main.c

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/*
 * IPWireless 3G PCMCIA Network Driver
 *
 * Original code
 *   by Stephen Blackheath <[email protected]>,
 *      Ben Martel <[email protected]>
 *
 * Copyrighted as follows:
 *   Copyright (C) 2004 by Symmetric Systems Ltd (NZ)
 *
 * Various driver changes and rewrites, port to new kernels
 *   Copyright (C) 2006-2007 Jiri Kosina
 *
 * Misc code cleanups and updates
 *   Copyright (C) 2007 David Sterba
 */

#include "hardware.h"
#include "network.h"
#include "main.h"
#include "tty.h"

#include <linux/delay.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/slab.h>

#include <pcmcia/cisreg.h>
#include <pcmcia/device_id.h>
#include <pcmcia/ss.h>
#include <pcmcia/ds.h>

static const struct pcmcia_device_id ipw_ids[] = {
    PCMCIA_DEVICE_MANF_CARD(0x02f2, 0x0100),
    PCMCIA_DEVICE_MANF_CARD(0x02f2, 0x0200),
    PCMCIA_DEVICE_NULL
};
MODULE_DEVICE_TABLE(pcmcia, ipw_ids);

static void ipwireless_detach(struct pcmcia_device *link);

/*
 * Module params
 */
/* Debug mode: more verbose, print sent/recv bytes */
int ipwireless_debug;
int ipwireless_loopback;
int ipwireless_out_queue = 10;

module_param_named(debug, ipwireless_debug, int, 0);
module_param_named(loopback, ipwireless_loopback, int, 0);
module_param_named(out_queue, ipwireless_out_queue, int, 0);
MODULE_PARM_DESC(debug, "switch on debug messages [0]");
MODULE_PARM_DESC(loopback,
        "debug: enable ras_raw channel [0]");
MODULE_PARM_DESC(out_queue, "debug: set size of outgoing PPP queue [10]");

/* Executes in process context. */
static void signalled_reboot_work(struct work_struct *work_reboot)
{
    struct ipw_dev *ipw = container_of(work_reboot, struct ipw_dev,
            work_reboot);
    struct pcmcia_device *link = ipw->link;
    pcmcia_reset_card(link->socket);
}

static void signalled_reboot_callback(void *callback_data)
{
    struct ipw_dev *ipw = (struct ipw_dev *) callback_data;

    /* Delegate to process context. */
    schedule_work(&ipw->work_reboot);
}

static int ipwireless_probe(struct pcmcia_device *p_dev, void *priv_data)
{
    struct ipw_dev *ipw = priv_data;
    int ret;

    p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
    p_dev->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;

    /* 0x40 causes it to generate level mode interrupts. */
    /* 0x04 enables IREQ pin. */
    p_dev->config_index |= 0x44;
    p_dev->io_lines = 16;
    ret = pcmcia_request_io(p_dev);
    if (ret)
        return ret;

    if (!request_region(p_dev->resource[0]->start,
                resource_size(p_dev->resource[0]),
                IPWIRELESS_PCCARD_NAME)) {
        ret = -EBUSY;
        goto exit;
    }

    p_dev->resource[2]->flags |=
        WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_CM | WIN_ENABLE;

    ret = pcmcia_request_window(p_dev, p_dev->resource[2], 0);
    if (ret != 0)
        goto exit1;

    ret = pcmcia_map_mem_page(p_dev, p_dev->resource[2], p_dev->card_addr);
    if (ret != 0)
        goto exit1;

    ipw->is_v2_card = resource_size(p_dev->resource[2]) == 0x100;

    ipw->common_memory = ioremap(p_dev->resource[2]->start,
                resource_size(p_dev->resource[2]));
    if (!request_mem_region(p_dev->resource[2]->start,
                resource_size(p_dev->resource[2]),
                IPWIRELESS_PCCARD_NAME)) {
        ret = -EBUSY;
        goto exit2;
    }

    p_dev->resource[3]->flags |= WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_AM |
                    WIN_ENABLE;
    p_dev->resource[3]->end = 0; /* this used to be 0x1000 */
    ret = pcmcia_request_window(p_dev, p_dev->resource[3], 0);
    if (ret != 0)
        goto exit3;

    ret = pcmcia_map_mem_page(p_dev, p_dev->resource[3], 0);
    if (ret != 0)
        goto exit3;

    ipw->attr_memory = ioremap(p_dev->resource[3]->start,
                resource_size(p_dev->resource[3]));
    if (!request_mem_region(p_dev->resource[3]->start,
                resource_size(p_dev->resource[3]),
                IPWIRELESS_PCCARD_NAME)) {
        ret = -EBUSY;
        goto exit4;
    }

    return 0;

exit4:
    iounmap(ipw->attr_memory);
exit3:
    release_mem_region(p_dev->resource[2]->start,
            resource_size(p_dev->resource[2]));
exit2:
    iounmap(ipw->common_memory);
exit1:
    release_region(p_dev->resource[0]->start,
               resource_size(p_dev->resource[0]));
exit:
    pcmcia_disable_device(p_dev);
    return ret;
}

static int config_ipwireless(struct ipw_dev *ipw)
{
    struct pcmcia_device *link = ipw->link;
    int ret = 0;

    ipw->is_v2_card = 0;
    link->config_flags |= CONF_AUTO_SET_IO | CONF_AUTO_SET_IOMEM |
        CONF_ENABLE_IRQ;

    ret = pcmcia_loop_config(link, ipwireless_probe, ipw);
    if (ret != 0)
        return ret;

    INIT_WORK(&ipw->work_reboot, signalled_reboot_work);

    ipwireless_init_hardware_v1(ipw->hardware, link->resource[0]->start,
                    ipw->attr_memory, ipw->common_memory,
                    ipw->is_v2_card, signalled_reboot_callback,
                    ipw);

    ret = pcmcia_request_irq(link, ipwireless_interrupt);
    if (ret != 0)
        goto exit;

    printk(KERN_INFO IPWIRELESS_PCCARD_NAME ": Card type %s\n",
            ipw->is_v2_card ? "V2/V3" : "V1");
    printk(KERN_INFO IPWIRELESS_PCCARD_NAME
        ": I/O ports %pR, irq %d\n", link->resource[0],
            (unsigned int) link->irq);
    if (ipw->attr_memory && ipw->common_memory)
        printk(KERN_INFO IPWIRELESS_PCCARD_NAME
            ": attr memory %pR, common memory %pR\n",
            link->resource[3],
            link->resource[2]);

    ipw->network = ipwireless_network_create(ipw->hardware);
    if (!ipw->network)
        goto exit;

    ipw->tty = ipwireless_tty_create(ipw->hardware, ipw->network);
    if (!ipw->tty)
        goto exit;

    ipwireless_init_hardware_v2_v3(ipw->hardware);

    /*
     * Do the RequestConfiguration last, because it enables interrupts.
     * Then we don't get any interrupts before we're ready for them.
     */
    ret = pcmcia_enable_device(link);
    if (ret != 0)
        goto exit;

    return 0;

exit:
    if (ipw->common_memory) {
        release_mem_region(link->resource[2]->start,
                resource_size(link->resource[2]));
        iounmap(ipw->common_memory);
    }
    if (ipw->attr_memory) {
        release_mem_region(link->resource[3]->start,
                resource_size(link->resource[3]));
        iounmap(ipw->attr_memory);
    }
    pcmcia_disable_device(link);
    return -1;
}

static void release_ipwireless(struct ipw_dev *ipw)
{
    release_region(ipw->link->resource[0]->start,
               resource_size(ipw->link->resource[0]));
    if (ipw->common_memory) {
        release_mem_region(ipw->link->resource[2]->start,
                resource_size(ipw->link->resource[2]));
        iounmap(ipw->common_memory);
    }
    if (ipw->attr_memory) {
        release_mem_region(ipw->link->resource[3]->start,
                resource_size(ipw->link->resource[3]));
        iounmap(ipw->attr_memory);
    }
    pcmcia_disable_device(ipw->link);
}

/*
 * ipwireless_attach() creates an "instance" of the driver, allocating
 * local data structures for one device (one interface).  The device
 * is registered with Card Services.
 *
 * The pcmcia_device structure is initialized, but we don't actually
 * configure the card at this point -- we wait until we receive a
 * card insertion event.
 */
static int ipwireless_attach(struct pcmcia_device *link)
{
    struct ipw_dev *ipw;
    int ret;

    ipw = kzalloc(sizeof(struct ipw_dev), GFP_KERNEL);
    if (!ipw)
        return -ENOMEM;

    ipw->link = link;
    link->priv = ipw;

    ipw->hardware = ipwireless_hardware_create();
    if (!ipw->hardware) {
        kfree(ipw);
        return -ENOMEM;
    }
    /* RegisterClient will call config_ipwireless */

    ret = config_ipwireless(ipw);

    if (ret != 0) {
        ipwireless_detach(link);
        return ret;
    }

    return 0;
}

/*
 * 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 ipwireless_detach(struct pcmcia_device *link)
{
    struct ipw_dev *ipw = link->priv;

    release_ipwireless(ipw);

    if (ipw->tty != NULL)
        ipwireless_tty_free(ipw->tty);
    if (ipw->network != NULL)
        ipwireless_network_free(ipw->network);
    if (ipw->hardware != NULL)
        ipwireless_hardware_free(ipw->hardware);
    kfree(ipw);
}

static struct pcmcia_driver me = {
    .owner      = THIS_MODULE,
    .probe          = ipwireless_attach,
    .remove         = ipwireless_detach,
    .name       = IPWIRELESS_PCCARD_NAME,
    .id_table       = ipw_ids
};

/*
 * Module insertion : initialisation of the module.
 * Register the card with cardmgr...
 */
static int __init init_ipwireless(void)
{
    int ret;

    ret = ipwireless_tty_init();
    if (ret != 0)
        return ret;

    ret = pcmcia_register_driver(&me);
    if (ret != 0)
        ipwireless_tty_release();

    return ret;
}

/*
 * Module removal
 */
static void __exit exit_ipwireless(void)
{
    pcmcia_unregister_driver(&me);
    ipwireless_tty_release();
}

module_init(init_ipwireless);
module_exit(exit_ipwireless);

MODULE_AUTHOR(IPWIRELESS_PCMCIA_AUTHOR);
MODULE_DESCRIPTION(IPWIRELESS_PCCARD_NAME " " IPWIRELESS_PCMCIA_VERSION);
MODULE_LICENSE("GPL");