Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Jaroslav Kysela | c1017a4 | 2007-10-15 09:50:19 +0200 | [diff] [blame] | 2 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * Routines for control of MPU-401 in UART mode |
| 4 | * |
| 5 | * MPU-401 supports UART mode which is not capable generate transmit |
| 6 | * interrupts thus output is done via polling. Also, if irq < 0, then |
| 7 | * input is done also via polling. Do not expect good performance. |
| 8 | * |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License as published by |
| 12 | * the Free Software Foundation; either version 2 of the License, or |
| 13 | * (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * GNU General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with this program; if not, write to the Free Software |
| 22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 23 | * |
| 24 | * 13-03-2003: |
| 25 | * Added support for different kind of hardware I/O. Build in choices |
| 26 | * are port and mmio. For other kind of I/O, set mpu->read and |
| 27 | * mpu->write to your own I/O functions. |
| 28 | * |
| 29 | */ |
| 30 | |
| 31 | #include <sound/driver.h> |
| 32 | #include <asm/io.h> |
| 33 | #include <linux/delay.h> |
| 34 | #include <linux/init.h> |
| 35 | #include <linux/slab.h> |
| 36 | #include <linux/ioport.h> |
| 37 | #include <linux/interrupt.h> |
| 38 | #include <linux/errno.h> |
| 39 | #include <sound/core.h> |
| 40 | #include <sound/mpu401.h> |
| 41 | |
Jaroslav Kysela | c1017a4 | 2007-10-15 09:50:19 +0200 | [diff] [blame] | 42 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | MODULE_DESCRIPTION("Routines for control of MPU-401 in UART mode"); |
| 44 | MODULE_LICENSE("GPL"); |
| 45 | |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 46 | static void snd_mpu401_uart_input_read(struct snd_mpu401 * mpu); |
| 47 | static void snd_mpu401_uart_output_write(struct snd_mpu401 * mpu); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
| 49 | /* |
| 50 | |
| 51 | */ |
| 52 | |
| 53 | #define snd_mpu401_input_avail(mpu) (!(mpu->read(mpu, MPU401C(mpu)) & 0x80)) |
| 54 | #define snd_mpu401_output_ready(mpu) (!(mpu->read(mpu, MPU401C(mpu)) & 0x40)) |
| 55 | |
| 56 | #define MPU401_RESET 0xff |
| 57 | #define MPU401_ENTER_UART 0x3f |
| 58 | #define MPU401_ACK 0xfe |
| 59 | |
| 60 | /* Build in lowlevel io */ |
Takashi Iwai | 2851d96 | 2006-05-18 14:48:26 +0200 | [diff] [blame] | 61 | static void mpu401_write_port(struct snd_mpu401 *mpu, unsigned char data, |
| 62 | unsigned long addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | { |
| 64 | outb(data, addr); |
| 65 | } |
| 66 | |
Takashi Iwai | 2851d96 | 2006-05-18 14:48:26 +0200 | [diff] [blame] | 67 | static unsigned char mpu401_read_port(struct snd_mpu401 *mpu, |
| 68 | unsigned long addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | { |
| 70 | return inb(addr); |
| 71 | } |
| 72 | |
Takashi Iwai | 2851d96 | 2006-05-18 14:48:26 +0200 | [diff] [blame] | 73 | static void mpu401_write_mmio(struct snd_mpu401 *mpu, unsigned char data, |
| 74 | unsigned long addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | { |
| 76 | writeb(data, (void __iomem *)addr); |
| 77 | } |
| 78 | |
Takashi Iwai | 2851d96 | 2006-05-18 14:48:26 +0200 | [diff] [blame] | 79 | static unsigned char mpu401_read_mmio(struct snd_mpu401 *mpu, |
| 80 | unsigned long addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | { |
| 82 | return readb((void __iomem *)addr); |
| 83 | } |
| 84 | /* */ |
| 85 | |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 86 | static void snd_mpu401_uart_clear_rx(struct snd_mpu401 *mpu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | { |
| 88 | int timeout = 100000; |
| 89 | for (; timeout > 0 && snd_mpu401_input_avail(mpu); timeout--) |
| 90 | mpu->read(mpu, MPU401D(mpu)); |
| 91 | #ifdef CONFIG_SND_DEBUG |
| 92 | if (timeout <= 0) |
Takashi Iwai | 2851d96 | 2006-05-18 14:48:26 +0200 | [diff] [blame] | 93 | snd_printk(KERN_ERR "cmd: clear rx timeout (status = 0x%x)\n", |
| 94 | mpu->read(mpu, MPU401C(mpu))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | #endif |
| 96 | } |
| 97 | |
Takashi Iwai | 302e4c2 | 2006-05-23 13:24:30 +0200 | [diff] [blame] | 98 | static void uart_interrupt_tx(struct snd_mpu401 *mpu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | { |
Clemens Ladisch | 60fac85 | 2007-11-12 08:47:57 +0100 | [diff] [blame] | 100 | unsigned long flags; |
| 101 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | if (test_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode) && |
| 103 | test_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode)) { |
Clemens Ladisch | 60fac85 | 2007-11-12 08:47:57 +0100 | [diff] [blame] | 104 | spin_lock_irqsave(&mpu->output_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | snd_mpu401_uart_output_write(mpu); |
Clemens Ladisch | 60fac85 | 2007-11-12 08:47:57 +0100 | [diff] [blame] | 106 | spin_unlock_irqrestore(&mpu->output_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | } |
| 108 | } |
| 109 | |
Takashi Iwai | 302e4c2 | 2006-05-23 13:24:30 +0200 | [diff] [blame] | 110 | static void _snd_mpu401_uart_interrupt(struct snd_mpu401 *mpu) |
| 111 | { |
Clemens Ladisch | 60fac85 | 2007-11-12 08:47:57 +0100 | [diff] [blame] | 112 | unsigned long flags; |
| 113 | |
Takashi Iwai | 302e4c2 | 2006-05-23 13:24:30 +0200 | [diff] [blame] | 114 | if (mpu->info_flags & MPU401_INFO_INPUT) { |
Clemens Ladisch | 60fac85 | 2007-11-12 08:47:57 +0100 | [diff] [blame] | 115 | spin_lock_irqsave(&mpu->input_lock, flags); |
Takashi Iwai | 302e4c2 | 2006-05-23 13:24:30 +0200 | [diff] [blame] | 116 | if (test_bit(MPU401_MODE_BIT_INPUT, &mpu->mode)) |
| 117 | snd_mpu401_uart_input_read(mpu); |
| 118 | else |
| 119 | snd_mpu401_uart_clear_rx(mpu); |
Clemens Ladisch | 60fac85 | 2007-11-12 08:47:57 +0100 | [diff] [blame] | 120 | spin_unlock_irqrestore(&mpu->input_lock, flags); |
Takashi Iwai | 302e4c2 | 2006-05-23 13:24:30 +0200 | [diff] [blame] | 121 | } |
| 122 | if (! (mpu->info_flags & MPU401_INFO_TX_IRQ)) |
| 123 | /* ok. for better Tx performance try do some output |
| 124 | when input is done */ |
| 125 | uart_interrupt_tx(mpu); |
| 126 | } |
| 127 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | /** |
| 129 | * snd_mpu401_uart_interrupt - generic MPU401-UART interrupt handler |
| 130 | * @irq: the irq number |
| 131 | * @dev_id: mpu401 instance |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | * |
| 133 | * Processes the interrupt for MPU401-UART i/o. |
| 134 | */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 135 | irqreturn_t snd_mpu401_uart_interrupt(int irq, void *dev_id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | { |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 137 | struct snd_mpu401 *mpu = dev_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | |
| 139 | if (mpu == NULL) |
| 140 | return IRQ_NONE; |
| 141 | _snd_mpu401_uart_interrupt(mpu); |
| 142 | return IRQ_HANDLED; |
| 143 | } |
| 144 | |
Takashi Iwai | 2851d96 | 2006-05-18 14:48:26 +0200 | [diff] [blame] | 145 | EXPORT_SYMBOL(snd_mpu401_uart_interrupt); |
| 146 | |
Takashi Iwai | 302e4c2 | 2006-05-23 13:24:30 +0200 | [diff] [blame] | 147 | /** |
| 148 | * snd_mpu401_uart_interrupt_tx - generic MPU401-UART transmit irq handler |
| 149 | * @irq: the irq number |
| 150 | * @dev_id: mpu401 instance |
Takashi Iwai | 302e4c2 | 2006-05-23 13:24:30 +0200 | [diff] [blame] | 151 | * |
| 152 | * Processes the interrupt for MPU401-UART output. |
| 153 | */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 154 | irqreturn_t snd_mpu401_uart_interrupt_tx(int irq, void *dev_id) |
Takashi Iwai | 302e4c2 | 2006-05-23 13:24:30 +0200 | [diff] [blame] | 155 | { |
| 156 | struct snd_mpu401 *mpu = dev_id; |
| 157 | |
| 158 | if (mpu == NULL) |
| 159 | return IRQ_NONE; |
| 160 | uart_interrupt_tx(mpu); |
| 161 | return IRQ_HANDLED; |
| 162 | } |
| 163 | |
| 164 | EXPORT_SYMBOL(snd_mpu401_uart_interrupt_tx); |
| 165 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | /* |
| 167 | * timer callback |
| 168 | * reprogram the timer and call the interrupt job |
| 169 | */ |
| 170 | static void snd_mpu401_uart_timer(unsigned long data) |
| 171 | { |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 172 | struct snd_mpu401 *mpu = (struct snd_mpu401 *)data; |
Takashi Iwai | b32425a | 2005-11-18 18:52:14 +0100 | [diff] [blame] | 173 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | |
Takashi Iwai | b32425a | 2005-11-18 18:52:14 +0100 | [diff] [blame] | 175 | spin_lock_irqsave(&mpu->timer_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | /*mpu->mode |= MPU401_MODE_TIMER;*/ |
| 177 | mpu->timer.expires = 1 + jiffies; |
| 178 | add_timer(&mpu->timer); |
Takashi Iwai | b32425a | 2005-11-18 18:52:14 +0100 | [diff] [blame] | 179 | spin_unlock_irqrestore(&mpu->timer_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | if (mpu->rmidi) |
| 181 | _snd_mpu401_uart_interrupt(mpu); |
| 182 | } |
| 183 | |
| 184 | /* |
| 185 | * initialize the timer callback if not programmed yet |
| 186 | */ |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 187 | static void snd_mpu401_uart_add_timer (struct snd_mpu401 *mpu, int input) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | { |
| 189 | unsigned long flags; |
| 190 | |
| 191 | spin_lock_irqsave (&mpu->timer_lock, flags); |
| 192 | if (mpu->timer_invoked == 0) { |
| 193 | init_timer(&mpu->timer); |
| 194 | mpu->timer.data = (unsigned long)mpu; |
| 195 | mpu->timer.function = snd_mpu401_uart_timer; |
| 196 | mpu->timer.expires = 1 + jiffies; |
| 197 | add_timer(&mpu->timer); |
| 198 | } |
Takashi Iwai | 2851d96 | 2006-05-18 14:48:26 +0200 | [diff] [blame] | 199 | mpu->timer_invoked |= input ? MPU401_MODE_INPUT_TIMER : |
| 200 | MPU401_MODE_OUTPUT_TIMER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | spin_unlock_irqrestore (&mpu->timer_lock, flags); |
| 202 | } |
| 203 | |
| 204 | /* |
| 205 | * remove the timer callback if still active |
| 206 | */ |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 207 | static void snd_mpu401_uart_remove_timer (struct snd_mpu401 *mpu, int input) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | { |
| 209 | unsigned long flags; |
| 210 | |
| 211 | spin_lock_irqsave (&mpu->timer_lock, flags); |
| 212 | if (mpu->timer_invoked) { |
Takashi Iwai | 2851d96 | 2006-05-18 14:48:26 +0200 | [diff] [blame] | 213 | mpu->timer_invoked &= input ? ~MPU401_MODE_INPUT_TIMER : |
| 214 | ~MPU401_MODE_OUTPUT_TIMER; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | if (! mpu->timer_invoked) |
| 216 | del_timer(&mpu->timer); |
| 217 | } |
| 218 | spin_unlock_irqrestore (&mpu->timer_lock, flags); |
| 219 | } |
| 220 | |
| 221 | /* |
Takashi Iwai | 2851d96 | 2006-05-18 14:48:26 +0200 | [diff] [blame] | 222 | * send a UART command |
| 223 | * return zero if successful, non-zero for some errors |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | */ |
| 225 | |
Jon Masters | 962f831 | 2006-04-20 02:43:20 -0700 | [diff] [blame] | 226 | static int snd_mpu401_uart_cmd(struct snd_mpu401 * mpu, unsigned char cmd, |
Takashi Iwai | 2851d96 | 2006-05-18 14:48:26 +0200 | [diff] [blame] | 227 | int ack) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | { |
| 229 | unsigned long flags; |
| 230 | int timeout, ok; |
| 231 | |
| 232 | spin_lock_irqsave(&mpu->input_lock, flags); |
| 233 | if (mpu->hardware != MPU401_HW_TRID4DWAVE) { |
| 234 | mpu->write(mpu, 0x00, MPU401D(mpu)); |
| 235 | /*snd_mpu401_uart_clear_rx(mpu);*/ |
| 236 | } |
| 237 | /* ok. standard MPU-401 initialization */ |
| 238 | if (mpu->hardware != MPU401_HW_SB) { |
Takashi Iwai | 2851d96 | 2006-05-18 14:48:26 +0200 | [diff] [blame] | 239 | for (timeout = 1000; timeout > 0 && |
| 240 | !snd_mpu401_output_ready(mpu); timeout--) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | udelay(10); |
| 242 | #ifdef CONFIG_SND_DEBUG |
| 243 | if (!timeout) |
Takashi Iwai | 2851d96 | 2006-05-18 14:48:26 +0200 | [diff] [blame] | 244 | snd_printk(KERN_ERR "cmd: tx timeout (status = 0x%x)\n", |
| 245 | mpu->read(mpu, MPU401C(mpu))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | #endif |
| 247 | } |
| 248 | mpu->write(mpu, cmd, MPU401C(mpu)); |
| 249 | if (ack) { |
| 250 | ok = 0; |
| 251 | timeout = 10000; |
| 252 | while (!ok && timeout-- > 0) { |
| 253 | if (snd_mpu401_input_avail(mpu)) { |
| 254 | if (mpu->read(mpu, MPU401D(mpu)) == MPU401_ACK) |
| 255 | ok = 1; |
| 256 | } |
| 257 | } |
| 258 | if (!ok && mpu->read(mpu, MPU401D(mpu)) == MPU401_ACK) |
| 259 | ok = 1; |
Takashi Iwai | 2851d96 | 2006-05-18 14:48:26 +0200 | [diff] [blame] | 260 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | ok = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | spin_unlock_irqrestore(&mpu->input_lock, flags); |
Jon Masters | 962f831 | 2006-04-20 02:43:20 -0700 | [diff] [blame] | 263 | if (!ok) { |
Takashi Iwai | 2851d96 | 2006-05-18 14:48:26 +0200 | [diff] [blame] | 264 | snd_printk(KERN_ERR "cmd: 0x%x failed at 0x%lx " |
| 265 | "(status = 0x%x, data = 0x%x)\n", cmd, mpu->port, |
| 266 | mpu->read(mpu, MPU401C(mpu)), |
| 267 | mpu->read(mpu, MPU401D(mpu))); |
Jon Masters | 962f831 | 2006-04-20 02:43:20 -0700 | [diff] [blame] | 268 | return 1; |
| 269 | } |
| 270 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | } |
| 272 | |
Takashi Iwai | 8f7ba05 | 2007-02-22 16:07:21 +0100 | [diff] [blame] | 273 | static int snd_mpu401_do_reset(struct snd_mpu401 *mpu) |
| 274 | { |
| 275 | if (snd_mpu401_uart_cmd(mpu, MPU401_RESET, 1)) |
| 276 | return -EIO; |
Clemens Ladisch | c1099fc | 2007-10-11 14:42:23 +0200 | [diff] [blame] | 277 | if (snd_mpu401_uart_cmd(mpu, MPU401_ENTER_UART, 0)) |
Takashi Iwai | 8f7ba05 | 2007-02-22 16:07:21 +0100 | [diff] [blame] | 278 | return -EIO; |
| 279 | return 0; |
| 280 | } |
| 281 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | /* |
| 283 | * input/output open/close - protected by open_mutex in rawmidi.c |
| 284 | */ |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 285 | static int snd_mpu401_uart_input_open(struct snd_rawmidi_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | { |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 287 | struct snd_mpu401 *mpu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | int err; |
| 289 | |
| 290 | mpu = substream->rmidi->private_data; |
| 291 | if (mpu->open_input && (err = mpu->open_input(mpu)) < 0) |
| 292 | return err; |
| 293 | if (! test_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode)) { |
Takashi Iwai | 8f7ba05 | 2007-02-22 16:07:21 +0100 | [diff] [blame] | 294 | if (snd_mpu401_do_reset(mpu) < 0) |
Jon Masters | 962f831 | 2006-04-20 02:43:20 -0700 | [diff] [blame] | 295 | goto error_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | } |
| 297 | mpu->substream_input = substream; |
| 298 | set_bit(MPU401_MODE_BIT_INPUT, &mpu->mode); |
| 299 | return 0; |
Jon Masters | 962f831 | 2006-04-20 02:43:20 -0700 | [diff] [blame] | 300 | |
| 301 | error_out: |
| 302 | if (mpu->open_input && mpu->close_input) |
| 303 | mpu->close_input(mpu); |
| 304 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | } |
| 306 | |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 307 | static int snd_mpu401_uart_output_open(struct snd_rawmidi_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | { |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 309 | struct snd_mpu401 *mpu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | int err; |
| 311 | |
| 312 | mpu = substream->rmidi->private_data; |
| 313 | if (mpu->open_output && (err = mpu->open_output(mpu)) < 0) |
| 314 | return err; |
| 315 | if (! test_bit(MPU401_MODE_BIT_INPUT, &mpu->mode)) { |
Takashi Iwai | 8f7ba05 | 2007-02-22 16:07:21 +0100 | [diff] [blame] | 316 | if (snd_mpu401_do_reset(mpu) < 0) |
Jon Masters | 962f831 | 2006-04-20 02:43:20 -0700 | [diff] [blame] | 317 | goto error_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | } |
| 319 | mpu->substream_output = substream; |
| 320 | set_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode); |
| 321 | return 0; |
Jon Masters | 962f831 | 2006-04-20 02:43:20 -0700 | [diff] [blame] | 322 | |
| 323 | error_out: |
| 324 | if (mpu->open_output && mpu->close_output) |
| 325 | mpu->close_output(mpu); |
| 326 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | } |
| 328 | |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 329 | static int snd_mpu401_uart_input_close(struct snd_rawmidi_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | { |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 331 | struct snd_mpu401 *mpu; |
Jon Masters | 962f831 | 2006-04-20 02:43:20 -0700 | [diff] [blame] | 332 | int err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | |
| 334 | mpu = substream->rmidi->private_data; |
| 335 | clear_bit(MPU401_MODE_BIT_INPUT, &mpu->mode); |
| 336 | mpu->substream_input = NULL; |
| 337 | if (! test_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode)) |
Jon Masters | 962f831 | 2006-04-20 02:43:20 -0700 | [diff] [blame] | 338 | err = snd_mpu401_uart_cmd(mpu, MPU401_RESET, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | if (mpu->close_input) |
| 340 | mpu->close_input(mpu); |
Jon Masters | 962f831 | 2006-04-20 02:43:20 -0700 | [diff] [blame] | 341 | if (err) |
| 342 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | return 0; |
| 344 | } |
| 345 | |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 346 | static int snd_mpu401_uart_output_close(struct snd_rawmidi_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | { |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 348 | struct snd_mpu401 *mpu; |
Jon Masters | 962f831 | 2006-04-20 02:43:20 -0700 | [diff] [blame] | 349 | int err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | |
| 351 | mpu = substream->rmidi->private_data; |
| 352 | clear_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode); |
| 353 | mpu->substream_output = NULL; |
| 354 | if (! test_bit(MPU401_MODE_BIT_INPUT, &mpu->mode)) |
Jon Masters | 962f831 | 2006-04-20 02:43:20 -0700 | [diff] [blame] | 355 | err = snd_mpu401_uart_cmd(mpu, MPU401_RESET, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | if (mpu->close_output) |
| 357 | mpu->close_output(mpu); |
Jon Masters | 962f831 | 2006-04-20 02:43:20 -0700 | [diff] [blame] | 358 | if (err) |
| 359 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | return 0; |
| 361 | } |
| 362 | |
| 363 | /* |
| 364 | * trigger input callback |
| 365 | */ |
Takashi Iwai | 2851d96 | 2006-05-18 14:48:26 +0200 | [diff] [blame] | 366 | static void |
| 367 | snd_mpu401_uart_input_trigger(struct snd_rawmidi_substream *substream, int up) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | { |
| 369 | unsigned long flags; |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 370 | struct snd_mpu401 *mpu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | int max = 64; |
| 372 | |
| 373 | mpu = substream->rmidi->private_data; |
| 374 | if (up) { |
Takashi Iwai | 2851d96 | 2006-05-18 14:48:26 +0200 | [diff] [blame] | 375 | if (! test_and_set_bit(MPU401_MODE_BIT_INPUT_TRIGGER, |
| 376 | &mpu->mode)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | /* first time - flush FIFO */ |
| 378 | while (max-- > 0) |
| 379 | mpu->read(mpu, MPU401D(mpu)); |
| 380 | if (mpu->irq < 0) |
| 381 | snd_mpu401_uart_add_timer(mpu, 1); |
| 382 | } |
| 383 | |
| 384 | /* read data in advance */ |
| 385 | spin_lock_irqsave(&mpu->input_lock, flags); |
| 386 | snd_mpu401_uart_input_read(mpu); |
| 387 | spin_unlock_irqrestore(&mpu->input_lock, flags); |
| 388 | } else { |
| 389 | if (mpu->irq < 0) |
| 390 | snd_mpu401_uart_remove_timer(mpu, 1); |
| 391 | clear_bit(MPU401_MODE_BIT_INPUT_TRIGGER, &mpu->mode); |
| 392 | } |
Jon Masters | 962f831 | 2006-04-20 02:43:20 -0700 | [diff] [blame] | 393 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | } |
| 395 | |
| 396 | /* |
| 397 | * transfer input pending data |
| 398 | * call with input_lock spinlock held |
| 399 | */ |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 400 | static void snd_mpu401_uart_input_read(struct snd_mpu401 * mpu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 401 | { |
| 402 | int max = 128; |
| 403 | unsigned char byte; |
| 404 | |
| 405 | while (max-- > 0) { |
Takashi Iwai | 2851d96 | 2006-05-18 14:48:26 +0200 | [diff] [blame] | 406 | if (! snd_mpu401_input_avail(mpu)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | break; /* input not available */ |
Takashi Iwai | 2851d96 | 2006-05-18 14:48:26 +0200 | [diff] [blame] | 408 | byte = mpu->read(mpu, MPU401D(mpu)); |
| 409 | if (test_bit(MPU401_MODE_BIT_INPUT_TRIGGER, &mpu->mode)) |
| 410 | snd_rawmidi_receive(mpu->substream_input, &byte, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | } |
| 412 | } |
| 413 | |
| 414 | /* |
| 415 | * Tx FIFO sizes: |
| 416 | * CS4237B - 16 bytes |
| 417 | * AudioDrive ES1688 - 12 bytes |
| 418 | * S3 SonicVibes - 8 bytes |
| 419 | * SoundBlaster AWE 64 - 2 bytes (ugly hardware) |
| 420 | */ |
| 421 | |
| 422 | /* |
| 423 | * write output pending bytes |
| 424 | * call with output_lock spinlock held |
| 425 | */ |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 426 | static void snd_mpu401_uart_output_write(struct snd_mpu401 * mpu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | { |
| 428 | unsigned char byte; |
| 429 | int max = 256, timeout; |
| 430 | |
| 431 | do { |
Takashi Iwai | 2851d96 | 2006-05-18 14:48:26 +0200 | [diff] [blame] | 432 | if (snd_rawmidi_transmit_peek(mpu->substream_output, |
| 433 | &byte, 1) == 1) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | for (timeout = 100; timeout > 0; timeout--) { |
Takashi Iwai | 2851d96 | 2006-05-18 14:48:26 +0200 | [diff] [blame] | 435 | if (snd_mpu401_output_ready(mpu)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | } |
| 438 | if (timeout == 0) |
| 439 | break; /* Tx FIFO full - try again later */ |
Takashi Iwai | 2851d96 | 2006-05-18 14:48:26 +0200 | [diff] [blame] | 440 | mpu->write(mpu, byte, MPU401D(mpu)); |
| 441 | snd_rawmidi_transmit_ack(mpu->substream_output, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | } else { |
| 443 | snd_mpu401_uart_remove_timer (mpu, 0); |
| 444 | break; /* no other data - leave the tx loop */ |
| 445 | } |
| 446 | } while (--max > 0); |
| 447 | } |
| 448 | |
| 449 | /* |
| 450 | * output trigger callback |
| 451 | */ |
Takashi Iwai | 2851d96 | 2006-05-18 14:48:26 +0200 | [diff] [blame] | 452 | static void |
| 453 | snd_mpu401_uart_output_trigger(struct snd_rawmidi_substream *substream, int up) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | { |
| 455 | unsigned long flags; |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 456 | struct snd_mpu401 *mpu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | |
| 458 | mpu = substream->rmidi->private_data; |
| 459 | if (up) { |
| 460 | set_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode); |
| 461 | |
| 462 | /* try to add the timer at each output trigger, |
| 463 | * since the output timer might have been removed in |
| 464 | * snd_mpu401_uart_output_write(). |
| 465 | */ |
Takashi Iwai | 302e4c2 | 2006-05-23 13:24:30 +0200 | [diff] [blame] | 466 | if (! (mpu->info_flags & MPU401_INFO_TX_IRQ)) |
| 467 | snd_mpu401_uart_add_timer(mpu, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | |
| 469 | /* output pending data */ |
| 470 | spin_lock_irqsave(&mpu->output_lock, flags); |
| 471 | snd_mpu401_uart_output_write(mpu); |
| 472 | spin_unlock_irqrestore(&mpu->output_lock, flags); |
| 473 | } else { |
Takashi Iwai | 302e4c2 | 2006-05-23 13:24:30 +0200 | [diff] [blame] | 474 | if (! (mpu->info_flags & MPU401_INFO_TX_IRQ)) |
| 475 | snd_mpu401_uart_remove_timer(mpu, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | clear_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode); |
| 477 | } |
| 478 | } |
| 479 | |
| 480 | /* |
| 481 | |
| 482 | */ |
| 483 | |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 484 | static struct snd_rawmidi_ops snd_mpu401_uart_output = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | { |
| 486 | .open = snd_mpu401_uart_output_open, |
| 487 | .close = snd_mpu401_uart_output_close, |
| 488 | .trigger = snd_mpu401_uart_output_trigger, |
| 489 | }; |
| 490 | |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 491 | static struct snd_rawmidi_ops snd_mpu401_uart_input = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | { |
| 493 | .open = snd_mpu401_uart_input_open, |
| 494 | .close = snd_mpu401_uart_input_close, |
| 495 | .trigger = snd_mpu401_uart_input_trigger, |
| 496 | }; |
| 497 | |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 498 | static void snd_mpu401_uart_free(struct snd_rawmidi *rmidi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | { |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 500 | struct snd_mpu401 *mpu = rmidi->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | if (mpu->irq_flags && mpu->irq >= 0) |
| 502 | free_irq(mpu->irq, (void *) mpu); |
Takashi Iwai | b1d5776 | 2005-10-10 11:56:31 +0200 | [diff] [blame] | 503 | release_and_free_resource(mpu->res); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | kfree(mpu); |
| 505 | } |
| 506 | |
| 507 | /** |
| 508 | * snd_mpu401_uart_new - create an MPU401-UART instance |
| 509 | * @card: the card instance |
| 510 | * @device: the device index, zero-based |
| 511 | * @hardware: the hardware type, MPU401_HW_XXXX |
| 512 | * @port: the base address of MPU401 port |
Takashi Iwai | 302e4c2 | 2006-05-23 13:24:30 +0200 | [diff] [blame] | 513 | * @info_flags: bitflags MPU401_INFO_XXX |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 514 | * @irq: the irq number, -1 if no interrupt for mpu |
| 515 | * @irq_flags: the irq request flags (SA_XXX), 0 if irq was already reserved. |
| 516 | * @rrawmidi: the pointer to store the new rawmidi instance |
| 517 | * |
| 518 | * Creates a new MPU-401 instance. |
| 519 | * |
| 520 | * Note that the rawmidi instance is returned on the rrawmidi argument, |
| 521 | * not the mpu401 instance itself. To access to the mpu401 instance, |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 522 | * cast from rawmidi->private_data (with struct snd_mpu401 magic-cast). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | * |
| 524 | * Returns zero if successful, or a negative error code. |
| 525 | */ |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 526 | int snd_mpu401_uart_new(struct snd_card *card, int device, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | unsigned short hardware, |
Takashi Iwai | 302e4c2 | 2006-05-23 13:24:30 +0200 | [diff] [blame] | 528 | unsigned long port, |
| 529 | unsigned int info_flags, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | int irq, int irq_flags, |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 531 | struct snd_rawmidi ** rrawmidi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | { |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 533 | struct snd_mpu401 *mpu; |
| 534 | struct snd_rawmidi *rmidi; |
Takashi Iwai | 302e4c2 | 2006-05-23 13:24:30 +0200 | [diff] [blame] | 535 | int in_enable, out_enable; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | int err; |
| 537 | |
| 538 | if (rrawmidi) |
| 539 | *rrawmidi = NULL; |
Takashi Iwai | 302e4c2 | 2006-05-23 13:24:30 +0200 | [diff] [blame] | 540 | if (! (info_flags & (MPU401_INFO_INPUT | MPU401_INFO_OUTPUT))) |
| 541 | info_flags |= MPU401_INFO_INPUT | MPU401_INFO_OUTPUT; |
| 542 | in_enable = (info_flags & MPU401_INFO_INPUT) ? 1 : 0; |
| 543 | out_enable = (info_flags & MPU401_INFO_OUTPUT) ? 1 : 0; |
| 544 | if ((err = snd_rawmidi_new(card, "MPU-401U", device, |
| 545 | out_enable, in_enable, &rmidi)) < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | return err; |
Takashi Iwai | 561b220 | 2005-09-09 14:22:34 +0200 | [diff] [blame] | 547 | mpu = kzalloc(sizeof(*mpu), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | if (mpu == NULL) { |
Takashi Iwai | 73e77ba | 2005-11-17 17:44:01 +0100 | [diff] [blame] | 549 | snd_printk(KERN_ERR "mpu401_uart: cannot allocate\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | snd_device_free(card, rmidi); |
| 551 | return -ENOMEM; |
| 552 | } |
| 553 | rmidi->private_data = mpu; |
| 554 | rmidi->private_free = snd_mpu401_uart_free; |
| 555 | spin_lock_init(&mpu->input_lock); |
| 556 | spin_lock_init(&mpu->output_lock); |
| 557 | spin_lock_init(&mpu->timer_lock); |
| 558 | mpu->hardware = hardware; |
Takashi Iwai | 302e4c2 | 2006-05-23 13:24:30 +0200 | [diff] [blame] | 559 | if (! (info_flags & MPU401_INFO_INTEGRATED)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | int res_size = hardware == MPU401_HW_PC98II ? 4 : 2; |
Takashi Iwai | 2851d96 | 2006-05-18 14:48:26 +0200 | [diff] [blame] | 561 | mpu->res = request_region(port, res_size, "MPU401 UART"); |
| 562 | if (mpu->res == NULL) { |
| 563 | snd_printk(KERN_ERR "mpu401_uart: " |
| 564 | "unable to grab port 0x%lx size %d\n", |
| 565 | port, res_size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | snd_device_free(card, rmidi); |
| 567 | return -EBUSY; |
| 568 | } |
| 569 | } |
Takashi Iwai | 302e4c2 | 2006-05-23 13:24:30 +0200 | [diff] [blame] | 570 | if (info_flags & MPU401_INFO_MMIO) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | mpu->write = mpu401_write_mmio; |
| 572 | mpu->read = mpu401_read_mmio; |
Takashi Iwai | 302e4c2 | 2006-05-23 13:24:30 +0200 | [diff] [blame] | 573 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | mpu->write = mpu401_write_port; |
| 575 | mpu->read = mpu401_read_port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | } |
| 577 | mpu->port = port; |
| 578 | if (hardware == MPU401_HW_PC98II) |
| 579 | mpu->cport = port + 2; |
| 580 | else |
| 581 | mpu->cport = port + 1; |
| 582 | if (irq >= 0 && irq_flags) { |
Takashi Iwai | 2851d96 | 2006-05-18 14:48:26 +0200 | [diff] [blame] | 583 | if (request_irq(irq, snd_mpu401_uart_interrupt, irq_flags, |
| 584 | "MPU401 UART", (void *) mpu)) { |
| 585 | snd_printk(KERN_ERR "mpu401_uart: " |
| 586 | "unable to grab IRQ %d\n", irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | snd_device_free(card, rmidi); |
| 588 | return -EBUSY; |
| 589 | } |
| 590 | } |
Takashi Iwai | 302e4c2 | 2006-05-23 13:24:30 +0200 | [diff] [blame] | 591 | mpu->info_flags = info_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | mpu->irq = irq; |
| 593 | mpu->irq_flags = irq_flags; |
| 594 | if (card->shortname[0]) |
Takashi Iwai | 2851d96 | 2006-05-18 14:48:26 +0200 | [diff] [blame] | 595 | snprintf(rmidi->name, sizeof(rmidi->name), "%s MIDI", |
| 596 | card->shortname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | else |
Takashi Iwai | 2851d96 | 2006-05-18 14:48:26 +0200 | [diff] [blame] | 598 | sprintf(rmidi->name, "MPU-401 MIDI %d-%d",card->number, device); |
Takashi Iwai | 302e4c2 | 2006-05-23 13:24:30 +0200 | [diff] [blame] | 599 | if (out_enable) { |
| 600 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, |
| 601 | &snd_mpu401_uart_output); |
| 602 | rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT; |
| 603 | } |
| 604 | if (in_enable) { |
| 605 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, |
| 606 | &snd_mpu401_uart_input); |
| 607 | rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT; |
| 608 | if (out_enable) |
| 609 | rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX; |
| 610 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | mpu->rmidi = rmidi; |
| 612 | if (rrawmidi) |
| 613 | *rrawmidi = rmidi; |
| 614 | return 0; |
| 615 | } |
| 616 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 617 | EXPORT_SYMBOL(snd_mpu401_uart_new); |
| 618 | |
| 619 | /* |
| 620 | * INIT part |
| 621 | */ |
| 622 | |
| 623 | static int __init alsa_mpu401_uart_init(void) |
| 624 | { |
| 625 | return 0; |
| 626 | } |
| 627 | |
| 628 | static void __exit alsa_mpu401_uart_exit(void) |
| 629 | { |
| 630 | } |
| 631 | |
| 632 | module_init(alsa_mpu401_uart_init) |
| 633 | module_exit(alsa_mpu401_uart_exit) |