#include <linux/kernel.h>
#include <linux/kobject.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/sysfs.h>

static struct kset *netease_keyset = NULL;
static struct kobject cpld_ko;
extern int cx20810_set_mode(int mode, int index);
extern void netease_cpld_reset(void);
extern void netease_adau1761_init(void);

enum {
    CX20810_NORMAL_MODE = 0,
    CX20810_NORMAL_MODE_SIMPLE,
    CX20810_NIRMAL_MODE_CODEC3,
    CX20810_NIRMAL_MODE_CODEC3_SIMPLE,
    CX20810_96K_16BIT_MODE,
    CX20810_48K_16BIT_MODE,
};

static ssize_t gen_attr_show(struct kobject *kobj, struct attribute *attr,
                             char *buf) {
    int count = 0;
    count += sprintf(buf, "Cpld init help:\n");
    count += sprintf(buf + count, "adc rst and config:echo 1 > cpld_init\n");
    count += sprintf(buf + count, "adc rst:echo 2 > cpld_init\n");
    count += sprintf(buf + count, "adc config:echo 3 > cpld_init\n");
    count += sprintf(buf + count, "adau1761 init:echo 4 > cpld_init\n");

    return count;
}

static ssize_t gen_attr_store(struct kobject *kobj, struct attribute *attr,
                              const char *buf, size_t count) {
    long ret = -1;
    kstrtol(buf, 10, &ret);

    switch (ret) {
    case 1:
        printk("Adc rst and config\n");
        netease_cpld_reset();
        cx20810_set_mode(CX20810_NORMAL_MODE, 0);
        cx20810_set_mode(CX20810_NORMAL_MODE, 1);
        break;
        
    case 2:
        printk("Adc rst\n");
        netease_cpld_reset();
        break;

    case 3:
        printk("Adc config\n");
        cx20810_set_mode(CX20810_NORMAL_MODE, 0);
        cx20810_set_mode(CX20810_NORMAL_MODE, 1);
        break;

    case 4:
        printk("Init adau1761!\n");
        netease_adau1761_init();
        break;

    default:
        printk("Can not read your input cmd, need help? type cat cpld_init.");
    }

    printk("Do finish, Get ret:%d, count:%d, input:%s\n", ret, count, buf);
    // tipa_set_vol(2 * (24-i));
    return count;
}

static const struct sysfs_ops cpld_ktype_ops = {
    .show = gen_attr_show,
    .store = gen_attr_store,
};
struct attribute cpld_init_set = {
    .name = "cpld_init",
    .mode = S_IRWXUGO,
};
struct attribute *cpld_attr_group[] = {&cpld_init_set, NULL};

void cpld_release(struct kobject *kobj) {
    printk("wzj:release %d\n", kobj->name);
}

static struct kobj_type cpld_ko_ktype = {
    .sysfs_ops = &cpld_ktype_ops,
    .default_attrs = cpld_attr_group,
    .release = cpld_release,
};

static int __init netease_config_init(void) {
    printk("Begin to start netease config!\n");
    netease_keyset = kset_create_and_add("netease", NULL, NULL);

    cpld_ko.kset = netease_keyset;
    kobject_init_and_add(&cpld_ko, &cpld_ko_ktype, NULL, "cpld_control");

    return 0;
}

module_init(netease_config_init);

static void __exit netease_config_exit(void) {}
module_exit(netease_config_exit);

/* Module information */
MODULE_AUTHOR("Wang zijiao");
MODULE_DESCRIPTION("Netease config!");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:netease_config");