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nuttx/drivers/net/lan9250.c

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/****************************************************************************
* drivers/net/lan9250.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>
#include <stdint.h>
#include <stdbool.h>
#include <stdint.h>
#include <time.h>
#include <string.h>
#include <assert.h>
#include <debug.h>
#include <errno.h>
#include <arpa/inet.h>
#include <nuttx/irq.h>
#include <nuttx/arch.h>
#include <nuttx/wdog.h>
#include <nuttx/wqueue.h>
#include <nuttx/clock.h>
#include <nuttx/net/net.h>
#include <nuttx/net/ip.h>
#include <nuttx/net/netdev.h>
#include <nuttx/net/lan9250.h>
#ifdef CONFIG_NET_PKT
# include <nuttx/net/pkt.h>
#endif
#ifdef CONFIG_LAN9250_SPI
# include <nuttx/spi/spi.h>
#else
# include <nuttx/spi/qspi.h>
#endif
#include "lan9250.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
/* LAN9250 SPI clock */
#define LAN9250_FREQUENCY CONFIG_LAN9250_FREQUENCY
/* LAN9250 read and write command */
#ifdef CONFIG_LAN9250_SPI
# if LAN9250_FREQUENCY > (30 * 1000 * 1000)
# define LAN9250_SPI_READ LAN9250_SPI_CMD_FREAD
# else
# define LAN9250_SPI_READ LAN9250_SPI_CMD_READ
# endif
# define LAN9250_SPI_WRITE LAN9250_SPI_CMD_WRITE
#else
# define LAN9250_SPI_READ LAN9250_QSPI_CMD_READ
# define LAN9250_SPI_WRITE LAN9250_QSPI_CMD_WRITE
# define LAN9250_SPI_ENABLE_SQI LAN9250_SPI_CMD_ENABLE_SQI
#endif
/**
* LAN9250 interrupt trigger source:
*
* - PHY for checking link up or down
* - TX data FIFO available
* - RX data FIFO reaches programmed level
*/
#define LAN9250_INT_SOURCE (IER_PHY | IER_TDFA | IER_RSFL)
/* 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 LAN9250_WORK LPWORK
/* Timing *******************************************************************/
/* Reset timeout in second */
#define LAN9250_RESET_TIMEOUT (5)
/* TX timeout = 1 minute */
#define LAN9250_TX_TIMEOUT (60 * CLK_TCK)
/* Poll timeout */
#define LAN9250_POLL_TIMEOUT MSEC2TICK(50)
/* Read/Write MAC register timeout in second */
#define LAN9250_MAC_TIMEOUT 2
/* Read/Write PHY register timeout in second */
#define LAN9250_PHY_TIMEOUT 2
/* Read/Write PHY register timeout in millisecond */
#define LAN9250_SQI_TIMEOUT 20
/* Packet Memory ************************************************************/
/* Misc. Helper Macros ******************************************************/
#define LAN9250_ALIGN(v) (((v) + 3) & (~3))
/* Packet buffer size with 4-CRC */
#define LAN9250_PKTBUF_SIZE LAN9250_ALIGN(MAX_NETDEV_PKTSIZE + \
CONFIG_NET_GUARDSIZE + \
4)
/* This is a helper pointer for accessing the contents of Ethernet header */
#define BUF ((struct eth_hdr_s *)priv->dev.d_buf)
/* Debug ********************************************************************/
#ifdef CONFIG_LAN9250_REGDEBUG
# define lan9250_setreg_dump(a, v) \
syslog(LOG_DEBUG, "LAN9250 REG: 0x%04x<-0x%08x\n", a, v)
# define lan9250_getreg_dump(a, v) \
syslog(LOG_DEBUG, "LAN9250 REG: 0x%04x->0x%08x\n", a, v)
# define lan9250_setmacreg_dump(a, v) \
syslog(LOG_DEBUG, "LAN9250 MAC: 0x%02x<-0x%08x\n", a, v)
# define lan9250_getmacreg_dump(a, v) \
syslog(LOG_DEBUG, "LAN9250 MAC: 0x%02x->0x%08x\n", a, v)
# define lan9250_setphyreg_dump(a, v) \
syslog(LOG_DEBUG, "LAN9250 PHY: 0x%02x<-0x%08x\n", a, v)
# define lan9250_getphyreg_dump(a, v) \
syslog(LOG_DEBUG, "LAN9250 PHY: 0x%02x->0x%08x\n", a, v)
# define lan9250_buffer_dump(c, b, s) \
syslog(LOG_DEBUG, "LAN9250 BUF: cmd: %04x buffer: %p length: %d\n", c, b, s)
#else
# define lan9250_setreg_dump(a, v)
# define lan9250_getreg_dump(a, v)
# define lan9250_setmacreg_dump(a, v)
# define lan9250_getmacreg_dump(a, v)
# define lan9250_setphyreg_dump(a, v)
# define lan9250_getphyreg_dump(a, v)
# define lan9250_buffer_dump(c, b, s)
#endif
/* CONFIG_LAN9250_DUMPPACKET will dump the contents of each packet. */
#ifdef CONFIG_LAN9250_DUMPPACKET
# define lan9250_dump_buf(m, a, n) lib_dumpbuffer(m, a, n)
#else
# define lan9250_dump_buf(m, a, n)
#endif
/****************************************************************************
* Private Types
****************************************************************************/
/* The lan9250_driver_s encapsulates all state information for a single
* hardware interface
*/
struct lan9250_driver_s
{
/* Low-level MCU-specific support */
const struct lan9250_lower_s *lower;
/* This is the contained (Q)SPI driver instance */
#ifdef CONFIG_LAN9250_SPI
struct spi_dev_s *spi;
#else
bool sqi_mode;
struct qspi_dev_s *qspi;
#endif
bool tx_available; /* TX is available */
/* Read/Write buffer for SPI transmission */
uint32_t pktbuf[LAN9250_PKTBUF_SIZE / 4];
struct wdog_s txtout_timer; /* TX timeout timer */
struct work_s txtout_work; /* Tx timeout work */
struct work_s txpoll_work; /* TX poll work */
struct work_s irq_work; /* Interrupt work */
/* This holds the information visible to the NuttX network */
struct net_driver_s dev; /* Interface understood by the network */
};
/****************************************************************************
* Private Data
****************************************************************************/
/* Driver status structure */
static struct lan9250_driver_s g_lan9250;
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* Low-level SPI helpers */
static inline void lan9250_config_spi(FAR struct lan9250_driver_s *priv);
static void lan9250_lock_spi(FAR struct lan9250_driver_s *priv);
static inline void lan9250_unlock_spi(FAR struct lan9250_driver_s *priv);
/* SPI control register access */
static uint32_t lan9250_get_reg(FAR struct lan9250_driver_s *priv,
uint16_t address);
static void lan9250_set_reg(FAR struct lan9250_driver_s *priv,
uint16_t address, uint32_t data);
static void lan9250_wait_ready(FAR struct lan9250_driver_s *priv,
uint16_t address, uint32_t mask,
uint32_t expected, uint32_t timeout);
/* MAC register access */
static uint32_t lan9250_get_macreg(FAR struct lan9250_driver_s *priv,
uint8_t address);
static void lan9250_set_macreg(FAR struct lan9250_driver_s *priv,
uint8_t address, uint32_t data);
static void lan9250_wait_mac_ready(FAR struct lan9250_driver_s *priv,
uint8_t address, uint32_t mask,
uint32_t expected, uint32_t timeout);
/* PHY register access */
static uint16_t lan9250_get_phyreg(FAR struct lan9250_driver_s *priv,
uint8_t phyaddr);
static void lan9250_set_phyreg(FAR struct lan9250_driver_s *priv,
uint8_t phyaddr, uint16_t phydata);
/* SPI buffer transfers */
static void lan9250_recv_buffer(FAR struct lan9250_driver_s *priv,
FAR uint8_t *buffer, size_t buflen);
static inline void lan9250_send_buffer(FAR struct lan9250_driver_s *priv,
FAR const uint8_t *buffer,
size_t buflen);
/* Misc handling */
#ifdef CONFIG_LAN9250_SQI
static void lan9250_enable_sqi(FAR struct lan9250_driver_s *priv);
#endif
static inline void lan9250_sw_reset(FAR struct lan9250_driver_s *priv);
static void lan9250_set_txavailabe(FAR struct lan9250_driver_s *priv,
bool enable);
static int lan9250_reset(FAR struct lan9250_driver_s *priv);
static void lan9250_set_macaddr(FAR struct lan9250_driver_s *priv);
/* Common TX logic */
static int lan9250_transmit(FAR struct lan9250_driver_s *priv);
static int lan9250_txpoll(FAR struct net_driver_s *dev);
/* Interrupt handling */
static void lan9250_netdev_rx(FAR struct lan9250_driver_s *priv);
static void lan9250_phy_isr(FAR struct lan9250_driver_s *priv);
static void lan9250_txavailable_isr(FAR struct lan9250_driver_s *priv);
static void lan9250_rxdone_isr(FAR struct lan9250_driver_s *priv);
static int lan9250_interrupt(int irq, FAR void *context, FAR void *arg);
/* Watchdog timer expirations */
static void lan9250_txtout_timercb(wdparm_t arg);
/* Driver worker */
static void lan9250_txavail_work(FAR void *arg);
static void lan9250_txtout_worker(FAR void *arg);
static void lan9250_int_worker(FAR void *arg);
/* NuttX callback functions */
static int lan9250_ifup(FAR struct net_driver_s *dev);
static int lan9250_ifdown(FAR struct net_driver_s *dev);
static int lan9250_txavail(FAR struct net_driver_s *dev);
#ifdef CONFIG_NET_MCASTGROUP
static int lan9250_addmac(FAR struct net_driver_s *dev,
FAR const uint8_t *mac);
static int lan9250_rmmac(FAR struct net_driver_s *dev,
FAR const uint8_t *mac);
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: lan9250_config_spi
*
* Description:
* Configure the SPI for use with the LAN9250
*
* Input Parameters:
* priv - Reference to the driver state structure
*
* Returned Value:
* None
*
****************************************************************************/
static inline void lan9250_config_spi(FAR struct lan9250_driver_s *priv)
{
#ifdef CONFIG_LAN9250_SPI
FAR struct spi_dev_s *spi = priv->spi;
/* Configure SPI for the LAN9250. */
SPI_SETMODE(spi, CONFIG_LAN9250_SPIMODE);
SPI_SETBITS(spi, 8);
SPI_HWFEATURES(spi, 0);
SPI_SETFREQUENCY(spi, LAN9250_FREQUENCY);
#else
FAR struct qspi_dev_s *qspi = priv->qspi;
/* Configure QSPI for the LAN9250. */
QSPI_SETMODE(qspi, CONFIG_LAN9250_SPIMODE);
QSPI_SETBITS(qspi, 8);
QSPI_HWFEATURES(qspi, 0);
QSPI_SETFREQUENCY(qspi, LAN9250_FREQUENCY);
#endif
}
/****************************************************************************
* Name: lan9250_lock_spi
*
* Description:
* Select the SPI, locking it and re-configuring it if necessary.
*
* Input Parameters:
* priv - Reference to the driver state structure
*
* Returned Value:
* None
*
****************************************************************************/
static void lan9250_lock_spi(FAR struct lan9250_driver_s *priv)
{
#ifdef CONFIG_LAN9250_SPI
/* Lock the SPI bus in case there are multiple devices or tasks competing
* for the SPI bus.
*/
SPI_LOCK(priv->spi, true);
#else
/* Lock the QSPI bus in case there are multiple devices or tasks competing
* for the QSPI bus.
*/
QSPI_LOCK(priv->qspi, true);
#endif
/* Now make sure that the (Q)SPI bus is configured for the LAN9250 (it
* might have gotten configured for a different device while unlocked)
*/
#ifndef CONFIG_LAN9250_SPI_EXCLUSIVE
lan9250_config_spi(priv);
#endif
}
/****************************************************************************
* Name: lan9250_unlock_spi
*
* Description:
* De-select the SPI
*
* Input Parameters:
* priv - Reference to the driver state structure
*
* Returned Value:
* None
*
****************************************************************************/
static inline void lan9250_unlock_spi(FAR struct lan9250_driver_s *priv)
{
#ifdef CONFIG_LAN9250_SPI
/* Relinquish the lock on the bus. */
SPI_LOCK(priv->spi, false);
#else
/* Relinquish the lock on the bus. */
QSPI_LOCK(priv->qspi, false);
#endif
}
/****************************************************************************
* Name: lan9250_get_reg
*
* Description:
* Read a global register value.
*
* Input Parameters:
* priv - Reference to the driver state structure
* address - Register address
*
* Returned Value:
* The value read from the register.
*
****************************************************************************/
static uint32_t lan9250_get_reg(FAR struct lan9250_driver_s *priv,
uint16_t address)
{
#ifdef CONFIG_LAN9250_SPI
# if LAN9250_SPI_READ == LAN9250_SPI_CMD_FREAD
uint8_t cmd_buffer[4];
# else
uint8_t cmd_buffer[3];
# endif
uint32_t regval;
cmd_buffer[0] = LAN9250_SPI_READ;
cmd_buffer[1] = (uint8_t)(address >> 8);
cmd_buffer[2] = (uint8_t)(address >> 0);
# if LAN9250_SPI_READ == LAN9250_SPI_CMD_FREAD
cmd_buffer[3] = 0xff; /* SPI read dummy */
# endif
/* Select LAN9250 chip */
SPI_SELECT(priv->spi, SPIDEV_ETHERNET(0), true);
/* Send the read command and register address */
SPI_SNDBLOCK(priv->spi, cmd_buffer, sizeof(cmd_buffer));
/* Receive register value, total 4 bytes */
SPI_RECVBLOCK(priv->spi, &regval, 4);
/* De-select LAN9250 chip */
SPI_SELECT(priv->spi, SPIDEV_ETHERNET(0), false);
#else
struct qspi_cmdinfo_s cmdinfo;
uint32_t regval;
uint32_t buffer[2];
int ret;
cmdinfo.cmd = LAN9250_SPI_READ;
cmdinfo.addr = address;
cmdinfo.addrlen = sizeof(address);
cmdinfo.buffer = buffer;
cmdinfo.buflen = sizeof(buffer); /* 4 dummy bytes */
cmdinfo.flags = QSPICMD_ADDRESS | QSPICMD_READDATA;
if (priv->sqi_mode)
{
cmdinfo.flags |= QSPICMD_IQUAD;
}
ret = QSPI_COMMAND(priv->qspi, &cmdinfo);
DEBUGASSERT(ret == 0);
regval = buffer[1];
#endif
lan9250_getreg_dump(address, regval);
return regval;
}
/****************************************************************************
* Name: lan9250_set_reg
*
* Description:
* Write to a global register.
*
* Input Parameters:
* priv - Reference to the driver state structure
* address - Register address
* data - The data to send
*
* Returned Value:
* None
*
****************************************************************************/
static void lan9250_set_reg(FAR struct lan9250_driver_s *priv,
uint16_t address,
uint32_t data)
{
#ifdef CONFIG_LAN9250_SPI
uint8_t cmd_buffer[3];
DEBUGASSERT(priv && priv->spi);
cmd_buffer[0] = LAN9250_SPI_WRITE;
cmd_buffer[1] = (uint8_t)(address >> 8);
cmd_buffer[2] = (uint8_t)(address >> 0);
/* Select LAN9250 chip */
SPI_SELECT(priv->spi, SPIDEV_ETHERNET(0), true);
/* Send the read command and register address */
SPI_SNDBLOCK(priv->spi, cmd_buffer, sizeof(cmd_buffer));
/* Receive register value, total 4 bytes */
SPI_SNDBLOCK(priv->spi, &data, 4);
/* De-select LAN9250 chip. */
SPI_SELECT(priv->spi, SPIDEV_ETHERNET(0), false);
#else
struct qspi_cmdinfo_s cmdinfo;
int ret;
cmdinfo.cmd = LAN9250_SPI_WRITE;
cmdinfo.addr = address;
cmdinfo.addrlen = sizeof(address);
cmdinfo.buffer = &data;
cmdinfo.buflen = sizeof(data);
cmdinfo.flags = QSPICMD_ADDRESS | QSPICMD_WRITEDATA;
if (priv->sqi_mode)
{
cmdinfo.flags |= QSPICMD_IQUAD;
}
ret = QSPI_COMMAND(priv->qspi, &cmdinfo);
DEBUGASSERT(ret == 0);
#endif
lan9250_setreg_dump(address, data);
}
/****************************************************************************
* Name: lan9250_wait_ready
*
* Description:
* Wait until LAN9250 is ready.
*
* Input Parameters:
* priv - Reference to the driver state structure
* address - Register address
* mask - Register value mask
* expected - Expected register value
* second - Wait timeout in second
*
* Returned Value:
* None
*
****************************************************************************/
static void lan9250_wait_ready(FAR struct lan9250_driver_s *priv,
uint16_t address, uint32_t mask,
uint32_t expected, uint32_t second)
{
clock_t tout_ticks = clock_systime_ticks() + SEC2TICK(second);
bool timeout = false;
while (1)
{
if ((lan9250_get_reg(priv, address) & mask) == expected)
{
break;
}
else if (clock_systime_ticks() > tout_ticks)
{
timeout = true;
break;
}
}
if (timeout)
{
nerr("ERROR: wait register:0x%02x, mask:0x%08x, expected:0x%08x\n",
address, mask, expected);
}
}
/****************************************************************************
* Name: lan9250_get_macreg
*
* Description:
* Read a MAC register value.
*
* Input Parameters:
* priv - Reference to the driver state structure
* address - MAC register address
*
* Returned Value:
* The value read from the MAC register.
*
****************************************************************************/
static uint32_t lan9250_get_macreg(FAR struct lan9250_driver_s *priv,
uint8_t address)
{
uint32_t regval = address | HMCSRICR_CSRB | HMCSRICR_RNW;
/* Wait for MAC to be ready and send reading register command */
lan9250_wait_ready(priv, LAN9250_HMCSRICR, HMCSRICR_CSRB, 0,
LAN9250_MAC_TIMEOUT);
lan9250_set_reg(priv, LAN9250_HMCSRICR, regval);
/* Wait for MAC to be ready and read register value */
lan9250_wait_ready(priv, LAN9250_HMCSRICR, HMCSRICR_CSRB, 0,
LAN9250_MAC_TIMEOUT);
regval = lan9250_get_reg(priv, LAN9250_HMCSRIDR);
lan9250_getmacreg_dump(address, regval);
return regval;
}
/****************************************************************************
* Name: lan9250_set_macreg
*
* Description:
* Write to a MAC register.
*
* Input Parameters:
* priv - Reference to the driver state structure
* cmd - MAC register address
* data - The data to send
*
* Returned Value:
* None
*
****************************************************************************/
static void lan9250_set_macreg(FAR struct lan9250_driver_s *priv,
uint8_t address, uint32_t data)
{
uint32_t regval = address | HMCSRICR_CSRB;
lan9250_setmacreg_dump(address, data);
/* Wait for MAC to be ready and send writing register command and data */
lan9250_wait_ready(priv, LAN9250_HMCSRICR, HMCSRICR_CSRB, 0,
LAN9250_MAC_TIMEOUT);
lan9250_set_reg(priv, LAN9250_HMCSRIDR, data);
lan9250_set_reg(priv, LAN9250_HMCSRICR, regval);
/* Wait until writing MAC is done */
lan9250_wait_ready(priv, LAN9250_HMCSRICR, HMCSRICR_CSRB, 0,
LAN9250_MAC_TIMEOUT);
}
/****************************************************************************
* Name: lan9250_wait_mac_ready
*
* Description:
* Wait until LAN9250 MAC is ready
*
* Input Parameters:
* priv - Reference to the driver state structure
* address - MAC register address
* mask - MAC register value mask
* expected - Expected MAC register value
* timeout - Wait timeout in second
*
* Returned Value:
* None
*
****************************************************************************/
static void lan9250_wait_mac_ready(FAR struct lan9250_driver_s *priv,
uint8_t address, uint32_t mask,
uint32_t expected, uint32_t second)
{
clock_t tout_ticks = clock_systime_ticks() + SEC2TICK(second);
bool timeout = false;
while (1)
{
if ((lan9250_get_macreg(priv, address) & mask) == expected)
{
break;
}
else if (clock_systime_ticks() > tout_ticks)
{
timeout = true;
break;
}
}
if (timeout)
{
nerr("ERROR: wait MAC register:0x%02x, mask:0x%08x, expected:0x%08x\n",
address, mask, expected);
}
}
/****************************************************************************
* Name: lan9250_get_phyreg
*
* Description:
* Read 16-bits of PHY data.
*
* Input Parameters:
* priv - Reference to the driver state structure
* address - The PHY register address
*
* Returned Value:
* 16-bit value read from the PHY
*
****************************************************************************/
static uint16_t lan9250_get_phyreg(FAR struct lan9250_driver_s *priv,
uint8_t address)
{
uint32_t regval = (1 << HMACMIIAR_PHYA_S) |
(address << HMACMIIAR_MIIRX_S);
/* Wait PHY to be ready and send reading register command */
lan9250_wait_mac_ready(priv, LAN9250_HMACMIIAR, HMACMIIAR_MIIB, 0,
LAN9250_PHY_TIMEOUT);
lan9250_set_macreg(priv, LAN9250_HMACMIIAR, regval);
/* Wait PHY to be ready and read register value */
lan9250_wait_mac_ready(priv, LAN9250_HMACMIIAR, HMACMIIAR_MIIB, 0,
LAN9250_PHY_TIMEOUT);
regval = lan9250_get_macreg(priv, LAN9250_HMACMIIDR);
lan9250_getphyreg_dump(address, regval);
return regval;
}
/****************************************************************************
* Name: lan9250_set_phyreg
*
* Description:
* Write 16-bits of PHY data.
*
* Input Parameters:
* priv - Reference to the driver state structure
* address - The PHY register address
* data - 16-bit data to write to the PHY
*
* Returned Value:
* None
*
****************************************************************************/
static void lan9250_set_phyreg(FAR struct lan9250_driver_s *priv,
uint8_t address,
uint16_t data)
{
uint32_t regval = (1 << HMACMIIAR_PHYA_S) |
(address << HMACMIIAR_MIIRX_S) |
HMACMIIAR_MIIW;
DEBUGASSERT((address & (HMACMIIAR_MIIRX_M >> HMACMIIAR_MIIRX_S))
== address);
lan9250_setphyreg_dump(address, data);
/* Wait PHY to be ready and send writing register command and data */
lan9250_wait_mac_ready(priv, LAN9250_HMACMIIAR, HMACMIIAR_MIIB, 0,
LAN9250_PHY_TIMEOUT);
lan9250_set_macreg(priv, LAN9250_HMACMIIDR, data);
lan9250_set_macreg(priv, LAN9250_HMACMIIAR, regval);
/* Wait PHY until writing is done */
lan9250_wait_mac_ready(priv, LAN9250_HMACMIIAR, HMACMIIAR_MIIB, 0,
LAN9250_PHY_TIMEOUT);
}
/****************************************************************************
* Name: lan9250_recv_buffer
*
* Description:
* Read a buffer of data.
*
* Input Parameters:
* priv - Reference to the driver state structure
* buffer - A pointer to the buffer to read into
* buflen - The number of bytes to read
*
* Returned Value:
* None
*
****************************************************************************/
static void lan9250_recv_buffer(FAR struct lan9250_driver_s *priv,
FAR uint8_t *buffer,
size_t buflen)
{
#ifdef CONFIG_LAN9250_SPI
# if LAN9250_SPI_READ == LAN9250_SPI_CMD_FREAD
uint8_t cmd_buffer[4];
# else
uint8_t cmd_buffer[3];
# endif
DEBUGASSERT(priv && priv->spi);
DEBUGASSERT(buflen <= sizeof(priv->pktbuf));
/* Read dummy data */
lan9250_get_reg(priv, LAN9250_RXDFR);
/* Read valid buffer data */
cmd_buffer[0] = LAN9250_SPI_READ;
cmd_buffer[1] = (uint8_t)(LAN9250_RXDFR >> 8);
cmd_buffer[2] = (uint8_t)(LAN9250_RXDFR >> 0);
# if LAN9250_SPI_READ == LAN9250_SPI_CMD_FREAD
cmd_buffer[3] = 0xff; /* SPI read dummy */
# endif
/* Select LAN9250 chip */
SPI_SELECT(priv->spi, SPIDEV_ETHERNET(0), true);
/* Send the read command and register address */
SPI_SNDBLOCK(priv->spi, cmd_buffer, sizeof(cmd_buffer));
SPI_RECVBLOCK(priv->spi, buffer, buflen);
/* De-select LAN9250 chip */
SPI_SELECT(priv->spi, SPIDEV_ETHERNET(0), false);
#else
struct qspi_meminfo_s meminfo;
int ret;
meminfo.cmd = LAN9250_SPI_READ;
meminfo.addr = LAN9250_RXDFR;
meminfo.addrlen = sizeof(uint16_t);
meminfo.buffer = buffer;
meminfo.buflen = buflen;
meminfo.dummies = 16; /* 8 SPI dummy clock and 4 dummy RX bytes */
meminfo.flags = QSPIMEM_READ;
if (priv->sqi_mode)
{
meminfo.flags |= QSPIMEM_IQUAD;
}
ret = QSPI_MEMORY(priv->qspi, &meminfo);
DEBUGASSERT(ret == 0);
#endif /* CONFIG_LAN9250_SPI */
lan9250_buffer_dump(LAN9250_RXDFR, buffer, buflen);
}
/****************************************************************************
* Name: lan9250_send_buffer
*
* Description:
* Write a buffer of data.
*
* Input Parameters:
* priv - Reference to the driver state structure
* buffer - A pointer to the buffer to write from
* buflen - The number of bytes to write
*
* Returned Value:
* None
*
****************************************************************************/
static inline void lan9250_send_buffer(FAR struct lan9250_driver_s *priv,
FAR const uint8_t *buffer,
size_t buflen)
{
#ifdef CONFIG_LAN9250_SPI
uint8_t cmd_buffer[3];
uint32_t regval;
#else
struct qspi_meminfo_s meminfo;
uint32_t regval;
int ret;
#endif
lan9250_buffer_dump(LAN9250_TXDFR, buffer, buflen);
/**
* LAN9250 SPI write command A fields:
*
* - TX packet length 4 bytes align
* - First frame
* - Last frame
*/
regval = SPI_CMD_WRITE_A_4BA | SPI_CMD_WRITE_A_FS |
SPI_CMD_WRITE_A_LS | buflen;
lan9250_set_reg(priv, LAN9250_TXDFR, regval);
/**
* LAN9250 SPI write command B fields:
*
* - Packet TAG
*/
regval = SPI_CMD_WRITE_B_PT | buflen;
lan9250_set_reg(priv, LAN9250_TXDFR, regval);
#ifdef CONFIG_LAN9250_SPI
/* Read valid buffer data */
cmd_buffer[0] = LAN9250_SPI_WRITE;
cmd_buffer[1] = (uint8_t)(LAN9250_TXDFR >> 8);
cmd_buffer[2] = (uint8_t)(LAN9250_TXDFR >> 0);
/* Select LAN9250 chip */
SPI_SELECT(priv->spi, SPIDEV_ETHERNET(0), true);
/* Send the read command and register address, total 3 bytes */
SPI_SNDBLOCK(priv->spi, cmd_buffer, 3);
/* Write data into FIFO with 4-byte align */
SPI_SNDBLOCK(priv->spi, buffer, LAN9250_ALIGN(buflen));
/* De-select LAN9250 chip */
SPI_SELECT(priv->spi, SPIDEV_ETHERNET(0), false);
#else
meminfo.cmd = LAN9250_SPI_WRITE;
meminfo.addr = LAN9250_TXDFR;
meminfo.addrlen = sizeof(uint16_t);
meminfo.buffer = (void *)buffer;
meminfo.buflen = LAN9250_ALIGN(buflen);
meminfo.dummies = 0;
meminfo.flags = QSPIMEM_WRITE;
if (priv->sqi_mode)
{
meminfo.flags |= QSPIMEM_IQUAD;
}
ret = QSPI_MEMORY(priv->qspi, &meminfo);
DEBUGASSERT(ret == 0);
#endif /* CONFIG_LAN9250_SPI */
}
/****************************************************************************
* Name: lan9250_enable_sqi
*
* Description:
* Send a command to LAN9250 to enable SQI mode.
*
* Input Parameters:
* priv - Reference to the driver state structure
*
* Returned Value:
* None
*
****************************************************************************/
#ifdef CONFIG_LAN9250_SQI
static void lan9250_enable_sqi(FAR struct lan9250_driver_s *priv)
{
clock_t tout_ticks = clock_systime_ticks() +
MSEC2TICK(LAN9250_SQI_TIMEOUT);
struct qspi_cmdinfo_s cmdinfo;
int ret;
cmdinfo.cmd = LAN9250_SPI_ENABLE_SQI;
cmdinfo.addrlen = 0;
cmdinfo.buflen = 0;
cmdinfo.flags = 0;
ret = QSPI_COMMAND(priv->qspi, &cmdinfo);
DEBUGASSERT(ret == 0);
/* USE SQI mode interface */
priv->sqi_mode = true;
/* Check read register value in SQI mode */
while (1)
{
if ((lan9250_get_reg(priv, LAN9250_BOTR) & BOTR_MASK) == BOTR_VAL)
{
break;
}
else if (clock_systime_ticks() > tout_ticks)
{
/* Check timeout and continue to use SPI mode */
priv->sqi_mode = false;
break;
}
}
}
#endif
/****************************************************************************
* Name: lan9250_sw_reset
*
* Description:
* Send a command to reset LAN9250.
*
* Input Parameters:
* priv - Reference to the driver state structure
*
* Returned Value:
* None
*
****************************************************************************/
static inline void lan9250_sw_reset(FAR struct lan9250_driver_s *priv)
{
/* Wait until LAN9250 SPI bus is ready */
lan9250_wait_ready(priv, LAN9250_BOTR, BOTR_MASK,
BOTR_VAL, LAN9250_RESET_TIMEOUT);
/**
* Send a command to reset:
*
* - Digital controller
* - HMAC
* - PHY
*/
lan9250_set_reg(priv, LAN9250_RSTCR, RSTCR_DR | RSTCR_PHYR | RSTCR_HMACR);
/* Wait some time for hardware ready */
lan9250_wait_ready(priv, LAN9250_HWCFGR, HWCFGR_READY,
HWCFGR_READY, LAN9250_RESET_TIMEOUT);
#ifdef CONFIG_LAN9250_SQI
/* Enable SQI mode */
lan9250_enable_sqi(priv);
#endif
}
/****************************************************************************
* Name: lan9250_set_txavailabe
*
* Description:
* Enable or disable TX data FIFO available interrupt.
*
* Input Parameters:
* priv - Reference to the driver state structure
* enable - true: enable this interrupt, false: disable this interrupt
*
* Returned Value:
* None
*
****************************************************************************/
static void lan9250_set_txavailabe(FAR struct lan9250_driver_s *priv,
bool enable)
{
uint32_t regval;
if (enable)
{
/**
* Configure FIFO level interrupt:
*
* - TX data available level: Ethernet maximum packet size, transform
* this value to be block number with 64-byte align
* - TX status level: 255, use maximum value so that this will not be
* actually used by this driver
* - RX status level: 0, so that RX interrupt can trigger once
* receiving one packet
*/
regval = (((LAN9250_PKTBUF_SIZE + 63) / 64) << FLIR_FITXDAL_S) |
FLIR_FITXSL_M;
/* Mark TX data FIFO is unavailable */
priv->tx_available = false;
}
else
{
/**
* Configure FIFO level interrupt:
*
* - TX data available level: 255, so that no interrupt triggers
* - TX status level: 255, use maximum value so that this will not be
* actually used by this driver
* - RX status level: 0, so that RX interrupt can trigger once
* receiving one packet
*/
regval = FLIR_FITXDAL_M | FLIR_FITXSL_M;
/* Mark TX data FIFO is available */
priv->tx_available = true;
}
lan9250_set_reg(priv, LAN9250_FLIR, regval);
}
/****************************************************************************
* Name: lan9250_reset
*
* Description:
* Stop, reset, re-initialize, and restart the LAN9250. This is done
* initially, on ifup, and after a TX timeout.
*
* Input Parameters:
* priv - Reference to the driver state structure
*
* Returned Value:
* OK on success; Negated errno on failure.
*
****************************************************************************/
static int lan9250_reset(FAR struct lan9250_driver_s *priv)
{
uint32_t regval;
nwarn("WARNING: Reset\n");
/* Configure SPI for the LAN9250 */
lan9250_config_spi(priv);
/* reset the LAN9250 by sending command */
lan9250_sw_reset(priv);
/* Read LAN9250 hardware ID */
regval = lan9250_get_reg(priv, LAN9250_CIARR);
if ((regval & CIARR_CID_M) != CIARR_CID_V)
{
nerr("ERROR: Bad Rev ID: %08x\n", regval);
return -ENODEV;
}
ninfo("Rev ID: %08x\n", regval & CIARR_CREV_M);
/**
* Configure TX FIFO size mode to be 8:
*
* - TX data FIFO size: 7680
* - RX data FIFO size: 7680
* - TX status FIFO size: 512
* - RX status FIFO size: 512
*/
regval = HWCFGR_MBO | (8 << HWCFGR_TXFS_S);
lan9250_set_reg(priv, LAN9250_HWCFGR, regval);
/**
* Configure MAC automatic flow control:
*
* - Automatic flow control high level: 110
* - Automatic flow control low level: 55
* - Backpressure duration: 4
* - Flow control on any frame
*/
regval = (110 << HMAFCCFGR_AFCHL_S) |
(55 << HMAFCCFGR_AFCLL_S) |
(4 << HMAFCCFGR_BPD_S) |
HMAFCCFGR_FCOAF;
lan9250_set_reg(priv, LAN9250_HMAFCCFGR, regval);
/**
* Configure host MAC flow control:
*
* - Pause time: 15
* - Flow control
*/
regval = (0xf << HMACFCR_PT_S) | HMACFCR_FLE;
lan9250_set_macreg(priv, LAN9250_HMACFCR, regval);
/**
* Configure interrupt:
*
* - Interrupt De-assertion interval: 10
* - Interrupt output to pin
* - Interrupt pin active output low
* - Interrupt pin push-pull driver
*/
regval = (10 << ICFGR_IDAI_S) |
ICFGR_IRQE | ICFGR_IRQBT;
lan9250_set_reg(priv, LAN9250_ICFGR, regval);
/**
* Configure interrupt trigger source, please refer to macro
* LAN9250_INT_SOURCE.
*/
lan9250_set_reg(priv, LAN9250_IER, LAN9250_INT_SOURCE);
/* Disable TX data FIFO available interrupt */
lan9250_set_txavailabe(priv, false);
/**
* Configure RX:
*
* - RX DMA counter: Ethernet maximum packet size
* - RX data offset: 4, so that need read dummy before reading data
*/
regval = (LAN9250_PKTBUF_SIZE << RXCFGR_RXDMAC_S) | (4 << RXCFGR_RXDO_S);
lan9250_set_reg(priv, LAN9250_RXCFGR, regval);
/**
* Configure remote power management:
*
* - Auto wakeup
* - Disable 1588 clock
* - Disable 1588 timestamp unit clock
* - Energy-detect
* - Wake on
* - PME pin push-pull driver
* - Clear wakeon
* - PME active high
* - PME pin
*/
regval = PMCR_PMWU | PMCR_1588CLKD | PMCR_1588TSUCLKD |
PMCR_EDE | PMCR_WOE | PMCR_PMEBT |
PMCR_WOLS | PMCR_PMEP | PMCR_PMEE;
lan9250_set_reg(priv, LAN9250_PMCR, regval);
/**
* Configure PHY basic control:
*
* - Auto-Negotiation for speed(10 or 100Mbsp) and direction
* (half or full duplex)
*/
lan9250_set_phyreg(priv, LAN9250_PHYBCR, PHYBCR_ANE);
/**
* Configure PHY auto-negotiation advertisement capability:
*
* - Asymmetric pause
* - Symmetric pause
* - 100Base-X full deplex if !CONFIG_LAN9250_HALFDUPPLEX
* - 100Base-X half deplex
* - 10Base-X full deplex if !CONFIG_LAN9250_HALFDUPPLEX
* - 10Base-X half deplex
* - Select IEEE802.3
*/
regval = PHYANAR_AP | PHYANAR_SP | PHYANAR_100BXHD |
PHYANAR_10BXHD | PHYANAR_SF;
#ifndef CONFIG_LAN9250_HALFDUPPLEX
regval |= PHYANAR_100BXFD | PHYANAR_10BXFD;
#endif
lan9250_set_phyreg(priv, LAN9250_PHYANAR, regval);
/**
* Configure PHY special mode:
*
* - PHY mode = 111b, enable all capable and auto-nagotiation
* - PHY address = 1, default value is fixed to 1 by manufacturer
*/
regval = PHYSMR_PM_M | 1;
lan9250_set_phyreg(priv, LAN9250_PHYSMR, regval);
/**
* Configure PHY special control or status indication:
*
* - Port auto-MDIX determined by bits 14 and 13
* - Auto-MDIX
* - Disable SQE tests
*/
regval = PHYSCOSIR_AMDIXC | PHYSCOSIR_AMDIXE | PHYSCOSIR_SQETD;
lan9250_set_phyreg(priv, LAN9250_PHYSCOSIR, regval);
/**
* Configure PHY interrupt source:
*
* - Link up
* - Link down
*/
regval = PHYIER_LU | PHYIER_LD;
lan9250_set_phyreg(priv, LAN9250_PHYIER, regval);
/**
* Configure special control or status:
*
* - Fixed to write 0000010b to reserved filed
*/
lan9250_set_phyreg(priv, LAN9250_PHYSCOSR, PHYSCOSR_RD);
/* Clear interrupt status */
lan9250_set_reg(priv, LAN9250_ISR, UINT32_MAX);
/**
* Configure HMAC control:
*
* - Automaticaly strip the pad field on incoming packets
* - TX enable
* - RX enable
* - Full duplex mode if !CONFIG_LAN9250_HALFDUPPLEX
*/
regval = HMACCR_APS | HMACCR_TXE | HMACCR_RXE;
#ifndef CONFIG_LAN9250_HALFDUPPLEX
regval |= HMACCR_FDM;
#endif
lan9250_set_macreg(priv, LAN9250_HMACCR, regval);
/** Configure TX:
*
* - TX enable
*/
lan9250_set_reg(priv, LAN9250_TXCFGR, TXCFGR_TXE);
return OK;
}
/****************************************************************************
* Name: lan9250_set_macaddr
*
* Description:
* Set the MAC address to the configured value. This is done after ifup
* or after a TX timeout. Note that this means that the interface must
* be down before configuring the MAC addr.
*
* Input Parameters:
* priv - Reference to the driver state structure
*
* Returned Value:
* None
*
****************************************************************************/
static void lan9250_set_macaddr(FAR struct lan9250_driver_s *priv)
{
uint32_t high_addr;
uint32_t low_addr;
FAR uint8_t *mac = priv->dev.d_mac.ether.ether_addr_octet;
high_addr = (((uint32_t)mac[5] << 8) | ((uint32_t)mac[4] << 0));
low_addr = (((uint32_t)mac[3] << 24) | ((uint32_t)mac[2] << 16) |
((uint32_t)mac[1] << 8) | ((uint32_t)mac[0] << 0));
lan9250_set_macreg(priv, LAN9250_HMACAHR, high_addr);
lan9250_set_macreg(priv, LAN9250_HMACALR, low_addr);
}
/****************************************************************************
* Name: lan9250_transmit
*
* Description:
* Start hardware transmission. Called either from:
*
* - pkif interrupt when an application responds to the receipt of data
* by trying to send something, or
* - From watchdog based polling.
*
* Input Parameters:
* priv - Reference to the driver state structure
*
* Returned Value:
* OK on success; a negated errno on failure
*
****************************************************************************/
static int lan9250_transmit(FAR struct lan9250_driver_s *priv)
{
uint32_t regval;
uint16_t free_size;
uint8_t status_size;
regval = lan9250_get_reg(priv, LAN9250_TXFIR);
status_size = (regval & TXFIR_TXSFUS_M) >> TXFIR_TXSFUS_S;
free_size = regval & TXFIR_TXDFFS_M;
ninfo("availabe status size:%d, free space size:%d\n",
status_size, free_size);
/* Clear TX status FIFO if it is no empty by reading data */
for (int i = 0; i < status_size; i++)
{
lan9250_get_reg(priv, LAN9250_TXSFR);
}
if (free_size > priv->dev.d_len)
{
/* Increment statistics */
ninfo("Sending packet, pktlen: %d\n", priv->dev.d_len);
NETDEV_TXPACKETS(&priv->dev);
/* Send the packet: address=priv->dev.d_buf, length=priv->dev.d_len */
lan9250_dump_buf("Transmit Packet", priv->dev.d_buf,
priv->dev.d_len);
lan9250_send_buffer(priv, priv->dev.d_buf, priv->dev.d_len);
if ((free_size - priv->dev.d_len) < LAN9250_PKTBUF_SIZE)
{
/* Enable TX data FIFO available interrupt */
lan9250_set_txavailabe(priv, true);
/**
* Enable the TX timeout watchdog (perhaps restarting the timer)
* when free data space is not enough.
*/
wd_start(&priv->txtout_timer, LAN9250_TX_TIMEOUT,
lan9250_txtout_timercb, (wdparm_t)priv);
}
}
else
{
/* This condition is not supported. */
DEBUGASSERT(0);
}
return OK;
}
/****************************************************************************
* Name: lan9250_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
*
****************************************************************************/
static int lan9250_txpoll(FAR struct net_driver_s *dev)
{
FAR struct lan9250_driver_s *priv =
(FAR struct lan9250_driver_s *)dev->d_private;
/* Send the packet */
lan9250_transmit(priv);
/* Stop the poll now if free FIFO buffer is not enough */
return priv->tx_available ? OK : -EBUSY;
}
/****************************************************************************
* Name: lan9250_txavail_work
*
* Description:
* Perform an out-of-cycle poll on the worker thread.
*
* Parameters:
* dev - The reference to the driver structure
*
* Returned Value:
* None
*
****************************************************************************/
static void lan9250_txavail_work(FAR void *arg)
{
FAR struct lan9250_driver_s *priv = (FAR struct lan9250_driver_s *)arg;
FAR struct net_driver_s *dev = &priv->dev;
/* Lock the network and serialize driver operations if necessary.
* NOTE: Serialization is only required in the case where the driver work
* is performed on an LP worker thread and where more than one LP worker
* thread has been configured.
*/
net_lock();
lan9250_lock_spi(priv);
/* Ignore the notification if the interface is not yet up */
if (IFF_IS_UP(dev->d_flags))
{
/* Check if there is room in the hardware to hold another outgoing
* packet.
*/
/* If so, then poll the network for new XMIT data */
devif_poll(dev, lan9250_txpoll);
}
/* Release lock on the SPI bus and the network */
lan9250_unlock_spi(priv);
net_unlock();
}
/****************************************************************************
* Name: lan9250_phy_isr
*
* Description:
* Process LAN9250 PHY interrupt.
*
* Input Parameters:
* priv - Reference to the driver state structure
*
* Returned Value:
* None
*
****************************************************************************/
static void lan9250_phy_isr(FAR struct lan9250_driver_s *priv)
{
uint16_t regval;
regval = lan9250_get_phyreg(priv, LAN9250_PHYISFR);
if (regval & PHYISFR_LU)
{
ninfo("Link up\n");
IFF_SET_UP(priv->dev.d_flags);
}
else if (regval & PHYISFR_LD)
{
ninfo("Link down\n");
IFF_CLR_UP(priv->dev.d_flags);
}
}
/****************************************************************************
* Name: lan9250_txavailable_isr
*
* Description:
* TX data FIFO available interrupt function.
*
* Input Parameters:
* priv - Reference to the driver state structure
*
* Returned Value:
* None
*
****************************************************************************/
static void lan9250_txavailable_isr(FAR struct lan9250_driver_s *priv)
{
/* Update statistics */
NETDEV_TXDONE(&priv->dev);
/* Disable TX data FIFO available interrupt */
lan9250_set_txavailabe(priv, false);
/* If no further xmits are pending, then cancel the TX timeout */
wd_cancel(&priv->txtout_timer);
/* Then poll the network for new XMIT data */
devif_poll(&priv->dev, lan9250_txpoll);
}
/****************************************************************************
* Name: lan9250_netdev_rx
*
* Description:
* Give the newly received packet to the network.
*
* Input Parameters:
* priv - Reference to the driver state structure
*
* Returned Value:
* None
*
****************************************************************************/
static void lan9250_netdev_rx(FAR struct lan9250_driver_s *priv)
{
#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");
NETDEV_RXIPV4(&priv->dev);
/* 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 */
lan9250_transmit(priv);
}
}
else
#endif /* CONFIG_NET_IPv4 */
#ifdef CONFIG_NET_IPv6
if (BUF->type == HTONS(ETHTYPE_IP6))
{
ninfo("IPv6 frame\n");
NETDEV_RXIPV6(&priv->dev);
/* 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 */
lan9250_transmit(priv);
}
}
else
#endif /* CONFIG_NET_IPv6 */
#ifdef CONFIG_NET_ARP
if (BUF->type == HTONS(ETHTYPE_ARP))
{
ninfo("ARP packet received (%02x)\n", BUF->type);
NETDEV_RXARP(&priv->dev);
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)
{
lan9250_transmit(priv);
}
}
else
#endif /* CONFIG_NET_ARP */
{
nwarn("WARNING: Unsupported packet type dropped (%02x)\n",
HTONS(BUF->type));
NETDEV_RXDROPPED(&priv->dev);
}
}
/****************************************************************************
* Name: lan9250_rxdone_isr
*
* 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
*
****************************************************************************/
static void lan9250_rxdone_isr(FAR struct lan9250_driver_s *priv)
{
uint8_t pktcnt;
uint16_t pktlen;
uint32_t regval;
/* Update statistics */
NETDEV_RXPACKETS(&priv->dev);
/* Check valiad packet count */
regval = lan9250_get_reg(priv, LAN9250_RXFIR);
pktcnt = (regval & RXFIR_RXSFUS_M) >> RXFIR_RXSFUS_S;
ninfo("pktcnt:%d\n", pktcnt);
while (pktcnt--)
{
/* Check valiad packet data size */
regval = lan9250_get_reg(priv, LAN9250_RXSFR);
pktlen = (regval & RXSFF_PL_M) >> RXSFF_PL_S;
ninfo("pktlen:%d\n", pktlen);
if (pktlen)
{
/**
* Copy the data from the receive buffer to priv->dev.d_buf.
* ERDPT should be correctly positioned from the last call to
* end_rdbuffer (above).
*/
lan9250_recv_buffer(priv, priv->dev.d_buf, pktlen);
/**
* Save the packet length (without the 4 byte CRC)
* in priv->dev.d_len.
*/
priv->dev.d_len = pktlen - 4;
lan9250_dump_buf("Received Packet", priv->dev.d_buf,
priv->dev.d_len);
/* Dispatch the packet to the network */
lan9250_netdev_rx(priv);
}
}
}
/****************************************************************************
* Name: lan9250_int_worker
*
* Description:
* Perform interrupt handling logic outside of the interrupt handler (on
* the work queue thread).
*
* Input Parameters:
* arg - The reference to the driver structure (case to void*)
*
* Returned Value:
* None
*
****************************************************************************/
static void lan9250_int_worker(FAR void *arg)
{
FAR struct lan9250_driver_s *priv = (FAR struct lan9250_driver_s *)arg;
uint32_t regval;
DEBUGASSERT(priv);
/* Get exclusive access to both the network and the SPI bus. */
net_lock();
lan9250_lock_spi(priv);
/**
* There is no infinite loop check... if there are always pending
* interrupts, we are just broken.
*/
regval = lan9250_get_reg(priv, LAN9250_ISR);
if ((regval & LAN9250_INT_SOURCE) != 0)
{
/* Handle interrupts according to interrupt resource bit
* settings.
*/
ninfo("Interrupt status: %08x\n", regval);
#if LAN9250_INT_SOURCE & IER_SW
if ((regval & ISR_SW) != 0)
{
ninfo("\tSoftware\n");
}
#endif
#if LAN9250_INT_SOURCE & IER_RAEDY
if ((regval & ISR_READY) != 0)
{
ninfo("\tDevice ready\n");
}
#endif
#if LAN9250_INT_SOURCE & IER_1588
if ((regval & ISR_1588) != 0)
{
ninfo("\t1588\n");
}
#endif
#if LAN9250_INT_SOURCE & IER_PHY
if ((regval & ISR_PHY) != 0)
{
ninfo("\tPHY\n");
lan9250_phy_isr(priv);
}
#endif
#if LAN9250_INT_SOURCE & IER_TXSTOP
if ((regval & ISR_TXS) != 0)
{
ninfo("\tTX stop\n");
}
#endif
#if LAN9250_INT_SOURCE & IER_RXSTOP
if ((regval & ISR_RXS) != 0)
{
ninfo("\tRX stop\n");
}
#endif
#if LAN9250_INT_SOURCE & IER_RXDFH
if ((regval & ISR_RXDFH) != 0)
{
ninfo("\tRX dropped frame count halfway\n");
}
#endif
#if LAN9250_INT_SOURCE & IER_TXIOC
if ((regval & ISR_TXIOC) != 0)
{
ninfo("\tTX IOC\n");
}
#endif
#if LAN9250_INT_SOURCE & IER_RXD
if ((regval & ISR_RXD) != 0)
{
ninfo("\tRX DMA\n");
}
#endif
#if LAN9250_INT_SOURCE & IER_GPT
if ((regval & ISR_GPT) != 0)
{
ninfo("\tGP-timer\n");
}
#endif
#if LAN9250_INT_SOURCE & IER_PME
if ((regval & ISR_PME) != 0)
{
ninfo("\tPower management\n");
}
#endif
#if LAN9250_INT_SOURCE & IER_TXSO
if ((regval & ISR_TXSO) != 0)
{
ninfo("\tTX FIFO status overflow\n");
}
#endif
#if LAN9250_INT_SOURCE & IER_RWT
if ((regval & ISR_RWT) != 0)
{
ninfo("\tRX watchdog timeout\n");
}
#endif
#if LAN9250_INT_SOURCE & IER_RXE
if ((regval & ISR_RXE) != 0)
{
ninfo("\tRX error\n");
}
#endif
#if LAN9250_INT_SOURCE & IER_TXE
if ((regval & ISR_TXE) != 0)
{
ninfo("\tTX error\n");
}
#endif
#if LAN9250_INT_SOURCE & IER_GPIO
if ((regval & ISR_GPIO) != 0)
{
ninfo("\tISR_GPIO event\n");
}
#endif
#if LAN9250_INT_SOURCE & IER_TDFO
if ((regval & ISR_TDFO) != 0)
{
ninfo("\tTX data FIFO overrun\n");
}
#endif
if ((regval & ISR_TDFA) != 0)
{
ninfo("\tTX data FIFO available\n");
lan9250_txavailable_isr(priv);
}
#if LAN9250_INT_SOURCE & IER_TSFF
if ((regval & ISR_TSFF) != 0)
{
ninfo("\tTX status FIFO full\n");
}
#endif
#if LAN9250_INT_SOURCE & IER_TSFL
if ((regval & ISR_TSFL) != 0)
{
ninfo("\tTX status FIFO level\n");
}
#endif
#if LAN9250_INT_SOURCE & IER_RXDF
if ((regval & ISR_RXDF) != 0)
{
ninfo("\tRX dropped frame\n");
}
#endif
#if LAN9250_INT_SOURCE & IER_RSFF
if ((regval & ISR_RSFF) != 0)
{
ninfo("\tRX status FIFO full\n");
}
#endif
#if LAN9250_INT_SOURCE & IER_RSFL
if ((regval & ISR_RSFL) != 0)
{
ninfo("\tRX status FIFO level\n");
lan9250_rxdone_isr(priv);
}
#endif
lan9250_set_reg(priv, LAN9250_ISR, regval);
}
/* Release lock on the SPI bus and the network */
lan9250_unlock_spi(priv);
net_unlock();
/**
* Enable ISR_GPIO interrupts after unlocking net so that application
* could have chance to process Ethernet packet and free iob.
*/
priv->lower->enable(priv->lower);
}
/****************************************************************************
* Name: lan9250_interrupt
*
* Description:
* Hardware interrupt handler
*
* Input Parameters:
* irq - Number of the IRQ that generated the interrupt
* context - Interrupt register state save info (architecture-specific)
* arg - Interrupt private data
*
* Returned Value:
* OK on success
*
****************************************************************************/
static int lan9250_interrupt(int irq, FAR void *context, FAR void *arg)
{
FAR struct lan9250_driver_s *priv;
DEBUGASSERT(arg != NULL);
priv = (FAR struct lan9250_driver_s *)arg;
/* In complex environments, we cannot do SPI transfers from the interrupt
* handler because semaphores are probably used to lock the SPI bus. In
* this case, we will defer processing to the worker thread. This is also
* much kinder in the use of system resources and is, therefore, probably
* a good thing to do in any event.
*/
DEBUGASSERT(work_available(&priv->irq_work));
/* Notice that further ISR_GPIO interrupts are disabled until the work is
* actually performed. This is to prevent overrun of the worker thread.
* Interrupts are re-enabled in lan9250_int_worker() when the work is done.
*/
priv->lower->disable(priv->lower);
return work_queue(LAN9250_WORK, &priv->irq_work, lan9250_int_worker,
(void *)priv, 0);
}
/****************************************************************************
* Name: lan9250_txtout_worker
*
* Description:
* Our TX watchdog timed out. This is the worker thread continuation of
* the watchdog timer interrupt. Reset the hardware and start again.
*
* Input Parameters:
* arg - The reference to the driver structure (case to void*)
*
* Returned Value:
* None
*
****************************************************************************/
static void lan9250_txtout_worker(FAR void *arg)
{
FAR struct lan9250_driver_s *priv = (FAR struct lan9250_driver_s *)arg;
int ret;
nerr("ERROR: Tx timeout\n");
DEBUGASSERT(priv);
/* Get exclusive access to the network */
net_lock();
/* Increment statistics and dump debug info */
NETDEV_TXTIMEOUTS(&priv->dev);
/* Then reset the hardware: Take the interface down, then bring it
* back up
*/
ret = lan9250_ifdown(&priv->dev);
DEBUGASSERT(ret == OK);
ret = lan9250_ifup(&priv->dev);
DEBUGASSERT(ret == OK);
UNUSED(ret);
/* Then poll the network for new XMIT data */
devif_poll(&priv->dev, lan9250_txpoll);
/* Release lock on the network */
net_unlock();
}
/****************************************************************************
* Name: lan9250_txtout_timercb
*
* Description:
* Our TX watchdog timed out. Called from the timer interrupt handler.
* The last TX never completed. Perform work on the worker thread.
*
* Input Parameters:
* arg - The argument
*
* Returned Value:
* None
*
****************************************************************************/
static void lan9250_txtout_timercb(wdparm_t arg)
{
FAR struct lan9250_driver_s *priv = (FAR struct lan9250_driver_s *)arg;
int ret;
/* In complex environments, we cannot do SPI transfers from the timeout
* handler because semaphores are probably used to lock the SPI bus. In
* this case, we will defer processing to the worker thread. This is also
* much kinder in the use of system resources and is, therefore, probably
* a good thing to do in any event.
*/
DEBUGASSERT(priv && work_available(&priv->txtout_work));
/* Notice that Tx timeout watchdog is not active so further Tx timeouts
* can occur until we restart the Tx timeout watchdog.
*/
ret = work_queue(LAN9250_WORK, &priv->txtout_work,
lan9250_txtout_worker, priv, 0);
DEBUGASSERT(ret == OK);
UNUSED(ret);
}
/****************************************************************************
* Name: lan9250_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:
* OK on success; Negated errno on failure.
*
****************************************************************************/
static int lan9250_ifup(FAR struct net_driver_s *dev)
{
FAR struct lan9250_driver_s *priv =
(FAR struct lan9250_driver_s *)dev->d_private;
int ret;
#ifdef CONFIG_LAN9250_REGDEBUG
uint32_t mac_addr[2];
#endif
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));
/* Lock the SPI bus so that we have exclusive access */
lan9250_lock_spi(priv);
/* Initialize Ethernet interface, set the MAC address, and make sure that
* the LAN9250 is not in power save mode.
*/
ret = lan9250_reset(priv);
if (ret == OK)
{
lan9250_set_macaddr(priv);
/* Enable interrupts at the LAN9250. Interrupts are still disabled
* at the interrupt controller.
*/
/* Enable the receiver */
/* Mark the interface up and enable the Ethernet interrupt at the
* controller
*/
priv->lower->enable(priv->lower);
/* Read MAC address here in debug mode */
#ifdef CONFIG_LAN9250_REGDEBUG
mac_addr[0] = lan9250_get_macreg(priv, LAN9250_HMACALR);
mac_addr[1] = lan9250_get_macreg(priv, LAN9250_HMACAHR);
ninfo("MAC: %02x:%02x:%02x:%02x:%02x:%02x\n",
(uint8_t)(mac_addr[1] >> 0), (uint8_t)(mac_addr[1] >> 8),
(uint8_t)(mac_addr[0] >> 24), (uint8_t)(mac_addr[0] >> 16),
(uint8_t)(mac_addr[0] >> 8), (uint8_t)(mac_addr[0] >> 0));
#endif
}
/* Un-lock the SPI bus */
lan9250_unlock_spi(priv);
return ret;
}
/****************************************************************************
* Name: lan9250_ifdown
*
* Description:
* NuttX Callback: Stop the interface.
*
* Input Parameters:
* dev - Reference to the NuttX driver state structure
*
* Returned Value:
* OK on success; Negated errno on failure.
*
****************************************************************************/
static int lan9250_ifdown(FAR struct net_driver_s *dev)
{
FAR struct lan9250_driver_s *priv =
(FAR struct lan9250_driver_s *)dev->d_private;
irqstate_t flags;
ninfo("Taking down: %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));
/* Lock the SPI bus so that we have exclusive access */
lan9250_lock_spi(priv);
/* Reset the device and leave in the power save state */
lan9250_sw_reset(priv);
/* Disable the Ethernet interrupt */
flags = enter_critical_section();
priv->lower->disable(priv->lower);
/* Cancel the TX timeout timers */
wd_cancel(&priv->txtout_timer);
IFF_CLR_UP(priv->dev.d_flags);
leave_critical_section(flags);
/* Un-lock the SPI bus */
lan9250_unlock_spi(priv);
return OK;
}
/****************************************************************************
* Name: lan9250_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:
* OK on success; Negated errno on failure.
*
****************************************************************************/
static int lan9250_txavail(FAR struct net_driver_s *dev)
{
FAR struct lan9250_driver_s *priv =
(FAR struct lan9250_driver_s *)dev->d_private;
irqstate_t flags;
/**
* Lock the SPI bus so that we have exclusive access for but SPI and
* LAN9250 SPI private data.
*/
lan9250_lock_spi(priv);
flags = enter_critical_section();
/**
* Since SPI is locked, so interrupt work must not really process when
* CPU run here, so:
*
* - priv->tx_available = true, TX data FIFO is available and its related
* interrupt is disable.
* - priv->tx_available = false, TX data FIFO is unavailable and its
* related interrupt is enable, so when this interrupt triggers,
* function "devif_poll" will poll the network for new XMIT data.
*/
if (IFF_IS_UP(dev->d_flags) &&
priv->tx_available &&
work_available(&priv->txpoll_work))
{
/* Schedule to serialize the poll on the worker thread. */
work_queue(LAN9250_WORK, &priv->txpoll_work,
lan9250_txavail_work, priv, 0);
}
/* Un-lock the SPI bus */
leave_critical_section(flags);
lan9250_unlock_spi(priv);
return OK;
}
/****************************************************************************
* Name: lan9250_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:
* OK on success; Negated errno on failure.
*
****************************************************************************/
#ifdef CONFIG_NET_MCASTGROUP
static int lan9250_addmac(FAR struct net_driver_s *dev,
FAR const uint8_t *mac)
{
/* #warning "Multicast MAC support not implemented" */
return -ENOSYS;
}
#endif
/****************************************************************************
* Name: lan9250_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:
* OK on success; Negated errno on failure.
*
****************************************************************************/
#ifdef CONFIG_NET_MCASTGROUP
static int lan9250_rmmac(FAR struct net_driver_s *dev,
FAR const uint8_t *mac)
{
/* #warning "Multicast MAC support not implemented" */
return -ENOSYS;
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: lan9250_initialize
*
* Description:
* Initialize the LAN9250 Ethernet driver.
*
* Input Parameters:
* spi - A reference to the platform's SPI driver for the LAN9250 when
* enable CONFIG_LAN9250_SPI
* qspi - A reference to the platform's SQI driver for the LAN9250 when
* enable CONFIG_LAN9250_SQI
* lower - The MCU-specific interrupt used to control low-level MCU
* functions (i.e., LAN9250 GPIO interrupts).
*
* Returned Value:
* OK on success; Negated errno on failure.
*
****************************************************************************/
int lan9250_initialize(
#ifdef CONFIG_LAN9250_SPI
FAR struct spi_dev_s *spi,
#else
FAR struct qspi_dev_s *qspi,
#endif
FAR const struct lan9250_lower_s *lower)
{
FAR struct lan9250_driver_s *priv = &g_lan9250;
FAR struct net_driver_s *dev = &priv->dev;
/* Initialize the driver structure */
memset(priv, 0, sizeof(struct lan9250_driver_s));
dev->d_buf = (uint8_t *)priv->pktbuf;
dev->d_ifup = lan9250_ifup;
dev->d_ifdown = lan9250_ifdown;
dev->d_txavail = lan9250_txavail;
#ifdef CONFIG_NET_MCASTGROUP
dev->d_addmac = lan9250_addmac;
dev->d_rmmac = lan9250_rmmac;
#endif
dev->d_private = priv;
#ifdef CONFIG_LAN9250_SPI
priv->spi = spi;
#else
priv->qspi = qspi;
#endif
priv->lower = lower;
/* Attach the interrupt to the driver (but don't enable it yet) */
if (lower->attach(lower, lan9250_interrupt, priv) < 0)
{
/* We could not attach the ISR to the interrupt */
return -EAGAIN;
}
/* Try to read MAC address from low-level function. */
if (lower->getmac)
{
lower->getmac(lower, priv->dev.d_mac.ether.ether_addr_octet);
}
/* Register the device with the OS so that socket IOCTLs can be performed */
return netdev_register(dev, NET_LL_ETHERNET);
}
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