/*
* abyss.c: Network driver for the Madge Smart 16/4 PCI Mk2 token ring card.
*
* Written 1999-2000 by Adam Fritzler
*
* This software may be used and distributed according to the terms
* of the GNU General Public License, incorporated herein by reference.
*
* This driver module supports the following cards:
* - Madge Smart 16/4 PCI Mk2
*
* Maintainer(s):
* AF Adam Fritzler
*
* Modification History:
* 30-Dec-99 AF Split off from the tms380tr driver.
* 22-Jan-00 AF Updated to use indirect read/writes
* 23-Nov-00 JG New PCI API, cleanups
*
*
* TODO:
* 1. See if we can use MMIO instead of inb/outb/inw/outw
* 2. Add support for Mk1 (has AT24 attached to the PCI
* config registers)
*
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/trdevice.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/irq.h>
#include "tms380tr.h"
#include "abyss.h" /* Madge-specific constants */
static char version[] __devinitdata =
"abyss.c: v1.02 23/11/2000 by Adam Fritzler\n";
#define ABYSS_IO_EXTENT 64
static DEFINE_PCI_DEVICE_TABLE(abyss_pci_tbl) = {
{ PCI_VENDOR_ID_MADGE, PCI_DEVICE_ID_MADGE_MK2,
PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_NETWORK_TOKEN_RING << 8, 0x00ffffff, },
{ } /* Terminating entry */
};
MODULE_DEVICE_TABLE(pci, abyss_pci_tbl);
MODULE_LICENSE("GPL");
static int abyss_open(struct net_device *dev);
static int abyss_close(struct net_device *dev);
static void abyss_enable(struct net_device *dev);
static int abyss_chipset_init(struct net_device *dev);
static void abyss_read_eeprom(struct net_device *dev);
static unsigned short abyss_setnselout_pins(struct net_device *dev);
static void at24_writedatabyte(unsigned long regaddr, unsigned char byte);
static int at24_sendfullcmd(unsigned long regaddr, unsigned char cmd, unsigned char addr);
static int at24_sendcmd(unsigned long regaddr, unsigned char cmd);
static unsigned char at24_readdatabit(unsigned long regaddr);
static unsigned char at24_readdatabyte(unsigned long regaddr);
static int at24_waitforack(unsigned long regaddr);
static int at24_waitfornack(unsigned long regaddr);
static void at24_setlines(unsigned long regaddr, unsigned char clock, unsigned char data);
static void at24_start(unsigned long regaddr);
static unsigned char at24_readb(unsigned long regaddr, unsigned char addr);
static unsigned short abyss_sifreadb(struct net_device *dev, unsigned short reg)
{
return inb(dev->base_addr + reg);
}
static unsigned short abyss_sifreadw(struct net_device *dev, unsigned short reg)
{
return inw(dev->base_addr + reg);
}
static void abyss_sifwriteb(struct net_device *dev, unsigned short val, unsigned short reg)
{
outb(val, dev->base_addr + reg);
}
static void abyss_sifwritew(struct net_device *dev, unsigned short val, unsigned short reg)
{
outw(val, dev->base_addr + reg);
}
static struct net_device_ops abyss_netdev_ops;
static int __devinit abyss_attach(struct pci_dev *pdev, const struct pci_device_id *ent)
{
static int versionprinted;
struct net_device *dev;
struct net_local *tp;
int ret, pci_irq_line;
unsigned long pci_ioaddr;
if (versionprinted++ == 0)
printk("%s", version);
if (pci_enable_device(pdev))
return -EIO;
/* Remove I/O space marker in bit 0. */
pci_irq_line = pdev->irq;
pci_ioaddr = pci_resource_start (pdev, 0);
/* At this point we have found a valid card. */
dev = alloc_trdev(sizeof(struct net_local));
if (!dev)
return -ENOMEM;
if (!request_region(pci_ioaddr, ABYSS_IO_EXTENT, dev->name)) {
ret = -EBUSY;
goto err_out_trdev;
}
ret = request_irq(pdev->irq, tms380tr_interrupt, IRQF_SHARED,
dev->name, dev);
if (ret)
goto err_out_region;
dev->base_addr = pci_ioaddr;
dev->irq = pci_irq_line;
printk("%s: Madge Smart 16/4 PCI Mk2 (Abyss)\n", dev->name);
printk("%s: IO: %#4lx IRQ: %d\n",
dev->name, pci_ioaddr, dev->irq);
/*
* The TMS SIF registers lay 0x10 above the card base address.
*/
dev->base_addr += 0x10;
ret = tmsdev_init(dev, &pdev->dev);
if (ret) {
printk("%s: unable to get memory for dev->priv.\n",
dev->name);
goto err_out_irq;
}
abyss_read_eeprom(dev);
printk("%s: Ring Station Address: %pM\n", dev->name, dev->dev_addr);
tp = netdev_priv(dev);
tp->setnselout = abyss_setnselout_pins;
tp->sifreadb = abyss_sifreadb;
tp->sifreadw = abyss_sifreadw;
tp->sifwriteb = abyss_sifwriteb;
tp->sifwritew = abyss_sifwritew;
memcpy(tp->ProductID, "Madge PCI 16/4 Mk2", PROD_ID_SIZE + 1);
dev->netdev_ops = &abyss_netdev_ops;
pci_set_drvdata(pdev, dev);
SET_NETDEV_DEV(dev, &pdev->dev);
ret = register_netdev(dev);
if (ret)
goto err_out_tmsdev;
return 0;
err_out_tmsdev:
pci_set_drvdata(pdev, NULL);
tmsdev_term(dev);
err_out_irq:
free_irq(pdev->irq, dev);
err_out_region:
release_region(pci_ioaddr, ABYSS_IO_EXTENT);
err_out_trdev:
free_netdev(dev);
return ret;
}
static unsigned short abyss_setnselout_pins(struct net_device *dev)
{
unsigned short val = 0;
struct net_local *tp = netdev_priv(dev);
if(tp->DataRate == SPEED_4)
val |= 0x01; /* Set 4Mbps */
else
val |= 0x00; /* Set 16Mbps */
return val;
}
/*
* The following Madge boards should use this code:
* - Smart 16/4 PCI Mk2 (Abyss)
* - Smart 16/4 PCI Mk1 (PCI T)
* - Smart 16/4 Client Plus PnP (Big Apple)
* - Smart 16/4 Cardbus Mk2
*
* These access an Atmel AT24 SEEPROM using their glue chip registers.
*
*/
static void at24_writedatabyte(unsigned long regaddr, unsigned char byte)
{
int i;
for (i = 0; i < 8; i++) {
at24_setlines(regaddr, 0, (byte >> (7-i))&0x01);
at24_setlines(regaddr, 1, (byte >> (7-i))&0x01);
at24_setlines(regaddr, 0, (byte >> (7-i))&0x01);
}
}
static int at24_sendfullcmd(unsigned long regaddr, unsigned char cmd, unsigned char addr)
{
if (at24_sendcmd(regaddr, cmd)) {
at24_writedatabyte(regaddr, addr);
return at24_waitforack(regaddr);
}
return 0;
}
static int at24_sendcmd(unsigned long regaddr, unsigned char cmd)
{
int i;
for (i = 0; i < 10; i++) {
at24_start(regaddr);
at24_writedatabyte(regaddr, cmd);
if (at24_waitforack(regaddr))
return 1;
}
return 0;
}
static unsigned char at24_readdatabit(unsigned long regaddr)
{
unsigned char val;
at24_setlines(regaddr, 0, 1);
at24_setlines(regaddr, 1, 1);
val = (inb(regaddr) & AT24_DATA)?1:0;
at24_setlines(regaddr, 1, 1);
at24_setlines(regaddr, 0, 1);
return val;
}
static unsigned char at24_readdatabyte(unsigned long regaddr)
{
unsigned char data = 0;
int i;
for (i = 0; i < 8; i++) {
data <<= 1;
data |= at24_readdatabit(regaddr);
}
return data;
}
static int at24_waitforack(unsigned long regaddr)
{
int i;
for (i = 0; i < 10; i++) {
if ((at24_readdatabit(regaddr) & 0x01) == 0x00)
return 1;
}
return 0;
}
static int at24_waitfornack(unsigned long regaddr)
{
int i;
for (i = 0; i < 10; i++) {
if ((at24_readdatabit(regaddr) & 0x01) == 0x01)
return 1;
}
return 0;
}
static void at24_setlines(unsigned long regaddr, unsigned char clock, unsigned char data)
{
unsigned char val = AT24_ENABLE;
if (clock)
val |= AT24_CLOCK;
if (data)
val |= AT24_DATA;
outb(val, regaddr);
tms380tr_wait(20); /* Very necessary. */
}
static void at24_start(unsigned long regaddr)
{
at24_setlines(regaddr, 0, 1);
at24_setlines(regaddr, 1, 1);
at24_setlines(regaddr, 1, 0);
at24_setlines(regaddr, 0, 1);
}
static unsigned char at24_readb(unsigned long regaddr, unsigned char addr)
{
unsigned char data = 0xff;
if (at24_sendfullcmd(regaddr, AT24_WRITE, addr)) {
if (at24_sendcmd(regaddr, AT24_READ)) {
data = at24_readdatabyte(regaddr);
if (!at24_waitfornack(regaddr))
data = 0xff;
}
}
return data;
}
/*
* Enable basic functions of the Madge chipset needed
* for initialization.
*/
static void abyss_enable(struct net_device *dev)
{
unsigned char reset_reg;
unsigned long ioaddr;
ioaddr = dev->base_addr;
reset_reg = inb(ioaddr + PCIBM2_RESET_REG);
reset_reg |= PCIBM2_RESET_REG_CHIP_NRES;
outb(reset_reg, ioaddr + PCIBM2_RESET_REG);
tms380tr_wait(100);
}
/*
* Enable the functions of the Madge chipset needed for
* full working order.
*/
static int abyss_chipset_init(struct net_device *dev)
{
unsigned char reset_reg;
unsigned long ioaddr;
ioaddr = dev->base_addr;
reset_reg = inb(ioaddr + PCIBM2_RESET_REG);
reset_reg |= PCIBM2_RESET_REG_CHIP_NRES;
outb(reset_reg, ioaddr + PCIBM2_RESET_REG);
reset_reg &= ~(PCIBM2_RESET_REG_CHIP_NRES |
PCIBM2_RESET_REG_FIFO_NRES |
PCIBM2_RESET_REG_SIF_NRES);
outb(reset_reg, ioaddr + PCIBM2_RESET_REG);
tms380tr_wait(100);
reset_reg |= PCIBM2_RESET_REG_CHIP_NRES;
outb(reset_reg, ioaddr + PCIBM2_RESET_REG);
reset_reg |= PCIBM2_RESET_REG_SIF_NRES;
outb(reset_reg, ioaddr + PCIBM2_RESET_REG);
reset_reg |= PCIBM2_RESET_REG_FIFO_NRES;
outb(reset_reg, ioaddr + PCIBM2_RESET_REG);
outb(PCIBM2_INT_CONTROL_REG_SINTEN |
PCIBM2_INT_CONTROL_REG_PCI_ERR_ENABLE,
ioaddr + PCIBM2_INT_CONTROL_REG);
outb(30, ioaddr + PCIBM2_FIFO_THRESHOLD);
return 0;
}
static inline void abyss_chipset_close(struct net_device *dev)
{
unsigned long ioaddr;
ioaddr = dev->base_addr;
outb(0, ioaddr + PCIBM2_RESET_REG);
}
/*
* Read configuration data from the AT24 SEEPROM on Madge cards.
*
*/
static void abyss_read_eeprom(struct net_device *dev)
{
struct net_local *tp;
unsigned long ioaddr;
unsigned short val;
int i;
tp = netdev_priv(dev);
ioaddr = dev->base_addr;
/* Must enable glue chip first */
abyss_enable(dev);
val = at24_readb(ioaddr + PCIBM2_SEEPROM_REG,
PCIBM2_SEEPROM_RING_SPEED);
tp->DataRate = val?SPEED_4:SPEED_16; /* set open speed */
printk("%s: SEEPROM: ring speed: %dMb/sec\n", dev->name, tp->DataRate);
val = at24_readb(ioaddr + PCIBM2_SEEPROM_REG,
PCIBM2_SEEPROM_RAM_SIZE) * 128;
printk("%s: SEEPROM: adapter RAM: %dkb\n", dev->name, val);
dev->addr_len = 6;
for (i = 0; i < 6; i++)
dev->dev_addr[i] = at24_readb(ioaddr + PCIBM2_SEEPROM_REG,
PCIBM2_SEEPROM_BIA+i);
}
static int abyss_open(struct net_device *dev)
{
abyss_chipset_init(dev);
tms380tr_open(dev);
return 0;
}
static int abyss_close(struct net_device *dev)
{
tms380tr_close(dev);
abyss_chipset_close(dev);
return 0;
}
static void __devexit abyss_detach (struct pci_dev *pdev)
{
struct net_device *dev = pci_get_drvdata(pdev);
BUG_ON(!dev);
unregister_netdev(dev);
release_region(dev->base_addr-0x10, ABYSS_IO_EXTENT);
free_irq(dev->irq, dev);
tmsdev_term(dev);
free_netdev(dev);
pci_set_drvdata(pdev, NULL);
}
static struct pci_driver abyss_driver = {
.name = "abyss",
.id_table = abyss_pci_tbl,
.probe = abyss_attach,
.remove = __devexit_p(abyss_detach),
};
static int __init abyss_init (void)
{
abyss_netdev_ops = tms380tr_netdev_ops;
abyss_netdev_ops.ndo_open = abyss_open;
abyss_netdev_ops.ndo_stop = abyss_close;
return pci_register_driver(&abyss_driver);
}
static void __exit abyss_rmmod (void)
{
pci_unregister_driver (&abyss_driver);
}
module_init(abyss_init);
module_exit(abyss_rmmod);