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kernel/drivers/isdn/hardware/mISDN/w6692.c

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// SPDX-License-Identifier: GPL-2.0-only
/*
* w6692.c mISDN driver for Winbond w6692 based cards
*
* Author Karsten Keil <kkeil@suse.de>
* based on the w6692 I4L driver from Petr Novak <petr.novak@i.cz>
*
* Copyright 2009 by Karsten Keil <keil@isdn4linux.de>
*/
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/mISDNhw.h>
#include <linux/slab.h>
#include "w6692.h"
#define W6692_REV "2.0"
#define DBUSY_TIMER_VALUE 80
enum {
W6692_ASUS,
W6692_WINBOND,
W6692_USR
};
/* private data in the PCI devices list */
struct w6692map {
u_int subtype;
char *name;
};
static const struct w6692map w6692_map[] =
{
{W6692_ASUS, "Dynalink/AsusCom IS64PH"},
{W6692_WINBOND, "Winbond W6692"},
{W6692_USR, "USR W6692"}
};
#define PCI_DEVICE_ID_USR_6692 0x3409
struct w6692_ch {
struct bchannel bch;
u32 addr;
struct timer_list timer;
u8 b_mode;
};
struct w6692_hw {
struct list_head list;
struct pci_dev *pdev;
char name[MISDN_MAX_IDLEN];
u32 irq;
u32 irqcnt;
u32 addr;
u32 fmask; /* feature mask - bit set per card nr */
int subtype;
spinlock_t lock; /* hw lock */
u8 imask;
u8 pctl;
u8 xaddr;
u8 xdata;
u8 state;
struct w6692_ch bc[2];
struct dchannel dch;
char log[64];
};
static LIST_HEAD(Cards);
static DEFINE_RWLOCK(card_lock); /* protect Cards */
static int w6692_cnt;
static int debug;
static u32 led;
static u32 pots;
static void
_set_debug(struct w6692_hw *card)
{
card->dch.debug = debug;
card->bc[0].bch.debug = debug;
card->bc[1].bch.debug = debug;
}
static int
set_debug(const char *val, const struct kernel_param *kp)
{
int ret;
struct w6692_hw *card;
ret = param_set_uint(val, kp);
if (!ret) {
read_lock(&card_lock);
list_for_each_entry(card, &Cards, list)
_set_debug(card);
read_unlock(&card_lock);
}
return ret;
}
MODULE_AUTHOR("Karsten Keil");
MODULE_LICENSE("GPL v2");
MODULE_VERSION(W6692_REV);
module_param_call(debug, set_debug, param_get_uint, &debug, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "W6692 debug mask");
module_param(led, uint, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(led, "W6692 LED support bitmask (one bit per card)");
module_param(pots, uint, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(pots, "W6692 POTS support bitmask (one bit per card)");
static inline u8
ReadW6692(struct w6692_hw *card, u8 offset)
{
return inb(card->addr + offset);
}
static inline void
WriteW6692(struct w6692_hw *card, u8 offset, u8 value)
{
outb(value, card->addr + offset);
}
static inline u8
ReadW6692B(struct w6692_ch *bc, u8 offset)
{
return inb(bc->addr + offset);
}
static inline void
WriteW6692B(struct w6692_ch *bc, u8 offset, u8 value)
{
outb(value, bc->addr + offset);
}
static void
enable_hwirq(struct w6692_hw *card)
{
WriteW6692(card, W_IMASK, card->imask);
}
static void
disable_hwirq(struct w6692_hw *card)
{
WriteW6692(card, W_IMASK, 0xff);
}
static const char *W6692Ver[] = {"V00", "V01", "V10", "V11"};
static void
W6692Version(struct w6692_hw *card)
{
int val;
val = ReadW6692(card, W_D_RBCH);
pr_notice("%s: Winbond W6692 version: %s\n", card->name,
W6692Ver[(val >> 6) & 3]);
}
static void
w6692_led_handler(struct w6692_hw *card, int on)
{
if ((!(card->fmask & led)) || card->subtype == W6692_USR)
return;
if (on) {
card->xdata &= 0xfb; /* LED ON */
WriteW6692(card, W_XDATA, card->xdata);
} else {
card->xdata |= 0x04; /* LED OFF */
WriteW6692(card, W_XDATA, card->xdata);
}
}
static void
ph_command(struct w6692_hw *card, u8 cmd)
{
pr_debug("%s: ph_command %x\n", card->name, cmd);
WriteW6692(card, W_CIX, cmd);
}
static void
W6692_new_ph(struct w6692_hw *card)
{
if (card->state == W_L1CMD_RST)
ph_command(card, W_L1CMD_DRC);
schedule_event(&card->dch, FLG_PHCHANGE);
}
static void
W6692_ph_bh(struct dchannel *dch)
{
struct w6692_hw *card = dch->hw;
switch (card->state) {
case W_L1CMD_RST:
dch->state = 0;
l1_event(dch->l1, HW_RESET_IND);
break;
case W_L1IND_CD:
dch->state = 3;
l1_event(dch->l1, HW_DEACT_CNF);
break;
case W_L1IND_DRD:
dch->state = 3;
l1_event(dch->l1, HW_DEACT_IND);
break;
case W_L1IND_CE:
dch->state = 4;
l1_event(dch->l1, HW_POWERUP_IND);
break;
case W_L1IND_LD:
if (dch->state <= 5) {
dch->state = 5;
l1_event(dch->l1, ANYSIGNAL);
} else {
dch->state = 8;
l1_event(dch->l1, LOSTFRAMING);
}
break;
case W_L1IND_ARD:
dch->state = 6;
l1_event(dch->l1, INFO2);
break;
case W_L1IND_AI8:
dch->state = 7;
l1_event(dch->l1, INFO4_P8);
break;
case W_L1IND_AI10:
dch->state = 7;
l1_event(dch->l1, INFO4_P10);
break;
default:
pr_debug("%s: TE unknown state %02x dch state %02x\n",
card->name, card->state, dch->state);
break;
}
pr_debug("%s: TE newstate %02x\n", card->name, dch->state);
}
static void
W6692_empty_Dfifo(struct w6692_hw *card, int count)
{
struct dchannel *dch = &card->dch;
u8 *ptr;
pr_debug("%s: empty_Dfifo %d\n", card->name, count);
if (!dch->rx_skb) {
dch->rx_skb = mI_alloc_skb(card->dch.maxlen, GFP_ATOMIC);
if (!dch->rx_skb) {
pr_info("%s: D receive out of memory\n", card->name);
WriteW6692(card, W_D_CMDR, W_D_CMDR_RACK);
return;
}
}
if ((dch->rx_skb->len + count) >= dch->maxlen) {
pr_debug("%s: empty_Dfifo overrun %d\n", card->name,
dch->rx_skb->len + count);
WriteW6692(card, W_D_CMDR, W_D_CMDR_RACK);
return;
}
ptr = skb_put(dch->rx_skb, count);
insb(card->addr + W_D_RFIFO, ptr, count);
WriteW6692(card, W_D_CMDR, W_D_CMDR_RACK);
if (debug & DEBUG_HW_DFIFO) {
snprintf(card->log, 63, "D-recv %s %d ",
card->name, count);
print_hex_dump_bytes(card->log, DUMP_PREFIX_OFFSET, ptr, count);
}
}
static void
W6692_fill_Dfifo(struct w6692_hw *card)
{
struct dchannel *dch = &card->dch;
int count;
u8 *ptr;
u8 cmd = W_D_CMDR_XMS;
pr_debug("%s: fill_Dfifo\n", card->name);
if (!dch->tx_skb)
return;
count = dch->tx_skb->len - dch->tx_idx;
if (count <= 0)
return;
if (count > W_D_FIFO_THRESH)
count = W_D_FIFO_THRESH;
else
cmd |= W_D_CMDR_XME;
ptr = dch->tx_skb->data + dch->tx_idx;
dch->tx_idx += count;
outsb(card->addr + W_D_XFIFO, ptr, count);
WriteW6692(card, W_D_CMDR, cmd);
if (test_and_set_bit(FLG_BUSY_TIMER, &dch->Flags)) {
pr_debug("%s: fill_Dfifo dbusytimer running\n", card->name);
del_timer(&dch->timer);
}
dch->timer.expires = jiffies + ((DBUSY_TIMER_VALUE * HZ) / 1000);
add_timer(&dch->timer);
if (debug & DEBUG_HW_DFIFO) {
snprintf(card->log, 63, "D-send %s %d ",
card->name, count);
print_hex_dump_bytes(card->log, DUMP_PREFIX_OFFSET, ptr, count);
}
}
static void
d_retransmit(struct w6692_hw *card)
{
struct dchannel *dch = &card->dch;
if (test_and_clear_bit(FLG_BUSY_TIMER, &dch->Flags))
del_timer(&dch->timer);
#ifdef FIXME
if (test_and_clear_bit(FLG_L1_BUSY, &dch->Flags))
dchannel_sched_event(dch, D_CLEARBUSY);
#endif
if (test_bit(FLG_TX_BUSY, &dch->Flags)) {
/* Restart frame */
dch->tx_idx = 0;
W6692_fill_Dfifo(card);
} else if (dch->tx_skb) { /* should not happen */
pr_info("%s: %s without TX_BUSY\n", card->name, __func__);
test_and_set_bit(FLG_TX_BUSY, &dch->Flags);
dch->tx_idx = 0;
W6692_fill_Dfifo(card);
} else {
pr_info("%s: XDU no TX_BUSY\n", card->name);
if (get_next_dframe(dch))
W6692_fill_Dfifo(card);
}
}
static void
handle_rxD(struct w6692_hw *card) {
u8 stat;
int count;
stat = ReadW6692(card, W_D_RSTA);
if (stat & (W_D_RSTA_RDOV | W_D_RSTA_CRCE | W_D_RSTA_RMB)) {
if (stat & W_D_RSTA_RDOV) {
pr_debug("%s: D-channel RDOV\n", card->name);
#ifdef ERROR_STATISTIC
card->dch.err_rx++;
#endif
}
if (stat & W_D_RSTA_CRCE) {
pr_debug("%s: D-channel CRC error\n", card->name);
#ifdef ERROR_STATISTIC
card->dch.err_crc++;
#endif
}
if (stat & W_D_RSTA_RMB) {
pr_debug("%s: D-channel ABORT\n", card->name);
#ifdef ERROR_STATISTIC
card->dch.err_rx++;
#endif
}
dev_kfree_skb(card->dch.rx_skb);
card->dch.rx_skb = NULL;
WriteW6692(card, W_D_CMDR, W_D_CMDR_RACK | W_D_CMDR_RRST);
} else {
count = ReadW6692(card, W_D_RBCL) & (W_D_FIFO_THRESH - 1);
if (count == 0)
count = W_D_FIFO_THRESH;
W6692_empty_Dfifo(card, count);
recv_Dchannel(&card->dch);
}
}
static void
handle_txD(struct w6692_hw *card) {
if (test_and_clear_bit(FLG_BUSY_TIMER, &card->dch.Flags))
del_timer(&card->dch.timer);
if (card->dch.tx_skb && card->dch.tx_idx < card->dch.tx_skb->len) {
W6692_fill_Dfifo(card);
} else {
dev_kfree_skb(card->dch.tx_skb);
if (get_next_dframe(&card->dch))
W6692_fill_Dfifo(card);
}
}
static void
handle_statusD(struct w6692_hw *card)
{
struct dchannel *dch = &card->dch;
u8 exval, v1, cir;
exval = ReadW6692(card, W_D_EXIR);
pr_debug("%s: D_EXIR %02x\n", card->name, exval);
if (exval & (W_D_EXI_XDUN | W_D_EXI_XCOL)) {
/* Transmit underrun/collision */
pr_debug("%s: D-channel underrun/collision\n", card->name);
#ifdef ERROR_STATISTIC
dch->err_tx++;
#endif
d_retransmit(card);
}
if (exval & W_D_EXI_RDOV) { /* RDOV */
pr_debug("%s: D-channel RDOV\n", card->name);
WriteW6692(card, W_D_CMDR, W_D_CMDR_RRST);
}
if (exval & W_D_EXI_TIN2) /* TIN2 - never */
pr_debug("%s: spurious TIN2 interrupt\n", card->name);
if (exval & W_D_EXI_MOC) { /* MOC - not supported */
v1 = ReadW6692(card, W_MOSR);
pr_debug("%s: spurious MOC interrupt MOSR %02x\n",
card->name, v1);
}
if (exval & W_D_EXI_ISC) { /* ISC - Level1 change */
cir = ReadW6692(card, W_CIR);
pr_debug("%s: ISC CIR %02X\n", card->name, cir);
if (cir & W_CIR_ICC) {
v1 = cir & W_CIR_COD_MASK;
pr_debug("%s: ph_state_change %x -> %x\n", card->name,
dch->state, v1);
card->state = v1;
if (card->fmask & led) {
switch (v1) {
case W_L1IND_AI8:
case W_L1IND_AI10:
w6692_led_handler(card, 1);
break;
default:
w6692_led_handler(card, 0);
break;
}
}
W6692_new_ph(card);
}
if (cir & W_CIR_SCC) {
v1 = ReadW6692(card, W_SQR);
pr_debug("%s: SCC SQR %02X\n", card->name, v1);
}
}
if (exval & W_D_EXI_WEXP)
pr_debug("%s: spurious WEXP interrupt!\n", card->name);
if (exval & W_D_EXI_TEXP)
pr_debug("%s: spurious TEXP interrupt!\n", card->name);
}
static void
W6692_empty_Bfifo(struct w6692_ch *wch, int count)
{
struct w6692_hw *card = wch->bch.hw;
u8 *ptr;
int maxlen;
pr_debug("%s: empty_Bfifo %d\n", card->name, count);
if (unlikely(wch->bch.state == ISDN_P_NONE)) {
pr_debug("%s: empty_Bfifo ISDN_P_NONE\n", card->name);
WriteW6692B(wch, W_B_CMDR, W_B_CMDR_RACK | W_B_CMDR_RACT);
if (wch->bch.rx_skb)
skb_trim(wch->bch.rx_skb, 0);
return;
}
if (test_bit(FLG_RX_OFF, &wch->bch.Flags)) {
wch->bch.dropcnt += count;
WriteW6692B(wch, W_B_CMDR, W_B_CMDR_RACK | W_B_CMDR_RACT);
return;
}
maxlen = bchannel_get_rxbuf(&wch->bch, count);
if (maxlen < 0) {
WriteW6692B(wch, W_B_CMDR, W_B_CMDR_RACK | W_B_CMDR_RACT);
if (wch->bch.rx_skb)
skb_trim(wch->bch.rx_skb, 0);
pr_warn("%s.B%d: No bufferspace for %d bytes\n",
card->name, wch->bch.nr, count);
return;
}
ptr = skb_put(wch->bch.rx_skb, count);
insb(wch->addr + W_B_RFIFO, ptr, count);
WriteW6692B(wch, W_B_CMDR, W_B_CMDR_RACK | W_B_CMDR_RACT);
if (debug & DEBUG_HW_DFIFO) {
snprintf(card->log, 63, "B%1d-recv %s %d ",
wch->bch.nr, card->name, count);
print_hex_dump_bytes(card->log, DUMP_PREFIX_OFFSET, ptr, count);
}
}
static void
W6692_fill_Bfifo(struct w6692_ch *wch)
{
struct w6692_hw *card = wch->bch.hw;
int count, fillempty = 0;
u8 *ptr, cmd = W_B_CMDR_RACT | W_B_CMDR_XMS;
pr_debug("%s: fill Bfifo\n", card->name);
if (!wch->bch.tx_skb) {
if (!test_bit(FLG_TX_EMPTY, &wch->bch.Flags))
return;
ptr = wch->bch.fill;
count = W_B_FIFO_THRESH;
fillempty = 1;
} else {
count = wch->bch.tx_skb->len - wch->bch.tx_idx;
if (count <= 0)
return;
ptr = wch->bch.tx_skb->data + wch->bch.tx_idx;
}
if (count > W_B_FIFO_THRESH)
count = W_B_FIFO_THRESH;
else if (test_bit(FLG_HDLC, &wch->bch.Flags))
cmd |= W_B_CMDR_XME;
pr_debug("%s: fill Bfifo%d/%d\n", card->name,
count, wch->bch.tx_idx);
wch->bch.tx_idx += count;
if (fillempty) {
while (count > 0) {
outsb(wch->addr + W_B_XFIFO, ptr, MISDN_BCH_FILL_SIZE);
count -= MISDN_BCH_FILL_SIZE;
}
} else {
outsb(wch->addr + W_B_XFIFO, ptr, count);
}
WriteW6692B(wch, W_B_CMDR, cmd);
if ((debug & DEBUG_HW_BFIFO) && !fillempty) {
snprintf(card->log, 63, "B%1d-send %s %d ",
wch->bch.nr, card->name, count);
print_hex_dump_bytes(card->log, DUMP_PREFIX_OFFSET, ptr, count);
}
}
#if 0
static int
setvolume(struct w6692_ch *wch, int mic, struct sk_buff *skb)
{
struct w6692_hw *card = wch->bch.hw;
u16 *vol = (u16 *)skb->data;
u8 val;
if ((!(card->fmask & pots)) ||
!test_bit(FLG_TRANSPARENT, &wch->bch.Flags))
return -ENODEV;
if (skb->len < 2)
return -EINVAL;
if (*vol > 7)
return -EINVAL;
val = *vol & 7;
val = 7 - val;
if (mic) {
val <<= 3;
card->xaddr &= 0xc7;
} else {
card->xaddr &= 0xf8;
}
card->xaddr |= val;
WriteW6692(card, W_XADDR, card->xaddr);
return 0;
}
static int
enable_pots(struct w6692_ch *wch)
{
struct w6692_hw *card = wch->bch.hw;
if ((!(card->fmask & pots)) ||
!test_bit(FLG_TRANSPARENT, &wch->bch.Flags))
return -ENODEV;
wch->b_mode |= W_B_MODE_EPCM | W_B_MODE_BSW0;
WriteW6692B(wch, W_B_MODE, wch->b_mode);
WriteW6692B(wch, W_B_CMDR, W_B_CMDR_RRST | W_B_CMDR_XRST);
card->pctl |= ((wch->bch.nr & 2) ? W_PCTL_PCX : 0);
WriteW6692(card, W_PCTL, card->pctl);
return 0;
}
#endif
static int
disable_pots(struct w6692_ch *wch)
{
struct w6692_hw *card = wch->bch.hw;
if (!(card->fmask & pots))
return -ENODEV;
wch->b_mode &= ~(W_B_MODE_EPCM | W_B_MODE_BSW0);
WriteW6692B(wch, W_B_MODE, wch->b_mode);
WriteW6692B(wch, W_B_CMDR, W_B_CMDR_RRST | W_B_CMDR_RACT |
W_B_CMDR_XRST);
return 0;
}
static int
w6692_mode(struct w6692_ch *wch, u32 pr)
{
struct w6692_hw *card;
card = wch->bch.hw;
pr_debug("%s: B%d protocol %x-->%x\n", card->name,
wch->bch.nr, wch->bch.state, pr);
switch (pr) {
case ISDN_P_NONE:
if ((card->fmask & pots) && (wch->b_mode & W_B_MODE_EPCM))
disable_pots(wch);
wch->b_mode = 0;
mISDN_clear_bchannel(&wch->bch);
WriteW6692B(wch, W_B_MODE, wch->b_mode);
WriteW6692B(wch, W_B_CMDR, W_B_CMDR_RRST | W_B_CMDR_XRST);
test_and_clear_bit(FLG_HDLC, &wch->bch.Flags);
test_and_clear_bit(FLG_TRANSPARENT, &wch->bch.Flags);
break;
case ISDN_P_B_RAW:
wch->b_mode = W_B_MODE_MMS;
WriteW6692B(wch, W_B_MODE, wch->b_mode);
WriteW6692B(wch, W_B_EXIM, 0);
WriteW6692B(wch, W_B_CMDR, W_B_CMDR_RRST | W_B_CMDR_RACT |
W_B_CMDR_XRST);
test_and_set_bit(FLG_TRANSPARENT, &wch->bch.Flags);
break;
case ISDN_P_B_HDLC:
wch->b_mode = W_B_MODE_ITF;
WriteW6692B(wch, W_B_MODE, wch->b_mode);
WriteW6692B(wch, W_B_ADM1, 0xff);
WriteW6692B(wch, W_B_ADM2, 0xff);
WriteW6692B(wch, W_B_EXIM, 0);
WriteW6692B(wch, W_B_CMDR, W_B_CMDR_RRST | W_B_CMDR_RACT |
W_B_CMDR_XRST);
test_and_set_bit(FLG_HDLC, &wch->bch.Flags);
break;
default:
pr_info("%s: protocol %x not known\n", card->name, pr);
return -ENOPROTOOPT;
}
wch->bch.state = pr;
return 0;
}
static void
send_next(struct w6692_ch *wch)
{
if (wch->bch.tx_skb && wch->bch.tx_idx < wch->bch.tx_skb->len) {
W6692_fill_Bfifo(wch);
} else {
dev_kfree_skb(wch->bch.tx_skb);
if (get_next_bframe(&wch->bch)) {
W6692_fill_Bfifo(wch);
test_and_clear_bit(FLG_TX_EMPTY, &wch->bch.Flags);
} else if (test_bit(FLG_TX_EMPTY, &wch->bch.Flags)) {
W6692_fill_Bfifo(wch);
}
}
}
static void
W6692B_interrupt(struct w6692_hw *card, int ch)
{
struct w6692_ch *wch = &card->bc[ch];
int count;
u8 stat, star = 0;
stat = ReadW6692B(wch, W_B_EXIR);
pr_debug("%s: B%d EXIR %02x\n", card->name, wch->bch.nr, stat);
if (stat & W_B_EXI_RME) {
star = ReadW6692B(wch, W_B_STAR);
if (star & (W_B_STAR_RDOV | W_B_STAR_CRCE | W_B_STAR_RMB)) {
if ((star & W_B_STAR_RDOV) &&
test_bit(FLG_ACTIVE, &wch->bch.Flags)) {
pr_debug("%s: B%d RDOV proto=%x\n", card->name,
wch->bch.nr, wch->bch.state);
#ifdef ERROR_STATISTIC
wch->bch.err_rdo++;
#endif
}
if (test_bit(FLG_HDLC, &wch->bch.Flags)) {
if (star & W_B_STAR_CRCE) {
pr_debug("%s: B%d CRC error\n",
card->name, wch->bch.nr);
#ifdef ERROR_STATISTIC
wch->bch.err_crc++;
#endif
}
if (star & W_B_STAR_RMB) {
pr_debug("%s: B%d message abort\n",
card->name, wch->bch.nr);
#ifdef ERROR_STATISTIC
wch->bch.err_inv++;
#endif
}
}
WriteW6692B(wch, W_B_CMDR, W_B_CMDR_RACK |
W_B_CMDR_RRST | W_B_CMDR_RACT);
if (wch->bch.rx_skb)
skb_trim(wch->bch.rx_skb, 0);
} else {
count = ReadW6692B(wch, W_B_RBCL) &
(W_B_FIFO_THRESH - 1);
if (count == 0)
count = W_B_FIFO_THRESH;
W6692_empty_Bfifo(wch, count);
recv_Bchannel(&wch->bch, 0, false);
}
}
if (stat & W_B_EXI_RMR) {
if (!(stat & W_B_EXI_RME))
star = ReadW6692B(wch, W_B_STAR);
if (star & W_B_STAR_RDOV) {
pr_debug("%s: B%d RDOV proto=%x\n", card->name,
wch->bch.nr, wch->bch.state);
#ifdef ERROR_STATISTIC
wch->bch.err_rdo++;
#endif
WriteW6692B(wch, W_B_CMDR, W_B_CMDR_RACK |
W_B_CMDR_RRST | W_B_CMDR_RACT);
} else {
W6692_empty_Bfifo(wch, W_B_FIFO_THRESH);
if (test_bit(FLG_TRANSPARENT, &wch->bch.Flags))
recv_Bchannel(&wch->bch, 0, false);
}
}
if (stat & W_B_EXI_RDOV) {
/* only if it is not handled yet */
if (!(star & W_B_STAR_RDOV)) {
pr_debug("%s: B%d RDOV IRQ proto=%x\n", card->name,
wch->bch.nr, wch->bch.state);
#ifdef ERROR_STATISTIC
wch->bch.err_rdo++;
#endif
WriteW6692B(wch, W_B_CMDR, W_B_CMDR_RACK |
W_B_CMDR_RRST | W_B_CMDR_RACT);
}
}
if (stat & W_B_EXI_XFR) {
if (!(stat & (W_B_EXI_RME | W_B_EXI_RMR))) {
star = ReadW6692B(wch, W_B_STAR);
pr_debug("%s: B%d star %02x\n", card->name,
wch->bch.nr, star);
}
if (star & W_B_STAR_XDOW) {
pr_warn("%s: B%d XDOW proto=%x\n", card->name,
wch->bch.nr, wch->bch.state);
#ifdef ERROR_STATISTIC
wch->bch.err_xdu++;
#endif
WriteW6692B(wch, W_B_CMDR, W_B_CMDR_XRST |
W_B_CMDR_RACT);
/* resend */
if (wch->bch.tx_skb) {
if (!test_bit(FLG_TRANSPARENT, &wch->bch.Flags))
wch->bch.tx_idx = 0;
}
}
send_next(wch);
if (star & W_B_STAR_XDOW)
return; /* handle XDOW only once */
}
if (stat & W_B_EXI_XDUN) {
pr_warn("%s: B%d XDUN proto=%x\n", card->name,
wch->bch.nr, wch->bch.state);
#ifdef ERROR_STATISTIC
wch->bch.err_xdu++;
#endif
/* resend - no XRST needed */
if (wch->bch.tx_skb) {
if (!test_bit(FLG_TRANSPARENT, &wch->bch.Flags))
wch->bch.tx_idx = 0;
} else if (test_bit(FLG_FILLEMPTY, &wch->bch.Flags)) {
test_and_set_bit(FLG_TX_EMPTY, &wch->bch.Flags);
}
send_next(wch);
}
}
static irqreturn_t
w6692_irq(int intno, void *dev_id)
{
struct w6692_hw *card = dev_id;
u8 ista;
spin_lock(&card->lock);
ista = ReadW6692(card, W_ISTA);
if ((ista | card->imask) == card->imask) {
/* possible a shared IRQ reqest */
spin_unlock(&card->lock);
return IRQ_NONE;
}
card->irqcnt++;
pr_debug("%s: ista %02x\n", card->name, ista);
ista &= ~card->imask;
if (ista & W_INT_B1_EXI)
W6692B_interrupt(card, 0);
if (ista & W_INT_B2_EXI)
W6692B_interrupt(card, 1);
if (ista & W_INT_D_RME)
handle_rxD(card);
if (ista & W_INT_D_RMR)
W6692_empty_Dfifo(card, W_D_FIFO_THRESH);
if (ista & W_INT_D_XFR)
handle_txD(card);
if (ista & W_INT_D_EXI)
handle_statusD(card);
if (ista & (W_INT_XINT0 | W_INT_XINT1)) /* XINT0/1 - never */
pr_debug("%s: W6692 spurious XINT!\n", card->name);
/* End IRQ Handler */
spin_unlock(&card->lock);
return IRQ_HANDLED;
}
static void
dbusy_timer_handler(struct timer_list *t)
{
struct dchannel *dch = from_timer(dch, t, timer);
struct w6692_hw *card = dch->hw;
int rbch, star;
u_long flags;
if (test_bit(FLG_BUSY_TIMER, &dch->Flags)) {
spin_lock_irqsave(&card->lock, flags);
rbch = ReadW6692(card, W_D_RBCH);
star = ReadW6692(card, W_D_STAR);
pr_debug("%s: D-Channel Busy RBCH %02x STAR %02x\n",
card->name, rbch, star);
if (star & W_D_STAR_XBZ) /* D-Channel Busy */
test_and_set_bit(FLG_L1_BUSY, &dch->Flags);
else {
/* discard frame; reset transceiver */
test_and_clear_bit(FLG_BUSY_TIMER, &dch->Flags);
if (dch->tx_idx)
dch->tx_idx = 0;
else
pr_info("%s: W6692 D-Channel Busy no tx_idx\n",
card->name);
/* Transmitter reset */
WriteW6692(card, W_D_CMDR, W_D_CMDR_XRST);
}
spin_unlock_irqrestore(&card->lock, flags);
}
}
static void initW6692(struct w6692_hw *card)
{
u8 val;
timer_setup(&card->dch.timer, dbusy_timer_handler, 0);
w6692_mode(&card->bc[0], ISDN_P_NONE);
w6692_mode(&card->bc[1], ISDN_P_NONE);
WriteW6692(card, W_D_CTL, 0x00);
disable_hwirq(card);
WriteW6692(card, W_D_SAM, 0xff);
WriteW6692(card, W_D_TAM, 0xff);
WriteW6692(card, W_D_MODE, W_D_MODE_RACT);
card->state = W_L1CMD_RST;
ph_command(card, W_L1CMD_RST);
ph_command(card, W_L1CMD_ECK);
/* enable all IRQ but extern */
card->imask = 0x18;
WriteW6692(card, W_D_EXIM, 0x00);
WriteW6692B(&card->bc[0], W_B_EXIM, 0);
WriteW6692B(&card->bc[1], W_B_EXIM, 0);
/* Reset D-chan receiver and transmitter */
WriteW6692(card, W_D_CMDR, W_D_CMDR_RRST | W_D_CMDR_XRST);
/* Reset B-chan receiver and transmitter */
WriteW6692B(&card->bc[0], W_B_CMDR, W_B_CMDR_RRST | W_B_CMDR_XRST);
WriteW6692B(&card->bc[1], W_B_CMDR, W_B_CMDR_RRST | W_B_CMDR_XRST);
/* enable peripheral */
if (card->subtype == W6692_USR) {
/* seems that USR implemented some power control features
* Pin 79 is connected to the oscilator circuit so we
* have to handle it here
*/
card->pctl = 0x80;
card->xdata = 0;
WriteW6692(card, W_PCTL, card->pctl);
WriteW6692(card, W_XDATA, card->xdata);
} else {
card->pctl = W_PCTL_OE5 | W_PCTL_OE4 | W_PCTL_OE2 |
W_PCTL_OE1 | W_PCTL_OE0;
card->xaddr = 0x00;/* all sw off */
if (card->fmask & pots)
card->xdata |= 0x06; /* POWER UP/ LED OFF / ALAW */
if (card->fmask & led)
card->xdata |= 0x04; /* LED OFF */
if ((card->fmask & pots) || (card->fmask & led)) {
WriteW6692(card, W_PCTL, card->pctl);
WriteW6692(card, W_XADDR, card->xaddr);
WriteW6692(card, W_XDATA, card->xdata);
val = ReadW6692(card, W_XADDR);
if (debug & DEBUG_HW)
pr_notice("%s: W_XADDR=%02x\n",
card->name, val);
}
}
}
static void
reset_w6692(struct w6692_hw *card)
{
WriteW6692(card, W_D_CTL, W_D_CTL_SRST);
mdelay(10);
WriteW6692(card, W_D_CTL, 0);
}
static int
init_card(struct w6692_hw *card)
{
int cnt = 3;
u_long flags;
spin_lock_irqsave(&card->lock, flags);
disable_hwirq(card);
spin_unlock_irqrestore(&card->lock, flags);
if (request_irq(card->irq, w6692_irq, IRQF_SHARED, card->name, card)) {
pr_info("%s: couldn't get interrupt %d\n", card->name,
card->irq);
return -EIO;
}
while (cnt--) {
spin_lock_irqsave(&card->lock, flags);
initW6692(card);
enable_hwirq(card);
spin_unlock_irqrestore(&card->lock, flags);
/* Timeout 10ms */
msleep_interruptible(10);
if (debug & DEBUG_HW)
pr_notice("%s: IRQ %d count %d\n", card->name,
card->irq, card->irqcnt);
if (!card->irqcnt) {
pr_info("%s: IRQ(%d) getting no IRQs during init %d\n",
card->name, card->irq, 3 - cnt);
reset_w6692(card);
} else
return 0;
}
free_irq(card->irq, card);
return -EIO;
}
static int
w6692_l2l1B(struct mISDNchannel *ch, struct sk_buff *skb)
{
struct bchannel *bch = container_of(ch, struct bchannel, ch);
struct w6692_ch *bc = container_of(bch, struct w6692_ch, bch);
struct w6692_hw *card = bch->hw;
int ret = -EINVAL;
struct mISDNhead *hh = mISDN_HEAD_P(skb);
unsigned long flags;
switch (hh->prim) {
case PH_DATA_REQ:
spin_lock_irqsave(&card->lock, flags);
ret = bchannel_senddata(bch, skb);
if (ret > 0) { /* direct TX */
ret = 0;
W6692_fill_Bfifo(bc);
}
spin_unlock_irqrestore(&card->lock, flags);
return ret;
case PH_ACTIVATE_REQ:
spin_lock_irqsave(&card->lock, flags);
if (!test_and_set_bit(FLG_ACTIVE, &bch->Flags))
ret = w6692_mode(bc, ch->protocol);
else
ret = 0;
spin_unlock_irqrestore(&card->lock, flags);
if (!ret)
_queue_data(ch, PH_ACTIVATE_IND, MISDN_ID_ANY, 0,
NULL, GFP_KERNEL);
break;
case PH_DEACTIVATE_REQ:
spin_lock_irqsave(&card->lock, flags);
mISDN_clear_bchannel(bch);
w6692_mode(bc, ISDN_P_NONE);
spin_unlock_irqrestore(&card->lock, flags);
_queue_data(ch, PH_DEACTIVATE_IND, MISDN_ID_ANY, 0,
NULL, GFP_KERNEL);
ret = 0;
break;
default:
pr_info("%s: %s unknown prim(%x,%x)\n",
card->name, __func__, hh->prim, hh->id);
ret = -EINVAL;
}
if (!ret)
dev_kfree_skb(skb);
return ret;
}
static int
channel_bctrl(struct bchannel *bch, struct mISDN_ctrl_req *cq)
{
return mISDN_ctrl_bchannel(bch, cq);
}
static int
open_bchannel(struct w6692_hw *card, struct channel_req *rq)
{
struct bchannel *bch;
if (rq->adr.channel == 0 || rq->adr.channel > 2)
return -EINVAL;
if (rq->protocol == ISDN_P_NONE)
return -EINVAL;
bch = &card->bc[rq->adr.channel - 1].bch;
if (test_and_set_bit(FLG_OPEN, &bch->Flags))
return -EBUSY; /* b-channel can be only open once */
bch->ch.protocol = rq->protocol;
rq->ch = &bch->ch;
return 0;
}
static int
channel_ctrl(struct w6692_hw *card, struct mISDN_ctrl_req *cq)
{
int ret = 0;
switch (cq->op) {
case MISDN_CTRL_GETOP:
cq->op = MISDN_CTRL_L1_TIMER3;
break;
case MISDN_CTRL_L1_TIMER3:
ret = l1_event(card->dch.l1, HW_TIMER3_VALUE | (cq->p1 & 0xff));
break;
default:
pr_info("%s: unknown CTRL OP %x\n", card->name, cq->op);
ret = -EINVAL;
break;
}
return ret;
}
static int
w6692_bctrl(struct mISDNchannel *ch, u32 cmd, void *arg)
{
struct bchannel *bch = container_of(ch, struct bchannel, ch);
struct w6692_ch *bc = container_of(bch, struct w6692_ch, bch);
struct w6692_hw *card = bch->hw;
int ret = -EINVAL;
u_long flags;
pr_debug("%s: %s cmd:%x %p\n", card->name, __func__, cmd, arg);
switch (cmd) {
case CLOSE_CHANNEL:
test_and_clear_bit(FLG_OPEN, &bch->Flags);
cancel_work_sync(&bch->workq);
spin_lock_irqsave(&card->lock, flags);
mISDN_clear_bchannel(bch);
w6692_mode(bc, ISDN_P_NONE);
spin_unlock_irqrestore(&card->lock, flags);
ch->protocol = ISDN_P_NONE;
ch->peer = NULL;
module_put(THIS_MODULE);
ret = 0;
break;
case CONTROL_CHANNEL:
ret = channel_bctrl(bch, arg);
break;
default:
pr_info("%s: %s unknown prim(%x)\n",
card->name, __func__, cmd);
}
return ret;
}
static int
w6692_l2l1D(struct mISDNchannel *ch, struct sk_buff *skb)
{
struct mISDNdevice *dev = container_of(ch, struct mISDNdevice, D);
struct dchannel *dch = container_of(dev, struct dchannel, dev);
struct w6692_hw *card = container_of(dch, struct w6692_hw, dch);
int ret = -EINVAL;
struct mISDNhead *hh = mISDN_HEAD_P(skb);
u32 id;
u_long flags;
switch (hh->prim) {
case PH_DATA_REQ:
spin_lock_irqsave(&card->lock, flags);
ret = dchannel_senddata(dch, skb);
if (ret > 0) { /* direct TX */
id = hh->id; /* skb can be freed */
W6692_fill_Dfifo(card);
ret = 0;
spin_unlock_irqrestore(&card->lock, flags);
queue_ch_frame(ch, PH_DATA_CNF, id, NULL);
} else
spin_unlock_irqrestore(&card->lock, flags);
return ret;
case PH_ACTIVATE_REQ:
ret = l1_event(dch->l1, hh->prim);
break;
case PH_DEACTIVATE_REQ:
test_and_clear_bit(FLG_L2_ACTIVATED, &dch->Flags);
ret = l1_event(dch->l1, hh->prim);
break;
}
if (!ret)
dev_kfree_skb(skb);
return ret;
}
static int
w6692_l1callback(struct dchannel *dch, u32 cmd)
{
struct w6692_hw *card = container_of(dch, struct w6692_hw, dch);
u_long flags;
pr_debug("%s: cmd(%x) state(%02x)\n", card->name, cmd, card->state);
switch (cmd) {
case INFO3_P8:
spin_lock_irqsave(&card->lock, flags);
ph_command(card, W_L1CMD_AR8);
spin_unlock_irqrestore(&card->lock, flags);
break;
case INFO3_P10:
spin_lock_irqsave(&card->lock, flags);
ph_command(card, W_L1CMD_AR10);
spin_unlock_irqrestore(&card->lock, flags);
break;
case HW_RESET_REQ:
spin_lock_irqsave(&card->lock, flags);
if (card->state != W_L1IND_DRD)
ph_command(card, W_L1CMD_RST);
ph_command(card, W_L1CMD_ECK);
spin_unlock_irqrestore(&card->lock, flags);
break;
case HW_DEACT_REQ:
skb_queue_purge(&dch->squeue);
if (dch->tx_skb) {
dev_kfree_skb(dch->tx_skb);
dch->tx_skb = NULL;
}
dch->tx_idx = 0;
if (dch->rx_skb) {
dev_kfree_skb(dch->rx_skb);
dch->rx_skb = NULL;
}
test_and_clear_bit(FLG_TX_BUSY, &dch->Flags);
if (test_and_clear_bit(FLG_BUSY_TIMER, &dch->Flags))
del_timer(&dch->timer);
break;
case HW_POWERUP_REQ:
spin_lock_irqsave(&card->lock, flags);
ph_command(card, W_L1CMD_ECK);
spin_unlock_irqrestore(&card->lock, flags);
break;
case PH_ACTIVATE_IND:
test_and_set_bit(FLG_ACTIVE, &dch->Flags);
_queue_data(&dch->dev.D, cmd, MISDN_ID_ANY, 0, NULL,
GFP_ATOMIC);
break;
case PH_DEACTIVATE_IND:
test_and_clear_bit(FLG_ACTIVE, &dch->Flags);
_queue_data(&dch->dev.D, cmd, MISDN_ID_ANY, 0, NULL,
GFP_ATOMIC);
break;
default:
pr_debug("%s: %s unknown command %x\n", card->name,
__func__, cmd);
return -1;
}
return 0;
}
static int
open_dchannel(struct w6692_hw *card, struct channel_req *rq, void *caller)
{
pr_debug("%s: %s dev(%d) open from %p\n", card->name, __func__,
card->dch.dev.id, caller);
if (rq->protocol != ISDN_P_TE_S0)
return -EINVAL;
if (rq->adr.channel == 1)
/* E-Channel not supported */
return -EINVAL;
rq->ch = &card->dch.dev.D;
rq->ch->protocol = rq->protocol;
if (card->dch.state == 7)
_queue_data(rq->ch, PH_ACTIVATE_IND, MISDN_ID_ANY,
0, NULL, GFP_KERNEL);
return 0;
}
static int
w6692_dctrl(struct mISDNchannel *ch, u32 cmd, void *arg)
{
struct mISDNdevice *dev = container_of(ch, struct mISDNdevice, D);
struct dchannel *dch = container_of(dev, struct dchannel, dev);
struct w6692_hw *card = container_of(dch, struct w6692_hw, dch);
struct channel_req *rq;
int err = 0;
pr_debug("%s: DCTRL: %x %p\n", card->name, cmd, arg);
switch (cmd) {
case OPEN_CHANNEL:
rq = arg;
if (rq->protocol == ISDN_P_TE_S0)
err = open_dchannel(card, rq, __builtin_return_address(0));
else
err = open_bchannel(card, rq);
if (err)
break;
if (!try_module_get(THIS_MODULE))
pr_info("%s: cannot get module\n", card->name);
break;
case CLOSE_CHANNEL:
pr_debug("%s: dev(%d) close from %p\n", card->name,
dch->dev.id, __builtin_return_address(0));
module_put(THIS_MODULE);
break;
case CONTROL_CHANNEL:
err = channel_ctrl(card, arg);
break;
default:
pr_debug("%s: unknown DCTRL command %x\n", card->name, cmd);
return -EINVAL;
}
return err;
}
static int
setup_w6692(struct w6692_hw *card)
{
u32 val;
if (!request_region(card->addr, 256, card->name)) {
pr_info("%s: config port %x-%x already in use\n", card->name,
card->addr, card->addr + 255);
return -EIO;
}
W6692Version(card);
card->bc[0].addr = card->addr;
card->bc[1].addr = card->addr + 0x40;
val = ReadW6692(card, W_ISTA);
if (debug & DEBUG_HW)
pr_notice("%s ISTA=%02x\n", card->name, val);
val = ReadW6692(card, W_IMASK);
if (debug & DEBUG_HW)
pr_notice("%s IMASK=%02x\n", card->name, val);
val = ReadW6692(card, W_D_EXIR);
if (debug & DEBUG_HW)
pr_notice("%s D_EXIR=%02x\n", card->name, val);
val = ReadW6692(card, W_D_EXIM);
if (debug & DEBUG_HW)
pr_notice("%s D_EXIM=%02x\n", card->name, val);
val = ReadW6692(card, W_D_RSTA);
if (debug & DEBUG_HW)
pr_notice("%s D_RSTA=%02x\n", card->name, val);
return 0;
}
static void
release_card(struct w6692_hw *card)
{
u_long flags;
spin_lock_irqsave(&card->lock, flags);
disable_hwirq(card);
w6692_mode(&card->bc[0], ISDN_P_NONE);
w6692_mode(&card->bc[1], ISDN_P_NONE);
if ((card->fmask & led) || card->subtype == W6692_USR) {
card->xdata |= 0x04; /* LED OFF */
WriteW6692(card, W_XDATA, card->xdata);
}
spin_unlock_irqrestore(&card->lock, flags);
free_irq(card->irq, card);
l1_event(card->dch.l1, CLOSE_CHANNEL);
mISDN_unregister_device(&card->dch.dev);
release_region(card->addr, 256);
mISDN_freebchannel(&card->bc[1].bch);
mISDN_freebchannel(&card->bc[0].bch);
mISDN_freedchannel(&card->dch);
write_lock_irqsave(&card_lock, flags);
list_del(&card->list);
write_unlock_irqrestore(&card_lock, flags);
pci_disable_device(card->pdev);
pci_set_drvdata(card->pdev, NULL);
kfree(card);
}
static int
setup_instance(struct w6692_hw *card)
{
int i, err;
u_long flags;
snprintf(card->name, MISDN_MAX_IDLEN - 1, "w6692.%d", w6692_cnt + 1);
write_lock_irqsave(&card_lock, flags);
list_add_tail(&card->list, &Cards);
write_unlock_irqrestore(&card_lock, flags);
card->fmask = (1 << w6692_cnt);
_set_debug(card);
spin_lock_init(&card->lock);
mISDN_initdchannel(&card->dch, MAX_DFRAME_LEN_L1, W6692_ph_bh);
card->dch.dev.Dprotocols = (1 << ISDN_P_TE_S0);
card->dch.dev.D.send = w6692_l2l1D;
card->dch.dev.D.ctrl = w6692_dctrl;
card->dch.dev.Bprotocols = (1 << (ISDN_P_B_RAW & ISDN_P_B_MASK)) |
(1 << (ISDN_P_B_HDLC & ISDN_P_B_MASK));
card->dch.hw = card;
card->dch.dev.nrbchan = 2;
for (i = 0; i < 2; i++) {
mISDN_initbchannel(&card->bc[i].bch, MAX_DATA_MEM,
W_B_FIFO_THRESH);
card->bc[i].bch.hw = card;
card->bc[i].bch.nr = i + 1;
card->bc[i].bch.ch.nr = i + 1;
card->bc[i].bch.ch.send = w6692_l2l1B;
card->bc[i].bch.ch.ctrl = w6692_bctrl;
set_channelmap(i + 1, card->dch.dev.channelmap);
list_add(&card->bc[i].bch.ch.list, &card->dch.dev.bchannels);
}
err = setup_w6692(card);
if (err)
goto error_setup;
err = mISDN_register_device(&card->dch.dev, &card->pdev->dev,
card->name);
if (err)
goto error_reg;
err = init_card(card);
if (err)
goto error_init;
err = create_l1(&card->dch, w6692_l1callback);
if (!err) {
w6692_cnt++;
pr_notice("W6692 %d cards installed\n", w6692_cnt);
return 0;
}
free_irq(card->irq, card);
error_init:
mISDN_unregister_device(&card->dch.dev);
error_reg:
release_region(card->addr, 256);
error_setup:
mISDN_freebchannel(&card->bc[1].bch);
mISDN_freebchannel(&card->bc[0].bch);
mISDN_freedchannel(&card->dch);
write_lock_irqsave(&card_lock, flags);
list_del(&card->list);
write_unlock_irqrestore(&card_lock, flags);
kfree(card);
return err;
}
static int
w6692_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
int err = -ENOMEM;
struct w6692_hw *card;
struct w6692map *m = (struct w6692map *)ent->driver_data;
card = kzalloc(sizeof(struct w6692_hw), GFP_KERNEL);
if (!card) {
pr_info("No kmem for w6692 card\n");
return err;
}
card->pdev = pdev;
card->subtype = m->subtype;
err = pci_enable_device(pdev);
if (err) {
kfree(card);
return err;
}
printk(KERN_INFO "mISDN_w6692: found adapter %s at %s\n",
m->name, pci_name(pdev));
card->addr = pci_resource_start(pdev, 1);
card->irq = pdev->irq;
pci_set_drvdata(pdev, card);
err = setup_instance(card);
if (err)
pci_set_drvdata(pdev, NULL);
return err;
}
static void
w6692_remove_pci(struct pci_dev *pdev)
{
struct w6692_hw *card = pci_get_drvdata(pdev);
if (card)
release_card(card);
else
if (debug)
pr_notice("%s: drvdata already removed\n", __func__);
}
static const struct pci_device_id w6692_ids[] = {
{ PCI_VENDOR_ID_DYNALINK, PCI_DEVICE_ID_DYNALINK_IS64PH,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, (ulong)&w6692_map[0]},
{ PCI_VENDOR_ID_WINBOND2, PCI_DEVICE_ID_WINBOND2_6692,
PCI_VENDOR_ID_USR, PCI_DEVICE_ID_USR_6692, 0, 0,
(ulong)&w6692_map[2]},
{ PCI_VENDOR_ID_WINBOND2, PCI_DEVICE_ID_WINBOND2_6692,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, (ulong)&w6692_map[1]},
{ }
};
MODULE_DEVICE_TABLE(pci, w6692_ids);
static struct pci_driver w6692_driver = {
.name = "w6692",
.probe = w6692_probe,
.remove = w6692_remove_pci,
.id_table = w6692_ids,
};
static int __init w6692_init(void)
{
int err;
pr_notice("Winbond W6692 PCI driver Rev. %s\n", W6692_REV);
err = pci_register_driver(&w6692_driver);
return err;
}
static void __exit w6692_cleanup(void)
{
pci_unregister_driver(&w6692_driver);
}
module_init(w6692_init);
module_exit(w6692_cleanup);
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