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432 lines
9.5 KiB
432 lines
9.5 KiB
/*
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* skisa.c: A network driver for SK-NET TMS380-based ISA token ring cards.
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*
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* Based on tmspci written 1999 by Adam Fritzler
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*
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* Written 2000 by Jochen Friedrich
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* Dedicated to my girlfriend Steffi Bopp
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*
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* This software may be used and distributed according to the terms
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* of the GNU General Public License, incorporated herein by reference.
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*
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* This driver module supports the following cards:
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* - SysKonnect TR4/16(+) ISA (SK-4190)
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*
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* Maintainer(s):
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* AF Adam Fritzler mid@auk.cx
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* JF Jochen Friedrich jochen@scram.de
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*
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* Modification History:
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* 14-Jan-01 JF Created
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* 28-Oct-02 JF Fixed probe of card for static compilation.
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* Fixed module init to not make hotplug go wild.
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* 09-Nov-02 JF Fixed early bail out on out of memory
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* situations if multiple cards are found.
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* Cleaned up some unnecessary console SPAM.
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* 09-Dec-02 JF Fixed module reference counting.
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* 02-Jan-03 JF Renamed to skisa.c
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*
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*/
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static const char version[] = "skisa.c: v1.03 09/12/2002 by Jochen Friedrich\n";
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <linux/netdevice.h>
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#include <linux/trdevice.h>
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#include <linux/platform_device.h>
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#include <asm/system.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/pci.h>
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#include <asm/dma.h>
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#include "tms380tr.h"
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#define SK_ISA_IO_EXTENT 32
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/* A zero-terminated list of I/O addresses to be probed. */
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static unsigned int portlist[] __initdata = {
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0x0A20, 0x1A20, 0x0B20, 0x1B20, 0x0980, 0x1980, 0x0900, 0x1900,// SK
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0
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};
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/* A zero-terminated list of IRQs to be probed.
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* Used again after initial probe for sktr_chipset_init, called from sktr_open.
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*/
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static const unsigned short irqlist[] = {
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3, 5, 9, 10, 11, 12, 15,
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0
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};
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/* A zero-terminated list of DMAs to be probed. */
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static int dmalist[] __initdata = {
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5, 6, 7,
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0
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};
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static char isa_cardname[] = "SK NET TR 4/16 ISA\0";
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static u64 dma_mask = ISA_MAX_ADDRESS;
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static int sk_isa_open(struct net_device *dev);
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static void sk_isa_read_eeprom(struct net_device *dev);
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static unsigned short sk_isa_setnselout_pins(struct net_device *dev);
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static unsigned short sk_isa_sifreadb(struct net_device *dev, unsigned short reg)
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{
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return inb(dev->base_addr + reg);
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}
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static unsigned short sk_isa_sifreadw(struct net_device *dev, unsigned short reg)
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{
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return inw(dev->base_addr + reg);
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}
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static void sk_isa_sifwriteb(struct net_device *dev, unsigned short val, unsigned short reg)
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{
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outb(val, dev->base_addr + reg);
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}
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static void sk_isa_sifwritew(struct net_device *dev, unsigned short val, unsigned short reg)
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{
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outw(val, dev->base_addr + reg);
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}
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static int __init sk_isa_probe1(struct net_device *dev, int ioaddr)
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{
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unsigned char old, chk1, chk2;
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if (!request_region(ioaddr, SK_ISA_IO_EXTENT, isa_cardname))
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return -ENODEV;
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old = inb(ioaddr + SIFADR); /* Get the old SIFADR value */
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chk1 = 0; /* Begin with check value 0 */
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do {
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/* Write new SIFADR value */
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outb(chk1, ioaddr + SIFADR);
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/* Read, invert and write */
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chk2 = inb(ioaddr + SIFADD);
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chk2 ^= 0x0FE;
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outb(chk2, ioaddr + SIFADR);
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/* Read, invert and compare */
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chk2 = inb(ioaddr + SIFADD);
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chk2 ^= 0x0FE;
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if(chk1 != chk2) {
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release_region(ioaddr, SK_ISA_IO_EXTENT);
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return -ENODEV;
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}
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chk1 -= 2;
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} while(chk1 != 0); /* Repeat 128 times (all byte values) */
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/* Restore the SIFADR value */
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outb(old, ioaddr + SIFADR);
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dev->base_addr = ioaddr;
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return 0;
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}
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static int __init setup_card(struct net_device *dev, struct device *pdev)
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{
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struct net_local *tp;
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static int versionprinted;
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const unsigned *port;
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int j, err = 0;
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if (!dev)
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return -ENOMEM;
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SET_MODULE_OWNER(dev);
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if (dev->base_addr) /* probe specific location */
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err = sk_isa_probe1(dev, dev->base_addr);
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else {
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for (port = portlist; *port; port++) {
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err = sk_isa_probe1(dev, *port);
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if (!err)
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break;
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}
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}
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if (err)
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goto out5;
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/* At this point we have found a valid card. */
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if (versionprinted++ == 0)
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printk(KERN_DEBUG "%s", version);
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err = -EIO;
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pdev->dma_mask = &dma_mask;
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if (tmsdev_init(dev, pdev))
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goto out4;
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dev->base_addr &= ~3;
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sk_isa_read_eeprom(dev);
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printk(KERN_DEBUG "skisa.c: Ring Station Address: ");
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printk("%2.2x", dev->dev_addr[0]);
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for (j = 1; j < 6; j++)
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printk(":%2.2x", dev->dev_addr[j]);
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printk("\n");
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tp = netdev_priv(dev);
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tp->setnselout = sk_isa_setnselout_pins;
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tp->sifreadb = sk_isa_sifreadb;
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tp->sifreadw = sk_isa_sifreadw;
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tp->sifwriteb = sk_isa_sifwriteb;
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tp->sifwritew = sk_isa_sifwritew;
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memcpy(tp->ProductID, isa_cardname, PROD_ID_SIZE + 1);
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tp->tmspriv = NULL;
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dev->open = sk_isa_open;
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dev->stop = tms380tr_close;
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if (dev->irq == 0)
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{
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for(j = 0; irqlist[j] != 0; j++)
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{
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dev->irq = irqlist[j];
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if (!request_irq(dev->irq, tms380tr_interrupt, 0,
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isa_cardname, dev))
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break;
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}
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if(irqlist[j] == 0)
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{
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printk(KERN_INFO "skisa.c: AutoSelect no IRQ available\n");
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goto out3;
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}
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}
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else
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{
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for(j = 0; irqlist[j] != 0; j++)
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if (irqlist[j] == dev->irq)
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break;
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if (irqlist[j] == 0)
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{
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printk(KERN_INFO "skisa.c: Illegal IRQ %d specified\n",
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dev->irq);
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goto out3;
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}
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if (request_irq(dev->irq, tms380tr_interrupt, 0,
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isa_cardname, dev))
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{
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printk(KERN_INFO "skisa.c: Selected IRQ %d not available\n",
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dev->irq);
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goto out3;
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}
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}
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if (dev->dma == 0)
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{
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for(j = 0; dmalist[j] != 0; j++)
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{
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dev->dma = dmalist[j];
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if (!request_dma(dev->dma, isa_cardname))
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break;
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}
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if(dmalist[j] == 0)
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{
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printk(KERN_INFO "skisa.c: AutoSelect no DMA available\n");
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goto out2;
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}
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}
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else
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{
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for(j = 0; dmalist[j] != 0; j++)
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if (dmalist[j] == dev->dma)
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break;
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if (dmalist[j] == 0)
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{
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printk(KERN_INFO "skisa.c: Illegal DMA %d specified\n",
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dev->dma);
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goto out2;
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}
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if (request_dma(dev->dma, isa_cardname))
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{
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printk(KERN_INFO "skisa.c: Selected DMA %d not available\n",
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dev->dma);
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goto out2;
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}
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}
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err = register_netdev(dev);
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if (err)
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goto out;
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printk(KERN_DEBUG "%s: IO: %#4lx IRQ: %d DMA: %d\n",
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dev->name, dev->base_addr, dev->irq, dev->dma);
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return 0;
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out:
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free_dma(dev->dma);
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out2:
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free_irq(dev->irq, dev);
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out3:
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tmsdev_term(dev);
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out4:
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release_region(dev->base_addr, SK_ISA_IO_EXTENT);
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out5:
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return err;
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}
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/*
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* Reads MAC address from adapter RAM, which should've read it from
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* the onboard ROM.
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*
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* Calling this on a board that does not support it can be a very
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* dangerous thing. The Madge board, for instance, will lock your
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* machine hard when this is called. Luckily, its supported in a
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* separate driver. --ASF
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*/
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static void sk_isa_read_eeprom(struct net_device *dev)
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{
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int i;
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/* Address: 0000:0000 */
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sk_isa_sifwritew(dev, 0, SIFADX);
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sk_isa_sifwritew(dev, 0, SIFADR);
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/* Read six byte MAC address data */
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dev->addr_len = 6;
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for(i = 0; i < 6; i++)
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dev->dev_addr[i] = sk_isa_sifreadw(dev, SIFINC) >> 8;
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}
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unsigned short sk_isa_setnselout_pins(struct net_device *dev)
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{
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return 0;
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}
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static int sk_isa_open(struct net_device *dev)
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{
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struct net_local *tp = netdev_priv(dev);
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unsigned short val = 0;
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unsigned short oldval;
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int i;
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val = 0;
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for(i = 0; irqlist[i] != 0; i++)
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{
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if(irqlist[i] == dev->irq)
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break;
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}
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val |= CYCLE_TIME << 2;
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val |= i << 4;
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i = dev->dma - 5;
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val |= i;
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if(tp->DataRate == SPEED_4)
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val |= LINE_SPEED_BIT;
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else
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val &= ~LINE_SPEED_BIT;
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oldval = sk_isa_sifreadb(dev, POSREG);
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/* Leave cycle bits alone */
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oldval |= 0xf3;
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val &= oldval;
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sk_isa_sifwriteb(dev, val, POSREG);
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return tms380tr_open(dev);
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}
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#define ISATR_MAX_ADAPTERS 3
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static int io[ISATR_MAX_ADAPTERS];
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static int irq[ISATR_MAX_ADAPTERS];
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static int dma[ISATR_MAX_ADAPTERS];
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MODULE_LICENSE("GPL");
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module_param_array(io, int, NULL, 0);
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module_param_array(irq, int, NULL, 0);
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module_param_array(dma, int, NULL, 0);
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static struct platform_device *sk_isa_dev[ISATR_MAX_ADAPTERS];
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static struct platform_driver sk_isa_driver = {
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.driver = {
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.name = "skisa",
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},
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};
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static int __init sk_isa_init(void)
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{
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struct net_device *dev;
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struct platform_device *pdev;
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int i, num = 0, err = 0;
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err = platform_driver_register(&sk_isa_driver);
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if (err)
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return err;
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for (i = 0; i < ISATR_MAX_ADAPTERS ; i++) {
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dev = alloc_trdev(sizeof(struct net_local));
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if (!dev)
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continue;
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dev->base_addr = io[i];
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dev->irq = irq[i];
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dev->dma = dma[i];
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pdev = platform_device_register_simple("skisa",
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i, NULL, 0);
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if (IS_ERR(pdev)) {
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free_netdev(dev);
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continue;
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}
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err = setup_card(dev, &pdev->dev);
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if (!err) {
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sk_isa_dev[i] = pdev;
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platform_set_drvdata(sk_isa_dev[i], dev);
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++num;
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} else {
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platform_device_unregister(pdev);
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free_netdev(dev);
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}
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}
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printk(KERN_NOTICE "skisa.c: %d cards found.\n", num);
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/* Probe for cards. */
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if (num == 0) {
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printk(KERN_NOTICE "skisa.c: No cards found.\n");
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platform_driver_unregister(&sk_isa_driver);
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return -ENODEV;
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}
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return 0;
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}
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static void __exit sk_isa_cleanup(void)
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{
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struct net_device *dev;
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int i;
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for (i = 0; i < ISATR_MAX_ADAPTERS ; i++) {
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struct platform_device *pdev = sk_isa_dev[i];
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if (!pdev)
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continue;
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dev = platform_get_drvdata(pdev);
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unregister_netdev(dev);
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release_region(dev->base_addr, SK_ISA_IO_EXTENT);
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free_irq(dev->irq, dev);
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free_dma(dev->dma);
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tmsdev_term(dev);
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free_netdev(dev);
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platform_set_drvdata(pdev, NULL);
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platform_device_unregister(pdev);
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}
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platform_driver_unregister(&sk_isa_driver);
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}
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module_init(sk_isa_init);
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module_exit(sk_isa_cleanup);
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