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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * serial.c | |
c1017a4c | 4 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz>, |
1da177e4 LT |
5 | * Isaku Yamahata <yamahata@private.email.ne.jp>, |
6 | * George Hansper <ghansper@apana.org.au>, | |
7 | * Hannu Savolainen | |
8 | * | |
9 | * This code is based on the code from ALSA 0.5.9, but heavily rewritten. | |
10 | * | |
1da177e4 LT |
11 | * Sat Mar 31 17:27:57 PST 2001 tim.mann@compaq.com |
12 | * Added support for the Midiator MS-124T and for the MS-124W in | |
13 | * Single Addressed (S/A) or Multiple Burst (M/B) mode, with | |
14 | * power derived either parasitically from the serial port or | |
15 | * from a separate power supply. | |
16 | * | |
17 | * More documentation can be found in serial-u16550.txt. | |
18 | */ | |
19 | ||
1da177e4 LT |
20 | #include <linux/init.h> |
21 | #include <linux/interrupt.h> | |
9caf6b59 TI |
22 | #include <linux/err.h> |
23 | #include <linux/platform_device.h> | |
1da177e4 LT |
24 | #include <linux/slab.h> |
25 | #include <linux/ioport.h> | |
65a77217 | 26 | #include <linux/module.h> |
6cbbfe1c | 27 | #include <linux/io.h> |
1da177e4 LT |
28 | #include <sound/core.h> |
29 | #include <sound/rawmidi.h> | |
30 | #include <sound/initval.h> | |
31 | ||
32 | #include <linux/serial_reg.h> | |
f11b7992 | 33 | #include <linux/jiffies.h> |
1da177e4 | 34 | |
1da177e4 LT |
35 | MODULE_DESCRIPTION("MIDI serial u16550"); |
36 | MODULE_LICENSE("GPL"); | |
1da177e4 LT |
37 | |
38 | #define SNDRV_SERIAL_SOUNDCANVAS 0 /* Roland Soundcanvas; F5 NN selects part */ | |
39 | #define SNDRV_SERIAL_MS124T 1 /* Midiator MS-124T */ | |
40 | #define SNDRV_SERIAL_MS124W_SA 2 /* Midiator MS-124W in S/A mode */ | |
41 | #define SNDRV_SERIAL_MS124W_MB 3 /* Midiator MS-124W in M/B mode */ | |
42 | #define SNDRV_SERIAL_GENERIC 4 /* Generic Interface */ | |
43 | #define SNDRV_SERIAL_MAX_ADAPTOR SNDRV_SERIAL_GENERIC | |
6c845488 | 44 | static const char * const adaptor_names[] = { |
1da177e4 LT |
45 | "Soundcanvas", |
46 | "MS-124T", | |
47 | "MS-124W S/A", | |
48 | "MS-124W M/B", | |
49 | "Generic" | |
50 | }; | |
51 | ||
52 | #define SNDRV_SERIAL_NORMALBUFF 0 /* Normal blocking buffer operation */ | |
53 | #define SNDRV_SERIAL_DROPBUFF 1 /* Non-blocking discard operation */ | |
54 | ||
55 | static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ | |
56 | static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ | |
a67ff6a5 | 57 | static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE; /* Enable this card */ |
1da177e4 LT |
58 | static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* 0x3f8,0x2f8,0x3e8,0x2e8 */ |
59 | static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* 3,4,5,7,9,10,11,14,15 */ | |
60 | static int speed[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 38400}; /* 9600,19200,38400,57600,115200 */ | |
61 | static int base[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 115200}; /* baud base */ | |
62 | static int outs[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1}; /* 1 to 16 */ | |
63 | static int ins[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1}; /* 1 to 16 */ | |
64 | static int adaptor[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = SNDRV_SERIAL_SOUNDCANVAS}; | |
a67ff6a5 | 65 | static bool droponfull[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS -1)] = SNDRV_SERIAL_NORMALBUFF }; |
1da177e4 LT |
66 | |
67 | module_param_array(index, int, NULL, 0444); | |
68 | MODULE_PARM_DESC(index, "Index value for Serial MIDI."); | |
69 | module_param_array(id, charp, NULL, 0444); | |
70 | MODULE_PARM_DESC(id, "ID string for Serial MIDI."); | |
71 | module_param_array(enable, bool, NULL, 0444); | |
72 | MODULE_PARM_DESC(enable, "Enable UART16550A chip."); | |
b11ce420 | 73 | module_param_hw_array(port, long, ioport, NULL, 0444); |
1da177e4 | 74 | MODULE_PARM_DESC(port, "Port # for UART16550A chip."); |
b11ce420 | 75 | module_param_hw_array(irq, int, irq, NULL, 0444); |
1da177e4 LT |
76 | MODULE_PARM_DESC(irq, "IRQ # for UART16550A chip."); |
77 | module_param_array(speed, int, NULL, 0444); | |
78 | MODULE_PARM_DESC(speed, "Speed in bauds."); | |
79 | module_param_array(base, int, NULL, 0444); | |
80 | MODULE_PARM_DESC(base, "Base for divisor in bauds."); | |
81 | module_param_array(outs, int, NULL, 0444); | |
82 | MODULE_PARM_DESC(outs, "Number of MIDI outputs."); | |
83 | module_param_array(ins, int, NULL, 0444); | |
84 | MODULE_PARM_DESC(ins, "Number of MIDI inputs."); | |
85 | module_param_array(droponfull, bool, NULL, 0444); | |
86 | MODULE_PARM_DESC(droponfull, "Flag to enable drop-on-full buffer mode"); | |
87 | ||
88 | module_param_array(adaptor, int, NULL, 0444); | |
89 | MODULE_PARM_DESC(adaptor, "Type of adaptor."); | |
90 | ||
91 | /*#define SNDRV_SERIAL_MS124W_MB_NOCOMBO 1*/ /* Address outs as 0-3 instead of bitmap */ | |
92 | ||
93 | #define SNDRV_SERIAL_MAX_OUTS 16 /* max 64, min 16 */ | |
94 | #define SNDRV_SERIAL_MAX_INS 16 /* max 64, min 16 */ | |
95 | ||
96 | #define TX_BUFF_SIZE (1<<15) /* Must be 2^n */ | |
97 | #define TX_BUFF_MASK (TX_BUFF_SIZE - 1) | |
98 | ||
99 | #define SERIAL_MODE_NOT_OPENED (0) | |
100 | #define SERIAL_MODE_INPUT_OPEN (1 << 0) | |
101 | #define SERIAL_MODE_OUTPUT_OPEN (1 << 1) | |
102 | #define SERIAL_MODE_INPUT_TRIGGERED (1 << 2) | |
103 | #define SERIAL_MODE_OUTPUT_TRIGGERED (1 << 3) | |
104 | ||
0b830bac | 105 | struct snd_uart16550 { |
4a4d2cfd TI |
106 | struct snd_card *card; |
107 | struct snd_rawmidi *rmidi; | |
108 | struct snd_rawmidi_substream *midi_output[SNDRV_SERIAL_MAX_OUTS]; | |
109 | struct snd_rawmidi_substream *midi_input[SNDRV_SERIAL_MAX_INS]; | |
1da177e4 | 110 | |
0b830bac | 111 | int filemode; /* open status of file */ |
1da177e4 LT |
112 | |
113 | spinlock_t open_lock; | |
114 | ||
115 | int irq; | |
116 | ||
117 | unsigned long base; | |
1da177e4 LT |
118 | |
119 | unsigned int speed; | |
120 | unsigned int speed_base; | |
121 | unsigned char divisor; | |
122 | ||
123 | unsigned char old_divisor_lsb; | |
124 | unsigned char old_divisor_msb; | |
125 | unsigned char old_line_ctrl_reg; | |
126 | ||
0b830bac TI |
127 | /* parameter for using of write loop */ |
128 | short int fifo_limit; /* used in uart16550 */ | |
129 | short int fifo_count; /* used in uart16550 */ | |
1da177e4 | 130 | |
0b830bac | 131 | /* type of adaptor */ |
1da177e4 LT |
132 | int adaptor; |
133 | ||
0b830bac | 134 | /* inputs */ |
1da177e4 LT |
135 | int prev_in; |
136 | unsigned char rstatus; | |
137 | ||
0b830bac | 138 | /* outputs */ |
1da177e4 LT |
139 | int prev_out; |
140 | unsigned char prev_status[SNDRV_SERIAL_MAX_OUTS]; | |
141 | ||
0b830bac | 142 | /* write buffer and its writing/reading position */ |
1da177e4 LT |
143 | unsigned char tx_buff[TX_BUFF_SIZE]; |
144 | int buff_in_count; | |
145 | int buff_in; | |
146 | int buff_out; | |
147 | int drop_on_full; | |
148 | ||
0b830bac | 149 | /* wait timer */ |
1da177e4 LT |
150 | unsigned int timer_running:1; |
151 | struct timer_list buffer_timer; | |
152 | ||
0b830bac | 153 | }; |
1da177e4 | 154 | |
f7a9275d CL |
155 | static struct platform_device *devices[SNDRV_CARDS]; |
156 | ||
0b830bac | 157 | static inline void snd_uart16550_add_timer(struct snd_uart16550 *uart) |
1da177e4 | 158 | { |
0b830bac | 159 | if (!uart->timer_running) { |
1da177e4 | 160 | /* timer 38600bps * 10bit * 16byte */ |
d80d05fc | 161 | mod_timer(&uart->buffer_timer, jiffies + (HZ + 255) / 256); |
1da177e4 | 162 | uart->timer_running = 1; |
1da177e4 LT |
163 | } |
164 | } | |
165 | ||
0b830bac | 166 | static inline void snd_uart16550_del_timer(struct snd_uart16550 *uart) |
1da177e4 LT |
167 | { |
168 | if (uart->timer_running) { | |
169 | del_timer(&uart->buffer_timer); | |
170 | uart->timer_running = 0; | |
171 | } | |
172 | } | |
173 | ||
174 | /* This macro is only used in snd_uart16550_io_loop */ | |
0b830bac | 175 | static inline void snd_uart16550_buffer_output(struct snd_uart16550 *uart) |
1da177e4 LT |
176 | { |
177 | unsigned short buff_out = uart->buff_out; | |
0b830bac | 178 | if (uart->buff_in_count > 0) { |
1da177e4 LT |
179 | outb(uart->tx_buff[buff_out], uart->base + UART_TX); |
180 | uart->fifo_count++; | |
181 | buff_out++; | |
182 | buff_out &= TX_BUFF_MASK; | |
183 | uart->buff_out = buff_out; | |
184 | uart->buff_in_count--; | |
185 | } | |
186 | } | |
187 | ||
188 | /* This loop should be called with interrupts disabled | |
189 | * We don't want to interrupt this, | |
190 | * as we're already handling an interrupt | |
191 | */ | |
0b830bac | 192 | static void snd_uart16550_io_loop(struct snd_uart16550 * uart) |
1da177e4 LT |
193 | { |
194 | unsigned char c, status; | |
195 | int substream; | |
196 | ||
197 | /* recall previous stream */ | |
198 | substream = uart->prev_in; | |
199 | ||
200 | /* Read Loop */ | |
201 | while ((status = inb(uart->base + UART_LSR)) & UART_LSR_DR) { | |
202 | /* while receive data ready */ | |
203 | c = inb(uart->base + UART_RX); | |
204 | ||
205 | /* keep track of last status byte */ | |
0b830bac | 206 | if (c & 0x80) |
1da177e4 | 207 | uart->rstatus = c; |
1da177e4 LT |
208 | |
209 | /* handle stream switch */ | |
210 | if (uart->adaptor == SNDRV_SERIAL_GENERIC) { | |
211 | if (uart->rstatus == 0xf5) { | |
212 | if (c <= SNDRV_SERIAL_MAX_INS && c > 0) | |
213 | substream = c - 1; | |
214 | if (c != 0xf5) | |
0b830bac TI |
215 | /* prevent future bytes from being |
216 | interpreted as streams */ | |
217 | uart->rstatus = 0; | |
218 | } else if ((uart->filemode & SERIAL_MODE_INPUT_OPEN) | |
219 | && uart->midi_input[substream]) | |
220 | snd_rawmidi_receive(uart->midi_input[substream], | |
221 | &c, 1); | |
222 | } else if ((uart->filemode & SERIAL_MODE_INPUT_OPEN) && | |
223 | uart->midi_input[substream]) | |
1da177e4 | 224 | snd_rawmidi_receive(uart->midi_input[substream], &c, 1); |
1da177e4 LT |
225 | |
226 | if (status & UART_LSR_OE) | |
45203832 TI |
227 | snd_printk(KERN_WARNING |
228 | "%s: Overrun on device at 0x%lx\n", | |
1da177e4 LT |
229 | uart->rmidi->name, uart->base); |
230 | } | |
231 | ||
232 | /* remember the last stream */ | |
233 | uart->prev_in = substream; | |
234 | ||
235 | /* no need of check SERIAL_MODE_OUTPUT_OPEN because if not, | |
236 | buffer is never filled. */ | |
237 | /* Check write status */ | |
0b830bac | 238 | if (status & UART_LSR_THRE) |
1da177e4 | 239 | uart->fifo_count = 0; |
1da177e4 LT |
240 | if (uart->adaptor == SNDRV_SERIAL_MS124W_SA |
241 | || uart->adaptor == SNDRV_SERIAL_GENERIC) { | |
242 | /* Can't use FIFO, must send only when CTS is true */ | |
243 | status = inb(uart->base + UART_MSR); | |
0b830bac TI |
244 | while (uart->fifo_count == 0 && (status & UART_MSR_CTS) && |
245 | uart->buff_in_count > 0) { | |
1da177e4 | 246 | snd_uart16550_buffer_output(uart); |
0b830bac | 247 | status = inb(uart->base + UART_MSR); |
1da177e4 LT |
248 | } |
249 | } else { | |
250 | /* Write loop */ | |
0b830bac | 251 | while (uart->fifo_count < uart->fifo_limit /* Can we write ? */ |
1da177e4 LT |
252 | && uart->buff_in_count > 0) /* Do we want to? */ |
253 | snd_uart16550_buffer_output(uart); | |
254 | } | |
255 | if (uart->irq < 0 && uart->buff_in_count > 0) | |
256 | snd_uart16550_add_timer(uart); | |
257 | } | |
258 | ||
259 | /* NOTES ON SERVICING INTERUPTS | |
260 | * --------------------------- | |
261 | * After receiving a interrupt, it is important to indicate to the UART that | |
262 | * this has been done. | |
263 | * For a Rx interrupt, this is done by reading the received byte. | |
264 | * For a Tx interrupt this is done by either: | |
265 | * a) Writing a byte | |
266 | * b) Reading the IIR | |
267 | * It is particularly important to read the IIR if a Tx interrupt is received | |
268 | * when there is no data in tx_buff[], as in this case there no other | |
269 | * indication that the interrupt has been serviced, and it remains outstanding | |
270 | * indefinitely. This has the curious side effect that and no further interrupts | |
271 | * will be generated from this device AT ALL!!. | |
272 | * It is also desirable to clear outstanding interrupts when the device is | |
273 | * opened/closed. | |
274 | * | |
275 | * | |
276 | * Note that some devices need OUT2 to be set before they will generate | |
277 | * interrupts at all. (Possibly tied to an internal pull-up on CTS?) | |
278 | */ | |
7d12e780 | 279 | static irqreturn_t snd_uart16550_interrupt(int irq, void *dev_id) |
1da177e4 | 280 | { |
0b830bac | 281 | struct snd_uart16550 *uart; |
1da177e4 | 282 | |
0b830bac | 283 | uart = dev_id; |
1da177e4 LT |
284 | spin_lock(&uart->open_lock); |
285 | if (uart->filemode == SERIAL_MODE_NOT_OPENED) { | |
286 | spin_unlock(&uart->open_lock); | |
287 | return IRQ_NONE; | |
288 | } | |
0b830bac TI |
289 | /* indicate to the UART that the interrupt has been serviced */ |
290 | inb(uart->base + UART_IIR); | |
1da177e4 LT |
291 | snd_uart16550_io_loop(uart); |
292 | spin_unlock(&uart->open_lock); | |
293 | return IRQ_HANDLED; | |
294 | } | |
295 | ||
296 | /* When the polling mode, this function calls snd_uart16550_io_loop. */ | |
bc47ba90 | 297 | static void snd_uart16550_buffer_timer(struct timer_list *t) |
1da177e4 LT |
298 | { |
299 | unsigned long flags; | |
0b830bac | 300 | struct snd_uart16550 *uart; |
1da177e4 | 301 | |
bc47ba90 | 302 | uart = from_timer(uart, t, buffer_timer); |
1da177e4 LT |
303 | spin_lock_irqsave(&uart->open_lock, flags); |
304 | snd_uart16550_del_timer(uart); | |
305 | snd_uart16550_io_loop(uart); | |
306 | spin_unlock_irqrestore(&uart->open_lock, flags); | |
307 | } | |
308 | ||
309 | /* | |
310 | * this method probes, if an uart sits on given port | |
311 | * return 0 if found | |
312 | * return negative error if not found | |
313 | */ | |
fbbb01a1 | 314 | static int snd_uart16550_detect(struct snd_uart16550 *uart) |
1da177e4 LT |
315 | { |
316 | unsigned long io_base = uart->base; | |
317 | int ok; | |
318 | unsigned char c; | |
319 | ||
320 | /* Do some vague tests for the presence of the uart */ | |
321 | if (io_base == 0 || io_base == SNDRV_AUTO_PORT) { | |
322 | return -ENODEV; /* Not configured */ | |
323 | } | |
324 | ||
60d03de8 | 325 | if (!devm_request_region(uart->card->dev, io_base, 8, "Serial MIDI")) { |
1da177e4 LT |
326 | snd_printk(KERN_ERR "u16550: can't grab port 0x%lx\n", io_base); |
327 | return -EBUSY; | |
328 | } | |
329 | ||
0b830bac TI |
330 | /* uart detected unless one of the following tests should fail */ |
331 | ok = 1; | |
1da177e4 LT |
332 | /* 8 data-bits, 1 stop-bit, parity off, DLAB = 0 */ |
333 | outb(UART_LCR_WLEN8, io_base + UART_LCR); /* Line Control Register */ | |
334 | c = inb(io_base + UART_IER); | |
335 | /* The top four bits of the IER should always == 0 */ | |
336 | if ((c & 0xf0) != 0) | |
337 | ok = 0; /* failed */ | |
338 | ||
339 | outb(0xaa, io_base + UART_SCR); | |
340 | /* Write arbitrary data into the scratch reg */ | |
341 | c = inb(io_base + UART_SCR); | |
342 | /* If it comes back, it's OK */ | |
343 | if (c != 0xaa) | |
344 | ok = 0; /* failed */ | |
345 | ||
346 | outb(0x55, io_base + UART_SCR); | |
347 | /* Write arbitrary data into the scratch reg */ | |
348 | c = inb(io_base + UART_SCR); | |
349 | /* If it comes back, it's OK */ | |
350 | if (c != 0x55) | |
351 | ok = 0; /* failed */ | |
352 | ||
353 | return ok; | |
354 | } | |
355 | ||
0b830bac | 356 | static void snd_uart16550_do_open(struct snd_uart16550 * uart) |
1da177e4 LT |
357 | { |
358 | char byte; | |
359 | ||
360 | /* Initialize basic variables */ | |
361 | uart->buff_in_count = 0; | |
362 | uart->buff_in = 0; | |
363 | uart->buff_out = 0; | |
364 | uart->fifo_limit = 1; | |
365 | uart->fifo_count = 0; | |
366 | uart->timer_running = 0; | |
367 | ||
368 | outb(UART_FCR_ENABLE_FIFO /* Enable FIFO's (if available) */ | |
369 | | UART_FCR_CLEAR_RCVR /* Clear receiver FIFO */ | |
370 | | UART_FCR_CLEAR_XMIT /* Clear transmitter FIFO */ | |
371 | | UART_FCR_TRIGGER_4 /* Set FIFO trigger at 4-bytes */ | |
372 | /* NOTE: interrupt generated after T=(time)4-bytes | |
373 | * if less than UART_FCR_TRIGGER bytes received | |
374 | */ | |
375 | ,uart->base + UART_FCR); /* FIFO Control Register */ | |
376 | ||
377 | if ((inb(uart->base + UART_IIR) & 0xf0) == 0xc0) | |
378 | uart->fifo_limit = 16; | |
379 | if (uart->divisor != 0) { | |
380 | uart->old_line_ctrl_reg = inb(uart->base + UART_LCR); | |
381 | outb(UART_LCR_DLAB /* Divisor latch access bit */ | |
382 | ,uart->base + UART_LCR); /* Line Control Register */ | |
383 | uart->old_divisor_lsb = inb(uart->base + UART_DLL); | |
384 | uart->old_divisor_msb = inb(uart->base + UART_DLM); | |
385 | ||
386 | outb(uart->divisor | |
387 | ,uart->base + UART_DLL); /* Divisor Latch Low */ | |
388 | outb(0 | |
389 | ,uart->base + UART_DLM); /* Divisor Latch High */ | |
390 | /* DLAB is reset to 0 in next outb() */ | |
391 | } | |
392 | /* Set serial parameters (parity off, etc) */ | |
393 | outb(UART_LCR_WLEN8 /* 8 data-bits */ | |
394 | | 0 /* 1 stop-bit */ | |
395 | | 0 /* parity off */ | |
396 | | 0 /* DLAB = 0 */ | |
397 | ,uart->base + UART_LCR); /* Line Control Register */ | |
398 | ||
399 | switch (uart->adaptor) { | |
400 | default: | |
401 | outb(UART_MCR_RTS /* Set Request-To-Send line active */ | |
402 | | UART_MCR_DTR /* Set Data-Terminal-Ready line active */ | |
403 | | UART_MCR_OUT2 /* Set OUT2 - not always required, but when | |
404 | * it is, it is ESSENTIAL for enabling interrupts | |
405 | */ | |
406 | ,uart->base + UART_MCR); /* Modem Control Register */ | |
407 | break; | |
408 | case SNDRV_SERIAL_MS124W_SA: | |
409 | case SNDRV_SERIAL_MS124W_MB: | |
410 | /* MS-124W can draw power from RTS and DTR if they | |
411 | are in opposite states. */ | |
412 | outb(UART_MCR_RTS | (0&UART_MCR_DTR) | UART_MCR_OUT2, | |
413 | uart->base + UART_MCR); | |
414 | break; | |
415 | case SNDRV_SERIAL_MS124T: | |
416 | /* MS-124T can draw power from RTS and/or DTR (preferably | |
417 | both) if they are both asserted. */ | |
418 | outb(UART_MCR_RTS | UART_MCR_DTR | UART_MCR_OUT2, | |
419 | uart->base + UART_MCR); | |
420 | break; | |
421 | } | |
422 | ||
423 | if (uart->irq < 0) { | |
424 | byte = (0 & UART_IER_RDI) /* Disable Receiver data interrupt */ | |
425 | |(0 & UART_IER_THRI) /* Disable Transmitter holding register empty interrupt */ | |
426 | ; | |
427 | } else if (uart->adaptor == SNDRV_SERIAL_MS124W_SA) { | |
428 | byte = UART_IER_RDI /* Enable Receiver data interrupt */ | |
429 | | UART_IER_MSI /* Enable Modem status interrupt */ | |
430 | ; | |
431 | } else if (uart->adaptor == SNDRV_SERIAL_GENERIC) { | |
432 | byte = UART_IER_RDI /* Enable Receiver data interrupt */ | |
433 | | UART_IER_MSI /* Enable Modem status interrupt */ | |
434 | | UART_IER_THRI /* Enable Transmitter holding register empty interrupt */ | |
435 | ; | |
436 | } else { | |
437 | byte = UART_IER_RDI /* Enable Receiver data interrupt */ | |
438 | | UART_IER_THRI /* Enable Transmitter holding register empty interrupt */ | |
439 | ; | |
440 | } | |
561de31a | 441 | outb(byte, uart->base + UART_IER); /* Interrupt enable Register */ |
1da177e4 LT |
442 | |
443 | inb(uart->base + UART_LSR); /* Clear any pre-existing overrun indication */ | |
444 | inb(uart->base + UART_IIR); /* Clear any pre-existing transmit interrupt */ | |
445 | inb(uart->base + UART_RX); /* Clear any pre-existing receive interrupt */ | |
446 | } | |
447 | ||
0b830bac | 448 | static void snd_uart16550_do_close(struct snd_uart16550 * uart) |
1da177e4 LT |
449 | { |
450 | if (uart->irq < 0) | |
451 | snd_uart16550_del_timer(uart); | |
452 | ||
453 | /* NOTE: may need to disable interrupts before de-registering out handler. | |
454 | * For now, the consequences are harmless. | |
455 | */ | |
456 | ||
457 | outb((0 & UART_IER_RDI) /* Disable Receiver data interrupt */ | |
458 | |(0 & UART_IER_THRI) /* Disable Transmitter holding register empty interrupt */ | |
561de31a | 459 | ,uart->base + UART_IER); /* Interrupt enable Register */ |
1da177e4 LT |
460 | |
461 | switch (uart->adaptor) { | |
462 | default: | |
463 | outb((0 & UART_MCR_RTS) /* Deactivate Request-To-Send line */ | |
464 | |(0 & UART_MCR_DTR) /* Deactivate Data-Terminal-Ready line */ | |
465 | |(0 & UART_MCR_OUT2) /* Deactivate OUT2 */ | |
466 | ,uart->base + UART_MCR); /* Modem Control Register */ | |
467 | break; | |
468 | case SNDRV_SERIAL_MS124W_SA: | |
469 | case SNDRV_SERIAL_MS124W_MB: | |
470 | /* MS-124W can draw power from RTS and DTR if they | |
471 | are in opposite states; leave it powered. */ | |
472 | outb(UART_MCR_RTS | (0&UART_MCR_DTR) | (0&UART_MCR_OUT2), | |
473 | uart->base + UART_MCR); | |
474 | break; | |
475 | case SNDRV_SERIAL_MS124T: | |
476 | /* MS-124T can draw power from RTS and/or DTR (preferably | |
477 | both) if they are both asserted; leave it powered. */ | |
478 | outb(UART_MCR_RTS | UART_MCR_DTR | (0&UART_MCR_OUT2), | |
479 | uart->base + UART_MCR); | |
480 | break; | |
481 | } | |
482 | ||
483 | inb(uart->base + UART_IIR); /* Clear any outstanding interrupts */ | |
484 | ||
485 | /* Restore old divisor */ | |
486 | if (uart->divisor != 0) { | |
487 | outb(UART_LCR_DLAB /* Divisor latch access bit */ | |
488 | ,uart->base + UART_LCR); /* Line Control Register */ | |
489 | outb(uart->old_divisor_lsb | |
490 | ,uart->base + UART_DLL); /* Divisor Latch Low */ | |
491 | outb(uart->old_divisor_msb | |
492 | ,uart->base + UART_DLM); /* Divisor Latch High */ | |
493 | /* Restore old LCR (data bits, stop bits, parity, DLAB) */ | |
494 | outb(uart->old_line_ctrl_reg | |
495 | ,uart->base + UART_LCR); /* Line Control Register */ | |
496 | } | |
497 | } | |
498 | ||
4a4d2cfd | 499 | static int snd_uart16550_input_open(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
500 | { |
501 | unsigned long flags; | |
0b830bac | 502 | struct snd_uart16550 *uart = substream->rmidi->private_data; |
1da177e4 LT |
503 | |
504 | spin_lock_irqsave(&uart->open_lock, flags); | |
505 | if (uart->filemode == SERIAL_MODE_NOT_OPENED) | |
506 | snd_uart16550_do_open(uart); | |
507 | uart->filemode |= SERIAL_MODE_INPUT_OPEN; | |
508 | uart->midi_input[substream->number] = substream; | |
509 | spin_unlock_irqrestore(&uart->open_lock, flags); | |
510 | return 0; | |
511 | } | |
512 | ||
4a4d2cfd | 513 | static int snd_uart16550_input_close(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
514 | { |
515 | unsigned long flags; | |
0b830bac | 516 | struct snd_uart16550 *uart = substream->rmidi->private_data; |
1da177e4 LT |
517 | |
518 | spin_lock_irqsave(&uart->open_lock, flags); | |
519 | uart->filemode &= ~SERIAL_MODE_INPUT_OPEN; | |
520 | uart->midi_input[substream->number] = NULL; | |
521 | if (uart->filemode == SERIAL_MODE_NOT_OPENED) | |
522 | snd_uart16550_do_close(uart); | |
523 | spin_unlock_irqrestore(&uart->open_lock, flags); | |
524 | return 0; | |
525 | } | |
526 | ||
0b830bac TI |
527 | static void snd_uart16550_input_trigger(struct snd_rawmidi_substream *substream, |
528 | int up) | |
1da177e4 LT |
529 | { |
530 | unsigned long flags; | |
0b830bac | 531 | struct snd_uart16550 *uart = substream->rmidi->private_data; |
1da177e4 LT |
532 | |
533 | spin_lock_irqsave(&uart->open_lock, flags); | |
0b830bac | 534 | if (up) |
1da177e4 | 535 | uart->filemode |= SERIAL_MODE_INPUT_TRIGGERED; |
0b830bac | 536 | else |
1da177e4 | 537 | uart->filemode &= ~SERIAL_MODE_INPUT_TRIGGERED; |
1da177e4 LT |
538 | spin_unlock_irqrestore(&uart->open_lock, flags); |
539 | } | |
540 | ||
4a4d2cfd | 541 | static int snd_uart16550_output_open(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
542 | { |
543 | unsigned long flags; | |
0b830bac | 544 | struct snd_uart16550 *uart = substream->rmidi->private_data; |
1da177e4 LT |
545 | |
546 | spin_lock_irqsave(&uart->open_lock, flags); | |
547 | if (uart->filemode == SERIAL_MODE_NOT_OPENED) | |
548 | snd_uart16550_do_open(uart); | |
549 | uart->filemode |= SERIAL_MODE_OUTPUT_OPEN; | |
550 | uart->midi_output[substream->number] = substream; | |
551 | spin_unlock_irqrestore(&uart->open_lock, flags); | |
552 | return 0; | |
553 | }; | |
554 | ||
4a4d2cfd | 555 | static int snd_uart16550_output_close(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
556 | { |
557 | unsigned long flags; | |
0b830bac | 558 | struct snd_uart16550 *uart = substream->rmidi->private_data; |
1da177e4 LT |
559 | |
560 | spin_lock_irqsave(&uart->open_lock, flags); | |
561 | uart->filemode &= ~SERIAL_MODE_OUTPUT_OPEN; | |
562 | uart->midi_output[substream->number] = NULL; | |
563 | if (uart->filemode == SERIAL_MODE_NOT_OPENED) | |
564 | snd_uart16550_do_close(uart); | |
565 | spin_unlock_irqrestore(&uart->open_lock, flags); | |
566 | return 0; | |
567 | }; | |
568 | ||
0b830bac TI |
569 | static inline int snd_uart16550_buffer_can_write(struct snd_uart16550 *uart, |
570 | int Num) | |
1da177e4 | 571 | { |
0b830bac | 572 | if (uart->buff_in_count + Num < TX_BUFF_SIZE) |
1da177e4 LT |
573 | return 1; |
574 | else | |
575 | return 0; | |
576 | } | |
577 | ||
0b830bac TI |
578 | static inline int snd_uart16550_write_buffer(struct snd_uart16550 *uart, |
579 | unsigned char byte) | |
1da177e4 LT |
580 | { |
581 | unsigned short buff_in = uart->buff_in; | |
0b830bac | 582 | if (uart->buff_in_count < TX_BUFF_SIZE) { |
1da177e4 LT |
583 | uart->tx_buff[buff_in] = byte; |
584 | buff_in++; | |
585 | buff_in &= TX_BUFF_MASK; | |
586 | uart->buff_in = buff_in; | |
587 | uart->buff_in_count++; | |
588 | if (uart->irq < 0) /* polling mode */ | |
589 | snd_uart16550_add_timer(uart); | |
590 | return 1; | |
591 | } else | |
592 | return 0; | |
593 | } | |
594 | ||
0b830bac TI |
595 | static int snd_uart16550_output_byte(struct snd_uart16550 *uart, |
596 | struct snd_rawmidi_substream *substream, | |
597 | unsigned char midi_byte) | |
1da177e4 | 598 | { |
0b830bac | 599 | if (uart->buff_in_count == 0 /* Buffer empty? */ |
1da177e4 LT |
600 | && ((uart->adaptor != SNDRV_SERIAL_MS124W_SA && |
601 | uart->adaptor != SNDRV_SERIAL_GENERIC) || | |
0b830bac | 602 | (uart->fifo_count == 0 /* FIFO empty? */ |
1da177e4 LT |
603 | && (inb(uart->base + UART_MSR) & UART_MSR_CTS)))) { /* CTS? */ |
604 | ||
605 | /* Tx Buffer Empty - try to write immediately */ | |
606 | if ((inb(uart->base + UART_LSR) & UART_LSR_THRE) != 0) { | |
607 | /* Transmitter holding register (and Tx FIFO) empty */ | |
608 | uart->fifo_count = 1; | |
609 | outb(midi_byte, uart->base + UART_TX); | |
610 | } else { | |
611 | if (uart->fifo_count < uart->fifo_limit) { | |
612 | uart->fifo_count++; | |
613 | outb(midi_byte, uart->base + UART_TX); | |
614 | } else { | |
0b830bac TI |
615 | /* Cannot write (buffer empty) - |
616 | * put char in buffer */ | |
1da177e4 LT |
617 | snd_uart16550_write_buffer(uart, midi_byte); |
618 | } | |
619 | } | |
620 | } else { | |
0b830bac | 621 | if (!snd_uart16550_write_buffer(uart, midi_byte)) { |
45203832 TI |
622 | snd_printk(KERN_WARNING |
623 | "%s: Buffer overrun on device at 0x%lx\n", | |
1da177e4 LT |
624 | uart->rmidi->name, uart->base); |
625 | return 0; | |
626 | } | |
627 | } | |
628 | ||
629 | return 1; | |
630 | } | |
631 | ||
4a4d2cfd | 632 | static void snd_uart16550_output_write(struct snd_rawmidi_substream *substream) |
1da177e4 LT |
633 | { |
634 | unsigned long flags; | |
635 | unsigned char midi_byte, addr_byte; | |
0b830bac | 636 | struct snd_uart16550 *uart = substream->rmidi->private_data; |
1da177e4 | 637 | char first; |
0b830bac | 638 | static unsigned long lasttime = 0; |
1da177e4 | 639 | |
561de31a | 640 | /* Interrupts are disabled during the updating of the tx_buff, |
1da177e4 LT |
641 | * since it is 'bad' to have two processes updating the same |
642 | * variables (ie buff_in & buff_out) | |
643 | */ | |
644 | ||
645 | spin_lock_irqsave(&uart->open_lock, flags); | |
646 | ||
0b830bac | 647 | if (uart->irq < 0) /* polling */ |
1da177e4 LT |
648 | snd_uart16550_io_loop(uart); |
649 | ||
650 | if (uart->adaptor == SNDRV_SERIAL_MS124W_MB) { | |
651 | while (1) { | |
652 | /* buffer full? */ | |
653 | /* in this mode we need two bytes of space */ | |
654 | if (uart->buff_in_count > TX_BUFF_SIZE - 2) | |
655 | break; | |
656 | if (snd_rawmidi_transmit(substream, &midi_byte, 1) != 1) | |
657 | break; | |
658 | #ifdef SNDRV_SERIAL_MS124W_MB_NOCOMBO | |
659 | /* select exactly one of the four ports */ | |
660 | addr_byte = (1 << (substream->number + 4)) | 0x08; | |
661 | #else | |
662 | /* select any combination of the four ports */ | |
663 | addr_byte = (substream->number << 4) | 0x08; | |
664 | /* ...except none */ | |
0b830bac TI |
665 | if (addr_byte == 0x08) |
666 | addr_byte = 0xf8; | |
1da177e4 LT |
667 | #endif |
668 | snd_uart16550_output_byte(uart, substream, addr_byte); | |
669 | /* send midi byte */ | |
670 | snd_uart16550_output_byte(uart, substream, midi_byte); | |
671 | } | |
672 | } else { | |
673 | first = 0; | |
0b830bac TI |
674 | while (snd_rawmidi_transmit_peek(substream, &midi_byte, 1) == 1) { |
675 | /* Also send F5 after 3 seconds with no data | |
676 | * to handle device disconnect */ | |
677 | if (first == 0 && | |
678 | (uart->adaptor == SNDRV_SERIAL_SOUNDCANVAS || | |
679 | uart->adaptor == SNDRV_SERIAL_GENERIC) && | |
680 | (uart->prev_out != substream->number || | |
f11b7992 | 681 | time_after(jiffies, lasttime + 3*HZ))) { |
0b830bac TI |
682 | |
683 | if (snd_uart16550_buffer_can_write(uart, 3)) { | |
1da177e4 | 684 | /* Roland Soundcanvas part selection */ |
0b830bac TI |
685 | /* If this substream of the data is |
686 | * different previous substream | |
687 | * in this uart, send the change part | |
688 | * event | |
689 | */ | |
1da177e4 LT |
690 | uart->prev_out = substream->number; |
691 | /* change part */ | |
0b830bac TI |
692 | snd_uart16550_output_byte(uart, substream, |
693 | 0xf5); | |
1da177e4 | 694 | /* data */ |
0b830bac TI |
695 | snd_uart16550_output_byte(uart, substream, |
696 | uart->prev_out + 1); | |
697 | /* If midi_byte is a data byte, | |
698 | * send the previous status byte */ | |
699 | if (midi_byte < 0x80 && | |
700 | uart->adaptor == SNDRV_SERIAL_SOUNDCANVAS) | |
1da177e4 | 701 | snd_uart16550_output_byte(uart, substream, uart->prev_status[uart->prev_out]); |
0b830bac | 702 | } else if (!uart->drop_on_full) |
1da177e4 LT |
703 | break; |
704 | ||
705 | } | |
706 | ||
707 | /* send midi byte */ | |
0b830bac TI |
708 | if (!snd_uart16550_output_byte(uart, substream, midi_byte) && |
709 | !uart->drop_on_full ) | |
1da177e4 LT |
710 | break; |
711 | ||
712 | if (midi_byte >= 0x80 && midi_byte < 0xf0) | |
713 | uart->prev_status[uart->prev_out] = midi_byte; | |
714 | first = 1; | |
715 | ||
716 | snd_rawmidi_transmit_ack( substream, 1 ); | |
717 | } | |
718 | lasttime = jiffies; | |
719 | } | |
720 | spin_unlock_irqrestore(&uart->open_lock, flags); | |
721 | } | |
722 | ||
0b830bac TI |
723 | static void snd_uart16550_output_trigger(struct snd_rawmidi_substream *substream, |
724 | int up) | |
1da177e4 LT |
725 | { |
726 | unsigned long flags; | |
0b830bac | 727 | struct snd_uart16550 *uart = substream->rmidi->private_data; |
1da177e4 LT |
728 | |
729 | spin_lock_irqsave(&uart->open_lock, flags); | |
0b830bac | 730 | if (up) |
1da177e4 | 731 | uart->filemode |= SERIAL_MODE_OUTPUT_TRIGGERED; |
0b830bac | 732 | else |
1da177e4 | 733 | uart->filemode &= ~SERIAL_MODE_OUTPUT_TRIGGERED; |
1da177e4 LT |
734 | spin_unlock_irqrestore(&uart->open_lock, flags); |
735 | if (up) | |
736 | snd_uart16550_output_write(substream); | |
737 | } | |
738 | ||
c36f486d | 739 | static const struct snd_rawmidi_ops snd_uart16550_output = |
1da177e4 LT |
740 | { |
741 | .open = snd_uart16550_output_open, | |
742 | .close = snd_uart16550_output_close, | |
743 | .trigger = snd_uart16550_output_trigger, | |
744 | }; | |
745 | ||
c36f486d | 746 | static const struct snd_rawmidi_ops snd_uart16550_input = |
1da177e4 LT |
747 | { |
748 | .open = snd_uart16550_input_open, | |
749 | .close = snd_uart16550_input_close, | |
750 | .trigger = snd_uart16550_input_trigger, | |
751 | }; | |
752 | ||
fbbb01a1 BP |
753 | static int snd_uart16550_create(struct snd_card *card, |
754 | unsigned long iobase, | |
755 | int irq, | |
756 | unsigned int speed, | |
757 | unsigned int base, | |
758 | int adaptor, | |
759 | int droponfull, | |
760 | struct snd_uart16550 **ruart) | |
1da177e4 | 761 | { |
0b830bac | 762 | struct snd_uart16550 *uart; |
1da177e4 LT |
763 | int err; |
764 | ||
765 | ||
60d03de8 | 766 | uart = devm_kzalloc(card->dev, sizeof(*uart), GFP_KERNEL); |
d0ad13ef | 767 | if (!uart) |
1da177e4 LT |
768 | return -ENOMEM; |
769 | uart->adaptor = adaptor; | |
770 | uart->card = card; | |
771 | spin_lock_init(&uart->open_lock); | |
772 | uart->irq = -1; | |
773 | uart->base = iobase; | |
774 | uart->drop_on_full = droponfull; | |
775 | ||
d0ad13ef TI |
776 | err = snd_uart16550_detect(uart); |
777 | if (err <= 0) { | |
1da177e4 | 778 | printk(KERN_ERR "no UART detected at 0x%lx\n", iobase); |
68b8bc05 | 779 | return -ENODEV; |
1da177e4 LT |
780 | } |
781 | ||
782 | if (irq >= 0 && irq != SNDRV_AUTO_IRQ) { | |
60d03de8 TI |
783 | if (devm_request_irq(card->dev, irq, snd_uart16550_interrupt, |
784 | 0, "Serial MIDI", uart)) { | |
45203832 TI |
785 | snd_printk(KERN_WARNING |
786 | "irq %d busy. Using Polling.\n", irq); | |
1da177e4 LT |
787 | } else { |
788 | uart->irq = irq; | |
789 | } | |
790 | } | |
791 | uart->divisor = base / speed; | |
792 | uart->speed = base / (unsigned int)uart->divisor; | |
793 | uart->speed_base = base; | |
794 | uart->prev_out = -1; | |
795 | uart->prev_in = 0; | |
796 | uart->rstatus = 0; | |
797 | memset(uart->prev_status, 0x80, sizeof(unsigned char) * SNDRV_SERIAL_MAX_OUTS); | |
bc47ba90 | 798 | timer_setup(&uart->buffer_timer, snd_uart16550_buffer_timer, 0); |
1da177e4 LT |
799 | uart->timer_running = 0; |
800 | ||
1da177e4 LT |
801 | switch (uart->adaptor) { |
802 | case SNDRV_SERIAL_MS124W_SA: | |
803 | case SNDRV_SERIAL_MS124W_MB: | |
804 | /* MS-124W can draw power from RTS and DTR if they | |
805 | are in opposite states. */ | |
806 | outb(UART_MCR_RTS | (0&UART_MCR_DTR), uart->base + UART_MCR); | |
807 | break; | |
808 | case SNDRV_SERIAL_MS124T: | |
809 | /* MS-124T can draw power from RTS and/or DTR (preferably | |
810 | both) if they are asserted. */ | |
811 | outb(UART_MCR_RTS | UART_MCR_DTR, uart->base + UART_MCR); | |
812 | break; | |
813 | default: | |
814 | break; | |
815 | } | |
816 | ||
817 | if (ruart) | |
818 | *ruart = uart; | |
819 | ||
820 | return 0; | |
821 | } | |
822 | ||
fbbb01a1 | 823 | static void snd_uart16550_substreams(struct snd_rawmidi_str *stream) |
1da177e4 | 824 | { |
0b830bac | 825 | struct snd_rawmidi_substream *substream; |
1da177e4 | 826 | |
0b830bac | 827 | list_for_each_entry(substream, &stream->substreams, list) { |
1da177e4 LT |
828 | sprintf(substream->name, "Serial MIDI %d", substream->number + 1); |
829 | } | |
830 | } | |
831 | ||
fbbb01a1 BP |
832 | static int snd_uart16550_rmidi(struct snd_uart16550 *uart, int device, |
833 | int outs, int ins, | |
834 | struct snd_rawmidi **rmidi) | |
1da177e4 | 835 | { |
4a4d2cfd | 836 | struct snd_rawmidi *rrawmidi; |
1da177e4 LT |
837 | int err; |
838 | ||
0b830bac TI |
839 | err = snd_rawmidi_new(uart->card, "UART Serial MIDI", device, |
840 | outs, ins, &rrawmidi); | |
841 | if (err < 0) | |
1da177e4 | 842 | return err; |
0b830bac TI |
843 | snd_rawmidi_set_ops(rrawmidi, SNDRV_RAWMIDI_STREAM_INPUT, |
844 | &snd_uart16550_input); | |
845 | snd_rawmidi_set_ops(rrawmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, | |
846 | &snd_uart16550_output); | |
1da177e4 LT |
847 | strcpy(rrawmidi->name, "Serial MIDI"); |
848 | snd_uart16550_substreams(&rrawmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]); | |
849 | snd_uart16550_substreams(&rrawmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]); | |
850 | rrawmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT | | |
851 | SNDRV_RAWMIDI_INFO_INPUT | | |
852 | SNDRV_RAWMIDI_INFO_DUPLEX; | |
853 | rrawmidi->private_data = uart; | |
854 | if (rmidi) | |
855 | *rmidi = rrawmidi; | |
856 | return 0; | |
857 | } | |
858 | ||
fbbb01a1 | 859 | static int snd_serial_probe(struct platform_device *devptr) |
1da177e4 | 860 | { |
4a4d2cfd | 861 | struct snd_card *card; |
0b830bac | 862 | struct snd_uart16550 *uart; |
1da177e4 | 863 | int err; |
9caf6b59 | 864 | int dev = devptr->id; |
1da177e4 LT |
865 | |
866 | switch (adaptor[dev]) { | |
867 | case SNDRV_SERIAL_SOUNDCANVAS: | |
868 | ins[dev] = 1; | |
869 | break; | |
870 | case SNDRV_SERIAL_MS124T: | |
871 | case SNDRV_SERIAL_MS124W_SA: | |
872 | outs[dev] = 1; | |
873 | ins[dev] = 1; | |
874 | break; | |
875 | case SNDRV_SERIAL_MS124W_MB: | |
876 | outs[dev] = 16; | |
877 | ins[dev] = 1; | |
878 | break; | |
879 | case SNDRV_SERIAL_GENERIC: | |
880 | break; | |
881 | default: | |
45203832 TI |
882 | snd_printk(KERN_ERR |
883 | "Adaptor type is out of range 0-%d (%d)\n", | |
1da177e4 LT |
884 | SNDRV_SERIAL_MAX_ADAPTOR, adaptor[dev]); |
885 | return -ENODEV; | |
886 | } | |
887 | ||
888 | if (outs[dev] < 1 || outs[dev] > SNDRV_SERIAL_MAX_OUTS) { | |
45203832 TI |
889 | snd_printk(KERN_ERR |
890 | "Count of outputs is out of range 1-%d (%d)\n", | |
1da177e4 LT |
891 | SNDRV_SERIAL_MAX_OUTS, outs[dev]); |
892 | return -ENODEV; | |
893 | } | |
894 | ||
895 | if (ins[dev] < 1 || ins[dev] > SNDRV_SERIAL_MAX_INS) { | |
45203832 TI |
896 | snd_printk(KERN_ERR |
897 | "Count of inputs is out of range 1-%d (%d)\n", | |
1da177e4 LT |
898 | SNDRV_SERIAL_MAX_INS, ins[dev]); |
899 | return -ENODEV; | |
900 | } | |
901 | ||
60d03de8 TI |
902 | err = snd_devm_card_new(&devptr->dev, index[dev], id[dev], THIS_MODULE, |
903 | 0, &card); | |
bd7dd77c TI |
904 | if (err < 0) |
905 | return err; | |
1da177e4 LT |
906 | |
907 | strcpy(card->driver, "Serial"); | |
908 | strcpy(card->shortname, "Serial MIDI (UART16550A)"); | |
909 | ||
d0ad13ef TI |
910 | err = snd_uart16550_create(card, port[dev], irq[dev], speed[dev], |
911 | base[dev], adaptor[dev], droponfull[dev], | |
912 | &uart); | |
913 | if (err < 0) | |
60d03de8 | 914 | return err; |
1da177e4 | 915 | |
0b830bac TI |
916 | err = snd_uart16550_rmidi(uart, 0, outs[dev], ins[dev], &uart->rmidi); |
917 | if (err < 0) | |
60d03de8 | 918 | return err; |
1da177e4 | 919 | |
bd0185ce | 920 | sprintf(card->longname, "%s [%s] at %#lx, irq %d", |
1da177e4 | 921 | card->shortname, |
1da177e4 | 922 | adaptor_names[uart->adaptor], |
bd0185ce CL |
923 | uart->base, |
924 | uart->irq); | |
1da177e4 | 925 | |
d0ad13ef TI |
926 | err = snd_card_register(card); |
927 | if (err < 0) | |
60d03de8 | 928 | return err; |
16dab54b | 929 | |
9caf6b59 | 930 | platform_set_drvdata(devptr, card); |
1da177e4 | 931 | return 0; |
9caf6b59 TI |
932 | } |
933 | ||
934 | #define SND_SERIAL_DRIVER "snd_serial_u16550" | |
935 | ||
936 | static struct platform_driver snd_serial_driver = { | |
937 | .probe = snd_serial_probe, | |
9caf6b59 | 938 | .driver = { |
8bf01d8a | 939 | .name = SND_SERIAL_DRIVER, |
9caf6b59 TI |
940 | }, |
941 | }; | |
942 | ||
bdec0c72 | 943 | static void snd_serial_unregister_all(void) |
f7a9275d CL |
944 | { |
945 | int i; | |
946 | ||
947 | for (i = 0; i < ARRAY_SIZE(devices); ++i) | |
948 | platform_device_unregister(devices[i]); | |
949 | platform_driver_unregister(&snd_serial_driver); | |
950 | } | |
951 | ||
1da177e4 LT |
952 | static int __init alsa_card_serial_init(void) |
953 | { | |
9caf6b59 | 954 | int i, cards, err; |
1da177e4 | 955 | |
d0ad13ef TI |
956 | err = platform_driver_register(&snd_serial_driver); |
957 | if (err < 0) | |
9caf6b59 | 958 | return err; |
1da177e4 | 959 | |
9caf6b59 | 960 | cards = 0; |
8278ca8f | 961 | for (i = 0; i < SNDRV_CARDS; i++) { |
9caf6b59 | 962 | struct platform_device *device; |
8278ca8f TI |
963 | if (! enable[i]) |
964 | continue; | |
9caf6b59 TI |
965 | device = platform_device_register_simple(SND_SERIAL_DRIVER, |
966 | i, NULL, 0); | |
a182ee98 RH |
967 | if (IS_ERR(device)) |
968 | continue; | |
7152447d RH |
969 | if (!platform_get_drvdata(device)) { |
970 | platform_device_unregister(device); | |
971 | continue; | |
972 | } | |
f7a9275d | 973 | devices[i] = device; |
9caf6b59 TI |
974 | cards++; |
975 | } | |
976 | if (! cards) { | |
1da177e4 LT |
977 | #ifdef MODULE |
978 | printk(KERN_ERR "serial midi soundcard not found or device busy\n"); | |
979 | #endif | |
a182ee98 RH |
980 | snd_serial_unregister_all(); |
981 | return -ENODEV; | |
1da177e4 LT |
982 | } |
983 | return 0; | |
984 | } | |
985 | ||
986 | static void __exit alsa_card_serial_exit(void) | |
987 | { | |
f7a9275d | 988 | snd_serial_unregister_all(); |
1da177e4 LT |
989 | } |
990 | ||
991 | module_init(alsa_card_serial_init) | |
992 | module_exit(alsa_card_serial_exit) |