1 /* drivers/atm/suni.c - PMC PM5346 SUNI (PHY) driver */
3 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
6 #include <linux/module.h>
7 #include <linux/jiffies.h>
8 #include <linux/kernel.h>
10 #include <linux/errno.h>
11 #include <linux/atmdev.h>
12 #include <linux/sonet.h>
13 #include <linux/delay.h>
14 #include <linux/timer.h>
15 #include <linux/init.h>
16 #include <linux/capability.h>
17 #include <linux/atm_suni.h>
18 #include <asm/system.h>
19 #include <asm/param.h>
20 #include <asm/uaccess.h>
21 #include <asm/atomic.h>
27 #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
29 #define DPRINTK(format,args...)
32 #define PRIV(dev) ((struct suni_priv *) dev->phy_data)
34 #define PUT(val,reg) dev->ops->phy_put(dev,val,SUNI_##reg)
35 #define GET(reg) dev->ops->phy_get(dev,SUNI_##reg)
36 #define REG_CHANGE(mask,shift,value,reg) \
37 PUT((GET(reg) & ~(mask)) | ((value) << (shift)),reg)
40 static struct timer_list poll_timer;
41 static struct suni_priv *sunis = NULL;
42 static DEFINE_SPINLOCK(sunis_lock);
45 #define ADD_LIMITED(s,v) \
46 atomic_add((v),&stats->s); \
47 if (atomic_read(&stats->s) < 0) atomic_set(&stats->s,INT_MAX);
50 static void suni_hz(unsigned long from_timer)
52 struct suni_priv *walk;
54 struct k_sonet_stats *stats;
56 for (walk = sunis; walk; walk = walk->next) {
58 stats = &walk->sonet_stats;
59 PUT(0,MRI); /* latch counters */
61 ADD_LIMITED(section_bip,(GET(RSOP_SBL) & 0xff) |
62 ((GET(RSOP_SBM) & 0xff) << 8));
63 ADD_LIMITED(line_bip,(GET(RLOP_LBL) & 0xff) |
64 ((GET(RLOP_LB) & 0xff) << 8) |
65 ((GET(RLOP_LBM) & 0xf) << 16));
66 ADD_LIMITED(path_bip,(GET(RPOP_PBL) & 0xff) |
67 ((GET(RPOP_PBM) & 0xff) << 8));
68 ADD_LIMITED(line_febe,(GET(RLOP_LFL) & 0xff) |
69 ((GET(RLOP_LF) & 0xff) << 8) |
70 ((GET(RLOP_LFM) & 0xf) << 16));
71 ADD_LIMITED(path_febe,(GET(RPOP_PFL) & 0xff) |
72 ((GET(RPOP_PFM) & 0xff) << 8));
73 ADD_LIMITED(corr_hcs,GET(RACP_CHEC) & 0xff);
74 ADD_LIMITED(uncorr_hcs,GET(RACP_UHEC) & 0xff);
75 ADD_LIMITED(rx_cells,(GET(RACP_RCCL) & 0xff) |
76 ((GET(RACP_RCC) & 0xff) << 8) |
77 ((GET(RACP_RCCM) & 7) << 16));
78 ADD_LIMITED(tx_cells,(GET(TACP_TCCL) & 0xff) |
79 ((GET(TACP_TCC) & 0xff) << 8) |
80 ((GET(TACP_TCCM) & 7) << 16));
82 if (from_timer) mod_timer(&poll_timer,jiffies+HZ);
89 static int fetch_stats(struct atm_dev *dev,struct sonet_stats __user *arg,int zero)
91 struct sonet_stats tmp;
94 sonet_copy_stats(&PRIV(dev)->sonet_stats,&tmp);
95 if (arg) error = copy_to_user(arg,&tmp,sizeof(tmp));
96 if (zero && !error) sonet_subtract_stats(&PRIV(dev)->sonet_stats,&tmp);
97 return error ? -EFAULT : 0;
101 #define HANDLE_FLAG(flag,reg,bit) \
103 if (set) PUT(GET(reg) | bit,reg); \
104 else PUT(GET(reg) & ~bit,reg); \
109 static int change_diag(struct atm_dev *dev,void __user *arg,int set)
113 if (get_user(todo,(int __user *)arg)) return -EFAULT;
114 HANDLE_FLAG(SONET_INS_SBIP,TSOP_DIAG,SUNI_TSOP_DIAG_DBIP8);
115 HANDLE_FLAG(SONET_INS_LBIP,TLOP_DIAG,SUNI_TLOP_DIAG_DBIP);
116 HANDLE_FLAG(SONET_INS_PBIP,TPOP_CD,SUNI_TPOP_DIAG_DB3);
117 HANDLE_FLAG(SONET_INS_FRAME,RSOP_CIE,SUNI_RSOP_CIE_FOOF);
118 HANDLE_FLAG(SONET_INS_LAIS,TSOP_CTRL,SUNI_TSOP_CTRL_LAIS);
119 HANDLE_FLAG(SONET_INS_PAIS,TPOP_CD,SUNI_TPOP_DIAG_PAIS);
120 HANDLE_FLAG(SONET_INS_LOS,TSOP_DIAG,SUNI_TSOP_DIAG_DLOS);
121 HANDLE_FLAG(SONET_INS_HCS,TACP_CS,SUNI_TACP_CS_DHCS);
122 return put_user(todo,(int __user *)arg) ? -EFAULT : 0;
129 static int get_diag(struct atm_dev *dev,void __user *arg)
134 if (GET(TSOP_DIAG) & SUNI_TSOP_DIAG_DBIP8) set |= SONET_INS_SBIP;
135 if (GET(TLOP_DIAG) & SUNI_TLOP_DIAG_DBIP) set |= SONET_INS_LBIP;
136 if (GET(TPOP_CD) & SUNI_TPOP_DIAG_DB3) set |= SONET_INS_PBIP;
137 /* SONET_INS_FRAME is one-shot only */
138 if (GET(TSOP_CTRL) & SUNI_TSOP_CTRL_LAIS) set |= SONET_INS_LAIS;
139 if (GET(TPOP_CD) & SUNI_TPOP_DIAG_PAIS) set |= SONET_INS_PAIS;
140 if (GET(TSOP_DIAG) & SUNI_TSOP_DIAG_DLOS) set |= SONET_INS_LOS;
141 if (GET(TACP_CS) & SUNI_TACP_CS_DHCS) set |= SONET_INS_HCS;
142 return put_user(set,(int __user *)arg) ? -EFAULT : 0;
146 static int set_loopback(struct atm_dev *dev,int mode)
148 unsigned char control;
150 control = GET(MCT) & ~(SUNI_MCT_DLE | SUNI_MCT_LLE);
155 control |= SUNI_MCT_DLE;
158 control |= SUNI_MCT_LLE;
164 PRIV(dev)->loop_mode = mode;
169 static int suni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
174 return fetch_stats(dev, arg, cmd == SONET_GETSTATZ);
176 return change_diag(dev,arg,1);
178 return change_diag(dev,arg,0);
180 return get_diag(dev,arg);
181 case SONET_SETFRAMING:
182 if ((int)(unsigned long)arg != SONET_FRAME_SONET) return -EINVAL;
184 case SONET_GETFRAMING:
185 return put_user(SONET_FRAME_SONET,(int __user *)arg) ?
187 case SONET_GETFRSENSE:
190 return set_loopback(dev,(int)(unsigned long)arg);
192 return put_user(PRIV(dev)->loop_mode,(int __user *)arg) ?
195 return put_user(ATM_LM_LOC_PHY | ATM_LM_RMT_PHY,
196 (int __user *) arg) ? -EFAULT : 0;
203 static void poll_los(struct atm_dev *dev)
205 dev->signal = GET(RSOP_SIS) & SUNI_RSOP_SIS_LOSV ? ATM_PHY_SIG_LOST :
210 static void suni_int(struct atm_dev *dev)
213 printk(KERN_NOTICE "%s(itf %d): signal %s\n",dev->type,dev->number,
214 dev->signal == ATM_PHY_SIG_LOST ? "lost" : "detected again");
218 static int suni_start(struct atm_dev *dev)
223 if (!(dev->phy_data = kmalloc(sizeof(struct suni_priv),GFP_KERNEL)))
226 PRIV(dev)->dev = dev;
227 spin_lock_irqsave(&sunis_lock,flags);
229 PRIV(dev)->next = sunis;
231 spin_unlock_irqrestore(&sunis_lock,flags);
232 memset(&PRIV(dev)->sonet_stats,0,sizeof(struct k_sonet_stats));
233 PUT(GET(RSOP_CIE) | SUNI_RSOP_CIE_LOSE,RSOP_CIE);
234 /* interrupt on loss of signal */
235 poll_los(dev); /* ... and clear SUNI interrupts */
236 if (dev->signal == ATM_PHY_SIG_LOST)
237 printk(KERN_WARNING "%s(itf %d): no signal\n",dev->type,
239 PRIV(dev)->loop_mode = ATM_LM_NONE;
240 suni_hz(0); /* clear SUNI counters */
241 (void) fetch_stats(dev,NULL,1); /* clear kernel counters */
243 init_timer(&poll_timer);
244 poll_timer.expires = jiffies+HZ;
245 poll_timer.function = suni_hz;
248 printk(KERN_DEBUG "[u] p=0x%lx,n=0x%lx\n",(unsigned long) poll_timer.list.prev,
249 (unsigned long) poll_timer.list.next);
251 add_timer(&poll_timer);
257 static int suni_stop(struct atm_dev *dev)
259 struct suni_priv **walk;
262 /* let SAR driver worry about stopping interrupts */
263 spin_lock_irqsave(&sunis_lock,flags);
264 for (walk = &sunis; *walk != PRIV(dev);
265 walk = &PRIV((*walk)->dev)->next);
266 *walk = PRIV((*walk)->dev)->next;
267 if (!sunis) del_timer_sync(&poll_timer);
268 spin_unlock_irqrestore(&sunis_lock,flags);
275 static const struct atmphy_ops suni_ops = {
278 .interrupt = suni_int,
283 int suni_init(struct atm_dev *dev)
287 mri = GET(MRI); /* reset SUNI */
288 PUT(mri | SUNI_MRI_RESET,MRI);
290 PUT((GET(MT) & SUNI_MT_DS27_53),MT); /* disable all tests */
291 REG_CHANGE(SUNI_TPOP_APM_S,SUNI_TPOP_APM_S_SHIFT,SUNI_TPOP_S_SONET,
292 TPOP_APM); /* use SONET */
293 REG_CHANGE(SUNI_TACP_IUCHP_CLP,0,SUNI_TACP_IUCHP_CLP,
294 TACP_IUCHP); /* idle cells */
295 PUT(SUNI_IDLE_PATTERN,TACP_IUCPOP);
296 dev->phy = &suni_ops;
300 EXPORT_SYMBOL(suni_init);
302 MODULE_LICENSE("GPL");