391 lines
9.8 KiB
C
391 lines
9.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* drivers/atm/suni.c - S/UNI PHY driver
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*
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* Supports the following:
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* PMC PM5346 S/UNI LITE
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* PMC PM5350 S/UNI 155 ULTRA
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* PMC PM5355 S/UNI 622
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*/
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/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
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#include <linux/module.h>
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#include <linux/jiffies.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/errno.h>
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#include <linux/atmdev.h>
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#include <linux/sonet.h>
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#include <linux/delay.h>
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#include <linux/timer.h>
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#include <linux/init.h>
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#include <linux/capability.h>
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#include <linux/slab.h>
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#include <asm/param.h>
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#include <linux/uaccess.h>
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#include <linux/atomic.h>
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#include "suni.h"
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#if 0
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#define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
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#else
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#define DPRINTK(format,args...)
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#endif
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#define PRIV(dev) ((struct suni_priv *) dev->phy_data)
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#define PUT(val,reg) dev->ops->phy_put(dev,val,SUNI_##reg)
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#define GET(reg) dev->ops->phy_get(dev,SUNI_##reg)
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#define REG_CHANGE(mask,shift,value,reg) \
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PUT((GET(reg) & ~(mask)) | ((value) << (shift)),reg)
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static struct timer_list poll_timer;
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static struct suni_priv *sunis = NULL;
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static DEFINE_SPINLOCK(sunis_lock);
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#define ADD_LIMITED(s,v) \
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atomic_add((v),&stats->s); \
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if (atomic_read(&stats->s) < 0) atomic_set(&stats->s,INT_MAX);
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static void suni_hz(struct timer_list *timer)
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{
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struct suni_priv *walk;
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struct atm_dev *dev;
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struct k_sonet_stats *stats;
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for (walk = sunis; walk; walk = walk->next) {
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dev = walk->dev;
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stats = &walk->sonet_stats;
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PUT(0,MRI); /* latch counters */
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udelay(1);
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ADD_LIMITED(section_bip,(GET(RSOP_SBL) & 0xff) |
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((GET(RSOP_SBM) & 0xff) << 8));
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ADD_LIMITED(line_bip,(GET(RLOP_LBL) & 0xff) |
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((GET(RLOP_LB) & 0xff) << 8) |
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((GET(RLOP_LBM) & 0xf) << 16));
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ADD_LIMITED(path_bip,(GET(RPOP_PBL) & 0xff) |
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((GET(RPOP_PBM) & 0xff) << 8));
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ADD_LIMITED(line_febe,(GET(RLOP_LFL) & 0xff) |
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((GET(RLOP_LF) & 0xff) << 8) |
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((GET(RLOP_LFM) & 0xf) << 16));
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ADD_LIMITED(path_febe,(GET(RPOP_PFL) & 0xff) |
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((GET(RPOP_PFM) & 0xff) << 8));
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ADD_LIMITED(corr_hcs,GET(RACP_CHEC) & 0xff);
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ADD_LIMITED(uncorr_hcs,GET(RACP_UHEC) & 0xff);
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ADD_LIMITED(rx_cells,(GET(RACP_RCCL) & 0xff) |
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((GET(RACP_RCC) & 0xff) << 8) |
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((GET(RACP_RCCM) & 7) << 16));
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ADD_LIMITED(tx_cells,(GET(TACP_TCCL) & 0xff) |
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((GET(TACP_TCC) & 0xff) << 8) |
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((GET(TACP_TCCM) & 7) << 16));
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}
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if (timer) mod_timer(&poll_timer,jiffies+HZ);
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}
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#undef ADD_LIMITED
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static int fetch_stats(struct atm_dev *dev,struct sonet_stats __user *arg,int zero)
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{
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struct sonet_stats tmp;
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int error = 0;
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sonet_copy_stats(&PRIV(dev)->sonet_stats,&tmp);
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if (arg) error = copy_to_user(arg,&tmp,sizeof(tmp));
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if (zero && !error) sonet_subtract_stats(&PRIV(dev)->sonet_stats,&tmp);
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return error ? -EFAULT : 0;
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}
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#define HANDLE_FLAG(flag,reg,bit) \
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if (todo & flag) { \
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if (set) PUT(GET(reg) | bit,reg); \
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else PUT(GET(reg) & ~bit,reg); \
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todo &= ~flag; \
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}
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static int change_diag(struct atm_dev *dev,void __user *arg,int set)
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{
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int todo;
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if (get_user(todo,(int __user *)arg)) return -EFAULT;
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HANDLE_FLAG(SONET_INS_SBIP,TSOP_DIAG,SUNI_TSOP_DIAG_DBIP8);
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HANDLE_FLAG(SONET_INS_LBIP,TLOP_DIAG,SUNI_TLOP_DIAG_DBIP);
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HANDLE_FLAG(SONET_INS_PBIP,TPOP_CD,SUNI_TPOP_DIAG_DB3);
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HANDLE_FLAG(SONET_INS_FRAME,RSOP_CIE,SUNI_RSOP_CIE_FOOF);
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HANDLE_FLAG(SONET_INS_LAIS,TSOP_CTRL,SUNI_TSOP_CTRL_LAIS);
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HANDLE_FLAG(SONET_INS_PAIS,TPOP_CD,SUNI_TPOP_DIAG_PAIS);
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HANDLE_FLAG(SONET_INS_LOS,TSOP_DIAG,SUNI_TSOP_DIAG_DLOS);
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HANDLE_FLAG(SONET_INS_HCS,TACP_CS,SUNI_TACP_CS_DHCS);
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return put_user(todo,(int __user *)arg) ? -EFAULT : 0;
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}
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#undef HANDLE_FLAG
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static int get_diag(struct atm_dev *dev,void __user *arg)
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{
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int set;
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set = 0;
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if (GET(TSOP_DIAG) & SUNI_TSOP_DIAG_DBIP8) set |= SONET_INS_SBIP;
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if (GET(TLOP_DIAG) & SUNI_TLOP_DIAG_DBIP) set |= SONET_INS_LBIP;
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if (GET(TPOP_CD) & SUNI_TPOP_DIAG_DB3) set |= SONET_INS_PBIP;
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/* SONET_INS_FRAME is one-shot only */
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if (GET(TSOP_CTRL) & SUNI_TSOP_CTRL_LAIS) set |= SONET_INS_LAIS;
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if (GET(TPOP_CD) & SUNI_TPOP_DIAG_PAIS) set |= SONET_INS_PAIS;
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if (GET(TSOP_DIAG) & SUNI_TSOP_DIAG_DLOS) set |= SONET_INS_LOS;
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if (GET(TACP_CS) & SUNI_TACP_CS_DHCS) set |= SONET_INS_HCS;
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return put_user(set,(int __user *)arg) ? -EFAULT : 0;
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}
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static int set_loopback(struct atm_dev *dev,int mode)
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{
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unsigned char control;
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int reg, dle, lle;
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if (PRIV(dev)->type == SUNI_MRI_TYPE_PM5355) {
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reg = SUNI_MCM;
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dle = SUNI_MCM_DLE;
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lle = SUNI_MCM_LLE;
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} else {
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reg = SUNI_MCT;
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dle = SUNI_MCT_DLE;
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lle = SUNI_MCT_LLE;
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}
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control = dev->ops->phy_get(dev, reg) & ~(dle | lle);
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switch (mode) {
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case ATM_LM_NONE:
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break;
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case ATM_LM_LOC_PHY:
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control |= dle;
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break;
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case ATM_LM_RMT_PHY:
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control |= lle;
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break;
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default:
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return -EINVAL;
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}
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dev->ops->phy_put(dev, control, reg);
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PRIV(dev)->loop_mode = mode;
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return 0;
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}
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/*
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* SONET vs. SDH Configuration
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*
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* Z0INS (register 0x06): 0 for SONET, 1 for SDH
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* ENSS (register 0x3D): 0 for SONET, 1 for SDH
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* LEN16 (register 0x28): 0 for SONET, 1 for SDH (n/a for S/UNI 155 QUAD)
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* LEN16 (register 0x50): 0 for SONET, 1 for SDH (n/a for S/UNI 155 QUAD)
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* S[1:0] (register 0x46): 00 for SONET, 10 for SDH
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*/
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static int set_sonet(struct atm_dev *dev)
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{
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if (PRIV(dev)->type == SUNI_MRI_TYPE_PM5355) {
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PUT(GET(RPOP_RC) & ~SUNI_RPOP_RC_ENSS, RPOP_RC);
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PUT(GET(SSTB_CTRL) & ~SUNI_SSTB_CTRL_LEN16, SSTB_CTRL);
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PUT(GET(SPTB_CTRL) & ~SUNI_SPTB_CTRL_LEN16, SPTB_CTRL);
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}
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REG_CHANGE(SUNI_TPOP_APM_S, SUNI_TPOP_APM_S_SHIFT,
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SUNI_TPOP_S_SONET, TPOP_APM);
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return 0;
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}
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static int set_sdh(struct atm_dev *dev)
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{
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if (PRIV(dev)->type == SUNI_MRI_TYPE_PM5355) {
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PUT(GET(RPOP_RC) | SUNI_RPOP_RC_ENSS, RPOP_RC);
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PUT(GET(SSTB_CTRL) | SUNI_SSTB_CTRL_LEN16, SSTB_CTRL);
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PUT(GET(SPTB_CTRL) | SUNI_SPTB_CTRL_LEN16, SPTB_CTRL);
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}
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REG_CHANGE(SUNI_TPOP_APM_S, SUNI_TPOP_APM_S_SHIFT,
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SUNI_TPOP_S_SDH, TPOP_APM);
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return 0;
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}
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static int get_framing(struct atm_dev *dev, void __user *arg)
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{
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int framing;
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unsigned char s;
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s = (GET(TPOP_APM) & SUNI_TPOP_APM_S) >> SUNI_TPOP_APM_S_SHIFT;
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if (s == SUNI_TPOP_S_SONET)
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framing = SONET_FRAME_SONET;
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else
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framing = SONET_FRAME_SDH;
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return put_user(framing, (int __user *) arg) ? -EFAULT : 0;
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}
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static int set_framing(struct atm_dev *dev, void __user *arg)
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{
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int mode;
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if (get_user(mode, (int __user *) arg))
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return -EFAULT;
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if (mode == SONET_FRAME_SONET)
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return set_sonet(dev);
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else if (mode == SONET_FRAME_SDH)
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return set_sdh(dev);
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return -EINVAL;
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}
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static int suni_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
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{
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switch (cmd) {
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case SONET_GETSTATZ:
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case SONET_GETSTAT:
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return fetch_stats(dev, arg, cmd == SONET_GETSTATZ);
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case SONET_SETDIAG:
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return change_diag(dev,arg,1);
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case SONET_CLRDIAG:
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return change_diag(dev,arg,0);
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case SONET_GETDIAG:
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return get_diag(dev,arg);
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case SONET_SETFRAMING:
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if (!capable(CAP_NET_ADMIN))
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return -EPERM;
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return set_framing(dev, arg);
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case SONET_GETFRAMING:
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return get_framing(dev, arg);
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case SONET_GETFRSENSE:
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return -EINVAL;
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case ATM_SETLOOP:
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if (!capable(CAP_NET_ADMIN))
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return -EPERM;
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return set_loopback(dev,(int)(unsigned long)arg);
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case ATM_GETLOOP:
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return put_user(PRIV(dev)->loop_mode,(int __user *)arg) ?
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-EFAULT : 0;
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case ATM_QUERYLOOP:
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return put_user(ATM_LM_LOC_PHY | ATM_LM_RMT_PHY,
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(int __user *) arg) ? -EFAULT : 0;
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default:
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return -ENOIOCTLCMD;
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}
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}
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static void poll_los(struct atm_dev *dev)
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{
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atm_dev_signal_change(dev,
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GET(RSOP_SIS) & SUNI_RSOP_SIS_LOSV ?
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ATM_PHY_SIG_LOST : ATM_PHY_SIG_FOUND);
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}
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static void suni_int(struct atm_dev *dev)
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{
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poll_los(dev);
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printk(KERN_NOTICE "%s(itf %d): signal %s\n",dev->type,dev->number,
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dev->signal == ATM_PHY_SIG_LOST ? "lost" : "detected again");
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}
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static int suni_start(struct atm_dev *dev)
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{
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unsigned long flags;
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int first;
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spin_lock_irqsave(&sunis_lock,flags);
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first = !sunis;
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PRIV(dev)->next = sunis;
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sunis = PRIV(dev);
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spin_unlock_irqrestore(&sunis_lock,flags);
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memset(&PRIV(dev)->sonet_stats,0,sizeof(struct k_sonet_stats));
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PUT(GET(RSOP_CIE) | SUNI_RSOP_CIE_LOSE,RSOP_CIE);
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/* interrupt on loss of signal */
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poll_los(dev); /* ... and clear SUNI interrupts */
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if (dev->signal == ATM_PHY_SIG_LOST)
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printk(KERN_WARNING "%s(itf %d): no signal\n",dev->type,
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dev->number);
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PRIV(dev)->loop_mode = ATM_LM_NONE;
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suni_hz(NULL); /* clear SUNI counters */
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(void) fetch_stats(dev,NULL,1); /* clear kernel counters */
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if (first) {
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timer_setup(&poll_timer, suni_hz, 0);
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poll_timer.expires = jiffies+HZ;
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#if 0
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printk(KERN_DEBUG "[u] p=0x%lx,n=0x%lx\n",(unsigned long) poll_timer.list.prev,
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(unsigned long) poll_timer.list.next);
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#endif
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add_timer(&poll_timer);
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}
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return 0;
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}
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static int suni_stop(struct atm_dev *dev)
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{
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struct suni_priv **walk;
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unsigned long flags;
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/* let SAR driver worry about stopping interrupts */
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spin_lock_irqsave(&sunis_lock,flags);
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for (walk = &sunis; *walk != PRIV(dev);
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walk = &PRIV((*walk)->dev)->next);
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*walk = PRIV((*walk)->dev)->next;
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if (!sunis) del_timer_sync(&poll_timer);
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spin_unlock_irqrestore(&sunis_lock,flags);
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kfree(PRIV(dev));
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return 0;
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}
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static const struct atmphy_ops suni_ops = {
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.start = suni_start,
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.ioctl = suni_ioctl,
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.interrupt = suni_int,
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.stop = suni_stop,
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};
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int suni_init(struct atm_dev *dev)
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{
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unsigned char mri;
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if (!(dev->phy_data = kmalloc(sizeof(struct suni_priv),GFP_KERNEL)))
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return -ENOMEM;
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PRIV(dev)->dev = dev;
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mri = GET(MRI); /* reset SUNI */
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PRIV(dev)->type = (mri & SUNI_MRI_TYPE) >> SUNI_MRI_TYPE_SHIFT;
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PUT(mri | SUNI_MRI_RESET,MRI);
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PUT(mri,MRI);
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PUT((GET(MT) & SUNI_MT_DS27_53),MT); /* disable all tests */
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set_sonet(dev);
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REG_CHANGE(SUNI_TACP_IUCHP_CLP,0,SUNI_TACP_IUCHP_CLP,
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TACP_IUCHP); /* idle cells */
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PUT(SUNI_IDLE_PATTERN,TACP_IUCPOP);
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dev->phy = &suni_ops;
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return 0;
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}
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EXPORT_SYMBOL(suni_init);
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MODULE_LICENSE("GPL");
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