/* orinoco_tmd.c
 *
 * Driver for Prism II devices which would usually be driven by orinoco_cs,
 * but are connected to the PCI bus by a TMD7160.
 *
 * Copyright (C) 2003 Joerg Dorchain <joerg AT dorchain.net>
 * based heavily upon orinoco_plx.c Copyright (C) 2001 Daniel Barlow
 *
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.1 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License
 * at http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and
 * limitations under the License.
 *
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU General Public License version 2 (the "GPL"), in
 * which case the provisions of the GPL are applicable instead of the
 * above.  If you wish to allow the use of your version of this file
 * only under the terms of the GPL and not to allow others to use your
 * version of this file under the MPL, indicate your decision by
 * deleting the provisions above and replace them with the notice and
 * other provisions required by the GPL.  If you do not delete the
 * provisions above, a recipient may use your version of this file
 * under either the MPL or the GPL.
 *
 * The actual driving is done by main.c, this is just resource
 * allocation stuff.
 *
 * This driver is modeled after the orinoco_plx driver. The main
 * difference is that the TMD chip has only IO port ranges and doesn't
 * provide access to the PCMCIA attribute space.
 *
 * Pheecom sells cards with the TMD chip as "ASIC version"
 */

#define DRIVER_NAME "orinoco_tmd"
#define PFX DRIVER_NAME ": "

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <pcmcia/cisreg.h>

#include "orinoco.h"
#include "orinoco_pci.h"

#define COR_VALUE       (COR_LEVEL_REQ | COR_FUNC_ENA) /* Enable PC card with interrupt in level trigger */
#define COR_RESET     (0x80)    /* reset bit in the COR register */
#define TMD_RESET_TIME  (500)   /* milliseconds */

/*
 * Do a soft reset of the card using the Configuration Option Register
 */
static int orinoco_tmd_cor_reset(struct orinoco_private *priv)
{
        struct hermes *hw = &priv->hw;
        struct orinoco_pci_card *card = priv->card;
        unsigned long timeout;
        u16 reg;

        iowrite8(COR_VALUE | COR_RESET, card->bridge_io);
        mdelay(1);

        iowrite8(COR_VALUE, card->bridge_io);
        mdelay(1);

        /* Just in case, wait more until the card is no longer busy */
        timeout = jiffies + msecs_to_jiffies(TMD_RESET_TIME);
        reg = hermes_read_regn(hw, CMD);
        while (time_before(jiffies, timeout) && (reg & HERMES_CMD_BUSY)) {
                mdelay(1);
                reg = hermes_read_regn(hw, CMD);
        }

        /* Still busy? */
        if (reg & HERMES_CMD_BUSY) {
                printk(KERN_ERR PFX "Busy timeout\n");
                return -ETIMEDOUT;
        }

        return 0;
}


static int orinoco_tmd_init_one(struct pci_dev *pdev,
                                const struct pci_device_id *ent)
{
        int err;
        struct orinoco_private *priv;
        struct orinoco_pci_card *card;
        void __iomem *hermes_io, *bridge_io;

        err = pci_enable_device(pdev);
        if (err) {
                printk(KERN_ERR PFX "Cannot enable PCI device\n");
                return err;
        }

        err = pci_request_regions(pdev, DRIVER_NAME);
        if (err) {
                printk(KERN_ERR PFX "Cannot obtain PCI resources\n");
                goto fail_resources;
        }

        bridge_io = pci_iomap(pdev, 1, 0);
        if (!bridge_io) {
                printk(KERN_ERR PFX "Cannot map bridge registers\n");
                err = -EIO;
                goto fail_map_bridge;
        }

        hermes_io = pci_iomap(pdev, 2, 0);
        if (!hermes_io) {
                printk(KERN_ERR PFX "Cannot map chipset registers\n");
                err = -EIO;
                goto fail_map_hermes;
        }

        /* Allocate network device */
        priv = alloc_orinocodev(sizeof(*card), &pdev->dev,
                                orinoco_tmd_cor_reset, NULL);
        if (!priv) {
                printk(KERN_ERR PFX "Cannot allocate network device\n");
                err = -ENOMEM;
                goto fail_alloc;
        }

        card = priv->card;
        card->bridge_io = bridge_io;

        hermes_struct_init(&priv->hw, hermes_io, HERMES_16BIT_REGSPACING);

        err = request_irq(pdev->irq, orinoco_interrupt, IRQF_SHARED,
                          DRIVER_NAME, priv);
        if (err) {
                printk(KERN_ERR PFX "Cannot allocate IRQ %d\n", pdev->irq);
                err = -EBUSY;
                goto fail_irq;
        }

        err = orinoco_tmd_cor_reset(priv);
        if (err) {
                printk(KERN_ERR PFX "Initial reset failed\n");
                goto fail;
        }

        err = orinoco_init(priv);
        if (err) {
                printk(KERN_ERR PFX "orinoco_init() failed\n");
                goto fail;
        }

        err = orinoco_if_add(priv, 0, 0, NULL);
        if (err) {
                printk(KERN_ERR PFX "orinoco_if_add() failed\n");
                goto fail;
        }

        pci_set_drvdata(pdev, priv);

        return 0;

 fail:
        free_irq(pdev->irq, priv);

 fail_irq:
        free_orinocodev(priv);

 fail_alloc:
        pci_iounmap(pdev, hermes_io);

 fail_map_hermes:
        pci_iounmap(pdev, bridge_io);

 fail_map_bridge:
        pci_release_regions(pdev);

 fail_resources:
        pci_disable_device(pdev);

        return err;
}

static void orinoco_tmd_remove_one(struct pci_dev *pdev)
{
        struct orinoco_private *priv = pci_get_drvdata(pdev);
        struct orinoco_pci_card *card = priv->card;

        orinoco_if_del(priv);
        free_irq(pdev->irq, priv);
        free_orinocodev(priv);
        pci_iounmap(pdev, priv->hw.iobase);
        pci_iounmap(pdev, card->bridge_io);
        pci_release_regions(pdev);
        pci_disable_device(pdev);
}

static const struct pci_device_id orinoco_tmd_id_table[] = {
        {0x15e8, 0x0131, PCI_ANY_ID, PCI_ANY_ID,},      /* NDC and OEMs, e.g. pheecom */
        {0,},
};

MODULE_DEVICE_TABLE(pci, orinoco_tmd_id_table);

static struct pci_driver orinoco_tmd_driver = {
        .name           = DRIVER_NAME,
        .id_table       = orinoco_tmd_id_table,
        .probe          = orinoco_tmd_init_one,
        .remove         = orinoco_tmd_remove_one,
        .driver.pm      = &orinoco_pci_pm_ops,
};

static char version[] __initdata = DRIVER_NAME " " DRIVER_VERSION
        " (Joerg Dorchain <joerg@dorchain.net>)";
MODULE_AUTHOR("Joerg Dorchain <joerg@dorchain.net>");
MODULE_DESCRIPTION("Driver for wireless LAN cards using the TMD7160 PCI bridge");
MODULE_LICENSE("Dual MPL/GPL");

static int __init orinoco_tmd_init(void)
{
        printk(KERN_DEBUG "%s\n", version);
        return pci_register_driver(&orinoco_tmd_driver);
}

static void __exit orinoco_tmd_exit(void)
{
        pci_unregister_driver(&orinoco_tmd_driver);
}

module_init(orinoco_tmd_init);
module_exit(orinoco_tmd_exit);