Add MII helper APIs and MACROs. These APIs and MACROs will be later used by ICSSG Ethernet driver. Also introduce icssg_prueth.h which has definition of prueth related structures. Signed-off-by: MD Danish Anwar <danishanwar@xxxxxx> Reviewed-by: Andrew Lunn <andrew@xxxxxxx> --- drivers/net/ethernet/ti/icssg_mii_cfg.c | 120 +++++++++++++++ drivers/net/ethernet/ti/icssg_mii_rt.h | 151 ++++++++++++++++++ drivers/net/ethernet/ti/icssg_prueth.h | 197 ++++++++++++++++++++++++ 3 files changed, 468 insertions(+) create mode 100644 drivers/net/ethernet/ti/icssg_mii_cfg.c create mode 100644 drivers/net/ethernet/ti/icssg_mii_rt.h create mode 100644 drivers/net/ethernet/ti/icssg_prueth.h diff --git a/drivers/net/ethernet/ti/icssg_mii_cfg.c b/drivers/net/ethernet/ti/icssg_mii_cfg.c new file mode 100644 index 000000000000..92718ae40d7e --- /dev/null +++ b/drivers/net/ethernet/ti/icssg_mii_cfg.c @@ -0,0 +1,120 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Texas Instruments ICSSG Ethernet Driver + * + * Copyright (C) 2018-2022 Texas Instruments Incorporated - https://www.ti.com/ + * + */ + +#include <linux/etherdevice.h> +#include <linux/regmap.h> +#include <linux/types.h> + +#include "icssg_mii_rt.h" +#include "icssg_prueth.h" + +void icssg_mii_update_ipg(struct regmap *mii_rt, int mii, u32 ipg) +{ + u32 val; + + if (mii == ICSS_MII0) { + regmap_write(mii_rt, PRUSS_MII_RT_TX_IPG0, ipg); + } else { + regmap_read(mii_rt, PRUSS_MII_RT_TX_IPG0, &val); + regmap_write(mii_rt, PRUSS_MII_RT_TX_IPG1, ipg); + regmap_write(mii_rt, PRUSS_MII_RT_TX_IPG0, val); + } +} + +void icssg_mii_update_mtu(struct regmap *mii_rt, int mii, int mtu) +{ + mtu += (ETH_HLEN + ETH_FCS_LEN); + if (mii == ICSS_MII0) { + regmap_update_bits(mii_rt, + PRUSS_MII_RT_RX_FRMS0, + PRUSS_MII_RT_RX_FRMS_MAX_FRM_MASK, + (mtu - 1) << PRUSS_MII_RT_RX_FRMS_MAX_FRM_SHIFT); + } else { + regmap_update_bits(mii_rt, + PRUSS_MII_RT_RX_FRMS1, + PRUSS_MII_RT_RX_FRMS_MAX_FRM_MASK, + (mtu - 1) << PRUSS_MII_RT_RX_FRMS_MAX_FRM_SHIFT); + } +} + +void icssg_update_rgmii_cfg(struct regmap *miig_rt, struct prueth_emac *emac) +{ + u32 gig_en_mask, gig_val = 0, full_duplex_mask, full_duplex_val = 0; + int slice = prueth_emac_slice(emac); + u32 inband_en_mask, inband_val = 0; + + gig_en_mask = (slice == ICSS_MII0) ? RGMII_CFG_GIG_EN_MII0 : + RGMII_CFG_GIG_EN_MII1; + if (emac->speed == SPEED_1000) + gig_val = gig_en_mask; + regmap_update_bits(miig_rt, RGMII_CFG_OFFSET, gig_en_mask, gig_val); + + inband_en_mask = (slice == ICSS_MII0) ? RGMII_CFG_INBAND_EN_MII0 : + RGMII_CFG_INBAND_EN_MII1; + if (emac->speed == SPEED_10 && phy_interface_mode_is_rgmii(emac->phy_if)) + inband_val = inband_en_mask; + regmap_update_bits(miig_rt, RGMII_CFG_OFFSET, inband_en_mask, inband_val); + + full_duplex_mask = (slice == ICSS_MII0) ? RGMII_CFG_FULL_DUPLEX_MII0 : + RGMII_CFG_FULL_DUPLEX_MII1; + if (emac->duplex == DUPLEX_FULL) + full_duplex_val = full_duplex_mask; + regmap_update_bits(miig_rt, RGMII_CFG_OFFSET, full_duplex_mask, + full_duplex_val); +} + +void icssg_miig_set_interface_mode(struct regmap *miig_rt, int mii, phy_interface_t phy_if) +{ + u32 val, mask, shift; + + mask = mii == ICSS_MII0 ? ICSSG_CFG_MII0_MODE : ICSSG_CFG_MII1_MODE; + shift = mii == ICSS_MII0 ? ICSSG_CFG_MII0_MODE_SHIFT : ICSSG_CFG_MII1_MODE_SHIFT; + + val = MII_MODE_RGMII; + if (phy_if == PHY_INTERFACE_MODE_MII) + val = MII_MODE_MII; + + val <<= shift; + regmap_update_bits(miig_rt, ICSSG_CFG_OFFSET, mask, val); + regmap_read(miig_rt, ICSSG_CFG_OFFSET, &val); +} + +u32 icssg_rgmii_cfg_get_bitfield(struct regmap *miig_rt, u32 mask, u32 shift) +{ + u32 val; + + regmap_read(miig_rt, RGMII_CFG_OFFSET, &val); + val &= mask; + val >>= shift; + + return val; +} + +u32 icssg_rgmii_get_speed(struct regmap *miig_rt, int mii) +{ + u32 shift = RGMII_CFG_SPEED_MII0_SHIFT, mask = RGMII_CFG_SPEED_MII0; + + if (mii == ICSS_MII1) { + shift = RGMII_CFG_SPEED_MII1_SHIFT; + mask = RGMII_CFG_SPEED_MII1; + } + + return icssg_rgmii_cfg_get_bitfield(miig_rt, mask, shift); +} + +u32 icssg_rgmii_get_fullduplex(struct regmap *miig_rt, int mii) +{ + u32 shift = RGMII_CFG_FULLDUPLEX_MII0_SHIFT; + u32 mask = RGMII_CFG_FULLDUPLEX_MII0; + + if (mii == ICSS_MII1) { + shift = RGMII_CFG_FULLDUPLEX_MII1_SHIFT; + mask = RGMII_CFG_FULLDUPLEX_MII1; + } + + return icssg_rgmii_cfg_get_bitfield(miig_rt, mask, shift); +} diff --git a/drivers/net/ethernet/ti/icssg_mii_rt.h b/drivers/net/ethernet/ti/icssg_mii_rt.h new file mode 100644 index 000000000000..55a59bf5299c --- /dev/null +++ b/drivers/net/ethernet/ti/icssg_mii_rt.h @@ -0,0 +1,151 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +/* PRU-ICSS MII_RT register definitions + * + * Copyright (C) 2015-2022 Texas Instruments Incorporated - https://www.ti.com + */ + +#ifndef __NET_PRUSS_MII_RT_H__ +#define __NET_PRUSS_MII_RT_H__ + +#include <linux/if_ether.h> +#include <linux/phy.h> + +/* PRUSS_MII_RT Registers */ +#define PRUSS_MII_RT_RXCFG0 0x0 +#define PRUSS_MII_RT_RXCFG1 0x4 +#define PRUSS_MII_RT_TXCFG0 0x10 +#define PRUSS_MII_RT_TXCFG1 0x14 +#define PRUSS_MII_RT_TX_CRC0 0x20 +#define PRUSS_MII_RT_TX_CRC1 0x24 +#define PRUSS_MII_RT_TX_IPG0 0x30 +#define PRUSS_MII_RT_TX_IPG1 0x34 +#define PRUSS_MII_RT_PRS0 0x38 +#define PRUSS_MII_RT_PRS1 0x3c +#define PRUSS_MII_RT_RX_FRMS0 0x40 +#define PRUSS_MII_RT_RX_FRMS1 0x44 +#define PRUSS_MII_RT_RX_PCNT0 0x48 +#define PRUSS_MII_RT_RX_PCNT1 0x4c +#define PRUSS_MII_RT_RX_ERR0 0x50 +#define PRUSS_MII_RT_RX_ERR1 0x54 + +/* PRUSS_MII_RT_RXCFG0/1 bits */ +#define PRUSS_MII_RT_RXCFG_RX_ENABLE BIT(0) +#define PRUSS_MII_RT_RXCFG_RX_DATA_RDY_MODE_DIS BIT(1) +#define PRUSS_MII_RT_RXCFG_RX_CUT_PREAMBLE BIT(2) +#define PRUSS_MII_RT_RXCFG_RX_MUX_SEL BIT(3) +#define PRUSS_MII_RT_RXCFG_RX_L2_EN BIT(4) +#define PRUSS_MII_RT_RXCFG_RX_BYTE_SWAP BIT(5) +#define PRUSS_MII_RT_RXCFG_RX_AUTO_FWD_PRE BIT(6) +#define PRUSS_MII_RT_RXCFG_RX_L2_EOF_SCLR_DIS BIT(9) + +/* PRUSS_MII_RT_TXCFG0/1 bits */ +#define PRUSS_MII_RT_TXCFG_TX_ENABLE BIT(0) +#define PRUSS_MII_RT_TXCFG_TX_AUTO_PREAMBLE BIT(1) +#define PRUSS_MII_RT_TXCFG_TX_EN_MODE BIT(2) +#define PRUSS_MII_RT_TXCFG_TX_BYTE_SWAP BIT(3) +#define PRUSS_MII_RT_TXCFG_TX_MUX_SEL BIT(8) +#define PRUSS_MII_RT_TXCFG_PRE_TX_AUTO_SEQUENCE BIT(9) +#define PRUSS_MII_RT_TXCFG_PRE_TX_AUTO_ESC_ERR BIT(10) +#define PRUSS_MII_RT_TXCFG_TX_32_MODE_EN BIT(11) +#define PRUSS_MII_RT_TXCFG_TX_IPG_WIRE_CLK_EN BIT(12) /* SR2.0 onwards */ + +#define PRUSS_MII_RT_TXCFG_TX_START_DELAY_SHIFT 16 +#define PRUSS_MII_RT_TXCFG_TX_START_DELAY_MASK GENMASK(25, 16) + +#define PRUSS_MII_RT_TXCFG_TX_CLK_DELAY_SHIFT 28 +#define PRUSS_MII_RT_TXCFG_TX_CLK_DELAY_MASK GENMASK(30, 28) + +/* PRUSS_MII_RT_TX_IPG0/1 bits */ +#define PRUSS_MII_RT_TX_IPG_IPG_SHIFT 0 +#define PRUSS_MII_RT_TX_IPG_IPG_MASK GENMASK(9, 0) + +/* PRUSS_MII_RT_PRS0/1 bits */ +#define PRUSS_MII_RT_PRS_COL BIT(0) +#define PRUSS_MII_RT_PRS_CRS BIT(1) + +/* PRUSS_MII_RT_RX_FRMS0/1 bits */ +#define PRUSS_MII_RT_RX_FRMS_MIN_FRM_SHIFT 0 +#define PRUSS_MII_RT_RX_FRMS_MIN_FRM_MASK GENMASK(15, 0) + +#define PRUSS_MII_RT_RX_FRMS_MAX_FRM_SHIFT 16 +#define PRUSS_MII_RT_RX_FRMS_MAX_FRM_MASK GENMASK(31, 16) + +/* Min/Max in MII_RT_RX_FRMS */ +/* For EMAC and Switch */ +#define PRUSS_MII_RT_RX_FRMS_MAX (VLAN_ETH_FRAME_LEN + ETH_FCS_LEN) +#define PRUSS_MII_RT_RX_FRMS_MIN_FRM (64) + +/* for HSR and PRP */ +#define PRUSS_MII_RT_RX_FRMS_MAX_FRM_LRE (PRUSS_MII_RT_RX_FRMS_MAX + \ + ICSS_LRE_TAG_RCT_SIZE) +/* PRUSS_MII_RT_RX_PCNT0/1 bits */ +#define PRUSS_MII_RT_RX_PCNT_MIN_PCNT_SHIFT 0 +#define PRUSS_MII_RT_RX_PCNT_MIN_PCNT_MASK GENMASK(3, 0) + +#define PRUSS_MII_RT_RX_PCNT_MAX_PCNT_SHIFT 4 +#define PRUSS_MII_RT_RX_PCNT_MAX_PCNT_MASK GENMASK(7, 4) + +/* PRUSS_MII_RT_RX_ERR0/1 bits */ +#define PRUSS_MII_RT_RX_ERR_MIN_PCNT_ERR BIT(0) +#define PRUSS_MII_RT_RX_ERR_MAX_PCNT_ERR BIT(1) +#define PRUSS_MII_RT_RX_ERR_MIN_FRM_ERR BIT(2) +#define PRUSS_MII_RT_RX_ERR_MAX_FRM_ERR BIT(3) + +#define ICSSG_CFG_OFFSET 0 +#define RGMII_CFG_OFFSET 4 + +/* Constant to choose between MII0 and MII1 */ +#define ICSS_MII0 0 +#define ICSS_MII1 1 + +/* ICSSG_CFG Register bits */ +#define ICSSG_CFG_SGMII_MODE BIT(16) +#define ICSSG_CFG_TX_PRU_EN BIT(11) +#define ICSSG_CFG_RX_SFD_TX_SOF_EN BIT(10) +#define ICSSG_CFG_RTU_PRU_PSI_SHARE_EN BIT(9) +#define ICSSG_CFG_IEP1_TX_EN BIT(8) +#define ICSSG_CFG_MII1_MODE GENMASK(6, 5) +#define ICSSG_CFG_MII1_MODE_SHIFT 5 +#define ICSSG_CFG_MII0_MODE GENMASK(4, 3) +#define ICSSG_CFG_MII0_MODE_SHIFT 3 +#define ICSSG_CFG_RX_L2_G_EN BIT(2) +#define ICSSG_CFG_TX_L2_EN BIT(1) +#define ICSSG_CFG_TX_L1_EN BIT(0) + +enum mii_mode { + MII_MODE_MII = 0, + MII_MODE_RGMII +}; + +/* RGMII CFG Register bits */ +#define RGMII_CFG_INBAND_EN_MII0 BIT(16) +#define RGMII_CFG_GIG_EN_MII0 BIT(17) +#define RGMII_CFG_INBAND_EN_MII1 BIT(20) +#define RGMII_CFG_GIG_EN_MII1 BIT(21) +#define RGMII_CFG_FULL_DUPLEX_MII0 BIT(18) +#define RGMII_CFG_FULL_DUPLEX_MII1 BIT(22) +#define RGMII_CFG_SPEED_MII0 GENMASK(2, 1) +#define RGMII_CFG_SPEED_MII1 GENMASK(6, 5) +#define RGMII_CFG_SPEED_MII0_SHIFT 1 +#define RGMII_CFG_SPEED_MII1_SHIFT 5 +#define RGMII_CFG_FULLDUPLEX_MII0 BIT(3) +#define RGMII_CFG_FULLDUPLEX_MII1 BIT(7) +#define RGMII_CFG_FULLDUPLEX_MII0_SHIFT 3 +#define RGMII_CFG_FULLDUPLEX_MII1_SHIFT 7 +#define RGMII_CFG_SPEED_10M 0 +#define RGMII_CFG_SPEED_100M 1 +#define RGMII_CFG_SPEED_1G 2 + +struct regmap; +struct prueth_emac; + +void icssg_mii_update_ipg(struct regmap *mii_rt, int mii, u32 ipg); +void icssg_mii_update_mtu(struct regmap *mii_rt, int mii, int mtu); +void icssg_update_rgmii_cfg(struct regmap *miig_rt, struct prueth_emac *emac); +u32 icssg_rgmii_cfg_get_bitfield(struct regmap *miig_rt, u32 mask, u32 shift); +u32 icssg_rgmii_get_speed(struct regmap *miig_rt, int mii); +u32 icssg_rgmii_get_fullduplex(struct regmap *miig_rt, int mii); +void icssg_miig_set_interface_mode(struct regmap *miig_rt, int mii, phy_interface_t phy_if); + +#endif /* __NET_PRUSS_MII_RT_H__ */ diff --git a/drivers/net/ethernet/ti/icssg_prueth.h b/drivers/net/ethernet/ti/icssg_prueth.h new file mode 100644 index 000000000000..8512f19a9b4d --- /dev/null +++ b/drivers/net/ethernet/ti/icssg_prueth.h @@ -0,0 +1,197 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Texas Instruments ICSSG Ethernet driver + * + * Copyright (C) 2018-2022 Texas Instruments Incorporated - https://www.ti.com/ + * + */ + +#ifndef __NET_TI_ICSSG_PRUETH_H +#define __NET_TI_ICSSG_PRUETH_H + +#include <linux/etherdevice.h> +#include <linux/genalloc.h> +#include <linux/if_vlan.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/mfd/syscon.h> +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/net_tstamp.h> +#include <linux/of.h> +#include <linux/of_irq.h> +#include <linux/of_mdio.h> +#include <linux/of_net.h> +#include <linux/of_platform.h> +#include <linux/phy.h> +#include <linux/remoteproc/pruss.h> +#include <linux/pruss_driver.h> +#include <linux/ptp_clock_kernel.h> +#include <linux/remoteproc.h> + +#include <linux/dma-mapping.h> +#include <linux/dma/ti-cppi5.h> +#include <linux/dma/k3-udma-glue.h> + +#include <net/devlink.h> + +#include "icssg_switch_map.h" + +#define ICSS_SLICE0 0 +#define ICSS_SLICE1 1 + +#define ICSSG_MAX_RFLOWS 8 /* per slice */ + +/* In switch mode there are 3 real ports i.e. 3 mac addrs. + * however Linux sees only the host side port. The other 2 ports + * are the switch ports. + * In emac mode there are 2 real ports i.e. 2 mac addrs. + * Linux sees both the ports. + */ +enum prueth_port { + PRUETH_PORT_HOST = 0, /* host side port */ + PRUETH_PORT_MII0, /* physical port RG/SG MII 0 */ + PRUETH_PORT_MII1, /* physical port RG/SG MII 1 */ + PRUETH_PORT_INVALID, /* Invalid prueth port */ +}; + +enum prueth_mac { + PRUETH_MAC0 = 0, + PRUETH_MAC1, + PRUETH_NUM_MACS, + PRUETH_MAC_INVALID, +}; + +struct prueth_tx_chn { + struct device *dma_dev; + struct napi_struct napi_tx; + struct k3_cppi_desc_pool *desc_pool; + struct k3_udma_glue_tx_channel *tx_chn; + struct prueth_emac *emac; + u32 id; + u32 descs_num; + unsigned int irq; + char name[32]; +}; + +struct prueth_rx_chn { + struct device *dev; + struct device *dma_dev; + struct k3_cppi_desc_pool *desc_pool; + struct k3_udma_glue_rx_channel *rx_chn; + u32 descs_num; + unsigned int irq[ICSSG_MAX_RFLOWS]; /* separate irq per flow */ + char name[32]; +}; + +/* There are 4 Tx DMA channels, but the highest priority is CH3 (thread 3) + * and lower three are lower priority channels or threads. + */ +#define PRUETH_MAX_TX_QUEUES 4 + +/* data for each emac port */ +struct prueth_emac { + bool fw_running; + struct prueth *prueth; + struct net_device *ndev; + u8 mac_addr[6]; + struct napi_struct napi_rx; + u32 msg_enable; + + int link; + int speed; + int duplex; + + const char *phy_id; + struct device_node *phy_node; + phy_interface_t phy_if; + enum prueth_port port_id; + + /* DMA related */ + struct prueth_tx_chn tx_chns[PRUETH_MAX_TX_QUEUES]; + struct completion tdown_complete; + atomic_t tdown_cnt; + struct prueth_rx_chn rx_chns; + int rx_flow_id_base; + int tx_ch_num; + + spinlock_t lock; /* serialize access */ + + unsigned long state; + struct completion cmd_complete; + /* Mutex to serialize access to firmware command interface */ + struct mutex cmd_lock; + struct work_struct rx_mode_work; + struct workqueue_struct *cmd_wq; + + struct pruss_mem_region dram; +}; + +/** + * struct prueth_pdata - PRUeth platform data + * @fdqring_mode: Free desc queue mode + * @quirk_10m_link_issue: 10M link detect errata + */ +struct prueth_pdata { + enum k3_ring_mode fdqring_mode; + u32 quirk_10m_link_issue:1; +}; + +/** + * struct prueth - PRUeth structure + * @dev: device + * @pruss: pruss handle + * @pru: rproc instances of PRUs + * @rtu: rproc instances of RTUs + * @txpru: rproc instances of TX_PRUs + * @shram: PRUSS shared RAM region + * @sram_pool: MSMC RAM pool for buffers + * @msmcram: MSMC RAM region + * @eth_node: DT node for the port + * @emac: private EMAC data structure + * @registered_netdevs: list of registered netdevs + * @miig_rt: regmap to mii_g_rt block + * @mii_rt: regmap to mii_rt block + * @pru_id: ID for each of the PRUs + * @pdev: pointer to ICSSG platform device + * @pdata: pointer to platform data for ICSSG driver + * @icssg_hwcmdseq: seq counter or HWQ messages + * @emacs_initialized: num of EMACs/ext ports that are up/running + */ +struct prueth { + struct device *dev; + struct pruss *pruss; + struct rproc *pru[PRUSS_NUM_PRUS]; + struct rproc *rtu[PRUSS_NUM_PRUS]; + struct rproc *txpru[PRUSS_NUM_PRUS]; + struct pruss_mem_region shram; + struct gen_pool *sram_pool; + struct pruss_mem_region msmcram; + + struct device_node *eth_node[PRUETH_NUM_MACS]; + struct prueth_emac *emac[PRUETH_NUM_MACS]; + struct net_device *registered_netdevs[PRUETH_NUM_MACS]; + struct regmap *miig_rt; + struct regmap *mii_rt; + + enum pruss_pru_id pru_id[PRUSS_NUM_PRUS]; + struct platform_device *pdev; + struct prueth_pdata pdata; + u8 icssg_hwcmdseq; + + int emacs_initialized; +}; + +/* get PRUSS SLICE number from prueth_emac */ +static inline int prueth_emac_slice(struct prueth_emac *emac) +{ + switch (emac->port_id) { + case PRUETH_PORT_MII0: + return ICSS_SLICE0; + case PRUETH_PORT_MII1: + return ICSS_SLICE1; + default: + return -EINVAL; + } +} + +#endif /* __NET_TI_ICSSG_PRUETH_H */ -- 2.34.1
