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path: root/drivers/char/pcmcia/ipwireless/network.c
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Diffstat (limited to 'drivers/char/pcmcia/ipwireless/network.c')
-rw-r--r--drivers/char/pcmcia/ipwireless/network.c508
1 files changed, 0 insertions, 508 deletions
diff --git a/drivers/char/pcmcia/ipwireless/network.c b/drivers/char/pcmcia/ipwireless/network.c
deleted file mode 100644
index f7daeea598e4..000000000000
--- a/drivers/char/pcmcia/ipwireless/network.c
+++ /dev/null
@@ -1,508 +0,0 @@
-/*
- * IPWireless 3G PCMCIA Network Driver
- *
- * Original code
- * by Stephen Blackheath <stephen@blacksapphire.com>,
- * Ben Martel <benm@symmetric.co.nz>
- *
- * Copyrighted as follows:
- * Copyright (C) 2004 by Symmetric Systems Ltd (NZ)
- *
- * Various driver changes and rewrites, port to new kernels
- * Copyright (C) 2006-2007 Jiri Kosina
- *
- * Misc code cleanups and updates
- * Copyright (C) 2007 David Sterba
- */
-
-#include <linux/interrupt.h>
-#include <linux/kernel.h>
-#include <linux/mutex.h>
-#include <linux/netdevice.h>
-#include <linux/ppp_channel.h>
-#include <linux/ppp_defs.h>
-#include <linux/slab.h>
-#include <linux/if_ppp.h>
-#include <linux/skbuff.h>
-
-#include "network.h"
-#include "hardware.h"
-#include "main.h"
-#include "tty.h"
-
-#define MAX_ASSOCIATED_TTYS 2
-
-#define SC_RCV_BITS (SC_RCV_B7_1|SC_RCV_B7_0|SC_RCV_ODDP|SC_RCV_EVNP)
-
-struct ipw_network {
- /* Hardware context, used for calls to hardware layer. */
- struct ipw_hardware *hardware;
- /* Context for kernel 'generic_ppp' functionality */
- struct ppp_channel *ppp_channel;
- /* tty context connected with IPW console */
- struct ipw_tty *associated_ttys[NO_OF_IPW_CHANNELS][MAX_ASSOCIATED_TTYS];
- /* True if ppp needs waking up once we're ready to xmit */
- int ppp_blocked;
- /* Number of packets queued up in hardware module. */
- int outgoing_packets_queued;
- /* Spinlock to avoid interrupts during shutdown */
- spinlock_t lock;
- struct mutex close_lock;
-
- /* PPP ioctl data, not actually used anywere */
- unsigned int flags;
- unsigned int rbits;
- u32 xaccm[8];
- u32 raccm;
- int mru;
-
- int shutting_down;
- unsigned int ras_control_lines;
-
- struct work_struct work_go_online;
- struct work_struct work_go_offline;
-};
-
-static void notify_packet_sent(void *callback_data, unsigned int packet_length)
-{
- struct ipw_network *network = callback_data;
- unsigned long flags;
-
- spin_lock_irqsave(&network->lock, flags);
- network->outgoing_packets_queued--;
- if (network->ppp_channel != NULL) {
- if (network->ppp_blocked) {
- network->ppp_blocked = 0;
- spin_unlock_irqrestore(&network->lock, flags);
- ppp_output_wakeup(network->ppp_channel);
- if (ipwireless_debug)
- printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME
- ": ppp unblocked\n");
- } else
- spin_unlock_irqrestore(&network->lock, flags);
- } else
- spin_unlock_irqrestore(&network->lock, flags);
-}
-
-/*
- * Called by the ppp system when it has a packet to send to the hardware.
- */
-static int ipwireless_ppp_start_xmit(struct ppp_channel *ppp_channel,
- struct sk_buff *skb)
-{
- struct ipw_network *network = ppp_channel->private;
- unsigned long flags;
-
- spin_lock_irqsave(&network->lock, flags);
- if (network->outgoing_packets_queued < ipwireless_out_queue) {
- unsigned char *buf;
- static unsigned char header[] = {
- PPP_ALLSTATIONS, /* 0xff */
- PPP_UI, /* 0x03 */
- };
- int ret;
-
- network->outgoing_packets_queued++;
- spin_unlock_irqrestore(&network->lock, flags);
-
- /*
- * If we have the requested amount of headroom in the skb we
- * were handed, then we can add the header efficiently.
- */
- if (skb_headroom(skb) >= 2) {
- memcpy(skb_push(skb, 2), header, 2);
- ret = ipwireless_send_packet(network->hardware,
- IPW_CHANNEL_RAS, skb->data,
- skb->len,
- notify_packet_sent,
- network);
- if (ret == -1) {
- skb_pull(skb, 2);
- return 0;
- }
- } else {
- /* Otherwise (rarely) we do it inefficiently. */
- buf = kmalloc(skb->len + 2, GFP_ATOMIC);
- if (!buf)
- return 0;
- memcpy(buf + 2, skb->data, skb->len);
- memcpy(buf, header, 2);
- ret = ipwireless_send_packet(network->hardware,
- IPW_CHANNEL_RAS, buf,
- skb->len + 2,
- notify_packet_sent,
- network);
- kfree(buf);
- if (ret == -1)
- return 0;
- }
- kfree_skb(skb);
- return 1;
- } else {
- /*
- * Otherwise reject the packet, and flag that the ppp system
- * needs to be unblocked once we are ready to send.
- */
- network->ppp_blocked = 1;
- spin_unlock_irqrestore(&network->lock, flags);
- if (ipwireless_debug)
- printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME ": ppp blocked\n");
- return 0;
- }
-}
-
-/* Handle an ioctl call that has come in via ppp. (copy of ppp_async_ioctl() */
-static int ipwireless_ppp_ioctl(struct ppp_channel *ppp_channel,
- unsigned int cmd, unsigned long arg)
-{
- struct ipw_network *network = ppp_channel->private;
- int err, val;
- u32 accm[8];
- int __user *user_arg = (int __user *) arg;
-
- err = -EFAULT;
- switch (cmd) {
- case PPPIOCGFLAGS:
- val = network->flags | network->rbits;
- if (put_user(val, user_arg))
- break;
- err = 0;
- break;
-
- case PPPIOCSFLAGS:
- if (get_user(val, user_arg))
- break;
- network->flags = val & ~SC_RCV_BITS;
- network->rbits = val & SC_RCV_BITS;
- err = 0;
- break;
-
- case PPPIOCGASYNCMAP:
- if (put_user(network->xaccm[0], user_arg))
- break;
- err = 0;
- break;
-
- case PPPIOCSASYNCMAP:
- if (get_user(network->xaccm[0], user_arg))
- break;
- err = 0;
- break;
-
- case PPPIOCGRASYNCMAP:
- if (put_user(network->raccm, user_arg))
- break;
- err = 0;
- break;
-
- case PPPIOCSRASYNCMAP:
- if (get_user(network->raccm, user_arg))
- break;
- err = 0;
- break;
-
- case PPPIOCGXASYNCMAP:
- if (copy_to_user((void __user *) arg, network->xaccm,
- sizeof(network->xaccm)))
- break;
- err = 0;
- break;
-
- case PPPIOCSXASYNCMAP:
- if (copy_from_user(accm, (void __user *) arg, sizeof(accm)))
- break;
- accm[2] &= ~0x40000000U; /* can't escape 0x5e */
- accm[3] |= 0x60000000U; /* must escape 0x7d, 0x7e */
- memcpy(network->xaccm, accm, sizeof(network->xaccm));
- err = 0;
- break;
-
- case PPPIOCGMRU:
- if (put_user(network->mru, user_arg))
- break;
- err = 0;
- break;
-
- case PPPIOCSMRU:
- if (get_user(val, user_arg))
- break;
- if (val < PPP_MRU)
- val = PPP_MRU;
- network->mru = val;
- err = 0;
- break;
-
- default:
- err = -ENOTTY;
- }
-
- return err;
-}
-
-static const struct ppp_channel_ops ipwireless_ppp_channel_ops = {
- .start_xmit = ipwireless_ppp_start_xmit,
- .ioctl = ipwireless_ppp_ioctl
-};
-
-static void do_go_online(struct work_struct *work_go_online)
-{
- struct ipw_network *network =
- container_of(work_go_online, struct ipw_network,
- work_go_online);
- unsigned long flags;
-
- spin_lock_irqsave(&network->lock, flags);
- if (!network->ppp_channel) {
- struct ppp_channel *channel;
-
- spin_unlock_irqrestore(&network->lock, flags);
- channel = kzalloc(sizeof(struct ppp_channel), GFP_KERNEL);
- if (!channel) {
- printk(KERN_ERR IPWIRELESS_PCCARD_NAME
- ": unable to allocate PPP channel\n");
- return;
- }
- channel->private = network;
- channel->mtu = 16384; /* Wild guess */
- channel->hdrlen = 2;
- channel->ops = &ipwireless_ppp_channel_ops;
-
- network->flags = 0;
- network->rbits = 0;
- network->mru = PPP_MRU;
- memset(network->xaccm, 0, sizeof(network->xaccm));
- network->xaccm[0] = ~0U;
- network->xaccm[3] = 0x60000000U;
- network->raccm = ~0U;
- ppp_register_channel(channel);
- spin_lock_irqsave(&network->lock, flags);
- network->ppp_channel = channel;
- }
- spin_unlock_irqrestore(&network->lock, flags);
-}
-
-static void do_go_offline(struct work_struct *work_go_offline)
-{
- struct ipw_network *network =
- container_of(work_go_offline, struct ipw_network,
- work_go_offline);
- unsigned long flags;
-
- mutex_lock(&network->close_lock);
- spin_lock_irqsave(&network->lock, flags);
- if (network->ppp_channel != NULL) {
- struct ppp_channel *channel = network->ppp_channel;
-
- network->ppp_channel = NULL;
- spin_unlock_irqrestore(&network->lock, flags);
- mutex_unlock(&network->close_lock);
- ppp_unregister_channel(channel);
- } else {
- spin_unlock_irqrestore(&network->lock, flags);
- mutex_unlock(&network->close_lock);
- }
-}
-
-void ipwireless_network_notify_control_line_change(struct ipw_network *network,
- unsigned int channel_idx,
- unsigned int control_lines,
- unsigned int changed_mask)
-{
- int i;
-
- if (channel_idx == IPW_CHANNEL_RAS)
- network->ras_control_lines = control_lines;
-
- for (i = 0; i < MAX_ASSOCIATED_TTYS; i++) {
- struct ipw_tty *tty =
- network->associated_ttys[channel_idx][i];
-
- /*
- * If it's associated with a tty (other than the RAS channel
- * when we're online), then send the data to that tty. The RAS
- * channel's data is handled above - it always goes through
- * ppp_generic.
- */
- if (tty)
- ipwireless_tty_notify_control_line_change(tty,
- channel_idx,
- control_lines,
- changed_mask);
- }
-}
-
-/*
- * Some versions of firmware stuff packets with 0xff 0x03 (PPP: ALLSTATIONS, UI)
- * bytes, which are required on sent packet, but not always present on received
- * packets
- */
-static struct sk_buff *ipw_packet_received_skb(unsigned char *data,
- unsigned int length)
-{
- struct sk_buff *skb;
-
- if (length > 2 && data[0] == PPP_ALLSTATIONS && data[1] == PPP_UI) {
- length -= 2;
- data += 2;
- }
-
- skb = dev_alloc_skb(length + 4);
- skb_reserve(skb, 2);
- memcpy(skb_put(skb, length), data, length);
-
- return skb;
-}
-
-void ipwireless_network_packet_received(struct ipw_network *network,
- unsigned int channel_idx,
- unsigned char *data,
- unsigned int length)
-{
- int i;
- unsigned long flags;
-
- for (i = 0; i < MAX_ASSOCIATED_TTYS; i++) {
- struct ipw_tty *tty = network->associated_ttys[channel_idx][i];
-
- if (!tty)
- continue;
-
- /*
- * If it's associated with a tty (other than the RAS channel
- * when we're online), then send the data to that tty. The RAS
- * channel's data is handled above - it always goes through
- * ppp_generic.
- */
- if (channel_idx == IPW_CHANNEL_RAS
- && (network->ras_control_lines &
- IPW_CONTROL_LINE_DCD) != 0
- && ipwireless_tty_is_modem(tty)) {
- /*
- * If data came in on the RAS channel and this tty is
- * the modem tty, and we are online, then we send it to
- * the PPP layer.
- */
- mutex_lock(&network->close_lock);
- spin_lock_irqsave(&network->lock, flags);
- if (network->ppp_channel != NULL) {
- struct sk_buff *skb;
-
- spin_unlock_irqrestore(&network->lock,
- flags);
-
- /* Send the data to the ppp_generic module. */
- skb = ipw_packet_received_skb(data, length);
- ppp_input(network->ppp_channel, skb);
- } else
- spin_unlock_irqrestore(&network->lock,
- flags);
- mutex_unlock(&network->close_lock);
- }
- /* Otherwise we send it out the tty. */
- else
- ipwireless_tty_received(tty, data, length);
- }
-}
-
-struct ipw_network *ipwireless_network_create(struct ipw_hardware *hw)
-{
- struct ipw_network *network =
- kzalloc(sizeof(struct ipw_network), GFP_ATOMIC);
-
- if (!network)
- return NULL;
-
- spin_lock_init(&network->lock);
- mutex_init(&network->close_lock);
-
- network->hardware = hw;
-
- INIT_WORK(&network->work_go_online, do_go_online);
- INIT_WORK(&network->work_go_offline, do_go_offline);
-
- ipwireless_associate_network(hw, network);
-
- return network;
-}
-
-void ipwireless_network_free(struct ipw_network *network)
-{
- network->shutting_down = 1;
-
- ipwireless_ppp_close(network);
- flush_work_sync(&network->work_go_online);
- flush_work_sync(&network->work_go_offline);
-
- ipwireless_stop_interrupts(network->hardware);
- ipwireless_associate_network(network->hardware, NULL);
-
- kfree(network);
-}
-
-void ipwireless_associate_network_tty(struct ipw_network *network,
- unsigned int channel_idx,
- struct ipw_tty *tty)
-{
- int i;
-
- for (i = 0; i < MAX_ASSOCIATED_TTYS; i++)
- if (network->associated_ttys[channel_idx][i] == NULL) {
- network->associated_ttys[channel_idx][i] = tty;
- break;
- }
-}
-
-void ipwireless_disassociate_network_ttys(struct ipw_network *network,
- unsigned int channel_idx)
-{
- int i;
-
- for (i = 0; i < MAX_ASSOCIATED_TTYS; i++)
- network->associated_ttys[channel_idx][i] = NULL;
-}
-
-void ipwireless_ppp_open(struct ipw_network *network)
-{
- if (ipwireless_debug)
- printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME ": online\n");
- schedule_work(&network->work_go_online);
-}
-
-void ipwireless_ppp_close(struct ipw_network *network)
-{
- /* Disconnect from the wireless network. */
- if (ipwireless_debug)
- printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME ": offline\n");
- schedule_work(&network->work_go_offline);
-}
-
-int ipwireless_ppp_channel_index(struct ipw_network *network)
-{
- int ret = -1;
- unsigned long flags;
-
- spin_lock_irqsave(&network->lock, flags);
- if (network->ppp_channel != NULL)
- ret = ppp_channel_index(network->ppp_channel);
- spin_unlock_irqrestore(&network->lock, flags);
-
- return ret;
-}
-
-int ipwireless_ppp_unit_number(struct ipw_network *network)
-{
- int ret = -1;
- unsigned long flags;
-
- spin_lock_irqsave(&network->lock, flags);
- if (network->ppp_channel != NULL)
- ret = ppp_unit_number(network->ppp_channel);
- spin_unlock_irqrestore(&network->lock, flags);
-
- return ret;
-}
-
-int ipwireless_ppp_mru(const struct ipw_network *network)
-{
- return network->mru;
-}