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-rw-r--r--drivers/tty/moxa.c5
-rw-r--r--drivers/tty/mxser.c4
-rw-r--r--drivers/tty/n_gsm.c401
-rw-r--r--drivers/tty/n_tty.c2
-rw-r--r--drivers/tty/serial/8250.c4
-rw-r--r--drivers/tty/serial/8250_pci.c183
-rw-r--r--drivers/tty/serial/Kconfig2
-rw-r--r--drivers/tty/serial/pch_uart.c11
-rw-r--r--drivers/tty/serial/s5pv210.c4
-rw-r--r--drivers/tty/serial/samsung.c27
-rw-r--r--drivers/tty/tty_io.c4
11 files changed, 591 insertions, 56 deletions
diff --git a/drivers/tty/moxa.c b/drivers/tty/moxa.c
index ba679ce0a77..d15a071b1a5 100644
--- a/drivers/tty/moxa.c
+++ b/drivers/tty/moxa.c
@@ -44,6 +44,7 @@
#include <linux/init.h>
#include <linux/bitops.h>
#include <linux/slab.h>
+#include <linux/ratelimit.h>
#include <asm/system.h>
#include <asm/io.h>
@@ -242,8 +243,8 @@ static void moxa_wait_finish(void __iomem *ofsAddr)
while (readw(ofsAddr + FuncCode) != 0)
if (time_after(jiffies, end))
return;
- if (readw(ofsAddr + FuncCode) != 0 && printk_ratelimit())
- printk(KERN_WARNING "moxa function expired\n");
+ if (readw(ofsAddr + FuncCode) != 0)
+ printk_ratelimited(KERN_WARNING "moxa function expired\n");
}
static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg)
diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c
index d188f378684..7fc8c02fea6 100644
--- a/drivers/tty/mxser.c
+++ b/drivers/tty/mxser.c
@@ -39,6 +39,7 @@
#include <linux/pci.h>
#include <linux/bitops.h>
#include <linux/slab.h>
+#include <linux/ratelimit.h>
#include <asm/system.h>
#include <asm/io.h>
@@ -1490,8 +1491,7 @@ static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
switch (cmd) {
case MOXA_GET_MAJOR:
- if (printk_ratelimit())
- printk(KERN_WARNING "mxser: '%s' uses deprecated ioctl "
+ printk_ratelimited(KERN_WARNING "mxser: '%s' uses deprecated ioctl "
"%x (GET_MAJOR), fix your userspace\n",
current->comm, cmd);
return put_user(ttymajor, (int __user *)argp);
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index 19b4ae052af..8a50e4eebf1 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -58,6 +58,10 @@
#include <linux/serial.h>
#include <linux/kfifo.h>
#include <linux/skbuff.h>
+#include <net/arp.h>
+#include <linux/ip.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
#include <linux/gsmmux.h>
static int debug;
@@ -77,8 +81,24 @@ module_param(debug, int, 0600);
* Semi-arbitrary buffer size limits. 0710 is normally run with 32-64 byte
* limits so this is plenty
*/
-#define MAX_MRU 512
-#define MAX_MTU 512
+#define MAX_MRU 1500
+#define MAX_MTU 1500
+#define GSM_NET_TX_TIMEOUT (HZ*10)
+
+/**
+ * struct gsm_mux_net - network interface
+ * @struct gsm_dlci* dlci
+ * @struct net_device_stats stats;
+ *
+ * Created when net interface is initialized.
+ **/
+struct gsm_mux_net {
+ struct kref ref;
+ struct gsm_dlci *dlci;
+ struct net_device_stats stats;
+};
+
+#define STATS(net) (((struct gsm_mux_net *)netdev_priv(net))->stats)
/*
* Each block of data we have queued to go out is in the form of
@@ -113,6 +133,8 @@ struct gsm_dlci {
#define DLCI_OPENING 1 /* Sending SABM not seen UA */
#define DLCI_OPEN 2 /* SABM/UA complete */
#define DLCI_CLOSING 3 /* Sending DISC not seen UA/DM */
+ struct kref ref; /* freed from port or mux close */
+ struct mutex mutex;
/* Link layer */
spinlock_t lock; /* Protects the internal state */
@@ -123,6 +145,7 @@ struct gsm_dlci {
struct kfifo *fifo; /* Queue fifo for the DLCI */
struct kfifo _fifo; /* For new fifo API porting only */
int adaption; /* Adaption layer in use */
+ int prev_adaption;
u32 modem_rx; /* Our incoming virtual modem lines */
u32 modem_tx; /* Our outgoing modem lines */
int dead; /* Refuse re-open */
@@ -134,6 +157,8 @@ struct gsm_dlci {
struct sk_buff_head skb_list; /* Queued frames */
/* Data handling callback */
void (*data)(struct gsm_dlci *dlci, u8 *data, int len);
+ void (*prev_data)(struct gsm_dlci *dlci, u8 *data, int len);
+ struct net_device *net; /* network interface, if created */
};
/* DLCI 0, 62/63 are special or reseved see gsmtty_open */
@@ -169,6 +194,8 @@ struct gsm_control {
struct gsm_mux {
struct tty_struct *tty; /* The tty our ldisc is bound to */
spinlock_t lock;
+ unsigned int num;
+ struct kref ref;
/* Events on the GSM channel */
wait_queue_head_t event;
@@ -250,6 +277,8 @@ struct gsm_mux {
static struct gsm_mux *gsm_mux[MAX_MUX]; /* GSM muxes */
static spinlock_t gsm_mux_lock;
+static struct tty_driver *gsm_tty_driver;
+
/*
* This section of the driver logic implements the GSM encodings
* both the basic and the 'advanced'. Reliable transport is not
@@ -878,8 +907,10 @@ static int gsm_dlci_data_output_framed(struct gsm_mux *gsm,
memcpy(dp, dlci->skb->data, len);
skb_pull(dlci->skb, len);
__gsm_data_queue(dlci, msg);
- if (last)
+ if (last) {
+ kfree_skb(dlci->skb);
dlci->skb = NULL;
+ }
return size;
}
@@ -912,7 +943,7 @@ static void gsm_dlci_data_sweep(struct gsm_mux *gsm)
i++;
continue;
}
- if (dlci->adaption < 3)
+ if (dlci->adaption < 3 && !dlci->net)
len = gsm_dlci_data_output(gsm, dlci);
else
len = gsm_dlci_data_output_framed(gsm, dlci);
@@ -939,9 +970,12 @@ static void gsm_dlci_data_kick(struct gsm_dlci *dlci)
spin_lock_irqsave(&dlci->gsm->tx_lock, flags);
/* If we have nothing running then we need to fire up */
- if (dlci->gsm->tx_bytes == 0)
- gsm_dlci_data_output(dlci->gsm, dlci);
- else if (dlci->gsm->tx_bytes < TX_THRESH_LO)
+ if (dlci->gsm->tx_bytes == 0) {
+ if (dlci->net)
+ gsm_dlci_data_output_framed(dlci->gsm, dlci);
+ else
+ gsm_dlci_data_output(dlci->gsm, dlci);
+ } else if (dlci->gsm->tx_bytes < TX_THRESH_LO)
gsm_dlci_data_sweep(dlci->gsm);
spin_unlock_irqrestore(&dlci->gsm->tx_lock, flags);
}
@@ -1588,6 +1622,8 @@ static struct gsm_dlci *gsm_dlci_alloc(struct gsm_mux *gsm, int addr)
if (dlci == NULL)
return NULL;
spin_lock_init(&dlci->lock);
+ kref_init(&dlci->ref);
+ mutex_init(&dlci->mutex);
dlci->fifo = &dlci->_fifo;
if (kfifo_alloc(&dlci->_fifo, 4096, GFP_KERNEL) < 0) {
kfree(dlci);
@@ -1613,26 +1649,52 @@ static struct gsm_dlci *gsm_dlci_alloc(struct gsm_mux *gsm, int addr)
}
/**
- * gsm_dlci_free - release DLCI
+ * gsm_dlci_free - free DLCI
+ * @dlci: DLCI to free
+ *
+ * Free up a DLCI.
+ *
+ * Can sleep.
+ */
+static void gsm_dlci_free(struct kref *ref)
+{
+ struct gsm_dlci *dlci = container_of(ref, struct gsm_dlci, ref);
+
+ del_timer_sync(&dlci->t1);
+ dlci->gsm->dlci[dlci->addr] = NULL;
+ kfifo_free(dlci->fifo);
+ while ((dlci->skb = skb_dequeue(&dlci->skb_list)))
+ kfree_skb(dlci->skb);
+ kfree(dlci);
+}
+
+static inline void dlci_get(struct gsm_dlci *dlci)
+{
+ kref_get(&dlci->ref);
+}
+
+static inline void dlci_put(struct gsm_dlci *dlci)
+{
+ kref_put(&dlci->ref, gsm_dlci_free);
+}
+
+/**
+ * gsm_dlci_release - release DLCI
* @dlci: DLCI to destroy
*
- * Free up a DLCI. Currently to keep the lifetime rules sane we only
- * clean up DLCI objects when the MUX closes rather than as the port
- * is closed down on both the tty and mux levels.
+ * Release a DLCI. Actual free is deferred until either
+ * mux is closed or tty is closed - whichever is last.
*
* Can sleep.
*/
-static void gsm_dlci_free(struct gsm_dlci *dlci)
+static void gsm_dlci_release(struct gsm_dlci *dlci)
{
struct tty_struct *tty = tty_port_tty_get(&dlci->port);
if (tty) {
tty_vhangup(tty);
tty_kref_put(tty);
}
- del_timer_sync(&dlci->t1);
- dlci->gsm->dlci[dlci->addr] = NULL;
- kfifo_free(dlci->fifo);
- kfree(dlci);
+ dlci_put(dlci);
}
/*
@@ -1823,10 +1885,6 @@ static void gsm0_receive(struct gsm_mux *gsm, unsigned char c)
break;
case GSM_FCS: /* FCS follows the packet */
gsm->received_fcs = c;
- if (c == GSM0_SOF) {
- gsm->state = GSM_SEARCH;
- break;
- }
gsm_queue(gsm);
gsm->state = GSM_SSOF;
break;
@@ -1970,7 +2028,7 @@ void gsm_cleanup_mux(struct gsm_mux *gsm)
/* Free up any link layer users */
for (i = 0; i < NUM_DLCI; i++)
if (gsm->dlci[i])
- gsm_dlci_free(gsm->dlci[i]);
+ gsm_dlci_release(gsm->dlci[i]);
/* Now wipe the queues */
for (txq = gsm->tx_head; txq != NULL; txq = gsm->tx_head) {
gsm->tx_head = txq->next;
@@ -2010,6 +2068,7 @@ int gsm_activate_mux(struct gsm_mux *gsm)
spin_lock(&gsm_mux_lock);
for (i = 0; i < MAX_MUX; i++) {
if (gsm_mux[i] == NULL) {
+ gsm->num = i;
gsm_mux[i] = gsm;
break;
}
@@ -2030,8 +2089,7 @@ EXPORT_SYMBOL_GPL(gsm_activate_mux);
* gsm_free_mux - free up a mux
* @mux: mux to free
*
- * Dispose of allocated resources for a dead mux. No refcounting
- * at present so the mux must be truly dead.
+ * Dispose of allocated resources for a dead mux
*/
void gsm_free_mux(struct gsm_mux *gsm)
{
@@ -2042,6 +2100,28 @@ void gsm_free_mux(struct gsm_mux *gsm)
EXPORT_SYMBOL_GPL(gsm_free_mux);
/**
+ * gsm_free_muxr - free up a mux
+ * @mux: mux to free
+ *
+ * Dispose of allocated resources for a dead mux
+ */
+static void gsm_free_muxr(struct kref *ref)
+{
+ struct gsm_mux *gsm = container_of(ref, struct gsm_mux, ref);
+ gsm_free_mux(gsm);
+}
+
+static inline void mux_get(struct gsm_mux *gsm)
+{
+ kref_get(&gsm->ref);
+}
+
+static inline void mux_put(struct gsm_mux *gsm)
+{
+ kref_put(&gsm->ref, gsm_free_muxr);
+}
+
+/**
* gsm_alloc_mux - allocate a mux
*
* Creates a new mux ready for activation.
@@ -2064,12 +2144,12 @@ struct gsm_mux *gsm_alloc_mux(void)
return NULL;
}
spin_lock_init(&gsm->lock);
+ kref_init(&gsm->ref);
gsm->t1 = T1;
gsm->t2 = T2;
gsm->n2 = N2;
gsm->ftype = UIH;
- gsm->initiator = 0;
gsm->adaption = 1;
gsm->encoding = 1;
gsm->mru = 64; /* Default to encoding 1 so these should be 64 */
@@ -2115,13 +2195,20 @@ static int gsmld_output(struct gsm_mux *gsm, u8 *data, int len)
static int gsmld_attach_gsm(struct tty_struct *tty, struct gsm_mux *gsm)
{
- int ret;
+ int ret, i;
+ int base = gsm->num << 6; /* Base for this MUX */
gsm->tty = tty_kref_get(tty);
gsm->output = gsmld_output;
ret = gsm_activate_mux(gsm);
if (ret != 0)
tty_kref_put(gsm->tty);
+ else {
+ /* Don't register device 0 - this is the control channel and not
+ a usable tty interface */
+ for (i = 1; i < NUM_DLCI; i++)
+ tty_register_device(gsm_tty_driver, base + i, NULL);
+ }
return ret;
}
@@ -2136,7 +2223,12 @@ static int gsmld_attach_gsm(struct tty_struct *tty, struct gsm_mux *gsm)
static void gsmld_detach_gsm(struct tty_struct *tty, struct gsm_mux *gsm)
{
+ int i;
+ int base = gsm->num << 6; /* Base for this MUX */
+
WARN_ON(tty != gsm->tty);
+ for (i = 1; i < NUM_DLCI; i++)
+ tty_unregister_device(gsm_tty_driver, base + i);
gsm_cleanup_mux(gsm);
tty_kref_put(gsm->tty);
gsm->tty = NULL;
@@ -2224,7 +2316,7 @@ static void gsmld_close(struct tty_struct *tty)
gsmld_flush_buffer(tty);
/* Do other clean up here */
- gsm_free_mux(gsm);
+ mux_put(gsm);
}
/**
@@ -2476,6 +2568,220 @@ static int gsmld_ioctl(struct tty_struct *tty, struct file *file,
}
}
+/*
+ * Network interface
+ *
+ */
+
+static int gsm_mux_net_open(struct net_device *net)
+{
+ pr_debug("%s called\n", __func__);
+ netif_start_queue(net);
+ return 0;
+}
+
+static int gsm_mux_net_close(struct net_device *net)
+{
+ netif_stop_queue(net);
+ return 0;
+}
+
+static struct net_device_stats *gsm_mux_net_get_stats(struct net_device *net)
+{
+ return &((struct gsm_mux_net *)netdev_priv(net))->stats;
+}
+static void dlci_net_free(struct gsm_dlci *dlci)
+{
+ if (!dlci->net) {
+ WARN_ON(1);
+ return;
+ }
+ dlci->adaption = dlci->prev_adaption;
+ dlci->data = dlci->prev_data;
+ free_netdev(dlci->net);
+ dlci->net = NULL;
+}
+static void net_free(struct kref *ref)
+{
+ struct gsm_mux_net *mux_net;
+ struct gsm_dlci *dlci;
+
+ mux_net = container_of(ref, struct gsm_mux_net, ref);
+ dlci = mux_net->dlci;
+
+ if (dlci->net) {
+ unregister_netdev(dlci->net);
+ dlci_net_free(dlci);
+ }
+}
+
+static inline void muxnet_get(struct gsm_mux_net *mux_net)
+{
+ kref_get(&mux_net->ref);
+}
+
+static inline void muxnet_put(struct gsm_mux_net *mux_net)
+{
+ kref_put(&mux_net->ref, net_free);
+}
+
+static int gsm_mux_net_start_xmit(struct sk_buff *skb,
+ struct net_device *net)
+{
+ struct gsm_mux_net *mux_net = (struct gsm_mux_net *)netdev_priv(net);
+ struct gsm_dlci *dlci = mux_net->dlci;
+ muxnet_get(mux_net);
+
+ skb_queue_head(&dlci->skb_list, skb);
+ STATS(net).tx_packets++;
+ STATS(net).tx_bytes += skb->len;
+ gsm_dlci_data_kick(dlci);
+ /* And tell the kernel when the last transmit started. */
+ net->trans_start = jiffies;
+ muxnet_put(mux_net);
+ return NETDEV_TX_OK;
+}
+
+/* called when a packet did not ack after watchdogtimeout */
+static void gsm_mux_net_tx_timeout(struct net_device *net)
+{
+ /* Tell syslog we are hosed. */
+ dev_dbg(&net->dev, "Tx timed out.\n");
+
+ /* Update statistics */
+ STATS(net).tx_errors++;
+}
+
+static void gsm_mux_rx_netchar(struct gsm_dlci *dlci,
+ unsigned char *in_buf, int size)
+{
+ struct net_device *net = dlci->net;
+ struct sk_buff *skb;
+ struct gsm_mux_net *mux_net = (struct gsm_mux_net *)netdev_priv(net);
+ muxnet_get(mux_net);
+
+ /* Allocate an sk_buff */
+ skb = dev_alloc_skb(size + NET_IP_ALIGN);
+ if (!skb) {
+ /* We got no receive buffer. */
+ STATS(net).rx_dropped++;
+ muxnet_put(mux_net);
+ return;
+ }
+ skb_reserve(skb, NET_IP_ALIGN);
+ memcpy(skb_put(skb, size), in_buf, size);
+
+ skb->dev = net;
+ skb->protocol = __constant_htons(ETH_P_IP);
+
+ /* Ship it off to the kernel */
+ netif_rx(skb);
+
+ /* update out statistics */
+ STATS(net).rx_packets++;
+ STATS(net).rx_bytes += size;
+ muxnet_put(mux_net);
+ return;
+}
+
+int gsm_change_mtu(struct net_device *net, int new_mtu)
+{
+ struct gsm_mux_net *mux_net = (struct gsm_mux_net *)netdev_priv(net);
+ if ((new_mtu < 8) || (new_mtu > mux_net->dlci->gsm->mtu))
+ return -EINVAL;
+ net->mtu = new_mtu;
+ return 0;
+}
+
+static void gsm_mux_net_init(struct net_device *net)
+{
+ static const struct net_device_ops gsm_netdev_ops = {
+ .ndo_open = gsm_mux_net_open,
+ .ndo_stop = gsm_mux_net_close,
+ .ndo_start_xmit = gsm_mux_net_start_xmit,
+ .ndo_tx_timeout = gsm_mux_net_tx_timeout,
+ .ndo_get_stats = gsm_mux_net_get_stats,
+ .ndo_change_mtu = gsm_change_mtu,
+ };
+
+ net->netdev_ops = &gsm_netdev_ops;
+
+ /* fill in the other fields */
+ net->watchdog_timeo = GSM_NET_TX_TIMEOUT;
+ net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
+ net->type = ARPHRD_NONE;
+ net->tx_queue_len = 10;
+}
+
+
+/* caller holds the dlci mutex */
+static void gsm_destroy_network(struct gsm_dlci *dlci)
+{
+ struct gsm_mux_net *mux_net;
+
+ pr_debug("destroy network interface");
+ if (!dlci->net)
+ return;
+ mux_net = (struct gsm_mux_net *)netdev_priv(dlci->net);
+ muxnet_put(mux_net);
+}
+
+
+/* caller holds the dlci mutex */
+static int gsm_create_network(struct gsm_dlci *dlci, struct gsm_netconfig *nc)
+{
+ char *netname;
+ int retval = 0;
+ struct net_device *net;
+ struct gsm_mux_net *mux_net;
+
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ /* Already in a non tty mode */
+ if (dlci->adaption > 2)
+ return -EBUSY;
+
+ if (nc->protocol != htons(ETH_P_IP))
+ return -EPROTONOSUPPORT;
+
+ if (nc->adaption != 3 && nc->adaption != 4)
+ return -EPROTONOSUPPORT;
+
+ pr_debug("create network interface");
+
+ netname = "gsm%d";
+ if (nc->if_name[0] != '\0')
+ netname = nc->if_name;
+ net = alloc_netdev(sizeof(struct gsm_mux_net),
+ netname,
+ gsm_mux_net_init);
+ if (!net) {
+ pr_err("alloc_netdev failed");
+ return -ENOMEM;
+ }
+ net->mtu = dlci->gsm->mtu;
+ mux_net = (struct gsm_mux_net *)netdev_priv(net);
+ mux_net->dlci = dlci;
+ kref_init(&mux_net->ref);
+ strncpy(nc->if_name, net->name, IFNAMSIZ); /* return net name */
+
+ /* reconfigure dlci for network */
+ dlci->prev_adaption = dlci->adaption;
+ dlci->prev_data = dlci->data;
+ dlci->adaption = nc->adaption;
+ dlci->data = gsm_mux_rx_netchar;
+ dlci->net = net;
+
+ pr_debug("register netdev");
+ retval = register_netdev(net);
+ if (retval) {
+ pr_err("network register fail %d\n", retval);
+ dlci_net_free(dlci);
+ return retval;
+ }
+ return net->ifindex; /* return network index */
+}
/* Line discipline for real tty */
struct tty_ldisc_ops tty_ldisc_packet = {
@@ -2579,6 +2885,9 @@ static int gsmtty_open(struct tty_struct *tty, struct file *filp)
port = &dlci->port;
port->count++;
tty->driver_data = dlci;
+ dlci_get(dlci);
+ dlci_get(dlci->gsm->dlci[0]);
+ mux_get(dlci->gsm);
tty_port_tty_set(port, tty);
dlci->modem_rx = 0;
@@ -2594,13 +2903,23 @@ static int gsmtty_open(struct tty_struct *tty, struct file *filp)
static void gsmtty_close(struct tty_struct *tty, struct file *filp)
{
struct gsm_dlci *dlci = tty->driver_data;
+ struct gsm_mux *gsm;
+
if (dlci == NULL)
return;
+ mutex_lock(&dlci->mutex);
+ gsm_destroy_network(dlci);
+ mutex_unlock(&dlci->mutex);
+ gsm = dlci->gsm;
if (tty_port_close_start(&dlci->port, tty, filp) == 0)
- return;
+ goto out;
gsm_dlci_begin_close(dlci);
tty_port_close_end(&dlci->port, tty);
tty_port_tty_set(&dlci->port, NULL);
+out:
+ dlci_put(dlci);
+ dlci_put(gsm->dlci[0]);
+ mux_put(gsm);
}
static void gsmtty_hangup(struct tty_struct *tty)
@@ -2677,7 +2996,32 @@ static int gsmtty_tiocmset(struct tty_struct *tty,
static int gsmtty_ioctl(struct tty_struct *tty,
unsigned int cmd, unsigned long arg)
{
- return -ENOIOCTLCMD;
+ struct gsm_dlci *dlci = tty->driver_data;
+ struct gsm_netconfig nc;
+ int index;
+
+ switch (cmd) {
+ case GSMIOC_ENABLE_NET:
+ if (copy_from_user(&nc, (void __user *)arg, sizeof(nc)))
+ return -EFAULT;
+ nc.if_name[IFNAMSIZ-1] = '\0';
+ /* return net interface index or error code */
+ mutex_lock(&dlci->mutex);
+ index = gsm_create_network(dlci, &nc);
+ mutex_unlock(&dlci->mutex);
+ if (copy_to_user((void __user *)arg, &nc, sizeof(nc)))
+ return -EFAULT;
+ return index;
+ case GSMIOC_DISABLE_NET:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ mutex_lock(&dlci->mutex);
+ gsm_destroy_network(dlci);
+ mutex_unlock(&dlci->mutex);
+ return 0;
+ default:
+ return -ENOIOCTLCMD;
+ }
}
static void gsmtty_set_termios(struct tty_struct *tty, struct ktermios *old)
@@ -2726,7 +3070,6 @@ static int gsmtty_break_ctl(struct tty_struct *tty, int state)
return gsmtty_modem_update(dlci, encode);
}
-static struct tty_driver *gsm_tty_driver;
/* Virtual ttys for the demux */
static const struct tty_operations gsmtty_ops = {
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index c3954fbf6ac..39d6ab6551e 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -185,7 +185,6 @@ static void reset_buffer_flags(struct tty_struct *tty)
tty->canon_head = tty->canon_data = tty->erasing = 0;
memset(&tty->read_flags, 0, sizeof tty->read_flags);
n_tty_set_room(tty);
- check_unthrottle(tty);
}
/**
@@ -1587,6 +1586,7 @@ static int n_tty_open(struct tty_struct *tty)
return -ENOMEM;
}
reset_buffer_flags(tty);
+ tty_unthrottle(tty);
tty->column = 0;
n_tty_set_termios(tty, NULL);
tty->minimum_to_wake = 1;
diff --git a/drivers/tty/serial/8250.c b/drivers/tty/serial/8250.c
index b4129f53fb1..f2dfec82faf 100644
--- a/drivers/tty/serial/8250.c
+++ b/drivers/tty/serial/8250.c
@@ -81,7 +81,7 @@ static unsigned int skip_txen_test; /* force skip of txen test at init time */
#define DEBUG_INTR(fmt...) do { } while (0)
#endif
-#define PASS_LIMIT 256
+#define PASS_LIMIT 512
#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)
@@ -1107,7 +1107,7 @@ static void autoconfig_16550a(struct uart_8250_port *up)
*/
DEBUG_AUTOCONF("Xscale ");
up->port.type = PORT_XSCALE;
- up->capabilities |= UART_CAP_UUE;
+ up->capabilities |= UART_CAP_UUE | UART_CAP_RTOIE;
return;
}
} else {
diff --git a/drivers/tty/serial/8250_pci.c b/drivers/tty/serial/8250_pci.c
index cf35e0dc508..6b887d90a20 100644
--- a/drivers/tty/serial/8250_pci.c
+++ b/drivers/tty/serial/8250_pci.c
@@ -39,6 +39,7 @@ struct pci_serial_quirk {
u32 device;
u32 subvendor;
u32 subdevice;
+ int (*probe)(struct pci_dev *dev);
int (*init)(struct pci_dev *dev);
int (*setup)(struct serial_private *,
const struct pciserial_board *,
@@ -56,6 +57,9 @@ struct serial_private {
int line[0];
};
+static int pci_default_setup(struct serial_private*,
+ const struct pciserial_board*, struct uart_port*, int);
+
static void moan_device(const char *str, struct pci_dev *dev)
{
printk(KERN_WARNING
@@ -571,6 +575,28 @@ static const struct timedia_struct {
{ 8, timedia_eight_port }
};
+/*
+ * There are nearly 70 different Timedia/SUNIX PCI serial devices. Instead of
+ * listing them individually, this driver merely grabs them all with
+ * PCI_ANY_ID. Some of these devices, however, also feature a parallel port,
+ * and should be left free to be claimed by parport_serial instead.
+ */
+static int pci_timedia_probe(struct pci_dev *dev)
+{
+ /*
+ * Check the third digit of the subdevice ID
+ * (0,2,3,5,6: serial only -- 7,8,9: serial + parallel)
+ */
+ if ((dev->subsystem_device & 0x00f0) >= 0x70) {
+ dev_info(&dev->dev,
+ "ignoring Timedia subdevice %04x for parport_serial\n",
+ dev->subsystem_device);
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
static int pci_timedia_init(struct pci_dev *dev)
{
const unsigned short *ids;
@@ -752,6 +778,62 @@ pci_ni8430_setup(struct serial_private *priv,
return setup_port(priv, port, bar, offset, board->reg_shift);
}
+static int pci_netmos_9900_setup(struct serial_private *priv,
+ const struct pciserial_board *board,
+ struct uart_port *port, int idx)
+{
+ unsigned int bar;
+
+ if ((priv->dev->subsystem_device & 0xff00) == 0x3000) {
+ /* netmos apparently orders BARs by datasheet layout, so serial
+ * ports get BARs 0 and 3 (or 1 and 4 for memmapped)
+ */
+ bar = 3 * idx;
+
+ return setup_port(priv, port, bar, 0, board->reg_shift);
+ } else {
+ return pci_default_setup(priv, board, port, idx);
+ }
+}
+
+/* the 99xx series comes with a range of device IDs and a variety
+ * of capabilities:
+ *
+ * 9900 has varying capabilities and can cascade to sub-controllers
+ * (cascading should be purely internal)
+ * 9904 is hardwired with 4 serial ports
+ * 9912 and 9922 are hardwired with 2 serial ports
+ */
+static int pci_netmos_9900_numports(struct pci_dev *dev)
+{
+ unsigned int c = dev->class;
+ unsigned int pi;
+ unsigned short sub_serports;
+
+ pi = (c & 0xff);
+
+ if (pi == 2) {
+ return 1;
+ } else if ((pi == 0) &&
+ (dev->device == PCI_DEVICE_ID_NETMOS_9900)) {
+ /* two possibilities: 0x30ps encodes number of parallel and
+ * serial ports, or 0x1000 indicates *something*. This is not
+ * immediately obvious, since the 2s1p+4s configuration seems
+ * to offer all functionality on functions 0..2, while still
+ * advertising the same function 3 as the 4s+2s1p config.
+ */
+ sub_serports = dev->subsystem_device & 0xf;
+ if (sub_serports > 0) {
+ return sub_serports;
+ } else {
+ printk(KERN_NOTICE "NetMos/Mostech serial driver ignoring port on ambiguous config.\n");
+ return 0;
+ }
+ }
+
+ moan_device("unknown NetMos/Mostech program interface", dev);
+ return 0;
+}
static int pci_netmos_init(struct pci_dev *dev)
{
@@ -761,12 +843,28 @@ static int pci_netmos_init(struct pci_dev *dev)
if ((dev->device == PCI_DEVICE_ID_NETMOS_9901) ||
(dev->device == PCI_DEVICE_ID_NETMOS_9865))
return 0;
+
if (dev->subsystem_vendor == PCI_VENDOR_ID_IBM &&
dev->subsystem_device == 0x0299)
return 0;
+ switch (dev->device) { /* FALLTHROUGH on all */
+ case PCI_DEVICE_ID_NETMOS_9904:
+ case PCI_DEVICE_ID_NETMOS_9912:
+ case PCI_DEVICE_ID_NETMOS_9922:
+ case PCI_DEVICE_ID_NETMOS_9900:
+ num_serial = pci_netmos_9900_numports(dev);
+ break;
+
+ default:
+ if (num_serial == 0 ) {
+ moan_device("unknown NetMos/Mostech device", dev);
+ }
+ }
+
if (num_serial == 0)
return -ENODEV;
+
return num_serial;
}
@@ -1396,6 +1494,7 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
.device = PCI_DEVICE_ID_TIMEDIA_1889,
.subvendor = PCI_VENDOR_ID_TIMEDIA,
.subdevice = PCI_ANY_ID,
+ .probe = pci_timedia_probe,
.init = pci_timedia_init,
.setup = pci_timedia_setup,
},
@@ -1426,7 +1525,7 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = {
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
.init = pci_netmos_init,
- .setup = pci_default_setup,
+ .setup = pci_netmos_9900_setup,
},
/*
* For Oxford Semiconductor Tornado based devices
@@ -1703,6 +1802,7 @@ enum pci_board_num_t {
pbn_ADDIDATA_PCIe_8_3906250,
pbn_ce4100_1_115200,
pbn_omegapci,
+ pbn_NETMOS9900_2s_115200,
};
/*
@@ -2404,6 +2504,11 @@ static struct pciserial_board pci_boards[] __devinitdata = {
.base_baud = 115200,
.uart_offset = 0x200,
},
+ [pbn_NETMOS9900_2s_115200] = {
+ .flags = FL_BASE0,
+ .num_ports = 2,
+ .base_baud = 115200,
+ },
};
static const struct pci_device_id softmodem_blacklist[] = {
@@ -2640,11 +2745,19 @@ EXPORT_SYMBOL_GPL(pciserial_resume_ports);
static int __devinit
pciserial_init_one(struct pci_dev *dev, const struct pci_device_id *ent)
{
+ struct pci_serial_quirk *quirk;
struct serial_private *priv;
const struct pciserial_board *board;
struct pciserial_board tmp;
int rc;
+ quirk = find_quirk(dev);
+ if (quirk->probe) {
+ rc = quirk->probe(dev);
+ if (rc)
+ return rc;
+ }
+
if (ent->driver_data >= ARRAY_SIZE(pci_boards)) {
printk(KERN_ERR "pci_init_one: invalid driver_data: %ld\n",
ent->driver_data);
@@ -2654,6 +2767,7 @@ pciserial_init_one(struct pci_dev *dev, const struct pci_device_id *ent)
board = &pci_boards[ent->driver_data];
rc = pci_enable_device(dev);
+ pci_save_state(dev);
if (rc)
return rc;
@@ -3885,6 +3999,27 @@ static struct pci_device_id serial_pci_tbl[] = {
0xA000, 0x1000,
0, 0, pbn_b0_1_115200 },
+ /* the 9901 is a rebranded 9912 */
+ { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9912,
+ 0xA000, 0x1000,
+ 0, 0, pbn_b0_1_115200 },
+
+ { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9922,
+ 0xA000, 0x1000,
+ 0, 0, pbn_b0_1_115200 },
+
+ { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9904,
+ 0xA000, 0x1000,
+ 0, 0, pbn_b0_1_115200 },
+
+ { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9900,
+ 0xA000, 0x1000,
+ 0, 0, pbn_b0_1_115200 },
+
+ { PCI_VENDOR_ID_NETMOS, PCI_DEVICE_ID_NETMOS_9900,
+ 0xA000, 0x3002,
+ 0, 0, pbn_NETMOS9900_2s_115200 },
+
/*
* Best Connectivity PCI Multi I/O cards
*/
@@ -3927,6 +4062,51 @@ static struct pci_device_id serial_pci_tbl[] = {
{ 0, }
};
+static pci_ers_result_t serial8250_io_error_detected(struct pci_dev *dev,
+ pci_channel_state_t state)
+{
+ struct serial_private *priv = pci_get_drvdata(dev);
+
+ if (state == pci_channel_io_perm_failure)
+ return PCI_ERS_RESULT_DISCONNECT;
+
+ if (priv)
+ pciserial_suspend_ports(priv);
+
+ pci_disable_device(dev);
+
+ return PCI_ERS_RESULT_NEED_RESET;
+}
+
+static pci_ers_result_t serial8250_io_slot_reset(struct pci_dev *dev)
+{
+ int rc;
+
+ rc = pci_enable_device(dev);
+
+ if (rc)
+ return PCI_ERS_RESULT_DISCONNECT;
+
+ pci_restore_state(dev);
+ pci_save_state(dev);
+
+ return PCI_ERS_RESULT_RECOVERED;
+}
+
+static void serial8250_io_resume(struct pci_dev *dev)
+{
+ struct serial_private *priv = pci_get_drvdata(dev);
+
+ if (priv)
+ pciserial_resume_ports(priv);
+}
+
+static struct pci_error_handlers serial8250_err_handler = {
+ .error_detected = serial8250_io_error_detected,
+ .slot_reset = serial8250_io_slot_reset,
+ .resume = serial8250_io_resume,
+};
+
static struct pci_driver serial_pci_driver = {
.name = "serial",
.probe = pciserial_init_one,
@@ -3936,6 +4116,7 @@ static struct pci_driver serial_pci_driver = {
.resume = pciserial_resume_one,
#endif
.id_table = serial_pci_tbl,
+ .err_handler = &serial8250_err_handler,
};
static int __init serial8250_pci_init(void)
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 8f41e112346..cb40b82daf3 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -1404,7 +1404,7 @@ config SERIAL_SC26XX
config SERIAL_SC26XX_CONSOLE
bool "Console on SC2681/SC2692 serial port"
- depends on SERIAL_SC26XX
+ depends on SERIAL_SC26XX=y
select SERIAL_CORE_CONSOLE
help
Support for Console on SC2681/SC2692 serial ports.
diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c
index 46521093089..846dfcd3ce0 100644
--- a/drivers/tty/serial/pch_uart.c
+++ b/drivers/tty/serial/pch_uart.c
@@ -14,6 +14,7 @@
*along with this program; if not, write to the Free Software
*Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*/
+#include <linux/kernel.h>
#include <linux/serial_reg.h>
#include <linux/slab.h>
#include <linux/module.h>
@@ -44,6 +45,7 @@ enum {
/* Set the max number of UART port
* Intel EG20T PCH: 4 port
* OKI SEMICONDUCTOR ML7213 IOH: 3 port
+ * OKI SEMICONDUCTOR ML7223 IOH: 2 port
*/
#define PCH_UART_NR 4
@@ -137,8 +139,6 @@ enum {
#define PCH_UART_DLL 0x00
#define PCH_UART_DLM 0x01
-#define DIV_ROUND(a, b) (((a) + ((b)/2)) / (b))
-
#define PCH_UART_IID_RLS (PCH_UART_IIR_REI)
#define PCH_UART_IID_RDR (PCH_UART_IIR_RRI)
#define PCH_UART_IID_RDR_TO (PCH_UART_IIR_RRI | PCH_UART_IIR_TOI)
@@ -316,7 +316,7 @@ static int pch_uart_hal_set_line(struct eg20t_port *priv, int baud,
unsigned int dll, dlm, lcr;
int div;
- div = DIV_ROUND(priv->base_baud / 16, baud);
+ div = DIV_ROUND_CLOSEST(priv->base_baud / 16, baud);
if (div < 0 || USHRT_MAX <= div) {
dev_err(priv->port.dev, "Invalid Baud(div=0x%x)\n", div);
return -EINVAL;
@@ -1429,6 +1429,8 @@ static struct eg20t_port *pch_uart_init_port(struct pci_dev *pdev,
goto init_port_hal_free;
}
+ pci_enable_msi(pdev);
+
iobase = pci_resource_start(pdev, 0);
mapbase = pci_resource_start(pdev, 1);
priv->mapbase = mapbase;
@@ -1485,6 +1487,8 @@ static void pch_uart_pci_remove(struct pci_dev *pdev)
struct eg20t_port *priv;
priv = (struct eg20t_port *)pci_get_drvdata(pdev);
+
+ pci_disable_msi(pdev);
pch_uart_exit_port(priv);
pci_disable_device(pdev);
kfree(priv);
@@ -1568,6 +1572,7 @@ static int __devinit pch_uart_pci_probe(struct pci_dev *pdev,
return ret;
probe_disable_device:
+ pci_disable_msi(pdev);
pci_disable_device(pdev);
probe_error:
return ret;
diff --git a/drivers/tty/serial/s5pv210.c b/drivers/tty/serial/s5pv210.c
index 8dd160c96e8..8b0b888a1b7 100644
--- a/drivers/tty/serial/s5pv210.c
+++ b/drivers/tty/serial/s5pv210.c
@@ -18,6 +18,7 @@
#include <linux/init.h>
#include <linux/serial_core.h>
#include <linux/serial.h>
+#include <linux/delay.h>
#include <asm/irq.h>
#include <mach/hardware.h>
@@ -83,6 +84,9 @@ static int s5pv210_serial_resetport(struct uart_port *port,
wr_regl(port, S3C2410_UFCON, cfg->ufcon | S3C2410_UFCON_RESETBOTH);
wr_regl(port, S3C2410_UFCON, cfg->ufcon);
+ /* It is need to delay When reset FIFO register */
+ udelay(1);
+
return 0;
}
diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c
index 7ead42104c6..afc62942315 100644
--- a/drivers/tty/serial/samsung.c
+++ b/drivers/tty/serial/samsung.c
@@ -1194,12 +1194,10 @@ int __devexit s3c24xx_serial_remove(struct platform_device *dev)
EXPORT_SYMBOL_GPL(s3c24xx_serial_remove);
/* UART power management code */
-
-#ifdef CONFIG_PM
-
-static int s3c24xx_serial_suspend(struct platform_device *dev, pm_message_t state)
+#ifdef CONFIG_PM_SLEEP
+static int s3c24xx_serial_suspend(struct device *dev)
{
- struct uart_port *port = s3c24xx_dev_to_port(&dev->dev);
+ struct uart_port *port = s3c24xx_dev_to_port(dev);
if (port)
uart_suspend_port(&s3c24xx_uart_drv, port);
@@ -1207,9 +1205,9 @@ static int s3c24xx_serial_suspend(struct platform_device *dev, pm_message_t stat
return 0;
}
-static int s3c24xx_serial_resume(struct platform_device *dev)
+static int s3c24xx_serial_resume(struct device *dev)
{
- struct uart_port *port = s3c24xx_dev_to_port(&dev->dev);
+ struct uart_port *port = s3c24xx_dev_to_port(dev);
struct s3c24xx_uart_port *ourport = to_ourport(port);
if (port) {
@@ -1222,17 +1220,20 @@ static int s3c24xx_serial_resume(struct platform_device *dev)
return 0;
}
-#endif
+
+static const struct dev_pm_ops s3c24xx_serial_pm_ops = {
+ .suspend = s3c24xx_serial_suspend,
+ .resume = s3c24xx_serial_resume,
+};
+#else /* !CONFIG_PM_SLEEP */
+#define s3c24xx_serial_pm_ops NULL
+#endif /* CONFIG_PM_SLEEP */
int s3c24xx_serial_init(struct platform_driver *drv,
struct s3c24xx_uart_info *info)
{
dbg("s3c24xx_serial_init(%p,%p)\n", drv, info);
-
-#ifdef CONFIG_PM
- drv->suspend = s3c24xx_serial_suspend;
- drv->resume = s3c24xx_serial_resume;
-#endif
+ drv->driver.pm = &s3c24xx_serial_pm_ops;
return platform_driver_register(drv);
}
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 6556f7452ba..150e4f747c7 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -94,6 +94,7 @@
#include <linux/delay.h>
#include <linux/seq_file.h>
#include <linux/serial.h>
+#include <linux/ratelimit.h>
#include <linux/uaccess.h>
#include <asm/system.h>
@@ -1420,8 +1421,7 @@ err_module_put:
/* call the tty release_tty routine to clean out this slot */
err_release_tty:
- if (printk_ratelimit())
- printk(KERN_INFO "tty_init_dev: ldisc open failed, "
+ printk_ratelimited(KERN_INFO "tty_init_dev: ldisc open failed, "
"clearing slot %d\n", idx);
release_tty(tty, idx);
return ERR_PTR(retval);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-28 06:33:11 +0000