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
32MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
33MODULE_DESCRIPTION("MPU-401 UART");
34MODULE_LICENSE("GPL");
35
36static int index[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = -2}; /* exclude the first card */
37static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;	/* ID for this card */
38static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE;	/* Enable this card */
39#ifdef CONFIG_PNP
40static bool pnp[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
41#endif
42static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;	/* MPU-401 port number */
43static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;	/* MPU-401 IRQ */
44static bool uart_enter[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
45
46module_param_array(index, int, NULL, 0444);
47MODULE_PARM_DESC(index, "Index value for MPU-401 device.");
48module_param_array(id, charp, NULL, 0444);
49MODULE_PARM_DESC(id, "ID string for MPU-401 device.");
50module_param_array(enable, bool, NULL, 0444);
51MODULE_PARM_DESC(enable, "Enable MPU-401 device.");
52#ifdef CONFIG_PNP
53module_param_array(pnp, bool, NULL, 0444);
54MODULE_PARM_DESC(pnp, "PnP detection for MPU-401 device.");
55#endif
56module_param_array(port, long, NULL, 0444);
57MODULE_PARM_DESC(port, "Port # for MPU-401 device.");
58module_param_array(irq, int, NULL, 0444);
59MODULE_PARM_DESC(irq, "IRQ # for MPU-401 device.");
60module_param_array(uart_enter, bool, NULL, 0444);
61MODULE_PARM_DESC(uart_enter, "Issue UART_ENTER command at open.");
62
63static struct platform_device *platform_devices[SNDRV_CARDS];
64static int pnp_registered;
65static unsigned int snd_mpu401_devices;
66
67static 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
105static 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
130static 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
138static 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
151static struct pnp_device_id snd_mpu401_pnpids[] = {
152	{ .id = "PNPb006" },
153	{ .id = "" }
154};
155
156MODULE_DEVICE_TABLE(pnp, snd_mpu401_pnpids);
157
158static 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
184static 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
212static 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
220static 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
227static struct pnp_driver snd_mpu401_pnp_driver;
228#endif
229
230static 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
241static 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
281static void __exit alsa_card_mpu401_exit(void)
282{
283	snd_mpu401_unregister_all();
284}
285
286module_init(alsa_card_mpu401_init)
287module_exit(alsa_card_mpu401_exit)
288