--- /dev/null
+// 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),
+};
projects / platform / kernel / u-boot.git / commitdiff