c512c176e7
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3687 42af7a65-404d-4744-a932-0658087f49c3
1050 lines
32 KiB
C
1050 lines
32 KiB
C
/****************************************************************************
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* drivers/net/e1000.c
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*
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* Copyright (C) 2011 Yu Qiang. All rights reserved.
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* Author: Yu Qiang <yuq825@gmail.com>
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*
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* This file is a part of NuttX:
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*
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* Copyright (C) 2011 Gregory Nutt. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/kmalloc.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <time.h>
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#include <debug.h>
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#include <wdog.h>
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#include <errno.h>
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#include <nuttx/irq.h>
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#include <nuttx/arch.h>
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#include <net/uip/uip.h>
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#include <net/uip/uip-arp.h>
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#include <net/uip/uip-arch.h>
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#include <rgmp/pmap.h>
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#include <rgmp/pci.h>
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#include <rgmp/string.h>
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#include <rgmp/x86.h>
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#include <rgmp/stdio.h>
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#include "e1000.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* TX poll deley = 1 seconds. CLK_TCK is the number of clock ticks per second */
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#define E1000_WDDELAY (1*CLK_TCK)
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#define E1000_POLLHSEC (1*2)
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/* TX timeout = 1 minute */
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#define E1000_TXTIMEOUT (60*CLK_TCK)
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/* This is a helper pointer for accessing the contents of the Ethernet header */
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#define BUF ((struct uip_eth_hdr *)e1000->uip_dev.d_buf)
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/****************************************************************************
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* Private Types
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****************************************************************************/
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struct tx_ring {
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struct tx_desc *desc;
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char *buf;
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int tail; // where to write desc
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};
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struct rx_ring {
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struct rx_desc *desc;
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char *buf;
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int head; // where to read
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int tail; // where to release free desc
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int free; // number of freed desc
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};
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struct e1000_dev {
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uint32_t phy_mem_base;
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uint32_t io_mem_base;
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uint32_t mem_size;
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int pci_dev_id;
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unsigned char src_mac[6];
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unsigned char dst_mac[6];
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int irq;
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struct irq_action int_desc;
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struct tx_ring tx_ring;
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struct rx_ring rx_ring;
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struct e1000_dev *next;
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// NuttX net data
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bool bifup; /* true:ifup false:ifdown */
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WDOG_ID txpoll; /* TX poll timer */
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WDOG_ID txtimeout; /* TX timeout timer */
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/* This holds the information visible to uIP/NuttX */
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struct uip_driver_s uip_dev; /* Interface understood by uIP */
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};
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struct e1000_dev_head {
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struct e1000_dev *next;
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};
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static struct e1000_dev_head e1000_list = {0};
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/* Common TX logic */
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static int e1000_transmit(struct e1000_dev *e1000);
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static int e1000_uiptxpoll(struct uip_driver_s *dev);
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/* Interrupt handling */
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static void e1000_receive(struct e1000_dev *e1000);
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/* Watchdog timer expirations */
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static void e1000_polltimer(int argc, uint32_t arg, ...);
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static void e1000_txtimeout(int argc, uint32_t arg, ...);
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/* NuttX callback functions */
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static int e1000_ifup(struct uip_driver_s *dev);
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static int e1000_ifdown(struct uip_driver_s *dev);
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static int e1000_txavail(struct uip_driver_s *dev);
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#ifdef CONFIG_NET_IGMP
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static int e1000_addmac(struct uip_driver_s *dev, const uint8_t *mac);
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static int e1000_rmmac(struct uip_driver_s *dev, const uint8_t *mac);
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#endif
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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static inline void e1000_outl(struct e1000_dev *dev, int reg, uint32_t val)
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{
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writel(dev->io_mem_base+reg, val);
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}
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static inline uint32_t e1000_inl(struct e1000_dev *dev, int reg)
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{
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return readl(dev->io_mem_base+reg);
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}
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/****************************** e1000 driver ********************************/
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void e1000_reset(struct e1000_dev *dev)
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{
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uint32_t dev_control;
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// Reset the network controller hardware
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dev_control = 0;
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dev_control |= (1<<0); // FD-bit (Full Duplex)
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dev_control |= (0<<2); // GIOMD-bit (GIO Master Disable)
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dev_control |= (1<<3); // LRST-bit (Link Reset)
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dev_control |= (1<<6); // SLU-bit (Set Link Up)
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dev_control |= (2<<8); // SPEED=2 (1000Mbps)
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dev_control |= (0<<11); // FRCSPD-bit (Force Speed)
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dev_control |= (0<<12); // FRCDPLX-bit (Force Duplex)
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dev_control |= (0<<20); // ADVD3WUC-bit (Advertise D3 Wake Up Cap)
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dev_control |= (1<<26); // RST-bit (Device Reset)
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dev_control |= (1<<27); // RFCE-bit (Receive Flow Control Enable)
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dev_control |= (1<<28); // TFCE-bit (Transmit Flow Control Enable)
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dev_control |= (0<<30); // VME-bit (VLAN Mode Enable)
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dev_control |= (0<<31); // PHY_RST-bit (PHY Reset)
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e1000_outl(dev, E1000_IMC, 0xFFFFFFFF);
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e1000_outl(dev, E1000_STATUS, 0x00000000);
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e1000_outl(dev, E1000_CTRL, dev_control);
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dev_control &= ~(1<<26); // clear RST-bit (Device Reset)
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e1000_outl(dev, E1000_CTRL, dev_control);
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up_mdelay(10);
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e1000_outl(dev, E1000_CTRL_EXT, 0x001401C0);
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e1000_outl(dev, E1000_IMC, 0xFFFFFFFF);
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}
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void e1000_turn_on(struct e1000_dev *dev)
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{
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int tx_control, rx_control;
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uint32_t ims = 0;
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// turn on the controller's receive engine
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rx_control = e1000_inl(dev, E1000_RCTL);
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rx_control |= (1<<1);
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e1000_outl(dev, E1000_RCTL, rx_control);
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// turn on the controller's transmit engine
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tx_control = e1000_inl(dev, E1000_TCTL);
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tx_control |= (1<<1);
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e1000_outl(dev, E1000_TCTL, tx_control);
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// enable the controller's interrupts
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e1000_outl(dev, E1000_ICR, 0xFFFFFFFF);
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e1000_outl(dev, E1000_IMC, 0xFFFFFFFF);
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ims |= 1<<0; // TXDW
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ims |= 1<<1; // TXQE
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ims |= 1<<2; // LSC
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ims |= 1<<4; // RXDMT0
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ims |= 1<<7; // RXT0
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e1000_outl(dev, E1000_IMS, ims);
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}
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void e1000_turn_off(struct e1000_dev *dev)
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{
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int tx_control, rx_control;
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// turn off the controller's receive engine
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rx_control = e1000_inl(dev, E1000_RCTL);
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rx_control &= ~(1<<1);
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e1000_outl(dev, E1000_RCTL, rx_control);
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// turn off the controller's transmit engine
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tx_control = e1000_inl(dev, E1000_TCTL);
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tx_control &= ~(1<<1);
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e1000_outl(dev, E1000_TCTL, tx_control);
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// turn off the controller's interrupts
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e1000_outl(dev, E1000_IMC, 0xFFFFFFFF);
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}
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void e1000_init(struct e1000_dev *dev)
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{
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uint32_t rxd_phys, txd_phys, kmem_phys;
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uint32_t rx_control, tx_control;
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uint32_t pba;
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int i;
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e1000_reset(dev);
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// configure the controller's 'receive' engine
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rx_control = 0;
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rx_control |= (0<<1); // EN-bit (Enable)
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rx_control |= (0<<2); // SPB-bit (Store Bad Packets)
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rx_control |= (0<<3); // UPE-bit (Unicast Promiscuous Mode)
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rx_control |= (1<<4); // MPE-bit (Multicast Promiscuous Mode)
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rx_control |= (0<<5); // LPE-bit (Long Packet Enable)
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rx_control |= (0<<6); // LBM=0 (Loop-Back Mode)
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rx_control |= (0<<8); // RDMTS=0 (Rx Descriptor Min Threshold Size)
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rx_control |= (0<<10); // DTYPE=0 (Descriptor Type)
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rx_control |= (0<<12); // MO=0 (Multicast Offset)
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rx_control |= (1<<15); // BAM-bit (Broadcast Address Mode)
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rx_control |= (0<<16); // BSIZE=0 (Buffer Size = 2048)
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rx_control |= (0<<18); // VLE-bit (VLAN filter Enable)
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rx_control |= (0<<19); // CFIEN-bit (Canonical Form Indicator Enable)
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rx_control |= (0<<20); // CFI-bit (Canonical Form Indicator)
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rx_control |= (1<<22); // DPF-bit (Discard Pause Frames)
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rx_control |= (0<<23); // PMCF-bit (Pass MAC Control Frames)
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rx_control |= (0<<25); // BSEX=0 (Buffer Size EXtension)
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rx_control |= (1<<26); // SECRC-bit (Strip Ethernet CRC)
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rx_control |= (0<<27); // FLEXBUF=0 (Flexible Buffer size)
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e1000_outl(dev, E1000_RCTL, rx_control);
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// configure the controller's 'transmit' engine
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tx_control = 0;
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tx_control |= (0<<1); // EN-bit (Enable)
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tx_control |= (1<<3); // PSP-bit (Pad Short Packets)
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tx_control |= (15<<4); // CT=15 (Collision Threshold)
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tx_control |= (63<<12); // COLD=63 (Collision Distance)
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tx_control |= (0<<22); // SWXOFF-bit (Software XOFF)
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tx_control |= (1<<24); // RTLC-bit (Re-Transmit on Late Collision)
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tx_control |= (0<<25); // UNORTX-bit (Underrun No Re-Transmit)
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tx_control |= (0<<26); // TXCSCMT=0 (TxDesc Mininum Threshold)
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tx_control |= (0<<28); // MULR-bit (Multiple Request Support)
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e1000_outl(dev, E1000_TCTL, tx_control);
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// hardware flow control
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pba = e1000_inl(dev, E1000_PBA);
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// get receive FIFO size
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pba = (pba & 0x000000ff)<<10;
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e1000_outl(dev, E1000_FCAL, 0x00C28001);
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e1000_outl(dev, E1000_FCAH, 0x00000100);
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e1000_outl(dev, E1000_FCT, 0x00008808);
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e1000_outl(dev, E1000_FCTTV, 0x00000680);
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e1000_outl(dev, E1000_FCRTL, (pba*8/10)|0x80000000);
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e1000_outl(dev, E1000_FCRTH, pba*9/10);
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// setup tx rings
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txd_phys = PADDR(dev->tx_ring.desc);
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kmem_phys = PADDR(dev->tx_ring.buf);
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for (i=0; i<CONFIG_E1000_N_TX_DESC; i++,kmem_phys+=CONFIG_E1000_BUFF_SIZE) {
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dev->tx_ring.desc[i].base_address = kmem_phys;
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dev->tx_ring.desc[i].packet_length = 0;
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dev->tx_ring.desc[i].cksum_offset = 0;
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dev->tx_ring.desc[i].cksum_origin = 0;
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dev->tx_ring.desc[i].desc_status = 1;
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dev->tx_ring.desc[i].desc_command = (1<<0)|(1<<1)|(1<<3);
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dev->tx_ring.desc[i].special_info = 0;
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}
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dev->tx_ring.tail = 0;
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e1000_outl(dev, E1000_TDT, 0);
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e1000_outl(dev, E1000_TDH, 0);
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// tell controller the location, size, and fetch-policy for Tx queue
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e1000_outl(dev, E1000_TDBAL, txd_phys);
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e1000_outl(dev, E1000_TDBAH, 0x00000000);
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e1000_outl(dev, E1000_TDLEN, CONFIG_E1000_N_TX_DESC*16);
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e1000_outl(dev, E1000_TXDCTL, 0x01010000);
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// setup rx rings
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rxd_phys = PADDR(dev->rx_ring.desc);
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kmem_phys = PADDR(dev->rx_ring.buf);
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for (i=0; i<CONFIG_E1000_N_RX_DESC; i++,kmem_phys+=CONFIG_E1000_BUFF_SIZE) {
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dev->rx_ring.desc[i].base_address = kmem_phys;
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dev->rx_ring.desc[i].packet_length = 0;
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dev->rx_ring.desc[i].packet_cksum = 0;
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dev->rx_ring.desc[i].desc_status = 0;
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dev->rx_ring.desc[i].desc_errors = 0;
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dev->rx_ring.desc[i].vlan_tag = 0;
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}
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dev->rx_ring.head = 0;
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dev->rx_ring.tail = CONFIG_E1000_N_RX_DESC-1;
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dev->rx_ring.free = 0;
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// give the controller ownership of all receive descriptors
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e1000_outl(dev, E1000_RDH, 0);
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e1000_outl(dev, E1000_RDT, CONFIG_E1000_N_RX_DESC-1);
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// tell controller the location, size, and fetch-policy for RX queue
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e1000_outl(dev, E1000_RDBAL, rxd_phys);
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e1000_outl(dev, E1000_RDBAH, 0x00000000);
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e1000_outl(dev, E1000_RDLEN, CONFIG_E1000_N_RX_DESC*16);
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e1000_outl(dev, E1000_RXDCTL, 0x01010000);
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e1000_turn_on(dev);
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}
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/****************************************************************************
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* Function: e1000_transmit
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*
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* Description:
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* Start hardware transmission. Called either from the txdone interrupt
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* handling or from watchdog based polling.
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*
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* Parameters:
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* e1000 - Reference to the driver state structure
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*
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* Returned Value:
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* OK on success; a negated errno on failure
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*
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* Assumptions:
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* May or may not be called from an interrupt handler. In either case,
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* global interrupts are disabled, either explicitly or indirectly through
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* interrupt handling logic.
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*
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****************************************************************************/
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static int e1000_transmit(struct e1000_dev *e1000)
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{
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int tail = e1000->tx_ring.tail;
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unsigned char *cp = (unsigned char *)
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(e1000->tx_ring.buf + tail * CONFIG_E1000_BUFF_SIZE);
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int count = e1000->uip_dev.d_len;
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/* Verify that the hardware is ready to send another packet. If we get
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* here, then we are committed to sending a packet; Higher level logic
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* must have assured that there is not transmission in progress.
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*/
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if (!e1000->tx_ring.desc[tail].desc_status)
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return -1;
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/* Increment statistics */
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/* Send the packet: address=skel->sk_dev.d_buf, length=skel->sk_dev.d_len */
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memcpy(cp, e1000->uip_dev.d_buf, e1000->uip_dev.d_len);
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// prepare the transmit-descriptor
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e1000->tx_ring.desc[tail].packet_length = count<60 ? 60:count;
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e1000->tx_ring.desc[tail].desc_status = 0;
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// give ownership of this descriptor to the network controller
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tail = (tail + 1) % CONFIG_E1000_N_TX_DESC;
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e1000->tx_ring.tail = tail;
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e1000_outl(e1000, E1000_TDT, tail);
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/* Enable Tx interrupts */
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/* Setup the TX timeout watchdog (perhaps restarting the timer) */
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wd_start(e1000->txtimeout, E1000_TXTIMEOUT, e1000_txtimeout, 1, (uint32_t)e1000);
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return OK;
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}
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/****************************************************************************
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* Function: e1000_uiptxpoll
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*
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* Description:
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* The transmitter is available, check if uIP has any outgoing packets ready
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* to send. This is a callback from uip_poll(). uip_poll() may be called:
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*
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* 1. When the preceding TX packet send is complete,
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* 2. When the preceding TX packet send timesout and the interface is reset
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* 3. During normal TX polling
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*
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* Parameters:
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* dev - Reference to the NuttX driver state structure
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*
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* Returned Value:
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* OK on success; a negated errno on failure
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*
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* Assumptions:
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* May or may not be called from an interrupt handler. In either case,
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* global interrupts are disabled, either explicitly or indirectly through
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* interrupt handling logic.
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*
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****************************************************************************/
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static int e1000_uiptxpoll(struct uip_driver_s *dev)
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{
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struct e1000_dev *e1000 = (struct e1000_dev *)dev->d_private;
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int tail = e1000->tx_ring.tail;
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/* If the polling resulted in data that should be sent out on the network,
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* the field d_len is set to a value > 0.
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*/
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if (e1000->uip_dev.d_len > 0) {
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uip_arp_out(&e1000->uip_dev);
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e1000_transmit(e1000);
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/* Check if there is room in the device to hold another packet. If not,
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* return a non-zero value to terminate the poll.
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*/
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if (!e1000->tx_ring.desc[tail].desc_status)
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return -1;
|
|
}
|
|
|
|
/* If zero is returned, the polling will continue until all connections have
|
|
* been examined.
|
|
*/
|
|
|
|
return 0;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Function: e1000_receive
|
|
*
|
|
* Description:
|
|
* An interrupt was received indicating the availability of a new RX packet
|
|
*
|
|
* Parameters:
|
|
* e1000 - Reference to the driver state structure
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* Global interrupts are disabled by interrupt handling logic.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void e1000_receive(struct e1000_dev *e1000)
|
|
{
|
|
int head = e1000->rx_ring.head;
|
|
unsigned char *cp = (unsigned char *)
|
|
(e1000->rx_ring.buf + head * CONFIG_E1000_BUFF_SIZE);
|
|
int cnt;
|
|
|
|
while (e1000->rx_ring.desc[head].desc_status) {
|
|
|
|
/* Check for errors and update statistics */
|
|
|
|
// Here we do not handle packets that exceed packet-buffer size
|
|
if ((e1000->rx_ring.desc[head].desc_status & 3) == 1) {
|
|
cprintf("NIC READ: Oversized packet\n");
|
|
goto next;
|
|
}
|
|
|
|
/* Check if the packet is a valid size for the uIP buffer configuration */
|
|
|
|
// get the number of actual data-bytes in this packet
|
|
cnt = e1000->rx_ring.desc[head].packet_length;
|
|
|
|
if (cnt > CONFIG_NET_BUFSIZE || cnt < 14) {
|
|
cprintf("NIC READ: invalid package size\n");
|
|
goto next;
|
|
}
|
|
|
|
/* Copy the data data from the hardware to e1000->uip_dev.d_buf. Set
|
|
* amount of data in e1000->uip_dev.d_len
|
|
*/
|
|
|
|
// now we try to copy these data-bytes to the UIP buffer
|
|
memcpy(e1000->uip_dev.d_buf, cp, cnt);
|
|
e1000->uip_dev.d_len = cnt;
|
|
|
|
/* We only accept IP packets of the configured type and ARP packets */
|
|
|
|
#ifdef CONFIG_NET_IPv6
|
|
if (BUF->type == HTONS(UIP_ETHTYPE_IP6))
|
|
#else
|
|
if (BUF->type == HTONS(UIP_ETHTYPE_IP))
|
|
#endif
|
|
{
|
|
uip_arp_ipin(&e1000->uip_dev);
|
|
uip_input(&e1000->uip_dev);
|
|
|
|
/* If the above function invocation resulted in data that should be
|
|
* sent out on the network, the field d_len will set to a value > 0.
|
|
*/
|
|
|
|
if (e1000->uip_dev.d_len > 0) {
|
|
uip_arp_out(&e1000->uip_dev);
|
|
e1000_transmit(e1000);
|
|
}
|
|
}
|
|
else if (BUF->type == htons(UIP_ETHTYPE_ARP)) {
|
|
uip_arp_arpin(&e1000->uip_dev);
|
|
|
|
/* If the above function invocation resulted in data that should be
|
|
* sent out on the network, the field d_len will set to a value > 0.
|
|
*/
|
|
|
|
if (e1000->uip_dev.d_len > 0) {
|
|
e1000_transmit(e1000);
|
|
}
|
|
}
|
|
|
|
next:
|
|
e1000->rx_ring.desc[head].desc_status = 0;
|
|
e1000->rx_ring.head = (head + 1) % CONFIG_E1000_N_RX_DESC;
|
|
e1000->rx_ring.free++;
|
|
head = e1000->rx_ring.head;
|
|
cp = (unsigned char *)(e1000->rx_ring.buf + head * CONFIG_E1000_BUFF_SIZE);
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Function: e1000_txtimeout
|
|
*
|
|
* Description:
|
|
* Our TX watchdog timed out. Called from the timer interrupt handler.
|
|
* The last TX never completed. Reset the hardware and start again.
|
|
*
|
|
* Parameters:
|
|
* argc - The number of available arguments
|
|
* arg - The first argument
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* Global interrupts are disabled by the watchdog logic.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void e1000_txtimeout(int argc, uint32_t arg, ...)
|
|
{
|
|
struct e1000_dev *e1000 = (struct e1000_dev *)arg;
|
|
|
|
/* Increment statistics and dump debug info */
|
|
|
|
/* Then reset the hardware */
|
|
e1000_init(e1000);
|
|
|
|
/* Then poll uIP for new XMIT data */
|
|
|
|
(void)uip_poll(&e1000->uip_dev, e1000_uiptxpoll);
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Function: e1000_polltimer
|
|
*
|
|
* Description:
|
|
* Periodic timer handler. Called from the timer interrupt handler.
|
|
*
|
|
* Parameters:
|
|
* argc - The number of available arguments
|
|
* arg - The first argument
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* Global interrupts are disabled by the watchdog logic.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void e1000_polltimer(int argc, uint32_t arg, ...)
|
|
{
|
|
struct e1000_dev *e1000 = (struct e1000_dev *)arg;
|
|
int tail = e1000->tx_ring.tail;
|
|
|
|
/* Check if there is room in the send another TX packet. We cannot perform
|
|
* the TX poll if he are unable to accept another packet for transmission.
|
|
*/
|
|
if (!e1000->tx_ring.desc[tail].desc_status)
|
|
return;
|
|
|
|
/* If so, update TCP timing states and poll uIP for new XMIT data. Hmmm..
|
|
* might be bug here. Does this mean if there is a transmit in progress,
|
|
* we will missing TCP time state updates?
|
|
*/
|
|
|
|
(void)uip_timer(&e1000->uip_dev, e1000_uiptxpoll, E1000_POLLHSEC);
|
|
|
|
/* Setup the watchdog poll timer again */
|
|
|
|
(void)wd_start(e1000->txpoll, E1000_WDDELAY, e1000_polltimer, 1, arg);
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Function: e1000_ifup
|
|
*
|
|
* Description:
|
|
* NuttX Callback: Bring up the Ethernet interface when an IP address is
|
|
* provided
|
|
*
|
|
* Parameters:
|
|
* dev - Reference to the NuttX driver state structure
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int e1000_ifup(struct uip_driver_s *dev)
|
|
{
|
|
struct e1000_dev *e1000 = (struct e1000_dev *)dev->d_private;
|
|
|
|
ndbg("Bringing up: %d.%d.%d.%d\n",
|
|
dev->d_ipaddr & 0xff, (dev->d_ipaddr >> 8) & 0xff,
|
|
(dev->d_ipaddr >> 16) & 0xff, dev->d_ipaddr >> 24 );
|
|
|
|
/* Initialize PHYs, the Ethernet interface, and setup up Ethernet interrupts */
|
|
e1000_init(e1000);
|
|
|
|
/* Set and activate a timer process */
|
|
|
|
(void)wd_start(e1000->txpoll, E1000_WDDELAY, e1000_polltimer, 1, (uint32_t)e1000);
|
|
|
|
if (e1000_inl(e1000, E1000_STATUS) & 2)
|
|
e1000->bifup = true;
|
|
else
|
|
e1000->bifup = false;
|
|
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Function: e1000_ifdown
|
|
*
|
|
* Description:
|
|
* NuttX Callback: Stop the interface.
|
|
*
|
|
* Parameters:
|
|
* dev - Reference to the NuttX driver state structure
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int e1000_ifdown(struct uip_driver_s *dev)
|
|
{
|
|
struct e1000_dev *e1000 = (struct e1000_dev *)dev->d_private;
|
|
irqstate_t flags;
|
|
|
|
/* Disable the Ethernet interrupt */
|
|
|
|
flags = irqsave();
|
|
|
|
e1000_turn_off(e1000);
|
|
|
|
/* Cancel the TX poll timer and TX timeout timers */
|
|
|
|
wd_cancel(e1000->txpoll);
|
|
wd_cancel(e1000->txtimeout);
|
|
|
|
/* Put the the EMAC is its reset, non-operational state. This should be
|
|
* a known configuration that will guarantee the skel_ifup() always
|
|
* successfully brings the interface back up.
|
|
*/
|
|
//e1000_reset(e1000);
|
|
|
|
/* Mark the device "down" */
|
|
|
|
e1000->bifup = false;
|
|
irqrestore(flags);
|
|
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Function: e1000_txavail
|
|
*
|
|
* Description:
|
|
* Driver callback invoked when new TX data is available. This is a
|
|
* stimulus perform an out-of-cycle poll and, thereby, reduce the TX
|
|
* latency.
|
|
*
|
|
* Parameters:
|
|
* dev - Reference to the NuttX driver state structure
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
* Called in normal user mode
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int e1000_txavail(struct uip_driver_s *dev)
|
|
{
|
|
struct e1000_dev *e1000 = (struct e1000_dev *)dev->d_private;
|
|
int tail = e1000->tx_ring.tail;
|
|
irqstate_t flags;
|
|
|
|
/* Disable interrupts because this function may be called from interrupt
|
|
* level processing.
|
|
*/
|
|
|
|
flags = irqsave();
|
|
|
|
/* Ignore the notification if the interface is not yet up */
|
|
|
|
if (e1000->bifup) {
|
|
/* Check if there is room in the hardware to hold another outgoing packet. */
|
|
if (e1000->tx_ring.desc[tail].desc_status)
|
|
(void)uip_poll(&e1000->uip_dev, e1000_uiptxpoll);
|
|
}
|
|
|
|
irqrestore(flags);
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Function: e1000_addmac
|
|
*
|
|
* Description:
|
|
* NuttX Callback: Add the specified MAC address to the hardware multicast
|
|
* address filtering
|
|
*
|
|
* Parameters:
|
|
* dev - Reference to the NuttX driver state structure
|
|
* mac - The MAC address to be added
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_IGMP
|
|
static int e1000_addmac(struct uip_driver_s *dev, const uint8_t *mac)
|
|
{
|
|
struct e1000_dev *e1000 = (struct e1000_dev *)dev->d_private;
|
|
|
|
/* Add the MAC address to the hardware multicast routing table */
|
|
|
|
return OK;
|
|
}
|
|
#endif
|
|
|
|
/****************************************************************************
|
|
* Function: e1000_rmmac
|
|
*
|
|
* Description:
|
|
* NuttX Callback: Remove the specified MAC address from the hardware multicast
|
|
* address filtering
|
|
*
|
|
* Parameters:
|
|
* dev - Reference to the NuttX driver state structure
|
|
* mac - The MAC address to be removed
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
* Assumptions:
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_NET_IGMP
|
|
static int e1000_rmmac(struct uip_driver_s *dev, const uint8_t *mac)
|
|
{
|
|
struct e1000_dev *e1000 = (struct e1000_dev *)dev->d_private;
|
|
|
|
/* Add the MAC address to the hardware multicast routing table */
|
|
|
|
return OK;
|
|
}
|
|
#endif
|
|
|
|
irqreturn_t e1000_interrupt_handler(struct Trapframe *tf, void *dev_id)
|
|
{
|
|
struct e1000_dev *e1000 = (struct e1000_dev *)dev_id;
|
|
|
|
/* Get and clear interrupt status bits */
|
|
int intr_cause = e1000_inl(e1000, E1000_ICR);
|
|
e1000_outl(e1000, E1000_ICR, intr_cause);
|
|
|
|
// not for me
|
|
if (intr_cause == 0)
|
|
return IRQ_NONE;
|
|
|
|
/* Handle interrupts according to status bit settings */
|
|
|
|
// Link status change
|
|
if (intr_cause & (1<<2)) {
|
|
if (e1000_inl(e1000, E1000_STATUS) & 2)
|
|
e1000->bifup = true;
|
|
else
|
|
e1000->bifup = false;
|
|
}
|
|
|
|
/* Check if we received an incoming packet, if so, call skel_receive() */
|
|
|
|
// Rx-descriptor Timer expired
|
|
if (intr_cause & (1<<7))
|
|
e1000_receive(e1000);
|
|
|
|
// Tx queue empty
|
|
if (intr_cause & (1<<1))
|
|
wd_cancel(e1000->txtimeout);
|
|
|
|
/* Check is a packet transmission just completed. If so, call skel_txdone.
|
|
* This may disable further Tx interrupts if there are no pending
|
|
* tansmissions.
|
|
*/
|
|
|
|
// Tx-descriptor Written back
|
|
if (intr_cause & (1<<0))
|
|
uip_poll(&e1000->uip_dev, e1000_uiptxpoll);
|
|
|
|
|
|
// Rx-Descriptors Low
|
|
if (intr_cause & (1<<4)) {
|
|
int tail;
|
|
tail = e1000->rx_ring.tail + e1000->rx_ring.free;
|
|
tail %= CONFIG_E1000_N_RX_DESC;
|
|
e1000->rx_ring.tail = tail;
|
|
e1000->rx_ring.free = 0;
|
|
e1000_outl(e1000, E1000_RDT, tail);
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/******************************* PCI driver *********************************/
|
|
|
|
static pci_id_t e1000_id_table[] = {
|
|
{.sep = {INTEL_VENDERID, E1000_82573L}},
|
|
{.sep = {INTEL_VENDERID, E1000_82540EM}},
|
|
{.sep = {INTEL_VENDERID, E1000_82574L}},
|
|
{.sep = {INTEL_VENDERID, E1000_82567LM}},
|
|
{.sep = {INTEL_VENDERID, E1000_82541PI}},
|
|
{.sep = {0,0}}
|
|
};
|
|
|
|
static int e1000_probe(uint16_t addr, pci_id_t id)
|
|
{
|
|
uint32_t mmio_base, mmio_size;
|
|
uint32_t pci_cmd, size;
|
|
int err, irq, flags;
|
|
void *kmem, *omem;
|
|
struct e1000_dev *dev;
|
|
|
|
// alloc e1000_dev memory
|
|
dev = kzalloc(sizeof(struct e1000_dev));
|
|
if (dev == NULL)
|
|
return -1;
|
|
|
|
// enable device
|
|
err = pci_enable_device(addr, PCI_RESOURCE_MEM);
|
|
if (err)
|
|
goto error;
|
|
|
|
// get e1000 device type
|
|
dev->pci_dev_id = id.join;
|
|
|
|
// remap the controller's i/o-memory into kernel's address-space
|
|
mmio_base = pci_resource_start(addr, 0);
|
|
mmio_size = pci_resource_len(addr, 0);
|
|
err = rgmp_memmap_nocache(mmio_base, mmio_size, mmio_base);
|
|
if (err)
|
|
goto error;
|
|
dev->phy_mem_base = mmio_base;
|
|
dev->io_mem_base = mmio_base;
|
|
dev->mem_size = mmio_size;
|
|
|
|
// make sure the controller's Bus Master capability is enabled
|
|
pci_cmd = pci_config_readl(addr, PCI_COMMAND);
|
|
pci_cmd |= (1<<2);
|
|
pci_config_writel(addr, PCI_COMMAND, pci_cmd);
|
|
|
|
// MAC address
|
|
memset(dev->dst_mac, 0xFF, 6);
|
|
memcpy(dev->src_mac, (void *)(dev->io_mem_base+E1000_RA), 6);
|
|
|
|
// get e1000 IRQ
|
|
flags = 0;
|
|
irq = pci_enable_msi(addr);
|
|
if (irq == 0) {
|
|
irq = pci_read_irq(addr);
|
|
flags |= IDC_SHARE;
|
|
}
|
|
dev->irq = irq;
|
|
dev->int_desc.handler = e1000_interrupt_handler;
|
|
dev->int_desc.dev_id = dev;
|
|
err = rgmp_request_irq(irq, &dev->int_desc, flags);
|
|
if (err)
|
|
goto err0;
|
|
|
|
// Here we alloc a big block of memory once and make it
|
|
// aligned to page boundary and multiple of page size. This
|
|
// is because the memory can be modified by E1000 DMA and
|
|
// should be mapped no-cache which will hugely reduce memory
|
|
// access performance. The page size alloc will restrict
|
|
// this bad effect only within the memory we alloc here.
|
|
size = CONFIG_E1000_N_TX_DESC * sizeof(struct tx_desc) +
|
|
CONFIG_E1000_N_TX_DESC * CONFIG_E1000_BUFF_SIZE +
|
|
CONFIG_E1000_N_RX_DESC * sizeof(struct rx_desc) +
|
|
CONFIG_E1000_N_RX_DESC * CONFIG_E1000_BUFF_SIZE;
|
|
size = ROUNDUP(size, PGSIZE);
|
|
omem = kmem = memalign(PGSIZE, size);
|
|
if (kmem == NULL) {
|
|
err = -ENOMEM;
|
|
goto err1;
|
|
}
|
|
rgmp_memremap_nocache((uintptr_t)kmem, size);
|
|
|
|
// alloc memory for tx ring
|
|
dev->tx_ring.desc = (struct tx_desc*)kmem;
|
|
kmem += CONFIG_E1000_N_TX_DESC * sizeof(struct tx_desc);
|
|
dev->tx_ring.buf = kmem;
|
|
kmem += CONFIG_E1000_N_TX_DESC * CONFIG_E1000_BUFF_SIZE;
|
|
|
|
// alloc memory for rx rings
|
|
dev->rx_ring.desc = (struct rx_desc*)kmem;
|
|
kmem += CONFIG_E1000_N_RX_DESC * sizeof(struct rx_desc);
|
|
dev->rx_ring.buf = kmem;
|
|
|
|
/* Initialize the driver structure */
|
|
|
|
dev->uip_dev.d_ifup = e1000_ifup; /* I/F up (new IP address) callback */
|
|
dev->uip_dev.d_ifdown = e1000_ifdown; /* I/F down callback */
|
|
dev->uip_dev.d_txavail = e1000_txavail; /* New TX data callback */
|
|
#ifdef CONFIG_NET_IGMP
|
|
dev->uip_dev.d_addmac = e1000_addmac; /* Add multicast MAC address */
|
|
dev->uip_dev.d_rmmac = e1000_rmmac; /* Remove multicast MAC address */
|
|
#endif
|
|
dev->uip_dev.d_private = dev; /* Used to recover private state from dev */
|
|
|
|
/* Create a watchdog for timing polling for and timing of transmisstions */
|
|
|
|
dev->txpoll = wd_create(); /* Create periodic poll timer */
|
|
dev->txtimeout = wd_create(); /* Create TX timeout timer */
|
|
|
|
// Put the interface in the down state.
|
|
// e1000 reset
|
|
e1000_reset(dev);
|
|
|
|
/* Read the MAC address from the hardware */
|
|
memcpy(dev->uip_dev.d_mac.ether_addr_octet, (void *)(dev->io_mem_base+E1000_RA), 6);
|
|
|
|
/* Register the device with the OS so that socket IOCTLs can be performed */
|
|
err = netdev_register(&dev->uip_dev);
|
|
if (err)
|
|
goto err2;
|
|
|
|
// insert into e1000_list
|
|
dev->next = e1000_list.next;
|
|
e1000_list.next = dev;
|
|
cprintf("bring up e1000 device: %04x %08x\n", addr, id.join);
|
|
|
|
return 0;
|
|
|
|
err2:
|
|
rgmp_memremap((uintptr_t)omem, size);
|
|
free(omem);
|
|
err1:
|
|
rgmp_free_irq(irq, &dev->int_desc);
|
|
err0:
|
|
rgmp_memunmap(mmio_base, mmio_size);
|
|
error:
|
|
kfree(dev);
|
|
cprintf("e1000 device probe fail: %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
void e1000_mod_init(void)
|
|
{
|
|
pci_probe_device(e1000_id_table, e1000_probe);
|
|
}
|
|
|
|
void e1000_mod_exit(void)
|
|
{
|
|
uint32_t size;
|
|
struct e1000_dev *dev;
|
|
|
|
size = CONFIG_E1000_N_TX_DESC * sizeof(struct tx_desc) +
|
|
CONFIG_E1000_N_TX_DESC * CONFIG_E1000_BUFF_SIZE +
|
|
CONFIG_E1000_N_RX_DESC * sizeof(struct rx_desc) +
|
|
CONFIG_E1000_N_RX_DESC * CONFIG_E1000_BUFF_SIZE;
|
|
size = ROUNDUP(size, PGSIZE);
|
|
|
|
for (dev=e1000_list.next; dev!=NULL; dev=dev->next) {
|
|
netdev_unregister(&dev->uip_dev);
|
|
e1000_reset(dev);
|
|
wd_delete(dev->txpoll);
|
|
wd_delete(dev->txtimeout);
|
|
rgmp_memremap((uintptr_t)dev->tx_ring.desc, size);
|
|
free(dev->tx_ring.desc);
|
|
rgmp_free_irq(dev->irq, &dev->int_desc);
|
|
rgmp_memunmap((uintptr_t)dev->io_mem_base, dev->mem_size);
|
|
kfree(dev);
|
|
}
|
|
|
|
e1000_list.next = NULL;
|
|
}
|