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linux/drivers/isdn/hardware/avm/t1isa.c
Johannes Berg 59ae1d127a networking: introduce and use skb_put_data() 
A common pattern with skb_put() is to just want to memcpy()
some data into the new space, introduce skb_put_data() for
this.

An spatch similar to the one for skb_put_zero() converts many
of the places using it:

    @@
    identifier p, p2;
    expression len, skb, data;
    type t, t2;
    @@
    (
    -p = skb_put(skb, len);
    +p = skb_put_data(skb, data, len);
    |
    -p = (t)skb_put(skb, len);
    +p = skb_put_data(skb, data, len);
    )
    (
    p2 = (t2)p;
    -memcpy(p2, data, len);
    |
    -memcpy(p, data, len);
    )

    @@
    type t, t2;
    identifier p, p2;
    expression skb, data;
    @@
    t *p;
    ...
    (
    -p = skb_put(skb, sizeof(t));
    +p = skb_put_data(skb, data, sizeof(t));
    |
    -p = (t *)skb_put(skb, sizeof(t));
    +p = skb_put_data(skb, data, sizeof(t));
    )
    (
    p2 = (t2)p;
    -memcpy(p2, data, sizeof(*p));
    |
    -memcpy(p, data, sizeof(*p));
    )

    @@
    expression skb, len, data;
    @@
    -memcpy(skb_put(skb, len), data, len);
    +skb_put_data(skb, data, len);

(again, manually post-processed to retain some comments)

Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-16 11:48:37 -04:00

595 lines
15 KiB
C
Raw Blame History

/* $Id: t1isa.c,v 1.1.2.3 2004/02/10 01:07:12 keil Exp $
*
* Module for AVM T1 HEMA-card.
*
* Copyright 1999 by Carsten Paeth <calle@calle.de>
*
* This software may be used and distributed according to the terms
* of the GNU General Public License, incorporated herein by reference.
*
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/skbuff.h>
#include <linux/delay.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/capi.h>
#include <linux/netdevice.h>
#include <linux/kernelcapi.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/gfp.h>
#include <asm/io.h>
#include <linux/isdn/capicmd.h>
#include <linux/isdn/capiutil.h>
#include <linux/isdn/capilli.h>
#include "avmcard.h"
/* ------------------------------------------------------------- */
static char *revision = "$Revision: 1.1.2.3 $";
/* ------------------------------------------------------------- */
MODULE_DESCRIPTION("CAPI4Linux: Driver for AVM T1 HEMA ISA card");
MODULE_AUTHOR("Carsten Paeth");
MODULE_LICENSE("GPL");
/* ------------------------------------------------------------- */
static int hema_irq_table[16] =
{0,
0,
0,
0x80, /* irq 3 */
0,
0x90, /* irq 5 */
0,
0xA0, /* irq 7 */
0,
0xB0, /* irq 9 */
0xC0, /* irq 10 */
0xD0, /* irq 11 */
0xE0, /* irq 12 */
0,
0,
0xF0, /* irq 15 */
};
static int t1_detectandinit(unsigned int base, unsigned irq, int cardnr)
{
unsigned char cregs[8];
unsigned char reverse_cardnr;
unsigned char dummy;
int i;
reverse_cardnr = ((cardnr & 0x01) << 3) | ((cardnr & 0x02) << 1)
| ((cardnr & 0x04) >> 1) | ((cardnr & 0x08) >> 3);
cregs[0] = (HEMA_VERSION_ID << 4) | (reverse_cardnr & 0xf);
cregs[1] = 0x00; /* fast & slow link connected to CON1 */
cregs[2] = 0x05; /* fast link 20MBit, slow link 20 MBit */
cregs[3] = 0;
cregs[4] = 0x11; /* zero wait state */
cregs[5] = hema_irq_table[irq & 0xf];
cregs[6] = 0;
cregs[7] = 0;
/*
* no one else should use the ISA bus in this moment,
* but no function there to prevent this :-(
* save_flags(flags); cli();
*/
/* board reset */
t1outp(base, T1_RESETBOARD, 0xf);
mdelay(100);
dummy = t1inp(base, T1_FASTLINK + T1_OUTSTAT); /* first read */
/* write config */
dummy = (base >> 4) & 0xff;
for (i = 1; i <= 0xf; i++) t1outp(base, i, dummy);
t1outp(base, HEMA_PAL_ID & 0xf, dummy);
t1outp(base, HEMA_PAL_ID >> 4, cregs[0]);
for (i = 1; i < 7; i++) t1outp(base, 0, cregs[i]);
t1outp(base, ((base >> 4)) & 0x3, cregs[7]);
/* restore_flags(flags); */
mdelay(100);
t1outp(base, T1_FASTLINK + T1_RESETLINK, 0);
t1outp(base, T1_SLOWLINK + T1_RESETLINK, 0);
mdelay(10);
t1outp(base, T1_FASTLINK + T1_RESETLINK, 1);
t1outp(base, T1_SLOWLINK + T1_RESETLINK, 1);
mdelay(100);
t1outp(base, T1_FASTLINK + T1_RESETLINK, 0);
t1outp(base, T1_SLOWLINK + T1_RESETLINK, 0);
mdelay(10);
t1outp(base, T1_FASTLINK + T1_ANALYSE, 0);
mdelay(5);
t1outp(base, T1_SLOWLINK + T1_ANALYSE, 0);
if (t1inp(base, T1_FASTLINK + T1_OUTSTAT) != 0x1) /* tx empty */
return 1;
if (t1inp(base, T1_FASTLINK + T1_INSTAT) != 0x0) /* rx empty */
return 2;
if (t1inp(base, T1_FASTLINK + T1_IRQENABLE) != 0x0)
return 3;
if ((t1inp(base, T1_FASTLINK + T1_FIFOSTAT) & 0xf0) != 0x70)
return 4;
if ((t1inp(base, T1_FASTLINK + T1_IRQMASTER) & 0x0e) != 0)
return 5;
if ((t1inp(base, T1_FASTLINK + T1_IDENT) & 0x7d) != 1)
return 6;
if (t1inp(base, T1_SLOWLINK + T1_OUTSTAT) != 0x1) /* tx empty */
return 7;
if ((t1inp(base, T1_SLOWLINK + T1_IRQMASTER) & 0x0e) != 0)
return 8;
if ((t1inp(base, T1_SLOWLINK + T1_IDENT) & 0x7d) != 0)
return 9;
return 0;
}
static irqreturn_t t1isa_interrupt(int interrupt, void *devptr)
{
avmcard *card = devptr;
avmctrl_info *cinfo = &card->ctrlinfo[0];
struct capi_ctr *ctrl = &cinfo->capi_ctrl;
unsigned char b1cmd;
struct sk_buff *skb;
unsigned ApplId;
unsigned MsgLen;
unsigned DataB3Len;
unsigned NCCI;
unsigned WindowSize;
unsigned long flags;
spin_lock_irqsave(&card->lock, flags);
while (b1_rx_full(card->port)) {
b1cmd = b1_get_byte(card->port);
switch (b1cmd) {
case RECEIVE_DATA_B3_IND:
ApplId = (unsigned) b1_get_word(card->port);
MsgLen = t1_get_slice(card->port, card->msgbuf);
DataB3Len = t1_get_slice(card->port, card->databuf);
spin_unlock_irqrestore(&card->lock, flags);
if (MsgLen < 30) { /* not CAPI 64Bit */
memset(card->msgbuf + MsgLen, 0, 30 - MsgLen);
MsgLen = 30;
CAPIMSG_SETLEN(card->msgbuf, 30);
}
if (!(skb = alloc_skb(DataB3Len + MsgLen, GFP_ATOMIC))) {
printk(KERN_ERR "%s: incoming packet dropped\n",
card->name);
} else {
skb_put_data(skb, card->msgbuf, MsgLen);
skb_put_data(skb, card->databuf, DataB3Len);
capi_ctr_handle_message(ctrl, ApplId, skb);
}
break;
case RECEIVE_MESSAGE:
ApplId = (unsigned) b1_get_word(card->port);
MsgLen = t1_get_slice(card->port, card->msgbuf);
if (!(skb = alloc_skb(MsgLen, GFP_ATOMIC))) {
spin_unlock_irqrestore(&card->lock, flags);
printk(KERN_ERR "%s: incoming packet dropped\n",
card->name);
} else {
skb_put_data(skb, card->msgbuf, MsgLen);
if (CAPIMSG_CMD(skb->data) == CAPI_DATA_B3)
capilib_data_b3_conf(&cinfo->ncci_head, ApplId,
CAPIMSG_NCCI(skb->data),
CAPIMSG_MSGID(skb->data));
spin_unlock_irqrestore(&card->lock, flags);
capi_ctr_handle_message(ctrl, ApplId, skb);
}
break;
case RECEIVE_NEW_NCCI:
ApplId = b1_get_word(card->port);
NCCI = b1_get_word(card->port);
WindowSize = b1_get_word(card->port);
capilib_new_ncci(&cinfo->ncci_head, ApplId, NCCI, WindowSize);
spin_unlock_irqrestore(&card->lock, flags);
break;
case RECEIVE_FREE_NCCI:
ApplId = b1_get_word(card->port);
NCCI = b1_get_word(card->port);
if (NCCI != 0xffffffff)
capilib_free_ncci(&cinfo->ncci_head, ApplId, NCCI);
spin_unlock_irqrestore(&card->lock, flags);
break;
case RECEIVE_START:
b1_put_byte(card->port, SEND_POLLACK);
spin_unlock_irqrestore(&card->lock, flags);
capi_ctr_resume_output(ctrl);
break;
case RECEIVE_STOP:
spin_unlock_irqrestore(&card->lock, flags);
capi_ctr_suspend_output(ctrl);
break;
case RECEIVE_INIT:
cinfo->versionlen = t1_get_slice(card->port, cinfo->versionbuf);
spin_unlock_irqrestore(&card->lock, flags);
b1_parse_version(cinfo);
printk(KERN_INFO "%s: %s-card (%s) now active\n",
card->name,
cinfo->version[VER_CARDTYPE],
cinfo->version[VER_DRIVER]);
capi_ctr_ready(ctrl);
break;
case RECEIVE_TASK_READY:
ApplId = (unsigned) b1_get_word(card->port);
MsgLen = t1_get_slice(card->port, card->msgbuf);
spin_unlock_irqrestore(&card->lock, flags);
card->msgbuf[MsgLen] = 0;
while (MsgLen > 0
&& (card->msgbuf[MsgLen - 1] == '\n'
|| card->msgbuf[MsgLen - 1] == '\r')) {
card->msgbuf[MsgLen - 1] = 0;
MsgLen--;
}
printk(KERN_INFO "%s: task %d \"%s\" ready.\n",
card->name, ApplId, card->msgbuf);
break;
case RECEIVE_DEBUGMSG:
MsgLen = t1_get_slice(card->port, card->msgbuf);
spin_unlock_irqrestore(&card->lock, flags);
card->msgbuf[MsgLen] = 0;
while (MsgLen > 0
&& (card->msgbuf[MsgLen - 1] == '\n'
|| card->msgbuf[MsgLen - 1] == '\r')) {
card->msgbuf[MsgLen - 1] = 0;
MsgLen--;
}
printk(KERN_INFO "%s: DEBUG: %s\n", card->name, card->msgbuf);
break;
case 0xff:
spin_unlock_irqrestore(&card->lock, flags);
printk(KERN_ERR "%s: card reseted ?\n", card->name);
return IRQ_HANDLED;
default:
spin_unlock_irqrestore(&card->lock, flags);
printk(KERN_ERR "%s: b1_interrupt: 0x%x ???\n",
card->name, b1cmd);
return IRQ_NONE;
}
}
return IRQ_HANDLED;
}
/* ------------------------------------------------------------- */
static int t1isa_load_firmware(struct capi_ctr *ctrl, capiloaddata *data)
{
avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
avmcard *card = cinfo->card;
unsigned int port = card->port;
unsigned long flags;
int retval;
t1_disable_irq(port);
b1_reset(port);
if ((retval = b1_load_t4file(card, &data->firmware))) {
b1_reset(port);
printk(KERN_ERR "%s: failed to load t4file!!\n",
card->name);
return retval;
}
if (data->configuration.len > 0 && data->configuration.data) {
if ((retval = b1_load_config(card, &data->configuration))) {
b1_reset(port);
printk(KERN_ERR "%s: failed to load config!!\n",
card->name);
return retval;
}
}
if (!b1_loaded(card)) {
printk(KERN_ERR "%s: failed to load t4file.\n", card->name);
return -EIO;
}
spin_lock_irqsave(&card->lock, flags);
b1_setinterrupt(port, card->irq, card->cardtype);
b1_put_byte(port, SEND_INIT);
b1_put_word(port, CAPI_MAXAPPL);
b1_put_word(port, AVM_NCCI_PER_CHANNEL * 30);
b1_put_word(port, ctrl->cnr - 1);
spin_unlock_irqrestore(&card->lock, flags);
return 0;
}
static void t1isa_reset_ctr(struct capi_ctr *ctrl)
{
avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
avmcard *card = cinfo->card;
unsigned int port = card->port;
unsigned long flags;
t1_disable_irq(port);
b1_reset(port);
b1_reset(port);
memset(cinfo->version, 0, sizeof(cinfo->version));
spin_lock_irqsave(&card->lock, flags);
capilib_release(&cinfo->ncci_head);
spin_unlock_irqrestore(&card->lock, flags);
capi_ctr_down(ctrl);
}
static void t1isa_remove(struct pci_dev *pdev)
{
avmctrl_info *cinfo = pci_get_drvdata(pdev);
avmcard *card;
if (!cinfo)
return;
card = cinfo->card;
t1_disable_irq(card->port);
b1_reset(card->port);
b1_reset(card->port);
t1_reset(card->port);
detach_capi_ctr(&cinfo->capi_ctrl);
free_irq(card->irq, card);
release_region(card->port, AVMB1_PORTLEN);
b1_free_card(card);
}
/* ------------------------------------------------------------- */
static u16 t1isa_send_message(struct capi_ctr *ctrl, struct sk_buff *skb);
static char *t1isa_procinfo(struct capi_ctr *ctrl);
static int t1isa_probe(struct pci_dev *pdev, int cardnr)
{
avmctrl_info *cinfo;
avmcard *card;
int retval;
card = b1_alloc_card(1);
if (!card) {
printk(KERN_WARNING "t1isa: no memory.\n");
retval = -ENOMEM;
goto err;
}
cinfo = card->ctrlinfo;
card->port = pci_resource_start(pdev, 0);
card->irq = pdev->irq;
card->cardtype = avm_t1isa;
card->cardnr = cardnr;
sprintf(card->name, "t1isa-%x", card->port);
if (!(((card->port & 0x7) == 0) && ((card->port & 0x30) != 0x30))) {
printk(KERN_WARNING "t1isa: invalid port 0x%x.\n", card->port);
retval = -EINVAL;
goto err_free;
}
if (hema_irq_table[card->irq & 0xf] == 0) {
printk(KERN_WARNING "t1isa: irq %d not valid.\n", card->irq);
retval = -EINVAL;
goto err_free;
}
if (!request_region(card->port, AVMB1_PORTLEN, card->name)) {
printk(KERN_INFO "t1isa: ports 0x%03x-0x%03x in use.\n",
card->port, card->port + AVMB1_PORTLEN);
retval = -EBUSY;
goto err_free;
}
retval = request_irq(card->irq, t1isa_interrupt, 0, card->name, card);
if (retval) {
printk(KERN_INFO "t1isa: unable to get IRQ %d.\n", card->irq);
retval = -EBUSY;
goto err_release_region;
}
if ((retval = t1_detectandinit(card->port, card->irq, card->cardnr)) != 0) {
printk(KERN_INFO "t1isa: NO card at 0x%x (%d)\n",
card->port, retval);
retval = -ENODEV;
goto err_free_irq;
}
t1_disable_irq(card->port);
b1_reset(card->port);
cinfo->capi_ctrl.owner = THIS_MODULE;
cinfo->capi_ctrl.driver_name = "t1isa";
cinfo->capi_ctrl.driverdata = cinfo;
cinfo->capi_ctrl.register_appl = b1_register_appl;
cinfo->capi_ctrl.release_appl = b1_release_appl;
cinfo->capi_ctrl.send_message = t1isa_send_message;
cinfo->capi_ctrl.load_firmware = t1isa_load_firmware;
cinfo->capi_ctrl.reset_ctr = t1isa_reset_ctr;
cinfo->capi_ctrl.procinfo = t1isa_procinfo;
cinfo->capi_ctrl.proc_fops = &b1ctl_proc_fops;
strcpy(cinfo->capi_ctrl.name, card->name);
retval = attach_capi_ctr(&cinfo->capi_ctrl);
if (retval) {
printk(KERN_INFO "t1isa: attach controller failed.\n");
goto err_free_irq;
}
printk(KERN_INFO "t1isa: AVM T1 ISA at i/o %#x, irq %d, card %d\n",
card->port, card->irq, card->cardnr);
pci_set_drvdata(pdev, cinfo);
return 0;
err_free_irq:
free_irq(card->irq, card);
err_release_region:
release_region(card->port, AVMB1_PORTLEN);
err_free:
b1_free_card(card);
err:
return retval;
}
static u16 t1isa_send_message(struct capi_ctr *ctrl, struct sk_buff *skb)
{
avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
avmcard *card = cinfo->card;
unsigned int port = card->port;
unsigned long flags;
u16 len = CAPIMSG_LEN(skb->data);
u8 cmd = CAPIMSG_COMMAND(skb->data);
u8 subcmd = CAPIMSG_SUBCOMMAND(skb->data);
u16 dlen, retval;
spin_lock_irqsave(&card->lock, flags);
if (CAPICMD(cmd, subcmd) == CAPI_DATA_B3_REQ) {
retval = capilib_data_b3_req(&cinfo->ncci_head,
CAPIMSG_APPID(skb->data),
CAPIMSG_NCCI(skb->data),
CAPIMSG_MSGID(skb->data));
if (retval != CAPI_NOERROR) {
spin_unlock_irqrestore(&card->lock, flags);
return retval;
}
dlen = CAPIMSG_DATALEN(skb->data);
b1_put_byte(port, SEND_DATA_B3_REQ);
t1_put_slice(port, skb->data, len);
t1_put_slice(port, skb->data + len, dlen);
} else {
b1_put_byte(port, SEND_MESSAGE);
t1_put_slice(port, skb->data, len);
}
spin_unlock_irqrestore(&card->lock, flags);
dev_kfree_skb_any(skb);
return CAPI_NOERROR;
}
/* ------------------------------------------------------------- */
static char *t1isa_procinfo(struct capi_ctr *ctrl)
{
avmctrl_info *cinfo = (avmctrl_info *)(ctrl->driverdata);
if (!cinfo)
return "";
sprintf(cinfo->infobuf, "%s %s 0x%x %d %d",
cinfo->cardname[0] ? cinfo->cardname : "-",
cinfo->version[VER_DRIVER] ? cinfo->version[VER_DRIVER] : "-",
cinfo->card ? cinfo->card->port : 0x0,
cinfo->card ? cinfo->card->irq : 0,
cinfo->card ? cinfo->card->cardnr : 0
);
return cinfo->infobuf;
}
/* ------------------------------------------------------------- */
#define MAX_CARDS 4
static struct pci_dev isa_dev[MAX_CARDS];
static int io[MAX_CARDS];
static int irq[MAX_CARDS];
static int cardnr[MAX_CARDS];
module_param_hw_array(io, int, ioport, NULL, 0);
module_param_hw_array(irq, int, irq, NULL, 0);
module_param_array(cardnr, int, NULL, 0);
MODULE_PARM_DESC(io, "I/O base address(es)");
MODULE_PARM_DESC(irq, "IRQ number(s) (assigned)");
MODULE_PARM_DESC(cardnr, "Card number(s) (as jumpered)");
static int t1isa_add_card(struct capi_driver *driver, capicardparams *data)
{
int i;
for (i = 0; i < MAX_CARDS; i++) {
if (isa_dev[i].resource[0].start)
continue;
isa_dev[i].resource[0].start = data->port;
isa_dev[i].irq = data->irq;
if (t1isa_probe(&isa_dev[i], data->cardnr) == 0)
return 0;
}
return -ENODEV;
}
static struct capi_driver capi_driver_t1isa = {
.name = "t1isa",
.revision = "1.0",
.add_card = t1isa_add_card,
};
static int __init t1isa_init(void)
{
char rev[32];
char *p;
int i;
if ((p = strchr(revision, ':')) != NULL && p[1]) {
strlcpy(rev, p + 2, 32);
if ((p = strchr(rev, '$')) != NULL && p > rev)
*(p - 1) = 0;
} else
strcpy(rev, "1.0");
for (i = 0; i < MAX_CARDS; i++) {
if (!io[i])
break;
isa_dev[i].resource[0].start = io[i];
isa_dev[i].irq = irq[i];
if (t1isa_probe(&isa_dev[i], cardnr[i]) != 0)
return -ENODEV;
}
strlcpy(capi_driver_t1isa.revision, rev, 32);
register_capi_driver(&capi_driver_t1isa);
printk(KERN_INFO "t1isa: revision %s\n", rev);
return 0;
}
static void __exit t1isa_exit(void)
{
int i;
unregister_capi_driver(&capi_driver_t1isa);
for (i = 0; i < MAX_CARDS; i++) {
if (!io[i])
break;
t1isa_remove(&isa_dev[i]);
}
}
module_init(t1isa_init);
module_exit(t1isa_exit);
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