ibmtr_cs.c

linux-2.6.15.6

/*======================================================================

    A PCMCIA token-ring driver for IBM-based cards

    This driver supports the IBM PCMCIA Token-Ring Card.
    Written by Steve Kipisz, [e-mail] or
                             [e-mail]

    Written 1995,1996.

    This code is based on pcnet_cs.c from David Hinds.
    
    V2.2.0 February 1999 - Mike Phillips [e-mail]

    Linux V2.2.x presented significant changes to the underlying
    ibmtr.c code.  Mainly the code became a lot more organized and
    modular.

    This caused the old PCMCIA Token Ring driver to give up and go 
    home early. Instead of just patching the old code to make it 
    work, the PCMCIA code has been streamlined, updated and possibly
    improved.

    This code now only contains code required for the Card Services.
    All we do here is set the card up enough so that the real ibmtr.c
    driver can find it and work with it properly.

    i.e. We set up the io port, irq, mmio memory and shared ram
    memory.  This enables ibmtr_probe in ibmtr.c to find the card and
    configure it as though it was a normal ISA and/or PnP card.

    CHANGES

    v2.2.5 April 1999 Mike Phillips ([e-mail])
    Obscure bug fix, required changed to ibmtr.c not ibmtr_cs.c
    
    v2.2.7 May 1999 Mike Phillips ([e-mail])
    Updated to version 2.2.7 to match the first version of the kernel
    that the modification to ibmtr.c were incorporated into.
    
    v2.2.17 July 2000 Burt Silverman ([e-mail])
    Address translation feature of PCMCIA controller is usable so
    memory windows can be placed in High memory (meaning above
    0xFFFFF.)

======================================================================*/

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/module.h>
#include <linux/ethtool.h>
#include <linux/netdevice.h>
#include <linux/trdevice.h>
#include <linux/ibmtr.h>

#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/ds.h>

#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/system.h>

#define PCMCIA
#include "../tokenring/ibmtr.c"

#ifdef PCMCIA_DEBUG
static int pc_debug = PCMCIA_DEBUG;
module_param(pc_debug, int, 0);
#define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
static char *version =
"ibmtr_cs.c 1.10   1996/01/06 05:19:00 (Steve Kipisz)\n"
"           2.2.7  1999/05/03 12:00:00 (Mike Phillips)\n"
"           2.4.2  2001/30/28 Midnight (Burt Silverman)\n";
#else
#define DEBUG(n, args...)
#endif

/*====================================================================*/

/* Parameters that can be set with 'insmod' */

/* MMIO base address */
static u_long mmiobase = 0xce000;

/* SRAM base address */
static u_long srambase = 0xd0000;

/* SRAM size 8,16,32,64 */
static u_long sramsize = 64;

/* Ringspeed 4,16 */
static int ringspeed = 16;

module_param(mmiobase, ulong, 0);
module_param(srambase, ulong, 0);
module_param(sramsize, ulong, 0);
module_param(ringspeed, int, 0);
MODULE_LICENSE("GPL");

/*====================================================================*/

static void ibmtr_config(dev_link_t *link);
static void ibmtr_hw_setup(struct net_device *dev, u_int mmiobase);
static void ibmtr_release(dev_link_t *link);
static int ibmtr_event(event_t event, int priority,
                       event_callback_args_t *args);

static dev_info_t dev_info = "ibmtr_cs";

static dev_link_t *ibmtr_attach(void);
static void ibmtr_detach(dev_link_t *);

static dev_link_t *dev_list;

/*====================================================================*/

typedef struct ibmtr_dev_t {
    dev_link_t		link;
    struct net_device	*dev;
    dev_node_t          node;
    window_handle_t     sram_win_handle;
    struct tok_info	*ti;
} ibmtr_dev_t;

static void netdev_get_drvinfo(struct net_device *dev,
			       struct ethtool_drvinfo *info)
{
	strcpy(info->driver, "ibmtr_cs");
}

static struct ethtool_ops netdev_ethtool_ops = {
	.get_drvinfo		= netdev_get_drvinfo,
};

/*======================================================================

    ibmtr_attach() creates an "instance" of the driver, allocating
    local data structures for one device.  The device is registered
    with Card Services.

======================================================================*/

static dev_link_t *ibmtr_attach(void)
{
    ibmtr_dev_t *info;
    dev_link_t *link;
    struct net_device *dev;
    client_reg_t client_reg;
    int ret;
    
    DEBUG(0, "ibmtr_attach()\n");

    /* Create new token-ring device */
    info = kmalloc(sizeof(*info), GFP_KERNEL); 
    if (!info) return NULL;
    memset(info,0,sizeof(*info));
    dev = alloc_trdev(sizeof(struct tok_info));
    if (!dev) { 
	kfree(info); 
	return NULL;
    } 

    link = &info->link;
    link->priv = info;
    info->ti = netdev_priv(dev);

    link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
    link->io.NumPorts1 = 4;
    link->io.IOAddrLines = 16;
    link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
    link->irq.IRQInfo1 = IRQ_LEVEL_ID;
    link->irq.Handler = &tok_interrupt;
    link->conf.Attributes = CONF_ENABLE_IRQ;
    link->conf.Vcc = 50;
    link->conf.IntType = INT_MEMORY_AND_IO;
    link->conf.Present = PRESENT_OPTION;

    link->irq.Instance = info->dev = dev;
    
    SET_ETHTOOL_OPS(dev, &netdev_ethtool_ops);

    /* Register with Card Services */
    link->next = dev_list;
    dev_list = link;
    client_reg.dev_info = &dev_info;
    client_reg.Version = 0x0210;
    client_reg.event_callback_args.client_data = link;
    ret = pcmcia_register_client(&link->handle, &client_reg);
    if (ret != 0) {
        cs_error(link->handle, RegisterClient, ret);
	goto out_detach;
    }

out:
    return link;

out_detach:
    ibmtr_detach(link);
    link = NULL;
    goto out;
} /* ibmtr_attach */

/*======================================================================

    This deletes a driver "instance".  The device is de-registered
    with Card Services.  If it has been released, all local data
    structures are freed.  Otherwise, the structures will be freed
    when the device is released.

======================================================================*/

static void ibmtr_detach(dev_link_t *link)
{
    struct ibmtr_dev_t *info = link->priv;
    dev_link_t **linkp;
    struct net_device *dev;

    DEBUG(0, "ibmtr_detach(0x%p)\n", link);

    /* Locate device structure */
    for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
        if (*linkp == link) break;
    if (*linkp == NULL)
        return;

    dev = info->dev;

    if (link->dev)
	unregister_netdev(dev);

    {
	struct tok_info *ti = netdev_priv(dev);
	del_timer_sync(&(ti->tr_timer));
    }
    if (link->state & DEV_CONFIG)
        ibmtr_release(link);

    if (link->handle)
        pcmcia_deregister_client(link->handle);

    /* Unlink device structure, free bits */
    *linkp = link->next;
    free_netdev(dev);
    kfree(info); 
} /* ibmtr_detach */

/*======================================================================

    ibmtr_config() is scheduled to run after a CARD_INSERTION event
    is received, to configure the PCMCIA socket, and to make the
    token-ring device available to the system.

======================================================================*/

#define CS_CHECK(fn, ret) \
do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)

static void ibmtr_config(dev_link_t *link)
{
    client_handle_t handle = link->handle;
    ibmtr_dev_t *info = link->priv;
    struct net_device *dev = info->dev;