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...)
34 struct k_sonet_stats sonet_stats; /* link diagnostics */
35 int loop_mode; /* loopback mode */
36 struct atm_dev *dev; /* device back-pointer */
37 struct suni_priv *next; /* next SUNI */
41 #define PRIV(dev) ((struct suni_priv *) dev->phy_data)
43 #define PUT(val,reg) dev->ops->phy_put(dev,val,SUNI_##reg)
44 #define GET(reg) dev->ops->phy_get(dev,SUNI_##reg)
45 #define REG_CHANGE(mask,shift,value,reg) \
46 PUT((GET(reg) & ~(mask)) | ((value) << (shift)),reg)
49 static struct timer_list poll_timer;
50 static struct suni_priv *sunis = NULL;
51 static DEFINE_SPINLOCK(sunis_lock);
54 #define ADD_LIMITED(s,v) \
55 atomic_add((v),&stats->s); \
56 if (atomic_read(&stats->s) < 0) atomic_set(&stats->s,INT_MAX);
59 static void suni_hz(unsigned long from_timer)
61 struct suni_priv *walk;
63 struct k_sonet_stats *stats;
65 for (walk = sunis; walk; walk = walk->next) {
67 stats = &walk->sonet_stats;
68 PUT(0,MRI); /* latch counters */
70 ADD_LIMITED(section_bip,(GET(RSOP_SBL) & 0xff) |
71 ((GET(RSOP_SBM) & 0xff) << 8));
72 ADD_LIMITED(line_bip,(GET(RLOP_LBL) & 0xff) |
73 ((GET(RLOP_LB) & 0xff) << 8) |
74 ((GET(RLOP_LBM) & 0xf) << 16));
75 ADD_LIMITED(path_bip,(GET(RPOP_PBL) & 0xff) |
76 ((GET(RPOP_PBM) & 0xff) << 8));
77 ADD_LIMITED(line_febe,(GET(RLOP_LFL) & 0xff) |
78 ((GET(RLOP_LF) & 0xff) << 8) |
79 ((GET(RLOP_LFM) & 0xf) << 16));
80 ADD_LIMITED(path_febe,(GET(RPOP_PFL) & 0xff) |
81 ((GET(RPOP_PFM) & 0xff) << 8));
82 ADD_LIMITED(corr_hcs,GET(RACP_CHEC) & 0xff);
83 ADD_LIMITED(uncorr_hcs,GET(RACP_UHEC) & 0xff);
84 ADD_LIMITED(rx_cells,(GET(RACP_RCCL) & 0xff) |
85 ((GET(RACP_RCC) & 0xff) << 8) |
86 ((GET(RACP_RCCM) & 7) << 16));
87 ADD_LIMITED(tx_cells,(GET(TACP_TCCL) & 0xff) |
88 ((GET(TACP_TCC) & 0xff) << 8) |
89 ((GET(TACP_TCCM) & 7) << 16));
91 if (from_timer) mod_timer(&poll_timer,jiffies+HZ);
98 static int fetch_stats(struct atm_dev *dev,struct sonet_stats __user *arg,int zero)
100 struct sonet_stats tmp;
103 sonet_copy_stats(&PRIV(dev)->sonet_stats,&tmp);
104 if (arg) error = copy_to_user(arg,&tmp,sizeof(tmp));
105 if (zero && !error) sonet_subtract_stats(&PRIV(dev)->sonet_stats,&tmp);
106 return error ? -EFAULT : 0;
110 #define HANDLE_FLAG(flag,reg,bit) \
112 if (set) PUT(GET(reg) | bit,reg); \
113 else PUT(GET(reg) & ~bit,reg); \
118 static int change_diag(struct atm_dev *dev,void __user *arg,int set)
122 if (get_user(todo,(int __user *)arg)) return -EFAULT;
123 HANDLE_FLAG(SONET_INS_SBIP,TSOP_DIAG,SUNI_TSOP_DIAG_DBIP8);
124 HANDLE_FLAG(SONET_INS_LBIP,TLOP_DIAG,SUNI_TLOP_DIAG_DBIP);
125 HANDLE_FLAG(SONET_INS_PBIP,TPOP_CD,SUNI_TPOP_DIAG_DB3);
126 HANDLE_FLAG(SONET_INS_FRAME,RSOP_CIE,SUNI_RSOP_CIE_FOOF);
127 HANDLE_FLAG(SONET_INS_LAIS,TSOP_CTRL,SUNI_TSOP_CTRL_LAIS);
128 HANDLE_FLAG(SONET_INS_PAIS,TPOP_CD,SUNI_TPOP_DIAG_PAIS);
129 HANDLE_FLAG(SONET_INS_LOS,TSOP_DIAG,SUNI_TSOP_DIAG_DLOS);
130 HANDLE_FLAG(SONET_INS_HCS,TACP_CS,SUNI_TACP_CS_DHCS);
131 return put_user(todo,(int __user *)arg) ? -EFAULT : 0;
138 static int get_diag(struct atm_dev *dev,void __user *arg)
143 if (GET(TSOP_DIAG) & SUNI_TSOP_DIAG_DBIP8) set |= SONET_INS_SBIP;
144 if (GET(TLOP_DIAG) & SUNI_TLOP_DIAG_DBIP) set |= SONET_INS_LBIP;
145 if (GET(TPOP_CD) & SUNI_TPOP_DIAG_DB3) set |= SONET_INS_PBIP;
146 /* SONET_INS_FRAME is one-shot only */
147 if (GET(TSOP_CTRL) & SUNI_TSOP_CTRL_LAIS) set |= SONET_INS_LAIS;
148 if (GET(TPOP_CD) & SUNI_TPOP_DIAG_PAIS) set |= SONET_INS_PAIS;
149 if (GET(TSOP_DIAG) & SUNI_TSOP_DIAG_DLOS) set |= SONET_INS_LOS;
150 if (GET(TACP_CS) & SUNI_TACP_CS_DHCS) set |= SONET_INS_HCS;
151 return put_user(set,(int __user *)arg) ? -EFAULT : 0;
155 static int set_loopback(struct atm_dev *dev,int mode)
157 unsigned char control;
159 control = GET(MCT) & ~(SUNI_MCT_DLE | SUNI_MCT_LLE);
164 control |= SUNI_MCT_DLE;
167 control |= SUNI_MCT_LLE;
173 PRIV(dev)->loop_mode = mode;
178 static int suni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
183 return fetch_stats(dev, arg, cmd == SONET_GETSTATZ);
185 return change_diag(dev,arg,1);
187 return change_diag(dev,arg,0);
189 return get_diag(dev,arg);
190 case SONET_SETFRAMING:
191 if (arg != SONET_FRAME_SONET) return -EINVAL;
193 case SONET_GETFRAMING:
194 return put_user(SONET_FRAME_SONET,(int __user *)arg) ?
196 case SONET_GETFRSENSE:
199 return set_loopback(dev,(int)(unsigned long)arg);
201 return put_user(PRIV(dev)->loop_mode,(int __user *)arg) ?
204 return put_user(ATM_LM_LOC_PHY | ATM_LM_RMT_PHY,
205 (int __user *) arg) ? -EFAULT : 0;
212 static void poll_los(struct atm_dev *dev)
214 dev->signal = GET(RSOP_SIS) & SUNI_RSOP_SIS_LOSV ? ATM_PHY_SIG_LOST :
219 static void suni_int(struct atm_dev *dev)
222 printk(KERN_NOTICE "%s(itf %d): signal %s\n",dev->type,dev->number,
223 dev->signal == ATM_PHY_SIG_LOST ? "lost" : "detected again");
227 static int suni_start(struct atm_dev *dev)
232 if (!(dev->phy_data = kmalloc(sizeof(struct suni_priv),GFP_KERNEL)))
235 PRIV(dev)->dev = dev;
236 spin_lock_irqsave(&sunis_lock,flags);
238 PRIV(dev)->next = sunis;
240 spin_unlock_irqrestore(&sunis_lock,flags);
241 memset(&PRIV(dev)->sonet_stats,0,sizeof(struct k_sonet_stats));
242 PUT(GET(RSOP_CIE) | SUNI_RSOP_CIE_LOSE,RSOP_CIE);
243 /* interrupt on loss of signal */
244 poll_los(dev); /* ... and clear SUNI interrupts */
245 if (dev->signal == ATM_PHY_SIG_LOST)
246 printk(KERN_WARNING "%s(itf %d): no signal\n",dev->type,
248 PRIV(dev)->loop_mode = ATM_LM_NONE;
249 suni_hz(0); /* clear SUNI counters */
250 (void) fetch_stats(dev,NULL,1); /* clear kernel counters */
252 init_timer(&poll_timer);
253 poll_timer.expires = jiffies+HZ;
254 poll_timer.function = suni_hz;
257 printk(KERN_DEBUG "[u] p=0x%lx,n=0x%lx\n",(unsigned long) poll_timer.list.prev,
258 (unsigned long) poll_timer.list.next);
260 add_timer(&poll_timer);
266 static int suni_stop(struct atm_dev *dev)
268 struct suni_priv **walk;
271 /* let SAR driver worry about stopping interrupts */
272 spin_lock_irqsave(&sunis_lock,flags);
273 for (walk = &sunis; *walk != PRIV(dev);
274 walk = &PRIV((*walk)->dev)->next);
275 *walk = PRIV((*walk)->dev)->next;
276 if (!sunis) del_timer_sync(&poll_timer);
277 spin_unlock_irqrestore(&sunis_lock,flags);
284 static const struct atmphy_ops suni_ops = {
287 .interrupt = suni_int,
292 int suni_init(struct atm_dev *dev)
296 mri = GET(MRI); /* reset SUNI */
297 PUT(mri | SUNI_MRI_RESET,MRI);
299 PUT((GET(MT) & SUNI_MT_DS27_53),MT); /* disable all tests */
300 REG_CHANGE(SUNI_TPOP_APM_S,SUNI_TPOP_APM_S_SHIFT,SUNI_TPOP_S_SONET,
301 TPOP_APM); /* use SONET */
302 REG_CHANGE(SUNI_TACP_IUCHP_CLP,0,SUNI_TACP_IUCHP_CLP,
303 TACP_IUCHP); /* idle cells */
304 PUT(SUNI_IDLE_PATTERN,TACP_IUCPOP);
305 dev->phy = &suni_ops;
309 EXPORT_SYMBOL(suni_init);
311 MODULE_LICENSE("GPL");