From: Phong Hoang phong.hoang.wz@renesas.com
This patch adds Ethernet Switch support that found on R-Car S4 (r8a779f0) SoC. This is extracted from multiple patches from downstream BSP, with additional rework of the network device registration.
Signed-off-by: Hai Pham hai.pham.ud@renesas.com Signed-off-by: Marek Vasut marek.vasut+renesas@mailbox.org Signed-off-by: Phong Hoang phong.hoang.wz@renesas.com Signed-off-by: Takeshi Kihara takeshi.kihara.df@renesas.com [Marek: Rework the driver to support all ports via subdrivers. Split the driver up, add generic PHY framework support. Generic code clean ups.] --- Cc: Hai Pham hai.pham.ud@renesas.com Cc: Joe Hershberger joe.hershberger@ni.com Cc: Marek Vasut marek.vasut+renesas@mailbox.org Cc: Peng Fan peng.fan@nxp.com Cc: Ramon Fried rfried.dev@gmail.com Cc: Simon Glass sjg@chromium.org --- drivers/net/Kconfig | 8 + drivers/net/Makefile | 1 + drivers/net/rswitch.c | 1139 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 1148 insertions(+) create mode 100644 drivers/net/rswitch.c
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig index 5c29e63d0be..09039a283eb 100644 --- a/drivers/net/Kconfig +++ b/drivers/net/Kconfig @@ -752,6 +752,14 @@ config GMAC_ROCKCHIP This driver provides Rockchip SoCs network support based on the Synopsys Designware driver.
+config RENESAS_ETHER_SWITCH + bool "Renesas Ethernet Switch support" + depends on DM_ETH && R8A779F0 + select PHYLIB + help + This driver implements support for the Renesas Ethernet Switch + which is available on R-Car S4 SoC (r8a779f0). + config RENESAS_RAVB bool "Renesas Ethernet AVB MAC" depends on RCAR_64 diff --git a/drivers/net/Makefile b/drivers/net/Makefile index 75daa5e694c..46a40e2ed9f 100644 --- a/drivers/net/Makefile +++ b/drivers/net/Makefile @@ -76,6 +76,7 @@ obj-$(CONFIG_OCTEONTX_SMI) += octeontx/smi.o obj-$(CONFIG_PCH_GBE) += pch_gbe.o obj-$(CONFIG_PCNET) += pcnet.o obj-$(CONFIG_PIC32_ETH) += pic32_mdio.o pic32_eth.o +obj-$(CONFIG_RENESAS_ETHER_SWITCH) += rswitch.o obj-$(CONFIG_RENESAS_RAVB) += ravb.o obj-$(CONFIG_RTL8139) += rtl8139.o obj-$(CONFIG_RTL8169) += rtl8169.o diff --git a/drivers/net/rswitch.c b/drivers/net/rswitch.c new file mode 100644 index 00000000000..5a69ca1a0f9 --- /dev/null +++ b/drivers/net/rswitch.c @@ -0,0 +1,1139 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Driver for Renesas Ethernet RSwitch2 (Ethernet-TSN). + * + * Copyright (C) 2021 Renesas Electronics Corporation + * + * Based on the Renesas Ethernet AVB driver. + */ + +#include <asm/io.h> +#include <clk.h> +#include <common.h> +#include <dm.h> +#include <dm/device-internal.h> +#include <dm/device_compat.h> +#include <dm/lists.h> +#include <errno.h> +#include <generic-phy.h> +#include <linux/bitops.h> +#include <linux/delay.h> +#include <linux/iopoll.h> +#include <linux/mii.h> +#include <eth_phy.h> +#include <log.h> +#include <malloc.h> +#include <miiphy.h> + +#define RSWITCH_SLEEP_US 1000 +#define RSWITCH_TIMEOUT_US 1000000 + +#define RSWITCH_NUM_HW 5 + +#define ETHA_TO_GWCA(i) ((i) % 2) +#define GWCA_TO_HW_INDEX(i) ((i) + 3) +#define HW_INDEX_TO_GWCA(i) ((i) - 3) + +#define RSWITCH_MAX_CTAG_PCP 7 + +/* Registers */ +#define RSWITCH_COMA_OFFSET 0x00009000 +#define RSWITCH_ETHA_OFFSET 0x0000a000 /* with RMAC */ +#define RSWITCH_ETHA_SIZE 0x00002000 /* with RMAC */ +#define RSWITCH_GWCA_OFFSET 0x00010000 +#define RSWITCH_GWCA_SIZE 0x00002000 + +#define FWRO 0 +#define CARO RSWITCH_COMA_OFFSET +#define GWRO 0 +#define TARO 0 +#define RMRO 0x1000 + +enum rswitch_reg { + EAMC = TARO + 0x0000, + EAMS = TARO + 0x0004, + EATDQDC = TARO + 0x0060, + EATTFC = TARO + 0x0138, + EATASRIRM = TARO + 0x03E4, + + GWMC = GWRO + 0x0000, + GWMS = GWRO + 0x0004, + GWMTIRM = GWRO + 0x0100, + GWVCC = GWRO + 0x0130, + GWTTFC = GWRO + 0x0138, + GWDCBAC0 = GWRO + 0x0194, + GWDCBAC1 = GWRO + 0x0198, + GWTRC = GWRO + 0x0200, + GWARIRM = GWRO + 0x0380, + GWDCC = GWRO + 0x0400, + + RRC = CARO + 0x0004, + RCEC = CARO + 0x0008, + RCDC = CARO + 0x000C, + CABPIRM = CARO + 0x0140, + + FWPC0 = FWRO + 0x0100, + FWPBFC = FWRO + 0x4A00, + FWPBFCSDC = FWRO + 0x4A04, + + MPSM = RMRO + 0x0000, + MPIC = RMRO + 0x0004, + MRMAC0 = RMRO + 0x0084, + MRMAC1 = RMRO + 0x0088, + MRAFC = RMRO + 0x008C, + MRSCE = RMRO + 0x0090, + MRSCP = RMRO + 0x0094, + MLVC = RMRO + 0x0180, + MLBC = RMRO + 0x0188, + MXGMIIC = RMRO + 0x0190, + MPCH = RMRO + 0x0194, + MANM = RMRO + 0x019C, + MMIS0 = RMRO + 0x0210, + MMIS1 = RMRO + 0x0220, +}; + +/* COMA */ +#define RRC_RR BIT(0) +#define RCEC_RCE BIT(16) + +#define CABPIRM_BPIOG BIT(0) +#define CABPIRM_BPR BIT(1) + +/* MFWD */ +#define FWPC0(i) (FWPC0 + (i) * 0x10) +#define FWPC0_LTHTA BIT(0) +#define FWPC0_IP4UE BIT(3) +#define FWPC0_IP4TE BIT(4) +#define FWPC0_IP4OE BIT(5) +#define FWPC0_L2SE BIT(9) +#define FWPC0_IP4EA BIT(10) +#define FWPC0_IPDSA BIT(12) +#define FWPC0_IPHLA BIT(18) +#define FWPC0_MACSDA BIT(20) +#define FWPC0_MACHLA BIT(26) +#define FWPC0_MACHMA BIT(27) +#define FWPC0_VLANSA BIT(28) + +#define FWPC0_DEFAULT (FWPC0_LTHTA | FWPC0_IP4UE | FWPC0_IP4TE | \ + FWPC0_IP4OE | FWPC0_L2SE | FWPC0_IP4EA | \ + FWPC0_IPDSA | FWPC0_IPHLA | FWPC0_MACSDA | \ + FWPC0_MACHLA | FWPC0_MACHMA | FWPC0_VLANSA) + +#define FWPBFC(i) (FWPBFC + (i) * 0x10) +#define FWPBFCSDC(j, i) (FWPBFCSDC + (i) * 0x10 + (j) * 0x04) + +/* ETHA */ +#define EATASRIRM_TASRIOG BIT(0) +#define EATASRIRM_TASRR BIT(1) +#define EATDQDC(q) (EATDQDC + (q) * 0x04) +#define EATDQDC_DQD (0xff) + +/* RMAC */ +#define MPIC_PIS_GMII 0x02 +#define MPIC_LSC_MASK (0x07 << 3) +#define MPIC_LSC_100 (0x01 << 3) +#define MPIC_LSC_1000 (0x02 << 3) +#define MPIC_LSC_2500 (0x03 << 3) +#define MLVC_PLV BIT(16) +#define MLVC_LVT 0x09 +#define MMIS0_LVSS 0x02 + +#define MPIC_PSMCS_MASK (0x7f << 16) +#define MPIC_PSMHT_MASK (0x06 << 24) +#define MPIC_MDC_CLK_SET (0x06050000) + +#define MPSM_MFF_C45 BIT(2) +#define MPSM_MFF_C22 0x0 +#define MPSM_PSME BIT(0) + +#define MDIO_READ_C45 0x03 +#define MDIO_WRITE_C45 0x01 +#define MDIO_ADDR_C45 0x00 + +#define MDIO_READ_C22 0x02 +#define MDIO_WRITE_C22 0x01 + +#define MPSM_POP_MASK (0x03 << 13) +#define MPSM_PRA_MASK (0x1f << 8) +#define MPSM_PDA_MASK (0x1f << 3) +#define MPSM_PRD_MASK (0xffff << 16) + +/* Completion flags */ +#define MMIS1_PAACS BIT(2) /* Address */ +#define MMIS1_PWACS BIT(1) /* Write */ +#define MMIS1_PRACS BIT(0) /* Read */ +#define MMIS1_CLEAR_FLAGS 0xf + +/* ETHA */ +enum rswitch_etha_mode { + EAMC_OPC_RESET, + EAMC_OPC_DISABLE, + EAMC_OPC_CONFIG, + EAMC_OPC_OPERATION, +}; + +#define EAMS_OPS_MASK EAMC_OPC_OPERATION + +/* GWCA */ +enum rswitch_gwca_mode { + GWMC_OPC_RESET, + GWMC_OPC_DISABLE, + GWMC_OPC_CONFIG, + GWMC_OPC_OPERATION, +}; + +#define GWMS_OPS_MASK GWMC_OPC_OPERATION + +#define GWMTIRM_MTIOG BIT(0) +#define GWMTIRM_MTR BIT(1) +#define GWARIRM_ARIOG BIT(0) +#define GWARIRM_ARR BIT(1) +#define GWVCC_VEM_SC_TAG (0x3 << 16) +#define GWDCBAC0_DCBAUP (0xff) +#define GWTRC(i) (GWTRC + (i) * 0x04) +#define GWDCC(i) (GWDCC + (i) * 0x04) +#define GWDCC_DQT BIT(11) +#define GWDCC_BALR BIT(24) + +struct rswitch_etha { + int index; + void __iomem *addr; + struct phy_device *phydev; + struct mii_dev *bus; + unsigned char *enetaddr; +}; + +struct rswitch_gwca { + int index; + void __iomem *addr; + int num_chain; +}; + +/* Setting value */ +#define LINK_SPEED_100 100 +#define LINK_SPEED_1000 1000 +#define LINK_SPEED_2500 2500 + +/* Decriptor */ +#define RSWITCH_NUM_BASE_DESC 2 +#define RSWITCH_TX_CHAIN_INDEX 0 +#define RSWITCH_RX_CHAIN_INDEX 1 +#define RSWITCH_NUM_TX_DESC 8 +#define RSWITCH_NUM_RX_DESC 8 + +enum RX_DS_CC_BIT { + RX_DS = 0x0fff, /* Data size */ + RX_TR = 0x1000, /* Truncation indication */ + RX_EI = 0x2000, /* Error indication */ + RX_PS = 0xc000, /* Padding selection */ +}; + +enum DIE_DT { + /* Frame data */ + DT_FSINGLE = 0x80, + DT_FSTART = 0x90, + DT_FMID = 0xa0, + DT_FEND = 0xb8, + + /* Chain control */ + DT_LEMPTY = 0xc0, + DT_EEMPTY = 0xd0, + DT_LINKFIX = 0x00, + DT_LINK = 0xe0, + DT_EOS = 0xf0, + /* HW/SW arbitration */ + DT_FEMPTY = 0x40, + DT_FEMPTY_IS = 0x10, + DT_FEMPTY_IC = 0x20, + DT_FEMPTY_ND = 0x38, + DT_FEMPTY_START = 0x50, + DT_FEMPTY_MID = 0x60, + DT_FEMPTY_END = 0x70, + + DT_MASK = 0xf0, + DIE = 0x08, /* Descriptor Interrupt Enable */ +}; + +struct rswitch_desc { + __le16 info_ds; /* Descriptor size */ + u8 die_dt; /* Descriptor interrupt enable and type */ + __u8 dptrh; /* Descriptor pointer MSB */ + __le32 dptrl; /* Descriptor pointer LSW */ +} __packed; + +struct rswitch_rxdesc { + struct rswitch_desc data; + struct rswitch_desc link; + u8 __pad[48]; + u8 packet[PKTSIZE_ALIGN]; +} __packed; + +struct rswitch_port_priv { + void __iomem *addr; + struct phy serdes; + struct rswitch_etha etha; + struct rswitch_gwca gwca; + struct rswitch_desc bat_desc[RSWITCH_NUM_BASE_DESC]; + struct rswitch_desc tx_desc[RSWITCH_NUM_TX_DESC]; + struct rswitch_rxdesc rx_desc[RSWITCH_NUM_RX_DESC]; + u32 rx_desc_index; + u32 tx_desc_index; +}; + +struct rswitch_priv { + void __iomem *addr; + struct clk *rsw_clk; +}; + +static inline void rswitch_flush_dcache(u32 addr, u32 len) +{ + flush_dcache_range(addr, addr + len); +} + +static inline void rswitch_invalidate_dcache(u32 addr, u32 len) +{ + u32 start = addr & ~((uintptr_t)ARCH_DMA_MINALIGN - 1); + u32 end = roundup(addr + len, ARCH_DMA_MINALIGN); + + invalidate_dcache_range(start, end); +} + +static void rswitch_agent_clock_ctrl(struct rswitch_port_priv *priv, int port, int enable) +{ + u32 val; + + if (enable) { + val = readl(priv->addr + RCEC); + if ((val & (RCEC_RCE | BIT(port))) != (RCEC_RCE | BIT(port))) + writel(val | RCEC_RCE | BIT(port), priv->addr + RCEC); + } else { + setbits_le32(priv->addr + RCDC, BIT(port)); + } +} + +static int rswitch_etha_change_mode(struct rswitch_port_priv *priv, + enum rswitch_etha_mode mode) +{ + struct rswitch_etha *etha = &priv->etha; + u32 pval; + int ret; + + /* Enable clock */ + rswitch_agent_clock_ctrl(priv, etha->index, 1); + + writel(mode, etha->addr + EAMC); + + ret = readl_poll_sleep_timeout(etha->addr + EAMS, pval, + (pval & EAMS_OPS_MASK) == mode, + RSWITCH_SLEEP_US, RSWITCH_TIMEOUT_US); + + /* Disable clock */ + if (mode == EAMC_OPC_DISABLE) + rswitch_agent_clock_ctrl(priv, etha->index, 0); + + return ret; +} + +static int rswitch_gwca_change_mode(struct rswitch_port_priv *priv, + enum rswitch_gwca_mode mode) +{ + struct rswitch_gwca *gwca = &priv->gwca; + u32 pval; + int ret; + + /* Enable clock */ + rswitch_agent_clock_ctrl(priv, gwca->index, 1); + + writel(mode, gwca->addr + GWMC); + + ret = readl_poll_sleep_timeout(gwca->addr + GWMS, pval, + (pval & GWMS_OPS_MASK) == mode, + RSWITCH_SLEEP_US, RSWITCH_TIMEOUT_US); + + /* Disable clock */ + if (mode == GWMC_OPC_DISABLE) + rswitch_agent_clock_ctrl(priv, gwca->index, 0); + + return ret; +} + +static int rswitch_mii_access_c45(struct rswitch_etha *etha, bool read, + int phyad, int devad, int regad, int data) +{ + u32 pval, val; + int ret; + + /* No match device */ + if (devad == 0xffffffff) + return 0; + + /* Clear completion flags */ + writel(MMIS1_CLEAR_FLAGS, etha->addr + MMIS1); + + /* Submit address to PHY (MDIO_ADDR_C45 << 13) */ + val = MPSM_PSME | MPSM_MFF_C45 | (devad << 8) | (phyad << 3); + writel((regad << 16) | val, etha->addr + MPSM); + + ret = readl_poll_sleep_timeout(etha->addr + MMIS1, pval, + pval & MMIS1_PAACS, + RSWITCH_SLEEP_US, RSWITCH_TIMEOUT_US); + if (ret) + return ret; + + /* Clear address completion flag */ + setbits_le32(etha->addr + MMIS1, MMIS1_PAACS); + + /* Read/Write PHY register */ + if (read) { + val |= MDIO_READ_C45 << 13; + writel(val, etha->addr + MPSM); + + ret = readl_poll_sleep_timeout(etha->addr + MMIS1, pval, + pval & MMIS1_PRACS, + RSWITCH_SLEEP_US, + RSWITCH_TIMEOUT_US); + if (ret) + return ret; + + /* Read data */ + ret = (readl(etha->addr + MPSM) & MPSM_PRD_MASK) >> 16; + + /* Clear read completion flag */ + setbits_le32(etha->addr + MMIS1, MMIS1_PRACS); + } else { + val |= MDIO_WRITE_C45 << 13; + val |= data << 16; + writel(val, etha->addr + MPSM); + + ret = readl_poll_sleep_timeout(etha->addr + MMIS1, pval, + pval & MMIS1_PWACS, + RSWITCH_SLEEP_US, + RSWITCH_TIMEOUT_US); + } + + return ret; +} + +static int rswitch_mii_read_c45(struct mii_dev *miidev, int phyad, int devad, int regad) +{ + struct rswitch_port_priv *priv = miidev->priv; + struct rswitch_etha *etha = &priv->etha; + int val; + int reg; + + /* Change to disable mode */ + rswitch_etha_change_mode(priv, EAMC_OPC_DISABLE); + + /* Change to config mode */ + rswitch_etha_change_mode(priv, EAMC_OPC_CONFIG); + + /* Enable Station Management clock */ + reg = readl(etha->addr + MPIC); + reg &= ~MPIC_PSMCS_MASK & ~MPIC_PSMHT_MASK; + writel(reg | MPIC_MDC_CLK_SET, etha->addr + MPIC); + + /* Set Station Management Mode : Clause 45 */ + setbits_le32(etha->addr + MPSM, MPSM_MFF_C45); + + /* Access PHY register */ + val = rswitch_mii_access_c45(etha, true, phyad, devad, regad, 0); + + /* Disable Station Management Clock */ + clrbits_le32(etha->addr + MPIC, MPIC_PSMCS_MASK); + + /* Change to disable mode */ + rswitch_etha_change_mode(priv, EAMC_OPC_DISABLE); + + return val; +} + +int rswitch_mii_write_c45(struct mii_dev *miidev, int phyad, int devad, int regad, u16 data) +{ + struct rswitch_port_priv *priv = miidev->priv; + struct rswitch_etha *etha = &priv->etha; + int reg; + + /* Change to disable mode */ + rswitch_etha_change_mode(priv, EAMC_OPC_DISABLE); + + /* Change to config mode */ + rswitch_etha_change_mode(priv, EAMC_OPC_CONFIG); + + /* Enable Station Management clock */ + reg = readl(etha->addr + MPIC); + reg &= ~MPIC_PSMCS_MASK & ~MPIC_PSMHT_MASK; + writel(reg | MPIC_MDC_CLK_SET, etha->addr + MPIC); + + /* Set Station Management Mode : Clause 45 */ + setbits_le32(etha->addr + MPSM, MPSM_MFF_C45); + + /* Access PHY register */ + rswitch_mii_access_c45(etha, false, phyad, devad, regad, data); + + /* Disable Station Management Clock */ + clrbits_le32(etha->addr + MPIC, MPIC_PSMCS_MASK); + + /* Change to disable mode */ + rswitch_etha_change_mode(priv, EAMC_OPC_DISABLE); + + return 0; +} + +static int rswitch_check_link(struct rswitch_etha *etha) +{ + u32 pval; + int ret; + + /* Request Link Verification */ + writel(MLVC_PLV, etha->addr + MLVC); + + /* Complete Link Verification */ + ret = readl_poll_sleep_timeout(etha->addr + MLVC, pval, + !(pval & MLVC_PLV), + RSWITCH_SLEEP_US, RSWITCH_TIMEOUT_US); + if (ret) { + debug("\n%s: Link verification timeout!", __func__); + return ret; + } + + return 0; +} + +static int rswitch_reset(struct rswitch_port_priv *priv) +{ + int ret; + + setbits_le32(priv->addr + RRC, RRC_RR); + clrbits_le32(priv->addr + RRC, RRC_RR); + + ret = rswitch_gwca_change_mode(priv, GWMC_OPC_DISABLE); + if (ret) + return ret; + + ret = rswitch_etha_change_mode(priv, EAMC_OPC_DISABLE); + if (ret) + return ret; + + return 0; +} + +static void rswitch_bat_desc_init(struct rswitch_port_priv *priv) +{ + const u32 desc_size = RSWITCH_NUM_BASE_DESC * sizeof(struct rswitch_desc); + int i; + + /* Initialize all descriptors */ + memset(priv->bat_desc, 0x0, desc_size); + + for (i = 0; i < RSWITCH_NUM_BASE_DESC; i++) + priv->bat_desc[i].die_dt = DT_EOS; + + rswitch_flush_dcache((uintptr_t)priv->bat_desc, desc_size); +} + +static void rswitch_tx_desc_init(struct rswitch_port_priv *priv) +{ + const u32 desc_size = RSWITCH_NUM_TX_DESC * sizeof(struct rswitch_desc); + u64 tx_desc_addr; + int i; + + /* Initialize all descriptor */ + memset(priv->tx_desc, 0x0, desc_size); + priv->tx_desc_index = 0; + + for (i = 0; i < RSWITCH_NUM_TX_DESC; i++) + priv->tx_desc[i].die_dt = DT_EEMPTY; + + /* Mark the end of the descriptors */ + priv->tx_desc[RSWITCH_NUM_TX_DESC - 1].die_dt = DT_LINKFIX; + tx_desc_addr = (uintptr_t)priv->tx_desc; + priv->tx_desc[RSWITCH_NUM_TX_DESC - 1].dptrl = lower_32_bits(tx_desc_addr); + priv->tx_desc[RSWITCH_NUM_TX_DESC - 1].dptrh = upper_32_bits(tx_desc_addr); + rswitch_flush_dcache(tx_desc_addr, desc_size); + + /* Point the controller to the TX descriptor list */ + priv->bat_desc[RSWITCH_TX_CHAIN_INDEX].die_dt = DT_LINKFIX; + priv->bat_desc[RSWITCH_TX_CHAIN_INDEX].dptrl = lower_32_bits(tx_desc_addr); + priv->bat_desc[RSWITCH_TX_CHAIN_INDEX].dptrh = upper_32_bits(tx_desc_addr); + rswitch_flush_dcache((uintptr_t)&priv->bat_desc[RSWITCH_TX_CHAIN_INDEX], + sizeof(struct rswitch_desc)); +} + +static void rswitch_rx_desc_init(struct rswitch_port_priv *priv) +{ + const u32 desc_size = RSWITCH_NUM_RX_DESC * sizeof(struct rswitch_rxdesc); + int i; + u64 packet_addr; + u64 next_rx_desc_addr; + u64 rx_desc_addr; + + /* Initialize all descriptor */ + memset(priv->rx_desc, 0x0, desc_size); + priv->rx_desc_index = 0; + + for (i = 0; i < RSWITCH_NUM_RX_DESC; i++) { + priv->rx_desc[i].data.die_dt = DT_EEMPTY; + priv->rx_desc[i].data.info_ds = PKTSIZE_ALIGN; + packet_addr = (uintptr_t)priv->rx_desc[i].packet; + priv->rx_desc[i].data.dptrl = lower_32_bits(packet_addr); + priv->rx_desc[i].data.dptrh = upper_32_bits(packet_addr); + + priv->rx_desc[i].link.die_dt = DT_LINKFIX; + next_rx_desc_addr = (uintptr_t)&priv->rx_desc[i + 1]; + priv->rx_desc[i].link.dptrl = lower_32_bits(next_rx_desc_addr); + priv->rx_desc[i].link.dptrh = upper_32_bits(next_rx_desc_addr); + } + + /* Mark the end of the descriptors */ + priv->rx_desc[RSWITCH_NUM_RX_DESC - 1].link.die_dt = DT_LINKFIX; + rx_desc_addr = (uintptr_t)priv->rx_desc; + priv->rx_desc[RSWITCH_NUM_RX_DESC - 1].link.dptrl = lower_32_bits(rx_desc_addr); + priv->rx_desc[RSWITCH_NUM_RX_DESC - 1].link.dptrh = upper_32_bits(rx_desc_addr); + rswitch_flush_dcache(rx_desc_addr, desc_size); + + /* Point the controller to the rx descriptor list */ + priv->bat_desc[RSWITCH_RX_CHAIN_INDEX].die_dt = DT_LINKFIX; + priv->bat_desc[RSWITCH_RX_CHAIN_INDEX].dptrl = lower_32_bits(rx_desc_addr); + priv->bat_desc[RSWITCH_RX_CHAIN_INDEX].dptrh = upper_32_bits(rx_desc_addr); + rswitch_flush_dcache((uintptr_t)&priv->bat_desc[RSWITCH_RX_CHAIN_INDEX], + sizeof(struct rswitch_desc)); +} + +static void rswitch_clock_enable(struct rswitch_port_priv *priv) +{ + struct rswitch_etha *etha = &priv->etha; + struct rswitch_gwca *gwca = &priv->gwca; + + setbits_le32(priv->addr + RCEC, BIT(etha->index) | BIT(gwca->index) | RCEC_RCE); +} + +static int rswitch_bpool_init(struct rswitch_port_priv *priv) +{ + u32 pval; + + writel(CABPIRM_BPIOG, priv->addr + CABPIRM); + + return readl_poll_sleep_timeout(priv->addr + CABPIRM, pval, + pval & CABPIRM_BPR, + RSWITCH_SLEEP_US, RSWITCH_TIMEOUT_US); +} + +static void rswitch_mfwd_init(struct rswitch_port_priv *priv) +{ + struct rswitch_etha *etha = &priv->etha; + struct rswitch_gwca *gwca = &priv->gwca; + + writel(FWPC0_DEFAULT, priv->addr + FWPC0(etha->index)); + writel(FWPC0_DEFAULT, priv->addr + FWPC0(gwca->index)); + + writel(RSWITCH_RX_CHAIN_INDEX, + priv->addr + FWPBFCSDC(HW_INDEX_TO_GWCA(gwca->index), etha->index)); + + writel(BIT(gwca->index), + priv->addr + FWPBFC(etha->index)); + + writel(BIT(etha->index), + priv->addr + FWPBFC(gwca->index)); +} + +static void rswitch_rmac_init(struct rswitch_etha *etha) +{ + unsigned char *mac = etha->enetaddr; + + /* Set MAC address */ + writel((mac[2] << 24) | (mac[3] << 16) | (mac[4] << 8) | mac[5], + etha->addr + MRMAC1); + + writel((mac[0] << 8) | mac[1], etha->addr + MRMAC0); + + /* Set MIIx */ + writel(MPIC_PIS_GMII | MPIC_LSC_1000, etha->addr + MPIC); + + writel(0x07E707E7, etha->addr + MRAFC); +} + +static int rswitch_gwca_mcast_table_reset(struct rswitch_gwca *gwca) +{ + u32 pval; + + writel(GWMTIRM_MTIOG, gwca->addr + GWMTIRM); + + return readl_poll_sleep_timeout(gwca->addr + GWMTIRM, pval, + pval & GWMTIRM_MTR, + RSWITCH_SLEEP_US, RSWITCH_TIMEOUT_US); +} + +static int rswitch_gwca_axi_ram_reset(struct rswitch_gwca *gwca) +{ + u32 pval; + + writel(GWARIRM_ARIOG, gwca->addr + GWARIRM); + + return readl_poll_sleep_timeout(gwca->addr + GWARIRM, pval, + pval & GWARIRM_ARR, + RSWITCH_SLEEP_US, RSWITCH_TIMEOUT_US); +} + +static int rswitch_gwca_init(struct rswitch_port_priv *priv) +{ + struct rswitch_gwca *gwca = &priv->gwca; + int ret; + + ret = rswitch_gwca_change_mode(priv, GWMC_OPC_DISABLE); + if (ret) + return ret; + + ret = rswitch_gwca_change_mode(priv, GWMC_OPC_CONFIG); + if (ret) + return ret; + + ret = rswitch_gwca_mcast_table_reset(gwca); + if (ret) + return ret; + + ret = rswitch_gwca_axi_ram_reset(gwca); + if (ret) + return ret; + + /* Setting flow */ + writel(GWVCC_VEM_SC_TAG, gwca->addr + GWVCC); + writel(0, gwca->addr + GWTTFC); + writel(upper_32_bits((uintptr_t)priv->bat_desc) & GWDCBAC0_DCBAUP, gwca->addr + GWDCBAC0); + writel(lower_32_bits((uintptr_t)priv->bat_desc), gwca->addr + GWDCBAC1); + writel(GWDCC_DQT | GWDCC_BALR, gwca->addr + GWDCC(RSWITCH_TX_CHAIN_INDEX)); + writel(GWDCC_BALR, gwca->addr + GWDCC(RSWITCH_RX_CHAIN_INDEX)); + + ret = rswitch_gwca_change_mode(priv, GWMC_OPC_DISABLE); + if (ret) + return ret; + + ret = rswitch_gwca_change_mode(priv, GWMC_OPC_OPERATION); + if (ret) + return ret; + + return 0; +} + +static int rswitch_etha_tas_ram_reset(struct rswitch_etha *etha) +{ + u32 pval; + + writel(EATASRIRM_TASRIOG, etha->addr + EATASRIRM); + + return readl_poll_sleep_timeout(etha->addr + EATASRIRM, pval, + pval & EATASRIRM_TASRR, + RSWITCH_SLEEP_US, RSWITCH_TIMEOUT_US); +} + +static int rswitch_etha_init(struct rswitch_port_priv *priv) +{ + struct rswitch_etha *etha = &priv->etha; + int ret; + u32 prio; + + ret = rswitch_etha_change_mode(priv, EAMC_OPC_DISABLE); + if (ret) + return ret; + + ret = rswitch_etha_change_mode(priv, EAMC_OPC_CONFIG); + if (ret) + return ret; + + ret = rswitch_etha_tas_ram_reset(etha); + if (ret) + return ret; + + /* Setting flow */ + writel(0, etha->addr + EATTFC); + + for (prio = 0; prio < RSWITCH_MAX_CTAG_PCP; prio++) + writel(EATDQDC_DQD, etha->addr + EATDQDC(prio)); + + rswitch_rmac_init(etha); + + ret = rswitch_etha_change_mode(priv, EAMC_OPC_OPERATION); + if (ret) + return ret; + + /* Link Verification */ + ret = rswitch_check_link(etha); + if (ret) + return ret; + + return 0; +} + +static int rswitch_init(struct rswitch_port_priv *priv) +{ + struct rswitch_etha *etha = &priv->etha; + int ret; + + ret = rswitch_reset(priv); + if (ret) + return ret; + + ret = generic_phy_set_mode(&priv->serdes, PHY_MODE_ETHERNET, + etha->phydev->interface); + if (ret) + return ret; + + ret = generic_phy_set_speed(&priv->serdes, etha->phydev->speed); + if (ret) + return ret; + + ret = generic_phy_init(&priv->serdes); + if (ret) + return ret; + + ret = generic_phy_power_on(&priv->serdes); + if (ret) + return ret; + + ret = phy_startup(etha->phydev); + if (ret) + return ret; + + rswitch_bat_desc_init(priv); + rswitch_tx_desc_init(priv); + rswitch_rx_desc_init(priv); + + rswitch_clock_enable(priv); + + ret = rswitch_bpool_init(priv); + if (ret) + return ret; + + rswitch_mfwd_init(priv); + + ret = rswitch_gwca_init(priv); + if (ret) + return ret; + + ret = rswitch_etha_init(priv); + if (ret) + return ret; + + return 0; +} + +static int rswitch_start(struct udevice *dev) +{ + struct rswitch_port_priv *priv = dev_get_priv(dev); + int ret; + + ret = rswitch_init(priv); + if (ret) + return ret; + + return 0; +} + +#define RSWITCH_TX_TIMEOUT_MS 1000 +static int rswitch_send(struct udevice *dev, void *packet, int len) +{ + struct rswitch_port_priv *priv = dev_get_priv(dev); + struct rswitch_desc *desc = &priv->tx_desc[priv->tx_desc_index]; + struct rswitch_gwca *gwca = &priv->gwca; + u32 gwtrc_index, start; + + /* Update TX descriptor */ + rswitch_flush_dcache((uintptr_t)packet, len); + memset(desc, 0x0, sizeof(*desc)); + desc->die_dt = DT_FSINGLE; + desc->info_ds = len; + desc->dptrl = lower_32_bits((uintptr_t)packet); + desc->dptrh = upper_32_bits((uintptr_t)packet); + rswitch_flush_dcache((uintptr_t)desc, sizeof(*desc)); + + /* Start transmission */ + gwtrc_index = RSWITCH_TX_CHAIN_INDEX / 32; + setbits_le32(gwca->addr + GWTRC(gwtrc_index), BIT(RSWITCH_TX_CHAIN_INDEX)); + + /* Wait until packet is transmitted */ + start = get_timer(0); + while (get_timer(start) < RSWITCH_TX_TIMEOUT_MS) { + rswitch_invalidate_dcache((uintptr_t)desc, sizeof(*desc)); + if ((desc->die_dt & DT_MASK) != DT_FSINGLE) + break; + udelay(10); + } + + if (get_timer(start) >= RSWITCH_TX_TIMEOUT_MS) { + dev_dbg(dev, "\n%s: Timeout", __func__); + return -ETIMEDOUT; + } + + priv->tx_desc_index = (priv->tx_desc_index + 1) % (RSWITCH_NUM_TX_DESC - 1); + + return 0; +} + +static int rswitch_recv(struct udevice *dev, int flags, uchar **packetp) +{ + struct rswitch_port_priv *priv = dev_get_priv(dev); + struct rswitch_rxdesc *desc = &priv->rx_desc[priv->rx_desc_index]; + u8 *packet; + int len; + + /* Check if the rx descriptor is ready */ + rswitch_invalidate_dcache((uintptr_t)desc, sizeof(*desc)); + if ((desc->data.die_dt & DT_MASK) == DT_FEMPTY) + return -EAGAIN; + + len = desc->data.info_ds & RX_DS; + packet = (u8 *)(((uintptr_t)(desc->data.dptrh) << 32) | (uintptr_t)desc->data.dptrl); + rswitch_invalidate_dcache((uintptr_t)packet, len); + + *packetp = packet; + + return len; +} + +static int rswitch_free_pkt(struct udevice *dev, uchar *packet, int length) +{ + struct rswitch_port_priv *priv = dev_get_priv(dev); + struct rswitch_rxdesc *desc = &priv->rx_desc[priv->rx_desc_index]; + + /* Make current descritor available again */ + desc->data.die_dt = DT_FEMPTY; + desc->data.info_ds = PKTSIZE_ALIGN; + rswitch_flush_dcache((uintptr_t)desc, sizeof(*desc)); + + /* Point to the next descriptor */ + priv->rx_desc_index = (priv->rx_desc_index + 1) % RSWITCH_NUM_RX_DESC; + desc = &priv->rx_desc[priv->rx_desc_index]; + rswitch_invalidate_dcache((uintptr_t)desc, sizeof(*desc)); + + return 0; +} + +static void rswitch_stop(struct udevice *dev) +{ + struct rswitch_port_priv *priv = dev_get_priv(dev); + + phy_shutdown(priv->etha.phydev); + + generic_phy_power_off(&priv->serdes); +} + +static int rswitch_write_hwaddr(struct udevice *dev) +{ + struct rswitch_port_priv *priv = dev_get_priv(dev); + struct rswitch_etha *etha = &priv->etha; + struct eth_pdata *pdata = dev_get_plat(dev); + unsigned char *mac = pdata->enetaddr; + + writel((mac[2] << 24) | (mac[3] << 16) | (mac[4] << 8) | mac[5], + etha->addr + MRMAC1); + + writel((mac[0] << 8) | mac[1], etha->addr + MRMAC0); + + return 0; +} + +static int rswitch_phy_config(struct udevice *dev) +{ + struct rswitch_port_priv *priv = dev_get_priv(dev); + struct rswitch_etha *etha = &priv->etha; + struct eth_pdata *pdata = dev_get_plat(dev); + struct phy_device *phydev; + int phy_addr; + + phy_addr = eth_phy_get_addr(dev); + if (phy_addr < 0) + return phy_addr; + + phydev = phy_connect(etha->bus, phy_addr, dev, pdata->phy_interface); + if (!phydev) + return -ENODEV; + + etha->phydev = phydev; + phydev->speed = SPEED_1000; + + phy_config(phydev); + + return 0; +} + +static int rswitch_port_probe(struct udevice *dev) +{ + struct rswitch_priv *rpriv = + (struct rswitch_priv *)dev_get_driver_data(dev); + struct eth_pdata *pdata = dev_get_plat(dev); + struct rswitch_port_priv *priv = dev_get_priv(dev); + struct rswitch_etha *etha = &priv->etha; + struct rswitch_gwca *gwca = &priv->gwca; + struct mii_dev *mdiodev; + int ret; + + priv->addr = rpriv->addr; + + etha->enetaddr = pdata->enetaddr; + + etha->index = dev_read_u32_default(dev, "reg", 0); + etha->addr = priv->addr + RSWITCH_ETHA_OFFSET + etha->index * RSWITCH_ETHA_SIZE; + + gwca->index = 1; + gwca->addr = priv->addr + RSWITCH_GWCA_OFFSET + gwca->index * RSWITCH_GWCA_SIZE; + gwca->index = GWCA_TO_HW_INDEX(gwca->index); + + ret = generic_phy_get_by_index(dev, 0, &priv->serdes); + if (ret) + return ret; + + /* Toggle the reset so we can access the PHYs */ + ret = rswitch_reset(priv); + if (ret) + return ret; + + mdiodev = mdio_alloc(); + if (!mdiodev) + return -ENOMEM; + + mdiodev->priv = priv; + mdiodev->read = rswitch_mii_read_c45; + mdiodev->write = rswitch_mii_write_c45; + snprintf(mdiodev->name, sizeof(mdiodev->name), dev->name); + + ret = mdio_register(mdiodev); + if (ret) + goto err_mdio_register; + + priv->etha.bus = miiphy_get_dev_by_name(dev->name); + + ret = rswitch_phy_config(dev); + if (ret) + goto err_mdio_register; + + return 0; + +err_mdio_register: + mdio_free(mdiodev); + return ret; +} + +static int rswitch_port_remove(struct udevice *dev) +{ + struct rswitch_port_priv *priv = dev_get_priv(dev); + + mdio_unregister(priv->etha.bus); + free(priv->etha.phydev); + + return 0; +} + +int rswitch_ofdata_to_platdata(struct udevice *dev) +{ + struct eth_pdata *pdata = dev_get_plat(dev); + + pdata->phy_interface = dev_read_phy_mode(dev); + if (pdata->phy_interface == PHY_INTERFACE_MODE_NA) + return -EINVAL; + + pdata->max_speed = dev_read_u32_default(dev, "max-speed", 1000); + + return 0; +} + +static const struct eth_ops rswitch_port_ops = { + .start = rswitch_start, + .send = rswitch_send, + .recv = rswitch_recv, + .free_pkt = rswitch_free_pkt, + .stop = rswitch_stop, + .write_hwaddr = rswitch_write_hwaddr, +}; + +U_BOOT_DRIVER(rswitch_port) = { + .name = "rswitch-port", + .id = UCLASS_ETH, + .of_to_plat = rswitch_ofdata_to_platdata, + .probe = rswitch_port_probe, + .remove = rswitch_port_remove, + .ops = &rswitch_port_ops, + .priv_auto = sizeof(struct rswitch_port_priv), + .plat_auto = sizeof(struct eth_pdata), + .flags = DM_FLAG_ALLOC_PRIV_DMA | DM_FLAG_OS_PREPARE, +}; + +static int rswitch_probe(struct udevice *dev) +{ + struct rswitch_priv *priv = dev_get_plat(dev); + fdt_addr_t secure_base; + fdt_size_t size; + int ret; + + secure_base = dev_read_addr_size_name(dev, "secure_base", &size); + if (!secure_base) + return -EINVAL; + + priv->addr = map_physmem(secure_base, size, MAP_NOCACHE); + if (!priv->addr) + return -EINVAL; + + priv->rsw_clk = devm_clk_get(dev, NULL); + if (ret) + goto err_map; + + ret = clk_prepare_enable(priv->rsw_clk); + if (ret) + goto err_map; + + return 0; + +err_map: + unmap_physmem(priv->addr, MAP_NOCACHE); + return ret; +} + +static int rswitch_remove(struct udevice *dev) +{ + struct rswitch_priv *priv = dev_get_plat(dev); + + clk_disable_unprepare(priv->rsw_clk); + unmap_physmem(priv->addr, MAP_NOCACHE); + + return 0; +} + +static int rswitch_bind(struct udevice *parent) +{ + struct rswitch_port_priv *priv = dev_get_plat(parent); + ofnode ports_np, node; + struct udevice *dev; + struct driver *drv; + int ret; + + drv = lists_driver_lookup_name("rswitch-port"); + if (!drv) + return -ENOENT; + + ports_np = dev_read_subnode(parent, "ethernet-ports"); + if (!ofnode_valid(ports_np)) + return -ENOENT; + + ofnode_for_each_subnode(node, ports_np) { + ret = device_bind_with_driver_data(parent, drv, + ofnode_get_name(node), + (ulong)priv, node, &dev); + if (ret) + return ret; + } + + return 0; +} + +static const struct udevice_id rswitch_ids[] = { + { .compatible = "renesas,r8a779f0-ether-switch" }, + { } +}; + +U_BOOT_DRIVER(rswitch) = { + .name = "rswitch", + .id = UCLASS_NOP, + .of_match = rswitch_ids, + .bind = rswitch_bind, + .probe = rswitch_probe, + .remove = rswitch_remove, + .plat_auto = sizeof(struct rswitch_priv), +};