Duy Truong | 790f06d | 2013-02-13 16:38:12 -0800 | [diff] [blame] | 1 | /* Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. |
Bryan Huntsman | 3f2bc4d | 2011-08-16 17:27:22 -0700 | [diff] [blame] | 2 | * |
| 3 | * Based on the mp3 native driver in arch/arm/mach-msm/qdsp5v2/audio_mp3.c |
| 4 | * |
| 5 | * Copyright (C) 2008 Google, Inc. |
| 6 | * Copyright (C) 2008 HTC Corporation |
| 7 | * |
| 8 | * All source code in this file is licensed under the following license except |
| 9 | * where indicated. |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify it |
| 12 | * under the terms of the GNU General Public License version 2 as published |
| 13 | * by the Free Software Foundation. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| 18 | * |
| 19 | * See the GNU General Public License for more details. |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with this program; if not, you can find it at http://www.fsf.org |
| 22 | */ |
| 23 | |
| 24 | #include <linux/module.h> |
| 25 | #include <linux/fs.h> |
| 26 | #include <linux/miscdevice.h> |
| 27 | #include <linux/uaccess.h> |
| 28 | #include <linux/clk.h> |
| 29 | #include <linux/kthread.h> |
| 30 | #include <linux/wait.h> |
| 31 | #include <linux/dma-mapping.h> |
| 32 | #include <linux/delay.h> |
| 33 | #include <linux/android_pmem.h> |
| 34 | #include <linux/msm_audio.h> |
| 35 | #include <asm/atomic.h> |
| 36 | #include <asm/ioctls.h> |
| 37 | #include <mach/msm_adsp.h> |
| 38 | #include <mach/qdsp6v2/audio_dev_ctl.h> |
| 39 | #include <sound/q6afe.h> |
| 40 | |
| 41 | #define SESSION_ID_FM (MAX_SESSIONS + 1) |
| 42 | #define FM_ENABLE 0x1 |
| 43 | #define FM_DISABLE 0x0 |
| 44 | #define FM_COPP 0x7 |
| 45 | |
| 46 | struct audio { |
| 47 | struct mutex lock; |
| 48 | |
| 49 | int opened; |
| 50 | int enabled; |
| 51 | int running; |
| 52 | |
| 53 | uint16_t fm_source; |
| 54 | uint16_t fm_src_copp_id; |
| 55 | uint16_t fm_dest; |
| 56 | uint16_t fm_dst_copp_id; |
| 57 | uint16_t dec_id; |
| 58 | uint32_t device_events; |
| 59 | uint16_t volume; |
| 60 | }; |
| 61 | |
| 62 | |
| 63 | static struct audio fm_audio; |
| 64 | static int fm_audio_enable(struct audio *audio) |
| 65 | { |
| 66 | if (audio->enabled) |
| 67 | return 0; |
| 68 | |
| 69 | pr_info("%s: fm dest= %08x fm_source = %08x\n", __func__, |
| 70 | audio->fm_dst_copp_id, audio->fm_src_copp_id); |
| 71 | |
| 72 | /* do afe loopback here */ |
| 73 | |
| 74 | if (audio->fm_dest && audio->fm_source) { |
| 75 | if (afe_loopback(FM_ENABLE, audio->fm_dst_copp_id, |
| 76 | audio->fm_src_copp_id) < 0) { |
| 77 | pr_err("%s: afe_loopback failed\n", __func__); |
| 78 | } |
| 79 | |
| 80 | audio->running = 1; |
| 81 | } |
| 82 | |
| 83 | audio->enabled = 1; |
| 84 | return 0; |
| 85 | } |
| 86 | |
| 87 | static void fm_audio_listner(u32 evt_id, union auddev_evt_data *evt_payload, |
| 88 | void *private_data) |
| 89 | { |
| 90 | struct audio *audio = (struct audio *) private_data; |
| 91 | switch (evt_id) { |
| 92 | case AUDDEV_EVT_DEV_RDY: |
| 93 | pr_info("%s :AUDDEV_EVT_DEV_RDY\n", __func__); |
| 94 | if (evt_payload->routing_id == FM_COPP) { |
| 95 | audio->fm_source = 1; |
| 96 | audio->fm_src_copp_id = FM_COPP; |
| 97 | } else { |
| 98 | audio->fm_dest = 1; |
| 99 | audio->fm_dst_copp_id = evt_payload->routing_id; |
| 100 | } |
| 101 | |
| 102 | if (audio->enabled && |
| 103 | audio->fm_dest && |
| 104 | audio->fm_source) { |
| 105 | |
| 106 | afe_loopback_gain(audio->fm_src_copp_id, |
| 107 | audio->volume); |
| 108 | afe_loopback(FM_ENABLE, audio->fm_dst_copp_id, |
| 109 | audio->fm_src_copp_id); |
| 110 | audio->running = 1; |
| 111 | } |
| 112 | break; |
| 113 | case AUDDEV_EVT_DEV_RLS: |
| 114 | pr_info("%s: AUDDEV_EVT_DEV_RLS\n", __func__); |
| 115 | if (evt_payload->routing_id == audio->fm_src_copp_id) |
| 116 | audio->fm_source = 0; |
| 117 | else |
| 118 | audio->fm_dest = 0; |
| 119 | if (audio->running |
| 120 | && (!audio->fm_dest || !audio->fm_source)) { |
| 121 | afe_loopback(FM_DISABLE, audio->fm_dst_copp_id, |
| 122 | audio->fm_src_copp_id); |
| 123 | audio->running = 0; |
| 124 | } else { |
| 125 | pr_err("%s: device switch happened\n", __func__); |
| 126 | } |
| 127 | break; |
| 128 | case AUDDEV_EVT_STREAM_VOL_CHG: |
| 129 | pr_debug("%s: AUDDEV_EVT_STREAM_VOL_CHG\n", __func__); |
| 130 | if (audio->fm_source) { |
| 131 | audio->volume = evt_payload->session_vol; |
| 132 | afe_loopback_gain(audio->fm_src_copp_id, |
| 133 | audio->volume); |
| 134 | } |
| 135 | break; |
| 136 | |
| 137 | default: |
| 138 | pr_err("%s: ERROR:wrong event %08x\n", __func__, evt_id); |
| 139 | break; |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | static int fm_audio_disable(struct audio *audio) |
| 144 | { |
| 145 | |
| 146 | /* break the AFE loopback here */ |
| 147 | afe_loopback(FM_DISABLE, audio->fm_dst_copp_id, audio->fm_src_copp_id); |
| 148 | return 0; |
| 149 | } |
| 150 | |
| 151 | static long fm_audio_ioctl(struct file *file, unsigned int cmd, |
| 152 | unsigned long arg) |
| 153 | { |
| 154 | struct audio *audio = file->private_data; |
| 155 | int rc = -EINVAL; |
| 156 | |
| 157 | |
| 158 | mutex_lock(&audio->lock); |
| 159 | switch (cmd) { |
| 160 | case AUDIO_START: |
| 161 | pr_info("%s: AUDIO_START\n", __func__); |
| 162 | rc = fm_audio_enable(audio); |
| 163 | break; |
| 164 | case AUDIO_STOP: |
| 165 | pr_info("%s: AUDIO_STOP\n", __func__); |
| 166 | rc = fm_audio_disable(audio); |
| 167 | audio->running = 0; |
| 168 | audio->enabled = 0; |
| 169 | break; |
| 170 | case AUDIO_GET_SESSION_ID: |
| 171 | if (copy_to_user((void *) arg, &audio->dec_id, |
| 172 | sizeof(unsigned short))) |
| 173 | rc = -EFAULT; |
| 174 | else |
| 175 | rc = 0; |
| 176 | break; |
| 177 | default: |
| 178 | rc = -EINVAL; |
| 179 | pr_err("%s: Un supported IOCTL\n", __func__); |
| 180 | } |
| 181 | mutex_unlock(&audio->lock); |
| 182 | return rc; |
| 183 | } |
| 184 | |
| 185 | static int fm_audio_release(struct inode *inode, struct file *file) |
| 186 | { |
| 187 | struct audio *audio = file->private_data; |
| 188 | |
| 189 | pr_debug("audio instance 0x%08x freeing\n", (int)audio); |
| 190 | mutex_lock(&audio->lock); |
| 191 | auddev_unregister_evt_listner(AUDDEV_CLNT_DEC, audio->dec_id); |
| 192 | fm_audio_disable(audio); |
| 193 | audio->running = 0; |
| 194 | audio->enabled = 0; |
| 195 | audio->opened = 0; |
| 196 | mutex_unlock(&audio->lock); |
| 197 | return 0; |
| 198 | } |
| 199 | |
| 200 | static int fm_audio_open(struct inode *inode, struct file *file) |
| 201 | { |
| 202 | struct audio *audio = &fm_audio; |
| 203 | int rc = 0; |
| 204 | |
| 205 | |
| 206 | if (audio->opened) |
| 207 | return -EPERM; |
| 208 | |
| 209 | /* Allocate the decoder */ |
| 210 | audio->dec_id = SESSION_ID_FM; |
| 211 | |
| 212 | audio->running = 0; |
| 213 | audio->fm_source = 0; |
| 214 | audio->fm_dest = 0; |
| 215 | |
| 216 | audio->device_events = AUDDEV_EVT_DEV_RDY |
| 217 | |AUDDEV_EVT_DEV_RLS| |
| 218 | AUDDEV_EVT_STREAM_VOL_CHG; |
| 219 | |
| 220 | rc = auddev_register_evt_listner(audio->device_events, |
| 221 | AUDDEV_CLNT_DEC, |
| 222 | audio->dec_id, |
| 223 | fm_audio_listner, |
| 224 | (void *)audio); |
| 225 | |
| 226 | if (rc) { |
| 227 | pr_err("%s: failed to register listnet\n", __func__); |
| 228 | goto event_err; |
| 229 | } |
| 230 | |
| 231 | audio->opened = 1; |
| 232 | file->private_data = audio; |
| 233 | |
| 234 | event_err: |
| 235 | return rc; |
| 236 | } |
| 237 | |
| 238 | static const struct file_operations audio_fm_fops = { |
| 239 | .owner = THIS_MODULE, |
| 240 | .open = fm_audio_open, |
| 241 | .release = fm_audio_release, |
| 242 | .unlocked_ioctl = fm_audio_ioctl, |
| 243 | }; |
| 244 | |
| 245 | struct miscdevice audio_fm_misc = { |
| 246 | .minor = MISC_DYNAMIC_MINOR, |
| 247 | .name = "msm_fm", |
| 248 | .fops = &audio_fm_fops, |
| 249 | }; |
| 250 | |
| 251 | static int __init fm_audio_init(void) |
| 252 | { |
| 253 | struct audio *audio = &fm_audio; |
| 254 | |
| 255 | mutex_init(&audio->lock); |
| 256 | return misc_register(&audio_fm_misc); |
| 257 | } |
| 258 | |
| 259 | device_initcall(fm_audio_init); |
| 260 | |
| 261 | MODULE_DESCRIPTION("MSM FM driver"); |
| 262 | MODULE_LICENSE("GPL v2"); |