[PATCH v2 3/3] net: stmmac: Add RK3566 SoC support

[Johan Jonker]

On 4/21/21 10:34 PM, Ezequiel Garcia wrote:
> From: David Wu <david.wu at rock-chips.com>
> 
> Add constants and callback functions for the dwmac present
> on RK3566 SoCs. As can be seen, the base structure
> is the same, only registers and the bits in them moved slightly.
> 
> The dwmac IP core version v5.1, and so the compatible string
> is expected to be:
> 
>   compatible = "rockchip,rk3566-gmac", "snps,dwmac-4.20a";
> 
> Signed-off-by: David Wu <david.wu at rock-chips.com>
> [Ezequiel: Separate rk3566-gmac support]
> Signed-off-by: Ezequiel Garcia <ezequiel at collabora.com>
> ---
>  .../bindings/net/rockchip-dwmac.txt           |  1 +
>  .../net/ethernet/stmicro/stmmac/dwmac-rk.c    | 89 +++++++++++++++++++
>  2 files changed, 90 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/net/rockchip-dwmac.txt b/Documentation/devicetree/bindings/net/rockchip-dwmac.txt
> index 3b71da7e8742..3bd4bbcd6c65 100644
> --- a/Documentation/devicetree/bindings/net/rockchip-dwmac.txt
> +++ b/Documentation/devicetree/bindings/net/rockchip-dwmac.txt
> @@ -12,6 +12,7 @@ Required properties:
>     "rockchip,rk3366-gmac": found on RK3366 SoCs
>     "rockchip,rk3368-gmac": found on RK3368 SoCs
>     "rockchip,rk3399-gmac": found on RK3399 SoCs

> +   "rockchip,rk3566-gmac", "snps,dwmac-4.20a": found on RK3566 SoCs

This is still a text document.
rob+dt has now scripts that check for undocumented compatibility
strings, so first convert rockchip-dwmac.txt to YAML and then add this
in a separated patch.

Johan

>     "rockchip,rv1108-gmac": found on RV1108 SoCs
>   - reg: addresses and length of the register sets for the device.
>   - interrupts: Should contain the GMAC interrupts.
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
> index d2637d83899e..a8850bcd980f 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
> @@ -948,6 +948,94 @@ static const struct rk_gmac_ops rk3399_ops = {
>  	.set_rmii_speed = rk3399_set_rmii_speed,
>  };
>  
> +#define RK3568_GRF_GMAC0_CON0		0x0380
> +#define RK3568_GRF_GMAC0_CON1		0x0384
> +#define RK3568_GRF_GMAC1_CON0		0x0388
> +#define RK3568_GRF_GMAC1_CON1		0x038c
> +
> +/* RK3568_GRF_GMAC0_CON1 && RK3568_GRF_GMAC1_CON1 */
> +#define RK3568_GMAC_PHY_INTF_SEL_RGMII	\
> +		(GRF_BIT(4) | GRF_CLR_BIT(5) | GRF_CLR_BIT(6))
> +#define RK3568_GMAC_PHY_INTF_SEL_RMII	\
> +		(GRF_CLR_BIT(4) | GRF_CLR_BIT(5) | GRF_BIT(6))
> +#define RK3568_GMAC_FLOW_CTRL			GRF_BIT(3)
> +#define RK3568_GMAC_FLOW_CTRL_CLR		GRF_CLR_BIT(3)
> +#define RK3568_GMAC_RXCLK_DLY_ENABLE		GRF_BIT(1)
> +#define RK3568_GMAC_RXCLK_DLY_DISABLE		GRF_CLR_BIT(1)
> +#define RK3568_GMAC_TXCLK_DLY_ENABLE		GRF_BIT(0)
> +#define RK3568_GMAC_TXCLK_DLY_DISABLE		GRF_CLR_BIT(0)
> +
> +/* RK3568_GRF_GMAC0_CON0 && RK3568_GRF_GMAC1_CON0 */
> +#define RK3568_GMAC_CLK_RX_DL_CFG(val)	HIWORD_UPDATE(val, 0x7F, 8)
> +#define RK3568_GMAC_CLK_TX_DL_CFG(val)	HIWORD_UPDATE(val, 0x7F, 0)
> +
> +static void rk3566_set_to_rgmii(struct rk_priv_data *bsp_priv,
> +				int tx_delay, int rx_delay)
> +{
> +	struct device *dev = &bsp_priv->pdev->dev;
> +
> +	if (IS_ERR(bsp_priv->grf)) {
> +		dev_err(dev, "Missing rockchip,grf property\n");
> +		return;
> +	}
> +
> +	regmap_write(bsp_priv->grf, RK3568_GRF_GMAC1_CON1,
> +		     RK3568_GMAC_PHY_INTF_SEL_RGMII |
> +		     RK3568_GMAC_RXCLK_DLY_ENABLE |
> +		     RK3568_GMAC_TXCLK_DLY_ENABLE);
> +
> +	regmap_write(bsp_priv->grf, RK3568_GRF_GMAC1_CON0,
> +		     RK3568_GMAC_CLK_RX_DL_CFG(rx_delay) |
> +		     RK3568_GMAC_CLK_TX_DL_CFG(tx_delay));
> +}
> +
> +static void rk3566_set_to_rmii(struct rk_priv_data *bsp_priv)
> +{
> +	struct device *dev = &bsp_priv->pdev->dev;
> +
> +	if (IS_ERR(bsp_priv->grf)) {
> +		dev_err(dev, "%s: Missing rockchip,grf property\n", __func__);
> +		return;
> +	}
> +
> +	regmap_write(bsp_priv->grf, RK3568_GRF_GMAC1_CON1,
> +		     RK3568_GMAC_PHY_INTF_SEL_RMII);
> +}
> +
> +static void rk3566_set_gmac_speed(struct rk_priv_data *bsp_priv, int speed)
> +{
> +	struct device *dev = &bsp_priv->pdev->dev;
> +	unsigned long rate;
> +	int ret;
> +
> +	switch (speed) {
> +	case 10:
> +		rate = 2500000;
> +		break;
> +	case 100:
> +		rate = 25000000;
> +		break;
> +	case 1000:
> +		rate = 125000000;
> +		break;
> +	default:
> +		dev_err(dev, "unknown speed value for GMAC speed=%d", speed);
> +		return;
> +	}
> +
> +	ret = clk_set_rate(bsp_priv->clk_mac_speed, rate);
> +	if (ret)
> +		dev_err(dev, "%s: set clk_mac_speed rate %ld failed %d\n",
> +			__func__, rate, ret);
> +}
> +
> +static const struct rk_gmac_ops rk3566_ops = {
> +	.set_to_rgmii = rk3566_set_to_rgmii,
> +	.set_to_rmii = rk3566_set_to_rmii,
> +	.set_rgmii_speed = rk3566_set_gmac_speed,
> +	.set_rmii_speed = rk3566_set_gmac_speed,
> +};
> +
>  #define RV1108_GRF_GMAC_CON0		0X0900
>  
>  /* RV1108_GRF_GMAC_CON0 */
> @@ -1512,6 +1600,7 @@ static const struct of_device_id rk_gmac_dwmac_match[] = {
>  	{ .compatible = "rockchip,rk3366-gmac", .data = &rk3366_ops },
>  	{ .compatible = "rockchip,rk3368-gmac", .data = &rk3368_ops },
>  	{ .compatible = "rockchip,rk3399-gmac", .data = &rk3399_ops },
> +	{ .compatible = "rockchip,rk3566-gmac", .data = &rk3566_ops },
>  	{ .compatible = "rockchip,rv1108-gmac", .data = &rv1108_ops },
>  	{ }
>  };
>