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