diff options
| author | Vinod Subbarayalu <vsubbarayalu@nvidia.com> | 2013-08-01 16:03:53 -0700 |
|---|---|---|
| committer | Riham Haidar <rhaidar@nvidia.com> | 2013-08-14 18:57:26 -0700 |
| commit | c594b04883ec9528114188c70bacdbcf4df23380 (patch) | |
| tree | 8a337eba62d339b63a07e09bf92c0c9b230e3254 /drivers/misc/tfa9887.c | |
| parent | 6d41daab2b4d6ede2e16a0b0354631e8a6648d8b (diff) | |
audio:Support Tfa9887 at different samplerate
Configure Tfa9887 at 16k for voip+nvoice usecase.
Add missing copyright info.
Change-Id: I080e874510255f1b2a4bf7d8045ef8fa6e2faadc
Signed-off-by: Vinod Subbarayalu <vsubbarayalu@nvidia.com>
Reviewed-on: http://git-master/r/257042
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Scott Peterson <speterson@nvidia.com>
Diffstat (limited to 'drivers/misc/tfa9887.c')
| -rw-r--r-- | drivers/misc/tfa9887.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/drivers/misc/tfa9887.c b/drivers/misc/tfa9887.c index 38538afc08d3..d8c1b8c59b22 100644 --- a/drivers/misc/tfa9887.c +++ b/drivers/misc/tfa9887.c @@ -1,3 +1,19 @@ +/* + * drivers/misc/tfa9887.c + * + * Copyright (c) 2013, NVIDIA CORPORATION. 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/kernel.h> #include <linux/init.h> #include <linux/err.h> @@ -893,6 +909,72 @@ int Tfa9887_SetVolume(unsigned int index) return error; } +int Tfa9887_setSampleRate(int sRate) +{ + if (tfa9887R) { + mutex_lock(&tfa9887R->lock); + if (tfa9887R->deviceInit) + setSampleRate(tfa9887R, sRate); + mutex_unlock(&tfa9887R->lock); + } + if (tfa9887L) { + mutex_lock(&tfa9887L->lock); + if (tfa9887L->deviceInit) + setSampleRate(tfa9887L, sRate); + mutex_unlock(&tfa9887L->lock); + } +} + +int setSampleRate(struct tfa9887_priv *tfa9887, int sRate) +{ + + int error; + unsigned int value; + + /*Set Sampling Frequency*/ + + error = Tfa9887_ReadRegister(tfa9887, TFA9887_I2S_CONTROL, &value); + if (error == Tfa9887_Error_Ok) { + /* clear the 4 bits first*/ + value &= (~(0xF<<TFA9887_I2SCTRL_RATE_SHIFT)); + switch (sRate) { + case 48000: + value |= TFA9887_I2SCTRL_RATE_48000; + break; + case 44100: + value |= TFA9887_I2SCTRL_RATE_44100; + break; + case 32000: + value |= TFA9887_I2SCTRL_RATE_32000; + break; + case 24000: + value |= TFA9887_I2SCTRL_RATE_24000; + break; + case 22050: + value |= TFA9887_I2SCTRL_RATE_22050; + break; + case 16000: + value |= TFA9887_I2SCTRL_RATE_16000; + break; + case 12000: + value |= TFA9887_I2SCTRL_RATE_12000; + break; + case 11025: + value |= TFA9887_I2SCTRL_RATE_11025; + break; + case 8000: + value |= TFA9887_I2SCTRL_RATE_08000; + break; + default: + pr_info("unsupported samplerate\n"); + error = -1; + return error; + } + error = Tfa9887_WriteRegister(tfa9887, + TFA9887_I2S_CONTROL, value); + } +} + int coldStartup(struct tfa9887_priv *tfa9887, struct tfa9887_priv *tfa9887_byte, int sRate) { int error,volume_value; @@ -1665,3 +1747,7 @@ static void __exit tfa9887_exit(void) } module_exit(tfa9887_exit); +MODULE_AUTHOR("Vinod Subbarayalu <vsubbarayalu@nvidia.com>, Scott Peterson <speterson@nvidia.com>"); +MODULE_DESCRIPTION("TFA9887 Audio Codec driver"); +MODULE_LICENSE("GPL"); + |