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u-boot/cpu/ppc4xx/405gp_enet.c
Stefan Roese 17f50f22bc Add support for AMCC Bamboo PPC440EP eval board 
Patch by Stefan Roese, 04 Aug 2005
2005-08-04 17:09:16 +02:00

1062 lines
31 KiB
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).
* 21-Nov-03 pavel.bartusek@sysgo.com
* - set ZMII bridge speed on 440
*
*-----------------------------------------------------------------------------*/
#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_405EP) || \
( defined(CONFIG_440) && !defined(CONFIG_NET_MULTI))
#if !defined(CONFIG_NET_MULTI) || !defined(CONFIG_405EP)
/* 405GP, 440 with !CONFIG_NET_MULTI. For 440 only EMAC0 is supported */
#define EMAC_NUM_DEV 1
#else
/* 440EP && CONFIG_NET_MULTI */
#define EMAC_NUM_DEV 2
#endif
#define EMAC_RESET_TIMEOUT 1000 /* 1000 ms reset timeout */
#define PHY_AUTONEGOTIATE_TIMEOUT 4000 /* 4000 ms autonegotiate timeout */
/* 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
/* define the number of channels implemented */
#define EMAC_RXCHL EMAC_NUM_DEV
#define EMAC_TXCHL EMAC_NUM_DEV
/*-----------------------------------------------------------------------------+
* 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
#define EMAC_UIC_DEF1 UIC_ENET1
#define SEL_UIC_DEF(p) (p ? UIC_ENET1 : UIC_ENET )
/*-----------------------------------------------------------------------------+
* Global variables. TX and RX descriptors and buffers.
*-----------------------------------------------------------------------------*/
/* IER globals */
static uint32_t mal_ier;
#if !defined(CONFIG_NET_MULTI)
struct eth_device *emac0_dev;
#endif
/*-----------------------------------------------------------------------------+
* Prototypes and externals.
*-----------------------------------------------------------------------------*/
static void enet_rcv (struct eth_device *dev, unsigned long malisr);
int enetInt (struct eth_device *dev);
static void mal_err (struct eth_device *dev, unsigned long isr,
unsigned long uic, unsigned long maldef,
unsigned long mal_errr);
static void emac_err (struct eth_device *dev, unsigned long isr);
/*-----------------------------------------------------------------------------+
| ppc_405x_eth_halt
| Disable MAL channel, and EMACn
|
|
+-----------------------------------------------------------------------------*/
static void ppc_4xx_eth_halt (struct eth_device *dev)
{
EMAC_405_HW_PST hw_p = dev->priv;
uint32_t failsafe = 10000;
mtdcr (malier, 0x00000000); /* disable mal interrupts */
out32 (EMAC_IER + hw_p->hw_addr, 0x00000000); /* disable emac interrupts */
/* 1st reset MAL channel */
/* Note: writing a 0 to a channel has no effect */
mtdcr (maltxcarr, (MAL_CR_MMSR >> (hw_p->devnum * 2)));
mtdcr (malrxcarr, (MAL_CR_MMSR >> hw_p->devnum));
/* wait for reset */
while (mfdcr (malrxcasr) & (MAL_CR_MMSR >> hw_p->devnum)) {
udelay (1000); /* Delay 1 MS so as not to hammer the register */
failsafe--;
if (failsafe == 0)
break;
}
/* EMAC RESET */
out32 (EMAC_M0 + hw_p->hw_addr, EMAC_M0_SRST);
hw_p->print_speed = 1; /* print speed message again next time */
return;
}
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 long failsafe;
unsigned mode_reg;
unsigned short devnum;
unsigned short reg_short;
EMAC_405_HW_PST hw_p = dev->priv;
/* before doing anything, figure out if we have a MAC address */
/* if not, bail */
if (memcmp (dev->enetaddr, "\0\0\0\0\0\0", 6) == 0)
return -1;
msr = mfmsr ();
mtmsr (msr & ~(MSR_EE)); /* disable interrupts */
devnum = hw_p->devnum;
#ifdef INFO_405_ENET
/* AS.HARNOIS
* We should have :
* hw_p->stats.pkts_handled <= hw_p->stats.pkts_rx <= hw_p->stats.pkts_handled+PKTBUFSRX
* In the most cases hw_p->stats.pkts_handled = hw_p->stats.pkts_rx, 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 (eth%d):\n"
"- Sent packet number %d\n"
"- Received packet number %d\n"
"- Handled packet number %d\n",
hw_p->devnum,
hw_p->stats.pkts_tx,
hw_p->stats.pkts_rx, hw_p->stats.pkts_handled);
hw_p->stats.pkts_tx = 0;
hw_p->stats.pkts_rx = 0;
hw_p->stats.pkts_handled = 0;
#endif
/* MAL RESET */
mtdcr (malmcr, MAL_CR_MMSR);
/* wait for reset */
while (mfdcr (malmcr) & MAL_CR_MMSR) {
};
#if defined(CONFIG_440_EP) || defined(CONFIG_440_GR)
out32 (ZMII_FER, 0);
udelay(100);
/* set RII mode */
out32 (ZMII_FER, ZMII_RMII | ZMII_MDI0);
#elif defined(CONFIG_440)
/* set RMII mode */
out32 (ZMII_FER, ZMII_RMII | ZMII_MDI0);
#endif /* CONFIG_440 */
/* MAL Channel RESET */
/* 1st reset MAL channel */
/* Note: writing a 0 to a channel has no effect */
mtdcr (maltxcarr, (MAL_TXRX_CASR >> (hw_p->devnum * 2)));
mtdcr (malrxcarr, (MAL_TXRX_CASR >> hw_p->devnum));
/* wait for reset */
/* TBS: should have udelay and failsafe here */
failsafe = 10000;
/* wait for reset */
while (mfdcr (malrxcasr) & (MAL_CR_MMSR >> hw_p->devnum)) {
udelay (1000); /* Delay 1 MS so as not to hammer the register */
failsafe--;
if (failsafe == 0)
break;
}
hw_p->tx_err_index = 0; /* Transmit Error Index for tx_err_log */
hw_p->rx_err_index = 0; /* Receive Error Index for rx_err_log */
hw_p->rx_slot = 0; /* MAL Receive Slot */
hw_p->rx_i_index = 0; /* Receive Interrupt Queue Index */
hw_p->rx_u_index = 0; /* Receive User Queue Index */
hw_p->tx_slot = 0; /* MAL Transmit Slot */
hw_p->tx_i_index = 0; /* Transmit Interrupt Queue Index */
hw_p->tx_u_index = 0; /* Transmit User Queue Index */
__asm__ volatile ("eieio");
/* reset emac so we have access to the phy */
out32 (EMAC_M0 + hw_p->hw_addr, EMAC_M0_SRST);
__asm__ volatile ("eieio");
failsafe = 1000;
while ((in32 (EMAC_M0 + hw_p->hw_addr) & (EMAC_M0_SRST)) && failsafe) {
udelay (1000);
failsafe--;
}
#if defined(CONFIG_NET_MULTI)
reg = hw_p->devnum ? CONFIG_PHY1_ADDR : CONFIG_PHY_ADDR;
#else
reg = CONFIG_PHY_ADDR;
#endif
/* wait for PHY to complete auto negotiation */
reg_short = 0;
#ifndef CONFIG_CS8952_PHY
miiphy_read (reg, PHY_BMSR, &reg_short);
/*
* Wait if PHY is capable 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 (reg, PHY_BMSR, &reg_short);
}
puts (" done\n");
udelay (500000); /* another 500 ms (results in faster booting) */
}
#endif
speed = miiphy_speed (reg);
duplex = miiphy_duplex (reg);
if (hw_p->print_speed) {
hw_p->print_speed = 0;
printf ("ENET Speed is %d Mbps - %s duplex connection\n",
(int) speed, (duplex == HALF) ? "HALF" : "FULL");
}
mtdcr (malmcr, MAL_CR_PLBB | MAL_CR_OPBBL | MAL_CR_LEA | MAL_CR_PLBLT_DEFAULT);
/* Errata 1.12: MAL_1 -- Disable MAL bursting */
if (get_pvr() == PVR_440GP_RB) {
mtdcr (malmcr, mfdcr(malmcr) & ~MAL_CR_PLBB);
}
/* Free "old" buffers */
if (hw_p->alloc_tx_buf)
free (hw_p->alloc_tx_buf);
if (hw_p->alloc_rx_buf)
free (hw_p->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.
*/
hw_p->alloc_tx_buf =
(mal_desc_t *) malloc ((sizeof (mal_desc_t) * NUM_TX_BUFF) +
((2 * CFG_CACHELINE_SIZE) - 2));
if (((int) hw_p->alloc_tx_buf & CACHELINE_MASK) != 0) {
hw_p->tx =
(mal_desc_t *) ((int) hw_p->alloc_tx_buf +
CFG_CACHELINE_SIZE -
((int) hw_p->
alloc_tx_buf & CACHELINE_MASK));
} else {
hw_p->tx = hw_p->alloc_tx_buf;
}
hw_p->alloc_rx_buf =
(mal_desc_t *) malloc ((sizeof (mal_desc_t) * NUM_RX_BUFF) +
((2 * CFG_CACHELINE_SIZE) - 2));
if (((int) hw_p->alloc_rx_buf & CACHELINE_MASK) != 0) {
hw_p->rx =
(mal_desc_t *) ((int) hw_p->alloc_rx_buf +
CFG_CACHELINE_SIZE -
((int) hw_p->
alloc_rx_buf & CACHELINE_MASK));
} else {
hw_p->rx = hw_p->alloc_rx_buf;
}
for (i = 0; i < NUM_TX_BUFF; i++) {
hw_p->tx[i].ctrl = 0;
hw_p->tx[i].data_len = 0;
if (hw_p->first_init == 0)
hw_p->txbuf_ptr =
(char *) malloc (ENET_MAX_MTU_ALIGNED);
hw_p->tx[i].data_ptr = hw_p->txbuf_ptr;
if ((NUM_TX_BUFF - 1) == i)
hw_p->tx[i].ctrl |= MAL_TX_CTRL_WRAP;
hw_p->tx_run[i] = -1;
#if 0
printf ("TX_BUFF %d @ 0x%08lx\n", i,
(ulong) hw_p->tx[i].data_ptr);
#endif
}
for (i = 0; i < NUM_RX_BUFF; i++) {
hw_p->rx[i].ctrl = 0;
hw_p->rx[i].data_len = 0;
/* rx[i].data_ptr = (char *) &rx_buff[i]; */
hw_p->rx[i].data_ptr = (char *) NetRxPackets[i];
if ((NUM_RX_BUFF - 1) == i)
hw_p->rx[i].ctrl |= MAL_RX_CTRL_WRAP;
hw_p->rx[i].ctrl |= MAL_RX_CTRL_EMPTY | MAL_RX_CTRL_INTR;
hw_p->rx_ready[i] = -1;
#if 0
printf ("RX_BUFF %d @ 0x%08lx\n", i, (ulong) rx[i].data_ptr);
#endif
}
reg = 0x00000000;
reg |= dev->enetaddr[0]; /* set high address */
reg = reg << 8;
reg |= dev->enetaddr[1];
out32 (EMAC_IAH + hw_p->hw_addr, reg);
reg = 0x00000000;
reg |= dev->enetaddr[2]; /* set low address */
reg = reg << 8;
reg |= dev->enetaddr[3];
reg = reg << 8;
reg |= dev->enetaddr[4];
reg = reg << 8;
reg |= dev->enetaddr[5];
out32 (EMAC_IAL + hw_p->hw_addr, reg);
switch (devnum) {
#if defined(CONFIG_NET_MULTI)
case 1:
/* setup MAL tx & rx channel pointers */
/* For 405EP, the EMAC1 tx channel 0 is MAL tx channel 2 */
mtdcr (maltxctp2r, hw_p->tx);
mtdcr (malrxctp1r, hw_p->rx);
/* set RX buffer size */
mtdcr (malrcbs1, ENET_MAX_MTU_ALIGNED / 16);
break;
#endif
case 0:
default:
/* setup MAL tx & rx channel pointers */
mtdcr (maltxctp0r, hw_p->tx);
mtdcr (malrxctp0r, hw_p->rx);
/* set RX buffer size */
mtdcr (malrcbs0, ENET_MAX_MTU_ALIGNED / 16);
break;
}
/* Enable MAL transmit and receive channels */
mtdcr (maltxcasr, (MAL_TXRX_CASR >> (hw_p->devnum * 2)));
mtdcr (malrxcasr, (MAL_TXRX_CASR >> hw_p->devnum));
/* set transmit enable & receive enable */
out32 (EMAC_M0 + hw_p->hw_addr, EMAC_M0_TXE | EMAC_M0_RXE);
/* set receive fifo to 4k and tx fifo to 2k */
mode_reg = in32 (EMAC_M1 + hw_p->hw_addr);
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 + hw_p->hw_addr, mode_reg);
#if defined(CONFIG_440)
/* set speed in the ZMII bridge */
if (speed == _100BASET)
out32(ZMII_SSR, in32(ZMII_SSR) | 0x10000000);
else
out32(ZMII_SSR, in32(ZMII_SSR) & ~0x10000000);
#if defined(CONFIG_440_EP) || defined(CONFIG_440_GR)
mfsdr(sdr_mfr, reg);
/* set speed */
if (speed == _100BASET) {
out32(ZMII_SSR, in32(ZMII_SSR) | 0x10000000);
reg = (reg & ~SDR0_MFR_ZMII_MODE_MASK) | SDR0_MFR_ZMII_MODE_RMII_100M;
} else {
reg = (reg & ~SDR0_MFR_ZMII_MODE_MASK) | SDR0_MFR_ZMII_MODE_RMII_10M;
out32(ZMII_SSR, in32(ZMII_SSR) & ~0x10000000);
}
mtsdr(sdr_mfr, reg);
#endif
#endif
/* Enable broadcast and indvidual address */
/* TBS: enabling runts as some misbehaved nics will send runts */
out32 (EMAC_RXM + hw_p->hw_addr, EMAC_RMR_BAE | EMAC_RMR_IAE);
/* we probably need to set the tx mode1 reg? maybe at tx time */
/* set transmit request threshold register */
out32 (EMAC_TRTR + hw_p->hw_addr, 0x18000000); /* 256 byte threshold */
#if defined(CONFIG_440)
/* 440GP has a 64 byte burst length */
out32 (EMAC_RX_HI_LO_WMARK + hw_p->hw_addr, 0x0f002000);
out32 (EMAC_TXM1 + hw_p->hw_addr, 0xf8640000);
#else
/* 405s have a 16 byte burst length */
out32 (EMAC_RX_HI_LO_WMARK + hw_p->hw_addr, 0x0f002000);
#endif
/* Frame gap set */
out32 (EMAC_I_FRAME_GAP_REG + hw_p->hw_addr, 0x00000008);
/* Set EMAC IER */
hw_p->emac_ier = EMAC_ISR_PTLE | EMAC_ISR_BFCS |
EMAC_ISR_ORE | EMAC_ISR_IRE;
if (speed == _100BASET)
hw_p->emac_ier = hw_p->emac_ier | EMAC_ISR_SYE;
out32 (EMAC_ISR + hw_p->hw_addr, 0xffffffff); /* clear pending interrupts */
out32 (EMAC_IER + hw_p->hw_addr, hw_p->emac_ier);
if (hw_p->first_init == 0) {
/*
* Connect interrupt service routines
*/
irq_install_handler (VECNUM_ETH0 + (hw_p->devnum * 2),
(interrupt_handler_t *) enetInt, dev);
}
mtmsr (msr); /* enable interrupts again */
hw_p->bis = bis;
hw_p->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;
EMAC_405_HW_PST hw_p = dev->priv;
ef_ptr = (struct enet_frame *) ptr;
/*-----------------------------------------------------------------------+
* Copy in our address into the frame.
*-----------------------------------------------------------------------*/
(void) memcpy (ef_ptr->source_addr, dev->enetaddr, ENET_ADDR_LENGTH);
/*-----------------------------------------------------------------------+
* If frame is too long or too short, modify length.
*-----------------------------------------------------------------------*/
/* TBS: where does the fragment go???? */
if (len > ENET_MAX_MTU)
len = ENET_MAX_MTU;
/* memcpy ((void *) &tx_buff[tx_slot], (const void *) ptr, len); */
memcpy ((void *) hw_p->txbuf_ptr, (const void *) ptr, len);
/*-----------------------------------------------------------------------+
* set TX Buffer busy, and send it
*-----------------------------------------------------------------------*/
hw_p->tx[hw_p->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) == hw_p->tx_slot)
hw_p->tx[hw_p->tx_slot].ctrl |= MAL_TX_CTRL_WRAP;
hw_p->tx[hw_p->tx_slot].data_len = (short) len;
hw_p->tx[hw_p->tx_slot].ctrl |= MAL_TX_CTRL_READY;
__asm__ volatile ("eieio");
out32 (EMAC_TXM0 + hw_p->hw_addr,
in32 (EMAC_TXM0 + hw_p->hw_addr) | EMAC_TXM0_GNP0);
#ifdef INFO_405_ENET
hw_p->stats.pkts_tx++;
#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 + hw_p->hw_addr);
/* 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)
int enetInt (struct eth_device *dev)
{
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;
EMAC_405_HW_PST hw_p;
/*
* Because the mal is generic, we need to get the current
* eth device
*/
#if defined(CONFIG_NET_MULTI)
dev = eth_get_dev();
#else
dev = emac0_dev;
#endif
hw_p = dev->priv;
/* 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 (dev, 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 + hw_p->hw_addr);
if ((hw_p->emac_ier & emac_isr) != 0) {
emac_err (dev, emac_isr);
serviced = 1;
rc = 0;
}
}
if ((hw_p->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 >> hw_p->devnum)) != 0) { /* call emac routine for channel 0 */
/* clear EOB
mtdcr(malrxeobisr, mal_rx_eob); */
enet_rcv (dev, 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 */
int enetInt (struct eth_device *dev)
{
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;
EMAC_405_HW_PST hw_p;
/*
* Because the mal is generic, we need to get the current
* eth device
*/
#if defined(CONFIG_NET_MULTI)
dev = eth_get_dev();
#else
dev = emac0_dev;
#endif
hw_p = dev->priv;
/* 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 (dev, mal_isr, my_uicmsr, MAL_UIC_DEF, MAL_UIC_ERR);
serviced = 1;
rc = 0;
}
}
/* port by port dispatch of emac interrupts */
if ((SEL_UIC_DEF(hw_p->devnum) & my_uicmsr) != 0) { /* look for EMAC errors */
emac_isr = in32 (EMAC_ISR + hw_p->hw_addr);
if ((hw_p->emac_ier & emac_isr) != 0) {
emac_err (dev, emac_isr);
serviced = 1;
rc = 0;
}
}
if (((hw_p->emac_ier & emac_isr) != 0) || ((MAL_UIC_ERR & my_uicmsr) != 0)) {
mtdcr (uicsr, MAL_UIC_DEF | SEL_UIC_DEF(hw_p->devnum)); /* Clear */
return (rc); /* we had errors so get out */
}
/* handle MAX TX EOB interrupt from a tx */
if (my_uicmsr & UIC_MAL_TXEOB) {
mal_rx_eob = mfdcr (maltxeobisr);
mtdcr (maltxeobisr, mal_rx_eob);
mtdcr (uicsr, UIC_MAL_TXEOB);
}
/* handle MAL RX EOB interupt from a receive */
/* check for EOB on valid channels */
if (my_uicmsr & UIC_MAL_RXEOB)
{
mal_rx_eob = mfdcr (malrxeobisr);
if ((mal_rx_eob & (0x80000000 >> hw_p->devnum)) != 0) { /* call emac routine for channel x */
/* clear EOB
mtdcr(malrxeobisr, mal_rx_eob); */
enet_rcv (dev, emac_isr);
/* indicate that we serviced an interrupt */
serviced = 1;
rc = 0;
}
}
mtdcr (uicsr, MAL_UIC_DEF|EMAC_UIC_DEF|EMAC_UIC_DEF1); /* Clear */
}
while (serviced);
return (rc);
}
#endif
/*-----------------------------------------------------------------------------+
* MAL Error Routine
*-----------------------------------------------------------------------------*/
static void mal_err (struct eth_device *dev, unsigned long isr,
unsigned long uic, unsigned long maldef,
unsigned long mal_errr)
{
EMAC_405_HW_PST hw_p = dev->priv;
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);
#endif
eth_init (hw_p->bis); /* start again... */
}
/*-----------------------------------------------------------------------------+
* EMAC Error Routine
*-----------------------------------------------------------------------------*/
static void emac_err (struct eth_device *dev, unsigned long isr)
{
EMAC_405_HW_PST hw_p = dev->priv;
printf ("EMAC%d error occured.... ISR = %lx\n", hw_p->devnum, isr);
out32 (EMAC_ISR + hw_p->hw_addr, isr);
}
/*-----------------------------------------------------------------------------+
* enet_rcv() handles the ethernet receive data
*-----------------------------------------------------------------------------*/
static void enet_rcv (struct eth_device *dev, unsigned long malisr)
{
struct enet_frame *ef_ptr;
unsigned long data_len;
unsigned long rx_eob_isr;
EMAC_405_HW_PST hw_p = dev->priv;
int handled = 0;
int i;
int loop_count = 0;
rx_eob_isr = mfdcr (malrxeobisr);
if ((0x80000000 >> hw_p->devnum) & rx_eob_isr) {
/* clear EOB */
mtdcr (malrxeobisr, rx_eob_isr);
/* EMAC RX done */
while (1) { /* do all */
i = hw_p->rx_slot;
if ((MAL_RX_CTRL_EMPTY & hw_p->rx[i].ctrl)
|| (loop_count >= NUM_RX_BUFF))
break;
loop_count++;
hw_p->rx_slot++;
if (NUM_RX_BUFF == hw_p->rx_slot)
hw_p->rx_slot = 0;
handled++;
data_len = (unsigned long) hw_p->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 & hw_p->rx[i].ctrl) { /* Check Errors */
data_len = 0;
hw_p->stats.rx_err_log[hw_p->
rx_err_index]
= hw_p->rx[i].ctrl;
hw_p->rx_err_index++;
if (hw_p->rx_err_index ==
MAX_ERR_LOG)
hw_p->rx_err_index =
0;
} /* emac_erros */
} /* data_len < max mtu */
} /* if data_len */
if (!data_len) { /* no data */
hw_p->rx[i].ctrl |= MAL_RX_CTRL_EMPTY; /* Free Recv Buffer */
hw_p->stats.data_len_err++; /* Error at Rx */
}
/* !data_len */
/* AS.HARNOIS */
/* Check if user has already eaten buffer */
/* if not => ERROR */
else if (hw_p->rx_ready[hw_p->rx_i_index] != -1) {
if (hw_p->is_receiving)
printf ("ERROR : Receive buffers are full!\n");
break;
} else {
hw_p->stats.rx_frames++;
hw_p->stats.rx += data_len;
ef_ptr = (struct enet_frame *) hw_p->rx[i].
data_ptr;
#ifdef INFO_405_ENET
hw_p->stats.pkts_rx++;
#endif
/* AS.HARNOIS
* use ring buffer
*/
hw_p->rx_ready[hw_p->rx_i_index] = i;
hw_p->rx_i_index++;
if (NUM_RX_BUFF == hw_p->rx_i_index)
hw_p->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;
EMAC_405_HW_PST hw_p = dev->priv;
hw_p->is_receiving = 1; /* tell driver */
for (;;) {
/* AS.HARNOIS
* use ring buffer and
* get index from rx buffer desciptor queue
*/
user_index = hw_p->rx_ready[hw_p->rx_u_index];
if (user_index == -1) {
length = -1;
break; /* nothing received - leave for() loop */
}
msr = mfmsr ();
mtmsr (msr & ~(MSR_EE));
length = hw_p->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 */
hw_p->rx[user_index].ctrl |= MAL_RX_CTRL_EMPTY;
/* Free rx buffer descriptor queue */
hw_p->rx_ready[hw_p->rx_u_index] = -1;
hw_p->rx_u_index++;
if (NUM_RX_BUFF == hw_p->rx_u_index)
hw_p->rx_u_index = 0;
#ifdef INFO_405_ENET
hw_p->stats.pkts_handled++;
#endif
mtmsr (msr); /* Enable IRQ's */
}
hw_p->is_receiving = 0; /* tell driver */
return length;
}
static int virgin = 0;
int ppc_4xx_eth_initialize (bd_t * bis)
{
struct eth_device *dev;
int eth_num = 0;
EMAC_405_HW_PST hw = NULL;
for (eth_num = 0; eth_num < EMAC_NUM_DEV; eth_num++) {
/* Allocate device structure */
dev = (struct eth_device *) malloc (sizeof (*dev));
if (dev == NULL) {
printf ("ppc_405x_eth_initialize: "
"Cannot allocate eth_device %d\n", eth_num);
return (-1);
}
memset(dev, 0, sizeof(*dev));
/* Allocate our private use data */
hw = (EMAC_405_HW_PST) malloc (sizeof (*hw));
if (hw == NULL) {
printf ("ppc_405x_eth_initialize: "
"Cannot allocate private hw data for eth_device %d",
eth_num);
free (dev);
return (-1);
}
memset(hw, 0, sizeof(*hw));
switch (eth_num) {
case 0:
hw->hw_addr = 0;
memcpy (dev->enetaddr, bis->bi_enetaddr, 6);
break;
#if defined(CONFIG_NET_MULTI)
case 1:
hw->hw_addr = 0x100;
memcpy (dev->enetaddr, bis->bi_enet1addr, 6);
break;
#endif
default:
hw->hw_addr = 0;
memcpy (dev->enetaddr, bis->bi_enetaddr, 6);
break;
}
hw->devnum = eth_num;
hw->print_speed = 1;
sprintf (dev->name, "ppc_405x_eth%d", eth_num);
dev->priv = (void *) hw;
dev->init = ppc_4xx_eth_init;
dev->halt = ppc_4xx_eth_halt;
dev->send = ppc_4xx_eth_send;
dev->recv = ppc_4xx_eth_rx;
if (0 == virgin) {
/* 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);
/* install MAL interrupt handler */
irq_install_handler (VECNUM_MS,
(interrupt_handler_t *) enetInt,
dev);
irq_install_handler (VECNUM_MTE,
(interrupt_handler_t *) enetInt,
dev);
irq_install_handler (VECNUM_MRE,
(interrupt_handler_t *) enetInt,
dev);
irq_install_handler (VECNUM_TXDE,
(interrupt_handler_t *) enetInt,
dev);
irq_install_handler (VECNUM_RXDE,
(interrupt_handler_t *) enetInt,
dev);
virgin = 1;
}
#if defined(CONFIG_NET_MULTI)
eth_register (dev);
#else
emac0_dev = dev;
#endif
} /* end for each supported device */
return (1);
}
#if !defined(CONFIG_NET_MULTI)
void eth_halt (void) {
if (emac0_dev) {
ppc_4xx_eth_halt(emac0_dev);
free(emac0_dev);
emac0_dev = NULL;
}
}
int eth_init (bd_t *bis)
{
ppc_4xx_eth_initialize(bis);
return(ppc_4xx_eth_init(emac0_dev, bis));
}
int eth_send(volatile void *packet, int length)
{
return (ppc_4xx_eth_send(emac0_dev, packet, length));
}
int eth_rx(void)
{
return (ppc_4xx_eth_rx(emac0_dev));
}
#endif
#endif /* CONFIG_405 */
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