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linux-sg2042/drivers/net/sk_g16.c

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/*-
* Copyright (C) 1994 by PJD Weichmann & SWS Bern, Switzerland
*
* This software may be used and distributed according to the terms
* of the GNU General Public License, incorporated herein by reference.
*
* Module : sk_g16.c
*
* Version : $Revision: 1.1 $
*
* Author : Patrick J.D. Weichmann
*
* Date Created : 94/05/26
* Last Updated : $Date: 1994/06/30 16:25:15 $
*
* Description : Schneider & Koch G16 Ethernet Device Driver for
* Linux Kernel >= 1.1.22
* Update History :
* Paul Gortmaker, 03/97: Fix for v2.1.x to use read{b,w}
* write{b,w} and memcpy -> memcpy_{to,from}io
*
* Jeff Garzik, 06/2000, Modularize
*
-*/
static const char rcsid[] = "$Id: sk_g16.c,v 1.1 1994/06/30 16:25:15 root Exp $";
/*
* The Schneider & Koch (SK) G16 Network device driver is based
* on the 'ni6510' driver from Michael Hipp which can be found at
* ftp://sunsite.unc.edu/pub/Linux/system/Network/drivers/nidrivers.tar.gz
*
* Sources: 1) ni6510.c by M. Hipp
* 2) depca.c by D.C. Davies
* 3) skeleton.c by D. Becker
* 4) Am7990 Local Area Network Controller for Ethernet (LANCE),
* AMD, Pub. #05698, June 1989
*
* Many Thanks for helping me to get things working to:
*
* A. Cox (A.Cox@swansea.ac.uk)
* M. Hipp (mhipp@student.uni-tuebingen.de)
* R. Bolz (Schneider & Koch, Germany)
*
* To Do:
* - Support of SK_G8 and other SK Network Cards.
* - Autoset memory mapped RAM. Check for free memory and then
* configure RAM correctly.
* - SK_close should really set card in to initial state.
* - Test if IRQ 3 is not switched off. Use autoirq() functionality.
* (as in /drivers/net/skeleton.c)
* - Implement Multicast addressing. At minimum something like
* in depca.c.
* - Redo the statistics part.
* - Try to find out if the board is in 8 Bit or 16 Bit slot.
* If in 8 Bit mode don't use IRQ 11.
* - (Try to make it slightly faster.)
* - Power management support
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/fcntl.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/bitops.h>
#include <asm/system.h>
#include <asm/io.h>
#include "sk_g16.h"
/*
* Schneider & Koch Card Definitions
* =================================
*/
#define SK_NAME "SK_G16"
/*
* SK_G16 Configuration
* --------------------
*/
/*
* Abbreviations
* -------------
*
* RAM - used for the 16KB shared memory
* Boot_ROM, ROM - are used for referencing the BootEPROM
*
* SK_BOOT_ROM and SK_ADDR are symbolic constants used to configure
* the behaviour of the driver and the SK_G16.
*
* ! See sk_g16.install on how to install and configure the driver !
*
* SK_BOOT_ROM defines if the Boot_ROM should be switched off or not.
*
* SK_ADDR defines the address where the RAM will be mapped into the real
* host memory.
* valid addresses are from 0xa0000 to 0xfc000 in 16Kbyte steps.
*/
#define SK_BOOT_ROM 1 /* 1=BootROM on 0=off */
#define SK_ADDR 0xcc000
/*
* In POS3 are bits A14-A19 of the address bus. These bits can be set
* to choose the RAM address. That's why we only can choose the RAM address
* in 16KB steps.
*/
#define POS_ADDR (rom_addr>>14) /* Do not change this line */
/*
* SK_G16 I/O PORT's + IRQ's + Boot_ROM locations
* ----------------------------------------------
*/
/*
* As nearly every card has also SK_G16 a specified I/O Port region and
* only a few possible IRQ's.
* In the Installation Guide from Schneider & Koch is listed a possible
* Interrupt IRQ2. IRQ2 is always IRQ9 in boards with two cascaded interrupt
* controllers. So we use in SK_IRQS IRQ9.
*/
/* Don't touch any of the following #defines. */
#define SK_IO_PORTS { 0x100, 0x180, 0x208, 0x220, 0x288, 0x320, 0x328, 0x390, 0 }
#define SK_IRQS { 3, 5, 9, 11, 0 }
#define SK_BOOT_ROM_LOCATIONS { 0xc0000, 0xc4000, 0xc8000, 0xcc000, 0xd0000, 0xd4000, 0xd8000, 0xdc000, 0 }
#define SK_BOOT_ROM_ID { 0x55, 0xaa, 0x10, 0x50, 0x06, 0x33 }
/*
* SK_G16 POS REGISTERS
* --------------------
*/
/*
* SK_G16 has a Programmable Option Select (POS) Register.
* The POS is composed of 8 separate registers (POS0-7) which
* are I/O mapped on an address set by the W1 switch.
*
*/
#define SK_POS_SIZE 8 /* 8 I/O Ports are used by SK_G16 */
#define SK_POS0 ioaddr /* Card-ID Low (R) */
#define SK_POS1 ioaddr+1 /* Card-ID High (R) */
#define SK_POS2 ioaddr+2 /* Card-Enable, Boot-ROM Disable (RW) */
#define SK_POS3 ioaddr+3 /* Base address of RAM */
#define SK_POS4 ioaddr+4 /* IRQ */
/* POS5 - POS7 are unused */
/*
* SK_G16 MAC PREFIX
* -----------------
*/
/*
* Scheider & Koch manufacturer code (00:00:a5).
* This must be checked, that we are sure it is a SK card.
*/
#define SK_MAC0 0x00
#define SK_MAC1 0x00
#define SK_MAC2 0x5a
/*
* SK_G16 ID
* ---------
*/
/*
* If POS0,POS1 contain the following ID, then we know
* at which I/O Port Address we are.
*/
#define SK_IDLOW 0xfd
#define SK_IDHIGH 0x6a
/*
* LANCE POS Bit definitions
* -------------------------
*/
#define SK_ROM_RAM_ON (POS2_CARD)
#define SK_ROM_RAM_OFF (POS2_EPROM)
#define SK_ROM_ON (inb(SK_POS2) & POS2_CARD)
#define SK_ROM_OFF (inb(SK_POS2) | POS2_EPROM)
#define SK_RAM_ON (inb(SK_POS2) | POS2_CARD)
#define SK_RAM_OFF (inb(SK_POS2) & POS2_EPROM)
#define POS2_CARD 0x0001 /* 1 = SK_G16 on 0 = off */
#define POS2_EPROM 0x0002 /* 1 = Boot EPROM off 0 = on */
/*
* SK_G16 Memory mapped Registers
* ------------------------------
*
*/
#define SK_IOREG (&board->ioreg) /* LANCE data registers. */
#define SK_PORT (&board->port) /* Control, Status register */
#define SK_IOCOM (&board->iocom) /* I/O Command */
/*
* SK_G16 Status/Control Register bits
* -----------------------------------
*
* (C) Controlreg (S) Statusreg
*/
/*
* Register transfer: 0 = no transfer
* 1 = transferring data between LANCE and I/O reg
*/
#define SK_IORUN 0x20
/*
* LANCE interrupt: 0 = LANCE interrupt occurred
* 1 = no LANCE interrupt occurred
*/
#define SK_IRQ 0x10
#define SK_RESET 0x08 /* Reset SK_CARD: 0 = RESET 1 = normal */
#define SK_RW 0x02 /* 0 = write to 1 = read from */
#define SK_ADR 0x01 /* 0 = REG DataPort 1 = RAP Reg addr port */
#define SK_RREG SK_RW /* Transferdirection to read from lance */
#define SK_WREG 0 /* Transferdirection to write to lance */
#define SK_RAP SK_ADR /* Destination Register RAP */
#define SK_RDATA 0 /* Destination Register REG DataPort */
/*
* SK_G16 I/O Command
* ------------------
*/
/*
* Any bitcombination sets the internal I/O bit (transfer will start)
* when written to I/O Command
*/
#define SK_DOIO 0x80 /* Do Transfer */
/*
* LANCE RAP (Register Address Port).
* ---------------------------------
*/
/*
* The LANCE internal registers are selected through the RAP.
* The Registers are:
*
* CSR0 - Status and Control flags
* CSR1 - Low order bits of initialize block (bits 15:00)
* CSR2 - High order bits of initialize block (bits 07:00, 15:08 are reserved)
* CSR3 - Allows redefinition of the Bus Master Interface.
* This register must be set to 0x0002, which means BSWAP = 0,
* ACON = 1, BCON = 0;
*
*/
#define CSR0 0x00
#define CSR1 0x01
#define CSR2 0x02
#define CSR3 0x03
/*
* General Definitions
* ===================
*/
/*
* Set the number of Tx and Rx buffers, using Log_2(# buffers).
* We have 16KB RAM which can be accessed by the LANCE. In the
* memory are not only the buffers but also the ring descriptors and
* the initialize block.
* Don't change anything unless you really know what you do.
*/
#define LC_LOG_TX_BUFFERS 1 /* (2 == 2^^1) 2 Transmit buffers */
#define LC_LOG_RX_BUFFERS 3 /* (8 == 2^^3) 8 Receive buffers */
/* Descriptor ring sizes */
#define TMDNUM (1 << (LC_LOG_TX_BUFFERS)) /* 2 Transmit descriptor rings */
#define RMDNUM (1 << (LC_LOG_RX_BUFFERS)) /* 8 Receive Buffers */
/* Define Mask for setting RMD, TMD length in the LANCE init_block */
#define TMDNUMMASK (LC_LOG_TX_BUFFERS << 29)
#define RMDNUMMASK (LC_LOG_RX_BUFFERS << 29)
/*
* Data Buffer size is set to maximum packet length.
*/
#define PKT_BUF_SZ 1518
/*
* The number of low I/O ports used by the ethercard.
*/
#define ETHERCARD_TOTAL_SIZE SK_POS_SIZE
/*
* SK_DEBUG
*
* Here you can choose what level of debugging wanted.
*
* If SK_DEBUG and SK_DEBUG2 are undefined, then only the
* necessary messages will be printed.
*
* If SK_DEBUG is defined, there will be many debugging prints
* which can help to find some mistakes in configuration or even
* in the driver code.
*
* If SK_DEBUG2 is defined, many many messages will be printed
* which normally you don't need. I used this to check the interrupt
* routine.
*
* (If you define only SK_DEBUG2 then only the messages for
* checking interrupts will be printed!)
*
* Normal way of live is:
*
* For the whole thing get going let both symbolic constants
* undefined. If you face any problems and you know what's going
* on (you know something about the card and you can interpret some
* hex LANCE register output) then define SK_DEBUG
*
*/
#undef SK_DEBUG /* debugging */
#undef SK_DEBUG2 /* debugging with more verbose report */
#ifdef SK_DEBUG
#define PRINTK(x) printk x
#else
#define PRINTK(x) /**/
#endif
#ifdef SK_DEBUG2
#define PRINTK2(x) printk x
#else
#define PRINTK2(x) /**/
#endif
/*
* SK_G16 RAM
*
* The components are memory mapped and can be set in a region from
* 0x00000 through 0xfc000 in 16KB steps.
*
* The Network components are: dual ported RAM, Prom, I/O Reg, Status-,
* Controlregister and I/O Command.
*
* dual ported RAM: This is the only memory region which the LANCE chip
* has access to. From the Lance it is addressed from 0x0000 to
* 0x3fbf. The host accesses it normally.
*
* PROM: The PROM obtains the ETHERNET-MAC-Address. It is realised as a
* 8-Bit PROM, this means only the 16 even addresses are used of the
* 32 Byte Address region. Access to an odd address results in invalid
* data.
*
* LANCE I/O Reg: The I/O Reg is build of 4 single Registers, Low-Byte Write,
* Hi-Byte Write, Low-Byte Read, Hi-Byte Read.
* Transfer from or to the LANCE is always in 16Bit so Low and High
* registers are always relevant.
*
* The Data from the Readregister is not the data in the Writeregister!!
*
* Port: Status- and Controlregister.
* Two different registers which share the same address, Status is
* read-only, Control is write-only.
*
* I/O Command:
* Any bitcombination written in here starts the transmission between
* Host and LANCE.
*/
typedef struct
{
unsigned char ram[0x3fc0]; /* 16KB dual ported ram */
unsigned char rom[0x0020]; /* 32Byte PROM containing 6Byte MAC */
unsigned char res1[0x0010]; /* reserved */
unsigned volatile short ioreg;/* LANCE I/O Register */
unsigned volatile char port; /* Statusregister and Controlregister */
unsigned char iocom; /* I/O Command Register */
} SK_RAM;
/* struct */
/*
* This is the structure for the dual ported ram. We
* have exactly 16 320 Bytes. In here there must be:
*
* - Initialize Block (starting at a word boundary)
* - Receive and Transmit Descriptor Rings (quadword boundary)
* - Data Buffers (arbitrary boundary)
*
* This is because LANCE has on SK_G16 only access to the dual ported
* RAM and nowhere else.
*/
struct SK_ram
{
struct init_block ib;
struct tmd tmde[TMDNUM];
struct rmd rmde[RMDNUM];
char tmdbuf[TMDNUM][PKT_BUF_SZ];
char rmdbuf[RMDNUM][PKT_BUF_SZ];
};
/*
* Structure where all necessary information is for ring buffer
* management and statistics.
*/
struct priv
{
struct SK_ram *ram; /* dual ported ram structure */
struct rmd *rmdhead; /* start of receive ring descriptors */
struct tmd *tmdhead; /* start of transmit ring descriptors */
int rmdnum; /* actual used ring descriptor */
int tmdnum; /* actual transmit descriptor for transmitting data */
int tmdlast; /* last sent descriptor used for error handling, etc */
void *rmdbufs[RMDNUM]; /* pointer to the receive buffers */
void *tmdbufs[TMDNUM]; /* pointer to the transmit buffers */
struct net_device_stats stats; /* Device driver statistics */
};
/* global variable declaration */
/* IRQ map used to reserve a IRQ (see SK_open()) */
/* static variables */
static SK_RAM *board; /* pointer to our memory mapped board components */
static DEFINE_SPINLOCK(SK_lock);
/* Macros */
/* Function Prototypes */
/*
* Device Driver functions
* -----------------------
* See for short explanation of each function its definitions header.
*/
static int SK_probe(struct net_device *dev, short ioaddr);
static void SK_timeout(struct net_device *dev);
static int SK_open(struct net_device *dev);
static int SK_send_packet(struct sk_buff *skb, struct net_device *dev);
static irqreturn_t SK_interrupt(int irq, void *dev_id, struct pt_regs * regs);
static void SK_rxintr(struct net_device *dev);
static void SK_txintr(struct net_device *dev);
static int SK_close(struct net_device *dev);
static struct net_device_stats *SK_get_stats(struct net_device *dev);
unsigned int SK_rom_addr(void);
static void set_multicast_list(struct net_device *dev);
/*
* LANCE Functions
* ---------------
*/
static int SK_lance_init(struct net_device *dev, unsigned short mode);
void SK_reset_board(void);
void SK_set_RAP(int reg_number);
int SK_read_reg(int reg_number);
int SK_rread_reg(void);
void SK_write_reg(int reg_number, int value);
/*
* Debugging functions
* -------------------
*/
void SK_print_pos(struct net_device *dev, char *text);
void SK_print_dev(struct net_device *dev, char *text);
void SK_print_ram(struct net_device *dev);
/*-
* Function : SK_init
* Author : Patrick J.D. Weichmann
* Date Created : 94/05/26
*
* Description : Check for a SK_G16 network adaptor and initialize it.
* This function gets called by dev_init which initializes
* all Network devices.
*
* Parameters : I : struct net_device *dev - structure preconfigured
* from Space.c
* Return Value : 0 = Driver Found and initialized
* Errors : ENODEV - no device found
* ENXIO - not probed
* Globals : None
* Update History :
* YY/MM/DD uid Description
-*/
static int io; /* 0 == probe */
/*
* Check for a network adaptor of this type, and return '0' if one exists.
* If dev->base_addr == 0, probe all likely locations.
* If dev->base_addr == 1, always return failure.
*/
struct net_device * __init SK_init(int unit)
{
int *port, ports[] = SK_IO_PORTS; /* SK_G16 supported ports */
static unsigned version_printed;
struct net_device *dev = alloc_etherdev(sizeof(struct priv));
int err = -ENODEV;
if (!dev)
return ERR_PTR(-ENOMEM);
if (unit >= 0) {
sprintf(dev->name, "eth%d", unit);
netdev_boot_setup_check(dev);
io = dev->base_addr;
}
if (version_printed++ == 0)
PRINTK(("%s: %s", SK_NAME, rcsid));
if (io > 0xff) { /* Check a single specified address */
err = -EBUSY;
/* Check if on specified address is a SK_G16 */
if (request_region(io, ETHERCARD_TOTAL_SIZE, "sk_g16")) {
err = SK_probe(dev, io);
if (!err)
goto got_it;
release_region(io, ETHERCARD_TOTAL_SIZE);
}
} else if (io > 0) { /* Don't probe at all */
err = -ENXIO;
} else {
/* Autoprobe base_addr */
for (port = &ports[0]; *port; port++) {
io = *port;
/* Check if I/O Port region is used by another board */
if (!request_region(io, ETHERCARD_TOTAL_SIZE, "sk_g16"))
continue; /* Try next Port address */
/* Check if at ioaddr is a SK_G16 */
if (SK_probe(dev, io) == 0)
goto got_it;
release_region(io, ETHERCARD_TOTAL_SIZE);
}
}
err_out:
free_netdev(dev);
return ERR_PTR(err);
got_it:
err = register_netdev(dev);
if (err) {
release_region(dev->base_addr, ETHERCARD_TOTAL_SIZE);
goto err_out;
}
return dev;
} /* End of SK_init */
MODULE_AUTHOR("Patrick J.D. Weichmann");
MODULE_DESCRIPTION("Schneider & Koch G16 Ethernet Device Driver");
MODULE_LICENSE("GPL");
MODULE_PARM(io, "i");
MODULE_PARM_DESC(io, "0 to probe common ports (unsafe), or the I/O base of the board");
#ifdef MODULE
static struct net_device *SK_dev;
static int __init SK_init_module (void)
{
SK_dev = SK_init(-1);
return IS_ERR(SK_dev) ? PTR_ERR(SK_dev) : 0;
}
static void __exit SK_cleanup_module (void)
{
unregister_netdev(SK_dev);
release_region(SK_dev->base_addr, ETHERCARD_TOTAL_SIZE);
free_netdev(SK_dev);
}
module_init(SK_init_module);
module_exit(SK_cleanup_module);
#endif
/*-
* Function : SK_probe
* Author : Patrick J.D. Weichmann
* Date Created : 94/05/26
*
* Description : This function is called by SK_init and
* does the main part of initialization.
*
* Parameters : I : struct net_device *dev - SK_G16 device structure
* I : short ioaddr - I/O Port address where POS is.
* Return Value : 0 = Initialization done
* Errors : ENODEV - No SK_G16 found
* -1 - Configuration problem
* Globals : board - pointer to SK_RAM
* Update History :
* YY/MM/DD uid Description
* 94/06/30 pwe SK_ADDR now checked and at the correct place
-*/
int __init SK_probe(struct net_device *dev, short ioaddr)
{
int i,j; /* Counters */
int sk_addr_flag = 0; /* SK ADDR correct? 1 - no, 0 - yes */
unsigned int rom_addr; /* used to store RAM address used for POS_ADDR */
struct priv *p = netdev_priv(dev); /* SK_G16 private structure */
if (inb(SK_POS0) != SK_IDLOW || inb(SK_POS1) != SK_IDHIGH)
return -ENODEV;
dev->base_addr = ioaddr;
if (SK_ADDR & 0x3fff || SK_ADDR < 0xa0000)
{
sk_addr_flag = 1;
/*
* Now here we could use a routine which searches for a free
* place in the ram and set SK_ADDR if found. TODO.
*/
}
if (SK_BOOT_ROM) /* Shall we keep Boot_ROM on ? */
{
PRINTK(("## %s: SK_BOOT_ROM is set.\n", SK_NAME));
rom_addr = SK_rom_addr();
if (rom_addr == 0) /* No Boot_ROM found */
{
if (sk_addr_flag) /* No or Invalid SK_ADDR is defined */
{
printk("%s: SK_ADDR %#08x is not valid. Check configuration.\n",
dev->name, SK_ADDR);
return -1;
}
rom_addr = SK_ADDR; /* assign predefined address */
PRINTK(("## %s: NO Bootrom found \n", SK_NAME));
outb(SK_ROM_RAM_OFF, SK_POS2); /* Boot_ROM + RAM off */
outb(POS_ADDR, SK_POS3); /* Set RAM address */
outb(SK_RAM_ON, SK_POS2); /* enable RAM */
}
else if (rom_addr == SK_ADDR)
{
printk("%s: RAM + ROM are set to the same address %#08x\n"
" Check configuration. Now switching off Boot_ROM\n",
SK_NAME, rom_addr);
outb(SK_ROM_RAM_OFF, SK_POS2); /* Boot_ROM + RAM off*/
outb(POS_ADDR, SK_POS3); /* Set RAM address */
outb(SK_RAM_ON, SK_POS2); /* enable RAM */
}
else
{
PRINTK(("## %s: Found ROM at %#08x\n", SK_NAME, rom_addr));
PRINTK(("## %s: Keeping Boot_ROM on\n", SK_NAME));
if (sk_addr_flag) /* No or Invalid SK_ADDR is defined */
{
printk("%s: SK_ADDR %#08x is not valid. Check configuration.\n",
dev->name, SK_ADDR);
return -1;
}
rom_addr = SK_ADDR;
outb(SK_ROM_RAM_OFF, SK_POS2); /* Boot_ROM + RAM off */
outb(POS_ADDR, SK_POS3); /* Set RAM address */
outb(SK_ROM_RAM_ON, SK_POS2); /* RAM on, BOOT_ROM on */
}
}
else /* Don't keep Boot_ROM */
{
PRINTK(("## %s: SK_BOOT_ROM is not set.\n", SK_NAME));
if (sk_addr_flag) /* No or Invalid SK_ADDR is defined */
{
printk("%s: SK_ADDR %#08x is not valid. Check configuration.\n",
dev->name, SK_ADDR);
return -1;
}
rom_addr = SK_rom_addr(); /* Try to find a Boot_ROM */
/* IF we find a Boot_ROM disable it */
outb(SK_ROM_RAM_OFF, SK_POS2); /* Boot_ROM + RAM off */
/* We found a Boot_ROM and it's gone. Set RAM address on
* Boot_ROM address.
*/
if (rom_addr)
{
printk("%s: We found Boot_ROM at %#08x. Now setting RAM on"
"that address\n", SK_NAME, rom_addr);
outb(POS_ADDR, SK_POS3); /* Set RAM on Boot_ROM address */
}
else /* We did not find a Boot_ROM, use predefined SK_ADDR for ram */
{
if (sk_addr_flag) /* No or Invalid SK_ADDR is defined */
{
printk("%s: SK_ADDR %#08x is not valid. Check configuration.\n",
dev->name, SK_ADDR);
return -1;
}
rom_addr = SK_ADDR;
outb(POS_ADDR, SK_POS3); /* Set RAM address */
}
outb(SK_RAM_ON, SK_POS2); /* enable RAM */
}
#ifdef SK_DEBUG
SK_print_pos(dev, "POS registers after ROM, RAM config");
#endif
board = (SK_RAM *) isa_bus_to_virt(rom_addr);
/* Read in station address */
for (i = 0, j = 0; i < ETH_ALEN; i++, j+=2)
{
dev->dev_addr[i] = readb(board->rom+j);
}
/* Check for manufacturer code */
if (!(dev->dev_addr[0] == SK_MAC0 &&
dev->dev_addr[1] == SK_MAC1 &&
dev->dev_addr[2] == SK_MAC2) )
{
PRINTK(("## %s: We did not find SK_G16 at RAM location.\n",
SK_NAME));
return -ENODEV; /* NO SK_G16 found */
}
printk("%s: %s found at %#3x, HW addr: %#04x:%02x:%02x:%02x:%02x:%02x\n",
dev->name,
"Schneider & Koch Netcard",
(unsigned int) dev->base_addr,
dev->dev_addr[0],
dev->dev_addr[1],
dev->dev_addr[2],
dev->dev_addr[3],
dev->dev_addr[4],
dev->dev_addr[5]);
memset((char *) dev->priv, 0, sizeof(struct priv)); /* clear memory */
/* Assign our Device Driver functions */
dev->open = SK_open;
dev->stop = SK_close;
dev->hard_start_xmit = SK_send_packet;
dev->get_stats = SK_get_stats;
dev->set_multicast_list = set_multicast_list;
dev->tx_timeout = SK_timeout;
dev->watchdog_timeo = HZ/7;
dev->flags &= ~IFF_MULTICAST;
/* Initialize private structure */
p->ram = (struct SK_ram *) rom_addr; /* Set dual ported RAM addr */
p->tmdhead = &(p->ram)->tmde[0]; /* Set TMD head */
p->rmdhead = &(p->ram)->rmde[0]; /* Set RMD head */
/* Initialize buffer pointers */
for (i = 0; i < TMDNUM; i++)
{
p->tmdbufs[i] = &(p->ram)->tmdbuf[i];
}
for (i = 0; i < RMDNUM; i++)
{
p->rmdbufs[i] = &(p->ram)->rmdbuf[i];
}
#ifdef SK_DEBUG
SK_print_pos(dev, "End of SK_probe");
SK_print_ram(dev);
#endif
return 0; /* Initialization done */
} /* End of SK_probe() */
/*-
* Function : SK_open
* Author : Patrick J.D. Weichmann
* Date Created : 94/05/26
*
* Description : This function is called sometimes after booting
* when ifconfig program is run.
*
* This function requests an IRQ, sets the correct
* IRQ in the card. Then calls SK_lance_init() to
* init and start the LANCE chip. Then if everything is
* ok returns with 0 (OK), which means SK_G16 is now
* opened and operational.
*
* (Called by dev_open() /net/inet/dev.c)
*
* Parameters : I : struct net_device *dev - SK_G16 device structure
* Return Value : 0 - Device opened
* Errors : -EAGAIN - Open failed
* Side Effects : None
* Update History :
* YY/MM/DD uid Description
-*/
static int SK_open(struct net_device *dev)
{
int i = 0;
int irqval = 0;
int ioaddr = dev->base_addr;
int irqtab[] = SK_IRQS;
struct priv *p = netdev_priv(dev);
PRINTK(("## %s: At beginning of SK_open(). CSR0: %#06x\n",
SK_NAME, SK_read_reg(CSR0)));
if (dev->irq == 0) /* Autoirq */
{
i = 0;
/*
* Check if one IRQ out of SK_IRQS is free and install
* interrupt handler.
* Most done by request_irq().
* irqval: 0 - interrupt handler installed for IRQ irqtab[i]
* -EBUSY - interrupt busy
* -EINVAL - irq > 15 or handler = NULL
*/
do
{
irqval = request_irq(irqtab[i], &SK_interrupt, 0, "sk_g16", dev);
i++;
} while (irqval && irqtab[i]);
if (irqval) /* We tried every possible IRQ but no success */
{
printk("%s: unable to get an IRQ\n", dev->name);
return -EAGAIN;
}
dev->irq = irqtab[--i];
outb(i<<2, SK_POS4); /* Set Card on probed IRQ */
}
else if (dev->irq == 2) /* IRQ2 is always IRQ9 */
{
if (request_irq(9, &SK_interrupt, 0, "sk_g16", dev))
{
printk("%s: unable to get IRQ 9\n", dev->name);
return -EAGAIN;
}
dev->irq = 9;
/*
* Now we set card on IRQ2.
* This can be confusing, but remember that IRQ2 on the network
* card is in reality IRQ9
*/
outb(0x08, SK_POS4); /* set card to IRQ2 */
}
else /* Check IRQ as defined in Space.c */
{
int i = 0;
/* check if IRQ free and valid. Then install Interrupt handler */
if (request_irq(dev->irq, &SK_interrupt, 0, "sk_g16", dev))
{
printk("%s: unable to get selected IRQ\n", dev->name);
return -EAGAIN;
}
switch(dev->irq)
{
case 3: i = 0;
break;
case 5: i = 1;
break;
case 2: i = 2;
break;
case 11:i = 3;
break;
default:
printk("%s: Preselected IRQ %d is invalid for %s boards",
dev->name,
dev->irq,
SK_NAME);
return -EAGAIN;
}
outb(i<<2, SK_POS4); /* Set IRQ on card */
}
printk("%s: Schneider & Koch G16 at %#3x, IRQ %d, shared mem at %#08x\n",
dev->name, (unsigned int)dev->base_addr,
(int) dev->irq, (unsigned int) p->ram);
if (!(i = SK_lance_init(dev, 0))) /* LANCE init OK? */
{
netif_start_queue(dev);
#ifdef SK_DEBUG
/*
* This debug block tries to stop LANCE,
* reinit LANCE with transmitter and receiver disabled,
* then stop again and reinit with NORMAL_MODE
*/
printk("## %s: After lance init. CSR0: %#06x\n",
SK_NAME, SK_read_reg(CSR0));
SK_write_reg(CSR0, CSR0_STOP);
printk("## %s: LANCE stopped. CSR0: %#06x\n",
SK_NAME, SK_read_reg(CSR0));
SK_lance_init(dev, MODE_DTX | MODE_DRX);
printk("## %s: Reinit with DTX + DRX off. CSR0: %#06x\n",
SK_NAME, SK_read_reg(CSR0));
SK_write_reg(CSR0, CSR0_STOP);
printk("## %s: LANCE stopped. CSR0: %#06x\n",
SK_NAME, SK_read_reg(CSR0));
SK_lance_init(dev, MODE_NORMAL);
printk("## %s: LANCE back to normal mode. CSR0: %#06x\n",
SK_NAME, SK_read_reg(CSR0));
SK_print_pos(dev, "POS regs before returning OK");
#endif /* SK_DEBUG */
return 0; /* SK_open() is successful */
}
else /* LANCE init failed */
{
PRINTK(("## %s: LANCE init failed: CSR0: %#06x\n",
SK_NAME, SK_read_reg(CSR0)));
return -EAGAIN;
}
} /* End of SK_open() */
/*-
* Function : SK_lance_init
* Author : Patrick J.D. Weichmann
* Date Created : 94/05/26
*
* Description : Reset LANCE chip, fill RMD, TMD structures with
* start values and Start LANCE.
*
* Parameters : I : struct net_device *dev - SK_G16 device structure
* I : int mode - put LANCE into "mode" see data-sheet for
* more info.
* Return Value : 0 - Init done
* Errors : -1 - Init failed
* Update History :
* YY/MM/DD uid Description
-*/
static int SK_lance_init(struct net_device *dev, unsigned short mode)
{
int i;
unsigned long flags;
struct priv *p = netdev_priv(dev);
struct tmd *tmdp;
struct rmd *rmdp;
PRINTK(("## %s: At beginning of LANCE init. CSR0: %#06x\n",
SK_NAME, SK_read_reg(CSR0)));
/* Reset LANCE */
SK_reset_board();
/* Initialize TMD's with start values */
p->tmdnum = 0; /* First descriptor for transmitting */
p->tmdlast = 0; /* First descriptor for reading stats */
for (i = 0; i < TMDNUM; i++) /* Init all TMD's */
{
tmdp = p->tmdhead + i;
writel((unsigned long) p->tmdbufs[i], tmdp->u.buffer); /* assign buffer */
/* Mark TMD as start and end of packet */
writeb(TX_STP | TX_ENP, &tmdp->u.s.status);
}
/* Initialize RMD's with start values */
p->rmdnum = 0; /* First RMD which will be used */
for (i = 0; i < RMDNUM; i++) /* Init all RMD's */
{
rmdp = p->rmdhead + i;
writel((unsigned long) p->rmdbufs[i], rmdp->u.buffer); /* assign buffer */
/*
* LANCE must be owner at beginning so that he can fill in
* receiving packets, set status and release RMD
*/
writeb(RX_OWN, &rmdp->u.s.status);
writew(-PKT_BUF_SZ, &rmdp->blen); /* Buffer Size (two's complement) */
writeb(0, &rmdp->mlen); /* init message length */
}
/* Fill LANCE Initialize Block */
writew(mode, (&((p->ram)->ib.mode))); /* Set operation mode */
for (i = 0; i < ETH_ALEN; i++) /* Set physical address */
{
writeb(dev->dev_addr[i], (&((p->ram)->ib.paddr[i])));
}
for (i = 0; i < 8; i++) /* Set multicast, logical address */
{
writeb(0, (&((p->ram)->ib.laddr[i]))); /* We do not use logical addressing */
}
/* Set ring descriptor pointers and set number of descriptors */
writel((int)p->rmdhead | RMDNUMMASK, (&((p->ram)->ib.rdrp)));
writel((int)p->tmdhead | TMDNUMMASK, (&((p->ram)->ib.tdrp)));
/* Prepare LANCE Control and Status Registers */
spin_lock_irqsave(&SK_lock, flags);
SK_write_reg(CSR3, CSR3_ACON); /* Ale Control !!!THIS MUST BE SET!!!! */
/*
* LANCE addresses the RAM from 0x0000 to 0x3fbf and has no access to
* PC Memory locations.
*
* In structure SK_ram is defined that the first thing in ram
* is the initialization block. So his address is for LANCE always
* 0x0000
*
* CSR1 contains low order bits 15:0 of initialization block address
* CSR2 is built of:
* 7:0 High order bits 23:16 of initialization block address
* 15:8 reserved, must be 0
*/
/* Set initialization block address (must be on word boundary) */
SK_write_reg(CSR1, 0); /* Set low order bits 15:0 */
SK_write_reg(CSR2, 0); /* Set high order bits 23:16 */
PRINTK(("## %s: After setting CSR1-3. CSR0: %#06x\n",
SK_NAME, SK_read_reg(CSR0)));
/* Initialize LANCE */
/*
* INIT = Initialize, when set, causes the LANCE to begin the
* initialization procedure and access the Init Block.
*/
SK_write_reg(CSR0, CSR0_INIT);
spin_unlock_irqrestore(&SK_lock, flags);
/* Wait until LANCE finished initialization */
SK_set_RAP(CSR0); /* Register Address Pointer to CSR0 */
for (i = 0; (i < 100) && !(SK_rread_reg() & CSR0_IDON); i++)
; /* Wait until init done or go ahead if problems (i>=100) */
if (i >= 100) /* Something is wrong ! */
{
printk("%s: can't init am7990, status: %04x "
"init_block: %#08x\n",
dev->name, (int) SK_read_reg(CSR0),
(unsigned int) &(p->ram)->ib);
#ifdef SK_DEBUG
SK_print_pos(dev, "LANCE INIT failed");
SK_print_dev(dev,"Device Structure:");
#endif
return -1; /* LANCE init failed */
}
PRINTK(("## %s: init done after %d ticks\n", SK_NAME, i));
/* Clear Initialize done, enable Interrupts, start LANCE */
SK_write_reg(CSR0, CSR0_IDON | CSR0_INEA | CSR0_STRT);
PRINTK(("## %s: LANCE started. CSR0: %#06x\n", SK_NAME,
SK_read_reg(CSR0)));
return 0; /* LANCE is up and running */
} /* End of SK_lance_init() */
/*-
* Function : SK_send_packet
* Author : Patrick J.D. Weichmann
* Date Created : 94/05/27
*
* Description : Writes an socket buffer into a transmit descriptor
* and starts transmission.
*
* Parameters : I : struct sk_buff *skb - packet to transfer
* I : struct net_device *dev - SK_G16 device structure
* Return Value : 0 - OK
* 1 - Could not transmit (dev_queue_xmit will queue it)
* and try to sent it later
* Globals : None
* Side Effects : None
* Update History :
* YY/MM/DD uid Description
-*/
static void SK_timeout(struct net_device *dev)
{
printk(KERN_WARNING "%s: xmitter timed out, try to restart!\n", dev->name);
SK_lance_init(dev, MODE_NORMAL); /* Reinit LANCE */
netif_wake_queue(dev); /* Clear Transmitter flag */
dev->trans_start = jiffies; /* Mark Start of transmission */
}
static int SK_send_packet(struct sk_buff *skb, struct net_device *dev)
{
struct priv *p = netdev_priv(dev);
struct tmd *tmdp;
static char pad[64];
PRINTK2(("## %s: SK_send_packet() called, CSR0 %#04x.\n",
SK_NAME, SK_read_reg(CSR0)));
/*
* Block a timer-based transmit from overlapping.
* This means check if we are already in.
*/
netif_stop_queue (dev);
{
/* Evaluate Packet length */
short len = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
tmdp = p->tmdhead + p->tmdnum; /* Which descriptor for transmitting */
/* Fill in Transmit Message Descriptor */
/* Copy data into dual ported ram */
memcpy_toio((tmdp->u.buffer & 0x00ffffff), skb->data, skb->len);
if (len != skb->len)
memcpy_toio((tmdp->u.buffer & 0x00ffffff) + skb->len, pad, len-skb->len);
writew(-len, &tmdp->blen); /* set length to transmit */
/*
* Packet start and end is always set because we use the maximum
* packet length as buffer length.
* Relinquish ownership to LANCE
*/
writeb(TX_OWN | TX_STP | TX_ENP, &tmdp->u.s.status);
/* Start Demand Transmission */
SK_write_reg(CSR0, CSR0_TDMD | CSR0_INEA);
dev->trans_start = jiffies; /* Mark start of transmission */
/* Set pointer to next transmit buffer */
p->tmdnum++;
p->tmdnum &= TMDNUM-1;
/* Do we own the next transmit buffer ? */
if (! (readb(&((p->tmdhead + p->tmdnum)->u.s.status)) & TX_OWN) )
{
/*
* We own next buffer and are ready to transmit, so
* clear busy flag
*/
netif_start_queue(dev);
}
p->stats.tx_bytes += skb->len;
}
dev_kfree_skb(skb);
return 0;
} /* End of SK_send_packet */
/*-
* Function : SK_interrupt
* Author : Patrick J.D. Weichmann
* Date Created : 94/05/27
*
* Description : SK_G16 interrupt handler which checks for LANCE
* Errors, handles transmit and receive interrupts
*
* Parameters : I : int irq, void *dev_id, struct pt_regs * regs -
* Return Value : None
* Errors : None
* Globals : None
* Side Effects : None
* Update History :
* YY/MM/DD uid Description
-*/
static irqreturn_t SK_interrupt(int irq, void *dev_id, struct pt_regs * regs)
{
int csr0;
struct net_device *dev = dev_id;
struct priv *p = netdev_priv(dev);
PRINTK2(("## %s: SK_interrupt(). status: %#06x\n",
SK_NAME, SK_read_reg(CSR0)));
if (dev == NULL)
{
printk("SK_interrupt(): IRQ %d for unknown device.\n", irq);
}
spin_lock (&SK_lock);
csr0 = SK_read_reg(CSR0); /* store register for checking */
/*
* Acknowledge all of the current interrupt sources, disable
* Interrupts (INEA = 0)
*/
SK_write_reg(CSR0, csr0 & CSR0_CLRALL);
if (csr0 & CSR0_ERR) /* LANCE Error */
{
printk("%s: error: %04x\n", dev->name, csr0);
if (csr0 & CSR0_MISS) /* No place to store packet ? */
{
p->stats.rx_dropped++;
}
}
if (csr0 & CSR0_RINT) /* Receive Interrupt (packet arrived) */
{
SK_rxintr(dev);
}
if (csr0 & CSR0_TINT) /* Transmit interrupt (packet sent) */
{
SK_txintr(dev);
}
SK_write_reg(CSR0, CSR0_INEA); /* Enable Interrupts */
spin_unlock (&SK_lock);
return IRQ_HANDLED;
} /* End of SK_interrupt() */
/*-
* Function : SK_txintr
* Author : Patrick J.D. Weichmann
* Date Created : 94/05/27
*
* Description : After sending a packet we check status, update
* statistics and relinquish ownership of transmit
* descriptor ring.
*
* Parameters : I : struct net_device *dev - SK_G16 device structure
* Return Value : None
* Errors : None
* Globals : None
* Update History :
* YY/MM/DD uid Description
-*/
static void SK_txintr(struct net_device *dev)
{
int tmdstat;
struct tmd *tmdp;
struct priv *p = netdev_priv(dev);
PRINTK2(("## %s: SK_txintr() status: %#06x\n",
SK_NAME, SK_read_reg(CSR0)));
tmdp = p->tmdhead + p->tmdlast; /* Which buffer we sent at last ? */
/* Set next buffer */
p->tmdlast++;
p->tmdlast &= TMDNUM-1;
tmdstat = readb(&tmdp->u.s.status);
/*
* We check status of transmitted packet.
* see LANCE data-sheet for error explanation
*/
if (tmdstat & TX_ERR) /* Error occurred */
{
int stat2 = readw(&tmdp->status2);
printk("%s: TX error: %04x %04x\n", dev->name, tmdstat, stat2);
if (stat2 & TX_TDR) /* TDR problems? */
{
printk("%s: tdr-problems \n", dev->name);
}
if (stat2 & TX_RTRY) /* Failed in 16 attempts to transmit ? */
p->stats.tx_aborted_errors++;
if (stat2 & TX_LCOL) /* Late collision ? */
p->stats.tx_window_errors++;
if (stat2 & TX_LCAR) /* Loss of Carrier ? */
p->stats.tx_carrier_errors++;
if (stat2 & TX_UFLO) /* Underflow error ? */
{
p->stats.tx_fifo_errors++;
/*
* If UFLO error occurs it will turn transmitter of.
* So we must reinit LANCE
*/
SK_lance_init(dev, MODE_NORMAL);
}
p->stats.tx_errors++;
writew(0, &tmdp->status2); /* Clear error flags */
}
else if (tmdstat & TX_MORE) /* Collisions occurred ? */
{
/*
* Here I have a problem.
* I only know that there must be one or up to 15 collisions.
* That's why TX_MORE is set, because after 16 attempts TX_RTRY
* will be set which means couldn't send packet aborted transfer.
*
* First I did not have this in but then I thought at minimum
* we see that something was not ok.
* If anyone knows something better than this to handle this
* please report it.
*/
p->stats.collisions++;
}
else /* Packet sent without any problems */
{
p->stats.tx_packets++;
}
/*
* We mark transmitter not busy anymore, because now we have a free
* transmit descriptor which can be filled by SK_send_packet and
* afterwards sent by the LANCE
*
* The function which do handle slow IRQ parts is do_bottom_half()
* which runs at normal kernel priority, that means all interrupt are
* enabled. (see kernel/irq.c)
*
* net_bh does something like this:
* - check if already in net_bh
* - try to transmit something from the send queue
* - if something is in the receive queue send it up to higher
* levels if it is a known protocol
* - try to transmit something from the send queue
*/
netif_wake_queue(dev);
} /* End of SK_txintr() */
/*-
* Function : SK_rxintr
* Author : Patrick J.D. Weichmann
* Date Created : 94/05/27
*
* Description : Buffer sent, check for errors, relinquish ownership
* of the receive message descriptor.
*
* Parameters : I : SK_G16 device structure
* Return Value : None
* Globals : None
* Update History :
* YY/MM/DD uid Description
-*/
static void SK_rxintr(struct net_device *dev)
{
struct rmd *rmdp;
int rmdstat;
struct priv *p = netdev_priv(dev);
PRINTK2(("## %s: SK_rxintr(). CSR0: %#06x\n",
SK_NAME, SK_read_reg(CSR0)));
rmdp = p->rmdhead + p->rmdnum;
/* As long as we own the next entry, check status and send
* it up to higher layer
*/
while (!( (rmdstat = readb(&rmdp->u.s.status)) & RX_OWN))
{
/*
* Start and end of packet must be set, because we use
* the ethernet maximum packet length (1518) as buffer size.
*
* Because our buffers are at maximum OFLO and BUFF errors are
* not to be concerned (see Data sheet)
*/
if ((rmdstat & (RX_STP | RX_ENP)) != (RX_STP | RX_ENP))
{
/* Start of a frame > 1518 Bytes ? */
if (rmdstat & RX_STP)
{
p->stats.rx_errors++; /* bad packet received */
p->stats.rx_length_errors++; /* packet too long */
printk("%s: packet too long\n", dev->name);
}
/*
* All other packets will be ignored until a new frame with
* start (RX_STP) set follows.
*
* What we do is just give descriptor free for new incoming
* packets.
*/
writeb(RX_OWN, &rmdp->u.s.status); /* Relinquish ownership to LANCE */
}
else if (rmdstat & RX_ERR) /* Receive Error ? */
{
printk("%s: RX error: %04x\n", dev->name, (int) rmdstat);
p->stats.rx_errors++;
if (rmdstat & RX_FRAM) p->stats.rx_frame_errors++;
if (rmdstat & RX_CRC) p->stats.rx_crc_errors++;
writeb(RX_OWN, &rmdp->u.s.status); /* Relinquish ownership to LANCE */
}
else /* We have a packet which can be queued for the upper layers */
{
int len = readw(&rmdp->mlen) & 0x0fff; /* extract message length from receive buffer */
struct sk_buff *skb;
skb = dev_alloc_skb(len+2); /* allocate socket buffer */
if (skb == NULL) /* Could not get mem ? */
{
/*
* Couldn't allocate sk_buffer so we give descriptor back
* to Lance, update statistics and go ahead.
*/
writeb(RX_OWN, &rmdp->u.s.status); /* Relinquish ownership to LANCE */
printk("%s: Couldn't allocate sk_buff, deferring packet.\n",
dev->name);
p->stats.rx_dropped++;
break; /* Jump out */
}
/* Prepare sk_buff to queue for upper layers */
skb->dev = dev;
skb_reserve(skb,2); /* Align IP header on 16 byte boundary */
/*
* Copy data out of our receive descriptor into sk_buff.
*
* (rmdp->u.buffer & 0x00ffffff) -> get address of buffer and
* ignore status fields)
*/
memcpy_fromio(skb_put(skb,len), (rmdp->u.buffer & 0x00ffffff), len);
/*
* Notify the upper protocol layers that there is another packet
* to handle
*
* netif_rx() always succeeds. see /net/inet/dev.c for more.
*/
skb->protocol=eth_type_trans(skb,dev);
netif_rx(skb); /* queue packet and mark it for processing */
/*
* Packet is queued and marked for processing so we
* free our descriptor and update statistics
*/
writeb(RX_OWN, &rmdp->u.s.status);
dev->last_rx = jiffies;
p->stats.rx_packets++;
p->stats.rx_bytes += len;
p->rmdnum++;
p->rmdnum %= RMDNUM;
rmdp = p->rmdhead + p->rmdnum;
}
}
} /* End of SK_rxintr() */
/*-
* Function : SK_close
* Author : Patrick J.D. Weichmann
* Date Created : 94/05/26
*
* Description : close gets called from dev_close() and should
* deinstall the card (free_irq, mem etc).
*
* Parameters : I : struct net_device *dev - our device structure
* Return Value : 0 - closed device driver
* Errors : None
* Globals : None
* Update History :
* YY/MM/DD uid Description
-*/
/* I have tried to set BOOT_ROM on and RAM off but then, after a 'ifconfig
* down' the system stops. So I don't shut set card to init state.
*/
static int SK_close(struct net_device *dev)
{
PRINTK(("## %s: SK_close(). CSR0: %#06x\n",
SK_NAME, SK_read_reg(CSR0)));
netif_stop_queue(dev); /* Transmitter busy */
printk("%s: Shutting %s down CSR0 %#06x\n", dev->name, SK_NAME,
(int) SK_read_reg(CSR0));
SK_write_reg(CSR0, CSR0_STOP); /* STOP the LANCE */
free_irq(dev->irq, dev); /* Free IRQ */
return 0; /* always succeed */
} /* End of SK_close() */
/*-
* Function : SK_get_stats
* Author : Patrick J.D. Weichmann
* Date Created : 94/05/26
*
* Description : Return current status structure to upper layers.
* It is called by sprintf_stats (dev.c).
*
* Parameters : I : struct net_device *dev - our device structure
* Return Value : struct net_device_stats * - our current statistics
* Errors : None
* Side Effects : None
* Update History :
* YY/MM/DD uid Description
-*/
static struct net_device_stats *SK_get_stats(struct net_device *dev)
{
struct priv *p = netdev_priv(dev);
PRINTK(("## %s: SK_get_stats(). CSR0: %#06x\n",
SK_NAME, SK_read_reg(CSR0)));
return &p->stats; /* Return Device status */
} /* End of SK_get_stats() */
/*-
* Function : set_multicast_list
* Author : Patrick J.D. Weichmann
* Date Created : 94/05/26
*
* Description : This function gets called when a program performs
* a SIOCSIFFLAGS call. Ifconfig does this if you call
* 'ifconfig [-]allmulti' which enables or disables the
* Promiscuous mode.
* Promiscuous mode is when the Network card accepts all
* packets, not only the packets which match our MAC
* Address. It is useful for writing a network monitor,
* but it is also a security problem. You have to remember
* that all information on the net is not encrypted.
*
* Parameters : I : struct net_device *dev - SK_G16 device Structure
* Return Value : None
* Errors : None
* Globals : None
* Update History :
* YY/MM/DD uid Description
* 95/10/18 ACox New multicast calling scheme
-*/
/* Set or clear the multicast filter for SK_G16.
*/
static void set_multicast_list(struct net_device *dev)
{
if (dev->flags&IFF_PROMISC)
{
/* Reinitialize LANCE with MODE_PROM set */
SK_lance_init(dev, MODE_PROM);
}
else if (dev->mc_count==0 && !(dev->flags&IFF_ALLMULTI))
{
/* Reinitialize LANCE without MODE_PROM */
SK_lance_init(dev, MODE_NORMAL);
}
else
{
/* Multicast with logical address filter on */
/* Reinitialize LANCE without MODE_PROM */
SK_lance_init(dev, MODE_NORMAL);
/* Not implemented yet. */
}
} /* End of set_multicast_list() */
/*-
* Function : SK_rom_addr
* Author : Patrick J.D. Weichmann
* Date Created : 94/06/01
*
* Description : Try to find a Boot_ROM at all possible locations
*
* Parameters : None
* Return Value : Address where Boot_ROM is
* Errors : 0 - Did not find Boot_ROM
* Globals : None
* Update History :
* YY/MM/DD uid Description
-*/
unsigned int __init SK_rom_addr(void)
{
int i,j;
int rom_found = 0;
unsigned int rom_location[] = SK_BOOT_ROM_LOCATIONS;
unsigned char rom_id[] = SK_BOOT_ROM_ID;
unsigned char test_byte;
/* Autodetect Boot_ROM */
PRINTK(("## %s: Autodetection of Boot_ROM\n", SK_NAME));
for (i = 0; (rom_location[i] != 0) && (rom_found == 0); i++)
{
PRINTK(("## Trying ROM location %#08x", rom_location[i]));
rom_found = 1;
for (j = 0; j < 6; j++)
{
test_byte = readb(rom_location[i]+j);
PRINTK((" %02x ", *test_byte));
if(test_byte != rom_id[j])
{
rom_found = 0;
}
}
PRINTK(("\n"));
}
if (rom_found == 1)
{
PRINTK(("## %s: Boot_ROM found at %#08x\n",
SK_NAME, rom_location[(i-1)]));
return (rom_location[--i]);
}
else
{
PRINTK(("%s: No Boot_ROM found\n", SK_NAME));
return 0;
}
} /* End of SK_rom_addr() */
/* LANCE access functions
*
* ! CSR1-3 can only be accessed when in CSR0 the STOP bit is set !
*/
/*-
* Function : SK_reset_board
*
* Author : Patrick J.D. Weichmann
*
* Date Created : 94/05/25
*
* Description : This function resets SK_G16 and all components, but
* POS registers are not changed
*
* Parameters : None
* Return Value : None
* Errors : None
* Globals : SK_RAM *board - SK_RAM structure pointer
*
* Update History :
* YY/MM/DD uid Description
-*/
void SK_reset_board(void)
{
writeb(0x00, SK_PORT); /* Reset active */
mdelay(5); /* Delay min 5ms */
writeb(SK_RESET, SK_PORT); /* Set back to normal operation */
} /* End of SK_reset_board() */
/*-
* Function : SK_set_RAP
* Author : Patrick J.D. Weichmann
* Date Created : 94/05/25
*
* Description : Set LANCE Register Address Port to register
* for later data transfer.
*
* Parameters : I : reg_number - which CSR to read/write from/to
* Return Value : None
* Errors : None
* Globals : SK_RAM *board - SK_RAM structure pointer
* Update History :
* YY/MM/DD uid Description
-*/
void SK_set_RAP(int reg_number)
{
writew(reg_number, SK_IOREG);
writeb(SK_RESET | SK_RAP | SK_WREG, SK_PORT);
writeb(SK_DOIO, SK_IOCOM);
while (readb(SK_PORT) & SK_IORUN)
barrier();
} /* End of SK_set_RAP() */
/*-
* Function : SK_read_reg
* Author : Patrick J.D. Weichmann
* Date Created : 94/05/25
*
* Description : Set RAP and read data from a LANCE CSR register
*
* Parameters : I : reg_number - which CSR to read from
* Return Value : Register contents
* Errors : None
* Globals : SK_RAM *board - SK_RAM structure pointer
* Update History :
* YY/MM/DD uid Description
-*/
int SK_read_reg(int reg_number)
{
SK_set_RAP(reg_number);
writeb(SK_RESET | SK_RDATA | SK_RREG, SK_PORT);
writeb(SK_DOIO, SK_IOCOM);
while (readb(SK_PORT) & SK_IORUN)
barrier();
return (readw(SK_IOREG));
} /* End of SK_read_reg() */
/*-
* Function : SK_rread_reg
* Author : Patrick J.D. Weichmann
* Date Created : 94/05/28
*
* Description : Read data from preseted register.
* This function requires that you know which
* Register is actually set. Be aware that CSR1-3
* can only be accessed when in CSR0 STOP is set.
*
* Return Value : Register contents
* Errors : None
* Globals : SK_RAM *board - SK_RAM structure pointer
* Update History :
* YY/MM/DD uid Description
-*/
int SK_rread_reg(void)
{
writeb(SK_RESET | SK_RDATA | SK_RREG, SK_PORT);
writeb(SK_DOIO, SK_IOCOM);
while (readb(SK_PORT) & SK_IORUN)
barrier();
return (readw(SK_IOREG));
} /* End of SK_rread_reg() */
/*-
* Function : SK_write_reg
* Author : Patrick J.D. Weichmann
* Date Created : 94/05/25
*
* Description : This function sets the RAP then fills in the
* LANCE I/O Reg and starts Transfer to LANCE.
* It waits until transfer has ended which is max. 7 ms
* and then it returns.
*
* Parameters : I : reg_number - which CSR to write to
* I : value - what value to fill into register
* Return Value : None
* Errors : None
* Globals : SK_RAM *board - SK_RAM structure pointer
* Update History :
* YY/MM/DD uid Description
-*/
void SK_write_reg(int reg_number, int value)
{
SK_set_RAP(reg_number);
writew(value, SK_IOREG);
writeb(SK_RESET | SK_RDATA | SK_WREG, SK_PORT);
writeb(SK_DOIO, SK_IOCOM);
while (readb(SK_PORT) & SK_IORUN)
barrier();
} /* End of SK_write_reg */
/*
* Debugging functions
* -------------------
*/
/*-
* Function : SK_print_pos
* Author : Patrick J.D. Weichmann
* Date Created : 94/05/25
*
* Description : This function prints out the 4 POS (Programmable
* Option Select) Registers. Used mainly to debug operation.
*
* Parameters : I : struct net_device *dev - SK_G16 device structure
* I : char * - Text which will be printed as title
* Return Value : None
* Errors : None
* Update History :
* YY/MM/DD uid Description
-*/
void SK_print_pos(struct net_device *dev, char *text)
{
int ioaddr = dev->base_addr;
unsigned char pos0 = inb(SK_POS0),
pos1 = inb(SK_POS1),
pos2 = inb(SK_POS2),
pos3 = inb(SK_POS3),
pos4 = inb(SK_POS4);
printk("## %s: %s.\n"
"## pos0=%#4x pos1=%#4x pos2=%#04x pos3=%#08x pos4=%#04x\n",
SK_NAME, text, pos0, pos1, pos2, (pos3<<14), pos4);
} /* End of SK_print_pos() */
/*-
* Function : SK_print_dev
* Author : Patrick J.D. Weichmann
* Date Created : 94/05/25
*
* Description : This function simply prints out the important fields
* of the device structure.
*
* Parameters : I : struct net_device *dev - SK_G16 device structure
* I : char *text - Title for printing
* Return Value : None
* Errors : None
* Update History :
* YY/MM/DD uid Description
-*/
void SK_print_dev(struct net_device *dev, char *text)
{
if (dev == NULL)
{
printk("## %s: Device Structure. %s\n", SK_NAME, text);
printk("## DEVICE == NULL\n");
}
else
{
printk("## %s: Device Structure. %s\n", SK_NAME, text);
printk("## Device Name: %s Base Address: %#06lx IRQ: %d\n",
dev->name, dev->base_addr, dev->irq);
printk("## next device: %#08x init function: %#08x\n",
(int) dev->next, (int) dev->init);
}
} /* End of SK_print_dev() */
/*-
* Function : SK_print_ram
* Author : Patrick J.D. Weichmann
* Date Created : 94/06/02
*
* Description : This function is used to check how are things set up
* in the 16KB RAM. Also the pointers to the receive and
* transmit descriptor rings and rx and tx buffers locations.
* It contains a minor bug in printing, but has no effect to the values
* only newlines are not correct.
*
* Parameters : I : struct net_device *dev - SK_G16 device structure
* Return Value : None
* Errors : None
* Globals : None
* Update History :
* YY/MM/DD uid Description
-*/
void __init SK_print_ram(struct net_device *dev)
{
int i;
struct priv *p = netdev_priv(dev);
printk("## %s: RAM Details.\n"
"## RAM at %#08x tmdhead: %#08x rmdhead: %#08x initblock: %#08x\n",
SK_NAME,
(unsigned int) p->ram,
(unsigned int) p->tmdhead,
(unsigned int) p->rmdhead,
(unsigned int) &(p->ram)->ib);
printk("## ");
for(i = 0; i < TMDNUM; i++)
{
if (!(i % 3)) /* Every third line do a newline */
{
printk("\n## ");
}
printk("tmdbufs%d: %#08x ", (i+1), (int) p->tmdbufs[i]);
}
printk("## ");
for(i = 0; i < RMDNUM; i++)
{
if (!(i % 3)) /* Every third line do a newline */
{
printk("\n## ");
}
printk("rmdbufs%d: %#08x ", (i+1), (int) p->rmdbufs[i]);
}
printk("\n");
} /* End of SK_print_ram() */
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