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f004b2b8dc1fb78eb18b21ba6b50f6c712fd94f8
rtems/bsps/powerpc/mpc55xxevb/net/smsc9218i.c
Sebastian Huber f004b2b8dc Use rtems_task_exit() 
Update #3530.
Update #3533.
2018-10-02 10:22:15 +02:00

2125 lines
52 KiB
C
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/**
* @file
*
* @ingroup mpc55xx
*
* @brief SMSC - LAN9218i
*/
/*
* Copyright (c) 2009-2012 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.org/license/LICENSE.
*/
#include <rtems.h>
#include <mpc55xx/regs.h>
#if defined(RTEMS_NETWORKING) && defined(MPC55XX_HAS_SIU)
#include <machine/rtems-bsd-kernel-space.h>
#include <errno.h>
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <inttypes.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 <mpc55xx/edma.h>
#include <bsp.h>
#include <bsp/irq.h>
#include <bsp/utility.h>
#include <libcpu/powerpc-utility.h>
#include <bsp/smsc9218i.h>
#if MCLBYTES != 2048
#warning "unexpected MCLBYTES value"
#endif
#define ASSERT_SC(sc) assert((sc) == RTEMS_SUCCESSFUL)
#define SMSC9218I_EVENT_TX RTEMS_EVENT_1
#define SMSC9218I_EVENT_TX_START RTEMS_EVENT_2
#define SMSC9218I_EVENT_TX_ERROR RTEMS_EVENT_3
#define SMSC9218I_EVENT_RX RTEMS_EVENT_4
#define SMSC9218I_EVENT_RX_ERROR RTEMS_EVENT_5
#define SMSC9218I_EVENT_PHY RTEMS_EVENT_6
#define SMSC9218I_EVENT_DMA RTEMS_EVENT_7
#define SMSC9218I_EVENT_DMA_ERROR RTEMS_EVENT_8
/* Adjust by two bytes for proper IP header alignment */
#define SMSC9218I_RX_DATA_OFFSET 2
#define SMSC9218I_RX_JOBS 32
#define SMSC9218I_TX_JOBS 64
/* Maximum number of fragments per frame, see manual section 3.11.3.2 */
#define SMSC9218I_TX_FRAGMENT_MAX 86
#if SMSC9218I_TX_JOBS > SMSC9218I_TX_FRAGMENT_MAX
#error "too many TX jobs"
#endif
#define SMSC9218I_IRQ_CFG_GLOBAL_ENABLE \
(SMSC9218I_IRQ_CFG_IRQ_EN | SMSC9218I_IRQ_CFG_IRQ_TYPE)
#define SMSC9218I_IRQ_CFG_GLOBAL_DISABLE SMSC9218I_IRQ_CFG_IRQ_TYPE
#define SMSC9218I_EDMA_RX_TCD_CDF 0x10004
#define SMSC9218I_EDMA_RX_TCD_BMF 0x10003
#define SMSC9218I_TCD_BMF_LINK 0x10011
#define SMSC9218I_TCD_BMF_LAST 0x10003
#define SMSC9218I_TCD_BMF_CLEAR 0x10000
#define SMSC9218I_ERROR_INTERRUPTS \
(SMSC9218I_INT_TXSO \
| SMSC9218I_INT_RWT \
| SMSC9218I_INT_RXE \
| SMSC9218I_INT_TXE)
#define SMSC9218I_UNLIKELY(x) __builtin_expect((x), 0)
#ifdef DEBUG
#define SMSC9218I_PRINTF(...) printf(__VA_ARGS__)
#define SMSC9218I_PRINTK(...) printk(__VA_ARGS__)
#else
#define SMSC9218I_PRINTF(...)
#define SMSC9218I_PRINTK(...)
#endif
typedef enum {
SMSC9218I_NOT_INITIALIZED,
SMSC9218I_CONFIGURED,
SMSC9218I_STARTED,
SMSC9218I_RUNNING
} smsc9218i_state;
static const char *const state_to_string [] = {
"NOT INITIALIZED",
"CONFIGURED",
"STARTED",
"RUNNING"
};
typedef struct {
struct arpcom arpcom;
struct rtems_mdio_info mdio;
smsc9218i_state state;
rtems_id receive_task;
rtems_id transmit_task;
edma_channel_context edma_receive;
edma_channel_context edma_transmit;
unsigned phy_interrupts;
unsigned received_frames;
unsigned receiver_errors;
unsigned receive_interrupts;
unsigned receive_dma_interrupts;
unsigned receive_too_long_errors;
unsigned receive_collision_errors;
unsigned receive_crc_errors;
unsigned receive_dma_errors;
unsigned receive_drop;
unsigned receive_watchdog_timeouts;
unsigned transmitted_frames;
unsigned transmitter_errors;
unsigned transmit_interrupts;
unsigned transmit_dma_interrupts;
unsigned transmit_status_overflows;
unsigned transmit_frame_errors;
unsigned transmit_dma_errors;
} smsc9218i_driver_entry;
typedef struct {
uint32_t a;
uint32_t b;
} smsc9218i_transmit_command;
typedef struct {
struct tcd_t command_tcd_table [SMSC9218I_TX_JOBS];
struct tcd_t data_tcd_table [SMSC9218I_TX_JOBS];
smsc9218i_transmit_command command_table [SMSC9218I_TX_JOBS];
struct mbuf *fragment_table [SMSC9218I_TX_JOBS];
struct mbuf *frame;
struct mbuf *next_fragment;
int empty_index;
int transfer_index;
int transfer_last_index;
int todo_index;
int empty;
int transfer;
int todo;
uint32_t frame_length;
uint32_t command_b;
uint16_t tag;
bool done;
unsigned frame_compact_count;
} smsc9218i_transmit_job_control;
typedef struct {
struct tcd_t tcd_table [SMSC9218I_RX_JOBS];
struct mbuf *mbuf_table [SMSC9218I_RX_JOBS];
int consume;
int done;
int produce;
} smsc9218i_receive_job_control;
static smsc9218i_receive_job_control smsc_rx_jc __attribute__((aligned (32)));
static void smsc9218i_transmit_dma_done(
edma_channel_context *ctx,
uint32_t error_status
);
static void smsc9218i_receive_dma_done(
edma_channel_context *ctx,
uint32_t error_status
);
static smsc9218i_driver_entry smsc9218i_driver_data = {
.state = SMSC9218I_NOT_INITIALIZED,
.receive_task = RTEMS_ID_NONE,
.transmit_task = RTEMS_ID_NONE,
.edma_receive = {
.edma_tcd = EDMA_TCD_BY_CHANNEL_INDEX(SMSC9218I_EDMA_RX_CHANNEL),
.done = smsc9218i_receive_dma_done
},
.edma_transmit = {
.edma_tcd = EDMA_TCD_BY_CHANNEL_INDEX(SMSC9218I_EDMA_TX_CHANNEL),
.done = smsc9218i_transmit_dma_done
}
};
static rtems_interval smsc9218i_timeout_init(void)
{
return rtems_clock_get_ticks_since_boot();
}
static bool smsc9218i_timeout_not_expired(rtems_interval start)
{
rtems_interval elapsed = rtems_clock_get_ticks_since_boot() - start;
return elapsed < rtems_clock_get_ticks_per_second();
}
static bool smsc9218i_mac_wait(volatile smsc9218i_registers *regs)
{
rtems_interval start = smsc9218i_timeout_init();
bool busy;
while (
(busy = (regs->mac_csr_cmd & SMSC9218I_MAC_CSR_CMD_BUSY) != 0)
&& smsc9218i_timeout_not_expired(start)
) {
/* Wait */
}
return !busy;
}
static bool smsc9218i_mac_write(
volatile smsc9218i_registers *regs,
uint32_t address,
uint32_t data
)
{
bool ok = smsc9218i_mac_wait(regs);
if (ok) {
regs->mac_csr_data = SMSC9218I_SWAP(data);
regs->mac_csr_cmd = SMSC9218I_MAC_CSR_CMD_BUSY
| SMSC9218I_MAC_CSR_CMD_ADDR(address);
ok = smsc9218i_mac_wait(regs);
}
return ok;
}
static uint32_t smsc9218i_mac_read(
volatile smsc9218i_registers *regs,
uint32_t address,
bool *ok_ptr
)
{
uint32_t mac_csr_data = 0;
bool ok = smsc9218i_mac_wait(regs);
if (ok) {
regs->mac_csr_cmd = SMSC9218I_MAC_CSR_CMD_BUSY
| SMSC9218I_MAC_CSR_CMD_READ
| SMSC9218I_MAC_CSR_CMD_ADDR(address);
ok = smsc9218i_mac_wait(regs);
if (ok) {
mac_csr_data = regs->mac_csr_data;
}
}
if (ok_ptr != NULL) {
*ok_ptr = ok;
}
return SMSC9218I_SWAP(mac_csr_data);
}
static bool smsc9218i_phy_wait(volatile smsc9218i_registers *regs)
{
rtems_interval start = smsc9218i_timeout_init();
uint32_t mac_mii_acc;
bool busy;
do {
mac_mii_acc = smsc9218i_mac_read(regs, SMSC9218I_MAC_MII_ACC, NULL);
} while (
(busy = (mac_mii_acc & SMSC9218I_MAC_MII_ACC_BUSY) != 0)
&& smsc9218i_timeout_not_expired(start)
);
return !busy;
}
static bool smsc9218i_phy_write(
volatile smsc9218i_registers *regs,
uint32_t address,
uint32_t data
)
{
bool ok = smsc9218i_phy_wait(regs);
if (ok) {
ok = smsc9218i_mac_write(regs, SMSC9218I_MAC_MII_DATA, data);
if (ok) {
ok = smsc9218i_mac_write(
regs,
SMSC9218I_MAC_MII_ACC,
SMSC9218I_MAC_MII_ACC_PHY_DEFAULT
| SMSC9218I_MAC_MII_ACC_BUSY
| SMSC9218I_MAC_MII_ACC_WRITE
| SMSC9218I_MAC_MII_ACC_ADDR(address)
);
if (ok) {
ok = smsc9218i_phy_wait(regs);
}
}
}
return ok;
}
static uint32_t smsc9218i_phy_read(
volatile smsc9218i_registers *regs,
uint32_t address
)
{
smsc9218i_phy_wait(regs);
smsc9218i_mac_write(
regs,
SMSC9218I_MAC_MII_ACC,
SMSC9218I_MAC_MII_ACC_PHY_DEFAULT
| SMSC9218I_MAC_MII_ACC_BUSY
| SMSC9218I_MAC_MII_ACC_ADDR(address)
);
smsc9218i_phy_wait(regs);
return smsc9218i_mac_read(regs, SMSC9218I_MAC_MII_DATA, NULL);
}
static bool smsc9218i_enable_promiscous_mode(
volatile smsc9218i_registers *regs,
bool enable
)
{
bool ok;
uint32_t mac_cr = smsc9218i_mac_read(regs, SMSC9218I_MAC_CR, &ok);
if (ok) {
uint32_t flags = SMSC9218I_MAC_CR_RXALL | SMSC9218I_MAC_CR_PRMS;
if (enable) {
mac_cr |= flags;
} else {
mac_cr &= ~flags;
}
ok = smsc9218i_mac_write(regs, SMSC9218I_MAC_CR, mac_cr);
}
return ok;
}
#if defined(DEBUG)
static void smsc9218i_register_dump(volatile smsc9218i_registers *regs)
{
uint32_t reg = 0;
reg = regs->id_rev;
printf(
"id_rev: 0x%08" PRIx32 " (ID = 0x%04" PRIx32
", revision = 0x%04" PRIx32 ")\n",
SMSC9218I_SWAP(reg),
SMSC9218I_ID_REV_GET_ID(reg),
SMSC9218I_ID_REV_GET_REV(reg)
);
reg = regs->irq_cfg;
printf("irq_cfg: 0x%08" PRIx32 "\n", SMSC9218I_SWAP(reg));
reg = regs->int_sts;
printf("int_sts: 0x%08" PRIx32 "\n", SMSC9218I_SWAP(reg));
reg = regs->int_en;
printf("int_en: 0x%08" PRIx32 "\n", SMSC9218I_SWAP(reg));
reg = regs->byte_test;
printf("byte_test: 0x%08" PRIx32 "\n", SMSC9218I_SWAP(reg));
reg = regs->fifo_int;
printf("fifo_int: 0x%08" PRIx32 "\n", SMSC9218I_SWAP(reg));
reg = regs->rx_cfg;
printf("rx_cfg: 0x%08" PRIx32 "\n", SMSC9218I_SWAP(reg));
reg = regs->tx_cfg;
printf("tx_cfg: 0x%08" PRIx32 "\n", SMSC9218I_SWAP(reg));
reg = regs->hw_cfg;
printf("hw_cfg: 0x%08" PRIx32 "\n", SMSC9218I_SWAP(reg));
reg = regs->rx_dp_ctl;
printf("rx_dp_ctl: 0x%08" PRIx32 "\n", SMSC9218I_SWAP(reg));
reg = regs->rx_fifo_inf;
printf(
"rx_fifo_inf: 0x%08" PRIx32 " (status used = %" PRIu32
", data used = %" PRIu32 ")\n",
SMSC9218I_SWAP(reg),
SMSC9218I_RX_FIFO_INF_GET_SUSED(reg),
SMSC9218I_RX_FIFO_INF_GET_DUSED(reg)
);
reg = regs->tx_fifo_inf;
printf(
"tx_fifo_inf: 0x%08" PRIx32 " (status unused = %" PRIu32
", free = %" PRIu32 ")\n",
SMSC9218I_SWAP(reg),
SMSC9218I_TX_FIFO_INF_GET_SUSED(reg),
SMSC9218I_TX_FIFO_INF_GET_FREE(reg)
);
reg = regs->pmt_ctrl;
printf("pmt_ctrl: 0x%08" PRIx32 "\n", SMSC9218I_SWAP(reg));
reg = regs->gpio_cfg;
printf("gpio_cfg: 0x%08" PRIx32 "\n", SMSC9218I_SWAP(reg));
reg = regs->gpt_cfg;
printf("gpt_cfg: 0x%08" PRIx32 "\n", SMSC9218I_SWAP(reg));
reg = regs->gpt_cnt;
printf("gpt_cnt: 0x%08" PRIx32 "\n", SMSC9218I_SWAP(reg));
reg = regs->word_swap;
printf("word_swap: 0x%08" PRIx32 "\n", SMSC9218I_SWAP(reg));
reg = regs->free_run;
printf("free_run: 0x%08" PRIx32 "\n", SMSC9218I_SWAP(reg));
reg = regs->rx_drop;
printf("rx_drop: 0x%08" PRIx32 "\n", SMSC9218I_SWAP(reg));
reg = regs->afc_cfg;
printf("afc_cfg: 0x%08" PRIx32 "\n", SMSC9218I_SWAP(reg));
printf("mac: cr: 0x%08" PRIx32 "\n", smsc9218i_mac_read(regs, SMSC9218I_MAC_CR, NULL));
printf("mac: addrh: 0x%08" PRIx32 "\n", smsc9218i_mac_read(regs, SMSC9218I_MAC_ADDRH, NULL));
printf("mac: addrl: 0x%08" PRIx32 "\n", smsc9218i_mac_read(regs, SMSC9218I_MAC_ADDRL, NULL));
printf("mac: hashh: 0x%08" PRIx32 "\n", smsc9218i_mac_read(regs, SMSC9218I_MAC_HASHH, NULL));
printf("mac: hashl: 0x%08" PRIx32 "\n", smsc9218i_mac_read(regs, SMSC9218I_MAC_HASHL, NULL));
printf("mac: mii_acc: 0x%08" PRIx32 "\n", smsc9218i_mac_read(regs, SMSC9218I_MAC_MII_ACC, NULL));
printf("mac: mii_data: 0x%08" PRIx32 "\n", smsc9218i_mac_read(regs, SMSC9218I_MAC_MII_DATA, NULL));
printf("mac: flow: 0x%08" PRIx32 "\n", smsc9218i_mac_read(regs, SMSC9218I_MAC_FLOW, NULL));
printf("mac: vlan1: 0x%08" PRIx32 "\n", smsc9218i_mac_read(regs, SMSC9218I_MAC_VLAN1, NULL));
printf("mac: vlan2: 0x%08" PRIx32 "\n", smsc9218i_mac_read(regs, SMSC9218I_MAC_VLAN2, NULL));
printf("mac: wuff: 0x%08" PRIx32 "\n", smsc9218i_mac_read(regs, SMSC9218I_MAC_WUFF, NULL));
printf("mac: wucsr: 0x%08" PRIx32 "\n", smsc9218i_mac_read(regs, SMSC9218I_MAC_WUCSR, NULL));
printf("phy: bcr: 0x%08" PRIx32 "\n", smsc9218i_phy_read(regs, MII_BMCR));
printf("phy: bsr: 0x%08" PRIx32 "\n", smsc9218i_phy_read(regs, MII_BMSR));
printf("phy: id1: 0x%08" PRIx32 "\n", smsc9218i_phy_read(regs, MII_PHYIDR1));
printf("phy: id2: 0x%08" PRIx32 "\n", smsc9218i_phy_read(regs, MII_PHYIDR2));
printf("phy: anar: 0x%08" PRIx32 "\n", smsc9218i_phy_read(regs, MII_ANAR));
printf("phy: anlpar: 0x%08" PRIx32 "\n", smsc9218i_phy_read(regs, MII_ANLPAR));
printf("phy: anexpr: 0x%08" PRIx32 "\n", smsc9218i_phy_read(regs, MII_ANER));
printf("phy: mcsr: 0x%08" PRIx32 "\n", smsc9218i_phy_read(regs, SMSC9218I_PHY_MCSR));
printf("phy: spmodes: 0x%08" PRIx32 "\n", smsc9218i_phy_read(regs, SMSC9218I_PHY_SPMODES));
printf("phy: cisr: 0x%08" PRIx32 "\n", smsc9218i_phy_read(regs, SMSC9218I_PHY_CSIR));
printf("phy: isr: 0x%08" PRIx32 "\n", smsc9218i_phy_read(regs, SMSC9218I_PHY_ISR));
printf("phy: imr: 0x%08" PRIx32 "\n", smsc9218i_phy_read(regs, SMSC9218I_PHY_IMR));
printf("phy: physcsr: 0x%08" PRIx32 "\n", smsc9218i_phy_read(regs, SMSC9218I_PHY_PHYSCSR));
}
#endif
static void smsc9218i_flush_tcd(struct tcd_t *tcd)
{
ppc_data_cache_block_store(tcd);
}
static uint32_t smsc9218i_align_up(uint32_t val)
{
return 4U + ((val - 1U) & ~0x3U);
}
static void smsc9218i_discard_frame(
smsc9218i_driver_entry *e,
volatile smsc9218i_registers *regs,
uint32_t rx_fifo_status,
uint32_t frame_length,
uint32_t data_length
)
{
/* Update error counters */
if ((rx_fifo_status & SMSC9218I_RX_STS_ERROR_TOO_LONG) != 0) {
++e->receive_too_long_errors;
}
if ((rx_fifo_status & SMSC9218I_RX_STS_ERROR_COLLISION) != 0) {
++e->receive_collision_errors;
}
if ((rx_fifo_status & SMSC9218I_RX_STS_ERROR_CRC) != 0) {
++e->receive_crc_errors;
}
/* Discard frame */
if (frame_length > 16) {
/* Fast forward */
regs->rx_dp_ctl = SMSC9218I_RX_DP_CTRL_FFWD;
while ((regs->rx_dp_ctl & SMSC9218I_RX_DP_CTRL_FFWD) != 0) {
/* Wait */
}
} else {
uint32_t len = data_length / 4;
uint32_t i = 0;
/* Discard data */
for (i = 0; i < len; ++i) {
regs->rx_fifo_data;
}
}
}
static void smsc9218i_setup_receive_dma(
smsc9218i_driver_entry *e,
volatile smsc9218i_registers *regs,
smsc9218i_receive_job_control *jc
)
{
int c = jc->consume;
int p = jc->produce;
int np = (p + 1) % SMSC9218I_RX_JOBS;
struct tcd_t *first = &jc->tcd_table [p];
struct tcd_t *last = NULL;
while (np != c) {
uint32_t rx_fifo_inf = 0;
uint32_t status_used = 0;
/* Clear FIFO level status */
regs->int_sts = SMSC9218I_INT_RSFL;
/* Next FIFO status */
rx_fifo_inf = regs->rx_fifo_inf;
status_used = SMSC9218I_RX_FIFO_INF_GET_SUSED(rx_fifo_inf);
if (status_used > 0) {
uint32_t status = regs->rx_fifo_status;
uint32_t frame_length = SMSC9218I_RX_STS_GET_LENGTH(status);
uint32_t data_length = smsc9218i_align_up(
SMSC9218I_RX_DATA_OFFSET + frame_length
);
bool frame_ok = (status & SMSC9218I_RX_STS_ERROR) == 0;
if (frame_ok) {
struct mbuf *m = jc->mbuf_table [p];
int mbuf_length = (int) frame_length - ETHER_HDR_LEN - ETHER_CRC_LEN;
struct tcd_t *current = &jc->tcd_table [p];
m->m_len = mbuf_length;
m->m_pkthdr.len = mbuf_length;
current->NBYTES = data_length;
smsc9218i_flush_tcd(current);
last = current;
p = np;
np = (p + 1) % SMSC9218I_RX_JOBS;
} else {
smsc9218i_discard_frame(e, regs, status, frame_length, data_length);
}
} else {
break;
}
}
jc->produce = p;
if (last != NULL) {
volatile struct tcd_t *channel = e->edma_receive.edma_tcd;
/* Setup last TCD */
last->BMF.R = SMSC9218I_TCD_BMF_LAST;
smsc9218i_flush_tcd(last);
ppc_synchronize_data();
/* Start eDMA transfer */
channel->SADDR = first->SADDR;
channel->SDF.R = first->SDF.R;
channel->NBYTES = first->NBYTES;
channel->SLAST = first->SLAST;
channel->DADDR = first->DADDR;
channel->CDF.R = first->CDF.R;
channel->DLAST_SGA = first->DLAST_SGA;
channel->BMF.R = SMSC9218I_TCD_BMF_CLEAR;
channel->BMF.R = first->BMF.R;
}
}
static void smsc9218i_receive_dma_done(
edma_channel_context *ctx,
uint32_t error_status
)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
smsc9218i_driver_entry *e = &smsc9218i_driver_data;
smsc9218i_receive_job_control *jc = &smsc_rx_jc;
SMSC9218I_PRINTK(
"edma: id = 0x%08x, error status = 0x%08x\n",
channel_entry->id,
error_status
);
++e->receive_dma_interrupts;
if (SMSC9218I_UNLIKELY(error_status != 0)) {
++e->receive_dma_errors;
}
sc = rtems_bsdnet_event_send(e->receive_task, SMSC9218I_EVENT_DMA);
ASSERT_SC(sc);
jc->done = jc->produce;
}
static void smsc9218i_transmit_dma_done(
edma_channel_context *ctx,
uint32_t error_status
)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
smsc9218i_driver_entry *e = &smsc9218i_driver_data;
rtems_event_set event = error_status == 0 ?
SMSC9218I_EVENT_DMA : SMSC9218I_EVENT_DMA_ERROR;
SMSC9218I_PRINTK(
"edma: id = 0x%08x, error status = 0x%08x\n",
channel_entry->id,
error_status
);
++e->transmit_dma_interrupts;
sc = rtems_bsdnet_event_send(e->transmit_task, event);
ASSERT_SC(sc);
}
static void smsc9218i_interrupt_handler(void *arg)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
smsc9218i_driver_entry *e = (smsc9218i_driver_entry *) arg;
volatile smsc9218i_registers *const regs = smsc9218i;
uint32_t int_en = regs->int_en;
uint32_t int_sts = regs->int_sts & int_en;
#ifdef DEBUG
uint32_t irq_cfg = regs->irq_cfg;
#endif
/* Get interrupt status */
SMSC9218I_PRINTK(
"interrupt: irq_cfg = 0x%08x, int_sts = 0x%08x, int_en = 0x%08x\n",
SMSC9218I_SWAP(irq_cfg),
SMSC9218I_SWAP(int_sts),
SMSC9218I_SWAP(int_en)
);
/* Disable module interrupts */
regs->irq_cfg = SMSC9218I_IRQ_CFG_GLOBAL_DISABLE;
/* Clear external interrupt status */
SIU.EISR.R = 1;
/* Clear interrupts */
regs->int_sts = int_sts;
/* Error interrupts */
if (SMSC9218I_UNLIKELY((int_sts & SMSC9218I_ERROR_INTERRUPTS) != 0)) {
if ((int_sts & SMSC9218I_INT_TXSO) != 0) {
++e->transmit_status_overflows;
}
if ((int_sts & SMSC9218I_INT_RWT) != 0) {
++e->receive_watchdog_timeouts;
}
if ((int_sts & SMSC9218I_INT_RXE) != 0) {
++e->receiver_errors;
}
if ((int_sts & SMSC9218I_INT_TXE) != 0) {
++e->transmitter_errors;
}
}
/* Check receive interrupts */
if ((int_sts & SMSC9218I_INT_RSFL) != 0) {
int_en &= ~SMSC9218I_INT_RSFL;
++e->receive_interrupts;
sc = rtems_bsdnet_event_send(e->receive_task, SMSC9218I_EVENT_RX);
ASSERT_SC(sc);
}
/* Check PHY interrupts */
if (SMSC9218I_UNLIKELY((int_sts & SMSC9218I_INT_PHY) != 0)) {
SMSC9218I_PRINTK("interrupt: phy\n");
int_en &= ~SMSC9218I_INT_PHY;
++e->phy_interrupts;
sc = rtems_bsdnet_event_send(e->receive_task, SMSC9218I_EVENT_PHY);
ASSERT_SC(sc);
}
/* Check transmit interrupts */
if ((int_sts & SMSC9218I_INT_TDFA) != 0) {
SMSC9218I_PRINTK("interrupt: transmit\n");
int_en &= ~SMSC9218I_INT_TDFA;
++e->transmit_interrupts;
sc = rtems_bsdnet_event_send(e->transmit_task, SMSC9218I_EVENT_TX);
ASSERT_SC(sc);
}
/* Update interrupt enable */
regs->int_en = int_en;
/* Enable module interrupts */
regs->irq_cfg = SMSC9218I_IRQ_CFG_GLOBAL_ENABLE;
}
static void smsc9218i_enable_transmit_interrupts(
volatile smsc9218i_registers *regs
)
{
rtems_interrupt_level level;
rtems_interrupt_disable(level);
regs->int_en |= SMSC9218I_INT_TDFA;
rtems_interrupt_enable(level);
}
static void smsc9218i_enable_phy_interrupts(
volatile smsc9218i_registers *regs
)
{
rtems_interrupt_level level;
rtems_interrupt_disable(level);
regs->int_en |= SMSC9218I_INT_PHY;
rtems_interrupt_enable(level);
}
static void smsc9218i_phy_clear_interrupts(
volatile smsc9218i_registers *regs
)
{
smsc9218i_phy_read(regs, SMSC9218I_PHY_ISR);
}
static bool smsc9218i_media_status(smsc9218i_driver_entry *e, int *media)
{
struct ifnet *ifp = &e->arpcom.ac_if;
*media = IFM_MAKEWORD(0, 0, 0, SMSC9218I_MAC_MII_ACC_PHY_DEFAULT);
return (*ifp->if_ioctl)(ifp, SIOCGIFMEDIA, (caddr_t) media) == 0;
}
static void smsc9218i_media_status_change(
smsc9218i_driver_entry *e,
volatile smsc9218i_registers *regs
)
{
int media = 0;
bool media_ok = false;
uint32_t mac_cr = 0;
smsc9218i_phy_clear_interrupts(regs);
smsc9218i_enable_phy_interrupts(regs);
media_ok = smsc9218i_media_status(e, &media);
mac_cr = smsc9218i_mac_read(regs, SMSC9218I_MAC_CR, NULL);
if (media_ok && (IFM_OPTIONS(media) & IFM_FDX) == 0) {
mac_cr &= ~SMSC9218I_MAC_CR_FDPX;
} else {
mac_cr |= SMSC9218I_MAC_CR_FDPX;
}
smsc9218i_mac_write(regs, SMSC9218I_MAC_CR, mac_cr);
}
static bool smsc9218i_new_mbuf(
struct ifnet *ifp,
smsc9218i_receive_job_control *jc,
int i,
struct mbuf *old_m
)
{
bool ok = false;
int wait = old_m != NULL ? M_DONTWAIT : M_WAIT;
struct mbuf *new_m = m_gethdr(wait, MT_DATA);
struct tcd_t *tcd = &jc->tcd_table [i];
char *data = NULL;
if (new_m != NULL ) {
new_m->m_pkthdr.rcvif = ifp;
MCLGET(new_m, wait);
if ((new_m->m_flags & M_EXT) != 0) {
ok = true;
} else {
m_free(new_m);
new_m = old_m;
}
} else {
new_m = old_m;
}
data = mtod(new_m, char *);
new_m->m_data = data + SMSC9218I_RX_DATA_OFFSET + ETHER_HDR_LEN;
jc->mbuf_table [i] = new_m;
tcd->DADDR = (uint32_t) data;
tcd->BMF.R = SMSC9218I_TCD_BMF_LINK;
/* FIXME: This is maybe a problem in case of a lot of small frames */
rtems_cache_invalidate_multiple_data_lines(
data,
SMSC9218I_RX_DATA_OFFSET + ETHER_HDR_LEN + ETHERMTU + ETHER_CRC_LEN
);
return ok;
}
static void smsc9218i_init_receive_jobs(
smsc9218i_driver_entry *e,
volatile smsc9218i_registers *regs,
volatile smsc9218i_registers *regs_dma,
smsc9218i_receive_job_control *jc
)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
struct ifnet *ifp = &e->arpcom.ac_if;
int i = 0;
/* Obtain receive eDMA channel */
sc = mpc55xx_edma_obtain_channel(
&e->edma_receive,
MPC55XX_INTC_DEFAULT_PRIORITY
);
ASSERT_SC(sc);
for (i = 0; i < SMSC9218I_RX_JOBS; ++i) {
struct tcd_t *tcd = &jc->tcd_table [i];
struct tcd_t *next_tcd = &jc->tcd_table [(i + 1) % SMSC9218I_RX_JOBS];
tcd->SADDR = (uint32_t) &regs_dma->rx_fifo_data;
tcd->SDF.B.SSIZE = 0x2;
tcd->SDF.B.DSIZE = 0x2;
tcd->CDF.B.CITER = 1;
tcd->CDF.B.DOFF = 4;
tcd->DLAST_SGA = (int32_t) next_tcd;
smsc9218i_new_mbuf(ifp, jc, i, NULL);
}
}
static void smsc9218i_ether_input(
smsc9218i_driver_entry *e,
volatile smsc9218i_registers *regs,
smsc9218i_receive_job_control *jc
)
{
rtems_interrupt_level level;
struct ifnet *ifp = &e->arpcom.ac_if;
int c = jc->consume;
int d = jc->done;
while (c != d) {
struct mbuf *m = jc->mbuf_table [c];
struct ether_header *eh = (struct ether_header *)
(mtod(m, char *) - ETHER_HDR_LEN);
++e->received_frames;
if (smsc9218i_new_mbuf(ifp, jc, c, m)) {
ether_input(ifp, eh, m);
}
c = (c + 1) % SMSC9218I_RX_JOBS;
}
jc->consume = c;
rtems_interrupt_disable(level);
/* Enabling the receive interrupts while the DMA is active leads to chaos */
if (c == jc->produce) {
regs->int_en |= SMSC9218I_INT_RSFL;
}
rtems_interrupt_enable(level);
}
static void smsc9218i_receive_task(void *arg)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
rtems_interrupt_level level;
smsc9218i_receive_job_control *jc = &smsc_rx_jc;
smsc9218i_driver_entry *e = (smsc9218i_driver_entry *) arg;
volatile smsc9218i_registers *const regs = smsc9218i;
volatile smsc9218i_registers *const regs_dma = smsc9218i_dma;
uint32_t mac_cr = 0;
smsc9218i_init_receive_jobs(e, regs, regs_dma, jc);
/* Configure receiver */
regs->rx_cfg = SMSC9218I_RX_CFG_END_ALIGN_4
| SMSC9218I_RX_CFG_DOFF(SMSC9218I_RX_DATA_OFFSET);
/* Enable MAC receiver */
mac_cr = smsc9218i_mac_read(regs, SMSC9218I_MAC_CR, NULL);
mac_cr |= SMSC9218I_MAC_CR_RXEN;
smsc9218i_mac_write(regs, SMSC9218I_MAC_CR, mac_cr);
/* Enable receive interrupts */
rtems_interrupt_disable(level);
regs->int_en |= SMSC9218I_INT_RSFL;
rtems_interrupt_enable(level);
/* Enable PHY interrupts */
smsc9218i_phy_write(
regs,
SMSC9218I_PHY_IMR,
SMSC9218I_PHY_IMR_INT4 | SMSC9218I_PHY_IMR_INT6
);
smsc9218i_enable_phy_interrupts(regs);
while (true) {
rtems_event_set events;
sc = rtems_bsdnet_event_receive(
SMSC9218I_EVENT_DMA | SMSC9218I_EVENT_PHY | SMSC9218I_EVENT_RX,
RTEMS_EVENT_ANY | RTEMS_WAIT,
RTEMS_NO_TIMEOUT,
&events
);
ASSERT_SC(sc);
if ((events & (SMSC9218I_EVENT_RX | SMSC9218I_EVENT_DMA)) != 0) {
smsc9218i_setup_receive_dma(e, regs, jc);
}
if ((events & SMSC9218I_EVENT_DMA) != 0) {
smsc9218i_ether_input(e, regs, jc);
}
if ((events & SMSC9218I_EVENT_PHY) != 0) {
smsc9218i_media_status_change(e, regs);
}
}
}
#if defined(DEBUG)
static void smsc9218i_transmit_job_dump(
smsc9218i_transmit_job_control *jc,
const char *msg
)
{
char out [SMSC9218I_TX_JOBS + 1];
int c = 0;
int s = 0;
out [SMSC9218I_TX_JOBS] = '\0';
memset(out, '?', SMSC9218I_TX_JOBS);
c = jc->todo_index;
s = jc->empty;
while (s > 0) {
out [c] = 'E';
--s;
c = (c + 1) % SMSC9218I_TX_JOBS;
}
c = jc->transfer_index;
s = jc->todo;
while (s > 0) {
out [c] = 'T';
--s;
c = (c + 1) % SMSC9218I_TX_JOBS;
}
c = jc->empty_index;
s = jc->transfer;
while (s > 0) {
out [c] = 'D';
--s;
c = (c + 1) % SMSC9218I_TX_JOBS;
}
printf(
"tx: %s: %02u:%02u:%02u %s\n",
msg,
jc->empty,
jc->todo,
jc->transfer,
out
);
}
#endif /* defined(DEBUG) */
static struct mbuf *smsc9218i_compact_frame(
smsc9218i_transmit_job_control *jc,
uint32_t frame_length
)
{
struct mbuf *old_m = jc->frame;
struct mbuf *new_m = m_gethdr(M_WAIT, MT_DATA);
char *data = NULL;
++jc->frame_compact_count;
MCLGET(new_m, M_WAIT);
data = mtod(new_m, char *);
new_m->m_len = (int) frame_length;
new_m->m_pkthdr.len = (int) frame_length;
while (old_m != NULL) {
size_t len = (size_t) old_m->m_len;
memcpy(data, mtod(old_m, void *), len);
data += len;
old_m = m_free(old_m);
}
jc->frame = new_m;
return new_m;
}
static struct mbuf *smsc9218i_next_transmit_fragment(
struct ifnet *ifp,
smsc9218i_transmit_job_control *jc
)
{
struct mbuf *m = jc->next_fragment;
if (m != NULL) {
/* Next fragment is from the current frame */
jc->next_fragment = m->m_next;
} else {
/* Dequeue first fragment of the next frame */
IF_DEQUEUE(&ifp->if_snd, m);
/* Update frame head */
jc->frame = m;
if (m != NULL) {
struct mbuf *n = m;
struct mbuf *p = NULL;
uint32_t frame_length = 0;
unsigned fragments = 0;
bool tiny = false;
/* Calculate frame length and fragment number */
do {
int len = n->m_len;
if (len > 0) {
++fragments;
frame_length += (uint32_t) len;
tiny = tiny || len < 4;
/* Next fragment */
p = n;
n = n->m_next;
} else {
/* Discard empty fragment and get next */
n = m_free(n);
/* Remove fragment from list */
if (p != NULL) {
p->m_next = n;
} else {
jc->frame = n;
}
}
} while (n != NULL);
if (SMSC9218I_UNLIKELY(tiny || fragments > SMSC9218I_TX_JOBS)) {
fragments = 1;
m = smsc9218i_compact_frame(jc, frame_length);
}
/* Set frame length */
jc->frame_length = frame_length;
/* Update next fragment */
jc->next_fragment = jc->frame->m_next;
/* Update tag */
++jc->tag;
/* Command B */
jc->command_b = ((uint32_t) SMSC9218I_TX_B_TAG(jc->tag))
| SMSC9218I_TX_B_FRAME_LENGTH(jc->frame_length);
SMSC9218I_PRINTF(
"tx: next frame: tag = %i, frame length = %" PRIu32
", fragments = %u\n",
jc->tag,
frame_length,
fragments
);
} else {
/* The transmit queue is empty, we have no next fragment */
jc->next_fragment = NULL;
/* Interface is now inactive */
ifp->if_flags &= ~IFF_OACTIVE;
/* Transmit task may wait for events */
jc->done = true;
SMSC9218I_PRINTF("tx: inactive\n");
}
}
return m;
}
static void smsc9218i_transmit_create_jobs(
smsc9218i_transmit_job_control *jc,
volatile smsc9218i_registers *const regs,
struct ifnet *ifp
)
{
int n = jc->empty;
if (n > 0) {
int c = jc->todo_index;
int i = 0;
#ifdef DEBUG
smsc9218i_transmit_job_dump(jc, "create");
#endif
for (i = 0; i < n; ++i) {
struct mbuf *m = smsc9218i_next_transmit_fragment(ifp, jc);
if (m != NULL) {
uint32_t first = m == jc->frame ? SMSC9218I_TX_A_FIRST : 0;
uint32_t last = m->m_next == NULL ? SMSC9218I_TX_A_LAST : 0;
uint32_t fragment_length = (uint32_t) m->m_len;
uint32_t fragment_misalign = (uint32_t) (mtod(m, uintptr_t) % 4);
uint32_t data_length = fragment_misalign + fragment_length;
uint32_t data_misalign = data_length % 4;
uint32_t data = (uint32_t) (mtod(m, char *) - fragment_misalign);
/* Align data length on four byte boundary */
if (data_misalign > 0) {
data_length += 4 - data_misalign;
}
/* Cache flush for fragment data */
rtems_cache_flush_multiple_data_lines(
(const void *) data,
data_length
);
/* Remember fragement */
jc->fragment_table [c] = m;
/* Command A and B */
jc->command_table [c].a = SMSC9218I_TX_A_END_ALIGN_4
| SMSC9218I_TX_A_DOFF(fragment_misalign)
| SMSC9218I_TX_A_FRAGMENT_LENGTH(fragment_length)
| first
| last;
jc->command_table [c].b = jc->command_b;
/* Data TCD */
jc->data_tcd_table [c].SADDR = data;
jc->data_tcd_table [c].NBYTES = data_length;
SMSC9218I_PRINTF("tx: create: index = %u\n", c);
} else {
/* Nothing to do */
break;
}
c = (c + 1) % SMSC9218I_TX_JOBS;
}
/* Increment jobs to do */
jc->todo += i;
/* Decrement empty count */
jc->empty -= i;
/* Update todo index */
jc->todo_index = c;
#ifdef DEBUG
smsc9218i_transmit_job_dump(jc, "create done");
#endif
} else {
/* Transmit task may wait for events */
jc->done = true;
}
}
static void smsc9218i_transmit_do_jobs(
smsc9218i_transmit_job_control *jc,
volatile smsc9218i_registers *const regs,
smsc9218i_driver_entry *e
)
{
if (jc->transfer == 0) {
uint32_t tx_fifo_inf = regs->tx_fifo_inf;
uint32_t data_free = SMSC9218I_TX_FIFO_INF_GET_FREE(tx_fifo_inf);
int c = jc->transfer_index;
int last_index = c;
int i = 0;
int n = jc->todo;
#ifdef DEBUG
smsc9218i_transmit_job_dump(jc, "transfer");
#endif
for (i = 0; i < n; ++i) {
struct tcd_t *tcd = &jc->data_tcd_table [c];
uint32_t data_length = tcd->NBYTES + 14;
if (data_length <= data_free) {
/* Reduce free FIFO space */
data_free -= data_length;
/* Index of last TCD */
last_index = c;
/* Cache flush for data TCD */
smsc9218i_flush_tcd(tcd);
} else {
break;
}
c = (c + 1) % SMSC9218I_TX_JOBS;
}
if (i > 0) {
volatile struct tcd_t *channel = e->edma_transmit.edma_tcd;
struct tcd_t *start = &jc->command_tcd_table [jc->transfer_index];
struct tcd_t *last = &jc->data_tcd_table [last_index];
/* New transfer index */
jc->transfer_index = c;
/* New last transfer index */
jc->transfer_last_index = last_index;
/* Set jobs in transfer */
jc->transfer = i;
/* Decrement jobs to do */
jc->todo -= i;
/* Cache flush for command table */
rtems_cache_flush_multiple_data_lines(
jc->command_table,
sizeof(jc->command_table)
);
/* Enable interrupt for last data TCD */
last->BMF.R = SMSC9218I_TCD_BMF_LAST;
smsc9218i_flush_tcd(last);
ppc_synchronize_data();
/* Start eDMA transfer */
channel->SADDR = start->SADDR;
channel->SDF.R = start->SDF.R;
channel->NBYTES = start->NBYTES;
channel->SLAST = start->SLAST;
channel->DADDR = start->DADDR;
channel->CDF.R = start->CDF.R;
channel->DLAST_SGA = start->DLAST_SGA;
channel->BMF.R = SMSC9218I_TCD_BMF_CLEAR;
channel->BMF.R = start->BMF.R;
/* Transmit task may wait for events */
jc->done = true;
} else if (n > 0) {
/* We need to wait until the FIFO has more free space */
smsc9218i_enable_transmit_interrupts(regs);
/* Transmit task may wait for events */
jc->done = true;
}
#ifdef DEBUG
smsc9218i_transmit_job_dump(jc, "transfer done");
#endif
}
}
static void smsc9218i_transmit_finish_jobs(
smsc9218i_transmit_job_control *jc,
volatile smsc9218i_registers *const regs,
smsc9218i_driver_entry *e,
rtems_event_set events
)
{
uint32_t tx_fifo_inf = regs->tx_fifo_inf;
uint32_t status_used = SMSC9218I_TX_FIFO_INF_GET_SUSED(tx_fifo_inf);
uint32_t s = 0;
int n = jc->transfer;
for (s = 0; s < status_used; ++s) {
uint32_t tx_fifo_status = regs->tx_fifo_status;
if ((tx_fifo_status & SMSC9218I_TX_STS_ERROR) == 0) {
++e->transmitted_frames;
} else {
++e->transmit_frame_errors;
}
SMSC9218I_PRINTF(
"tx: transmit status: tag = %" PRIu32 ", status = 0x%08" PRIx32 "\n",
SMSC9218I_TX_STS_GET_TAG(tx_fifo_status),
SMSC9218I_SWAP(tx_fifo_status)
);
}
if (
(events & (SMSC9218I_EVENT_DMA | SMSC9218I_EVENT_DMA_ERROR)) != 0
&& n > 0
) {
int c = jc->empty_index;
int i = 0;
#ifdef DEBUG
smsc9218i_transmit_job_dump(jc, "finish");
#endif
if ((events & SMSC9218I_EVENT_DMA_ERROR) != 0) {
++e->transmit_dma_errors;
}
/* Restore last data TCD */
jc->data_tcd_table [jc->transfer_last_index].BMF.R =
SMSC9218I_TCD_BMF_LINK;
for (i = 0; i < n; ++i) {
/* Free fragment buffer */
m_free(jc->fragment_table [c]);
c = (c + 1) % SMSC9218I_TX_JOBS;
}
/* Increment empty count */
jc->empty += n;
/* New empty index */
jc->empty_index = jc->transfer_index;
/* Clear jobs in transfer */
jc->transfer = 0;
/* Update empty index */
jc->empty_index = c;
#ifdef DEBUG
smsc9218i_transmit_job_dump(jc, "finish done");
#endif
}
}
/* FIXME */
static smsc9218i_transmit_job_control smsc_tx_jc __attribute__((aligned (32))) = {
.frame = NULL,
.next_fragment = NULL,
.frame_length = 0,
.tag = 0,
.command_b = 0,
.done = false,
.empty_index = 0,
.transfer_index = 0,
.todo_index = 0,
.empty = SMSC9218I_TX_JOBS,
.transfer = 0,
.todo = 0
};
static void smsc9218i_transmit_task(void *arg)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
rtems_event_set events = 0;
smsc9218i_driver_entry *e = (smsc9218i_driver_entry *) arg;
struct ifnet *ifp = &e->arpcom.ac_if;
volatile smsc9218i_registers *const regs = smsc9218i;
volatile smsc9218i_registers *const regs_dma = smsc9218i_dma;
uint32_t mac_cr = 0;
smsc9218i_transmit_job_control *jc = &smsc_tx_jc;
unsigned i = 0;
SMSC9218I_PRINTF("%s\n", __func__);
/* Obtain transmit eDMA channel */
sc = mpc55xx_edma_obtain_channel(
&e->edma_transmit,
MPC55XX_INTC_DEFAULT_PRIORITY
);
ASSERT_SC(sc);
/* Setup transmit eDMA descriptors */
for (i = 0; i < SMSC9218I_TX_JOBS; ++i) {
unsigned ii = (i + 1) % SMSC9218I_TX_JOBS;
struct tcd_t tcd = EDMA_TCD_DEFAULT;
struct tcd_t *command_tcd = &jc->command_tcd_table [i];
struct tcd_t *data_tcd = &jc->data_tcd_table [i];
struct tcd_t *next_command_tcd = &jc->command_tcd_table [ii];
tcd.SDF.B.SSIZE = 2;
tcd.SDF.B.SOFF = 4;
tcd.SDF.B.DSIZE = 2;
tcd.CDF.B.CITER = 1;
tcd.BMF.R = SMSC9218I_TCD_BMF_LINK;
tcd.DADDR = (uint32_t) &regs_dma->tx_fifo_data;
tcd.DLAST_SGA = (int32_t) next_command_tcd;
*data_tcd = tcd;
tcd.DADDR = (uint32_t) &regs->tx_fifo_data;
tcd.SADDR = (uint32_t) &jc->command_table [i].a;
tcd.NBYTES = 8;
tcd.DLAST_SGA = (int32_t) data_tcd;
*command_tcd = tcd;
}
/*
* Cache flush for command TCD. The content of the command TCD remains
* invariant.
*/
rtems_cache_flush_multiple_data_lines(
jc->command_tcd_table,
sizeof(jc->command_tcd_table)
);
/* Configure transmitter */
regs->tx_cfg = SMSC9218I_TX_CFG_SAO | SMSC9218I_TX_CFG_ON;
/* Enable MAC transmitter */
mac_cr = smsc9218i_mac_read(regs, SMSC9218I_MAC_CR, NULL) | SMSC9218I_MAC_CR_TXEN;
smsc9218i_mac_write(regs, SMSC9218I_MAC_CR, mac_cr);
/* Main event loop */
while (true) {
/* Wait for events */
sc = rtems_bsdnet_event_receive(
SMSC9218I_EVENT_TX
| SMSC9218I_EVENT_TX_START
| SMSC9218I_EVENT_DMA
| SMSC9218I_EVENT_DMA_ERROR,
RTEMS_EVENT_ANY | RTEMS_WAIT,
RTEMS_NO_TIMEOUT,
&events
);
ASSERT_SC(sc);
SMSC9218I_PRINTF("tx: wake up: events = 0x%08" PRIx32 "\n", events);
do {
jc->done = false;
smsc9218i_transmit_finish_jobs(jc, regs, e, events);
smsc9218i_transmit_create_jobs(jc, regs, ifp);
smsc9218i_transmit_do_jobs(jc, regs, e);
} while (!jc->done);
SMSC9218I_PRINTF("tx: done\n");
}
/* Release network semaphore */
rtems_bsdnet_semaphore_release();
/* Terminate self */
rtems_task_exit();
}
#if defined(DEBUG)
static void smsc9218i_test_macros(void)
{
unsigned i = 0;
unsigned byte_test = 0x87654321U;
unsigned val8 = 0xa5;
unsigned val16 = 0xa55a;
int r = 0;
r = SMSC9218I_SWAP(SMSC9218I_BYTE_TEST) == byte_test;
printf("[%i] SMSC9218I_SWAP\n", r);
for (i = 0; i < 32; ++i) {
r = SMSC9218I_SWAP(SMSC9218I_FLAG(i)) == (1U << i);
printf("[%i] flag: %u\n", r, i);
}
for (i = 0; i < 32; i += 8) {
r = SMSC9218I_SWAP(SMSC9218I_FIELD_8(val8, i)) == (val8 << i);
printf("[%i] field 8: %u\n", r, i);
}
for (i = 0; i < 32; i += 16) {
r = SMSC9218I_SWAP(SMSC9218I_FIELD_16(val16, i)) == (val16 << i);
printf("[%i] field 16: %u\n", r, i);
}
for (i = 0; i < 32; i += 8) {
r = SMSC9218I_GET_FIELD_8(SMSC9218I_BYTE_TEST, i)
== ((byte_test >> i) & 0xffU);
printf("[%i] get field 8: %u\n", r, i);
}
for (i = 0; i < 32; i += 16) {
r = SMSC9218I_GET_FIELD_16(SMSC9218I_BYTE_TEST, i)
== ((byte_test >> i) & 0xffffU);
printf("[%i] get field 16: %u\n", r, i);
}
}
#endif
static bool smsc9218i_wait_for_eeprom_access(
volatile smsc9218i_registers *regs
)
{
rtems_interval start = smsc9218i_timeout_init();
bool busy;
while (
(busy = (regs->e2p_cmd & SMSC9218I_E2P_CMD_EPC_BUSY) != 0)
&& smsc9218i_timeout_not_expired(start)
) {
/* Wait */
}
return !busy;
}
static bool smsc9218i_get_mac_address(
volatile smsc9218i_registers *regs,
uint8_t address [6]
)
{
bool ok = false;
uint32_t low = smsc9218i_mac_read(regs, SMSC9218I_MAC_ADDRL, &ok);
address [0] = (uint8_t) low;
address [1] = (uint8_t) (low >> 8) & 0xff;
address [2] = (uint8_t) (low >> 16);
address [3] = (uint8_t) (low >> 24);
if (ok) {
uint32_t high = smsc9218i_mac_read(regs, SMSC9218I_MAC_ADDRH, &ok);
address [4] = (uint8_t) high;
address [5] = (uint8_t) (high >> 8);
}
return ok;
}
static bool smsc9218i_set_mac_address(
volatile smsc9218i_registers *regs,
const uint8_t address [6]
)
{
bool ok = smsc9218i_mac_write(
regs,
SMSC9218I_MAC_ADDRL,
((uint32_t) address [3] << 24) | ((uint32_t) address [2] << 16)
| ((uint32_t) address [1] << 8) | (uint32_t) address [0]
);
if (ok) {
ok = smsc9218i_mac_write(
regs,
SMSC9218I_MAC_ADDRH,
((uint32_t) address [5] << 8) | (uint32_t) address [4]
);
}
return ok;
}
/* Sometimes the write of the MAC address was not reliable */
static bool smsc9218i_set_and_verify_mac_address(
volatile smsc9218i_registers *regs,
const uint8_t address [6]
)
{
bool ok = true;
int i;
for (i = 0; ok && i < 3; ++i) {
ok = smsc9218i_set_mac_address(regs, address);
if (ok) {
uint8_t actual_address [6];
ok = smsc9218i_get_mac_address(regs, actual_address)
&& memcmp(address, actual_address, sizeof(actual_address)) == 0;
}
}
return ok;
}
#if defined(DEBUG)
static void smsc9218i_mac_address_dump(volatile smsc9218i_registers *regs)
{
uint8_t mac_address [6];
bool ok = smsc9218i_get_mac_address(regs, mac_address);
if (ok) {
printf(
"MAC address: %02x:%02x:%02x:%02x:%02x:%02x\n",
mac_address [0],
mac_address [1],
mac_address [2],
mac_address [3],
mac_address [4],
mac_address [5]
);
} else {
printf("cannot read MAC address\n");
}
}
#endif
static void smsc9218i_interrupt_init(
smsc9218i_driver_entry *e,
volatile smsc9218i_registers *regs
)
{
#ifdef SMSC9218I_IRQ_PIN
rtems_status_code sc = RTEMS_SUCCESSFUL;
union SIU_PCR_tag pcr = MPC55XX_ZERO_FLAGS;
union SIU_DIRER_tag direr = MPC55XX_ZERO_FLAGS;
union SIU_DIRSR_tag dirsr = MPC55XX_ZERO_FLAGS;
union SIU_ORER_tag orer = MPC55XX_ZERO_FLAGS;
union SIU_IREER_tag ireer = MPC55XX_ZERO_FLAGS;
union SIU_IFEER_tag ifeer = MPC55XX_ZERO_FLAGS;
union SIU_IDFR_tag idfr = MPC55XX_ZERO_FLAGS;
rtems_interrupt_level level;
/* Configure IRQ input pin */
pcr.B.PA = 2;
pcr.B.OBE = 0;
pcr.B.IBE = 1;
#if MPC55XX_CHIP_FAMILY != 551
pcr.B.DSC = 0;
#endif
pcr.B.ODE = 0;
pcr.B.HYS = 0;
pcr.B.SRC = 0;
pcr.B.WPE = 0;
pcr.B.WPS = 1;
SIU.PCR [SMSC9218I_IRQ_PIN].R = pcr.R;
/* DMA/Interrupt Request Select */
rtems_interrupt_disable(level);
dirsr.R = SIU.DIRSR.R;
#if MPC55XX_CHIP_FAMILY != 551
dirsr.B.DIRS0 = 0;
#endif
SIU.DIRSR.R = dirsr.R;
rtems_interrupt_enable(level);
/* Overrun Request Enable */
rtems_interrupt_disable(level);
orer.R = SIU.ORER.R;
orer.B.ORE0 = 0;
SIU.ORER.R = orer.R;
rtems_interrupt_enable(level);
/* IRQ Rising-Edge Enable */
rtems_interrupt_disable(level);
ireer.R = SIU.IREER.R;
ireer.B.IREE0 = 0;
SIU.IREER.R = ireer.R;
rtems_interrupt_enable(level);
/* IRQ Falling-Edge Enable */
rtems_interrupt_disable(level);
ifeer.R = SIU.IFEER.R;
ifeer.B.IFEE0 = 1;
SIU.IFEER.R = ifeer.R;
rtems_interrupt_enable(level);
/* IRQ Digital Filter */
rtems_interrupt_disable(level);
idfr.R = SIU.IDFR.R;
idfr.B.DFL = 0;
SIU.IDFR.R = idfr.R;
rtems_interrupt_enable(level);
/* Clear external interrupt status */
SIU.EISR.R = 1;
/* DMA/Interrupt Request Enable */
rtems_interrupt_disable(level);
direr.R = SIU.DIRER.R;
direr.B.EIRE0 = 1;
SIU.DIRER.R = direr.R;
rtems_interrupt_enable(level);
/* Install interrupt handler */
sc = rtems_interrupt_handler_install(
MPC55XX_IRQ_SIU_EXTERNAL_0,
"SMSC9218i",
RTEMS_INTERRUPT_UNIQUE,
smsc9218i_interrupt_handler,
e
);
ASSERT_SC(sc);
/* Enable interrupts and use push-pull driver (active low) */
regs->irq_cfg = SMSC9218I_IRQ_CFG_GLOBAL_ENABLE;
/* Enable error interrupts */
regs->int_en = SMSC9218I_ERROR_INTERRUPTS;
#endif
}
static void smsc9218i_reset_signal(bool signal)
{
#ifdef SMSC9218I_RESET_PIN
SIU.GPDO [SMSC9218I_RESET_PIN].R = signal ? 1 : 0;
#endif
}
static void smsc9218i_reset_signal_init(void)
{
#ifdef SMSC9218I_RESET_PIN
union SIU_PCR_tag pcr = MPC55XX_ZERO_FLAGS;
smsc9218i_reset_signal(true);
pcr.B.PA = 0;
pcr.B.OBE = 1;
pcr.B.IBE = 0;
#if MPC55XX_CHIP_FAMILY != 551
pcr.B.DSC = 0;
#endif
pcr.B.ODE = 0;
pcr.B.HYS = 0;
pcr.B.SRC = 0;
pcr.B.WPE = 1;
pcr.B.WPS = 1;
SIU.PCR [SMSC9218I_RESET_PIN].R = pcr.R;
#endif
}
static bool smsc9218i_hardware_reset(volatile smsc9218i_registers *regs)
{
rtems_interval start = smsc9218i_timeout_init();
bool not_ready;
smsc9218i_reset_signal_init();
smsc9218i_reset_signal(false);
rtems_bsp_delay(200);
smsc9218i_reset_signal(true);
while (
(not_ready = (regs->pmt_ctrl & SMSC9218I_PMT_CTRL_READY) == 0)
&& smsc9218i_timeout_not_expired(start)
) {
/* Wait */
}
return !not_ready;
}
static void smsc9218i_interface_init(void *arg)
{
smsc9218i_driver_entry *e = (smsc9218i_driver_entry *) arg;
struct ifnet *ifp = &e->arpcom.ac_if;
volatile smsc9218i_registers *const regs = smsc9218i;
bool ok = true;
SMSC9218I_PRINTF("%s\n", __func__);
if (e->state == SMSC9218I_CONFIGURED) {
ok = smsc9218i_hardware_reset(regs);
if (ok) {
e->state = SMSC9218I_NOT_INITIALIZED;
}
}
if (e->state == SMSC9218I_NOT_INITIALIZED) {
#if defined(DEBUG)
smsc9218i_register_dump(regs);
#endif
/* Set hardware configuration */
regs->hw_cfg = SMSC9218I_HW_CFG_MBO | SMSC9218I_HW_CFG_TX_FIF_SZ(5);
ok = smsc9218i_wait_for_eeprom_access(regs);
if (ok) {
ok = smsc9218i_set_and_verify_mac_address(regs, e->arpcom.ac_enaddr);
if (ok) {
#if defined(DEBUG)
smsc9218i_mac_address_dump(regs);
#endif
/* Auto-negotiation advertisment */
ok = smsc9218i_phy_write(
regs,
MII_ANAR,
ANAR_TX_FD | ANAR_TX | ANAR_10_FD | ANAR_10 | ANAR_CSMA
);
if (ok) {
#ifdef SMSC9218I_ENABLE_LED_OUTPUTS
regs->gpio_cfg = SMSC9218I_HW_CFG_LED_1
| SMSC9218I_HW_CFG_LED_2
| SMSC9218I_HW_CFG_LED_3;
#endif
smsc9218i_interrupt_init(e, regs);
/* Set MAC control */
ok = smsc9218i_mac_write(regs, SMSC9218I_MAC_CR, SMSC9218I_MAC_CR_FDPX);
if (ok) {
/* Set FIFO interrupts */
regs->fifo_int = SMSC9218I_FIFO_INT_TDAL(32);
/* Clear receive drop counter */
regs->rx_drop;
/* Start receive task */
if (e->receive_task == RTEMS_ID_NONE) {
e->receive_task = rtems_bsdnet_newproc(
"ntrx",
4096,
smsc9218i_receive_task,
e
);
}
/* Start transmit task */
if (e->transmit_task == RTEMS_ID_NONE) {
e->transmit_task = rtems_bsdnet_newproc(
"nttx",
4096,
smsc9218i_transmit_task,
e
);
}
/* Change state */
if (e->receive_task != RTEMS_ID_NONE
&& e->transmit_task != RTEMS_ID_NONE) {
e->state = SMSC9218I_STARTED;
}
}
}
}
}
}
if (e->state == SMSC9218I_STARTED) {
/* Enable promiscous mode */
ok = smsc9218i_enable_promiscous_mode(
regs,
(ifp->if_flags & IFF_PROMISC) != 0
);
if (ok) {
/* Set interface to running state */
ifp->if_flags |= IFF_RUNNING;
/* Change state */
e->state = SMSC9218I_RUNNING;
}
}
}
static int smsc9218i_mdio_read(
int phy,
void *arg,
unsigned phy_reg,
uint32_t *val
)
{
volatile smsc9218i_registers *const regs = smsc9218i;
*val = smsc9218i_phy_read(regs, phy_reg);
return 0;
}
static int smsc9218i_mdio_write(
int phy,
void *arg,
unsigned phy_reg,
uint32_t data
)
{
volatile smsc9218i_registers *const regs = smsc9218i;
smsc9218i_phy_write(regs, phy_reg, data);
return 0;
}
static void smsc9218i_interface_stats(smsc9218i_driver_entry *e)
{
volatile smsc9218i_registers *const regs = smsc9218i;
smsc9218i_transmit_job_control *jc = &smsc_tx_jc;
int media = 0;
bool media_ok = smsc9218i_media_status(e, &media);
if (media_ok) {
rtems_ifmedia2str(media, NULL, 0);
printf ("\n");
} else {
printf ("PHY communication error\n");
}
e->receive_drop += SMSC9218I_SWAP(regs->rx_drop);
printf("PHY interrupts: %u\n", e->phy_interrupts);
printf("received frames: %u\n", e->received_frames);
printf("receiver errors: %u\n", e->receiver_errors);
printf("receive interrupts: %u\n", e->receive_interrupts);
printf("receive DMA interrupts: %u\n", e->receive_dma_interrupts);
printf("receive to long errors: %u\n", e->receive_too_long_errors);
printf("receive collision errors: %u\n", e->receive_collision_errors);
printf("receive CRC errors: %u\n", e->receive_crc_errors);
printf("receive DMA errors: %u\n", e->receive_dma_errors);
printf("receive drops: %u\n", e->receive_drop);
printf("receive watchdog timeouts: %u\n", e->receive_watchdog_timeouts);
printf("transmitted frames: %u\n", e->transmitted_frames);
printf("transmitter errors: %u\n", e->transmitter_errors);
printf("transmit interrupts: %u\n", e->transmit_interrupts);
printf("transmit DMA interrupts: %u\n", e->transmit_dma_interrupts);
printf("transmit status overflows: %u\n", e->transmit_status_overflows);
printf("transmit frame errors: %u\n", e->transmit_frame_errors);
printf("transmit DMA errors: %u\n", e->transmit_dma_errors);
printf("frame compact count: %u\n", jc->frame_compact_count);
printf("interface state: %s\n", state_to_string [e->state]);
}
static void smsc9218i_interface_off(struct ifnet *ifp)
{
smsc9218i_driver_entry *e = (smsc9218i_driver_entry *) ifp->if_softc;
rtems_status_code sc = RTEMS_SUCCESSFUL;
sc = rtems_task_suspend(e->receive_task);
ASSERT_SC(sc);
sc = rtems_task_suspend(e->transmit_task);
ASSERT_SC(sc);
/* remove interrupt handler */
sc = rtems_interrupt_handler_remove(
MPC55XX_IRQ_SIU_EXTERNAL_0,
smsc9218i_interrupt_handler,
e
);
ASSERT_SC(sc);
mpc55xx_edma_release_channel(
&e->edma_receive
);
mpc55xx_edma_release_channel(
&e->edma_transmit
);
/* set in reset state */
smsc9218i_reset_signal(false);
}
static int smsc9218i_interface_ioctl(
struct ifnet *ifp,
ioctl_command_t command,
caddr_t data
) {
smsc9218i_driver_entry *e = (smsc9218i_driver_entry *) ifp->if_softc;
int rv = 0;
SMSC9218I_PRINTF("%s\n", __func__);
switch (command) {
case SIOCGIFMEDIA:
case SIOCSIFMEDIA:
rtems_mii_ioctl(&e->mdio, e, command, (int *) data);
break;
case SIOCGIFADDR:
case SIOCSIFADDR:
ether_ioctl(ifp, command, data);
break;
case SIOCSIFFLAGS:
if (ifp->if_flags & IFF_UP) {
/* TODO: init */
} else {
smsc9218i_interface_off(ifp);
}
break;
case SIO_RTEMS_SHOW_STATS:
smsc9218i_interface_stats(e);
break;
default:
rv = EINVAL;
break;
}
return rv;
}
static void smsc9218i_interface_start(struct ifnet *ifp)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
smsc9218i_driver_entry *e = (smsc9218i_driver_entry *) ifp->if_softc;
/* Interface is now active */
ifp->if_flags |= IFF_OACTIVE;
sc = rtems_bsdnet_event_send(e->transmit_task, SMSC9218I_EVENT_TX_START);
ASSERT_SC(sc);
}
static void smsc9218i_interface_watchdog(struct ifnet *ifp)
{
SMSC9218I_PRINTF("%s\n", __func__);
}
static void smsc9218i_attach(struct rtems_bsdnet_ifconfig *config)
{
smsc9218i_driver_entry *e = &smsc9218i_driver_data;
struct ifnet *ifp = &e->arpcom.ac_if;
char *unit_name = NULL;
int unit_number = rtems_bsdnet_parse_driver_name(config, &unit_name);
/* Check parameter */
assert(unit_number == 0);
assert(config->hardware_address != NULL);
assert(e->state == SMSC9218I_NOT_INITIALIZED);
/* Interrupt number */
config->irno = MPC55XX_IRQ_SIU_EXTERNAL_0;
/* Device control */
config->drv_ctrl = e;
/* Receive unit number */
config->rbuf_count = 0;
/* Transmit unit number */
config->xbuf_count = 0;
/* Copy MAC address */
memcpy(e->arpcom.ac_enaddr, config->hardware_address, ETHER_ADDR_LEN);
/* Set interface data */
ifp->if_softc = e;
ifp->if_unit = (short) unit_number;
ifp->if_name = unit_name;
ifp->if_mtu = config->mtu > 0 ? (u_long) config->mtu : ETHERMTU;
ifp->if_init = smsc9218i_interface_init;
ifp->if_ioctl = smsc9218i_interface_ioctl;
ifp->if_start = smsc9218i_interface_start;
ifp->if_output = ether_output;
ifp->if_watchdog = smsc9218i_interface_watchdog;
ifp->if_flags = config->ignore_broadcast ? 0 : IFF_BROADCAST;
ifp->if_snd.ifq_maxlen = ifqmaxlen;
ifp->if_timer = 0;
/* MDIO */
e->mdio.mdio_r = smsc9218i_mdio_read;
e->mdio.mdio_w = smsc9218i_mdio_write;
/* Change status */
e->state = SMSC9218I_CONFIGURED;
/* Attach the interface */
if_attach(ifp);
ether_ifattach(ifp);
}
int smsc9218i_attach_detach(
struct rtems_bsdnet_ifconfig *config,
int attaching
) {
if (attaching) {
smsc9218i_attach(config);
} else {
/* TODO */
}
/* FIXME: Return value */
return 0;
}
#endif /* defined(RTEMS_NETWORKING) && defined(MPC55XX_HAS_SIU) */
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