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nuttx/drivers/net/cs89x0.c

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/****************************************************************************
* drivers/net/cs89x0.c
*
* Copyright (C) 2009-2011, 2014-2015 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_NET_CS89x0)
#include <stdint.h>
#include <stdbool.h>
#include <time.h>
#include <string.h>
#include <debug.h>
#include <errno.h>
#include <arpa/inet.h>
#include <nuttx/arch.h>
#include <nuttx/irq.h>
#include <nuttx/wdog.h>
#include <nuttx/net/arp.h>
#include <nuttx/net/netdev.h>
#ifdef CONFIG_NET_PKT
# include <nuttx/net/pkt.h>
#endif
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#error "Under construction -- do not use"
/* CONFIG_CS89x0_NINTERFACES determines the number of physical interfaces
* that will be supported.
*/
#ifndef CONFIG_CS89x0_NINTERFACES
# define CONFIG_CS89x0_NINTERFACES 1
#endif
/* TX poll delay = 1 seconds. CLK_TCK is the number of clock ticks per second */
#define CS89x0_WDDELAY (1*CLK_TCK)
/* TX timeout = 1 minute */
#define CS89x0_TXTIMEOUT (60*CLK_TCK)
/* This is a helper pointer for accessing the contents of the Ethernet header */
#define BUF ((struct eth_hdr_s *)cs89x0->cs_dev.d_buf)
/* If there is only one CS89x0 instance, then mapping the CS89x0 IRQ to
* a driver state instance is trivial.
*/
#if CONFIG_CS89x0_NINTERFACES == 1
# define cs89x0_mapirq(irq) g_cs89x0[0]
#endif
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
static FAR struct cs89x0_driver_s *g_cs89x0[CONFIG_CS89x0_NINTERFACES];
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* CS89x0 register access */
static uint16_t cs89x0_getreg(struct cs89x0_driver_s *cs89x0, int offset);
static void cs89x0_putreg(struct cs89x0_driver_s *cs89x0, int offset,
uint16_t value);
static uint16_t cs89x0_getppreg(struct cs89x0_driver_s *cs89x0, int addr);
static void cs89x0_putppreg(struct cs89x0_driver_s *cs89x0, int addr,
uint16_t value);
/* Common TX logic */
static int cs89x0_transmit(struct cs89x0_driver_s *cs89x0);
static int cs89x0_txpoll(struct net_driver_s *dev);
/* Interrupt handling */
static void cs89x0_receive(struct cs89x0_driver_s *cs89x0);
static void cs89x0_txdone(struct cs89x0_driver_s *cs89x0, uint16_t isq);
#if CONFIG_CS89x0_NINTERFACES > 1
static inline FAR struct cs89x0_driver_s *cs89x0_mapirq(int irq);
#endif
static int cs89x0_interrupt(int irq, FAR void *context);
/* Watchdog timer expirations */
static void cs89x0_polltimer(int argc, uint32_t arg, ...);
static void cs89x0_txtimeout(int argc, uint32_t arg, ...);
/* NuttX callback functions */
static int cs89x0_ifup(struct net_driver_s *dev);
static int cs89x0_ifdown(struct net_driver_s *dev);
static int cs89x0_txavail(struct net_driver_s *dev);
#ifdef CONFIG_NET_IGMP
static int cs89x0_addmac(struct net_driver_s *dev, FAR const uint8_t *mac);
static int cs89x0_rmmac(struct net_driver_s *dev, FAR const uint8_t *mac);
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Function: cs89x0_getreg and cs89x0_putreg
*
* Description:
* Read from and write to a CS89x0 register
*
* Parameters:
* cs89x0 - Reference to the driver state structure
* offset - Offset to the CS89x0 register
* value - Value to be written (cs89x0_putreg only)
*
* Returned Value:
* cs89x0_getreg: The 16-bit value of the register
* cs89x0_putreg: None
*
****************************************************************************/
static uint16_t cs89x0_getreg(struct cs89x0_driver_s *cs89x0, int offset)
{
#ifdef CONFIG_CS89x0_ALIGN16
return getreg16(s89x0->cs_base + offset);
#else
return (uint16_t)getreg32(s89x0->cs_base + offset);
#endif
}
static void cs89x0_putreg(struct cs89x0_driver_s *cs89x0, int offset, uint16_t value)
{
#ifdef CONFIG_CS89x0_ALIGN16
return putreg16(value, s89x0->cs_base + offset);
#else
return (uint16_t)putreg32((uint32_t)value, s89x0->cs_base + offset);
#endif
}
/****************************************************************************
* Function: cs89x0_getppreg and cs89x0_putppreg
*
* Description:
* Read from and write to a CS89x0 page packet register
*
* Parameters:
* cs89x0 - Reference to the driver state structure
* addr - Address of the CS89x0 page packet register
* value - Value to be written (cs89x0_putppreg only)
*
* Returned Value:
* cs89x0_getppreg: The 16-bit value of the page packet register
* cs89x0_putppreg: None
*
****************************************************************************/
static uint16_t cs89x0_getppreg(struct cs89x0_driver_s *cs89x0, int addr)
{
/* In memory mode, the CS89x0's internal registers and frame buffers are mapped
* into a contiguous 4kb block providing direct access to the internal registers
* and frame buffers.
*/
#ifdef CONFIG_CS89x0_MEMMODE
if (cs89x0->cs_memmode)
{
#ifdef CONFIG_CS89x0_ALIGN16
return getreg16(s89x0->cs_ppbase + (CS89x0_PDATA_OFFSET << ??));
#else
return (uint16_t)getreg32(s89x0->cs_ppbase + (CS89x0_PDATA_OFFSET << ??));
#endif
}
/* When configured in I/O mode, the CS89x0 is accessed through eight, 16-bit
* I/O ports that in the host system's I/O space.
*/
else
#endif
{
#ifdef CONFIG_CS89x0_ALIGN16
putreg16((uint16_t)addr, cs89x0->cs_base + CS89x0_PPTR_OFFSET);
return getreg16(s89x0->cs_base + CS89x0_PDATA_OFFSET);
#else
putreg32((uint32_t)addr, cs89x0->cs_base + CS89x0_PPTR_OFFSET);
return (uint16_t)getreg32(s89x0->cs_base + CS89x0_PDATA_OFFSET);
#endif
}
}
static void cs89x0_putppreg(struct cs89x0_driver_s *cs89x0, int addr, uint16_t value)
{
/* In memory mode, the CS89x0's internal registers and frame buffers are mapped
* into a contiguous 4kb block providing direct access to the internal registers
* and frame buffers.
*/
#ifdef CONFIG_CS89x0_MEMMODE
if (cs89x0->cs_memmode)
{
#ifdef CONFIG_CS89x0_ALIGN16
putreg16(value), cs89x0->cs_ppbase + (CS89x0_PDATA_OFFSET << ??));
#else
putreg32((uint32_t)value, cs89x0->cs_ppbase + (CS89x0_PDATA_OFFSET << ??));
#endif
}
/* When configured in I/O mode, the CS89x0 is accessed through eight, 16-bit
* I/O ports that in the host system's I/O space.
*/
else
#endif
{
#ifdef CONFIG_CS89x0_ALIGN16
putreg16((uint16_t)addr, cs89x0->cs_base + CS89x0_PPTR_OFFSET);
putreg16(value, cs89x0->cs_base + CS89x0_PDATA_OFFSET);
#else
putreg32((uint32_t)addr, cs89x0->cs_base + CS89x0_PPTR_OFFSET);
putreg32((uint32_t)value, cs89x0->cs_base + CS89x0_PDATA_OFFSET);
#endif
}
}
/****************************************************************************
* Function: cs89x0_transmit
*
* Description:
* Start hardware transmission. Called either from the txdone interrupt
* handling or from watchdog based polling.
*
* Parameters:
* cs89x0 - Reference to the driver state structure
*
* Returned Value:
* OK on success; a negated errno on failure
*
* Assumptions:
*
****************************************************************************/
static int cs89x0_transmit(struct cs89x0_driver_s *cs89x0)
{
/* Verify that the hardware is ready to send another packet */
#warning "Missing logic"
/* Increment statistics */
#warning "Missing logic"
/* Disable Ethernet interrupts */
#warning "Missing logic"
/* Send the packet: address=cs89x0->cs_dev.d_buf, length=cs89x0->cs_dev.d_len */
#warning "Missing logic"
/* Restore Ethernet interrupts */
#warning "Missing logic"
/* Setup the TX timeout watchdog (perhaps restarting the timer) */
(void)wd_start(cs89x0->cs_txtimeout, CS89x0_TXTIMEOUT, cs89x0_txtimeout,
1, (wdparm_t)cs89x0);
return OK;
}
/****************************************************************************
* Function: cs89x0_txpoll
*
* Description:
* The transmitter is available, check if uIP 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
*
* Parameters:
* dev - Reference to the NuttX driver state structure
*
* Returned Value:
* OK on success; a negated errno on failure
*
* Assumptions:
*
****************************************************************************/
static int cs89x0_txpoll(struct net_driver_s *dev)
{
struct cs89x0_driver_s *cs89x0 = (struct cs89x0_driver_s *)dev->d_private;
/* 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 (cs89x0->cs_dev.d_len > 0)
{
/* Look up the destination MAC address and add it to the Ethernet
* header.
*/
#ifdef CONFIG_NET_IPv4
#ifdef CONFIG_NET_IPv6
if (IFF_IS_IPv4(cs89x0->cs_dev.d_flags))
#endif
{
arp_out(&cs89x0->cs_dev);
}
#endif /* CONFIG_NET_IPv4 */
#ifdef CONFIG_NET_IPv6
#ifdef CONFIG_NET_IPv4
else
#endif
{
neighbor_out(&cs89x0->cs_dev);
}
#endif /* CONFIG_NET_IPv6 */
/* Send the packet */
cs89x0_transmit(cs89x0);
/* Check if there is room in the CS89x0 to hold another packet. If not,
* return a non-zero value to terminate the poll.
*/
#warning "Missing logic"
}
/* If zero is returned, the polling will continue until all connections have
* been examined.
*/
return 0;
}
/****************************************************************************
* Function: cs89x0_receive
*
* Description:
* An interrupt was received indicating the availability of a new RX packet
*
* Parameters:
* cs89x0 - Reference to the driver state structure
* isq - Interrupt status queue value read by interrupt handler
*
* Returned Value:
* None
*
* Assumptions:
*
****************************************************************************/
static void cs89x0_receive(FAR struct cs89x0_driver_s *cs89x0, uint16_t isq)
{
FAR uint16_t *dest;
uint16_t rxlength;
int nbytes;
/* Check for errors and update statistics */
rxlength = cs89x0_getreg(PPR_RXLENGTH);
if ((isq & RX_OK) == 0)
{
#ifdef CONFIG_NETDEV_STATISTICS
NETDEV_RXERRORS(&cd89x0->cs_dev);
#if 0
if ((isq & RX_RUNT) != 0)
{
}
if ((isq & RX_EXTRA_DATA) != 0)
{
}
if (isq & RX_CRC_ERROR) != 0)
{
if (!(isq & (RX_EXTRA_DATA | RX_RUNT)))
{
}
}
if ((isq & RX_DRIBBLE) != 0)
{
}
#endif
#endif
return;
}
/* Check if the packet is a valid size for the uIP buffer configuration */
if (rxlength > ???)
{
NETDEV_RXERRORS(&cd89x0->cs_dev);
return;
}
/* Copy the data data from the hardware to cs89x0->cs_dev.d_buf. Set
* amount of data in cs89x0->cs_dev.d_len
*/
dest = (FAR uint16_t *)cs89x0->cs_dev.d_buf;
for (nbytes = 0; nbytes < rxlength; nbytes += sizeof(uint16_t))
{
*dest++ = cs89x0_getreg(PPR_RXFRAMELOCATION);
}
NETDEV_RXPACKETS(&cd89x0->cs_dev);
#ifdef CONFIG_NET_PKT
/* When packet sockets are enabled, feed the frame into the packet tap */
pkt_input(&cs89x0->cs_dev);
#endif
/* We only accept IP packets of the configured type and ARP packets */
#ifdef CONFIG_NET_IPv4
if (BUF->type == HTONS(ETHTYPE_IP))
{
nllvdbg("IPv4 frame\n");
NETDEV_RXIPV4(&priv->cs_dev);
/* Handle ARP on input then give the IPv4 packet to the network
* layer
*/
arp_ipin(&cs89x0->cs_dev);
ipv4_input(&cs89x0->cs_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 (cs89x0->cs_dev.d_len > 0)
{
/* Update the Ethernet header with the correct MAC address */
#ifdef CONFIG_NET_IPv6
if (IFF_IS_IPv4(cs89x0->cs_dev.d_flags))
#endif
{
arp_out(&cs89x0->cs_dev);
}
#ifdef CONFIG_NET_IPv6
else
{
neighbor_out(&s89x0->cs_dev);
}
#endif
/* And send the packet */
cs89x0_transmit(cs89x0);
}
}
else
#endif
#ifdef CONFIG_NET_IPv6
if (BUF->type == HTONS(ETHTYPE_IP6))
{
nllvdbg("Iv6 frame\n");
NETDEV_RXIPV6(&priv->cs_dev);
/* Give the IPv6 packet to the network layer */
ipv6_input(&cs89x0->cs_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 (cs89x0->cs_dev.d_len > 0)
{
/* Update the Ethernet header with the correct MAC address */
#ifdef CONFIG_NET_IPv4
if (IFF_IS_IPv4(cs89x0->cs_dev.d_flags))
{
arp_out(&cs89x0->cs_dev);
}
else
#endif
#ifdef CONFIG_NET_IPv6
{
neighbor_out(&cs89x0->cs_dev);
}
#endif
/* And send the packet */
cs89x0_transmit(cs89x0);
}
}
else
#endif
#ifdef CONFIG_NET_ARP
if (BUF->type == htons(ETHTYPE_ARP))
{
NETDEV_RXARP(&priv->cs_dev);
arp_arpin(&cs89x0->cs_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 (cs89x0->cs_dev.d_len > 0)
{
cs89x0_transmit(cs89x0);
}
}
else
#endif
{
nllvdbg("Unrecognized packet type %02x\n", BUF->type);
NETDEV_RXDROPPED(&priv->cs_dev);
}
}
/****************************************************************************
* Function: cs89x0_txdone
*
* Description:
* An interrupt was received indicating that the last TX packet(s) is done
*
* Parameters:
* cs89x0 - Reference to the driver state structure
*
* Returned Value:
* None
*
* Assumptions:
*
****************************************************************************/
static void cs89x0_txdone(struct cs89x0_driver_s *cs89x0, uint16_t isq)
{
/* Check for errors and update statistics. The lower 6-bits of the ISQ
* hold the register address causing the interrupt. We got here because
* those bits indicated */
#ifdef CONFIG_NETDEV_STATISTICS
NETDEV_TXPACKETS(&cd89x0->cs_dev);
if ((isq & ISQ_TXEVENT_TXOK) == 0)
{
NETDEV_TXERRORS(&cd89x0->cs_dev);
}
#if 0
if ((isq & ISQ_TXEVENT_LOSSOFCRS) != 0)
{
}
if ((isq & ISQ_TXEVENT_SQEERROR) != 0)
{
}
if (i(sq & ISQ_TXEVENT_OUTWINDOW) != 0)
{
}
if (isq & TX_16_COL)
{
}
#endif
#endif
/* If no further xmits are pending, then cancel the TX timeout */
wd_cancel(cs89x0->cs_txtimeout);
/* Then poll uIP for new XMIT data */
(void)devif_poll(&cs89x0->cs_dev, cs89x0_txpoll);
}
/****************************************************************************
* Function: cs89x0_mapirq
*
* Description:
* Map an IRQ number to a CS89x0 device state instance. This is only
* necessary to handler the case where the architecture includes more than
* on CS89x0 chip.
*
* Parameters:
* irq - Number of the IRQ that generated the interrupt
*
* Returned Value:
* A reference to device state structure (NULL if irq does not correspond
* to any CS89x0 device).
*
* Assumptions:
*
****************************************************************************/
#if CONFIG_CS89x0_NINTERFACES > 1
static inline FAR struct cs89x0_driver_s *cs89x0_mapirq(int irq)
{
int i;
for (i = 0; i < CONFIG_CS89x0_NINTERFACES; i++)
{
if (g_cs89x0[i] && g_cs89x0[i].irq == irq)
{
return g_cs89x0[i];
}
}
return NULL;
}
#endif
/****************************************************************************
* Function: cs89x0_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 cs89x0_interrupt(int irq, FAR void *context)
{
register struct cs89x0_driver_s *cs89x0 = s89x0_mapirq(irq);
uint16_t isq;
#ifdef CONFIG_DEBUG
if (!cs89x0)
{
return -ENODEV;
}
#endif
/* Read and process all of the events from the ISQ */
while ((isq = cs89x0_getreg(dev, CS89x0_ISQ_OFFSET)) != 0)
{
nvdbg("ISQ: %04x\n", isq);
switch (isq & ISQ_EVENTMASK)
{
case ISQ_RXEVENT:
cs89x0_receive(cs89x0);
break;
case ISQ_TXEVENT:
cs89x0_txdone(cs89x0, isq);
break;
case ISQ_BUFEVENT:
if ((isq & ISQ_BUFEVENT_TXUNDERRUN) != 0)
{
ndbg("Transmit underrun\n");
#ifdef CONFIG_CS89x0_XMITEARLY
cd89x0->cs_txunderrun++;
if (cd89x0->cs_txunderrun == 3)
{
cd89x0->cs_txstart = PPR_TXCMD_TXSTART381;
}
else if (cd89x0->cs_txunderrun == 6)
{
cd89x0->cs_txstart = PPR_TXCMD_TXSTARTFULL;
}
#endif
}
break;
case ISQ_RXMISSEVENT:
NETDEV_RXERRORS(&cd89x0->cs_dev);
break;
case ISQ_TXCOLEVENT:
NETDEV_TXERRORS(&cd89x0->cs_dev);
break;
}
}
return OK;
}
/****************************************************************************
* Function: cs89x0_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:
*
****************************************************************************/
static void cs89x0_txtimeout(int argc, uint32_t arg, ...)
{
struct cs89x0_driver_s *cs89x0 = (struct cs89x0_driver_s *)arg;
/* Increment statistics and dump debug info */
#warning "Missing logic"
/* Then reset the hardware */
#warning "Missing logic"
/* Then poll uIP for new XMIT data */
(void)devif_poll(&cs89x0->cs_dev, cs89x0_txpoll);
}
/****************************************************************************
* Function: cs89x0_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:
*
****************************************************************************/
static void cs89x0_polltimer(int argc, uint32_t arg, ...)
{
struct cs89x0_driver_s *cs89x0 = (struct cs89x0_driver_s *)arg;
/* Check if there is room in the send another TXr packet. */
#warning "Missing logic"
/* If so, update TCP timing states and poll uIP for new XMIT data */
(void)devif_timer(&cs89x0->cs_dev, cs89x0_txpoll);
/* Setup the watchdog poll timer again */
(void)wd_start(cs89x0->cs_txpoll, CS89x0_WDDELAY, cs89x0_polltimer, 1,
(wdparm_t)arg);
}
/****************************************************************************
* Function: cs89x0_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 cs89x0_ifup(struct net_driver_s *dev)
{
struct cs89x0_driver_s *cs89x0 = (struct cs89x0_driver_s *)dev->d_private;
ndbg("Bringing up: %d.%d.%d.%d\n",
dev->d_ipaddr & 0xff, (dev->d_ipaddr >> 8) & 0xff,
(dev->d_ipaddr >> 16) & 0xff, dev->d_ipaddr >> 24);
/* Initialize the Ethernet interface */
#warning "Missing logic"
/* Set and activate a timer process */
(void)wd_start(cs89x0->cs_txpoll, CS89x0_WDDELAY, cs89x0_polltimer, 1,
(wdparm_t)cs89x0);
/* Enable the Ethernet interrupt */
cs89x0->cs_bifup = true;
up_enable_irq(CONFIG_CS89x0_IRQ);
return OK;
}
/****************************************************************************
* Function: cs89x0_ifdown
*
* Description:
* NuttX Callback: Stop the interface.
*
* Parameters:
* dev - Reference to the NuttX driver state structure
*
* Returned Value:
* None
*
* Assumptions:
*
****************************************************************************/
static int cs89x0_ifdown(struct net_driver_s *dev)
{
struct cs89x0_driver_s *cs89x0 = (struct cs89x0_driver_s *)dev->d_private;
irqstate_t flags;
/* Disable the Ethernet interrupt */
flags = enter_critical_section();
up_disable_irq(CONFIG_CS89x0_IRQ);
/* Cancel the TX poll timer and TX timeout timers */
wd_cancel(cs89x0->cs_txpoll);
wd_cancel(cs89x0->cs_txtimeout);
/* Reset the device */
cs89x0->cs_bifup = false;
leave_critical_section(flags);
return OK;
}
/****************************************************************************
* Function: cs89x0_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 cs89x0_txavail(struct net_driver_s *dev)
{
struct cs89x0_driver_s *cs89x0 = (struct cs89x0_driver_s *)dev->d_private;
irqstate_t flags;
flags = enter_critical_section();
/* Ignore the notification if the interface is not yet up */
if (cs89x0->cs_bifup)
{
/* Check if there is room in the hardware to hold another outgoing packet. */
#warning "Missing logic"
/* If so, then poll uIP for new XMIT data */
(void)devif_poll(&cs89x0->cs_dev, cs89x0_txpoll);
}
leave_critical_section(flags);
return OK;
}
/****************************************************************************
* Function: cs89x0_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 cs89x0_addmac(struct net_driver_s *dev, FAR const uint8_t *mac)
{
FAR struct cs89x0_driver_s *priv = (FAR struct cs89x0_driver_s *)dev->d_private;
/* Add the MAC address to the hardware multicast routing table */
#warning "Multicast MAC support not implemented"
return OK;
}
#endif
/****************************************************************************
* Function: cs89x0_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 cs89x0_rmmac(struct net_driver_s *dev, FAR const uint8_t *mac)
{
FAR struct cs89x0_driver_s *priv = (FAR struct cs89x0_driver_s *)dev->d_private;
/* Add the MAC address to the hardware multicast routing table */
#warning "Multicast MAC support not implemented"
return OK;
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Function: cs89x0_initialize
*
* Description:
* Initialize the Ethernet driver
*
* Parameters:
* impl - decribes the implementation of the cs89x00 implementation.
* This reference is retained so so must remain stable throughout the
* life of the driver instance.
* devno - Identifies the device number. This must be a number between
* zero CONFIG_CS89x0_NINTERFACES and the same devno must not be
* initialized twice. The associated network device will be referred
* to with the name "eth" followed by this number (eth0, eth1, etc).
*
* Returned Value:
* OK on success; Negated errno on failure.
*
* Assumptions:
*
****************************************************************************/
/* Initialize the CS89x0 chip and driver */
int cs89x0_initialize(FAR const cs89x0_driver_s *cs89x0, int devno)
{
/* Sanity checks -- only performed with debug enabled */
#ifdef CONFIG_DEBUG
if (!cs89x0 || (unsigned)devno > CONFIG_CS89x0_NINTERFACES || g_cs89x00[devno])
{
return -EINVAL;
}
#endif
/* Check if a Ethernet chip is recognized at its I/O base */
#warning "Missing logic"
/* Attach the IRQ to the driver */
if (irq_attach(cs89x0->irq, cs89x0_interrupt))
{
/* We could not attach the ISR to the ISR */
return -EAGAIN;
}
/* Initialize the driver structure */
g_cs89x[devno] = cs89x0; /* Used to map IRQ back to instance */
cs89x0->cs_dev.d_ifup = cs89x0_ifup; /* I/F down callback */
cs89x0->cs_dev.d_ifdown = cs89x0_ifdown; /* I/F up (new IP address) callback */
cs89x0->cs_dev.d_txavail = cs89x0_txavail; /* New TX data callback */
#ifdef CONFIG_NET_IGMP
cs89x0->cs_dev.d_addmac = cs89x0_addmac; /* Add multicast MAC address */
cs89x0->cs_dev.d_rmmac = cs89x0_rmmac; /* Remove multicast MAC address */
#endif
cs89x0->cs_dev.d_private = (FAR void *)cs89x0; /* Used to recover private state from dev */
/* Create a watchdog for timing polling for and timing of transmisstions */
cs89x0->cs_txpoll = wd_create(); /* Create periodic poll timer */
cs89x0->cs_txtimeout = wd_create(); /* Create TX timeout timer */
/* Read the MAC address from the hardware into cs89x0->cs_dev.d_mac.ether_addr_octet */
/* Register the device with the OS so that socket IOCTLs can be performed */
(void)netdev_register(&cs89x0->cs_dev, NET_LL_ETHERNET);
return OK;
}
#endif /* CONFIG_NET && CONFIG_NET_CS89x0 */
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