23fee622c8fc50bfb0e659dc2991a27e43bf7e30
[linux-2.6.git] / sound / drivers / mpu401 / mpu401.c
1 /*
2  *  Driver for generic MPU-401 boards (UART mode only)
3  *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
4  *  Copyright (c) 2004 by Castet Matthieu <castet.matthieu@free.fr>
5  *
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/pnp.h>
26 #include <linux/err.h>
27 #include <linux/platform_device.h>
28 #include <linux/moduleparam.h>
29 #include <sound/core.h>
30 #include <sound/mpu401.h>
31 #include <sound/initval.h>
32
33 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
34 MODULE_DESCRIPTION("MPU-401 UART");
35 MODULE_LICENSE("GPL");
36
37 static int index[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = -2}; /* exclude the first card */
38 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
39 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE;  /* Enable this card */
40 #ifdef CONFIG_PNP
41 static int pnp[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
42 #endif
43 static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;     /* MPU-401 port number */
44 static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;        /* MPU-401 IRQ */
45 static int uart_enter[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
46
47 module_param_array(index, int, NULL, 0444);
48 MODULE_PARM_DESC(index, "Index value for MPU-401 device.");
49 module_param_array(id, charp, NULL, 0444);
50 MODULE_PARM_DESC(id, "ID string for MPU-401 device.");
51 module_param_array(enable, bool, NULL, 0444);
52 MODULE_PARM_DESC(enable, "Enable MPU-401 device.");
53 #ifdef CONFIG_PNP
54 module_param_array(pnp, bool, NULL, 0444);
55 MODULE_PARM_DESC(pnp, "PnP detection for MPU-401 device.");
56 #endif
57 module_param_array(port, long, NULL, 0444);
58 MODULE_PARM_DESC(port, "Port # for MPU-401 device.");
59 module_param_array(irq, int, NULL, 0444);
60 MODULE_PARM_DESC(irq, "IRQ # for MPU-401 device.");
61 module_param_array(uart_enter, bool, NULL, 0444);
62 MODULE_PARM_DESC(uart_enter, "Issue UART_ENTER command at open.");
63
64 static struct platform_device *platform_devices[SNDRV_CARDS];
65 static int pnp_registered;
66 static unsigned int snd_mpu401_devices;
67
68 static int snd_mpu401_create(int dev, struct snd_card **rcard)
69 {
70         struct snd_card *card;
71         int err;
72
73         if (!uart_enter[dev])
74                 snd_printk(KERN_ERR "the uart_enter option is obsolete; remove it\n");
75
76         *rcard = NULL;
77         card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
78         if (card == NULL)
79                 return -ENOMEM;
80         strcpy(card->driver, "MPU-401 UART");
81         strcpy(card->shortname, card->driver);
82         sprintf(card->longname, "%s at %#lx, ", card->shortname, port[dev]);
83         if (irq[dev] >= 0) {
84                 sprintf(card->longname + strlen(card->longname), "irq %d", irq[dev]);
85         } else {
86                 strcat(card->longname, "polled");
87         }
88
89         err = snd_mpu401_uart_new(card, 0, MPU401_HW_MPU401, port[dev], 0,
90                                   irq[dev], irq[dev] >= 0 ? IRQF_DISABLED : 0,
91                                   NULL);
92         if (err < 0) {
93                 printk(KERN_ERR "MPU401 not detected at 0x%lx\n", port[dev]);
94                 goto _err;
95         }
96
97         *rcard = card;
98         return 0;
99
100  _err:
101         snd_card_free(card);
102         return err;
103 }
104
105 static int __devinit snd_mpu401_probe(struct platform_device *devptr)
106 {
107         int dev = devptr->id;
108         int err;
109         struct snd_card *card;
110
111         if (port[dev] == SNDRV_AUTO_PORT) {
112                 snd_printk(KERN_ERR "specify port\n");
113                 return -EINVAL;
114         }
115         if (irq[dev] == SNDRV_AUTO_IRQ) {
116                 snd_printk(KERN_ERR "specify or disable IRQ\n");
117                 return -EINVAL;
118         }
119         err = snd_mpu401_create(dev, &card);
120         if (err < 0)
121                 return err;
122         snd_card_set_dev(card, &devptr->dev);
123         if ((err = snd_card_register(card)) < 0) {
124                 snd_card_free(card);
125                 return err;
126         }
127         platform_set_drvdata(devptr, card);
128         return 0;
129 }
130
131 static int __devexit snd_mpu401_remove(struct platform_device *devptr)
132 {
133         snd_card_free(platform_get_drvdata(devptr));
134         platform_set_drvdata(devptr, NULL);
135         return 0;
136 }
137
138 #define SND_MPU401_DRIVER       "snd_mpu401"
139
140 static struct platform_driver snd_mpu401_driver = {
141         .probe          = snd_mpu401_probe,
142         .remove         = __devexit_p(snd_mpu401_remove),
143         .driver         = {
144                 .name   = SND_MPU401_DRIVER
145         },
146 };
147
148
149 #ifdef CONFIG_PNP
150
151 #define IO_EXTENT 2
152
153 static struct pnp_device_id snd_mpu401_pnpids[] = {
154         { .id = "PNPb006" },
155         { .id = "" }
156 };
157
158 MODULE_DEVICE_TABLE(pnp, snd_mpu401_pnpids);
159
160 static int __devinit snd_mpu401_pnp(int dev, struct pnp_dev *device,
161                                  const struct pnp_device_id *id)
162 {
163         if (!pnp_port_valid(device, 0) ||
164             pnp_port_flags(device, 0) & IORESOURCE_DISABLED) {
165                 snd_printk(KERN_ERR "no PnP port\n");
166                 return -ENODEV;
167         }
168         if (pnp_port_len(device, 0) < IO_EXTENT) {
169                 snd_printk(KERN_ERR "PnP port length is %llu, expected %d\n",
170                            (unsigned long long)pnp_port_len(device, 0),
171                            IO_EXTENT);
172                 return -ENODEV;
173         }
174         port[dev] = pnp_port_start(device, 0);
175
176         if (!pnp_irq_valid(device, 0) ||
177             pnp_irq_flags(device, 0) & IORESOURCE_DISABLED) {
178                 snd_printk(KERN_WARNING "no PnP irq, using polling\n");
179                 irq[dev] = -1;
180         } else {
181                 irq[dev] = pnp_irq(device, 0);
182         }
183         return 0;
184 }
185
186 static int __devinit snd_mpu401_pnp_probe(struct pnp_dev *pnp_dev,
187                                           const struct pnp_device_id *id)
188 {
189         static int dev;
190         struct snd_card *card;
191         int err;
192
193         for ( ; dev < SNDRV_CARDS; ++dev) {
194                 if (!enable[dev] || !pnp[dev])
195                         continue;
196                 err = snd_mpu401_pnp(dev, pnp_dev, id);
197                 if (err < 0)
198                         return err;
199                 err = snd_mpu401_create(dev, &card);
200                 if (err < 0)
201                         return err;
202                 if ((err = snd_card_register(card)) < 0) {
203                         snd_card_free(card);
204                         return err;
205                 }
206                 snd_card_set_dev(card, &pnp_dev->dev);
207                 pnp_set_drvdata(pnp_dev, card);
208                 snd_mpu401_devices++;
209                 ++dev;
210                 return 0;
211         }
212         return -ENODEV;
213 }
214
215 static void __devexit snd_mpu401_pnp_remove(struct pnp_dev *dev)
216 {
217         struct snd_card *card = (struct snd_card *) pnp_get_drvdata(dev);
218
219         snd_card_disconnect(card);
220         snd_card_free_when_closed(card);
221 }
222
223 static struct pnp_driver snd_mpu401_pnp_driver = {
224         .name = "mpu401",
225         .id_table = snd_mpu401_pnpids,
226         .probe = snd_mpu401_pnp_probe,
227         .remove = __devexit_p(snd_mpu401_pnp_remove),
228 };
229 #else
230 static struct pnp_driver snd_mpu401_pnp_driver;
231 #endif
232
233 static void snd_mpu401_unregister_all(void)
234 {
235         int i;
236
237         if (pnp_registered)
238                 pnp_unregister_driver(&snd_mpu401_pnp_driver);
239         for (i = 0; i < ARRAY_SIZE(platform_devices); ++i)
240                 platform_device_unregister(platform_devices[i]);
241         platform_driver_unregister(&snd_mpu401_driver);
242 }
243
244 static int __init alsa_card_mpu401_init(void)
245 {
246         int i, err;
247
248         if ((err = platform_driver_register(&snd_mpu401_driver)) < 0)
249                 return err;
250
251         for (i = 0; i < SNDRV_CARDS; i++) {
252                 struct platform_device *device;
253                 if (! enable[i])
254                         continue;
255 #ifdef CONFIG_PNP
256                 if (pnp[i])
257                         continue;
258 #endif
259                 device = platform_device_register_simple(SND_MPU401_DRIVER,
260                                                          i, NULL, 0);
261                 if (IS_ERR(device))
262                         continue;
263                 if (!platform_get_drvdata(device)) {
264                         platform_device_unregister(device);
265                         continue;
266                 }
267                 platform_devices[i] = device;
268                 snd_mpu401_devices++;
269         }
270         err = pnp_register_driver(&snd_mpu401_pnp_driver);
271         if (!err)
272                 pnp_registered = 1;
273
274         if (!snd_mpu401_devices) {
275 #ifdef MODULE
276                 printk(KERN_ERR "MPU-401 device not found or device busy\n");
277 #endif
278                 snd_mpu401_unregister_all();
279                 return -ENODEV;
280         }
281         return 0;
282 }
283
284 static void __exit alsa_card_mpu401_exit(void)
285 {
286         snd_mpu401_unregister_all();
287 }
288
289 module_init(alsa_card_mpu401_init)
290 module_exit(alsa_card_mpu401_exit)