| /* |
| * 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, 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"); |
| 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, 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; |
| |
| 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_ethaddr() |
| 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 |
| |
| /* |
| * 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); |
| |
| 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 |