1 // SPDX-License-Identifier: GPL-2.0-only
2 /* drivers/atm/idt77105.c - IDT77105 (PHY) driver */
36 	struct atm_dev *dev;		/* device back-pointer */
39         unsigned char old_mcr;          /* storage of MCR reg while signal lost */
44 #define PRIV(dev) ((struct idt77105_priv *) dev->phy_data)
46 #define PUT(val,reg) dev->ops->phy_put(dev,val,IDT77105_##reg)
47 #define GET(reg) dev->ops->phy_get(dev,IDT77105_##reg)
59  * Retrieve the value of one of the IDT77105's counters.
60  * `counter' is one of the IDT77105_CTRSEL_* constants.
81  * a separate copy of the stats allows implementation of
91 	for (walk = idt77105_all; walk; walk = walk->next) {  in idt77105_stats_timer_func()
92 		dev = walk->dev;  in idt77105_stats_timer_func()
94 		stats = &walk->stats;  in idt77105_stats_timer_func()
95                 stats->symbol_errors += get_counter(dev, IDT77105_CTRSEL_SEC);  in idt77105_stats_timer_func()
96                 stats->tx_cells += get_counter(dev, IDT77105_CTRSEL_TCC);  in idt77105_stats_timer_func()
97                 stats->rx_cells += get_counter(dev, IDT77105_CTRSEL_RCC);  in idt77105_stats_timer_func()
98                 stats->rx_hec_errors += get_counter(dev, IDT77105_CTRSEL_RHEC);  in idt77105_stats_timer_func()
106  * have had the cable re-inserted after being pulled out. This is
107  * done by polling the Good Signal Bit in the Interrupt Status
109  * Signal Bit in the interrupt handler) cannot be used because PHY
111  * to avoid lots of spurious cell error interrupts.
119         DPRINTK("IDT77105 checking for cable re-insertion\n");  in idt77105_restart_timer_func()
120 	for (walk = idt77105_all; walk; walk = walk->next) {  in idt77105_restart_timer_func()
121 		dev = walk->dev;  in idt77105_restart_timer_func()
123                 if (dev->signal != ATM_PHY_SIG_LOST)  in idt77105_restart_timer_func()
128                     /* Found signal again */  in idt77105_restart_timer_func()
130 	            printk(KERN_NOTICE "%s(itf %d): signal detected again\n",  in idt77105_restart_timer_func()
131                         dev->type,dev->number);  in idt77105_restart_timer_func()
134                     /* re-enable interrupts */  in idt77105_restart_timer_func()
135 	            PUT( walk->old_mcr ,MCR);  in idt77105_restart_timer_func()
148 	memcpy(&stats, &PRIV(dev)->stats, sizeof(struct idt77105_stats));  in fetch_stats()
150 		memset(&PRIV(dev)->stats, 0, sizeof(struct idt77105_stats));  in fetch_stats()
155 		    sizeof(struct idt77105_stats)) ? -EFAULT : 0;  in fetch_stats()
174 			return -EINVAL;  in set_loopback()
177 	printk(KERN_NOTICE "%s(%d) Loopback mode is: %s\n", dev->type,  in set_loopback()
178 	    dev->number,  in set_loopback()
184 	PRIV(dev)->loop_mode = mode;  in set_loopback()
191         printk(KERN_NOTICE "%s(%d) idt77105_ioctl() called\n",dev->type,dev->number);  in idt77105_ioctl()
194 			if (!capable(CAP_NET_ADMIN)) return -EPERM;  in idt77105_ioctl()
201 			return put_user(PRIV(dev)->loop_mode,(int __user *)arg) ?  in idt77105_ioctl()
202 			    -EFAULT : 0;  in idt77105_ioctl()
205 			    (int __user *) arg) ? -EFAULT : 0;  in idt77105_ioctl()
207 			return -ENOIOCTLCMD;  in idt77105_ioctl()
222             /* Rx Signal Condition Change - line went up or down */  in idt77105_int()
223             if (istat & IDT77105_ISTAT_GOODSIG) {   /* signal detected again */  in idt77105_int()
226             } else {    /* signal lost */  in idt77105_int()
229                  * reception - the restart timer will restore these.  in idt77105_int()
231                 PRIV(dev)->old_mcr = GET(MCR);  in idt77105_int()
233                     (PRIV(dev)->old_mcr|  in idt77105_int()
239 	        printk(KERN_NOTICE "%s(itf %d): signal lost\n",  in idt77105_int()
240                     dev->type,dev->number);  in idt77105_int()
245             /* Rx FIFO Overrun -- perform a FIFO flush */  in idt77105_int()
248                 dev->type,dev->number);  in idt77105_int()
253             /* normally don't care - just report in stats */  in idt77105_int()
255                 dev->type,dev->number);  in idt77105_int()
265 	if (!(dev->phy_data = kmalloc(sizeof(struct idt77105_priv),GFP_KERNEL)))  in idt77105_start()
266 		return -ENOMEM;  in idt77105_start()
267 	PRIV(dev)->dev = dev;  in idt77105_start()
269 	PRIV(dev)->next = idt77105_all;  in idt77105_start()
272 	memset(&PRIV(dev)->stats,0,sizeof(struct idt77105_stats));  in idt77105_start()
274         /* initialise dev->signal from Good Signal Bit */  in idt77105_start()
278 	if (dev->signal == ATM_PHY_SIG_LOST)  in idt77105_start()
279 		printk(KERN_WARNING "%s(itf %d): no signal\n",dev->type,  in idt77105_start()
280 		    dev->number);  in idt77105_start()
285             PRIV(dev)->loop_mode = ATM_LM_NONE;  in idt77105_start()
288             PRIV(dev)->loop_mode = ATM_LM_LOC_ATM;  in idt77105_start()
291             PRIV(dev)->loop_mode = ATM_LM_RMT_ATM;  in idt77105_start()
295         /* enable interrupts, e.g. on loss of signal */  in idt77105_start()
296         PRIV(dev)->old_mcr = GET(MCR);  in idt77105_start()
297         if (dev->signal == ATM_PHY_SIG_FOUND) {  in idt77105_start()
298             PRIV(dev)->old_mcr |= IDT77105_MCR_EIP;  in idt77105_start()
299 	    PUT(PRIV(dev)->old_mcr, MCR);  in idt77105_start()
325         DPRINTK("%s(itf %d): stopping IDT77105\n",dev->type,dev->number);  in idt77105_stop()
333              prev = walk, walk = walk->next) {  in idt77105_stop()
334             if (walk->dev == dev) {  in idt77105_stop()
336                     prev->next = walk->next;  in idt77105_stop()
338                     idt77105_all = walk->next;  in idt77105_stop()
339 	        dev->phy = NULL;  in idt77105_stop()
340                 dev->phy_data = NULL;  in idt77105_stop()
360 	dev->phy = &idt77105_ops;  in idt77105_init()