additional mode or an USART new feature.
- reg: Should contain registers location and length
- interrupts: Should contain interrupt
+- clock-names: tuple listing input clock names.
+ Required elements: "usart"
+- clocks: phandles to input clocks.
Optional properties:
- atmel,use-dma-rx: use of PDC or DMA for receiving data
compatible = "atmel,at91sam9260-usart";
reg = <0xfff8c000 0x4000>;
interrupts = <7>;
+ clocks = <&usart0_clk>;
+ clock-names = "usart";
atmel,use-dma-rx;
atmel,use-dma-tx;
};
compatible = "atmel,at91sam9260-usart";
reg = <0xf001c000 0x100>;
interrupts = <12 4 5>;
+ clocks = <&usart0_clk>;
+ clock-names = "usart";
atmel,use-dma-rx;
atmel,use-dma-tx;
dmas = <&dma0 2 0x3>,
--- /dev/null
+* Cirrus Logic CLPS711X Universal Asynchronous Receiver/Transmitter (UART)
+
+Required properties:
+- compatible: Should be "cirrus,clps711x-uart".
+- reg: Address and length of the register set for the device.
+- interrupts: Should contain UART TX and RX interrupt.
+- clocks: Should contain UART core clock number.
+- syscon: Phandle to SYSCON node, which contain UART control bits.
+
+Optional properties:
+- uart-use-ms: Indicate the UART has modem signal (DCD, DSR, CTS).
+
+Note: Each UART port should have an alias correctly numbered
+in "aliases" node.
+
+Example:
+ aliases {
+ serial0 = &uart1;
+ };
+
+ uart1: uart@80000480 {
+ compatible = "cirrus,clps711x-uart";
+ reg = <0x80000480 0x80>;
+ interrupts = <12 13>;
+ clocks = <&clks 11>;
+ syscon = <&syscon1>;
+ uart-use-ms;
+ };
&clps711x_syscon_res[i], 1);
}
+static const struct resource clps711x_uart1_res[] __initconst = {
+ DEFINE_RES_MEM(CLPS711X_PHYS_BASE + UARTDR1, SZ_128),
+ DEFINE_RES_IRQ(IRQ_UTXINT1),
+ DEFINE_RES_IRQ(IRQ_URXINT1),
+};
+
+static const struct resource clps711x_uart2_res[] __initconst = {
+ DEFINE_RES_MEM(CLPS711X_PHYS_BASE + UARTDR2, SZ_128),
+ DEFINE_RES_IRQ(IRQ_UTXINT2),
+ DEFINE_RES_IRQ(IRQ_URXINT2),
+};
+
+static void __init clps711x_add_uart(void)
+{
+ platform_device_register_simple("clps711x-uart", 0, clps711x_uart1_res,
+ ARRAY_SIZE(clps711x_uart1_res));
+ platform_device_register_simple("clps711x-uart", 1, clps711x_uart2_res,
+ ARRAY_SIZE(clps711x_uart2_res));
+};
+
void __init clps711x_devices_init(void)
{
clps711x_add_gpio();
clps711x_add_syscon();
+ clps711x_add_uart();
}
/* If port is closing, signal caller to try again */
if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING){
- if (port->flags & ASYNC_CLOSING)
- interruptible_sleep_on(&port->close_wait);
+ wait_event_interruptible_tty(tty, port->close_wait,
+ !(port->flags & ASYNC_CLOSING));
retval = ((port->flags & ASYNC_HUP_NOTIFY) ?
-EAGAIN : -ERESTARTSYS);
goto cleanup;
{
struct serport *serport = (struct serport*) tty->disc_data;
unsigned long flags;
- unsigned int ch_flags;
+ unsigned int ch_flags = 0;
int i;
spin_lock_irqsave(&serport->lock, flags);
goto out;
for (i = 0; i < count; i++) {
- switch (fp[i]) {
- case TTY_FRAME:
- ch_flags = SERIO_FRAME;
- break;
-
- case TTY_PARITY:
- ch_flags = SERIO_PARITY;
- break;
-
- default:
- ch_flags = 0;
- break;
+ if (fp) {
+ switch (fp[i]) {
+ case TTY_FRAME:
+ ch_flags = SERIO_FRAME;
+ break;
+
+ case TTY_PARITY:
+ ch_flags = SERIO_PARITY;
+ break;
+
+ default:
+ ch_flags = 0;
+ break;
+ }
}
serio_interrupt(serport->serio, cp[i], ch_flags);
err = pci_enable_device (dev);
if (err) {
- pci_set_drvdata (dev, NULL);
kfree (priv);
return err;
}
if (parport_register (dev, id)) {
- pci_set_drvdata (dev, NULL);
kfree (priv);
return -ENODEV;
}
int i;
for (i = 0; i < priv->num_par; i++)
parport_pc_unregister_port (priv->port[i]);
- pci_set_drvdata (dev, NULL);
kfree (priv);
return -ENODEV;
}
struct parport_serial_private *priv = pci_get_drvdata (dev);
int i;
- pci_set_drvdata(dev, NULL);
-
// Serial ports
if (priv->serial)
pciserial_remove_ports(priv->serial);
To compile this driver as a module, say M here: the module will
be called firewire-serial.
+
+if FIREWIRE_SERIAL
+
+config FWTTY_MAX_TOTAL_PORTS
+ int "Maximum number of serial ports supported"
+ default "64"
+ help
+ Set this to the maximum number of serial ports you want the
+ firewire-serial driver to support.
+
+config FWTTY_MAX_CARD_PORTS
+ int "Maximum number of serial ports supported per adapter"
+ range 0 FWTTY_MAX_TOTAL_PORTS
+ default "32"
+ help
+ Set this to the maximum number of serial ports each firewire
+ adapter supports. The actual number of serial ports registered
+ is set with the module parameter "ttys".
+
+endif
#ifdef FWTTY_PROFILING
-static void profile_fifo_avail(struct fwtty_port *port, unsigned *stat)
+static void fwtty_profile_fifo(struct fwtty_port *port, unsigned *stat)
{
spin_lock_bh(&port->lock);
- profile_size_distrib(stat, dma_fifo_avail(&port->tx_fifo));
+ fwtty_profile_data(stat, dma_fifo_avail(&port->tx_fifo));
spin_unlock_bh(&port->lock);
}
-static void dump_profile(struct seq_file *m, struct stats *stats)
+static void fwtty_dump_profile(struct seq_file *m, struct stats *stats)
{
/* for each stat, print sum of 0 to 2^k, then individually */
int k = 4;
}
#else
-#define profile_fifo_avail(port, stat)
-#define dump_profile(m, stats)
+#define fwtty_profile_fifo(port, stat)
+#define fwtty_dump_profile(m, stats)
#endif
/*
return err;
}
-static void __fwtty_throttle(struct fwtty_port *port, struct tty_struct *tty)
+static void fwtty_throttle_port(struct fwtty_port *port)
{
+ struct tty_struct *tty;
unsigned old;
+ tty = tty_port_tty_get(&port->port);
+ if (!tty)
+ return;
+
+ spin_lock_bh(&port->lock);
+
old = port->mctrl;
port->mctrl |= OOB_RX_THROTTLE;
if (C_CRTSCTS(tty))
port->mctrl &= ~TIOCM_RTS;
if (~old & OOB_RX_THROTTLE)
__fwtty_write_port_status(port);
+
+ spin_unlock_bh(&port->lock);
+
+ tty_kref_put(tty);
}
/**
port->icount.brk += brk;
}
-static void fwtty_pushrx(struct work_struct *work)
-{
- struct fwtty_port *port = to_port(work, push);
- struct tty_struct *tty;
- struct buffered_rx *buf, *next;
- int n, c = 0;
-
- spin_lock_bh(&port->lock);
- list_for_each_entry_safe(buf, next, &port->buf_list, list) {
- n = tty_insert_flip_string_fixed_flag(&port->port, buf->data,
- TTY_NORMAL, buf->n);
- c += n;
- port->buffered -= n;
- if (n < buf->n) {
- if (n > 0) {
- memmove(buf->data, buf->data + n, buf->n - n);
- buf->n -= n;
- }
- tty = tty_port_tty_get(&port->port);
- if (tty) {
- __fwtty_throttle(port, tty);
- tty_kref_put(tty);
- }
- break;
- } else {
- list_del(&buf->list);
- kfree(buf);
- }
- }
- if (c > 0)
- tty_flip_buffer_push(&port->port);
-
- if (list_empty(&port->buf_list))
- clear_bit(BUFFERING_RX, &port->flags);
- spin_unlock_bh(&port->lock);
-}
-
-static int fwtty_buffer_rx(struct fwtty_port *port, unsigned char *d, size_t n)
-{
- struct buffered_rx *buf;
- size_t size = (n + sizeof(struct buffered_rx) + 0xFF) & ~0xFF;
-
- if (port->buffered + n > HIGH_WATERMARK) {
- fwtty_err_ratelimited(port, "overflowed rx buffer: buffered: %d new: %zu wtrmk: %d\n",
- port->buffered, n, HIGH_WATERMARK);
- return 0;
- }
- buf = kmalloc(size, GFP_ATOMIC);
- if (!buf)
- return 0;
- INIT_LIST_HEAD(&buf->list);
- buf->n = n;
- memcpy(buf->data, d, n);
-
- spin_lock_bh(&port->lock);
- list_add_tail(&buf->list, &port->buf_list);
- port->buffered += n;
- if (port->buffered > port->stats.watermark)
- port->stats.watermark = port->buffered;
- set_bit(BUFFERING_RX, &port->flags);
- spin_unlock_bh(&port->lock);
-
- return n;
-}
-
static int fwtty_rx(struct fwtty_port *port, unsigned char *data, size_t len)
{
- struct tty_struct *tty;
int c, n = len;
unsigned lsr;
int err = 0;
fwtty_dbg(port, "%d\n", n);
- profile_size_distrib(port->stats.reads, n);
+ fwtty_profile_data(port->stats.reads, n);
if (port->write_only) {
n = 0;
goto out;
}
- if (!test_bit(BUFFERING_RX, &port->flags)) {
- c = tty_insert_flip_string_fixed_flag(&port->port, data,
- TTY_NORMAL, n);
- if (c > 0)
- tty_flip_buffer_push(&port->port);
- n -= c;
-
- if (n) {
- /* start buffering and throttling */
- n -= fwtty_buffer_rx(port, &data[c], n);
-
- tty = tty_port_tty_get(&port->port);
- if (tty) {
- spin_lock_bh(&port->lock);
- __fwtty_throttle(port, tty);
- spin_unlock_bh(&port->lock);
- tty_kref_put(tty);
- }
- }
- } else
- n -= fwtty_buffer_rx(port, data, n);
+ c = tty_insert_flip_string_fixed_flag(&port->port, data, TTY_NORMAL, n);
+ if (c > 0)
+ tty_flip_buffer_push(&port->port);
+ n -= c;
if (n) {
port->overrun = true;
err = -EIO;
+ fwtty_err_ratelimited(port, "flip buffer overrun\n");
+
+ } else {
+ /* throttle the sender if remaining flip buffer space has
+ * reached high watermark to avoid losing data which may be
+ * in-flight. Since the AR request context is 32k, that much
+ * data may have _already_ been acked.
+ */
+ if (tty_buffer_space_avail(&port->port) < HIGH_WATERMARK)
+ fwtty_throttle_port(port);
}
out:
if (n == -EAGAIN)
++port->stats.tx_stall;
else if (n == -ENODATA)
- profile_size_distrib(port->stats.txns, 0);
+ fwtty_profile_data(port->stats.txns, 0);
else {
++port->stats.fifo_errs;
fwtty_err_ratelimited(port, "fifo err: %d\n",
break;
}
- profile_size_distrib(port->stats.txns, txn->dma_pended.len);
+ fwtty_profile_data(port->stats.txns, txn->dma_pended.len);
fwtty_send_txn_async(peer, txn, TCODE_WRITE_BLOCK_REQUEST,
peer->fifo_addr, txn->dma_pended.data,
static void fwtty_port_shutdown(struct tty_port *tty_port)
{
struct fwtty_port *port = to_port(tty_port, port);
- struct buffered_rx *buf, *next;
/* TODO: cancel outstanding transactions */
cancel_delayed_work_sync(&port->emit_breaks);
cancel_delayed_work_sync(&port->drain);
- cancel_work_sync(&port->push);
spin_lock_bh(&port->lock);
- list_for_each_entry_safe(buf, next, &port->buf_list, list) {
- list_del(&buf->list);
- kfree(buf);
- }
- port->buffered = 0;
port->flags = 0;
port->break_ctl = 0;
port->overrun = 0;
int n, len;
fwtty_dbg(port, "%d\n", c);
- profile_size_distrib(port->stats.writes, c);
+ fwtty_profile_data(port->stats.writes, c);
spin_lock_bh(&port->lock);
n = dma_fifo_in(&port->tx_fifo, buf, c);
fwtty_dbg(port, "CRTSCTS: %d\n", (C_CRTSCTS(tty) != 0));
- profile_fifo_avail(port, port->stats.unthrottle);
-
- schedule_work(&port->push);
+ fwtty_profile_fifo(port, port->stats.unthrottle);
spin_lock_bh(&port->lock);
port->mctrl &= ~OOB_RX_THROTTLE;
seq_printf(m, " dr:%d st:%d err:%d lost:%d", stats.dropped,
stats.tx_stall, stats.fifo_errs, stats.lost);
- seq_printf(m, " pkts:%d thr:%d wtrmk:%d", stats.sent, stats.throttled,
- stats.watermark);
+ seq_printf(m, " pkts:%d thr:%d", stats.sent, stats.throttled);
if (port->port.console) {
seq_puts(m, "\n ");
(*port->fwcon_ops->proc_show)(m, port->con_data);
}
- dump_profile(m, &port->stats);
+ fwtty_dump_profile(m, &port->stats);
}
static void fwtty_debugfs_show_peer(struct seq_file *m, struct fwtty_peer *peer)
port->index = FWTTY_INVALID_INDEX;
port->port.ops = &fwtty_port_ops;
port->serial = serial;
+ tty_buffer_set_limit(&port->port, 128 * 1024);
spin_lock_init(&port->lock);
INIT_DELAYED_WORK(&port->drain, fwtty_drain_tx);
INIT_DELAYED_WORK(&port->emit_breaks, fwtty_emit_breaks);
INIT_WORK(&port->hangup, fwtty_do_hangup);
- INIT_WORK(&port->push, fwtty_pushrx);
- INIT_LIST_HEAD(&port->buf_list);
init_waitqueue_head(&port->wait_tx);
port->max_payload = link_speed_to_max_payload(SCODE_100);
dma_fifo_init(&port->tx_fifo);
#ifdef FWTTY_PROFILING
#define DISTRIBUTION_MAX_SIZE 8192
#define DISTRIBUTION_MAX_INDEX (ilog2(DISTRIBUTION_MAX_SIZE) + 1)
-static inline void profile_size_distrib(unsigned stat[], unsigned val)
+static inline void fwtty_profile_data(unsigned stat[], unsigned val)
{
int n = (val) ? min(ilog2(val) + 1, DISTRIBUTION_MAX_INDEX) : 0;
++stat[n];
}
#else
#define DISTRIBUTION_MAX_INDEX 0
-#define profile_size_distrib(st, n)
+#define fwtty_profile_data(st, n)
#endif
/* Parameters for both VIRT_CABLE_PLUG & VIRT_CABLE_PLUG_RSP mgmt codes */
unsigned sent;
unsigned lost;
unsigned throttled;
- unsigned watermark;
unsigned reads[DISTRIBUTION_MAX_INDEX + 1];
unsigned writes[DISTRIBUTION_MAX_INDEX + 1];
unsigned txns[DISTRIBUTION_MAX_INDEX + 1];
#define FWCON_NOTIFY_ATTACH 1
#define FWCON_NOTIFY_DETACH 2
-struct buffered_rx {
- struct list_head list;
- size_t n;
- unsigned char data[0];
-};
-
/**
* fwtty_port: structure used to track/represent underlying tty_port
* @port: underlying tty_port
* The work can race with the writer but concurrent sending is
* prevented with the IN_TX flag. Scheduled under lock to
* limit scheduling when fifo has just been drained.
- * @push: work responsible for pushing buffered rx to the ldisc.
- * rx can become buffered if the tty buffer is filled before the
- * ldisc throttles the sender.
- * @buf_list: list of buffered rx yet to be sent to ldisc
- * @buffered: byte count of buffered rx
* @tx_fifo: fifo used to store & block-up writes for dma to remote
* @max_payload: max bytes transmissable per dma (based on peer's max_payload)
* @status_mask: UART_LSR_* bitmask significant to rx (based on termios)
spinlock_t lock;
unsigned mctrl;
struct delayed_work drain;
- struct work_struct push;
- struct list_head buf_list;
- int buffered;
struct dma_fifo tx_fifo;
int max_payload;
unsigned status_mask;
/* bit #s for flags field */
#define IN_TX 0
#define STOP_TX 1
-#define BUFFERING_RX 2
/* bitmasks for special mctrl/mstatus bits */
#define OOB_RX_THROTTLE 0x00010000
#define FREQ_BREAKS (HZ / 50)
/* Ports are allocated in blocks of num_ports for each fw_card */
-#define MAX_CARD_PORTS 32 /* max # of ports per card */
-#define MAX_TOTAL_PORTS 64 /* max # of ports total */
+#define MAX_CARD_PORTS CONFIG_FWTTY_MAX_CARD_PORTS
+#define MAX_TOTAL_PORTS CONFIG_FWTTY_MAX_TOTAL_PORTS
/* tuning parameters */
#define FWTTY_PORT_TXFIFO_LEN 4096
struct async_icount cprev, cnow; /* kernel counter temps */
void __user *argp = (void __user *)arg;
unsigned long flags;
+ DEFINE_WAIT(wait);
+ int ret;
if (serial_paranoia_check(info, tty->name, "rs_ioctl"))
return -ENODEV;
cprev = info->icount;
local_irq_restore(flags);
while (1) {
- interruptible_sleep_on(&info->tport.delta_msr_wait);
- /* see if a signal did it */
- if (signal_pending(current))
- return -ERESTARTSYS;
+ prepare_to_wait(&info->tport.delta_msr_wait,
+ &wait, TASK_INTERRUPTIBLE);
local_irq_save(flags);
cnow = info->icount; /* atomic copy */
local_irq_restore(flags);
if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
- cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
- return -EIO; /* no change => error */
+ cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
+ ret = -EIO; /* no change => error */
+ break;
+ }
if ( ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
- return 0;
+ ret = 0;
+ break;
+ }
+ schedule();
+ /* see if a signal did it */
+ if (signal_pending(current)) {
+ ret = -ERESTARTSYS;
+ break;
}
cprev = cnow;
}
- /* NOTREACHED */
+ finish_wait(&info->tport.delta_msr_wait, &wait);
+ return ret;
case TIOCSERGWILD:
case TIOCSERSWILD:
break;
#ifndef CONFIG_CYZ_INTR
case CYZSETPOLLCYCLE:
+ if (arg > LONG_MAX / HZ)
+ return -ENODEV;
cyz_polling_cycle = (arg * HZ) / 1000;
break;
case CYZGETPOLLCYCLE:
*/
#include <linux/console.h>
-#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/tty.h>
}
#ifdef CONFIG_CONSOLE_POLL
-int hvc_poll_init(struct tty_driver *driver, int line, char *options)
+static int hvc_poll_init(struct tty_driver *driver, int line, char *options)
{
return 0;
}
#include <linux/types.h>
-#include <linux/init.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/console.h>
* Copyright (C) 2007 David Sterba
*/
-#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
struct gsm_mux {
struct tty_struct *tty; /* The tty our ldisc is bound to */
spinlock_t lock;
+ struct mutex mutex;
unsigned int num;
struct kref ref;
gsm_destroy_network(dlci);
mutex_unlock(&dlci->mutex);
- /* tty_vhangup needs the tty_lock, so unlock and
- relock after doing the hangup. */
- tty_unlock(tty);
tty_vhangup(tty);
- tty_lock(tty);
+
tty_port_tty_set(&dlci->port, NULL);
tty_kref_put(tty);
}
* and then shut down each device hanging up the channels as we go.
*/
-void gsm_cleanup_mux(struct gsm_mux *gsm)
+static void gsm_cleanup_mux(struct gsm_mux *gsm)
{
int i;
struct gsm_dlci *dlci = gsm->dlci[0];
dlci->state == DLCI_CLOSED);
}
/* Free up any link layer users */
+ mutex_lock(&gsm->mutex);
for (i = 0; i < NUM_DLCI; i++)
if (gsm->dlci[i])
gsm_dlci_release(gsm->dlci[i]);
+ mutex_unlock(&gsm->mutex);
/* Now wipe the queues */
list_for_each_entry_safe(txq, ntxq, &gsm->tx_list, list)
kfree(txq);
INIT_LIST_HEAD(&gsm->tx_list);
}
-EXPORT_SYMBOL_GPL(gsm_cleanup_mux);
/**
* gsm_activate_mux - generic GSM setup
* finally kick off connecting to DLCI 0 on the modem.
*/
-int gsm_activate_mux(struct gsm_mux *gsm)
+static int gsm_activate_mux(struct gsm_mux *gsm)
{
struct gsm_dlci *dlci;
int i = 0;
gsm->dead = 0; /* Tty opens are now permissible */
return 0;
}
-EXPORT_SYMBOL_GPL(gsm_activate_mux);
/**
* gsm_free_mux - free up a mux
*
* Dispose of allocated resources for a dead mux
*/
-void gsm_free_mux(struct gsm_mux *gsm)
+static void gsm_free_mux(struct gsm_mux *gsm)
{
kfree(gsm->txframe);
kfree(gsm->buf);
kfree(gsm);
}
-EXPORT_SYMBOL_GPL(gsm_free_mux);
/**
* gsm_free_muxr - free up a mux
* Creates a new mux ready for activation.
*/
-struct gsm_mux *gsm_alloc_mux(void)
+static struct gsm_mux *gsm_alloc_mux(void)
{
struct gsm_mux *gsm = kzalloc(sizeof(struct gsm_mux), GFP_KERNEL);
if (gsm == NULL)
return NULL;
}
spin_lock_init(&gsm->lock);
+ mutex_init(&gsm->mutex);
kref_init(&gsm->ref);
INIT_LIST_HEAD(&gsm->tx_list);
return gsm;
}
-EXPORT_SYMBOL_GPL(gsm_alloc_mux);
/**
* gsmld_output - write to link
char *f;
int i;
char buf[64];
- char flags;
+ char flags = TTY_NORMAL;
if (debug & 4)
print_hex_dump_bytes("gsmld_receive: ", DUMP_PREFIX_OFFSET,
cp, count);
for (i = count, dp = cp, f = fp; i; i--, dp++) {
- flags = *f++;
+ if (f)
+ flags = *f++;
switch (flags) {
case TTY_NORMAL:
gsm->receive(gsm, *dp);
return;
}
-int gsm_change_mtu(struct net_device *net, int new_mtu)
+static 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))
This is ok from a locking
perspective as we don't have to worry about this
if DLCI0 is lost */
- if (gsm->dlci[0] && gsm->dlci[0]->state != DLCI_OPEN)
+ mutex_lock(&gsm->mutex);
+ if (gsm->dlci[0] && gsm->dlci[0]->state != DLCI_OPEN) {
+ mutex_unlock(&gsm->mutex);
return -EL2NSYNC;
+ }
dlci = gsm->dlci[line];
if (dlci == NULL) {
alloc = true;
dlci = gsm_dlci_alloc(gsm, line);
}
- if (dlci == NULL)
+ if (dlci == NULL) {
+ mutex_unlock(&gsm->mutex);
return -ENOMEM;
+ }
ret = tty_port_install(&dlci->port, driver, tty);
if (ret) {
if (alloc)
dlci_put(dlci);
+ mutex_unlock(&gsm->mutex);
return ret;
}
+ dlci_get(dlci);
+ dlci_get(gsm->dlci[0]);
+ mux_get(gsm);
tty->driver_data = dlci;
+ mutex_unlock(&gsm->mutex);
return 0;
}
struct tty_port *port = &dlci->port;
port->count++;
- dlci_get(dlci);
- dlci_get(dlci->gsm->dlci[0]);
- mux_get(dlci->gsm);
tty_port_tty_set(port, tty);
dlci->modem_rx = 0;
mutex_unlock(&dlci->mutex);
gsm = dlci->gsm;
if (tty_port_close_start(&dlci->port, tty, filp) == 0)
- goto out;
+ return;
gsm_dlci_begin_close(dlci);
if (test_bit(ASYNCB_INITIALIZED, &dlci->port.flags)) {
if (C_HUPCL(tty))
}
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);
+ return;
}
static void gsmtty_hangup(struct tty_struct *tty)
return gsmtty_modem_update(dlci, encode);
}
+static void gsmtty_remove(struct tty_driver *driver, struct tty_struct *tty)
+{
+ struct gsm_dlci *dlci = tty->driver_data;
+ struct gsm_mux *gsm = dlci->gsm;
+
+ dlci_put(dlci);
+ dlci_put(gsm->dlci[0]);
+ mux_put(gsm);
+ driver->ttys[tty->index] = NULL;
+}
/* Virtual ttys for the demux */
static const struct tty_operations gsmtty_ops = {
.tiocmget = gsmtty_tiocmget,
.tiocmset = gsmtty_tiocmset,
.break_ctl = gsmtty_break_ctl,
+ .remove = gsmtty_remove,
};
{
struct r3964_info *pInfo = tty->disc_data;
const unsigned char *p;
- char *f, flags = 0;
+ char *f, flags = TTY_NORMAL;
int i;
for (i = count, p = cp, f = fp; i; i--, p++) {
/* must hold exclusive termios_rwsem to reset these */
unsigned char lnext:1, erasing:1, raw:1, real_raw:1, icanon:1;
+ unsigned char push:1;
/* shared by producer and consumer */
char read_buf[N_TTY_BUF_SIZE];
return;
n_tty_set_room(tty);
n_tty_write_wakeup(tty->link);
- wake_up_interruptible_poll(&tty->link->write_wait, POLLOUT);
+ if (waitqueue_active(&tty->link->write_wait))
+ wake_up_interruptible_poll(&tty->link->write_wait, POLLOUT);
return;
}
ldata->erasing = 0;
bitmap_zero(ldata->read_flags, N_TTY_BUF_SIZE);
+ ldata->push = 0;
}
static void n_tty_packet_mode_flush(struct tty_struct *tty)
spin_lock_irqsave(&tty->ctrl_lock, flags);
if (tty->link->packet) {
tty->ctrl_status |= TIOCPKT_FLUSHREAD;
- wake_up_interruptible(&tty->link->read_wait);
+ if (waitqueue_active(&tty->link->read_wait))
+ wake_up_interruptible(&tty->link->read_wait);
}
spin_unlock_irqrestore(&tty->ctrl_lock, flags);
}
put_tty_queue('\0', ldata);
}
put_tty_queue('\0', ldata);
- wake_up_interruptible(&tty->read_wait);
+ if (waitqueue_active(&tty->read_wait))
+ wake_up_interruptible(&tty->read_wait);
}
/**
put_tty_queue('\0', ldata);
else
put_tty_queue(c, ldata);
- wake_up_interruptible(&tty->read_wait);
+ if (waitqueue_active(&tty->read_wait))
+ wake_up_interruptible(&tty->read_wait);
}
static void
n_tty_receive_char_special(struct tty_struct *tty, unsigned char c)
{
struct n_tty_data *ldata = tty->disc_data;
- int parmrk;
if (I_IXON(tty)) {
if (c == START_CHAR(tty)) {
}
if ((c == EOL_CHAR(tty)) ||
(c == EOL2_CHAR(tty) && L_IEXTEN(tty))) {
- parmrk = (c == (unsigned char) '\377' && I_PARMRK(tty))
- ? 1 : 0;
/*
* XXX are EOL_CHAR and EOL2_CHAR echoed?!?
*/
* XXX does PARMRK doubling happen for
* EOL_CHAR and EOL2_CHAR?
*/
- if (parmrk)
+ if (c == (unsigned char) '\377' && I_PARMRK(tty))
put_tty_queue(c, ldata);
handle_newline:
}
}
- parmrk = (c == (unsigned char) '\377' && I_PARMRK(tty)) ? 1 : 0;
if (L_ECHO(tty)) {
finish_erasing(ldata);
if (c == '\n')
commit_echoes(tty);
}
- if (parmrk)
+ /* PARMRK doubling check */
+ if (c == (unsigned char) '\377' && I_PARMRK(tty))
put_tty_queue(c, ldata);
put_tty_queue(c, ldata);
n_tty_receive_char_inline(struct tty_struct *tty, unsigned char c)
{
struct n_tty_data *ldata = tty->disc_data;
- int parmrk;
if (tty->stopped && !tty->flow_stopped && I_IXON(tty) && I_IXANY(tty)) {
start_tty(tty);
echo_char(c, tty);
commit_echoes(tty);
}
- parmrk = (c == (unsigned char) '\377' && I_PARMRK(tty)) ? 1 : 0;
- if (parmrk)
+ /* PARMRK doubling check */
+ if (c == (unsigned char) '\377' && I_PARMRK(tty))
put_tty_queue(c, ldata);
put_tty_queue(c, ldata);
}
-static inline void n_tty_receive_char(struct tty_struct *tty, unsigned char c)
+static void n_tty_receive_char(struct tty_struct *tty, unsigned char c)
{
n_tty_receive_char_inline(tty, c);
}
put_tty_queue(c, ldata);
}
-static inline void
-n_tty_receive_char_closing(struct tty_struct *tty, unsigned char c)
+static void n_tty_receive_char_closing(struct tty_struct *tty, unsigned char c)
{
if (I_ISTRIP(tty))
c &= 0x7f;
}
}
-static void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp,
- char *fp, int count)
-{
- int room, n;
-
- down_read(&tty->termios_rwsem);
-
- while (1) {
- room = receive_room(tty);
- n = min(count, room);
- if (!n)
- break;
- __receive_buf(tty, cp, fp, n);
- cp += n;
- if (fp)
- fp += n;
- count -= n;
- }
-
- tty->receive_room = room;
- n_tty_check_throttle(tty);
- up_read(&tty->termios_rwsem);
-}
-
-static int n_tty_receive_buf2(struct tty_struct *tty, const unsigned char *cp,
- char *fp, int count)
+static int
+n_tty_receive_buf_common(struct tty_struct *tty, const unsigned char *cp,
+ char *fp, int count, int flow)
{
struct n_tty_data *ldata = tty->disc_data;
int room, n, rcvd = 0;
room = receive_room(tty);
n = min(count, room);
if (!n) {
- if (!room)
+ if (flow && !room)
ldata->no_room = 1;
break;
}
return rcvd;
}
+static void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp,
+ char *fp, int count)
+{
+ n_tty_receive_buf_common(tty, cp, fp, count, 0);
+}
+
+static int n_tty_receive_buf2(struct tty_struct *tty, const unsigned char *cp,
+ char *fp, int count)
+{
+ return n_tty_receive_buf_common(tty, cp, fp, count, 1);
+}
+
int is_ignored(int sig)
{
return (sigismember(¤t->blocked, sig) ||
if (!old || (old->c_lflag ^ tty->termios.c_lflag) & ICANON) {
bitmap_zero(ldata->read_flags, N_TTY_BUF_SIZE);
- ldata->line_start = ldata->canon_head = ldata->read_tail;
+ ldata->line_start = ldata->read_tail;
+ if (!L_ICANON(tty) || !read_cnt(ldata)) {
+ ldata->canon_head = ldata->read_tail;
+ ldata->push = 0;
+ } else {
+ set_bit((ldata->read_head - 1) & (N_TTY_BUF_SIZE - 1),
+ ldata->read_flags);
+ ldata->canon_head = ldata->read_head;
+ ldata->push = 1;
+ }
ldata->erasing = 0;
ldata->lnext = 0;
}
start_tty(tty);
/* The termios change make the tty ready for I/O */
- wake_up_interruptible(&tty->write_wait);
- wake_up_interruptible(&tty->read_wait);
+ if (waitqueue_active(&tty->write_wait))
+ wake_up_interruptible(&tty->write_wait);
+ if (waitqueue_active(&tty->read_wait))
+ wake_up_interruptible(&tty->read_wait);
}
/**
return -ENOMEM;
}
-static inline int input_available_p(struct tty_struct *tty, int amt)
+static inline int input_available_p(struct tty_struct *tty, int poll)
{
struct n_tty_data *ldata = tty->disc_data;
+ int amt = poll && !TIME_CHAR(tty) ? MIN_CHAR(tty) : 1;
if (ldata->icanon && !L_EXTPROC(tty)) {
if (ldata->canon_head != ldata->read_tail)
return 1;
- } else if (read_cnt(ldata) >= (amt ? amt : 1))
+ } else if (read_cnt(ldata) >= amt)
return 1;
return 0;
* it copies one line of input up to and including the line-delimiting
* character into the user-space buffer.
*
+ * NB: When termios is changed from non-canonical to canonical mode and
+ * the read buffer contains data, n_tty_set_termios() simulates an EOF
+ * push (as if C-d were input) _without_ the DISABLED_CHAR in the buffer.
+ * This causes data already processed as input to be immediately available
+ * as input although a newline has not been received.
+ *
* Called under the atomic_read_lock mutex
*
* n_tty_read()/consumer path:
n += found;
c = n;
- if (found && read_buf(ldata, eol) == __DISABLED_CHAR) {
+ if (found && !ldata->push && read_buf(ldata, eol) == __DISABLED_CHAR) {
n--;
eof_push = !n && ldata->read_tail != ldata->line_start;
}
ldata->read_tail += c;
if (found) {
- ldata->line_start = ldata->read_tail;
+ if (!ldata->push)
+ ldata->line_start = ldata->read_tail;
+ else
+ ldata->push = 0;
tty_audit_push(tty);
}
return eof_push ? -EAGAIN : 0;
poll_wait(file, &tty->read_wait, wait);
poll_wait(file, &tty->write_wait, wait);
- if (input_available_p(tty, TIME_CHAR(tty) ? 0 : MIN_CHAR(tty)))
+ if (input_available_p(tty, 1))
mask |= POLLIN | POLLRDNORM;
if (tty->packet && tty->link->ctrl_status)
mask |= POLLPRI | POLLIN | POLLRDNORM;
#ifdef CONFIG_PCI
-static DEFINE_PCI_DEVICE_TABLE(rocket_pci_ids) = {
+static const struct pci_device_id rocket_pci_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_RP, PCI_DEVICE_ID_RP4QUAD) },
{ PCI_DEVICE(PCI_VENDOR_ID_RP, PCI_DEVICE_ID_RP8OCTA) },
{ PCI_DEVICE(PCI_VENDOR_ID_RP, PCI_DEVICE_ID_URP8OCTA) },
if (port->type == PORT_16550A && port->iotype == UPIO_AU)
up->bugs |= UART_BUG_NOMSR;
+ /* HW bugs may trigger IRQ while IIR == NO_INT */
+ if (port->type == PORT_TEGRA)
+ up->bugs |= UART_BUG_NOMSR;
+
if (port->type != PORT_UNKNOWN && flags & UART_CONFIG_IRQ)
autoconfig_irq(up);
* raised, the LCR needs to be rewritten and the uart status register read.
*/
#include <linux/device.h>
-#include <linux/init.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/serial_8250.h>
return 0;
}
-#ifdef CONFIG_ACPI
static int dw8250_probe_acpi(struct uart_8250_port *up,
struct dw8250_data *data)
{
return 0;
}
-#else
-static inline int dw8250_probe_acpi(struct uart_8250_port *up,
- struct dw8250_data *data)
-{
- return -ENODEV;
-}
-#endif /* CONFIG_ACPI */
static int dw8250_probe(struct platform_device *pdev)
{
*/
#include <linux/device.h>
-#include <linux/init.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/serial_8250.h>
*/
#undef DEBUG
#include <linux/module.h>
-#include <linux/init.h>
#include <linux/pci.h>
#include <linux/string.h>
#include <linux/kernel.h>
unsigned long base = pci_resource_start(dev, 0);
if (base) {
u32 tmp;
- outl(inl(base + 0x38), base + 0x38);
+ outl(inl(base + 0x38) | 0x00002000, base + 0x38);
tmp = inl(base + 0x3c);
outl(tmp | 0x01000000, base + 0x3c);
- outl(tmp, base + 0x3c);
+ outl(tmp &= ~0x01000000, base + 0x3c);
}
}
return 0;
#define PCI_DEVICE_ID_TITAN_800E 0xA014
#define PCI_DEVICE_ID_TITAN_200EI 0xA016
#define PCI_DEVICE_ID_TITAN_200EISI 0xA017
+#define PCI_DEVICE_ID_TITAN_200V3 0xA306
#define PCI_DEVICE_ID_TITAN_400V3 0xA310
#define PCI_DEVICE_ID_TITAN_410V3 0xA312
#define PCI_DEVICE_ID_TITAN_800V3 0xA314
{ PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_200EISI,
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
pbn_oxsemi_2_4000000 },
+ { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_200V3,
+ PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+ pbn_b0_bt_2_921600 },
{ PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_400V3,
PCI_ANY_ID, PCI_ANY_ID, 0, 0,
pbn_b0_4_921600 },
* the Free Software Foundation; either version 2 of the License.
*/
#include <linux/module.h>
-#include <linux/init.h>
#include <linux/pci.h>
#include <linux/pnp.h>
#include <linux/string.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
-#include <linux/init.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/string.h>
config SERIAL_CLPS711X
tristate "CLPS711X serial port support"
- depends on ARCH_CLPS711X
+ depends on ARCH_CLPS711X || COMPILE_TEST
select SERIAL_CORE
- default y
help
This enables the driver for the on-chip UARTs of the Cirrus
Logic EP711x/EP721x/EP731x processors.
This driver supports the QE serial ports on Freescale embedded
PowerPC that contain a QUICC Engine.
-config SERIAL_SC26XX
- tristate "SC2681/SC2692 serial port support"
- depends on SNI_RM
- select SERIAL_CORE
- help
- This is a driver for the onboard serial ports of
- older RM400 machines.
-
-config SERIAL_SC26XX_CONSOLE
- bool "Console on SC2681/SC2692 serial port"
- depends on SERIAL_SC26XX=y
- select SERIAL_CORE_CONSOLE
- help
- Support for Console on SC2681/SC2692 serial ports.
-
config SERIAL_SCCNXP
tristate "SCCNXP serial port support"
- depends on !SERIAL_SC26XX
select SERIAL_CORE
- default n
help
This selects support for an advanced UART from NXP (Philips).
Supported ICs are SCC2681, SCC2691, SCC2692, SC28L91, SC28L92,
SC28L202, SCC68681 and SCC68692.
- Positioned as a replacement for the driver SC26XX.
config SERIAL_SCCNXP_CONSOLE
bool "Console on SCCNXP serial port"
obj-$(CONFIG_SERIAL_MPSC) += mpsc.o
obj-$(CONFIG_SERIAL_SB1250_DUART) += sb1250-duart.o
obj-$(CONFIG_ETRAX_SERIAL) += crisv10.o
-obj-$(CONFIG_SERIAL_SC26XX) += sc26xx.o
obj-$(CONFIG_SERIAL_SCCNXP) += sccnxp.o
obj-$(CONFIG_SERIAL_JSM) += jsm/
obj-$(CONFIG_SERIAL_TXX9) += serial_txx9.o
return 0;
}
-static int pl010_suspend(struct amba_device *dev, pm_message_t state)
+#ifdef CONFIG_PM_SLEEP
+static int pl010_suspend(struct device *dev)
{
- struct uart_amba_port *uap = amba_get_drvdata(dev);
+ struct uart_amba_port *uap = dev_get_drvdata(dev);
if (uap)
uart_suspend_port(&amba_reg, &uap->port);
return 0;
}
-static int pl010_resume(struct amba_device *dev)
+static int pl010_resume(struct device *dev)
{
- struct uart_amba_port *uap = amba_get_drvdata(dev);
+ struct uart_amba_port *uap = dev_get_drvdata(dev);
if (uap)
uart_resume_port(&amba_reg, &uap->port);
return 0;
}
+#endif
+
+static SIMPLE_DEV_PM_OPS(pl010_dev_pm_ops, pl010_suspend, pl010_resume);
static struct amba_id pl010_ids[] = {
{
static struct amba_driver pl010_driver = {
.drv = {
.name = "uart-pl010",
+ .pm = &pl010_dev_pm_ops,
},
.id_table = pl010_ids,
.probe = pl010_probe,
.remove = pl010_remove,
- .suspend = pl010_suspend,
- .resume = pl010_resume,
};
static int __init pl010_init(void)
.get_fifosize = get_fifosize_st,
};
-static struct uart_amba_port *amba_ports[UART_NR];
-
/* Deals with DMA transactions */
struct pl011_sgbuf {
spin_lock_irqsave(&uap->port.lock, flags);
pl011_dma_rx_stop(uap);
+ uap->im |= UART011_RXIM;
+ writew(uap->im, uap->port.membase + UART011_IMSC);
spin_unlock_irqrestore(&uap->port.lock, flags);
uap->dmarx.running = false;
dev_dbg(uap->port.dev, "could not trigger RX DMA job "
"fall back to interrupt mode again\n");
uap->im |= UART011_RXIM;
+ writew(uap->im, uap->port.membase + UART011_IMSC);
} else {
- uap->im &= ~UART011_RXIM;
#ifdef CONFIG_DMA_ENGINE
/* Start Rx DMA poll */
if (uap->dmarx.poll_rate) {
}
#endif
}
-
- writew(uap->im, uap->port.membase + UART011_IMSC);
}
spin_lock(&uap->port.lock);
}
return retval;
}
+static void pl011_write_lcr_h(struct uart_amba_port *uap, unsigned int lcr_h)
+{
+ writew(lcr_h, uap->port.membase + uap->lcrh_rx);
+ if (uap->lcrh_rx != uap->lcrh_tx) {
+ int i;
+ /*
+ * Wait 10 PCLKs before writing LCRH_TX register,
+ * to get this delay write read only register 10 times
+ */
+ for (i = 0; i < 10; ++i)
+ writew(0xff, uap->port.membase + UART011_MIS);
+ writew(lcr_h, uap->port.membase + uap->lcrh_tx);
+ }
+}
+
static int pl011_startup(struct uart_port *port)
{
struct uart_amba_port *uap = (struct uart_amba_port *)port;
- unsigned int cr;
+ unsigned int cr, lcr_h, fbrd, ibrd;
int retval;
retval = pl011_hwinit(port);
writew(uap->vendor->ifls, uap->port.membase + UART011_IFLS);
/*
- * Provoke TX FIFO interrupt into asserting.
+ * Provoke TX FIFO interrupt into asserting. Taking care to preserve
+ * baud rate and data format specified by FBRD, IBRD and LCRH as the
+ * UART may already be in use as a console.
*/
+ spin_lock_irq(&uap->port.lock);
+
+ fbrd = readw(uap->port.membase + UART011_FBRD);
+ ibrd = readw(uap->port.membase + UART011_IBRD);
+ lcr_h = readw(uap->port.membase + uap->lcrh_rx);
+
cr = UART01x_CR_UARTEN | UART011_CR_TXE | UART011_CR_LBE;
writew(cr, uap->port.membase + UART011_CR);
writew(0, uap->port.membase + UART011_FBRD);
writew(1, uap->port.membase + UART011_IBRD);
- writew(0, uap->port.membase + uap->lcrh_rx);
- if (uap->lcrh_tx != uap->lcrh_rx) {
- int i;
- /*
- * Wait 10 PCLKs before writing LCRH_TX register,
- * to get this delay write read only register 10 times
- */
- for (i = 0; i < 10; ++i)
- writew(0xff, uap->port.membase + UART011_MIS);
- writew(0, uap->port.membase + uap->lcrh_tx);
- }
+ pl011_write_lcr_h(uap, 0);
writew(0, uap->port.membase + UART01x_DR);
while (readw(uap->port.membase + UART01x_FR) & UART01x_FR_BUSY)
barrier();
+ writew(fbrd, uap->port.membase + UART011_FBRD);
+ writew(ibrd, uap->port.membase + UART011_IBRD);
+ pl011_write_lcr_h(uap, lcr_h);
+
/* restore RTS and DTR */
cr = uap->old_cr & (UART011_CR_RTS | UART011_CR_DTR);
cr |= UART01x_CR_UARTEN | UART011_CR_RXE | UART011_CR_TXE;
writew(cr, uap->port.membase + UART011_CR);
+ spin_unlock_irq(&uap->port.lock);
+
/*
* initialise the old status of the modem signals
*/
* it during startup().
*/
uap->autorts = false;
+ spin_lock_irq(&uap->port.lock);
cr = readw(uap->port.membase + UART011_CR);
uap->old_cr = cr;
cr &= UART011_CR_RTS | UART011_CR_DTR;
cr |= UART01x_CR_UARTEN | UART011_CR_TXE;
writew(cr, uap->port.membase + UART011_CR);
+ spin_unlock_irq(&uap->port.lock);
/*
* disable break condition and fifos
* UART011_FBRD & UART011_IBRD.
* ----------^----------^----------^----------^-----
*/
- writew(lcr_h, port->membase + uap->lcrh_rx);
- if (uap->lcrh_rx != uap->lcrh_tx) {
- int i;
- /*
- * Wait 10 PCLKs before writing LCRH_TX register,
- * to get this delay write read only register 10 times
- */
- for (i = 0; i < 10; ++i)
- writew(0xff, uap->port.membase + UART011_MIS);
- writew(lcr_h, port->membase + uap->lcrh_tx);
- }
+ pl011_write_lcr_h(uap, lcr_h);
writew(old_cr, port->membase + UART011_CR);
spin_unlock_irqrestore(&port->lock, flags);
return 0;
}
-#ifdef CONFIG_PM
-static int pl011_suspend(struct amba_device *dev, pm_message_t state)
+#ifdef CONFIG_PM_SLEEP
+static int pl011_suspend(struct device *dev)
{
- struct uart_amba_port *uap = amba_get_drvdata(dev);
+ struct uart_amba_port *uap = dev_get_drvdata(dev);
if (!uap)
return -EINVAL;
return uart_suspend_port(&amba_reg, &uap->port);
}
-static int pl011_resume(struct amba_device *dev)
+static int pl011_resume(struct device *dev)
{
- struct uart_amba_port *uap = amba_get_drvdata(dev);
+ struct uart_amba_port *uap = dev_get_drvdata(dev);
if (!uap)
return -EINVAL;
}
#endif
+static SIMPLE_DEV_PM_OPS(pl011_dev_pm_ops, pl011_suspend, pl011_resume);
+
static struct amba_id pl011_ids[] = {
{
.id = 0x00041011,
static struct amba_driver pl011_driver = {
.drv = {
.name = "uart-pl011",
+ .pm = &pl011_dev_pm_ops,
},
.id_table = pl011_ids,
.probe = pl011_probe,
.remove = pl011_remove,
-#ifdef CONFIG_PM
- .suspend = pl011_suspend,
- .resume = pl011_resume,
-#endif
};
static int __init pl011_init(void)
atmel_port->desc_rx = NULL;
atmel_port->chan_rx = NULL;
atmel_port->cookie_rx = -EINVAL;
-
- if (!atmel_port->is_usart)
- del_timer_sync(&atmel_port->uart_timer);
}
static void atmel_rx_from_dma(struct uart_port *port)
DMA_FROM_DEVICE);
kfree(pdc->buf);
}
-
- if (!atmel_port->is_usart)
- del_timer_sync(&atmel_port->uart_timer);
}
static void atmel_rx_from_pdc(struct uart_port *port)
/* enable xmit & rcvr */
UART_PUT_CR(port, ATMEL_US_TXEN | ATMEL_US_RXEN);
+ setup_timer(&atmel_port->uart_timer,
+ atmel_uart_timer_callback,
+ (unsigned long)port);
+
if (atmel_use_pdc_rx(port)) {
/* set UART timeout */
if (!atmel_port->is_usart) {
- setup_timer(&atmel_port->uart_timer,
- atmel_uart_timer_callback,
- (unsigned long)port);
mod_timer(&atmel_port->uart_timer,
jiffies + uart_poll_timeout(port));
/* set USART timeout */
} else if (atmel_use_dma_rx(port)) {
/* set UART timeout */
if (!atmel_port->is_usart) {
- setup_timer(&atmel_port->uart_timer,
- atmel_uart_timer_callback,
- (unsigned long)port);
mod_timer(&atmel_port->uart_timer,
jiffies + uart_poll_timeout(port));
/* set USART timeout */
static void atmel_shutdown(struct uart_port *port)
{
struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
+
/*
- * Ensure everything is stopped.
+ * Prevent any tasklets being scheduled during
+ * cleanup
+ */
+ del_timer_sync(&atmel_port->uart_timer);
+
+ /*
+ * Clear out any scheduled tasklets before
+ * we destroy the buffers
+ */
+ tasklet_kill(&atmel_port->tasklet);
+
+ /*
+ * Ensure everything is stopped and
+ * disable all interrupts, port and break condition.
*/
atmel_stop_rx(port);
atmel_stop_tx(port);
+ UART_PUT_CR(port, ATMEL_US_RSTSTA);
+ UART_PUT_IDR(port, -1);
+
+
/*
* Shut-down the DMA.
*/
atmel_port->release_tx(port);
/*
- * Disable all interrupts, port and break condition.
+ * Reset ring buffer pointers
*/
- UART_PUT_CR(port, ATMEL_US_RSTSTA);
- UART_PUT_IDR(port, -1);
+ atmel_port->rx_ring.head = 0;
+ atmel_port->rx_ring.tail = 0;
/*
* Free the interrupt
struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
int ret = 0;
+ tasklet_kill(&atmel_port->tasklet);
+
device_init_wakeup(&pdev->dev, 0);
ret = uart_remove_one_port(&atmel_uart, port);
- tasklet_kill(&atmel_port->tasklet);
kfree(atmel_port->rx_ring.buf);
/* "port" is allocated statically, so we shouldn't free it */
#include <linux/console.h>
#include <linux/serial_core.h>
#include <linux/serial.h>
-#include <linux/io.h>
#include <linux/clk.h>
+#include <linux/io.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/ioport.h>
+#include <linux/of.h>
#include <linux/platform_device.h>
+#include <linux/regmap.h>
-#include <mach/hardware.h>
+#include <linux/mfd/syscon.h>
+#include <linux/mfd/syscon/clps711x.h>
-#define UART_CLPS711X_NAME "uart-clps711x"
+#define UART_CLPS711X_DEVNAME "ttyCL"
#define UART_CLPS711X_NR 2
#define UART_CLPS711X_MAJOR 204
#define UART_CLPS711X_MINOR 40
-#define UBRLCR(port) ((port)->line ? UBRLCR2 : UBRLCR1)
-#define UARTDR(port) ((port)->line ? UARTDR2 : UARTDR1)
-#define SYSFLG(port) ((port)->line ? SYSFLG2 : SYSFLG1)
-#define SYSCON(port) ((port)->line ? SYSCON2 : SYSCON1)
-#define TX_IRQ(port) ((port)->line ? IRQ_UTXINT2 : IRQ_UTXINT1)
-#define RX_IRQ(port) ((port)->line ? IRQ_URXINT2 : IRQ_URXINT1)
+#define UARTDR_OFFSET (0x00)
+#define UBRLCR_OFFSET (0x40)
+
+#define UARTDR_FRMERR (1 << 8)
+#define UARTDR_PARERR (1 << 9)
+#define UARTDR_OVERR (1 << 10)
+
+#define UBRLCR_BAUD_MASK ((1 << 12) - 1)
+#define UBRLCR_BREAK (1 << 12)
+#define UBRLCR_PRTEN (1 << 13)
+#define UBRLCR_EVENPRT (1 << 14)
+#define UBRLCR_XSTOP (1 << 15)
+#define UBRLCR_FIFOEN (1 << 16)
+#define UBRLCR_WRDLEN5 (0 << 17)
+#define UBRLCR_WRDLEN6 (1 << 17)
+#define UBRLCR_WRDLEN7 (2 << 17)
+#define UBRLCR_WRDLEN8 (3 << 17)
+#define UBRLCR_WRDLEN_MASK (3 << 17)
struct clps711x_port {
- struct uart_driver uart;
- struct clk *uart_clk;
- struct uart_port port[UART_CLPS711X_NR];
- int tx_enabled[UART_CLPS711X_NR];
-#ifdef CONFIG_SERIAL_CLPS711X_CONSOLE
- struct console console;
-#endif
+ struct uart_port port;
+ unsigned int tx_enabled;
+ int rx_irq;
+ struct regmap *syscon;
+ bool use_ms;
+};
+
+static struct uart_driver clps711x_uart = {
+ .owner = THIS_MODULE,
+ .driver_name = UART_CLPS711X_DEVNAME,
+ .dev_name = UART_CLPS711X_DEVNAME,
+ .major = UART_CLPS711X_MAJOR,
+ .minor = UART_CLPS711X_MINOR,
+ .nr = UART_CLPS711X_NR,
};
static void uart_clps711x_stop_tx(struct uart_port *port)
{
struct clps711x_port *s = dev_get_drvdata(port->dev);
- if (s->tx_enabled[port->line]) {
- disable_irq(TX_IRQ(port));
- s->tx_enabled[port->line] = 0;
+ if (s->tx_enabled) {
+ disable_irq(port->irq);
+ s->tx_enabled = 0;
}
}
{
struct clps711x_port *s = dev_get_drvdata(port->dev);
- if (!s->tx_enabled[port->line]) {
- enable_irq(TX_IRQ(port));
- s->tx_enabled[port->line] = 1;
+ if (!s->tx_enabled) {
+ s->tx_enabled = 1;
+ enable_irq(port->irq);
}
}
-static void uart_clps711x_stop_rx(struct uart_port *port)
-{
- disable_irq(RX_IRQ(port));
-}
-
-static void uart_clps711x_enable_ms(struct uart_port *port)
-{
- /* Do nothing */
-}
-
static irqreturn_t uart_clps711x_int_rx(int irq, void *dev_id)
{
struct uart_port *port = dev_id;
- unsigned int status, ch, flg;
+ struct clps711x_port *s = dev_get_drvdata(port->dev);
+ unsigned int status, flg;
+ u16 ch;
for (;;) {
- status = clps_readl(SYSFLG(port));
- if (status & SYSFLG_URXFE)
+ u32 sysflg = 0;
+
+ regmap_read(s->syscon, SYSFLG_OFFSET, &sysflg);
+ if (sysflg & SYSFLG_URXFE)
break;
- ch = clps_readw(UARTDR(port));
+ ch = readw(port->membase + UARTDR_OFFSET);
status = ch & (UARTDR_FRMERR | UARTDR_PARERR | UARTDR_OVERR);
ch &= 0xff;
struct circ_buf *xmit = &port->state->xmit;
if (port->x_char) {
- clps_writew(port->x_char, UARTDR(port));
+ writew(port->x_char, port->membase + UARTDR_OFFSET);
port->icount.tx++;
port->x_char = 0;
return IRQ_HANDLED;
}
if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
- disable_irq_nosync(TX_IRQ(port));
- s->tx_enabled[port->line] = 0;
+ if (s->tx_enabled) {
+ disable_irq_nosync(port->irq);
+ s->tx_enabled = 0;
+ }
return IRQ_HANDLED;
}
while (!uart_circ_empty(xmit)) {
- clps_writew(xmit->buf[xmit->tail], UARTDR(port));
+ u32 sysflg = 0;
+
+ writew(xmit->buf[xmit->tail], port->membase + UARTDR_OFFSET);
xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
port->icount.tx++;
- if (clps_readl(SYSFLG(port) & SYSFLG_UTXFF))
+
+ regmap_read(s->syscon, SYSFLG_OFFSET, &sysflg);
+ if (sysflg & SYSFLG_UTXFF)
break;
}
static unsigned int uart_clps711x_tx_empty(struct uart_port *port)
{
- return (clps_readl(SYSFLG(port) & SYSFLG_UBUSY)) ? 0 : TIOCSER_TEMT;
+ struct clps711x_port *s = dev_get_drvdata(port->dev);
+ u32 sysflg = 0;
+
+ regmap_read(s->syscon, SYSFLG_OFFSET, &sysflg);
+
+ return (sysflg & SYSFLG_UBUSY) ? 0 : TIOCSER_TEMT;
}
static unsigned int uart_clps711x_get_mctrl(struct uart_port *port)
{
- unsigned int status, result = 0;
+ struct clps711x_port *s = dev_get_drvdata(port->dev);
+ unsigned int result = 0;
+
+ if (s->use_ms) {
+ u32 sysflg = 0;
- if (port->line == 0) {
- status = clps_readl(SYSFLG1);
- if (status & SYSFLG1_DCD)
+ regmap_read(s->syscon, SYSFLG_OFFSET, &sysflg);
+ if (sysflg & SYSFLG1_DCD)
result |= TIOCM_CAR;
- if (status & SYSFLG1_DSR)
+ if (sysflg & SYSFLG1_DSR)
result |= TIOCM_DSR;
- if (status & SYSFLG1_CTS)
+ if (sysflg & SYSFLG1_CTS)
result |= TIOCM_CTS;
} else
result = TIOCM_DSR | TIOCM_CTS | TIOCM_CAR;
static void uart_clps711x_break_ctl(struct uart_port *port, int break_state)
{
- unsigned long flags;
unsigned int ubrlcr;
- spin_lock_irqsave(&port->lock, flags);
-
- ubrlcr = clps_readl(UBRLCR(port));
+ ubrlcr = readl(port->membase + UBRLCR_OFFSET);
if (break_state)
ubrlcr |= UBRLCR_BREAK;
else
ubrlcr &= ~UBRLCR_BREAK;
- clps_writel(ubrlcr, UBRLCR(port));
+ writel(ubrlcr, port->membase + UBRLCR_OFFSET);
+}
+
+static void uart_clps711x_set_ldisc(struct uart_port *port, int ld)
+{
+ if (!port->line) {
+ struct clps711x_port *s = dev_get_drvdata(port->dev);
- spin_unlock_irqrestore(&port->lock, flags);
+ regmap_update_bits(s->syscon, SYSCON_OFFSET, SYSCON1_SIREN,
+ (ld == N_IRDA) ? SYSCON1_SIREN : 0);
+ }
}
static int uart_clps711x_startup(struct uart_port *port)
{
struct clps711x_port *s = dev_get_drvdata(port->dev);
- int ret;
-
- s->tx_enabled[port->line] = 1;
- /* Allocate the IRQs */
- ret = devm_request_irq(port->dev, TX_IRQ(port), uart_clps711x_int_tx,
- 0, UART_CLPS711X_NAME " TX", port);
- if (ret)
- return ret;
-
- ret = devm_request_irq(port->dev, RX_IRQ(port), uart_clps711x_int_rx,
- 0, UART_CLPS711X_NAME " RX", port);
- if (ret) {
- devm_free_irq(port->dev, TX_IRQ(port), port);
- return ret;
- }
/* Disable break */
- clps_writel(clps_readl(UBRLCR(port)) & ~UBRLCR_BREAK, UBRLCR(port));
+ writel(readl(port->membase + UBRLCR_OFFSET) & ~UBRLCR_BREAK,
+ port->membase + UBRLCR_OFFSET);
/* Enable the port */
- clps_writel(clps_readl(SYSCON(port)) | SYSCON_UARTEN, SYSCON(port));
-
- return 0;
+ return regmap_update_bits(s->syscon, SYSCON_OFFSET,
+ SYSCON_UARTEN, SYSCON_UARTEN);
}
static void uart_clps711x_shutdown(struct uart_port *port)
{
- /* Free the interrupts */
- devm_free_irq(port->dev, TX_IRQ(port), port);
- devm_free_irq(port->dev, RX_IRQ(port), port);
+ struct clps711x_port *s = dev_get_drvdata(port->dev);
/* Disable the port */
- clps_writel(clps_readl(SYSCON(port)) & ~SYSCON_UARTEN, SYSCON(port));
+ regmap_update_bits(s->syscon, SYSCON_OFFSET, SYSCON_UARTEN, 0);
}
static void uart_clps711x_set_termios(struct uart_port *port,
struct ktermios *termios,
struct ktermios *old)
{
- unsigned int ubrlcr, baud, quot;
- unsigned long flags;
+ u32 ubrlcr;
+ unsigned int baud, quot;
/* Mask termios capabilities we don't support */
termios->c_cflag &= ~CMSPAR;
/* Enable FIFO */
ubrlcr |= UBRLCR_FIFOEN;
- spin_lock_irqsave(&port->lock, flags);
-
/* Set read status mask */
port->read_status_mask = UARTDR_OVERR;
if (termios->c_iflag & INPCK)
uart_update_timeout(port, termios->c_cflag, baud);
- clps_writel(ubrlcr | (quot - 1), UBRLCR(port));
-
- spin_unlock_irqrestore(&port->lock, flags);
+ writel(ubrlcr | (quot - 1), port->membase + UBRLCR_OFFSET);
}
static const char *uart_clps711x_type(struct uart_port *port)
port->type = PORT_CLPS711X;
}
-static void uart_clps711x_release_port(struct uart_port *port)
+static void uart_clps711x_nop_void(struct uart_port *port)
{
- /* Do nothing */
}
-static int uart_clps711x_request_port(struct uart_port *port)
+static int uart_clps711x_nop_int(struct uart_port *port)
{
- /* Do nothing */
return 0;
}
.get_mctrl = uart_clps711x_get_mctrl,
.stop_tx = uart_clps711x_stop_tx,
.start_tx = uart_clps711x_start_tx,
- .stop_rx = uart_clps711x_stop_rx,
- .enable_ms = uart_clps711x_enable_ms,
+ .stop_rx = uart_clps711x_nop_void,
+ .enable_ms = uart_clps711x_nop_void,
.break_ctl = uart_clps711x_break_ctl,
+ .set_ldisc = uart_clps711x_set_ldisc,
.startup = uart_clps711x_startup,
.shutdown = uart_clps711x_shutdown,
.set_termios = uart_clps711x_set_termios,
.type = uart_clps711x_type,
.config_port = uart_clps711x_config_port,
- .release_port = uart_clps711x_release_port,
- .request_port = uart_clps711x_request_port,
+ .release_port = uart_clps711x_nop_void,
+ .request_port = uart_clps711x_nop_int,
};
#ifdef CONFIG_SERIAL_CLPS711X_CONSOLE
static void uart_clps711x_console_putchar(struct uart_port *port, int ch)
{
- while (clps_readl(SYSFLG(port)) & SYSFLG_UTXFF)
- barrier();
+ struct clps711x_port *s = dev_get_drvdata(port->dev);
+ u32 sysflg = 0;
+
+ do {
+ regmap_read(s->syscon, SYSFLG_OFFSET, &sysflg);
+ } while (sysflg & SYSFLG_UTXFF);
- clps_writew(ch, UARTDR(port));
+ writew(ch, port->membase + UARTDR_OFFSET);
}
static void uart_clps711x_console_write(struct console *co, const char *c,
unsigned n)
{
- struct clps711x_port *s = (struct clps711x_port *)co->data;
- struct uart_port *port = &s->port[co->index];
- u32 syscon;
-
- /* Ensure that the port is enabled */
- syscon = clps_readl(SYSCON(port));
- clps_writel(syscon | SYSCON_UARTEN, SYSCON(port));
+ struct uart_port *port = clps711x_uart.state[co->index].uart_port;
+ struct clps711x_port *s = dev_get_drvdata(port->dev);
+ u32 sysflg = 0;
uart_console_write(port, c, n, uart_clps711x_console_putchar);
/* Wait for transmitter to become empty */
- while (clps_readl(SYSFLG(port)) & SYSFLG_UBUSY)
- barrier();
-
- /* Restore the uart state */
- clps_writel(syscon, SYSCON(port));
+ do {
+ regmap_read(s->syscon, SYSFLG_OFFSET, &sysflg);
+ } while (sysflg & SYSFLG_UBUSY);
}
-static void uart_clps711x_console_get_options(struct uart_port *port,
- int *baud, int *parity,
- int *bits)
+static int uart_clps711x_console_setup(struct console *co, char *options)
{
- if (clps_readl(SYSCON(port)) & SYSCON_UARTEN) {
- unsigned int ubrlcr, quot;
+ int baud = 38400, bits = 8, parity = 'n', flow = 'n';
+ int ret, index = co->index;
+ struct clps711x_port *s;
+ struct uart_port *port;
+ unsigned int quot;
+ u32 ubrlcr;
- ubrlcr = clps_readl(UBRLCR(port));
+ if (index < 0 || index >= UART_CLPS711X_NR)
+ return -EINVAL;
- *parity = 'n';
- if (ubrlcr & UBRLCR_PRTEN) {
- if (ubrlcr & UBRLCR_EVENPRT)
- *parity = 'e';
- else
- *parity = 'o';
- }
+ port = clps711x_uart.state[index].uart_port;
+ if (!port)
+ return -ENODEV;
- if ((ubrlcr & UBRLCR_WRDLEN_MASK) == UBRLCR_WRDLEN7)
- *bits = 7;
- else
- *bits = 8;
+ s = dev_get_drvdata(port->dev);
- quot = ubrlcr & UBRLCR_BAUD_MASK;
- *baud = port->uartclk / (16 * (quot + 1));
- }
-}
+ if (!options) {
+ u32 syscon = 0;
-static int uart_clps711x_console_setup(struct console *co, char *options)
-{
- int baud = 38400, bits = 8, parity = 'n', flow = 'n';
- struct clps711x_port *s = (struct clps711x_port *)co->data;
- struct uart_port *port = &s->port[(co->index > 0) ? co->index : 0];
+ regmap_read(s->syscon, SYSCON_OFFSET, &syscon);
+ if (syscon & SYSCON_UARTEN) {
+ ubrlcr = readl(port->membase + UBRLCR_OFFSET);
+
+ if (ubrlcr & UBRLCR_PRTEN) {
+ if (ubrlcr & UBRLCR_EVENPRT)
+ parity = 'e';
+ else
+ parity = 'o';
+ }
+
+ if ((ubrlcr & UBRLCR_WRDLEN_MASK) == UBRLCR_WRDLEN7)
+ bits = 7;
- if (options)
+ quot = ubrlcr & UBRLCR_BAUD_MASK;
+ baud = port->uartclk / (16 * (quot + 1));
+ }
+ } else
uart_parse_options(options, &baud, &parity, &bits, &flow);
- else
- uart_clps711x_console_get_options(port, &baud, &parity, &bits);
- return uart_set_options(port, co, baud, parity, bits, flow);
+ ret = uart_set_options(port, co, baud, parity, bits, flow);
+ if (ret)
+ return ret;
+
+ return regmap_update_bits(s->syscon, SYSCON_OFFSET,
+ SYSCON_UARTEN, SYSCON_UARTEN);
}
+
+static struct console clps711x_console = {
+ .name = UART_CLPS711X_DEVNAME,
+ .device = uart_console_device,
+ .write = uart_clps711x_console_write,
+ .setup = uart_clps711x_console_setup,
+ .flags = CON_PRINTBUFFER,
+ .index = -1,
+};
#endif
static int uart_clps711x_probe(struct platform_device *pdev)
{
+ struct device_node *np = pdev->dev.of_node;
+ int ret, index = np ? of_alias_get_id(np, "serial") : pdev->id;
struct clps711x_port *s;
- int ret, i;
+ struct resource *res;
+ struct clk *uart_clk;
- s = devm_kzalloc(&pdev->dev, sizeof(struct clps711x_port), GFP_KERNEL);
- if (!s) {
- dev_err(&pdev->dev, "Error allocating port structure\n");
+ if (index < 0 || index >= UART_CLPS711X_NR)
+ return -EINVAL;
+
+ s = devm_kzalloc(&pdev->dev, sizeof(*s), GFP_KERNEL);
+ if (!s)
return -ENOMEM;
+
+ uart_clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(uart_clk))
+ return PTR_ERR(uart_clk);
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ s->port.membase = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(s->port.membase))
+ return PTR_ERR(s->port.membase);
+
+ s->port.irq = platform_get_irq(pdev, 0);
+ if (IS_ERR_VALUE(s->port.irq))
+ return s->port.irq;
+
+ s->rx_irq = platform_get_irq(pdev, 1);
+ if (IS_ERR_VALUE(s->rx_irq))
+ return s->rx_irq;
+
+ if (!np) {
+ char syscon_name[9];
+
+ sprintf(syscon_name, "syscon.%i", index + 1);
+ s->syscon = syscon_regmap_lookup_by_pdevname(syscon_name);
+ if (IS_ERR(s->syscon))
+ return PTR_ERR(s->syscon);
+
+ s->use_ms = !index;
+ } else {
+ s->syscon = syscon_regmap_lookup_by_phandle(np, "syscon");
+ if (IS_ERR(s->syscon))
+ return PTR_ERR(s->syscon);
+
+ if (!index)
+ s->use_ms = of_property_read_bool(np, "uart-use-ms");
}
+
+ s->port.line = index;
+ s->port.dev = &pdev->dev;
+ s->port.iotype = UPIO_MEM32;
+ s->port.mapbase = res->start;
+ s->port.type = PORT_CLPS711X;
+ s->port.fifosize = 16;
+ s->port.flags = UPF_SKIP_TEST | UPF_FIXED_TYPE;
+ s->port.uartclk = clk_get_rate(uart_clk);
+ s->port.ops = &uart_clps711x_ops;
+
platform_set_drvdata(pdev, s);
- s->uart_clk = devm_clk_get(&pdev->dev, "uart");
- if (IS_ERR(s->uart_clk)) {
- dev_err(&pdev->dev, "Can't get UART clocks\n");
- return PTR_ERR(s->uart_clk);
- }
+ ret = uart_add_one_port(&clps711x_uart, &s->port);
+ if (ret)
+ return ret;
- s->uart.owner = THIS_MODULE;
- s->uart.dev_name = "ttyCL";
- s->uart.major = UART_CLPS711X_MAJOR;
- s->uart.minor = UART_CLPS711X_MINOR;
- s->uart.nr = UART_CLPS711X_NR;
-#ifdef CONFIG_SERIAL_CLPS711X_CONSOLE
- s->uart.cons = &s->console;
- s->uart.cons->device = uart_console_device;
- s->uart.cons->write = uart_clps711x_console_write;
- s->uart.cons->setup = uart_clps711x_console_setup;
- s->uart.cons->flags = CON_PRINTBUFFER;
- s->uart.cons->index = -1;
- s->uart.cons->data = s;
- strcpy(s->uart.cons->name, "ttyCL");
-#endif
- ret = uart_register_driver(&s->uart);
+ /* Disable port */
+ if (!uart_console(&s->port))
+ regmap_update_bits(s->syscon, SYSCON_OFFSET, SYSCON_UARTEN, 0);
+
+ s->tx_enabled = 1;
+
+ ret = devm_request_irq(&pdev->dev, s->port.irq, uart_clps711x_int_tx, 0,
+ dev_name(&pdev->dev), &s->port);
if (ret) {
- dev_err(&pdev->dev, "Registering UART driver failed\n");
+ uart_remove_one_port(&clps711x_uart, &s->port);
return ret;
}
- for (i = 0; i < UART_CLPS711X_NR; i++) {
- s->port[i].line = i;
- s->port[i].dev = &pdev->dev;
- s->port[i].irq = TX_IRQ(&s->port[i]);
- s->port[i].iobase = SYSCON(&s->port[i]);
- s->port[i].type = PORT_CLPS711X;
- s->port[i].fifosize = 16;
- s->port[i].flags = UPF_SKIP_TEST | UPF_FIXED_TYPE;
- s->port[i].uartclk = clk_get_rate(s->uart_clk);
- s->port[i].ops = &uart_clps711x_ops;
- WARN_ON(uart_add_one_port(&s->uart, &s->port[i]));
- }
+ ret = devm_request_irq(&pdev->dev, s->rx_irq, uart_clps711x_int_rx, 0,
+ dev_name(&pdev->dev), &s->port);
+ if (ret)
+ uart_remove_one_port(&clps711x_uart, &s->port);
- return 0;
+ return ret;
}
static int uart_clps711x_remove(struct platform_device *pdev)
{
struct clps711x_port *s = platform_get_drvdata(pdev);
- int i;
- for (i = 0; i < UART_CLPS711X_NR; i++)
- uart_remove_one_port(&s->uart, &s->port[i]);
-
- uart_unregister_driver(&s->uart);
-
- return 0;
+ return uart_remove_one_port(&clps711x_uart, &s->port);
}
-static struct platform_driver clps711x_uart_driver = {
+static const struct of_device_id __maybe_unused clps711x_uart_dt_ids[] = {
+ { .compatible = "cirrus,clps711x-uart", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, clps711x_uart_dt_ids);
+
+static struct platform_driver clps711x_uart_platform = {
.driver = {
- .name = UART_CLPS711X_NAME,
- .owner = THIS_MODULE,
+ .name = "clps711x-uart",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(clps711x_uart_dt_ids),
},
.probe = uart_clps711x_probe,
.remove = uart_clps711x_remove,
};
-module_platform_driver(clps711x_uart_driver);
-
-static struct platform_device clps711x_uart_device = {
- .name = UART_CLPS711X_NAME,
-};
static int __init uart_clps711x_init(void)
{
- return platform_device_register(&clps711x_uart_device);
+ int ret;
+
+#ifdef CONFIG_SERIAL_CLPS711X_CONSOLE
+ clps711x_uart.cons = &clps711x_console;
+ clps711x_console.data = &clps711x_uart;
+#endif
+
+ ret = uart_register_driver(&clps711x_uart);
+ if (ret)
+ return ret;
+
+ return platform_driver_register(&clps711x_uart_platform);
}
module_init(uart_clps711x_init);
static void __exit uart_clps711x_exit(void)
{
- platform_device_unregister(&clps711x_uart_device);
+ platform_driver_unregister(&clps711x_uart_platform);
+ uart_unregister_driver(&clps711x_uart);
}
module_exit(uart_clps711x_exit);
#include <linux/tty.h>
#include <linux/gfp.h>
#include <linux/ioport.h>
-#include <linux/init.h>
#include <linux/serial.h>
#include <linux/console.h>
#include <linux/sysrq.h>
#include <linux/tty.h>
#include <linux/ioport.h>
#include <linux/slab.h>
-#include <linux/init.h>
#include <linux/serial.h>
#include <linux/console.h>
#include <linux/sysrq.h>
if (readl(sport->port.membase + UCR2) & UCR2_CTS)
tmp |= TIOCM_RTS;
+ if (readl(sport->port.membase + uts_reg(sport)) & UTS_LOOP)
+ tmp |= TIOCM_LOOP;
+
return tmp;
}
temp |= UCR2_CTS;
writel(temp, sport->port.membase + UCR2);
+
+ temp = readl(sport->port.membase + uts_reg(sport)) & ~UTS_LOOP;
+ if (mctrl & TIOCM_LOOP)
+ temp |= UTS_LOOP;
+ writel(temp, sport->port.membase + uts_reg(sport));
}
/*
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/compiler.h>
-#include <linux/init.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/atomic.h>
static int mxs_auart_startup(struct uart_port *u)
{
+ int ret;
struct mxs_auart_port *s = to_auart_port(u);
- clk_prepare_enable(s->clk);
+ ret = clk_prepare_enable(s->clk);
+ if (ret)
+ return ret;
writel(AUART_CTRL0_CLKGATE, u->membase + AUART_CTRL0_CLR);
if (!s)
return -ENODEV;
- clk_prepare_enable(s->clk);
+ ret = clk_prepare_enable(s->clk);
+ if (ret)
+ return ret;
if (options)
uart_parse_options(options, &baud, &parity, &bits, &flow);
* 2 of the License, or (at your option) any later version.
*
*/
-#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/delay.h>
debugfs_remove(priv->debugfs);
#endif
uart_remove_one_port(&pch_uart_driver, &priv->port);
- pci_set_drvdata(priv->pdev, NULL);
free_page((unsigned long)priv->rxbuf.buf);
}
#define pch_uart_pci_resume NULL
#endif
-static DEFINE_PCI_DEVICE_TABLE(pch_uart_pci_id) = {
+static const struct pci_device_id pch_uart_pci_id[] = {
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x8811),
.driver_data = pch_et20t_uart0},
{PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x8812),
rp2_remove_ports(card);
}
-static DEFINE_PCI_DEVICE_TABLE(rp2_pci_tbl) = {
+static const struct pci_device_id rp2_pci_tbl[] = {
/* RocketPort INFINITY cards */
+++ /dev/null
-/*
- * SC268xx.c: Serial driver for Philiphs SC2681/SC2692 devices.
- *
- * Copyright (C) 2006,2007 Thomas Bogendörfer (tsbogend@alpha.franken.de)
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/major.h>
-#include <linux/circ_buf.h>
-#include <linux/serial.h>
-#include <linux/sysrq.h>
-#include <linux/console.h>
-#include <linux/spinlock.h>
-#include <linux/slab.h>
-#include <linux/delay.h>
-#include <linux/init.h>
-#include <linux/platform_device.h>
-#include <linux/irq.h>
-#include <linux/io.h>
-
-#warning "Please try migrate to use new driver SCCNXP and report the status" \
- "in the linux-serial mailing list."
-
-#if defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
-#include <linux/serial_core.h>
-
-#define SC26XX_MAJOR 204
-#define SC26XX_MINOR_START 205
-#define SC26XX_NR 2
-
-struct uart_sc26xx_port {
- struct uart_port port[2];
- u8 dsr_mask[2];
- u8 cts_mask[2];
- u8 dcd_mask[2];
- u8 ri_mask[2];
- u8 dtr_mask[2];
- u8 rts_mask[2];
- u8 imr;
-};
-
-/* register common to both ports */
-#define RD_ISR 0x14
-#define RD_IPR 0x34
-
-#define WR_ACR 0x10
-#define WR_IMR 0x14
-#define WR_OPCR 0x34
-#define WR_OPR_SET 0x38
-#define WR_OPR_CLR 0x3C
-
-/* access common register */
-#define READ_SC(p, r) readb((p)->membase + RD_##r)
-#define WRITE_SC(p, r, v) writeb((v), (p)->membase + WR_##r)
-
-/* register per port */
-#define RD_PORT_MRx 0x00
-#define RD_PORT_SR 0x04
-#define RD_PORT_RHR 0x0c
-
-#define WR_PORT_MRx 0x00
-#define WR_PORT_CSR 0x04
-#define WR_PORT_CR 0x08
-#define WR_PORT_THR 0x0c
-
-/* SR bits */
-#define SR_BREAK (1 << 7)
-#define SR_FRAME (1 << 6)
-#define SR_PARITY (1 << 5)
-#define SR_OVERRUN (1 << 4)
-#define SR_TXRDY (1 << 2)
-#define SR_RXRDY (1 << 0)
-
-#define CR_RES_MR (1 << 4)
-#define CR_RES_RX (2 << 4)
-#define CR_RES_TX (3 << 4)
-#define CR_STRT_BRK (6 << 4)
-#define CR_STOP_BRK (7 << 4)
-#define CR_DIS_TX (1 << 3)
-#define CR_ENA_TX (1 << 2)
-#define CR_DIS_RX (1 << 1)
-#define CR_ENA_RX (1 << 0)
-
-/* ISR bits */
-#define ISR_RXRDYB (1 << 5)
-#define ISR_TXRDYB (1 << 4)
-#define ISR_RXRDYA (1 << 1)
-#define ISR_TXRDYA (1 << 0)
-
-/* IMR bits */
-#define IMR_RXRDY (1 << 1)
-#define IMR_TXRDY (1 << 0)
-
-/* access port register */
-static inline u8 read_sc_port(struct uart_port *p, u8 reg)
-{
- return readb(p->membase + p->line * 0x20 + reg);
-}
-
-static inline void write_sc_port(struct uart_port *p, u8 reg, u8 val)
-{
- writeb(val, p->membase + p->line * 0x20 + reg);
-}
-
-#define READ_SC_PORT(p, r) read_sc_port(p, RD_PORT_##r)
-#define WRITE_SC_PORT(p, r, v) write_sc_port(p, WR_PORT_##r, v)
-
-static void sc26xx_enable_irq(struct uart_port *port, int mask)
-{
- struct uart_sc26xx_port *up;
- int line = port->line;
-
- port -= line;
- up = container_of(port, struct uart_sc26xx_port, port[0]);
-
- up->imr |= mask << (line * 4);
- WRITE_SC(port, IMR, up->imr);
-}
-
-static void sc26xx_disable_irq(struct uart_port *port, int mask)
-{
- struct uart_sc26xx_port *up;
- int line = port->line;
-
- port -= line;
- up = container_of(port, struct uart_sc26xx_port, port[0]);
-
- up->imr &= ~(mask << (line * 4));
- WRITE_SC(port, IMR, up->imr);
-}
-
-static bool receive_chars(struct uart_port *port)
-{
- struct tty_port *tport = NULL;
- int limit = 10000;
- unsigned char ch;
- char flag;
- u8 status;
-
- /* FIXME what is this trying to achieve? */
- if (port->state != NULL) /* Unopened serial console */
- tport = &port->state->port;
-
- while (limit-- > 0) {
- status = READ_SC_PORT(port, SR);
- if (!(status & SR_RXRDY))
- break;
- ch = READ_SC_PORT(port, RHR);
-
- flag = TTY_NORMAL;
- port->icount.rx++;
-
- if (unlikely(status & (SR_BREAK | SR_FRAME |
- SR_PARITY | SR_OVERRUN))) {
- if (status & SR_BREAK) {
- status &= ~(SR_PARITY | SR_FRAME);
- port->icount.brk++;
- if (uart_handle_break(port))
- continue;
- } else if (status & SR_PARITY)
- port->icount.parity++;
- else if (status & SR_FRAME)
- port->icount.frame++;
- if (status & SR_OVERRUN)
- port->icount.overrun++;
-
- status &= port->read_status_mask;
- if (status & SR_BREAK)
- flag = TTY_BREAK;
- else if (status & SR_PARITY)
- flag = TTY_PARITY;
- else if (status & SR_FRAME)
- flag = TTY_FRAME;
- }
-
- if (uart_handle_sysrq_char(port, ch))
- continue;
-
- if (status & port->ignore_status_mask)
- continue;
-
- tty_insert_flip_char(tport, ch, flag);
- }
- return !!tport;
-}
-
-static void transmit_chars(struct uart_port *port)
-{
- struct circ_buf *xmit;
-
- if (!port->state)
- return;
-
- xmit = &port->state->xmit;
- if (uart_circ_empty(xmit) || uart_tx_stopped(port)) {
- sc26xx_disable_irq(port, IMR_TXRDY);
- return;
- }
- while (!uart_circ_empty(xmit)) {
- if (!(READ_SC_PORT(port, SR) & SR_TXRDY))
- break;
-
- WRITE_SC_PORT(port, THR, xmit->buf[xmit->tail]);
- xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
- port->icount.tx++;
- }
- if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
- uart_write_wakeup(port);
-}
-
-static irqreturn_t sc26xx_interrupt(int irq, void *dev_id)
-{
- struct uart_sc26xx_port *up = dev_id;
- unsigned long flags;
- bool push;
- u8 isr;
-
- spin_lock_irqsave(&up->port[0].lock, flags);
-
- push = false;
- isr = READ_SC(&up->port[0], ISR);
- if (isr & ISR_TXRDYA)
- transmit_chars(&up->port[0]);
- if (isr & ISR_RXRDYA)
- push = receive_chars(&up->port[0]);
-
- spin_unlock(&up->port[0].lock);
-
- if (push)
- tty_flip_buffer_push(&up->port[0].state->port);
-
- spin_lock(&up->port[1].lock);
-
- push = false;
- if (isr & ISR_TXRDYB)
- transmit_chars(&up->port[1]);
- if (isr & ISR_RXRDYB)
- push = receive_chars(&up->port[1]);
-
- spin_unlock_irqrestore(&up->port[1].lock, flags);
-
- if (push)
- tty_flip_buffer_push(&up->port[1].state->port);
-
- return IRQ_HANDLED;
-}
-
-/* port->lock is not held. */
-static unsigned int sc26xx_tx_empty(struct uart_port *port)
-{
- return (READ_SC_PORT(port, SR) & SR_TXRDY) ? TIOCSER_TEMT : 0;
-}
-
-/* port->lock held by caller. */
-static void sc26xx_set_mctrl(struct uart_port *port, unsigned int mctrl)
-{
- struct uart_sc26xx_port *up;
- int line = port->line;
-
- port -= line;
- up = container_of(port, struct uart_sc26xx_port, port[0]);
-
- if (up->dtr_mask[line]) {
- if (mctrl & TIOCM_DTR)
- WRITE_SC(port, OPR_SET, up->dtr_mask[line]);
- else
- WRITE_SC(port, OPR_CLR, up->dtr_mask[line]);
- }
- if (up->rts_mask[line]) {
- if (mctrl & TIOCM_RTS)
- WRITE_SC(port, OPR_SET, up->rts_mask[line]);
- else
- WRITE_SC(port, OPR_CLR, up->rts_mask[line]);
- }
-}
-
-/* port->lock is held by caller and interrupts are disabled. */
-static unsigned int sc26xx_get_mctrl(struct uart_port *port)
-{
- struct uart_sc26xx_port *up;
- int line = port->line;
- unsigned int mctrl = TIOCM_DSR | TIOCM_CTS | TIOCM_CAR;
- u8 ipr;
-
- port -= line;
- up = container_of(port, struct uart_sc26xx_port, port[0]);
- ipr = READ_SC(port, IPR) ^ 0xff;
-
- if (up->dsr_mask[line]) {
- mctrl &= ~TIOCM_DSR;
- mctrl |= ipr & up->dsr_mask[line] ? TIOCM_DSR : 0;
- }
- if (up->cts_mask[line]) {
- mctrl &= ~TIOCM_CTS;
- mctrl |= ipr & up->cts_mask[line] ? TIOCM_CTS : 0;
- }
- if (up->dcd_mask[line]) {
- mctrl &= ~TIOCM_CAR;
- mctrl |= ipr & up->dcd_mask[line] ? TIOCM_CAR : 0;
- }
- if (up->ri_mask[line]) {
- mctrl &= ~TIOCM_RNG;
- mctrl |= ipr & up->ri_mask[line] ? TIOCM_RNG : 0;
- }
- return mctrl;
-}
-
-/* port->lock held by caller. */
-static void sc26xx_stop_tx(struct uart_port *port)
-{
- return;
-}
-
-/* port->lock held by caller. */
-static void sc26xx_start_tx(struct uart_port *port)
-{
- struct circ_buf *xmit = &port->state->xmit;
-
- while (!uart_circ_empty(xmit)) {
- if (!(READ_SC_PORT(port, SR) & SR_TXRDY)) {
- sc26xx_enable_irq(port, IMR_TXRDY);
- break;
- }
- WRITE_SC_PORT(port, THR, xmit->buf[xmit->tail]);
- xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
- port->icount.tx++;
- }
-}
-
-/* port->lock held by caller. */
-static void sc26xx_stop_rx(struct uart_port *port)
-{
-}
-
-/* port->lock held by caller. */
-static void sc26xx_enable_ms(struct uart_port *port)
-{
-}
-
-/* port->lock is not held. */
-static void sc26xx_break_ctl(struct uart_port *port, int break_state)
-{
- if (break_state == -1)
- WRITE_SC_PORT(port, CR, CR_STRT_BRK);
- else
- WRITE_SC_PORT(port, CR, CR_STOP_BRK);
-}
-
-/* port->lock is not held. */
-static int sc26xx_startup(struct uart_port *port)
-{
- sc26xx_disable_irq(port, IMR_TXRDY | IMR_RXRDY);
- WRITE_SC(port, OPCR, 0);
-
- /* reset tx and rx */
- WRITE_SC_PORT(port, CR, CR_RES_RX);
- WRITE_SC_PORT(port, CR, CR_RES_TX);
-
- /* start rx/tx */
- WRITE_SC_PORT(port, CR, CR_ENA_TX | CR_ENA_RX);
-
- /* enable irqs */
- sc26xx_enable_irq(port, IMR_RXRDY);
- return 0;
-}
-
-/* port->lock is not held. */
-static void sc26xx_shutdown(struct uart_port *port)
-{
- /* disable interrupst */
- sc26xx_disable_irq(port, IMR_TXRDY | IMR_RXRDY);
-
- /* stop tx/rx */
- WRITE_SC_PORT(port, CR, CR_DIS_TX | CR_DIS_RX);
-}
-
-/* port->lock is not held. */
-static void sc26xx_set_termios(struct uart_port *port, struct ktermios *termios,
- struct ktermios *old)
-{
- unsigned int baud = uart_get_baud_rate(port, termios, old, 0, 4000000);
- unsigned int quot = uart_get_divisor(port, baud);
- unsigned int iflag, cflag;
- unsigned long flags;
- u8 mr1, mr2, csr;
-
- spin_lock_irqsave(&port->lock, flags);
-
- while ((READ_SC_PORT(port, SR) & ((1 << 3) | (1 << 2))) != 0xc)
- udelay(2);
-
- WRITE_SC_PORT(port, CR, CR_DIS_TX | CR_DIS_RX);
-
- iflag = termios->c_iflag;
- cflag = termios->c_cflag;
-
- port->read_status_mask = SR_OVERRUN;
- if (iflag & INPCK)
- port->read_status_mask |= SR_PARITY | SR_FRAME;
- if (iflag & (BRKINT | PARMRK))
- port->read_status_mask |= SR_BREAK;
-
- port->ignore_status_mask = 0;
- if (iflag & IGNBRK)
- port->ignore_status_mask |= SR_BREAK;
- if ((cflag & CREAD) == 0)
- port->ignore_status_mask |= SR_BREAK | SR_FRAME |
- SR_PARITY | SR_OVERRUN;
-
- switch (cflag & CSIZE) {
- case CS5:
- mr1 = 0x00;
- break;
- case CS6:
- mr1 = 0x01;
- break;
- case CS7:
- mr1 = 0x02;
- break;
- default:
- case CS8:
- mr1 = 0x03;
- break;
- }
- mr2 = 0x07;
- if (cflag & CSTOPB)
- mr2 = 0x0f;
- if (cflag & PARENB) {
- if (cflag & PARODD)
- mr1 |= (1 << 2);
- } else
- mr1 |= (2 << 3);
-
- switch (baud) {
- case 50:
- csr = 0x00;
- break;
- case 110:
- csr = 0x11;
- break;
- case 134:
- csr = 0x22;
- break;
- case 200:
- csr = 0x33;
- break;
- case 300:
- csr = 0x44;
- break;
- case 600:
- csr = 0x55;
- break;
- case 1200:
- csr = 0x66;
- break;
- case 2400:
- csr = 0x88;
- break;
- case 4800:
- csr = 0x99;
- break;
- default:
- case 9600:
- csr = 0xbb;
- break;
- case 19200:
- csr = 0xcc;
- break;
- }
-
- WRITE_SC_PORT(port, CR, CR_RES_MR);
- WRITE_SC_PORT(port, MRx, mr1);
- WRITE_SC_PORT(port, MRx, mr2);
-
- WRITE_SC(port, ACR, 0x80);
- WRITE_SC_PORT(port, CSR, csr);
-
- /* reset tx and rx */
- WRITE_SC_PORT(port, CR, CR_RES_RX);
- WRITE_SC_PORT(port, CR, CR_RES_TX);
-
- WRITE_SC_PORT(port, CR, CR_ENA_TX | CR_ENA_RX);
- while ((READ_SC_PORT(port, SR) & ((1 << 3) | (1 << 2))) != 0xc)
- udelay(2);
-
- /* XXX */
- uart_update_timeout(port, cflag,
- (port->uartclk / (16 * quot)));
-
- spin_unlock_irqrestore(&port->lock, flags);
-}
-
-static const char *sc26xx_type(struct uart_port *port)
-{
- return "SC26XX";
-}
-
-static void sc26xx_release_port(struct uart_port *port)
-{
-}
-
-static int sc26xx_request_port(struct uart_port *port)
-{
- return 0;
-}
-
-static void sc26xx_config_port(struct uart_port *port, int flags)
-{
-}
-
-static int sc26xx_verify_port(struct uart_port *port, struct serial_struct *ser)
-{
- return -EINVAL;
-}
-
-static struct uart_ops sc26xx_ops = {
- .tx_empty = sc26xx_tx_empty,
- .set_mctrl = sc26xx_set_mctrl,
- .get_mctrl = sc26xx_get_mctrl,
- .stop_tx = sc26xx_stop_tx,
- .start_tx = sc26xx_start_tx,
- .stop_rx = sc26xx_stop_rx,
- .enable_ms = sc26xx_enable_ms,
- .break_ctl = sc26xx_break_ctl,
- .startup = sc26xx_startup,
- .shutdown = sc26xx_shutdown,
- .set_termios = sc26xx_set_termios,
- .type = sc26xx_type,
- .release_port = sc26xx_release_port,
- .request_port = sc26xx_request_port,
- .config_port = sc26xx_config_port,
- .verify_port = sc26xx_verify_port,
-};
-
-static struct uart_port *sc26xx_port;
-
-#ifdef CONFIG_SERIAL_SC26XX_CONSOLE
-static void sc26xx_console_putchar(struct uart_port *port, char c)
-{
- unsigned long flags;
- int limit = 1000000;
-
- spin_lock_irqsave(&port->lock, flags);
-
- while (limit-- > 0) {
- if (READ_SC_PORT(port, SR) & SR_TXRDY) {
- WRITE_SC_PORT(port, THR, c);
- break;
- }
- udelay(2);
- }
-
- spin_unlock_irqrestore(&port->lock, flags);
-}
-
-static void sc26xx_console_write(struct console *con, const char *s, unsigned n)
-{
- struct uart_port *port = sc26xx_port;
- int i;
-
- for (i = 0; i < n; i++) {
- if (*s == '\n')
- sc26xx_console_putchar(port, '\r');
- sc26xx_console_putchar(port, *s++);
- }
-}
-
-static int __init sc26xx_console_setup(struct console *con, char *options)
-{
- struct uart_port *port = sc26xx_port;
- int baud = 9600;
- int bits = 8;
- int parity = 'n';
- int flow = 'n';
-
- if (port->type != PORT_SC26XX)
- return -1;
-
- printk(KERN_INFO "Console: ttySC%d (SC26XX)\n", con->index);
- if (options)
- uart_parse_options(options, &baud, &parity, &bits, &flow);
-
- return uart_set_options(port, con, baud, parity, bits, flow);
-}
-
-static struct uart_driver sc26xx_reg;
-static struct console sc26xx_console = {
- .name = "ttySC",
- .write = sc26xx_console_write,
- .device = uart_console_device,
- .setup = sc26xx_console_setup,
- .flags = CON_PRINTBUFFER,
- .index = -1,
- .data = &sc26xx_reg,
-};
-#define SC26XX_CONSOLE &sc26xx_console
-#else
-#define SC26XX_CONSOLE NULL
-#endif
-
-static struct uart_driver sc26xx_reg = {
- .owner = THIS_MODULE,
- .driver_name = "SC26xx",
- .dev_name = "ttySC",
- .major = SC26XX_MAJOR,
- .minor = SC26XX_MINOR_START,
- .nr = SC26XX_NR,
- .cons = SC26XX_CONSOLE,
-};
-
-static u8 sc26xx_flags2mask(unsigned int flags, unsigned int bitpos)
-{
- unsigned int bit = (flags >> bitpos) & 15;
-
- return bit ? (1 << (bit - 1)) : 0;
-}
-
-static void sc26xx_init_masks(struct uart_sc26xx_port *up,
- int line, unsigned int data)
-{
- up->dtr_mask[line] = sc26xx_flags2mask(data, 0);
- up->rts_mask[line] = sc26xx_flags2mask(data, 4);
- up->dsr_mask[line] = sc26xx_flags2mask(data, 8);
- up->cts_mask[line] = sc26xx_flags2mask(data, 12);
- up->dcd_mask[line] = sc26xx_flags2mask(data, 16);
- up->ri_mask[line] = sc26xx_flags2mask(data, 20);
-}
-
-static int sc26xx_probe(struct platform_device *dev)
-{
- struct resource *res;
- struct uart_sc26xx_port *up;
- unsigned int *sc26xx_data = dev_get_platdata(&dev->dev);
- int err;
-
- res = platform_get_resource(dev, IORESOURCE_MEM, 0);
- if (!res)
- return -ENODEV;
-
- up = kzalloc(sizeof *up, GFP_KERNEL);
- if (unlikely(!up))
- return -ENOMEM;
-
- up->port[0].line = 0;
- up->port[0].ops = &sc26xx_ops;
- up->port[0].type = PORT_SC26XX;
- up->port[0].uartclk = (29491200 / 16); /* arbitrary */
-
- up->port[0].mapbase = res->start;
- up->port[0].membase = ioremap_nocache(up->port[0].mapbase, 0x40);
- up->port[0].iotype = UPIO_MEM;
- up->port[0].irq = platform_get_irq(dev, 0);
-
- up->port[0].dev = &dev->dev;
-
- sc26xx_init_masks(up, 0, sc26xx_data[0]);
-
- sc26xx_port = &up->port[0];
-
- up->port[1].line = 1;
- up->port[1].ops = &sc26xx_ops;
- up->port[1].type = PORT_SC26XX;
- up->port[1].uartclk = (29491200 / 16); /* arbitrary */
-
- up->port[1].mapbase = up->port[0].mapbase;
- up->port[1].membase = up->port[0].membase;
- up->port[1].iotype = UPIO_MEM;
- up->port[1].irq = up->port[0].irq;
-
- up->port[1].dev = &dev->dev;
-
- sc26xx_init_masks(up, 1, sc26xx_data[1]);
-
- err = uart_register_driver(&sc26xx_reg);
- if (err)
- goto out_free_port;
-
- sc26xx_reg.tty_driver->name_base = sc26xx_reg.minor;
-
- err = uart_add_one_port(&sc26xx_reg, &up->port[0]);
- if (err)
- goto out_unregister_driver;
-
- err = uart_add_one_port(&sc26xx_reg, &up->port[1]);
- if (err)
- goto out_remove_port0;
-
- err = request_irq(up->port[0].irq, sc26xx_interrupt, 0, "sc26xx", up);
- if (err)
- goto out_remove_ports;
-
- platform_set_drvdata(dev, up);
- return 0;
-
-out_remove_ports:
- uart_remove_one_port(&sc26xx_reg, &up->port[1]);
-out_remove_port0:
- uart_remove_one_port(&sc26xx_reg, &up->port[0]);
-
-out_unregister_driver:
- uart_unregister_driver(&sc26xx_reg);
-
-out_free_port:
- kfree(up);
- sc26xx_port = NULL;
- return err;
-}
-
-
-static int __exit sc26xx_driver_remove(struct platform_device *dev)
-{
- struct uart_sc26xx_port *up = platform_get_drvdata(dev);
-
- free_irq(up->port[0].irq, up);
-
- uart_remove_one_port(&sc26xx_reg, &up->port[0]);
- uart_remove_one_port(&sc26xx_reg, &up->port[1]);
-
- uart_unregister_driver(&sc26xx_reg);
-
- kfree(up);
- sc26xx_port = NULL;
-
- return 0;
-}
-
-static struct platform_driver sc26xx_driver = {
- .probe = sc26xx_probe,
- .remove = sc26xx_driver_remove,
- .driver = {
- .name = "SC26xx",
- .owner = THIS_MODULE,
- },
-};
-
-module_platform_driver(sc26xx_driver);
-
-MODULE_AUTHOR("Thomas Bogendörfer");
-MODULE_DESCRIPTION("SC681/SC2692 serial driver");
-MODULE_VERSION("1.0");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:SC26xx");
/*
* Ensure that the serial console lock is initialised
* early.
+ * If this port is a console, then the spinlock is already
+ * initialised.
*/
- spin_lock_init(&port->lock);
- lockdep_set_class(&port->lock, &port_lock_key);
+ if (!(uart_console(port) && (port->cons->flags & CON_ENABLED))) {
+ spin_lock_init(&port->lock);
+ lockdep_set_class(&port->lock, &port_lock_key);
+ }
memset(&termios, 0, sizeof(struct ktermios));
struct sirfsoc_int_status *uint_st = &sirfport->uart_reg->uart_int_st;
unsigned int count;
unsigned long flags;
+ struct dma_tx_state tx_state;
spin_lock_irqsave(&sirfport->rx_lock, flags);
- while (sirfport->rx_completed != sirfport->rx_issued) {
+ while (DMA_COMPLETE == dmaengine_tx_status(sirfport->rx_dma_chan,
+ sirfport->rx_dma_items[sirfport->rx_completed].cookie, &tx_state)) {
sirfsoc_uart_insert_rx_buf_to_tty(sirfport,
SIRFSOC_RX_DMA_BUF_SIZE);
sirfport->rx_completed++;
struct sirfsoc_register *ureg = &sirfport->uart_reg->uart_reg;
struct sirfsoc_int_en *uint_en = &sirfport->uart_reg->uart_int_en;
unsigned long flags;
+ struct dma_tx_state tx_state;
spin_lock_irqsave(&sirfport->rx_lock, flags);
- while (sirfport->rx_completed != sirfport->rx_issued) {
+ while (DMA_COMPLETE == dmaengine_tx_status(sirfport->rx_dma_chan,
+ sirfport->rx_dma_items[sirfport->rx_completed].cookie, &tx_state)) {
sirfsoc_uart_insert_rx_buf_to_tty(sirfport,
SIRFSOC_RX_DMA_BUF_SIZE);
if (rd_regl(port, ureg->sirfsoc_int_en_reg) &
spin_unlock_irqrestore(&port->lock, flags);
}
+static void sirfsoc_uart_pm(struct uart_port *port, unsigned int state,
+ unsigned int oldstate)
+{
+ struct sirfsoc_uart_port *sirfport = to_sirfport(port);
+ if (!state)
+ clk_prepare_enable(sirfport->clk);
+ else
+ clk_disable_unprepare(sirfport->clk);
+}
+
static unsigned int sirfsoc_uart_init_tx_dma(struct uart_port *port)
{
struct sirfsoc_uart_port *sirfport = to_sirfport(port);
.startup = sirfsoc_uart_startup,
.shutdown = sirfsoc_uart_shutdown,
.set_termios = sirfsoc_uart_set_termios,
+ .pm = sirfsoc_uart_pm,
.type = sirfsoc_uart_type,
.release_port = sirfsoc_uart_release_port,
.request_port = sirfsoc_uart_request_port,
ret = PTR_ERR(sirfport->clk);
goto err;
}
- clk_prepare_enable(sirfport->clk);
port->uartclk = clk_get_rate(sirfport->clk);
port->ops = &sirfsoc_uart_ops;
return 0;
port_err:
- clk_disable_unprepare(sirfport->clk);
clk_put(sirfport->clk);
err:
return ret;
{
struct sirfsoc_uart_port *sirfport = platform_get_drvdata(pdev);
struct uart_port *port = &sirfport->port;
- clk_disable_unprepare(sirfport->clk);
clk_put(sirfport->clk);
uart_remove_one_port(&sirfsoc_uart_drv, port);
return 0;
}
+#ifdef CONFIG_PM_SLEEP
static int
-sirfsoc_uart_suspend(struct platform_device *pdev, pm_message_t state)
+sirfsoc_uart_suspend(struct device *pdev)
{
- struct sirfsoc_uart_port *sirfport = platform_get_drvdata(pdev);
+ struct sirfsoc_uart_port *sirfport = dev_get_drvdata(pdev);
struct uart_port *port = &sirfport->port;
uart_suspend_port(&sirfsoc_uart_drv, port);
return 0;
}
-static int sirfsoc_uart_resume(struct platform_device *pdev)
+static int sirfsoc_uart_resume(struct device *pdev)
{
- struct sirfsoc_uart_port *sirfport = platform_get_drvdata(pdev);
+ struct sirfsoc_uart_port *sirfport = dev_get_drvdata(pdev);
struct uart_port *port = &sirfport->port;
uart_resume_port(&sirfsoc_uart_drv, port);
return 0;
}
+#endif
+
+static const struct dev_pm_ops sirfsoc_uart_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(sirfsoc_uart_suspend, sirfsoc_uart_resume)
+};
static struct platform_driver sirfsoc_uart_driver = {
.probe = sirfsoc_uart_probe,
.remove = sirfsoc_uart_remove,
- .suspend = sirfsoc_uart_suspend,
- .resume = sirfsoc_uart_resume,
.driver = {
.name = SIRFUART_PORT_NAME,
.owner = THIS_MODULE,
.of_match_table = sirfsoc_uart_ids,
+ .pm = &sirfsoc_uart_pm_ops,
},
};
/* If port is closing, signal caller to try again */
if (tty_hung_up_p(filp) || info->port.flags & ASYNC_CLOSING){
- if (info->port.flags & ASYNC_CLOSING)
- interruptible_sleep_on(&info->port.close_wait);
+ wait_event_interruptible_tty(tty, info->port.close_wait,
+ !(info->port.flags & ASYNC_CLOSING));
retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
-EAGAIN : -ERESTARTSYS);
goto cleanup;
/* If port is closing, signal caller to try again */
if (tty_hung_up_p(filp) || info->port.flags & ASYNC_CLOSING){
- if (info->port.flags & ASYNC_CLOSING)
- interruptible_sleep_on(&info->port.close_wait);
+ wait_event_interruptible_tty(tty, info->port.close_wait,
+ !(info->port.flags & ASYNC_CLOSING));
retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
-EAGAIN : -ERESTARTSYS);
goto cleanup;
/* If port is closing, signal caller to try again */
if (tty_hung_up_p(filp) || info->port.flags & ASYNC_CLOSING){
- if (info->port.flags & ASYNC_CLOSING)
- interruptible_sleep_on(&info->port.close_wait);
+ wait_event_interruptible_tty(tty, info->port.close_wait,
+ !(info->port.flags & ASYNC_CLOSING));
retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ?
-EAGAIN : -ERESTARTSYS);
goto cleanup;
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/sched.h>
-#include <linux/init.h>
#include <linux/wait.h>
#include <linux/bitops.h>
#include <linux/delay.h>
* Byte threshold to limit memory consumption for flip buffers.
* The actual memory limit is > 2x this amount.
*/
-#define TTYB_MEM_LIMIT 65536
+#define TTYB_DEFAULT_MEM_LIMIT 65536
/*
* We default to dicing tty buffer allocations to this many characters
int tty_buffer_space_avail(struct tty_port *port)
{
- int space = TTYB_MEM_LIMIT - atomic_read(&port->buf.memory_used);
+ int space = port->buf.mem_limit - atomic_read(&port->buf.mem_used);
return max(space, 0);
}
+EXPORT_SYMBOL_GPL(tty_buffer_space_avail);
static void tty_buffer_reset(struct tty_buffer *p, size_t size)
{
p->next = NULL;
p->commit = 0;
p->read = 0;
+ p->flags = 0;
}
/**
buf->head = &buf->sentinel;
buf->tail = &buf->sentinel;
- atomic_set(&buf->memory_used, 0);
+ atomic_set(&buf->mem_used, 0);
}
/**
/* Should possibly check if this fails for the largest buffer we
have queued and recycle that ? */
- if (atomic_read(&port->buf.memory_used) > TTYB_MEM_LIMIT)
+ if (atomic_read(&port->buf.mem_used) > port->buf.mem_limit)
return NULL;
p = kmalloc(sizeof(struct tty_buffer) + 2 * size, GFP_ATOMIC);
if (p == NULL)
found:
tty_buffer_reset(p, size);
- atomic_add(size, &port->buf.memory_used);
+ atomic_add(size, &port->buf.mem_used);
return p;
}
struct tty_bufhead *buf = &port->buf;
/* Dumb strategy for now - should keep some stats */
- WARN_ON(atomic_sub_return(b->size, &buf->memory_used) < 0);
+ WARN_ON(atomic_sub_return(b->size, &buf->mem_used) < 0);
if (b->size > MIN_TTYB_SIZE)
kfree(b);
* tty_buffer_flush - flush full tty buffers
* @tty: tty to flush
*
- * flush all the buffers containing receive data. If the buffer is
- * being processed by flush_to_ldisc then we defer the processing
- * to that function
+ * flush all the buffers containing receive data.
*
* Locking: takes buffer lock to ensure single-threaded flip buffer
* 'consumer'
* tty_buffer_request_room - grow tty buffer if needed
* @tty: tty structure
* @size: size desired
+ * @flags: buffer flags if new buffer allocated (default = 0)
*
* Make at least size bytes of linear space available for the tty
* buffer. If we fail return the size we managed to find.
+ *
+ * Will change over to a new buffer if the current buffer is encoded as
+ * TTY_NORMAL (so has no flags buffer) and the new buffer requires
+ * a flags buffer.
*/
-int tty_buffer_request_room(struct tty_port *port, size_t size)
+static int __tty_buffer_request_room(struct tty_port *port, size_t size,
+ int flags)
{
struct tty_bufhead *buf = &port->buf;
struct tty_buffer *b, *n;
- int left;
+ int left, change;
b = buf->tail;
- left = b->size - b->used;
+ if (b->flags & TTYB_NORMAL)
+ left = 2 * b->size - b->used;
+ else
+ left = b->size - b->used;
- if (left < size) {
+ change = (b->flags & TTYB_NORMAL) && (~flags & TTYB_NORMAL);
+ if (change || left < size) {
/* This is the slow path - looking for new buffers to use */
if ((n = tty_buffer_alloc(port, size)) != NULL) {
+ n->flags = flags;
buf->tail = n;
b->commit = b->used;
smp_mb();
b->next = n;
- } else
+ } else if (change)
+ size = 0;
+ else
size = left;
}
return size;
}
+
+int tty_buffer_request_room(struct tty_port *port, size_t size)
+{
+ return __tty_buffer_request_room(port, size, 0);
+}
EXPORT_SYMBOL_GPL(tty_buffer_request_room);
/**
int copied = 0;
do {
int goal = min_t(size_t, size - copied, TTY_BUFFER_PAGE);
- int space = tty_buffer_request_room(port, goal);
+ int flags = (flag == TTY_NORMAL) ? TTYB_NORMAL : 0;
+ int space = __tty_buffer_request_room(port, goal, flags);
struct tty_buffer *tb = port->buf.tail;
if (unlikely(space == 0))
break;
memcpy(char_buf_ptr(tb, tb->used), chars, space);
- memset(flag_buf_ptr(tb, tb->used), flag, space);
+ if (~tb->flags & TTYB_NORMAL)
+ memset(flag_buf_ptr(tb, tb->used), flag, space);
tb->used += space;
copied += space;
chars += space;
int tty_prepare_flip_string(struct tty_port *port, unsigned char **chars,
size_t size)
{
- int space = tty_buffer_request_room(port, size);
+ int space = __tty_buffer_request_room(port, size, TTYB_NORMAL);
if (likely(space)) {
struct tty_buffer *tb = port->buf.tail;
*chars = char_buf_ptr(tb, tb->used);
- memset(flag_buf_ptr(tb, tb->used), TTY_NORMAL, space);
+ if (~tb->flags & TTYB_NORMAL)
+ memset(flag_buf_ptr(tb, tb->used), TTY_NORMAL, space);
tb->used += space;
}
return space;
}
EXPORT_SYMBOL_GPL(tty_prepare_flip_string);
-/**
- * tty_prepare_flip_string_flags - make room for characters
- * @port: tty port
- * @chars: return pointer for character write area
- * @flags: return pointer for status flag write area
- * @size: desired size
- *
- * Prepare a block of space in the buffer for data. Returns the length
- * available and buffer pointer to the space which is now allocated and
- * accounted for as ready for characters. This is used for drivers
- * that need their own block copy routines into the buffer. There is no
- * guarantee the buffer is a DMA target!
- */
-
-int tty_prepare_flip_string_flags(struct tty_port *port,
- unsigned char **chars, char **flags, size_t size)
-{
- int space = tty_buffer_request_room(port, size);
- if (likely(space)) {
- struct tty_buffer *tb = port->buf.tail;
- *chars = char_buf_ptr(tb, tb->used);
- *flags = flag_buf_ptr(tb, tb->used);
- tb->used += space;
- }
- return space;
-}
-EXPORT_SYMBOL_GPL(tty_prepare_flip_string_flags);
-
static int
receive_buf(struct tty_struct *tty, struct tty_buffer *head, int count)
{
struct tty_ldisc *disc = tty->ldisc;
unsigned char *p = char_buf_ptr(head, head->read);
- char *f = flag_buf_ptr(head, head->read);
+ char *f = NULL;
+
+ if (~head->flags & TTYB_NORMAL)
+ f = flag_buf_ptr(head, head->read);
if (disc->ops->receive_buf2)
count = disc->ops->receive_buf2(tty, p, f, count);
buf->head = &buf->sentinel;
buf->tail = &buf->sentinel;
init_llist_head(&buf->free);
- atomic_set(&buf->memory_used, 0);
+ atomic_set(&buf->mem_used, 0);
atomic_set(&buf->priority, 0);
INIT_WORK(&buf->work, flush_to_ldisc);
+ buf->mem_limit = TTYB_DEFAULT_MEM_LIMIT;
+}
+
+/**
+ * tty_buffer_set_limit - change the tty buffer memory limit
+ * @port: tty port to change
+ *
+ * Change the tty buffer memory limit.
+ * Must be called before the other tty buffer functions are used.
+ */
+
+int tty_buffer_set_limit(struct tty_port *port, int limit)
+{
+ if (limit < MIN_TTYB_SIZE)
+ return -EINVAL;
+ port->buf.mem_limit = limit;
+ return 0;
}
+EXPORT_SYMBOL_GPL(tty_buffer_set_limit);
#include <linux/slab.h>
#include <linux/poll.h>
#include <linux/proc_fs.h>
-#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/wait.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/sched.h>
-#include <linux/init.h>
#include <linux/wait.h>
#include <linux/bitops.h>
#include <linux/delay.h>
#define arch_initcall(fn) module_init(fn)
#define subsys_initcall(fn) module_init(fn)
#define fs_initcall(fn) module_init(fn)
+#define rootfs_initcall(fn) module_init(fn)
#define device_initcall(fn) module_init(fn)
#define late_initcall(fn) module_init(fn)
+#define console_initcall(fn) module_init(fn)
#define security_initcall(fn) module_init(fn)
/* Each module must use one module_init(). */
int size;
int commit;
int read;
+ int flags;
/* Data points here */
unsigned long data[0];
};
+/* Values for .flags field of tty_buffer */
+#define TTYB_NORMAL 1 /* buffer has no flags buffer */
+
static inline unsigned char *char_buf_ptr(struct tty_buffer *b, int ofs)
{
return ((unsigned char *)b->data) + ofs;
atomic_t priority;
struct tty_buffer sentinel;
struct llist_head free; /* Free queue head */
- atomic_t memory_used; /* In-use buffers excluding free list */
+ atomic_t mem_used; /* In-use buffers excluding free list */
+ int mem_limit;
struct tty_buffer *tail; /* Active buffer */
};
/*
extern int tty_signal(int sig, struct tty_struct *tty);
extern void tty_hangup(struct tty_struct *tty);
extern void tty_vhangup(struct tty_struct *tty);
-extern void tty_vhangup_locked(struct tty_struct *tty);
extern void tty_unhangup(struct file *filp);
extern int tty_hung_up_p(struct file *filp);
extern void do_SAK(struct tty_struct *tty);
#ifndef _LINUX_TTY_FLIP_H
#define _LINUX_TTY_FLIP_H
+extern int tty_buffer_set_limit(struct tty_port *port, int limit);
extern int tty_buffer_space_avail(struct tty_port *port);
extern int tty_buffer_request_room(struct tty_port *port, size_t size);
extern int tty_insert_flip_string_flags(struct tty_port *port,
const unsigned char *chars, char flag, size_t size);
extern int tty_prepare_flip_string(struct tty_port *port,
unsigned char **chars, size_t size);
-extern int tty_prepare_flip_string_flags(struct tty_port *port,
- unsigned char **chars, char **flags, size_t size);
extern void tty_flip_buffer_push(struct tty_port *port);
void tty_schedule_flip(struct tty_port *port);
unsigned char ch, char flag)
{
struct tty_buffer *tb = port->buf.tail;
- if (tb && tb->used < tb->size) {
- *flag_buf_ptr(tb, tb->used) = flag;
+ int change;
+
+ change = (tb->flags & TTYB_NORMAL) && (flag != TTY_NORMAL);
+ if (!change && tb->used < tb->size) {
+ if (~tb->flags & TTYB_NORMAL)
+ *flag_buf_ptr(tb, tb->used) = flag;
*char_buf_ptr(tb, tb->used++) = ch;
return 1;
}
* processing. <cp> is a pointer to the buffer of input
* character received by the device. <fp> is a pointer to a
* pointer of flag bytes which indicate whether a character was
- * received with a parity error, etc.
+ * received with a parity error, etc. <fp> may be NULL to indicate
+ * all data received is TTY_NORMAL.
*
* void (*write_wakeup)(struct tty_struct *);
*
* processing. <cp> is a pointer to the buffer of input
* character received by the device. <fp> is a pointer to a
* pointer of flag bytes which indicate whether a character was
- * received with a parity error, etc.
+ * received with a parity error, etc. <fp> may be NULL to indicate
+ * all data received is TTY_NORMAL.
* If assigned, prefer this function for automatic flow control.
*/
projects / ~andy / linux / commitdiff