+++ /dev/null
-/*
- * (C) Copyright 2010
- * Reinhard Meyer, EMK Elektronik, reinhard.meyer@emk-elektronik.de
- * Martin Krause, Martin.Krause@tqs.de
- * reworked original enc28j60.c
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
-
-#include <common.h>
-#include <net.h>
-#include <spi.h>
-#include <malloc.h>
-#include <netdev.h>
-#include <miiphy.h>
-#include "enc28j60.h"
-
-/*
- * IMPORTANT: spi_claim_bus() and spi_release_bus()
- * are called at begin and end of each of the following functions:
- * enc_miiphy_read(), enc_miiphy_write(), enc_write_hwaddr(),
- * enc_init(), enc_recv(), enc_send(), enc_halt()
- * ALL other functions assume that the bus has already been claimed!
- * Since net_process_received_packet() might call enc_send() in return, the bus
- * must be released, net_process_received_packet() called and claimed again.
- */
-
-/*
- * Controller memory layout.
- * We only allow 1 frame for transmission and reserve the rest
- * for reception to handle as many broadcast packets as possible.
- * Also use the memory from 0x0000 for receiver buffer. See errata pt. 5
- * 0x0000 - 0x19ff 6656 bytes receive buffer
- * 0x1a00 - 0x1fff 1536 bytes transmit buffer =
- * control(1)+frame(1518)+status(7)+reserve(10).
- */
-#define ENC_RX_BUF_START 0x0000
-#define ENC_RX_BUF_END 0x19ff
-#define ENC_TX_BUF_START 0x1a00
-#define ENC_TX_BUF_END 0x1fff
-#define ENC_MAX_FRM_LEN 1518
-#define RX_RESET_COUNTER 1000
-
-/*
- * For non data transfer functions, like phy read/write, set hwaddr, init
- * we do not need a full, time consuming init including link ready wait.
- * This enum helps to bring the chip through the minimum necessary inits.
- */
-enum enc_initstate {none=0, setupdone, linkready};
-typedef struct enc_device {
- struct eth_device *dev; /* back pointer */
- struct spi_slave *slave;
- int rx_reset_counter;
- u16 next_pointer;
- u8 bank; /* current bank in enc28j60 */
- enum enc_initstate initstate;
-} enc_dev_t;
-
-/*
- * enc_bset: set bits in a common register
- * enc_bclr: clear bits in a common register
- *
- * making the reg parameter u8 will give a compile time warning if the
- * functions are called with a register not accessible in all Banks
- */
-static void enc_bset(enc_dev_t *enc, const u8 reg, const u8 data)
-{
- u8 dout[2];
-
- dout[0] = CMD_BFS(reg);
- dout[1] = data;
- spi_xfer(enc->slave, 2 * 8, dout, NULL,
- SPI_XFER_BEGIN | SPI_XFER_END);
-}
-
-static void enc_bclr(enc_dev_t *enc, const u8 reg, const u8 data)
-{
- u8 dout[2];
-
- dout[0] = CMD_BFC(reg);
- dout[1] = data;
- spi_xfer(enc->slave, 2 * 8, dout, NULL,
- SPI_XFER_BEGIN | SPI_XFER_END);
-}
-
-/*
- * high byte of the register contains bank number:
- * 0: no bank switch necessary
- * 1: switch to bank 0
- * 2: switch to bank 1
- * 3: switch to bank 2
- * 4: switch to bank 3
- */
-static void enc_set_bank(enc_dev_t *enc, const u16 reg)
-{
- u8 newbank = reg >> 8;
-
- if (newbank == 0 || newbank == enc->bank)
- return;
- switch (newbank) {
- case 1:
- enc_bclr(enc, CTL_REG_ECON1,
- ENC_ECON1_BSEL0 | ENC_ECON1_BSEL1);
- break;
- case 2:
- enc_bset(enc, CTL_REG_ECON1, ENC_ECON1_BSEL0);
- enc_bclr(enc, CTL_REG_ECON1, ENC_ECON1_BSEL1);
- break;
- case 3:
- enc_bclr(enc, CTL_REG_ECON1, ENC_ECON1_BSEL0);
- enc_bset(enc, CTL_REG_ECON1, ENC_ECON1_BSEL1);
- break;
- case 4:
- enc_bset(enc, CTL_REG_ECON1,
- ENC_ECON1_BSEL0 | ENC_ECON1_BSEL1);
- break;
- }
- enc->bank = newbank;
-}
-
-/*
- * local functions to access SPI
- *
- * reg: register inside ENC28J60
- * data: 8/16 bits to write
- * c: number of retries
- *
- * enc_r8: read 8 bits
- * enc_r16: read 16 bits
- * enc_w8: write 8 bits
- * enc_w16: write 16 bits
- * enc_w8_retry: write 8 bits, verify and retry
- * enc_rbuf: read from ENC28J60 into buffer
- * enc_wbuf: write from buffer into ENC28J60
- */
-
-/*
- * MAC and MII registers need a 3 byte SPI transfer to read,
- * all other registers need a 2 byte SPI transfer.
- */
-static int enc_reg2nbytes(const u16 reg)
-{
- /* check if MAC or MII register */
- return ((reg >= CTL_REG_MACON1 && reg <= CTL_REG_MIRDH) ||
- (reg >= CTL_REG_MAADR1 && reg <= CTL_REG_MAADR4) ||
- (reg == CTL_REG_MISTAT)) ? 3 : 2;
-}
-
-/*
- * Read a byte register
- */
-static u8 enc_r8(enc_dev_t *enc, const u16 reg)
-{
- u8 dout[3];
- u8 din[3];
- int nbytes = enc_reg2nbytes(reg);
-
- enc_set_bank(enc, reg);
- dout[0] = CMD_RCR(reg);
- spi_xfer(enc->slave, nbytes * 8, dout, din,
- SPI_XFER_BEGIN | SPI_XFER_END);
- return din[nbytes-1];
-}
-
-/*
- * Read a L/H register pair and return a word.
- * Must be called with the L register's address.
- */
-static u16 enc_r16(enc_dev_t *enc, const u16 reg)
-{
- u8 dout[3];
- u8 din[3];
- u16 result;
- int nbytes = enc_reg2nbytes(reg);
-
- enc_set_bank(enc, reg);
- dout[0] = CMD_RCR(reg);
- spi_xfer(enc->slave, nbytes * 8, dout, din,
- SPI_XFER_BEGIN | SPI_XFER_END);
- result = din[nbytes-1];
- dout[0]++; /* next register */
- spi_xfer(enc->slave, nbytes * 8, dout, din,
- SPI_XFER_BEGIN | SPI_XFER_END);
- result |= din[nbytes-1] << 8;
- return result;
-}
-
-/*
- * Write a byte register
- */
-static void enc_w8(enc_dev_t *enc, const u16 reg, const u8 data)
-{
- u8 dout[2];
-
- enc_set_bank(enc, reg);
- dout[0] = CMD_WCR(reg);
- dout[1] = data;
- spi_xfer(enc->slave, 2 * 8, dout, NULL,
- SPI_XFER_BEGIN | SPI_XFER_END);
-}
-
-/*
- * Write a L/H register pair.
- * Must be called with the L register's address.
- */
-static void enc_w16(enc_dev_t *enc, const u16 reg, const u16 data)
-{
- u8 dout[2];
-
- enc_set_bank(enc, reg);
- dout[0] = CMD_WCR(reg);
- dout[1] = data;
- spi_xfer(enc->slave, 2 * 8, dout, NULL,
- SPI_XFER_BEGIN | SPI_XFER_END);
- dout[0]++; /* next register */
- dout[1] = data >> 8;
- spi_xfer(enc->slave, 2 * 8, dout, NULL,
- SPI_XFER_BEGIN | SPI_XFER_END);
-}
-
-/*
- * Write a byte register, verify and retry
- */
-static void enc_w8_retry(enc_dev_t *enc, const u16 reg, const u8 data, const int c)
-{
- u8 dout[2];
- u8 readback;
- int i;
-
- enc_set_bank(enc, reg);
- for (i = 0; i < c; i++) {
- dout[0] = CMD_WCR(reg);
- dout[1] = data;
- spi_xfer(enc->slave, 2 * 8, dout, NULL,
- SPI_XFER_BEGIN | SPI_XFER_END);
- readback = enc_r8(enc, reg);
- if (readback == data)
- break;
- /* wait 1ms */
- udelay(1000);
- }
- if (i == c) {
- printf("%s: write reg 0x%03x failed\n", enc->dev->name, reg);
- }
-}
-
-/*
- * Read ENC RAM into buffer
- */
-static void enc_rbuf(enc_dev_t *enc, const u16 length, u8 *buf)
-{
- u8 dout[1];
-
- dout[0] = CMD_RBM;
- spi_xfer(enc->slave, 8, dout, NULL, SPI_XFER_BEGIN);
- spi_xfer(enc->slave, length * 8, NULL, buf, SPI_XFER_END);
-#ifdef DEBUG
- puts("Rx:\n");
- print_buffer(0, buf, 1, length, 0);
-#endif
-}
-
-/*
- * Write buffer into ENC RAM
- */
-static void enc_wbuf(enc_dev_t *enc, const u16 length, const u8 *buf, const u8 control)
-{
- u8 dout[2];
- dout[0] = CMD_WBM;
- dout[1] = control;
- spi_xfer(enc->slave, 2 * 8, dout, NULL, SPI_XFER_BEGIN);
- spi_xfer(enc->slave, length * 8, buf, NULL, SPI_XFER_END);
-#ifdef DEBUG
- puts("Tx:\n");
- print_buffer(0, buf, 1, length, 0);
-#endif
-}
-
-/*
- * Try to claim the SPI bus.
- * Print error message on failure.
- */
-static int enc_claim_bus(enc_dev_t *enc)
-{
- int rc = spi_claim_bus(enc->slave);
- if (rc)
- printf("%s: failed to claim SPI bus\n", enc->dev->name);
- return rc;
-}
-
-/*
- * Release previously claimed SPI bus.
- * This function is mainly for symmetry to enc_claim_bus().
- * Let the toolchain decide to inline it...
- */
-static void enc_release_bus(enc_dev_t *enc)
-{
- spi_release_bus(enc->slave);
-}
-
-/*
- * Read PHY register
- */
-static u16 enc_phy_read(enc_dev_t *enc, const u8 addr)
-{
- uint64_t etime;
- u8 status;
-
- enc_w8(enc, CTL_REG_MIREGADR, addr);
- enc_w8(enc, CTL_REG_MICMD, ENC_MICMD_MIIRD);
- /* 1 second timeout - only happens on hardware problem */
- etime = get_ticks() + get_tbclk();
- /* poll MISTAT.BUSY bit until operation is complete */
- do
- {
- status = enc_r8(enc, CTL_REG_MISTAT);
- } while (get_ticks() <= etime && (status & ENC_MISTAT_BUSY));
- if (status & ENC_MISTAT_BUSY) {
- printf("%s: timeout reading phy\n", enc->dev->name);
- return 0;
- }
- enc_w8(enc, CTL_REG_MICMD, 0);
- return enc_r16(enc, CTL_REG_MIRDL);
-}
-
-/*
- * Write PHY register
- */
-static void enc_phy_write(enc_dev_t *enc, const u8 addr, const u16 data)
-{
- uint64_t etime;
- u8 status;
-
- enc_w8(enc, CTL_REG_MIREGADR, addr);
- enc_w16(enc, CTL_REG_MIWRL, data);
- /* 1 second timeout - only happens on hardware problem */
- etime = get_ticks() + get_tbclk();
- /* poll MISTAT.BUSY bit until operation is complete */
- do
- {
- status = enc_r8(enc, CTL_REG_MISTAT);
- } while (get_ticks() <= etime && (status & ENC_MISTAT_BUSY));
- if (status & ENC_MISTAT_BUSY) {
- printf("%s: timeout writing phy\n", enc->dev->name);
- return;
- }
-}
-
-/*
- * Verify link status, wait if necessary
- *
- * Note: with a 10 MBit/s only PHY there is no autonegotiation possible,
- * half/full duplex is a pure setup matter. For the time being, this driver
- * will setup in half duplex mode only.
- */
-static int enc_phy_link_wait(enc_dev_t *enc)
-{
- u16 status;
- int duplex;
- uint64_t etime;
-
-#ifdef CONFIG_ENC_SILENTLINK
- /* check if we have a link, then just return */
- status = enc_phy_read(enc, PHY_REG_PHSTAT1);
- if (status & ENC_PHSTAT1_LLSTAT)
- return 0;
-#endif
-
- /* wait for link with 1 second timeout */
- etime = get_ticks() + get_tbclk();
- while (get_ticks() <= etime) {
- status = enc_phy_read(enc, PHY_REG_PHSTAT1);
- if (status & ENC_PHSTAT1_LLSTAT) {
- /* now we have a link */
- status = enc_phy_read(enc, PHY_REG_PHSTAT2);
- duplex = (status & ENC_PHSTAT2_DPXSTAT) ? 1 : 0;
- printf("%s: link up, 10Mbps %s-duplex\n",
- enc->dev->name, duplex ? "full" : "half");
- return 0;
- }
- udelay(1000);
- }
-
- /* timeout occurred */
- printf("%s: link down\n", enc->dev->name);
- return 1;
-}
-
-/*
- * This function resets the receiver only.
- */
-static void enc_reset_rx(enc_dev_t *enc)
-{
- u8 econ1;
-
- econ1 = enc_r8(enc, CTL_REG_ECON1);
- if ((econ1 & ENC_ECON1_RXRST) == 0) {
- enc_bset(enc, CTL_REG_ECON1, ENC_ECON1_RXRST);
- enc->rx_reset_counter = RX_RESET_COUNTER;
- }
-}
-
-/*
- * Reset receiver and reenable it.
- */
-static void enc_reset_rx_call(enc_dev_t *enc)
-{
- enc_bclr(enc, CTL_REG_ECON1, ENC_ECON1_RXRST);
- enc_bset(enc, CTL_REG_ECON1, ENC_ECON1_RXEN);
-}
-
-/*
- * Copy a packet from the receive ring and forward it to
- * the protocol stack.
- */
-static void enc_receive(enc_dev_t *enc)
-{
- u8 *packet = (u8 *)net_rx_packets[0];
- u16 pkt_len;
- u16 copy_len;
- u16 status;
- u8 pkt_cnt = 0;
- u16 rxbuf_rdpt;
- u8 hbuf[6];
-
- enc_w16(enc, CTL_REG_ERDPTL, enc->next_pointer);
- do {
- enc_rbuf(enc, 6, hbuf);
- enc->next_pointer = hbuf[0] | (hbuf[1] << 8);
- pkt_len = hbuf[2] | (hbuf[3] << 8);
- status = hbuf[4] | (hbuf[5] << 8);
- debug("next_pointer=$%04x pkt_len=%u status=$%04x\n",
- enc->next_pointer, pkt_len, status);
- if (pkt_len <= ENC_MAX_FRM_LEN)
- copy_len = pkt_len;
- else
- copy_len = 0;
- if ((status & (1L << 7)) == 0) /* check Received Ok bit */
- copy_len = 0;
- /* check if next pointer is resonable */
- if (enc->next_pointer >= ENC_TX_BUF_START)
- copy_len = 0;
- if (copy_len > 0) {
- enc_rbuf(enc, copy_len, packet);
- }
- /* advance read pointer to next pointer */
- enc_w16(enc, CTL_REG_ERDPTL, enc->next_pointer);
- /* decrease packet counter */
- enc_bset(enc, CTL_REG_ECON2, ENC_ECON2_PKTDEC);
- /*
- * Only odd values should be written to ERXRDPTL,
- * see errata B4 pt.13
- */
- rxbuf_rdpt = enc->next_pointer - 1;
- if ((rxbuf_rdpt < enc_r16(enc, CTL_REG_ERXSTL)) ||
- (rxbuf_rdpt > enc_r16(enc, CTL_REG_ERXNDL))) {
- enc_w16(enc, CTL_REG_ERXRDPTL,
- enc_r16(enc, CTL_REG_ERXNDL));
- } else {
- enc_w16(enc, CTL_REG_ERXRDPTL, rxbuf_rdpt);
- }
- /* read pktcnt */
- pkt_cnt = enc_r8(enc, CTL_REG_EPKTCNT);
- if (copy_len == 0) {
- (void)enc_r8(enc, CTL_REG_EIR);
- enc_reset_rx(enc);
- printf("%s: receive copy_len=0\n", enc->dev->name);
- continue;
- }
- /*
- * Because net_process_received_packet() might call enc_send(),
- * we need to release the SPI bus, call
- * net_process_received_packet(), reclaim the bus.
- */
- enc_release_bus(enc);
- net_process_received_packet(packet, pkt_len);
- if (enc_claim_bus(enc))
- return;
- (void)enc_r8(enc, CTL_REG_EIR);
- } while (pkt_cnt);
- /* Use EPKTCNT not EIR.PKTIF flag, see errata pt. 6 */
-}
-
-/*
- * Poll for completely received packets.
- */
-static void enc_poll(enc_dev_t *enc)
-{
- u8 eir_reg;
- u8 pkt_cnt;
-
- (void)enc_r8(enc, CTL_REG_ESTAT);
- eir_reg = enc_r8(enc, CTL_REG_EIR);
- if (eir_reg & ENC_EIR_TXIF) {
- /* clear TXIF bit in EIR */
- enc_bclr(enc, CTL_REG_EIR, ENC_EIR_TXIF);
- }
- /* We have to use pktcnt and not pktif bit, see errata pt. 6 */
- pkt_cnt = enc_r8(enc, CTL_REG_EPKTCNT);
- if (pkt_cnt > 0) {
- if ((eir_reg & ENC_EIR_PKTIF) == 0) {
- debug("enc_poll: pkt cnt > 0, but pktif not set\n");
- }
- enc_receive(enc);
- /*
- * clear PKTIF bit in EIR, this should not need to be done
- * but it seems like we get problems if we do not
- */
- enc_bclr(enc, CTL_REG_EIR, ENC_EIR_PKTIF);
- }
- if (eir_reg & ENC_EIR_RXERIF) {
- printf("%s: rx error\n", enc->dev->name);
- enc_bclr(enc, CTL_REG_EIR, ENC_EIR_RXERIF);
- }
- if (eir_reg & ENC_EIR_TXERIF) {
- printf("%s: tx error\n", enc->dev->name);
- enc_bclr(enc, CTL_REG_EIR, ENC_EIR_TXERIF);
- }
-}
-
-/*
- * Completely Reset the ENC
- */
-static void enc_reset(enc_dev_t *enc)
-{
- u8 dout[1];
-
- dout[0] = CMD_SRC;
- spi_xfer(enc->slave, 8, dout, NULL,
- SPI_XFER_BEGIN | SPI_XFER_END);
- /* sleep 1 ms. See errata pt. 2 */
- udelay(1000);
-}
-
-/*
- * Initialisation data for most of the ENC registers
- */
-static const u16 enc_initdata[] = {
- /*
- * Setup the buffer space. The reset values are valid for the
- * other pointers.
- *
- * We shall not write to ERXST, see errata pt. 5. Instead we
- * have to make sure that ENC_RX_BUS_START is 0.
- */
- CTL_REG_ERXSTL, ENC_RX_BUF_START,
- CTL_REG_ERXSTH, ENC_RX_BUF_START >> 8,
- CTL_REG_ERXNDL, ENC_RX_BUF_END,
- CTL_REG_ERXNDH, ENC_RX_BUF_END >> 8,
- CTL_REG_ERDPTL, ENC_RX_BUF_START,
- CTL_REG_ERDPTH, ENC_RX_BUF_START >> 8,
- /*
- * Set the filter to receive only good-CRC, unicast and broadcast
- * frames.
- * Note: some DHCP servers return their answers as broadcasts!
- * So its unwise to remove broadcast from this. This driver
- * might incur receiver overruns with packet loss on a broadcast
- * flooded network.
- */
- CTL_REG_ERXFCON, ENC_RFR_BCEN | ENC_RFR_UCEN | ENC_RFR_CRCEN,
-
- /* enable MAC to receive frames */
- CTL_REG_MACON1,
- ENC_MACON1_MARXEN | ENC_MACON1_TXPAUS | ENC_MACON1_RXPAUS,
-
- /* configure pad, tx-crc and duplex */
- CTL_REG_MACON3,
- ENC_MACON3_PADCFG0 | ENC_MACON3_TXCRCEN |
- ENC_MACON3_FRMLNEN,
-
- /* Allow infinite deferals if the medium is continously busy */
- CTL_REG_MACON4, ENC_MACON4_DEFER,
-
- /* Late collisions occur beyond 63 bytes */
- CTL_REG_MACLCON2, 63,
-
- /*
- * Set (low byte) Non-Back-to_Back Inter-Packet Gap.
- * Recommended 0x12
- */
- CTL_REG_MAIPGL, 0x12,
-
- /*
- * Set (high byte) Non-Back-to_Back Inter-Packet Gap.
- * Recommended 0x0c for half-duplex. Nothing for full-duplex
- */
- CTL_REG_MAIPGH, 0x0C,
-
- /* set maximum frame length */
- CTL_REG_MAMXFLL, ENC_MAX_FRM_LEN,
- CTL_REG_MAMXFLH, ENC_MAX_FRM_LEN >> 8,
-
- /*
- * Set MAC back-to-back inter-packet gap.
- * Recommended 0x12 for half duplex
- * and 0x15 for full duplex.
- */
- CTL_REG_MABBIPG, 0x12,
-
- /* end of table */
- 0xffff
-};
-
-/*
- * Wait for the XTAL oscillator to become ready
- */
-static int enc_clock_wait(enc_dev_t *enc)
-{
- uint64_t etime;
-
- /* one second timeout */
- etime = get_ticks() + get_tbclk();
-
- /*
- * Wait for CLKRDY to become set (i.e., check that we can
- * communicate with the ENC)
- */
- do
- {
- if (enc_r8(enc, CTL_REG_ESTAT) & ENC_ESTAT_CLKRDY)
- return 0;
- } while (get_ticks() <= etime);
-
- printf("%s: timeout waiting for CLKRDY\n", enc->dev->name);
- return -1;
-}
-
-/*
- * Write the MAC address into the ENC
- */
-static int enc_write_macaddr(enc_dev_t *enc)
-{
- unsigned char *p = enc->dev->enetaddr;
-
- enc_w8_retry(enc, CTL_REG_MAADR5, *p++, 5);
- enc_w8_retry(enc, CTL_REG_MAADR4, *p++, 5);
- enc_w8_retry(enc, CTL_REG_MAADR3, *p++, 5);
- enc_w8_retry(enc, CTL_REG_MAADR2, *p++, 5);
- enc_w8_retry(enc, CTL_REG_MAADR1, *p++, 5);
- enc_w8_retry(enc, CTL_REG_MAADR0, *p, 5);
- return 0;
-}
-
-/*
- * Setup most of the ENC registers
- */
-static int enc_setup(enc_dev_t *enc)
-{
- u16 phid1 = 0;
- u16 phid2 = 0;
- const u16 *tp;
-
- /* reset enc struct values */
- enc->next_pointer = ENC_RX_BUF_START;
- enc->rx_reset_counter = RX_RESET_COUNTER;
- enc->bank = 0xff; /* invalidate current bank in enc28j60 */
-
- /* verify PHY identification */
- phid1 = enc_phy_read(enc, PHY_REG_PHID1);
- phid2 = enc_phy_read(enc, PHY_REG_PHID2) & ENC_PHID2_MASK;
- if (phid1 != ENC_PHID1_VALUE || phid2 != ENC_PHID2_VALUE) {
- printf("%s: failed to identify PHY. Found %04x:%04x\n",
- enc->dev->name, phid1, phid2);
- return -1;
- }
-
- /* now program registers */
- for (tp = enc_initdata; *tp != 0xffff; tp += 2)
- enc_w8_retry(enc, tp[0], tp[1], 10);
-
- /*
- * Prevent automatic loopback of data beeing transmitted by setting
- * ENC_PHCON2_HDLDIS
- */
- enc_phy_write(enc, PHY_REG_PHCON2, (1<<8));
-
- /*
- * LEDs configuration
- * LEDA: LACFG = 0100 -> display link status
- * LEDB: LBCFG = 0111 -> display TX & RX activity
- * STRCH = 1 -> LED pulses
- */
- enc_phy_write(enc, PHY_REG_PHLCON, 0x0472);
-
- /* Reset PDPXMD-bit => half duplex */
- enc_phy_write(enc, PHY_REG_PHCON1, 0);
-
- return 0;
-}
-
-/*
- * Check if ENC has been initialized.
- * If not, try to initialize it.
- * Remember initialized state in struct.
- */
-static int enc_initcheck(enc_dev_t *enc, const enum enc_initstate requiredstate)
-{
- if (enc->initstate >= requiredstate)
- return 0;
-
- if (enc->initstate < setupdone) {
- /* Initialize the ENC only */
- enc_reset(enc);
- /* if any of functions fails, skip the rest and return an error */
- if (enc_clock_wait(enc) || enc_setup(enc) || enc_write_macaddr(enc)) {
- return -1;
- }
- enc->initstate = setupdone;
- }
- /* if that's all we need, return here */
- if (enc->initstate >= requiredstate)
- return 0;
-
- /* now wait for link ready condition */
- if (enc_phy_link_wait(enc)) {
- return -1;
- }
- enc->initstate = linkready;
- return 0;
-}
-
-#if defined(CONFIG_CMD_MII)
-/*
- * Read a PHY register.
- *
- * This function is registered with miiphy_register().
- */
-int enc_miiphy_read(struct mii_dev *bus, int phy_adr, int devad, int reg)
-{
- u16 value = 0;
- struct eth_device *dev = eth_get_dev_by_name(bus->name);
- enc_dev_t *enc;
-
- if (!dev || phy_adr != 0)
- return -1;
-
- enc = dev->priv;
- if (enc_claim_bus(enc))
- return -1;
- if (enc_initcheck(enc, setupdone)) {
- enc_release_bus(enc);
- return -1;
- }
- value = enc_phy_read(enc, reg);
- enc_release_bus(enc);
- return value;
-}
-
-/*
- * Write a PHY register.
- *
- * This function is registered with miiphy_register().
- */
-int enc_miiphy_write(struct mii_dev *bus, int phy_adr, int devad, int reg,
- u16 value)
-{
- struct eth_device *dev = eth_get_dev_by_name(bus->name);
- enc_dev_t *enc;
-
- if (!dev || phy_adr != 0)
- return -1;
-
- enc = dev->priv;
- if (enc_claim_bus(enc))
- return -1;
- if (enc_initcheck(enc, setupdone)) {
- enc_release_bus(enc);
- return -1;
- }
- enc_phy_write(enc, reg, value);
- enc_release_bus(enc);
- return 0;
-}
-#endif
-
-/*
- * Write hardware (MAC) address.
- *
- * This function entered into eth_device structure.
- */
-static int enc_write_hwaddr(struct eth_device *dev)
-{
- enc_dev_t *enc = dev->priv;
-
- if (enc_claim_bus(enc))
- return -1;
- if (enc_initcheck(enc, setupdone)) {
- enc_release_bus(enc);
- return -1;
- }
- enc_release_bus(enc);
- return 0;
-}
-
-/*
- * Initialize ENC28J60 for use.
- *
- * This function entered into eth_device structure.
- */
-static int enc_init(struct eth_device *dev, bd_t *bis)
-{
- enc_dev_t *enc = dev->priv;
-
- if (enc_claim_bus(enc))
- return -1;
- if (enc_initcheck(enc, linkready)) {
- enc_release_bus(enc);
- return -1;
- }
- /* enable receive */
- enc_bset(enc, CTL_REG_ECON1, ENC_ECON1_RXEN);
- enc_release_bus(enc);
- return 0;
-}
-
-/*
- * Check for received packets.
- *
- * This function entered into eth_device structure.
- */
-static int enc_recv(struct eth_device *dev)
-{
- enc_dev_t *enc = dev->priv;
-
- if (enc_claim_bus(enc))
- return -1;
- if (enc_initcheck(enc, linkready)) {
- enc_release_bus(enc);
- return -1;
- }
- /* Check for dead receiver */
- if (enc->rx_reset_counter > 0)
- enc->rx_reset_counter--;
- else
- enc_reset_rx_call(enc);
- enc_poll(enc);
- enc_release_bus(enc);
- return 0;
-}
-
-/*
- * Send a packet.
- *
- * This function entered into eth_device structure.
- *
- * Should we wait here until we have a Link? Or shall we leave that to
- * protocol retries?
- */
-static int enc_send(
- struct eth_device *dev,
- void *packet,
- int length)
-{
- enc_dev_t *enc = dev->priv;
-
- if (enc_claim_bus(enc))
- return -1;
- if (enc_initcheck(enc, linkready)) {
- enc_release_bus(enc);
- return -1;
- }
- /* setup transmit pointers */
- enc_w16(enc, CTL_REG_EWRPTL, ENC_TX_BUF_START);
- enc_w16(enc, CTL_REG_ETXNDL, length + ENC_TX_BUF_START);
- enc_w16(enc, CTL_REG_ETXSTL, ENC_TX_BUF_START);
- /* write packet to ENC */
- enc_wbuf(enc, length, (u8 *) packet, 0x00);
- /*
- * Check that the internal transmit logic has not been altered
- * by excessive collisions. Reset transmitter if so.
- * See Errata B4 12 and 14.
- */
- if (enc_r8(enc, CTL_REG_EIR) & ENC_EIR_TXERIF) {
- enc_bset(enc, CTL_REG_ECON1, ENC_ECON1_TXRST);
- enc_bclr(enc, CTL_REG_ECON1, ENC_ECON1_TXRST);
- }
- enc_bclr(enc, CTL_REG_EIR, (ENC_EIR_TXERIF | ENC_EIR_TXIF));
- /* start transmitting */
- enc_bset(enc, CTL_REG_ECON1, ENC_ECON1_TXRTS);
- enc_release_bus(enc);
- return 0;
-}
-
-/*
- * Finish use of ENC.
- *
- * This function entered into eth_device structure.
- */
-static void enc_halt(struct eth_device *dev)
-{
- enc_dev_t *enc = dev->priv;
-
- if (enc_claim_bus(enc))
- return;
- /* Just disable receiver */
- enc_bclr(enc, CTL_REG_ECON1, ENC_ECON1_RXEN);
- enc_release_bus(enc);
-}
-
-/*
- * This is the only exported function.
- *
- * It may be called several times with different bus:cs combinations.
- */
-int enc28j60_initialize(unsigned int bus, unsigned int cs,
- unsigned int max_hz, unsigned int mode)
-{
- struct eth_device *dev;
- enc_dev_t *enc;
-
- /* try to allocate, check and clear eth_device object */
- dev = malloc(sizeof(*dev));
- if (!dev) {
- return -1;
- }
- memset(dev, 0, sizeof(*dev));
-
- /* try to allocate, check and clear enc_dev_t object */
- enc = malloc(sizeof(*enc));
- if (!enc) {
- free(dev);
- return -1;
- }
- memset(enc, 0, sizeof(*enc));
-
- /* try to setup the SPI slave */
- enc->slave = spi_setup_slave(bus, cs, max_hz, mode);
- if (!enc->slave) {
- printf("enc28j60: invalid SPI device %i:%i\n", bus, cs);
- free(enc);
- free(dev);
- return -1;
- }
-
- enc->dev = dev;
- /* now fill the eth_device object */
- dev->priv = enc;
- dev->init = enc_init;
- dev->halt = enc_halt;
- dev->send = enc_send;
- dev->recv = enc_recv;
- dev->write_hwaddr = enc_write_hwaddr;
- sprintf(dev->name, "enc%i.%i", bus, cs);
- eth_register(dev);
-#if defined(CONFIG_CMD_MII)
- int retval;
- struct mii_dev *mdiodev = mdio_alloc();
- if (!mdiodev)
- return -ENOMEM;
- strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
- mdiodev->read = enc_miiphy_read;
- mdiodev->write = enc_miiphy_write;
-
- retval = mdio_register(mdiodev);
- if (retval < 0)
- return retval;
-#endif
- return 0;
-}
+++ /dev/null
-/*
- * (X) extracted from enc28j60.c
- * Reinhard Meyer, EMK Elektronik, reinhard.meyer@emk-elektronik.de
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
-
-#ifndef _enc28j60_h
-#define _enc28j60_h
-
-/*
- * SPI Commands
- *
- * Bits 7-5: Command
- * Bits 4-0: Register
- */
-#define CMD_RCR(x) (0x00+((x)&0x1f)) /* Read Control Register */
-#define CMD_RBM 0x3a /* Read Buffer Memory */
-#define CMD_WCR(x) (0x40+((x)&0x1f)) /* Write Control Register */
-#define CMD_WBM 0x7a /* Write Buffer Memory */
-#define CMD_BFS(x) (0x80+((x)&0x1f)) /* Bit Field Set */
-#define CMD_BFC(x) (0xa0+((x)&0x1f)) /* Bit Field Clear */
-#define CMD_SRC 0xff /* System Reset Command */
-
-/* NEW: encode (bank number+1) in upper byte */
-
-/* Common Control Registers accessible in all Banks */
-#define CTL_REG_EIE 0x01B
-#define CTL_REG_EIR 0x01C
-#define CTL_REG_ESTAT 0x01D
-#define CTL_REG_ECON2 0x01E
-#define CTL_REG_ECON1 0x01F
-
-/* Control Registers accessible in Bank 0 */
-#define CTL_REG_ERDPTL 0x100
-#define CTL_REG_ERDPTH 0x101
-#define CTL_REG_EWRPTL 0x102
-#define CTL_REG_EWRPTH 0x103
-#define CTL_REG_ETXSTL 0x104
-#define CTL_REG_ETXSTH 0x105
-#define CTL_REG_ETXNDL 0x106
-#define CTL_REG_ETXNDH 0x107
-#define CTL_REG_ERXSTL 0x108
-#define CTL_REG_ERXSTH 0x109
-#define CTL_REG_ERXNDL 0x10A
-#define CTL_REG_ERXNDH 0x10B
-#define CTL_REG_ERXRDPTL 0x10C
-#define CTL_REG_ERXRDPTH 0x10D
-#define CTL_REG_ERXWRPTL 0x10E
-#define CTL_REG_ERXWRPTH 0x10F
-#define CTL_REG_EDMASTL 0x110
-#define CTL_REG_EDMASTH 0x111
-#define CTL_REG_EDMANDL 0x112
-#define CTL_REG_EDMANDH 0x113
-#define CTL_REG_EDMADSTL 0x114
-#define CTL_REG_EDMADSTH 0x115
-#define CTL_REG_EDMACSL 0x116
-#define CTL_REG_EDMACSH 0x117
-
-/* Control Registers accessible in Bank 1 */
-#define CTL_REG_EHT0 0x200
-#define CTL_REG_EHT1 0x201
-#define CTL_REG_EHT2 0x202
-#define CTL_REG_EHT3 0x203
-#define CTL_REG_EHT4 0x204
-#define CTL_REG_EHT5 0x205
-#define CTL_REG_EHT6 0x206
-#define CTL_REG_EHT7 0x207
-#define CTL_REG_EPMM0 0x208
-#define CTL_REG_EPMM1 0x209
-#define CTL_REG_EPMM2 0x20A
-#define CTL_REG_EPMM3 0x20B
-#define CTL_REG_EPMM4 0x20C
-#define CTL_REG_EPMM5 0x20D
-#define CTL_REG_EPMM6 0x20E
-#define CTL_REG_EPMM7 0x20F
-#define CTL_REG_EPMCSL 0x210
-#define CTL_REG_EPMCSH 0x211
-#define CTL_REG_EPMOL 0x214
-#define CTL_REG_EPMOH 0x215
-#define CTL_REG_EWOLIE 0x216
-#define CTL_REG_EWOLIR 0x217
-#define CTL_REG_ERXFCON 0x218
-#define CTL_REG_EPKTCNT 0x219
-
-/* Control Registers accessible in Bank 2 */
-#define CTL_REG_MACON1 0x300
-#define CTL_REG_MACON2 0x301
-#define CTL_REG_MACON3 0x302
-#define CTL_REG_MACON4 0x303
-#define CTL_REG_MABBIPG 0x304
-#define CTL_REG_MAIPGL 0x306
-#define CTL_REG_MAIPGH 0x307
-#define CTL_REG_MACLCON1 0x308
-#define CTL_REG_MACLCON2 0x309
-#define CTL_REG_MAMXFLL 0x30A
-#define CTL_REG_MAMXFLH 0x30B
-#define CTL_REG_MAPHSUP 0x30D
-#define CTL_REG_MICON 0x311
-#define CTL_REG_MICMD 0x312
-#define CTL_REG_MIREGADR 0x314
-#define CTL_REG_MIWRL 0x316
-#define CTL_REG_MIWRH 0x317
-#define CTL_REG_MIRDL 0x318
-#define CTL_REG_MIRDH 0x319
-
-/* Control Registers accessible in Bank 3 */
-#define CTL_REG_MAADR1 0x400
-#define CTL_REG_MAADR0 0x401
-#define CTL_REG_MAADR3 0x402
-#define CTL_REG_MAADR2 0x403
-#define CTL_REG_MAADR5 0x404
-#define CTL_REG_MAADR4 0x405
-#define CTL_REG_EBSTSD 0x406
-#define CTL_REG_EBSTCON 0x407
-#define CTL_REG_EBSTCSL 0x408
-#define CTL_REG_EBSTCSH 0x409
-#define CTL_REG_MISTAT 0x40A
-#define CTL_REG_EREVID 0x412
-#define CTL_REG_ECOCON 0x415
-#define CTL_REG_EFLOCON 0x417
-#define CTL_REG_EPAUSL 0x418
-#define CTL_REG_EPAUSH 0x419
-
-/* PHY Register */
-#define PHY_REG_PHCON1 0x00
-#define PHY_REG_PHSTAT1 0x01
-#define PHY_REG_PHID1 0x02
-#define PHY_REG_PHID2 0x03
-#define PHY_REG_PHCON2 0x10
-#define PHY_REG_PHSTAT2 0x11
-#define PHY_REG_PHLCON 0x14
-
-/* Receive Filter Register (ERXFCON) bits */
-#define ENC_RFR_UCEN 0x80
-#define ENC_RFR_ANDOR 0x40
-#define ENC_RFR_CRCEN 0x20
-#define ENC_RFR_PMEN 0x10
-#define ENC_RFR_MPEN 0x08
-#define ENC_RFR_HTEN 0x04
-#define ENC_RFR_MCEN 0x02
-#define ENC_RFR_BCEN 0x01
-
-/* ECON1 Register Bits */
-#define ENC_ECON1_TXRST 0x80
-#define ENC_ECON1_RXRST 0x40
-#define ENC_ECON1_DMAST 0x20
-#define ENC_ECON1_CSUMEN 0x10
-#define ENC_ECON1_TXRTS 0x08
-#define ENC_ECON1_RXEN 0x04
-#define ENC_ECON1_BSEL1 0x02
-#define ENC_ECON1_BSEL0 0x01
-
-/* ECON2 Register Bits */
-#define ENC_ECON2_AUTOINC 0x80
-#define ENC_ECON2_PKTDEC 0x40
-#define ENC_ECON2_PWRSV 0x20
-#define ENC_ECON2_VRPS 0x08
-
-/* EIR Register Bits */
-#define ENC_EIR_PKTIF 0x40
-#define ENC_EIR_DMAIF 0x20
-#define ENC_EIR_LINKIF 0x10
-#define ENC_EIR_TXIF 0x08
-#define ENC_EIR_WOLIF 0x04
-#define ENC_EIR_TXERIF 0x02
-#define ENC_EIR_RXERIF 0x01
-
-/* ESTAT Register Bits */
-#define ENC_ESTAT_INT 0x80
-#define ENC_ESTAT_LATECOL 0x10
-#define ENC_ESTAT_RXBUSY 0x04
-#define ENC_ESTAT_TXABRT 0x02
-#define ENC_ESTAT_CLKRDY 0x01
-
-/* EIE Register Bits */
-#define ENC_EIE_INTIE 0x80
-#define ENC_EIE_PKTIE 0x40
-#define ENC_EIE_DMAIE 0x20
-#define ENC_EIE_LINKIE 0x10
-#define ENC_EIE_TXIE 0x08
-#define ENC_EIE_WOLIE 0x04
-#define ENC_EIE_TXERIE 0x02
-#define ENC_EIE_RXERIE 0x01
-
-/* MACON1 Register Bits */
-#define ENC_MACON1_LOOPBK 0x10
-#define ENC_MACON1_TXPAUS 0x08
-#define ENC_MACON1_RXPAUS 0x04
-#define ENC_MACON1_PASSALL 0x02
-#define ENC_MACON1_MARXEN 0x01
-
-/* MACON2 Register Bits */
-#define ENC_MACON2_MARST 0x80
-#define ENC_MACON2_RNDRST 0x40
-#define ENC_MACON2_MARXRST 0x08
-#define ENC_MACON2_RFUNRST 0x04
-#define ENC_MACON2_MATXRST 0x02
-#define ENC_MACON2_TFUNRST 0x01
-
-/* MACON3 Register Bits */
-#define ENC_MACON3_PADCFG2 0x80
-#define ENC_MACON3_PADCFG1 0x40
-#define ENC_MACON3_PADCFG0 0x20
-#define ENC_MACON3_TXCRCEN 0x10
-#define ENC_MACON3_PHDRLEN 0x08
-#define ENC_MACON3_HFRMEN 0x04
-#define ENC_MACON3_FRMLNEN 0x02
-#define ENC_MACON3_FULDPX 0x01
-
-/* MACON4 Register Bits */
-#define ENC_MACON4_DEFER 0x40
-
-/* MICMD Register Bits */
-#define ENC_MICMD_MIISCAN 0x02
-#define ENC_MICMD_MIIRD 0x01
-
-/* MISTAT Register Bits */
-#define ENC_MISTAT_NVALID 0x04
-#define ENC_MISTAT_SCAN 0x02
-#define ENC_MISTAT_BUSY 0x01
-
-/* PHID1 and PHID2 values */
-#define ENC_PHID1_VALUE 0x0083
-#define ENC_PHID2_VALUE 0x1400
-#define ENC_PHID2_MASK 0xFC00
-
-/* PHCON1 values */
-#define ENC_PHCON1_PDPXMD 0x0100
-
-/* PHSTAT1 values */
-#define ENC_PHSTAT1_LLSTAT 0x0004
-
-/* PHSTAT2 values */
-#define ENC_PHSTAT2_LSTAT 0x0400
-#define ENC_PHSTAT2_DPXSTAT 0x0200
-
-#endif
projects / platform / kernel / u-boot.git / commitdiff