Failed to get supply 'IOVDD': -19

eric wangxj

我调试音频驱动，加载驱动时，调试信息显示：

什么原因啊？

[    1.475982] usbhid: USB HID core driver
[    1.480590] usbcore: registered new interface driver snd-usb-audio
[    1.488128] tlv320aic3x-codec 3-001b: ---wxj---aic3x_i2c_probe()
[    1.494445] tlv320aic3x-codec 3-001b: ---wxj---aic3x->control_type = SND_SOC_I2C
[    1.502197] tlv320aic3x-codec 3-001b: ---wxj---snd_soc_register_codec return 0
[    1.510833] ---wxj---soc-core.c soc_bind_dai_link(), binding TLV320AIC3X at idx 0
[    1.518768] tlv320aic3x-codec 3-001b: ---wxj---tlv320aic3x.c aic3x_probe()
[    1.526000] tlv320aic3x-codec 3-001b: Failed to get supply 'IOVDD': -19
[    1.532928] tlv320aic3x-codec 3-001b: Failed to request supplies: -19
[    1.539642] tlv320aic3x-codec 3-001b: asoc: failed to probe CODEC tlv320aic3x-codec.3-001b: -19
[    1.548767] asoc: failed to instantiate card AM335X EVM: -19
[    1.554718] ALSA device list:
[    1.557800]   No soundcards found.

12 年多前

0 Yaoming Qin 12 年多前

TI__Mastermind 35157 points

请问您的音频芯片是哪个？

0 eric wangxj 12 年多前回复 Yaoming Qin

Intellectual 530 points

TLV3106

完整名字：TLV320AIC3106RGZ

0 Yaoming Qin 12 年多前回复 eric wangxj

TI__Mastermind 35157 points

从log来看，建议您查下您的电路，尤其是音频芯片的供电部分是否正确

0 eric wangxj 12 年多前回复 Yaoming Qin

Intellectual 530 points

音频芯片的供电部分，测试正常3.3伏

0 Yaoming Qin 12 年多前回复 eric wangxj

TI__Mastermind 35157 points

看log应该是i2c没有正确找到i2c，codec和335x这边是怎么连的，多看看了。

0 eric wangxj 12 年多前回复 Yaoming Qin

Intellectual 530 points

这个是我们的硬件工程师，提供的连接图。

0 eric wangxj 12 年多前回复 eric wangxj

Intellectual 530 points

问题应该出在I2C的控制上，测试I2C的时钟线，发现没有时钟信号

那么，为什么I2C的时钟线上没有时钟信号呢？

0 Yaoming Qin 12 年多前回复 eric wangxj

TI__Mastermind 35157 points

你用的i2c和evm板上是一个么，如果不是，需要修改驱动

0 eric wangxj 12 年多前回复 Yaoming Qin

Intellectual 530 points

不是同一个。

那么，您说的驱动，是改什么地方呢。

我已经对pin-mux等地方，做了修改，包括I2C总线的ID对应关系。

0 eric wangxj 12 年多前回复 eric wangxj

Intellectual 530 points

我已经修改的地方：

首先，修改board-support/linux-3.2-psp04.06.00.07.sdk/arch/arm/mach-omap2/board-am33txevm.c
增加以下代码

/* Module pin mux for mcasp0 */
static struct pinmux_config mcasp0_pin_mux[] = {
{"mcasp0_aclkx.mcasp0_aclkx", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLDOWN},
{"mcasp0_fsx.mcasp0_fsx", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLDOWN},
{"mcasp0_axr0.mcasp0_axr0", OMAP_MUX_MODE0 | AM33XX_PIN_INPUT_PULLDOWN},
{"mcasp0_ahclkr.mcasp0_axr2", OMAP_MUX_MODE2 | AM33XX_PIN_INPUT_PULLDOWN},
{NULL, 0},
};

static u8 am335x_iis_serializer_direction0[] = {
TX_MODE, INACTIVE_MODE, RX_MODE, INACTIVE_MODE,
INACTIVE_MODE, INACTIVE_MODE, INACTIVE_MODE, INACTIVE_MODE,
INACTIVE_MODE, INACTIVE_MODE, INACTIVE_MODE, INACTIVE_MODE,
INACTIVE_MODE, INACTIVE_MODE, INACTIVE_MODE, INACTIVE_MODE,
};

static struct snd_platform_data am335x_evm_snd_data0 = {
.tx_dma_offset = 0x46000000, /* McASP0 */
.rx_dma_offset = 0x46000000,
.op_mode = DAVINCI_MCASP_IIS_MODE,
.num_serializer = ARRAY_SIZE(am335x_iis_serializer_direction0),
.tdm_slots = 2,
.serial_dir = am335x_iis_serializer_direction0,
.asp_chan_q = EVENTQ_2,
.version = MCASP_VERSION_3,
.txnumevt = 1,
.rxnumevt = 1,
};

static void mcasp0_init(int evm_id, int profile)
{
/* Configure McASP */
setup_pin_mux(mcasp0_pin_mux);
am335x_register_mcasp(&am335x_evm_snd_data0, 0);
return;
}

static struct evm_dev_cfg beaglebone_dev_cfg[] = {
......
{mcasp0_init, DEV_ON_BASEBOARD, PROFILE_NONE},
....
}

其次修改：sound/soc/davinci/davinci-evm.c
static struct snd_soc_dai_link am335x_evm_dai = {
.name = "TLV320AIC3X",
.stream_name = "AIC3X",
.cpu_dai_name = "davinci-mcasp.0", //1-->0
.codec_dai_name = "tlv320aic3x-hifi",
.codec_name = "tlv320aic3x-codec.3-001b", //2-->1
.platform_name = "davinci-pcm-audio",
.init = evm_aic3x_init,
.ops = &evm_ops,
};

0 Yaoming Qin 12 年多前回复 eric wangxj

TI__Mastermind 35157 points

I2C 部分的代码没有配置，需要配置

0 eric wangxj 12 年多前回复 Yaoming Qin

Intellectual 530 points

static struct pinmux_config i2c2_pin_mux[] = {
{"spi0_sclk.i2c2_sda",    OMAP_MUX_MODE2 | AM33XX_SLEWCTRL_SLOW |
     AM33XX_PULL_UP | AM33XX_INPUT_EN},
{"spi0_d0.i2c2_scl",   OMAP_MUX_MODE2 | AM33XX_SLEWCTRL_SLOW |
     AM33XX_PULL_UP | AM33XX_INPUT_EN},
{NULL, 0},
};

static struct i2c_board_info am335x_i2c_boardinfo2[] = {
    {
       I2C_BOARD_INFO("tlv320aic3x", 0x1b),
    },
};

static void i2c2_init(int evm_id, int profile)
{
    setup_pin_mux(i2c2_pin_mux);
   omap_register_i2c_bus(3, 400, am335x_i2c_boardinfo2,
        ARRAY_SIZE(am335x_i2c_boardinfo2));
   return;
}

是这个吗

0 qun zhou 10 年多前回复 eric wangxj

Expert 2161 points

您好：

我也遇到了和您一样的问题，请问您解决了吗？

0 qun zhou 10 年多前回复 Yaoming Qin

Expert 2161 points

您好：

我也遇到了一样的问题，我们用的是I2C2，i2c2这部分已经配置好了。

static struct pinmux_config i2c2_pin_mux[] = {
   {"uart1_ctsn.i2c2_sda",    OMAP_MUX_MODE3 | AM33XX_SLEWCTRL_SLOW |
                   AM33XX_PULL_UP | AM33XX_INPUT_EN},
   {"uart1_rtsn.i2c2_scl",   OMAP_MUX_MODE3 | AM33XX_SLEWCTRL_SLOW |
                   AM33XX_PULL_UP | AM33XX_INPUT_EN},
   {NULL, 0},
};

static void i2c2_init(int evm_id, int profile)
{
   printk("++++zhouqun i2c2_init\n");
   setup_pin_mux(i2c2_pin_mux);
   omap_register_i2c_bus(3, 100, am335x_i2c2_boardinfo,
           ARRAY_SIZE(am335x_i2c2_boardinfo));
   return;
}
static struct i2c_board_info am335x_i2c2_boardinfo[] = {
   {
       I2C_BOARD_INFO("tlv320aic3x", 0x18),
   },

};

log:

[    1.738555] ++++++snd_soc_register_codec:0
[    1.743804] ++++++++++++++++zhouqun:davinci_mcasp_init
[    1.743835] ++++++++++++++==zhouqun : davinci_mcasp_probe
[    1.755737] +++++++zhouqun :evm_init
[    1.759582] ++++zhouqun am335x_evm?
[    1.765045] ++++++++++soc_bind_dai_link
[    1.769134] ++++++++zhouqun:binding TLV320AIC3X at idx 0
[    1.775024] +++++++++++++++ aic3x_probe
[    1.779144] tlv320aic3x-codec 1-001b: Failed to get supply 'IOVDD': -19
[    1.786224] tlv320aic3x-codec 1-001b: Failed to request supplies: -19
[    1.793090] tlv320aic3x-codec 1-001b: asoc: failed to probe CODEC tlv320aic39
[    1.802398] asoc: failed to instantiate card AM335X EVM: -19
[    1.808471] ALSA device list:
[    1.811614]   No soundcards found.

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Failed to get supply 'IOVDD': -19