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-rw-r--r--drivers/tty/n_gsm.c140
-rw-r--r--drivers/tty/n_hdlc.c558
-rw-r--r--drivers/tty/n_tty.c6
-rw-r--r--drivers/tty/serial/8250/8250_bcm2835aux.c18
-rw-r--r--drivers/tty/serial/8250/8250_exar.c2
-rw-r--r--drivers/tty/serial/8250/8250_of.c28
-rw-r--r--drivers/tty/serial/8250/8250_pci.c2
-rw-r--r--drivers/tty/serial/8250/8250_port.c31
-rw-r--r--drivers/tty/serial/8250/8250_pxa.c2
-rw-r--r--drivers/tty/serial/8250/8250_tegra.c198
-rw-r--r--drivers/tty/serial/8250/Kconfig9
-rw-r--r--drivers/tty/serial/8250/Makefile1
-rw-r--r--drivers/tty/serial/Kconfig12
-rw-r--r--drivers/tty/serial/efm32-uart.c2
-rw-r--r--drivers/tty/serial/kgdboc.c4
-rw-r--r--drivers/tty/serial/sc16is7xx.c2
-rw-r--r--drivers/tty/serial/serial_core.c96
-rw-r--r--drivers/tty/vt/selection.c5
-rw-r--r--drivers/tty/vt/vt.c7
-rw-r--r--drivers/tty/vt/vt_ioctl.c29
20 files changed, 606 insertions, 546 deletions
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index f1c90fa2978e..d77ed82a4840 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -97,7 +97,19 @@ struct gsm_msg {
u8 ctrl; /* Control byte + flags */
unsigned int len; /* Length of data block (can be zero) */
unsigned char *data; /* Points into buffer but not at the start */
- unsigned char buffer[0];
+ unsigned char buffer[];
+};
+
+enum gsm_dlci_state {
+ DLCI_CLOSED,
+ DLCI_OPENING, /* Sending SABM not seen UA */
+ DLCI_OPEN, /* SABM/UA complete */
+ DLCI_CLOSING, /* Sending DISC not seen UA/DM */
+};
+
+enum gsm_dlci_mode {
+ DLCI_MODE_ABM, /* Normal Asynchronous Balanced Mode */
+ DLCI_MODE_ADM, /* Asynchronous Disconnected Mode */
};
/*
@@ -113,32 +125,25 @@ struct gsm_msg {
struct gsm_dlci {
struct gsm_mux *gsm;
int addr;
- int state;
-#define DLCI_CLOSED 0
-#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 */
+ enum gsm_dlci_state state;
struct mutex mutex;
/* Link layer */
- int mode;
-#define DLCI_MODE_ABM 0 /* Normal Asynchronous Balanced Mode */
-#define DLCI_MODE_ADM 1 /* Asynchronous Disconnected Mode */
+ enum gsm_dlci_mode mode;
spinlock_t lock; /* Protects the internal state */
struct timer_list t1; /* Retransmit timer for SABM and UA */
int retries;
/* Uplink tty if active */
struct tty_port port; /* The tty bound to this DLCI if there is one */
- struct kfifo *fifo; /* Queue fifo for the DLCI */
- struct kfifo _fifo; /* For new fifo API porting only */
+ struct kfifo fifo; /* Queue fifo for the DLCI */
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 */
+ bool dead; /* Refuse re-open */
/* Flow control */
- int throttled; /* Private copy of throttle state */
- int constipated; /* Throttle status for outgoing */
+ bool throttled; /* Private copy of throttle state */
+ bool constipated; /* Throttle status for outgoing */
/* Packetised I/O */
struct sk_buff *skb; /* Frame being sent */
struct sk_buff_head skb_list; /* Queued frames */
@@ -168,6 +173,20 @@ struct gsm_control {
int error; /* Error if any */
};
+enum gsm_mux_state {
+ GSM_SEARCH,
+ GSM_START,
+ GSM_ADDRESS,
+ GSM_CONTROL,
+ GSM_LEN,
+ GSM_DATA,
+ GSM_FCS,
+ GSM_OVERRUN,
+ GSM_LEN0,
+ GSM_LEN1,
+ GSM_SSOF,
+};
+
/*
* Each GSM mux we have is represented by this structure. If we are
* operating as an ldisc then we use this structure as our ldisc
@@ -192,22 +211,11 @@ struct gsm_mux {
/* Framing Layer */
unsigned char *buf;
- int state;
-#define GSM_SEARCH 0
-#define GSM_START 1
-#define GSM_ADDRESS 2
-#define GSM_CONTROL 3
-#define GSM_LEN 4
-#define GSM_DATA 5
-#define GSM_FCS 6
-#define GSM_OVERRUN 7
-#define GSM_LEN0 8
-#define GSM_LEN1 9
-#define GSM_SSOF 10
+ enum gsm_mux_state state;
unsigned int len;
unsigned int address;
unsigned int count;
- int escape;
+ bool escape;
int encoding;
u8 control;
u8 fcs;
@@ -224,9 +232,9 @@ struct gsm_mux {
unsigned int mru;
unsigned int mtu;
int initiator; /* Did we initiate connection */
- int dead; /* Has the mux been shut down */
+ bool dead; /* Has the mux been shut down */
struct gsm_dlci *dlci[NUM_DLCI];
- int constipated; /* Asked by remote to shut up */
+ bool constipated; /* Asked by remote to shut up */
spinlock_t tx_lock;
unsigned int tx_bytes; /* TX data outstanding */
@@ -796,7 +804,7 @@ static int gsm_dlci_data_output(struct gsm_mux *gsm, struct gsm_dlci *dlci)
total_size = 0;
while (1) {
- len = kfifo_len(dlci->fifo);
+ len = kfifo_len(&dlci->fifo);
if (len == 0)
return total_size;
@@ -820,7 +828,7 @@ static int gsm_dlci_data_output(struct gsm_mux *gsm, struct gsm_dlci *dlci)
*dp++ = gsm_encode_modem(dlci);
break;
}
- WARN_ON(kfifo_out_locked(dlci->fifo, dp , len, &dlci->lock) != len);
+ WARN_ON(kfifo_out_locked(&dlci->fifo, dp , len, &dlci->lock) != len);
__gsm_data_queue(dlci, msg);
total_size += size;
}
@@ -1034,9 +1042,9 @@ static void gsm_process_modem(struct tty_struct *tty, struct gsm_dlci *dlci,
fc = (modem & MDM_FC) || !(modem & MDM_RTR);
if (fc && !dlci->constipated) {
/* Need to throttle our output on this device */
- dlci->constipated = 1;
+ dlci->constipated = true;
} else if (!fc && dlci->constipated) {
- dlci->constipated = 0;
+ dlci->constipated = false;
gsm_dlci_data_kick(dlci);
}
@@ -1199,8 +1207,8 @@ static void gsm_control_message(struct gsm_mux *gsm, unsigned int command,
struct gsm_dlci *dlci = gsm->dlci[0];
/* Modem wishes to close down */
if (dlci) {
- dlci->dead = 1;
- gsm->dead = 1;
+ dlci->dead = true;
+ gsm->dead = true;
gsm_dlci_begin_close(dlci);
}
}
@@ -1211,7 +1219,7 @@ static void gsm_control_message(struct gsm_mux *gsm, unsigned int command,
break;
case CMD_FCON:
/* Modem can accept data again */
- gsm->constipated = 0;
+ gsm->constipated = false;
gsm_control_reply(gsm, CMD_FCON, NULL, 0);
/* Kick the link in case it is idling */
spin_lock_irqsave(&gsm->tx_lock, flags);
@@ -1220,7 +1228,7 @@ static void gsm_control_message(struct gsm_mux *gsm, unsigned int command,
break;
case CMD_FCOFF:
/* Modem wants us to STFU */
- gsm->constipated = 1;
+ gsm->constipated = true;
gsm_control_reply(gsm, CMD_FCOFF, NULL, 0);
break;
case CMD_MSC:
@@ -1424,9 +1432,9 @@ static void gsm_dlci_close(struct gsm_dlci *dlci)
dlci->state = DLCI_CLOSED;
if (dlci->addr != 0) {
tty_port_tty_hangup(&dlci->port, false);
- kfifo_reset(dlci->fifo);
+ kfifo_reset(&dlci->fifo);
} else
- dlci->gsm->dead = 1;
+ dlci->gsm->dead = true;
wake_up(&dlci->gsm->event);
/* A DLCI 0 close is a MUX termination so we need to kick that
back to userspace somehow */
@@ -1496,6 +1504,9 @@ static void gsm_dlci_t1(struct timer_list *t)
} else
gsm_dlci_close(dlci);
break;
+ default:
+ pr_debug("%s: unhandled state: %d\n", __func__, dlci->state);
+ break;
}
}
@@ -1645,8 +1656,7 @@ static struct gsm_dlci *gsm_dlci_alloc(struct gsm_mux *gsm, int addr)
return NULL;
spin_lock_init(&dlci->lock);
mutex_init(&dlci->mutex);
- dlci->fifo = &dlci->_fifo;
- if (kfifo_alloc(&dlci->_fifo, 4096, GFP_KERNEL) < 0) {
+ if (kfifo_alloc(&dlci->fifo, 4096, GFP_KERNEL) < 0) {
kfree(dlci);
return NULL;
}
@@ -1681,7 +1691,7 @@ static void gsm_dlci_free(struct tty_port *port)
del_timer_sync(&dlci->t1);
dlci->gsm->dlci[dlci->addr] = NULL;
- kfifo_free(dlci->fifo);
+ kfifo_free(&dlci->fifo);
while ((dlci->skb = skb_dequeue(&dlci->skb_list)))
dev_kfree_skb(dlci->skb);
kfree(dlci);
@@ -1810,6 +1820,10 @@ static void gsm_queue(struct gsm_mux *gsm)
case DLCI_OPENING:
gsm_dlci_open(dlci);
break;
+ default:
+ pr_debug("%s: unhandled state: %d\n", __func__,
+ dlci->state);
+ break;
}
break;
case DM: /* DM can be valid unsolicited */
@@ -1923,6 +1937,9 @@ static void gsm0_receive(struct gsm_mux *gsm, unsigned char c)
break;
}
break;
+ default:
+ pr_debug("%s: unhandled state: %d\n", __func__, gsm->state);
+ break;
}
}
@@ -1959,7 +1976,7 @@ static void gsm1_receive(struct gsm_mux *gsm, unsigned char c)
}
if (c == GSM1_ESCAPE) {
- gsm->escape = 1;
+ gsm->escape = true;
return;
}
@@ -1969,7 +1986,7 @@ static void gsm1_receive(struct gsm_mux *gsm, unsigned char c)
if (gsm->escape) {
c ^= GSM1_ESCAPE_BITS;
- gsm->escape = 0;
+ gsm->escape = false;
}
switch (gsm->state) {
case GSM_START: /* First byte after SOF */
@@ -1997,6 +2014,9 @@ static void gsm1_receive(struct gsm_mux *gsm, unsigned char c)
break;
case GSM_OVERRUN: /* Over-long - eg a dropped SOF */
break;
+ default:
+ pr_debug("%s: unhandled state: %d\n", __func__, gsm->state);
+ break;
}
}
@@ -2061,7 +2081,7 @@ static void gsm_cleanup_mux(struct gsm_mux *gsm)
struct gsm_dlci *dlci = gsm->dlci[0];
struct gsm_msg *txq, *ntxq;
- gsm->dead = 1;
+ gsm->dead = true;
spin_lock(&gsm_mux_lock);
for (i = 0; i < MAX_MUX; i++) {
@@ -2078,7 +2098,7 @@ static void gsm_cleanup_mux(struct gsm_mux *gsm)
del_timer_sync(&gsm->t2_timer);
/* Now we are sure T2 has stopped */
if (dlci)
- dlci->dead = 1;
+ dlci->dead = true;
/* Free up any link layer users */
mutex_lock(&gsm->mutex);
@@ -2132,7 +2152,7 @@ static int gsm_activate_mux(struct gsm_mux *gsm)
dlci = gsm_dlci_alloc(gsm, 0);
if (dlci == NULL)
return -ENOMEM;
- gsm->dead = 0; /* Tty opens are now permissible */
+ gsm->dead = false; /* Tty opens are now permissible */
return 0;
}
@@ -2216,7 +2236,7 @@ static struct gsm_mux *gsm_alloc_mux(void)
gsm->encoding = 1;
gsm->mru = 64; /* Default to encoding 1 so these should be 64 */
gsm->mtu = 64;
- gsm->dead = 1; /* Avoid early tty opens */
+ gsm->dead = true; /* Avoid early tty opens */
return gsm;
}
@@ -2618,11 +2638,11 @@ static int gsmld_ioctl(struct tty_struct *tty, struct file *file,
switch (cmd) {
case GSMIOC_GETCONF:
gsm_copy_config_values(gsm, &c);
- if (copy_to_user((void *)arg, &c, sizeof(c)))
+ if (copy_to_user((void __user *)arg, &c, sizeof(c)))
return -EFAULT;
return 0;
case GSMIOC_SETCONF:
- if (copy_from_user(&c, (void *)arg, sizeof(c)))
+ if (copy_from_user(&c, (void __user *)arg, sizeof(c)))
return -EFAULT;
return gsm_config(gsm, &c);
case GSMIOC_GETFIRST:
@@ -2769,7 +2789,7 @@ static void gsm_destroy_network(struct gsm_dlci *dlci)
{
struct gsm_mux_net *mux_net;
- pr_debug("destroy network interface");
+ pr_debug("destroy network interface\n");
if (!dlci->net)
return;
mux_net = netdev_priv(dlci->net);
@@ -2798,7 +2818,7 @@ static int gsm_create_network(struct gsm_dlci *dlci, struct gsm_netconfig *nc)
if (nc->adaption != 3 && nc->adaption != 4)
return -EPROTONOSUPPORT;
- pr_debug("create network interface");
+ pr_debug("create network interface\n");
netname = "gsm%d";
if (nc->if_name[0] != '\0')
@@ -2806,7 +2826,7 @@ static int gsm_create_network(struct gsm_dlci *dlci, struct gsm_netconfig *nc)
net = alloc_netdev(sizeof(struct gsm_mux_net), netname,
NET_NAME_UNKNOWN, gsm_mux_net_init);
if (!net) {
- pr_err("alloc_netdev failed");
+ pr_err("alloc_netdev failed\n");
return -ENOMEM;
}
net->mtu = dlci->gsm->mtu;
@@ -2824,7 +2844,7 @@ static int gsm_create_network(struct gsm_dlci *dlci, struct gsm_netconfig *nc)
dlci->data = gsm_mux_rx_netchar;
dlci->net = net;
- pr_debug("register netdev");
+ pr_debug("register netdev\n");
retval = register_netdev(net);
if (retval) {
pr_err("network register fail %d\n", retval);
@@ -3030,7 +3050,7 @@ static int gsmtty_write(struct tty_struct *tty, const unsigned char *buf,
if (dlci->state == DLCI_CLOSED)
return -EINVAL;
/* Stuff the bytes into the fifo queue */
- sent = kfifo_in_locked(dlci->fifo, buf, len, &dlci->lock);
+ sent = kfifo_in_locked(&dlci->fifo, buf, len, &dlci->lock);
/* Need to kick the channel */
gsm_dlci_data_kick(dlci);
return sent;
@@ -3041,7 +3061,7 @@ static int gsmtty_write_room(struct tty_struct *tty)
struct gsm_dlci *dlci = tty->driver_data;
if (dlci->state == DLCI_CLOSED)
return -EINVAL;
- return TX_SIZE - kfifo_len(dlci->fifo);
+ return TX_SIZE - kfifo_len(&dlci->fifo);
}
static int gsmtty_chars_in_buffer(struct tty_struct *tty)
@@ -3049,7 +3069,7 @@ static int gsmtty_chars_in_buffer(struct tty_struct *tty)
struct gsm_dlci *dlci = tty->driver_data;
if (dlci->state == DLCI_CLOSED)
return -EINVAL;
- return kfifo_len(dlci->fifo);
+ return kfifo_len(&dlci->fifo);
}
static void gsmtty_flush_buffer(struct tty_struct *tty)
@@ -3061,7 +3081,7 @@ static void gsmtty_flush_buffer(struct tty_struct *tty)
then the data being transmitted can't simply be junked once
it has first hit the stack. Until then we can just blow it
away */
- kfifo_reset(dlci->fifo);
+ kfifo_reset(&dlci->fifo);
/* Need to unhook this DLCI from the transmit queue logic */
}
@@ -3152,7 +3172,7 @@ static void gsmtty_throttle(struct tty_struct *tty)
return;
if (C_CRTSCTS(tty))
dlci->modem_tx &= ~TIOCM_DTR;
- dlci->throttled = 1;
+ dlci->throttled = true;
/* Send an MSC with DTR cleared */
gsmtty_modem_update(dlci, 0);
}
@@ -3164,7 +3184,7 @@ static void gsmtty_unthrottle(struct tty_struct *tty)
return;
if (C_CRTSCTS(tty))
dlci->modem_tx |= TIOCM_DTR;
- dlci->throttled = 0;
+ dlci->throttled = false;
/* Send an MSC with DTR set */
gsmtty_modem_update(dlci, 0);
}
diff --git a/drivers/tty/n_hdlc.c b/drivers/tty/n_hdlc.c
index 27b506bf03ce..cd1319d26c45 100644
--- a/drivers/tty/n_hdlc.c
+++ b/drivers/tty/n_hdlc.c
@@ -18,7 +18,7 @@
* All HDLC data is frame oriented which means:
*
* 1. tty write calls represent one complete transmit frame of data
- * The device driver should accept the complete frame or none of
+ * The device driver should accept the complete frame or none of
* the frame (busy) in the write method. Each write call should have
* a byte count in the range of 2-65535 bytes (2 is min HDLC frame
* with 1 addr byte and 1 ctrl byte). The max byte count of 65535
@@ -39,7 +39,7 @@
* tty read calls.
*
* 3. tty read calls returns an entire frame of data or nothing.
- *
+ *
* 4. all send and receive data is considered raw. No processing
* or translation is performed by the line discipline, regardless
* of the tty flags
@@ -87,9 +87,6 @@
#include <linux/interrupt.h>
#include <linux/ptrace.h>
-#undef VERSION
-#define VERSION(major,minor,patch) (((((major)<<8)+(minor))<<8)+(patch))
-
#include <linux/poll.h>
#include <linux/in.h>
#include <linux/ioctl.h>
@@ -107,7 +104,7 @@
/*
* Buffers for individual HDLC frames
*/
-#define MAX_HDLC_FRAME_SIZE 65535
+#define MAX_HDLC_FRAME_SIZE 65535
#define DEFAULT_RX_BUF_COUNT 10
#define MAX_RX_BUF_COUNT 60
#define DEFAULT_TX_BUF_COUNT 3
@@ -127,11 +124,8 @@ struct n_hdlc_buf_list {
/**
* struct n_hdlc - per device instance data structure
* @magic - magic value for structure
- * @flags - miscellaneous control flags
- * @tty - ptr to TTY structure
- * @backup_tty - TTY to use if tty gets closed
* @tbusy - reentrancy flag for tx wakeup code
- * @woke_up - FIXME: describe this field
+ * @woke_up - tx wakeup needs to be run again as it was called while @tbusy
* @tx_buf_list - list of pending transmit frame buffers
* @rx_buf_list - list of received frame buffers
* @tx_free_buf_list - list unused transmit frame buffers
@@ -139,11 +133,8 @@ struct n_hdlc_buf_list {
*/
struct n_hdlc {
int magic;
- __u32 flags;
- struct tty_struct *tty;
- struct tty_struct *backup_tty;
- int tbusy;
- int woke_up;
+ bool tbusy;
+ bool woke_up;
struct n_hdlc_buf_list tx_buf_list;
struct n_hdlc_buf_list rx_buf_list;
struct n_hdlc_buf_list tx_free_buf_list;
@@ -161,39 +152,14 @@ static struct n_hdlc_buf *n_hdlc_buf_get(struct n_hdlc_buf_list *list);
/* Local functions */
-static struct n_hdlc *n_hdlc_alloc (void);
-
-/* debug level can be set by insmod for debugging purposes */
-#define DEBUG_LEVEL_INFO 1
-static int debuglevel;
+static struct n_hdlc *n_hdlc_alloc(void);
/* max frame size for memory allocations */
static int maxframe = 4096;
-/* TTY callbacks */
-
-static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file,
- __u8 __user *buf, size_t nr);
-static ssize_t n_hdlc_tty_write(struct tty_struct *tty, struct file *file,
- const unsigned char *buf, size_t nr);
-static int n_hdlc_tty_ioctl(struct tty_struct *tty, struct file *file,
- unsigned int cmd, unsigned long arg);
-static __poll_t n_hdlc_tty_poll(struct tty_struct *tty, struct file *filp,
- poll_table *wait);
-static int n_hdlc_tty_open(struct tty_struct *tty);
-static void n_hdlc_tty_close(struct tty_struct *tty);
-static void n_hdlc_tty_receive(struct tty_struct *tty, const __u8 *cp,
- char *fp, int count);
-static void n_hdlc_tty_wakeup(struct tty_struct *tty);
-
-#define bset(p,b) ((p)[(b) >> 5] |= (1 << ((b) & 0x1f)))
-
-#define tty2n_hdlc(tty) ((struct n_hdlc *) ((tty)->disc_data))
-#define n_hdlc2tty(n_hdlc) ((n_hdlc)->tty)
-
static void flush_rx_queue(struct tty_struct *tty)
{
- struct n_hdlc *n_hdlc = tty2n_hdlc(tty);
+ struct n_hdlc *n_hdlc = tty->disc_data;
struct n_hdlc_buf *buf;
while ((buf = n_hdlc_buf_get(&n_hdlc->rx_buf_list)))
@@ -202,79 +168,22 @@ static void flush_rx_queue(struct tty_struct *tty)
static void flush_tx_queue(struct tty_struct *tty)
{
- struct n_hdlc *n_hdlc = tty2n_hdlc(tty);
+ struct n_hdlc *n_hdlc = tty->disc_data;
struct n_hdlc_buf *buf;
while ((buf = n_hdlc_buf_get(&n_hdlc->tx_buf_list)))
n_hdlc_buf_put(&n_hdlc->tx_free_buf_list, buf);
}
-static struct tty_ldisc_ops n_hdlc_ldisc = {
- .owner = THIS_MODULE,
- .magic = TTY_LDISC_MAGIC,
- .name = "hdlc",
- .open = n_hdlc_tty_open,
- .close = n_hdlc_tty_close,
- .read = n_hdlc_tty_read,
- .write = n_hdlc_tty_write,
- .ioctl = n_hdlc_tty_ioctl,
- .poll = n_hdlc_tty_poll,
- .receive_buf = n_hdlc_tty_receive,
- .write_wakeup = n_hdlc_tty_wakeup,
- .flush_buffer = flush_rx_queue,
-};
-
-/**
- * n_hdlc_release - release an n_hdlc per device line discipline info structure
- * @n_hdlc - per device line discipline info structure
- */
-static void n_hdlc_release(struct n_hdlc *n_hdlc)
+static void n_hdlc_free_buf_list(struct n_hdlc_buf_list *list)
{
- struct tty_struct *tty = n_hdlc2tty (n_hdlc);
struct n_hdlc_buf *buf;
-
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_release() called\n",__FILE__,__LINE__);
-
- /* Ensure that the n_hdlcd process is not hanging on select()/poll() */
- wake_up_interruptible (&tty->read_wait);
- wake_up_interruptible (&tty->write_wait);
-
- if (tty->disc_data == n_hdlc)
- tty->disc_data = NULL; /* Break the tty->n_hdlc link */
-
- /* Release transmit and receive buffers */
- for(;;) {
- buf = n_hdlc_buf_get(&n_hdlc->rx_free_buf_list);
- if (buf) {
- kfree(buf);
- } else
- break;
- }
- for(;;) {
- buf = n_hdlc_buf_get(&n_hdlc->tx_free_buf_list);
- if (buf) {
- kfree(buf);
- } else
- break;
- }
- for(;;) {
- buf = n_hdlc_buf_get(&n_hdlc->rx_buf_list);
- if (buf) {
- kfree(buf);
- } else
- break;
- }
- for(;;) {
- buf = n_hdlc_buf_get(&n_hdlc->tx_buf_list);
- if (buf) {
- kfree(buf);
- } else
- break;
- }
- kfree(n_hdlc);
-
-} /* end of n_hdlc_release() */
+
+ do {
+ buf = n_hdlc_buf_get(list);
+ kfree(buf);
+ } while (buf);
+}
/**
* n_hdlc_tty_close - line discipline close
@@ -285,34 +194,26 @@ static void n_hdlc_release(struct n_hdlc *n_hdlc)
*/
static void n_hdlc_tty_close(struct tty_struct *tty)
{
- struct n_hdlc *n_hdlc = tty2n_hdlc (tty);
-
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_tty_close() called\n",__FILE__,__LINE__);
-
- if (n_hdlc != NULL) {
- if (n_hdlc->magic != HDLC_MAGIC) {
- printk (KERN_WARNING"n_hdlc: trying to close unopened tty!\n");
- return;
- }
+ struct n_hdlc *n_hdlc = tty->disc_data;
+
+ if (n_hdlc->magic != HDLC_MAGIC) {
+ pr_warn("n_hdlc: trying to close unopened tty!\n");
+ return;
+ }
#if defined(TTY_NO_WRITE_SPLIT)
- clear_bit(TTY_NO_WRITE_SPLIT,&tty->flags);
+ clear_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
#endif
- tty->disc_data = NULL;
- if (tty == n_hdlc->backup_tty)
- n_hdlc->backup_tty = NULL;
- if (tty != n_hdlc->tty)
- return;
- if (n_hdlc->backup_tty) {
- n_hdlc->tty = n_hdlc->backup_tty;
- } else {
- n_hdlc_release (n_hdlc);
- }
- }
-
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_tty_close() success\n",__FILE__,__LINE__);
-
+ tty->disc_data = NULL;
+
+ /* Ensure that the n_hdlcd process is not hanging on select()/poll() */
+ wake_up_interruptible(&tty->read_wait);
+ wake_up_interruptible(&tty->write_wait);
+
+ n_hdlc_free_buf_list(&n_hdlc->rx_free_buf_list);
+ n_hdlc_free_buf_list(&n_hdlc->tx_free_buf_list);
+ n_hdlc_free_buf_list(&n_hdlc->rx_buf_list);
+ n_hdlc_free_buf_list(&n_hdlc->tx_buf_list);
+ kfree(n_hdlc);
} /* end of n_hdlc_tty_close() */
/**
@@ -321,44 +222,36 @@ static void n_hdlc_tty_close(struct tty_struct *tty)
*
* Returns 0 if success, otherwise error code
*/
-static int n_hdlc_tty_open (struct tty_struct *tty)
+static int n_hdlc_tty_open(struct tty_struct *tty)
{
- struct n_hdlc *n_hdlc = tty2n_hdlc (tty);
+ struct n_hdlc *n_hdlc = tty->disc_data;
+
+ pr_debug("%s(%d)%s() called (device=%s)\n",
+ __FILE__, __LINE__, __func__, tty->name);
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_tty_open() called (device=%s)\n",
- __FILE__,__LINE__,
- tty->name);
-
/* There should not be an existing table for this slot. */
if (n_hdlc) {
- printk (KERN_ERR"n_hdlc_tty_open:tty already associated!\n" );
+ pr_err("%s: tty already associated!\n", __func__);
return -EEXIST;
}
-
+
n_hdlc = n_hdlc_alloc();
if (!n_hdlc) {
- printk (KERN_ERR "n_hdlc_alloc failed\n");
+ pr_err("%s: n_hdlc_alloc failed\n", __func__);
return -ENFILE;
}
-
+
tty->disc_data = n_hdlc;
- n_hdlc->tty = tty;
tty->receive_room = 65536;
-
-#if defined(TTY_NO_WRITE_SPLIT)
+
/* change tty_io write() to not split large writes into 8K chunks */
- set_bit(TTY_NO_WRITE_SPLIT,&tty->flags);
-#endif
-
+ set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
+
/* flush receive data from driver */
tty_driver_flush_buffer(tty);
-
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_tty_open() success\n",__FILE__,__LINE__);
-
+
return 0;
-
+
} /* end of n_tty_hdlc_open() */
/**
@@ -376,26 +269,23 @@ static void n_hdlc_send_frames(struct n_hdlc *n_hdlc, struct tty_struct *tty)
unsigned long flags;
struct n_hdlc_buf *tbuf;
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_send_frames() called\n",__FILE__,__LINE__);
- check_again:
-
- spin_lock_irqsave(&n_hdlc->tx_buf_list.spinlock, flags);
+check_again:
+
+ spin_lock_irqsave(&n_hdlc->tx_buf_list.spinlock, flags);
if (n_hdlc->tbusy) {
- n_hdlc->woke_up = 1;
- spin_unlock_irqrestore(&n_hdlc->tx_buf_list.spinlock, flags);
+ n_hdlc->woke_up = true;
+ spin_unlock_irqrestore(&n_hdlc->tx_buf_list.spinlock, flags);
return;
}
- n_hdlc->tbusy = 1;
- n_hdlc->woke_up = 0;
+ n_hdlc->tbusy = true;
+ n_hdlc->woke_up = false;
spin_unlock_irqrestore(&n_hdlc->tx_buf_list.spinlock, flags);
tbuf = n_hdlc_buf_get(&n_hdlc->tx_buf_list);
while (tbuf) {
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)sending frame %p, count=%d\n",
- __FILE__,__LINE__,tbuf,tbuf->count);
-
+ pr_debug("%s(%d)sending frame %p, count=%d\n",
+ __FILE__, __LINE__, tbuf, tbuf->count);
+
/* Send the next block of data to device */
set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
actual = tty->ops->write(tty, tbuf->buf, tbuf->count);
@@ -409,24 +299,22 @@ static void n_hdlc_send_frames(struct n_hdlc *n_hdlc, struct tty_struct *tty)
/* pretending it was accepted by driver */
if (actual < 0)
actual = tbuf->count;
-
+
if (actual == tbuf->count) {
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)frame %p completed\n",
- __FILE__,__LINE__,tbuf);
-
+ pr_debug("%s(%d)frame %p completed\n",
+ __FILE__, __LINE__, tbuf);
+
/* free current transmit buffer */
n_hdlc_buf_put(&n_hdlc->tx_free_buf_list, tbuf);
/* wait up sleeping writers */
wake_up_interruptible(&tty->write_wait);
-
+
/* get next pending transmit buffer */
tbuf = n_hdlc_buf_get(&n_hdlc->tx_buf_list);
} else {
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)frame %p pending\n",
- __FILE__,__LINE__,tbuf);
+ pr_debug("%s(%d)frame %p pending\n",
+ __FILE__, __LINE__, tbuf);
/*
* the buffer was not accepted by driver,
@@ -436,21 +324,17 @@ static void n_hdlc_send_frames(struct n_hdlc *n_hdlc, struct tty_struct *tty)
break;
}
}
-
+
if (!tbuf)
clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
-
+
/* Clear the re-entry flag */
spin_lock_irqsave(&n_hdlc->tx_buf_list.spinlock, flags);
- n_hdlc->tbusy = 0;
- spin_unlock_irqrestore(&n_hdlc->tx_buf_list.spinlock, flags);
-
- if (n_hdlc->woke_up)
- goto check_again;
-
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_send_frames() exit\n",__FILE__,__LINE__);
-
+ n_hdlc->tbusy = false;
+ spin_unlock_irqrestore(&n_hdlc->tx_buf_list.spinlock, flags);
+
+ if (n_hdlc->woke_up)
+ goto check_again;
} /* end of n_hdlc_send_frames() */
/**
@@ -461,21 +345,9 @@ static void n_hdlc_send_frames(struct n_hdlc *n_hdlc, struct tty_struct *tty)
*/
static void n_hdlc_tty_wakeup(struct tty_struct *tty)
{
- struct n_hdlc *n_hdlc = tty2n_hdlc(tty);
+ struct n_hdlc *n_hdlc = tty->disc_data;
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_tty_wakeup() called\n",__FILE__,__LINE__);
-
- if (!n_hdlc)
- return;
-
- if (tty != n_hdlc->tty) {
- clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
- return;
- }
-
- n_hdlc_send_frames (n_hdlc, tty);
-
+ n_hdlc_send_frames(n_hdlc, tty);
} /* end of n_hdlc_tty_wakeup() */
/**
@@ -491,59 +363,54 @@ static void n_hdlc_tty_wakeup(struct tty_struct *tty)
static void n_hdlc_tty_receive(struct tty_struct *tty, const __u8 *data,
char *flags, int count)
{
- register struct n_hdlc *n_hdlc = tty2n_hdlc (tty);
+ register struct n_hdlc *n_hdlc = tty->disc_data;
register struct n_hdlc_buf *buf;
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_tty_receive() called count=%d\n",
- __FILE__,__LINE__, count);
-
- /* This can happen if stuff comes in on the backup tty */
- if (!n_hdlc || tty != n_hdlc->tty)
- return;
-
+ pr_debug("%s(%d)%s() called count=%d\n",
+ __FILE__, __LINE__, __func__, count);
+
/* verify line is using HDLC discipline */
if (n_hdlc->magic != HDLC_MAGIC) {
- printk("%s(%d) line not using HDLC discipline\n",
- __FILE__,__LINE__);
+ pr_err("%s(%d) line not using HDLC discipline\n",
+ __FILE__, __LINE__);
return;
}
-
- if ( count>maxframe ) {
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d) rx count>maxframesize, data discarded\n",
- __FILE__,__LINE__);
+
+ if (count > maxframe) {
+ pr_debug("%s(%d) rx count>maxframesize, data discarded\n",
+ __FILE__, __LINE__);
return;
}
- /* get a free HDLC buffer */
+ /* get a free HDLC buffer */
buf = n_hdlc_buf_get(&n_hdlc->rx_free_buf_list);
if (!buf) {
- /* no buffers in free list, attempt to allocate another rx buffer */
- /* unless the maximum count has been reached */
+ /*
+ * no buffers in free list, attempt to allocate another rx
+ * buffer unless the maximum count has been reached
+ */
if (n_hdlc->rx_buf_list.count < MAX_RX_BUF_COUNT)
buf = kmalloc(struct_size(buf, buf, maxframe),
GFP_ATOMIC);
}
-
+
if (!buf) {
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d) no more rx buffers, data discarded\n",
- __FILE__,__LINE__);
+ pr_debug("%s(%d) no more rx buffers, data discarded\n",
+ __FILE__, __LINE__);
return;
}
-
+
/* copy received data to HDLC buffer */
- memcpy(buf->buf,data,count);
- buf->count=count;
+ memcpy(buf->buf, data, count);
+ buf->count = count;
/* add HDLC buffer to list of received frames */
n_hdlc_buf_put(&n_hdlc->rx_buf_list, buf);
-
+
/* wake up any blocked reads and perform async signalling */
- wake_up_interruptible (&tty->read_wait);
- if (n_hdlc->tty->fasync != NULL)
- kill_fasync (&n_hdlc->tty->fasync, SIGIO, POLL_IN);
+ wake_up_interruptible(&tty->read_wait);
+ if (tty->fasync != NULL)
+ kill_fasync(&tty->fasync, SIGIO, POLL_IN);
} /* end of n_hdlc_tty_receive() */
@@ -553,28 +420,21 @@ static void n_hdlc_tty_receive(struct tty_struct *tty, const __u8 *data,
* @file - pointer to open file object
* @buf - pointer to returned data buffer
* @nr - size of returned data buffer
- *
+ *
* Returns the number of bytes returned or error code.
*/
static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file,
__u8 __user *buf, size_t nr)
{
- struct n_hdlc *n_hdlc = tty2n_hdlc(tty);
+ struct n_hdlc *n_hdlc = tty->disc_data;
int ret = 0;
struct n_hdlc_buf *rbuf;
DECLARE_WAITQUEUE(wait, current);
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_tty_read() called\n",__FILE__,__LINE__);
-
- /* Validate the pointers */
- if (!n_hdlc)
- return -EIO;
-
/* verify user access to buffer */
if (!access_ok(buf, nr)) {
- printk(KERN_WARNING "%s(%d) n_hdlc_tty_read() can't verify user "
- "buffer\n", __FILE__, __LINE__);
+ pr_warn("%s(%d) %s() can't verify user buffer\n",
+ __FILE__, __LINE__, __func__);
return -EFAULT;
}
@@ -610,7 +470,7 @@ static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file,
n_hdlc_buf_put(&n_hdlc->rx_free_buf_list, rbuf);
break;
}
-
+
/* no data */
if (tty_io_nonblock(tty, file)) {
ret = -EAGAIN;
@@ -629,7 +489,7 @@ static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file,
__set_current_state(TASK_RUNNING);
return ret;
-
+
} /* end of n_hdlc_tty_read() */
/**
@@ -638,43 +498,35 @@ static ssize_t n_hdlc_tty_read(struct tty_struct *tty, struct file *file,
* @file - pointer to file object data
* @data - pointer to transmit data (one frame)
* @count - size of transmit frame in bytes
- *
+ *
* Returns the number of bytes written (or error code).
*/
static ssize_t n_hdlc_tty_write(struct tty_struct *tty, struct file *file,
const unsigned char *data, size_t count)
{
- struct n_hdlc *n_hdlc = tty2n_hdlc (tty);
+ struct n_hdlc *n_hdlc = tty->disc_data;
int error = 0;
DECLARE_WAITQUEUE(wait, current);
struct n_hdlc_buf *tbuf;
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_tty_write() called count=%zd\n",
- __FILE__,__LINE__,count);
-
- /* Verify pointers */
- if (!n_hdlc)
- return -EIO;
+ pr_debug("%s(%d)%s() called count=%zd\n", __FILE__, __LINE__, __func__,
+ count);
if (n_hdlc->magic != HDLC_MAGIC)
return -EIO;
/* verify frame size */
- if (count > maxframe ) {
- if (debuglevel & DEBUG_LEVEL_INFO)
- printk (KERN_WARNING
- "n_hdlc_tty_write: truncating user packet "
- "from %lu to %d\n", (unsigned long) count,
- maxframe );
+ if (count > maxframe) {
+ pr_debug("%s: truncating user packet from %zu to %d\n",
+ __func__, count, maxframe);
count = maxframe;
}
-
+
add_wait_queue(&tty->write_wait, &wait);
for (;;) {
set_current_state(TASK_INTERRUPTIBLE);
-
+
tbuf = n_hdlc_buf_get(&n_hdlc->tx_free_buf_list);
if (tbuf)
break;
@@ -684,15 +536,7 @@ static ssize_t n_hdlc_tty_write(struct tty_struct *tty, struct file *file,
break;
}
schedule();
-
- n_hdlc = tty2n_hdlc (tty);
- if (!n_hdlc || n_hdlc->magic != HDLC_MAGIC ||
- tty != n_hdlc->tty) {
- printk("n_hdlc_tty_write: %p invalid after wait!\n", n_hdlc);
- error = -EIO;
- break;
- }
-
+
if (signal_pending(current)) {
error = -EINTR;
break;
@@ -702,18 +546,18 @@ static ssize_t n_hdlc_tty_write(struct tty_struct *tty, struct file *file,
__set_current_state(TASK_RUNNING);
remove_wait_queue(&tty->write_wait, &wait);
- if (!error) {
+ if (!error) {
/* Retrieve the user's buffer */
memcpy(tbuf->buf, data, count);
/* Send the data */
tbuf->count = error = count;
- n_hdlc_buf_put(&n_hdlc->tx_buf_list,tbuf);
- n_hdlc_send_frames(n_hdlc,tty);
+ n_hdlc_buf_put(&n_hdlc->tx_buf_list, tbuf);
+ n_hdlc_send_frames(n_hdlc, tty);
}
return error;
-
+
} /* end of n_hdlc_tty_write() */
/**
@@ -728,32 +572,30 @@ static ssize_t n_hdlc_tty_write(struct tty_struct *tty, struct file *file,
static int n_hdlc_tty_ioctl(struct tty_struct *tty, struct file *file,
unsigned int cmd, unsigned long arg)
{
- struct n_hdlc *n_hdlc = tty2n_hdlc (tty);
+ struct n_hdlc *n_hdlc = tty->disc_data;
int error = 0;
int count;
unsigned long flags;
struct n_hdlc_buf *buf = NULL;
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_tty_ioctl() called %d\n",
- __FILE__,__LINE__,cmd);
-
+ pr_debug("%s(%d)%s() called %d\n", __FILE__, __LINE__, __func__, cmd);
+
/* Verify the status of the device */
- if (!n_hdlc || n_hdlc->magic != HDLC_MAGIC)
+ if (n_hdlc->magic != HDLC_MAGIC)
return -EBADF;
switch (cmd) {
case FIONREAD:
/* report count of read data available */
/* in next available frame (if any) */
- spin_lock_irqsave(&n_hdlc->rx_buf_list.spinlock,flags);
+ spin_lock_irqsave(&n_hdlc->rx_buf_list.spinlock, flags);
buf = list_first_entry_or_null(&n_hdlc->rx_buf_list.list,
struct n_hdlc_buf, list_item);
if (buf)
count = buf->count;
else
count = 0;
- spin_unlock_irqrestore(&n_hdlc->rx_buf_list.spinlock,flags);
+ spin_unlock_irqrestore(&n_hdlc->rx_buf_list.spinlock, flags);
error = put_user(count, (int __user *)arg);
break;
@@ -761,12 +603,12 @@ static int n_hdlc_tty_ioctl(struct tty_struct *tty, struct file *file,
/* get the pending tx byte count in the driver */
count = tty_chars_in_buffer(tty);
/* add size of next output frame in queue */
- spin_lock_irqsave(&n_hdlc->tx_buf_list.spinlock,flags);
+ spin_lock_irqsave(&n_hdlc->tx_buf_list.spinlock, flags);
buf = list_first_entry_or_null(&n_hdlc->tx_buf_list.list,
struct n_hdlc_buf, list_item);
if (buf)
count += buf->count;
- spin_unlock_irqrestore(&n_hdlc->tx_buf_list.spinlock,flags);
+ spin_unlock_irqrestore(&n_hdlc->tx_buf_list.spinlock, flags);
error = put_user(count, (int __user *)arg);
break;
@@ -783,7 +625,7 @@ static int n_hdlc_tty_ioctl(struct tty_struct *tty, struct file *file,
break;
}
return error;
-
+
} /* end of n_hdlc_tty_ioctl() */
/**
@@ -791,7 +633,7 @@ static int n_hdlc_tty_ioctl(struct tty_struct *tty, struct file *file,
* @tty - pointer to tty instance data
* @filp - pointer to open file object for device
* @poll_table - wait queue for operations
- *
+ *
* Determine which operations (read/write) will not block and return info
* to caller.
* Returns a bit mask containing info on which ops will not block.
@@ -799,33 +641,50 @@ static int n_hdlc_tty_ioctl(struct tty_struct *tty, struct file *file,
static __poll_t n_hdlc_tty_poll(struct tty_struct *tty, struct file *filp,
poll_table *wait)
{
- struct n_hdlc *n_hdlc = tty2n_hdlc (tty);
+ struct n_hdlc *n_hdlc = tty->disc_data;
__poll_t mask = 0;
- if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_tty_poll() called\n",__FILE__,__LINE__);
-
- if (n_hdlc && n_hdlc->magic == HDLC_MAGIC && tty == n_hdlc->tty) {
- /* queue current process into any wait queue that */
- /* may awaken in the future (read and write) */
-
- poll_wait(filp, &tty->read_wait, wait);
- poll_wait(filp, &tty->write_wait, wait);
-
- /* set bits for operations that won't block */
- if (!list_empty(&n_hdlc->rx_buf_list.list))
- mask |= EPOLLIN | EPOLLRDNORM; /* readable */
- if (test_bit(TTY_OTHER_CLOSED, &tty->flags))
- mask |= EPOLLHUP;
- if (tty_hung_up_p(filp))
- mask |= EPOLLHUP;
- if (!tty_is_writelocked(tty) &&
- !list_empty(&n_hdlc->tx_free_buf_list.list))
- mask |= EPOLLOUT | EPOLLWRNORM; /* writable */
- }
+ if (n_hdlc->magic != HDLC_MAGIC)
+ return 0;
+
+ /*
+ * queue the current process into any wait queue that may awaken in the
+ * future (read and write)
+ */
+ poll_wait(filp, &tty->read_wait, wait);
+ poll_wait(filp, &tty->write_wait, wait);
+
+ /* set bits for operations that won't block */
+ if (!list_empty(&n_hdlc->rx_buf_list.list))
+ mask |= EPOLLIN | EPOLLRDNORM; /* readable */
+ if (test_bit(TTY_OTHER_CLOSED, &tty->flags))
+ mask |= EPOLLHUP;
+ if (tty_hung_up_p(filp))
+ mask |= EPOLLHUP;
+ if (!tty_is_writelocked(tty) &&
+ !list_empty(&n_hdlc->tx_free_buf_list.list))
+ mask |= EPOLLOUT | EPOLLWRNORM; /* writable */
+
return mask;
} /* end of n_hdlc_tty_poll() */
+static void n_hdlc_alloc_buf(struct n_hdlc_buf_list *list, unsigned int count,
+ const char *name)
+{
+ struct n_hdlc_buf *buf;
+ unsigned int i;
+
+ for (i = 0; i < count; i++) {
+ buf = kmalloc(struct_size(buf, buf, maxframe), GFP_KERNEL);
+ if (!buf) {
+ pr_debug("%s(%d)%s(), kmalloc() failed for %s buffer %u\n",
+ __FILE__, __LINE__, __func__, name, i);
+ return;
+ }
+ n_hdlc_buf_put(list, buf);
+ }
+}
+
/**
* n_hdlc_alloc - allocate an n_hdlc instance data structure
*
@@ -833,8 +692,6 @@ static __poll_t n_hdlc_tty_poll(struct tty_struct *tty, struct file *filp,
*/
static struct n_hdlc *n_hdlc_alloc(void)
{
- struct n_hdlc_buf *buf;
- int i;
struct n_hdlc *n_hdlc = kzalloc(sizeof(*n_hdlc), GFP_KERNEL);
if (!n_hdlc)
@@ -850,30 +707,14 @@ static struct n_hdlc *n_hdlc_alloc(void)
INIT_LIST_HEAD(&n_hdlc->rx_buf_list.list);
INIT_LIST_HEAD(&n_hdlc->tx_buf_list.list);
- /* allocate free rx buffer list */
- for(i=0;i<DEFAULT_RX_BUF_COUNT;i++) {
- buf = kmalloc(struct_size(buf, buf, maxframe), GFP_KERNEL);
- if (buf)
- n_hdlc_buf_put(&n_hdlc->rx_free_buf_list,buf);
- else if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_alloc(), kalloc() failed for rx buffer %d\n",__FILE__,__LINE__, i);
- }
-
- /* allocate free tx buffer list */
- for(i=0;i<DEFAULT_TX_BUF_COUNT;i++) {
- buf = kmalloc(struct_size(buf, buf, maxframe), GFP_KERNEL);
- if (buf)
- n_hdlc_buf_put(&n_hdlc->tx_free_buf_list,buf);
- else if (debuglevel >= DEBUG_LEVEL_INFO)
- printk("%s(%d)n_hdlc_alloc(), kalloc() failed for tx buffer %d\n",__FILE__,__LINE__, i);
- }
-
+ n_hdlc_alloc_buf(&n_hdlc->rx_free_buf_list, DEFAULT_RX_BUF_COUNT, "rx");
+ n_hdlc_alloc_buf(&n_hdlc->tx_free_buf_list, DEFAULT_TX_BUF_COUNT, "tx");
+
/* Initialize the control block */
n_hdlc->magic = HDLC_MAGIC;
- n_hdlc->flags = 0;
-
+
return n_hdlc;
-
+
} /* end of n_hdlc_alloc() */
/**
@@ -915,7 +756,7 @@ static void n_hdlc_buf_put(struct n_hdlc_buf_list *buf_list,
/**
* n_hdlc_buf_get - remove and return an HDLC buffer from list
* @buf_list - pointer to HDLC buffer list
- *
+ *
* Remove and return an HDLC buffer from the head of the specified HDLC buffer
* list.
* Returns a pointer to HDLC buffer if available, otherwise %NULL.
@@ -938,44 +779,39 @@ static struct n_hdlc_buf *n_hdlc_buf_get(struct n_hdlc_buf_list *buf_list)
return buf;
} /* end of n_hdlc_buf_get() */
-static const char hdlc_banner[] __initconst =
- KERN_INFO "HDLC line discipline maxframe=%u\n";
-static const char hdlc_register_ok[] __initconst =
- KERN_INFO "N_HDLC line discipline registered.\n";
-static const char hdlc_register_fail[] __initconst =
- KERN_ERR "error registering line discipline: %d\n";
+static struct tty_ldisc_ops n_hdlc_ldisc = {
+ .owner = THIS_MODULE,
+ .magic = TTY_LDISC_MAGIC,
+ .name = "hdlc",
+ .open = n_hdlc_tty_open,
+ .close = n_hdlc_tty_close,
+ .read = n_hdlc_tty_read,
+ .write = n_hdlc_tty_write,
+ .ioctl = n_hdlc_tty_ioctl,
+ .poll = n_hdlc_tty_poll,
+ .receive_buf = n_hdlc_tty_receive,
+ .write_wakeup = n_hdlc_tty_wakeup,
+ .flush_buffer = flush_rx_queue,
+};
static int __init n_hdlc_init(void)
{
int status;
/* range check maxframe arg */
- if (maxframe < 4096)
- maxframe = 4096;
- else if (maxframe > 65535)
- maxframe = 65535;
-
- printk(hdlc_banner, maxframe);
+ maxframe = clamp(maxframe, 4096, MAX_HDLC_FRAME_SIZE);
status = tty_register_ldisc(N_HDLC, &n_hdlc_ldisc);
if (!status)
- printk(hdlc_register_ok);
+ pr_info("N_HDLC line discipline registered with maxframe=%d\n",
+ maxframe);
else
- printk(hdlc_register_fail, status);
+ pr_err("N_HDLC: error registering line discipline: %d\n",
+ status);
return status;
-
-} /* end of init_module() */
-
-#ifdef CONFIG_SPARC
-#undef __exitdata
-#define __exitdata
-#endif
-static const char hdlc_unregister_ok[] __exitdata =
- KERN_INFO "N_HDLC: line discipline unregistered\n";
-static const char hdlc_unregister_fail[] __exitdata =
- KERN_ERR "N_HDLC: can't unregister line discipline (err = %d)\n";
+} /* end of init_module() */
static void __exit n_hdlc_exit(void)
{
@@ -983,9 +819,10 @@ static void __exit n_hdlc_exit(void)
int status = tty_unregister_ldisc(N_HDLC);
if (status)
- printk(hdlc_unregister_fail, status);
+ pr_err("N_HDLC: can't unregister line discipline (err = %d)\n",
+ status);
else
- printk(hdlc_unregister_ok);
+ pr_info("N_HDLC: line discipline unregistered\n");
}
module_init(n_hdlc_init);
@@ -993,6 +830,5 @@ module_exit(n_hdlc_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Paul Fulghum paulkf@microgate.com");
-module_param(debuglevel, int, 0);
module_param(maxframe, int, 0);
MODULE_ALIAS_LDISC(N_HDLC);
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index f9c584244f72..1794d84e7bf6 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -84,7 +84,7 @@
#ifdef N_TTY_TRACE
# define n_tty_trace(f, args...) trace_printk(f, ##args)
#else
-# define n_tty_trace(f, args...)
+# define n_tty_trace(f, args...) no_printk(f, ##args)
#endif
struct n_tty_data {
@@ -654,9 +654,9 @@ static size_t __process_echoes(struct tty_struct *tty)
op = echo_buf(ldata, tail + 1);
switch (op) {
+ case ECHO_OP_ERASE_TAB: {
unsigned int num_chars, num_bs;
- case ECHO_OP_ERASE_TAB:
if (MASK(ldata->echo_commit) == MASK(tail + 2))
goto not_yet_stored;
num_chars = echo_buf(ldata, tail + 2);
@@ -687,7 +687,7 @@ static size_t __process_echoes(struct tty_struct *tty)
}
tail += 3;
break;
-
+ }
case ECHO_OP_SET_CANON_COL:
ldata->canon_column = ldata->column;
tail += 2;
diff --git a/drivers/tty/serial/8250/8250_bcm2835aux.c b/drivers/tty/serial/8250/8250_bcm2835aux.c
index e70e3cc30050..5cc03bf24f85 100644
--- a/drivers/tty/serial/8250/8250_bcm2835aux.c
+++ b/drivers/tty/serial/8250/8250_bcm2835aux.c
@@ -137,6 +137,24 @@ static struct platform_driver bcm2835aux_serial_driver = {
};
module_platform_driver(bcm2835aux_serial_driver);
+#ifdef CONFIG_SERIAL_8250_CONSOLE
+
+static int __init early_bcm2835aux_setup(struct earlycon_device *device,
+ const char *options)
+{
+ if (!device->port.membase)
+ return -ENODEV;
+
+ device->port.iotype = UPIO_MEM32;
+ device->port.regshift = 2;
+
+ return early_serial8250_setup(device, NULL);
+}
+
+OF_EARLYCON_DECLARE(bcm2835aux, "brcm,bcm2835-aux-uart",
+ early_bcm2835aux_setup);
+#endif
+
MODULE_DESCRIPTION("BCM2835 auxiliar UART driver");
MODULE_AUTHOR("Martin Sperl <kernel@martin.sperl.org>");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/tty/serial/8250/8250_exar.c b/drivers/tty/serial/8250/8250_exar.c
index 91e9b070d36d..65898ef90801 100644
--- a/drivers/tty/serial/8250/8250_exar.c
+++ b/drivers/tty/serial/8250/8250_exar.c
@@ -127,7 +127,7 @@ struct exar8250 {
unsigned int nr;
struct exar8250_board *board;
void __iomem *virt;
- int line[0];
+ int line[];
};
static void exar_pm(struct uart_port *port, unsigned int state, unsigned int old)
diff --git a/drivers/tty/serial/8250/8250_of.c b/drivers/tty/serial/8250/8250_of.c
index f6687756ec5e..ad92f451f3b9 100644
--- a/drivers/tty/serial/8250/8250_of.c
+++ b/drivers/tty/serial/8250/8250_of.c
@@ -7,7 +7,6 @@
#include <linux/console.h>
#include <linux/module.h>
#include <linux/slab.h>
-#include <linux/delay.h>
#include <linux/serial_core.h>
#include <linux/serial_reg.h>
#include <linux/of_address.h>
@@ -26,28 +25,6 @@ struct of_serial_info {
int line;
};
-#ifdef CONFIG_ARCH_TEGRA
-static void tegra_serial_handle_break(struct uart_port *p)
-{
- unsigned int status, tmout = 10000;
-
- do {
- status = p->serial_in(p, UART_LSR);
- if (status & (UART_LSR_FIFOE | UART_LSR_BRK_ERROR_BITS))
- status = p->serial_in(p, UART_RX);
- else
- break;
- if (--tmout == 0)
- break;
- udelay(1);
- } while (1);
-}
-#else
-static inline void tegra_serial_handle_break(struct uart_port *port)
-{
-}
-#endif
-
static int of_8250_rs485_config(struct uart_port *port,
struct serial_rs485 *rs485)
{
@@ -210,10 +187,6 @@ static int of_platform_serial_setup(struct platform_device *ofdev,
port->rs485_config = of_8250_rs485_config;
switch (type) {
- case PORT_TEGRA:
- port->handle_break = tegra_serial_handle_break;
- break;
-
case PORT_RT2880:
port->iotype = UPIO_AU;
break;
@@ -358,7 +331,6 @@ static const struct of_device_id of_platform_serial_table[] = {
{ .compatible = "ns16550", .data = (void *)PORT_16550, },
{ .compatible = "ns16750", .data = (void *)PORT_16750, },
{ .compatible = "ns16850", .data = (void *)PORT_16850, },
- { .compatible = "nvidia,tegra20-uart", .data = (void *)PORT_TEGRA, },
{ .compatible = "nxp,lpc3220-uart", .data = (void *)PORT_LPC3220, },
{ .compatible = "ralink,rt2880-uart", .data = (void *)PORT_RT2880, },
{ .compatible = "intel,xscale-uart", .data = (void *)PORT_XSCALE, },
diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
index 939685fed396..0804469ff052 100644
--- a/drivers/tty/serial/8250/8250_pci.c
+++ b/drivers/tty/serial/8250/8250_pci.c
@@ -53,7 +53,7 @@ struct serial_private {
unsigned int nr;
struct pci_serial_quirk *quirk;
const struct pciserial_board *board;
- int line[0];
+ int line[];
};
static const struct pci_device_id pci_use_msi[] = {
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index 0325f2e53b74..f398f162a1fd 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -1318,8 +1318,8 @@ out_lock:
fintek_8250_probe(up);
if (up->capabilities != old_capabilities) {
- pr_warn("%s: detected caps %08x should be %08x\n",
- port->name, old_capabilities, up->capabilities);
+ dev_warn(port->dev, "detected caps %08x should be %08x\n",
+ old_capabilities, up->capabilities);
}
out:
DEBUG_AUTOCONF("iir=%d ", scratch);
@@ -1683,7 +1683,7 @@ void serial8250_read_char(struct uart_8250_port *up, unsigned char lsr)
lsr &= port->read_status_mask;
if (lsr & UART_LSR_BI) {
- pr_debug("%s: handling break\n", __func__);
+ dev_dbg(port->dev, "handling break\n");
flag = TTY_BREAK;
} else if (lsr & UART_LSR_PE)
flag = TTY_PARITY;
@@ -2134,7 +2134,7 @@ int serial8250_do_startup(struct uart_port *port)
*/
if (!(port->flags & UPF_BUGGY_UART) &&
(serial_port_in(port, UART_LSR) == 0xff)) {
- pr_info_ratelimited("%s: LSR safety check engaged!\n", port->name);
+ dev_info_ratelimited(port->dev, "LSR safety check engaged!\n");
retval = -ENODEV;
goto out;
}
@@ -2166,8 +2166,7 @@ int serial8250_do_startup(struct uart_port *port)
(port->type == PORT_ALTR_16550_F128)) && (port->fifosize > 1)) {
/* Bounds checking of TX threshold (valid 0 to fifosize-2) */
if ((up->tx_loadsz < 2) || (up->tx_loadsz > port->fifosize)) {
- pr_err("%s TX FIFO Threshold errors, skipping\n",
- port->name);
+ dev_err(port->dev, "TX FIFO Threshold errors, skipping\n");
} else {
serial_port_out(port, UART_ALTR_AFR,
UART_ALTR_EN_TXFIFO_LW);
@@ -2268,8 +2267,7 @@ int serial8250_do_startup(struct uart_port *port)
if (lsr & UART_LSR_TEMT && iir & UART_IIR_NO_INT) {
if (!(up->bugs & UART_BUG_TXEN)) {
up->bugs |= UART_BUG_TXEN;
- pr_debug("%s - enabling bad tx status workarounds\n",
- port->name);
+ dev_dbg(port->dev, "enabling bad tx status workarounds\n");
}
} else {
up->bugs &= ~UART_BUG_TXEN;
@@ -2296,8 +2294,7 @@ dont_test_tx_en:
if (up->dma) {
retval = serial8250_request_dma(up);
if (retval) {
- pr_warn_ratelimited("%s - failed to request DMA\n",
- port->name);
+ dev_warn_ratelimited(port->dev, "failed to request DMA\n");
up->dma = NULL;
}
}
@@ -2880,7 +2877,7 @@ static int do_serial8250_get_rxtrig(struct tty_port *port)
return rxtrig_bytes;
}
-static ssize_t serial8250_get_attr_rx_trig_bytes(struct device *dev,
+static ssize_t rx_trig_bytes_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct tty_port *port = dev_get_drvdata(dev);
@@ -2926,7 +2923,7 @@ static int do_serial8250_set_rxtrig(struct tty_port *port, unsigned char bytes)
return ret;
}
-static ssize_t serial8250_set_attr_rx_trig_bytes(struct device *dev,
+static ssize_t rx_trig_bytes_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct tty_port *port = dev_get_drvdata(dev);
@@ -2947,18 +2944,16 @@ static ssize_t serial8250_set_attr_rx_trig_bytes(struct device *dev,
return count;
}
-static DEVICE_ATTR(rx_trig_bytes, S_IRUSR | S_IWUSR | S_IRGRP,
- serial8250_get_attr_rx_trig_bytes,
- serial8250_set_attr_rx_trig_bytes);
+static DEVICE_ATTR_RW(rx_trig_bytes);
static struct attribute *serial8250_dev_attrs[] = {
&dev_attr_rx_trig_bytes.attr,
- NULL,
- };
+ NULL
+};
static struct attribute_group serial8250_dev_attr_group = {
.attrs = serial8250_dev_attrs,
- };
+};
static void register_dev_spec_attr_grp(struct uart_8250_port *up)
{
diff --git a/drivers/tty/serial/8250/8250_pxa.c b/drivers/tty/serial/8250/8250_pxa.c
index c47188860e32..11612d174716 100644
--- a/drivers/tty/serial/8250/8250_pxa.c
+++ b/drivers/tty/serial/8250/8250_pxa.c
@@ -123,7 +123,7 @@ static int serial_pxa_probe(struct platform_device *pdev)
uart.port.regshift = 2;
uart.port.irq = irqres->start;
uart.port.fifosize = 64;
- uart.port.flags = UPF_IOREMAP | UPF_SKIP_TEST;
+ uart.port.flags = UPF_IOREMAP | UPF_SKIP_TEST | UPF_FIXED_TYPE;
uart.port.dev = &pdev->dev;
uart.port.uartclk = clk_get_rate(data->clk);
uart.port.pm = serial_pxa_pm;
diff --git a/drivers/tty/serial/8250/8250_tegra.c b/drivers/tty/serial/8250/8250_tegra.c
new file mode 100644
index 000000000000..c0ffad1572c6
--- /dev/null
+++ b/drivers/tty/serial/8250/8250_tegra.c
@@ -0,0 +1,198 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Serial Port driver for Tegra devices
+ *
+ * Copyright (c) 2020, NVIDIA CORPORATION. All rights reserved.
+ */
+
+#include <linux/acpi.h>
+#include <linux/clk.h>
+#include <linux/console.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/reset.h>
+#include <linux/slab.h>
+
+#include "8250.h"
+
+struct tegra_uart {
+ struct clk *clk;
+ struct reset_control *rst;
+ int line;
+};
+
+static void tegra_uart_handle_break(struct uart_port *p)
+{
+ unsigned int status, tmout = 10000;
+
+ do {
+ status = p->serial_in(p, UART_LSR);
+ if (status & (UART_LSR_FIFOE | UART_LSR_BRK_ERROR_BITS))
+ status = p->serial_in(p, UART_RX);
+ else
+ break;
+ if (--tmout == 0)
+ break;
+ udelay(1);
+ } while (1);
+}
+
+static int tegra_uart_probe(struct platform_device *pdev)
+{
+ struct uart_8250_port port8250;
+ struct tegra_uart *uart;
+ struct uart_port *port;
+ struct resource *res;
+ int ret;
+
+ uart = devm_kzalloc(&pdev->dev, sizeof(*uart), GFP_KERNEL);
+ if (!uart)
+ return -ENOMEM;
+
+ memset(&port8250, 0, sizeof(port8250));
+
+ port = &port8250.port;
+ spin_lock_init(&port->lock);
+
+ port->flags = UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF | UPF_FIXED_PORT |
+ UPF_FIXED_TYPE;
+ port->iotype = UPIO_MEM32;
+ port->regshift = 2;
+ port->type = PORT_TEGRA;
+ port->irqflags |= IRQF_SHARED;
+ port->dev = &pdev->dev;
+ port->handle_break = tegra_uart_handle_break;
+
+ ret = of_alias_get_id(pdev->dev.of_node, "serial");
+ if (ret >= 0)
+ port->line = ret;
+
+ ret = platform_get_irq(pdev, 0);
+ if (ret < 0)
+ return ret;
+
+ port->irq = ret;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ return -ENODEV;
+
+ port->membase = devm_ioremap(&pdev->dev, res->start,
+ resource_size(res));
+ if (!port->membase)
+ return -ENOMEM;
+
+ port->mapbase = res->start;
+ port->mapsize = resource_size(res);
+
+ uart->rst = devm_reset_control_get_optional_shared(&pdev->dev, NULL);
+ if (IS_ERR(uart->rst))
+ return PTR_ERR(uart->rst);
+
+ if (device_property_read_u32(&pdev->dev, "clock-frequency",
+ &port->uartclk)) {
+ uart->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(uart->clk)) {
+ dev_err(&pdev->dev, "failed to get clock!\n");
+ return -ENODEV;
+ }
+
+ ret = clk_prepare_enable(uart->clk);
+ if (ret < 0)
+ return ret;
+
+ port->uartclk = clk_get_rate(uart->clk);
+ }
+
+ ret = reset_control_deassert(uart->rst);
+ if (ret)
+ goto err_clkdisable;
+
+ ret = serial8250_register_8250_port(&port8250);
+ if (ret < 0)
+ goto err_clkdisable;
+
+ platform_set_drvdata(pdev, uart);
+ uart->line = ret;
+
+ return 0;
+
+err_clkdisable:
+ clk_disable_unprepare(uart->clk);
+
+ return ret;
+}
+
+static int tegra_uart_remove(struct platform_device *pdev)
+{
+ struct tegra_uart *uart = platform_get_drvdata(pdev);
+
+ serial8250_unregister_port(uart->line);
+ reset_control_assert(uart->rst);
+ clk_disable_unprepare(uart->clk);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int tegra_uart_suspend(struct device *dev)
+{
+ struct tegra_uart *uart = dev_get_drvdata(dev);
+ struct uart_8250_port *port8250 = serial8250_get_port(uart->line);
+ struct uart_port *port = &port8250->port;
+
+ serial8250_suspend_port(uart->line);
+
+ if (!uart_console(port) || console_suspend_enabled)
+ clk_disable_unprepare(uart->clk);
+
+ return 0;
+}
+
+static int tegra_uart_resume(struct device *dev)
+{
+ struct tegra_uart *uart = dev_get_drvdata(dev);
+ struct uart_8250_port *port8250 = serial8250_get_port(uart->line);
+ struct uart_port *port = &port8250->port;
+
+ if (!uart_console(port) || console_suspend_enabled)
+ clk_prepare_enable(uart->clk);
+
+ serial8250_resume_port(uart->line);
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(tegra_uart_pm_ops, tegra_uart_suspend,
+ tegra_uart_resume);
+
+static const struct of_device_id tegra_uart_of_match[] = {
+ { .compatible = "nvidia,tegra20-uart", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, tegra_uart_of_match);
+
+static const struct acpi_device_id tegra_uart_acpi_match[] = {
+ { "NVDA0100", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(acpi, tegra_uart_acpi_match);
+
+static struct platform_driver tegra_uart_driver = {
+ .driver = {
+ .name = "tegra-uart",
+ .pm = &tegra_uart_pm_ops,
+ .of_match_table = tegra_uart_of_match,
+ .acpi_match_table = ACPI_PTR(tegra_uart_acpi_match),
+ },
+ .probe = tegra_uart_probe,
+ .remove = tegra_uart_remove,
+};
+
+module_platform_driver(tegra_uart_driver);
+
+MODULE_AUTHOR("Jeff Brasen <jbrasen@nvidia.com>");
+MODULE_DESCRIPTION("NVIDIA Tegra 8250 Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig
index f16824bbb573..af0688156dd0 100644
--- a/drivers/tty/serial/8250/Kconfig
+++ b/drivers/tty/serial/8250/Kconfig
@@ -500,6 +500,15 @@ config SERIAL_8250_PXA
applicable to both devicetree and legacy boards, and early console is
part of its support.
+config SERIAL_8250_TEGRA
+ tristate "8250 support for Tegra serial ports"
+ default SERIAL_8250
+ depends on SERIAL_8250
+ depends on ARCH_TEGRA || COMPILE_TEST
+ help
+ Select this option if you have machine with an NVIDIA Tegra SoC and
+ wish to enable 8250 serial driver for the Tegra serial interfaces.
+
config SERIAL_OF_PLATFORM
tristate "Devicetree based probing for 8250 ports"
depends on SERIAL_8250 && OF
diff --git a/drivers/tty/serial/8250/Makefile b/drivers/tty/serial/8250/Makefile
index 51a6079d3f1f..a8bfb654d490 100644
--- a/drivers/tty/serial/8250/Makefile
+++ b/drivers/tty/serial/8250/Makefile
@@ -37,6 +37,7 @@ obj-$(CONFIG_SERIAL_8250_INGENIC) += 8250_ingenic.o
obj-$(CONFIG_SERIAL_8250_LPSS) += 8250_lpss.o
obj-$(CONFIG_SERIAL_8250_MID) += 8250_mid.o
obj-$(CONFIG_SERIAL_8250_PXA) += 8250_pxa.o
+obj-$(CONFIG_SERIAL_8250_TEGRA) += 8250_tegra.o
obj-$(CONFIG_SERIAL_OF_PLATFORM) += 8250_of.o
CFLAGS_8250_ingenic.o += -I$(srctree)/scripts/dtc/libfdt
diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 52eaac21ff9f..880b96201530 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -237,7 +237,6 @@ config SERIAL_CLPS711X_CONSOLE
config SERIAL_SAMSUNG
tristate "Samsung SoC serial support"
- depends on PLAT_SAMSUNG || ARCH_EXYNOS || COMPILE_TEST
select SERIAL_CORE
help
Support for the on-chip UARTs on the Samsung S3C24XX series CPUs,
@@ -260,15 +259,6 @@ config SERIAL_SAMSUNG_UARTS
help
Select the number of available UART ports for the Samsung S3C
serial driver
-
-config SERIAL_SAMSUNG_DEBUG
- bool "Samsung SoC serial debug"
- depends on SERIAL_SAMSUNG && DEBUG_LL
- help
- Add support for debugging the serial driver. Since this is
- generally being used as a console, we use our own output
- routines that go via the low-level debug printascii()
- function.
config SERIAL_SAMSUNG_CONSOLE
bool "Support for console on Samsung SoC serial port"
@@ -1111,7 +1101,7 @@ config SERIAL_SC16IS7XX_SPI
help
Enable SC16IS7xx driver on SPI bus,
If required say y, and say n to spi if not required,
- This is additional support to exsisting driver.
+ This is additional support to existing driver.
You must select at least one bus for the driver to be built.
config SERIAL_TIMBERDALE
diff --git a/drivers/tty/serial/efm32-uart.c b/drivers/tty/serial/efm32-uart.c
index 2ac87128d7fd..f12f29cf4f31 100644
--- a/drivers/tty/serial/efm32-uart.c
+++ b/drivers/tty/serial/efm32-uart.c
@@ -200,7 +200,7 @@ static void efm32_uart_rx_chars(struct efm32_uart_port *efm_port)
/*
* This is a reserved bit and I only saw it read as 0. But to be
* sure not to be confused too much by new devices adhere to the
- * warning in the reference manual that reserverd bits might
+ * warning in the reference manual that reserved bits might
* read as 1 in the future.
*/
rxdata &= ~SW_UARTn_RXDATAX_BERR;
diff --git a/drivers/tty/serial/kgdboc.c b/drivers/tty/serial/kgdboc.c
index c7d51b51898f..c9f94fa82be4 100644
--- a/drivers/tty/serial/kgdboc.c
+++ b/drivers/tty/serial/kgdboc.c
@@ -169,15 +169,13 @@ static int configure_kgdboc(void)
if (!p)
goto noconfig;
- cons = console_drivers;
- while (cons) {
+ for_each_console(cons) {
int idx;
if (cons->device && cons->device(cons, &idx) == p &&
idx == tty_line) {
kgdboc_io_ops.is_console = 1;
break;
}
- cons = cons->next;
}
kgdb_tty_driver = p;
diff --git a/drivers/tty/serial/sc16is7xx.c b/drivers/tty/serial/sc16is7xx.c
index 7d3ae31cc720..06e8071d5601 100644
--- a/drivers/tty/serial/sc16is7xx.c
+++ b/drivers/tty/serial/sc16is7xx.c
@@ -329,7 +329,7 @@ struct sc16is7xx_port {
struct task_struct *kworker_task;
struct kthread_work irq_work;
struct mutex efr_lock;
- struct sc16is7xx_one p[0];
+ struct sc16is7xx_one p[];
};
static unsigned long sc16is7xx_lines;
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 76e506ee335c..5444293fe2e8 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -1908,6 +1908,24 @@ static int uart_proc_show(struct seq_file *m, void *v)
}
#endif
+static inline bool uart_console_enabled(struct uart_port *port)
+{
+ return uart_console(port) && (port->cons->flags & CON_ENABLED);
+}
+
+/*
+ * Ensure that the serial console lock is initialised early.
+ * If this port is a console, then the spinlock is already initialised.
+ */
+static inline void uart_port_spin_lock_init(struct uart_port *port)
+{
+ if (uart_console_enabled(port))
+ return;
+
+ spin_lock_init(&port->lock);
+ lockdep_set_class(&port->lock, &port_lock_key);
+}
+
#if defined(CONFIG_SERIAL_CORE_CONSOLE) || defined(CONFIG_CONSOLE_POLL)
/**
* uart_console_write - write a console message to a serial port
@@ -2060,16 +2078,7 @@ uart_set_options(struct uart_port *port, struct console *co,
struct ktermios termios;
static struct ktermios dummy;
- /*
- * Ensure that the serial console lock is initialised
- * early.
- * If this port is a console, then the spinlock is already
- * initialised.
- */
- if (!(uart_console(port) && (port->cons->flags & CON_ENABLED))) {
- spin_lock_init(&port->lock);
- lockdep_set_class(&port->lock, &port_lock_key);
- }
+ uart_port_spin_lock_init(port);
memset(&termios, 0, sizeof(struct ktermios));
@@ -2605,7 +2614,7 @@ struct tty_driver *uart_console_device(struct console *co, int *index)
}
EXPORT_SYMBOL_GPL(uart_console_device);
-static ssize_t uart_get_attr_uartclk(struct device *dev,
+static ssize_t uartclk_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct serial_struct tmp;
@@ -2615,7 +2624,7 @@ static ssize_t uart_get_attr_uartclk(struct device *dev,
return snprintf(buf, PAGE_SIZE, "%d\n", tmp.baud_base * 16);
}
-static ssize_t uart_get_attr_type(struct device *dev,
+static ssize_t type_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct serial_struct tmp;
@@ -2624,7 +2633,8 @@ static ssize_t uart_get_attr_type(struct device *dev,
uart_get_info(port, &tmp);
return snprintf(buf, PAGE_SIZE, "%d\n", tmp.type);
}
-static ssize_t uart_get_attr_line(struct device *dev,
+
+static ssize_t line_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct serial_struct tmp;
@@ -2634,7 +2644,7 @@ static ssize_t uart_get_attr_line(struct device *dev,
return snprintf(buf, PAGE_SIZE, "%d\n", tmp.line);
}
-static ssize_t uart_get_attr_port(struct device *dev,
+static ssize_t port_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct serial_struct tmp;
@@ -2648,7 +2658,7 @@ static ssize_t uart_get_attr_port(struct device *dev,
return snprintf(buf, PAGE_SIZE, "0x%lX\n", ioaddr);
}
-static ssize_t uart_get_attr_irq(struct device *dev,
+static ssize_t irq_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct serial_struct tmp;
@@ -2658,7 +2668,7 @@ static ssize_t uart_get_attr_irq(struct device *dev,
return snprintf(buf, PAGE_SIZE, "%d\n", tmp.irq);
}
-static ssize_t uart_get_attr_flags(struct device *dev,
+static ssize_t flags_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct serial_struct tmp;
@@ -2668,7 +2678,7 @@ static ssize_t uart_get_attr_flags(struct device *dev,
return snprintf(buf, PAGE_SIZE, "0x%X\n", tmp.flags);
}
-static ssize_t uart_get_attr_xmit_fifo_size(struct device *dev,
+static ssize_t xmit_fifo_size_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct serial_struct tmp;
@@ -2678,8 +2688,7 @@ static ssize_t uart_get_attr_xmit_fifo_size(struct device *dev,
return snprintf(buf, PAGE_SIZE, "%d\n", tmp.xmit_fifo_size);
}
-
-static ssize_t uart_get_attr_close_delay(struct device *dev,
+static ssize_t close_delay_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct serial_struct tmp;
@@ -2689,8 +2698,7 @@ static ssize_t uart_get_attr_close_delay(struct device *dev,
return snprintf(buf, PAGE_SIZE, "%d\n", tmp.close_delay);
}
-
-static ssize_t uart_get_attr_closing_wait(struct device *dev,
+static ssize_t closing_wait_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct serial_struct tmp;
@@ -2700,7 +2708,7 @@ static ssize_t uart_get_attr_closing_wait(struct device *dev,
return snprintf(buf, PAGE_SIZE, "%d\n", tmp.closing_wait);
}
-static ssize_t uart_get_attr_custom_divisor(struct device *dev,
+static ssize_t custom_divisor_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct serial_struct tmp;
@@ -2710,7 +2718,7 @@ static ssize_t uart_get_attr_custom_divisor(struct device *dev,
return snprintf(buf, PAGE_SIZE, "%d\n", tmp.custom_divisor);
}
-static ssize_t uart_get_attr_io_type(struct device *dev,
+static ssize_t io_type_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct serial_struct tmp;
@@ -2720,7 +2728,7 @@ static ssize_t uart_get_attr_io_type(struct device *dev,
return snprintf(buf, PAGE_SIZE, "%d\n", tmp.io_type);
}
-static ssize_t uart_get_attr_iomem_base(struct device *dev,
+static ssize_t iomem_base_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct serial_struct tmp;
@@ -2730,7 +2738,7 @@ static ssize_t uart_get_attr_iomem_base(struct device *dev,
return snprintf(buf, PAGE_SIZE, "0x%lX\n", (unsigned long)tmp.iomem_base);
}
-static ssize_t uart_get_attr_iomem_reg_shift(struct device *dev,
+static ssize_t iomem_reg_shift_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct serial_struct tmp;
@@ -2740,28 +2748,28 @@ static ssize_t uart_get_attr_iomem_reg_shift(struct device *dev,
return snprintf(buf, PAGE_SIZE, "%d\n", tmp.iomem_reg_shift);
}
-static DEVICE_ATTR(type, S_IRUSR | S_IRGRP, uart_get_attr_type, NULL);
-static DEVICE_ATTR(line, S_IRUSR | S_IRGRP, uart_get_attr_line, NULL);
-static DEVICE_ATTR(port, S_IRUSR | S_IRGRP, uart_get_attr_port, NULL);
-static DEVICE_ATTR(irq, S_IRUSR | S_IRGRP, uart_get_attr_irq, NULL);
-static DEVICE_ATTR(flags, S_IRUSR | S_IRGRP, uart_get_attr_flags, NULL);
-static DEVICE_ATTR(xmit_fifo_size, S_IRUSR | S_IRGRP, uart_get_attr_xmit_fifo_size, NULL);
-static DEVICE_ATTR(uartclk, S_IRUSR | S_IRGRP, uart_get_attr_uartclk, NULL);
-static DEVICE_ATTR(close_delay, S_IRUSR | S_IRGRP, uart_get_attr_close_delay, NULL);
-static DEVICE_ATTR(closing_wait, S_IRUSR | S_IRGRP, uart_get_attr_closing_wait, NULL);
-static DEVICE_ATTR(custom_divisor, S_IRUSR | S_IRGRP, uart_get_attr_custom_divisor, NULL);
-static DEVICE_ATTR(io_type, S_IRUSR | S_IRGRP, uart_get_attr_io_type, NULL);
-static DEVICE_ATTR(iomem_base, S_IRUSR | S_IRGRP, uart_get_attr_iomem_base, NULL);
-static DEVICE_ATTR(iomem_reg_shift, S_IRUSR | S_IRGRP, uart_get_attr_iomem_reg_shift, NULL);
+static DEVICE_ATTR_RO(uartclk);
+static DEVICE_ATTR_RO(type);
+static DEVICE_ATTR_RO(line);
+static DEVICE_ATTR_RO(port);
+static DEVICE_ATTR_RO(irq);
+static DEVICE_ATTR_RO(flags);
+static DEVICE_ATTR_RO(xmit_fifo_size);
+static DEVICE_ATTR_RO(close_delay);
+static DEVICE_ATTR_RO(closing_wait);
+static DEVICE_ATTR_RO(custom_divisor);
+static DEVICE_ATTR_RO(io_type);
+static DEVICE_ATTR_RO(iomem_base);
+static DEVICE_ATTR_RO(iomem_reg_shift);
static struct attribute *tty_dev_attrs[] = {
+ &dev_attr_uartclk.attr,
&dev_attr_type.attr,
&dev_attr_line.attr,
&dev_attr_port.attr,
&dev_attr_irq.attr,
&dev_attr_flags.attr,
&dev_attr_xmit_fifo_size.attr,
- &dev_attr_uartclk.attr,
&dev_attr_close_delay.attr,
&dev_attr_closing_wait.attr,
&dev_attr_custom_divisor.attr,
@@ -2824,14 +2832,8 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport)
goto out;
}
- /*
- * If this port is a console, then the spinlock is already
- * initialised.
- */
- if (!(uart_console(uport) && (uport->cons->flags & CON_ENABLED))) {
- spin_lock_init(&uport->lock);
- lockdep_set_class(&uport->lock, &port_lock_key);
- }
+ uart_port_spin_lock_init(uport);
+
if (uport->cons && uport->dev)
of_console_check(uport->dev->of_node, uport->cons->name, uport->line);
diff --git a/drivers/tty/vt/selection.c b/drivers/tty/vt/selection.c
index 0c50d7410b31..714992693974 100644
--- a/drivers/tty/vt/selection.c
+++ b/drivers/tty/vt/selection.c
@@ -88,6 +88,11 @@ void clear_selection(void)
}
EXPORT_SYMBOL_GPL(clear_selection);
+bool vc_is_sel(struct vc_data *vc)
+{
+ return vc == sel_cons;
+}
+
/*
* User settable table: what characters are to be considered alphabetic?
* 128 bits. Locked by the console lock.
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 0cfbb7182b5a..8fa059ec6cc8 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -890,8 +890,9 @@ static void hide_softcursor(struct vc_data *vc)
static void hide_cursor(struct vc_data *vc)
{
- if (vc == sel_cons)
+ if (vc_is_sel(vc))
clear_selection();
+
vc->vc_sw->con_cursor(vc, CM_ERASE);
hide_softcursor(vc);
}
@@ -901,7 +902,7 @@ static void set_cursor(struct vc_data *vc)
if (!con_is_fg(vc) || console_blanked || vc->vc_mode == KD_GRAPHICS)
return;
if (vc->vc_deccm) {
- if (vc == sel_cons)
+ if (vc_is_sel(vc))
clear_selection();
add_softcursor(vc);
if ((vc->vc_cursor_type & 0x0f) != 1)
@@ -1207,7 +1208,7 @@ static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
}
}
- if (vc == sel_cons)
+ if (vc_is_sel(vc))
clear_selection();
old_rows = vc->vc_rows;
diff --git a/drivers/tty/vt/vt_ioctl.c b/drivers/tty/vt/vt_ioctl.c
index ee6c91ef1f6c..693d9d7ffb68 100644
--- a/drivers/tty/vt/vt_ioctl.c
+++ b/drivers/tty/vt/vt_ioctl.c
@@ -40,10 +40,25 @@
#include <linux/selection.h>
char vt_dont_switch;
-extern struct tty_driver *console_driver;
-#define VT_IS_IN_USE(i) (console_driver->ttys[i] && console_driver->ttys[i]->count)
-#define VT_BUSY(i) (VT_IS_IN_USE(i) || i == fg_console || vc_cons[i].d == sel_cons)
+static inline bool vt_in_use(unsigned int i)
+{
+ extern struct tty_driver *console_driver;
+
+ return console_driver->ttys[i] && console_driver->ttys[i]->count;
+}
+
+static inline bool vt_busy(int i)
+{
+ if (vt_in_use(i))
+ return true;
+ if (i == fg_console)
+ return true;
+ if (vc_is_sel(vc_cons[i].d))
+ return true;
+
+ return false;
+}
/*
* Console (vt and kd) routines, as defined by USL SVR4 manual, and by
@@ -289,7 +304,7 @@ static int vt_disallocate(unsigned int vc_num)
int ret = 0;
console_lock();
- if (VT_BUSY(vc_num))
+ if (vt_busy(vc_num))
ret = -EBUSY;
else if (vc_num)
vc = vc_deallocate(vc_num);
@@ -311,7 +326,7 @@ static void vt_disallocate_all(void)
console_lock();
for (i = 1; i < MAX_NR_CONSOLES; i++)
- if (!VT_BUSY(i))
+ if (!vt_busy(i))
vc[i] = vc_deallocate(i);
else
vc[i] = NULL;
@@ -648,7 +663,7 @@ int vt_ioctl(struct tty_struct *tty,
state = 1; /* /dev/tty0 is always open */
for (i = 0, mask = 2; i < MAX_NR_CONSOLES && mask;
++i, mask <<= 1)
- if (VT_IS_IN_USE(i))
+ if (vt_in_use(i))
state |= mask;
ret = put_user(state, &vtstat->v_state);
}
@@ -661,7 +676,7 @@ int vt_ioctl(struct tty_struct *tty,
case VT_OPENQRY:
/* FIXME: locking ? - but then this is a stupid API */
for (i = 0; i < MAX_NR_CONSOLES; ++i)
- if (! VT_IS_IN_USE(i))
+ if (!vt_in_use(i))
break;
uival = i < MAX_NR_CONSOLES ? (i+1) : -1;
goto setint;
generated by cgit v1.2.3 (git 2.25.1) at 2025-06-28 16:02:31 +0000