net: wan: remove support for Z85230-based devices

Looks like all the changes to this driver had been automated
churn since git era begun. The driver is using virt_to_bus(),
it's just a maintenance burden unlikely to have any users.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

6 files changed, 0 insertions, 2760 deletions

diff --git a/drivers/net/wan/Kconfig b/drivers/net/wan/Kconfig
index 12c5b6c67ab2..dcb069dde66b 100644
--- a/drivers/net/wan/Kconfig
+++ b/drivers/net/wan/Kconfig
@@ -23,28 +23,6 @@ menuconfig WAN
 
 if WAN
 
-# There is no way to detect a comtrol sv11 - force it modular for now.
-config HOSTESS_SV11
-	tristate "Comtrol Hostess SV-11 support"
-	depends on ISA && m && ISA_DMA_API && INET && HDLC && VIRT_TO_BUS
-	help
-	  Driver for Comtrol Hostess SV-11 network card which
-	  operates on low speed synchronous serial links at up to
-	  256Kbps, supporting PPP and Cisco HDLC.
-
-	  The driver will be compiled as a module: the
-	  module will be called hostess_sv11.
-
-# There is no way to detect a Sealevel board. Force it modular
-config SEALEVEL_4021
-	tristate "Sealevel Systems 4021 support"
-	depends on ISA && m && ISA_DMA_API && INET && HDLC && VIRT_TO_BUS
-	help
-	  This is a driver for the Sealevel Systems ACB 56 serial I/O adapter.
-
-	  The driver will be compiled as a module: the
-	  module will be called sealevel.
-
 # Generic HDLC
 config HDLC
 	tristate "Generic HDLC layer"
diff --git a/drivers/net/wan/Makefile b/drivers/net/wan/Makefile
index 901a094c061c..5bec8fae47f8 100644
--- a/drivers/net/wan/Makefile
+++ b/drivers/net/wan/Makefile
@@ -14,8 +14,6 @@ obj-$(CONFIG_HDLC_FR)		+= hdlc_fr.o
 obj-$(CONFIG_HDLC_PPP)		+= hdlc_ppp.o
 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_FARSYNC)		+= farsync.o
 
 obj-$(CONFIG_LAPBETHER)		+= lapbether.o
diff --git a/drivers/net/wan/hostess_sv11.c b/drivers/net/wan/hostess_sv11.c
deleted file mode 100644
index e985e54ba75d..000000000000
--- a/drivers/net/wan/hostess_sv11.c
+++ /dev/null
@@ -1,336 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*	Comtrol SV11 card driver
- *
- *	This is a slightly odd Z85230 synchronous driver. All you need to
- *	know basically is
- *
- *	Its a genuine Z85230
- *
- *	It supports DMA using two DMA channels in SYNC mode. The driver doesn't
- *	use these facilities
- *
- *	The control port is at io+1, the data at io+3 and turning off the DMA
- *	is done by writing 0 to io+4
- *
- *	The hardware does the bus handling to avoid the need for delays between
- *	touching control registers.
- *
- *	Port B isn't wired (why - beats me)
- *
- *	Generic HDLC port Copyright (C) 2008 Krzysztof Halasa <khc@pm.waw.pl>
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/net.h>
-#include <linux/skbuff.h>
-#include <linux/netdevice.h>
-#include <linux/if_arp.h>
-#include <linux/delay.h>
-#include <linux/hdlc.h>
-#include <linux/ioport.h>
-#include <linux/slab.h>
-#include <net/arp.h>
-
-#include <asm/irq.h>
-#include <asm/io.h>
-#include <asm/dma.h>
-#include <asm/byteorder.h>
-#include "z85230.h"
-
-static int dma;
-
-/*	Network driver support routines
- */
-
-static inline struct z8530_dev *dev_to_sv(struct net_device *dev)
-{
-	return (struct z8530_dev *)dev_to_hdlc(dev)->priv;
-}
-
-/*	Frame receive. Simple for our card as we do HDLC and there
- *	is no funny garbage involved
- */
-
-static void hostess_input(struct z8530_channel *c, struct sk_buff *skb)
-{
-	/* Drop the CRC - it's not a good idea to try and negotiate it ;) */
-	skb_trim(skb, skb->len - 2);
-	skb->protocol = hdlc_type_trans(skb, c->netdevice);
-	skb_reset_mac_header(skb);
-	skb->dev = c->netdevice;
-	/*	Send it to the PPP layer. We don't have time to process
-	 *	it right now.
-	 */
-	netif_rx(skb);
-}
-
-/*	We've been placed in the UP state
- */
-
-static int hostess_open(struct net_device *d)
-{
-	struct z8530_dev *sv11 = dev_to_sv(d);
-	int err = -1;
-
-	/*	Link layer up
-	 */
-	switch (dma) {
-	case 0:
-		err = z8530_sync_open(d, &sv11->chanA);
-		break;
-	case 1:
-		err = z8530_sync_dma_open(d, &sv11->chanA);
-		break;
-	case 2:
-		err = z8530_sync_txdma_open(d, &sv11->chanA);
-		break;
-	}
-
-	if (err)
-		return err;
-
-	err = hdlc_open(d);
-	if (err) {
-		switch (dma) {
-		case 0:
-			z8530_sync_close(d, &sv11->chanA);
-			break;
-		case 1:
-			z8530_sync_dma_close(d, &sv11->chanA);
-			break;
-		case 2:
-			z8530_sync_txdma_close(d, &sv11->chanA);
-			break;
-		}
-		return err;
-	}
-	sv11->chanA.rx_function = hostess_input;
-
-	/*
-	 *	Go go go
-	 */
-
-	netif_start_queue(d);
-	return 0;
-}
-
-static int hostess_close(struct net_device *d)
-{
-	struct z8530_dev *sv11 = dev_to_sv(d);
-	/*	Discard new frames
-	 */
-	sv11->chanA.rx_function = z8530_null_rx;
-
-	hdlc_close(d);
-	netif_stop_queue(d);
-
-	switch (dma) {
-	case 0:
-		z8530_sync_close(d, &sv11->chanA);
-		break;
-	case 1:
-		z8530_sync_dma_close(d, &sv11->chanA);
-		break;
-	case 2:
-		z8530_sync_txdma_close(d, &sv11->chanA);
-		break;
-	}
-	return 0;
-}
-
-/*	Passed network frames, fire them downwind.
- */
-
-static netdev_tx_t hostess_queue_xmit(struct sk_buff *skb,
-				      struct net_device *d)
-{
-	return z8530_queue_xmit(&dev_to_sv(d)->chanA, skb);
-}
-
-static int hostess_attach(struct net_device *dev, unsigned short encoding,
-			  unsigned short parity)
-{
-	if (encoding == ENCODING_NRZ && parity == PARITY_CRC16_PR1_CCITT)
-		return 0;
-	return -EINVAL;
-}
-
-/*	Description block for a Comtrol Hostess SV11 card
- */
-
-static const struct net_device_ops hostess_ops = {
-	.ndo_open       = hostess_open,
-	.ndo_stop       = hostess_close,
-	.ndo_start_xmit = hdlc_start_xmit,
-	.ndo_siocwandev = hdlc_ioctl,
-};
-
-static struct z8530_dev *sv11_init(int iobase, int irq)
-{
-	struct z8530_dev *sv;
-	struct net_device *netdev;
-	/*	Get the needed I/O space
-	 */
-
-	if (!request_region(iobase, 8, "Comtrol SV11")) {
-		pr_warn("I/O 0x%X already in use\n", iobase);
-		return NULL;
-	}
-
-	sv = kzalloc(sizeof(struct z8530_dev), GFP_KERNEL);
-	if (!sv)
-		goto err_kzalloc;
-
-	/*	Stuff in the I/O addressing
-	 */
-
-	sv->active = 0;
-
-	sv->chanA.ctrlio = iobase + 1;
-	sv->chanA.dataio = iobase + 3;
-	sv->chanB.ctrlio = -1;
-	sv->chanB.dataio = -1;
-	sv->chanA.irqs = &z8530_nop;
-	sv->chanB.irqs = &z8530_nop;
-
-	outb(0, iobase + 4);		/* DMA off */
-
-	/* We want a fast IRQ for this device. Actually we'd like an even faster
-	 * IRQ ;) - This is one driver RtLinux is made for
-	 */
-
-	if (request_irq(irq, z8530_interrupt, 0,
-			"Hostess SV11", sv) < 0) {
-		pr_warn("IRQ %d already in use\n", irq);
-		goto err_irq;
-	}
-
-	sv->irq = irq;
-	sv->chanA.private = sv;
-	sv->chanA.dev = sv;
-	sv->chanB.dev = sv;
-
-	if (dma) {
-		/*	You can have DMA off or 1 and 3 thats the lot
-		 *	on the Comtrol.
-		 */
-		sv->chanA.txdma = 3;
-		sv->chanA.rxdma = 1;
-		outb(0x03 | 0x08, iobase + 4);		/* DMA on */
-		if (request_dma(sv->chanA.txdma, "Hostess SV/11 (TX)"))
-			goto err_txdma;
-
-		if (dma == 1)
-			if (request_dma(sv->chanA.rxdma, "Hostess SV/11 (RX)"))
-				goto err_rxdma;
-	}
-
-	/* Kill our private IRQ line the hostess can end up chattering
-	 * until the configuration is set
-	 */
-	disable_irq(irq);
-
-	/*	Begin normal initialise
-	 */
-
-	if (z8530_init(sv)) {
-		pr_err("Z8530 series device not found\n");
-		enable_irq(irq);
-		goto free_dma;
-	}
-	z8530_channel_load(&sv->chanB, z8530_dead_port);
-	if (sv->type == Z85C30)
-		z8530_channel_load(&sv->chanA, z8530_hdlc_kilostream);
-	else
-		z8530_channel_load(&sv->chanA, z8530_hdlc_kilostream_85230);
-
-	enable_irq(irq);
-
-	/*	Now we can take the IRQ
-	 */
-
-	sv->chanA.netdevice = netdev = alloc_hdlcdev(sv);
-	if (!netdev)
-		goto free_dma;
-
-	dev_to_hdlc(netdev)->attach = hostess_attach;
-	dev_to_hdlc(netdev)->xmit = hostess_queue_xmit;
-	netdev->netdev_ops = &hostess_ops;
-	netdev->base_addr = iobase;
-	netdev->irq = irq;
-
-	if (register_hdlc_device(netdev)) {
-		pr_err("unable to register HDLC device\n");
-		free_netdev(netdev);
-		goto free_dma;
-	}
-
-	z8530_describe(sv, "I/O", iobase);
-	sv->active = 1;
-	return sv;
-
-free_dma:
-	if (dma == 1)
-		free_dma(sv->chanA.rxdma);
-err_rxdma:
-	if (dma)
-		free_dma(sv->chanA.txdma);
-err_txdma:
-	free_irq(irq, sv);
-err_irq:
-	kfree(sv);
-err_kzalloc:
-	release_region(iobase, 8);
-	return NULL;
-}
-
-static void sv11_shutdown(struct z8530_dev *dev)
-{
-	unregister_hdlc_device(dev->chanA.netdevice);
-	z8530_shutdown(dev);
-	free_irq(dev->irq, dev);
-	if (dma) {
-		if (dma == 1)
-			free_dma(dev->chanA.rxdma);
-		free_dma(dev->chanA.txdma);
-	}
-	release_region(dev->chanA.ctrlio - 1, 8);
-	free_netdev(dev->chanA.netdevice);
-	kfree(dev);
-}
-
-static int io = 0x200;
-static int irq = 9;
-
-module_param_hw(io, int, ioport, 0);
-MODULE_PARM_DESC(io, "The I/O base of the Comtrol Hostess SV11 card");
-module_param_hw(dma, int, dma, 0);
-MODULE_PARM_DESC(dma, "Set this to 1 to use DMA1/DMA3 for TX/RX");
-module_param_hw(irq, int, irq, 0);
-MODULE_PARM_DESC(irq, "The interrupt line setting for the Comtrol Hostess SV11 card");
-
-MODULE_AUTHOR("Alan Cox");
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("Modular driver for the Comtrol Hostess SV11");
-
-static struct z8530_dev *sv11_unit;
-
-static int sv11_module_init(void)
-{
-	sv11_unit = sv11_init(io, irq);
-	if (!sv11_unit)
-		return -ENODEV;
-	return 0;
-}
-module_init(sv11_module_init);
-
-static void sv11_module_cleanup(void)
-{
-	if (sv11_unit)
-		sv11_shutdown(sv11_unit);
-}
-module_exit(sv11_module_cleanup);
diff --git a/drivers/net/wan/sealevel.c b/drivers/net/wan/sealevel.c
deleted file mode 100644
index eddd20aab691..000000000000
--- a/drivers/net/wan/sealevel.c
+++ /dev/null
@@ -1,352 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*	Sealevel Systems 4021 driver.
- *
- *	(c) Copyright 1999, 2001 Alan Cox
- *	(c) Copyright 2001 Red Hat Inc.
- *	Generic HDLC port Copyright (C) 2008 Krzysztof Halasa <khc@pm.waw.pl>
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/net.h>
-#include <linux/skbuff.h>
-#include <linux/netdevice.h>
-#include <linux/if_arp.h>
-#include <linux/delay.h>
-#include <linux/hdlc.h>
-#include <linux/ioport.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <net/arp.h>
-
-#include <asm/irq.h>
-#include <asm/io.h>
-#include <asm/dma.h>
-#include <asm/byteorder.h>
-#include "z85230.h"
-
-struct slvl_device {
-	struct z8530_channel *chan;
-	int channel;
-};
-
-struct slvl_board {
-	struct slvl_device dev[2];
-	struct z8530_dev board;
-	int iobase;
-};
-
- /*	Network driver support routines */
-
-static inline struct slvl_device *dev_to_chan(struct net_device *dev)
-{
-	return (struct slvl_device *)dev_to_hdlc(dev)->priv;
-}
-
-/*	Frame receive. Simple for our card as we do HDLC and there
- *	is no funny garbage involved
- */
-
-static void sealevel_input(struct z8530_channel *c, struct sk_buff *skb)
-{
-	/* Drop the CRC - it's not a good idea to try and negotiate it ;) */
-	skb_trim(skb, skb->len - 2);
-	skb->protocol = hdlc_type_trans(skb, c->netdevice);
-	skb_reset_mac_header(skb);
-	skb->dev = c->netdevice;
-	netif_rx(skb);
-}
-
- /*	We've been placed in the UP state */
-
-static int sealevel_open(struct net_device *d)
-{
-	struct slvl_device *slvl = dev_to_chan(d);
-	int err = -1;
-	int unit = slvl->channel;
-
-	 /*	Link layer up. */
-
-	switch (unit) {
-	case 0:
-		err = z8530_sync_dma_open(d, slvl->chan);
-		break;
-	case 1:
-		err = z8530_sync_open(d, slvl->chan);
-		break;
-	}
-
-	if (err)
-		return err;
-
-	err = hdlc_open(d);
-	if (err) {
-		switch (unit) {
-		case 0:
-			z8530_sync_dma_close(d, slvl->chan);
-			break;
-		case 1:
-			z8530_sync_close(d, slvl->chan);
-			break;
-		}
-		return err;
-	}
-
-	slvl->chan->rx_function = sealevel_input;
-
-	netif_start_queue(d);
-	return 0;
-}
-
-static int sealevel_close(struct net_device *d)
-{
-	struct slvl_device *slvl = dev_to_chan(d);
-	int unit = slvl->channel;
-
-	/*	Discard new frames */
-
-	slvl->chan->rx_function = z8530_null_rx;
-
-	hdlc_close(d);
-	netif_stop_queue(d);
-
-	switch (unit) {
-	case 0:
-		z8530_sync_dma_close(d, slvl->chan);
-		break;
-	case 1:
-		z8530_sync_close(d, slvl->chan);
-		break;
-	}
-	return 0;
-}
-
-/*	Passed network frames, fire them downwind. */
-
-static netdev_tx_t sealevel_queue_xmit(struct sk_buff *skb,
-				       struct net_device *d)
-{
-	return z8530_queue_xmit(dev_to_chan(d)->chan, skb);
-}
-
-static int sealevel_attach(struct net_device *dev, unsigned short encoding,
-			   unsigned short parity)
-{
-	if (encoding == ENCODING_NRZ && parity == PARITY_CRC16_PR1_CCITT)
-		return 0;
-	return -EINVAL;
-}
-
-static const struct net_device_ops sealevel_ops = {
-	.ndo_open       = sealevel_open,
-	.ndo_stop       = sealevel_close,
-	.ndo_start_xmit = hdlc_start_xmit,
-	.ndo_siocwandev = hdlc_ioctl,
-};
-
-static int slvl_setup(struct slvl_device *sv, int iobase, int irq)
-{
-	struct net_device *dev = alloc_hdlcdev(sv);
-
-	if (!dev)
-		return -1;
-
-	dev_to_hdlc(dev)->attach = sealevel_attach;
-	dev_to_hdlc(dev)->xmit = sealevel_queue_xmit;
-	dev->netdev_ops = &sealevel_ops;
-	dev->base_addr = iobase;
-	dev->irq = irq;
-
-	if (register_hdlc_device(dev)) {
-		pr_err("unable to register HDLC device\n");
-		free_netdev(dev);
-		return -1;
-	}
-
-	sv->chan->netdevice = dev;
-	return 0;
-}
-
-/*	Allocate and setup Sealevel board. */
-
-static __init struct slvl_board *slvl_init(int iobase, int irq,
-					   int txdma, int rxdma, int slow)
-{
-	struct z8530_dev *dev;
-	struct slvl_board *b;
-
-	/*	Get the needed I/O space */
-
-	if (!request_region(iobase, 8, "Sealevel 4021")) {
-		pr_warn("I/O 0x%X already in use\n", iobase);
-		return NULL;
-	}
-
-	b = kzalloc(sizeof(struct slvl_board), GFP_KERNEL);
-	if (!b)
-		goto err_kzalloc;
-
-	b->dev[0].chan = &b->board.chanA;
-	b->dev[0].channel = 0;
-
-	b->dev[1].chan = &b->board.chanB;
-	b->dev[1].channel = 1;
-
-	dev = &b->board;
-
-	/*	Stuff in the I/O addressing */
-
-	dev->active = 0;
-
-	b->iobase = iobase;
-
-	/*	Select 8530 delays for the old board */
-
-	if (slow)
-		iobase |= Z8530_PORT_SLEEP;
-
-	dev->chanA.ctrlio = iobase + 1;
-	dev->chanA.dataio = iobase;
-	dev->chanB.ctrlio = iobase + 3;
-	dev->chanB.dataio = iobase + 2;
-
-	dev->chanA.irqs = &z8530_nop;
-	dev->chanB.irqs = &z8530_nop;
-
-	/*	Assert DTR enable DMA */
-
-	outb(3 | (1 << 7), b->iobase + 4);
-
-	/* We want a fast IRQ for this device. Actually we'd like an even faster
-	 * IRQ ;) - This is one driver RtLinux is made for
-	 */
-
-	if (request_irq(irq, z8530_interrupt, 0,
-			"SeaLevel", dev) < 0) {
-		pr_warn("IRQ %d already in use\n", irq);
-		goto err_request_irq;
-	}
-
-	dev->irq = irq;
-	dev->chanA.private = &b->dev[0];
-	dev->chanB.private = &b->dev[1];
-	dev->chanA.dev = dev;
-	dev->chanB.dev = dev;
-
-	dev->chanA.txdma = 3;
-	dev->chanA.rxdma = 1;
-	if (request_dma(dev->chanA.txdma, "SeaLevel (TX)"))
-		goto err_dma_tx;
-
-	if (request_dma(dev->chanA.rxdma, "SeaLevel (RX)"))
-		goto err_dma_rx;
-
-	disable_irq(irq);
-
-	/*	Begin normal initialise */
-
-	if (z8530_init(dev) != 0) {
-		pr_err("Z8530 series device not found\n");
-		enable_irq(irq);
-		goto free_hw;
-	}
-	if (dev->type == Z85C30) {
-		z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream);
-		z8530_channel_load(&dev->chanB, z8530_hdlc_kilostream);
-	} else {
-		z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream_85230);
-		z8530_channel_load(&dev->chanB, z8530_hdlc_kilostream_85230);
-	}
-
-	/*	Now we can take the IRQ */
-
-	enable_irq(irq);
-
-	if (slvl_setup(&b->dev[0], iobase, irq))
-		goto free_hw;
-	if (slvl_setup(&b->dev[1], iobase, irq))
-		goto free_netdev0;
-
-	z8530_describe(dev, "I/O", iobase);
-	dev->active = 1;
-	return b;
-
-free_netdev0:
-	unregister_hdlc_device(b->dev[0].chan->netdevice);
-	free_netdev(b->dev[0].chan->netdevice);
-free_hw:
-	free_dma(dev->chanA.rxdma);
-err_dma_rx:
-	free_dma(dev->chanA.txdma);
-err_dma_tx:
-	free_irq(irq, dev);
-err_request_irq:
-	kfree(b);
-err_kzalloc:
-	release_region(iobase, 8);
-	return NULL;
-}
-
-static void __exit slvl_shutdown(struct slvl_board *b)
-{
-	int u;
-
-	z8530_shutdown(&b->board);
-
-	for (u = 0; u < 2; u++) {
-		struct net_device *d = b->dev[u].chan->netdevice;
-
-		unregister_hdlc_device(d);
-		free_netdev(d);
-	}
-
-	free_irq(b->board.irq, &b->board);
-	free_dma(b->board.chanA.rxdma);
-	free_dma(b->board.chanA.txdma);
-	/* DMA off on the card, drop DTR */
-	outb(0, b->iobase);
-	release_region(b->iobase, 8);
-	kfree(b);
-}
-
-static int io = 0x238;
-static int txdma = 1;
-static int rxdma = 3;
-static int irq = 5;
-static bool slow;
-
-module_param_hw(io, int, ioport, 0);
-MODULE_PARM_DESC(io, "The I/O base of the Sealevel card");
-module_param_hw(txdma, int, dma, 0);
-MODULE_PARM_DESC(txdma, "Transmit DMA channel");
-module_param_hw(rxdma, int, dma, 0);
-MODULE_PARM_DESC(rxdma, "Receive DMA channel");
-module_param_hw(irq, int, irq, 0);
-MODULE_PARM_DESC(irq, "The interrupt line setting for the SeaLevel card");
-module_param(slow, bool, 0);
-MODULE_PARM_DESC(slow, "Set this for an older Sealevel card such as the 4012");
-
-MODULE_AUTHOR("Alan Cox");
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("Modular driver for the SeaLevel 4021");
-
-static struct slvl_board *slvl_unit;
-
-static int __init slvl_init_module(void)
-{
-	slvl_unit = slvl_init(io, irq, txdma, rxdma, slow);
-
-	return slvl_unit ? 0 : -ENODEV;
-}
-
-static void __exit slvl_cleanup_module(void)
-{
-	if (slvl_unit)
-		slvl_shutdown(slvl_unit);
-}
-
-module_init(slvl_init_module);
-module_exit(slvl_cleanup_module);
diff --git a/drivers/net/wan/z85230.c b/drivers/net/wan/z85230.c
deleted file mode 100644
index 982a03488a00..000000000000
--- a/drivers/net/wan/z85230.c
+++ /dev/null
@@ -1,1641 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*	(c) Copyright 1998 Alan Cox <alan@lxorguk.ukuu.org.uk>
- *	(c) Copyright 2000, 2001 Red Hat Inc
- *
- *	Development of this driver was funded by Equiinet Ltd
- *			http://www.equiinet.com
- *
- *	ChangeLog:
- *
- *	Asynchronous mode dropped for 2.2. For 2.5 we will attempt the
- *	unification of all the Z85x30 asynchronous drivers for real.
- *
- *	DMA now uses get_free_page as kmalloc buffers may span a 64K
- *	boundary.
- *
- *	Modified for SMP safety and SMP locking by Alan Cox
- *					<alan@lxorguk.ukuu.org.uk>
- *
- *	Performance
- *
- *	Z85230:
- *	Non DMA you want a 486DX50 or better to do 64Kbits. 9600 baud
- *	X.25 is not unrealistic on all machines. DMA mode can in theory
- *	handle T1/E1 quite nicely. In practice the limit seems to be about
- *	512Kbit->1Mbit depending on motherboard.
- *
- *	Z85C30:
- *	64K will take DMA, 9600 baud X.25 should be ok.
- *
- *	Z8530:
- *	Synchronous mode without DMA is unlikely to pass about 2400 baud.
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/net.h>
-#include <linux/skbuff.h>
-#include <linux/netdevice.h>
-#include <linux/if_arp.h>
-#include <linux/delay.h>
-#include <linux/hdlc.h>
-#include <linux/ioport.h>
-#include <linux/init.h>
-#include <linux/gfp.h>
-#include <asm/dma.h>
-#include <asm/io.h>
-#define RT_LOCK
-#define RT_UNLOCK
-#include <linux/spinlock.h>
-
-#include "z85230.h"
-
-/**
- *	z8530_read_port - Architecture specific interface function
- *	@p: port to read
- *
- *	Provided port access methods. The Comtrol SV11 requires no delays
- *	between accesses and uses PC I/O. Some drivers may need a 5uS delay
- *
- *	In the longer term this should become an architecture specific
- *	section so that this can become a generic driver interface for all
- *	platforms. For now we only handle PC I/O ports with or without the
- *	dread 5uS sanity delay.
- *
- *	The caller must hold sufficient locks to avoid violating the horrible
- *	5uS delay rule.
- */
-
-static inline int z8530_read_port(unsigned long p)
-{
-	u8 r = inb(Z8530_PORT_OF(p));
-
-	if (p & Z8530_PORT_SLEEP) /* gcc should figure this out efficiently ! */
-		udelay(5);
-	return r;
-}
-
-/**
- *	z8530_write_port - Architecture specific interface function
- *	@p: port to write
- *	@d: value to write
- *
- *	Write a value to a port with delays if need be. Note that the
- *	caller must hold locks to avoid read/writes from other contexts
- *	violating the 5uS rule
- *
- *	In the longer term this should become an architecture specific
- *	section so that this can become a generic driver interface for all
- *	platforms. For now we only handle PC I/O ports with or without the
- *	dread 5uS sanity delay.
- */
-
-static inline void z8530_write_port(unsigned long p, u8 d)
-{
-	outb(d, Z8530_PORT_OF(p));
-	if (p & Z8530_PORT_SLEEP)
-		udelay(5);
-}
-
-static void z8530_rx_done(struct z8530_channel *c);
-static void z8530_tx_done(struct z8530_channel *c);
-
-/**
- *	read_zsreg - Read a register from a Z85230
- *	@c: Z8530 channel to read from (2 per chip)
- *	@reg: Register to read
- *	FIXME: Use a spinlock.
- *
- *	Most of the Z8530 registers are indexed off the control registers.
- *	A read is done by writing to the control register and reading the
- *	register back.  The caller must hold the lock
- */
-
-static inline u8 read_zsreg(struct z8530_channel *c, u8 reg)
-{
-	if (reg)
-		z8530_write_port(c->ctrlio, reg);
-	return z8530_read_port(c->ctrlio);
-}
-
-/**
- *	read_zsdata - Read the data port of a Z8530 channel
- *	@c: The Z8530 channel to read the data port from
- *
- *	The data port provides fast access to some things. We still
- *	have all the 5uS delays to worry about.
- */
-
-static inline u8 read_zsdata(struct z8530_channel *c)
-{
-	u8 r;
-
-	r = z8530_read_port(c->dataio);
-	return r;
-}
-
-/**
- *	write_zsreg - Write to a Z8530 channel register
- *	@c: The Z8530 channel
- *	@reg: Register number
- *	@val: Value to write
- *
- *	Write a value to an indexed register. The caller must hold the lock
- *	to honour the irritating delay rules. We know about register 0
- *	being fast to access.
- *
- *      Assumes c->lock is held.
- */
-static inline void write_zsreg(struct z8530_channel *c, u8 reg, u8 val)
-{
-	if (reg)
-		z8530_write_port(c->ctrlio, reg);
-	z8530_write_port(c->ctrlio, val);
-}
-
-/**
- *	write_zsctrl - Write to a Z8530 control register
- *	@c: The Z8530 channel
- *	@val: Value to write
- *
- *	Write directly to the control register on the Z8530
- */
-
-static inline void write_zsctrl(struct z8530_channel *c, u8 val)
-{
-	z8530_write_port(c->ctrlio, val);
-}
-
-/**
- *	write_zsdata - Write to a Z8530 control register
- *	@c: The Z8530 channel
- *	@val: Value to write
- *
- *	Write directly to the data register on the Z8530
- */
-static inline void write_zsdata(struct z8530_channel *c, u8 val)
-{
-	z8530_write_port(c->dataio, val);
-}
-
-/*	Register loading parameters for a dead port
- */
-
-u8 z8530_dead_port[] = {
-	255
-};
-EXPORT_SYMBOL(z8530_dead_port);
-
-/*	Register loading parameters for currently supported circuit types
- */
-
-/*	Data clocked by telco end. This is the correct data for the UK
- *	"kilostream" service, and most other similar services.
- */
-
-u8 z8530_hdlc_kilostream[] = {
-	4,	SYNC_ENAB | SDLC | X1CLK,
-	2,	0,	/* No vector */
-	1,	0,
-	3,	ENT_HM | RxCRC_ENAB | Rx8,
-	5,	TxCRC_ENAB | RTS | TxENAB | Tx8 | DTR,
-	9,	0,		/* Disable interrupts */
-	6,	0xFF,
-	7,	FLAG,
-	10,	ABUNDER | NRZ | CRCPS,/*MARKIDLE ??*/
-	11,	TCTRxCP,
-	14,	DISDPLL,
-	15,	DCDIE | SYNCIE | CTSIE | TxUIE | BRKIE,
-	1,	EXT_INT_ENAB | TxINT_ENAB | INT_ALL_Rx,
-	9,	NV | MIE | NORESET,
-	255
-};
-EXPORT_SYMBOL(z8530_hdlc_kilostream);
-
-/*	As above but for enhanced chips.
- */
-
-u8 z8530_hdlc_kilostream_85230[] = {
-	4,	SYNC_ENAB | SDLC | X1CLK,
-	2,	0,	/* No vector */
-	1,	0,
-	3,	ENT_HM | RxCRC_ENAB | Rx8,
-	5,	TxCRC_ENAB | RTS | TxENAB | Tx8 | DTR,
-	9,	0,		/* Disable interrupts */
-	6,	0xFF,
-	7,	FLAG,
-	10,	ABUNDER | NRZ | CRCPS,	/* MARKIDLE?? */
-	11,	TCTRxCP,
-	14,	DISDPLL,
-	15,	DCDIE | SYNCIE | CTSIE | TxUIE | BRKIE,
-	1,	EXT_INT_ENAB | TxINT_ENAB | INT_ALL_Rx,
-	9,	NV | MIE | NORESET,
-	23,	3,		/* Extended mode AUTO TX and EOM*/
-
-	255
-};
-EXPORT_SYMBOL(z8530_hdlc_kilostream_85230);
-
-/**
- *	z8530_flush_fifo - Flush on chip RX FIFO
- *	@c: Channel to flush
- *
- *	Flush the receive FIFO. There is no specific option for this, we
- *	blindly read bytes and discard them. Reading when there is no data
- *	is harmless. The 8530 has a 4 byte FIFO, the 85230 has 8 bytes.
- *
- *	All locking is handled for the caller. On return data may still be
- *	present if it arrived during the flush.
- */
-
-static void z8530_flush_fifo(struct z8530_channel *c)
-{
-	read_zsreg(c, R1);
-	read_zsreg(c, R1);
-	read_zsreg(c, R1);
-	read_zsreg(c, R1);
-	if (c->dev->type == Z85230) {
-		read_zsreg(c, R1);
-		read_zsreg(c, R1);
-		read_zsreg(c, R1);
-		read_zsreg(c, R1);
-	}
-}
-
-/**
- *	z8530_rtsdtr - Control the outgoing DTS/RTS line
- *	@c: The Z8530 channel to control;
- *	@set: 1 to set, 0 to clear
- *
- *	Sets or clears DTR/RTS on the requested line. All locking is handled
- *	by the caller. For now we assume all boards use the actual RTS/DTR
- *	on the chip. Apparently one or two don't. We'll scream about them
- *	later.
- */
-
-static void z8530_rtsdtr(struct z8530_channel *c, int set)
-{
-	if (set)
-		c->regs[5] |= (RTS | DTR);
-	else
-		c->regs[5] &= ~(RTS | DTR);
-	write_zsreg(c, R5, c->regs[5]);
-}
-
-/**
- *	z8530_rx - Handle a PIO receive event
- *	@c: Z8530 channel to process
- *
- *	Receive handler for receiving in PIO mode. This is much like the
- *	async one but not quite the same or as complex
- *
- *	Note: Its intended that this handler can easily be separated from
- *	the main code to run realtime. That'll be needed for some machines
- *	(eg to ever clock 64kbits on a sparc ;)).
- *
- *	The RT_LOCK macros don't do anything now. Keep the code covered
- *	by them as short as possible in all circumstances - clocks cost
- *	baud. The interrupt handler is assumed to be atomic w.r.t. to
- *	other code - this is true in the RT case too.
- *
- *	We only cover the sync cases for this. If you want 2Mbit async
- *	do it yourself but consider medical assistance first. This non DMA
- *	synchronous mode is portable code. The DMA mode assumes PCI like
- *	ISA DMA
- *
- *	Called with the device lock held
- */
-
-static void z8530_rx(struct z8530_channel *c)
-{
-	u8 ch, stat;
-
-	while (1) {
-		/* FIFO empty ? */
-		if (!(read_zsreg(c, R0) & 1))
-			break;
-		ch = read_zsdata(c);
-		stat = read_zsreg(c, R1);
-
-		/*	Overrun ?
-		 */
-		if (c->count < c->max) {
-			*c->dptr++ = ch;
-			c->count++;
-		}
-
-		if (stat & END_FR) {
-			/*	Error ?
-			 */
-			if (stat & (Rx_OVR | CRC_ERR)) {
-				/* Rewind the buffer and return */
-				if (c->skb)
-					c->dptr = c->skb->data;
-				c->count = 0;
-				if (stat & Rx_OVR) {
-					pr_warn("%s: overrun\n", c->dev->name);
-					c->rx_overrun++;
-				}
-				if (stat & CRC_ERR) {
-					c->rx_crc_err++;
-					/* printk("crc error\n"); */
-				}
-				/* Shove the frame upstream */
-			} else {
-				/*	Drop the lock for RX processing, or
-				 *	there are deadlocks
-				 */
-				z8530_rx_done(c);
-				write_zsctrl(c, RES_Rx_CRC);
-			}
-		}
-	}
-	/*	Clear irq
-	 */
-	write_zsctrl(c, ERR_RES);
-	write_zsctrl(c, RES_H_IUS);
-}
-
-/**
- *	z8530_tx - Handle a PIO transmit event
- *	@c: Z8530 channel to process
- *
- *	Z8530 transmit interrupt handler for the PIO mode. The basic
- *	idea is to attempt to keep the FIFO fed. We fill as many bytes
- *	in as possible, its quite possible that we won't keep up with the
- *	data rate otherwise.
- */
-
-static void z8530_tx(struct z8530_channel *c)
-{
-	while (c->txcount) {
-		/* FIFO full ? */
-		if (!(read_zsreg(c, R0) & 4))
-			return;
-		c->txcount--;
-		/*	Shovel out the byte
-		 */
-		write_zsreg(c, R8, *c->tx_ptr++);
-		write_zsctrl(c, RES_H_IUS);
-