1 /* 2 * Driver for generic MPU-401 boards (UART mode only) 3 * Copyright (c) by Jaroslav Kysela <perex@suse.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/moduleparam.h> 27 #include <sound/core.h> 28 #include <sound/mpu401.h> 29 #include <sound/initval.h> 30 31 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>"); 32 MODULE_DESCRIPTION("MPU-401 UART"); 33 MODULE_LICENSE("GPL"); 34 35 static int index[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = -2}; /* exclude the first card */ 36 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ 37 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE; /* Enable this card */ 38 #ifdef CONFIG_PNP 39 static int pnp[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1}; 40 #endif 41 static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* MPU-401 port number */ 42 static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* MPU-401 IRQ */ 43 44 module_param_array(index, int, NULL, 0444); 45 MODULE_PARM_DESC(index, "Index value for MPU-401 device."); 46 module_param_array(id, charp, NULL, 0444); 47 MODULE_PARM_DESC(id, "ID string for MPU-401 device."); 48 module_param_array(enable, bool, NULL, 0444); 49 MODULE_PARM_DESC(enable, "Enable MPU-401 device."); 50 #ifdef CONFIG_PNP 51 module_param_array(pnp, bool, NULL, 0444); 52 MODULE_PARM_DESC(pnp, "PnP detection for MPU-401 device."); 53 #endif 54 module_param_array(port, long, NULL, 0444); 55 MODULE_PARM_DESC(port, "Port # for MPU-401 device."); 56 module_param_array(irq, int, NULL, 0444); 57 MODULE_PARM_DESC(irq, "IRQ # for MPU-401 device."); 58 59 static snd_card_t *snd_mpu401_legacy_cards[SNDRV_CARDS] = SNDRV_DEFAULT_PTR; 60 static int pnp_registered = 0; 61 62 static int snd_mpu401_create(int dev, snd_card_t **rcard) 63 { 64 snd_card_t *card; 65 int err; 66 67 *rcard = NULL; 68 card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0); 69 if (card == NULL) 70 return -ENOMEM; 71 strcpy(card->driver, "MPU-401 UART"); 72 strcpy(card->shortname, card->driver); 73 sprintf(card->longname, "%s at %#lx, ", card->shortname, port[dev]); 74 if (irq[dev] >= 0) { 75 sprintf(card->longname + strlen(card->longname), "irq %d", irq[dev]); 76 } else { 77 strcat(card->longname, "polled"); 78 } 79 80 if ((err = snd_mpu401_uart_new(card, 0, 81 MPU401_HW_MPU401, 82 port[dev], 0, 83 irq[dev], irq[dev] >= 0 ? SA_INTERRUPT : 0, NULL)) < 0) { 84 printk(KERN_ERR "MPU401 not detected at 0x%lx\n", port[dev]); 85 goto _err; 86 } 87 88 if ((err = snd_card_set_generic_dev(card)) < 0) 89 goto _err; 90 91 if ((err = snd_card_register(card)) < 0) 92 goto _err; 93 94 *rcard = card; 95 return 0; 96 97 _err: 98 snd_card_free(card); 99 return err; 100 } 101 102 static int __devinit snd_mpu401_probe(int dev) 103 { 104 if (port[dev] == SNDRV_AUTO_PORT) { 105 snd_printk(KERN_ERR "specify port\n"); 106 return -EINVAL; 107 } 108 if (irq[dev] == SNDRV_AUTO_IRQ) { 109 snd_printk(KERN_ERR "specify or disable IRQ\n"); 110 return -EINVAL; 111 } 112 return snd_mpu401_create(dev, &snd_mpu401_legacy_cards[dev]); 113 } 114 115 #ifdef CONFIG_PNP 116 117 #define IO_EXTENT 2 118 119 static struct pnp_device_id snd_mpu401_pnpids[] = { 120 { .id = "PNPb006" }, 121 { .id = "" } 122 }; 123 124 MODULE_DEVICE_TABLE(pnp, snd_mpu401_pnpids); 125 126 static int __init snd_mpu401_pnp(int dev, struct pnp_dev *device, 127 const struct pnp_device_id *id) 128 { 129 if (!pnp_port_valid(device, 0) || 130 pnp_port_flags(device, 0) & IORESOURCE_DISABLED) { 131 snd_printk(KERN_ERR "no PnP port\n"); 132 return -ENODEV; 133 } 134 if (pnp_port_len(device, 0) < IO_EXTENT) { 135 snd_printk(KERN_ERR "PnP port length is %ld, expected %d\n", 136 pnp_port_len(device, 0), IO_EXTENT); 137 return -ENODEV; 138 } 139 port[dev] = pnp_port_start(device, 0); 140 141 if (!pnp_irq_valid(device, 0) || 142 pnp_irq_flags(device, 0) & IORESOURCE_DISABLED) { 143 snd_printk(KERN_WARNING "no PnP irq, using polling\n"); 144 irq[dev] = -1; 145 } else { 146 irq[dev] = pnp_irq(device, 0); 147 } 148 return 0; 149 } 150 151 static int __devinit snd_mpu401_pnp_probe(struct pnp_dev *pnp_dev, 152 const struct pnp_device_id *id) 153 { 154 static int dev; 155 snd_card_t *card; 156 int err; 157 158 for ( ; dev < SNDRV_CARDS; ++dev) { 159 if (!enable[dev] || !pnp[dev]) 160 continue; 161 err = snd_mpu401_pnp(dev, pnp_dev, id); 162 if (err < 0) 163 return err; 164 err = snd_mpu401_create(dev, &card); 165 if (err < 0) 166 return err; 167 snd_card_set_dev(card, &pnp_dev->dev); 168 pnp_set_drvdata(pnp_dev, card); 169 ++dev; 170 return 0; 171 } 172 return -ENODEV; 173 } 174 175 static void __devexit snd_mpu401_pnp_remove(struct pnp_dev *dev) 176 { 177 snd_card_t *card = (snd_card_t *) pnp_get_drvdata(dev); 178 179 snd_card_disconnect(card); 180 snd_card_free_in_thread(card); 181 } 182 183 static struct pnp_driver snd_mpu401_pnp_driver = { 184 .name = "mpu401", 185 .id_table = snd_mpu401_pnpids, 186 .probe = snd_mpu401_pnp_probe, 187 .remove = __devexit_p(snd_mpu401_pnp_remove), 188 }; 189 #else 190 static struct pnp_driver snd_mpu401_pnp_driver; 191 #endif 192 193 static int __init alsa_card_mpu401_init(void) 194 { 195 int dev, devices = 0; 196 int err; 197 198 for (dev = 0; dev < SNDRV_CARDS; dev++) { 199 if (!enable[dev]) 200 continue; 201 #ifdef CONFIG_PNP 202 if (pnp[dev]) 203 continue; 204 #endif 205 if (snd_mpu401_probe(dev) >= 0) 206 devices++; 207 } 208 if ((err = pnp_register_driver(&snd_mpu401_pnp_driver)) >= 0) { 209 pnp_registered = 1; 210 devices += err; 211 } 212 213 if (!devices) { 214 #ifdef MODULE 215 printk(KERN_ERR "MPU-401 device not found or device busy\n"); 216 #endif 217 if (pnp_registered) 218 pnp_unregister_driver(&snd_mpu401_pnp_driver); 219 return -ENODEV; 220 } 221 return 0; 222 } 223 224 static void __exit alsa_card_mpu401_exit(void) 225 { 226 int idx; 227 228 if (pnp_registered) 229 pnp_unregister_driver(&snd_mpu401_pnp_driver); 230 for (idx = 0; idx < SNDRV_CARDS; idx++) 231 snd_card_free(snd_mpu401_legacy_cards[idx]); 232 } 233 234 module_init(alsa_card_mpu401_init) 235 module_exit(alsa_card_mpu401_exit) 236