[linux.git] / sound / oss / uart401.c

/*
 * sound/oss/uart401.c
 *
 * MPU-401 UART driver (formerly uart401_midi.c)
 *
 *
 * Copyright (C) by Hannu Savolainen 1993-1997
 *
 * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
 * Version 2 (June 1991). See the "COPYING" file distributed with this software
 * for more info.
 *
 * Changes:
 *	Alan Cox		Reformatted, removed sound_mem usage, use normal Linux
 *				interrupt allocation. Protect against bogus unload
 *				Fixed to allow IRQ > 15
 *	Christoph Hellwig	Adapted to module_init/module_exit
 *	Arnaldo C. de Melo	got rid of check_region
 *
 * Status:
 *		Untested
 */

#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include "sound_config.h"

#include "mpu401.h"

typedef struct uart401_devc
{
	int             base;
	int             irq;
	int            *osp;
	void            (*midi_input_intr) (int dev, unsigned char data);
	int             opened, disabled;
	volatile unsigned char input_byte;
	int             my_dev;
	int             share_irq;
	spinlock_t	lock;
}
uart401_devc;

#define	DATAPORT   (devc->base)
#define	COMDPORT   (devc->base+1)
#define	STATPORT   (devc->base+1)

static int uart401_status(uart401_devc * devc)
{
	return inb(STATPORT);
}

#define input_avail(devc) (!(uart401_status(devc)&INPUT_AVAIL))
#define output_ready(devc)	(!(uart401_status(devc)&OUTPUT_READY))

static void uart401_cmd(uart401_devc * devc, unsigned char cmd)
{
	outb((cmd), COMDPORT);
}

static int uart401_read(uart401_devc * devc)
{
	return inb(DATAPORT);
}

static void uart401_write(uart401_devc * devc, unsigned char byte)
{
	outb((byte), DATAPORT);
}

#define	OUTPUT_READY	0x40
#define	INPUT_AVAIL	0x80
#define	MPU_ACK		0xFE
#define	MPU_RESET	0xFF
#define	UART_MODE_ON	0x3F

static int      reset_uart401(uart401_devc * devc);
static void     enter_uart_mode(uart401_devc * devc);

static void uart401_input_loop(uart401_devc * devc)
{
	int work_limit=30000;
	
	while (input_avail(devc) && --work_limit)
	{
		unsigned char   c = uart401_read(devc);

		if (c == MPU_ACK)
			devc->input_byte = c;
		else if (devc->opened & OPEN_READ && devc->midi_input_intr)
			devc->midi_input_intr(devc->my_dev, c);
	}
	if(work_limit==0)
		printk(KERN_WARNING "Too much work in interrupt on uart401 (0x%X). UART jabbering ??\n", devc->base);
}

irqreturn_t uart401intr(int irq, void *dev_id)
{
	uart401_devc *devc = dev_id;

	if (devc == NULL)
	{
		printk(KERN_ERR "uart401: bad devc\n");
		return IRQ_NONE;
	}

	if (input_avail(devc))
		uart401_input_loop(devc);
	return IRQ_HANDLED;
}

static int
uart401_open(int dev, int mode,
	     void            (*input) (int dev, unsigned char data),
	     void            (*output) (int dev)
)
{
	uart401_devc *devc = (uart401_devc *) midi_devs[dev]->devc;

	if (devc->opened)
		return -EBUSY;

	/* Flush the UART */
	
	while (input_avail(devc))
		uart401_read(devc);

	devc->midi_input_intr = input;
	devc->opened = mode;
	enter_uart_mode(devc);
	devc->disabled = 0;

	return 0;
}

static void uart401_close(int dev)
{
	uart401_devc *devc = (uart401_devc *) midi_devs[dev]->devc;

	reset_uart401(devc);
	devc->opened = 0;
}

static int uart401_out(int dev, unsigned char midi_byte)
{
	int timeout;
	unsigned long flags;
	uart401_devc *devc = (uart401_devc *) midi_devs[dev]->devc;

	if (devc->disabled)
		return 1;
	/*
	 * Test for input since pending input seems to block the output.
	 */

	spin_lock_irqsave(&devc->lock,flags);	
	if (input_avail(devc))
		uart401_input_loop(devc);

	spin_unlock_irqrestore(&devc->lock,flags);

	/*
	 * Sometimes it takes about 13000 loops before the output becomes ready
	 * (After reset). Normally it takes just about 10 loops.
	 */

	for (timeout = 30000; timeout > 0 && !output_ready(devc); timeout--);

	if (!output_ready(devc))
	{
		  printk(KERN_WARNING "uart401: Timeout - Device not responding\n");
		  devc->disabled = 1;
		  reset_uart401(devc);
		  enter_uart_mode(devc);
		  return 1;
	}
	uart401_write(devc, midi_byte);
	return 1;
}

static inline int uart401_start_read(int dev)
{
	return 0;
}

static inline int uart401_end_read(int dev)
{
	return 0;
}

static inline void uart401_kick(int dev)
{
}

static inline int uart401_buffer_status(int dev)
{
	return 0;
}

#define MIDI_SYNTH_NAME	"MPU-401 UART"
#define MIDI_SYNTH_CAPS	SYNTH_CAP_INPUT
#include "midi_synth.h"

static const struct midi_operations uart401_operations =
{
	.owner		= THIS_MODULE,
	.info		= {"MPU-401 (UART) MIDI", 0, 0, SNDCARD_MPU401},
	.converter	= &std_midi_synth,
	.in_info	= {0},
	.open		= uart401_open,
	.close		= uart401_close,
	.outputc	= uart401_out,
	.start_read	= uart401_start_read,
	.end_read	= uart401_end_read,
	.kick		= uart401_kick,
	.buffer_status	= uart401_buffer_status,
};

static void enter_uart_mode(uart401_devc * devc)
{
	int ok, timeout;
	unsigned long flags;

	spin_lock_irqsave(&devc->lock,flags);	
	for (timeout = 30000; timeout > 0 && !output_ready(devc); timeout--);

	devc->input_byte = 0;
	uart401_cmd(devc, UART_MODE_ON);

	ok = 0;
	for (timeout = 50000; timeout > 0 && !ok; timeout--)
		if (devc->input_byte == MPU_ACK)
			ok = 1;
		else if (input_avail(devc))
			if (uart401_read(devc) == MPU_ACK)
				ok = 1;

	spin_unlock_irqrestore(&devc->lock,flags);
}

static int reset_uart401(uart401_devc * devc)
{
	int ok, timeout, n;

	/*
	 * Send the RESET command. Try again if no success at the first time.
	 */

	ok = 0;

	for (n = 0; n < 2 && !ok; n++)
	{
		for (timeout = 30000; timeout > 0 && !output_ready(devc); timeout--);
		devc->input_byte = 0;
		uart401_cmd(devc, MPU_RESET);

		/*
		 * Wait at least 25 msec. This method is not accurate so let's make the
		 * loop bit longer. Cannot sleep since this is called during boot.
		 */

		for (timeout = 50000; timeout > 0 && !ok; timeout--)
		{
			if (devc->input_byte == MPU_ACK)	/* Interrupt */
				ok = 1;
			else if (input_avail(devc))
			{
				if (uart401_read(devc) == MPU_ACK)
					ok = 1;
			}
		}
	}


	if (ok)
	{
		DEB(printk("Reset UART401 OK\n"));
	}
	else
		DDB(printk("Reset UART401 failed - No hardware detected.\n"));

	if (ok)
		uart401_input_loop(devc);	/*
						 * Flush input before enabling interrupts
						 */

	return ok;
}

int probe_uart401(struct address_info *hw_config, struct module *owner)
{
	uart401_devc *devc;
	char *name = "MPU-401 (UART) MIDI";
	int ok = 0;
	unsigned long flags;

	DDB(printk("Entered probe_uart401()\n"));

	/* Default to "not found" */
	hw_config->slots[4] = -1;

	if (!request_region(hw_config->io_base, 4, "MPU-401 UART")) {
		printk(KERN_INFO "uart401: could not request_region(%d, 4)\n", hw_config->io_base);
		return 0;
	}

	devc = kmalloc(sizeof(uart401_devc), GFP_KERNEL);
	if (!devc) {
		printk(KERN_WARNING "uart401: Can't allocate memory\n");
		goto cleanup_region;
	}

	devc->base = hw_config->io_base;
	devc->irq = hw_config->irq;
	devc->osp = hw_config->osp;
	devc->midi_input_intr = NULL;
	devc->opened = 0;
	devc->input_byte = 0;
	devc->my_dev = 0;
	devc->share_irq = 0;
	spin_lock_init(&devc->lock);

	spin_lock_irqsave(&devc->lock,flags);	
	ok = reset_uart401(devc);
	spin_unlock_irqrestore(&devc->lock,flags);

	if (!ok)
		goto cleanup_devc;

	if (hw_config->name)
		name = hw_config->name;

	if (devc->irq < 0) {
		devc->share_irq = 1;
		devc->irq *= -1;
	} else
		devc->share_irq = 0;

	if (!devc->share_irq)
		if (request_irq(devc->irq, uart401intr, 0, "MPU-401 UART", devc) < 0) {
			printk(KERN_WARNING "uart401: Failed to allocate IRQ%d\n", devc->irq);
			devc->share_irq = 1;
		}
	devc->my_dev = sound_alloc_mididev();
	enter_uart_mode(devc);

	if (devc->my_dev == -1) {
		printk(KERN_INFO "uart401: Too many midi devices detected\n");
		goto cleanup_irq;
	}
	conf_printf(name, hw_config);
	midi_devs[devc->my_dev] = kmalloc(sizeof(struct midi_operations), GFP_KERNEL);
	if (!midi_devs[devc->my_dev]) {
		printk(KERN_ERR "uart401: Failed to allocate memory\n");
		goto cleanup_unload_mididev;
	}
	memcpy(midi_devs[devc->my_dev], &uart401_operations, sizeof(struct midi_operations));

	if (owner)
		midi_devs[devc->my_dev]->owner = owner;
	
	midi_devs[devc->my_dev]->devc = devc;
	midi_devs[devc->my_dev]->converter = kmalloc(sizeof(struct synth_operations), GFP_KERNEL);
	if (!midi_devs[devc->my_dev]->converter) {
		printk(KERN_WARNING "uart401: Failed to allocate memory\n");
		goto cleanup_midi_devs;
	}
	memcpy(midi_devs[devc->my_dev]->converter, &std_midi_synth, sizeof(struct synth_operations));
	strcpy(midi_devs[devc->my_dev]->info.name, name);
	midi_devs[devc->my_dev]->converter->id = "UART401";
	midi_devs[devc->my_dev]->converter->midi_dev = devc->my_dev;

	if (owner)
		midi_devs[devc->my_dev]->converter->owner = owner;

	hw_config->slots[4] = devc->my_dev;
	sequencer_init();
	devc->opened = 0;
	return 1;
cleanup_midi_devs:
	kfree(midi_devs[devc->my_dev]);
cleanup_unload_mididev:
	sound_unload_mididev(devc->my_dev);
cleanup_irq:
	if (!devc->share_irq)
		free_irq(devc->irq, devc);
cleanup_devc:
	kfree(devc);
cleanup_region:
	release_region(hw_config->io_base, 4);
	return 0;
}

void unload_uart401(struct address_info *hw_config)
{
	uart401_devc *devc;
	int n=hw_config->slots[4];
	
	/* Not set up */
	if(n==-1 || midi_devs[n]==NULL)
		return;
		
	/* Not allocated (erm ??) */
	
	devc = midi_devs[hw_config->slots[4]]->devc;
	if (devc == NULL)
		return;

	reset_uart401(devc);
	release_region(hw_config->io_base, 4);

	if (!devc->share_irq)
		free_irq(devc->irq, devc);
	if (devc)
	{
		kfree(midi_devs[devc->my_dev]->converter);
		kfree(midi_devs[devc->my_dev]);
		kfree(devc);
		devc = NULL;
	}
	/* This kills midi_devs[x] */
	sound_unload_mididev(hw_config->slots[4]);
}

EXPORT_SYMBOL(probe_uart401);
EXPORT_SYMBOL(unload_uart401);
EXPORT_SYMBOL(uart401intr);

static struct address_info cfg_mpu;

static int io = -1;
static int irq = -1;

module_param(io, int, 0444);
module_param(irq, int, 0444);


static int __init init_uart401(void)
{
	cfg_mpu.irq = irq;
	cfg_mpu.io_base = io;

	/* Can be loaded either for module use or to provide functions
	   to others */
	if (cfg_mpu.io_base != -1 && cfg_mpu.irq != -1) {
		printk(KERN_INFO "MPU-401 UART driver Copyright (C) Hannu Savolainen 1993-1997");
		if (!probe_uart401(&cfg_mpu, THIS_MODULE))
			return -ENODEV;
	}

	return 0;
}

static void __exit cleanup_uart401(void)
{
	if (cfg_mpu.io_base != -1 && cfg_mpu.irq != -1)
		unload_uart401(&cfg_mpu);
}

module_init(init_uart401);
module_exit(cleanup_uart401);

#ifndef MODULE
static int __init setup_uart401(char *str)
{
	/* io, irq */
	int ints[3];
	
	str = get_options(str, ARRAY_SIZE(ints), ints);

	io = ints[1];
	irq = ints[2];
	
	return 1;
}

__setup("uart401=", setup_uart401);
#endif
MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4	1	/*
f30c2269	2	* sound/oss/uart401.c
1da177e4 LT	3	*
	4	* MPU-401 UART driver (formerly uart401_midi.c)
	5	*
	6	*
	7	* Copyright (C) by Hannu Savolainen 1993-1997
	8	*
	9	* OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
	10	* Version 2 (June 1991). See the "COPYING" file distributed with this software
	11	* for more info.
	12	*
	13	* Changes:
	14	* Alan Cox Reformatted, removed sound_mem usage, use normal Linux
	15	* interrupt allocation. Protect against bogus unload
	16	* Fixed to allow IRQ > 15
	17	* Christoph Hellwig Adapted to module_init/module_exit
	18	* Arnaldo C. de Melo got rid of check_region
	19	*
	20	* Status:
	21	* Untested
	22	*/
	23
	24	#include <linux/init.h>
	25	#include <linux/interrupt.h>
	26	#include <linux/module.h>
5a0e3ad6	27	#include <linux/slab.h>
1da177e4 LT	28	#include <linux/spinlock.h>
	29	#include "sound_config.h"
	30
	31	#include "mpu401.h"
	32
	33	typedef struct uart401_devc
	34	{
	35	int base;
	36	int irq;
	37	int *osp;
	38	void (*midi_input_intr) (int dev, unsigned char data);
	39	int opened, disabled;
	40	volatile unsigned char input_byte;
	41	int my_dev;
	42	int share_irq;
	43	spinlock_t lock;
	44	}
	45	uart401_devc;
	46
	47	#define DATAPORT (devc->base)
	48	#define COMDPORT (devc->base+1)
	49	#define STATPORT (devc->base+1)
	50
	51	static int uart401_status(uart401_devc * devc)
	52	{
	53	return inb(STATPORT);
	54	}
	55
	56	#define input_avail(devc) (!(uart401_status(devc)&INPUT_AVAIL))
	57	#define output_ready(devc) (!(uart401_status(devc)&OUTPUT_READY))
	58
	59	static void uart401_cmd(uart401_devc * devc, unsigned char cmd)
	60	{
	61	outb((cmd), COMDPORT);
	62	}
	63
	64	static int uart401_read(uart401_devc * devc)
	65	{
	66	return inb(DATAPORT);
	67	}
	68
	69	static void uart401_write(uart401_devc * devc, unsigned char byte)
	70	{
	71	outb((byte), DATAPORT);
	72	}
	73
	74	#define OUTPUT_READY 0x40
	75	#define INPUT_AVAIL 0x80
	76	#define MPU_ACK 0xFE
	77	#define MPU_RESET 0xFF
	78	#define UART_MODE_ON 0x3F
	79
	80	static int reset_uart401(uart401_devc * devc);
	81	static void enter_uart_mode(uart401_devc * devc);
	82
	83	static void uart401_input_loop(uart401_devc * devc)
	84	{
	85	int work_limit=30000;
	86
	87	while (input_avail(devc) && --work_limit)
	88	{
	89	unsigned char c = uart401_read(devc);
	90
	91	if (c == MPU_ACK)
92	devc->input_byte = c;
93	else if (devc->opened & OPEN_READ && devc->midi_input_intr)
94	devc->midi_input_intr(devc->my_dev, c);
95	}
96	if(work_limit==0)
97	printk(KERN_WARNING "Too much work in interrupt on uart401 (0x%X). UART jabbering ??\n", devc->base);
98	}
99
7d12e780	100	irqreturn_t uart401intr(int irq, void *dev_id)
1da177e4 LT	101	{
	102	uart401_devc *devc = dev_id;
	103
	104	if (devc == NULL)
	105	{
	106	printk(KERN_ERR "uart401: bad devc\n");
	107	return IRQ_NONE;
	108	}
	109
	110	if (input_avail(devc))
	111	uart401_input_loop(devc);
	112	return IRQ_HANDLED;
	113	}
	114
	115	static int
	116	uart401_open(int dev, int mode,
	117	void (*input) (int dev, unsigned char data),
	118	void (*output) (int dev)
	119	)
	120	{
	121	uart401_devc devc = (uart401_devc ) midi_devs[dev]->devc;
	122
	123	if (devc->opened)
	124	return -EBUSY;
	125
	126	/* Flush the UART */
	127
	128	while (input_avail(devc))
	129	uart401_read(devc);
	130
	131	devc->midi_input_intr = input;
	132	devc->opened = mode;
	133	enter_uart_mode(devc);
	134	devc->disabled = 0;
	135
	136	return 0;
	137	}
	138
	139	static void uart401_close(int dev)
	140	{
	141	uart401_devc devc = (uart401_devc ) midi_devs[dev]->devc;
	142
	143	reset_uart401(devc);
	144	devc->opened = 0;
	145	}
	146
	147	static int uart401_out(int dev, unsigned char midi_byte)
	148	{
	149	int timeout;
	150	unsigned long flags;
	151	uart401_devc devc = (uart401_devc ) midi_devs[dev]->devc;
	152
	153	if (devc->disabled)
	154	return 1;
	155	/*
	156	* Test for input since pending input seems to block the output.
	157	*/
	158
	159	spin_lock_irqsave(&devc->lock,flags);
	160	if (input_avail(devc))
	161	uart401_input_loop(devc);
	162
	163	spin_unlock_irqrestore(&devc->lock,flags);
	164
165	/*
166	* Sometimes it takes about 13000 loops before the output becomes ready
167	* (After reset). Normally it takes just about 10 loops.
168	*/
169
170	for (timeout = 30000; timeout > 0 && !output_ready(devc); timeout--);
171
172	if (!output_ready(devc))
173	{
174	printk(KERN_WARNING "uart401: Timeout - Device not responding\n");
175	devc->disabled = 1;
176	reset_uart401(devc);
177	enter_uart_mode(devc);
178	return 1;
179	}
180	uart401_write(devc, midi_byte);
181	return 1;
182	}
183
184	static inline int uart401_start_read(int dev)
185	{
186	return 0;
187	}
188
189	static inline int uart401_end_read(int dev)
190	{
191	return 0;
192	}
193
194	static inline void uart401_kick(int dev)
195	{
196	}
197
198	static inline int uart401_buffer_status(int dev)
199	{
200	return 0;
201	}
202
203	#define MIDI_SYNTH_NAME "MPU-401 UART"
204	#define MIDI_SYNTH_CAPS SYNTH_CAP_INPUT
205	#include "midi_synth.h"
206
207	static const struct midi_operations uart401_operations =
208	{
209	.owner = THIS_MODULE,
210	.info = {"MPU-401 (UART) MIDI", 0, 0, SNDCARD_MPU401},
211	.converter = &std_midi_synth,
212	.in_info = {0},
213	.open = uart401_open,
214	.close = uart401_close,
215	.outputc = uart401_out,
216	.start_read = uart401_start_read,
217	.end_read = uart401_end_read,
218	.kick = uart401_kick,
219	.buffer_status = uart401_buffer_status,
220	};
221
222	static void enter_uart_mode(uart401_devc * devc)
223	{
224	int ok, timeout;
225	unsigned long flags;
226
227	spin_lock_irqsave(&devc->lock,flags);
228	for (timeout = 30000; timeout > 0 && !output_ready(devc); timeout--);
229
230	devc->input_byte = 0;
231	uart401_cmd(devc, UART_MODE_ON);
232
233	ok = 0;
234	for (timeout = 50000; timeout > 0 && !ok; timeout--)
235	if (devc->input_byte == MPU_ACK)
236	ok = 1;
237	else if (input_avail(devc))
238	if (uart401_read(devc) == MPU_ACK)
239	ok = 1;
240
241	spin_unlock_irqrestore(&devc->lock,flags);
242	}
243
244	static int reset_uart401(uart401_devc * devc)
245	{
246	int ok, timeout, n;
247
248	/*
249	* Send the RESET command. Try again if no success at the first time.
250	*/
251
252	ok = 0;
253
254	for (n = 0; n < 2 && !ok; n++)
255	{
256	for (timeout = 30000; timeout > 0 && !output_ready(devc); timeout--);
257	devc->input_byte = 0;
258	uart401_cmd(devc, MPU_RESET);
259
260	/*
261	* Wait at least 25 msec. This method is not accurate so let's make the
262	* loop bit longer. Cannot sleep since this is called during boot.
263	*/
264
265	for (timeout = 50000; timeout > 0 && !ok; timeout--)
266	{
267	if (devc->input_byte == MPU_ACK) /* Interrupt */
268	ok = 1;
269	else if (input_avail(devc))
270	{
271	if (uart401_read(devc) == MPU_ACK)
272	ok = 1;
273	}
274	}
275	}
276
277
278	if (ok)
279	{
280	DEB(printk("Reset UART401 OK\n"));
281	}
282	else
283	DDB(printk("Reset UART401 failed - No hardware detected.\n"));
284
285	if (ok)
286	uart401_input_loop(devc); /*
287	* Flush input before enabling interrupts
288	*/
289
290	return ok;
291	}
292
293	int probe_uart401(struct address_info hw_config, struct module owner)
294	{
295	uart401_devc *devc;
296	char *name = "MPU-401 (UART) MIDI";
297	int ok = 0;
298	unsigned long flags;
299
300	DDB(printk("Entered probe_uart401()\n"));
301
302	/* Default to "not found" */
303	hw_config->slots[4] = -1;
304
305	if (!request_region(hw_config->io_base, 4, "MPU-401 UART")) {
306	printk(KERN_INFO "uart401: could not request_region(%d, 4)\n", hw_config->io_base);
307	return 0;
308	}
309
310	devc = kmalloc(sizeof(uart401_devc), GFP_KERNEL);
311	if (!devc) {
312	printk(KERN_WARNING "uart401: Can't allocate memory\n");
313	goto cleanup_region;
314	}
315
316	devc->base = hw_config->io_base;
317	devc->irq = hw_config->irq;
318	devc->osp = hw_config->osp;
319	devc->midi_input_intr = NULL;
320	devc->opened = 0;
321	devc->input_byte = 0;
322	devc->my_dev = 0;
323	devc->share_irq = 0;
324	spin_lock_init(&devc->lock);
325
326	spin_lock_irqsave(&devc->lock,flags);
327	ok = reset_uart401(devc);
328	spin_unlock_irqrestore(&devc->lock,flags);
329
330	if (!ok)
331	goto cleanup_devc;
332
333	if (hw_config->name)
334	name = hw_config->name;
335
336	if (devc->irq < 0) {
337	devc->share_irq = 1;
338	devc->irq *= -1;
339	} else
340	devc->share_irq = 0;
341
342	if (!devc->share_irq)
343	if (request_irq(devc->irq, uart401intr, 0, "MPU-401 UART", devc) < 0) {
344	printk(KERN_WARNING "uart401: Failed to allocate IRQ%d\n", devc->irq);
345	devc->share_irq = 1;
346	}
347	devc->my_dev = sound_alloc_mididev();
348	enter_uart_mode(devc);
349
350	if (devc->my_dev == -1) {
351	printk(KERN_INFO "uart401: Too many midi devices detected\n");
352	goto cleanup_irq;
353	}
354	conf_printf(name, hw_config);
355	midi_devs[devc->my_dev] = kmalloc(sizeof(struct midi_operations), GFP_KERNEL);
356	if (!midi_devs[devc->my_dev]) {
357	printk(KERN_ERR "uart401: Failed to allocate memory\n");
358	goto cleanup_unload_mididev;
359	}
360	memcpy(midi_devs[devc->my_dev], &uart401_operations, sizeof(struct midi_operations));
361
362	if (owner)
363	midi_devs[devc->my_dev]->owner = owner;
364
365	midi_devs[devc->my_dev]->devc = devc;
366	midi_devs[devc->my_dev]->converter = kmalloc(sizeof(struct synth_operations), GFP_KERNEL);
367	if (!midi_devs[devc->my_dev]->converter) {
368	printk(KERN_WARNING "uart401: Failed to allocate memory\n");
369	goto cleanup_midi_devs;
370	}
371	memcpy(midi_devs[devc->my_dev]->converter, &std_midi_synth, sizeof(struct synth_operations));
372	strcpy(midi_devs[devc->my_dev]->info.name, name);
373	midi_devs[devc->my_dev]->converter->id = "UART401";
374	midi_devs[devc->my_dev]->converter->midi_dev = devc->my_dev;
375
376	if (owner)
377	midi_devs[devc->my_dev]->converter->owner = owner;
378
379	hw_config->slots[4] = devc->my_dev;
380	sequencer_init();
381	devc->opened = 0;
382	return 1;
383	cleanup_midi_devs:
384	kfree(midi_devs[devc->my_dev]);
385	cleanup_unload_mididev:
386	sound_unload_mididev(devc->my_dev);
387	cleanup_irq:
388	if (!devc->share_irq)
389	free_irq(devc->irq, devc);
390	cleanup_devc:
391	kfree(devc);
392	cleanup_region:
393	release_region(hw_config->io_base, 4);
394	return 0;
395	}
396
397	void unload_uart401(struct address_info *hw_config)
398	{
399	uart401_devc *devc;
400	int n=hw_config->slots[4];
401
402	/* Not set up */
403	if(n==-1 \|\| midi_devs[n]==NULL)
404	return;
405
406	/* Not allocated (erm ??) */
407
408	devc = midi_devs[hw_config->slots[4]]->devc;
409	if (devc == NULL)
410	return;
411
412	reset_uart401(devc);
413	release_region(hw_config->io_base, 4);
414
415	if (!devc->share_irq)
416	free_irq(devc->irq, devc);
417	if (devc)
418	{
419	kfree(midi_devs[devc->my_dev]->converter);
420	kfree(midi_devs[devc->my_dev]);
421	kfree(devc);
422	devc = NULL;
423	}
424	/* This kills midi_devs[x] */
425	sound_unload_mididev(hw_config->slots[4]);
426	}
427
428	EXPORT_SYMBOL(probe_uart401);
429	EXPORT_SYMBOL(unload_uart401);
430	EXPORT_SYMBOL(uart401intr);
431
432	static struct address_info cfg_mpu;
433
434	static int io = -1;
435	static int irq = -1;
436
437	module_param(io, int, 0444);
438	module_param(irq, int, 0444);
439
440
441	static int __init init_uart401(void)
442	{
443	cfg_mpu.irq = irq;
444	cfg_mpu.io_base = io;
445
446	/* Can be loaded either for module use or to provide functions
447	to others */
448	if (cfg_mpu.io_base != -1 && cfg_mpu.irq != -1) {
449	printk(KERN_INFO "MPU-401 UART driver Copyright (C) Hannu Savolainen 1993-1997");
450	if (!probe_uart401(&cfg_mpu, THIS_MODULE))
451	return -ENODEV;
452	}
453
454	return 0;
455	}
456
457	static void __exit cleanup_uart401(void)
458	{
459	if (cfg_mpu.io_base != -1 && cfg_mpu.irq != -1)
460	unload_uart401(&cfg_mpu);
461	}
462
463	module_init(init_uart401);
464	module_exit(cleanup_uart401);
465
466	#ifndef MODULE
467	static int __init setup_uart401(char *str)
468	{
469	/* io, irq */
470	int ints[3];
471
472	str = get_options(str, ARRAY_SIZE(ints), ints);
473
474	io = ints[1];
475	irq = ints[2];
476
477	return 1;
478	}
479
480	__setup("uart401=", setup_uart401);
481	#endif
482	MODULE_LICENSE("GPL");