text: /* wma audio output device
   *
   * Copyright (C) 2008 Google, Inc.
   * Copyright (C) 2008 HTC Corporation
   * Copyright (c) 2009-2014, The Linux Foundation. All rights reserved.
   *
   * This software is licensed under the terms of the GNU General Public
   * License version 2, as published by the Free Software Foundation, and
   * may be copied, distributed, and modified under those terms.
   *
   * 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/types.h>
  #include <linux/msm_audio_wma.h>
  #include <linux/compat.h>
  #include "audio_utils_aio.h"
  
  #ifdef CONFIG_DEBUG_FS
  static const struct file_operations audio_wma_debug_fops = {
  	.read = audio_aio_debug_read,
  	.open = audio_aio_debug_open,
  };
  #endif
  
  static long audio_ioctl_shared(struct file *file, unsigned int cmd,
  						void *arg)
  {
  	struct q6audio_aio *audio = file->private_data;
  	int rc = 0;
  
  	switch (cmd) {
  	case AUDIO_START: {
  		struct asm_wma_cfg wma_cfg;
  		struct msm_audio_wma_config_v2 *wma_config;
  		pr_debug("%s[%pK]: AUDIO_START session_id[%d]\n", __func__,
  						audio, audio->ac->session);
  		if (audio->feedback == NON_TUNNEL_MODE) {
  			/* Configure PCM output block */
  			rc = q6asm_enc_cfg_blk_pcm(audio->ac,
  					audio->pcm_cfg.sample_rate,
  					audio->pcm_cfg.channel_count);
  			if (rc < 0) {
  				pr_err("pcm output block config failed\n");
  				break;
  			}
  		}
  		wma_config = (struct msm_audio_wma_config_v2 *)audio->codec_cfg;
  		wma_cfg.format_tag = wma_config->format_tag;
  		wma_cfg.ch_cfg = wma_config->numchannels;
  		wma_cfg.sample_rate =  wma_config->samplingrate;
  		wma_cfg.avg_bytes_per_sec = wma_config->avgbytespersecond;
  		wma_cfg.block_align = wma_config->block_align;
  		wma_cfg.valid_bits_per_sample =
  				wma_config->validbitspersample;
  		wma_cfg.ch_mask =  wma_config->channelmask;
  		wma_cfg.encode_opt = wma_config->encodeopt;
  		/* Configure Media format block */
  		rc = q6asm_media_format_block_wma(audio->ac, &wma_cfg);
  		if (rc < 0) {
  			pr_err("cmd media format block failed\n");
  			break;
  		}
  		rc = audio_aio_enable(audio);
  		audio->eos_rsp = 0;
  		audio->eos_flag = 0;
  		if (!rc) {
  			audio->enabled = 1;
  		} else {
  			audio->enabled = 0;
  			pr_err("Audio Start procedure failed rc=%d\n", rc);
  			break;
  		}
  		pr_debug("AUDIO_START success enable[%d]\n", audio->enabled);
  		if (audio->stopped == 1)
  			audio->stopped = 0;
  		break;
  	}
  	default:
  		pr_err("%s: Unknown ioctl cmd = %d", __func__, cmd);
  		break;
  	}
  	return rc;
  }
  
  static long audio_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
  {
  	struct q6audio_aio *audio = file->private_data;
  	int rc = 0;
  
  	switch (cmd) {
  	case AUDIO_START: {
  		rc = audio_ioctl_shared(file, cmd, (void *)arg);
  		break;
  	}
  	case AUDIO_GET_WMA_CONFIG_V2: {
  		if (copy_to_user((void *)arg, audio->codec_cfg,
  			sizeof(struct msm_audio_wma_config_v2))) {
  			pr_err("%s:copy_to_user for AUDIO_SET_WMA_CONFIG_V2 failed\n",
  				__func__);
  			rc = -EFAULT;
  			break;
  		}
  		break;
  	}
  	case AUDIO_SET_WMA_CONFIG_V2: {
  		if (copy_from_user(audio->codec_cfg, (void *)arg,
  			sizeof(struct msm_audio_wma_config_v2))) {
  			pr_err("%s:copy_from_user for AUDIO_SET_WMA_CONFIG_V2 failed\n",
  				__func__);
  			rc = -EFAULT;
  			break;
  		}
  		break;
  	}
  	default: {
  		pr_debug("%s[%pK]: Calling utils ioctl\n", __func__, audio);
  		rc = audio->codec_ioctl(file, cmd, arg);
  		if (rc)
  			pr_err("Failed in utils_ioctl: %d\n", rc);
  		break;
  	}
  	}
  	return rc;
  }
  
  #ifdef CONFIG_COMPAT
  struct msm_audio_wma_config_v2_32 {
  	u16 format_tag;
  	u16 numchannels;
  	u32 samplingrate;
  	u32 avgbytespersecond;
  	u16 block_align;
  	u16 validbitspersample;
  	u32 channelmask;
  	u16 encodeopt;
  };
  
  enum {
  	AUDIO_GET_WMA_CONFIG_V2_32 =  _IOR(AUDIO_IOCTL_MAGIC,
  	(AUDIO_MAX_COMMON_IOCTL_NUM+2), struct msm_audio_wma_config_v2_32),
  	AUDIO_SET_WMA_CONFIG_V2_32 =  _IOW(AUDIO_IOCTL_MAGIC,
  	(AUDIO_MAX_COMMON_IOCTL_NUM+3), struct msm_audio_wma_config_v2_32)
  };
  
  static long audio_compat_ioctl(struct file *file, unsigned int cmd,
  						unsigned long arg)
  {
  	struct q6audio_aio *audio = file->private_data;
  	int rc = 0;
  
  	switch (cmd) {
  	case AUDIO_START: {
  		rc = audio_ioctl_shared(file, cmd, (void *)arg);
  		break;
  	}
  	case AUDIO_GET_WMA_CONFIG_V2_32: {
  		struct msm_audio_wma_config_v2 *wma_config;
  		struct msm_audio_wma_config_v2_32 wma_config_32;
  
  		memset(&wma_config_32, 0, sizeof(wma_config_32));
  
  		wma_config = (struct msm_audio_wma_config_v2 *)audio->codec_cfg;
  		wma_config_32.format_tag = wma_config->format_tag;
  		wma_config_32.numchannels = wma_config->numchannels;
  		wma_config_32.samplingrate = wma_config->samplingrate;
  		wma_config_32.avgbytespersecond = wma_config->avgbytespersecond;
  		wma_config_32.block_align = wma_config->block_align;
  		wma_config_32.validbitspersample =
  					wma_config->validbitspersample;
  		wma_config_32.channelmask = wma_config->channelmask;
  		wma_config_32.encodeopt = wma_config->encodeopt;
  		if (copy_to_user((void *)arg, &wma_config_32,
  			sizeof(wma_config_32))) {
  			pr_err("%s: copy_to_user for GET_WMA_CONFIG_V2_32 failed\n",
  				 __func__);
  			rc = -EFAULT;
  			break;
  		}
  		break;
  	}
  	case AUDIO_SET_WMA_CONFIG_V2_32: {
  		struct msm_audio_wma_config_v2 *wma_config;
  		struct msm_audio_wma_config_v2_32 wma_config_32;
  
  		if (copy_from_user(&wma_config_32, (void *)arg,
  			sizeof(wma_config_32))) {
  			pr_err("%s: copy_from_user for SET_WMA_CONFIG_V2_32 failed\n"
  				, __func__);
  			rc = -EFAULT;
  			break;
  		}
  		wma_config = (struct msm_audio_wma_config_v2 *)audio->codec_cfg;
  		wma_config->format_tag = wma_config_32.format_tag;
  		wma_config->numchannels = wma_config_32.numchannels;
  		wma_config->samplingrate = wma_config_32.samplingrate;
  		wma_config->avgbytespersecond = wma_config_32.avgbytespersecond;
  		wma_config->block_align = wma_config_32.block_align;
  		wma_config->validbitspersample =
  				wma_config_32.validbitspersample;
  		wma_config->channelmask = wma_config_32.channelmask;
  		wma_config->encodeopt = wma_config_32.encodeopt;
  		break;
  	}
  	default: {
  		pr_debug("%s[%pK]: Calling utils ioctl\n", __func__, audio);
  		rc = audio->codec_compat_ioctl(file, cmd, arg);
  		if (rc)
  			pr_err("Failed in utils_ioctl: %d\n", rc);
  		break;
  	}
  	}
  	return rc;
  }
  #else
  #define audio_compat_ioctl NULL
  #endif
  
  static int audio_open(struct inode *inode, struct file *file)
  {
  	struct q6audio_aio *audio = NULL;
  	int rc = 0;
  
  #ifdef CONFIG_DEBUG_FS
  	/* 4 bytes represents decoder number, 1 byte for terminate string */
  	char name[sizeof "msm_wma_" + 5];
  #endif
  	audio = kzalloc(sizeof(struct q6audio_aio), GFP_KERNEL);
  
  	if (audio == NULL) {
  		pr_err("Could not allocate memory for wma decode driver\n");
  		return -ENOMEM;
  	}
  	audio->codec_cfg = kzalloc(sizeof(struct msm_audio_wma_config_v2),
  					GFP_KERNEL);
  	if (audio->codec_cfg == NULL) {
  		pr_err("%s:Could not allocate memory for wma"
  			"config\n", __func__);
  		kfree(audio);
  		return -ENOMEM;
  	}
  
  	audio->pcm_cfg.buffer_size = PCM_BUFSZ_MIN;
  
  	audio->ac = q6asm_audio_client_alloc((app_cb) q6_audio_cb,
  					     (void *)audio);
  
  	if (!audio->ac) {
  		pr_err("Could not allocate memory for audio client\n");
  		kfree(audio->codec_cfg);
  		kfree(audio);
  		return -ENOMEM;
  	}
  	rc = audio_aio_open(audio, file);
  	if (rc < 0) {
  		pr_err("%s: audio_aio_open rc=%d\n",
  			__func__, rc);
  		goto fail;
  	}
  	/* open in T/NT mode */
  	if ((file->f_mode & FMODE_WRITE) && (file->f_mode & FMODE_READ)) {
  		rc = q6asm_open_read_write(audio->ac, FORMAT_LINEAR_PCM,
  					   FORMAT_WMA_V9);
  		if (rc < 0) {
  			pr_err("NT mode Open failed rc=%d\n", rc);
  			rc = -ENODEV;
  			goto fail;
  		}
  		audio->feedback = NON_TUNNEL_MODE;
  		/* open WMA decoder, expected frames is always 1*/
  		audio->buf_cfg.frames_per_buf = 0x01;
  		audio->buf_cfg.meta_info_enable = 0x01;
  	} else if ((file->f_mode & FMODE_WRITE) &&
  			!(file->f_mode & FMODE_READ)) {
  		rc = q6asm_open_write(audio->ac, FORMAT_WMA_V9);
  		if (rc < 0) {
  			pr_err("T mode Open failed rc=%d\n", rc);
  			rc = -ENODEV;
  			goto fail;
  		}
  		audio->feedback = TUNNEL_MODE;
  		audio->buf_cfg.meta_info_enable = 0x00;
  	} else {
  		pr_err("Not supported mode\n");
  		rc = -EACCES;
  		goto fail;
  	}
  
  #ifdef CONFIG_DEBUG_FS
  	snprintf(name, sizeof name, "msm_wma_%04x", audio->ac->session);
  	audio->dentry = debugfs_create_file(name, S_IFREG | S_IRUGO,
  					    NULL, (void *)audio,
  					    &audio_wma_debug_fops);
  
  	if (IS_ERR(audio->dentry))
  		pr_debug("debugfs_create_file failed\n");
  #endif
  	pr_info("%s:wmadec success mode[%d]session[%d]\n", __func__,
  						audio->feedback,
  						audio->ac->session);
  	return rc;
  fail:
  	q6asm_audio_client_free(audio->ac);
  	kfree(audio->codec_cfg);
  	kfree(audio);
  	return rc;
  }
  
  static const struct file_operations audio_wma_fops = {
  	.owner = THIS_MODULE,
  	.open = audio_open,
  	.release = audio_aio_release,
  	.unlocked_ioctl = audio_ioctl,
  	.fsync = audio_aio_fsync,
  	.compat_ioctl = audio_compat_ioctl
  };
  
  struct miscdevice audio_wma_misc = {
  	.minor = MISC_DYNAMIC_MINOR,
  	.name = "msm_wma",
  	.fops = &audio_wma_fops,
  };
  
  static int __init audio_wma_init(void)
  {
  	return misc_register(&audio_wma_misc);
  }
  
  device_initcall(audio_wma_init);
  