diff options
Diffstat (limited to 'nuttx/arch/arm/src/stm32/stm32_eth.c')
| -rw-r--r-- | nuttx/arch/arm/src/stm32/stm32_eth.c | 3109 |
1 files changed, 3109 insertions, 0 deletions
diff --git a/nuttx/arch/arm/src/stm32/stm32_eth.c b/nuttx/arch/arm/src/stm32/stm32_eth.c new file mode 100644 index 000000000..68ee78fd5 --- /dev/null +++ b/nuttx/arch/arm/src/stm32/stm32_eth.c @@ -0,0 +1,3109 @@ +/**************************************************************************** + * arch/arm/src/stm32/stm32_eth.c + * + * Copyright (C) 2011-2012 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> +#if defined(CONFIG_NET) && defined(CONFIG_STM32_ETHMAC) + +#include <stdint.h> +#include <stdbool.h> +#include <time.h> +#include <string.h> +#include <debug.h> +#include <wdog.h> +#include <queue.h> +#include <errno.h> + +#include <nuttx/irq.h> +#include <nuttx/arch.h> +#include <nuttx/net/mii.h> + +#include <nuttx/net/uip/uip.h> +#include <nuttx/net/uip/uip-arp.h> +#include <nuttx/net/uip/uip-arch.h> + +#include "up_internal.h" + +#include "chip.h" +#include "stm32_gpio.h" +#include "stm32_rcc.h" +#include "stm32_syscfg.h" +#include "stm32_eth.h" + +#include <arch/board/board.h> + +/* STM32_NETHERNET determines the number of physical interfaces + * that will be supported. + */ + +#if STM32_NETHERNET > 0 + +/**************************************************************************** + * Definitions + ****************************************************************************/ +/* Configuration ************************************************************/ +/* See configs/stm3240g-eval/README.txt for an explanation of the configuration + * settings. + */ + +#if STM32_NETHERNET > 1 +# error "Logic to support multiple Ethernet interfaces is incomplete" +#endif + +#ifndef CONFIG_STM32_SYSCFG +# error "CONFIG_STM32_SYSCFG must be defined in the NuttX configuration" +#endif + +#ifndef CONFIG_STM32_PHYADDR +# error "CONFIG_STM32_PHYADDR must be defined in the NuttX configuration" +#endif + +#if !defined(CONFIG_STM32_MII) && !defined(CONFIG_STM32_RMII) +# warning "Neither CONFIG_STM32_MII nor CONFIG_STM32_RMII defined" +#endif + +#if defined(CONFIG_STM32_MII) && defined(CONFIG_STM32_RMII) +# error "Both CONFIG_STM32_MII and CONFIG_STM32_RMII defined" +#endif + +#ifdef CONFIG_STM32_MII +# if !defined(CONFIG_STM32_MII_MCO1) && !defined(CONFIG_STM32_MII_MCO2) +# warning "Neither CONFIG_STM32_MII_MCO1 nor CONFIG_STM32_MII_MCO2 defined" +# endif +# if defined(CONFIG_STM32_MII_MCO1) && defined(CONFIG_STM32_MII_MCO2) +# error "Both CONFIG_STM32_MII_MCO1 and CONFIG_STM32_MII_MCO2 defined" +# endif +#endif + +#ifdef CONFIG_STM32_AUTONEG +# ifndef CONFIG_STM32_PHYSR +# error "CONFIG_STM32_PHYSR must be defined in the NuttX configuration" +# endif +# ifndef CONFIG_STM32_PHYSR_SPEED +# error "CONFIG_STM32_PHYSR_SPEED must be defined in the NuttX configuration" +# endif +# ifndef CONFIG_STM32_PHYSR_100MBPS +# error "CONFIG_STM32_PHYSR_100MBPS must be defined in the NuttX configuration" +# endif +# ifndef CONFIG_STM32_PHYSR_MODE +# error "CONFIG_STM32_PHYSR_MODE must be defined in the NuttX configuration" +# endif +# ifndef CONFIG_STM32_PHYSR_FULLDUPLEX +# error "CONFIG_STM32_PHYSR_FULLDUPLEX must be defined in the NuttX configuration" +# endif +#endif + +#ifdef CONFIG_STM32_ETH_PTP +# warning "CONFIG_STM32_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_STM32_ETH_ENHANCEDDESC +#undef CONFIG_STM32_ETH_HWCHECKSUM + +/* Ethernet buffer sizes, number of buffers, and number of descriptors */ + +#ifndef CONFIG_NET_MULTIBUFFER +# error "CONFIG_NET_MULTIBUFFER is required" +#endif + +/* Add 4 to the configured buffer size to account for the 2 byte checksum + * memory needed at the end of the maximum size packet. + */ + +#define OPTIMAL_ETH_BUFSIZE (CONFIG_NET_BUFSIZE+4) + +#ifndef CONFIG_STM32_ETH_BUFSIZE +# define CONFIG_STM32_ETH_BUFSIZE OPTIMAL_ETH_BUFSIZE +#endif + +#if CONFIG_STM32_ETH_BUFSIZE > ETH_TDES1_TBS1_MASK +# error "CONFIG_STM32_ETH_BUFSIZE is too large" +#endif + +#if CONFIG_STM32_ETH_BUFSIZE != OPTIMAL_ETH_BUFSIZE +# warning "You using an incomplete/untested configuration" +#endif + +#ifndef CONFIG_STM32_ETH_NRXDESC +# define CONFIG_STM32_ETH_NRXDESC 8 +#endif +#ifndef CONFIG_STM32_ETH_NTXDESC +# define CONFIG_STM32_ETH_NTXDESC 4 +#endif + +/* We need at least one more free buffer than transmit buffers */ + +#define STM32_ETH_NFREEBUFFERS (CONFIG_STM32_ETH_NTXDESC+1) + +/* Extremely detailed register debug that you would normally never want + * enabled. + */ + +#ifndef CONFIG_DEBUG +# undef CONFIG_STM32_ETHMAC_REGDEBUG +#endif + +/* Clocking *****************************************************************/ +/* Set MACMIIAR CR bits depending on HCLK setting */ + +#if STM32_HCLK_FREQUENCY >= 20000000 && STM32_HCLK_FREQUENCY < 35000000 +# define ETH_MACMIIAR_CR ETH_MACMIIAR_CR_20_35 +#elif STM32_HCLK_FREQUENCY >= 35000000 && STM32_HCLK_FREQUENCY < 60000000 +# define ETH_MACMIIAR_CR ETH_MACMIIAR_CR_35_60 +#elif STM32_HCLK_FREQUENCY >= 60000000 && STM32_HCLK_FREQUENCY < 100000000 +# define ETH_MACMIIAR_CR ETH_MACMIIAR_CR_60_100 +#elif STM32_HCLK_FREQUENCY >= 100000000 && STM32_HCLK_FREQUENCY < 150000000 +# define ETH_MACMIIAR_CR ETH_MACMIIAR_CR_100_150 +#elif STM32_HCLK_FREQUENCY >= 150000000 && STM32_HCLK_FREQUENCY <= 168000000 +# define ETH_MACMIIAR_CR ETH_MACMIIAR_CR_150_168 +#else +# error "STM32_HCLK_FREQUENCY not supportable" +#endif + +/* Timing *******************************************************************/ +/* TX poll delay = 1 seconds. CLK_TCK is the number of clock ticks per + * second + */ + +#define STM32_WDDELAY (1*CLK_TCK) +#define STM32_POLLHSEC (1*2) + +/* TX timeout = 1 minute */ + +#define STM32_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_MACCR_RE Bit 2: Receiver enable + * ETH_MACCR_TE Bit 3: Transmitter enable + * ETH_MACCR_DC Bit 4: Deferral check + * ETH_MACCR_BL Bits 5-6: Back-off limit + * ETH_MACCR_APCS Bit 7: Automatic pad/CRC stripping + * ETH_MACCR_RD Bit 9: Retry disable + * ETH_MACCR_IPCO Bit 10: IPv4 checksum offload + * ETH_MACCR_DM Bit 11: Duplex mode + * ETH_MACCR_LM Bit 12: Loopback mode + * ETH_MACCR_ROD Bit 13: Receive own disable + * ETH_MACCR_FES Bit 14: Fast Ethernet speed + * ETH_MACCR_CSD Bit 16: Carrier sense disable + * ETH_MACCR_IFG Bits 17-19: Interframe gap + * ETH_MACCR_JD Bit 22: Jabber disable + * ETH_MACCR_WD Bit 23: Watchdog disable + * ETH_MACCR_CSTF Bits 25: CRC stripping for Type frames + */ + +#define MACCR_CLEAR_BITS \ + ( ETH_MACCR_RE | ETH_MACCR_TE | ETH_MACCR_DC | ETH_MACCR_BL_MASK | \ + ETH_MACCR_APCS | ETH_MACCR_RD | ETH_MACCR_IPCO | ETH_MACCR_DM | \ + ETH_MACCR_LM | ETH_MACCR_ROD | ETH_MACCR_FES | ETH_MACCR_CSD | \ + ETH_MACCR_IFG_MASK | ETH_MACCR_JD | ETH_MACCR_WD | ETH_MACCR_CSTF ) + +/* The following bits are set or left zero unconditionally in all modes. + * + * ETH_MACCR_RE Receiver enable 0 (disabled) + * ETH_MACCR_TE Transmitter enable 0 (disabled) + * ETH_MACCR_DC Deferral check 0 (disabled) + * ETH_MACCR_BL Back-off limit 0 (10) + * ETH_MACCR_APCS Automatic pad/CRC stripping 0 (disabled) + * ETH_MACCR_RD Retry disable 1 (disabled) + * ETH_MACCR_IPCO IPv4 checksum offload Depends on CONFIG_STM32_ETH_HWCHECKSUM + * ETH_MACCR_LM Loopback mode 0 (disabled) + * ETH_MACCR_ROD Receive own disable 0 (enabled) + * ETH_MACCR_CSD Carrier sense disable 0 (enabled) + * ETH_MACCR_IFG Interframe gap 0 (96 bits) + * ETH_MACCR_JD Jabber disable 0 (enabled) + * ETH_MACCR_WD Watchdog disable 0 (enabled) + * ETH_MACCR_CSTF CRC stripping for Type frames 0 (disabled) + * + * The following are set conditioinally based on mode and speed. + * + * ETH_MACCR_DM Duplex mode Depends on priv->fduplex + * ETH_MACCR_FES Fast Ethernet speed Depends on priv->mbps100 + */ + +#ifdef CONFIG_STM32_ETH_HWCHECKSUM +# define MACCR_SET_BITS \ + (ETH_MACCR_BL_10 | ETH_MACCR_RD | ETH_MACCR_IPCO | ETH_MACCR_IFG(96)) +#else +# define MACCR_SET_BITS \ + (ETH_MACCR_BL_10 | ETH_MACCR_RD | ETH_MACCR_IFG(96)) +#endif + +/* 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_MACFFR_PM | ETH_MACFFR_HU | ETH_MACFFR_HM | ETH_MACFFR_DAIF | \ + ETH_MACFFR_PAM | ETH_MACFFR_BFD | ETH_MACFFR_PCF_MASK | ETH_MACFFR_SAIF | \ + ETH_MACFFR_SAF | ETH_MACFFR_HPF | ETH_MACFFR_RA) + +/* The following bits are set or left zero unconditionally in all modes. + * + * ETH_MACFFR_PM Promiscuous mode 0 (disabled) + * ETH_MACFFR_HU Hash unicast 0 (perfect dest filtering) + * ETH_MACFFR_HM Hash multicast 0 (perfect dest filtering) + * ETH_MACFFR_DAIF Destination address inverse filtering 0 (normal) + * ETH_MACFFR_PAM Pass all multicast 0 (Depends on HM bit) + * ETH_MACFFR_BFD Broadcast frames disable 0 (enabled) + * ETH_MACFFR_PCF Pass control frames 1 (block all but PAUSE) + * ETH_MACFFR_SAIF Source address inverse filtering 0 (not used) + * ETH_MACFFR_SAF Source address filter 0 (disabled) + * ETH_MACFFR_HPF Hash or perfect filter 0 (Only matching frames passed) + * ETH_MACFFR_RA Receive all 0 (disabled) + */ + +#define MACFFR_SET_BITS (ETH_MACFFR_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_MACFCR_FCB_BPA | ETH_MACFCR_TFCE | ETH_MACFCR_RFCE | ETH_MACFCR_UPFD | \ + ETH_MACFCR_PLT_MASK | ETH_MACFCR_ZQPD | ETH_MACFCR_PT_MASK) + +/* The following bits are set or left zero unconditionally in all modes. + * + * ETH_MACFCR_FCB_BPA Flow control busy/back pressure activate 0 (no pause control frame) + * 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_MACFCR_PLT_M4 | ETH_MACFCR_ZQPD) + +/* 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_DMAOMR_SR Bit 1: Start/stop receive + * TH_DMAOMR_OSF Bit 2: Operate on second frame + * ETH_DMAOMR_RTC Bits 3-4: Receive threshold control + * ETH_DMAOMR_FUGF Bit 6: Forward undersized good frames + * ETH_DMAOMR_FEF Bit 7: Forward error frames + * ETH_DMAOMR_ST Bit 13: Start/stop transmission + * ETH_DMAOMR_TTC Bits 14-16: Transmit threshold control + * ETH_DMAOMR_FTF Bit 20: Flush transmit FIFO + * ETH_DMAOMR_TSF Bit 21: Transmit store and forward + * ETH_DMAOMR_DFRF Bit 24: Disable flushing of received frames + * ETH_DMAOMR_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_DMAOMR_SR | ETH_DMAOMR_OSF | ETH_DMAOMR_RTC_MASK | ETH_DMAOMR_FUGF | \ + ETH_DMAOMR_FEF | ETH_DMAOMR_ST | ETH_DMAOMR_TTC_MASK | ETH_DMAOMR_FTF | \ + ETH_DMAOMR_TSF | ETH_DMAOMR_DFRF | ETH_DMAOMR_RSF | ETH_DMAOMR_DTCEFD) + +/* The following bits are set or left zero unconditionally in all modes. + * + * ETH_DMAOMR_SR Start/stop receive 0 (not running) + * TH_DMAOMR_OSF Operate on second frame 1 (enabled) + * ETH_DMAOMR_RTC Receive threshold control 0 (64 bytes) + * ETH_DMAOMR_FUGF Forward undersized good frames 0 (disabled) + * ETH_DMAOMR_FEF Forward error frames 0 (disabled) + * ETH_DMAOMR_ST Start/stop transmission 0 (not running) + * ETH_DMAOMR_TTC Transmit threshold control 0 (64 bytes) + * ETH_DMAOMR_FTF Flush transmit FIFO 0 (no flush) + * ETH_DMAOMR_TSF Transmit store and forward Depends on CONFIG_STM32_ETH_HWCHECKSUM + * ETH_DMAOMR_DFRF Disable flushing of received frames 0 (enabled) + * ETH_DMAOMR_RSF Receive store and forward Depends on CONFIG_STM32_ETH_HWCHECKSUM + * TH_DMAOMR_DTCEFD Dropping of TCP/IP checksum error Depends on CONFIG_STM32_ETH_HWCHECKSUM + * frames disable + * + * 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 + */ + +#if CONFIG_STM32_ETH_HWCHECKSUM +# define DMAOMR_SET_MASK \ + (ETH_DMAOMR_OSF | ETH_DMAOMR_RTC_64 | ETH_DMAOMR_TTC_64 | \ + ETH_DMAOMR_TSF | ETH_DMAOMR_RSF) +#else +# define DMAOMR_SET_MASK \ + (ETH_DMAOMR_OSF | ETH_DMAOMR_RTC_64 | ETH_DMAOMR_TTC_64 | \ + ETH_DMAOMR_DTCEFD) +#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_DMABMR_SR Bit 0: Software reset + * ETH_DMABMR_DA Bit 1: DMA Arbitration + * ETH_DMABMR_DSL Bits 2-6: Descriptor skip length + * ETH_DMABMR_EDFE Bit 7: Enhanced descriptor format enable + * ETH_DMABMR_PBL Bits 8-13: Programmable burst length + * ETH_DMABMR_RTPR Bits 14-15: RX TX priority ratio + * ETH_DMABMR_FB Bit 16: Fixed burst + * ETH_DMABMR_RDP Bits 17-22: RX DMA PBL + * ETH_DMABMR_USP Bit 23: Use separate PBL + * ETH_DMABMR_FPM Bit 24: 4xPBL mode + * ETH_DMABMR_AAB Bit 25: Address-aligned beats + * ETH_DMABMR_MB Bit 26: Mixed burst + */ + +#define DMABMR_CLEAR_MASK \ + (ETH_DMABMR_SR | ETH_DMABMR_DA | ETH_DMABMR_DSL_MASK | ETH_DMABMR_EDFE | \ + ETH_DMABMR_PBL_MASK | ETH_DMABMR_RTPR_MASK | ETH_DMABMR_FB | ETH_DMABMR_RDP_MASK | \ + ETH_DMABMR_USP | ETH_DMABMR_FPM | ETH_DMABMR_AAB | ETH_DMABMR_MB) + +/* The following bits are set or left zero unconditionally in all modes. + * + * + * ETH_DMABMR_SR Software reset 0 (no reset) + * ETH_DMABMR_DA DMA Arbitration 0 (round robin) + * ETH_DMABMR_DSL Descriptor skip length 0 + * ETH_DMABMR_EDFE Enhanced descriptor format enable Depends on CONFIG_STM32_ETH_ENHANCEDDESC + * ETH_DMABMR_PBL Programmable burst length 32 beats + * ETH_DMABMR_RTPR RX TX priority ratio 2:1 + * ETH_DMABMR_FB Fixed burst 1 (enabled) + * ETH_DMABMR_RDP RX DMA PBL 32 beats + * ETH_DMABMR_USP Use separate PBL 1 (enabled) + * ETH_DMABMR_FPM 4xPBL mode 0 (disabled) + * ETH_DMABMR_AAB Address-aligned beats 1 (enabled) + * ETH_DMABMR_MB Mixed burst 0 (disabled) + */ + +#ifdef CONFIG_STM32_ETH_ENHANCEDDESC +# define DMABMR_SET_MASK \ + (ETH_DMABMR_DSL(0) | ETH_DMABMR_PBL(32) | ETH_DMABMR_EDFE | ETH_DMABMR_RTPR_2TO1 | \ + ETH_DMABMR_FB | ETH_DMABMR_RDP(32) | ETH_DMABMR_USP | ETH_DMABMR_AAB) +#else +# define DMABMR_SET_MASK \ + (ETH_DMABMR_DSL(0) | ETH_DMABMR_PBL(32) | ETH_DMABMR_RTPR_2TO1 | ETH_DMABMR_FB | \ + ETH_DMABMR_RDP(32) | ETH_DMABMR_USP | ETH_DMABMR_AAB) +#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_TBUI |ETH_DMAINT_RI | ETH_DMAINT_ERI) + +#define ETH_DMAINT_ABNORMAL \ + (ETH_DMAINT_TPSI | ETH_DMAINT_TJTI | ETH_DMAINT_ROI | ETH_DMAINT_TUI | \ + ETH_DMAINT_RBUI | ETH_DMAINT_RPSI | ETH_DMAINT_RWTI | /* ETH_DMAINT_ETI | */ \ + ETH_DMAINT_FBEI) + +/* 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 uip_eth_hdr *)priv->dev.d_buf) + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/* The stm32_ethmac_s encapsulates all state information for a single hardware + * interface + */ + +struct stm32_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 */ + WDOG_ID txpoll; /* TX poll timer */ + WDOG_ID txtimeout; /* TX timeout timer */ + + /* This holds the information visible to uIP/NuttX */ + + struct uip_driver_s dev; /* Interface understood by uIP */ + + /* 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_STM32_ETH_NRXDESC]; + struct eth_txdesc_s txtable[CONFIG_STM32_ETH_NTXDESC]; + + /* Buffer allocations */ + + uint8_t rxbuffer[CONFIG_STM32_ETH_NRXDESC*CONFIG_STM32_ETH_BUFSIZE]; + uint8_t alloc[STM32_ETH_NFREEBUFFERS*CONFIG_STM32_ETH_BUFSIZE]; +}; + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +static struct stm32_ethmac_s g_stm32ethmac[STM32_NETHERNET]; + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ +/* Register operations ******************************************************/ + +#if defined(CONFIG_STM32_ETHMAC_REGDEBUG) && defined(CONFIG_DEBUG) +static uint32_t stm32_getreg(uint32_t addr); +static void stm32_putreg(uint32_t val, uint32_t addr); +static void stm32_checksetup(void); +#else +# define stm32_getreg(addr) getreg32(addr) +# define stm32_putreg(val,addr) putreg32(val,addr) +# define stm32_checksetup() +#endif + +/* Free buffer management */ + +static void stm32_initbuffer(FAR struct stm32_ethmac_s *priv); +static inline uint8_t *stm32_allocbuffer(FAR struct stm32_ethmac_s *priv); +static inline void stm32_freebuffer(FAR struct stm32_ethmac_s *priv, uint8_t *buffer); +static inline bool stm32_isfreebuffer(FAR struct stm32_ethmac_s *priv); + +/* Common TX logic */ + +static int stm32_transmit(FAR struct stm32_ethmac_s *priv); +static int stm32_uiptxpoll(struct uip_driver_s *dev); +static void stm32_dopoll(FAR struct stm32_ethmac_s *priv); + +/* Interrupt handling */ + +static void stm32_enableint(FAR struct stm32_ethmac_s *priv, uint32_t ierbit); +static void stm32_disableint(FAR struct stm32_ethmac_s *priv, uint32_t ierbit); + +static void stm32_freesegment(FAR struct stm32_ethmac_s *priv, + FAR struct eth_rxdesc_s *rxfirst, int segments); +static int stm32_recvframe(FAR struct stm32_ethmac_s *priv); +static void stm32_receive(FAR struct stm32_ethmac_s *priv); +static void stm32_freeframe(FAR struct stm32_ethmac_s *priv); +static void stm32_txdone(FAR struct stm32_ethmac_s *priv); +static int stm32_interrupt(int irq, FAR void *context); + +/* Watchdog timer expirations */ + +static void stm32_polltimer(int argc, uint32_t arg, ...); +static void stm32_txtimeout(int argc, uint32_t arg, ...); + +/* NuttX callback functions */ + +static int stm32_ifup(struct uip_driver_s *dev); +static int stm32_ifdown(struct uip_driver_s *dev); +static int stm32_txavail(struct uip_driver_s *dev); +#ifdef CONFIG_NET_IGMP +static int stm32_addmac(struct uip_driver_s *dev, FAR const uint8_t *mac); +static int stm32_rmmac(struct uip_driver_s *dev, FAR const uint8_t *mac); +#endif + +/* Descriptor Initialization */ + +static void stm32_txdescinit(FAR struct stm32_ethmac_s *priv); +static void stm32_rxdescinit(FAR struct stm32_ethmac_s *priv); + +/* PHY Initialization */ + +static int stm32_phyread(uint16_t phydevaddr, uint16_t phyregaddr, uint16_t *value); +static int stm32_phywrite(uint16_t phydevaddr, uint16_t phyregaddr, uint16_t value); +static int stm32_phyinit(FAR struct stm32_ethmac_s *priv); + +/* MAC/DMA Initialization */ + +static inline void stm32_ethgpioconfig(FAR struct stm32_ethmac_s *priv); +static void stm32_ethreset(FAR struct stm32_ethmac_s *priv); +static int stm32_macconfig(FAR struct stm32_ethmac_s *priv); +static void stm32_macaddress(FAR struct stm32_ethmac_s *priv); +static int stm32_macenable(FAR struct stm32_ethmac_s *priv); +static int stm32_ethconfig(FAR struct stm32_ethmac_s *priv); + +/**************************************************************************** + * Private Functions + ****************************************************************************/ +/**************************************************************************** + * Name: stm32_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 + * + ****************************************************************************/ + +#if defined(CONFIG_STM32_ETHMAC_REGDEBUG) && defined(CONFIG_DEBUG) +static uint32_t stm32_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) + { + lldbg("...\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 */ + + lldbg("[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 */ + + lldbg("%08x->%08x\n", addr, val); + return val; +} +#endif + +/**************************************************************************** + * Name: stm32_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 + * + ****************************************************************************/ + +#if defined(CONFIG_STM32_ETHMAC_REGDEBUG) && defined(CONFIG_DEBUG) +static void stm32_putreg(uint32_t val, uint32_t addr) +{ + /* Show the register value being written */ + + lldbg("%08x<-%08x\n", addr, val); + + /* Write the value */ + + putreg32(val, addr); +} +#endif + +/**************************************************************************** + * Name: stm32_checksetup + * + * Description: + * Show the state of critical configuration registers. + * + * Input Parameters: + * None + * + * Returned Value: + * None + * + ****************************************************************************/ + +#if defined(CONFIG_STM32_ETHMAC_REGDEBUG) && defined(CONFIG_DEBUG) +static void stm32_checksetup(void) +{ +} +#endif + +/**************************************************************************** + * Function: stm32_initbuffer + * + * Description: + * Initialize the free buffer list. + * + * Parameters: + * priv - Reference to the driver state structure + * + * Returned Value: + * None + * + * Assumptions: + * Called during early driver initialization before Ethernet interrupts + * are enabled. + * + ****************************************************************************/ + +static void stm32_initbuffer(FAR struct stm32_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 < STM32_ETH_NFREEBUFFERS; + i++, buffer += CONFIG_STM32_ETH_BUFSIZE) + { + sq_addlast((FAR sq_entry_t *)buffer, &priv->freeb); + } +} + +/**************************************************************************** + * Function: stm32_allocbuffer + * + * Description: + * Allocate one buffer from the free buffer list. + * + * 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 *stm32_allocbuffer(FAR struct stm32_ethmac_s *priv) +{ + /* Allocate a buffer by returning the head of the free buffer list */ + + return (uint8_t *)sq_remfirst(&priv->freeb); +} + +/**************************************************************************** + * Function: stm32_freebuffer + * + * Description: + * Return a buffer to the free buffer list. + * + * 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 stm32_freebuffer(FAR struct stm32_ethmac_s *priv, uint8_t *buffer) +{ + /* Free the buffer by adding it to to the end of the free buffer list */ + + sq_addlast((FAR sq_entry_t *)buffer, &priv->freeb); +} + +/**************************************************************************** + * Function: stm32_isfreebuffer + * + * Description: + * Return TRUE if the free buffer list is not empty. + * + * 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 stm32_isfreebuffer(FAR struct stm32_ethmac_s *priv) +{ + /* Return TRUE if the free buffer list is not empty */ + + return !sq_empty(&priv->freeb); +} + +/**************************************************************************** + * Function: stm32_transmit + * + * Description: + * Start hardware transmission. Called either from the txdone interrupt + * handling or from watchdog based polling. + * + * 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 stm32_transmit(FAR struct stm32_ethmac_s *priv) +{ + struct eth_txdesc_s *txdesc; + struct eth_txdesc_s *txfirst; + + /* The internal (optimal) uIP buffer size may be configured to be larger + * than the Ethernet buffer size. + */ + +#if OPTIMAL_ETH_BUFSIZE > CONFIG_STM32_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; + + nllvdbg("d_len: %d d_buf: %p txhead: %p tdes0: %08x\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_STM32_ETH_BUFSIZE + if (priv->dev.d_len > CONFIG_STM32_ETH_BUFSIZE) + { + /* Yes... how many buffers will be need to send the packet? */ + + bufcount = (priv->dev.d_len + (CONFIG_STM32_ETH_BUFSIZE-1)) / CONFIG_STM32_ETH_BUFSIZE; + lastsize = priv->dev.d_len - (bufcount - 1) * CONFIG_STM32_ETH_BUFSIZE; + + nllvdbg("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 segement 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_STM32_ETH_BUFSIZE; + buffer += CONFIG_STM32_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_BUFSIZE); + 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++; + + nllvdbg("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_STM32_ETH_NTXDESC) + { + stm32_disableint(priv, ETH_DMAINT_RI); + } + + /* Check if the TX Buffer unavailable flag is set */ + + if ((stm32_getreg(STM32_ETH_DMASR) & ETH_DMAINT_TBUI) != 0) + { + /* Clear TX Buffer unavailable flag */ + + stm32_putreg(ETH_DMAINT_TBUI, STM32_ETH_DMASR); + + /* Resume DMA transmission */ + + stm32_putreg(0, STM32_ETH_DMATPDR); + } + + /* Enable TX interrupts */ + + stm32_enableint(priv, ETH_DMAINT_TI); + + /* Setup the TX timeout watchdog (perhaps restarting the timer) */ + + (void)wd_start(priv->txtimeout, STM32_TXTIMEOUT, stm32_txtimeout, 1, (uint32_t)priv); + return OK; +} + +/**************************************************************************** + * Function: stm32_uiptxpoll + * + * Description: + * The transmitter is available, check if uIP has any outgoing packets ready + * to send. This is a callback from uip_poll(). uip_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 + * + * 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 stm32_uiptxpoll(struct uip_driver_s *dev) +{ + FAR struct stm32_ethmac_s *priv = (FAR struct stm32_ethmac_s *)dev->d_private; + + DEBUGASSERT(priv->dev.d_buf != NULL); + + /* If the polling resulted in data that should be sent out on the network, + * the field d_len is set to a value > 0. + */ + + if (priv->dev.d_len > 0) + { + /* Send the packet */ + + uip_arp_out(&priv->dev); + stm32_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 stm32_freeframe() has not yet run. If stm32_freeframe() has run, + * the buffer1 pointer (tdes2) will be nullified (and inflight should be < + * CONFIG_STM32_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 = stm32_allocbuffer(priv); + + /* We can't continue the poll if we have no buffers */ + + if (dev->d_buf == NULL) + { + /* Terminate the poll. */ + + return -ENOMEM; + } + } + + /* If zero is returned, the polling will continue until all connections have + * been examined. + */ + + return 0; +} + +/**************************************************************************** + * Function: stm32_dopoll + * + * Description: + * The function is called when a frame is received using the DMA receive + * interrupt. It scans the RX descriptors to the the received frame. + * + * Parameters: + * priv - Reference to the driver state structure + * + * Returned Value: + * None + * + * Assumptions: + * Global interrupts are disabled by interrupt handling logic. + * + ****************************************************************************/ + +static void stm32_dopoll(FAR struct stm32_ethmac_s *priv) +{ + FAR struct uip_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 stm32_freeframe() has not yet run. If stm32_freeframe() has run, + * the buffer1 pointer (tdes2) will be nullified (and inflight should be < + * CONFIG_STM32_ETH_NTXDESC). + */ + + if ((priv->txhead->tdes0 & ETH_TDES0_OWN) == 0 && + priv->txhead->tdes2 == 0) + { + /* If we have the descriptor, then poll uIP for new XMIT data. + * Allocate a buffer for the poll. + */ + + DEBUGASSERT(dev->d_len == 0 && dev->d_buf == NULL); + dev->d_buf = stm32_allocbuffer(priv); + + /* We can't poll if we have no buffers */ + + if (dev->d_buf) + { + (void)uip_poll(dev, stm32_uiptxpoll); + + /* 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); + stm32_freebuffer(priv, dev->d_buf); + dev->d_buf = NULL; + } + } + } +} + +/**************************************************************************** + * Function: stm32_enableint + * + * Description: + * Enable a "normal" interrupt + * + * Parameters: + * priv - Reference to the driver state structure + * + * Returned Value: + * None + * + * Assumptions: + * Global interrupts are disabled by interrupt handling logic. + * + ****************************************************************************/ + +static void stm32_enableint(FAR struct stm32_ethmac_s *priv, uint32_t ierbit) +{ + uint32_t regval; + + /* Enable the specified "normal" interrupt */ + + regval = stm32_getreg(STM32_ETH_DMAIER); + regval |= (ETH_DMAINT_NIS | ierbit); + stm32_putreg(regval, STM32_ETH_DMAIER); +} + +/**************************************************************************** + * Function: stm32_disableint + * + * Description: + * Disable a normal interrupt. + * + * Parameters: + * priv - Reference to the driver state structure + * + * Returned Value: + * None + * + * Assumptions: + * Global interrupts are disabled by interrupt handling logic. + * + ****************************************************************************/ + +static void stm32_disableint(FAR struct stm32_ethmac_s *priv, uint32_t ierbit) +{ + uint32_t regval; + + /* Disable the "normal" interrupt */ + + regval = stm32_getreg(STM32_ETH_DMAIER); + regval &= ~ierbit; + + /* Are all "normal" interrupts now disabled? */ + + if ((regval & ETH_DMAINT_NORMAL) == 0) + { + /* Yes.. disable normal interrupts */ + + regval &= ~ETH_DMAINT_NIS; + } + + stm32_putreg(regval, STM32_ETH_DMAIER); +} + +/**************************************************************************** + * Function: stm32_freesegment + * + * Description: + * The function is called when a frame is received using the DMA receive + * interrupt. It scans the RX descriptors to the the received frame. + * + * Parameters: + * priv - Reference to the driver state structure + * + * Returned Value: + * None + * + * Assumptions: + * Global interrupts are disabled by interrupt handling logic. + * + ****************************************************************************/ + +static void stm32_freesegment(FAR struct stm32_ethmac_s *priv, + FAR struct eth_rxdesc_s *rxfirst, int segments) +{ + struct eth_rxdesc_s *rxdesc; + int i; + + nllvdbg("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 managment logic */ + + priv->rxcurr = NULL; + priv->segments = 0; + + /* Check if the RX Buffer unavailable flag is set */ + + if ((stm32_getreg(STM32_ETH_DMASR) & ETH_DMAINT_RBUI) != 0) + { + /* Clear RBUS Ethernet DMA flag */ + + stm32_putreg(ETH_DMAINT_RBUI, STM32_ETH_DMASR); + + /* Resume DMA reception */ + + stm32_putreg(0, STM32_ETH_DMARPDR); + } +} + +/**************************************************************************** + * Function: stm32_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. + * + * 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 stm32_recvframe(FAR struct stm32_ethmac_s *priv) +{ + struct eth_rxdesc_s *rxdesc; + struct eth_rxdesc_s *rxcurr; + uint8_t *buffer; + int i; + + nllvdbg("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 (!stm32_isfreebuffer(priv)) + { + nlldbg("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 transmisson. 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_STM32_ETH_NRXDESC && + priv->inflight < CONFIG_STM32_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++; + + nllvdbg("rxhead: %p rxcurr: %p segments: %d\n", + priv->rxhead, priv->rxcurr, priv->segments); + + /* Check if the there is only one segment in the frame */ + + if (priv->segments == 1) + { + rxcurr = rxdesc; + } + else + { + rxcurr = priv->rxcurr; + } + + /* Check if any errors are reported in the frame */ + + if ((rxdesc->rdes0 & ETH_RDES0_ES) == 0) + { + struct uip_driver_s *dev = &priv->dev; + + /* Get the Frame Length of the received packet: substruct 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 the free + * list is not empty above. + */ + + buffer = stm32_allocbuffer(priv); + + /* Take the buffer from the RX descriptor of the first free + * segment, put it into the uIP 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, remebering where we should re-start scanning + * and resetting the segment scanning logic + */ + + priv->rxhead = (struct eth_rxdesc_s*)rxdesc->rdes3; + stm32_freesegment(priv, rxcurr, priv->segments); + + nllvdbg("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. + */ + + nlldbg("DROPPED: RX descriptor errors: %08x\n", rxdesc->rdes0); + stm32_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; + + nllvdbg("rxhead: %p rxcurr: %p segments: %d\n", + priv->rxhead, priv->rxcurr, priv->segments); + + return -EAGAIN; +} + +/**************************************************************************** + * Function: stm32_receive + * + * Description: + * An interrupt was received indicating the availability of a new RX packet + * + * Parameters: + * priv - Reference to the driver state structure + * + * Returned Value: + * None + * + * Assumptions: + * Global interrupts are disabled by interrupt handling logic. + * + ****************************************************************************/ + +static void stm32_receive(FAR struct stm32_ethmac_s *priv) +{ + struct uip_driver_s *dev = &priv->dev; + + /* Loop while while stm32_recvframe() successfully retrieves valid + * Ethernet frames. + */ + + while (stm32_recvframe(priv) == OK) + { + /* Check if the packet is a valid size for the uIP buffer configuration + * (this should not happen) + */ + + if (dev->d_len > CONFIG_NET_BUFSIZE) + { + nlldbg("DROPPED: Too big: %d\n", dev->d_len); + } + + /* We only accept IP packets of the configured type and ARP packets */ + +#ifdef CONFIG_NET_IPv6 + else if (BUF->type == HTONS(UIP_ETHTYPE_IP6)) +#else + else if (BUF->type == HTONS(UIP_ETHTYPE_IP)) +#endif + { + nllvdbg("IP frame\n"); + + /* Handle ARP on input then give the IP packet to uIP */ + + uip_arp_ipin(&priv->dev); + uip_input(&priv->dev); + + /* If the above function invocation resulted in data that should be + * sent out on the network, the field d_len will set to a value > 0. + */ + + if (priv->dev.d_len > 0) + { + uip_arp_out(&priv->dev); + stm32_transmit(priv); + } + } + else if (BUF->type == htons(UIP_ETHTYPE_ARP)) + { + nllvdbg("ARP frame\n"); + + /* Handle ARP packet */ + + uip_arp_arpin(&priv->dev); + + /* If the above function invocation resulted in data that should be + * sent out on the network, the field d_len will set to a value > 0. + */ + + if (priv->dev.d_len > 0) + { + stm32_transmit(priv); + } + } + else + { + nlldbg("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 */ + + stm32_freebuffer(priv, dev->d_buf); + dev->d_buf = NULL; + } + } +} + +/**************************************************************************** + * Function: stm32_freeframe + * + * Description: + * Scans the TX descriptors and frees the buffers of completed TX transfers. + * + * Parameters: + * priv - Reference to the driver state structure + * + * Returned Value: + * None. + * + * Assumptions: + * Global interrupts are disabled by interrupt handling logic. + * + ****************************************************************************/ + +static void stm32_freeframe(FAR struct stm32_ethmac_s *priv) +{ + struct eth_txdesc_s *txdesc; + int i; + + nllvdbg("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. + */ + + nllvdbg("txtail: %p tdes0: %08x tdes2: %08x tdes3: %08x\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 */ + + stm32_freebuffer(priv, (uint8_t*)txdesc->tdes2); + } + + /* In any event, make sure that TDES2 is nullified. */ + + txdesc->tdes2 = 0; + + /* Check if this is the last segement of a TX frame */ + + if ((txdesc->tdes0 & ETH_TDES0_FS) != 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. + */ + + stm32_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; + + nllvdbg("txhead: %p txtail: %p inflight: %d\n", + priv->txhead, priv->txtail, priv->inflight); + } +} + +/**************************************************************************** + * Function: stm32_txdone + * + * Description: + * An interrupt was received indicating that the last TX packet(s) is done + * + * Parameters: + * priv - Reference to the driver state structure + * + * Returned Value: + * None + * + * Assumptions: + * Global interrupts are disabled by the watchdog logic. + * + ****************************************************************************/ + +static void stm32_txdone(FAR struct stm32_ethmac_s *priv) +{ + DEBUGASSERT(priv->txtail != NULL); + + /* Scan the TX desciptor change, returning buffers to free list */ + + stm32_freeframe(priv); + + /* If no further xmits are pending, then cancel the TX timeout */ + + if (priv->inflight <= 0) + { + wd_cancel(priv->txtimeout); + + /* And disable further TX interrupts. */ + + stm32_disableint(priv, ETH_DMAINT_TI); + } + + /* Then poll uIP for new XMIT data */ + + stm32_dopoll(priv); +} + +/**************************************************************************** + * Function: stm32_interrupt + * + * Description: + * Hardware interrupt handler + * + * 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 stm32_interrupt(int irq, FAR void *context) +{ + register FAR struct stm32_ethmac_s *priv = &g_stm32ethmac[0]; + uint32_t dmasr; + + /* Get the DMA interrupt status bits (no MAC interrupts are expected) */ + + dmasr = stm32_getreg(STM32_ETH_DMASR); + + /* Mask only enabled interrupts. This depends on the fact that the interrupt + * related bits (0-16) correspond in these two registers. + */ + + dmasr &= stm32_getreg(STM32_ETH_DMAIER); + + /* Check if there are pending "normal" interrupts */ + + if ((dmasr & ETH_DMAINT_NIS) != 0) + { + /* Yes.. Check if we received an incoming packet, if so, call + * stm32_receive() + */ + + if ((dmasr & ETH_DMAINT_RI) != 0) + { + /* Clear the pending receive interrupt */ + + stm32_putreg(ETH_DMAINT_RI, STM32_ETH_DMASR); + + /* Handle the received package */ + + stm32_receive(priv); + } + + /* Check if a packet transmission just completed. If so, call + * stm32_txdone(). This may disable further TX interrupts if there + * are no pending tansmissions. + */ + + if ((dmasr & ETH_DMAINT_TI) != 0) + { + /* Clear the pending receive interrupt */ + + stm32_putreg(ETH_DMAINT_TI, STM32_ETH_DMASR); + + /* Check if there are pending transmissions */ + + stm32_txdone(priv); + } + + /* Clear the pending normal summary interrupt */ + + stm32_putreg(ETH_DMAINT_NIS, STM32_ETH_DMASR); + } + + /* Handle error interrupt only if CONFIG_DEBUG_NET is eanbled */ + +#ifdef CONFIG_DEBUG_NET + + /* Check if there are pending "anormal" interrupts */ + + if ((dmasr & ETH_DMAINT_AIS) != 0) + { + /* Just let the user know what happened */ + + nlldbg("Abormal event(s): %08x\n", dmasr); + + /* Clear all pending abnormal events */ + + stm32_putreg(ETH_DMAINT_ABNORMAL, STM32_ETH_DMASR); + + /* Clear the pending abnormal summary interrupt */ + + stm32_putreg(ETH_DMAINT_AIS, STM32_ETH_DMASR); + } +#endif + return OK; +} + +/**************************************************************************** + * Function: stm32_txtimeout + * + * Description: + * Our TX watchdog timed out. Called from the timer interrupt handler. + * The last TX never completed. Reset the hardware and start again. + * + * Parameters: + * argc - The number of available arguments + * arg - The first argument + * + * Returned Value: + * None + * + * Assumptions: + * Global interrupts are disabled by the watchdog logic. + * + ****************************************************************************/ + +static void stm32_txtimeout(int argc, uint32_t arg, ...) +{ + FAR struct stm32_ethmac_s *priv = (FAR struct stm32_ethmac_s *)arg; + + nlldbg("Timeout!\n"); + + /* Then reset the hardware. Just take the interface down, then back + * up again. + */ + + stm32_ifdown(&priv->dev); + stm32_ifup(&priv->dev); + + /* Then poll uIP for new XMIT data */ + + stm32_dopoll(priv); +} + +/**************************************************************************** + * Function: stm32_polltimer + * + * Description: + * Periodic timer handler. Called from the timer interrupt handler. + * + * Parameters: + * argc - The number of available arguments + * arg - The first argument + * + * Returned Value: + * None + * + * Assumptions: + * Global interrupts are disabled by the watchdog logic. + * + ****************************************************************************/ + +static void stm32_polltimer(int argc, uint32_t arg, ...) +{ + FAR struct stm32_ethmac_s *priv = (FAR struct stm32_ethmac_s *)arg; + FAR struct uip_driver_s *dev = &priv->dev; + + /* Check if the next TX descriptor is owned by the Ethernet DMA or CPU. We + * cannot perform the timer poll if we are unable to accept another packet + * for transmission. Hmmm.. might be bug here. Does this mean if there is + * a transmit in progress, we will missing TCP time state updates? + * + * In a race condition, ETH_TDES0_OWN may be cleared BUT still not available + * because stm32_freeframe() has not yet run. If stm32_freeframe() has run, + * the buffer1 pointer (tdes2) will be nullified (and inflight should be < + * CONFIG_STM32_ETH_NTXDESC). + */ + + if ((priv->txhead->tdes0 & ETH_TDES0_OWN) == 0 && + priv->txhead->tdes2 == 0) + { + /* If we have the descriptor, then perform the timer poll. Allocate a + * buffer for the poll. + */ + + DEBUGASSERT(dev->d_len == 0 && dev->d_buf == NULL); + dev->d_buf = stm32_allocbuffer(priv); + + /* We can't poll if we have no buffers */ + + if (dev->d_buf) + { + /* Update TCP timing states and poll uIP for new XMIT data. + */ + + (void)uip_timer(dev, stm32_uiptxpoll, STM32_POLLHSEC); + + /* 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); + stm32_freebuffer(priv, dev->d_buf); + dev->d_buf = NULL; + } + } + } + + /* Setup the watchdog poll timer again */ + + (void)wd_start(priv->txpoll, STM32_WDDELAY, stm32_polltimer, 1, arg); +} + +/**************************************************************************** + * Function: stm32_ifup + * + * Description: + * NuttX Callback: Bring up the Ethernet interface when an IP address is + * provided + * + * Parameters: + * dev - Reference to the NuttX driver state structure + * + * Returned Value: + * None + * + * Assumptions: + * + ****************************************************************************/ + +static int stm32_ifup(struct uip_driver_s *dev) +{ + FAR struct stm32_ethmac_s *priv = (FAR struct stm32_ethmac_s *)dev->d_private; + int ret; + + ndbg("Bringing up: %d.%d.%d.%d\n", + dev->d_ipaddr & 0xff, (dev->d_ipaddr >> 8) & 0xff, + (dev->d_ipaddr >> 16) & 0xff, dev->d_ipaddr >> 24 ); + + /* Configure the Ethernet interface for DMA operation. */ + + ret = stm32_ethconfig(priv); + if (ret < 0) + { + return ret; + } + + /* Set and activate a timer process */ + + (void)wd_start(priv->txpoll, STM32_WDDELAY, stm32_polltimer, 1, (uint32_t)priv); + + /* Enable the Ethernet interrupt */ + + priv->ifup = true; + up_enable_irq(STM32_IRQ_ETH); + + stm32_checksetup(); + return OK; +} + +/**************************************************************************** + * Function: stm32_ifdown + * + * Description: + * NuttX Callback: Stop the interface. + * + * Parameters: + * dev - Reference to the NuttX driver state structure + * + * Returned Value: + * None + * + * Assumptions: + * + ****************************************************************************/ + +static int stm32_ifdown(struct uip_driver_s *dev) +{ + FAR struct stm32_ethmac_s *priv = (FAR struct stm32_ethmac_s *)dev->d_private; + irqstate_t flags; + + ndbg("Taking the network down\n"); + + /* Disable the Ethernet interrupt */ + + flags = irqsave(); + up_disable_irq(STM32_IRQ_ETH); + + /* Cancel the TX poll timer and TX timeout timers */ + + wd_cancel(priv->txpoll); + wd_cancel(priv->txtimeout); + + /* Put the EMAC in its reset, non-operational state. This should be + * a known configuration that will guarantee the stm32_ifup() always + * successfully brings the interface back up. + */ + + stm32_ethreset(priv); + + /* Mark the device "down" */ + + priv->ifup = false; + irqrestore(flags); + return OK; +} + +/**************************************************************************** + * Function: stm32_txavail + * + * Description: + * Driver callback invoked when new TX data is available. This is a + * stimulus perform an out-of-cycle poll and, thereby, reduce the TX + * latency. + * + * Parameters: + * dev - Reference to the NuttX driver state structure + * + * Returned Value: + * None + * + * Assumptions: + * Called in normal user mode + * + ****************************************************************************/ + +static int stm32_txavail(struct uip_driver_s *dev) +{ + FAR struct stm32_ethmac_s *priv = (FAR struct stm32_ethmac_s *)dev->d_private; + irqstate_t flags; + + nllvdbg("ifup: %d\n", priv->ifup); + + /* Disable interrupts because this function may be called from interrupt + * level processing. + */ + + flags = irqsave(); + + /* Ignore the notification if the interface is not yet up */ + + if (priv->ifup) + { + /* Poll uIP for new XMIT data */ + + stm32_dopoll(priv); + } + + irqrestore(flags); + return OK; +} + +/**************************************************************************** + * Function: stm32_addmac + * + * Description: + * NuttX Callback: Add the specified MAC address to the hardware multicast + * address filtering + * + * Parameters: + * dev - Reference to the NuttX driver state structure + * mac - The MAC address to be added + * + * Returned Value: + * None + * + * Assumptions: + * + ****************************************************************************/ + +#ifdef CONFIG_NET_IGMP +static int stm32_addmac(struct uip_driver_s *dev, FAR const uint8_t *mac) +{ + FAR struct stm32_ethmac_s *priv = (FAR struct stm32_ethmac_s *)dev->d_private; + + nllvdbg("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 routing table */ + /* Add the MAC address to the hardware multicast routing table */ +#error "Missing logic" + + return OK; +} +#endif + +/**************************************************************************** + * Function: stm32_rmmac + * + * Description: + * NuttX Callback: Remove the specified MAC address from the hardware multicast + * address filtering + * + * Parameters: + * dev - Reference to the NuttX driver state structure + * mac - The MAC address to be removed + * + * Returned Value: + * None + * + * Assumptions: + * + ****************************************************************************/ + +#ifdef CONFIG_NET_IGMP +static int stm32_rmmac(struct uip_driver_s *dev, FAR const uint8_t *mac) +{ + FAR struct stm32_ethmac_s *priv = (FAR struct stm32_ethmac_s *)dev->d_private; + + nllvdbg("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 routing table */ +#error "Missing logic" + + return OK; +} +#endif + +/**************************************************************************** + * Function: stm32_txdescinit + * + * Description: + * Initializes the DMA TX descriptors in chain mode. + * + * Parameters: + * priv - Reference to the driver state structure + * + * Returned Value: + * None + * + * Assumptions: + * + ****************************************************************************/ + +static void stm32_txdescinit(FAR struct stm32_ethmac_s *priv) +{ + struct eth_txdesc_s *txdesc; + int i; + + /* priv->txhead will 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_STM32_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_STM32_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 Desciptor List Address Register */ + + stm32_putreg((uint32_t)priv->txtable, STM32_ETH_DMATDLAR); +} + +/**************************************************************************** + * Function: stm32_rxdescinit + * + * Description: + * Initializes the DMA RX descriptors in chain mode. + * + * Parameters: + * priv - Reference to the driver state structure + * + * Returned Value: + * None + * + * Assumptions: + * + ****************************************************************************/ + +static void stm32_rxdescinit(FAR struct stm32_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_STM32_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_STM32_ETH_BUFSIZE; + + /* Set Buffer1 address pointer */ + + rxdesc->rdes2 = (uint32_t)&priv->rxbuffer[i*CONFIG_STM32_ETH_BUFSIZE]; + + /* Initialize the next descriptor with the Next Descriptor Polling Enable */ + + if( i < (CONFIG_STM32_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 */ + + stm32_putreg((uint32_t)priv->rxtable, STM32_ETH_DMARDLAR); +} + +/**************************************************************************** + * Function: stm32_phyread + * + * Description: + * Read a PHY register. + * + * 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 stm32_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 = stm32_getreg(STM32_ETH_MACMIIAR); + regval &= ETH_MACMIIAR_CR_MASK; + + /* Set the PHY device address, PHY register address, and set the buy bit. + * the ETH_MACMIIAR_MW is clear, indicating a read operation. + */ + + regval |= (((uint32_t)phydevaddr << ETH_MACMIIAR_PA_SHIFT) & ETH_MACMIIAR_PA_MASK); + regval |= (((uint32_t)phyregaddr << ETH_MACMIIAR_MR_SHIFT) & ETH_MACMIIAR_MR_MASK); + regval |= ETH_MACMIIAR_MB; + + stm32_putreg(regval, STM32_ETH_MACMIIAR); + + /* Wait for the transfer to complete */ + + for (timeout = 0; timeout < PHY_READ_TIMEOUT; timeout++) + { + if ((stm32_getreg(STM32_ETH_MACMIIAR) & ETH_MACMIIAR_MB) == 0) + { + *value = (uint16_t)stm32_getreg(STM32_ETH_MACMIIDR); + return OK; + } + } + + ndbg("MII transfer timed out: phydevaddr: %04x phyregaddr: %04x\n", + phydevaddr, phyregaddr); + + return -ETIMEDOUT; +} + +/**************************************************************************** + * Function: stm32_phywrite + * + * Description: + * Write to a PHY register. + * + * 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 stm32_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 = stm32_getreg(STM32_ETH_MACMIIAR); + regval &= ETH_MACMIIAR_CR_MASK; + + /* Set the PHY device address, PHY register address, and set the busy bit. + * the ETH_MACMIIAR_MW is set, indicating a write operation. + */ + + regval |= (((uint32_t)phydevaddr << ETH_MACMIIAR_PA_SHIFT) & ETH_MACMIIAR_PA_MASK); + regval |= (((uint32_t)phyregaddr << ETH_MACMIIAR_MR_SHIFT) & ETH_MACMIIAR_MR_MASK); + regval |= (ETH_MACMIIAR_MB | ETH_MACMIIAR_MW); + + /* Write the value into the MACIIDR register before setting the new MACMIIAR + * register value. + */ + + stm32_putreg(value, STM32_ETH_MACMIIDR); + stm32_putreg(regval, STM32_ETH_MACMIIAR); + + /* Wait for the transfer to complete */ + + for (timeout = 0; timeout < PHY_WRITE_TIMEOUT; timeout++) + { + if ((stm32_getreg(STM32_ETH_MACMIIAR) & ETH_MACMIIAR_MB) == 0) + { + return OK; + } + } + + ndbg("MII transfer timed out: phydevaddr: %04x phyregaddr: %04x value: %04x\n", + phydevaddr, phyregaddr, value); + + return -ETIMEDOUT; +} + +/**************************************************************************** + * Function: stm32_phyinit + * + * Description: + * Configure the PHY and determine the link speed/duplex. + * + * Parameters: + * priv - A reference to the private driver state structure + * + * Returned Value: + * OK on success; Negated errno on failure. + * + * Assumptions: + * + ****************************************************************************/ + +static int stm32_phyinit(FAR struct stm32_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 = stm32_getreg(STM32_ETH_MACMIIAR); + regval &= ~ETH_MACMIIAR_CR_MASK; + regval |= ETH_MACMIIAR_CR; + stm32_putreg(regval, STM32_ETH_MACMIIAR); + + /* Put the PHY in reset mode */ + + ret = stm32_phywrite(CONFIG_STM32_PHYADDR, MII_MCR, MII_MCR_RESET); + if (ret < 0) + { + ndbg("Failed to reset the PHY: %d\n", ret); + return ret; + } + up_mdelay(PHY_RESET_DELAY); + + /* Perform auto-negotion if so configured */ + +#ifdef CONFIG_STM32_AUTONEG + /* Wait for link status */ + + for (timeout = 0; timeout < PHY_RETRY_TIMEOUT; timeout++) + { + ret = stm32_phyread(CONFIG_STM32_PHYADDR, MII_MSR, &phyval); + if (ret < 0) + { + ndbg("Failed to read the PHY MSR: %d\n", ret); + return ret; + } + else if ((phyval & MII_MSR_LINKSTATUS) != 0) + { + break; + } + } + + if (timeout >= PHY_RETRY_TIMEOUT) + { + ndbg("Timed out waiting for link status\n"); + return -ETIMEDOUT; + } + + /* Enable auto-gegotiation */ + + ret = stm32_phywrite(CONFIG_STM32_PHYADDR, MII_MCR, MII_MCR_ANENABLE); + if (ret < 0) + { + ndbg("Failed to enable auto-negotiation: %d\n", ret); + return ret; + } + + /* Wait until auto-negotiation completes */ + + for (timeout = 0; timeout < PHY_RETRY_TIMEOUT; timeout++) + { + ret = stm32_phyread(CONFIG_STM32_PHYADDR, MII_MSR, &phyval); + if (ret < 0) + { + ndbg("Failed to read the PHY MSR: %d\n", ret); + return ret; + } + else if ((phyval & MII_MSR_ANEGCOMPLETE) != 0) + { + break; + } + } + + if (timeout >= PHY_RETRY_TIMEOUT) + { + ndbg("Timed out waiting for auto-negotiation\n"); + return -ETIMEDOUT; + } + + /* Read the result of the auto-negotiation from the PHY-specific register */ + + ret = stm32_phyread(CONFIG_STM32_PHYADDR, CONFIG_STM32_PHYSR, &phyval); + if (ret < 0) + { + ndbg("Failed to read PHY status register\n"); + return ret; + } + + /* Remember the selected speed and duplex modes */ + + if ((phyval & CONFIG_STM32_PHYSR_MODE) == CONFIG_STM32_PHYSR_FULLDUPLEX) + { + priv->fduplex = 1; + } + + if ((phyval & CONFIG_STM32_PHYSR_SPEED) == CONFIG_STM32_PHYSR_100MBPS) + { + priv->mbps100 = 1; + } + +#else /* Auto-negotion not selected */ + + phyval = 0; +#ifdef CONFIG_STM32_ETHFD + phyval |= MII_MCR_FULLDPLX; +#endif +#ifdef CONFIG_STM32_ETH100MBPS + phyval |= MII_MCR_SPEED100; +#endif + + ret = stm32_phywrite(CONFIG_STM32_PHYADDR, MII_MCR, phyval); + if (ret < 0) + { + ndbg("Failed to write the PHY MCR: %d\n", ret); + return ret; + } + up_mdelay(PHY_CONFIG_DELAY); + + /* Remember the selected speed and duplex modes */ + +#ifdef CONFIG_STM32_ETHFD + priv->fduplex = 1; +#endif +#ifdef CONFIG_STM32_ETH100MBPS + priv->mbps100 = 1; +#endif +#endif + + ndbg("Duplex: %s Speed: %d MBps\n", + priv->fduplex ? "FULL" : "HALF", + priv->mbps100 ? 100 : 10); + + return OK; +} + +/**************************************************************************** + * Function: stm32_ethgpioconfig + * + * Description: + * Configure GPIOs for the Ethernet interface. + * + * Parameters: + * priv - A reference to the private driver state structure + * + * Returned Value: + * None. + * + * Assumptions: + * + ****************************************************************************/ + +static inline void stm32_ethgpioconfig(FAR struct stm32_ethmac_s *priv) +{ + /* Configure GPIO pins to support Ethernet */ + +#if defined(CONFIG_STM32_MII) || defined(CONFIG_STM32_RMII) + + /* MDC and MDIO are common to both modes */ + + stm32_configgpio(GPIO_ETH_MDC); + stm32_configgpio(GPIO_ETH_MDIO); + + /* Set up the MII interface */ + +#if defined(CONFIG_STM32_MII) + + /* Select the MII interface */ + + stm32_selectmii(); + + /* Provide clocking via MCO1 or MCO2: + * + * "MCO1 (microcontroller clock output), used to output HSI, LSE, HSE or PLL + * clock (through a configurable prescaler) on PA8 pin." + * + * "MCO2 (microcontroller clock output), used to output HSE, PLL, SYSCLK or + * PLLI2S clock (through a configurable prescaler) on PC9 pin." + */ + +# if defined(CONFIG_STM32_MII_MCO1) + /* Configure MC01 to drive the PHY. Board logic must provide MC01 clocking + * info. + */ + + stm32_configgpio(GPIO_MCO1); + stm32_mco1config(BOARD_CFGR_MC01_SOURCE, BOARD_CFGR_MC01_DIVIDER); + +# elif defined(CONFIG_STM32_MII_MCO2) + /* Configure MC02 to drive the PHY. Board logic must provide MC02 clocking + * info. + */ + + stm32_configgpio(GPIO_MCO2); + stm32_mco2config(BOARD_CFGR_MC02_SOURCE, BOARD_CFGR_MC02_DIVIDER); +# endif + + /* 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 + */ + + stm32_configgpio(GPIO_ETH_MII_COL); + stm32_configgpio(GPIO_ETH_MII_CRS); + stm32_configgpio(GPIO_ETH_MII_RXD0); + stm32_configgpio(GPIO_ETH_MII_RXD1); + stm32_configgpio(GPIO_ETH_MII_RXD2); + stm32_configgpio(GPIO_ETH_MII_RXD3); + stm32_configgpio(GPIO_ETH_MII_RX_CLK); + stm32_configgpio(GPIO_ETH_MII_RX_DV); + stm32_configgpio(GPIO_ETH_MII_RX_ER); + stm32_configgpio(GPIO_ETH_MII_TXD0); + stm32_configgpio(GPIO_ETH_MII_TXD1); + stm32_configgpio(GPIO_ETH_MII_TXD2); + stm32_configgpio(GPIO_ETH_MII_TXD3); + stm32_configgpio(GPIO_ETH_MII_TX_CLK); + stm32_configgpio(GPIO_ETH_MII_TX_EN); + + /* Set up the RMII interface. */ + +#elif defined(CONFIG_STM32_RMII) + + /* Select the RMII interface */ + + stm32_selectrmii(); + + /* RMII interface pins (7): + * + * RMII_TXD[1:0], RMII_TX_EN, RMII_RXD[1:0], RMII_CRS_DV, MDC, MDIO, + * RMII_REF_CLK + */ + + stm32_configgpio(GPIO_ETH_RMII_CRS_DV); + stm32_configgpio(GPIO_ETH_RMII_REF_CLK); + stm32_configgpio(GPIO_ETH_RMII_RXD0); + stm32_configgpio(GPIO_ETH_RMII_RXD1); + stm32_configgpio(GPIO_ETH_RMII_TXD0); + stm32_configgpio(GPIO_ETH_RMII_TXD1); + stm32_configgpio(GPIO_ETH_RMII_TX_CLK); + stm32_configgpio(GPIO_ETH_RMII_TX_EN); + +#endif +#endif + + /* Enable pulse-per-second (PPS) output signal */ + + stm32_configgpio(GPIO_ETH_PPS_OUT); +} + +/**************************************************************************** + * Function: stm32_ethreset + * + * Description: + * Reset the Ethernet block. + * + * Parameters: + * priv - A reference to the private driver state structure + * + * Returned Value: + * None. + * + * Assumptions: + * + ****************************************************************************/ + +static void stm32_ethreset(FAR struct stm32_ethmac_s *priv) +{ + uint32_t regval; + + /* Reset the Ethernet on the AHB1 bus */ + + regval = stm32_getreg(STM32_RCC_AHB1RSTR); + regval |= RCC_AHB1RSTR_ETHMACRST; + stm32_putreg(regval, STM32_RCC_AHB1RSTR); + + regval &= ~RCC_AHB1RSTR_ETHMACRST; + stm32_putreg(regval, STM32_RCC_AHB1RSTR); + + /* 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. + */ + + regval = stm32_getreg(STM32_ETH_DMABMR); + regval |= ETH_DMABMR_SR; + stm32_putreg(regval, STM32_ETH_DMABMR); + + /* Wait for software reset to complete. The SR bit is cleared automatically + * after the reset operation has completed in all of the core clock domains. + */ + + while ((stm32_getreg(STM32_ETH_DMABMR) & ETH_DMABMR_SR) != 0); +} + +/**************************************************************************** + * Function: stm32_macconfig + * + * Description: + * Configure the Ethernet MAC for DMA operation. + * + * Parameters: + * priv - A reference to the private driver state structure + * + * Returned Value: + * OK on success; Negated errno on failure. + * + * Assumptions: + * + ****************************************************************************/ + +static int stm32_macconfig(FAR struct stm32_ethmac_s *priv) +{ + uint32_t regval; + + /* Set up the MACCR register */ + + regval = stm32_getreg(STM32_ETH_MACCR); + regval &= ~MACCR_CLEAR_BITS; + regval |= MACCR_SET_BITS; + + if (priv->fduplex) + { + /* Set the DM bit for full duplex support */ + + regval |= ETH_MACCR_DM; + } + + if (priv->mbps100) + { + /* Set the FES bit for 100Mbps fast ethernet support */ + + regval |= ETH_MACCR_FES; + } + + stm32_putreg(regval, STM32_ETH_MACCR); + + /* Set up the MACFFR register */ + + regval = stm32_getreg(STM32_ETH_MACFFR); + regval &= ~MACFFR_CLEAR_BITS; + regval |= MACFFR_SET_BITS; + stm32_putreg(regval, STM32_ETH_MACFFR); + + /* Set up the MACHTHR and MACHTLR registers */ + + stm32_putreg(0, STM32_ETH_MACHTHR); + stm32_putreg(0, STM32_ETH_MACHTLR); + + /* Setup up the MACFCR register */ + + regval = stm32_getreg(STM32_ETH_MACFCR); + regval &= ~MACFCR_CLEAR_MASK; + regval |= MACFCR_SET_MASK; + stm32_putreg(regval, STM32_ETH_MACFCR); + + /* Setup up the MACVLANTR register */ + + stm32_putreg(0, STM32_ETH_MACVLANTR); + + /* DMA Configuration */ + /* Set up the DMAOMR register */ + + regval = stm32_getreg(STM32_ETH_DMAOMR); + regval &= ~DMAOMR_CLEAR_MASK; + regval |= DMAOMR_SET_MASK; + stm32_putreg(regval, STM32_ETH_DMAOMR); + + /* Set up the DMABMR register */ + + regval = stm32_getreg(STM32_ETH_DMABMR); + regval &= ~DMABMR_CLEAR_MASK; + regval |= DMABMR_SET_MASK; + stm32_putreg(regval, STM32_ETH_DMABMR); + + return OK; +} + +/**************************************************************************** + * Function: stm32_macaddress + * + * Description: + * Configure the selected MAC address. + * + * Parameters: + * priv - A reference to the private driver state structure + * + * Returned Value: + * OK on success; Negated errno on failure. + * + * Assumptions: + * + ****************************************************************************/ + +static void stm32_macaddress(FAR struct stm32_ethmac_s *priv) +{ + FAR struct uip_driver_s *dev = &priv->dev; + uint32_t regval; + + nllvdbg("%s MAC: %02x:%02x:%02x:%02x:%02x:%02x\n", + dev->d_ifname, + dev->d_mac.ether_addr_octet[0], dev->d_mac.ether_addr_octet[1], + dev->d_mac.ether_addr_octet[2], dev->d_mac.ether_addr_octet[3], + dev->d_mac.ether_addr_octet[4], dev->d_mac.ether_addr_octet[5]); + + /* Set the MAC address high register */ + + regval = ((uint32_t)dev->d_mac.ether_addr_octet[5] << 8) | + (uint32_t)dev->d_mac.ether_addr_octet[4]; + stm32_putreg(regval, STM32_ETH_MACA0HR); + + /* Set the MAC address low register */ + + regval = ((uint32_t)dev->d_mac.ether_addr_octet[3] << 24) | + ((uint32_t)dev->d_mac.ether_addr_octet[2] << 16) | + ((uint32_t)dev->d_mac.ether_addr_octet[1] << 8) | + (uint32_t)dev->d_mac.ether_addr_octet[0]; + stm32_putreg(regval, STM32_ETH_MACA0LR); +} + +/**************************************************************************** + * Function: stm32_macenable + * + * Description: + * Enable normal MAC operation. + * + * Parameters: + * priv - A reference to the private driver state structure + * + * Returned Value: + * OK on success; Negated errno on failure. + * + * Assumptions: + * + ****************************************************************************/ + +static int stm32_macenable(FAR struct stm32_ethmac_s *priv) +{ + uint32_t regval; + + /* Set the MAC address */ + + stm32_macaddress(priv); + + /* Enable transmit state machine of the MAC for transmission on the MII */ + + regval = stm32_getreg(STM32_ETH_MACCR); + regval |= ETH_MACCR_TE; + stm32_putreg(regval, STM32_ETH_MACCR); + + /* Flush Transmit FIFO */ + + regval = stm32_getreg(STM32_ETH_DMAOMR); + regval |= ETH_DMAOMR_FTF; + stm32_putreg(regval, STM32_ETH_DMAOMR); + + /* Enable receive state machine of the MAC for reception from the MII */ + + /* Enables or disables the MAC reception. */ + + regval = stm32_getreg(STM32_ETH_MACCR); + regval |= ETH_MACCR_RE; + stm32_putreg(regval, STM32_ETH_MACCR); + + /* Start DMA transmission */ + + regval = stm32_getreg(STM32_ETH_DMAOMR); + regval |= ETH_DMAOMR_ST; + stm32_putreg(regval, STM32_ETH_DMAOMR); + + /* Start DMA reception */ + + regval = stm32_getreg(STM32_ETH_DMAOMR); + regval |= ETH_DMAOMR_SR; + stm32_putreg(regval, STM32_ETH_DMAOMR); + + /* Enable Ethernet DMA interrupts. + * + * The STM32 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. + */ + + stm32_putreg(ETH_MACIMR_ALLINTS, STM32_ETH_MACIMR); + + /* 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. + */ + + stm32_putreg((ETH_DMAINT_RECV_ENABLE | ETH_DMAINT_ERROR_ENABLE), STM32_ETH_DMAIER); + return OK; +} + +/**************************************************************************** + * Function: stm32_ethconfig + * + * Description: + * Configure the Ethernet interface for DMA operation. + * + * Parameters: + * priv - A reference to the private driver state structure + * + * Returned Value: + * OK on success; Negated errno on failure. + * + * Assumptions: + * + ****************************************************************************/ + +static int stm32_ethconfig(FAR struct stm32_ethmac_s *priv) +{ + int ret; + + /* NOTE: The Ethernet clocks were initialized early in the boot-up + * sequence in stm32_rcc.c. + */ + + /* Reset the Ethernet block */ + + nllvdbg("Reset the Ethernet block\n"); + stm32_ethreset(priv); + + /* Initialize the PHY */ + + nllvdbg("Initialize the PHY\n"); + ret = stm32_phyinit(priv); + if (ret < 0) + { + return ret; + } + + /* Initialize the MAC and DMA */ + + nllvdbg("Initialize the MAC and DMA\n"); + ret = stm32_macconfig(priv); + if (ret < 0) + { + return ret; + } + + /* Initialize the free buffer list */ + + stm32_initbuffer(priv); + + /* Initialize TX Descriptors list: Chain Mode */ + + stm32_txdescinit(priv); + + /* Initialize RX Descriptors list: Chain Mode */ + + stm32_rxdescinit(priv); + + /* Enable normal MAC operation */ + + nllvdbg("Enable normal operation\n"); + return stm32_macenable(priv); +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Function: stm32_ethinitialize + * + * Description: + * Initialize the Ethernet driver for one interface. If the STM32 chip + * supports multiple Ethernet controllers, then board specific logic + * must implement up_netinitialize() and call this function to initialize + * the desired interfaces. + * + * Parameters: + * intf - In the case where there are multiple EMACs, this value + * identifies which EMAC is to be initialized. + * + * Returned Value: + * OK on success; Negated errno on failure. + * + * Assumptions: + * + ****************************************************************************/ + +#if STM32_NETHERNET == 1 +static inline +#endif + +int stm32_ethinitialize(int intf) +{ + struct stm32_ethmac_s *priv; + + nvdbg("intf: %d\n", intf); + + /* Get the interface structure associated with this interface number. */ + + DEBUGASSERT(intf < STM32_NETHERNET); + priv = &g_stm32ethmac[intf]; + + /* Initialize the driver structure */ + + memset(priv, 0, sizeof(struct stm32_ethmac_s)); + priv->dev.d_ifup = stm32_ifup; /* I/F up (new IP address) callback */ + priv->dev.d_ifdown = stm32_ifdown; /* I/F down callback */ + priv->dev.d_txavail = stm32_txavail; /* New TX data callback */ +#ifdef CONFIG_NET_IGMP + priv->dev.d_addmac = stm32_addmac; /* Add multicast MAC address */ + priv->dev.d_rmmac = stm32_rmmac; /* Remove multicast MAC address */ +#endif + priv->dev.d_private = (void*)g_stm32ethmac; /* Used to recover private state from dev */ + + /* Create a watchdog for timing polling for and timing of transmisstions */ + + priv->txpoll = wd_create(); /* Create periodic poll timer */ + priv->txtimeout = wd_create(); /* Create TX timeout timer */ + + /* Configure GPIO pins to support Ethernet */ + + stm32_ethgpioconfig(priv); + + /* Attach the IRQ to the driver */ + + if (irq_attach(STM32_IRQ_ETH, stm32_interrupt)) + { + /* We could not attach the ISR to the interrupt */ + + return -EAGAIN; + } + + /* Put the interface in the down state. */ + + stm32_ifdown(&priv->dev); + + /* Register the device with the OS so that socket IOCTLs can be performed */ + + (void)netdev_register(&priv->dev); + return OK; +} + +/**************************************************************************** + * Function: up_netinitialize + * + * Description: + * This is the "standard" network initialization logic called from the + * low-level initialization logic in up_initialize.c. If STM32_NETHERNET + * greater than one, then board specific logic will have to supply a + * version of up_netinitialize() that calls stm32_ethinitialize() with + * the appropriate interface number. + * + * Parameters: + * None. + * + * Returned Value: + * None. + * + * Assumptions: + * + ****************************************************************************/ + +#if STM32_NETHERNET == 1 +void up_netinitialize(void) +{ + (void)stm32_ethinitialize(0); +} +#endif + +#endif /* STM32_NETHERNET > 0 */ +#endif /* CONFIG_NET && CONFIG_STM32_ETHMAC */ |