* [PATCH v2 2/2] net: Add fsl_enetc network driver support
2024-01-04 11:22 [PATCH v2 1/2] net/phy: sync phy_interface_t types with Linux Sascha Hauer
@ 2024-01-04 11:22 ` Sascha Hauer
2024-01-04 12:18 ` Sascha Hauer
2024-01-05 9:21 ` [PATCH v2 1/2] net/phy: sync phy_interface_t types with Linux Ahmad Fatoum
1 sibling, 1 reply; 5+ messages in thread
From: Sascha Hauer @ 2024-01-04 11:22 UTC (permalink / raw)
To: Barebox List
This adds support for the fsl_enetc network controller found on several
Layerscape SoCs. The code is originally from U-Boot-2023.10-rc1.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
Notes:
Changes since v1:
- Use get_unaligned to access unaligned pointers
- use physical address returned by dma_alloc_coherent()
- implement struct pci_driver::remove hook
- do not printf in poller function
- use write[lwq] to access rx/tx rings to avoid dmb()
drivers/net/Kconfig | 9 +
drivers/net/Makefile | 1 +
drivers/net/fsl_enetc.c | 603 +++++++++++++++++++++++++++++++++++
drivers/net/fsl_enetc.h | 252 +++++++++++++++
drivers/net/fsl_enetc_mdio.c | 127 ++++++++
5 files changed, 992 insertions(+)
create mode 100644 drivers/net/fsl_enetc.c
create mode 100644 drivers/net/fsl_enetc.h
create mode 100644 drivers/net/fsl_enetc_mdio.c
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index e3571cbb20..430cc6a4e7 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -188,6 +188,15 @@ config DRIVER_NET_FEC_IMX
depends on HAS_DMA
select PHYLIB
+config DRIVER_NET_FSL_ENETC
+ bool "Freescale enetc ethernet driver"
+ select PHYLIB
+ depends on PCI
+ depends on HAS_DMA
+ help
+ This option enables support for the Freescale enetc core found
+ on Layerscape SoCs.
+
config DRIVER_NET_FSL_FMAN
bool "Freescale fman ethernet driver"
select PHYLIB
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index 61dcf60cba..207345cfa3 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -25,6 +25,7 @@ obj-$(CONFIG_DRIVER_NET_ENC28J60) += enc28j60.o
obj-$(CONFIG_DRIVER_NET_EP93XX) += ep93xx.o
obj-$(CONFIG_DRIVER_NET_ETHOC) += ethoc.o
obj-$(CONFIG_DRIVER_NET_FEC_IMX) += fec_imx.o
+obj-$(CONFIG_DRIVER_NET_FSL_ENETC) += fsl_enetc.o fsl_enetc_mdio.o
obj-$(CONFIG_DRIVER_NET_FSL_FMAN) += fsl-fman.o
obj-$(CONFIG_DRIVER_NET_GIANFAR) += gianfar.o
obj-$(CONFIG_DRIVER_NET_KS8851_MLL) += ks8851_mll.o
diff --git a/drivers/net/fsl_enetc.c b/drivers/net/fsl_enetc.c
new file mode 100644
index 0000000000..eb90c526bb
--- /dev/null
+++ b/drivers/net/fsl_enetc.c
@@ -0,0 +1,603 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * ENETC ethernet controller driver
+ * Copyright 2017-2021 NXP
+ */
+#include <common.h>
+#include <dma.h>
+#include <net.h>
+#include <linux/phy.h>
+#include <linux/pci.h>
+#include <io.h>
+#include <linux/mdio.h>
+#include <asm/system.h>
+#include <of_net.h>
+#include <asm/unaligned.h>
+
+#include "fsl_enetc.h"
+
+/* MDIO wrappers, we're using these to drive internal MDIO to get to serdes */
+static __maybe_unused int enetc_mdio_read(struct enetc_priv *priv, int addr, int devad, int reg)
+{
+ struct enetc_mdio_priv mdio_priv;
+
+ mdio_priv.regs_base = priv->port_regs + ENETC_PM_IMDIO_BASE;
+
+ return enetc_mdio_read_priv(&mdio_priv, addr, devad, reg);
+}
+
+static int enetc_mdio_write(struct enetc_priv *priv, int addr, int devad, int reg,
+ u16 val)
+{
+ struct enetc_mdio_priv mdio_priv;
+ int ret;
+
+ mdio_priv.regs_base = priv->port_regs + ENETC_PM_IMDIO_BASE;
+
+ ret = enetc_mdio_write_priv(&mdio_priv, addr, devad, reg, val);
+
+ return ret;
+}
+
+/* only interfaces that can pin out through serdes have internal MDIO */
+static bool enetc_has_imdio(struct eth_device *edev)
+{
+ struct enetc_priv *priv = edev->priv;
+
+ return !!(enetc_read_port(priv, ENETC_PCAPR0) & ENETC_PCAPRO_MDIO);
+}
+
+/* set up serdes for SGMII */
+static int enetc_init_sgmii(struct eth_device *edev)
+{
+ struct enetc_priv *priv = edev->priv;
+ bool is2500 = false;
+ u16 reg;
+
+ if (!enetc_has_imdio(edev))
+ return 0;
+
+ if (priv->uclass_id == PHY_INTERFACE_MODE_2500BASEX)
+ is2500 = true;
+
+ /*
+ * Set to SGMII mode, for 1Gbps enable AN, for 2.5Gbps set fixed speed.
+ * Although fixed speed is 1Gbps, we could be running at 2.5Gbps based
+ * on PLL configuration. Setting 1G for 2.5G here is counter intuitive
+ * but intentional.
+ */
+ reg = ENETC_PCS_IF_MODE_SGMII;
+ reg |= is2500 ? ENETC_PCS_IF_MODE_SPEED_1G : ENETC_PCS_IF_MODE_SGMII_AN;
+ enetc_mdio_write(priv, ENETC_PCS_PHY_ADDR, MDIO_DEVAD_NONE,
+ ENETC_PCS_IF_MODE, reg);
+
+ /* Dev ability - SGMII */
+ enetc_mdio_write(priv, ENETC_PCS_PHY_ADDR, MDIO_DEVAD_NONE,
+ ENETC_PCS_DEV_ABILITY, ENETC_PCS_DEV_ABILITY_SGMII);
+
+ /* Adjust link timer for SGMII */
+ enetc_mdio_write(priv, ENETC_PCS_PHY_ADDR, MDIO_DEVAD_NONE,
+ ENETC_PCS_LINK_TIMER1, ENETC_PCS_LINK_TIMER1_VAL);
+ enetc_mdio_write(priv, ENETC_PCS_PHY_ADDR, MDIO_DEVAD_NONE,
+ ENETC_PCS_LINK_TIMER2, ENETC_PCS_LINK_TIMER2_VAL);
+
+ reg = ENETC_PCS_CR_DEF_VAL;
+ reg |= is2500 ? ENETC_PCS_CR_RST : ENETC_PCS_CR_RESET_AN;
+ /* restart PCS AN */
+ enetc_mdio_write(priv, ENETC_PCS_PHY_ADDR, MDIO_DEVAD_NONE,
+ ENETC_PCS_CR, reg);
+
+ return 0;
+}
+
+/* set up MAC for RGMII */
+static void enetc_init_rgmii(struct eth_device *edev, struct phy_device *phydev)
+{
+ struct enetc_priv *priv = edev->priv;
+ u32 old_val, val;
+
+ old_val = val = enetc_read_port(priv, ENETC_PM_IF_MODE);
+
+ /* disable unreliable RGMII in-band signaling and force the MAC into
+ * the speed negotiated by the PHY.
+ */
+ val &= ~ENETC_PM_IF_MODE_AN_ENA;
+
+ if (phydev->speed == SPEED_1000) {
+ val &= ~ENETC_PM_IFM_SSP_MASK;
+ val |= ENETC_PM_IFM_SSP_1000;
+ } else if (phydev->speed == SPEED_100) {
+ val &= ~ENETC_PM_IFM_SSP_MASK;
+ val |= ENETC_PM_IFM_SSP_100;
+ } else if (phydev->speed == SPEED_10) {
+ val &= ~ENETC_PM_IFM_SSP_MASK;
+ val |= ENETC_PM_IFM_SSP_10;
+ }
+
+ if (phydev->duplex == DUPLEX_FULL)
+ val |= ENETC_PM_IFM_FULL_DPX;
+ else
+ val &= ~ENETC_PM_IFM_FULL_DPX;
+
+ if (val == old_val)
+ return;
+
+ enetc_write_port(priv, ENETC_PM_IF_MODE, val);
+}
+
+/* set up MAC configuration for the given interface type */
+static void enetc_setup_mac_iface(struct eth_device *edev,
+ struct phy_device *phydev)
+{
+ struct enetc_priv *priv = edev->priv;
+ u32 if_mode;
+
+ switch (priv->uclass_id) {
+ case PHY_INTERFACE_MODE_RGMII:
+ case PHY_INTERFACE_MODE_RGMII_ID:
+ case PHY_INTERFACE_MODE_RGMII_RXID:
+ case PHY_INTERFACE_MODE_RGMII_TXID:
+ enetc_init_rgmii(edev, phydev);
+ break;
+ case PHY_INTERFACE_MODE_USXGMII:
+ case PHY_INTERFACE_MODE_10GBASER:
+ /* set ifmode to (US)XGMII */
+ if_mode = enetc_read_port(priv, ENETC_PM_IF_MODE);
+ if_mode &= ~ENETC_PM_IF_IFMODE_MASK;
+ enetc_write_port(priv, ENETC_PM_IF_MODE, if_mode);
+ break;
+ };
+}
+
+/* set up serdes for SXGMII */
+static int enetc_init_sxgmii(struct eth_device *edev)
+{
+ struct enetc_priv *priv = edev->priv;
+
+ if (!enetc_has_imdio(edev))
+ return 0;
+
+ /* Dev ability - SXGMII */
+ enetc_mdio_write(priv, ENETC_PCS_PHY_ADDR, ENETC_PCS_DEVAD_REPL,
+ ENETC_PCS_DEV_ABILITY, ENETC_PCS_DEV_ABILITY_SXGMII);
+
+ /* Restart PCS AN */
+ enetc_mdio_write(priv, ENETC_PCS_PHY_ADDR, ENETC_PCS_DEVAD_REPL,
+ ENETC_PCS_CR,
+ ENETC_PCS_CR_RST | ENETC_PCS_CR_RESET_AN);
+
+ return 0;
+}
+
+/* Apply protocol specific configuration to MAC, serdes as needed */
+static void enetc_start_pcs(struct eth_device *edev)
+{
+ struct enetc_priv *priv = edev->priv;
+
+ priv->uclass_id = of_get_phy_mode(priv->dev->of_node);
+ if (priv->uclass_id == PHY_INTERFACE_MODE_NA) {
+ dev_dbg(&edev->dev,
+ "phy-mode property not found, defaulting to SGMII\n");
+ priv->uclass_id = PHY_INTERFACE_MODE_SGMII;
+ }
+
+ switch (priv->uclass_id) {
+ case PHY_INTERFACE_MODE_SGMII:
+ case PHY_INTERFACE_MODE_2500BASEX:
+ enetc_init_sgmii(edev);
+ break;
+ case PHY_INTERFACE_MODE_USXGMII:
+ case PHY_INTERFACE_MODE_10GBASER:
+ enetc_init_sxgmii(edev);
+ break;
+ };
+}
+
+/*
+ * LS1028A is the only part with IERB at this time and there are plans to
+ * change its structure, keep this LS1028A specific for now.
+ */
+#define LS1028A_IERB_BASE 0x1f0800000ULL
+#define LS1028A_IERB_PSIPMAR0(pf, vf) (LS1028A_IERB_BASE + 0x8000 \
+ + (pf) * 0x100 + (vf) * 8)
+#define LS1028A_IERB_PSIPMAR1(pf, vf) (LS1028A_IERB_PSIPMAR0(pf, vf) + 4)
+
+static int enetc_get_hwaddr(struct eth_device *edev, unsigned char *mac)
+{
+ return -EOPNOTSUPP;
+}
+
+static int enetc_ls1028a_write_hwaddr(struct eth_device *edev, const unsigned char *mac)
+{
+ struct enetc_priv *priv = edev->priv;
+ struct pci_dev *pdev = to_pci_dev(priv->dev);
+ const int devfn_to_pf[] = {0, 1, 2, -1, -1, -1, 3};
+ int devfn = PCI_FUNC(pdev->devfn);
+ u32 lower, upper;
+ int pf;
+
+ if (devfn >= ARRAY_SIZE(devfn_to_pf))
+ return 0;
+
+ pf = devfn_to_pf[devfn];
+ if (pf < 0)
+ return 0;
+
+ lower = get_unaligned_le16(mac + 4);
+ upper = get_unaligned_le32(mac);
+
+ out_le32(LS1028A_IERB_PSIPMAR0(pf, 0), upper);
+ out_le32(LS1028A_IERB_PSIPMAR1(pf, 0), lower);
+
+ return 0;
+}
+
+static int enetc_write_hwaddr(struct eth_device *edev, const unsigned char *mac)
+{
+ struct enetc_priv *priv = edev->priv;
+
+ u16 lower = get_unaligned_le16(mac + 4);
+ u32 upper = get_unaligned_le32(mac);
+
+ enetc_write_port(priv, ENETC_PSIPMAR0, upper);
+ enetc_write_port(priv, ENETC_PSIPMAR1, lower);
+
+ return 0;
+}
+
+/* Configure port parameters (# of rings, frame size, enable port) */
+static void enetc_enable_si_port(struct enetc_priv *priv)
+{
+ u32 val;
+
+ /* set Rx/Tx BDR count */
+ val = ENETC_PSICFGR_SET_TXBDR(ENETC_TX_BDR_CNT);
+ val |= ENETC_PSICFGR_SET_RXBDR(ENETC_RX_BDR_CNT);
+ enetc_write_port(priv, ENETC_PSICFGR(0), val);
+ /* set Rx max frame size */
+ enetc_write_port(priv, ENETC_PM_MAXFRM, ENETC_RX_MAXFRM_SIZE);
+ /* enable MAC port */
+ enetc_write_port(priv, ENETC_PM_CC, ENETC_PM_CC_RX_TX_EN);
+ /* enable port */
+ enetc_write_port(priv, ENETC_PMR, ENETC_PMR_SI0_EN);
+ /* set SI cache policy */
+ enetc_write(priv, ENETC_SICAR0,
+ ENETC_SICAR_RD_CFG | ENETC_SICAR_WR_CFG);
+ /* enable SI */
+ enetc_write(priv, ENETC_SIMR, ENETC_SIMR_EN);
+}
+
+/* returns DMA address for a given buffer index */
+static inline dma_addr_t enetc_rxb_address(struct enetc_priv *priv, int i)
+{
+ return priv->rx_pkg_phys[i];
+}
+
+/*
+ * Setup a single Tx BD Ring (ID = 0):
+ * - set Tx buffer descriptor address
+ * - set the BD count
+ * - initialize the producer and consumer index
+ */
+static void enetc_setup_tx_bdr(struct eth_device *edev)
+{
+ struct enetc_priv *priv = edev->priv;
+ struct bd_ring *tx_bdr = &priv->tx_bdr;
+ u64 tx_bd_add = (u64)priv->enetc_txbd_phys;
+
+ /* used later to advance to the next Tx BD */
+ tx_bdr->bd_count = ENETC_BD_CNT;
+ tx_bdr->next_prod_idx = 0;
+ tx_bdr->next_cons_idx = 0;
+ tx_bdr->cons_idx = priv->regs_base +
+ ENETC_BDR(TX, ENETC_TX_BDR_ID, ENETC_TBCIR);
+ tx_bdr->prod_idx = priv->regs_base +
+ ENETC_BDR(TX, ENETC_TX_BDR_ID, ENETC_TBPIR);
+
+ /* set Tx BD address */
+ enetc_bdr_write(priv, TX, ENETC_TX_BDR_ID, ENETC_TBBAR0,
+ lower_32_bits(tx_bd_add));
+ enetc_bdr_write(priv, TX, ENETC_TX_BDR_ID, ENETC_TBBAR1,
+ upper_32_bits(tx_bd_add));
+ /* set Tx 8 BD count */
+ enetc_bdr_write(priv, TX, ENETC_TX_BDR_ID, ENETC_TBLENR,
+ tx_bdr->bd_count);
+
+ /* reset both producer/consumer indexes */
+ enetc_write_reg(tx_bdr->cons_idx, tx_bdr->next_cons_idx);
+ enetc_write_reg(tx_bdr->prod_idx, tx_bdr->next_prod_idx);
+
+ /* enable TX ring */
+ enetc_bdr_write(priv, TX, ENETC_TX_BDR_ID, ENETC_TBMR, ENETC_TBMR_EN);
+}
+
+/*
+ * Setup a single Rx BD Ring (ID = 0):
+ * - set Rx buffer descriptors address (one descriptor per buffer)
+ * - set buffer size as max frame size
+ * - enable Rx ring
+ * - reset consumer and producer indexes
+ * - set buffer for each descriptor
+ */
+static void enetc_setup_rx_bdr(struct eth_device *edev)
+{
+ struct enetc_priv *priv = edev->priv;
+ struct bd_ring *rx_bdr = &priv->rx_bdr;
+ u64 rx_bd_add = (u64)priv->enetc_rxbd_phys;
+ int i;
+
+ /* used later to advance to the next BD produced by ENETC HW */
+ rx_bdr->bd_count = ENETC_BD_CNT;
+ rx_bdr->next_prod_idx = 0;
+ rx_bdr->next_cons_idx = 0;
+ rx_bdr->cons_idx = priv->regs_base +
+ ENETC_BDR(RX, ENETC_RX_BDR_ID, ENETC_RBCIR);
+ rx_bdr->prod_idx = priv->regs_base +
+ ENETC_BDR(RX, ENETC_RX_BDR_ID, ENETC_RBPIR);
+
+ /* set Rx BD address */
+ enetc_bdr_write(priv, RX, ENETC_RX_BDR_ID, ENETC_RBBAR0,
+ lower_32_bits(rx_bd_add));
+ enetc_bdr_write(priv, RX, ENETC_RX_BDR_ID, ENETC_RBBAR1,
+ upper_32_bits(rx_bd_add));
+ /* set Rx BD count (multiple of 8) */
+ enetc_bdr_write(priv, RX, ENETC_RX_BDR_ID, ENETC_RBLENR,
+ rx_bdr->bd_count);
+ /* set Rx buffer size */
+ enetc_bdr_write(priv, RX, ENETC_RX_BDR_ID, ENETC_RBBSR, PKTSIZE);
+
+ /* fill Rx BD */
+ memset(priv->enetc_rxbd, 0,
+ rx_bdr->bd_count * sizeof(union enetc_rx_bd));
+
+ for (i = 0; i < rx_bdr->bd_count; i++) {
+ priv->rx_pkg[i] = dma_alloc(PKTSIZE);
+ priv->rx_pkg_phys[i] = dma_map_single(priv->dev, priv->rx_pkg[i],
+ PKTSIZE, DMA_FROM_DEVICE);
+ priv->enetc_rxbd[i].w.addr = priv->rx_pkg_phys[i];
+ }
+
+ /* reset producer (ENETC owned) and consumer (SW owned) index */
+ enetc_write_reg(rx_bdr->cons_idx, rx_bdr->next_cons_idx);
+ enetc_write_reg(rx_bdr->prod_idx, rx_bdr->next_prod_idx);
+
+ /* enable Rx ring */
+ enetc_bdr_write(priv, RX, ENETC_RX_BDR_ID, ENETC_RBMR, ENETC_RBMR_EN);
+}
+
+/*
+ * Start ENETC interface:
+ * - perform FLR
+ * - enable access to port and SI registers
+ * - set mac address
+ * - setup TX/RX buffer descriptors
+ * - enable Tx/Rx rings
+ */
+static int enetc_start(struct eth_device *edev)
+{
+ struct enetc_priv *priv = edev->priv;
+ struct pci_dev *pdev = to_pci_dev(priv->dev);
+ u32 t;
+ int ret, interface;
+
+ /* reset and enable the PCI device */
+ pci_flr(pdev);
+
+ pci_read_config_dword(pdev, PCI_COMMAND, &t);
+ pci_write_config_dword(pdev, PCI_COMMAND, t | PCI_COMMAND_MASTER | PCI_COMMAND_MEMORY);
+
+ interface = of_get_phy_mode(priv->dev->of_node);
+
+ ret = phy_device_connect(edev, NULL, 0, NULL, 0, interface);
+ if (ret)
+ return ret;
+
+ enetc_enable_si_port(priv);
+
+ /* setup Tx/Rx buffer descriptors */
+ enetc_setup_tx_bdr(edev);
+ enetc_setup_rx_bdr(edev);
+
+ enetc_setup_mac_iface(edev, priv->phy);
+
+ return 0;
+}
+
+/*
+ * Stop the network interface:
+ * - just quiesce it, we can wipe all configuration as _start starts from
+ * scratch each time
+ */
+static void enetc_stop(struct eth_device *edev)
+{
+ struct enetc_priv *priv = edev->priv;
+ struct pci_dev *pdev = to_pci_dev(priv->dev);
+ u32 t;
+
+ /* FLR is sufficient to quiesce the device */
+ pci_flr(pdev);
+
+ /* leave the BARs accessible after we stop, this is needed to use
+ * internal MDIO in command line.
+ */
+ pci_read_config_dword(pdev, PCI_COMMAND, &t);
+ pci_write_config_dword(pdev, PCI_COMMAND, t | PCI_COMMAND_MEMORY);
+}
+
+/*
+ * ENETC transmit packet:
+ * - check if Tx BD ring is full
+ * - set buffer/packet address (dma address)
+ * - set final fragment flag
+ * - try while producer index equals consumer index or timeout
+ */
+static int enetc_send(struct eth_device *edev, void *packet, int length)
+{
+ struct enetc_priv *priv = edev->priv;
+ struct bd_ring *txr = &priv->tx_bdr;
+ int ret;
+ u32 pi, ci;
+ dma_addr_t dma;
+ u64 start;
+
+ pi = txr->next_prod_idx;
+ ci = enetc_read_reg(txr->cons_idx) & ENETC_BDR_IDX_MASK;
+ /* Tx ring is full when */
+ if (((pi + 1) % txr->bd_count) == ci) {
+ dev_err(&edev->dev, "Tx BDR full\n");
+ return -ETIMEDOUT;
+ }
+
+ dev_vdbg(&edev->dev, "TxBD[%d]send: pkt_len=%d, buff @0x%x%08x\n", pi, length,
+ upper_32_bits((u64)packet), lower_32_bits((u64)packet));
+
+ dma = dma_map_single(priv->dev, packet, length, DMA_TO_DEVICE);
+
+ /* prepare Tx BD */
+ memset(&priv->enetc_txbd[pi], 0x0, sizeof(struct enetc_tx_bd));
+ priv->enetc_txbd[pi].addr = cpu_to_le64(dma);
+ priv->enetc_txbd[pi].buf_len = cpu_to_le16(length);
+ priv->enetc_txbd[pi].frm_len = cpu_to_le16(length);
+ priv->enetc_txbd[pi].flags = cpu_to_le16(ENETC_TXBD_FLAGS_F);
+
+ dmb();
+
+ /* send frame: increment producer index */
+ pi = (pi + 1) % txr->bd_count;
+ txr->next_prod_idx = pi;
+ enetc_write_reg(txr->prod_idx, pi);
+
+ start = get_time_ns();
+
+ while (1) {
+ if (is_timeout(start, 100 * USECOND)) {
+ ret = -ETIMEDOUT;
+ break;
+ }
+
+ if (pi == (enetc_read_reg(txr->cons_idx) & ENETC_BDR_IDX_MASK)) {
+ ret = 0;
+ break;
+ }
+ }
+
+ dma_unmap_single(priv->dev, dma, length, DMA_TO_DEVICE);
+
+ return ret;
+}
+
+/*
+ * Receive frame:
+ * - wait for the next BD to get ready bit set
+ * - clean up the descriptor
+ * - move on and indicate to HW that the cleaned BD is available for Rx
+ */
+static int enetc_recv(struct eth_device *edev)
+{
+ struct enetc_priv *priv = edev->priv;
+ struct bd_ring *rxr = &priv->rx_bdr;
+ int pi = rxr->next_prod_idx;
+ int ci = rxr->next_cons_idx;
+ u32 status;
+ void *pkg;
+ int len;
+
+ status = le32_to_cpu(priv->enetc_rxbd[pi].r.lstatus);
+
+ /* check if current BD is ready to be consumed */
+ if (!ENETC_RXBD_STATUS_R(status))
+ return 0;
+
+ dmb();
+
+ len = le16_to_cpu(priv->enetc_rxbd[pi].r.buf_len);
+
+ dev_dbg(&edev->dev, "RxBD[%d]: len=%d err=%d pkt=0x%p\n", pi, len,
+ ENETC_RXBD_STATUS_ERRORS(status), pkg);
+
+ dma_sync_single_for_cpu(priv->dev, priv->rx_pkg_phys[pi], PKTSIZE, DMA_FROM_DEVICE);
+ net_receive(edev, priv->rx_pkg[pi], len);
+ dma_sync_single_for_device(priv->dev, priv->rx_pkg_phys[pi], PKTSIZE, DMA_FROM_DEVICE);
+
+ /* BD clean up and advance to next in ring */
+ memset(&priv->enetc_rxbd[pi], 0, sizeof(union enetc_rx_bd));
+ priv->enetc_rxbd[pi].w.addr = priv->rx_pkg_phys[pi];
+ rxr->next_prod_idx = (pi + 1) % rxr->bd_count;
+ ci = (ci + 1) % rxr->bd_count;
+ rxr->next_cons_idx = ci;
+ dmb();
+ /* free up the slot in the ring for HW */
+ enetc_write_reg(rxr->cons_idx, ci);
+
+ return 0;
+}
+
+static int enetc_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ struct device *dev = &pdev->dev;
+ struct enetc_priv *priv;
+ struct eth_device *edev;
+
+ pci_enable_device(pdev);
+ pci_set_master(pdev);
+
+ priv = xzalloc(sizeof(*priv));
+ priv->dev = dev;
+
+ priv->enetc_txbd = dma_alloc_coherent(sizeof(struct enetc_tx_bd) * ENETC_BD_CNT,
+ &priv->enetc_txbd_phys);
+ priv->enetc_rxbd = dma_alloc_coherent(sizeof(union enetc_rx_bd) * ENETC_BD_CNT,
+ &priv->enetc_rxbd_phys);
+
+ if (!priv->enetc_txbd || !priv->enetc_rxbd)
+ return -ENOMEM;
+
+ /* initialize register */
+ priv->regs_base = pci_iomap(pdev, 0);
+ if (!priv->regs_base) {
+ dev_err(dev, "failed to map BAR0\n");
+ return -EINVAL;
+ }
+
+ edev = &priv->edev;
+ dev->priv = priv;
+ edev->priv = priv;
+ edev->open = enetc_start;
+ edev->send = enetc_send;
+ edev->recv = enetc_recv;
+ edev->halt = enetc_stop;
+ edev->get_ethaddr = enetc_get_hwaddr;
+
+ if (of_machine_is_compatible("fsl,ls1028a"))
+ edev->set_ethaddr = enetc_ls1028a_write_hwaddr;
+ else
+ edev->set_ethaddr = enetc_write_hwaddr;
+
+ edev->parent = dev;
+
+ priv->port_regs = priv->regs_base + ENETC_PORT_REGS_OFF;
+
+ enetc_start_pcs(&priv->edev);
+
+ return eth_register(edev);
+}
+
+static void enetc_remove(struct pci_dev *pdev)
+{
+ struct enetc_priv *priv = pdev->dev.priv;
+
+ enetc_stop(&priv->edev);
+}
+
+static DEFINE_PCI_DEVICE_TABLE(enetc_pci_tbl) = {
+ { PCI_DEVICE(PCI_VENDOR_ID_FREESCALE, PCI_DEVICE_ID_ENETC_ETH) },
+ { },
+};
+
+static struct pci_driver enetc_eth_driver = {
+ .name = "fsl_enetc",
+ .id_table = enetc_pci_tbl,
+ .probe = enetc_probe,
+ .remove = enetc_remove,
+};
+device_pci_driver(enetc_eth_driver);
diff --git a/drivers/net/fsl_enetc.h b/drivers/net/fsl_enetc.h
new file mode 100644
index 0000000000..dc59325ae7
--- /dev/null
+++ b/drivers/net/fsl_enetc.h
@@ -0,0 +1,252 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * ENETC ethernet controller driver
+ * Copyright 2017-2021 NXP
+ */
+
+#ifndef _ENETC_H
+#define _ENETC_H
+
+#include <linux/bitops.h>
+
+/* PCI function IDs */
+#define PCI_DEVICE_ID_ENETC_ETH 0xE100
+#define PCI_DEVICE_ID_ENETC_MDIO 0xEE01
+
+/* ENETC Ethernet controller registers */
+/* Station interface register offsets */
+#define ENETC_SIMR 0x000
+#define ENETC_SIMR_EN BIT(31)
+#define ENETC_SICAR0 0x040
+/* write cache cfg: snoop, no allocate, data & BD coherent */
+#define ENETC_SICAR_WR_CFG 0x6767
+/* read cache cfg: coherent copy, look up, don't alloc in cache */
+#define ENETC_SICAR_RD_CFG 0x27270000
+#define ENETC_SIROCT 0x300
+#define ENETC_SIRFRM 0x308
+#define ENETC_SITOCT 0x320
+#define ENETC_SITFRM 0x328
+
+/* Rx/Tx Buffer Descriptor Ring registers */
+enum enetc_bdr_type {TX, RX};
+#define ENETC_BDR(type, n, off) (0x8000 + (type) * 0x100 + (n) * 0x200 + (off))
+#define ENETC_BDR_IDX_MASK 0xffff
+
+/* Rx BDR reg offsets */
+#define ENETC_RBMR 0x00
+#define ENETC_RBMR_EN BIT(31)
+#define ENETC_RBBSR 0x08
+/* initial consumer index for Rx BDR */
+#define ENETC_RBCIR 0x0c
+#define ENETC_RBBAR0 0x10
+#define ENETC_RBBAR1 0x14
+#define ENETC_RBPIR 0x18
+#define ENETC_RBLENR 0x20
+
+/* Tx BDR reg offsets */
+#define ENETC_TBMR 0x00
+#define ENETC_TBMR_EN BIT(31)
+#define ENETC_TBBAR0 0x10
+#define ENETC_TBBAR1 0x14
+#define ENETC_TBPIR 0x18
+#define ENETC_TBCIR 0x1c
+#define ENETC_TBLENR 0x20
+
+/* Port registers offset */
+#define ENETC_PORT_REGS_OFF 0x10000
+
+/* Port registers */
+#define ENETC_PMR 0x0000
+#define ENETC_PMR_SI0_EN BIT(16)
+#define ENETC_PSIPMMR 0x0018
+#define ENETC_PSIPMAR0 0x0100
+#define ENETC_PSIPMAR1 0x0104
+#define ENETC_PCAPR0 0x0900
+#define ENETC_PCAPRO_MDIO BIT(11)
+#define ENETC_PSICFGR(n) (0x0940 + (n) * 0x10)
+#define ENETC_PSICFGR_SET_TXBDR(val) ((val) & 0xff)
+#define ENETC_PSICFGR_SET_RXBDR(val) (((val) & 0xff) << 16)
+/* MAC configuration */
+#define ENETC_PM_CC 0x8008
+#define ENETC_PM_CC_DEFAULT 0x0810
+#define ENETC_PM_CC_RX_TX_EN 0x8813
+#define ENETC_PM_MAXFRM 0x8014
+#define ENETC_RX_MAXFRM_SIZE PKTSIZE
+#define ENETC_PM_IMDIO_BASE 0x8030
+#define ENETC_PM_IF_MODE 0x8300
+#define ENETC_PM_IF_MODE_RG BIT(2)
+#define ENETC_PM_IF_MODE_AN_ENA BIT(15)
+#define ENETC_PM_IFM_SSP_MASK GENMASK(14, 13)
+#define ENETC_PM_IFM_SSP_1000 (2 << 13)
+#define ENETC_PM_IFM_SSP_100 (0 << 13)
+#define ENETC_PM_IFM_SSP_10 (1 << 13)
+#define ENETC_PM_IFM_FULL_DPX BIT(12)
+#define ENETC_PM_IF_IFMODE_MASK GENMASK(1, 0)
+
+/* buffer descriptors count must be multiple of 8 and aligned to 128 bytes */
+#define ENETC_BD_CNT 128
+#define ENETC_BD_ALIGN 128
+
+/* single pair of Rx/Tx rings */
+#define ENETC_RX_BDR_CNT 1
+#define ENETC_TX_BDR_CNT 1
+#define ENETC_RX_BDR_ID 0
+#define ENETC_TX_BDR_ID 0
+
+/* Tx buffer descriptor */
+struct enetc_tx_bd {
+ __le64 addr;
+ __le16 buf_len;
+ __le16 frm_len;
+ __le16 err_csum;
+ __le16 flags;
+} __packed;
+
+#define ENETC_TXBD_FLAGS_F BIT(15)
+#define ENETC_POLL_TRIES 32000
+
+/* Rx buffer descriptor */
+union enetc_rx_bd {
+ /* SW provided BD format */
+ struct {
+ __le64 addr;
+ u8 reserved[8];
+ } w;
+
+ /* ENETC returned BD format */
+ struct {
+ __le16 inet_csum;
+ __le16 parse_summary;
+ __le32 rss_hash;
+ __le16 buf_len;
+ __le16 vlan_opt;
+ union {
+ struct {
+ __le16 flags;
+ __le16 error;
+ } __packed;
+ __le32 lstatus;
+ };
+ } r;
+} __packed;
+
+#define ENETC_RXBD_STATUS_R(status) (((status) >> 30) & 0x1)
+#define ENETC_RXBD_STATUS_F(status) (((status) >> 31) & 0x1)
+#define ENETC_RXBD_STATUS_ERRORS(status) (((status) >> 16) & 0xff)
+#define ENETC_RXBD_STATUS(flags) ((flags) << 16)
+
+/* Tx/Rx ring info */
+struct bd_ring {
+ void *cons_idx;
+ void *prod_idx;
+ /* next BD index to use */
+ int next_prod_idx;
+ int next_cons_idx;
+ int bd_count;
+};
+
+/* ENETC private structure */
+struct enetc_priv {
+ struct eth_device edev;
+ struct device *dev;
+
+ struct enetc_tx_bd *enetc_txbd;
+ union enetc_rx_bd *enetc_rxbd;
+
+ dma_addr_t rx_pkg_phys[ENETC_BD_CNT];
+ dma_addr_t enetc_txbd_phys;
+ dma_addr_t enetc_rxbd_phys;
+
+ void *rx_pkg[ENETC_BD_CNT];
+
+ void __iomem *regs_base; /* base ENETC registers */
+ void __iomem *port_regs; /* base ENETC port registers */
+
+ /* Rx/Tx buffer descriptor rings info */
+ struct bd_ring tx_bdr;
+ struct bd_ring rx_bdr;
+
+ int uclass_id;
+ struct phy_device *phy;
+};
+
+/* register accessors */
+#define enetc_read_reg(x) readl((x))
+#define enetc_write_reg(x, val) writel((val), (x))
+#define enetc_read(priv, off) enetc_read_reg((priv)->regs_base + (off))
+#define enetc_write(priv, off, v) \
+ enetc_write_reg((priv)->regs_base + (off), v)
+
+/* port register accessors */
+#define enetc_port_regs(priv, off) ((priv)->port_regs + (off))
+#define enetc_read_port(priv, off) \
+ enetc_read_reg(enetc_port_regs((priv), (off)))
+#define enetc_write_port(priv, off, v) \
+ enetc_write_reg(enetc_port_regs((priv), (off)), v)
+
+/* BDR register accessors, see ENETC_BDR() */
+#define enetc_bdr_read(priv, t, n, off) \
+ enetc_read(priv, ENETC_BDR(t, n, off))
+#define enetc_bdr_write(priv, t, n, off, val) \
+ enetc_write(priv, ENETC_BDR(t, n, off), val)
+
+/* PCS / internal SoC PHY ID, it defaults to 0 on all interfaces */
+#define ENETC_PCS_PHY_ADDR 0
+
+/* PCS registers */
+#define ENETC_PCS_CR 0x00
+#define ENETC_PCS_CR_RESET_AN 0x1200
+#define ENETC_PCS_CR_DEF_VAL 0x0140
+#define ENETC_PCS_CR_RST BIT(15)
+#define ENETC_PCS_DEV_ABILITY 0x04
+#define ENETC_PCS_DEV_ABILITY_SGMII 0x4001
+#define ENETC_PCS_DEV_ABILITY_SXGMII 0x5001
+#define ENETC_PCS_LINK_TIMER1 0x12
+#define ENETC_PCS_LINK_TIMER1_VAL 0x06a0
+#define ENETC_PCS_LINK_TIMER2 0x13
+#define ENETC_PCS_LINK_TIMER2_VAL 0x0003
+#define ENETC_PCS_IF_MODE 0x14
+#define ENETC_PCS_IF_MODE_SGMII BIT(0)
+#define ENETC_PCS_IF_MODE_SGMII_AN BIT(1)
+#define ENETC_PCS_IF_MODE_SPEED_1G BIT(3)
+
+/* PCS replicator block for USXGMII */
+#define ENETC_PCS_DEVAD_REPL 0x1f
+
+#define ENETC_PCS_REPL_LINK_TIMER_1 0x12
+#define ENETC_PCS_REPL_LINK_TIMER_1_DEF 0x0003
+#define ENETC_PCS_REPL_LINK_TIMER_2 0x13
+#define ENETC_PCS_REPL_LINK_TIMER_2_DEF 0x06a0
+
+/* ENETC external MDIO registers */
+#define ENETC_MDIO_BASE 0x1c00
+#define ENETC_MDIO_CFG 0x00
+#define ENETC_EMDIO_CFG_C22 0x00809508
+#define ENETC_EMDIO_CFG_C45 0x00809548
+#define ENETC_EMDIO_CFG_RD_ER BIT(1)
+#define ENETC_EMDIO_CFG_BSY BIT(0)
+#define ENETC_MDIO_CTL 0x04
+#define ENETC_MDIO_CTL_READ BIT(15)
+#define ENETC_MDIO_DATA 0x08
+#define ENETC_MDIO_STAT 0x0c
+
+#define ENETC_MDIO_READ_ERR 0xffff
+
+struct enetc_mdio_priv {
+ void __iomem *regs_base;
+ struct mii_bus bus;
+};
+
+/*
+ * these functions are implemented by ENETC_MDIO and are re-used by ENETC driver
+ * to drive serdes / internal SoC PHYs
+ */
+int enetc_mdio_read_priv(struct enetc_mdio_priv *priv, int addr, int devad,
+ int reg);
+int enetc_mdio_write_priv(struct enetc_mdio_priv *priv, int addr, int devad,
+ int reg, u16 val);
+
+/* sets up primary MAC addresses in DT/IERB */
+void fdt_fixup_enetc_mac(void *blob);
+
+#endif /* _ENETC_H */
diff --git a/drivers/net/fsl_enetc_mdio.c b/drivers/net/fsl_enetc_mdio.c
new file mode 100644
index 0000000000..773d4afd52
--- /dev/null
+++ b/drivers/net/fsl_enetc_mdio.c
@@ -0,0 +1,127 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * ENETC ethernet controller driver
+ * Copyright 2019 NXP
+ */
+
+#include <common.h>
+#include <net.h>
+#include <linux/phy.h>
+#include <linux/pci.h>
+#include <io.h>
+#include <linux/mdio.h>
+
+#include "fsl_enetc.h"
+
+static void enetc_mdio_wait_bsy(struct enetc_mdio_priv *priv)
+{
+ int to = 10000;
+
+ while ((enetc_read(priv, ENETC_MDIO_CFG) & ENETC_EMDIO_CFG_BSY) &&
+ --to)
+ cpu_relax();
+}
+
+int enetc_mdio_read_priv(struct enetc_mdio_priv *priv, int addr, int devad,
+ int reg)
+{
+ if (devad == MDIO_DEVAD_NONE)
+ enetc_write(priv, ENETC_MDIO_CFG, ENETC_EMDIO_CFG_C22);
+ else
+ enetc_write(priv, ENETC_MDIO_CFG, ENETC_EMDIO_CFG_C45);
+ enetc_mdio_wait_bsy(priv);
+
+ if (devad == MDIO_DEVAD_NONE) {
+ enetc_write(priv, ENETC_MDIO_CTL, ENETC_MDIO_CTL_READ |
+ (addr << 5) | reg);
+ } else {
+ enetc_write(priv, ENETC_MDIO_CTL, (addr << 5) + devad);
+ enetc_mdio_wait_bsy(priv);
+
+ enetc_write(priv, ENETC_MDIO_STAT, reg);
+ enetc_mdio_wait_bsy(priv);
+
+ enetc_write(priv, ENETC_MDIO_CTL, ENETC_MDIO_CTL_READ |
+ (addr << 5) | devad);
+ }
+
+ enetc_mdio_wait_bsy(priv);
+ if (enetc_read(priv, ENETC_MDIO_CFG) & ENETC_EMDIO_CFG_RD_ER)
+ return ENETC_MDIO_READ_ERR;
+
+ return enetc_read(priv, ENETC_MDIO_DATA);
+}
+
+int enetc_mdio_write_priv(struct enetc_mdio_priv *priv, int addr, int devad,
+ int reg, u16 val)
+{
+ if (devad == MDIO_DEVAD_NONE)
+ enetc_write(priv, ENETC_MDIO_CFG, ENETC_EMDIO_CFG_C22);
+ else
+ enetc_write(priv, ENETC_MDIO_CFG, ENETC_EMDIO_CFG_C45);
+ enetc_mdio_wait_bsy(priv);
+
+ if (devad != MDIO_DEVAD_NONE) {
+ enetc_write(priv, ENETC_MDIO_CTL, (addr << 5) + devad);
+ enetc_write(priv, ENETC_MDIO_STAT, reg);
+ } else {
+ enetc_write(priv, ENETC_MDIO_CTL, (addr << 5) + reg);
+ }
+ enetc_mdio_wait_bsy(priv);
+
+ enetc_write(priv, ENETC_MDIO_DATA, val);
+ enetc_mdio_wait_bsy(priv);
+
+ return 0;
+}
+
+static int enetc_mdio_read(struct mii_bus *bus, int addr, int reg)
+{
+ struct enetc_mdio_priv *priv = bus->priv;
+
+ return enetc_mdio_read_priv(priv, addr, MDIO_DEVAD_NONE, reg);
+}
+
+static int enetc_mdio_write(struct mii_bus *bus, int addr, int reg, u16 val)
+{
+ struct enetc_mdio_priv *priv = bus->priv;
+
+ return enetc_mdio_write_priv(priv, addr, MDIO_DEVAD_NONE, reg, val);
+}
+
+static int enetc_mdio_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ struct enetc_mdio_priv *priv;
+
+ pci_enable_device(pdev);
+ pci_set_master(pdev);
+
+ priv = xzalloc(sizeof(*priv));
+
+ priv->regs_base = pci_iomap(pdev, 0);
+ if (!priv->regs_base) {
+ dev_err(&pdev->dev, "failed to map BAR0\n");
+ return -EINVAL;
+ }
+
+ priv->regs_base += ENETC_MDIO_BASE;
+
+ priv->bus.read = enetc_mdio_read;
+ priv->bus.write = enetc_mdio_write;
+ priv->bus.parent = &pdev->dev;
+ priv->bus.priv = priv;
+
+ return mdiobus_register(&priv->bus);
+}
+
+static DEFINE_PCI_DEVICE_TABLE(enetc_mdio_pci_tbl) = {
+ { PCI_DEVICE(PCI_VENDOR_ID_FREESCALE, PCI_DEVICE_ID_ENETC_MDIO) },
+ { },
+};
+
+static struct pci_driver enetc_mdio_driver = {
+ .name = "fsl_enetc_mdio",
+ .id_table = enetc_mdio_pci_tbl,
+ .probe = enetc_mdio_probe,
+};
+device_pci_driver(enetc_mdio_driver);
--
2.39.2
^ permalink raw reply [flat|nested] 5+ messages in thread