[U-Boot] [PATCH 06/10] net: gmac_rk3288: Add RK3288 GMAC driver

Sjoerd Simons sjoerd.simons at collabora.co.uk
Thu Oct 1 11:48:09 CEST 2015


Add a new driver for the GMAC ethernet interface present in Rockchip
RK3288 SOCs. This driver subclasses the generic design-ware driver to
add the glue needed specifically for Rockchip.

Signed-off-by: Sjoerd Simons <sjoerd.simons at collabora.co.uk>
---

 drivers/net/Kconfig       |   7 +++
 drivers/net/Makefile      |   1 +
 drivers/net/gmac_rk3288.c | 140 ++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 148 insertions(+)
 create mode 100644 drivers/net/gmac_rk3288.c

diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index bbec6a6..312c660 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -92,4 +92,11 @@ config PCH_GBE
 	  This MAC is present in Intel Platform Controller Hub EG20T. It
 	  supports 10/100/1000 Mbps operation.
 
+config GMAC_RK3288
+	bool "Rockchip RK3288 Synopsys Designware Ethernet MAC"
+	depends on DM_ETH && ETH_DESIGNWARE
+	help
+	  This driver provides Rockchip RK3288 network support based on the
+	  Synopsys Designware driver.
+
 endif # NETDEVICES
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index 150470c..f0a3992 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -32,6 +32,7 @@ obj-$(CONFIG_FTGMAC100) += ftgmac100.o
 obj-$(CONFIG_FTMAC110) += ftmac110.o
 obj-$(CONFIG_FTMAC100) += ftmac100.o
 obj-$(CONFIG_GRETH) += greth.o
+obj-$(CONFIG_GMAC_RK3288) += gmac_rk3288.o
 obj-$(CONFIG_DRIVER_TI_KEYSTONE_NET) += keystone_net.o
 obj-$(CONFIG_KS8851_MLL) += ks8851_mll.o
 obj-$(CONFIG_LAN91C96) += lan91c96.o
diff --git a/drivers/net/gmac_rk3288.c b/drivers/net/gmac_rk3288.c
new file mode 100644
index 0000000..6e92c8e
--- /dev/null
+++ b/drivers/net/gmac_rk3288.c
@@ -0,0 +1,140 @@
+/*
+ * (C) Copyright 2015 Sjoerd Simons <sjoerd.simons at collabora.co.uk>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+/*
+ * Rockchip GMAC ethernet IP driver for U-Boot
+ */
+#include <common.h>
+#include <dm.h>
+#include <dm/pinctrl.h>
+#include <asm/gpio.h>
+#include <clk.h>
+#include <phy.h>
+#include <syscon.h>
+#include <asm/io.h>
+#include <asm/arch/periph.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/grf_rk3288.h>
+#include "designware.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct gmac_rk3288_platdata {
+	struct dw_eth_pdata dw_eth_pdata;
+	int tx_delay;
+	int rx_delay;
+};
+
+static int gmac_rk3288_ofdata_to_platdata(struct udevice *dev)
+{
+	struct gmac_rk3288_platdata *pdata = dev_get_platdata(dev);
+
+	pdata->tx_delay = fdtdec_get_int (gd->fdt_blob, dev->of_offset,
+		"tx_delay", 0x30);
+	pdata->rx_delay = fdtdec_get_int (gd->fdt_blob, dev->of_offset,
+		"rx_delay", 0x10);
+
+	return designware_eth_ofdata_to_platdata(dev);
+}
+
+static int gmac_rk3288_started(struct udevice *dev)
+{
+	struct rk3288_grf *grf;
+	struct dw_eth_dev *priv = dev_get_priv(dev);
+	int clk;
+
+	switch (priv->phydev->speed) {
+	case 10:
+		clk = GMAC_CLK_SEL_2_5M;
+		break;
+	case 100:
+		clk = GMAC_CLK_SEL_25M;
+		break;
+	case 1000:
+		clk = GMAC_CLK_SEL_125M;
+		break;
+	default:
+		printf("Unknown phy speed: %d\n", priv->phydev->speed);
+		return -EINVAL;
+	}
+
+	grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
+
+	rk_clrsetreg(&grf->soc_con1,
+		     GMAC_CLK_SEL_MASK << GMAC_CLK_SEL_SHIFT,
+		     clk << GMAC_CLK_SEL_SHIFT);
+
+	return 0;
+}
+
+static int gmac_rk3288_probe(struct udevice *dev)
+{
+	int ret;
+	struct gmac_rk3288_platdata *pdata = dev_get_platdata(dev);
+	struct dw_eth_dev *priv = dev_get_priv(dev);
+	enum periph_id periph_id;
+	struct udevice *pinctrl, *clk;
+	struct rk3288_grf *grf;
+
+	ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
+	if (ret)
+		return ret;
+
+	ret  = pinctrl_get_periph_id(pinctrl, dev);
+	if (ret < 0)
+		return ret;
+
+	periph_id = ret;
+	ret = pinctrl_request(pinctrl, periph_id, 0);
+	if (ret)
+		return ret;
+
+	ret = uclass_get_device(UCLASS_CLK, CLK_GENERAL, &clk);
+	if (ret)
+		return ret;
+
+	ret = clk_set_periph_rate(clk, periph_id, 0);
+	if (ret)
+		return ret;
+
+	/* Set to RGMII mode */
+	grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
+	rk_clrsetreg(&grf->soc_con1,
+		     RMII_MODE_MASK << RMII_MODE_SHIFT |
+		     GMAC_PHY_INTF_SEL_MASK << GMAC_PHY_INTF_SEL_SHIFT,
+		     GMAC_PHY_INTF_SEL_RGMII << GMAC_PHY_INTF_SEL_SHIFT);
+
+	rk_clrsetreg(&grf->soc_con3,
+		     RXCLK_DLY_ENA_GMAC_MASK <<  RXCLK_DLY_ENA_GMAC_SHIFT |
+		     TXCLK_DLY_ENA_GMAC_MASK <<  TXCLK_DLY_ENA_GMAC_SHIFT |
+		     CLK_RX_DL_CFG_GMAC_MASK <<  CLK_RX_DL_CFG_GMAC_SHIFT |
+		     CLK_TX_DL_CFG_GMAC_MASK <<  CLK_TX_DL_CFG_GMAC_SHIFT,
+		     RXCLK_DLY_ENA_GMAC_ENABLE << RXCLK_DLY_ENA_GMAC_SHIFT |
+		     TXCLK_DLY_ENA_GMAC_ENABLE << TXCLK_DLY_ENA_GMAC_SHIFT |
+		     pdata->rx_delay << CLK_RX_DL_CFG_GMAC_SHIFT |
+		     pdata->tx_delay << CLK_TX_DL_CFG_GMAC_SHIFT);
+
+	priv->started = gmac_rk3288_started;
+
+	return designware_eth_probe(dev);
+}
+
+static const struct udevice_id rk3288_gmac_ids[] = {
+	{ .compatible = "rockchip,rk3288-gmac" },
+	{ }
+};
+
+U_BOOT_DRIVER(eth_gmac_rk3288) = {
+	.name	= "gmac_rk3288",
+	.id	= UCLASS_ETH,
+	.of_match = rk3288_gmac_ids,
+	.ofdata_to_platdata = gmac_rk3288_ofdata_to_platdata,
+	.probe	= gmac_rk3288_probe,
+	.ops	= &designware_eth_ops,
+	.priv_auto_alloc_size = sizeof(struct dw_eth_dev),
+	.platdata_auto_alloc_size = sizeof(struct gmac_rk3288_platdata),
+.flags = DM_FLAG_ALLOC_PRIV_DMA,
+};
-- 
2.5.3



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