diff options
Diffstat (limited to 'drivers/net/7990.c')
| -rw-r--r-- | drivers/net/7990.c | 669 |
1 files changed, 0 insertions, 669 deletions
diff --git a/drivers/net/7990.c b/drivers/net/7990.c deleted file mode 100644 index 903bcb3ef5b..00000000000 --- a/drivers/net/7990.c +++ /dev/null @@ -1,669 +0,0 @@ -/* - * 7990.c -- LANCE ethernet IC generic routines. - * This is an attempt to separate out the bits of various ethernet - * drivers that are common because they all use the AMD 7990 LANCE - * (Local Area Network Controller for Ethernet) chip. - * - * Copyright (C) 05/1998 Peter Maydell <pmaydell@chiark.greenend.org.uk> - * - * Most of this stuff was obtained by looking at other LANCE drivers, - * in particular a2065.[ch]. The AMD C-LANCE datasheet was also helpful. - * NB: this was made easy by the fact that Jes Sorensen had cleaned up - * most of a2025 and sunlance with the aim of merging them, so the - * common code was pretty obvious. - */ -#include <linux/crc32.h> -#include <linux/delay.h> -#include <linux/errno.h> -#include <linux/netdevice.h> -#include <linux/etherdevice.h> -#include <linux/init.h> -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/types.h> -#include <linux/fcntl.h> -#include <linux/interrupt.h> -#include <linux/ioport.h> -#include <linux/in.h> -#include <linux/route.h> -#include <linux/string.h> -#include <linux/skbuff.h> -#include <asm/irq.h> -/* Used for the temporal inet entries and routing */ -#include <linux/socket.h> -#include <linux/bitops.h> - -#include <asm/system.h> -#include <asm/io.h> -#include <asm/dma.h> -#include <asm/pgtable.h> -#ifdef CONFIG_HP300 -#include <asm/blinken.h> -#endif - -#include "7990.h" - -#define WRITERAP(lp,x) out_be16(lp->base + LANCE_RAP, (x)) -#define WRITERDP(lp,x) out_be16(lp->base + LANCE_RDP, (x)) -#define READRDP(lp) in_be16(lp->base + LANCE_RDP) - -#if defined(CONFIG_HPLANCE) || defined(CONFIG_HPLANCE_MODULE) -#include "hplance.h" - -#undef WRITERAP -#undef WRITERDP -#undef READRDP - -#if defined(CONFIG_MVME147_NET) || defined(CONFIG_MVME147_NET_MODULE) - -/* Lossage Factor Nine, Mr Sulu. */ -#define WRITERAP(lp,x) (lp->writerap(lp,x)) -#define WRITERDP(lp,x) (lp->writerdp(lp,x)) -#define READRDP(lp) (lp->readrdp(lp)) - -#else - -/* These inlines can be used if only CONFIG_HPLANCE is defined */ -static inline void WRITERAP(struct lance_private *lp, __u16 value) -{ - do { - out_be16(lp->base + HPLANCE_REGOFF + LANCE_RAP, value); - } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); -} - -static inline void WRITERDP(struct lance_private *lp, __u16 value) -{ - do { - out_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP, value); - } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); -} - -static inline __u16 READRDP(struct lance_private *lp) -{ - __u16 value; - do { - value = in_be16(lp->base + HPLANCE_REGOFF + LANCE_RDP); - } while ((in_8(lp->base + HPLANCE_STATUS) & LE_ACK) == 0); - return value; -} - -#endif -#endif /* CONFIG_HPLANCE || CONFIG_HPLANCE_MODULE */ - -/* debugging output macros, various flavours */ -/* #define TEST_HITS */ -#ifdef UNDEF -#define PRINT_RINGS() \ -do { \ - int t; \ - for (t=0; t < RX_RING_SIZE; t++) { \ - printk("R%d: @(%02X %04X) len %04X, mblen %04X, bits %02X\n",\ - t, ib->brx_ring[t].rmd1_hadr, ib->brx_ring[t].rmd0,\ - ib->brx_ring[t].length,\ - ib->brx_ring[t].mblength, ib->brx_ring[t].rmd1_bits);\ - }\ - for (t=0; t < TX_RING_SIZE; t++) { \ - printk("T%d: @(%02X %04X) len %04X, misc %04X, bits %02X\n",\ - t, ib->btx_ring[t].tmd1_hadr, ib->btx_ring[t].tmd0,\ - ib->btx_ring[t].length,\ - ib->btx_ring[t].misc, ib->btx_ring[t].tmd1_bits);\ - }\ -} while (0) -#else -#define PRINT_RINGS() -#endif - -/* Load the CSR registers. The LANCE has to be STOPped when we do this! */ -static void load_csrs (struct lance_private *lp) -{ - volatile struct lance_init_block *aib = lp->lance_init_block; - int leptr; - - leptr = LANCE_ADDR (aib); - - WRITERAP(lp, LE_CSR1); /* load address of init block */ - WRITERDP(lp, leptr & 0xFFFF); - WRITERAP(lp, LE_CSR2); - WRITERDP(lp, leptr >> 16); - WRITERAP(lp, LE_CSR3); - WRITERDP(lp, lp->busmaster_regval); /* set byteswap/ALEctrl/byte ctrl */ - - /* Point back to csr0 */ - WRITERAP(lp, LE_CSR0); -} - -/* #define to 0 or 1 appropriately */ -#define DEBUG_IRING 0 -/* Set up the Lance Rx and Tx rings and the init block */ -static void lance_init_ring (struct net_device *dev) -{ - struct lance_private *lp = netdev_priv(dev); - volatile struct lance_init_block *ib = lp->init_block; - volatile struct lance_init_block *aib; /* for LANCE_ADDR computations */ - int leptr; - int i; - - aib = lp->lance_init_block; - - lp->rx_new = lp->tx_new = 0; - lp->rx_old = lp->tx_old = 0; - - ib->mode = LE_MO_PROM; /* normal, enable Tx & Rx */ - - /* Copy the ethernet address to the lance init block - * Notice that we do a byteswap if we're big endian. - * [I think this is the right criterion; at least, sunlance, - * a2065 and atarilance do the byteswap and lance.c (PC) doesn't. - * However, the datasheet says that the BSWAP bit doesn't affect - * the init block, so surely it should be low byte first for - * everybody? Um.] - * We could define the ib->physaddr as three 16bit values and - * use (addr[1] << 8) | addr[0] & co, but this is more efficient. - */ -#ifdef __BIG_ENDIAN - ib->phys_addr [0] = dev->dev_addr [1]; - ib->phys_addr [1] = dev->dev_addr [0]; - ib->phys_addr [2] = dev->dev_addr [3]; - ib->phys_addr [3] = dev->dev_addr [2]; - ib->phys_addr [4] = dev->dev_addr [5]; - ib->phys_addr [5] = dev->dev_addr [4]; -#else - for (i=0; i<6; i++) - ib->phys_addr[i] = dev->dev_addr[i]; -#endif - - if (DEBUG_IRING) - printk ("TX rings:\n"); - - lp->tx_full = 0; - /* Setup the Tx ring entries */ - for (i = 0; i < (1<<lp->lance_log_tx_bufs); i++) { - leptr = LANCE_ADDR(&aib->tx_buf[i][0]); - ib->btx_ring [i].tmd0 = leptr; - ib->btx_ring [i].tmd1_hadr = leptr >> 16; - ib->btx_ring [i].tmd1_bits = 0; - ib->btx_ring [i].length = 0xf000; /* The ones required by tmd2 */ - ib->btx_ring [i].misc = 0; - if (DEBUG_IRING) - printk ("%d: 0x%8.8x\n", i, leptr); - } - - /* Setup the Rx ring entries */ - if (DEBUG_IRING) - printk ("RX rings:\n"); - for (i = 0; i < (1<<lp->lance_log_rx_bufs); i++) { - leptr = LANCE_ADDR(&aib->rx_buf[i][0]); - - ib->brx_ring [i].rmd0 = leptr; - ib->brx_ring [i].rmd1_hadr = leptr >> 16; - ib->brx_ring [i].rmd1_bits = LE_R1_OWN; - /* 0xf000 == bits that must be one (reserved, presumably) */ - ib->brx_ring [i].length = -RX_BUFF_SIZE | 0xf000; - ib->brx_ring [i].mblength = 0; - if (DEBUG_IRING) - printk ("%d: 0x%8.8x\n", i, leptr); - } - - /* Setup the initialization block */ - - /* Setup rx descriptor pointer */ - leptr = LANCE_ADDR(&aib->brx_ring); - ib->rx_len = (lp->lance_log_rx_bufs << 13) | (leptr >> 16); - ib->rx_ptr = leptr; - if (DEBUG_IRING) - printk ("RX ptr: %8.8x\n", leptr); - - /* Setup tx descriptor pointer */ - leptr = LANCE_ADDR(&aib->btx_ring); - ib->tx_len = (lp->lance_log_tx_bufs << 13) | (leptr >> 16); - ib->tx_ptr = leptr; - if (DEBUG_IRING) - printk ("TX ptr: %8.8x\n", leptr); - - /* Clear the multicast filter */ - ib->filter [0] = 0; - ib->filter [1] = 0; - PRINT_RINGS(); -} - -/* LANCE must be STOPped before we do this, too... */ -static int init_restart_lance (struct lance_private *lp) -{ - int i; - - WRITERAP(lp, LE_CSR0); - WRITERDP(lp, LE_C0_INIT); - - /* Need a hook here for sunlance ledma stuff */ - - /* Wait for the lance to complete initialization */ - for (i = 0; (i < 100) && !(READRDP(lp) & (LE_C0_ERR | LE_C0_IDON)); i++) - barrier(); - if ((i == 100) || (READRDP(lp) & LE_C0_ERR)) { - printk ("LANCE unopened after %d ticks, csr0=%4.4x.\n", i, READRDP(lp)); - return -1; - } - - /* Clear IDON by writing a "1", enable interrupts and start lance */ - WRITERDP(lp, LE_C0_IDON); - WRITERDP(lp, LE_C0_INEA | LE_C0_STRT); - - return 0; -} - -static int lance_reset (struct net_device *dev) -{ - struct lance_private *lp = netdev_priv(dev); - int status; - - /* Stop the lance */ - WRITERAP(lp, LE_CSR0); - WRITERDP(lp, LE_C0_STOP); - - load_csrs (lp); - lance_init_ring (dev); - dev->trans_start = jiffies; /* prevent tx timeout */ - status = init_restart_lance (lp); -#ifdef DEBUG_DRIVER - printk ("Lance restart=%d\n", status); -#endif - return status; -} - -static int lance_rx (struct net_device *dev) -{ - struct lance_private *lp = netdev_priv(dev); - volatile struct lance_init_block *ib = lp->init_block; - volatile struct lance_rx_desc *rd; - unsigned char bits; -#ifdef TEST_HITS - int i; -#endif - -#ifdef TEST_HITS - printk ("["); - for (i = 0; i < RX_RING_SIZE; i++) { - if (i == lp->rx_new) - printk ("%s", - ib->brx_ring [i].rmd1_bits & LE_R1_OWN ? "_" : "X"); - else - printk ("%s", - ib->brx_ring [i].rmd1_bits & LE_R1_OWN ? "." : "1"); - } - printk ("]"); -#endif -#ifdef CONFIG_HP300 - blinken_leds(0x40, 0); -#endif - WRITERDP(lp, LE_C0_RINT | LE_C0_INEA); /* ack Rx int, reenable ints */ - for (rd = &ib->brx_ring [lp->rx_new]; /* For each Rx ring we own... */ - !((bits = rd->rmd1_bits) & LE_R1_OWN); - rd = &ib->brx_ring [lp->rx_new]) { - - /* We got an incomplete frame? */ - if ((bits & LE_R1_POK) != LE_R1_POK) { - dev->stats.rx_over_errors++; - dev->stats.rx_errors++; - continue; - } else if (bits & LE_R1_ERR) { - /* Count only the end frame as a rx error, - * not the beginning - */ - if (bits & LE_R1_BUF) dev->stats.rx_fifo_errors++; - if (bits & LE_R1_CRC) dev->stats.rx_crc_errors++; - if (bits & LE_R1_OFL) dev->stats.rx_over_errors++; - if (bits & LE_R1_FRA) dev->stats.rx_frame_errors++; - if (bits & LE_R1_EOP) dev->stats.rx_errors++; - } else { - int len = (rd->mblength & 0xfff) - 4; - struct sk_buff *skb = dev_alloc_skb (len+2); - - if (!skb) { - printk ("%s: Memory squeeze, deferring packet.\n", - dev->name); - dev->stats.rx_dropped++; - rd->mblength = 0; - rd->rmd1_bits = LE_R1_OWN; - lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask; - return 0; - } - - skb_reserve (skb, 2); /* 16 byte align */ - skb_put (skb, len); /* make room */ - skb_copy_to_linear_data(skb, - (unsigned char *)&(ib->rx_buf [lp->rx_new][0]), - len); - skb->protocol = eth_type_trans (skb, dev); - netif_rx (skb); - dev->stats.rx_packets++; - dev->stats.rx_bytes += len; - } - - /* Return the packet to the pool */ - rd->mblength = 0; - rd->rmd1_bits = LE_R1_OWN; - lp->rx_new = (lp->rx_new + 1) & lp->rx_ring_mod_mask; - } - return 0; -} - -static int lance_tx (struct net_device *dev) -{ - struct lance_private *lp = netdev_priv(dev); - volatile struct lance_init_block *ib = lp->init_block; - volatile struct lance_tx_desc *td; - int i, j; - int status; - -#ifdef CONFIG_HP300 - blinken_leds(0x80, 0); -#endif - /* csr0 is 2f3 */ - WRITERDP(lp, LE_C0_TINT | LE_C0_INEA); - /* csr0 is 73 */ - - j = lp->tx_old; - for (i = j; i != lp->tx_new; i = j) { - td = &ib->btx_ring [i]; - - /* If we hit a packet not owned by us, stop */ - if (td->tmd1_bits & LE_T1_OWN) - break; - - if (td->tmd1_bits & LE_T1_ERR) { - status = td->misc; - - dev->stats.tx_errors++; - if (status & LE_T3_RTY) dev->stats.tx_aborted_errors++; - if (status & LE_T3_LCOL) dev->stats.tx_window_errors++; - - if (status & LE_T3_CLOS) { - dev->stats.tx_carrier_errors++; - if (lp->auto_select) { - lp->tpe = 1 - lp->tpe; - printk("%s: Carrier Lost, trying %s\n", - dev->name, lp->tpe?"TPE":"AUI"); - /* Stop the lance */ - WRITERAP(lp, LE_CSR0); - WRITERDP(lp, LE_C0_STOP); - lance_init_ring (dev); - load_csrs (lp); - init_restart_lance (lp); - return 0; - } - } - - /* buffer errors and underflows turn off the transmitter */ - /* Restart the adapter */ - if (status & (LE_T3_BUF|LE_T3_UFL)) { - dev->stats.tx_fifo_errors++; - - printk ("%s: Tx: ERR_BUF|ERR_UFL, restarting\n", - dev->name); - /* Stop the lance */ - WRITERAP(lp, LE_CSR0); - WRITERDP(lp, LE_C0_STOP); - lance_init_ring (dev); - load_csrs (lp); - init_restart_lance (lp); - return 0; - } - } else if ((td->tmd1_bits & LE_T1_POK) == LE_T1_POK) { - /* - * So we don't count the packet more than once. - */ - td->tmd1_bits &= ~(LE_T1_POK); - - /* One collision before packet was sent. */ - if (td->tmd1_bits & LE_T1_EONE) - dev->stats.collisions++; - - /* More than one collision, be optimistic. */ - if (td->tmd1_bits & LE_T1_EMORE) - dev->stats.collisions += 2; - - dev->stats.tx_packets++; - } - - j = (j + 1) & lp->tx_ring_mod_mask; - } - lp->tx_old = j; - WRITERDP(lp, LE_C0_TINT | LE_C0_INEA); - return 0; -} - -static irqreturn_t -lance_interrupt (int irq, void *dev_id) -{ - struct net_device *dev = (struct net_device *)dev_id; - struct lance_private *lp = netdev_priv(dev); - int csr0; - - spin_lock (&lp->devlock); - - WRITERAP(lp, LE_CSR0); /* LANCE Controller Status */ - csr0 = READRDP(lp); - - PRINT_RINGS(); - - if (!(csr0 & LE_C0_INTR)) { /* Check if any interrupt has */ - spin_unlock (&lp->devlock); - return IRQ_NONE; /* been generated by the Lance. */ - } - - /* Acknowledge all the interrupt sources ASAP */ - WRITERDP(lp, csr0 & ~(LE_C0_INEA|LE_C0_TDMD|LE_C0_STOP|LE_C0_STRT|LE_C0_INIT)); - - if ((csr0 & LE_C0_ERR)) { - /* Clear the error condition */ - WRITERDP(lp, LE_C0_BABL|LE_C0_ERR|LE_C0_MISS|LE_C0_INEA); - } - - if (csr0 & LE_C0_RINT) - lance_rx (dev); - - if (csr0 & LE_C0_TINT) - lance_tx (dev); - - /* Log misc errors. */ - if (csr0 & LE_C0_BABL) - dev->stats.tx_errors++; /* Tx babble. */ - if (csr0 & LE_C0_MISS) - dev->stats.rx_errors++; /* Missed a Rx frame. */ - if (csr0 & LE_C0_MERR) { - printk("%s: Bus master arbitration failure, status %4.4x.\n", - dev->name, csr0); - /* Restart the chip. */ - WRITERDP(lp, LE_C0_STRT); - } - - if (lp->tx_full && netif_queue_stopped(dev) && (TX_BUFFS_AVAIL >= 0)) { - lp->tx_full = 0; - netif_wake_queue (dev); - } - - WRITERAP(lp, LE_CSR0); - WRITERDP(lp, LE_C0_BABL|LE_C0_CERR|LE_C0_MISS|LE_C0_MERR|LE_C0_IDON|LE_C0_INEA); - - spin_unlock (&lp->devlock); - return IRQ_HANDLED; -} - -int lance_open (struct net_device *dev) -{ - struct lance_private *lp = netdev_priv(dev); - int res; - - /* Install the Interrupt handler. Or we could shunt this out to specific drivers? */ - if (request_irq(lp->irq, lance_interrupt, IRQF_SHARED, lp->name, dev)) - return -EAGAIN; - - res = lance_reset(dev); - spin_lock_init(&lp->devlock); - netif_start_queue (dev); - - return res; -} -EXPORT_SYMBOL_GPL(lance_open); - -int lance_close (struct net_device *dev) -{ - struct lance_private *lp = netdev_priv(dev); - - netif_stop_queue (dev); - - /* Stop the LANCE */ - WRITERAP(lp, LE_CSR0); - WRITERDP(lp, LE_C0_STOP); - - free_irq(lp->irq, dev); - - return 0; -} -EXPORT_SYMBOL_GPL(lance_close); - -void lance_tx_timeout(struct net_device *dev) -{ - printk("lance_tx_timeout\n"); - lance_reset(dev); - dev->trans_start = jiffies; /* prevent tx timeout */ - netif_wake_queue (dev); -} -EXPORT_SYMBOL_GPL(lance_tx_timeout); - -int lance_start_xmit (struct sk_buff *skb, struct net_device *dev) -{ - struct lance_private *lp = netdev_priv(dev); - volatile struct lance_init_block *ib = lp->init_block; - int entry, skblen, len; - static int outs; - unsigned long flags; - - if (!TX_BUFFS_AVAIL) - return NETDEV_TX_LOCKED; - - netif_stop_queue (dev); - - skblen = skb->len; - -#ifdef DEBUG_DRIVER - /* dump the packet */ - { - int i; - - for (i = 0; i < 64; i++) { - if ((i % 16) == 0) - printk ("\n"); - printk ("%2.2x ", skb->data [i]); - } - } -#endif - len = (skblen <= ETH_ZLEN) ? ETH_ZLEN : skblen; - entry = lp->tx_new & lp->tx_ring_mod_mask; - ib->btx_ring [entry].length = (-len) | 0xf000; - ib->btx_ring [entry].misc = 0; - - if (skb->len < ETH_ZLEN) - memset((void *)&ib->tx_buf[entry][0], 0, ETH_ZLEN); - skb_copy_from_linear_data(skb, (void *)&ib->tx_buf[entry][0], skblen); - - /* Now, give the packet to the lance */ - ib->btx_ring [entry].tmd1_bits = (LE_T1_POK|LE_T1_OWN); - lp->tx_new = (lp->tx_new+1) & lp->tx_ring_mod_mask; - - outs++; - /* Kick the lance: transmit now */ - WRITERDP(lp, LE_C0_INEA | LE_C0_TDMD); - dev_kfree_skb (skb); - - spin_lock_irqsave (&lp->devlock, flags); - if (TX_BUFFS_AVAIL) - netif_start_queue (dev); - else - lp->tx_full = 1; - spin_unlock_irqrestore (&lp->devlock, flags); - - return NETDEV_TX_OK; -} -EXPORT_SYMBOL_GPL(lance_start_xmit); - -/* taken from the depca driver via a2065.c */ -static void lance_load_multicast (struct net_device *dev) -{ - struct lance_private *lp = netdev_priv(dev); - volatile struct lance_init_block *ib = lp->init_block; - volatile u16 *mcast_table = (u16 *)&ib->filter; - struct netdev_hw_addr *ha; - char *addrs; - u32 crc; - - /* set all multicast bits */ - if (dev->flags & IFF_ALLMULTI){ - ib->filter [0] = 0xffffffff; - ib->filter [1] = 0xffffffff; - return; - } - /* clear the multicast filter */ - ib->filter [0] = 0; - ib->filter [1] = 0; - - /* Add addresses */ - netdev_for_each_mc_addr(ha, dev) { - addrs = ha->addr; - - /* multicast address? */ - if (!(*addrs & 1)) - continue; - - crc = ether_crc_le(6, addrs); - crc = crc >> 26; - mcast_table [crc >> 4] |= 1 << (crc & 0xf); - } -} - - -void lance_set_multicast (struct net_device *dev) -{ - struct lance_private *lp = netdev_priv(dev); - volatile struct lance_init_block *ib = lp->init_block; - int stopped; - - stopped = netif_queue_stopped(dev); - if (!stopped) - netif_stop_queue (dev); - - while (lp->tx_old != lp->tx_new) - schedule(); - - WRITERAP(lp, LE_CSR0); - WRITERDP(lp, LE_C0_STOP); - lance_init_ring (dev); - - if (dev->flags & IFF_PROMISC) { - ib->mode |= LE_MO_PROM; - } else { - ib->mode &= ~LE_MO_PROM; - lance_load_multicast (dev); - } - load_csrs (lp); - init_restart_lance (lp); - - if (!stopped) - netif_start_queue (dev); -} -EXPORT_SYMBOL_GPL(lance_set_multicast); - -#ifdef CONFIG_NET_POLL_CONTROLLER -void lance_poll(struct net_device *dev) -{ - struct lance_private *lp = netdev_priv(dev); - - spin_lock (&lp->devlock); - WRITERAP(lp, LE_CSR0); - WRITERDP(lp, LE_C0_STRT); - spin_unlock (&lp->devlock); - lance_interrupt(dev->irq, dev); -} -#endif - -MODULE_LICENSE("GPL"); |