[PATCH] dvb: dst: Fix possible buffer overflow
[linux-2.6] / sound / isa / dt019x.c
1
2 /*
3     dt019x.c - driver for Diamond Technologies DT-0197H based soundcards.
4     Copyright (C) 1999, 2002 by Massimo Piccioni <dafastidio@libero.it>
5
6     Generalised for soundcards based on DT-0196 and ALS-007 chips 
7     by Jonathan Woithe <jwoithe@physics.adelaide.edu.au>: June 2002.
8
9     This program is free software; you can redistribute it and/or modify
10     it under the terms of the GNU General Public License as published by
11     the Free Software Foundation; either version 2 of the License, or
12     (at your option) any later version.
13
14     This program is distributed in the hope that it will be useful,
15     but WITHOUT ANY WARRANTY; without even the implied warranty of
16     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17     GNU General Public License for more details.
18
19     You should have received a copy of the GNU General Public License
20     along with this program; if not, write to the Free Software
21     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
22 */
23
24 #include <sound/driver.h>
25 #include <linux/init.h>
26 #include <linux/sched.h>
27 #include <linux/wait.h>
28 #include <linux/pnp.h>
29 #include <linux/moduleparam.h>
30 #include <sound/core.h>
31 #include <sound/initval.h>
32 #include <sound/mpu401.h>
33 #include <sound/opl3.h>
34 #include <sound/sb.h>
35
36 #define PFX "dt019x: "
37
38 MODULE_AUTHOR("Massimo Piccioni <dafastidio@libero.it>");
39 MODULE_DESCRIPTION("Diamond Technologies DT-019X / Avance Logic ALS-007");
40 MODULE_LICENSE("GPL");
41 MODULE_SUPPORTED_DEVICE("{{Diamond Technologies DT-019X},"
42                "{Avance Logic ALS-007}}");
43
44 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
45 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
46 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE;  /* Enable this card */
47 static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;     /* PnP setup */
48 static long mpu_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* PnP setup */
49 static long fm_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;  /* PnP setup */
50 static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;        /* PnP setup */
51 static int mpu_irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;    /* PnP setup */
52 static int dma8[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;       /* PnP setup */
53
54 module_param_array(index, int, NULL, 0444);
55 MODULE_PARM_DESC(index, "Index value for DT-019X based soundcard.");
56 module_param_array(id, charp, NULL, 0444);
57 MODULE_PARM_DESC(id, "ID string for DT-019X based soundcard.");
58 module_param_array(enable, bool, NULL, 0444);
59 MODULE_PARM_DESC(enable, "Enable DT-019X based soundcard.");
60 module_param_array(port, long, NULL, 0444);
61 MODULE_PARM_DESC(port, "Port # for dt019x driver.");
62 module_param_array(mpu_port, long, NULL, 0444);
63 MODULE_PARM_DESC(mpu_port, "MPU-401 port # for dt019x driver.");
64 module_param_array(fm_port, long, NULL, 0444);
65 MODULE_PARM_DESC(fm_port, "FM port # for dt019x driver.");
66 module_param_array(irq, int, NULL, 0444);
67 MODULE_PARM_DESC(irq, "IRQ # for dt019x driver.");
68 module_param_array(mpu_irq, int, NULL, 0444);
69 MODULE_PARM_DESC(mpu_irq, "MPU-401 IRQ # for dt019x driver.");
70 module_param_array(dma8, int, NULL, 0444);
71 MODULE_PARM_DESC(dma8, "8-bit DMA # for dt019x driver.");
72
73 struct snd_card_dt019x {
74         struct pnp_dev *dev;
75         struct pnp_dev *devmpu;
76         struct pnp_dev *devopl;
77 };
78
79 static struct pnp_card_device_id snd_dt019x_pnpids[] = {
80         /* DT197A30 */
81         { .id = "RWB1688", .devs = { { "@@@0001" }, { "@X@0001" }, { "@H@0001" }, } },
82         /* DT0196 / ALS-007 */
83         { .id = "ALS0007", .devs = { { "@@@0001" }, { "@X@0001" }, { "@H@0001" }, } },
84         { .id = "",  }
85 };
86
87 MODULE_DEVICE_TABLE(pnp_card, snd_dt019x_pnpids);
88
89
90 #define DRIVER_NAME     "snd-card-dt019x"
91
92
93 static int __devinit snd_card_dt019x_pnp(int dev, struct snd_card_dt019x *acard,
94                                          struct pnp_card_link *card,
95                                          const struct pnp_card_device_id *pid)
96 {
97         struct pnp_dev *pdev;
98         struct pnp_resource_table * cfg = kmalloc(sizeof(struct pnp_resource_table), GFP_KERNEL);
99         int err;
100
101         if (!cfg)
102                 return -ENOMEM;
103
104         acard->dev = pnp_request_card_device(card, pid->devs[0].id, NULL);
105         if (acard->dev == NULL) {
106                 kfree (cfg);
107                 return -ENODEV;
108         }
109         acard->devmpu = pnp_request_card_device(card, pid->devs[1].id, NULL);
110         acard->devopl = pnp_request_card_device(card, pid->devs[2].id, NULL);
111
112         pdev = acard->dev;
113         pnp_init_resource_table(cfg);
114
115         if (port[dev] != SNDRV_AUTO_PORT)
116                 pnp_resource_change(&cfg->port_resource[0], port[dev], 16);
117         if (dma8[dev] != SNDRV_AUTO_DMA)
118                 pnp_resource_change(&cfg->dma_resource[0], dma8[dev], 1);
119         if (irq[dev] != SNDRV_AUTO_IRQ)
120                 pnp_resource_change(&cfg->irq_resource[0], irq[dev], 1);
121
122         if ((pnp_manual_config_dev(pdev, cfg, 0)) < 0)
123                 snd_printk(KERN_ERR PFX "DT-019X AUDIO the requested resources are invalid, using auto config\n");
124         err = pnp_activate_dev(pdev);
125         if (err < 0) {
126                 snd_printk(KERN_ERR PFX "DT-019X AUDIO pnp configure failure\n");
127                 kfree(cfg);
128                 return err;
129         }
130
131         port[dev] = pnp_port_start(pdev, 0);
132         dma8[dev] = pnp_dma(pdev, 0);
133         irq[dev] = pnp_irq(pdev, 0);
134         snd_printdd("dt019x: found audio interface: port=0x%lx, irq=0x%x, dma=0x%x\n",
135                         port[dev],irq[dev],dma8[dev]);
136
137         pdev = acard->devmpu;
138
139         if (pdev != NULL) {
140                 pnp_init_resource_table(cfg);
141                 if (mpu_port[dev] != SNDRV_AUTO_PORT)
142                         pnp_resource_change(&cfg->port_resource[0], mpu_port[dev], 2);
143                 if (mpu_irq[dev] != SNDRV_AUTO_IRQ)
144                         pnp_resource_change(&cfg->irq_resource[0], mpu_irq[dev], 1);
145                 if ((pnp_manual_config_dev(pdev, cfg, 0)) < 0)
146                         snd_printk(KERN_ERR PFX "DT-019X MPU401 the requested resources are invalid, using auto config\n");
147                 err = pnp_activate_dev(pdev);
148                 if (err < 0) {
149                         pnp_release_card_device(pdev);
150                         snd_printk(KERN_ERR PFX "DT-019X MPU401 pnp configure failure, skipping\n");
151                         goto __mpu_error;
152                 }
153                 mpu_port[dev] = pnp_port_start(pdev, 0);
154                 mpu_irq[dev] = pnp_irq(pdev, 0);
155                 snd_printdd("dt019x: found MPU-401: port=0x%lx, irq=0x%x\n",
156                                 mpu_port[dev],mpu_irq[dev]);
157         } else {
158         __mpu_error:
159                 acard->devmpu = NULL;
160                 mpu_port[dev] = -1;
161         }
162
163         pdev = acard->devopl;
164         if (pdev != NULL) {
165                 pnp_init_resource_table(cfg);
166                 if (fm_port[dev] != SNDRV_AUTO_PORT)
167                         pnp_resource_change(&cfg->port_resource[0], fm_port[dev], 4);
168                 if ((pnp_manual_config_dev(pdev, cfg, 0)) < 0)
169                         snd_printk(KERN_ERR PFX "DT-019X OPL3 the requested resources are invalid, using auto config\n");
170                 err = pnp_activate_dev(pdev);
171                 if (err < 0) {
172                         pnp_release_card_device(pdev);
173                         snd_printk(KERN_ERR PFX "DT-019X OPL3 pnp configure failure, skipping\n");
174                         goto __fm_error;
175                 }
176                 fm_port[dev] = pnp_port_start(pdev, 0);
177                 snd_printdd("dt019x: found OPL3 synth: port=0x%lx\n",fm_port[dev]);
178         } else {
179         __fm_error:
180                 acard->devopl = NULL;
181                 fm_port[dev] = -1;
182         }
183
184         kfree(cfg);
185         return 0;
186 }
187
188 static int __devinit snd_card_dt019x_probe(int dev, struct pnp_card_link *pcard, const struct pnp_card_device_id *pid)
189 {
190         int error;
191         sb_t *chip;
192         snd_card_t *card;
193         struct snd_card_dt019x *acard;
194         opl3_t *opl3;
195
196         if ((card = snd_card_new(index[dev], id[dev], THIS_MODULE,
197                                  sizeof(struct snd_card_dt019x))) == NULL)
198                 return -ENOMEM;
199         acard = (struct snd_card_dt019x *)card->private_data;
200
201         snd_card_set_dev(card, &pcard->card->dev);
202         if ((error = snd_card_dt019x_pnp(dev, acard, pcard, pid))) {
203                 snd_card_free(card);
204                 return error;
205         }
206
207         if ((error = snd_sbdsp_create(card, port[dev],
208                                       irq[dev],
209                                       snd_sb16dsp_interrupt,
210                                       dma8[dev],
211                                       -1,
212                                       SB_HW_DT019X,
213                                       &chip)) < 0) {
214                 snd_card_free(card);
215                 return error;
216         }
217
218         strcpy(card->driver, "DT-019X");
219         strcpy(card->shortname, "Diamond Tech. DT-019X");
220         sprintf(card->longname, "%s, %s at 0x%lx, irq %d, dma %d",
221                 card->shortname, chip->name, chip->port,
222                 irq[dev], dma8[dev]);
223
224         if ((error = snd_sb16dsp_pcm(chip, 0, NULL)) < 0) {
225                 snd_card_free(card);
226                 return error;
227         }
228         if ((error = snd_sbmixer_new(chip)) < 0) {
229                 snd_card_free(card);
230                 return error;
231         }
232
233         if (mpu_port[dev] > 0 && mpu_port[dev] != SNDRV_AUTO_PORT) {
234                 if (mpu_irq[dev] == SNDRV_AUTO_IRQ)
235                         mpu_irq[dev] = -1;
236                 if (snd_mpu401_uart_new(card, 0,
237 /*                                      MPU401_HW_SB,*/
238                                         MPU401_HW_MPU401,
239                                         mpu_port[dev], 0,
240                                         mpu_irq[dev],
241                                         mpu_irq[dev] >= 0 ? SA_INTERRUPT : 0,
242                                         NULL) < 0)
243                         snd_printk(KERN_ERR PFX "no MPU-401 device at 0x%lx ?\n", mpu_port[dev]);
244         }
245
246         if (fm_port[dev] > 0 && fm_port[dev] != SNDRV_AUTO_PORT) {
247                 if (snd_opl3_create(card,
248                                     fm_port[dev],
249                                     fm_port[dev] + 2,
250                                     OPL3_HW_AUTO, 0, &opl3) < 0) {
251                         snd_printk(KERN_ERR PFX "no OPL device at 0x%lx-0x%lx ?\n",
252                                    fm_port[dev], fm_port[dev] + 2);
253                 } else {
254                         if ((error = snd_opl3_timer_new(opl3, 0, 1)) < 0) {
255                                 snd_card_free(card);
256                                 return error;
257                         }
258                         if ((error = snd_opl3_hwdep_new(opl3, 0, 1, NULL)) < 0) {
259                                 snd_card_free(card);
260                                 return error;
261                         }
262                 }
263         }
264
265         if ((error = snd_card_register(card)) < 0) {
266                 snd_card_free(card);
267                 return error;
268         }
269         pnp_set_card_drvdata(pcard, card);
270         return 0;
271 }
272
273 static int __devinit snd_dt019x_pnp_probe(struct pnp_card_link *card,
274                                           const struct pnp_card_device_id *pid)
275 {
276         static int dev;
277         int res;
278
279         for ( ; dev < SNDRV_CARDS; dev++) {
280                 if (!enable[dev])
281                         continue;
282                 res = snd_card_dt019x_probe(dev, card, pid);
283                 if (res < 0)
284                         return res;
285                 dev++;
286                 return 0;
287         }
288         return -ENODEV;
289 }
290
291 static void __devexit snd_dt019x_pnp_remove(struct pnp_card_link * pcard)
292 {
293         snd_card_t *card = (snd_card_t *) pnp_get_card_drvdata(pcard);
294         snd_card_disconnect(card);
295         snd_card_free_in_thread(card);
296 }
297
298 static struct pnp_card_driver dt019x_pnpc_driver = {
299         .flags          = PNP_DRIVER_RES_DISABLE,
300         .name           = "dt019x",
301         .id_table       = snd_dt019x_pnpids,
302         .probe          = snd_dt019x_pnp_probe,
303         .remove         = __devexit_p(snd_dt019x_pnp_remove),
304 };
305
306 static int __init alsa_card_dt019x_init(void)
307 {
308         int cards = 0;
309
310         cards += pnp_register_card_driver(&dt019x_pnpc_driver);
311
312 #ifdef MODULE
313         if (!cards) {
314                 pnp_unregister_card_driver(&dt019x_pnpc_driver);
315                 snd_printk(KERN_ERR "no DT-019X / ALS-007 based soundcards found\n");
316         }
317 #endif
318         return cards ? 0 : -ENODEV;
319 }
320
321 static void __exit alsa_card_dt019x_exit(void)
322 {
323         pnp_unregister_card_driver(&dt019x_pnpc_driver);
324 }
325
326 module_init(alsa_card_dt019x_init)
327 module_exit(alsa_card_dt019x_exit)