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Linux/sound/pcmcia/pdaudiocf/pdaudiocf.c

  1 /*
  2  * Driver for Sound Core PDAudioCF soundcard
  3  *
  4  * Copyright (c) 2003 by Jaroslav Kysela <perex@perex.cz>
  5  *
  6  *   This program is free software; you can redistribute it and/or modify
  7  *   it under the terms of the GNU General Public License as published by
  8  *   the Free Software Foundation; either version 2 of the License, or
  9  *   (at your option) any later version.
 10  *
 11  *   This program is distributed in the hope that it will be useful,
 12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 14  *   GNU General Public License for more details.
 15  *
 16  *   You should have received a copy of the GNU General Public License
 17  *   along with this program; if not, write to the Free Software
 18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 19  */
 20 
 21 #include <sound/core.h>
 22 #include <linux/slab.h>
 23 #include <linux/module.h>
 24 #include <pcmcia/ciscode.h>
 25 #include <pcmcia/cisreg.h>
 26 #include "pdaudiocf.h"
 27 #include <sound/initval.h>
 28 #include <linux/init.h>
 29 
 30 /*
 31  */
 32 
 33 #define CARD_NAME       "PDAudio-CF"
 34 
 35 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
 36 MODULE_DESCRIPTION("Sound Core " CARD_NAME);
 37 MODULE_LICENSE("GPL");
 38 MODULE_SUPPORTED_DEVICE("{{Sound Core," CARD_NAME "}}");
 39 
 40 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
 41 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
 42 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;     /* Enable switches */
 43 
 44 module_param_array(index, int, NULL, 0444);
 45 MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard.");
 46 module_param_array(id, charp, NULL, 0444);
 47 MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard.");
 48 module_param_array(enable, bool, NULL, 0444);
 49 MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard.");
 50 
 51 /*
 52  */
 53 
 54 static struct snd_card *card_list[SNDRV_CARDS];
 55 
 56 /*
 57  * prototypes
 58  */
 59 static int pdacf_config(struct pcmcia_device *link);
 60 static void snd_pdacf_detach(struct pcmcia_device *p_dev);
 61 
 62 static void pdacf_release(struct pcmcia_device *link)
 63 {
 64         free_irq(link->irq, link->priv);
 65         pcmcia_disable_device(link);
 66 }
 67 
 68 /*
 69  * destructor
 70  */
 71 static int snd_pdacf_free(struct snd_pdacf *pdacf)
 72 {
 73         struct pcmcia_device *link = pdacf->p_dev;
 74 
 75         pdacf_release(link);
 76 
 77         card_list[pdacf->index] = NULL;
 78         pdacf->card = NULL;
 79 
 80         kfree(pdacf);
 81         return 0;
 82 }
 83 
 84 static int snd_pdacf_dev_free(struct snd_device *device)
 85 {
 86         struct snd_pdacf *chip = device->device_data;
 87         return snd_pdacf_free(chip);
 88 }
 89 
 90 /*
 91  * snd_pdacf_attach - attach callback for cs
 92  */
 93 static int snd_pdacf_probe(struct pcmcia_device *link)
 94 {
 95         int i, err;
 96         struct snd_pdacf *pdacf;
 97         struct snd_card *card;
 98         static struct snd_device_ops ops = {
 99                 .dev_free =     snd_pdacf_dev_free,
100         };
101 
102         snd_printdd(KERN_DEBUG "pdacf_attach called\n");
103         /* find an empty slot from the card list */
104         for (i = 0; i < SNDRV_CARDS; i++) {
105                 if (! card_list[i])
106                         break;
107         }
108         if (i >= SNDRV_CARDS) {
109                 snd_printk(KERN_ERR "pdacf: too many cards found\n");
110                 return -EINVAL;
111         }
112         if (! enable[i])
113                 return -ENODEV; /* disabled explicitly */
114 
115         /* ok, create a card instance */
116         err = snd_card_new(&link->dev, index[i], id[i], THIS_MODULE,
117                            0, &card);
118         if (err < 0) {
119                 snd_printk(KERN_ERR "pdacf: cannot create a card instance\n");
120                 return err;
121         }
122 
123         pdacf = snd_pdacf_create(card);
124         if (!pdacf) {
125                 snd_card_free(card);
126                 return -ENOMEM;
127         }
128 
129         err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, pdacf, &ops);
130         if (err < 0) {
131                 kfree(pdacf);
132                 snd_card_free(card);
133                 return err;
134         }
135 
136         pdacf->index = i;
137         card_list[i] = card;
138 
139         pdacf->p_dev = link;
140         link->priv = pdacf;
141 
142         link->resource[0]->flags |= IO_DATA_PATH_WIDTH_AUTO;
143         link->resource[0]->end = 16;
144 
145         link->config_flags = CONF_ENABLE_IRQ | CONF_ENABLE_PULSE_IRQ;
146         link->config_index = 1;
147         link->config_regs = PRESENT_OPTION;
148 
149         return pdacf_config(link);
150 }
151 
152 
153 /**
154  * snd_pdacf_assign_resources - initialize the hardware and card instance.
155  * @port: i/o port for the card
156  * @irq: irq number for the card
157  *
158  * this function assigns the specified port and irq, boot the card,
159  * create pcm and control instances, and initialize the rest hardware.
160  *
161  * returns 0 if successful, or a negative error code.
162  */
163 static int snd_pdacf_assign_resources(struct snd_pdacf *pdacf, int port, int irq)
164 {
165         int err;
166         struct snd_card *card = pdacf->card;
167 
168         snd_printdd(KERN_DEBUG "pdacf assign resources: port = 0x%x, irq = %d\n", port, irq);
169         pdacf->port = port;
170         pdacf->irq = irq;
171         pdacf->chip_status |= PDAUDIOCF_STAT_IS_CONFIGURED;
172 
173         err = snd_pdacf_ak4117_create(pdacf);
174         if (err < 0)
175                 return err;     
176 
177         strcpy(card->driver, "PDAudio-CF");
178         sprintf(card->shortname, "Core Sound %s", card->driver);
179         sprintf(card->longname, "%s at 0x%x, irq %i",
180                 card->shortname, port, irq);
181 
182         err = snd_pdacf_pcm_new(pdacf);
183         if (err < 0)
184                 return err;
185 
186         if ((err = snd_card_register(card)) < 0)
187                 return err;
188 
189         return 0;
190 }
191 
192 
193 /*
194  * snd_pdacf_detach - detach callback for cs
195  */
196 static void snd_pdacf_detach(struct pcmcia_device *link)
197 {
198         struct snd_pdacf *chip = link->priv;
199 
200         snd_printdd(KERN_DEBUG "pdacf_detach called\n");
201 
202         if (chip->chip_status & PDAUDIOCF_STAT_IS_CONFIGURED)
203                 snd_pdacf_powerdown(chip);
204         chip->chip_status |= PDAUDIOCF_STAT_IS_STALE; /* to be sure */
205         snd_card_disconnect(chip->card);
206         snd_card_free_when_closed(chip->card);
207 }
208 
209 /*
210  * configuration callback
211  */
212 
213 static int pdacf_config(struct pcmcia_device *link)
214 {
215         struct snd_pdacf *pdacf = link->priv;
216         int ret;
217 
218         snd_printdd(KERN_DEBUG "pdacf_config called\n");
219         link->config_index = 0x5;
220         link->config_flags |= CONF_ENABLE_IRQ | CONF_ENABLE_PULSE_IRQ;
221 
222         ret = pcmcia_request_io(link);
223         if (ret)
224                 goto failed_preirq;
225 
226         ret = request_threaded_irq(link->irq, pdacf_interrupt,
227                                    pdacf_threaded_irq,
228                                    IRQF_SHARED, link->devname, link->priv);
229         if (ret)
230                 goto failed_preirq;
231 
232         ret = pcmcia_enable_device(link);
233         if (ret)
234                 goto failed;
235 
236         if (snd_pdacf_assign_resources(pdacf, link->resource[0]->start,
237                                         link->irq) < 0)
238                 goto failed;
239 
240         return 0;
241 
242  failed:
243         free_irq(link->irq, link->priv);
244 failed_preirq:
245         pcmcia_disable_device(link);
246         return -ENODEV;
247 }
248 
249 #ifdef CONFIG_PM
250 
251 static int pdacf_suspend(struct pcmcia_device *link)
252 {
253         struct snd_pdacf *chip = link->priv;
254 
255         snd_printdd(KERN_DEBUG "SUSPEND\n");
256         if (chip) {
257                 snd_printdd(KERN_DEBUG "snd_pdacf_suspend calling\n");
258                 snd_pdacf_suspend(chip);
259         }
260 
261         return 0;
262 }
263 
264 static int pdacf_resume(struct pcmcia_device *link)
265 {
266         struct snd_pdacf *chip = link->priv;
267 
268         snd_printdd(KERN_DEBUG "RESUME\n");
269         if (pcmcia_dev_present(link)) {
270                 if (chip) {
271                         snd_printdd(KERN_DEBUG "calling snd_pdacf_resume\n");
272                         snd_pdacf_resume(chip);
273                 }
274         }
275         snd_printdd(KERN_DEBUG "resume done!\n");
276 
277         return 0;
278 }
279 
280 #endif
281 
282 /*
283  * Module entry points
284  */
285 static const struct pcmcia_device_id snd_pdacf_ids[] = {
286         /* this is too general PCMCIA_DEVICE_MANF_CARD(0x015d, 0x4c45), */
287         PCMCIA_DEVICE_PROD_ID12("Core Sound","PDAudio-CF",0x396d19d2,0x71717b49),
288         PCMCIA_DEVICE_NULL
289 };
290 MODULE_DEVICE_TABLE(pcmcia, snd_pdacf_ids);
291 
292 static struct pcmcia_driver pdacf_cs_driver = {
293         .owner          = THIS_MODULE,
294         .name           = "snd-pdaudiocf",
295         .probe          = snd_pdacf_probe,
296         .remove         = snd_pdacf_detach,
297         .id_table       = snd_pdacf_ids,
298 #ifdef CONFIG_PM
299         .suspend        = pdacf_suspend,
300         .resume         = pdacf_resume,
301 #endif
302 };
303 module_pcmcia_driver(pdacf_cs_driver);
304 

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