// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Driver for Sound Core PDAudioCF soundcard
 *
 * Copyright (c) 2003 by Jaroslav Kysela <perex@perex.cz>
 */

#include <sound/core.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <pcmcia/ciscode.h>
#include <pcmcia/cisreg.h>
#include "pdaudiocf.h"
#include <sound/initval.h>
#include <linux/init.h>

/*
 */

#define CARD_NAME       "PDAudio-CF"

MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
MODULE_DESCRIPTION("Sound Core " CARD_NAME);
MODULE_LICENSE("GPL");

static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;     /* Enable switches */

module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard.");

/*
 */

static struct snd_card *card_list[SNDRV_CARDS];

/*
 * prototypes
 */
static int pdacf_config(struct pcmcia_device *link);
static void snd_pdacf_detach(struct pcmcia_device *p_dev);

static void pdacf_release(struct pcmcia_device *link)
{
        free_irq(link->irq, link->priv);
        pcmcia_disable_device(link);
}

/*
 * destructor
 */
static int snd_pdacf_free(struct snd_pdacf *pdacf)
{
        struct pcmcia_device *link = pdacf->p_dev;

        pdacf_release(link);

        card_list[pdacf->index] = NULL;
        pdacf->card = NULL;

        kfree(pdacf);
        return 0;
}

static int snd_pdacf_dev_free(struct snd_device *device)
{
        struct snd_pdacf *chip = device->device_data;
        return snd_pdacf_free(chip);
}

/*
 * snd_pdacf_attach - attach callback for cs
 */
static int snd_pdacf_probe(struct pcmcia_device *link)
{
        int i, err;
        struct snd_pdacf *pdacf;
        struct snd_card *card;
        static const struct snd_device_ops ops = {
                .dev_free =     snd_pdacf_dev_free,
        };

        /* find an empty slot from the card list */
        for (i = 0; i < SNDRV_CARDS; i++) {
                if (! card_list[i])
                        break;
        }
        if (i >= SNDRV_CARDS) {
                dev_err(&link->dev, "pdacf: too many cards found\n");
                return -EINVAL;
        }
        if (! enable[i])
                return -ENODEV; /* disabled explicitly */

        /* ok, create a card instance */
        err = snd_card_new(&link->dev, index[i], id[i], THIS_MODULE,
                           0, &card);
        if (err < 0) {
                dev_err(&link->dev, "pdacf: cannot create a card instance\n");
                return err;
        }

        pdacf = snd_pdacf_create(card);
        if (!pdacf) {
                snd_card_free(card);
                return -ENOMEM;
        }

        err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, pdacf, &ops);
        if (err < 0) {
                kfree(pdacf);
                snd_card_free(card);
                return err;
        }

        pdacf->index = i;
        card_list[i] = card;

        pdacf->p_dev = link;
        link->priv = pdacf;

        link->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
        link->resource[0]->end = 16;

        link->config_flags = CONF_ENABLE_IRQ | CONF_ENABLE_PULSE_IRQ;
        link->config_index = 1;
        link->config_regs = PRESENT_OPTION;

        err = pdacf_config(link);
        if (err < 0) {
                card_list[i] = NULL;
                snd_card_free(card);
                return err;
        }
        return 0;
}


/**
 * snd_pdacf_assign_resources - initialize the hardware and card instance.
 * @pdacf: context
 * @port: i/o port for the card
 * @irq: irq number for the card
 *
 * this function assigns the specified port and irq, boot the card,
 * create pcm and control instances, and initialize the rest hardware.
 *
 * returns 0 if successful, or a negative error code.
 */
static int snd_pdacf_assign_resources(struct snd_pdacf *pdacf, int port, int irq)
{
        int err;
        struct snd_card *card = pdacf->card;

        dev_dbg(card->dev, "pdacf assign resources: port = 0x%x, irq = %d\n", port, irq);
        pdacf->port = port;
        pdacf->irq = irq;
        pdacf->chip_status |= PDAUDIOCF_STAT_IS_CONFIGURED;

        err = snd_pdacf_ak4117_create(pdacf);
        if (err < 0)
                return err;     

        strscpy(card->driver, "PDAudio-CF");
        sprintf(card->shortname, "Core Sound %s", card->driver);
        sprintf(card->longname, "%s at 0x%x, irq %i",
                card->shortname, port, irq);

        err = snd_pdacf_pcm_new(pdacf);
        if (err < 0)
                return err;

        err = snd_card_register(card);
        if (err < 0)
                return err;

        return 0;
}


/*
 * snd_pdacf_detach - detach callback for cs
 */
static void snd_pdacf_detach(struct pcmcia_device *link)
{
        struct snd_pdacf *chip = link->priv;

        if (chip->chip_status & PDAUDIOCF_STAT_IS_CONFIGURED)
                snd_pdacf_powerdown(chip);
        chip->chip_status |= PDAUDIOCF_STAT_IS_STALE; /* to be sure */
        snd_card_disconnect(chip->card);
        snd_card_free_when_closed(chip->card);
}

/*
 * configuration callback
 */

static int pdacf_config(struct pcmcia_device *link)
{
        struct snd_pdacf *pdacf = link->priv;
        int ret;

        link->config_index = 0x5;
        link->config_flags |= CONF_ENABLE_IRQ | CONF_ENABLE_PULSE_IRQ;

        ret = pcmcia_request_io(link);
        if (ret)
                goto failed_preirq;

        ret = request_threaded_irq(link->irq, pdacf_interrupt,
                                   pdacf_threaded_irq,
                                   IRQF_SHARED, link->devname, link->priv);
        if (ret)
                goto failed_preirq;

        ret = pcmcia_enable_device(link);
        if (ret)
                goto failed;

        if (snd_pdacf_assign_resources(pdacf, link->resource[0]->start,
                                        link->irq) < 0)
                goto failed;

        pdacf->card->sync_irq = link->irq;
        return 0;

 failed:
        free_irq(link->irq, link->priv);
failed_preirq:
        pcmcia_disable_device(link);
        return -ENODEV;
}

#ifdef CONFIG_PM

static int pdacf_suspend(struct pcmcia_device *link)
{
        struct snd_pdacf *chip = link->priv;

        if (chip)
                snd_pdacf_suspend(chip);

        return 0;
}

static int pdacf_resume(struct pcmcia_device *link)
{
        struct snd_pdacf *chip = link->priv;

        if (pcmcia_dev_present(link)) {
                if (chip)
                        snd_pdacf_resume(chip);
        }

        return 0;
}

#endif

/*
 * Module entry points
 */
static const struct pcmcia_device_id snd_pdacf_ids[] = {
        /* this is too general PCMCIA_DEVICE_MANF_CARD(0x015d, 0x4c45), */
        PCMCIA_DEVICE_PROD_ID12("Core Sound","PDAudio-CF",0x396d19d2,0x71717b49),
        PCMCIA_DEVICE_NULL
};
MODULE_DEVICE_TABLE(pcmcia, snd_pdacf_ids);

static struct pcmcia_driver pdacf_cs_driver = {
        .owner          = THIS_MODULE,
        .name           = "snd-pdaudiocf",
        .probe          = snd_pdacf_probe,
        .remove         = snd_pdacf_detach,
        .id_table       = snd_pdacf_ids,
#ifdef CONFIG_PM
        .suspend        = pdacf_suspend,
        .resume         = pdacf_resume,
#endif
};
module_pcmcia_driver(pdacf_cs_driver);