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apache / nuttx / ca5a9c711a7b9b70d84385a8523c54cf58a24e9e / . / arch / arm / src / lpc43xx / lpc43_ethernet.c
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/****************************************************************************
* arch/arm/src/lpc43xx/lpc43_ethernet.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#if defined(CONFIG_NET) && defined(CONFIG_LPC43_ETHERNET)
#include <inttypes.h>
#include <stdint.h>
#include <stdbool.h>
#include <time.h>
#include <string.h>
#include <assert.h>
#include <debug.h>
#include <errno.h>
#include <arpa/inet.h>
#include <nuttx/arch.h>
#include <nuttx/irq.h>
#include <nuttx/queue.h>
#include <nuttx/wdog.h>
#include <nuttx/wqueue.h>
#include <nuttx/net/mii.h>
#include <nuttx/net/ip.h>
#include <nuttx/net/netdev.h>
#if defined(CONFIG_NET_PKT)
# include <nuttx/net/pkt.h>
#endif
#include "arm_internal.h"
#include "chip.h"
#include "lpc43_pinconfig.h"
#include "lpc43_ethernet.h"
#include "hardware/lpc43_creg.h"
#include "hardware/lpc43_cgu.h"
#include "hardware/lpc43_ccu.h"
#include "lpc43_rgu.h"
#include "lpc43_gpio.h"
#include <arch/board/board.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
/* If processing is not done at the interrupt level, then work queue support
* is required.
*/
#if !defined(CONFIG_SCHED_WORKQUEUE)
# error Work queue support is required
#endif
/* The low priority work queue is preferred. If it is not enabled, LPWORK
* will be the same as HPWORK.
*
* NOTE: However, the network should NEVER run on the high priority work
* queue! That queue is intended only to service short back end interrupt
* processing that never suspends. Suspending the high priority work queue
* may bring the system to its knees!
*/
#define ETHWORK LPWORK
#ifndef CONFIG_LPC43_PHYADDR
# error "CONFIG_LPC43_PHYADDR must be defined in the NuttX configuration"
#endif
#if !defined(CONFIG_LPC43_MII) && !defined(CONFIG_LPC43_RMII)
# warning "Neither CONFIG_LPC43_MII nor CONFIG_LPC43_RMII defined"
#endif
#if defined(CONFIG_LPC43_MII) && defined(CONFIG_LPC43_RMII)
# error "Both CONFIG_LPC43_MII and CONFIG_LPC43_RMII defined"
#endif
#ifdef CONFIG_LPC43_AUTONEG
# ifndef CONFIG_LPC43_PHYSR
# error "CONFIG_LPC43_PHYSR must be defined in the NuttX configuration"
# endif
# ifdef CONFIG_LPC43_PHYSR_ALTCONFIG
# ifndef CONFIG_LPC43_PHYSR_ALTMODE
# error "CONFIG_LPC43_PHYSR_ALTMODE must be defined in the NuttX configuration"
# endif
# ifndef CONFIG_LPC43_PHYSR_10HD
# error "CONFIG_LPC43_PHYSR_10HD must be defined in the NuttX configuration"
# endif
# ifndef CONFIG_LPC43_PHYSR_100HD
# error "CONFIG_LPC43_PHYSR_100HD must be defined in the NuttX configuration"
# endif
# ifndef CONFIG_LPC43_PHYSR_10FD
# error "CONFIG_LPC43_PHYSR_10FD must be defined in the NuttX configuration"
# endif
# ifndef CONFIG_LPC43_PHYSR_100FD
# error "CONFIG_LPC43_PHYSR_100FD must be defined in the NuttX configuration"
# endif
# else
# ifndef CONFIG_LPC43_PHYSR_SPEED
# error "CONFIG_LPC43_PHYSR_SPEED must be defined in the NuttX configuration"
# endif
# ifndef CONFIG_LPC43_PHYSR_100MBPS
# error "CONFIG_LPC43_PHYSR_100MBPS must be defined in the NuttX configuration"
# endif
# ifndef CONFIG_LPC43_PHYSR_MODE
# error "CONFIG_LPC43_PHYSR_MODE must be defined in the NuttX configuration"
# endif
# ifndef CONFIG_LPC43_PHYSR_FULLDUPLEX
# error "CONFIG_LPC43_PHYSR_FULLDUPLEX must be defined in the NuttX configuration"
# endif
# endif
#endif
#ifdef CONFIG_LPC43_ETH_PTP
# warning "CONFIG_LPC43_ETH_PTP is not yet supported"
#endif
/* This driver does not use enhanced descriptors. Enhanced descriptors must
* be used, however, if time stamping or and/or IPv4 checksum offload is
* supported.
*/
#undef CONFIG_LPC43_ETH_ENHANCEDDESC
#undef CONFIG_LPC43_ETH_HWCHECKSUM
/* Add 4 to the configured buffer size to account for the 2 byte checksum
* memory needed at the end of the maximum size packet. Buffer sizes must
* be an even multiple of 4, 8, or 16 bytes (depending on buswidth). We
* will use the 16-byte alignment in all cases.
*/
#define OPTIMAL_ETH_BUFSIZE ((CONFIG_NET_ETH_PKTSIZE + 4 + 15) & ~15)
#ifndef CONFIG_LPC43_ETH_BUFSIZE
# define CONFIG_LPC43_ETH_BUFSIZE OPTIMAL_ETH_BUFSIZE
#endif
#if CONFIG_LPC43_ETH_BUFSIZE > ETH_TDES1_TBS1_MASK
# error "CONFIG_LPC43_ETH_BUFSIZE is too large"
#endif
#if (CONFIG_LPC43_ETH_BUFSIZE & 15) != 0
# error "CONFIG_LPC43_ETH_BUFSIZE must be aligned"
#endif
#if CONFIG_LPC43_ETH_BUFSIZE != OPTIMAL_ETH_BUFSIZE
# warning "You using an incomplete/untested configuration"
#endif
#ifndef CONFIG_LPC43_ETH_NRXDESC
# define CONFIG_LPC43_ETH_NRXDESC 8
#endif
#ifndef CONFIG_LPC43_ETH_NTXDESC
# define CONFIG_LPC43_ETH_NTXDESC 4
#endif
/* We need at least one more free buffer than transmit buffers */
#define LPC43_ETH_NFREEBUFFERS (CONFIG_LPC43_ETH_NTXDESC+1)
/* Extremely detailed register debug that you would normally never want
* enabled.
*/
#ifndef CONFIG_DEBUG_NET_INFO
# undef CONFIG_LPC43_ETHMAC_REGDEBUG
#endif
/* Clocking *****************************************************************/
/* Set MACMIIAR CR bits depending on HCLK setting */
#if BOARD_FCLKOUT_FREQUENCY >= 20000000 && BOARD_FCLKOUT_FREQUENCY < 35000000
# define ETH_MACMIIA_CR ETH_MACMIIA_CR_20_35
#elif BOARD_FCLKOUT_FREQUENCY >= 35000000 && BOARD_FCLKOUT_FREQUENCY < 60000000
# define ETH_MACMIIA_CR ETH_MACMIIA_CR_35_60
#elif BOARD_FCLKOUT_FREQUENCY >= 60000000 && BOARD_FCLKOUT_FREQUENCY < 100000000
# define ETH_MACMIIA_CR ETH_MACMIIA_CR_60_100
#elif BOARD_FCLKOUT_FREQUENCY >= 100000000 && BOARD_FCLKOUT_FREQUENCY < 150000000
# define ETH_MACMIIA_CR ETH_MACMIIA_CR_100_150
#elif BOARD_FCLKOUT_FREQUENCY >= 150000000 && BOARD_FCLKOUT_FREQUENCY <= 250000000
# define ETH_MACMIIA_CR ETH_MACMIIA_CR_150_250
#elif BOARD_FCLKOUT_FREQUENCY >= 250000000 && BOARD_FCLKOUT_FREQUENCY <= 350000000
# define ETH_MACMIIA_CR ETH_MACMIIA_CR_250_300
#else
# error "BOARD_FCLKOUT_FREQUENCY not supportable"
#endif
/* Timing *******************************************************************/
/* TX timeout = 1 minute */
#define LPC43_TXTIMEOUT (60*CLK_TCK)
/* PHY reset/configuration delays in milliseconds */
#define PHY_RESET_DELAY (65)
#define PHY_CONFIG_DELAY (1000)
/* PHY read/write delays in loop counts */
#define PHY_READ_TIMEOUT (0x0004ffff)
#define PHY_WRITE_TIMEOUT (0x0004ffff)
#define PHY_RETRY_TIMEOUT (0x0004ffff)
/* Register values **********************************************************/
/* Clear the MACCR bits that will be setup during MAC initialization (or that
* are cleared unconditionally). Per the reference manual, all reserved bits
* must be retained at their reset value.
*
* ETH_MACCFG_RE Bit 2: Receiver enable
* ETH_MACCFG_TE Bit 3: Transmitter enable
* ETH_MACCFG_DC Bit 4: Deferral check
* ETH_MACCFG_BL Bits 5-6: Back-off limit
* ETH_MACCFG_APCS Bit 7: Automatic pad/CRC stripping
* ETH_MACCFG_RD Bit 9: Retry disable
* ETH_MACCFG_DM Bit 11: Duplex mode
* ETH_MACCFG_LM Bit 12: Loopback mode
* ETH_MACCFG_DO Bit 13: Receive own disable
* ETH_MACCFG_FES Bit 14: Fast Ethernet speed
* ETH_MACCFG_CSD Bit 16: Carrier sense disable
* ETH_MACCFG_IFG Bits 17-19: Interframe gap
* ETH_MACCFG_JD Bit 22: Jabber disable
* ETH_MACCFG_WD Bit 23: Watchdog disable
* ETH_MACCFG_CSTF Bits 25: CRC stripping for Type frames (F2/F4 only)
*/
#define MACCR_CLEAR_BITS \
(ETH_MACCFG_RE | ETH_MACCFG_TE | ETH_MACCFG_DF | ETH_MACCFG_BL_MASK | \
ETH_MACCFG_ACS | ETH_MACCFG_RD | ETH_MACCFG_DM | \
ETH_MACCFG_LM | ETH_MACCFG_DO | ETH_MACCFG_FES | ETH_MACCFG_DCRS | \
ETH_MACCFG_JE | ETH_MACCFG_IFG_MASK | ETH_MACCFG_JD | ETH_MACCFG_WD)
/* The following bits are set or left zero unconditionally in all modes.
*
* ETH_MACCFG_RE Receiver enable 0 (disabled)
* ETH_MACCFG_TE Transmitter enable 0 (disabled)
* ETH_MACCFG_DC Deferral check 0 (disabled)
* ETH_MACCFG_BL Back-off limit 0 (10)
* ETH_MACCFG_APCS Automatic pad/CRC stripping 0 (disabled)
* ETH_MACCFG_RD Retry disable 1 (disabled)
* ETH_MACCFG_LM Loopback mode 0 (disabled)
* ETH_MACCFG_ROD Receive own disable 0 (enabled)
* ETH_MACCFG_CSD Carrier sense disable 0 (enabled)
* ETH_MACCFG_IFG Interframe gap 0 (96 bits)
* ETH_MACCFG_JD Jabber disable 0 (enabled)
* ETH_MACCFG_WD Watchdog disable 0 (enabled)
* ETH_MACCFG_CSTF CRC stripping for Type frames 0 (disabled, F2/F4 only)
*
* The following are set conditioinally based on mode and speed.
*
* ETH_MACCFG_DM Duplex mode Depends on priv->fduplex
* ETH_MACCFG_FES Fast Ethernet speed Depends on priv->mbps100
*/
# define MACCR_SET_BITS \
(ETH_MACCFG_BL_10 | ETH_MACCFG_RD | ETH_MACCFG_IFG(96))
/* Clear the MACCR bits that will be setup during MAC initialization (or that
* are cleared unconditionally). Per the reference manual, all reserved bits
* must be retained at their reset value.
*
* ETH_MACFFR_PM Bit 0: Promiscuous mode
* ETH_MACFFR_HU Bit 1: Hash unicast
* ETH_MACFFR_HM Bit 2: Hash multicast
* ETH_MACFFR_DAIF Bit 3: Destination address inverse filtering
* ETH_MACFFR_PAM Bit 4: Pass all multicast
* ETH_MACFFR_BFD Bit 5: Broadcast frames disable
* ETH_MACFFR_PCF Bits 6-7: Pass control frames
* ETH_MACFFR_SAIF Bit 8: Source address inverse filtering
* ETH_MACFFR_SAF Bit 9: Source address filter
* ETH_MACFFR_HPF Bit 10: Hash or perfect filter
* ETH_MACFFR_RA Bit 31: Receive all
*/
#define MACFFR_CLEAR_BITS \
(ETH_MACFFLT_PR | ETH_MACFFLT_HUC | ETH_MACFFLT_HMC | ETH_MACFFLT_DAIF | \
ETH_MACFFLT_PM | ETH_MACFFLT_DBF | ETH_MACFFLT_PCF_MASK | ETH_MACFFLT_HPF | \
ETH_MACFFLT_RA)
/* The following bits are set or left zero unconditionally in all modes.
*
* ETH_MACFFLT_PM Promiscuous mode 0 (disabled)
* ETH_MACFFLT_HU Hash unicast 0 (perfect dest filtering)
* ETH_MACFFLT_HM Hash multicast 0 (perfect dest filtering)
* ETH_MACFFLT_DAIF Destination address 0 (normal)
* inverse filtering
* ETH_MACFFLT_PAM Pass all multicast 0 (Depends on HM bit)
* ETH_MACFFLT_BFD Broadcast frames disable 0 (enabled)
* ETH_MACFFLT_PCF Pass control frames 1 (block all but PAUSE)
* ETH_MACFFLT_HPF Hash or perfect filter 0 (Only matching frames passed)
* ETH_MACFFLT_RA Receive all 0 (disabled)
*/
#define MACFFR_SET_BITS (ETH_MACFFLT_PCF_PAUSE)
/* Clear the MACFCR bits that will be setup during MAC initialization (or
* that are cleared unconditionally). Per the reference manual, all reserved
* bits must be retained at their reset value.
*
* ETH_MACFCR_FCB_BPA Bit 0: Flow control busy/back pressure activate
* ETH_MACFCR_TFCE Bit 1: Transmit flow control enable
* ETH_MACFCR_RFCE Bit 2: Receive flow control enable
* ETH_MACFCR_UPFD Bit 3: Unicast pause frame detect
* ETH_MACFCR_PLT Bits 4-5: Pause low threshold
* ETH_MACFCR_ZQPD Bit 7: Zero-quanta pause disable
* ETH_MACFCR_PT Bits 16-31: Pause time
*/
#define MACFCR_CLEAR_MASK \
(ETH_MACFC_FCB | ETH_MACFC_TFE | ETH_MACFC_RFE | ETH_MACFC_UP | \
ETH_MACFC_PLT_MASK | ETH_MACFC_DZPQ | ETH_MACFC_PT_MASK)
/* The following bits are set or left zero unconditionally in all modes.
*
* ETH_MACFCR_FCB_BPA Flow control busy/back 0 (no pause control frame)
* activate pressure
* ETH_MACFCR_TFCE Transmit flow control enable 0 (disabled)
* ETH_MACFCR_RFCE Receive flow control enable 0 (disabled)
* ETH_MACFCR_UPFD Unicast pause frame detect 0 (disabled)
* ETH_MACFCR_PLT Pause low threshold 0 (pause time - 4)
* ETH_MACFCR_ZQPD Zero-quanta pause disable 1 (disabled)
* ETH_MACFCR_PT Pause time 0
*/
#define MACFCR_SET_MASK (ETH_MACFC_PLT(4) | ETH_MACFC_DZPQ)
/* Clear the DMAOMR bits that will be setup during MAC initialization (or
* that are cleared unconditionally). Per the reference manual, all reserved
* bits must be retained at their reset value.
*
* ETH_DMAOPMODE_SR Bit 1: Start/stop receive
* TH_DMAOMR_OSF Bit 2: Operate on second frame
* ETH_DMAOPMODE_RTC Bits 3-4: Receive threshold control
* ETH_DMAOPMODE_FUGF Bit 6: Forward undersized good frames
* ETH_DMAOPMODE_FEF Bit 7: Forward error frames
* ETH_DMAOPMODE_ST Bit 13: Start/stop transmission
* ETH_DMAOPMODE_TTC Bits 14-16: Transmit threshold control
* ETH_DMAOPMODE_FTF Bit 20: Flush transmit FIFO
* ETH_DMAOPMODE_TSF Bit 21: Transmit store and forward
* ETH_DMAOPMODE_DFRF Bit 24: Disable flushing of received frames
* ETH_DMAOPMODE_RSF Bit 25: Receive store and forward
* TH_DMAOMR_DTCEFD Bit 26: Dropping of TCP/IP checksum error
* frames disable
*/
#define DMAOMR_CLEAR_MASK \
(ETH_DMAOPMODE_SR | ETH_DMAOPMODE_OSF | ETH_DMAOPMODE_RTC_MASK | ETH_DMAOPMODE_FUF | \
ETH_DMAOPMODE_FEF | ETH_DMAOPMODE_ST | ETH_DMAOPMODE_TTC_MASK | ETH_DMAOPMODE_FTF | \
ETH_DMAOPMODE_DFF)
/* The following bits are set or left zero unconditionally in all modes.
*
* ETH_DMAOPMODE_SR Start/stop receive 0 (not running)
* TH_DMAOMR_OSF Operate on second frame 1 (enabled)
* ETH_DMAOPMODE_RTC Receive threshold control 0 (64 bytes)
* ETH_DMAOPMODE_FUGF Forward undersized good 0 (disabled)
* frames
* ETH_DMAOPMODE_FEF Forward error frames 0 (disabled)
* ETH_DMAOPMODE_ST Start/stop transmission 0 (not running)
* ETH_DMAOPMODE_TTC Transmit threshold control 0 (64 bytes)
* ETH_DMAOPMODE_FTF Flush transmit FIFO 0 (no flush)
* ETH_DMAOPMODE_TSF Transmit store and forward Depends on
* CONFIG_LPC43_ETH_HWCHECKSUM
* ETH_DMAOPMODE_DFRF Disable flushing of 0 (enabled)
* received frames
* ETH_DMAOPMODE_RSF Receive store and forward Depends on
* CONFIG_LPC43_ETH_HWCHECKSUM
* TH_DMAOMR_DTCEFD Dropping of TCP/IP checksum Depends on
* error frames disable CONFIG_LPC43_ETH_HWCHECKSUM
*
* When the checksum offload feature is enabled, we need to enable the Store
* and Forward mode: the store and forward guarantee that a whole frame is
* stored in the FIFO, so the MAC can insert/verify the checksum, if the
* checksum is OK the DMA can handle the frame otherwise the frame is dropped
*/
#ifdef CONFIG_LPC43_ETH_HWCHECKSUM
# define DMAOMR_SET_MASK \
(ETH_DMAOPMODE_OSF | ETH_DMAOPMODE_RTC_64 | ETH_DMAOPMODE_TTC_64 | \
ETH_DMAOPMODE_TSF | ETH_DMAOPMODE_RSF)
#else
# define DMAOMR_SET_MASK \
(ETH_DMAOPMODE_OSF | ETH_DMAOPMODE_RTC_64 | ETH_DMAOPMODE_TTC_64)
#endif
/* Clear the DMABMR bits that will be setup during MAC initialization (or
* that are cleared unconditionally). Per the reference manual, all reserved
* bits must be retained at their reset value.
*
* ETH_DMABMODE_SR Bit 0: Software reset
* ETH_DMABMODE_DA Bit 1: DMA Arbitration
* ETH_DMABMODE_DSL Bits 2-6: Descriptor skip length
* ETH_DMABMODE_ATDS Bit 7: Enhanced descriptor format enable
* ETH_DMABMODE_PBL Bits 8-13: Programmable burst length
* ETH_DMABMODE_RTPR Bits 14-15: RX TX priority ratio
* ETH_DMABMODE_FB Bit 16: Fixed burst
* ETH_DMABMODE_RDP Bits 17-22: RX DMA PBL
* ETH_DMABMODE_USP Bit 23: Use separate PBL
* ETH_DMABMODE_FPM Bit 24: 4xPBL mode
* ETH_DMABMODE_AAB Bit 25: Address-aligned beats
* ETH_DMABMODE_MB Bit 26: Mixed burst (F2/F4 only)
*/
#define DMABMR_CLEAR_MASK \
(ETH_DMABMODE_SWR | ETH_DMABMODE_DA | ETH_DMABMODE_DSL_MASK | ETH_DMABMODE_ATDS | \
ETH_DMABMODE_PBL_MASK | ETH_DMABMODE_PR_MASK | ETH_DMABMODE_FB | ETH_DMABMODE_RPBL_MASK | \
ETH_DMABMODE_USP | ETH_DMABMODE_PBL8X | ETH_DMABMODE_AAL | ETH_DMABMODE_MB | ETH_DMABMODE_TXPR)
/* The following bits are set or left zero unconditionally in all modes.
*
*
* ETH_DMABMODE_SR Software reset 0 (no reset)
* ETH_DMABMODE_DA DMA Arbitration 0 (round robin)
* ETH_DMABMODE_DSL Descriptor skip length 0
* ETH_DMABMODE_ATDS Enhanced descriptor format Depends on
* enable CONFIG_LPC43_ETH_ENHANCEDDESC
* ETH_DMABMODE_PBL Programmable burst length 32 beats
* ETH_DMABMODE_RTPR RX TX priority ratio 2:1
* ETH_DMABMODE_FB Fixed burst 1 (enabled)
* ETH_DMABMODE_RDP RX DMA PBL 32 beats
* ETH_DMABMODE_USP Use separate PBL 1 (enabled)
* ETH_DMABMODE_FPM 4xPBL mode 0 (disabled)
* ETH_DMABMODE_AAB Address-aligned beats 1 (enabled)
* ETH_DMABMODE_MB Mixed burst 0 (disabled, F2/F4 only)
*/
#ifdef CONFIG_LPC43_ETH_ENHANCEDDESC
# define DMABMR_SET_MASK \
(ETH_DMABMODE_DSL(0) | ETH_DMABMODE_PBL(32) | ETH_DMABMODE_ATDS | ETH_DMABMODE_RTPR_2TO1 | \
ETH_DMABMODE_FB | ETH_DMABMODE_RPBL(32) | ETH_DMABMODE_USP | ETH_DMABMODE_AAB)
#else
# define DMABMR_SET_MASK \
(ETH_DMABMODE_DSL(0) | ETH_DMABMODE_PBL(32) | ETH_DMABMODE_PR_2TO1 | ETH_DMABMODE_FB | \
ETH_DMABMODE_RPBL(32) | ETH_DMABMODE_USP | ETH_DMABMODE_AAL)
#endif
/* Interrupt bit sets *******************************************************/
/* All interrupts in the normal and abnormal interrupt summary. Early
* transmit interrupt (ETI) is excluded from the abnormal set because it
* causes too many interrupts and is not interesting.
*/
#define ETH_DMAINT_NORMAL \
(ETH_DMAINT_TI | ETH_DMAINT_TU | ETH_DMAINT_RI | ETH_DMAINT_ERI)
#define ETH_DMAINT_ABNORMAL \
(ETH_DMAINT_TPS | ETH_DMAINT_TJT | ETH_DMAINT_OVF | ETH_DMAINT_UNF | \
ETH_DMAINT_RU | ETH_DMAINT_RPS | ETH_DMAINT_RWT | /* ETH_DMAINT_ETI | */ \
ETH_DMAINT_FBI)
/* Normal receive, transmit, error interrupt enable bit sets */
#define ETH_DMAINT_RECV_ENABLE (ETH_DMAINT_NIS | ETH_DMAINT_RI)
#define ETH_DMAINT_XMIT_ENABLE (ETH_DMAINT_NIS | ETH_DMAINT_TI)
#define ETH_DMAINT_XMIT_DISABLE (ETH_DMAINT_TI)
#ifdef CONFIG_DEBUG_NET
# define ETH_DMAINT_ERROR_ENABLE (ETH_DMAINT_AIS | ETH_DMAINT_ABNORMAL)
#else
# define ETH_DMAINT_ERROR_ENABLE (0)
#endif
/* Helpers ******************************************************************/
/* This is a helper pointer for accessing the contents of the Ethernet
* header
*/
#define BUF ((struct eth_hdr_s *)priv->dev.d_buf)
/****************************************************************************
* Private Types
****************************************************************************/
/* The lpc43_ethmac_s encapsulates all state information for a single
* hardware interface
*/
struct lpc43_ethmac_s
{
uint8_t ifup : 1; /* true:ifup false:ifdown */
uint8_t mbps100 : 1; /* 100MBps operation (vs 10 MBps) */
uint8_t fduplex : 1; /* Full (vs. half) duplex */
struct wdog_s txtimeout; /* TX timeout timer */
struct work_s irqwork; /* For deferring work to the work queue */
struct work_s pollwork; /* For deferring work to the work queue */
/* This holds the information visible to the NuttX network */
struct net_driver_s dev; /* Interface understood by the network */
/* Used to track transmit and receive descriptors */
struct eth_txdesc_s *txhead; /* Next available TX descriptor */
struct eth_rxdesc_s *rxhead; /* Next available RX descriptor */
struct eth_txdesc_s *txtail; /* First "in_flight" TX descriptor */
struct eth_rxdesc_s *rxcurr; /* First RX descriptor of the segment */
uint16_t segments; /* RX segment count */
uint16_t inflight; /* Number of TX transfers "in_flight" */
sq_queue_t freeb; /* The free buffer list */
/* Descriptor allocations */
struct eth_rxdesc_s rxtable[CONFIG_LPC43_ETH_NRXDESC];
struct eth_txdesc_s txtable[CONFIG_LPC43_ETH_NTXDESC];
/* Buffer allocations */
uint8_t rxbuffer[CONFIG_LPC43_ETH_NRXDESC*CONFIG_LPC43_ETH_BUFSIZE];
uint8_t alloc[LPC43_ETH_NFREEBUFFERS*CONFIG_LPC43_ETH_BUFSIZE];
};
/****************************************************************************
* Private Data
****************************************************************************/
static struct lpc43_ethmac_s g_lpc43ethmac;
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* Register operations ******************************************************/
#ifdef CONFIG_LPC43_ETHMAC_REGDEBUG
static uint32_t lpc43_getreg(uint32_t addr);
static void lpc43_putreg(uint32_t val, uint32_t addr);
static void lpc43_checksetup(void);
#else
# define lpc43_getreg(addr) getreg32(addr)
# define lpc43_putreg(val,addr) putreg32(val,addr)
# define lpc43_checksetup()
#endif
/* Free buffer management */
static void lpc43_initbuffer(struct lpc43_ethmac_s *priv);
static inline uint8_t *lpc43_allocbuffer(struct lpc43_ethmac_s *priv);
static inline void lpc43_freebuffer(struct lpc43_ethmac_s *priv,
uint8_t *buffer);
static inline bool lpc43_isfreebuffer(struct lpc43_ethmac_s *priv);
/* Common TX logic */
static int lpc43_transmit(struct lpc43_ethmac_s *priv);
static int lpc43_txpoll(struct net_driver_s *dev);
static void lpc43_dopoll(struct lpc43_ethmac_s *priv);
/* Interrupt handling */
static void lpc43_enableint(struct lpc43_ethmac_s *priv,
uint32_t ierbit);
static void lpc43_disableint(struct lpc43_ethmac_s *priv,
uint32_t ierbit);
static void lpc43_freesegment(struct lpc43_ethmac_s *priv,
struct eth_rxdesc_s *rxfirst, int segments);
static int lpc43_recvframe(struct lpc43_ethmac_s *priv);
static void lpc43_receive(struct lpc43_ethmac_s *priv);
static void lpc43_freeframe(struct lpc43_ethmac_s *priv);
static void lpc43_txdone(struct lpc43_ethmac_s *priv);
static void lpc43_interrupt_work(void *arg);
static int lpc43_interrupt(int irq, void *context, void *arg);
/* Watchdog timer expirations */
static void lpc43_txtimeout_work(void *arg);
static void lpc43_txtimeout_expiry(wdparm_t arg);
/* NuttX callback functions */
static int lpc43_ifup(struct net_driver_s *dev);
static int lpc43_ifdown(struct net_driver_s *dev);
static void lpc43_txavail_work(void *arg);
static int lpc43_txavail(struct net_driver_s *dev);
#if defined(CONFIG_NET_MCASTGROUP) || defined(CONFIG_NET_ICMPv6)
static int lpc43_addmac(struct net_driver_s *dev, const uint8_t *mac);
#endif
#ifdef CONFIG_NET_MCASTGROUP
static int lpc43_rmmac(struct net_driver_s *dev, const uint8_t *mac);
#endif
#ifdef CONFIG_NETDEV_IOCTL
static int lpc43_ioctl(struct net_driver_s *dev, int cmd,
unsigned long arg);
#endif
/* Descriptor Initialization */
static void lpc43_txdescinit(struct lpc43_ethmac_s *priv);
static void lpc43_rxdescinit(struct lpc43_ethmac_s *priv);
/* PHY Initialization */
#if defined(CONFIG_NETDEV_PHY_IOCTL) && defined(CONFIG_ARCH_PHY_INTERRUPT)
static int lpc43_phyintenable(struct lpc43_ethmac_s *priv);
#endif
static int lpc43_phyread(uint16_t phydevaddr, uint16_t phyregaddr,
uint16_t *value);
static int lpc43_phywrite(uint16_t phydevaddr, uint16_t phyregaddr,
uint16_t value);
#ifdef CONFIG_ETH0_PHY_DM9161
static inline int lpc43_dm9161(struct lpc43_ethmac_s *priv);
#endif
static int lpc43_phyinit(struct lpc43_ethmac_s *priv);
/* MAC/DMA Initialization */
#ifdef CONFIG_LPC43_MII
static inline void lpc43_selectmii(void);
#endif
#ifdef CONFIG_LPC43_RMII
static inline void lpc43_selectrmii(void);
#endif
static inline void lpc43_ethgpioconfig(struct lpc43_ethmac_s *priv);
static void lpc43_ethreset(struct lpc43_ethmac_s *priv);
static int lpc43_macconfig(struct lpc43_ethmac_s *priv);
static void lpc43_macaddress(struct lpc43_ethmac_s *priv);
#ifdef CONFIG_NET_ICMPv6
static void lpc43_ipv6multicast(struct lpc43_ethmac_s *priv);
#endif
static int lpc43_macenable(struct lpc43_ethmac_s *priv);
static int lpc43_ethconfig(struct lpc43_ethmac_s *priv);
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: lpc43_getreg
*
* Description:
* This function may to used to intercept an monitor all register accesses.
* Clearly this is nothing you would want to do unless you are debugging
* this driver.
*
* Input Parameters:
* addr - The register address to read
*
* Returned Value:
* The value read from the register
*
****************************************************************************/
#ifdef CONFIG_LPC43_ETHMAC_REGDEBUG
static uint32_t lpc43_getreg(uint32_t addr)
{
static uint32_t prevaddr = 0;
static uint32_t preval = 0;
static uint32_t count = 0;
/* Read the value from the register */
uint32_t val = getreg32(addr);
/* Is this the same value that we read from the same register last time?
* Are we polling the register? If so, suppress some of the output.
*/
if (addr == prevaddr && val == preval)
{
if (count == 0xffffffff || ++count > 3)
{
if (count == 4)
{
ninfo("...\n");
}
return val;
}
}
/* No this is a new address or value */
else
{
/* Did we print "..." for the previous value? */
if (count > 3)
{
/* Yes.. then show how many times the value repeated */
ninfo("[repeats %d more times]\n", count - 3);
}
/* Save the new address, value, and count */
prevaddr = addr;
preval = val;
count = 1;
}
/* Show the register value read */
ninfo("%08x->%08x\n", addr, val);
return val;
}
#endif
/****************************************************************************
* Name: lpc43_putreg
*
* Description:
* This function may to used to intercept an monitor all register accesses.
* Clearly this is nothing you would want to do unless you are debugging
* this driver.
*
* Input Parameters:
* val - The value to write to the register
* addr - The register address to read
*
* Returned Value:
* None
*
****************************************************************************/
#ifdef CONFIG_LPC43_ETHMAC_REGDEBUG
static void lpc43_putreg(uint32_t val, uint32_t addr)
{
/* Show the register value being written */
ninfo("%08x<-%08x\n", addr, val);
/* Write the value */
putreg32(val, addr);
}
#endif
/****************************************************************************
* Name: lpc43_checksetup
*
* Description:
* Show the state of critical configuration registers.
*
* Input Parameters:
* None
*
* Returned Value:
* None
*
****************************************************************************/
#ifdef CONFIG_LPC43_ETHMAC_REGDEBUG
static void lpc43_checksetup(void)
{
}
#endif
/****************************************************************************
* Function: lpc43_initbuffer
*
* Description:
* Initialize the free buffer list.
*
* Input Parameters:
* priv - Reference to the driver state structure
*
* Returned Value:
* None
*
* Assumptions:
* Called during early driver initialization before Ethernet interrupts
* are enabled.
*
****************************************************************************/
static void lpc43_initbuffer(struct lpc43_ethmac_s *priv)
{
uint8_t *buffer;
int i;
/* Initialize the head of the free buffer list */
sq_init(&priv->freeb);
/* Add all of the pre-allocated buffers to the free buffer list */
for (i = 0, buffer = priv->alloc;
i < LPC43_ETH_NFREEBUFFERS;
i++, buffer += CONFIG_LPC43_ETH_BUFSIZE)
{
sq_addlast((sq_entry_t *)buffer, &priv->freeb);
}
}
/****************************************************************************
* Function: lpc43_allocbuffer
*
* Description:
* Allocate one buffer from the free buffer list.
*
* Input Parameters:
* priv - Reference to the driver state structure
*
* Returned Value:
* Pointer to the allocated buffer on success; NULL on failure
*
* Assumptions:
* May or may not be called from an interrupt handler. In either case,
* global interrupts are disabled, either explicitly or indirectly through
* interrupt handling logic.
*
****************************************************************************/
static inline uint8_t *lpc43_allocbuffer(struct lpc43_ethmac_s *priv)
{
/* Allocate a buffer by returning the head of the free buffer list */
return (uint8_t *)sq_remfirst(&priv->freeb);
}
/****************************************************************************
* Function: lpc43_freebuffer
*
* Description:
* Return a buffer to the free buffer list.
*
* Input Parameters:
* priv - Reference to the driver state structure
* buffer - A pointer to the buffer to be freed
*
* Returned Value:
* None
*
* Assumptions:
* May or may not be called from an interrupt handler. In either case,
* global interrupts are disabled, either explicitly or indirectly through
* interrupt handling logic.
*
****************************************************************************/
static inline void lpc43_freebuffer(struct lpc43_ethmac_s *priv,
uint8_t *buffer)
{
/* Free the buffer by adding it to the end of the free buffer list */
sq_addlast((sq_entry_t *)buffer, &priv->freeb);
}
/****************************************************************************
* Function: lpc43_isfreebuffer
*
* Description:
* Return TRUE if the free buffer list is not empty.
*
* Input Parameters:
* priv - Reference to the driver state structure
*
* Returned Value:
* True if there are one or more buffers in the free buffer list;
* false if the free buffer list is empty
*
* Assumptions:
* None.
*
****************************************************************************/
static inline bool lpc43_isfreebuffer(struct lpc43_ethmac_s *priv)
{
/* Return TRUE if the free buffer list is not empty */
return !sq_empty(&priv->freeb);
}
/****************************************************************************
* Function: lpc43_transmit
*
* Description:
* Start hardware transmission. Called either from the txdone interrupt
* handling or from watchdog based polling.
*
* Input Parameters:
* priv - Reference to the driver state structure
*
* Returned Value:
* OK on success; a negated errno on failure
*
* Assumptions:
* May or may not be called from an interrupt handler. In either case,
* global interrupts are disabled, either explicitly or indirectly through
* interrupt handling logic.
*
****************************************************************************/
static int lpc43_transmit(struct lpc43_ethmac_s *priv)
{
struct eth_txdesc_s *txdesc;
struct eth_txdesc_s *txfirst;
/* The internal (optimal) network buffer size may be configured to be
* larger than the Ethernet buffer size.
*/
#if OPTIMAL_ETH_BUFSIZE > CONFIG_LPC43_ETH_BUFSIZE
uint8_t *buffer;
int bufcount;
int lastsize;
int i;
#endif
/* Verify that the hardware is ready to send another packet. If we get
* here, then we are committed to sending a packet; Higher level logic
* must have assured that there is no transmission in progress.
*/
txdesc = priv->txhead;
txfirst = txdesc;
ninfo("d_len: %d d_buf: %p txhead: %p tdes0: %08" PRIx32 "\n",
priv->dev.d_len, priv->dev.d_buf, txdesc, txdesc->tdes0);
DEBUGASSERT(txdesc && (txdesc->tdes0 & ETH_TDES0_OWN) == 0);
/* Is the size to be sent greater than the size of the Ethernet buffer? */
DEBUGASSERT(priv->dev.d_len > 0 && priv->dev.d_buf != NULL);
#if OPTIMAL_ETH_BUFSIZE > CONFIG_LPC43_ETH_BUFSIZE
if (priv->dev.d_len > CONFIG_LPC43_ETH_BUFSIZE)
{
/* Yes... how many buffers will be need to send the packet? */
bufcount = (priv->dev.d_len + (CONFIG_LPC43_ETH_BUFSIZE - 1)) /
CONFIG_LPC43_ETH_BUFSIZE;
lastsize = priv->dev.d_len - (bufcount - 1) * CONFIG_LPC43_ETH_BUFSIZE;
ninfo("bufcount: %d lastsize: %d\n", bufcount, lastsize);
/* Set the first segment bit in the first TX descriptor */
txdesc->tdes0 |= ETH_TDES0_FS;
/* Set up all but the last TX descriptor */
buffer = priv->dev.d_buf;
for (i = 0; i < bufcount; i++)
{
/* This could be a normal event but the design does not handle it */
DEBUGASSERT((txdesc->tdes0 & ETH_TDES0_OWN) == 0);
/* Set the Buffer1 address pointer */
txdesc->tdes2 = (uint32_t)buffer;
/* Set the buffer size in all TX descriptors */
if (i == (bufcount - 1))
{
/* This is the last segment. Set the last segment bit in the
* last TX descriptor and ask for an interrupt when this
* segment transfer completes.
*/
txdesc->tdes0 |= (ETH_TDES0_LS | ETH_TDES0_IC);
/* This segment is, most likely, of fractional buffersize */
txdesc->tdes1 = lastsize;
buffer += lastsize;
}
else
{
/* This is not the last segment. We don't want an interrupt
* when this segment transfer completes.
*/
txdesc->tdes0 &= ~ETH_TDES0_IC;
/* The size of the transfer is the whole buffer */
txdesc->tdes1 = CONFIG_LPC43_ETH_BUFSIZE;
buffer += CONFIG_LPC43_ETH_BUFSIZE;
}
/* Give the descriptor to DMA */
txdesc->tdes0 |= ETH_TDES0_OWN;
txdesc = (struct eth_txdesc_s *)txdesc->tdes3;
}
}
else
#endif
{
/* The single descriptor is both the first and last segment. And we do
* want an interrupt when the transfer completes.
*/
txdesc->tdes0 |= (ETH_TDES0_FS | ETH_TDES0_LS | ETH_TDES0_IC);
/* Set frame size */
DEBUGASSERT(priv->dev.d_len <= CONFIG_NET_ETH_PKTSIZE);
txdesc->tdes1 = priv->dev.d_len;
/* Set the Buffer1 address pointer */
txdesc->tdes2 = (uint32_t)priv->dev.d_buf;
/* Set OWN bit of the TX descriptor tdes0. This gives the buffer to
* Ethernet DMA
*/
txdesc->tdes0 |= ETH_TDES0_OWN;
/* Point to the next available TX descriptor */
txdesc = (struct eth_txdesc_s *)txdesc->tdes3;
}
/* Remember where we left off in the TX descriptor chain */
priv->txhead = txdesc;
/* Detach the buffer from priv->dev structure. That buffer is now
* "in-flight".
*/
priv->dev.d_buf = NULL;
priv->dev.d_len = 0;
/* If there is no other TX buffer, in flight, then remember the location
* of the TX descriptor. This is the location to check for TX done events.
*/
if (!priv->txtail)
{
DEBUGASSERT(priv->inflight == 0);
priv->txtail = txfirst;
}
/* Increment the number of TX transfer in-flight */
priv->inflight++;
ninfo("txhead: %p txtail: %p inflight: %d\n",
priv->txhead, priv->txtail, priv->inflight);
/* If all TX descriptors are in-flight, then we have to disable receive
* interrupts too. This is because receive events can trigger more
* un-stoppable transmit events.
*/
if (priv->inflight >= CONFIG_LPC43_ETH_NTXDESC)
{
lpc43_disableint(priv, ETH_DMAINT_RI);
}
/* Check if the TX Buffer unavailable flag is set */
if ((lpc43_getreg(LPC43_ETH_DMASTAT) & ETH_DMAINT_TU) != 0)
{
/* Clear TX Buffer unavailable flag */
lpc43_putreg(ETH_DMAINT_TU, LPC43_ETH_DMASTAT);
/* Resume DMA transmission */
lpc43_putreg(0, LPC43_ETH_DMATXPD);
}
/* Enable TX interrupts */
lpc43_enableint(priv, ETH_DMAINT_TI);
/* Setup the TX timeout watchdog (perhaps restarting the timer) */
wd_start(&priv->txtimeout, LPC43_TXTIMEOUT,
lpc43_txtimeout_expiry, (wdparm_t)priv);
return OK;
}
/****************************************************************************
* Function: lpc43_txpoll
*
* Description:
* The transmitter is available, check if the network has any outgoing
* packets ready to send. This is a callback from devif_poll().
* devif_poll() may be called:
*
* 1. When the preceding TX packet send is complete,
* 2. When the preceding TX packet send timesout and the interface is reset
* 3. During normal TX polling
*
* Input Parameters:
* dev - Reference to the NuttX driver state structure
*
* Returned Value:
* OK on success; a negated errno on failure
*
* Assumptions:
* May or may not be called from an interrupt handler. In either case,
* global interrupts are disabled, either explicitly or indirectly through
* interrupt handling logic.
*
****************************************************************************/
static int lpc43_txpoll(struct net_driver_s *dev)
{
struct lpc43_ethmac_s *priv =
(struct lpc43_ethmac_s *)dev->d_private;
/* Send the packet */
lpc43_transmit(priv);
DEBUGASSERT(dev->d_len == 0 && dev->d_buf == NULL);
/* Check if the next TX descriptor is owned by the Ethernet DMA or
* CPU. We cannot perform the TX poll if we are unable to accept
* another packet for transmission.
*
* In a race condition, ETH_TDES0_OWN may be cleared BUT still
* not available because lpc43_freeframe() has not yet run. If
* lpc43_freeframe() has run, the buffer1 pointer (tdes2) will be
* nullified (and inflight should be < CONFIG_LPC43_ETH_NTXDESC).
*/
if ((priv->txhead->tdes0 & ETH_TDES0_OWN) != 0 ||
priv->txhead->tdes2 != 0)
{
/* We have to terminate the poll if we have no more descriptors
* available for another transfer.
*/
return -EBUSY;
}
/* We have the descriptor, we can continue the poll. Allocate a new
* buffer for the poll.
*/
dev->d_buf = lpc43_allocbuffer(priv);
/* We can't continue the poll if we have no buffers */
if (dev->d_buf == NULL)
{
/* Terminate the poll. */
return -ENOMEM;
}
return 0;
}
/****************************************************************************
* Function: lpc43_dopoll
*
* Description:
* The function is called in order to perform an out-of-sequence TX poll.
* This is done:
*
* 1. After completion of a transmission (lpc43_txdone),
* 2. When new TX data is available (lpc43_txavail_process), and
* 3. After a TX timeout to restart the sending process
* (lpc43_txtimeout_process).
*
* Input Parameters:
* priv - Reference to the driver state structure
*
* Returned Value:
* None
*
* Assumptions:
* Global interrupts are disabled by interrupt handling logic.
*
****************************************************************************/
static void lpc43_dopoll(struct lpc43_ethmac_s *priv)
{
struct net_driver_s *dev = &priv->dev;
/* Check if the next TX descriptor is owned by the Ethernet DMA or
* CPU. We cannot perform the TX poll if we are unable to accept
* another packet for transmission.
*
* In a race condition, ETH_TDES0_OWN may be cleared BUT still
* not available because lpc43_freeframe() has not yet run. If
* lpc43_freeframe() has run, the buffer1 pointer (tdes2) will be
* nullified (and inflight should be < CONFIG_LPC43_ETH_NTXDESC).
*/
if ((priv->txhead->tdes0 & ETH_TDES0_OWN) == 0 &&
priv->txhead->tdes2 == 0)
{
/* If we have the descriptor, then poll for new XMIT data.
* Allocate a buffer for the poll.
*/
DEBUGASSERT(dev->d_len == 0 && dev->d_buf == NULL);
dev->d_buf = lpc43_allocbuffer(priv);
/* We can't poll if we have no buffers */
if (dev->d_buf)
{
devif_poll(dev, lpc43_txpoll);
/* We will, most likely end up with a buffer to be freed. But it
* might not be the same one that we allocated above.
*/
if (dev->d_buf)
{
DEBUGASSERT(dev->d_len == 0);
lpc43_freebuffer(priv, dev->d_buf);
dev->d_buf = NULL;
}
}
}
}
/****************************************************************************
* Function: lpc43_enableint
*
* Description:
* Enable a "normal" interrupt
*
* Input Parameters:
* priv - Reference to the driver state structure
*
* Returned Value:
* None
*
* Assumptions:
* Global interrupts are disabled by interrupt handling logic.
*
****************************************************************************/
static void lpc43_enableint(struct lpc43_ethmac_s *priv,
uint32_t ierbit)
{
uint32_t regval;
/* Enable the specified "normal" interrupt */
regval = lpc43_getreg(LPC43_ETH_DMAINTEN);
regval |= (ETH_DMAINT_NIS | ierbit);
lpc43_putreg(regval, LPC43_ETH_DMAINTEN);
}
/****************************************************************************
* Function: lpc43_disableint
*
* Description:
* Disable a normal interrupt.
*
* Input Parameters:
* priv - Reference to the driver state structure
*
* Returned Value:
* None
*
* Assumptions:
* Global interrupts are disabled by interrupt handling logic.
*
****************************************************************************/
static void lpc43_disableint(struct lpc43_ethmac_s *priv,
uint32_t ierbit)
{
uint32_t regval;
/* Disable the "normal" interrupt */
regval = lpc43_getreg(LPC43_ETH_DMAINTEN);
regval &= ~ierbit;
/* Are all "normal" interrupts now disabled? */
if ((regval & ETH_DMAINT_NORMAL) == 0)
{
/* Yes.. disable normal interrupts */
regval &= ~ETH_DMAINT_NIS;
}
lpc43_putreg(regval, LPC43_ETH_DMAINTEN);
}
/****************************************************************************
* Function: lpc43_freesegment
*
* Description:
* The function is called when a frame is received using the DMA receive
* interrupt. It scans the RX descriptors to the received frame.
*
* Input Parameters:
* priv - Reference to the driver state structure
*
* Returned Value:
* None
*
* Assumptions:
* Global interrupts are disabled by interrupt handling logic.
*
****************************************************************************/
static void lpc43_freesegment(struct lpc43_ethmac_s *priv,
struct eth_rxdesc_s *rxfirst, int segments)
{
struct eth_rxdesc_s *rxdesc;
int i;
ninfo("rxfirst: %p segments: %d\n", rxfirst, segments);
/* Set OWN bit in RX descriptors. This gives the buffers back to DMA */
rxdesc = rxfirst;
for (i = 0; i < segments; i++)
{
rxdesc->rdes0 = ETH_RDES0_OWN;
rxdesc = (struct eth_rxdesc_s *)rxdesc->rdes3;
}
/* Reset the segment management logic */
priv->rxcurr = NULL;
priv->segments = 0;
/* Check if the RX Buffer unavailable flag is set */
if ((lpc43_getreg(LPC43_ETH_DMASTAT) & ETH_DMAINT_RU) != 0)
{
/* Clear RBUS Ethernet DMA flag */
lpc43_putreg(ETH_DMAINT_RU, LPC43_ETH_DMASTAT);
/* Resume DMA reception */
lpc43_putreg(0, LPC43_ETH_DMARXPD);
}
}
/****************************************************************************
* Function: lpc43_recvframe
*
* Description:
* The function is called when a frame is received using the DMA receive
* interrupt. It scans the RX descriptors of the received frame.
*
* NOTE: This function will silently discard any packets containing errors.
*
* Input Parameters:
* priv - Reference to the driver state structure
*
* Returned Value:
* OK if a packet was successfully returned; -EAGAIN if there are no
* further packets available
*
* Assumptions:
* Global interrupts are disabled by interrupt handling logic.
*
****************************************************************************/
static int lpc43_recvframe(struct lpc43_ethmac_s *priv)
{
struct eth_rxdesc_s *rxdesc;
struct eth_rxdesc_s *rxcurr;
uint8_t *buffer;
int i;
ninfo("rxhead: %p rxcurr: %p segments: %d\n",
priv->rxhead, priv->rxcurr, priv->segments);
/* Check if there are free buffers. We cannot receive new frames in this
* design unless there is at least one free buffer.
*/
if (!lpc43_isfreebuffer(priv))
{
nerr("ERROR: No free buffers\n");
return -ENOMEM;
}
/* Scan descriptors owned by the CPU. Scan until:
*
* 1) We find a descriptor still owned by the DMA,
* 2) We have examined all of the RX descriptors, or
* 3) All of the TX descriptors are in flight.
*
* This last case is obscure. It is due to that fact that each packet
* that we receive can generate an unstoppable transmission. So we have
* to stop receiving when we can not longer transmit. In this case, the
* transmit logic should also have disabled further RX interrupts.
*/
rxdesc = priv->rxhead;
for (i = 0;
(rxdesc->rdes0 & ETH_RDES0_OWN) == 0 &&
i < CONFIG_LPC43_ETH_NRXDESC &&
priv->inflight < CONFIG_LPC43_ETH_NTXDESC;
i++)
{
/* Check if this is the first segment in the frame */
if ((rxdesc->rdes0 & ETH_RDES0_FS) != 0 &&
(rxdesc->rdes0 & ETH_RDES0_LS) == 0)
{
priv->rxcurr = rxdesc;
priv->segments = 1;
}
/* Check if this is an intermediate segment in the frame */
else if (((rxdesc->rdes0 & ETH_RDES0_LS) == 0) &&
((rxdesc->rdes0 & ETH_RDES0_FS) == 0))
{
priv->segments++;
}
/* Otherwise, it is the last segment in the frame */
else
{
priv->segments++;
/* Check if there is only one segment in the frame */
if (priv->segments == 1)
{
rxcurr = rxdesc;
}
else
{
rxcurr = priv->rxcurr;
}
ninfo("rxhead: %p rxcurr: %p segments: %d\n",
priv->rxhead, priv->rxcurr, priv->segments);
/* Check if any errors are reported in the frame */
if ((rxdesc->rdes0 & ETH_RDES0_ES) == 0)
{
struct net_driver_s *dev = &priv->dev;
/* Get the Frame Length of the received packet: subtract 4
* bytes of the CRC
*/
dev->d_len = ((rxdesc->rdes0 & ETH_RDES0_FL_MASK) >>
ETH_RDES0_FL_SHIFT) - 4;
/* Get a buffer from the free list. We don't even check if
* this is successful because we already assure the free
* list is not empty above.
*/
buffer = lpc43_allocbuffer(priv);
/* Take the buffer from the RX descriptor of the first free
* segment, put it into the network device structure, then
* replace the buffer in the RX descriptor with the newly
* allocated buffer.
*/
DEBUGASSERT(dev->d_buf == NULL);
dev->d_buf = (uint8_t *)rxcurr->rdes2;
rxcurr->rdes2 = (uint32_t)buffer;
/* Return success, remembering where we should re-start
* scanning and resetting the segment scanning logic
*/
priv->rxhead = (struct eth_rxdesc_s *)rxdesc->rdes3;
lpc43_freesegment(priv, rxcurr, priv->segments);
ninfo("rxhead: %p d_buf: %p d_len: %d\n",
priv->rxhead, dev->d_buf, dev->d_len);
return OK;
}
else
{
/* Drop the frame that contains the errors, reset the segment
* scanning logic, and continue scanning with the next frame.
*/
nwarn("WARNING: Dropped, RX descriptor errors: %08" PRIx32
"\n",
rxdesc->rdes0);
lpc43_freesegment(priv, rxcurr, priv->segments);
}
}
/* Try the next descriptor */
rxdesc = (struct eth_rxdesc_s *)rxdesc->rdes3;
}
/* We get here after all of the descriptors have been scanned or when
* rxdesc points to the first descriptor owned by the DMA. Remember
* where we left off.
*/
priv->rxhead = rxdesc;
ninfo("rxhead: %p rxcurr: %p segments: %d\n",
priv->rxhead, priv->rxcurr, priv->segments);
return -EAGAIN;
}
/****************************************************************************
* Function: lpc43_receive
*
* Description:
* An interrupt was received indicating the availability of a new RX packet
*
* Input Parameters:
* priv - Reference to the driver state structure
*
* Returned Value:
* None
*
* Assumptions:
* Global interrupts are disabled by interrupt handling logic.
*
****************************************************************************/
static void lpc43_receive(struct lpc43_ethmac_s *priv)
{
struct net_driver_s *dev = &priv->dev;
/* Loop while while lpc43_recvframe() successfully retrieves valid
* Ethernet frames.
*/
while (lpc43_recvframe(priv) == OK)
{
#ifdef CONFIG_NET_PKT
/* When packet sockets are enabled, feed the frame into the tap */
pkt_input(&priv->dev);
#endif
/* Check if the packet is a valid size for the network buffer
* configuration (this should not happen)
*/
if (dev->d_len > CONFIG_NET_ETH_PKTSIZE)
{
nwarn("WARNING: Dropped, Too big: %d\n", dev->d_len);
/* Free dropped packet buffer */
if (dev->d_buf)
{
lpc43_freebuffer(priv, dev->d_buf);
dev->d_buf = NULL;
dev->d_len = 0;
}
continue;
}
#ifdef CONFIG_NET_PKT
/* When packet sockets are enabled, feed the frame into the tap */
pkt_input(&priv->dev);
#endif
/* We only accept IP packets of the configured type and ARP packets */
#ifdef CONFIG_NET_IPv4
if (BUF->type == HTONS(ETHTYPE_IP))
{
ninfo("IPv4 frame\n");
/* Receive an IPv4 packet from the network device */
ipv4_input(&priv->dev);
/* If the above function invocation resulted in data that should be
* sent out on the network, d_len field will set to a value > 0.
*/
if (priv->dev.d_len > 0)
{
/* And send the packet */
lpc43_transmit(priv);
}
}
else
#endif /* CONFIG_NET_IPv4 */
#ifdef CONFIG_NET_IPv6
if (BUF->type == HTONS(ETHTYPE_IP6))
{
ninfo("IPv6 frame\n");
/* Give the IPv6 packet to the network layer */
ipv6_input(&priv->dev);
/* If the above function invocation resulted in data that should be
* sent out on the network, d_len field will set to a value > 0.
*/
if (priv->dev.d_len > 0)
{
/* And send the packet */
lpc43_transmit(priv);
}
}
else
#endif /* CONFIG_NET_IPv6 */
#ifdef CONFIG_NET_ARP
if (BUF->type == HTONS(ETHTYPE_ARP))
{
ninfo("ARP frame\n");
/* Handle ARP packet */
arp_input(&priv->dev);
/* If the above function invocation resulted in data that should be
* sent out on the network, d_len field will set to a value > 0.
*/
if (priv->dev.d_len > 0)
{
lpc43_transmit(priv);
}
}
else
#endif
{
nwarn("WARNING: Dropped, Unknown type: %04x\n", BUF->type);
}
/* We are finished with the RX buffer. NOTE: If the buffer is
* re-used for transmission, the dev->d_buf field will have been
* nullified.
*/
if (dev->d_buf)
{
/* Free the receive packet buffer */
lpc43_freebuffer(priv, dev->d_buf);
dev->d_buf = NULL;
dev->d_len = 0;
}
}
}
/****************************************************************************
* Function: lpc43_freeframe
*
* Description:
* Scans the TX descriptors and frees the buffers of completed transfers.
*
* Input Parameters:
* priv - Reference to the driver state structure
*
* Returned Value:
* None.
*
* Assumptions:
* Global interrupts are disabled by interrupt handling logic.
*
****************************************************************************/
static void lpc43_freeframe(struct lpc43_ethmac_s *priv)
{
struct eth_txdesc_s *txdesc;
int i;
ninfo("txhead: %p txtail: %p inflight: %d\n",
priv->txhead, priv->txtail, priv->inflight);
/* Scan for "in-flight" descriptors owned by the CPU */
txdesc = priv->txtail;
if (txdesc)
{
DEBUGASSERT(priv->inflight > 0);
for (i = 0; (txdesc->tdes0 & ETH_TDES0_OWN) == 0; i++)
{
/* There should be a buffer assigned to all in-flight
* TX descriptors.
*/
ninfo("txtail: %p tdes0: %08" PRIx32
" tdes2: %08" PRIx32 " tdes3: %08" PRIx32 "\n",
txdesc, txdesc->tdes0, txdesc->tdes2, txdesc->tdes3);
DEBUGASSERT(txdesc->tdes2 != 0);
/* Check if this is the first segment of a TX frame. */
if ((txdesc->tdes0 & ETH_TDES0_FS) != 0)
{
/* Yes.. Free the buffer */
lpc43_freebuffer(priv, (uint8_t *)txdesc->tdes2);
}
/* In any event, make sure that TDES2 is nullified. */
txdesc->tdes2 = 0;
/* Check if this is the last segment of a TX frame */
if ((txdesc->tdes0 & ETH_TDES0_LS) != 0)
{
/* Yes.. Decrement the number of frames "in-flight". */
priv->inflight--;
/* If all of the TX descriptors were in-flight,
* then RX interrupts may have been disabled...
* we can re-enable them now.
*/
lpc43_enableint(priv, ETH_DMAINT_RI);
/* If there are no more frames in-flight, then bail. */
if (priv->inflight <= 0)
{
priv->txtail = NULL;
priv->inflight = 0;
return;
}
}
/* Try the next descriptor in the TX chain */
txdesc = (struct eth_txdesc_s *)txdesc->tdes3;
}
/* We get here if (1) there are still frames "in-flight". Remember
* where we left off.
*/
priv->txtail = txdesc;
ninfo("txhead: %p txtail: %p inflight: %d\n",
priv->txhead, priv->txtail, priv->inflight);
}
}
/****************************************************************************
* Function: lpc43_txdone
*
* Description:
* An interrupt was received indicating that the last TX packet(s) is done
*
* Input Parameters:
* priv - Reference to the driver state structure
*
* Returned Value:
* None
*
* Assumptions:
* Global interrupts are disabled by the watchdog logic.
*
****************************************************************************/
static void lpc43_txdone(struct lpc43_ethmac_s *priv)
{
DEBUGASSERT(priv->txtail != NULL);
/* Scan the TX descriptor change, returning buffers to free list */
lpc43_freeframe(priv);
/* If no further xmits are pending, then cancel the TX timeout */
if (priv->inflight <= 0)
{
/* Cancel the TX timeout */
wd_cancel(&priv->txtimeout);
/* And disable further TX interrupts. */
lpc43_disableint(priv, ETH_DMAINT_TI);
}
/* Then poll the network for new XMIT data */
lpc43_dopoll(priv);
}
/****************************************************************************
* Function: lpc43_interrupt_work
*
* Description:
* Perform interrupt related work from the worker thread
*
* Input Parameters:
* arg - The argument passed when work_queue() was called.
*
* Returned Value:
* OK on success
*
* Assumptions:
* Ethernet interrupts are disabled
*
****************************************************************************/
static void lpc43_interrupt_work(void *arg)
{
struct lpc43_ethmac_s *priv = (struct lpc43_ethmac_s *)arg;
uint32_t dmasr;
DEBUGASSERT(priv);
/* Get the DMA interrupt status bits (no MAC interrupts are expected) */
net_lock();
dmasr = lpc43_getreg(LPC43_ETH_DMASTAT);
/* Mask only enabled interrupts. This depends on the fact that the
* interrupt related bits (0-16) correspond in these two registers.
*/
dmasr &= lpc43_getreg(LPC43_ETH_DMAINTEN);
/* Check if there are pending "normal" interrupts */
if ((dmasr & ETH_DMAINT_NIS) != 0)
{
/* Yes.. Check if we received an incoming packet, if so, call
* lpc43_receive()
*/
if ((dmasr & ETH_DMAINT_RI) != 0)
{
/* Clear the pending receive interrupt */
lpc43_putreg(ETH_DMAINT_RI, LPC43_ETH_DMASTAT);
/* Handle the received package */
lpc43_receive(priv);
}
/* Check if a packet transmission just completed. If so, call
* lpc43_txdone(). This may disable further TX interrupts if there
* are no pending tansmissions.
*/
if ((dmasr & ETH_DMAINT_TI) != 0)
{
/* Clear the pending receive interrupt */
lpc43_putreg(ETH_DMAINT_TI, LPC43_ETH_DMASTAT);
/* Check if there are pending transmissions */
lpc43_txdone(priv);
}
/* Clear the pending normal summary interrupt */
lpc43_putreg(ETH_DMAINT_NIS, LPC43_ETH_DMASTAT);
}
/* Handle error interrupt only if CONFIG_DEBUG_NET is eanbled */
#ifdef CONFIG_DEBUG_NET
/* Check if there are pending "abnormal" interrupts */
if ((dmasr & ETH_DMAINT_AIS) != 0)
{
/* Just let the user know what happened */
nerr("ERROR: Abnormal event(s): %08x\n", dmasr);
/* Clear all pending abnormal events */
lpc43_putreg(ETH_DMAINT_ABNORMAL, LPC43_ETH_DMASTAT);
/* Clear the pending abnormal summary interrupt */
lpc43_putreg(ETH_DMAINT_AIS, LPC43_ETH_DMASTAT);
}
#endif /* CONFIG_DEBUG_NET */
net_unlock();
/* Re-enable Ethernet interrupts at the NVIC */
up_enable_irq(LPC43M4_IRQ_ETHERNET);
}
/****************************************************************************
* Function: lpc43_interrupt
*
* Description:
* Hardware interrupt handler
*
* Input Parameters:
* irq - Number of the IRQ that generated the interrupt
* context - Interrupt register state save info (architecture-specific)
*
* Returned Value:
* OK on success
*
* Assumptions:
*
****************************************************************************/
static int lpc43_interrupt(int irq, void *context, void *arg)
{
struct lpc43_ethmac_s *priv = &g_lpc43ethmac;
uint32_t dmasr;
/* Get the DMA interrupt status bits (no MAC interrupts are expected) */
dmasr = lpc43_getreg(LPC43_ETH_DMASTAT);
if (dmasr != 0)
{
/* Disable further Ethernet interrupts. Because Ethernet interrupts
* are also disabled if the TX timeout event occurs, there can be no
* race condition here.
*/
up_disable_irq(LPC43M4_IRQ_ETHERNET);
/* Check if a packet transmission just completed. */
if ((dmasr & ETH_DMAINT_TI) != 0)
{
/* If a TX transfer just completed, then cancel the TX timeout so
* there will be no race condition between any subsequent timeout
* expiration and the deferred interrupt processing.
*/
wd_cancel(&priv->txtimeout);
}
/* Schedule to perform the interrupt processing on the worker thread. */
work_queue(ETHWORK, &priv->irqwork, lpc43_interrupt_work, priv, 0);
}
return OK;
}
/****************************************************************************
* Function: lpc43_txtimeout_work
*
* Description:
* Perform TX timeout related work from the worker thread
*
* Input Parameters:
* arg - The argument passed when work_queue() as called.
*
* Returned Value:
* OK on success
*
* Assumptions:
* Ethernet interrupts are disabled
*
****************************************************************************/
static void lpc43_txtimeout_work(void *arg)
{
struct lpc43_ethmac_s *priv = (struct lpc43_ethmac_s *)arg;
/* Then reset the hardware. Just take the interface down, then back
* up again.
*/
net_lock();
lpc43_ifdown(&priv->dev);
lpc43_ifup(&priv->dev);
/* Then poll the network for new XMIT data */
lpc43_dopoll(priv);
net_unlock();
}
/****************************************************************************
* Function: lpc43_txtimeout_expiry
*
* Description:
* Our TX watchdog timed out. Called from the timer interrupt handler.
* The last TX never completed. Reset the hardware and start again.
*
* Input Parameters:
* arg - The argument
*
* Returned Value:
* None
*
* Assumptions:
* Global interrupts are disabled by the watchdog logic.
*
****************************************************************************/
static void lpc43_txtimeout_expiry(wdparm_t arg)
{
struct lpc43_ethmac_s *priv = (struct lpc43_ethmac_s *)arg;
ninfo("Timeout!\n");
/* Disable further Ethernet interrupts. This will prevent some race
* conditions with interrupt work. There is still a potential race
* condition with interrupt work that is already queued and in progress.
*
* Interrupts will be re-enabled when lpc43_ifup() is called.
*/
up_disable_irq(LPC43M4_IRQ_ETHERNET);
/* Schedule to perform the TX timeout processing on the worker thread,
* perhaps cancelling any pending IRQ processing.
*/
work_queue(ETHWORK, &priv->irqwork, lpc43_txtimeout_work, priv, 0);
}
/****************************************************************************
* Function: lpc43_ifup
*
* Description:
* NuttX Callback: Bring up the Ethernet interface when an IP address is
* provided
*
* Input Parameters:
* dev - Reference to the NuttX driver state structure
*
* Returned Value:
* None
*
* Assumptions:
*
****************************************************************************/
static int lpc43_ifup(struct net_driver_s *dev)
{
struct lpc43_ethmac_s *priv =
(struct lpc43_ethmac_s *)dev->d_private;
int ret;
#ifdef CONFIG_NET_IPv4
ninfo("Bringing up: %u.%u.%u.%u\n",
ip4_addr1(dev->d_ipaddr), ip4_addr2(dev->d_ipaddr),
ip4_addr3(dev->d_ipaddr), ip4_addr4(dev->d_ipaddr));
#endif
#ifdef CONFIG_NET_IPv6
ninfo("Bringing up: %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n",
dev->d_ipv6addr[0], dev->d_ipv6addr[1], dev->d_ipv6addr[2],
dev->d_ipv6addr[3], dev->d_ipv6addr[4], dev->d_ipv6addr[5],
dev->d_ipv6addr[6], dev->d_ipv6addr[7]);
#endif
/* Configure the Ethernet interface for DMA operation. */
ret = lpc43_ethconfig(priv);
if (ret < 0)
{
return ret;
}
/* Enable the Ethernet interrupt */
priv->ifup = true;
up_enable_irq(LPC43M4_IRQ_ETHERNET);
lpc43_checksetup();
return OK;
}
/****************************************************************************
* Function: lpc43_ifdown
*
* Description:
* NuttX Callback: Stop the interface.
*
* Input Parameters:
* dev - Reference to the NuttX driver state structure
*
* Returned Value:
* None
*
* Assumptions:
*
****************************************************************************/
static int lpc43_ifdown(struct net_driver_s *dev)
{
struct lpc43_ethmac_s *priv =
(struct lpc43_ethmac_s *)dev->d_private;
irqstate_t flags;
ninfo("Taking the network down\n");
/* Disable the Ethernet interrupt */
flags = enter_critical_section();
up_disable_irq(LPC43M4_IRQ_ETHERNET);
/* Cancel the TX timeout timers */
wd_cancel(&priv->txtimeout);
/* Put the EMAC in its reset, non-operational state. This should be
* a known configuration that will guarantee the lpc43_ifup() always
* successfully brings the interface back up.
*/
lpc43_ethreset(priv);
/* Mark the device "down" */
priv->ifup = false;
leave_critical_section(flags);
return OK;
}
/****************************************************************************
* Function: lpc43_txavail_work
*
* Description:
* Perform an out-of-cycle poll on the worker thread.
*
* Input Parameters:
* arg - Reference to the NuttX driver state structure (cast to void*)
*
* Returned Value:
* None
*
* Assumptions:
* Called on the higher priority worker thread.
*
****************************************************************************/
static void lpc43_txavail_work(void *arg)
{
struct lpc43_ethmac_s *priv = (struct lpc43_ethmac_s *)arg;
/* Ignore the notification if the interface is not yet up */
net_lock();
ninfo("ifup: %d\n", priv->ifup);
if (priv->ifup)
{
/* Poll for new XMIT data */
lpc43_dopoll(priv);
}
net_unlock();
}
/****************************************************************************
* Function: lpc43_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.
*
* Input Parameters:
* dev - Reference to the NuttX driver state structure
*
* Returned Value:
* None
*
* Assumptions:
* Called in normal user mode
*
****************************************************************************/
static int lpc43_txavail(struct net_driver_s *dev)
{
struct lpc43_ethmac_s *priv =
(struct lpc43_ethmac_s *)dev->d_private;
/* Is our single work structure available? It may not be if there are
* pending interrupt actions and we will have to ignore the Tx
* availability action.
*/
if (work_available(&priv->pollwork))
{
/* Schedule to serialize the poll on the worker thread. */
work_queue(ETHWORK, &priv->pollwork, lpc43_txavail_work, priv, 0);
}
return OK;
}
/****************************************************************************
* Function: lpc43_calcethcrc
*
* Description:
* Function to calculate the CRC used by LPC43 to check an Ethernet frame
*
* Input Parameters:
* data - the data to be checked
* length - length of the data
*
* Returned Value:
* None
*
* Assumptions:
*
****************************************************************************/
#if defined(CONFIG_NET_MCASTGROUP) || defined(CONFIG_NET_ICMPv6)
static uint32_t lpc43_calcethcrc(const uint8_t *data, size_t length)
{
uint32_t crc = 0xffffffff;
size_t i;
int j;
for (i = 0; i < length; i++)
{
for (j = 0; j < 8; j++)
{
if (((crc >> 31) ^ (data[i] >> j)) & 0x01)
{
/* Return success, remembering where we should re-start
* scanning and resetting the segment scanning logic
*/
crc = (crc << 1) ^ 0x04c11db7;
}
else
{
crc = crc << 1;
}
}
}
return ~crc;
}
#endif
/****************************************************************************
* Function: lpc43_addmac
*
* Description:
* NuttX Callback: Add the specified MAC address to the hardware multicast
* address filtering
*
* Input Parameters:
* dev - Reference to the NuttX driver state structure
* mac - The MAC address to be added
*
* Returned Value:
* None
*
* Assumptions:
*
****************************************************************************/
#if defined(CONFIG_NET_MCASTGROUP) || defined(CONFIG_NET_ICMPv6)
static int lpc43_addmac(struct net_driver_s *dev, const uint8_t *mac)
{
uint32_t crc;
uint32_t hashindex;
uint32_t temp;
uint32_t registeraddress;
ninfo("MAC: %02x:%02x:%02x:%02x:%02x:%02x\n",
mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
/* Add the MAC address to the hardware multicast hash table */
crc = lpc43_calcethcrc(mac, 6);
hashindex = (crc >> 26) & 0x3f;
if (hashindex > 31)
{
registeraddress = LPC43_ETH_MACHTHI;
hashindex -= 32;
}
else
{
registeraddress = LPC43_ETH_MACHTLO;
}
temp = lpc43_getreg(registeraddress);
temp |= 1 << hashindex;
lpc43_putreg(temp, registeraddress);
temp = lpc43_getreg(LPC43_ETH_MACFFLT);
temp |= (ETH_MACFFLT_HM | ETH_MACFFLT_HPF);
lpc43_putreg(temp, LPC43_ETH_MACFFLT);
return OK;
}
#endif
/****************************************************************************
* Function: lpc43_rmmac
*
* Description:
* NuttX Callback: Remove the specified MAC address from the hardware
* multicast address filtering
*
* Input Parameters:
* dev - Reference to the NuttX driver state structure
* mac - The MAC address to be removed
*
* Returned Value:
* None
*
* Assumptions:
*
****************************************************************************/
#ifdef CONFIG_NET_MCASTGROUP
static int lpc43_rmmac(struct net_driver_s *dev, const uint8_t *mac)
{
uint32_t crc;
uint32_t hashindex;
uint32_t temp;
uint32_t registeraddress;
ninfo("MAC: %02x:%02x:%02x:%02x:%02x:%02x\n",
mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
/* Remove the MAC address to the hardware multicast hash table */
crc = lpc43_calcethcrc(mac, 6);
hashindex = (crc >> 26) & 0x3f;
if (hashindex > 31)
{
registeraddress = LPC43_ETH_MACHTHI;
hashindex -= 32;
}
else
{
registeraddress = LPC43_ETH_MACHTLO;
}
temp = lpc43_getreg(registeraddress);
temp &= ~(1 << hashindex);
lpc43_putreg(temp, registeraddress);
/* If there is no address registered any more, delete multicast filtering */
if (lpc43_getreg(LPC43_ETH_MACHTHI) == 0 &&
lpc43_getreg(LPC43_ETH_MACHTLO) == 0)
{
temp = lpc43_getreg(LPC43_ETH_MACFFLT);
temp &= ~(ETH_MACFFLT_HM | ETH_MACFFLT_HPF);
lpc43_putreg(temp, LPC43_ETH_MACFFLT);
}
return OK;
}
#endif
/****************************************************************************
* Function: lpc43_txdescinit
*
* Description:
* Initializes the DMA TX descriptors in chain mode.
*
* Input Parameters:
* priv - Reference to the driver state structure
*
* Returned Value:
* None
*
* Assumptions:
*
****************************************************************************/
static void lpc43_txdescinit(struct lpc43_ethmac_s *priv)
{
struct eth_txdesc_s *txdesc;
int i;
/* priv->txhead point to the first, available TX descriptor in the chain.
* Set the priv->txhead pointer to the first descriptor in the table.
*/
priv->txhead = priv->txtable;
/* priv->txtail will point to the first segment of the oldest pending
* "in-flight" TX transfer. NULL means that there are no active TX
* transfers.
*/
priv->txtail = NULL;
priv->inflight = 0;
/* Initialize each TX descriptor */
for (i = 0; i < CONFIG_LPC43_ETH_NTXDESC; i++)
{
txdesc = &priv->txtable[i];
/* Set Second Address Chained bit */
txdesc->tdes0 = ETH_TDES0_TCH;
#ifdef CHECKSUM_BY_HARDWARE
/* Enable the checksum insertion for the TX frames */
txdesc->tdes0 |= ETH_TDES0_CIC_ALL;
#endif
/* Clear Buffer1 address pointer (buffers will be assigned as they
* are used)
*/
txdesc->tdes2 = 0;
/* Initialize the next descriptor with
* the Next Descriptor Polling Enable
*/
if (i < (CONFIG_LPC43_ETH_NTXDESC - 1))
{
/* Set next descriptor address register with next descriptor base
* address
*/
txdesc->tdes3 = (uint32_t)&priv->txtable[i + 1];
}
else
{
/* For last descriptor, set next descriptor address register equal
* to the first descriptor base address
*/
txdesc->tdes3 = (uint32_t)priv->txtable;
}
}
/* Set Transmit Descriptor List Address Register */
lpc43_putreg((uint32_t)priv->txtable, LPC43_ETH_DMATXDLA);
}
/****************************************************************************
* Function: lpc43_rxdescinit
*
* Description:
* Initializes the DMA RX descriptors in chain mode.
*
* Input Parameters:
* priv - Reference to the driver state structure
*
* Returned Value:
* None
*
* Assumptions:
*
****************************************************************************/
static void lpc43_rxdescinit(struct lpc43_ethmac_s *priv)
{
struct eth_rxdesc_s *rxdesc;
int i;
/* priv->rxhead will point to the first, RX descriptor in the chain.
* This will be where we receive the first incomplete frame.
*/
priv->rxhead = priv->rxtable;
/* If we accumulate the frame in segments, priv->rxcurr points to the
* RX descriptor of the first segment in the current TX frame.
*/
priv->rxcurr = NULL;
priv->segments = 0;
/* Initialize each TX descriptor */
for (i = 0; i < CONFIG_LPC43_ETH_NRXDESC; i++)
{
rxdesc = &priv->rxtable[i];
/* Set Own bit of the RX descriptor rdes0 */
rxdesc->rdes0 = ETH_RDES0_OWN;
/* Set Buffer1 size and Second Address Chained bit and enabled DMA
* RX desc receive interrupt
*/
rxdesc->rdes1 = ETH_RDES1_RCH | (uint32_t)CONFIG_LPC43_ETH_BUFSIZE;
/* Set Buffer1 address pointer */
rxdesc->rdes2 = (uint32_t)&priv->rxbuffer[i*CONFIG_LPC43_ETH_BUFSIZE];
/* Initialize the next descriptor with
* the Next Descriptor Polling Enable
*/
if (i < (CONFIG_LPC43_ETH_NRXDESC - 1))
{
/* Set next descriptor address register with next descriptor base
* address
*/
rxdesc->rdes3 = (uint32_t)&priv->rxtable[i + 1];
}
else
{
/* For last descriptor, set next descriptor address register equal
* to the first descriptor base address
*/
rxdesc->rdes3 = (uint32_t)priv->rxtable;
}
}
/* Set Receive Descriptor List Address Register */
lpc43_putreg((uint32_t)priv->rxtable, LPC43_ETH_DMARXDLA);
}
/****************************************************************************
* Function: lpc43_ioctl
*
* Description:
* Executes the SIOCxMIIxxx command and responds using the request struct
* that must be provided as its 2nd parameter.
*
* When called with SIOCGMIIPHY it will get the PHY address for the device
* and write it to the req->phy_id field of the request struct.
*
* When called with SIOCGMIIREG it will read a register of the PHY that is
* specified using the req->reg_no struct field and then write its output
* to the req->val_out field.
*
* When called with SIOCSMIIREG it will write to a register of the PHY that
* is specified using the req->reg_no struct field and use req->val_in as
* its input.
*
* Input Parameters:
* dev - Ethernet device structure
* cmd - SIOCxMIIxxx command code
* arg - Request structure also used to return values
*
* Returned Value: Negated errno on failure.
*
* Assumptions:
*
****************************************************************************/
#ifdef CONFIG_NETDEV_IOCTL
static int lpc43_ioctl(struct net_driver_s *dev, int cmd, unsigned long arg)
{
#if defined(CONFIG_NETDEV_PHY_IOCTL) && defined(CONFIG_ARCH_PHY_INTERRUPT)
struct lpc43_ethmac_s *priv =
(struct lpc43_ethmac_s *)dev->d_private;
#endif
int ret;
switch (cmd)
{
#ifdef CONFIG_NETDEV_PHY_IOCTL
#ifdef CONFIG_ARCH_PHY_INTERRUPT
case SIOCMIINOTIFY: /* Set up for PHY event notifications */
{
struct mii_ioctl_notify_s *req =
(struct mii_ioctl_notify_s *)((uintptr_t)arg);
ret = phy_notify_subscribe(dev->d_ifname, req->pid, &req->event);
if (ret == OK)
{
/* Enable PHY link up/down interrupts */
ret = lpc43_phyintenable(priv);
}
}
break;
#endif
case SIOCGMIIPHY: /* Get MII PHY address */
{
struct mii_ioctl_data_s *req =
(struct mii_ioctl_data_s *)((uintptr_t)arg);
req->phy_id = CONFIG_LPC43_PHYADDR;
ret = OK;
}
break;
case SIOCGMIIREG: /* Get register from MII PHY */
{
struct mii_ioctl_data_s *req =
(struct mii_ioctl_data_s *)((uintptr_t)arg);
ret = lpc43_phyread(req->phy_id, req->reg_num, &req->val_out);
}
break;
case SIOCSMIIREG: /* Set register in MII PHY */
{
struct mii_ioctl_data_s *req =
(struct mii_ioctl_data_s *)((uintptr_t)arg);
ret = lpc43_phywrite(req->phy_id, req->reg_num, req->val_in);
}
break;
#endif /* ifdef CONFIG_NETDEV_PHY_IOCTL */
default:
ret = -ENOTTY;
break;
}
return ret;
}
#endif /* CONFIG_NETDEV_IOCTL */
/****************************************************************************
* Function: lpc43_phyintenable
*
* Description:
* Enable link up/down PHY interrupts. The interrupt protocol is like
* this:
*
* - Interrupt status is cleared when the interrupt is enabled.
* - Interrupt occurs. Interrupt is disabled (at the processor level) when
* is received.
* - Interrupt status is cleared when the interrupt is re-enabled.
*
* Input Parameters:
* priv - A reference to the private driver state structure
*
* Returned Value:
* OK on success; Negated errno (-ETIMEDOUT) on failure.
*
****************************************************************************/
#if defined(CONFIG_NETDEV_PHY_IOCTL) && defined(CONFIG_ARCH_PHY_INTERRUPT)
static int lpc43_phyintenable(struct lpc43_ethmac_s *priv)
{
#warning Missing logic
return -ENOSYS;
}
#endif
/****************************************************************************
* Function: lpc43_phyread
*
* Description:
* Read a PHY register.
*
* Input Parameters:
* phydevaddr - The PHY device address
* phyregaddr - The PHY register address
* value - The location to return the 16-bit PHY register value.
*
* Returned Value:
* OK on success; Negated errno on failure.
*
* Assumptions:
*
****************************************************************************/
static int lpc43_phyread(uint16_t phydevaddr,
uint16_t phyregaddr, uint16_t *value)
{
volatile uint32_t timeout;
uint32_t regval;
/* Configure the MACMIIAR register,
* preserving CSR Clock Range CR[2:0] bits
*/
regval = lpc43_getreg(LPC43_ETH_MACMIIA);
regval &= ETH_MACMIIA_CR_MASK;
/* Set the PHY device address, PHY register address, and set the buy bit.
* the ETH_MACMIIA_WR is clear, indicating a read operation.
*/
regval |= (phydevaddr << ETH_MACMIIA_PA_SHIFT) & ETH_MACMIIA_PA_MASK;
regval |= (phyregaddr << ETH_MACMIIA_MR_SHIFT) & ETH_MACMIIA_MR_MASK;
regval |= ETH_MACMIIA_GB;
lpc43_putreg(regval, LPC43_ETH_MACMIIA);
/* Wait for the transfer to complete */
for (timeout = 0; timeout < PHY_READ_TIMEOUT; timeout++)
{
if ((lpc43_getreg(LPC43_ETH_MACMIIA) & ETH_MACMIIA_GB) == 0)
{
*value = (uint16_t)lpc43_getreg(LPC43_ETH_MACMIID);
return OK;
}
}
nerr("ERROR: MII transfer timed out: phydevaddr: %04x phyregaddr: %04x\n",
phydevaddr, phyregaddr);
return -ETIMEDOUT;
}
/****************************************************************************
* Function: lpc43_phywrite
*
* Description:
* Write to a PHY register.
*
* Input Parameters:
* phydevaddr - The PHY device address
* phyregaddr - The PHY register address
* value - The 16-bit value to write to the PHY register value.
*
* Returned Value:
* OK on success; Negated errno on failure.
*
* Assumptions:
*
****************************************************************************/
static int lpc43_phywrite(uint16_t phydevaddr,
uint16_t phyregaddr, uint16_t value)
{
volatile uint32_t timeout;
uint32_t regval;
/* Configure the MACMIIAR register,
* preserving CSR Clock Range CR[2:0] bits
*/
regval = lpc43_getreg(LPC43_ETH_MACMIIA);
regval &= ETH_MACMIIA_CR_MASK;
/* Set the PHY device address, PHY register address, and set the busy bit.
* the ETH_MACMIIA_WR is set, indicating a write operation.
*/
regval |= (phydevaddr << ETH_MACMIIA_PA_SHIFT) & ETH_MACMIIA_PA_MASK;
regval |= (phyregaddr << ETH_MACMIIA_MR_SHIFT) & ETH_MACMIIA_MR_MASK;
regval |= (ETH_MACMIIA_GB | ETH_MACMIIA_WR);
/* Write the value into the MACIIDR register before setting the new
* MACMIIAR register value.
*/
lpc43_putreg(value, LPC43_ETH_MACMIID);
lpc43_putreg(regval, LPC43_ETH_MACMIIA);
/* Wait for the transfer to complete */
for (timeout = 0; timeout < PHY_WRITE_TIMEOUT; timeout++)
{
if ((lpc43_getreg(LPC43_ETH_MACMIIA) & ETH_MACMIIA_GB) == 0)
{
return OK;
}
}
nerr("ERROR: MII transfer timed out: "
"phydevaddr: %04x phyregaddr: %04x value: %04x\n",
phydevaddr, phyregaddr, value);
return -ETIMEDOUT;
}
/****************************************************************************
* Function: lpc43_dm9161
*
* Description:
* Special workaround for the Davicom DM9161 PHY is required. On power,
* up, the PHY is not usually configured correctly but will work after
* a powered-up reset. This is really a workaround for some more
* fundamental issue with the PHY clocking initialization, but the
* root cause has not been studied (nor will it be with this workaround).
*
* Input Parameters:
* priv - A reference to the private driver state structure
*
* Returned Value:
* None
*
****************************************************************************/
#ifdef CONFIG_ETH0_PHY_DM9161
static inline int lpc43_dm9161(struct lpc43_ethmac_s *priv)
{
uint16_t phyval;
int ret;
/* Read the PHYID1 register; A failure to read the PHY ID is one
* indication that check if the DM9161 PHY CHIP is not ready.
*/
ret = lpc43_phyread(CONFIG_LPC43_PHYADDR, MII_PHYID1, &phyval);
if (ret < 0)
{
nerr("ERROR: Failed to read the PHY ID1: %d\n", ret);
return ret;
}
/* If we failed to read the PHY ID1 register,
* then reset the MCU to recover
*/
else if (phyval == 0xffff)
{
up_systemreset();
}
ninfo("PHY ID1: 0x%04X\n", phyval);
/* Now check the "DAVICOM Specified Configuration Register (DSCR)"(16) */
ret = lpc43_phyread(CONFIG_LPC43_PHYADDR, 16, &phyval);
if (ret < 0)
{
nerr("ERROR: Failed to read the PHY Register 0x10: %d\n", ret);
return ret;
}
/* Bit 8 of the DSCR register is zero, then the DM9161 has not selected
* RMII. If RMII is not selected, then reset the MCU to recover.
*/
else if ((phyval & (1 << 8)) == 0)
{
up_systemreset();
}
return OK;
}
#endif
/****************************************************************************
* Function: lpc43_phyinit
*
* Description:
* Configure the PHY and determine the link speed/duplex.
*
* Input Parameters:
* priv - A reference to the private driver state structure
*
* Returned Value:
* OK on success; Negated errno on failure.
*
* Assumptions:
*
****************************************************************************/
static int lpc43_phyinit(struct lpc43_ethmac_s *priv)
{
volatile uint32_t timeout;
uint32_t regval;
uint16_t phyval;
int ret;
/* Assume 10MBps and half duplex */
priv->mbps100 = 0;
priv->fduplex = 0;
/* Setup up PHY clocking by setting the SR field in the MACMIIAR register */
regval = lpc43_getreg(LPC43_ETH_MACMIIA);
regval &= ~ETH_MACMIIA_CR_MASK;
regval |= ETH_MACMIIA_CR;
lpc43_putreg(regval, LPC43_ETH_MACMIIA);
/* Put the PHY in reset mode */
ret = lpc43_phywrite(CONFIG_LPC43_PHYADDR, MII_MCR, MII_MCR_RESET);
if (ret < 0)
{
nerr("ERROR: Failed to reset the PHY: %d\n", ret);
return ret;
}
up_mdelay(PHY_RESET_DELAY);
#ifdef CONFIG_LPC43_PHYINIT
/* Perform any necessary, board-specific PHY initialization */
ret = lpc43_phy_boardinitialize(0);
if (ret < 0)
{
nerr("ERROR: Failed to initialize the PHY: %d\n", ret);
return ret;
}
#endif
#ifdef CONFIG_ETH0_PHY_DM9161
/* Special workaround for the Davicom DM9161 PHY is required. */
ret = lpc43_dm9161(priv);
if (ret < 0)
{
return ret;
}
#endif
/* Perform auto-negotiation if so configured */
#ifdef CONFIG_LPC43_AUTONEG
/* Wait for link status */
for (timeout = 0; timeout < PHY_RETRY_TIMEOUT; timeout++)
{
ret = lpc43_phyread(CONFIG_LPC43_PHYADDR, MII_MSR, &phyval);
if (ret < 0)
{
nerr("ERROR: Failed to read the PHY MSR: %d\n", ret);
return ret;
}
else if ((phyval & MII_MSR_LINKSTATUS) != 0)
{
break;
}
}
if (timeout >= PHY_RETRY_TIMEOUT)
{
nerr("ERROR: Timed out waiting for link status: %04x\n", phyval);
return -ETIMEDOUT;
}
/* Enable auto-negotiation */
ret = lpc43_phywrite(CONFIG_LPC43_PHYADDR, MII_MCR, MII_MCR_ANENABLE);
if (ret < 0)
{
nerr("ERROR: Failed to enable auto-negotiation: %d\n", ret);
return ret;
}
/* Wait until auto-negotiation completes */
for (timeout = 0; timeout < PHY_RETRY_TIMEOUT; timeout++)
{
ret = lpc43_phyread(CONFIG_LPC43_PHYADDR, MII_MSR, &phyval);
if (ret < 0)
{
nerr("ERROR: Failed to read the PHY MSR: %d\n", ret);
return ret;
}
else if ((phyval & MII_MSR_ANEGCOMPLETE) != 0)
{
break;
}
}
if (timeout >= PHY_RETRY_TIMEOUT)
{
nerr("ERROR: Timed out waiting for auto-negotiation\n");
return -ETIMEDOUT;
}
/* Read the result of the auto-negotiation from the PHY-specific register */
ret = lpc43_phyread(CONFIG_LPC43_PHYADDR, CONFIG_LPC43_PHYSR, &phyval);
if (ret < 0)
{
nerr("ERROR: Failed to read PHY status register\n");
return ret;
}
/* Remember the selected speed and duplex modes */
ninfo("PHYSR[%d]: %04x\n", CONFIG_LPC43_PHYSR, phyval);
#ifdef CONFIG_ETH0_PHY_LAN8720
if ((phyval & (MII_MSR_100BASETXHALF | MII_MSR_100BASETXFULL)) != 0)
{
priv->mbps100 = 1;
}
if ((phyval & (MII_MSR_100BASETXFULL | MII_MSR_10BASETXFULL)) != 0)
{
priv->fduplex = 1;
}
#else
/* Different PHYs present speed and mode information in different ways.
* IF This CONFIG_LPC43_PHYSR_ALTCONFIG is selected, this indicates that
* the PHY represents speed and mode information are combined, for example,
* with separate bits for 10HD, 100HD, 10FD and 100FD.
*/
#ifdef CONFIG_LPC43_PHYSR_ALTCONFIG
switch (phyval & CONFIG_LPC43_PHYSR_ALTMODE)
{
case CONFIG_LPC43_PHYSR_100FD:
priv->fduplex = 1;
priv->mbps100 = 1;
break;
case CONFIG_LPC43_PHYSR_100HD:
priv->fduplex = 0;
priv->mbps100 = 1;
break;
case CONFIG_LPC43_PHYSR_10FD:
priv->fduplex = 1;
priv->mbps100 = 0;
break;
default:
case CONFIG_LPC43_PHYSR_10HD:
priv->fduplex = 0;
priv->mbps100 = 0;
break;
}
/* Different PHYs present speed and mode information in different ways.
* Some will present separate information for speed and mode (this is the
* default). Those PHYs, for example, may provide a 10/100 Mbps indication
* and a separate full/half duplex indication.
*/
#else
if ((phyval & CONFIG_LPC43_PHYSR_MODE) == CONFIG_LPC43_PHYSR_FULLDUPLEX)
{
priv->fduplex = 1;
}
if ((phyval & CONFIG_LPC43_PHYSR_SPEED) == CONFIG_LPC43_PHYSR_100MBPS)
{
priv->mbps100 = 1;
}
#endif
#endif
#else /* Auto-negotiation not selected */
#ifdef CONFIG_LPC43_ETHFD
priv->fduplex = 1;
#endif
#ifdef CONFIG_LPC43_ETH100MBPS
priv->mbps100 = 1;
#endif
phyval = 0;
if (priv->mbps100)
{
phyval |= MII_MCR_FULLDPLX;
}
if (priv->fduplex)
{
phyval |= MII_MCR_SPEED100;
}
ret = lpc43_phywrite(CONFIG_LPC43_PHYADDR, MII_MCR, phyval);
if (ret < 0)
{
nerr("ERROR: Failed to write the PHY MCR: %d\n", ret);
return ret;
}
up_mdelay(PHY_CONFIG_DELAY);
/* Remember the selected speed and duplex modes
* REVISIT: Isn't this redundant?
*/
#ifdef CONFIG_LPC43_ETHFD
priv->fduplex = 1;
#endif
#ifdef CONFIG_LPC43_ETH100MBPS
priv->mbps100 = 1;
#endif
#endif
ninfo("Duplex: %s Speed: %d MBps\n",
priv->fduplex ? "FULL" : "HALF",
priv->mbps100 ? 100 : 10);
return OK;
}
/****************************************************************************
* Name: lpc43_selectmii
*
* Description:
* Selects the MII interface.
*
* Input Parameters:
* None
*
* Returned Value:
* None
*
****************************************************************************/
#ifdef CONFIG_LPC43_MII
static inline void lpc43_selectmii(void)
{
uint32_t regval;
regval = getreg32(LPC43_CREG6);
regval &= ~SYSCFG_PMC_MII_RMII_SEL;
putreg32(regval, LPC43_CREG6);
}
#endif
/****************************************************************************
* Name: lpc43_selectrmii
*
* Description:
* Selects the RMII interface.
*
* Input Parameters:
* None
*
* Returned Value:
* None
*
****************************************************************************/
static inline void lpc43_selectrmii(void)
{
uint32_t regval;
regval = getreg32(LPC43_CREG6);
regval |= CREG6_ETHMODE_RMII;
putreg32(regval, LPC43_CREG6);
}
/****************************************************************************
* Function: lpc43_ethgpioconfig
*
* Description:
* Configure GPIOs for the Ethernet interface.
*
* Input Parameters:
* priv - A reference to the private driver state structure
*
* Returned Value:
* None.
*
* Assumptions:
*
****************************************************************************/
static inline void lpc43_ethgpioconfig(struct lpc43_ethmac_s *priv)
{
/* Configure GPIO pins to support Ethernet */
#if defined(CONFIG_LPC43_MII) || defined(CONFIG_LPC43_RMII)
/* MDC and MDIO are common to both modes */
lpc43_pin_config(PINCONF_ENET_MDC);
lpc43_pin_config(PINCONF_ENET_MDIO);
/* Set up the MII interface */
#if defined(CONFIG_LPC43_MII)
/* Select the MII interface */
lpc43_selectmii();
/* MII interface pins (17):
*
* MII_TX_CLK, MII_TXD[3:0], MII_TX_EN, MII_RX_CLK, MII_RXD[3:0],
* MII_RX_ER, MII_RX_DV, MII_CRS, MII_COL, MDC, MDIO
*/
lpc43_pin_config(PINCONF_ENET_MII_COL);
lpc43_pin_config(PINCONF_ENET_MII_CRS);
lpc43_pin_config(PINCONF_ENET_MII_RXD0);
lpc43_pin_config(PINCONF_ENET_MII_RXD1);
lpc43_pin_config(PINCONF_ENET_MII_RXD2);
lpc43_pin_config(PINCONF_ENET_MII_RXD3);
lpc43_pin_config(PINCONF_ENET_MII_RX_CLK);
lpc43_pin_config(PINCONF_ENET_MII_RX_DV);
lpc43_pin_config(PINCONF_ENET_MII_RX_ER);
lpc43_pin_config(PINCONF_ENET_MII_TXD0);
lpc43_pin_config(PINCONF_ENET_MII_TXD1);
lpc43_pin_config(PINCONF_ENET_MII_TXD2);
lpc43_pin_config(PINCONF_ENET_MII_TXD3);
lpc43_pin_config(PINCONF_ENET_MII_TX_CLK);
lpc43_pin_config(PINCONF_ENET_MII_TX_EN);
lpc43_pin_config(PINCONF_ENET_MII_TX_ER);
/* Set up the RMII interface. */
#elif defined(CONFIG_LPC43_RMII)
/* Select the RMII interface */
lpc43_selectrmii();
/* RMII interface pins (7):
*
* RMII_TXD[1:0], RMII_TX_EN, RMII_RXD[1:0], RMII_CRS_DV, MDC, MDIO,
* RMII_REF_CLK
*/
lpc43_pin_config(PINCONF_ENET_RX_DV);
lpc43_pin_config(PINCONF_ENET_REF_CLK);
lpc43_pin_config(PINCONF_ENET_RXD0);
lpc43_pin_config(PINCONF_ENET_RXD1);
lpc43_pin_config(PINCONF_ENET_TXD0);
lpc43_pin_config(PINCONF_ENET_TXD1);
lpc43_pin_config(PINCONF_ENET_TX_EN);
#ifdef PINCONF_ENET_RESET
lpc43_pin_config(PINCONF_ENET_RESET);
lpc43_gpio_config(GPIO_ENET_RESET);
lpc43_gpio_write(GPIO_ENET_RESET, 0);
up_mdelay(5);
lpc43_gpio_write(GPIO_ENET_RESET, 1);
up_mdelay(5);
#endif
#endif
#endif
}
/****************************************************************************
* Function: lpc43_ethreset
*
* Description:
* Reset the Ethernet block.
*
* Input Parameters:
* priv - A reference to the private driver state structure
*
* Returned Value:
* None.
*
* Assumptions:
*
****************************************************************************/
static void lpc43_ethreset(struct lpc43_ethmac_s *priv)
{
uint32_t regval;
lpc43_putreg(CCU_CLK_CFG_RUN | CCU_CLK_CFG_AUTO | CCU_CLK_CFG_WAKEUP,
LPC43_CCU1_M4_ETHERNET_CFG);
/* Reset the Ethernet */
lpc43_putreg(RGU_CTRL0_ETHERNET_RST, LPC43_RGU_CTRL0);
regval = lpc43_getreg(LPC43_ETH_DMABMODE);
regval |= ETH_DMABMODE_SWR;
lpc43_putreg(regval, LPC43_ETH_DMABMODE);
/* Wait for software reset to complete. The SR bit is cleared automatically
* after the reset operation has completed in all core clock domains.
*/
while ((lpc43_getreg(LPC43_ETH_DMABMODE) & ETH_DMABMODE_SWR) != 0);
}
/****************************************************************************
* Function: lpc43_macconfig
*
* Description:
* Configure the Ethernet MAC for DMA operation.
*
* Input Parameters:
* priv - A reference to the private driver state structure
*
* Returned Value:
* OK on success; Negated errno on failure.
*
* Assumptions:
*
****************************************************************************/
static int lpc43_macconfig(struct lpc43_ethmac_s *priv)
{
uint32_t regval;
/* Set up the MACCR register */
regval = lpc43_getreg(LPC43_ETH_MACCR);
regval &= ~MACCR_CLEAR_BITS;
regval |= MACCR_SET_BITS;
if (priv->fduplex)
{
/* Set the DM bit for full duplex support */
regval |= ETH_MACCFG_DM;
}
if (priv->mbps100)
{
/* Set the FES bit for 100Mbps fast ethernet support */
regval |= ETH_MACCFG_FES;
}
lpc43_putreg(regval, LPC43_ETH_MACCR);
/* Set up the MACFFR register */
regval = lpc43_getreg(LPC43_ETH_MACFFLT);
regval &= ~MACFFR_CLEAR_BITS;
regval |= MACFFR_SET_BITS;
lpc43_putreg(regval, LPC43_ETH_MACFFLT);
/* Set up the MACHTHR and MACHTLR registers */
lpc43_putreg(0, LPC43_ETH_MACHTHI);
lpc43_putreg(0, LPC43_ETH_MACHTLO);
/* Setup up the MACFCR register */
regval = lpc43_getreg(LPC43_ETH_MACFC);
regval &= ~MACFCR_CLEAR_MASK;
regval |= MACFCR_SET_MASK;
lpc43_putreg(regval, LPC43_ETH_MACFC);
/* Setup up the MACVLANTR register */
lpc43_putreg(0, LPC43_ETH_MACVLANT);
/* DMA Configuration */
/* Set up the DMAOMR register */
regval = lpc43_getreg(LPC43_ETH_DMAOPMODE);
regval &= ~DMAOMR_CLEAR_MASK;
regval |= DMAOMR_SET_MASK;
lpc43_putreg(regval, LPC43_ETH_DMAOPMODE);
/* Set up the DMABMR register */
regval = lpc43_getreg(LPC43_ETH_DMABMODE);
regval &= ~DMABMR_CLEAR_MASK;
regval |= DMABMR_SET_MASK;
lpc43_putreg(regval, LPC43_ETH_DMABMODE);
return OK;
}
/****************************************************************************
* Function: lpc43_macaddress
*
* Description:
* Configure the selected MAC address.
*
* Input Parameters:
* priv - A reference to the private driver state structure
*
* Returned Value:
* OK on success; Negated errno on failure.
*
* Assumptions:
*
****************************************************************************/
static void lpc43_macaddress(struct lpc43_ethmac_s *priv)
{
struct net_driver_s *dev = &priv->dev;
uint32_t regval;
ninfo("%s MAC: %02x:%02x:%02x:%02x:%02x:%02x\n",
dev->d_ifname,
dev->d_mac.ether.ether_addr_octet[0],
dev->d_mac.ether.ether_addr_octet[1],
dev->d_mac.ether.ether_addr_octet[2],
dev->d_mac.ether.ether_addr_octet[3],
dev->d_mac.ether.ether_addr_octet[4],
dev->d_mac.ether.ether_addr_octet[5]);
/* Set the MAC address high register */
regval = ((uint32_t)dev->d_mac.ether.ether_addr_octet[5] << 8) |
(uint32_t)dev->d_mac.ether.ether_addr_octet[4];
lpc43_putreg(regval, LPC43_ETH_MACA0HI);
/* Set the MAC address low register */
regval = ((uint32_t)dev->d_mac.ether.ether_addr_octet[3] << 24) |
((uint32_t)dev->d_mac.ether.ether_addr_octet[2] << 16) |
((uint32_t)dev->d_mac.ether.ether_addr_octet[1] << 8) |
(uint32_t)dev->d_mac.ether.ether_addr_octet[0];
lpc43_putreg(regval, LPC43_ETH_MACA0LO);
}
/****************************************************************************
* Function: lpc43_ipv6multicast
*
* Description:
* Configure the IPv6 multicast MAC address.
*
* Input Parameters:
* priv - A reference to the private driver state structure
*
* Returned Value:
* OK on success; Negated errno on failure.
*
* Assumptions:
*
****************************************************************************/
#ifdef CONFIG_NET_ICMPv6
static void lpc43_ipv6multicast(struct lpc43_ethmac_s *priv)
{
struct net_driver_s *dev;
uint16_t tmp16;
uint8_t mac[6];
/* For ICMPv6, we need to add the IPv6 multicast address
*
* For IPv6 multicast addresses, the Ethernet MAC is derived by
* the four low-order octets OR'ed with the MAC 33:33:00:00:00:00,
* so for example the IPv6 address FF02:DEAD:BEEF::1:3 would map
* to the Ethernet MAC address 33:33:00:01:00:03.
*
* NOTES: This appears correct for the ICMPv6 Router Solicitation
* Message, but the ICMPv6 Neighbor Solicitation message seems to
* use 33:33:ff:01:00:03.
*/
mac[0] = 0x33;
mac[1] = 0x33;
dev = &priv->dev;
tmp16 = dev->d_ipv6addr[6];
mac[2] = 0xff;
mac[3] = tmp16 >> 8;
tmp16 = dev->d_ipv6addr[7];
mac[4] = tmp16 & 0xff;
mac[5] = tmp16 >> 8;
ninfo("IPv6 Multicast: %02x:%02x:%02x:%02x:%02x:%02x\n",
mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
lpc43_addmac(dev, mac);
#ifdef CONFIG_NET_ICMPv6_AUTOCONF
/* Add the IPv6 all link-local nodes Ethernet address. This is the
* address that we expect to receive ICMPv6 Router Advertisement
* packets.
*/
lpc43_addmac(dev, g_ipv6_ethallnodes.ether_addr_octet);
#endif /* CONFIG_NET_ICMPv6_AUTOCONF */
#ifdef CONFIG_NET_ICMPv6_ROUTER
/* Add the IPv6 all link-local routers Ethernet address. This is the
* address that we expect to receive ICMPv6 Router Solicitation
* packets.
*/
lpc43_addmac(dev, g_ipv6_ethallrouters.ether_addr_octet);
#endif /* CONFIG_NET_ICMPv6_ROUTER */
}
#endif /* CONFIG_NET_ICMPv6 */
/****************************************************************************
* Function: lpc43_macenable
*
* Description:
* Enable normal MAC operation.
*
* Input Parameters:
* priv - A reference to the private driver state structure
*
* Returned Value:
* OK on success; Negated errno on failure.
*
* Assumptions:
*
****************************************************************************/
static int lpc43_macenable(struct lpc43_ethmac_s *priv)
{
uint32_t regval;
/* Set the MAC address */
lpc43_macaddress(priv);
#ifdef CONFIG_NET_ICMPv6
/* Set up the IPv6 multicast address */
lpc43_ipv6multicast(priv);
#endif
/* Enable transmit state machine of the MAC for transmission on the MII */
regval = lpc43_getreg(LPC43_ETH_MACCR);
regval |= ETH_MACCFG_TE;
lpc43_putreg(regval, LPC43_ETH_MACCR);
/* Flush Transmit FIFO */
regval = lpc43_getreg(LPC43_ETH_DMAOPMODE);
regval |= ETH_DMAOPMODE_FTF;
lpc43_putreg(regval, LPC43_ETH_DMAOPMODE);
/* Enable receive state machine of the MAC for reception from the MII */
/* Enables or disables the MAC reception. */
regval = lpc43_getreg(LPC43_ETH_MACCR);
regval |= ETH_MACCFG_RE;
lpc43_putreg(regval, LPC43_ETH_MACCR);
/* Start DMA transmission */
regval = lpc43_getreg(LPC43_ETH_DMAOPMODE);
regval |= ETH_DMAOPMODE_ST;
lpc43_putreg(regval, LPC43_ETH_DMAOPMODE);
/* Start DMA reception */
regval = lpc43_getreg(LPC43_ETH_DMAOPMODE);
regval |= ETH_DMAOPMODE_SR;
lpc43_putreg(regval, LPC43_ETH_DMAOPMODE);
/* Enable Ethernet DMA interrupts.
*
* The LPC43 hardware supports two interrupts: (1) one dedicated to normal
* Ethernet operations and the other, used only for the Ethernet wakeup
* event. The wake-up interrupt is not used by this driver.
*
* The first Ethernet vector is reserved for interrupts generated by the
* MAC and the DMA. The MAC provides PMT and time stamp trigger interrupts,
* neither of which are used by this driver.
*/
lpc43_putreg(ETH_MACIM_ALLINTS, LPC43_ETH_MACIM);
/* Ethernet DMA supports two classes of interrupts: Normal interrupt
* summary (NIS) and Abnormal interrupt summary (AIS) with a variety
* individual normal and abnormal interrupting events. Here only
* the normal receive event is enabled (unless DEBUG is enabled). Transmit
* events will only be enabled when a transmit interrupt is expected.
*/
lpc43_putreg((ETH_DMAINT_RECV_ENABLE | ETH_DMAINT_ERROR_ENABLE),
LPC43_ETH_DMAINTEN);
return OK;
}
/****************************************************************************
* Function: lpc43_ethconfig
*
* Description:
* Configure the Ethernet interface for DMA operation.
*
* Input Parameters:
* priv - A reference to the private driver state structure
*
* Returned Value:
* OK on success; Negated errno on failure.
*
* Assumptions:
*
****************************************************************************/
static int lpc43_ethconfig(struct lpc43_ethmac_s *priv)
{
int ret;
/* NOTE: The Ethernet clocks were initialized early in the boot-up
* sequence in lpc43_rcc.c.
*/
/* Reset the Ethernet block */
ninfo("Reset the Ethernet block\n");
lpc43_ethreset(priv);
/* Initialize the PHY */
ninfo("Initialize the PHY\n");
ret = lpc43_phyinit(priv);
if (ret < 0)
{
return ret;
}
/* Perform a software reset by setting the SR bit in the DMABMR register.
* This Resets all MAC subsystem internal registers and logic. After this
* reset all the registers holds their reset values.
*/
/* Initialize the MAC and DMA */
ninfo("Initialize the MAC and DMA\n");
ret = lpc43_macconfig(priv);
if (ret < 0)
{
return ret;
}
/* Initialize the free buffer list */
lpc43_initbuffer(priv);
/* Initialize TX Descriptors list: Chain Mode */
lpc43_txdescinit(priv);
/* Initialize RX Descriptors list: Chain Mode */
lpc43_rxdescinit(priv);
/* Enable normal MAC operation */
ninfo("Enable normal operation\n");
return lpc43_macenable(priv);
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Function: lpc43_ethinitialize
*
* Description:
* Initialize the Ethernet driver for one interface.
*
* Returned Value:
* OK on success; Negated errno on failure.
*
* Assumptions:
*
****************************************************************************/
static inline int lpc43_ethinitialize(void)
{
struct lpc43_ethmac_s *priv;
/* Get the interface structure associated with this interface number. */
priv = &g_lpc43ethmac;
/* Initialize the driver structure */
memset(priv, 0, sizeof(struct lpc43_ethmac_s));
priv->dev.d_ifup = lpc43_ifup; /* I/F up (new IP address) callback */
priv->dev.d_ifdown = lpc43_ifdown; /* I/F down callback */
priv->dev.d_txavail = lpc43_txavail; /* New TX data callback */
#ifdef CONFIG_NET_MCASTGROUP
priv->dev.d_addmac = lpc43_addmac; /* Add multicast MAC address */
priv->dev.d_rmmac = lpc43_rmmac; /* Remove multicast MAC address */
#endif
#ifdef CONFIG_NETDEV_IOCTL
priv->dev.d_ioctl = lpc43_ioctl; /* Support PHY ioctl() calls */
#endif
priv->dev.d_private = &g_lpc43ethmac; /* Used to recover private state from dev */
/* Configure GPIO pins to support Ethernet */
lpc43_ethgpioconfig(priv);
/* Attach the IRQ to the driver */
if (irq_attach(LPC43M4_IRQ_ETHERNET, lpc43_interrupt, NULL))
{
/* We could not attach the ISR to the interrupt */
return -EAGAIN;
}
/* Put the interface in the down state. */
lpc43_ifdown(&priv->dev);
/* Register the device with the OS so that socket IOCTLs can be performed */
netdev_register(&priv->dev, NET_LL_ETHERNET);
return OK;
}
/****************************************************************************
* Function: arm_netinitialize
*
* Description:
* This is the "standard" network initialization logic called from the
* low-level initialization logic in arm_initialize.c.
*
* Input Parameters:
* None.
*
* Returned Value:
* None.
*
* Assumptions:
*
****************************************************************************/
#ifndef CONFIG_NETDEV_LATEINIT
void arm_netinitialize(void)
{
lpc43_ethinitialize();
}
#endif
#endif /* CONFIG_NET && CONFIG_LPC43_ETHERNET */