suni.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:8k
- /* drivers/atm/suni.c - PMC PM5346 SUNI (PHY) driver */
-
- /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
- #include <linux/module.h>
- #include <linux/sched.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 spinlock_t sunis_lock = SPIN_LOCK_UNLOCKED;
- #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 *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 *arg,int set)
- {
- int todo;
- if (get_user(todo,(int *) 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 *) arg) ? -EFAULT : 0;
- }
- #undef HANDLE_FLAG
- static int get_diag(struct atm_dev *dev,void *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 *) 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 *arg)
- {
- switch (cmd) {
- case SONET_GETSTATZ:
- case SONET_GETSTAT:
- return fetch_stats(dev,(struct sonet_stats *) 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 (arg != SONET_FRAME_SONET) return -EINVAL;
- return 0;
- case SONET_GETFRAMING:
- return put_user(SONET_FRAME_SONET,(int *) arg) ?
- -EFAULT : 0;
- case SONET_GETFRSENSE:
- return -EINVAL;
- case ATM_SETLOOP:
- return set_loopback(dev,(int) (long) arg);
- case ATM_GETLOOP:
- return put_user(PRIV(dev)->loop_mode,(int *) arg) ?
- -EFAULT : 0;
- case ATM_QUERYLOOP:
- return put_user(ATM_LM_LOC_PHY | ATM_LM_RMT_PHY,
- (int *) 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 %sn",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 (!(PRIV(dev) = kmalloc(sizeof(struct suni_priv),GFP_KERNEL)))
- return -ENOMEM;
- MOD_INC_USE_COUNT;
- 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 signaln",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%lxn",(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));
- MOD_DEC_USE_COUNT;
- return 0;
- }
- static const struct atmphy_ops suni_ops = {
- start: suni_start,
- ioctl: suni_ioctl,
- interrupt: suni_int,
- stop: suni_stop,
- };
- int __init suni_init(struct atm_dev *dev)
- {
- unsigned char mri;
- mri = GET(MRI); /* reset SUNI */
- PUT(mri | SUNI_MRI_RESET,MRI);
- PUT(mri,MRI);
- PUT(0,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");
- #ifdef MODULE
- int init_module(void)
- {
- return 0;
- }
- void cleanup_module(void)
- {
- /* Nay */
- }
- #endif