Commit 2010163a authored by David Wu's avatar David Wu Committed by Jakub Kicinski
Browse files

ethernet: stmmac: dwmac-rk: Add RK3506 GMAC support 



Add the needed glue blocks for the RK3506-specific setup.

The RK3506 dwmac only supports up to 100MBit with a RMII PHY,
but no RGMII.

Signed-off-by: default avatarDavid Wu <david.wu@rock-chips.com>
Signed-off-by: default avatarHeiko Stuebner <heiko@sntech.de>
Link: https://patch.msgid.link/20251023111213.298860-5-heiko@sntech.de


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 4a667bec

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

+64 −0
Original line number Diff line number Diff line
@@ -827,6 +827,69 @@ static const struct rk_gmac_ops rk3399_ops = { 
	.set_speed = rk3399_set_speed,

};



#define RK3506_GRF_SOC_CON8		0x0020

#define RK3506_GRF_SOC_CON11		0x002c



#define RK3506_GMAC_RMII_MODE		GRF_BIT(1)



#define RK3506_GMAC_CLK_RMII_DIV2	GRF_BIT(3)

#define RK3506_GMAC_CLK_RMII_DIV20	GRF_CLR_BIT(3)



#define RK3506_GMAC_CLK_SELECT_CRU	GRF_CLR_BIT(5)

#define RK3506_GMAC_CLK_SELECT_IO	GRF_BIT(5)



#define RK3506_GMAC_CLK_RMII_GATE	GRF_BIT(2)

#define RK3506_GMAC_CLK_RMII_NOGATE	GRF_CLR_BIT(2)



static void rk3506_set_to_rmii(struct rk_priv_data *bsp_priv)

{

	unsigned int id = bsp_priv->id, offset;



	offset = (id == 1) ? RK3506_GRF_SOC_CON11 : RK3506_GRF_SOC_CON8;

	regmap_write(bsp_priv->grf, offset, RK3506_GMAC_RMII_MODE);

}



static const struct rk_reg_speed_data rk3506_reg_speed_data = {

	.rmii_10 = RK3506_GMAC_CLK_RMII_DIV20,

	.rmii_100 = RK3506_GMAC_CLK_RMII_DIV2,

};



static int rk3506_set_speed(struct rk_priv_data *bsp_priv,

			    phy_interface_t interface, int speed)

{

	unsigned int id = bsp_priv->id, offset;



	offset = (id == 1) ? RK3506_GRF_SOC_CON11 : RK3506_GRF_SOC_CON8;

	return rk_set_reg_speed(bsp_priv, &rk3506_reg_speed_data,

				offset, interface, speed);

}



static void rk3506_set_clock_selection(struct rk_priv_data *bsp_priv,

				       bool input, bool enable)

{

	unsigned int value, offset, id = bsp_priv->id;



	offset = (id == 1) ? RK3506_GRF_SOC_CON11 : RK3506_GRF_SOC_CON8;



	value = input ? RK3506_GMAC_CLK_SELECT_IO :

			RK3506_GMAC_CLK_SELECT_CRU;

	value |= enable ? RK3506_GMAC_CLK_RMII_NOGATE :

			  RK3506_GMAC_CLK_RMII_GATE;

	regmap_write(bsp_priv->grf, offset, value);

}



static const struct rk_gmac_ops rk3506_ops = {

	.set_to_rmii = rk3506_set_to_rmii,

	.set_speed = rk3506_set_speed,

	.set_clock_selection = rk3506_set_clock_selection,

	.regs_valid = true,

	.regs = {

		0xff4c8000, /* gmac0 */

		0xff4d0000, /* gmac1 */

		0x0, /* sentinel */

	},

};



#define RK3528_VO_GRF_GMAC_CON		0x0018

#define RK3528_VO_GRF_MACPHY_CON0	0x001c

#define RK3528_VO_GRF_MACPHY_CON1	0x0020
@@ -1809,6 +1872,7 @@ 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,rk3506-gmac", .data = &rk3506_ops },

	{ .compatible = "rockchip,rk3528-gmac", .data = &rk3528_ops },

	{ .compatible = "rockchip,rk3568-gmac", .data = &rk3568_ops },

	{ .compatible = "rockchip,rk3576-gmac", .data = &rk3576_ops },