[deliverable/linux.git] / drivers / atm / suni.c

/*
 * drivers/atm/suni.c - S/UNI PHY driver
 *
 * Supports the following:
 * 	PMC PM5346 S/UNI LITE
 * 	PMC PM5350 S/UNI 155 ULTRA
 * 	PMC PM5355 S/UNI 622
 */
 
/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */

#include <linux/module.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/errno.h>
#include <linux/atmdev.h>
#include <linux/sonet.h>
#include <linux/delay.h>
#include <linux/timer.h>
#include <linux/init.h>
#include <linux/capability.h>
#include <linux/atm_suni.h>
#include <linux/slab.h>
#include <asm/system.h>
#include <asm/param.h>
#include <asm/uaccess.h>
#include <asm/atomic.h>

#include "suni.h"


#if 0
#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
#else
#define DPRINTK(format,args...)
#endif

#define PRIV(dev) ((struct suni_priv *) dev->phy_data)

#define PUT(val,reg) dev->ops->phy_put(dev,val,SUNI_##reg)
#define GET(reg) dev->ops->phy_get(dev,SUNI_##reg)
#define REG_CHANGE(mask,shift,value,reg) \
  PUT((GET(reg) & ~(mask)) | ((value) << (shift)),reg)


static struct timer_list poll_timer;
static struct suni_priv *sunis = NULL;
static DEFINE_SPINLOCK(sunis_lock);


#define ADD_LIMITED(s,v) \
    atomic_add((v),&stats->s); \
    if (atomic_read(&stats->s) < 0) atomic_set(&stats->s,INT_MAX);


static void suni_hz(unsigned long from_timer)
{
	struct suni_priv *walk;
	struct atm_dev *dev;
	struct k_sonet_stats *stats;

	for (walk = sunis; walk; walk = walk->next) {
		dev = walk->dev;
		stats = &walk->sonet_stats;
		PUT(0,MRI); /* latch counters */
		udelay(1);
		ADD_LIMITED(section_bip,(GET(RSOP_SBL) & 0xff) |
		    ((GET(RSOP_SBM) & 0xff) << 8));
		ADD_LIMITED(line_bip,(GET(RLOP_LBL) & 0xff) |
		    ((GET(RLOP_LB) & 0xff) << 8) |
		    ((GET(RLOP_LBM) & 0xf) << 16));
		ADD_LIMITED(path_bip,(GET(RPOP_PBL) & 0xff) |
		    ((GET(RPOP_PBM) & 0xff) << 8));
		ADD_LIMITED(line_febe,(GET(RLOP_LFL) & 0xff) |
		    ((GET(RLOP_LF) & 0xff) << 8) |
		    ((GET(RLOP_LFM) & 0xf) << 16));
		ADD_LIMITED(path_febe,(GET(RPOP_PFL) & 0xff) |
		    ((GET(RPOP_PFM) & 0xff) << 8));
		ADD_LIMITED(corr_hcs,GET(RACP_CHEC) & 0xff);
		ADD_LIMITED(uncorr_hcs,GET(RACP_UHEC) & 0xff);
		ADD_LIMITED(rx_cells,(GET(RACP_RCCL) & 0xff) |
		    ((GET(RACP_RCC) & 0xff) << 8) |
		    ((GET(RACP_RCCM) & 7) << 16));
		ADD_LIMITED(tx_cells,(GET(TACP_TCCL) & 0xff) |
		    ((GET(TACP_TCC) & 0xff) << 8) |
		    ((GET(TACP_TCCM) & 7) << 16));
	}
	if (from_timer) mod_timer(&poll_timer,jiffies+HZ);
}


#undef ADD_LIMITED


static int fetch_stats(struct atm_dev *dev,struct sonet_stats __user *arg,int zero)
{
	struct sonet_stats tmp;
	int error = 0;

	sonet_copy_stats(&PRIV(dev)->sonet_stats,&tmp);
	if (arg) error = copy_to_user(arg,&tmp,sizeof(tmp));
	if (zero && !error) sonet_subtract_stats(&PRIV(dev)->sonet_stats,&tmp);
	return error ? -EFAULT : 0;
}


#define HANDLE_FLAG(flag,reg,bit) \
  if (todo & flag) { \
    if (set) PUT(GET(reg) | bit,reg); \
    else PUT(GET(reg) & ~bit,reg); \
    todo &= ~flag; \
  }


static int change_diag(struct atm_dev *dev,void __user *arg,int set)
{
	int todo;

	if (get_user(todo,(int __user *)arg)) return -EFAULT;
	HANDLE_FLAG(SONET_INS_SBIP,TSOP_DIAG,SUNI_TSOP_DIAG_DBIP8);
	HANDLE_FLAG(SONET_INS_LBIP,TLOP_DIAG,SUNI_TLOP_DIAG_DBIP);
	HANDLE_FLAG(SONET_INS_PBIP,TPOP_CD,SUNI_TPOP_DIAG_DB3);
	HANDLE_FLAG(SONET_INS_FRAME,RSOP_CIE,SUNI_RSOP_CIE_FOOF);
	HANDLE_FLAG(SONET_INS_LAIS,TSOP_CTRL,SUNI_TSOP_CTRL_LAIS);
	HANDLE_FLAG(SONET_INS_PAIS,TPOP_CD,SUNI_TPOP_DIAG_PAIS);
	HANDLE_FLAG(SONET_INS_LOS,TSOP_DIAG,SUNI_TSOP_DIAG_DLOS);
	HANDLE_FLAG(SONET_INS_HCS,TACP_CS,SUNI_TACP_CS_DHCS);
	return put_user(todo,(int __user *)arg) ? -EFAULT : 0;
}


#undef HANDLE_FLAG


static int get_diag(struct atm_dev *dev,void __user *arg)
{
	int set;

	set = 0;
	if (GET(TSOP_DIAG) & SUNI_TSOP_DIAG_DBIP8) set |= SONET_INS_SBIP;
	if (GET(TLOP_DIAG) & SUNI_TLOP_DIAG_DBIP) set |= SONET_INS_LBIP;
	if (GET(TPOP_CD) & SUNI_TPOP_DIAG_DB3) set |= SONET_INS_PBIP;
	/* SONET_INS_FRAME is one-shot only */
	if (GET(TSOP_CTRL) & SUNI_TSOP_CTRL_LAIS) set |= SONET_INS_LAIS;
	if (GET(TPOP_CD) & SUNI_TPOP_DIAG_PAIS) set |= SONET_INS_PAIS;
	if (GET(TSOP_DIAG) & SUNI_TSOP_DIAG_DLOS) set |= SONET_INS_LOS;
	if (GET(TACP_CS) & SUNI_TACP_CS_DHCS) set |= SONET_INS_HCS;
	return put_user(set,(int __user *)arg) ? -EFAULT : 0;
}


static int set_loopback(struct atm_dev *dev,int mode)
{
	unsigned char control;
	int reg, dle, lle;

	if (PRIV(dev)->type == SUNI_MRI_TYPE_PM5355) {
		reg = SUNI_MCM;
		dle = SUNI_MCM_DLE;
		lle = SUNI_MCM_LLE;
	} else {
		reg = SUNI_MCT;
		dle = SUNI_MCT_DLE;
		lle = SUNI_MCT_LLE;
	}

	control = dev->ops->phy_get(dev, reg) & ~(dle | lle);
	switch (mode) {
		case ATM_LM_NONE:
			break;
		case ATM_LM_LOC_PHY:
			control |= dle;
			break;
		case ATM_LM_RMT_PHY:
			control |= lle;
			break;
		default:
			return -EINVAL;
	}
	 dev->ops->phy_put(dev, control, reg);
	PRIV(dev)->loop_mode = mode;
	return 0;
}

/*
 * SONET vs. SDH Configuration
 *
 * Z0INS (register 0x06): 0 for SONET, 1 for SDH
 * ENSS (register 0x3D): 0 for SONET, 1 for SDH
 * LEN16 (register 0x28): 0 for SONET, 1 for SDH (n/a for S/UNI 155 QUAD)
 * LEN16 (register 0x50): 0 for SONET, 1 for SDH (n/a for S/UNI 155 QUAD)
 * S[1:0] (register 0x46): 00 for SONET, 10 for SDH
 */

static int set_sonet(struct atm_dev *dev)
{
	if (PRIV(dev)->type == SUNI_MRI_TYPE_PM5355) {
		PUT(GET(RPOP_RC) & ~SUNI_RPOP_RC_ENSS, RPOP_RC);
		PUT(GET(SSTB_CTRL) & ~SUNI_SSTB_CTRL_LEN16, SSTB_CTRL);
		PUT(GET(SPTB_CTRL) & ~SUNI_SPTB_CTRL_LEN16, SPTB_CTRL);
	}

	REG_CHANGE(SUNI_TPOP_APM_S, SUNI_TPOP_APM_S_SHIFT,
		   SUNI_TPOP_S_SONET, TPOP_APM);

	return 0;
}

static int set_sdh(struct atm_dev *dev)
{
	if (PRIV(dev)->type == SUNI_MRI_TYPE_PM5355) {
		PUT(GET(RPOP_RC) | SUNI_RPOP_RC_ENSS, RPOP_RC);
		PUT(GET(SSTB_CTRL) | SUNI_SSTB_CTRL_LEN16, SSTB_CTRL);
		PUT(GET(SPTB_CTRL) | SUNI_SPTB_CTRL_LEN16, SPTB_CTRL);
	}

	REG_CHANGE(SUNI_TPOP_APM_S, SUNI_TPOP_APM_S_SHIFT,
		   SUNI_TPOP_S_SDH, TPOP_APM);

	return 0;
}


static int get_framing(struct atm_dev *dev, void __user *arg)
{
	int framing;
	unsigned char s;


	s = (GET(TPOP_APM) & SUNI_TPOP_APM_S) >> SUNI_TPOP_APM_S_SHIFT;
	if (s == SUNI_TPOP_S_SONET)
		framing = SONET_FRAME_SONET;
	else
		framing = SONET_FRAME_SDH;

	return put_user(framing, (int __user *) arg) ? -EFAULT : 0;
}

static int set_framing(struct atm_dev *dev, void __user *arg)
{
	int mode;

	if (get_user(mode, (int __user *) arg))
		return -EFAULT;

	if (mode == SONET_FRAME_SONET)
		return set_sonet(dev);
	else if (mode == SONET_FRAME_SDH)
		return set_sdh(dev);

	return -EINVAL;
}


static int suni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
{
	switch (cmd) {
		case SONET_GETSTATZ:
		case SONET_GETSTAT:
			return fetch_stats(dev, arg, cmd == SONET_GETSTATZ);
		case SONET_SETDIAG:
			return change_diag(dev,arg,1);
		case SONET_CLRDIAG:
			return change_diag(dev,arg,0);
		case SONET_GETDIAG:
			return get_diag(dev,arg);
		case SONET_SETFRAMING:
			if (!capable(CAP_NET_ADMIN))
				return -EPERM;
			return set_framing(dev, arg);
		case SONET_GETFRAMING:
			return get_framing(dev, arg);
		case SONET_GETFRSENSE:
			return -EINVAL;
		case ATM_SETLOOP:
			if (!capable(CAP_NET_ADMIN))
				return -EPERM;
			return set_loopback(dev,(int)(unsigned long)arg);
		case ATM_GETLOOP:
			return put_user(PRIV(dev)->loop_mode,(int __user *)arg) ?
			    -EFAULT : 0;
		case ATM_QUERYLOOP:
			return put_user(ATM_LM_LOC_PHY | ATM_LM_RMT_PHY,
			    (int __user *) arg) ? -EFAULT : 0;
		default:
			return -ENOIOCTLCMD;
	}
}


static void poll_los(struct atm_dev *dev)
{
	atm_dev_signal_change(dev,
		GET(RSOP_SIS) & SUNI_RSOP_SIS_LOSV ?
		ATM_PHY_SIG_LOST : ATM_PHY_SIG_FOUND);
}


static void suni_int(struct atm_dev *dev)
{
	poll_los(dev);
	printk(KERN_NOTICE "%s(itf %d): signal %s\n",dev->type,dev->number,
	    dev->signal == ATM_PHY_SIG_LOST ?  "lost" : "detected again");
}


static int suni_start(struct atm_dev *dev)
{
	unsigned long flags;
	int first;

	spin_lock_irqsave(&sunis_lock,flags);
	first = !sunis;
	PRIV(dev)->next = sunis;
	sunis = PRIV(dev);
	spin_unlock_irqrestore(&sunis_lock,flags);
	memset(&PRIV(dev)->sonet_stats,0,sizeof(struct k_sonet_stats));
	PUT(GET(RSOP_CIE) | SUNI_RSOP_CIE_LOSE,RSOP_CIE);
		/* interrupt on loss of signal */
	poll_los(dev); /* ... and clear SUNI interrupts */
	if (dev->signal == ATM_PHY_SIG_LOST)
		printk(KERN_WARNING "%s(itf %d): no signal\n",dev->type,
		    dev->number);
	PRIV(dev)->loop_mode = ATM_LM_NONE;
	suni_hz(0); /* clear SUNI counters */
	(void) fetch_stats(dev,NULL,1); /* clear kernel counters */
	if (first) {
		init_timer(&poll_timer);
		poll_timer.expires = jiffies+HZ;
		poll_timer.function = suni_hz;
		poll_timer.data = 1;
#if 0
printk(KERN_DEBUG "[u] p=0x%lx,n=0x%lx\n",(unsigned long) poll_timer.list.prev,
    (unsigned long) poll_timer.list.next);
#endif
		add_timer(&poll_timer);
	}
	return 0;
}


static int suni_stop(struct atm_dev *dev)
{
	struct suni_priv **walk;
	unsigned long flags;

	/* let SAR driver worry about stopping interrupts */
	spin_lock_irqsave(&sunis_lock,flags);
	for (walk = &sunis; *walk != PRIV(dev);
	    walk = &PRIV((*walk)->dev)->next);
	*walk = PRIV((*walk)->dev)->next;
	if (!sunis) del_timer_sync(&poll_timer);
	spin_unlock_irqrestore(&sunis_lock,flags);
	kfree(PRIV(dev));

	return 0;
}


static const struct atmphy_ops suni_ops = {
	.start		= suni_start,
	.ioctl		= suni_ioctl,
	.interrupt	= suni_int,
	.stop		= suni_stop,
};


int suni_init(struct atm_dev *dev)
{
	unsigned char mri;

	if (!(dev->phy_data = kmalloc(sizeof(struct suni_priv),GFP_KERNEL)))
		return -ENOMEM;
	PRIV(dev)->dev = dev;

	mri = GET(MRI); /* reset SUNI */
	PRIV(dev)->type = (mri & SUNI_MRI_TYPE) >> SUNI_MRI_TYPE_SHIFT;
	PUT(mri | SUNI_MRI_RESET,MRI);
	PUT(mri,MRI);
	PUT((GET(MT) & SUNI_MT_DS27_53),MT); /* disable all tests */
        set_sonet(dev);
	REG_CHANGE(SUNI_TACP_IUCHP_CLP,0,SUNI_TACP_IUCHP_CLP,
	    TACP_IUCHP); /* idle cells */
	PUT(SUNI_IDLE_PATTERN,TACP_IUCPOP);
	dev->phy = &suni_ops;

	return 0;
}

EXPORT_SYMBOL(suni_init);

MODULE_LICENSE("GPL");
Commit	Line	Data
df3bc8bd CW	1	/*
	2	* drivers/atm/suni.c - S/UNI PHY driver
	3	*
	4	* Supports the following:
	5	* PMC PM5346 S/UNI LITE
	6	* PMC PM5350 S/UNI 155 ULTRA
	7	* PMC PM5355 S/UNI 622
	8	*/
1da177e4 LT	9
	10	/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
	11
1da177e4 LT	12	#include <linux/module.h>
	13	#include <linux/jiffies.h>
	14	#include <linux/kernel.h>
	15	#include <linux/mm.h>
	16	#include <linux/errno.h>
	17	#include <linux/atmdev.h>
	18	#include <linux/sonet.h>
	19	#include <linux/delay.h>
	20	#include <linux/timer.h>
	21	#include <linux/init.h>
	22	#include <linux/capability.h>
	23	#include <linux/atm_suni.h>
5a0e3ad6	24	#include <linux/slab.h>
1da177e4 LT	25	#include <asm/system.h>
	26	#include <asm/param.h>
	27	#include <asm/uaccess.h>
	28	#include <asm/atomic.h>
	29
	30	#include "suni.h"
	31
	32
	33	#if 0
	34	#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
	35	#else
	36	#define DPRINTK(format,args...)
	37	#endif
	38
1da177e4 LT	39	#define PRIV(dev) ((struct suni_priv *) dev->phy_data)
	40
	41	#define PUT(val,reg) dev->ops->phy_put(dev,val,SUNI_##reg)
	42	#define GET(reg) dev->ops->phy_get(dev,SUNI_##reg)
	43	#define REG_CHANGE(mask,shift,value,reg) \
	44	PUT((GET(reg) & ~(mask)) \| ((value) << (shift)),reg)
	45
	46
	47	static struct timer_list poll_timer;
	48	static struct suni_priv *sunis = NULL;
	49	static DEFINE_SPINLOCK(sunis_lock);
	50
	51
	52	#define ADD_LIMITED(s,v) \
	53	atomic_add((v),&stats->s); \
	54	if (atomic_read(&stats->s) < 0) atomic_set(&stats->s,INT_MAX);
	55
	56
	57	static void suni_hz(unsigned long from_timer)
	58	{
	59	struct suni_priv *walk;
	60	struct atm_dev *dev;
	61	struct k_sonet_stats *stats;
	62
	63	for (walk = sunis; walk; walk = walk->next) {
	64	dev = walk->dev;
	65	stats = &walk->sonet_stats;
	66	PUT(0,MRI); /* latch counters */
	67	udelay(1);
	68	ADD_LIMITED(section_bip,(GET(RSOP_SBL) & 0xff) \|
	69	((GET(RSOP_SBM) & 0xff) << 8));
	70	ADD_LIMITED(line_bip,(GET(RLOP_LBL) & 0xff) \|
	71	((GET(RLOP_LB) & 0xff) << 8) \|
	72	((GET(RLOP_LBM) & 0xf) << 16));
	73	ADD_LIMITED(path_bip,(GET(RPOP_PBL) & 0xff) \|
	74	((GET(RPOP_PBM) & 0xff) << 8));
	75	ADD_LIMITED(line_febe,(GET(RLOP_LFL) & 0xff) \|
	76	((GET(RLOP_LF) & 0xff) << 8) \|
	77	((GET(RLOP_LFM) & 0xf) << 16));
	78	ADD_LIMITED(path_febe,(GET(RPOP_PFL) & 0xff) \|
	79	((GET(RPOP_PFM) & 0xff) << 8));
	80	ADD_LIMITED(corr_hcs,GET(RACP_CHEC) & 0xff);
	81	ADD_LIMITED(uncorr_hcs,GET(RACP_UHEC) & 0xff);
	82	ADD_LIMITED(rx_cells,(GET(RACP_RCCL) & 0xff) \|
	83	((GET(RACP_RCC) & 0xff) << 8) \|
	84	((GET(RACP_RCCM) & 7) << 16));
	85	ADD_LIMITED(tx_cells,(GET(TACP_TCCL) & 0xff) \|
	86	((GET(TACP_TCC) & 0xff) << 8) \|
	87	((GET(TACP_TCCM) & 7) << 16));
	88	}
	89	if (from_timer) mod_timer(&poll_timer,jiffies+HZ);
	90	}
	91
	92
	93	#undef ADD_LIMITED
	94
	95
	96	static int fetch_stats(struct atm_dev dev,struct sonet_stats __user arg,int zero)
	97	{
	98	struct sonet_stats tmp;
	99	int error = 0;
	100
	101	sonet_copy_stats(&PRIV(dev)->sonet_stats,&tmp);
	102	if (arg) error = copy_to_user(arg,&tmp,sizeof(tmp));
103	if (zero && !error) sonet_subtract_stats(&PRIV(dev)->sonet_stats,&tmp);
104	return error ? -EFAULT : 0;
105	}
106
107
108	#define HANDLE_FLAG(flag,reg,bit) \
109	if (todo & flag) { \
110	if (set) PUT(GET(reg) \| bit,reg); \
111	else PUT(GET(reg) & ~bit,reg); \
112	todo &= ~flag; \
113	}
114
115
116	static int change_diag(struct atm_dev dev,void __user arg,int set)
117	{
118	int todo;
119
120	if (get_user(todo,(int __user *)arg)) return -EFAULT;
121	HANDLE_FLAG(SONET_INS_SBIP,TSOP_DIAG,SUNI_TSOP_DIAG_DBIP8);
122	HANDLE_FLAG(SONET_INS_LBIP,TLOP_DIAG,SUNI_TLOP_DIAG_DBIP);
123	HANDLE_FLAG(SONET_INS_PBIP,TPOP_CD,SUNI_TPOP_DIAG_DB3);
124	HANDLE_FLAG(SONET_INS_FRAME,RSOP_CIE,SUNI_RSOP_CIE_FOOF);
125	HANDLE_FLAG(SONET_INS_LAIS,TSOP_CTRL,SUNI_TSOP_CTRL_LAIS);
126	HANDLE_FLAG(SONET_INS_PAIS,TPOP_CD,SUNI_TPOP_DIAG_PAIS);
127	HANDLE_FLAG(SONET_INS_LOS,TSOP_DIAG,SUNI_TSOP_DIAG_DLOS);
128	HANDLE_FLAG(SONET_INS_HCS,TACP_CS,SUNI_TACP_CS_DHCS);
129	return put_user(todo,(int __user *)arg) ? -EFAULT : 0;
130	}
131
132
133	#undef HANDLE_FLAG
134
135
136	static int get_diag(struct atm_dev dev,void __user arg)
137	{
138	int set;
139
140	set = 0;
141	if (GET(TSOP_DIAG) & SUNI_TSOP_DIAG_DBIP8) set \|= SONET_INS_SBIP;
142	if (GET(TLOP_DIAG) & SUNI_TLOP_DIAG_DBIP) set \|= SONET_INS_LBIP;
143	if (GET(TPOP_CD) & SUNI_TPOP_DIAG_DB3) set \|= SONET_INS_PBIP;
144	/* SONET_INS_FRAME is one-shot only */
145	if (GET(TSOP_CTRL) & SUNI_TSOP_CTRL_LAIS) set \|= SONET_INS_LAIS;
146	if (GET(TPOP_CD) & SUNI_TPOP_DIAG_PAIS) set \|= SONET_INS_PAIS;
147	if (GET(TSOP_DIAG) & SUNI_TSOP_DIAG_DLOS) set \|= SONET_INS_LOS;
148	if (GET(TACP_CS) & SUNI_TACP_CS_DHCS) set \|= SONET_INS_HCS;
149	return put_user(set,(int __user *)arg) ? -EFAULT : 0;
150	}
151
152
153	static int set_loopback(struct atm_dev *dev,int mode)
154	{
155	unsigned char control;
df3bc8bd CW	156	int reg, dle, lle;
	157
	158	if (PRIV(dev)->type == SUNI_MRI_TYPE_PM5355) {
	159	reg = SUNI_MCM;
	160	dle = SUNI_MCM_DLE;
	161	lle = SUNI_MCM_LLE;
	162	} else {
	163	reg = SUNI_MCT;
	164	dle = SUNI_MCT_DLE;
	165	lle = SUNI_MCT_LLE;
	166	}
1da177e4	167
df3bc8bd	168	control = dev->ops->phy_get(dev, reg) & ~(dle \| lle);
1da177e4 LT	169	switch (mode) {
	170	case ATM_LM_NONE:
	171	break;
	172	case ATM_LM_LOC_PHY:
df3bc8bd	173	control \|= dle;
1da177e4 LT	174	break;
1da177e4 LT	175	case ATM_LM_RMT_PHY:
df3bc8bd	176	control \|= lle;
1da177e4 LT	177	break;
	178	default:
	179	return -EINVAL;
	180	}
df3bc8bd	181	dev->ops->phy_put(dev, control, reg);
1da177e4 LT	182	PRIV(dev)->loop_mode = mode;
	183	return 0;
	184	}
	185
df3bc8bd CW	186	/*
	187	* SONET vs. SDH Configuration
	188	*
	189	* Z0INS (register 0x06): 0 for SONET, 1 for SDH
	190	* ENSS (register 0x3D): 0 for SONET, 1 for SDH
	191	* LEN16 (register 0x28): 0 for SONET, 1 for SDH (n/a for S/UNI 155 QUAD)
	192	* LEN16 (register 0x50): 0 for SONET, 1 for SDH (n/a for S/UNI 155 QUAD)
	193	* S[1:0] (register 0x46): 00 for SONET, 10 for SDH
	194	*/
	195
	196	static int set_sonet(struct atm_dev *dev)
	197	{
	198	if (PRIV(dev)->type == SUNI_MRI_TYPE_PM5355) {
	199	PUT(GET(RPOP_RC) & ~SUNI_RPOP_RC_ENSS, RPOP_RC);
	200	PUT(GET(SSTB_CTRL) & ~SUNI_SSTB_CTRL_LEN16, SSTB_CTRL);
	201	PUT(GET(SPTB_CTRL) & ~SUNI_SPTB_CTRL_LEN16, SPTB_CTRL);
	202	}
	203
	204	REG_CHANGE(SUNI_TPOP_APM_S, SUNI_TPOP_APM_S_SHIFT,
	205	SUNI_TPOP_S_SONET, TPOP_APM);
	206
	207	return 0;
	208	}
	209
	210	static int set_sdh(struct atm_dev *dev)
	211	{
	212	if (PRIV(dev)->type == SUNI_MRI_TYPE_PM5355) {
	213	PUT(GET(RPOP_RC) \| SUNI_RPOP_RC_ENSS, RPOP_RC);
	214	PUT(GET(SSTB_CTRL) \| SUNI_SSTB_CTRL_LEN16, SSTB_CTRL);
	215	PUT(GET(SPTB_CTRL) \| SUNI_SPTB_CTRL_LEN16, SPTB_CTRL);
	216	}
	217
	218	REG_CHANGE(SUNI_TPOP_APM_S, SUNI_TPOP_APM_S_SHIFT,
	219	SUNI_TPOP_S_SDH, TPOP_APM);
	220
	221	return 0;
	222	}
	223
	224
	225	static int get_framing(struct atm_dev dev, void __user arg)
	226	{
	227	int framing;
	228	unsigned char s;
	229
	230
	231	s = (GET(TPOP_APM) & SUNI_TPOP_APM_S) >> SUNI_TPOP_APM_S_SHIFT;
	232	if (s == SUNI_TPOP_S_SONET)
	233	framing = SONET_FRAME_SONET;
	234	else
	235	framing = SONET_FRAME_SDH;
	236
	237	return put_user(framing, (int __user *) arg) ? -EFAULT : 0;
	238	}
	239
	240	static int set_framing(struct atm_dev dev, void __user arg)
	241	{
	242	int mode;
	243
	244	if (get_user(mode, (int __user *) arg))
	245	return -EFAULT;
	246
	247	if (mode == SONET_FRAME_SONET)
	248	return set_sonet(dev);
	249	else if (mode == SONET_FRAME_SDH)
250	return set_sdh(dev);
251
252	return -EINVAL;
253	}
254
1da177e4 LT	255
	256	static int suni_ioctl(struct atm_dev dev,unsigned int cmd,void __user arg)
	257	{
	258	switch (cmd) {
	259	case SONET_GETSTATZ:
	260	case SONET_GETSTAT:
	261	return fetch_stats(dev, arg, cmd == SONET_GETSTATZ);
	262	case SONET_SETDIAG:
	263	return change_diag(dev,arg,1);
	264	case SONET_CLRDIAG:
	265	return change_diag(dev,arg,0);
	266	case SONET_GETDIAG:
	267	return get_diag(dev,arg);
	268	case SONET_SETFRAMING:
df3bc8bd CW	269	if (!capable(CAP_NET_ADMIN))
	270	return -EPERM;
	271	return set_framing(dev, arg);
1da177e4	272	case SONET_GETFRAMING:
df3bc8bd	273	return get_framing(dev, arg);
1da177e4 LT	274	case SONET_GETFRSENSE:
	275	return -EINVAL;
	276	case ATM_SETLOOP:
df3bc8bd CW	277	if (!capable(CAP_NET_ADMIN))
df3bc8bd CW	278	return -EPERM;
1da177e4 LT	279	return set_loopback(dev,(int)(unsigned long)arg);
	280	case ATM_GETLOOP:
	281	return put_user(PRIV(dev)->loop_mode,(int __user *)arg) ?
	282	-EFAULT : 0;
	283	case ATM_QUERYLOOP:
	284	return put_user(ATM_LM_LOC_PHY \| ATM_LM_RMT_PHY,
	285	(int __user *) arg) ? -EFAULT : 0;
	286	default:
	287	return -ENOIOCTLCMD;
	288	}
	289	}
	290
	291
	292	static void poll_los(struct atm_dev *dev)
	293	{
e0b901a9 KH	294	atm_dev_signal_change(dev,
	295	GET(RSOP_SIS) & SUNI_RSOP_SIS_LOSV ?
	296	ATM_PHY_SIG_LOST : ATM_PHY_SIG_FOUND);
1da177e4 LT	297	}
	298
	299
	300	static void suni_int(struct atm_dev *dev)
	301	{
	302	poll_los(dev);
	303	printk(KERN_NOTICE "%s(itf %d): signal %s\n",dev->type,dev->number,
	304	dev->signal == ATM_PHY_SIG_LOST ? "lost" : "detected again");
	305	}
	306
	307
	308	static int suni_start(struct atm_dev *dev)
	309	{
	310	unsigned long flags;
	311	int first;
	312
1da177e4 LT	313	spin_lock_irqsave(&sunis_lock,flags);
	314	first = !sunis;
	315	PRIV(dev)->next = sunis;
	316	sunis = PRIV(dev);
	317	spin_unlock_irqrestore(&sunis_lock,flags);
	318	memset(&PRIV(dev)->sonet_stats,0,sizeof(struct k_sonet_stats));
	319	PUT(GET(RSOP_CIE) \| SUNI_RSOP_CIE_LOSE,RSOP_CIE);
	320	/* interrupt on loss of signal */
	321	poll_los(dev); /* ... and clear SUNI interrupts */
	322	if (dev->signal == ATM_PHY_SIG_LOST)
	323	printk(KERN_WARNING "%s(itf %d): no signal\n",dev->type,
	324	dev->number);
	325	PRIV(dev)->loop_mode = ATM_LM_NONE;
	326	suni_hz(0); /* clear SUNI counters */
	327	(void) fetch_stats(dev,NULL,1); /* clear kernel counters */
	328	if (first) {
	329	init_timer(&poll_timer);
	330	poll_timer.expires = jiffies+HZ;
	331	poll_timer.function = suni_hz;
	332	poll_timer.data = 1;
	333	#if 0
	334	printk(KERN_DEBUG "[u] p=0x%lx,n=0x%lx\n",(unsigned long) poll_timer.list.prev,
	335	(unsigned long) poll_timer.list.next);
	336	#endif
	337	add_timer(&poll_timer);
	338	}
	339	return 0;
	340	}
	341
	342
	343	static int suni_stop(struct atm_dev *dev)
	344	{
	345	struct suni_priv **walk;
	346	unsigned long flags;
	347
	348	/* let SAR driver worry about stopping interrupts */
	349	spin_lock_irqsave(&sunis_lock,flags);
	350	for (walk = &sunis; *walk != PRIV(dev);
	351	walk = &PRIV((*walk)->dev)->next);
	352	walk = PRIV((walk)->dev)->next;
	353	if (!sunis) del_timer_sync(&poll_timer);
	354	spin_unlock_irqrestore(&sunis_lock,flags);
	355	kfree(PRIV(dev));
	356
	357	return 0;
	358	}
	359
	360
	361	static const struct atmphy_ops suni_ops = {
	362	.start = suni_start,
	363	.ioctl = suni_ioctl,
	364	.interrupt = suni_int,
	365	.stop = suni_stop,
	366	};
	367
	368
421c9914	369	int suni_init(struct atm_dev *dev)
1da177e4 LT	370	{
	371	unsigned char mri;
	372
df3bc8bd CW	373	if (!(dev->phy_data = kmalloc(sizeof(struct suni_priv),GFP_KERNEL)))
	374	return -ENOMEM;
	375	PRIV(dev)->dev = dev;
	376
1da177e4	377	mri = GET(MRI); /* reset SUNI */
df3bc8bd	378	PRIV(dev)->type = (mri & SUNI_MRI_TYPE) >> SUNI_MRI_TYPE_SHIFT;
1da177e4 LT	379	PUT(mri \| SUNI_MRI_RESET,MRI);
	380	PUT(mri,MRI);
	381	PUT((GET(MT) & SUNI_MT_DS27_53),MT); /* disable all tests */
df3bc8bd	382	set_sonet(dev);
1da177e4 LT	383	REG_CHANGE(SUNI_TACP_IUCHP_CLP,0,SUNI_TACP_IUCHP_CLP,
	384	TACP_IUCHP); /* idle cells */
	385	PUT(SUNI_IDLE_PATTERN,TACP_IUCPOP);
	386	dev->phy = &suni_ops;
df3bc8bd	387
1da177e4 LT	388	return 0;
	389	}
	390
	391	EXPORT_SYMBOL(suni_init);
	392
	393	MODULE_LICENSE("GPL");