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linux/drivers/isdn/hisax/hfc4s8s_l1.c
Andrzej Hajda 8f89642fa1 isdn: hisax: fix frame calculation 
Difference of unsigned values is also unsigned so it does not make
sense to check its sign.

The problem has been detected using proposed semantic patch
scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci [1].

[1]: http://permalink.gmane.org/gmane.linux.kernel/2038576

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-09-22 16:14:31 -07:00

1585 lines
39 KiB
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/*************************************************************************/
/* $Id: hfc4s8s_l1.c,v 1.10 2005/02/09 16:31:09 martinb1 Exp $ */
/* HFC-4S/8S low layer interface for Cologne Chip HFC-4S/8S isdn chips */
/* The low layer (L1) is implemented as a loadable module for usage with */
/* the HiSax isdn driver for passive cards. */
/* */
/* Author: Werner Cornelius */
/* (C) 2003 Cornelius Consult (werner@cornelius-consult.de) */
/* */
/* Driver maintained by Cologne Chip */
/* - Martin Bachem, support@colognechip.com */
/* */
/* This driver only works with chip revisions >= 1, older revision 0 */
/* engineering samples (only first manufacturer sample cards) will not */
/* work and are rejected by the driver. */
/* */
/* This file distributed under the GNU GPL. */
/* */
/* See Version History at the end of this file */
/* */
/*************************************************************************/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/timer.h>
#include <linux/skbuff.h>
#include <linux/wait.h>
#include <asm/io.h>
#include "hisax_if.h"
#include "hfc4s8s_l1.h"
static const char hfc4s8s_rev[] = "Revision: 1.10";
/***************************************************************/
/* adjustable transparent mode fifo threshold */
/* The value defines the used fifo threshold with the equation */
/* */
/* notify number of bytes = 2 * 2 ^ TRANS_FIFO_THRES */
/* */
/* The default value is 5 which results in a buffer size of 64 */
/* and an interrupt rate of 8ms. */
/* The maximum value is 7 due to fifo size restrictions. */
/* Values below 3-4 are not recommended due to high interrupt */
/* load of the processor. For non critical applications the */
/* value should be raised to 7 to reduce any interrupt overhead*/
/***************************************************************/
#define TRANS_FIFO_THRES 5
/*************/
/* constants */
/*************/
#define CLOCKMODE_0 0 /* ext. 24.576 MhZ clk freq, int. single clock mode */
#define CLOCKMODE_1 1 /* ext. 49.576 MhZ clk freq, int. single clock mode */
#define CHIP_ID_SHIFT 4
#define HFC_MAX_ST 8
#define MAX_D_FRAME_SIZE 270
#define MAX_B_FRAME_SIZE 1536
#define TRANS_TIMER_MODE (TRANS_FIFO_THRES & 0xf)
#define TRANS_FIFO_BYTES (2 << TRANS_FIFO_THRES)
#define MAX_F_CNT 0x0f
#define CLKDEL_NT 0x6c
#define CLKDEL_TE 0xf
#define CTRL0_NT 4
#define CTRL0_TE 0
#define L1_TIMER_T4 2 /* minimum in jiffies */
#define L1_TIMER_T3 (7 * HZ) /* activation timeout */
#define L1_TIMER_T1 ((120 * HZ) / 1000) /* NT mode deactivation timeout */
/******************/
/* types and vars */
/******************/
static int card_cnt;
/* private driver_data */
typedef struct {
int chip_id;
int clock_mode;
int max_st_ports;
char *device_name;
} hfc4s8s_param;
static struct pci_device_id hfc4s8s_ids[] = {
{.vendor = PCI_VENDOR_ID_CCD,
.device = PCI_DEVICE_ID_4S,
.subvendor = 0x1397,
.subdevice = 0x08b4,
.driver_data =
(unsigned long) &((hfc4s8s_param) {CHIP_ID_4S, CLOCKMODE_0, 4,
"HFC-4S Evaluation Board"}),
},
{.vendor = PCI_VENDOR_ID_CCD,
.device = PCI_DEVICE_ID_8S,
.subvendor = 0x1397,
.subdevice = 0x16b8,
.driver_data =
(unsigned long) &((hfc4s8s_param) {CHIP_ID_8S, CLOCKMODE_0, 8,
"HFC-8S Evaluation Board"}),
},
{.vendor = PCI_VENDOR_ID_CCD,
.device = PCI_DEVICE_ID_4S,
.subvendor = 0x1397,
.subdevice = 0xb520,
.driver_data =
(unsigned long) &((hfc4s8s_param) {CHIP_ID_4S, CLOCKMODE_1, 4,
"IOB4ST"}),
},
{.vendor = PCI_VENDOR_ID_CCD,
.device = PCI_DEVICE_ID_8S,
.subvendor = 0x1397,
.subdevice = 0xb522,
.driver_data =
(unsigned long) &((hfc4s8s_param) {CHIP_ID_8S, CLOCKMODE_1, 8,
"IOB8ST"}),
},
{}
};
MODULE_DEVICE_TABLE(pci, hfc4s8s_ids);
MODULE_AUTHOR("Werner Cornelius, werner@cornelius-consult.de");
MODULE_DESCRIPTION("ISDN layer 1 for Cologne Chip HFC-4S/8S chips");
MODULE_LICENSE("GPL");
/***********/
/* layer 1 */
/***********/
struct hfc4s8s_btype {
spinlock_t lock;
struct hisax_b_if b_if;
struct hfc4s8s_l1 *l1p;
struct sk_buff_head tx_queue;
struct sk_buff *tx_skb;
struct sk_buff *rx_skb;
__u8 *rx_ptr;
int tx_cnt;
int bchan;
int mode;
};
struct _hfc4s8s_hw;
struct hfc4s8s_l1 {
spinlock_t lock;
struct _hfc4s8s_hw *hw; /* pointer to hardware area */
int l1_state; /* actual l1 state */
struct timer_list l1_timer; /* layer 1 timer structure */
int nt_mode; /* set to nt mode */
int st_num; /* own index */
int enabled; /* interface is enabled */
struct sk_buff_head d_tx_queue; /* send queue */
int tx_cnt; /* bytes to send */
struct hisax_d_if d_if; /* D-channel interface */
struct hfc4s8s_btype b_ch[2]; /* B-channel data */
struct hisax_b_if *b_table[2];
};
/**********************/
/* hardware structure */
/**********************/
typedef struct _hfc4s8s_hw {
spinlock_t lock;
int cardnum;
int ifnum;
int iobase;
int nt_mode;
u_char *membase;
u_char *hw_membase;
void *pdev;
int max_fifo;
hfc4s8s_param driver_data;
int irq;
int fifo_sched_cnt;
struct work_struct tqueue;
struct hfc4s8s_l1 l1[HFC_MAX_ST];
char card_name[60];
struct {
u_char r_irq_ctrl;
u_char r_ctrl0;
volatile u_char r_irq_statech; /* active isdn l1 status */
u_char r_irqmsk_statchg; /* enabled isdn status ints */
u_char r_irq_fifo_blx[8]; /* fifo status registers */
u_char fifo_rx_trans_enables[8]; /* mask for enabled transparent rx fifos */
u_char fifo_slow_timer_service[8]; /* mask for fifos needing slower timer service */
volatile u_char r_irq_oview; /* contents of overview register */
volatile u_char timer_irq;
int timer_usg_cnt; /* number of channels using timer */
} mr;
} hfc4s8s_hw;
/* inline functions io mapped */
static inline void
SetRegAddr(hfc4s8s_hw *a, u_char b)
{
outb(b, (a->iobase) + 4);
}
static inline u_char
GetRegAddr(hfc4s8s_hw *a)
{
return (inb((volatile u_int) (a->iobase + 4)));
}
static inline void
Write_hfc8(hfc4s8s_hw *a, u_char b, u_char c)
{
SetRegAddr(a, b);
outb(c, a->iobase);
}
static inline void
fWrite_hfc8(hfc4s8s_hw *a, u_char c)
{
outb(c, a->iobase);
}
static inline void
fWrite_hfc32(hfc4s8s_hw *a, u_long c)
{
outl(c, a->iobase);
}
static inline u_char
Read_hfc8(hfc4s8s_hw *a, u_char b)
{
SetRegAddr(a, b);
return (inb((volatile u_int) a->iobase));
}
static inline u_char
fRead_hfc8(hfc4s8s_hw *a)
{
return (inb((volatile u_int) a->iobase));
}
static inline u_short
Read_hfc16(hfc4s8s_hw *a, u_char b)
{
SetRegAddr(a, b);
return (inw((volatile u_int) a->iobase));
}
static inline u_long
fRead_hfc32(hfc4s8s_hw *a)
{
return (inl((volatile u_int) a->iobase));
}
static inline void
wait_busy(hfc4s8s_hw *a)
{
SetRegAddr(a, R_STATUS);
while (inb((volatile u_int) a->iobase) & M_BUSY);
}
#define PCI_ENA_REGIO 0x01
/******************************************************/
/* function to read critical counter registers that */
/* may be updated by the chip during read */
/******************************************************/
static u_char
Read_hfc8_stable(hfc4s8s_hw *hw, int reg)
{
u_char ref8;
u_char in8;
ref8 = Read_hfc8(hw, reg);
while (((in8 = Read_hfc8(hw, reg)) != ref8)) {
ref8 = in8;
}
return in8;
}
static int
Read_hfc16_stable(hfc4s8s_hw *hw, int reg)
{
int ref16;
int in16;
ref16 = Read_hfc16(hw, reg);
while (((in16 = Read_hfc16(hw, reg)) != ref16)) {
ref16 = in16;
}
return in16;
}
/*****************************/
/* D-channel call from HiSax */
/*****************************/
static void
dch_l2l1(struct hisax_d_if *iface, int pr, void *arg)
{
struct hfc4s8s_l1 *l1 = iface->ifc.priv;
struct sk_buff *skb = (struct sk_buff *) arg;
u_long flags;
switch (pr) {
case (PH_DATA | REQUEST):
if (!l1->enabled) {
dev_kfree_skb(skb);
break;
}
spin_lock_irqsave(&l1->lock, flags);
skb_queue_tail(&l1->d_tx_queue, skb);
if ((skb_queue_len(&l1->d_tx_queue) == 1) &&
(l1->tx_cnt <= 0)) {
l1->hw->mr.r_irq_fifo_blx[l1->st_num] |=
0x10;
spin_unlock_irqrestore(&l1->lock, flags);
schedule_work(&l1->hw->tqueue);
} else
spin_unlock_irqrestore(&l1->lock, flags);
break;
case (PH_ACTIVATE | REQUEST):
if (!l1->enabled)
break;
if (!l1->nt_mode) {
if (l1->l1_state < 6) {
spin_lock_irqsave(&l1->lock,
flags);
Write_hfc8(l1->hw, R_ST_SEL,
l1->st_num);
Write_hfc8(l1->hw, A_ST_WR_STA,
0x60);
mod_timer(&l1->l1_timer,
jiffies + L1_TIMER_T3);
spin_unlock_irqrestore(&l1->lock,
flags);
} else if (l1->l1_state == 7)
l1->d_if.ifc.l1l2(&l1->d_if.ifc,
PH_ACTIVATE |
INDICATION,
NULL);
} else {
if (l1->l1_state != 3) {
spin_lock_irqsave(&l1->lock,
flags);
Write_hfc8(l1->hw, R_ST_SEL,
l1->st_num);
Write_hfc8(l1->hw, A_ST_WR_STA,
0x60);
spin_unlock_irqrestore(&l1->lock,
flags);
} else if (l1->l1_state == 3)
l1->d_if.ifc.l1l2(&l1->d_if.ifc,
PH_ACTIVATE |
INDICATION,
NULL);
}
break;
default:
printk(KERN_INFO
"HFC-4S/8S: Unknown D-chan cmd 0x%x received, ignored\n",
pr);
break;
}
if (!l1->enabled)
l1->d_if.ifc.l1l2(&l1->d_if.ifc,
PH_DEACTIVATE | INDICATION, NULL);
} /* dch_l2l1 */
/*****************************/
/* B-channel call from HiSax */
/*****************************/
static void
bch_l2l1(struct hisax_if *ifc, int pr, void *arg)
{
struct hfc4s8s_btype *bch = ifc->priv;
struct hfc4s8s_l1 *l1 = bch->l1p;
struct sk_buff *skb = (struct sk_buff *) arg;
long mode = (long) arg;
u_long flags;
switch (pr) {
case (PH_DATA | REQUEST):
if (!l1->enabled || (bch->mode == L1_MODE_NULL)) {
dev_kfree_skb(skb);
break;
}
spin_lock_irqsave(&l1->lock, flags);
skb_queue_tail(&bch->tx_queue, skb);
if (!bch->tx_skb && (bch->tx_cnt <= 0)) {
l1->hw->mr.r_irq_fifo_blx[l1->st_num] |=
((bch->bchan == 1) ? 1 : 4);
spin_unlock_irqrestore(&l1->lock, flags);
schedule_work(&l1->hw->tqueue);
} else
spin_unlock_irqrestore(&l1->lock, flags);
break;
case (PH_ACTIVATE | REQUEST):
case (PH_DEACTIVATE | REQUEST):
if (!l1->enabled)
break;
if (pr == (PH_DEACTIVATE | REQUEST))
mode = L1_MODE_NULL;
switch (mode) {
case L1_MODE_HDLC:
spin_lock_irqsave(&l1->lock,
flags);
l1->hw->mr.timer_usg_cnt++;
l1->hw->mr.
fifo_slow_timer_service[l1->
st_num]
|=
((bch->bchan ==
1) ? 0x2 : 0x8);
Write_hfc8(l1->hw, R_FIFO,
(l1->st_num * 8 +
((bch->bchan ==
1) ? 0 : 2)));
wait_busy(l1->hw);
Write_hfc8(l1->hw, A_CON_HDLC, 0xc); /* HDLC mode, flag fill, connect ST */
Write_hfc8(l1->hw, A_SUBCH_CFG, 0); /* 8 bits */
Write_hfc8(l1->hw, A_IRQ_MSK, 1); /* enable TX interrupts for hdlc */
Write_hfc8(l1->hw, A_INC_RES_FIFO, 2); /* reset fifo */
wait_busy(l1->hw);
Write_hfc8(l1->hw, R_FIFO,
(l1->st_num * 8 +
((bch->bchan ==
1) ? 1 : 3)));
wait_busy(l1->hw);
Write_hfc8(l1->hw, A_CON_HDLC, 0xc); /* HDLC mode, flag fill, connect ST */
Write_hfc8(l1->hw, A_SUBCH_CFG, 0); /* 8 bits */
Write_hfc8(l1->hw, A_IRQ_MSK, 1); /* enable RX interrupts for hdlc */
Write_hfc8(l1->hw, A_INC_RES_FIFO, 2); /* reset fifo */
Write_hfc8(l1->hw, R_ST_SEL,
l1->st_num);
l1->hw->mr.r_ctrl0 |=
(bch->bchan & 3);
Write_hfc8(l1->hw, A_ST_CTRL0,
l1->hw->mr.r_ctrl0);
bch->mode = L1_MODE_HDLC;
spin_unlock_irqrestore(&l1->lock,
flags);
bch->b_if.ifc.l1l2(&bch->b_if.ifc,
PH_ACTIVATE |
INDICATION,
NULL);
break;
case L1_MODE_TRANS:
spin_lock_irqsave(&l1->lock,
flags);
l1->hw->mr.
fifo_rx_trans_enables[l1->
st_num]
|=
((bch->bchan ==
1) ? 0x2 : 0x8);
l1->hw->mr.timer_usg_cnt++;
Write_hfc8(l1->hw, R_FIFO,
(l1->st_num * 8 +
((bch->bchan ==
1) ? 0 : 2)));
wait_busy(l1->hw);
Write_hfc8(l1->hw, A_CON_HDLC, 0xf); /* Transparent mode, 1 fill, connect ST */
Write_hfc8(l1->hw, A_SUBCH_CFG, 0); /* 8 bits */
Write_hfc8(l1->hw, A_IRQ_MSK, 0); /* disable TX interrupts */
Write_hfc8(l1->hw, A_INC_RES_FIFO, 2); /* reset fifo */
wait_busy(l1->hw);
Write_hfc8(l1->hw, R_FIFO,
(l1->st_num * 8 +
((bch->bchan ==
1) ? 1 : 3)));
wait_busy(l1->hw);
Write_hfc8(l1->hw, A_CON_HDLC, 0xf); /* Transparent mode, 1 fill, connect ST */
Write_hfc8(l1->hw, A_SUBCH_CFG, 0); /* 8 bits */
Write_hfc8(l1->hw, A_IRQ_MSK, 0); /* disable RX interrupts */
Write_hfc8(l1->hw, A_INC_RES_FIFO, 2); /* reset fifo */
Write_hfc8(l1->hw, R_ST_SEL,
l1->st_num);
l1->hw->mr.r_ctrl0 |=
(bch->bchan & 3);
Write_hfc8(l1->hw, A_ST_CTRL0,
l1->hw->mr.r_ctrl0);
bch->mode = L1_MODE_TRANS;
spin_unlock_irqrestore(&l1->lock,
flags);
bch->b_if.ifc.l1l2(&bch->b_if.ifc,
PH_ACTIVATE |
INDICATION,
NULL);
break;
default:
if (bch->mode == L1_MODE_NULL)
break;
spin_lock_irqsave(&l1->lock,
flags);
l1->hw->mr.
fifo_slow_timer_service[l1->
st_num]
&=
~((bch->bchan ==
1) ? 0x3 : 0xc);
l1->hw->mr.
fifo_rx_trans_enables[l1->
st_num]
&=
~((bch->bchan ==
1) ? 0x3 : 0xc);
l1->hw->mr.timer_usg_cnt--;
Write_hfc8(l1->hw, R_FIFO,
(l1->st_num * 8 +
((bch->bchan ==
1) ? 0 : 2)));
wait_busy(l1->hw);
Write_hfc8(l1->hw, A_IRQ_MSK, 0); /* disable TX interrupts */
wait_busy(l1->hw);
Write_hfc8(l1->hw, R_FIFO,
(l1->st_num * 8 +
((bch->bchan ==
1) ? 1 : 3)));
wait_busy(l1->hw);
Write_hfc8(l1->hw, A_IRQ_MSK, 0); /* disable RX interrupts */
Write_hfc8(l1->hw, R_ST_SEL,
l1->st_num);
l1->hw->mr.r_ctrl0 &=
~(bch->bchan & 3);
Write_hfc8(l1->hw, A_ST_CTRL0,
l1->hw->mr.r_ctrl0);
spin_unlock_irqrestore(&l1->lock,
flags);
bch->mode = L1_MODE_NULL;
bch->b_if.ifc.l1l2(&bch->b_if.ifc,
PH_DEACTIVATE |
INDICATION,
NULL);
if (bch->tx_skb) {
dev_kfree_skb(bch->tx_skb);
bch->tx_skb = NULL;
}
if (bch->rx_skb) {
dev_kfree_skb(bch->rx_skb);
bch->rx_skb = NULL;
}
skb_queue_purge(&bch->tx_queue);
bch->tx_cnt = 0;
bch->rx_ptr = NULL;
break;
}
/* timer is only used when at least one b channel */
/* is set up to transparent mode */
if (l1->hw->mr.timer_usg_cnt) {
Write_hfc8(l1->hw, R_IRQMSK_MISC,
M_TI_IRQMSK);
} else {
Write_hfc8(l1->hw, R_IRQMSK_MISC, 0);
}
break;
default:
printk(KERN_INFO
"HFC-4S/8S: Unknown B-chan cmd 0x%x received, ignored\n",
pr);
break;
}
if (!l1->enabled)
bch->b_if.ifc.l1l2(&bch->b_if.ifc,
PH_DEACTIVATE | INDICATION, NULL);
} /* bch_l2l1 */
/**************************/
/* layer 1 timer function */
/**************************/
static void
hfc_l1_timer(struct hfc4s8s_l1 *l1)
{
u_long flags;
if (!l1->enabled)
return;
spin_lock_irqsave(&l1->lock, flags);
if (l1->nt_mode) {
l1->l1_state = 1;
Write_hfc8(l1->hw, R_ST_SEL, l1->st_num);
Write_hfc8(l1->hw, A_ST_WR_STA, 0x11);
spin_unlock_irqrestore(&l1->lock, flags);
l1->d_if.ifc.l1l2(&l1->d_if.ifc,
PH_DEACTIVATE | INDICATION, NULL);
spin_lock_irqsave(&l1->lock, flags);
l1->l1_state = 1;
Write_hfc8(l1->hw, A_ST_WR_STA, 0x1);
spin_unlock_irqrestore(&l1->lock, flags);
} else {
/* activation timed out */
Write_hfc8(l1->hw, R_ST_SEL, l1->st_num);
Write_hfc8(l1->hw, A_ST_WR_STA, 0x13);
spin_unlock_irqrestore(&l1->lock, flags);
l1->d_if.ifc.l1l2(&l1->d_if.ifc,
PH_DEACTIVATE | INDICATION, NULL);
spin_lock_irqsave(&l1->lock, flags);
Write_hfc8(l1->hw, R_ST_SEL, l1->st_num);
Write_hfc8(l1->hw, A_ST_WR_STA, 0x3);
spin_unlock_irqrestore(&l1->lock, flags);
}
} /* hfc_l1_timer */
/****************************************/
/* a complete D-frame has been received */
/****************************************/
static void
rx_d_frame(struct hfc4s8s_l1 *l1p, int ech)
{
int z1, z2;
u_char f1, f2, df;
struct sk_buff *skb;
u_char *cp;
if (!l1p->enabled)
return;
do {
/* E/D RX fifo */
Write_hfc8(l1p->hw, R_FIFO,
(l1p->st_num * 8 + ((ech) ? 7 : 5)));
wait_busy(l1p->hw);
f1 = Read_hfc8_stable(l1p->hw, A_F1);
f2 = Read_hfc8(l1p->hw, A_F2);
if (f1 < f2)
df = MAX_F_CNT + 1 + f1 - f2;
else
df = f1 - f2;
if (!df)
return; /* no complete frame in fifo */
z1 = Read_hfc16_stable(l1p->hw, A_Z1);
z2 = Read_hfc16(l1p->hw, A_Z2);
z1 = z1 - z2 + 1;
if (z1 < 0)
z1 += 384;
if (!(skb = dev_alloc_skb(MAX_D_FRAME_SIZE))) {
printk(KERN_INFO
"HFC-4S/8S: Could not allocate D/E "
"channel receive buffer");
Write_hfc8(l1p->hw, A_INC_RES_FIFO, 2);
wait_busy(l1p->hw);
return;
}
if (((z1 < 4) || (z1 > MAX_D_FRAME_SIZE))) {
if (skb)
dev_kfree_skb(skb);
/* remove errornous D frame */
if (df == 1) {
/* reset fifo */
Write_hfc8(l1p->hw, A_INC_RES_FIFO, 2);
wait_busy(l1p->hw);
return;
} else {
/* read errornous D frame */
SetRegAddr(l1p->hw, A_FIFO_DATA0);
while (z1 >= 4) {
fRead_hfc32(l1p->hw);
z1 -= 4;
}
while (z1--)
fRead_hfc8(l1p->hw);
Write_hfc8(l1p->hw, A_INC_RES_FIFO, 1);
wait_busy(l1p->hw);
return;
}
}
cp = skb->data;
SetRegAddr(l1p->hw, A_FIFO_DATA0);
while (z1 >= 4) {
*((unsigned long *) cp) = fRead_hfc32(l1p->hw);
cp += 4;
z1 -= 4;
}
while (z1--)
*cp++ = fRead_hfc8(l1p->hw);
Write_hfc8(l1p->hw, A_INC_RES_FIFO, 1); /* increment f counter */
wait_busy(l1p->hw);
if (*(--cp)) {
dev_kfree_skb(skb);
} else {
skb->len = (cp - skb->data) - 2;
if (ech)
l1p->d_if.ifc.l1l2(&l1p->d_if.ifc,
PH_DATA_E | INDICATION,
skb);
else
l1p->d_if.ifc.l1l2(&l1p->d_if.ifc,
PH_DATA | INDICATION,
skb);
}
} while (1);
} /* rx_d_frame */
/*************************************************************/
/* a B-frame has been received (perhaps not fully completed) */
/*************************************************************/
static void
rx_b_frame(struct hfc4s8s_btype *bch)
{
int z1, z2, hdlc_complete;
u_char f1, f2;
struct hfc4s8s_l1 *l1 = bch->l1p;
struct sk_buff *skb;
if (!l1->enabled || (bch->mode == L1_MODE_NULL))
return;
do {
/* RX Fifo */
Write_hfc8(l1->hw, R_FIFO,
(l1->st_num * 8 + ((bch->bchan == 1) ? 1 : 3)));
wait_busy(l1->hw);
if (bch->mode == L1_MODE_HDLC) {
f1 = Read_hfc8_stable(l1->hw, A_F1);
f2 = Read_hfc8(l1->hw, A_F2);
hdlc_complete = ((f1 ^ f2) & MAX_F_CNT);
} else
hdlc_complete = 0;
z1 = Read_hfc16_stable(l1->hw, A_Z1);
z2 = Read_hfc16(l1->hw, A_Z2);
z1 = (z1 - z2);
if (hdlc_complete)
z1++;
if (z1 < 0)
z1 += 384;
if (!z1)
break;
if (!(skb = bch->rx_skb)) {
if (!
(skb =
dev_alloc_skb((bch->mode ==
L1_MODE_TRANS) ? z1
: (MAX_B_FRAME_SIZE + 3)))) {
printk(KERN_ERR
"HFC-4S/8S: Could not allocate B "
"channel receive buffer");
return;
}
bch->rx_ptr = skb->data;
bch->rx_skb = skb;
}
skb->len = (bch->rx_ptr - skb->data) + z1;
/* HDLC length check */
if ((bch->mode == L1_MODE_HDLC) &&
((hdlc_complete && (skb->len < 4)) ||
(skb->len > (MAX_B_FRAME_SIZE + 3)))) {
skb->len = 0;
bch->rx_ptr = skb->data;
Write_hfc8(l1->hw, A_INC_RES_FIFO, 2); /* reset fifo */
wait_busy(l1->hw);
return;
}
SetRegAddr(l1->hw, A_FIFO_DATA0);
while (z1 >= 4) {
*((unsigned long *) bch->rx_ptr) =
fRead_hfc32(l1->hw);
bch->rx_ptr += 4;
z1 -= 4;
}
while (z1--)
*(bch->rx_ptr++) = fRead_hfc8(l1->hw);
if (hdlc_complete) {
/* increment f counter */
Write_hfc8(l1->hw, A_INC_RES_FIFO, 1);
wait_busy(l1->hw);
/* hdlc crc check */
bch->rx_ptr--;
if (*bch->rx_ptr) {
skb->len = 0;
bch->rx_ptr = skb->data;
continue;
}
skb->len -= 3;
}
if (hdlc_complete || (bch->mode == L1_MODE_TRANS)) {
bch->rx_skb = NULL;
bch->rx_ptr = NULL;
bch->b_if.ifc.l1l2(&bch->b_if.ifc,
PH_DATA | INDICATION, skb);
}
} while (1);
} /* rx_b_frame */
/********************************************/
/* a D-frame has been/should be transmitted */
/********************************************/
static void
tx_d_frame(struct hfc4s8s_l1 *l1p)
{
struct sk_buff *skb;
u_char f1, f2;
u_char *cp;
long cnt;
if (l1p->l1_state != 7)
return;
/* TX fifo */
Write_hfc8(l1p->hw, R_FIFO, (l1p->st_num * 8 + 4));
wait_busy(l1p->hw);
f1 = Read_hfc8(l1p->hw, A_F1);
f2 = Read_hfc8_stable(l1p->hw, A_F2);
if ((f1 ^ f2) & MAX_F_CNT)
return; /* fifo is still filled */
if (l1p->tx_cnt > 0) {
cnt = l1p->tx_cnt;
l1p->tx_cnt = 0;
l1p->d_if.ifc.l1l2(&l1p->d_if.ifc, PH_DATA | CONFIRM,
(void *) cnt);
}
if ((skb = skb_dequeue(&l1p->d_tx_queue))) {
cp = skb->data;
cnt = skb->len;
SetRegAddr(l1p->hw, A_FIFO_DATA0);
while (cnt >= 4) {
SetRegAddr(l1p->hw, A_FIFO_DATA0);
fWrite_hfc32(l1p->hw, *(unsigned long *) cp);
cp += 4;
cnt -= 4;
}
while (cnt--)
fWrite_hfc8(l1p->hw, *cp++);
l1p->tx_cnt = skb->truesize;
Write_hfc8(l1p->hw, A_INC_RES_FIFO, 1); /* increment f counter */
wait_busy(l1p->hw);
dev_kfree_skb(skb);
}
} /* tx_d_frame */
/******************************************************/
/* a B-frame may be transmitted (or is not completed) */
/******************************************************/
static void
tx_b_frame(struct hfc4s8s_btype *bch)
{
struct sk_buff *skb;
struct hfc4s8s_l1 *l1 = bch->l1p;
u_char *cp;
int cnt, max, hdlc_num;
long ack_len = 0;
if (!l1->enabled || (bch->mode == L1_MODE_NULL))
return;
/* TX fifo */
Write_hfc8(l1->hw, R_FIFO,
(l1->st_num * 8 + ((bch->bchan == 1) ? 0 : 2)));
wait_busy(l1->hw);
do {
if (bch->mode == L1_MODE_HDLC) {
hdlc_num = Read_hfc8(l1->hw, A_F1) & MAX_F_CNT;
hdlc_num -=
(Read_hfc8_stable(l1->hw, A_F2) & MAX_F_CNT);
if (hdlc_num < 0)
hdlc_num += 16;
if (hdlc_num >= 15)
break; /* fifo still filled up with hdlc frames */
} else
hdlc_num = 0;
if (!(skb = bch->tx_skb)) {
if (!(skb = skb_dequeue(&bch->tx_queue))) {
l1->hw->mr.fifo_slow_timer_service[l1->
st_num]
&= ~((bch->bchan == 1) ? 1 : 4);
break; /* list empty */
}
bch->tx_skb = skb;
bch->tx_cnt = 0;
}
if (!hdlc_num)
l1->hw->mr.fifo_slow_timer_service[l1->st_num] |=
((bch->bchan == 1) ? 1 : 4);
else
l1->hw->mr.fifo_slow_timer_service[l1->st_num] &=
~((bch->bchan == 1) ? 1 : 4);
max = Read_hfc16_stable(l1->hw, A_Z2);
max -= Read_hfc16(l1->hw, A_Z1);
if (max <= 0)
max += 384;
max--;
if (max < 16)
break; /* don't write to small amounts of bytes */
cnt = skb->len - bch->tx_cnt;
if (cnt > max)
cnt = max;
cp = skb->data + bch->tx_cnt;
bch->tx_cnt += cnt;
SetRegAddr(l1->hw, A_FIFO_DATA0);
while (cnt >= 4) {
fWrite_hfc32(l1->hw, *(unsigned long *) cp);
cp += 4;
cnt -= 4;
}
while (cnt--)
fWrite_hfc8(l1->hw, *cp++);
if (bch->tx_cnt >= skb->len) {
if (bch->mode == L1_MODE_HDLC) {
/* increment f counter */
Write_hfc8(l1->hw, A_INC_RES_FIFO, 1);
}
ack_len += skb->truesize;
bch->tx_skb = NULL;
bch->tx_cnt = 0;
dev_kfree_skb(skb);
} else
/* Re-Select */
Write_hfc8(l1->hw, R_FIFO,
(l1->st_num * 8 +
((bch->bchan == 1) ? 0 : 2)));
wait_busy(l1->hw);
} while (1);
if (ack_len)
bch->b_if.ifc.l1l2((struct hisax_if *) &bch->b_if,
PH_DATA | CONFIRM, (void *) ack_len);
} /* tx_b_frame */
/*************************************/
/* bottom half handler for interrupt */
/*************************************/
static void
hfc4s8s_bh(struct work_struct *work)
{
hfc4s8s_hw *hw = container_of(work, hfc4s8s_hw, tqueue);
u_char b;
struct hfc4s8s_l1 *l1p;
volatile u_char *fifo_stat;
int idx;
/* handle layer 1 state changes */
b = 1;
l1p = hw->l1;
while (b) {
if ((b & hw->mr.r_irq_statech)) {
/* reset l1 event */
hw->mr.r_irq_statech &= ~b;
if (l1p->enabled) {
if (l1p->nt_mode) {
u_char oldstate = l1p->l1_state;
Write_hfc8(l1p->hw, R_ST_SEL,
l1p->st_num);
l1p->l1_state =
Read_hfc8(l1p->hw,
A_ST_RD_STA) & 0xf;
if ((oldstate == 3)
&& (l1p->l1_state != 3))
l1p->d_if.ifc.l1l2(&l1p->
d_if.
ifc,
PH_DEACTIVATE
|
INDICATION,
NULL);
if (l1p->l1_state != 2) {
del_timer(&l1p->l1_timer);
if (l1p->l1_state == 3) {
l1p->d_if.ifc.
l1l2(&l1p->
d_if.ifc,
PH_ACTIVATE
|
INDICATION,
NULL);
}
} else {
/* allow transition */
Write_hfc8(hw, A_ST_WR_STA,
M_SET_G2_G3);
mod_timer(&l1p->l1_timer,
jiffies +
L1_TIMER_T1);
}
printk(KERN_INFO
"HFC-4S/8S: NT ch %d l1 state %d -> %d\n",
l1p->st_num, oldstate,
l1p->l1_state);
} else {
u_char oldstate = l1p->l1_state;
Write_hfc8(l1p->hw, R_ST_SEL,
l1p->st_num);
l1p->l1_state =
Read_hfc8(l1p->hw,
A_ST_RD_STA) & 0xf;
if (((l1p->l1_state == 3) &&
((oldstate == 7) ||
(oldstate == 8))) ||
((timer_pending
(&l1p->l1_timer))
&& (l1p->l1_state == 8))) {
mod_timer(&l1p->l1_timer,
L1_TIMER_T4 +
jiffies);
} else {
if (l1p->l1_state == 7) {
del_timer(&l1p->
l1_timer);
l1p->d_if.ifc.
l1l2(&l1p->
d_if.ifc,
PH_ACTIVATE
|
INDICATION,
NULL);
tx_d_frame(l1p);
}
if (l1p->l1_state == 3) {
if (oldstate != 3)
l1p->d_if.
ifc.
l1l2
(&l1p->
d_if.
ifc,
PH_DEACTIVATE
|
INDICATION,
NULL);
}
}
printk(KERN_INFO
"HFC-4S/8S: TE %d ch %d l1 state %d -> %d\n",
l1p->hw->cardnum,
l1p->st_num, oldstate,
l1p->l1_state);
}
}
}
b <<= 1;
l1p++;
}
/* now handle the fifos */
idx = 0;
fifo_stat = hw->mr.r_irq_fifo_blx;
l1p = hw->l1;
while (idx < hw->driver_data.max_st_ports) {
if (hw->mr.timer_irq) {
*fifo_stat |= hw->mr.fifo_rx_trans_enables[idx];
if (hw->fifo_sched_cnt <= 0) {
*fifo_stat |=
hw->mr.fifo_slow_timer_service[l1p->
st_num];
}
}
/* ignore fifo 6 (TX E fifo) */
*fifo_stat &= 0xff - 0x40;
while (*fifo_stat) {
if (!l1p->nt_mode) {
/* RX Fifo has data to read */
if ((*fifo_stat & 0x20)) {
*fifo_stat &= ~0x20;
rx_d_frame(l1p, 0);
}
/* E Fifo has data to read */
if ((*fifo_stat & 0x80)) {
*fifo_stat &= ~0x80;
rx_d_frame(l1p, 1);
}
/* TX Fifo completed send */
if ((*fifo_stat & 0x10)) {
*fifo_stat &= ~0x10;
tx_d_frame(l1p);
}
}
/* B1 RX Fifo has data to read */
if ((*fifo_stat & 0x2)) {
*fifo_stat &= ~0x2;
rx_b_frame(l1p->b_ch);
}
/* B1 TX Fifo has send completed */
if ((*fifo_stat & 0x1)) {
*fifo_stat &= ~0x1;
tx_b_frame(l1p->b_ch);
}
/* B2 RX Fifo has data to read */
if ((*fifo_stat & 0x8)) {
*fifo_stat &= ~0x8;
rx_b_frame(l1p->b_ch + 1);
}
/* B2 TX Fifo has send completed */
if ((*fifo_stat & 0x4)) {
*fifo_stat &= ~0x4;
tx_b_frame(l1p->b_ch + 1);
}
}
fifo_stat++;
l1p++;
idx++;
}
if (hw->fifo_sched_cnt <= 0)
hw->fifo_sched_cnt += (1 << (7 - TRANS_TIMER_MODE));
hw->mr.timer_irq = 0; /* clear requested timer irq */
} /* hfc4s8s_bh */
/*********************/
/* interrupt handler */
/*********************/
static irqreturn_t
hfc4s8s_interrupt(int intno, void *dev_id)
{
hfc4s8s_hw *hw = dev_id;
u_char b, ovr;
volatile u_char *ovp;
int idx;
u_char old_ioreg;
if (!hw || !(hw->mr.r_irq_ctrl & M_GLOB_IRQ_EN))
return IRQ_NONE;
/* read current selected regsister */
old_ioreg = GetRegAddr(hw);
/* Layer 1 State change */
hw->mr.r_irq_statech |=
(Read_hfc8(hw, R_SCI) & hw->mr.r_irqmsk_statchg);
if (!
(b = (Read_hfc8(hw, R_STATUS) & (M_MISC_IRQSTA | M_FR_IRQSTA)))
&& !hw->mr.r_irq_statech) {
SetRegAddr(hw, old_ioreg);
return IRQ_NONE;
}
/* timer event */
if (Read_hfc8(hw, R_IRQ_MISC) & M_TI_IRQ) {
hw->mr.timer_irq = 1;
hw->fifo_sched_cnt--;
}
/* FIFO event */
if ((ovr = Read_hfc8(hw, R_IRQ_OVIEW))) {
hw->mr.r_irq_oview |= ovr;
idx = R_IRQ_FIFO_BL0;
ovp = hw->mr.r_irq_fifo_blx;
while (ovr) {
if ((ovr & 1)) {
*ovp |= Read_hfc8(hw, idx);
}
ovp++;
idx++;
ovr >>= 1;
}
}
/* queue the request to allow other cards to interrupt */
schedule_work(&hw->tqueue);
SetRegAddr(hw, old_ioreg);
return IRQ_HANDLED;
} /* hfc4s8s_interrupt */
/***********************************************************************/
/* reset the complete chip, don't release the chips irq but disable it */
/***********************************************************************/
static void
chipreset(hfc4s8s_hw *hw)
{
u_long flags;
spin_lock_irqsave(&hw->lock, flags);
Write_hfc8(hw, R_CTRL, 0); /* use internal RAM */
Write_hfc8(hw, R_RAM_MISC, 0); /* 32k*8 RAM */
Write_hfc8(hw, R_FIFO_MD, 0); /* fifo mode 386 byte/fifo simple mode */
Write_hfc8(hw, R_CIRM, M_SRES); /* reset chip */
hw->mr.r_irq_ctrl = 0; /* interrupt is inactive */
spin_unlock_irqrestore(&hw->lock, flags);
udelay(3);
Write_hfc8(hw, R_CIRM, 0); /* disable reset */
wait_busy(hw);
Write_hfc8(hw, R_PCM_MD0, M_PCM_MD); /* master mode */
Write_hfc8(hw, R_RAM_MISC, M_FZ_MD); /* transmit fifo option */
if (hw->driver_data.clock_mode == 1)
Write_hfc8(hw, R_BRG_PCM_CFG, M_PCM_CLK); /* PCM clk / 2 */
Write_hfc8(hw, R_TI_WD, TRANS_TIMER_MODE); /* timer interval */
memset(&hw->mr, 0, sizeof(hw->mr));
} /* chipreset */
/********************************************/
/* disable/enable hardware in nt or te mode */
/********************************************/
static void
hfc_hardware_enable(hfc4s8s_hw *hw, int enable, int nt_mode)
{
u_long flags;
char if_name[40];
int i;
if (enable) {
/* save system vars */
hw->nt_mode = nt_mode;
/* enable fifo and state irqs, but not global irq enable */
hw->mr.r_irq_ctrl = M_FIFO_IRQ;
Write_hfc8(hw, R_IRQ_CTRL, hw->mr.r_irq_ctrl);
hw->mr.r_irqmsk_statchg = 0;
Write_hfc8(hw, R_SCI_MSK, hw->mr.r_irqmsk_statchg);
Write_hfc8(hw, R_PWM_MD, 0x80);
Write_hfc8(hw, R_PWM1, 26);
if (!nt_mode)
Write_hfc8(hw, R_ST_SYNC, M_AUTO_SYNC);
/* enable the line interfaces and fifos */
for (i = 0; i < hw->driver_data.max_st_ports; i++) {
hw->mr.r_irqmsk_statchg |= (1 << i);
Write_hfc8(hw, R_SCI_MSK, hw->mr.r_irqmsk_statchg);
Write_hfc8(hw, R_ST_SEL, i);
Write_hfc8(hw, A_ST_CLK_DLY,
((nt_mode) ? CLKDEL_NT : CLKDEL_TE));
hw->mr.r_ctrl0 = ((nt_mode) ? CTRL0_NT : CTRL0_TE);
Write_hfc8(hw, A_ST_CTRL0, hw->mr.r_ctrl0);
Write_hfc8(hw, A_ST_CTRL2, 3);
Write_hfc8(hw, A_ST_WR_STA, 0); /* enable state machine */
hw->l1[i].enabled = 1;
hw->l1[i].nt_mode = nt_mode;
if (!nt_mode) {
/* setup E-fifo */
Write_hfc8(hw, R_FIFO, i * 8 + 7); /* E fifo */
wait_busy(hw);
Write_hfc8(hw, A_CON_HDLC, 0x11); /* HDLC mode, 1 fill, connect ST */
Write_hfc8(hw, A_SUBCH_CFG, 2); /* only 2 bits */
Write_hfc8(hw, A_IRQ_MSK, 1); /* enable interrupt */
Write_hfc8(hw, A_INC_RES_FIFO, 2); /* reset fifo */
wait_busy(hw);
/* setup D RX-fifo */
Write_hfc8(hw, R_FIFO, i * 8 + 5); /* RX fifo */
wait_busy(hw);
Write_hfc8(hw, A_CON_HDLC, 0x11); /* HDLC mode, 1 fill, connect ST */
Write_hfc8(hw, A_SUBCH_CFG, 2); /* only 2 bits */
Write_hfc8(hw, A_IRQ_MSK, 1); /* enable interrupt */
Write_hfc8(hw, A_INC_RES_FIFO, 2); /* reset fifo */
wait_busy(hw);
/* setup D TX-fifo */
Write_hfc8(hw, R_FIFO, i * 8 + 4); /* TX fifo */
wait_busy(hw);
Write_hfc8(hw, A_CON_HDLC, 0x11); /* HDLC mode, 1 fill, connect ST */
Write_hfc8(hw, A_SUBCH_CFG, 2); /* only 2 bits */
Write_hfc8(hw, A_IRQ_MSK, 1); /* enable interrupt */
Write_hfc8(hw, A_INC_RES_FIFO, 2); /* reset fifo */
wait_busy(hw);
}
sprintf(if_name, "hfc4s8s_%d%d_", hw->cardnum, i);
if (hisax_register
(&hw->l1[i].d_if, hw->l1[i].b_table, if_name,
((nt_mode) ? 3 : 2))) {
hw->l1[i].enabled = 0;
hw->mr.r_irqmsk_statchg &= ~(1 << i);
Write_hfc8(hw, R_SCI_MSK,
hw->mr.r_irqmsk_statchg);
printk(KERN_INFO
"HFC-4S/8S: Unable to register S/T device %s, break\n",
if_name);
break;
}
}
spin_lock_irqsave(&hw->lock, flags);
hw->mr.r_irq_ctrl |= M_GLOB_IRQ_EN;
Write_hfc8(hw, R_IRQ_CTRL, hw->mr.r_irq_ctrl);
spin_unlock_irqrestore(&hw->lock, flags);
} else {
/* disable hardware */
spin_lock_irqsave(&hw->lock, flags);
hw->mr.r_irq_ctrl &= ~M_GLOB_IRQ_EN;
Write_hfc8(hw, R_IRQ_CTRL, hw->mr.r_irq_ctrl);
spin_unlock_irqrestore(&hw->lock, flags);
for (i = hw->driver_data.max_st_ports - 1; i >= 0; i--) {
hw->l1[i].enabled = 0;
hisax_unregister(&hw->l1[i].d_if);
del_timer(&hw->l1[i].l1_timer);
skb_queue_purge(&hw->l1[i].d_tx_queue);
skb_queue_purge(&hw->l1[i].b_ch[0].tx_queue);
skb_queue_purge(&hw->l1[i].b_ch[1].tx_queue);
}
chipreset(hw);
}
} /* hfc_hardware_enable */
/******************************************/
/* disable memory mapped ports / io ports */
/******************************************/
static void
release_pci_ports(hfc4s8s_hw *hw)
{
pci_write_config_word(hw->pdev, PCI_COMMAND, 0);
if (hw->iobase)
release_region(hw->iobase, 8);
}
/*****************************************/
/* enable memory mapped ports / io ports */
/*****************************************/
static void
enable_pci_ports(hfc4s8s_hw *hw)
{
pci_write_config_word(hw->pdev, PCI_COMMAND, PCI_ENA_REGIO);
}
/*************************************/
/* initialise the HFC-4s/8s hardware */
/* return 0 on success. */
/*************************************/
static int
setup_instance(hfc4s8s_hw *hw)
{
int err = -EIO;
int i;
for (i = 0; i < HFC_MAX_ST; i++) {
struct hfc4s8s_l1 *l1p;
l1p = hw->l1 + i;
spin_lock_init(&l1p->lock);
l1p->hw = hw;
l1p->l1_timer.function = (void *) hfc_l1_timer;
l1p->l1_timer.data = (long) (l1p);
init_timer(&l1p->l1_timer);
l1p->st_num = i;
skb_queue_head_init(&l1p->d_tx_queue);
l1p->d_if.ifc.priv = hw->l1 + i;
l1p->d_if.ifc.l2l1 = (void *) dch_l2l1;
spin_lock_init(&l1p->b_ch[0].lock);
l1p->b_ch[0].b_if.ifc.l2l1 = (void *) bch_l2l1;
l1p->b_ch[0].b_if.ifc.priv = (void *) &l1p->b_ch[0];
l1p->b_ch[0].l1p = hw->l1 + i;
l1p->b_ch[0].bchan = 1;
l1p->b_table[0] = &l1p->b_ch[0].b_if;
skb_queue_head_init(&l1p->b_ch[0].tx_queue);
spin_lock_init(&l1p->b_ch[1].lock);
l1p->b_ch[1].b_if.ifc.l2l1 = (void *) bch_l2l1;
l1p->b_ch[1].b_if.ifc.priv = (void *) &l1p->b_ch[1];
l1p->b_ch[1].l1p = hw->l1 + i;
l1p->b_ch[1].bchan = 2;
l1p->b_table[1] = &l1p->b_ch[1].b_if;
skb_queue_head_init(&l1p->b_ch[1].tx_queue);
}
enable_pci_ports(hw);
chipreset(hw);
i = Read_hfc8(hw, R_CHIP_ID) >> CHIP_ID_SHIFT;
if (i != hw->driver_data.chip_id) {
printk(KERN_INFO
"HFC-4S/8S: invalid chip id 0x%x instead of 0x%x, card ignored\n",
i, hw->driver_data.chip_id);
goto out;
}
i = Read_hfc8(hw, R_CHIP_RV) & 0xf;
if (!i) {
printk(KERN_INFO
"HFC-4S/8S: chip revision 0 not supported, card ignored\n");
goto out;
}
INIT_WORK(&hw->tqueue, hfc4s8s_bh);
if (request_irq
(hw->irq, hfc4s8s_interrupt, IRQF_SHARED, hw->card_name, hw)) {
printk(KERN_INFO
"HFC-4S/8S: unable to alloc irq %d, card ignored\n",
hw->irq);
goto out;
}
printk(KERN_INFO
"HFC-4S/8S: found PCI card at iobase 0x%x, irq %d\n",
hw->iobase, hw->irq);
hfc_hardware_enable(hw, 1, 0);
return (0);
out:
hw->irq = 0;
release_pci_ports(hw);
kfree(hw);
return (err);
}
/*****************************************/
/* PCI hotplug interface: probe new card */
/*****************************************/
static int
hfc4s8s_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
int err = -ENOMEM;
hfc4s8s_param *driver_data = (hfc4s8s_param *) ent->driver_data;
hfc4s8s_hw *hw;
if (!(hw = kzalloc(sizeof(hfc4s8s_hw), GFP_ATOMIC))) {
printk(KERN_ERR "No kmem for HFC-4S/8S card\n");
return (err);
}
hw->pdev = pdev;
err = pci_enable_device(pdev);
if (err)
goto out;
hw->cardnum = card_cnt;
sprintf(hw->card_name, "hfc4s8s_%d", hw->cardnum);
printk(KERN_INFO "HFC-4S/8S: found adapter %s (%s) at %s\n",
driver_data->device_name, hw->card_name, pci_name(pdev));
spin_lock_init(&hw->lock);
hw->driver_data = *driver_data;
hw->irq = pdev->irq;
hw->iobase = pci_resource_start(pdev, 0);
if (!request_region(hw->iobase, 8, hw->card_name)) {
printk(KERN_INFO
"HFC-4S/8S: failed to request address space at 0x%04x\n",
hw->iobase);
goto out;
}
pci_set_drvdata(pdev, hw);
err = setup_instance(hw);
if (!err)
card_cnt++;
return (err);
out:
kfree(hw);
return (err);
}
/**************************************/
/* PCI hotplug interface: remove card */
/**************************************/
static void
hfc4s8s_remove(struct pci_dev *pdev)
{
hfc4s8s_hw *hw = pci_get_drvdata(pdev);
printk(KERN_INFO "HFC-4S/8S: removing card %d\n", hw->cardnum);
hfc_hardware_enable(hw, 0, 0);
if (hw->irq)
free_irq(hw->irq, hw);
hw->irq = 0;
release_pci_ports(hw);
card_cnt--;
pci_disable_device(pdev);
kfree(hw);
return;
}
static struct pci_driver hfc4s8s_driver = {
.name = "hfc4s8s_l1",
.probe = hfc4s8s_probe,
.remove = hfc4s8s_remove,
.id_table = hfc4s8s_ids,
};
/**********************/
/* driver Module init */
/**********************/
static int __init
hfc4s8s_module_init(void)
{
int err;
printk(KERN_INFO
"HFC-4S/8S: Layer 1 driver module for HFC-4S/8S isdn chips, %s\n",
hfc4s8s_rev);
printk(KERN_INFO
"HFC-4S/8S: (C) 2003 Cornelius Consult, www.cornelius-consult.de\n");
card_cnt = 0;
err = pci_register_driver(&hfc4s8s_driver);
if (err < 0) {
goto out;
}
printk(KERN_INFO "HFC-4S/8S: found %d cards\n", card_cnt);
return 0;
out:
return (err);
} /* hfc4s8s_init_hw */
/*************************************/
/* driver module exit : */
/* release the HFC-4s/8s hardware */
/*************************************/
static void __exit
hfc4s8s_module_exit(void)
{
pci_unregister_driver(&hfc4s8s_driver);
printk(KERN_INFO "HFC-4S/8S: module removed\n");
} /* hfc4s8s_release_hw */
module_init(hfc4s8s_module_init);
module_exit(hfc4s8s_module_exit);
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