u-boot/drivers/inca-ip_sw.c

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/*
* 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) - enable
* 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, 0xc0a09000);
/* 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) - enable
* 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, 0xc0c09000);
#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