*/
/* rtl8139.c - etherboot driver for the Realtek 8139 chipset
-
- ported from the linux driver written by Donald Becker
- by Rainer Bawidamann (Rainer.Bawidamann@informatik.uni-ulm.de) 1999
-
- This software may be used and distributed according to the terms
- of the GNU Public License, incorporated herein by reference.
-
- changes to the original driver:
- - removed support for interrupts, switching to polling mode (yuck!)
- - removed support for the 8129 chip (external MII)
-
-*/
+ *
+ * ported from the linux driver written by Donald Becker
+ * by Rainer Bawidamann (Rainer.Bawidamann@informatik.uni-ulm.de) 1999
+ *
+ * This software may be used and distributed according to the terms
+ * of the GNU Public License, incorporated herein by reference.
+ *
+ * changes to the original driver:
+ * - removed support for interrupts, switching to polling mode (yuck!)
+ * - removed support for the 8129 chip (external MII)
+ */
/*********************************************************************/
/* Revision History */
/*********************************************************************/
/*
- 28 Dec 2002 ken_yap@users.sourceforge.net (Ken Yap)
- Put in virt_to_bus calls to allow Etherboot relocation.
-
- 06 Apr 2001 ken_yap@users.sourceforge.net (Ken Yap)
- Following email from Hyun-Joon Cha, added a disable routine, otherwise
- NIC remains live and can crash the kernel later.
-
- 4 Feb 2000 espenlaub@informatik.uni-ulm.de (Klaus Espenlaub)
- Shuffled things around, removed the leftovers from the 8129 support
- that was in the Linux driver and added a bit more 8139 definitions.
- Moved the 8K receive buffer to a fixed, available address outside the
- 0x98000-0x9ffff range. This is a bit of a hack, but currently the only
- way to make room for the Etherboot features that need substantial amounts
- of code like the ANSI console support. Currently the buffer is just below
- 0x10000, so this even conforms to the tagged boot image specification,
- which reserves the ranges 0x00000-0x10000 and 0x98000-0xA0000. My
- interpretation of this "reserved" is that Etherboot may do whatever it
- likes, as long as its environment is kept intact (like the BIOS
- variables). Hopefully fixed rtl8139_recv() once and for all. The symptoms
- were that if Etherboot was left at the boot menu for several minutes, the
- first eth_poll failed. Seems like I am the only person who does this.
- First of all I fixed the debugging code and then set out for a long bug
- hunting session. It took me about a week full time work - poking around
- various places in the driver, reading Don Becker's and Jeff Garzik's Linux
- driver and even the FreeBSD driver (what a piece of crap!) - and
- eventually spotted the nasty thing: the transmit routine was acknowledging
- each and every interrupt pending, including the RxOverrun and RxFIFIOver
- interrupts. This confused the RTL8139 thoroughly. It destroyed the
- Rx ring contents by dumping the 2K FIFO contents right where we wanted to
- get the next packet. Oh well, what fun.
-
- 18 Jan 2000 mdc@thinguin.org (Marty Connor)
- Drastically simplified error handling. Basically, if any error
- in transmission or reception occurs, the card is reset.
- Also, pointed all transmit descriptors to the same buffer to
- save buffer space. This should decrease driver size and avoid
- corruption because of exceeding 32K during runtime.
-
- 28 Jul 1999 (Matthias Meixner - meixner@rbg.informatik.tu-darmstadt.de)
- rtl8139_recv was quite broken: it used the RxOK interrupt flag instead
- of the RxBufferEmpty flag which often resulted in very bad
- transmission performace - below 1kBytes/s.
-
-*/
+ * 28 Dec 2002 ken_yap@users.sourceforge.net (Ken Yap)
+ * Put in virt_to_bus calls to allow Etherboot relocation.
+ *
+ * 06 Apr 2001 ken_yap@users.sourceforge.net (Ken Yap)
+ * Following email from Hyun-Joon Cha, added a disable routine, otherwise
+ * NIC remains live and can crash the kernel later.
+ *
+ * 4 Feb 2000 espenlaub@informatik.uni-ulm.de (Klaus Espenlaub)
+ * Shuffled things around, removed the leftovers from the 8129 support
+ * that was in the Linux driver and added a bit more 8139 definitions.
+ * Moved the 8K receive buffer to a fixed, available address outside the
+ * 0x98000-0x9ffff range. This is a bit of a hack, but currently the only
+ * way to make room for the Etherboot features that need substantial amounts
+ * of code like the ANSI console support. Currently the buffer is just below
+ * 0x10000, so this even conforms to the tagged boot image specification,
+ * which reserves the ranges 0x00000-0x10000 and 0x98000-0xA0000. My
+ * interpretation of this "reserved" is that Etherboot may do whatever it
+ * likes, as long as its environment is kept intact (like the BIOS
+ * variables). Hopefully fixed rtl8139_recv() once and for all. The symptoms
+ * were that if Etherboot was left at the boot menu for several minutes, the
+ * first eth_poll failed. Seems like I am the only person who does this.
+ * First of all I fixed the debugging code and then set out for a long bug
+ * hunting session. It took me about a week full time work - poking around
+ * various places in the driver, reading Don Becker's and Jeff Garzik's Linux
+ * driver and even the FreeBSD driver (what a piece of crap!) - and
+ * eventually spotted the nasty thing: the transmit routine was acknowledging
+ * each and every interrupt pending, including the RxOverrun and RxFIFIOver
+ * interrupts. This confused the RTL8139 thoroughly. It destroyed the
+ * Rx ring contents by dumping the 2K FIFO contents right where we wanted to
+ * get the next packet. Oh well, what fun.
+ *
+ * 18 Jan 2000 mdc@thinguin.org (Marty Connor)
+ * Drastically simplified error handling. Basically, if any error
+ * in transmission or reception occurs, the card is reset.
+ * Also, pointed all transmit descriptors to the same buffer to
+ * save buffer space. This should decrease driver size and avoid
+ * corruption because of exceeding 32K during runtime.
+ *
+ * 28 Jul 1999 (Matthias Meixner - meixner@rbg.informatik.tu-darmstadt.de)
+ * rtl8139_recv was quite broken: it used the RxOK interrupt flag instead
+ * of the RxBufferEmpty flag which often resulted in very bad
+ * transmission performace - below 1kBytes/s.
+ *
+ */
#include <common.h>
#include <cpu_func.h>
#define RTL_TIMEOUT 100000
-/* PCI Tuning Parameters
- Threshold is bytes transferred to chip before transmission starts. */
+/* PCI Tuning Parameters */
+/* Threshold is bytes transferred to chip before transmission starts. */
#define TX_FIFO_THRESH 256 /* In bytes, rounded down to 32 byte units. */
#define RX_FIFO_THRESH 4 /* Rx buffer level before first PCI xfer. */
#define RX_DMA_BURST 4 /* Maximum PCI burst, '4' is 256 bytes */
#define RTL_STS_RXSTATUSOK BIT(0)
static int ioaddr;
-static unsigned int cur_rx,cur_tx;
+static unsigned int cur_rx, cur_tx;
/* The RTL8139 can only transmit from a contiguous, aligned memory block. */
-static unsigned char tx_buffer[TX_BUF_SIZE] __attribute__((aligned(4)));
-static unsigned char rx_ring[RX_BUF_LEN+16] __attribute__((aligned(4)));
+static unsigned char tx_buffer[TX_BUF_SIZE] __aligned(4);
+static unsigned char rx_ring[RX_BUF_LEN + 16] __aligned(4);
-static int rtl8139_probe(struct eth_device *dev, bd_t *bis);
+static int rtl8139_init(struct eth_device *dev, bd_t *bis);
static int rtl8139_read_eeprom(unsigned int location, unsigned int addr_len);
static void rtl8139_reset(struct eth_device *dev);
static int rtl8139_send(struct eth_device *dev, void *packet, int length);
static void rtl8139_stop(struct eth_device *dev);
static int rtl_bcast_addr(struct eth_device *dev, const u8 *bcast_mac, int join)
{
- return (0);
+ return 0;
}
static struct pci_device_id supported[] = {
- {PCI_VENDOR_ID_REALTEK, PCI_DEVICE_ID_REALTEK_8139},
- {PCI_VENDOR_ID_DLINK, PCI_DEVICE_ID_DLINK_8139},
- {}
+ { PCI_VENDOR_ID_REALTEK, PCI_DEVICE_ID_REALTEK_8139 },
+ { PCI_VENDOR_ID_DLINK, PCI_DEVICE_ID_DLINK_8139 },
+ { }
};
int rtl8139_initialize(bd_t *bis)
{
- pci_dev_t devno;
- int card_number = 0;
struct eth_device *dev;
+ int card_number = 0;
+ pci_dev_t devno;
+ int idx = 0;
u32 iobase;
- int idx=0;
- while(1){
+ while (1) {
/* Find RTL8139 */
- if ((devno = pci_find_devices(supported, idx++)) < 0)
+ devno = pci_find_devices(supported, idx++);
+ if (devno < 0)
break;
pci_read_config_dword(devno, PCI_BASE_ADDRESS_1, &iobase);
iobase &= ~0xf;
- debug ("rtl8139: REALTEK RTL8139 @0x%x\n", iobase);
+ debug("rtl8139: REALTEK RTL8139 @0x%x\n", iobase);
- dev = (struct eth_device *)malloc(sizeof *dev);
+ dev = (struct eth_device *)malloc(sizeof(*dev));
if (!dev) {
printf("Can not allocate memory of rtl8139\n");
break;
}
memset(dev, 0, sizeof(*dev));
- sprintf (dev->name, "RTL8139#%d", card_number);
+ sprintf(dev->name, "RTL8139#%d", card_number);
- dev->priv = (void *) devno;
+ dev->priv = (void *)devno;
dev->iobase = (int)bus_to_phys(iobase);
- dev->init = rtl8139_probe;
+ dev->init = rtl8139_init;
dev->halt = rtl8139_stop;
dev->send = rtl8139_send;
dev->recv = rtl8139_recv;
dev->mcast = rtl_bcast_addr;
- eth_register (dev);
+ eth_register(dev);
card_number++;
- pci_write_config_byte (devno, PCI_LATENCY_TIMER, 0x20);
+ pci_write_config_byte(devno, PCI_LATENCY_TIMER, 0x20);
- udelay (10 * 1000);
+ udelay(10 * 1000);
}
return card_number;
}
-static int rtl8139_probe(struct eth_device *dev, bd_t *bis)
+static int rtl8139_init(struct eth_device *dev, bd_t *bis)
{
- int i;
- int addr_len;
unsigned short *ap = (unsigned short *)dev->enetaddr;
+ int addr_len, i;
+ u8 reg;
ioaddr = dev->iobase;
/* Bring the chip out of low-power mode. */
outb(0x00, ioaddr + RTL_REG_CONFIG1);
- addr_len = rtl8139_read_eeprom(0,8) == 0x8129 ? 8 : 6;
+ addr_len = rtl8139_read_eeprom(0, 8) == 0x8129 ? 8 : 6;
for (i = 0; i < 3; i++)
- *ap++ = le16_to_cpu (rtl8139_read_eeprom(i + 7, addr_len));
+ *ap++ = le16_to_cpu(rtl8139_read_eeprom(i + 7, addr_len));
rtl8139_reset(dev);
- if (inb(ioaddr + RTL_REG_MEDIASTATUS) & RTL_REG_MEDIASTATUS_MSRLINKFAIL) {
+ reg = inb(ioaddr + RTL_REG_MEDIASTATUS);
+ if (reg & RTL_REG_MEDIASTATUS_MSRLINKFAIL) {
printf("Cable not connected or other link failure\n");
- return -1 ;
+ return -1;
}
return 0;
projects / oweals / u-boot.git / commitdiff