+/*
+ * 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.
+ */
+
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