^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /* drivers/atm/idt77105.c - IDT77105 (PHY) driver */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) /* Written 1999 by Greg Banks, NEC Australia <gnb@linuxfan.com>. Based on suni.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/atmdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/sonet.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/timer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/capability.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/atm_idt77105.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <asm/param.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include "idt77105.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #undef GENERAL_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #ifdef GENERAL_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #define DPRINTK(format,args...) printk(KERN_DEBUG format,##args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #define DPRINTK(format,args...)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) struct idt77105_priv {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) struct idt77105_stats stats; /* link diagnostics */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct atm_dev *dev; /* device back-pointer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) struct idt77105_priv *next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) int loop_mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) unsigned char old_mcr; /* storage of MCR reg while signal lost */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) static DEFINE_SPINLOCK(idt77105_priv_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define PRIV(dev) ((struct idt77105_priv *) dev->phy_data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define PUT(val,reg) dev->ops->phy_put(dev,val,IDT77105_##reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define GET(reg) dev->ops->phy_get(dev,IDT77105_##reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static void idt77105_stats_timer_func(struct timer_list *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static void idt77105_restart_timer_func(struct timer_list *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) static DEFINE_TIMER(stats_timer, idt77105_stats_timer_func);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) static DEFINE_TIMER(restart_timer, idt77105_restart_timer_func);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) static int start_timer = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) static struct idt77105_priv *idt77105_all = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) * Retrieve the value of one of the IDT77105's counters.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) * `counter' is one of the IDT77105_CTRSEL_* constants.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) static u16 get_counter(struct atm_dev *dev, int counter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) u16 val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) /* write the counter bit into PHY register 6 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) PUT(counter, CTRSEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /* read the low 8 bits from register 4 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) val = GET(CTRLO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) /* read the high 8 bits from register 5 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) val |= GET(CTRHI)<<8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) return val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) * Timer function called every second to gather statistics
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) * from the 77105. This is done because the h/w registers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) * will overflow if not read at least once per second. The
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) * kernel's stats are much higher precision. Also, having
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) * a separate copy of the stats allows implementation of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) * an ioctl which gathers the stats *without* zero'ing them.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) static void idt77105_stats_timer_func(struct timer_list *unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) struct idt77105_priv *walk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) struct atm_dev *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) struct idt77105_stats *stats;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) DPRINTK("IDT77105 gathering statistics\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) for (walk = idt77105_all; walk; walk = walk->next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) dev = walk->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) stats = &walk->stats;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) stats->symbol_errors += get_counter(dev, IDT77105_CTRSEL_SEC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) stats->tx_cells += get_counter(dev, IDT77105_CTRSEL_TCC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) stats->rx_cells += get_counter(dev, IDT77105_CTRSEL_RCC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) stats->rx_hec_errors += get_counter(dev, IDT77105_CTRSEL_RHEC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) if (!start_timer) mod_timer(&stats_timer,jiffies+IDT77105_STATS_TIMER_PERIOD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) * A separate timer func which handles restarting PHY chips which
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) * have had the cable re-inserted after being pulled out. This is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) * done by polling the Good Signal Bit in the Interrupt Status
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) * register every 5 seconds. The other technique (checking Good
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) * Signal Bit in the interrupt handler) cannot be used because PHY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) * interrupts need to be disabled when the cable is pulled out
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) * to avoid lots of spurious cell error interrupts.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) static void idt77105_restart_timer_func(struct timer_list *unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) struct idt77105_priv *walk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) struct atm_dev *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) unsigned char istat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) DPRINTK("IDT77105 checking for cable re-insertion\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) for (walk = idt77105_all; walk; walk = walk->next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) dev = walk->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) if (dev->signal != ATM_PHY_SIG_LOST)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) istat = GET(ISTAT); /* side effect: clears all interrupt status bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) if (istat & IDT77105_ISTAT_GOODSIG) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) /* Found signal again */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) atm_dev_signal_change(dev, ATM_PHY_SIG_FOUND);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) printk(KERN_NOTICE "%s(itf %d): signal detected again\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) dev->type,dev->number);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) /* flush the receive FIFO */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) PUT( GET(DIAG) | IDT77105_DIAG_RFLUSH, DIAG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) /* re-enable interrupts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) PUT( walk->old_mcr ,MCR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if (!start_timer) mod_timer(&restart_timer,jiffies+IDT77105_RESTART_TIMER_PERIOD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) static int fetch_stats(struct atm_dev *dev,struct idt77105_stats __user *arg,int zero)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) struct idt77105_stats stats;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) spin_lock_irqsave(&idt77105_priv_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) memcpy(&stats, &PRIV(dev)->stats, sizeof(struct idt77105_stats));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) if (zero)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) memset(&PRIV(dev)->stats, 0, sizeof(struct idt77105_stats));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) spin_unlock_irqrestore(&idt77105_priv_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) if (arg == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) return copy_to_user(arg, &stats,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) sizeof(struct idt77105_stats)) ? -EFAULT : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) static int set_loopback(struct atm_dev *dev,int mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) int diag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) diag = GET(DIAG) & ~IDT77105_DIAG_LCMASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) switch (mode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) case ATM_LM_NONE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) case ATM_LM_LOC_ATM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) diag |= IDT77105_DIAG_LC_PHY_LOOPBACK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) case ATM_LM_RMT_ATM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) diag |= IDT77105_DIAG_LC_LINE_LOOPBACK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) PUT(diag,DIAG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) printk(KERN_NOTICE "%s(%d) Loopback mode is: %s\n", dev->type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) dev->number,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) (mode == ATM_LM_NONE ? "NONE" :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) (mode == ATM_LM_LOC_ATM ? "DIAG (local)" :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) (mode == IDT77105_DIAG_LC_LINE_LOOPBACK ? "LOOP (remote)" :
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) "unknown")))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) PRIV(dev)->loop_mode = mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) static int idt77105_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) printk(KERN_NOTICE "%s(%d) idt77105_ioctl() called\n",dev->type,dev->number);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) case IDT77105_GETSTATZ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) if (!capable(CAP_NET_ADMIN)) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) case IDT77105_GETSTAT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) return fetch_stats(dev, arg, cmd == IDT77105_GETSTATZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) case ATM_SETLOOP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) return set_loopback(dev,(int)(unsigned long) arg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) case ATM_GETLOOP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) return put_user(PRIV(dev)->loop_mode,(int __user *)arg) ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) -EFAULT : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) case ATM_QUERYLOOP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) return put_user(ATM_LM_LOC_ATM | ATM_LM_RMT_ATM,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) (int __user *) arg) ? -EFAULT : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) return -ENOIOCTLCMD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) static void idt77105_int(struct atm_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) unsigned char istat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) istat = GET(ISTAT); /* side effect: clears all interrupt status bits */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) DPRINTK("IDT77105 generated an interrupt, istat=%02x\n", (unsigned)istat);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) if (istat & IDT77105_ISTAT_RSCC) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) /* Rx Signal Condition Change - line went up or down */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) if (istat & IDT77105_ISTAT_GOODSIG) { /* signal detected again */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) /* This should not happen (restart timer does it) but JIC */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) atm_dev_signal_change(dev, ATM_PHY_SIG_FOUND);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) } else { /* signal lost */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) * Disable interrupts and stop all transmission and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) * reception - the restart timer will restore these.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) PRIV(dev)->old_mcr = GET(MCR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) PUT(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) (PRIV(dev)->old_mcr|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) IDT77105_MCR_DREC|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) IDT77105_MCR_DRIC|
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) IDT77105_MCR_HALTTX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) ) & ~IDT77105_MCR_EIP, MCR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) atm_dev_signal_change(dev, ATM_PHY_SIG_LOST);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) printk(KERN_NOTICE "%s(itf %d): signal lost\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) dev->type,dev->number);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) if (istat & IDT77105_ISTAT_RFO) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) /* Rx FIFO Overrun -- perform a FIFO flush */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) PUT( GET(DIAG) | IDT77105_DIAG_RFLUSH, DIAG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) printk(KERN_NOTICE "%s(itf %d): receive FIFO overrun\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) dev->type,dev->number);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) #ifdef GENERAL_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) if (istat & (IDT77105_ISTAT_HECERR | IDT77105_ISTAT_SCR |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) IDT77105_ISTAT_RSE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) /* normally don't care - just report in stats */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) printk(KERN_NOTICE "%s(itf %d): received cell with error\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) dev->type,dev->number);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) static int idt77105_start(struct atm_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) if (!(dev->phy_data = kmalloc(sizeof(struct idt77105_priv),GFP_KERNEL)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) PRIV(dev)->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) spin_lock_irqsave(&idt77105_priv_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) PRIV(dev)->next = idt77105_all;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) idt77105_all = PRIV(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) spin_unlock_irqrestore(&idt77105_priv_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) memset(&PRIV(dev)->stats,0,sizeof(struct idt77105_stats));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) /* initialise dev->signal from Good Signal Bit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) atm_dev_signal_change(dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) GET(ISTAT) & IDT77105_ISTAT_GOODSIG ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) ATM_PHY_SIG_FOUND : ATM_PHY_SIG_LOST);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) if (dev->signal == ATM_PHY_SIG_LOST)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) printk(KERN_WARNING "%s(itf %d): no signal\n",dev->type,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) dev->number);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) /* initialise loop mode from hardware */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) switch ( GET(DIAG) & IDT77105_DIAG_LCMASK ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) case IDT77105_DIAG_LC_NORMAL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) PRIV(dev)->loop_mode = ATM_LM_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) case IDT77105_DIAG_LC_PHY_LOOPBACK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) PRIV(dev)->loop_mode = ATM_LM_LOC_ATM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) case IDT77105_DIAG_LC_LINE_LOOPBACK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) PRIV(dev)->loop_mode = ATM_LM_RMT_ATM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) /* enable interrupts, e.g. on loss of signal */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) PRIV(dev)->old_mcr = GET(MCR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) if (dev->signal == ATM_PHY_SIG_FOUND) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) PRIV(dev)->old_mcr |= IDT77105_MCR_EIP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) PUT(PRIV(dev)->old_mcr, MCR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) idt77105_stats_timer_func(0); /* clear 77105 counters */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) (void) fetch_stats(dev,NULL,1); /* clear kernel counters */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) spin_lock_irqsave(&idt77105_priv_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) if (start_timer) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) start_timer = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) stats_timer.expires = jiffies+IDT77105_STATS_TIMER_PERIOD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) add_timer(&stats_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) restart_timer.expires = jiffies+IDT77105_RESTART_TIMER_PERIOD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) add_timer(&restart_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) spin_unlock_irqrestore(&idt77105_priv_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) static int idt77105_stop(struct atm_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) struct idt77105_priv *walk, *prev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) DPRINTK("%s(itf %d): stopping IDT77105\n",dev->type,dev->number);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) /* disable interrupts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) PUT( GET(MCR) & ~IDT77105_MCR_EIP, MCR );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) /* detach private struct from atm_dev & free */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) for (prev = NULL, walk = idt77105_all ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) walk != NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) prev = walk, walk = walk->next) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) if (walk->dev == dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) if (prev != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) prev->next = walk->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) idt77105_all = walk->next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) dev->phy = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) dev->phy_data = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) kfree(walk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) static const struct atmphy_ops idt77105_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) .start = idt77105_start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) .ioctl = idt77105_ioctl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) .interrupt = idt77105_int,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) .stop = idt77105_stop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) int idt77105_init(struct atm_dev *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) dev->phy = &idt77105_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) EXPORT_SYMBOL(idt77105_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) static void __exit idt77105_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) /* turn off timers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) del_timer_sync(&stats_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) del_timer_sync(&restart_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) module_exit(idt77105_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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