The Designware MAC on the StarFive jh7100 needs some special speed
configuration. Match against a new starfive,stmmac compatible that
describes that.
Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
---
drivers/net/Kconfig | 8 +++
drivers/net/Makefile | 1 +
drivers/net/designware.c | 7 +-
drivers/net/designware.h | 1 +
drivers/net/designware_starfive.c | 109 ++++++++++++++++++++++++++++++
include/soc/starfive/sysmain.h | 15 ++++
6 files changed, 138 insertions(+), 3 deletions(-)
create mode 100644 drivers/net/designware_starfive.c
create mode 100644 include/soc/starfive/sysmain.h
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 0d55ea7a3b60..ed018dbf9a67 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -82,6 +82,14 @@ config DRIVER_NET_DESIGNWARE_SOCFPGA
This option enables support for the Synopsys
Designware Core Univesal MAC 10M/100M/1G ethernet IP on SoCFPGA.
+config DRIVER_NET_DESIGNWARE_STARFIVE
+ bool "Designware Universal MAC ethernet driver for StarFive platforms"
+ depends on SOC_STARFIVE || COMPILE_TEST
+ select MFD_SYSCON
+ help
+ This option enables support for the Synopsys
+ Designware Core Univesal MAC 10M/100M/1G ethernet IP on StarFive.
+
endif
config DRIVER_NET_DESIGNWARE_EQOS
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index 656d45a868a5..0ce310de05c2 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -11,6 +11,7 @@ obj-$(CONFIG_DRIVER_NET_DAVINCI_EMAC) += davinci_emac.o
obj-$(CONFIG_DRIVER_NET_DESIGNWARE) += designware.o
obj-$(CONFIG_DRIVER_NET_DESIGNWARE_GENERIC) += designware_generic.o
obj-$(CONFIG_DRIVER_NET_DESIGNWARE_SOCFPGA) += designware_socfpga.o
+obj-$(CONFIG_DRIVER_NET_DESIGNWARE_STARFIVE) += designware_starfive.o
obj-$(CONFIG_DRIVER_NET_DESIGNWARE_EQOS) += designware_eqos.o
obj-$(CONFIG_DRIVER_NET_DESIGNWARE_STM32) += designware_stm32.o
obj-$(CONFIG_DRIVER_NET_DESIGNWARE_TEGRA186) += designware_tegra186.o
diff --git a/drivers/net/designware.c b/drivers/net/designware.c
index 0ee6d3d78ac7..e815d74ce9b8 100644
--- a/drivers/net/designware.c
+++ b/drivers/net/designware.c
@@ -457,11 +457,12 @@ struct dw_eth_dev *dwc_drv_probe(struct device_d *dev)
if (ret)
return ERR_PTR(ret);
- if (drvdata && drvdata->enh_desc)
+ if (drvdata) {
priv->enh_desc = drvdata->enh_desc;
- else
+ priv->fix_mac_speed = drvdata->fix_mac_speed;
+ } else {
dev_warn(dev, "No drvdata specified\n");
-
+ }
if (pdata) {
priv->phy_addr = pdata->phy_addr;
diff --git a/drivers/net/designware.h b/drivers/net/designware.h
index 0a6a6bf1a497..ef3705b1e387 100644
--- a/drivers/net/designware.h
+++ b/drivers/net/designware.h
@@ -35,6 +35,7 @@ struct dw_eth_dev {
struct dw_eth_drvdata {
bool enh_desc;
+ void (*fix_mac_speed)(int speed);
void *priv;
};
diff --git a/drivers/net/designware_starfive.c b/drivers/net/designware_starfive.c
new file mode 100644
index 000000000000..e7e3fe5fb364
--- /dev/null
+++ b/drivers/net/designware_starfive.c
@@ -0,0 +1,109 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2021 Ahmad Fatoum, Pengutronix
+ */
+
+#include <common.h>
+#include <init.h>
+#include <linux/reset.h>
+#include <linux/clk.h>
+#include <mfd/syscon.h>
+#include <soc/starfive/sysmain.h>
+#include "designware.h"
+
+/*
+ * GMAC_GTXCLK
+ * bit name access default description
+ * [31] _gmac_gtxclk enable RW 0x0 "1:enable; 0:disable"
+ * [30] reserved - 0x0 reserved
+ * [29:8] reserved - 0x0 reserved
+ * [7:0] gmac_gtxclk ratio RW 0x4 divider value
+ *
+ * 1000M: gtxclk@125M => 500/125 = 0x4
+ * 100M: gtxclk@25M => 500/25 = 0x14
+ * 10M: gtxclk@2.5M => 500/2.5 = 0xc8
+ */
+
+#define CLKGEN_BASE 0x11800000
+#define CLKGEN_GMAC_GTXCLK_OFFSET 0x1EC
+#define CLKGEN_GMAC_GTXCLK_ADDR (CLKGEN_BASE + CLKGEN_GMAC_GTXCLK_OFFSET)
+
+
+#define CLKGEN_125M_DIV 0x4
+#define CLKGEN_25M_DIV 0x14
+#define CLKGEN_2_5M_DIV 0xc8
+
+static void dwmac_fixed_speed(int speed)
+{
+ /* TODO: move this into clk driver */
+ void __iomem *addr = IOMEM(CLKGEN_GMAC_GTXCLK_ADDR);
+ u32 value;
+
+ value = readl(addr) & (~0x000000FF);
+
+ switch (speed) {
+ case SPEED_1000: value |= CLKGEN_125M_DIV; break;
+ case SPEED_100: value |= CLKGEN_25M_DIV; break;
+ case SPEED_10: value |= CLKGEN_2_5M_DIV; break;
+ default: return;
+ }
+
+ writel(value, addr);
+}
+
+static struct dw_eth_drvdata starfive_drvdata = {
+ .enh_desc = 1,
+ .fix_mac_speed = dwmac_fixed_speed,
+};
+
+static int starfive_dwc_ether_probe(struct device_d *dev)
+{
+ struct dw_eth_dev *dwc;
+ struct regmap *regmap;
+ int ret;
+ struct clk_bulk_data clks[] = {
+ { .id = "ptp_ref" },
+ { .id = "tx" },
+ };
+
+ regmap = syscon_regmap_lookup_by_phandle(dev->device_node, "starfive,sysmain");
+ if (IS_ERR(regmap)) {
+ dev_err(dev, "Could not get starfive,sysmain node\n");
+ return PTR_ERR(regmap);
+ }
+
+ ret = clk_bulk_get(dev, ARRAY_SIZE(clks), clks);
+ if (ret)
+ return ret;
+
+ ret = clk_bulk_enable(ARRAY_SIZE(clks), clks);
+ if (ret < 0)
+ return ret;
+
+ ret = device_reset(dev);
+ if (ret)
+ return ret;
+
+ dwc = dwc_drv_probe(dev);
+ if (IS_ERR(dwc))
+ return PTR_ERR(dwc);
+
+ if (phy_interface_mode_is_rgmii(dwc->interface)) {
+ regmap_update_bits(regmap, SYSMAIN_GMAC_PHY_INTF_SEL, 0x7, 0x1);
+ regmap_write(regmap, SYSMAIN_GMAC_GTXCLK_DLYCHAIN_SEL, 0x4);
+ }
+
+ return 0;
+}
+
+static struct of_device_id starfive_dwc_ether_compatible[] = {
+ { .compatible = "starfive,stmmac", .data = &starfive_drvdata },
+ { /* sentinel */ }
+};
+
+static struct driver_d starfive_dwc_ether_driver = {
+ .name = "starfive-designware_eth",
+ .probe = starfive_dwc_ether_probe,
+ .of_compatible = starfive_dwc_ether_compatible,
+};
+device_platform_driver(starfive_dwc_ether_driver);
diff --git a/include/soc/starfive/sysmain.h b/include/soc/starfive/sysmain.h
new file mode 100644
index 000000000000..b58f8d9825fd
--- /dev/null
+++ b/include/soc/starfive/sysmain.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef _STARFIVE_SYSMAIN_H_
+#define _STARFIVE_SYSMAIN_H_
+
+#define SYSMAIN_PLL0_REG 0x00
+#define SYSMAIN_PLL1_REG 0x04
+#define SYSMAIN_PLL2_REG 0x08
+#define SYSMAIN_PLLS_STAT 0x0c
+
+#define SYSMAIN_GMAC_PHY_INTF_SEL 0x70
+#define SYSMAIN_GMAC_GTXCLK_DLYCHAIN_SEL 0xC8
+
+
+#endif //_SYSCON_SYSMAIN_CTRL_MACRO_H_
--
2.29.2
_______________________________________________
barebox mailing list
barebox@xxxxxxxxxxxxxxxxxxx
http://lists.infradead.org/mailman/listinfo/barebox
