linux-kernel - Re: [PATCH v2 2/5] usb: dwc2: support dwc2 IP for Amlogic A1 SoC family

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Message-ID: <8fdc2299-1c81-3472-b1ce-2187886b4568@synopsys.com>
Date:   Fri, 21 Apr 2023 04:51:06 +0000
From:   Minas Harutyunyan <Minas.Harutyunyan@...opsys.com>
To:     Dmitry Rokosov <ddrokosov@...rdevices.ru>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>,
        "neil.armstrong@...aro.org" <neil.armstrong@...aro.org>,
        "khilman@...libre.com" <khilman@...libre.com>,
        "jbrunet@...libre.com" <jbrunet@...libre.com>,
        "martin.blumenstingl@...glemail.com" 
        <martin.blumenstingl@...glemail.com>,
        "mturquette@...libre.com" <mturquette@...libre.com>,
        "vkoul@...nel.org" <vkoul@...nel.org>,
        "kishon@...nel.org" <kishon@...nel.org>,
        Minas Harutyunyan <Minas.Harutyunyan@...opsys.com>,
        Thinh Nguyen <Thinh.Nguyen@...opsys.com>
CC:     "yue.wang@...ogic.com" <yue.wang@...ogic.com>,
        "hanjie.lin@...ogic.com" <hanjie.lin@...ogic.com>,
        "kernel@...rdevices.ru" <kernel@...rdevices.ru>,
        "rockosov@...il.com" <rockosov@...il.com>,
        "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-amlogic@...ts.infradead.org" 
        <linux-amlogic@...ts.infradead.org>,
        "linux-phy@...ts.infradead.org" <linux-phy@...ts.infradead.org>
Subject: Re: [PATCH v2 2/5] usb: dwc2: support dwc2 IP for Amlogic A1 SoC
 family

On 4/18/23 15:16, Dmitry Rokosov wrote:
> The Amlogic A1 uses dwc2 Synopsys IP as its USB peripheral (gadget)
> endpoint, with different DWC2 parameters when compared to previous
> Amlogic SoCs.
> 
> Signed-off-by: Dmitry Rokosov <ddrokosov@...rdevices.ru>

Acked-by: Minas Harutyunyan <Minas.Harutyunyan@...opsys.com>


> ---
>   drivers/usb/dwc2/params.c | 21 +++++++++++++++++++++
>   1 file changed, 21 insertions(+)
> 
> diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c
> index 9ed9fd956940..098fbfc774ab 100644
> --- a/drivers/usb/dwc2/params.c
> +++ b/drivers/usb/dwc2/params.c
> @@ -161,6 +161,25 @@ static void dwc2_set_amlogic_g12a_params(struct dwc2_hsotg *hsotg)
>   	p->hird_threshold_en = false;
>   }
>   
> +static void dwc2_set_amlogic_a1_params(struct dwc2_hsotg *hsotg)
> +{
> +	struct dwc2_core_params *p = &hsotg->params;
> +
> +	p->otg_caps.hnp_support = false;
> +	p->otg_caps.srp_support = false;
> +	p->speed = DWC2_SPEED_PARAM_HIGH;
> +	p->host_rx_fifo_size = 192;
> +	p->host_nperio_tx_fifo_size = 128;
> +	p->host_perio_tx_fifo_size = 128;
> +	p->phy_type = DWC2_PHY_TYPE_PARAM_UTMI;
> +	p->phy_utmi_width = 8;
> +	p->ahbcfg = GAHBCFG_HBSTLEN_INCR8 << GAHBCFG_HBSTLEN_SHIFT;
> +	p->lpm = false;
> +	p->lpm_clock_gating = false;
> +	p->besl = false;
> +	p->hird_threshold_en = false;
> +}
> +
>   static void dwc2_set_amcc_params(struct dwc2_hsotg *hsotg)
>   {
>   	struct dwc2_core_params *p = &hsotg->params;
> @@ -258,6 +277,8 @@ const struct of_device_id dwc2_of_match_table[] = {
>   	  .data = dwc2_set_amlogic_params },
>   	{ .compatible = "amlogic,meson-g12a-usb",
>   	  .data = dwc2_set_amlogic_g12a_params },
> +	{ .compatible = "amlogic,meson-a1-usb",
> +	  .data = dwc2_set_amlogic_a1_params },
>   	{ .compatible = "amcc,dwc-otg", .data = dwc2_set_amcc_params },
>   	{ .compatible = "apm,apm82181-dwc-otg", .data = dwc2_set_amcc_params },
>   	{ .compatible = "st,stm32f4x9-fsotg",