Re: [PATCH v2 3/6] phy: amlogic: Add Amlogic A1 USB2 PHY Driver

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




On 2019/12/18 21:17, Neil Armstrong wrote:
> Hi,
> 
> On 18/12/2019 03:42, Hanjie Lin wrote:
>> This adds support for the USB2 PHY found in the Amlogic A1 SoC Family.
>>
>> It supports host mode only.
>>
>> Signed-off-by: Hanjie Lin <hanjie.lin@xxxxxxxxxxx>
>> Signed-off-by: Yue Wang <yue.wang@xxxxxxxxxxx>
>> ---
>>  drivers/phy/amlogic/phy-meson-g12a-usb2.c | 102 ++++++++++++++++++++++--------
>>  1 file changed, 74 insertions(+), 28 deletions(-)
>>
>> diff --git a/drivers/phy/amlogic/phy-meson-g12a-usb2.c b/drivers/phy/amlogic/phy-meson-g12a-usb2.c
>> index 9065ffc..2c242d3 100644
>> --- a/drivers/phy/amlogic/phy-meson-g12a-usb2.c
>> +++ b/drivers/phy/amlogic/phy-meson-g12a-usb2.c
>> @@ -146,11 +146,18 @@
>>  #define RESET_COMPLETE_TIME					1000
>>  #define PLL_RESET_COMPLETE_TIME					100
>>  
>> +enum {
>> +	MESON_USB2_PHY_VERSION_10 = 0,
>> +	MESON_USB2_PHY_VERSION_11,
> 
> Are these the real "versions" of the phy or it's made up ?
> 

This version is made up and only for distinguish a1 and g12a.

>> +	MESON_USB2_PHY_VERSION_COUNT,
>> +};
>> +
>>  struct phy_meson_g12a_usb2_priv {
>>  	struct device		*dev;
>>  	struct regmap		*regmap;
>>  	struct clk		*clk;
>>  	struct reset_control	*reset;
>> +	int phy_version;
>>  };
>>  
>>  static const struct regmap_config phy_meson_g12a_usb2_regmap_conf = {
>> @@ -192,18 +199,33 @@ static int phy_meson_g12a_usb2_init(struct phy *phy)
>>  		     FIELD_PREP(PHY_CTRL_R17_MPLL_FILTER_PVT2, 2) |
>>  		     FIELD_PREP(PHY_CTRL_R17_MPLL_FILTER_PVT1, 9));
>>  
>> -	regmap_write(priv->regmap, PHY_CTRL_R18,
>> -		     FIELD_PREP(PHY_CTRL_R18_MPLL_LKW_SEL, 1) |
>> -		     FIELD_PREP(PHY_CTRL_R18_MPLL_LK_W, 9) |
>> -		     FIELD_PREP(PHY_CTRL_R18_MPLL_LK_S, 0x27) |
>> -		     FIELD_PREP(PHY_CTRL_R18_MPLL_PFD_GAIN, 1) |
>> -		     FIELD_PREP(PHY_CTRL_R18_MPLL_ROU, 7) |
>> -		     FIELD_PREP(PHY_CTRL_R18_MPLL_DATA_SEL, 3) |
>> -		     FIELD_PREP(PHY_CTRL_R18_MPLL_BIAS_ADJ, 1) |
>> -		     FIELD_PREP(PHY_CTRL_R18_MPLL_BB_MODE, 0) |
>> -		     FIELD_PREP(PHY_CTRL_R18_MPLL_ALPHA, 3) |
>> -		     FIELD_PREP(PHY_CTRL_R18_MPLL_ADJ_LDO, 1) |
>> -		     PHY_CTRL_R18_MPLL_ACG_RANGE);
>> +	if (priv->phy_version == MESON_USB2_PHY_VERSION_10)
>> +		regmap_write(priv->regmap, PHY_CTRL_R18,
>> +			     FIELD_PREP(PHY_CTRL_R18_MPLL_LKW_SEL, 1) |
>> +			     FIELD_PREP(PHY_CTRL_R18_MPLL_LK_W, 9) |
>> +			     FIELD_PREP(PHY_CTRL_R18_MPLL_LK_S, 0x27) |
>> +			     FIELD_PREP(PHY_CTRL_R18_MPLL_PFD_GAIN, 1) |
>> +			     FIELD_PREP(PHY_CTRL_R18_MPLL_ROU, 7) |
>> +			     FIELD_PREP(PHY_CTRL_R18_MPLL_DATA_SEL, 3) |
>> +			     FIELD_PREP(PHY_CTRL_R18_MPLL_BIAS_ADJ, 1) |
>> +			     FIELD_PREP(PHY_CTRL_R18_MPLL_BB_MODE, 0) |
>> +			     FIELD_PREP(PHY_CTRL_R18_MPLL_ALPHA, 3) |
>> +			     FIELD_PREP(PHY_CTRL_R18_MPLL_ADJ_LDO, 1) |
>> +			     PHY_CTRL_R18_MPLL_ACG_RANGE);
>> +	else if (priv->phy_version == MESON_USB2_PHY_VERSION_11)
>> +		regmap_write(priv->regmap, PHY_CTRL_R18,
>> +			     FIELD_PREP(PHY_CTRL_R18_MPLL_LKW_SEL, 1) |
>> +			     FIELD_PREP(PHY_CTRL_R18_MPLL_LK_W, 9) |
>> +			     FIELD_PREP(PHY_CTRL_R18_MPLL_LK_S, 0x27) |
>> +			     FIELD_PREP(PHY_CTRL_R18_MPLL_PFD_GAIN, 1) |
>> +			     FIELD_PREP(PHY_CTRL_R18_MPLL_ROU, 7) |
>> +			     FIELD_PREP(PHY_CTRL_R18_MPLL_DATA_SEL, 3) |
>> +			     FIELD_PREP(PHY_CTRL_R18_MPLL_BIAS_ADJ, 1) |
>> +			     FIELD_PREP(PHY_CTRL_R18_MPLL_BB_MODE, 0) |
>> +			     FIELD_PREP(PHY_CTRL_R18_MPLL_ALPHA, 3) |
>> +			     FIELD_PREP(PHY_CTRL_R18_MPLL_ADJ_LDO, 1) |
>> +			     PHY_CTRL_R18_MPLL_ACG_RANGE |
>> +			     PHY_CTRL_R18_MPLL_DCO_CLK_SEL);
> 
> The only difference is PHY_CTRL_R18_MPLL_ACG_RANGE | PHY_CTRL_R18_MPLL_DCO_CLK_SEL,
> you can easily simplify the code here by using a temp variable.
> 

Yes, it will looks more clearly.

>>  
>>  	udelay(PLL_RESET_COMPLETE_TIME);
>>  
>> @@ -227,13 +249,24 @@ static int phy_meson_g12a_usb2_init(struct phy *phy)
>>  		     FIELD_PREP(PHY_CTRL_R20_USB2_BGR_VREF_4_0, 0) |
>>  		     FIELD_PREP(PHY_CTRL_R20_USB2_BGR_DBG_1_0, 0));
>>  
>> -	regmap_write(priv->regmap, PHY_CTRL_R4,
>> -		     FIELD_PREP(PHY_CTRL_R4_CALIB_CODE_7_0, 0xf) |
>> -		     FIELD_PREP(PHY_CTRL_R4_CALIB_CODE_15_8, 0xf) |
>> -		     FIELD_PREP(PHY_CTRL_R4_CALIB_CODE_23_16, 0xf) |
>> -		     PHY_CTRL_R4_TEST_BYPASS_MODE_EN |
>> -		     FIELD_PREP(PHY_CTRL_R4_I_C2L_BIAS_TRIM_1_0, 0) |
>> -		     FIELD_PREP(PHY_CTRL_R4_I_C2L_BIAS_TRIM_3_2, 0));
>> +	if (priv->phy_version == MESON_USB2_PHY_VERSION_10)
>> +		regmap_write(priv->regmap, PHY_CTRL_R4,
>> +			     FIELD_PREP(PHY_CTRL_R4_CALIB_CODE_7_0, 0xf) |
>> +			     FIELD_PREP(PHY_CTRL_R4_CALIB_CODE_15_8, 0xf) |
>> +			     FIELD_PREP(PHY_CTRL_R4_CALIB_CODE_23_16, 0xf) |
>> +			     PHY_CTRL_R4_TEST_BYPASS_MODE_EN |
>> +			     FIELD_PREP(PHY_CTRL_R4_I_C2L_BIAS_TRIM_1_0, 0) |
>> +			     FIELD_PREP(PHY_CTRL_R4_I_C2L_BIAS_TRIM_3_2, 0));
>> +	else if (priv->phy_version == MESON_USB2_PHY_VERSION_11) {
>> +		regmap_write(priv->regmap, PHY_CTRL_R21,
>> +			     PHY_CTRL_R21_USB2_CAL_ACK_EN |
>> +			     PHY_CTRL_R21_USB2_TX_STRG_PD |
>> +			     FIELD_PREP(PHY_CTRL_R21_USB2_OTG_ACA_TRIM_1_0, 2));
>> +
>> +		/* Analog Settings */
>> +		regmap_write(priv->regmap, PHY_CTRL_R13,
>> +			     FIELD_PREP(PHY_CTRL_R13_MIN_COUNT_FOR_SYNC_DET, 7));
>> +	}
>>  
>>  	/* Tuning Disconnect Threshold */
>>  	regmap_write(priv->regmap, PHY_CTRL_R3,
>> @@ -241,11 +274,13 @@ static int phy_meson_g12a_usb2_init(struct phy *phy)
>>  		     FIELD_PREP(PHY_CTRL_R3_HSDIC_REF, 1) |
>>  		     FIELD_PREP(PHY_CTRL_R3_DISC_THRESH, 3));
>>  
>> -	/* Analog Settings */
>> -	regmap_write(priv->regmap, PHY_CTRL_R14, 0);
>> -	regmap_write(priv->regmap, PHY_CTRL_R13,
>> -		     PHY_CTRL_R13_UPDATE_PMA_SIGNALS |
>> -		     FIELD_PREP(PHY_CTRL_R13_MIN_COUNT_FOR_SYNC_DET, 7));
>> +	if (priv->phy_version == MESON_USB2_PHY_VERSION_10) {
>> +		/* Analog Settings */
>> +		regmap_write(priv->regmap, PHY_CTRL_R14, 0);
>> +		regmap_write(priv->regmap, PHY_CTRL_R13,
>> +			     PHY_CTRL_R13_UPDATE_PMA_SIGNALS |
>> +			     FIELD_PREP(PHY_CTRL_R13_MIN_COUNT_FOR_SYNC_DET, 7));
>> +	}
>>  
>>  	return 0;
>>  }
>> @@ -271,6 +306,7 @@ static int phy_meson_g12a_usb2_probe(struct platform_device *pdev)
>>  	struct resource *res;
>>  	struct phy_meson_g12a_usb2_priv *priv;
>>  	struct phy *phy;
>> +	struct device_node *np = dev->of_node;
>>  	void __iomem *base;
>>  	int ret;
>>  
>> @@ -286,14 +322,23 @@ static int phy_meson_g12a_usb2_probe(struct platform_device *pdev)
>>  	if (IS_ERR(base))
>>  		return PTR_ERR(base);
>>  
>> +	if (of_device_is_compatible(np, "amlogic,g12a-usb2-phy"))
>> +		priv->phy_version = MESON_USB2_PHY_VERSION_10;
>> +	else if (of_device_is_compatible(np, "amlogic,a1-usb2-phy"))
>> +		priv->phy_version = MESON_USB2_PHY_VERSION_11;
>> +	else
>> +		return -EINVAL;
> 
> Please use of_device_get_match_data() and a match data for each compatible instead.
> 

OK, I will fix it in next version.

>> +
>>  	priv->regmap = devm_regmap_init_mmio(dev, base,
>>  					     &phy_meson_g12a_usb2_regmap_conf);
>>  	if (IS_ERR(priv->regmap))
>>  		return PTR_ERR(priv->regmap);
>>  
>> -	priv->clk = devm_clk_get(dev, "xtal");
>> -	if (IS_ERR(priv->clk))
>> -		return PTR_ERR(priv->clk);
>> +	if (priv->phy_version == MESON_USB2_PHY_VERSION_10) {
>> +		priv->clk = devm_clk_get(dev, "xtal");
>> +		if (IS_ERR(priv->clk))
>> +			return PTR_ERR(priv->clk);
>> +	}
>>  
>>  	priv->reset = devm_reset_control_get(dev, "phy");
>>  	if (IS_ERR(priv->reset))
>> @@ -322,7 +367,8 @@ static int phy_meson_g12a_usb2_probe(struct platform_device *pdev)
>>  
>>  static const struct of_device_id phy_meson_g12a_usb2_of_match[] = {
>>  	{ .compatible = "amlogic,g12a-usb2-phy", },
>> -	{ },
>> +	{ .compatible = "amlogic,a1-usb2-phy", },
>> +	{ /* Sentinel */ }
>>  };
>>  MODULE_DEVICE_TABLE(of, phy_meson_g12a_usb2_of_match);
>>  
>>
> 
> Thanks,
> Neil
> 
> .
> 

Thanks,
Hanjie.Lin



[Index of Archives]     [Device Tree Compilter]     [Device Tree Spec]     [Linux Driver Backports]     [Video for Linux]     [Linux USB Devel]     [Linux PCI Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Yosemite Backpacking]


  Powered by Linux