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757e119b MK |
1 | /* |
2 | * Driver for Midiman Portman2x4 parallel port midi interface | |
3 | * | |
4 | * Copyright (c) by Levent Guendogdu <levon@feature-it.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | * | |
20 | * ChangeLog | |
21 | * Jan 24 2007 Matthias Koenig <mkoenig@suse.de> | |
22 | * - cleanup and rewrite | |
23 | * Sep 30 2004 Tobias Gehrig <tobias@gehrig.tk> | |
24 | * - source code cleanup | |
25 | * Sep 03 2004 Tobias Gehrig <tobias@gehrig.tk> | |
26 | * - fixed compilation problem with alsa 1.0.6a (removed MODULE_CLASSES, | |
27 | * MODULE_PARM_SYNTAX and changed MODULE_DEVICES to | |
28 | * MODULE_SUPPORTED_DEVICE) | |
29 | * Mar 24 2004 Tobias Gehrig <tobias@gehrig.tk> | |
30 | * - added 2.6 kernel support | |
31 | * Mar 18 2004 Tobias Gehrig <tobias@gehrig.tk> | |
32 | * - added parport_unregister_driver to the startup routine if the driver fails to detect a portman | |
33 | * - added support for all 4 output ports in portman_putmidi | |
34 | * Mar 17 2004 Tobias Gehrig <tobias@gehrig.tk> | |
35 | * - added checks for opened input device in interrupt handler | |
36 | * Feb 20 2004 Tobias Gehrig <tobias@gehrig.tk> | |
37 | * - ported from alsa 0.5 to 1.0 | |
38 | */ | |
39 | ||
40 | #include <sound/driver.h> | |
41 | #include <linux/init.h> | |
42 | #include <linux/platform_device.h> | |
43 | #include <linux/parport.h> | |
44 | #include <linux/spinlock.h> | |
45 | #include <linux/delay.h> | |
46 | #include <sound/core.h> | |
47 | #include <sound/initval.h> | |
48 | #include <sound/rawmidi.h> | |
49 | #include <sound/control.h> | |
50 | ||
51 | #define CARD_NAME "Portman 2x4" | |
52 | #define DRIVER_NAME "portman" | |
53 | #define PLATFORM_DRIVER "snd_portman2x4" | |
54 | ||
55 | static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; | |
56 | static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; | |
57 | static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; | |
58 | ||
59 | static struct platform_device *platform_devices[SNDRV_CARDS]; | |
60 | static int device_count; | |
61 | ||
62 | module_param_array(index, int, NULL, S_IRUGO); | |
63 | MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard."); | |
64 | module_param_array(id, charp, NULL, S_IRUGO); | |
65 | MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard."); | |
66 | module_param_array(enable, bool, NULL, S_IRUGO); | |
67 | MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard."); | |
68 | ||
69 | MODULE_AUTHOR("Levent Guendogdu, Tobias Gehrig, Matthias Koenig"); | |
70 | MODULE_DESCRIPTION("Midiman Portman2x4"); | |
71 | MODULE_LICENSE("GPL"); | |
72 | MODULE_SUPPORTED_DEVICE("{{Midiman,Portman2x4}}"); | |
73 | ||
74 | /********************************************************************* | |
75 | * Chip specific | |
76 | *********************************************************************/ | |
77 | #define PORTMAN_NUM_INPUT_PORTS 2 | |
78 | #define PORTMAN_NUM_OUTPUT_PORTS 4 | |
79 | ||
80 | struct portman { | |
81 | spinlock_t reg_lock; | |
82 | struct snd_card *card; | |
83 | struct snd_rawmidi *rmidi; | |
84 | struct pardevice *pardev; | |
85 | int pardev_claimed; | |
86 | ||
87 | int open_count; | |
88 | int mode[PORTMAN_NUM_INPUT_PORTS]; | |
89 | struct snd_rawmidi_substream *midi_input[PORTMAN_NUM_INPUT_PORTS]; | |
90 | }; | |
91 | ||
92 | static int portman_free(struct portman *pm) | |
93 | { | |
94 | kfree(pm); | |
95 | return 0; | |
96 | } | |
97 | ||
98 | static int __devinit portman_create(struct snd_card *card, | |
99 | struct pardevice *pardev, | |
100 | struct portman **rchip) | |
101 | { | |
102 | struct portman *pm; | |
103 | ||
104 | *rchip = NULL; | |
105 | ||
106 | pm = kzalloc(sizeof(struct portman), GFP_KERNEL); | |
107 | if (pm == NULL) | |
108 | return -ENOMEM; | |
109 | ||
110 | /* Init chip specific data */ | |
111 | spin_lock_init(&pm->reg_lock); | |
112 | pm->card = card; | |
113 | pm->pardev = pardev; | |
114 | ||
115 | *rchip = pm; | |
116 | ||
117 | return 0; | |
118 | } | |
119 | ||
120 | /********************************************************************* | |
121 | * HW related constants | |
122 | *********************************************************************/ | |
123 | ||
124 | /* Standard PC parallel port status register equates. */ | |
125 | #define PP_STAT_BSY 0x80 /* Busy status. Inverted. */ | |
126 | #define PP_STAT_ACK 0x40 /* Acknowledge. Non-Inverted. */ | |
127 | #define PP_STAT_POUT 0x20 /* Paper Out. Non-Inverted. */ | |
128 | #define PP_STAT_SEL 0x10 /* Select. Non-Inverted. */ | |
129 | #define PP_STAT_ERR 0x08 /* Error. Non-Inverted. */ | |
130 | ||
131 | /* Standard PC parallel port command register equates. */ | |
132 | #define PP_CMD_IEN 0x10 /* IRQ Enable. Non-Inverted. */ | |
133 | #define PP_CMD_SELI 0x08 /* Select Input. Inverted. */ | |
134 | #define PP_CMD_INIT 0x04 /* Init Printer. Non-Inverted. */ | |
135 | #define PP_CMD_FEED 0x02 /* Auto Feed. Inverted. */ | |
136 | #define PP_CMD_STB 0x01 /* Strobe. Inverted. */ | |
137 | ||
138 | /* Parallel Port Command Register as implemented by PCP2x4. */ | |
139 | #define INT_EN PP_CMD_IEN /* Interrupt enable. */ | |
140 | #define STROBE PP_CMD_STB /* Command strobe. */ | |
141 | ||
142 | /* The parallel port command register field (b1..b3) selects the | |
143 | * various "registers" within the PC/P 2x4. These are the internal | |
144 | * address of these "registers" that must be written to the parallel | |
145 | * port command register. | |
146 | */ | |
147 | #define RXDATA0 (0 << 1) /* PCP RxData channel 0. */ | |
148 | #define RXDATA1 (1 << 1) /* PCP RxData channel 1. */ | |
149 | #define GEN_CTL (2 << 1) /* PCP General Control Register. */ | |
150 | #define SYNC_CTL (3 << 1) /* PCP Sync Control Register. */ | |
151 | #define TXDATA0 (4 << 1) /* PCP TxData channel 0. */ | |
152 | #define TXDATA1 (5 << 1) /* PCP TxData channel 1. */ | |
153 | #define TXDATA2 (6 << 1) /* PCP TxData channel 2. */ | |
154 | #define TXDATA3 (7 << 1) /* PCP TxData channel 3. */ | |
155 | ||
156 | /* Parallel Port Status Register as implemented by PCP2x4. */ | |
157 | #define ESTB PP_STAT_POUT /* Echoed strobe. */ | |
158 | #define INT_REQ PP_STAT_ACK /* Input data int request. */ | |
159 | #define BUSY PP_STAT_ERR /* Interface Busy. */ | |
160 | ||
161 | /* Parallel Port Status Register BUSY and SELECT lines are multiplexed | |
162 | * between several functions. Depending on which 2x4 "register" is | |
163 | * currently selected (b1..b3), the BUSY and SELECT lines are | |
164 | * assigned as follows: | |
165 | * | |
166 | * SELECT LINE: A3 A2 A1 | |
167 | * -------- | |
168 | */ | |
169 | #define RXAVAIL PP_STAT_SEL /* Rx Available, channel 0. 0 0 0 */ | |
170 | // RXAVAIL1 PP_STAT_SEL /* Rx Available, channel 1. 0 0 1 */ | |
171 | #define SYNC_STAT PP_STAT_SEL /* Reserved - Sync Status. 0 1 0 */ | |
172 | // /* Reserved. 0 1 1 */ | |
173 | #define TXEMPTY PP_STAT_SEL /* Tx Empty, channel 0. 1 0 0 */ | |
174 | // TXEMPTY1 PP_STAT_SEL /* Tx Empty, channel 1. 1 0 1 */ | |
175 | // TXEMPTY2 PP_STAT_SEL /* Tx Empty, channel 2. 1 1 0 */ | |
176 | // TXEMPTY3 PP_STAT_SEL /* Tx Empty, channel 3. 1 1 1 */ | |
177 | ||
178 | /* BUSY LINE: A3 A2 A1 | |
179 | * -------- | |
180 | */ | |
181 | #define RXDATA PP_STAT_BSY /* Rx Input Data, channel 0. 0 0 0 */ | |
182 | // RXDATA1 PP_STAT_BSY /* Rx Input Data, channel 1. 0 0 1 */ | |
183 | #define SYNC_DATA PP_STAT_BSY /* Reserved - Sync Data. 0 1 0 */ | |
184 | /* Reserved. 0 1 1 */ | |
185 | #define DATA_ECHO PP_STAT_BSY /* Parallel Port Data Echo. 1 0 0 */ | |
186 | #define A0_ECHO PP_STAT_BSY /* Address 0 Echo. 1 0 1 */ | |
187 | #define A1_ECHO PP_STAT_BSY /* Address 1 Echo. 1 1 0 */ | |
188 | #define A2_ECHO PP_STAT_BSY /* Address 2 Echo. 1 1 1 */ | |
189 | ||
190 | #define PORTMAN2X4_MODE_INPUT_TRIGGERED 0x01 | |
191 | ||
192 | /********************************************************************* | |
193 | * Hardware specific functions | |
194 | *********************************************************************/ | |
195 | static inline void portman_write_command(struct portman *pm, u8 value) | |
196 | { | |
197 | parport_write_control(pm->pardev->port, value); | |
198 | } | |
199 | ||
200 | static inline u8 portman_read_command(struct portman *pm) | |
201 | { | |
202 | return parport_read_control(pm->pardev->port); | |
203 | } | |
204 | ||
205 | static inline u8 portman_read_status(struct portman *pm) | |
206 | { | |
207 | return parport_read_status(pm->pardev->port); | |
208 | } | |
209 | ||
210 | static inline u8 portman_read_data(struct portman *pm) | |
211 | { | |
212 | return parport_read_data(pm->pardev->port); | |
213 | } | |
214 | ||
215 | static inline void portman_write_data(struct portman *pm, u8 value) | |
216 | { | |
217 | parport_write_data(pm->pardev->port, value); | |
218 | } | |
219 | ||
220 | static void portman_write_midi(struct portman *pm, | |
221 | int port, u8 mididata) | |
222 | { | |
223 | int command = ((port + 4) << 1); | |
224 | ||
225 | /* Get entering data byte and port number in BL and BH respectively. | |
226 | * Set up Tx Channel address field for use with PP Cmd Register. | |
227 | * Store address field in BH register. | |
228 | * Inputs: AH = Output port number (0..3). | |
229 | * AL = Data byte. | |
230 | * command = TXDATA0 | INT_EN; | |
231 | * Align port num with address field (b1...b3), | |
232 | * set address for TXDatax, Strobe=0 | |
233 | */ | |
234 | command |= INT_EN; | |
235 | ||
236 | /* Disable interrupts so that the process is not interrupted, then | |
237 | * write the address associated with the current Tx channel to the | |
238 | * PP Command Reg. Do not set the Strobe signal yet. | |
239 | */ | |
240 | ||
241 | do { | |
242 | portman_write_command(pm, command); | |
243 | ||
244 | /* While the address lines settle, write parallel output data to | |
245 | * PP Data Reg. This has no effect until Strobe signal is asserted. | |
246 | */ | |
247 | ||
248 | portman_write_data(pm, mididata); | |
249 | ||
250 | /* If PCP channel's TxEmpty is set (TxEmpty is read through the PP | |
251 | * Status Register), then go write data. Else go back and wait. | |
252 | */ | |
253 | } while ((portman_read_status(pm) & TXEMPTY) != TXEMPTY); | |
254 | ||
255 | /* TxEmpty is set. Maintain PC/P destination address and assert | |
256 | * Strobe through the PP Command Reg. This will Strobe data into | |
257 | * the PC/P transmitter and set the PC/P BUSY signal. | |
258 | */ | |
259 | ||
260 | portman_write_command(pm, command | STROBE); | |
261 | ||
262 | /* Wait for strobe line to settle and echo back through hardware. | |
263 | * Once it has echoed back, assume that the address and data lines | |
264 | * have settled! | |
265 | */ | |
266 | ||
267 | while ((portman_read_status(pm) & ESTB) == 0) | |
268 | cpu_relax(); | |
269 | ||
270 | /* Release strobe and immediately re-allow interrupts. */ | |
271 | portman_write_command(pm, command); | |
272 | ||
273 | while ((portman_read_status(pm) & ESTB) == ESTB) | |
274 | cpu_relax(); | |
275 | ||
276 | /* PC/P BUSY is now set. We must wait until BUSY resets itself. | |
277 | * We'll reenable ints while we're waiting. | |
278 | */ | |
279 | ||
280 | while ((portman_read_status(pm) & BUSY) == BUSY) | |
281 | cpu_relax(); | |
282 | ||
283 | /* Data sent. */ | |
284 | } | |
285 | ||
286 | ||
287 | /* | |
288 | * Read MIDI byte from port | |
289 | * Attempt to read input byte from specified hardware input port (0..). | |
290 | * Return -1 if no data | |
291 | */ | |
292 | static int portman_read_midi(struct portman *pm, int port) | |
293 | { | |
294 | unsigned char midi_data = 0; | |
295 | unsigned char cmdout; /* Saved address+IE bit. */ | |
296 | ||
297 | /* Make sure clocking edge is down before starting... */ | |
298 | portman_write_data(pm, 0); /* Make sure edge is down. */ | |
299 | ||
300 | /* Set destination address to PCP. */ | |
301 | cmdout = (port << 1) | INT_EN; /* Address + IE + No Strobe. */ | |
302 | portman_write_command(pm, cmdout); | |
303 | ||
304 | while ((portman_read_status(pm) & ESTB) == ESTB) | |
305 | cpu_relax(); /* Wait for strobe echo. */ | |
306 | ||
307 | /* After the address lines settle, check multiplexed RxAvail signal. | |
308 | * If data is available, read it. | |
309 | */ | |
310 | if ((portman_read_status(pm) & RXAVAIL) == 0) | |
311 | return -1; /* No data. */ | |
312 | ||
313 | /* Set the Strobe signal to enable the Rx clocking circuitry. */ | |
314 | portman_write_command(pm, cmdout | STROBE); /* Write address+IE+Strobe. */ | |
315 | ||
316 | while ((portman_read_status(pm) & ESTB) == 0) | |
317 | cpu_relax(); /* Wait for strobe echo. */ | |
318 | ||
319 | /* The first data bit (msb) is already sitting on the input line. */ | |
320 | midi_data = (portman_read_status(pm) & 128); | |
321 | portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ | |
322 | ||
323 | /* Data bit 6. */ | |
324 | portman_write_data(pm, 0); /* Cause falling edge while data settles. */ | |
325 | midi_data |= (portman_read_status(pm) >> 1) & 64; | |
326 | portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ | |
327 | ||
328 | /* Data bit 5. */ | |
329 | portman_write_data(pm, 0); /* Cause falling edge while data settles. */ | |
330 | midi_data |= (portman_read_status(pm) >> 2) & 32; | |
331 | portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ | |
332 | ||
333 | /* Data bit 4. */ | |
334 | portman_write_data(pm, 0); /* Cause falling edge while data settles. */ | |
335 | midi_data |= (portman_read_status(pm) >> 3) & 16; | |
336 | portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ | |
337 | ||
338 | /* Data bit 3. */ | |
339 | portman_write_data(pm, 0); /* Cause falling edge while data settles. */ | |
340 | midi_data |= (portman_read_status(pm) >> 4) & 8; | |
341 | portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ | |
342 | ||
343 | /* Data bit 2. */ | |
344 | portman_write_data(pm, 0); /* Cause falling edge while data settles. */ | |
345 | midi_data |= (portman_read_status(pm) >> 5) & 4; | |
346 | portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ | |
347 | ||
348 | /* Data bit 1. */ | |
349 | portman_write_data(pm, 0); /* Cause falling edge while data settles. */ | |
350 | midi_data |= (portman_read_status(pm) >> 6) & 2; | |
351 | portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ | |
352 | ||
353 | /* Data bit 0. */ | |
354 | portman_write_data(pm, 0); /* Cause falling edge while data settles. */ | |
355 | midi_data |= (portman_read_status(pm) >> 7) & 1; | |
356 | portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ | |
357 | portman_write_data(pm, 0); /* Return data clock low. */ | |
358 | ||
359 | ||
360 | /* De-assert Strobe and return data. */ | |
361 | portman_write_command(pm, cmdout); /* Output saved address+IE. */ | |
362 | ||
363 | /* Wait for strobe echo. */ | |
364 | while ((portman_read_status(pm) & ESTB) == ESTB) | |
365 | cpu_relax(); | |
366 | ||
367 | return (midi_data & 255); /* Shift back and return value. */ | |
368 | } | |
369 | ||
370 | /* | |
371 | * Checks if any input data on the given channel is available | |
372 | * Checks RxAvail | |
373 | */ | |
374 | static int portman_data_avail(struct portman *pm, int channel) | |
375 | { | |
376 | int command = INT_EN; | |
377 | switch (channel) { | |
378 | case 0: | |
379 | command |= RXDATA0; | |
380 | break; | |
381 | case 1: | |
382 | command |= RXDATA1; | |
383 | break; | |
384 | } | |
385 | /* Write hardware (assumme STROBE=0) */ | |
386 | portman_write_command(pm, command); | |
387 | /* Check multiplexed RxAvail signal */ | |
388 | if ((portman_read_status(pm) & RXAVAIL) == RXAVAIL) | |
389 | return 1; /* Data available */ | |
390 | ||
391 | /* No Data available */ | |
392 | return 0; | |
393 | } | |
394 | ||
395 | ||
396 | /* | |
397 | * Flushes any input | |
398 | */ | |
399 | static void portman_flush_input(struct portman *pm, unsigned char port) | |
400 | { | |
401 | /* Local variable for counting things */ | |
402 | unsigned int i = 0; | |
403 | unsigned char command = 0; | |
404 | ||
405 | switch (port) { | |
406 | case 0: | |
407 | command = RXDATA0; | |
408 | break; | |
409 | case 1: | |
410 | command = RXDATA1; | |
411 | break; | |
412 | default: | |
413 | snd_printk(KERN_WARNING | |
414 | "portman_flush_input() Won't flush port %i\n", | |
415 | port); | |
416 | return; | |
417 | } | |
418 | ||
419 | /* Set address for specified channel in port and allow to settle. */ | |
420 | portman_write_command(pm, command); | |
421 | ||
422 | /* Assert the Strobe and wait for echo back. */ | |
423 | portman_write_command(pm, command | STROBE); | |
424 | ||
425 | /* Wait for ESTB */ | |
426 | while ((portman_read_status(pm) & ESTB) == 0) | |
427 | cpu_relax(); | |
428 | ||
429 | /* Output clock cycles to the Rx circuitry. */ | |
430 | portman_write_data(pm, 0); | |
431 | ||
432 | /* Flush 250 bits... */ | |
433 | for (i = 0; i < 250; i++) { | |
434 | portman_write_data(pm, 1); | |
435 | portman_write_data(pm, 0); | |
436 | } | |
437 | ||
438 | /* Deassert the Strobe signal of the port and wait for it to settle. */ | |
439 | portman_write_command(pm, command | INT_EN); | |
440 | ||
441 | /* Wait for settling */ | |
442 | while ((portman_read_status(pm) & ESTB) == ESTB) | |
443 | cpu_relax(); | |
444 | } | |
445 | ||
446 | static int portman_probe(struct parport *p) | |
447 | { | |
448 | /* Initialize the parallel port data register. Will set Rx clocks | |
449 | * low in case we happen to be addressing the Rx ports at this time. | |
450 | */ | |
451 | /* 1 */ | |
452 | parport_write_data(p, 0); | |
453 | ||
454 | /* Initialize the parallel port command register, thus initializing | |
455 | * hardware handshake lines to midi box: | |
456 | * | |
457 | * Strobe = 0 | |
458 | * Interrupt Enable = 0 | |
459 | */ | |
460 | /* 2 */ | |
461 | parport_write_control(p, 0); | |
462 | ||
463 | /* Check if Portman PC/P 2x4 is out there. */ | |
464 | /* 3 */ | |
465 | parport_write_control(p, RXDATA0); /* Write Strobe=0 to command reg. */ | |
466 | ||
467 | /* Check for ESTB to be clear */ | |
468 | /* 4 */ | |
469 | if ((parport_read_status(p) & ESTB) == ESTB) | |
470 | return 1; /* CODE 1 - Strobe Failure. */ | |
471 | ||
472 | /* Set for RXDATA0 where no damage will be done. */ | |
473 | /* 5 */ | |
474 | parport_write_control(p, RXDATA0 + STROBE); /* Write Strobe=1 to command reg. */ | |
475 | ||
476 | /* 6 */ | |
477 | if ((parport_read_status(p) & ESTB) != ESTB) | |
478 | return 1; /* CODE 1 - Strobe Failure. */ | |
479 | ||
480 | /* 7 */ | |
481 | parport_write_control(p, 0); /* Reset Strobe=0. */ | |
482 | ||
483 | /* Check if Tx circuitry is functioning properly. If initialized | |
484 | * unit TxEmpty is false, send out char and see if if goes true. | |
485 | */ | |
486 | /* 8 */ | |
487 | parport_write_control(p, TXDATA0); /* Tx channel 0, strobe off. */ | |
488 | ||
489 | /* If PCP channel's TxEmpty is set (TxEmpty is read through the PP | |
490 | * Status Register), then go write data. Else go back and wait. | |
491 | */ | |
492 | /* 9 */ | |
493 | if ((parport_read_status(p) & TXEMPTY) == 0) | |
494 | return 2; | |
495 | ||
496 | /* Return OK status. */ | |
497 | return 0; | |
498 | } | |
499 | ||
500 | static int portman_device_init(struct portman *pm) | |
501 | { | |
502 | portman_flush_input(pm, 0); | |
503 | portman_flush_input(pm, 1); | |
504 | ||
505 | return 0; | |
506 | } | |
507 | ||
508 | /********************************************************************* | |
509 | * Rawmidi | |
510 | *********************************************************************/ | |
511 | static int snd_portman_midi_open(struct snd_rawmidi_substream *substream) | |
512 | { | |
513 | return 0; | |
514 | } | |
515 | ||
516 | static int snd_portman_midi_close(struct snd_rawmidi_substream *substream) | |
517 | { | |
518 | return 0; | |
519 | } | |
520 | ||
521 | static void snd_portman_midi_input_trigger(struct snd_rawmidi_substream *substream, | |
522 | int up) | |
523 | { | |
524 | struct portman *pm = substream->rmidi->private_data; | |
525 | unsigned long flags; | |
526 | ||
527 | spin_lock_irqsave(&pm->reg_lock, flags); | |
528 | if (up) | |
529 | pm->mode[substream->number] |= PORTMAN2X4_MODE_INPUT_TRIGGERED; | |
530 | else | |
531 | pm->mode[substream->number] &= ~PORTMAN2X4_MODE_INPUT_TRIGGERED; | |
532 | spin_unlock_irqrestore(&pm->reg_lock, flags); | |
533 | } | |
534 | ||
535 | static void snd_portman_midi_output_trigger(struct snd_rawmidi_substream *substream, | |
536 | int up) | |
537 | { | |
538 | struct portman *pm = substream->rmidi->private_data; | |
539 | unsigned long flags; | |
540 | unsigned char byte; | |
541 | ||
542 | spin_lock_irqsave(&pm->reg_lock, flags); | |
543 | if (up) { | |
544 | while ((snd_rawmidi_transmit(substream, &byte, 1) == 1)) | |
545 | portman_write_midi(pm, substream->number, byte); | |
546 | } | |
547 | spin_unlock_irqrestore(&pm->reg_lock, flags); | |
548 | } | |
549 | ||
550 | static struct snd_rawmidi_ops snd_portman_midi_output = { | |
551 | .open = snd_portman_midi_open, | |
552 | .close = snd_portman_midi_close, | |
553 | .trigger = snd_portman_midi_output_trigger, | |
554 | }; | |
555 | ||
556 | static struct snd_rawmidi_ops snd_portman_midi_input = { | |
557 | .open = snd_portman_midi_open, | |
558 | .close = snd_portman_midi_close, | |
559 | .trigger = snd_portman_midi_input_trigger, | |
560 | }; | |
561 | ||
562 | /* Create and initialize the rawmidi component */ | |
563 | static int __devinit snd_portman_rawmidi_create(struct snd_card *card) | |
564 | { | |
565 | struct portman *pm = card->private_data; | |
566 | struct snd_rawmidi *rmidi; | |
567 | struct snd_rawmidi_substream *substream; | |
568 | int err; | |
569 | ||
570 | err = snd_rawmidi_new(card, CARD_NAME, 0, | |
571 | PORTMAN_NUM_OUTPUT_PORTS, | |
572 | PORTMAN_NUM_INPUT_PORTS, | |
573 | &rmidi); | |
574 | if (err < 0) | |
575 | return err; | |
576 | ||
577 | rmidi->private_data = pm; | |
578 | strcpy(rmidi->name, CARD_NAME); | |
579 | rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT | | |
580 | SNDRV_RAWMIDI_INFO_INPUT | | |
581 | SNDRV_RAWMIDI_INFO_DUPLEX; | |
582 | ||
583 | pm->rmidi = rmidi; | |
584 | ||
585 | /* register rawmidi ops */ | |
586 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, | |
587 | &snd_portman_midi_output); | |
588 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, | |
589 | &snd_portman_midi_input); | |
590 | ||
591 | /* name substreams */ | |
592 | /* output */ | |
593 | list_for_each_entry(substream, | |
594 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams, | |
595 | list) { | |
596 | sprintf(substream->name, | |
597 | "Portman2x4 %d", substream->number+1); | |
598 | } | |
599 | /* input */ | |
600 | list_for_each_entry(substream, | |
601 | &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams, | |
602 | list) { | |
603 | pm->midi_input[substream->number] = substream; | |
604 | sprintf(substream->name, | |
605 | "Portman2x4 %d", substream->number+1); | |
606 | } | |
607 | ||
608 | return err; | |
609 | } | |
610 | ||
611 | /********************************************************************* | |
612 | * parport stuff | |
613 | *********************************************************************/ | |
614 | static void snd_portman_interrupt(int irq, void *userdata) | |
615 | { | |
616 | unsigned char midivalue = 0; | |
617 | struct portman *pm = ((struct snd_card*)userdata)->private_data; | |
618 | ||
619 | spin_lock(&pm->reg_lock); | |
620 | ||
621 | /* While any input data is waiting */ | |
622 | while ((portman_read_status(pm) & INT_REQ) == INT_REQ) { | |
623 | /* If data available on channel 0, | |
624 | read it and stuff it into the queue. */ | |
625 | if (portman_data_avail(pm, 0)) { | |
626 | /* Read Midi */ | |
627 | midivalue = portman_read_midi(pm, 0); | |
628 | /* put midi into queue... */ | |
629 | if (pm->mode[0] & PORTMAN2X4_MODE_INPUT_TRIGGERED) | |
630 | snd_rawmidi_receive(pm->midi_input[0], | |
631 | &midivalue, 1); | |
632 | ||
633 | } | |
634 | /* If data available on channel 1, | |
635 | read it and stuff it into the queue. */ | |
636 | if (portman_data_avail(pm, 1)) { | |
637 | /* Read Midi */ | |
638 | midivalue = portman_read_midi(pm, 1); | |
639 | /* put midi into queue... */ | |
640 | if (pm->mode[1] & PORTMAN2X4_MODE_INPUT_TRIGGERED) | |
641 | snd_rawmidi_receive(pm->midi_input[1], | |
642 | &midivalue, 1); | |
643 | } | |
644 | ||
645 | } | |
646 | ||
647 | spin_unlock(&pm->reg_lock); | |
648 | } | |
649 | ||
650 | static int __devinit snd_portman_probe_port(struct parport *p) | |
651 | { | |
652 | struct pardevice *pardev; | |
653 | int res; | |
654 | ||
655 | pardev = parport_register_device(p, DRIVER_NAME, | |
656 | NULL, NULL, NULL, | |
657 | 0, NULL); | |
658 | if (!pardev) | |
659 | return -EIO; | |
660 | ||
661 | if (parport_claim(pardev)) { | |
662 | parport_unregister_device(pardev); | |
663 | return -EIO; | |
664 | } | |
665 | ||
666 | res = portman_probe(p); | |
667 | ||
668 | parport_release(pardev); | |
669 | parport_unregister_device(pardev); | |
670 | ||
671 | return res; | |
672 | } | |
673 | ||
674 | static void __devinit snd_portman_attach(struct parport *p) | |
675 | { | |
676 | struct platform_device *device; | |
677 | ||
678 | device = platform_device_alloc(PLATFORM_DRIVER, device_count); | |
679 | if (!device) | |
680 | return; | |
681 | ||
682 | /* Temporary assignment to forward the parport */ | |
683 | platform_set_drvdata(device, p); | |
684 | ||
685 | if (platform_device_register(device) < 0) { | |
686 | platform_device_put(device); | |
687 | return; | |
688 | } | |
689 | ||
690 | /* Since we dont get the return value of probe | |
691 | * We need to check if device probing succeeded or not */ | |
692 | if (!platform_get_drvdata(device)) { | |
693 | platform_device_unregister(device); | |
694 | return; | |
695 | } | |
696 | ||
697 | /* register device in global table */ | |
698 | platform_devices[device_count] = device; | |
699 | device_count++; | |
700 | } | |
701 | ||
702 | static void snd_portman_detach(struct parport *p) | |
703 | { | |
704 | /* nothing to do here */ | |
705 | } | |
706 | ||
707 | static struct parport_driver portman_parport_driver = { | |
708 | .name = "portman2x4", | |
709 | .attach = snd_portman_attach, | |
710 | .detach = snd_portman_detach | |
711 | }; | |
712 | ||
713 | /********************************************************************* | |
714 | * platform stuff | |
715 | *********************************************************************/ | |
716 | static void snd_portman_card_private_free(struct snd_card *card) | |
717 | { | |
718 | struct portman *pm = card->private_data; | |
719 | struct pardevice *pardev = pm->pardev; | |
720 | ||
721 | if (pardev) { | |
722 | if (pm->pardev_claimed) | |
723 | parport_release(pardev); | |
724 | parport_unregister_device(pardev); | |
725 | } | |
726 | ||
727 | portman_free(pm); | |
728 | } | |
729 | ||
730 | static int __devinit snd_portman_probe(struct platform_device *pdev) | |
731 | { | |
732 | struct pardevice *pardev; | |
733 | struct parport *p; | |
734 | int dev = pdev->id; | |
735 | struct snd_card *card = NULL; | |
736 | struct portman *pm = NULL; | |
737 | int err; | |
738 | ||
739 | p = platform_get_drvdata(pdev); | |
740 | platform_set_drvdata(pdev, NULL); | |
741 | ||
742 | if (dev >= SNDRV_CARDS) | |
743 | return -ENODEV; | |
744 | if (!enable[dev]) | |
745 | return -ENOENT; | |
746 | ||
747 | if ((err = snd_portman_probe_port(p)) < 0) | |
748 | return err; | |
749 | ||
750 | card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0); | |
751 | if (card == NULL) { | |
752 | snd_printd("Cannot create card\n"); | |
753 | return -ENOMEM; | |
754 | } | |
755 | strcpy(card->driver, DRIVER_NAME); | |
756 | strcpy(card->shortname, CARD_NAME); | |
757 | sprintf(card->longname, "%s at 0x%lx, irq %i", | |
758 | card->shortname, p->base, p->irq); | |
759 | ||
760 | pardev = parport_register_device(p, /* port */ | |
761 | DRIVER_NAME, /* name */ | |
762 | NULL, /* preempt */ | |
763 | NULL, /* wakeup */ | |
764 | snd_portman_interrupt, /* ISR */ | |
765 | PARPORT_DEV_EXCL, /* flags */ | |
766 | (void *)card); /* private */ | |
767 | if (pardev == NULL) { | |
768 | snd_printd("Cannot register pardevice\n"); | |
769 | err = -EIO; | |
770 | goto __err; | |
771 | } | |
772 | ||
773 | if ((err = portman_create(card, pardev, &pm)) < 0) { | |
774 | snd_printd("Cannot create main component\n"); | |
775 | parport_unregister_device(pardev); | |
776 | goto __err; | |
777 | } | |
778 | card->private_data = pm; | |
779 | card->private_free = snd_portman_card_private_free; | |
780 | ||
781 | if ((err = snd_portman_rawmidi_create(card)) < 0) { | |
782 | snd_printd("Creating Rawmidi component failed\n"); | |
783 | goto __err; | |
784 | } | |
785 | ||
786 | /* claim parport */ | |
787 | if (parport_claim(pardev)) { | |
788 | snd_printd("Cannot claim parport 0x%lx\n", pardev->port->base); | |
789 | err = -EIO; | |
790 | goto __err; | |
791 | } | |
792 | pm->pardev_claimed = 1; | |
793 | ||
794 | /* init device */ | |
795 | if ((err = portman_device_init(pm)) < 0) | |
796 | goto __err; | |
797 | ||
798 | platform_set_drvdata(pdev, card); | |
799 | ||
800 | /* At this point card will be usable */ | |
801 | if ((err = snd_card_register(card)) < 0) { | |
802 | snd_printd("Cannot register card\n"); | |
803 | goto __err; | |
804 | } | |
805 | ||
806 | snd_printk(KERN_INFO "Portman 2x4 on 0x%lx\n", p->base); | |
807 | return 0; | |
808 | ||
809 | __err: | |
810 | snd_card_free(card); | |
811 | return err; | |
812 | } | |
813 | ||
788c6043 | 814 | static int __devexit snd_portman_remove(struct platform_device *pdev) |
757e119b MK |
815 | { |
816 | struct snd_card *card = platform_get_drvdata(pdev); | |
817 | ||
818 | if (card) | |
819 | snd_card_free(card); | |
820 | ||
821 | return 0; | |
822 | } | |
823 | ||
824 | ||
825 | static struct platform_driver snd_portman_driver = { | |
826 | .probe = snd_portman_probe, | |
788c6043 | 827 | .remove = __dev_exit_p(snd_portman_remove), |
757e119b MK |
828 | .driver = { |
829 | .name = PLATFORM_DRIVER | |
830 | } | |
831 | }; | |
832 | ||
833 | /********************************************************************* | |
834 | * module init stuff | |
835 | *********************************************************************/ | |
788c6043 | 836 | static void __init_or_module snd_portman_unregister_all(void) |
757e119b MK |
837 | { |
838 | int i; | |
839 | ||
840 | for (i = 0; i < SNDRV_CARDS; ++i) { | |
841 | if (platform_devices[i]) { | |
842 | platform_device_unregister(platform_devices[i]); | |
843 | platform_devices[i] = NULL; | |
844 | } | |
845 | } | |
846 | platform_driver_unregister(&snd_portman_driver); | |
847 | parport_unregister_driver(&portman_parport_driver); | |
848 | } | |
849 | ||
850 | static int __init snd_portman_module_init(void) | |
851 | { | |
852 | int err; | |
853 | ||
854 | if ((err = platform_driver_register(&snd_portman_driver)) < 0) | |
855 | return err; | |
856 | ||
857 | if (parport_register_driver(&portman_parport_driver) != 0) { | |
858 | platform_driver_unregister(&snd_portman_driver); | |
859 | return -EIO; | |
860 | } | |
861 | ||
862 | if (device_count == 0) { | |
863 | snd_portman_unregister_all(); | |
864 | return -ENODEV; | |
865 | } | |
866 | ||
867 | return 0; | |
868 | } | |
869 | ||
870 | static void __exit snd_portman_module_exit(void) | |
871 | { | |
872 | snd_portman_unregister_all(); | |
873 | } | |
874 | ||
875 | module_init(snd_portman_module_init); | |
876 | module_exit(snd_portman_module_exit); |