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- /****************************************************************************
- * drivers/net/cs89x0.c
- *
- * Copyright (C) 2009-2011 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 <wdog.h>
- #include <errno.h>
- #include <nuttx/irq.h>
- #include <nuttx/arch.h>
- #include <nuttx/net/uip/uip.h>
- #include <nuttx/net/uip/uip-arp.h>
- #include <nuttx/net/uip/uip-arch.h>
- /****************************************************************************
- * 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)
- #define CS89x0_POLLHSEC (1*2)
- /* 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 uip_eth_hdr *)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_uiptxpoll(struct uip_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 uip_driver_s *dev);
- static int cs89x0_ifdown(struct uip_driver_s *dev);
- static int cs89x0_txavail(struct uip_driver_s *dev);
- #ifdef CONFIG_NET_IGMP
- static int cs89x0_addmac(struct uip_driver_s *dev, FAR const uint8_t *mac);
- static int cs89x0_rmmac(struct uip_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, (uint32_t)cs89x0);
- return OK;
- }
- /****************************************************************************
- * Function: cs89x0_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:
- *
- ****************************************************************************/
- static int cs89x0_uiptxpoll(struct uip_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)
- {
- uip_arp_out(&cs89x0->cs_dev);
- 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(struct cs89x0_driver_s *cs89x0, uint16_t isq)
- {
- 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_C89x0_STATISTICS
- cd89x0->cs_stats.rx_errors++;
- if ((isq & RX_RUNT) != 0)
- {
- cd89x0->cs_stats.rx_lengtherrors++;
- }
- if ((isq & RX_EXTRA_DATA) != 0)
- {
- cd89x0->cs_stats.rx_lengtherrors++;
- }
- if (isq & RX_CRC_ERROR) != 0)
- {
- if (!(isq & (RX_EXTRA_DATA|RX_RUNT)))
- {
- cd89x0->cs_stats.rx_crcerrors++;
- }
- }
- if ((isq & RX_DRIBBLE) != 0)
- {
- cd89x0->cs_stats.rx_frameerrors++;
- }
- #endif
- return;
- }
- /* Check if the packet is a valid size for the uIP buffer configuration */
- if (rxlength > ???)
- {
- #ifdef CONFIG_C89x0_STATISTICS
- cd89x0->cs_stats.rx_errors++;
- cd89x0->cs_stats.rx_lengtherrors++;
- #endif
- 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 = (uint16_t*)cs89x0->cs_dev.d_buf;
- for (nbytes = 0; nbytes < rxlength; nbytes += sizeof(uint16_t))
- {
- *dest++ = cs89x0_getreg(PPR_RXFRAMELOCATION);
- }
- #ifdef CONFIG_C89x0_STATISTICS
- cd89x0->cs_stats.rx_packets++;
- #endif
- /* We only accept IP packets of the configured type and ARP packets */
- #ifdef CONFIG_NET_IPv6
- if (BUF->type == HTONS(UIP_ETHTYPE_IP6))
- #else
- if (BUF->type == HTONS(UIP_ETHTYPE_IP))
- #endif
- {
- uip_arp_ipin(&cs89x0->cs_dev);
- uip_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)
- {
- uip_arp_out(&cs89x0->cs_dev);
- cs89x0_transmit(cs89x0);
- }
- }
- else if (BUF->type == htons(UIP_ETHTYPE_ARP))
- {
- uip_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);
- }
- }
- }
- /****************************************************************************
- * 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_C89x0_STATISTICS
- cd89x0->cs_stats.tx_packets++;
- if ((isq & ISQ_TXEVENT_TXOK) == 0)
- {
- cd89x0->cs_stats.tx_errors++;
- }
- if ((isq & ISQ_TXEVENT_LOSSOFCRS) != 0)
- {
- cd89x0->cs_stats.tx_carriererrors++;
- }
- if ((isq & ISQ_TXEVENT_SQEERROR) != 0)
- {
- cd89x0->cs_stats.tx_heartbeaterrors++;
- }
- if (i(sq & ISQ_TXEVENT_OUTWINDOW) != 0)
- {
- cd89x0->cs_stats.tx_windowerrors++;
- }
- if (isq & TX_16_COL)
- {
- cd89x0->cs_stats.tx_abortederrors++;
- }
- #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)uip_poll(&cs89x0->cs_dev, cs89x0_uiptxpoll);
- }
- /****************************************************************************
- * 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:
- #ifdef CONFIG_C89x0_STATISTICS
- cd89x0->cs_stats.rx_missederrors += (isq >>6);
- #endif
- break;
- case ISQ_TXCOLEVENT:
- #ifdef CONFIG_C89x0_STATISTICS
- cd89x0->cs_stats.collisions += (isq >>6);
- #endif
- 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)uip_poll(&cs89x0->cs_dev, cs89x0_uiptxpoll);
- }
- /****************************************************************************
- * 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)uip_timer(&cs89x0->cs_dev, cs89x0_uiptxpoll, CS89x0_POLLHSEC);
- /* Setup the watchdog poll timer again */
- (void)wd_start(cs89x0->cs_txpoll, CS89x0_WDDELAY, cs89x0_polltimer, 1, 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 uip_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, (uint32_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 uip_driver_s *dev)
- {
- struct cs89x0_driver_s *cs89x0 = (struct cs89x0_driver_s *)dev->d_private;
- irqstate_t flags;
- /* Disable the Ethernet interrupt */
- flags = irqsave();
- 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;
- irqrestore(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 uip_driver_s *dev)
- {
- struct cs89x0_driver_s *cs89x0 = (struct cs89x0_driver_s *)dev->d_private;
- irqstate_t flags;
- flags = irqsave();
- /* 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)uip_poll(&cs89x0->cs_dev, cs89x0_uiptxpoll);
- }
- irqrestore(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 uip_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 uip_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 = (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);
- return OK;
- }
- #endif /* CONFIG_NET && CONFIG_NET_CS89x0 */
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