+++ /dev/null
-/*
- * File: scc.c
- * Description:
- * Basic ET HW initialization and packet RX/TX routines
- *
- * NOTE <<<IMPORTANT: PLEASE READ>>>:
- * Do not cache Rx/Tx buffers!
- */
-
-/*
- * MPC823 <-> MC68160 Connections:
- *
- * Setup MPC823 to work with MC68160 Enhanced Ethernet
- * Serial Tranceiver as follows:
- *
- * MPC823 Signal MC68160 Comments
- * ------ ------ ------- --------
- * PA-12 ETHTX --------> TX Eth. Port Transmit Data
- * PB-18 E_TENA --------> TENA Eth. Transmit Port Enable
- * PA-5 ETHTCK <-------- TCLK Eth. Port Transmit Clock
- * PA-13 ETHRX <-------- RX Eth. Port Receive Data
- * PC-8 E_RENA <-------- RENA Eth. Receive Enable
- * PA-6 ETHRCK <-------- RCLK Eth. Port Receive Clock
- * PC-9 E_CLSN <-------- CLSN Eth. Port Collision Indication
- *
- * FADS Board Signal MC68160 Comments
- * ----------------- ------- --------
- * (BCSR1) ETHEN* --------> CS2 Eth. Port Enable
- * (BSCR4) TPSQEL* --------> TPSQEL Twisted Pair Signal Quality Error Test Enable
- * (BCSR4) TPFLDL* --------> TPFLDL Twisted Pair Full-Duplex
- * (BCSR4) ETHLOOP --------> LOOP Eth. Port Diagnostic Loop-Back
- *
- */
-
-#include <common.h>
-#include <malloc.h>
-#include <commproc.h>
-#include <net.h>
-#include <command.h>
-
-#if defined(CONFIG_CMD_NET) && defined(SCC_ENET)
-
-/* Ethernet Transmit and Receive Buffers */
-#define DBUF_LENGTH 1520
-
-#define TX_BUF_CNT 2
-
-#define TOUT_LOOP 10000 /* 10 ms to have a packet sent */
-
-static char txbuf[DBUF_LENGTH];
-
-static uint rxIdx; /* index of the current RX buffer */
-static uint txIdx; /* index of the current TX buffer */
-
-/*
- * SCC Ethernet Tx and Rx buffer descriptors allocated at the
- * immr->udata_bd address on Dual-Port RAM
- * Provide for Double Buffering
- */
-
-typedef volatile struct CommonBufferDescriptor {
- cbd_t rxbd[PKTBUFSRX]; /* Rx BD */
- cbd_t txbd[TX_BUF_CNT]; /* Tx BD */
-} RTXBD;
-
-static RTXBD *rtx;
-
-static int scc_send(struct eth_device* dev, volatile void *packet, int length);
-static int scc_recv(struct eth_device* dev);
-static int scc_init (struct eth_device* dev, bd_t * bd);
-static void scc_halt(struct eth_device* dev);
-
-int scc_initialize(bd_t *bis)
-{
- struct eth_device* dev;
-
- dev = (struct eth_device*) malloc(sizeof *dev);
- memset(dev, 0, sizeof *dev);
-
- sprintf(dev->name, "SCC ETHERNET");
- dev->iobase = 0;
- dev->priv = 0;
- dev->init = scc_init;
- dev->halt = scc_halt;
- dev->send = scc_send;
- dev->recv = scc_recv;
-
- eth_register(dev);
-
- return 1;
-}
-
-static int scc_send(struct eth_device* dev, volatile void *packet, int length)
-{
- int i, j=0;
-#if 0
- volatile char *in, *out;
-#endif
-
- /* section 16.9.23.3
- * Wait for ready
- */
-#if 0
- while (rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_READY);
- out = (char *)(rtx->txbd[txIdx].cbd_bufaddr);
- in = packet;
- for(i = 0; i < length; i++) {
- *out++ = *in++;
- }
- rtx->txbd[txIdx].cbd_datlen = length;
- rtx->txbd[txIdx].cbd_sc |= (BD_ENET_TX_READY | BD_ENET_TX_LAST);
- while (rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_READY) j++;
-
-#ifdef ET_DEBUG
- printf("cycles: %d status: %x\n", j, rtx->txbd[txIdx].cbd_sc);
-#endif
- i = (rtx->txbd[txIdx++].cbd_sc & BD_ENET_TX_STATS) /* return only status bits */;
-
- /* wrap around buffer index when necessary */
- if (txIdx >= TX_BUF_CNT) txIdx = 0;
-#endif
-
- while ((rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_READY) && (j<TOUT_LOOP)) {
- udelay (1); /* will also trigger Wd if needed */
- j++;
- }
- if (j>=TOUT_LOOP) printf("TX not ready\n");
- rtx->txbd[txIdx].cbd_bufaddr = (uint)packet;
- rtx->txbd[txIdx].cbd_datlen = length;
- rtx->txbd[txIdx].cbd_sc |= (BD_ENET_TX_READY | BD_ENET_TX_LAST |BD_ENET_TX_WRAP);
- while ((rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_READY) && (j<TOUT_LOOP)) {
- udelay (1); /* will also trigger Wd if needed */
- j++;
- }
- if (j>=TOUT_LOOP) printf("TX timeout\n");
-#ifdef ET_DEBUG
- printf("cycles: %d status: %x\n", j, rtx->txbd[txIdx].cbd_sc);
-#endif
- i = (rtx->txbd[txIdx].cbd_sc & BD_ENET_TX_STATS) /* return only status bits */;
- return i;
-}
-
-static int scc_recv (struct eth_device *dev)
-{
- int length;
-
- for (;;) {
- /* section 16.9.23.2 */
- if (rtx->rxbd[rxIdx].cbd_sc & BD_ENET_RX_EMPTY) {
- length = -1;
- break; /* nothing received - leave for() loop */
- }
-
- length = rtx->rxbd[rxIdx].cbd_datlen;
-
- if (rtx->rxbd[rxIdx].cbd_sc & 0x003f) {
-#ifdef ET_DEBUG
- printf ("err: %x\n", rtx->rxbd[rxIdx].cbd_sc);
-#endif
- } else {
- /* Pass the packet up to the protocol layers. */
- NetReceive (NetRxPackets[rxIdx], length - 4);
- }
-
-
- /* Give the buffer back to the SCC. */
- rtx->rxbd[rxIdx].cbd_datlen = 0;
-
- /* wrap around buffer index when necessary */
- if ((rxIdx + 1) >= PKTBUFSRX) {
- rtx->rxbd[PKTBUFSRX - 1].cbd_sc =
- (BD_ENET_RX_WRAP | BD_ENET_RX_EMPTY);
- rxIdx = 0;
- } else {
- rtx->rxbd[rxIdx].cbd_sc = BD_ENET_RX_EMPTY;
- rxIdx++;
- }
- }
- return length;
-}
-
-/**************************************************************
- *
- * SCC Ethernet Initialization Routine
- *
- *************************************************************/
-
-static int scc_init (struct eth_device *dev, bd_t * bis)
-{
-
- int i;
- scc_enet_t *pram_ptr;
-
- volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
-
-#if defined(CONFIG_LWMON)
- reset_phy();
-#endif
-
-#ifdef CONFIG_FADS
-#if defined(CONFIG_MPC86xADS) || defined(CONFIG_MPC860T)
- /* The MPC86xADS/FADS860T don't use the MODEM_EN or DATA_VOICE signals. */
- *((uint *) BCSR4) &= ~BCSR4_ETHLOOP;
- *((uint *) BCSR4) |= BCSR4_TFPLDL | BCSR4_TPSQEL;
- *((uint *) BCSR1) &= ~BCSR1_ETHEN;
-#else
- *((uint *) BCSR4) &= ~(BCSR4_ETHLOOP | BCSR4_MODEM_EN);
- *((uint *) BCSR4) |= BCSR4_TFPLDL | BCSR4_TPSQEL | BCSR4_DATA_VOICE;
- *((uint *) BCSR1) &= ~BCSR1_ETHEN;
-#endif
-#endif
-
- pram_ptr = (scc_enet_t *) & (immr->im_cpm.cp_dparam[PROFF_ENET]);
-
- rxIdx = 0;
- txIdx = 0;
-
- if (!rtx) {
-#ifdef CONFIG_SYS_ALLOC_DPRAM
- rtx = (RTXBD *) (immr->im_cpm.cp_dpmem +
- dpram_alloc_align (sizeof (RTXBD), 8));
-#else
- rtx = (RTXBD *) (immr->im_cpm.cp_dpmem + CPM_SCC_BASE);
-#endif
- }
-
-#if (defined(PA_ENET_RXD) && defined(PA_ENET_TXD))
- /* Configure port A pins for Txd and Rxd.
- */
- immr->im_ioport.iop_papar |= (PA_ENET_RXD | PA_ENET_TXD);
- immr->im_ioport.iop_padir &= ~(PA_ENET_RXD | PA_ENET_TXD);
- immr->im_ioport.iop_paodr &= ~PA_ENET_TXD;
-#elif (defined(PB_ENET_RXD) && defined(PB_ENET_TXD))
- /* Configure port B pins for Txd and Rxd.
- */
- immr->im_cpm.cp_pbpar |= (PB_ENET_RXD | PB_ENET_TXD);
- immr->im_cpm.cp_pbdir &= ~(PB_ENET_RXD | PB_ENET_TXD);
- immr->im_cpm.cp_pbodr &= ~PB_ENET_TXD;
-#else
-#error Configuration Error: exactly ONE of PA_ENET_[RT]XD, PB_ENET_[RT]XD must be defined
-#endif
-
-#if defined(PC_ENET_LBK)
- /* Configure port C pins to disable External Loopback
- */
- immr->im_ioport.iop_pcpar &= ~PC_ENET_LBK;
- immr->im_ioport.iop_pcdir |= PC_ENET_LBK;
- immr->im_ioport.iop_pcso &= ~PC_ENET_LBK;
- immr->im_ioport.iop_pcdat &= ~PC_ENET_LBK; /* Disable Loopback */
-#endif /* PC_ENET_LBK */
-
- /* Configure port C pins to enable CLSN and RENA.
- */
- immr->im_ioport.iop_pcpar &= ~(PC_ENET_CLSN | PC_ENET_RENA);
- immr->im_ioport.iop_pcdir &= ~(PC_ENET_CLSN | PC_ENET_RENA);
- immr->im_ioport.iop_pcso |= (PC_ENET_CLSN | PC_ENET_RENA);
-
- /* Configure port A for TCLK and RCLK.
- */
- immr->im_ioport.iop_papar |= (PA_ENET_TCLK | PA_ENET_RCLK);
- immr->im_ioport.iop_padir &= ~(PA_ENET_TCLK | PA_ENET_RCLK);
-
- /*
- * Configure Serial Interface clock routing -- see section 16.7.5.3
- * First, clear all SCC bits to zero, then set the ones we want.
- */
-
- immr->im_cpm.cp_sicr &= ~SICR_ENET_MASK;
- immr->im_cpm.cp_sicr |= SICR_ENET_CLKRT;
-
-
- /*
- * Initialize SDCR -- see section 16.9.23.7
- * SDMA configuration register
- */
- immr->im_siu_conf.sc_sdcr = 0x01;
-
-
- /*
- * Setup SCC Ethernet Parameter RAM
- */
-
- pram_ptr->sen_genscc.scc_rfcr = 0x18; /* Normal Operation and Mot byte ordering */
- pram_ptr->sen_genscc.scc_tfcr = 0x18; /* Mot byte ordering, Normal access */
-
- pram_ptr->sen_genscc.scc_mrblr = DBUF_LENGTH; /* max. ET package len 1520 */
-
- pram_ptr->sen_genscc.scc_rbase = (unsigned int) (&rtx->rxbd[0]); /* Set RXBD tbl start at Dual Port */
- pram_ptr->sen_genscc.scc_tbase = (unsigned int) (&rtx->txbd[0]); /* Set TXBD tbl start at Dual Port */
-
- /*
- * Setup Receiver Buffer Descriptors (13.14.24.18)
- * Settings:
- * Empty, Wrap
- */
-
- for (i = 0; i < PKTBUFSRX; i++) {
- rtx->rxbd[i].cbd_sc = BD_ENET_RX_EMPTY;
- rtx->rxbd[i].cbd_datlen = 0; /* Reset */
- rtx->rxbd[i].cbd_bufaddr = (uint) NetRxPackets[i];
- }
-
- rtx->rxbd[PKTBUFSRX - 1].cbd_sc |= BD_ENET_RX_WRAP;
-
- /*
- * Setup Ethernet Transmitter Buffer Descriptors (13.14.24.19)
- * Settings:
- * Add PADs to Short FRAMES, Wrap, Last, Tx CRC
- */
-
- for (i = 0; i < TX_BUF_CNT; i++) {
- rtx->txbd[i].cbd_sc =
- (BD_ENET_TX_PAD | BD_ENET_TX_LAST | BD_ENET_TX_TC);
- rtx->txbd[i].cbd_datlen = 0; /* Reset */
- rtx->txbd[i].cbd_bufaddr = (uint) (&txbuf[0]);
- }
-
- rtx->txbd[TX_BUF_CNT - 1].cbd_sc |= BD_ENET_TX_WRAP;
-
- /*
- * Enter Command: Initialize Rx Params for SCC
- */
-
- do { /* Spin until ready to issue command */
- __asm__ ("eieio");
- } while (immr->im_cpm.cp_cpcr & CPM_CR_FLG);
- /* Issue command */
- immr->im_cpm.cp_cpcr =
- ((CPM_CR_INIT_RX << 8) | (CPM_CR_ENET << 4) | CPM_CR_FLG);
- do { /* Spin until command processed */
- __asm__ ("eieio");
- } while (immr->im_cpm.cp_cpcr & CPM_CR_FLG);
-
- /*
- * Ethernet Specific Parameter RAM
- * see table 13-16, pg. 660,
- * pg. 681 (example with suggested settings)
- */
-
- pram_ptr->sen_cpres = ~(0x0); /* Preset CRC */
- pram_ptr->sen_cmask = 0xdebb20e3; /* Constant Mask for CRC */
- pram_ptr->sen_crcec = 0x0; /* Error Counter CRC (unused) */
- pram_ptr->sen_alec = 0x0; /* Alignment Error Counter (unused) */
- pram_ptr->sen_disfc = 0x0; /* Discard Frame Counter (unused) */
- pram_ptr->sen_pads = 0x8888; /* Short Frame PAD Characters */
-
- pram_ptr->sen_retlim = 15; /* Retry Limit Threshold */
- pram_ptr->sen_maxflr = 1518; /* MAX Frame Length Register */
- pram_ptr->sen_minflr = 64; /* MIN Frame Length Register */
-
- pram_ptr->sen_maxd1 = DBUF_LENGTH; /* MAX DMA1 Length Register */
- pram_ptr->sen_maxd2 = DBUF_LENGTH; /* MAX DMA2 Length Register */
-
- pram_ptr->sen_gaddr1 = 0x0; /* Group Address Filter 1 (unused) */
- pram_ptr->sen_gaddr2 = 0x0; /* Group Address Filter 2 (unused) */
- pram_ptr->sen_gaddr3 = 0x0; /* Group Address Filter 3 (unused) */
- pram_ptr->sen_gaddr4 = 0x0; /* Group Address Filter 4 (unused) */
-
-#define ea eth_get_dev()->enetaddr
- pram_ptr->sen_paddrh = (ea[5] << 8) + ea[4];
- pram_ptr->sen_paddrm = (ea[3] << 8) + ea[2];
- pram_ptr->sen_paddrl = (ea[1] << 8) + ea[0];
-#undef ea
-
- pram_ptr->sen_pper = 0x0; /* Persistence (unused) */
- pram_ptr->sen_iaddr1 = 0x0; /* Individual Address Filter 1 (unused) */
- pram_ptr->sen_iaddr2 = 0x0; /* Individual Address Filter 2 (unused) */
- pram_ptr->sen_iaddr3 = 0x0; /* Individual Address Filter 3 (unused) */
- pram_ptr->sen_iaddr4 = 0x0; /* Individual Address Filter 4 (unused) */
- pram_ptr->sen_taddrh = 0x0; /* Tmp Address (MSB) (unused) */
- pram_ptr->sen_taddrm = 0x0; /* Tmp Address (unused) */
- pram_ptr->sen_taddrl = 0x0; /* Tmp Address (LSB) (unused) */
-
- /*
- * Enter Command: Initialize Tx Params for SCC
- */
-
- do { /* Spin until ready to issue command */
- __asm__ ("eieio");
- } while (immr->im_cpm.cp_cpcr & CPM_CR_FLG);
- /* Issue command */
- immr->im_cpm.cp_cpcr =
- ((CPM_CR_INIT_TX << 8) | (CPM_CR_ENET << 4) | CPM_CR_FLG);
- do { /* Spin until command processed */
- __asm__ ("eieio");
- } while (immr->im_cpm.cp_cpcr & CPM_CR_FLG);
-
- /*
- * Mask all Events in SCCM - we use polling mode
- */
- immr->im_cpm.cp_scc[SCC_ENET].scc_sccm = 0;
-
- /*
- * Clear Events in SCCE -- Clear bits by writing 1's
- */
-
- immr->im_cpm.cp_scc[SCC_ENET].scc_scce = ~(0x0);
-
-
- /*
- * Initialize GSMR High 32-Bits
- * Settings: Normal Mode
- */
-
- immr->im_cpm.cp_scc[SCC_ENET].scc_gsmrh = 0;
-
- /*
- * Initialize GSMR Low 32-Bits, but do not Enable Transmit/Receive
- * Settings:
- * TCI = Invert
- * TPL = 48 bits
- * TPP = Repeating 10's
- * MODE = Ethernet
- */
-
- immr->im_cpm.cp_scc[SCC_ENET].scc_gsmrl = (SCC_GSMRL_TCI |
- SCC_GSMRL_TPL_48 |
- SCC_GSMRL_TPP_10 |
- SCC_GSMRL_MODE_ENET);
-
- /*
- * Initialize the DSR -- see section 13.14.4 (pg. 513) v0.4
- */
-
- immr->im_cpm.cp_scc[SCC_ENET].scc_dsr = 0xd555;
-
- /*
- * Initialize the PSMR
- * Settings:
- * CRC = 32-Bit CCITT
- * NIB = Begin searching for SFD 22 bits after RENA
- * FDE = Full Duplex Enable
- * LPB = Loopback Enable (Needed when FDE is set)
- * BRO = Reject broadcast packets
- * PROMISCOUS = Catch all packets regardless of dest. MAC adress
- */
- immr->im_cpm.cp_scc[SCC_ENET].scc_psmr = SCC_PSMR_ENCRC |
- SCC_PSMR_NIB22 |
-#if defined(CONFIG_SCC_ENET_FULL_DUPLEX)
- SCC_PSMR_FDE | SCC_PSMR_LPB |
-#endif
-#if defined(CONFIG_SCC_ENET_NO_BROADCAST)
- SCC_PSMR_BRO |
-#endif
-#if defined(CONFIG_SCC_ENET_PROMISCOUS)
- SCC_PSMR_PRO |
-#endif
- 0;
-
- /*
- * Configure Ethernet TENA Signal
- */
-
-#if (defined(PC_ENET_TENA) && !defined(PB_ENET_TENA))
- immr->im_ioport.iop_pcpar |= PC_ENET_TENA;
- immr->im_ioport.iop_pcdir &= ~PC_ENET_TENA;
-#elif (defined(PB_ENET_TENA) && !defined(PC_ENET_TENA))
- immr->im_cpm.cp_pbpar |= PB_ENET_TENA;
- immr->im_cpm.cp_pbdir |= PB_ENET_TENA;
-#else
-#error Configuration Error: exactly ONE of PB_ENET_TENA, PC_ENET_TENA must be defined
-#endif
-
-#if defined(CONFIG_ADS) && defined(CONFIG_MPC860)
- /*
- * Port C is used to control the PHY,MC68160.
- */
- immr->im_ioport.iop_pcdir |=
- (PC_ENET_ETHLOOP | PC_ENET_TPFLDL | PC_ENET_TPSQEL);
-
- immr->im_ioport.iop_pcdat |= PC_ENET_TPFLDL;
- immr->im_ioport.iop_pcdat &= ~(PC_ENET_ETHLOOP | PC_ENET_TPSQEL);
- *((uint *) BCSR1) &= ~BCSR1_ETHEN;
-#endif /* MPC860ADS */
-
-#if defined(CONFIG_AMX860)
- /*
- * Port B is used to control the PHY,MC68160.
- */
- immr->im_cpm.cp_pbdir |=
- (PB_ENET_ETHLOOP | PB_ENET_TPFLDL | PB_ENET_TPSQEL);
-
- immr->im_cpm.cp_pbdat |= PB_ENET_TPFLDL;
- immr->im_cpm.cp_pbdat &= ~(PB_ENET_ETHLOOP | PB_ENET_TPSQEL);
-
- immr->im_ioport.iop_pddir |= PD_ENET_ETH_EN;
- immr->im_ioport.iop_pddat &= ~PD_ENET_ETH_EN;
-#endif /* AMX860 */
-
-#ifdef CONFIG_RPXCLASSIC
- *((uchar *) BCSR0) &= ~BCSR0_ETHLPBK;
- *((uchar *) BCSR0) |= (BCSR0_ETHEN | BCSR0_COLTEST | BCSR0_FULLDPLX);
-#endif
-
-#ifdef CONFIG_RPXLITE
- *((uchar *) BCSR0) |= BCSR0_ETHEN;
-#endif
-
-#if defined(CONFIG_QS860T)
- /*
- * PB27=FDE-, set output low for full duplex
- * PB26=Link Test Enable, normally high output
- */
- immr->im_cpm.cp_pbdir |= 0x00000030;
- immr->im_cpm.cp_pbdat |= 0x00000020;
- immr->im_cpm.cp_pbdat &= ~0x00000010;
-#endif /* QS860T */
-
-#ifdef CONFIG_MBX
- board_ether_init ();
-#endif
-
-#if defined(CONFIG_NETVIA)
-#if defined(PA_ENET_PDN)
- immr->im_ioport.iop_papar &= ~PA_ENET_PDN;
- immr->im_ioport.iop_padir |= PA_ENET_PDN;
- immr->im_ioport.iop_padat |= PA_ENET_PDN;
-#elif defined(PB_ENET_PDN)
- immr->im_cpm.cp_pbpar &= ~PB_ENET_PDN;
- immr->im_cpm.cp_pbdir |= PB_ENET_PDN;
- immr->im_cpm.cp_pbdat |= PB_ENET_PDN;
-#elif defined(PC_ENET_PDN)
- immr->im_ioport.iop_pcpar &= ~PC_ENET_PDN;
- immr->im_ioport.iop_pcdir |= PC_ENET_PDN;
- immr->im_ioport.iop_pcdat |= PC_ENET_PDN;
-#elif defined(PD_ENET_PDN)
- immr->im_ioport.iop_pdpar &= ~PD_ENET_PDN;
- immr->im_ioport.iop_pddir |= PD_ENET_PDN;
- immr->im_ioport.iop_pddat |= PD_ENET_PDN;
-#endif
-#endif
-
- /*
- * Set the ENT/ENR bits in the GSMR Low -- Enable Transmit/Receive
- */
-
- immr->im_cpm.cp_scc[SCC_ENET].scc_gsmrl |=
- (SCC_GSMRL_ENR | SCC_GSMRL_ENT);
-
- /*
- * Work around transmit problem with first eth packet
- */
-#if defined (CONFIG_FADS)
- udelay (10000); /* wait 10 ms */
-#elif defined (CONFIG_AMX860) || defined(CONFIG_RPXCLASSIC)
- udelay (100000); /* wait 100 ms */
-#endif
-
- return 1;
-}
-
-
-static void scc_halt (struct eth_device *dev)
-{
- volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
-
- immr->im_cpm.cp_scc[SCC_ENET].scc_gsmrl &=
- ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT);
-
- immr->im_ioport.iop_pcso &= ~(PC_ENET_CLSN | PC_ENET_RENA);
-}
-
-#if 0
-void restart (void)
-{
- volatile immap_t *immr = (immap_t *) CONFIG_SYS_IMMR;
-
- immr->im_cpm.cp_scc[SCC_ENET].scc_gsmrl |=
- (SCC_GSMRL_ENR | SCC_GSMRL_ENT);
-}
-#endif
-#endif
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