/**
 * Marvell Bluetooth driver: debugfs related functions
 *
 * Copyright (C) 2009, Marvell International Ltd.
 *
 * This software file (the "File") is distributed by Marvell International
 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
 * (the "License").  You may use, redistribute and/or modify this File in
 * accordance with the terms and conditions of the License, a copy of which
 * is available by writing to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
 *
 *
 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
 * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
 * this warranty disclaimer.
 **/

#include <linux/debugfs.h>
#include <linux/slab.h>

#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>

#include "btmrvl_drv.h"

struct btmrvl_debugfs_data {
        struct dentry *config_dir;
        struct dentry *status_dir;

        /* config */
        struct dentry *psmode;
        struct dentry *pscmd;
        struct dentry *hsmode;
        struct dentry *hscmd;
        struct dentry *gpiogap;
        struct dentry *hscfgcmd;

        /* status */
        struct dentry *curpsmode;
        struct dentry *hsstate;
        struct dentry *psstate;
        struct dentry *txdnldready;
};

static int btmrvl_open_generic(struct inode *inode, struct file *file)
{
        file->private_data = inode->i_private;
        return 0;
}

static ssize_t btmrvl_hscfgcmd_write(struct file *file,
                        const char __user *ubuf, size_t count, loff_t *ppos)
{
        struct btmrvl_private *priv = file->private_data;
        char buf[16];
        long result, ret;

        memset(buf, 0, sizeof(buf));

        if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
                return -EFAULT;

        ret = strict_strtol(buf, 10, &result);
        if (ret)
                return ret;

        priv->btmrvl_dev.hscfgcmd = result;

        if (priv->btmrvl_dev.hscfgcmd) {
                btmrvl_prepare_command(priv);
                wake_up_interruptible(&priv->main_thread.wait_q);
        }

        return count;
}

static ssize_t btmrvl_hscfgcmd_read(struct file *file, char __user *userbuf,
                                                size_t count, loff_t *ppos)
{
        struct btmrvl_private *priv = file->private_data;
        char buf[16];
        int ret;

        ret = snprintf(buf, sizeof(buf) - 1, "%d\n",
                                                priv->btmrvl_dev.hscfgcmd);

        return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
}

static const struct file_operations btmrvl_hscfgcmd_fops = {
        .read   = btmrvl_hscfgcmd_read,
        .write  = btmrvl_hscfgcmd_write,
        .open   = btmrvl_open_generic,
        .llseek = default_llseek,
};

static ssize_t btmrvl_psmode_write(struct file *file, const char __user *ubuf,
                                                size_t count, loff_t *ppos)
{
        struct btmrvl_private *priv = file->private_data;
        char buf[16];
        long result, ret;

        memset(buf, 0, sizeof(buf));

        if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
                return -EFAULT;

        ret = strict_strtol(buf, 10, &result);
        if (ret)
                return ret;

        priv->btmrvl_dev.psmode = result;

        return count;
}

static ssize_t btmrvl_psmode_read(struct file *file, char __user *userbuf,
                                                size_t count, loff_t *ppos)
{
        struct btmrvl_private *priv = file->private_data;
        char buf[16];
        int ret;

        ret = snprintf(buf, sizeof(buf) - 1, "%d\n",
                                                priv->btmrvl_dev.psmode);

        return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
}

static const struct file_operations btmrvl_psmode_fops = {
        .read   = btmrvl_psmode_read,
        .write  = btmrvl_psmode_write,
        .open   = btmrvl_open_generic,
        .llseek = default_llseek,
};

static ssize_t btmrvl_pscmd_write(struct file *file, const char __user *ubuf,
                                                size_t count, loff_t *ppos)
{
        struct btmrvl_private *priv = file->private_data;
        char buf[16];
        long result, ret;

        memset(buf, 0, sizeof(buf));

        if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
                return -EFAULT;

        ret = strict_strtol(buf, 10, &result);
        if (ret)
                return ret;

        priv->btmrvl_dev.pscmd = result;

        if (priv->btmrvl_dev.pscmd) {
                btmrvl_prepare_command(priv);
                wake_up_interruptible(&priv->main_thread.wait_q);
        }

        return count;

}

static ssize_t btmrvl_pscmd_read(struct file *file, char __user *userbuf,
                                                size_t count, loff_t *ppos)
{
        struct btmrvl_private *priv = file->private_data;
        char buf[16];
        int ret;

        ret = snprintf(buf, sizeof(buf) - 1, "%d\n", priv->btmrvl_dev.pscmd);

        return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
}

static const struct file_operations btmrvl_pscmd_fops = {
        .read = btmrvl_pscmd_read,
        .write = btmrvl_pscmd_write,
        .open = btmrvl_open_generic,
        .llseek = default_llseek,
};

static ssize_t btmrvl_gpiogap_write(struct file *file, const char __user *ubuf,
                                                size_t count, loff_t *ppos)
{
        struct btmrvl_private *priv = file->private_data;
        char buf[16];
        long result, ret;

        memset(buf, 0, sizeof(buf));

        if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
                return -EFAULT;

        ret = strict_strtol(buf, 16, &result);
        if (ret)
                return ret;

        priv->btmrvl_dev.gpio_gap = result;

        return count;
}

static ssize_t btmrvl_gpiogap_read(struct file *file, char __user *userbuf,
                                                size_t count, loff_t *ppos)
{
        struct btmrvl_private *priv = file->private_data;
        char buf[16];
        int ret;

        ret = snprintf(buf, sizeof(buf) - 1, "0x%x\n",
                                                priv->btmrvl_dev.gpio_gap);

        return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
}

static const struct file_operations btmrvl_gpiogap_fops = {
        .read   = btmrvl_gpiogap_read,
        .write  = btmrvl_gpiogap_write,
        .open   = btmrvl_open_generic,
        .llseek = default_llseek,
};

static ssize_t btmrvl_hscmd_write(struct file *file, const char __user *ubuf,
                                                size_t count, loff_t *ppos)
{
        struct btmrvl_private *priv = file->private_data;
        char buf[16];
        long result, ret;

        memset(buf, 0, sizeof(buf));

        if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
                return -EFAULT;

        ret = strict_strtol(buf, 10, &result);
        if (ret)
                return ret;

        priv->btmrvl_dev.hscmd = result;
        if (priv->btmrvl_dev.hscmd) {
                btmrvl_prepare_command(priv);
                wake_up_interruptible(&priv->main_thread.wait_q);
        }

        return count;
}

static ssize_t btmrvl_hscmd_read(struct file *file, char __user *userbuf,
                                                size_t count, loff_t *ppos)
{
        struct btmrvl_private *priv = file->private_data;
        char buf[16];
        int ret;

        ret = snprintf(buf, sizeof(buf) - 1, "%d\n", priv->btmrvl_dev.hscmd);

        return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
}

static const struct file_operations btmrvl_hscmd_fops = {
        .read   = btmrvl_hscmd_read,
        .write  = btmrvl_hscmd_write,
        .open   = btmrvl_open_generic,
        .llseek = default_llseek,
};

static ssize_t btmrvl_hsmode_write(struct file *file, const char __user *ubuf,
                                                size_t count, loff_t *ppos)
{
        struct btmrvl_private *priv = file->private_data;
        char buf[16];
        long result, ret;

        memset(buf, 0, sizeof(buf));

        if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
                return -EFAULT;

        ret = strict_strtol(buf, 10, &result);
        if (ret)
                return ret;

        priv->btmrvl_dev.hsmode = result;

        return count;
}

static ssize_t btmrvl_hsmode_read(struct file *file, char __user * userbuf,
                                                size_t count, loff_t *ppos)
{
        struct btmrvl_private *priv = file->private_data;
        char buf[16];
        int ret;

        ret = snprintf(buf, sizeof(buf) - 1, "%d\n", priv->btmrvl_dev.hsmode);

        return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
}

static const struct file_operations btmrvl_hsmode_fops = {
        .read   = btmrvl_hsmode_read,
        .write  = btmrvl_hsmode_write,
        .open   = btmrvl_open_generic,
        .llseek = default_llseek,
};

static ssize_t btmrvl_curpsmode_read(struct file *file, char __user *userbuf,
                                                size_t count, loff_t *ppos)
{
        struct btmrvl_private *priv = file->private_data;
        char buf[16];
        int ret;

        ret = snprintf(buf, sizeof(buf) - 1, "%d\n", priv->adapter->psmode);

        return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
}

static const struct file_operations btmrvl_curpsmode_fops = {
        .read   = btmrvl_curpsmode_read,
        .open   = btmrvl_open_generic,
        .llseek = default_llseek,
};

static ssize_t btmrvl_psstate_read(struct file *file, char __user * userbuf,
                                                size_t count, loff_t *ppos)
{
        struct btmrvl_private *priv = file->private_data;
        char buf[16];
        int ret;

        ret = snprintf(buf, sizeof(buf) - 1, "%d\n", priv->adapter->ps_state);

        return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
}

static const struct file_operations btmrvl_psstate_fops = {
        .read   = btmrvl_psstate_read,
        .open   = btmrvl_open_generic,
        .llseek = default_llseek,
};

static ssize_t btmrvl_hsstate_read(struct file *file, char __user *userbuf,
                                                size_t count, loff_t *ppos)
{
        struct btmrvl_private *priv = file->private_data;
        char buf[16];
        int ret;

        ret = snprintf(buf, sizeof(buf) - 1, "%d\n", priv->adapter->hs_state);

        return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
}

static const struct file_operations btmrvl_hsstate_fops = {
        .read   = btmrvl_hsstate_read,
        .open   = btmrvl_open_generic,
        .llseek = default_llseek,
};

static ssize_t btmrvl_txdnldready_read(struct file *file, char __user *userbuf,
                                                size_t count, loff_t *ppos)
{
        struct btmrvl_private *priv = file->private_data;
        char buf[16];
        int ret;

        ret = snprintf(buf, sizeof(buf) - 1, "%d\n",
                                        priv->btmrvl_dev.tx_dnld_rdy);

        return simple_read_from_buffer(userbuf, count, ppos, buf, ret);
}

static const struct file_operations btmrvl_txdnldready_fops = {
        .read   = btmrvl_txdnldready_read,
        .open   = btmrvl_open_generic,
        .llseek = default_llseek,
};

void btmrvl_debugfs_init(struct hci_dev *hdev)
{
        struct btmrvl_private *priv = hdev->driver_data;
        struct btmrvl_debugfs_data *dbg;

        if (!hdev->debugfs)
                return;

        dbg = kzalloc(sizeof(*dbg), GFP_KERNEL);
        priv->debugfs_data = dbg;

        if (!dbg) {
                BT_ERR("Can not allocate memory for btmrvl_debugfs_data.");
                return;
        }

        dbg->config_dir = debugfs_create_dir("config", hdev->debugfs);

        dbg->psmode = debugfs_create_file("psmode", 0644, dbg->config_dir,
                                hdev->driver_data, &btmrvl_psmode_fops);
        dbg->pscmd = debugfs_create_file("pscmd", 0644, dbg->config_dir,
                                hdev->driver_data, &btmrvl_pscmd_fops);
        dbg->gpiogap = debugfs_create_file("gpiogap", 0644, dbg->config_dir,
                                hdev->driver_data, &btmrvl_gpiogap_fops);
        dbg->hsmode =  debugfs_create_file("hsmode", 0644, dbg->config_dir,
                                hdev->driver_data, &btmrvl_hsmode_fops);
        dbg->hscmd = debugfs_create_file("hscmd", 0644, dbg->config_dir,
                                hdev->driver_data, &btmrvl_hscmd_fops);
        dbg->hscfgcmd = debugfs_create_file("hscfgcmd", 0644, dbg->config_dir,
                                hdev->driver_data, &btmrvl_hscfgcmd_fops);

        dbg->status_dir = debugfs_create_dir("status", hdev->debugfs);
        dbg->curpsmode = debugfs_create_file("curpsmode", 0444,
                                                dbg->status_dir,
                                                hdev->driver_data,
                                                &btmrvl_curpsmode_fops);
        dbg->psstate = debugfs_create_file("psstate", 0444, dbg->status_dir,
                                hdev->driver_data, &btmrvl_psstate_fops);
        dbg->hsstate = debugfs_create_file("hsstate", 0444, dbg->status_dir,
                                hdev->driver_data, &btmrvl_hsstate_fops);
        dbg->txdnldready = debugfs_create_file("txdnldready", 0444,
                                                dbg->status_dir,
                                                hdev->driver_data,
                                                &btmrvl_txdnldready_fops);
}

void btmrvl_debugfs_remove(struct hci_dev *hdev)
{
        struct btmrvl_private *priv = hdev->driver_data;
        struct btmrvl_debugfs_data *dbg = priv->debugfs_data;

        if (!dbg)
                return;

        debugfs_remove(dbg->psmode);
        debugfs_remove(dbg->pscmd);
        debugfs_remove(dbg->gpiogap);
        debugfs_remove(dbg->hsmode);
        debugfs_remove(dbg->hscmd);
        debugfs_remove(dbg->hscfgcmd);
        debugfs_remove(dbg->config_dir);

        debugfs_remove(dbg->curpsmode);
        debugfs_remove(dbg->psstate);
        debugfs_remove(dbg->hsstate);
        debugfs_remove(dbg->txdnldready);
        debugfs_remove(dbg->status_dir);

        kfree(dbg);
}