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vx_entry.c

/*
 * Driver for Digigram VXpocket soundcards
 *
 * PCMCIA entry part
 *
 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */

#include <sound/driver.h>
#include <sound/core.h>
#include "vxpocket.h"
#include <pcmcia/ciscode.h>
#include <pcmcia/cisreg.h>


MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
MODULE_DESCRIPTION("Common routines for Digigram PCMCIA VX drivers");
MODULE_LICENSE("GPL");

/*
 * prototypes
 */
static void vxpocket_config(dev_link_t *link);
static int vxpocket_event(event_t event, int priority, event_callback_args_t *args);


static void vxpocket_release(dev_link_t *link)
{
      if (link->state & DEV_CONFIG) {
            /* release cs resources */
            pcmcia_release_configuration(link->handle);
            pcmcia_release_io(link->handle, &link->io);
            pcmcia_release_irq(link->handle, &link->irq);
            link->state &= ~DEV_CONFIG;
      }
}

/*
 * destructor
 */
static int snd_vxpocket_free(vx_core_t *chip)
{
      struct snd_vxpocket *vxp = (struct snd_vxpocket *)chip;
      struct snd_vxp_entry *hw;
      dev_link_t *link = &vxp->link;

      vxpocket_release(link);

      /* Break the link with Card Services */
      if (link->handle)
            pcmcia_deregister_client(link->handle);

      hw = vxp->hw_entry;
      if (hw)
            hw->card_list[vxp->index] = NULL;
      chip->card = NULL;
      if (chip->dev)
            kfree(chip->dev);

      snd_vx_free_firmware(chip);
      kfree(chip);
      return 0;
}

static int snd_vxpocket_dev_free(snd_device_t *device)
{
      vx_core_t *chip = device->device_data;
      return snd_vxpocket_free(chip);
}

/*
 * snd_vxpocket_attach - attach callback for cs
 * @hw: the hardware information
 */
dev_link_t *snd_vxpocket_attach(struct snd_vxp_entry *hw)
{
      client_reg_t client_reg;      /* Register with cardmgr */
      dev_link_t *link;       /* Info for cardmgr */
      int i, ret;
      vx_core_t *chip;
      struct snd_vxpocket *vxp;
      snd_card_t *card;
      static snd_device_ops_t ops = {
            .dev_free = snd_vxpocket_dev_free,
      };

      snd_printdd(KERN_DEBUG "vxpocket_attach called\n");
      /* find an empty slot from the card list */
      for (i = 0; i < SNDRV_CARDS; i++) {
            if (! hw->card_list[i])
                  break;
      }
      if (i >= SNDRV_CARDS) {
            snd_printk(KERN_ERR "vxpocket: too many cards found\n");
            return NULL;
      }
      if (! hw->enable_table[i])
            return NULL; /* disabled explicitly */

      /* ok, create a card instance */
      card = snd_card_new(hw->index_table[i], hw->id_table[i], THIS_MODULE, 0);
      if (card == NULL) {
            snd_printk(KERN_ERR "vxpocket: cannot create a card instance\n");
            return NULL;
      }

      chip = snd_vx_create(card, hw->hardware, hw->ops,
                       sizeof(struct snd_vxpocket) - sizeof(vx_core_t));
      if (! chip)
            return NULL;

#ifdef SND_VX_FW_LOADER
      /* fake a device here since pcmcia doesn't give a valid device... */
      chip->dev = kcalloc(1, sizeof(*chip->dev), GFP_KERNEL);
      if (! chip->dev) {
            snd_printk(KERN_ERR "vxp: can't malloc chip->dev\n");
            kfree(chip);
            snd_card_free(card);
            return NULL;
      }
      device_initialize(chip->dev);
      sprintf(chip->dev->bus_id, "vxpocket%d", i);
#endif

      if (snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops) < 0) {
            kfree(chip);
            snd_card_free(card);
            return NULL;
      }

      vxp = (struct snd_vxpocket *)chip;
      vxp->index = i;
      vxp->hw_entry = hw;
      chip->ibl.size = hw->ibl[i];
      hw->card_list[i] = chip;

      link = &vxp->link;
      link->priv = chip;

      link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
      link->io.NumPorts1 = 16;

      link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
      // link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED;

      link->irq.IRQInfo1 = IRQ_INFO2_VALID | IRQ_LEVEL_ID;
      if (hw->irq_list[0] == -1)
            link->irq.IRQInfo2 = *hw->irq_mask_p;
      else
            for (i = 0; i < 4; i++)
                  link->irq.IRQInfo2 |= 1 << hw->irq_list[i];
      link->irq.Handler = &snd_vx_irq_handler;
      link->irq.Instance = chip;

      link->conf.Attributes = CONF_ENABLE_IRQ;
      link->conf.Vcc = 50;
      link->conf.IntType = INT_MEMORY_AND_IO;
      link->conf.ConfigIndex = 1;
      link->conf.Present = PRESENT_OPTION;

      /* Register with Card Services */
      memset(&client_reg, 0, sizeof(client_reg));
      client_reg.dev_info = hw->dev_info;
      client_reg.Attributes = INFO_IO_CLIENT | INFO_CARD_SHARE;
      client_reg.EventMask = 
            CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL
#ifdef CONFIG_PM
            | CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET
            | CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME
#endif
            ;
      client_reg.event_handler = &vxpocket_event;
      client_reg.Version = 0x0210;
      client_reg.event_callback_args.client_data = link;

      ret = pcmcia_register_client(&link->handle, &client_reg);
      if (ret != CS_SUCCESS) {
            cs_error(link->handle, RegisterClient, ret);
            snd_card_free(card);
            return NULL;
      }

      /* Chain drivers */
      link->next = hw->dev_list;
      hw->dev_list = link;

      /* snd_card_set_pm_callback(card, snd_vxpocket_suspend, snd_vxpocket_resume, chip); */

      return link;
}


/**
 * snd_vxpocket_assign_resources - initialize the hardware and card instance.
 * @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_vxpocket_assign_resources(vx_core_t *chip, int port, int irq)
{
      int err;
      snd_card_t *card = chip->card;
      struct snd_vxpocket *vxp = (struct snd_vxpocket *)chip;

      snd_printdd(KERN_DEBUG "vxpocket assign resources: port = 0x%x, irq = %d\n", port, irq);
      vxp->port = port;

      sprintf(card->shortname, "Digigram %s", card->driver);
      sprintf(card->longname, "%s at 0x%x, irq %i",
            card->shortname, port, irq);

      chip->irq = irq;

      if ((err = snd_vx_setup_firmware(chip)) < 0)
            return err;

      return 0;
}


/*
 * snd_vxpocket_detach - detach callback for cs
 * @hw: the hardware information
 */
void snd_vxpocket_detach(struct snd_vxp_entry *hw, dev_link_t *link)
{
      vx_core_t *chip;

      if (! link)
            return;

      chip = link->priv;

      snd_printdd(KERN_DEBUG "vxpocket_detach called\n");
      /* Remove the interface data from the linked list */
      if (hw) {
            dev_link_t **linkp;
            /* Locate device structure */
            for (linkp = &hw->dev_list; *linkp; linkp = &(*linkp)->next)
                  if (*linkp == link) {
                        *linkp = link->next;
                        break;
                  }
      }
      chip->chip_status |= VX_STAT_IS_STALE; /* to be sure */
      snd_card_disconnect(chip->card);
      snd_card_free_in_thread(chip->card);
}

/*
 * snd_vxpocket_detach_all - detach all instances linked to the hw
 */
void snd_vxpocket_detach_all(struct snd_vxp_entry *hw)
{
      while (hw->dev_list != NULL)
            snd_vxpocket_detach(hw, hw->dev_list);
}

/*
 * configuration callback
 */

#define CS_CHECK(fn, ret) \
do { last_fn = (fn); if ((last_ret = (ret)) != 0) goto cs_failed; } while (0)

static void vxpocket_config(dev_link_t *link)
{
      client_handle_t handle = link->handle;
      vx_core_t *chip = link->priv;
      struct snd_vxpocket *vxp = (struct snd_vxpocket *)chip;
      tuple_t tuple;
      cisparse_t *parse = NULL;
      u_short buf[32];
      int last_fn, last_ret;

      snd_printdd(KERN_DEBUG "vxpocket_config called\n");
      parse = kmalloc(sizeof(*parse), GFP_KERNEL);
      if (! parse) {
            snd_printk(KERN_ERR "vx: cannot allocate\n");
            return;
      }
      tuple.Attributes = 0;
      tuple.TupleData = (cisdata_t *)buf;
      tuple.TupleDataMax = sizeof(buf);
      tuple.TupleOffset = 0;
      tuple.DesiredTuple = CISTPL_CONFIG;
      CS_CHECK(GetFirstTuple, pcmcia_get_first_tuple(handle, &tuple));
      CS_CHECK(GetTupleData, pcmcia_get_tuple_data(handle, &tuple));
      CS_CHECK(ParseTuple, pcmcia_parse_tuple(handle, &tuple, parse));
      link->conf.ConfigBase = parse->config.base;
      link->conf.Present = parse->config.rmask[0];

      /* Configure card */
      link->state |= DEV_CONFIG;

      CS_CHECK(RequestIO, pcmcia_request_io(handle, &link->io));
      CS_CHECK(RequestIRQ, pcmcia_request_irq(link->handle, &link->irq));
      CS_CHECK(RequestConfiguration, pcmcia_request_configuration(link->handle, &link->conf));

      if (snd_vxpocket_assign_resources(chip, link->io.BasePort1, link->irq.AssignedIRQ) < 0)
            goto failed;

      link->dev = &vxp->node;
      link->state &= ~DEV_CONFIG_PENDING;
      kfree(parse);
      return;

cs_failed:
      cs_error(link->handle, last_fn, last_ret);
failed:
      pcmcia_release_configuration(link->handle);
      pcmcia_release_io(link->handle, &link->io);
      pcmcia_release_irq(link->handle, &link->irq);
      link->state &= ~DEV_CONFIG;
      kfree(parse);
}


/*
 * event callback
 */
static int vxpocket_event(event_t event, int priority, event_callback_args_t *args)
{
      dev_link_t *link = args->client_data;
      vx_core_t *chip = link->priv;

      switch (event) {
      case CS_EVENT_CARD_REMOVAL:
            snd_printdd(KERN_DEBUG "CARD_REMOVAL..\n");
            link->state &= ~DEV_PRESENT;
            if (link->state & DEV_CONFIG) {
                  chip->chip_status |= VX_STAT_IS_STALE;
            }
            break;
      case CS_EVENT_CARD_INSERTION:
            snd_printdd(KERN_DEBUG "CARD_INSERTION..\n");
            link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
            vxpocket_config(link);
            break;
#ifdef CONFIG_PM
      case CS_EVENT_PM_SUSPEND:
            snd_printdd(KERN_DEBUG "SUSPEND\n");
            link->state |= DEV_SUSPEND;
            if (chip && chip->card->pm_suspend) {
                  snd_printdd(KERN_DEBUG "snd_vx_suspend calling\n");
                  chip->card->pm_suspend(chip->card, 0);
            }
            /* Fall through... */
      case CS_EVENT_RESET_PHYSICAL:
            snd_printdd(KERN_DEBUG "RESET_PHYSICAL\n");
            if (link->state & DEV_CONFIG)
                  pcmcia_release_configuration(link->handle);
            break;
      case CS_EVENT_PM_RESUME:
            snd_printdd(KERN_DEBUG "RESUME\n");
            link->state &= ~DEV_SUSPEND;
            /* Fall through... */
      case CS_EVENT_CARD_RESET:
            snd_printdd(KERN_DEBUG "CARD_RESET\n");
            if (DEV_OK(link)) {
                  //struct snd_vxpocket *vxp = (struct snd_vxpocket *)chip;
                  snd_printdd(KERN_DEBUG "requestconfig...\n");
                  pcmcia_request_configuration(link->handle, &link->conf);
                  if (chip && chip->card->pm_resume) {
                        snd_printdd(KERN_DEBUG "calling snd_vx_resume\n");
                        chip->card->pm_resume(chip->card, 0);
                  }
            }
            snd_printdd(KERN_DEBUG "resume done!\n");
            break;
#endif
      }
      return 0;
}

/*
 * exported stuffs
 */
EXPORT_SYMBOL(snd_vxpocket_ops);
EXPORT_SYMBOL(snd_vxpocket_attach);
EXPORT_SYMBOL(snd_vxpocket_detach);
EXPORT_SYMBOL(snd_vxpocket_detach_all);

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