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openwrt-xburst/target/linux/xburst/files-2.6.27/drivers/net/jz4760_eth.c
Mirko Vogt dc3d3f1c49 yet another patchset - 2.6.27 
it's basically also provided by ingenic and nativly based on 2.6.27,
adjusted to fit into the OpenWrt-environment
2009-10-28 03:13:11 +08:00

1756 lines
46 KiB
C
Raw Blame History

/*
* linux/drivers/net/jz4760_eth.c
*
* Jz4760 On-Chip ethernet driver.
*
* Copyright (C) 2005 - 2007 Ingenic Semiconductor Inc.
*
* 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.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/mii.h>
#include <linux/skbuff.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/kthread.h>
#include <asm/io.h>
#include <asm/addrspace.h>
#include <asm/uaccess.h>
#include <asm/cacheflush.h>
#include <asm/cacheops.h>
#include <asm/jzsoc.h>
#include "jz4760_eth.h"
#define P2ADDR(a) (((unsigned long)(a) & 0x1fffffff) | 0xa0000000)
#define P1ADDR(a) (((unsigned long)(a) & 0x1fffffff) | 0x80000000)
//#define USE_RMII 1
//#define ETH_DEBUG
#ifdef ETH_DEBUG
# define DBPRINTK(fmt,args...) printk(KERN_DEBUG fmt,##args)
#else
# define DBPRINTK(fmt,args...) do {} while(0)
#endif
#define errprintk(fmt,args...) printk(KERN_ERR fmt,##args);
#define infoprintk(fmt,args...) printk(KERN_INFO fmt,##args);
#define DRV_NAME "jz4760_eth"
#define DRV_VERSION "0.1"
#define DRV_AUTHOR "Jason Wang <xwang@ingenic.cn>"
#define DRV_DESC "JzSOC 4760 On-chip Ethernet driver"
MODULE_AUTHOR(DRV_AUTHOR);
MODULE_DESCRIPTION(DRV_DESC);
MODULE_LICENSE("GPL");
/*
* Local variables
*/
static struct net_device *netdev;
static char * hwaddr = NULL;
static int debug = -1;
static struct mii_if_info mii_info;
MODULE_PARM_DESC(debug, "i");
MODULE_PARM_DESC(hwaddr,"s");
/*
* Local routines
*/
static irqreturn_t jz_eth_interrupt(int irq, void *dev_id);
static int link_check_thread (void *data);
#if 0
/*
* Get MAC address
*/
#define I2C_DEVICE 0x57
#define MAC_OFFSET 64
extern void i2c_open(void);
extern void i2c_close(void);
extern int i2c_read(unsigned char device, unsigned char *buf,
unsigned char address, int count);
#endif
static inline unsigned char str2hexnum(unsigned char c)
{
if (c >= '0' && c <= '9')
return c - '0';
if (c >= 'a' && c <= 'f')
return c - 'a' + 10;
if (c >= 'A' && c <= 'F')
return c - 'A' + 10;
return 0; /* foo */
}
static inline void str2eaddr(unsigned char *ea, unsigned char *str)
{
int i;
for (i = 0; i < 6; i++) {
unsigned char num;
if((*str == '.') || (*str == ':'))
str++;
num = str2hexnum(*str++) << 4;
num |= (str2hexnum(*str++));
ea[i] = num;
}
}
static int ethaddr_cmd = 0;
static unsigned char ethaddr_hex[6];
static int __init ethernet_addr_setup(char *str)
{
if (!str) {
printk("ethaddr not set in command line\n");
return -1;
}
ethaddr_cmd = 1;
str2eaddr(ethaddr_hex, str);
return 0;
}
__setup("ethaddr=", ethernet_addr_setup);
static int get_mac_address(struct net_device *dev)
{
int i;
unsigned char flag0=0;
unsigned char flag1=0xff;
dev->dev_addr[0] = 0xff;
if (hwaddr != NULL) {
/* insmod jz-ethc.o hwaddr=00:ef:a3:c1:00:10 */
str2eaddr(dev->dev_addr, hwaddr);
} else if (ethaddr_cmd) {
/* linux command line: ethaddr=00:ef:a3:c1:00:10 */
for (i=0; i<6; i++)
dev->dev_addr[i] = ethaddr_hex[i];
} else {
#if 0
/* mac address in eeprom: byte 0x40-0x45 */
i2c_open();
i2c_read(I2C_DEVICE, dev->dev_addr, MAC_OFFSET, 6);
i2c_close();
#endif
}
/* check whether valid MAC address */
for (i=0; i<6; i++) {
flag0 |= dev->dev_addr[i];
flag1 &= dev->dev_addr[i];
}
if ((dev->dev_addr[0] & 0xC0) || (flag0 == 0) || (flag1 == 0xff)) {
printk("WARNING: There is not MAC address, use default ..\n");
dev->dev_addr[0] = 0x00;
dev->dev_addr[1] = 0xef;
dev->dev_addr[2] = 0xa3;
dev->dev_addr[3] = 0xc1;
dev->dev_addr[4] = 0x00;
dev->dev_addr[5] = 0x10;
dev->dev_addr[5] = 0x03;
}
printk("get_mac_address return ...\n");
return 0;
}
/*---------------------------------------------------------------------*/
static u32 jz_eth_curr_mode(struct net_device *dev);
/*
* Link check routines
*/
static void start_check(struct net_device *dev)
{
struct jz_eth_private *np = (struct jz_eth_private *)dev->priv;
struct task_struct *t;
np->thread_die = 0;
init_waitqueue_head(&np->thr_wait);
init_completion(&np->thr_exited);
t = kthread_create(link_check_thread,(void *)dev, dev->name);
if (IS_ERR(t))
errprintk("%s: unable to start kernel thread\n",dev->name);
np->thread = t;
}
static int close_check(struct net_device *dev)
{
struct jz_eth_private *np = (struct jz_eth_private *)dev->priv;
int ret = 0;
if (np->thread != NULL) {
np->thread_die = 1;
wmb();
send_sig(SIGTERM, np->thread, 1);
if (ret) {
errprintk("%s: unable to signal thread\n", dev->name);
return 1;
}
wait_for_completion (&np->thr_exited);
}
return 0;
}
static int link_check_thread(void *data)
{
struct net_device *dev=(struct net_device *)data;
struct jz_eth_private *np = (struct jz_eth_private *)netdev->priv;
unsigned char current_link;
unsigned long timeout;
daemonize("%s", dev->name);
spin_lock_irq(&current->sighand->siglock);
sigemptyset(&current->blocked);
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
strncpy(current->comm, dev->name, sizeof(current->comm) - 1);
current->comm[sizeof(current->comm) - 1] = '\0';
while (1) {
timeout = 3*HZ;
do {
timeout = interruptible_sleep_on_timeout(&np->thr_wait, timeout);
/* make swsusp happy with our thread */
// if (current->flags & PF_FREEZE)
// refrigerator(PF_FREEZE);
} while (!signal_pending(current) && (timeout > 0));
if (signal_pending (current)) {
spin_lock_irq(&current->sighand->siglock);
flush_signals(current);
spin_unlock_irq(&current->sighand->siglock);
}
if (np->thread_die)
break;
current_link = mii_link_ok(&mii_info);
if (np->link_state != current_link) {
if (current_link) {
infoprintk("%s: Ethernet Link OK!\n", dev->name);
jz_eth_curr_mode(dev);
netif_carrier_on(dev);
} else {
errprintk("%s: Ethernet Link offline!\n", dev->name);
netif_carrier_off(dev);
}
}
np->link_state = current_link;
}
complete_and_exit(&np->thr_exited, 0);
}
static void skb_dump(struct sk_buff *skb)
{
printk("skb ----------- [ 0x%08x ]\n", (unsigned int)skb);
printk("head = 0x%08x, data = 0x%08x, tail = 0x%08x, end = 0x%08x\n",
(unsigned int)(skb->head), (unsigned int)(skb->data),
(unsigned int)(skb->tail), (unsigned int)(skb->end));
printk("truesize = %d (0x%08x), len = %d (0x%08x)\n",
skb->truesize, skb->truesize, skb->len, skb->len);
printk("headroom = %d (0x%08x), tailroom = %d (0x%08x)\n",
skb_headroom(skb), skb_headroom(skb), skb_tailroom(skb), skb_tailroom(skb));
printk("---------------------------\n");
}
#ifdef ETH_DEBUG
static void desc_dump(struct net_device *dev)
{
struct jz_eth_private *np = (struct jz_eth_private *)dev->priv;
int i;
printk("==================================================\n");
/*
for (i = 0; i < NUM_TX_DESCS; i++) {
printk("tx desc %2d :[0x%08x], addr = 0x%08x, pkt_size = 0x%08x, next = 0x%08x\n",
i, &(np->tx_ring[i]), np->tx_ring[i].pkt_addr, np->tx_ring[i].pkt_size, np->tx_ring[i].next_desc);
}
*/
for (i = 0; i < 4/*NUM_RX_DESCS*/; i++) {
printk("rx desc %2d :[0x%08x], addr = 0x%08x, pkt_size = 0x%08x, next = 0x%08x\n",
i, &(np->rx_ring[i]), np->rx_ring[i].pkt_addr, np->rx_ring[i].pkt_size, np->rx_ring[i].next_desc);
}
printk("==================================================\n");
}
static void dma_regs_dump(char *str)
{
printk("%s", str);
printk("==================================================\n");
printk("DMA_TCR = 0x%08x DMA_TDR = 0x%08x\n", REG32(ETH_DMA_TCR), REG32(ETH_DMA_TDR));
printk("DMA_TSR = 0x%08x DMA_RCR = 0x%08x\n", REG32(ETH_DMA_TSR), REG32(ETH_DMA_RCR));
printk("DMA_RDR = 0x%08x DMA_RSR = 0x%08x\n", REG32(ETH_DMA_RDR), REG32(ETH_DMA_RSR));
printk("DMA_IMR = 0x%08x DMA_IR = 0x%08x\n", REG32(ETH_DMA_IMR), REG32(ETH_DMA_IR));
printk("==================================================\n");
}
static void mac_regs_dump(void)
{
printk("==================================================\n");
printk("MAC_MCR1 = 0x%08x MAC_MCR2 = 0x%08x\n", REG32(ETH_MAC_MCR1), REG32(ETH_MAC_MCR2));
printk("MAC_IPGR = 0x%08x MAC_NIPGR= 0x%08x\n", REG32(ETH_MAC_IPGR), REG32(ETH_MAC_NIPGR));
printk("MAC_CWR = 0x%08x MAC_MFR = 0x%08x\n", REG32(ETH_MAC_CWR), REG32(ETH_MAC_MFR));
printk("MAC_PSR = 0x%08x MAC_TR = 0x%08x\n", REG32(ETH_MAC_PSR), REG32(ETH_MAC_TR));
printk("MAC_MCFGR= 0x%08x MAC_MCMDR= 0x%08x\n", REG32(ETH_MAC_MCFGR), REG32(ETH_MAC_MCMDR));
printk("MAC_MADRR= 0x%08x MAC_MINDR= 0x%08x\n", REG32(ETH_MAC_MADRR), REG32(ETH_MAC_MINDR));
printk("MAC_SA0 = 0x%08x MAC_SA1 = 0x%08x MAC_SA2 = 0x%08x\n",
REG32(ETH_MAC_SA0), REG32(ETH_MAC_SA1), REG32(ETH_MAC_SA2));
printk("==================================================\n");
}
static void fifo_regs_dump(void)
{
printk("==================================================\n");
printk("FIFO_CR0 = 0x%08x\n", REG32(ETH_FIFO_CR0));
printk("FIFO_CR1 = 0x%08x\n", REG32(ETH_FIFO_CR1));
printk("FIFO_CR2 = 0x%08x\n", REG32(ETH_FIFO_CR2));
printk("FIFO_CR3 = 0x%08x\n", REG32(ETH_FIFO_CR3));
printk("FIFO_CR4 = 0x%08x\n", REG32(ETH_FIFO_CR4));
printk("FIFO_CR5 = 0x%08x\n", REG32(ETH_FIFO_CR5));
#if 0
printk("RAR0 = 0x%08x RAR1 = 0x%08x\n", REG32(ETH_FIFO_RAR0), REG32(ETH_FIFO_RAR1));
printk("RAR2 = 0x%08x RAR3 = 0x%08x\n", REG32(ETH_FIFO_RAR2), REG32(ETH_FIFO_RAR3));
printk("RAR4 = 0x%08x RAR5 = 0x%08x\n", REG32(ETH_FIFO_RAR4), REG32(ETH_FIFO_RAR5));
printk("RAR6 = 0x%08x RAR7 = 0x%08x\n", REG32(ETH_FIFO_RAR6), REG32(ETH_FIFO_RAR7));
#endif
printk("==================================================\n");
}
static void stat_regs_dump(void)
{
printk("==================================================\n");
printk("ETH_STAT_TR64= 0x%08x, ETH_STAT_TR127= 0x%08x, ETH_STAT_TR255= 0x%08x, ETH_STAT_TR511= 0x%08x\n",
REG32(ETH_STAT_TR64), REG32(ETH_STAT_TR127), REG32(ETH_STAT_TR255), REG32(ETH_STAT_TR511));
printk("ETH_STAT_TR1K= 0x%08x, ETH_STAT_TRMAX= 0x%08x, ETH_STAT_TRMGV= 0x%08x\n",
REG32(ETH_STAT_TR1K), REG32(ETH_STAT_TRMAX), REG32(ETH_STAT_TRMGV));
printk("------\nETH_STAT_RBYT= 0x%08x, ETH_STAT_RPKT= 0x%08x, ETH_STAT_RFCS= 0x%08x, ETH_STAT_RMCA= 0x%08x\n",
REG32(ETH_STAT_RBYT), REG32(ETH_STAT_RPKT), REG32(ETH_STAT_RFCS), REG32(ETH_STAT_RMCA));
printk("ETH_STAT_RDRP= 0x%08x\n", REG32(ETH_STAT_RDRP));
printk("------\nETH_STAT_TBYT= 0x%08x, ETH_STAT_TPKT= 0x%08x, ETH_STAT_TFCS = 0x%08x, ETH_STAT_TNCL= 0x%08x\n",
REG32(ETH_STAT_TBYT), REG32(ETH_STAT_TPKT), REG32(ETH_STAT_TFCS), REG32(ETH_STAT_TNCL));
printk("ETH_STAT_TDRP= 0x%08x\n", REG32(ETH_STAT_TDRP));
printk("==================================================\n");
/*
printk("==================================================\n");
printk("ETH_STAT_TR64= 0x%08x, ETH_STAT_TR127= 0x%08x, ETH_STAT_TR255= 0x%08x, ETH_STAT_TR511= 0x%08x\n",
REG32(ETH_STAT_TR64), REG32(ETH_STAT_TR127), REG32(ETH_STAT_TR255), REG32(ETH_STAT_TR511));
printk("ETH_STAT_TR1K= 0x%08x, ETH_STAT_TRMAX= 0x%08x, ETH_STAT_TRMGV= 0x%08x\n",
REG32(ETH_STAT_TR1K), REG32(ETH_STAT_TRMAX), REG32(ETH_STAT_TRMGV));
printk("ETH_STAT_RBYT= 0x%08x, ETH_STAT_RPKT= 0x%08x, ETH_STAT_RFCS= 0x%08x, ETH_STAT_RMCA= 0x%08x\n",
REG32(ETH_STAT_RBYT), REG32(ETH_STAT_RPKT), REG32(ETH_STAT_RFCS), REG32(ETH_STAT_RMCA));
printk("ETH_STAT_RBCA= 0x%08x, ETH_STAT_RXCF= 0x%08x, ETH_STAT_RXPF= 0x%08x, ETH_STAT_RXUO= 0x%08x\n",
REG32(ETH_STAT_RBCA), REG32(ETH_STAT_RXCF), REG32(ETH_STAT_RXPF), REG32(ETH_STAT_RXUO));
printk("ETH_STAT_RALN= 0x%08x, ETH_STAT_RFLR= 0x%08x, ETH_STAT_RCDE= 0x%08x, ETH_STAT_RCSE= 0x%08x\n",
REG32(ETH_STAT_RALN), REG32(ETH_STAT_RFLR), REG32(ETH_STAT_RCDE), REG32(ETH_STAT_RCSE));
printk("ETH_STAT_RUND= 0x%08x, ETH_STAT_ROVR= 0x%08x, ETH_STAT_RFRG= 0x%08x, ETH_STAT_RJBR= 0x%08x\n",
REG32(ETH_STAT_RUND), REG32(ETH_STAT_ROVR), REG32(ETH_STAT_RFRG), REG32(ETH_STAT_RJBR));
printk("ETH_STAT_RDRP= 0x%08x\n", REG32(ETH_STAT_RDRP));
printk("ETH_STAT_TBYT= 0x%08x, ETH_STAT_TPKT= 0x%08x, ETH_STAT_TMCA= 0x%08x, ETH_STAT_TBCA= 0x%08x\n",
REG32(ETH_STAT_TBYT), REG32(ETH_STAT_TPKT), REG32(ETH_STAT_TMCA), REG32(ETH_STAT_TBCA));
printk("ETH_STAT_TXPF= 0x%08x, ETH_STAT_TDFR= 0x%08x, ETH_STAT_TEDF= 0x%08x, ETH_STAT_TSCL= 0x%08x\n",
REG32(ETH_STAT_TXPF), REG32(ETH_STAT_TDFR), REG32(ETH_STAT_TEDF), REG32(ETH_STAT_TSCL));
printk("ETH_STAT_TMCL= 0x%08x, ETH_STAT_TLCL= 0x%08x, ETH_STAT_TXCL= 0x%08x, ETH_STAT_TNCL= 0x%08x\n",
REG32(ETH_STAT_TMCL), REG32(ETH_STAT_TLCL), REG32(ETH_STAT_TXCL), REG32(ETH_STAT_TNCL));
printk("ETH_STAT_TPFH= 0x%08x, ETH_STAT_TDRP= 0x%08x, ETH_STAT_TJBR= 0x%08x, ETH_STAT_TFCS= 0x%08x\n",
REG32(ETH_STAT_TPFH), REG32(ETH_STAT_TDRP), REG32(ETH_STAT_TJBR), REG32(ETH_STAT_TFCS));
printk("ETH_STAT_TXCF= 0x%08x, ETH_STAT_TOVR= 0x%08x, ETH_STAT_TUND= 0x%08x, ETH_STAT_TFRG= 0x%08x\n",
REG32(ETH_STAT_TXCF), REG32(ETH_STAT_TOVR), REG32(ETH_STAT_TUND), REG32(ETH_STAT_TFRG));
printk("ETH_STAT_CAR1= 0x%08x, ETH_STAT_CAR2= 0x%08x, ETH_STAT_CARM1= 0x%08x, ETH_STAT_CARM2= 0x%08x\n",
REG32(ETH_STAT_CAR1), REG32(ETH_STAT_CAR2), REG32(ETH_STAT_CARM1), REG32(ETH_STAT_CARM2));
printk("==================================================\n");
*/
}
static void counters_dump(struct jz_eth_private *np)
{
int i = 0;
printk("\n");
do {
printk("cnts[%d] = %d\n", i, np->carry_counters[i]);
} while (++i < STAT_CNT_NUM);
}
static void sal_regs_dump(void)
{
printk("==================================================\n");
printk("ETH_SAL_AFR = 0x%08x, ETH_SAL_HT1 = 0x%08x, ETH_SAL_HT2 = 0x%08x\n",
REG32(ETH_SAL_AFR), REG32(ETH_SAL_HT1), REG32(ETH_SAL_HT2));
printk("==================================================\n");
}
/*
* Display ethernet packet header
* This routine is used for test function
*/
static void eth_dbg_rx(struct sk_buff *skb, int len)
{
int i, j;
printk("R: %02x:%02x:%02x:%02x:%02x:%02x <- %02x:%02x:%02x:%02x:%02x:%02x len/SAP:%02x%02x [%d]\n",
(u8)skb->data[0],
(u8)skb->data[1],
(u8)skb->data[2],
(u8)skb->data[3],
(u8)skb->data[4],
(u8)skb->data[5],
(u8)skb->data[6],
(u8)skb->data[7],
(u8)skb->data[8],
(u8)skb->data[9],
(u8)skb->data[10],
(u8)skb->data[11],
(u8)skb->data[12],
(u8)skb->data[13],
len);
for (j=0; len>0; j+=16, len-=16) {
printk(" %03x: ",j);
for (i=0; i<16 && i<len; i++) {
printk("%02x ",(u8)skb->data[i+j]);
}
printk("\n");
}
return;
}
static void eth_dbg_tx(struct sk_buff *skb, int len)
{
int i, j;
printk("T: %02x:%02x:%02x:%02x:%02x:%02x <- %02x:%02x:%02x:%02x:%02x:%02x len/SAP:%02x%02x [%d]\n",
(u8)skb->data[0], (u8)skb->data[1], (u8)skb->data[2], (u8)skb->data[3],
(u8)skb->data[4], (u8)skb->data[5], (u8)skb->data[6], (u8)skb->data[7],
(u8)skb->data[8], (u8)skb->data[9], (u8)skb->data[10], (u8)skb->data[11],
(u8)skb->data[12], (u8)skb->data[13], len);
for (j=0; len>0; j+=16, len-=16) {
printk(" %03x: ",j);
for (i=0; i<16 && i<len; i++) {
printk("%02x ",(u8)skb->data[i+j]);
}
printk("\n");
}
return;
}
#if 0
/*
* Show all mii registers - this routine is used for test
*/
static void mii_db_out(struct net_device *dev)
{
struct jz_eth_private *np = (struct jz_eth_private *)dev->priv;
unsigned int mii_test;
mii_test = mdio_read(dev,np->valid_phy,MII_BMCR);
DBPRINTK("BMCR ====> 0x%4.4x \n",mii_test);
mii_test = mdio_read(dev,np->valid_phy,MII_BMSR);
DBPRINTK("BMSR ====> 0x%4.4x \n",mii_test);
mii_test = mdio_read(dev,np->valid_phy,MII_ANAR);
DBPRINTK("ANAR ====> 0x%4.4x \n",mii_test);
mii_test = mdio_read(dev,np->valid_phy,MII_ANLPAR);
DBPRINTK("ANLPAR ====> 0x%4.4x \n",mii_test);
mii_test = mdio_read(dev,np->valid_phy,16);
DBPRINTK("REG16 ====> 0x%4.4x \n",mii_test);
mii_test = mdio_read(dev,np->valid_phy,17);
DBPRINTK("REG17 ====> 0x%4.4x \n",mii_test);
}
#endif
#endif // ETH_DEBUG
/*
* MII operation routines
*/
static inline void mii_wait(void)
{
int i;
for (i = 0; i < MAX_WAIT; i++, mdelay(1)) {
if (!__mac_mii_is_busy())
return ;
}
// printk("\nMAC_MCMDR= 0x%04x MAC_MADRR= 0x%04x MAC_MINDR = 0x%04x\n",
// REG16(ETH_MAC_MCMDR), REG16(ETH_MAC_MADRR), REG16(ETH_MAC_MINDR));
if (i == MAX_WAIT)
printk("MII wait timeout\n");
}
static int mdio_read(struct net_device *dev,int phy_id, int location)
{
int retval = 0;
__mac_send_mii_read_cmd(phy_id, location, MII_NO_SCAN);
mii_wait();
retval = __mac_mii_read_data();
return retval;
}
static void mdio_write(struct net_device *dev,int phy_id, int location, int data)
{
__mac_send_mii_write_cmd(phy_id, location, data);
mii_wait();
}
/*
* Search MII phy
*/
static int jz_search_mii_phy(struct net_device *dev)
{
struct jz_eth_private *np = (struct jz_eth_private *)dev->priv;
int phy, phy_idx = 0;
np->valid_phy = 0xff;
for (phy = 0; phy < 32; phy++) {
int mii_status = mdio_read(dev, phy, 1);
if (mii_status != 0xffff && mii_status != 0x0000) {
np->phys[phy_idx] = phy;
np->ecmds[phy_idx].speed=SPEED_100;
np->ecmds[phy_idx].duplex=DUPLEX_FULL;
np->ecmds[phy_idx].port=PORT_MII;
np->ecmds[phy_idx].transceiver=XCVR_INTERNAL;
np->ecmds[phy_idx].phy_address=np->phys[phy_idx];
np->ecmds[phy_idx].autoneg=AUTONEG_ENABLE;
np->ecmds[phy_idx].advertising=(ADVERTISED_10baseT_Half |
ADVERTISED_10baseT_Full |
ADVERTISED_100baseT_Half |
ADVERTISED_100baseT_Full);
phy_idx++;
}
}
if (phy_idx == 1) {
np->valid_phy = np->phys[0];
np->phy_type = 0;
}
if (phy_idx != 0) {
phy = np->valid_phy;
np->advertising = mdio_read(dev,phy, 4);
}
return phy_idx;
}
#if 1 // multicast
/*
* CRC calc for Destination Address for gets hashtable index
*/
#define POLYNOMIAL 0x04c11db7UL
static u16 jz_hashtable_index(u8 *addr)
{
#if 1
u32 crc = 0xffffffff, msb;
int i, j;
u32 byte;
for (i = 0; i < 6; i++) {
byte = *addr++;
for (j = 0; j < 8; j++) {
msb = crc >> 31;
crc <<= 1;
if (msb ^ (byte & 1)) crc ^= POLYNOMIAL;
byte >>= 1;
}
}
return ((int)(crc >> 26));
#endif
#if 0
int crc = -1;
int length=6;
int bit;
unsigned char current_octet;
while (--length >= 0) {
current_octet = *addr++;
for (bit = 0; bit < 8; bit++, current_octet >>= 1)
crc = (crc << 1) ^ ((crc < 0) ^ (current_octet & 1) ?
POLYNOMIAL : 0);
}
return ((int)(crc >> 26));
#endif
}
/*
* Multicast filter and config multicast hash table
*/
#define MULTICAST_FILTER_LIMIT 64
static void jz_set_multicast_list(struct net_device *dev)
{
int i, hash_index;
u32 hash_h, hash_l, hash_bit;
if (dev->flags & IFF_PROMISC) {
/* Accept any kinds of packets */
__sal_set_mode(AFR_PRO);
__sal_set_hash_table(0xffffffff, 0xffffffff);
printk("%s: enter promisc mode!\n",dev->name);
} else if ((dev->flags & IFF_ALLMULTI) || (dev->mc_count > MULTICAST_FILTER_LIMIT)) {
/* Accept all multicast packets */
__sal_set_mode(AFR_PRM);
__sal_set_hash_table(0xffffffff, 0xffffffff);
printk("%s: enter allmulticast mode! %d \n",dev->name,dev->mc_count);
} else if (dev->flags & IFF_MULTICAST) {
/* Update multicast hash table */
struct dev_mc_list *mclist;
__sal_get_hash_table(hash_h, hash_l);
for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
i++, mclist = mclist->next)
{
hash_index = jz_hashtable_index(mclist->dmi_addr);
hash_bit=0x00000001;
hash_bit <<= (hash_index & 0x1f);
if (hash_index > 0x1f)
hash_h |= hash_bit;
else
hash_l |= hash_bit;
DBPRINTK("----------------------------\n");
#ifdef ETH_DEBUG
int j;
for (j=0;j<mclist->dmi_addrlen;j++)
printk("%2.2x:",mclist->dmi_addr[j]);
printk("\n");
#endif
//printk("dmi.addrlen => %d\n",mclist->dmi_addrlen);
//printk("dmi.users => %d\n",mclist->dmi_users);
//printk("dmi.gusers => %d\n",mclist->dmi_users);
}
__sal_set_hash_table(hash_h, hash_l);
__sal_set_mode(AFR_AMC);
//printk("This is multicast hash table high bits [%4.4x]\n",readl(ETH_SAL_HT1));
//printk("This is multicast hash table low bits [%4.4x]\n",readl(ETH_SAL_HT2));
//printk("%s: enter multicast mode!\n",dev->name);
}
}
#endif // multicast
static inline int jz_phy_reset(struct net_device *dev)
{
struct jz_eth_private *np = (struct jz_eth_private *)dev->priv;
unsigned int mii_reg0;
unsigned int count;
mii_reg0 = mdio_read(dev,np->valid_phy, MII_BMCR);
mii_reg0 |= MII_CR_RST;
mdio_write(dev, np->valid_phy, MII_BMCR, mii_reg0); //reset phy
for (count = 0; count < 2000; count++) {
mdelay(1);
mii_reg0 = mdio_read(dev,np->valid_phy, MII_BMCR);
if (!(mii_reg0 & MII_CR_RST))
break; //reset completed
}
if (count == 2000)
return 1; //phy error
else
return 0;
}
/*
* Start Auto-Negotiation function for PHY
*/
/*
static int jz_autonet_complete(struct net_device *dev)
{
struct jz_eth_private *np = (struct jz_eth_private *)dev->priv;
int count;
u32 mii_reg1, timeout = 3000;
for (count = 0; count < timeout; count++) {
mdelay(1);
mii_reg1 = mdio_read(dev,np->valid_phy, MII_BMSR);
if (mii_reg1 & 0x0020)
break;
}
//mii_db_out(dev); //for debug to display all register of MII
if (count >= timeout)
return 1; //auto negotiation error
else
return 0;
}
*/
/*
* Get current mode of eth phy
*/
static u32 jz_eth_curr_mode(struct net_device *dev)
{
struct jz_eth_private *np = (struct jz_eth_private *)dev->priv;
unsigned int mii_reg17;
u32 flag = 0;
mii_reg17 = mdio_read(dev,np->valid_phy,MII_DSCSR);
np->media = mii_reg17>>12;
if (np->media==8) {
infoprintk("%s: Current Operation Mode is [100M Full Duplex]",dev->name);
flag = 0;
np->full_duplex=1;
}
if (np->media==4) {
infoprintk("%s: Current Operation Mode is [100M Half Duplex]",dev->name);
flag = 0;
np->full_duplex=0;
}
if (np->media==2) {
infoprintk("%s: Current Operation Mode is [10M Full Duplex]",dev->name);
np->full_duplex=1;
}
if (np->media==1) {
infoprintk("%s: Current Operation Mode is [10M Half Duplex]",dev->name);
np->full_duplex=0;
}
printk("\n");
return flag;
}
static void config_mac(struct net_device *dev)
{
struct jz_eth_private *np = (struct jz_eth_private *)dev->priv;
u32 mac_cfg_1 = 0, mac_cfg_2 = 0;
// Enable tx & rx flow control, enable receive
mac_cfg_1 = MCR1_TFC | MCR1_RFC | MCR1_RE;
#ifdef USE_RMII
// Enable RMII
mac_cfg_1 |= 1 << 13;
#endif
// Enable loopack mode
//mac_cfg_1 |= MCR1_LB;
/* bit 7 bit 6 bit 5
MCR2_ADPE MCR2_VPE MCR2_PCE
x x 0 No pad, check CRC
> 0 0 1 Pad to 60B, append CRC
x 1 1 Pad to 64B, append CRC
1 0 1 if un-tagged, Pad to 60B, append CRC
if VLAN tagged, Pad to 64B, append CRC
if set MCR2_PCE(bit 5)
MCR2_CE(bit 4) must be set.
We need to pad frame to 60B and append 4-byte CRC.
*/
mac_cfg_2 = MCR2_PCE | MCR2_CE;
// Pure preamble enforcement
//mac_cfg_2 |= MCR2_PPE;
// Frame length checking
mac_cfg_2 |= MCR2_FLC;
if (np->full_duplex) {
mac_cfg_2 |= MCR2_FD;
__mac_set_IPGR(0x15);
} else {
__mac_set_IPGR(0x12);
}
REG16(ETH_MAC_MCR1) = mac_cfg_1;
REG16(ETH_MAC_MCR2) = mac_cfg_2;
__mac_set_NIPGR1(0x0c);
__mac_set_NIPGR2(0x12);
//mac_regs_dump();
}
static void config_fifo(void)
{
int i;
__fifo_reset_all();
REG32(ETH_FIFO_CR0) |= 0x80000000;
/* 4k rx FiFo */
__fifo_set_fr_threshold(0x180);
__fifo_set_high_wm(0x200);
__fifo_set_low_wm(0x40);
/* 4k tx FiFo */
/*
__fifo_set_ft_threshold(0x0200);
__fifo_set_ft_high_wm(0x0300);
*/
/* for 2k FiFo both tx */
__fifo_set_ft_threshold(0x0180);
__fifo_set_ft_high_wm(0x01b0);
__fifo_set_XOFF_RTX(4);
__fifo_set_pause_control();
REG32(ETH_FIFO_CR4) &= 0x0000;
REG32(ETH_FIFO_CR5) |= 0xffff;
__fifo_set_drop_cond(RSV_CRCE);
__fifo_set_dropdc_cond(RSV_CRCE);
/*
__fifo_set_drop_cond(RSV_MP);
__fifo_set_dropdc_cond(RSV_MP);
__fifo_set_drop_cond(RSV_LCE);
__fifo_set_dropdc_cond(RSV_LCE);
*/
__fifo_enable_all_modules();
for (i = 0;
i < MAX_WAIT && !__fifo_all_enabled();
i++, udelay(100)) {
;
}
if (i == MAX_WAIT) {
printk("config_fifo: Wait time out !\n");
return;
}
//fifo_regs_dump();
}
static void config_sal(void)
{
/* SAL config */
__sal_set_mode(AFR_AMC | AFR_ABC);
__sal_set_hash_table(0, 0);
}
/*
static void config_stat(void)
{
__stat_disable();
__stat_clear_counters();
// clear carry registers
REG32(ETH_STAT_CAR1) = REG32(ETH_STAT_CAR1);
REG32(ETH_STAT_CAR2) = REG32(ETH_STAT_CAR2);
__stat_disable_carry_irq();
__stat_enable_carry_irq();
//printk("CARM1 = 0x%08x, CARM2 = 0x%08x\n", REG32(ETH_STAT_CARM1), REG32(ETH_STAT_CARM2));
__stat_enable();
printk("Enable eth stat module.\n");
}
*/
static int autonet_complete(struct net_device *dev)
{
int i;
struct jz_eth_private *np = (struct jz_eth_private *)dev->priv;
for (i = 0;
i < MAX_WAIT && !(mdio_read(dev, np->valid_phy, MII_BMSR) & 0x0020);
i++, udelay(10)) {
;
}
if (i == MAX_WAIT) {
printk("autonet_comlete: autonet time out!\n");
return -1;
}
return 0;
}
static void config_phy(struct net_device *dev)
{
struct jz_eth_private *np = (struct jz_eth_private *)dev->priv;
u32 mii_anlpar, phy_mode;
mii_anlpar = mdio_read(dev, np->valid_phy, MII_ANLPAR);
if (mii_anlpar != 0xffff) {
mii_anlpar = mdio_read(dev, np->valid_phy, MII_ANLPAR); // read twice to make data stable
if ((mii_anlpar & 0x0100) || (mii_anlpar & 0x01C0) == 0x0040) {
printk("config_phy: full_duplex !!!\n");
np->full_duplex = 1;
}
phy_mode = mii_anlpar >> 5;
#ifdef USE_RMII
if (phy_mode & MII_ANLPAR_100M)
REG32(ETH_MAC_PSR) |= PSR_OS;
#endif
printk("ETH: setting %s %s-duplex based on MII tranceiver #%d\n",
(phy_mode & MII_ANLPAR_100M) ? "100Mbps" : "10Mbps",
np->full_duplex ? "full" : "half", np->mii_phy_cnt);
} else {
printk("config_phy: mii_anlpar is 0xffff, may be error ???\n");
}
}
/*
* Ethernet device hardware init
* This routine initializes the ethernet device hardware and PHY
*/
static int jz_init_hw(struct net_device *dev)
{
struct jz_eth_private *np = (struct jz_eth_private *)dev->priv;
struct ethtool_cmd ecmd;
int i;
__gpio_as_eth();
__eth_disable_irq();
__mac_set_mii_clk(0x7);
__mac_reset();
#if 0
/* mii operation */
if (jz_phy_reset(dev)) {
errprintk("PHY device do not reset!\n");
return -EPERM; // return operation not permitted
}
#endif
__eth_set_mac_address(dev->dev_addr[0], dev->dev_addr[1],
dev->dev_addr[2], dev->dev_addr[3],
dev->dev_addr[4], dev->dev_addr[5]);
printk("%s: JZ On-Chip ethernet (MAC ", dev->name);
for (i = 0; i < 5; i++) {
printk("%2.2x:", dev->dev_addr[i]);
}
printk("%2.2x, IRQ %d)\n", dev->dev_addr[i], dev->irq);
np->mii_phy_cnt = jz_search_mii_phy(dev);
printk("%s: Found %d PHY on JZ MAC\n", dev->name, np->mii_phy_cnt);
// New code, could make it work on 100M mode ...
if (autonet_complete(dev))
printk("ETH Auto-Negotiation failed\n");
config_phy(dev);
// old configuration
mii_info.phy_id = np->valid_phy;
mii_info.dev = dev;
mii_info.mdio_read = &mdio_read;
mii_info.mdio_write = &mdio_write;
ecmd.speed = SPEED_100;
ecmd.duplex = DUPLEX_FULL;
ecmd.port = PORT_MII;
ecmd.transceiver = XCVR_INTERNAL;
ecmd.phy_address = np->valid_phy;
ecmd.autoneg = AUTONEG_ENABLE;
/*
mii_ethtool_sset(&mii_info, &ecmd);
if (jz_autonet_complete(dev))
errprintk("%s: Ethernet Module AutoNegotiation failed\n",dev->name);
mii_ethtool_gset(&mii_info, &ecmd);
infoprintk("%s: Provide Modes: ",dev->name);
for (i = 0; i < 5;i++)
if (ecmd.advertising & (1<<i))
printk("(%d)%s", i+1, media_types[i]);
printk("\n");
flag = jz_eth_curr_mode(dev);
*/
config_mac(dev);
config_fifo();
config_sal();
// config_stat();
/* Set base address of TX and RX descriptors */
__eth_set_rx_desc_addr(np->dma_rx_ring);
__eth_set_tx_desc_addr(np->dma_tx_ring);
/* Burst length: 4, 8 or 16 */
//__eth_dma_set_burst_len(BURST_LEN_4);
//dma_regs_dump("set burst length\n");
/* Clear status registers */
__eth_clear_rx_flags();
__eth_clear_rx_pkt_cnt();
__eth_clear_tx_flags();
__eth_clear_tx_pkt_cnt();
__eth_enable_irq();
__eth_dma_rx_enable();
printk("eth hw init completed.\n");
return 0;
}
static void jz_eth_read_stats(struct jz_eth_private *np, int carry1, int carry2)
{
return ;
if (carry1 != 0) {
if (carry1 & CAR1_RPK) np->carry_counters[CNT_RPKT]++;
if (carry1 & CAR1_RBY) np->carry_counters[CNT_RBYT]++;
if (carry1 & CAR1_RFC) np->carry_counters[CNT_RFCS]++;
if (carry1 & CAR1_RDR) np->carry_counters[CNT_RDRP]++;
if (carry1 & CAR1_RMC) np->carry_counters[CNT_RMCA]++;
printk("carry1 = 0x%08x\n", carry1);
}
if (carry2 != 0) {
if (carry2 & CAR2_TPK) np->carry_counters[CNT_TPKT]++;
if (carry2 & CAR2_TBY) np->carry_counters[CNT_TBYT]++;
if (carry2 & CAR2_TFC) np->carry_counters[CNT_TFCS]++;
if (carry2 & CAR2_TDP) np->carry_counters[CNT_TDRP]++;
if (carry2 & CAR2_TNC) np->carry_counters[CNT_TNCL]++;
printk("carry2 = 0x%08x\n", carry2);
}
np->stats.rx_packets = REG32(ETH_STAT_RPKT) + (np->carry_counters[CNT_RPKT] << 18);
np->stats.tx_packets = REG32(ETH_STAT_TPKT) + (np->carry_counters[CNT_TPKT] << 18);
np->stats.rx_bytes = REG32(ETH_STAT_RBYT) + (np->carry_counters[CNT_RBYT] << 24);
np->stats.tx_bytes = REG32(ETH_STAT_TBYT) + (np->carry_counters[CNT_TBYT] << 24);
np->stats.rx_errors = REG32(ETH_STAT_RFCS) + (np->carry_counters[CNT_RFCS] << 12);
np->stats.tx_errors = REG32(ETH_STAT_TFCS) + (np->carry_counters[CNT_TFCS] << 12);
np->stats.rx_dropped = REG32(ETH_STAT_RDRP) + (np->carry_counters[CNT_RDRP] << 12);
np->stats.tx_dropped = REG32(ETH_STAT_TDRP) + (np->carry_counters[CNT_TDRP] << 12);
np->stats.multicast = REG32(ETH_STAT_RMCA) + (np->carry_counters[CNT_RMCA] << 18);
np->stats.collisions = REG32(ETH_STAT_TNCL) + (np->carry_counters[CNT_TNCL] << 13);
//counters_dump(np);
}
static int jz_eth_open(struct net_device *dev)
{
struct jz_eth_private *np = (struct jz_eth_private *)dev->priv;
int retval, i;
errprintk("jz_eth_open\n");
retval = request_irq(dev->irq, jz_eth_interrupt, 0, dev->name, dev);
if (retval) {
errprintk("%s: unable to get IRQ %d .\n", dev->name, dev->irq);
return -EAGAIN;
}
for (i = 0; i < NUM_RX_DESCS; i++) {
//printk("Rx_ring[%d] address: 0x%08x\n", i, &(np->rx_ring[i]));
np->rx_ring[i].pkt_addr = cpu_to_le32(np->dma_rx_buf + i*RX_BUF_SIZE);
np->rx_ring[i].pkt_size = cpu_to_le32(EMPTY_FLAG_MASK);
np->rx_ring[i].next_desc= cpu_to_le32(np->dma_rx_ring + (i+1) * sizeof (jz_desc_t));
}
np->rx_ring[NUM_RX_DESCS - 1].next_desc = cpu_to_le32(np->dma_rx_ring);
for (i = 0; i < NUM_TX_DESCS; i++) {
//printk("Tx_ring[%d] address: 0x%08x\n", i, &(np->tx_ring[i]));
np->tx_ring[i].pkt_addr = cpu_to_le32(0);
np->tx_ring[i].pkt_size = cpu_to_le32(EMPTY_FLAG_MASK);
np->tx_ring[i].next_desc= cpu_to_le32(np->dma_tx_ring + (i+1) * sizeof (jz_desc_t));
}
np->tx_ring[NUM_TX_DESCS - 1].next_desc = cpu_to_le32(np->dma_tx_ring);
np->rx_head = 0;
np->tx_head = np->tx_tail = 0;
//desc_dump(dev);
for (i = 0; i < STAT_CNT_NUM; i++)
np->carry_counters[i] = 0;
jz_init_hw(dev);
dev->trans_start = jiffies;
netif_start_queue(dev);
start_check(dev);
return 0;
}
static int jz_eth_close(struct net_device *dev)
{
netif_stop_queue(dev);
close_check(dev);
__eth_disable();
free_irq(dev->irq, dev);
return 0;
}
/*
* Get the current statistics.
* This may be called with the device open or closed.
*/
static struct net_device_stats * jz_eth_get_stats(struct net_device *dev)
{
struct jz_eth_private *np = (struct jz_eth_private *)dev->priv;
// unsigned int flags;
// spin_lock_irqsave(&np->lock, flags);
jz_eth_read_stats(np, 0, 0);
// spin_unlock_irqrestore(&np->lock, flags);
return &np->stats;
}
/*
* ethtool routines
*/
static int jz_ethtool_ioctl(struct net_device *dev, void *useraddr)
{
struct jz_eth_private *np = dev->priv;
u32 ethcmd;
/* dev_ioctl() in ../../net/core/dev.c has already checked
capable(CAP_NET_ADMIN), so don't bother with that here. */
if (get_user(ethcmd, (u32 *)useraddr))
return -EFAULT;
switch (ethcmd) {
case ETHTOOL_GDRVINFO: {
struct ethtool_drvinfo info = { ETHTOOL_GDRVINFO };
strcpy (info.driver, DRV_NAME);
strcpy (info.version, DRV_VERSION);
strcpy (info.bus_info, "OCS");
if (copy_to_user (useraddr, &info, sizeof (info)))
return -EFAULT;
return 0;
}
/* get settings */
case ETHTOOL_GSET: {
struct ethtool_cmd ecmd = { ETHTOOL_GSET };
spin_lock_irq(&np->lock);
mii_ethtool_gset(&mii_info, &ecmd);
spin_unlock_irq(&np->lock);
if (copy_to_user(useraddr, &ecmd, sizeof(ecmd)))
return -EFAULT;
return 0;
}
/* set settings */
case ETHTOOL_SSET: {
int r;
struct ethtool_cmd ecmd;
if (copy_from_user(&ecmd, useraddr, sizeof(ecmd)))
return -EFAULT;
spin_lock_irq(&np->lock);
r = mii_ethtool_sset(&mii_info, &ecmd);
spin_unlock_irq(&np->lock);
return r;
}
/* restart autonegotiation */
case ETHTOOL_NWAY_RST: {
return mii_nway_restart(&mii_info);
}
/* get link status */
case ETHTOOL_GLINK: {
struct ethtool_value edata = {ETHTOOL_GLINK};
edata.data = mii_link_ok(&mii_info);
if (copy_to_user(useraddr, &edata, sizeof(edata)))
return -EFAULT;
return 0;
}
/* get message-level */
case ETHTOOL_GMSGLVL: {
struct ethtool_value edata = {ETHTOOL_GMSGLVL};
edata.data = debug;
if (copy_to_user(useraddr, &edata, sizeof(edata)))
return -EFAULT;
return 0;
}
/* set message-level */
case ETHTOOL_SMSGLVL: {
struct ethtool_value edata;
if (copy_from_user(&edata, useraddr, sizeof(edata)))
return -EFAULT;
debug = edata.data;
return 0;
}
default:
break;
}
return -EOPNOTSUPP;
}
/*
* Config device
*/
static int jz_eth_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
struct jz_eth_private *np =(struct jz_eth_private *)dev->priv;
struct mii_ioctl_data *data, rdata;
switch (cmd) {
case SIOCETHTOOL:
return jz_ethtool_ioctl(dev, (void *) rq->ifr_data);
case SIOCGMIIPHY:
case SIOCDEVPRIVATE:
data = (struct mii_ioctl_data *)&rq->ifr_data;
data->phy_id = np->valid_phy;
case SIOCGMIIREG:
case SIOCDEVPRIVATE+1:
data = (struct mii_ioctl_data *)&rq->ifr_data;
data->val_out = mdio_read(dev,np->valid_phy, data->reg_num & 0x1f);
return 0;
case SIOCSMIIREG:
case SIOCDEVPRIVATE+2:
data = (struct mii_ioctl_data *)&rq->ifr_data;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
mdio_write(dev,np->valid_phy, data->reg_num & 0x1f, data->val_in);
return 0;
case READ_COMMAND:
data = (struct mii_ioctl_data *)rq->ifr_data;
if (copy_from_user(&rdata,data,sizeof(rdata)))
return -EFAULT;
rdata.val_out = mdio_read(dev,rdata.phy_id, rdata.reg_num & 0x1f);
if (copy_to_user(data,&rdata,sizeof(rdata)))
return -EFAULT;
return 0;
case WRITE_COMMAND:
if (np->phy_type==1) {
data = (struct mii_ioctl_data *)rq->ifr_data;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
if (copy_from_user(&rdata,data,sizeof(rdata)))
return -EFAULT;
mdio_write(dev,rdata.phy_id, rdata.reg_num & 0x1f, rdata.val_in);
}
return 0;
case GETDRIVERINFO:
if (np->phy_type==1) {
data = (struct mii_ioctl_data *)rq->ifr_data;
if (copy_from_user(&rdata,data,sizeof(rdata)))
return -EFAULT;
rdata.val_in = 0x1;
rdata.val_out = 0x00d0;
if (copy_to_user(data,&rdata,sizeof(rdata)))
return -EFAULT;
}
return 0;
default:
return -EOPNOTSUPP;
}
return 0;
}
/*
* Received one packet
*/
static void eth_rxready(struct net_device *dev)
{
struct jz_eth_private *np = (struct jz_eth_private*)dev->priv;
jz_desc_t *rx_head_desc = &(np->rx_ring[np->rx_head]);
struct sk_buff *skb;
unsigned char *pkt_ptr;
u32 pkt_len;
int i = 0;
/*
printk("<<< eth_rxready\n");
printk("rx_head_desc: 0x08%x, rx_head = %d\n", rx_head_desc, np->rx_head);
printk("rx_ring[.] = 0x%x, virt_to_bus(rx_ring[.]) = 0x%x, virt_to_phys(rx_ring[.]) = 0x%x\n",
np->rx_ring[np->rx_head], virt_to_bus(&np->rx_ring[np->rx_head]), virt_to_phys(&np->rx_ring[np->rx_head]));
desc_dump(dev);
dma_regs_dump("before eth_rxready\n");
*/
/* empty_flag == 0 */
while (!__desc_get_empty_flag(le32_to_cpu(rx_head_desc->pkt_size))) {
i++;
/*
printk("<---- %x %x %x %x %x %x\n",
*((unsigned char *)bus_to_virt(rx_head_desc->pkt_addr) + 0),
*((unsigned char *)bus_to_virt(rx_head_desc->pkt_addr) + 1),
*((unsigned char *)bus_to_virt(rx_head_desc->pkt_addr) + 2),
*((unsigned char *)bus_to_virt(rx_head_desc->pkt_addr) + 3),
*((unsigned char *)bus_to_virt(rx_head_desc->pkt_addr) + 4),
*((unsigned char *)bus_to_virt(rx_head_desc->pkt_addr) + 5));
*/
pkt_ptr = bus_to_virt(le32_to_cpu(rx_head_desc->pkt_addr));
pkt_len = (__desc_get_pkt_size(le32_to_cpu(rx_head_desc->pkt_size))) - 4;
skb = dev_alloc_skb(pkt_len + 2);
if (skb == NULL) {
printk("%s: Memory squeeze, dropping. dev_alloc_skb(0x%08x)\n",
dev->name, pkt_len + 2);
np->stats.rx_dropped++;
__eth_reduce_pkt_recv_cnt();
//break;
return ;
}
skb->dev = dev;
skb_reserve(skb, 2); /* 16 byte align */
memcpy(skb->data, pkt_ptr, pkt_len);
skb_put(skb, pkt_len);
/*
printk("R : ");
for (i = 0; i < 16; i++)
printk("%02x ", *((unsigned char*)skb->data + i));
printk("\n");
*/
skb->protocol = eth_type_trans(skb,dev);
netif_rx(skb); /* pass the packet to upper layers */
dev->last_rx = jiffies;
__eth_reduce_pkt_recv_cnt();
//dma_regs_dump("after reduce recv cnt\n");
np->rx_ring[np->rx_head].pkt_size = EMPTY_FLAG_MASK;
np->rx_head ++;
if (np->rx_head >= NUM_RX_DESCS)
np->rx_head = 0;
}
if (i == 0) {
printk("BUG: eth_rxready\n");
BUG_ON(1);
}
}
/*
* Tx timeout routine
*/
static void jz_eth_tx_timeout(struct net_device *dev)
{
//struct jz_eth_private *np = (struct jz_eth_private *)dev->priv;
jz_init_hw(dev);
netif_wake_queue(dev);
}
/*
* One packet was transmitted
*/
static void eth_txdone(struct net_device *dev, int counter)
{
struct jz_eth_private *np = (struct jz_eth_private*)dev->priv;
int tx_tail = np->tx_tail;
/*
if (tx_tail > np->tx_head) {
printk("BUG 006, tx_tail = 0x%08x, tx_head = 0x%08x\n", tx_tail, np->tx_head);
BUG_ON();
}
*/
// while (tx_tail != np->tx_head && count-- > 0) {
if (counter <= 0) {
printk("BUG: eth_txdone, counter = %d\n", counter);
BUG_ON(1);
}
while (counter-- > 0) {
int entry = tx_tail % NUM_TX_DESCS;
// s32 pkt_size = le32_to_cpu(np->tx_ring[entry].pkt_size);
// np->stats.tx_packets++;
/* Free the original skb */
if (np->tx_skb[entry]) {
dev_kfree_skb_irq(np->tx_skb[entry]);
np->tx_skb[entry] = 0;
}
tx_tail++;
__eth_reduce_pkt_sent_cnt();
}
/*
if (count > 0) {
printk("BUG 004, t = 0x%08x, count = 0x%08x\n", t, count);
printk("tx_tail = 0x%08x, tx_head = 0x%08x\n", np->tx_tail, np->tx_head);
BUG_ON(1);
}
*/
/*
if (tx_tail != np->tx_head) {
printk("BUG 005\n");
BUG_ON(1);
}
*/
if (np->tx_full && (tx_tail + NUM_TX_DESCS > np->tx_head + 1)) {
/* The ring is no longer full */
np->tx_full = 0;
netif_start_queue(dev);
}
np->tx_tail = tx_tail;
}
/*
* Update the tx descriptor
*/
static void load_tx_packet(struct net_device *dev, char *buf, u32 length, struct sk_buff *skb)
{
struct jz_eth_private *np = (struct jz_eth_private *)dev->priv;
int entry = np->tx_head % NUM_TX_DESCS;
int i;
np->tx_ring[entry].pkt_addr = cpu_to_le32(virt_to_bus(buf));
np->tx_ring[entry].pkt_size = cpu_to_le32(length & ~EMPTY_FLAG_MASK);
np->tx_skb[entry] = skb;
//printk("desc.pktaddr = 0x%08x, buf = 0x%08x\n", np->tx_ring[entry].pkt_addr, buf);
/* Notice us when will send a packet which begin with address: xxx1(binary) */
if (unlikely(np->tx_ring[entry].pkt_addr & 0x1)) {
skb_dump(skb);
printk("desc.pktaddr = 0x%08x\n", np->tx_ring[entry].pkt_addr);
for (i = -2; i < 16; i++) {
printk("%02x ", *((unsigned char *)le32_to_cpu(bus_to_virt(np->tx_ring[entry].pkt_addr)) + i));
}
printk("\n");
for (i = -2; i < 16; i++) {
printk("%02x ", *((unsigned char *)le32_to_cpu(buf) + i));
}
printk("\n");
for (i = -2; i < 16; i++) {
printk("%02x ", *((unsigned char *)(bus_to_virt(np->tx_ring[entry].pkt_addr)) + i));
}
printk("\n");
}
}
/*
* Transmit one packet
*/
static int jz_eth_send_packet(struct sk_buff *skb, struct net_device *dev)
{
struct jz_eth_private *np = (struct jz_eth_private *)dev->priv;
u32 length;
if (np->tx_full) {
return 0;
}
length = (skb->len < ETH_ZLEN) ? ETH_ZLEN : skb->len;
dma_cache_wback((unsigned long)skb->data, length);
load_tx_packet(dev, (char *)skb->data, length, skb);
spin_lock_irq(&np->lock);
np->tx_head ++;
//dma_regs_dump("before tx enable\n");
//fifo_regs_dump();
//mac_regs_dump();
__eth_dma_tx_enable(); /* Start the TX */
//dma_regs_dump("after tx enable\n");
//fifo_regs_dump();
//mac_regs_dump();
dev->trans_start = jiffies; /* for timeout */
if (np->tx_tail + NUM_TX_DESCS > np->tx_head + 1) {
np->tx_full = 0;
} else {
np->tx_full = 1;
netif_stop_queue(dev);
}
spin_unlock_irq(&np->lock);
return 0;
}
/*
* Interrupt service routine
*/
static irqreturn_t jz_eth_interrupt(int irq, void *dev_id)
{
struct net_device *dev = (struct net_device *)dev_id;
struct jz_eth_private *np = dev->priv;
unsigned int tx_sts;
unsigned int rx_sts;
unsigned int counter;
unsigned int carry1 = 0;
unsigned int carry2 = 0;
spin_lock(&np->lock);
__eth_disable_irq();
/* Read tx & rx state reg, which indicate action */
tx_sts = REG32(ETH_DMA_TSR);
rx_sts = REG32(ETH_DMA_RSR);
__eth_clear_tx_flags(); /* Clear UNDERRUN and BUSERROR */
__eth_clear_rx_flags(); /* Clear OVERFLOW and BUSERROR */
/* Tx UNDERRUN: one or more frames have already been sent. Current tx round has completed. */
if (tx_sts & TSR_UNDERRUN) {
/* To clear counter and PKTSENT bit, __eth_reduce_pkt_sent_cnt() was called inside */
counter = (tx_sts & TSR_PKTCNT_MASK) >> 16;
if (counter != 0)
eth_txdone(dev, counter);
}
/* Rx PKTRECV: one frame has already been received. Receive frame until there is no PKTRECV */
if (rx_sts & RSR_PKTRECV) {
/* To reduce counter and PKTRECV bit, __eth_reduce_pkt_recv_cnt() must called after each round */
eth_rxready(dev);
}
if ( !(tx_sts & TSR_FLAGS) && !(rx_sts & RSR_FLAGS) ) {
//printk("before read carry regs\n");
carry1 = REG32(ETH_STAT_CAR1);
carry2 = REG32(ETH_STAT_CAR2);
REG32(ETH_STAT_CAR1) = carry1;
REG32(ETH_STAT_CAR2) = carry2;
//printk("IRQ: carry1 = 0x%08x, carry2 = 0x%08x\n", carry1, carry2);
/*
if (carry1 || carry2) {
jz_eth_read_stats(np, carry1, carry2);
} else {
printk("tx_sts = 0x%08x, rx_sts = 0x%08x\n", tx_sts, rx_sts);
printk("BUG: interrupt, no irq source\n");
BUG_ON(1);
}
*/
//dma_regs_dump("before leave carry irq handler.\n");
goto _exit_irq;
}
/* Fatal bus error */
if (tx_sts & TSR_BUSERR || rx_sts & RSR_BUSERR) {
__eth_disable();
printk("%s: Fatal bus error occurred, sts=[%#8x %#8x], device stopped.\n", dev->name, tx_sts, rx_sts);
goto _exit_irq;
}
/* Rx overflow */
if (rx_sts & RSR_OVERFLOW) {
printk("RX_OVERFLOW\n");
__eth_dma_rx_enable();
}
_exit_irq:
__eth_enable_irq();
spin_unlock(&np->lock);
return IRQ_HANDLED;
}
#if 0 //def CONFIG_PM
/*
* Suspend the ETH interface.
*/
static int jz_eth_suspend(struct net_device *dev, int state)
{
struct jz_eth_private *jep = (struct jz_eth_private *)dev->priv;
unsigned long flags, tmp;
printk("ETH suspend.\n");
if (!netif_running(dev)) {
return 0;
}
netif_device_detach(dev);
spin_lock_irqsave(&jep->lock, flags);
/* Disable interrupts, stop Tx and Rx. */
__eth_disable_irq();
__eth_disable();
__stat_disable_carry_irq();
spin_unlock_irqrestore(&jep->lock, flags);
return 0;
}
/*
* Resume the ETH interface.
*/
static int jz_eth_resume(struct net_device *dev)
{
struct jz_eth_private *np = (struct jz_eth_private *)dev->priv;
printk("ETH resume.\n");
if (!netif_running(dev))
return 0;
jz_init_hw(dev);
netif_device_attach(dev);
jz_eth_tx_timeout(dev);
netif_wake_queue(dev);
return 0;
}
static int jz_eth_pm_callback(struct pm_dev *dev, pm_request_t rqst, void *data)
{
int ret;
if (!dev->data)
return -EINVAL;
switch (rqst) {
case PM_SUSPEND:
ret = jz_eth_suspend((struct net_device *)dev->data,
(int)data);
break;
case PM_RESUME:
ret = jz_eth_resume((struct net_device *)dev->data);
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
#endif /* CONFIG_PM */
static int __init jz_eth_init(void)
{
struct net_device *dev;
struct jz_eth_private *np;
int err;
dev = alloc_etherdev(sizeof(struct jz_eth_private));
if (!dev) {
printk(KERN_ERR "%s: alloc_etherdev failed\n", DRV_NAME);
return -ENOMEM;
}
netdev = dev;
np = (struct jz_eth_private *)P2ADDR(dev->priv);
dev->priv = np;
memset(np, 0, sizeof(struct jz_eth_private));
np->vaddr_rx_buf = (u32)dma_alloc_noncoherent(NULL, NUM_RX_DESCS*RX_BUF_SIZE,
&np->dma_rx_buf, 0);
if (!np->vaddr_rx_buf) {
printk(KERN_ERR "%s: Cannot alloc dma buffers\n", DRV_NAME);
unregister_netdev(dev);
free_netdev(dev);
return -ENOMEM;
}
np->dma_rx_ring = virt_to_bus(np->rx_ring);
np->dma_tx_ring = virt_to_bus(np->tx_ring);
np->full_duplex = 1;
np->link_state = 1;
spin_lock_init(&np->lock);
ether_setup(dev); // ?? the function has already been called in alloc_etherdev
dev->irq = IRQ_ETH;
dev->open = jz_eth_open;
dev->stop = jz_eth_close;
dev->hard_start_xmit = jz_eth_send_packet;
dev->get_stats = jz_eth_get_stats;
dev->set_multicast_list = jz_set_multicast_list;
dev->do_ioctl = jz_eth_ioctl;
dev->tx_timeout = jz_eth_tx_timeout;
dev->watchdog_timeo = ETH_TX_TIMEOUT;
// configure MAC address
get_mac_address(dev);
if ((err = register_netdev(dev)) != 0) {
printk("%s: Cannot register net device, error %d\n",
DRV_NAME, err);
free_netdev(dev);
return -ENOMEM;
}
printk("jz_eth_init finish!\n");
//#ifdef 0 //CONFIG_PM
// np->pmdev = pm_register(PM_SYS_DEV, PM_SYS_UNKNOWN, jz_eth_pm_callback);
// if (np->pmdev)
// np->pmdev->data = dev;
//#endif
return 0;
}
static void __exit jz_eth_exit(void)
{
struct net_device *dev = netdev;
struct jz_eth_private *np = dev->priv;
unregister_netdev(dev);
dma_free_noncoherent(NULL, NUM_RX_DESCS * RX_BUF_SIZE,
(void *)np->vaddr_rx_buf, np->dma_rx_buf);
free_netdev(dev);
}
module_init(jz_eth_init);
module_exit(jz_eth_exit);
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