/*
 *  drivers/arisc/arisc.c
 *
 * Copyright (c) 2012 Allwinner.
 * 2012-05-01 Written by sunny (sunny@allwinnertech.com).
 * 2012-10-01 Written by superm (superm@allwinnertech.com).
 *
 * 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/sunxi-sid.h>
#include "arisc_i.h"

#ifdef CONFIG_PM
static unsigned int arisc_debug_baudrate = 115200;
unsigned int arisc_debug_dram_crc_en;
unsigned int arisc_debug_dram_crc_srcaddr = 0x40000000;
unsigned int arisc_debug_dram_crc_len = (1024 * 1024);
unsigned int arisc_debug_dram_crc_error;
unsigned int arisc_debug_dram_crc_total_count;
unsigned int arisc_debug_dram_crc_error_count;
unsigned int arisc_debug_level = 2;

static ssize_t debug_mask_show(struct kobject *kobj,
		struct kobj_attribute *attr, char *buf)
{
	ssize_t size = 0;

	size = sprintf(buf, "%u\n", arisc_debug_level);

	return size;
}

static ssize_t debug_mask_store(struct kobject *dev,
		struct kobj_attribute *attr, const char *buf, size_t size)
{
	u32 value = 0;

	sscanf(buf, "%u", &value);
	if ((value < 0) || (value > 3)) {
		pr_warn("invalid arisc debug mask [%d] to set\n", value);
		return size;
	}

	arisc_debug_level = value;
	arisc_set_debug_level(arisc_debug_level);
	pr_info("debug_mask change to %d\n", arisc_debug_level);

	return size;
}

static ssize_t debug_baudrate_show(struct kobject *kobj,
		struct kobj_attribute *attr, char *buf)
{
	ssize_t size = 0;

	size = sprintf(buf, "%u\n", arisc_debug_baudrate);

	return size;
}

static ssize_t debug_baudrate_store(struct kobject *dev,
		struct kobj_attribute *attr, const char *buf, size_t size)
{
	u32 value = 0;

	sscanf(buf, "%u", &value);
	if ((value != 115200) && (value != 57600) && (value != 9600)) {
		pr_warn("invalid arisc uart baudrate [%d] to set\n", value);
		return size;
	}

	arisc_debug_baudrate = value;
	arisc_set_uart_baudrate(arisc_debug_baudrate);
	pr_info("debug_baudrate change to %d\n", arisc_debug_baudrate);

	return size;
}
static u32 time_to_wakeup_ms;

static ssize_t time_to_wakeup_ms_show(struct kobject *kobj,
		struct kobj_attribute *attr, char *buf)
{
	ssize_t size = 0;

	size = sprintf(buf, "%u\n", time_to_wakeup_ms);

	return size;
}

static ssize_t time_to_wakeup_ms_store(struct kobject *dev,
		struct kobj_attribute *attr, const char *buf, size_t size)
{
	u32 value = 0;

	sscanf(buf, "%u", &value);

	time_to_wakeup_ms = value;
	arisc_set_wakeup_source(SET_WAKEUP_TIME_MS(time_to_wakeup_ms));
	pr_info("debug_baudrate change to %d\n", arisc_debug_baudrate);

	return size;
}

static ssize_t dram_crc_paras_show(struct kobject *kobj,
		struct kobj_attribute *attr, char *buf)
{
	ssize_t size = 0;

	size = sprintf(buf, "enable:0x%x srcaddr:0x%x lenght:0x%x\n", arisc_debug_dram_crc_en,
			arisc_debug_dram_crc_srcaddr, arisc_debug_dram_crc_len);

	return size;
}

static ssize_t dram_crc_paras_store(struct kobject *dev,
		struct kobj_attribute *attr, const char *buf, size_t size)
{
	u32 dram_crc_en      = 0;
	u32 dram_crc_srcaddr = 0;
	u32 dram_crc_len     = 0;

	sscanf(buf, "%x %x %x\n", &dram_crc_en, &dram_crc_srcaddr, &dram_crc_len);

	if ((dram_crc_en != 0) && (dram_crc_en != 1)) {
		pr_warn("invalid arisc debug dram crc paras [%x] [%x] [%x] to set\n",
			dram_crc_en, dram_crc_srcaddr, dram_crc_len);

		return size;
	}

	arisc_debug_dram_crc_en = dram_crc_en;
	arisc_debug_dram_crc_srcaddr = dram_crc_srcaddr;
	arisc_debug_dram_crc_len = dram_crc_len;
	arisc_set_dram_crc_paras(arisc_debug_dram_crc_en,
				 arisc_debug_dram_crc_srcaddr,
				 arisc_debug_dram_crc_len);
	pr_info("dram_crc_en=0x%x, dram_crc_srcaddr=0x%x, dram_crc_len=0x%x\n",
		arisc_debug_dram_crc_en, arisc_debug_dram_crc_srcaddr, arisc_debug_dram_crc_len);

	return size;
}

static ssize_t dram_crc_result_show(struct kobject *kobj,
		struct kobj_attribute *attr, char *buf)
{
	arisc_query_dram_crc_result((unsigned long *)&arisc_debug_dram_crc_error,
				    (unsigned long *)&arisc_debug_dram_crc_total_count,
				    (unsigned long *)&arisc_debug_dram_crc_error_count);
	return sprintf(buf, "dram info:\n" \
			"  enable %u\n" \
			"  error %u\n" \
			"  total count %u\n" \
			"  error count %u\n" \
			"  src:%x\n" \
			"  len:0x%x\n", \
			arisc_debug_dram_crc_en,
			arisc_debug_dram_crc_error,
			arisc_debug_dram_crc_total_count,
			arisc_debug_dram_crc_error_count,
			arisc_debug_dram_crc_srcaddr,
			arisc_debug_dram_crc_len);
}

static ssize_t dram_crc_result_store(struct kobject *dev,
		struct kobj_attribute *attr, const char *buf, size_t size)
{
	u32 error = 0;
	u32 total_count = 0;
	u32 error_count = 0;

	sscanf(buf, "%u %u %u", &error, &total_count, &error_count);
	if ((error != 0) && (error != 1)) {
		pr_warn("invalid arisc dram crc result [%d] [%d] [%d] to set\n",
				error, total_count, error_count);
		return size;
	}

	arisc_debug_dram_crc_error = error;
	arisc_debug_dram_crc_total_count = total_count;
	arisc_debug_dram_crc_error_count = error_count;
	arisc_set_dram_crc_result((unsigned long)arisc_debug_dram_crc_error,
				(unsigned long)arisc_debug_dram_crc_total_count,
				(unsigned long)arisc_debug_dram_crc_error_count);
	pr_info("debug_dram_crc_result change to error:%u total count:%u error count:%u\n",
			arisc_debug_dram_crc_error,
			arisc_debug_dram_crc_total_count,
			arisc_debug_dram_crc_error_count);

	return size;
}

#define SUNXI_DEBUG_FILE(_name)					\
static struct kobj_attribute _name##_attr =			\
	__ATTR(_name, 0644, _name##_show, _name##_store)

SUNXI_DEBUG_FILE(debug_mask);
SUNXI_DEBUG_FILE(debug_baudrate);
SUNXI_DEBUG_FILE(time_to_wakeup_ms);
SUNXI_DEBUG_FILE(dram_crc_paras);
SUNXI_DEBUG_FILE(dram_crc_result);

static struct attribute *sunxi_debug_attrs[] = {
	&debug_mask_attr.attr,
	&debug_baudrate_attr.attr,
	&time_to_wakeup_ms_attr.attr,
	&dram_crc_paras_attr.attr,
	&dram_crc_result_attr.attr,
	NULL
};

static struct attribute_group sunxi_debug_group = {
	.attrs = sunxi_debug_attrs,
};

static int __init arisc_init(void)
{
	struct kobject *apm_kobj;
	int rc;

	pr_info("sunxi-pm debug v%s\n", DRV_VERSION);

	apm_kobj = kobject_create_and_add("sunxi_debug", power_kobj);
	if (!apm_kobj)
		return -ENOMEM;

	rc = sysfs_create_group(apm_kobj, &sunxi_debug_group);
	if (rc)
		kobject_put(apm_kobj);

	return rc;
}
#else
static int __init arisc_init(void)
{
	return 0;
}
#endif	/* CONFIG_PM */

subsys_initcall(arisc_init);

MODULE_DESCRIPTION("SUNXI POWER MANAGEMENT");
MODULE_AUTHOR("Superm Wu <superm@allwinnertech.com>");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);