+// SPDX-License-Identifier: GPL-2.0
/*
* rtl8139.c : U-Boot driver for the RealTek RTL8139
*
*/
/* 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
+ *
+ * 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>
-#include <linux/types.h>
+#include <log.h>
#include <malloc.h>
#include <net.h>
#include <netdev.h>
#include <asm/io.h>
#include <pci.h>
+#include <linux/bitops.h>
+#include <linux/delay.h>
+#include <linux/types.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_RXBADALIGN BIT(1)
#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 int rtl8139_probe(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 int rtl8139_recv(struct eth_device *dev);
-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);
-}
-
-static struct pci_device_id supported[] = {
- {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;
- u32 iobase;
- int idx=0;
-
- while(1){
- /* Find RTL8139 */
- if ((devno = pci_find_devices(supported, idx++)) < 0)
- break;
-
- pci_read_config_dword(devno, PCI_BASE_ADDRESS_1, &iobase);
- iobase &= ~0xf;
-
- debug ("rtl8139: REALTEK RTL8139 @0x%x\n", iobase);
-
- 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);
-
- dev->priv = (void *) devno;
- dev->iobase = (int)bus_to_phys(iobase);
- dev->init = rtl8139_probe;
- dev->halt = rtl8139_stop;
- dev->send = rtl8139_send;
- dev->recv = rtl8139_recv;
- dev->mcast = rtl_bcast_addr;
-
- eth_register (dev);
-
- card_number++;
-
- pci_write_config_byte (devno, PCI_LATENCY_TIMER, 0x20);
-
- udelay (10 * 1000);
- }
-
- return card_number;
-}
-
-static int rtl8139_probe(struct eth_device *dev, bd_t *bis)
-{
- int i;
- int addr_len;
- unsigned short *ap = (unsigned short *)dev->enetaddr;
-
- 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;
- for (i = 0; i < 3; i++)
- *ap++ = le16_to_cpu (rtl8139_read_eeprom(i + 7, addr_len));
-
- rtl8139_reset(dev);
-
- if (inb(ioaddr + RTL_REG_MEDIASTATUS) & RTL_REG_MEDIASTATUS_MSRLINKFAIL) {
- printf("Cable not connected or other link failure\n");
- return -1 ;
- }
-
- return 0;
-}
+static unsigned char tx_buffer[TX_BUF_SIZE] __aligned(4);
+static unsigned char rx_ring[RX_BUF_LEN + 16] __aligned(4);
/* Serial EEPROM section. */
inl(regbase + RTL_REG_CFG9346);
}
-static int rtl8139_read_eeprom(unsigned int location, unsigned int addr_len)
+static int rtl8139_read_eeprom(struct eth_device *dev,
+ unsigned int location, unsigned int addr_len)
{
unsigned int read_cmd = location | (EE_READ_CMD << addr_len);
- uintptr_t ee_addr = ioaddr + RTL_REG_CFG9346;
+ uintptr_t ee_addr = dev->iobase + RTL_REG_CFG9346;
unsigned int retval = 0;
u8 dataval;
int i;
outb(EE_ENB & ~EE_CS, ee_addr);
outb(EE_ENB, ee_addr);
- rtl8139_eeprom_delay(ioaddr);
+ rtl8139_eeprom_delay(dev->iobase);
/* Shift the read command bits out. */
for (i = 4 + addr_len; i >= 0; i--) {
dataval = (read_cmd & BIT(i)) ? EE_DATA_WRITE : 0;
outb(EE_ENB | dataval, ee_addr);
- rtl8139_eeprom_delay(ioaddr);
+ rtl8139_eeprom_delay(dev->iobase);
outb(EE_ENB | dataval | EE_SHIFT_CLK, ee_addr);
- rtl8139_eeprom_delay(ioaddr);
+ rtl8139_eeprom_delay(dev->iobase);
}
outb(EE_ENB, ee_addr);
- rtl8139_eeprom_delay(ioaddr);
+ rtl8139_eeprom_delay(dev->iobase);
for (i = 16; i > 0; i--) {
outb(EE_ENB | EE_SHIFT_CLK, ee_addr);
- rtl8139_eeprom_delay(ioaddr);
+ rtl8139_eeprom_delay(dev->iobase);
retval <<= 1;
retval |= inb(ee_addr) & EE_DATA_READ;
outb(EE_ENB, ee_addr);
- rtl8139_eeprom_delay(ioaddr);
+ rtl8139_eeprom_delay(dev->iobase);
}
/* Terminate the EEPROM access. */
outb(~EE_CS, ee_addr);
- rtl8139_eeprom_delay(ioaddr);
+ rtl8139_eeprom_delay(dev->iobase);
return retval;
}
RTL_REG_RXCONFIG_ACCEPTMULTICAST |
RTL_REG_RXCONFIG_ACCEPTMYPHYS;
- outl(rtl8139_rx_config | rx_mode, ioaddr + RTL_REG_RXCONFIG);
+ outl(rtl8139_rx_config | rx_mode, dev->iobase + RTL_REG_RXCONFIG);
- outl(0xffffffff, ioaddr + RTL_REG_MAR0 + 0);
- outl(0xffffffff, ioaddr + RTL_REG_MAR0 + 4);
+ outl(0xffffffff, dev->iobase + RTL_REG_MAR0 + 0);
+ outl(0xffffffff, dev->iobase + RTL_REG_MAR0 + 4);
}
static void rtl8139_hw_reset(struct eth_device *dev)
u8 reg;
int i;
- outb(RTL_REG_CHIPCMD_CMDRESET, ioaddr + RTL_REG_CHIPCMD);
+ outb(RTL_REG_CHIPCMD_CMDRESET, dev->iobase + RTL_REG_CHIPCMD);
/* Give the chip 10ms to finish the reset. */
for (i = 0; i < 100; i++) {
- reg = inb(ioaddr + RTL_REG_CHIPCMD);
+ reg = inb(dev->iobase + RTL_REG_CHIPCMD);
if (!(reg & RTL_REG_CHIPCMD_CMDRESET))
break;
rtl8139_hw_reset(dev);
for (i = 0; i < ETH_ALEN; i++)
- outb(dev->enetaddr[i], ioaddr + RTL_REG_MAC0 + i);
+ outb(dev->enetaddr[i], dev->iobase + RTL_REG_MAC0 + i);
/* Must enable Tx/Rx before setting transfer thresholds! */
outb(RTL_REG_CHIPCMD_CMDRXENB | RTL_REG_CHIPCMD_CMDTXENB,
- ioaddr + RTL_REG_CHIPCMD);
+ dev->iobase + RTL_REG_CHIPCMD);
/* accept no frames yet! */
- outl(rtl8139_rx_config, ioaddr + RTL_REG_RXCONFIG);
- outl((TX_DMA_BURST << 8) | 0x03000000, ioaddr + RTL_REG_TXCONFIG);
+ outl(rtl8139_rx_config, dev->iobase + RTL_REG_RXCONFIG);
+ outl((TX_DMA_BURST << 8) | 0x03000000, dev->iobase + RTL_REG_TXCONFIG);
/*
* The Linux driver changes RTL_REG_CONFIG1 here to use a different
debug_cond(DEBUG_RX, "rx ring address is %p\n", rx_ring);
flush_cache((unsigned long)rx_ring, RX_BUF_LEN);
- outl(phys_to_bus((int)rx_ring), ioaddr + RTL_REG_RXBUF);
+ outl(phys_to_bus((int)rx_ring), dev->iobase + RTL_REG_RXBUF);
/*
* If we add multicast support, the RTL_REG_MAR0 register would have
* unicast.
*/
outb(RTL_REG_CHIPCMD_CMDRXENB | RTL_REG_CHIPCMD_CMDTXENB,
- ioaddr + RTL_REG_CHIPCMD);
+ dev->iobase + RTL_REG_CHIPCMD);
- outl(rtl8139_rx_config, ioaddr + RTL_REG_RXCONFIG);
+ outl(rtl8139_rx_config, dev->iobase + RTL_REG_RXCONFIG);
/* Start the chip's Tx and Rx process. */
- outl(0, ioaddr + RTL_REG_RXMISSED);
+ outl(0, dev->iobase + RTL_REG_RXMISSED);
rtl8139_set_rx_mode(dev);
/* Disable all known interrupts by setting the interrupt mask. */
- outw(0, ioaddr + RTL_REG_INTRMASK);
+ outw(0, dev->iobase + RTL_REG_INTRMASK);
}
static int rtl8139_send(struct eth_device *dev, void *packet, int length)
unsigned int status;
int i = 0;
- ioaddr = dev->iobase;
-
memcpy(tx_buffer, packet, length);
debug_cond(DEBUG_TX, "sending %d bytes\n", len);
flush_cache((unsigned long)tx_buffer, length);
outl(phys_to_bus((unsigned long)tx_buffer),
- ioaddr + RTL_REG_TXADDR0 + cur_tx * 4);
+ dev->iobase + RTL_REG_TXADDR0 + cur_tx * 4);
outl(((TX_FIFO_THRESH << 11) & 0x003f0000) | len,
- ioaddr + RTL_REG_TXSTATUS0 + cur_tx * 4);
+ dev->iobase + RTL_REG_TXSTATUS0 + cur_tx * 4);
do {
- status = inw(ioaddr + RTL_REG_INTRSTATUS);
+ status = inw(dev->iobase + RTL_REG_INTRSTATUS);
/*
* Only acknlowledge interrupt sources we can properly
* handle here - the RTL_REG_INTRSTATUS_RXOVERFLOW/
*/
status &= RTL_REG_INTRSTATUS_TXOK | RTL_REG_INTRSTATUS_TXERR |
RTL_REG_INTRSTATUS_PCIERR;
- outw(status, ioaddr + RTL_REG_INTRSTATUS);
+ outw(status, dev->iobase + RTL_REG_INTRSTATUS);
if (status)
break;
udelay(10);
} while (i++ < RTL_TIMEOUT);
- txstatus = inl(ioaddr + RTL_REG_TXSTATUS0 + cur_tx * 4);
+ txstatus = inl(dev->iobase + RTL_REG_TXSTATUS0 + cur_tx * 4);
if (!(status & RTL_REG_INTRSTATUS_TXOK)) {
debug_cond(DEBUG_TX,
unsigned int status;
int length = 0;
- ioaddr = dev->iobase;
-
- if (inb(ioaddr + RTL_REG_CHIPCMD) & RTL_REG_CHIPCMD_RXBUFEMPTY)
+ if (inb(dev->iobase + RTL_REG_CHIPCMD) & RTL_REG_CHIPCMD_RXBUFEMPTY)
return 0;
- status = inw(ioaddr + RTL_REG_INTRSTATUS);
+ status = inw(dev->iobase + RTL_REG_INTRSTATUS);
/* See below for the rest of the interrupt acknowledges. */
- outw(status & ~rxstat, ioaddr + RTL_REG_INTRSTATUS);
+ outw(status & ~rxstat, dev->iobase + RTL_REG_INTRSTATUS);
debug_cond(DEBUG_RX, "%s: int %hX ", __func__, status);
flush_cache((unsigned long)rx_ring, RX_BUF_LEN);
cur_rx = ROUND(cur_rx + rx_size + 4, 4);
- outw(cur_rx - 16, ioaddr + RTL_REG_RXBUFPTR);
+ outw(cur_rx - 16, dev->iobase + RTL_REG_RXBUFPTR);
/*
* See RTL8139 Programming Guide V0.1 for the official handling of
* Rx overflow situations. The document itself contains basically
* no usable information, except for a few exception handling rules.
*/
- outw(status & rxstat, ioaddr + RTL_REG_INTRSTATUS);
+ outw(status & rxstat, dev->iobase + RTL_REG_INTRSTATUS);
return length;
}
-static void rtl8139_stop(struct eth_device *dev)
+static int rtl8139_init(struct eth_device *dev, bd_t *bis)
{
- ioaddr = dev->iobase;
+ unsigned short *ap = (unsigned short *)dev->enetaddr;
+ int addr_len, i;
+ u8 reg;
+
+ /* Bring the chip out of low-power mode. */
+ outb(0x00, dev->iobase + RTL_REG_CONFIG1);
+
+ addr_len = rtl8139_read_eeprom(dev, 0, 8) == 0x8129 ? 8 : 6;
+ for (i = 0; i < 3; i++)
+ *ap++ = le16_to_cpu(rtl8139_read_eeprom(dev, i + 7, addr_len));
+
+ rtl8139_reset(dev);
+
+ reg = inb(dev->iobase + RTL_REG_MEDIASTATUS);
+ if (reg & RTL_REG_MEDIASTATUS_MSRLINKFAIL) {
+ printf("Cable not connected or other link failure\n");
+ return -1;
+ }
+ return 0;
+}
+
+static void rtl8139_stop(struct eth_device *dev)
+{
rtl8139_hw_reset(dev);
}
+
+static int rtl8139_bcast_addr(struct eth_device *dev, const u8 *bcast_mac,
+ int join)
+{
+ return 0;
+}
+
+static void rtl8139_name(char *str, int card_number)
+{
+ sprintf(str, "RTL8139#%u", card_number);
+}
+
+static struct pci_device_id supported[] = {
+ { PCI_VENDOR_ID_REALTEK, PCI_DEVICE_ID_REALTEK_8139 },
+ { PCI_VENDOR_ID_DLINK, PCI_DEVICE_ID_DLINK_8139 },
+ { }
+};
+
+int rtl8139_initialize(bd_t *bis)
+{
+ struct eth_device *dev;
+ int card_number = 0;
+ pci_dev_t devno;
+ int idx = 0;
+ u32 iobase;
+
+ while (1) {
+ /* Find RTL8139 */
+ 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);
+
+ dev = calloc(1, sizeof(*dev));
+ if (!dev) {
+ printf("Can not allocate memory of rtl8139\n");
+ break;
+ }
+
+ rtl8139_name(dev->name, card_number);
+
+ dev->priv = (void *)devno;
+ dev->iobase = (int)bus_to_phys(iobase);
+ dev->init = rtl8139_init;
+ dev->halt = rtl8139_stop;
+ dev->send = rtl8139_send;
+ dev->recv = rtl8139_recv;
+ dev->mcast = rtl8139_bcast_addr;
+
+ eth_register(dev);
+
+ card_number++;
+
+ pci_write_config_byte(devno, PCI_LATENCY_TIMER, 0x20);
+
+ udelay(10 * 1000);
+ }
+
+ return card_number;
+}
projects / platform / kernel / u-boot.git / blobdiff