From mboxrd@z Thu Jan 1 00:00:00 1970 Delivery-date: Tue, 17 Aug 2021 12:07:28 +0200 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by lore.white.stw.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1mFw0F-0005ip-W9 for lore@lore.pengutronix.de; Tue, 17 Aug 2021 12:07:28 +0200 Received: from bombadil.infradead.org ([2607:7c80:54:e::133]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mFw0A-0001zN-EP for lore@pengutronix.de; Tue, 17 Aug 2021 12:07:27 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=sYQKDPlI9O/K76Cqhm+5bIROqfiKLrlw/yQmSr3nkm4=; b=Ztty5W78siWNp+ jIgteSDELmdQvpOCznpg05h8xCCY3Ep3n27kdNBINxWGMZ47EJ6Y9kDPC5jTlUnUR4uuduCfuw8q3 8ZZvJnqqlXCiXJIIJ5XkkWQRq53Pbs1WGQn/oWNTjo1zHgbBlBIooG9VI7G+LJ9WG2zLHVimFe3/8 kU+br0oqiJ5rlxrj3UhCUN74eUSLuVomsCwS7qdCCfrMBrNEzeHr5bfYrT//sp1JHDbPZ2g7/illr lMxEpZnJNhFZ3DGbCzzPi5mPPP5ASwEX/w5FginiWkbeCSVsd31V/3IRHNhRCuRTvFZQxs0uD3XXI 7/XO7KyRUav5AIO2nMfA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mFvyJ-001zD5-RK; Tue, 17 Aug 2021 10:05:28 +0000 Received: from mail-lf1-x12b.google.com ([2a00:1450:4864:20::12b]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mFvxl-001yzq-Vm for barebox@lists.infradead.org; Tue, 17 Aug 2021 10:04:58 +0000 Received: by mail-lf1-x12b.google.com with SMTP id r9so30880700lfn.3 for ; Tue, 17 Aug 2021 03:04:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=uMECzGU3kv0hXykM2InkBjlKq7JGmwUWZWbdQD4SpxI=; b=ADVIOVF8o8cT/fBwzJ9t+aUrPoFHLEoyBvbmo2vXKRtTydZ2gJOOvFBnZwDSBUjgOa GA7OFlSK9IJHLFqQVTV5F1vnd5f1UcFprTyKEQM8/U67xh4xyoieB9a15H+Jd+cJOSDc y8KO0XadHoPQfw5SqOHaHdd+E7RgT6eQ42/XcHze3IRKVBi73HYRBPF9GTSg3QQ6+8rM T4Z7Gua8esTbWTkRzou/g8IXjw/GxttNQv5pWbOSvwAMLZRohkurgd9EclSsb41AJuec 067cCG44/jF1JxyY7MyQTiGVk9UARoggn3Q3RUUT7PazH2hbhp64yzuD9i+yRnN0Fjo+ N9jA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=uMECzGU3kv0hXykM2InkBjlKq7JGmwUWZWbdQD4SpxI=; b=h0RyI9qh412Ps+NcaEO+p1Dq5vxpuWI5yNzgTOE5PNaJ0+WtQwL+P+96N/6osNj67M CreO17uIp+kbeOkLBcUJJUTExOyJKXqQzkPqZC5zv1GyENySHHDYcyEJBjlAgtLIlx6Z Ujh4RT3GDpcOkV42d/2oWe5C6J7VOqLZlaKOpqunoaihNPEoFvz0dqX/zIOIXkhZVBIa wThhkpJbmTaPRx8Xcq3jrcB476iS4bRnOP2TnnFB88L2NnuLGnGTxpXbvsFlGr+uo3bg 77tTLAAWOJMKCXSg7nev0QRAAQoIJDDoPbka9gMww8fx8C8sBLq/26M8qxRuBi4xNK56 s/Nw== X-Gm-Message-State: AOAM533WpiFQCPIY+RptvTMPPqaU/sXLYDVHpWuiXOUDKzKHrII+VvCU GwqOluhdpbB4l1kAh+Cggo/sH8G2m6Q= X-Google-Smtp-Source: ABdhPJyO2ZNtKrG7n1PVye7czlqeFCGNve70ip99KTv3hGLDSbw6DLy9oAJwgd3CPc3zWUnPyzcgzA== X-Received: by 2002:a05:6512:3c9a:: with SMTP id h26mr1782398lfv.300.1629194692371; Tue, 17 Aug 2021 03:04:52 -0700 (PDT) Received: from localhost.localdomain (109-252-203-80.dynamic.spd-mgts.ru. [109.252.203.80]) by smtp.gmail.com with ESMTPSA id e20sm179795ljn.13.2021.08.17.03.04.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 17 Aug 2021 03:04:52 -0700 (PDT) From: Antony Pavlov To: barebox@lists.infradead.org Date: Tue, 17 Aug 2021 13:04:33 +0300 Message-Id: <20210817100435.114756-7-antonynpavlov@gmail.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210817100435.114756-1-antonynpavlov@gmail.com> References: <20210817100435.114756-1-antonynpavlov@gmail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210817_030454_144780_E5F543FD X-CRM114-Status: GOOD ( 22.49 ) X-BeenThere: barebox@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Marek Czerski , Ahmad Fatoum Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" X-SA-Exim-Connect-IP: 2607:7c80:54:e::133 X-SA-Exim-Mail-From: barebox-bounces+lore=pengutronix.de@lists.infradead.org X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on metis.ext.pengutronix.de X-Spam-Level: X-Spam-Status: No, score=-4.2 required=4.0 tests=AWL,BAYES_00, DKIM_ADSP_CUSTOM_MED,DKIM_SIGNED,DKIM_VALID,FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.2 Subject: [PATCH 6/8] net: add LiteEth driver X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on metis.ext.pengutronix.de) LiteEth provides a small footprint and configurable Ethernet core. LiteEth is part of LiteX libraries whose aims are to lower entry level of complex FPGA cores by providing simple, elegant and efficient implementations of components used in today's SoC such as Ethernet, SATA, PCIe, SDRAM Controller... Using Migen to describe the HDL allows the core to be highly and easily configurable. LiteEth can be used as LiteX library or can be integrated with your standard design flow by generating the verilog rtl that you will use as a standard core. See https://github.com/enjoy-digital/liteeth for details. Signed-off-by: Antony Pavlov Signed-off-by: Marek Czerski --- drivers/net/Kconfig | 8 + drivers/net/Makefile | 1 + drivers/net/liteeth.c | 376 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 385 insertions(+) diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig index 802169a86e..781c7e69db 100644 --- a/drivers/net/Kconfig +++ b/drivers/net/Kconfig @@ -285,6 +285,14 @@ config TSE_USE_DEDICATED_DESC_MEM reserved with a malloc but directly mapped to the memory address (defined in config.h) +config DRIVER_NET_LITEETH + bool "LiteX ethernet driver" + select PHYLIB + select MDIO_BITBANG + help + This option enables support for the LiteX LiteEth + ethernet IP core. + source "drivers/net/phy/Kconfig" source "drivers/net/usb/Kconfig" diff --git a/drivers/net/Makefile b/drivers/net/Makefile index fb3e3bdee4..466c910b3e 100644 --- a/drivers/net/Makefile +++ b/drivers/net/Makefile @@ -38,3 +38,4 @@ obj-$(CONFIG_DRIVER_NET_TAP) += tap.o obj-$(CONFIG_DRIVER_NET_TSE) += altera_tse.o obj-$(CONFIG_DRIVER_NET_EFI_SNP) += efi-snp.o obj-$(CONFIG_DRIVER_NET_AG71XX) += ag71xx.o +obj-$(CONFIG_DRIVER_NET_LITEETH) += liteeth.o diff --git a/drivers/net/liteeth.c b/drivers/net/liteeth.c new file mode 100644 index 0000000000..137cb854c5 --- /dev/null +++ b/drivers/net/liteeth.c @@ -0,0 +1,376 @@ +/* + * LiteX Liteeth Ethernet + * + * Copyright 2017 Joel Stanley + * + * Ported to barebox from linux kernel + * Copyright (C) 2019-2021 Antony Pavlov + * Copyright (C) 2021 Marek Czerski + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define DRV_NAME "liteeth" + +#define LITEETH_WRITER_SLOT 0x00 +#define LITEETH_WRITER_LENGTH 0x04 +#define LITEETH_WRITER_ERRORS 0x08 +#define LITEETH_WRITER_EV_STATUS 0x0c +#define LITEETH_WRITER_EV_PENDING 0x10 +#define LITEETH_WRITER_EV_ENABLE 0x14 +#define LITEETH_READER_START 0x18 +#define LITEETH_READER_READY 0x1c +#define LITEETH_READER_LEVEL 0x20 +#define LITEETH_READER_SLOT 0x24 +#define LITEETH_READER_LENGTH 0x28 +#define LITEETH_READER_EV_STATUS 0x2c +#define LITEETH_READER_EV_PENDING 0x30 +#define LITEETH_READER_EV_ENABLE 0x34 +#define LITEETH_PREAMBLE_CRC 0x38 +#define LITEETH_PREAMBLE_ERRORS 0x3c +#define LITEETH_CRC_ERRORS 0x40 + +#define LITEETH_PHY_CRG_RESET 0x00 +#define LITEETH_MDIO_W 0x04 +#define MDIO_W_CLK BIT(0) +#define MDIO_W_OE BIT(1) +#define MDIO_W_DO BIT(2) + +#define LITEETH_MDIO_R 0x08 +#define MDIO_R_DI BIT(0) + +#define LITEETH_BUFFER_SIZE 0x800 +#define MAX_PKT_SIZE LITEETH_BUFFER_SIZE + +struct liteeth { + struct device_d *dev; + struct eth_device edev; + void __iomem *base; + void __iomem *mdio_base; + struct mii_bus *mii_bus; + struct mdiobb_ctrl mdiobb; + + /* Link management */ + int cur_duplex; + int cur_speed; + + /* Tx */ + int tx_slot; + int num_tx_slots; + void __iomem *tx_base; + + /* Rx */ + int rx_slot; + int num_rx_slots; + void __iomem *rx_base; +}; + +static inline void litex_write8(void __iomem *addr, u8 val) +{ + writeb(val, addr); +} + +static inline void litex_write16(void __iomem *addr, u16 val) +{ + writew(val, addr); +} + +static inline u8 litex_read8(void __iomem *addr) +{ + return readb(addr); +} + +static inline u32 litex_read32(void __iomem *addr) +{ + return readl(addr); +} + +static void liteeth_mdio_w_modify(struct liteeth *priv, u8 clear, u8 set) +{ + void __iomem *mdio_w = priv->mdio_base + LITEETH_MDIO_W; + + litex_write8(mdio_w, (litex_read8(mdio_w) & ~clear) | set); +} + +static void liteeth_mdio_ctrl(struct mdiobb_ctrl *ctrl, u8 mask, int set) +{ + struct liteeth *priv = container_of(ctrl, struct liteeth, mdiobb); + + liteeth_mdio_w_modify(priv, mask, set ? mask : 0); +} + +/* MDC pin control */ +static void liteeth_set_mdc(struct mdiobb_ctrl *ctrl, int level) +{ + liteeth_mdio_ctrl(ctrl, MDIO_W_CLK, level); +} + +/* Data I/O pin control */ +static void liteeth_set_mdio_dir(struct mdiobb_ctrl *ctrl, int output) +{ + liteeth_mdio_ctrl(ctrl, MDIO_W_OE, output); +} + +/* Set data bit */ +static void liteeth_set_mdio_data(struct mdiobb_ctrl *ctrl, int value) +{ + liteeth_mdio_ctrl(ctrl, MDIO_W_DO, value); +} + +/* Get data bit */ +static int liteeth_get_mdio_data(struct mdiobb_ctrl *ctrl) +{ + struct liteeth *priv = container_of(ctrl, struct liteeth, mdiobb); + + return (litex_read8(priv->mdio_base + LITEETH_MDIO_R) & MDIO_R_DI) != 0; +} + +/* MDIO bus control struct */ +static struct mdiobb_ops bb_ops = { + .set_mdc = liteeth_set_mdc, + .set_mdio_dir = liteeth_set_mdio_dir, + .set_mdio_data = liteeth_set_mdio_data, + .get_mdio_data = liteeth_get_mdio_data, +}; + +static int liteeth_init_dev(struct eth_device *edev) +{ + return 0; +} + +static int liteeth_eth_open(struct eth_device *edev) +{ + struct liteeth *priv = edev->priv; + int ret; + + /* Disable events */ + litex_write8(priv->base + LITEETH_WRITER_EV_ENABLE, 0); + litex_write8(priv->base + LITEETH_READER_EV_ENABLE, 0); + + /* Clear pending events? */ + litex_write8(priv->base + LITEETH_WRITER_EV_PENDING, 1); + litex_write8(priv->base + LITEETH_READER_EV_PENDING, 1); + + ret = phy_device_connect(edev, priv->mii_bus, -1, NULL, 0, -1); + if (ret) + return ret; + + return 0; +} + +static int liteeth_eth_send(struct eth_device *edev, void *packet, + int packet_length) +{ + struct liteeth *priv = edev->priv; + void *txbuffer; + int ret; + u8 val; + u8 reg; + + reg = litex_read8(priv->base + LITEETH_READER_EV_PENDING); + if (reg) { + litex_write8(priv->base + LITEETH_READER_EV_PENDING, reg); + } + + /* Reject oversize packets */ + if (unlikely(packet_length > MAX_PKT_SIZE)) { + dev_err(priv->dev, "tx packet too big\n"); + goto drop; + } + + txbuffer = priv->tx_base + priv->tx_slot * LITEETH_BUFFER_SIZE; + memcpy(txbuffer, packet, packet_length); + litex_write8(priv->base + LITEETH_READER_SLOT, priv->tx_slot); + litex_write16(priv->base + LITEETH_READER_LENGTH, packet_length); + + ret = readb_poll_timeout(priv->base + LITEETH_READER_READY, + val, val, 1000); + if (ret == -ETIMEDOUT) { + dev_err(priv->dev, "LITEETH_READER_READY timed out\n"); + goto drop; + } + + litex_write8(priv->base + LITEETH_READER_START, 1); + + priv->tx_slot = (priv->tx_slot + 1) % priv->num_tx_slots; + +drop: + return 0; +} + +static int liteeth_eth_rx(struct eth_device *edev) +{ + struct liteeth *priv = edev->priv; + u8 rx_slot; + int len = 0; + u8 reg; + + reg = litex_read8(priv->base + LITEETH_WRITER_EV_PENDING); + if (!reg) { + goto done; + } + + len = litex_read32(priv->base + LITEETH_WRITER_LENGTH); + if (len == 0 || len > 2048) { + len = 0; + dev_err(priv->dev, "%s: invalid len %d\n", __func__, len); + litex_write8(priv->base + LITEETH_WRITER_EV_PENDING, reg); + goto done; + } + + rx_slot = litex_read8(priv->base + LITEETH_WRITER_SLOT); + + memcpy(NetRxPackets[0], priv->rx_base + rx_slot * LITEETH_BUFFER_SIZE, len); + + net_receive(edev, NetRxPackets[0], len); + + litex_write8(priv->base + LITEETH_WRITER_EV_PENDING, reg); + +done: + return len; +} + +static void liteeth_eth_halt(struct eth_device *edev) +{ + struct liteeth *priv = edev->priv; + + litex_write8(priv->base + LITEETH_WRITER_EV_ENABLE, 0); + litex_write8(priv->base + LITEETH_READER_EV_ENABLE, 0); +} + +static void liteeth_reset_hw(struct liteeth *priv) +{ + /* Reset, twice */ + litex_write8(priv->base + LITEETH_PHY_CRG_RESET, 0); + udelay(10); + litex_write8(priv->base + LITEETH_PHY_CRG_RESET, 1); + udelay(10); + litex_write8(priv->base + LITEETH_PHY_CRG_RESET, 0); + udelay(10); +} + +static int liteeth_get_ethaddr(struct eth_device *edev, unsigned char *m) +{ + return 0; +} + +static int liteeth_set_ethaddr(struct eth_device *edev, + const unsigned char *mac_addr) +{ + return 0; +} + +static int liteeth_probe(struct device_d *dev) +{ + struct device_node *np = dev->device_node; + struct eth_device *edev; + void __iomem *buf_base; + struct liteeth *priv; + int err; + + priv = xzalloc(sizeof(struct liteeth)); + edev = &priv->edev; + edev->priv = priv; + priv->dev = dev; + + priv->base = dev_request_mem_region(dev, 0); + if (IS_ERR(priv->base)) { + err = PTR_ERR(priv->base); + goto err; + } + + priv->mdio_base = dev_request_mem_region(dev, 1); + if (IS_ERR(priv->mdio_base)) { + err = PTR_ERR(priv->mdio_base); + goto err; + } + + buf_base = dev_request_mem_region(dev, 2); + if (IS_ERR(buf_base)) { + err = PTR_ERR(buf_base); + goto err; + } + + err = of_property_read_u32(np, "rx-fifo-depth", + &priv->num_rx_slots); + if (err) { + dev_err(dev, "unable to get rx-fifo-depth\n"); + goto err; + } + + err = of_property_read_u32(np, "tx-fifo-depth", + &priv->num_tx_slots); + if (err) { + dev_err(dev, "unable to get tx-fifo-depth\n"); + goto err; + } + + /* Rx slots */ + priv->rx_base = buf_base; + priv->rx_slot = 0; + + /* Tx slots come after Rx slots */ + priv->tx_base = buf_base + priv->num_rx_slots * LITEETH_BUFFER_SIZE; + priv->tx_slot = 0; + + edev->init = liteeth_init_dev; + edev->open = liteeth_eth_open; + edev->send = liteeth_eth_send; + edev->recv = liteeth_eth_rx; + edev->get_ethaddr = liteeth_get_ethaddr; + edev->set_ethaddr = liteeth_set_ethaddr; + edev->halt = liteeth_eth_halt; + edev->parent = dev; + + priv->mdiobb.ops = &bb_ops; + + priv->mii_bus = alloc_mdio_bitbang(&priv->mdiobb); + priv->mii_bus->parent = dev; + + liteeth_reset_hw(priv); + + err = eth_register(edev); + if (err) { + dev_err(dev, "failed to register edev\n"); + goto err; + } + + err = mdiobus_register(priv->mii_bus); + if (err) { + dev_err(dev, "failed to register mii_bus\n"); + goto err; + } + + dev_info(dev, DRV_NAME " driver registered\n"); + + return 0; + +err: + return err; +} + +static const struct of_device_id liteeth_dt_ids[] = { + { + .compatible = "litex,liteeth" + }, { + } +}; + +static struct driver_d liteeth_driver = { + .name = DRV_NAME, + .probe = liteeth_probe, + .of_compatible = DRV_OF_COMPAT(liteeth_dt_ids), +}; +device_platform_driver(liteeth_driver); + +MODULE_AUTHOR("Joel Stanley "); +MODULE_LICENSE("GPL"); -- 2.32.0 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox