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uboot-mt623x/cpu/ppc4xx/405gp_enet.c

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/*-----------------------------------------------------------------------------+
*
* This source code has been made available to you by IBM on an AS-IS
* basis. Anyone receiving this source is licensed under IBM
* copyrights to use it in any way he or she deems fit, including
* copying it, modifying it, compiling it, and redistributing it either
* with or without modifications. No license under IBM patents or
* patent applications is to be implied by the copyright license.
*
* Any user of this software should understand that IBM cannot provide
* technical support for this software and will not be responsible for
* any consequences resulting from the use of this software.
*
* Any person who transfers this source code or any derivative work
* must include the IBM copyright notice, this paragraph, and the
* preceding two paragraphs in the transferred software.
*
* COPYRIGHT I B M CORPORATION 1995
* LICENSED MATERIAL - PROGRAM PROPERTY OF I B M
*-----------------------------------------------------------------------------*/
/*-----------------------------------------------------------------------------+
*
* File Name: enetemac.c
*
* Function: Device driver for the ethernet EMAC3 macro on the 405GP.
*
* Author: Mark Wisner
*
* Change Activity-
*
* Date Description of Change BY
* --------- --------------------- ---
* 05-May-99 Created MKW
* 27-Jun-99 Clean up JWB
* 16-Jul-99 Added MAL error recovery and better IP packet handling MKW
* 29-Jul-99 Added Full duplex support MKW
* 06-Aug-99 Changed names for Mal CR reg MKW
* 23-Aug-99 Turned off SYE when running at 10Mbs MKW
* 24-Aug-99 Marked descriptor empty after call_xlc MKW
* 07-Sep-99 Set MAL RX buffer size reg to ENET_MAX_MTU_ALIGNED / 16 MCG
* to avoid chaining maximum sized packets. Push starting
* RX descriptor address up to the next cache line boundary.
* 16-Jan-00 Added support for booting with IP of 0x0 MKW
* 15-Mar-00 Updated enetInit() to enable broadcast addresses in the
* EMAC_RXM register. JWB
* 12-Mar-01 anne-sophie.harnois@nextream.fr
* - Variables are compatible with those already defined in
* include/net.h
* - Receive buffer descriptor ring is used to send buffers
* to the user
* - Info print about send/received/handled packet number if
* INFO_405_ENET is set
* 17-Apr-01 stefan.roese@esd-electronics.com
* - MAL reset in "eth_halt" included
* - Enet speed and duplex output now in one line
* 08-May-01 stefan.roese@esd-electronics.com
* - MAL error handling added (eth_init called again)
* 13-Nov-01 stefan.roese@esd-electronics.com
* - Set IST bit in EMAC_M1 reg upon 100MBit or full duplex
* 04-Jan-02 stefan.roese@esd-electronics.com
* - Wait for PHY auto negotiation to complete added
* 06-Feb-02 stefan.roese@esd-electronics.com
* - Bug fixed in waiting for auto negotiation to complete
* 26-Feb-02 stefan.roese@esd-electronics.com
* - rx and tx buffer descriptors now allocated (no fixed address
* used anymore)
* 17-Jun-02 stefan.roese@esd-electronics.com
* - MAL error debug printf 'M' removed (rx de interrupt may
* occur upon many incoming packets with only 4 rx buffers).
*-----------------------------------------------------------------------------*/
#include <common.h>
#include <asm/processor.h>
#include <ppc4xx.h>
#include <commproc.h>
#include <405gp_enet.h>
#include <405_mal.h>
#include <miiphy.h>
#include <net.h>
#include <malloc.h>
#include "vecnum.h"
#if defined(CONFIG_405GP) || defined(CONFIG_440) || defined(CONFIG_405EP)
#define EMAC_RESET_TIMEOUT 1000 /* 1000 ms reset timeout */
#define PHY_AUTONEGOTIATE_TIMEOUT 4000 /* 4000 ms autonegotiate timeout */
#define NUM_TX_BUFF 1
/* AS.HARNOIS
* Use PKTBUFSRX (include/net.h) instead of setting NUM_RX_BUFF again
* These both variables are used to define the same thing!
* #define NUM_RX_BUFF 4
*/
#define NUM_RX_BUFF PKTBUFSRX
/* Ethernet Transmit and Receive Buffers */
/* AS.HARNOIS
* In the same way ENET_MAX_MTU and ENET_MAX_MTU_ALIGNED are set from
* PKTSIZE and PKTSIZE_ALIGN (include/net.h)
*/
#define ENET_MAX_MTU PKTSIZE
#define ENET_MAX_MTU_ALIGNED PKTSIZE_ALIGN
static char *txbuf_ptr;
/* define the number of channels implemented */
#define EMAC_RXCHL 1
#define EMAC_TXCHL 1
/*-----------------------------------------------------------------------------+
* Defines for MAL/EMAC interrupt conditions as reported in the UIC (Universal
* Interrupt Controller).
*-----------------------------------------------------------------------------*/
#define MAL_UIC_ERR ( UIC_MAL_SERR | UIC_MAL_TXDE | UIC_MAL_RXDE)
#define MAL_UIC_DEF (UIC_MAL_RXEOB | MAL_UIC_ERR)
#define EMAC_UIC_DEF UIC_ENET
/*-----------------------------------------------------------------------------+
* Global variables. TX and RX descriptors and buffers.
*-----------------------------------------------------------------------------*/
static volatile mal_desc_t *tx;
static volatile mal_desc_t *rx;
static mal_desc_t *alloc_tx_buf = NULL;
static mal_desc_t *alloc_rx_buf = NULL;
/* IER globals */
static unsigned long emac_ier;
static unsigned long mal_ier;
/* Statistic Areas */
#define MAX_ERR_LOG 10
struct emac_stats {
int data_len_err;
int rx_frames;
int rx;
int rx_prot_err;
};
static struct stats { /* Statistic Block */
struct emac_stats emac;
int int_err;
short tx_err_log[MAX_ERR_LOG];
short rx_err_log[MAX_ERR_LOG];
} stats;
static int first_init = 0;
static int tx_err_index = 0; /* Transmit Error Index for tx_err_log */
static int rx_err_index = 0; /* Receive Error Index for rx_err_log */
static int rx_slot = 0; /* MAL Receive Slot */
static int rx_i_index = 0; /* Receive Interrupt Queue Index */
static int rx_u_index = 0; /* Receive User Queue Index */
static int rx_ready[NUM_RX_BUFF]; /* Receive Ready Queue */
static int tx_slot = 0; /* MAL Transmit Slot */
static int tx_i_index = 0; /* Transmit Interrupt Queue Index */
static int tx_u_index = 0; /* Transmit User Queue Index */
static int tx_run[NUM_TX_BUFF]; /* Transmit Running Queue */
#undef INFO_405_ENET
#ifdef INFO_405_ENET
static int packetSent = 0;
static int packetReceived = 0;
static int packetHandled = 0;
#endif
static char emac_hwd_addr[ENET_ADDR_LENGTH];
static bd_t *bis_save = NULL; /* for eth_init upon mal error */
static int is_receiving = 0; /* sync with eth interrupt */
static int print_speed = 1; /* print speed message upon start */
/*-----------------------------------------------------------------------------+
* Prototypes and externals.
*-----------------------------------------------------------------------------*/
static void enet_rcv (unsigned long malisr);
static int enetInt(void);
static void mal_err (unsigned long isr, unsigned long uic, unsigned long mal_def,
unsigned long mal_errr);
static void emac_err (unsigned long isr);
static void ppc_4xx_eth_halt (struct eth_device *dev)
{
mtdcr (malier, 0x00000000); /* disable mal interrupts */
out32 (EMAC_IER, 0x00000000); /* disable emac interrupts */
/* 1st reset MAL */
mtdcr (malmcr, MAL_CR_MMSR);
/* wait for reset */
while (mfdcr (malmcr) & MAL_CR_MMSR) {
};
/* EMAC RESET */
out32 (EMAC_M0, EMAC_M0_SRST);
print_speed = 1; /* print speed message again next time */
}
static int ppc_4xx_eth_init (struct eth_device *dev, bd_t * bis)
{
int i;
unsigned long reg;
unsigned long msr;
unsigned long speed;
unsigned long duplex;
unsigned mode_reg;
unsigned short reg_short;
msr = mfmsr ();
mtmsr (msr & ~(MSR_EE)); /* disable interrupts */
#ifdef INFO_405_ENET
/* AS.HARNOIS
* We should have :
* packetHandled <= packetReceived <= packetHandled+PKTBUFSRX
* In the most cases packetHandled = packetReceived, but it
* is possible that new packets (without relationship with
* current transfer) have got the time to arrived before
* netloop calls eth_halt
*/
printf ("About preceeding transfer:\n"
"- Sent packet number %d\n"
"- Received packet number %d\n"
"- Handled packet number %d\n",
packetSent, packetReceived, packetHandled);
packetSent = 0;
packetReceived = 0;
packetHandled = 0;
#endif
/* MAL RESET */
mtdcr (malmcr, MAL_CR_MMSR);
/* wait for reset */
while (mfdcr (malmcr) & MAL_CR_MMSR) {
};
tx_err_index = 0; /* Transmit Error Index for tx_err_log */
rx_err_index = 0; /* Receive Error Index for rx_err_log */
rx_slot = 0; /* MAL Receive Slot */
rx_i_index = 0; /* Receive Interrupt Queue Index */
rx_u_index = 0; /* Receive User Queue Index */
tx_slot = 0; /* MAL Transmit Slot */
tx_i_index = 0; /* Transmit Interrupt Queue Index */
tx_u_index = 0; /* Transmit User Queue Index */
#if defined(CONFIG_440)
/* set RMII mode */
out32 (ZMII_FER, ZMII_RMII | ZMII_MDI0);
#endif /* CONFIG_440 */
/* EMAC RESET */
out32 (EMAC_M0, EMAC_M0_SRST);
/* wait for PHY to complete auto negotiation */
reg_short = 0;
#ifndef CONFIG_CS8952_PHY
miiphy_read (CONFIG_PHY_ADDR, PHY_BMSR, &reg_short);
/*
* Wait if PHY is able of autonegotiation and autonegotiation is not complete
*/
if ((reg_short & PHY_BMSR_AUTN_ABLE)
&& !(reg_short & PHY_BMSR_AUTN_COMP)) {
puts ("Waiting for PHY auto negotiation to complete");
i = 0;
while (!(reg_short & PHY_BMSR_AUTN_COMP)) {
/*
* Timeout reached ?
*/
if (i > PHY_AUTONEGOTIATE_TIMEOUT) {
puts (" TIMEOUT !\n");
break;
}
if ((i++ % 1000) == 0)
putc ('.');
udelay (1000); /* 1 ms */
miiphy_read (CONFIG_PHY_ADDR, PHY_BMSR, &reg_short);
}
puts (" done\n");
udelay (500000); /* another 500 ms (results in faster booting) */
}
#endif
speed = miiphy_speed (CONFIG_PHY_ADDR);
duplex = miiphy_duplex (CONFIG_PHY_ADDR);
if (print_speed) {
print_speed = 0;
printf ("ENET Speed is %d Mbps - %s duplex connection\n",
(int) speed, (duplex == HALF) ? "HALF" : "FULL");
}
/* set the Mal configuration reg */
#if defined(CONFIG_440)
/* Errata 1.12: MAL_1 -- Disable MAL bursting */
if( get_pvr() == PVR_440GP_RB )
mtdcr (malmcr, MAL_CR_OPBBL | MAL_CR_LEA | MAL_CR_PLBLT_DEFAULT);
else
#else
mtdcr (malmcr, MAL_CR_PLBB | MAL_CR_OPBBL | MAL_CR_LEA | MAL_CR_PLBLT_DEFAULT);
#endif
/* Free "old" buffers */
if (alloc_tx_buf) free(alloc_tx_buf);
if (alloc_rx_buf) free(alloc_rx_buf);
/*
* Malloc MAL buffer desciptors, make sure they are
* aligned on cache line boundary size
* (401/403/IOP480 = 16, 405 = 32)
* and doesn't cross cache block boundaries.
*/
alloc_tx_buf = (mal_desc_t *)malloc((sizeof(mal_desc_t) * NUM_TX_BUFF) +
((2 * CFG_CACHELINE_SIZE) - 2));
if (((int)alloc_tx_buf & CACHELINE_MASK) != 0) {
tx = (mal_desc_t *)((int)alloc_tx_buf + CFG_CACHELINE_SIZE -
((int)alloc_tx_buf & CACHELINE_MASK));
} else {
tx = alloc_tx_buf;
}
alloc_rx_buf = (mal_desc_t *)malloc((sizeof(mal_desc_t) * NUM_RX_BUFF) +
((2 * CFG_CACHELINE_SIZE) - 2));
if (((int)alloc_rx_buf & CACHELINE_MASK) != 0) {
rx = (mal_desc_t *)((int)alloc_rx_buf + CFG_CACHELINE_SIZE -
((int)alloc_rx_buf & CACHELINE_MASK));
} else {
rx = alloc_rx_buf;
}
for (i = 0; i < NUM_TX_BUFF; i++) {
tx[i].ctrl = 0;
tx[i].data_len = 0;
if (first_init == 0)
txbuf_ptr = (char *) malloc (ENET_MAX_MTU_ALIGNED);
tx[i].data_ptr = txbuf_ptr;
if ((NUM_TX_BUFF - 1) == i)
tx[i].ctrl |= MAL_TX_CTRL_WRAP;
tx_run[i] = -1;
#if 0
printf ("TX_BUFF %d @ 0x%08lx\n", i, (ulong) tx[i].data_ptr);
#endif
}
for (i = 0; i < NUM_RX_BUFF; i++) {
rx[i].ctrl = 0;
rx[i].data_len = 0;
/* rx[i].data_ptr = (char *) &rx_buff[i]; */
rx[i].data_ptr = (char *) NetRxPackets[i];
if ((NUM_RX_BUFF - 1) == i)
rx[i].ctrl |= MAL_RX_CTRL_WRAP;
rx[i].ctrl |= MAL_RX_CTRL_EMPTY | MAL_RX_CTRL_INTR;
rx_ready[i] = -1;
#if 0
printf ("RX_BUFF %d @ 0x%08lx\n", i, (ulong) rx[i].data_ptr);
#endif
}
memcpy (emac_hwd_addr, bis->bi_enetaddr, ENET_ADDR_LENGTH);
reg = 0x00000000;
reg |= emac_hwd_addr[0]; /* set high address */
reg = reg << 8;
reg |= emac_hwd_addr[1];
out32 (EMAC_IAH, reg);
reg = 0x00000000;
reg |= emac_hwd_addr[2]; /* set low address */
reg = reg << 8;
reg |= emac_hwd_addr[3];
reg = reg << 8;
reg |= emac_hwd_addr[4];
reg = reg << 8;
reg |= emac_hwd_addr[5];
out32 (EMAC_IAL, reg);
/* setup MAL tx & rx channel pointers */
mtdcr (maltxctp0r, tx);
mtdcr (malrxctp0r, rx);
/* Reset transmit and receive channels */
mtdcr (malrxcarr, 0x80000000); /* 2 channels */
mtdcr (maltxcarr, 0x80000000); /* 2 channels */
/* Enable MAL transmit and receive channels */
mtdcr (maltxcasr, 0x80000000); /* 1 channel */
mtdcr (malrxcasr, 0x80000000); /* 1 channel */
/* set RX buffer size */
mtdcr (malrcbs0, ENET_MAX_MTU_ALIGNED / 16);
/* set transmit enable & receive enable */
out32 (EMAC_M0, EMAC_M0_TXE | EMAC_M0_RXE);
/* set receive fifo to 4k and tx fifo to 2k */
mode_reg = EMAC_M1_RFS_4K | EMAC_M1_TX_FIFO_2K;
/* set speed */
if (speed == _100BASET)
mode_reg = mode_reg | EMAC_M1_MF_100MBPS | EMAC_M1_IST;
else
mode_reg = mode_reg & ~0x00C00000; /* 10 MBPS */
if (duplex == FULL)
mode_reg = mode_reg | 0x80000000 | EMAC_M1_IST;
out32 (EMAC_M1, mode_reg);
/* Enable broadcast and indvidual address */
out32 (EMAC_RXM, EMAC_RMR_BAE | EMAC_RMR_IAE
/*| EMAC_RMR_ARRP| EMAC_RMR_SFCS | EMAC_RMR_SP */ );
/* we probably need to set the tx mode1 reg? maybe at tx time */
/* set transmit request threshold register */
out32 (EMAC_TRTR, 0x18000000); /* 256 byte threshold */
/* set receive low/high water mark register */
#if defined(CONFIG_440)
/* 440GP has a 64 byte burst length */
out32 (EMAC_RX_HI_LO_WMARK, 0x80009000);
out32 (EMAC_TXM1, 0xf8640000);
#else /* CONFIG_440 */
/* 405s have a 16 byte burst length */
out32 (EMAC_RX_HI_LO_WMARK, 0x0f002000);
#endif /* CONFIG_440 */
/* Frame gap set */
out32 (EMAC_I_FRAME_GAP_REG, 0x00000008);
if (first_init == 0) {
/*
* Connect interrupt service routines
*/
irq_install_handler (VECNUM_EWU0, (interrupt_handler_t *) enetInt, NULL);
irq_install_handler (VECNUM_MS, (interrupt_handler_t *) enetInt, NULL);
irq_install_handler (VECNUM_MTE, (interrupt_handler_t *) enetInt, NULL);
irq_install_handler (VECNUM_MRE, (interrupt_handler_t *) enetInt, NULL);
irq_install_handler (VECNUM_TXDE, (interrupt_handler_t *) enetInt, NULL);
irq_install_handler (VECNUM_RXDE, (interrupt_handler_t *) enetInt, NULL);
irq_install_handler (VECNUM_ETH0, (interrupt_handler_t *) enetInt, NULL);
}
/* set up interrupt handler */
/* setup interrupt controler to take interrupts from the MAL &
EMAC */
mtdcr (uicsr, 0xffffffff); /* clear pending interrupts */
mtdcr (uicer, mfdcr (uicer) | MAL_UIC_DEF | EMAC_UIC_DEF);
/* set the MAL IER ??? names may change with new spec ??? */
mal_ier = MAL_IER_DE | MAL_IER_NE | MAL_IER_TE | MAL_IER_OPBE |
MAL_IER_PLBE;
mtdcr (malesr, 0xffffffff); /* clear pending interrupts */
mtdcr (maltxdeir, 0xffffffff); /* clear pending interrupts */
mtdcr (malrxdeir, 0xffffffff); /* clear pending interrupts */
mtdcr (malier, mal_ier);
/* Set EMAC IER */
emac_ier = EMAC_ISR_PTLE | EMAC_ISR_BFCS |
EMAC_ISR_PTLE | EMAC_ISR_ORE | EMAC_ISR_IRE;
if (speed == _100BASET)
emac_ier = emac_ier | EMAC_ISR_SYE;
out32 (EMAC_ISR, 0xffffffff); /* clear pending interrupts */
out32 (EMAC_IER, emac_ier);
mtmsr (msr); /* enable interrupts again */
bis_save = bis;
first_init = 1;
return (1);
}
static int ppc_4xx_eth_send (struct eth_device *dev, volatile void *ptr, int len)
{
struct enet_frame *ef_ptr;
ulong time_start, time_now;
unsigned long temp_txm0;
ef_ptr = (struct enet_frame *) ptr;
/*-----------------------------------------------------------------------+
* Copy in our address into the frame.
*-----------------------------------------------------------------------*/
(void) memcpy (ef_ptr->source_addr, emac_hwd_addr, ENET_ADDR_LENGTH);
/*-----------------------------------------------------------------------+
* If frame is too long or too short, modify length.
*-----------------------------------------------------------------------*/
if (len > ENET_MAX_MTU)
len = ENET_MAX_MTU;
/* memcpy ((void *) &tx_buff[tx_slot], (const void *) ptr, len); */
memcpy ((void *) txbuf_ptr, (const void *) ptr, len);
/*-----------------------------------------------------------------------+
* set TX Buffer busy, and send it
*-----------------------------------------------------------------------*/
tx[tx_slot].ctrl = (MAL_TX_CTRL_LAST |
EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP) &
~(EMAC_TX_CTRL_ISA | EMAC_TX_CTRL_RSA);
if ((NUM_TX_BUFF - 1) == tx_slot)
tx[tx_slot].ctrl |= MAL_TX_CTRL_WRAP;
tx[tx_slot].data_len = (short) len;
tx[tx_slot].ctrl |= MAL_TX_CTRL_READY;
__asm__ volatile ("eieio");
out32 (EMAC_TXM0, in32 (EMAC_TXM0) | EMAC_TXM0_GNP0);
#ifdef INFO_405_ENET
packetSent++;
#endif
/*-----------------------------------------------------------------------+
* poll unitl the packet is sent and then make sure it is OK
*-----------------------------------------------------------------------*/
time_start = get_timer (0);
while (1) {
temp_txm0 = in32 (EMAC_TXM0);
/* loop until either TINT turns on or 3 seconds elapse */
if ((temp_txm0 & EMAC_TXM0_GNP0) != 0) {
/* transmit is done, so now check for errors
* If there is an error, an interrupt should
* happen when we return
*/
time_now = get_timer (0);
if ((time_now - time_start) > 3000) {
return (-1);
}
} else {
return (len);
}
}
}
#if defined(CONFIG_440)
/*-----------------------------------------------------------------------------+
| EnetInt.
| EnetInt is the interrupt handler. It will determine the
| cause of the interrupt and call the apporpriate servive
| routine.
+-----------------------------------------------------------------------------*/
int enetInt ()
{
int serviced;
int rc = -1; /* default to not us */
unsigned long mal_isr;
unsigned long emac_isr = 0;
unsigned long mal_rx_eob;
unsigned long my_uic0msr, my_uic1msr;
/* enter loop that stays in interrupt code until nothing to service */
do {
serviced = 0;
my_uic0msr = mfdcr (uic0msr);
my_uic1msr = mfdcr (uic1msr);
if (!(my_uic0msr & UIC_MRE)
&& !(my_uic1msr & (UIC_ETH0 | UIC_MS | UIC_MTDE | UIC_MRDE))) {
/* not for us */
return (rc);
}
/* get and clear controller status interrupts */
/* look at Mal and EMAC interrupts */
if ((my_uic0msr & UIC_MRE)
|| (my_uic1msr & (UIC_MS | UIC_MTDE | UIC_MRDE))) {
/* we have a MAL interrupt */
mal_isr = mfdcr (malesr);
/* look for mal error */
if (my_uic1msr & (UIC_MS | UIC_MTDE | UIC_MRDE)) {
mal_err (mal_isr, my_uic0msr, MAL_UIC_DEF, MAL_UIC_ERR);
serviced = 1;
rc = 0;
}
}
if (UIC_ETH0 & my_uic1msr) { /* look for EMAC errors */
emac_isr = in32 (EMAC_ISR);
if ((emac_ier & emac_isr) != 0) {
emac_err (emac_isr);
serviced = 1;
rc = 0;
}
}
if ((emac_ier & emac_isr)
|| (my_uic1msr & (UIC_MS | UIC_MTDE | UIC_MRDE))) {
mtdcr (uic0sr, UIC_MRE); /* Clear */
mtdcr (uic1sr, UIC_ETH0 | UIC_MS | UIC_MTDE | UIC_MRDE); /* Clear */
return (rc); /* we had errors so get out */
}
/* handle MAL RX EOB interupt from a receive */
/* check for EOB on valid channels */
if (my_uic0msr & UIC_MRE) {
mal_rx_eob = mfdcr (malrxeobisr);
if ((mal_rx_eob & 0x80000000) != 0) { /* call emac routine for channel 0 */
/* clear EOB
mtdcr(malrxeobisr, mal_rx_eob); */
enet_rcv (emac_isr);
/* indicate that we serviced an interrupt */
serviced = 1;
rc = 0;
}
}
mtdcr (uic0sr, UIC_MRE); /* Clear */
mtdcr (uic1sr, UIC_ETH0 | UIC_MS | UIC_MTDE | UIC_MRDE); /* Clear */
} while (serviced);
return (rc);
}
#else /* CONFIG_440 */
/*-----------------------------------------------------------------------------+
* EnetInt.
* EnetInt is the interrupt handler. It will determine the
* cause of the interrupt and call the apporpriate servive
* routine.
*-----------------------------------------------------------------------------*/
int enetInt ()
{
int serviced;
int rc = -1; /* default to not us */
unsigned long mal_isr;
unsigned long emac_isr = 0;
unsigned long mal_rx_eob;
unsigned long my_uicmsr;
/* enter loop that stays in interrupt code until nothing to service */
do {
serviced = 0;
my_uicmsr = mfdcr (uicmsr);
if ((my_uicmsr & (MAL_UIC_DEF | EMAC_UIC_DEF)) == 0) { /* not for us */
return (rc);
}
/* get and clear controller status interrupts */
/* look at Mal and EMAC interrupts */
if ((MAL_UIC_DEF & my_uicmsr) != 0) { /* we have a MAL interrupt */
mal_isr = mfdcr (malesr);
/* look for mal error */
if ((my_uicmsr & MAL_UIC_ERR) != 0) {
mal_err (mal_isr, my_uicmsr, MAL_UIC_DEF, MAL_UIC_ERR);
serviced = 1;
rc = 0;
}
}
if ((EMAC_UIC_DEF & my_uicmsr) != 0) { /* look for EMAC errors */
emac_isr = in32 (EMAC_ISR);
if ((emac_ier & emac_isr) != 0) {
emac_err (emac_isr);
serviced = 1;
rc = 0;
}
}
if (((emac_ier & emac_isr) != 0) | ((MAL_UIC_ERR & my_uicmsr) != 0)) {
mtdcr (uicsr, MAL_UIC_DEF | EMAC_UIC_DEF); /* Clear */
return (rc); /* we had errors so get out */
}
/* handle MAL RX EOB interupt from a receive */
/* check for EOB on valid channels */
if ((my_uicmsr & UIC_MAL_RXEOB) != 0) {
mal_rx_eob = mfdcr (malrxeobisr);
if ((mal_rx_eob & 0x80000000) != 0) { /* call emac routine for channel 0 */
/* clear EOB
mtdcr(malrxeobisr, mal_rx_eob); */
enet_rcv (emac_isr);
/* indicate that we serviced an interrupt */
serviced = 1;
rc = 0;
}
}
mtdcr (uicsr, MAL_UIC_DEF | EMAC_UIC_DEF); /* Clear */
}
while (serviced);
return (rc);
}
#endif /* CONFIG_440 */
/*-----------------------------------------------------------------------------+
* MAL Error Routine
*-----------------------------------------------------------------------------*/
static void mal_err (unsigned long isr, unsigned long uic, unsigned long maldef,
unsigned long mal_errr)
{
mtdcr (malesr, isr); /* clear interrupt */
/* clear DE interrupt */
mtdcr (maltxdeir, 0xC0000000);
mtdcr (malrxdeir, 0x80000000);
#ifdef INFO_405_ENET
printf ("\nMAL error occured.... ISR = %lx UIC = = %lx MAL_DEF = %lx MAL_ERR= %lx \n",
isr, uic, maldef, mal_errr);
#else
#if 0
/*
* MAL error is RX DE error (out of rx buffers)! This is OK here, upon
* many incoming packets with only 4 rx buffers.
*/
printf ("M"); /* just to see something upon mal error */
#endif
#endif
eth_init (bis_save); /* start again... */
}
/*-----------------------------------------------------------------------------+
* EMAC Error Routine
*-----------------------------------------------------------------------------*/
static void emac_err (unsigned long isr)
{
printf ("EMAC error occured.... ISR = %lx\n", isr);
out32 (EMAC_ISR, isr);
}
/*-----------------------------------------------------------------------------+
* enet_rcv() handles the ethernet receive data
*-----------------------------------------------------------------------------*/
static void enet_rcv (unsigned long malisr)
{
struct enet_frame *ef_ptr;
unsigned long data_len;
unsigned long rx_eob_isr;
int handled = 0;
int i;
int loop_count = 0;
rx_eob_isr = mfdcr (malrxeobisr);
if ((0x80000000 >> (EMAC_RXCHL - 1)) & rx_eob_isr) {
/* clear EOB */
mtdcr (malrxeobisr, rx_eob_isr);
/* EMAC RX done */
while (1) { /* do all */
i = rx_slot;
if ((MAL_RX_CTRL_EMPTY & rx[i].ctrl)
|| (loop_count >= NUM_RX_BUFF))
break;
loop_count++;
rx_slot++;
if (NUM_RX_BUFF == rx_slot)
rx_slot = 0;
handled++;
data_len = (unsigned long) rx[i].data_len; /* Get len */
if (data_len) {
if (data_len > ENET_MAX_MTU) /* Check len */
data_len = 0;
else {
if (EMAC_RX_ERRORS & rx[i].ctrl) { /* Check Errors */
data_len = 0;
stats.rx_err_log[rx_err_index] = rx[i].ctrl;
rx_err_index++;
if (rx_err_index == MAX_ERR_LOG)
rx_err_index = 0;
} /* emac_erros */
} /* data_len < max mtu */
} /* if data_len */
if (!data_len) { /* no data */
rx[i].ctrl |= MAL_RX_CTRL_EMPTY; /* Free Recv Buffer */
stats.emac.data_len_err++; /* Error at Rx */
}
/* !data_len */
/* AS.HARNOIS */
/* Check if user has already eaten buffer */
/* if not => ERROR */
else if (rx_ready[rx_i_index] != -1) {
if (is_receiving)
printf ("ERROR : Receive buffers are full!\n");
break;
} else {
stats.emac.rx_frames++;
stats.emac.rx += data_len;
ef_ptr = (struct enet_frame *) rx[i].data_ptr;
#ifdef INFO_405_ENET
packetReceived++;
#endif
/* AS.HARNOIS
* use ring buffer
*/
rx_ready[rx_i_index] = i;
rx_i_index++;
if (NUM_RX_BUFF == rx_i_index)
rx_i_index = 0;
/* printf("X"); /|* test-only *|/ */
/* AS.HARNOIS
* free receive buffer only when
* buffer has been handled (eth_rx)
rx[i].ctrl |= MAL_RX_CTRL_EMPTY;
*/
} /* if data_len */
} /* while */
} /* if EMACK_RXCHL */
}
static int ppc_4xx_eth_rx (struct eth_device *dev)
{
int length;
int user_index;
unsigned long msr;
is_receiving = 1; /* tell driver */
for (;;) {
/* AS.HARNOIS
* use ring buffer and
* get index from rx buffer desciptor queue
*/
user_index = rx_ready[rx_u_index];
if (user_index == -1) {
length = -1;
break; /* nothing received - leave for() loop */
}
msr = mfmsr ();
mtmsr (msr & ~(MSR_EE));
length = rx[user_index].data_len;
/* Pass the packet up to the protocol layers. */
/* NetReceive(NetRxPackets[rxIdx], length - 4); */
/* NetReceive(NetRxPackets[i], length); */
NetReceive (NetRxPackets[user_index], length - 4);
/* Free Recv Buffer */
rx[user_index].ctrl |= MAL_RX_CTRL_EMPTY;
/* Free rx buffer descriptor queue */
rx_ready[rx_u_index] = -1;
rx_u_index++;
if (NUM_RX_BUFF == rx_u_index)
rx_u_index = 0;
#ifdef INFO_405_ENET
packetHandled++;
#endif
mtmsr (msr); /* Enable IRQ's */
}
is_receiving = 0; /* tell driver */
return length;
}
#if defined(CONFIG_NET_MULTI)
int ppc_4xx_eth_initialize(bd_t *bis)
{
struct eth_device *dev;
int eth_num = 0;
dev = malloc (sizeof *dev);
if (dev == NULL) {
printf(__FUNCTION__ ": Cannot allocate eth_device\n");
return (-1);
}
sprintf(dev->name, "ppc_4xx_eth%d", eth_num);
dev->priv = (void *) eth_num;
dev->init = ppc_4xx_eth_init;
dev->halt = ppc_4xx_eth_halt;
dev->send = ppc_4xx_eth_send;
dev->recv = ppc_4xx_eth_rx;
eth_register (dev);
}
#else /* !defined(CONFIG_NET_MULTI) */
void eth_halt (void)
{
ppc_4xx_eth_halt(NULL);
}
int eth_init (bd_t *bis)
{
return (ppc_4xx_eth_init(NULL, bis));
}
int eth_send(volatile void *packet, int length)
{
return (ppc_4xx_eth_send(NULL, packet, length));
}
int eth_rx(void)
{
return (ppc_4xx_eth_rx(NULL));
}
#endif /* !defined(CONFIG_NET_MULTI) */
#endif /* CONFIG_405GP */
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