[ALSA] Fix check of enable module option
[linux-2.6.git] / sound / isa / cs423x / cs4231.c
1 /*
2  *  Generic driver for CS4231 chips
3  *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
4  *  Originally the CS4232/CS4232A driver, modified for use on CS4231 by
5  *  Tugrul Galatali <galatalt@stuy.edu>
6  *
7  *   This program is free software; you can redistribute it and/or modify
8  *   it under the terms of the GNU General Public License as published by
9  *   the Free Software Foundation; either version 2 of the License, or
10  *   (at your option) any later version.
11  *
12  *   This program is distributed in the hope that it will be useful,
13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  *   GNU General Public License for more details.
16  *
17  *   You should have received a copy of the GNU General Public License
18  *   along with this program; if not, write to the Free Software
19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
20  *
21  */
22
23 #include <sound/driver.h>
24 #include <linux/init.h>
25 #include <linux/err.h>
26 #include <linux/platform_device.h>
27 #include <linux/time.h>
28 #include <linux/wait.h>
29 #include <linux/moduleparam.h>
30 #include <sound/core.h>
31 #include <sound/cs4231.h>
32 #include <sound/mpu401.h>
33 #include <sound/initval.h>
34
35 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
36 MODULE_DESCRIPTION("Generic CS4231");
37 MODULE_LICENSE("GPL");
38 MODULE_SUPPORTED_DEVICE("{{Crystal Semiconductors,CS4231}}");
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 int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE;  /* Enable this card */
43 static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;     /* PnP setup */
44 static long mpu_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* PnP setup */
45 static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;        /* 5,7,9,11,12,15 */
46 static int mpu_irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;    /* 9,11,12,15 */
47 static int dma1[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;       /* 0,1,3,5,6,7 */
48 static int dma2[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;       /* 0,1,3,5,6,7 */
49
50 module_param_array(index, int, NULL, 0444);
51 MODULE_PARM_DESC(index, "Index value for CS4231 soundcard.");
52 module_param_array(id, charp, NULL, 0444);
53 MODULE_PARM_DESC(id, "ID string for CS4231 soundcard.");
54 module_param_array(enable, bool, NULL, 0444);
55 MODULE_PARM_DESC(enable, "Enable CS4231 soundcard.");
56 module_param_array(port, long, NULL, 0444);
57 MODULE_PARM_DESC(port, "Port # for CS4231 driver.");
58 module_param_array(mpu_port, long, NULL, 0444);
59 MODULE_PARM_DESC(mpu_port, "MPU-401 port # for CS4231 driver.");
60 module_param_array(irq, int, NULL, 0444);
61 MODULE_PARM_DESC(irq, "IRQ # for CS4231 driver.");
62 module_param_array(mpu_irq, int, NULL, 0444);
63 MODULE_PARM_DESC(mpu_irq, "MPU-401 IRQ # for CS4231 driver.");
64 module_param_array(dma1, int, NULL, 0444);
65 MODULE_PARM_DESC(dma1, "DMA1 # for CS4231 driver.");
66 module_param_array(dma2, int, NULL, 0444);
67 MODULE_PARM_DESC(dma2, "DMA2 # for CS4231 driver.");
68
69 static struct platform_device *devices[SNDRV_CARDS];
70
71
72 static int __init snd_cs4231_probe(struct platform_device *pdev)
73 {
74         int dev = pdev->id;
75         struct snd_card *card;
76         struct snd_pcm *pcm;
77         struct snd_cs4231 *chip;
78         int err;
79
80         if (port[dev] == SNDRV_AUTO_PORT) {
81                 snd_printk(KERN_ERR "specify port\n");
82                 return -EINVAL;
83         }
84         if (irq[dev] == SNDRV_AUTO_IRQ) {
85                 snd_printk(KERN_ERR "specify irq\n");
86                 return -EINVAL;
87         }
88         if (dma1[dev] == SNDRV_AUTO_DMA) {
89                 snd_printk(KERN_ERR "specify dma1\n");
90                 return -EINVAL;
91         }
92         card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
93         if (card == NULL)
94                 return -ENOMEM;
95         if ((err = snd_cs4231_create(card, port[dev], -1,
96                                      irq[dev],
97                                      dma1[dev],
98                                      dma2[dev],
99                                      CS4231_HW_DETECT,
100                                      0, &chip)) < 0)
101                 goto _err;
102         card->private_data = chip;
103
104         if ((err = snd_cs4231_pcm(chip, 0, &pcm)) < 0)
105                 goto _err;
106
107         strcpy(card->driver, "CS4231");
108         strcpy(card->shortname, pcm->name);
109         sprintf(card->longname, "%s at 0x%lx, irq %d, dma %d",
110                 pcm->name, chip->port, irq[dev], dma1[dev]);
111         if (dma2[dev] >= 0)
112                 sprintf(card->longname + strlen(card->longname), "&%d", dma2[dev]);
113
114         if ((err = snd_cs4231_mixer(chip)) < 0)
115                 goto _err;
116         if ((err = snd_cs4231_timer(chip, 0, NULL)) < 0)
117                 goto _err;
118
119         if (mpu_port[dev] > 0 && mpu_port[dev] != SNDRV_AUTO_PORT) {
120                 if (mpu_irq[dev] == SNDRV_AUTO_IRQ)
121                         mpu_irq[dev] = -1;
122                 if (snd_mpu401_uart_new(card, 0, MPU401_HW_CS4232,
123                                         mpu_port[dev], 0,
124                                         mpu_irq[dev],
125                                         mpu_irq[dev] >= 0 ? SA_INTERRUPT : 0,
126                                         NULL) < 0)
127                         printk(KERN_WARNING "cs4231: MPU401 not detected\n");
128         }
129
130         snd_card_set_dev(card, &pdev->dev);
131
132         if ((err = snd_card_register(card)) < 0)
133                 goto _err;
134
135         platform_set_drvdata(pdev, card);
136         return 0;
137
138  _err:
139         snd_card_free(card);
140         return err;
141 }
142
143 static int __devexit snd_cs4231_remove(struct platform_device *devptr)
144 {
145         snd_card_free(platform_get_drvdata(devptr));
146         platform_set_drvdata(devptr, NULL);
147         return 0;
148 }
149
150 #ifdef CONFIG_PM
151 static int snd_cs4231_suspend(struct platform_device *dev, pm_message_t state)
152 {
153         struct snd_card *card;
154         struct snd_cs4231 *chip;
155         card = platform_get_drvdata(dev);
156         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
157         chip = card->private_data;
158         chip->suspend(chip);
159         return 0;
160 }
161
162 static int snd_cs4231_resume(struct platform_device *dev)
163 {
164         struct snd_card *card;
165         struct snd_cs4231 *chip;
166         card = platform_get_drvdata(dev);
167         chip = card->private_data;
168         chip->resume(chip);
169         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
170         return 0;
171 }
172 #endif
173
174 #define SND_CS4231_DRIVER       "snd_cs4231"
175
176 static struct platform_driver snd_cs4231_driver = {
177         .probe          = snd_cs4231_probe,
178         .remove         = __devexit_p(snd_cs4231_remove),
179 #ifdef CONFIG_PM
180         .suspend        = snd_cs4231_suspend,
181         .resume         = snd_cs4231_resume,
182 #endif
183         .driver         = {
184                 .name   = SND_CS4231_DRIVER
185         },
186 };
187
188 static void __init_or_module snd_cs4231_unregister_all(void)
189 {
190         int i;
191
192         for (i = 0; i < ARRAY_SIZE(devices); ++i)
193                 platform_device_unregister(devices[i]);
194         platform_driver_unregister(&snd_cs4231_driver);
195 }
196
197 static int __init alsa_card_cs4231_init(void)
198 {
199         int i, cards, err;
200
201         err = platform_driver_register(&snd_cs4231_driver);
202         if (err < 0)
203                 return err;
204
205         cards = 0;
206         for (i = 0; i < SNDRV_CARDS; i++) {
207                 struct platform_device *device;
208                 if (! enable[i])
209                         continue;
210                 device = platform_device_register_simple(SND_CS4231_DRIVER,
211                                                          i, NULL, 0);
212                 if (IS_ERR(device)) {
213                         err = PTR_ERR(device);
214                         goto errout;
215                 }
216                 devices[i] = device;
217                 cards++;
218         }
219         if (!cards) {
220 #ifdef MODULE
221                 printk(KERN_ERR "CS4231 soundcard not found or device busy\n");
222 #endif
223                 err = -ENODEV;
224                 goto errout;
225         }
226         return 0;
227
228  errout:
229         snd_cs4231_unregister_all();
230         return err;
231 }
232
233 static void __exit alsa_card_cs4231_exit(void)
234 {
235         snd_cs4231_unregister_all();
236 }
237
238 module_init(alsa_card_cs4231_init)
239 module_exit(alsa_card_cs4231_exit)