diff options
Diffstat (limited to 'drivers/net/sk_mca.c')
| -rw-r--r-- | drivers/net/sk_mca.c | 1216 |
1 files changed, 0 insertions, 1216 deletions
diff --git a/drivers/net/sk_mca.c b/drivers/net/sk_mca.c deleted file mode 100644 index 96e06c5..0000000 --- a/drivers/net/sk_mca.c +++ /dev/null @@ -1,1216 +0,0 @@ -/* -net-3-driver for the SKNET MCA-based cards - -This is an extension to the Linux operating system, and is covered by the -same GNU General Public License that covers that work. - -Copyright 1999 by Alfred Arnold (alfred@ccac.rwth-aachen.de, - alfred.arnold@lancom.de) - -This driver is based both on the 3C523 driver and the SK_G16 driver. - -paper sources: - 'PC Hardware: Aufbau, Funktionsweise, Programmierung' by - Hans-Peter Messmer for the basic Microchannel stuff - - 'Linux Geraetetreiber' by Allesandro Rubini, Kalle Dalheimer - for help on Ethernet driver programming - - 'Ethernet/IEEE 802.3 Family 1992 World Network Data Book/Handbook' by AMD - for documentation on the AM7990 LANCE - - 'SKNET Personal Technisches Manual', Version 1.2 by Schneider&Koch - for documentation on the Junior board - - 'SK-NET MC2+ Technical Manual", Version 1.1 by Schneider&Koch for - documentation on the MC2 bord - - A big thank you to the S&K support for providing me so quickly with - documentation! - - Also see http://www.syskonnect.com/ - - Missing things: - - -> set debug level via ioctl instead of compile-time switches - -> I didn't follow the development of the 2.1.x kernels, so my - assumptions about which things changed with which kernel version - are probably nonsense - -History: - May 16th, 1999 - startup - May 22st, 1999 - added private structure, methods - begun building data structures in RAM - May 23nd, 1999 - can receive frames, send frames - May 24th, 1999 - modularized initialization of LANCE - loadable as module - still Tx problem :-( - May 26th, 1999 - MC2 works - support for multiple devices - display media type for MC2+ - May 28th, 1999 - fixed problem in GetLANCE leaving interrupts turned off - increase TX queue to 4 packets to improve send performance - May 29th, 1999 - a few corrections in statistics, caught rcvr overruns - reinitialization of LANCE/board in critical situations - MCA info implemented - implemented LANCE multicast filter - Jun 6th, 1999 - additions for Linux 2.2 - Dec 25th, 1999 - unfortunately there seem to be newer MC2+ boards that react - on IRQ 3/5/9/10 instead of 3/5/10/11, so we have to autoprobe - in questionable cases... - Dec 28th, 1999 - integrated patches from David Weinehall & Bill Wendling for 2.3 - kernels (isa_...functions). Things are defined in a way that - it still works with 2.0.x 8-) - Dec 30th, 1999 - added handling of the remaining interrupt conditions. That - should cure the spurious hangs. - Jan 30th, 2000 - newer kernels automatically probe more than one board, so the - 'startslot' as a variable is also needed here - June 1st, 2000 - added changes for recent 2.3 kernels - - *************************************************************************/ - -#include <linux/kernel.h> -#include <linux/string.h> -#include <linux/errno.h> -#include <linux/ioport.h> -#include <linux/slab.h> -#include <linux/interrupt.h> -#include <linux/delay.h> -#include <linux/time.h> -#include <linux/mca-legacy.h> -#include <linux/init.h> -#include <linux/module.h> -#include <linux/netdevice.h> -#include <linux/etherdevice.h> -#include <linux/skbuff.h> -#include <linux/bitops.h> - -#include <asm/processor.h> -#include <asm/io.h> - -#define _SK_MCA_DRIVER_ -#include "sk_mca.h" - -/* ------------------------------------------------------------------------ - * global static data - not more since we can handle multiple boards and - * have to pack all state info into the device struct! - * ------------------------------------------------------------------------ */ - -static char *MediaNames[Media_Count] = - { "10Base2", "10BaseT", "10Base5", "Unknown" }; - -static unsigned char poly[] = - { 1, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 0, 0, 0, - 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0 -}; - -/* ------------------------------------------------------------------------ - * private subfunctions - * ------------------------------------------------------------------------ */ - -/* dump parts of shared memory - only needed during debugging */ - -#ifdef DEBUG -static void dumpmem(struct net_device *dev, u32 start, u32 len) -{ - skmca_priv *priv = netdev_priv(dev); - int z; - - for (z = 0; z < len; z++) { - if ((z & 15) == 0) - printk("%04x:", z); - printk(" %02x", readb(priv->base + start + z)); - if ((z & 15) == 15) - printk("\n"); - } -} - -/* print exact time - ditto */ - -static void PrTime(void) -{ - struct timeval tv; - - do_gettimeofday(&tv); - printk("%9d:%06d: ", tv.tv_sec, tv.tv_usec); -} -#endif - -/* deduce resources out of POS registers */ - -static void __init getaddrs(int slot, int junior, int *base, int *irq, - skmca_medium * medium) -{ - u_char pos0, pos1, pos2; - - if (junior) { - pos0 = mca_read_stored_pos(slot, 2); - *base = ((pos0 & 0x0e) << 13) + 0xc0000; - *irq = ((pos0 & 0x10) >> 4) + 10; - *medium = Media_Unknown; - } else { - /* reset POS 104 Bits 0+1 so the shared memory region goes to the - configured area between 640K and 1M. Afterwards, enable the MC2. - I really don't know what rode SK to do this... */ - - mca_write_pos(slot, 4, - mca_read_stored_pos(slot, 4) & 0xfc); - mca_write_pos(slot, 2, - mca_read_stored_pos(slot, 2) | 0x01); - - pos1 = mca_read_stored_pos(slot, 3); - pos2 = mca_read_stored_pos(slot, 4); - *base = ((pos1 & 0x07) << 14) + 0xc0000; - switch (pos2 & 0x0c) { - case 0: - *irq = 3; - break; - case 4: - *irq = 5; - break; - case 8: - *irq = -10; - break; - case 12: - *irq = -11; - break; - } - *medium = (pos2 >> 6) & 3; - } -} - -/* check for both cards: - When the MC2 is turned off, it was configured for more than 15MB RAM, - is disabled and won't get detected using the standard probe. We - therefore have to scan the slots manually :-( */ - -static int __init dofind(int *junior, int firstslot) -{ - int slot; - unsigned int id; - - for (slot = firstslot; slot < MCA_MAX_SLOT_NR; slot++) { - id = mca_read_stored_pos(slot, 0) - + (((unsigned int) mca_read_stored_pos(slot, 1)) << 8); - - *junior = 0; - if (id == SKNET_MCA_ID) - return slot; - *junior = 1; - if (id == SKNET_JUNIOR_MCA_ID) - return slot; - } - return MCA_NOTFOUND; -} - -/* reset the whole board */ - -static void ResetBoard(struct net_device *dev) -{ - skmca_priv *priv = netdev_priv(dev); - - writeb(CTRL_RESET_ON, priv->ctrladdr); - udelay(10); - writeb(CTRL_RESET_OFF, priv->ctrladdr); -} - -/* wait for LANCE interface to become not busy */ - -static int WaitLANCE(struct net_device *dev) -{ - skmca_priv *priv = netdev_priv(dev); - int t = 0; - - while ((readb(priv->ctrladdr) & STAT_IO_BUSY) == - STAT_IO_BUSY) { - udelay(1); - if (++t > 1000) { - printk("%s: LANCE access timeout", dev->name); - return 0; - } - } - - return 1; -} - -/* set LANCE register - must be atomic */ - -static void SetLANCE(struct net_device *dev, u16 addr, u16 value) -{ - skmca_priv *priv = netdev_priv(dev); - unsigned long flags; - - /* disable interrupts */ - - spin_lock_irqsave(&priv->lock, flags); - - /* wait until no transfer is pending */ - - WaitLANCE(dev); - - /* transfer register address to RAP */ - - writeb(CTRL_RESET_OFF | CTRL_RW_WRITE | CTRL_ADR_RAP, priv->ctrladdr); - writew(addr, priv->ioregaddr); - writeb(IOCMD_GO, priv->cmdaddr); - udelay(1); - WaitLANCE(dev); - - /* transfer data to register */ - - writeb(CTRL_RESET_OFF | CTRL_RW_WRITE | CTRL_ADR_DATA, priv->ctrladdr); - writew(value, priv->ioregaddr); - writeb(IOCMD_GO, priv->cmdaddr); - udelay(1); - WaitLANCE(dev); - - /* reenable interrupts */ - - spin_unlock_irqrestore(&priv->lock, flags); -} - -/* get LANCE register */ - -static u16 GetLANCE(struct net_device *dev, u16 addr) -{ - skmca_priv *priv = netdev_priv(dev); - unsigned long flags; - unsigned int res; - - /* disable interrupts */ - - spin_lock_irqsave(&priv->lock, flags); - - /* wait until no transfer is pending */ - - WaitLANCE(dev); - - /* transfer register address to RAP */ - - writeb(CTRL_RESET_OFF | CTRL_RW_WRITE | CTRL_ADR_RAP, priv->ctrladdr); - writew(addr, priv->ioregaddr); - writeb(IOCMD_GO, priv->cmdaddr); - udelay(1); - WaitLANCE(dev); - - /* transfer data from register */ - - writeb(CTRL_RESET_OFF | CTRL_RW_READ | CTRL_ADR_DATA, priv->ctrladdr); - writeb(IOCMD_GO, priv->cmdaddr); - udelay(1); - WaitLANCE(dev); - res = readw(priv->ioregaddr); - - /* reenable interrupts */ - - spin_unlock_irqrestore(&priv->lock, flags); - - return res; -} - -/* build up descriptors in shared RAM */ - -static void InitDscrs(struct net_device *dev) -{ - skmca_priv *priv = netdev_priv(dev); - u32 bufaddr; - - /* Set up Tx descriptors. The board has only 16K RAM so bits 16..23 - are always 0. */ - - bufaddr = RAM_DATABASE; - { - LANCE_TxDescr descr; - int z; - - for (z = 0; z < TXCOUNT; z++) { - descr.LowAddr = bufaddr; - descr.Flags = 0; - descr.Len = 0xf000; - descr.Status = 0; - memcpy_toio(priv->base + RAM_TXBASE + - (z * sizeof(LANCE_TxDescr)), &descr, - sizeof(LANCE_TxDescr)); - memset_io(priv->base + bufaddr, 0, RAM_BUFSIZE); - bufaddr += RAM_BUFSIZE; - } - } - - /* do the same for the Rx descriptors */ - - { - LANCE_RxDescr descr; - int z; - - for (z = 0; z < RXCOUNT; z++) { - descr.LowAddr = bufaddr; - descr.Flags = RXDSCR_FLAGS_OWN; - descr.MaxLen = -RAM_BUFSIZE; - descr.Len = 0; - memcpy_toio(priv->base + RAM_RXBASE + - (z * sizeof(LANCE_RxDescr)), &descr, - sizeof(LANCE_RxDescr)); - memset_io(priv->base + bufaddr, 0, RAM_BUFSIZE); - bufaddr += RAM_BUFSIZE; - } - } -} - -/* calculate the hash bit position for a given multicast address - taken more or less directly from the AMD datasheet... */ - -static void UpdateCRC(unsigned char *CRC, int bit) -{ - int j; - - /* shift CRC one bit */ - - memmove(CRC + 1, CRC, 32 * sizeof(unsigned char)); - CRC[0] = 0; - - /* if bit XOR controlbit = 1, set CRC = CRC XOR polynomial */ - - if (bit ^ CRC[32]) - for (j = 0; j < 32; j++) - CRC[j] ^= poly[j]; -} - -static unsigned int GetHash(char *address) -{ - unsigned char CRC[33]; - int i, byte, hashcode; - - /* a multicast address has bit 0 in the first byte set */ - - if ((address[0] & 1) == 0) - return -1; - - /* initialize CRC */ - - memset(CRC, 1, sizeof(CRC)); - - /* loop through address bits */ - - for (byte = 0; byte < 6; byte++) - for (i = 0; i < 8; i++) - UpdateCRC(CRC, (address[byte] >> i) & 1); - - /* hashcode is the 6 least significant bits of the CRC */ - - hashcode = 0; - for (i = 0; i < 6; i++) - hashcode = (hashcode << 1) + CRC[i]; - return hashcode; -} - -/* feed ready-built initialization block into LANCE */ - -static void InitLANCE(struct net_device *dev) -{ - skmca_priv *priv = netdev_priv(dev); - - /* build up descriptors. */ - - InitDscrs(dev); - - /* next RX descriptor to be read is the first one. Since the LANCE - will start from the beginning after initialization, we have to - reset out pointers too. */ - - priv->nextrx = 0; - - /* no TX descriptors active */ - - priv->nexttxput = priv->nexttxdone = priv->txbusy = 0; - - /* set up the LANCE bus control register - constant for SKnet boards */ - - SetLANCE(dev, LANCE_CSR3, - CSR3_BSWAP_OFF | CSR3_ALE_LOW | CSR3_BCON_HOLD); - - /* write address of initialization block into LANCE */ - - SetLANCE(dev, LANCE_CSR1, RAM_INITBASE & 0xffff); - SetLANCE(dev, LANCE_CSR2, (RAM_INITBASE >> 16) & 0xff); - - /* we don't get ready until the LANCE has read the init block */ - - netif_stop_queue(dev); - - /* let LANCE read the initialization block. LANCE is ready - when we receive the corresponding interrupt. */ - - SetLANCE(dev, LANCE_CSR0, CSR0_INEA | CSR0_INIT); -} - -/* stop the LANCE so we can reinitialize it */ - -static void StopLANCE(struct net_device *dev) -{ - /* can't take frames any more */ - - netif_stop_queue(dev); - - /* disable interrupts, stop it */ - - SetLANCE(dev, LANCE_CSR0, CSR0_STOP); -} - -/* initialize card and LANCE for proper operation */ - -static void InitBoard(struct net_device *dev) -{ - skmca_priv *priv = netdev_priv(dev); - LANCE_InitBlock block; - - /* Lay out the shared RAM - first we create the init block for the LANCE. - We do not overwrite it later because we need it again when we switch - promiscous mode on/off. */ - - block.Mode = 0; - if (dev->flags & IFF_PROMISC) - block.Mode |= LANCE_INIT_PROM; - memcpy(block.PAdr, dev->dev_addr, 6); - memset(block.LAdrF, 0, sizeof(block.LAdrF)); - block.RdrP = (RAM_RXBASE & 0xffffff) | (LRXCOUNT << 29); - block.TdrP = (RAM_TXBASE & 0xffffff) | (LTXCOUNT << 29); - - memcpy_toio(priv->base + RAM_INITBASE, &block, sizeof(block)); - - /* initialize LANCE. Implicitly sets up other structures in RAM. */ - - InitLANCE(dev); -} - -/* deinitialize card and LANCE */ - -static void DeinitBoard(struct net_device *dev) -{ - /* stop LANCE */ - - StopLANCE(dev); - - /* reset board */ - - ResetBoard(dev); -} - -/* probe for device's irq */ - -static int __init ProbeIRQ(struct net_device *dev) -{ - unsigned long imaskval, njiffies, irq; - u16 csr0val; - - /* enable all interrupts */ - - imaskval = probe_irq_on(); - - /* initialize the board. Wait for interrupt 'Initialization done'. */ - - ResetBoard(dev); - InitBoard(dev); - - njiffies = jiffies + HZ; - do { - csr0val = GetLANCE(dev, LANCE_CSR0); - } - while (((csr0val & CSR0_IDON) == 0) && (jiffies != njiffies)); - - /* turn of interrupts again */ - - irq = probe_irq_off(imaskval); - - /* if we found something, ack the interrupt */ - - if (irq) - SetLANCE(dev, LANCE_CSR0, csr0val | CSR0_IDON); - - /* back to idle state */ - - DeinitBoard(dev); - - return irq; -} - -/* ------------------------------------------------------------------------ - * interrupt handler(s) - * ------------------------------------------------------------------------ */ - -/* LANCE has read initialization block -> start it */ - -static u16 irqstart_handler(struct net_device *dev, u16 oldcsr0) -{ - /* now we're ready to transmit */ - - netif_wake_queue(dev); - - /* reset IDON bit, start LANCE */ - - SetLANCE(dev, LANCE_CSR0, oldcsr0 | CSR0_IDON | CSR0_STRT); - return GetLANCE(dev, LANCE_CSR0); -} - -/* did we lose blocks due to a FIFO overrun ? */ - -static u16 irqmiss_handler(struct net_device *dev, u16 oldcsr0) -{ - skmca_priv *priv = netdev_priv(dev); - - /* update statistics */ - - priv->stat.rx_fifo_errors++; - - /* reset MISS bit */ - - SetLANCE(dev, LANCE_CSR0, oldcsr0 | CSR0_MISS); - return GetLANCE(dev, LANCE_CSR0); -} - -/* receive interrupt */ - -static u16 irqrx_handler(struct net_device *dev, u16 oldcsr0) -{ - skmca_priv *priv = netdev_priv(dev); - LANCE_RxDescr descr; - unsigned int descraddr; - - /* run through queue until we reach a descriptor we do not own */ - - descraddr = RAM_RXBASE + (priv->nextrx * sizeof(LANCE_RxDescr)); - while (1) { - /* read descriptor */ - memcpy_fromio(&descr, priv->base + descraddr, - sizeof(LANCE_RxDescr)); - - /* if we reach a descriptor we do not own, we're done */ - if ((descr.Flags & RXDSCR_FLAGS_OWN) != 0) - break; - -#ifdef DEBUG - PrTime(); - printk("Receive packet on descr %d len %d\n", priv->nextrx, - descr.Len); -#endif - - /* erroneous packet ? */ - if ((descr.Flags & RXDSCR_FLAGS_ERR) != 0) { - priv->stat.rx_errors++; - if ((descr.Flags & RXDSCR_FLAGS_CRC) != 0) - priv->stat.rx_crc_errors++; - else if ((descr.Flags & RXDSCR_FLAGS_CRC) != 0) - priv->stat.rx_frame_errors++; - else if ((descr.Flags & RXDSCR_FLAGS_OFLO) != 0) - priv->stat.rx_fifo_errors++; - } - - /* good packet ? */ - else { - struct sk_buff *skb; - - skb = dev_alloc_skb(descr.Len + 2); - if (skb == NULL) - priv->stat.rx_dropped++; - else { - memcpy_fromio(skb_put(skb, descr.Len), - priv->base + - descr.LowAddr, descr.Len); - skb->dev = dev; - skb->protocol = eth_type_trans(skb, dev); - skb->ip_summed = CHECKSUM_NONE; - priv->stat.rx_packets++; - priv->stat.rx_bytes += descr.Len; - netif_rx(skb); - dev->last_rx = jiffies; - } - } - - /* give descriptor back to LANCE */ - descr.Len = 0; - descr.Flags |= RXDSCR_FLAGS_OWN; - - /* update descriptor in shared RAM */ - memcpy_toio(priv->base + descraddr, &descr, - sizeof(LANCE_RxDescr)); - - /* go to next descriptor */ - priv->nextrx++; - descraddr += sizeof(LANCE_RxDescr); - if (priv->nextrx >= RXCOUNT) { - priv->nextrx = 0; - descraddr = RAM_RXBASE; - } - } - - /* reset RINT bit */ - - SetLANCE(dev, LANCE_CSR0, oldcsr0 | CSR0_RINT); - return GetLANCE(dev, LANCE_CSR0); -} - -/* transmit interrupt */ - -static u16 irqtx_handler(struct net_device *dev, u16 oldcsr0) -{ - skmca_priv *priv = netdev_priv(dev); - LANCE_TxDescr descr; - unsigned int descraddr; - - /* check descriptors at most until no busy one is left */ - - descraddr = - RAM_TXBASE + (priv->nexttxdone * sizeof(LANCE_TxDescr)); - while (priv->txbusy > 0) { - /* read descriptor */ - memcpy_fromio(&descr, priv->base + descraddr, - sizeof(LANCE_TxDescr)); - - /* if the LANCE still owns this one, we've worked out all sent packets */ - if ((descr.Flags & TXDSCR_FLAGS_OWN) != 0) - break; - -#ifdef DEBUG - PrTime(); - printk("Send packet done on descr %d\n", priv->nexttxdone); -#endif - - /* update statistics */ - if ((descr.Flags & TXDSCR_FLAGS_ERR) == 0) { - priv->stat.tx_packets++; - priv->stat.tx_bytes++; - } else { - priv->stat.tx_errors++; - if ((descr.Status & TXDSCR_STATUS_UFLO) != 0) { - priv->stat.tx_fifo_errors++; - InitLANCE(dev); - } - else - if ((descr.Status & TXDSCR_STATUS_LCOL) != - 0) priv->stat.tx_window_errors++; - else if ((descr.Status & TXDSCR_STATUS_LCAR) != 0) - priv->stat.tx_carrier_errors++; - else if ((descr.Status & TXDSCR_STATUS_RTRY) != 0) - priv->stat.tx_aborted_errors++; - } - - /* go to next descriptor */ - priv->nexttxdone++; - descraddr += sizeof(LANCE_TxDescr); - if (priv->nexttxdone >= TXCOUNT) { - priv->nexttxdone = 0; - descraddr = RAM_TXBASE; - } - priv->txbusy--; - } - - /* reset TX interrupt bit */ - - SetLANCE(dev, LANCE_CSR0, oldcsr0 | CSR0_TINT); - oldcsr0 = GetLANCE(dev, LANCE_CSR0); - - /* at least one descriptor is freed. Therefore we can accept - a new one */ - /* inform upper layers we're in business again */ - - netif_wake_queue(dev); - - return oldcsr0; -} - -/* general interrupt entry */ - -static irqreturn_t irq_handler(int irq, void *device) -{ - struct net_device *dev = (struct net_device *) device; - u16 csr0val; - - /* read CSR0 to get interrupt cause */ - - csr0val = GetLANCE(dev, LANCE_CSR0); - - /* in case we're not meant... */ - - if ((csr0val & CSR0_INTR) == 0) - return IRQ_NONE; - -#if 0 - set_bit(LINK_STATE_RXSEM, &dev->state); -#endif - - /* loop through the interrupt bits until everything is clear */ - - do { - if ((csr0val & CSR0_IDON) != 0) - csr0val = irqstart_handler(dev, csr0val); - if ((csr0val & CSR0_RINT) != 0) - csr0val = irqrx_handler(dev, csr0val); - if ((csr0val & CSR0_MISS) != 0) - csr0val = irqmiss_handler(dev, csr0val); - if ((csr0val & CSR0_TINT) != 0) - csr0val = irqtx_handler(dev, csr0val); - if ((csr0val & CSR0_MERR) != 0) { - SetLANCE(dev, LANCE_CSR0, csr0val | CSR0_MERR); - csr0val = GetLANCE(dev, LANCE_CSR0); - } - if ((csr0val & CSR0_BABL) != 0) { - SetLANCE(dev, LANCE_CSR0, csr0val | CSR0_BABL); - csr0val = GetLANCE(dev, LANCE_CSR0); - } - } - while ((csr0val & CSR0_INTR) != 0); - -#if 0 - clear_bit(LINK_STATE_RXSEM, &dev->state); -#endif - return IRQ_HANDLED; -} - -/* ------------------------------------------------------------------------ - * driver methods - * ------------------------------------------------------------------------ */ - -/* MCA info */ - -static int skmca_getinfo(char *buf, int slot, void *d) -{ - int len = 0, i; - struct net_device *dev = (struct net_device *) d; - skmca_priv *priv; - - /* can't say anything about an uninitialized device... */ - - if (dev == NULL) - return len; - priv = netdev_priv(dev); - - /* print info */ - - len += sprintf(buf + len, "IRQ: %d\n", priv->realirq); - len += sprintf(buf + len, "Memory: %#lx-%#lx\n", dev->mem_start, - dev->mem_end - 1); - len += - sprintf(buf + len, "Transceiver: %s\n", - MediaNames[priv->medium]); - len += sprintf(buf + len, "Device: %s\n", dev->name); - len += sprintf(buf + len, "MAC address:"); - for (i = 0; i < 6; i++) - len += sprintf(buf + len, " %02x", dev->dev_addr[i]); - buf[len++] = '\n'; - buf[len] = 0; - - return len; -} - -/* open driver. Means also initialization and start of LANCE */ - -static int skmca_open(struct net_device *dev) -{ - int result; - skmca_priv *priv = netdev_priv(dev); - - /* register resources - only necessary for IRQ */ - result = - request_irq(priv->realirq, irq_handler, - IRQF_SHARED | IRQF_SAMPLE_RANDOM, "sk_mca", dev); - if (result != 0) { - printk("%s: failed to register irq %d\n", dev->name, - dev->irq); - return result; - } - dev->irq = priv->realirq; - - /* set up the card and LANCE */ - - InitBoard(dev); - - /* set up flags */ - - netif_start_queue(dev); - - return 0; -} - -/* close driver. Shut down board and free allocated resources */ - -static int skmca_close(struct net_device *dev) -{ - /* turn off board */ - DeinitBoard(dev); - - /* release resources */ - if (dev->irq != 0) - free_irq(dev->irq, dev); - dev->irq = 0; - - return 0; -} - -/* transmit a block. */ - -static int skmca_tx(struct sk_buff *skb, struct net_device *dev) -{ - skmca_priv *priv = netdev_priv(dev); - LANCE_TxDescr descr; - unsigned int address; - int tmplen, retval = 0; - unsigned long flags; - - /* if we get called with a NULL descriptor, the Ethernet layer thinks - our card is stuck an we should reset it. We'll do this completely: */ - - if (skb == NULL) { - DeinitBoard(dev); - InitBoard(dev); - return 0; /* don't try to free the block here ;-) */ - } - - /* is there space in the Tx queue ? If no, the upper layer gave us a - packet in spite of us not being ready and is really in trouble. - We'll do the dropping for him: */ - if (priv->txbusy >= TXCOUNT) { - priv->stat.tx_dropped++; - retval = -EIO; - goto tx_done; - } - - /* get TX descriptor */ - address = RAM_TXBASE + (priv->nexttxput * sizeof(LANCE_TxDescr)); - memcpy_fromio(&descr, priv->base + address, sizeof(LANCE_TxDescr)); - - /* enter packet length as 2s complement - assure minimum length */ - tmplen = skb->len; - if (tmplen < 60) - tmplen = 60; - descr.Len = 65536 - tmplen; - - /* copy filler into RAM - in case we're filling up... - we're filling a bit more than necessary, but that doesn't harm - since the buffer is far larger... */ - if (tmplen > skb->len) { - char *fill = "NetBSD is a nice OS too! "; - unsigned int destoffs = 0, l = strlen(fill); - - while (destoffs < tmplen) { - memcpy_toio(priv->base + descr.LowAddr + - destoffs, fill, l); - destoffs += l; - } - } - - /* do the real data copying */ - memcpy_toio(priv->base + descr.LowAddr, skb->data, skb->len); - - /* hand descriptor over to LANCE - this is the first and last chunk */ - descr.Flags = - TXDSCR_FLAGS_OWN | TXDSCR_FLAGS_STP | TXDSCR_FLAGS_ENP; - -#ifdef DEBUG - PrTime(); - printk("Send packet on descr %d len %d\n", priv->nexttxput, - skb->len); -#endif - - /* one more descriptor busy */ - - spin_lock_irqsave(&priv->lock, flags); - - priv->nexttxput++; - if (priv->nexttxput >= TXCOUNT) - priv->nexttxput = 0; - priv->txbusy++; - - /* are we saturated ? */ - - if (priv->txbusy >= TXCOUNT) - netif_stop_queue(dev); - - /* write descriptor back to RAM */ - memcpy_toio(priv->base + address, &descr, sizeof(LANCE_TxDescr)); - - /* if no descriptors were active, give the LANCE a hint to read it - immediately */ - - if (priv->txbusy == 0) - SetLANCE(dev, LANCE_CSR0, CSR0_INEA | CSR0_TDMD); - - spin_unlock_irqrestore(&priv->lock, flags); - - tx_done: - - dev_kfree_skb(skb); - - return retval; -} - -/* return pointer to Ethernet statistics */ - -static struct net_device_stats *skmca_stats(struct net_device *dev) -{ - skmca_priv *priv = netdev_priv(dev); - - return &(priv->stat); -} - -/* switch receiver mode. We use the LANCE's multicast filter to prefilter - multicast addresses. */ - -static void skmca_set_multicast_list(struct net_device *dev) -{ - skmca_priv *priv = netdev_priv(dev); - LANCE_InitBlock block; - - /* first stop the LANCE... */ - StopLANCE(dev); - - /* ...then modify the initialization block... */ - memcpy_fromio(&block, priv->base + RAM_INITBASE, sizeof(block)); - if (dev->flags & IFF_PROMISC) - block.Mode |= LANCE_INIT_PROM; - else - block.Mode &= ~LANCE_INIT_PROM; - - if (dev->flags & IFF_ALLMULTI) { /* get all multicasts */ - memset(block.LAdrF, 0xff, sizeof(block.LAdrF)); - } else { /* get selected/no multicasts */ - - struct dev_mc_list *mptr; - int code; - - memset(block.LAdrF, 0, sizeof(block.LAdrF)); - for (mptr = dev->mc_list; mptr != NULL; mptr = mptr->next) { - code = GetHash(mptr->dmi_addr); - block.LAdrF[(code >> 3) & 7] |= 1 << (code & 7); - } - } - - memcpy_toio(priv->base + RAM_INITBASE, &block, sizeof(block)); - - /* ...then reinit LANCE with the correct flags */ - InitLANCE(dev); -} - -/* ------------------------------------------------------------------------ - * hardware check - * ------------------------------------------------------------------------ */ - -static int startslot; /* counts through slots when probing multiple devices */ - -static void cleanup_card(struct net_device *dev) -{ - skmca_priv *priv = netdev_priv(dev); - DeinitBoard(dev); - if (dev->irq != 0) - free_irq(dev->irq, dev); - iounmap(priv->base); - mca_mark_as_unused(priv->slot); - mca_set_adapter_procfn(priv->slot, NULL, NULL); -} - -struct net_device * __init skmca_probe(int unit) -{ - struct net_device *dev; - int force_detect = 0; - int junior, slot, i; - int base = 0, irq = 0; - skmca_priv *priv; - skmca_medium medium; - int err; - - /* can't work without an MCA bus ;-) */ - - if (MCA_bus == 0) - return ERR_PTR(-ENODEV); - - dev = alloc_etherdev(sizeof(skmca_priv)); - if (!dev) - return ERR_PTR(-ENOMEM); - - if (unit >= 0) { - sprintf(dev->name, "eth%d", unit); - netdev_boot_setup_check(dev); - } - - SET_MODULE_OWNER(dev); - - /* start address of 1 --> forced detection */ - - if (dev->mem_start == 1) - force_detect = 1; - - /* search through slots */ - - base = dev->mem_start; - irq = dev->base_addr; - for (slot = startslot; (slot = dofind(&junior, slot)) != -1; slot++) { - /* deduce card addresses */ - - getaddrs(slot, junior, &base, &irq, &medium); - - /* slot already in use ? */ - - if (mca_is_adapter_used(slot)) - continue; - - /* were we looking for something different ? */ - - if (dev->irq && dev->irq != irq) - continue; - if (dev->mem_start && dev->mem_start != base) - continue; - - /* found something that matches */ - - break; - } - - /* nothing found ? */ - - if (slot == -1) { - free_netdev(dev); - return (base || irq) ? ERR_PTR(-ENXIO) : ERR_PTR(-ENODEV); - } - - /* make procfs entries */ - - if (junior) - mca_set_adapter_name(slot, - "SKNET junior MC2 Ethernet Adapter"); - else - mca_set_adapter_name(slot, "SKNET MC2+ Ethernet Adapter"); - mca_set_adapter_procfn(slot, (MCA_ProcFn) skmca_getinfo, dev); - - mca_mark_as_used(slot); - - /* announce success */ - printk("%s: SKNet %s adapter found in slot %d\n", dev->name, - junior ? "Junior MC2" : "MC2+", slot + 1); - - priv = netdev_priv(dev); - priv->base = ioremap(base, 0x4000); - if (!priv->base) { - mca_set_adapter_procfn(slot, NULL, NULL); - mca_mark_as_unused(slot); - free_netdev(dev); - return ERR_PTR(-ENOMEM); - } - - priv->slot = slot; - priv->macbase = priv->base + 0x3fc0; - priv->ioregaddr = priv->base + 0x3ff0; - priv->ctrladdr = priv->base + 0x3ff2; - priv->cmdaddr = priv->base + 0x3ff3; - priv->medium = medium; - memset(&priv->stat, 0, sizeof(struct net_device_stats)); - spin_lock_init(&priv->lock); - - /* set base + irq for this device (irq not allocated so far) */ - dev->irq = 0; - dev->mem_start = base; - dev->mem_end = base + 0x4000; - - /* autoprobe ? */ - if (irq < 0) { - int nirq; - - printk - ("%s: ambigous POS bit combination, must probe for IRQ...\n", - dev->name); - nirq = ProbeIRQ(dev); - if (nirq <= 0) - printk("%s: IRQ probe failed, assuming IRQ %d", - dev->name, priv->realirq = -irq); - else - priv->realirq = nirq; - } else - priv->realirq = irq; - - /* set methods */ - dev->open = skmca_open; - dev->stop = skmca_close; - dev->hard_start_xmit = skmca_tx; - dev->do_ioctl = NULL; - dev->get_stats = skmca_stats; - dev->set_multicast_list = skmca_set_multicast_list; - dev->flags |= IFF_MULTICAST; - - /* copy out MAC address */ - for (i = 0; i < 6; i++) - dev->dev_addr[i] = readb(priv->macbase + (i << 1)); - - /* print config */ - printk("%s: IRQ %d, memory %#lx-%#lx, " - "MAC address %02x:%02x:%02x:%02x:%02x:%02x.\n", - dev->name, priv->realirq, dev->mem_start, dev->mem_end - 1, - 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: %s medium\n", dev->name, MediaNames[priv->medium]); - - /* reset board */ - - ResetBoard(dev); - - startslot = slot + 1; - - err = register_netdev(dev); - if (err) { - cleanup_card(dev); - free_netdev(dev); - dev = ERR_PTR(err); - } - return dev; -} - -/* ------------------------------------------------------------------------ - * modularization support - * ------------------------------------------------------------------------ */ - -#ifdef MODULE -MODULE_LICENSE("GPL"); - -#define DEVMAX 5 - -static struct net_device *moddevs[DEVMAX]; - -int init_module(void) -{ - int z; - - startslot = 0; - for (z = 0; z < DEVMAX; z++) { - struct net_device *dev = skmca_probe(-1); - if (IS_ERR(dev)) - break; - moddevs[z] = dev; - } - if (!z) - return -EIO; - return 0; -} - -void cleanup_module(void) -{ - int z; - - for (z = 0; z < DEVMAX; z++) { - struct net_device *dev = moddevs[z]; - if (dev) { - unregister_netdev(dev); - cleanup_card(dev); - free_netdev(dev); - } - } -} -#endif /* MODULE */ |
