diff options
Diffstat (limited to 'drivers/net/eepro100.c')
| -rw-r--r-- | drivers/net/eepro100.c | 948 |
1 files changed, 948 insertions, 0 deletions
diff --git a/drivers/net/eepro100.c b/drivers/net/eepro100.c new file mode 100644 index 0000000..738146e --- /dev/null +++ b/drivers/net/eepro100.c @@ -0,0 +1,948 @@ +/* + * (C) Copyright 2002 + * 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> +#include <malloc.h> +#include <net.h> +#include <asm/io.h> +#include <pci.h> +#include <miiphy.h> + +#undef DEBUG + +#if defined(CONFIG_CMD_NET) \ + && defined(CONFIG_NET_MULTI) && defined(CONFIG_EEPRO100) + + /* Ethernet chip registers. + */ +#define SCBStatus 0 /* Rx/Command Unit Status *Word* */ +#define SCBIntAckByte 1 /* Rx/Command Unit STAT/ACK byte */ +#define SCBCmd 2 /* Rx/Command Unit Command *Word* */ +#define SCBIntrCtlByte 3 /* Rx/Command Unit Intr.Control Byte */ +#define SCBPointer 4 /* General purpose pointer. */ +#define SCBPort 8 /* Misc. commands and operands. */ +#define SCBflash 12 /* Flash memory control. */ +#define SCBeeprom 14 /* EEPROM memory control. */ +#define SCBCtrlMDI 16 /* MDI interface control. */ +#define SCBEarlyRx 20 /* Early receive byte count. */ +#define SCBGenControl 28 /* 82559 General Control Register */ +#define SCBGenStatus 29 /* 82559 General Status register */ + + /* 82559 SCB status word defnitions + */ +#define SCB_STATUS_CX 0x8000 /* CU finished command (transmit) */ +#define SCB_STATUS_FR 0x4000 /* frame received */ +#define SCB_STATUS_CNA 0x2000 /* CU left active state */ +#define SCB_STATUS_RNR 0x1000 /* receiver left ready state */ +#define SCB_STATUS_MDI 0x0800 /* MDI read/write cycle done */ +#define SCB_STATUS_SWI 0x0400 /* software generated interrupt */ +#define SCB_STATUS_FCP 0x0100 /* flow control pause interrupt */ + +#define SCB_INTACK_MASK 0xFD00 /* all the above */ + +#define SCB_INTACK_TX (SCB_STATUS_CX | SCB_STATUS_CNA) +#define SCB_INTACK_RX (SCB_STATUS_FR | SCB_STATUS_RNR) + + /* System control block commands + */ +/* CU Commands */ +#define CU_NOP 0x0000 +#define CU_START 0x0010 +#define CU_RESUME 0x0020 +#define CU_STATSADDR 0x0040 /* Load Dump Statistics ctrs addr */ +#define CU_SHOWSTATS 0x0050 /* Dump statistics counters. */ +#define CU_ADDR_LOAD 0x0060 /* Base address to add to CU commands */ +#define CU_DUMPSTATS 0x0070 /* Dump then reset stats counters. */ + +/* RUC Commands */ +#define RUC_NOP 0x0000 +#define RUC_START 0x0001 +#define RUC_RESUME 0x0002 +#define RUC_ABORT 0x0004 +#define RUC_ADDR_LOAD 0x0006 /* (seems not to clear on acceptance) */ +#define RUC_RESUMENR 0x0007 + +#define CU_CMD_MASK 0x00f0 +#define RU_CMD_MASK 0x0007 + +#define SCB_M 0x0100 /* 0 = enable interrupt, 1 = disable */ +#define SCB_SWI 0x0200 /* 1 - cause device to interrupt */ + +#define CU_STATUS_MASK 0x00C0 +#define RU_STATUS_MASK 0x003C + +#define RU_STATUS_IDLE (0<<2) +#define RU_STATUS_SUS (1<<2) +#define RU_STATUS_NORES (2<<2) +#define RU_STATUS_READY (4<<2) +#define RU_STATUS_NO_RBDS_SUS ((1<<2)|(8<<2)) +#define RU_STATUS_NO_RBDS_NORES ((2<<2)|(8<<2)) +#define RU_STATUS_NO_RBDS_READY ((4<<2)|(8<<2)) + + /* 82559 Port interface commands. + */ +#define I82559_RESET 0x00000000 /* Software reset */ +#define I82559_SELFTEST 0x00000001 /* 82559 Selftest command */ +#define I82559_SELECTIVE_RESET 0x00000002 +#define I82559_DUMP 0x00000003 +#define I82559_DUMP_WAKEUP 0x00000007 + + /* 82559 Eeprom interface. + */ +#define EE_SHIFT_CLK 0x01 /* EEPROM shift clock. */ +#define EE_CS 0x02 /* EEPROM chip select. */ +#define EE_DATA_WRITE 0x04 /* EEPROM chip data in. */ +#define EE_WRITE_0 0x01 +#define EE_WRITE_1 0x05 +#define EE_DATA_READ 0x08 /* EEPROM chip data out. */ +#define EE_ENB (0x4800 | EE_CS) +#define EE_CMD_BITS 3 +#define EE_DATA_BITS 16 + + /* The EEPROM commands include the alway-set leading bit. + */ +#define EE_EWENB_CMD (4 << addr_len) +#define EE_WRITE_CMD (5 << addr_len) +#define EE_READ_CMD (6 << addr_len) +#define EE_ERASE_CMD (7 << addr_len) + + /* Receive frame descriptors. + */ +struct RxFD { + volatile u16 status; + volatile u16 control; + volatile u32 link; /* struct RxFD * */ + volatile u32 rx_buf_addr; /* void * */ + volatile u32 count; + + volatile u8 data[PKTSIZE_ALIGN]; +}; + +#define RFD_STATUS_C 0x8000 /* completion of received frame */ +#define RFD_STATUS_OK 0x2000 /* frame received with no errors */ + +#define RFD_CONTROL_EL 0x8000 /* 1=last RFD in RFA */ +#define RFD_CONTROL_S 0x4000 /* 1=suspend RU after receiving frame */ +#define RFD_CONTROL_H 0x0010 /* 1=RFD is a header RFD */ +#define RFD_CONTROL_SF 0x0008 /* 0=simplified, 1=flexible mode */ + +#define RFD_COUNT_MASK 0x3fff +#define RFD_COUNT_F 0x4000 +#define RFD_COUNT_EOF 0x8000 + +#define RFD_RX_CRC 0x0800 /* crc error */ +#define RFD_RX_ALIGNMENT 0x0400 /* alignment error */ +#define RFD_RX_RESOURCE 0x0200 /* out of space, no resources */ +#define RFD_RX_DMA_OVER 0x0100 /* DMA overrun */ +#define RFD_RX_SHORT 0x0080 /* short frame error */ +#define RFD_RX_LENGTH 0x0020 +#define RFD_RX_ERROR 0x0010 /* receive error */ +#define RFD_RX_NO_ADR_MATCH 0x0004 /* no address match */ +#define RFD_RX_IA_MATCH 0x0002 /* individual address does not match */ +#define RFD_RX_TCO 0x0001 /* TCO indication */ + + /* Transmit frame descriptors + */ +struct TxFD { /* Transmit frame descriptor set. */ + volatile u16 status; + volatile u16 command; + volatile u32 link; /* void * */ + volatile u32 tx_desc_addr; /* Always points to the tx_buf_addr element. */ + volatile s32 count; + + volatile u32 tx_buf_addr0; /* void *, frame to be transmitted. */ + volatile s32 tx_buf_size0; /* Length of Tx frame. */ + volatile u32 tx_buf_addr1; /* void *, frame to be transmitted. */ + volatile s32 tx_buf_size1; /* Length of Tx frame. */ +}; + +#define TxCB_CMD_TRANSMIT 0x0004 /* transmit command */ +#define TxCB_CMD_SF 0x0008 /* 0=simplified, 1=flexible mode */ +#define TxCB_CMD_NC 0x0010 /* 0=CRC insert by controller */ +#define TxCB_CMD_I 0x2000 /* generate interrupt on completion */ +#define TxCB_CMD_S 0x4000 /* suspend on completion */ +#define TxCB_CMD_EL 0x8000 /* last command block in CBL */ + +#define TxCB_COUNT_MASK 0x3fff +#define TxCB_COUNT_EOF 0x8000 + + /* The Speedo3 Rx and Tx frame/buffer descriptors. + */ +struct descriptor { /* A generic descriptor. */ + volatile u16 status; + volatile u16 command; + volatile u32 link; /* struct descriptor * */ + + unsigned char params[0]; +}; + +#define CFG_CMD_EL 0x8000 +#define CFG_CMD_SUSPEND 0x4000 +#define CFG_CMD_INT 0x2000 +#define CFG_CMD_IAS 0x0001 /* individual address setup */ +#define CFG_CMD_CONFIGURE 0x0002 /* configure */ + +#define CFG_STATUS_C 0x8000 +#define CFG_STATUS_OK 0x2000 + + /* Misc. + */ +#define NUM_RX_DESC PKTBUFSRX +#define NUM_TX_DESC 1 /* Number of TX descriptors */ + +#define TOUT_LOOP 1000000 + +#define ETH_ALEN 6 + +static struct RxFD rx_ring[NUM_RX_DESC]; /* RX descriptor ring */ +static struct TxFD tx_ring[NUM_TX_DESC]; /* TX descriptor ring */ +static int rx_next; /* RX descriptor ring pointer */ +static int tx_next; /* TX descriptor ring pointer */ +static int tx_threshold; + +/* + * The parameters for a CmdConfigure operation. + * There are so many options that it would be difficult to document + * each bit. We mostly use the default or recommended settings. + */ +static const char i82557_config_cmd[] = { + 22, 0x08, 0, 0, 0, 0, 0x32, 0x03, 1, /* 1=Use MII 0=Use AUI */ + 0, 0x2E, 0, 0x60, 0, + 0xf2, 0x48, 0, 0x40, 0xf2, 0x80, /* 0x40=Force full-duplex */ + 0x3f, 0x05, +}; +static const char i82558_config_cmd[] = { + 22, 0x08, 0, 1, 0, 0, 0x22, 0x03, 1, /* 1=Use MII 0=Use AUI */ + 0, 0x2E, 0, 0x60, 0x08, 0x88, + 0x68, 0, 0x40, 0xf2, 0x84, /* Disable FC */ + 0x31, 0x05, +}; + +static void init_rx_ring (struct eth_device *dev); +static void purge_tx_ring (struct eth_device *dev); + +static void read_hw_addr (struct eth_device *dev, bd_t * bis); + +static int eepro100_init (struct eth_device *dev, bd_t * bis); +static int eepro100_send (struct eth_device *dev, volatile void *packet, + int length); +static int eepro100_recv (struct eth_device *dev); +static void eepro100_halt (struct eth_device *dev); + +#if defined(CONFIG_E500) || defined(CONFIG_DB64360) || defined(CONFIG_DB64460) +#define bus_to_phys(a) (a) +#define phys_to_bus(a) (a) +#else +#define bus_to_phys(a) pci_mem_to_phys((pci_dev_t)dev->priv, a) +#define phys_to_bus(a) pci_phys_to_mem((pci_dev_t)dev->priv, a) +#endif + +static inline int INW (struct eth_device *dev, u_long addr) +{ + return le16_to_cpu (*(volatile u16 *) (addr + dev->iobase)); +} + +static inline void OUTW (struct eth_device *dev, int command, u_long addr) +{ + *(volatile u16 *) ((addr + dev->iobase)) = cpu_to_le16 (command); +} + +static inline void OUTL (struct eth_device *dev, int command, u_long addr) +{ + *(volatile u32 *) ((addr + dev->iobase)) = cpu_to_le32 (command); +} + +#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) +static inline int INL (struct eth_device *dev, u_long addr) +{ + return le32_to_cpu (*(volatile u32 *) (addr + dev->iobase)); +} + +static int get_phyreg (struct eth_device *dev, unsigned char addr, + unsigned char reg, unsigned short *value) +{ + int cmd; + int timeout = 50; + + /* read requested data */ + cmd = (2 << 26) | ((addr & 0x1f) << 21) | ((reg & 0x1f) << 16); + OUTL (dev, cmd, SCBCtrlMDI); + + do { + udelay(1000); + cmd = INL (dev, SCBCtrlMDI); + } while (!(cmd & (1 << 28)) && (--timeout)); + + if (timeout == 0) + return -1; + + *value = (unsigned short) (cmd & 0xffff); + + return 0; +} + +static int set_phyreg (struct eth_device *dev, unsigned char addr, + unsigned char reg, unsigned short value) +{ + int cmd; + int timeout = 50; + + /* write requested data */ + cmd = (1 << 26) | ((addr & 0x1f) << 21) | ((reg & 0x1f) << 16); + OUTL (dev, cmd | value, SCBCtrlMDI); + + while (!(INL (dev, SCBCtrlMDI) & (1 << 28)) && (--timeout)) + udelay(1000); + + if (timeout == 0) + return -1; + + return 0; +} + +/* Check if given phyaddr is valid, i.e. there is a PHY connected. + * Do this by checking model value field from ID2 register. + */ +static struct eth_device* verify_phyaddr (char *devname, unsigned char addr) +{ + struct eth_device *dev; + unsigned short value; + unsigned char model; + + dev = eth_get_dev_by_name(devname); + if (dev == NULL) { + printf("%s: no such device\n", devname); + return NULL; + } + + /* read id2 register */ + if (get_phyreg(dev, addr, PHY_PHYIDR2, &value) != 0) { + printf("%s: mii read timeout!\n", devname); + return NULL; + } + + /* get model */ + model = (unsigned char)((value >> 4) & 0x003f); + + if (model == 0) { + printf("%s: no PHY at address %d\n", devname, addr); + return NULL; + } + + return dev; +} + +static int eepro100_miiphy_read (char *devname, unsigned char addr, + unsigned char reg, unsigned short *value) +{ + struct eth_device *dev; + + dev = verify_phyaddr(devname, addr); + if (dev == NULL) + return -1; + + if (get_phyreg(dev, addr, reg, value) != 0) { + printf("%s: mii read timeout!\n", devname); + return -1; + } + + return 0; +} + +static int eepro100_miiphy_write (char *devname, unsigned char addr, + unsigned char reg, unsigned short value) +{ + struct eth_device *dev; + + dev = verify_phyaddr(devname, addr); + if (dev == NULL) + return -1; + + if (set_phyreg(dev, addr, reg, value) != 0) { + printf("%s: mii write timeout!\n", devname); + return -1; + } + + return 0; +} + +#endif + +/* Wait for the chip get the command. +*/ +static int wait_for_eepro100 (struct eth_device *dev) +{ + int i; + + for (i = 0; INW (dev, SCBCmd) & (CU_CMD_MASK | RU_CMD_MASK); i++) { + if (i >= TOUT_LOOP) { + return 0; + } + } + + return 1; +} + +static struct pci_device_id supported[] = { + {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82557}, + {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82559}, + {PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82559ER}, + {} +}; + +int eepro100_initialize (bd_t * bis) +{ + pci_dev_t devno; + int card_number = 0; + struct eth_device *dev; + u32 iobase, status; + int idx = 0; + + while (1) { + /* Find PCI device + */ + if ((devno = pci_find_devices (supported, idx++)) < 0) { + break; + } + + pci_read_config_dword (devno, PCI_BASE_ADDRESS_0, &iobase); + iobase &= ~0xf; + +#ifdef DEBUG + printf ("eepro100: Intel i82559 PCI EtherExpressPro @0x%x\n", + iobase); +#endif + + pci_write_config_dword (devno, + PCI_COMMAND, + PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); + + /* Check if I/O accesses and Bus Mastering are enabled. + */ + pci_read_config_dword (devno, PCI_COMMAND, &status); + if (!(status & PCI_COMMAND_MEMORY)) { + printf ("Error: Can not enable MEM access.\n"); + continue; + } + + if (!(status & PCI_COMMAND_MASTER)) { + printf ("Error: Can not enable Bus Mastering.\n"); + continue; + } + + dev = (struct eth_device *) malloc (sizeof *dev); + + sprintf (dev->name, "i82559#%d", card_number); + dev->priv = (void *) devno; /* this have to come before bus_to_phys() */ + dev->iobase = bus_to_phys (iobase); + dev->init = eepro100_init; + dev->halt = eepro100_halt; + dev->send = eepro100_send; + dev->recv = eepro100_recv; + + eth_register (dev); + +#if defined (CONFIG_MII) || defined(CONFIG_CMD_MII) + /* register mii command access routines */ + miiphy_register(dev->name, + eepro100_miiphy_read, eepro100_miiphy_write); +#endif + + card_number++; + + /* Set the latency timer for value. + */ + pci_write_config_byte (devno, PCI_LATENCY_TIMER, 0x20); + + udelay (10 * 1000); + + read_hw_addr (dev, bis); + } + + return card_number; +} + + +static int eepro100_init (struct eth_device *dev, bd_t * bis) +{ + int i, status = 0; + int tx_cur; + struct descriptor *ias_cmd, *cfg_cmd; + + /* Reset the ethernet controller + */ + OUTL (dev, I82559_SELECTIVE_RESET, SCBPort); + udelay (20); + + OUTL (dev, I82559_RESET, SCBPort); + udelay (20); + + if (!wait_for_eepro100 (dev)) { + printf ("Error: Can not reset ethernet controller.\n"); + goto Done; + } + OUTL (dev, 0, SCBPointer); + OUTW (dev, SCB_M | RUC_ADDR_LOAD, SCBCmd); + + if (!wait_for_eepro100 (dev)) { + printf ("Error: Can not reset ethernet controller.\n"); + goto Done; + } + OUTL (dev, 0, SCBPointer); + OUTW (dev, SCB_M | CU_ADDR_LOAD, SCBCmd); + + /* Initialize Rx and Tx rings. + */ + init_rx_ring (dev); + purge_tx_ring (dev); + + /* Tell the adapter where the RX ring is located. + */ + if (!wait_for_eepro100 (dev)) { + printf ("Error: Can not reset ethernet controller.\n"); + goto Done; + } + + OUTL (dev, phys_to_bus ((u32) & rx_ring[rx_next]), SCBPointer); + OUTW (dev, SCB_M | RUC_START, SCBCmd); + + /* Send the Configure frame */ + tx_cur = tx_next; + tx_next = ((tx_next + 1) % NUM_TX_DESC); + + cfg_cmd = (struct descriptor *) &tx_ring[tx_cur]; + cfg_cmd->command = cpu_to_le16 ((CFG_CMD_SUSPEND | CFG_CMD_CONFIGURE)); + cfg_cmd->status = 0; + cfg_cmd->link = cpu_to_le32 (phys_to_bus ((u32) & tx_ring[tx_next])); + + memcpy (cfg_cmd->params, i82558_config_cmd, + sizeof (i82558_config_cmd)); + + if (!wait_for_eepro100 (dev)) { + printf ("Error---CFG_CMD_CONFIGURE: Can not reset ethernet controller.\n"); + goto Done; + } + + OUTL (dev, phys_to_bus ((u32) & tx_ring[tx_cur]), SCBPointer); + OUTW (dev, SCB_M | CU_START, SCBCmd); + + for (i = 0; + !(le16_to_cpu (tx_ring[tx_cur].status) & CFG_STATUS_C); + i++) { + if (i >= TOUT_LOOP) { + printf ("%s: Tx error buffer not ready\n", dev->name); + goto Done; + } + } + + if (!(le16_to_cpu (tx_ring[tx_cur].status) & CFG_STATUS_OK)) { + printf ("TX error status = 0x%08X\n", + le16_to_cpu (tx_ring[tx_cur].status)); + goto Done; + } + + /* Send the Individual Address Setup frame + */ + tx_cur = tx_next; + tx_next = ((tx_next + 1) % NUM_TX_DESC); + + ias_cmd = (struct descriptor *) &tx_ring[tx_cur]; + ias_cmd->command = cpu_to_le16 ((CFG_CMD_SUSPEND | CFG_CMD_IAS)); + ias_cmd->status = 0; + ias_cmd->link = cpu_to_le32 (phys_to_bus ((u32) & tx_ring[tx_next])); + + memcpy (ias_cmd->params, dev->enetaddr, 6); + + /* Tell the adapter where the TX ring is located. + */ + if (!wait_for_eepro100 (dev)) { + printf ("Error: Can not reset ethernet controller.\n"); + goto Done; + } + + OUTL (dev, phys_to_bus ((u32) & tx_ring[tx_cur]), SCBPointer); + OUTW (dev, SCB_M | CU_START, SCBCmd); + + for (i = 0; !(le16_to_cpu (tx_ring[tx_cur].status) & CFG_STATUS_C); + i++) { + if (i >= TOUT_LOOP) { + printf ("%s: Tx error buffer not ready\n", + dev->name); + goto Done; + } + } + + if (!(le16_to_cpu (tx_ring[tx_cur].status) & CFG_STATUS_OK)) { + printf ("TX error status = 0x%08X\n", + le16_to_cpu (tx_ring[tx_cur].status)); + goto Done; + } + + status = 1; + + Done: + return status; +} + +static int eepro100_send (struct eth_device *dev, volatile void *packet, int length) +{ + int i, status = -1; + int tx_cur; + + if (length <= 0) { + printf ("%s: bad packet size: %d\n", dev->name, length); + goto Done; + } + + tx_cur = tx_next; + tx_next = (tx_next + 1) % NUM_TX_DESC; + + tx_ring[tx_cur].command = cpu_to_le16 ( TxCB_CMD_TRANSMIT | + TxCB_CMD_SF | + TxCB_CMD_S | + TxCB_CMD_EL ); + tx_ring[tx_cur].status = 0; + tx_ring[tx_cur].count = cpu_to_le32 (tx_threshold); + tx_ring[tx_cur].link = + cpu_to_le32 (phys_to_bus ((u32) & tx_ring[tx_next])); + tx_ring[tx_cur].tx_desc_addr = + cpu_to_le32 (phys_to_bus ((u32) & tx_ring[tx_cur].tx_buf_addr0)); + tx_ring[tx_cur].tx_buf_addr0 = + cpu_to_le32 (phys_to_bus ((u_long) packet)); + tx_ring[tx_cur].tx_buf_size0 = cpu_to_le32 (length); + + if (!wait_for_eepro100 (dev)) { + printf ("%s: Tx error ethernet controller not ready.\n", + dev->name); + goto Done; + } + + /* Send the packet. + */ + OUTL (dev, phys_to_bus ((u32) & tx_ring[tx_cur]), SCBPointer); + OUTW (dev, SCB_M | CU_START, SCBCmd); + + for (i = 0; !(le16_to_cpu (tx_ring[tx_cur].status) & CFG_STATUS_C); + i++) { + if (i >= TOUT_LOOP) { + printf ("%s: Tx error buffer not ready\n", dev->name); + goto Done; + } + } + + if (!(le16_to_cpu (tx_ring[tx_cur].status) & CFG_STATUS_OK)) { + printf ("TX error status = 0x%08X\n", + le16_to_cpu (tx_ring[tx_cur].status)); + goto Done; + } + + status = length; + + Done: + return status; +} + +static int eepro100_recv (struct eth_device *dev) +{ + u16 status, stat; + int rx_prev, length = 0; + + stat = INW (dev, SCBStatus); + OUTW (dev, stat & SCB_STATUS_RNR, SCBStatus); + + for (;;) { + status = le16_to_cpu (rx_ring[rx_next].status); + + if (!(status & RFD_STATUS_C)) { + break; + } + + /* Valid frame status. + */ + if ((status & RFD_STATUS_OK)) { + /* A valid frame received. + */ + length = le32_to_cpu (rx_ring[rx_next].count) & 0x3fff; + + /* Pass the packet up to the protocol + * layers. + */ + NetReceive (rx_ring[rx_next].data, length); + } else { + /* There was an error. + */ + printf ("RX error status = 0x%08X\n", status); + } + + rx_ring[rx_next].control = cpu_to_le16 (RFD_CONTROL_S); + rx_ring[rx_next].status = 0; + rx_ring[rx_next].count = cpu_to_le32 (PKTSIZE_ALIGN << 16); + + rx_prev = (rx_next + NUM_RX_DESC - 1) % NUM_RX_DESC; + rx_ring[rx_prev].control = 0; + + /* Update entry information. + */ + rx_next = (rx_next + 1) % NUM_RX_DESC; + } + + if (stat & SCB_STATUS_RNR) { + + printf ("%s: Receiver is not ready, restart it !\n", dev->name); + + /* Reinitialize Rx ring. + */ + init_rx_ring (dev); + + if (!wait_for_eepro100 (dev)) { + printf ("Error: Can not restart ethernet controller.\n"); + goto Done; + } + + OUTL (dev, phys_to_bus ((u32) & rx_ring[rx_next]), SCBPointer); + OUTW (dev, SCB_M | RUC_START, SCBCmd); + } + + Done: + return length; +} + +static void eepro100_halt (struct eth_device *dev) +{ + /* Reset the ethernet controller + */ + OUTL (dev, I82559_SELECTIVE_RESET, SCBPort); + udelay (20); + + OUTL (dev, I82559_RESET, SCBPort); + udelay (20); + + if (!wait_for_eepro100 (dev)) { + printf ("Error: Can not reset ethernet controller.\n"); + goto Done; + } + OUTL (dev, 0, SCBPointer); + OUTW (dev, SCB_M | RUC_ADDR_LOAD, SCBCmd); + + if (!wait_for_eepro100 (dev)) { + printf ("Error: Can not reset ethernet controller.\n"); + goto Done; + } + OUTL (dev, 0, SCBPointer); + OUTW (dev, SCB_M | CU_ADDR_LOAD, SCBCmd); + + Done: + return; +} + + /* SROM Read. + */ +static int read_eeprom (struct eth_device *dev, int location, int addr_len) +{ + unsigned short retval = 0; + int read_cmd = location | EE_READ_CMD; + int i; + + OUTW (dev, EE_ENB & ~EE_CS, SCBeeprom); + OUTW (dev, EE_ENB, SCBeeprom); + + /* Shift the read command bits out. */ + for (i = 12; i >= 0; i--) { + short dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0; + + OUTW (dev, EE_ENB | dataval, SCBeeprom); + udelay (1); + OUTW (dev, EE_ENB | dataval | EE_SHIFT_CLK, SCBeeprom); + udelay (1); + } + OUTW (dev, EE_ENB, SCBeeprom); + + for (i = 15; i >= 0; i--) { + OUTW (dev, EE_ENB | EE_SHIFT_CLK, SCBeeprom); + udelay (1); + retval = (retval << 1) | + ((INW (dev, SCBeeprom) & EE_DATA_READ) ? 1 : 0); + OUTW (dev, EE_ENB, SCBeeprom); + udelay (1); + } + + /* Terminate the EEPROM access. */ + OUTW (dev, EE_ENB & ~EE_CS, SCBeeprom); + return retval; +} + +#ifdef CONFIG_EEPRO100_SROM_WRITE +int eepro100_write_eeprom (struct eth_device* dev, int location, int addr_len, unsigned short data) +{ + unsigned short dataval; + int enable_cmd = 0x3f | EE_EWENB_CMD; + int write_cmd = location | EE_WRITE_CMD; + int i; + unsigned long datalong, tmplong; + + OUTW(dev, EE_ENB & ~EE_CS, SCBeeprom); + udelay(1); + OUTW(dev, EE_ENB, SCBeeprom); + + /* Shift the enable command bits out. */ + for (i = (addr_len+EE_CMD_BITS-1); i >= 0; i--) + { + dataval = (enable_cmd & (1 << i)) ? EE_DATA_WRITE : 0; + OUTW(dev, EE_ENB | dataval, SCBeeprom); + udelay(1); + OUTW(dev, EE_ENB | dataval | EE_SHIFT_CLK, SCBeeprom); + udelay(1); + } + + OUTW(dev, EE_ENB, SCBeeprom); + udelay(1); + OUTW(dev, EE_ENB & ~EE_CS, SCBeeprom); + udelay(1); + OUTW(dev, EE_ENB, SCBeeprom); + + + /* Shift the write command bits out. */ + for (i = (addr_len+EE_CMD_BITS-1); i >= 0; i--) + { + dataval = (write_cmd & (1 << i)) ? EE_DATA_WRITE : 0; + OUTW(dev, EE_ENB | dataval, SCBeeprom); + udelay(1); + OUTW(dev, EE_ENB | dataval | EE_SHIFT_CLK, SCBeeprom); + udelay(1); + } + + /* Write the data */ + datalong= (unsigned long) ((((data) & 0x00ff) << 8) | ( (data) >> 8)); + + for (i = 0; i< EE_DATA_BITS; i++) + { + /* Extract and move data bit to bit DI */ + dataval = ((datalong & 0x8000)>>13) ? EE_DATA_WRITE : 0; + + OUTW(dev, EE_ENB | dataval, SCBeeprom); + udelay(1); + OUTW(dev, EE_ENB | dataval | EE_SHIFT_CLK, SCBeeprom); + udelay(1); + OUTW(dev, EE_ENB | dataval, SCBeeprom); + udelay(1); + + datalong = datalong << 1; /* Adjust significant data bit*/ + } + + /* Finish up command (toggle CS) */ + OUTW(dev, EE_ENB & ~EE_CS, SCBeeprom); + udelay(1); /* delay for more than 250 ns */ + OUTW(dev, EE_ENB, SCBeeprom); + + /* Wait for programming ready (D0 = 1) */ + tmplong = 10; + do + { + dataval = INW(dev, SCBeeprom); + if (dataval & EE_DATA_READ) + break; + udelay(10000); + } + while (-- tmplong); + + if (tmplong == 0) + { + printf ("Write i82559 eeprom timed out (100 ms waiting for data ready.\n"); + return -1; + } + + /* Terminate the EEPROM access. */ + OUTW(dev, EE_ENB & ~EE_CS, SCBeeprom); + + return 0; +} +#endif + +static void init_rx_ring (struct eth_device *dev) +{ + int i; + + for (i = 0; i < NUM_RX_DESC; i++) { + rx_ring[i].status = 0; + rx_ring[i].control = + (i == NUM_RX_DESC - 1) ? cpu_to_le16 (RFD_CONTROL_S) : 0; + rx_ring[i].link = + cpu_to_le32 (phys_to_bus + ((u32) & rx_ring[(i + 1) % NUM_RX_DESC])); + rx_ring[i].rx_buf_addr = 0xffffffff; + rx_ring[i].count = cpu_to_le32 (PKTSIZE_ALIGN << 16); + } + + rx_next = 0; +} + +static void purge_tx_ring (struct eth_device *dev) +{ + int i; + + tx_next = 0; + tx_threshold = 0x01208000; + + for (i = 0; i < NUM_TX_DESC; i++) { + tx_ring[i].status = 0; + tx_ring[i].command = 0; + tx_ring[i].link = 0; + tx_ring[i].tx_desc_addr = 0; + tx_ring[i].count = 0; + + tx_ring[i].tx_buf_addr0 = 0; + tx_ring[i].tx_buf_size0 = 0; + tx_ring[i].tx_buf_addr1 = 0; + tx_ring[i].tx_buf_size1 = 0; + } +} + +static void read_hw_addr (struct eth_device *dev, bd_t * bis) +{ + u16 eeprom[0x40]; + u16 sum = 0; + int i, j; + int addr_len = read_eeprom (dev, 0, 6) == 0xffff ? 8 : 6; + + for (j = 0, i = 0; i < 0x40; i++) { + u16 value = read_eeprom (dev, i, addr_len); + + eeprom[i] = value; + sum += value; + if (i < 3) { + dev->enetaddr[j++] = value; + dev->enetaddr[j++] = value >> 8; + } + } + + if (sum != 0xBABA) { + memset (dev->enetaddr, 0, ETH_ALEN); +#ifdef DEBUG + printf ("%s: Invalid EEPROM checksum %#4.4x, " + "check settings before activating this device!\n", + dev->name, sum); +#endif + } +} + +#endif |