Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) by Jaroslav Kysela <perex@suse.cz> |
| 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 | |
| 42 | MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>"); |
| 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 | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 61 | static void mpu401_write_port(struct snd_mpu401 *mpu, unsigned char data, unsigned long addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | { |
| 63 | outb(data, addr); |
| 64 | } |
| 65 | |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 66 | static unsigned char mpu401_read_port(struct snd_mpu401 *mpu, unsigned long addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | { |
| 68 | return inb(addr); |
| 69 | } |
| 70 | |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 71 | static void mpu401_write_mmio(struct snd_mpu401 *mpu, unsigned char data, unsigned long addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | { |
| 73 | writeb(data, (void __iomem *)addr); |
| 74 | } |
| 75 | |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 76 | static unsigned char mpu401_read_mmio(struct snd_mpu401 *mpu, unsigned long addr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | { |
| 78 | return readb((void __iomem *)addr); |
| 79 | } |
| 80 | /* */ |
| 81 | |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 82 | static void snd_mpu401_uart_clear_rx(struct snd_mpu401 *mpu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | { |
| 84 | int timeout = 100000; |
| 85 | for (; timeout > 0 && snd_mpu401_input_avail(mpu); timeout--) |
| 86 | mpu->read(mpu, MPU401D(mpu)); |
| 87 | #ifdef CONFIG_SND_DEBUG |
| 88 | if (timeout <= 0) |
| 89 | snd_printk("cmd: clear rx timeout (status = 0x%x)\n", mpu->read(mpu, MPU401C(mpu))); |
| 90 | #endif |
| 91 | } |
| 92 | |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 93 | static void _snd_mpu401_uart_interrupt(struct snd_mpu401 *mpu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | { |
| 95 | spin_lock(&mpu->input_lock); |
| 96 | if (test_bit(MPU401_MODE_BIT_INPUT, &mpu->mode)) { |
| 97 | snd_mpu401_uart_input_read(mpu); |
| 98 | } else { |
| 99 | snd_mpu401_uart_clear_rx(mpu); |
| 100 | } |
| 101 | spin_unlock(&mpu->input_lock); |
| 102 | /* ok. for better Tx performance try do some output when input is done */ |
| 103 | if (test_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode) && |
| 104 | test_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode)) { |
| 105 | spin_lock(&mpu->output_lock); |
| 106 | snd_mpu401_uart_output_write(mpu); |
| 107 | spin_unlock(&mpu->output_lock); |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | /** |
| 112 | * snd_mpu401_uart_interrupt - generic MPU401-UART interrupt handler |
| 113 | * @irq: the irq number |
| 114 | * @dev_id: mpu401 instance |
| 115 | * @regs: the reigster |
| 116 | * |
| 117 | * Processes the interrupt for MPU401-UART i/o. |
| 118 | */ |
| 119 | irqreturn_t snd_mpu401_uart_interrupt(int irq, void *dev_id, struct pt_regs *regs) |
| 120 | { |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 121 | struct snd_mpu401 *mpu = dev_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | |
| 123 | if (mpu == NULL) |
| 124 | return IRQ_NONE; |
| 125 | _snd_mpu401_uart_interrupt(mpu); |
| 126 | return IRQ_HANDLED; |
| 127 | } |
| 128 | |
| 129 | /* |
| 130 | * timer callback |
| 131 | * reprogram the timer and call the interrupt job |
| 132 | */ |
| 133 | static void snd_mpu401_uart_timer(unsigned long data) |
| 134 | { |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 135 | struct snd_mpu401 *mpu = (struct snd_mpu401 *)data; |
Takashi Iwai | b32425a | 2005-11-18 18:52:14 +0100 | [diff] [blame] | 136 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | |
Takashi Iwai | b32425a | 2005-11-18 18:52:14 +0100 | [diff] [blame] | 138 | spin_lock_irqsave(&mpu->timer_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | /*mpu->mode |= MPU401_MODE_TIMER;*/ |
| 140 | mpu->timer.expires = 1 + jiffies; |
| 141 | add_timer(&mpu->timer); |
Takashi Iwai | b32425a | 2005-11-18 18:52:14 +0100 | [diff] [blame] | 142 | spin_unlock_irqrestore(&mpu->timer_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | if (mpu->rmidi) |
| 144 | _snd_mpu401_uart_interrupt(mpu); |
| 145 | } |
| 146 | |
| 147 | /* |
| 148 | * initialize the timer callback if not programmed yet |
| 149 | */ |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 150 | 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] | 151 | { |
| 152 | unsigned long flags; |
| 153 | |
| 154 | spin_lock_irqsave (&mpu->timer_lock, flags); |
| 155 | if (mpu->timer_invoked == 0) { |
| 156 | init_timer(&mpu->timer); |
| 157 | mpu->timer.data = (unsigned long)mpu; |
| 158 | mpu->timer.function = snd_mpu401_uart_timer; |
| 159 | mpu->timer.expires = 1 + jiffies; |
| 160 | add_timer(&mpu->timer); |
| 161 | } |
| 162 | mpu->timer_invoked |= input ? MPU401_MODE_INPUT_TIMER : MPU401_MODE_OUTPUT_TIMER; |
| 163 | spin_unlock_irqrestore (&mpu->timer_lock, flags); |
| 164 | } |
| 165 | |
| 166 | /* |
| 167 | * remove the timer callback if still active |
| 168 | */ |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 169 | 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] | 170 | { |
| 171 | unsigned long flags; |
| 172 | |
| 173 | spin_lock_irqsave (&mpu->timer_lock, flags); |
| 174 | if (mpu->timer_invoked) { |
| 175 | mpu->timer_invoked &= input ? ~MPU401_MODE_INPUT_TIMER : ~MPU401_MODE_OUTPUT_TIMER; |
| 176 | if (! mpu->timer_invoked) |
| 177 | del_timer(&mpu->timer); |
| 178 | } |
| 179 | spin_unlock_irqrestore (&mpu->timer_lock, flags); |
| 180 | } |
| 181 | |
| 182 | /* |
| 183 | |
| 184 | */ |
| 185 | |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 186 | static void snd_mpu401_uart_cmd(struct snd_mpu401 * mpu, unsigned char cmd, int ack) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | { |
| 188 | unsigned long flags; |
| 189 | int timeout, ok; |
| 190 | |
| 191 | spin_lock_irqsave(&mpu->input_lock, flags); |
| 192 | if (mpu->hardware != MPU401_HW_TRID4DWAVE) { |
| 193 | mpu->write(mpu, 0x00, MPU401D(mpu)); |
| 194 | /*snd_mpu401_uart_clear_rx(mpu);*/ |
| 195 | } |
| 196 | /* ok. standard MPU-401 initialization */ |
| 197 | if (mpu->hardware != MPU401_HW_SB) { |
| 198 | for (timeout = 1000; timeout > 0 && !snd_mpu401_output_ready(mpu); timeout--) |
| 199 | udelay(10); |
| 200 | #ifdef CONFIG_SND_DEBUG |
| 201 | if (!timeout) |
| 202 | snd_printk("cmd: tx timeout (status = 0x%x)\n", mpu->read(mpu, MPU401C(mpu))); |
| 203 | #endif |
| 204 | } |
| 205 | mpu->write(mpu, cmd, MPU401C(mpu)); |
| 206 | if (ack) { |
| 207 | ok = 0; |
| 208 | timeout = 10000; |
| 209 | while (!ok && timeout-- > 0) { |
| 210 | if (snd_mpu401_input_avail(mpu)) { |
| 211 | if (mpu->read(mpu, MPU401D(mpu)) == MPU401_ACK) |
| 212 | ok = 1; |
| 213 | } |
| 214 | } |
| 215 | if (!ok && mpu->read(mpu, MPU401D(mpu)) == MPU401_ACK) |
| 216 | ok = 1; |
| 217 | } else { |
| 218 | ok = 1; |
| 219 | } |
| 220 | spin_unlock_irqrestore(&mpu->input_lock, flags); |
| 221 | if (! ok) |
| 222 | snd_printk("cmd: 0x%x failed at 0x%lx (status = 0x%x, data = 0x%x)\n", cmd, mpu->port, mpu->read(mpu, MPU401C(mpu)), mpu->read(mpu, MPU401D(mpu))); |
| 223 | // snd_printk("cmd: 0x%x at 0x%lx (status = 0x%x, data = 0x%x)\n", cmd, mpu->port, mpu->read(mpu, MPU401C(mpu)), mpu->read(mpu, MPU401D(mpu))); |
| 224 | } |
| 225 | |
| 226 | /* |
| 227 | * input/output open/close - protected by open_mutex in rawmidi.c |
| 228 | */ |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 229 | static int snd_mpu401_uart_input_open(struct snd_rawmidi_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | { |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 231 | struct snd_mpu401 *mpu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | int err; |
| 233 | |
| 234 | mpu = substream->rmidi->private_data; |
| 235 | if (mpu->open_input && (err = mpu->open_input(mpu)) < 0) |
| 236 | return err; |
| 237 | if (! test_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode)) { |
| 238 | snd_mpu401_uart_cmd(mpu, MPU401_RESET, 1); |
| 239 | snd_mpu401_uart_cmd(mpu, MPU401_ENTER_UART, 1); |
| 240 | } |
| 241 | mpu->substream_input = substream; |
| 242 | set_bit(MPU401_MODE_BIT_INPUT, &mpu->mode); |
| 243 | return 0; |
| 244 | } |
| 245 | |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 246 | static int snd_mpu401_uart_output_open(struct snd_rawmidi_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | { |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 248 | struct snd_mpu401 *mpu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | int err; |
| 250 | |
| 251 | mpu = substream->rmidi->private_data; |
| 252 | if (mpu->open_output && (err = mpu->open_output(mpu)) < 0) |
| 253 | return err; |
| 254 | if (! test_bit(MPU401_MODE_BIT_INPUT, &mpu->mode)) { |
| 255 | snd_mpu401_uart_cmd(mpu, MPU401_RESET, 1); |
| 256 | snd_mpu401_uart_cmd(mpu, MPU401_ENTER_UART, 1); |
| 257 | } |
| 258 | mpu->substream_output = substream; |
| 259 | set_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode); |
| 260 | return 0; |
| 261 | } |
| 262 | |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 263 | static int snd_mpu401_uart_input_close(struct snd_rawmidi_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | { |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 265 | struct snd_mpu401 *mpu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | |
| 267 | mpu = substream->rmidi->private_data; |
| 268 | clear_bit(MPU401_MODE_BIT_INPUT, &mpu->mode); |
| 269 | mpu->substream_input = NULL; |
| 270 | if (! test_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode)) |
| 271 | snd_mpu401_uart_cmd(mpu, MPU401_RESET, 0); |
| 272 | if (mpu->close_input) |
| 273 | mpu->close_input(mpu); |
| 274 | return 0; |
| 275 | } |
| 276 | |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 277 | static int snd_mpu401_uart_output_close(struct snd_rawmidi_substream *substream) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | { |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 279 | struct snd_mpu401 *mpu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | |
| 281 | mpu = substream->rmidi->private_data; |
| 282 | clear_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode); |
| 283 | mpu->substream_output = NULL; |
| 284 | if (! test_bit(MPU401_MODE_BIT_INPUT, &mpu->mode)) |
| 285 | snd_mpu401_uart_cmd(mpu, MPU401_RESET, 0); |
| 286 | if (mpu->close_output) |
| 287 | mpu->close_output(mpu); |
| 288 | return 0; |
| 289 | } |
| 290 | |
| 291 | /* |
| 292 | * trigger input callback |
| 293 | */ |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 294 | static void snd_mpu401_uart_input_trigger(struct snd_rawmidi_substream *substream, int up) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | { |
| 296 | unsigned long flags; |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 297 | struct snd_mpu401 *mpu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | int max = 64; |
| 299 | |
| 300 | mpu = substream->rmidi->private_data; |
| 301 | if (up) { |
| 302 | if (! test_and_set_bit(MPU401_MODE_BIT_INPUT_TRIGGER, &mpu->mode)) { |
| 303 | /* first time - flush FIFO */ |
| 304 | while (max-- > 0) |
| 305 | mpu->read(mpu, MPU401D(mpu)); |
| 306 | if (mpu->irq < 0) |
| 307 | snd_mpu401_uart_add_timer(mpu, 1); |
| 308 | } |
| 309 | |
| 310 | /* read data in advance */ |
| 311 | spin_lock_irqsave(&mpu->input_lock, flags); |
| 312 | snd_mpu401_uart_input_read(mpu); |
| 313 | spin_unlock_irqrestore(&mpu->input_lock, flags); |
| 314 | } else { |
| 315 | if (mpu->irq < 0) |
| 316 | snd_mpu401_uart_remove_timer(mpu, 1); |
| 317 | clear_bit(MPU401_MODE_BIT_INPUT_TRIGGER, &mpu->mode); |
| 318 | } |
| 319 | } |
| 320 | |
| 321 | /* |
| 322 | * transfer input pending data |
| 323 | * call with input_lock spinlock held |
| 324 | */ |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 325 | static void snd_mpu401_uart_input_read(struct snd_mpu401 * mpu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | { |
| 327 | int max = 128; |
| 328 | unsigned char byte; |
| 329 | |
| 330 | while (max-- > 0) { |
| 331 | if (snd_mpu401_input_avail(mpu)) { |
| 332 | byte = mpu->read(mpu, MPU401D(mpu)); |
| 333 | if (test_bit(MPU401_MODE_BIT_INPUT_TRIGGER, &mpu->mode)) |
| 334 | snd_rawmidi_receive(mpu->substream_input, &byte, 1); |
| 335 | } else { |
| 336 | break; /* input not available */ |
| 337 | } |
| 338 | } |
| 339 | } |
| 340 | |
| 341 | /* |
| 342 | * Tx FIFO sizes: |
| 343 | * CS4237B - 16 bytes |
| 344 | * AudioDrive ES1688 - 12 bytes |
| 345 | * S3 SonicVibes - 8 bytes |
| 346 | * SoundBlaster AWE 64 - 2 bytes (ugly hardware) |
| 347 | */ |
| 348 | |
| 349 | /* |
| 350 | * write output pending bytes |
| 351 | * call with output_lock spinlock held |
| 352 | */ |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 353 | static void snd_mpu401_uart_output_write(struct snd_mpu401 * mpu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | { |
| 355 | unsigned char byte; |
| 356 | int max = 256, timeout; |
| 357 | |
| 358 | do { |
| 359 | if (snd_rawmidi_transmit_peek(mpu->substream_output, &byte, 1) == 1) { |
| 360 | for (timeout = 100; timeout > 0; timeout--) { |
| 361 | if (snd_mpu401_output_ready(mpu)) { |
| 362 | mpu->write(mpu, byte, MPU401D(mpu)); |
| 363 | snd_rawmidi_transmit_ack(mpu->substream_output, 1); |
| 364 | break; |
| 365 | } |
| 366 | } |
| 367 | if (timeout == 0) |
| 368 | break; /* Tx FIFO full - try again later */ |
| 369 | } else { |
| 370 | snd_mpu401_uart_remove_timer (mpu, 0); |
| 371 | break; /* no other data - leave the tx loop */ |
| 372 | } |
| 373 | } while (--max > 0); |
| 374 | } |
| 375 | |
| 376 | /* |
| 377 | * output trigger callback |
| 378 | */ |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 379 | static void snd_mpu401_uart_output_trigger(struct snd_rawmidi_substream *substream, int up) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | { |
| 381 | unsigned long flags; |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 382 | struct snd_mpu401 *mpu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | |
| 384 | mpu = substream->rmidi->private_data; |
| 385 | if (up) { |
| 386 | set_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode); |
| 387 | |
| 388 | /* try to add the timer at each output trigger, |
| 389 | * since the output timer might have been removed in |
| 390 | * snd_mpu401_uart_output_write(). |
| 391 | */ |
| 392 | snd_mpu401_uart_add_timer(mpu, 0); |
| 393 | |
| 394 | /* output pending data */ |
| 395 | spin_lock_irqsave(&mpu->output_lock, flags); |
| 396 | snd_mpu401_uart_output_write(mpu); |
| 397 | spin_unlock_irqrestore(&mpu->output_lock, flags); |
| 398 | } else { |
| 399 | snd_mpu401_uart_remove_timer(mpu, 0); |
| 400 | clear_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode); |
| 401 | } |
| 402 | } |
| 403 | |
| 404 | /* |
| 405 | |
| 406 | */ |
| 407 | |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 408 | static struct snd_rawmidi_ops snd_mpu401_uart_output = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | { |
| 410 | .open = snd_mpu401_uart_output_open, |
| 411 | .close = snd_mpu401_uart_output_close, |
| 412 | .trigger = snd_mpu401_uart_output_trigger, |
| 413 | }; |
| 414 | |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 415 | static struct snd_rawmidi_ops snd_mpu401_uart_input = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | { |
| 417 | .open = snd_mpu401_uart_input_open, |
| 418 | .close = snd_mpu401_uart_input_close, |
| 419 | .trigger = snd_mpu401_uart_input_trigger, |
| 420 | }; |
| 421 | |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 422 | static void snd_mpu401_uart_free(struct snd_rawmidi *rmidi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | { |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 424 | struct snd_mpu401 *mpu = rmidi->private_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | if (mpu->irq_flags && mpu->irq >= 0) |
| 426 | free_irq(mpu->irq, (void *) mpu); |
Takashi Iwai | b1d5776 | 2005-10-10 11:56:31 +0200 | [diff] [blame] | 427 | release_and_free_resource(mpu->res); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | kfree(mpu); |
| 429 | } |
| 430 | |
| 431 | /** |
| 432 | * snd_mpu401_uart_new - create an MPU401-UART instance |
| 433 | * @card: the card instance |
| 434 | * @device: the device index, zero-based |
| 435 | * @hardware: the hardware type, MPU401_HW_XXXX |
| 436 | * @port: the base address of MPU401 port |
| 437 | * @integrated: non-zero if the port was already reserved by the chip |
| 438 | * @irq: the irq number, -1 if no interrupt for mpu |
| 439 | * @irq_flags: the irq request flags (SA_XXX), 0 if irq was already reserved. |
| 440 | * @rrawmidi: the pointer to store the new rawmidi instance |
| 441 | * |
| 442 | * Creates a new MPU-401 instance. |
| 443 | * |
| 444 | * Note that the rawmidi instance is returned on the rrawmidi argument, |
| 445 | * not the mpu401 instance itself. To access to the mpu401 instance, |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 446 | * cast from rawmidi->private_data (with struct snd_mpu401 magic-cast). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | * |
| 448 | * Returns zero if successful, or a negative error code. |
| 449 | */ |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 450 | int snd_mpu401_uart_new(struct snd_card *card, int device, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | unsigned short hardware, |
| 452 | unsigned long port, int integrated, |
| 453 | int irq, int irq_flags, |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 454 | struct snd_rawmidi ** rrawmidi) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | { |
Takashi Iwai | e1fad17 | 2005-11-17 14:12:45 +0100 | [diff] [blame] | 456 | struct snd_mpu401 *mpu; |
| 457 | struct snd_rawmidi *rmidi; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | int err; |
| 459 | |
| 460 | if (rrawmidi) |
| 461 | *rrawmidi = NULL; |
| 462 | if ((err = snd_rawmidi_new(card, "MPU-401U", device, 1, 1, &rmidi)) < 0) |
| 463 | return err; |
Takashi Iwai | 561b220 | 2005-09-09 14:22:34 +0200 | [diff] [blame] | 464 | mpu = kzalloc(sizeof(*mpu), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | if (mpu == NULL) { |
Takashi Iwai | 73e77ba | 2005-11-17 17:44:01 +0100 | [diff] [blame] | 466 | snd_printk(KERN_ERR "mpu401_uart: cannot allocate\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | snd_device_free(card, rmidi); |
| 468 | return -ENOMEM; |
| 469 | } |
| 470 | rmidi->private_data = mpu; |
| 471 | rmidi->private_free = snd_mpu401_uart_free; |
| 472 | spin_lock_init(&mpu->input_lock); |
| 473 | spin_lock_init(&mpu->output_lock); |
| 474 | spin_lock_init(&mpu->timer_lock); |
| 475 | mpu->hardware = hardware; |
| 476 | if (!integrated) { |
| 477 | int res_size = hardware == MPU401_HW_PC98II ? 4 : 2; |
| 478 | if ((mpu->res = request_region(port, res_size, "MPU401 UART")) == NULL) { |
| 479 | snd_printk(KERN_ERR "mpu401_uart: unable to grab port 0x%lx size %d\n", port, res_size); |
| 480 | snd_device_free(card, rmidi); |
| 481 | return -EBUSY; |
| 482 | } |
| 483 | } |
| 484 | switch (hardware) { |
| 485 | case MPU401_HW_AUREAL: |
| 486 | mpu->write = mpu401_write_mmio; |
| 487 | mpu->read = mpu401_read_mmio; |
| 488 | break; |
| 489 | default: |
| 490 | mpu->write = mpu401_write_port; |
| 491 | mpu->read = mpu401_read_port; |
| 492 | break; |
| 493 | } |
| 494 | mpu->port = port; |
| 495 | if (hardware == MPU401_HW_PC98II) |
| 496 | mpu->cport = port + 2; |
| 497 | else |
| 498 | mpu->cport = port + 1; |
| 499 | if (irq >= 0 && irq_flags) { |
| 500 | if (request_irq(irq, snd_mpu401_uart_interrupt, irq_flags, "MPU401 UART", (void *) mpu)) { |
| 501 | snd_printk(KERN_ERR "mpu401_uart: unable to grab IRQ %d\n", irq); |
| 502 | snd_device_free(card, rmidi); |
| 503 | return -EBUSY; |
| 504 | } |
| 505 | } |
| 506 | mpu->irq = irq; |
| 507 | mpu->irq_flags = irq_flags; |
| 508 | if (card->shortname[0]) |
| 509 | snprintf(rmidi->name, sizeof(rmidi->name), "%s MIDI", card->shortname); |
| 510 | else |
| 511 | sprintf(rmidi->name, "MPU-401 MIDI %d-%d", card->number, device); |
| 512 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_mpu401_uart_output); |
| 513 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_mpu401_uart_input); |
| 514 | rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT | |
| 515 | SNDRV_RAWMIDI_INFO_INPUT | |
| 516 | SNDRV_RAWMIDI_INFO_DUPLEX; |
| 517 | mpu->rmidi = rmidi; |
| 518 | if (rrawmidi) |
| 519 | *rrawmidi = rmidi; |
| 520 | return 0; |
| 521 | } |
| 522 | |
| 523 | EXPORT_SYMBOL(snd_mpu401_uart_interrupt); |
| 524 | EXPORT_SYMBOL(snd_mpu401_uart_new); |
| 525 | |
| 526 | /* |
| 527 | * INIT part |
| 528 | */ |
| 529 | |
| 530 | static int __init alsa_mpu401_uart_init(void) |
| 531 | { |
| 532 | return 0; |
| 533 | } |
| 534 | |
| 535 | static void __exit alsa_mpu401_uart_exit(void) |
| 536 | { |
| 537 | } |
| 538 | |
| 539 | module_init(alsa_mpu401_uart_init) |
| 540 | module_exit(alsa_mpu401_uart_exit) |