err("set reg base to 0x%08x\n", reg_base_debug_a);
+ }
+error:
+ kfree(buf_work);
+ if (ret)
+ pr_err("error\n");
+
+ return count;
+}
+
+static ssize_t cpu_type_show(struct class *cla,
+ struct class_attribute *attr, char *buf)
+{
+ int cpu_type;
+
+ cpu_type = get_meson_cpu_version(0);
+ return sprintf(buf, "%x\n", cpu_type);
+}
+
+static struct class_attribute ddr_window_attr[] = {
+ __ATTR(window_reg, 0664, window_reg_show, window_reg_store),
+ __ATTR(reg_debug, 0664, reg_debug_show, reg_debug_store),
+ __ATTR(reg_debug_a, 0664, reg_debug_a_show, reg_debug_a_store),
+ __ATTR_RO(cpu_type),
+ __ATTR_NULL
+};
+
+static struct class ddr_window_class = {
+ .name = "ddr_window",
+ .class_attrs = ddr_window_attr,
+};
+
+static int ddr_window_probe(struct platform_device *pdev)
+{
+ int r;
+
+ pr_err("ddr_window,module_VER_:%s\n", DDR_WINDOW_KO_VER);
+ r = class_register(&ddr_window_class);
+ if (r) {
+ pr_err("%s, class regist failed\n", __func__);
+ return -EINVAL;
+ }
+ reg_base = 0;
+ return 0;
+}
+
+static int ddr_window_remove(struct platform_device *pdev)
+{
+ class_unregister(&ddr_window_class);
+ return 0;
+}
+
+static struct platform_driver ddr_window = {
+ .driver = {
+ .name = "ddr_window",
+ .owner = THIS_MODULE,
+ },
+ .probe = ddr_window_probe,
+ .remove = ddr_window_remove,
+};
+
+static int __init ddr_window_init(void)
+{
+ struct platform_device *pdev;
+ int ret;
+
+ pdev = platform_device_alloc("ddr_window", 0);
+ if (!pdev) {
+ pr_err("%s, alloc pdev failed\n", __func__);
+ return -EINVAL;
+ }
+ ret = platform_device_add(pdev);
+ if (ret) {
+ pr_err("%s, add pdev failed\n", __func__);
+ platform_device_del(pdev);
+ return -EINVAL;
+ }
+ return platform_driver_register(&ddr_window);
+}
+
+static void __exit ddr_window_exit(void)
+{
+ platform_driver_unregister(&ddr_window);
+}
+
+module_init(ddr_window_init);
+module_exit(ddr_window_exit);
+MODULE_LICENSE("GPL v2");
projects / platform / kernel / linux-amlogic.git / commitdiff