text: /* Copyright (c) 2010-2014,2016, The Linux Foundation. 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 version 2 and
   * only version 2 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.
   *
  */
  
  #include <linux/module.h>
  #include <linux/fs.h>
  #include <linux/miscdevice.h>
  #include <linux/uaccess.h>
  #include <linux/sched.h>
  #include <linux/wait.h>
  #include <linux/dma-mapping.h>
  #include <linux/slab.h>
  #include <linux/msm_audio_qcp.h>
  #include <linux/atomic.h>
  #include <linux/compat.h>
  #include <asm/ioctls.h>
  #include "audio_utils.h"
  
  /* Buffer with meta*/
  #define PCM_BUF_SIZE		(4096 + sizeof(struct meta_in))
  
  /* Maximum 10 frames in buffer with meta */
  #define FRAME_SIZE		(1 + ((35+sizeof(struct meta_out_dsp)) * 10))
  
  static long qcelp_in_ioctl_shared(struct file *file,
  				unsigned int cmd, unsigned long arg)
  {
  	struct q6audio_in  *audio = file->private_data;
  	int rc = 0;
  	int cnt = 0;
  
  	switch (cmd) {
  	case AUDIO_START: {
  		struct msm_audio_qcelp_enc_config *enc_cfg;
  		enc_cfg = audio->enc_cfg;
  		pr_debug("%s:session id %d: default buf alloc[%d]\n", __func__,
  				audio->ac->session, audio->buf_alloc);
  		if (audio->enabled == 1) {
  			pr_info("%s:AUDIO_START already over\n", __func__);
  			rc = 0;
  			break;
  		}
  		rc = audio_in_buf_alloc(audio);
  		if (rc < 0) {
  			pr_err("%s:session id %d: buffer allocation failed\n",
  				__func__, audio->ac->session);
  			break;
  		}
  
  		/* reduced_rate_level, rate_modulation_cmd set to zero
  			 currently not configurable from user space */
  		rc = q6asm_enc_cfg_blk_qcelp(audio->ac,
  			audio->buf_cfg.frames_per_buf,
  			enc_cfg->min_bit_rate,
  			enc_cfg->max_bit_rate, 0, 0);
  
  		if (rc < 0) {
  			pr_err("%s:session id %d: cmd qcelp media format block failed\n",
  					__func__, audio->ac->session);
  			break;
  		}
  		if (audio->feedback == NON_TUNNEL_MODE) {
  			rc = q6asm_media_format_block_pcm(audio->ac,
  				audio->pcm_cfg.sample_rate,
  				audio->pcm_cfg.channel_count);
  
  			if (rc < 0) {
  				pr_err("%s:session id %d: media format block failed\n",
  					__func__, audio->ac->session);
  				break;
  			}
  		}
  		pr_debug("%s:session id %d: AUDIO_START enable[%d]\n", __func__,
  				audio->ac->session, audio->enabled);
  		rc = audio_in_enable(audio);
  		if (!rc) {
  			audio->enabled = 1;
  		} else {
  			audio->enabled = 0;
  			pr_err("%s:session id %d: Audio Start procedure failed rc=%d\n",
  					__func__, audio->ac->session, rc);
  			break;
  		}
  		while (cnt++ < audio->str_cfg.buffer_count)
  			q6asm_read(audio->ac); /* Push buffer to DSP */
  		rc = 0;
  		pr_debug("%s:session id %d: AUDIO_START success enable[%d]\n",
  				__func__, audio->ac->session, audio->enabled);
  		break;
  	}
  	case AUDIO_STOP: {
  		pr_debug("%s:session id %d: AUDIO_STOP\n", __func__,
  				audio->ac->session);
  		rc = audio_in_disable(audio);
  		if (rc  < 0) {
  			pr_err("%s:session id %d: Audio Stop procedure failed rc=%d\n",
  				__func__, audio->ac->session,
  					rc);
  			break;
  		}
  		break;
  	}
  	case AUDIO_SET_QCELP_ENC_CONFIG: {
  		struct msm_audio_qcelp_enc_config *cfg;
  		struct msm_audio_qcelp_enc_config *enc_cfg;
  		enc_cfg = audio->enc_cfg;
  
  		cfg = (struct msm_audio_qcelp_enc_config *)arg;
  		if (cfg == NULL) {
  			pr_err("%s: NULL config pointer\n", __func__);
  			rc = -EINVAL;
  			break;
  		}
  		if (cfg->min_bit_rate > 4 ||
  			 cfg->min_bit_rate < 1) {
  			pr_err("%s:session id %d: invalid min bitrate\n",
  					__func__, audio->ac->session);
  			rc = -EINVAL;
  			break;
  		}
  		if (cfg->max_bit_rate > 4 ||
  			 cfg->max_bit_rate < 1) {
  			pr_err("%s:session id %d: invalid max bitrate\n",
  					__func__, audio->ac->session);
  			rc = -EINVAL;
  			break;
  		}
  		enc_cfg->cdma_rate = cfg->cdma_rate;
  		enc_cfg->min_bit_rate = cfg->min_bit_rate;
  		enc_cfg->max_bit_rate = cfg->max_bit_rate;
  		pr_debug("%s:session id %d: min_bit_rate= 0x%x max_bit_rate=0x%x\n",
  			__func__,
  			audio->ac->session, enc_cfg->min_bit_rate,
  			enc_cfg->max_bit_rate);
  		break;
  	}
  	default:
  		pr_err("%s: Unknown ioctl cmd = %d", __func__, cmd);
  		rc = -EINVAL;
  	}
  	return rc;
  }
  
  static long qcelp_in_ioctl(struct file *file,
  				unsigned int cmd, unsigned long arg)
  {
  	struct q6audio_in  *audio = file->private_data;
  	int rc = 0;
  
  	switch (cmd) {
  	case AUDIO_START:
  	case AUDIO_STOP: {
  		rc = qcelp_in_ioctl_shared(file, cmd, arg);
  		break;
  	}
  	case AUDIO_GET_QCELP_ENC_CONFIG: {
  		if (copy_to_user((void *)arg, audio->enc_cfg,
  			sizeof(struct msm_audio_qcelp_enc_config))) {
  			pr_err(
  				"%s: copy_to_user for AUDIO_GET_QCELP_ENC_CONFIG failed",
  				__func__);
  			rc = -EFAULT;
  		}
  		break;
  	}
  	case AUDIO_SET_QCELP_ENC_CONFIG: {
  		struct msm_audio_qcelp_enc_config cfg;
  		if (copy_from_user(&cfg, (void *) arg,
  				sizeof(cfg))) {
  			pr_err(
  				"%s: copy_from_user for AUDIO_SET_QCELP_ENC_CONFIG failed",
  				__func__);
  			rc = -EFAULT;
  			break;
  		}
  		rc = qcelp_in_ioctl_shared(file, cmd, (unsigned long)&cfg);
  		if (rc)
  			pr_err("%s:AUDIO_SET_QCELP_ENC_CONFIG failed. Rc= %d\n",
  				__func__, rc);
  		break;
  	}
  	default:
  		pr_err("%s: Unknown ioctl cmd = %d", __func__, cmd);
  		rc = -EINVAL;
  	}
  	return rc;
  }
  
  #ifdef CONFIG_COMPAT
  struct msm_audio_qcelp_enc_config32 {
  	u32 cdma_rate;
  	u32 min_bit_rate;
  	u32 max_bit_rate;
  };
  
  enum {
  	AUDIO_SET_QCELP_ENC_CONFIG_32 = _IOW(AUDIO_IOCTL_MAGIC,
  		0, struct msm_audio_qcelp_enc_config32),
  	AUDIO_GET_QCELP_ENC_CONFIG_32 = _IOR(AUDIO_IOCTL_MAGIC,
  		1, struct msm_audio_qcelp_enc_config32)
  };
  
  static long qcelp_in_compat_ioctl(struct file *file,
  				unsigned int cmd, unsigned long arg)
  {
  	struct q6audio_in  *audio = file->private_data;
  	int rc = 0;
  
  	switch (cmd) {
  	case AUDIO_START:
  	case AUDIO_STOP: {
  		rc = qcelp_in_ioctl_shared(file, cmd, arg);
  		break;
  	}
  	case AUDIO_GET_QCELP_ENC_CONFIG_32: {
  		struct msm_audio_qcelp_enc_config32 cfg_32;
  		struct msm_audio_qcelp_enc_config *enc_cfg;
  
  		memset(&cfg_32, 0, sizeof(cfg_32));
  
  		enc_cfg = (struct msm_audio_qcelp_enc_config *)audio->enc_cfg;
  		cfg_32.cdma_rate = enc_cfg->cdma_rate;
  		cfg_32.min_bit_rate = enc_cfg->min_bit_rate;
  		cfg_32.max_bit_rate = enc_cfg->max_bit_rate;
  		if (copy_to_user((void *)arg, &cfg_32,
  			sizeof(cfg_32))) {
  			pr_err("%s: copy_to_user for AUDIO_GET_QCELP_ENC_CONFIG_32 failed\n",
  				__func__);
  			rc = -EFAULT;
  }
  		break;
  	}
  	case AUDIO_SET_QCELP_ENC_CONFIG_32: {
  		struct msm_audio_qcelp_enc_config32 cfg_32;
  		struct msm_audio_qcelp_enc_config cfg;
  		if (copy_from_user(&cfg_32, (void *) arg,
  				sizeof(cfg_32))) {
  			pr_err("%s: copy_from_user for AUDIO_SET_QCELP_ENC_CONFIG_32 failed\n",
  				__func__);
  			rc = -EFAULT;
  			break;
  		}
  		cfg.cdma_rate = cfg_32.cdma_rate;
  		cfg.min_bit_rate = cfg_32.min_bit_rate;
  		cfg.max_bit_rate = cfg_32.max_bit_rate;
  		cmd = AUDIO_SET_QCELP_ENC_CONFIG;
  		rc = qcelp_in_ioctl_shared(file, cmd, (unsigned long)&cfg);
  		if (rc)
  			pr_err("%s:AUDIO_SET_QCELP_ENC_CONFIG failed. rc= %d\n",
  				__func__, rc);
  		break;
  	}
  	default:
  		pr_err("%s: Unknown ioctl cmd = %d", __func__, cmd);
  		rc = -EINVAL;
  	}
  	return rc;
  }
  #else
  #define qcelp_in_compat_ioctl NULL
  #endif
  
  static int qcelp_in_open(struct inode *inode, struct file *file)
  {
  	struct q6audio_in *audio = NULL;
  	struct msm_audio_qcelp_enc_config *enc_cfg;
  	int rc = 0;
  
  	audio = kzalloc(sizeof(struct q6audio_in), GFP_KERNEL);
  
  	if (audio == NULL) {
  		pr_err("%s: Could not allocate memory for qcelp driver\n",
  				__func__);
  		return -ENOMEM;
  	}
  	/* Allocate memory for encoder config param */
  	audio->enc_cfg = kzalloc(sizeof(struct msm_audio_qcelp_enc_config),
  				GFP_KERNEL);
  	if (audio->enc_cfg == NULL) {
  		pr_err("%s:session id %d: Could not allocate memory for aac config param\n",
  				__func__, audio->ac->session);
  		kfree(audio);
  		return -ENOMEM;
  	}
  	enc_cfg = audio->enc_cfg;
  
  	mutex_init(&audio->lock);
  	mutex_init(&audio->read_lock);
  	mutex_init(&audio->write_lock);
  	spin_lock_init(&audio->dsp_lock);
  	init_waitqueue_head(&audio->read_wait);
  	init_waitqueue_head(&audio->write_wait);
  
  	/* Settings will be re-config at AUDIO_SET_CONFIG,
  	* but at least we need to have initial config
  	*/
  	audio->str_cfg.buffer_size = FRAME_SIZE;
  	audio->str_cfg.buffer_count = FRAME_NUM;
  	audio->min_frame_size = 35;
  	audio->max_frames_per_buf = 10;
  	audio->pcm_cfg.buffer_size = PCM_BUF_SIZE;
  	audio->pcm_cfg.buffer_count = PCM_BUF_COUNT;
  	enc_cfg->min_bit_rate = 4;
  	enc_cfg->max_bit_rate = 4;
  	audio->pcm_cfg.channel_count = 1;
  	audio->pcm_cfg.sample_rate = 8000;
  	audio->buf_cfg.meta_info_enable = 0x01;
  	audio->buf_cfg.frames_per_buf = 0x01;
  	audio->event_abort = 0;
  
  	audio->ac = q6asm_audio_client_alloc((app_cb)q6asm_in_cb,
  				(void *)audio);
  
  	if (!audio->ac) {
  		pr_err("%s: Could not allocate memory for audio client\n",
  				__func__);
  		kfree(audio->enc_cfg);
  		kfree(audio);
  		return -ENOMEM;
  	}
  
  	/* open qcelp encoder in T/NT mode */
  	if ((file->f_mode & FMODE_WRITE) &&
  		(file->f_mode & FMODE_READ)) {
  		audio->feedback = NON_TUNNEL_MODE;
  		rc = q6asm_open_read_write(audio->ac, FORMAT_V13K,
  					FORMAT_LINEAR_PCM);
  		if (rc < 0) {
  			pr_err("%s:session id %d: NT mode Open failed rc=%d\n",
  				__func__, audio->ac->session, rc);
  			rc = -ENODEV;
  			goto fail;
  		}
  		pr_info("%s:session id %d: NT mode encoder success\n", __func__,
  				audio->ac->session);
  	} else if (!(file->f_mode & FMODE_WRITE) &&
  				(file->f_mode & FMODE_READ)) {
  		audio->feedback = TUNNEL_MODE;
  		rc = q6asm_open_read(audio->ac, FORMAT_V13K);
  		if (rc < 0) {
  			pr_err("%s:session id %d: T mode Open failed rc=%d\n",
  				__func__, audio->ac->session, rc);
  			rc = -ENODEV;
  			goto fail;
  		}
  		/* register for tx overflow (valid for tunnel mode only) */
  		rc = q6asm_reg_tx_overflow(audio->ac, 0x01);
  		if (rc < 0) {
  			pr_err("%s:session id %d: TX Overflow registration failed rc=%d\n",
  				__func__, audio->ac->session, rc);
  			rc = -ENODEV;
  			goto fail;
  		}
  		pr_info("%s:session id %d: T mode encoder success\n", __func__,
  				audio->ac->session);
  	} else {
  		pr_err("%s:session id %d: Unexpected mode\n", __func__,
  				audio->ac->session);
  		rc = -EACCES;
  		goto fail;
  	}
  
  	audio->opened = 1;
  	atomic_set(&audio->in_count, PCM_BUF_COUNT);
  	atomic_set(&audio->out_count, 0x00);
  	audio->enc_compat_ioctl = qcelp_in_compat_ioctl;
  	audio->enc_ioctl = qcelp_in_ioctl;
  	file->private_data = audio;
  
  	pr_info("%s:session id %d: success\n", __func__, audio->ac->session);
  	return 0;
  fail:
  	q6asm_audio_client_free(audio->ac);
  	kfree(audio->enc_cfg);
  	kfree(audio);
  	return rc;
  }
  
  static const struct file_operations audio_in_fops = {
  	.owner		= THIS_MODULE,
  	.open		= qcelp_in_open,
  	.release	= audio_in_release,
  	.read		= audio_in_read,
  	.write		= audio_in_write,
  	.unlocked_ioctl	= audio_in_ioctl,
  	.compat_ioctl   = audio_in_compat_ioctl
  };
  
  struct miscdevice audio_qcelp_in_misc = {
  	.minor	= MISC_DYNAMIC_MINOR,
  	.name	= "msm_qcelp_in",
  	.fops	= &audio_in_fops,
  };
  
  static int __init qcelp_in_init(void)
  {
  	return misc_register(&audio_qcelp_in_misc);
  }
  
  device_initcall(qcelp_in_init);
  