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linux_dsm_epyc7002/drivers/isdn/hardware/mISDN/netjet.c
Julia Lawall b42d9165e1 drivers/isdn/hardware/mISDN: Use GFP_ATOMIC when a lock is held 
The function inittiger is only called from nj_init_card, where a lock is held.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@gfp exists@
identifier fn;
position p;
@@

fn(...) {
 ... when != spin_unlock_irqrestore
     when any
 GFP_KERNEL@p
 ... when any
}

@locked@
identifier gfp.fn;
@@

spin_lock_irqsave(...)
...  when != spin_unlock_irqrestore
fn(...)

@depends on locked@
position gfp.p;
@@

- GFP_KERNEL@p
+ GFP_ATOMIC
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-06-01 00:26:06 -07:00

1158 lines
28 KiB
C
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/*
* NETJet mISDN driver
*
* Author Karsten Keil <keil@isdn4linux.de>
*
* Copyright 2009 by Karsten Keil <keil@isdn4linux.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/mISDNhw.h>
#include <linux/slab.h>
#include "ipac.h"
#include "iohelper.h"
#include "netjet.h"
#include <linux/isdn/hdlc.h>
#define NETJET_REV "2.0"
enum nj_types {
NETJET_S_TJ300,
NETJET_S_TJ320,
ENTERNOW__TJ320,
};
struct tiger_dma {
size_t size;
u32 *start;
int idx;
u32 dmastart;
u32 dmairq;
u32 dmaend;
u32 dmacur;
};
struct tiger_hw;
struct tiger_ch {
struct bchannel bch;
struct tiger_hw *nj;
int idx;
int free;
int lastrx;
u16 rxstate;
u16 txstate;
struct isdnhdlc_vars hsend;
struct isdnhdlc_vars hrecv;
u8 *hsbuf;
u8 *hrbuf;
};
#define TX_INIT 0x0001
#define TX_IDLE 0x0002
#define TX_RUN 0x0004
#define TX_UNDERRUN 0x0100
#define RX_OVERRUN 0x0100
#define LOG_SIZE 64
struct tiger_hw {
struct list_head list;
struct pci_dev *pdev;
char name[MISDN_MAX_IDLEN];
enum nj_types typ;
int irq;
u32 irqcnt;
u32 base;
size_t base_s;
dma_addr_t dma;
void *dma_p;
spinlock_t lock; /* lock HW */
struct isac_hw isac;
struct tiger_dma send;
struct tiger_dma recv;
struct tiger_ch bc[2];
u8 ctrlreg;
u8 dmactrl;
u8 auxd;
u8 last_is0;
u8 irqmask0;
char log[LOG_SIZE];
};
static LIST_HEAD(Cards);
static DEFINE_RWLOCK(card_lock); /* protect Cards */
static u32 debug;
static int nj_cnt;
static void
_set_debug(struct tiger_hw *card)
{
card->isac.dch.debug = debug;
card->bc[0].bch.debug = debug;
card->bc[1].bch.debug = debug;
}
static int
set_debug(const char *val, struct kernel_param *kp)
{
int ret;
struct tiger_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(NETJET_REV);
module_param_call(debug, set_debug, param_get_uint, &debug, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Netjet debug mask");
static void
nj_disable_hwirq(struct tiger_hw *card)
{
outb(0, card->base + NJ_IRQMASK0);
outb(0, card->base + NJ_IRQMASK1);
}
static u8
ReadISAC_nj(void *p, u8 offset)
{
struct tiger_hw *card = p;
u8 ret;
card->auxd &= 0xfc;
card->auxd |= (offset >> 4) & 3;
outb(card->auxd, card->base + NJ_AUXDATA);
ret = inb(card->base + NJ_ISAC_OFF + ((offset & 0x0f) << 2));
return ret;
}
static void
WriteISAC_nj(void *p, u8 offset, u8 value)
{
struct tiger_hw *card = p;
card->auxd &= 0xfc;
card->auxd |= (offset >> 4) & 3;
outb(card->auxd, card->base + NJ_AUXDATA);
outb(value, card->base + NJ_ISAC_OFF + ((offset & 0x0f) << 2));
}
static void
ReadFiFoISAC_nj(void *p, u8 offset, u8 *data, int size)
{
struct tiger_hw *card = p;
card->auxd &= 0xfc;
outb(card->auxd, card->base + NJ_AUXDATA);
insb(card->base + NJ_ISAC_OFF, data, size);
}
static void
WriteFiFoISAC_nj(void *p, u8 offset, u8 *data, int size)
{
struct tiger_hw *card = p;
card->auxd &= 0xfc;
outb(card->auxd, card->base + NJ_AUXDATA);
outsb(card->base + NJ_ISAC_OFF, data, size);
}
static void
fill_mem(struct tiger_ch *bc, u32 idx, u32 cnt, u32 fill)
{
struct tiger_hw *card = bc->bch.hw;
u32 mask = 0xff, val;
pr_debug("%s: B%1d fill %02x len %d idx %d/%d\n", card->name,
bc->bch.nr, fill, cnt, idx, card->send.idx);
if (bc->bch.nr & 2) {
fill <<= 8;
mask <<= 8;
}
mask ^= 0xffffffff;
while (cnt--) {
val = card->send.start[idx];
val &= mask;
val |= fill;
card->send.start[idx++] = val;
if (idx >= card->send.size)
idx = 0;
}
}
static int
mode_tiger(struct tiger_ch *bc, u32 protocol)
{
struct tiger_hw *card = bc->bch.hw;
pr_debug("%s: B%1d protocol %x-->%x\n", card->name,
bc->bch.nr, bc->bch.state, protocol);
switch (protocol) {
case ISDN_P_NONE:
if (bc->bch.state == ISDN_P_NONE)
break;
fill_mem(bc, 0, card->send.size, 0xff);
bc->bch.state = protocol;
/* only stop dma and interrupts if both channels NULL */
if ((card->bc[0].bch.state == ISDN_P_NONE) &&
(card->bc[1].bch.state == ISDN_P_NONE)) {
card->dmactrl = 0;
outb(card->dmactrl, card->base + NJ_DMACTRL);
outb(0, card->base + NJ_IRQMASK0);
}
test_and_clear_bit(FLG_HDLC, &bc->bch.Flags);
test_and_clear_bit(FLG_TRANSPARENT, &bc->bch.Flags);
bc->txstate = 0;
bc->rxstate = 0;
bc->lastrx = -1;
break;
case ISDN_P_B_RAW:
test_and_set_bit(FLG_TRANSPARENT, &bc->bch.Flags);
bc->bch.state = protocol;
bc->idx = 0;
bc->free = card->send.size/2;
bc->rxstate = 0;
bc->txstate = TX_INIT | TX_IDLE;
bc->lastrx = -1;
if (!card->dmactrl) {
card->dmactrl = 1;
outb(card->dmactrl, card->base + NJ_DMACTRL);
outb(0x0f, card->base + NJ_IRQMASK0);
}
break;
case ISDN_P_B_HDLC:
test_and_set_bit(FLG_HDLC, &bc->bch.Flags);
bc->bch.state = protocol;
bc->idx = 0;
bc->free = card->send.size/2;
bc->rxstate = 0;
bc->txstate = TX_INIT | TX_IDLE;
isdnhdlc_rcv_init(&bc->hrecv, 0);
isdnhdlc_out_init(&bc->hsend, 0);
bc->lastrx = -1;
if (!card->dmactrl) {
card->dmactrl = 1;
outb(card->dmactrl, card->base + NJ_DMACTRL);
outb(0x0f, card->base + NJ_IRQMASK0);
}
break;
default:
pr_info("%s: %s protocol %x not handled\n", card->name,
__func__, protocol);
return -ENOPROTOOPT;
}
card->send.dmacur = inl(card->base + NJ_DMA_READ_ADR);
card->recv.dmacur = inl(card->base + NJ_DMA_WRITE_ADR);
card->send.idx = (card->send.dmacur - card->send.dmastart) >> 2;
card->recv.idx = (card->recv.dmacur - card->recv.dmastart) >> 2;
pr_debug("%s: %s ctrl %x irq %02x/%02x idx %d/%d\n",
card->name, __func__,
inb(card->base + NJ_DMACTRL),
inb(card->base + NJ_IRQMASK0),
inb(card->base + NJ_IRQSTAT0),
card->send.idx,
card->recv.idx);
return 0;
}
static void
nj_reset(struct tiger_hw *card)
{
outb(0xff, card->base + NJ_CTRL); /* Reset On */
mdelay(1);
/* now edge triggered for TJ320 GE 13/07/00 */
/* see comment in IRQ function */
if (card->typ == NETJET_S_TJ320) /* TJ320 */
card->ctrlreg = 0x40; /* Reset Off and status read clear */
else
card->ctrlreg = 0x00; /* Reset Off and status read clear */
outb(card->ctrlreg, card->base + NJ_CTRL);
mdelay(10);
/* configure AUX pins (all output except ISAC IRQ pin) */
card->auxd = 0;
card->dmactrl = 0;
outb(~NJ_ISACIRQ, card->base + NJ_AUXCTRL);
outb(NJ_ISACIRQ, card->base + NJ_IRQMASK1);
outb(card->auxd, card->base + NJ_AUXDATA);
}
static int
inittiger(struct tiger_hw *card)
{
int i;
card->dma_p = pci_alloc_consistent(card->pdev, NJ_DMA_SIZE,
&card->dma);
if (!card->dma_p) {
pr_info("%s: No DMA memory\n", card->name);
return -ENOMEM;
}
if ((u64)card->dma > 0xffffffff) {
pr_info("%s: DMA outside 32 bit\n", card->name);
return -ENOMEM;
}
for (i = 0; i < 2; i++) {
card->bc[i].hsbuf = kmalloc(NJ_DMA_TXSIZE, GFP_ATOMIC);
if (!card->bc[i].hsbuf) {
pr_info("%s: no B%d send buffer\n", card->name, i + 1);
return -ENOMEM;
}
card->bc[i].hrbuf = kmalloc(NJ_DMA_RXSIZE, GFP_ATOMIC);
if (!card->bc[i].hrbuf) {
pr_info("%s: no B%d recv buffer\n", card->name, i + 1);
return -ENOMEM;
}
}
memset(card->dma_p, 0xff, NJ_DMA_SIZE);
card->send.start = card->dma_p;
card->send.dmastart = (u32)card->dma;
card->send.dmaend = card->send.dmastart +
(4 * (NJ_DMA_TXSIZE - 1));
card->send.dmairq = card->send.dmastart +
(4 * ((NJ_DMA_TXSIZE / 2) - 1));
card->send.size = NJ_DMA_TXSIZE;
if (debug & DEBUG_HW)
pr_notice("%s: send buffer phy %#x - %#x - %#x virt %p"
" size %zu u32\n", card->name,
card->send.dmastart, card->send.dmairq,
card->send.dmaend, card->send.start, card->send.size);
outl(card->send.dmastart, card->base + NJ_DMA_READ_START);
outl(card->send.dmairq, card->base + NJ_DMA_READ_IRQ);
outl(card->send.dmaend, card->base + NJ_DMA_READ_END);
card->recv.start = card->dma_p + (NJ_DMA_SIZE / 2);
card->recv.dmastart = (u32)card->dma + (NJ_DMA_SIZE / 2);
card->recv.dmaend = card->recv.dmastart +
(4 * (NJ_DMA_RXSIZE - 1));
card->recv.dmairq = card->recv.dmastart +
(4 * ((NJ_DMA_RXSIZE / 2) - 1));
card->recv.size = NJ_DMA_RXSIZE;
if (debug & DEBUG_HW)
pr_notice("%s: recv buffer phy %#x - %#x - %#x virt %p"
" size %zu u32\n", card->name,
card->recv.dmastart, card->recv.dmairq,
card->recv.dmaend, card->recv.start, card->recv.size);
outl(card->recv.dmastart, card->base + NJ_DMA_WRITE_START);
outl(card->recv.dmairq, card->base + NJ_DMA_WRITE_IRQ);
outl(card->recv.dmaend, card->base + NJ_DMA_WRITE_END);
return 0;
}
static void
read_dma(struct tiger_ch *bc, u32 idx, int cnt)
{
struct tiger_hw *card = bc->bch.hw;
int i, stat;
u32 val;
u8 *p, *pn;
if (bc->lastrx == idx) {
bc->rxstate |= RX_OVERRUN;
pr_info("%s: B%1d overrun at idx %d\n", card->name,
bc->bch.nr, idx);
}
bc->lastrx = idx;
if (!bc->bch.rx_skb) {
bc->bch.rx_skb = mI_alloc_skb(bc->bch.maxlen, GFP_ATOMIC);
if (!bc->bch.rx_skb) {
pr_info("%s: B%1d receive out of memory\n",
card->name, bc->bch.nr);
return;
}
}
if (test_bit(FLG_TRANSPARENT, &bc->bch.Flags)) {
if ((bc->bch.rx_skb->len + cnt) > bc->bch.maxlen) {
pr_debug("%s: B%1d overrun %d\n", card->name,
bc->bch.nr, bc->bch.rx_skb->len + cnt);
skb_trim(bc->bch.rx_skb, 0);
return;
}
p = skb_put(bc->bch.rx_skb, cnt);
} else
p = bc->hrbuf;
for (i = 0; i < cnt; i++) {
val = card->recv.start[idx++];
if (bc->bch.nr & 2)
val >>= 8;
if (idx >= card->recv.size)
idx = 0;
p[i] = val & 0xff;
}
pn = bc->hrbuf;
next_frame:
if (test_bit(FLG_HDLC, &bc->bch.Flags)) {
stat = isdnhdlc_decode(&bc->hrecv, pn, cnt, &i,
bc->bch.rx_skb->data, bc->bch.maxlen);
if (stat > 0) /* valid frame received */
p = skb_put(bc->bch.rx_skb, stat);
else if (stat == -HDLC_CRC_ERROR)
pr_info("%s: B%1d receive frame CRC error\n",
card->name, bc->bch.nr);
else if (stat == -HDLC_FRAMING_ERROR)
pr_info("%s: B%1d receive framing error\n",
card->name, bc->bch.nr);
else if (stat == -HDLC_LENGTH_ERROR)
pr_info("%s: B%1d receive frame too long (> %d)\n",
card->name, bc->bch.nr, bc->bch.maxlen);
} else
stat = cnt;
if (stat > 0) {
if (debug & DEBUG_HW_BFIFO) {
snprintf(card->log, LOG_SIZE, "B%1d-recv %s %d ",
bc->bch.nr, card->name, stat);
print_hex_dump_bytes(card->log, DUMP_PREFIX_OFFSET,
p, stat);
}
recv_Bchannel(&bc->bch, 0);
}
if (test_bit(FLG_HDLC, &bc->bch.Flags)) {
pn += i;
cnt -= i;
if (!bc->bch.rx_skb) {
bc->bch.rx_skb = mI_alloc_skb(bc->bch.maxlen,
GFP_ATOMIC);
if (!bc->bch.rx_skb) {
pr_info("%s: B%1d receive out of memory\n",
card->name, bc->bch.nr);
return;
}
}
if (cnt > 0)
goto next_frame;
}
}
static void
recv_tiger(struct tiger_hw *card, u8 irq_stat)
{
u32 idx;
int cnt = card->recv.size / 2;
/* Note receive is via the WRITE DMA channel */
card->last_is0 &= ~NJ_IRQM0_WR_MASK;
card->last_is0 |= (irq_stat & NJ_IRQM0_WR_MASK);
if (irq_stat & NJ_IRQM0_WR_END)
idx = cnt - 1;
else
idx = card->recv.size - 1;
if (test_bit(FLG_ACTIVE, &card->bc[0].bch.Flags))
read_dma(&card->bc[0], idx, cnt);
if (test_bit(FLG_ACTIVE, &card->bc[1].bch.Flags))
read_dma(&card->bc[1], idx, cnt);
}
/* sync with current DMA address at start or after exception */
static void
resync(struct tiger_ch *bc, struct tiger_hw *card)
{
card->send.dmacur = inl(card->base | NJ_DMA_READ_ADR);
card->send.idx = (card->send.dmacur - card->send.dmastart) >> 2;
if (bc->free > card->send.size / 2)
bc->free = card->send.size / 2;
/* currently we simple sync to the next complete free area
* this hast the advantage that we have always maximum time to
* handle TX irq
*/
if (card->send.idx < ((card->send.size / 2) - 1))
bc->idx = (card->recv.size / 2) - 1;
else
bc->idx = card->recv.size - 1;
bc->txstate = TX_RUN;
pr_debug("%s: %s B%1d free %d idx %d/%d\n", card->name,
__func__, bc->bch.nr, bc->free, bc->idx, card->send.idx);
}
static int bc_next_frame(struct tiger_ch *);
static void
fill_hdlc_flag(struct tiger_ch *bc)
{
struct tiger_hw *card = bc->bch.hw;
int count, i;
u32 m, v;
u8 *p;
if (bc->free == 0)
return;
pr_debug("%s: %s B%1d %d state %x idx %d/%d\n", card->name,
__func__, bc->bch.nr, bc->free, bc->txstate,
bc->idx, card->send.idx);
if (bc->txstate & (TX_IDLE | TX_INIT | TX_UNDERRUN))
resync(bc, card);
count = isdnhdlc_encode(&bc->hsend, NULL, 0, &i,
bc->hsbuf, bc->free);
pr_debug("%s: B%1d hdlc encoded %d flags\n", card->name,
bc->bch.nr, count);
bc->free -= count;
p = bc->hsbuf;
m = (bc->bch.nr & 1) ? 0xffffff00 : 0xffff00ff;
for (i = 0; i < count; i++) {
if (bc->idx >= card->send.size)
bc->idx = 0;
v = card->send.start[bc->idx];
v &= m;
v |= (bc->bch.nr & 1) ? (u32)(p[i]) : ((u32)(p[i])) << 8;
card->send.start[bc->idx++] = v;
}
if (debug & DEBUG_HW_BFIFO) {
snprintf(card->log, LOG_SIZE, "B%1d-send %s %d ",
bc->bch.nr, card->name, count);
print_hex_dump_bytes(card->log, DUMP_PREFIX_OFFSET, p, count);
}
}
static void
fill_dma(struct tiger_ch *bc)
{
struct tiger_hw *card = bc->bch.hw;
int count, i;
u32 m, v;
u8 *p;
if (bc->free == 0)
return;
count = bc->bch.tx_skb->len - bc->bch.tx_idx;
if (count <= 0)
return;
pr_debug("%s: %s B%1d %d/%d/%d/%d state %x idx %d/%d\n", card->name,
__func__, bc->bch.nr, count, bc->free, bc->bch.tx_idx,
bc->bch.tx_skb->len, bc->txstate, bc->idx, card->send.idx);
if (bc->txstate & (TX_IDLE | TX_INIT | TX_UNDERRUN))
resync(bc, card);
p = bc->bch.tx_skb->data + bc->bch.tx_idx;
if (test_bit(FLG_HDLC, &bc->bch.Flags)) {
count = isdnhdlc_encode(&bc->hsend, p, count, &i,
bc->hsbuf, bc->free);
pr_debug("%s: B%1d hdlc encoded %d in %d\n", card->name,
bc->bch.nr, i, count);
bc->bch.tx_idx += i;
bc->free -= count;
p = bc->hsbuf;
} else {
if (count > bc->free)
count = bc->free;
bc->bch.tx_idx += count;
bc->free -= count;
}
m = (bc->bch.nr & 1) ? 0xffffff00 : 0xffff00ff;
for (i = 0; i < count; i++) {
if (bc->idx >= card->send.size)
bc->idx = 0;
v = card->send.start[bc->idx];
v &= m;
v |= (bc->bch.nr & 1) ? (u32)(p[i]) : ((u32)(p[i])) << 8;
card->send.start[bc->idx++] = v;
}
if (debug & DEBUG_HW_BFIFO) {
snprintf(card->log, LOG_SIZE, "B%1d-send %s %d ",
bc->bch.nr, card->name, count);
print_hex_dump_bytes(card->log, DUMP_PREFIX_OFFSET, p, count);
}
if (bc->free)
bc_next_frame(bc);
}
static int
bc_next_frame(struct tiger_ch *bc)
{
if (bc->bch.tx_skb && bc->bch.tx_idx < bc->bch.tx_skb->len)
fill_dma(bc);
else {
if (bc->bch.tx_skb) {
/* send confirm, on trans, free on hdlc. */
if (test_bit(FLG_TRANSPARENT, &bc->bch.Flags))
confirm_Bsend(&bc->bch);
dev_kfree_skb(bc->bch.tx_skb);
}
if (get_next_bframe(&bc->bch))
fill_dma(bc);
else
return 0;
}
return 1;
}
static void
send_tiger_bc(struct tiger_hw *card, struct tiger_ch *bc)
{
int ret;
bc->free += card->send.size / 2;
if (bc->free >= card->send.size) {
if (!(bc->txstate & (TX_UNDERRUN | TX_INIT))) {
pr_info("%s: B%1d TX underrun state %x\n", card->name,
bc->bch.nr, bc->txstate);
bc->txstate |= TX_UNDERRUN;
}
bc->free = card->send.size;
}
ret = bc_next_frame(bc);
if (!ret) {
if (test_bit(FLG_HDLC, &bc->bch.Flags)) {
fill_hdlc_flag(bc);
return;
}
pr_debug("%s: B%1d TX no data free %d idx %d/%d\n", card->name,
bc->bch.nr, bc->free, bc->idx, card->send.idx);
if (!(bc->txstate & (TX_IDLE | TX_INIT))) {
fill_mem(bc, bc->idx, bc->free, 0xff);
if (bc->free == card->send.size)
bc->txstate |= TX_IDLE;
}
}
}
static void
send_tiger(struct tiger_hw *card, u8 irq_stat)
{
int i;
/* Note send is via the READ DMA channel */
if ((irq_stat & card->last_is0) & NJ_IRQM0_RD_MASK) {
pr_info("%s: tiger warn write double dma %x/%x\n",
card->name, irq_stat, card->last_is0);
return;
} else {
card->last_is0 &= ~NJ_IRQM0_RD_MASK;
card->last_is0 |= (irq_stat & NJ_IRQM0_RD_MASK);
}
for (i = 0; i < 2; i++) {
if (test_bit(FLG_ACTIVE, &card->bc[i].bch.Flags))
send_tiger_bc(card, &card->bc[i]);
}
}
static irqreturn_t
nj_irq(int intno, void *dev_id)
{
struct tiger_hw *card = dev_id;
u8 val, s1val, s0val;
spin_lock(&card->lock);
s0val = inb(card->base | NJ_IRQSTAT0);
s1val = inb(card->base | NJ_IRQSTAT1);
if ((s1val & NJ_ISACIRQ) && (s0val == 0)) {
/* shared IRQ */
spin_unlock(&card->lock);
return IRQ_NONE;
}
pr_debug("%s: IRQSTAT0 %02x IRQSTAT1 %02x\n", card->name, s0val, s1val);
card->irqcnt++;
if (!(s1val & NJ_ISACIRQ)) {
val = ReadISAC_nj(card, ISAC_ISTA);
if (val)
mISDNisac_irq(&card->isac, val);
}
if (s0val)
/* write to clear */
outb(s0val, card->base | NJ_IRQSTAT0);
else
goto end;
s1val = s0val;
/* set bits in sval to indicate which page is free */
card->recv.dmacur = inl(card->base | NJ_DMA_WRITE_ADR);
card->recv.idx = (card->recv.dmacur - card->recv.dmastart) >> 2;
if (card->recv.dmacur < card->recv.dmairq)
s0val = 0x08; /* the 2nd write area is free */
else
s0val = 0x04; /* the 1st write area is free */
card->send.dmacur = inl(card->base | NJ_DMA_READ_ADR);
card->send.idx = (card->send.dmacur - card->send.dmastart) >> 2;
if (card->send.dmacur < card->send.dmairq)
s0val |= 0x02; /* the 2nd read area is free */
else
s0val |= 0x01; /* the 1st read area is free */
pr_debug("%s: DMA Status %02x/%02x/%02x %d/%d\n", card->name,
s1val, s0val, card->last_is0,
card->recv.idx, card->send.idx);
/* test if we have a DMA interrupt */
if (s0val != card->last_is0) {
if ((s0val & NJ_IRQM0_RD_MASK) !=
(card->last_is0 & NJ_IRQM0_RD_MASK))
/* got a write dma int */
send_tiger(card, s0val);
if ((s0val & NJ_IRQM0_WR_MASK) !=
(card->last_is0 & NJ_IRQM0_WR_MASK))
/* got a read dma int */
recv_tiger(card, s0val);
}
end:
spin_unlock(&card->lock);
return IRQ_HANDLED;
}
static int
nj_l2l1B(struct mISDNchannel *ch, struct sk_buff *skb)
{
int ret = -EINVAL;
struct bchannel *bch = container_of(ch, struct bchannel, ch);
struct tiger_ch *bc = container_of(bch, struct tiger_ch, bch);
struct tiger_hw *card = bch->hw;
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 = bchannel_senddata(bch, skb);
if (ret > 0) { /* direct TX */
id = hh->id; /* skb can be freed */
fill_dma(bc);
ret = 0;
spin_unlock_irqrestore(&card->lock, flags);
if (!test_bit(FLG_TRANSPARENT, &bch->Flags))
queue_ch_frame(ch, PH_DATA_CNF, id, NULL);
} else
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 = mode_tiger(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);
mode_tiger(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;
}
if (!ret)
dev_kfree_skb(skb);
return ret;
}
static int
channel_bctrl(struct tiger_ch *bc, struct mISDN_ctrl_req *cq)
{
int ret = 0;
struct tiger_hw *card = bc->bch.hw;
switch (cq->op) {
case MISDN_CTRL_GETOP:
cq->op = 0;
break;
/* Nothing implemented yet */
case MISDN_CTRL_FILL_EMPTY:
default:
pr_info("%s: %s unknown Op %x\n", card->name, __func__, cq->op);
ret = -EINVAL;
break;
}
return ret;
}
static int
nj_bctrl(struct mISDNchannel *ch, u32 cmd, void *arg)
{
struct bchannel *bch = container_of(ch, struct bchannel, ch);
struct tiger_ch *bc = container_of(bch, struct tiger_ch, bch);
struct tiger_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);
if (test_bit(FLG_ACTIVE, &bch->Flags)) {
spin_lock_irqsave(&card->lock, flags);
mISDN_freebchannel(bch);
test_and_clear_bit(FLG_TX_BUSY, &bch->Flags);
test_and_clear_bit(FLG_ACTIVE, &bch->Flags);
mode_tiger(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(bc, arg);
break;
default:
pr_info("%s: %s unknown prim(%x)\n", card->name, __func__, cmd);
}
return ret;
}
static int
channel_ctrl(struct tiger_hw *card, struct mISDN_ctrl_req *cq)
{
int ret = 0;
switch (cq->op) {
case MISDN_CTRL_GETOP:
cq->op = MISDN_CTRL_LOOP;
break;
case MISDN_CTRL_LOOP:
/* cq->channel: 0 disable, 1 B1 loop 2 B2 loop, 3 both */
if (cq->channel < 0 || cq->channel > 3) {
ret = -EINVAL;
break;
}
ret = card->isac.ctrl(&card->isac, HW_TESTLOOP, cq->channel);
break;
default:
pr_info("%s: %s unknown Op %x\n", card->name, __func__, cq->op);
ret = -EINVAL;
break;
}
return ret;
}
static int
open_bchannel(struct tiger_hw *card, struct channel_req *rq)
{
struct bchannel *bch;
if (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 */
test_and_clear_bit(FLG_FILLEMPTY, &bch->Flags);
bch->ch.protocol = rq->protocol;
rq->ch = &bch->ch;
return 0;
}
/*
* device control function
*/
static int
nj_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 tiger_hw *card = dch->hw;
struct channel_req *rq;
int err = 0;
pr_debug("%s: %s cmd:%x %p\n", card->name, __func__, cmd, arg);
switch (cmd) {
case OPEN_CHANNEL:
rq = arg;
if (rq->protocol == ISDN_P_TE_S0)
err = card->isac.open(&card->isac, rq);
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: %s unknown command %x\n",
card->name, __func__, cmd);
return -EINVAL;
}
return err;
}
static int
nj_init_card(struct tiger_hw *card)
{
u_long flags;
int ret;
spin_lock_irqsave(&card->lock, flags);
nj_disable_hwirq(card);
spin_unlock_irqrestore(&card->lock, flags);
card->irq = card->pdev->irq;
if (request_irq(card->irq, nj_irq, IRQF_SHARED, card->name, card)) {
pr_info("%s: couldn't get interrupt %d\n",
card->name, card->irq);
card->irq = -1;
return -EIO;
}
spin_lock_irqsave(&card->lock, flags);
nj_reset(card);
ret = card->isac.init(&card->isac);
if (ret)
goto error;
ret = inittiger(card);
if (ret)
goto error;
mode_tiger(&card->bc[0], ISDN_P_NONE);
mode_tiger(&card->bc[1], ISDN_P_NONE);
error:
spin_unlock_irqrestore(&card->lock, flags);
return ret;
}
static void
nj_release(struct tiger_hw *card)
{
u_long flags;
int i;
if (card->base_s) {
spin_lock_irqsave(&card->lock, flags);
nj_disable_hwirq(card);
mode_tiger(&card->bc[0], ISDN_P_NONE);
mode_tiger(&card->bc[1], ISDN_P_NONE);
card->isac.release(&card->isac);
spin_unlock_irqrestore(&card->lock, flags);
release_region(card->base, card->base_s);
card->base_s = 0;
}
if (card->irq > 0)
free_irq(card->irq, card);
if (card->isac.dch.dev.dev.class)
mISDN_unregister_device(&card->isac.dch.dev);
for (i = 0; i < 2; i++) {
mISDN_freebchannel(&card->bc[i].bch);
kfree(card->bc[i].hsbuf);
kfree(card->bc[i].hrbuf);
}
if (card->dma_p)
pci_free_consistent(card->pdev, NJ_DMA_SIZE,
card->dma_p, card->dma);
write_lock_irqsave(&card_lock, flags);
list_del(&card->list);
write_unlock_irqrestore(&card_lock, flags);
pci_clear_master(card->pdev);
pci_disable_device(card->pdev);
pci_set_drvdata(card->pdev, NULL);
kfree(card);
}
static int
nj_setup(struct tiger_hw *card)
{
card->base = pci_resource_start(card->pdev, 0);
card->base_s = pci_resource_len(card->pdev, 0);
if (!request_region(card->base, card->base_s, card->name)) {
pr_info("%s: NETjet config port %#x-%#x already in use\n",
card->name, card->base,
(u32)(card->base + card->base_s - 1));
card->base_s = 0;
return -EIO;
}
ASSIGN_FUNC(nj, ISAC, card->isac);
return 0;
}
static int __devinit
setup_instance(struct tiger_hw *card)
{
int i, err;
u_long flags;
snprintf(card->name, MISDN_MAX_IDLEN - 1, "netjet.%d", nj_cnt + 1);
write_lock_irqsave(&card_lock, flags);
list_add_tail(&card->list, &Cards);
write_unlock_irqrestore(&card_lock, flags);
_set_debug(card);
card->isac.name = card->name;
spin_lock_init(&card->lock);
card->isac.hwlock = &card->lock;
mISDNisac_init(&card->isac, card);
card->isac.dch.dev.Bprotocols = (1 << (ISDN_P_B_RAW & ISDN_P_B_MASK)) |
(1 << (ISDN_P_B_HDLC & ISDN_P_B_MASK));
card->isac.dch.dev.D.ctrl = nj_dctrl;
for (i = 0; i < 2; i++) {
card->bc[i].bch.nr = i + 1;
set_channelmap(i + 1, card->isac.dch.dev.channelmap);
mISDN_initbchannel(&card->bc[i].bch, MAX_DATA_MEM);
card->bc[i].bch.hw = card;
card->bc[i].bch.ch.send = nj_l2l1B;
card->bc[i].bch.ch.ctrl = nj_bctrl;
card->bc[i].bch.ch.nr = i + 1;
list_add(&card->bc[i].bch.ch.list,
&card->isac.dch.dev.bchannels);
card->bc[i].bch.hw = card;
}
err = nj_setup(card);
if (err)
goto error;
err = mISDN_register_device(&card->isac.dch.dev, &card->pdev->dev,
card->name);
if (err)
goto error;
err = nj_init_card(card);
if (!err) {
nj_cnt++;
pr_notice("Netjet %d cards installed\n", nj_cnt);
return 0;
}
error:
nj_release(card);
return err;
}
static int __devinit
nj_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
int err = -ENOMEM;
int cfg;
struct tiger_hw *card;
if (pdev->subsystem_vendor == 0x8086 &&
pdev->subsystem_device == 0x0003) {
pr_notice("Netjet: Digium X100P/X101P not handled\n");
return -ENODEV;
}
if (pdev->subsystem_vendor == 0x55 &&
pdev->subsystem_device == 0x02) {
pr_notice("Netjet: Enter!Now not handled yet\n");
return -ENODEV;
}
card = kzalloc(sizeof(struct tiger_hw), GFP_ATOMIC);
if (!card) {
pr_info("No kmem for Netjet\n");
return err;
}
card->pdev = pdev;
err = pci_enable_device(pdev);
if (err) {
kfree(card);
return err;
}
printk(KERN_INFO "nj_probe(mISDN): found adapter at %s\n",
pci_name(pdev));
pci_set_master(pdev);
/* the TJ300 and TJ320 must be detected, the IRQ handling is different
* unfortunately the chips use the same device ID, but the TJ320 has
* the bit20 in status PCI cfg register set
*/
pci_read_config_dword(pdev, 0x04, &cfg);
if (cfg & 0x00100000)
card->typ = NETJET_S_TJ320;
else
card->typ = NETJET_S_TJ300;
card->base = pci_resource_start(pdev, 0);
card->irq = pdev->irq;
pci_set_drvdata(pdev, card);
err = setup_instance(card);
if (err)
pci_set_drvdata(pdev, NULL);
return err;
}
static void __devexit nj_remove(struct pci_dev *pdev)
{
struct tiger_hw *card = pci_get_drvdata(pdev);
if (card)
nj_release(card);
else
pr_info("%s drvdata already removed\n", __func__);
}
/* We cannot select cards with PCI_SUB... IDs, since here are cards with
* SUB IDs set to PCI_ANY_ID, so we need to match all and reject
* known other cards which not work with this driver - see probe function */
static struct pci_device_id nj_pci_ids[] __devinitdata = {
{ PCI_VENDOR_ID_TIGERJET, PCI_DEVICE_ID_TIGERJET_300,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
{ }
};
MODULE_DEVICE_TABLE(pci, nj_pci_ids);
static struct pci_driver nj_driver = {
.name = "netjet",
.probe = nj_probe,
.remove = __devexit_p(nj_remove),
.id_table = nj_pci_ids,
};
static int __init nj_init(void)
{
int err;
pr_notice("Netjet PCI driver Rev. %s\n", NETJET_REV);
err = pci_register_driver(&nj_driver);
return err;
}
static void __exit nj_cleanup(void)
{
pci_unregister_driver(&nj_driver);
}
module_init(nj_init);
module_exit(nj_cleanup);
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