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path: root/drivers/net/hamradio/baycom_epp.c
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Diffstat (limited to 'drivers/net/hamradio/baycom_epp.c')
-rw-r--r--drivers/net/hamradio/baycom_epp.c139
1 files changed, 84 insertions, 55 deletions
diff --git a/drivers/net/hamradio/baycom_epp.c b/drivers/net/hamradio/baycom_epp.c
index 484f77ec2ce1..5fda7a0fcce0 100644
--- a/drivers/net/hamradio/baycom_epp.c
+++ b/drivers/net/hamradio/baycom_epp.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*****************************************************************************/
/*
@@ -6,25 +7,10 @@
* Copyright (C) 1998-2000
* Thomas Sailer (sailer@ife.ee.ethz.ch)
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * 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.
- *
* Please note that the GPL allows you to use the driver, NOT the radio.
* In order to use the radio, you need a license from the communications
* authority of your country.
*
- *
* History:
* 0.1 xx.xx.1998 Initial version by Matthias Welwarsky (dg2fef)
* 0.2 21.04.1998 Massive rework by Thomas Sailer
@@ -35,7 +21,6 @@
* removed some pre-2.2 kernel compatibility cruft
* 0.6 10.08.1999 Check if parport can do SPP and is safe to access during interrupt contexts
* 0.7 12.02.2000 adapted to softnet driver interface
- *
*/
/*****************************************************************************/
@@ -55,7 +40,7 @@
#include <linux/jiffies.h>
#include <linux/random.h>
#include <net/ax25.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
/* --------------------------------------------------------------------- */
@@ -246,7 +231,7 @@ struct baycom_state {
#if 0
static inline void append_crc_ccitt(unsigned char *buffer, int len)
{
- unsigned int crc = 0xffff;
+ unsigned int crc = 0xffff;
for (;len>0;len--)
crc = (crc >> 8) ^ crc_ccitt_table[(crc ^ *buffer++) & 0xff];
@@ -299,7 +284,7 @@ static inline void baycom_int_freq(struct baycom_state *bc)
* eppconfig_path should be setable via /proc/sys.
*/
-static char eppconfig_path[256] = "/usr/sbin/eppfpga";
+static char const eppconfig_path[] = "/usr/sbin/eppfpga";
static char *envp[] = { "HOME=/", "TERM=linux", "PATH=/usr/bin:/bin", NULL };
@@ -308,8 +293,12 @@ static int eppconfig(struct baycom_state *bc)
{
char modearg[256];
char portarg[16];
- char *argv[] = { eppconfig_path, "-s", "-p", portarg, "-m", modearg,
- NULL };
+ char *argv[] = {
+ (char *)eppconfig_path,
+ "-s",
+ "-p", portarg,
+ "-m", modearg,
+ NULL };
/* set up arguments */
sprintf(modearg, "%sclk,%smodem,fclk=%d,bps=%d,divider=%d%s,extstat",
@@ -401,7 +390,7 @@ static void encode_hdlc(struct baycom_state *bc)
for (j = 0; j < 8; j++)
if (unlikely(!(notbitstream & (0x1f0 << j)))) {
bitstream &= ~(0x100 << j);
- bitbuf = (bitbuf & (((2 << j) << numbit) - 1)) |
+ bitbuf = (bitbuf & (((2 << j) << numbit) - 1)) |
((bitbuf & ~(((2 << j) << numbit) - 1)) << 1);
numbit++;
notbitstream = ~bitstream;
@@ -449,7 +438,7 @@ static int transmit(struct baycom_state *bc, int cnt, unsigned char stat)
if ((--bc->hdlctx.slotcnt) > 0)
return 0;
bc->hdlctx.slotcnt = bc->ch_params.slottime;
- if ((prandom_u32() % 256) > bc->ch_params.ppersist)
+ if (get_random_u8() > bc->ch_params.ppersist)
return 0;
}
}
@@ -511,8 +500,9 @@ static int transmit(struct baycom_state *bc, int cnt, unsigned char stat)
}
break;
}
+ fallthrough;
- default: /* fall through */
+ default:
if (bc->hdlctx.calibrate <= 0)
return 0;
i = min_t(int, cnt, bc->hdlctx.calibrate);
@@ -633,16 +623,10 @@ static int receive(struct net_device *dev, int cnt)
/* --------------------------------------------------------------------- */
-#ifdef __i386__
-#include <asm/msr.h>
-#define GETTICK(x) \
-({ \
- if (cpu_has_tsc) \
- rdtscl(x); \
+#define GETTICK(x) \
+({ \
+ x = (unsigned int)get_cycles(); \
})
-#else /* __i386__ */
-#define GETTICK(x)
-#endif /* __i386__ */
static void epp_bh(struct work_struct *work)
{
@@ -768,17 +752,22 @@ static void epp_bh(struct work_struct *work)
* ===================== network driver interface =========================
*/
-static int baycom_send_packet(struct sk_buff *skb, struct net_device *dev)
+static netdev_tx_t baycom_send_packet(struct sk_buff *skb, struct net_device *dev)
{
struct baycom_state *bc = netdev_priv(dev);
+ if (skb->protocol == htons(ETH_P_IP))
+ return ax25_ip_xmit(skb);
+
if (skb->data[0] != 0) {
do_kiss_params(bc, skb->data, skb->len);
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
- if (bc->skb)
- return NETDEV_TX_LOCKED;
+ if (bc->skb) {
+ dev_kfree_skb(skb);
+ return NETDEV_TX_OK;
+ }
/* strip KISS byte */
if (skb->len >= HDLCDRV_MAXFLEN+1 || skb->len < 3) {
dev_kfree_skb(skb);
@@ -796,7 +785,7 @@ static int baycom_set_mac_address(struct net_device *dev, void *addr)
struct sockaddr *sa = (struct sockaddr *)addr;
/* addr is an AX.25 shifted ASCII mac address */
- memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
+ dev_addr_set(dev, sa->sa_data);
return 0;
}
@@ -831,6 +820,7 @@ static int epp_open(struct net_device *dev)
unsigned char tmp[128];
unsigned char stat;
unsigned long tstart;
+ struct pardev_cb par_cb;
if (!pp) {
printk(KERN_ERR "%s: parport at 0x%lx unknown\n", bc_drvname, dev->base_addr);
@@ -850,8 +840,21 @@ static int epp_open(struct net_device *dev)
return -EIO;
}
memset(&bc->modem, 0, sizeof(bc->modem));
- bc->pdev = parport_register_device(pp, dev->name, NULL, epp_wakeup,
- NULL, PARPORT_DEV_EXCL, dev);
+ memset(&par_cb, 0, sizeof(par_cb));
+ par_cb.wakeup = epp_wakeup;
+ par_cb.private = (void *)dev;
+ par_cb.flags = PARPORT_DEV_EXCL;
+ for (i = 0; i < NR_PORTS; i++)
+ if (baycom_device[i] == dev)
+ break;
+
+ if (i == NR_PORTS) {
+ pr_err("%s: no device found\n", bc_drvname);
+ parport_put_port(pp);
+ return -ENODEV;
+ }
+
+ bc->pdev = parport_register_dev_model(pp, dev->name, &par_cb, i);
parport_put_port(pp);
if (!bc->pdev) {
printk(KERN_ERR "%s: cannot register parport at 0x%lx\n", bc_drvname, pp->base);
@@ -952,8 +955,7 @@ static int epp_close(struct net_device *dev)
parport_write_control(pp, 0); /* reset the adapter */
parport_release(bc->pdev);
parport_unregister_device(bc->pdev);
- if (bc->skb)
- dev_kfree_skb(bc->skb);
+ dev_kfree_skb(bc->skb);
bc->skb = NULL;
printk(KERN_INFO "%s: close epp at iobase 0x%lx irq %u\n",
bc_drvname, dev->base_addr, dev->irq);
@@ -974,10 +976,10 @@ static int baycom_setmode(struct baycom_state *bc, const char *modestr)
bc->cfg.extmodem = 0;
if (strstr(modestr,"extmodem"))
bc->cfg.extmodem = 1;
- if (strstr(modestr,"noloopback"))
- bc->cfg.loopback = 0;
if (strstr(modestr,"loopback"))
bc->cfg.loopback = 1;
+ if (strstr(modestr, "noloopback"))
+ bc->cfg.loopback = 0;
if ((cp = strstr(modestr,"fclk="))) {
bc->cfg.fclk = simple_strtoul(cp+5, NULL, 0);
if (bc->cfg.fclk < 1000000)
@@ -997,7 +999,8 @@ static int baycom_setmode(struct baycom_state *bc, const char *modestr)
/* --------------------------------------------------------------------- */
-static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+static int baycom_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
+ void __user *data, int cmd)
{
struct baycom_state *bc = netdev_priv(dev);
struct hdlcdrv_ioctl hi;
@@ -1005,7 +1008,7 @@ static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
if (cmd != SIOCDEVPRIVATE)
return -ENOIOCTLCMD;
- if (copy_from_user(&hi, ifr->ifr_data, sizeof(hi)))
+ if (copy_from_user(&hi, data, sizeof(hi)))
return -EFAULT;
switch (hi.cmd) {
default:
@@ -1071,7 +1074,7 @@ static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
return 0;
case HDLCDRVCTL_DRIVERNAME:
- strncpy(hi.data.drivername, "baycom_epp", sizeof(hi.data.drivername));
+ strscpy_pad(hi.data.drivername, "baycom_epp");
break;
case HDLCDRVCTL_GETMODE:
@@ -1088,15 +1091,14 @@ static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
return baycom_setmode(bc, hi.data.modename);
case HDLCDRVCTL_MODELIST:
- strncpy(hi.data.modename, "intclk,extclk,intmodem,extmodem,divider=x",
- sizeof(hi.data.modename));
+ strscpy_pad(hi.data.modename, "intclk,extclk,intmodem,extmodem,divider=x");
break;
case HDLCDRVCTL_MODEMPARMASK:
return HDLCDRV_PARMASK_IOBASE;
}
- if (copy_to_user(ifr->ifr_data, &hi, sizeof(hi)))
+ if (copy_to_user(data, &hi, sizeof(hi)))
return -EFAULT;
return 0;
}
@@ -1106,7 +1108,7 @@ static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
static const struct net_device_ops baycom_netdev_ops = {
.ndo_open = epp_open,
.ndo_stop = epp_close,
- .ndo_do_ioctl = baycom_ioctl,
+ .ndo_siocdevprivate = baycom_siocdevprivate,
.ndo_start_xmit = baycom_send_packet,
.ndo_set_mac_address = baycom_set_mac_address,
};
@@ -1150,7 +1152,7 @@ static void baycom_probe(struct net_device *dev)
dev->mtu = AX25_DEF_PACLEN; /* eth_mtu is the default */
dev->addr_len = AX25_ADDR_LEN; /* sizeof an ax.25 address */
memcpy(dev->broadcast, &ax25_bcast, AX25_ADDR_LEN);
- memcpy(dev->dev_addr, &null_ax25_address, AX25_ADDR_LEN);
+ dev_addr_set(dev, (u8 *)&null_ax25_address);
dev->tx_queue_len = 16;
/* New style flags */
@@ -1167,7 +1169,7 @@ static int iobase[NR_PORTS] = { 0x378, };
module_param_array(mode, charp, NULL, 0);
MODULE_PARM_DESC(mode, "baycom operating mode");
-module_param_array(iobase, int, NULL, 0);
+module_param_hw_array(iobase, int, ioport, NULL, 0);
MODULE_PARM_DESC(iobase, "baycom io base address");
MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu");
@@ -1176,6 +1178,22 @@ MODULE_LICENSE("GPL");
/* --------------------------------------------------------------------- */
+static int baycom_epp_par_probe(struct pardevice *par_dev)
+{
+ struct device_driver *drv = par_dev->dev.driver;
+ int len = strlen(drv->name);
+
+ if (strncmp(par_dev->name, drv->name, len))
+ return -ENODEV;
+
+ return 0;
+}
+
+static struct parport_driver baycom_epp_par_driver = {
+ .name = "bce",
+ .probe = baycom_epp_par_probe,
+};
+
static void __init baycom_epp_dev_setup(struct net_device *dev)
{
struct baycom_state *bc = netdev_priv(dev);
@@ -1195,10 +1213,15 @@ static void __init baycom_epp_dev_setup(struct net_device *dev)
static int __init init_baycomepp(void)
{
- int i, found = 0;
+ int i, found = 0, ret;
char set_hw = 1;
printk(bc_drvinfo);
+
+ ret = parport_register_driver(&baycom_epp_par_driver);
+ if (ret)
+ return ret;
+
/*
* register net devices
*/
@@ -1206,7 +1229,7 @@ static int __init init_baycomepp(void)
struct net_device *dev;
dev = alloc_netdev(sizeof(struct baycom_state), "bce%d",
- baycom_epp_dev_setup);
+ NET_NAME_UNKNOWN, baycom_epp_dev_setup);
if (!dev) {
printk(KERN_WARNING "bce%d : out of memory\n", i);
@@ -1232,7 +1255,12 @@ static int __init init_baycomepp(void)
found++;
}
- return found ? 0 : -ENXIO;
+ if (found == 0) {
+ parport_unregister_driver(&baycom_epp_par_driver);
+ return -ENXIO;
+ }
+
+ return 0;
}
static void __exit cleanup_baycomepp(void)
@@ -1251,6 +1279,7 @@ static void __exit cleanup_baycomepp(void)
printk(paranoia_str, "cleanup_module");
}
}
+ parport_unregister_driver(&baycom_epp_par_driver);
}
module_init(init_baycomepp);
generated by cgit (git 2.34.1) at 2025-12-25 11:50:19 +0000