zdpci_pcmcia.c

zd1211b芯片的无线网卡的驱动,移植到s3c2410平台

#include <linux/version.h>

#ifdef MODVERSIONS
#include <linux/modversions.h>
#endif

#include <linux/module.h>


#include <linux/pci.h>
#include <pcmcia/driver_ops.h>

#include "zd1205.h"
#include "zddebug.h"
#include "zdpci_pcmcia.h"
#include "zdversion.h"

/******************************************************************************
        Global variable definition section
******************************************************************************/
MODULE_AUTHOR("Yarco Yang");
MODULE_DESCRIPTION("ZyDAS 802.11 Wireless LAN adapter");
MODULE_LICENSE("GPL");

extern struct net_device *g_dev;

struct driver_operations zdpci_ops =
{
    "zd1205", zdpci_attach, zdpci_suspend, zdpci_resume, zdpci_detach
};


/******************************************************************************
    Module initialization functions
******************************************************************************/
dev_node_t *zdpci_attach(dev_locator_t * loc)
{
    u32 io;
    u16 dev_id;
    u8 bus, devfn, irq, latency_tmr;
    struct pci_dev *pci_device;
    dev_node_t *node;
	struct zd1205_private *macp;

    // perform some initial setting checks
    if (loc->bus != LOC_PCI)
        return NULL;
        
    bus = loc->b.pci.bus;
    devfn = loc->b.pci.devfn;

    // get some pci settings for verification
    pcibios_read_config_dword(bus, devfn, PCI_BASE_ADDRESS_0, &io);
    pcibios_read_config_byte(bus, devfn, PCI_INTERRUPT_LINE, &irq);
    pcibios_read_config_word(bus, devfn, PCI_DEVICE_ID, &dev_id);

	// check whether the latency timer is set correctly
    pcibios_read_config_byte(bus, devfn, PCI_LATENCY_TIMER, &latency_tmr);

    if (io &= ~3, io == 0 || irq == 0)
    {
        printk(KERN_ERR "The interface was not assigned\n");
        return NULL;
    }
    
    // get pci device information by loading the pci_dev structure
    if (pci_device = pci_find_slot(bus, devfn), pci_device == NULL)
    {
        // error reading the pci device structure
        printk(KERN_ERR "ERROR: %s could not get PCI device "
            "information \n", DRIVER_NAME );   
        return NULL;
    }

    zd1205_found1(pci_device, NULL);


    // finally setup the node structure with the device information
    node = kmalloc(sizeof(dev_node_t), GFP_KERNEL);
    strcpy(node->dev_name, macp->device->name);
    node->major = 0;
    node->minor = 0;
    node->next = NULL;
    MOD_INC_USE_COUNT;
    return node;
}

void zdpci_suspend(dev_node_t * node)
{
 
}

void zdpci_resume(dev_node_t * node)
{
  
}

void zdpci_detach(dev_node_t * node)
{
    struct zd1205_private *macp = g_dev->priv;

    unregister_netdev(g_dev);
    zd1205_remove_proc_subdir(macp);
	zd1205_clear_structs(g_dev);
	//--zd1205nics;
	
    // free the node
    kfree(node);
    MOD_DEC_USE_COUNT;
}


int init_module(void)
{
    printk(KERN_NOTICE "%s - version %s\n",  DRIVER_NAME, VERSIONID);
    //register_driver(&zdpci_ops);
    register_pcmcia_driver();
   
    return 0;
}


void cleanup_module(void)
{
    unregister_driver(&zdpci_ops);
    
    printk(KERN_NOTICE "Unloaded %s \n",  DRIVER_NAME);
}