1 /* drivers/atm/uPD98402.c - NEC uPD98402 (PHY) declarations */
3 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
6 #include <linux/module.h>
7 #include <linux/sched.h> /* for jiffies */
9 #include <linux/errno.h>
10 #include <linux/atmdev.h>
11 #include <linux/sonet.h>
12 #include <linux/init.h>
13 #include <asm/uaccess.h>
14 #include <asm/atomic.h>
20 #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
22 #define DPRINTK(format,args...)
26 struct uPD98402_priv {
27 struct k_sonet_stats sonet_stats;/* link diagnostics */
28 unsigned char framing; /* SONET/SDH framing */
29 int loop_mode; /* loopback mode */
33 #define PRIV(dev) ((struct uPD98402_priv *) dev->phy_data)
35 #define PUT(val,reg) dev->ops->phy_put(dev,val,uPD98402_##reg)
36 #define GET(reg) dev->ops->phy_get(dev,uPD98402_##reg)
39 static int fetch_stats(struct atm_dev *dev,struct sonet_stats *arg,int zero)
41 struct sonet_stats tmp;
44 atomic_add(GET(HECCT),&PRIV(dev)->sonet_stats.uncorr_hcs);
45 sonet_copy_stats(&PRIV(dev)->sonet_stats,&tmp);
46 if (arg) error = copy_to_user(arg,&tmp,sizeof(tmp));
48 /* unused fields are reported as -1, but we must not "adjust"
50 tmp.corr_hcs = tmp.tx_cells = tmp.rx_cells = 0;
51 sonet_subtract_stats(&PRIV(dev)->sonet_stats,&tmp);
53 return error ? -EFAULT : 0;
57 static int set_framing(struct atm_dev *dev,unsigned char framing)
59 static const unsigned char sonet[] = { 1,2,3,0 };
60 static const unsigned char sdh[] = { 1,0,0,2 };
65 case SONET_FRAME_SONET:
79 PUT((GET(MDR) & ~uPD98402_MDR_SS_MASK) | (set[3] <<
80 uPD98402_MDR_SS_SHIFT),MDR);
86 static int get_sense(struct atm_dev *dev,u8 *arg)
97 return (put_user(s[0], arg) || put_user(s[1], arg+1) ||
98 put_user(s[2], arg+2) || put_user(0xff, arg+3) ||
99 put_user(0xff, arg+4) || put_user(0xff, arg+5)) ? -EFAULT : 0;
103 static int set_loopback(struct atm_dev *dev,int mode)
105 unsigned char mode_reg;
107 mode_reg = GET(MDR) & ~(uPD98402_MDR_TPLP | uPD98402_MDR_ALP |
109 switch (__ATM_LM_XTLOC(mode)) {
113 mode_reg |= uPD98402_MDR_TPLP;
116 mode_reg |= uPD98402_MDR_ALP;
121 switch (__ATM_LM_XTRMT(mode)) {
125 mode_reg |= uPD98402_MDR_RPLP;
131 PRIV(dev)->loop_mode = mode;
136 static int uPD98402_ioctl(struct atm_dev *dev,unsigned int cmd,void *arg)
142 return fetch_stats(dev,(struct sonet_stats *) arg,
143 cmd == SONET_GETSTATZ);
144 case SONET_SETFRAMING:
145 return set_framing(dev,(int) (long) arg);
146 case SONET_GETFRAMING:
147 return put_user(PRIV(dev)->framing,(int *) arg) ?
149 case SONET_GETFRSENSE:
150 return get_sense(dev,arg);
152 return set_loopback(dev,(int) (long) arg);
154 return put_user(PRIV(dev)->loop_mode,(int *) arg) ?
157 return put_user(ATM_LM_LOC_PHY | ATM_LM_LOC_ATM |
158 ATM_LM_RMT_PHY,(int *) arg) ? -EFAULT : 0;
165 #define ADD_LIMITED(s,v) \
166 { atomic_add(GET(v),&PRIV(dev)->sonet_stats.s); \
167 if (atomic_read(&PRIV(dev)->sonet_stats.s) < 0) \
168 atomic_set(&PRIV(dev)->sonet_stats.s,INT_MAX); }
171 static void stat_event(struct atm_dev *dev)
173 unsigned char events;
176 if (events & uPD98402_PFM_PFEB) ADD_LIMITED(path_febe,PFECB);
177 if (events & uPD98402_PFM_LFEB) ADD_LIMITED(line_febe,LECCT);
178 if (events & uPD98402_PFM_B3E) ADD_LIMITED(path_bip,B3ECT);
179 if (events & uPD98402_PFM_B2E) ADD_LIMITED(line_bip,B2ECT);
180 if (events & uPD98402_PFM_B1E) ADD_LIMITED(section_bip,B1ECT);
187 static void uPD98402_int(struct atm_dev *dev)
189 static unsigned long silence = 0;
190 unsigned char reason;
192 while ((reason = GET(PICR))) {
193 if (reason & uPD98402_INT_LOS)
194 printk(KERN_NOTICE "%s(itf %d): signal lost\n",
195 dev->type,dev->number);
196 if (reason & uPD98402_INT_PFM) stat_event(dev);
197 if (reason & uPD98402_INT_PCO) {
198 (void) GET(PCOCR); /* clear interrupt cause */
199 atomic_add(GET(HECCT),
200 &PRIV(dev)->sonet_stats.uncorr_hcs);
202 if ((reason & uPD98402_INT_RFO) &&
203 (time_after(jiffies, silence) || silence == 0)) {
204 printk(KERN_WARNING "%s(itf %d): uPD98402 receive "
205 "FIFO overflow\n",dev->type,dev->number);
206 silence = (jiffies+HZ/2)|1;
212 static int uPD98402_start(struct atm_dev *dev)
214 DPRINTK("phy_start\n");
215 if (!(dev->phy_data = kmalloc(sizeof(struct uPD98402_priv),GFP_KERNEL)))
217 memset(&PRIV(dev)->sonet_stats,0,sizeof(struct k_sonet_stats));
218 (void) GET(PCR); /* clear performance events */
219 PUT(uPD98402_PFM_FJ,PCMR); /* ignore frequency adj */
220 (void) GET(PCOCR); /* clear overflows */
221 PUT(~uPD98402_PCO_HECC,PCOMR);
222 (void) GET(PICR); /* clear interrupts */
223 PUT(~(uPD98402_INT_PFM | uPD98402_INT_ALM | uPD98402_INT_RFO |
224 uPD98402_INT_LOS),PIMR); /* enable them */
225 (void) fetch_stats(dev,NULL,1); /* clear kernel counters */
226 atomic_set(&PRIV(dev)->sonet_stats.corr_hcs,-1);
227 atomic_set(&PRIV(dev)->sonet_stats.tx_cells,-1);
228 atomic_set(&PRIV(dev)->sonet_stats.rx_cells,-1);
233 static int uPD98402_stop(struct atm_dev *dev)
235 /* let SAR driver worry about stopping interrupts */
241 static const struct atmphy_ops uPD98402_ops = {
242 start: uPD98402_start,
243 ioctl: uPD98402_ioctl,
244 interrupt: uPD98402_int,
249 int __init uPD98402_init(struct atm_dev *dev)
251 DPRINTK("phy_init\n");
252 dev->phy = &uPD98402_ops;
258 MODULE_LICENSE("GPL");
260 EXPORT_SYMBOL(uPD98402_init);
263 int init_module(void)
270 void cleanup_module(void)