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ee4c47a134
openwrt/target/linux/lantiq/patches-3.2/0042-NET-adds-driver-for-lantiq-vr9-ethernet.patch
Jonas Gorski ee4c47a134 kernel: update linux 3.2 to 3.2.15 
SVN-Revision: 31335
2012-04-17 12:50:54 +00:00

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From 29be0a0cb78942568ea4dc164a86da1bcf7b3ad6 Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Fri, 9 Mar 2012 19:03:40 +0100
Subject: [PATCH 42/73] NET: adds driver for lantiq vr9 ethernet
---
.../mips/include/asm/mach-lantiq/xway/lantiq_soc.h | 2 +-
arch/mips/lantiq/xway/devices.c | 20 +
arch/mips/lantiq/xway/devices.h | 1 +
drivers/net/ethernet/Kconfig | 6 +
drivers/net/ethernet/Makefile | 1 +
drivers/net/ethernet/lantiq_vrx200.c | 1358 ++++++++++++++++++++
6 files changed, 1387 insertions(+), 1 deletions(-)
create mode 100644 drivers/net/ethernet/lantiq_vrx200.c
--- a/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
+++ b/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
@@ -102,7 +102,7 @@
/* GBIT - gigabit switch */
#define LTQ_GBIT_BASE_ADDR 0x1E108000
-#define LTQ_GBIT_SIZE 0x200
+#define LTQ_GBIT_SIZE 0x4000
/* DMA */
#define LTQ_DMA_BASE_ADDR 0x1E104100
--- a/arch/mips/lantiq/xway/devices.c
+++ b/arch/mips/lantiq/xway/devices.c
@@ -83,6 +83,7 @@ static struct platform_device ltq_etop =
.name = "ltq_etop",
.resource = ltq_etop_resources,
.num_resources = 1,
+ .id = -1,
};
void __init
@@ -96,3 +97,22 @@ ltq_register_etop(struct ltq_eth_data *e
platform_device_register(&ltq_etop);
}
}
+
+/* ethernet */
+static struct resource ltq_vrx200_resources[] = {
+ MEM_RES("gbit", LTQ_GBIT_BASE_ADDR, LTQ_GBIT_SIZE),
+};
+
+static struct platform_device ltq_vrx200 = {
+ .name = "ltq_vrx200",
+ .resource = ltq_vrx200_resources,
+ .num_resources = 1,
+ .id = -1,
+};
+
+void __init
+ltq_register_vrx200(struct ltq_eth_data *eth)
+{
+ ltq_vrx200.dev.platform_data = eth;
+ platform_device_register(&ltq_vrx200);
+}
--- a/arch/mips/lantiq/xway/devices.h
+++ b/arch/mips/lantiq/xway/devices.h
@@ -17,5 +17,6 @@ extern void ltq_register_gpio_stp(void);
extern void ltq_register_ase_asc(void);
extern void ltq_register_etop(struct ltq_eth_data *eth);
extern void xway_register_nand(struct mtd_partition *parts, int count);
+extern void ltq_register_vrx200(struct ltq_eth_data *eth);
#endif
--- a/drivers/net/ethernet/Kconfig
+++ b/drivers/net/ethernet/Kconfig
@@ -84,6 +84,12 @@ config LANTIQ_ETOP
---help---
Support for the MII0 inside the Lantiq SoC
+config LANTIQ_VRX200
+ tristate "Lantiq SoC vrx200 driver"
+ depends on SOC_TYPE_XWAY
+ ---help---
+ Support for the MII0 inside the Lantiq SoC
+
source "drivers/net/ethernet/marvell/Kconfig"
source "drivers/net/ethernet/mellanox/Kconfig"
source "drivers/net/ethernet/micrel/Kconfig"
--- a/drivers/net/ethernet/Makefile
+++ b/drivers/net/ethernet/Makefile
@@ -35,6 +35,7 @@ obj-$(CONFIG_IP1000) += icplus/
obj-$(CONFIG_JME) += jme.o
obj-$(CONFIG_KORINA) += korina.o
obj-$(CONFIG_LANTIQ_ETOP) += lantiq_etop.o
+obj-$(CONFIG_LANTIQ_VRX200) += lantiq_vrx200.o
obj-$(CONFIG_NET_VENDOR_MARVELL) += marvell/
obj-$(CONFIG_NET_VENDOR_MELLANOX) += mellanox/
obj-$(CONFIG_NET_VENDOR_MICREL) += micrel/
--- /dev/null
+++ b/drivers/net/ethernet/lantiq_vrx200.c
@@ -0,0 +1,1358 @@
+/*
+ * 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 <linux/dma-mapping.h>
+#include <linux/module.h>
+#include <linux/clk.h>
+
+#include <asm/checksum.h>
+
+#include <lantiq_soc.h>
+#include <xway_dma.h>
+#include <lantiq_platform.h>
+
+#define LTQ_SWITCH_BASE 0x1E108000
+#define LTQ_SWITCH_CORE_BASE LTQ_SWITCH_BASE
+#define LTQ_SWITCH_TOP_PDI_BASE LTQ_SWITCH_CORE_BASE
+#define LTQ_SWITCH_BM_PDI_BASE (LTQ_SWITCH_CORE_BASE + 4 * 0x40)
+#define LTQ_SWITCH_MAC_PDI_0_BASE (LTQ_SWITCH_CORE_BASE + 4 * 0x900)
+#define LTQ_SWITCH_MAC_PDI_X_BASE(x) (LTQ_SWITCH_MAC_PDI_0_BASE + x * 0x30)
+#define LTQ_SWITCH_TOPLEVEL_BASE (LTQ_SWITCH_BASE + 4 * 0xC40)
+#define LTQ_SWITCH_MDIO_PDI_BASE (LTQ_SWITCH_TOPLEVEL_BASE)
+#define LTQ_SWITCH_MII_PDI_BASE (LTQ_SWITCH_TOPLEVEL_BASE + 4 * 0x36)
+#define LTQ_SWITCH_PMAC_PDI_BASE (LTQ_SWITCH_TOPLEVEL_BASE + 4 * 0x82)
+
+#define LTQ_ETHSW_MAC_CTRL0_PADEN (1 << 8)
+#define LTQ_ETHSW_MAC_CTRL0_FCS (1 << 7)
+#define LTQ_ETHSW_MAC_CTRL1_SHORTPRE (1 << 8)
+#define LTQ_ETHSW_MAC_CTRL2_MLEN (1 << 3)
+#define LTQ_ETHSW_MAC_CTRL2_LCHKL (1 << 2)
+#define LTQ_ETHSW_MAC_CTRL2_LCHKS_DIS 0
+#define LTQ_ETHSW_MAC_CTRL2_LCHKS_UNTAG 1
+#define LTQ_ETHSW_MAC_CTRL2_LCHKS_TAG 2
+#define LTQ_ETHSW_MAC_CTRL6_RBUF_DLY_WP_SHIFT 9
+#define LTQ_ETHSW_MAC_CTRL6_RXBUF_BYPASS (1 << 6)
+#define LTQ_ETHSW_GLOB_CTRL_SE (1 << 15)
+#define LTQ_ETHSW_MDC_CFG1_MCEN (1 << 8)
+#define LTQ_ETHSW_PMAC_HD_CTL_FC (1 << 10)
+#define LTQ_ETHSW_PMAC_HD_CTL_RC (1 << 4)
+#define LTQ_ETHSW_PMAC_HD_CTL_AC (1 << 2)
+#define ADVERTIZE_MPD (1 << 10)
+
+#define MDIO_DEVAD_NONE (-1)
+
+#define LTQ_ETH_RX_BUFFER_CNT PKTBUFSRX
+
+#define LTQ_MDIO_DRV_NAME "ltq-mdio"
+#define LTQ_ETH_DRV_NAME "ltq-eth"
+
+#define LTQ_ETHSW_MAX_GMAC 1
+#define LTQ_ETHSW_PMAC 1
+
+#define ltq_setbits(a, set) \
+ ltq_w32(ltq_r32(a) | (set), a)
+
+enum ltq_reset_modules {
+ LTQ_RESET_CORE,
+ LTQ_RESET_DMA,
+ LTQ_RESET_ETH,
+ LTQ_RESET_PHY,
+ LTQ_RESET_HARD,
+ LTQ_RESET_SOFT,
+};
+
+static inline void
+dbg_ltq_writel(void *a, unsigned int b)
+{
+ ltq_w32(b, a);
+}
+
+int ltq_reset_once(enum ltq_reset_modules module, ulong usec);
+
+struct ltq_ethsw_mac_pdi_x_regs {
+ u32 pstat; /* Port status */
+ u32 pisr; /* Interrupt status */
+ u32 pier; /* Interrupt enable */
+ u32 ctrl_0; /* Control 0 */
+ u32 ctrl_1; /* Control 1 */
+ u32 ctrl_2; /* Control 2 */
+ u32 ctrl_3; /* Control 3 */
+ u32 ctrl_4; /* Control 4 */
+ u32 ctrl_5; /* Control 5 */
+ u32 ctrl_6; /* Control 6 */
+ u32 bufst; /* TX/RX buffer control */
+ u32 testen; /* Test enable */
+};
+
+struct ltq_ethsw_mac_pdi_regs {
+ struct ltq_ethsw_mac_pdi_x_regs mac[12];
+};
+
+struct ltq_ethsw_mdio_pdi_regs {
+ u32 glob_ctrl; /* Global control 0 */
+ u32 rsvd0[7];
+ u32 mdio_ctrl; /* MDIO control */
+ u32 mdio_read; /* MDIO read data */
+ u32 mdio_write; /* MDIO write data */
+ u32 mdc_cfg_0; /* MDC clock configuration 0 */
+ u32 mdc_cfg_1; /* MDC clock configuration 1 */
+ u32 rsvd[3];
+ u32 phy_addr_5; /* PHY address port 5 */
+ u32 phy_addr_4; /* PHY address port 4 */
+ u32 phy_addr_3; /* PHY address port 3 */
+ u32 phy_addr_2; /* PHY address port 2 */
+ u32 phy_addr_1; /* PHY address port 1 */
+ u32 phy_addr_0; /* PHY address port 0 */
+ u32 mdio_stat_0; /* MDIO PHY polling status port 0 */
+ u32 mdio_stat_1; /* MDIO PHY polling status port 1 */
+ u32 mdio_stat_2; /* MDIO PHY polling status port 2 */
+ u32 mdio_stat_3; /* MDIO PHY polling status port 3 */
+ u32 mdio_stat_4; /* MDIO PHY polling status port 4 */
+ u32 mdio_stat_5; /* MDIO PHY polling status port 5 */
+};
+
+struct ltq_ethsw_mii_pdi_regs {
+ u32 mii_cfg0; /* xMII port 0 configuration */
+ u32 pcdu0; /* Port 0 clock delay configuration */
+ u32 mii_cfg1; /* xMII port 1 configuration */
+ u32 pcdu1; /* Port 1 clock delay configuration */
+ u32 mii_cfg2; /* xMII port 2 configuration */
+ u32 rsvd0;
+ u32 mii_cfg3; /* xMII port 3 configuration */
+ u32 rsvd1;
+ u32 mii_cfg4; /* xMII port 4 configuration */
+ u32 rsvd2;
+ u32 mii_cfg5; /* xMII port 5 configuration */
+ u32 pcdu5; /* Port 5 clock delay configuration */
+};
+
+struct ltq_ethsw_pmac_pdi_regs {
+ u32 hd_ctl; /* PMAC header control */
+ u32 tl; /* PMAC type/length */
+ u32 sa1; /* PMAC source address 1 */
+ u32 sa2; /* PMAC source address 2 */
+ u32 sa3; /* PMAC source address 3 */
+ u32 da1; /* PMAC destination address 1 */
+ u32 da2; /* PMAC destination address 2 */
+ u32 da3; /* PMAC destination address 3 */
+ u32 vlan; /* PMAC VLAN */
+ u32 rx_ipg; /* PMAC interpacket gap in RX direction */
+ u32 st_etype; /* PMAC special tag ethertype */
+ u32 ewan; /* PMAC ethernet WAN group */
+};
+
+struct ltq_mdio_phy_addr_reg {
+ union {
+ struct {
+ unsigned rsvd:1;
+ unsigned lnkst:2; /* Link status control */
+ unsigned speed:2; /* Speed control */
+ unsigned fdup:2; /* Full duplex control */
+ unsigned fcontx:2; /* Flow control mode TX */
+ unsigned fconrx:2; /* Flow control mode RX */
+ unsigned addr:5; /* PHY address */
+ } bits;
+ u16 val;
+ };
+};
+
+enum ltq_mdio_phy_addr_lnkst {
+ LTQ_MDIO_PHY_ADDR_LNKST_AUTO = 0,
+ LTQ_MDIO_PHY_ADDR_LNKST_UP = 1,
+ LTQ_MDIO_PHY_ADDR_LNKST_DOWN = 2,
+};
+
+enum ltq_mdio_phy_addr_speed {
+ LTQ_MDIO_PHY_ADDR_SPEED_M10 = 0,
+ LTQ_MDIO_PHY_ADDR_SPEED_M100 = 1,
+ LTQ_MDIO_PHY_ADDR_SPEED_G1 = 2,
+ LTQ_MDIO_PHY_ADDR_SPEED_AUTO = 3,
+};
+
+enum ltq_mdio_phy_addr_fdup {
+ LTQ_MDIO_PHY_ADDR_FDUP_AUTO = 0,
+ LTQ_MDIO_PHY_ADDR_FDUP_ENABLE = 1,
+ LTQ_MDIO_PHY_ADDR_FDUP_DISABLE = 3,
+};
+
+enum ltq_mdio_phy_addr_fcon {
+ LTQ_MDIO_PHY_ADDR_FCON_AUTO = 0,
+ LTQ_MDIO_PHY_ADDR_FCON_ENABLE = 1,
+ LTQ_MDIO_PHY_ADDR_FCON_DISABLE = 3,
+};
+
+struct ltq_mii_mii_cfg_reg {
+ union {
+ struct {
+ unsigned res:1; /* Hardware reset */
+ unsigned en:1; /* xMII interface enable */
+ unsigned isol:1; /* xMII interface isolate */
+ unsigned ldclkdis:1; /* Link down clock disable */
+ unsigned rsvd:1;
+ unsigned crs:2; /* CRS sensitivity config */
+ unsigned rgmii_ibs:1; /* RGMII In Band status */
+ unsigned rmii:1; /* RMII ref clock direction */
+ unsigned miirate:3; /* xMII interface clock rate */
+ unsigned miimode:4; /* xMII interface mode */
+ } bits;
+ u16 val;
+ };
+};
+
+enum ltq_mii_mii_cfg_miirate {
+ LTQ_MII_MII_CFG_MIIRATE_M2P5 = 0,
+ LTQ_MII_MII_CFG_MIIRATE_M25 = 1,
+ LTQ_MII_MII_CFG_MIIRATE_M125 = 2,
+ LTQ_MII_MII_CFG_MIIRATE_M50 = 3,
+ LTQ_MII_MII_CFG_MIIRATE_AUTO = 4,
+};
+
+enum ltq_mii_mii_cfg_miimode {
+ LTQ_MII_MII_CFG_MIIMODE_MIIP = 0,
+ LTQ_MII_MII_CFG_MIIMODE_MIIM = 1,
+ LTQ_MII_MII_CFG_MIIMODE_RMIIP = 2,
+ LTQ_MII_MII_CFG_MIIMODE_RMIIM = 3,
+ LTQ_MII_MII_CFG_MIIMODE_RGMII = 4,
+};
+
+struct ltq_eth_priv {
+ struct ltq_dma_device *dma_dev;
+ struct mii_dev *bus;
+ struct eth_device *dev;
+ struct phy_device *phymap[LTQ_ETHSW_MAX_GMAC];
+ int rx_num;
+};
+
+enum ltq_mdio_mbusy {
+ LTQ_MDIO_MBUSY_IDLE = 0,
+ LTQ_MDIO_MBUSY_BUSY = 1,
+};
+
+enum ltq_mdio_op {
+ LTQ_MDIO_OP_WRITE = 1,
+ LTQ_MDIO_OP_READ = 2,
+};
+
+struct ltq_mdio_access {
+ union {
+ struct {
+ unsigned rsvd:3;
+ unsigned mbusy:1;
+ unsigned op:2;
+ unsigned phyad:5;
+ unsigned regad:5;
+ } bits;
+ u16 val;
+ };
+};
+
+enum LTQ_ETH_PORT_FLAGS {
+ LTQ_ETH_PORT_NONE = 0,
+ LTQ_ETH_PORT_PHY = 1,
+ LTQ_ETH_PORT_SWITCH = (1 << 1),
+ LTQ_ETH_PORT_MAC = (1 << 2),
+};
+
+struct ltq_eth_port_config {
+ u8 num;
+ u8 phy_addr;
+ u16 flags;
+ phy_interface_t phy_if;
+};
+
+struct ltq_eth_board_config {
+ const struct ltq_eth_port_config *ports;
+ int num_ports;
+};
+
+static const struct ltq_eth_port_config eth_port_config[] = {
+ /* GMAC0: external Lantiq PEF7071 10/100/1000 PHY for LAN port 0 */
+ { 0, 0x0, LTQ_ETH_PORT_PHY, PHY_INTERFACE_MODE_RGMII },
+ /* GMAC1: external Lantiq PEF7071 10/100/1000 PHY for LAN port 1 */
+ { 1, 0x1, LTQ_ETH_PORT_PHY, PHY_INTERFACE_MODE_RGMII },
+};
+
+static const struct ltq_eth_board_config board_config = {
+ .ports = eth_port_config,
+ .num_ports = ARRAY_SIZE(eth_port_config),
+};
+
+static struct ltq_ethsw_mac_pdi_regs *ltq_ethsw_mac_pdi_regs =
+ (struct ltq_ethsw_mac_pdi_regs *) CKSEG1ADDR(LTQ_SWITCH_MAC_PDI_0_BASE);
+
+static struct ltq_ethsw_mdio_pdi_regs *ltq_ethsw_mdio_pdi_regs =
+ (struct ltq_ethsw_mdio_pdi_regs *) CKSEG1ADDR(LTQ_SWITCH_MDIO_PDI_BASE);
+
+static struct ltq_ethsw_mii_pdi_regs *ltq_ethsw_mii_pdi_regs =
+ (struct ltq_ethsw_mii_pdi_regs *) CKSEG1ADDR(LTQ_SWITCH_MII_PDI_BASE);
+
+static struct ltq_ethsw_pmac_pdi_regs *ltq_ethsw_pmac_pdi_regs =
+ (struct ltq_ethsw_pmac_pdi_regs *) CKSEG1ADDR(LTQ_SWITCH_PMAC_PDI_BASE);
+
+
+#define MAX_DMA_CHAN 0x8
+#define MAX_DMA_CRC_LEN 0x4
+#define MAX_DMA_DATA_LEN 0x600
+
+/* use 2 static channels for TX/RX
+ depending on the SoC we need to use different DMA channels for ethernet */
+#define LTQ_ETOP_TX_CHANNEL 1
+#define LTQ_ETOP_RX_CHANNEL 0
+
+#define IS_TX(x) (x == LTQ_ETOP_TX_CHANNEL)
+#define IS_RX(x) (x == LTQ_ETOP_RX_CHANNEL)
+
+#define DRV_VERSION "1.0"
+
+static void __iomem *ltq_vrx200_membase;
+
+struct ltq_vrx200_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_vrx200_priv {
+ struct net_device *netdev;
+ struct ltq_eth_data *pldata;
+ struct resource *res;
+
+ struct mii_bus *mii_bus;
+ struct phy_device *phydev;
+
+ struct ltq_vrx200_chan ch[MAX_DMA_CHAN];
+ int tx_free[MAX_DMA_CHAN >> 1];
+
+ spinlock_t lock;
+
+ struct clk *clk_ppe;
+};
+
+static int ltq_vrx200_mdio_wr(struct mii_bus *bus, int phy_addr,
+ int phy_reg, u16 phy_data);
+
+static int
+ltq_vrx200_alloc_skb(struct ltq_vrx200_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_vrx200_hw_receive(struct ltq_vrx200_chan *ch)
+{
+ struct ltq_vrx200_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_vrx200_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_vrx200_poll_rx(struct napi_struct *napi, int budget)
+{
+ struct ltq_vrx200_chan *ch = container_of(napi,
+ struct ltq_vrx200_chan, napi);
+ struct ltq_vrx200_priv *priv = netdev_priv(ch->netdev);
+ int rx = 0;
+ int complete = 0;
+ unsigned long flags;
+
+ 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_vrx200_hw_receive(ch);
+ rx++;
+ } else {
+ complete = 1;
+ }
+ }
+ if (complete || !rx) {
+ napi_complete(&ch->napi);
+ spin_lock_irqsave(&priv->lock, flags);
+ ltq_dma_ack_irq(&ch->dma);
+ spin_unlock_irqrestore(&priv->lock, flags);
+ }
+ return rx;
+}
+
+static int
+ltq_vrx200_poll_tx(struct napi_struct *napi, int budget)
+{
+ struct ltq_vrx200_chan *ch =
+ container_of(napi, struct ltq_vrx200_chan, napi);
+ struct ltq_vrx200_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);
+ spin_lock_irqsave(&priv->lock, flags);
+ ltq_dma_ack_irq(&ch->dma);
+ spin_unlock_irqrestore(&priv->lock, flags);
+ return 1;
+}
+
+static irqreturn_t
+ltq_vrx200_dma_irq(int irq, void *_priv)
+{
+ struct ltq_vrx200_priv *priv = _priv;
+ int ch = irq - LTQ_DMA_ETOP;
+
+ napi_schedule(&priv->ch[ch].napi);
+ return IRQ_HANDLED;
+}
+
+static void
+ltq_vrx200_free_channel(struct net_device *dev, struct ltq_vrx200_chan *ch)
+{
+ struct ltq_vrx200_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_vrx200_hw_exit(struct net_device *dev)
+{
+ struct ltq_vrx200_priv *priv = netdev_priv(dev);
+ int i;
+
+ clk_disable(priv->clk_ppe);
+
+ for (i = 0; i < MAX_DMA_CHAN; i++)
+ if (IS_TX(i) || IS_RX(i))
+ ltq_vrx200_free_channel(dev, &priv->ch[i]);
+}
+
+static void *ltq_eth_phy_addr_reg(int num)
+{
+ switch (num) {
+ case 0:
+ return &ltq_ethsw_mdio_pdi_regs->phy_addr_0;
+ case 1:
+ return &ltq_ethsw_mdio_pdi_regs->phy_addr_1;
+ case 2:
+ return &ltq_ethsw_mdio_pdi_regs->phy_addr_2;
+ case 3:
+ return &ltq_ethsw_mdio_pdi_regs->phy_addr_3;
+ case 4:
+ return &ltq_ethsw_mdio_pdi_regs->phy_addr_4;
+ case 5:
+ return &ltq_ethsw_mdio_pdi_regs->phy_addr_5;
+ }
+
+ return NULL;
+}
+
+static void *ltq_eth_mii_cfg_reg(int num)
+{
+ switch (num) {
+ case 0:
+ return &ltq_ethsw_mii_pdi_regs->mii_cfg0;
+ case 1:
+ return &ltq_ethsw_mii_pdi_regs->mii_cfg1;
+ case 2:
+ return &ltq_ethsw_mii_pdi_regs->mii_cfg2;
+ case 3:
+ return &ltq_ethsw_mii_pdi_regs->mii_cfg3;
+ case 4:
+ return &ltq_ethsw_mii_pdi_regs->mii_cfg4;
+ case 5:
+ return &ltq_ethsw_mii_pdi_regs->mii_cfg5;
+ }
+
+ return NULL;
+}
+
+static void ltq_eth_gmac_update(struct phy_device *phydev, int num)
+{
+ struct ltq_mdio_phy_addr_reg phy_addr_reg;
+ struct ltq_mii_mii_cfg_reg mii_cfg_reg;
+ void *phy_addr = ltq_eth_phy_addr_reg(num);
+ void *mii_cfg = ltq_eth_mii_cfg_reg(num);
+
+ phy_addr_reg.val = ltq_r32(phy_addr);
+ mii_cfg_reg.val = ltq_r32(mii_cfg);
+
+ phy_addr_reg.bits.addr = phydev->addr;
+
+ if (phydev->link)
+ phy_addr_reg.bits.lnkst = LTQ_MDIO_PHY_ADDR_LNKST_UP;
+ else
+ phy_addr_reg.bits.lnkst = LTQ_MDIO_PHY_ADDR_LNKST_DOWN;
+
+ switch (phydev->speed) {
+ case SPEED_1000:
+ phy_addr_reg.bits.speed = LTQ_MDIO_PHY_ADDR_SPEED_G1;
+ mii_cfg_reg.bits.miirate = LTQ_MII_MII_CFG_MIIRATE_M125;
+ break;
+ case SPEED_100:
+ phy_addr_reg.bits.speed = LTQ_MDIO_PHY_ADDR_SPEED_M100;
+ switch (mii_cfg_reg.bits.miimode) {
+ case LTQ_MII_MII_CFG_MIIMODE_RMIIM:
+ case LTQ_MII_MII_CFG_MIIMODE_RMIIP:
+ mii_cfg_reg.bits.miirate = LTQ_MII_MII_CFG_MIIRATE_M50;
+ break;
+ default:
+ mii_cfg_reg.bits.miirate = LTQ_MII_MII_CFG_MIIRATE_M25;
+ break;
+ }
+ break;
+ default:
+ phy_addr_reg.bits.speed = LTQ_MDIO_PHY_ADDR_SPEED_M10;
+ mii_cfg_reg.bits.miirate = LTQ_MII_MII_CFG_MIIRATE_M2P5;
+ break;
+ }
+
+ if (phydev->duplex == DUPLEX_FULL)
+ phy_addr_reg.bits.fdup = LTQ_MDIO_PHY_ADDR_FDUP_ENABLE;
+ else
+ phy_addr_reg.bits.fdup = LTQ_MDIO_PHY_ADDR_FDUP_DISABLE;
+
+ dbg_ltq_writel(phy_addr, phy_addr_reg.val);
+ dbg_ltq_writel(mii_cfg, mii_cfg_reg.val);
+ udelay(1);
+}
+
+
+static void ltq_eth_port_config(struct ltq_vrx200_priv *priv,
+ const struct ltq_eth_port_config *port)
+{
+ struct ltq_mii_mii_cfg_reg mii_cfg_reg;
+ void *mii_cfg = ltq_eth_mii_cfg_reg(port->num);
+ int setup_gpio = 0;
+
+ mii_cfg_reg.val = ltq_r32(mii_cfg);
+
+
+ switch (port->num) {
+ case 0: /* xMII0 */
+ case 1: /* xMII1 */
+ switch (port->phy_if) {
+ case PHY_INTERFACE_MODE_MII:
+ if (port->flags & LTQ_ETH_PORT_PHY)
+ /* MII MAC mode, connected to external PHY */
+ mii_cfg_reg.bits.miimode =
+ LTQ_MII_MII_CFG_MIIMODE_MIIM;
+ else
+ /* MII PHY mode, connected to external MAC */
+ mii_cfg_reg.bits.miimode =
+ LTQ_MII_MII_CFG_MIIMODE_MIIP;
+ setup_gpio = 1;
+ break;
+ case PHY_INTERFACE_MODE_RMII:
+ if (port->flags & LTQ_ETH_PORT_PHY)
+ /* RMII MAC mode, connected to external PHY */
+ mii_cfg_reg.bits.miimode =
+ LTQ_MII_MII_CFG_MIIMODE_RMIIM;
+ else
+ /* RMII PHY mode, connected to external MAC */
+ mii_cfg_reg.bits.miimode =
+ LTQ_MII_MII_CFG_MIIMODE_RMIIP;
+ setup_gpio = 1;
+ break;
+ case PHY_INTERFACE_MODE_RGMII:
+ /* RGMII MAC mode, connected to external PHY */
+ mii_cfg_reg.bits.miimode =
+ LTQ_MII_MII_CFG_MIIMODE_RGMII;
+ setup_gpio = 1;
+ break;
+ default:
+ break;
+ }
+ break;
+ case 2: /* internal GPHY0 */
+ case 3: /* internal GPHY0 */
+ case 4: /* internal GPHY1 */
+ switch (port->phy_if) {
+ case PHY_INTERFACE_MODE_MII:
+ case PHY_INTERFACE_MODE_GMII:
+ /* MII MAC mode, connected to internal GPHY */
+ mii_cfg_reg.bits.miimode =
+ LTQ_MII_MII_CFG_MIIMODE_MIIM;
+ setup_gpio = 1;
+ break;
+ default:
+ break;
+ }
+ break;
+ case 5: /* internal GPHY1 or xMII2 */
+ switch (port->phy_if) {
+ case PHY_INTERFACE_MODE_MII:
+ /* MII MAC mode, connected to internal GPHY */
+ mii_cfg_reg.bits.miimode =
+ LTQ_MII_MII_CFG_MIIMODE_MIIM;
+ setup_gpio = 1;
+ break;
+ case PHY_INTERFACE_MODE_RGMII:
+ /* RGMII MAC mode, connected to external PHY */
+ mii_cfg_reg.bits.miimode =
+ LTQ_MII_MII_CFG_MIIMODE_RGMII;
+ setup_gpio = 1;
+ break;
+ default:
+ break;
+ }
+ break;
+ default:
+ break;
+ }
+
+ /* Enable MII interface */
+ mii_cfg_reg.bits.en = port->flags ? 1 : 0;
+ dbg_ltq_writel(mii_cfg, mii_cfg_reg.val);
+
+}
+
+static void ltq_eth_gmac_init(int num)
+{
+ struct ltq_mdio_phy_addr_reg phy_addr_reg;
+ struct ltq_mii_mii_cfg_reg mii_cfg_reg;
+ void *phy_addr = ltq_eth_phy_addr_reg(num);
+ void *mii_cfg = ltq_eth_mii_cfg_reg(num);
+ struct ltq_ethsw_mac_pdi_x_regs *mac_pdi_regs;
+
+ mac_pdi_regs = &ltq_ethsw_mac_pdi_regs->mac[num];
+
+ /* Reset PHY status to link down */
+ phy_addr_reg.val = ltq_r32(phy_addr);
+ phy_addr_reg.bits.addr = num;
+ phy_addr_reg.bits.lnkst = LTQ_MDIO_PHY_ADDR_LNKST_DOWN;
+ phy_addr_reg.bits.speed = LTQ_MDIO_PHY_ADDR_SPEED_M10;
+ phy_addr_reg.bits.fdup = LTQ_MDIO_PHY_ADDR_FDUP_DISABLE;
+ dbg_ltq_writel(phy_addr, phy_addr_reg.val);
+
+ /* Reset and disable MII interface */
+ mii_cfg_reg.val = ltq_r32(mii_cfg);
+ mii_cfg_reg.bits.en = 0;
+ mii_cfg_reg.bits.res = 1;
+ mii_cfg_reg.bits.miirate = LTQ_MII_MII_CFG_MIIRATE_M2P5;
+ dbg_ltq_writel(mii_cfg, mii_cfg_reg.val);
+
+ /*
+ * Enable padding of short frames, enable frame checksum generation
+ * in transmit direction
+ */
+ dbg_ltq_writel(&mac_pdi_regs->ctrl_0, LTQ_ETHSW_MAC_CTRL0_PADEN |
+ LTQ_ETHSW_MAC_CTRL0_FCS);
+
+ /* Set inter packet gap size to 12 bytes */
+ dbg_ltq_writel(&mac_pdi_regs->ctrl_1, 12);
+
+ /*
+ * Configure frame length checks:
+ * - allow jumbo frames
+ * - enable long length check
+ * - enable short length without VLAN tags
+ */
+ dbg_ltq_writel(&mac_pdi_regs->ctrl_2, LTQ_ETHSW_MAC_CTRL2_MLEN |
+ LTQ_ETHSW_MAC_CTRL2_LCHKL |
+ LTQ_ETHSW_MAC_CTRL2_LCHKS_UNTAG);
+}
+
+
+static void ltq_eth_pmac_init(void)
+{
+ struct ltq_ethsw_mac_pdi_x_regs *mac_pdi_regs;
+
+ mac_pdi_regs = &ltq_ethsw_mac_pdi_regs->mac[LTQ_ETHSW_PMAC];
+
+ /*
+ * Enable padding of short frames, enable frame checksum generation
+ * in transmit direction
+ */
+ dbg_ltq_writel(&mac_pdi_regs->ctrl_0, LTQ_ETHSW_MAC_CTRL0_PADEN |
+ LTQ_ETHSW_MAC_CTRL0_FCS);
+
+ /*
+ * Configure frame length checks:
+ * - allow jumbo frames
+ * - enable long length check
+ * - enable short length without VLAN tags
+ */
+ dbg_ltq_writel(&mac_pdi_regs->ctrl_2, LTQ_ETHSW_MAC_CTRL2_MLEN |
+ LTQ_ETHSW_MAC_CTRL2_LCHKL |
+ LTQ_ETHSW_MAC_CTRL2_LCHKS_UNTAG);
+
+ /*
+ * Apply workaround for buffer congestion:
+ * - shorten preambel to 1 byte
+ * - set minimum inter packet gap size to 7 bytes
+ * - enable receive buffer bypass mode
+ */
+ dbg_ltq_writel(&mac_pdi_regs->ctrl_1, LTQ_ETHSW_MAC_CTRL1_SHORTPRE | 7);
+ dbg_ltq_writel(&mac_pdi_regs->ctrl_6,
+ (6 << LTQ_ETHSW_MAC_CTRL6_RBUF_DLY_WP_SHIFT) |
+ LTQ_ETHSW_MAC_CTRL6_RXBUF_BYPASS);
+
+ /* Set request assertion threshold to 8, IPG counter to 11 */
+ dbg_ltq_writel(&ltq_ethsw_pmac_pdi_regs->rx_ipg, 0x8B);
+
+ /*
+ * Configure frame header control:
+ * - enable reaction on pause frames (flow control)
+ * - remove CRC for packets from PMAC to DMA
+ * - add CRC for packets from DMA to PMAC
+ */
+ dbg_ltq_writel(&ltq_ethsw_pmac_pdi_regs->hd_ctl, LTQ_ETHSW_PMAC_HD_CTL_FC |
+ /*LTQ_ETHSW_PMAC_HD_CTL_RC | */LTQ_ETHSW_PMAC_HD_CTL_AC);
+}
+
+static int
+ltq_vrx200_hw_init(struct net_device *dev)
+{
+ struct ltq_vrx200_priv *priv = netdev_priv(dev);
+ int err = 0;
+ int i;
+
+ netdev_info(dev, "setting up dma\n");
+ ltq_dma_init_port(DMA_PORT_ETOP);
+
+ netdev_info(dev, "setting up pmu\n");
+ clk_enable(priv->clk_ppe);
+
+ /* Reset ethernet and switch subsystems */
+ netdev_info(dev, "reset core\n");
+ ltq_reset_once(BIT(8), 10);
+
+ /* Enable switch macro */
+ ltq_setbits(&ltq_ethsw_mdio_pdi_regs->glob_ctrl,
+ LTQ_ETHSW_GLOB_CTRL_SE);
+
+ /* Disable MDIO auto-polling for all ports */
+ dbg_ltq_writel(&ltq_ethsw_mdio_pdi_regs->mdc_cfg_0, 0);
+
+ /*
+ * Enable and set MDIO management clock to 2.5 MHz. This is the
+ * maximum clock for FE PHYs.
+ * Formula for clock is:
+ *
+ * 50 MHz
+ * x = ----------- - 1
+ * 2 * f_MDC
+ */
+ dbg_ltq_writel(&ltq_ethsw_mdio_pdi_regs->mdc_cfg_1,
+ LTQ_ETHSW_MDC_CFG1_MCEN | 9);
+
+ /* Init MAC connected to CPU */
+ ltq_eth_pmac_init();
+
+ /* Init MACs connected to external MII interfaces */
+ for (i = 0; i < LTQ_ETHSW_MAX_GMAC; i++)
+ ltq_eth_gmac_init(i);
+
+ for (i = 0; i < MAX_DMA_CHAN && !err; i++) {
+ int irq = LTQ_DMA_ETOP + i;
+ struct ltq_vrx200_chan *ch = &priv->ch[i];
+
+ ch->idx = ch->dma.nr = i;
+
+ if (IS_TX(i)) {
+ ltq_dma_alloc_tx(&ch->dma);
+ err = request_irq(irq, ltq_vrx200_dma_irq, IRQF_DISABLED,
+ "vrx200_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_vrx200_alloc_skb(ch))
+ err = -ENOMEM;
+ ch->dma.desc = 0;
+ err = request_irq(irq, ltq_vrx200_dma_irq, IRQF_DISABLED,
+ "vrx200_rx", priv);
+ }
+ if (!err)
+ ch->dma.irq = irq;
+ }
+ for (i = 0; i < board_config.num_ports; i++)
+ ltq_eth_port_config(priv, &board_config.ports[i]);
+ return err;
+}
+
+static void
+ltq_vrx200_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_vrx200_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+ struct ltq_vrx200_priv *priv = netdev_priv(dev);
+
+ return phy_ethtool_gset(priv->phydev, cmd);
+}
+
+static int
+ltq_vrx200_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
+{
+ struct ltq_vrx200_priv *priv = netdev_priv(dev);
+
+ return phy_ethtool_sset(priv->phydev, cmd);
+}
+
+static int
+ltq_vrx200_nway_reset(struct net_device *dev)
+{
+ struct ltq_vrx200_priv *priv = netdev_priv(dev);
+
+ return phy_start_aneg(priv->phydev);
+}
+
+static const struct ethtool_ops ltq_vrx200_ethtool_ops = {
+ .get_drvinfo = ltq_vrx200_get_drvinfo,
+ .get_settings = ltq_vrx200_get_settings,
+ .set_settings = ltq_vrx200_set_settings,
+ .nway_reset = ltq_vrx200_nway_reset,
+};
+
+static inline int ltq_mdio_poll(struct mii_bus *bus)
+{
+ struct ltq_mdio_access acc;
+ unsigned cnt = 10000;
+
+ while (likely(cnt--)) {
+ acc.val = ltq_r32(&ltq_ethsw_mdio_pdi_regs->mdio_ctrl);
+ if (!acc.bits.mbusy)
+ return 0;
+ }
+
+ return 1;
+}
+
+static int
+ltq_vrx200_mdio_wr(struct mii_bus *bus, int addr, int regnum, u16 val)
+{
+ struct ltq_mdio_access acc;
+ int ret;
+
+ acc.val = 0;
+ acc.bits.mbusy = LTQ_MDIO_MBUSY_BUSY;
+ acc.bits.op = LTQ_MDIO_OP_WRITE;
+ acc.bits.phyad = addr;
+ acc.bits.regad = regnum;
+
+ ret = ltq_mdio_poll(bus);
+ if (ret)
+ return ret;
+
+ dbg_ltq_writel(&ltq_ethsw_mdio_pdi_regs->mdio_write, val);
+ dbg_ltq_writel(&ltq_ethsw_mdio_pdi_regs->mdio_ctrl, acc.val);
+
+ return 0;
+}
+
+static int
+ltq_vrx200_mdio_rd(struct mii_bus *bus, int addr, int regnum)
+{
+ struct ltq_mdio_access acc;
+ int ret;
+
+ acc.val = 0;
+ acc.bits.mbusy = LTQ_MDIO_MBUSY_BUSY;
+ acc.bits.op = LTQ_MDIO_OP_READ;
+ acc.bits.phyad = addr;
+ acc.bits.regad = regnum;
+
+ ret = ltq_mdio_poll(bus);
+ if (ret)
+ goto timeout;
+
+ dbg_ltq_writel(&ltq_ethsw_mdio_pdi_regs->mdio_ctrl, acc.val);
+
+ ret = ltq_mdio_poll(bus);
+ if (ret)
+ goto timeout;
+
+ ret = ltq_r32(&ltq_ethsw_mdio_pdi_regs->mdio_read);
+
+ return ret;
+timeout:
+ return -1;
+}
+
+static void
+ltq_vrx200_mdio_link(struct net_device *dev)
+{
+ struct ltq_vrx200_priv *priv = netdev_priv(dev);
+ ltq_eth_gmac_update(priv->phydev, 0);
+}
+
+static int
+ltq_vrx200_mdio_probe(struct net_device *dev)
+{
+ struct ltq_vrx200_priv *priv = netdev_priv(dev);
+ struct phy_device *phydev = NULL;
+ int val;
+
+ phydev = priv->mii_bus->phy_map[0];
+
+ if (!phydev) {
+ netdev_err(dev, "no PHY found\n");
+ return -ENODEV;
+ }
+
+ phydev = phy_connect(dev, dev_name(&phydev->dev), &ltq_vrx200_mdio_link,
+ 0, 0);
+
+ 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_1000baseT_Half
+ | SUPPORTED_1000baseT_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);
+
+ val = ltq_vrx200_mdio_rd(priv->mii_bus, MDIO_DEVAD_NONE, MII_CTRL1000);
+ val |= ADVERTIZE_MPD;
+ ltq_vrx200_mdio_wr(priv->mii_bus, MDIO_DEVAD_NONE, MII_CTRL1000, val);
+ ltq_vrx200_mdio_wr(priv->mii_bus, 0, 0, 0x1040);
+
+ phy_start_aneg(phydev);
+
+ return 0;
+}
+
+static int
+ltq_vrx200_mdio_init(struct net_device *dev)
+{
+ struct ltq_vrx200_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_vrx200_mdio_rd;
+ priv->mii_bus->write = ltq_vrx200_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_vrx200_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_vrx200_mdio_cleanup(struct net_device *dev)
+{
+ struct ltq_vrx200_priv *priv = netdev_priv(dev);
+
+ phy_disconnect(priv->phydev);
+ mdiobus_unregister(priv->mii_bus);
+ kfree(priv->mii_bus->irq);
+ mdiobus_free(priv->mii_bus);
+}
+
+void phy_dump(struct net_device *dev)
+{
+ struct ltq_vrx200_priv *priv = netdev_priv(dev);
+ int i;
+ for (i = 0; i < 0x1F; i++) {
+ unsigned int val = ltq_vrx200_mdio_rd(priv->mii_bus, 0, i);
+ printk("%d %4X\n", i, val);
+ }
+}
+
+static int
+ltq_vrx200_open(struct net_device *dev)
+{
+ struct ltq_vrx200_priv *priv = netdev_priv(dev);
+ int i;
+ unsigned long flags;
+
+ for (i = 0; i < MAX_DMA_CHAN; i++) {
+ struct ltq_vrx200_chan *ch = &priv->ch[i];
+
+ if (!IS_TX(i) && (!IS_RX(i)))
+ continue;
+ napi_enable(&ch->napi);
+ spin_lock_irqsave(&priv->lock, flags);
+ ltq_dma_open(&ch->dma);
+ spin_unlock_irqrestore(&priv->lock, flags);
+ }
+ if (priv->phydev) {
+ phy_start(priv->phydev);
+ phy_dump(dev);
+ }
+ netif_tx_start_all_queues(dev);
+ return 0;
+}
+
+static int
+ltq_vrx200_stop(struct net_device *dev)
+{
+ struct ltq_vrx200_priv *priv = netdev_priv(dev);
+ int i;
+ unsigned long flags;
+
+ netif_tx_stop_all_queues(dev);
+ if (priv->phydev)
+ phy_stop(priv->phydev);
+ for (i = 0; i < MAX_DMA_CHAN; i++) {
+ struct ltq_vrx200_chan *ch = &priv->ch[i];
+
+ if (!IS_RX(i) && !IS_TX(i))
+ continue;
+ napi_disable(&ch->napi);
+ spin_lock_irqsave(&priv->lock, flags);
+ ltq_dma_close(&ch->dma);
+ spin_unlock_irqrestore(&priv->lock, flags);
+ }
+ return 0;
+}
+
+static int
+ltq_vrx200_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_vrx200_priv *priv = netdev_priv(dev);
+ struct ltq_vrx200_chan *ch = &priv->ch[(queue << 1) | 1];
+ struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc];
+ unsigned long flags;
+ u32 byte_offset;
+ int len;
+
+ len = skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len;
+
+ if ((desc->ctl & (LTQ_DMA_OWN | LTQ_DMA_C)) || ch->skb[ch->dma.desc]) {
+ 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_vrx200_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+{
+ struct ltq_vrx200_priv *priv = netdev_priv(dev);
+
+ /* TODO: mii-toll reports "No MII transceiver present!." ?!*/
+ return phy_mii_ioctl(priv->phydev, rq, cmd);
+}
+
+static u16
+ltq_vrx200_select_queue(struct net_device *dev, struct sk_buff *skb)
+{
+ /* we are currently only using the first queue */
+ return 0;
+}
+
+static int
+ltq_vrx200_init(struct net_device *dev)
+{
+ struct ltq_vrx200_priv *priv = netdev_priv(dev);
+ struct sockaddr mac;
+ int err;
+
+ ether_setup(dev);
+ dev->watchdog_timeo = 10 * HZ;
+
+ err = ltq_vrx200_hw_init(dev);
+ if (err)
+ goto err_hw;
+
+ memcpy(&mac, &priv->pldata->mac, sizeof(struct sockaddr));
+ if (!is_valid_ether_addr(mac.sa_data)) {
+ pr_warn("vrx200: invalid MAC, using random\n");
+ random_ether_addr(mac.sa_data);
+ }
+ eth_mac_addr(dev, &mac);
+
+ if (!ltq_vrx200_mdio_init(dev))
+ dev->ethtool_ops = &ltq_vrx200_ethtool_ops;
+ else
+ pr_warn("vrx200: mdio probe failed\n");;
+ return 0;
+
+err_hw:
+ ltq_vrx200_hw_exit(dev);
+ return err;
+}
+
+static void
+ltq_vrx200_tx_timeout(struct net_device *dev)
+{
+ int err;
+
+ ltq_vrx200_hw_exit(dev);
+ err = ltq_vrx200_hw_init(dev);
+ if (err)
+ goto err_hw;
+ dev->trans_start = jiffies;
+ netif_wake_queue(dev);
+ return;
+
+err_hw:
+ ltq_vrx200_hw_exit(dev);
+ netdev_err(dev, "failed to restart vrx200 after TX timeout\n");
+}
+
+static const struct net_device_ops ltq_eth_netdev_ops = {
+ .ndo_open = ltq_vrx200_open,
+ .ndo_stop = ltq_vrx200_stop,
+ .ndo_start_xmit = ltq_vrx200_tx,
+ .ndo_change_mtu = eth_change_mtu,
+ .ndo_do_ioctl = ltq_vrx200_ioctl,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_select_queue = ltq_vrx200_select_queue,
+ .ndo_init = ltq_vrx200_init,
+ .ndo_tx_timeout = ltq_vrx200_tx_timeout,
+};
+
+static int __devinit
+ltq_vrx200_probe(struct platform_device *pdev)
+{
+ struct net_device *dev;
+ struct ltq_vrx200_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 vrx200 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 vrx200 resource\n");
+ err = -EBUSY;
+ goto err_out;
+ }
+
+ ltq_vrx200_membase = devm_ioremap_nocache(&pdev->dev,
+ res->start, resource_size(res));
+ if (!ltq_vrx200_membase) {
+ dev_err(&pdev->dev, "failed to remap vrx200 engine %d\n",
+ pdev->id);
+ err = -ENOMEM;
+ goto err_out;
+ }
+
+ if (ltq_gpio_request(&pdev->dev, 42, 2, 1, "MDIO") ||
+ ltq_gpio_request(&pdev->dev, 43, 2, 1, "MDC")) {
+ dev_err(&pdev->dev, "failed to request MDIO gpios\n");
+ err = -EBUSY;
+ goto err_out;
+ }
+
+ dev = alloc_etherdev_mq(sizeof(struct ltq_vrx200_priv), 4);
+ strcpy(dev->name, "eth%d");
+ dev->netdev_ops = &ltq_eth_netdev_ops;
+ priv = netdev_priv(dev);
+ priv->res = res;
+ priv->pldata = dev_get_platdata(&pdev->dev);
+ priv->netdev = dev;
+
+ priv->clk_ppe = clk_get(&pdev->dev, NULL);
+ if (IS_ERR(priv->clk_ppe))
+ return PTR_ERR(priv->clk_ppe);
+
+ 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_vrx200_poll_tx, 8);
+ else if (IS_RX(i))
+ netif_napi_add(dev, &priv->ch[i].napi,
+ ltq_vrx200_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_vrx200_remove(struct platform_device *pdev)
+{
+ struct net_device *dev = platform_get_drvdata(pdev);
+
+ if (dev) {
+ netif_tx_stop_all_queues(dev);
+ ltq_vrx200_hw_exit(dev);
+ ltq_vrx200_mdio_cleanup(dev);
+ unregister_netdev(dev);
+ }
+ return 0;
+}
+
+static struct platform_driver ltq_mii_driver = {
+ .probe = ltq_vrx200_probe,
+ .remove = __devexit_p(ltq_vrx200_remove),
+ .driver = {
+ .name = "ltq_vrx200",
+ .owner = THIS_MODULE,
+ },
+};
+
+module_platform_driver(ltq_mii_driver);
+
+MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
+MODULE_DESCRIPTION("Lantiq SoC ETOP");
+MODULE_LICENSE("GPL");
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