/**
* @file
*
* @ingroup lpc_eth
*
* @brief Ethernet driver.
*/
/*
* Copyright (c) 2009-2011 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Obere Lagerstr. 30
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*/
#define __INSIDE_RTEMS_BSD_TCPIP_STACK__ 1
#define __BSD_VISIBLE 1
#include <errno.h>
#include <inttypes.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <rtems.h>
#include <rtems/rtems_bsdnet.h>
#include <rtems/rtems_mii_ioctl.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/mbuf.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <bsp.h>
#include <bsp/irq.h>
#include <bsp/lpc-ethernet-config.h>
#include <bsp/utility.h>
#include <rtems/status-checks.h>
#if MCLBYTES > (2 * 1024)
#error "MCLBYTES to large"
#endif
#ifdef LPC_ETH_CONFIG_USE_TRANSMIT_DMA
#define LPC_ETH_CONFIG_TX_BUF_SIZE sizeof(struct mbuf *)
#else
#define LPC_ETH_CONFIG_TX_BUF_SIZE 1518U
#endif
#define DEFAULT_PHY 0
#define WATCHDOG_TIMEOUT 5
typedef struct {
uint32_t start;
uint32_t control;
} lpc_eth_transfer_descriptor;
typedef struct {
uint32_t info;
uint32_t hash_crc;
} lpc_eth_receive_status;
typedef struct {
uint32_t mac1;
uint32_t mac2;
uint32_t ipgt;
uint32_t ipgr;
uint32_t clrt;
uint32_t maxf;
uint32_t supp;
uint32_t test;
uint32_t mcfg;
uint32_t mcmd;
uint32_t madr;
uint32_t mwtd;
uint32_t mrdd;
uint32_t mind;
uint32_t reserved_0 [2];
uint32_t sa0;
uint32_t sa1;
uint32_t sa2;
uint32_t reserved_1 [45];
uint32_t command;
uint32_t status;
uint32_t rxdescriptor;
uint32_t rxstatus;
uint32_t rxdescriptornum;
uint32_t rxproduceindex;
uint32_t rxconsumeindex;
uint32_t txdescriptor;
uint32_t txstatus;
uint32_t txdescriptornum;
uint32_t txproduceindex;
uint32_t txconsumeindex;
uint32_t reserved_2 [10];
uint32_t tsv0;
uint32_t tsv1;
uint32_t rsv;
uint32_t reserved_3 [3];
uint32_t flowcontrolcnt;
uint32_t flowcontrolsts;
uint32_t reserved_4 [34];
uint32_t rxfilterctrl;
uint32_t rxfilterwolsts;
uint32_t rxfilterwolclr;
uint32_t reserved_5 [1];
uint32_t hashfilterl;
uint32_t hashfilterh;
uint32_t reserved_6 [882];
uint32_t intstatus;
uint32_t intenable;
uint32_t intclear;
uint32_t intset;
uint32_t reserved_7 [1];
uint32_t powerdown;
} lpc_eth_controller;
static volatile lpc_eth_controller *const lpc_eth =
(volatile lpc_eth_controller *) LPC_ETH_CONFIG_REG_BASE;
/* ETH_RX_CTRL */
#define ETH_RX_CTRL_SIZE_MASK 0x000007ffU
#define ETH_RX_CTRL_INTERRUPT 0x80000000U
/* ETH_RX_STAT */
#define ETH_RX_STAT_RXSIZE_MASK 0x000007ffU
#define ETH_RX_STAT_BYTES 0x00000100U
#define ETH_RX_STAT_CONTROL_FRAME 0x00040000U
#define ETH_RX_STAT_VLAN 0x00080000U
#define ETH_RX_STAT_FAIL_FILTER 0x00100000U
#define ETH_RX_STAT_MULTICAST 0x00200000U
#define ETH_RX_STAT_BROADCAST 0x00400000U
#define ETH_RX_STAT_CRC_ERROR 0x00800000U
#define ETH_RX_STAT_SYMBOL_ERROR 0x01000000U
#define ETH_RX_STAT_LENGTH_ERROR 0x02000000U
#define ETH_RX_STAT_RANGE_ERROR 0x04000000U
#define ETH_RX_STAT_ALIGNMENT_ERROR 0x08000000U
#define ETH_RX_STAT_OVERRUN 0x10000000U
#define ETH_RX_STAT_NO_DESCRIPTOR 0x20000000U
#define ETH_RX_STAT_LAST_FLAG 0x40000000U
#define ETH_RX_STAT_ERROR 0x80000000U
/* ETH_TX_CTRL */
#define ETH_TX_CTRL_SIZE_MASK 0x7ffU
#define ETH_TX_CTRL_SIZE_SHIFT 0
#define ETH_TX_CTRL_OVERRIDE 0x04000000U
#define ETH_TX_CTRL_HUGE 0x08000000U
#define ETH_TX_CTRL_PAD 0x10000000U
#define ETH_TX_CTRL_CRC 0x20000000U
#define ETH_TX_CTRL_LAST 0x40000000U
#define ETH_TX_CTRL_INTERRUPT 0x80000000U
/* ETH_TX_STAT */
#define ETH_TX_STAT_COLLISION_COUNT_MASK 0x01e00000U
#define ETH_TX_STAT_DEFER 0x02000000U
#define ETH_TX_STAT_EXCESSIVE_DEFER 0x04000000U
#define ETH_TX_STAT_EXCESSIVE_COLLISION 0x08000000U
#define ETH_TX_STAT_LATE_COLLISION 0x10000000U
#define ETH_TX_STAT_UNDERRUN 0x20000000U
#define ETH_TX_STAT_NO_DESCRIPTOR 0x40000000U
#define ETH_TX_STAT_ERROR 0x80000000U
/* ETH_INT */
#define ETH_INT_RX_OVERRUN 0x00000001U
#define ETH_INT_RX_ERROR 0x00000002U
#define ETH_INT_RX_FINISHED 0x00000004U
#define ETH_INT_RX_DONE 0x00000008U
#define ETH_INT_TX_UNDERRUN 0x00000010U
#define ETH_INT_TX_ERROR 0x00000020U
#define ETH_INT_TX_FINISHED 0x00000040U
#define ETH_INT_TX_DONE 0x00000080U
#define ETH_INT_SOFT 0x00001000U
#define ETH_INT_WAKEUP 0x00002000U
/* ETH_RX_FIL_CTRL */
#define ETH_RX_FIL_CTRL_ACCEPT_UNICAST 0x00000001U
#define ETH_RX_FIL_CTRL_ACCEPT_BROADCAST 0x00000002U
#define ETH_RX_FIL_CTRL_ACCEPT_MULTICAST 0x00000004U
#define ETH_RX_FIL_CTRL_ACCEPT_UNICAST_HASH 0x00000008U
#define ETH_RX_FIL_CTRL_ACCEPT_MULTICAST_HASH 0x00000010U
#define ETH_RX_FIL_CTRL_ACCEPT_PERFECT 0x00000020U
#define ETH_RX_FIL_CTRL_MAGIC_PACKET_WOL 0x00001000U
#define ETH_RX_FIL_CTRL_RX_FILTER_WOL 0x00002000U
/* ETH_CMD */
#define ETH_CMD_RX_ENABLE 0x00000001U
#define ETH_CMD_TX_ENABLE 0x00000002U
#define ETH_CMD_REG_RESET 0x00000008U
#define ETH_CMD_TX_RESET 0x00000010U
#define ETH_CMD_RX_RESET 0x00000020U
#define ETH_CMD_PASS_RUNT_FRAME 0x00000040U
#define ETH_CMD_PASS_RX_FILTER 0X00000080U
#define ETH_CMD_TX_FLOW_CONTROL 0x00000100U
#define ETH_CMD_RMII 0x00000200U
#define ETH_CMD_FULL_DUPLEX 0x00000400U
/* ETH_STAT */
#define ETH_STAT_RX_ACTIVE 0x00000001U
#define ETH_STAT_TX_ACTIVE 0x00000002U
/* ETH_MAC2 */
#define ETH_MAC2_FULL_DUPLEX BSP_BIT32(8)
/* ETH_SUPP */
#define ETH_SUPP_SPEED BSP_BIT32(8)
/* ETH_MCFG */
#define ETH_MCFG_CLOCK_SELECT(val) BSP_FLD32(val, 2, 4)
/* ETH_MCMD */
#define ETH_MCMD_READ BSP_BIT32(0)
#define ETH_MCMD_SCAN BSP_BIT32(1)
/* ETH_MADR */
#define ETH_MADR_REG(val) BSP_FLD32(val, 0, 4)
#define ETH_MADR_PHY(val) BSP_FLD32(val, 8, 12)
/* ETH_MIND */
#define ETH_MIND_BUSY BSP_BIT32(0)
#define ETH_MIND_SCANNING BSP_BIT32(1)
#define ETH_MIND_NOT_VALID BSP_BIT32(2)
#define ETH_MIND_MII_LINK_FAIL BSP_BIT32(3)
/* Events */
#define LPC_ETH_EVENT_INITIALIZE RTEMS_EVENT_1
#define LPC_ETH_EVENT_START RTEMS_EVENT_2
#define LPC_ETH_EVENT_INTERRUPT RTEMS_EVENT_3
/* Status */
#define LPC_ETH_INTERRUPT_RECEIVE \
(ETH_INT_RX_ERROR | ETH_INT_RX_FINISHED | ETH_INT_RX_DONE)
#define LPC_ETH_INTERRUPT_TRANSMIT \
(ETH_INT_TX_DONE | ETH_INT_TX_FINISHED | ETH_INT_TX_ERROR)
#define LPC_ETH_RX_STAT_ERRORS \
(ETH_RX_STAT_CRC_ERROR \
| ETH_RX_STAT_SYMBOL_ERROR \
| ETH_RX_STAT_LENGTH_ERROR \
| ETH_RX_STAT_ALIGNMENT_ERROR \
| ETH_RX_STAT_OVERRUN \
| ETH_RX_STAT_NO_DESCRIPTOR)
#define LPC_ETH_LAST_FRAGMENT_FLAGS \
(ETH_TX_CTRL_OVERRIDE \
| ETH_TX_CTRL_PAD \
| ETH_TX_CTRL_CRC \
| ETH_TX_CTRL_INTERRUPT \
| ETH_TX_CTRL_LAST)
/* Debug */
#ifdef DEBUG
#define LPC_ETH_PRINTF(...) printf(__VA_ARGS__)
#define LPC_ETH_PRINTK(...) printk(__VA_ARGS__)
#else
#define LPC_ETH_PRINTF(...)
#define LPC_ETH_PRINTK(...)
#endif
typedef enum {
LPC_ETH_NOT_INITIALIZED,
LPC_ETH_INITIALIZED,
LPC_ETH_STARTED,
LPC_ETH_RUNNING
} lpc_eth_state;
typedef struct {
struct arpcom arpcom;
lpc_eth_state state;
struct rtems_mdio_info mdio;
uint32_t anlpar;
rtems_id receive_task;
rtems_id transmit_task;
unsigned rx_unit_count;
unsigned tx_unit_count;
volatile lpc_eth_transfer_descriptor *rx_desc_table;
volatile lpc_eth_receive_status *rx_status_table;
struct mbuf **rx_mbuf_table;
volatile lpc_eth_transfer_descriptor *tx_desc_table;
volatile uint32_t *tx_status_table;
void *tx_buf_table;
unsigned received_frames;
unsigned receive_interrupts;
unsigned transmitted_frames;
unsigned transmit_interrupts;
unsigned receive_overrun_errors;
unsigned receive_fragment_errors;
unsigned receive_crc_errors;
unsigned receive_symbol_errors;
unsigned receive_length_errors;
unsigned receive_alignment_errors;
unsigned receive_no_descriptor_errors;
unsigned receive_fatal_errors;
unsigned transmit_underrun_errors;
unsigned transmit_late_collision_errors;
unsigned transmit_excessive_collision_errors;
unsigned transmit_excessive_defer_errors;
unsigned transmit_no_descriptor_errors;
unsigned transmit_overflow_errors;
unsigned transmit_fatal_errors;
} lpc_eth_driver_entry;
static lpc_eth_driver_entry lpc_eth_driver_data = {
.state = LPC_ETH_NOT_INITIALIZED,
.receive_task = RTEMS_ID_NONE,
.transmit_task = RTEMS_ID_NONE
};
static inline uint32_t lpc_eth_increment(
uint32_t value,
uint32_t cycle
)
{
if (value < cycle) {
return ++value;
} else {
return 0;
}
}
static void lpc_eth_enable_promiscous_mode(bool enable)
{
if (enable) {
lpc_eth->rxfilterctrl = ETH_RX_FIL_CTRL_ACCEPT_UNICAST
| ETH_RX_FIL_CTRL_ACCEPT_MULTICAST
| ETH_RX_FIL_CTRL_ACCEPT_BROADCAST;
} else {
lpc_eth->rxfilterctrl = ETH_RX_FIL_CTRL_ACCEPT_PERFECT
| ETH_RX_FIL_CTRL_ACCEPT_MULTICAST_HASH
| ETH_RX_FIL_CTRL_ACCEPT_BROADCAST;
}
}
static void lpc_eth_interrupt_handler(void *arg)
{
lpc_eth_driver_entry *e = (lpc_eth_driver_entry *) arg;
rtems_event_set re = 0;
rtems_event_set te = 0;
uint32_t ie = 0;
/* Get interrupt status */
uint32_t im = lpc_eth->intenable;
uint32_t is = lpc_eth->intstatus & im;
/* Check receive interrupts */
if ((is & ETH_INT_RX_OVERRUN) != 0) {
re = LPC_ETH_EVENT_INITIALIZE;
++e->receive_fatal_errors;
} else if ((is & LPC_ETH_INTERRUPT_RECEIVE) != 0) {
re = LPC_ETH_EVENT_INTERRUPT;
ie |= LPC_ETH_INTERRUPT_RECEIVE;
}
/* Send events to receive task */
if (re != 0) {
++e->receive_interrupts;
(void) rtems_event_send(e->receive_task, re);
}
/* Check transmit interrupts */
if ((is & ETH_INT_TX_UNDERRUN) != 0) {
te = LPC_ETH_EVENT_INITIALIZE;
++e->transmit_fatal_errors;
} else if ((is & LPC_ETH_INTERRUPT_TRANSMIT) != 0) {
te = LPC_ETH_EVENT_INTERRUPT;
ie |= LPC_ETH_INTERRUPT_TRANSMIT;
}
/* Send events to transmit task */
if (te != 0) {
++e->transmit_interrupts;
(void) rtems_event_send(e->transmit_task, te);
}
LPC_ETH_PRINTK("interrupt: rx = 0x%08x, tx = 0x%08x\n", re, te);
/* Update interrupt mask */
lpc_eth->intenable = im & ~ie;
/* Clear interrupts */
lpc_eth->intclear = is;
}
static void lpc_eth_enable_receive_interrupts(void)
{
rtems_interrupt_level level;
rtems_interrupt_disable(level);
lpc_eth->intenable |= LPC_ETH_INTERRUPT_RECEIVE;
rtems_interrupt_enable(level);
}
static void lpc_eth_disable_receive_interrupts(void)
{
rtems_interrupt_level level;
rtems_interrupt_disable(level);
lpc_eth->intenable &= ~LPC_ETH_INTERRUPT_RECEIVE;
rtems_interrupt_enable(level);
}
static void lpc_eth_enable_transmit_interrupts(void)
{
rtems_interrupt_level level;
rtems_interrupt_disable(level);
lpc_eth->intenable |= LPC_ETH_INTERRUPT_TRANSMIT;
rtems_interrupt_enable(level);
}
static void lpc_eth_disable_transmit_interrupts(void)
{
rtems_interrupt_level level;
rtems_interrupt_disable(level);
lpc_eth->intenable &= ~LPC_ETH_INTERRUPT_TRANSMIT;
rtems_interrupt_enable(level);
}
#define LPC_ETH_RX_DATA_OFFSET 2
static struct mbuf *lpc_eth_new_mbuf(struct ifnet *ifp, bool wait)
{
struct mbuf *m = NULL;
int mw = wait ? M_WAIT : M_DONTWAIT;
MGETHDR(m, mw, MT_DATA);
if (m != NULL) {
MCLGET(m, mw);
if ((m->m_flags & M_EXT) != 0) {
/* Set receive interface */
m->m_pkthdr.rcvif = ifp;
/* Adjust by two bytes for proper IP header alignment */
m->m_data = mtod(m, char *) + LPC_ETH_RX_DATA_OFFSET;
return m;
} else {
m_free(m);
}
}
return NULL;
}
static bool lpc_eth_add_new_mbuf(
struct ifnet *ifp,
volatile lpc_eth_transfer_descriptor *desc,
struct mbuf **mbufs,
uint32_t i,
bool wait
)
{
/* New mbuf */
struct mbuf *m = lpc_eth_new_mbuf(ifp, wait);
/* Check mbuf */
if (m != NULL) {
/* Cache invalidate */
rtems_cache_invalidate_multiple_data_lines(
mtod(m, void *),
MCLBYTES - LPC_ETH_RX_DATA_OFFSET
);
/* Add mbuf to queue */
desc [i].start = mtod(m, uint32_t);
desc [i].control = (MCLBYTES - LPC_ETH_RX_DATA_OFFSET - 1)
| ETH_RX_CTRL_INTERRUPT;
/* Cache flush of descriptor */
rtems_cache_flush_multiple_data_lines(
(void *) &desc [i],
sizeof(desc [0])
);
/* Add mbuf to table */
mbufs [i] = m;
return true;
} else {
return false;
}
}
static void lpc_eth_receive_task(void *arg)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
rtems_event_set events = 0;
lpc_eth_driver_entry *const e = (lpc_eth_driver_entry *) arg;
struct ifnet *const ifp = &e->arpcom.ac_if;
volatile lpc_eth_transfer_descriptor *const desc = e->rx_desc_table;
volatile lpc_eth_receive_status *const status = e->rx_status_table;
struct mbuf **const mbufs = e->rx_mbuf_table;
uint32_t const index_max = e->rx_unit_count - 1;
uint32_t produce_index = 0;
uint32_t consume_index = 0;
uint32_t receive_index = 0;
LPC_ETH_PRINTF("%s\n", __func__);
/* Main event loop */
while (true) {
bool wait_for_mbuf = false;
/* Wait for events */
sc = rtems_bsdnet_event_receive(
LPC_ETH_EVENT_INITIALIZE | LPC_ETH_EVENT_INTERRUPT,
RTEMS_EVENT_ANY | RTEMS_WAIT,
RTEMS_NO_TIMEOUT,
&events
);
RTEMS_CLEANUP_SC(sc, cleanup, "wait for events");
LPC_ETH_PRINTF("rx: wake up: 0x%08" PRIx32 "\n", events);
/* Initialize receiver? */
if ((events & LPC_ETH_EVENT_INITIALIZE) != 0) {
/* Disable receive interrupts */
lpc_eth_disable_receive_interrupts();
/* Disable receiver */
lpc_eth->command &= ~ETH_CMD_RX_ENABLE;
/* Wait for inactive status */
while ((lpc_eth->status & ETH_STAT_RX_ACTIVE) != 0) {
/* Wait */
}
/* Reset */
lpc_eth->command |= ETH_CMD_RX_RESET;
/* Clear receive interrupts */
lpc_eth->intclear = LPC_ETH_INTERRUPT_RECEIVE;
/* Move existing mbufs to the front */
consume_index = 0;
for (produce_index = 0; produce_index <= index_max; ++produce_index) {
if (mbufs [produce_index] != NULL) {
mbufs [consume_index] = mbufs [produce_index];
++consume_index;
}
}
/* Fill receive queue */
for (
produce_index = consume_index;
produce_index <= index_max;
++produce_index
) {
lpc_eth_add_new_mbuf(ifp, desc, mbufs, produce_index, true);
}
/* Receive descriptor table */
lpc_eth->rxdescriptornum = index_max;
lpc_eth->rxdescriptor = (uint32_t) desc;
lpc_eth->rxstatus = (uint32_t) status;
/* Initialize indices */
produce_index = lpc_eth->rxproduceindex;
consume_index = lpc_eth->rxconsumeindex;
receive_index = consume_index;
/* Enable receiver */
lpc_eth->command |= ETH_CMD_RX_ENABLE;
/* Enable receive interrupts */
lpc_eth_enable_receive_interrupts();
/* Wait for events */
continue;
}
while (true) {
/* Clear receive interrupt status */
lpc_eth->intclear = LPC_ETH_INTERRUPT_RECEIVE;
/* Get current produce index */
produce_index = lpc_eth->rxproduceindex;
if (receive_index != produce_index) {
uint32_t stat = 0;
/* Fragment mbuf */
struct mbuf *m = mbufs [receive_index];
/* Fragment status */
rtems_cache_invalidate_multiple_data_lines(
(void *) &status [receive_index],
sizeof(status [0])
);
stat = status [receive_index].info;
/* Remove mbuf from table */
mbufs [receive_index] = NULL;
if (
(stat & ETH_RX_STAT_LAST_FLAG) != 0
&& (stat & LPC_ETH_RX_STAT_ERRORS) == 0
) {
/* Ethernet header */
struct ether_header *eh = mtod(m, struct ether_header *);
/* Discard Ethernet header and CRC */
int sz = (int) (stat & ETH_RX_STAT_RXSIZE_MASK) + 1
- ETHER_HDR_LEN - ETHER_CRC_LEN;
/* Update mbuf */
m->m_len = sz;
m->m_pkthdr.len = sz;
m->m_data = mtod(m, char *) + ETHER_HDR_LEN;
LPC_ETH_PRINTF("rx: %02" PRIu32 ": %u\n", receive_index, sz);
/* Hand over */
ether_input(ifp, eh, m);
/* Increment received frames counter */
++e->received_frames;
} else {
/* Release mbuf */
m_free(m);
/* Update error counters */
if ((stat & ETH_RX_STAT_OVERRUN) != 0) {
++e->receive_overrun_errors;
}
if ((stat & ETH_RX_STAT_LAST_FLAG) == 0) {
++e->receive_fragment_errors;
}
if ((stat & ETH_RX_STAT_CRC_ERROR) != 0) {
++e->receive_crc_errors;
}
if ((stat & ETH_RX_STAT_SYMBOL_ERROR) != 0) {
++e->receive_symbol_errors;
}
if ((stat & ETH_RX_STAT_LENGTH_ERROR) != 0) {
++e->receive_length_errors;
}
if ((stat & ETH_RX_STAT_ALIGNMENT_ERROR) != 0) {
++e->receive_alignment_errors;
}
if ((stat & ETH_RX_STAT_NO_DESCRIPTOR) != 0) {
++e->receive_no_descriptor_errors;
}
}
/* Increment receive index */
receive_index = lpc_eth_increment(receive_index, index_max);
} else {
/* Nothing to do, enable receive interrupts */
lpc_eth_enable_receive_interrupts();
break;
}
}
/* Wait for mbuf? */
wait_for_mbuf =
lpc_eth_increment(produce_index, index_max) == consume_index;
/* Fill queue with new mbufs */
while (consume_index != produce_index) {
/* Add new mbuf to queue */
if (
!lpc_eth_add_new_mbuf(ifp, desc, mbufs, consume_index, wait_for_mbuf)
) {
break;
}
/* We wait for at most one mbuf */
wait_for_mbuf = false;
/* Increment consume index */
consume_index = lpc_eth_increment(consume_index, index_max);
/* Update consume indices */
lpc_eth->rxconsumeindex = consume_index;
}
}
cleanup:
/* Clear task ID */
e->receive_task = RTEMS_ID_NONE;
/* Release network semaphore */
rtems_bsdnet_semaphore_release();
/* Terminate self */
(void) rtems_task_delete(RTEMS_SELF);
}
static struct mbuf *lpc_eth_next_fragment(
struct ifnet *ifp,
struct mbuf *m,
uint32_t *ctrl
)
{
struct mbuf *n = NULL;
int size = 0;
while (true) {
if (m == NULL) {
/* Dequeue first fragment of the next frame */
IF_DEQUEUE(&ifp->if_snd, m);
/* Empty queue? */
if (m == NULL) {
return m;
}
}
/* Get fragment size */
size = m->m_len;
if (size > 0) {
/* Now we have a not empty fragment */
break;
} else {
/* Discard empty fragments */
m = m_free(m);
}
}
/* Set fragment size */
*ctrl = (uint32_t) (size - 1);
/* Discard empty successive fragments */
n = m->m_next;
while (n != NULL && n->m_len <= 0) {
n = m_free(n);
}
m->m_next = n;
/* Is our fragment the last in the frame? */
if (n == NULL) {
*ctrl |= LPC_ETH_LAST_FRAGMENT_FLAGS;
}
return m;
}
static void lpc_eth_transmit_task(void *arg)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
rtems_event_set events = 0;
lpc_eth_driver_entry *e = (lpc_eth_driver_entry *) arg;
struct ifnet *ifp = &e->arpcom.ac_if;
volatile lpc_eth_transfer_descriptor *const desc = e->tx_desc_table;
volatile uint32_t *const status = e->tx_status_table;
#ifdef LPC_ETH_CONFIG_USE_TRANSMIT_DMA
struct mbuf **const mbufs = e->tx_buf_table;
#else
char *const buf = e->tx_buf_table;
#endif
struct mbuf *m = NULL;
uint32_t const index_max = e->tx_unit_count - 1;
uint32_t produce_index = 0;
uint32_t consume_index = 0;
uint32_t ctrl = 0;
#ifndef LPC_ETH_CONFIG_USE_TRANSMIT_DMA
uint32_t frame_length = 0;
char *frame_buffer = NULL;
#endif
LPC_ETH_PRINTF("%s\n", __func__);
#ifndef LPC_ETH_CONFIG_USE_TRANSMIT_DMA
/* Initialize descriptor table */
for (produce_index = 0; produce_index <= index_max; ++produce_index) {
desc [produce_index].start =
(uint32_t) (buf + produce_index * LPC_ETH_CONFIG_TX_BUF_SIZE);
}
#endif
/* Main event loop */
while (true) {
/* Wait for events */
sc = rtems_bsdnet_event_receive(
LPC_ETH_EVENT_INITIALIZE
| LPC_ETH_EVENT_START
| LPC_ETH_EVENT_INTERRUPT,
RTEMS_EVENT_ANY | RTEMS_WAIT,
RTEMS_NO_TIMEOUT,
&events
);
RTEMS_CLEANUP_SC(sc, cleanup, "wait for events");
LPC_ETH_PRINTF("tx: wake up: 0x%08" PRIx32 "\n", events);
/* Initialize transmitter? */
if ((events & LPC_ETH_EVENT_INITIALIZE) != 0) {
/* Disable transmit interrupts */
lpc_eth_disable_transmit_interrupts();
/* Disable transmitter */
lpc_eth->command &= ~ETH_CMD_TX_ENABLE;
/* Wait for inactive status */
while ((lpc_eth->status & ETH_STAT_TX_ACTIVE) != 0) {
/* Wait */
}
/* Reset */
lpc_eth->command |= ETH_CMD_TX_RESET;
/* Clear transmit interrupts */
lpc_eth->intclear = LPC_ETH_INTERRUPT_TRANSMIT;
/* Transmit descriptors */
lpc_eth->txdescriptornum = index_max;
lpc_eth->txdescriptor = (uint32_t) desc;
lpc_eth->txstatus = (uint32_t) status;
#ifdef LPC_ETH_CONFIG_USE_TRANSMIT_DMA
/* Discard outstanding fragments (= data loss) */
for (produce_index = 0; produce_index <= index_max; ++produce_index) {
struct mbuf *victim = mbufs [produce_index];
if (victim != NULL) {
m_free(victim);
mbufs [produce_index] = NULL;
}
}
#endif
/* Initialize indices */
produce_index = lpc_eth->txproduceindex;
consume_index = lpc_eth->txconsumeindex;
#ifndef LPC_ETH_CONFIG_USE_TRANSMIT_DMA
/* Fresh frame length and buffer start */
frame_length = 0;
frame_buffer = (char *) desc [produce_index].start;
#endif
/* Enable transmitter */
lpc_eth->command |= ETH_CMD_TX_ENABLE;
}
/* Free consumed fragments */
while (true) {
/* Save last known consume index */
uint32_t c = consume_index;
/* Clear transmit interrupt status */
lpc_eth->intclear = LPC_ETH_INTERRUPT_TRANSMIT;
/* Get new consume index */
consume_index = lpc_eth->txconsumeindex;
/* Nothing consumed in the meantime? */
if (c == consume_index) {
break;
}
while (c != consume_index) {
uint32_t s = status [c];
/* Update error counters */
if ((s & (ETH_TX_STAT_ERROR | ETH_TX_STAT_NO_DESCRIPTOR)) != 0) {
if ((s & ETH_TX_STAT_UNDERRUN) != 0) {
++e->transmit_underrun_errors;
}
if ((s & ETH_TX_STAT_LATE_COLLISION) != 0) {
++e->transmit_late_collision_errors;
}
if ((s & ETH_TX_STAT_EXCESSIVE_COLLISION) != 0) {
++e->transmit_excessive_collision_errors;
}
if ((s & ETH_TX_STAT_EXCESSIVE_DEFER) != 0) {
++e->transmit_excessive_defer_errors;
}
if ((s & ETH_TX_STAT_NO_DESCRIPTOR) != 0) {
++e->transmit_no_descriptor_errors;
}
}
#ifdef LPC_ETH_CONFIG_USE_TRANSMIT_DMA
/* Release mbuf */
m_free(mbufs [c]);
mbufs [c] = NULL;
#endif
/* Next consume index */
c = lpc_eth_increment(c, index_max);
}
}
/* Transmit new fragments */
while (true) {
/* Compute next produce index */
uint32_t p = lpc_eth_increment(produce_index, index_max);
/* Get next fragment and control value */
m = lpc_eth_next_fragment(ifp, m, &ctrl);
/* Queue full? */
if (p == consume_index) {
LPC_ETH_PRINTF("tx: full queue: 0x%08x\n", m);
/* The queue is full, wait for transmit interrupt */
break;
}
/* New fragment? */
if (m != NULL) {
#ifdef LPC_ETH_CONFIG_USE_TRANSMIT_DMA
/* Set the transfer data */
rtems_cache_flush_multiple_data_lines(
mtod(m, const void *),
(size_t) m->m_len
);
desc [produce_index].start = mtod(m, uint32_t);
desc [produce_index].control = ctrl;
rtems_cache_flush_multiple_data_lines(
(void *) &desc [produce_index],
sizeof(desc [0])
);
mbufs [produce_index] = m;
LPC_ETH_PRINTF(
"tx: %02" PRIu32 ": %u %s\n",
produce_index, m->m_len,
(ctrl & ETH_TX_CTRL_LAST) != 0 ? "L" : ""
);
/* Next produce index */
produce_index = p;
/* Last fragment of a frame? */
if ((ctrl & ETH_TX_CTRL_LAST) != 0) {
/* Update the produce index */
lpc_eth->txproduceindex = produce_index;
/* Increment transmitted frames counter */
++e->transmitted_frames;
}
/* Next fragment of the frame */
m = m->m_next;
#else
size_t fragment_length = (size_t) m->m_len;
void *fragment_start = mtod(m, void *);
uint32_t new_frame_length = frame_length + fragment_length;
/* Check buffer size */
if (new_frame_length > LPC_ETH_CONFIG_TX_BUF_SIZE) {
LPC_ETH_PRINTF("tx: overflow\n");
/* Discard overflow data */
new_frame_length = LPC_ETH_CONFIG_TX_BUF_SIZE;
fragment_length = new_frame_length - frame_length;
/* Finalize frame */
ctrl |= LPC_ETH_LAST_FRAGMENT_FLAGS;
/* Update error counter */
++e->transmit_overflow_errors;
}
LPC_ETH_PRINTF(
"tx: copy: %" PRIu32 "%s%s\n",
fragment_length,
(m->m_flags & M_EXT) != 0 ? ", E" : "",
(m->m_flags & M_PKTHDR) != 0 ? ", H" : ""
);
/* Copy fragment to buffer in Ethernet RAM */
memcpy(frame_buffer, fragment_start, fragment_length);
if ((ctrl & ETH_TX_CTRL_LAST) != 0) {
/* Finalize descriptor */
desc [produce_index].control = (ctrl & ~ETH_TX_CTRL_SIZE_MASK)
| (new_frame_length - 1);
LPC_ETH_PRINTF(
"tx: %02" PRIu32 ": %" PRIu32 "\n",
produce_index,
new_frame_length
);
/* Cache flush of data */
rtems_cache_flush_multiple_data_lines(
(const void *) desc [produce_index].start,
new_frame_length
);
/* Cache flush of descriptor */
rtems_cache_flush_multiple_data_lines(
(void *) &desc [produce_index],
sizeof(desc [0])
);
/* Next produce index */
produce_index = p;
/* Update the produce index */
lpc_eth->txproduceindex = produce_index;
/* Fresh frame length and buffer start */
frame_length = 0;
frame_buffer = (char *) desc [produce_index].start;
/* Increment transmitted frames counter */
++e->transmitted_frames;
} else {
/* New frame length */
frame_length = new_frame_length;
/* Update current frame buffer start */
frame_buffer += fragment_length;
}
/* Free mbuf and get next */
m = m_free(m);
#endif
} else {
/* Nothing to transmit */
break;
}
}
/* No more fragments? */
if (m == NULL) {
/* Interface is now inactive */
ifp->if_flags &= ~IFF_OACTIVE;
} else {
LPC_ETH_PRINTF("tx: enable interrupts\n");
/* Enable transmit interrupts */
lpc_eth_enable_transmit_interrupts();
}
}
cleanup:
/* Clear task ID */
e->transmit_task = RTEMS_ID_NONE;
/* Release network semaphore */
rtems_bsdnet_semaphore_release();
/* Terminate self */
(void) rtems_task_delete(RTEMS_SELF);
}
static void lpc_eth_mdio_wait_for_not_busy(void)
{
while ((lpc_eth->mind & ETH_MIND_BUSY) != 0) {
rtems_task_wake_after(2);
}
}
static uint32_t lpc_eth_mdio_read_anlpar(void)
{
uint32_t madr = ETH_MADR_REG(MII_ANLPAR) | ETH_MADR_PHY(DEFAULT_PHY);
uint32_t anlpar = 0;
if (lpc_eth->madr != madr) {
lpc_eth->madr = madr;
}
if (lpc_eth->mcmd != ETH_MCMD_READ) {
lpc_eth->mcmd = 0;
lpc_eth->mcmd = ETH_MCMD_READ;
}
lpc_eth_mdio_wait_for_not_busy();
anlpar = lpc_eth->mrdd;
/* Start next read */
lpc_eth->mcmd = 0;
lpc_eth->mcmd = ETH_MCMD_READ;
return anlpar;
}
static int lpc_eth_mdio_read(
int phy __attribute__((unused)),
void *arg __attribute__((unused)),
unsigned reg,
uint32_t *val
)
{
int eno = 0;
if (phy == -1 || phy == 0) {
lpc_eth->madr = ETH_MADR_REG(reg) | ETH_MADR_PHY(DEFAULT_PHY);
lpc_eth->mcmd = 0;
lpc_eth->mcmd = ETH_MCMD_READ;
lpc_eth_mdio_wait_for_not_busy();
*val = lpc_eth->mrdd;
} else {
eno = EINVAL;
}
return eno;
}
static int lpc_eth_mdio_write(
int phy __attribute__((unused)),
void *arg __attribute__((unused)),
unsigned reg,
uint32_t val
)
{
int eno = 0;
if (phy == -1 || phy == 0) {
lpc_eth->madr = ETH_MADR_REG(reg) | ETH_MADR_PHY(DEFAULT_PHY);
lpc_eth->mwtd = val;
lpc_eth_mdio_wait_for_not_busy();
} else {
eno = EINVAL;
}
return eno;
}
static void lpc_eth_interface_init(void *arg)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
lpc_eth_driver_entry *e = (lpc_eth_driver_entry *) arg;
struct ifnet *ifp = &e->arpcom.ac_if;
LPC_ETH_PRINTF("%s\n", __func__);
if (e->state == LPC_ETH_INITIALIZED) {
lpc_eth_config_module_enable();
/* Soft reset */
/* Do soft reset */
lpc_eth->command = 0x38;
lpc_eth->mac1 = 0xcf00;
lpc_eth->mac1 = 0x0;
/* Initialize PHY */
lpc_eth->mcfg = ETH_MCFG_CLOCK_SELECT(0x7);
/* TODO */
/* Reinitialize registers */
lpc_eth->mac2 = 0x31;
lpc_eth->ipgt = 0x15;
lpc_eth->ipgr = 0x12;
lpc_eth->clrt = 0x370f;
lpc_eth->maxf = 0x0600;
lpc_eth->supp = ETH_SUPP_SPEED;
lpc_eth->test = 0;
#ifdef LPC_ETH_CONFIG_RMII
lpc_eth->command = 0x0600;
#else
lpc_eth->command = 0x0400;
#endif
lpc_eth->intenable = 0;
lpc_eth->intclear = 0x30ff;
lpc_eth->powerdown = 0;
/* MAC address */
lpc_eth->sa0 = ((uint32_t) e->arpcom.ac_enaddr [5] << 8)
| (uint32_t) e->arpcom.ac_enaddr [4];
lpc_eth->sa1 = ((uint32_t) e->arpcom.ac_enaddr [3] << 8)
| (uint32_t) e->arpcom.ac_enaddr [2];
lpc_eth->sa2 = ((uint32_t) e->arpcom.ac_enaddr [1] << 8)
| (uint32_t) e->arpcom.ac_enaddr [0];
/* Enable receiver */
lpc_eth->mac1 = 0x03;
/* Start receive task */
if (e->receive_task == RTEMS_ID_NONE) {
e->receive_task = rtems_bsdnet_newproc(
"ntrx",
4096,
lpc_eth_receive_task,
e
);
sc = rtems_event_send(e->receive_task, LPC_ETH_EVENT_INITIALIZE);
RTEMS_SYSLOG_ERROR_SC(sc, "send receive initialize event");
}
/* Start transmit task */
if (e->transmit_task == RTEMS_ID_NONE) {
e->transmit_task = rtems_bsdnet_newproc(
"nttx",
4096,
lpc_eth_transmit_task,
e
);
sc = rtems_event_send(e->transmit_task, LPC_ETH_EVENT_INITIALIZE);
RTEMS_SYSLOG_ERROR_SC(sc, "send transmit initialize event");
}
/* Change state */
if (
e->receive_task != RTEMS_ID_NONE && e->transmit_task != RTEMS_ID_NONE
) {
e->state = LPC_ETH_STARTED;
}
}
if (e->state == LPC_ETH_STARTED) {
/* Enable fatal interrupts */
lpc_eth->intenable = ETH_INT_RX_OVERRUN | ETH_INT_TX_UNDERRUN;
/* Enable promiscous mode */
lpc_eth_enable_promiscous_mode((ifp->if_flags & IFF_PROMISC) != 0);
/* Start watchdog timer */
ifp->if_timer = 1;
/* Set interface to running state */
ifp->if_flags |= IFF_RUNNING;
/* Change state */
e->state = LPC_ETH_RUNNING;
}
}
static void lpc_eth_interface_stats(lpc_eth_driver_entry *e)
{
int media = IFM_MAKEWORD(0, 0, 0, 0);
int eno = rtems_mii_ioctl(&e->mdio, e, SIOCGIFMEDIA, &media);
rtems_bsdnet_semaphore_release();
if (eno == 0) {
rtems_ifmedia2str(media, NULL, 0);
printf("\n");
}
printf("received frames: %u\n", e->received_frames);
printf("receive interrupts: %u\n", e->receive_interrupts);
printf("transmitted frames: %u\n", e->transmitted_frames);
printf("transmit interrupts: %u\n", e->transmit_interrupts);
printf("receive overrun errors: %u\n", e->receive_overrun_errors);
printf("receive fragment errors: %u\n", e->receive_fragment_errors);
printf("receive CRC errors: %u\n", e->receive_crc_errors);
printf("receive symbol errors: %u\n", e->receive_symbol_errors);
printf("receive length errors: %u\n", e->receive_length_errors);
printf("receive alignment errors: %u\n", e->receive_alignment_errors);
printf("receive no descriptor errors: %u\n", e->receive_no_descriptor_errors);
printf("receive fatal errors: %u\n", e->receive_fatal_errors);
printf("transmit underrun errors: %u\n", e->transmit_underrun_errors);
printf("transmit late collision errors: %u\n", e->transmit_late_collision_errors);
printf("transmit excessive collision errors: %u\n", e->transmit_excessive_collision_errors);
printf("transmit excessive defer errors: %u\n", e->transmit_excessive_defer_errors);
printf("transmit no descriptor errors: %u\n", e->transmit_no_descriptor_errors);
printf("transmit overflow errors: %u\n", e->transmit_overflow_errors);
printf("transmit fatal errors: %u\n", e->transmit_fatal_errors);
rtems_bsdnet_semaphore_obtain();
}
static int lpc_eth_multicast_control(
bool add,
struct ifreq *ifr,
struct arpcom *ac
)
{
int eno = 0;
if (add) {
eno = ether_addmulti(ifr, ac);
} else {
eno = ether_delmulti(ifr, ac);
}
if (eno == ENETRESET) {
struct ether_multistep step;
struct ether_multi *enm;
eno = 0;
lpc_eth->hashfilterl = 0;
lpc_eth->hashfilterh = 0;
ETHER_FIRST_MULTI(step, ac, enm);
while (enm != NULL) {
uint64_t addrlo = 0;
uint64_t addrhi = 0;
memcpy(&addrlo, enm->enm_addrlo, ETHER_ADDR_LEN);
memcpy(&addrhi, enm->enm_addrhi, ETHER_ADDR_LEN);
while (addrlo <= addrhi) {
/* XXX: ether_crc32_le() does not work, why? */
uint32_t crc = ether_crc32_be((uint8_t *) &addrlo, ETHER_ADDR_LEN);
uint32_t index = (crc >> 23) & 0x3f;
if (index < 32) {
lpc_eth->hashfilterl |= 1U << index;
} else {
lpc_eth->hashfilterh |= 1U << (index - 32);
}
++addrlo;
}
ETHER_NEXT_MULTI(step, enm);
}
}
return eno;
}
static int lpc_eth_interface_ioctl(
struct ifnet *ifp,
ioctl_command_t cmd,
caddr_t data
)
{
lpc_eth_driver_entry *e = (lpc_eth_driver_entry *) ifp->if_softc;
struct ifreq *ifr = (struct ifreq *) data;
int eno = 0;
LPC_ETH_PRINTF("%s\n", __func__);
switch (cmd) {
case SIOCGIFMEDIA:
case SIOCSIFMEDIA:
rtems_mii_ioctl(&e->mdio, e, cmd, (int *) data);
break;
case SIOCGIFADDR:
case SIOCSIFADDR:
ether_ioctl(ifp, cmd, data);
break;
case SIOCSIFFLAGS:
if (ifp->if_flags & IFF_RUNNING) {
/* TODO: off */
}
if (ifp->if_flags & IFF_UP) {
ifp->if_flags |= IFF_RUNNING;
/* TODO: init */
}
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
eno = lpc_eth_multicast_control(cmd == SIOCADDMULTI, ifr, &e->arpcom);
break;
case SIO_RTEMS_SHOW_STATS:
lpc_eth_interface_stats(e);
break;
default:
eno = EINVAL;
break;
}
return eno;
}
static void lpc_eth_interface_start(struct ifnet *ifp)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
lpc_eth_driver_entry *e = (lpc_eth_driver_entry *) ifp->if_softc;
ifp->if_flags |= IFF_OACTIVE;
sc = rtems_event_send(e->transmit_task, LPC_ETH_EVENT_START);
RTEMS_SYSLOG_ERROR_SC(sc, "send transmit start event");
}
static void lpc_eth_interface_watchdog(struct ifnet *ifp __attribute__((unused)))
{
lpc_eth_driver_entry *e = (lpc_eth_driver_entry *) ifp->if_softc;
uint32_t anlpar = lpc_eth_mdio_read_anlpar();
if (e->anlpar != anlpar) {
bool full_duplex = false;
bool speed = false;
e->anlpar = anlpar;
if ((anlpar & ANLPAR_TX_FD) != 0) {
full_duplex = true;
speed = true;
} else if ((anlpar & ANLPAR_T4) != 0) {
speed = true;
} else if ((anlpar & ANLPAR_TX) != 0) {
speed = true;
} else if ((anlpar & ANLPAR_10_FD) != 0) {
full_duplex = true;
}
if (full_duplex) {
lpc_eth->mac2 |= ETH_MAC2_FULL_DUPLEX;
} else {
lpc_eth->mac2 &= ~ETH_MAC2_FULL_DUPLEX;
}
if (speed) {
lpc_eth->supp |= ETH_SUPP_SPEED;
} else {
lpc_eth->supp &= ~ETH_SUPP_SPEED;
}
}
ifp->if_timer = WATCHDOG_TIMEOUT;
}
static unsigned lpc_eth_fixup_unit_count(int count, int default_value, int max)
{
if (count <= 0) {
count = default_value;
} else if (count > max) {
count = max;
}
return LPC_ETH_CONFIG_UNIT_MULTIPLE
+ (((unsigned) count - 1U) & ~(LPC_ETH_CONFIG_UNIT_MULTIPLE - 1U));
}
static int lpc_eth_attach(struct rtems_bsdnet_ifconfig *config)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
lpc_eth_driver_entry *e = &lpc_eth_driver_data;
struct ifnet *ifp = &e->arpcom.ac_if;
char *unit_name = NULL;
int unit_index = rtems_bsdnet_parse_driver_name(config, &unit_name);
size_t table_area_size = 0;
char *table_area = NULL;
char *table_location = NULL;
/* Check parameter */
if (unit_index < 0) {
RTEMS_SYSLOG_ERROR("parse error for interface name\n");
return 0;
}
if (unit_index != 0) {
RTEMS_DO_CLEANUP(cleanup, "unexpected unit number");
}
if (config->hardware_address == NULL) {
RTEMS_DO_CLEANUP(cleanup, "MAC address missing");
}
if (e->state != LPC_ETH_NOT_INITIALIZED) {
RTEMS_DO_CLEANUP(cleanup, "already attached");
}
/* MDIO */
e->mdio.mdio_r = lpc_eth_mdio_read;
e->mdio.mdio_w = lpc_eth_mdio_write;
e->mdio.has_gmii = 0;
e->anlpar = 0;
/* Interrupt number */
config->irno = LPC_ETH_CONFIG_INTERRUPT;
/* Device control */
config->drv_ctrl = e;
/* Receive unit count */
e->rx_unit_count = lpc_eth_fixup_unit_count(
config->rbuf_count,
LPC_ETH_CONFIG_RX_UNIT_COUNT_DEFAULT,
LPC_ETH_CONFIG_RX_UNIT_COUNT_MAX
);
config->rbuf_count = (int) e->rx_unit_count;
/* Transmit unit count */
e->tx_unit_count = lpc_eth_fixup_unit_count(
config->xbuf_count,
LPC_ETH_CONFIG_TX_UNIT_COUNT_DEFAULT,
LPC_ETH_CONFIG_TX_UNIT_COUNT_MAX
);
config->xbuf_count = (int) e->tx_unit_count;
/* Disable interrupts */
lpc_eth->intenable = 0;
/* Install interrupt handler */
sc = rtems_interrupt_handler_install(
config->irno,
"Ethernet",
RTEMS_INTERRUPT_UNIQUE,
lpc_eth_interrupt_handler,
e
);
RTEMS_CLEANUP_SC(sc, cleanup, "install interrupt handler");
/* Copy MAC address */
memcpy(e->arpcom.ac_enaddr, config->hardware_address, ETHER_ADDR_LEN);
/* Allocate and clear table area */
table_area_size =
e->rx_unit_count
* (sizeof(lpc_eth_transfer_descriptor)
+ sizeof(lpc_eth_receive_status)
+ sizeof(struct mbuf *))
+ e->tx_unit_count
* (sizeof(lpc_eth_transfer_descriptor)
+ sizeof(uint32_t)
+ LPC_ETH_CONFIG_TX_BUF_SIZE);
table_area = lpc_eth_config_alloc_table_area(table_area_size);
if (table_area == NULL) {
RTEMS_DO_CLEANUP(cleanup, "no memory for table area");
}
memset(table_area, 0, table_area_size);
table_location = table_area;
/*
* The receive status table must be the first one since it has the strictest
* alignment requirements.
*/
e->rx_status_table = (volatile lpc_eth_receive_status *) table_location;
table_location += e->rx_unit_count * sizeof(e->rx_status_table [0]);
e->rx_desc_table = (volatile lpc_eth_transfer_descriptor *) table_location;
table_location += e->rx_unit_count * sizeof(e->rx_desc_table [0]);
e->rx_mbuf_table = (struct mbuf **) table_location;
table_location += e->rx_unit_count * sizeof(e->rx_mbuf_table [0]);
e->tx_desc_table = (volatile lpc_eth_transfer_descriptor *) table_location;
table_location += e->tx_unit_count * sizeof(e->tx_desc_table [0]);
e->tx_status_table = (volatile uint32_t *) table_location;
table_location += e->tx_unit_count * sizeof(e->tx_status_table [0]);
e->tx_buf_table = table_location;
/* Set interface data */
ifp->if_softc = e;
ifp->if_unit = (short) unit_index;
ifp->if_name = unit_name;
ifp->if_mtu = (config->mtu > 0) ? (u_long) config->mtu : ETHERMTU;
ifp->if_init = lpc_eth_interface_init;
ifp->if_ioctl = lpc_eth_interface_ioctl;
ifp->if_start = lpc_eth_interface_start;
ifp->if_output = ether_output;
ifp->if_watchdog = lpc_eth_interface_watchdog;
ifp->if_flags = IFF_MULTICAST | IFF_BROADCAST | IFF_SIMPLEX;
ifp->if_snd.ifq_maxlen = ifqmaxlen;
ifp->if_timer = 0;
/* Change status */
e->state = LPC_ETH_INITIALIZED;
/* Attach the interface */
if_attach(ifp);
ether_ifattach(ifp);
return 1;
cleanup:
lpc_eth_config_free_table_area(table_area);
/* FIXME: Type */
free(unit_name, (int) 0xdeadbeef);
return 0;
}
static int lpc_eth_detach(
struct rtems_bsdnet_ifconfig *config __attribute__((unused))
)
{
/* FIXME: Detach the interface from the upper layers? */
/* Module soft reset */
lpc_eth->command = 0x38;
lpc_eth->mac1 = 0xcf00;
/* FIXME: More cleanup */
return 0;
}
int lpc_eth_attach_detach(
struct rtems_bsdnet_ifconfig *config,
int attaching
)
{
/* FIXME: Return value */
if (attaching) {
return lpc_eth_attach(config);
} else {
return lpc_eth_detach(config);
}
}
