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 <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@perex.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) 291