rockchip: rk3288: Add pinctrl support for the gmac ethernet interface

Add support for the gmac ethernet interface to pinctrl. This hardcodes
the setup to match that of the firefly and Radxa Rock2 boards, using the
RGMII phy mode for gmac interface and GPIO4B0 as the phy reset GPIO.

Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Romain Perier <romain.perier@collabora.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>

1 files changed, 118 insertions, 0 deletions

diff --git a/drivers/pinctrl/rockchip/pinctrl_rk3288.c b/drivers/pinctrl/rockchip/pinctrl_rk3288.c
index de5e8343e5..3c9ae974f4 100644
--- a/drivers/pinctrl/rockchip/pinctrl_rk3288.c
+++ b/drivers/pinctrl/rockchip/pinctrl_rk3288.c
@@ -402,6 +402,119 @@ static void pinctrl_rk3288_sdmmc_config(struct rk3288_grf *grf, int mmc_id)
 	}
 }
 
+static void pinctrl_rk3288_gmac_config(struct rk3288_grf *grf, int gmac_id)
+{
+	switch (gmac_id) {
+	case PERIPH_ID_GMAC:
+		rk_clrsetreg(&grf->gpio3dl_iomux,
+			     GPIO3D3_MASK << GPIO3D3_SHIFT |
+			     GPIO3D2_MASK << GPIO3D2_SHIFT |
+			     GPIO3D2_MASK << GPIO3D1_SHIFT |
+			     GPIO3D0_MASK << GPIO3D0_SHIFT,
+			     GPIO3D3_MAC_RXD3 << GPIO3D3_SHIFT |
+			     GPIO3D2_MAC_RXD2 << GPIO3D2_SHIFT |
+			     GPIO3D1_MAC_TXD3 << GPIO3D1_SHIFT |
+			     GPIO3D0_MAC_TXD2 << GPIO3D0_SHIFT);
+
+		rk_clrsetreg(&grf->gpio3dh_iomux,
+			     GPIO3D7_MASK << GPIO3D7_SHIFT |
+			     GPIO3D6_MASK << GPIO3D6_SHIFT |
+			     GPIO3D5_MASK << GPIO3D5_SHIFT |
+			     GPIO3D4_MASK << GPIO3D4_SHIFT,
+			     GPIO3D7_MAC_RXD1 << GPIO3D7_SHIFT |
+			     GPIO3D6_MAC_RXD0 << GPIO3D6_SHIFT |
+			     GPIO3D5_MAC_TXD1 << GPIO3D5_SHIFT |
+			     GPIO3D4_MAC_TXD0 << GPIO3D4_SHIFT);
+
+		/* switch the Tx pins to 12ma drive-strength */
+		rk_clrsetreg(&grf->gpio1_e[2][3],
+			     GPIO_BIAS_MASK |
+			     (GPIO_BIAS_MASK << GPIO_BIAS_SHIFT(1)) |
+			     (GPIO_BIAS_MASK << GPIO_BIAS_SHIFT(4)) |
+			     (GPIO_BIAS_MASK << GPIO_BIAS_SHIFT(5)),
+			     (GPIO_BIAS_12MA << GPIO_BIAS_SHIFT(0)) |
+			     (GPIO_BIAS_12MA << GPIO_BIAS_SHIFT(1)) |
+			     (GPIO_BIAS_12MA << GPIO_BIAS_SHIFT(4)) |
+			     (GPIO_BIAS_12MA << GPIO_BIAS_SHIFT(5)));
+
+		/* Set normal pull for all GPIO3D pins */
+		rk_clrsetreg(&grf->gpio1_p[2][3],
+			     (GPIO_PULL_MASK << GPIO_PULL_SHIFT(0)) |
+			     (GPIO_PULL_MASK << GPIO_PULL_SHIFT(1)) |
+			     (GPIO_PULL_MASK << GPIO_PULL_SHIFT(2)) |
+			     (GPIO_PULL_MASK << GPIO_PULL_SHIFT(3)) |
+			     (GPIO_PULL_MASK << GPIO_PULL_SHIFT(4)) |
+			     (GPIO_PULL_MASK << GPIO_PULL_SHIFT(5)) |
+			     (GPIO_PULL_MASK << GPIO_PULL_SHIFT(5)) |
+			     (GPIO_PULL_MASK << GPIO_PULL_SHIFT(7)),
+			     (GPIO_PULL_NORMAL << GPIO_PULL_SHIFT(0)) |
+			     (GPIO_PULL_NORMAL << GPIO_PULL_SHIFT(1)) |
+			     (GPIO_PULL_NORMAL << GPIO_PULL_SHIFT(2)) |
+			     (GPIO_PULL_NORMAL << GPIO_PULL_SHIFT(3)) |
+			     (GPIO_PULL_NORMAL << GPIO_PULL_SHIFT(4)) |
+			     (GPIO_PULL_NORMAL << GPIO_PULL_SHIFT(5)) |
+			     (GPIO_PULL_NORMAL << GPIO_PULL_SHIFT(6)) |
+			     (GPIO_PULL_NORMAL << GPIO_PULL_SHIFT(7)));
+
+		rk_clrsetreg(&grf->gpio4al_iomux,
+			     GPIO4A3_MASK << GPIO4A3_SHIFT |
+			     GPIO4A1_MASK << GPIO4A1_SHIFT |
+			     GPIO4A0_MASK << GPIO4A0_SHIFT,
+			     GPIO4A3_MAC_CLK << GPIO4A3_SHIFT |
+			     GPIO4A1_MAC_TXDV << GPIO4A1_SHIFT |
+			     GPIO4A0_MAC_MDC << GPIO4A0_SHIFT);
+
+		rk_clrsetreg(&grf->gpio4ah_iomux,
+			     GPIO4A6_MASK << GPIO4A6_SHIFT |
+			     GPIO4A5_MASK << GPIO4A5_SHIFT |
+			     GPIO4A4_MASK << GPIO4A4_SHIFT,
+			     GPIO4A6_MAC_RXCLK << GPIO4A6_SHIFT |
+			     GPIO4A5_MAC_MDIO << GPIO4A5_SHIFT |
+			     GPIO4A4_MAC_TXEN << GPIO4A4_SHIFT);
+
+		/* switch GPIO4A4 to 12ma drive-strength */
+		rk_clrsetreg(&grf->gpio1_e[3][0],
+			     GPIO_BIAS_MASK << GPIO_BIAS_SHIFT(4),
+			     GPIO_BIAS_12MA << GPIO_BIAS_SHIFT(4));
+
+		/* Set normal pull for all GPIO4A pins */
+		rk_clrsetreg(&grf->gpio1_p[3][0],
+			     (GPIO_PULL_MASK << GPIO_PULL_SHIFT(0)) |
+			     (GPIO_PULL_MASK << GPIO_PULL_SHIFT(1)) |
+			     (GPIO_PULL_MASK << GPIO_PULL_SHIFT(2)) |
+			     (GPIO_PULL_MASK << GPIO_PULL_SHIFT(3)) |
+			     (GPIO_PULL_MASK << GPIO_PULL_SHIFT(4)) |
+			     (GPIO_PULL_MASK << GPIO_PULL_SHIFT(5)) |
+			     (GPIO_PULL_MASK << GPIO_PULL_SHIFT(5)) |
+			     (GPIO_PULL_MASK << GPIO_PULL_SHIFT(7)),
+			     (GPIO_PULL_NORMAL << GPIO_PULL_SHIFT(0)) |
+			     (GPIO_PULL_NORMAL << GPIO_PULL_SHIFT(1)) |
+			     (GPIO_PULL_NORMAL << GPIO_PULL_SHIFT(2)) |
+			     (GPIO_PULL_NORMAL << GPIO_PULL_SHIFT(3)) |
+			     (GPIO_PULL_NORMAL << GPIO_PULL_SHIFT(4)) |
+			     (GPIO_PULL_NORMAL << GPIO_PULL_SHIFT(5)) |
+			     (GPIO_PULL_NORMAL << GPIO_PULL_SHIFT(6)) |
+			     (GPIO_PULL_NORMAL << GPIO_PULL_SHIFT(7)));
+
+		/* switch GPIO4B1 to 12ma drive-strength */
+		rk_clrsetreg(&grf->gpio1_e[3][1],
+			     GPIO_BIAS_MASK << GPIO_BIAS_SHIFT(1),
+			     GPIO_BIAS_12MA << GPIO_BIAS_SHIFT(1));
+
+		/* Set pull normal for GPIO4B1, pull up for GPIO4B0 */
+		rk_clrsetreg(&grf->gpio1_p[3][1],
+			     (GPIO_PULL_MASK << GPIO_PULL_SHIFT(0)) |
+			     (GPIO_PULL_MASK << GPIO_PULL_SHIFT(1)),
+			     (GPIO_PULL_UP << GPIO_PULL_SHIFT(0)) |
+			     (GPIO_PULL_NORMAL << GPIO_PULL_SHIFT(1)));
+
+		break;
+	default:
+		printf("gmac id = %d iomux error!\n", gmac_id);
+		break;
+	}
+}
+
 #ifndef CONFIG_SPL_BUILD
 static void pinctrl_rk3288_hdmi_config(struct rk3288_grf *grf, int hdmi_id)
 {
@@ -465,6 +578,9 @@ static int rk3288_pinctrl_request(struct udevice *dev, int func, int flags)
 	case PERIPH_ID_SDMMC1:
 		pinctrl_rk3288_sdmmc_config(priv->grf, func);
 		break;
+	case PERIPH_ID_GMAC:
+		pinctrl_rk3288_gmac_config(priv->grf, func);
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -484,6 +600,8 @@ static int rk3288_pinctrl_get_periph_id(struct udevice *dev,
 		return -EINVAL;
 
 	switch (cell[1]) {
+	case 27:
+		return PERIPH_ID_GMAC;
 	case 44:
 		return PERIPH_ID_SPI0;
 	case 45: