Merge tag 'tty-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/…

…gregkh/tty

Pull TTY/serial patches from Greg KH:
 "tty and serial merge for 3.4-rc1

  Here's the big serial and tty merge for the 3.4-rc1 tree.

  There's loads of fixes and reworks in here from Jiri for the tty
  layer, and a number of patches from Alan to help try to wrestle the vt
  layer into a sane model.

  Other than that, lots of driver updates and fixes, and other minor
  stuff, all detailed in the shortlog."

* tag 'tty-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (132 commits)
  serial: pxa: add clk_prepare/clk_unprepare calls
  TTY: Wrong unicode value copied in con_set_unimap()
  serial: PL011: clear pending interrupts
  serial: bfin-uart: Don't access tty circular buffer in TX DMA interrupt after it is reset.
  vt: NULL dereference in vt_do_kdsk_ioctl()
  tty: serial: vt8500: fix annotations for probe/remove
  serial: remove back and forth conversions in serial_out_sync
  serial: use serial_port_in/out vs serial_in/out in 8250
  serial: introduce generic port in/out helpers
  serial: reduce number of indirections in 8250 code
  serial: delete useless void casts in 8250.c
  serial: make 8250's serial_in shareable to other drivers.
  serial: delete last unused traces of pausing I/O in 8250
  pch_uart: Add module parameter descriptions
  pch_uart: Use existing default_baud in setup_console
  pch_uart: Add user_uartclk parameter
  pch_uart: Add Fish River Island II uart clock quirks
  pch_uart: Use uartclk instead of base_baud
  mpc5200b/uart: select more tolerant uart prescaler on low baudrates
  tty: moxa: fix bit test in moxa_start()
  ...

Documentation/devicetree/bindings/tty/serial/efm32-uart.txt

@@ -0,0 +1,14 @@
+* Energymicro efm32 UART
+
+Required properties:
+- compatible : Should be "efm32,uart"
+- reg : Address and length of the register set
+- interrupts : Should contain uart interrupt
+
+Example:
+
+uart@0x4000c400 {
+	compatible = "efm32,uart";
+	reg = <0x4000c400 0x400>;
+	interrupts = <15>;
+};

MAINTAINERS

@@ -6212,8 +6212,8 @@ L:	sparclinux@vger.kernel.org
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6.git
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6.git
 S:	Maintained
+F:	include/linux/sunserialcore.h
 F:	drivers/tty/serial/suncore.c
-F:	drivers/tty/serial/suncore.h
 F:	drivers/tty/serial/sunhv.c
 F:	drivers/tty/serial/sunsab.c
 F:	drivers/tty/serial/sunsab.h

arch/alpha/kernel/srmcons.c

@@ -30,10 +30,9 @@ static int srm_is_registered_console = 0;
 #define MAX_SRM_CONSOLE_DEVICES 1	/* only support 1 console device */
 
 struct srmcons_private {
-	struct tty_struct *tty;
+	struct tty_port port;
 	struct timer_list timer;
-	spinlock_t lock;
-};
+} srmcons_singleton;
 
 typedef union _srmcons_result {
 	struct {
@@ -68,22 +67,21 @@ static void
 srmcons_receive_chars(unsigned long data)
 {
 	struct srmcons_private *srmconsp = (struct srmcons_private *)data;
+	struct tty_port *port = &srmconsp->port;
 	unsigned long flags;
 	int incr = 10;
 
 	local_irq_save(flags);
 	if (spin_trylock(&srmcons_callback_lock)) {
-		if (!srmcons_do_receive_chars(srmconsp->tty))
+		if (!srmcons_do_receive_chars(port->tty))
 			incr = 100;
 		spin_unlock(&srmcons_callback_lock);
 	} 
 
-	spin_lock(&srmconsp->lock);
-	if (srmconsp->tty) {
-		srmconsp->timer.expires = jiffies + incr;
-		add_timer(&srmconsp->timer);
-	}
-	spin_unlock(&srmconsp->lock);
+	spin_lock(&port->lock);
+	if (port->tty)
+		mod_timer(&srmconsp->timer, jiffies + incr);
+	spin_unlock(&port->lock);
 
 	local_irq_restore(flags);
 }
@@ -155,57 +153,23 @@ srmcons_chars_in_buffer(struct tty_struct *tty)
 	return 0;
 }
 
-static int
-srmcons_get_private_struct(struct srmcons_private **ps)
-{
-	static struct srmcons_private *srmconsp = NULL;
-	static DEFINE_SPINLOCK(srmconsp_lock);
-	unsigned long flags;
-	int retval = 0;
-
-	if (srmconsp == NULL) {
-		srmconsp = kmalloc(sizeof(*srmconsp), GFP_KERNEL);
-		spin_lock_irqsave(&srmconsp_lock, flags);
-
-		if (srmconsp == NULL)
-			retval = -ENOMEM;
-		else {
-			srmconsp->tty = NULL;
-			spin_lock_init(&srmconsp->lock);
-			init_timer(&srmconsp->timer);
-		}
-
-		spin_unlock_irqrestore(&srmconsp_lock, flags);
-	}
-
-	*ps = srmconsp;
-	return retval;
-}
-
 static int
 srmcons_open(struct tty_struct *tty, struct file *filp)
 {
-	struct srmcons_private *srmconsp;
+	struct srmcons_private *srmconsp = &srmcons_singleton;
+	struct tty_port *port = &srmconsp->port;
 	unsigned long flags;
-	int retval;
-
-	retval = srmcons_get_private_struct(&srmconsp);
-	if (retval)
-		return retval;
 
-	spin_lock_irqsave(&srmconsp->lock, flags);
+	spin_lock_irqsave(&port->lock, flags);
 
-	if (!srmconsp->tty) {
+	if (!port->tty) {
 		tty->driver_data = srmconsp;
-
-		srmconsp->tty = tty;
-		srmconsp->timer.function = srmcons_receive_chars;
-		srmconsp->timer.data = (unsigned long)srmconsp;
-		srmconsp->timer.expires = jiffies + 10;
-		add_timer(&srmconsp->timer);
+		tty->port = port;
+		port->tty = tty; /* XXX proper refcounting */
+		mod_timer(&srmconsp->timer, jiffies + 10);
 	}
 
-	spin_unlock_irqrestore(&srmconsp->lock, flags);
+	spin_unlock_irqrestore(&port->lock, flags);
 
 	return 0;
 }
@@ -214,16 +178,17 @@ static void
 srmcons_close(struct tty_struct *tty, struct file *filp)
 {
 	struct srmcons_private *srmconsp = tty->driver_data;
+	struct tty_port *port = &srmconsp->port;
 	unsigned long flags;
 
-	spin_lock_irqsave(&srmconsp->lock, flags);
+	spin_lock_irqsave(&port->lock, flags);
 
 	if (tty->count == 1) {
-		srmconsp->tty = NULL;
+		port->tty = NULL;
 		del_timer(&srmconsp->timer);
 	}
 
-	spin_unlock_irqrestore(&srmconsp->lock, flags);
+	spin_unlock_irqrestore(&port->lock, flags);
 }
 
 
@@ -240,6 +205,9 @@ static const struct tty_operations srmcons_ops = {
 static int __init
 srmcons_init(void)
 {
+	tty_port_init(&srmcons_singleton.port);
+	setup_timer(&srmcons_singleton.timer, srmcons_receive_chars,
+			(unsigned long)&srmcons_singleton);
 	if (srm_is_registered_console) {
 		struct tty_driver *driver;
 		int err;

arch/ia64/hp/sim/boot/fw-emu.c

@@ -160,28 +160,19 @@ sal_emulator (long index, unsigned long in1, unsigned long in2,
 	 */
 	status = 0;
 	if (index == SAL_FREQ_BASE) {
-		switch (in1) {
-		      case SAL_FREQ_BASE_PLATFORM:
+		if (in1 == SAL_FREQ_BASE_PLATFORM)
 			r9 = 200000000;
-			break;
-
-		      case SAL_FREQ_BASE_INTERVAL_TIMER:
+		else if (in1 == SAL_FREQ_BASE_INTERVAL_TIMER) {
 			/*
 			 * Is this supposed to be the cr.itc frequency
 			 * or something platform specific?  The SAL
 			 * doc ain't exactly clear on this...
 			 */
 			r9 = 700000000;
-			break;
-
-		      case SAL_FREQ_BASE_REALTIME_CLOCK:
+		} else if (in1 == SAL_FREQ_BASE_REALTIME_CLOCK)
 			r9 = 1;
-			break;
-
-		      default:
+		else
 			status = -1;
-			break;
-		}
 	} else if (index == SAL_SET_VECTORS) {
 		;
 	} else if (index == SAL_GET_STATE_INFO) {

arch/ia64/hp/sim/hpsim_irq.c

@@ -10,6 +10,8 @@
 #include <linux/sched.h>
 #include <linux/irq.h>
 
+#include "hpsim_ssc.h"
+
 static unsigned int
 hpsim_irq_startup(struct irq_data *data)
 {
@@ -37,15 +39,37 @@ static struct irq_chip irq_type_hp_sim = {
 	.irq_set_affinity =	hpsim_set_affinity_noop,
 };
 
+static void hpsim_irq_set_chip(int irq)
+{
+	struct irq_chip *chip = irq_get_chip(irq);
+
+	if (chip == &no_irq_chip)
+		irq_set_chip(irq, &irq_type_hp_sim);
+}
+
+static void hpsim_connect_irq(int intr, int irq)
+{
+	ia64_ssc(intr, irq, 0, 0, SSC_CONNECT_INTERRUPT);
+}
+
+int hpsim_get_irq(int intr)
+{
+	int irq = assign_irq_vector(AUTO_ASSIGN);
+
+	if (irq >= 0) {
+		hpsim_irq_set_chip(irq);
+		irq_set_handler(irq, handle_simple_irq);
+		hpsim_connect_irq(intr, irq);
+	}
+
+	return irq;
+}
+
 void __init
 hpsim_irq_init (void)
 {
 	int i;
 
-	for_each_active_irq(i) {
-		struct irq_chip *chip = irq_get_chip(i);
-
-		if (chip == &no_irq_chip)
-			irq_set_chip(i, &irq_type_hp_sim);
-	}
+	for_each_active_irq(i)
+		hpsim_irq_set_chip(i);
 }

arch/ia64/hp/sim/hpsim_setup.c

@@ -25,12 +25,6 @@
 
 #include "hpsim_ssc.h"
 
-void
-ia64_ssc_connect_irq (long intr, long irq)
-{
-	ia64_ssc(intr, irq, 0, 0, SSC_CONNECT_INTERRUPT);
-}
-
 void
 ia64_ctl_trace (long on)
 {

arch/ia64/hp/sim/simeth.c

@@ -128,17 +128,6 @@ netdev_probe(char *name, unsigned char *ether)
 }
 
 
-static inline int
-netdev_connect(int irq)
-{
-	/* XXX Fix me
-	 * this does not support multiple cards
-	 * also no return value
-	 */
-	ia64_ssc_connect_irq(NETWORK_INTR, irq);
-	return 0;
-}
-
 static inline int
 netdev_attach(int fd, int irq, unsigned int ipaddr)
 {
@@ -226,15 +215,13 @@ simeth_probe1(void)
 		return err;
 	}
 
-	if ((rc = assign_irq_vector(AUTO_ASSIGN)) < 0)
-		panic("%s: out of interrupt vectors!\n", __func__);
-	dev->irq = rc;
-
 	/*
 	 * attach the interrupt in the simulator, this does enable interrupts
 	 * until a netdev_attach() is called
 	 */
-	netdev_connect(dev->irq);
+	if ((rc = hpsim_get_irq(NETWORK_INTR)) < 0)
+		panic("%s: out of interrupt vectors!\n", __func__);
+	dev->irq = rc;
 
 	printk(KERN_INFO "%s: hosteth=%s simfd=%d, HwAddr",
 	       dev->name, simeth_device, local->simfd);