This is the PURSS Ethernet driver for TI AM654 Sr2.0 and laterSoCs
with the ICSSG PRU Sub-system running EMAC firmware.
This driver caters to either of the slices(pru/rtu pair)
of the icssg subsystem.
One and exactly one of the slices is supported
as the u-boot ethernet supports probing one interface
at a time.
Signed-off-by: MD Danish Anwar <danishan...@ti.com>
---
drivers/net/ti/Kconfig | 8 +
drivers/net/ti/Makefile | 1 +
drivers/net/ti/icssg_prueth.c | 589 ++++++++++++++++++++++++++++++++++
3 files changed, 598 insertions(+)
create mode 100644 drivers/net/ti/icssg_prueth.c
diff --git a/drivers/net/ti/Kconfig b/drivers/net/ti/Kconfig
index c75f418628..9fead2c7ce 100644
--- a/drivers/net/ti/Kconfig
+++ b/drivers/net/ti/Kconfig
@@ -49,3 +49,11 @@ config TI_AM65_CPSW_NUSS
help
This driver supports TI K3 MCU CPSW Nuss Ethernet controller
in Texas Instruments K3 AM65x SoCs.
+
+config TI_ICSSG_PRUETH
+ bool "TI Gigabit PRU Ethernet driver"
+ depends on ARCH_K3
+ select PHYLIB
+ help
+ Support Gigabit Ethernet ports over the ICSSG PRU Subsystem
+ This subsystem is available starting with the AM65 platform.
diff --git a/drivers/net/ti/Makefile b/drivers/net/ti/Makefile
index 0ce0cf2828..5af760572f 100644
--- a/drivers/net/ti/Makefile
+++ b/drivers/net/ti/Makefile
@@ -6,3 +6,4 @@ obj-$(CONFIG_DRIVER_TI_CPSW) += cpsw.o cpsw-common.o cpsw_mdio.o
obj-$(CONFIG_DRIVER_TI_EMAC) += davinci_emac.o
obj-$(CONFIG_DRIVER_TI_KEYSTONE_NET) += keystone_net.o cpsw_mdio.o
obj-$(CONFIG_TI_AM65_CPSW_NUSS) += am65-cpsw-nuss.o cpsw_mdio.o
+obj-$(CONFIG_TI_ICSSG_PRUETH) += icssg_prueth.o cpsw_mdio.o icssg_classifier.o
icssg_config.o icssg_queues.o
diff --git a/drivers/net/ti/icssg_prueth.c b/drivers/net/ti/icssg_prueth.c
new file mode 100644
index 0000000000..9cc700eca5
--- /dev/null
+++ b/drivers/net/ti/icssg_prueth.c
@@ -0,0 +1,589 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Texas Instruments K3 AM65 PRU Ethernet Driver
+ *
+ * Copyright (C) 2019-2021, Texas Instruments, Incorporated
+ *
+ */
+
+#include <asm/io.h>
+#include <asm/processor.h>
+#include <clk.h>
+#include <dm/lists.h>
+#include <dm/device.h>
+#include <dma-uclass.h>
+#include <dm/of_access.h>
+#include <fs_loader.h>
+#include <miiphy.h>
+#include <net.h>
+#include <phy.h>
+#include <power-domain.h>
+#include <linux/soc/ti/ti-udma.h>
+#include <regmap.h>
+#include <remoteproc.h>
+#include <syscon.h>
+#include <soc.h>
+#include <linux/pruss_driver.h>
+#include <dm/device_compat.h>
+
+#include "cpsw_mdio.h"
+#include "icssg_prueth.h"
+#include "icss_mii_rt.h"
+
+#define ICSS_SLICE0 0
+#define ICSS_SLICE1 1
+
+#ifdef PKTSIZE_ALIGN
+#define UDMA_RX_BUF_SIZE PKTSIZE_ALIGN
+#else
+#define UDMA_RX_BUF_SIZE ALIGN(1522, ARCH_DMA_MINALIGN)
+#endif
+
+#ifdef PKTBUFSRX
+#define UDMA_RX_DESC_NUM PKTBUFSRX
+#else
+#define UDMA_RX_DESC_NUM 4
+#endif
+
+/* Config region lies in shared RAM */
+#define ICSS_CONFIG_OFFSET_SLICE0 0
+#define ICSS_CONFIG_OFFSET_SLICE1 0x8000
+
+/* Firmware flags */
+#define ICSS_SET_RUN_FLAG_VLAN_ENABLE BIT(0) /* switch only */
+#define ICSS_SET_RUN_FLAG_FLOOD_UNICAST BIT(1) /* switch only
*/
+#define ICSS_SET_RUN_FLAG_PROMISC BIT(2) /* MAC only */
+#define ICSS_SET_RUN_FLAG_MULTICAST_PROMISC BIT(3) /* MAC only */
+
+/* CTRLMMR_ICSSG_RGMII_CTRL register bits */
+#define ICSSG_CTRL_RGMII_ID_MODE BIT(24)
+
+/* Management packet type */
+#define PRUETH_PKT_TYPE_CMD 0x10
+
+static int icssg_phy_init(struct udevice *dev)
+{
+ struct prueth *priv = dev_get_priv(dev);
+ struct phy_device *phydev;
+ u32 supported = PHY_GBIT_FEATURES;
+ int ret;
+
+ phydev = phy_connect(priv->bus,
+ priv->phy_addr,
+ priv->dev,
+ priv->phy_interface);
+
+ if (!phydev) {
+ dev_err(dev, "phy_connect() failed\n");
+ return -ENODEV;
+ }
+
+ /* disable unsupported features */
+ supported &= ~(PHY_10BT_FEATURES |
+ SUPPORTED_100baseT_Half |
+ SUPPORTED_1000baseT_Half |
+ SUPPORTED_Pause |
+ SUPPORTED_Asym_Pause);
+
+ phydev->supported &= supported;
+ phydev->advertising = phydev->supported;
+
+ if (IS_ENABLED(CONFIG_DM_ETH))
+ if (ofnode_valid(priv->phy_node))
+ phydev->node = priv->phy_node;
+
+ priv->phydev = phydev;
+ ret = phy_config(phydev);
+ if (ret < 0)
+ pr_err("phy_config() failed: %d", ret);
+
+ return ret;
+}
+
+static int icssg_mdio_init(struct udevice *dev)
+{
+ struct prueth *prueth = dev_get_priv(dev);
+
+ prueth->bus = cpsw_mdio_init(dev->name, prueth->mdio_base,
+ prueth->mdio_freq,
+ clk_get_rate(&prueth->mdiofck),
+ prueth->mdio_manual_mode);
+ if (!prueth->bus)
+ return -EFAULT;
+
+ return 0;
+}
+
+static void icssg_config_set_speed(struct prueth *priv, int speed)
+{
+ u8 fw_speed;
+
+ switch (speed) {
+ case SPEED_1000:
+ fw_speed = FW_LINK_SPEED_1G;
+ break;
+ case SPEED_100:
+ fw_speed = FW_LINK_SPEED_100M;
+ break;
+ case SPEED_10:
+ fw_speed = FW_LINK_SPEED_10M;
+ break;
+ default:
+ /* Other links speeds not supported */
+ dev_err(priv->dev, "Unsupported link speed\n");
+ return;
+ }
+
+ writeb(fw_speed, priv->dram.pa + PORT_LINK_SPEED_OFFSET);
+}
+
+static int icssg_update_link(struct prueth *priv)
+{
+ struct phy_device *phy = priv->phydev;
+ bool gig_en = false, full_duplex = false;
+
+ if (phy->link) { /* link up */
+ if (phy->speed == SPEED_1000)
+ gig_en = true;
+ if (phy->duplex == DUPLEX_FULL)
+ full_duplex = true;
+ /* Set the RGMII cfg for gig en and full duplex */
+ icssg_update_rgmii_cfg(priv->miig_rt, phy->speed, full_duplex,
+ priv->slice, priv);
+ /* update the Tx IPG based on 100M/1G speed */
+ icssg_config_ipg(priv, phy->speed, priv->slice);
+
+ /* Send command to firmware to update Speed setting */
+ icssg_config_set_speed(priv, phy->speed);
+
+ /* Enable PORT FORWARDING */
+ emac_set_port_state(priv, ICSSG_EMAC_PORT_FORWARD);
+
+ printf("link up on port %d, speed %d, %s duplex\n",
+ priv->port_id, phy->speed,
+ (phy->duplex == DUPLEX_FULL) ? "full" : "half");
+ } else {
+ emac_set_port_state(priv, ICSSG_EMAC_PORT_DISABLE);
+ printf("link down on port %d\n", priv->port_id);
+ }
+
+ return phy->link;
+}
+
+static int prueth_start(struct udevice *dev)
+{
+ struct ti_udma_drv_chan_cfg_data *dma_rx_cfg_data;
+ struct prueth *priv = dev_get_priv(dev);
+ struct icssg_flow_cfg *flow_cfg;
+ char chn_name[16];
+ void *config;
+ int ret, i;
+
+ /* To differentiate channels for SLICE0 vs SLICE1 */
+ snprintf(chn_name, sizeof(chn_name), "tx%d-0", priv->slice);
+
+ ret = dma_get_by_name(dev, chn_name, &priv->dma_tx);
+ if (ret)
+ dev_err(dev, "TX dma get failed %d\n", ret);
+
+ snprintf(chn_name, sizeof(chn_name), "rx%d", priv->slice);
+ ret = dma_get_by_name(dev, chn_name, &priv->dma_rx);
+ if (ret)
+ dev_err(dev, "RX dma get failed %d\n", ret);
+
+ for (i = 0; i < UDMA_RX_DESC_NUM; i++) {
+ ret = dma_prepare_rcv_buf(&priv->dma_rx,
+ net_rx_packets[i],
+ UDMA_RX_BUF_SIZE);
+ if (ret)
+ dev_err(dev, "RX dma add buf failed %d\n", ret);
+ }
+
+ ret = dma_enable(&priv->dma_tx);
+ if (ret) {
+ dev_err(dev, "TX dma_enable failed %d\n", ret);
+ goto tx_fail;
+ }
+
+ ret = dma_enable(&priv->dma_rx);
+ if (ret) {
+ dev_err(dev, "RX dma_enable failed %d\n", ret);
+ goto rx_fail;
+ }
+
+ /* check if the rx_flow_id of dma_rx is as expected since
+ * driver hardcode that value in config struct to firmware
+ * in probe. Just add this sanity check to catch any change
+ * to rx channel assignment in the future.
+ */
+ dma_get_cfg(&priv->dma_rx, 0, (void **)&dma_rx_cfg_data);
+ config = (void *)(priv->dram.pa + ICSSG_CONFIG_OFFSET);
+ flow_cfg = config + PSI_L_REGULAR_FLOW_ID_BASE_OFFSET;
+ writew(dma_rx_cfg_data->flow_id_base, &flow_cfg->rx_base_flow);
+ writew(0, &flow_cfg->mgm_base_flow);
+
+ dev_info(dev, "K3 ICSSG: rflow_id_base: %u, chn_name = %s\n",
+ dma_rx_cfg_data->flow_id_base, chn_name);
+
+ ret = phy_startup(priv->phydev);
+ if (ret) {
+ dev_err(dev, "phy_startup failed\n");
+ goto phy_fail;
+ }
+
+ ret = icssg_update_link(priv);
+ if (!ret) {
+ ret = -ENODEV;
+ goto phy_shut;
+ }
+
+ return 0;
+
+phy_shut:
+ phy_shutdown(priv->phydev);
+phy_fail:
+ dma_disable(&priv->dma_rx);
+ dma_free(&priv->dma_rx);
+rx_fail:
+ dma_disable(&priv->dma_tx);
+ dma_free(&priv->dma_tx);
+
+tx_fail:
+ icssg_class_disable(priv->miig_rt, priv->slice);
+
+ return ret;
+}
+
+static int prueth_send(struct udevice *dev, void *packet, int length)
+{
+ struct prueth *priv = dev_get_priv(dev);
+ int ret;
+
+ ret = dma_send(&priv->dma_tx, packet, length, NULL);
+
+ return ret;
+}
+
+static int prueth_recv(struct udevice *dev, int flags, uchar **packetp)
+{
+ struct prueth *priv = dev_get_priv(dev);
+ int ret;
+
+ /* try to receive a new packet */
+ ret = dma_receive(&priv->dma_rx, (void **)packetp, NULL);
+
+ return ret;
+}
+
+static int prueth_free_pkt(struct udevice *dev, uchar *packet, int length)
+{
+ struct prueth *priv = dev_get_priv(dev);
+ int ret = 0;
+
+ if (length > 0) {
+ u32 pkt = priv->rx_next % UDMA_RX_DESC_NUM;
+
+ dev_dbg(dev, "%s length:%d pkt:%u\n", __func__, length, pkt);
+
+ ret = dma_prepare_rcv_buf(&priv->dma_rx,
+ net_rx_packets[pkt],
+ UDMA_RX_BUF_SIZE);
+ priv->rx_next++;
+ }
+
+ return ret;
+}
+
+static void prueth_stop(struct udevice *dev)
+{
+ struct prueth *priv = dev_get_priv(dev);
+
+ phy_shutdown(priv->phydev);
+
+ dma_disable(&priv->dma_tx);
+ dma_free(&priv->dma_tx);
+
+ dma_disable(&priv->dma_rx);
+ dma_free(&priv->dma_rx);
+}
+
+static int prueth_write_hwaddr(struct udevice *dev)
+{
+ struct eth_pdata *pdata = dev_get_plat(dev);
+ struct prueth *prueth = dev_get_priv(dev);
+ u8 *hwaddr = pdata->enetaddr;
+
+ icssg_class_set_mac_addr(prueth->miig_rt, prueth->slice, hwaddr);
+
+ icssg_ft1_set_mac_addr(prueth->miig_rt, prueth->slice, hwaddr);
+
+ icssg_class_default(prueth->miig_rt, prueth->slice, 0);
+
+ /* Set Load time configuration */
+ icssg_config(prueth);
+
+ dev_dbg(dev, "Set MAC address to %pM\n", hwaddr);
+ return 0;
+}
+
+static const struct eth_ops prueth_ops = {
+ .start = prueth_start,
+ .send = prueth_send,
+ .recv = prueth_recv,
+ .free_pkt = prueth_free_pkt,
+ .stop = prueth_stop,
+ .write_hwaddr = prueth_write_hwaddr,
+};
+
+static int icssg_ofdata_parse_phy(struct udevice *dev, ofnode port_np)
+{
+ struct prueth *priv = dev_get_priv(dev);
+ struct ofnode_phandle_args out_args;
+ int ret = 0;
+
+ priv->phy_interface = ofnode_read_phy_mode(port_np);
+
+ if (priv->phy_interface == PHY_INTERFACE_MODE_NA) {
+ dev_err(dev, "Invalid PHY mode '%s'\n",
+ phy_string_for_interface(priv->phy_interface));
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = ofnode_parse_phandle_with_args(port_np, "phy-handle",
+ NULL, 0, 0, &out_args);
+ if (ret) {
+ dev_err(dev, "can't parse phy-handle port (%d)\n", ret);
+ ret = 0;
+ }
+
+ priv->phy_node = out_args.node;
+ ret = ofnode_read_u32(priv->phy_node, "reg", &priv->phy_addr);
+ if (ret)
+ dev_err(dev, "failed to get phy_addr port (%d)\n", ret);
+
+out:
+ return ret;
+}
+
+static const struct soc_attr k3_mdio_soc_data[] = {
+ { .family = "AM62X", .revision = "SR1.0" },
+ { .family = "AM64X", .revision = "SR1.0" },
+ { .family = "AM64X", .revision = "SR2.0" },
+ { .family = "AM65X", .revision = "SR1.0" },
+ { .family = "AM65X", .revision = "SR2.0" },
+ { .family = "J7200", .revision = "SR1.0" },
+ { .family = "J7200", .revision = "SR2.0" },
+ { .family = "J721E", .revision = "SR1.0" },
+ { .family = "J721E", .revision = "SR1.1" },
+ { .family = "J721S2", .revision = "SR1.0" },
+ { /* sentinel */ },
+};
+
+static int prueth_probe(struct udevice *dev)
+{
+ ofnode eth_ports_node, eth0_node, eth1_node, eth_node;
+ ofnode node, pruss_node, mdio_node, sram_node;
+ struct prueth *prueth = dev_get_priv(dev);
+ struct udevice **prussdev = NULL;
+ u32 phandle, err, sp;
+ int ret = 0;
+
+ prueth = dev_get_priv(dev);
+ prueth->dev = dev;
+ err = ofnode_read_u32(dev_ofnode(dev), "ti,prus", &phandle);
+ if (err)
+ return err;
+
+ node = ofnode_get_by_phandle(phandle);
+ if (!ofnode_valid(node))
+ return -EINVAL;
+
+ pruss_node = ofnode_get_parent(node);
+ ret = device_get_global_by_ofnode(pruss_node, prussdev);
+ if (ret)
+ dev_err(dev, "error getting the pruss dev\n");
+ prueth->pruss = *prussdev;
+
+ ret = pruss_request_mem_region(*prussdev, PRUSS_MEM_SHRD_RAM2,
+ &prueth->shram);
+ if (ret)
+ return ret;
+
+ ret = pruss_request_tm_region(*prussdev, &prueth->tmaddr);
+ if (ret)
+ return ret;
+
+ eth_ports_node = dev_read_subnode(dev, "ethernet-ports");
+ if (!ofnode_valid(eth_ports_node))
+ return -ENOENT;
+
+ ofnode_for_each_subnode(eth_node, eth_ports_node) {
+ const char *node_name;
+ u32 reg;
+
+ node_name = ofnode_get_name(eth_node);
+ ret = ofnode_read_u32(eth_node, "reg", ®);
+ if (ret)
+ dev_err(dev, "%s: error reading port_id (%d)\n",
node_name, ret);
+
+ if (reg >= PRUETH_NUM_MACS) {
+ dev_err(dev, "%s: invalid port_id (%d)\n", node_name,
reg);
+ return -EINVAL;
+ }
+
+ if (reg == 0)
+ eth0_node = eth_node;
+ else if (reg == 1)
+ eth1_node = eth_node;
+ else
+ dev_err(dev, "port reg should be 0 or 1\n");
+ }
+
+ /* one node must be present and available else we fail */
+ if (!ofnode_is_enabled(eth0_node) && !ofnode_is_enabled(eth1_node)) {
+ dev_err(dev, "neither port@0 nor port@1 node available\n");
+ return -ENODEV;
+ }
+
+ /*
+ * Uboot ethernet framework does not support two interfaces in a single
+ * probe. If the eth0_node is enabled in DT, we'll only probe eth0_node.
+ * If the eth0_node is not enabled in DT, we'll check for eth1_node and
+ * probe the eth1_node if enabled.
+ */
+ if (ofnode_is_enabled(eth0_node)) {
+ if (ofnode_valid(eth0_node) && ofnode_is_enabled(eth0_node)) {
+ prueth->slice = 0;
+ icssg_ofdata_parse_phy(dev, eth0_node);
+ prueth->eth_node[PRUETH_MAC0] = eth0_node;
+ dev_dbg(dev, "Using port0\n");
+ }
+ } else if (ofnode_is_enabled(eth1_node)) {
+ if (ofnode_valid(eth1_node) && ofnode_is_enabled(eth1_node)) {
+ prueth->slice = 1;
+ icssg_ofdata_parse_phy(dev, eth1_node);
+ prueth->eth_node[PRUETH_MAC0] = eth1_node;
+ dev_dbg(dev, "Using port1\n");
+ }
+ }
+
+ ret = pruss_request_mem_region(*prussdev,
+ prueth->slice ? PRUSS_MEM_DRAM1 :
PRUSS_MEM_DRAM0,
+ &prueth->dram);
+ if (ret) {
+ dev_err(dev, "could not request DRAM%d region\n",
prueth->slice);
+ return ret;
+ }
+
+ prueth->miig_rt = syscon_regmap_lookup_by_phandle(dev, "ti,mii-g-rt");
+ if (!prueth->miig_rt) {
+ dev_err(dev, "couldn't get mii-g-rt syscon regmap\n");
+ return -ENODEV;
+ }
+
+ prueth->mii_rt = syscon_regmap_lookup_by_phandle(dev, "ti,mii-rt");
+ if (!prueth->mii_rt) {
+ dev_err(dev, "couldn't get mii-rt syscon regmap\n");
+ return -ENODEV;
+ }
+
+ ret = ofnode_read_u32(dev_ofnode(dev), "sram", &sp);
+ if (ret) {
+ dev_err(dev, "sram node fetch failed %d\n", ret);
+ return ret;
+ }
+
+ sram_node = ofnode_get_by_phandle(sp);
+ if (!ofnode_valid(sram_node))
+ return -EINVAL;
+
+ prueth->sram_pa = ofnode_get_addr(sram_node);
+ if (prueth->sram_pa % SZ_64K != 0) {
+ /* This is constraint for SR2.0 firmware */
+ dev_err(dev, "sram address needs to be 64KB aligned\n");
+ return -EINVAL;
+ }
+
+ if (prueth->phy_interface != PHY_INTERFACE_MODE_MII &&
+ prueth->phy_interface < PHY_INTERFACE_MODE_RGMII &&
+ prueth->phy_interface > PHY_INTERFACE_MODE_RGMII_TXID) {
+ dev_err(prueth->dev, "PHY mode unsupported %s\n",
+ phy_string_for_interface(prueth->phy_interface));
+ return -EINVAL;
+ }
+
+ /* AM65 SR2.0 has TX Internal delay always enabled by hardware
+ * and it is not possible to disable TX Internal delay. The below
+ * switch case block describes how we handle different phy modes
+ * based on hardware restriction.
+ */
+ switch (prueth->phy_interface) {
+ case PHY_INTERFACE_MODE_RGMII_ID:
+ prueth->phy_interface = PHY_INTERFACE_MODE_RGMII_RXID;
+ break;
+ case PHY_INTERFACE_MODE_RGMII_TXID:
+ prueth->phy_interface = PHY_INTERFACE_MODE_RGMII;
+ break;
+ case PHY_INTERFACE_MODE_RGMII:
+ case PHY_INTERFACE_MODE_RGMII_RXID:
+ dev_err(prueth->dev, "RGMII mode without TX delay is not
supported");
+ return -EINVAL;
+ default:
+ break;
+ }
+
+ mdio_node = ofnode_find_subnode(pruss_node, "mdio");
+ prueth->mdio_base = ofnode_get_addr(mdio_node);
+ ofnode_read_u32(mdio_node, "bus_freq", &prueth->mdio_freq);
+
+ ret = clk_get_by_name_nodev(mdio_node, "fck", &prueth->mdiofck);
+ if (ret) {
+ dev_err(dev, "failed to get clock %d\n", ret);
+ return ret;
+ }
+
+ ret = clk_enable(&prueth->mdiofck);
+ if (ret) {
+ dev_err(dev, "clk_enable failed %d\n", ret);
+ return ret;
+ }
+
+ prueth->mdio_manual_mode = false;
+ if (soc_device_match(k3_mdio_soc_data))
+ prueth->mdio_manual_mode = true;
+
+ ret = icssg_mdio_init(dev);
+ if (ret)
+ return ret;
+
+ ret = icssg_phy_init(dev);
+ if (ret) {
+ dev_err(dev, "phy_init failed\n");
+ goto out;
+ }
+
+ return 0;
+out:
+ cpsw_mdio_free(prueth->bus);
+ clk_disable(&prueth->mdiofck);
+
+ return ret;
+}
+
+static const struct udevice_id prueth_ids[] = {
+ { .compatible = "ti,am654-icssg-prueth" },
+ { .compatible = "ti,am642-icssg-prueth" },
+ { }
+};
+
+U_BOOT_DRIVER(prueth) = {
+ .name = "prueth",
+ .id = UCLASS_ETH,
+ .of_match = prueth_ids,
+ .probe = prueth_probe,
+ .ops = &prueth_ops,
+ .priv_auto = sizeof(struct prueth),
+ .plat_auto = sizeof(struct eth_pdata),
+ .flags = DM_FLAG_ALLOC_PRIV_DMA,
+};
--
2.34.1
