// SPDX-License-Identifier: GPL-2.0
/*
 * IPWireless 3G PCMCIA Network Driver
 *
 * Original code
 *   by Stephen Blackheath <stephen@blacksapphire.com>,
 *      Ben Martel <benm@symmetric.co.nz>
 *
 * 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 (!ipw->common_memory) {
                ret = -ENOMEM;
                goto exit1;
        }
        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 (!ipw->attr_memory) {
                ret = -ENOMEM;
                goto exit3;
        }
        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_obj(struct ipw_dev);
        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");