// SPDX-License-Identifier: GPL-2.0-or-later /* * dwmac-sun8i.c - Allwinner sun8i DWMAC specific glue layer * * Copyright (C) 2017 Corentin Labbe <[email protected]> */ #include <linux/clk.h> #include <linux/io.h> #include <linux/iopoll.h> #include <linux/mdio-mux.h> #include <linux/mfd/syscon.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_mdio.h> #include <linux/of_net.h> #include <linux/of_platform.h> #include <linux/phy.h> #include <linux/platform_device.h> #include <linux/pm_runtime.h> #include <linux/regulator/consumer.h> #include <linux/regmap.h> #include <linux/stmmac.h> #include "stmmac.h" #include "stmmac_platform.h" /* General notes on dwmac-sun8i: * Locking: no locking is necessary in this file because all necessary locking * is done in the "stmmac files" */ /* struct emac_variant - Describe dwmac-sun8i hardware variant * @default_syscon_value: The default value of the EMAC register in syscon * This value is used for disabling properly EMAC * and used as a good starting value in case of the * boot process(uboot) leave some stuff. * @syscon_field reg_field for the syscon's gmac register * @soc_has_internal_phy: Does the MAC embed an internal PHY * @support_mii: Does the MAC handle MII * @support_rmii: Does the MAC handle RMII * @support_rgmii: Does the MAC handle RGMII * * @rx_delay_max: Maximum raw value for RX delay chain * @tx_delay_max: Maximum raw value for TX delay chain * These two also indicate the bitmask for * the RX and TX delay chain registers. A * value of zero indicates this is not supported. */ struct emac_variant { … }; /* struct sunxi_priv_data - hold all sunxi private data * @ephy_clk: reference to the optional EPHY clock for the internal PHY * @regulator: reference to the optional regulator * @rst_ephy: reference to the optional EPHY reset for the internal PHY * @variant: reference to the current board variant * @regmap: regmap for using the syscon * @internal_phy_powered: Does the internal PHY is enabled * @use_internal_phy: Is the internal PHY selected for use * @mux_handle: Internal pointer used by mdio-mux lib */ struct sunxi_priv_data { … }; /* EMAC clock register @ 0x30 in the "system control" address range */ static const struct reg_field sun8i_syscon_reg_field = …; /* EMAC clock register @ 0x164 in the CCU address range */ static const struct reg_field sun8i_ccu_reg_field = …; static const struct emac_variant emac_variant_h3 = …; static const struct emac_variant emac_variant_v3s = …; static const struct emac_variant emac_variant_a83t = …; static const struct emac_variant emac_variant_r40 = …; static const struct emac_variant emac_variant_a64 = …; static const struct emac_variant emac_variant_h6 = …; #define EMAC_BASIC_CTL0 … #define EMAC_BASIC_CTL1 … #define EMAC_INT_STA … #define EMAC_INT_EN … #define EMAC_TX_CTL0 … #define EMAC_TX_CTL1 … #define EMAC_TX_FLOW_CTL … #define EMAC_TX_DESC_LIST … #define EMAC_RX_CTL0 … #define EMAC_RX_CTL1 … #define EMAC_RX_DESC_LIST … #define EMAC_RX_FRM_FLT … #define EMAC_MDIO_CMD … #define EMAC_MDIO_DATA … #define EMAC_MACADDR_HI(reg) … #define EMAC_MACADDR_LO(reg) … #define EMAC_TX_DMA_STA … #define EMAC_TX_CUR_DESC … #define EMAC_TX_CUR_BUF … #define EMAC_RX_DMA_STA … #define EMAC_RX_CUR_DESC … #define EMAC_RX_CUR_BUF … /* Use in EMAC_BASIC_CTL0 */ #define EMAC_DUPLEX_FULL … #define EMAC_LOOPBACK … #define EMAC_SPEED_1000 … #define EMAC_SPEED_100 … #define EMAC_SPEED_10 … /* Use in EMAC_BASIC_CTL1 */ #define EMAC_BURSTLEN_SHIFT … /* Used in EMAC_RX_FRM_FLT */ #define EMAC_FRM_FLT_RXALL … #define EMAC_FRM_FLT_CTL … #define EMAC_FRM_FLT_MULTICAST … /* Used in RX_CTL1*/ #define EMAC_RX_MD … #define EMAC_RX_TH_MASK … #define EMAC_RX_TH_32 … #define EMAC_RX_TH_64 … #define EMAC_RX_TH_96 … #define EMAC_RX_TH_128 … #define EMAC_RX_DMA_EN … #define EMAC_RX_DMA_START … /* Used in TX_CTL1*/ #define EMAC_TX_MD … #define EMAC_TX_NEXT_FRM … #define EMAC_TX_TH_MASK … #define EMAC_TX_TH_64 … #define EMAC_TX_TH_128 … #define EMAC_TX_TH_192 … #define EMAC_TX_TH_256 … #define EMAC_TX_DMA_EN … #define EMAC_TX_DMA_START … /* Used in RX_CTL0 */ #define EMAC_RX_RECEIVER_EN … #define EMAC_RX_DO_CRC … #define EMAC_RX_FLOW_CTL_EN … /* Used in TX_CTL0 */ #define EMAC_TX_TRANSMITTER_EN … /* Used in EMAC_TX_FLOW_CTL */ #define EMAC_TX_FLOW_CTL_EN … /* Used in EMAC_INT_STA */ #define EMAC_TX_INT … #define EMAC_TX_DMA_STOP_INT … #define EMAC_TX_BUF_UA_INT … #define EMAC_TX_TIMEOUT_INT … #define EMAC_TX_UNDERFLOW_INT … #define EMAC_TX_EARLY_INT … #define EMAC_RX_INT … #define EMAC_RX_BUF_UA_INT … #define EMAC_RX_DMA_STOP_INT … #define EMAC_RX_TIMEOUT_INT … #define EMAC_RX_OVERFLOW_INT … #define EMAC_RX_EARLY_INT … #define EMAC_RGMII_STA_INT … #define EMAC_INT_MSK_COMMON … #define EMAC_INT_MSK_TX … #define EMAC_INT_MSK_RX … #define MAC_ADDR_TYPE_DST … /* H3 specific bits for EPHY */ #define H3_EPHY_ADDR_SHIFT … #define H3_EPHY_CLK_SEL … #define H3_EPHY_LED_POL … #define H3_EPHY_SHUTDOWN … #define H3_EPHY_SELECT … #define H3_EPHY_MUX_MASK … #define DWMAC_SUN8I_MDIO_MUX_INTERNAL_ID … #define DWMAC_SUN8I_MDIO_MUX_EXTERNAL_ID … /* H3/A64 specific bits */ #define SYSCON_RMII_EN … /* Generic system control EMAC_CLK bits */ #define SYSCON_ETXDC_SHIFT … #define SYSCON_ERXDC_SHIFT … /* EMAC PHY Interface Type */ #define SYSCON_EPIT … #define SYSCON_ETCS_MASK … #define SYSCON_ETCS_MII … #define SYSCON_ETCS_EXT_GMII … #define SYSCON_ETCS_INT_GMII … /* sun8i_dwmac_dma_reset() - reset the EMAC * Called from stmmac via stmmac_dma_ops->reset */ static int sun8i_dwmac_dma_reset(void __iomem *ioaddr) { … } /* sun8i_dwmac_dma_init() - initialize the EMAC * Called from stmmac via stmmac_dma_ops->init */ static void sun8i_dwmac_dma_init(void __iomem *ioaddr, struct stmmac_dma_cfg *dma_cfg, int atds) { … } static void sun8i_dwmac_dma_init_rx(struct stmmac_priv *priv, void __iomem *ioaddr, struct stmmac_dma_cfg *dma_cfg, dma_addr_t dma_rx_phy, u32 chan) { … } static void sun8i_dwmac_dma_init_tx(struct stmmac_priv *priv, void __iomem *ioaddr, struct stmmac_dma_cfg *dma_cfg, dma_addr_t dma_tx_phy, u32 chan) { … } /* sun8i_dwmac_dump_regs() - Dump EMAC address space * Called from stmmac_dma_ops->dump_regs * Used for ethtool */ static void sun8i_dwmac_dump_regs(struct stmmac_priv *priv, void __iomem *ioaddr, u32 *reg_space) { … } /* sun8i_dwmac_dump_mac_regs() - Dump EMAC address space * Called from stmmac_ops->dump_regs * Used for ethtool */ static void sun8i_dwmac_dump_mac_regs(struct mac_device_info *hw, u32 *reg_space) { … } static void sun8i_dwmac_enable_dma_irq(struct stmmac_priv *priv, void __iomem *ioaddr, u32 chan, bool rx, bool tx) { … } static void sun8i_dwmac_disable_dma_irq(struct stmmac_priv *priv, void __iomem *ioaddr, u32 chan, bool rx, bool tx) { … } static void sun8i_dwmac_dma_start_tx(struct stmmac_priv *priv, void __iomem *ioaddr, u32 chan) { … } static void sun8i_dwmac_enable_dma_transmission(void __iomem *ioaddr) { … } static void sun8i_dwmac_dma_stop_tx(struct stmmac_priv *priv, void __iomem *ioaddr, u32 chan) { … } static void sun8i_dwmac_dma_start_rx(struct stmmac_priv *priv, void __iomem *ioaddr, u32 chan) { … } static void sun8i_dwmac_dma_stop_rx(struct stmmac_priv *priv, void __iomem *ioaddr, u32 chan) { … } static int sun8i_dwmac_dma_interrupt(struct stmmac_priv *priv, void __iomem *ioaddr, struct stmmac_extra_stats *x, u32 chan, u32 dir) { … } static void sun8i_dwmac_dma_operation_mode_rx(struct stmmac_priv *priv, void __iomem *ioaddr, int mode, u32 channel, int fifosz, u8 qmode) { … } static void sun8i_dwmac_dma_operation_mode_tx(struct stmmac_priv *priv, void __iomem *ioaddr, int mode, u32 channel, int fifosz, u8 qmode) { … } static const struct stmmac_dma_ops sun8i_dwmac_dma_ops = …; static int sun8i_dwmac_power_internal_phy(struct stmmac_priv *priv); static int sun8i_dwmac_init(struct platform_device *pdev, void *priv) { … } static void sun8i_dwmac_core_init(struct mac_device_info *hw, struct net_device *dev) { … } static void sun8i_dwmac_set_mac(void __iomem *ioaddr, bool enable) { … } /* 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, const unsigned char *addr, unsigned int reg_n) { … } static void sun8i_dwmac_get_umac_addr(struct mac_device_info *hw, unsigned char *addr, unsigned int reg_n) { … } /* caution this function must return non 0 to work */ static int sun8i_dwmac_rx_ipc_enable(struct mac_device_info *hw) { … } static void sun8i_dwmac_set_filter(struct mac_device_info *hw, struct net_device *dev) { … } static void sun8i_dwmac_flow_ctrl(struct mac_device_info *hw, unsigned int duplex, unsigned int fc, unsigned int pause_time, u32 tx_cnt) { … } static int sun8i_dwmac_reset(struct stmmac_priv *priv) { … } /* Search in mdio-mux node for internal PHY node and get its clk/reset */ static int get_ephy_nodes(struct stmmac_priv *priv) { … } static int sun8i_dwmac_power_internal_phy(struct stmmac_priv *priv) { … } static void sun8i_dwmac_unpower_internal_phy(struct sunxi_priv_data *gmac) { … } /* MDIO multiplexing switch function * This function is called by the mdio-mux layer when it thinks the mdio bus * multiplexer needs to switch. * 'current_child' is the current value of the mux register * 'desired_child' is the value of the 'reg' property of the target child MDIO * node. * The first time this function is called, current_child == -1. * If current_child == desired_child, then the mux is already set to the * correct bus. */ static int mdio_mux_syscon_switch_fn(int current_child, int desired_child, void *data) { … } static int sun8i_dwmac_register_mdio_mux(struct stmmac_priv *priv) { … } static int sun8i_dwmac_set_syscon(struct device *dev, struct plat_stmmacenet_data *plat) { … } static void sun8i_dwmac_unset_syscon(struct sunxi_priv_data *gmac) { … } static void sun8i_dwmac_exit(struct platform_device *pdev, void *priv) { … } static void sun8i_dwmac_set_mac_loopback(void __iomem *ioaddr, bool enable) { … } static const struct stmmac_ops sun8i_dwmac_ops = …; static struct mac_device_info *sun8i_dwmac_setup(void *ppriv) { … } static struct regmap *sun8i_dwmac_get_syscon_from_dev(struct device_node *node) { … } static int sun8i_dwmac_probe(struct platform_device *pdev) { … } static void sun8i_dwmac_remove(struct platform_device *pdev) { … } static void sun8i_dwmac_shutdown(struct platform_device *pdev) { … } static const struct of_device_id sun8i_dwmac_match[] = …; MODULE_DEVICE_TABLE(of, sun8i_dwmac_match); static struct platform_driver sun8i_dwmac_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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