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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: Tobias Schramm <t.schramm@manjaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tobias Schramm 2021-05-14 13:38:12 +02:00 committed by David S. Miller
parent 2cc8c910f5
commit b4ac94565c
1 changed files with 49 additions and 0 deletions
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49
drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
View File

@ -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 },