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Merge tag 'tty-3.3-rc3' tty-next 

This is needed to handle the 8250 file merge mess properly for future
patches.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2012-02-10 10:23:43 -08:00
parent 19e00f2f1d 418a936e84
commit 5a22e30def
34 changed files with 1152 additions and 230 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
Documentation/devicetree/bindings/tty/serial/efm32-uart.txt Normal file
View File

@ -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>;
};

9
drivers/isdn/capi/capi.c
View File

@ -1015,14 +1015,11 @@ capinc_tty_install(struct tty_driver *driver, struct tty_struct *tty)
{
int idx = tty->index;
struct capiminor *mp = capiminor_get(idx);
int ret = tty_init_termios(tty);
int ret = tty_standard_install(driver, tty);
if (ret == 0) {
tty_driver_kref_get(driver);
tty->count++;
if (ret == 0)
tty->driver_data = mp;
driver->ttys[idx] = tty;
} else
else
capiminor_put(mp);
return ret;
}

6
drivers/misc/pti.c
View File

@ -481,13 +481,9 @@ static int pti_tty_install(struct tty_driver *driver, struct tty_struct *tty)
{
int idx = tty->index;
struct pti_tty *pti_tty_data;
int ret = tty_init_termios(tty);
int ret = tty_standard_install(driver, tty);
if (ret == 0) {
tty_driver_kref_get(driver);
tty->count++;
driver->ttys[idx] = tty;
pti_tty_data = kmalloc(sizeof(struct pti_tty), GFP_KERNEL);
if (pti_tty_data == NULL)
return -ENOMEM;

9
drivers/mmc/card/sdio_uart.c
View File

@ -750,15 +750,12 @@ static int sdio_uart_install(struct tty_driver *driver, struct tty_struct *tty)
{
int idx = tty->index;
struct sdio_uart_port *port = sdio_uart_port_get(idx);
int ret = tty_init_termios(tty);
int ret = tty_standard_install(driver, tty);
if (ret == 0) {
tty_driver_kref_get(driver);
tty->count++;
if (ret == 0)
/* This is the ref sdio_uart_port get provided */
tty->driver_data = port;
driver->ttys[idx] = tty;
} else
else
sdio_uart_port_put(port);
return ret;
}

2
drivers/tty/hvc/hvc_beat.c
View File

@ -113,7 +113,7 @@ static int __init hvc_beat_init(void)
if (!firmware_has_feature(FW_FEATURE_BEAT))
return -ENODEV;
hp = hvc_alloc(0, NO_IRQ, &hvc_beat_get_put_ops, 16);
hp = hvc_alloc(0, 0, &hvc_beat_get_put_ops, 16);
if (IS_ERR(hp))
return PTR_ERR(hp);
hvc_beat_dev = hp;

2
drivers/tty/hvc/hvc_rtas.c
View File

@ -94,7 +94,7 @@ static int __init hvc_rtas_init(void)
/* Allocate an hvc_struct for the console device we instantiated
* earlier. Save off hp so that we can return it on exit */
hp = hvc_alloc(hvc_rtas_cookie, NO_IRQ, &hvc_rtas_get_put_ops, 16);
hp = hvc_alloc(hvc_rtas_cookie, 0, &hvc_rtas_get_put_ops, 16);
if (IS_ERR(hp))
return PTR_ERR(hp);

2
drivers/tty/hvc/hvc_udbg.c
View File

@ -69,7 +69,7 @@ static int __init hvc_udbg_init(void)
BUG_ON(hvc_udbg_dev);
hp = hvc_alloc(0, NO_IRQ, &hvc_udbg_ops, 16);
hp = hvc_alloc(0, 0, &hvc_udbg_ops, 16);
if (IS_ERR(hp))
return PTR_ERR(hp);

2
drivers/tty/hvc/hvc_xen.c
View File

@ -176,7 +176,7 @@ static int __init xen_hvc_init(void)
xencons_irq = bind_evtchn_to_irq(xen_start_info->console.domU.evtchn);
}
if (xencons_irq < 0)
xencons_irq = 0; /* NO_IRQ */
xencons_irq = 0;
else
irq_set_noprobe(xencons_irq);

4
drivers/tty/hvc/hvcs.c
View File

@ -1203,7 +1203,7 @@ static void hvcs_close(struct tty_struct *tty, struct file *filp)
{
struct hvcs_struct *hvcsd;
unsigned long flags;
int irq = NO_IRQ;
int irq;
/*
* Is someone trying to close the file associated with this device after
@ -1264,7 +1264,7 @@ static void hvcs_hangup(struct tty_struct * tty)
struct hvcs_struct *hvcsd = tty->driver_data;
unsigned long flags;
int temp_open_count;
int irq = NO_IRQ;
int irq;
spin_lock_irqsave(&hvcsd->lock, flags);
/* Preserve this so that we know how many kref refs to put */

2
drivers/tty/hvc/hvsi.c
View File

@ -1237,7 +1237,7 @@ static int __init hvsi_console_init(void)
hp->state = HVSI_CLOSED;
hp->vtermno = *vtermno;
hp->virq = irq_create_mapping(NULL, irq[0]);
if (hp->virq == NO_IRQ) {
if (hp->virq == 0) {
printk(KERN_ERR "%s: couldn't create irq mapping for 0x%x\n",
__func__, irq[0]);
continue;

8
drivers/tty/nozomi.c
View File

@ -1602,13 +1602,9 @@ static int ntty_install(struct tty_driver *driver, struct tty_struct *tty)
int ret;
if (!port || !dc || dc->state != NOZOMI_STATE_READY)
return -ENODEV;
ret = tty_init_termios(tty);
if (ret == 0) {
tty_driver_kref_get(driver);
tty->count++;
ret = tty_standard_install(driver, tty);
if (ret == 0)
tty->driver_data = port;
driver->ttys[tty->index] = tty;
}
return ret;
}

68
drivers/tty/pty.c
View File

@ -21,7 +21,6 @@
#include <linux/major.h>
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/sysctl.h>
#include <linux/device.h>
#include <linux/uaccess.h>
#include <linux/bitops.h>
@ -55,11 +54,8 @@ static void pty_close(struct tty_struct *tty, struct file *filp)
wake_up_interruptible(&tty->link->write_wait);
if (tty->driver->subtype == PTY_TYPE_MASTER) {
set_bit(TTY_OTHER_CLOSED, &tty->flags);
#ifdef CONFIG_UNIX98_PTYS
if (tty->driver == ptm_driver)
devpts_pty_kill(tty->link);
#endif
tty_unlock();
devpts_pty_kill(tty->link);
tty_vhangup(tty->link);
tty_lock();
}
@ -439,55 +435,9 @@ static inline void legacy_pty_init(void) { }
/* Unix98 devices */
#ifdef CONFIG_UNIX98_PTYS
/*
* sysctl support for setting limits on the number of Unix98 ptys allocated.
* Otherwise one can eat up all kernel memory by opening /dev/ptmx repeatedly.
*/
int pty_limit = NR_UNIX98_PTY_DEFAULT;
static int pty_limit_min;
static int pty_limit_max = NR_UNIX98_PTY_MAX;
static int pty_count;
static struct cdev ptmx_cdev;
static struct ctl_table pty_table[] = {
{
.procname = "max",
.maxlen = sizeof(int),
.mode = 0644,
.data = &pty_limit,
.proc_handler = proc_dointvec_minmax,
.extra1 = &pty_limit_min,
.extra2 = &pty_limit_max,
}, {
.procname = "nr",
.maxlen = sizeof(int),
.mode = 0444,
.data = &pty_count,
.proc_handler = proc_dointvec,
},
{}
};
static struct ctl_table pty_kern_table[] = {
{
.procname = "pty",
.mode = 0555,
.child = pty_table,
},
{}
};
static struct ctl_table pty_root_table[] = {
{
.procname = "kernel",
.mode = 0555,
.child = pty_kern_table,
},
{}
};
static int pty_unix98_ioctl(struct tty_struct *tty,
unsigned int cmd, unsigned long arg)
{
@ -515,10 +465,8 @@ static int pty_unix98_ioctl(struct tty_struct *tty,
static struct tty_struct *ptm_unix98_lookup(struct tty_driver *driver,
struct inode *ptm_inode, int idx)
{
struct tty_struct *tty = devpts_get_tty(ptm_inode, idx);
if (tty)
tty = tty->link;
return tty;
/* Master must be open via /dev/ptmx */
return ERR_PTR(-EIO);
}
/**
@ -589,7 +537,6 @@ static int pty_unix98_install(struct tty_driver *driver, struct tty_struct *tty)
*/
tty_driver_kref_get(driver);
tty->count++;
pty_count++;
return 0;
err_free_mem:
deinitialize_tty_struct(o_tty);
@ -603,7 +550,6 @@ err_free_tty:
static void ptm_unix98_remove(struct tty_driver *driver, struct tty_struct *tty)
{
pty_count--;
}
static void pts_unix98_remove(struct tty_driver *driver, struct tty_struct *tty)
@ -667,9 +613,7 @@ static int ptmx_open(struct inode *inode, struct file *filp)
return retval;
/* find a device that is not in use. */
tty_lock();
index = devpts_new_index(inode);
tty_unlock();
if (index < 0) {
retval = index;
goto err_file;
@ -677,7 +621,7 @@ static int ptmx_open(struct inode *inode, struct file *filp)
mutex_lock(&tty_mutex);
tty_lock();
tty = tty_init_dev(ptm_driver, index, 1);
tty = tty_init_dev(ptm_driver, index);
mutex_unlock(&tty_mutex);
if (IS_ERR(tty)) {
@ -704,8 +648,8 @@ err_release:
tty_release(inode, filp);
return retval;
out:
devpts_kill_index(inode, index);
tty_unlock();
devpts_kill_index(inode, index);
err_file:
tty_free_file(filp);
return retval;
@ -762,8 +706,6 @@ static void __init unix98_pty_init(void)
if (tty_register_driver(pts_driver))
panic("Couldn't register Unix98 pts driver");
register_sysctl_table(pty_root_table);
/* Now create the /dev/ptmx special device */
tty_default_fops(&ptmx_fops);
ptmx_fops.open = ptmx_open;

4
drivers/tty/serial/21285.c
View File

@ -331,7 +331,7 @@ static int serial21285_verify_port(struct uart_port *port, struct serial_struct
int ret = 0;
if (ser->type != PORT_UNKNOWN && ser->type != PORT_21285)
ret = -EINVAL;
if (ser->irq != NO_IRQ)
if (ser->irq <= 0)
ret = -EINVAL;
if (ser->baud_base != port->uartclk / 16)
ret = -EINVAL;
@ -360,7 +360,7 @@ static struct uart_ops serial21285_ops = {
static struct uart_port serial21285_port = {
.mapbase = 0x42000160,
.iotype = UPIO_MEM,
.irq = NO_IRQ,
.irq = 0,
.fifosize = 16,
.ops = &serial21285_ops,
.flags = UPF_BOOT_AUTOCONF,

21
drivers/tty/serial/8250/8250.c
View File

@ -86,13 +86,6 @@ static unsigned int skip_txen_test; /* force skip of txen test at init time */
#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)
/*
* We default to IRQ0 for the "no irq" hack. Some
* machine types want others as well - they're free
* to redefine this in their header file.
*/
#define is_real_interrupt(irq) ((irq) != 0)
#ifdef CONFIG_SERIAL_8250_DETECT_IRQ
#define CONFIG_SERIAL_DETECT_IRQ 1
#endif
@ -1750,7 +1743,7 @@ static void serial8250_backup_timeout(unsigned long data)
* Must disable interrupts or else we risk racing with the interrupt
* based handler.
*/
if (is_real_interrupt(up->port.irq)) {
if (up->port.irq) {
ier = serial_in(up, UART_IER);
serial_out(up, UART_IER, 0);
}
@ -1775,7 +1768,7 @@ static void serial8250_backup_timeout(unsigned long data)
if (!(iir & UART_IIR_NO_INT))
serial8250_tx_chars(up);
if (is_real_interrupt(up->port.irq))
if (up->port.irq)
serial_out(up, UART_IER, ier);
spin_unlock_irqrestore(&up->port.lock, flags);
@ -2028,7 +2021,7 @@ static int serial8250_startup(struct uart_port *port)
serial_outp(up, UART_LCR, 0);
}
if (is_real_interrupt(up->port.irq)) {
if (up->port.irq) {
unsigned char iir1;
/*
* Test for UARTs that do not reassert THRE when the
@ -2083,7 +2076,7 @@ static int serial8250_startup(struct uart_port *port)
* hardware interrupt, we use a timer-based system. The original
* driver used to do this with IRQ0.
*/
if (!is_real_interrupt(up->port.irq)) {
if (!up->port.irq) {
up->timer.data = (unsigned long)up;
mod_timer(&up->timer, jiffies + uart_poll_timeout(port));
} else {
@ -2099,13 +2092,13 @@ static int serial8250_startup(struct uart_port *port)
spin_lock_irqsave(&up->port.lock, flags);
if (up->port.flags & UPF_FOURPORT) {
if (!is_real_interrupt(up->port.irq))
if (!up->port.irq)
up->port.mctrl |= TIOCM_OUT1;
} else
/*
* Most PC uarts need OUT2 raised to enable interrupts.
*/
if (is_real_interrupt(up->port.irq))
if (up->port.irq)
up->port.mctrl |= TIOCM_OUT2;
serial8250_set_mctrl(&up->port, up->port.mctrl);
@ -2223,7 +2216,7 @@ static void serial8250_shutdown(struct uart_port *port)
del_timer_sync(&up->timer);
up->timer.function = serial8250_timeout;
if (is_real_interrupt(up->port.irq))
if (up->port.irq)
serial_unlink_irq_chain(up);
}

13
drivers/tty/serial/Kconfig
View File

@ -1347,4 +1347,17 @@ config SERIAL_AR933X_NR_UARTS
Set this to the number of serial ports you want the driver
to support.
config SERIAL_EFM32_UART
tristate "EFM32 UART/USART port."
depends on ARCH_EFM32
select SERIAL_CORE
help
This driver support the USART and UART ports on
Energy Micro's efm32 SoCs.
config SERIAL_EFM32_UART_CONSOLE
bool "EFM32 UART/USART console support"
depends on SERIAL_EFM32_UART=y
select SERIAL_CORE_CONSOLE
endmenu

3
drivers/tty/serial/Makefile
View File

@ -61,12 +61,12 @@ obj-$(CONFIG_SERIAL_OF_PLATFORM) += of_serial.o
obj-$(CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL) += nwpserial.o
obj-$(CONFIG_SERIAL_KS8695) += serial_ks8695.o
obj-$(CONFIG_SERIAL_OMAP) += omap-serial.o
obj-$(CONFIG_SERIAL_ALTERA_UART) += altera_uart.o
obj-$(CONFIG_KGDB_SERIAL_CONSOLE) += kgdboc.o
obj-$(CONFIG_SERIAL_QE) += ucc_uart.o
obj-$(CONFIG_SERIAL_TIMBERDALE) += timbuart.o
obj-$(CONFIG_SERIAL_GRLIB_GAISLER_APBUART) += apbuart.o
obj-$(CONFIG_SERIAL_ALTERA_JTAGUART) += altera_jtaguart.o
obj-$(CONFIG_SERIAL_ALTERA_UART) += altera_uart.o
obj-$(CONFIG_SERIAL_VT8500) += vt8500_serial.o
obj-$(CONFIG_SERIAL_MRST_MAX3110) += mrst_max3110.o
obj-$(CONFIG_SERIAL_MFD_HSU) += mfd.o
@ -78,3 +78,4 @@ obj-$(CONFIG_SERIAL_LANTIQ) += lantiq.o
obj-$(CONFIG_SERIAL_XILINX_PS_UART) += xilinx_uartps.o
obj-$(CONFIG_SERIAL_SIRFSOC) += sirfsoc_uart.o
obj-$(CONFIG_SERIAL_AR933X) += ar933x_uart.o
obj-$(CONFIG_SERIAL_EFM32_UART) += efm32-uart.o

47
drivers/tty/serial/altera_uart.c
View File

@ -377,6 +377,26 @@ static int altera_uart_verify_port(struct uart_port *port,
return 0;
}
#ifdef CONFIG_CONSOLE_POLL
static int altera_uart_poll_get_char(struct uart_port *port)
{
while (!(altera_uart_readl(port, ALTERA_UART_STATUS_REG) &
ALTERA_UART_STATUS_RRDY_MSK))
cpu_relax();
return altera_uart_readl(port, ALTERA_UART_RXDATA_REG);
}
static void altera_uart_poll_put_char(struct uart_port *port, unsigned char c)
{
while (!(altera_uart_readl(port, ALTERA_UART_STATUS_REG) &
ALTERA_UART_STATUS_TRDY_MSK))
cpu_relax();
altera_uart_writel(port, c, ALTERA_UART_TXDATA_REG);
}
#endif
/*
* Define the basic serial functions we support.
*/
@ -397,35 +417,16 @@ static struct uart_ops altera_uart_ops = {
.release_port = altera_uart_release_port,
.config_port = altera_uart_config_port,
.verify_port = altera_uart_verify_port,
#ifdef CONFIG_CONSOLE_POLL
.poll_get_char = altera_uart_poll_get_char,
.poll_put_char = altera_uart_poll_put_char,
#endif
};
static struct altera_uart altera_uart_ports[CONFIG_SERIAL_ALTERA_UART_MAXPORTS];
#if defined(CONFIG_SERIAL_ALTERA_UART_CONSOLE)
int __init early_altera_uart_setup(struct altera_uart_platform_uart *platp)
{
struct uart_port *port;
int i;
for (i = 0; i < CONFIG_SERIAL_ALTERA_UART_MAXPORTS && platp[i].mapbase; i++) {
port = &altera_uart_ports[i].port;
port->line = i;
port->type = PORT_ALTERA_UART;
port->mapbase = platp[i].mapbase;
port->membase = ioremap(port->mapbase, ALTERA_UART_SIZE);
port->iotype = SERIAL_IO_MEM;
port->irq = platp[i].irq;
port->uartclk = platp[i].uartclk;
port->flags = UPF_BOOT_AUTOCONF;
port->ops = &altera_uart_ops;
port->private_data = platp;
}
return 0;
}
static void altera_uart_console_putc(struct uart_port *port, const char c)
{
while (!(altera_uart_readl(port, ALTERA_UART_STATUS_REG) &

830
drivers/tty/serial/efm32-uart.c Normal file
View File

@ -0,0 +1,830 @@
#if defined(CONFIG_SERIAL_EFM32_UART_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
#define SUPPORT_SYSRQ
#endif
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/console.h>
#include <linux/sysrq.h>
#include <linux/serial_core.h>
#include <linux/tty_flip.h>
#include <linux/slab.h>
#include <linux/clk.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_data/efm32-uart.h>
#define DRIVER_NAME "efm32-uart"
#define DEV_NAME "ttyefm"
#define UARTn_CTRL 0x00
#define UARTn_CTRL_SYNC 0x0001
#define UARTn_CTRL_TXBIL 0x1000
#define UARTn_FRAME 0x04
#define UARTn_FRAME_DATABITS__MASK 0x000f
#define UARTn_FRAME_DATABITS(n) ((n) - 3)
#define UARTn_FRAME_PARITY_NONE 0x0000
#define UARTn_FRAME_PARITY_EVEN 0x0200
#define UARTn_FRAME_PARITY_ODD 0x0300
#define UARTn_FRAME_STOPBITS_HALF 0x0000
#define UARTn_FRAME_STOPBITS_ONE 0x1000
#define UARTn_FRAME_STOPBITS_TWO 0x3000
#define UARTn_CMD 0x0c
#define UARTn_CMD_RXEN 0x0001
#define UARTn_CMD_RXDIS 0x0002
#define UARTn_CMD_TXEN 0x0004
#define UARTn_CMD_TXDIS 0x0008
#define UARTn_STATUS 0x10
#define UARTn_STATUS_TXENS 0x0002
#define UARTn_STATUS_TXC 0x0020
#define UARTn_STATUS_TXBL 0x0040
#define UARTn_STATUS_RXDATAV 0x0080
#define UARTn_CLKDIV 0x14
#define UARTn_RXDATAX 0x18
#define UARTn_RXDATAX_RXDATA__MASK 0x01ff
#define UARTn_RXDATAX_PERR 0x4000
#define UARTn_RXDATAX_FERR 0x8000
/*
* This is a software only flag used for ignore_status_mask and
* read_status_mask! It's used for breaks that the hardware doesn't report
* explicitly.
*/
#define SW_UARTn_RXDATAX_BERR 0x2000
#define UARTn_TXDATA 0x34
#define UARTn_IF 0x40
#define UARTn_IF_TXC 0x0001
#define UARTn_IF_TXBL 0x0002
#define UARTn_IF_RXDATAV 0x0004
#define UARTn_IF_RXOF 0x0010
#define UARTn_IFS 0x44
#define UARTn_IFC 0x48
#define UARTn_IEN 0x4c
#define UARTn_ROUTE 0x54
#define UARTn_ROUTE_LOCATION__MASK 0x0700
#define UARTn_ROUTE_LOCATION(n) (((n) << 8) & UARTn_ROUTE_LOCATION__MASK)
#define UARTn_ROUTE_RXPEN 0x0001
#define UARTn_ROUTE_TXPEN 0x0002
struct efm32_uart_port {
struct uart_port port;
unsigned int txirq;
struct clk *clk;
};
#define to_efm_port(_port) container_of(_port, struct efm32_uart_port, port)
#define efm_debug(efm_port, format, arg...) \
dev_dbg(efm_port->port.dev, format, ##arg)
static void efm32_uart_write32(struct efm32_uart_port *efm_port,
u32 value, unsigned offset)
{
writel_relaxed(value, efm_port->port.membase + offset);
}
static u32 efm32_uart_read32(struct efm32_uart_port *efm_port,
unsigned offset)
{
return readl_relaxed(efm_port->port.membase + offset);
}
static unsigned int efm32_uart_tx_empty(struct uart_port *port)
{
struct efm32_uart_port *efm_port = to_efm_port(port);
u32 status = efm32_uart_read32(efm_port, UARTn_STATUS);
if (status & UARTn_STATUS_TXC)
return TIOCSER_TEMT;
else
return 0;
}
static void efm32_uart_set_mctrl(struct uart_port *port, unsigned int mctrl)
{
/* sorry, neither handshaking lines nor loop functionallity */
}
static unsigned int efm32_uart_get_mctrl(struct uart_port *port)
{
/* sorry, no handshaking lines available */
return TIOCM_CAR | TIOCM_CTS | TIOCM_DSR;
}
static void efm32_uart_stop_tx(struct uart_port *port)
{
struct efm32_uart_port *efm_port = to_efm_port(port);
u32 ien = efm32_uart_read32(efm_port, UARTn_IEN);
efm32_uart_write32(efm_port, UARTn_CMD_TXDIS, UARTn_CMD);
ien &= ~(UARTn_IF_TXC | UARTn_IF_TXBL);
efm32_uart_write32(efm_port, ien, UARTn_IEN);
}
static void efm32_uart_tx_chars(struct efm32_uart_port *efm_port)
{
struct uart_port *port = &efm_port->port;
struct circ_buf *xmit = &port->state->xmit;
while (efm32_uart_read32(efm_port, UARTn_STATUS) &
UARTn_STATUS_TXBL) {
if (port->x_char) {
port->icount.tx++;
efm32_uart_write32(efm_port, port->x_char,
UARTn_TXDATA);
port->x_char = 0;
continue;
}
if (!uart_circ_empty(xmit) && !uart_tx_stopped(port)) {
port->icount.tx++;
efm32_uart_write32(efm_port, xmit->buf[xmit->tail],
UARTn_TXDATA);
xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
} else
break;
}
if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
uart_write_wakeup(port);
if (!port->x_char && uart_circ_empty(xmit) &&
efm32_uart_read32(efm_port, UARTn_STATUS) &
UARTn_STATUS_TXC)
efm32_uart_stop_tx(port);
}
static void efm32_uart_start_tx(struct uart_port *port)
{
struct efm32_uart_port *efm_port = to_efm_port(port);
u32 ien;
efm32_uart_write32(efm_port,
UARTn_IF_TXBL | UARTn_IF_TXC, UARTn_IFC);
ien = efm32_uart_read32(efm_port, UARTn_IEN);
efm32_uart_write32(efm_port,
ien | UARTn_IF_TXBL | UARTn_IF_TXC, UARTn_IEN);
efm32_uart_write32(efm_port, UARTn_CMD_TXEN, UARTn_CMD);
efm32_uart_tx_chars(efm_port);
}
static void efm32_uart_stop_rx(struct uart_port *port)
{
struct efm32_uart_port *efm_port = to_efm_port(port);
efm32_uart_write32(efm_port, UARTn_CMD_RXDIS, UARTn_CMD);
}
static void efm32_uart_enable_ms(struct uart_port *port)
{
/* no handshake lines, no modem status interrupts */
}
static void efm32_uart_break_ctl(struct uart_port *port, int ctl)
{
/* not possible without fiddling with gpios */
}
static void efm32_uart_rx_chars(struct efm32_uart_port *efm_port,
struct tty_struct *tty)
{
struct uart_port *port = &efm_port->port;
while (efm32_uart_read32(efm_port, UARTn_STATUS) &
UARTn_STATUS_RXDATAV) {
u32 rxdata = efm32_uart_read32(efm_port, UARTn_RXDATAX);
int flag = 0;
/*
* This is a reserved bit and I only saw it read as 0. But to be
* sure not to be confused too much by new devices adhere to the
* warning in the reference manual that reserverd bits might
* read as 1 in the future.
*/
rxdata &= ~SW_UARTn_RXDATAX_BERR;
port->icount.rx++;
if ((rxdata & UARTn_RXDATAX_FERR) &&
!(rxdata & UARTn_RXDATAX_RXDATA__MASK)) {
rxdata |= SW_UARTn_RXDATAX_BERR;
port->icount.brk++;
if (uart_handle_break(port))
continue;
} else if (rxdata & UARTn_RXDATAX_PERR)
port->icount.parity++;
else if (rxdata & UARTn_RXDATAX_FERR)
port->icount.frame++;
rxdata &= port->read_status_mask;
if (rxdata & SW_UARTn_RXDATAX_BERR)
flag = TTY_BREAK;
else if (rxdata & UARTn_RXDATAX_PERR)
flag = TTY_PARITY;
else if (rxdata & UARTn_RXDATAX_FERR)
flag = TTY_FRAME;
else if (uart_handle_sysrq_char(port,
rxdata & UARTn_RXDATAX_RXDATA__MASK))
continue;
if (tty && (rxdata & port->ignore_status_mask) == 0)
tty_insert_flip_char(tty,
rxdata & UARTn_RXDATAX_RXDATA__MASK, flag);
}
}
static irqreturn_t efm32_uart_rxirq(int irq, void *data)
{
struct efm32_uart_port *efm_port = data;
u32 irqflag = efm32_uart_read32(efm_port, UARTn_IF);
int handled = IRQ_NONE;
struct uart_port *port = &efm_port->port;
struct tty_struct *tty;
spin_lock(&port->lock);
tty = tty_kref_get(port->state->port.tty);
if (irqflag & UARTn_IF_RXDATAV) {
efm32_uart_write32(efm_port, UARTn_IF_RXDATAV, UARTn_IFC);
efm32_uart_rx_chars(efm_port, tty);
handled = IRQ_HANDLED;
}
if (irqflag & UARTn_IF_RXOF) {
efm32_uart_write32(efm_port, UARTn_IF_RXOF, UARTn_IFC);
port->icount.overrun++;
if (tty)
tty_insert_flip_char(tty, 0, TTY_OVERRUN);
handled = IRQ_HANDLED;
}
if (tty) {
tty_flip_buffer_push(tty);
tty_kref_put(tty);
}
spin_unlock(&port->lock);
return handled;
}
static irqreturn_t efm32_uart_txirq(int irq, void *data)
{
struct efm32_uart_port *efm_port = data;
u32 irqflag = efm32_uart_read32(efm_port, UARTn_IF);
/* TXBL doesn't need to be cleared */
if (irqflag & UARTn_IF_TXC)
efm32_uart_write32(efm_port, UARTn_IF_TXC, UARTn_IFC);
if (irqflag & (UARTn_IF_TXC | UARTn_IF_TXBL)) {
efm32_uart_tx_chars(efm_port);
return IRQ_HANDLED;
} else
return IRQ_NONE;
}
static int efm32_uart_startup(struct uart_port *port)
{
struct efm32_uart_port *efm_port = to_efm_port(port);
u32 location = 0;
struct efm32_uart_pdata *pdata = dev_get_platdata(port->dev);
int ret;
if (pdata)
location = UARTn_ROUTE_LOCATION(pdata->location);
ret = clk_enable(efm_port->clk);
if (ret) {
efm_debug(efm_port, "failed to enable clk\n");
goto err_clk_enable;
}
port->uartclk = clk_get_rate(efm_port->clk);
/* Enable pins at configured location */
efm32_uart_write32(efm_port, location | UARTn_ROUTE_RXPEN | UARTn_ROUTE_TXPEN,
UARTn_ROUTE);
ret = request_irq(port->irq, efm32_uart_rxirq, 0,
DRIVER_NAME, efm_port);
if (ret) {
efm_debug(efm_port, "failed to register rxirq\n");
goto err_request_irq_rx;
}
/* disable all irqs */
efm32_uart_write32(efm_port, 0, UARTn_IEN);
ret = request_irq(efm_port->txirq, efm32_uart_txirq, 0,
DRIVER_NAME, efm_port);
if (ret) {
efm_debug(efm_port, "failed to register txirq\n");
free_irq(port->irq, efm_port);
err_request_irq_rx:
clk_disable(efm_port->clk);
} else {
efm32_uart_write32(efm_port,
UARTn_IF_RXDATAV | UARTn_IF_RXOF, UARTn_IEN);
efm32_uart_write32(efm_port, UARTn_CMD_RXEN, UARTn_CMD);
}
err_clk_enable:
return ret;
}
static void efm32_uart_shutdown(struct uart_port *port)
{
struct efm32_uart_port *efm_port = to_efm_port(port);
efm32_uart_write32(efm_port, 0, UARTn_IEN);
free_irq(port->irq, efm_port);
clk_disable(efm_port->clk);
}
static void efm32_uart_set_termios(struct uart_port *port,
struct ktermios *new, struct ktermios *old)
{
struct efm32_uart_port *efm_port = to_efm_port(port);
unsigned long flags;
unsigned baud;
u32 clkdiv;
u32 frame = 0;
/* no modem control lines */
new->c_cflag &= ~(CRTSCTS | CMSPAR);
baud = uart_get_baud_rate(port, new, old,
DIV_ROUND_CLOSEST(port->uartclk, 16 * 8192),
DIV_ROUND_CLOSEST(port->uartclk, 16));
switch (new->c_cflag & CSIZE) {
case CS5:
frame |= UARTn_FRAME_DATABITS(5);
break;
case CS6:
frame |= UARTn_FRAME_DATABITS(6);
break;
case CS7:
frame |= UARTn_FRAME_DATABITS(7);
break;
case CS8:
frame |= UARTn_FRAME_DATABITS(8);
break;
}
if (new->c_cflag & CSTOPB)
/* the receiver only verifies the first stop bit */
frame |= UARTn_FRAME_STOPBITS_TWO;
else
frame |= UARTn_FRAME_STOPBITS_ONE;
if (new->c_cflag & PARENB) {
if (new->c_cflag & PARODD)
frame |= UARTn_FRAME_PARITY_ODD;
else
frame |= UARTn_FRAME_PARITY_EVEN;
} else
frame |= UARTn_FRAME_PARITY_NONE;
/*
* the 6 lowest bits of CLKDIV are dc, bit 6 has value 0.25.
* port->uartclk <= 14e6, so 4 * port->uartclk doesn't overflow.
*/
clkdiv = (DIV_ROUND_CLOSEST(4 * port->uartclk, 16 * baud) - 4) << 6;
spin_lock_irqsave(&port->lock, flags);
efm32_uart_write32(efm_port,
UARTn_CMD_TXDIS | UARTn_CMD_RXDIS, UARTn_CMD);
port->read_status_mask = UARTn_RXDATAX_RXDATA__MASK;
if (new->c_iflag & INPCK)
port->read_status_mask |=
UARTn_RXDATAX_FERR | UARTn_RXDATAX_PERR;
if (new->c_iflag & (BRKINT | PARMRK))
port->read_status_mask |= SW_UARTn_RXDATAX_BERR;
port->ignore_status_mask = 0;
if (new->c_iflag & IGNPAR)
port->ignore_status_mask |=
UARTn_RXDATAX_FERR | UARTn_RXDATAX_PERR;
if (new->c_iflag & IGNBRK)
port->ignore_status_mask |= SW_UARTn_RXDATAX_BERR;
uart_update_timeout(port, new->c_cflag, baud);
efm32_uart_write32(efm_port, UARTn_CTRL_TXBIL, UARTn_CTRL);
efm32_uart_write32(efm_port, frame, UARTn_FRAME);
efm32_uart_write32(efm_port, clkdiv, UARTn_CLKDIV);
efm32_uart_write32(efm_port, UARTn_CMD_TXEN | UARTn_CMD_RXEN,
UARTn_CMD);
spin_unlock_irqrestore(&port->lock, flags);
}
static const char *efm32_uart_type(struct uart_port *port)
{
return port->type == PORT_EFMUART ? "efm32-uart" : NULL;
}
static void efm32_uart_release_port(struct uart_port *port)
{
struct efm32_uart_port *efm_port = to_efm_port(port);
clk_unprepare(efm_port->clk);
clk_put(efm_port->clk);
iounmap(port->membase);
}
static int efm32_uart_request_port(struct uart_port *port)
{
struct efm32_uart_port *efm_port = to_efm_port(port);
int ret;
port->membase = ioremap(port->mapbase, 60);
if (!efm_port->port.membase) {
ret = -ENOMEM;
efm_debug(efm_port, "failed to remap\n");
goto err_ioremap;
}
efm_port->clk = clk_get(port->dev, NULL);
if (IS_ERR(efm_port->clk)) {
ret = PTR_ERR(efm_port->clk);
efm_debug(efm_port, "failed to get clock\n");
goto err_clk_get;
}
ret = clk_prepare(efm_port->clk);
if (ret) {
clk_put(efm_port->clk);
err_clk_get:
iounmap(port->membase);
err_ioremap:
return ret;
}
return 0;
}
static void efm32_uart_config_port(struct uart_port *port, int type)
{
if (type & UART_CONFIG_TYPE &&
!efm32_uart_request_port(port))
port->type = PORT_EFMUART;
}
static int efm32_uart_verify_port(struct uart_port *port,
struct serial_struct *serinfo)
{
int ret = 0;
if (serinfo->type != PORT_UNKNOWN && serinfo->type != PORT_EFMUART)
ret = -EINVAL;
return ret;
}
static struct uart_ops efm32_uart_pops = {
.tx_empty = efm32_uart_tx_empty,
.set_mctrl = efm32_uart_set_mctrl,
.get_mctrl = efm32_uart_get_mctrl,
.stop_tx = efm32_uart_stop_tx,
.start_tx = efm32_uart_start_tx,
.stop_rx = efm32_uart_stop_rx,
.enable_ms = efm32_uart_enable_ms,
.break_ctl = efm32_uart_break_ctl,
.startup = efm32_uart_startup,
.shutdown = efm32_uart_shutdown,
.set_termios = efm32_uart_set_termios,
.type = efm32_uart_type,
.release_port = efm32_uart_release_port,
.request_port = efm32_uart_request_port,
.config_port = efm32_uart_config_port,
.verify_port = efm32_uart_verify_port,
};
static struct efm32_uart_port *efm32_uart_ports[5];
#ifdef CONFIG_SERIAL_EFM32_UART_CONSOLE
static void efm32_uart_console_putchar(struct uart_port *port, int ch)
{
struct efm32_uart_port *efm_port = to_efm_port(port);
unsigned int timeout = 0x400;
u32 status;
while (1) {
status = efm32_uart_read32(efm_port, UARTn_STATUS);
if (status & UARTn_STATUS_TXBL)
break;
if (!timeout--)
return;
}
efm32_uart_write32(efm_port, ch, UARTn_TXDATA);
}
static void efm32_uart_console_write(struct console *co, const char *s,
unsigned int count)
{
struct efm32_uart_port *efm_port = efm32_uart_ports[co->index];
u32 status = efm32_uart_read32(efm_port, UARTn_STATUS);
unsigned int timeout = 0x400;
if (!(status & UARTn_STATUS_TXENS))
efm32_uart_write32(efm_port, UARTn_CMD_TXEN, UARTn_CMD);
uart_console_write(&efm_port->port, s, count,
efm32_uart_console_putchar);
/* Wait for the transmitter to become empty */
while (1) {
u32 status = efm32_uart_read32(efm_port, UARTn_STATUS);
if (status & UARTn_STATUS_TXC)
break;
if (!timeout--)
break;
}
if (!(status & UARTn_STATUS_TXENS))
efm32_uart_write32(efm_port, UARTn_CMD_TXDIS, UARTn_CMD);
}
static void efm32_uart_console_get_options(struct efm32_uart_port *efm_port,
int *baud, int *parity, int *bits)
{
u32 ctrl = efm32_uart_read32(efm_port, UARTn_CTRL);
u32 route, clkdiv, frame;
if (ctrl & UARTn_CTRL_SYNC)
/* not operating in async mode */
return;
route = efm32_uart_read32(efm_port, UARTn_ROUTE);
if (!(route & UARTn_ROUTE_TXPEN))
/* tx pin not routed */
return;
clkdiv = efm32_uart_read32(efm_port, UARTn_CLKDIV);
*baud = DIV_ROUND_CLOSEST(4 * efm_port->port.uartclk,
16 * (4 + (clkdiv >> 6)));
frame = efm32_uart_read32(efm_port, UARTn_FRAME);
if (frame & UARTn_FRAME_PARITY_ODD)
*parity = 'o';
else if (frame & UARTn_FRAME_PARITY_EVEN)
*parity = 'e';
else
*parity = 'n';
*bits = (frame & UARTn_FRAME_DATABITS__MASK) -
UARTn_FRAME_DATABITS(4) + 4;
efm_debug(efm_port, "get_opts: options=%d%c%d\n",
*baud, *parity, *bits);
}
static int efm32_uart_console_setup(struct console *co, char *options)
{
struct efm32_uart_port *efm_port;
int baud = 115200;
int bits = 8;
int parity = 'n';
int flow = 'n';
int ret;
if (co->index < 0 || co->index >= ARRAY_SIZE(efm32_uart_ports)) {
unsigned i;
for (i = 0; i < ARRAY_SIZE(efm32_uart_ports); ++i) {
if (efm32_uart_ports[i]) {
pr_warn("efm32-console: fall back to console index %u (from %hhi)\n",
i, co->index);
co->index = i;
break;
}
}
}
efm_port = efm32_uart_ports[co->index];
if (!efm_port) {
pr_warn("efm32-console: No port at %d\n", co->index);
return -ENODEV;
}
ret = clk_prepare(efm_port->clk);
if (ret) {
dev_warn(efm_port->port.dev,
"console: clk_prepare failed: %d\n", ret);
return ret;
}
efm_port->port.uartclk = clk_get_rate(efm_port->clk);
if (options)
uart_parse_options(options, &baud, &parity, &bits, &flow);
else
efm32_uart_console_get_options(efm_port,
&baud, &parity, &bits);
return uart_set_options(&efm_port->port, co, baud, parity, bits, flow);
}
static struct uart_driver efm32_uart_reg;
static struct console efm32_uart_console = {
.name = DEV_NAME,
.write = efm32_uart_console_write,
.device = uart_console_device,
.setup = efm32_uart_console_setup,
.flags = CON_PRINTBUFFER,
.index = -1,
.data = &efm32_uart_reg,
};
#else
#define efm32_uart_console (*(struct console *)NULL)
#endif /* ifdef CONFIG_SERIAL_EFM32_UART_CONSOLE / else */
static struct uart_driver efm32_uart_reg = {
.owner = THIS_MODULE,
.driver_name = DRIVER_NAME,
.dev_name = DEV_NAME,
.nr = ARRAY_SIZE(efm32_uart_ports),
.cons = &efm32_uart_console,
};
static int efm32_uart_probe_dt(struct platform_device *pdev,
struct efm32_uart_port *efm_port)
{
struct device_node *np = pdev->dev.of_node;
int ret;
if (!np)
return 1;
ret = of_alias_get_id(np, "serial");
if (ret < 0) {
dev_err(&pdev->dev, "failed to get alias id: %d\n", ret);
return ret;
} else {
efm_port->port.line = ret;
return 0;
}
}
static int __devinit efm32_uart_probe(struct platform_device *pdev)
{
struct efm32_uart_port *efm_port;
struct resource *res;
int ret;
efm_port = kzalloc(sizeof(*efm_port), GFP_KERNEL);
if (!efm_port) {
dev_dbg(&pdev->dev, "failed to allocate private data\n");
return -ENOMEM;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
ret = -ENODEV;
dev_dbg(&pdev->dev, "failed to determine base address\n");
goto err_get_base;
}
if (resource_size(res) < 60) {
ret = -EINVAL;
dev_dbg(&pdev->dev, "memory resource too small\n");
goto err_too_small;
}
ret = platform_get_irq(pdev, 0);
if (ret <= 0) {
dev_dbg(&pdev->dev, "failed to get rx irq\n");
goto err_get_rxirq;
}
efm_port->port.irq = ret;
ret = platform_get_irq(pdev, 1);
if (ret <= 0)
ret = efm_port->port.irq + 1;
efm_port->txirq = ret;
efm_port->port.dev = &pdev->dev;
efm_port->port.mapbase = res->start;
efm_port->port.type = PORT_EFMUART;
efm_port->port.iotype = UPIO_MEM32;
efm_port->port.fifosize = 2;
efm_port->port.ops = &efm32_uart_pops;
efm_port->port.flags = UPF_BOOT_AUTOCONF;
ret = efm32_uart_probe_dt(pdev, efm_port);
if (ret > 0)
/* not created by device tree */
efm_port->port.line = pdev->id;
if (efm_port->port.line >= 0 &&
efm_port->port.line < ARRAY_SIZE(efm32_uart_ports))
efm32_uart_ports[efm_port->port.line] = efm_port;
ret = uart_add_one_port(&efm32_uart_reg, &efm_port->port);
if (ret) {
dev_dbg(&pdev->dev, "failed to add port: %d\n", ret);
if (pdev->id >= 0 && pdev->id < ARRAY_SIZE(efm32_uart_ports))
efm32_uart_ports[pdev->id] = NULL;
err_get_rxirq:
err_too_small:
err_get_base:
kfree(efm_port);
} else {
platform_set_drvdata(pdev, efm_port);
dev_dbg(&pdev->dev, "\\o/\n");
}
return ret;
}
static int __devexit efm32_uart_remove(struct platform_device *pdev)
{
struct efm32_uart_port *efm_port = platform_get_drvdata(pdev);
platform_set_drvdata(pdev, NULL);
uart_remove_one_port(&efm32_uart_reg, &efm_port->port);
if (pdev->id >= 0 && pdev->id < ARRAY_SIZE(efm32_uart_ports))
efm32_uart_ports[pdev->id] = NULL;
kfree(efm_port);
return 0;
}
static struct of_device_id efm32_uart_dt_ids[] = {
{
.compatible = "efm32,uart",
}, {
/* sentinel */
}
};
MODULE_DEVICE_TABLE(of, efm32_uart_dt_ids);
static struct platform_driver efm32_uart_driver = {
.probe = efm32_uart_probe,
.remove = __devexit_p(efm32_uart_remove),
.driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,
.of_match_table = efm32_uart_dt_ids,
},
};
static int __init efm32_uart_init(void)
{
int ret;
ret = uart_register_driver(&efm32_uart_reg);
if (ret)
return ret;
ret = platform_driver_register(&efm32_uart_driver);
if (ret)
uart_unregister_driver(&efm32_uart_reg);
pr_info("EFM32 UART/USART driver\n");
return ret;
}
module_init(efm32_uart_init);
static void __exit efm32_uart_exit(void)
{
platform_driver_unregister(&efm32_uart_driver);
uart_unregister_driver(&efm32_uart_reg);
}
MODULE_AUTHOR("Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>");
MODULE_DESCRIPTION("EFM32 UART/USART driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:" DRIVER_NAME);

11
drivers/tty/serial/m32r_sio.c
View File

@ -70,13 +70,6 @@
#define PASS_LIMIT 256
/*
* We default to IRQ0 for the "no irq" hack. Some
* machine types want others as well - they're free
* to redefine this in their header file.
*/
#define is_real_interrupt(irq) ((irq) != 0)
#define BASE_BAUD 115200
/* Standard COM flags */
@ -640,7 +633,7 @@ static int m32r_sio_startup(struct uart_port *port)
* hardware interrupt, we use a timer-based system. The original
* driver used to do this with IRQ0.
*/
if (!is_real_interrupt(up->port.irq)) {
if (!up->port.irq) {
unsigned int timeout = up->port.timeout;
timeout = timeout > 6 ? (timeout / 2 - 2) : 1;
@ -687,7 +680,7 @@ static void m32r_sio_shutdown(struct uart_port *port)
sio_init();
if (!is_real_interrupt(up->port.irq))
if (!up->port.irq)
del_timer_sync(&up->timer);
else
serial_unlink_irq_chain(up);

4
drivers/tty/serial/mpc52xx_uart.c
View File

@ -507,7 +507,7 @@ static int __init mpc512x_psc_fifoc_init(void)
psc_fifoc_irq = irq_of_parse_and_map(np, 0);
of_node_put(np);
if (psc_fifoc_irq == NO_IRQ) {
if (psc_fifoc_irq == 0) {
pr_err("%s: Can't get FIFOC irq\n", __func__);
iounmap(psc_fifoc);
return -ENODEV;
@ -1354,7 +1354,7 @@ static int __devinit mpc52xx_uart_of_probe(struct platform_device *op)
}
psc_ops->get_irq(port, op->dev.of_node);
if (port->irq == NO_IRQ) {
if (port->irq == 0) {
dev_dbg(&op->dev, "Could not get irq\n");
return -EINVAL;
}

2
drivers/tty/serial/mux.c
View File

@ -499,7 +499,7 @@ static int __init mux_probe(struct parisc_device *dev)
port->membase = ioremap_nocache(port->mapbase, MUX_LINE_OFFSET);
port->iotype = UPIO_MEM;
port->type = PORT_MUX;
port->irq = NO_IRQ;
port->irq = 0;
port->uartclk = 0;
port->fifosize = MUX_FIFO_SIZE;
port->ops = &mux_pops;

115
drivers/tty/serial/pch_uart.c
View File

@ -29,6 +29,7 @@
#include <linux/nmi.h>
#include <linux/delay.h>
#include <linux/debugfs.h>
#include <linux/dmaengine.h>
#include <linux/pch_dma.h>
@ -144,6 +145,8 @@ enum {
#define PCH_UART_DLL 0x00
#define PCH_UART_DLM 0x01
#define PCH_UART_BRCSR 0x0E
#define PCH_UART_IID_RLS (PCH_UART_IIR_REI)
#define PCH_UART_IID_RDR (PCH_UART_IIR_RRI)
#define PCH_UART_IID_RDR_TO (PCH_UART_IIR_RRI | PCH_UART_IIR_TOI)
@ -243,6 +246,8 @@ struct eg20t_port {
int tx_dma_use;
void *rx_buf_virt;
dma_addr_t rx_buf_dma;
struct dentry *debugfs;
};
/**
@ -292,23 +297,73 @@ static const int trigger_level_64[4] = { 1, 16, 32, 56 };
static const int trigger_level_16[4] = { 1, 4, 8, 14 };
static const int trigger_level_1[4] = { 1, 1, 1, 1 };
static void pch_uart_hal_request(struct pci_dev *pdev, int fifosize,
int base_baud)
{
struct eg20t_port *priv = pci_get_drvdata(pdev);
#ifdef CONFIG_DEBUG_FS
priv->trigger_level = 1;
priv->fcr = 0;
#define PCH_REGS_BUFSIZE 1024
static int pch_show_regs_open(struct inode *inode, struct file *file)
{
file->private_data = inode->i_private;
return 0;
}
static unsigned int get_msr(struct eg20t_port *priv, void __iomem *base)
static ssize_t port_show_regs(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
unsigned int msr = ioread8(base + UART_MSR);
priv->dmsr |= msr & PCH_UART_MSR_DELTA;
struct eg20t_port *priv = file->private_data;
char *buf;
u32 len = 0;
ssize_t ret;
unsigned char lcr;
return msr;
buf = kzalloc(PCH_REGS_BUFSIZE, GFP_KERNEL);
if (!buf)
return 0;
len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
"PCH EG20T port[%d] regs:\n", priv->port.line);
len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
"=================================\n");
len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
"IER: \t0x%02x\n", ioread8(priv->membase + UART_IER));
len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
"IIR: \t0x%02x\n", ioread8(priv->membase + UART_IIR));
len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
"LCR: \t0x%02x\n", ioread8(priv->membase + UART_LCR));
len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
"MCR: \t0x%02x\n", ioread8(priv->membase + UART_MCR));
len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
"LSR: \t0x%02x\n", ioread8(priv->membase + UART_LSR));
len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
"MSR: \t0x%02x\n", ioread8(priv->membase + UART_MSR));
len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
"BRCSR: \t0x%02x\n",
ioread8(priv->membase + PCH_UART_BRCSR));
lcr = ioread8(priv->membase + UART_LCR);
iowrite8(PCH_UART_LCR_DLAB, priv->membase + UART_LCR);
len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
"DLL: \t0x%02x\n", ioread8(priv->membase + UART_DLL));
len += snprintf(buf + len, PCH_REGS_BUFSIZE - len,
"DLM: \t0x%02x\n", ioread8(priv->membase + UART_DLM));
iowrite8(lcr, priv->membase + UART_LCR);
if (len > PCH_REGS_BUFSIZE)
len = PCH_REGS_BUFSIZE;
ret = simple_read_from_buffer(user_buf, count, ppos, buf, len);
kfree(buf);
return ret;
}
static const struct file_operations port_regs_ops = {
.owner = THIS_MODULE,
.open = pch_show_regs_open,
.read = port_show_regs,
.llseek = default_llseek,
};
#endif /* CONFIG_DEBUG_FS */
static void pch_uart_hal_enable_interrupt(struct eg20t_port *priv,
unsigned int flag)
{
@ -442,8 +497,9 @@ static int pch_uart_hal_set_fifo(struct eg20t_port *priv,
static u8 pch_uart_hal_get_modem(struct eg20t_port *priv)
{
priv->dmsr = 0;
return get_msr(priv, priv->membase);
unsigned int msr = ioread8(priv->membase + UART_MSR);
priv->dmsr = msr & PCH_UART_MSR_DELTA;
return (u8)msr;
}
static void pch_uart_hal_write(struct eg20t_port *priv,
@ -524,7 +580,7 @@ static int push_rx(struct eg20t_port *priv, const unsigned char *buf,
static int pop_tx_x(struct eg20t_port *priv, unsigned char *buf)
{
int ret;
int ret = 0;
struct uart_port *port = &priv->port;
if (port->x_char) {
@ -533,8 +589,6 @@ static int pop_tx_x(struct eg20t_port *priv, unsigned char *buf)
buf[0] = port->x_char;
port->x_char = 0;
ret = 1;
} else {
ret = 0;
}
return ret;
@ -1032,14 +1086,12 @@ static irqreturn_t pch_uart_interrupt(int irq, void *dev_id)
static unsigned int pch_uart_tx_empty(struct uart_port *port)
{
struct eg20t_port *priv;
int ret;
priv = container_of(port, struct eg20t_port, port);
if (priv->tx_empty)
ret = TIOCSER_TEMT;
return TIOCSER_TEMT;
else
ret = 0;
return ret;
return 0;
}
/* Returns the current state of modem control inputs. */
@ -1273,9 +1325,8 @@ static void pch_uart_set_termios(struct uart_port *port,
else
parity = PCH_UART_HAL_PARITY_EVEN;
} else {
} else
parity = PCH_UART_HAL_PARITY_NONE;
}
/* Only UART0 has auto hardware flow function */
if ((termios->c_cflag & CRTSCTS) && (priv->fifo_size == 256))
@ -1447,7 +1498,6 @@ static void
pch_console_write(struct console *co, const char *s, unsigned int count)
{
struct eg20t_port *priv;
unsigned long flags;
u8 ier;
int locked = 1;
@ -1554,6 +1604,7 @@ static struct eg20t_port *pch_uart_init_port(struct pci_dev *pdev,
int port_type;
struct pch_uart_driver_data *board;
const char *board_name;
char name[32]; /* for debugfs file name */
board = &drv_dat[id->driver_data];
port_type = board->port_type;
@ -1614,7 +1665,8 @@ static struct eg20t_port *pch_uart_init_port(struct pci_dev *pdev,
spin_lock_init(&priv->port.lock);
pci_set_drvdata(pdev, priv);
pch_uart_hal_request(pdev, fifosize, base_baud);
priv->trigger_level = 1;
priv->fcr = 0;
#ifdef CONFIG_SERIAL_PCH_UART_CONSOLE
pch_uart_ports[board->line_no] = priv;
@ -1623,6 +1675,12 @@ static struct eg20t_port *pch_uart_init_port(struct pci_dev *pdev,
if (ret < 0)
goto init_port_hal_free;
#ifdef CONFIG_DEBUG_FS
snprintf(name, sizeof(name), "uart%d_regs", board->line_no);
priv->debugfs = debugfs_create_file(name, S_IFREG | S_IRUGO,
NULL, priv, &port_regs_ops);
#endif
return priv;
init_port_hal_free:
@ -1639,6 +1697,11 @@ init_port_alloc_err:
static void pch_uart_exit_port(struct eg20t_port *priv)
{
#ifdef CONFIG_DEBUG_FS
if (priv->debugfs)
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);
@ -1646,9 +1709,7 @@ static void pch_uart_exit_port(struct eg20t_port *priv)
static void pch_uart_pci_remove(struct pci_dev *pdev)
{
struct eg20t_port *priv;
priv = (struct eg20t_port *)pci_get_drvdata(pdev);
struct eg20t_port *priv = pci_get_drvdata(pdev);
pci_disable_msi(pdev);

2
drivers/tty/serial/pmac_zilog.c
View File

@ -1506,7 +1506,7 @@ no_dma:
* fixed up interrupt info, but we use the device-tree directly
* here due to early probing so we need the fixup too.
*/
if (uap->port.irq == NO_IRQ &&
if (uap->port.irq == 0 &&
np->parent && np->parent->parent &&
of_device_is_compatible(np->parent->parent, "gatwick")) {
/* IRQs on gatwick are offset by 64 */

10
drivers/tty/serial/sunzilog.c
View File

@ -1397,7 +1397,7 @@ static void __devinit sunzilog_init_hw(struct uart_sunzilog_port *up)
#endif
}
static int zilog_irq = -1;
static int zilog_irq;
static int __devinit zs_probe(struct platform_device *op)
{
@ -1425,7 +1425,7 @@ static int __devinit zs_probe(struct platform_device *op)
rp = sunzilog_chip_regs[inst];
if (zilog_irq == -1)
if (!zilog_irq)
zilog_irq = op->archdata.irqs[0];
up = &sunzilog_port_table[inst * 2];
@ -1580,7 +1580,7 @@ static int __init sunzilog_init(void)
if (err)
goto out_unregister_uart;
if (zilog_irq != -1) {
if (!zilog_irq) {
struct uart_sunzilog_port *up = sunzilog_irq_chain;
err = request_irq(zilog_irq, sunzilog_interrupt, IRQF_SHARED,
"zs", sunzilog_irq_chain);
@ -1621,7 +1621,7 @@ static void __exit sunzilog_exit(void)
{
platform_driver_unregister(&zs_driver);
if (zilog_irq != -1) {
if (!zilog_irq) {
struct uart_sunzilog_port *up = sunzilog_irq_chain;
/* Disable Interrupts */
@ -1637,7 +1637,7 @@ static void __exit sunzilog_exit(void)
}
free_irq(zilog_irq, sunzilog_irq_chain);
zilog_irq = -1;
zilog_irq = 0;
}
if (sunzilog_reg.nr) {

2
drivers/tty/serial/ucc_uart.c
View File

@ -1360,7 +1360,7 @@ static int ucc_uart_probe(struct platform_device *ofdev)
}
qe_port->port.irq = irq_of_parse_and_map(np, 0);
if (qe_port->port.irq == NO_IRQ) {
if (qe_port->port.irq == 0) {
dev_err(&ofdev->dev, "could not map IRQ for UCC%u\n",
qe_port->ucc_num + 1);
ret = -EINVAL;

4
drivers/tty/serial/vr41xx_siu.c
View File

@ -61,7 +61,7 @@
static struct uart_port siu_uart_ports[SIU_PORTS_MAX] = {
[0 ... SIU_PORTS_MAX-1] = {
.lock = __SPIN_LOCK_UNLOCKED(siu_uart_ports->lock),
.irq = -1,
.irq = 0,
},
};
@ -171,7 +171,7 @@ static inline unsigned int siu_check_type(struct uart_port *port)
{
if (port->line == 0)
return PORT_VR41XX_SIU;
if (port->line == 1 && port->irq != -1)
if (port->line == 1 && port->irq)
return PORT_VR41XX_DSIU;
return PORT_UNKNOWN;

11
drivers/tty/sysrq.c
View File

@ -322,11 +322,16 @@ static void send_sig_all(int sig)
{
struct task_struct *p;
read_lock(&tasklist_lock);
for_each_process(p) {
if (p->mm && !is_global_init(p))
/* Not swapper, init nor kernel thread */
force_sig(sig, p);
if (p->flags & PF_KTHREAD)
continue;
if (is_global_init(p))
continue;
force_sig(sig, p);
}
read_unlock(&tasklist_lock);
}
static void sysrq_handle_term(int key)

44
drivers/tty/tty_io.c
View File

@ -1271,6 +1271,19 @@ int tty_init_termios(struct tty_struct *tty)
}
EXPORT_SYMBOL_GPL(tty_init_termios);
int tty_standard_install(struct tty_driver *driver, struct tty_struct *tty)
{
int ret = tty_init_termios(tty);
if (ret)
return ret;
tty_driver_kref_get(driver);
tty->count++;
driver->ttys[tty->index] = tty;
return 0;
}
EXPORT_SYMBOL_GPL(tty_standard_install);
/**
* tty_driver_install_tty() - install a tty entry in the driver
* @driver: the driver for the tty
@ -1286,21 +1299,8 @@ EXPORT_SYMBOL_GPL(tty_init_termios);
static int tty_driver_install_tty(struct tty_driver *driver,
struct tty_struct *tty)
{
int idx = tty->index;
int ret;
if (driver->ops->install) {
ret = driver->ops->install(driver, tty);
return ret;
}
if (tty_init_termios(tty) == 0) {
tty_driver_kref_get(driver);
tty->count++;
driver->ttys[idx] = tty;
return 0;
}
return -ENOMEM;
return driver->ops->install ? driver->ops->install(driver, tty) :
tty_standard_install(driver, tty);
}
/**
@ -1365,7 +1365,6 @@ static int tty_reopen(struct tty_struct *tty)
* @driver: tty driver we are opening a device on
* @idx: device index
* @ret_tty: returned tty structure
* @first_ok: ok to open a new device (used by ptmx)
*
* Prepare a tty device. This may not be a "new" clean device but
* could also be an active device. The pty drivers require special
@ -1385,18 +1384,11 @@ static int tty_reopen(struct tty_struct *tty)
* relaxed for the (most common) case of reopening a tty.
*/
struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx,
int first_ok)
struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx)
{
struct tty_struct *tty;
int retval;
/* Check if pty master is being opened multiple times */
if (driver->subtype == PTY_TYPE_MASTER &&
(driver->flags & TTY_DRIVER_DEVPTS_MEM) && !first_ok) {
return ERR_PTR(-EIO);
}
/*
* First time open is complex, especially for PTY devices.
* This code guarantees that either everything succeeds and the
@ -1797,11 +1789,11 @@ int tty_release(struct inode *inode, struct file *filp)
* the slots and preserving the termios structure.
*/
release_tty(tty, idx);
tty_unlock();
/* Make this pty number available for reallocation */
if (devpts)
devpts_kill_index(inode, idx);
tty_unlock();
return 0;
}
@ -1950,7 +1942,7 @@ retry_open:
if (retval)
tty = ERR_PTR(retval);
} else
tty = tty_init_dev(driver, index, 0);
tty = tty_init_dev(driver, index);
mutex_unlock(&tty_mutex);
if (driver)

16
drivers/usb/serial/usb-serial.c
View File

@ -214,15 +214,14 @@ static int serial_install(struct tty_driver *driver, struct tty_struct *tty)
if (!try_module_get(serial->type->driver.owner))
goto error_module_get;
/* perform the standard setup */
retval = tty_init_termios(tty);
if (retval)
goto error_init_termios;
retval = usb_autopm_get_interface(serial->interface);
if (retval)
goto error_get_interface;
retval = tty_standard_install(driver, tty);
if (retval)
goto error_init_termios;
mutex_unlock(&serial->disc_mutex);
/* allow the driver to update the settings */
@ -231,14 +230,11 @@ static int serial_install(struct tty_driver *driver, struct tty_struct *tty)
tty->driver_data = port;
/* Final install (we use the default method) */
tty_driver_kref_get(driver);
tty->count++;
driver->ttys[idx] = tty;
return retval;
error_get_interface:
error_init_termios:
usb_autopm_put_interface(serial->interface);
error_get_interface:
module_put(serial->type->driver.owner);
error_module_get:
error_no_port:

85
fs/devpts/inode.c
View File

@ -36,7 +36,61 @@
#define DEVPTS_DEFAULT_PTMX_MODE 0000
#define PTMX_MINOR 2
extern int pty_limit; /* Config limit on Unix98 ptys */
/*
* sysctl support for setting limits on the number of Unix98 ptys allocated.
* Otherwise one can eat up all kernel memory by opening /dev/ptmx repeatedly.
*/
static int pty_limit = NR_UNIX98_PTY_DEFAULT;
static int pty_reserve = NR_UNIX98_PTY_RESERVE;
static int pty_limit_min;
static int pty_limit_max = INT_MAX;
static int pty_count;
static struct ctl_table pty_table[] = {
{
.procname = "max",
.maxlen = sizeof(int),
.mode = 0644,
.data = &pty_limit,
.proc_handler = proc_dointvec_minmax,
.extra1 = &pty_limit_min,
.extra2 = &pty_limit_max,
}, {
.procname = "reserve",
.maxlen = sizeof(int),
.mode = 0644,
.data = &pty_reserve,
.proc_handler = proc_dointvec_minmax,
.extra1 = &pty_limit_min,
.extra2 = &pty_limit_max,
}, {
.procname = "nr",
.maxlen = sizeof(int),
.mode = 0444,
.data = &pty_count,
.proc_handler = proc_dointvec,
},
{}
};
static struct ctl_table pty_kern_table[] = {
{
.procname = "pty",
.mode = 0555,
.child = pty_table,
},
{}
};
static struct ctl_table pty_root_table[] = {
{
.procname = "kernel",
.mode = 0555,
.child = pty_kern_table,
},
{}
};
static DEFINE_MUTEX(allocated_ptys_lock);
static struct vfsmount *devpts_mnt;
@ -49,10 +103,11 @@ struct pts_mount_opts {
umode_t mode;
umode_t ptmxmode;
int newinstance;
int max;
};
enum {
Opt_uid, Opt_gid, Opt_mode, Opt_ptmxmode, Opt_newinstance,
Opt_uid, Opt_gid, Opt_mode, Opt_ptmxmode, Opt_newinstance, Opt_max,
Opt_err
};
@ -63,6 +118,7 @@ static const match_table_t tokens = {
#ifdef CONFIG_DEVPTS_MULTIPLE_INSTANCES
{Opt_ptmxmode, "ptmxmode=%o"},
{Opt_newinstance, "newinstance"},
{Opt_max, "max=%d"},
#endif
{Opt_err, NULL}
};
@ -109,6 +165,7 @@ static int parse_mount_options(char *data, int op, struct pts_mount_opts *opts)
opts->gid = 0;
opts->mode = DEVPTS_DEFAULT_MODE;
opts->ptmxmode = DEVPTS_DEFAULT_PTMX_MODE;
opts->max = NR_UNIX98_PTY_MAX;
/* newinstance makes sense only on initial mount */
if (op == PARSE_MOUNT)
@ -152,6 +209,12 @@ static int parse_mount_options(char *data, int op, struct pts_mount_opts *opts)
if (op == PARSE_MOUNT)
opts->newinstance = 1;
break;
case Opt_max:
if (match_int(&args[0], &option) ||
option < 0 || option > NR_UNIX98_PTY_MAX)
return -EINVAL;
opts->max = option;
break;
#endif
default:
printk(KERN_ERR "devpts: called with bogus options\n");
@ -258,6 +321,8 @@ static int devpts_show_options(struct seq_file *seq, struct dentry *root)
seq_printf(seq, ",mode=%03o", opts->mode);
#ifdef CONFIG_DEVPTS_MULTIPLE_INSTANCES
seq_printf(seq, ",ptmxmode=%03o", opts->ptmxmode);
if (opts->max < NR_UNIX98_PTY_MAX)
seq_printf(seq, ",max=%d", opts->max);
#endif
return 0;
@ -438,6 +503,12 @@ retry:
return -ENOMEM;
mutex_lock(&allocated_ptys_lock);
if (pty_count >= pty_limit -
(fsi->mount_opts.newinstance ? pty_reserve : 0)) {
mutex_unlock(&allocated_ptys_lock);
return -ENOSPC;
}
ida_ret = ida_get_new(&fsi->allocated_ptys, &index);
if (ida_ret < 0) {
mutex_unlock(&allocated_ptys_lock);
@ -446,11 +517,12 @@ retry:
return -EIO;
}
if (index >= pty_limit) {
if (index >= fsi->mount_opts.max) {
ida_remove(&fsi->allocated_ptys, index);
mutex_unlock(&allocated_ptys_lock);
return -EIO;
return -ENOSPC;
}
pty_count++;
mutex_unlock(&allocated_ptys_lock);
return index;
}
@ -462,6 +534,7 @@ void devpts_kill_index(struct inode *ptmx_inode, int idx)
mutex_lock(&allocated_ptys_lock);
ida_remove(&fsi->allocated_ptys, idx);
pty_count--;
mutex_unlock(&allocated_ptys_lock);
}
@ -558,11 +631,15 @@ void devpts_pty_kill(struct tty_struct *tty)
static int __init init_devpts_fs(void)
{
int err = register_filesystem(&devpts_fs_type);
struct ctl_table_header *table;
if (!err) {
table = register_sysctl_table(pty_root_table);
devpts_mnt = kern_mount(&devpts_fs_type);
if (IS_ERR(devpts_mnt)) {
err = PTR_ERR(devpts_mnt);
unregister_filesystem(&devpts_fs_type);
unregister_sysctl_table(table);
}
}
return err;

4
include/linux/altera_uart.h
View File

@ -5,8 +5,6 @@
#ifndef __ALTUART_H
#define __ALTUART_H
#include <linux/init.h>
struct altera_uart_platform_uart {
unsigned long mapbase; /* Physical address base */
unsigned int irq; /* Interrupt vector */
@ -14,6 +12,4 @@ struct altera_uart_platform_uart {
unsigned int bus_shift; /* Bus shift (address stride) */
};
int __init early_altera_uart_setup(struct altera_uart_platform_uart *platp);
#endif /* __ALTUART_H */

18
include/linux/platform_data/efm32-uart.h Normal file
View File

@ -0,0 +1,18 @@
/*
*
*
*/
#ifndef __LINUX_PLATFORM_DATA_EFM32_UART_H__
#define __LINUX_PLATFORM_DATA_EFM32_UART_H__
#include <linux/types.h>
/**
* struct efm32_uart_pdata
* @location: pinmux location for the I/O pins (to be written to the ROUTE
* register)
*/
struct efm32_uart_pdata {
u8 location;
};
#endif /* ifndef __LINUX_PLATFORM_DATA_EFM32_UART_H__ */

2
include/linux/serial_core.h
View File

@ -210,6 +210,8 @@
/* Atheros AR933X SoC */
#define PORT_AR933X 99
/* Energy Micro efm32 SoC */
#define PORT_EFMUART 100
#ifdef __KERNEL__

6
include/linux/tty.h
View File

@ -52,6 +52,7 @@
* hardcoded at present.)
*/
#define NR_UNIX98_PTY_DEFAULT 4096 /* Default maximum for Unix98 ptys */
#define NR_UNIX98_PTY_RESERVE 1024 /* Default reserve for main devpts */
#define NR_UNIX98_PTY_MAX (1 << MINORBITS) /* Absolute limit */
/*
@ -480,10 +481,11 @@ extern void free_tty_struct(struct tty_struct *tty);
extern void initialize_tty_struct(struct tty_struct *tty,
struct tty_driver *driver, int idx);
extern void deinitialize_tty_struct(struct tty_struct *tty);
extern struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx,
int first_ok);
extern struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx);
extern int tty_release(struct inode *inode, struct file *filp);
extern int tty_init_termios(struct tty_struct *tty);
extern int tty_standard_install(struct tty_driver *driver,
struct tty_struct *tty);
extern struct tty_struct *tty_pair_get_tty(struct tty_struct *tty);
extern struct tty_struct *tty_pair_get_pty(struct tty_struct *tty);