Commit b4ac9456 authored by Tobias Schramm's avatar Tobias Schramm Committed by David S. Miller
Browse files

net: stmmac: dwmac-rk: add support for rk3308 gmac 



The Rockchip RK3308 SoC has a gmac with only the RMII interface signals
exposed.
This patch adds support for it.

Signed-off-by: default avatarTobias Schramm <t.schramm@manjaro.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 2cc8c910

drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c

+49 −0
Original line number Diff line number Diff line
@@ -482,6 +482,54 @@ static const struct rk_gmac_ops rk3288_ops = { 
	.set_rmii_speed = rk3288_set_rmii_speed,

};



#define RK3308_GRF_MAC_CON0		0x04a0



/* RK3308_GRF_MAC_CON0 */

#define RK3308_GMAC_PHY_INTF_SEL_RMII	(GRF_CLR_BIT(2) | GRF_CLR_BIT(3) | \

					GRF_BIT(4))

#define RK3308_GMAC_FLOW_CTRL		GRF_BIT(3)

#define RK3308_GMAC_FLOW_CTRL_CLR	GRF_CLR_BIT(3)

#define RK3308_GMAC_SPEED_10M		GRF_CLR_BIT(0)

#define RK3308_GMAC_SPEED_100M		GRF_BIT(0)



static void rk3308_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, "Missing rockchip,grf property\n");

		return;

	}



	regmap_write(bsp_priv->grf, RK3308_GRF_MAC_CON0,

		     RK3308_GMAC_PHY_INTF_SEL_RMII);

}



static void rk3308_set_rmii_speed(struct rk_priv_data *bsp_priv, int speed)

{

	struct device *dev = &bsp_priv->pdev->dev;



	if (IS_ERR(bsp_priv->grf)) {

		dev_err(dev, "Missing rockchip,grf property\n");

		return;

	}



	if (speed == 10) {

		regmap_write(bsp_priv->grf, RK3308_GRF_MAC_CON0,

			     RK3308_GMAC_SPEED_10M);

	} else if (speed == 100) {

		regmap_write(bsp_priv->grf, RK3308_GRF_MAC_CON0,

			     RK3308_GMAC_SPEED_100M);

	} else {

		dev_err(dev, "unknown speed value for RMII! speed=%d", speed);

	}

}



static const struct rk_gmac_ops rk3308_ops = {

	.set_to_rmii = rk3308_set_to_rmii,

	.set_rmii_speed = rk3308_set_rmii_speed,

};



#define RK3328_GRF_MAC_CON0	0x0900

#define RK3328_GRF_MAC_CON1	0x0904

#define RK3328_GRF_MAC_CON2	0x0908
@@ -1477,6 +1525,7 @@ static const struct of_device_id rk_gmac_dwmac_match[] = { 
	{ .compatible = "rockchip,rk3128-gmac", .data = &rk3128_ops },

	{ .compatible = "rockchip,rk3228-gmac", .data = &rk3228_ops },

	{ .compatible = "rockchip,rk3288-gmac", .data = &rk3288_ops },

	{ .compatible = "rockchip,rk3308-gmac", .data = &rk3308_ops },

	{ .compatible = "rockchip,rk3328-gmac", .data = &rk3328_ops },

	{ .compatible = "rockchip,rk3366-gmac", .data = &rk3366_ops },

	{ .compatible = "rockchip,rk3368-gmac", .data = &rk3368_ops },