Barebox-version of the Linux v5.2 patch:
40ae25505fe834648ce4aa70b073ee934942bfdb
net: stmmac: socfpga: fix phy and ptp_ref setup for Arria10/Stratix10
On the Arria10, Agilex, and Stratix10 SoC, there are a few differences from
the Cyclone5 and Arria5:
- The emac PHY setup bits are in separate registers.
- The PTP reference clock select mask is different.
- The register to enable the emac signal from FPGA is different.
Thus, this patch creates a separate function for setting the phy modes on
Arria10/Agilex/Stratix10. The separation is based a new DTS binding:
"altr,socfpga-stmmac-a10-s10".
Signed-off-by: Dinh Nguyen <dinguyen@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
The new DTS binding is already part of v2019.10.0 and the driver doesn't
probe on Arria10 without the new binding introduced in this patch.
Signed-off-by: Steffen Trumtrar <s.trumtrar@xxxxxxxxxxxxxx>
---
drivers/net/designware.h | 1 +
drivers/net/designware_socfpga.c | 133 +++++++++++++++++++++++++++----
2 files changed, 118 insertions(+), 16 deletions(-)
diff --git a/drivers/net/designware.h b/drivers/net/designware.h
index 305f674bf064..0a6a6bf1a497 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 *priv;
};
struct dw_eth_dev *dwc_drv_probe(struct device_d *dev);
diff --git a/drivers/net/designware_socfpga.c b/drivers/net/designware_socfpga.c
index 77157c2b511f..ce3ac38ebe87 100644
--- a/drivers/net/designware_socfpga.c
+++ b/drivers/net/designware_socfpga.c
@@ -14,11 +14,27 @@
#include <net.h>
#include <of_net.h>
#include <linux/reset.h>
-#include <mach/cyclone5-system-manager.h>
#include <mfd/syscon.h>
#include "designware.h"
-#define SYSMGR_EMACGRP_CTRL_PTP_REF_CLK_MASK 0x00000010
+#define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_GMII_MII 0x0
+#define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RGMII 0x1
+#define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RMII 0x2
+#define SYSMGR_EMACGRP_CTRL_PHYSEL0_LSB 0
+#define SYSMGR_EMACGRP_CTRL_PHYSEL1_LSB 2
+#define SYSMGR_EMACGRP_CTRL_PHYSEL_MASK 0x00000003
+#define SYSMGR_EMACGRP_CTRL_PTP_REF_CLK_MASK 0x00000010
+#define SYSMGR_GEN10_EMACGRP_CTRL_PTP_REF_CLK_MASK 0x00000100
+
+#define SYSMGR_FPGAGRP_MODULE 0x00000028
+#define SYSMGR_FPGAGRP_MODULE_EMAC 0x00000004
+#define SYSMGR_FPGAINTF_EMAC_REG 0x00000070
+#define SYSMGR_FPGAINTF_EMAC_BIT 0x1
+
+struct socfpga_dwc_dev;
+struct socfpga_dwmac_ops {
+ int (*set_phy_mode)(struct socfpga_dwc_dev *dwmac_priv);
+};
struct socfpga_dwc_dev {
struct dw_eth_dev *priv;
@@ -26,27 +42,36 @@ struct socfpga_dwc_dev {
u32 reg_shift;
void __iomem *sys_mgr_base;
bool f2h_ptp_ref_clk;
+ const struct socfpga_dwmac_ops *ops;
};
-static int socfpga_dwc_set_phy_mode(struct socfpga_dwc_dev *dwc_dev)
+static int socfpga_set_phy_mode_common(int phymode, u32 *val)
{
- struct dw_eth_dev *eth_dev = dwc_dev->priv;
- int phymode = eth_dev->interface;
- u32 reg_offset = dwc_dev->reg_offset;
- u32 reg_shift = dwc_dev->reg_shift;
- u32 ctrl, val;
-
switch (phymode) {
case PHY_INTERFACE_MODE_RGMII:
case PHY_INTERFACE_MODE_RGMII_ID:
- val = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RGMII;
+ *val = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RGMII;
break;
case PHY_INTERFACE_MODE_MII:
case PHY_INTERFACE_MODE_GMII:
case PHY_INTERFACE_MODE_SGMII:
- val = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_GMII_MII;
+ *val = SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_GMII_MII;
break;
default:
+ return -EINVAL;
+ }
+ return 0;
+};
+
+static int socfpga_gen5_set_phy_mode(struct socfpga_dwc_dev *dwc_dev)
+{
+ struct dw_eth_dev *eth_dev = dwc_dev->priv;
+ int phymode = eth_dev->interface;
+ u32 reg_offset = dwc_dev->reg_offset;
+ u32 reg_shift = dwc_dev->reg_shift;
+ u32 ctrl, val;
+
+ if (socfpga_set_phy_mode_common(phymode, &val)) {
dev_err(ð_dev->netdev.dev, "bad phy mode %d\n", phymode);
return -EINVAL;
}
@@ -85,6 +110,54 @@ static int socfpga_dwc_set_phy_mode(struct socfpga_dwc_dev *dwc_dev)
return 0;
}
+static int socfpga_gen10_set_phy_mode(struct socfpga_dwc_dev *dwc_dev)
+{
+ struct dw_eth_dev *eth_dev = dwc_dev->priv;
+ int phymode = eth_dev->interface;
+ u32 reg_offset = dwc_dev->reg_offset;
+ u32 reg_shift = dwc_dev->reg_shift;
+ u32 ctrl, val;
+
+ if (socfpga_set_phy_mode_common(phymode, &val)) {
+ dev_err(ð_dev->netdev.dev, "bad phy mode %d\n", phymode);
+ return -EINVAL;
+ }
+
+ /* Assert reset to the enet controller before changing the phy mode */
+ if (eth_dev->rst)
+ reset_control_assert(eth_dev->rst);
+
+ ctrl = readl(dwc_dev->sys_mgr_base + reg_offset);
+ ctrl &= ~(SYSMGR_EMACGRP_CTRL_PHYSEL_MASK << reg_shift);
+ ctrl |= val << reg_shift;
+
+ if (dwc_dev->f2h_ptp_ref_clk ||
+ phymode == PHY_INTERFACE_MODE_MII ||
+ phymode == PHY_INTERFACE_MODE_GMII ||
+ phymode == PHY_INTERFACE_MODE_SGMII) {
+ u32 module;
+
+ ctrl |= SYSMGR_GEN10_EMACGRP_CTRL_PTP_REF_CLK_MASK;
+ module = readl(dwc_dev->sys_mgr_base + SYSMGR_FPGAINTF_EMAC_REG);
+ module |= (SYSMGR_FPGAINTF_EMAC_BIT << reg_shift);
+
+ writel(module, dwc_dev->sys_mgr_base + SYSMGR_FPGAINTF_EMAC_REG);
+ } else {
+ ctrl &= ~SYSMGR_GEN10_EMACGRP_CTRL_PTP_REF_CLK_MASK;
+ }
+
+ writel(ctrl, dwc_dev->sys_mgr_base + reg_offset);
+
+ /* Deassert reset for the phy configuration to be sampled by
+ * the enet controller, and operation to start in requested mode
+ */
+ if (eth_dev->rst)
+ reset_control_deassert(eth_dev->rst);
+
+ return 0;
+}
+
+
static int socfpga_dwc_probe_dt(struct device_d *dev, struct socfpga_dwc_dev *priv)
{
u32 reg_offset, reg_shift;
@@ -120,11 +193,21 @@ static int socfpga_dwc_ether_probe(struct device_d *dev)
{
struct socfpga_dwc_dev *dwc_dev;
struct dw_eth_dev *priv;
+ struct dw_eth_drvdata *drvdata;
int ret;
dwc_dev = xzalloc(sizeof(*dwc_dev));
- priv = dwc_drv_probe(dev);
+ ret = dev_get_drvdata(dev, (const void **)&drvdata);
+ if (ret)
+ return ret;
+
+ if (drvdata && drvdata->priv)
+ dwc_dev->ops = (struct socfpga_dwmac_ops *)drvdata->priv;
+ else
+ return -EINVAL;
+
+ priv = dwc_drv_probe(dev);
if (IS_ERR(priv))
return PTR_ERR(priv);
@@ -145,18 +228,36 @@ static int socfpga_dwc_ether_probe(struct device_d *dev)
if (ret)
return ret;
- return socfpga_dwc_set_phy_mode(dwc_dev);
+ return dwc_dev->ops->set_phy_mode(dwc_dev);
}
-static struct dw_eth_drvdata socfpga_stmmac_drvdata = {
+static struct socfpga_dwmac_ops socfpga_gen5_ops = {
+ .set_phy_mode = socfpga_gen5_set_phy_mode,
+};
+
+static const struct dw_eth_drvdata socfpga_gen5_drvdata = {
.enh_desc = 1,
+ .priv = &socfpga_gen5_ops,
+};
+
+static struct socfpga_dwmac_ops socfpga_gen10_ops = {
+ .set_phy_mode = socfpga_gen10_set_phy_mode,
+};
+static const struct dw_eth_drvdata socfpga_gen10_drvdata = {
+ .enh_desc = 1,
+ .priv = &socfpga_gen10_ops,
};
static __maybe_unused struct of_device_id socfpga_dwc_ether_compatible[] = {
{
.compatible = "altr,socfpga-stmmac",
- .data = &socfpga_stmmac_drvdata,
- }, {
+ .data = &socfpga_gen5_drvdata,
+ },
+ {
+ .compatible = "altr,socfpga-stmmac-a10-s10",
+ .data = &socfpga_gen10_drvdata,
+ },
+ {
/* sentinel */
}
};
--
2.23.0
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