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net: wan: remove support for COSA and SRP synchronous serial boards

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Looks like all the changes to this driver had been automated
churn since git era begun. The driver is using virt_to_bus()
so it should be updated to a proper DMA API or removed. Given
the latest "news" entry on the website is from 1999 I'm opting
for the latter.

I'm marking the allocated char device major number as [REMOVED],
I reckon we can't reuse it in case some SW out there assumes its
COSA?

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2022-04-26 10:54:34 -07:00 committed by David S. Miller
parent 052e1f01bf
commit 89fbca3307
6 changed files with 1 additions and 2186 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

2
Documentation/admin-guide/devices.txt
View file

@ -1933,7 +1933,7 @@
...
255= /dev/umem/d15p15 15th partition of 16th board.
117 char COSA/SRP synchronous serial card
117 char [REMOVED] COSA/SRP synchronous serial card
0 = /dev/cosa0c0 1st board, 1st channel
1 = /dev/cosa0c1 1st board, 2nd channel
...

6
MAINTAINERS
View file

@ -5047,12 +5047,6 @@ S: Maintained
F: Documentation/hwmon/corsair-psu.rst
F: drivers/hwmon/corsair-psu.c
COSA/SRP SYNC SERIAL DRIVER
M: Jan "Yenya" Kasprzak <kas@fi.muni.cz>
S: Maintained
W: http://www.fi.muni.cz/~kas/cosa/
F: drivers/net/wan/cosa*
COUNTER SUBSYSTEM
M: William Breathitt Gray <vilhelm.gray@gmail.com>
L: linux-iio@vger.kernel.org

22
drivers/net/wan/Kconfig
View file

@ -35,28 +35,6 @@ config HOSTESS_SV11
The driver will be compiled as a module: the
module will be called hostess_sv11.
# The COSA/SRP driver has not been tested as non-modular yet.
config COSA
tristate "COSA/SRP sync serial boards support"
depends on ISA && m && ISA_DMA_API && HDLC && VIRT_TO_BUS
help
Driver for COSA and SRP synchronous serial boards.
These boards allow to connect synchronous serial devices (for example
base-band modems, or any other device with the X.21, V.24, V.35 or
V.36 interface) to your Linux box. The cards can work as the
character device, synchronous PPP network device, or the Cisco HDLC
network device.
You will need user-space utilities COSA or SRP boards for downloading
the firmware to the cards and to set them up. Look at the
<http://www.fi.muni.cz/~kas/cosa/> for more information. You can also
read the comment at the top of the <file:drivers/net/wan/cosa.c> for
details about the cards and the driver itself.
The driver will be compiled as a module: the
module will be called cosa.
# There is no way to detect a Sealevel board. Force it modular
config SEALEVEL_4021
tristate "Sealevel Systems 4021 support"

1
drivers/net/wan/Makefile
View file

@ -16,7 +16,6 @@ obj-$(CONFIG_HDLC_X25) += hdlc_x25.o
obj-$(CONFIG_HOSTESS_SV11) += z85230.o hostess_sv11.o
obj-$(CONFIG_SEALEVEL_4021) += z85230.o sealevel.o
obj-$(CONFIG_COSA) += cosa.o
obj-$(CONFIG_FARSYNC) += farsync.o
obj-$(CONFIG_LAPBETHER) += lapbether.o

2052
drivers/net/wan/cosa.c
View file

File diff suppressed because it is too large Load diff

104
drivers/net/wan/cosa.h
View file

@ -1,104 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0-or-later */
/* $Id: cosa.h,v 1.6 1999/01/06 14:02:44 kas Exp $ */
/*
* Copyright (C) 1995-1997 Jan "Yenya" Kasprzak <kas@fi.muni.cz>
*/
#ifndef COSA_H__
#define COSA_H__
#include <linux/ioctl.h>
#ifdef __KERNEL__
/* status register - output bits */
#define SR_RX_DMA_ENA 0x04 /* receiver DMA enable bit */
#define SR_TX_DMA_ENA 0x08 /* transmitter DMA enable bit */
#define SR_RST 0x10 /* SRP reset */
#define SR_USR_INT_ENA 0x20 /* user interrupt enable bit */
#define SR_TX_INT_ENA 0x40 /* transmitter interrupt enable bit */
#define SR_RX_INT_ENA 0x80 /* receiver interrupt enable bit */
/* status register - input bits */
#define SR_USR_RQ 0x20 /* user interrupt request pending */
#define SR_TX_RDY 0x40 /* transmitter empty (ready) */
#define SR_RX_RDY 0x80 /* receiver data ready */
#define SR_UP_REQUEST 0x02 /* request from SRP to transfer data
up to PC */
#define SR_DOWN_REQUEST 0x01 /* SRP is able to transfer data down
from PC to SRP */
#define SR_END_OF_TRANSFER 0x03 /* SRP signalize end of
transfer (up or down) */
#define SR_CMD_FROM_SRP_MASK 0x03 /* mask to get SRP command */
/* bits in driver status byte definitions : */
#define SR_RDY_RCV 0x01 /* ready to receive packet */
#define SR_RDY_SND 0x02 /* ready to send packet */
#define SR_CMD_PND 0x04 /* command pending */ /* not currently used */
/* ???? */
#define SR_PKT_UP 0x01 /* transfer of packet up in progress */
#define SR_PKT_DOWN 0x02 /* transfer of packet down in progress */
#endif /* __KERNEL__ */
#define SR_LOAD_ADDR 0x4400 /* SRP microcode load address */
#define SR_START_ADDR 0x4400 /* SRP microcode start address */
#define COSA_LOAD_ADDR 0x400 /* SRP microcode load address */
#define COSA_MAX_FIRMWARE_SIZE 0x10000
/* ioctls */
struct cosa_download {
int addr, len;
char __user *code;
};
/* Reset the device */
#define COSAIORSET _IO('C',0xf0)
/* Start microcode at given address */
#define COSAIOSTRT _IOW('C',0xf1, int)
/* Read the block from the device memory */
#define COSAIORMEM _IOWR('C',0xf2, struct cosa_download *)
/* actually the struct cosa_download itself; this is to keep
* the ioctl number same as in 2.4 in order to keep the user-space
* utils compatible. */
/* Write the block to the device memory (i.e. download the microcode) */
#define COSAIODOWNLD _IOW('C',0xf2, struct cosa_download *)
/* actually the struct cosa_download itself; this is to keep
* the ioctl number same as in 2.4 in order to keep the user-space
* utils compatible. */
/* Read the device type (one of "srp", "cosa", and "cosa8" for now) */
#define COSAIORTYPE _IOR('C',0xf3, char *)
/* Read the device identification string */
#define COSAIORIDSTR _IOR('C',0xf4, char *)
/* Maximum length of the identification string. */
#define COSA_MAX_ID_STRING 128
/* Increment/decrement the module usage count :-) */
/* #define COSAIOMINC _IO('C',0xf5) */
/* #define COSAIOMDEC _IO('C',0xf6) */
/* Get the total number of cards installed */
#define COSAIONRCARDS _IO('C',0xf7)
/* Get the number of channels on this card */
#define COSAIONRCHANS _IO('C',0xf8)
/* Set the driver for the bus-master operations */
#define COSAIOBMSET _IOW('C', 0xf9, unsigned short)
#define COSA_BM_OFF 0 /* Bus-mastering off - use ISA DMA (default) */
#define COSA_BM_ON 1 /* Bus-mastering on - faster but untested */
/* Gets the busmaster status */
#define COSAIOBMGET _IO('C', 0xfa)
#endif /* !COSA_H__ */