/* drivers/atm/suni.c - PMC PM5346 SUNI (PHY) driver */ /* 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 <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 struct suni_priv { struct k_sonet_stats sonet_stats; /* link diagnostics */ int loop_mode; /* loopback mode */ struct atm_dev *dev; /* device back-pointer */ struct suni_priv *next; /* next SUNI */ }; #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; control = GET(MCT) & ~(SUNI_MCT_DLE | SUNI_MCT_LLE); switch (mode) { case ATM_LM_NONE: break; case ATM_LM_LOC_PHY: control |= SUNI_MCT_DLE; break; case ATM_LM_RMT_PHY: control |= SUNI_MCT_LLE; break; default: return -EINVAL; } PUT(control,MCT); PRIV(dev)->loop_mode = mode; return 0; } 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 ((int)(unsigned long)arg != SONET_FRAME_SONET) return -EINVAL; return 0; case SONET_GETFRAMING: return put_user(SONET_FRAME_SONET,(int __user *)arg) ? -EFAULT : 0; case SONET_GETFRSENSE: return -EINVAL; case ATM_SETLOOP: 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) { dev->signal = 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; if (!(dev->phy_data = kmalloc(sizeof(struct suni_priv),GFP_KERNEL))) return -ENOMEM; PRIV(dev)->dev = dev; 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 __devinit suni_init(struct atm_dev *dev) { unsigned char mri; mri = GET(MRI); /* reset SUNI */ PUT(mri | SUNI_MRI_RESET,MRI); PUT(mri,MRI); PUT((GET(MT) & SUNI_MT_DS27_53),MT); /* disable all tests */ REG_CHANGE(SUNI_TPOP_APM_S,SUNI_TPOP_APM_S_SHIFT,SUNI_TPOP_S_SONET, TPOP_APM); /* use SONET */ 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");