Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

5 files changed, 266 insertions, 36 deletions

diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index 2f5a5ac1b271..f94109cbb46e 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -129,7 +129,16 @@ struct uart_8250_port {
 	unsigned char		mcr;
 	unsigned char		mcr_mask;	/* mask of user bits */
 	unsigned char		mcr_force;	/* mask of forced bits */
-	unsigned char		lsr_break_flag;
+
+	/*
+	 * Some bits in registers are cleared on a read, so they must
+	 * be saved whenever the register is read but the bits will not
+	 * be immediately processed.
+	 */
+#define LSR_SAVE_FLAGS UART_LSR_BRK_ERROR_BITS
+	unsigned char		lsr_saved_flags;
+#define MSR_SAVE_FLAGS UART_MSR_ANY_DELTA
+	unsigned char		msr_saved_flags;
 
 	/*
 	 * We provide a per-port pm hook.
@@ -1238,6 +1247,7 @@ static void serial8250_start_tx(struct uart_port *port)
 		if (up->bugs & UART_BUG_TXEN) {
 			unsigned char lsr, iir;
 			lsr = serial_in(up, UART_LSR);
+			up->lsr_saved_flags |= lsr & LSR_SAVE_FLAGS;
 			iir = serial_in(up, UART_IIR) & 0x0f;
 			if ((up->port.type == PORT_RM9000) ?
 				(lsr & UART_LSR_THRE &&
@@ -1290,18 +1300,10 @@ receive_chars(struct uart_8250_port *up, unsigned int *status)
 		flag = TTY_NORMAL;
 		up->port.icount.rx++;
 
-#ifdef CONFIG_SERIAL_8250_CONSOLE
-		/*
-		 * Recover the break flag from console xmit
-		 */
-		if (up->port.line == up->port.cons->index) {
-			lsr |= up->lsr_break_flag;
-			up->lsr_break_flag = 0;
-		}
-#endif
+		lsr |= up->lsr_saved_flags;
+		up->lsr_saved_flags = 0;
 
-		if (unlikely(lsr & (UART_LSR_BI | UART_LSR_PE |
-				    UART_LSR_FE | UART_LSR_OE))) {
+		if (unlikely(lsr & UART_LSR_BRK_ERROR_BITS)) {
 			/*
 			 * For statistics only
 			 */
@@ -1392,6 +1394,8 @@ static unsigned int check_modem_status(struct uart_8250_port *up)
 {
 	unsigned int status = serial_in(up, UART_MSR);
 
+	status |= up->msr_saved_flags;
+	up->msr_saved_flags = 0;
 	if (status & UART_MSR_ANY_DELTA && up->ier & UART_IER_MSI &&
 	    up->port.info != NULL) {
 		if (status & UART_MSR_TERI)
@@ -1591,7 +1595,8 @@ static void serial8250_timeout(unsigned long data)
 static void serial8250_backup_timeout(unsigned long data)
 {
 	struct uart_8250_port *up = (struct uart_8250_port *)data;
-	unsigned int iir, ier = 0;
+	unsigned int iir, ier = 0, lsr;
+	unsigned long flags;
 
 	/*
 	 * Must disable interrupts or else we risk racing with the interrupt
@@ -1610,9 +1615,13 @@ static void serial8250_backup_timeout(unsigned long data)
 	 * the "Diva" UART used on the management processor on many HP
 	 * ia64 and parisc boxes.
 	 */
+	spin_lock_irqsave(&up->port.lock, flags);
+	lsr = serial_in(up, UART_LSR);
+	up->lsr_saved_flags |= lsr & LSR_SAVE_FLAGS;
+	spin_unlock_irqrestore(&up->port.lock, flags);
 	if ((iir & UART_IIR_NO_INT) && (up->ier & UART_IER_THRI) &&
 	    (!uart_circ_empty(&up->port.info->xmit) || up->port.x_char) &&
-	    (serial_in(up, UART_LSR) & UART_LSR_THRE)) {
+	    (lsr & UART_LSR_THRE)) {
 		iir &= ~(UART_IIR_ID | UART_IIR_NO_INT);
 		iir |= UART_IIR_THRI;
 	}
@@ -1631,13 +1640,14 @@ static unsigned int serial8250_tx_empty(struct uart_port *port)
 {
 	struct uart_8250_port *up = (struct uart_8250_port *)port;
 	unsigned long flags;
-	unsigned int ret;
+	unsigned int lsr;
 
 	spin_lock_irqsave(&up->port.lock, flags);
-	ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0;
+	lsr = serial_in(up, UART_LSR);
+	up->lsr_saved_flags |= lsr & LSR_SAVE_FLAGS;
 	spin_unlock_irqrestore(&up->port.lock, flags);
 
-	return ret;
+	return lsr & UART_LSR_TEMT ? TIOCSER_TEMT : 0;
 }
 
 static unsigned int serial8250_get_mctrl(struct uart_port *port)
@@ -1708,8 +1718,7 @@ static inline void wait_for_xmitr(struct uart_8250_port *up, int bits)
 	do {
 		status = serial_in(up, UART_LSR);
 
-		if (status & UART_LSR_BI)
-			up->lsr_break_flag = UART_LSR_BI;
+		up->lsr_saved_flags |= status & LSR_SAVE_FLAGS;
 
 		if (--tmout == 0)
 			break;
@@ -1718,8 +1727,12 @@ static inline void wait_for_xmitr(struct uart_8250_port *up, int bits)
 
 	/* Wait up to 1s for flow control if necessary */
 	if (up->port.flags & UPF_CONS_FLOW) {
-		tmout = 1000000;
-		while (!(serial_in(up, UART_MSR) & UART_MSR_CTS) && --tmout) {
+		unsigned int tmout;
+		for (tmout = 1000000; tmout; tmout--) {
+			unsigned int msr = serial_in(up, UART_MSR);
+			up->msr_saved_flags |= msr & MSR_SAVE_FLAGS;
+			if (msr & UART_MSR_CTS)
+				break;
 			udelay(1);
 			touch_nmi_watchdog();
 		}
@@ -1889,6 +1902,18 @@ static int serial8250_startup(struct uart_port *port)
 	spin_unlock_irqrestore(&up->port.lock, flags);
 
 	/*
+	 * Clear the interrupt registers again for luck, and clear the
+	 * saved flags to avoid getting false values from polling
+	 * routines or the previous session.
+	 */
+	serial_inp(up, UART_LSR);
+	serial_inp(up, UART_RX);
+	serial_inp(up, UART_IIR);
+	serial_inp(up, UART_MSR);
+	up->lsr_saved_flags = 0;
+	up->msr_saved_flags = 0;
+
+	/*
 	 * Finally, enable interrupts.  Note: Modem status interrupts
 	 * are set via set_termios(), which will be occurring imminently
 	 * anyway, so we don't enable them here.
@@ -1906,14 +1931,6 @@ static int serial8250_startup(struct uart_port *port)
 		(void) inb_p(icp);
 	}
 
-	/*
-	 * And clear the interrupt registers again for luck.
-	 */
-	(void) serial_inp(up, UART_LSR);
-	(void) serial_inp(up, UART_RX);
-	(void) serial_inp(up, UART_IIR);
-	(void) serial_inp(up, UART_MSR);
-
 	return 0;
 }
 
@@ -2484,6 +2501,16 @@ serial8250_console_write(struct console *co, const char *s, unsigned int count)
 	wait_for_xmitr(up, BOTH_EMPTY);
 	serial_out(up, UART_IER, ier);
 
+	/*
+	 *	The receive handling will happen properly because the
+	 *	receive ready bit will still be set; it is not cleared
+	 *	on read.  However, modem control will not, we must
+	 *	call it if we have saved something in the saved flags
+	 *	while processing with interrupts off.
+	 */
+	if (up->msr_saved_flags)
+		check_modem_status(up);
+
 	if (locked)
 		spin_unlock(&up->port.lock);
 	local_irq_restore(flags);
@@ -2514,7 +2541,7 @@ static int __init serial8250_console_setup(struct console *co, char *options)
 	return uart_set_options(port, co, baud, parity, bits, flow);
 }
 
-static int __init serial8250_console_early_setup(void)
+static int serial8250_console_early_setup(void)
 {
 	return serial8250_find_port_for_earlycon();
 }
diff --git a/drivers/serial/8250_early.c b/drivers/serial/8250_early.c
index 150cad5c2eba..4d4c9f01be8d 100644
--- a/drivers/serial/8250_early.c
+++ b/drivers/serial/8250_early.c
@@ -227,7 +227,7 @@ int __init setup_early_serial8250_console(char *cmdline)
 	return 0;
 }
 
-int __init serial8250_find_port_for_earlycon(void)
+int serial8250_find_port_for_earlycon(void)
 {
 	struct early_serial8250_device *device = &early_device;
 	struct uart_port *port = &device->port;
diff --git a/drivers/serial/8250_pci.c b/drivers/serial/8250_pci.c
index 5e485876f54c..bd66339f7a3f 100644
--- a/drivers/serial/8250_pci.c
+++ b/drivers/serial/8250_pci.c
@@ -580,6 +580,138 @@ static int pci_netmos_init(struct pci_dev *dev)
 	return num_serial;
 }
 
+/*
+ * ITE support by Niels de Vos <niels.devos@wincor-nixdorf.com>
+ *
+ * These chips are available with optionally one parallel port and up to
+ * two serial ports. Unfortunately they all have the same product id.
+ *
+ * Basic configuration is done over a region of 32 I/O ports. The base
+ * ioport is called INTA or INTC, depending on docs/other drivers.
+ *
+ * The region of the 32 I/O ports is configured in POSIO0R...
+ */
+
+/* registers */
+#define ITE_887x_MISCR		0x9c
+#define ITE_887x_INTCBAR	0x78
+#define ITE_887x_UARTBAR	0x7c
+#define ITE_887x_PS0BAR		0x10
+#define ITE_887x_POSIO0		0x60
+
+/* I/O space size */
+#define ITE_887x_IOSIZE		32
+/* I/O space size (bits 26-24; 8 bytes = 011b) */
+#define ITE_887x_POSIO_IOSIZE_8		(3 << 24)
+/* I/O space size (bits 26-24; 32 bytes = 101b) */
+#define ITE_887x_POSIO_IOSIZE_32	(5 << 24)
+/* Decoding speed (1 = slow, 2 = medium, 3 = fast) */
+#define ITE_887x_POSIO_SPEED		(3 << 29)
+/* enable IO_Space bit */
+#define ITE_887x_POSIO_ENABLE		(1 << 31)
+
+static int __devinit pci_ite887x_init(struct pci_dev *dev)
+{
+	/* inta_addr are the configuration addresses of the ITE */
+	static const short inta_addr[] = { 0x2a0, 0x2c0, 0x220, 0x240, 0x1e0,
+							0x200, 0x280, 0 };
+	int ret, i, type;
+	struct resource *iobase = NULL;
+	u32 miscr, uartbar, ioport;
+
+	/* search for the base-ioport */
+	i = 0;
+	while (inta_addr[i] && iobase == NULL) {
+		iobase = request_region(inta_addr[i], ITE_887x_IOSIZE,
+								"ite887x");
+		if (iobase != NULL) {
+			/* write POSIO0R - speed | size | ioport */
+			pci_write_config_dword(dev, ITE_887x_POSIO0,
+				ITE_887x_POSIO_ENABLE | ITE_887x_POSIO_SPEED |
+				ITE_887x_POSIO_IOSIZE_32 | inta_addr[i]);
+			/* write INTCBAR - ioport */
+			pci_write_config_dword(dev, ITE_887x_INTCBAR, inta_addr[i]);
+			ret = inb(inta_addr[i]);
+			if (ret != 0xff) {
+				/* ioport connected */
+				break;
+			}
+			release_region(iobase->start, ITE_887x_IOSIZE);
+			iobase = NULL;
+		}
+		i++;
+	}
+
+	if (!inta_addr[i]) {
+		printk(KERN_ERR "ite887x: could not find iobase\n");
+		return -ENODEV;
+	}
+
+	/* start of undocumented type checking (see parport_pc.c) */
+	type = inb(iobase->start + 0x18) & 0x0f;
+
+	switch (type) {
+	case 0x2:	/* ITE8871 (1P) */
+	case 0xa:	/* ITE8875 (1P) */
+		ret = 0;
+		break;
+	case 0xe:	/* ITE8872 (2S1P) */
+		ret = 2;
+		break;
+	case 0x6:	/* ITE8873 (1S) */
+		ret = 1;
+		break;
+	case 0x8:	/* ITE8874 (2S) */
+		ret = 2;
+		break;
+	default:
+		moan_device("Unknown ITE887x", dev);
+		ret = -ENODEV;
+	}
+
+	/* configure all serial ports */
+	for (i = 0; i < ret; i++) {
+		/* read the I/O port from the device */
+		pci_read_config_dword(dev, ITE_887x_PS0BAR + (0x4 * (i + 1)),
+								&ioport);
+		ioport &= 0x0000FF00;	/* the actual base address */
+		pci_write_config_dword(dev, ITE_887x_POSIO0 + (0x4 * (i + 1)),
+			ITE_887x_POSIO_ENABLE | ITE_887x_POSIO_SPEED |
+			ITE_887x_POSIO_IOSIZE_8 | ioport);
+
+		/* write the ioport to the UARTBAR */
+		pci_read_config_dword(dev, ITE_887x_UARTBAR, &uartbar);
+		uartbar &= ~(0xffff << (16 * i));	/* clear half the reg */
+		uartbar |= (ioport << (16 * i));	/* set the ioport */
+		pci_write_config_dword(dev, ITE_887x_UARTBAR, uartbar);
+
+		/* get current config */
+		pci_read_config_dword(dev, ITE_887x_MISCR, &miscr);
+		/* disable interrupts (UARTx_Routing[3:0]) */
+		miscr &= ~(0xf << (12 - 4 * i));
+		/* activate the UART (UARTx_En) */
+		miscr |= 1 << (23 - i);
+		/* write new config with activated UART */
+		pci_write_config_dword(dev, ITE_887x_MISCR, miscr);
+	}
+
+	if (ret <= 0) {
+		/* the device has no UARTs if we get here */
+		release_region(iobase->start, ITE_887x_IOSIZE);
+	}
+
+	return ret;
+}
+
+static void __devexit pci_ite887x_exit(struct pci_dev *dev)
+{
+	u32 ioport;
+	/* the ioport is bit 0-15 in POSIO0R */
+	pci_read_config_dword(dev, ITE_887x_POSIO0, &ioport);
+	ioport &= 0xffff;
+	release_region(ioport, ITE_887x_IOSIZE);
+}
+
 static int
 pci_default_setup(struct serial_private *priv, struct pciserial_board *board,
 		  struct uart_port *port, int idx)
@@ -653,6 +785,18 @@ static struct pci_serial_quirk pci_serial_quirks[] = {
 		.setup		= pci_default_setup,
 	},
 	/*
+	 * ITE
+	 */
+	{
+		.vendor		= PCI_VENDOR_ID_ITE,
+		.device		= PCI_DEVICE_ID_ITE_8872,
+		.subvendor	= PCI_ANY_ID,
+		.subdevice	= PCI_ANY_ID,
+		.init		= pci_ite887x_init,
+		.setup		= pci_default_setup,
+		.exit		= __devexit_p(pci_ite887x_exit),
+	},
+	/*
 	 * Panacom
 	 */
 	{
@@ -933,6 +1077,7 @@ enum pci_board_num_t {
 
 	pbn_b1_2_1250000,
 
+	pbn_b1_bt_1_115200,
 	pbn_b1_bt_2_921600,
 
 	pbn_b1_1_1382400,
@@ -983,6 +1128,7 @@ enum pci_board_num_t {
 	pbn_exar_XR17C152,
 	pbn_exar_XR17C154,
 	pbn_exar_XR17C158,
+	pbn_pasemi_1682M,
 };
 
 /*
@@ -1211,6 +1357,13 @@ static struct pciserial_board pci_boards[] __devinitdata = {
 		.uart_offset	= 8,
 	},
 
+	[pbn_b1_bt_1_115200] = {
+		.flags		= FL_BASE1|FL_BASE_BARS,
+		.num_ports	= 1,
+		.base_baud	= 115200,
+		.uart_offset	= 8,
+	},
+
 	[pbn_b1_bt_2_921600] = {
 		.flags		= FL_BASE1|FL_BASE_BARS,
 		.num_ports	= 2,
@@ -1498,6 +1651,18 @@ static struct pciserial_board pci_boards[] __devinitdata = {
 		.base_baud	= 921600,
 		.uart_offset	= 0x200,
 	},
+	/*
+	 * PA Semi PWRficient PA6T-1682M on-chip UART
+	 */
+	[pbn_pasemi_1682M] = {
+		.flags		= FL_BASE0,
+		.num_ports	= 1,
+		.base_baud	= 8333333,
+	},
+};
+
+static const struct pci_device_id softmodem_blacklist[] = {
+	{ PCI_VDEVICE ( AL, 0x5457 ), }, /* ALi Corporation M5457 AC'97 Modem */
 };
 
 /*
@@ -1508,6 +1673,7 @@ static struct pciserial_board pci_boards[] __devinitdata = {
 static int __devinit
 serial_pci_guess_board(struct pci_dev *dev, struct pciserial_board *board)
 {
+	const struct pci_device_id *blacklist;
 	int num_iomem, num_port, first_port = -1, i;
 	
 	/*
@@ -1522,6 +1688,18 @@ serial_pci_guess_board(struct pci_dev *dev, struct pciserial_board *board)
 	    (dev->class & 0xff) > 6)
 		return -ENODEV;
 
+	/*
+	 * Do not access blacklisted devices that are known not to
+	 * feature serial ports.
+	 */
+	for (blacklist = softmodem_blacklist;
+	     blacklist < softmodem_blacklist + ARRAY_SIZE(softmodem_blacklist);
+	     blacklist++) {
+		if (dev->vendor == blacklist->vendor &&
+		    dev->device == blacklist->device)
+			return -ENODEV;
+	}
+
 	num_iomem = num_port = 0;
 	for (i = 0; i < PCI_NUM_BAR_RESOURCES; i++) {
 		if (pci_resource_flags(dev, i) & IORESOURCE_IO) {
@@ -2364,6 +2542,13 @@ static struct pci_device_id serial_pci_tbl[] = {
 	{	PCI_VENDOR_ID_TOPIC, PCI_DEVICE_ID_TOPIC_TP560,
 		PCI_ANY_ID, PCI_ANY_ID, 0, 0,
 		pbn_b0_1_115200 },
+	/*
+	 * ITE
+	 */
+	{	PCI_VENDOR_ID_ITE, PCI_DEVICE_ID_ITE_8872,
+		PCI_ANY_ID, PCI_ANY_ID,
+		0, 0,
+		pbn_b1_bt_1_115200 },
 
 	/*
 	 * IntaShield IS-200
@@ -2382,6 +2567,13 @@ static struct pci_device_id serial_pci_tbl[] = {
 		PCI_SUBVENDOR_ID_PERLE, PCI_SUBDEVICE_ID_PCI_RAS8,
 		0, 0, pbn_b2_8_921600 },
 	/*
+	 * PA Semi PA6T-1682M on-chip UART
+	 */
+	{	PCI_VENDOR_ID_PASEMI, 0xa004,
+		PCI_ANY_ID, PCI_ANY_ID, 0, 0,
+		pbn_pasemi_1682M },
+
+	/*
 	 * These entries match devices with class COMMUNICATION_SERIAL,
 	 * COMMUNICATION_MODEM or COMMUNICATION_MULTISERIAL
 	 */
diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c
index 030a6063541d..a055f58f342f 100644
--- a/drivers/serial/serial_core.c
+++ b/drivers/serial/serial_core.c
@@ -1146,11 +1146,14 @@ static void uart_set_termios(struct tty_struct *tty, struct ktermios *old_termio
 
 	/*
 	 * These are the bits that are used to setup various
-	 * flags in the low level driver.
+	 * flags in the low level driver. We can ignore the Bfoo
+	 * bits in c_cflag; c_[io]speed will always be set
+	 * appropriately by set_termios() in tty_ioctl.c
 	 */
 #define RELEVANT_IFLAG(iflag)	((iflag) & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
-
 	if ((cflag ^ old_termios->c_cflag) == 0 &&
+	    tty->termios->c_ospeed == old_termios->c_ospeed &&
+	    tty->termios->c_ispeed == old_termios->c_ispeed &&
 	    RELEVANT_IFLAG(tty->termios->c_iflag ^ old_termios->c_iflag) == 0)
 		return;
 
diff --git a/drivers/serial/serial_txx9.c b/drivers/serial/serial_txx9.c
index b8f91e018b21..0930e2a85514 100644
--- a/drivers/serial/serial_txx9.c
+++ b/drivers/serial/serial_txx9.c
@@ -37,7 +37,7 @@
 
 #include <asm/io.h>
 
-static char *serial_version = "1.09";
+static char *serial_version = "1.10";
 static char *serial_name = "TX39/49 Serial driver";
 
 #define PASS_LIMIT	256
@@ -436,8 +436,10 @@ static unsigned int serial_txx9_get_mctrl(struct uart_port *port)
 	struct uart_txx9_port *up = (struct uart_txx9_port *)port;
 	unsigned int ret;
 
-	ret =  ((sio_in(up, TXX9_SIFLCR) & TXX9_SIFLCR_RTSSC) ? 0 : TIOCM_RTS)
-		| ((sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS) ? 0 : TIOCM_CTS);
+	/* no modem control lines */
+	ret = TIOCM_CAR | TIOCM_DSR;
+	ret |= (sio_in(up, TXX9_SIFLCR) & TXX9_SIFLCR_RTSSC) ? 0 : TIOCM_RTS;
+	ret |= (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS) ? 0 : TIOCM_CTS;
 
 	return ret;
 }
@@ -557,6 +559,12 @@ serial_txx9_set_termios(struct uart_port *port, struct ktermios *termios,
 	unsigned long flags;
 	unsigned int baud, quot;
 
+	/*
+	 * We don't support modem control lines.
+	 */
+	termios->c_cflag &= ~(HUPCL | CMSPAR);
+	termios->c_cflag |= CLOCAL;
+
 	cval = sio_in(up, TXX9_SILCR);
 	/* byte size and parity */
 	cval &= ~TXX9_SILCR_UMODE_MASK;