diff options
Diffstat (limited to 'drivers/inca-ip_sw.c')
| -rw-r--r-- | drivers/inca-ip_sw.c | 646 |
1 files changed, 646 insertions, 0 deletions
diff --git a/drivers/inca-ip_sw.c b/drivers/inca-ip_sw.c index e69de29..3a23f4d 100644 --- a/drivers/inca-ip_sw.c +++ b/drivers/inca-ip_sw.c @@ -0,0 +1,646 @@ +/* + * INCA-IP internal switch ethernet driver. + * + * (C) Copyright 2003 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + + +#include <common.h> + +#if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(CONFIG_NET_MULTI) \ + && defined(CONFIG_INCA_IP_SWITCH) + +#include <malloc.h> +#include <net.h> +#include <asm/inca-ip.h> +#include <asm/addrspace.h> + + +#define NUM_RX_DESC PKTBUFSRX +#define NUM_TX_DESC 3 +#define TOUT_LOOP 1000000 + + +#define DELAY udelay(10000) + +#define DMA_WRITE_REG(reg, value) *((volatile u32 *)reg) = (u32)value; +#define DMA_READ_REG(reg, value) value = (u32)*((volatile u32*)reg) +#define SW_WRITE_REG(reg, value) \ + *((volatile u32*)reg) = (u32)value;\ + DELAY;\ + *((volatile u32*)reg) = (u32)value; + +#define SW_READ_REG(reg, value) \ + value = (u32)*((volatile u32*)reg);\ + DELAY;\ + value = (u32)*((volatile u32*)reg); + +#define INCA_DMA_TX_POLLING_TIME 0x07 +#define INCA_DMA_RX_POLLING_TIME 0x07 + +#define INCA_DMA_TX_HOLD 0x80000000 +#define INCA_DMA_TX_EOP 0x40000000 +#define INCA_DMA_TX_SOP 0x20000000 +#define INCA_DMA_TX_ICPT 0x10000000 +#define INCA_DMA_TX_IEOP 0x08000000 + +#define INCA_DMA_RX_C 0x80000000 +#define INCA_DMA_RX_SOP 0x40000000 +#define INCA_DMA_RX_EOP 0x20000000 + + +typedef struct +{ + union + { + struct + { + volatile u32 HOLD :1; + volatile u32 ICpt :1; + volatile u32 IEop :1; + volatile u32 offset :3; + volatile u32 reserved0 :4; + volatile u32 NFB :22; + }field; + + volatile u32 word; + }params; + + volatile u32 nextRxDescPtr; + + volatile u32 RxDataPtr; + + union + { + struct + { + volatile u32 C :1; + volatile u32 Sop :1; + volatile u32 Eop :1; + volatile u32 reserved3 :12; + volatile u32 NBT :17; + }field; + + volatile u32 word; + }status; + +} inca_rx_descriptor_t; + + +typedef struct +{ + union + { + struct + { + volatile u32 HOLD :1; + volatile u32 Eop :1; + volatile u32 Sop :1; + volatile u32 ICpt :1; + volatile u32 IEop :1; + volatile u32 reserved0 :5; + volatile u32 NBA :22; + }field; + + volatile u32 word; + }params; + + volatile u32 nextTxDescPtr; + + volatile u32 TxDataPtr; + + volatile u32 C :1; + volatile u32 reserved3 :31; + +} inca_tx_descriptor_t; + + +static inca_rx_descriptor_t rx_ring[NUM_RX_DESC] __attribute__ ((aligned(16))); +static inca_tx_descriptor_t tx_ring[NUM_TX_DESC] __attribute__ ((aligned(16))); + +static int tx_new, rx_new, tx_hold, rx_hold; +static int tx_old_hold = -1; +static int initialized = 0; + + +static int inca_switch_init(struct eth_device *dev, bd_t * bis); +static int inca_switch_send(struct eth_device *dev, volatile void *packet, + int length); +static int inca_switch_recv(struct eth_device *dev); +static void inca_switch_halt(struct eth_device *dev); +static void inca_init_switch_chip(void); +static void inca_dma_init(void); + + + +int inca_switch_initialize(bd_t * bis) +{ + struct eth_device *dev; + +#if 0 + printf("Entered inca_switch_initialize()\n"); +#endif + + if (!(dev = (struct eth_device *) malloc (sizeof *dev))) + { + printf("Failed to allocate memory\n"); + return 0; + } + memset(dev, 0, sizeof(*dev)); + + inca_dma_init(); + + inca_init_switch_chip(); + + sprintf(dev->name, "INCA-IP Switch"); + dev->init = inca_switch_init; + dev->halt = inca_switch_halt; + dev->send = inca_switch_send; + dev->recv = inca_switch_recv; + + eth_register(dev); + +#if 0 + printf("Leaving inca_switch_initialize()\n"); +#endif + + return 1; +} + + +static int inca_switch_init(struct eth_device *dev, bd_t * bis) +{ + int i; + u32 v, regValue; + u16 wTmp; + +#if 0 + printf("Entering inca_switch_init()\n"); +#endif + + /* Set MAC address. + */ + wTmp = (u16)dev->enetaddr[0]; + regValue = (wTmp << 8) | dev->enetaddr[1]; + + SW_WRITE_REG(INCA_IP_Switch_PMAC_SA1, regValue); + + wTmp = (u16)dev->enetaddr[2]; + regValue = (wTmp << 8) | dev->enetaddr[3]; + regValue = regValue << 16; + wTmp = (u16)dev->enetaddr[4]; + regValue |= (wTmp<<8) | dev->enetaddr[5]; + + SW_WRITE_REG(INCA_IP_Switch_PMAC_SA2, regValue); + + /* Initialize the descriptor rings. + */ + for (i = 0; i < NUM_RX_DESC; i++) + { + inca_rx_descriptor_t * rx_desc = KSEG1ADDR(&rx_ring[i]); + memset(rx_desc, 0, sizeof(rx_ring[i])); + + /* Set maximum size of receive buffer. + */ + rx_desc->params.field.NFB = PKTSIZE_ALIGN; + + /* Set the offset of the receive buffer. Zero means + * that the offset mechanism is not used. + */ + rx_desc->params.field.offset = 0; + + /* Check if it is the last descriptor. + */ + if (i == (NUM_RX_DESC - 1)) + { + /* Let the last descriptor point to the first + * one. + */ + rx_desc->nextRxDescPtr = KSEG1ADDR((u32)rx_ring); + } + else + { + /* Set the address of the next descriptor. + */ + rx_desc->nextRxDescPtr = (u32)KSEG1ADDR(&rx_ring[i+1]); + } + + rx_desc->RxDataPtr = (u32)KSEG1ADDR(NetRxPackets[i]); + } + +#if 0 + printf("rx_ring = 0x%08X 0x%08X\n", (u32)rx_ring, (u32)&rx_ring[0]); + printf("tx_ring = 0x%08X 0x%08X\n", (u32)tx_ring, (u32)&tx_ring[0]); +#endif + + for (i = 0; i < NUM_TX_DESC; i++) + { + inca_tx_descriptor_t * tx_desc = KSEG1ADDR(&tx_ring[i]); + + memset(tx_desc, 0, sizeof(tx_ring[i])); + + tx_desc->params.word = 0; + tx_desc->params.field.HOLD = 1; + tx_desc->C = 1; + + /* Check if it is the last descriptor. + */ + if (i == (NUM_TX_DESC - 1)) + { + /* Let the last descriptor point to the + * first one. + */ + tx_desc->nextTxDescPtr = KSEG1ADDR((u32)tx_ring); + } + else + { + /* Set the address of the next descriptor. + */ + tx_desc->nextTxDescPtr = (u32)KSEG1ADDR(&tx_ring[i+1]); + } + } + + /* Initialize RxDMA. + */ + DMA_READ_REG(INCA_IP_DMA_DMA_RXISR, v); +#if 0 + printf("RX status = 0x%08X\n", v); +#endif + + /* Writing to the FRDA of CHANNEL. + */ + DMA_WRITE_REG(INCA_IP_DMA_DMA_RXFRDA0, (u32)rx_ring); + + /* Writing to the COMMAND REG. + */ + DMA_WRITE_REG(INCA_IP_DMA_DMA_RXCCR0, + INCA_IP_DMA_DMA_RXCCR0_INIT); + + /* Initialize TxDMA. + */ + DMA_READ_REG(INCA_IP_DMA_DMA_TXISR, v); +#if 0 + printf("TX status = 0x%08X\n", v); +#endif + + /* Writing to the FRDA of CHANNEL. + */ + DMA_WRITE_REG(INCA_IP_DMA_DMA_TXFRDA0, (u32)tx_ring); + + tx_new = rx_new = 0; + + tx_hold = NUM_TX_DESC - 1; + rx_hold = NUM_RX_DESC - 1; + +#if 0 + rx_ring[rx_hold].params.field.HOLD = 1; +#endif + /* enable spanning tree forwarding, enable the CPU port */ + /* ST_PT: + CPS (CPU port status) 0x3 (forwarding) + LPS (LAN port status) 0x3 (forwarding) + PPS (PC port status) 0x3 (forwarding) + */ + SW_WRITE_REG(INCA_IP_Switch_ST_PT,0x3f); + +#if 0 + printf("Leaving inca_switch_init()\n"); +#endif + + return 0; +} + + +static int inca_switch_send(struct eth_device *dev, volatile void *packet, + int length) +{ + int i; + int res = -1; + u32 command; + u32 regValue; + inca_tx_descriptor_t * tx_desc = KSEG1ADDR(&tx_ring[tx_new]); + +#if 0 + printf("Entered inca_switch_send()\n"); +#endif + + if (length <= 0) + { + printf ("%s: bad packet size: %d\n", dev->name, length); + goto Done; + } + + for(i = 0; tx_desc->C == 0; i++) + { + if (i >= TOUT_LOOP) + { + printf("%s: tx error buffer not ready\n", dev->name); + goto Done; + } + } + + if (tx_old_hold >= 0) + { + KSEG1ADDR(&tx_ring[tx_old_hold])->params.field.HOLD = 1; + } + tx_old_hold = tx_hold; + + tx_desc->params.word = + (INCA_DMA_TX_SOP | INCA_DMA_TX_EOP | INCA_DMA_TX_HOLD); + + tx_desc->C = 0; + tx_desc->TxDataPtr = (u32)packet; + tx_desc->params.field.NBA = length; + + KSEG1ADDR(&tx_ring[tx_hold])->params.field.HOLD = 0; + + tx_hold = tx_new; + tx_new = (tx_new + 1) % NUM_TX_DESC; + + + if (! initialized) + { + command = INCA_IP_DMA_DMA_TXCCR0_INIT; + initialized = 1; + } + else + { + command = INCA_IP_DMA_DMA_TXCCR0_HR; + } + + DMA_READ_REG(INCA_IP_DMA_DMA_TXCCR0, regValue); + regValue |= command; +#if 0 + printf("regValue = 0x%x\n", regValue); +#endif + DMA_WRITE_REG(INCA_IP_DMA_DMA_TXCCR0, regValue); + +#if 1 + for(i = 0; KSEG1ADDR(&tx_ring[tx_hold])->C == 0; i++) + { + if (i >= TOUT_LOOP) + { + printf("%s: tx buffer not ready\n", dev->name); + goto Done; + } + } +#endif + res = length; +Done: +#if 0 + printf("Leaving inca_switch_send()\n"); +#endif + return res; +} + + +static int inca_switch_recv(struct eth_device *dev) +{ + int length = 0; + inca_rx_descriptor_t * rx_desc; + +#if 0 + printf("Entered inca_switch_recv()\n"); +#endif + + for (;;) + { + rx_desc = KSEG1ADDR(&rx_ring[rx_new]); + + if (rx_desc->status.field.C == 0) + { + break; + } + +#if 0 + rx_ring[rx_new].params.field.HOLD = 1; +#endif + + if (! rx_desc->status.field.Eop) + { + printf("Partly received packet!!!\n"); + break; + } + + length = rx_desc->status.field.NBT; + rx_desc->status.word &= + ~(INCA_DMA_RX_EOP | INCA_DMA_RX_SOP | INCA_DMA_RX_C); +#if 0 +{ + int i; + for (i=0;i<length - 4;i++) { + if (i % 16 == 0) printf("\n%04x: ", i); + printf("%02X ", NetRxPackets[rx_new][i]); + } + printf("\n"); +} +#endif + + if (length) + { +#if 0 + printf("Received %d bytes\n", length); +#endif + NetReceive((void*)KSEG1ADDR(NetRxPackets[rx_new]), + length - 4); + } + else + { +#if 1 + printf("Zero length!!!\n"); +#endif + } + + + KSEG1ADDR(&rx_ring[rx_hold])->params.field.HOLD = 0; + + rx_hold = rx_new; + + rx_new = (rx_new + 1) % NUM_RX_DESC; + } + +#if 0 + printf("Leaving inca_switch_recv()\n"); +#endif + + return length; +} + + +static void inca_switch_halt(struct eth_device *dev) +{ +#if 0 + printf("Entered inca_switch_halt()\n"); +#endif + +#if 1 + initialized = 0; +#endif +#if 1 + /* Disable forwarding to the CPU port. + */ + SW_WRITE_REG(INCA_IP_Switch_ST_PT,0xf); + + /* Close RxDMA channel. + */ + DMA_WRITE_REG(INCA_IP_DMA_DMA_RXCCR0, INCA_IP_DMA_DMA_RXCCR0_OFF); + + /* Close TxDMA channel. + */ + DMA_WRITE_REG(INCA_IP_DMA_DMA_TXCCR0, INCA_IP_DMA_DMA_TXCCR0_OFF); + + +#endif +#if 0 + printf("Leaving inca_switch_halt()\n"); +#endif +} + + +static void inca_init_switch_chip(void) +{ + u32 regValue; + + /* To workaround a problem with collision counter + * (see Errata sheet). + */ + SW_WRITE_REG(INCA_IP_Switch_PC_TX_CTL, 0x00000001); + SW_WRITE_REG(INCA_IP_Switch_LAN_TX_CTL, 0x00000001); + +#if 1 + /* init MDIO configuration: + MDS (Poll speed): 0x01 (4ms) + PHY_LAN_ADDR: 0x06 + PHY_PC_ADDR: 0x05 + UEP (Use External PHY): 0x00 (Internal PHY is used) + PS (Port Select): 0x00 (PT/UMM for LAN) + PT (PHY Test): 0x00 (no test mode) + UMM (Use MDIO Mode): 0x00 (state machine is disabled) + */ + SW_WRITE_REG(INCA_IP_Switch_MDIO_CFG, 0x4c50); + + /* init PHY: + SL (Auto Neg. Speed for LAN) + SP (Auto Neg. Speed for PC) + LL (Link Status for LAN) + LP (Link Status for PC) + DL (Duplex Status for LAN) + DP (Duplex Status for PC) + PL (Auto Neg. Pause Status for LAN) + PP (Auto Neg. Pause Status for PC) + */ + SW_WRITE_REG (INCA_IP_Switch_EPHY, 0xff); + + /* MDIO_ACC: + RA (Request/Ack) 0x01 (Request) + RW (Read/Write) 0x01 (Write) + PHY_ADDR 0x05 (PC) + REG_ADDR 0x00 (PHY_BCR: basic control register) + PHY_DATA 0x8000 + Reset - software reset + LB (loop back) - normal + SS (speed select) - 10 Mbit/s + ANE (auto neg. enable) - disable + PD (power down) - normal + ISO (isolate) - normal + RAN (restart auto neg.) - normal + DM (duplex mode) - half duplex + CT (collision test) - enable + */ + SW_WRITE_REG(INCA_IP_Switch_MDIO_ACC, 0xc0a08000); + + /* MDIO_ACC: + RA (Request/Ack) 0x01 (Request) + RW (Read/Write) 0x01 (Write) + PHY_ADDR 0x06 (LAN) + REG_ADDR 0x00 (PHY_BCR: basic control register) + PHY_DATA 0x8000 + Reset - software reset + LB (loop back) - normal + SS (speed select) - 10 Mbit/s + ANE (auto neg. enable) - disable + PD (power down) - normal + ISO (isolate) - normal + RAN (restart auto neg.) - normal + DM (duplex mode) - half duplex + CT (collision test) - enable + */ + SW_WRITE_REG(INCA_IP_Switch_MDIO_ACC, 0xc0c08000); +#endif + + /* Make sure the CPU port is disabled for now. We + * don't want packets to get stacked for us until + * we enable DMA and are prepared to receive them. + */ + SW_WRITE_REG(INCA_IP_Switch_ST_PT,0xf); + + SW_READ_REG(INCA_IP_Switch_ARL_CTL, regValue); + + /* CRC GEN is enabled. + */ + regValue |= 0x00000200; + SW_WRITE_REG(INCA_IP_Switch_ARL_CTL, regValue); + + /* ADD TAG is disabled. + */ + SW_READ_REG(INCA_IP_Switch_PMAC_HD_CTL, regValue); + regValue &= ~0x00000002; + SW_WRITE_REG(INCA_IP_Switch_PMAC_HD_CTL, regValue); +} + + +static void inca_dma_init(void) +{ + /* Switch off all DMA channels. + */ + DMA_WRITE_REG(INCA_IP_DMA_DMA_RXCCR0, INCA_IP_DMA_DMA_RXCCR0_OFF); + DMA_WRITE_REG(INCA_IP_DMA_DMA_RXCCR1, INCA_IP_DMA_DMA_RXCCR1_OFF); + + DMA_WRITE_REG(INCA_IP_DMA_DMA_TXCCR0, INCA_IP_DMA_DMA_RXCCR0_OFF); + DMA_WRITE_REG(INCA_IP_DMA_DMA_TXCCR1, INCA_IP_DMA_DMA_TXCCR1_OFF); + DMA_WRITE_REG(INCA_IP_DMA_DMA_TXCCR2, INCA_IP_DMA_DMA_TXCCR2_OFF); + + /* Setup TX channel polling time. + */ + DMA_WRITE_REG(INCA_IP_DMA_DMA_TXPOLL, INCA_DMA_TX_POLLING_TIME); + + /* Setup RX channel polling time. + */ + DMA_WRITE_REG(INCA_IP_DMA_DMA_RXPOLL, INCA_DMA_RX_POLLING_TIME); + + /* ERRATA: write reset value into the DMA RX IMR register. + */ + DMA_WRITE_REG(INCA_IP_DMA_DMA_RXIMR, 0xFFFFFFFF); + + /* Just in case: disable all transmit interrupts also. + */ + DMA_WRITE_REG(INCA_IP_DMA_DMA_TXIMR, 0xFFFFFFFF); + + DMA_WRITE_REG(INCA_IP_DMA_DMA_TXISR, 0xFFFFFFFF); + DMA_WRITE_REG(INCA_IP_DMA_DMA_RXISR, 0xFFFFFFFF); +} + +#endif + + /* End of file. + */ + |