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Message-Id: <1488172706-29577-3-git-send-email-isubramanian@apm.com>
Date: Sun, 26 Feb 2017 21:18:22 -0800
From: Iyappan Subramanian <isubramanian@....com>
To: davem@...emloft.net, netdev@...r.kernel.org, andrew@...n.ch,
f.fainelli@...il.com, David.Laight@...lab.com
Cc: linux-arm-kernel@...ts.infradead.org, patches@....com,
kchudgar@....com, Iyappan Subramanian <isubramanian@....com>
Subject: [PATCH v2 net-next 2/6] drivers: net: xgene-v2: Add mac configuration
This patch adds functions to configure and control mac. This
patch also adds helper functions to get/set registers.
Signed-off-by: Iyappan Subramanian <isubramanian@....com>
Signed-off-by: Keyur Chudgar <kchudgar@....com>
---
drivers/net/ethernet/apm/xgene-v2/mac.c | 116 ++++++++++++++++++++++++++++++++
drivers/net/ethernet/apm/xgene-v2/mac.h | 110 ++++++++++++++++++++++++++++++
2 files changed, 226 insertions(+)
create mode 100644 drivers/net/ethernet/apm/xgene-v2/mac.c
create mode 100644 drivers/net/ethernet/apm/xgene-v2/mac.h
diff --git a/drivers/net/ethernet/apm/xgene-v2/mac.c b/drivers/net/ethernet/apm/xgene-v2/mac.c
new file mode 100644
index 0000000..9c3d32d
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene-v2/mac.c
@@ -0,0 +1,116 @@
+/*
+ * Applied Micro X-Gene SoC Ethernet v2 Driver
+ *
+ * Copyright (c) 2017, Applied Micro Circuits Corporation
+ * Author(s): Iyappan Subramanian <isubramanian@....com>
+ * Keyur Chudgar <kchudgar@....com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "main.h"
+
+void xge_mac_reset(struct xge_pdata *pdata)
+{
+ xge_wr_csr(pdata, MAC_CONFIG_1, SOFT_RESET);
+ xge_wr_csr(pdata, MAC_CONFIG_1, 0);
+}
+
+static void xge_mac_set_speed(struct xge_pdata *pdata)
+{
+ u32 icm0, icm2, ecm0, mc2;
+ u32 intf_ctrl, rgmii;
+
+ icm0 = xge_rd_csr(pdata, ICM_CONFIG0_REG_0);
+ icm2 = xge_rd_csr(pdata, ICM_CONFIG2_REG_0);
+ ecm0 = xge_rd_csr(pdata, ECM_CONFIG0_REG_0);
+ rgmii = xge_rd_csr(pdata, RGMII_REG_0);
+ mc2 = xge_rd_csr(pdata, MAC_CONFIG_2);
+ intf_ctrl = xge_rd_csr(pdata, INTERFACE_CONTROL);
+ icm2 |= CFG_WAITASYNCRD_EN;
+
+ switch (pdata->phy_speed) {
+ case SPEED_10:
+ SET_REG_BITS(&mc2, INTF_MODE, 1);
+ SET_REG_BITS(&intf_ctrl, HD_MODE, 0);
+ SET_REG_BITS(&icm0, CFG_MACMODE, 0);
+ SET_REG_BITS(&icm2, CFG_WAITASYNCRD, 500);
+ SET_REG_BIT(&rgmii, CFG_SPEED_125, 0);
+ break;
+ case SPEED_100:
+ SET_REG_BITS(&mc2, INTF_MODE, 1);
+ SET_REG_BITS(&intf_ctrl, HD_MODE, 1);
+ SET_REG_BITS(&icm0, CFG_MACMODE, 1);
+ SET_REG_BITS(&icm2, CFG_WAITASYNCRD, 80);
+ SET_REG_BIT(&rgmii, CFG_SPEED_125, 0);
+ break;
+ default:
+ SET_REG_BITS(&mc2, INTF_MODE, 2);
+ SET_REG_BITS(&intf_ctrl, HD_MODE, 2);
+ SET_REG_BITS(&icm0, CFG_MACMODE, 2);
+ SET_REG_BITS(&icm2, CFG_WAITASYNCRD, 16);
+ SET_REG_BIT(&rgmii, CFG_SPEED_125, 1);
+ break;
+ }
+
+ mc2 |= FULL_DUPLEX | CRC_EN | PAD_CRC;
+ SET_REG_BITS(&ecm0, CFG_WFIFOFULLTHR, 0x32);
+
+ xge_wr_csr(pdata, MAC_CONFIG_2, mc2);
+ xge_wr_csr(pdata, INTERFACE_CONTROL, intf_ctrl);
+ xge_wr_csr(pdata, RGMII_REG_0, rgmii);
+ xge_wr_csr(pdata, ICM_CONFIG0_REG_0, icm0);
+ xge_wr_csr(pdata, ICM_CONFIG2_REG_0, icm2);
+ xge_wr_csr(pdata, ECM_CONFIG0_REG_0, ecm0);
+}
+
+void xge_mac_set_station_addr(struct xge_pdata *pdata)
+{
+ u32 addr0, addr1;
+ u8 *dev_addr = pdata->ndev->dev_addr;
+
+ addr0 = (dev_addr[3] << 24) | (dev_addr[2] << 16) |
+ (dev_addr[1] << 8) | dev_addr[0];
+ addr1 = (dev_addr[5] << 24) | (dev_addr[4] << 16);
+
+ xge_wr_csr(pdata, STATION_ADDR0, addr0);
+ xge_wr_csr(pdata, STATION_ADDR1, addr1);
+}
+
+void xge_mac_init(struct xge_pdata *pdata)
+{
+ xge_mac_reset(pdata);
+ xge_mac_set_speed(pdata);
+ xge_mac_set_station_addr(pdata);
+}
+
+void xge_mac_enable(struct xge_pdata *pdata)
+{
+ u32 data;
+
+ data = xge_rd_csr(pdata, MAC_CONFIG_1);
+ data |= TX_EN | RX_EN;
+ xge_wr_csr(pdata, MAC_CONFIG_1, data);
+
+ data = xge_rd_csr(pdata, MAC_CONFIG_1);
+}
+
+void xge_mac_disable(struct xge_pdata *pdata)
+{
+ u32 data;
+
+ data = xge_rd_csr(pdata, MAC_CONFIG_1);
+ data &= ~(TX_EN | RX_EN);
+ xge_wr_csr(pdata, MAC_CONFIG_1, data);
+}
diff --git a/drivers/net/ethernet/apm/xgene-v2/mac.h b/drivers/net/ethernet/apm/xgene-v2/mac.h
new file mode 100644
index 0000000..0fce6ae
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene-v2/mac.h
@@ -0,0 +1,110 @@
+/*
+ * Applied Micro X-Gene SoC Ethernet v2 Driver
+ *
+ * Copyright (c) 2017, Applied Micro Circuits Corporation
+ * Author(s): Iyappan Subramanian <isubramanian@....com>
+ * Keyur Chudgar <kchudgar@....com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __XGENE_ENET_V2_MAC_H__
+#define __XGENE_ENET_V2_MAC_H__
+
+/* Register offsets */
+#define MAC_CONFIG_1 0xa000
+#define MAC_CONFIG_2 0xa004
+#define MII_MGMT_CONFIG 0xa020
+#define MII_MGMT_COMMAND 0xa024
+#define MII_MGMT_ADDRESS 0xa028
+#define MII_MGMT_CONTROL 0xa02c
+#define MII_MGMT_STATUS 0xa030
+#define MII_MGMT_INDICATORS 0xa034
+#define INTERFACE_CONTROL 0xa038
+#define STATION_ADDR0 0xa040
+#define STATION_ADDR1 0xa044
+#define RBYT 0xa09c
+#define RPKT 0xa0a0
+#define RFCS 0xa0a4
+
+#define RGMII_REG_0 0x27e0
+#define ICM_CONFIG0_REG_0 0x2c00
+#define ICM_CONFIG2_REG_0 0x2c08
+#define ECM_CONFIG0_REG_0 0x2d00
+
+/* Register fields */
+#define SOFT_RESET BIT(31)
+#define TX_EN BIT(0)
+#define RX_EN BIT(2)
+#define PAD_CRC BIT(2)
+#define CRC_EN BIT(1)
+#define FULL_DUPLEX BIT(0)
+
+#define INTF_MODE_POS 8
+#define INTF_MODE_LEN 2
+#define HD_MODE_POS 25
+#define HD_MODE_LEN 2
+#define CFG_MACMODE_POS 18
+#define CFG_MACMODE_LEN 2
+#define CFG_WAITASYNCRD_POS 0
+#define CFG_WAITASYNCRD_LEN 16
+#define CFG_SPEED_125_POS 24
+#define CFG_WFIFOFULLTHR_POS 0
+#define CFG_WFIFOFULLTHR_LEN 7
+#define MGMT_CLOCK_SEL_POS 0
+#define MGMT_CLOCK_SEL_LEN 3
+#define PHY_ADDR_POS 8
+#define PHY_ADDR_LEN 5
+#define REG_ADDR_POS 0
+#define REG_ADDR_LEN 5
+#define MII_MGMT_BUSY BIT(0)
+#define MII_READ_CYCLE BIT(0)
+#define CFG_WAITASYNCRD_EN BIT(16)
+
+static inline void xgene_set_reg_bits(u32 *var, int pos, int len, u32 val)
+{
+ u32 mask = GENMASK(pos + len, pos);
+
+ *var &= ~mask;
+ *var |= ((val << pos) & mask);
+}
+
+static inline u32 xgene_get_reg_bits(u32 var, int pos, int len)
+{
+ u32 mask = GENMASK(pos + len, pos);
+
+ return (var & mask) >> pos;
+}
+
+#define SET_REG_BITS(var, field, val) \
+ xgene_set_reg_bits(var, field ## _POS, field ## _LEN, val)
+
+#define SET_REG_BIT(var, field, val) \
+ xgene_set_reg_bits(var, field ## _POS, 1, val)
+
+#define GET_REG_BITS(var, field) \
+ xgene_get_reg_bits(var, field ## _POS, field ## _LEN)
+
+#define GET_REG_BIT(var, field) ((var) & (field))
+
+struct xge_pdata;
+
+void xge_mac_reset(struct xge_pdata *pdata);
+void xge_mac_enable(struct xge_pdata *pdata);
+void xge_mac_disable(struct xge_pdata *pdata);
+void xge_mac_init(struct xge_pdata *pdata);
+int xge_port_init(struct net_device *ndev);
+void xge_mac_set_station_addr(struct xge_pdata *pdata);
+
+#endif /* __XGENE_ENET_V2_MAC_H__ */
--
1.9.1
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