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-rw-r--r--target/linux/lantiq/patches-2.6.32/0011-MIPS-Lantiq-Add-ethernet-driver.patch943
1 files changed, 943 insertions, 0 deletions
diff --git a/target/linux/lantiq/patches-2.6.32/0011-MIPS-Lantiq-Add-ethernet-driver.patch b/target/linux/lantiq/patches-2.6.32/0011-MIPS-Lantiq-Add-ethernet-driver.patch
new file mode 100644
index 0000000000..0d869de9a8
--- /dev/null
+++ b/target/linux/lantiq/patches-2.6.32/0011-MIPS-Lantiq-Add-ethernet-driver.patch
@@ -0,0 +1,943 @@
+From 435de86088af82496bcba69165cd7422bb4622ec Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Fri, 6 May 2011 00:10:01 +0200
+Subject: [PATCH 11/13] MIPS: Lantiq: Add ethernet driver
+
+This patch adds the driver for the ETOP Packet Processing Engine (PPE32)
+found inside the XWAY family of Lantiq MIPS SoCs. This driver makes 100MBit
+ethernet work. Support for all 8 dma channels, gbit and the embedded switch
+found on the ar9/vr9 still needs to be implemented.
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+Signed-off-by: Ralph Hempel <ralph.hempel@lantiq.com>
+Cc: linux-mips@linux-mips.org
+Cc: netdev@vger.kernel.org
+Patchwork: https://patchwork.linux-mips.org/patch/2357/
+Acked-by: David S. Miller <davem@davemloft.net>
+Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
+---
+ .../mips/include/asm/mach-lantiq/lantiq_platform.h | 7 +
+ .../mips/include/asm/mach-lantiq/xway/lantiq_soc.h | 4 +-
+ arch/mips/lantiq/xway/devices.c | 23 +
+ arch/mips/lantiq/xway/devices.h | 1 +
+ drivers/net/Kconfig | 7 +
+ drivers/net/Makefile | 1 +
+ drivers/net/lantiq_etop.c | 805 ++++++++++++++++++++
+ 7 files changed, 846 insertions(+), 2 deletions(-)
+ create mode 100644 drivers/net/lantiq_etop.c
+
+--- a/arch/mips/include/asm/mach-lantiq/lantiq_platform.h
++++ b/arch/mips/include/asm/mach-lantiq/lantiq_platform.h
+@@ -10,6 +10,7 @@
+ #define _LANTIQ_PLATFORM_H__
+
+ #include <linux/mtd/partitions.h>
++#include <linux/socket.h>
+
+ /* struct used to pass info to the pci core */
+ enum {
+@@ -43,4 +44,10 @@
+ int irq[16];
+ };
+
++/* struct used to pass info to network drivers */
++struct ltq_eth_data {
++ struct sockaddr mac;
++ int mii_mode;
++};
++
+ #endif
+--- a/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
++++ b/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
+@@ -82,8 +82,8 @@
+ #define PMU_SWITCH 0x10000000
+
+ /* ETOP - ethernet */
+-#define LTQ_PPE32_BASE_ADDR 0xBE180000
+-#define LTQ_PPE32_SIZE 0x40000
++#define LTQ_ETOP_BASE_ADDR 0x1E180000
++#define LTQ_ETOP_SIZE 0x40000
+
+ /* DMA */
+ #define LTQ_DMA_BASE_ADDR 0x1E104100
+--- a/arch/mips/lantiq/xway/devices.c
++++ b/arch/mips/lantiq/xway/devices.c
+@@ -96,3 +96,26 @@
+ platform_device_register_simple("ltq_asc", 0,
+ ltq_ase_asc_resources, ARRAY_SIZE(ltq_ase_asc_resources));
+ }
++
++/* ethernet */
++static struct resource ltq_etop_resources = {
++ .name = "etop",
++ .start = LTQ_ETOP_BASE_ADDR,
++ .end = LTQ_ETOP_BASE_ADDR + LTQ_ETOP_SIZE - 1,
++ .flags = IORESOURCE_MEM,
++};
++
++static struct platform_device ltq_etop = {
++ .name = "ltq_etop",
++ .resource = &ltq_etop_resources,
++ .num_resources = 1,
++};
++
++void __init
++ltq_register_etop(struct ltq_eth_data *eth)
++{
++ if (eth) {
++ ltq_etop.dev.platform_data = eth;
++ platform_device_register(&ltq_etop);
++ }
++}
+--- a/arch/mips/lantiq/xway/devices.h
++++ b/arch/mips/lantiq/xway/devices.h
+@@ -15,5 +15,6 @@
+ extern void ltq_register_gpio(void);
+ extern void ltq_register_gpio_stp(void);
+ extern void ltq_register_ase_asc(void);
++extern void ltq_register_etop(struct ltq_eth_data *eth);
+
+ #endif
+--- a/drivers/net/Kconfig
++++ b/drivers/net/Kconfig
+@@ -1951,6 +1951,13 @@
+ This driver supports the ethernet MACs in the Broadcom 63xx
+ MIPS chipset family (BCM63XX).
+
++config LANTIQ_ETOP
++ tristate "Lantiq SoC ETOP driver"
++ depends on SOC_TYPE_XWAY
++ help
++ Support for the MII0 inside the Lantiq SoC
++
++
+ source "drivers/net/fs_enet/Kconfig"
+
+ endif # NET_ETHERNET
+--- a/drivers/net/Makefile
++++ b/drivers/net/Makefile
+@@ -246,6 +246,7 @@
+ obj-$(CONFIG_MLX4_CORE) += mlx4/
+ obj-$(CONFIG_ENC28J60) += enc28j60.o
+ obj-$(CONFIG_ETHOC) += ethoc.o
++obj-$(CONFIG_LANTIQ_ETOP) += lantiq_etop.o
+
+ obj-$(CONFIG_XTENSA_XT2000_SONIC) += xtsonic.o
+
+--- /dev/null
++++ b/drivers/net/lantiq_etop.c
+@@ -0,0 +1,814 @@
++/*
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License version 2 as published
++ * by the Free Software Foundation.
++ *
++ * This program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; if not, write to the Free Software
++ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
++ *
++ * Copyright (C) 2011 John Crispin <blogic@openwrt.org>
++ */
++
++#include <linux/kernel.h>
++#include <linux/slab.h>
++#include <linux/errno.h>
++#include <linux/types.h>
++#include <linux/interrupt.h>
++#include <linux/uaccess.h>
++#include <linux/in.h>
++#include <linux/netdevice.h>
++#include <linux/etherdevice.h>
++#include <linux/phy.h>
++#include <linux/ip.h>
++#include <linux/tcp.h>
++#include <linux/skbuff.h>
++#include <linux/mm.h>
++#include <linux/platform_device.h>
++#include <linux/ethtool.h>
++#include <linux/init.h>
++#include <linux/delay.h>
++#include <linux/io.h>
++
++#include <asm/checksum.h>
++
++#include <lantiq_soc.h>
++#include <xway_dma.h>
++#include <lantiq_platform.h>
++
++#define LTQ_ETOP_MDIO 0x11804
++#define MDIO_REQUEST 0x80000000
++#define MDIO_READ 0x40000000
++#define MDIO_ADDR_MASK 0x1f
++#define MDIO_ADDR_OFFSET 0x15
++#define MDIO_REG_MASK 0x1f
++#define MDIO_REG_OFFSET 0x10
++#define MDIO_VAL_MASK 0xffff
++
++#define PPE32_CGEN 0x800
++#define LTQ_PPE32_ENET_MAC_CFG 0x1840
++
++#define LTQ_ETOP_ENETS0 0x11850
++#define LTQ_ETOP_MAC_DA0 0x1186C
++#define LTQ_ETOP_MAC_DA1 0x11870
++#define LTQ_ETOP_CFG 0x16020
++#define LTQ_ETOP_IGPLEN 0x16080
++
++#define MAX_DMA_CHAN 0x8
++#define MAX_DMA_CRC_LEN 0x4
++#define MAX_DMA_DATA_LEN 0x600
++
++#define ETOP_FTCU BIT(28)
++#define ETOP_MII_MASK 0xf
++#define ETOP_MII_NORMAL 0xd
++#define ETOP_MII_REVERSE 0xe
++#define ETOP_PLEN_UNDER 0x40
++#define ETOP_CGEN 0x800
++
++/* use 2 static channels for TX/RX */
++#define LTQ_ETOP_TX_CHANNEL 1
++#define LTQ_ETOP_RX_CHANNEL 6
++#define IS_TX(x) (x == LTQ_ETOP_TX_CHANNEL)
++#define IS_RX(x) (x == LTQ_ETOP_RX_CHANNEL)
++
++#define ltq_etop_r32(x) ltq_r32(ltq_etop_membase + (x))
++#define ltq_etop_w32(x, y) ltq_w32(x, ltq_etop_membase + (y))
++#define ltq_etop_w32_mask(x, y, z) \
++ ltq_w32_mask(x, y, ltq_etop_membase + (z))
++
++#define DRV_VERSION "1.0"
++
++#ifndef netdev_err
++#define netdev_err(a, b, ...) printk(b, ##__VA_ARGS__)
++#endif
++
++#ifndef pr_warn
++#define pr_warn pr_warning
++#endif
++
++static void __iomem *ltq_etop_membase;
++
++struct ltq_etop_chan {
++ int idx;
++ int tx_free;
++ struct net_device *netdev;
++ struct napi_struct napi;
++ struct ltq_dma_channel dma;
++ struct sk_buff *skb[LTQ_DESC_NUM];
++};
++
++struct ltq_etop_priv {
++ struct net_device *netdev;
++ struct ltq_eth_data *pldata;
++ struct resource *res;
++
++ struct mii_bus *mii_bus;
++ struct phy_device *phydev;
++
++ struct ltq_etop_chan ch[MAX_DMA_CHAN];
++ int tx_free[MAX_DMA_CHAN >> 1];
++
++ spinlock_t lock;
++};
++
++static int
++ltq_etop_alloc_skb(struct ltq_etop_chan *ch)
++{
++ ch->skb[ch->dma.desc] = dev_alloc_skb(MAX_DMA_DATA_LEN);
++ if (!ch->skb[ch->dma.desc])
++ return -ENOMEM;
++ ch->dma.desc_base[ch->dma.desc].addr = dma_map_single(NULL,
++ ch->skb[ch->dma.desc]->data, MAX_DMA_DATA_LEN,
++ DMA_FROM_DEVICE);
++ ch->dma.desc_base[ch->dma.desc].addr =
++ CPHYSADDR(ch->skb[ch->dma.desc]->data);
++ ch->dma.desc_base[ch->dma.desc].ctl =
++ LTQ_DMA_OWN | LTQ_DMA_RX_OFFSET(NET_IP_ALIGN) |
++ MAX_DMA_DATA_LEN;
++ skb_reserve(ch->skb[ch->dma.desc], NET_IP_ALIGN);
++ return 0;
++}
++
++static void
++ltq_etop_hw_receive(struct ltq_etop_chan *ch)
++{
++ struct ltq_etop_priv *priv = netdev_priv(ch->netdev);
++ struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc];
++ struct sk_buff *skb = ch->skb[ch->dma.desc];
++ int len = (desc->ctl & LTQ_DMA_SIZE_MASK) - MAX_DMA_CRC_LEN;
++ unsigned long flags;
++
++ spin_lock_irqsave(&priv->lock, flags);
++ if (ltq_etop_alloc_skb(ch)) {
++ netdev_err(ch->netdev,
++ "failed to allocate new rx buffer, stopping DMA\n");
++ ltq_dma_close(&ch->dma);
++ }
++ ch->dma.desc++;
++ ch->dma.desc %= LTQ_DESC_NUM;
++ spin_unlock_irqrestore(&priv->lock, flags);
++
++ skb_put(skb, len);
++ skb->dev = ch->netdev;
++ skb->protocol = eth_type_trans(skb, ch->netdev);
++ netif_receive_skb(skb);
++}
++
++static int
++ltq_etop_poll_rx(struct napi_struct *napi, int budget)
++{
++ struct ltq_etop_chan *ch = container_of(napi,
++ struct ltq_etop_chan, napi);
++ int rx = 0;
++ int complete = 0;
++
++ while ((rx < budget) && !complete) {
++ struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc];
++
++ if ((desc->ctl & (LTQ_DMA_OWN | LTQ_DMA_C)) == LTQ_DMA_C) {
++ ltq_etop_hw_receive(ch);
++ rx++;
++ } else {
++ complete = 1;
++ }
++ }
++ if (complete || !rx) {
++ napi_complete(&ch->napi);
++ ltq_dma_ack_irq(&ch->dma);
++ }
++ return rx;
++}
++
++static int
++ltq_etop_poll_tx(struct napi_struct *napi, int budget)
++{
++ struct ltq_etop_chan *ch =
++ container_of(napi, struct ltq_etop_chan, napi);
++ struct ltq_etop_priv *priv = netdev_priv(ch->netdev);
++ struct netdev_queue *txq =
++ netdev_get_tx_queue(ch->netdev, ch->idx >> 1);
++ unsigned long flags;
++
++ spin_lock_irqsave(&priv->lock, flags);
++ while ((ch->dma.desc_base[ch->tx_free].ctl &
++ (LTQ_DMA_OWN | LTQ_DMA_C)) == LTQ_DMA_C) {
++ dev_kfree_skb_any(ch->skb[ch->tx_free]);
++ ch->skb[ch->tx_free] = NULL;
++ memset(&ch->dma.desc_base[ch->tx_free], 0,
++ sizeof(struct ltq_dma_desc));
++ ch->tx_free++;
++ ch->tx_free %= LTQ_DESC_NUM;
++ }
++ spin_unlock_irqrestore(&priv->lock, flags);
++
++ if (netif_tx_queue_stopped(txq))
++ netif_tx_start_queue(txq);
++ napi_complete(&ch->napi);
++ ltq_dma_ack_irq(&ch->dma);
++ return 1;
++}
++
++static irqreturn_t
++ltq_etop_dma_irq(int irq, void *_priv)
++{
++ struct ltq_etop_priv *priv = _priv;
++ int ch = irq - LTQ_DMA_CH0_INT;
++
++ napi_schedule(&priv->ch[ch].napi);
++ return IRQ_HANDLED;
++}
++
++static void
++ltq_etop_free_channel(struct net_device *dev, struct ltq_etop_chan *ch)
++{
++ struct ltq_etop_priv *priv = netdev_priv(dev);
++
++ ltq_dma_free(&ch->dma);
++ if (ch->dma.irq)
++ free_irq(ch->dma.irq, priv);
++ if (IS_RX(ch->idx)) {
++ int desc;
++ for (desc = 0; desc < LTQ_DESC_NUM; desc++)
++ dev_kfree_skb_any(ch->skb[ch->dma.desc]);
++ }
++}
++
++static void
++ltq_etop_hw_exit(struct net_device *dev)
++{
++ struct ltq_etop_priv *priv = netdev_priv(dev);
++ int i;
++
++ ltq_pmu_disable(PMU_PPE);
++ for (i = 0; i < MAX_DMA_CHAN; i++)
++ if (IS_TX(i) || IS_RX(i))
++ ltq_etop_free_channel(dev, &priv->ch[i]);
++}
++
++static int
++ltq_etop_hw_init(struct net_device *dev)
++{
++ struct ltq_etop_priv *priv = netdev_priv(dev);
++ int i;
++
++ ltq_pmu_enable(PMU_PPE);
++
++ switch (priv->pldata->mii_mode) {
++ case PHY_INTERFACE_MODE_RMII:
++ ltq_etop_w32_mask(ETOP_MII_MASK,
++ ETOP_MII_REVERSE, LTQ_ETOP_CFG);
++ break;
++
++ case PHY_INTERFACE_MODE_MII:
++ ltq_etop_w32_mask(ETOP_MII_MASK,
++ ETOP_MII_NORMAL, LTQ_ETOP_CFG);
++ break;
++
++ default:
++ netdev_err(dev, "unknown mii mode %d\n",
++ priv->pldata->mii_mode);
++ return -ENOTSUPP;
++ }
++
++ /* enable crc generation */
++ ltq_etop_w32(PPE32_CGEN, LTQ_PPE32_ENET_MAC_CFG);
++
++ ltq_dma_init_port(DMA_PORT_ETOP);
++
++ for (i = 0; i < MAX_DMA_CHAN; i++) {
++ int irq = LTQ_DMA_CH0_INT + i;
++ struct ltq_etop_chan *ch = &priv->ch[i];
++
++ ch->idx = ch->dma.nr = i;
++
++ if (IS_TX(i)) {
++ ltq_dma_alloc_tx(&ch->dma);
++ request_irq(irq, ltq_etop_dma_irq, IRQF_DISABLED,
++ "etop_tx", priv);
++ } else if (IS_RX(i)) {
++ ltq_dma_alloc_rx(&ch->dma);
++ for (ch->dma.desc = 0; ch->dma.desc < LTQ_DESC_NUM;
++ ch->dma.desc++)
++ if (ltq_etop_alloc_skb(ch))
++ return -ENOMEM;
++ ch->dma.desc = 0;
++ request_irq(irq, ltq_etop_dma_irq, IRQF_DISABLED,
++ "etop_rx", priv);
++ }
++ ch->dma.irq = irq;
++ }
++ return 0;
++}
++
++static void
++ltq_etop_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
++{
++ strcpy(info->driver, "Lantiq ETOP");
++ strcpy(info->bus_info, "internal");
++ strcpy(info->version, DRV_VERSION);
++}
++
++static int
++ltq_etop_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
++{
++ struct ltq_etop_priv *priv = netdev_priv(dev);
++
++ return phy_ethtool_gset(priv->phydev, cmd);
++}
++
++static int
++ltq_etop_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
++{
++ struct ltq_etop_priv *priv = netdev_priv(dev);
++
++ return phy_ethtool_sset(priv->phydev, cmd);
++}
++
++static int
++ltq_etop_nway_reset(struct net_device *dev)
++{
++ struct ltq_etop_priv *priv = netdev_priv(dev);
++
++ return phy_start_aneg(priv->phydev);
++}
++
++static const struct ethtool_ops ltq_etop_ethtool_ops = {
++ .get_drvinfo = ltq_etop_get_drvinfo,
++ .get_settings = ltq_etop_get_settings,
++ .set_settings = ltq_etop_set_settings,
++ .nway_reset = ltq_etop_nway_reset,
++};
++
++static int
++ltq_etop_mdio_wr(struct mii_bus *bus, int phy_addr, int phy_reg, u16 phy_data)
++{
++ u32 val = MDIO_REQUEST |
++ ((phy_addr & MDIO_ADDR_MASK) << MDIO_ADDR_OFFSET) |
++ ((phy_reg & MDIO_REG_MASK) << MDIO_REG_OFFSET) |
++ phy_data;
++
++ while (ltq_etop_r32(LTQ_ETOP_MDIO) & MDIO_REQUEST)
++ ;
++ ltq_etop_w32(val, LTQ_ETOP_MDIO);
++ return 0;
++}
++
++static int
++ltq_etop_mdio_rd(struct mii_bus *bus, int phy_addr, int phy_reg)
++{
++ u32 val = MDIO_REQUEST | MDIO_READ |
++ ((phy_addr & MDIO_ADDR_MASK) << MDIO_ADDR_OFFSET) |
++ ((phy_reg & MDIO_REG_MASK) << MDIO_REG_OFFSET);
++
++ while (ltq_etop_r32(LTQ_ETOP_MDIO) & MDIO_REQUEST)
++ ;
++ ltq_etop_w32(val, LTQ_ETOP_MDIO);
++ while (ltq_etop_r32(LTQ_ETOP_MDIO) & MDIO_REQUEST)
++ ;
++ val = ltq_etop_r32(LTQ_ETOP_MDIO) & MDIO_VAL_MASK;
++ return val;
++}
++
++static void
++ltq_etop_mdio_link(struct net_device *dev)
++{
++ /* nothing to do */
++}
++
++static int
++ltq_etop_mdio_probe(struct net_device *dev)
++{
++ struct ltq_etop_priv *priv = netdev_priv(dev);
++ struct phy_device *phydev = NULL;
++ int phy_addr;
++
++ for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
++ if (priv->mii_bus->phy_map[phy_addr]) {
++ phydev = priv->mii_bus->phy_map[phy_addr];
++ break;
++ }
++ }
++
++ if (!phydev) {
++ netdev_err(dev, "no PHY found\n");
++ return -ENODEV;
++ }
++
++ phydev = phy_connect(dev, dev_name(&phydev->dev), &ltq_etop_mdio_link,
++ 0, priv->pldata->mii_mode);
++
++ if (IS_ERR(phydev)) {
++ netdev_err(dev, "Could not attach to PHY\n");
++ return PTR_ERR(phydev);
++ }
++
++ phydev->supported &= (SUPPORTED_10baseT_Half
++ | SUPPORTED_10baseT_Full
++ | SUPPORTED_100baseT_Half
++ | SUPPORTED_100baseT_Full
++ | SUPPORTED_Autoneg
++ | SUPPORTED_MII
++ | SUPPORTED_TP);
++
++ phydev->advertising = phydev->supported;
++ priv->phydev = phydev;
++ pr_info("%s: attached PHY [%s] (phy_addr=%s, irq=%d)\n",
++ dev->name, phydev->drv->name,
++ dev_name(&phydev->dev), phydev->irq);
++
++ return 0;
++}
++
++static int
++ltq_etop_mdio_init(struct net_device *dev)
++{
++ struct ltq_etop_priv *priv = netdev_priv(dev);
++ int i;
++ int err;
++
++ priv->mii_bus = mdiobus_alloc();
++ if (!priv->mii_bus) {
++ netdev_err(dev, "failed to allocate mii bus\n");
++ err = -ENOMEM;
++ goto err_out;
++ }
++
++ priv->mii_bus->priv = dev;
++ priv->mii_bus->read = ltq_etop_mdio_rd;
++ priv->mii_bus->write = ltq_etop_mdio_wr;
++ priv->mii_bus->name = "ltq_mii";
++ snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "%x", 0);
++ priv->mii_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
++ if (!priv->mii_bus->irq) {
++ err = -ENOMEM;
++ goto err_out_free_mdiobus;
++ }
++
++ for (i = 0; i < PHY_MAX_ADDR; ++i)
++ priv->mii_bus->irq[i] = PHY_POLL;
++
++ if (mdiobus_register(priv->mii_bus)) {
++ err = -ENXIO;
++ goto err_out_free_mdio_irq;
++ }
++
++ if (ltq_etop_mdio_probe(dev)) {
++ err = -ENXIO;
++ goto err_out_unregister_bus;
++ }
++ return 0;
++
++err_out_unregister_bus:
++ mdiobus_unregister(priv->mii_bus);
++err_out_free_mdio_irq:
++ kfree(priv->mii_bus->irq);
++err_out_free_mdiobus:
++ mdiobus_free(priv->mii_bus);
++err_out:
++ return err;
++}
++
++static void
++ltq_etop_mdio_cleanup(struct net_device *dev)
++{
++ struct ltq_etop_priv *priv = netdev_priv(dev);
++
++ phy_disconnect(priv->phydev);
++ mdiobus_unregister(priv->mii_bus);
++ kfree(priv->mii_bus->irq);
++ mdiobus_free(priv->mii_bus);
++}
++
++static int
++ltq_etop_open(struct net_device *dev)
++{
++ struct ltq_etop_priv *priv = netdev_priv(dev);
++ int i;
++
++ for (i = 0; i < MAX_DMA_CHAN; i++) {
++ struct ltq_etop_chan *ch = &priv->ch[i];
++
++ if (!IS_TX(i) && (!IS_RX(i)))
++ continue;
++ ltq_dma_open(&ch->dma);
++ napi_enable(&ch->napi);
++ }
++ phy_start(priv->phydev);
++ netif_tx_start_all_queues(dev);
++ return 0;
++}
++
++static int
++ltq_etop_stop(struct net_device *dev)
++{
++ struct ltq_etop_priv *priv = netdev_priv(dev);
++ int i;
++
++ netif_tx_stop_all_queues(dev);
++ phy_stop(priv->phydev);
++ for (i = 0; i < MAX_DMA_CHAN; i++) {
++ struct ltq_etop_chan *ch = &priv->ch[i];
++
++ if (!IS_RX(i) && !IS_TX(i))
++ continue;
++ napi_disable(&ch->napi);
++ ltq_dma_close(&ch->dma);
++ }
++ return 0;
++}
++
++static int
++ltq_etop_tx(struct sk_buff *skb, struct net_device *dev)
++{
++ int queue = skb_get_queue_mapping(skb);
++ struct netdev_queue *txq = netdev_get_tx_queue(dev, queue);
++ struct ltq_etop_priv *priv = netdev_priv(dev);
++ struct ltq_etop_chan *ch = &priv->ch[(queue << 1) | 1];
++ struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc];
++ int len;
++ unsigned long flags;
++ u32 byte_offset;
++
++ len = skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len;
++
++ if ((desc->ctl & (LTQ_DMA_OWN | LTQ_DMA_C)) || ch->skb[ch->dma.desc]) {
++ dev_kfree_skb_any(skb);
++ netdev_err(dev, "tx ring full\n");
++ netif_tx_stop_queue(txq);
++ return NETDEV_TX_BUSY;
++ }
++
++ /* dma needs to start on a 16 byte aligned address */
++ byte_offset = CPHYSADDR(skb->data) % 16;
++ ch->skb[ch->dma.desc] = skb;
++
++ dev->trans_start = jiffies;
++
++ spin_lock_irqsave(&priv->lock, flags);
++ desc->addr = ((unsigned int) dma_map_single(NULL, skb->data, len,
++ DMA_TO_DEVICE)) - byte_offset;
++ wmb();
++ desc->ctl = LTQ_DMA_OWN | LTQ_DMA_SOP | LTQ_DMA_EOP |
++ LTQ_DMA_TX_OFFSET(byte_offset) | (len & LTQ_DMA_SIZE_MASK);
++ ch->dma.desc++;
++ ch->dma.desc %= LTQ_DESC_NUM;
++ spin_unlock_irqrestore(&priv->lock, flags);
++
++ if (ch->dma.desc_base[ch->dma.desc].ctl & LTQ_DMA_OWN)
++ netif_tx_stop_queue(txq);
++
++ return NETDEV_TX_OK;
++}
++
++static int
++ltq_etop_change_mtu(struct net_device *dev, int new_mtu)
++{
++ int ret = eth_change_mtu(dev, new_mtu);
++
++ if (!ret) {
++ struct ltq_etop_priv *priv = netdev_priv(dev);
++ unsigned long flags;
++
++ spin_lock_irqsave(&priv->lock, flags);
++ ltq_etop_w32((ETOP_PLEN_UNDER << 16) | new_mtu,
++ LTQ_ETOP_IGPLEN);
++ spin_unlock_irqrestore(&priv->lock, flags);
++ }
++ return ret;
++}
++
++static int
++ltq_etop_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
++{
++ struct ltq_etop_priv *priv = netdev_priv(dev);
++ struct mii_ioctl_data *data = if_mii(rq);
++
++ /* TODO: mii-toll reports "No MII transceiver present!." ?!*/
++ return phy_mii_ioctl(priv->phydev, data, cmd);
++}
++
++static int
++ltq_etop_set_mac_address(struct net_device *dev, void *p)
++{
++ int ret = eth_mac_addr(dev, p);
++
++ if (!ret) {
++ struct ltq_etop_priv *priv = netdev_priv(dev);
++ unsigned long flags;
++
++ /* store the mac for the unicast filter */
++ spin_lock_irqsave(&priv->lock, flags);
++ ltq_etop_w32(*((u32 *)dev->dev_addr), LTQ_ETOP_MAC_DA0);
++ ltq_etop_w32(*((u16 *)&dev->dev_addr[4]) << 16,
++ LTQ_ETOP_MAC_DA1);
++ spin_unlock_irqrestore(&priv->lock, flags);
++ }
++ return ret;
++}
++
++static void
++ltq_etop_set_multicast_list(struct net_device *dev)
++{
++ struct ltq_etop_priv *priv = netdev_priv(dev);
++ unsigned long flags;
++
++ /* ensure that the unicast filter is not enabled in promiscious mode */
++ spin_lock_irqsave(&priv->lock, flags);
++ if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI))
++ ltq_etop_w32_mask(ETOP_FTCU, 0, LTQ_ETOP_ENETS0);
++ else
++ ltq_etop_w32_mask(0, ETOP_FTCU, LTQ_ETOP_ENETS0);
++ spin_unlock_irqrestore(&priv->lock, flags);
++}
++
++static u16
++ltq_etop_select_queue(struct net_device *dev, struct sk_buff *skb)
++{
++ /* we are currently only using the first queue */
++ return 0;
++}
++
++static int
++ltq_etop_init(struct net_device *dev)
++{
++ struct ltq_etop_priv *priv = netdev_priv(dev);
++ struct sockaddr mac;
++ int err;
++
++ ether_setup(dev);
++ dev->watchdog_timeo = 10 * HZ;
++ err = ltq_etop_hw_init(dev);
++ if (err)
++ goto err_hw;
++ ltq_etop_change_mtu(dev, 1500);
++
++ memcpy(&mac, &priv->pldata->mac, sizeof(struct sockaddr));
++ if (!is_valid_ether_addr(mac.sa_data)) {
++ pr_warn("etop: invalid MAC, using random\n");
++ random_ether_addr(mac.sa_data);
++ }
++
++ err = ltq_etop_set_mac_address(dev, &mac);
++ if (err)
++ goto err_netdev;
++ ltq_etop_set_multicast_list(dev);
++ err = ltq_etop_mdio_init(dev);
++ if (err)
++ goto err_netdev;
++ return 0;
++
++err_netdev:
++ unregister_netdev(dev);
++ free_netdev(dev);
++err_hw:
++ ltq_etop_hw_exit(dev);
++ return err;
++}
++
++static void
++ltq_etop_tx_timeout(struct net_device *dev)
++{
++ int err;
++
++ ltq_etop_hw_exit(dev);
++ err = ltq_etop_hw_init(dev);
++ if (err)
++ goto err_hw;
++ dev->trans_start = jiffies;
++ netif_wake_queue(dev);
++ return;
++
++err_hw:
++ ltq_etop_hw_exit(dev);
++ netdev_err(dev, "failed to restart etop after TX timeout\n");
++}
++
++static const struct net_device_ops ltq_eth_netdev_ops = {
++ .ndo_open = ltq_etop_open,
++ .ndo_stop = ltq_etop_stop,
++ .ndo_start_xmit = ltq_etop_tx,
++ .ndo_change_mtu = ltq_etop_change_mtu,
++ .ndo_do_ioctl = ltq_etop_ioctl,
++ .ndo_set_mac_address = ltq_etop_set_mac_address,
++ .ndo_validate_addr = eth_validate_addr,
++ .ndo_set_multicast_list = ltq_etop_set_multicast_list,
++ .ndo_select_queue = ltq_etop_select_queue,
++ .ndo_init = ltq_etop_init,
++ .ndo_tx_timeout = ltq_etop_tx_timeout,
++};
++
++static int __init
++ltq_etop_probe(struct platform_device *pdev)
++{
++ struct net_device *dev;
++ struct ltq_etop_priv *priv;
++ struct resource *res;
++ int err;
++ int i;
++
++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++ if (!res) {
++ dev_err(&pdev->dev, "failed to get etop resource\n");
++ err = -ENOENT;
++ goto err_out;
++ }
++
++ res = devm_request_mem_region(&pdev->dev, res->start,
++ resource_size(res), dev_name(&pdev->dev));
++ if (!res) {
++ dev_err(&pdev->dev, "failed to request etop resource\n");
++ err = -EBUSY;
++ goto err_out;
++ }
++
++ ltq_etop_membase = devm_ioremap_nocache(&pdev->dev,
++ res->start, resource_size(res));
++ if (!ltq_etop_membase) {
++ dev_err(&pdev->dev, "failed to remap etop engine %d\n",
++ pdev->id);
++ err = -ENOMEM;
++ goto err_out;
++ }
++
++ dev = alloc_etherdev_mq(sizeof(struct ltq_etop_priv), 4);
++ strcpy(dev->name, "eth%d");
++ dev->netdev_ops = &ltq_eth_netdev_ops;
++ dev->ethtool_ops = &ltq_etop_ethtool_ops;
++ priv = netdev_priv(dev);
++ priv->res = res;
++ priv->pldata = dev_get_platdata(&pdev->dev);
++ priv->netdev = dev;
++ spin_lock_init(&priv->lock);
++
++ for (i = 0; i < MAX_DMA_CHAN; i++) {
++ if (IS_TX(i))
++ netif_napi_add(dev, &priv->ch[i].napi,
++ ltq_etop_poll_tx, 8);
++ else if (IS_RX(i))
++ netif_napi_add(dev, &priv->ch[i].napi,
++ ltq_etop_poll_rx, 32);
++ priv->ch[i].netdev = dev;
++ }
++
++ err = register_netdev(dev);
++ if (err)
++ goto err_free;
++
++ platform_set_drvdata(pdev, dev);
++ return 0;
++
++err_free:
++ kfree(dev);
++err_out:
++ return err;
++}
++
++static int __devexit
++ltq_etop_remove(struct platform_device *pdev)
++{
++ struct net_device *dev = platform_get_drvdata(pdev);
++
++ if (dev) {
++ netif_tx_stop_all_queues(dev);
++ ltq_etop_hw_exit(dev);
++ ltq_etop_mdio_cleanup(dev);
++ unregister_netdev(dev);
++ }
++ return 0;
++}
++
++static struct platform_driver ltq_mii_driver = {
++ .remove = __devexit_p(ltq_etop_remove),
++ .driver = {
++ .name = "ltq_etop",
++ .owner = THIS_MODULE,
++ },
++};
++
++int __init
++init_ltq_etop(void)
++{
++ int ret = platform_driver_probe(&ltq_mii_driver, ltq_etop_probe);
++
++ if (ret)
++ pr_err("ltq_etop: Error registering platfom driver!");
++ return ret;
++}
++
++static void __exit
++exit_ltq_etop(void)
++{
++ platform_driver_unregister(&ltq_mii_driver);
++}
++
++module_init(init_ltq_etop);
++module_exit(exit_ltq_etop);
++
++MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
++MODULE_DESCRIPTION("Lantiq SoC ETOP");
++MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-07 04:53:23 +0000