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/moduleparam.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 int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE; /* Enable this card */ 39 #ifdef CONFIG_PNP 40 static int 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 int 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_array(port, long, NULL, 0444); 57 MODULE_PARM_DESC(port, "Port # for MPU-401 device."); 58 module_param_array(irq, int, 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 67 static int snd_mpu401_create(int dev, struct snd_card **rcard) 68 { 69 struct snd_card *card; 70 int err; 71 72 if (!uart_enter[dev]) 73 snd_printk(KERN_ERR "the uart_enter option is obsolete; remove it\n"); 74 75 *rcard = NULL; 76 card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0); 77 if (card == NULL) 78 return -ENOMEM; 79 strcpy(card->driver, "MPU-401 UART"); 80 strcpy(card->shortname, card->driver); 81 sprintf(card->longname, "%s at %#lx, ", card->shortname, port[dev]); 82 if (irq[dev] >= 0) { 83 sprintf(card->longname + strlen(card->longname), "irq %d", irq[dev]); 84 } else { 85 strcat(card->longname, "polled"); 86 } 87 88 err = snd_mpu401_uart_new(card, 0, MPU401_HW_MPU401, port[dev], 0, 89 irq[dev], irq[dev] >= 0 ? IRQF_DISABLED : 0, 90 NULL); 91 if (err < 0) { 92 printk(KERN_ERR "MPU401 not detected at 0x%lx\n", port[dev]); 93 goto _err; 94 } 95 96 *rcard = card; 97 return 0; 98 99 _err: 100 snd_card_free(card); 101 return err; 102 } 103 104 static int __devinit snd_mpu401_probe(struct platform_device *devptr) 105 { 106 int dev = devptr->id; 107 int err; 108 struct snd_card *card; 109 110 if (port[dev] == SNDRV_AUTO_PORT) { 111 snd_printk(KERN_ERR "specify port\n"); 112 return -EINVAL; 113 } 114 if (irq[dev] == SNDRV_AUTO_IRQ) { 115 snd_printk(KERN_ERR "specify or disable IRQ\n"); 116 return -EINVAL; 117 } 118 err = snd_mpu401_create(dev, &card); 119 if (err < 0) 120 return err; 121 snd_card_set_dev(card, &devptr->dev); 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 } 129 130 static int __devexit snd_mpu401_remove(struct platform_device *devptr) 131 { 132 snd_card_free(platform_get_drvdata(devptr)); 133 platform_set_drvdata(devptr, NULL); 134 return 0; 135 } 136 137 #define SND_MPU401_DRIVER "snd_mpu401" 138 139 static struct platform_driver snd_mpu401_driver = { 140 .probe = snd_mpu401_probe, 141 .remove = __devexit_p(snd_mpu401_remove), 142 .driver = { 143 .name = SND_MPU401_DRIVER 144 }, 145 }; 146 147 148 #ifdef CONFIG_PNP 149 150 #define IO_EXTENT 2 151 152 static struct pnp_device_id snd_mpu401_pnpids[] = { 153 { .id = "PNPb006" }, 154 { .id = "" } 155 }; 156 157 MODULE_DEVICE_TABLE(pnp, snd_mpu401_pnpids); 158 159 static int __devinit snd_mpu401_pnp(int dev, struct pnp_dev *device, 160 const struct pnp_device_id *id) 161 { 162 if (!pnp_port_valid(device, 0) || 163 pnp_port_flags(device, 0) & IORESOURCE_DISABLED) { 164 snd_printk(KERN_ERR "no PnP port\n"); 165 return -ENODEV; 166 } 167 if (pnp_port_len(device, 0) < IO_EXTENT) { 168 snd_printk(KERN_ERR "PnP port length is %llu, expected %d\n", 169 (unsigned long long)pnp_port_len(device, 0), 170 IO_EXTENT); 171 return -ENODEV; 172 } 173 port[dev] = pnp_port_start(device, 0); 174 175 if (!pnp_irq_valid(device, 0) || 176 pnp_irq_flags(device, 0) & IORESOURCE_DISABLED) { 177 snd_printk(KERN_WARNING "no PnP irq, using polling\n"); 178 irq[dev] = -1; 179 } else { 180 irq[dev] = pnp_irq(device, 0); 181 } 182 return 0; 183 } 184 185 static int __devinit snd_mpu401_pnp_probe(struct pnp_dev *pnp_dev, 186 const struct pnp_device_id *id) 187 { 188 static int dev; 189 struct snd_card *card; 190 int err; 191 192 for ( ; dev < SNDRV_CARDS; ++dev) { 193 if (!enable[dev] || !pnp[dev]) 194 continue; 195 err = snd_mpu401_pnp(dev, pnp_dev, id); 196 if (err < 0) 197 return err; 198 err = snd_mpu401_create(dev, &card); 199 if (err < 0) 200 return err; 201 if ((err = snd_card_register(card)) < 0) { 202 snd_card_free(card); 203 return err; 204 } 205 snd_card_set_dev(card, &pnp_dev->dev); 206 pnp_set_drvdata(pnp_dev, card); 207 snd_mpu401_devices++; 208 ++dev; 209 return 0; 210 } 211 return -ENODEV; 212 } 213 214 static void __devexit snd_mpu401_pnp_remove(struct pnp_dev *dev) 215 { 216 struct snd_card *card = (struct snd_card *) pnp_get_drvdata(dev); 217 218 snd_card_disconnect(card); 219 snd_card_free_when_closed(card); 220 } 221 222 static struct pnp_driver snd_mpu401_pnp_driver = { 223 .name = "mpu401", 224 .id_table = snd_mpu401_pnpids, 225 .probe = snd_mpu401_pnp_probe, 226 .remove = __devexit_p(snd_mpu401_pnp_remove), 227 }; 228 #else 229 static struct pnp_driver snd_mpu401_pnp_driver; 230 #endif 231 232 static void snd_mpu401_unregister_all(void) 233 { 234 int i; 235 236 if (pnp_registered) 237 pnp_unregister_driver(&snd_mpu401_pnp_driver); 238 for (i = 0; i < ARRAY_SIZE(platform_devices); ++i) 239 platform_device_unregister(platform_devices[i]); 240 platform_driver_unregister(&snd_mpu401_driver); 241 } 242 243 static int __init alsa_card_mpu401_init(void) 244 { 245 int i, err; 246 247 if ((err = platform_driver_register(&snd_mpu401_driver)) < 0) 248 return err; 249 250 for (i = 0; i < SNDRV_CARDS; i++) { 251 struct platform_device *device; 252 if (! enable[i]) 253 continue; 254 #ifdef CONFIG_PNP 255 if (pnp[i]) 256 continue; 257 #endif 258 device = platform_device_register_simple(SND_MPU401_DRIVER, 259 i, NULL, 0); 260 if (IS_ERR(device)) 261 continue; 262 if (!platform_get_drvdata(device)) { 263 platform_device_unregister(device); 264 continue; 265 } 266 platform_devices[i] = device; 267 snd_mpu401_devices++; 268 } 269 err = pnp_register_driver(&snd_mpu401_pnp_driver); 270 if (!err) 271 pnp_registered = 1; 272 273 if (!snd_mpu401_devices) { 274 #ifdef MODULE 275 printk(KERN_ERR "MPU-401 device not found or device busy\n"); 276 #endif 277 snd_mpu401_unregister_all(); 278 return -ENODEV; 279 } 280 return 0; 281 } 282 283 static void __exit alsa_card_mpu401_exit(void) 284 { 285 snd_mpu401_unregister_all(); 286 } 287 288 module_init(alsa_card_mpu401_init) 289 module_exit(alsa_card_mpu401_exit) 290