/*
 * Linux ARCnet driver - COM20020 PCI support
 * Contemporary Controls PCI20 and SOHARD SH-ARC PCI
 *
 * Written 1994-1999 by Avery Pennarun,
 *    based on an ISA version by David Woodhouse.
 * Written 1999-2000 by Martin Mares <mj@ucw.cz>.
 * Derived from skeleton.c by Donald Becker.
 *
 * Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
 *  for sponsoring the further development of this driver.
 *
 * **********************
 *
 * The original copyright of skeleton.c was as follows:
 *
 * skeleton.c Written 1993 by Donald Becker.
 * Copyright 1993 United States Government as represented by the
 * Director, National Security Agency.  This software may only be used
 * and distributed according to the terms of the GNU General Public License as
 * modified by SRC, incorporated herein by reference.
 *
 * **********************
 *
 * For more details, see drivers/net/arcnet.c
 *
 * **********************
 */

#define pr_fmt(fmt) "arcnet:" KBUILD_MODNAME ": " fmt

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/ioport.h>
#include <linux/errno.h>
#include <linux/netdevice.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/list.h>
#include <linux/io.h>
#include <linux/leds.h>

#include "arcdevice.h"
#include "com20020.h"

/* Module parameters */

static int node;
static char device[9];          /* use eg. device="arc1" to change name */
static int timeout = 3;
static int backplane;
static int clockp;
static int clockm;

module_param(node, int, 0);
module_param_string(device, device, sizeof(device), 0);
module_param(timeout, int, 0);
module_param(backplane, int, 0);
module_param(clockp, int, 0);
module_param(clockm, int, 0);
MODULE_DESCRIPTION("ARCnet COM20020 chipset PCI driver");
MODULE_LICENSE("GPL");

static void led_tx_set(struct led_classdev *led_cdev,
                             enum led_brightness value)
{
        struct com20020_dev *card;
        struct com20020_priv *priv;
        struct com20020_pci_card_info *ci;

        card = container_of(led_cdev, struct com20020_dev, tx_led);

        priv = card->pci_priv;
        ci = priv->ci;

        outb(!!value, priv->misc + ci->leds[card->index].green);
}

static void led_recon_set(struct led_classdev *led_cdev,
                             enum led_brightness value)
{
        struct com20020_dev *card;
        struct com20020_priv *priv;
        struct com20020_pci_card_info *ci;

        card = container_of(led_cdev, struct com20020_dev, recon_led);

        priv = card->pci_priv;
        ci = priv->ci;

        outb(!!value, priv->misc + ci->leds[card->index].red);
}

static ssize_t backplane_mode_show(struct device *dev,
                                   struct device_attribute *attr,
                                   char *buf)
{
        struct net_device *net_dev = to_net_dev(dev);
        struct arcnet_local *lp = netdev_priv(net_dev);

        return sprintf(buf, "%s\n", lp->backplane ? "true" : "false");
}
static DEVICE_ATTR_RO(backplane_mode);

static struct attribute *com20020_state_attrs[] = {
        &dev_attr_backplane_mode.attr,
        NULL,
};

static const struct attribute_group com20020_state_group = {
        .name = NULL,
        .attrs = com20020_state_attrs,
};

static struct com20020_pci_card_info card_info_2p5mbit;

static void com20020pci_remove(struct pci_dev *pdev);

static int com20020pci_probe(struct pci_dev *pdev,
                             const struct pci_device_id *id)
{
        struct com20020_pci_card_info *ci;
        struct com20020_pci_channel_map *mm;
        struct net_device *dev;
        struct arcnet_local *lp;
        struct com20020_priv *priv;
        int i, ioaddr, ret;
        struct resource *r;

        ret = 0;

        if (pci_enable_device(pdev))
                return -EIO;

        priv = devm_kzalloc(&pdev->dev, sizeof(struct com20020_priv),
                            GFP_KERNEL);
        if (!priv)
                return -ENOMEM;

        ci = (struct com20020_pci_card_info *)id->driver_data;
        if (!ci)
                ci = &card_info_2p5mbit;

        priv->ci = ci;
        mm = &ci->misc_map;

        pci_set_drvdata(pdev, priv);

        INIT_LIST_HEAD(&priv->list_dev);

        if (mm->size) {
                ioaddr = pci_resource_start(pdev, mm->bar) + mm->offset;
                r = devm_request_region(&pdev->dev, ioaddr, mm->size,
                                        "com20020-pci");
                if (!r) {
                        pr_err("IO region %xh-%xh already allocated.\n",
                               ioaddr, ioaddr + mm->size - 1);
                        return -EBUSY;
                }
                priv->misc = ioaddr;
        }

        for (i = 0; i < ci->devcount; i++) {
                struct com20020_pci_channel_map *cm = &ci->chan_map_tbl[i];
                struct com20020_dev *card;
                int dev_id_mask = 0xf;

                dev = alloc_arcdev(device);
                if (!dev) {
                        ret = -ENOMEM;
                        break;
                }
                dev->dev_port = i;

                dev->netdev_ops = &com20020_netdev_ops;

                lp = netdev_priv(dev);

                arc_printk(D_NORMAL, dev, "%s Controls\n", ci->name);
                ioaddr = pci_resource_start(pdev, cm->bar) + cm->offset;

                r = devm_request_region(&pdev->dev, ioaddr, cm->size,
                                        "com20020-pci");
                if (!r) {
                        pr_err("IO region %xh-%xh already allocated\n",
                               ioaddr, ioaddr + cm->size - 1);
                        ret = -EBUSY;
                        goto err_free_arcdev;
                }

                /* Dummy access after Reset
                 * ARCNET controller needs
                 * this access to detect bustype
                 */
                arcnet_outb(0x00, ioaddr, COM20020_REG_W_COMMAND);
                arcnet_inb(ioaddr, COM20020_REG_R_DIAGSTAT);

                SET_NETDEV_DEV(dev, &pdev->dev);
                dev->base_addr = ioaddr;
                arcnet_set_addr(dev, node);
                dev->sysfs_groups[0] = &com20020_state_group;
                dev->irq = pdev->irq;
                lp->card_name = "PCI COM20020";
                lp->card_flags = ci->flags;
                lp->backplane = backplane;
                lp->clockp = clockp & 7;
                lp->clockm = clockm & 3;
                lp->timeout = timeout;
                lp->hw.owner = THIS_MODULE;

                lp->backplane = (inb(priv->misc) >> (2 + i)) & 0x1;

                if (!strncmp(ci->name, "EAE PLX-PCI FB2", 15))
                        lp->backplane = 1;

                if (ci->flags & ARC_HAS_ROTARY) {
                        /* Get the dev_id from the PLX rotary coder */
                        if (!strncmp(ci->name, "EAE PLX-PCI MA1", 15))
                                dev_id_mask = 0x3;
                        dev->dev_id = (inb(priv->misc + ci->rotary) >> 4) & dev_id_mask;
                        snprintf(dev->name, sizeof(dev->name), "arc%d-%d", dev->dev_id, i);
                }

                if (arcnet_inb(ioaddr, COM20020_REG_R_STATUS) == 0xFF) {
                        pr_err("IO address %Xh is empty!\n", ioaddr);
                        ret = -EIO;
                        goto err_free_arcdev;
                }
                if (com20020_check(dev)) {
                        ret = -EIO;
                        goto err_free_arcdev;
                }

                ret = com20020_found(dev, IRQF_SHARED);
                if (ret)
                        goto err_free_arcdev;

                card = devm_kzalloc(&pdev->dev, sizeof(struct com20020_dev),
                                    GFP_KERNEL);
                if (!card) {
                        ret = -ENOMEM;
                        goto err_free_arcdev;
                }

                card->index = i;
                card->pci_priv = priv;

                if (ci->flags & ARC_HAS_LED) {
                        card->tx_led.brightness_set = led_tx_set;
                        card->tx_led.default_trigger = devm_kasprintf(&pdev->dev,
                                                        GFP_KERNEL, "arc%d-%d-tx",
                                                        dev->dev_id, i);
                        if (!card->tx_led.default_trigger) {
                                ret = -ENOMEM;
                                goto err_free_arcdev;
                        }
                        card->tx_led.name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
                                                        "pci:green:tx:%d-%d",
                                                        dev->dev_id, i);
                        if (!card->tx_led.name) {
                                ret = -ENOMEM;
                                goto err_free_arcdev;
                        }
                        card->tx_led.dev = &dev->dev;
                        card->recon_led.brightness_set = led_recon_set;
                        card->recon_led.default_trigger = devm_kasprintf(&pdev->dev,
                                                        GFP_KERNEL, "arc%d-%d-recon",
                                                        dev->dev_id, i);
                        if (!card->recon_led.default_trigger) {
                                ret = -ENOMEM;
                                goto err_free_arcdev;
                        }
                        card->recon_led.name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
                                                        "pci:red:recon:%d-%d",
                                                        dev->dev_id, i);
                        if (!card->recon_led.name) {
                                ret = -ENOMEM;
                                goto err_free_arcdev;
                        }
                        card->recon_led.dev = &dev->dev;

                        ret = devm_led_classdev_register(&pdev->dev, &card->tx_led);
                        if (ret)
                                goto err_free_arcdev;

                        ret = devm_led_classdev_register(&pdev->dev, &card->recon_led);
                        if (ret)
                                goto err_free_arcdev;

                        dev_set_drvdata(&dev->dev, card);
                        devm_arcnet_led_init(dev, dev->dev_id, i);
                }

                card->dev = dev;
                list_add(&card->list, &priv->list_dev);
                continue;

err_free_arcdev:
                free_arcdev(dev);
                break;
        }
        if (ret)
                com20020pci_remove(pdev);
        return ret;
}

static void com20020pci_remove(struct pci_dev *pdev)
{
        struct com20020_dev *card, *tmpcard;
        struct com20020_priv *priv;

        priv = pci_get_drvdata(pdev);

        list_for_each_entry_safe(card, tmpcard, &priv->list_dev, list) {
                struct net_device *dev = card->dev;

                unregister_netdev(dev);
                free_irq(dev->irq, dev);
                free_arcdev(dev);
        }
}

static struct com20020_pci_card_info card_info_10mbit = {
        .name = "ARC-PCI",
        .devcount = 1,
        .chan_map_tbl = {
                {
                        .bar = 2,
                        .offset = 0x00,
                        .size = 0x08,
                },
        },
        .flags = ARC_CAN_10MBIT,
};

static struct com20020_pci_card_info card_info_5mbit = {
        .name = "ARC-PCI",
        .devcount = 1,
        .chan_map_tbl = {
                {
                        .bar = 2,
                        .offset = 0x00,
                        .size = 0x08,
                },
        },
        .flags = ARC_IS_5MBIT,
};

static struct com20020_pci_card_info card_info_2p5mbit = {
        .name = "ARC-PCI",
        .devcount = 1,
        .chan_map_tbl = {
                {
                        .bar = 2,
                        .offset = 0x00,
                        .size = 0x08,
                },
        },
};

static struct com20020_pci_card_info card_info_sohard = {
        .name = "SOHARD SH ARC-PCI",
        .devcount = 1,
        /* SOHARD needs PCI base addr 4 */
        .chan_map_tbl = {
                {
                        .bar = 4,
                        .offset = 0x00,
                        .size = 0x08
                },
        },
        .flags = ARC_CAN_10MBIT,
};

static struct com20020_pci_card_info card_info_eae_arc1 = {
        .name = "EAE PLX-PCI ARC1",
        .devcount = 1,
        .chan_map_tbl = {
                {
                        .bar = 2,
                        .offset = 0x00,
                        .size = 0x08,
                },
        },
        .misc_map = {
                .bar = 2,
                .offset = 0x10,
                .size = 0x04,
        },
        .leds = {
                {
                        .green = 0x0,
                        .red = 0x1,
                },
        },
        .rotary = 0x0,
        .flags = ARC_HAS_ROTARY | ARC_HAS_LED | ARC_CAN_10MBIT,
};

static struct com20020_pci_card_info card_info_eae_ma1 = {
        .name = "EAE PLX-PCI MA1",
        .devcount = 2,
        .chan_map_tbl = {
                {
                        .bar = 2,
                        .offset = 0x00,
                        .size = 0x08,
                }, {
                        .bar = 2,
                        .offset = 0x08,
                        .size = 0x08,
                }
        },
        .misc_map = {
                .bar = 2,
                .offset = 0x10,
                .size = 0x04,
        },
        .leds = {
                {
                        .green = 0x0,
                        .red = 0x1,
                }, {
                        .green = 0x2,
                        .red = 0x3,
                },
        },
        .rotary = 0x0,
        .flags = ARC_HAS_ROTARY | ARC_HAS_LED | ARC_CAN_10MBIT,
};

static struct com20020_pci_card_info card_info_eae_fb2 = {
        .name = "EAE PLX-PCI FB2",
        .devcount = 1,
        .chan_map_tbl = {
                {
                        .bar = 2,
                        .offset = 0x00,
                        .size = 0x08,
                },
        },
        .misc_map = {
                .bar = 2,
                .offset = 0x10,
                .size = 0x04,
        },
        .leds = {
                {
                        .green = 0x0,
                        .red = 0x1,
                },
        },
        .rotary = 0x0,
        .flags = ARC_HAS_ROTARY | ARC_HAS_LED | ARC_CAN_10MBIT,
};

static const struct pci_device_id com20020pci_id_table[] = {
        {
                0x1571, 0xa001,
                PCI_ANY_ID, PCI_ANY_ID,
                0, 0,
                0,
        },
        {
                0x1571, 0xa002,
                PCI_ANY_ID, PCI_ANY_ID,
                0, 0,
                0,
        },
        {
                0x1571, 0xa003,
                PCI_ANY_ID, PCI_ANY_ID,
                0, 0,
                0
        },
        {
                0x1571, 0xa004,
                PCI_ANY_ID, PCI_ANY_ID,
                0, 0,
                0,
        },
        {
                0x1571, 0xa005,
                PCI_ANY_ID, PCI_ANY_ID,
                0, 0,
                0
        },
        {
                0x1571, 0xa006,
                PCI_ANY_ID, PCI_ANY_ID,
                0, 0,
                0
        },
        {
                0x1571, 0xa007,
                PCI_ANY_ID, PCI_ANY_ID,
                0, 0,
                0
        },
        {
                0x1571, 0xa008,
                PCI_ANY_ID, PCI_ANY_ID,
                0, 0,
                0
        },
        {
                0x1571, 0xa009,
                PCI_ANY_ID, PCI_ANY_ID,
                0, 0,
                (kernel_ulong_t)&card_info_5mbit
        },
        {
                0x1571, 0xa00a,
                PCI_ANY_ID, PCI_ANY_ID,
                0, 0,
                (kernel_ulong_t)&card_info_5mbit
        },
        {
                0x1571, 0xa00b,
                PCI_ANY_ID, PCI_ANY_ID,
                0, 0,
                (kernel_ulong_t)&card_info_5mbit
        },
        {
                0x1571, 0xa00c,
                PCI_ANY_ID, PCI_ANY_ID,
                0, 0,
                (kernel_ulong_t)&card_info_5mbit
        },
        {
                0x1571, 0xa00d,
                PCI_ANY_ID, PCI_ANY_ID,
                0, 0,
                (kernel_ulong_t)&card_info_5mbit
        },
        {
                0x1571, 0xa00e,
                PCI_ANY_ID, PCI_ANY_ID,
                0, 0,
                (kernel_ulong_t)&card_info_5mbit
        },
        {
                0x1571, 0xa201,
                PCI_ANY_ID, PCI_ANY_ID,
                0, 0,
                (kernel_ulong_t)&card_info_10mbit
        },
        {
                0x1571, 0xa202,
                PCI_ANY_ID, PCI_ANY_ID,
                0, 0,
                (kernel_ulong_t)&card_info_10mbit
        },
        {
                0x1571, 0xa203,
                PCI_ANY_ID, PCI_ANY_ID,
                0, 0,
                (kernel_ulong_t)&card_info_10mbit
        },
        {
                0x1571, 0xa204,
                PCI_ANY_ID, PCI_ANY_ID,
                0, 0,
                (kernel_ulong_t)&card_info_10mbit
        },
        {
                0x1571, 0xa205,
                PCI_ANY_ID, PCI_ANY_ID,
                0, 0,
                (kernel_ulong_t)&card_info_10mbit
        },
        {
                0x1571, 0xa206,
                PCI_ANY_ID, PCI_ANY_ID,
                0, 0,
                (kernel_ulong_t)&card_info_10mbit
        },
        {
                0x10B5, 0x9030,
                0x10B5, 0x2978,
                0, 0,
                (kernel_ulong_t)&card_info_sohard
        },
        {
                0x10B5, 0x9050,
                0x10B5, 0x2273,
                0, 0,
                (kernel_ulong_t)&card_info_sohard
        },
        {
                0x10B5, 0x9050,
                0x10B5, 0x3263,
                0, 0,
                (kernel_ulong_t)&card_info_eae_arc1
        },
        {
                0x10B5, 0x9050,
                0x10B5, 0x3292,
                0, 0,
                (kernel_ulong_t)&card_info_eae_ma1
        },
        {
                0x10B5, 0x9050,
                0x10B5, 0x3294,
                0, 0,
                (kernel_ulong_t)&card_info_eae_fb2
        },
        {
                0x14BA, 0x6000,
                PCI_ANY_ID, PCI_ANY_ID,
                0, 0,
                (kernel_ulong_t)&card_info_10mbit
        },
        {
                0x10B5, 0x2200,
                PCI_ANY_ID, PCI_ANY_ID,
                0, 0,
                (kernel_ulong_t)&card_info_10mbit
        },
        { 0, }
};

MODULE_DEVICE_TABLE(pci, com20020pci_id_table);

static struct pci_driver com20020pci_driver = {
        .name           = "com20020",
        .id_table       = com20020pci_id_table,
        .probe          = com20020pci_probe,
        .remove         = com20020pci_remove,
};

module_pci_driver(com20020pci_driver);