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u-boot/drivers/net/ethoc.c
Joe Hershberger 1fd92db83d net: cosmetic: Fix var naming net <-> eth drivers 
Update the naming convention used in the network stack functions and
variables that Ethernet drivers use to interact with it.

This cleans up the temporary hacks that were added to this interface
along with the DM support.

This patch has a few remaining checkpatch.pl failures that would be out
of the scope of this patch to fix (drivers that are in gross violation
of checkpatch.pl).

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Acked-by: Simon Glass <sjg@chromium.org>
2015-04-18 11:11:33 -06:00

512 lines
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/*
* Opencore 10/100 ethernet mac driver
*
* Copyright (C) 2007-2008 Avionic Design Development GmbH
* Copyright (C) 2008-2009 Avionic Design GmbH
* Thierry Reding <thierry.reding@avionic-design.de>
* Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <common.h>
#include <command.h>
#include <malloc.h>
#include <net.h>
#include <miiphy.h>
#include <asm/io.h>
#include <asm/cache.h>
/* register offsets */
#define MODER 0x00
#define INT_SOURCE 0x04
#define INT_MASK 0x08
#define IPGT 0x0c
#define IPGR1 0x10
#define IPGR2 0x14
#define PACKETLEN 0x18
#define COLLCONF 0x1c
#define TX_BD_NUM 0x20
#define CTRLMODER 0x24
#define MIIMODER 0x28
#define MIICOMMAND 0x2c
#define MIIADDRESS 0x30
#define MIITX_DATA 0x34
#define MIIRX_DATA 0x38
#define MIISTATUS 0x3c
#define MAC_ADDR0 0x40
#define MAC_ADDR1 0x44
#define ETH_HASH0 0x48
#define ETH_HASH1 0x4c
#define ETH_TXCTRL 0x50
/* mode register */
#define MODER_RXEN (1 << 0) /* receive enable */
#define MODER_TXEN (1 << 1) /* transmit enable */
#define MODER_NOPRE (1 << 2) /* no preamble */
#define MODER_BRO (1 << 3) /* broadcast address */
#define MODER_IAM (1 << 4) /* individual address mode */
#define MODER_PRO (1 << 5) /* promiscuous mode */
#define MODER_IFG (1 << 6) /* interframe gap for incoming frames */
#define MODER_LOOP (1 << 7) /* loopback */
#define MODER_NBO (1 << 8) /* no back-off */
#define MODER_EDE (1 << 9) /* excess defer enable */
#define MODER_FULLD (1 << 10) /* full duplex */
#define MODER_RESET (1 << 11) /* FIXME: reset (undocumented) */
#define MODER_DCRC (1 << 12) /* delayed CRC enable */
#define MODER_CRC (1 << 13) /* CRC enable */
#define MODER_HUGE (1 << 14) /* huge packets enable */
#define MODER_PAD (1 << 15) /* padding enabled */
#define MODER_RSM (1 << 16) /* receive small packets */
/* interrupt source and mask registers */
#define INT_MASK_TXF (1 << 0) /* transmit frame */
#define INT_MASK_TXE (1 << 1) /* transmit error */
#define INT_MASK_RXF (1 << 2) /* receive frame */
#define INT_MASK_RXE (1 << 3) /* receive error */
#define INT_MASK_BUSY (1 << 4)
#define INT_MASK_TXC (1 << 5) /* transmit control frame */
#define INT_MASK_RXC (1 << 6) /* receive control frame */
#define INT_MASK_TX (INT_MASK_TXF | INT_MASK_TXE)
#define INT_MASK_RX (INT_MASK_RXF | INT_MASK_RXE)
#define INT_MASK_ALL ( \
INT_MASK_TXF | INT_MASK_TXE | \
INT_MASK_RXF | INT_MASK_RXE | \
INT_MASK_TXC | INT_MASK_RXC | \
INT_MASK_BUSY \
)
/* packet length register */
#define PACKETLEN_MIN(min) (((min) & 0xffff) << 16)
#define PACKETLEN_MAX(max) (((max) & 0xffff) << 0)
#define PACKETLEN_MIN_MAX(min, max) (PACKETLEN_MIN(min) | \
PACKETLEN_MAX(max))
/* transmit buffer number register */
#define TX_BD_NUM_VAL(x) (((x) <= 0x80) ? (x) : 0x80)
/* control module mode register */
#define CTRLMODER_PASSALL (1 << 0) /* pass all receive frames */
#define CTRLMODER_RXFLOW (1 << 1) /* receive control flow */
#define CTRLMODER_TXFLOW (1 << 2) /* transmit control flow */
/* MII mode register */
#define MIIMODER_CLKDIV(x) ((x) & 0xfe) /* needs to be an even number */
#define MIIMODER_NOPRE (1 << 8) /* no preamble */
/* MII command register */
#define MIICOMMAND_SCAN (1 << 0) /* scan status */
#define MIICOMMAND_READ (1 << 1) /* read status */
#define MIICOMMAND_WRITE (1 << 2) /* write control data */
/* MII address register */
#define MIIADDRESS_FIAD(x) (((x) & 0x1f) << 0)
#define MIIADDRESS_RGAD(x) (((x) & 0x1f) << 8)
#define MIIADDRESS_ADDR(phy, reg) (MIIADDRESS_FIAD(phy) | \
MIIADDRESS_RGAD(reg))
/* MII transmit data register */
#define MIITX_DATA_VAL(x) ((x) & 0xffff)
/* MII receive data register */
#define MIIRX_DATA_VAL(x) ((x) & 0xffff)
/* MII status register */
#define MIISTATUS_LINKFAIL (1 << 0)
#define MIISTATUS_BUSY (1 << 1)
#define MIISTATUS_INVALID (1 << 2)
/* TX buffer descriptor */
#define TX_BD_CS (1 << 0) /* carrier sense lost */
#define TX_BD_DF (1 << 1) /* defer indication */
#define TX_BD_LC (1 << 2) /* late collision */
#define TX_BD_RL (1 << 3) /* retransmission limit */
#define TX_BD_RETRY_MASK (0x00f0)
#define TX_BD_RETRY(x) (((x) & 0x00f0) >> 4)
#define TX_BD_UR (1 << 8) /* transmitter underrun */
#define TX_BD_CRC (1 << 11) /* TX CRC enable */
#define TX_BD_PAD (1 << 12) /* pad enable */
#define TX_BD_WRAP (1 << 13)
#define TX_BD_IRQ (1 << 14) /* interrupt request enable */
#define TX_BD_READY (1 << 15) /* TX buffer ready */
#define TX_BD_LEN(x) (((x) & 0xffff) << 16)
#define TX_BD_LEN_MASK (0xffff << 16)
#define TX_BD_STATS (TX_BD_CS | TX_BD_DF | TX_BD_LC | \
TX_BD_RL | TX_BD_RETRY_MASK | TX_BD_UR)
/* RX buffer descriptor */
#define RX_BD_LC (1 << 0) /* late collision */
#define RX_BD_CRC (1 << 1) /* RX CRC error */
#define RX_BD_SF (1 << 2) /* short frame */
#define RX_BD_TL (1 << 3) /* too long */
#define RX_BD_DN (1 << 4) /* dribble nibble */
#define RX_BD_IS (1 << 5) /* invalid symbol */
#define RX_BD_OR (1 << 6) /* receiver overrun */
#define RX_BD_MISS (1 << 7)
#define RX_BD_CF (1 << 8) /* control frame */
#define RX_BD_WRAP (1 << 13)
#define RX_BD_IRQ (1 << 14) /* interrupt request enable */
#define RX_BD_EMPTY (1 << 15)
#define RX_BD_LEN(x) (((x) & 0xffff) << 16)
#define RX_BD_STATS (RX_BD_LC | RX_BD_CRC | RX_BD_SF | RX_BD_TL | \
RX_BD_DN | RX_BD_IS | RX_BD_OR | RX_BD_MISS)
#define ETHOC_BUFSIZ 1536
#define ETHOC_ZLEN 64
#define ETHOC_BD_BASE 0x400
#define ETHOC_TIMEOUT (HZ / 2)
#define ETHOC_MII_TIMEOUT (1 + (HZ / 5))
/**
* struct ethoc - driver-private device structure
* @num_tx: number of send buffers
* @cur_tx: last send buffer written
* @dty_tx: last buffer actually sent
* @num_rx: number of receive buffers
* @cur_rx: current receive buffer
*/
struct ethoc {
u32 num_tx;
u32 cur_tx;
u32 dty_tx;
u32 num_rx;
u32 cur_rx;
};
/**
* struct ethoc_bd - buffer descriptor
* @stat: buffer statistics
* @addr: physical memory address
*/
struct ethoc_bd {
u32 stat;
u32 addr;
};
static inline u32 ethoc_read(struct eth_device *dev, size_t offset)
{
return readl(dev->iobase + offset);
}
static inline void ethoc_write(struct eth_device *dev, size_t offset, u32 data)
{
writel(data, dev->iobase + offset);
}
static inline void ethoc_read_bd(struct eth_device *dev, int index,
struct ethoc_bd *bd)
{
size_t offset = ETHOC_BD_BASE + (index * sizeof(struct ethoc_bd));
bd->stat = ethoc_read(dev, offset + 0);
bd->addr = ethoc_read(dev, offset + 4);
}
static inline void ethoc_write_bd(struct eth_device *dev, int index,
const struct ethoc_bd *bd)
{
size_t offset = ETHOC_BD_BASE + (index * sizeof(struct ethoc_bd));
ethoc_write(dev, offset + 0, bd->stat);
ethoc_write(dev, offset + 4, bd->addr);
}
static int ethoc_set_mac_address(struct eth_device *dev)
{
u8 *mac = dev->enetaddr;
ethoc_write(dev, MAC_ADDR0, (mac[2] << 24) | (mac[3] << 16) |
(mac[4] << 8) | (mac[5] << 0));
ethoc_write(dev, MAC_ADDR1, (mac[0] << 8) | (mac[1] << 0));
return 0;
}
static inline void ethoc_ack_irq(struct eth_device *dev, u32 mask)
{
ethoc_write(dev, INT_SOURCE, mask);
}
static inline void ethoc_enable_rx_and_tx(struct eth_device *dev)
{
u32 mode = ethoc_read(dev, MODER);
mode |= MODER_RXEN | MODER_TXEN;
ethoc_write(dev, MODER, mode);
}
static inline void ethoc_disable_rx_and_tx(struct eth_device *dev)
{
u32 mode = ethoc_read(dev, MODER);
mode &= ~(MODER_RXEN | MODER_TXEN);
ethoc_write(dev, MODER, mode);
}
static int ethoc_init_ring(struct eth_device *dev)
{
struct ethoc *priv = (struct ethoc *)dev->priv;
struct ethoc_bd bd;
int i;
priv->cur_tx = 0;
priv->dty_tx = 0;
priv->cur_rx = 0;
/* setup transmission buffers */
bd.stat = TX_BD_IRQ | TX_BD_CRC;
for (i = 0; i < priv->num_tx; i++) {
if (i == priv->num_tx - 1)
bd.stat |= TX_BD_WRAP;
ethoc_write_bd(dev, i, &bd);
}
bd.stat = RX_BD_EMPTY | RX_BD_IRQ;
for (i = 0; i < priv->num_rx; i++) {
bd.addr = (u32)net_rx_packets[i];
if (i == priv->num_rx - 1)
bd.stat |= RX_BD_WRAP;
flush_dcache_range(bd.addr, bd.addr + PKTSIZE_ALIGN);
ethoc_write_bd(dev, priv->num_tx + i, &bd);
}
return 0;
}
static int ethoc_reset(struct eth_device *dev)
{
u32 mode;
/* TODO: reset controller? */
ethoc_disable_rx_and_tx(dev);
/* TODO: setup registers */
/* enable FCS generation and automatic padding */
mode = ethoc_read(dev, MODER);
mode |= MODER_CRC | MODER_PAD;
ethoc_write(dev, MODER, mode);
/* set full-duplex mode */
mode = ethoc_read(dev, MODER);
mode |= MODER_FULLD;
ethoc_write(dev, MODER, mode);
ethoc_write(dev, IPGT, 0x15);
ethoc_ack_irq(dev, INT_MASK_ALL);
ethoc_enable_rx_and_tx(dev);
return 0;
}
static int ethoc_init(struct eth_device *dev, bd_t * bd)
{
struct ethoc *priv = (struct ethoc *)dev->priv;
printf("ethoc\n");
priv->num_tx = 1;
priv->num_rx = PKTBUFSRX;
ethoc_write(dev, TX_BD_NUM, priv->num_tx);
ethoc_init_ring(dev);
ethoc_reset(dev);
return 0;
}
static int ethoc_update_rx_stats(struct ethoc_bd *bd)
{
int ret = 0;
if (bd->stat & RX_BD_TL) {
debug("ETHOC: " "RX: frame too long\n");
ret++;
}
if (bd->stat & RX_BD_SF) {
debug("ETHOC: " "RX: frame too short\n");
ret++;
}
if (bd->stat & RX_BD_DN)
debug("ETHOC: " "RX: dribble nibble\n");
if (bd->stat & RX_BD_CRC) {
debug("ETHOC: " "RX: wrong CRC\n");
ret++;
}
if (bd->stat & RX_BD_OR) {
debug("ETHOC: " "RX: overrun\n");
ret++;
}
if (bd->stat & RX_BD_LC) {
debug("ETHOC: " "RX: late collision\n");
ret++;
}
return ret;
}
static int ethoc_rx(struct eth_device *dev, int limit)
{
struct ethoc *priv = (struct ethoc *)dev->priv;
int count;
for (count = 0; count < limit; ++count) {
u32 entry;
struct ethoc_bd bd;
entry = priv->num_tx + (priv->cur_rx % priv->num_rx);
ethoc_read_bd(dev, entry, &bd);
if (bd.stat & RX_BD_EMPTY)
break;
debug("%s(): RX buffer %d, %x received\n",
__func__, priv->cur_rx, bd.stat);
if (ethoc_update_rx_stats(&bd) == 0) {
int size = bd.stat >> 16;
size -= 4; /* strip the CRC */
net_process_received_packet((void *)bd.addr, size);
}
/* clear the buffer descriptor so it can be reused */
flush_dcache_range(bd.addr, bd.addr + PKTSIZE_ALIGN);
bd.stat &= ~RX_BD_STATS;
bd.stat |= RX_BD_EMPTY;
ethoc_write_bd(dev, entry, &bd);
priv->cur_rx++;
}
return count;
}
static int ethoc_update_tx_stats(struct ethoc_bd *bd)
{
if (bd->stat & TX_BD_LC)
debug("ETHOC: " "TX: late collision\n");
if (bd->stat & TX_BD_RL)
debug("ETHOC: " "TX: retransmit limit\n");
if (bd->stat & TX_BD_UR)
debug("ETHOC: " "TX: underrun\n");
if (bd->stat & TX_BD_CS)
debug("ETHOC: " "TX: carrier sense lost\n");
return 0;
}
static void ethoc_tx(struct eth_device *dev)
{
struct ethoc *priv = (struct ethoc *)dev->priv;
u32 entry = priv->dty_tx % priv->num_tx;
struct ethoc_bd bd;
ethoc_read_bd(dev, entry, &bd);
if ((bd.stat & TX_BD_READY) == 0)
(void)ethoc_update_tx_stats(&bd);
}
static int ethoc_send(struct eth_device *dev, void *packet, int length)
{
struct ethoc *priv = (struct ethoc *)dev->priv;
struct ethoc_bd bd;
u32 entry;
u32 pending;
int tmo;
entry = priv->cur_tx % priv->num_tx;
ethoc_read_bd(dev, entry, &bd);
if (unlikely(length < ETHOC_ZLEN))
bd.stat |= TX_BD_PAD;
else
bd.stat &= ~TX_BD_PAD;
bd.addr = (u32)packet;
flush_dcache_range(bd.addr, bd.addr + length);
bd.stat &= ~(TX_BD_STATS | TX_BD_LEN_MASK);
bd.stat |= TX_BD_LEN(length);
ethoc_write_bd(dev, entry, &bd);
/* start transmit */
bd.stat |= TX_BD_READY;
ethoc_write_bd(dev, entry, &bd);
/* wait for transfer to succeed */
tmo = get_timer(0) + 5 * CONFIG_SYS_HZ;
while (1) {
pending = ethoc_read(dev, INT_SOURCE);
ethoc_ack_irq(dev, pending & ~INT_MASK_RX);
if (pending & INT_MASK_BUSY)
debug("%s(): packet dropped\n", __func__);
if (pending & INT_MASK_TX) {
ethoc_tx(dev);
break;
}
if (get_timer(0) >= tmo) {
debug("%s(): timed out\n", __func__);
return -1;
}
}
debug("%s(): packet sent\n", __func__);
return 0;
}
static void ethoc_halt(struct eth_device *dev)
{
ethoc_disable_rx_and_tx(dev);
}
static int ethoc_recv(struct eth_device *dev)
{
u32 pending;
pending = ethoc_read(dev, INT_SOURCE);
ethoc_ack_irq(dev, pending);
if (pending & INT_MASK_BUSY)
debug("%s(): packet dropped\n", __func__);
if (pending & INT_MASK_RX) {
debug("%s(): rx irq\n", __func__);
ethoc_rx(dev, PKTBUFSRX);
}
return 0;
}
int ethoc_initialize(u8 dev_num, int base_addr)
{
struct ethoc *priv;
struct eth_device *dev;
priv = malloc(sizeof(*priv));
if (!priv)
return 0;
dev = malloc(sizeof(*dev));
if (!dev) {
free(priv);
return 0;
}
memset(dev, 0, sizeof(*dev));
dev->priv = priv;
dev->iobase = base_addr;
dev->init = ethoc_init;
dev->halt = ethoc_halt;
dev->send = ethoc_send;
dev->recv = ethoc_recv;
dev->write_hwaddr = ethoc_set_mac_address;
sprintf(dev->name, "%s-%hu", "ETHOC", dev_num);
eth_register(dev);
return 1;
}
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