[deliverable/linux.git] / arch / m68k / q40 / q40ints.c

/*
 * arch/m68k/q40/q40ints.c
 *
 * Copyright (C) 1999,2001 Richard Zidlicky
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file COPYING in the main directory of this archive
 * for more details.
 *
 * .. used to be loosely based on bvme6000ints.c
 *
 */

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/interrupt.h>

#include <asm/ptrace.h>
#include <asm/system.h>
#include <asm/irq.h>
#include <asm/traps.h>

#include <asm/q40_master.h>
#include <asm/q40ints.h>

/*
 * Q40 IRQs are defined as follows:
 *            3,4,5,6,7,10,11,14,15 : ISA dev IRQs
 *            16-31: reserved
 *            32   : keyboard int
 *            33   : frame int (50/200 Hz periodic timer)
 *            34   : sample int (10/20 KHz periodic timer)
 *
*/

static void q40_irq_handler(unsigned int, struct pt_regs *fp);
static void q40_enable_irq(unsigned int);
static void q40_disable_irq(unsigned int);

unsigned short q40_ablecount[35];
unsigned short q40_state[35];

static int q40_irq_startup(unsigned int irq)
{
	/* test for ISA ints not implemented by HW */
	switch (irq) {
	case 1: case 2: case 8: case 9:
	case 11: case 12: case 13:
		printk("%s: ISA IRQ %d not implemented by HW\n", __FUNCTION__, irq);
		return -ENXIO;
	}
	return 0;
}

static void q40_irq_shutdown(unsigned int irq)
{
}

static struct irq_controller q40_irq_controller = {
	.name		= "q40",
	.lock		= __SPIN_LOCK_UNLOCKED(q40_irq_controller.lock),
	.startup	= q40_irq_startup,
	.shutdown	= q40_irq_shutdown,
	.enable		= q40_enable_irq,
	.disable	= q40_disable_irq,
};

/*
 * void q40_init_IRQ (void)
 *
 * Parameters:	None
 *
 * Returns:	Nothing
 *
 * This function is called during kernel startup to initialize
 * the q40 IRQ handling routines.
 */

static int disabled;

void __init q40_init_IRQ(void)
{
	m68k_setup_irq_controller(&q40_irq_controller, 1, Q40_IRQ_MAX);

	/* setup handler for ISA ints */
	m68k_setup_auto_interrupt(q40_irq_handler);

	m68k_irq_startup(IRQ_AUTO_2);
	m68k_irq_startup(IRQ_AUTO_4);

	/* now enable some ints.. */
	master_outb(1, EXT_ENABLE_REG);  /* ISA IRQ 5-15 */

	/* make sure keyboard IRQ is disabled */
	master_outb(0, KEY_IRQ_ENABLE_REG);
}


/*
 * this stuff doesn't really belong here..
 */

int ql_ticks;              /* 200Hz ticks since last jiffie */
static int sound_ticks;

#define SVOL 45

void q40_mksound(unsigned int hz, unsigned int ticks)
{
	/* for now ignore hz, except that hz==0 switches off sound */
	/* simply alternate the ampl (128-SVOL)-(128+SVOL)-..-.. at 200Hz */
	if (hz == 0) {
		if (sound_ticks)
			sound_ticks = 1;

		*DAC_LEFT = 128;
		*DAC_RIGHT = 128;

		return;
	}
	/* sound itself is done in q40_timer_int */
	if (sound_ticks == 0)
		sound_ticks = 1000; /* pretty long beep */
	sound_ticks = ticks << 1;
}

static irq_handler_t q40_timer_routine;

static irqreturn_t q40_timer_int (int irq, void * dev)
{
	ql_ticks = ql_ticks ? 0 : 1;
	if (sound_ticks) {
		unsigned char sval=(sound_ticks & 1) ? 128-SVOL : 128+SVOL;
		sound_ticks--;
		*DAC_LEFT=sval;
		*DAC_RIGHT=sval;
	}

	if (!ql_ticks)
		q40_timer_routine(irq, dev);
	return IRQ_HANDLED;
}

void q40_sched_init (irq_handler_t timer_routine)
{
	int timer_irq;

	q40_timer_routine = timer_routine;
	timer_irq = Q40_IRQ_FRAME;

	if (request_irq(timer_irq, q40_timer_int, 0,
				"timer", q40_timer_int))
		panic("Couldn't register timer int");

	master_outb(-1, FRAME_CLEAR_REG);
	master_outb( 1, FRAME_RATE_REG);
}


/*
 * tables to translate bits into IRQ numbers
 * it is a good idea to order the entries by priority
 *
*/

struct IRQ_TABLE{ unsigned mask; int irq ;};
#if 0
static struct IRQ_TABLE iirqs[]={
  {Q40_IRQ_FRAME_MASK,Q40_IRQ_FRAME},
  {Q40_IRQ_KEYB_MASK,Q40_IRQ_KEYBOARD},
  {0,0}};
#endif
static struct IRQ_TABLE eirqs[] = {
  { .mask = Q40_IRQ3_MASK,	.irq = 3 },	/* ser 1 */
  { .mask = Q40_IRQ4_MASK,	.irq = 4 },	/* ser 2 */
  { .mask = Q40_IRQ14_MASK,	.irq = 14 },	/* IDE 1 */
  { .mask = Q40_IRQ15_MASK,	.irq = 15 },	/* IDE 2 */
  { .mask = Q40_IRQ6_MASK,	.irq = 6 },	/* floppy, handled elsewhere */
  { .mask = Q40_IRQ7_MASK,	.irq = 7 },	/* par */
  { .mask = Q40_IRQ5_MASK,	.irq = 5 },
  { .mask = Q40_IRQ10_MASK,	.irq = 10 },
  {0,0}
};

/* complain only this many times about spurious ints : */
static int ccleirq=60;    /* ISA dev IRQ's*/
/*static int cclirq=60;*/     /* internal */

/* FIXME: add shared ints,mask,unmask,probing.... */

#define IRQ_INPROGRESS 1
/*static unsigned short saved_mask;*/
//static int do_tint=0;

#define DEBUG_Q40INT
/*#define IP_USE_DISABLE *//* would be nice, but crashes ???? */

static int mext_disabled=0;  /* ext irq disabled by master chip? */
static int aliased_irq=0;  /* how many times inside handler ?*/


/* got interrupt, dispatch to ISA or keyboard/timer IRQs */
static void q40_irq_handler(unsigned int irq, struct pt_regs *fp)
{
	unsigned mir, mer;
	int i;

//repeat:
	mir = master_inb(IIRQ_REG);
#ifdef CONFIG_BLK_DEV_FD
	if ((mir & Q40_IRQ_EXT_MASK) &&
	    (master_inb(EIRQ_REG) & Q40_IRQ6_MASK)) {
		floppy_hardint();
		return;
	}
#endif
	switch (irq) {
	case 4:
	case 6:
		__m68k_handle_int(Q40_IRQ_SAMPLE, fp);
		return;
	}
	if (mir & Q40_IRQ_FRAME_MASK) {
		__m68k_handle_int(Q40_IRQ_FRAME, fp);
		master_outb(-1, FRAME_CLEAR_REG);
	}
	if ((mir & Q40_IRQ_SER_MASK) || (mir & Q40_IRQ_EXT_MASK)) {
		mer = master_inb(EIRQ_REG);
		for (i = 0; eirqs[i].mask; i++) {
			if (mer & eirqs[i].mask) {
				irq = eirqs[i].irq;
/*
 * There is a little mess wrt which IRQ really caused this irq request. The
 * main problem is that IIRQ_REG and EIRQ_REG reflect the state when they
 * are read - which is long after the request came in. In theory IRQs should
 * not just go away but they occassionally do
 */
				if (irq > 4 && irq <= 15 && mext_disabled) {
					/*aliased_irq++;*/
					goto iirq;
				}
				if (q40_state[irq] & IRQ_INPROGRESS) {
					/* some handlers do local_irq_enable() for irq latency reasons, */
					/* however reentering an active irq handler is not permitted */
#ifdef IP_USE_DISABLE
					/* in theory this is the better way to do it because it still */
					/* lets through eg the serial irqs, unfortunately it crashes */
					disable_irq(irq);
					disabled = 1;
#else
					/*printk("IRQ_INPROGRESS detected for irq %d, disabling - %s disabled\n",
						irq, disabled ? "already" : "not yet"); */
					fp->sr = (((fp->sr) & (~0x700))+0x200);
					disabled = 1;
#endif
					goto iirq;
				}
				q40_state[irq] |= IRQ_INPROGRESS;
				__m68k_handle_int(irq, fp);
				q40_state[irq] &= ~IRQ_INPROGRESS;

				/* naively enable everything, if that fails than    */
				/* this function will be reentered immediately thus */
				/* getting another chance to disable the IRQ        */

				if (disabled) {
#ifdef IP_USE_DISABLE
					if (irq > 4) {
						disabled = 0;
						enable_irq(irq);
					}
#else
					disabled = 0;
					/*printk("reenabling irq %d\n", irq); */
#endif
				}
// used to do 'goto repeat;' here, this delayed bh processing too long
				return;
			}
		}
		if (mer && ccleirq > 0 && !aliased_irq) {
			printk("ISA interrupt from unknown source? EIRQ_REG = %x\n",mer);
			ccleirq--;
		}
	}
 iirq:
	mir = master_inb(IIRQ_REG);
	/* should test whether keyboard irq is really enabled, doing it in defhand */
	if (mir & Q40_IRQ_KEYB_MASK)
		__m68k_handle_int(Q40_IRQ_KEYBOARD, fp);

	return;
}

void q40_enable_irq(unsigned int irq)
{
	if (irq >= 5 && irq <= 15) {
		mext_disabled--;
		if (mext_disabled > 0)
			printk("q40_enable_irq : nested disable/enable\n");
		if (mext_disabled == 0)
			master_outb(1, EXT_ENABLE_REG);
	}
}


void q40_disable_irq(unsigned int irq)
{
	/* disable ISA iqs : only do something if the driver has been
	 * verified to be Q40 "compatible" - right now IDE, NE2K
	 * Any driver should not attempt to sleep across disable_irq !!
	 */

	if (irq >= 5 && irq <= 15) {
		master_outb(0, EXT_ENABLE_REG);
		mext_disabled++;
		if (mext_disabled > 1)
			printk("disable_irq nesting count %d\n",mext_disabled);
	}
}

unsigned long q40_probe_irq_on(void)
{
	printk("irq probing not working - reconfigure the driver to avoid this\n");
	return -1;
}
int q40_probe_irq_off(unsigned long irqs)
{
	return -1;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* arch/m68k/q40/q40ints.c
	3	*
	4	* Copyright (C) 1999,2001 Richard Zidlicky
	5	*
	6	* This file is subject to the terms and conditions of the GNU General Public
	7	* License. See the file COPYING in the main directory of this archive
	8	* for more details.
	9	*
	10	* .. used to be loosely based on bvme6000ints.c
	11	*
	12	*/
	13
	14	#include <linux/types.h>
	15	#include <linux/kernel.h>
	16	#include <linux/errno.h>
1da177e4	17	#include <linux/interrupt.h>
1da177e4	18
1da177e4 LT	19	#include <asm/ptrace.h>
	20	#include <asm/system.h>
	21	#include <asm/irq.h>
	22	#include <asm/traps.h>
	23
	24	#include <asm/q40_master.h>
	25	#include <asm/q40ints.h>
	26
	27	/*
	28	* Q40 IRQs are defined as follows:
	29	* 3,4,5,6,7,10,11,14,15 : ISA dev IRQs
	30	* 16-31: reserved
	31	* 32 : keyboard int
	32	* 33 : frame int (50/200 Hz periodic timer)
	33	* 34 : sample int (10/20 KHz periodic timer)
	34	*
	35	*/
	36
77dda339 RZ	37	static void q40_irq_handler(unsigned int, struct pt_regs *fp);
	38	static void q40_enable_irq(unsigned int);
	39	static void q40_disable_irq(unsigned int);
1da177e4	40
77dda339 RZ	41	unsigned short q40_ablecount[35];
77dda339 RZ	42	unsigned short q40_state[35];
1da177e4	43
77dda339 RZ	44	static int q40_irq_startup(unsigned int irq)
	45	{
	46	/* test for ISA ints not implemented by HW */
	47	switch (irq) {
	48	case 1: case 2: case 8: case 9:
	49	case 11: case 12: case 13:
	50	printk("%s: ISA IRQ %d not implemented by HW\n", __FUNCTION__, irq);
	51	return -ENXIO;
	52	}
	53	return 0;
	54	}
1da177e4	55
77dda339 RZ	56	static void q40_irq_shutdown(unsigned int irq)
	57	{
	58	}
1da177e4	59
77dda339 RZ	60	static struct irq_controller q40_irq_controller = {
77dda339 RZ	61	.name = "q40",
241258d1	62	.lock = __SPIN_LOCK_UNLOCKED(q40_irq_controller.lock),
77dda339 RZ	63	.startup = q40_irq_startup,
	64	.shutdown = q40_irq_shutdown,
	65	.enable = q40_enable_irq,
	66	.disable = q40_disable_irq,
	67	};
1da177e4 LT	68
	69	/*
	70	* void q40_init_IRQ (void)
	71	*
	72	* Parameters: None
	73	*
	74	* Returns: Nothing
	75	*
	76	* This function is called during kernel startup to initialize
	77	* the q40 IRQ handling routines.
	78	*/
	79
77dda339	80	static int disabled;
1da177e4	81
66a3f820	82	void __init q40_init_IRQ(void)
1da177e4	83	{
77dda339	84	m68k_setup_irq_controller(&q40_irq_controller, 1, Q40_IRQ_MAX);
1da177e4 LT	85
1da177e4 LT	86	/* setup handler for ISA ints */
77dda339 RZ	87	m68k_setup_auto_interrupt(q40_irq_handler);
	88
	89	m68k_irq_startup(IRQ_AUTO_2);
	90	m68k_irq_startup(IRQ_AUTO_4);
1da177e4 LT	91
1da177e4 LT	92	/* now enable some ints.. */
77dda339	93	master_outb(1, EXT_ENABLE_REG); /* ISA IRQ 5-15 */
1da177e4 LT	94
1da177e4 LT	95	/* make sure keyboard IRQ is disabled */
77dda339	96	master_outb(0, KEY_IRQ_ENABLE_REG);
1da177e4 LT	97	}
1da177e4 LT	98
1da177e4 LT	99
	100	/*
	101	* this stuff doesn't really belong here..
77dda339	102	*/
1da177e4 LT	103
	104	int ql_ticks; /* 200Hz ticks since last jiffie */
	105	static int sound_ticks;
	106
	107	#define SVOL 45
	108
	109	void q40_mksound(unsigned int hz, unsigned int ticks)
	110	{
77dda339 RZ	111	/* for now ignore hz, except that hz==0 switches off sound */
	112	/* simply alternate the ampl (128-SVOL)-(128+SVOL)-..-.. at 200Hz */
	113	if (hz == 0) {
	114	if (sound_ticks)
	115	sound_ticks = 1;
	116
	117	*DAC_LEFT = 128;
	118	*DAC_RIGHT = 128;
	119
	120	return;
	121	}
	122	/* sound itself is done in q40_timer_int */
	123	if (sound_ticks == 0)
	124	sound_ticks = 1000; /* pretty long beep */
	125	sound_ticks = ticks << 1;
1da177e4 LT	126	}
1da177e4 LT	127
40220c1a	128	static irq_handler_t q40_timer_routine;
1da177e4	129
2850bc27	130	static irqreturn_t q40_timer_int (int irq, void * dev)
1da177e4	131	{
77dda339 RZ	132	ql_ticks = ql_ticks ? 0 : 1;
	133	if (sound_ticks) {
	134	unsigned char sval=(sound_ticks & 1) ? 128-SVOL : 128+SVOL;
	135	sound_ticks--;
	136	*DAC_LEFT=sval;
	137	*DAC_RIGHT=sval;
	138	}
	139
	140	if (!ql_ticks)
2850bc27	141	q40_timer_routine(irq, dev);
77dda339	142	return IRQ_HANDLED;
1da177e4 LT	143	}
1da177e4 LT	144
40220c1a	145	void q40_sched_init (irq_handler_t timer_routine)
1da177e4	146	{
77dda339	147	int timer_irq;
1da177e4	148
77dda339 RZ	149	q40_timer_routine = timer_routine;
77dda339 RZ	150	timer_irq = Q40_IRQ_FRAME;
1da177e4	151
77dda339	152	if (request_irq(timer_irq, q40_timer_int, 0,
1da177e4	153	"timer", q40_timer_int))
77dda339	154	panic("Couldn't register timer int");
1da177e4	155
77dda339 RZ	156	master_outb(-1, FRAME_CLEAR_REG);
77dda339 RZ	157	master_outb( 1, FRAME_RATE_REG);
1da177e4 LT	158	}
	159
	160
	161	/*
	162	* tables to translate bits into IRQ numbers
	163	* it is a good idea to order the entries by priority
	164	*
	165	*/
	166
	167	struct IRQ_TABLE{ unsigned mask; int irq ;};
	168	#if 0
	169	static struct IRQ_TABLE iirqs[]={
	170	{Q40_IRQ_FRAME_MASK,Q40_IRQ_FRAME},
	171	{Q40_IRQ_KEYB_MASK,Q40_IRQ_KEYBOARD},
	172	{0,0}};
	173	#endif
	174	static struct IRQ_TABLE eirqs[] = {
	175	{ .mask = Q40_IRQ3_MASK, .irq = 3 }, /* ser 1 */
	176	{ .mask = Q40_IRQ4_MASK, .irq = 4 }, /* ser 2 */
	177	{ .mask = Q40_IRQ14_MASK, .irq = 14 }, /* IDE 1 */
	178	{ .mask = Q40_IRQ15_MASK, .irq = 15 }, /* IDE 2 */
	179	{ .mask = Q40_IRQ6_MASK, .irq = 6 }, /* floppy, handled elsewhere */
	180	{ .mask = Q40_IRQ7_MASK, .irq = 7 }, /* par */
	181	{ .mask = Q40_IRQ5_MASK, .irq = 5 },
	182	{ .mask = Q40_IRQ10_MASK, .irq = 10 },
	183	{0,0}
	184	};
	185
	186	/* complain only this many times about spurious ints : */
	187	static int ccleirq=60; /* ISA dev IRQ's*/
	188	/static int cclirq=60;/ /* internal */
	189
	190	/* FIXME: add shared ints,mask,unmask,probing.... */
	191
	192	#define IRQ_INPROGRESS 1
	193	/static unsigned short saved_mask;/
	194	//static int do_tint=0;
	195
	196	#define DEBUG_Q40INT
	197	/#define IP_USE_DISABLE //* would be nice, but crashes ???? */
	198
	199	static int mext_disabled=0; /* ext irq disabled by master chip? */
	200	static int aliased_irq=0; /* how many times inside handler ?*/
	201
	202
77dda339 RZ	203	/* got interrupt, dispatch to ISA or keyboard/timer IRQs */
77dda339 RZ	204	static void q40_irq_handler(unsigned int irq, struct pt_regs *fp)
1da177e4	205	{
77dda339 RZ	206	unsigned mir, mer;
77dda339 RZ	207	int i;
1da177e4 LT	208
1da177e4 LT	209	//repeat:
77dda339 RZ	210	mir = master_inb(IIRQ_REG);
	211	#ifdef CONFIG_BLK_DEV_FD
	212	if ((mir & Q40_IRQ_EXT_MASK) &&
	213	(master_inb(EIRQ_REG) & Q40_IRQ6_MASK)) {
	214	floppy_hardint();
	215	return;
	216	}
	217	#endif
	218	switch (irq) {
	219	case 4:
	220	case 6:
2850bc27	221	__m68k_handle_int(Q40_IRQ_SAMPLE, fp);
77dda339 RZ	222	return;
	223	}
	224	if (mir & Q40_IRQ_FRAME_MASK) {
2850bc27	225	__m68k_handle_int(Q40_IRQ_FRAME, fp);
77dda339 RZ	226	master_outb(-1, FRAME_CLEAR_REG);
	227	}
	228	if ((mir & Q40_IRQ_SER_MASK) \|\| (mir & Q40_IRQ_EXT_MASK)) {
	229	mer = master_inb(EIRQ_REG);
	230	for (i = 0; eirqs[i].mask; i++) {
	231	if (mer & eirqs[i].mask) {
	232	irq = eirqs[i].irq;
1da177e4 LT	233	/*
	234	* There is a little mess wrt which IRQ really caused this irq request. The
	235	* main problem is that IIRQ_REG and EIRQ_REG reflect the state when they
	236	* are read - which is long after the request came in. In theory IRQs should
	237	* not just go away but they occassionally do
	238	*/
77dda339 RZ	239	if (irq > 4 && irq <= 15 && mext_disabled) {
	240	/aliased_irq++;/
	241	goto iirq;
	242	}
	243	if (q40_state[irq] & IRQ_INPROGRESS) {
	244	/* some handlers do local_irq_enable() for irq latency reasons, */
	245	/* however reentering an active irq handler is not permitted */
1da177e4	246	#ifdef IP_USE_DISABLE
77dda339 RZ	247	/* in theory this is the better way to do it because it still */
	248	/* lets through eg the serial irqs, unfortunately it crashes */
	249	disable_irq(irq);
	250	disabled = 1;
1da177e4	251	#else
77dda339 RZ	252	/*printk("IRQ_INPROGRESS detected for irq %d, disabling - %s disabled\n",
	253	irq, disabled ? "already" : "not yet"); */
	254	fp->sr = (((fp->sr) & (~0x700))+0x200);
	255	disabled = 1;
1da177e4	256	#endif
77dda339 RZ	257	goto iirq;
	258	}
	259	q40_state[irq] \|= IRQ_INPROGRESS;
2850bc27	260	__m68k_handle_int(irq, fp);
77dda339 RZ	261	q40_state[irq] &= ~IRQ_INPROGRESS;
	262
	263	/* naively enable everything, if that fails than */
	264	/* this function will be reentered immediately thus */
	265	/* getting another chance to disable the IRQ */
	266
	267	if (disabled) {
1da177e4	268	#ifdef IP_USE_DISABLE
77dda339 RZ	269	if (irq > 4) {
	270	disabled = 0;
	271	enable_irq(irq);
	272	}
1da177e4	273	#else
77dda339 RZ	274	disabled = 0;
77dda339 RZ	275	/printk("reenabling irq %d\n", irq); /
1da177e4	276	#endif
77dda339	277	}
1da177e4	278	// used to do 'goto repeat;' here, this delayed bh processing too long
77dda339 RZ	279	return;
	280	}
	281	}
	282	if (mer && ccleirq > 0 && !aliased_irq) {
	283	printk("ISA interrupt from unknown source? EIRQ_REG = %x\n",mer);
	284	ccleirq--;
	285	}
1da177e4	286	}
77dda339 RZ	287	iirq:
	288	mir = master_inb(IIRQ_REG);
	289	/* should test whether keyboard irq is really enabled, doing it in defhand */
	290	if (mir & Q40_IRQ_KEYB_MASK)
2850bc27	291	__m68k_handle_int(Q40_IRQ_KEYBOARD, fp);
1da177e4	292
77dda339	293	return;
1da177e4	294	}
1da177e4	295
77dda339	296	void q40_enable_irq(unsigned int irq)
1da177e4	297	{
77dda339 RZ	298	if (irq >= 5 && irq <= 15) {
	299	mext_disabled--;
	300	if (mext_disabled > 0)
	301	printk("q40_enable_irq : nested disable/enable\n");
	302	if (mext_disabled == 0)
	303	master_outb(1, EXT_ENABLE_REG);
	304	}
1da177e4 LT	305	}
	306
	307
77dda339	308	void q40_disable_irq(unsigned int irq)
1da177e4	309	{
77dda339 RZ	310	/* disable ISA iqs : only do something if the driver has been
	311	* verified to be Q40 "compatible" - right now IDE, NE2K
	312	* Any driver should not attempt to sleep across disable_irq !!
	313	*/
	314
	315	if (irq >= 5 && irq <= 15) {
	316	master_outb(0, EXT_ENABLE_REG);
	317	mext_disabled++;
	318	if (mext_disabled > 1)
	319	printk("disable_irq nesting count %d\n",mext_disabled);
	320	}
1da177e4 LT	321	}
1da177e4 LT	322
77dda339	323	unsigned long q40_probe_irq_on(void)
1da177e4	324	{
77dda339 RZ	325	printk("irq probing not working - reconfigure the driver to avoid this\n");
77dda339 RZ	326	return -1;
1da177e4	327	}
77dda339	328	int q40_probe_irq_off(unsigned long irqs)
1da177e4	329	{
77dda339	330	return -1;
1da177e4	331	}