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@@ -0,0 +1,990 @@
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+/*
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+ * dwmac-sun8i.c - Allwinner sun8i DWMAC specific glue layer
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+ *
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+ * Copyright (C) 2017 Corentin Labbe <clabbe.montjoie@gmail.com>
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; either version 2 of the License, or
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+ * (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ */
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+
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+#include <linux/clk.h>
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+#include <linux/io.h>
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+#include <linux/iopoll.h>
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+#include <linux/mfd/syscon.h>
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+#include <linux/module.h>
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+#include <linux/of_device.h>
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+#include <linux/of_mdio.h>
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+#include <linux/of_net.h>
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+#include <linux/phy.h>
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+#include <linux/platform_device.h>
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+#include <linux/regulator/consumer.h>
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+#include <linux/regmap.h>
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+#include <linux/stmmac.h>
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+
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+#include "stmmac.h"
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+#include "stmmac_platform.h"
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+
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+/* General notes on dwmac-sun8i:
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+ * Locking: no locking is necessary in this file because all necessary locking
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+ * is done in the "stmmac files"
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+ */
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+
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+/* struct emac_variant - Descrive dwmac-sun8i hardware variant
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+ * @default_syscon_value: The default value of the EMAC register in syscon
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+ * This value is used for disabling properly EMAC
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+ * and used as a good starting value in case of the
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+ * boot process(uboot) leave some stuff.
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+ * @internal_phy: Does the MAC embed an internal PHY
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+ * @support_mii: Does the MAC handle MII
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+ * @support_rmii: Does the MAC handle RMII
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+ * @support_rgmii: Does the MAC handle RGMII
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+ */
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+struct emac_variant {
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+ u32 default_syscon_value;
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+ int internal_phy;
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+ bool support_mii;
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+ bool support_rmii;
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+ bool support_rgmii;
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+};
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+
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+/* struct sunxi_priv_data - hold all sunxi private data
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+ * @tx_clk: reference to MAC TX clock
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+ * @ephy_clk: reference to the optional EPHY clock for the internal PHY
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+ * @regulator: reference to the optional regulator
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+ * @rst_ephy: reference to the optional EPHY reset for the internal PHY
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+ * @variant: reference to the current board variant
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+ * @regmap: regmap for using the syscon
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+ * @use_internal_phy: Does the current PHY choice imply using the internal PHY
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+ */
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+struct sunxi_priv_data {
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+ struct clk *tx_clk;
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+ struct clk *ephy_clk;
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+ struct regulator *regulator;
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+ struct reset_control *rst_ephy;
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+ const struct emac_variant *variant;
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+ struct regmap *regmap;
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+ bool use_internal_phy;
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+};
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+
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+static const struct emac_variant emac_variant_h3 = {
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+ .default_syscon_value = 0x58000,
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+ .internal_phy = PHY_INTERFACE_MODE_MII,
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+ .support_mii = true,
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+ .support_rmii = true,
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+ .support_rgmii = true
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+};
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+
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+static const struct emac_variant emac_variant_a83t = {
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+ .default_syscon_value = 0,
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+ .internal_phy = 0,
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+ .support_mii = true,
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+ .support_rgmii = true
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+};
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+
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+static const struct emac_variant emac_variant_a64 = {
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+ .default_syscon_value = 0,
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+ .internal_phy = 0,
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+ .support_mii = true,
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+ .support_rmii = true,
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+ .support_rgmii = true
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+};
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+
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+#define EMAC_BASIC_CTL0 0x00
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+#define EMAC_BASIC_CTL1 0x04
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+#define EMAC_INT_STA 0x08
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+#define EMAC_INT_EN 0x0C
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+#define EMAC_TX_CTL0 0x10
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+#define EMAC_TX_CTL1 0x14
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+#define EMAC_TX_FLOW_CTL 0x1C
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+#define EMAC_TX_DESC_LIST 0x20
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+#define EMAC_RX_CTL0 0x24
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+#define EMAC_RX_CTL1 0x28
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+#define EMAC_RX_DESC_LIST 0x34
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+#define EMAC_RX_FRM_FLT 0x38
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+#define EMAC_MDIO_CMD 0x48
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+#define EMAC_MDIO_DATA 0x4C
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+#define EMAC_MACADDR_HI(reg) (0x50 + (reg) * 8)
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+#define EMAC_MACADDR_LO(reg) (0x54 + (reg) * 8)
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+#define EMAC_TX_DMA_STA 0xB0
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+#define EMAC_TX_CUR_DESC 0xB4
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+#define EMAC_TX_CUR_BUF 0xB8
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+#define EMAC_RX_DMA_STA 0xC0
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+#define EMAC_RX_CUR_DESC 0xC4
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+#define EMAC_RX_CUR_BUF 0xC8
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+
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+/* Use in EMAC_BASIC_CTL0 */
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+#define EMAC_DUPLEX_FULL BIT(0)
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+#define EMAC_LOOPBACK BIT(1)
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+#define EMAC_SPEED_1000 0
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+#define EMAC_SPEED_100 (0x03 << 2)
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+#define EMAC_SPEED_10 (0x02 << 2)
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+
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+/* Use in EMAC_BASIC_CTL1 */
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+#define EMAC_BURSTLEN_SHIFT 24
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+
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+/* Used in EMAC_RX_FRM_FLT */
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+#define EMAC_FRM_FLT_RXALL BIT(0)
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+#define EMAC_FRM_FLT_CTL BIT(13)
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+#define EMAC_FRM_FLT_MULTICAST BIT(16)
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+
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+/* Used in RX_CTL1*/
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+#define EMAC_RX_MD BIT(1)
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+#define EMAC_RX_TH_MASK GENMASK(4, 5)
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+#define EMAC_RX_TH_32 0
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+#define EMAC_RX_TH_64 (0x1 << 4)
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+#define EMAC_RX_TH_96 (0x2 << 4)
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+#define EMAC_RX_TH_128 (0x3 << 4)
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+#define EMAC_RX_DMA_EN BIT(30)
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+#define EMAC_RX_DMA_START BIT(31)
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+
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+/* Used in TX_CTL1*/
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+#define EMAC_TX_MD BIT(1)
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+#define EMAC_TX_NEXT_FRM BIT(2)
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+#define EMAC_TX_TH_MASK GENMASK(8, 10)
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+#define EMAC_TX_TH_64 0
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+#define EMAC_TX_TH_128 (0x1 << 8)
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+#define EMAC_TX_TH_192 (0x2 << 8)
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+#define EMAC_TX_TH_256 (0x3 << 8)
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+#define EMAC_TX_DMA_EN BIT(30)
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+#define EMAC_TX_DMA_START BIT(31)
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+
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+/* Used in RX_CTL0 */
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+#define EMAC_RX_RECEIVER_EN BIT(31)
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+#define EMAC_RX_DO_CRC BIT(27)
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+#define EMAC_RX_FLOW_CTL_EN BIT(16)
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+
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+/* Used in TX_CTL0 */
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+#define EMAC_TX_TRANSMITTER_EN BIT(31)
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+
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+/* Used in EMAC_TX_FLOW_CTL */
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+#define EMAC_TX_FLOW_CTL_EN BIT(0)
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+
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+/* Used in EMAC_INT_STA */
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+#define EMAC_TX_INT BIT(0)
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+#define EMAC_TX_DMA_STOP_INT BIT(1)
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+#define EMAC_TX_BUF_UA_INT BIT(2)
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+#define EMAC_TX_TIMEOUT_INT BIT(3)
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+#define EMAC_TX_UNDERFLOW_INT BIT(4)
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+#define EMAC_TX_EARLY_INT BIT(5)
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+#define EMAC_RX_INT BIT(8)
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+#define EMAC_RX_BUF_UA_INT BIT(9)
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+#define EMAC_RX_DMA_STOP_INT BIT(10)
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+#define EMAC_RX_TIMEOUT_INT BIT(11)
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+#define EMAC_RX_OVERFLOW_INT BIT(12)
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+#define EMAC_RX_EARLY_INT BIT(13)
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+#define EMAC_RGMII_STA_INT BIT(16)
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+
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+#define MAC_ADDR_TYPE_DST BIT(31)
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+
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+/* H3 specific bits for EPHY */
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+#define H3_EPHY_ADDR_SHIFT 20
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+#define H3_EPHY_LED_POL BIT(17) /* 1: active low, 0: active high */
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+#define H3_EPHY_SHUTDOWN BIT(16) /* 1: shutdown, 0: power up */
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+#define H3_EPHY_SELECT BIT(15) /* 1: internal PHY, 0: external PHY */
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+
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+/* H3/A64 specific bits */
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+#define SYSCON_RMII_EN BIT(13) /* 1: enable RMII (overrides EPIT) */
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+
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+/* Generic system control EMAC_CLK bits */
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+#define SYSCON_ETXDC_MASK GENMASK(2, 0)
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+#define SYSCON_ETXDC_SHIFT 10
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+#define SYSCON_ERXDC_MASK GENMASK(4, 0)
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+#define SYSCON_ERXDC_SHIFT 5
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+/* EMAC PHY Interface Type */
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+#define SYSCON_EPIT BIT(2) /* 1: RGMII, 0: MII */
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+#define SYSCON_ETCS_MASK GENMASK(1, 0)
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+#define SYSCON_ETCS_MII 0x0
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+#define SYSCON_ETCS_EXT_GMII 0x1
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+#define SYSCON_ETCS_INT_GMII 0x2
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+#define SYSCON_EMAC_REG 0x30
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+
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+/* sun8i_dwmac_dma_reset() - reset the EMAC
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+ * Called from stmmac via stmmac_dma_ops->reset
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+ */
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+static int sun8i_dwmac_dma_reset(void __iomem *ioaddr)
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+{
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+ writel(0, ioaddr + EMAC_RX_CTL1);
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+ writel(0, ioaddr + EMAC_TX_CTL1);
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+ writel(0, ioaddr + EMAC_RX_FRM_FLT);
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+ writel(0, ioaddr + EMAC_RX_DESC_LIST);
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+ writel(0, ioaddr + EMAC_TX_DESC_LIST);
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+ writel(0, ioaddr + EMAC_INT_EN);
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+ writel(0x1FFFFFF, ioaddr + EMAC_INT_STA);
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+ return 0;
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+}
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+
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+/* sun8i_dwmac_dma_init() - initialize the EMAC
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+ * Called from stmmac via stmmac_dma_ops->init
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+ */
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+static void sun8i_dwmac_dma_init(void __iomem *ioaddr,
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+ struct stmmac_dma_cfg *dma_cfg,
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+ u32 dma_tx, u32 dma_rx, int atds)
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+{
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+ /* Write TX and RX descriptors address */
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+ writel(dma_rx, ioaddr + EMAC_RX_DESC_LIST);
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+ writel(dma_tx, ioaddr + EMAC_TX_DESC_LIST);
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+
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+ writel(EMAC_RX_INT | EMAC_TX_INT, ioaddr + EMAC_INT_EN);
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+ writel(0x1FFFFFF, ioaddr + EMAC_INT_STA);
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+}
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+
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+/* sun8i_dwmac_dump_regs() - Dump EMAC address space
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+ * Called from stmmac_dma_ops->dump_regs
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+ * Used for ethtool
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+ */
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+static void sun8i_dwmac_dump_regs(void __iomem *ioaddr, u32 *reg_space)
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+{
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+ int i;
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+
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+ for (i = 0; i < 0xC8; i += 4) {
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+ if (i == 0x32 || i == 0x3C)
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+ continue;
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+ reg_space[i / 4] = readl(ioaddr + i);
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+ }
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+}
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+
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+/* sun8i_dwmac_dump_mac_regs() - Dump EMAC address space
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+ * Called from stmmac_ops->dump_regs
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+ * Used for ethtool
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+ */
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+static void sun8i_dwmac_dump_mac_regs(struct mac_device_info *hw,
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+ u32 *reg_space)
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+{
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+ int i;
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+ void __iomem *ioaddr = hw->pcsr;
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+
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+ for (i = 0; i < 0xC8; i += 4) {
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+ if (i == 0x32 || i == 0x3C)
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+ continue;
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+ reg_space[i / 4] = readl(ioaddr + i);
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+ }
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+}
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+
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+static void sun8i_dwmac_enable_dma_irq(void __iomem *ioaddr, u32 chan)
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+{
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+ writel(EMAC_RX_INT | EMAC_TX_INT, ioaddr + EMAC_INT_EN);
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+}
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+
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+static void sun8i_dwmac_disable_dma_irq(void __iomem *ioaddr, u32 chan)
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+{
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+ writel(0, ioaddr + EMAC_INT_EN);
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+}
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+
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+static void sun8i_dwmac_dma_start_tx(void __iomem *ioaddr, u32 chan)
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+{
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+ u32 v;
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+
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+ v = readl(ioaddr + EMAC_TX_CTL1);
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+ v |= EMAC_TX_DMA_START;
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+ v |= EMAC_TX_DMA_EN;
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+ writel(v, ioaddr + EMAC_TX_CTL1);
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+}
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+
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+static void sun8i_dwmac_enable_dma_transmission(void __iomem *ioaddr)
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+{
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+ u32 v;
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+
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+ v = readl(ioaddr + EMAC_TX_CTL1);
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+ v |= EMAC_TX_DMA_START;
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+ v |= EMAC_TX_DMA_EN;
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+ writel(v, ioaddr + EMAC_TX_CTL1);
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+}
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+
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+static void sun8i_dwmac_dma_stop_tx(void __iomem *ioaddr, u32 chan)
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+{
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+ u32 v;
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+
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+ v = readl(ioaddr + EMAC_TX_CTL1);
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+ v &= ~EMAC_TX_DMA_EN;
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+ writel(v, ioaddr + EMAC_TX_CTL1);
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+}
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+
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+static void sun8i_dwmac_dma_start_rx(void __iomem *ioaddr, u32 chan)
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+{
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+ u32 v;
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+
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+ v = readl(ioaddr + EMAC_RX_CTL1);
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+ v |= EMAC_RX_DMA_START;
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+ v |= EMAC_RX_DMA_EN;
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+ writel(v, ioaddr + EMAC_RX_CTL1);
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+}
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+
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+static void sun8i_dwmac_dma_stop_rx(void __iomem *ioaddr, u32 chan)
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+{
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+ u32 v;
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+
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+ v = readl(ioaddr + EMAC_RX_CTL1);
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+ v &= ~EMAC_RX_DMA_EN;
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+ writel(v, ioaddr + EMAC_RX_CTL1);
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+}
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+
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+static int sun8i_dwmac_dma_interrupt(void __iomem *ioaddr,
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+ struct stmmac_extra_stats *x, u32 chan)
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+{
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+ u32 v;
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+ int ret = 0;
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+
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+ v = readl(ioaddr + EMAC_INT_STA);
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+
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+ if (v & EMAC_TX_INT) {
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+ ret |= handle_tx;
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+ x->tx_normal_irq_n++;
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+ }
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+
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+ if (v & EMAC_TX_DMA_STOP_INT)
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+ x->tx_process_stopped_irq++;
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+
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+ if (v & EMAC_TX_BUF_UA_INT)
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+ x->tx_process_stopped_irq++;
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+
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+ if (v & EMAC_TX_TIMEOUT_INT)
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+ ret |= tx_hard_error;
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+
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+ if (v & EMAC_TX_UNDERFLOW_INT) {
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+ ret |= tx_hard_error;
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+ x->tx_undeflow_irq++;
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+ }
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+
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+ if (v & EMAC_TX_EARLY_INT)
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+ x->tx_early_irq++;
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+
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+ if (v & EMAC_RX_INT) {
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+ ret |= handle_rx;
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+ x->rx_normal_irq_n++;
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+ }
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+
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+ if (v & EMAC_RX_BUF_UA_INT)
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+ x->rx_buf_unav_irq++;
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+
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+ if (v & EMAC_RX_DMA_STOP_INT)
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+ x->rx_process_stopped_irq++;
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+
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+ if (v & EMAC_RX_TIMEOUT_INT)
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+ ret |= tx_hard_error;
|
|
|
+
|
|
|
+ if (v & EMAC_RX_OVERFLOW_INT) {
|
|
|
+ ret |= tx_hard_error;
|
|
|
+ x->rx_overflow_irq++;
|
|
|
+ }
|
|
|
+
|
|
|
+ if (v & EMAC_RX_EARLY_INT)
|
|
|
+ x->rx_early_irq++;
|
|
|
+
|
|
|
+ if (v & EMAC_RGMII_STA_INT)
|
|
|
+ x->irq_rgmii_n++;
|
|
|
+
|
|
|
+ writel(v, ioaddr + EMAC_INT_STA);
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+static void sun8i_dwmac_dma_operation_mode(void __iomem *ioaddr, int txmode,
|
|
|
+ int rxmode, int rxfifosz)
|
|
|
+{
|
|
|
+ u32 v;
|
|
|
+
|
|
|
+ v = readl(ioaddr + EMAC_TX_CTL1);
|
|
|
+ if (txmode == SF_DMA_MODE) {
|
|
|
+ v |= EMAC_TX_MD;
|
|
|
+ /* Undocumented bit (called TX_NEXT_FRM in BSP), the original
|
|
|
+ * comment is
|
|
|
+ * "Operating on second frame increase the performance
|
|
|
+ * especially when transmit store-and-forward is used."
|
|
|
+ */
|
|
|
+ v |= EMAC_TX_NEXT_FRM;
|
|
|
+ } else {
|
|
|
+ v &= ~EMAC_TX_MD;
|
|
|
+ v &= ~EMAC_TX_TH_MASK;
|
|
|
+ if (txmode < 64)
|
|
|
+ v |= EMAC_TX_TH_64;
|
|
|
+ else if (txmode < 128)
|
|
|
+ v |= EMAC_TX_TH_128;
|
|
|
+ else if (txmode < 192)
|
|
|
+ v |= EMAC_TX_TH_192;
|
|
|
+ else if (txmode < 256)
|
|
|
+ v |= EMAC_TX_TH_256;
|
|
|
+ }
|
|
|
+ writel(v, ioaddr + EMAC_TX_CTL1);
|
|
|
+
|
|
|
+ v = readl(ioaddr + EMAC_RX_CTL1);
|
|
|
+ if (rxmode == SF_DMA_MODE) {
|
|
|
+ v |= EMAC_RX_MD;
|
|
|
+ } else {
|
|
|
+ v &= ~EMAC_RX_MD;
|
|
|
+ v &= ~EMAC_RX_TH_MASK;
|
|
|
+ if (rxmode < 32)
|
|
|
+ v |= EMAC_RX_TH_32;
|
|
|
+ else if (rxmode < 64)
|
|
|
+ v |= EMAC_RX_TH_64;
|
|
|
+ else if (rxmode < 96)
|
|
|
+ v |= EMAC_RX_TH_96;
|
|
|
+ else if (rxmode < 128)
|
|
|
+ v |= EMAC_RX_TH_128;
|
|
|
+ }
|
|
|
+ writel(v, ioaddr + EMAC_RX_CTL1);
|
|
|
+}
|
|
|
+
|
|
|
+static const struct stmmac_dma_ops sun8i_dwmac_dma_ops = {
|
|
|
+ .reset = sun8i_dwmac_dma_reset,
|
|
|
+ .init = sun8i_dwmac_dma_init,
|
|
|
+ .dump_regs = sun8i_dwmac_dump_regs,
|
|
|
+ .dma_mode = sun8i_dwmac_dma_operation_mode,
|
|
|
+ .enable_dma_transmission = sun8i_dwmac_enable_dma_transmission,
|
|
|
+ .enable_dma_irq = sun8i_dwmac_enable_dma_irq,
|
|
|
+ .disable_dma_irq = sun8i_dwmac_disable_dma_irq,
|
|
|
+ .start_tx = sun8i_dwmac_dma_start_tx,
|
|
|
+ .stop_tx = sun8i_dwmac_dma_stop_tx,
|
|
|
+ .start_rx = sun8i_dwmac_dma_start_rx,
|
|
|
+ .stop_rx = sun8i_dwmac_dma_stop_rx,
|
|
|
+ .dma_interrupt = sun8i_dwmac_dma_interrupt,
|
|
|
+};
|
|
|
+
|
|
|
+static int sun8i_dwmac_init(struct platform_device *pdev, void *priv)
|
|
|
+{
|
|
|
+ struct sunxi_priv_data *gmac = priv;
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ if (gmac->regulator) {
|
|
|
+ ret = regulator_enable(gmac->regulator);
|
|
|
+ if (ret) {
|
|
|
+ dev_err(&pdev->dev, "Fail to enable regulator\n");
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = clk_prepare_enable(gmac->tx_clk);
|
|
|
+ if (ret) {
|
|
|
+ if (gmac->regulator)
|
|
|
+ regulator_disable(gmac->regulator);
|
|
|
+ dev_err(&pdev->dev, "Could not enable AHB clock\n");
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static void sun8i_dwmac_core_init(struct mac_device_info *hw, int mtu)
|
|
|
+{
|
|
|
+ void __iomem *ioaddr = hw->pcsr;
|
|
|
+ u32 v;
|
|
|
+
|
|
|
+ v = (8 << EMAC_BURSTLEN_SHIFT); /* burst len */
|
|
|
+ writel(v, ioaddr + EMAC_BASIC_CTL1);
|
|
|
+}
|
|
|
+
|
|
|
+static void sun8i_dwmac_set_mac(void __iomem *ioaddr, bool enable)
|
|
|
+{
|
|
|
+ u32 t, r;
|
|
|
+
|
|
|
+ t = readl(ioaddr + EMAC_TX_CTL0);
|
|
|
+ r = readl(ioaddr + EMAC_RX_CTL0);
|
|
|
+ if (enable) {
|
|
|
+ t |= EMAC_TX_TRANSMITTER_EN;
|
|
|
+ r |= EMAC_RX_RECEIVER_EN;
|
|
|
+ } else {
|
|
|
+ t &= ~EMAC_TX_TRANSMITTER_EN;
|
|
|
+ r &= ~EMAC_RX_RECEIVER_EN;
|
|
|
+ }
|
|
|
+ writel(t, ioaddr + EMAC_TX_CTL0);
|
|
|
+ writel(r, ioaddr + EMAC_RX_CTL0);
|
|
|
+}
|
|
|
+
|
|
|
+/* Set MAC address at slot reg_n
|
|
|
+ * All slot > 0 need to be enabled with MAC_ADDR_TYPE_DST
|
|
|
+ * If addr is NULL, clear the slot
|
|
|
+ */
|
|
|
+static void sun8i_dwmac_set_umac_addr(struct mac_device_info *hw,
|
|
|
+ unsigned char *addr,
|
|
|
+ unsigned int reg_n)
|
|
|
+{
|
|
|
+ void __iomem *ioaddr = hw->pcsr;
|
|
|
+ u32 v;
|
|
|
+
|
|
|
+ if (!addr) {
|
|
|
+ writel(0, ioaddr + EMAC_MACADDR_HI(reg_n));
|
|
|
+ return;
|
|
|
+ }
|
|
|
+
|
|
|
+ stmmac_set_mac_addr(ioaddr, addr, EMAC_MACADDR_HI(reg_n),
|
|
|
+ EMAC_MACADDR_LO(reg_n));
|
|
|
+ if (reg_n > 0) {
|
|
|
+ v = readl(ioaddr + EMAC_MACADDR_HI(reg_n));
|
|
|
+ v |= MAC_ADDR_TYPE_DST;
|
|
|
+ writel(v, ioaddr + EMAC_MACADDR_HI(reg_n));
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static void sun8i_dwmac_get_umac_addr(struct mac_device_info *hw,
|
|
|
+ unsigned char *addr,
|
|
|
+ unsigned int reg_n)
|
|
|
+{
|
|
|
+ void __iomem *ioaddr = hw->pcsr;
|
|
|
+
|
|
|
+ stmmac_get_mac_addr(ioaddr, addr, EMAC_MACADDR_HI(reg_n),
|
|
|
+ EMAC_MACADDR_LO(reg_n));
|
|
|
+}
|
|
|
+
|
|
|
+/* caution this function must return non 0 to work */
|
|
|
+static int sun8i_dwmac_rx_ipc_enable(struct mac_device_info *hw)
|
|
|
+{
|
|
|
+ void __iomem *ioaddr = hw->pcsr;
|
|
|
+ u32 v;
|
|
|
+
|
|
|
+ v = readl(ioaddr + EMAC_RX_CTL0);
|
|
|
+ v |= EMAC_RX_DO_CRC;
|
|
|
+ writel(v, ioaddr + EMAC_RX_CTL0);
|
|
|
+
|
|
|
+ return 1;
|
|
|
+}
|
|
|
+
|
|
|
+static void sun8i_dwmac_set_filter(struct mac_device_info *hw,
|
|
|
+ struct net_device *dev)
|
|
|
+{
|
|
|
+ void __iomem *ioaddr = hw->pcsr;
|
|
|
+ u32 v;
|
|
|
+ int i = 1;
|
|
|
+ struct netdev_hw_addr *ha;
|
|
|
+ int macaddrs = netdev_uc_count(dev) + netdev_mc_count(dev) + 1;
|
|
|
+
|
|
|
+ v = EMAC_FRM_FLT_CTL;
|
|
|
+
|
|
|
+ if (dev->flags & IFF_PROMISC) {
|
|
|
+ v = EMAC_FRM_FLT_RXALL;
|
|
|
+ } else if (dev->flags & IFF_ALLMULTI) {
|
|
|
+ v |= EMAC_FRM_FLT_MULTICAST;
|
|
|
+ } else if (macaddrs <= hw->unicast_filter_entries) {
|
|
|
+ if (!netdev_mc_empty(dev)) {
|
|
|
+ netdev_for_each_mc_addr(ha, dev) {
|
|
|
+ sun8i_dwmac_set_umac_addr(hw, ha->addr, i);
|
|
|
+ i++;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ if (!netdev_uc_empty(dev)) {
|
|
|
+ netdev_for_each_uc_addr(ha, dev) {
|
|
|
+ sun8i_dwmac_set_umac_addr(hw, ha->addr, i);
|
|
|
+ i++;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ netdev_info(dev, "Too many address, switching to promiscuous\n");
|
|
|
+ v = EMAC_FRM_FLT_RXALL;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Disable unused address filter slots */
|
|
|
+ while (i < hw->unicast_filter_entries)
|
|
|
+ sun8i_dwmac_set_umac_addr(hw, NULL, i++);
|
|
|
+
|
|
|
+ writel(v, ioaddr + EMAC_RX_FRM_FLT);
|
|
|
+}
|
|
|
+
|
|
|
+static void sun8i_dwmac_flow_ctrl(struct mac_device_info *hw,
|
|
|
+ unsigned int duplex, unsigned int fc,
|
|
|
+ unsigned int pause_time, u32 tx_cnt)
|
|
|
+{
|
|
|
+ void __iomem *ioaddr = hw->pcsr;
|
|
|
+ u32 v;
|
|
|
+
|
|
|
+ v = readl(ioaddr + EMAC_RX_CTL0);
|
|
|
+ if (fc == FLOW_AUTO)
|
|
|
+ v |= EMAC_RX_FLOW_CTL_EN;
|
|
|
+ else
|
|
|
+ v &= ~EMAC_RX_FLOW_CTL_EN;
|
|
|
+ writel(v, ioaddr + EMAC_RX_CTL0);
|
|
|
+
|
|
|
+ v = readl(ioaddr + EMAC_TX_FLOW_CTL);
|
|
|
+ if (fc == FLOW_AUTO)
|
|
|
+ v |= EMAC_TX_FLOW_CTL_EN;
|
|
|
+ else
|
|
|
+ v &= ~EMAC_TX_FLOW_CTL_EN;
|
|
|
+ writel(v, ioaddr + EMAC_TX_FLOW_CTL);
|
|
|
+}
|
|
|
+
|
|
|
+static int sun8i_dwmac_reset(struct stmmac_priv *priv)
|
|
|
+{
|
|
|
+ u32 v;
|
|
|
+ int err;
|
|
|
+
|
|
|
+ v = readl(priv->ioaddr + EMAC_BASIC_CTL1);
|
|
|
+ writel(v | 0x01, priv->ioaddr + EMAC_BASIC_CTL1);
|
|
|
+
|
|
|
+ /* The timeout was previoulsy set to 10ms, but some board (OrangePI0)
|
|
|
+ * need more if no cable plugged. 100ms seems OK
|
|
|
+ */
|
|
|
+ err = readl_poll_timeout(priv->ioaddr + EMAC_BASIC_CTL1, v,
|
|
|
+ !(v & 0x01), 100, 100000);
|
|
|
+
|
|
|
+ if (err) {
|
|
|
+ dev_err(priv->device, "EMAC reset timeout\n");
|
|
|
+ return -EFAULT;
|
|
|
+ }
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static int sun8i_dwmac_set_syscon(struct stmmac_priv *priv)
|
|
|
+{
|
|
|
+ struct sunxi_priv_data *gmac = priv->plat->bsp_priv;
|
|
|
+ struct device_node *node = priv->device->of_node;
|
|
|
+ int ret;
|
|
|
+ u32 reg, val;
|
|
|
+
|
|
|
+ regmap_read(gmac->regmap, SYSCON_EMAC_REG, &val);
|
|
|
+ reg = gmac->variant->default_syscon_value;
|
|
|
+ if (reg != val)
|
|
|
+ dev_warn(priv->device,
|
|
|
+ "Current syscon value is not the default %x (expect %x)\n",
|
|
|
+ val, reg);
|
|
|
+
|
|
|
+ if (gmac->variant->internal_phy) {
|
|
|
+ if (!gmac->use_internal_phy) {
|
|
|
+ /* switch to external PHY interface */
|
|
|
+ reg &= ~H3_EPHY_SELECT;
|
|
|
+ } else {
|
|
|
+ reg |= H3_EPHY_SELECT;
|
|
|
+ reg &= ~H3_EPHY_SHUTDOWN;
|
|
|
+ dev_dbg(priv->device, "Select internal_phy %x\n", reg);
|
|
|
+
|
|
|
+ if (of_property_read_bool(priv->plat->phy_node,
|
|
|
+ "allwinner,leds-active-low"))
|
|
|
+ reg |= H3_EPHY_LED_POL;
|
|
|
+ else
|
|
|
+ reg &= ~H3_EPHY_LED_POL;
|
|
|
+
|
|
|
+ ret = of_mdio_parse_addr(priv->device,
|
|
|
+ priv->plat->phy_node);
|
|
|
+ if (ret < 0) {
|
|
|
+ dev_err(priv->device, "Could not parse MDIO addr\n");
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+ /* of_mdio_parse_addr returns a valid (0 ~ 31) PHY
|
|
|
+ * address. No need to mask it again.
|
|
|
+ */
|
|
|
+ reg |= ret << H3_EPHY_ADDR_SHIFT;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if (!of_property_read_u32(node, "allwinner,tx-delay-ps", &val)) {
|
|
|
+ if (val % 100) {
|
|
|
+ dev_err(priv->device, "tx-delay must be a multiple of 100\n");
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+ val /= 100;
|
|
|
+ dev_dbg(priv->device, "set tx-delay to %x\n", val);
|
|
|
+ if (val <= SYSCON_ETXDC_MASK) {
|
|
|
+ reg &= ~(SYSCON_ETXDC_MASK << SYSCON_ETXDC_SHIFT);
|
|
|
+ reg |= (val << SYSCON_ETXDC_SHIFT);
|
|
|
+ } else {
|
|
|
+ dev_err(priv->device, "Invalid TX clock delay: %d\n",
|
|
|
+ val);
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if (!of_property_read_u32(node, "allwinner,rx-delay-ps", &val)) {
|
|
|
+ if (val % 100) {
|
|
|
+ dev_err(priv->device, "rx-delay must be a multiple of 100\n");
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+ val /= 100;
|
|
|
+ dev_dbg(priv->device, "set rx-delay to %x\n", val);
|
|
|
+ if (val <= SYSCON_ERXDC_MASK) {
|
|
|
+ reg &= ~(SYSCON_ERXDC_MASK << SYSCON_ERXDC_SHIFT);
|
|
|
+ reg |= (val << SYSCON_ERXDC_SHIFT);
|
|
|
+ } else {
|
|
|
+ dev_err(priv->device, "Invalid RX clock delay: %d\n",
|
|
|
+ val);
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Clear interface mode bits */
|
|
|
+ reg &= ~(SYSCON_ETCS_MASK | SYSCON_EPIT);
|
|
|
+ if (gmac->variant->support_rmii)
|
|
|
+ reg &= ~SYSCON_RMII_EN;
|
|
|
+
|
|
|
+ switch (priv->plat->interface) {
|
|
|
+ case PHY_INTERFACE_MODE_MII:
|
|
|
+ /* default */
|
|
|
+ break;
|
|
|
+ case PHY_INTERFACE_MODE_RGMII:
|
|
|
+ reg |= SYSCON_EPIT | SYSCON_ETCS_INT_GMII;
|
|
|
+ break;
|
|
|
+ case PHY_INTERFACE_MODE_RMII:
|
|
|
+ reg |= SYSCON_RMII_EN | SYSCON_ETCS_EXT_GMII;
|
|
|
+ break;
|
|
|
+ default:
|
|
|
+ dev_err(priv->device, "Unsupported interface mode: %s",
|
|
|
+ phy_modes(priv->plat->interface));
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ regmap_write(gmac->regmap, SYSCON_EMAC_REG, reg);
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static void sun8i_dwmac_unset_syscon(struct sunxi_priv_data *gmac)
|
|
|
+{
|
|
|
+ u32 reg = gmac->variant->default_syscon_value;
|
|
|
+
|
|
|
+ regmap_write(gmac->regmap, SYSCON_EMAC_REG, reg);
|
|
|
+}
|
|
|
+
|
|
|
+static int sun8i_dwmac_power_internal_phy(struct stmmac_priv *priv)
|
|
|
+{
|
|
|
+ struct sunxi_priv_data *gmac = priv->plat->bsp_priv;
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ if (!gmac->use_internal_phy)
|
|
|
+ return 0;
|
|
|
+
|
|
|
+ ret = clk_prepare_enable(gmac->ephy_clk);
|
|
|
+ if (ret) {
|
|
|
+ dev_err(priv->device, "Cannot enable ephy\n");
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+
|
|
|
+ ret = reset_control_deassert(gmac->rst_ephy);
|
|
|
+ if (ret) {
|
|
|
+ dev_err(priv->device, "Cannot deassert ephy\n");
|
|
|
+ clk_disable_unprepare(gmac->ephy_clk);
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static int sun8i_dwmac_unpower_internal_phy(struct sunxi_priv_data *gmac)
|
|
|
+{
|
|
|
+ if (!gmac->use_internal_phy)
|
|
|
+ return 0;
|
|
|
+
|
|
|
+ clk_disable_unprepare(gmac->ephy_clk);
|
|
|
+ reset_control_assert(gmac->rst_ephy);
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+/* sun8i_power_phy() - Activate the PHY:
|
|
|
+ * In case of error, no need to call sun8i_unpower_phy(),
|
|
|
+ * it will be called anyway by sun8i_dwmac_exit()
|
|
|
+ */
|
|
|
+static int sun8i_power_phy(struct stmmac_priv *priv)
|
|
|
+{
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ ret = sun8i_dwmac_power_internal_phy(priv);
|
|
|
+ if (ret)
|
|
|
+ return ret;
|
|
|
+
|
|
|
+ ret = sun8i_dwmac_set_syscon(priv);
|
|
|
+ if (ret)
|
|
|
+ return ret;
|
|
|
+
|
|
|
+ /* After changing syscon value, the MAC need reset or it will use
|
|
|
+ * the last value (and so the last PHY set.
|
|
|
+ */
|
|
|
+ ret = sun8i_dwmac_reset(priv);
|
|
|
+ if (ret)
|
|
|
+ return ret;
|
|
|
+ return 0;
|
|
|
+}
|
|
|
+
|
|
|
+static void sun8i_unpower_phy(struct sunxi_priv_data *gmac)
|
|
|
+{
|
|
|
+ sun8i_dwmac_unset_syscon(gmac);
|
|
|
+ sun8i_dwmac_unpower_internal_phy(gmac);
|
|
|
+}
|
|
|
+
|
|
|
+static void sun8i_dwmac_exit(struct platform_device *pdev, void *priv)
|
|
|
+{
|
|
|
+ struct sunxi_priv_data *gmac = priv;
|
|
|
+
|
|
|
+ sun8i_unpower_phy(gmac);
|
|
|
+
|
|
|
+ clk_disable_unprepare(gmac->tx_clk);
|
|
|
+
|
|
|
+ if (gmac->regulator)
|
|
|
+ regulator_disable(gmac->regulator);
|
|
|
+}
|
|
|
+
|
|
|
+static const struct stmmac_ops sun8i_dwmac_ops = {
|
|
|
+ .core_init = sun8i_dwmac_core_init,
|
|
|
+ .set_mac = sun8i_dwmac_set_mac,
|
|
|
+ .dump_regs = sun8i_dwmac_dump_mac_regs,
|
|
|
+ .rx_ipc = sun8i_dwmac_rx_ipc_enable,
|
|
|
+ .set_filter = sun8i_dwmac_set_filter,
|
|
|
+ .flow_ctrl = sun8i_dwmac_flow_ctrl,
|
|
|
+ .set_umac_addr = sun8i_dwmac_set_umac_addr,
|
|
|
+ .get_umac_addr = sun8i_dwmac_get_umac_addr,
|
|
|
+};
|
|
|
+
|
|
|
+static struct mac_device_info *sun8i_dwmac_setup(void *ppriv)
|
|
|
+{
|
|
|
+ struct mac_device_info *mac;
|
|
|
+ struct stmmac_priv *priv = ppriv;
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ mac = devm_kzalloc(priv->device, sizeof(*mac), GFP_KERNEL);
|
|
|
+ if (!mac)
|
|
|
+ return NULL;
|
|
|
+
|
|
|
+ ret = sun8i_power_phy(priv);
|
|
|
+ if (ret)
|
|
|
+ return NULL;
|
|
|
+
|
|
|
+ mac->pcsr = priv->ioaddr;
|
|
|
+ mac->mac = &sun8i_dwmac_ops;
|
|
|
+ mac->dma = &sun8i_dwmac_dma_ops;
|
|
|
+
|
|
|
+ /* The loopback bit seems to be re-set when link change
|
|
|
+ * Simply mask it each time
|
|
|
+ * Speed 10/100/1000 are set in BIT(2)/BIT(3)
|
|
|
+ */
|
|
|
+ mac->link.speed_mask = GENMASK(3, 2) | EMAC_LOOPBACK;
|
|
|
+ mac->link.speed10 = EMAC_SPEED_10;
|
|
|
+ mac->link.speed100 = EMAC_SPEED_100;
|
|
|
+ mac->link.speed1000 = EMAC_SPEED_1000;
|
|
|
+ mac->link.duplex = EMAC_DUPLEX_FULL;
|
|
|
+ mac->mii.addr = EMAC_MDIO_CMD;
|
|
|
+ mac->mii.data = EMAC_MDIO_DATA;
|
|
|
+ mac->mii.reg_shift = 4;
|
|
|
+ mac->mii.reg_mask = GENMASK(8, 4);
|
|
|
+ mac->mii.addr_shift = 12;
|
|
|
+ mac->mii.addr_mask = GENMASK(16, 12);
|
|
|
+ mac->mii.clk_csr_shift = 20;
|
|
|
+ mac->mii.clk_csr_mask = GENMASK(22, 20);
|
|
|
+ mac->unicast_filter_entries = 8;
|
|
|
+
|
|
|
+ /* Synopsys Id is not available */
|
|
|
+ priv->synopsys_id = 0;
|
|
|
+
|
|
|
+ return mac;
|
|
|
+}
|
|
|
+
|
|
|
+static int sun8i_dwmac_probe(struct platform_device *pdev)
|
|
|
+{
|
|
|
+ struct plat_stmmacenet_data *plat_dat;
|
|
|
+ struct stmmac_resources stmmac_res;
|
|
|
+ struct sunxi_priv_data *gmac;
|
|
|
+ struct device *dev = &pdev->dev;
|
|
|
+ int ret;
|
|
|
+
|
|
|
+ ret = stmmac_get_platform_resources(pdev, &stmmac_res);
|
|
|
+ if (ret)
|
|
|
+ return ret;
|
|
|
+
|
|
|
+ plat_dat = stmmac_probe_config_dt(pdev, &stmmac_res.mac);
|
|
|
+ if (IS_ERR(plat_dat))
|
|
|
+ return PTR_ERR(plat_dat);
|
|
|
+
|
|
|
+ gmac = devm_kzalloc(dev, sizeof(*gmac), GFP_KERNEL);
|
|
|
+ if (!gmac)
|
|
|
+ return -ENOMEM;
|
|
|
+
|
|
|
+ gmac->variant = of_device_get_match_data(&pdev->dev);
|
|
|
+ if (!gmac->variant) {
|
|
|
+ dev_err(&pdev->dev, "Missing dwmac-sun8i variant\n");
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ gmac->tx_clk = devm_clk_get(dev, "stmmaceth");
|
|
|
+ if (IS_ERR(gmac->tx_clk)) {
|
|
|
+ dev_err(dev, "Could not get TX clock\n");
|
|
|
+ return PTR_ERR(gmac->tx_clk);
|
|
|
+ }
|
|
|
+
|
|
|
+ /* Optional regulator for PHY */
|
|
|
+ gmac->regulator = devm_regulator_get_optional(dev, "phy");
|
|
|
+ if (IS_ERR(gmac->regulator)) {
|
|
|
+ if (PTR_ERR(gmac->regulator) == -EPROBE_DEFER)
|
|
|
+ return -EPROBE_DEFER;
|
|
|
+ dev_info(dev, "No regulator found\n");
|
|
|
+ gmac->regulator = NULL;
|
|
|
+ }
|
|
|
+
|
|
|
+ gmac->regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node,
|
|
|
+ "syscon");
|
|
|
+ if (IS_ERR(gmac->regmap)) {
|
|
|
+ ret = PTR_ERR(gmac->regmap);
|
|
|
+ dev_err(&pdev->dev, "Unable to map syscon: %d\n", ret);
|
|
|
+ return ret;
|
|
|
+ }
|
|
|
+
|
|
|
+ plat_dat->interface = of_get_phy_mode(dev->of_node);
|
|
|
+ if (plat_dat->interface == gmac->variant->internal_phy) {
|
|
|
+ dev_info(&pdev->dev, "Will use internal PHY\n");
|
|
|
+ gmac->use_internal_phy = true;
|
|
|
+ gmac->ephy_clk = of_clk_get(plat_dat->phy_node, 0);
|
|
|
+ if (IS_ERR(gmac->ephy_clk)) {
|
|
|
+ ret = PTR_ERR(gmac->ephy_clk);
|
|
|
+ dev_err(&pdev->dev, "Cannot get EPHY clock: %d\n", ret);
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+
|
|
|
+ gmac->rst_ephy = of_reset_control_get(plat_dat->phy_node, NULL);
|
|
|
+ if (IS_ERR(gmac->rst_ephy)) {
|
|
|
+ ret = PTR_ERR(gmac->rst_ephy);
|
|
|
+ if (ret == -EPROBE_DEFER)
|
|
|
+ return ret;
|
|
|
+ dev_err(&pdev->dev, "No EPHY reset control found %d\n",
|
|
|
+ ret);
|
|
|
+ return -EINVAL;
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ dev_info(&pdev->dev, "Will use external PHY\n");
|
|
|
+ gmac->use_internal_phy = false;
|
|
|
+ }
|
|
|
+
|
|
|
+ /* platform data specifying hardware features and callbacks.
|
|
|
+ * hardware features were copied from Allwinner drivers.
|
|
|
+ */
|
|
|
+ plat_dat->rx_coe = STMMAC_RX_COE_TYPE2;
|
|
|
+ plat_dat->tx_coe = 1;
|
|
|
+ plat_dat->has_sun8i = true;
|
|
|
+ plat_dat->bsp_priv = gmac;
|
|
|
+ plat_dat->init = sun8i_dwmac_init;
|
|
|
+ plat_dat->exit = sun8i_dwmac_exit;
|
|
|
+ plat_dat->setup = sun8i_dwmac_setup;
|
|
|
+
|
|
|
+ ret = sun8i_dwmac_init(pdev, plat_dat->bsp_priv);
|
|
|
+ if (ret)
|
|
|
+ return ret;
|
|
|
+
|
|
|
+ ret = stmmac_dvr_probe(&pdev->dev, plat_dat, &stmmac_res);
|
|
|
+ if (ret)
|
|
|
+ sun8i_dwmac_exit(pdev, plat_dat->bsp_priv);
|
|
|
+
|
|
|
+ return ret;
|
|
|
+}
|
|
|
+
|
|
|
+static const struct of_device_id sun8i_dwmac_match[] = {
|
|
|
+ { .compatible = "allwinner,sun8i-h3-emac",
|
|
|
+ .data = &emac_variant_h3 },
|
|
|
+ { .compatible = "allwinner,sun8i-a83t-emac",
|
|
|
+ .data = &emac_variant_a83t },
|
|
|
+ { .compatible = "allwinner,sun50i-a64-emac",
|
|
|
+ .data = &emac_variant_a64 },
|
|
|
+ { }
|
|
|
+};
|
|
|
+MODULE_DEVICE_TABLE(of, sun8i_dwmac_match);
|
|
|
+
|
|
|
+static struct platform_driver sun8i_dwmac_driver = {
|
|
|
+ .probe = sun8i_dwmac_probe,
|
|
|
+ .remove = stmmac_pltfr_remove,
|
|
|
+ .driver = {
|
|
|
+ .name = "dwmac-sun8i",
|
|
|
+ .pm = &stmmac_pltfr_pm_ops,
|
|
|
+ .of_match_table = sun8i_dwmac_match,
|
|
|
+ },
|
|
|
+};
|
|
|
+module_platform_driver(sun8i_dwmac_driver);
|
|
|
+
|
|
|
+MODULE_AUTHOR("Corentin Labbe <clabbe.montjoie@gmail.com>");
|
|
|
+MODULE_DESCRIPTION("Allwinner sun8i DWMAC specific glue layer");
|
|
|
+MODULE_LICENSE("GPL");
|
David S. Miller