[U-Boot] [PATCH v4 5/9] net: gmac_rk3288: Add RK3288 GMAC driver
Simon Glass
sjg at chromium.org
Sat Dec 3 06:06:08 CET 2016
From: Sjoerd Simons <sjoerd.simons at collabora.co.uk>
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>
Signed-off-by: Simon Glass <sjg at chromium.org>
Acked-by: Joe Hershberger <joe.hershberger at ni.com>
---
Changes in v4: None
Changes in v3:
- Add comments for struct gmac_rk3288_platdata
- Adjust binding to use r/tx-delay instead of r/tx_delay
- Sort includes
- Use debug() instead of printf() for error
- Use function calls instead of fix_mac_speed() hook
- Use new clk interface
Changes in v2:
- Adjust to new hook name
- Fix various coding style nits
drivers/net/Kconfig | 7 +++
drivers/net/Makefile | 1 +
drivers/net/gmac_rk3288.c | 154 ++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 162 insertions(+)
create mode 100644 drivers/net/gmac_rk3288.c
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index f25d3ff..0027a2e 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -215,4 +215,11 @@ config PIC32_ETH
This driver implements 10/100 Mbps Ethernet and MAC layer for
Microchip PIC32 microcontrollers.
+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 9a7bfc6..348e98b 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -34,6 +34,7 @@ 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..0c22756
--- /dev/null
+++ b/drivers/net/gmac_rk3288.c
@@ -0,0 +1,154 @@
+/*
+ * (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 <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 <dm/pinctrl.h>
+#include <dt-bindings/clock/rk3288-cru.h>
+#include "designware.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/*
+ * Platform data for the gmac
+ *
+ * dw_eth_pdata: Required platform data for designware driver (must be first)
+ */
+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_fix_mac_speed(struct dw_eth_dev *priv)
+{
+ struct rk3288_grf *grf;
+ 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:
+ debug("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)
+{
+ struct gmac_rk3288_platdata *pdata = dev_get_platdata(dev);
+ struct rk3288_grf *grf;
+ struct clk clk;
+ int ret;
+
+ ret = clk_get_by_index(dev, 0, &clk);
+ if (ret)
+ return ret;
+
+ /* Since mac_clk is fed by an external clock we can use 0 here */
+ ret = clk_set_rate(&clk, 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);
+
+ return designware_eth_probe(dev);
+}
+
+static int gmac_rk3288_eth_start(struct udevice *dev)
+{
+ struct eth_pdata *pdata = dev_get_platdata(dev);
+ struct dw_eth_dev *priv = dev_get_priv(dev);
+ int ret;
+
+ ret = designware_eth_init(priv, pdata->enetaddr);
+ if (ret)
+ return ret;
+ ret = gmac_rk3288_fix_mac_speed(priv);
+ if (ret)
+ return ret;
+ ret = designware_eth_enable(priv);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+const struct eth_ops gmac_rk3288_eth_ops = {
+ .start = gmac_rk3288_eth_start,
+ .send = designware_eth_send,
+ .recv = designware_eth_recv,
+ .free_pkt = designware_eth_free_pkt,
+ .stop = designware_eth_stop,
+ .write_hwaddr = designware_eth_write_hwaddr,
+};
+
+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 = &gmac_rk3288_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,
+};
--
2.8.0.rc3.226.g39d4020
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